Elastic body for punching blade die, method for arranging elastic body for punching blade die, and punching blade die

Abstract

To provide an elastic body for a punching blade die capable of suppressing inconvenience caused by the edge surface of the elastic body expanding in the horizontal direction pressing and applying force to the punching blade. [Solution] This elastic body 4 for the punching blade die is positioned and fixed to the inside, outside, or both the inside and outside of a base part 3 and a punching blade 2 fixed to the base part 3, and is used to separate the object to be punched from the punching blade 2, and is characterized in that the elastic body 4 for the punching blade die has a covering area S2 that covers the inside and outside of the punching blade 2, and has pressure suppression holes 5, at least in the corresponding peripheral area where the punching blade 2 is present, that suppress the edge surface of the elastic body 4 for the punching blade die from pressing the punching blade 2 inward or outward.

Description

[Technical field]

[0001] The present invention relates to an elastic body used in punching blade dies such as spring blades and Thomson blades (Viking blades), and to a punching blade die using the elastic body. [Background technology]

[0002] When punching objects such as cardboard, corrugated cardboard, various sheets, or plates, a power spring blade or a Thomson blade may be used. The name "mainspring blade" comes from the fact that the blade is cut to the required length from a single long blade similar to the mainspring used in winding watches. Mainspring blades are often used in the punching process for sticker and label printing.

[0003] On the other hand, unlike the spiral blade, the Thomson blade is generally used not only for cutting paper containers, but also for cutting thick materials such as molded products, food trays, rubber, sponge, etc. The workpiece is placed on a base such as an iron plate, and the spiral blade and the Thomson blade are moved until they kiss-touch the base, and the entire length of the blade tip is pressed against the workpiece at the same time to cut it. Furthermore, as in Patent Document 1, typically, an elastic body such as a cushioning material that pushes back the scraps of the punched material is provided on the inside and outside of the punching blade. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5425321 Summary of the Invention [Problem to be solved by the invention]

[0005] For example, when an elastic body is provided inside a punching blade formed into a ring shape, the outer edge surface of the elastic body can be brought as close as possible to the punching blade to improve the holding ability and accuracy of the punched object when it is punched. However, when punching, the elastic body is compressed and bulges outward, so that the outer edge surface that bulges horizontally from the inside presses against the punching blade, deforming the punching blade, which poses a problem that it is not possible to secure the specified punching position or achieve precision. Even when an elastic body is provided on the outside of the punching blade, the punching blade can still be deformed by the bulging of the elastic body.

[0006] The present invention has been made to solve the above-mentioned problems. The object of the present invention is to provide an elastic body for a punching blade die which, in a configuration in which the elastic body is placed on the inside, outside, or both of the punching blade, can suppress inconveniences caused by the edge surface of the horizontally expanded elastic body pressing and applying force to the punching blade. Another object of the present invention is to provide a method for arranging an elastic body for a punching blade die and a punching blade die that can prevent the occurrence of the above-mentioned problems. [Means for solving the problem]

[0007] The elastic body for a punching blade die according to the first aspect of the present invention is An elastic body for a punching blade die, which is arranged and fixed to an inner side, an outer side, or both the inner side and the outer side of a base part and a punching blade fixed to the base part, for separating an object to be punched from the punching blade, The elastic body for the punching blade die has a covering area that covers the inside and outside of the punching blade, and has a pressure suppression hole in at least the corresponding peripheral area where the punching blade is present, which suppresses the edge surface of the elastic body for the punching blade die from pressing against the punching blade from the inside or outside.

[0008] A second aspect of the present invention is the elastic body for a punching blade die according to the first aspect, characterized in that the pressure suppression hole is provided on an entire surface of the elastic body for a punching blade die. A third aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the punching blade is formed in a ring shape.

[0009] A fourth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the punching blade is formed in a straight or curved shape other than a ring shape. A fifth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that an opening rate of the pressure suppression holes with respect to the elastic body for a punching blade die is 10% or more and 80% or less.

[0010] A sixth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the hardness of the elastic body for a punching blade die measured using an Asker hardness scale is 10 or more and 90 or less. A seventh aspect of the present invention is an elastic body for a punching blade die according to the first or second aspect, characterized in that the amount of protrusion of the elastic body for a punching blade die from the surface of the base part when no pressure is applied to the object to be punched is greater than the amount of protrusion of the punching blade from the base part.

[0011] An eighth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the pressure suppression holes are formed at an arrangement density that makes the degree of expansion and contraction of the elastic body for the punching blade die uniform. A ninth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the shape of the pressure suppression hole is a regular polygon or a circle.

[0012] A tenth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the pressure suppression hole has a shape of a regular cross. An eleventh aspect of the present invention is an elastic body for a punching blade die as described in the first or second aspect, characterized in that the pressure suppression holes are composed of multiple types of pressure suppression holes differing in at least one of area and shape.

[0013] A twelfth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the pressure suppression hole is configured as a through hole. A thirteenth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, characterized in that the pressure suppression holes are provided in a uniform arrangement that suppresses horizontal fluctuations of the elastic body for a punching blade die.

[0014] A fourteenth aspect of the present invention is the elastic body for a punching blade die according to the first or second aspect, The connector has a rectangular individual part and a connecting part which connects the individual parts in one direction, and a circular hole which acts as the pressure suppression hole when viewed in a plane is provided at the center of each of the individual parts, and the connecting part is formed with a circular notch so that the width of the connecting part is small.

[0015] A method for arranging an elastic body for a punching blade die according to a fifteenth aspect of the present invention comprises the steps of: A base part to which a punching blade is fixed; An elastic body for a punching blade die is used, the punching blade die elastic body has a covering area that covers the inside and outside of the punching blade, and has a pressure suppression hole that suppresses the edge surface of the punching blade die elastic body from pressing the punching blade from the inside or outside at least in a corresponding peripheral area where the punching blade is present, After the punching blade is punched out of the punching blade die elastic body, The punching blade die elastic body after punching is disposed and fixed at a required position on the inside, outside or both the inside and outside of the punching blade.

[0016] A punching blade according to a sixteenth aspect of the present invention comprises: A punching blade and A base portion to which the punching blade is fixed; and an elastic body for a punching blade die, The elastic body for the punching blade die has a covering area that covers the inside and outside of the punching blade, and has a pressure suppression hole in at least the corresponding peripheral area where the punching blade is present, which suppresses the edge surface of the elastic body for the punching blade die from pressing against the punching blade from the inside or outside. Effect of the Invention

[0017] The present invention can provide an elastic body for a punching blade die that is capable of suppressing inconveniences caused by the edge surface of the horizontally expanded elastic body pressing and applying force to the punching blade in a configuration in which the elastic body is placed on the inside, outside, or both of the punching blade. It is also possible to provide a method for arranging an elastic body for a punching blade die and a punching blade die that can similarly suppress the occurrence of such inconveniences. [Brief description of the drawings]

[0018] [Figure 1] FIG. 2 is a plan view of an elastic body for a punching blade die according to an example of the present embodiment. [Diagram 2] FIG. 2 is a perspective view showing an example of a Thompson-type punching die for cutting a punched object in the present embodiment. [Diagram 3] 13 is a plan view showing the positional relationship after punching with a punch blade in a configuration using an elastic body for a punch blade die in which pressure suppression holes are provided on the entire surface in this embodiment. FIG. [Figure 4] FIG. 11 is a vertical cross-sectional view of the state before punching is performed in the case where a configuration is adopted in which an elastic body for a punching blade die is disposed and fixed inside the punching blade in this embodiment. [Diagram 5] FIG. 2 is a vertical cross-sectional view during punching in the present embodiment. [Figure 6] FIG. 11 is a plan view showing a configuration in which a ring-shaped punching blade having a complex shape is used in this embodiment. [Figure 7] FIG. 13 is a plan view showing the positional relationship after punching with a punching blade in a configuration in which a non-annular punching blade is used in the present embodiment. [Figure 8] 10 is a plan view showing another example of the configuration of the elastic body for the punching blade die according to the embodiment. FIG. [Figure 9] 4 is a plan view showing the positional relationship after punching with a punch blade of the elastic body for the punch blade die according to the embodiment. FIG. [Figure 10] 1A to 1E are plan views showing examples of pressure suppression holes provided in an elastic body for a punching blade die according to the present embodiment. [Figure 11] 13 is a diagram showing an example in which a pressure suppression hole in an elastic body for a punching blade die is formed of an irregularly shaped body. FIG. [Figure 12] 13A and 13B are diagrams showing another example in which the pressure suppression hole of the elastic body for the punching blade die is formed of an irregularly shaped body. [Figure 13] FIG. 2 is a perspective view showing an example of a punching blade die according to the present embodiment. [Figure 14] 14 is an enlarged, partially cutaway plan view of an elastic body for a punching blade die used in the punching blade die shown in FIG. 13. [Figure 15] FIG. 13 is a plan view showing a state in which a conventional elastic body for a punching blade die is attached to the entire surface. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an elastic body for a punching blade die, a method for arranging an elastic body for a punching blade die, and a punching blade die according to one embodiment of the present invention will be described with reference to the drawings. The punching blade die in which the elastic body for the punching blade die is arranged will be described first. The elastic body 4 for a punching blade die will be abbreviated to elastic body 4 as appropriate. [First embodiment] 1 to 5 are diagrams illustrating a first embodiment of the present invention. As shown in Fig. 2, the punching blade die 1 according to this embodiment has a configuration in which a punching blade 2 protrudes from a rectangular base portion 3. In Fig. 2, for simplicity, a part of the pressure suppression hole 5 of the elastic body 4 is omitted.

[0020] <Base part 3> As shown in Fig. 2, an example is shown in which the base portion 3, also called a die board, is configured with a back plate portion 10 to which the punching blade 2 is attached and a holding portion 11 (which can also be called a base material portion) that supports the punching blade 2. An aluminum plate or the like is used for the back plate portion 10, and an acrylic plate or the like is used for the holding portion 11. The back plate portion 10 and the holding portion 11 may be formed from a transparent material.

[0021] <Punching blade 2> The punching blade 2 is configured to protrude a predetermined length from the surface of the base part 3 [the surface of the lowermost holding part 11 (closest to the object to be punched) in the case of multiple layers], and in the case of a spring blade, it is often configured with a blade height of 1 mm or more and 10 mm or less, while in the case of a Thomson blade, it is often configured with a blade height of 1 mm or more and 100 mm or less.

[0022] The punching blade 2 can be configured in a ring shape that divides the inside and outside when viewed from above. Also, as described later, the punching blade 2 can be configured in a straight or curved shape other than a ring shape. In this embodiment, the punching blade 2 is configured in a rectangular ring shape with right angles at the four corners. The shape of the ring is determined by the shape required for the object 7 to be punched, such as paper, cardboard, sheet material, metal plate, sponge, etc., and the periphery of the ring is formed with unevenness and curves. In this specification, the term "ring" is used to include a concept including shapes such as circles, polygons such as rectangles, and the outer edge shapes of closed curved surfaces.

[0023] <Elastic body 4 for punching blade die and method for arranging elastic body for punching blade die> The configuration of the elastic body 4 and the method of arranging the elastic body in this embodiment will be described. An elastic body 4 is used that has a cover area S2 that covers the inside and outside of an assumed punching blade 2, and has pressure suppression holes 5 evenly provided over the entire surface of the elastic body 4. Then, by punching the elastic body 4 with the punching blade 2 provided on the base part 3 as shown in Fig. 2, it is possible to arrange the elastic body 4 covering the entire surface both inside and outside the punching blade 2 as shown in Fig. 3. In Fig. 3, 4A denotes the elastic body 4 located inside the punching blade 2, and 4B denotes the elastic body 4 located outside the punching blade 2. However, if necessary, it is also possible to fix only the inside, for example, only the elastic body 4A on the inside of the punching blade 2 as shown in Figures 4 and 5, and remove the elastic body 4B on the outside. Conversely, it is also possible to fix only the elastic body 4B on the outside of the punching blade 2.

[0024] The pressure suppression holes 5 provided in the elastic body 4 are preferably provided on the entire surface of the elastic body 4, since they can accommodate any arrangement and shape of the punching blade 2. The presence of the pressure suppression holes 5 allows for a portion that contacts the punching blade 2, such as the solid portion 17 (straight portion) in Fig. 14, and a portion that does not contact the punching blade 2, such as the circular notch 19, to be formed, so that the pressure applied to the punching blade 2 when the elastic body 4 expands in the horizontal direction can be made sufficiently small to cause no problem. However, the present invention does not exclude the manufacture and sale of an elastic body 4 in which the pressure suppression holes 5 are not provided on the entire surface of the elastic body 4, but are provided only in the corresponding peripheral region where the punching blade 2 is present.

[0025] In the configuration of Fig. 3, five rectangular ring-shaped punching blades 2 with rounded corners as shown in Fig. 2 are provided on a base part 3. By punching out a flat plate-shaped elastic body 4 with pressure suppression holes 5 evenly opened all over it so as to cover the entire inside and outside of the punching blades 2, it is possible to achieve a configuration in which the elastic body 4 is arranged and fixed on both the inside and outside of each of the five punching blades 2.

[0026] The contact area of ​​the surface of the elastic body 4 that contacts the punching blade 2 from the inside or outside is reduced due to the presence of the pressure suppression hole 5, and when the elastic body 4 is compressed in the vertical direction during punching, the pressure suppression hole 5 in the middle can deform, thereby reducing the force applied from the inside or outside of the punching blade 2.

[0027] Furthermore, in this method of positioning an elastic body for a punching blade die, the elastic body 4 having the pressure suppression hole 5 is punched out in a manner that covers the entire inside and outside of the punching blade 2, so that the elastic body 4 can be held so as to support the punching blade 2 from both the inside and outside, and the elastic body 4 can be positioned well in a state that is almost in contact with the inside or outside of the punching blade 2.

[0028] FIG. 15 is a plan view showing an example of a conventional elastic body 4 in which sponge is attached over the entire surface. 14, in contrast to the configuration of this embodiment, a plate-shaped elastic body 4 without pressure suppression holes 5 is attached, and so the edge surface of the elastic body 4 comes into contact with the entire inner and outer surfaces of the punching blade 2. With this configuration, there was a problem that the punching blade 2 would be deformed if the force acting on the punching blade 2 increased due to expansion of the elastic body 4 when pressed against it due to slight misalignment of the elastic body 4 or various other factors.

[0029] The elastic body 4 according to this embodiment is a cushioning material provided for the punching blade 2, and can be made of any material that is commonly used for various rubber materials (sponge) for general springing. It is made of a material having a predetermined compressibility and restorability according to the desired application of the punching blade die 1. For example, the following materials can be given as examples of such materials.

[0030] (1) Urethane rubber is flexible, durable, and has high resilience, allowing it to withstand repeated use. (2) Silicone rubber, which has high temperature resistance, is resistant to chemicals, and can have its hardness adjusted as needed; (3) Foam rubber (sponge rubber) is flexible, easy to process into fine shapes, and has excellent durability. (4) Lightweight, highly shock-absorbing EVA foam, (5) Various types of cork that are lightweight and have good resilience; (6) Various felt materials that are flexible, have moderate hardness, and are resistant to wear The hardness of the elastic body 4 as measured by the Asker rubber hardness scale is preferably 10 or more and 90 or less, more preferably 15 or more and 80 or less, and the most commonly used range is 15 or more and 75 or less.

[0031] When the elastic body 4 is provided inside the punching blade 2, it is usually fixed to the surface of the holding part 11 by a predetermined fixing method. As such a fixing method, a method of applying an adhesive such as a bond to the bottom surface of the elastic body 4 and directly attaching it to the base part 3 as a die board can be used. There is also a method of attaching the elastic body 4 to the base part 3 using an intermediate layer such as double-sided tape or a magnetic sheet. In addition, a mechanical fixing method of fixing the cushion member to the die board with screws or bolts can be used if necessary. However, since the method or means for providing the elastic body 4 inside or outside the punching blade 2 can be appropriately selected from known methods, the present invention is not limited to the attachment method.

[0032] As shown in Figs. 1, 3 and 6, the coverage area S2 of the elastic body 4 must be large enough to cover the outside as well as the inside area S1 of the punching blade 2 and ensure stable punching.

[0033] Since the elastic body 4 is a consumable item, the elastic body 4 of each punching blade die 1 adopted by each client is replaced at a certain period of time or when it is worn out. In this replacement process, the manufacturer of the punching blade die 1 provides each client with an elastic body 4 corresponding to the object to be punched adopted by each client in advance by mail or the like. Basically, it is sufficient to provide a large sponge of 500mm x 500mm or 1000mm x 500mm with holes drilled all over the surface to the client. In addition, the manufacturer can continue to maintain the good condition of the elastic body 4 by replacing the worn elastic body 4 of each client as necessary. In this way, the elastic body 4 according to the present invention is provided to the client alone as a replacement part.

[0034] <Pressure suppression hole 5> The pressure suppression hole 5 is a hole provided in the elastic body 4, and is preferably configured as a through hole penetrating the elastic body 4. However, as long as the hole configuration can achieve a predetermined pressure suppression function in this embodiment, it is not excluded that the pressure suppression hole 5 is formed as a hole with a bottom at a position on the side of the base part 3. Furthermore, the pressure suppression hole 5 may be provided at least in the corresponding peripheral area where the punching blade 2 exists so as to suppress the edge surface of the elastic body 4 from pressing the punching blade 2 from the inside or outside.

[0035] Generally, when pressure is applied to the large-area elastic body 4 so as to sandwich it from above and below, the center, intermediate and peripheral parts of the elastic body 4 expand horizontally with respective degrees of deformation, and therefore the arrangement of the pressure suppression holes 5 is determined so that the deformation in each part is absorbed by the pressure suppression holes 5 in relation to the position of the punching blade 2. As described above, it is preferable to provide the pressure suppression holes 5 so that they are positioned almost uniformly over the entire surface area of ​​the elastic body 4.

[0036] On the other hand, since the punching blade die 1 performs punching operations multiple times and continuously over time, it is necessary to have an area per unit that can obtain shape restoring ability so that the horizontal deformation absorbed in each part of the elastic body 4 can return to its original state so that punching waste can be removed efficiently.

[0037] Therefore, the preferable conditions for the elastic body 4 are exemplified as follows. (1) Opening ratio of pressure suppression hole 5 The opening ratio of the pressure suppression holes 5 to the elastic body 4 is preferably 10% to 80%, and more preferably 30% to 60%. If it is less than 10%, there is a high possibility that the deformation of the elastic body 4 cannot be absorbed, and if it exceeds 80%, the repulsive force decreases and the effect of removing the punching waste is weakened, which is not preferable.

[0038] (2) Uniformity of arrangement of pressure suppression holes 5 During punching, the pressure suppression hole 5 is subjected to a force from all around it that causes it to deform (expand) inward, so a uniform type hole is used in which the degree of horizontal expansion and contraction per unit area of ​​the elastic body 4 is made uniform.

[0039] In addition, the above-mentioned "uniformization" means that the pressure suppression holes 5 are uniformly arranged so as to achieve the horizontal deformation absorption and shape restoration of the pressure suppression holes 5 even after multiple uses, and are substantially satisfactory in terms of suppressing pressure on the punching blade 2 and removing punching waste. This uniformity can be understood from the regularity of the pressure suppression holes 5 shown in FIGS.

[0040] (3) Size of pressure suppression hole 5 The maximum length in the horizontal direction (horizontal and vertical directions) of the pressure suppression hole 5 (for example, the diameter in the case of a circular pressure suppression hole 5, or the length of the diagonal in the case of a square) is preferably 1 mm or more and 10 mm or less, and more preferably 2 mm or more and 5 mm or less. As shown in Fig. 8, a configuration in which pressure suppression holes 5 of multiple sizes or shapes coexist can also be adopted.

[0041] (4) Shape of pressure suppression hole 5 In this embodiment, circular through holes as shown in Figures 1 to 5 are used as the pressure suppression holes 5. However, pressure suppression holes 5 having shapes other than circular as shown in Figures 10 to 12 can also be used. These pressure suppression holes 5 will be described in the fourth embodiment.

[0042] The operation of this embodiment will be briefly described below mainly with reference to FIGS. Fig. 4 is a cross-sectional view taken along a cutting line (not shown) that crosses the pressure suppression hole, showing the state before punching. Fig. 5 is a view showing how the elastic body of Fig. 4 is compressed during punching. The configurations shown in Figures 4 and 5 show the case where, when an elastic body 4 having a covering area S2 covering the inside and outside of the punching blade 2 is punched as shown in Figure 3, the outer elastic body 4 is removed and the elastic body 4 is positioned and fixed only on the inside of the punching blade 2. 4 and 5, the degree of deformation of each portion, such as the diameter D1 to diameter D2 of the pressure suppression hole 5, is drawn much larger than it actually is in order to clearly emphasize the effect of this embodiment.

[0043] The punching blade die 1 shown in Fig. 4 has a different configuration from the base part 3 shown in Fig. 2, and has a punching blade 2 fixed to a base part 3 formed of a single metal plate or the like so as to protrude downward in Fig. 4. Fig. 4 illustrates a configuration in which the punching blade die 1 descends toward the object 7 to be punched, but as long as the punching blade die 1 can move relatively to the object 7 to punch the object 7, the setting of the relative movement direction (up, down, left, right, etc.) can be appropriately changed.

[0044] 4 is formed with six through holes as an example of the pressure suppression holes 5, and the upper surface of the elastic body 4 is firmly fixed to the lower surface of the base part 3 with an adhesive or the like. If necessary, a positioning part (not shown) for attaching the elastic body 4 may be provided on the lower surface of the base part 3. Examples of such a positioning part include a recess into which the upper surface of the elastic body 4 is fitted, a positioning protrusion, and other engagement structures with the upper surface of the elastic body 4 or the lower surface of the base part.

[0045] In the state before punching in Fig. 4, the height of the elastic body 4 is set so that the amount of protrusion of the elastic body 4 from the underside of the base part 3 is greater than the amount of protrusion of the punching blade 2 from the base part 3 by a length T. The length T is set to a length that allows good punching processing in accordance with the material of the workpiece 7 and the material (compressibility) of the elastic body 4. Note that in this embodiment, even if the amount of protrusion of the elastic body 4 from the underside of the base part when no pressure is applied is the same as or smaller than the amount of protrusion of the punching blade 2 from the base part 3, it can be used as long as the punched waste can be easily ejected from the punching member.

[0046] When the punching blade 2 is lowered from the state shown in FIG. 4 as indicated by the arrow, the tip of the punching blade 2 cuts the workpiece 7 in a punching manner as shown in FIG. 5, thereby obtaining a punched member 12 of a predetermined shape.

[0047] In the state shown in Fig. 5, the portions of the elastic body 4 present between the pressure suppression holes 5 expand horizontally as shown in Fig. 5 due to pressure from above, but since the pressure suppression holes 5 deform from diameter D1 to diameter D2 to absorb the deformation of each portion of the surrounding elastic body 4, the force with which the straight portions of the elastic body 4 (not shown in Fig. 5; see, for example, the straight portions of the solid portions 17 in Fig. 14) that abut against the inner surface 2a of the punching blade 2 other than the pressure suppression holes 5 of the elastic body 4 press against the inner surface 2a of the punching blade 2 is suppressed to be smaller by the amount of the pressure suppression holes 5 provided. Therefore, it is possible to suppress or prevent the occurrence of an inconvenience in which the edge surface of the elastic body 4 presses the inner surface 2a of the punching blade 2 outward, causing the punching blade 2 to be deformed.

[0048] One feature of this embodiment is that a pressure suppression hole 5 is provided in the peripheral area corresponding to the punching blade 2 to isolate the expansion action in each part of the elastic body 4 when pressure is applied so as to prevent large horizontal expansion in the straight portion where the punching blade 2 abuts.

[0049] As described above, the pressure suppression holes 5 are of the uniform type, which uniformize the degree of horizontal expansion and contraction in the entire circumferential direction per unit area of ​​the elastic body 4. Therefore, the protrusion into the pressure suppression holes 5 due to deformation of the material of the elastic body 4 caused by compression in each region (or the entire region) of the elastic body 4, and the restoration of the pressure suppression holes 5 to their original shape can be uniform, and the elastic body 4 can maintain stable function even when used for long periods of time.

[0050] [Second embodiment] Fig. 6 is a plan view showing an example of a ring-shaped punching blade 2 having a deformed shape, rather than a rectangular or round ring-shaped punching blade 2. Fig. 6 shows a star-shaped ring-shaped punching blade 2 as a deformed shape. Even with the punch blade 2 having an annular shape of various shapes, by providing the pressure suppression holes 5 on the entire surface of the elastic body 4, the force acting on the punch blade 2 from the inside or outside can be reduced. 6, it would be extremely difficult to position and fix the punch blade 2 and the elastic body 4 with an adhesive or the like in the small gap, for example a gap of 1 mm, between the punch blade 2 and the elastic body 4. Even with such a complex and detailed configuration, it is possible to attach the elastic body 4 satisfactorily by using the method of the present invention and providing a pressure suppression hole 5 in a large elastic body 4 having a covering area that covers the inside and outside of the punch blade.

[0051] [Third embodiment] Fig. 7 is a plan view showing a third embodiment. The punching blade 2 of the present invention is not limited to the ring-shaped punching blade 2, and a punching blade 2 formed in a straight or curved shape (not shown in Fig. 7) other than the ring shape may also be used. In Fig. 7, a punching blade 2 extending in the horizontal direction and a punching blade 2 extending in the vertical direction are shown. This is because even if the shape is not circular but straight or curved, force is applied from both sides of the punching blade 2 during punching. Furthermore, this third embodiment employs a configuration in which a single straight blade is alternately used to punch small (thin) seals. Specifically, in FIG. 7, by feeding the base part 3 in the feed direction at a pitch of 5 mm while punching, it is possible to punch out thin seals (in this case, for example, 110 mm x 5 mm), for example, 10 seals per shot.

[0052] [Fourth embodiment] In the fourth embodiment, a modified example of the pressure suppression hole 5 will be described below. 8 and 9 are diagrams of the elastic body 4 for explaining an example of the fourth embodiment, and are each a plan view of the elastic body 4 in which a circular pressure suppression hole 5 is formed. In particular, FIG. 8 shows an example in which a plurality of types of pressure suppression holes 5 having different sizes are provided, and FIG. 8 shows an example in which holes having two types of sizes are provided.

[0053] 8, the elastic body 4 has two types of pressure suppression holes 5: large holes 5d with a large diameter and small holes 5s with a small diameter. The large holes 5d and small holes 5s are arranged in the row direction 14 and column direction 15 such that the same holes appear at positions spaced apart from each other, such that the large holes 5d are followed by the small holes 5s and the small holes 5s are followed by the large holes 5d.

[0054] In this configuration, taking row 14 as an example, the positions of the large holes 5d in one row 14 in Fig. 8 are staggered with the positions of the large holes 5d in the vertically adjacent rows. Similarly, the positions of the small holes 5s in one column 15 in Fig. 8 are staggered with the positions of the small holes 5s in the horizontally adjacent columns.

[0055] 9 shows an embodiment in which a large number of pressure suppression holes 5 of one type are formed in the elastic body 4. The pressure suppression holes 5 of this elastic body 4 are configured as through holes with a diameter of 3φ (3 mm) formed in a staggered manner, and the opening ratio is approximately 40% (39.25%). With such an increased aperture ratio, in an elastic body 4 made of a specified material, deformation due to expansion from all directions in each part of the elastic body 4 can be absorbed by the pressure suppression holes 5. In a configuration in which circular pressure suppression holes 5 are used and they are arranged alternately in the row direction as shown in Fig. 9, the preferable range of diameter φ is 2φ or more and 20φ or less.

[0056] 10(a) to (e) are diagrams showing other configurations of the fourth embodiment of the present invention. FIG. 10(a) shows a configuration in which the pressure suppression holes 5 are arranged in the shape of an equilateral triangle, FIG. 10(b) shows a configuration in which the pressure suppression holes 5 are arranged in the shape of a regular triangle, FIG. 10(c) shows a configuration in which the regular squares are arranged in a diamond shape, FIG. 10(d) shows a configuration in which the regular hexagon is arranged, and FIG. 10(e) shows an arrangement in which circular holes having the two types of diameters mentioned above are arranged.

[0057] In this configuration, not only circular holes but also various shapes can be used around the pressure suppression holes 5 as long as they satisfy the absorbency during deformation and the restorability after compression.

[0058] In this case, the first important point in terms of providing the pressure suppression holes 5 is that, as described above, the pressure suppression holes 5 are arranged alternately in a staggered manner, and the second important point is that the shape of each pressure suppression hole 5 is such that it is substantially uniform in response to the deformation and expansion force received from the surroundings of the pressure suppression hole 5.

[0059] Regarding the second point, the pressure suppression hole 5 can be configured as a regular polygon (a polygon in which the lengths of the sides are equal and the central angles formed by the sides are equal) or a circle. Examples of regular polygons include an equilateral triangle, a square, a regular pentagon, a regular hexagon, a regular octagon, ..., and a circle as a final shape.

[0060] 11 and 12 are diagrams showing an example in which the pressure suppression hole 5 is configured to have a shape other than a regular polygon or a circle. In this case, an example is shown in which the irregularly shaped pressure suppression hole 5 is configured in the shape of a regular cross. A regular cross is a cross formed by two wide straight lines of equal length crossing at right angles. The regular cross shown in Figures 11 and 12 is an example in which a square is placed at the center, and two equal sized squares are connected to the top, bottom, left and right of the square. Since the pressure suppression hole 5 is formed by squares of the same size on the top, bottom, left and right sides, the surface cut by the punch blade 2 also has the same uniformity.

[0061] Fig. 11 shows a configuration in which the horizontal direction of the elastic body 4 coincides with the horizontal direction of the regular cross, and Fig. 12 shows a configuration in which the horizontal direction of the regular cross is tilted at an angle of 45° with respect to the horizontal direction of the elastic body 4. Even with pressure suppression holes 5 of such an irregular shape, the arrangement makes the degree of expansion and contraction per unit area uniform. In addition, although not shown, pressure suppression holes 5 having irregular shapes such as rectangles, trapezoids, and ellipses can also be used as long as they can achieve a certain degree of uniformity.

[0062] [Fifth embodiment] 13 and 14 are diagrams showing an example of the configuration of the fifth embodiment of the present invention. The fifth embodiment is an example of a punching blade die 1 for forming a punched member, and has a back plate portion 10 made of metal or the like as a base portion and a holding portion 11 made of transparent resin. A long and narrow rectangular punching blade 2 is provided in the center of the holding portion 11. An elastic body 4 having a pressure suppression hole 5 is provided inside the punching blade 2.

[0063] The elastic body 4 according to the fifth embodiment has a shape as shown in a plan view in FIG. This elastic body 4 has rectangular solid parts 17 (straight parts) and connecting parts 18 that connect the solid parts 17 so as to be continuous in one direction (the longitudinal direction in the case shown in FIG. 9). In this fifth embodiment as well, the elastic body 4 is arranged and fixed only inside the punching blade 2 by the method for arranging an elastic body for a punching blade die of the present invention.

[0064] A circular hole is provided in the center of each solid part 17 as the pressure suppression hole 5 in a plan view. Furthermore, each connecting part 18 is formed with a small vertical width due to the circular pressure suppression hole 5 and the circular cutout 19. In the configuration shown in Figs. 13 and 14, the circular cutout 19 is configured as a semicircular cutout having approximately the same diameter as the pressure suppression hole 5. The surface of the solid part 17 facing the punching blade 2 is in contact with the inner surface of the punching blade 2, but the presence of the circular cutout 19 makes it possible to prevent the punching blade 2 from being deformed even during punching.

[0065] It is preferable that the rectangular shape of the solid part 17 is a square in terms of absorbing and restoring the expansion in each direction. Also, in this embodiment, the respective shapes of a circular hole, a circular notch, and a square are included, which are substantially equivalent in terms of the function and effectiveness of the present invention. With this configuration of the elastic body 4, when forming a punching member, by providing an elastic body 4 having a shape as shown in Figure 9, even if the punching blade 2 is long and slender and the pressing force of the elastic body 4 acting on the punching blade 2 would be a problem in the conventional configuration, the configuration of this embodiment prevents the punching blade 2 from deforming, and allows for good punching processing.

[0066] Although the present invention has been described above by way of examples of the embodiments, the technical scope of the present invention is not limited to the configurations described in the above embodiments. The technical scope of the present invention should be determined based on the claims, and it goes without saying that various modifications, additions to the configuration, or improvements can be made within the scope of the claims. [Explanation of symbols]

[0067] 1: Punching blade 2: Punching blade 2a: Inner surface of punch blade 3: Base part 4: Elastic body for punching blade die (elastic body) 4A: Elastic body located inside the punching blade 4B: Elastic body located outside the punching blade 5: Pressure suppression hole 17: Individual part 18: Connection 19:Circular cutout T: Difference between the amount of protrusion of the elastic body from the base when no pressure is applied and the amount of protrusion of the punch blade from the base S1: inner area of ​​the punch blade S2: Coverage area of ​​elastic body for punching blade die

Claims

1. An elastic body for a punching blade die, which is arranged and fixed to an inner side, an outer side, or both the inner side and the outer side of a base part and a punching blade fixed to the base part, for separating an object to be punched from the punching blade, The punching blade die elastic body is an elastic body that covers the inside and outside of the punching blade and is punched by the punching blade, the punching blade die elastic body has a covering area that covers the inside and outside of the punching blade, and has a pressure suppression hole in at least a corresponding peripheral area where the punching blade is present, the pressure suppression hole suppressing an edge surface of the punching blade die elastic body from pressing the punching blade from the inside or outside, The surface of the elastic body for the punching blade die that abuts against the punching blade from the inside or outside has a smaller contact area due to the presence of the pressure suppression hole, and when the elastic body for the punching blade die is compressed in the vertical direction during punching, the pressure suppression hole in the middle deforms, thereby reducing the force applied from the inside or outside of the punching blade.

2. 2. The elastic body for a punching blade die according to claim 1, wherein the pressure suppression hole is provided on an entire surface of the elastic body for a punching blade die.

3. 3. The elastic body for a punching blade die according to claim 1, wherein the punching blade is formed in an annular shape.

4. 3. The elastic body for a punching blade die according to claim 1, wherein the punching blade is formed in a straight or curved shape other than a ring shape.

5. 3. The elastic body for a punching blade die according to claim 1, wherein an opening ratio of the pressure suppression holes in the elastic body for a punching blade die is 10% or more and 80% or less.

6. 3. The elastic body for a punching blade die according to claim 1, wherein the hardness of the elastic body for a punching blade die is 10 or more and 90 or less as measured by an Asker rubber hardness scale.

7. 3. The elastic body for a punching blade die according to claim 1, wherein the amount of protrusion of said elastic body for a punching blade die from the surface of said base portion when an object to be punched is not being pressed is greater than the amount of protrusion of said punching blade from said base portion.

8. 3. The elastic body for a punching blade die according to claim 1, wherein the pressure suppression holes are formed at an arrangement density that makes the degree of expansion and contraction of the elastic body for a punching blade die uniform.

9. 3. The elastic body for a punching blade die according to claim 1, wherein the pressure suppression hole has a shape of a regular polygon or a circle.

10. 3. The elastic body for a punching blade die according to claim 1, wherein the pressure suppression hole has a shape of a regular cross.

11. 3. The elastic body for a punching blade die according to claim 1, wherein the pressure suppression hole is composed of a plurality of types of pressure suppression holes differing in at least one of area and shape.

12. 3. The elastic body for a punching blade die according to claim 1, wherein the pressure suppression hole is a through hole.

13. 3. The elastic body for a punching blade die according to claim 1, wherein the pressure suppression holes are provided in a uniform arrangement that suppresses horizontal fluctuation of the elastic body for a punching blade die.

14. 3. The elastic body for a punching blade die as described in claim 1 or claim 2, which has a rectangular solid part and a connecting part which connects the solid parts in one direction, and a circular hole which acts as the pressure suppression hole in a planar view at the center position of each of the solid parts, and the connecting part is formed so that the width of the connecting part is narrowed by a circular notch.

15. A base part to which a punching blade is fixed; An elastic body for a punching blade die is used, The punching blade die elastic body is an elastic body that covers the inside and outside of the punching blade and is punched by the punching blade, the punching blade die elastic body has a covering area that covers the inside and outside of the punching blade, and has a pressure suppression hole that suppresses the edge surface of the punching blade die elastic body from pressing the punching blade from the inside or outside at least in a corresponding peripheral area where the punching blade is present, After the punching blade is punched out of the punching blade die elastic body, The punching blade die elastic body after punching is arranged and fixed at a required position on the inside, outside, or both the inside and outside of the punching blade, The method for arranging an elastic body for a punching blade die is characterized in that the surface of the elastic body for the punching blade die that abuts against the punching blade from the inside or outside has a smaller abutment area due to the presence of the pressure suppression hole, and when the elastic body for the punching blade die is compressed in the vertical direction during punching, the pressure suppression hole in the middle deforms, thereby reducing the force applied from the inside or outside of the punching blade.

16. A punching blade and A base portion to which the punching blade is fixed; and an elastic body for a punching blade die, The punching blade die elastic body is an elastic body that covers the inside and outside of the punching blade and is punched by the punching blade, the punching blade die elastic body has a covering area that covers the inside and outside of the punching blade, and has a pressure suppression hole that suppresses the edge surface of the punching blade die elastic body from pressing the punching blade from the inside or outside at least in a corresponding peripheral area where the punching blade is present, The punching blade die is characterized in that the surface of the elastic body for the punching blade die that abuts against the punching blade from the inside or outside has a smaller abutment area due to the presence of the pressure suppression hole, and when the elastic body for the punching blade die is compressed in the vertical direction during punching, the pressure suppression hole in the middle deforms, thereby reducing the force applied from the inside or outside of the punching blade.

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