Abstract: A securing device for securing a component to an object comprises a fastening element having an engagement section and having a longitudinal axis, wherein the fastening element is selectively connectable to a counter element by actuating the engagement section; and a cover sleeve which is movably supported at the fastening element between a closed position in which the cover sleeve prevents an actuation of the engagement section and an open position in which the cover sleeve allows an actuation of the engagement section. At least one blocking element is provided between the fastening element and the cover sleeve, said blocking element being freely movable in the closed position of the cover sleeve between a latched position in which it blocks the cover sleeve in the closed position and an unlatched position in which it allows a movement of the cover sleeve into the open position.

Abstract: Disclosed is a multiple cast-in insert apparatus for concrete, including a supporting body fixed to a plate material configured to pour the concrete and having a first screw formed along an inner circumferential surface of a hollow coupling hole formed therein to pass therethrough; a lifting body including a coupling part having a second screw thread formed on an outer circumferential surface thereof to be screwed with the first screw thread and thus to be selectively moved up and down through the hollow coupling hole and also having an anchor coupling hole formed therein, and a leveling support part integrally formed along an upper edge of the coupling part to protrude outward in a radial direction; and a spacer body disposed above the supporting body and having a coupling through-hole formed therein so that the coupling part passes therethrough.

Abstract: A threaded connector for securing a panel member to a structure and for adjusting the position of the panel member relative to the structure. The connector comprises an elongate one-piece stud, a first spacer, a threaded nut, a second spacer and a turning formation. The connector permits the panel member to be mounted on the stud and the stud to be rotated to adjust the position of the panel member relative to the structure.

Abstract: A threaded post structure includes a first threaded post, a second threaded post and a positioning component. The first threaded post has a first internal thread and an external thread. The second threaded post has a second internal thread and at least two positioning portions. The first threaded post and the second threaded post are screwed with each other along an axis through the external thread and the second internal thread. The positioning component is disposed on the first threaded post. When the second threaded post moves to a position along the axis, the positioning component positions one positioning portion to fix the second threaded post at the position. When the second threaded post moves to another position along the axis, the positioning component positions another positioning portion to fix the second threaded post at the another position. Besides, an assembling structure having the threaded post structure is also provided.

Abstract: A clip for facilitating installation of foam insulation boards in a building structure. The clip comprises a body, a spacer and a foot for holding the insulation board, and a connection region for attachment of the clip to a building structural member. The clip is designed to ensure proper ventilation and greatly easy the proper installation of rigid foam insulation.

Abstract: In certain embodiments, a mounting apparatus includes one or more standoffs adapted to maintain two panels at a spaced apart distance from one another. The standoff includes a first end having a first threaded fastening member and a second end having a cavity in which a torque restraining member is disposed. The torque restraining member is coupled to a second threaded fastening member. The relative sizes of the torque restraining member and the cavity allow movement of the torque restraining member within the cavity.

Abstract: A standoff adaptor for a threaded hollow wall anchor for mounting an item to a wall. A threaded member has a washer mounted thereon with a recess to receive and contact the head of a mounting anchor. The distal end of the threaded member is received into a standoff having at its opposite end a bolt threadedly mounted thereto for holding an item between the bolt and standoff.

Abstract: The present invention relates to a fastening element with a tolerance-compensation function for fastening add-on elements, in particular roof rails. To this end, a threaded bolt is provided which has a threaded region, a fastening region and a projection. A positioning and assistance element is supported on the protection, and an adjustment element is arranged in the threaded region. An add-on element is arranged on the fastening region. A space between a first and a second component can be compensated for with the aid of the positioning and assistance element in cooperation with the adjustment element. Furthermore, a fastening means is arranged on the threaded region, with the result that the second component is arranged between the adjustment element and the fastening means. The add-on element is fixedly connected to the second component by means of the fastening element in this way.

Abstract: A standoff adaptor for a push pin. A spacer has a hole formed in one end to complementarily receive a push pin with the pin of the push pin extending outwardly therefrom. A head is threadedly mounted to the opposite end of the spacer and may be adjusted to tightly grip an item between a spacer and head.

Abstract: Threaded connectors for securing a structure such as a post or pole to a support are disclosed. In one embodiment, an anchor has a passageway that is threaded for at least a portion of its length. An elongate connecting member has a relatively wide central section and threaded first and second sections extending from opposite sides of the central section. The first section is threadable into the passageway to secure the connecting member to the anchor. The connecting member is formed with a turning formation at its outer end so that it can be engaged with a turning tool in order to thread the connecting member into or out of the passageway. A nut is part of the connector and can be threaded onto the second section in order to secure the structure. Another version of the connector has a flanged nut having a flange spaced from the outer end of the nut, which is threadable onto a threaded connecting member.

Abstract: The present invention encompasses an arrangement for resilient fixing and where the arrangement (3) is intended to be able to be fixedly anchored in a first, for instance a fixed and bearing, construction (1) and in such a fixedly anchored position be able to retain a second, for instance a laterally related and/or sub-oriented, construction (2), where the arrangement (3) displaying a first part portion (3a) for instance provided with a helical thread, cooperable with the first construction (1) and a second part portion (3b) for instance provided with a helical thread, cooperable with the second construction (2). The first part portion (3a) and the second part portion (3b) are, via a rod-shaped device (3c), to be coordinated with one another, while spring means (4), for instance a helical spring unit (4a) is to be adapted, by tractive or compressive force to resiliently retain said second construction (2) at an adapted distance (“D”) from said first construction (1).

Abstract: The invention relates to a device for connecting two electrical conductors (4, 5), comprising a metallic clamp (1) that is designed as a pipe section and that comprises in the wall thereof at least two through holes provided with a thread for receiving clamping screws (2) provided with an external thread. In the pipe section of the clamp (1), at least one central through hole provided with a thread is furnished between the two through holes in order to receive a fixing screw (3) provided with an external thread, wherein the fixing screw has a tapered, approximately wedge-shaped tip (11), which, in the assembled position, lies rigidly against the end faces of the two conductors (4, 5) inserted into the pipe section. The tip (11) provided with an external thread is screwed into a hole (10) of the fixing screw (3) provided with an internal thread, and the external thread of the tip (1) runs opposite to the external thread of the fixing screw (3).

Abstract: Adjustable bushing assemblies for mounting panels to a support surface include an upper bushing and a lower bushing. The upper bushing is configured to be secured to the lower bushing and prevent over tightening of a fastener secured through the upper and lower bushings. In addition, systems of at least one implementation of the present invention include a plurality of panels mounted to one or more support surfaces using one or more adjustable bushing assemblies.

Abstract: A mounting device for a screw including a head and a tip, the mounting device comprising a body and a plunger. The body is attachable to the head of the screw, and the plunger is adapted to extend from within the body upon receiving a downward force. Additionally, the plunger includes a plurality of knurls adapted to transfer torque to the tip of the screw.

Abstract: A screw assembly includes hollow first screw and a second screw smaller than the first screw in size. A first thread is defined on an outer surface of the first screw. A receiving hole is defined in the first screw. The second screw is adapted to be received in the receiving hole to engage with the first screw.

Abstract: A fastening apparatus for fastening a component B to a component A enables an automatic compensation of tolerances in the separation distance between the two components. The apparatus consists of a receiving element 2, which can be fixed on the component A, an adjustment element 4, which can be screwed to the receiving element via a first thread pairing 28, 48 of a first thread direction, and a fastening screw 6, which can be screwed into the receiving element 2 via a second thread pairing 54, 56 of the opposite thread direction and can be connected with the adjustment element 4 via a detachable drag connection 46, 54, in order to also turn the adjustment element 4 when the fastening screw 6 is turned and to thereby move for the purpose of tolerance compensation in abutment with component B.

Abstract: A device fixes an object to a tree. The device includes an elongate body, one end of which is adapted for attachment to a tree. An object is slidably mounted on the elongate body. The device also includes a device for biasing the object towards the end of the body adapted for attachment to the tree. In use, pressure resulting from growth of the tree is transmitted to the object and pushes it along the elongate body against the bias and away from the tree.

Abstract: A continuity system for a building is designed to compensate for the downward settling of building elements over time, which occurs due to the shrinkage of wooden building members. The continuity system comprises one or more hold-down assemblies each having a stud-connector secured to a generally vertical stud, a generally vertical rod inserted into an opening of the stud connector, a rod-gripping member in toothed engagement with the rod above the opening, and one or more positioning elements exerting a downward force on the rod-gripping member. The rod has a lower portion secured to a stable building element such as the building's foundation. The opening of the stud-connector defines a frustoconical bearing surface on the upper surface of a portion of the stud-connector, or on a gripper support element in some embodiments.

Abstract: The description relates to an adjusting device for hook spindle rotating bolts, sash fastener rotating bolts, pull-turn bolts, swiveling bolts and the like of closures, particularly of closures for mounting in thin walls, such as sheet-metal cabinets with a frame (62) and door (12), in which the closures (10) have a closure driveshaft (24) which is provided with an external thread (22) and which holds a bolt (26) so as to be axially adjustable, and/or a bolt which is provided with an internal thread or bore hole near its free end and which holds a back-engaging device (34) so as to be adjustable perpendicular to the back-engagement plane (36). According to the invention, the rotating bolt (26) carries or forms an internal thread (38) for screwing in the closure driveshaft (24) and one side of a coupling (40), such as a claw coupling, which acts by positive engagement, whose other side (42) is held by the closure driveshaft (24) so as to be rigid against rotation.

Abstract: A fixed pillar with heat loss is a fixed pillar for losing heat. The fixed pillar with heat loss includes a metal body, a screw thread and a plurality of grooves. The metal body is a hollow body. The plurality of grooves is respectively set on two sides of the metal body and communicating with each other. The screw thread is set on one end of the metal body to fix a circuit or other electric devices. Air flows into one side of the metal body and then passes through the inner part of the metal body and last flow out from another side of the metal body. Accordingly, the metal body exchanges heat with the air to lose the thermal energy quickly.

Abstract: A connector includes: a first connector body having a plurality of first lead terminals soldered onto a first wiring board; a second connector body having a plurality of second lead terminals soldered onto a second wiring board; a screw member; and a fastening member engageable to the screw member. The first connector body and the second connector body are engaged with each other to bring the first lead terminals and the second lead terminals into contact such that the first lead terminals and the second terminals electrically connect the first wiring board to the second wiring board. The first and second wiring boards and the first and second connector bodies are integrally fastened together by engaging the screw member to the fastening member.

Abstract: A casing of a hydraulic machine such as a gas turbine is formed as a horizontally split type flangeless casing. The flangeless casing consists of an upper casing and a lower casing joined together at joint faces and fastened by fastening bolts. The fastening bolt has a screw thread which engages the threaded hole on the joint face of the lower casing. A bolt hole having an internal screw thread and through which the fastening bolt passes is provided in the upper casing. A sleeve having an external screw thread is fitted into the bolt hole of the upper casing by engaging the external screw of the sleeve with the internal sleeve of the bolt hole. An enlarged diameter portion is formed on a shaft of the fastening bolt at the portion where the enlarged diameter portion abuts an upper end face of the sleeve when the fastening bolt is screwed into the threaded hole in the lower casing.

Abstract: An assembly and method for mounting tow or more panels where a first member is mounted to, into or from a support, a second member is threaded to the mounted first member, and a third member is threaded to the second member when it is already threadingly engaged to the mounted first member, wherein the second member has a portion extending through a hole in a first panel and into the first member so as to retain between the first and second member the first panel, and wherein the third member has a portion extending through a hole in a first panel and into the second member so as to retain between the first and second member the second panel.

Abstract: The invention relates to a bolt for integrally fastening a first member and a second member, which are spaced away to each other, the bolt comprising a cylindrical-shaped collar bolt provided on a portion of an outer peripheral surface thereof with an external thread portion and on an inner peripheral surface thereof with an internal thread portion; and a bolt body having in an area of one end of a shank an external thread portion capable of threading into the internal thread portion of the collar bolt and a head on the other end thereof.

Abstract: An adapter for hanger bolts is disclosed that includes a hex head adapted for use in a receiving device, a socket head set screw having a thread, wherein the socket head set screw is set at least partially in a socket head set screw receptacle of the hex head, and a hanger bolt housing having a hanger bolt channel abutting an end of the socket head set screw receptacle.

Abstract: An adapter for hanger bolts is disclosed that includes a hex head adapted for use in a receiving device, a socket head set screw having a thread, wherein the socket head set screw is set at least partially in a socket head set screw receptacle of the hex head, and a hanger bolt housing having a hanger bolt channel abutting an end of the socket head set screw receptacle.

Abstract: A fastener assembly 10, in respect to forces which are subsequently applied, after the installation thereof, when forces is applied in one direction, this fastener assembly 10 is self adjusting incrementally, as needed in travel or actuation; yet when a force is applied in the opposite direction, this fastener assembly 10 is not self adjusting and there is no travel or actuation.

Abstract: A bolt made from shape memory alloy that exists in a first state and is capable of changing to a second state when heated and remains in that second state even when cooled is used to self torque itself and clamp a first fixture to a second fixture. Preferred methods for using the self-torquing bolt are disclosed.

Abstract: A device for assembling two components (1,2) includes a lateral positioning set (3). The device includes a fixing screw (10), in particular threaded on the right, and capable of moving freely in a smooth through hole (13) provided in the first component (1), a spacer (20) bearing an external thread (23), in particular on the left, capable of co-operating with a tapped through hole (23), in particular on the left, provided on the second component (2) and an internal tapping (21), in particular on the right capable of co-operating with the fixing screw (10), the screw (10)/spacer (20) friction coefficient, directly or indirectly, being greater than the spacer (20)/tapped hole (23) friction coefficient, directly or indirectly.

Abstract: A device is provided which enables an object such as a window protection device to be secured to a structure, where the device passes through a hole in one or more structures located between the object, and the structure to which attachment is desired. The device can be screwed, or otherwise attached, to wood structural framing which is concealed beneath veneer, such as bricks and other masonry. The other end of the device receives a tool which allows such an installation, and also the removal of the device. The other end also receives a fastener, such as a bolt, which secures the material or the track to the end of the device, the end of the device being substantially flush with the exterior veneer surface. The end of the device is flared to seal the hole in the veneer and increase the stability of the device in the hole.

Abstract: An assembly and method for mounting tow or more panels where a first member is mounted to, into or from a support, a second member is threaded to the mounted first member, and a third member is threaded to the second member when it is already threadingly engaged to the mounted first member, wherein the second member has a portion extending through a hole in a first panel and into the first member so as to retain between the first and second member the first panel, and wherein the third member has a portion extending through a hole in a first panel and into the second member so as to retain between the first and second member the second panel.

Abstract: A hitch pin used for releasably connecting a load carrier frame to a receiving hitch attached to a carrying vehicle for transporting objects such as bicycles on the load carrier. The hitch pin includes a bolt having a head portion opposite a threaded section and a stem integrally formed between the head portion and the threaded section. A sleeve includes a bore, sized to receive the head and the stem of the bolt which is slidably held inside the bore of the sleeve using a transverse pin, secured inside the bore of the sleeve and passing through an elongate slot in the stem of the bolt. When the sleeve is rotated, the transverse pin transmits the rotation to the bolt providing the turning motion used during connecting of the frame to the receiving hitch. The connection may be made in two stages with hand-tightening as the first stage, followed by application of mechanical force, operating from a set screw, through the bolt to intensify the contact between the frame and the receiving hitch.

Abstract: Through-the-wall hot and ground type improved stud connectors are disclosed for use being positioned through heavy duty motor vehicle battery box sidewalls, engine fire walls, dashboards and the like. The stud connector including a connector housing of conductive material including a threaded bore axially therethrough. First and second flat annular lands defining opposing ends on the conductor housing. The annular outer surface on the connector housing extends from the first annular land to the second annular land. A portion of the outer surface adjacent the second flat annular land is threaded. The invention resides in a threaded stud member of predetermined length being threadedly engaged with the threaded bore axially through the connector housing for providing adjustable length threaded stud mountings on opposing ends of the connector housing.

Abstract: An apparatus for mounting an audio speaker within a wall such that the apparatus and speaker are attached to and supported by one or more wall studs and so that a face of the audio speaker is substantially flush with the wall. The apparatus broadly comprises a substantially rectangular box having a backwall and four upstanding sidewalls. One or more of the sidewalls is provided with an aperture, and inside the aperture is located a fixture assembly. The fixture assembly comprises a spacer mount through which is threaded a spacer having a bore. The spacer is threadably extendable and retractable, and can be extended to a length sufficient to contact the nearest wall stud. A fixture is then inserted into and through the bore in the spacer and is driven or screwed into the wall stud to as to secure the apparatus and speaker in position.

Abstract: An in-wall speaker mounting apparatus adapted to attach to adjacent studs in a wall is provided. Such stud attachment permits the weight of the apparatus as well as any speakers attached to the apparatus to be supported by the studs and not the wall in which the apparatus is mounted. The apparatus comprises a backwall and four upstanding sidewalls. At least one sidewall or the backwall is provided with an access hole which serves as an entry point for speaker wire or the like. At least one, and preferably two opposing sidewalls are provided with a pair of apertures each having a fixture assembly mounted thereto. The fixture assembly comprises a spacer mount having a flanged portion flush with the exterior portion of the sidewall and an exteriorly threaded region extending into the apparatus. A flanged hex nut is threaded onto the threaded region of the spacer mount with the flanged portion of the hex nut flush with the interior portion of the sidewall.

Abstract: The present invention deals with a spring-loaded tension and compression pin comprising a bush containing a spring and plunger for locating mechanical components, in which the plunger has at least one guide surface and/or at least one edge on its generated surface which engages directly with a corresponding guide surface on the threaded bush.

Abstract: A screw fastener with a second, additional external thread section apart from the main, external or internal, thread section in a typical bolt or nut, respectively. The axes of the two threaded sections in the nut or bolt are arranged parallel, eccentric, or angled relative to each other and the direction in which the thread travels for any threaded section may be the same, or different from the thread in the other section. A cap may also be formed on top of the externally threaded structure.

Abstract: A clamping mounting for glass plates uses an attachment bolt which passes through a bore in the glass plate and comprises a head and a barrel. The head and the barrel are realized as separate components whose axes can be displaced relative to one another and which can be axially fixed relative to one another. An adjusting nut has a slot-like groove in which a retaining flange of the attachment bolt is seated, the floor of which groove forms a support flange for the retaining flange and has a slot which guides, and through which passes, the barrel of the attachment bolt.

Abstract: A tie rod for reinforcing heating, ventilating and air conditioning (HVAC) ducts against excessive wall flexure in response to positive and/or negative static or dynamic pressure differentials between the interior and exterior of the duct includes a threaded steel rod having a pair of abutment structures irrotatably fastened to longitudinally opposed end portions of the rod. Each abutment structure has a central coaxial bore which receives the rod, and includes a tubular portion terminated at an outer longitudinal end thereof by a transversely disposed, radially outwardly protruding annular flange. The bore wall of the abutment structure's tubular portion flares in an arcuate curve radially and axially outwardly to join the outer transverse wall surface of the flange, forming a tapered annular cavity between the bore wall and the end portion of the threaded rod protruding out from the abutment structures.

Abstract: A small, compact, self-contained fastener. The fastener has a cylindrical housing of which one of the embodiments has threads located on its exterior for releasably securing the housing to a one of the two objects being fastened. Inside the housing is located a cooperating member which extends in the axial direction of the housing. The cooperating member is movable between an engaged position in which the cooperating member engages the second object and a dis-engaged position in which the cooperating member does not engage the second object. The cooperating member has a cooperating member stop shoulder opposed to the housing stop shoulder and adapted to mate with the housing stop shoulder when the cooperating member is in the engaged position. When the cooperating member is in the engaged position, the cooperating member can retain the second object at a selected position with respect to the first object.

Abstract: A support tube for use with a support tube surface area assembly such as a shelf, a portion of a furniture article, or other structure, comprises a first end, a body section, and a second end. The first end and second end of the support tube are outwardly flared to provide a tapered interior area into which a first and a second accessory element, such as a nut and bolt, may be inserted. The accessory elements are enclosed in the tapered interior area by a crimping and flattening of the lips of the first and second end such that they form an interiorly extending flange partially encapturing the accessory elements. A method for making the support tube is disclosed as well a shelf structure or furniture article assembled with the support tube.

Abstract: An assembly is disclosed for mounting articles such as soap dishes, towel hangers, handles, and the like, to a recessed stud that lies behind a non-structural wall, such as the side wall of a pre-fabricated fiberglass bathroom shower. A fascia plate has a mounting surface on one side, and a cup-shaped portion on the other side. The cup has an internal thread that engages an external thread of an elongated stud. The elongated stud has an axial through hole for receiving a screw that has a screwhead and a threaded shaft. The screw is inserted into the through hole of the stud, and then inserted into a hole formed in the non-structural wall and screwed into the recessed stud. The cup portion of the fascia plate is then inserted into the hole in the non-structural wall and screwed onto the external thread of the elongated stud. As such, the mounting surface of the fascia plate is rigidly supported by the recessed stud for mounting the articles thereto.

Abstract: The present invention discloses a self-tapping anchor and a method of installing the anchor into a wall. The anchor includes a flange portion, a drill end portion, and an intermediate shank portion. The intermediate shank portion has a central bore therein for receiving a fastener. An external thread is formed on the shank portion for threading the anchor into the wall. The shank portion is divided by a slot into a pair of leg portions and the external thread is divided into a plurality of discrete thread segments. The drill end portion supports the leg portions to prevent relative twisting therebetween during anchor installation into a wall. A reduced thickness web portion, or alternatively, a through slot, is formed in the drill end portion. When the threaded fastener is threaded into the central bore, the fastener causes the drill end portion to split apart releasing the leg portions so that the leg portions diverge to provide better anchor securement to the wall.

Abstract: Apparatus for securing together structural members includes a stud threaded at both ends and a stud sleeve threaded at both ends. The stud and stud sleeve are coaxial with the stud extending through the stud sleeve and beyond the ends of the stud sleeve. The threaded stud ends and the threaded sleeve ends are separately threadedly connected to the structural members so that both the stud and stud sleeve apply forces to the structural members to secure them together. No significant transfer of load between the stud and the stud sleeve will occur.

Abstract: The presently preferred embodiment of the invention is a multiple speed fastener having a first pair of interengageable threaded members with a first pitch and a first thread direction, a second pair of interengageable threaded members with a second pitch different from the first pitch and a second thread direction different from the first thread direction, the first pair including a first actuator threadably engageable with a first threaded member and the second pair including a second actuator threadably engageable with a second threaded member, and a coupling means for coupling the first pair to the second pair, with the first actuator and the coupling means having first means for selectively engaging the first actuator and coupling means to rotate the coupling means with the first actuator, and with the coupling means and the second actuator having second means for engaging the second actuator to rotate the second threaded member when the first actuator and coupling means are engaged.

Abstract: A driving assembly for driving opposed first and second driven members includes an elongated rod and a stop unit. The elongated rod extends through a through-hole of the second driven member. The elongated rod has an enlarged threaded first portion which is adapted to extend threadably through a screw hole of the first driven member and which is sized to prevent extension of the first portion through the through-hole of the second driven member, and a second portion which is adapted to extend out of the through-hole of the second driven member. The first and second portions of the elongated rod extend from two sides of the second driven member. The stop unit is connected to the second portion of the elongated rod so as to prevent axial movement of the elongated rod toward the first driven member.

Abstract: The present invention is directed to a bolt with shearable head (1) with an external thread section (15), a head section (3) and a taper section (7) forming a predetermined breakage point (6), provided for between the external thread section and the head section, as well as an end section providing a clamping contact (9). Furthermore, there is provided a threaded bush (15), extending at least partly along the external thread section (5) and having in turn an external thread (17).

Abstract: An assembly for extending a vertical height of a fence. The inventive device includes a plurality of mourning posts securable to opposed sides of an existing fence. A plurality of panels extend between the posts and rest upon a top surface of the fence so as to extend an effective vertical height of the fence.

Abstract: A cryogenic freezing tunnel having a conveyer belt, insulated panels, each panel comprised of an inner metal surface layer, a wooden layer, a foam insulation layer, an outer metal surface layer, and tie pins connecting the outer and inner metal surface layers together, thereby, preventing void spaces between the inner metal layers and the wooden layers of the panels, which leads to ice build-up and bulging of the inner metal surface which forces collection pans and conveyer belt supports mounted on top the inner metal surfaces upward into the conveyer belt and consequently causes damage to the collection pans, conveyer belt supports, and conveyer belt.

Abstract: A heat insulating support tool is provided for a concrete wall structure. The support tool may include a pedestal member having a through-hole extending axially through the pedestal member, a fixing rod-like member extending through the through-hole of the predestal member, and a spacing holding rod-like member embedded in the concrete wall. The fixing rod-like member may include a rotating member at a front end thereof and an enlarged head member at a rear end thereof. In addition, a connecting device may be provided for connecting one end of the spacing holding rod-like member to the fixing rod-like member so that the connection of the spacing holding rod-like member and the fixing rod-like member can be released by rotating the rotating member.