Abstract: Disclosed is a sewing arm mechanism of an embroidery machine. Within the sewing arm mechanism, there are provided a needle bar vertical drive unit and cloth pressing member vertical drive unit for vertically moving a needle bar and a cloth pressing member, respectively, by using the rotational driving force of an upper shaft. The sewing arm mechanism is configured in such a manner that the needle bar drive reaction force exerted on the upper shaft by the driving the needle bar vertical drive unit, and the cloth pressing member drive reaction force exerted on the upper shaft by the driving of the cloth pressing member vertical drive unit act in opposite directions of each other, whereby the magnitudes of the reaction forces exerted on the upper shaft can be cancelled with each other.

Abstract: A presser foot drive structure of an embroidery machine, by which a vertically movable presser foot for preventing a sheet of cloth to be sewn from rising in a sewing operation is vertically moved inside a sewing head. The presser foot drive structure includes a presser foot drive holder, which is vertically slidable and is mounted on the outer circumference of a needle bar, which is vertically driven; a presser foot drive shaft, which is disposed parallel to the needle bar via the presser foot drive holder; and the presser foot, which is disposed at the lower end of the presser foot drive shaft and vertically reciprocates. It is possible to reduce the stroke of a presser foot so that it is smaller than that of a needle bar, enhance the supporting force for a needle bar, and reduce the shaking of a presser foot.

Abstract: An embroidery machine includes a sewing arm having an upper shaft for providing a driving force, a needle bar support case, which is assembled to a front portion of the sewing arm so as to be laterally movable, a needle bar provided in a needle bar support case, the needle bar having a needle at a lower end thereof and vertically carrying the needle using a rotation driving force of the upper shaft, and a presser foot, which is provided in the needle bar support case so as to be vertically movable, characterized in that each of the needle bar and the presser foot is operated by an individual drive mechanism. The presser foot is separately driven by its own drive source, independent of the drive source of the needle bar.

Abstract: A clutch structure for a presser foot in an embroidery sewing machine is provided. The clutch structure includes a guide member, to which the presser foot drive link is rotatably connected, and through which the needle bar guide shaft passes, a spring connecting member mounted on the outer circumference of the needle bar guide shaft and inside the guide member, a resilient member mounted on the outer periphery of the spring connecting member, and a pivot member mounted inside the guide member so as to be pivotable around the needle bar guide shaft within a certain angular range by the height adjusting mechanism and the resilient member. Upon a head-interval adjusting operation, the unnecessary driving of the presser foot is prevented, so that the occurrence of vibrations and noise as well as the unnecessary wear of a needle bar, a presser foot support, and a presser foot holder can be prevented.

Abstract: Disclosed are a rack and pinion type power transmission and a driving apparatus of an embroidery frame of an embroidery machine having the same. The gear teeth, which are engaged with the engaging member connected to the power source, are formed in the lower side of the a single movable frame, to which the embroidery frame is fixed, so as to directly move the movable frame, so that uniform driving force is transmitted to the embroidery frame during the movements of the embroidery frame. Thus, the high reliable and steady movement is performed. The driving apparatus includes any one of the X- and Y-directional movement mechanisms. The mechanism includes a fixed frame installed to a beam-body of the sewing machine, a movable frame movably installed on the fixed frame and having gear teeth, and a movable frame movement mechanism engaged with the gear teeth to reciprocate the movable frame.

Abstract: Disclosed is a driving apparatus of an embroidery frame of a sewing machine in which a driving unit of a sewing frame reciprocates on an X- and/or Y-axis fixed frames, installed to a beam-body of the sewing machine so that a uniform driving force can be transmitted to the embroidery frame, inferior embroidery caused by vibration can be prevented, a size of the sewing machine is reduced, and a high-speed operation is enabled. The apparatus includes an embroidery frame driving unit having the embroidery frame to fix an object and placed on a table of the sewing machine, and a Y-directional movement mechanism to move the frame driving unit in the Y-direction. The Y-directional movement mechanism includes a fixed frame having gear teeth, and an embroidery frame driving unit installed on the fixed frame engaged with the gear teeth to reciprocate the frame driving unit in the Y-direction.

Abstract: A clutch structure for a presser foot in an embroidery sewing machine is provided. The clutch structure includes a guide member, to which the presser foot drive link is rotatably connected, and through which the needle bar guide shaft passes, a spring connecting member mounted on the outer circumference of the needle bar guide shaft and inside the guide member, a resilient member mounted on the outer periphery of the spring connecting member, and a pivot member mounted inside the guide member so as to be pivotable around the needle bar guide shaft within a certain angular range by the height adjusting mechanism and the resilient member. Upon a head-interval adjusting operation, the unnecessary driving of the presser foot is prevented, so that the occurrence of vibrations and noise as well as the unnecessary wear of a needle bar, a presser foot support, and a presser foot holder can be prevented.

Abstract: An embroidery machine includes a sewing arm having an upper shaft for providing a driving force, a needle bar support case, which is assembled to a front portion of the sewing arm so as to be laterally movable, a needle bar provided in a needle bar support case, the needle bar having a needle at a lower end thereof and vertically carrying the needle using a rotation driving force of the upper shaft, and a presser foot, which is provided in the needle bar support case so as to be vertically movable, characterized in that each of the needle bar and the presser foot is operated by an individual drive mechanism. The presser foot is separately driven by its own drive source, independent of the drive source of the needle bar.

Abstract: Disclosed is a driving apparatus of an embroidery frame of a sewing machine in which a driving unit of a sewing frame reciprocates on an X- and/or Y-axis fixed frames, installed to a beam-body of the sewing machine so that a uniform driving force can be transmitted to the embroidery frame, inferior embroidery caused by vibration can be prevented, a size of the sewing machine is reduced, and a high-speed operation is enabled. The apparatus includes an embroidery frame driving unit having the embroidery frame to fix an object and placed on a table of the sewing machine, and a Y-directional movement mechanism to move the frame driving unit in the Y-direction.

Abstract: Disclosed is a sewing arm mechanism of an embroidery machine. Within the sewing arm mechanism, there are provided a needle bar vertical drive unit and a cloth pressing member vertical drive unit for vertically moving a needle bar and a cloth pressing member, respectively, by using the rotational driving force of an upper shaft. The sewing arm mechanism is configured in such a manner that the needle bar drive reaction force exerted on the upper shaft by the driving of the needle bar vertical drive unit, and the cloth pressing member drive reaction force exerted on the upper shaft by the driving of the cloth pressing member vertical drive unit act in opposite directions of each other, whereby the magnitudes of the reaction forces exerted on the upper shaft can be cancelled with each other.

Abstract: Disclosed are a rack and pinion type power transmission and a driving apparatus of an embroidery frame of an embroidery machine having the same. The gear teeth, which are engaged with the engaging member connected to the power source, are formed in the lower side of the a single movable frame, to which the embroidery frame is fixed, so as to directly move the movable frame, so that uniform driving force is transmitted to the embroidery frame during the movements of the embroidery frame. Thus, the high reliable and steady movement is performed. The driving apparatus includes any one of the X- and Y-directional movement mechanisms. The mechanism includes a fixed frame installed to a beam-body of the sewing machine, a movable frame movably installed on the fixed frame and having gear teeth, and a movable frame movement mechanism engaged with the gear teeth to reciprocate the movable frame.

Abstract: Disclosed is a stepped embroidery machine. The stepped embroidery machine includes a plurality of head units including heads, embroidery frames installed at lower portions of the heads is such a manner that the embroidery frames are movable in X-axis and Y-axis directions, X-axis drive units for moving the embroidery frames in an X-axis direction, and Y-axis drive units for moving the embroidery frames in a Y-axis direction, a control unit for controlling an operation of the head units, and a control panel used for inputting and displaying information related to embroidery work and embroidery. The head units are individually driven per each head unit and aligned in a stepped pattern while forming a predetermined step difference therebetween. Since the head units are individually driven, it is possible to individually perform embroidery work with respect to various workpieces.

Abstract: A sequin device which is mounted on a side portion of a head of a sewing machine in order to draw a sequin from a sequin roll and place the sequin on an object to be sewn while performing a cutting operation with respect to the sequin is disclosed. The sequin device can stably feed a sequin from a sequin roll provided on a support plate with a simple structure and simplify the manufacturing process and reduce manufacturing costs thereof.

Abstract: Disclosed is a cap holding device for an embroidery machine capable of easily mounting a cap while securely supporting the cap and improving workability and productivity. The cap holding device has a holding member for mounting the cap thereon, a pressing member detachably coupled to the holding member so as to maintain the cap in the holding member, and at least one fixing part formed at one end or both ends of the pressing member and fixed to the holding member.

Abstract: An embroidery machine can simultaneously embroider sewing objects having various shapes, including a flat object, an object having a shape of a usual processed cloth, an object having a shape of a cap, etc. The embroidery machine comprises a plurality of sewing heads grouped into at least two working groups, and the embroidering frames, each of which is arranged for one of the working groups. The embroidering frames have structures either identical to each other or different from each other. Therefore, one conventional embroidery machine can simultaneously embroider more than one kind of sewing objects, including at least two of a flat sewing object, a tubular sewing object, and a cap-shaped sewing object.

Abstract: A head control device and its control method for a multi-head embroidery machine having a plurality of heads are disclosed. The present invention provides a head control device and its control method for a multi-head embroidery machine having a plurality of heads. The head control device comprises a central control unit controlling a whole system, the central control unit outputs a control signal for controlling a drive state of the respective head in response to an operation of an operator, so that the plurality of heads are selectively driven, and a embroidery task is performed by the selected head; and at least one head control unit for controlling the drive state of the respective head in response to the control signal from the central control unit.

Abstract: Disclosed is an apparatus for driving an embroidery frame of a multi-headed embroidery machine having a plurality of heads. Linear motors, for driving the embroidery frame in a direction of X-axis or Y-axis, are subdivided by their capacities so that they can be wired externally to prevent the deflection of the embroidery frame. The plurality of linear motors can be controlled simultaneously by means of a driver and a linear scale.

Abstract: Disclosed is a cap holding device for an embroidery machine capable of easily mounting a cap while securely supporting the cap and improving workability and productivity. The cap holding device has a holding member for mounting the cap thereon, a pressing member detachably coupled to the holding member so as to maintain the cap in the holding member, and at least one fixing part formed at one end or both ends of the pressing member and fixed to the holding member.

Abstract: Disclosed are an apparatus for controlling a position of an embroidery frame, which is capable of performing an accurate embroidering operation by feed backing a position error due to mutual operations of interlocking devices for driving the embroidery frame using a displacement sensor for sensing a displacement of the embroidery frame, and a method thereof. The apparatus comprises an X-axis driver, a Y-axis driver, a sensor and a controller. The X-axis driver moves the embroidery frame along an X-axis direction. The Y-axis driver moves the embroidery frame along a Y-axis direction. The sensor senses a displacement of the embroidery frame to the X-axis and Y-axis directions, and outputs electric signals corresponding to the sensed displacement. The controller generates X-axis and Y-axis drive control signals based on the electric signal from the sensor in order to control the X-axis and Y-axis drivers, respectively.