JP2019136811A - Fastening jig and fastening device - Google Patents

Abstract

To provide a fastening jig and a fastening device capable of fastening a fastening object member in a state of being positioned-held to a work, even if the work is a wall or a ceiling.SOLUTION: A fastening jig 3 comprises a cylinder 31 and a pilot pin 32 arranged in a recessed part 31b provided in the cylinder 31 and projecting a tip part from one end side in the axial direction of the cylinder 31, and the pilot pin 32 comprises falling-off preventive claws 33a and 33b protrusible-retreatable in the radial direction from a side wall of the pilot pin 32 and a movement mechanism for protruding-retreating the falling-off preventive claws 33a and 33b from the sidewall, and the pilot pin 32 is penetrated through a through-hole of a work 1 and an installation hole of the fastening object member 2, and the falling-off preventive claws 33a and 33b are projected in the radial direction from the sidewall of the pilot pin 32, and thereby prevent the fastening object member 2 from falling off from the work 1.SELECTED DRAWING: Figure 7C

Description

  The present invention relates to a fastening jig and a fastening device used when fastening a fastened member to a work using a fastening member.

  2. Description of the Related Art Conventionally, in a rivet fastening device, positioning of a work attachment hole and a fastening member attachment hole is performed using a pilot pin protruding from an upper end portion of an anvil. Then, the rivet is set above the pilot pin and lowered, and the rivet is guided to the work and the attachment hole of the member to be fastened while pushing the pilot pin into the anvil. The bottom surface of the rivet inserted into the attachment hole of the workpiece and the member to be fastened is plastically deformed by being pressed against the upper end surface of the anvil, and fastens the workpiece and the member to be fastened (see, for example, Patent Document 1 and Patent Document 2) ).

Japanese Patent No. 4919452 Japanese Utility Model Publication No. 3-35466

  However, the conventional fastening device has a problem that when the workpiece is a wall or a ceiling, the fastening member is dropped from the pilot pin, and thus the fastening device cannot be used. The pilot pin of the conventional fastening device is only inserted into an attachment hole formed in the workpiece and the member to be fastened, and does not have a function of holding the member to be fastened to the workpiece. For this reason, conventionally, when the work is a wall or a ceiling, an operator holds the pin and the fastened member in which the mounting holes of the work and the fastened member are positioned. And the operator pulled out the pin currently hold | maintained and fastened the rivet. Conventionally, the worker has to repeat this work by the number of rivets, and the work efficiency is poor.

  The present invention has been made to solve the above-described problems, and provides a fastening jig and a fastening device that can be fastened in a state in which a member to be fastened is positioned and held with respect to a workpiece. It is.

  A fastening jig according to the present invention includes a cylinder and a pilot pin that is disposed in a recess provided in the cylinder and has a tip protruding from one end side in the axial direction of the cylinder. It has a drop-out prevention claw that can protrude and retract in the radial direction from the side wall, and a movement mechanism that allows the drop-out prevention claw to protrude from the side wall. By causing the claw to protrude radially from the side wall of the pilot pin, the fastened member is prevented from falling off the workpiece.

  The present invention provides a fastening jig that can hold a member to be fastened to the work in a state where the member to be fastened is positioned on the work. Thereby, a to-be-fastened member can be fastened with respect to a workpiece | work, without an operator holding a to-be-fastened member.

It is a schematic diagram which shows the workpiece | work by which the to-be-fastened member was positioned and hold | maintained with the jig | tool for fastening of Embodiment 1 of this invention. It is a front view of the fastening jig of Embodiment 1 of the present invention. It is a side view of the jig | tool for fastening of Embodiment 1 of this invention. It is sectional drawing which shows the jig | tool for fastening along the IV-IV line of FIG. It is sectional drawing which shows the jig | tool for fastening along the VV line of FIG. FIG. 4 is an enlarged view of a pilot pin in FIG. 3. It is the elements on larger scale which looked at the P section of Drawing 6A from the direction of an arrow. It is a figure which shows a mode that the jig | tool for fastening of Embodiment 1 of this invention is attached to a workpiece | work and a to-be-fastened member. It is a figure which shows a mode that the jig | tool for fastening of Embodiment 1 of this invention is attached to a workpiece | work and a to-be-fastened member. It is a figure which shows a mode that the jig | tool for fastening of Embodiment 1 of this invention is attached to a workpiece | work and a to-be-fastened member. FIG. 6 is a view showing a modification of the dropout prevention claw of the fastening jig of the first embodiment. It is a figure which shows the fastening apparatus used with the jig | tool for fastening of Embodiment 1 of this invention. It is a figure which shows the cross section of the fastening apparatus of FIG. It is a figure which shows a mode that a blind rivet is driven using the fastening jig | tool and fastening apparatus of Embodiment 1 of this invention. It is a figure which shows a mode that a blind rivet is driven using the fastening jig | tool and fastening apparatus of Embodiment 1 of this invention. It is a figure which shows a mode that a blind rivet is driven using the fastening jig | tool and fastening apparatus of Embodiment 1 of this invention. It is a figure which shows the example which performs screw fastening using the jig | tool for fastening of Embodiment 1 of this invention. It is a figure which shows the 1st modification of the jig | tool for fastening of Embodiment 1 of this invention. It is a figure which shows the modification of the pilot pin of the fastening jig | tool of Embodiment 1 of this invention. It is a figure which shows the state in which the drop-off prevention nail | claw of the pilot pin of FIG. 14A was stored. It is a figure which shows the 2nd modification of the jig | tool for fastening of Embodiment 1 of this invention. It is a figure which shows the jig | tool for fastening of Embodiment 2 of this invention. It is a figure which shows the state which fastened the rivet using the jig | tool for fastening of Embodiment 2 of this invention. It is a figure which shows the state which attached the support member to the jig | tool for fastening of Embodiment 2 of this invention.

  Hereinafter, preferred embodiments of a fastening jig and a fastening device of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
FIG. 1 shows a state in which a rivet 70 is fastened to a work 1 in which a member to be fastened 2 is positioned and held by a fastening jig 3 according to Embodiment 1 of the present invention, using a fastening device 5 that is a riveting device. FIG. FIG. 2 is a front view of the fastening jig 3. FIG. 3 is a side view of the fastening jig 3. 4 is a cross-sectional view of the fastening jig 3 along the line IV-IV in FIG. FIG. 5 is a cross-sectional view of the fastening jig 3 along the line V-V in FIG.

  As shown in FIG. 1, the work 1 has a top plate, a side wall, and a bottom plate. The fastened member 2 is a plate-like member, and is attached to the top plate, the side wall, and the bottom plate of the work 1 by a rivet 70 that is a blind rivet.

  In addition, the shape of the workpiece | work 1 and the to-be-fastened member 2 shown in FIG. 1, and the attachment position of the to-be-fastened member 2 with respect to the workpiece | work 1 are examples. Moreover, in Embodiment 1, the rivet 70 which is a blind rivet is used as a fastening member, However, A fastening member is not restricted to a blind rivet. For example, the fastening member may be a solid rivet or a screw as will be described later. Further, in FIG. 1, the fastening jig 3 is inserted from the attachment hole 2 a side of the member 2 to be fastened, and the rivet 70 is inserted from the through hole 1 a side of the workpiece 1. The positional relationship with the rivet 70 may be reversed.

  The fastened member 2 has a plurality of mounting holes 2a. The workpiece 1 is provided with a plurality of through holes 1a corresponding to the plurality of mounting holes 2a of the member 2 to be fastened. The fastened member 2 is positioned with respect to the workpiece 1 by matching the center of each mounting hole 2 a with the center of each corresponding through hole 1 a of the workpiece 1. And the to-be-fastened member 2 and the workpiece | work 1 are couple | bonded by inserting the rivet 70 in each attachment hole 2a and each through-hole 1a using the fastening device 5, and fastening.

  The fastening member is not limited to the rivet 70. For example, the fastening member may be a screw or a bolt. In this case, the fastening device 5 uses a nut runner instead of a riveting device.

  When the fastened member 2 is attached to the ceiling and side wall of the workpiece 1, the fastened member 2 must be held so as not to fall. As shown in FIG. 1, the fastening jig 3 according to the first embodiment can hold the workpiece 1 and the member to be fastened 2 in a positioned state.

  FIG. 2 is a front view of the fastening jig 3, and FIG. 3 is a side view of the fastening jig 3. 4 is a sectional view taken along line IV-IV in FIG. 2, and FIG. 5 is a sectional view taken along line VV in FIG.

  The fastening jig 3 is a cylindrical cylinder 31 and a cylindrical pilot that is built in the cylinder 31 and moves in the axial direction with respect to the cylinder 31 so that the tip portion protrudes from one end side in the axial direction of the cylinder 31. And a pin 32.

  As shown in FIG. 4, the cylinder 31 has a cylindrical recess 31b that is open at one end. A compression coil spring 311 as an urging member and a pilot pin 32 are disposed in the recess 31b. The pilot pin 32 is movable in the axial direction within the recess 31b. The compression coil spring 311 constantly urges the pilot pin 32 in a direction protruding from the recess 31b, and functions as an urging member.

  An annular magnet 35 is attached to one end side of the cylinder 31. As the magnet 35, neodymium, ferrite, samarium cobalt, alnico magnet, or the like is used. When the workpiece 1 or the member to be fastened 2 is a magnetic body, the fastening jig 3 can be attracted to the workpiece 1 or the member to be fastened 2 by the magnet 35. Therefore, when the workpiece 1 is a wall or the like, the load on the pilot pin 32 can be reduced.

  The pilot pin 32 has a tip portion that is tapered. Thereby, the operation | work which inserts the pilot pin 32 in the through-hole 1a of the workpiece | work 1 and the attachment hole 2a of the to-be-fastened member 2 becomes easy.

  Further, the pilot pin 32 has a pair of dropout prevention claws 33a and 33b protruding and retracting in the radial direction from the cylindrical side wall of the pilot pin 32, and a moving mechanism for protruding and retracting the pair of dropout prevention claws 33a and 33b from the sidewall. ing. The fastening jig 3 allows the pilot pin 32 to pass through the through hole 1 a of the workpiece 1 and the mounting hole 2 a of the member 2 to be fastened positioned on the workpiece 1, so that the pair of drop prevention claws 33 a and 33 b and the cylinder 31 The workpiece 1 and the fastened member 2 are held between one end side.

  As shown in FIG. 5, the cylindrical side wall of the cylinder 31 is provided with a plurality of screw holes 31a in the axial direction. A screw 40 is screwed into one of the plurality of screw holes 31a. The screw 40 penetrates the cylindrical side wall of the cylinder 31 and protrudes into the recess 31b. An elongated notch 321 is formed on the side wall of the pilot pin 32 along the axial direction. The tip of the screw 40 passes through the notch 321 of the pilot pin 32 and protrudes into the pilot pin 32.

  As a result, the screw 40 functions as a stopper that prevents the pilot pin 32 from falling off the cylinder 31. Further, the amount of projection of the pilot pin 32 from the cylinder 31 can be changed by changing the screw hole 31a into which the screw 40 is inserted. Thereby, according to the thickness of the workpiece | work 1 and the to-be-fastened member 2, the distance from the one end side of the axial direction of the cylinder 31 to drop-off prevention claws 33a and 33b can be changed.

  6A is an enlarged view of the pilot pin 32 of FIG. FIG. 6B is a partially enlarged view of the portion P in FIG. 6A as viewed from the direction of the arrow.

  The pair of drop prevention claws 33 a and 33 b move along the drop prevention claw guides 331 a and 331 b, respectively, and appear and disappear from the side wall of the pilot pin 32. As shown in FIG. 6B, a protrusion 33c is formed at the tip of the drop-off prevention claw 33a. The drop-off preventing claw guide 331a has a cross section perpendicular to the longitudinal direction formed in a C shape surrounding the convex portion 33c. Here, the drop prevention claw 33a will be described, but the same applies to the drop prevention claw 33b.

  The convex portion 33c is movable along the drop-off preventing claw guide 331a in the C-shaped groove of the drop-off preventing claw guide 331a. Further, the convex portion 33c is restricted by the C-shaped groove of the dropout prevention claw guide 331a so as not to be separated from the dropout prevention claw guide 331a. This prevents the drop prevention claw 33a from being detached from the drop prevention claw guide 331a.

  A moving mechanism that moves the pair of drop-off preventing claws 33 a and 33 b includes a rod 34, a link mechanism 36, and a compression coil spring 37.

  The rod 34 is supported by a rod guide 341. One end side of the rod guide 341 is fixed to the inner wall of the pilot pin 32. The other end side of the rod guide 341 extends radially inward from the inner wall of the pilot pin 32. Then, the other end side of the rod guide 341 positions the rod 34 at the central portion in the radial direction of the pilot pin 32. Thereby, the rod 34 can move only in the axial direction at the radial center of the pilot pin 32.

  One end side of the rod 34 can be projected and retracted to the outside of the pilot pin 32 through a through hole formed at the tip of the pilot pin 32. The other end side of the rod 34 is connected to the connection portion J1 of the link mechanism 36.

  The link mechanism 36 includes an arm 361 and an arm 362. The other end side of the arm 361 and the other end side of the arm 362 are coupled to each other at a connecting portion J1 provided at the radial center of the pilot pin 32. The drop-off preventing claw 33a is rotatably connected to one end side of the arm 361. The drop-off preventing claw 33b is rotatably connected to one end side of the arm 362.

  One end of the compression coil spring 37 is fixed to the bottom of the pilot pin 32. The other end side of the compression coil spring 37 is connected to the connection portion J1. Thus, the rod 34 is urged by the compression coil spring 37 in a direction protruding from the pilot pin 32.

  Further, one end side of the arm 361 and one end side of the arm 362 are urged toward the radially outer side of the pilot pin 32 by a compression coil spring 37. The drop-off prevention claw 33a connected to one end of the arm 361 and the drop-off prevention claw 33b connected to one end of the arm 362 are arranged on the tip end side of the pilot pin 32 along the corresponding drop-off prevention claw guide 331. It is energized.

  By configuring the moving mechanism as described above, one end side of the pair of drop-off preventing claws 33a and 33b and the rod 34 always protrudes outside the pilot pin 32. When the pair of dropout prevention claws 33 a and 33 b are pressed from the outside, the pair of dropout prevention claws 33 a and 33 b move toward the inside of the pilot pin 32 against the urging force of the compression coil spring 37.

  Thus, when the pilot pin 32 is inserted into the through hole 1a of the workpiece 1 or the attachment hole 2a of the member 2 to be fastened, the pair of drop prevention claws 33a and 33b are pressed against the inner wall of the through hole 1a or the attachment hole 2a. Then, it moves along the drop-off preventing claw guides 331a and 331b toward the inside of the pilot pin 32. When the pair of drop-off prevention claws 33a and 33b pass through the through hole 1a or the attachment hole 2a, the pair of drop-off prevention claws 33a and 33b are urged by the restoring force of the compression coil spring 37. Protrudes along.

  When one end of the rod 34 is pressed in the axial direction from the outside, the connecting portion J1 moves toward the bottom of the recess 31b while compressing the compression coil spring 37. Then, the other end side of the arm 361 and the other end side of the arm 362 are pulled toward the bottom of the recess 31b. Then, the drop-off preventing claw 33 a connected to one end of the arm 361 and the drop-off preventing claw 33 b connected to one end of the arm 362 are pulled inside the pilot pin 32. As a result, the pair of drop prevention claws 33 a and 33 b move toward the inside of the pilot pin 32 along the drop prevention claw guides 331 a and 331 b.

  In this manner, the pair of drop-off preventing claws 33a and 33b move so as to be stored inside the pilot pin 32 when directly pressed from the outside and when one end side of the rod 34 is pressed in the axial direction. .

  Here, a procedure until the member 2 to be fastened is held in a state of being positioned on the workpiece 1 using the fastening jig 3 will be described with reference to FIGS. 7A to 7C.

  First, the fastened member 2 is positioned on the workpiece 1. As shown in FIG. 7A, the position of the mounting hole 2 a of the fastened member 2 is aligned with the through hole 1 a of the work 1, and the fastened member 2 is overlapped with the work 1. Next, the tip end portion of the pilot pin 32 of the fastening jig 3 is inserted into the through hole 1 a of the workpiece 1 and the attachment hole 2 a of the member 2 to be fastened.

  When the pair of drop-off preventing claws 33 a and 33 b protruding from the side wall of the pilot pin 32 come into contact with the workpiece 1, the fastening jig 3 is pressed against the workpiece 1. Then, as shown in FIG. 7B, the pair of drop prevention claws 33 a and 33 b are stored inside the pilot pin 32 against the urging force of the compression coil spring 37.

  When the fastening jig 3 is further pressed against the workpiece 1, the tip of the pilot pin 32 penetrates the workpiece 1 and the member 2 to be fastened. Then, the surface of the magnet 35 attached to one end side of the cylinder 31 contacts the workpiece 1. At this time, if the work 1 is a magnetic body, the surface of the magnet 35 is attracted to the work 1. Thereby, the fastening jig 3 is fixed to the workpiece 1.

  As shown in FIG. 7C, when the pair of drop prevention claws 33a and 33b penetrate the through hole 1a and the fastening member 2 of the workpiece 1, the pair of drop prevention claws 33a and 33b are caused by the restoring force of the compression coil spring 37. It protrudes again from the side wall of the pilot pin 32. As described above, the workpiece 1 and the fastened member 2 are held between the pair of dropout prevention claws 33 a and 33 b and one end side of the cylinder 31.

  As described above, the fastening jig 3 according to the first embodiment is disposed in the cylinder 31 and the concave portion 31b of the cylinder 31 and moves in the axial direction with respect to the cylinder 31, and the tip portion is in the axial direction of the cylinder 31. A pilot pin 32 that protrudes and protrudes from one end side thereof, and a compression coil spring 311 that is disposed in the recess 31 b and constantly urges the tip end portion of the pilot pin 32 in a direction protruding from the cylinder 31. Further, the pilot pin 32 of the fastening jig 3 includes a pair of dropout prevention claws 33 a and 33 b protruding from the side wall of the pilot pin 32 in the radial direction and a pair of dropout prevention claws 33 a and 33 b from the side wall of the pilot pin 32. And a moving mechanism that appears and disappears. The fastening jig 3 passes the pilot pin 32 through the attachment hole 2a of the work 1 and the attachment hole 2a of the fastened member 2 positioned on the work 1, and a pair of drop-off prevention claws 33a and 33b, The workpiece 1 and the fastened member 2 are held between one end side of the cylinder 31.

  Thereby, the fastening jig 3 according to the first embodiment can hold the fastened member 2 in a state of being positioned on the workpiece 1. Therefore, even if the work 1 is a ceiling or a wall, the worker can position and hold the fastened member 2 with respect to the work 1 without holding the fastened member 2.

  Although the shape of the pair of fall prevention claws 33a and 33b described in FIGS. 3 to 7C is formed in an arc shape protruding outward in the radial direction of the pilot pin 32, the pair of fall prevention claws 33a and 33b. However, the shape is not limited to this. For example, the shape of the drop-off prevention claw may be a trapezoidal shape with A to D as apexes, like the drop-off prevention claw 33E of the modification shown in FIG.

  The side AB of the dropout prevention claw 33E according to the modification is parallel to the inclination direction of the dropout prevention claw guide 331a. Further, the length of the side AB is the same as the length of the EF of the drop-off preventing claw guide 331a. By setting the shape of the drop-off prevention claw 33E to such a shape, the drop-off prevention claw 33E can be smoothly stored in the pilot pin 32.

  FIG. 9 is a side view of the distal end portion of the fastening device 5 that is used together with the fastening jig 3 of the first embodiment. FIG. 10 is a cross-sectional view in the axial direction of FIG.

  The distal end portion of the fastening device 5 includes a cylindrical holding portion 51 that holds the rivet 70, a compression coil spring 52, and an annular magnet 53.

  As shown in FIG. 10, the holding | maintenance part 51 has the cylindrical space part 51a inside. The space 51 a has an opening 51 b on one end side in the axial direction of the holding portion 51. A chuck 54 that holds the core rod 70a of the rivet 70 is disposed in the space 51a so as to be movable in the axial direction.

  The core rod 70 a of the rivet 70 is inserted into the space 51 a from the opening 51 b of the holding unit 51. The tip of the core rod 70a inserted to the base of the space 51a is gripped by the chuck 54. Thereby, the rivet 70 is held by the holding portion 51 of the fastening device 5.

  The compression coil spring 52 is disposed concentrically with the rivet 70 held by the holding portion 51, and one end side is fixed to the end portion of the holding portion 51 so as to surround the rivet 70. The magnet 53 is attached to the other end side of the compression coil spring 52 with the surface having the magnetic pole attracting the surface of the magnet 35 of the fastening jig 3 facing the opposite side to the compression coil spring 52. Since the other end side of the compression coil spring 52 is not fixed to the holding portion 51, the magnet 53 can move in the axial direction as the compression coil spring 52 expands and contracts.

  Next, a procedure for fastening the workpiece 1 and the member 2 to be fastened by the rivet 70 using the fastening device 5 will be described with reference to FIGS. 10 and 11A to 11C. In addition, the to-be-fastened member 2 shall be positioned and hold | maintained with respect to the workpiece | work 1 by the fastening jig | tool 3 according to the procedure of FIG. 7A-FIG. 7C previously.

  First, as shown in FIG. 10, the rivet 70 is set on the holding portion 51 of the fastening device 5. The tip of the core rod 70 a of the rivet 70 is inserted into the space 51 a from the opening 51 b of the holding part 51. The core rod 70a is inserted to the base, and the head of the rivet 70 is abutted against the opening 51b. Next, the tip of the core rod 70 a is gripped by the chuck 54. Thereby, the rivet 70 is held by the holding portion 51.

  Next, as shown in FIG. 11A, the annular magnet 53 of the fastening device 5 is brought close to the fastened member 2 so as to cover the tip of the pilot pin 32 of the fastening jig 3. Then, the magnet 35 of the fastening jig 3 and the magnet 53 of the fastening device 5 are attracted to each other via the workpiece 1 and the fastened member 2. Next, the magnet 53 is abutted against the fastened member 2, and the magnet 53 is attracted to the fastened member 2 by the magnetic force acting between the magnet 35 and the magnet 53. Then, the workpiece 1 and the member to be fastened 2 are sandwiched between the surface of the magnet 35 and the surface of the magnet 53 and are brought into close contact with each other. As a result, the bottom portion 70 b of the rivet 70 held by the holding portion 51 and the tip portion of the pilot pin 32 face each other.

  Here, the attractive force between the magnet 35 and the magnet 53 with the workpiece 1 and the fastened member 2 sandwiched therebetween varies depending on the material and thickness of the work 1 and the fastened member 2. Therefore, the appropriate residual magnetic flux density and area of the magnet 35 and the magnet 53 need to be determined based on the material and thickness of the workpiece 1 and the fastened member 2. The residual magnetic flux density is a characteristic value specific to the magnet material and is determined by the type and grade of the magnet. In general, a magnet material having a larger residual magnetic flux density can produce a smaller and stronger magnet.

  Next, the holding portion 51 of the fastening device 5 is advanced toward the pilot pin 32 while compressing the compression coil spring 52. Then, the bottom portion 70 b of the rivet 70 held by the holding portion 51 is abutted against the tip portion of the rod 34 protruding from the tip portion of the pilot pin 32. The holding portion 51 is further advanced, and the tip of the rod 34 is pushed into the pilot pin 32 by the bottom surface of the rivet 70.

  Then, the compression coil spring 37 is compressed, and the connecting portion J1 of the moving mechanism moves to the rear end side of the pilot pin 32. Then, the other end side of the arm 361 and the other end side of the arm 362 connected to the connection portion J1 move to the rear end portion side of the pilot pin 32. Accordingly, the drop-off preventing claw 33 a connected to one end of the arm 361 and the drop-off preventing claw 33 b connected to one end of the arm 362 are stored inside the pilot pin 32.

  Here, the spring constant of the compression coil spring 311 disposed in the recess 31 b of the cylinder 31 is larger than the spring constant of the compression coil spring 37 that urges the rod 34. Therefore, when one end side of the rod 34 is pressed in the axial direction, only the compression coil spring 37 is compressed, and the compression coil spring 311 is not compressed. The compression coil spring 311 is compressed only when the pilot pin 32 is pressed in the axial direction.

  Further, the force that attracts the magnet 35 of the fastening jig 3 and the magnet 53 of the fastening device 5 is larger than the restoring force of the compression coil spring 311. Therefore, even if the tip end portion of the pilot pin 32 is pressed by the bottom portion 70 b of the rivet 70, the fastening jig 3 is not detached from the workpiece 1 as long as the compression coil spring 311 is within a compressible range. Therefore, even if the positions of the workpiece 1 and the fastened member 2 are opposite and the fastening jig 3 is attached to the fastened member 2, the fastening jig 3 is attached together with the fastened member 2. It does not leave the workpiece 1.

  Next, the holding portion 51 is further advanced to press the bottom surface of the rivet 70 against the tip portion of the pilot pin 32. Then, the pilot pin 32 is pushed into the recess 31 b of the cylinder 31 while compressing the compression coil spring 311.

  Then, the tip of the pilot pin 32 comes out of the through hole 1a of the workpiece 1 and the mounting hole 2a of the member 2 to be fastened. 11B, the bottom portion 70b of the rivet 70 is inserted into the through hole 1a of the workpiece 1 and the attachment hole 2a of the member 2 to be fastened.

  When the bottom portion 70b of the rivet 70 is completely inserted and the head of the rivet 70 hits the fastened member 2, the chuck 54 of the fastening device 5 is retracted. Then, as shown in FIG. 11C, the core rod 70a of the rivet 70 is pulled to deform the bottom portion 70b of the rivet 70.

  In FIG. 11C, the bottom 70b of the deformed rivet 70 protrudes radially outward. However, since the escape portion 31c is formed on one end side of the cylinder 31, the bottom portion 70b of the rivet 70 does not interfere with the inner wall of the recess portion 31b.

  Next, the chuck 54 is further retracted, and the core rod 70 a is detached from the head of the rivet 70. Next, the fastening device 5 is separated from the fastened member 2. Then, the fastening jig 3 is removed from the workpiece 1. Thus, the fastening of the fastened member 2 to the work 1 is completed.

  In the first embodiment, the fastening jig 3 is used for fastening with the rivet 70, but fastening using the fastening jig 3 is not limited to fastening with the rivet 70. For example, as shown in FIG. 12, the fastening jig 3 may be used for fastening with screws 71. In this case, the fastening device 5A that is a nut runner is used as the fastening device. Similar to the fastening device 5, the fastening device 5A includes a compression coil spring 52A and a magnet 53A at the tip. The fastening device 5A includes a screw tightening screwdriver 55 at the tip.

  Further, in the fastening jig 3 according to the first embodiment, the moving mechanism of the drop-off preventing claws 33a and 33b is configured by the link mechanism 36, the rod 34, and the compression coil spring 37 as an urging member. The structure of the mechanism is not limited to this. For example, you may comprise without a biasing member like the fastening jig | tool 3A of the 1st modification shown in FIG.

  The fastening jig 3 </ b> A of the first modification is extended from the through hole provided at the bottom of the cylinder 31 by extending the rear end side of the rod 34 </ b> A. The rod 34 </ b> A can be manually moved from the rear of the cylinder 31. Accordingly, it is possible to manually move the rod 34 </ b> A so that the pair of drop-off preventing claws 33 a and 33 b can protrude and retract from the side wall of the pilot pin 32.

  That is, the pilot pin 32 can be inserted into the through hole 1a of the workpiece 1 and the attachment hole 2a of the fastened member 2 in a state where the pair of drop prevention claws 33a and 33b are stored inside the pilot pin 32. Therefore, it is possible to insert the pilot pin 32 without bringing the drop prevention claws 33a and 33b into contact with the through hole 1a of the workpiece 1 and the mounting hole 2a of the member 2 to be fastened.

  Further, in the fastening jig 3 according to the first embodiment, the moving mechanism of the pair of drop prevention claws 33a and 33b is configured by the rod 34 and the link mechanism 36. However, the movement mechanism of the drop prevention claws 33a and 33b. Is not limited to this. For example, the drop-off preventing claw 38 may be moved by a rack-and-pinion mechanism like a pilot pin 32A of the modification shown in FIGS. 14A and 14B.

  As shown in FIG. 14A, a rack R1 is formed on the rod 34B of the pilot pin 32A. A rack R2 is formed on the drop-out preventing claw 38 of the pilot pin 32A. A pinion gear 334 is disposed near the center of the pilot pin 32A. The pinion gear 334 is provided with a first gear G1 that meshes with the rack R1 and a second gear G2 that meshes with the rack R2.

  FIG. 14B shows a state in which the rod 34B compresses the compression coil spring 37 and is pushed into the pilot pin 32A. When the rod 34B is pushed into the pilot pin 32A, the rack R1 formed on the rod 34B moves to the bottom side of the pilot pin 32A. Then, the first gear G1 meshing with the rack R1 rotates, and the pinion gear 334 rotates in the clockwise direction.

  When the pinion gear 334 rotates in the clockwise direction, the second gear G2 provided in the pinion gear 334 also rotates in the clockwise direction. Then, the rack R2 meshing with the second gear G2 moves to the inside in the radial direction of the pilot pin 32A. Thereby, the drop-off preventing claw 38 in which the rack R2 is formed moves in the direction in which it is stored in the pilot pin 32A.

  When the force that presses the rod 34A is removed, the restoring force of the compression coil spring 37 moves the rod 34A in a direction protruding from the pilot pin 32A. Along with this, the pinion gear 334 rotates counterclockwise, and the dropout prevention claw 38 projects from the side wall of the pilot pin 32A.

  Note that the rear end side of the rod 34B may be extended in the same manner as the fastening jig 3A of the first modification. The fastening jig 3B of the second modification shown in FIG. 15 is formed by extending the rear end side of the rod 34B to form a rod 34C and projecting from the bottom of the cylinder 31.

Embodiment 2. FIG.
16A and 16B are diagrams showing a fastening jig 3C of the second embodiment. The fastening jig 3C according to the second embodiment is different from the fastening jig 3 according to the first embodiment in that the recess 31b of the cylinder 31A has a step portion 31d. Further, the fastening jig 3C according to the second embodiment is used for fastening using a solid rivet or a hollow rivet. Other configurations are the same as those in the first embodiment.

  As shown in FIG. 16A, the pilot pin 32 is pressed by the bottom 72b of the rivet 72 held by the fastening device 5B and is pushed into the recess 31b of the cylinder 31A. Since the step 31d is formed in the recess 31b, the pilot pin 32 hits the step 31d and stops. Thus, the step portion 31d functions as a stopper that restricts the movement of the pilot pin 32 in the bottom direction of the recess 31b.

  In a state where the movement of the pilot pin 32 is stopped by the stepped portion 31d, the bottom portion 72b of the rivet 72 is further pressed against the tip end portion of the pilot pin 32 by the fastening device 5B. Then, as shown in FIG. 16B, the bottom 72 b of the rivet 72 is crushed by the tip of the pilot pin 32.

  The surface area of the tip portion of the pilot pin 32 is smaller than the surface area of the bottom portion 72 b of the rivet 72. For this reason, the bottom 72b of the rivet 72 is depressed by the tip of the pilot pin 32 and expands outward in the radial direction. Since the escape portion 31c is formed on one end side of the cylinder 31A, even if the bottom portion 72b of the rivet 72 expands radially outward, it does not interfere with the inner wall of the recess 31b.

  As described above, the fastening jig 3C according to the second embodiment has the step portion 31d in the concave portion 31b of the cylinder 31A. The movement of the pilot pin 32 into the recess 31b is restricted by the step portion 31d. Further, the tip of the pilot pin 32 stopped in the recess 31b is used as an anvil. Thereby, the bottom 72 b of the rivet 72, which is a solid rivet or a hollow rivet, can be deformed at the tip of the pilot pin 32. Therefore, the fastening jig 3C according to the second embodiment can fasten the workpiece 1 and the fastened member 2 using solid rivets or hollow rivets.

  When the pilot pin 32 is used as an anvil, a large force acts on the fastening jig 3 </ b> C in a direction away from the workpiece 1 and the fastened member 2. The force at this time is larger than the force with which the magnet 35C of the fastening jig 3C attracts the magnet 53A of the fastening device 5A. Therefore, as shown in FIG. 17, the rear of the fastening jig 3 </ b> C may be supported by the support member 80.

  The support member 80 is made of a magnetic material and is fixed to the base 90 with bolts 41. After positioning and holding the workpiece 1 and the fastened member 2 using the fastening jig 3C, the workpiece 1 and the fastened member 2 are moved to the vicinity of the support member 80 together with the fastening jig 3C. Then, the rear of the fastening jig 3 </ b> C is abutted against the support member 80. The fastening jig 3 </ b> C has a magnet 39 at the bottom of the cylinder 31. The magnet 39 of the fastening jig 3 </ b> C is attracted to the support member 80. Thereby, the to-be-fastened member 2 can be fastened to the workpiece 1 without detaching the fastening jig 3 </ b> C from the workpiece 1 and the to-be-fastened member 2.

  In the second embodiment, the support member 80 is fixed to the base 90 using the bolts 41, but the method of fixing the support member 80 to the base 90 is not limited to this. For example, the support member 80 may be fixed to the base 90 using a magnet, a suction cup, a magic tape (registered trademark), or the like. Accordingly, the support member 80 can be attached to the rear of the fastening jig 3C without moving the workpiece 1.

  1 Workpiece, 1a Through hole, 2 Fastened member, 2a Mounting hole, 3, 3A, 3B, 3C Fastening jig, 5, 5A, 5B Fastening device, 31, 31A Cylinder, 31a Screw hole, 31b Recess, 31c Escape Part, 31d step part, 32, 32A pilot pin, 321 notch, 33a, 33b, 33E, 38 drop prevention claw, 33c convex part, 331a, 331b drop prevention claw guide, 334 pinion gear, 34, 34A, 34B, 34C rod , 341 Rod guide, 35, 35C Magnet (first magnet), 39 Magnet, 53, 53A, 53B Magnet (second magnet), 36 Link mechanism, 361, 362 Arm, 37, 52, 52A, 52B Compression coil Spring, 311 compression coil spring (biasing member), 40 screw, 41 bolt, 51 holding part, 51a space part, 51b opening, 54 chuck, 55 driver, 70, 72 rivet, 70a core rod, 70b bottom, 71 screw, 80 support member, 90 base, G1 first gear, G2 second gear, J1 connecting part, R1, R2 rack .

Claims (8)

A cylinder,
A pilot pin that is disposed in a recess provided in the cylinder and has a tip protruding from one end side in the axial direction of the cylinder;
A fastening jig used when fastening a member to be fastened to a workpiece,
The pilot pin is
A drop-off preventing claw capable of appearing in the radial direction from the side wall of the pilot pin;
A movement mechanism for causing the drop-off prevention claw to protrude from the side wall,
By passing the pilot pin through the through hole of the workpiece and the mounting hole of the member to be fastened and projecting the drop-off preventing claw radially from the side wall of the pilot pin, the member to be fastened becomes the workpiece. Prevent falling out of the
Fastening jig. The moving mechanism is
A rod that protrudes outward in the axial direction from the tip of the pilot pin;
A link mechanism or a rack and pinion mechanism that connects the rod and the drop-off prevention claw;
When the rod protrudes from the tip of the pilot pin, the moving mechanism causes the drop prevention claw to protrude from the side wall of the pilot pin, and when the rod is stored inside the pilot pin. , Storing the drop-off preventing claw inside the pilot pin;
The fastening jig according to claim 1. The pilot pin is capable of moving in the axial direction in the recess and protruding and retracting from the one end side of the cylinder.
The recess has a biasing member that biases the tip of the pilot pin in a direction protruding from the cylinder,
The pilot pin is inserted into the through hole of the workpiece and the attachment hole of the fastened member in a state of protruding from the cylinder,
The pilot pin is pushed into the recess when the tip is pressed in the axial direction.
The fastening jig according to claim 2. A support member attached to the other end side of the cylinder in the axial direction and supporting the cylinder;
The cylinder and the support member are attached by any one of a magnet, a suction cup, and a magic tape.
The fastening jig according to any one of claims 1 to 3. The cylinder has a first magnet on the one end side,
The workpiece and the fastened member positioned on the workpiece are:
Held between the drop-off prevention claw and the surface of the first magnet;
The fastening jig according to any one of claims 1 to 4. A fastening device for fastening the fastened member to the workpiece using the fastening jig according to claim 5,
A holding portion for holding the fastening member, a compression coil spring fixed to the holding portion, and a second magnet attached to the compression coil spring,
The compression coil spring is
Concentrically with the fastening member held by the holding part, it is arranged at a position surrounding the fastening member, and one end side is fixed to the holding part,
The second magnet is
The surface having the magnetic pole attracting the surface of the first magnet is attached to the other end side of the compression coil spring, facing the opposite side to the compression coil spring,
The second magnet holds the workpiece and the fastened member between the surface of the second magnet and the surface of the first magnet by attracting each other to the first magnet. To
Fastening device. The fastening member is a rivet, and the fastening device is a riveting device;
The fastening device according to claim 6. The fastening member is a screw or a bolt, and the fastening device is a nut runner.
The fastening device according to claim 6.

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