JP6911686B2 - Cutting method and cutting device - Google Patents

Description

The present invention relates to a cutting method and a cutting device.

As a related technique, Patent Document 1 discloses a cutting method for cutting a plate material by moving two knives relative to each other so as to pass each other.

Japanese Unexamined Patent Publication No. 2006-231425

By the way, since the bent portion of the material to be cut, that is, the ridgeline portion has high rigidity, a large load is applied to the tool when the ridgeline portion is cut by shearing. However, in the above technique, cutting the ridgeline portion of the material to be cut is not considered.

Generally, in order to prevent a large load from being applied to the tool, the material to be cut without a shape, that is, the material to be cut is cut with no ridge line formed, and then press working or the like. The ridgeline portion is formed by molding. However, when manufacturing small parts, it is disadvantageous in terms of productivity to cut the blanks into small pieces in advance and press each cut blank.

In consideration of the above facts, an object of the present disclosure is to provide a cutting method and a cutting device in which a load on a tool is small when cutting a ridgeline portion of a material to be cut.

The gist of the present invention is as follows.

-Cut method (1)-
Made of one plate material,
A part of the top plate portion of the material to be cut, which is located between the top plate portion, the vertical wall portion, and the top plate portion and the vertical wall portion, and has a ridgeline portion in which the plate material is bent. The process of restraining from both sides over the entire width,
In the restrained state, a step of inserting a knife from the inside of the material to be cut into a part of the boundary of the top plate portion to generate a cut end in the top plate portion.
Further, a step of inserting a knife into the top plate portion, widening the cut end toward the ridge line portion, and cutting the ridge line portion.
A cutting method comprising.

-Cut method (2)-
In the restraining step, a part of the ridgeline portion is also restrained from both sides.
The cutting method according to (1).

-Cut method (3)-
In the restraining step, the edge of the restraining portion of the outer surface of the material to be cut is also a knife.
The cutting method according to (1) or (2).

-Cut method (4)-
In the step of cutting the ridgeline portion, the knife is also inserted into a part of the boundary of the ridgeline portion from the inside of the material to be cut.
The cutting method according to any one of (1) to (3).

-Cut method (5)-
The vertical wall portion of the material to be cut from which the ridgeline portion has been cut is cut.
The cutting method according to any one of (1) to (4).

-Cutting device (1-1)-
First plate holding surface and
The second plate holding surface formed on one side or both sides of the first plate holding surface,
A convex angle portion formed between the first plate holding surface and the second plate holding surface, which is a convexly curved surface,
The first plate pressing surface, the second plate pressing surface, and the side surface of the pressing member formed adjacent to the convex angle portion,
With an inner holding member equipped with
The first plate receiving surface, which is arranged to face the first plate holding surface,
A second plate receiving surface formed on one side or both sides of the first plate receiving surface and arranged to face the second plate holding surface.
A concavely curved surface formed between the first plate receiving surface and the second plate receiving surface, and a concave angle portion arranged to face the convex angle portion.
The side surface of the concave blade, which is arranged so as to be substantially flush with the side surface of the holding member,
A concave blade knife composed of a concave blade first knife formed by the first plate receiving surface and the concave blade side surface, and a concave blade second knife formed by the concave corner portion and the concave blade side surface.
With a concave blade,
It is movable with respect to the concave blade and
A convex blade equipped with a convex blade knife that passes by the concave blade knife due to the movement,
It is a cutting device equipped with
The convex blade knife passes only the concave blade first knife among the concave blade knives.
Cutting device.

-Cutting device (1-2)-
First plate holding surface and
The second plate holding surface formed on one side or both sides of the first plate holding surface,
A convex angle portion formed between the first plate holding surface and the second plate holding surface, which is a convexly curved surface,
The first plate pressing surface, the second plate pressing surface, and the side surface of the pressing member formed adjacent to the convex angle portion,
With an inner holding member equipped with
The first plate receiving surface, which is arranged to face the first plate holding surface,
A second plate receiving surface formed on one side or both sides of the first plate receiving surface and arranged to face the second plate holding surface.
A concavely curved surface formed between the first plate receiving surface and the second plate receiving surface, and a concave angle portion arranged to face the convex angle portion.
The side surface of the concave blade, which is arranged so as to be substantially flush with the side surface of the holding member,
A concave blade knife composed of a concave blade first knife formed by the first plate receiving surface and the concave blade side surface, and a concave blade second knife formed by the concave corner portion and the concave blade side surface.
With a concave blade,
It is movable with respect to the concave blade and
A convex blade equipped with a convex blade knife that passes by the concave blade knife due to the movement,
It is a cutting device equipped with
The convex blade knife passes both the concave blade first knife and the concave blade second knife among the concave blade knives.
At the time of cutting, the convex blade knife is configured to pass the concave blade second knife after passing the concave blade first knife.
Cutting device.

-Cutting device (2-1)-
First plate holding surface and
The second plate holding surface formed on both sides of the first plate holding surface and
A convex angle portion formed between the first plate holding surface and the second plate holding surface, which is a convexly curved surface,
The first plate pressing surface, the second plate pressing surface, and the side surface of the pressing member formed adjacent to the convex angle portion,
With an inner holding member equipped with
The first plate receiving surface, which is arranged to face the first plate holding surface,
A pair of second plate receiving surfaces formed on both sides of the first plate receiving surface and arranged to face the second plate holding surface.
A pair of concave corner portions that are concavely curved surfaces formed between the first plate receiving surface and the second plate receiving surface and are arranged so as to face the convex corner portions.
The side surface of the concave blade, which is arranged so as to be substantially flush with the side surface of the holding member,
A concave blade knife composed of a concave blade first knife formed by the first plate receiving surface and the concave blade side surface, and a concave blade second knife formed by the concave corner portion and the concave blade side surface.
With a concave blade,
The inner pressing member is arranged adjacent to the side surface side of the pressing member, and is provided so as to move between the pair of second plate receiving surfaces in a direction parallel to the side surface of the pressing member.
The first side surface of the convex blade, which is arranged to face the side surface of the holding member,
The second side surface of the convex blade formed on both sides of the first side surface of the convex blade,
A convex blade main plate contact surface that is arranged parallel to the first plate receiving surface and has the same width as or narrower than the width of the first plate receiving surface.
A convex blade main knife formed by the first side surface of the convex blade and the contact surface of the convex blade main plate,
With a convex blade,
A cutting device equipped with.

-Cutting device (2-2)-
The convex blade
A convex blade sub-plate contact surface formed between the convex blade main plate contact surface and the convex blade second side surface and forming a convex shape in the cutting moving direction of the convex blade.
A convex blade sub-knife formed by the first side surface of the convex blade and the contact surface of the convex blade sub-plate,
Is further equipped,
The cutting device according to (2-1).

-Cutting device (3-1)-
First plate holding surface and
The second plate holding surface formed on one side or both sides of the first plate holding surface,
A convex angle portion formed between the first plate holding surface and the second plate holding surface, which is a convexly curved surface,
The first plate pressing surface, the second plate pressing surface, and the side surface of the pressing member formed adjacent to the convex angle portion,
With an inner holding member equipped with
The first plate receiving surface, which is arranged to face the first plate holding surface,
A second plate receiving surface formed on one side or both sides of the first plate receiving surface and arranged to face the second plate holding surface.
A concavely curved surface formed between the first plate receiving surface and the second plate receiving surface, and a concave angle portion arranged to face the convex angle portion.
The side surface of the concave blade, which is arranged so as to be substantially flush with the side surface of the holding member,
A concave blade knife composed of a concave blade first knife formed by the first plate receiving surface and the concave blade side surface, and a concave blade second knife formed by the concave corner portion and the concave blade side surface.
With a concave blade,
It is provided so as to move in a direction perpendicular to the first plate receiving surface of the concave blade from a position adjacent to the inner holding member to a position adjacent to the concave blade.
Of the concave blade knives, a convex blade having a convex blade main knife formed at a position passing only the concave blade first knife, and
A cutting device equipped with.

-Cutting device (3-2)-
The convex blade
A convex blade sub-knife formed on the outside in the extending direction of the convex blade main knife and at a position retracted with respect to the moving direction at the time of cutting is further provided.
The cutting device according to (3-1).

-Cutting device (3-3)-
The convex blade sub-knife is
It is continuously provided from the convex blade main knife, and extends in an inclined direction in a backward direction in the moving direction at the time of cutting as the distance from the convex blade main knife increases.
The cutting device according to (3-2).

-Cutting device (3-4)-
The convex blade sub-knife is configured so that at least a part of the convex blade sub-knife passes the concave blade second knife.
The cutting device according to (3-2) or (3-3).

-Cutting device (3-5)-
There are two each of the second plate receiving surface, the concave corner portion, the concave blade second knife, and the convex corner portion.
The cutting device according to any one of (3-1) to (3-4).

-Cutting device (3-6)-
The width of the convex blade main knife is the same as the width of the concave blade first knife.
(3-5) Cutting device.

According to the cutting method and cutting device of the present disclosure, the load on the tool can be reduced.

It is a perspective view which shows the state which the material to be cut is set in the cutting apparatus of embodiment. It is a front view which looked at the state of FIG. 1 from the front of the apparatus. It is a perspective view which shows the state before the material to be cut is set. FIG. 3 is a front view of the state of FIG. 3 as viewed from the front of the device. It is a perspective view which shows the state which cut the concave blade of an embodiment in the plane perpendicular to the device width direction. It is an enlarged side view which shows the relationship between a concave-blade knife and a convex-blade knife. It is a front view which shows the relationship between a concave blade and a convex blade, specifically, which part of the concave blade the convex blade passes by. It is a front view which shows that the convex blade of an embodiment is configured to pass a concave blade second knife after passing by a concave blade first knife. A state in which the convex blade main knife has entered the top plate portion of the material to be cut is shown, (A) is a front view, and (B) is an enlarged view of the top plate portion viewed from the width direction of the device. (A) is a perspective view showing a material to be cut before cutting, and (B) is a perspective view showing a material to be cut after cutting. (A) is a perspective view of the material to be cut before cutting from a different angle from FIG. 10 (A), and (B) is a perspective view showing the material to be cut after the first step and before the second step. be. It is a front view which shows the convex blade of the modification 1 together with the concave blade. It is a front view which shows the convex blade of the modification 2 together with the concave blade. It is a front view which shows the convex blade of the modification 3 together with the concave blade. It is a front view which shows the convex blade of the comparative example together with the concave blade.

Hereinafter, embodiments of the present invention will be described.

[Material to be cut before cutting]
10 (A) and 11 (A) show the material to be cut 90 before cutting (hereinafter, when simply referred to as "material 90 to be cut", it means the material 90 before cutting). ..
The material to be cut 90 has a substantially U-shaped cross section (substantially U-shaped cross section). Specifically, the material to be cut 90 is formed from a flat top plate portion 90A, a pair of ridge line portions 90B located on both sides of the top plate portion 90A in the width direction (W direction), and a pair of ridge line portions 90B to the top. It includes a pair of flat plate-shaped vertical wall portions 90C extending toward one side (arrow A side) of the plate portion 90A in the plate thickness direction.
Hereinafter, the surface of the material 90 to be cut on one side in the plate thickness direction (the surface inside the cross section) is referred to as an inner surface, and the surface on the other side in the plate thickness direction (the surface outside the cross section) is referred to as an outer surface.

In the present embodiment, the top plate portion 90A and the pair of vertical wall portions 90C are both flat plates. The top plate portion 90A and the vertical wall portion 90C have a substantially vertical relationship. Further, the pair of vertical wall portions 90C are in a substantially parallel relationship with each other. On the other hand, the ridge line portion 90B has a curved shape connecting the top plate portion 90A and the vertical wall portion 90C.

The material to be cut 90 can be obtained, for example, by pressing one plate material. The plate material is, for example, a metal plate such as steel, copper, or aluminum. The plate thickness is, for example, about 1.0 to 4.0 mm.

(Scheduled cutting line 95)
In the cutting method of the present embodiment, the material to be cut 90 is cut along the planned cutting line 95 shown by the broken line in FIGS. 10 (A) and 11 (A), and the covered material after cutting shown in FIG. 10 (B). A cutting material 90P is obtained. The planned cutting line 95 straddles all of the top plate portion 90A, the pair of ridge line portions 90B, and the pair of vertical wall portions 90C. That is, in the cutting method of the present embodiment, cutting is performed across the ridge line portion 90B.

In the following, of the material 90 to be cut, one side (arrow Rr side) of the planned cutting line 95 is referred to as a product side 90P, and the other side (arrow Fr side) is referred to as a trim side 90Q.
Further, of the planned cutting line 95, the portion crossing the top plate portion 90A is referred to as the planned top plate cutting line 95A, the portion crossing the ridge line portion 90B is referred to as the planned cutting line 95B, and the portion on the vertical wall portion 90C. Is called the planned vertical wall cutting line 95C.

[Material to be cut after cutting]
FIG. 10B shows the material to be cut 90P after cutting. The material to be cut 90P after cutting is the product side 90P of the material 90 to be cut which is separated into two as a result of cutting the material 90 to be cut along the planned cutting line 95. For convenience, the same reference numeral 90P is used for the material to be cut 90P after cutting and the product side 90P of the material 90 to be cut.
The material to be cut 90P after cutting is used as a part of an automobile undercarriage component such as a lower arm of an automobile suspension.

[Overview of cutting method]
The cutting method of the present embodiment is a method of cutting the material to be cut 90 along the planned cutting line 95 by the first step and the second step performed after the first step.
In the first step, the top plate portion 90A and the ridge line portion 90B are cut along the planned top plate cutting line 95A and the planned ridge line cutting line 95B. Specifically, the material to be cut 90 shown in FIG. 11A is brought into the state shown in FIG. 11B.
In the second step, the vertical wall portion 90C of the material to be cut 90 shown in FIG. 11B is cut along the planned vertical wall cutting line 95C.

The specific method for cutting the vertical wall portion 90C in the second step is not particularly limited, and may be, for example, cutting by shearing using two dies, or cutting by laser. It may be used, or other cutting methods may be used.
Hereinafter, the first step will be described in detail.

[Cutting device used in the first process]
Next, the cutting device 10 used in the first step of the cutting method of the present embodiment will be described with reference to FIGS. 1 to 8.

In the following description, the arrow W shown in each figure is the device width direction of the cutting device 10, the arrow UP is the device vertical direction upper side of the cutting device 10, and the arrow Fr is the device front-rear direction front of the cutting device 10. Further, in FIGS. 2, 4, 7, 8 and the like, the direction perpendicular to the paper surface and on the front side coincides with the front side of the cutting device 10 in the front-rear direction.

The vertical and downward directions of the device coincide with the moving direction of the convex blade 40 at the time of cutting (the approach direction of the convex blade knife 45), which will be described later. That is, the vertical direction of the device is the moving direction of the convex blade 40. The device width direction is the extending direction of the concave blade knife 25, which will be described later, in a plane perpendicular to the device vertical direction. The device front-rear direction is a direction perpendicular to both the device vertical direction and the device width direction.

<Overall configuration>
As shown in FIG. 1, the cutting device 10 of the present embodiment includes a concave blade 20, an inner pressing member 30, and a convex blade 40.

<Concave blade 20>
(Plate receiving surface 23)
FIG. 5 shows a cross-sectional perspective view of the concave blade 20 cut in a plane perpendicular to the width direction of the device.
As shown in FIG. 5, the concave blade 20 includes a plate receiving surface 23 for arranging the material to be cut 90 (see also FIGS. 3 and 4 as appropriate).
The plate receiving surface 23 may be described as a state shown in FIGS. 1 and 2, that is, a state in which the material to be cut 90 is restrained from both sides (inner surface and outer surface) by the concave blade 20 and the inner pressing member 30 (hereinafter, referred to as a restrained state). At), it comes into contact with the outer surface of the material to be cut 90.

The plate receiving surface 23 includes a first plate receiving surface 23A that contacts the outer surface of the top plate portion 90A, a concave corner portion 23B that contacts the outer surface of the ridge line portion 90B, and a second plate receiving surface that contacts the outer surface of the vertical wall portion 90C. It is composed of 23C.

The first plate receiving surface 23A is a surface that the outer surface of the top plate portion 90A comes into contact with, and in the present embodiment, it is a flat surface with the normal direction directed upward from the device.
The second plate receiving surface 23C is a surface that the outer surface of the vertical wall portion 90C contacts, and in the present embodiment, it is a flat surface whose normal direction is directed inward in the device width direction. The second plate receiving surfaces 23C are provided on both sides in the width direction of the device. That is, a pair of second plate receiving surfaces 23C are provided. Further, the second plate receiving surface 23C is located on both outer sides of the first plate receiving surface 23 in the device width direction.
The concave angle portion 23B is a surface that the outer surface of the ridge line portion 90B comes into contact with. In the present embodiment, the concave corner portions 23B are provided on both sides in the device width direction. That is, a pair of concave corner portions 23B is provided. Further, the concave corner portion 23B is a curved surface (concave curved surface) that smoothly connects the first plate receiving surface 23A and the second plate receiving surface 23C.

A concave blade side surface 24 is formed so as to extend downward in the vertical direction of the device from the front ends of the first plate receiving surface 23A and the concave angle portion 23B in the front-rear direction of the device.

(Concave blade knife)
A concave blade knife 25 is formed at a boundary portion between the first plate receiving surface 23A and the concave corner portion 23B and the concave blade side surface 24. Of the concave blade knife 25, the portion formed at the front end of the first plate receiving surface 23A in the front-rear direction of the device is the concave blade first knife 25A. Of the concave blade knife 25, the portion formed at the front end of the concave corner portion 23B in the front-rear direction of the device is the concave blade second knife 25B.

The concave blade first knife 25A contacts the outer surface of the top plate portion 90A along the planned cutting line 95A of the top plate in a restrained state. The concave blade second knife 25B contacts the outer surface of the ridge line portion 90B along the planned ridge line cutting line 95B in a restrained state.

Of the plate receiving surfaces 23, the first plate receiving surface 23A and the concave corner portion 23B come into contact with each other on the product side 90P, which is a part of the material to be cut 90. On the other hand, the first plate receiving surface 23A and the concave angle portion 23B do not come into contact with the trim side portion 90Q of the material to be cut 90.

Of the plate receiving surfaces 23, the second plate receiving surface 23C is provided so as to project forward of the device from the concave blade knife 25. That is, the alternate long and short dash line in FIG. 5 is a virtual line in which the concave blade knife 25 is extended outward in the extending direction, and the second plate receiving surface 23C projects toward the front side of the device from this virtual line. As a result, as shown in FIG. 1, the second plate receiving surface 23C contacts not only the product side 90P but also the outer surface of the vertical wall 90C of the trim side 90Q.

The concave blade 20 can also be grasped as follows.
That is, the concave blade 20 includes a concave blade main body 21 at the center in the device width direction and a pair of concave blade side portions 22 on the outer side in the device width direction of the concave blade main body 21. The concave blade main body 21 includes a first plate receiving surface 23A, a concave corner portion 23B, a concave blade knife 25, and a concave blade side surface 24. On the other hand, the concave blade side portion 22 is configured to include the second plate receiving surface 23C.

<Inner holding member 30>
As shown in FIGS. 1 and 2, the inner pressing member 30 is a member for restraining the material to be cut 90 arranged on the concave blade 20.

(Plate holding surface 33)
As shown in FIGS. 3 and 4, the inner pressing member 30 includes a plate pressing surface 33 that contacts the inner surface of the material to be cut 90. The plate pressing surface 33 is composed of a first plate pressing surface 33A that contacts the top plate portion 90A, a second plate pressing surface 33C that contacts the vertical wall portion 90C, and a convex angle portion 33B that contacts the ridgeline portion 90B. Has been done.

The first plate holding surface 33A is a surface that contacts the inner surface of the top plate portion 90A of the product side portion 90P, and is a flat surface in the present embodiment. The first plate holding surface 33A is arranged so as to face the first plate receiving surface 23A. The first plate holding surface 33A and the first plate receiving surface 23A are restrained with the top plate portion 90A sandwiched between them.

The second plate holding surface 33C is a surface that contacts the inner surface of the vertical wall portion 90C of the product side portion 90P. The second plate holding surface 33C is a flat surface in the present embodiment. The second plate holding surface 33C has a relationship substantially perpendicular to the first plate holding surface 33A. The second plate holding surfaces 33C are provided on both sides in the device width direction. That is, a pair of second plate holding surfaces 33C are provided. The second plate holding surface 33C is arranged so as to face the second plate receiving surface 23C. The second plate holding surface 33C and the second plate receiving surface 23C are restrained with a vertical wall portion 90C sandwiched between them.

The convex angle portion 33B is a surface that contacts the inner surface of the ridge line portion 90B of the product side portion 90P. The convex angle portion 33B is provided between the first plate holding surface 33A and the second plate holding surface 33C. In the present embodiment, the convex angle portion 33B is a curved surface that smoothly connects the first plate pressing surface 33A and the second plate pressing surface 33C. The convex angle portion 33B is arranged so as to face the concave angle portion 23B. The convex angle portion 33B and the concave angle portion 23B are restrained with the ridge line portion 90B sandwiched between them.

The inner pressing member 30 presses the product side 90P up to the vicinity of the planned cutting line 95. In order to do so, the end portion of the first plate holding surface 33A on the front side of the device has a shape along the planned cutting line 95A of the top plate. Further, the end portion of the convex angle portion 33B on the front side of the device has a shape along the planned ridge line cutting line 95B.

(Side side of holding member)
On the front side of the device of the inner pressing member 30, there is a pressing member side surface 34.
The pressing member side surface 34 extends upward in the vertical direction of the device from the end of the first plate pressing surface 33A on the front side of the device and the end of the convex angle portion 33B on the front side of the device.
As a result, in a plan view (viewed from above the device), the planned cutting line 95A of the top plate and the planned cutting line 95B of the ridge line of the set material 90 to be cut are not hidden by the inner pressing member 30. As a result, even when the first plate holding surface 33A and the convex angle portion 33B hold down the top plate cutting planned line 95A and the ridge line cutting scheduled line 95B of the product side 90P, the convex blade 40, which will be described later, moves. It is not hindered by the inner holding member 30.

<Convex blade 40>
The convex blade 40 is configured to be movable with respect to the concave blade 20 and the inner pressing member 30. That is, the convex blade 40 is movable with respect to the material to be cut 90 restrained by the concave blade 20 and the inner pressing member 30.
When the convex blade 40 cuts the material to be cut 90, the convex blade 40 moves in the vertical direction of the device from the upper side of the device to the lower side of the device by the moving device 100 shown in FIG.

As shown in FIG. 6, the convex blade 40 includes a convex blade knife 45. When cutting the material to be cut 90, the convex blade knife 45 passes by the concave blade knife 25 due to the movement of the convex blade 40. The clearance between the concave blade knife 25 and the convex blade knife 45 depends on the material of the material to be cut 90, but is preferably about 7 to 25% of the plate thickness of the material to be cut 90. At the portion where the convex blade knife 45 and the concave blade knife 25 pass each other, the material to be cut 90 is sheared.

(Convex blade knife: main knife, sub knife)
As shown in FIG. 7, the convex blade knife 45 is composed of a convex blade main knife 45M and a convex blade sub knife 45S.

The convex blade main knife 45M is formed in the central portion of the convex blade knife 45 in the width direction of the device. The convex blade main knife 45M extends linearly, and its extending direction is parallel to the device width direction. As a result, the entire convex blade main knife 45M enters the material to be cut 90 at substantially the same time.

The convex blade sub-knife 45S is formed on both sides of the convex blade main knife 45M on the outer side in the device width direction. In the example of FIG. 7, the convex blade sub-knife 45S extends in a straight line, and the extending direction thereof is a direction in which the convex blade sub-knife 45S is inclined upward in the device width direction toward the outside. In other words, the convex blade sub-knife 45S recedes in the cutting moving direction toward the outside in the device width direction. The convex blade sub-knife 45S is formed continuously with the convex blade main knife 45M.

As shown in FIG. 6, the convex blade knife 45 is formed at a boundary portion between the convex blade first side surface 44 facing the rear side of the device and the convex blade plate contact surface 43 facing the lower side of the device.

The convex blade first side surface 44 is a surface of the inner pressing member 30 facing the pressing member side surface 34, and extends in the vertical direction of the device.

The convex blade plate contact surface 43 extends from the lower end of the convex blade first side surface 44 toward the front of the device. The convex blade plate contact surface 43 is a surface that contacts the trim side portion 90Q of the material to be cut 90.
Specifically, the convex blade plate contact surface 43 is composed of a convex blade main plate contact surface 43M and a convex blade sub plate contact surface 43S on both sides of the convex blade main plate contact surface 43M in the device width direction. There is. The convex blade main plate contact surface 43M is a surface substantially parallel to the first plate receiving surface 23A. That is, the normal direction of the convex blade main plate contact surface 43M is below the device. On the other hand, the convex blade sub-plate contact surface 43S is a surface different from the convex blade main plate contact surface 43M. The boundary between the convex blade sub-plate contact surface 43S and the convex blade main plate contact surface 43M forms a convex shape substantially downward of the device.
The convex blade main knife 45M is formed at the boundary between the convex blade first side surface 44 and the convex blade main plate contact surface 43M, and the convex blade sub knife 45S is formed between the convex blade first side surface 44 and the convex blade sub plate. It is formed at the boundary portion with the contact surface 43S.
The convex blade knife 45 of the present embodiment is a knife having a cutting edge angle of 90 degrees, but the cutting edge angle of the convex blade knife 45 allows a slightly acute angle such as 88 degrees or 89 degrees. That is, the normal direction of the convex blade main plate contact surface 43M may be deviated by about 0 to 2 ° from the lower side of the device toward the front of the device.

Further, the convex blade 40 includes convex blade second side surfaces 46 on both sides (both sides in the device width direction) of the convex blade first side surface 44. Both of the normals of the second side surface 46 of the convex blade are directed outward in the width direction of the device. There is a convex blade sub-plate contact surface 43S between the convex blade second side surface 46 and the convex blade main plate contact surface 43M.

The convex blade 40 moves between the second plate receiving surfaces 23C. As shown in FIG. 7, the entire convex blade knife 45 not only passes the entire concave blade first knife 25A, but also moves in a position where it passes a part of the concave blade second knife 25B on both sides in the width direction. Therefore, the convex blade knife 45 passes by both the concave blade first knife 25A and the concave blade second knife 25B among the concave blade knives 25.

In FIG. 7, the convex blade main knife 45M has a shape that does not pass a part of the concave blade first knife 25A and does not pass the concave blade second knife 25B. The length of the convex blade main knife 45 in the device width direction is shorter than the length of the concave blade first knife 25A in the device width direction.
Specifically, when the convex blade 40 moves downward from the position shown in FIG. 7, the convex blade main knife 45M passes by the portion of the concave blade knife 25 having the reference numeral 25M in FIG. 7. The convex blade sub-knife 45S passes each other in the portion of the concave blade knife 25 having the reference numeral 25S. Then, as shown in FIG. 7, the width of the portion 25M of the concave blade knife 25 through which the convex blade main knife 45M passes is inside the concave blade first knife 25A in the device width direction. Therefore, the convex blade main knife 45M does not pass a part of the concave blade first knife 25A and does not pass the concave blade second knife 25B.

(Knife position)
The position of the knife in the device width direction will be described. In the following description, the width means both the size in the width direction and the position in the width direction, unless the size of the width or the position of the width is described. The width of the convex blade knife 45 in the device width direction (hereinafter, referred to as “width of the convex blade knife 45” or the like) is outside the width of the concave blade first knife 25A. Further, the width of the convex blade main knife 45M is inside the width of the concave blade first knife 25A.

The width of the convex blade main knife 45M may be the same as the width of the concave blade first knife 25A, and the convex blade main knife 45M may be configured to pass all of the concave blade first knife 25A.

Next, with reference to FIG. 8, the relationship between the timing at which the convex blade knife 45 passes the concave blade first knife 25A and the timing at which the convex blade knife 45 passes the concave blade second knife 25B will be described.

The alternate long and short dash line in FIG. 8 indicates the position of the convex blade 40 moving with respect to the concave blade 20 at a certain moment. At this moment, the convex blade knife 45 has already passed the concave blade first knife 25A, but has not yet passed the concave blade second knife 25B. That is, the convex blade knife 45 of the present embodiment is configured to pass the concave blade first knife 25A and then pass the concave blade second knife 25B.

To give another explanation, in the state shown by the alternate long and short dash line in FIG. 8, the convex blade 40 is moved, and the boundary between the concave blade first knife 25A and the concave blade second knife 25B is at the same width as the boundary. It is a state in which the positions of the convex blade knife 45 and the tip of the convex blade knife 45 are overlapped with each other. In this state, focusing on each device width direction, the portion of the concave blade first knife 25A adjacent to the boundary is located at a position retracted from the convex blade knife 45 with respect to the moving direction of the convex blade 40 during cutting (device). The portion of the concave blade second knife 25B that is located above the vertical direction and is adjacent to the boundary is a position that is ahead of the convex blade knife 45 in the cutting movement direction of the convex blade 40 (device vertical direction). It is located below).

When the part of the convex blade knife 45 that passes the concave blade first knife 25A is defined as the "convex blade first knife" and the part that passes the concave blade second knife 25B is defined as the "convex blade second knife", this It can be said that the convex blade knife 45 of the embodiment is configured as follows.
That is, the convex blade knife 45 is composed of a convex blade first knife and a convex blade second knife. Then, in the convex blade first knife and the convex blade second knife, the concave blade second knife 25B and the convex blade second knife are placed after the concave blade first knife 25A and the convex blade first knife pass each other at the time of cutting. It is configured to pass each other.

[How to use the cutting device]
Next, a method of using the cutting device 10, that is, a first step of the cutting method will be described.

(1. Set the material to be cut)
First, the material to be cut 90 is set.
Specifically, the material to be cut 90 is arranged on the plate receiving surface 23 of the concave blade 20, and the material 90 to be cut is sandwiched and restrained between the concave blade 20 and the inner pressing member 30.

The state in which the material to be cut 90 is set will be specifically described below.

The concave blade knife 25 is in contact with the outer surfaces of the top plate portion 90A and the ridge line portion 90B of the material to be cut 90.
Specifically, the concave blade first knife 25A is in contact with the outer surface of the top plate portion 90A of the material to be cut 90 along the planned cutting line 95A of the top plate. The concave blade second knife 25B is in contact with the outer surface of the ridge line portion 90B of the material to be cut 90 along the planned ridge line cutting line 95B.

The top plate 90A of the product side 90P of the material 90 to be cut is restrained from both sides.
Specifically, the first plate receiving surface 23A of the concave blade 20 is in contact with the outer surface of the top plate portion 90A of the product side portion 90P of the material to be cut 90, and the first plate pressing surface 33A of the inner pressing member 30. Is in contact with the inner surface of the top plate 90A of the product side 90P of the material 90 to be cut.

The ridge line portion 90B of the product side portion 90P of the material to be cut 90 is restrained from both sides.
Specifically, the concave corner portion 23B of the concave blade 20 is in contact with the outer surface of the ridge line portion 90B of the product side portion 90P of the cut material 90, and the convex corner portion 33B of the inner pressing member 30 is the cut material 90. It is in contact with the inner surface of the ridge line portion 90B of the product side portion 90P.

Of the product side 90P, the top plate 90A and the ridge line 90B are constrained to the vicinity of the planned cutting line 95 (the planned cutting line 95A and the planned ridge line 95B).
Specifically, the pressing member side surface 34 of the inner pressing member 30 is arranged so as to be flush with the concave blade side surface 24. The term "neighborhood" as used herein means a position as close as possible to the planned cutting line 95 as long as the movement of the convex blade 40 and the shearing process by the concave blade 20 and the convex blade 40 are not hindered.

The vertical wall portion 90C of the product side portion 90P of the material to be cut 90 is restrained from both sides.
Specifically, the second plate receiving surface 23C of the concave blade 20 is in contact with the outer surface of the vertical wall portion 90C of the product side portion 90P of the material to be cut 90, and the second plate pressing surface 33C of the inner pressing member 30. Is in contact with the inner surface of the vertical wall portion 90C of the product side portion 90P of the material to be cut 90.

(2. Move the convex blade)
Next, the convex blade 40 is moved.
When the convex blade 40 is moved, as shown in FIG. 9A, the convex blade main knife 45M enters the top plate portion 90A of the material to be cut 90.

Then, as shown in FIG. 9B, a cut (crack) is generated in the top plate portion 90A along the planned cutting line 95A of the top plate.

When the convex blade 40 further moves downward from this state, the top plate portion 90A of the trim side portion 90Q where the convex blade main contact surface 43M of the convex blade 40 hits becomes the top plate portion 90A of the restrained product side portion 90P. Be separated.

When the top plate portion 90A of the separated trim side portion 90Q is displaced downward to the device, the cut end generated in the top plate portion 90A expands toward the ridgeline portion. In particular, as the top plate 90A of the separated trim side 90Q is displaced downward from the device, the material 90 to be cut has a tension in the direction along the planned cutting line 95 (see arrow T in FIG. 9A). ) Occurs. Therefore, the cut end tends to spread toward the ridgeline portion 90B. When the cut end reaches the ridge line portion 90B, the ridge line portion 90B is cut.
In this case, since the ridgeline portion 90B is cut without the convex blade knife 45 coming into contact with the ridgeline portion 90B, the load applied to the tool (convex blade 40) is small.

Further, before the cut end generated in the top plate portion 90A reaches the ridge line portion 90B, the convex blade knife 45 (convex blade sub knife 45S) passes by the concave blade second knife 25B, and the ridge line portion 90B becomes the planned ridge line cutting line 95B. It may be sheared along.
Even in this case, since the shearing process is performed with the tension T applied to the ridge line portion 90B, the load applied to the convex blade knife 45 (convex blade sub knife 45S) and the concave blade second knife 25B is relatively reduced. There is. That is, the load on the tool is small.

[Modification example]
In the above embodiment, the cutting device 10 including the convex blade 40 shown in FIG. 8 has been described, but the present invention is not limited thereto.
The convex blade provided in the cutting device may be, for example, the convex blades 50, 60, 70 of the modified examples 1 to 3 described below.

-Modification example 1-
FIG. 12 shows the convex blade 50 of the modified example 1 together with the concave blade 20.

The convex blade 50 includes a convex blade knife 55 that passes by the concave blade knife 25. The width of the convex blade knife 55 is outside the concave blade first knife 25A. As a result, the convex blade knife 55 is configured to pass not only the concave blade first knife 25A but also the concave blade second knife 25B. Therefore, the convex blade knife 55 passes by both the concave blade first knife 25A and the concave blade second knife 25B among the concave blade knives 25.

The convex blade knife 55 includes a convex blade main knife 55M at the center in the device width direction and a pair of convex blade sub knives 55S on the outer side in the device width direction. Both the convex blade main knife 55M and the convex blade sub knife 55S extend parallel to the device width direction. The convex blade sub-knife 55S is formed at a position above the convex blade main knife 55M in the vertical direction of the device (in other words, a position retracted in the moving direction of the convex blade 50 during cutting). The convex blade sub-knife 55S is not continuous with the convex blade main knife 55M.

The width of the convex blade main knife 55M is the same as or inside the width of the concave blade first knife 25A. As a result, the convex blade main knife 55M passes all or part of the concave blade first knife 25A, and does not pass the concave blade second knife 25B.

Therefore, the convex blade 50 of the modified example 1 also passes the concave blade first knife 25A at the time of cutting, and then passes the concave blade second knife 25B, similarly to the convex blade 40 of the above embodiment.

-Modification example 2-
FIG. 13 shows the convex blade 60 of the modified example 2 together with the concave blade 20.

The convex blade 60 includes a convex blade knife 65 that passes by the concave blade knife 25. The width of the convex blade knife 65 is the same as or inside the width of the concave blade first knife 25A. As a result, the convex blade knife 65 passes all or part of the concave blade first knife 25A, and does not pass the concave blade second knife 25B. Therefore, the convex blade 60 passes only the concave blade first knife 25A among the concave blade knives 25.
Further, the convex blade knife 65 extends linearly, and the extending direction thereof is parallel to the device width direction. As a result, the entire convex blade knife 65 enters the top plate portion 90A of the material to be cut 90 at substantially the same time.

In the second modification, since the convex blade knife 65 does not pass the concave blade second knife 25B, shearing by the convex blade knife 65 and the concave blade 20 does not occur at the ridge line portion 90B. However, since the convex blade knife 65 passes a part or all of the concave blade first knife 25A, shearing is performed on the top plate portion 90A, and a cut end is generated on the top plate portion 90A. Then, when the convex blade knife 65 further enters, the cut end of the top plate portion 90A expands toward the ridgeline portion 90B, and the ridgeline portion 90B is cut.

Of the convex blades, the part that passes the concave blade first knife 25A is called the "convex blade first knife", and the part that passes the concave blade second knife 25B is called the "convex blade second knife". It can be said that the convex blade knife 65 of Example 2 is composed of only the convex blade first knife.

-Modification example 3-
FIG. 14 shows the convex blade 70 of the modified example 3 together with the concave blade 20.

The convex blade 70 includes a convex blade knife 75 that passes by the concave blade knife 25. The width of the convex blade knife 75 is longer than that of the concave blade first knife 25A. That is, the convex blade knife 75 is configured to pass not only the concave blade first knife 25A but also the concave blade second knife 25B. Therefore, the convex blade knife 75 passes by both the concave blade first knife 25A and the concave blade second knife 25B among the concave blade knives 25.

The convex blade knife 75 includes a convex blade main knife 75M at the center in the device width direction and a pair of convex blade sub knives 75S on the outer side in the device width direction. The convex blade main knife 75M extends in the width direction of the device. The convex blade sub-knife 75S is formed continuously from both ends in the width direction (both ends in the extending direction) of the convex blade main knife 75M. The convex blade sub-knife 75S has a shape along the inner surface of the ridge line portion 90B of the material to be cut 90. That is, the convex blade knife 75 is configured to come into contact with the inner surface of the material to be cut 90 at the same time in the entire extending direction at the moment when the convex blade 70 is moved to cut the material to be cut 90. In other words, when viewed from the front of the apparatus, the shape of the convex blade knife 75 matches the shape of the inner surface of the material to be cut 90 at the position of the planned cutting line 95. Therefore, the width of the convex blade main knife 75M is the same as the width of the concave blade first knife 25A.

The alternate long and short dash line in FIG. 14 shows the moment when the convex blade knife 75 passes the concave blade first knife 25A. In other words, in the concave blade first knife 25A, the moment when the convex blade knife 75 and the concave blade knife 25 are at the same height is shown.
At this moment, the convex blade knife 75 passes the concave blade first knife 25A, but has not yet passed the concave blade second knife 25B. That is, the convex blade knife 75 passes the concave blade first knife 25A and then passes the concave blade second knife 25B.
Therefore, according to the convex blade 70, the convex blade knife 75 passes the concave blade second knife 25B in a state where the tension T (see FIG. 9) is applied to the ridge line portion 90B at the time of cutting.

-Comparative example-
Next, in order to clarify the scope of the present invention, comparative examples not included in the present invention will be described.

FIG. 15 shows the convex blade 140 of the comparative example together with the concave blade 20.

The convex blade 140 includes a convex blade knife 145 that passes by the concave blade knife 25. The width of the convex blade knife 145 is outside the concave blade first knife 25A. As a result, the convex blade knife 145 passes not only the concave blade first knife 25A but also the concave blade second knife 25B. The convex blade knife 145 extends in a straight line, and the extending direction thereof is parallel to the device width direction.

The alternate long and short dash line in FIG. 15 shows the moment when the convex blade knife 145 passes the concave blade first knife 25A. In other words, in the concave blade first knife 25A, the moment when the convex blade knife 145 and the concave blade knife 25 are at the same height is shown.
At this moment, in the concave blade second knife 25B, the convex blade knife 145 is below the device with the concave blade knife 25. That is, this moment is after the convex blade knife 65 has already passed the concave blade second knife 25B.
Therefore, the convex blade knife 145 is not configured to pass the concave blade first knife 25A before passing the concave blade second knife 25B.

Therefore, in the comparative example, at the time of cutting, the shearing process occurs at the ridge line portion 90B before the shearing process occurs at the top plate portion 90A. Therefore, since the ridge line portion 90B is sheared before the tension T is applied to the ridge line portion 90B, the load applied to the tool is not reduced.

[supplementary explanation]
In the above description, an example in which the material to be cut is the material 90 to be cut having a U-shaped cross section has been described, but the present invention is not limited to this. The shape of the portion away from the planned cutting line is not particularly limited, and the material to be cut may have, for example, a cross-sectional hat shape.
Further, in the above description, an example in which the material to be cut includes two ridges and two vertical walls has been described, but the present invention is not limited thereto. The material to be cut may have one ridge line portion and one vertical wall portion, and may have an L-shaped cross section, for example.
Further, in the above description, an example in which the plate material is bent 90 degrees at the ridgeline portion of the material to be cut has been described, but the present invention is not limited to this. If the material to be cut has a ridge line portion bent by about 90 to 120 degrees, the cutting method of the present invention can be adopted to reduce the load applied to the tool.
Further, in the above description, an example in which the top plate portion and the vertical wall portion have a flat plate shape has been described, but the present invention is not limited to this. The shape near the planned top plate cutting line 95A and the planned vertical wall cutting line 95C may be substantially flat, and may have a slightly uneven shape. The slightly uneven shape referred to here means that there may be irregularities having a radius of curvature of about 100 mm.
That is, the material to be cut of the present invention includes a top plate portion, a vertical wall portion, and a ridge line portion in which the plate material is bent, which is located between the top plate portion and the vertical wall portion and is made of one plate material. Anything is fine.

Further, in the above description, an example in which the second plate receiving surface 23C is formed so as to extend forward from the first plate receiving surface 23A and the concave angle portion 23B to the front of the device has been described, but the present invention is not limited thereto. The position of the device front end portion of the second plate receiving surface 23 may coincide with the position of the front end portion (that is, the concave blade knife 25) of the first plate receiving surface 23 and the concave angle portion 23B in the device front-rear direction.

Further, in the above description, an example in which the inner pressing member 30 includes the convex angle portion 33B and the second plate pressing surface 33C has been described, but the present invention is not limited to this, and the inner pressing member is at least the first plate. It suffices to have a holding surface. That is, in the above description, an example in which a knife (convex blade knife) is inserted while restraining not only the top plate portion 90A of the material to be cut 90 but also the ridgeline portion 90B and the vertical wall portion 90C from both sides has been described. The invention is not limited to this, and at least the knife may be inserted while the top plate portion of the material to be cut is restrained from both sides.

10 Cutting device 20 Concave blade 23 Plate receiving surface 23A First plate receiving surface 23B Concave corner 23C Second plate receiving surface 24 Concave blade side surface 25 Concave blade knife 25A Concave blade first knife 25B Concave blade second knife 30 Inner holding member 33 Plate holding surface 33A First plate holding surface 33B Convex angle portion 33C Second plate holding surface 34 Holding member side surface 40 Convex blade 43 Convex blade plate contact surface 43M Convex blade Main plate contact surface 43S Convex blade Sub plate contact surface 44 Convex blade side surface 45 Convex blade knife (knife)
45M Convex Blade Main Knife 45S Convex Blade Sub Knife 50 Convex Blade 55 Convex Blade Knife (Knife)
55M Convex Blade Main Knife 55S Convex Blade Sub Knife 60 Convex Blade 65 Convex Blade Knife 70 Convex Blade 75 Convex Blade Knife 75M Convex Blade Main Knife 75S Convex Blade Sub Knife 90 Cutting Material 90A Top Plate 90B Ridge 90C Vertical Wall 90P Product Side Department (part)
90Q Trim side part 95 Scheduled cutting line 95A Scheduled cutting line on the top plate (a part of the boundary of the top plate)
95B Scheduled ridgeline cutting line (partial boundary of the ridgeline)
95C vertical wall cutting planned line

Claims (15)

Made of one plate material,
A top plate portion, a vertical wall portion located on one side of the top plate portion in the width direction of the top plate portion in the plate thickness direction, and a vertical wall portion located between the top plate portion and the vertical wall portion. The cut material provided with the bent ridge line portion of the plate material is cut at a planned cutting line straddling the top plate portion, the ridge line portion, and the vertical wall portion to form a product side portion and a trim side portion. It is a cutting method to separate
A step of restraining a part of the top plate portion belonging to the product side portion from both sides over the entire width, and
In constrained state, the cutting to the top plate portion and the by advancing the knife from the inside of the workpiece at a boundary between the portion of the top plate and the part belonging to the trim side of the top plate The process of generating a cut along the planned line and
Further, a step of inserting the knife into the top plate portion, widening the cut end toward the ridge line portion, and cutting the ridge line portion along the planned cutting line .
A cutting method comprising. In the restraining step, a part of the ridgeline portion is also restrained from both sides.
The cutting method according to claim 1. In the restraining step, the edge of the portion restraining the outer surface of the material to be cut is also a knife.
The cutting method according to claim 1 or 2. In the step of cutting the ridge portion, in the boundary between the part belonging to the product side and the portion belonging to the trim side of the ridge portion advancing the knife from the inside of the workpiece,
The cutting method according to any one of claims 1 to 3. The vertical wall portion of the material to be cut from which the ridgeline portion has been cut is cut.
The cutting method according to any one of claims 1 to 4. First plate holding surface and
The second plate holding surface formed on one side or both sides of the first plate holding surface,
A convex angle portion formed between the first plate holding surface and the second plate holding surface, which is a convexly curved surface,
The first plate pressing surface, the second plate pressing surface, and the side surface of the pressing member formed adjacent to the convex angle portion,
With an inner holding member equipped with
The first plate receiving surface, which is arranged to face the first plate holding surface,
A second plate receiving surface formed on one side or both sides of the first plate receiving surface and arranged to face the second plate holding surface.
A concavely curved surface formed between the first plate receiving surface and the second plate receiving surface, and a concave angle portion arranged to face the convex angle portion.
The side surface of the concave blade, which is arranged so as to be substantially flush with the side surface of the holding member,
A concave blade knife composed of a concave blade first knife formed by the first plate receiving surface and the concave blade side surface, and a concave blade second knife formed by the concave corner portion and the concave blade side surface.
With a concave blade,
It is movable with respect to the concave blade and
A convex blade equipped with a convex blade knife that passes by the concave blade knife due to the movement,
It is a cutting device equipped with
The convex blade knife passes only the concave blade first knife among the concave blade knives.
Cutting device. First plate holding surface and
The second plate holding surface formed on one side or both sides of the first plate holding surface,
A convex angle portion formed between the first plate holding surface and the second plate holding surface, which is a convexly curved surface,
The first plate pressing surface, the second plate pressing surface, and the side surface of the pressing member formed adjacent to the convex angle portion,
With an inner holding member equipped with
The first plate receiving surface, which is arranged to face the first plate holding surface,
A second plate receiving surface formed on one side or both sides of the first plate receiving surface and arranged to face the second plate holding surface.
A concavely curved surface formed between the first plate receiving surface and the second plate receiving surface, and a concave angle portion arranged to face the convex angle portion.
The side surface of the concave blade, which is arranged so as to be substantially flush with the side surface of the holding member,
A concave blade knife composed of a concave blade first knife formed by the first plate receiving surface and the concave blade side surface, and a concave blade second knife formed by the concave corner portion and the concave blade side surface.
With a concave blade,
It is movable with respect to the concave blade and
A convex blade equipped with a convex blade knife that passes by the concave blade knife due to the movement,
It is a cutting device equipped with
The convex blade knife passes both the concave blade first knife and the concave blade second knife among the concave blade knives.
At the time of cutting, the convex blade knife is configured to pass the concave blade second knife after passing the concave blade first knife.
Cutting device. First plate holding surface and
The second plate holding surface formed on both sides of the first plate holding surface and
A convex angle portion formed between the first plate holding surface and the second plate holding surface, which is a convexly curved surface,
The first plate pressing surface, the second plate pressing surface, and the side surface of the pressing member formed adjacent to the convex angle portion,
With an inner holding member equipped with
The first plate receiving surface, which is arranged to face the first plate holding surface,
A pair of second plate receiving surfaces formed on both sides of the first plate receiving surface and arranged to face the second plate holding surface.
A pair of concave corner portions that are concavely curved surfaces formed between the first plate receiving surface and the second plate receiving surface and are arranged so as to face the convex corner portions.
The side surface of the concave blade, which is arranged so as to be substantially flush with the side surface of the holding member,
A concave blade knife composed of a concave blade first knife formed by the first plate receiving surface and the concave blade side surface, and a concave blade second knife formed by the concave corner portion and the concave blade side surface.
With a concave blade,
The inner pressing member is arranged adjacent to the side surface side of the pressing member, and is provided so as to move between the pair of second plate receiving surfaces in a direction parallel to the side surface of the pressing member.
The first side surface of the convex blade, which is arranged to face the side surface of the holding member,
The second side surface of the convex blade formed on both sides of the first side surface of the convex blade,
A convex blade main plate contact surface that is arranged parallel to the first plate receiving surface and has the same width as or narrower than the width of the first plate receiving surface.
A convex blade main knife formed by the first side surface of the convex blade and the contact surface of the convex blade main plate,
With a convex blade,
A cutting device equipped with. The convex blade
A convex blade sub-plate contact surface formed between the convex blade main plate contact surface and the convex blade second side surface and forming a convex shape in the cutting moving direction of the convex blade.
A convex blade sub-knife formed by the first side surface of the convex blade and the contact surface of the convex blade sub-plate,
Is further equipped,
The cutting device according to claim 8. First plate holding surface and
The second plate holding surface formed on one side or both sides of the first plate holding surface,
A convex angle portion formed between the first plate holding surface and the second plate holding surface, which is a convexly curved surface,
The first plate pressing surface, the second plate pressing surface, and the side surface of the pressing member formed adjacent to the convex angle portion,
With an inner holding member equipped with
The first plate receiving surface, which is arranged to face the first plate holding surface,
A second plate receiving surface formed on one side or both sides of the first plate receiving surface and arranged to face the second plate holding surface.
A concavely curved surface formed between the first plate receiving surface and the second plate receiving surface, and a concave angle portion arranged to face the convex angle portion.
The side surface of the concave blade, which is arranged so as to be substantially flush with the side surface of the holding member,
A concave blade knife composed of a concave blade first knife formed by the first plate receiving surface and the concave blade side surface, and a concave blade second knife formed by the concave corner portion and the concave blade side surface.
With a concave blade,
It is provided so as to move in a direction perpendicular to the first plate receiving surface of the concave blade from a position adjacent to the inner holding member to a position adjacent to the concave blade.
Of the concave blade knives, a convex blade having a convex blade main knife formed at a position passing only the concave blade first knife, and
A cutting device equipped with. The convex blade
A convex blade sub-knife formed outside the extending direction of the convex blade main knife and at a position retracted with respect to the moving direction at the time of cutting is further provided.
The cutting device according to claim 10. The convex blade sub-knife is
It is continuously provided from the convex blade main knife, and extends in an inclined direction in a backward direction in the moving direction at the time of cutting as the distance from the convex blade main knife increases.
The cutting device according to claim 11. The convex blade sub-knife is configured so that at least a part of the convex blade sub-knife passes the concave blade second knife.
The cutting device according to claim 11 or 12. There are two each of the second plate receiving surface, the concave corner portion, the concave blade second knife, and the convex corner portion.
The cutting device according to any one of claims 10 to 13. The width of the convex blade main knife is the same as the width of the concave blade first knife.
The cutting device according to claim 14.

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