Opening Roller with Screw Cap and Securing Element

Abstract

The invention relates to an opening roller (1) for an open-end spinning device with a base body (2) that is detachably connected to a mountings carrier (3) by means of a screw cap (8), whereas the mountings carrier (3) for connecting to the base body (2) in respect of this is rotatable around an axis of rotation (A) from a disengaged position into an engaged position and, from this, further into an end-layer locking position. In accordance with the invention, the screw cap (8) includes at least one securing element (23), which prevents the mountings carrier (3) from, during operation, moving in respect of the base body (2) from the engaged position into the disengaged position.

Description

This invention relates to an opening roller for an open-end spinning device with a base body that is detachably connected to a mountings carrier by means of a screw cap, whereas the mountings carrier for connecting to the base body in respect of this is rotatable around an axis of rotation from a disengaged position into an engaged position and, from this, further into an end-layer locking position.

U.S. Pat. No. 4,296,527 A discloses an opening roller for an open-end spinning device, which features a screw cap formed as a screw lock. Thereby, the base body features an external thread, and the mountings carrier features an internal thread. It is thereby problematic that, during operation, the mountings carrier can detach from the base body if previously this had not been properly screwed, with sufficient pressing force, into the mountings carrier until it reached the stop. There is also the risk that a mountings carrier properly screwed into the base body will detach from the base body after a long period of operation, based on wear and/or vibrations.

Thus, the task of this invention is to create an opening roller with a secure screw cap, in order to avoid the mountings carrier being detached from the base body during operation.

The task is solved by means of an opening roller with the characteristics of independent claim 1.

In accordance with the invention, the opening roller for an open-end spinning device features a base body and a mountings carrier. The base body and the mountings carrier are detachably connected to one another by means of a screw cap. The screw cap is preferably a quick-release connection element, by means of which a quick and uncomplicated assembly and disassembly of the mountings carrier on the base body is ensured. To connect to the base body, the mountings carrier is rotatable in respect of this and/or relative to this around an axis of rotation from a disengaged position into an engaged position and, from this, further into an end-layer locking position.

In the disengaged position, the mountings carrier and the base body are decoupled from each other, such that the mountings carrier is able to be removed from the base body.

In contrast to this, in the engaged position, there is a coupling between these two bodies in the axial direction of the opening roller, such that the mountings carrier can no longer be removed from the base body through a pure axial movement. However, the two bodies in the engaged position are still loosely connected to each other in the circumferential direction of the opening roller, such that they can be twisted towards each other in respect of the axis of rotation. The coupling of the mountings carrier with the base body is preferably formed in the engaged position, in such a manner that a first rear separation of the mountings carrier is engaged in a second rear separation of the base body in a positive-locking manner, in such a manner that these are connected to each other in a positive-locking manner in the axial direction of the opening roller.

In contrast to the engaged position, only in the locking position is there a coupling between the mountings carrier and the base body, not only in an axial direction but also in a circumferential direction of the opening roller. In the locking position, the mountings carrier is securely locked in respect of the base body, such that the mountings carrier cannot be detached from the base body during operation.

The screw cap includes at least one securing element. This prevents the mountings carrier from, during operation, moving in respect of the base body from the engaged position into the disengaged position. This is particularly advantageous if the mountings carrier had been, prior to this, not properly rotated into the locking position when connecting to the base body. However, it is also conceivable that a properly locked mountings carrier moves from the locking position into the engaged position if, for example, parts of the screw cap—the effect of which is to hold the mountings carrier in the locking position in respect of the base body—are no longer in the position for this purpose, due to wear or damage. Advantageously, the complete detaching of the mountings carrier from the base body during operation can thus be avoided by means of the securing element.

It is advantageous if the securing element is movable between a secured position and an open position, preferably in an essentially axial direction of the opening roper. In the secured position, the securing element prevents a twisting of the mountings carrier from the engaged position into the disengaged position. In the open position, the securing element enables, for assembly, a twisting of the mountings carrier from the disengaged position into the engaged position, and, for disassembly, from the engaged position into the disengaged position. Thus, advantageously, a quick and uncomplicated assembly and disassembly of the mountings carrier on the base body is ensured, with the equivalent securing of the mountings carrier in the engaged position during operation.

Advantageously, the securing element is arranged on the base body. In doing so, the repair costs of the opening roller can be reduced, as the mountings carrier is subject to greater wear than the base body. As a result, the securing element remains in place, even if there is a frequent replacement of the mountings carrier.

It is also advantageous if the securing element is formed in such a manner that, upon the movement from the secured position into the open position in the axial direction of the opening roller, it moves, at least partially, in the direction of the base body. This can enable the assembly and disassembly of the mountings carrier on the base body. Thus, the mountings carrier initially must be set on the base body and subsequently pressed against it, whereas the securing element moves from the secured position into the open position in the axial direction of the opening roller. Preferably, the movement of the securing element takes place as a swivel or a sliding movement.

It is problematic if the securing element must be moved manually from the open position back into the secured position. Namely, in this case, it may occur that the mountings carrier is unsecured in respect of the base body if the operator had previously forgotten to move the securing element back into the secured position. On the basis of this, it is advantageous if the securing element is formed in such a manner that, after a tilting into the open position, in particular upon the assembly and/or disassembly of the mountings carrier on the base body, it independently returns to the secured position.

A self-locking securing element that automatically returns into the secured position can be implemented simply and cost-effectively in terms of design by forming the securing element as a spring. Thereby, the securing element may be completely formed as a spring element, or more precisely may also feature only areas or components formed as individual springs. The securing element formed as a spring is formed in such a manner that, upon a tilting into the open position, it is spring-loaded in the direction of the secured position and/or spring-balanced in the secured position. As a result, upon the assembly and/or disassembly of the mountings carrier on the base body, a user must overcome a spring force threshold, which is determined by the spring force of the securing element. In order to move the securing element from the secured position into the open position, a user must apply an assembly force greater than such spring force threshold. At the same time, the spring force threshold is so high that the rotation forces acting on the securing element during operation do not exceed such spring force threshold.

If the securing element is formed as a spring or as a securing element with spring action, there is the risk that, upon the assembly or disassembly of the mountings carrier, the securing element or parts of it are plastically deformed; i.e., if the assembly force applied by the user exceeds the plastic deformation threshold. As a result, it is advantageous if the securing element formed as a spring features at least one overload stop, on which it contacts, in particular upon tilting into the open position, before it is plastically deformed.

In one advantageous embodiment of the invention, the securing element is formed as a securing device spring leg. This preferably features a base, a free end and a bending area formed between these two items. The free end and/or the bending area (at least partially) are formed in a swiveling or tilting manner around the base, in particular in an axial direction of the opening roller, between the secured position and the open position. In doing so, the securing element may be implemented simply and cost-effectively in terms of design.

It is advantageous if the securing device spring leg is spaced from the axis of rotation in an axial direction, and/or extends essentially in the circumferential direction of the opening roper. In doing so, the securing device spring leg can be formed with sufficient length, such that the spring force threshold can be adjusted in such a manner that an easy assembly and disassembly of the mountings carrier on the mountings ring can be ensured. At the same time, the spring force threshold can also be adjusted in such a manner that the force exerted in the operating condition on the securing element of the mountings carrier does not exceed the spring force threshold, thus preventing the mountings carrier from moving from the engaged position into the disengaged position.

It is also advantageous if the securing device spring leg, in particular in the area of the bending area and/or the free end, features a riser slope, which is inclined in respect of the base by an angle α, in particular in the direction of the base body. Thus, in particular, a connection element of the mountings carrier may, upon a shifting of it from the engaged position into the disengaged position, slide along the riser slope, such that the mountings carrier is movable into the disengaged position in respect of the base body.

A shifting of the mountings carrier in respect of the base body from the engaged position into the disengaged position may also be improved if the securing device spring leg features an exit area in the area of its free end, in particular a curvature. Thereby, a blocking of the mountings carrier, in particular its connection element, can be prevented through the free end of the securing device spring leg upon the disassembly of the mountings carrier.

In order to ensure an easy disassembly of the mountings carrier from the base body, it is advantageous if the exit area is inclined in respect of the base by an angle β, in particular in the direction of the base body, whereas the angle α is preferably less than the angle β.

It is advantageous if the screw cap features at least one connection element (in particular, hook-shaped) with a locking edge arranged on one of the two bodies (i.e., the base body or the mountings carrier) and one locking element with a locking shoulder (in particular, formed as a locking device spring leg) arranged on the other body, and/or the locking shoulder is engaged in the locking edge in the locking position, such that the two bodies are spring-loaded in an axial direction to each other and the mountings carrier is locked in the locking position by means of the locking element.

It is also advantageous if the free end of the securing device spring leg is arranged, in the circumferential direction of the opening roller, adjacent to the base of the locking device spring leg. This can ensure that the mountings carrier, in particular its connection element, impinges against the free end of the securing element, if the mountings carrier previously had not been properly locked in the locking position.

Together with at least one securing element, the screw cap can be implemented simply and cost-effectively in terms of design if at least one securing device spring leg and at least one locking device spring leg are formed as one unit, in particular as a one-piece leaf spring.

The screw cap is preferably formed in accordance with one or more characteristics of the quick-release fastener disclosed in the German patent application with the file number 10 2012 100 526.5.

Accordingly, the mountings carrier is provided for an opening roller of an open-end spinning device rotatably mounted around an axis of rotation. It features parts of a quick-release fastener, by means of which the mountings carrier is able to be detachably fastened on a base body of the opening roller. The quick-release fastener is formed as a screw cap, such that the mountings carrier is able to be detachably connected to the base body by means of a rotary movement around the axis of rotation, which takes place relative to the base body provided for this purpose. This ensures a very quick and easy assembly and disassembly of the mountings carrier on/from the base body of the opening roller. At the same time, a secure attachment of the mountings carrier on the base body is ensured through the screw cap, because the forces acting on the connection, in particular axially, do not bring about a detachment of the mountings carrier from the base body.

A secure attachment of the mountings carrier on the base body can be improved if the screw cap is formed in such a manner that the rotary movement for locking the mountings carrier on the base body takes place against the direction of rotation of the opening roller. The primary reason for this is that, upon starting the opening roller and during the detachment of the fiber band, the primary forces act on the connection between the mountings carrier and the base body against the direction of rotation. Accordingly, the unintentional detachment of the mountings carrier from the base body through a rotation in the direction of rotation of the opening roller can be ruled out.

It is advantageous if the mountings carrier features at least one connection element radially spaced from the rotational axis. This is formed in such a manner that it may correspond to a spring element of the base body. Thereby, with the spring element, it forms a positive-locking connection in an axial direction. The connection element is preferably formed in a hook-shaped manner. As an alternative or in addition, it can be formed as a rear separation, a rib and/or a groove in the mountings carrier. Thus, advantageously, the screw cap may be produced very easily and cost-effectively. In addition, a very solid and stable positive-locking connection between the mountings carrier and the base body is thereby ensured, such that a detachment of the mountings carrier from the base body through an axial force can be ruled out.

It is advantageous if the connection element for the insertion of the spring element features a first opening, which is oriented in a circumferential direction, and/or features a second opening, which preferably points radially inward. Thereby, the screw cap may be formed in a very space-saving manner. Moreover, advantageously, the spring element may be arranged radially inward, and the corresponding connection element may be arranged radially outward, on the mountings carrier and/or the base body, enabling a more simple design of the spring element.

It is also advantageous if, during the rotating process, the connection element for guiding and tensioning the spring element features a spring contact surface, in order to ensure a proper locking of the mountings carrier at the base body. In this regard, it is also advantageous if the spring contact surface points away from the base body provided for this and/or to the mountings carrier, because the mountings carrier is, by means of the spring force applied from the spring element, pressed against the spring contact surface, pressed against the base body.

It is also advantageous if the mountings carrier features at least one first contact surface, which may correspond to a first contact surface of the base body, which forms a positive-locking fit between the mountings carrier and the base body in a circumferential direction. The two first contact surfaces lie next to each other, if the mountings carrier, for connecting to the base body, is twisted in respect of this, in particular against the direction of rotation. Thereby, a very stable positive-locking connection, which is able to absorb high force, is formed between the mountings carrier and the base body, in particular against the direction of rotation of the opening roller. Accordingly, upon a rotation of the opening roller, it can be ruled out that the connection between the connection element and the spring element is unintentionally released. In a preferred embodiment, the first contact surface is arranged on the mountings carrier in such a manner that it points in a circumferential direction. Thereby, the first contact surfaces are able to absorb very high forces, without the mountings carrier slipping in respect of the base body.

As an alternative or in addition, it is advantageous if the mountings carrier features at least one second contact surface, which may correspond to a second contact surface of the base body, that forms a positive-locking fit between the mountings carrier and the base body in an axial direction. The two second contact surfaces do not lie next to each other, but feature a clearance from each other, if the mountings carrier, for connecting to the base body, is twisted in respect of this, in particular against the direction of rotation. Thus, the second contact surfaces act as overload protection for the spring element, if the mountings carrier incorrectly would like to be removed from the base body by means of an axial movement. In a preferred embodiment, the first contact surface is arranged on the mountings carrier in such a manner that it points in an axial direction. Thereby, the second contact surfaces are able to absorb very high forces, without the mountings carrier slipping in respect of the base body.

The first contact surface is produced easily and cost-effectively, if it is formed at the connection element, in particular as a recess. In addition, a particularly space-saving design of the screw cap is thereby enabled, because an overlap area between the second contact surfaces can be formed at the same time.

It is advantageous if the recess is preferably formed in the area of a first flank of the connection element and/or such first flank preferably points against the direction of rotation, as these come into contact with the connection element of the base body upon the locking of the mountings carrier in the base body with a rotary movement against the direction of rotation of the opening roller, and thus a positive-locking connection forms against the direction of rotation.

For the disassembly of the mountings carrier from the base body, this must be twisted in the direction of rotation of the opening roller relative to the mountings carrier. In order to prevent the accidental detachment of the mountings carrier from the base body, and to provide acoustic and/or haptic feedback to the user upon the assembly of the mountings carriers—as soon as the mountings carrier is properly attached to the base body—it is advantageous if the mountings carrier features a locking edge, which is able to correspond with a locking shoulder of a spring element of the base body.

A compact structural shape can be realized if the locking edge on the connection element is formed in a manner spaced from the first flank in a circumferential direction, in particular in the area of a second flank of the connection element. In addition, the two contact surfaces corresponding to each other thus only come into contact in the locking edge when the locking shoulder is engaged. The recess and the locking edge are preferably located at the two opposing flanks of the connection element.

It is advantageous if the mountings carrier features a spring element that is able to correspond with a connection element arranged on the base body.

It is also advantageous, if the mountings carrier features several connection elements spaced from each other in a circumferential direction. Thus, the individual connection elements can be carried out smaller, because the forces acting are divided on several connection elements.

According to one advantageous embodiment of the invention, the mountings carrier, in particular in the area of its front side, features at least one radial depression, which is able to engage in a radial elevation of the base body, in particular in the area of its groove, in such a manner that a positive-locking fit is formed in at least one of the two circumferential directions. Accordingly, the depression formed in a circumferential direction in a coded angle position and/or form acts as a key element, which ensures that only such a mountings carrier that possesses an appropriately corresponding depression can be attached to a base body formed with the coded elevation. This can prevent copies of the mountings carrier—the quality of which cannot be guaranteed, and which therefore pose an increased risk of accidents due to the increased risk of detachment—from being fastened to the base body. For a mountings carrier formed in two pieces with a mountings holder and a mountings ring, the depression also has the advantage that the mountings ring can then only be connected with the base body, if it is correctly oriented in respect of this. Furthermore, a secure taking along of the mountings ring in the direction of rotation is ensured by means of the positive-locking connection that is thus formed between the base body and the mountings ring. A sliding through of the mountings ring can therefore be ruled out.

If the mountings carrier is formed from one piece, or the mountings holder is connected to the mountings ring in a torque-proof manner, it is advantageous if the depression extends in a circumferential direction across an angle area, which essentially corresponds to the angle of twist of the mountings carrier in respect of the base body. Thus, if the base body features at least one elevation, it can be ensured that the mountings carrier is able to be rotated in the base body. Thus, the depression and elevation, which correspond to each other, form a positive-locking connection of the mountings carrier to the base body only in one of the two circumferential directions, in particular against the direction of rotation.

It is also advantageous if the mountings carrier is formed in two pieces, whereas the mountings carrier features a mountings holder and an associated mountings ring. This can reduce the costs of replacement parts, because, essentially, only the mountings ring must be replaced, and the entire mountings carrier no longer must be replaced.

If at least one connection element is arranged on the mountings holder, the mountings ring can be advantageously pressed in between the mountings holder and the base body in an axial direction.

Advantageously, the opening roller for an open-end spinning device features one base body and one mountings carrier. Preferably, the opening roller is, by means of the base body, able to be fastened in a torque-proof manner to a drive shaft of the open-end spinning device. The mountings carrier preferably features mountings for detaching a fiber tape. The base body and the mountings carrier are able to rotate around a common axis of rotation, and are detachably connected by means of a quick-release fastener. The quick-release fastener is formed as a screw cap, such that the mountings carrier is detachably connected to the base body by means of a rotary movement around the axis of rotation relative to the base body. This ensures a very fight and secure connection, in particular in an axial direction between the base body and the mountings carrier, such that a detachment of the mountings carrier from the base body can be ruled out. In addition, the screw cap enables an easy and quick assembly and disassembly of the mountings carrier, which greatly reduces the maintenance and repair times for the replacement of wearing parts, such as, in particular, the mountings carrier.

In one embodiment of the invention, the mountings carrier is formed in accordance with the preceding description, whereas the specified characteristics can be present individually or in any combination.

It is advantageous if the mountings carrier is, in an axial direction, connected to the base body in a positive-locking manner. Thus, the connection between the mountings carrier and the base body can absorb very high forces in an axial direction, which ensures a secure anchoring of the mountings carrier in the base body. As an alternative or in addition, it is also advantageous if the mountings carrier is, in a circumferential direction, connected to the base body in a positive-locking and/or force-locking manner. An unintentional detachment of the mountings carrier from the base body can be avoided in particular if it is connected to the base body in a positive-locking manner opposite to the direction of rotation. Such a positive-locking connection is particularly suitable for absorbing high forces acting on the connection between the mountings carrier and the base body, in particular against the direction of rotation, if, upon the rotation of the opening roller, the fiber tape detaches through the mountings. Such forces, which act against the direction of rotation, also occur upon starting the opening roller. By contrast, during the operation of the opening roller, only low forces act in the direction of rotation. As a result, it is advantageous if the mountings carrier, in particular in the direction of rotation of the opening roller, is connected to the base body in a force-locking manner, since, with a sufficiently strong connection of the mountings carrier to the base body, an easy assembly and disassembly of the mountings carrier from the base body is ensured at the same time. Essentially, forces acting in the direction of rotation occur only with the braking of the opening roller. Accordingly, the force-locking or positive-locking connection between the mountings carrier and the base body in the direction of rotation is designed in such a manner that it will not release upon such braking forces.

It is also advantageous if the base body and/or the mountings carrier features at least one connection element radially spaced from the rotational axis. Thus, through a simple rotary movement, the connection element can be engaged with a corresponding component, in particular a spring element. For this purpose, it is advantageous if the connection element is preferably hook-shaped. As an alternative or in addition, the connection element may also be formed as a rear separation, depression, elevation, groove and/or rib in the base body and/or the mountings carrier. For this purpose, the connection element may also feature a first and a second opening, in which the corresponding component, in particular the spring element and/or a comparable connection element, engages at least partially. Moreover, a connection element formed as a groove and/or rib may extend over the entire circumference of the base body and/or the mountings carrier. In order to enable an axial insertion of the mountings carrier into the base body, the connection element formed as a groove and/or a rib features at least one gap, into which the corresponding component, in particular the spring element and/or an additional connection element, can be inserted. Thus, advantageously, the connection elements may be very easily and cost-effectively produced in the base body and/or the mountings carrier.

In order to connect the mountings carrier with the base body in the direction of rotation of the opening roller in such a manner that the latter is easily assembled on the base body and easily disassembled from it, it is advantageous if the base body and/or the mountings carrier feature a spring element, in particular a leaf spring. Of course, the spring element may also be formed as any other previously known spring. The spring element is arranged on the base body and/or on the mountings carrier in such a manner it presses the base body and the mountings carrier to each other, in an axial direction, in particular when engaging in the connection element. Thereby, a force-locking connection between the base body and the mountings carrier is formed in a circumferential direction. The pressing force of the spring element is so great that, on the one hand, the connection of the opening roller upon braking is not released, and, at the same time on the other hand, it can be detached through the physical strength of an average person. Therefore, a very quick and easy assembly and disassembly of the mountings carrier from the base body, at the same time with a high degree of detachment security, is ensured. In addition, through the pressing together, a connection between the mountings carrier and the base body, which is essentially clearance-free, in the detachment area, in particular in the area of the mountings, is ensured. As a result, there can be no adherence here of fibers that, through continuous accumulation and subsequent detachment, would lead to irregularities and/or contaminants in the yarn.

It is advantageous if each of the base body and the mountings carrier feature at least one first and/or one second contact surface. The first contact surface is arranged on the base body and the mountings carrier in such a manner that they lie next to each other if the mountings carrier, for connecting to the base body, is twisted in respect of the base body, in particular against the direction of rotation. Advantageously, a positive-locking connection of the mountings carrier with the base body is thereby formed in a circumferential direction, by which the screw cap, in particular against direction of rotation of the opening roller, may absorb high forces, which act on the screw cap in particular upon starting the opening roller and upon detaching the fiber band. Further advantageously, by means of the first contact surfaces adjacent to each other, a defined rotating position of the mountings carrier in respect of the base body is determined, with which the connection element and/or the spring element of the mountings carrier ideally engaged in the connection element and/or the spring element of the base body.

The second contact surface is arranged on the base body and the mountings carrier in such a manner that they are able to form a positive-locking connection in an axial direction. For this purpose, the second contact surfaces are preferably aligned in an axial direction, and are turned towards each other. If the mountings carrier is connected to the base body by means of the rotary movement, the second contact surfaces do not lie next to each other, but feature a clearance from each other. Thus, the second contact surfaces act as overload protection for the spring element. Such an overloading may occur in particular if a user attempts to detach the mountings carrier from the base body not by means of a rotary movement, but incorrectly by means of a linear axial movement. This could deform the spring element beyond its elastic range, such that the mountings carrier would no longer be pulled closely adjacent to the base body. However, before such an overloading of the spring element occurs, the second contact surfaces impinge upon each other and, through the positive-locking fit that is thus formed in an axial direction, prevent a further axial removal of the mountings carrier from the base body.

In order to reduce production costs, it is advantageous if the first contact surface is formed on the spring element, in particular in the area of one of its free ends, and/or the first and/or second contact surface is formed on the connection element, in particular in the area of a first flank. The second contact surface can be produced easily, cost-effectively and/or in a space-saving manner if it is formed in the shape of a recess in the connection element. In addition, an overlap area for the second contact surfaces can be formed at the same time. The connection element advantageously features a first flank and a second flank, whereas the first flank is oriented against the direction of rotation of the opening roller, and the second flank is oriented in the direction of rotation of the opening roller. In order to ensure a solid positive-locking fit between the two connection elements in a circumferential direction, in particular against the direction of rotation, the recess is preferably formed in the area of the first flank of the connection element of the mountings carrier.

It is also advantageous if the spring element features at least one leg with spring action with one free end, and a locking shoulder is formed in the area of the free end; this locking shoulder is engaged in a locking edge of the base body and/or of the mountings carrier. Upon the engagement of the locking shoulder, the assembler advantageously receives acoustic and haptic feedback, such that he knows exactly when the mountings carrier is, in respect of the base body, in the correct angle position that will ensure a reliable locking of the mountings carrier in the base body. In addition, the interlocking locking shoulder and locking edge form a positive-locking fit and/or a force-locking fit in a circumferential direction, which prevents unintentional detachment of the screw cap, in particular upon the braking of the opening roller.

In an advantageous embodiment, the locking edge on the connection element is formed in a manner spaced from the first edge in a circumferential direction, in particular in the area of a second flank of the connection element corresponding to the spring element. Thus, the locking shoulder of the spring element then engages behind the locking edge, if the first contact surfaces lie next to each other as a positive-locking connection in a circumferential direction.

It is advantageous if the base body and/or the mountings carrier feature at least two, in particular multiple, connection elements, which are spaced from each other in a circumferential direction, in particular equidistantly. One spring element and/or one leg with spring action is/are allocated to each of these connection elements, such that they correspond to one another. Thereby, the connection elements can be formed in a space-saving manner, since the forces acting in a circumferential direction and an axial direction are evenly divided among all connection elements.

It is also advantageous if the spring element is formed in multiple parts, whereas, in particular, a spring element part is allocated to each of the corresponding connection elements. Thereby, advantageously, the area of the leg with spring action can be formed longer and thus softer, which is typically cheaper for clip applications.

It is also advantageous if the spring element features a riser slope, with which, upon assembly, the connection element first comes into contact during the rotary movement. This fosters a reliable locking of the locking shoulder behind the locking edge, since the connection element is guided through the riser slope. Furthermore, the tensioning of the spring, upon rotation inward, can take place through a flat angle, by which the torque required for the assembly of the mountings carrier on the base body is kept to a minimum.

It is also advantageous if the screw cap includes a positioning aid, by means of which, for the assembly of the two bodies, the two bodies are able to be positioned against each other in a disengaged position. Thereby, finding the correct assembly position, which corresponds to the disengaged position, is significantly easier. At the same time, damages to the securing element and to parts of the screw cap, in particular a locking device spring leg, which could arise upon an improper assembly, are avoided. At the same time, handling the opening roller during assembly is made easier, since the correct assembly position can be found more quickly.

According to an additional advantageous embodiment of the invention, a reinforcement element, preferably acting in an axial direction, is allocated to the locking element, in particular the locking device spring leg, or the securing element, in particular the securing device spring leg. It is particularly advantageous if a reinforcement element is allocated to at least the locking device spring leg, since, for the mountings carrier found in the engaged position, it can be protected from an improper disassembly in an axial direction. Likewise, such a reinforcement element for the locking device spring leg can also be protected from improper assembly, for instance if there is an attempt to assemble the mountings carrier on the base body with axial pressure, without the two parts having previously been positioned against each other in its correct assembly position. Thus, wear or damages of the locking device spring leg, which reduce the locking torque between the base body and the mountings carrier, can be avoided. For the same reason, it is therefore advantageous if a reinforcement element is allocated to the securing element.

According to a particularly advantageous embodiment of the invention, the positioning aid is arranged on the reinforcement element, whereas the reinforcement element preferably features one or more positioning openings as a positioning aid. Thereby, the mountings carrier and the base body may initially be brought together in an axial direction, whereas the reinforcement element protects the connection element and the securing element from damages, and transfer into the disengaged position through twisting against each other, in which a correct assembly is then possible. Preferably, the positioning openings are thereby formed for interacting with the connection element of the mountings carrier.

It is further advantageous if the reinforcement element is formed as a one-piece reinforcement plate, which features at least one first reinforcement area for at least one securing device spring leg and/or features at least one second reinforcement area for at least one locking device spring leg. In particular, if one or more securing device spring legs and one or more locking device spring legs are formed as one-piece leaf springs, such a one-piece reinforcement plate is advantageous.

In accordance with the invention, the open-end spinning device features at least one spin box, which includes an opening roller. The opening roller is formed in accordance with the previous description, whereas the specified characteristics may be present individually or in any combination.

Additional advantages of the invention are described in the following embodiments. The following is shown:

FIG. 1 a perspective view of an opening roller with a screw cap and a securing element,

FIG. 2 a perspective view of a base body of an opening roller with several locking device and securing device spring legs,

FIGS. 3a-3f a schematic representation of the screw cap upon twisting the mountings carrier in respect of the base body from a disengaged position into an engaged position and, from this, further into an end-layer locking position,

FIG. 4 an alternative embodiment of a securing device spring leg in a schematic representation, with an exit area formed in the area of the free end,

FIG. 5 an alternative embodiment of the locking device spring leg with an entry/exit opening,

FIG. 6 a perspective view of a base body of an opening roller with a positioning aid and a reinforcement element, along with

FIG. 7 a detailed view of the rotating cap from FIG. 6 with a reinforcement element.

FIG. 1 shows a perspective view of an opening roller 1 with a base body 2 and a mountings carrier 3 in a disengaged position. In this, the mountings carrier 3 can be removed from the base body 2 in an axial direction through movement along the axis of rotation A. With this embodiment, the mountings carrier 3 is formed in two pieces, which include a mountings holder 4 and a mountings ring 5. Alternatively, the mountings carrier 3 can be formed as one piece. The base body 2 is connected to a drive shaft 6 of the open-end spinning device in a torque-proof manner, and is centered on this. Moreover, the mountings carrier 3 is centered on the drive shaft 6. The drive shaft 6 is rotatably mounted in an intake 7.

The base body 2 and the mountings carrier 3 are detachably connected with one another by means of a screw cap 8. The screw cap 8 is formed as a quick-release fastener. Thereby, a quick assembly and disassembly of the mountings carrier 3 can take place. The screw cap 8 is formed in such a manner that the mountings carrier 3, by means of a rotary movement against the direction of rotation R of the opening roller 1 relative to the base body 2, can be detachably connected with this.

In the connected state, the mountings carrier 3 and/or the mountings holder 4 and the base body 2 are spring-loaded against each other by means of the screw cap 8 in such a manner that the mountings ring 5 between the two is essentially tensioned without clearance. This can avoid the build-up of fibers in the connection area between the base body 2 and the mountings ring 5 and/or between the mountings holder 4 and the mountings ring 5, which can lead to contaminants in the yarn upon detachment.

In FIG. 1, the mountings ring 5 is cut free in an angle interval, in order to make the screw cap 8 visible in this partial area. The screw cap 8 essentially includes a connection element and a locking element, which interlock in a bayonet-like manner, by which the mountings carrier 3 and the base body 2 are connected to one another in a positive-locking manner in the axial direction of the opening roller 1. With this embodiment, the connection element is formed as a hook-shaped connection element 9 on the mountings carrier 3, in particular on the mountings holder 4. In addition, the locking element is formed as a locking device spring leg 10 on the base body 2. As an alternative or in addition, it is also conceivable that the hook-shaped connection element 9 is formed on the base body 2, and the locking device spring leg 10 is formed on the mountings carrier 3, in particular on the mountings holder 4.

The locking device spring leg 10 includes a base 11, a free end 12 and a bending area 13 formed between them. The locking device spring leg 10 is formed as a spring, whereas, in the locking position of the mountings carrier 3 in respect of the base body 2 in an axial direction, it is bent in the direction of the mountings carrier 3 and/or the mountings carrier 4 in such a manner that the mountings ring 5 is tensioned in a spring-loaded manner between the mountings carrier 3 and the base body 2 (see FIG. 3f).

In accordance with FIG. 1, the locking device spring leg 10, in particular in the bending area 13, features a riser slope 14, on which the hook-shaped connection element 9, in particular with a spring contact surface 15, rises on the connection in such a manner that the locking device spring leg 10 is tensioned.

The locking device spring leg 10, in particular in the area between the free end 12 and the bending area 13, also includes a locking shoulder 16. This corresponds to the locking edge 17 of the hook-shaped connection element 9, such that the mountings carrier 3 is detachably held in respect of the base body 2 in the end-layer locking position with a spring force that is thereby defined. The locking edge 17 is formed on the hook-shaped connection element 9 at its second flank 19 turned away from the locking device spring leg 10. Thereby, the connection element 9 is pressed against a circumferential stop 21 of the base body 2 with a stop 20 formed at its first flank 18 (see FIG. 3f).

For detaching the mountings carrier 3, the spring force threshold defined by the locking device spring leg 10 must be overcome, in order to be able to disengage the locking edge 17 from the locking shoulder 16. During operation, this spring force threshold is not exceeded by the rotation forces that thereby arise, such that, during operation, the mountings carrier 3 is securely locked in the locking position in respect of the base body 2.

Through wear and/or material fatigue, it may occur that the hook-shaped connection element 9 is no longer properly held by the locking device spring leg 10 in the locking position, in which the locking edge 17 usually engages behind the locking shoulder 16 in such a manner that the stop 20 of the connection element 9 lies on the circumferential stop 21 (see FIG. 3f). Instead of this, the connection element 9 would slide from the locking position into the engaged position, in which the locking device spring leg 10 and the connection element 9 are still always interlocking in a positive-locking manner, but there is a risk that the connection element 9 slides from this engaged position further into the disengaged position. Thereby, during operation, the mountings carrier 3 could be uncontrollably detached from the base body 2. As an alternative to this, it is also conceivable that the mountings carrier 3 was, upon assembly, not properly rotated into the locking position, but only up to the engaged position, whereas, in such a case, an uncontrolled detachment of the mountings carrier 3 from the base body 2 could be the consequence.

As a result of this, in accordance with FIG. 1, the opening roller 1 features a securing element, which with this embodiment is preferably formed as a securing device spring leg 23. Such securing device spring leg 23 serves the purpose of securely holding the hook-shaped connection element 9 in the engaged position during operation. For this purpose, it is held in a secured position with a defined spring force. In order to rotate the connection element 9 and/or the mountings carrier 3 in respect of the locking device spring leg 10 and/or the base body 2 around the axis of rotation A from the engaged position into the disengaged position, this spring force threshold must be overcome by an operator.

The securing device spring leg 23 features a base 24 and a free end 25. A bending area 26 is formed between these two. The securing device spring leg 23 formed as a spring is able to move between the secured position and an open position. In the secured position, a twisting of the mountings carrier 3 from the engaged position into the disengaged position is avoided. In the open position, a twisting of the mountings carrier 3 from the disengaged position into the engaged position for assembly, and from the engaged position into the disengaged position for disassembly, is enabled.

The securing device spring leg 23 also includes a riser slope 27. This corresponds to a contact area 28 of the connection element 9. The contact area 28 is preferably formed in the area of the front side 22 and/or the second flank 19 of the connection element 9. With this embodiment, the contact area 28 is formed as an edge, preferably between the front side 22 and the second flank 19. However, in an alternative embodiment, a point-shaped or surface-shaped contact area 28 is conceivable.

Moreover, an overload stop 29 is allocated to the securing device spring leg 23. This serves the purpose of avoiding a plastic deformation of the securing device spring leg 23 upon a movement of the securing device spring leg 23 from the secured position into the open position. In the secured position of the securing device spring leg 23, the overload stop 29 is arranged in a manner spaced from such position, in particular from its side turned away from the riser slope 27.

FIG. 2 shows a perspective view of the base body 2. It is clear from this that the screw cap 8 features three engaged areas formed in accordance with the preceding description. The locking device spring legs 11a, 11b, 11c and the securing device spring legs 23a, 23b, 23c are formed as a one-piece leaf spring 30. However, in an alternative embodiment not shown here, each of the locking device spring legs 11a, 11b, 11 c and each of the securing device spring legs 23a, 23b, 23c are formed as one unit. Thus, advantageously, the properties of the spring steel can be optimally adapted to the respective requirements of the locking device spring legs 11a, 11b, 11c and/or the securing device spring legs 23a, 23b, 23c.

FIGS. 3a-3f show a simplified, schematic representation of the screw cap 8 upon twisting the mountings carrier 3 in respect of the base body 2 from a disengaged position into an engaged position and, from this, further into an end-layer locking position. With this embodiment, the mountings carrier 3 is reduced to a single hook-shaped connection element 9. In addition, the base body 2 has been simplified on a securing device spring leg 23, a locking device spring leg 10 and a stop element 31.

FIG. 3a shows the screw cap 8 in the disengaged position at the beginning of assembly. Thereby, there is no positive-locking connection between the mountings carrier 3 and the base body 2 in the axial direction of the opening roller. The securing device spring leg 23 and the locking device spring leg 10 are unburdened, whereas the securing device spring leg 23 is found in the secured position. The hook-shaped connection element 9 lies in the area of its first flank 18 in a circumferential direction on the base 11 of the locking device spring leg 10, and in an axial direction with its contact area 28 on the riser slope 27 of the securing device spring leg 23, such that the mountings carrier 3 cannot be twisted in respect of the base body 2.

For assembling the mountings carrier 3 on the base body 2, the mountings carrier 3 must be initially presses in an axial direction in the direction of the base body 2. Thereby, the force applied by the operator must exceed the spring force threshold of the securing device spring leg 23, such that the free end 25 of the securing device spring leg 23 and/or the bending area 26 is/are able to be pressed from the secured position shown in FIG. 3a into the open position shown in FIG. 3b. As soon as the securing device spring leg 23 reaches its open position, the mountings carrier 3 and/or the connection element 9 can be twisted in respect of the base body 2, whereas the connection element 9 grips into the locking device spring leg 10 in a positive-locking manner, such that a positive-locking connection is formed between the mountings carrier 3 and the base body 2 in the axial direction of the opening roller (see FIG. 3b).

Given the spring-action design of the securing device spring leg 23, it once again independently moves back into the secured position as soon as the axial force applied by the operator is less than the spring force threshold of the securing device spring leg 23. Thereby, in addition to the force applied by the operator in a circumferential direction, the connection element 9 is pushed into the engaged position in accordance with FIG. 3c.

In FIGS. 3c, 3d, and 3e, the screw cap 8 is shown in the various phases of the engaged position. In such engaged position, there is a positive-locking connection with clearance in an axial direction between the mountings carrier 3 and the base body 2; however, the mountings carrier 3 is not yet locked in respect of the base body 2 in a circumferential direction. However, the securing device spring leg 23 that once again independently moves into the secured position prevents the connection element 9 from being able to independently move from the engaged position into the disengaged position during operation, if the mountings carrier 3 had been, prior to this, not properly rotated into the locking position in accordance with FIG. 3f, or it had independently moved from the locking position into the engaged position, due to a technical failure of the locking device spring leg 10. Thus, the connection element 9 can once again move back into the disengaged position shown in FIG. 3a only through the overcoming of the spring force threshold of the securing device spring leg 23.

For the proper locking of the screw cap 8, this must be rotated in a circumferential direction up to the stop. Thus, in accordance with FIG. 3d, there is a clearance in an axial direction in the first phase of the engaged position between the connection element 9 and the base body 2, in particular its stop element 31 and locking device spring leg 10. Only if the mountings carrier 3 in accordance with FIG. 3e is further rotated in respect of the base body 2 will the spring contact surface 15 of the connection element 9 come into contact with the riser slope 14 of the locking device spring leg 10. Thereby, the locking device spring leg 10 is tensioned such that it pushes the connection element 9 in an axial direction against the stop element 31 of the base body 2.

As soon as the hook-shaped connection element 9 in accordance with FIG. 3f has passed the locking shoulder 16 of the locking device spring leg 10, the locking edge 17 engages behind the locking shoulder 16. Thereby, the connection element 9, with its stop 20, is pressed in a circumferential direction against the circumferential stop 21 of the stop element 31. In this locking position, the mountings carrier 3 is securely connected to the base body 2.

In order to disassemble the mountings carrier 3, this must be twisted in respect of the base body 2 in such a manner that this is initially moved from the locking position in accordance with FIG. 3f into the engaged position in accordance with FIGS. 3e to 3c. For this purpose, the operator must overcome the spring force threshold of the locking device spring leg 10, such that the locking edge 17 of the connection element 9 slides through the locking shoulder 16 of the locking device spring leg 10. In this engaged position in accordance with FIGS. 3c to 3e, the connection element 9 is then securely held by means of the securing device spring leg 23. For the final release of the mountings carrier 3 from the base body 2, it should be rotated further, until its contact area 28 in accordance with FIG. 3c comes into contact with the riser slope 27 of the securing device spring leg 23. Based on the riser slope 27, the connection element 9 can tilt the free end 25 and/or the bending area 26 from the secured position into the open position in accordance with FIG. 3b. For this purpose, the spring force threshold of the securing device spring leg 23 must be overcome. Thus, an independent detachment of the connection element 9 during operation is ruled out to the greatest possible extent. As soon as the connection element 9 in accordance with FIG. 3a is rotated into the disengaged position, the securing device spring leg 23 automatically moves back into the secured position, and the mountings carrier 3 can be removed from the base body 2.

FIG. 4 shows an alternative embodiment of the screw cap 8 with a securing device spring leg 23, which features an exit area 32 in the area of its free end 25. Preferably, this exit area 32 is formed as a curvature. Thereby, an improved sliding out upon the disassembly of the connection element 9 is fostered.

Similar to the embodiment shown in FIGS. 3a-3f, the riser slope 27 of the securing device spring leg 23 is inclined in respect of the base 24 by an angle α in the direction of the base body 2. The spring force threshold is defined by the material properties of the securing device spring leg 23 and its bending area length and inclination; this threshold must be overcome to move the connection element 9 from the engaged position into the disengaged position. In accordance with FIG. 4, the exit area in respect of the base 24 is inclined by an angle β in the direction of the base body 2. The angle α is formed in a manner smaller than the angle β.

FIG. 5 shows an alternative embodiment of the locking device spring leg 10. Similar to the previous embodiments, the contour of the first flank 18 of the connection element 9 is formed identically to the flank 34 of the locking device spring leg 10 in the area of the base 11. This can define an exact engaged position of the connection element 9 in respect of the locking device spring leg 10.

However, in contrast to the previous embodiment, the locking device spring leg 10 shown in FIG. 5 features an entry/exit opening 33. This is formed in the area of the base 11, and serves the purpose of the entry and exit of the hook-shaped connection element 9. It is advantageous if the entry/exit opening 33 is only slightly larger than the corresponding hook-shaped connection element 9, as this can also reduce the risk that the connection element 9 moves from the engaged position into the disengaged position during operation. As such, the probability is rather low that, with such a twisting, the locking element 9 comes to lie exactly in the area of the entry/exit opening 33. Instead of this, it is to be expected that this twists beyond the entry/exit opening, and comes to lie in the end of the base 11 turned away from the bending area 13. In this position, there would still be a positive-locking connection between the connection element 9 and the locking device spring leg 10, such that the mountings carrier 3 cannot be detached from the base body 2 in an axial direction.

FIG. 6 shows a perspective view of a base body 2, which is also equipped with a positioning aid 36 and a reinforcement element 35. In addition, the base body 2 with the locking device spring legs 10 and the securing device spring legs 23 essentially corresponds to that depicted in FIG. 2, such that reference is made to the statements regarding the previous figures. Therefore, the following addresses only the differences between the embodiments shown therein.

With this embodiment, the locking device spring legs 10, in turn numbering three here, and the securing device spring legs 23, likewise three here, are also formed in the shape of a one-piece leaf spring 30. The leaf spring 30 is covered by a reinforcement element 35 formed as a one-piece reinforcement plate. The reinforcement element 35 at the same time includes a positioning aid 36, by means of which the mountings carrier 3 can be twisted in respect of the base body 2 into the disengaged position, in order to enable a proper assembly. With this embodiment, the positioning aid 36 includes three positioning openings 36a, which are formed as radial sections from the reinforcement element 35. Thereby, the positioning openings 36a are accurately allocated to the disengaged position, and are adapted to the dimensions of the connection elements 9 of the mountings carrier 3, and work together with the two bodies 2, 3 for the correct positioning of them. Therefore, for assembly, the mountings carrier 3 may be easily set on the base body 2 in an axial direction and subsequently twisted, until the connection elements 9 slide nearly automatically into the positioning openings 36a. Thereby, the base body 2 and the mountings carrier 3 are then positioned next to each other in the disengaged position, which corresponds to the correct assembly position, and can be joined together by further axial pressure in the manner already described.

Even if a particularly advantageous embodiment is shown in the present case, in which the positioning aid 36 is formed on the reinforcement element 35, it is nevertheless possible to form the positioning aid 36 separately from one or more reinforcement elements 35. Furthermore, the positioning aid 36 also need not necessarily be formed as a positioning opening 36a; rather, it may also easily include a positioning stop or the like.

With this embodiment, the reinforcement element 35 is formed as a reinforcement plate made of a sheet material, and in an axial direction counteracts both faulty assembly forces and faulty disassembly forces. A faulty assembly or disassembly is present if, for the assembly process or disassembly process, the base body 2 and the mountings carrier 3 are moved against each other in an axial direction, but are not positioned next to each other in their disengaged position. Thereby, the reinforcement element 35 features three initial reinforcement areas 35a, each of which are allocated to the securing device spring legs 23, and cover these on the side turned away from the mountings carrier 3. If a faulty assembly of the opening roller 1 is then attempted, damages to the securing device spring leg 23, or a bending of the securing device spring leg 23, are prevented by the reinforcement element 35 or the reinforcement area 35a.

The reinforcement element 35 also features three reinforcement areas 35b, which cover at least the base 11 of the locking device spring leg 10. With this embodiment, the second reinforcement areas 35b extend across the overall length of the locking device spring leg 10. Thereby, as previously described for the securing device spring leg 23, the locking device spring leg 10 is protected from damages in the event of improper assembly. The reinforcement element 35 also reinforces the locking device spring leg 10, if the mountings carrier 30 is located in the engaged position and, directly from the engaged position, an improper disassembly in an axial direction is attempted. The bending of and any damages to the locking device spring leg 10 are thereby prevented by the fact that it contacts the connection element 35 rearward, and thus its further tilting is prevented. As an alternative to the one-piece reinforcement plate shown with this embodiment, it would naturally also be conceivable to allocate at least one dedicated reinforcement element 35 to each of the locking device spring legs 10.

As can be further seen from FIG. 6, with this embodiment, the reinforcement element 35 features additional radial sections, which form an assembly aid 38 in order to properly position the reinforcement element 35 in respect of the base body 2 during its assembly. With this embodiment, the assembly aid 38 and/or the further radial recesses work together with the circumferential stops 21 of the base body 2. In the same manner, the contour of the base 24 of the securing device spring leg 23 can also be formed in such a manner that, with the circumferential stop 21, it may in the same manner form an assembly aid 38, as previously described for the reinforcement element 35. Thereby, the leaf spring 30 along with the reinforcement element 35 may be set up at the drive shaft 6 in a simple manner, and may be properly positioned with the assistance of the circumferential stops 21.

Furthermore, the reinforcement element 35 may feature additional through openings 39, in order to enable, for example, access to a bearing also not shown here, or other internal components of the base body 2, or to perform additional functions. In order to facilitate the transfer of the base body 2 and the mountings carrier 3 from the disengaged position into the engaged position and vice versa, it is advantageous if the reinforcement element 35 has a reduced reinforcement effect at least in the area of the base 11 of the locking device spring leg 10. With this embodiment, for this purpose, one of the through openings 39 is placed in such a manner that the reinforcement area 35b for the locking device spring leg 10 is weakened in the area of the base 11, and only a thin bridge 37 remains. This allows the reinforcement element 35 to yield its spring action in an axial direction, in order enable this to twist.

FIG. 7 finally shows a detailed representation of the screw cap 8, at which the mountings carrier 3 with the connection elements 9 is found in the disengaged position in respect of the base body 2. As already described for the embodiment of FIG. 5, with its contour, the first flank 18 of the connection element 9 is formed identically to the flank 34 of the locking device spring leg 10. As described, this defines an exact engaged position of the connection element 9 in respect of the locking device spring leg 10. In the same way, with its contour, the flank 40 of the reinforcement element 35 turned away from the connection element 9 in the disengaged position is then adjusted to the flank 18 of the connection element 9, such that this effect is still reinforced here.

The connection element 9 may also be formed on the basis of the reinforcement element 35, since the stop 20 of the connection element 9 may then be formed directly through the flank 18. Wear on the contact point of the flanks 18, 34 and 40 may be reduced on the basis of the flat arrangement of the flank 18 of the connection element 9 on the flank 34 of the locking device spring leg 10 and, where appropriate, on the flank 40 of the reinforcement element 35. This also contributes to an increase in the locking torque between the base body 2 and the mountings carrier 3.

The invention is not limited to the illustrated and described embodiments. Variations within the framework of the patent claims, such as a combination of characteristics, are also possible, even if they are presented and described in different embodiments. Accordingly, the mountings carrier may feature all previously described characteristics of the base body, individually or in any combination, as an addition or as the alternative. The same applies to the base body in a reverse manner.

LIST OF REFERENCE SIGNS

• 1 Opening rover
• 2 Base body
• 3 Mountings carrier
• 4 Mountings holder
• 5 Mountings ring
• 6 Drive shaft
• 7 Intake
• 8 Screw cap
• 9 Hook-shaped connection element
• 10 Locking device spring leg
• 11 Base of the locking device spring leg
• 12 Free end of the locking device spring leg
• 13 Bending area of the locking device spring leg
• 14 Riser slop of the locking device spring leg
• 15 Spring contact surface
• 16 Locking shoulder
• 17 Locking edge
• 18 First flank
• 19 Second flank
• 20 Stop of the connection element
• 21 Circumferential stop
• 22 Front side
• 23 Securing device spring leg
• 24 Base of the securing device spring leg
• 25 Free end of the securing device spring leg
• 26 Bending area of the securing device spring leg
• 27 Riser slope of the securing device spring leg
• 28 Contact area
• 29 Overload stop
• 30 One-piece leaf spring
• 31 Stop element
• 32 Exit area
• 33 Entry/exit opening
• 34 Flank of the locking device spring leg
• 35 Reinforcement element
• 35a First reinforcement area for the securing device spring leg
• 35b Second reinforcement area for the locking device spring leg
• 36 Positioning aid
• 36a Positioning openings
• 37 Bridge
• 38 Assembly aid
• 39 Through openings
• 40 Flank of the reinforcement element
• A Axis of rotation
• R Direction of rotation

Claims

1. Opening roller (1) for an open-end spinning device with a base body (2),

which is detachably connected to a mountings carrier (3) by means of a screw cap (8),

whereas the mountings carrier (3) for connecting to the base body (2) in respect of this is rotatable around an axis of rotation (A) from a disengaged position into an engaged position and, from this, further into an end-layer locking position,

characterized in that,

the screw cap (8) includes at least one securing element (23),

which prevents the mountings carrier (3) from, during operation, moving in respect of the base body (2) from the engaged position into the disengaged position.

2-15. (canceled)