JP2002254396A - Punching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punching device capable of easily punching even a thick and hard material. SOLUTION: This device is provided with an upper die 1 fixing a cutting edge 5 so as to project the same and a lower die 3 opposing to the upper die 1 and keeping a designated gap with the upper die 1 to punch a product of a designated shape out from material to be punched. An insertion through hole 3b which the cutting edge 5 goes through is provided on the lower die 3. The lower die 3 and the upper die 1 are integrally retained with a connection member 2 in a condition that a tip 5b of the cutting edge 5 projects out from the insertion through hole 3b. The connection member 2 is made of elastic body and the gap is expandable. A cutting plate 4 opposing to the upper die 1 and the lower die 3 and provided with a groove part 6 having the cutting edge 5 inserted is included.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a punching device,
The present invention relates to an apparatus capable of easily punching an object to be punched into a predetermined shape by a mold having a cutting blade.

[0002]

2. Description of the Related Art Ordinary paper containers, cardboard, styrofoam, and the like are punched into a predetermined shape by a so-called wooden mold equipped with a cutting blade. FIG. 12 shows an example of a conventional wooden pattern. This is the cutting blade 100,
A flat die 101 such as plywood embedded with its tip protruding and a cutting plate 106 are combined, and for example, a sheet-like corrugated cardboard 102 is disposed between them, and the flat die 101 is cut into a cutting plate 1.
The cardboard 102 was cut by the cutting blade 100 by moving the cardboard 102 in the direction of arrow 06 (the direction of arrow A in the figure).
In this case, the end 10 of the cardboard 102 which is a sheet
3 is cut off to obtain a product having a predetermined shape.

In this case, the flat die 101 has a support pillar 104 inserted in a corner thereof, and a spring body 105 is wound around the support pillar 104, so that the flat die 101 can be moved vertically in the drawing. When the flat die 101 moves in the direction of arrow A, the spring body 105 contracts.
Due to the restoring force of the spring body 105, the flat die 101
Can be returned to the original position. Here, the spring body 105 is shown as an example of a mechanism for returning to the original position. However, in practice, in many cases, the flat die 101 is operated by using a crank mechanism and converting the rotation of a motor or the like into a reciprocating motion. .

According to such an apparatus, a large amount of corrugated cardboard having a predetermined shape can be continuously produced, and by assembling the corrugated cardboard, a corrugated cardboard box can be rapidly produced.

[0005] On the other hand, in order to protect products and the like stored in a cardboard box or the like, a cushion material is usually loaded in a gap between the cardboard box and the product or the like. For example, a foamed material which is lightweight and has a space capable of absorbing a force applied from the outside is used, but a foamed synthetic resin material represented by foamed styrene is often used.

However, in recent years, the problem of environmental pollution has been raised over the disposal of synthetic resins, and materials that are easy to dispose of after use and minimize environmental pollution have been desired. Has begun. One such material is paper, which is relatively easy to dispose of by incineration and has little risk of producing harmful gases or damaging the incinerator during incineration.

As an example of such a cushioning material, there is a cushioning material having a honeycomb structure as shown in FIG. 9 and having a surface as if it were a honeycomb.
It is formed by laminating thick paper so that a number of hexagonal spaces are arranged in parallel in the vertical direction on the surface of the thick paper.It is strong, strong, and lightweight, and is attracting attention as an alternative to foamable synthetic resin. I have.

[0008]

Since such a cushioning material is first formed in a relatively large sheet shape,
It is necessary to cut this into a predetermined size and supply it so as to match each usage mode.

[0009] However, this is not easy to cut as compared with foamable synthetic resin or the like because cardboard is continuous in many layers.

In the case where a step such as stepping is required on a part of the surface, a free shape can be easily obtained by using a synthetic resin with a mold. It is very difficult to perform processing that changes

In particular, since the cushion material is thick and hard, it cannot be punched out by a punching wooden mold having a cutting blade as described above, such as a sheet-like material such as corrugated cardboard. It was impossible to cut into various shapes.

Further, such a cushioning material can only be cut in a straight line even when a high-precision laser processing machine is used or cutting is performed by a cutter.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a punching device that can easily punch a thick hard material.

[0014]

Means for Solving the Problems The present invention has the following arrangement to solve the above-mentioned problems. That is, in order to punch out a product of a predetermined shape from a punched object, an upper die having a cutting blade fixed so as to protrude, and a lower die provided with a predetermined gap from the upper die facing the upper die. The lower die is provided with an insertion hole through which the cutting blade is inserted, and the lower die and the upper die are integrated with each other by a connecting member at a position where the cutting blade is in a state where the tip protrudes from the insertion hole. The connection member is held by the elastic member, is extendable and contractable so that the size of the gap changes, and has a cutting plate facing the upper mold and the lower mold.

It is necessary to use a cutting blade having sufficient pressure resistance so that a cutting blade having high resistance at the time of cutting can be cut. Therefore, the tip is serrated and the body is Hv
(Vickers) 300 or more, Hv600-660
It is preferable to use one having a high degree of hardness. The material of the cutting blade can be carbon steel or the like.

The upper mold and the lower mold can be connected while maintaining a predetermined gap by an elastic connecting material, and rubber, synthetic resin, or the like can be used for this connection.

Preferably, the cutting plate has a groove into which the tip of the cutting blade is inserted, and a contact surface of the groove with the cutting blade is formed of an elastic material.
This is because when the tip of the cutting blade abuts on the cutting plate, it is received by the elastic body to prevent damage to the cutting blade and to ensure punching.

Since the punching apparatus of the present invention has such a configuration, the object to be punched is arranged between the upper and lower dies and the cutting plate, and the upper and lower dies are moved toward the cutting plate. Then, the connecting member contracts and the cutting blade penetrates the punched object and reaches the cutting plate, so that the portion of the punched object surrounded by the cutting blade is punched. That is, during the above operation, a force is generated to crush the punched object between the upper die and the lower die and the cutting plate. However, since the punched object is not easily deformed, the lower die in contact with the punched object is generated. , A force acts to push it back in the upward die direction. Due to this stress, the coupling body contracts, and the gap between the lower mold and the upper mold is reduced,
The cutting blade is inserted into the punched object and cutting is performed.

A material that is not elastically deformed is loaded in a portion surrounded by the upper cutting blade, so that a punched object located inside the cutting blade can be crushed at the time of punching. Thereby, the product to be punched can be formed in a contracted state, and the stress generated in the crushing direction can be reduced.

Further, an inner blade is provided inside the cutting blade,
A material that is not elastically deformed is loaded inside the inner blade, and the punched object located inside the cutting blade is crushed at the time of punching, and a part of the punched object is cut, so that a step difference is generated in the punched object. Is formed. In this way, it is possible to process a product to be punched into a required predetermined shape.

According to such a punching device, a paper cushion material having a honeycomb structure, which has been difficult to cut, can be easily and quickly punched into an arbitrary shape and size.

By providing a structure for crushing the cushion material, it is possible to change the properties and shape of the product.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a punching device according to the present invention will be described in detail with reference to the drawings. (Embodiment 1) FIG. 1 is a partial side view of a punching apparatus according to the present invention, and shows an enlarged main portion. FIG. 2 is a side view schematically showing the whole of the apparatus. A lower mold 3 is attached to a lower surface 1a of an upper mold 1 made of plywood with a predetermined gap S therebetween via a plurality of rubber connecting bodies 2 provided at a predetermined interval. A cutting plate 4 is arranged further below the lower mold 3.

A groove 1b is formed at the center of the upper die 1, and a base 5a of a cutting blade 5 is buried and firmly fixed in the groove 1b, and the cutting blade 5 projects vertically from the lower surface 1a. ing. The cutting blade 5 has a flat plate shape and is continuously arranged in a frame shape so as to surround the punched portion according to the size of the object to be punched. Here, the cutting blade 5 is arranged in an annular shape.

As shown in FIG. 3, the cutting blade 5 has a saw-toothed tip, a hardness of Hv600, and is made of carbon steel. The angle α at the top is set to 90 degrees, and the cut angle θ at the tip of the cutting blade 5 is 24 degrees. However, the hardness, the material, and the shape of the cutting blade are, of course, not limited thereto.

On the other hand, an insertion hole 3b through which the cutting blade 5 is inserted is provided at a position corresponding to the cutting blade 5 in the lower die 3, and the tip of the cutting blade 5 further projects from the lower surface of the lower die 3. I have.

A groove 6 is provided on the cutting plate 4 at a position corresponding to the cutting blade 5, that is, on an extension line extending perpendicularly from the tip 5b of the cutting blade 5, and a synthetic resin 7 is provided in the groove 6. It is loaded.

On the lower surface of the lower mold 3, a rubber spacer 8 having a thickness greater than the protruding length La (FIG. 1) of the cutting blade 5 is provided.
The spacer 8 is disposed at a portion surrounded by the insertion hole 3 b through which the cutting blade 5 is inserted and at a side portion of the cutting blade 5.

The upper mold 1 and the lower mold 3 are integrally supported by a supporting device (not shown) so as to be movable in the direction of arrow A in FIG. 2, and are pushed downward in the direction of arrow A by a pressing device (not shown) to move downward. For example, it can be returned to the original position by a crank mechanism.

In order to fix the upper mold 1, the lower mold 3 and the cutting plate 4 at predetermined positions, a columnar member 10 is inserted through a through hole 9 provided in the upper mold 1, the lower mold 3 and the cutting plate 4. When the plates 4 are connected to each other, they are all set at predetermined positions (see FIG. 2). That is, if the columnar member 10 is penetrated through the through hole 9 to connect the upper mold 1, the lower mold 3 and the cutting plate 4, the alignment of these is completed, the cutting blade 5 is inserted through the insertion hole 3b, and is positioned at a predetermined position. The groove 6 is set on the extension of the tip 5b.

FIG. 7 shows the lower surface 3 a of the lower die 3, and through holes 9 are provided at four corners of the lower die 3. Also, since the cutting blade 5 is cylindrical and provided at a total of eight locations,
An annular insertion hole 3b is provided corresponding to this, and the tip 5b of the cutting blade 5 projects from each of these insertion holes 3b.

FIG. 8 is a plan view of the cutting plate 4, in which a fitting hole 11 of a columnar member 10 corresponding to the through hole 9 is provided, and an insertion portion 12 into which a tip 10a of the columnar member 10 is inserted is provided. I have. Also, the tip 5b of the cutting blade 5
The groove 6 into which is inserted is provided annularly at a position corresponding to these cutting blades 5.

The honeycomb structure 15 to be punched is
As shown in FIG. 2, the cushioning material 15 provided with a
It is arranged at a predetermined position above. At this time, the cushion material 15 is guided to a predetermined position by the sheet positioning member 13 provided at the end of the cutting plate 4.

Next, as shown in FIG. 4, when the upper mold 1 and the lower mold 3 which are integrated with each other move in the direction of the cutting plate 4, the cushioning material 15 moves the lower mold 3 against the arrow B.
Push up in the direction. At this time, the cutting blade 4 does not initially contact the cushion material 15 due to the presence of the spacer 8.
When the gap between the upper mold 1 and the lower mold 3 is further reduced, the rubber connecting member 2 contracts, and the lower mold 3 moves further in the direction of the upper mold 1. Then, the cutting blade 5 comes into contact with the cushion material 15, bites into the inside thereof, and furthermore, the cutting blade 5 penetrates deeply into the cushion material 15 as the connecting body 2 contracts. In this manner, the cushion material 15 is cut, and a product 25 having a predetermined shape can be punched from the sheet-like cushion material 15. (Embodiment 2) FIG. 5 is a side view of another punching device of the present invention, showing only the periphery of a cutting blade 5. As shown in FIG. A lower die 3 is attached to a lower surface 1a of an upper die 1 formed of plywood, and a cutting plate 4 is disposed further below the lower die 3. These components are different from those of the first embodiment. The same is true.

Further, on a lower surface portion of the upper die 1 surrounded by the cutting blade 5, a cushion material compressing portion 16 which is obtained by superposing and bonding plywood is provided. The lower end of the cushion material compression section 16 is located slightly above the tip 5b of the cutting blade 5 in the drawing. In addition, an inner blade 18 is provided on a peripheral edge of a lower end portion of the cushion material compression section 16. The inner blade 18 is arranged concentrically with respect to the cutting blade 5, but its tip is located above the cutting blade 5.

The inner mold 17 is located at a position above the lower mold 3 in a portion surrounded by the cutting blade 5 and outside the inner cutter 18, that is, between the cutting blade 5 and the cushion material compression section 16. The inner die 17 is provided to the upper die 1 and is connected to the upper die 1 via a rubber-made connecting body 2 which can be expanded and contracted.

Here, the other configuration is the same as that of the device described in the first embodiment, and thus the description is omitted.

In the second embodiment, when the cushion material 15 is punched by the cutting blade 5, as shown in FIG.
Compressed. In addition, a part of the inner blade 18 is cut by cutting into the outer periphery of the compressed part.

Therefore, the object 26 to be punched is shown in FIG.
Although it has a cylindrical shape as in FIG. 1, a step 27 is formed on the upper surface thereof, and the center is a concave portion 28. In this way, it is possible to punch the object 26 into a shape required as a cushion material.

Although the example in which the inner blade 18 is provided is shown here,
It is also possible to provide only the cushion material compression section 16 without providing this. In this case, the cushion material compression section 16 is loaded on the entire inside of the cutting blade 2 so that the entire punched object to be punched is compressed. In this way, the cushioning material in which the stress in the crushing direction is reduced is obtained by crushing the hard cardboard wall portion of the cushioning material.

The material to be punched is not limited to a honeycomb-shaped cushion material, but can be applied to various sheet-like materials having a relatively large thickness.

[0042]

As described above, according to the punching device of the present invention, it is possible to easily punch a hard cushion material or the like into a desired shape, and the surface of the object to be punched is changed. It can be formed as follows. Therefore, it is possible to mass-produce various types of punched objects made of materials that can be easily disposed of.

[Brief description of the drawings]

FIG. 1 is a side view showing a main part of a punching device of the present invention.

FIG. 2 is a side view schematically showing a punching device according to the present invention.

3A and 3B show examples of a cutting blade, wherein FIG. 3A is a front view and FIG. 3B is a side view.

FIG. 4 is a view showing a state where a cushion material is punched out by a cutting blade.

FIG. 5 is a view showing another embodiment of a portion provided with a cutting blade.

FIG. 6 is a diagram showing a state where a cushion material is punched out according to another embodiment.

FIG. 7 is a diagram showing a lower surface of a lower mold.

FIG. 8 is a plan view of a cutting plate.

FIG. 9 is a perspective view showing a cushion material having a honeycomb structure.

FIG. 10 is a perspective view of an object to be punched (product) by the apparatus according to the first embodiment.

FIG. 11 is a perspective view of an object to be punched (product) by the apparatus according to the second embodiment.

FIG. 12 is a view showing an example of a conventional sheet-like material punching apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper mold 2 Connected body 3 Lower mold 4 Cutting plate 5 Cutting blade 6 Groove 8 Spacer 15 Cushion material

Claims (6)

[Claims] 1. An upper die having a cutting blade fixed so as to protrude therefrom, and a lower die provided at a predetermined gap from the upper die facing the upper die in order to punch a product having a predetermined shape from an object to be punched. The lower die is provided with an insertion hole through which the cutting blade is inserted, and the lower die and the upper die are connected to each other by a connecting member at a position where the cutting blade projects from the insertion hole. Are held integrally with each other, the connecting member is formed of an elastic body, is extendable and contractable so that the size of the gap changes, and a cutting plate facing the upper mold and the lower mold is provided. And punching equipment. 2. The punching device according to claim 1, wherein the protruding tip of the cutting blade has a saw-tooth shape. 3. The upper mold and the lower mold are connected to each other with a predetermined gap maintained by a rubber connecting material, and the connecting material contracts at the time of punching to reduce the gap between the upper mold and the lower mold. The punching device according to claim 1 or 2, wherein: 4. The cutting plate according to claim 1, wherein the cutting plate is provided with a groove into which a tip of the cutting blade is inserted, and a contact surface with the cutting blade is formed of an elastic body. Punching equipment. 5. A material that is not elastically deformed is loaded into a portion surrounded by the upper cutting blade, and a punched object located inside the cutting blade is crushed at the time of punching. 5. The punching device according to any one of items 1 to 4. 6. An inner blade is further provided inside the cutting blade,
A material that is not elastically deformed is loaded inside the inner blade, and a punched object located inside the cutting blade is crushed at the time of punching and a part is cut by the inner blade, and a step is formed in the punched object. The punching device according to claim 5, wherein