JP6058854B1 - Punching mold - Google Patents

Abstract

There is provided a punching die capable of suppressing the deformation of a blade even when the punching of a sheet material is repeated. A punching die includes a base, a belt-like blade 312 attached to the base, a plate-like support member 41 that is attached to the base so as to cross the belt-like blade 312 and supports the belt-like blade 312. , 42. The band-shaped blade 312 has a first notch formed at the end opposite to the blade edge into the base, and formed from the opposite edge toward the blade edge. A lower end portion is fitted into the base and has a second cut formed from the upper end portion toward the lower end portion. The support members 41 and 42 support the band-shaped blade 312 by combining the first cut and the second cut. [Selection] Figure 10

Description

  The present invention relates to a punching die for cutting a sheet material used for a tray made of synthetic resin or the like.

  Synthetic resin trays, paper boxes, cardboard boxes and the like are manufactured by cutting a sheet material as a material with a punching die. The punching die has a band-shaped Thomson blade (hereinafter referred to as “band-shaped blade”) bent into a planar shape to be punched and fixed to a base. In the case of such a punching die, the strip blade is deformed by repeatedly cutting the sheet material, and as a result, cutting failure may be caused. Therefore, a technique for preventing such deformation of the belt-like blade has been conventionally proposed.

  For example, Patent Literature 1 discloses a punching die including a holding block that holds a belt-like blade. This holding block is provided at a location where a plurality of strip blades intersect, and has a groove at the top for holding the strip blades. By inserting and fixing the belt-like blade in this groove, it becomes possible to prevent the belt-like blade from being deformed.

Utility Model Registration No. 3084127

  However, in the case of the above conventional punching die, there is a problem that applicable punching dies are limited because the holding block can be provided only at a location where a plurality of strip blades intersect.

  This invention is made | formed in view of such a situation, The main objective is to provide the punching die which can solve the said subject.

In order to solve the above-described problem, a punching die according to one aspect of the present invention is attached to the base so as to intersect the base, a strip blade attached to the base, and the strip blade, A plate-like support member that supports the belt-like blade, and the belt-like blade is provided continuously with the plate-like portion having a substantially uniform thickness and the plate-like portion, and the thickness is directed toward the blade edge. Accordingly , the support member has a first blade formed with an end portion on the opposite side to the blade edge inserted into the base, and formed from the opposite end portion toward the blade edge. Has a second incision formed in the base from the upper end portion toward the lower end portion, and combining the first incision and the second incision. the support member supports the belt edge by, the said first cut the When the notch and are combined, the upper end of the support member is positioned on the plate-like portion side than the boundary between the blade portion and the plate portion.

  Moreover, the said aspect WHEREIN: It is preferable that the upper end part of the said supporting member has an inclination part inclined toward the downward direction.

  Moreover, the said aspect WHEREIN: It is preferable that the edge part of a said 1st notch is located in the edge part side on the opposite side rather than the center position of the height direction in the said strip-shaped blade.

  In the above aspect, the length of the second cut is preferably larger than the length of the first cut.

  Moreover, the said aspect WHEREIN: It is preferable that the bending part is provided in the said lower end part of the said supporting member.

  According to the punching die according to the present invention, support members can be arranged at various locations, so that a more flexible design is possible.

FIG. 3 is a plan view showing a schematic configuration of the punching die according to the first embodiment. The perspective view which shows an example of the sheet | seat material of a process target. The perspective view which shows the tray which is an example of the product after a process. The perspective view which shows the structure of the strip shaped blade which makes | forms an annular | circular shape. The perspective view which shows the structure of the strip shaped blade which makes | forms the cyclic | annular form which one part lost. The figure for demonstrating the position of the edge part of the cut provided in a strip shaped blade. Sectional drawing of the double-edged strip-shaped blade. The perspective view which shows the structure of a supporting member. The front view which shows the structure of a supporting member. The perspective view which shows the structure of a supporting member. The front view which shows the structure of a supporting member. The perspective view which shows the state with which the strip | belt-shaped blade and the supporting member were engaged. The front view which shows the structure of the modification of a supporting member. The front view which shows the structure of the modification of a supporting member. The front view which shows the structure of the modification of a supporting member. The front view which shows the structure of the modification of a supporting member. The front view which shows the structure of the modification of a supporting member. The perspective view which shows the structure of the modification of a supporting member. The front view which shows the structure of the modification of a supporting member. The perspective view which shows the structure of the modification of a supporting member. The front view which shows the structure of the modification of a supporting member. FIG. 5 is a plan view showing a schematic configuration of a punching die according to a second embodiment.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a plan view showing a schematic configuration of the punching die according to the first embodiment. The punching die 1 is configured by arranging a strip-shaped punching blade 3 on one surface of a wooden base 2. Hereinafter, the side (front side in FIG. 1) on which the punching blade 3 of the base 2 is disposed is referred to as “upper side”, and the opposite side (back side in FIG. 1) is referred to as “lower side”. Is called “rear side”, the lower side is called “front side”, the right side is called “right side”, and the left side is called “left side”.

  The surface of the base 2 is a flat surface, and a groove (not shown) having a shape to be punched by laser processing is formed on the surface, and a strip-shaped punching blade 3 is fitted into the groove, thereby punching die. 1 is configured. The punching blade 3 is fitted into the groove of the base 2 at the end opposite to the cutting edge so that the cutting edge is positioned on the front side.

  On the surface of the base 2, grooves (not shown) for plate-like support members 41 and 42 for supporting the punching blade 3 are formed by laser processing in addition to the grooves for the punching blade 3. This groove is provided so as to intersect with the groove for the punching blade 3. The support members 41 and 42 are attached to the base 2 by having their lower ends fitted into the grooves.

  FIG. 2A is a perspective view illustrating an example of a sheet material to be processed, and FIG. 2B is a perspective view illustrating a tray that is an example of a product after processing. When the punching die 1 is used, the sheet material 5 to be processed is arranged on the front side of the punching blade 3 of the punching die 1 and the sheet material 5 functions as a punching die 1 and a cutting board (not shown). Is cut and processed by being pushed out. The concave portions 51 provided in the sheet material 5 correspond to the square shapes of the punching die 1. That is, the sheet material 5 is arranged with respect to the punching die 1 so that the concave portion 51 of the sheet material 5 fits inside the square of the punching die 1, and the periphery of each concave portion 51 is cut by the punching blade 3. In this way, the tray 6 shown in FIG. 2B is created.

  As shown in FIG. 1, the punching blade 3 according to the present embodiment is arranged so as to form a plurality of quadrangles with rounded corners. Each square is a shape in which the sheet material 5 is punched, that is, the shape of the tray 6 that is a product. Thus, the punching blade 3 is arranged along the shape to be punched, and the shape is not limited to a quadrangle.

  In FIG. 1, the punching blades 3 are arranged so that five squares in the front-rear direction and six squares in the left-right direction are arranged in a matrix. Hereinafter, the punching blade 3 will be described in detail.

  The punching blade 3 is configured by arranging six blade units 31a to 31f capable of cutting a sheet material in five squares in the front-rear direction from right to left. Each blade unit 31a to 31f is composed of five strip blades 311 to 315.

  FIG. 3A is a perspective view showing the configuration of the strip blade 311, and FIG. 3B is a perspective view showing the configuration of the strip blade 312.

  Of the strip blades 311 to 315 constituting the blade units 31a to 31f, the strip blade 311 located at the rearmost side is bent into a square ring with rounded corners. Each of the other strip-shaped blades 312 to 315 is bent into a quadrangular annular shape with one side on the rear side missing. In FIG. 3B, only the configuration of the band-shaped blade 312 is shown, but the band-shaped blades 313 to 315 have the same configuration. Further, in the present embodiment, an annular belt-like blade 311 is arranged on the rearmost side of the blade units 31a to 31f, and annular belt-like blades 312 to 315 partially missing are arranged in series on the front side of the belt-like blade 311. However, the present invention is not limited to this. An annular belt-like blade 311 is arranged at a position other than both ends of a blade unit in which a plurality of belt-like blades are arranged in series, and the belt-like blades 312 to 315 partially missing on both sides of the belt-like blade 311 are arranged in series. It is also possible to adopt a configuration in which these are arranged. Also, a part of the band-shaped blade 311 may be missing in the same manner as the other band-shaped blades 312 to 315. For example, the right or left side of the belt-like blade 311 may be missing, and in that case, the missing portion may be blocked by the left-hand side portion or the right-hand side portion of the belt-like blade 311 constituting the adjacent blade unit. Good. As described above, a belt-like blade in which all the belt-like blades 311 to 315 constituting the blade units 31a to 31f are partially omitted may be used.

  In the present embodiment, the belt-like blade 312 has a quadrangular annular shape with one side missing, but two or three sides may be missing. For example, a total of two sides, one side on the rear side and one side on the front side of the belt-like blade 312 are missing, and these missing portions may be closed with the front portion of the belt-like blade 311 and the rear portion of the belt-like blade 313, respectively. Good. In addition to this, various aspects can be realized.

  The band-shaped blade 312 adjacent to the band-shaped blade 311 has its both ends 312a (refer to FIG. 3B) at the both ends 312a (refer to FIG. 3B) so as to close the rear part of the square annular portion missing with the front portion 311a (refer to FIG. 3A). Abut. Thus, a rectangular shape with rounded corners is formed by the band-shaped blade 312 and the front portion of the band-shaped blade 311. The front portion 311a of the belt-like blade 311 is a portion including a straight portion on the front side of the belt-like blade 311 having a quadrangular ring shape and arc-shaped portions at both ends thereof.

  Similarly, the belt-like blades 313 to 315 are in contact with the belt-like blades 312 to 314 at both ends so as to block the missing rear side portion of the square ring with the front portion of the belt-like blades 312 to 314 adjacent to the rear side. Is done. That is, both ends of the belt-like blade 313 are brought into contact with the front portion 312c (see FIG. 3B) of the belt-like blade 312 so as to block the rectangular missing portion of the belt-like blade 313, and both ends of the belt-like blade 314 are Both ends of the belt-like blade 315 are brought into contact with the front side portion of the belt-like blade 314 so as to close the square-like missing portion of the belt-like blade 314 so as to close the square-like missing portion. The As a result, a rectangular shape with rounded corners is formed by the strip blade 313 and the rear portion of the strip blade 312, and a square with rounded corners by the strip blade 314 and the rear portion of the strip blade 313. A shape is formed, and a rectangular shape with rounded corners is formed by the band-shaped blade 315 and the rear portion of the band-shaped blade 314.

  As shown in FIG. 3B, slit-like cuts 312b and 312b are formed in the right and left straight portions of the belt-like blade 312 in the vicinity of the boundary with the arc-shaped portions of both ends 312a and 312a, respectively. This notch 312b is for engaging the belt-like blade 312 with the support member 41 or 42. Each notch 312b is formed from the lower end of the belt-like blade 312 toward the blade edge, and its width is slightly larger than the thickness of the support members 41 and 42. Thus, since the width | variety of the notch 312b is comparable as the thickness of the supporting members 41 and 42, the intensity | strength of the strip shaped blade 312 is not impaired significantly. The band-shaped blades 313 to 315 are similarly cut. Details of the engagement structure between the belt-like blade 312 and the support members 1 and 42 will be described later.

  FIG. 4 is a view for explaining the position of the end 312d of the cut 312b provided in the belt-like blade 312. As shown in FIG. As the position of the end 312d of the cut 312b is higher, the length of the cut 312b increases, and the strength of the band-shaped blade 312 decreases. In particular, when the length of the notch 312b is more than half of the length in the height direction A of the band-shaped blade 312, the strength of the band-shaped blade 312 is not sufficient, and as a result, a cutting failure may be caused. Therefore, it is desirable that the position of the end 312d of the cut 312b is located lower than the center position in the height direction A of the strip-shaped blade 312 as shown in FIG.

  FIG. 5 is a cross-sectional view of the belt-like blade. In the present embodiment, the belt-like blades 311 to 315 are double-edged Thomson blades. That is, as shown in FIG. 5, the blade portion 301 of the band-shaped blade is inclined on both sides and is formed so as to become narrower toward the tip. The band-shaped blades 311 to 315 have the blade portions 301 inclined on both sides as described above and the plate-shaped portions 302 having a substantially uniform thickness. Reference numeral 303 indicates a ridge line between the blade portion 301 and the plate-like portion 302. Thus, although the strip | blade blades 311 thru | or 315 are comprised by the double blade in this Embodiment, a single blade may be sufficient.

Next, the support members 41 and 42 will be described in detail.
The support member 41 is a plate-like support member for supporting one belt-like blade, and the support member 42 is a plate-like support member for supporting two adjacent belt-like blades. These support members 41 and 42 are made of a material having rigidity sufficient to stably support the belt-like blade, specifically, a material such as wood, metal, or synthetic resin.

  The support member 41 is provided on the right side or the left side of one band-shaped blade and at a position where no band-shaped blade adjacent in the left-right direction exists. In the case of the present embodiment, as shown in FIG. 1, the band-shaped blades 312 to 315 related to the right side of the band-shaped blades 312 to 315 related to the blade unit 31 a located on the rightmost side and the blade unit 31 f located to the leftmost side. A support member 41 is provided on one side of the left side. On the other hand, the support member 42 is provided on one side on the left side of the band-shaped blades 312 to 315 related to the blade units 31a to 31e and one side on the right side of the band-shaped blades 312 to 315 related to the blade units 31b to 31f.

  6 and 7 are a perspective view and a front view showing the configuration of the support member 41, respectively. As shown in FIGS. 6 and 7, the support member 41 includes a straight right side 41a and a left side 41b extending in parallel to each other, a straight lower side 41c connecting the lower ends of the right side 41a and the left side 41b, a right side 41a and And an upper side 41d connecting the upper ends of the left side 41b. The upper side 41d has inclined portions 412d and 411d that are inclined from the center in the left-right direction toward the upper ends of the right side 41a and the left side 41b, respectively. A slit-shaped cut 41e is formed from the center toward the lower side 41c. The width of the cut 41e is slightly larger than the thickness of the band-shaped blades 312 to 315. In addition, the corner | angular part of the start end of the cut 41e is rounded. Thereby, as will be described later, it is possible to improve workability when combining the notch 41e of the support member 41 and the notch of the band-shaped blade.

  8 and 9 are a perspective view and a front view showing the configuration of the support member 42, respectively. As shown in FIGS. 8 and 9, the support member 42 includes a straight right side 42a and a left side 42b extending in parallel to each other, a straight lower side 42c connecting the lower ends of the right side 42a and the left side 42b, a right side 42a and a right side 42a. An upper side 42d connecting the upper ends of the left side 42b. The upper side 42d has an inclined portion 422d that is inclined slightly from the right side toward the upper end of the right side 42a from the center in the left-right direction, the inclined portion 421d that is slightly inclined from the left side toward the upper end of the left side 42b, and the inclined portions 421d and 422d. Has a straight line portion 423d. In addition, slit-shaped cuts 42e and 42e are formed from the boundary between the inclined portion 421d and the linear portion 423d and the boundary between the inclined portion 422d and the linear portion 423d toward the lower side 42c. The widths of these notches 42e and 42e are slightly larger than the thicknesses of the band-shaped blades 312 to 315. Note that the corners of the start ends of the cuts 42e and 42e are rounded. Thereby, like the case of the support member 41, workability when combining the notch 42e of the support member 42 and the notch of the band-shaped blade can be improved.

  As described above, the support member 41 has the inclined portions 411d and 412d that are inclined downward, and the support member 42 similarly has the inclined portions 421d and 422d, respectively. Thereby, it is possible to prevent the tray 6 obtained by cutting the sheet material 5 from being damaged.

  As described above, the support members 41 and 42 configured as described above are attached to the base 2 by inserting the lower end portions into the grooves formed in the base 2. Thereafter, the strip blades 311 to 315 are also attached to the base 2 in the same manner. Among these, when the belt-like blades 312 to 315 are attached to the base 2, the cut blades 312 to 315 formed on the belt-like blades 312 to 315 and the cut 41 e or the support member 42 formed on the support member 41 are formed. The cuts 42e are combined. After the cuts are combined in this way, the lower ends of the band-shaped blades 312 to 315 are fitted into the grooves formed in the base 2. As a result, the band-shaped blades 312 to 315 are attached to the base 2. Thus, the belt-like blades 312 to 315 and the support members 41 and 42 are engaged, whereby the support members 41 and 42 can support the belt-like blades 312 to 315. In addition, since the band-shaped blades 312 to 315 have cuts, the strength thereof is reduced as compared with the case where the band-shaped blades 312 to 315 have no cuts. However, when the band-shaped blades 312 to 315 are attached to the base 2, since the starting end of the cut is inserted into the base 2, the strength is not greatly impaired.

  FIG. 10 is a perspective view showing a state in which the belt-like blade 312 and the support members 41 and 42 are engaged as described above. 10, for convenience of explanation, only the band-shaped blades 311 and 312 in the blade unit 31a located on the rightmost side and the band-shaped blades 311 and 312 in the blade unit 31b adjacent to the blade unit 31a on the left side are shown. . As shown in FIG. 10, the support member 41 is engaged with the right side of the band-shaped blade 312 in the blade unit 31a. The support member 42 is engaged with the left side of the band-shaped blade 312 in the blade unit 31a and the right side of the band-shaped blade 312 in the blade unit 31b.

  When the belt-like blade 312 and the support members 41 and 42 are engaged as described above, the upper ends of the support members 41 and 42 are below the ridgeline 303 between the blade portion 301 and the plate-like portion 302. positioned. Thereby, it is possible to prevent the support members 41 and 42 from interfering when the sheet material 5 is cut. In addition, since the area | region supported by the supporting members 41 and 42 in the strip | belt-shaped blade 312 becomes large, the upper end position of these supporting members 41 and 42 is preferable. Therefore, it is most preferable that the positions of the upper ends of the support members 41 and 42 are slightly below the vicinity of the ridgeline 303 between the blade portion 301 and the plate-like portion 302. However, when the upper ends of the support members 41 and 42 are in the vicinity of the ridgeline 303, the support members 41 and 42 may interfere with the tray 6 depending on the shape of the tray 6. It is determined appropriately according to

  In the case of the present embodiment, the lengths of the cuts 41e and 42e formed in the support members 41 and 42 are larger than the lengths of the cuts 312b and the like formed in the band-shaped blades 312 to 315, respectively. Yes. Thereby, the stable support by the support members 41 and 42 is realizable, ensuring the intensity | strength of the strip blades 312 to 315.

  The manner of engagement between the band-shaped blade 312 and the support members 41 and 42 as described above is the same for the other band-shaped blades 313 to 315, and thus description thereof is omitted.

  As described above, the belt-shaped blades 312 to 315 are supported by the support members 41 and 42 by engaging the belt-shaped blades 312 to 315 and the support members 41 and 42. The belt-like blades 312 to 315 are attached to the base 2 in an unstable state as compared with the belt-like blade 311 because the straight part on one side of the rear side is missing, but are supported by the support members 41 and 42. By receiving, it becomes stable, rigidity is increased, and deformation of the blade is prevented. In the case of the present embodiment, since the support members 41 and 42 support the vicinity of the boundary with the arc-shaped portions at both ends of the straight portions on the right side and the left side, the position close to the missing portion of the belt-like blades. This will stabilize the blade and make it more difficult to deform the blade. Thus, it is preferable that the support member is disposed at a place where the belt-like blade can be in an unstable attachment state. In particular, in the case of a belt-like blade, there is a problem that it is difficult to obtain a sufficient strength against a force in the front-rear and left-right directions although it has a sufficient strength against a force in the up-down direction. For this reason, it is preferable to support the portion where the force in the front-rear and left-right directions is likely to act, by the support member. In addition, it is also possible to arrange | position the supporting members 41 and 42 not in the linear part of a strip | belt-shaped blade but in an arc-shaped part.

  When cutting the sheet material 5 is repeated when the missing rear portion of the strip blade is closed with the front portion of the strip blade provided on the rear side of the strip blade as in the present embodiment. The belt blade having the missing rear portion is deformed at the place where the belt blades are in contact with each other, and as a result, a gap may be formed between the belt blades. Since such a gap causes a cutting failure of the sheet material 5, it is preferable that such a gap can be prevented as much as possible. In the present embodiment, since the vicinity of the place where the two band-shaped blades are in contact with each other is supported by the support member, the deformation of the band-shaped blade at the position can be prevented, and the gap between the band-shaped blades can be prevented. The generation of the gap can be suppressed.

  In the present embodiment, the belt-like blade 311 is not supported by the support members 41 and 42, but may be supported in the same manner as the belt-like blades 312 to 315. Further, a part of the belt-like blades 312 to 315 may not be supported by the support members 41 and 42. In addition, the belt-like blade 311 has one belt-like blade bent into a quadrangular ring shape, and both end portions thereof are joined by welding or the like, or are not joined and the respective end surfaces are butted against each other. The joined portion or the butted portion and the vicinity thereof have no particular problem with respect to the force in the vertical direction, but the strength may not be sufficient with respect to the force in the front and rear, left and right directions. Therefore, when the support members 41 and 42 are provided for the band-shaped blade 311, a band-shaped blade is obtained by forming a cut in the vicinity of the portion of the band-shaped blade 311 and combining the cut and the cuts of the support members 41 and 42. It is preferable to engage 311 with the support members 41 and 42.

  As described above, in order to make the engagement state more stable when combining the incision of the strip blade and the incision of the support member, in order to make the engagement state more stable, the length and support of the incision of the strip blade are supported. It is preferable that the length from the lower end of the member to the cut end coincides. However, it is extremely difficult to make these lengths completely coincide with each other for reasons such as cutting accuracy and mounting accuracy. Therefore, it is assumed that there are almost no cases where these lengths do not match. In that case, when the length from the lower end portion of the support member to the cut end is larger than the cut length of the band-shaped blade, the blade edge of the band-shaped blade at the engagement position is higher than that at other positions. There can be. In this way, when the cutting edges vary, there is a problem that cutting defects are likely to occur in the case of a strip-shaped blade. Considering these points, it is preferable that the length from the lower end portion of the support member to the cut end is set to be considerably smaller (for example, about 0.5 to 2 mm) than the cut length of the band-shaped blade.

  Note that the dimensions of the sheet material are not always constant due to differences in thermal shrinkage due to differences in raw resin, variations in manufacturing conditions, and the like, and there may be errors for each manufacturing lot. When such a dimensional error of the sheet material occurs, cutting defects are likely to occur if the position of each band-shaped blade remains fixed. In view of this, it has been conventionally proposed to adjust the position of each band-shaped blade by configuring the base with a plurality of plate-like members and moving each of those plate-like members in an appropriate amount in the front-rear and left-right directions. (For example, see Registered Utility Model No. 2574388). Also in this embodiment, the position of the band-shaped blade may be adjusted by configuring the base 2 with a plurality of plate-like members or the like in the same manner. In that case, the width of the cut formed on the belt-like blade side is made considerably larger than the thickness of the support member (for example, the thickness of the support member +0.5 mm) so that the position of the belt-like blade can be adjusted. Is preferred. In this case, the end of the belt-like blade can be slid while maintaining the state where the belt-like blade and the support member are engaged, which is convenient.

  As described above, in the present embodiment, the belt-like blade and the notch formed in each of the support members are combined to engage both. Since the cutting of the band-shaped blade can be provided at an arbitrary location, the position for supporting the blade is not limited as in the prior art. Therefore, an appropriate position can be supported according to the shape and size of the blade.

[Shape of support member]
Hereinafter, modified examples of the shapes of the support members 41 and 42 will be described.
11 to 13 are front views showing modifications of the shape of the support member 41. As shown in FIG. 11, the inclined portion 411d of the upper side 41d of the support member 41 may be inclined in an arc shape. Thereby, it is possible to further prevent the tray 6 from being damaged. The inclined portion 412d may be similarly inclined in an arc shape. Also, as shown in FIG. 12, linear portions 413d and 414d may be provided between the inclined portions 411d and 412d of the upper side 41d and the notch 41e. Furthermore, as shown in FIG. 13, the upper side 41d may not be provided with an inclined portion, and may be constituted only by straight portions 413d and 414d.

14 and 15 are front views showing modifications of the shape of the support member 42. FIG. As shown in FIG. 14, the inclined portions 421d and 422d included in the upper side 42d of the support member 42 may be inclined in an arc shape. Thereby, it is possible to further prevent the tray 6 from being damaged. Only one of the inclined portions 421d and 422d may be inclined in an arc shape. Further, as shown in FIG. 15, the upper side 42d does not have an inclined portion, and may be constituted by straight portions 423d to 425d. In addition, a linear portion may be provided between the inclined portions 421d and 422d and the cuts 42e and 42e, similarly to the support member 41 shown in FIG.
Thus, various shapes can be employed for the support members 41 and 42.

  The support members 41 and 42 described above are formed of a single flat plate member, but a member bent at a predetermined angle on the front side or the rear side may be provided on at least one of the left and right sides. . For example, as shown in FIGS. 16 and 17, a configuration in which plate-like portions 41 f and 41 g that are bent approximately 90 degrees from the left and right sides of the support member 41 to the front side may be employed. In this case, as shown in FIGS. 18 and 19, the plate-like portion 41f on either one of the left and right sides (right side in FIGS. 18 and 19) may be bent substantially 90 degrees rearward. A similar configuration can be employed for the support member 42. By providing a member bent at a predetermined angle on the front side or the rear side in this way, a bent portion is provided at the lower end portion of the support member, so that the posture of the support member is stabilized. Thereby, it becomes possible to support a strip-shaped blade more stably. The support member provided with such a bent member is fitted into a groove of the base 2 formed to be bent in the same manner. At this time, since it is necessary to match the bent portion of the support member and the bent portion of the groove, there is also a merit that the mounting accuracy of the support member to the base 2 is increased.

(Embodiment 2)
In the first embodiment, the support members 41 and 42 support the vicinity of the boundary with the arc-shaped portions at both ends of the straight portions on the right side and the left side of the band-shaped blades 312 to 315. Other portions may be supported. This embodiment is an example.

  FIG. 20 is a plan view showing a schematic configuration of the punching die according to the second embodiment. As shown in FIG. 20, in the case of the present embodiment, the support members 41 and 42 are provided at two positions on the right side and the left side of the belt-like blades 311 to 315 on the front side and the rear side from the center position in the front-rear direction. It has been. Thereby, it becomes possible to firmly support the right side and the left side of each belt-like blade. In addition, it is also possible to provide support members 41 and 42 on the straight portions on one side of the front side and the rear side of each belt-like blade. In this way, it is possible to provide any number of support members 41 and 42 at any location. In the case where a plurality of support members are provided for one side of the belt-like blade as in the present embodiment, it is preferable that the support members are arranged at substantially equal intervals. Thereby, it becomes possible to support a strip-shaped blade with sufficient balance.

  The punching die of the present invention is useful as a punching die for cutting a sheet material used for a paper box, a cardboard box and the like.

DESCRIPTION OF SYMBOLS 1 Punching die 2 Base 3 Punching blade 31a-31f Blade unit 311-315 Strip | blade blade 311a Front part 312a End part 312b Cutting 312c Front part 301 Blade part 302 Plate-shaped part 303 Ridge line 41, 42 Support member 41e, 42e Cutting 411d, 412d, 421d, 422d Inclined part 5 Sheet material 6 Tray

Claims (5)

The base,
A band-shaped blade attached to the base;
A plate-like support member attached to the base so as to intersect with the belt-like blade, and supporting the belt-like blade,
The band-shaped blade has a plate-like portion having a substantially uniform thickness and a blade portion that is provided continuously to the plate-like portion and decreases in thickness toward the blade edge. The first end is inserted into the base and has a first notch formed from the opposite end toward the cutting edge,
The support member has a second notch that is inserted into the base from the lower end and is formed from the upper end toward the lower end.
The support member supports the strip blade by combining the first cut and the second cut ,
When the first cut and the second cut are combined, the upper end portion of the support member is located on the plate-like portion side with respect to the boundary between the plate-like portion and the blade portion.
Punching mold. The upper end portion of the support member has an inclined portion that is inclined downward.
The punching die according to claim 1 . The end portion of the first cut is located on the opposite end side than the center position in the height direction of the belt-like blade.
The punching die according to claim 1 or 2 . The length of the second cut is larger than the length of the first cut.
The punching die according to any one of claims 1 to 3 . A bent portion is provided at the lower end of the support member;
The punching die according to any one of claims 1 to 4 .

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