JP6470038B2 - Punching device - Google Patents

Description

  The present invention relates to a punching apparatus for punching a sheet-like workpiece, and in particular, a punch mark or a scratch can be made on a conveyed workpiece during a punching operation or a detaching operation after punching. The present invention relates to a punching device devised so as to reduce the property as much as possible.

  2. Description of the Related Art Conventionally, perforated products in which a large number of holes are punched in a sheet-like workpiece formed of metal, plastic, fabric, or the like to form characters, designs, and the like have been widely provided. In manufacturing the perforated product, many punching apparatuses that can form a hole in a workpiece by continuously or intermittently operating the punch are used. With respect to such a punching device, various improvements have been made in the past.For example, various punching devices capable of forming perforated patterns of various shapes or improving the production rate have been studied, Proposed.

  For example, in Patent Document 1 (Japanese Patent Laid-Open No. 7-1005315), a plate to be processed is supplied in the vertical direction in order to provide a perforated product having a perforated pattern corresponding to characters and designs having smooth curved portions. Then, after selectively moving the work plate in the transverse direction perpendicular to the supply direction, the press ram is moved up and down to press the selected punch to form punch holes in the work pattern. A method of punching characters and the like by punching and a punching apparatus are proposed.

  Further, in Patent Document 2 (Japanese Patent Laid-Open No. 8-323695), punching punching that does not cause problems such as trouble in operation of the apparatus or damages the apparatus and can achieve an improvement in the production rate beyond the present level. In order to provide an apparatus, a pressing die portion that can be pressed and released, a plurality of punches provided in the pressing die portion, and a pressing direction of the pressing die portion are provided on the work plate by the punching punch. It is installed so that it can restrain the punch die hole punching hole punching hole punching and the punching punch rear end part when it is punched, and it is linked to the pressing die part press. This is a retainer that can be set depending on whether or not the punch is to punch the processed plate and the punch that does not punch the processed plate depending on whether or not the punch is punched. In the punching punching device having a cutting device and a feeding means that intermittently feeds the work plate in synchronism with the punching operation, the punching punch is movably installed in the pressing direction in the pressing die portion, and An elastic body that urges the punching punch in the pressing direction of the pressing die portion is provided, and the retaining device moves to the rear end portion of the punching punch that punches the work plate during punching, and restrains it. For a punch without punching, there has been proposed a punching punching device characterized by a retainer that is retracted from its rear end portion to be in an unrestrained state and a linear moving device that moves the retainer.

  Further, in Patent Document 3 (Japanese Patent Application Laid-Open No. 9-239594), when performing a forming process on a workpiece, the punch moving body is subjected to punching conditions so as not to damage the forming portion of the workpiece. A punch press has been proposed in which punch holders having different thicknesses are configured to be detachable and replaceable, and the die holder is configured to be detachable and replaceable with respect to the die moving body.

Japanese Patent Laid-Open No. 7-100555 JP-A-8-323695 Japanese Patent Laid-Open No. 9-239459

  As described above, various punching apparatuses capable of forming various shapes of punching patterns and punching apparatuses aimed at improving the production rate have been studied and proposed. And in patent document 3, it is also proposed not to damage the shaping | molding part of the workpiece | work which is a workpiece at the time of a shaping | molding process.

  However, the damage to the workpiece forming part studied in Patent Document 3 is damage when the workpiece passes between the punch and the die, and the punch formed in a pin shape hits during the forming process. The fact is that the damage caused by this has not been studied.

  That is, in many punching apparatuses, when punching a workpiece, the punch portion at the punching position is supported at its upper portion by the regulating means, and the punch portion not at the punching position is freely supported without being supported at the upper portion. It was configured not to punch the workpiece by being pushed up against the workpiece. Therefore, during punching operation or detachment operation after drilling, the punch part hangs down in the space along its height due to its own weight, and the lower end of the punch hits the workpiece to be conveyed. In some cases, the punch portion may leave a mark or scratch on the workpiece.

  Therefore, in the present invention, the punching device is devised so as to control the operation of the punch portion during the punching operation or the detaching operation after punching so that the punched portion does not cause a mark or a scratch on the workpiece to be conveyed. It is a first problem to provide the above.

  Moreover, when the punch part which is not in the punching position hits the workpiece and is pushed up as described above, the upper part of the punch part is exposed in the space and is not protected at all. For this reason, when an external force is applied due to impact at the time of punching or twisting of the apparatus, the upper part of the punch portion exposed in the space may be bent or damaged.

  Accordingly, a second object of the present invention is to provide a punching device devised so that the punch is not damaged or broken even if an extra external force is transmitted to the punch portion.

  In order to solve at least one of the above-described problems, the present invention includes a movable part that moves the punch part up and down by power while supporting the punch part.

  That is, in the present invention, a punching device for punching a sheet-like workpiece, which is formed in a pin shape, and a plurality of punch portions for punching the workpiece, and a lift that moves the punch portion up and down. And a die plate part having an opening part into which the lowered punch part is inserted, and has a movable part that supports the punch part and moves up and down relative to the lifting part. Providing equipment.

  Such a punching device of the present invention includes a movable part that supports the punch part and moves the punch part up and down relative to the lifting part. This movable part supports the punch part, and the movable part moves the punch part up and down relative to the lifting part, so that the punch that is not in the punching position can be intentionally (or forcibly) raised. As a result, of the plurality of punch portions, the punch portion that is not punched does not hit the workpiece, and the workpiece to which the punch portion is conveyed is not marked or scratched. In particular, if the workpiece is a material that is easily damaged, such as plastic, or a soft material, such as leather, a dent may occur even if the punch hits itself due to its own weight. Therefore, a more remarkable effect can be obtained for a workpiece made of these materials.

  The sheet-like workpiece refers to a member perforated at a predetermined position by the apparatus, and a member formed into a sheet shape or a plate shape with various materials such as metal, resin, wood, leather or cloth. Broadly mean. For example, leather, synthetic resin or fabric used for seats that are automobile interior materials, non-woven fabric and wallpaper used as indoor building materials, and polyester, synthetic leather, and other industrial materials used in the clothing field It means a member formed of various materials such as PET, polyethylene, EVA film, aluminum, and urethane foam. In the punching apparatus according to the present invention, the possibility of scratches and scratches on the punched portion being reduced as much as possible on the workpiece to be conveyed can be reduced as much as possible, so there is a high possibility that fine scratches will hinder product functions. It can also be used effectively for members used in precision instruments and the like.

  The punch portion is formed in a long pin shape, and is an element for punching the workpiece. The punch portion is pin-shaped and can be formed in combination. Each punch portion can be formed in various shapes such as a circular shape, a square shape, a polygonal shape in cross section, and the plurality of punch portions can be appropriately arranged in consideration of a target perforation pattern. . Then, by moving the punch portion up and down, the workpiece can be perforated, and holes arranged in various patterns such as target characters and design patterns can be formed.

  The sheet-like workpiece is placed on the die plate portion and perforated. That is, the die plate part supports a workpiece to be drilled and plays a role of receiving an insertion operation of the punch part. In order to receive the punching insertion operation, the die plate portion is provided with an opening corresponding to the punching portion so as to face the punching portion. The workpiece can be drilled. After the drilling, the workpieces are sequentially conveyed in order to drill a hole at the next drilling position. Therefore, it is desirable that the punching apparatus includes a conveying means for automatically conveying the workpiece.

  Here, the punching apparatus according to the present invention is provided with an elevating part that moves the punch part up and down, and supports the respective punch parts on the upper part of the elevating part and moves up and down with respect to the elevating part. It has a movable part to make it. That is, in a state where the punch portion is supported by the movable portion, the punch portion can be moved up and down by interlocking the movable portion and the elevating portion.

  As a specific operation, the punch part existing at the position where the hole is to be drilled lowers the punch part by the operation of the movable part to project from the lower surface of the lifting part, and further lowers the punch part by the lowering action of the lifting part. By doing so, the workpiece can be punched, and in the case of detachment after drilling, the elevating part can be raised and the punch part can be detached from the workpiece. On the other hand, the punch part which exists in the position which does not pierce | pierce is made into the state which does not protrude from the lower surface of an raising / lowering part by making it exist in the position which raised the punch part by the movable part. Even if the elevating part is lowered in this state, the lower end of the punch part does not protrude from the lower surface of the elevating part. Absent. However, it is desirable that the lower end of the punch portion be flush with the opening of a hole that moves up and down (a hole through which the punch portion provided in the punch holder passes). This is to eliminate the possibility that the work piece enters the hole and the pressing die is attached. In this way, by lifting and supporting the punch portion that exists at a position where no hole is formed in the perforation pattern, the punch portion is dropped by its own weight, and the possibility of hitting a workpiece and leaving a mark or scratch is eliminated. Whether or not the hole is to be drilled is designated by a control device such as a computer in accordance with the pattern to be formed.

  In the above description, the mechanism in which the elevating unit and the movable unit operate separately has been described. However, when the punch unit is moved up and down (up and down movement), both may be operated simultaneously. That is, at the time of drilling, the punch part is lowered by the operation of the movable part, and at the same time, the elevating part is lowered at the same time, so that the workpiece can be punched. On the other hand, the punch portion that does not perform the punching operation may be configured such that the movable portion operates together with the lifting portion to raise the punch portion.

  The movable portion is formed with a mechanism and a structure that supports the punch portion and moves the movable portion up and down relative to the lift portion. For this reason, various mechanisms such as a hydraulic mechanism, a link mechanism including a lever / crank, and a spring mechanism can be used as the mechanism for moving up and down. However, if stable operation and installation space are taken into consideration, a link mechanism such as a lever / crank. Is desirable. Further, in the link mechanism, the center of the lower surface in the length direction is formed in a convex shape, and the lift piece swings on the principle of the first lever with the flange as a fulcrum, and the upper surface of the lift piece, straddling the fulcrum It can be formed from a sliding piece that slides. When forming as described above, it is desirable that the punch portion is provided on the side of the lift point (tip side). That is, by sliding the slide piece back and forth around the fulcrum, the lift piece can be swung by the principle of the first lever, and the punch portion provided on the action point side can move up and down. In addition, it can also be configured using a four-bar linkage mechanism or the like, and a punch portion can be provided in a contact or link that moves up and down.

  The power configuration for sliding the slide piece back and forth as described above is not particularly limited. For example, a hydraulic or pneumatic cylinder can be used as a power source. By providing the lift piece and the slide piece as described above to form the movable part, the power required for moving the punch part up and down is relatively small. This is because the lift piece is swung by the slide movement of the slide piece, and the punch part is moved up and down by the movement of the lift piece, so the slide piece is slid back and forth rather than the power to move the punch part up and down as it is. This is because it requires less power to make it happen. According to the above configuration, since the power burden on the entire apparatus is reduced, the life of the apparatus can be expected to be extended. In addition, the power structure is not limited to a reciprocating power mechanism, and a rotating mechanism such as a rotating disk is used, and the movable part may be configured by a mechanism (such as a link mechanism) that converts this into a vertical motion. it can.

  In addition, when the lift piece is swung by the action of the first lever as described above, it is desirable that the punch portion is held on the upper end portion on the action point side of the lift piece. This is to prevent the punch portion from falling due to its own weight. Therefore, when the lift piece swings and the punch part is lifted, the punch part attached to the upper end part of the lift piece does not fall by its own weight, and leaves a mark or scratch on the workpiece. Fear can be eliminated.

  Here, the lift piece formed as described above forms a lower surface on the retreat side in the moving direction of the slide piece as an inclined surface inclined in a wedge shape, and the inclined piece has an inclined surface on an installation portion of the lift piece in the elevating unit. It is desirable to form an inclined receiving surface with a smaller inclination angle. This can realize the swing of the lift piece by forming the inclination angle of the receiving surface smaller than the inclined surface, and the punch portion can be moved up and down reliably by the swing operation. Further, by tilting the receiving surface, it is possible to prevent the lift piece from moving backward due to frictional resistance or the like when the slide piece is retracted.

  Furthermore, it is more preferable that a convex portion projecting downward is formed on the retracted side of the lift piece in the slide movement direction, and a concave portion for receiving the convex portion is formed on the lift piece installation portion in the elevating portion. This is because when the punch part is raised by the operation of the movable part, the slide piece slides on the upper surface of the lift piece and the lift piece swings to raise the punch part, but the convex part and the concave part are engaged with each other. This is to apply a pawl to the swinging operation. By applying a pawl to the swing movement of the lift piece, the lift piece does not swing more than necessary, and the punch portion is prevented from rising excessively. Also, if the punch part is prevented from rising further and the lower end of the punch part is flush with the opening of the hole that moves up and down (the hole through which the punch part provided in the punch holder passes), etc. It is possible to reduce as much as possible the work piece entering the mold and sticking the die. Further, by engaging the convex part of the lift piece and the concave part of the lift part, the lift piece and the lift part are reliably positioned, and even if the slide piece slides on the lift piece, the slide piece Can be prevented from sliding on the lift.

In addition, even if the movable part is formed by forming the lift piece in a substantially semicircular arc shape instead of the wedge shape and forming the lower end of the slide piece in an arc shape, the same effect as described above can be obtained. . That is, the movable part can be formed in various shapes as long as it has a function of supporting the punch part and moving up and down with respect to the lifting part. However, it is desirable that the shape of the lift piece is determined by considering the type of workpiece to be drilled, the shape to be drilled, the shape (thickness, material, etc.) of the punch portion, the vertical movement distance, etc. Even in such a case, it is desirable that at least the punch portion is exposed in the space and an extra external force is not transmitted, so that the power load of the entire apparatus is reduced as much as possible.

  The punching apparatus according to the present invention includes a movable portion that supports the punch portion and moves the punch portion up and down relative to the lifting portion. The movable part supports the punch part, and the movable part moves the punch part up and down with respect to the lifting part, so that the punch part not at the punching position can be intentionally (or forcibly) raised. . As a result, of the plurality of punch portions, the punch portion that is not punched does not hit the workpiece, and the workpiece to which the punch portion is conveyed is not marked or scratched.

  In addition, since the punch portion is effectively supported by the movable portion, the upper portion of the punch portion is not exposed to the space even when the punch portion that is not in the punching position hits the workpiece. . Therefore, an extra external force is not transmitted to the punch portion, and the possibility that the punch portion is broken or damaged can be reduced as much as possible.

Further, when the movable part is formed by a link mechanism composed of a lift piece and a slide piece, the punch piece can be moved up and down by swinging the lift piece by the sliding movement of the slide piece. Since only a small amount of power is required to move the device up and down, the power load on the entire device can be suppressed, and the life of the device can be extended.

BRIEF DESCRIPTION OF THE DRAWINGS It is the principal part longitudinal cross-sectional schematic which shows the mode at the time of the punching of the punching apparatus concerning this Embodiment, (A) The principal part longitudinal cross-sectional schematic of a punching apparatus, (B) The principal part longitudinal cross-section schematic which shows the component of a movable part. It is. It is a principal part longitudinal cross-sectional schematic diagram which shows the mode at the time of the non-drilling | punching of the punching apparatus concerning this Embodiment (the punch part which exists in the position which pierces a hole). It is a principal part longitudinal cross-sectional schematic diagram which shows the aspect at the time of the non-drilling of the punching apparatus concerning this Embodiment (the punch part which exists in the position which does not drill a hole). It is some Example of the lift piece and slide piece which are the components of a movable part, (A) 1st Example, (B) 2nd Example, (C) 3rd Example.

  Hereinafter, the punching apparatus according to the present embodiment will be described in detail with reference to the drawings. FIG. 1 is a schematic vertical sectional view showing a main part of a punching apparatus according to an embodiment of the present invention during drilling, (A) a schematic vertical sectional view of the main part of the punching apparatus, and (B) a main part showing components of the movable part. FIG. 2 is a schematic vertical cross-sectional view, FIG. 2 is a schematic vertical cross-sectional view showing the main part of the punching apparatus according to the present embodiment at the time of punching (a punch portion existing at a position where a hole is drilled), and FIG. It is a principal part longitudinal cross-section schematic diagram which shows the aspect at the time of the non-drilling of the punching apparatus concerning (a punch part which exists in the position which does not puncture a hole).

  A punching device P according to the present embodiment shown in FIGS. 1 to 3 includes a plurality of punch portions 10 formed in a pin shape for punching a sheet-like workpiece H, a die set 11 serving as an upper die, and It comprises a backing plate 12, a die plate part 20 as a lower mold, and an elevating part 30 for moving the punch part 10 up and down while being sandwiched between an upper mold and a lower mold.

  The die plate portion 20 includes a die plate 21 and a backing plate 22 each having an opening 23 into which the lowered punch portion 10 is inserted. The die plate portion 20 supports the workpiece H to be punched and inserts the punch portion 10. The role to receive. The workpiece H is supplied (conveyed) into a space formed between the die plate part 20 and the elevating part 30 and punched.

  The elevating unit 30 holds the punch unit 10 and is capable of coming into contact with and detachable from a movable unit 40 described later, and a stripper plate 33 attached to the punch holder 31 via a spring 32. Consists of. Further, a guide pin (not shown) is fitted between the die plate part 20 and the lifting part 30 and guides the lifting part 30 to the die plate part 20 so as to be movable up and down.

  Here, the punching apparatus P according to the present embodiment is configured to include the movable unit 40 that supports the punch unit 10 and moves the elevator unit 30 up and down. As shown in FIGS. 1 (A) and 1 (B), the movable part 40 includes a slide piece 41 having a substantially triangular lower end and a fulcrum F placed between a force point E and an action point L. The lift piece 42 includes a single lever-like lift piece 42 and a receiving piece 43 that exists under the lift piece 42 and receives the swinging motion of the lift piece 42. A pneumatic cylinder 46 is used as a power source for the slide piece 41, and the power of the pneumatic cylinder 46 is transmitted to the slide piece 41 via the cylinder shaft 45 to move the slide piece 41 back and forth. It is set as the structure made to slide to.

  Further, the punch unit 10 is provided on the side of the action point existing on the tip side of the lift piece 42, and the upper end of the punch unit 10 and the upper end of the lift piece 42 are held by the holding unit 44. And the said lift piece 42 rocks | fluctuates when the slide piece 41 slides back and forth on the upper surface of the said lift piece 42, and can move the punch part 10 provided in the action point L side up and down. That is, the punch unit 10 that moves up and down by the swinging motion of the lift piece 42 moves up and down while being supported by the holding unit 44, so that it does not fall by its own weight, and the workpiece H is not damaged. The risk of attaching is eliminated.

  Further, the lift piece 42 has a lower surface on the retreat side in the slide movement direction formed as an inclined surface 421 inclined like a wedge, and the installation portion 431 of the lift piece 42 in the receiving piece 43 is inclined more than the inclined surface 421. The receiving surface 432 is formed with a reduced height. This is because the lift piece 42 is reliably swung in the form of a first insulator, and the swinging motion is reliably transmitted to the up and down motion of the punch portion 10.

  A convex portion 422 that protrudes downward is formed on the backward side of the lift piece 42 in the sliding movement direction, and a concave portion 433 that receives the convex portion 422 is formed in the installation portion 431 of the receiving piece 43. . This is because when the punch unit 10 is raised by the operation of the movable unit 40, the slide piece 41 slides on the upper surface of the lift piece 42 and the lift piece 42 swings to raise the punch unit 10. This is because the engagement between the portion 422 and the concave portion 433 makes it possible to stop the swinging operation. By applying a pawl to the swinging motion of the lift piece 42, the lift piece 42 does not swing more than necessary, and the punch portion 10 is prevented from rising excessively.

  Here, the operation of the punching apparatus P according to the present embodiment will be described in order. First, during the drilling operation, power for sliding the slide piece 41 by the pneumatic cylinder 46 works, and the slide piece 41 slides forward on the upper surface of the lift piece 42. By the sliding, the lift piece 42 swings and the punch portion 10 is lowered. Further, the power for lowering the lifting / lowering unit 30 through the upper die set 11 and the backing plate 12 acts, and the punch holder 31 is pressed against the stripper plate 33 against the urging force of the spring 32, and the stripper plate The punch part 10 descend | falls by descending with 33, and can make a hole with respect to the workpiece H (refer FIG. 1 (A)).

  On the other hand, as shown in FIG. 2, at the time of non-drilling (that is, at the time of detachment operation), first, the power to be lifted through the upper die set 11 and the backing plate 12 works to push the punch holder 31 against the punch holder 31. The pressure is released, and the punch holder 31 is separated from the stripper plate 33 by the biasing force of the spring 32 and retracts upward together with the punch portion 10. At that time, the punch portion 10 present at the position where the hole is formed is in a state of protruding from the lower surface of the elevating portion 30.

  On the other hand, as shown in FIG. 3, the punch portion 10 existing at a position where no hole is formed can be present at a position where the punch portion 10 is raised by the movable portion 40, and protrudes from the lower surface of the elevating portion 30. It can be in a state that does not. That is, by not projecting the lower end of the punch part 10 from the lower surface of the elevating part 30, even if the elevating part 30 is lowered in this state, no hole is formed in the workpiece H. Further, the lower end of the punch portion 10 raised by the movable portion 40 is configured to be flush with the opening of a vertically moving hole (a hole through which the punch portion 10 provided in the punch holder 31 passes). Therefore, even if the raising / lowering part 30 is lowered, the possibility that the workpiece H enters the hole and the push die is attached is eliminated.

  In particular, in the present embodiment, since the punch portion 10 is supported by the holding portion 44 of the lift portion 42, when the punch portion 10 is lifted by the movable portion 40, the punch portion 10 is reliably removed from the workpiece H. Can be evacuated. Therefore, even when the punch part 10 is raised by the movable part 40, the danger that the punch part 10 falls due to its own weight can be avoided, and the workpiece H is configured not to have a mark or scratch on the lower end of the punch part 10. .

  In the present embodiment, the mechanism in which the elevating unit 30 and the movable unit 40 operate separately has been described. However, when the punch unit 10 is moved up and down (up and down), both are operated simultaneously. May be. That is, at the time of drilling, the punch unit 10 is lowered by the operation of the movable unit, and at the same time, the elevating unit 30 is also lowered, so that the workpiece H can be drilled. On the other hand, the punch unit 10 that does not perform the punching operation may be configured such that the movable unit 40 operates together with the lifting unit 30 to raise the punch unit 10.

  Here, the lift piece 42 and the slide piece 41, which are constituent elements of the movable part 40, may support the punch part 10 and have a function of moving up and down with respect to the lifting part 30. Can be formed. Therefore, some examples of the lift piece 42 and the slide piece 41 are shown in FIG.

  For example, as shown in FIG. 4A (similar to the shape according to the present embodiment), the lower end of the slide piece 40A is formed in a substantially triangular shape, and the lift piece 42A is formed in a wedge-shaped first lever shape. Can do.

  Further, as shown in FIG. 4B, the lower end of the slide piece 41B is formed in an arc shape, and in the lift piece 42B, the sliding surface on which the slide piece 41B slides and the portion on the fulcrum F are formed in an arc shape. It can also be formed. That is, in forming the sliding part of the slide piece 41B and the lift piece 42B, the possibility of wear and damage of both is reduced by eliminating the corner (providing roundness).

  In addition, as shown in FIG. 4C, the lift piece 42C can be formed in the same shape as the lift piece 42A in FIG. 4A, and the slide piece 41C can be formed with a small diameter. This is effective when the punching device main body is formed small and it is desired that the component parts are also formed small.

  In addition to the above, the slide piece and the lift piece can be formed in other shapes such as a square shape, but in view of the type and purpose of the work piece to be drilled, the shape (thickness, It is desirable to consider the material and the vertical movement distance.

Further, since the movable portion 40 is formed with a mechanism and a structure that supports the punch portion 10 and moves up and down with respect to the elevating portion 30, the mechanism that moves up and down includes a hydraulic mechanism, an insulator and a crank. Various link mechanisms, spring mechanisms and the like can be used. In addition, it can be configured by using a four-bar linkage mechanism or the like, and the punch portion 10 can be provided at a position in which it moves up and down. That is, it can be appropriately modified and formed without departing from the spirit of the invention.

P punching device H work piece E force point F fulcrum L action point 10 punch part 11 die set 12, 22 backing plate 20 die plate part 21 die plate 23 opening part 30 lift part 31 punch holder 32 spring 33 stripper plate 40 movable part 41 , 41A, 41B, 41C Slide piece 42, 42A, 42B, 43C Lift piece 421 Inclined surface 422 Convex part 43 Receiving piece 431 Installation part 432 Receiving surface 433 Recessed part 44 Holding part 45 Cylinder shaft 46 Cylinder

Claims (5)

A punching device for perforating a sheet-like workpiece,
A plurality of punch portions that are formed in a pin shape and pierce the workpiece;
It consists of a lifting part that moves the punch part up and down and a die plate part that has an opening into which the lowered punch part is inserted,
While supporting the punch part, it has a movable part that moves up and down relative to the lifting part ,
The movable part is formed with a first lever-like lift piece having a fulcrum between the force point and the action point, and a slide piece sliding on the upper surface of the lift piece,
The punch portion is provided on the action point side of the lift piece,
The slide piece is an upper surface of the lift piece, and when the slide piece slides across the fulcrum, the lift piece swings, and the punch portion provided on the action point side moves up and down. apparatus.
2. The punching device according to claim 1, wherein the lift piece lifts and supports a punch portion that exists at a position where no hole is formed in the pattern to be punched, and prevents the punch portion from falling due to its own weight .
The punch portions present at a position not perforated in a pattern of perforations is present at a position raised by the movable part does not protrude from the lower surface of the lifting portion, the punching device according to claim 1 or 2.
In the lift piece, the lower surface on the retreating side in the slide movement direction is formed as an inclined surface inclined like a wedge, and the receiving surface of the lift part in which the lift piece is installed has a smaller inclination angle than the inclined surface. The punching device according to claim 2 or 3, wherein: is formed.
A convex part projecting downward is formed on the retreat side of the slide movement direction of the lift piece,
The punching device according to claim 4, wherein a recessed portion for receiving the convex portion is formed in a portion where the lift piece is installed in the elevating portion.