JP3027398U - Cushion material for paper machine punching device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To improve punching-out performance of punching scraps by a cushion material. SOLUTION: This is a cushion material used in a flat-plate type paper container punching device composed of an upper and lower punching die or a rotary type paper container punching device consisting of a die cylinder and an anvil cylinder, and the punching material 5 is fixed to a projecting member. Elastic material 11 made of hard sponge or foamed urethane, and a surface material 12 made of a harder material than the elastic material made of candy rubber, resin or metal plate fixed to the tip end surface of the elastic material. The surface material and the surface material are integrated with an adhesive, and the surface of the surface material that comes into contact with the punching sheet is provided with projections and depressions and concave portions, and the elastic material extends from the surface material fixing surface to the vicinity of the facing surface. 13 are formed at intervals, these grooves are opened in the peripheral surface of the elastic material, and at least the height of the surface material is projected to the material sheet side from the punched material. With this, punching scraps are ejected at a number of places to get out.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cushion material for a paper punching device, and more specifically, it is used for a flat paper punching device consisting of a vertical punching die or a rotary paper punching device consisting of a die cylinder and an anvil cylinder. The present invention relates to a cushioning material that presses a material sheet against an opposing mold surface when punching with a punching material and ejects punching scraps after punching.

[0002]

[Prior art]

 Conventionally, in a flat-plate type paper container punching device composed of an upper and lower punching die, as shown in FIG. 7, a material sheet S made of cardboard paper or the like is placed on the upper surface of a fixed lower punching die substrate 1 and arranged above. The upper die-cutting substrate 3 is descended, and the punching material 5 protruding from the lower surface of the substrate 3 knocks out the punching scraps 4 along the punching line L previously formed on the material sheet S, The die-cut product 7 is formed. A cushion material 6 made of sponge or the like is fixed to the substrate 3 so as to project in the same direction as the punched material 5 protruding downward. When the material sheet S is punched out, the cushion material 6 presses against the surface of the material sheet S to elastically position and hold the material sheet S. It is designed to have the effect of pushing out punched chips.

In the rotary type paper container punching device, as shown in FIG. 8, the material sheet S is fed between the die cylinder 8 and the anle cylinder 9 which rotate in opposite directions, and the material sheet S is projected on the outer peripheral surface of the die cylinder 8. The punching material 5 punches out the material sheet, and after punching, the cylinder rotates to elastically restore the cushioning material 6 attached to the outer peripheral surface of the die cylinder 8, and the punching scraps are repelled by the repulsive force. I'm trying to stick it out.

[0004]

[Problems to be solved by the device]

 In both the flat plate type and the rotary type, if the resilience performance of the cushioning material 6 is inferior, the action of releasing the punching chips is reduced, and as a result, the punching chips do not come out during the punching work and It is easy to get out of the work process. Therefore, it is preferable that the cushioning material 6 has a large resilience performance, a hard contact surface with the material sheet, and good slipperiness. However, if the entire cushion material is made of a material that is hard and has high resilience, the cushion material does not easily compress when pressing the material sheet, and a large pressing force is required, resulting in poor workability. Further, when the material sheet has irregularities, it becomes difficult to absorb the irregularities and apply a pressing force uniformly.

Therefore, as a material that is moderately flexible and easy to compress, does not require a large pressing force, and can easily absorb the unevenness of the material sheet, the sponge described in the conventional example has a flexible and large elastic modulus. It is used. However, in the case of a sponge, there is a drawback in that the resilience performance of elastically returning after punching and ejecting punched chips is low.

In order to solve the above-mentioned problem, the applicant of the present invention has previously disclosed a cushion material in which a hard rubber 19 is adhered to the surface of a sponge or urethane foam 18 as shown in FIG. 9 in Japanese Patent Application Laid-Open No. 7-68498. providing. Since this cushion material has hard rubber attached to the surface, it has abrasion resistance and can reduce the occurrence of damage or uneven wear on the surface that is pressed against the material sheet. Moreover, by simply sticking a hard rubber on the surface, sponge made of sponge or the like and having a large elastic modulus are mainly used, or urethane foam. There are good advantages.

However, in all of the conventional cushioning materials shown in FIGS. 7 and 8 and FIG. 9, since the contact surface with the material sheet is flat, adhesive rubber, adsorbent sponge, etc. When the material sheet is punched with the material sheet pressed, the punched chips are likely to stick and stick to the flat plate-shaped contact surface of the cushion material. In that case, even if the cushion material returns elastically, the punching scraps remain attached to the surface of the cushioning material, and the punching scraps cannot be ejected during punching. As a result, the timing at which the punching dust is ejected from the surface of the cushioning material becomes random, resulting in poor workability and in some cases the work must be stopped.

Particularly, the punching scraps of a relatively small area surrounded by the punching materials are likely to be fitted into the inside of the punching materials, and the punching wastes are reliably removed during the punching. It's not easy. Conventionally, the above cushion material is attached to the part surrounded by this punching material so that the punching dust is ejected by the repulsive force due to the elastic return of the cushion material, but the surface of the cushion material is flat and Since it has adhesiveness or adsorptivity, there was a problem that the punching scraps could not be easily removed.

The present invention solves the above-mentioned problems and provides a cushioning material that has a function of reliably ejecting punching scraps and releasing it, and at the time of punching, compresses a material sheet to give a required pressing proximity. It is intended to be provided.

[0010]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a cushion material for use in a flat plate type paper punching device comprising upper and lower punching molds according to claim 1, wherein the cushioning material is a hard sponge or a foam which is fixed to the punching mold that projects. It consists of an elastic material made of urethane and a surface material harder than the elastic material such as a candy rubber, a resin or a metal plate fixed to the protruding end surface of the elastic material. The elastic material and the surface material are bonded together by an adhesive. The surface of the surface material that comes into contact with the punched sheet is provided with irregularities consisting of protrusions and recesses, and the elastic material is formed with grooves extending from the surface material fixing surface to the vicinity of the facing surface at intervals. The cushioning material for the paper punching device is characterized in that these grooves are opened on the peripheral surface of the elastic material, and at least the surface material is set to have a height protruding toward the material sheet side from the punching material. Provide There.

More specifically, in the above-mentioned flat plate type paper container punching device, the upper and lower punching molds are separated from each other, and, for example, a punching material protruding downward from the upper punching mold substrate is a material placed on the lower punching mold substrate. The sheet is designed so that the punching chips are dropped along the preformed punching line. The cushion material is attached to the lower surface of the upper punching board so as to project downward in the same direction as the punching material. When the upper punching type base plate attached with this cushion material is lowered, first, the material sheet is pressed against the lower punching type substrate by the projections of the cushioning material, and further the substrate is lowered and the elastic material of the cushion material is compressed. , The material sheet is pressed against the lower die-cutting substrate with the required force. After punching the material sheet with the punching material in this state, the upper die is lifted and the cushion material is released from the pressure and elastically returns from the compressed state. The repulsive force due to the restoring force causes the punching scraps on the surface of the cushion material to be ejected, and the protrusions on the surface also eject the punching scraps at multiple points. In particular, since this protrusion is made of a hard material, it has a large thrusting force, and punching dust can be reliably removed from the cushion material when the cushion material elastically returns.

Further, the present invention provides a cushion material used in a rotary type paper punching device comprising a die cylinder and an anvil cylinder according to claim 2, which is projected on a die board attached to an outer peripheral surface of the die cylinder. It consists of an elastic material that is projected and fixed in the same direction as the punched material, and a surface rubber material that is harder than the elastic material made of resin rubber or a metal plate that adheres to the protruding end surface of the elastic material. The elastic material and the surface material are integrated by an adhesive, and the contact surface of the surface material with the punching sheet is provided with irregularities composed of protrusions and recesses. Grooves extending to the vicinity are formed at intervals, these grooves are opened on the peripheral surface of the elastic material, and at least the height of the surface material is set so as to protrude from the punched material to the material sheet side. Special We provide a punching device for paper containers.

In the above rotary type paper punching device, the die cylinder and the anvil cylinder having the punching material projected on the outer peripheral surface are rotated in opposite directions, and the material is fed between the die cylinder and the ambile cylinder. The sheet is punched along the punching line by causing the punching material to bite into the elastic body on the outer peripheral surface of the anvil cylinder. The cushion material is attached on the outer peripheral surface of the die cylinder on which the punching material is projected, along the punching material and in the portion surrounded by the punching material, and facing the punching material. After being punched by digging into the elastic body on the outer peripheral surface of the, the punched chips are ejected by the cushion material that elastically recovers by separating from the opposing elastic body due to rotation. When punching out punching dust with this cushion material, as in the case of the above flat plate type device, the punching dust is pushed out at multiple points by the protrusion on the surface of the cushion material, and since this protrusion is made of a hard material, it is pushed out. The force is large, and punching waste can be reliably removed from the cushion material when the cushion material elastically returns.

The above-mentioned candy rubber is made of a semi-vulcanized or unvulcanized rubber having a low degree of vulcanization, and is made of a natural rubber or a synthetic rubber giving a required hardness. In the case of a metal plate, aluminum is preferable.

The projections provided on the surface material are vertical and / or horizontal continuous streak projections, independent projections that are projected at regular intervals in the vertical and horizontal directions, and the tips of these projections are flat, acute-angled, Alternatively, an arc shape or the like is preferable. (Claim 3) When a resin material, a metal material, or the like is used as the surface material, it is preferable that the protrusion amount of the protrusions is reduced and the tip end surface that contacts the material sheet is a flat surface.

It is preferable that the groove provided in the elastic member is formed in a cross shape with the center of the elastic member as a fulcrum so as to be opened on the outer peripheral surface of the elastic member and communicate with each other. With this structure, if the air inside the groove is smoothly blown out and compressed evenly when the elastic material is compressed, the vertical middle portion is less likely to deform laterally when it is compressed, and it is straight. It can be compressed in the state, and the required pressing force can be uniformly applied to the material sheet. Further, the groove allows the elastic material to expand in the direction orthogonal to the compression direction and can be easily compressed.

[0017] Further, while making both side surfaces of the elastic material as smooth surfaces, the above surface material is adhered to one side surface with an adhesive, while release paper is adhered to the other side surface via the adhesive, The release paper is peeled off so that it can be easily fixed to a required portion of the substrate by an adhesive.

[0018]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. The same members as those in the conventional example shown in FIGS. 7 and 8 are designated by the same reference numerals and the description thereof will be omitted. 1 to 3 show a first embodiment applied to a flat paper punching device, and a cushion material 10 used in the paper punching device of the present invention is made of a hard sponge on the surface of an elastic material 11 made of hard sponge. The surface material 12 made of candy rubber having high hardness is adhered and formed by an adhesive. The cushion material 10 is adhered and fixed to a required position on the lower surface of the upper die-cutting substrate 3. That is, the cushion material 10 is arranged at a position along the outer shape of the punched product and along the punching material 5 to be formed and on the inner side of the punching material 5 for internal hollowing of the punched product. The tips (lower ends) of these cushion materials 10 are slightly projected from the tips of the punching material 5 protruding from the substrate 3.

As shown in FIGS. 2A and 2B, the elastic material 11 of the cushion material 10 has a rectangular cross section and has a thickness having a required height H1. The surface material 12 attached to the entire lower surface (upper surface in FIG. 2) of the elastic material 11 is thin, and the lattice-shaped projections 12b are provided on the lower surface of the flat plate portion 12a fixed to the elastic material 11 with an adhesive. The concave and convex portions 12c sandwiched by the projections 12b form irregularities on the material sheet contact surface of the surface material 12.

The height (wall thickness) H1 of the elastic member 11 is preferably in the range of 30 mm to 70 mm, and the height H2 of the surface material 12 at the position where the protrusion 12b is 1 mm to 6 mm and the protrusion amount of the protrusion 12b. H3 is preferably in the range of 0.5 mm to 4 mm. In this embodiment, the height H1 of the elastic material 11 is 50 mm, the height H2 of the surface material 12 is 1.5 mm, and the height H3 of the protrusion 12a is 1 mm.

Further, as shown in FIG. 2C, the elastic material 11 is provided with a cross-shaped groove 13 from a lower surface which is an adhesive surface to the surface material 12 to a vicinity of an upper surface which is fixed to the substrate 3. There is. The cross-shaped center of the groove 13 is located substantially at the center of the elastic member 11, and the four outer ends of the groove 13 are opened at the central portions of the front and rear and left and right outer surfaces of the elastic member 11.

It should be noted that the shape of the groove 13 is not limited, and may be the shape shown in FIGS. 3A, 3B, and 3C depending on the size and shape of the cushion material 10. In FIG. 3 (A), one groove 13a is provided in the major axis direction and two grooves 13b are provided in the minor axis direction perpendicular to the groove 13a in the elastic material 11 of the elliptical cushion material 10 at a required interval. The holes 13a and 13b are formed so as to communicate with each other. In FIG. 3B, the elastic material 11 of the rectangular cushion material 10 is provided with a plurality of grooves 13 in the direction orthogonal to the length direction with a required interval in the length direction. In FIG. 3C, the grooves 13 are individual holes that do not communicate with each other. Furthermore, the surface material 12 may be provided with a hole communicating with the groove 13 in the recess 12c.

A release paper 14 is adhered to the upper surface of the elastic material 11 via an adhesive, and the release paper 14 is removed and fixed to a required portion of the substrate 3 via the adhesive.

When the material sheet 2 is punched using the paper container punching device to which the cushion material 10 is attached, the upper punching substrate 3 is lowered as shown by the arrow in FIG. By this operation, first, the projection 12b of the surface material 12 of the cushion material 10 contacts the material sheet 2, and the material sheet 2 is pressed not partially on the upper surface of the material sheet 2 but on the lower punching die 1. At that time, since the protrusion 12b has hardness, the material sheet 2 is pressed with good adhesiveness, and even if the material sheet 2 is not smooth, the material sheet 2 is pressed flexibly by the protrusion 12b. You can Further, since the elastic material 11 is easier to compress than the surface material 12 and the groove 13 is provided, the elastic material 11 can easily expand in the lateral direction orthogonal to the compression direction, and the elastic material 11 itself is laterally expanded. The material sheet 2 can be pressed straight and pressed without causing a deviation in the direction.

In this state, the punching material 5 protruding from the substrate 3 hits the upper surface of the punching line L of the material sheet 2 in accordance with the lowering of the upper punching substrate 3, and the material sheet is cut along the punching line L. I'm going to beat T-2. At that time, as shown in FIG. 4, the elastic material 11 of the cushion material 10 presses the material sheet 2 while compressing it, and a uniform pressing force is applied to the material sheet 2. Punching can be done. By this punching, the punching scraps 4 of the material sheet 2 are blown off, and a punched product 7 having a required shape is formed.

After forming the die-cut product 7 by punching out the punching dust 4 as described above, the upper die-cutting substrate 3 is lifted up. At that time, the compressed cushion material 10 elastically returns to its original state, With the repulsive force generated by the elastic recovery, the punched product 7 that is sandwiched by the punching material 5 and tries to rise is set on the substrate 1 or is pushed down on the substrate 1.

When the cushion material 10 is used, since the surface material 12 having hardness is attached to the contact surface with the material sheet 2, wear due to contact with the material sheet 2 can be reduced. Further, since the surface material 12 is made of hard rubber, and the large number of protrusions 12b push the punching dust 4 at a large number of points, the punching dust 4 can be reliably ejected and detached.

The cushioning material of the present invention is not limited to the above-mentioned structure. For example, as shown in FIG. 5 (A), the protrusions 12b provided on the surface material 12 are line-shaped protrusions provided with a certain pitch in the lateral direction. It may be 12b. Further, the protrusions 12b continuous in a mountain shape shown in FIG. 5B and the protrusions 12b continuous in a wave shape shown in FIG. 5C may be used.

Further, in the above-mentioned embodiment, a rubber material similar to the elastic material 11 and having a high hardness is used as the surface material. However, a resin rubber or a metal plate may be used instead.

FIG. 6 shows a second embodiment of the present invention, which is applied to a rotary type paper container punching device. The cushion material 10 is fixed to the outer peripheral surface of the die board 20 attached to the outer peripheral surface of the die cylinder 8. In this embodiment, the cushion material 10 is located at the inner position surrounded by the punching material 5'for the rectangular internal hollow portion. 10 is attached.

The cushion material 10 is similar to the cushion material 10 of the first embodiment, and includes an elastic material 11 fixed to the die board 20 via an adhesive and a surface material 12 fixed to the surface thereof via the adhesive. The surface material 12 of this embodiment is a resin molded product. As the cushion material 10, the cushion material 10 having the shapes shown in FIGS. 5A, 5B, and 5C can naturally be applied to the rotary type paper container punching device.

The surface material 12 is provided with projections 12b at a constant pitch, and the recesses 12c between the projections 12b form irregularities on the end surface of the surface material 12. At the time of attachment to the die board 20, at least the surface material 12 is made to protrude from the tip of the punched material 5 ′ by a required size. Further, the elastic member 11 is provided with a cross-shaped groove (not shown) similar to that of the first embodiment.

The die cylinder 8 in which the cushion material 10 and the punching material 5 ′ are projected from the die board 20 is arranged so as to face the anvil cylinder and reversely rotated in the same manner as in the conventional example shown in FIG. The material sheet is sent to the die and punched along the punching line.

During the punching action of the material sheet, the cushion material 10 presses the material sheet against the surface of the elastic body attached to the outer peripheral surface of the anvil cylinder, and in this state, the material sheet is punched by the punching material 5 ′. Then, as the punching material 5'and the cushion material 10 are separated from the elastic body of the anvil cylinder by the rotation of both cylinders, the cushioning material 10 elastically returns and the punching material 5 is formed by the projections 12b of the hard surface material 12. Push out the punching scraps that are fitted inside the '. Therefore, the punching scraps are immediately and reliably removed after punching. In the second embodiment shown in FIG. 6, the die cylinder 8 is located below the anvil cylinder as in FIG. 8, but it goes without saying that the die cylinder 8 may be located above the anvil cylinder. Yes.

[0035]

[Effect of device]

 As is clear from the above description, the cushioning material according to the present invention is made of a hard surface material having a large number of protrusions on the contact surface with the material sheet that is likely to wear, and is fixed to the elastic material via the adhesive to form an integral body. When the cushion material elastically recovers after punching, the punching chips can be reliably ejected and removed from the material sheet, because the protrusions press against the material sheet in multiple points to push it out. In particular, it is easy to insert the punching chips between the punching materials, such as thin punching chips sandwiched between opposing punching materials and punching chips in the internal hollow part surrounded by the punching materials. In the portion where it is difficult to remove the punching dust, it is possible to reliably remove the punching dust.

Further, although a hard material such as rubber or resin is used as the surface material, an elastic material having a relatively good compressibility such as a hard sponge is used in the main part, so that the material sheet is used. The pressing force does not require so much pressing force, and it can be compressed smoothly. Moreover, since the elastic material is provided with the grooves, when the elastic material is compressed, it can be relatively easily expanded in the direction orthogonal to the compression direction, and the elastic material is compressed without causing lateral displacement or the like. Uniform pressing force can be applied to the material sheet.

Moreover, since a hard surface material is arranged on the surface that comes into contact with the material sheet, it is less likely to be damaged by the material sheet, has abrasion resistance, and improves the durability of the cushion material. You can Further, since the surface material is provided with irregularities and pressed by the protrusions, even if the surface of the material sheet has undulations, the material sheets can be pressed by the protrusions with good followability and a uniform pressing force can be applied.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a paper container punching device including a cushion material according to a first embodiment of the present invention.

FIG. 2A is a perspective view of the cushion material, and FIG.
FIG. 4A is a sectional view of FIG. 7A, and FIG. 6C is a perspective view showing an elastic material excluding a surface material.

3 (A), (B) and (C) are plan views showing modified examples of grooves provided in the elastic material.

FIG. 4 is a schematic cross-sectional view during a punching operation in the paper container punching device.

FIG. 5 shows a modified example of the cushioning material, (A) is a perspective view, and (B) and (C) are sectional views.

FIG. 6 is a partial perspective view of a paper container punching device including a cushioning material according to a second embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view of a plate type paper container punching device provided with a conventional cushion material.

FIG. 8 is a schematic cross-sectional view of a rotary type paper machine punching device provided with a conventional cushion material.

FIG. 9 is a perspective view showing another conventional cushioning material.

[Explanation of symbols]

 1, 3 Substrate 2 Material sheet 4 Punching waste 5 Punching material 7 Punching product 8 Die cylinder 9 Anvil cylinder 10 Cushion material 11 Elastic material 12 Surface material 12a Flat plate portion 12b Protrusion 12c Recess 13 Groove 14 Release paper 20 Die board

Claims (3)

[Scope of utility model registration request] 1. A cushion material used in a flat-plate type paper container punching device composed of an upper and lower punching die, which comprises an elastic material made of hard sponge or foaming urethane for fixing the punching material to the punching die projecting, and the elastic material It consists of a surface material of a material harder than the elastic material consisting of a rubber, a resin or a metal plate fixed to the tip end surface of the protruding side, and these elastic material and the surface material are integrated with an adhesive, and a punching sheet of the surface material and The contact surface is provided with projections and recesses, and the elastic material is formed with grooves extending from the surface material fixing surface to the vicinity of the opposing surface at intervals, and these grooves are opened on the peripheral surface of the elastic material. And, at least the surface material is set to have a height protruding toward the material sheet side from the punching material, and a cushioning material for a paper container punching device. 2. A cushion material used in a rotary type paper container punching apparatus comprising a die cylinder and an anvil cylinder, the cushion material being projected in the same direction as a punching material protruding from a die board attached to the outer peripheral surface of the die cylinder. And an elastic material that is fixed to the protruding end surface of the elastic material, and a surface material that is harder than the elastic material, such as a candy rubber, a resin, or a metal plate that is fixed to the protruding end surface of the elastic material. Integrally, the surface of the surface material contacting the punching sheet is provided with projections and recesses, and the elastic material is formed with a groove extending from the surface material fixing surface to the vicinity of the facing surface with a space, The cushion of the paper punching device is characterized in that these grooves are opened on the peripheral surface of the elastic material and at least the surface material is set to have a height protruding toward the material sheet side from the punching material. Wood. 3. The projections provided on the surface material are longitudinally and / or horizontally continuous streak-like projections, independent projections that are projected at regular intervals in the vertical and horizontal directions, and the tips of these projections are flat or acute-angled. The cushioning material of the paper punching device according to claim 1 or 2, which has an arc shape.