JP5145475B2 - Punching waste holder and stripping device - Google Patents

Description

  The present invention relates to a punching waste holder and a stripping device for a stripping device that separates and removes 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.

  By the formation of the punching and cutting line, external scraps are formed around the product portion, and in some cases, punched-out scraps are formed in the product portion. 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 as punching scraps are connected to the product portion through a slight connecting portion. 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 an upper die having the same shape as the product portion, is provided on the sheet transfer path, and a scraping member for outer scrap that pushes outer scrap on the lower surface of the male die, A punching member for punching hole scraps that sticks punching hole scraps is attached. On the other hand, a female die, which is a lower mold disposed opposite to the male mold, has a scrap discharge as a fall discharge passage at a position facing the punching hole scraps. A hole is formed, and when the male mold is lowered, the scraping member removes external scraps and punched scraps as punch scraps.

  By the way, when the punched-out scrap is formed in the product part and the punched-out scrap is relatively small, or when the width of the external scrap is relatively small, the punched-out scrap is completely removed from the product part only by pushing down the thrusting member. Sometimes it cannot be separated.

  Therefore, in the punching waste removing device described in Patent Literature 1 or Patent Literature 2, a punching waste holder is attached to the female die, and the lower surface outer peripheral portion of the punching waste is supported by the punching waste receptacle, and used for scraping off the scrap. When the punching scraps are pushed down by the lowering of the punching member, the punching scraps are sandwiched from above and below by the punching member and the punching scrap holder.

  Here, FIG. 19 and FIG. 20 show the punching waste receptacle described in the above-mentioned 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 shaft 53, and the scrap receiving piece 52 extends horizontally from the front opening of the space 51 into the scrap discharge hole 41 and extends downward from the swing center. A magnet 55 is fixed to the surface of the portion 54 facing the front wall of the space 51, and the scrap receiving piece 52 is received by the action of the magnet 55 adsorbing the steel plate piece 56 fixed to the front wall of the space 51. It keeps in the horizontal state which protrudes in the waste discharge hole 41. FIG.

  In the punching scrap removing device that employs the punching scrap holder described above, the lower punching scraps c formed on the punched sheet S are supported by the punching scraper pieces 52 in a horizontal state, and when the upper die 42 is lowered, A punching piece 43 provided on the lower surface of the upper die 42 holds the punching hole waste c, and the pushing piece 43 further moves downward to apply a pressing force to the punching piece receiving piece 52. As shown in FIG. 20, the scrap receiving piece 52 is swung downward so that its upper surface changes from a horizontal state to an inclined state, and is retracted to a position in the direction of the space 51 that does not hinder the fall of the punch hole scrap c. I am doing so.

  On the other hand, in the punching waste receptacle described in Patent Document 2, two parallel links in which a piece receiving piece having a small area on the upper surface that receives punching waste in a pin shape whose both ends are up and down are arranged vertically. Therefore, it connects with the support bracket attached to the lower surface of a lower mold | type, and it is set as the structure which urges | biass a scrap receiving piece upwards with the spring connected with the edge part by the side of the support bracket of an upper parallel link.

  In the punching scrap removal device that employs the punching scrap holder, the support bracket is fixed to the lower surface of the lower die so that the upper end of the punch receiving piece is disposed in the scrap discharge hole formed in the lower die. The upper die is lowered while the upper surface of the punched piece receiving piece slightly supports the lower surface of the punched hole waste formed on the punched sheet, and the punched hole waste is pushed in the form of a pin provided on the lower surface of the upper die. The punched piece is pinched from above and below by the pushing piece with a small area on the bottom surface to be pressed and the scrap receiving piece with a small area on the top surface. Try to separate. Further, the pressing force applied to the scrap receiving piece from the pushing piece moves the scrap receiving piece to the support bracket side while lowering it while maintaining the vertical state. As a result of the displacement of the support position of the punched hole scrap, the punched hole scrap after separation is inclined, and the return operation of the punch receiving piece is delayed during the return operation in which the upper mold moves up from the lower limit position. I try to let it fall and discharge.

Patent Document 1: Japanese Patent Application Laid-Open No. 2001-121485 Patent Document 2: Japanese Patent Application Laid-Open No. 4-25399

  By the way, in the punching waste receiver described in the above-mentioned Patent Document 1, the punching piece receiving piece 52 is a swingable support, and when the punching piece receiving piece 52 starts swinging, the magnet 55 becomes a steel plate piece. When the force to immediately leave the surface 56 and maintain the upper surface in a horizontal state disappears and the swinging piece 43 starts to swing from the state of holding the punched hole c with the pushing piece 43, the upper surface is inclined to pinch the punched hole c. Has a disadvantage in that it cannot be removed by removing the punched hole c reliably by breaking the joint with the product portion.

  Further, after the scrap receiving piece 52 swings downward, the scrap receiving piece 52 is moved 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 52 that supports the magnet 55. Therefore, when a piece of paper or paper dust generated by the punched-out scrap c is stuck between the swinging central portion of the punch receiving piece 52 or between the punch receiving piece 52 and the inner surface of the space 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. There is a disadvantage that a lot of material loss occurs because it is necessary to take it.

  On the other hand, in the punching waste receptacle described in Patent Document 2, when the punching dust is pushed down, the punching waste receiving piece moves to the support bracket side while maintaining a vertical state. It is necessary to ensure a large space between the inner peripheral surfaces of the waste discharge holes formed in the lower mold and to prevent the scrap receiving pieces from coming into contact with the inner periphery of the waste discharge holes.

  For this reason, when the punched hole scrap is small, a large gap is generated between the outer periphery of the punched hole scrap and the inner periphery of the scrap discharge hole. It becomes impossible to support the adjacent part. Further, since the area of the lower surface of the pushing piece and the area of the upper surface of the scrap receiving piece are small, similarly, it is impossible to sandwich the adjacent portion of the outer periphery of the punch hole scrap. As a result, when the upper die pushing piece pushes down the punch hole waste, the outer periphery of the punch hole waste is elastically deformed downward, and a large shearing force cannot be applied to the joint part with the product part. There is an inconvenience that the connecting portion cannot be reliably broken.

  In addition, since the area of the bottom surface of the thrust piece and the area of the top surface of the scrap receiving piece is small, and the scrap receiving piece moves to the support bracket side, Since the clamping force is immediately weakened, there is a disadvantage in that the punch hole waste is normally separated from the product portion and cannot be dropped and discharged.

  Furthermore, since it is necessary to ensure a large space between the upper outer periphery of the scrap receiving piece and the scrap discharge hole, it is described in Patent Document 1 when the outer scrap formed around the product portion is pushed down. Similar to the punched scrap holder, it is necessary to increase the width of the outer scrap to increase the clamping area, resulting in a large amount of material loss.

  Moreover, since the scrap receiving piece is located in the fall discharge passage of the punch hole waste in its lowered state, it will inhibit the fall of the punch hole waste, and the punch hole waste is often clogged in the fall discharge passage. There is also an inconvenience that the punch hole waste cannot be reliably dropped and discharged.

  Furthermore, since the scrap receiving piece and the support bracket are connected by a parallel link, if the number of shots to be punched increases, there will be play in the connecting portion of the parallel link and the scrap receiving piece and the connecting portion of the parallel link and the support housing. It tends to occur and has a problem with durability.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a punching waste holder and a stripping device excellent in durability that can reduce waste of a sheet and reliably drop and discharge punching scraps by knocking down.

  In order to solve the above-mentioned problem, in the punching waste receptacle according to the present invention, the punching sheet is supported by the lower die of the stripping device, and the product part and the punching waste are connected by a cutting line that forms a connecting part. The punching scrap of the upper die is attached to the lower die by the dropping member attached to the lower surface of the upper die, and one surface of the outer periphery is opposed to the fall discharge passage, and the upper surface forms the same surface as the upper surface of the lower die The holder attached to the lower mold is formed with a storage space that opens on the entire outer surface thereof, and a receiving member is assembled in the storage space, and the front end of the receiving member faces the fall discharge passage from the storage space. The position where the product line of the punched sheet where the cutting line is located above the fall discharge passage and the lower surface of each part of the punched scrap are supported by the plane is defined as the lift stop position. By pushing down the punching scraps at the periphery of the punching member, the upper surface is lowered in a state of being kept horizontal while moving backward in the direction of being accommodated in the storage space, and the lower surface of the punching member exceeds the thickness of the punching sheet. Guide means for sliding and guiding the receiving member obliquely downward is provided in the storage space so as to move backward to a position where the support of punched waste is released within the range until reaching the lower limit position, and the receiving member is moved upward by an elastic member. The configuration that was urged toward the

  Here, as guide means for sliding and receiving the receiving member obliquely downward, an inclined guide hole formed on each of the pair of opposed side plates in the storage space and extending in the vertical direction is provided on the side surface of the receiving member. The guide protrusion is slidably inserted into the guide hole, and a guide pin parallel to the guide hole is provided on the lower surface of the receiving member, and the guide pin is formed on the bottom wall of the holder that forms the storage space. It is possible to employ a configuration in which the receiving member is slidably inserted into the formed guide hole and the receiving member is urged upward by an elastic member provided on the outer periphery of the guide pin.

  As described above, by making the receiving member slidable obliquely downward with its upper surface kept horizontal, when punching scraps from the punching sheet, the punching scraps are fixed with the punching member that thrusts the punching scraps. It can be pushed down in a state of being clamped with a firm clamping force. For this reason, a connection part with a product part can be fractured reliably.

  Further, since the receiving member moves down to a position where the support of the punching waste is released, the punching waste can be reliably dropped and discharged without hindering the punching scrap from dropping.

  In order to solve the above problems, in the 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 connected by a cutting line that forms a connecting portion; A stripping device having an upper die provided on the lower die, and thrusting off punching scraps by a sticking member attached to the lower surface of the upper die by the relative movement of the lower die and the upper die in the vertical direction. In the lower die, a notch is formed on the peripheral surface of the punching scrap facing the falling discharge passage, and the upper part of the holder of the punching scrap holder according to the present invention is fitted into the notch, Is held at the same height as the upper surface of the lower die, and the holder is attached to the lower die so that the tip of the receiving member supports the lower surface of the punched scrap.

  As described above, in the present invention, when the receiving member is made to slide obliquely downward with the upper surface thereof kept horizontal, the punching member that pushes the punching waste when punching the punching waste from the punching sheet. The punching scrap can be pushed down in a state where it is clamped with a certain firm clamping force, and the receiving member that moves obliquely downward enters the storage space, so as a fall discharge passage formed in the lower mold It is no longer necessary to secure a large gap between the inner periphery of the scrap discharge hole and the outer periphery of the punched scrap as punching scrap or between the outer periphery of the lower mold supporting the product part and the outer periphery of the outer scrap as punching scrap. When the member is pushed down, a large shearing force can be applied to the connecting portion between the punched scraps of the punched hole scraps and the external scraps and the product portion. As a result, the connecting portion can be reliably broken, so that the punching waste can be reliably separated.

  In addition, since the lower surface of the push-out member exceeds the thickness of the punched sheet and reaches the lower limit position, it is moved backward to the position where the support of the punched waste is released, so that the receiving member inhibits the fall of the punched waste. The punching waste can be reliably dropped and discharged.

  Furthermore, the punching waste holder is excellent in durability compared to the punching waste holder that supports the punching waste receiving piece with a parallel link by supporting the receiving member so as to be slidable obliquely downward. In addition, since the receiving member is urged upward by the elastic member, the receiving member 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.

  In addition, since the punching waste can be firmly held by the push-off member and the receiving member, 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, the external scrap can be reliably pushed down and the material loss of the punched sheet can be reduced.

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 The top view which shows the other example of the stripping apparatus concerning this invention Sectional view along line XIII-XIII in FIG. Sectional drawing which shows the state at the initial stage of the external scraping down by the stripping apparatus shown in FIG. Cross-sectional view showing the finished state of external scraping Longitudinal front view showing another example of receiving member Plan view of FIG. 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

  Embodiments of the present invention will be described below 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. 18 shows an example of the punched sheet S punched by the punching device. This punched sheet S is formed with a punching cutting line L ₁ having the same shape as the product to be formed, the inside of the punching cutting line L ₁ is a product part a, and the outside of the product part a is punching waste. 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.

In order to prevent the product part a and the punching waste from being separated immediately when the punching process is performed by the punching device, a slight connecting portion is formed at an appropriate interval between the product part a and the punching waste. Cutting lines L ₁ and L ₂ are provided.

  1 and 2 show a state in which the punched sheet S in a state where the product part a and the punched waste are not separated by the sheet transfer device 1 is conveyed to the stripping position. 2 is provided with a stripping apparatus 10 shown in FIG. The stripping device 10 has a female die 11 as a lower die provided below the sheet conveyance path, and a male die 12 as an upper die provided on the upper side so as to face this.

  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 product portion a of the punched sheet S and the gripping allowance d held by the gripper 4, and the outer periphery of the portion supporting the product portion a is about 1 mm to 3 mm from the outer periphery of the product portion a. It is a small size located inside.

  By the punching process, a cutting line is formed between the product portion a and the gripping allowance d so as to form a slight connecting portion at an appropriate interval.

The female die 11 is provided with a waste discharge hole 13 as a drop discharge passage at a position corresponding to the punched hole waste c of the punched sheet S. The waste discharge hole 13 has a large size whose inner circumference is located about 1 mm to 3 mm outside the outer circumference of the punch hole waste c. Here, T ₁ in Figure 2, shows a drop discharge passage of the punching Anakuzu c.

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. In addition, on the lower surface of the male mold 12, a punching member 16 for the external scrap that pushes down the external scrap b and a punching member c that pushes the external scrap b at a position facing the punch scraps c. A punching-out member 17 for punching-out scraps that pushes down so as to push down the scraps c is provided. T _{2 in} FIG. 2 indicates a falling discharge path of the external scrap b, and T ₃ indicates a hoistway of the push-off member 17.

  The presser plate 14 has an insertion hole 14a through which the punched-out scraping member 17 can be inserted. Further, the presser plate 14 is sized so that the outer scrap scraping member 16 can move downward and move around the outer periphery thereof.

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

  The punching waste receptacle 20 has a holder 21 attached to the female die 11 so that one surface of the outer periphery that is rectangular with respect to the waste discharge hole 13 faces, and one of the outer peripheral portions of the lower surface of the punching hole scrap c of the punching sheet S. And a receiving claw 22 as a receiving member for holding the punched hole scraps c from above and below with the punching member 17 for punched hole scraps.

  In addition, the part which receives the punching hole waste c on the upper surface of the receiving claw 22 has an area of a predetermined size that can firmly receive and support a predetermined range of the punching hole waste c.

  The holder 21 has a pair of opposed flat side plates 23, and the holder 21 is opened between the opposed pair of side plates 23 on the upper surface of the holder 21 and the front surface which is one outer surface facing the waste discharge hole 13. A storage space 24 is provided.

  A step is formed on the upper surface of the catch claw 22 so that the upper surface portion that protrudes into the waste discharge hole 13 and receives the punch hole waste c is a high surface, and the upper surface portion on the storage space 24 side is a lower surface. The upper surface of the holder 21 is configured not to be opened, and when the receiving claw 22 is moved to the raised position, the upper surface of the holder 21 is flush with the upper surface of the female die 11 so that these surfaces are The same surface may be formed.

  In addition, an attachment piece 25 is provided on each upper end of the pair of opposed side plates 23 of the holder 21 so as to project outward. The respective upper portions of the pair of opposing holders 21 are fitted into notches 18a formed at opposing positions on the inner peripheral surface 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.

  At this time, a fitting recess 19 into which the mounting piece 25 can be fitted is formed on the upper surface of the female die 11, and the mounting piece 25 is fitted into the fitting concave portion 19, so that the upper surface of the holder 21 is the upper surface of the female die 11. It is set as the attachment which forms the same surface so that it may become the same height.

  When the width dimension between both side surfaces of the receiving claw 22 is small, the punch hole member c cannot firmly hold the punch hole scrap c, so that the width dimension exceeds 5 mm. It has a support area of a predetermined size that can stably support the lower surface of the head, and the tip portion is V-shaped with the lower surface formed of a tapered surface, and is made thinner toward the tip. The receiving claw 22 is assembled in the storage space 24, and in the assembled state, a minute interval is formed between the opposing inner side surfaces of the storage space 24 so that the receiving claw 22 can slide.

  A punched sheet between the pair of side plates 23 located on both sides of the receiving claw 22 and the storage space 24 is placed on the female die 11 with the front end of the receiving claw 22 facing the waste discharge hole 13 from the storage space 24. The position where the lower surface of the S punched hole c is planarly supported is defined as the ascending stop position, and is stored in the receiving member storage space 24 while descending in a state where the upper surface is kept horizontal by being pushed down from the ascending stop position. The catch claw 22 is moved back to the position where the support of the punched hole c is released within the range until the lower surface of the punching member 17 reaches the lower limit position beyond the thickness of the punched sheet S. Guide means 30 for sliding and guiding in an obliquely downward direction is provided.

  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.

  The guide hole 31 has an upper end positioned on the front side of the side plate 23 on the side of the waste discharge hole 13 and a lower end positioned on the rear side of the side plate 23 opposite to the upper end. It is said that. At this time, if the inclination angle of the guide hole 31 with respect to the horizontal line is less than 45 °, a large rotational moment is applied to the guide protrusion 32 when the drop-off member 17 is pushed down, the slide resistance increases, and the receiving claw 22 is inclined downward. The guide cannot be slid smoothly and the guide protrusion 32 may be damaged.

  On the other hand, if the inclination angle exceeds 75 °, the lifting / lowering stroke amount of the male mold 12 is increased, so that the catching claw 22 cannot be moved backward to the position where the support of the punched hole waste c is released. Since the vertical dimension of 21 increases and the size of the holder 21 increases, the inclination angle is preferably in the range of 45 ° to 75 °. In the embodiment, the angle is about 55 ° in relation to the vertical stroke amount of the male mold 12.

  The guide hole 31 is not limited to a linear inclined hole, and has an arcuate shape extending in the vertical direction with the upper end positioned on the front side of the side plate 23 and the lower end positioned on the rear surface side of the side plate 23 from the upper end. It may be an inclined hole, or may be composed of a compound-shaped inclined hole in which the upper part is linear and the lower part is arcuate.

  Further, as shown in FIG. 9, the guide protrusion 32 may be formed of a pin, or may be formed 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 stored. It is slidably inserted into a guide hole 34 formed in the bottom wall of the holder 21 located at the lower part of the space 24 to prevent the receiving claw 22 from rotating around the pin.

  An elastic member 35 made of a spring is provided on the outer peripheral portion of the guide pin 33 between the lower surface of the receiving claw 22 and the upper surface of the bottom wall of the holder 21. The elastic member 35 urges the receiving claw 22 upward, and by this urging, the receiving claw 22 is held at the ascending stop position where the upper end of the guide protrusion 32 contacts the upper end of the guide hole 31. At the lift stop position, the front end of the catch claw 22 faces the waste discharge hole 13 from the storage space 24 and supports the lower surface of the punch hole waste c of the punched sheet S placed on the female die 11 at the front end. It is supposed to be.

  The stripping apparatus 10 shown in the embodiment has the above-described structure, and as shown in FIG. 2, the product part a, the external waste b, the punch hole waste c, and the gripping allowance d are connected by the connecting part by the sheet transfer device 1. When the punched sheet S is transported to a position where it is supported by the upper surface of the female die 11 of the stripping device 10 and stopped, the male die 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 outer periphery of the end of the presser plate 14 and pushes the outer scrap b. The connecting portion is cut by the depression, and the external scraps b are separated from the product portion a and fall downward. On the other hand, the punch hole scrap c is clamped firmly and stably between the punching member 17 for punch hole scrap and the catch nail 22 of the punch scrap receiver 20 at a part of the outer periphery of the predetermined range. Press down.

  At this time, as shown in FIG. 5, the catching claw 22 is pushed down by the punching-out member 17 for punching hole scraps, and the upper surface having a front end portion that can support the punching hole scraps c with a predetermined support area is kept horizontal. Descend in a state. Furthermore, the punching member 17 for punching hole scraps in a state where the receiving claw 22 resists a strong force directed 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 c is pushed down in a state in which the vertically opposed positions of a part of the outer periphery of a predetermined area are sandwiched by a certain firm clamping force. At this time, the inner periphery of the scrap discharge hole 13 is positioned about 1 mm to 3 mm outside the outer periphery of the punch hole scrap c, and the upper opening edge of the scrap discharge hole 13 is located near the outer periphery of the punch hole scrap c. In order to support it, a large shearing force is applied to the connecting portion between the punch hole scrap c and the product portion a.

  In addition, even if the part where the punching hole waste c is pinched is small, and even if the connection state at the connecting part with the product part a is strong, the connecting part is surely cut. By the cutting, the punch hole c is separated from the product part a.

  FIG. 5 shows a completely separated state of the punch hole waste c, and the punch hole scraping member 17 further descends from this state. Due to the lowering, the receiving pawl 22 moves downward while keeping its upper surface horizontal, and moves backward in the direction of entering the accommodation space 24, and the backward movement gradually reduces the support length of the punch hole waste c. When the punch hole scraping member 17 is lowered to a position slightly before reaching the lower limit position, the catching claw 22 releases the support of the punch hole scrap c as shown in FIG.

  Since the catching claw 22 is retracted to a position where it does not hinder the fall of the punched hole waste c in the released state of the punched hole waste c, the punched hole waste c is naturally not disturbed by the catching nail 22. Fall. Further, the catching claw 22 is not pushed down by the punching hole scraping member 17 and is held in contact with the outer peripheral surface of the punching hole scraping member 17 and does not descend.

  When the male mold 12 is lowered to the lower limit position, the male mold 12 is then raised. When the punch hole scraping member 17 passes the position of the catch claw 22, each of the catch claws 22 is lifted by the pressing of the elastic member 35 and returns to the standby position that is the lift stop position shown in FIG. 4.

  In this way, the predetermined range of the perforated chip c is equal to the outer periphery of the catch claw 22 that can move up and down with the upper surface having a support area of a predetermined size as the horizontal and the punching member 17 for the perforated chip that has a predetermined lower surface. The part is pushed down in a state of being pinched with a certain firm clamping force, and at the time of pushing down, the upper opening edge of the scrap discharge hole 13 supports the adjacent portion on the outer periphery of the punch hole scrap c. It is surely separated and dropped and discharged.

  Further, since the catching claw 22 is slidably supported and is urged upward by the elastic member 35, even if a piece of paper or paper dust enters between the catching claw 22 and the side plate 23 of the holder 21, No. 22 is forcibly returned to the rising stop position by the pressing of the elastic member 35, and there is no inconvenience that 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 waste c and the waste discharge hole 13 are shown in a circular shape, 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, 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 FIGS. 2 to 6 and the embodiment shown in FIGS. 7 to 9, the receiving claw 22 and the elastic member 35 are assembled in the storage space 24 of the holder 21, and the holder 21 and the receiving claw 22 are assembled. Each of the elastic members 35 is formed as a united punching waste holder 20, and the punching waste holder 20 is attached to the female die 11. However, a cutout is formed on the inner peripheral surface of the waste discharge hole 13. A receiving space may be provided, and the receiving claw 22 and the elastic member 35 may be directly incorporated into the receiving space.

  As shown in the embodiment, by attaching the unitized punching waste holder 20 to the female mold 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, a mounting piece 28 screwed to the lower surface of the female die 11 is integrally provided on the rear surface of the holder 21, and the front upper portion of the pair of opposed side plates 23 facing the waste discharge hole 13 is provided. It differs from the punching waste receptacle 20 shown in FIG.

  For this reason, the same code | symbol is attached | subjected to the component same as the punching waste receptacle 20 shown in FIG. 4, and description is abbreviate | omitted.

  Here, the upper surface 27a of the protruding piece 27 is inclined with a downward slope toward the tip, and 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 c on the receiving claw 22 lowered to the position where the support of the punch hole c is released. As long as the projecting piece has a tip at such a position, the shape may not be as described above.

  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 protruding piece 27 by pushing down the dropping member 17. 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 nipping of the punch hole scrap c, the male mold 10 is raised.

  When the male mold 12 is raised, the punch hole c usually drops naturally downward. However, sometimes the punch hole 17 may rise with the push-down member 17 in close contact with the lower surface of the push-off member 17, or the punch hole waste c is strong. There is a case where it rises by the reaction that the pinching force is released.

  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. There is no hindrance to the action.

  12 to 15 show another example of the stripping apparatus according to the present invention. In this example, a plurality of notches 18b are provided on the outer peripheral surface of the female die 11 facing the drop discharge passage, and the holders of the punching waste receptacle 20 similar to those shown in FIG. 10 are provided in the notches 18b, respectively. The upper part of 21 is fitted so that the upper surfaces of the holder 21 and the female mold 11 have the same height so as to form the same surface, and the mounting piece 28 abutted on the lower surface of the female mold 11 is fitted to the female mold. 11 is screwed. At this time, the holder 21 has a predetermined range of the external waste b that is disposed at the rising stop position with the opening on the front side that is the same side as the external waste b side of the storage space 24 facing the fall discharge passage of the external waste b. The attachment is such that a predetermined range of the lower surface of the external scrap b can be supported by the tip of the receiving claw 22 having an upper surface having a support area of a predetermined size that can be stably supported.

  In the stripping apparatus 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. 13, the outer 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. 14 shows a state in which the external waste b is separated from the product part a in the initial stage, and FIG. 15 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 kept in a horizontal state, the external scraps b are pushed down in a state of being firmly held by the dropping member 16 and the catching claw 22. At this time, the outer periphery of the part that supports the product part a of the female mold 11 is located about 1 mm to 3 mm inside from the outer periphery of the product part a, and the upper edge of the outer periphery is located near the inner periphery of the outer scrap b. In order to support it, a large shearing force is applied to the joint between the external scraps b and the product part a.

  For this reason, even if the part where the external scraps b are sandwiched is small, and even if the connection state at the connecting part with the product part a is strong, the connecting part is surely cut. Become. For this reason, the width dimension of the external waste b can be reduced, and the material loss of the punched sea S can be reduced.

  16 and 17 show another example of the receiving claw 22. In this example, the upper surface 22a of the receiving claw 22 is gently inclined toward the tip, and a recess 22b is provided at the center of the upper surface.

  As described above, the upper surface 22a of the receiving claw 22 is an inclined surface that gently slopes toward the tip, and the recess 22b is provided on the upper surface 22a, so that the slide resistance when moving backward while maintaining contact with the external waste b. Can be made small, and the receiving claw 22 can be moved backward smoothly.

11 Female type (lower type)
12 Male (upper)
13 Waste discharging hole 16 External scraping push-out member 17 Opening-hole waste push-off member 20 Punching waste receiving tool 21 Holder 22 Receiving claw (receiving member)
23 Side plate 24 Storage space 27 Projection piece 27a Upper surface 27b Lower surface 30 Guide means 31 Guide hole 32 Guide projection 33 Guide pin 35 Elastic member

Claims (3)

The punching waste of the punched sheet, which is supported by the lower die of the stripping device and is connected to the product part by the cutting line that forms the connecting portion, is pushed down from the lower die by the sticking member attached to the lower surface of the upper die. A storage space that is open on the entire outer surface of a holder that is attached to the lower mold so that one surface of the outer periphery faces the fall discharge passage and the upper surface forms the same surface as the upper surface of the lower mold. Forming and incorporating a receiving member in the storage space, the product portion of the punching sheet and the punching waste in which the leading end of the receiving member faces the drop discharge passage from the storage space and the cutting line is positioned above the drop discharge passage each part lower surface of a planar support position and a raised stop position, the punching by pressing of the circumferential portion of the punching waste by the pushed down member from its raised rest position Giving shearing force to the connecting portion between the product portion and punching scrap sheet, and the upper and lower part periphery of the predetermined area of the receiving the chippings upper surface of the tip between the pushed down member while keeping the horizontal member While supporting the punching waste, it moves backward while moving downward in the direction of being stored in the storage space while holding the opposite position, and the bottom surface of the punching member exceeds the thickness of the punching sheet and reaches the lower limit position. Guide means for sliding and guiding the receiving member obliquely downward is provided in the storage space so as to be released and moved backward to a position that does not hinder the dropping of the punched waste , and the receiving member is directed upward by the elastic member. A punching waste holder that is energized.   The guide means is formed in each of a pair of opposing side plates of the storage space and has an inclined guide hole extending long in the vertical direction, and is provided on a side surface of the receiving member and is slidably inserted into the guide hole. A guide pin parallel to the guide hole is provided on the lower surface of the receiving member, and the guide pin is slidable in a guide hole formed in the bottom wall of the holder that forms the storage space. The punching waste receptacle according to claim 1, wherein the punching waste holder is inserted into the guide pin and urged upward by the elastic member provided on the outer periphery of the guide pin. A lower mold that supports the product portion of the punched sheet in which the product portion and the punched scrap are connected by a cutting line that forms a connecting portion, and an upper mold provided on the lower mold, the lower mold; In the stripping device in which the punching scraps are pushed out by the dropping member attached to the lower surface of the upper mold by the relative movement in the vertical direction of the upper mold,
A notch is formed in the peripheral surface of the lower die facing the falling discharge passage of the punching waste, and the upper part of the holder of the punching waste holder according to claim 1 or 2 is fitted into the notch, A stripping apparatus characterized in that the holder is attached to the lower die in a state where the upper surface is held at the same height as the upper surface of the lower die and the tip of the receiving member supports the lower surface of the punched scrap.

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