JP2007144493A - Method and apparatus for fastening clinch bolt to sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus capable of automating the work to insert the threaded stem part of a clinch bolt through a mounting hole of a sheet and to insert the same into a socket of a clinch die and caulking and coupling. <P>SOLUTION: The mounting hole 2 of the sheet 1 is fitted to a positioning pin part 17b of a guide pin 17 freely vertically slidably fitted into the socket 15 of the clinch die 11 provided with a clinch part 16 at the peripheral edge of an inlet and energized in an axial direction by a push spring 20 to project from the clinch die 11. The clinch bolt 3 made to hold a head 5 is pressed to the end surface of a punch 12. The top end of the threaded stem part 4 thereof is made to abut on the end surface of the positioning pin part 17b to press the clinch bolt 3 in a posture of being held in-between by the punch 12 and the positioning pin part 17b of the guide pin 17 held energized in the axial direction by the push spring 20 to insert the threaded stem part 4 thereof into the socket 15 through the mounting hole 2. Further, the head part 5 is pressed to the sheet 1 by the punch 12 and thereby the peripheral edge portion of the mounting hole 2 is caulked by the clinch part 16 and is fastened to the head part 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method and an apparatus for fixing clinch bolts to a metal plate material.

  In assembling automobile parts, electrical parts, and other various machine parts, a bolt may be fixed to a metal plate in advance, and the other part may be attached with the bolt. Thus, when fixing a bolt to a board | plate material, the method of welding the head part of a volt | bolt to a board | plate material was the mainstream conventionally.

  However, in recent years, the use of clinch bolts that are fixed to the plate by caulking instead of fixing by welding has been increased in consideration of energy saving, working environment, etc., or from the adoption of aluminum alloy plate, stainless steel plate, etc. There is a tendency.

  For example, as shown in FIGS. 14 and 15, the clinch bolt fixing structure is configured such that the screw shaft portion 64 of the clinch bolt 63 is inserted into the mounting hole 62 provided in the plate member 61, and the screw shaft portion 64 is inserted into the clinch die 71. By inserting the clinch bolt 63 into the receiving hole 73 and pressing the head 65 of the clinch bolt 63 with the punch 72, a protrusion 66 projecting from the seating surface of the head 65 and a ring-shaped protrusion 67 provided at the bottom of the neck, With the clinch portion 74 provided at the entrance periphery of the hole 73, the peripheral portion of the mounting hole 62 is caulked and fixed to the head 65, and the clinch bolt 63 secured to the plate member 61 with the caulking joint portion 75 is resistant to pulling and rotation. The power is secured.

  At present, the clinch bolt 63 is fixed to the plate material 61 by inserting the screw shaft portion 64 of the clinch bolt 63 into the mounting hole 62 provided in the plate material 61 and inserting the screw shaft portion 64 into the receiving hole 73 of the clinch die 71. Since the insertion work is performed manually, the work efficiency is low, and improvement in work efficiency is required as the usage amount of the clinch bolt 63 increases.

  The present invention has been made in view of the above circumstances, and a method of fixing a clinch bolt to a plate material capable of automating the operation of inserting the screw shaft portion of the clinch bolt into the mounting hole of the plate material and inserting it into the receiving hole of the clinch die, and An object is to provide an apparatus.

  In addition, the present invention can automatically automate the clinch bolt fixing work by automatically supplying the clinch bolt to the punch, as well as automatically inserting the clinch bolt into the mounting hole of the plate material and the clinch die and the caulking connection. An object of the present invention is to provide a device for fixing clinch bolts to a plate material.

  In order to achieve the above object, the invention according to claim 1 is a method of inserting a screw shaft portion of a clinch bolt into a mounting hole provided in a plate material, and fixing the head portion to the plate material, the screw shaft Of a guide pin that is slidably fitted in the receiving hole of the clinch die having a clinch portion provided at the periphery of the inlet of the receiving hole into which the portion is inserted and is urged in the axial direction by a pressing spring. The mounting hole of the plate material is fitted to the positioning pin portion protruding from the clinch die, and the clinch bolt, which is disposed opposite to the clinch die and holds the head on the end face of the vertically moving punch, is The tip of the screw shaft portion is pressed against the end surface of the positioning pin portion, and the clinch bolt is urged in the axial direction by the punch and the pressing spring to position the guide pin. The screw shaft portion is inserted into the receiving hole through the mounting hole, and the head is pressed against the plate member with the punch. The peripheral portion of the hole is caulked with the clinching portion and fixed to the head portion.

  According to a second aspect of the present invention, in the first aspect of the invention, when the tip of the screw shaft portion of the clinch bolt pressed by the punch comes into contact with the end surface of the positioning pin portion, the corresponding contact portion is opposed to the corresponding contact portion. The axial center of the clinch bolt is aligned with the axial center of the guide pin by the self-aligning action of the positioning convex portion and the concave portion.

  The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the head of the clinch bolt is attracted and held by a magnet embedded in an end face of the punch.

  The invention according to claim 4 is characterized in that, in the invention according to claim 1 or 2, the head of the clinch bolt is adsorbed and held in a vacuum suction port provided on an end face of the punch.

  According to a fifth aspect of the present invention, there is provided a device for inserting a screw shaft portion of a clinch bolt into a mounting hole provided in a plate material and fixing its head portion to the plate material, wherein the screw shaft portion is inserted into the receiving hole. A clinch die having a clinch portion at the periphery, a guide pin that is fitted in the receiving hole so as to be slidable in the vertical direction and is urged in the axial direction by a push spring, and forms a part of the guide pin And a positioning pin portion projecting upward from the clinch die, a punch arranged to face the clinch die and moving up and down, and a bolt provided on an end surface of the punch and holding the head of the clinch bolt Holding means, and after fitting the mounting hole of the plate material to the positioning pin portion, press the clinch bolt in a posture sandwiched between the punch and the positioning pin portion of the guide pin, and A screw shaft portion is inserted into the receiving hole through the mounting hole, and the head portion is pressed against the plate member by the punch, whereby the peripheral portion of the mounting hole is caulked by the clinch portion. It is comprised so that it may adhere to a part.

  The invention according to claim 6 is the invention according to claim 5, wherein the push spring for biasing the guide pin is a cylindrical spring case attached to the bottom of the clinch die substantially coaxially with the receiving hole. It is the structure accommodated.

  The invention according to claim 7 is the magnet according to claim 5 or 6, wherein the bolt holding means is a magnet embedded in an end face of the punch.

  The invention according to claim 8 is the invention according to claim 5 or 6, wherein the bolt holding means is a vacuum suction port provided on an end face of the punch.

  According to a ninth aspect of the present invention, in the invention according to any of the fifth to eighth aspects, an automatic adjustment is provided at a contact position between a tip of the screw shaft portion of the clinch bolt and an end surface of the positioning pin portion of the guide pin. Positioning convex portions and concave portions having a centering action are provided opposite to each other, and the position is corrected so that the axial center of the clinch bolt coincides with the axial center of the guide pin when abutting.

  According to a tenth aspect of the present invention, in the invention according to any of the fifth to ninth aspects, it is easy to fit the mounting hole of the plate material to the positioning pin portion by irradiating the center portion of the end surface of the positioning pin portion with a laser beam. The laser pointer to be provided is provided.

  The invention according to claim 11 and claim 12 is the structure according to any one of claims 5 to 10, wherein a bolt supply means for automatically supplying the clinch bolt is provided at a position near the end face of the punch. .

  According to a thirteenth aspect of the present invention, the bolt supply means according to the twelfth aspect of the present invention is attached to a device that installs the punch in the upside down direction, pushes up the clinch bolt by the punch, and fixes the punch to the plate material. In this configuration, the guide chute is provided with a locking device that prevents the clinch bolt supplied upward from the bolt supply port to the guide chute.

  According to the first aspect of the present invention, in a posture in which the clinch bolt pressed by the punch is sandwiched between the punch and the positioning pin portion of the guide pin, the screw shaft portion penetrates through the mounting hole of the plate material and the clinch die Therefore, the operation of inserting the screw shaft portion of the clinch bolt into the mounting hole and inserting it into the receiving hole of the clinch die can be easily and stably automated.

  According to the invention according to claim 2, when the perpendicularity of the top surface of the head of the clinch bolt that holds the head on the end surface of the punch is not accurate, or the end surface of the punch and the top surface of the head Even if dust, iron powder, etc. intervene between them, the shaft center of the clinch bolt may be slightly tilted, but when the tip of the screw shaft contacts the end surface of the positioning pin, The center action corrects the position of the clinch bolt so that the axis of the clinch bolt coincides with the axis of the guide pin, so that the automatic insertion of the clinch bolt can be performed more reliably.

  According to the invention which concerns on Claim 3 and 4, the head of a clinch bolt can be reliably hold | maintained to the end surface of the said punch with a simple holding means.

  According to the invention of claim 5, the method of the invention of claim 1 is implemented, and the work of inserting the screw shaft portion of the clinch bolt into the mounting hole of the plate material and inserting it into the receiving hole of the clinch die is easy. And it can be stably automated.

  According to the invention which concerns on Claim 6, it is suitable for applying to the automatic insertion operation | work of the clinch bolt with a long screw shaft part.

  According to the invention which concerns on Claim 7 and 8, the head of a clinch bolt can be reliably hold | maintained to the end surface of a punch with a simple holding means.

  According to the ninth aspect of the present invention, even if the axial center of the clinch bolt holding the head on the end surface of the punch is slightly inclined, the tip of the screw shaft portion abuts on the end surface of the positioning pin portion. Then, the self-aligning action corrects the position of the clinch bolt so that the axis of the clinch bolt coincides with the axis of the guide pin, so that the clinch bolt can be automatically inserted more reliably.

  According to the invention which concerns on Claim 10, the attachment hole of a board | plate material can be easily fitted to the positioning pin part of a guide pin.

  According to the invention which concerns on Claim 11 and Claim 12, the fixing operation | work including the automatic insertion operation | work with respect to the attachment hole of the board | plate material of a clinch bolt, and a crimping process is completely carried out by automatically supplying a clinch bolt to the position near the end surface of a punch. It becomes possible to automate.

  According to the invention of claim 13, in the apparatus in which the punch is installed upside down and the clinch bolt is pushed up by the punch and fixed to the plate material, the automatic insertion operation of the clinch bolt into the mounting hole of the plate material In addition, the fixing operation including the caulking process can be stably automated.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows the main part of an apparatus for carrying out the method of the present invention. The apparatus 10 is configured to insert a screw shaft portion 4 of a clinch bolt 3 into a mounting hole 2 provided in a plate material 1 of a metal plate and fix the head portion 5 to the plate material 1 by caulking and coupling. A clinch die 11 fixed to the die holder 13 and a punch 12 disposed opposite to each other above the clinch die 11 are provided. The punch 12 is attached to a press ram (not shown) via a punch holder 14 and moves up and down to approach and separate from the clinch die 11.

  The tip of the screw shaft portion 4 of the clinch bolt 3 is formed in a conical convex portion 6 for position correction by an automatic aligning action described later. Further, a projection 7 and a ring-shaped projection 8 for caulking and coupling are provided on the bottom surface and the lower neck portion of the head 5.

  The clinch die 11 is provided with a receiving hole 15 into which the screw shaft portion 4 of the clinch bolt 3 is inserted. The receiving hole 15 has an inner diameter slightly larger than that of the screw shaft portion 4 in the vicinity of the inlet of the large-diameter hole 15a having an inner diameter considerably larger than the outer diameter of the screw shaft portion 4 in order to fit a guide pin 17 described later. A small-diameter hole 15b is formed, and a clinch portion 16 is provided around the inlet periphery of the small-diameter hole 15b.

  The guide pin 17 has a large-diameter base portion 17a that is slidably fitted in the large-diameter hole 15a of the receiving hole 15, and is protruded from the base portion 17a and is slidably fitted in the small-diameter hole 15b of the receiving hole 15. A small-diameter positioning pin portion 17b to be mounted, and the end surface of the positioning pin portion 17b engages with a convex portion 6 at the tip of the screw shaft portion 4 as will be described later, and a clinch bolt is automatically aligned. A conical recess 18 is provided to correct the position of 3. A cylindrical spring case 19 having an inner diameter substantially the same as the large-diameter hole 15 a of the receiving hole 15 is attached to the bottom of the clinch die 11 coaxially with the receiving hole 15 and is received in the spring case 19. The guide pin 17 is urged upward in the axial direction by the push spring 20 fitted in the large-diameter hole 15 a of the hole 15, and the positioning pin portion 17 b protrudes above the clinch die 11.

  A bolt holding recess 21 that engages the head 5 of the clinch bolt 3 is provided on the lower end surface of the punch 12, and a magnet 22 that attracts and holds the head 5 is embedded inside the bolt holding recess 21. ing. The means for holding the head 5 of the clinch bolt 3 on the end face of the punch 12 is not limited to the magnet 22, and instead of the magnet 22, for example, as illustrated in FIG. A vacuum suction port 23 is provided in the back, and a passage 24 communicating with the vacuum suction port 23 is provided in the punch 12 so as to be sucked and held by a suction force of a vacuum pump (not shown) via a suction hose 25 connected to the passage 24. It may be.

  On the other hand, a laser pointer 26 is installed on the side of the punch 12. The laser pointer 26 is provided to irradiate a laser beam to the center of the upper end of the positioning pin portion 17b of the guide pin 17 so that the mounting hole 2 of the plate 1 can be easily fitted into the positioning pin portion 17b.

  Next, an operation process for fixing the clinch bolt 3 to the plate 1 with the apparatus shown in FIG. 1 will be described with reference to FIG.

  FIG. 2A shows a work preparation process. The clinch bolt 3 engages the head 5 with the holding recess 21 at the tip of the punch 12 and is attracted and held by the magnet 22, but iron powder or dust is present on the top surface of the head 5, or the head 5 If the squareness of the top surface (with respect to the axis) is not accurate, the axial center of the clinch bolt 3 may be held by being slightly inclined with respect to the center line of the punch 12 as shown in the figure. On the other hand, the plate member 1 is easily and quickly fitted into the positioning pin portion 17b by moving the plate member 1 to a position where the laser beam of the laser pointer 26 is applied to the attachment hole 2, as shown in FIG. Thus, it is mounted on the upper surface of the clinch die 11. In this state, the punch 12 descends, and as shown in FIG. 2 (c), when the convex portion 6 at the tip of the screw shaft portion 4 comes into contact with the end surface of the positioning pin portion 17b, it engages with the conical concave portion 18, By the self-aligning action, the position of the clinch bolt 3 is corrected so that the axis of the clinch bolt 3 coincides with the axis of the guide pin 17. When the position of the axial center of the clinch bolt 3 is corrected, the positioning pin portion 17b of the guide pin 17 in which the clinch bolt 3 is urged upward by the punch 12 and the push spring 20 as shown in FIG. The clinch bolt 3 is pushed down by the punch 12 and the screw shaft portion 4 passes through the mounting hole 2 of the plate 1 and is inserted into the small-diameter hole 15b of the receiving hole 15, and further against the pressing spring 20. Then, the screw shaft portion 4 is inserted into the large-diameter hole 15a of the receiving hole 15 while pushing down the guide pin 17, and the head 5 of the clinch bolt 3 is attached to the plate 1 by the punch 12 as shown in FIG. When pressed, the peripheral portion of the mounting hole 2 is caulked by the clinch portion 16 of the clinch die 11, the projection 7 and the ring protrusion 8 provided on the seating surface and the neck lower portion of the head 5, and It is fixed.

  By the operation steps as described above, the operation of inserting the clinch bolt 3 into the mounting hole 2 of the plate 1 and the clinch die 11 and the caulking connection can be automated.

  FIG. 4 shows a bolt that automatically supplies the clinch bolt 3 to a predetermined position below the end face of the punch 12 in addition to the insertion operation of the clinch bolt 3 to the mounting hole 2 of the plate material 1 and the clinch die 11 and the automation of the caulking connection. A supply device 30 is shown.

  The bolt supply device 30 is fixed to the punch holder 14 and is arranged in parallel with the punch 12. The bolt 30 is attached to the guide post 31 so as to be axially slidable. A movable support 32 extending in the right-and-left lateral direction, a coil spring 33 that is fitted to the guide post 31 and biases the movable support 32 toward the end face of the punch 12, and the punch 12 provided on the movable support 32. Is inserted through and fixed to the lower side of the movable support 32. The punch insertion hole 34 that moves up and down and the punch through hole 34 that penetrates the movable support 32 is provided. A guide chute 36 for individually transferring the clinch bolt 3 supplied through the bolt supply port 35 to a predetermined position in the vicinity of the end face of the punch 12; A transfer passage 37 for guiding and transferring the clinch bolt 3 engaged with 5, a punch guide portion 38 provided at the front end portion of the guide chute 36, through which the punch 12 penetrating the punch insertion hole 34 is slidably guided, and a guide A pusher 39 that is reciprocally mounted along a transfer passage 37 of the chute 36 and an air cylinder 40 that is fixed to the rear end portion of the guide chute 36 and operates the pusher 39 are provided.

  The movable support body 32 is fitted to the guide post 31 with a guide cylinder 41 fixed to the front end portion thereof, and is slidably mounted in the axial direction. The movable support body 32 is inserted from the front end of the movable support body 32 to the guide cylinder body 41. The attached latching pin 42 is engaged with an engaging groove 43 provided in the side surface of the guide post 31 and extending in the axial direction so that the axial sliding range with respect to the guide post 31 is limited, and the coil spring 33 is used. It is biased downward (on the punch end face side).

  A curved supply chute 44 is connected to the bolt supply port 35. The inlet end of the supply chute 44 is connected to one end of a connection pipe 46 fixedly supported by a support column 45 erected at the rear end of the movable support 32, and is connected to the other end of the connection pipe 46. The clinch bolt 3 continuously fed by air pressure through the hose 47 is continuously supplied to the bolt supply port 35 through the supply chute 44.

  As shown in FIG. 5, the pusher 39 has flange portions 48, 48 engaged with guide step portions 37 a, 37 a formed on both sides of the upper surface of the transfer passage 37 of the guide chute 36 on both sides of the upper surface of the prismatic main body. A guide inclined surface 49 for guiding the clinch bolt 3 is provided on the front end surface.

  6 to 9 show an operation process in which the bolt supply device 30 having the above configuration is attached to the device 10 shown in FIG. 1 to fix the clinch bolt 3 to the plate 1.

  FIG. 6 shows that the pusher 39 of the bolt supply device 30 moves forward, pushes the clinch bolt 3 supplied from the bolt supply port 35 to the guide chute 36 along the transfer passage 37 and transfers it to a predetermined position below the end face of the punch 12. And the supply state attracted and held by the magnet 22 is shown. At this time, the plate 1 is placed on the upper surface of the clinch die 11 with the mounting hole 2 fitted to the positioning pin portion 17b (see FIG. 2B). In this state, when the punch 12 is lowered together with the bolt supply device 30 and the punch guide portion 38 of the guide chute 36 is pressed against the plate material 1, the lowering of the movable support 32 stops as shown in FIG. However, the punch 12 further descends along the punch guide portion 38, and the convex portion 6 at the tip of the screw shaft portion 4 of the clinch bolt 3 engages with the conical concave portion 18 of the positioning pin portion 17b. It is the same as the work process of FIG. 2C and FIG. 2D that the position is corrected by the action so that the axis of the clinch bolt 3 coincides with the axis of the guide pin 17. When the axial center of the clinch bolt 3 is corrected in this manner, the clinch bolt 3 is positioned by the punch 12 and the positioning pin of the guide pin 17 urged upward by the push spring 20 as shown in FIG. The screw shaft 4 is pushed down by the punch 12 in a posture sandwiched by the portion 17b, and the screw shaft portion 4 passes through the mounting hole 2 of the plate 1 and is inserted into the small-diameter hole 15b of the receiving hole 15 (see FIG. 2D). . Further, when the clinch bolt 3 is pressed by the punch 12, as shown in FIG. 9, the guide pin 17 is pushed down against the pressing spring 20, and the screw shaft portion 4 is inserted into the large diameter hole 15 a of the receiving hole 15. Subsequently, the head 5 is pressed against the plate 1 by the punch 14, and the peripheral portion of the mounting hole 2 of the plate 1 is caulked by the clinch portion 16 of the clinch die 11 and fixed to the head 5 as shown in FIG. It is the same as the work process of (e).

  As described above, when the bolt supply device 30 shown in FIG. 4 is attached to the device shown in FIG. 1, the insertion work of the clinch bolt 3 to the mounting hole 2 of the plate material 1 and the clinch die 11 and the caulking coupling are automated, The clinch bolt 3 can be automatically supplied to the punch 12, and the fixing operation of the clinch bolt 3 can be completely automated.

  On the other hand, in the case where the plate material 1 is formed and processed at the same time as the press working progressive die, and the clinch bolt 3 is inserted and fixed in the punched mounting hole 2, as shown in FIG. And the punch 12 are installed upside down, and the clinch bolt 3 is pushed up by the punch 12, and the screw shaft portion 4 is inserted into the mounting hole 2 and inserted into the clinch die 11 positioned on the upper side to be connected by caulking. is there. When the bolt supply device 30 shown in FIG. 4 is attached to such a reverse device 10, the clinch bolt 3 that is supplied upward from the bolt supply port 35 to the guide chute 36 through the supply chute 44 is supplied by its own weight. It falls into the inside and cannot be pushed out by the pusher 39. In such an embodiment, as shown in FIGS. 11 to 13, a locking device 50 is provided on the guide chute 36 in order to prevent the clinch bolt 3 from falling.

  The locking device 50 includes a locking member 51 that is fitted on the side wall of the guide chute 36 adjacent to the bolt supply port 35 so as to be slidable in the lateral direction perpendicular to the transfer passage 37. The locking member 51 is urged so that the front end surface 52 protrudes into the transfer passage 37 by a spring 54, and a guide recess 53 is provided at an upper end portion intersecting with one guide step portion 37 a of the transfer passage 37. Yes. The spring 54 is inserted and accommodated in an accommodation hole 55 provided in the rear portion of the locking member 51, and the rear end is held in contact with and supported by a support member 56 attached to the outer surface of the guide chute 36. The stop member 51 is urged so that the front end face 52 projects into the transfer passage 37. As shown in FIG. 10, the clinch bolt 3 pushed up from the bolt supply port 35 through the supply chute 44 and supplied to the transfer passage 37 of the guide chute 36 has a screw shaft portion 4 as shown in FIG. The front end surface 52 of the locking member 51 is supported so as to press against the side wall surface of the transfer passage 37, and the head 5 is pressed and supported by the guide concave portion 53 and the concave portion 37b provided in the guide step portion 37a. Falling on the chute 44 is prevented. In this state, the pusher 39 advances to push out the clinch bolt 3 along the transfer passage 37, transfer it to a predetermined position above the end face of the punch 12, and attract and hold it by the magnet 22. Hereinafter, the work process of fixing the clinch bolt 3 to the plate member 1 is performed in a posture in which the clinch die 11 and the punch 12 shown in FIGS.

It is a vertical front view of the principal part of the apparatus which adheres a clinch bolt to the board | plate material by this invention. It is explanatory drawing which shows the work process of an apparatus same as the above, (a) is a work preparation process, (b) is a board | plate material position fitting process, (c) is a clinch bolt position correction process, (d) is a clinch bolt insertion process. (E) shows the crimping process of the clinch bolt. It is a vertical front view which shows another embodiment of an apparatus same as the above. It is a principal part vertical front view of the volt | bolt supply apparatus attached to an apparatus same as the above. The pusher of a bolt supply device same as the above is shown, (a) is a top view, (b) is a longitudinal front view, (c) is a left side view, and (d) is a right side view. It is a principal part longitudinal cross-sectional front view which shows the operation | work process of this invention apparatus which attached the bolt supply apparatus installation of FIG. It is a principal part longitudinal section front view which shows the work process of this invention apparatus same as the above. It is a principal part longitudinal section front view which shows the work process of this invention apparatus same as the above. It is a principal part longitudinal section front view which shows the work process of this invention apparatus same as the above. It is a principal part longitudinal cross-sectional front view which shows another embodiment of this invention apparatus which attached the bolt supply apparatus installation of FIG. It is a top view of the guidance chute of an apparatus same as the above. It is sectional drawing which follows the 12-12 line of FIG. It is an enlarged plan view which shows the use condition of a guide chute same as the above. It is a principal part longitudinal section front view which shows the adhering method of the conventional clinch bolt. It is a principal part longitudinal front view which shows the adhering structure of a clinch bolt and a board | plate material same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Board | plate material 2 Mounting hole 3 Clinch bolt 4 Screw shaft part 5 Head part 6 Convex part 10 Apparatus 11 Clinch die 11
DESCRIPTION OF SYMBOLS 12 Punch 13 Die holder 14 Punch holder 15 Receiving hole 15a Large diameter hole 15b of receiving hole 15 Small diameter hole of receiving hole 15 16 Clinch part 17 Guide pin 17a Base part of guide pin 17 17b Positioning pin part of guide pin 17 18 Concave part 19 Spring case DESCRIPTION OF SYMBOLS 20 Push spring 21 Bolt holding recessed part 22 Magnet 23 Vacuum suction port 25 Suction hose 26 Laser pointer 30 Bolt supply apparatus 31 Guide post 32 Movable support 33 Coil spring 34 Punch insertion hole 35 Bolt supply port 36 Guide chute 37 Transfer path 37a Guide stage Part 38 Punch guide part 39 Pusher 40 Air cylinder 44 Supply chute 47 Feed hose 48 Flange part 49 Guide inclined surface 50 Locking device 51 Locking member 52 Front end surface 53 Guide recess 54 Spring 55 Housing hole 56 Support member

Claims (13)

It is a method of inserting the screw shaft portion of the clinch bolt into the mounting hole provided in the plate material, and fixing its head to the plate material,
A clinch part is provided around the inlet periphery of the receiving hole into which the screw shaft part is inserted. The clinch die is slidably fitted in the receiving hole and is urged in the axial direction by a push spring. Fit the mounting hole of the plate material to the positioning pin part protruding from the clinch die of the guide pin,
The clinch bolt, which is disposed facing the clinch die and holds the head on the end surface of the vertically moving punch, is pressed by the punch, and the tip of the screw shaft portion abuts against the end surface of the positioning pin portion. Contact
The clinch bolt is pressed in a posture sandwiched between the punch and the positioning pin portion of the guide pin that is urged in the axial direction by the pressing spring, and the screw shaft portion passes through the mounting hole and passes through the mounting hole. Insert it into the receiving hole,
Further, the clinch bolt is fixed to the plate material, wherein the head portion is pressed against the plate material by the punch, and the peripheral portion of the attachment hole is caulked by the clinching portion to be fixed to the head portion.   When the tip of the screw shaft portion of the clinch bolt pressed by the punch comes into contact with the end face of the positioning pin portion, automatic alignment between the positioning convex portion and the concave portion provided opposite to each corresponding contact portion 2. The method of securing a clinch bolt to a plate material according to claim 1, wherein the clinch bolt has an axial center aligned with the guide pin.   3. The method of fixing a clinch bolt to a plate material according to claim 1, wherein the head of the clinch bolt is attracted and held by a magnet embedded in an end face of the punch.   3. The method of fixing a clinch bolt to a plate material according to claim 1, wherein the head of the clinch bolt is adsorbed and held in a vacuum suction port provided on an end face of the punch. A device for inserting a screw shaft portion of a clinch bolt into a mounting hole provided in a plate material, and fixing its head to the plate material,
A clinch die in which a clinch portion is provided at the inlet periphery of the receiving hole for inserting the screw shaft portion;
A guide pin fitted in the receiving hole so as to be slidable in the vertical direction and biased in the axial direction by a push spring;
A positioning pin portion that forms a part of the guide pin and protrudes from the clinch die; a punch that is disposed to face the clinch die and moves up and down;
A bolt holding means provided on an end face of the punch and holding the head of the clinch bolt; and
After fitting the mounting hole of the plate material to the positioning pin portion, the clinch bolt is pressed in a posture sandwiched between the punch and the positioning pin portion of the guide pin, and the screw shaft portion is inserted into the mounting hole. It penetrates and is inserted into the receiving hole, and further, the peripheral portion of the mounting hole is caulked by the clinching portion and fixed to the head by pressing the head against the plate with the punch. A device to fix clinch bolts to the plate material.   6. The plate material according to claim 5, wherein the push spring for urging the guide pin is housed in a cylindrical spring case attached to the bottom of the clinch die substantially coaxially with the receiving hole. Fixing device.   The device for fixing a clinch bolt to a plate material according to claim 5 or 6, wherein the bolt holding means is a magnet embedded in an end face of the punch.   The apparatus for fixing a clinch bolt to a plate material according to claim 5 or 6, wherein the bolt holding means is a vacuum suction port provided on an end face of the punch.   Positioning convex portions and concave portions having a self-aligning action are provided opposite to each other at a contact portion between the tip end of the screw shaft portion of the clinch bolt and the end surface of the positioning pin portion of the guide pin. 9. The apparatus for fixing a clinch bolt to a plate material according to claim 5, wherein the clinch bolt is positioned so that an axis of the clinch bolt coincides with an axis of the guide pin.   The plate material according to any one of claims 5 to 9, wherein a laser pointer is provided to irradiate a laser beam to a central portion of the end surface of the positioning pin portion so that the mounting hole of the plate material can be easily fitted into the positioning pin portion. A device to fix clinch bolts.   The apparatus for fixing a clinch bolt to a plate material according to any one of claims 5 to 10, wherein a bolt supply means for automatically supplying the clinch bolt is provided in the vicinity of an end face of the punch.   The bolt supply means is fixed to a punch holder to which the punch is attached, is arranged in parallel with the punch, and is attached to the guide post so as to be axially slidable, and with respect to the guide post A movable support that extends in the lateral direction, a spring that is fitted to the guide post and biases the movable support toward the end face of the punch, and the punch provided on the movable support penetrates vertically. A punch insertion hole, a bolt supply port provided through the movable support and continuously supplying the clinch bolt, and the clinch supplied and fixed to the movable support through the bolt supply port. A guide chute for individually transferring bolts to a predetermined position near the end face of the punch, and provided on the guide chute, the clinch bolt is engaged with its head. A transfer passage for guiding and transferring, a punch guide portion provided at a front end portion of the guide chute and slidably guided by the punch 12 passing through the punch insertion hole, and the clinch bolts extending along the transfer passage. An apparatus for adhering clinch bolts to a plate material according to claim 11, further comprising an extruding mechanism for extruding to a position. The bolt supply means described in claim 12 is attached to a device that installs the punch upside down and pushes up the clinch bolt by the punch and adheres to the plate material,
A locking device that locks and holds the head of the clinch bolt that is supplied upward from the bolt supply port to the guide chute and prevents the clinch bolt from falling to the bolt supply port is provided on the guide chute. A device for fixing clinch bolts to the plate material provided.

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