JPH0541629U - Check device - Google Patents

Abstract

(57) [Summary] [Purpose] A mechanical high-speed and reliable change can be performed without using signals such as servo motor control and limit switches, sequences, etc., and reliable in one direction and one operation. Provided is a chuck device capable of self-holding. A piston of a mini-cylinder that opens and closes the chuck claws 209 by appropriately opening and closing a chuck claw 209 as a clamp finger on a piston rod 193 reciprocally provided in a fluid pressure cylinder 189 or a cylinder body. 201 is provided on the piston rod 193 or the cylinder body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is, for example, to hold or release the die holder when exchanging a die as a tool by a die exchanging device between a turret punch press and a tool magazine provided in the vicinity of the turret punch press. It is related to the chucking device.

[0002]

[Prior Art]

 Conventionally known turret punch presses include a rotatable upper turret that supports the punch in a detachable and replaceable manner, and a rotatable lower turret that detachably supports a die that processes the plate material in cooperation with the punch. And a striker that presses the punch indexed to the processing position, and a striker that can move up and down, and a plate material that can be moved and positioned in the X and Y axes by supporting a plate material processed by the punch and die on a work table. It has and. Then, punching of various shapes and sizes was performed on the plate material by selecting a required punch and die from a plurality of punches and dies mounted on the upper and lower turrets.

However, the number of punches and dies mounted on the upper and lower turrets is limited by the size of the upper and lower turrets. Therefore, a turret punch press equipped with a tool magazine and a die changing device adjacent to the turret punch press and having a so-called die changing device (ATC) is already well known. Various mechanisms such as a rotary tool magazine, a rotary back-and-forth moving system, and a cylindrical coordinate robot system have been known as the ATC mechanism.

A chuck device that forms a part of this ATC is a turret of a turret punch press or a tool magazine, in which a mold holder equipped with a mold as a tool is held or released to be replaced. There is.

[0005]

[Problems to be solved by the device]

 By the way, as a conventional chuck device, a sequence control device based on signals such as servo motor control and limit switch is used, which is performed by a complicated mechanism and control. In addition, the changing operation of the mold holder was slow and there was a problem in terms of reliability.

In order to solve the above problems, an object of the present invention is to enable mechanical high-speed and reliable change without using servo motor control, limit switch signal and sequence. The purpose of the present invention is to provide a checking device that can be surely held by one direction and one movement.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a mini-cylinder that opens and closes the clamp fingers by providing an appropriate number of clamp fingers on a piston rod or a cylinder body that is reciprocally provided in a fluid pressure cylinder. Is provided on the piston rod or the cylinder body to form a chuck device.

[0008]

[Action]

 By adopting the chuck device of the present invention, when the fluid pressure cylinder is operated, the piston rod or the cylinder body is reciprocated. By operating the mini-cylinder in the vicinity of the stroke end of the piston rod or the cylinder body, the clamp fingers are opened and closed, and the mold holder mounted with the mold is held or released. Therefore, the operation of gripping or releasing the die holder is performed at high speed and reliably.

[0009]

【Example】

 An embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIGS. 10, 11 and 12, the turret punch press 1 is provided with a common base 3, and a gate-shaped main body frame 5 is erected on the common base 3. The body frame 5 is composed of an upper frame 5U having an opening 7 and a lower frame 5D. A disk support 9 that receives the force of the press is provided at the processing position on the lower frame 5D.

The upper frame 5U of the main body frame 5 is provided with a hydraulic cylinder for moving the ram 11 up and down, or a drive device 13 including crank drive or servo drive. A striker 15 is provided below the ram 11. Moreover, the ram 11 is guided by the ram guide member 17 attached to the upper frame 5U and slidably slid in the Z-axis direction (vertical direction in FIGS. 10 and 11).

With the above configuration, when the drive device 13 is driven, the ram 11 is guided by the ram guide member 17 and moves in the Z-axis direction, so that the striker 15 moves up and down.

A plurality of brackets 19 extending in the Z-axis direction are attached to the lower frame 5D of the main body frame 5 at appropriate intervals in the Y-axis direction (left and right directions in FIGS. 11 and 12). A support frame 21 is provided on the plurality of brackets 19. A side table 25S of a work table 25 is provided on each of the support frames 21 via a plurality of balls 23 so as to be movable in the Y-axis direction. The work table 25 has side tables 25S on both sides of a fixed center table 25C.

On the left side of the work table 25 in FIG. 12, a carriage base 29 of the plate material movement positioning device 27 is provided. The carriage base 29 is supported by a rotatable ball screw 31 extending in the X-axis direction (horizontal direction in FIG. 10, vertical direction in FIG. 12). The ball screw 31 is provided with a carriage 33 that is movable in the X-axis sail direction via a nut member. Moreover, the carriage 33 is provided with a plurality of work clamps 35 for clamping the plate material W.

An X-axis motor 37 is provided below the carriage base 29 as shown in FIG. 12, and a drive pulley 39 is attached to the output shaft of the X-axis motor 37. On the other hand, a driven pulley 41 is attached to one end of the ball screw 31, and a timing belt 43 is wound around the driven pulley 41 and the drive pulley 39.

With the above configuration, when the Y-axis drive motor (not shown) is driven, the side table 25S is moved in the Y-axis direction via the carriage 23 and the ball 23 supported by the support frame 21. It will be. When the X-axis drive motor 37 is driven, the ball screw 31 is rotated via the drive pulley 39, the timing belt 43, and the driven pulley 41, so that the carriage 33 moves in the X-axis direction via the nut member. Will be done. Therefore, the plate material W clamped by the work clamp 35 is moved in the X and Y axis directions, and the desired position of the plate material W is positioned at the processing position below the striker 15.

A sub-frame 45 adjacent to the body frame 5 is erected on the common base 3. The sub-frame 45 has a C-shaped structure including an upper frame 45U and a lower frame 45D. An upper turret 49 of, for example, a rectangular parallelepiped is rotatably mounted on the lower portion of the upper frame 45U via an upper rotating shaft 47U, and is rotatable on the upper portion of the lower frame 45D via a lower rotating shaft 47D. Each of the rectangular lower turrets 51 is supported.

Punch holders PH equipped with punches P are detachably attached to both sides of the upper turret 49, and dies D are attached to both sides of the lower turret 51 at positions corresponding to the punches P. The die holder DH is detachably attached. Moreover, inside the upper and lower frames 45U and 45D, for example, fluid cylinders 53U and 53D; 55U as rotary driving means for rotating the upper and lower rotating shafts 47U and 47D in FIG. 55D is provided, and racks 61U, 61D; 63U, 63D are integrally provided at the tips of the piston rods 57U, 57D; 59U, 59D attached to the fluid cylinders 53U, 53D; 55U, 55D. ing. Pinions 65 and 67 fitted to the upper and lower rotating shafts 47U and 47D are meshed with the racks 61U and 61D; 63U and 63D.

With the above configuration, when the fluid cylinders 53U, 53D; 55U, 55D are operated, the piston rods 57U, 57D; 59U, 59D are moved in the left and right directions in FIG. 13, so that the racks 61U, 61D; 63U. , 63D and pinions 65, 67, the upper and lower rotary shafts 47U, 47D are synchronously rotated in the same direction. Therefore, the structure is simple, and the upper and lower turrets 49, 51 can be rotated at high speed and can be manufactured at low cost. As the rotation driving means, the upper and lower rotary shafts 47U and 47D may be rotated by a drive motor, a worm, and a worm wheel.

As shown in FIG. 14, a semi-arcuate auxiliary table 71 having a supporting member 69 such as a brush for supporting the plate W is provided on the side of the lower turret 51. .. Therefore, it is possible to perform the downward forming process and reduce the scratches generated on the plate material W when the lower turret 51 rotates.

With the above structure, the upper and lower rotary shafts 47U and 47D are rotated to index the selected upper and lower turrets 49 and 51 and position the selected punch P and die D at the processing position. Then, as the striker 15 moves up and down, the punch P and the die D cooperate with each other to punch the plate W at a desired position.

As described above, the punching process is performed by the operation of the vertically movable ram 11, but the heat generated by the operation at this time is filled in the upper frame 5U, and the upper frame 45U of the sub-frame 45. It is released without heat transfer to the part of. That is, since the thermal displacements generated in the upper and lower turrets 49 and 51 are supported by the upper and lower frames 45U and 45D of the sub-frame 45, only the heat of rotation of the upper and lower turrets 49 and 51 is The heat generated by the ram 11 does not cause a large thermal influence such as misalignment.

The upper and lower frames 45U, 45D of the sub-frame 45 are adjacent to each other on the left side in FIG. A die holder magazine 75 supporting a die D to be attached / detached to / from the turret 51 is provided. As shown in FIG. 10, the punch attaching / detaching / changing position PT of the upper turret 49 is located below the punch holder magazine 73, and the die attaching / detaching / changing position DT of the lower turret 51 is also shown in FIG. As described above, the upper and lower die exchanging devices 77U and 77D are arranged above and below the die holder magazine 75 in the vertical direction of the punch and die exchanging positions PT and DT. There is.

The punch and die holder magazines 73 and 75 are arranged so as to face each other in the vertical direction, and as shown in FIG. 12, endless chain members 79 and 81 are driven by a drive sprocket 83 and a driven member. It is wound around the sprocket 85. Drive motors 87, 89 such as servo motors are interlocked with the drive sprocket 83. Plural endless clamp claws 91, 93 for clamping punches, die holders PH, DH are attached to the chain members 79, 81 so as to face each other.

Chuck pawls 95 and 97 for clamping the punches and die holders PH and DH are provided below the upper and lower mold exchanging devices 77U and 77D. Further, drive motors 99 and 101 for a changer such as servomotors mounted on the upper and lower frames 45U and 45D of the subframe 45 move the upper and lower mold exchanging devices 77U and 77D up and down. Is becoming

With the above configuration, while the punch P and the die D cooperate with each other at the processing position to perform the punching process on the plate material W, the upper and lower die exchanging devices at the punch / die attaching / detaching exchanging positions PT and DT. 77U and 77D are moved up and down by the drive motors 99 and 101, and the punches and die holders PH and DH mounted on the upper and lower turrets 49 and 51 are extracted by the chuck claws 95 and 97, and the punch and die holder magazines 73 and 75 are removed. Attach to. Next, the punches and die holders PH and DH are extracted from the clamp claws 91 and 93 of the punch and die holder magazines 73 and 75 by the chuck claws 95 and 97, and mounted on the upper and lower turrets 49 and 51. By performing this series of operations, the upper and lower die exchanging devices 77U and 77D are linearly moved in the vertical direction between the punch and die attaching / detaching exchange positions PT and DT and the punch and die holder magazines 73 and 75. Since the punches, die holders PH, DH can be directly exchanged, the setup and exchange time can be shortened as compared with the conventional case. Therefore, it is possible to handle high-mix low-volume production and flexible automation, and even unmanned operation.

At the exchange positions of the punch and die holder magazines 73 and 75, as shown in FIGS. 11 and 121, a conventional mold exchanging device 103 composed of two known arms and a tooling are used. The tower 105 is arranged. This mold exchanging device 103 has clamp arms 109 attached to the tips of two arms 107 and can rotate 90 and 180 degrees. Since the structure is already known, detailed description is omitted. To do. The tooling tower 105 is also provided with a plurality of clamp claws 113 on the outer circumference of the cylindrical member 111, and the clamps 113 clamp the punches and die holders PH and DH. The cylindrical member 111 is rotatable and vertically movable. That is, the cylindrical member 111 is moved up and down by the operation of the fluid cylinder 115, and is also rotated by the drive of the servo motor 117 via the drive pulley 119, the timing belt 121, and the driven pulley 123. Therefore, the punch and die holders PH and DH are exchanged by the die exchanging device 103 between the punch and die holder magazines 73 and 75 and the tooling tower 105.

A specific configuration of the upper die exchanging device 77U in the die exchanging device 77 will be described. The lower die exchanging device 77D has substantially the same configuration, and the movement is only the reverse of the ascending and descending movements. Is omitted.

Referring to FIGS. 2, 3 and 4, the drive motor 99 is attached to the upper frame 45U of the sub-frame 45, and the drive pulley 125 is attached to the output shaft of the drive motor 99. Has been done. A support block 127 is attached to the upper frame 45U, and a rotary shaft 129 extending in the Z-axis direction (up and down direction) is attached to the support block 127. A driven pulley 131 is attached to the upper end of the rotary shaft 129. A timing belt 133 is wound around the driven pulley 131 and the drive pulley 125.

With the above configuration, when the drive motor 99 is driven, the drive pool 125 is rotated via the output shaft. The rotation of the drive pulley 125 causes the rotation shaft 129 to rotate via the timing belt 133 and the driven pulley 131.

A spindle 135 extending in the Z-axis direction is fitted to the rotating shaft 129, and a spiral groove cam 137 having a constant pitch is formed on the outer peripheral surface of the spindle 135. Horizontal grooves 139 and 141 connected to the upper and lower portions of the cam 137 are formed in the spindle 135. A hollow cylindrical member 143 is fitted in the lower part of the spindle 135, and a cam follower 145 is provided in the hollow cylindrical member 143.

Support plates 147R and 147L extending in the vertical direction are provided on both sides of the support block 127 so as to hang down. A guide member composed of a plurality of rotatable rollers is provided above and below the support plates 147R and 147L. 149 is supported. A clamp body 151 is provided so as to be guided by the guide member 149 and movable in the Z-axis direction.

The clamp body 151 is provided with a support block 153, and the support block 153 is provided with a cam follower 155 that engages with the cam 137 and can roll along the cam surface of the cam 137. There is.

Grooves 157 and 159 are formed on the upper and lower portions of the clamp body 151, and the engagement blocks having the cams 161 and 163 that can engage with the cam followers 145 are formed in the grooves 157 and 159, respectively. 165 and 167 are engaged. The cams 161 and 163 have, for example, the shapes shown in FIGS.

The engagement blocks 165 and 167 are provided on a pull rod 169 as a pulling member extending in the Z-axis direction, and grooves 171 are provided at appropriate intervals under the pull rod 169. The clamp body 151 is provided with a plunger 173 which engages with the groove 171 and positions the clamp body 151.

A support frame 175 is provided at a lower end of the clamp body 151, and a slide member 177 integrated with the pull rod 169 is provided at a lower portion of the support frame 175 so as to be movable in the Z-axis direction. One end of a plurality of links 179 is fixed to the slide member 177 by a pin 181. The other end of the link 179 is fixed to one end of the collet 185 by a pin 183. The other end of each collet 185 is rotatably supported by the support frame 175 by a pin 187. However, the base of the chuck claw 95 is attached to each collet 185.

With the above configuration, when the rotating shaft 129 is rotated, the spindle 135 is rotated in the same direction. The cam follower 155 engaged with the cam 137 formed on the spindle 135 rolls along the cam 137 by the rotation of the spindle 135, whereby the clamp body 151 is vertically moved.

When the cam follower 155 enters the horizontal grooves 139 and 141 connected to the upper and lower parts of the cam 137, the clamp body 151 is stopped at the upper end or the lower end. When the clamp body 151 is stopped at the upper end or the lower end, the second cam follower 145 fits into the cam 163 or 161.

For example, when the second cam follower 145 is fitted into the cam 163 with the clamp body 151 at the upper end, it moves upward along the cam surface in the direction of the arrow as shown in FIG. Stop at the position indicated by the dashed line. That is, when the pull rod 169 is lifted up in this state, the link 179 pivots upward in FIG. 3 with the pin 183 as a fulcrum, and the collet 185 pivots outward with the pin 187 as a fulcrum. By doing so, the chuck claw 95 is unclamped from the punch holder PH. Then, when the spindle 135 is reversed and the clamp body 151 is lowered from the upper end, the cam follower 145 returns to the position indicated by the solid line in FIG. 5B, and the pull rod 169 does not move. Therefore, the chuck claw 95 remains in the unclamped state. Be lowered.

In FIG. 5B, when the cam follower 145 is at the position indicated by the chain double-dashed line, and the spin follower 135 is slightly rotated in the same direction, the cam follower 145 moves to the position indicated by the dotted line along the surface of the cam 163. The pull rod 169 moves downward. That is, when the pull rod 169 moves downward, the link 179 pivots downward with the pin 183 as a fulcrum, and the collet 185 pivots inward with the pin 187 as a fulcrum, so that the chuck claw 95 punches. The holder PH will be clamped. When the clamp main body 151 is lowered in this state, it is lowered while the punch holder PH is clamped by the chuck claws 95.

Similarly, when the second cam follower 145 fits into the cam 161 even at the lower end of the clamp body 151, as shown in FIG. 5A, it moves downward along the surface of the cam 161 in the arrow direction. Move and stop at the position indicated by the chain double-dashed line. That is, when the pull rod 169 descends downward in this state, the punch holder P H is clamped by the chuck claws 95 as described above. Further, when the cam follower 145 is at the position indicated by the chain double-dashed line in FIG. 5A and the spindle 135 is slightly rotated in the same direction, the cam follower 145 moves to the position indicated by the dotted line along the surface of the cam 161. The pull rod 169 moves upward. That is, when the pull rod 169 moves upward, the chuck claw 95 is unclamped from the punch holder PH as described above.

As described above, the chuck claw 95 can be self-held by the link mechanism, but may be self-held by spring.

An operation of exchanging the punch holder PH between the upper turret 49 and the punch holder magazine 73 by the upper die exchanging device 47U will be described. First, it is assumed that the punch holder PH is attached to the punch exchange position PT of the upper turret 49 and the chuck claw 95 is in the unclamped state (released state). When the drive motor 99 is driven and the spindle 135 is rotated in this state, the clamp body 151 descends, the second cam 161 engages with the cam follower 145, and further moves along the surface of the cam 161 to move it to the position shown in FIG. When the position of the two-dot chain line shown in () is reached, the pull rod 169 descends to clamp the punch holder PH with the chuck claw 95.

When the spindle 135 is reversely rotated in this state, the clamp body 151 rises, the second cam 163 engages with the cam follower 145, and further moves along the surface of the cam 163, as shown in FIG. 5 (B). When the position of the two-dot chain line is reached, the pull rod 169 rises and the chuck claws 95 are unclamped, and the punch holder PH is attached to the punch holder magazine 73.

Next, the punch holder magazine 73 is rotated to position the new next punch holder PH at the replacement position. In this state, when the spindle 135 is moved in the same direction and the cam follower 145 reaches the position shown by the dotted line in FIG. 5B, the pull rod 169 descends and the chuck claw 95 closes to clamp the punch holder PH.

In this state, the clamp main body 151 is lowered so that the second cam follower 145 engages with the cam 161. In this state, the punch holder PH clamped by the chuck claws 95 is mounted on the upper turret 49.

With the punch holder PH attached to the upper turret 49, when the second cam follower 145 comes to the position indicated by the chain double-dashed line in FIG. 5 (A), the pull rod 169 moves down and the chuck claw 95 moves. By unclamping from the punch holder PH and rotating the spindle 135 in the reverse direction, the clamp main body 151 is lifted with the chuck claws 95 open, and a series of die replacement is performed.

Therefore, by using this mold exchanging device 47, signals such as servo motor control and limit switches, sequences, etc. are not required, and high-speed and reliable changing, that is, mold exchanging can be performed. Moreover, the action of the force of the chuck claw 95 can be surely held in one direction and one operation. In the above embodiment, the cam follower 145 may be provided on the pull rod 169 side and the second cams 161 and 163 may be provided on the cam 135 side.

FIG. 1 shows a specific configuration of the upper mold exchanging device 47U in the mold exchanging device 47 according to another embodiment. The structure of the lower mold exchanging device 47D is almost the same, and as the movement, the ascending / descending only replaces the descending / ascending, so the description thereof will be omitted.

In FIG. 1, the upper mold exchanging device 47U is provided with a fluid cylinder 189, and this fluid cylinder 189 is attached to an upper frame 45U of a sub-frame 45 (not shown). A piston 191 is provided in the fluid cylinder 189, and a piston rod 193 that extends in the vertical direction projects and is integrated with the lower portion of the piston 191. A support block 195 is provided at the lower end of the piston rod 193.

A hole 197 is formed through the piston 191 and the piston rod 193 in the vertical direction, and a pull rod 199 extending in the vertical direction is provided in the hole 197. A piston 201 is integrated in the middle of the pull rod 199, and a cam follower 203 is provided at the lower end of the pull rod 199.

One end of a link 207 is attached by a pin 205 to both ends of the support block 195, and the other end of the link 207 is engaged with the cam follower 203. Moreover, the upper end of the chuck claw (clamp finger) 209 is attached to one end of the link 207 by the pin 205.

With the above configuration, when hydraulic pressure is supplied to the upper cylinder chamber 211 formed with the piston 191 as a boundary, the piston rod 193 descends via the piston 191, whereby the chuck claw 209 descends. When hydraulic pressure is supplied to the lower cylinder chamber 213 formed at the boundary of the piston 191, the piston 191 moves up, and the chuck claw 209 moves up.

When hydraulic pressure is supplied to the upper cylinder chamber 215 formed with the piston 201 as a boundary, the piston 201 descends and the cam follower 203 descends via the pull rod 199, so that the link 207 moves the pin 205 to the pin 205. As a fulcrum, the chuck claws 209 are rotated outward by fulcrum, and the punch holder PH is unclamped.

When hydraulic pressure is supplied to the lower cylinder chamber 217 formed with the piston 201 as a boundary, the piston 201 moves up and the pull rod 199 also moves up. Therefore, as the cam follower 203 rises, the link 207 pivots inward with the pin 205 as a fulcrum, the chuck claws 209 are closed, and the punch holder PH is clamped.

As described above, when the chuck claw 209 is opened or closed at the punch replacement position of the upper turret 49 and the replacement position of the punch holder magazine 73, the punch holder PH is clamped or unclamped by the chuck claw 209. Will be exchanged. Therefore, the same effect as that of the above-described embodiment is obtained. In this embodiment, the fluid cylinder 189 is fixedly provided and the piston rod 193 is reciprocally moved. However, the piston rod 193 may be fixed and the fluid cylinder (cylinder body) 189 may be reciprocally moved. I don't know. The chuck claw 209 is self-held by the operation of the link 207, but it may be performed by spring.

As shown in FIG. 12, the punch and die holder magazines 73 and 75 are designed to be moved by a chain member 83 wound around a drive sprocket 83 and a driven sprocket 85. .. Since the specific configuration of the die holder magazine 75 is almost the same as the specific configuration of the punch holder magazine 73, the punch holder magazine 73 will be described and the description of the die holder magazine 75 will be omitted.

More specifically, as shown in FIGS. 6 and 7, guides extending in the Y-axis direction (the direction orthogonal to the paper surface in FIG. 6) are provided above and below the upper frame 45U of the sub-frame 45. Members 219U and 219D are provided, and upper and lower chain members 79U and 79D of the chain member 79 are guided by the guide members 219U and 219D to be driven and driven.

A block member 221 extending in the Y-axis direction is provided on the vertical frame of the upper frame 45U, and a plurality of rollers 223 are rotated and guided on the lower surface of the block member 221. ing. A first clamp member 225 is attached to each roller 223. A second clamp member 229 is provided above and below the first clamp member 225 via a pin 227 on the opposite side. The second clamp member 229 and the first clamp member 225 are formed by a plurality of bolts. It is fixed. Moreover, the first and second clamp members 225 and 229 are clamped to the upper and lower chain members 79U and 79D.

A pin 231 extending in the vertical direction in FIG. 6 is attached to the second clamp member 229. One end of a link 233 is fitted to this pin 231 and the other end of the link 233 is also attached. It is attached to the upper end of the pin 235. A base portion 237B of the clamp body 237 is fitted to the lower portion of the pin 235, and a clamp claw 91 is pivotably supported on the base portion 237B of the clamp body 237 so as to be openable and closable.

A block member 239 is provided on the side of the base 237B of the clamp body 237 at the same height as the clamp claw 91. A plurality of block members 239 formed on the inside of the tip of the block member 239 and the clamp claw 91 are provided. A plurality of springs 241 are interposed between the groove 91H and the groove 91H to constantly urge the clamp claw 91 inward.

A stopper member 245 is swingably supported by a pin 243 at a tip portion (upper right and lower end portions in FIG. 7) of the clamp body 237, and a block member 249 having a leaf spring 247 is provided. It is provided. A cam 245C is formed at the tip of the stopper member 245 as shown in FIG. That is, the cam 95C ₁ formed at the tip of the chuck claws 95 in the upper mold exchange equipment 77u, the cam 245C is guided by the stopper member 245 against the urging force of the plate spring 2 47 pin 243 as a fulcrum In FIG. 7, it is adapted to rotate outward.

A clamp cam 91C is formed on the inner surface of the rear side of the clamp claw 91. The clamp cam 91C is pushed by the cam 95C ₂ formed on the chuck claw 95 so that the clamp claw 91 opens with the pin 235 as a fulcrum against the biasing force of the spring 241.

With the above structure, the clamp main body 237 is positioned on the exchange device by the traveling drive of the chain members 79U and 79D, and the punch holder PH is shown in FIG. 7 by the clamp claws 91 provided on the clamp main body 237. It is in a clamped state. In this state, the chuck claws 95 provided on the upper mold exchanging device 77U are lowered from the upper side in FIG. 7 and enter the front and rear ends of the clamp main body 237 as shown in FIG. 9 (A). Then it is positioned.

[0065] In this state, as shown in FIG. 9 (A), strike Tsu path member 245 by the cam 95 C ₁ of the chuck claws 95 are lowered along the cam 245C ₁ of the stopper member 245 is a pin 243 As a fulcrum, it is rotated outward against the urging force of the leaf spring 247. Therefore, the stopper member 245 is in a state of being disengaged from the tip of the clamp claw 91.

In the state of FIG. 9A, the chuck claw 95 is closed. That is, the chuck claw 95 moves inward in the left-right direction. As shown in FIG. 9B, the cam 95C ₂ of the chuck claw 95 moves left and right along the cam 91C of the clamp claw 91, so that the clamp claw 91 resists the urging force of the spring 241 with the pin 235 as a fulcrum. Then it will be opened to the outside.

Thus, the punch holder PH is unclamped from the clamp claw 91 and clamped by the chuck claw 95. That is, the punch holder PH is directly transferred from the clamp claw 91 to the chuck claw 95 by a linear motion.

The punch holder PH clamped by the chuck claws 95 descends and is attached to the upper turret 49 at the punch attachment / detachment exchange position PT. After mounting the punch holder PH on the upper turret 49, the chuck claws 95 are raised in the empty state and returned to their original positions.

Further, when the chuck claw 95 descends in an empty state and the punch holder PH mounted on the upper turret 49 is clamped at the punch attachment / detachment exchange position and lifted up and stopped at the position of the clamp claw 91, The cam 95C ₂ of the chuck claw 95 pushes and widens the cam 91C of the clamp claw 91, and the cam 95C ₁ rotates the stopper member 245 via the cam 245C of the stopper member 245, resulting in the state shown in FIG. 9B. When the chuck claw 95 is opened in this state, the state shown in FIG. 9A is reached, and the clamp claw 91 is closed by the urging force of the spring 241 with the pin 235 as a fulcrum.

Therefore, the punch holder PH is passed from the chuck claw 95 to the clamp claw 91 and clamped by the clamp claw 91. When the chuck claw 95 is further raised to the original position, the stopper member 245 is rotated inward by the urging force of the plate spring 247 with the pin 243 as a fulcrum to fix the clamp claw 91.

As described above, the chuck claw 95 and the clamp claw 91 are positioned at right angles, and the punch holder PH is moved linearly from the chuck claw 95 to the clamp claw 91 or from the clamp claw 91 to the chuck. It can be delivered directly to the nail 95. Therefore, the chuck claws 95, 97 in the mold exchanging device 77 can pass through the punches and the die holder magazines 73, 75 and can be forcibly released, and moreover, the space saving advantageous for the design such as high speed changing can be secured. ..

It should be noted that the present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes.

[0073]

[Effect of the device]

 As can be understood from the above description of the embodiments, according to the present invention, since the configuration is as described in the scope of claims for utility model registration, signals and sequences of servo motor control, limit switch, etc. In addition to eliminating the need for a tool holder, the tool holder with the tool as a tool can be held or released in the turret or tool magazine at high speed and reliably. Further, the action of the force of the chuck claws can be obtained in one direction and one operation to obtain a reliable self-holding.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main part of the present invention and showing another embodiment of a chuck device in an upper mold exchanging device.

FIG. 2 is an enlarged view of a portion indicated by an arrow II in FIG.

3 is a view taken along the line III-III in FIG.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is an example diagram of a cam shape in an engagement block attached to a bull rod.

FIG. 6 is an example of a punch holder magazine and is an enlarged view taken along line VI-VI in FIG. 12.

7 is a view taken along line VII-VII in FIG.

FIG. 8 is a perspective view showing only one part of the clamp claw in FIG.

FIG. 9: Punch holder from check claw to clamp claw
Or, it is an operation explanatory view of transferring from the clamp claw to the check claw.

FIG. 10 is a right side view of a turret punch press including a mold exchanging device according to an embodiment of the present invention.

11 is a front view of FIG.

12 is a plan view of FIG.

FIG. 13 is an enlarged view taken along line XIII-XIII in FIG.

14 is an enlarged view of the XIV arrow section in FIG.

[Explanation of symbols]

 1 Turret Punch Press 5 Main Frame 5U, 5D Upper and Lower Frame 11 Ram 15 Striker 25 Work Table 27 Plate Moving Positioning Device 35 Work Clamp 45 Subframe 45U, 45D Upper, Lower Frame 49, 51 Upper, Lower Turret 71 Auxiliary Table 73 , 75 Punch, die holder magazine 77 Mold changing device 77U, 77D Upper and lower mold changing device 91, 93 Clamp claw 95, 97 Chuck claw (clamp finger) 189 Fluid cylinder 191 Piston 199 Pull rod 201 Piston 209 Chuck claw (clamp finger) )

Claims (1)

[Scope of utility model registration request] 1. A mini-cylinder for opening / closing the clamp finger is provided on the piston rod or the cylinder body, which is provided on the fluid pressure cylinder so as to reciprocate, and the clamp finger is opened / closed on the piston rod or the cylinder body. A chuck device characterized by being provided.