JP2016221657A - Piercing nut driving upper die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piercing nut driving upper die for driving a piercing nut into a tabular work-piece.SOLUTION: A piercing nut driving upper die which is so supported on a punch holder in a punch press as to be vertically movable comprises: on a punch body 5 which is so supported by the punch holder 3 as to be vertically movable, a vertically movable punch 11 for driving a piercing nut 25 supplied to a lower side of the punch body 5 into a work-piece W; on the punch body 5, a rotatable nut conveyance plate 27 which conveys the piercing nut 25 in a piercing nut storage part 21 provided on the punch body 5 to a lower position of the punch 11; and an intermittent rotation mechanism 61 for intermittently rotating the nut conveyance plate 27 in one direction, and further comprises an actuator 57, which drives the intermittent rotation mechanism 61, on the punch body 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an upper mold for driving a pierce nut into, for example, a plate-shaped workpiece, and more particularly to a pierce nut driving upper mold that can suppress the vertical dimension of the upper mold to be short.

  Conventionally, when screw holes are formed in a plate-shaped workpiece, burring processing is performed on the workpiece, and tapping processing is performed on a cylindrical portion protruding and formed by this burring processing. However, when the thickness of the workpiece is too thin, or when the material strength is insufficient like an aluminum plate, it is difficult to form a screw hole by performing burring. Therefore, in this case, a caulking nut or a pierce nut is attached to a thin workpiece.

  As described above, when a pierce nut or a caulking nut is attached to a workpiece, the workpiece is pressed by a punch press or the like, and the workpiece is divided into necessary blanks. And attaching a pierce nut to a blank with a pierce nut driving device of another process, or welding a nut is performed. Therefore, there are problems that a plurality of processing machines are required and the process is complicated.

  In view of this, an upper mold has been proposed in which a workpiece can be pressed by a punch press and then a pierce nut can be driven and attached to the workpiece by the same punch press (see, for example, Patent Document 1).

US Pat. No. 5,161,303 Specification

  In Patent Document 1, a nut provided in a kinaster body is conveyed and positioned at a position below a punch provided in the kinaster body by a planetary gear that is rotatably provided in the canister body. An upper die having a structure in which the nut is driven into a plate-like workpiece by the punch is disclosed. In the configuration described in Patent Document 1, the configuration in which the planetary gear is rotated is configured such that when a cylindrical enclosure member provided integrally with the punch moves up and down, a cam provided rotatably in the enclosure member. The cam follower pin provided in the surrounding member moves up and down in the guide track provided on the outer peripheral surface of the cam, thereby rotating the cam. The rotation of the cam is transmitted to the planetary gear. That is, in the configuration described in Patent Document 1, the cam is rotated using the vertical movement of the punch, and the rotation of the cam is transmitted to the planetary gear.

  Therefore, in order to rotate the cam by a predetermined angle, the vertical stroke of the punch needs a predetermined length. Therefore, when the vertical height of the upper mold becomes large and the vertical stroke of the striker (ram) provided in the punch press is small (short), it may be difficult to use.

  The present invention has been made in view of the above-described problems, and is a pierce nut driving upper die supported by a punch holder in a punch press so as to be movable up and down, and is supported by the punch holder so as to be movable up and down. A punch body is provided with a punch for driving a pierce nut supplied to the lower side of the punch body into the workpiece so as to be movable up and down, and a pierce nut in a pierce nut housing portion provided in the punch body is provided below the punch. A nut conveying plate for conveying to a position, the punch body being rotatably provided, an intermittent rotating mechanism for intermittently rotating the nut conveying plate in one direction, and for driving the intermittent rotating mechanism An actuator is provided in the punch body.

  Further, in the upper die for driving the pierce nut, a rotation shaft for rotating the nut conveying plate is rotatably provided in the punch body, and a rotation transmission member provided rotatably on the rotation shaft and the rotation shaft A one-way clutch is provided between the punch bodies, and a fluid pressure cylinder as an actuator for rotating the rotation transmitting member is provided in the punch body.

  In the pierce nut driving upper mold, the rotation shaft for rotating the nut conveying plate is provided at an eccentric position of the punch body, and the pierce nut housing portion is centered on the rotation shaft. It is characterized by being provided on a circle.

  Further, a pierce nut driving upper die supported by a punch holder in a punch press so as to be movable up and down, and a rotatable sleeve rotatably supported by the punch holder is integrally rotatable with the rotatable sleeve, and A punch body supported by the rotary sleeve so as to be movable up and down; a punch for driving a pierce nut supplied to the lower side of the punch body into the workpiece; A nut transport plate for transporting a pierce nut in a pierce nut housing portion provided in the body to a position below the punch is rotatably provided below the punch body, and the transport plate is intermittently rotated in one direction. It is provided with the intermittent rotation mechanism for doing.

  In the upper pierce nut driving mold, the nut conveying plate is composed of a rotatable planetary gear provided with a nut receiving hole for receiving a pierce nut supplied from the pierce nut housing portion. The gear is characterized in that it is reciprocally meshed with an internal gear provided at the lower part of the punch body.

  According to the present invention, the upper die for driving a pierce nut is provided with an intermittent rotation mechanism for intermittently rotating a nut conveyance plate for conveying the pierce nut to a position below the punch in one direction, and this intermittent rotation. Since the punch body is provided with an actuator for driving the mechanism, the nut conveying plate can be rotated by a desired angle regardless of the vertical stroke length of the punch in the pierce nut driving upper die. That is, even when the striker has a short vertical stroke in the punch press, it can be easily handled.

It is a section explanatory view showing the composition of the upper die for piercing nut driving concerning the 1st embodiment of the present invention. It is a plane cross section explanatory drawing which shows the arrangement | positioning relationship of the punch with which the punch body in the upper metal mold | die was equipped, the rotating shaft, and the pierce nut accommodating part. It is a plane explanatory view of a nut conveyance plate. It is a plane explanatory view of a nut support plate. It is a plane explanatory view of a nut holding member. It is a plane explanatory view of a punch body. It is explanatory drawing of an actuator. It is a section explanatory view showing the composition of the upper metallic mold concerning a 2nd embodiment of the present invention. It is sectional explanatory drawing along the IX-IX line in FIG. It is sectional explanatory drawing which shows the structure of the upper metal mold | die which concerns on the 3rd Embodiment of this invention. It is a plane cross-sectional explanatory drawing of the punch body in the upper metal mold | die which concerns on 3rd Embodiment. It is explanatory drawing of an internal gear. It is plane explanatory drawing which shows the relationship between a nut support plate and a planetary gear. It is a plane cross-section explanatory drawing which showed the arrangement | positioning relationship of the several nut accommodating part (hole) with which the punch body was equipped, the punch, the nut support plate, the nut receiving hole with which the planetary gear was equipped, and an internal gear.

  Referring to FIG. 1, a pierce nut driving upper die 1 (hereinafter referred to as an upper die) according to a first embodiment of the present invention is a punch in, for example, a turret punch press (not shown). A punch body 5 supported by an upper turret as the holder 3 so as to be movable up and down is provided. More specifically, the punch body 5 is supported with respect to the punch holder 3 by a lifter spring 9 interposed between the flange portion 7 provided on the upper portion of the punch body 5 and the punch holder 3. Has been.

  The punch body 5 has a circular cross section, and a punch 11 is provided at the center (axial center) of the punch body 5 so as to be movable up and down. A punch head 13 is integrally provided at the upper end of the punch 11 protruding upward from the upper surface of the punch body 5. The punch head 13 is supported on the upper surface of the punch body 5 by a support member 17 urged upward by an elastic member 15 such as a coil spring. Therefore, the punch 11 is supported by being always urged upward by the elastic member 15.

  The punch body 5 is rotatably provided with a rotation shaft 19 perpendicular to a position eccentric from the punch 11. As shown in FIG. 2, the punch body 5 on the circle passing through the axial center of the punch 11 with the axial center of the rotating shaft 19 as a center has a hole in which the punch 11 is fitted in a vertically movable manner. Including a plurality of holes 21 are provided at equal intervals. In a plurality of holes 21 excluding the holes into which the punches 11 are inserted, pipe materials 23 made of, for example, fluororesin having a small friction coefficient are arranged. A plurality of pierce nuts (caulking nuts) 25 are accommodated in the hole 21, that is, the pipe member 23. Accordingly, each hole 21 constitutes a pierce nut housing portion that houses a plurality of pierce nuts 25.

  In order to convey the pierce nuts 25 accommodated in the holes (pierce nut accommodating portions) 21 one by one to the lower position of the punch 11, a nut conveying plate 27 is provided at the lower end of the rotary shaft 19. Are provided to rotate integrally. More specifically, a lower surface cover 29 that covers the entire lower surface of the punch body 5 is detachably attached to the lower portion of the punch body 5 through appropriate attachments 31 such as a plurality of attachment bolts. A nut support plate 33 for preventing nut dropping is provided on the upper surface of the lower cover 29, and the nut transport plate 27 is horizontally disposed between the nut support plate 33 and the lower surface 5A of the punch body 5. It is provided to be freely rotatable.

  The nut conveying plate 27 is formed in a disk shape as shown in FIG. The nut transport plate 27 is provided with a plurality of nut receiving holes 35 for receiving the pierce nuts 25 in the holes 21. The plurality of nut receiving holes 35 are provided on the same circle as the circle on which the holes 21 are arranged at the same pitch as the holes 21. In order to rotate the nut transport plate 27, the nut transport plate 27 is provided with a plurality of engagement holes 37.

  In order to rotate the nut conveying plate 27, a rotation transmission member 41 having an engaging pin 39 (see FIG. 1) that can be engaged with the engaging hole 37 is provided on the lower side of the punch body 5. It is provided so that it can rotate freely. The lower end portion of the rotation shaft 19 and the upper end portion of the rotation transmission member 41 are appropriately interlocked so as to transmit the rotation of the rotation shaft 19 to the rotation transmission member 41.

  With the above configuration, when the rotary shaft 19 is rotated, the nut transport plate 27 is integrally rotated via the rotation transmission member 41. At this time, each nut receiving hole 35 provided in the nut conveying plate 27 passes below the respective holes 21 provided in the punch body 5 and passes below the punch 11. When the nut receiving holes 35 pass below the holes 21, the pierce nuts 25 are supplied to the empty nut receiving holes 35.

  The nut support plate 33 supports the pierce nut 25 received (accommodated) in each nut receiving hole 35 of the nut transport plate 27 so as to be smoothly slidable. For example, the friction coefficient is reduced by using a fluororesin or the like. Then, at a position corresponding to the punch 11 of the nut support plate 33, the pierce nut 25 accommodated in the nut receiving hole 35 of the nut transport plate 27 and transported to the position below the punch 11 can be dropped downward. A through hole 43 (see FIG. 4) is formed. Accordingly, the pierce nut 25 conveyed to the upper side of the through hole 43 (below the punch 11) by the nut receiving hole 35 of the nut conveying plate 27 is dropped into the through hole 43 of the nut support plate 33. It will be.

  A nut holding member 45 is provided below the through hole 43 so that the pierce nut 25 dropped into the through hole 43 of the nut support plate 33 is held in the through hole 43. More specifically, a bush 47 is provided at a position corresponding to the punch 11 of the lower surface cover 29, and the nut holding member 45 is interposed between the upper surface of the bush 47 and the lower surface of the nut support plate 33. It is arranged.

  As shown in FIG. 5, the nut holding member 45 is formed in a ring shape by an elastic member such as a resin plate. The diameter of the inner circle 45 </ b> A in the nut holding member 45 is formed smaller than the diameter of the circumscribed circle of the pierce nut 25. In order to allow the pierce nut 25 on the nut holding member 45 to pass downward, a plurality of slits 45B are formed radially outward on the periphery of the inner circle 45A of the nut holding member 45. It is.

  Accordingly, the pierce nut 25 in the through hole 43 of the nut support plate 33 is supported by the nut holding member 45. As described above, the pierce nut 25 held in the through hole 43 of the nut support plate 33 is struck by the punch tip 49 provided at the lower end portion of the punch 11 so that the die is formed below the punch body 5. The pierce nut 25 can be driven into the plate-like workpiece W supported by (not shown).

  As described above, the punch 11 is supported by the elastic member 15 and the support member 17 so as to be movable up and down. The punch press is provided with a striker 51 so as to be movable up and down in order to press the punch head 13 in the upper die 1 placed at the machining position. The striker 51 is provided with a fluid ejection port 53 that ejects a working fluid such as compressed air downward. The fluid ejection port 53 is freely connectable to a receiving port 55 provided in the punch head 13.

  An actuator 57 such as a fluid pressure cylinder is connected to the receiving port 55 via a pipe 59. The actuator 57 constitutes a part of an intermittent rotation mechanism 61 for intermittently rotating the nut transport plate 27 in one direction via the rotary shaft 19. More specifically, when the compressed air is supplied to the actuator 57, the piston rod 57P (see FIG. 7) projects, and when the compressed air is discharged, the piston rod 57P is returned to its original position by an internal return spring (not shown). It is constituted by an air cylinder of a type that returns to the position.

  A reciprocating block 62 is integrally attached to the piston rod 57P, and a rack 63 is integrally attached to the reciprocating block 62. The rack 63 meshes with a pinion 65 (see FIGS. 1 and 6) provided at the upper end of the rotary shaft 19. The pinion 65 is integrally provided on a rotation transmission member 67 provided at the upper end of the rotary shaft 19 so as to be rotatable in one direction. A one-way clutch 69 is provided between the rotation transmission member 67 and the rotating shaft 19. The one-way clutch 69 idles the pinion 65 in the reverse direction with respect to the rotary shaft 19 when the piston rod 57P of the actuator 57 protrudes. When the piston rod 57P returns to the original position, the pinion 65 The rotating shaft 19 is configured to rotate in one direction by a certain rotation angle.

  As already understood, when the piston rod 57P in the actuator 57 reciprocates, the nut conveying plate 27 is intermittently rotated in one direction via the pinion 65 and the rotating shaft 19. The intermittent rotation of the nut conveying plate 27 is intermittent so that each nut receiving hole 35 provided in the nut conveying plate 27 is temporarily stopped at a position corresponding to each hole (pierce nut accommodating portion) 21 and the punch 11. It will be rotated.

  Accordingly, the pierce nut 25 is received from the hole 21 into the empty nut receiving hole 35 in the nut conveying plate 27. When the nut transport plate 27 is intermittently rotated in one direction, the nut receiving hole 35 that receives the pierce nut 25 is intermittently positioned at a position below the punch 11. Then, the pierce nut 25 in the nut receiving hole 35 positioned at a position corresponding to the punch 11 (a position on the lower side of the punch 11) is dropped into the through hole 43 of the nut support plate 33, and the nut holding member 45 Retained.

  As described above, when the nut conveying plate 27 is intermittently rotated in one direction and temporarily stopped, the punch head 13 is struck by the striker 51 in the punch press. When the punch head 13 is struck, the punch tip 49 provided in the punch 11 passes through the through hole 43 in the nut support plate 33, and pierces the pierce nut 25 in the through hole 43. The pierce nut 25 is attached to the workpiece W.

  As described above, when the striker 51 strikes the punch head 13, the fluid ejection outlet 53 provided in the striker 51 and the receiving port 55 provided in the punch head 13 are connected. Therefore, when the punch head 13 is pressed by the striker 51 and lowered, the working fluid is supplied to the actuator 57. Therefore, the piston rod 57P of the actuator 57 is operated to project, and the pinion 65 is idled in the reverse direction with respect to the rotating shaft 19.

  Thereafter, when the striker 51 is returned to the original raised position, the striker 51 is detached from the punch head 13 when the punch tip 49 provided on the punch 11 is raised to a height at which the punch tip 49 is removed from the nut receiving hole 35 of the nut conveying plate 27. It will be. Therefore, when the rack 63 is returned to the original position by the return spring built in the actuator 57, the pinion 65 is rotated in one direction. The rotation of the pinion 65 in one direction is transmitted to the rotary shaft 19 via the one-way clutch 69. Therefore, the nut conveying plate 27 is intermittently rotated in one direction, and the next adjacent nut receiving hole 35 receiving the pierce nut 25 is rotated and positioned at a position corresponding to the punch 11.

  As understood from the above description, according to the present embodiment, the supply and exhaust of compressed air to the actuator 57 provided on the upper surface of the punch body 5 are performed in conjunction with the vertical movement of the striker 51 in the press. 57 is reciprocated. Then, the nut conveying plate 27 is intermittently rotated in association with the reciprocating operation of the actuator 57, and the supply of the pierce nut 25 to the lower position of the punch 11 is intermittently performed. Therefore, according to the present embodiment, the vertical dimension of the upper die 1 for driving the pierce nut can be suppressed, and even when the vertical stroke length of the striker 51 is short, it can be easily applied.

  FIG. 8 is an explanatory cross-sectional view showing a configuration of a pierce nut driving upper mold 1B according to the second embodiment of the present invention. In the second embodiment, components having the same functions as the components of the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted.

  In the pierce nut driving upper die 1B according to the second embodiment, a hole 21 as a pierce nut housing portion is formed on the same circle around the punch 11 provided at the center of the punch body 5. It is provided at equal intervals. The nut conveying plate 27A provided with the nut receiving holes 35 for receiving the pierce nuts 25 from the respective holes 21 at equal intervals on the same circle is connected to the planetary gear meshed with the internal gear 71 provided on the lower surface cover 29. It is configured.

  The diameter of the circle in which each nut receiving hole 35 provided in the planetary gear (nut transport plate) 27A is arranged is equal to the radius of the circle in which the hole 21 is arranged. When the planetary gear 27A meshes with the internal gear 71 and intermittently rolls, one nut receiving hole 35 of the plurality of nut receiving holes 35 provided in the planetary gear 27A is formed in the punch body 5. The vertical position coincides with one of the plurality of holes 21 provided in the. The other nut receiving hole 35 is positioned below the punch tip 49 provided in the punch 11.

  That is, in the state shown in FIG. 9, the nut receiving hole 35A provided in the planetary gear 27A and the hole 21A provided in the punch body 5 are vertically aligned, and the hole 21B provided in the planetary gear 27A, the punch 11, and the punch The chip 49 is in a state of being aligned vertically. In order to prevent the pierce nut 25 housed in the hole 21 other than the hole 21 </ b> A from dropping, a nut support portion plate 73 is rotatably provided inside the internal gear 71.

  The nut support plate 73 is a disk-like plate having the same thickness as the planetary gear 27A, and the nut support plate 73 has a circular cutout portion in which the planetary gear 27A is rotatably fitted. 75 is formed. In other words, the planetary gear 27 </ b> A is relatively rotatably provided in the notch 75 in the nut support plate 73.

  An intermittent rotation mechanism 61A (see FIG. 8) for intermittently rotating the planetary gear 27A and the nut support plate 73 is provided. More specifically, a hollow rotary shaft 77 surrounding the punch 11 is provided at the center of the punch body 5, and a pinion 65 is integrally provided at the upper end of the hollow rotary shaft 77. A rotation transmitting member 67 is provided to be rotatable in one direction. A one-way clutch 69 is provided between the rotation transmission member 67 and the hollow rotary shaft 77.

  In order to intermittently rotate the hollow rotary shaft 77 in one direction via the one-way clutch 69, an actuator provided with a rack 63 meshed with the pinion 65 on the punch body 5 so as to be reciprocally movable. 57 is provided. As in the first embodiment, the actuator 57 operates by receiving a working fluid supplied from a fluid ejection port 53 provided in the striker 51. Therefore, in the pierce nut driving upper mold 1B according to the second embodiment, the hollow rotary shaft 77 can be intermittently rotated in one direction by the operation of the actuator 57 as in the above embodiment. It is.

  In order to transmit the rotation of the hollow rotary shaft 77 to the planetary gear 27 </ b> A and the nut support member 73, a large diameter portion 77 </ b> L is formed at the lower end portion of the hollow rotary shaft 77. The lower surface of the large-diameter portion 77L is provided with a shaft 81A that is rotatably fitted in an engagement hole 79A formed at the center of the planetary gear 27A. In addition, a shaft 81B is provided at a symmetrical position about the axis of the hollow rotary shaft 77 on the lower surface of the large diameter portion 77L. The shaft 81B is relatively rotatably fitted in an engagement hole 79B formed in the nut support plate 73.

  Therefore, when compressed air is supplied to the actuator 57 to cause a piston rod (not shown in FIG. 8) to project, the pinion 65 is rotated by the rack 63. The rotation of the rack 63 at this time is idling without transmitting the rotation to the hollow rotary shaft 77. When supplying compressed air to the actuator 57, the punch head 13 is struck by the striker 51 provided in the punch press, as in the first embodiment, and the workpiece W on the die D in the punch press is applied. This is a case where the operation of driving the pierce nut 25 is performed. FIG. 8 shows a state immediately before the pierce nut 25 is driven into the workpiece W.

  After the pierce nut 25 is driven into the workpiece W, when the striker 51 is raised and returned, the punch head 13 is raised by the elastic member 15. When the punch tip 49 provided in the punch 11 is detached upward from the nut receiving hole 35 of the planetary gear 27A, the rack 63 is returned to the original position by the action of the return spring built in the actuator 57. Therefore, the pinion 65 is rotated in one direction, and the rotation of the pinion 65 in one direction is transmitted to the hollow rotating shaft 77 via the one-way clutch 69.

  As described above, when rotation in one direction is transmitted to the hollow rotation shaft 77, the planetary gear 27A and the nut support plate 73 are rotated in one direction via the shafts 81A and 81B, respectively. Here, assuming that the hollow rotary shaft 77 rotates in the counterclockwise direction in FIG. 9, the nut support plate 73 is rotated counterclockwise around the punch tip 49 in FIG. 9 by the action of the shaft 81B. To be rotated.

  The planetary gear 27 </ b> A revolves counterclockwise in a state where the planetary gear 27 </ b> A is located in the notch 75 in the nut support plate 73. Further, the planetary gear 27A rotates around the shaft 81A while revolving as described above due to the meshing relationship with the internal gear 71. Accordingly, when the nut receiving hole 35 at the position corresponding to the punch tip 49 is moved by the pitch of the nut receiving hole 35 due to the revolution and rotation of the planetary gear 27A, the next position of the adjacent position where the pierce nut 25 is received. The nut receiving hole 35 is positioned at a position corresponding to the punch tip 49, and the pierce nut 25 in the next nut receiving hole 35 is driven into the workpiece W.

  As described above, when the planetary gear 27A revolves and rotates, the nut receiving hole 35A that receives the pierce nut 25 in alignment with the hole 21A rotates (rotates) around the shaft 81A, and It is gradually moved to a lower position corresponding to the punch tip 49. Then, when the planetary gear 27A revolves and rotates to move, the adjacent nut receiving hole that has been emptied by driving the pierce nut 25 into the workpiece W at a position corresponding to the punch tip 49. 35 coincides with the hole 21 adjacent to the hole 21A. Accordingly, the pierce nut 25 is supplied by dropping from the hole 21 into the empty nut receiving hole 35.

  As understood from the above description, according to the second embodiment, the planetary gear 27A sequentially receives the supply of the pierce nut 25 from the holes 21 provided at a constant pitch, and the pierce nut 25 is transferred to the punch tip 49. Positioning to the corresponding lower position. Accordingly, the pierce nut 25 in each hole 21 is reduced uniformly.

  Also in the second embodiment, since the hollow rotating shaft 77 and the planetary gear 27A are intermittently rotated in association with the reciprocating motion of the actuator 57 provided on the upper portion of the punch body 5, the vertical stroke of the striker 51 is also increased. Even when the length is small, it can be easily applied.

  FIG. 10 is a cross-sectional view showing the configuration of a piercing nut driving upper mold 1C according to the third embodiment. In this 3rd Embodiment, the overlapping description is abbreviate | omitted as attaching | subjecting the same code | symbol to the component which show | plays the same function as the upper metal mold | die in each above-mentioned embodiment.

  The upper mold 1C according to this embodiment is supported by a rotary sleeve 83 that is rotatably supported by a punch holder 3 in a punch press so as to be movable up and down. That is, the rotating sleeve 83 is rotatably supported by the punch holder 3 via a plurality of bearings 85. A worm wheel 87 is provided on the upper portion of the rotating sleeve 83, and a worm gear (not shown) that is controlled and rotated by a servo motor is engaged with the worm wheel 87. Note that it is already well known that the punch holder 3 is provided with a rotatable sleeve 83 (see, for example, JP-A Nos. 11-285746 and 2007-75889). Detailed description of the configuration for doing so will be omitted.

  The upper mold 1C is provided with a punch body 89 fitted in the rotary sleeve 83 so as to be movable up and down. A key 91 provided on the rotary sleeve 83 is provided in a vertical key groove 89K formed in the punch body 89. Are engaged so as to be relatively movable up and down. Therefore, the punch body 89 is fitted so as to be movable up and down so as to rotate integrally with the rotary sleeve 83.

  In order to move the punch body 89 up and down, a cylindrical punch lifter 95 is supported on the upper surface of the punch holder 3 via a lifter spring 93 so as to be movable up and down. The lifter spring 93 always moves upward. Energized and supported. In the punch lifter 95, a body holder 99 provided rotatably relative to the upper portion of the punch body 89 is supported via a bearing 97. In other words, the punch body 89 is rotatably provided on the lower side of the body holder 99.

  The body holder 99 is integrally fixed in the punch lifter 95 via an appropriate fixing tool 101 including a bolt 101A and a key 101B. A hollow shaft 103 is integrally fixed to the center portion of the body holder 99 via a key 105. The hollow shaft 103 penetrates the central part of the punch body 89 in the vertical direction, and the punch 11 having a punch tip 49 at the lower end penetrates the hollow shaft 103 so as to be movable up and down. .

  A punch head 13 that is struck by a striker 51 in a punch press is provided at the upper end of the punch 11. The punch head 13 is always urged upward by a plurality of return springs 106 elastically mounted between the punch head 13 and the body holder 99. The raised position of the punch head 13 is regulated by a stopper member 107 such as a bolt. Therefore, the punch 11 is lowered by being struck by the striker 51 and is returned to the original raised position by the return spring 106.

  In the punch body 89, a plurality of holes (pierce nut accommodating portions) 21 for accommodating the pierce nuts 25 in an overlapped state are the same circle (a circle centered on the axis of the punch body 89), as in the above-described embodiment. ) At the same pitch. A lower surface cover 109 is provided below the punch body 89. The lower surface cover 109 is fitted to the outer peripheral surface of the lower end of the punch body 89, and via an engaging piece 111 such as a pin engaged with a circumferential groove 89G formed on the outer peripheral surface of the lower end of the punch body 89. It is detachable.

  A bush 47 is provided at the center of the lower surface cover 109 as in the above embodiment, and a nut holding member 45 is provided on the upper surface of the bush 47. A ring-shaped internal gear 113 is integrally attached to the inside of the lower surface cover 109 and between the lower end surface of the punch body 89 via a pin 115 (see FIG. 12). In this internal gear 113, a nut support plate 117 (see FIG. 13) having the same shape as the nut support plate 73 is relatively rotatably arranged.

  A planetary gear 119 as a nut conveying plate is rotatably arranged in a circular notch 117C formed at an eccentric position of the nut support member 117. A sliding plate such as a fluororesin plate having a small friction coefficient is provided between the lower surface cover 109 and the nut support member 117 and the planetary gear 119 so that the nut support plate 117 and the planetary gear 119 rotate smoothly. 121 is interposed.

  The planetary gear 119 meshes with the internal gear 113 so as to be relatively rotatable. Similar to the planetary gear 27A, the planetary gear 119 receives the supply of the pierce nut 25 from each hole 21 provided in the punch body 89 and carries it to the position below the punch tip 49. Nut receiving holes 35 are provided at equal pitches. An engagement hole 123 is formed at the center of the planetary gear 119, and a shaft 125 (see FIG. 10) provided on the lower surface of the hollow shaft 103 is relatively rotatably fitted in the engagement hole 123. It is.

  FIG. 14 shows a planar positional relationship among the punch 11, the hole 21 provided in the punch body 89, the nut support plate 117, the nut receiving hole 35 provided in the planetary gear 119, the shaft 125, and the like. As shown in As understood from FIG. 14, when the punch body 89 is rotated by the rotation of the rotary sleeve 83, a virtual circle 127 </ b> A in which a plurality of holes 21 provided in the punch body 89 are arranged at an equal pitch, and the planetary gear 119. An imaginary circle 127B in which a plurality of nut receiving holes 35 are arranged comes into contact at one place.

  Accordingly, the punch body 89 is rotated by a predetermined angle, and the planetary gear 119 is rotated (revolved) relative to the internal gear 113 in response to the rotation of the punch body 89 (the planetary gear 119 is pivoted). The hole 21 provided in the punch body 89 and the nut receiving hole 35 coincide with each other in the vertical direction, and the pierce nut 25 is supplied from the hole 21 to the nut receiving hole 35. is there. When the nut receiving hole 35 that has received the pierce nut 25 is positioned below the punch tip 49, the punch head 13 is struck by the striker 51, and the pierce nut 25 positioned below the punch tip 49. Is driven into the workpiece W.

  As understood from the above description, according to the present embodiment, the rotation of the rotating sleeve 83 is controlled by a servo motor. Accordingly, the desired hole 21 provided in the punch body 89 and the desired nut receiving hole 35 provided in the planetary gear 119 are positioned so as to coincide with each other vertically, and the nut receiving hole 35 receiving the pierce nut 25 is punched. Positioning under the chip 49 can be easily performed.

  According to the above embodiment, in the punch press, the upper mold 1C is mounted in the rotary sleeve 83 that is rotationally positioned by a servo motor so as to be movable up and down. A configuration and an actuator for rotating the mold 1C are unnecessary, and the configuration of the upper mold 1C can be simplified.

  As can be understood from the above description of the embodiment, the pierce nut driving upper die according to the embodiment of the present invention can be easily applied to a punch press having a short vertical stroke of the striker 51. In addition, the upper and lower dimensions of the upper mold can be reduced.

  The present invention is not limited to the embodiment as described above, and can be implemented in other forms by making appropriate modifications. That is, the actuator 57 can be a small motor.

1,1B, 1C Pierce nut driving upper die 3 Punch holder (upper turret)
5 Punch Body 11 Punch 13 Punch Head 19 Rotating Shaft 21 Hole (Pierce Nut Housing)
25 Pierced nuts (caulking nuts)
27 Nut conveying plate 27A Nut conveying plate (planetary gear)
29 Lower surface cover 33 Nut support plate 35 Nut receiving hole 37 Engagement hole 39 Engagement pin 41 Rotation transmission member 43 Through hole 45 Nut holding member 49 Punch tip 51 Striker 57 Actuator 61 Intermittent rotation mechanism 63 Rack 65 Pinion 67 Rotation transmission member 69 One-way clutch 71 Internal gear 73 Nut support plate 77 Hollow rotary shaft 83 Rotary sleeve 89 Punch body 99 Body holder 103 Hollow shaft 109 Lower surface cover 113 Internal gear 117 Nut support plate 119 Planetary gear (nut transport plate)

Claims (5)

  A pierce nut driving upper die supported by a punch holder in a punch press so as to be movable up and down, the pierce nut being supplied to the lower side of the punch body supported by the punch body supported by the punch holder. The punch body is provided with a punch that can be moved up and down, and a nut conveyance plate that conveys a pierce nut in a pierce nut housing portion provided in the punch body to a position below the punch, and is rotatably provided in the punch body. A pierce nut comprising an intermittent rotation mechanism for intermittently rotating the nut conveying plate in one direction, and an actuator for driving the intermittent rotation mechanism included in the punch body Implanting upper mold.   The pierce nut driving upper die according to claim 1, wherein a rotation shaft for rotating the nut conveying plate is rotatably provided in the punch body, and the rotation transmission member rotatably provided on the rotation shaft and the rotation. A pierce nut driving upper die comprising a one-way clutch between the shaft and a fluid pressure cylinder as an actuator for rotating the rotation transmitting member in the punch body.   The pierce nut driving upper die according to claim 1 or 2, wherein the rotation shaft for rotating the nut conveying plate is provided at an eccentric position of the punch body, A pierce nut driving upper die characterized by being provided on a circle centering on a rotation axis.   A pierce nut driving upper die supported by a punch holder in a punch press so as to be movable up and down, and a rotatable sleeve rotatably supported by the punch holder and integrally rotatable with the rotatable sleeve The punch body is provided with a punch body supported so as to be movable up and down, and a punch for driving a pierce nut supplied to the lower side of the punch body into the workpiece is provided in the punch body so as to be movable up and down. A nut transport plate for transporting a pierce nut in the pierce nut housing provided to the lower position of the punch is rotatably provided on the lower side of the punch body, and the transport plate is intermittently rotated in one direction. A pierce nut driving upper die characterized by having an intermittent rotation mechanism. The pierce nut driving upper die according to claim 4, wherein the nut conveying plate is constituted by a rotatable planetary gear provided with a nut receiving hole for receiving a pierce nut supplied from the pierce nut housing portion. The planetary gear is a pierce nut driving upper die which is reciprocally meshed with an internal gear provided at a lower portion of the punch body.

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