WO2010082372A1

WO2010082372A1 - Punching debris receiving device and stripping device

Info

Publication number: WO2010082372A1
Application number: PCT/JP2009/060668
Authority: WO
Inventors: 孝之竹内
Original assignee: 日本ダイスチール株式会社
Priority date: 2009-01-19
Filing date: 2009-06-11
Publication date: 2010-07-22
Also published as: JP5073837B2; JP5145475B2; WO2010082626A1; JPWO2010082626A1; JP2012183641A

Abstract

A highly reliable punching debris receiving device for a stripping device is adapted such that punching debris such as debris from punched holes can be accurately dropped into the punching debris receiving device. Receiving claw containing spaces (24) are each formed between opposed side plates (23) of a holder (21) mounted to a female (lower) die (11) of a stripping device so as to open between upper side sections and front edges of the side plates (23), and receiving claws (22) are mounted in the receiving claw containing spaces (24). Vertically sloped guide holes (31) are formed in the side plates (23) of each receiving claw containing space (24), and guide projections (32) provided on side surfaces of the receiving claw (22) are slidably inserted in the guide holes (31) so that the receiving claw (22) moves up and down in an oblique direction with the upper surface of the receiving claw (22) horizontally maintained. The receiving claws (22) are urged upward by elastic members (35). When a pushing and dropping member (17) of a male (upper) die (12) pushes down punching debris (c) of a punched hole which debris (c) is formed in a punching sheet (S), the punching debris (c), which is supported and held by the pushing and dropping member (17) and the receiving claws (22) whose upper surfaces are horizontally maintained, is pulled down so as to be separated from a product and the receiving claws (22) are lowered and moved to a position at which the debris (c) is released from the support. When the male die (12) rises after the debris (c), which is released by the receiving claws (22) from the support, is dropped and discharged, the receiving claws (22) are forcibly returned upward by the elastic members (35).

Description

Punching waste holder and stripping device

The present invention relates to a punching waste holder and a stripping device for a stripping device for separating and removing punching waste formed in and around the product portion of a punched sheet product.

In a die cutter that forms a sheet as a box forming material by punching a corrugated cardboard sheet or cardboard into a predetermined shape, the tip is sandwiched by a gripper of a sheet transfer device and is intermittently transferred in one direction with a constant stroke. A punching device, a stripping device, and a product separating device are provided in this order in the sheet transfer path, and a punching cutting line having the same shape as the product to be formed on the sheet is formed by the punching device.

</ RTI> By the punching, external scraps are formed around the product part, and in some cases, punch holes are formed in the product part. Moreover, when several product parts are taken with respect to a sheet | seat, a punch hole waste may be formed between adjacent product parts. External scraps and punched hole scraps, which are punching scraps, are connected to the product portion through a slight connection. Therefore, in the stripping device, punching scraps such as the above-mentioned external scraps and punched-out scraps are separated from the product part by knocking down, and in the product separating apparatus, the product part is removed from the gripping margin obtained by the gripper. To be separated.

In the above-described die cutter stripping device, a male die, which is the upper die having the same shape as the product part, is provided on the upper side, and a push-out member for dropping off external scraps and punching-out scraps from the punch holes are dropped on the lower surface of the male die. On the other hand, a female die, which is a lower die provided below the male die, is provided with a waste discharge hole as a drop discharge passage at a position facing the punch hole waste. When the mold is lowered, the scraping members are used to remove the external scraps and punching scraps that are punching scraps.

By the way, if punch holes are formed in the product section and the punch holes are relatively small, or if the width of the external scrap is relatively small, the punch hole scraps are completely removed from the product section only by pushing down the thrusting member. May not be separated.

Therefore, a punching waste holder is attached to the female mold, the punching waste holder supports a part of the periphery of the bottom surface of the punching waste, and the punching member and punching are punched when the punching scrap is pushed down by the dropping member for dropping the scrap. Punching waste is pinched with the scrap holder and pulled down, and the punching scraper is retracted to a position that does not prevent the punching scrap from dropping in the process of further lowering the dropping member, so that the punching scrap is pushed down and discharged. I have to.

Conventionally, the punching waste holder described in Patent Document 1 is known. FIGS. 16 and 17 show an example of punching of punched-out scraps as punched scraps formed in the product portion by the punched scrap receiver described in Patent Document 1. This punching waste holder is provided with a space portion 51 that opens at the front upper portion of a support frame 50 that is attached to the periphery of the waste discharge hole 41 formed in the lower mold 40, and the punching piece incorporated in the space portion 51. The scrap receiving piece 52 is swingably supported by a pivot shaft 53, and the scrap receiving piece 52 extends forward (in the direction of the scrap discharge hole) from the front opening of the space 51. In a horizontal state, a magnet 55 is fixed to a surface of the lower half 54 of the scrap receiving piece 52 extending downward from the swing center and facing the front wall of the space 51, while the space 51 is opposed to this. The steel plate 56 is fixed to the front wall.

In the punched scrap receiver, the punch 55 is held in a horizontal state in which the magnet 55 attracts the steel plate pieces 56 so as to protrude into the scrap discharge hole 41, and is processed by the scrap receiver pieces 52. The lower surface of the punched hole waste c formed on the sheet S is supported, and when the upper die 42 is lowered, the punched hole waste c is sandwiched by the thrusting piece 43 provided on the lower surface of the upper mold 42, and the thrust When the piece 43 further descends, the pressing force applied to the scrap receiving piece 52 lowers the top of the scrap receiving piece 52 from the horizontal state to the inclined state as shown in FIG. And is retracted to a position in the direction of the space 51 that does not hinder the fall of the punched hole c.

JP 2001-121485 A

By the way, in the conventional punching waste receiving tool, the scrap receiving piece 52 is a swingable support, and when the punching waste receiving piece 52 starts swinging, the magnet 55 is separated from the steel plate piece 56 immediately. The force to maintain the upper surface in a horizontal state is lost, and if the swinging piece 43 starts to swing from the state in which the punching piece 43 is pinched by the pushing piece 43, the upper surface is inclined and the pinching force against the punching hole waste c decreases rapidly. There is an inconvenience that the joint with the product part is broken and the punched hole c cannot be reliably pushed out and removed.

Further, after the scrap receiving piece 52 swings downward, the scrap receiving piece 52 is brought to a horizontal position by a rotational moment in the direction of the steel plate piece 56 due to the weight of the lower half 54 of the scrap receiving piece supporting the magnet 55. Since it is configured to return and rotate, if a piece of paper or paper dust generated by the punching-out of the punching hole c becomes clogged between the swing center of the punching piece receiving piece 52 or between the punching piece receiving piece 52 and the inner surface of the space portion 51. There is a case where the rotational resistance becomes lower, and the upper surface of the punching piece receiving piece 52 cannot be returned to the horizontal state and rotated, and there is a disadvantage that the reliability of the punching of the punching hole waste c is low.

Furthermore, since the clamping force between the pushing piece 43 and the scrap receiving piece 52 is weak, when the external scrap formed around the product portion is pushed down, the width dimension of the external scrap is increased to widen the clamping area. Since it becomes necessary to pick up, the part which becomes external scrap increases, and a big waste arises. Since the number of sheets S to be processed is enormous, this waste is considerable and the production cost is considerably increased.

Also, since the clamping force between the thrusting piece 43 and the scrap receiving piece 52 is weak, there is also a disadvantage that even if the sandwiching area of the external scrap is wide, the external scrap cannot be reliably pushed out and removed.

An object of the present invention is to provide a highly reliable punching waste holder and stripping device that can reduce the waste of a sheet and reliably remove punching waste.

In order to solve the above-mentioned problem, the punching waste receptacle according to the present invention comprises a pair of opposing side plates, and a stripping device having a receiving claw storage space opened between the side plates and opened on the front side and the upper side. A holder attached to the lower mold, and a receiver that is incorporated in the receiving nail storage space and supports the punching waste of the punched sheet on the lower mold on the upper surface of the front end located outside the receiving nail storage space. Supporting the punching dust while descending from a state in which the upper surface of the catching nail supporting punching scraps is kept horizontal and the front end is located outside the catching nail storage space between the claws and the pair of side plates. Guide means for guiding the catch tab to descend in an oblique direction until it is positioned in the outer catch jaw storage space where the release is released, and then raising it to the original position; and Lifted by guidance at It had adopted a structure comprising an elastic member for urging upward so that.

As a guide means for guiding the receiving claws so as to be movable up and down in an oblique direction, an inclined guide hole formed on each of a pair of opposed side plates and extending in the vertical direction, the upper end of which is positioned on the front edge side of the side plate from the lower end In addition, it is possible to adopt a configuration including a guide protrusion provided on the side surface of the receiving claw and slidably inserted into the guide hole.

As described above, by making the receiving claw freely movable up and down in an oblique direction while keeping its upper surface horizontal, the punching waste is fixed by the punching member that pushes the punching waste when the punching waste is pushed down from the punching sheet. It can be pushed down in a state where it is pinched with a firm clamping force, and the catching nail moves down to the position in the outer catching nail storage space where the support of the punching scrap is released, so the punching scrap is securely Can be pushed down.

Here, at the front edge of at least one side plate of the pair of opposed side plates located on both sides of the receiving claw storage space, the upper surface is inclined with a downward slope, and the receiving claw is lowered to a position where the support of the punching waste is released. In this case, by providing a projecting piece whose tip part faces the peripheral part of the upper surface of the punching waste, the projecting piece prevents the punching waste that is about to be discharged downward by the dropping member and the catching nail from moving upward. The punching waste can be reliably dropped and discharged to a lower position.

In order to solve the above problems, in the stripping apparatus according to the present invention, a lower mold for supporting the product portion of the punched sheet in which the product portion and the punched waste are formed by forming the punching cutting line, An upper die provided on the die, and a punching member for dropping punching scraps is attached to the lower surface of the upper die, and the scraping members are punched by the punching member by the relative movement of the lower die and the upper die in the vertical direction. In the stripping device, the punching waste holder according to the present invention is supported on the lower mold, and the upper surface of the tip of the catching nail supports a part of the peripheral portion of the lower surface of the punching waste. Therefore, a configuration is adopted in which the punching scraps are attached so as to move downward while sandwiching a part of the punched scraps.

Further, in another stripping apparatus according to the present invention, a lower mold that supports the product portion of the punched sheet in which the product portion and the punched waste are formed by forming the punching cutting line, and the lower mold is provided on the lower mold. A punching member for punching punching scraps is attached to the lower surface of the upper die, and punching scraps are pushed down by the punching member by the relative movement of the lower die and the upper die in the vertical direction. In the stripping device, a catching claw is provided below to hold punched waste of the punched sheet with the punching member from above and below, and the catching nail holds the punching scrap while descending in a state where the upper surface is kept horizontal by pressing down of the punching member. The receiving claw is supported so as to be able to move up and down in an oblique direction so as to move to a position where it is released, and the receiving claw is urged upward by an elastic member. It is.

As described above, in the present invention, the catching nail that clamps the punching scraps from above and below with the drop-off member can be moved up and down in an oblique direction while keeping the upper surface horizontal, so the catching nail is punched with the drop-off member. In the state where the scrap is clamped with a certain firm clamping force, it will descend smoothly in an oblique direction and gradually release the clamping, and the punching scrap is a strong connection between the product part and the connecting part Also, the punching scraps can be reliably pushed down and removed by the push-down member and the catch.

Further, since the catching claw can be raised and lowered, and the catching claw is urged upward by the elastic member, the catching claw can be forcibly returned to the rising stop position, and the return movement can be performed by a piece of paper or paper dust. There is no hindrance, and it is possible to obtain a punching waste holder with high reliability of punching dust removal.

Further, since the punching waste can be securely held by the push-off member and the catching nail, when the external waste as punching waste formed around the product part is pushed down, the width of the external waste is small and the holding part Even if the amount is small, it is possible to reliably push out the external scraps and reduce the waste of the punched sheet, and thus it is possible to prevent an increase in the production cost of the punched sheet that is an enormous number of sheets to be produced.

Plan view of female die of stripping device according to this invention Sectional view along the line II-II in FIG. The top view which expands and shows the attachment part of the punching waste receptacle of FIG. Sectional view along line IV-IV in FIG. Cross-sectional view immediately after starting punching Cross-sectional view showing the fall state of the punch hole waste The top view which shows the other example of a punching waste receptacle Sectional view along line VIII-VIII in FIG. Sectional view along line IX-IX in FIG. Sectional drawing which shows the other example of a punching waste receptacle Sectional view showing the punched-out state of the punched hole waste Longitudinal front view showing another example of stripping apparatus according to the present invention Sectional drawing which shows the state at the initial stage of the external scrap of the stripping apparatus shown in FIG. Cross-sectional view showing the finished state of external scraping Plan view showing an example of a sheet punched by the punching device A longitudinal front view showing a conventional punching waste holder Longitudinal front view showing the removal state of conventional punched-out scrap

Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the sheet conveying apparatus 1 has a pair of opposed chains 2, a pair of gripper bars 3 passed between the pair of chains 2, and a gripper 4 that can be opened and closed is provided on the gripper bar 3. Then, the front side portion that becomes the scrap of the punched sheet S after the punching process is conveyed in the direction of the arrow in the figure while being sandwiched by the gripper 4.

Here, FIG. 15 shows an example of the punched sheet S punched by the punching device. The punching sheet S, stamped cutting line L ₁ of products and the same shape to be formed is formed, the inside of the punching cutting lines L ₁ is a product portion a, the outside of the product section a stamped scrap It is regarded as a certain external scrap b. Further, the inside of the product portion a is provided vent hole cutting line L _2, the inside of the vent hole cutting line L ₂ is a vent Anakuzu c is punched debris.

FIGS. 1 and 2 show a state in which the punched sheet S after the punching process is conveyed to the stripping position by the sheet transfer device 1. As shown in FIG. 2, a stripping device 10 is provided at the stripping position. The stripping apparatus 10 includes a female die 11 that is a lower die provided below, and a male die 12 that is an upper die provided on the upper side to face the female die 11.

The female mold 11 and the male mold 12 are relatively movable in the vertical direction so as to approach and separate from each other. In the embodiment, the male mold 12 is movable up and down, but the female mold 11 may be movable up and down. The female die 11 has substantially the same shape as the gripping allowance d provided on the product part a of the punched sheet S and the gripper 4. However, the part corresponding to the product part a is slightly smaller than the product part a. The female die 11 is provided with a waste discharge hole 13 as a drop discharge path at a position corresponding to the punched hole waste c of the punched sheet S.

On the lower surface of the male mold 12, a pressing plate 14 having substantially the same shape and the same size as the product portion a of the punched sheet S is attached via an elastic member 15 such as a sponge. Further, on the lower surface of the male mold 12, at the position facing the outer scrap b of the punched sheet S, at the position facing the scraping member 16 for the outer scrap that pushes down the outer scrap b and the punch hole scrap c, A punching member 17 for punching hole scraps that pushes down the punching hole scraps c is provided. The holding plate 14 is provided with an insertion hole 14a through which the punch hole scraping member 17 can be inserted and moved downward, and the end portion of the pressing plate 14 can be moved through the scraping member 16 for outer scrap. It is formed in a large size.

As shown in FIGS. 3 and 4, a punching waste holder 20 is attached to a position facing the inner periphery of the waste discharge hole 13 formed in the female die 11.

The punching waste receptacle 20 has a holder 21 attached to the female die 11 and a punching member 17 for punching dust that supports a part of the outer peripheral portion of the lower surface of the punching hole scrap c of the punching sheet S. The holder 21 includes a pair of opposing side plates 23, and the upper surface of the upper portion of the holder 21 and the front side portion (the waste discharge hole 13 side) between the side plates 23. ) Is configured to be provided with a receiving claw storage space 24 that opens on the front surface.

Also, a pair of attachment pieces 25 are provided at the upper end of the outer side surface of the holder 21 so as to project laterally from around the waste discharge hole 13. Each of the pair of opposed holders 21 is fitted into a holder fitting hole 18a formed at a position opposite to the inner periphery of the waste discharge hole 13 of the female die 11, and a female is secured by screwing the mounting piece 25. Attached to the mold 11.

In this case, a fitting recess 19 into which the attachment piece 25 is fitted is formed on the upper surface of the female die 11 so that the upper surface of the attachment piece 25 is held at the same height as the upper surface of the female die 11. However, the fitting recess 19 may be omitted, and the mounting piece 25 may be supported on the upper surface of the female die 11.

The receiving claw 22 is incorporated in the receiving claw storage space 24, and the upper surface of the receiving claw 22 that supports the punch hole scrap c between the pair of side plates 23 that form the opposing side surfaces of the receiving claw 22 and the receiving claw storage space 24. Of the outer claw that releases the support of the punched-hole waste c while descending from the state where the tip is projected and positioned in the front side waste discharge hole 13 outside the claw receiving space 24 while maintaining the horizontal position. Guide means 30 is provided that guides the catch tab 22 so that it can be moved up and down so that it is lowered in an oblique direction until it is located in the space 24 and then raised to its original position.

The guide means 30 includes a guide hole 31 that is formed in each of the pair of opposed side plates 23 of the holder 21 and is inclined in the vertical direction, and a guide protrusion 32 provided on the side surface of the receiving claw 22. The protrusion 32 is slidably inserted into the guide hole 31.

Here, as the guide hole 31, the upper end is positioned on the front edge side of the side plate 23, and the lower end is a linear inclined hole extending in the vertical direction and positioned on the rear edge side of the side plate 23 from the upper end. An example is shown in which the upper end is located on the front edge side of the side plate 23 and the lower end is located on the rear edge side of the side plate 23 from the upper end and extends in an up-down direction. Alternatively, it may be composed of a compound-shaped inclined hole in which the upper part is linear and the lower part is arcuate.

Here, as shown in FIG. 9, the guide protrusion 32 may be made of a pin, or may be made of a rectangular protrusion that is long in the vertical direction. As shown in FIG. 4, in the case where the guide protrusion 32 is a pin, an inclined guide pin 33 parallel to the guide hole 31 is provided on the lower surface of the receiving claw 22, and the lower portion of the guide pin 33 is received. The claw 22 is slidably inserted into a guide hole 34 formed in the bottom wall of the holder 21 located below the claw storage space 24 to prevent the receiving claw 22 from rotating around the pin.

An elastic member 35 made of a spring having a length extending from the lower surface of the receiving claw 22 to the upper surface of the bottom wall of the holder 21 is provided on the outer periphery of the guide pin 33. The elastic member 35 urges the receiving claw 22 upward, and the urging force causes the receiving claw 22 to be guided to the original position by the guide means 30, so that the upper end of the guide projection 32 is located at the guide hole 31. It will be in a state of being pressed to the upper end.

The stripping apparatus 10 shown in the embodiment has the above-described structure, and as shown in FIG. 2, the punched sheet S is carried to a position where it is supported on the upper surface of the female die 11 of the stripping apparatus 10 as shown in FIG. When stopped, the male mold 12 is lowered. The product part a of the punched sheet S is elastically pressed by the presser plate 14 by the action of the elastic member 15 by the lowering of the male mold 12.

When the male mold 12 is further lowered, the outer scrap scraping member 16 passes the outside of the end portion of the press plate 14 so as to cut the outer scrap b of the punched sheet S at the connecting portion with the product portion a and push it down. The punch hole scrap c is sandwiched between the punch hole scraping member 17 and the catch nail 22 of the punch scrap holder 20, and the punch hole scrap c is pressed in the sandwiched state. Be lowered.

At this time, the catching claw 22 is lowered with the upper surface thereof kept horizontal as shown in FIG. Further, the punching member 17 for punching hole scraps in a state where the receiving claw 22 resists a strong force moving upward by the action of the elastic member 35 against the strong force moving downward of the punching member 17 for punching hole scraps. And the receiving pawl 22 are both lowered. For this reason, the punch hole waste c moves downward in a state where a part of the outer periphery of the punch hole scrap is sandwiched by a fixed and firm clamping force, and at this time, the portion where the punch hole scrap c is sandwiched Even if there is a slight amount, and even if the connecting state with the product part a is strong, the connecting part is cut and separated from the product part a.

Further, since the catch pawl 22 descends obliquely rearward (the rear edge side of the side plate 23) along the guide hole 34, the upper surface of the catch pawl 22 is smoothly lowered from the ascending stop position to the descending stop position while maintaining a horizontal state. The tip of the upper surface (front edge) of the catch claw 22 moves away from the outer periphery of the punch hole scrap c while gradually moving outward (rearward) toward the position where the support of the punch hole scrap c is released. When moving in the outward direction (rearward) on the claw receiving space 14 side to a position that does not hinder the dropping of the scrap c, the punch hole scrap c is dropped and removed as shown in FIG.

At this time, since the tip of the receiving claw 22 is in a state of being retracted from the hoistway of the punch hole scraping member 17, the punching member 17 is not pushed down by the punch hole scraping member 17. The state which contacts the outer peripheral surface of 17 is maintained and does not descend.

When the male mold 12 is lowered by a certain stroke, it rises next, and when the punch hole scraping member 17 passes the position of the receiving claw 22, each of the receiving claws 22 is raised by the pressing of the elastic member 35 and is shown in FIG. Return to the standby position, which is the ascending stop position.

In this way, the punch hole c is pushed down in a state where a part of the outer periphery is clamped with a fixed clamping force by the receiving claw 22 that can be moved up and down with the upper surface horizontal and the punching member 17 for the punch hole scrap. For this reason, it is reliably separated from the product part a and dropped and discharged.

Further, since the vertically movable receiving claw 22 is urged upward by the elastic member 35, even if a piece of paper or paper dust enters between the receiving claw 22 and the side plate 23 of the holder 21, the receiving claw 22 is forced Therefore, there is no inconvenience that the return movement is prevented and the return movement is hindered by a piece of paper or paper dust.

In the embodiment, the pair of punched waste receptacles 20 are attached to the inner circumferentially opposed positions of the waste discharge holes 13 formed in the female die 11, but the number of attachments is arbitrary and even one. Good.

Moreover, although the punch hole scrap c and the scrap discharge hole 13 are shown as circular, other shapes may be used.

3 and 4, the attachment piece 25 is provided on the upper end of the outer surface of the holder 21, and the attachment piece 25 is screwed to the upper surface of the female die 11. As shown in FIG. 9, an attachment piece 26 may be provided at the substantially central portion of the outer surface of the holder 21, and the attachment piece 26 may be screwed to the lower surface of the female die 11. In this case, there is no inconvenience that the product part a is scratched, and since it is not necessary to form the fitting recess 19 in the female die 11, the processing can be facilitated.

In the embodiment shown in FIG. 2 to FIG. 6 and the embodiment shown in FIG. 7 to FIG. 9, the receiving claw 22 and the elastic member 35 are assembled in the receiving claw storage space 24 of the holder 21, Each of the claw 22 and the elastic member 35 is formed as a united punching waste receptacle 20, and the punching waste receptacle 20 is attached to the female die 11. It may be incorporated directly into the female mold 11.

As shown in the embodiment, by attaching the unitized punching waste holder 20 to the female die 11, it is possible to facilitate the incorporation of the receiving claw 22 and the elastic member 35.

FIG. 10 shows another example of the punching waste receptacle 20. In this punching waste receptacle 20, the attachment piece 28 screwed to the lower surface of the female die 11 is integrally provided on the outer surface of the holder 21, and the front edges of the pair of opposed side plates 23 (the waste discharge hole 13 side). It differs from the punching waste receptacle 20 shown in FIG. 4 in that a protruding piece 27 is provided on the upper part. The protruding piece 27 may be provided on at least one side plate 23.

For this reason, the same parts as those in the punching waste receptacle 20 shown in FIG.

In the punched scrap receptacle 20, the upper surface 27a is inclined with a downward slope toward the front toward the scrap discharge hole 13 so that the protrusion 27 protrudes toward the scrap discharge hole 13 on the front side of the receiving claw storage space 24. The lower surface 27b is substantially horizontal. Further, as shown in FIG. 11, the projecting piece 27 is formed at a position where the tip faces the outer peripheral portion of the upper surface of the punch hole waste c on the catch claw 22 lowered to the position where the support of the punch hole scrap c is released. .

In adopting the punching waste receptacle 20 having the above-described configuration, when the male mold 12 is lowered from the state shown in FIG. 10, the push-off member 17 attached to the male mold 12 is urged upward by the elastic member 35. The claw 22 descends in the vertical direction while firmly holding the outer peripheral portion of the punched hole c with the horizontal upper surface of the catch claw 22. Since the lowering part breaks the connecting part with the product part a, the punch hole c is separated from the product part a.

The separation hole c after separation passes through the position of the projecting piece 27 by the push-down member 17 being pushed down. As shown in FIG. 11, when the punch hole c is lowered to a position below the projecting piece 27 and the catching claw 22 releases the pinch of the punch hole scrap c, the male mold 12 is raised.

When the male mold 12 is raised, the punch hole c usually drops downward. However, sometimes the punch hole 17 is lifted together with the push-down member 17 in close contact with the lower surface of the push-off member 17, or the punch hole scrap c is strongly clamped. There is a case where it is soared by the recoil of its power.

Even if the punched hole c is about to move upward, the tip of the projecting piece 27 faces the outer peripheral portion of the upper surface of the punched hole scrap c. The contact hole is brought into a stopped state, and the punch hole waste c falls downward.

Thus, since the upward movement of the punch hole waste c can be prevented by the protruding piece 27, the punch hole waste c can be reliably dropped and discharged to the lower position, and the next punch hole waste c can be removed. It does not interfere with the action.

12 to 14 show other examples of the stripping apparatus according to the present invention. In this example, a holder fitting hole 18b is provided on the outer periphery of the female die 11, and the upper part of the holder 21 of the punching waste receptacle 20 similar to that shown in FIG. The attachment piece 28 abutted against the lower surface of the die 11 is screwed to the female die 11 and the punching waste receptacle 20 is punched with the tip end of the catch claw 22 facing outwardly from the side opposite to the female die 11 side. It is attached so that the external scraps b of the sheet S can be supported.

In the stripping device having the above-described configuration, when the male mold 12 is lowered from the state positioned above the punched sheet S as shown in FIG. 12, the external scrap scraping member 16 attached to the male mold 12 is elastic. It descends in the vertical direction in a state where the inner peripheral portion of the external scrap b is firmly clamped by the horizontal upper surface of the catch claw 22 biased upward by the member 35. Since the connecting portion with the product portion a is broken by the descending, the external scraps b are separated from the product portion a.

FIG. 13 shows a state of initial separation of the external waste b from the product part a, and FIG. 14 shows a state where the external waste b is completely separated from the product part a. In the completely separated state, the tip end of the projecting piece 27 faces the upper peripheral portion of the upper surface of the external scrap b, so that the external scrap b is prevented from moving upward.

When the external scraps b are pushed down as described above, with the push-off member 16 in a state in which the receiving claw 22 resists the strong force moving upward by the action of the elastic member 35 against the strong force moving downward of the push-off member 16. Since the upper surface of the catching claw 22 is lowered, the push-off member 16 and the catching claw 22 are pushed down in a state of firmly holding the outer scrap b, so that the width of the outer scrap b is small and sandwiched. Even if the portion is small or even if the connecting state with the product part a is strong, the connecting part is surely broken and the external scrap b is reliably separated from the product part a and pushed down. be able to. For this reason, since the width dimension of the external scrap b can be reduced and the waste of the punched sheet S can be reduced, an increase in the production cost of the punched sheet S, which is an enormous number of sheets produced, can be prevented.

It should be noted that a plurality of punching waste receptacles 20 are attached to the outer periphery of the female die 11 when the external waste b is pushed down as described above.

11 Female type (lower type)
12 Male (upper)
13 Waste discharging hole 16 External scraping push-out member 17 punching waste scraping member 20 Punching waste catcher 21 Holder 22 Receiving claw 23 Side plate 24 Receiving claw receiving space 27 Protruding piece

27a Upper surface

27b Lower surface 30 Guide means 31 Guide hole 32 Guide protrusion Part 35 elastic member

Claims

A holder having a pair of opposing side plates, having a receiving claw storage space opened between the side plates and opened on the front side and the upper side, attached to the lower mold of the stripping device, and incorporated in the receiving claw storage space. A receiving claw for supporting punching waste of the punched sheet on the lower mold on the upper surface of the front end located outside the nail storage space, and a receiving claw for supporting punching waste between the pair of side plates. From the state in which the upper surface is kept horizontal and the tip is positioned in the front side outside the nail receiving space to the state in which it is positioned in the outer nail receiving space where the support for the punching waste is released while descending, Punching waste comprising guide means for lowering in an oblique direction and then raising it to the original position, and an elastic member for biasing the catching claw upward to guide the catching claw to rise Receiving tool.
The guide means is formed on each of the pair of opposed side plates and extends in the up-down direction, the upper end of which is provided on the front edge side of the side plate from the lower end, and the guide means is provided on the side surface of the receiving claw. The punched waste receptacle according to claim 1, comprising a guide protrusion slidably inserted into the hole.
When the upper surface is inclined with a downward slope to the front edge of at least one side plate of the pair of opposed side plates located on both sides of the receiving claw storage space, and the receiving claw is lowered to a position where the support of punching waste is released. The punching waste receptacle according to claim 1 or 2, further comprising a protruding piece whose front end faces the peripheral portion of the upper surface of the punching waste.
A lower die that supports the product portion of the punched sheet on which the product portion and the punched waste are formed by forming a punching cutting line, and an upper die provided on the lower die, on the lower surface of the upper die Is a stripping device in which a punching member for punching scraps is attached, and punching scraps are pushed down by the punching member by the relative movement in the vertical direction of the lower mold and the upper mold.
The punching waste receptacle according to any one of claims 1 to 3 is punched by the lower die, with the upper surface of the tip of the catching nail supporting a part of the lower surface of the punching waste and the punching member. A stripping device, wherein the stripping device is attached so as to move downward while sandwiching a part of the peripheral portion of the waste.
A lower die that supports the product portion of the punched sheet on which the product portion and the punched waste are formed by forming a punching cutting line, and an upper die provided on the lower die, on the lower surface of the upper die Is a stripping device in which a punching member for punching scraps is attached, and punching scraps are pushed down by the punching member by the relative movement in the vertical direction of the lower mold and the upper mold.
A receiving claw for holding punch scraps of the punched sheet from above and below with the dropping member is provided below, and the holding pawl is lowered in a state that keeps the upper surface horizontal by pushing down of the dropping member, to the position where the clamping scrap is released. A stripping device characterized in that a catching claw is supported so as to move up and down in an oblique direction so as to move, and the catching claw is urged upward by an elastic member.