JP2012171061A - Punching mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punching mold which forms a material passage gap having the fixed maximum gap distance and also has excellent maintainability.SOLUTION: Even immediately after the completion of a punching operation, a movable mold to be separated by pushing by a movable support elastic body 8 is abutted by a fastening means 6, and also directly or indirectly strongly pressurized to the fastening means 6 by the elastic repulsion of the compressed movable support elastic body 8. Thus, an operation to return by abutment on the fastening means 6 is canceled by the strong elastic pressurization force of the movable support elastic body 8. Then, the movable mold stays completely still at a maximum gap distance position.

Description

  In the present invention, a sheet-like material or a plate-like material is used to form a rectangle (IC card, credit card, game card, business card, etc.), polygon, circle (paper cup-shaped ice cream container with a circular lid, milk bottle Paper fitting lids, sheet or plate-like lids attached to the opening edge of paper or synthetic resin cup ramen containers by welding, fusing, bonding, etc., complex shapes (animals and other pattern plates) The present invention relates to a punching die for punching and forming a forming material such as a sheet, a logo plate or a sheet.

(1) A fixed mold in which four guide shafts fixed to the base of the punching device are erected, and a movable die lowered by a hammer of the punching device provided above the fixed mold, A movable type that is supported and guided by the four guide shafts by an elastic restoring force of a compression coil spring provided between
The fixed mold is a fixed frame body fixed to the base, a fixed side guide hole penetrating in the vertical direction provided in the fixed frame body, and a urethane rubber lump stored in a form to be placed on the base in the fixed side guide hole A fixed-side elastic body made of the punch-out which is placed on the fixed-side elastic body and accommodated in the fixed-side guide hole in a form, and the punch-out upper surface is flush with the upper surface of the fixed frame,
The movable mold has a movable side lower mold having a movable side guide hole having the same shape as the fixed side guide hole penetrating vertically, and an elastic side hole identical to the movable side guide hole provided at the upper portion of the movable side lower mold. A punch having a movable-side elastic body, a flange portion mounted on the upper portion of the movable-side elastic body, and a lower surface of the movable-side lower mold that is flush with the lower surface of the movable-side lower mold through the elastic-side hole and the movable-side guide hole; It consists of
The compression coil springs are attached to the four guide shafts between the fixed mold and the movable mold, and the movable mold is pushed up by its repulsive elastic force (repulsive urging force) to pass the material between the fixed mold and the movable mold. Forming a gap,
The form of the formed material formed by punching from a thin sheet material having a thickness of 0.1 mm or 0.2 mm is a form in which three small recesses are formed on one side of the outer periphery of the formed material. The form is a form in which three small convex portions formed along with the formation of the small concave portions are formed on one inner peripheral side of the opening after extraction,
The punch-out in the sink state due to the punch return operation by the hammer return operation returns to the state where the upper surface of the fixed mold and the punching surface are made the same surface by restoring the fixed elastic body, so that the forming material has been removed. The punched material and the forming material are integrally fed out of the mold after punching, and the small concave portion of the forming material is caught on the small convex portion of the opening after punching the punched material, There is known a punching die in which a forming material is fed out from a punched material without coming off. (For example: Japanese Patent Application Laid-Open No. 2006-315159)

Japanese Patent Laying-Open No. 2006-315159 (FIGS. 5, 6, and 9)

The prior art described above has the following drawbacks.
(1) Since the hammer is separated from the fixed mold at the time of non-punching, the formation of the material through gap at the time of non-punching is raised from the fixed mold side and supports the movable mold so that it can move up and down. It is due to the maximum expansion position of the compression coil spring that is passed through the shaft of the book and positioned between the fixed mold and the movable mold and separated by the repulsive elastic force when the fixed mold and the movable mold are not punched. The upward movement of the movable type is in the open state.
Since the material threading gap is determined by the compression coil spring that simply puts the movable mold on it, the movable mold swings up and down by the expansion and contraction of the compression coil spring immediately after hammering down, so the material threading gap width is stable. It is something that does not. For this reason, when the urging force of the compression coil spring becomes weaker after long-term use, the material passing gap becomes narrower. In order to prevent the narrowing of the material through-gap from becoming narrow enough for the material not to pass, and to prevent the movable mold from hitting the removed or formed material immediately after punching by the vertical movement by the expansion and contraction operation of the compression coil spring. In addition, considering this in advance, the material passage gap must be sufficiently wide.
Therefore, in narrow gaps such as 0.1 mm and 0.2 mm, when the hammer is released, the movable coil swings up and down due to the return repulsion of the compression coil spring, and hits the forming material. There was a drawback that it could not be formed.
(2) Further, in the technique of Patent Document 1, the forming material punched from the material is returned to the punched trace opening of the punched material, and the forming material is stored in the punched trace opening. It was conveyed out of the mold.
However, in the technique of Patent Document 1, as described in (1) above, a narrow material passage gap such as 0.1 mm and 0.2 mm cannot be formed. In order to prevent the material from coming into contact with the removed material or the formed material, the material through gap has to be 1 mm or more. If the material is as thin as 0.1 mm, 0.2 mm, etc., There is a risk that the forming material may not enter the trace, and there is a possibility that the removed material or the forming material may be countered. In this case, the forming material is deviated from a predetermined arrangement position, and the forming material is sandwiched between the rollers and the like of the transport unit in a state where a part of the forming material overlaps the material.
Therefore, the forming material is damaged and a defective product is generated, or the forming material is displaced from a predetermined arrangement position. For this reason, for example, the same arrangement as the punching arrangement position is adopted. In addition, there is a drawback that there is a risk that a forming material that cannot be stored in the forming material overlapping storage site is generated.
(3) In order to solve the above problem (2), the invention of Patent Document 1 has small recesses on the outer periphery of the forming material in order to prevent the forming material from being caught on the stamped trace of the scrap material. It had the disadvantage of being formed.

The present invention has been made in view of the prior art as described above, and a first object of the present invention is to provide a punching die that can form a material through gap in which the maximum gap distance does not change and has good maintainability. There is.
In addition to the first object, a second object is to provide a die for punching in which there is no risk that the forming material overlaps the already-extracted material in the mold.

In order to achieve the above object, the present invention is configured as follows.
<Invention of Claim 1>
A fixed mold fixed to the base of the punching device;
A movable mold that is movable toward the fixed mold in an opposing relationship with the fixed mold;
A punch-out that is provided in the fixed mold or the movable mold, punches out a forming material of a predetermined shape from a material positioned between the fixed mold and the movable mold, and does not punch or cut out;
A fixed mold side shaft mounting portion provided in the fixed mold;
A material passage gap for passing the material formed between the fixed mold and the movable mold;
A movable mold side shaft mounting portion which is a shaft through hole provided in the movable mold;
A connecting shaft main body, a fixed mounting portion provided on one side of the connecting shaft main body and attached to the fixed mold side shaft mounting portion, and a male screw or a female screw provided on the other side of the connecting shaft main body. A connecting shaft composed of a movable mounting portion, an elastic body, and a hollow portion penetrating the elastic body. The fixed shaft and the movable mold are attached to the connecting shaft through the connecting shaft. A movable support elastic body that is positioned between and elastically supports the movable mold;
The fixed mold mounting portion of the connecting shaft to which the movable support elastic body is mounted is fixed to the fixed mold side shaft mounting portion, and the connecting shaft is passed through the movable mold side shaft mounting portion to move the movable mold. In a state of being supported on the movable support elastic body, the movable support elastic body is compressed by being screwed to the movable mold mounting portion and tightening and moving the movable mold, thereby repelling the movable support elastic body. A punching die comprising a fastening means such as a nut or a bolt for restricting the movement of the movable die to move away from the fixed die by an attached elastic force.
The base of the device may be upward or downward, with the base facing up, the fixed type is down and the movable type is positioned above the fixed type, and the down type is fixed and the fixed type is up and movable The mold is located below the fixed mold. In addition, the technical category also includes a configuration in which the movable type and the fixed type are set sideways.
The materials to be punched are mainly sheet-like and plate-like, and specific examples include metal materials, paper materials, synthetic resin materials, rubber materials, non-woven fabrics, woven fabrics, food materials, etc. There are things, and there are various shapes.
Punch-out punching of forming material from material means punch-out of punching operation form, punch-out of punching operation form, punch-out consisting of cutting blades, etc. This is an operation mode in which the is formed.
<Invention of Claim 2>
A fixed die having a fixed side punch-out or a fixed side punch for punching a forming material out of a material, which is fixed to a base of a punching device;
A fixed mold side shaft mounting portion provided in the fixed mold;
The material passing gap for passing the material between the fixed mold and the fixed mold is formed, and the fixed side punch-out is pushed down to sink the material from the material gap. A movable mold having a movable punch for punching the forming material or a movable punch out to be sunk into the fixed punch;
A movable mold side shaft mounting portion which is a shaft through hole provided in the movable mold;
A connecting shaft main body, a fixed mounting portion provided on one side of the connecting shaft main body and attached to the fixed mold side shaft mounting portion, and a male screw or a female screw provided on the other side of the connecting shaft main body. A connecting shaft composed of a movable mounting portion, an elastic body, and a hollow portion penetrating the elastic body. The fixed shaft and the movable mold are attached to the connecting shaft through the connecting shaft. A movable support elastic body that is positioned between and elastically supports the movable mold;
The fixed mold mounting portion of the connecting shaft to which the movable support elastic body is mounted is fixed to the fixed mold side shaft mounting portion, and the connecting shaft is passed through the movable mold side shaft mounting portion to move the movable mold. In a state of being supported on the movable support elastic body, the movable support elastic body is compressed by being screwed to the movable mold mounting portion and tightening and moving the movable mold, thereby repelling the movable support elastic body. A punching die comprising a fastening means such as a nut or a bolt for restricting the movement of the movable die to move away from the fixed die by an attached elastic force.
The base of the device may be upward or downward, with the base facing up, the fixed type is down and the movable type is positioned above the fixed type, and the down type is fixed and the fixed type is up and movable The mold is located below the fixed mold. In addition, the technical category also includes a configuration in which the movable type and the fixed type are set sideways.
The materials to be punched are mainly sheet-like and plate-like, and specific examples include metal materials, paper materials, synthetic resin materials, rubber materials, non-woven fabrics, textiles, food materials, etc. is there.
Punch-out punching of forming material from material means punch-out of punching operation form, punch-out of punching operation form, punch-out consisting of cutting blades, etc. This is an operation mode in which the is formed.
<Invention of Claim 3>
The fixed mold side shaft mounting part is a fixed mold side shaft through hole,
The movable movable side shaft mounting part is a movable side shaft through hole or movable side screw hole,
The fixed mounting portion of the connecting shaft is a fixed mounting screw hole that does not have a fixed mounting male screw,
The movable attachment portion of the connecting shaft is a male screw that screws into the movable screw hole or a retaining portion that prevents the movable shaft from coming off from the movable shaft through hole,
The tightening means consists of a nut screwed into the fixed mounting male screw of the connecting shaft, or a tightening means consisting of a bolt screwed into the fixed mounting screw hole,
The punching die according to any one of claims 1 and 2, wherein the movable clamping movement and the compression adjustment of the movable supporting elastic body are performed by the clamping means. is there.
<Invention of Claim 4>
The maximum gap distance of the material through gap is a gap distance that is larger than the thickness of one piece of material and narrower than the thickness of two pieces of the material. The punching die described in 1.

As is clear from the above description, the present invention has the following effects.
<Effect of the Invention of Claim 1>
A fixed mold fixed to the base of the punching device;
A movable mold that is movable toward the fixed mold in an opposing relationship with the fixed mold;
A punch-out that is provided in the fixed mold or the movable mold, punches out a forming material of a predetermined shape from a material positioned between the fixed mold and the movable mold, and does not punch or cut out;
A fixed mold side shaft mounting portion provided in the fixed mold;
A material passage gap for passing the material formed between the fixed mold and the movable mold;
A movable mold side shaft mounting portion which is a shaft through hole provided in the movable mold;
A connecting shaft main body, a fixed mounting portion provided on one side of the connecting shaft main body and attached to the fixed mold side shaft mounting portion, and a male screw or a female screw provided on the other side of the connecting shaft main body. A connecting shaft composed of a movable mounting portion, an elastic body, and a hollow portion penetrating the elastic body. The fixed shaft and the movable mold are attached to the connecting shaft through the connecting shaft. A movable support elastic body that is positioned between and elastically supports the movable mold;
The fixed mold mounting portion of the connecting shaft to which the movable support elastic body is mounted is fixed to the fixed mold side shaft mounting portion, and the connecting shaft is passed through the movable mold side shaft mounting portion to move the movable mold. In a state of being supported on the movable support elastic body, the movable support elastic body is compressed by being screwed to the movable mold mounting portion and tightening and moving the movable mold, thereby repelling the movable support elastic body. The punching die is characterized by comprising a fastening means such as a nut or a bolt for restricting the movement of the movable die to move away from the fixed die by an attached elastic force. There is an effect.
That is,
The movable support elastic body that separates the fixed mold and the movable mold by the elastic force is compressed by the clamping movement of the movable clamping means, and the elastic repulsive force is increased. Therefore, the movable mold that is punched and pushed away from the movable support elastic body is stopped directly or jointly (when a washer or the like is interposed) between the fastening means and the compressed movable mold support. Since the elastic body is strongly pressed against the clamping means by the elastic repulsive force, the movement to return to the clamping means is canceled by the strong elastic pressing force of the movable support elastic body, and the movable mold is at the maximum gap distance position. It stops without a slight movement. In other words, the braking restriction force for braking the movable mold is realized by the strong damping braking force of the movable support elastic body that restricts the movement of the movable mold toward the fixed mold during the return operation immediately after punching. Even for material through gaps with narrow maximum gap distances such as 1 mm, 0.2 mm, and 0.3 mm, the movable mold does not hit the extracted material or the forming material, and therefore the narrow maximum gap distance such as 0.1 mm This makes it possible to provide a die for punching a material-through gap that is regulated by the above-mentioned.
In other words, this allows the forming material to be reliably put back into the trace of a thin material such as 0.1 mm, and can be transferred out of the mold without losing the formation material from the trace, such as a material passage gap of 0.15 mm. A material for punching a material through gap with a narrow maximum gap distance is realized.
Further, since the distance of the material passing gap is narrow, the movable mold has a short movable time, and accordingly, the punching mold with high productivity can be realized.
In addition, an effect that the elastic force of the movable support elastic body can be adjusted to an optimum value by a low-cost and simple operation of inserting a washer between the movable type or the fixed type and the movable support elastic body. Play.
In addition, the fixed mold and the movable mold are connected and integrated by the connecting shaft, the movable support elastic body, and the tightening means (hereinafter referred to as “connected integrated condition”), so that maintenance is performed when the maintenance period comes. Maintenance can be completed simply by removing the fixed die and movable die from the base of the punching device in the connected integrated state, and fixing the fixed gap and the fixed integrated state to the base of the punching device. . That is, during maintenance, maintenance is completed in a simple and short time, with no adjustments such as adjustment of the material through gap distance, and simple replacement work to the base of the punching device. Therefore, it is possible to shorten the apparatus stop time, shorten the production stop time, and reduce the maintenance cost.
In addition, the mold that has reached the maintenance period is kept in a consolidated and integrated state, transported to a maintenance factory, where necessary polishing, new blade formation, etc. are performed, set to the desired maximum gap distance, and stored in a consolidated and integrated state. You just have to.
Moreover, since the material through gap is formed by the movement of the movable type by tightening of the tightening means, the material that becomes the gauge of the maximum gap distance (two stacked punching materials, punching material and thinner material) The desired material passing gap distance can be easily, quickly and inexpensively set by simply tightening the nut in a state where the piled material may be placed).
<Effects of Invention of Claim 2>
A fixed die having a fixed side punch-out or a fixed side punch for punching a forming material out of a material, which is fixed to a base of a punching device;
A fixed mold side shaft mounting portion provided in the fixed mold;
The material passing gap for passing the material between the fixed mold and the fixed mold is formed, and the fixed side punch-out is pushed down to sink the material from the material gap. A movable mold having a movable punch for punching the forming material or a movable punch out to be sunk into the fixed punch;
A movable mold side shaft mounting portion which is a shaft through hole provided in the movable mold;
A connecting shaft main body, a fixed mounting portion provided on one side of the connecting shaft main body and attached to the fixed mold side shaft mounting portion, and a male screw or a female screw provided on the other side of the connecting shaft main body. A connecting shaft composed of a movable mounting portion, an elastic body, and a hollow portion penetrating the elastic body. The fixed shaft and the movable mold are attached to the connecting shaft through the connecting shaft. A movable support elastic body that is positioned between and elastically supports the movable mold;
The fixed mold mounting portion of the connecting shaft to which the movable support elastic body is mounted is fixed to the fixed mold side shaft mounting portion, and the connecting shaft is passed through the movable mold side shaft mounting portion to move the movable mold. In a state of being supported on the movable support elastic body, the movable support elastic body is compressed by being screwed to the movable mold mounting portion and tightening and moving the movable mold, thereby repelling the movable support elastic body. The punching die is characterized by comprising a fastening means such as a nut or a bolt for restricting the movement of the movable die to move away from the fixed die by an attached elastic force. Has the same effect as that of the first aspect of the invention.
<Effect of the Invention of Claim 3>
The fixed mold side shaft mounting part is a fixed mold side shaft through hole,
The movable movable side shaft mounting part is a movable side shaft through hole or movable side screw hole,
The fixed mounting portion of the connecting shaft is a fixed mounting screw hole that does not have a fixed mounting male screw,
The movable attachment portion of the connecting shaft is a male screw that screws into the movable screw hole or a retaining portion that prevents the movable shaft from coming off from the movable shaft through hole,
The tightening means consists of a nut screwed into the fixed mounting male screw of the connecting shaft, or a tightening means consisting of a bolt screwed into the fixed mounting screw hole,
The punching die according to any one of claims 1 and 2, wherein the movable clamping movement and the compression adjustment of the movable supporting elastic body are performed by the clamping means. Therefore, even with such a configuration, the same effect as the invention according to any one of claims 1 and 2 can be obtained.
<Advantageous Effects of Invention>
The maximum gap distance of the material through gap is a gap distance that is larger than the thickness of one piece of material and narrower than the thickness of two pieces of the material. Therefore, the punching die according to the present invention has the same effects as the invention according to any one of claims 1, 2, and 3, and the following effects.
That is,
In the state where the forming material has been returned to the trace of the extracted material from which the forming material has been removed by the punch-out return operation, and the maximum gap distance of the material through gap is a gap distance narrower than one piece of material, In the material through gap, there is an effect that the forming material can be sent out of the material through gap in a safe state without risk of coming off from the trace.
Thereby, there is no need for unevenness to keep the forming material in the trace, and a forming material that does not form unevenness on the edge can be obtained.
In addition, since the formed material in which the forming material is accommodated in the trace does not come out of the trace while the material is in the material through gap, the material through gap is defined as a vertical gap by placing the fixed mold and the movable mold sideways. It is possible to realize a punching device of the form described above. According to this, the punching apparatus which discharges | emits a material below from a material through a clearance gap from the upper direction is also attained.

It is an assembly exploded perspective view of Example 1 of the present invention. It is an assembly perspective view of Example 1 of the present invention. It is assembly sectional drawing of Example 1 of this invention. It is sectional drawing at the time of the punching operation | movement of Example 1 of this invention. It is sectional drawing at the time of hammer release of Example 1 of this invention. It is assembly sectional drawing of Example 2 of this invention. It is assembly sectional drawing of Example 3 of this invention. It is assembly sectional drawing of Example 4 of this invention. It is sectional drawing at the time of the punching operation | movement of Example 4 of this invention. It is sectional drawing at the time of hammer release of Example 4 of this invention. It is an assembly sectional view of Example 5 of the present invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments that are the best mode for carrying out the present invention shown in the drawings will be described below. However, the present invention is not limited to these examples. In the description of the embodiments described later, the same reference numerals are given to the same components as those of the above-described embodiments, and the description thereof is omitted.

In Example 1 shown in FIGS. 1 to 5, 1 is a punching die,
This punching die 1 is
A fixed mold 3 fixed to the base 2 of the punching device;
A movable mold 4 positioned so as to be movable up and down above the fixed mold 3, and connecting shafts 5 and 5 for connecting and integrating the movable mold 4 and the fixed mold 3;
Tightening means 6 and 6 which are screwed into the connecting means 5 and 5 to close the movable mold 4;
Attached to the connecting shafts 5 and 5 and positioned between the movable mold 4 and the fixed mold 3, and is squeezed and compressed by the fastening means 6 and 6, the movable mold 4 and the fixed mold 3 are elastically repelled. It consists of a movable support elastic body 8 which is separated by force and forms a material through gap 7 in which a maximum through gap distance is regulated by fastening means 6, 6 between the movable mold 4 and the fixed mold 3.

The fixed mold 3 has the following configuration.
A fixed base 12 having screw through holes 11 for passing bolts 10 fixed to the base 2 of the punching device at four corners;
Guide shaft mounting screw holes 13 (screw holes) provided at four locations of the fixed base 12;
Two fixed-type side shaft attachment portions 14, 14 formed of screw holes provided between the guide shaft attachment screw holes 13, 13;
A punch-out support 15 fixed by bolts to the upper part of the fixed mold base 12;
A punch-out movable support recess 16 formed on the punch-out support 15 with the top opened;
A punch-out guide body 19 is fixed to the upper portion of the punch-out support body 15 with a bolt, closes the opening portion of the punch-out movable support recess portion 16 to form a jaw portion 17, and is provided with a punch-out through guide hole 18 in the center. When,
A rubber elastic body such as a urethane rubber member, a nitro rubber member, or a punch-out compression elastic body 20 such as a compression coil spring, which is housed in the punch-out movable support recess 16;
The punch-out guide elastic body 20 is provided at the upper part of the punch-out side compression elastic body 20 and is movably accommodated in the punch-out movable support recess 16, and the punch-out side compression elastic body 20 is compressed by the punch-out guide body 19. A punch-out flange portion 21 sandwiched between the body 19 and the punch-out side compression elastic body 20,
The punch-out flange portion 21 is fixed by a bolt, is passed through the punch-out guide hole 18, and includes a fixed-side punch out 22 whose upper surface is flush with the upper surface of the punch-out guide body 19.
When pressure is applied to the fixed side punchout 22 from above, the punchout side compression elastic body 20 is compressed and contracted by the pressure, and the fixed side punchout 22 and the punchout flange portion 21 sink. The out-side compression elastic body 20 expands and causes the punch-out flange portion 21 and the fixed-side punch-out 22 to float, so that the punch-out flange portion 21 hits the jaw portion 17 and the lifting is stopped. Is flush with the upper surface of the punch-out guide 19.

The movable mold 4 is configured as described below.
A movable base 25;
A hammer receiving plate 26 fixed with bolts on the upper part of the movable base 25;
A punch base 27 fixed by bolts to the lower part of the movable base 25;
A punch neck 28 fixed by bolts to the lower part of the punch base 27;
A punch flange portion 29 fixed by bolts to the lower portion of the punch neck portion 28;
A movable punch 30 fixed by a bolt to the lower portion of the punch flange portion 29;
A neck passage body 33 having a neck passage hole 31 through which the punch neck portion 28 passes, and a lower surface serving as a jaw portion 32 against which the upper surface of the punch flange portion 29 abuts.
The lower part of the neck part through body 33 is fixed with a bolt, the lower part has a punch through hole 34, the upper part is opened and the flange accommodating part 35 is formed in a concave shape, and the lower surface thereof is the lower surface of the movable punch 30. A flange housing 36 which is the same surface as
Located below the punch flange portion 29 and housed in the flange housing portion 35, the punch flange portion 29 is pushed upward by an elastic repulsive biasing force and is urged against the jaw portion 32. A punch-side compression elastic body 37 compressed by the neck through body 33,
Four guide shaft passage guide holes 39 by guide pipes 38 attached to the four passage holes of the movable base 25;
It consists of two movable-type shaft attachment portions 40, 40 which are shaft through holes provided between the guide shaft through guide holes 39, 39.

  The connection shafts 5 and 5 are a connection shaft main body 45 formed of a straight shaft that is passed through the movable-type side shaft attachment portion 40, and a fixed-type side shaft attachment portion of the fixed die 3 provided on one side of the connection shaft 45. 14, a fixed mounting portion 46 formed of a male screw that is screwed to 14, a movable mounting portion 47 that is provided on the other side of the connecting shaft main body 45 and includes a male screw portion that protrudes from the top of the movable base 25, It comprises a nut 48 screwed into the fixed mold mounting portion 46 and positioned at the top of the fixed mold mounting portion 46.

  The movable support elastic body 8 attached to the connecting shaft main body 45 includes an elastic body 50 such as a compression coil spring, a urethane rubber elastic body, and a nitro rubber elastic body, and a hollow portion 51 that penetrates the elastic body 50. The connecting shaft body 45 is attached to the connecting shaft 5 so as to be movable through the hollow portion 51, and is positioned between the fixed mold 3 and the movable mold 4, and the movable mold 4 is moved from the fixed mold 3 by its elastic repulsive force. Elastic support in a separated state.

  In each of the four guide shaft mounting screw holes 13, a guide shaft 56 having a linear bearing 55 and having a male screw 58 at the bottom is fixedly raised by screwing the male screw 58 into the guide shaft mounting screw hole 13. The linear bearing 55 is passed through the guide shaft passage guide hole 39 of the movable die 4 to support and guide the movable die 4 to move up and down.

The fixed mold mounting portion 46 of the connecting shaft 5 to which the movable support elastic body 8 is mounted is fixed to the fixed mold side shaft mounting portion 14, and the connecting shaft 5 is passed through the movable mold side shaft mounting portion 40 to move the movable mold 4. In a state of being supported on the movable support elastic body 8, the washer 57 is attached to the movable mold mounting portion 47 protruding upward from the movable mold 4, and the tightening means 6 is screwed with the double tightening means 6. 4 is tightened and moved to compress the movable support elastic body 8, and the movement of the movable mold 4 to move away from the fixed mold 3 by the repulsive elastic force of the movable support elastic body 8 is tightened by a nut 6. The material passage gap 7 between the movable mold 4 and the fixed mold 3 is set to a maximum gap distance that is wider than one material A and narrower than two materials A. Yes.
In this embodiment, the maximum gap distance of the material A having a thickness of 0.25 mm and the material through gap 7 is set to a maximum gap distance that is wider than 0.25 mm of the material A and narrower than 0.5 mm of two sheets. Is set to 0.3 mm to 0.45 mm. (Cards are generally thin, about 0.25 mm, and credit cards, etc., are generally about 0.8 mm. The thickness of the lid for the cup noodle container is about mm.)
This state is a connection integrated type state in which the movable mold 4 and the fixed mold 3 are connected and integrated.

The material A is passed through the material through gap 7 and set. (See Figure 3)
The hammer 60 descends and hits the hammer receiving plate 27, and the entire movable mold 4 descends while compressing against the elastic repulsive force of the movable support elastic body 8, and the flange housing body 36, punchout guide body 19, Then, the material A is sandwiched between the movable punch 30 and the fixed punchout 22, and the lowering of the punchout guide body 19 is stopped by the flange storage body 36.
Further, the hammer 60 is lowered to contract the punch side compression elastic body 37, so that the flange housing body 36 cannot be lowered and the movable side punch 30 is lowered, and the movable side punch 30 is moved downward from the lower surface of the flange housing body 36. Protruded.
The protruding movable punch 30 presses the fixed punchout 22 while holding the fixed punchout 22 and the material A therebetween.
The punched-out compression elastic body 20 is compressed and contracted by the pressed-out fixed-side punchout 22, and the fixed-side punchout 22 sinks (moves) into the punch-out guide body 19.
The material A portion pressed and clamped by the movable side punch 30 and the fixed side punch-out 22 by the sinking operation is punched from the material A to form the forming material B, and the extracted material C having a trace from which the forming material B has been extracted. Is formed. (See Figure 4)
When the hammer 60 moves up, the movable mold 4 rises in a state where the entire movable mold 4 is in contact with the hammer 60 due to the elastic repulsion force of the movable support elastic body 8 (the elastic rebound push-up force of the movable support elastic body 8 from the rising speed of the hammer 60). The movable die 4 is raised faster than the movable die 4), and the movable die 4 directly hits the fastening means 6 or indirectly through a washer or the like, and the rise is stopped, and the material passing gap 7 is 0.3 mm to Stops at a maximum gap distance of 0.45 mm.
As the movable mold 4 is raised, the compression restraining force to the punch side compression elastic body 37 is released, the punch side compression elastic body 37 expands and pushes up the punch flange portion 29 with its elastic repulsive force, and the punch flange portion 29, the movable punch 30 integral with the punch 29 also rises, the punch flange 29 is pressed against the jaw 32 and stops. The movable punch 30 is entirely contained in the punch through hole 34, and its lower surface is the lower surface of the flange housing 36. Form the same surface.
On the fixed mold 3 side, as the movable mold 4 and the movable punch 30 are raised, the compression pressure to the punch-out compression elastic body 20 is released, so that the punch-out compression elastic body 20 expands and the punch-out flange is expanded. The punch 21 is pushed up and the upper surface of the punch-out flange 21 is brought into contact with the jaw 17 and stopped. As the punch-out flange 21 rises, the fixed punch-out 22 rises with the forming material B still on the fixed punch-off. The upper surface of 22 and the upper surface of the punch-out guide body 19 are flush with each other. Therefore, since the forming material B has no return place other than returning to the trace of the extracted material C, it is surely returned to the trace and the maximum through clearance distance is increased. The material through gap 7 of 0.3 mm to 0.45 mm wider than one sheet of material A and narrower than two sheets can be accommodated without being removed from the trace even if there is warping. It is transferable to the mom-type outside. (See Figure 5)

The movable support elastic body 8 separating the fixed mold 3 and the movable mold 4 by its elastic force is compressed by the movable mold 4 which is tightened and moved by the tightening means 6 and its elastic repulsive force is increased. Has been.
Therefore, even after the punching operation is completed, the movable mold 4 to be pushed away by the movable support elastic body 8 is stopped by the fastening means 6 (including a case where a washer or the like is interposed), and the compressed movable Since the elastic force of the mold supporting elastic body 8 strongly presses the clamping means 6 directly or indirectly (washer, ring, etc. between the movable mold 4 and the clamping means 6), The operation of hitting and returning is canceled by the strong elastic pressing force of the movable support elastic body 8, and the movable mold 4 is stopped without being slightly moved to the maximum gap distance position.
That is, since the braking restriction force for braking the movable die 4 is realized by the strong vibration damping braking force by the movable support elastic body 8, the movable die has been removed even as a narrow material passage gap of 0.3 mm to 0.45 mm. The material C and the forming material B are not hit. Even the material through-gap 7 regulated to an extremely narrow maximum gap distance of 0.1 mm can be punched.
Thereby, the forming material B can be surely returned to the trace of the scrap material C of the thin material A such as 0.25 mm, and the forming material B can be transferred out of the mold without coming out of the trace. A punching die having a material through gap with a maximum gap distance restricted to a narrow distance of 0.3 mm to 0.45 mm is realized.
In addition, an adjustment such that the elastic force of the movable support elastic body 8 can be optimized by a low-cost and simple operation of inserting a washer between the movable mold 4 or the fixed mold 3 and the movable support elastic body 8. Is easy to do.
Further, the fixed mold 3 and the movable mold 4 are connected and integrated (hereinafter referred to as “connected integrated type state”) by the connecting shaft 5, the movable supporting elastic body 8 and the fastening means 6, so that a maintenance period comes. Then, the fixed mold 3 and the movable mold 4 to be maintained are removed from the base 2 of the punching device while being in the connected and integrated state, and the base of the punching device having the maximum clearance distance set and maintained in the connected and integrated state is removed. Maintenance is completed only by fixing to 2.
That is, during maintenance, maintenance is completed in a simple and short time, with no adjustments such as adjustment of the material through gap distance 7 being performed, and simple replacement work of the integrated type of the punching device to the base 2. . Therefore, it is possible to shorten the apparatus stop time, shorten the production stop time, and reduce the maintenance cost.
In addition, the mold that has reached the maintenance period is kept in a consolidated and integrated state, transported to a maintenance factory, where necessary polishing, new blade formation, etc. are performed, set to the desired maximum gap distance, and stored in a consolidated and integrated state. And just prepare for the next replacement.
Further, since the desired material passing gap 7 is formed by the movement of the movable die 4 by tightening of the tightening means 6, it becomes a gauge of the maximum gap distance (a stack of two punching materials, a punching material and A material through gap with a desired maximum gap distance can be easily set at a low cost in a short time by simply tightening the nut in a state in which a thin material is stacked.

  In the second embodiment shown in FIG. 6, the main difference from the first embodiment is that the movable mold configuration is a movable mold 78 in which the movable mold punch is replaced with the movable mold punch, and the fixed mold arrangement is the fixed mold punch out. Is a fixed die 64 which is a fixed side punch that sinks the movable side punch-out, and a punching die 63 is formed as a connecting shaft 90 having a structure in which the connecting shaft is tightened by the fastening means on the fixed die side. .

  The configuration of the punching die 63 will be described in detail. (The description of the configuration that is not different from the first embodiment is omitted.)

The fixed mold 64 has the following configuration.
A fixed base 12;
A punch support 65 fixed to the upper part of the fixed base 12 with a bolt;
A punch neck 66 fixed to the upper portion of the punch support 65 by a bolt;
A punch flange portion 67 that is fixed to the upper portion of the punch neck portion 66 with a bolt and is thicker than the punch neck portion;
A fixed-side punch 68 that is fixed to the upper portion of the punch flange portion 67 with a bolt and is thinner than the punch flange portion 67;
A flange housing body 71 having a flange housing portion 70 that has a neck through hole 69 through which the punch neck portion 66 is passed, and that movably houses a punch flange portion 67 that is open and recessed at the top.
A punch guide 73 having a punch-through hole 72 through which the fixed-side punch 68 is passed and having the upper surface flush with the upper surface of the fixed-side punch 68;
In the flange housing portion 70, the punch guide body 73 and the punch flange portion 67 are compressed and sandwiched, and the punch flange portion 67 is urged and pressed against the jaw portion 74 which is the bottom surface of the flange housing portion 70. The punch side compression elastic body 75 is provided.

The movable mold 78 has the following configuration.
A movable base 25;
A punch-out support 79 fixed by a bolt to the lower part of the movable base 25;
A punch-out movable support recess 80 formed on the punch-out support 79 with its lower part open,
A punch-out guide body 85 which is fixed to the lower part of the punch-out support 79 with a bolt, closes the open portion of the punch-out movable support recess 80 to form a jaw 81, and has a punch-out through guide hole 82 in the center. When,
A rubber elastic body such as a urethane rubber member, a nitro rubber member, or a punch-out side compression elastic body 83 such as a compression coil spring housed in the punch-out movable support recess 80;
The punch-out compression elastic body 83 is provided in the lower part of the punch-out side compression elastic body 83 and movably accommodated in the punch-out movable support recess 80, and the punch-out side compression elastic body 83 is compressed by the punch-out guide body 85. A punch-out flange portion 84 sandwiched between the guide body 85 punch-out compression elastic bodies 83;
The punch-out flange portion 84 is fixed by a bolt, is passed through a punch-out guide hole 82, and includes a movable side punch-out 86 whose lower surface is flush with the lower surface of the punch-out guide body 85.
When the movable punchout 85 is pressed from below by the fixed punch 68, the punchout compression elastic body 83 is compressed and contracted by the pressure, and the movable punchout 85 and the punchout flange portion 84 sink downward. When the pressure is released, the punch-out side compression elastic body 83 expands to return the punch-out flange portion 84 and the movable side punch-out 85, and the punch-out flange portion 84 hits the jaw portion 81 and the operation stops. The lower surface of the movable punchout 85 is flush with the lower surface of the punchout guide 82.

The connection shaft 90 includes a connection shaft main body 91 formed of a shaft that passes through the hollow portion 51 of the movable support elastic body 8, and a movable attachment portion 92 formed of a bolt head provided on the upper portion of the connection shaft main body 91. It is composed of a fixed-type-side shaft mounting portion 93 that is a screw portion formed in the lower portion of the connecting shaft main body 91.
The fixed mold mounting portion of the fixed mold base 12 is a fixed mold mounting section 94 formed of a screw-through hole, and a tightening means 6 formed of a nut is inserted below the fixed mold mounting section 94 and a tightening tool such as a ratchet is inserted to tighten the tightening means. 6 is a tightening means storage portion 95 which is a space in which 6 can be tightened.
When the movable support elastic body 8 is sandwiched between the movable mold 78 and the fixed mold 64, the connecting shaft 90 is passed from the movable mold side shaft mounting section 40 to the fixed mold mounting section 94, and the fixed mold 64 and the movable mold 78. Insert a gauge in between, tighten the fastening means 6 by screwing it onto the fixed mold side shaft mounting portion 93, compress the movable support elastic body 8, and form a material through gap 7 having a desired maximum gap distance, The fixed mold 64 and the movable mold 78 are connected and integrated.

  In the third embodiment shown in FIG. 7, the main difference from the first embodiment is that the punch side compression elastic body 37 is compressed and sandwiched between the punch base 27 and the neck through body 33, and the movable mold 25 is lowered. A stopper 98 forcibly stopped is provided to form the bottom dead center gap 102. The connecting shaft is a connecting shaft 100 in which a screw hole 99 is provided in the upper portion of the connecting shaft main body 45, and the fastening means is a movable type. The punching die 97 is formed as a fastening means 101 that is passed through the side shaft mounting portion 40 and screwed into the screw hole 99 to fasten the movable die 25 and the movable die supporting elastic body 8.

  It is good also as a form which provides a screw hole in the lower part of a connection shaft, and screwes and fastens the fastening means which consists of a volt | bolt.

In the fourth embodiment shown in FIGS. 8 to 10, the main difference from the first embodiment is that a punching mold 107 is formed in which the fixed mold is the fixed mold 105 and the movable mold is the movable mold 106. .
The fixed mold 105 includes a fixed base 12 and a punch receiving body 109 having a punched groove 108 on the upper surface, which is fixed to the upper portion of the fixed base 12 with a bolt.
The movable mold 106 has a lower surface of a movable mold base 25 and a punch 110, which is fixed to the lower portion of the movable mold base 25 with a bolt and punches (cuts out) the forming material B from the material A (= cutting blade). The punch fixing body 111 is provided in a form protruding from the punch fixing body 111, and the lower surface of the punch fixing body 111 is provided so as to cover the outer side surface and the inner side surface of the punch 110, and is thicker than the blade width of the punch 110. An outer material restraining elastic body 112 provided outside the punch 110 made of a synthetic resin elastic member or a rubber elastic body, an inner material restraining elastic body 116 provided inside the punch 110, and an inner material restraining elastic body 116. And a punch sheath portion 113 in which a punch 110 composed of a gap between the outer material restraining elastic body 112 is housed.
Further, a bottom dead center shaft 114 is fixed to the lower surface of the movable base 25 with bolts, and a bottom dead center shaft 115 is fixed to the upper surface of the fixed base 12 with bolts. Reference numeral 115 denotes an opposing position, and a bottom dead center gap 102 is formed therebetween.
The material through gap 7 is formed by the upper surface of the punch receiving body 109 and the lower surface of the outer material restraining elastic body 112 and the inner material restraining elastic body 116, and the maximum gap distance is wider than the thickness of one material A. It is set (defined) by fastening the movable support elastic body 8 of the fastening means 6 to a distance narrower than the thickness of the two sheets.

  When the hammer 60 strikes, the movable mold 106 descends, the outer material restraining elastic body 112 and the inner material restraining elastic body 116 hit the material A, the lowering is stopped, and the contraction operation is performed. The holding elastic body 112 and the inner material holding elastic body 116 are contracted, and the outer material holding elastic body 112 and the inner material holding elastic body 116 and the punch receiving body 109 are held to hold the material. As the body 112 and the inner material restraining elastic body 116 contract, the cutting edge of the punch 110 protrudes downward from the outer material restraining elastic body 112 and the inner material restraining elastic body 116, and the cutting edge enters the row punched groove 108 to cut out the material. Then, the forming material B is punched and formed (see FIG. 9), and the movable die 106 is moved as the hammer 60 is raised. The elastic member 8 is moved upward by the repulsive force and stopped at the maximum through-gap distance of the material through-gap 7, and the forming material B and the removed material C are separated from the punch 110 by the outer material holding elastic body 112 and the inner material holding elastic body 116. It is pushed out of the blade edge (see FIG. 10).

A configuration in which a restraining member for restraining a material such as a metal plate, a synthetic resin plate, a wooden plate, or the like may be provided on the surface of the outer material restraining elastic body 112 and the inner material restraining elastic body 116 or one of them.
The material restraining elastic body may be a compression coil spring. In this case, the compression coil spring is preferably provided with a restraining member for restraining a material such as a metal plate, a synthetic resin plate, or a wooden plate.
Further, without providing the punch-in groove 108, a blade edge receiving sheet such as a paper sheet or a synthetic resin sheet is positioned on the upper surface of the punch receiving body 109, and the blade edge of the punch 110 comes close to or hits the blade edge receiving sheet at the time of punching. It may be stopped at a slight bite so that the cutting edge does not hit the upper surface of the punch receiver 109.
In addition, even if the punch 110 is not completely punched (not cut out), the forming material that is separated from the material is such that the cutting edge of the punch 110 is placed on the upper surface of the punch receiving body 109 without providing a cutting edge receiving sheet. It is possible to form the forming material by stopping it without reaching it.
Further, the inner and outer material-suppressing elastic bodies and the outer material-suppressing elastic body may be separate from each other, and the suppressing forces may be different.
The inner material restraining elastic body and the outer material restraining elastic body are made of the same material. For example, a metal block for suppressing the material is provided on the lower surface of the outer material suppressing elastic body, and a screw is attached to the metal block. A through hole is provided, and the bolt passed through the screw through hole is screwed into the screw hole of the punch fixed body 111 or the movable base 25 and tightened, and the elastic material for tightening the outer material is tightened and contracted to increase its elastic force. Good.
The elastic force of the inner material restraining elastic body and the outer material restraining elastic body, i.e., the restraining force that restrains the material, is suppressed with a strength that does not damage the forming material with the inner material restraining elastic body, and the extracted material part that becomes scrap material Is a very strong restraint of the elastic material that suppresses the outer material, so that the edge of the forming material can be formed cleanly.
Further, the inner material restraining elastic body and the outer material restraining elastic body or either one of the configurations may be configured by different elastic body layers. For example, a portion close to the punch 110 is a hard elastic body, and a portion away from the punch 110 is an elastic body that is not harder than that, or vice versa.

In the fifth embodiment shown in FIG. 11, the main difference from the fourth embodiment is that a punch 110, an outer material restraining elastic body 112 and an inner material restraining elastic body 116 are provided on the fixed mold 105 side, and a punch sheath on the movable mold 106 side. The punching die 117 having the structure provided with the portion 113 is formed.
More specifically,
The fixed mold 105 has a fixed mold base 12 and a punch 110 that is fixed to the upper part of the fixed mold base 12 with a bolt and punches (cuts out) the forming material B from the material A. A punch fixing body 111 provided in a form protruding from the punch 110, and provided on the upper surface of the punch fixing body 111 so as to cover the outer side surface and the inner side surface of the punch 110, and is thicker than the blade width of the punch 110. It comprises an outer material restraining elastic body 112 made of a synthetic resin elastic member or a rubber elastic body, and a punch sheath 113 in which the punch 110 formed on the outer material restraining elastic body 112 is housed.
The movable mold 106 is composed of a movable base 25 and a punch receiving body 109 having a punched groove A108 on the lower surface, which is fixed to the upper portion of the movable base 25 with a bolt.
In FIG. 11, the guide shaft 56 is omitted.

  The present invention is used in the industry of punching and forming a forming material from a material.

A Material B Forming material C Extracted material 1 Punching die 2 Punching device base 3 Fixed die 4 Movable die 5 Connecting shaft 6 Tightening means 7 Material passage gap 8 Movable support elastic body 10 Bolt 11 Screw through hole 12 Fixed base 13 Guide shaft mounting screw hole 14 Fixed mold side shaft mounting portion 15 Punch-out support 16 Punch-out movable support recess 17 Jaw portion 18 Punch-out through guide hole 19 Punch-out guide 20 Punch-out compression elastic body 21 Punch Out flange part 22 Fixed side punch out 25 Movable base 26 Hammer receiving plate 27 Punch base 28 Punch neck part 29 Punch flange part 30 Movable side punch 31 Neck part through hole 32 Jaw part 33 Neck part through body 34 Punch through hole 35 Flange storage part 36 Flange housing 37 Punch side compression elastic body 38 Guide tube 39 Guide shaft Guide shaft 40 Movable side shaft mounting portion 45 Connecting shaft body 46 Fixed mold mounting portion 47 Movable mounting portion 48 Nut 50 Elastic body main body 51 Hollow portion 55 Linear bearing 56 Guide shaft 57 Washer 58 Male screw 60 Hammer 63 For punching Type 64 Fixed type 65 Punch support 66 Punch neck 67 Punch flange 68 Fixed side punch 69 Neck through hole 70 Flange storage 71 Flange storage 72 Punch through hole 73 Punch guide 74 Jaw 75 Punch side compression elastic body 78 Movable Mold 79 Punch-out support 80 Punch-out movable support recess 81 Jaw portion 82 Punch-out through guide hole 83 Punch-out compression elastic body 84 Punch-out flange 85 Punch-out guide 86 Move-side punch-out 90 Connection shaft 91 Connection shaft main body 92 Movable mounting part 3 Fixed mold side shaft mounting section 94 Fixed mold mounting section 95 Tightening means accommodating section 97 Punching mold 98 Stopper 99 Screw hole 100 Connection shaft 101 Tightening means 102 Bottom dead center gap 105 Fixed mold 106 Movable mold 107 For punching Die 108 Punch containing groove 109 Punch receiving body 110 Punch 111 Punch fixing body 112 Outer material restraining elastic body 113 Punch sheath 114 Bottom dead center shaft 115 Bottom dead center shaft 116 Inner material restraining elastic body 117 Die for punching

Claims (4)

A fixed mold fixed to the base of the punching device;
A movable mold that is movable toward the fixed mold in an opposing relationship with the fixed mold;
A punch-out that is provided in the fixed mold or the movable mold, punches out a forming material of a predetermined shape from a material positioned between the fixed mold and the movable mold, and does not punch or cut out;
A fixed mold side shaft mounting portion provided in the fixed mold;
A material passage gap for passing the material formed between the fixed mold and the movable mold;
A movable mold side shaft mounting portion which is a shaft through hole provided in the movable mold;
A connecting shaft main body, a fixed mounting portion provided on one side of the connecting shaft main body and attached to the fixed mold side shaft mounting portion, and a male screw or a female screw provided on the other side of the connecting shaft main body. A connecting shaft composed of a movable mounting portion, an elastic body, and a hollow portion penetrating the elastic body. The fixed shaft and the movable mold are attached to the connecting shaft through the connecting shaft. A movable support elastic body that is positioned between and elastically supports the movable mold;
The fixed mold mounting portion of the connecting shaft to which the movable support elastic body is mounted is fixed to the fixed mold side shaft mounting portion, and the connecting shaft is passed through the movable mold side shaft mounting portion to move the movable mold. In a state of being supported on the movable support elastic body, the movable support elastic body is compressed by being screwed to the movable mold mounting portion and tightening and moving the movable mold, thereby repelling the movable support elastic body. A punching die comprising a fastening means such as a nut or a bolt for restricting the movement of the movable die to move away from the fixed die by an elastic force. A fixed die having a fixed side punch-out or a fixed side punch for punching a forming material out of a material, which is fixed to a base of a punching device;
A fixed mold side shaft mounting portion provided in the fixed mold;
The material passing gap for passing the material between the fixed mold and the fixed mold is formed, and the fixed side punch-out is pushed down to sink the material from the material gap. A movable mold having a movable punch for punching the forming material or a movable punch out to be sunk into the fixed punch;
A movable mold side shaft mounting portion which is a shaft through hole provided in the movable mold;
A connecting shaft main body, a fixed mounting portion provided on one side of the connecting shaft main body and attached to the fixed mold side shaft mounting portion, and a male screw or a female screw provided on the other side of the connecting shaft main body. A connecting shaft composed of a movable mounting portion, an elastic body, and a hollow portion penetrating the elastic body. The fixed shaft and the movable mold are attached to the connecting shaft through the connecting shaft. A movable support elastic body that is positioned between and elastically supports the movable mold;
The fixed mold mounting portion of the connecting shaft to which the movable support elastic body is mounted is fixed to the fixed mold side shaft mounting portion, and the connecting shaft is passed through the movable mold side shaft mounting portion to move the movable mold. In a state of being supported on the movable support elastic body, the movable support elastic body is compressed by being screwed to the movable mold mounting portion and tightening and moving the movable mold, thereby repelling the movable support elastic body. A punching die comprising a fastening means such as a nut or a bolt for restricting the movement of the movable die to move away from the fixed die by an elastic force. The fixed mold side shaft mounting part is a fixed mold side shaft through hole,
The movable movable side shaft mounting part is a movable side shaft through hole or movable side screw hole,
The fixed mounting portion of the connecting shaft is a fixed mounting screw hole that does not have a fixed mounting male screw,
The movable attachment portion of the connecting shaft is a male screw that screws into the movable screw hole or a retaining portion that prevents the movable shaft from coming off from the movable shaft through hole,
The tightening means consists of a nut screwed into the fixed mounting male screw of the connecting shaft, or a tightening means consisting of a bolt screwed into the fixed mounting screw hole,
The punching die according to any one of claims 1 and 2, wherein the movable clamping movement and the compression adjustment of the movable supporting elastic body are performed by the clamping means.   The maximum gap distance of the material through gap is a gap distance that is larger than the thickness of one piece of material and narrower than the thickness of two pieces of the material. Die for punching as described in 1.

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