JPH10113895A - Punched scrap removal tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely support a sheet material without producing displacement and a seam even with pliable sheet material thin paper, etc., by providing a pressing plate to clamp and support the sheet material by pressing it on a mold plate by positioning it against the mold plate free to approach and part from it. SOLUTION: A sheet material 11 is held and supported along an overall region from which refuse is removed between a lower surface of a pressing plate 27 of a template 24 and a mold plate 41 of a female mold 22 as the lower surface of the pressing plate 27 of the template 24 makes contact with an upper surface of the sheet material 11 and a coil spring 31 is compressed as it is further lowered. Consequently, even in the case when the sheet material 11 is pliable paper such as thin paper, etc., it is possible to certainly support it without producing a seam and displacement of refuse is never slipped. Thereafter, a contact part 36 of a punching member 25 hits a central part of refuse, pushes down refuse and extracts and drops it over a projection part 45 of the mold plate 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blank removal tool for removing a blank portion of a sheet material punched by a blanking machine, and to ensure that the blank is removed from the sheet material. It is.

[0002]

2. Description of the Related Art When a punched product of a desired shape is punched out of a sheet material such as a synthetic resin film, thin paper, or cardboard by a punching machine, if the product is completely removed by a single punching from the sheet material, it is conveyed. Since the so-called scum surrounded by the cut line is broken in the process, the punching operation cannot be performed continuously.

Conventionally, as shown in FIG. 13, a plurality of discontinuous portions (joints) 14 are provided on a cut line 13 around a punching waste (waste) 12 on a sheet material 11, and the waste 12 11 is not separated. Then, the scum 12 defined by the cutting line 13 and the joint 14 is removed from the sheet material 11 in another stripping step for removing punched chips.

In the stripping step, the sheet material is inserted between upper and lower molds to support the sheet material by pressing it from above and below, and in this state, a punch is pushed by a punching member to break a joint portion. , Separating the waste from the sheet material.

In supporting a sheet material, relatively rigid paper such as corrugated cardboard can hold the entire surface evenly even with partial support, but thin paper or other rigid paper can be held when sandwiched. Wrinkles are generated and displacement occurs. Especially,
When a large number of small products are punched from a single sheet material, high dimensional accuracy is required because there are many punched locations in the entire area of the sheet material. Can not be done.

Further, if there is variation or misalignment in the arrangement or size of the joints, all the joints cannot be broken even if the scum is pressed by the punching member, and only the punching member penetrates the sheet material. In some cases, scum may hang down from the sheet material via some of the fibers in the joint portion. This problem occurs remarkably when the sheet material is thin paper and the fiber length of the paper is long.

[0007]

Conventionally, in order to solve such a problem, a lower pin is provided on the lower side of the female plate and the lower pin is moved up and down, so that the residue is sandwiched between the lower pin and the upper pin. There is known a method of securely removing the battery. However, in this method, it is necessary to newly provide a lower pin, and there is a problem that it takes a very long time to set the lower pin.

Therefore, the present applicant has proposed a method using an upper pin having a projection and a female plate having an elastic piece provided in a concave portion (Japanese Patent Laid-Open No. Hei 7-132497). According to this, when the scum is pushed by the upper pin, the scum is curved downwardly convexly due to the resistance with the elastic piece, and is then released so as to be repelled and fly down.

However, even in this case, particularly in the case of paper having a long fiber length, the connected fibers pull on the sheet body side, and the periphery of the portion from which the residue has been removed is wrinkled vertically. In some cases, and furthermore, there is a problem that the fibers hang down without cutting the fibers.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems in the punching and dust removing tool, and has no rigidity such as thin paper.
Alternatively, it is another object of the present invention to provide a punching dust removing tool capable of reliably removing scum from a sheet material without generating wrinkles even in a sheet material having a long fiber length.

[0011]

According to a first aspect of the present invention, there is provided a punch removing tool for removing a punch from a sheet material, the punch being defined by a cut line and a joint. A female plate having an opening having a plurality of protrusions projecting inward from the edge while having a contour shape substantially the same as the contour shape of the debris; and A pressing plate that presses the sheet material against the female mold plate to support the sheet material, and in a state where the sheet material is supported by the pressing plate and the female mold plate, the substantially center portion is moved from the pressing plate side. And a punching member that pushes toward the female mold plate side.

Here, substantially the entire area of the sheet material excluding the punching waste is supported by, for example, the pressing plate and the female mold plate.

Preferably, the apparatus further comprises a substrate which is driven in a direction approaching and separating from the female mold plate, and wherein the pressing plate is supported by the substrate so as to be movable in a direction approaching and separating from the female mold plate. In addition, the distal end position is regulated by the regulating means by being urged in the direction approaching the female mold plate by the spring means, and when the pressing plate is at the distal end position, the leading end of the punching member is moved toward the female plate. The punching member is fixed to the substrate such that a tip of the punching member projects from the surface of the pressing plate when the pressing plate is positioned behind the surface and moves against the spring means. So that

Also, for example, a plurality of the punching members are arranged along a substantially central portion of the punching waste.

Further, the punching member has, for example, a contact portion having a sharp tip, and the contact portion comes into contact with the punched waste.

According to the punching dust removing tool of the present invention, the punching dust is pushed by the punching member while the sheet material other than the punching dust is sandwiched between the female mold plate and the pressing plate. Since the portion other than the punching waste is completely held, the sheet material other than the punching waste is not displaced by the pushing operation. Moreover, at this time, the punching dust is pushed down into an opening having substantially the same contour shape as that, but since the opening has a plurality of protrusions, some portions of the outer edge of the punching waste are formed in the protrusions. The punched waste is elastically deformed and pushed and removed while being pulled by the elastic deformation force, so that it can be reliably removed.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a cross-sectional view of a main part of a stamping dust removing tool according to an embodiment of the present invention. As shown in FIG. 1, the punching waste removing tool has an upper die 21 and a lower die 22. The upper die 21 is attached to a movable portion of a driving device (not shown) such as a press machine and is driven in the vertical direction in FIG. 1, while the lower die 22 is attached to a fixed portion of the driving device. Upper mold 2
When the upper mold 21 is lowered, the upper mold 21 and the lower mold 22 are engaged with each other, and the sheet material 1 sandwiched between the upper mold 21 and the lower mold 22 is formed.
One waste is cut off and falls downward.

The upper mold 21 generally includes a substrate 23 and a substrate 23.
And a punching member 25 fixed to the substrate 23. The substrate 23 has a rectangular plate-like shape, and is made of, for example, a plywood such as a plywood, and is fixed to a movable portion of a driving device by a fixture (not shown).

The template 24 has an outer shape substantially the same as that of the substrate 23, a relatively thin supporting plate 26 made of metal or wood, and a relatively thick pressing plate 2 bonded and fixed to the supporting plate 26.
It consists of seven. The pressing plate 27 is formed of a somewhat elastic synthetic resin material such as a sponge, and has a flat lower surface. The template 24 is attached to the lower side of the substrate 23 so as to be movable in the vertical direction (direction of approaching to and separating from the lower mold 22).

That is, a plurality of support blocks 28 are fixed on the upper surface of the substrate 23 at appropriate intervals by fixing bolts 29, and the columns 30 are supported by the support blocks 28 so as to be slidable in the vertical direction. Template 24 at the lower end of the
Is fixed. Further, a coil spring 31 serving as a spring means is wound around the support 30, and constantly urges the template 24 downward with respect to the substrate 23. Normally, as shown in FIG. 1, a lock nut 32, which is a restricting means screwed to the upper end of the column 30, comes into contact with the upper surface of the support block 28, thereby restricting the lower end position (tip position) of the template 24. When the external force acts, the template 24 can move upward against the coil spring 31.

FIG. 2 is a bottom view of one corner of the upper die of the punching waste removing tool of FIG. 1, and FIG. 3 is an enlarged view of a part III in FIG. Figure 1
As shown in FIG. 3, the support plate 26 of the template 24 and the pressing plate 27
Are provided with a plurality of openings 33 of the same size at the same position. The opening 33 corresponds to the position of the waste 12 of the sheet material 11 to be punched, and has substantially the same outline shape as the outline shape of the waste 12. Then, the punching members 25 are provided so as to face the respective openings 33.

FIG. 4 is a perspective view of the punching member. The punching member 25 includes, as shown in FIG.
A sharp contact portion 36 formed at the distal end of the main body 35 and an enlarged and bent fixing portion 37 formed at the base end of the main body 35
For example, it is formed integrally with a hard material such as steel. In this example, three punching members 25 are assigned to one opening 33. As shown in FIG. 3, three punching members 25 are arranged along the arc-shaped center line of the space of the opening 33. The central punching member 25 is formed to be relatively wide, and the punching members 25 on both sides are formed to be slightly narrower.

As shown in FIG. 1, the punching member 25 is provided with
Fixed to 3. The lock nut 32 is the support block 28
When the template 24 is in the lower end position by contacting the upper surface of the
State), the contact portion 36 at the tip of the punching member 25 is
And stays in the opening 33 above the lower surface of the pressing plate 27. When the template 24 is lifted upward against the spring force of the coil spring 31 therefrom, the punching member 25 relatively moves downward, and the abutting portion 36 at the tip moves to the pressing plate 27.
Is exposed below the lower surface of the.

On the other hand, as shown in FIG. 1, the lower mold 22 includes a relatively thin female mold plate 41 made of metal or wooden board and a female mold plate 4.
1 and a plywood-made female board 42 such as a plywood board, which is bonded and fixed to the drive unit 1 and fixed to a fixed portion of the drive unit by a fixture (not shown). The lower die 22 has a rectangular plate shape substantially the same as the template 24 of the upper die 21.

FIG. 5 is a top view of one corner of the lower die of the punching waste removing tool of FIG. 1, and FIG. 6 is an enlarged view of a VI part of FIG. Female template 4
1 is a flat surface facing the pressing plate 27, and as shown in FIGS. 1 and 5, the female mold plate 41 and the female substrate 42 each have a position (sheet) opposed to the opening 33 of the mold plate 24 described above. Openings 43 and 44 are provided at positions (corresponding to the scraps 12 of the material 11). The opening 44 of the female substrate 42 has a shape slightly similar to the contour of the waste 12 (represented by a two-dot chain line curve in FIG. 6), as indicated by a broken line in FIG. On the other hand, as shown by a solid line in FIG. 6, the opening 43 of the female mold plate 41 generally matches the contour shape of the waste 12, and the protrusion 45 protrudes to the inside of the waste 12 (the hatched portion in FIG. 6). ) Are formed at three places. That is, the opening 43 of the female mold plate 41 is smaller than the shape of the waste 12 only in the portion of the protrusion 45. FIG. 7 is a sectional view taken along line VII-VII of FIG.

In such a configuration, the sheet material 11 is carried in between the upper mold 21 and the lower mold 22, positioned at a predetermined position, and placed on the lower mold 22. As shown in FIG. 1, when the upper die 21 is at the raised position, the template 24 of the upper die 21 is at the lowermost position, and the contact portion 36 of the punching member 25 is in the opening 33. It is in.

Next, the upper mold 21 is lowered. As a result, the template 24 and the punching member 25 descend, and as shown in FIG. 8, the lower surface of the pressing plate 27 of the template 24 first contacts the upper surface of the sheet material 11, and the coil spring 31 further descends. The sheet material 11 is compressed between the lower mold 22 and the female mold plate 41.
Pressure. Here, the pressing plate 27 and the female mold plate 41 are
Since the places other than the openings 33 and 43 conforming to the outline shape 2 are flat, the sheet material 11 is pressed down and supported over the entire area excluding the scrap 12 to be removed. Therefore, even when the sheet material 11 is a rigid paper such as a thin paper, it can be reliably supported without generating wrinkles, and the position of the waste 12 does not shift.

By lowering the upper mold 21 further, FIG.
As shown in FIG. 7, the contact portion 36 of the punching member 25 is
It hits the upper surface of one waste 12. At this time, the contact portion 36 comes into contact with the center of the waste 12.

Next, when the upper die 21 is further lowered, the contact portion 36 pushes down the scum 12. However, since the opening 43 of the female mold plate 41 has a protruding portion 45 projecting inward, the 1 is restricted from descending by the protrusion 45, and FIG.
As shown in FIG. 0, the center of the waste 12 is curved convexly downward.

In the state in which the center of the waste 12 is elastically deformed and bent so as to project, the force concentrates on the outer edge of the waste 12 (joint at the outer edge), and the upper die 21 is further lowered. By doing so, a force obtained by adding the elastic deformation force to the pressing force is applied, and as shown in FIG. 11, all the joints are reliably broken, and the scum 12 is pulled out beyond the protruding portion 45 to be downward. Fall.

As described above, in the present cutting waste removing tool, the waste 1
Since the entire area of the sheet material 11 except for 2 is pressed and supported,
The sheet material 11 can be accurately supported without generating wrinkles, and the projections 45 provided in the openings 43 of the female mold plate 41 elastically deform (curve) the waste 12 and connect it to the outer edge of the waste 12. The force for breaking is concentrated, and the joint can be reliably broken.

FIG. 12 shows another example of the opening of the female mold plate, which corresponds to FIG. 6 described above. In the example of FIG. 12, a triangular projection 45 is formed on the upper center, and a slightly larger substantially triangular projection 45 is formed on both left and right sides. in this way,
The number, size, shape, position, and the like of the protruding portions 45 are appropriately selected based on the size, shape, and the like of the blank 12 to be punched.

In the above description, the opening 33 of the template 24 has the same size as the outline shape of the waste 12, but it is sufficient that the opening 33 has a size that allows the minimum punching member 25 to pass through.

In the above-described example, an example in which the scrap 12 is removed from the sheet material 11 has been described. However, the present invention is not limited to this, and a portion defined by a cut line and a joint is removed from the sheet material. Applicable in various cases,
For example, the present invention can be applied to a case where a product is punched from a sheet material.

[0036]

As described above, according to the present invention, the portion to be extracted can be curved by the projection provided at the opening of the female mold plate, and the force for breaking the joint can be concentrated on the outer edge thereof. The joint can be reliably broken. Further, by holding down and supporting the entire area of the sheet material except for the portion to be removed, it is possible to accurately support the sheet material without causing any position or wrinkles even with a rigid sheet material such as thin paper.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a stamping waste removing tool according to an embodiment of the present invention.

FIG. 2 is a bottom view of one corner of the upper die of the punching waste removing tool of FIG. 1;

FIG. 3 is an enlarged view of a part III in FIG. 2;

FIG. 4 is a perspective view of a punching member.

FIG. 5 is a top view of one corner of a lower die of the punching waste removing tool of FIG. 1;

FIG. 6 is an enlarged view of a portion VI in FIG. 5;

FIG. 7 is a sectional view taken along the line VII-VII of FIG. 6;

FIG. 8 is a process explanatory view of one embodiment.

FIG. 9 is a process explanatory view of one embodiment.

FIG. 10 is a process explanatory view of one embodiment.

FIG. 11 is a process explanatory view of one embodiment.

FIG. 12 is an explanatory view of another example of the opening of the female mold plate.

FIG. 13 is an explanatory diagram of scum provided on a sheet material.

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 sheet material 12 waste 13 cutout line 14 connection 21 upper mold 22 lower mold 23 substrate 24 mold plate 25 punching member 26 support plate 27 pressing plate 30 support column 31 coil spring 32 lock nut 33, 43, 44 opening 36 contact portion 41 female Template 42 Female board 45 Projection

Claims (5)

[Claims] 1. A punching chip removing tool for removing a punching chip defined by a cutting line and a joint from a sheet material, wherein the tool has a contour substantially the same as the contour of the punching chip and extends inward from an edge. A female plate provided with an opening having a plurality of projecting portions projecting therefrom; a pressing plate which is positioned so as to be able to approach and separate from the female template, and presses and supports the sheet material against the female template; And a punching member that pushes the substantially central portion from the side of the pressing plate toward the side of the female mold plate in a state where the sheet material is supported by the pressing plate and the female mold plate. Dust removal tool characterized by the following. 2. The punching dust removing tool according to claim 1, wherein substantially the entire area of the sheet material excluding the punching dust is supported by the pressing plate and the female plate. 3. A substrate driven in a direction approaching and separating from the female mold plate, wherein the pressing plate is supported by the substrate so as to be movable in a direction approaching and separating from the female mold plate, and a spring is provided. The tip is urged in the direction approaching the female mold plate by the means, and the tip position is regulated by the regulating means. When the pressing plate is at the tip position, the tip of the punching member is located rearward of the surface of the pressing plate. The punching member is fixed to the substrate such that the tip of the punching member projects from the surface of the pressing plate when the pressing plate moves and the pressing plate moves against the spring means. 3. A stamping waste removal tool according to claim 1 or 2. 4. The punching member according to claim 1, wherein a plurality of said punching members are disposed along a substantially central portion of said punching waste.
A stamping waste removing tool according to any one of the above. 5. The punching dust removing tool according to claim 4, wherein the punching member has a contact portion having a sharp tip, and the contact portion contacts the punching dust.