JP2003039390A - Corrugated sheet punching method, manufacturing method thereof, and ruled line auxiliary member molded body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cardboard sheet punching die which is inexpensive in manufacturing cost and mounting cost, a manufacturing method thereof, and a ruled line auxiliary member molded body. SOLUTION: A cutting base 4 for punching a corrugated cardboard sheet W into a predetermined shape and a ruled pressing blade 6 formed into a predetermined ruled line shape are provided on a mold base portion 112 of a punching die 110 with a sheet of the corrugated cardboard sheet W. Each is attached in a form protruding inward. In addition, the step (wave) of the corrugated cardboard sheet W is formed on the mold base portion 112 from the sheet inner surface side by the ruler blade 6.
Ruled line auxiliary member 8 for crushing along the longitudinal direction of
Like the ruled blade 6, it is attached to both sides of the ruled blade 6 so as to protrude toward the inner side of the sheet. The ruled line assisting member 8 extends in a direction substantially perpendicular to the longitudinal direction of the ruled blade 6 in a substantially parallel manner, and includes a plurality of pressing portions 81 protruding at predetermined intervals in the longitudinal direction, and the pressing portion 81 extending in the longitudinal direction. And a connecting portion 82 for connection, and is integrally formed with a predetermined forming length in the longitudinal direction. Then, the plurality of ruled line auxiliary members 8 are arranged in series along the longitudinal direction, and are arranged and fixed to the mold base 112.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated board sheet punching die, a method for manufacturing the same, and a ruled line auxiliary member formed body.

[0002]

2. Description of the Related Art In general, it is not easy to form corrugated corrugated sheets in a straight line in the longitudinal direction (the direction in which peaks or valleys of corrugations are continuous). Therefore, in the process of punching a corrugated cardboard sheet with a cutting blade, if a ruled line is placed along the longitudinal direction of the step and a ruled line (folded line) is inserted, the ruled line (ruled line) enters the step crest or valley. I will enter. Therefore, it is difficult to form straight folds along the ruled lines when assembling the corrugated board sheet into a box or the like.

Therefore, for example, in Japanese Unexamined Patent Publication No. 2001-1420, on both side surfaces of the ruled blade, they extend parallel to each other in a direction orthogonal to the longitudinal direction of the ruled blade, and at predetermined intervals along the longitudinal direction. It is described that a ruled line reinforcing member having a reinforcing protrusion (pressing portion) protruding from the mold base is provided.

[0004]

According to such a structure, the corrugated cardboard sheet step is intermittently provided by the reinforcing projections along the longitudinal direction while leaving the portion which is not crushed and remains hard as the core of the fold. By crushing and softening, it becomes easy to form a straight fold line along the ruled line.

However, if such reinforcing protrusions are manufactured one by one and individually attached to the mold base, the manufacturing cost and the mounting cost may increase. On the other hand, when all the reinforcing protrusions are integrally molded in the length direction of the ruled line, it becomes impossible to repair or replace each reinforcing protrusion, resulting in high maintenance cost.

An object of the present invention is to provide a corrugated cardboard sheet punching die which is inexpensive in manufacturing cost, mounting cost, etc., a manufacturing method thereof, and a ruled line auxiliary member molded body.

[0007]

Means for Solving the Problems and Effects of the Invention In order to solve the above-mentioned problems, the first aspect of the corrugated cardboard sheet punching die of the present invention is a cutting blade formed in a predetermined punching shape, and a predetermined punching die. A ruled line pressing blade formed in a ruled line shape and the inner side of the folded corrugated sheet (hereinafter referred to as the inner side of the sheet)
Ruled line assisting members for crushing the steps from along the longitudinal direction of the ruled ruler blades, and die base parts attached with the cutting blades, ruler pressing blades and ruler line assisting members protruding toward the inner surface of the sheet. A corrugated cardboard sheet punching die having: the ruled line assisting member disposed on at least one side surface side of the ruled line pressing blade, and in a direction intersecting the longitudinal direction (hereinafter referred to as a pressing portion forming direction). A plurality of pressing portions that extend in a substantially parallel shape and project at predetermined intervals in the longitudinal direction, and a connecting portion that connects these pressing portions in the longitudinal direction, and a plurality of the ruled line auxiliary The members are arranged and fixed in series along the longitudinal direction.

In order to solve the above-mentioned problems, the second aspect of the corrugated board sheet punching die of the present invention is to provide a cutting blade formed in a predetermined punching shape and a folded portion on the corrugated board sheet. A ruled pressing blade having two rows of blades that are substantially parallel to each other in the longitudinal direction and formed into a predetermined ruled line shape, and a step from the inner side of the folded corrugated cardboard sheet (hereinafter referred to as the inner side of the sheet) to the ruled line. Corrugated cardboard sheet having a ruled line auxiliary member for crushing along the longitudinal direction of the pressing blade, and a die base portion to which the cutting blade, the ruled line pressing blade and the ruled line auxiliary member are respectively attached so as to project to the inner surface side of the sheet. A punching die, wherein the ruled line assisting member is arranged at least between side surfaces of the two rows of blades of the ruled pressing blade that face each other, and intersects with the longitudinal direction (hereinafter, referred to as a pressing portion forming direction). And a plurality of pressing portions protruding in the longitudinal direction at predetermined intervals, and a connecting portion for connecting these pressing portions in the longitudinal direction, and The ruled line assisting member is
It is characterized in that they are arranged and fixed in series along the longitudinal direction.

On the other hand, in order to solve the above-mentioned problems, the first aspect of the method for manufacturing a corrugated cardboard sheet punching die of the present invention is such that a cutting blade formed in a predetermined punching shape and a predetermined ruled line shape are formed. And a ruled line assisting member for crushing a step from the folding inner surface side of the corrugated cardboard sheet (hereinafter referred to as the sheet inner surface side) along the longitudinal direction of the ruler pressing blade, projecting toward the sheet inner surface side. When each is attached to the mold base portion in a form, the ruled line assisting member,
A plurality of pressing portions that extend at a predetermined interval in the longitudinal direction and extend in a direction substantially parallel to the direction intersecting the longitudinal direction (hereinafter, referred to as pressing portion forming direction), and connect these pressing portions in the longitudinal direction. And a connecting portion for performing integral molding with a predetermined molding length in the longitudinal direction, and a plurality of the ruled line assisting members along at least one side face side of the ruled blade along the longitudinal direction. It is characterized in that they are arranged and fixed in series.

Further, in order to solve the above-mentioned problems, the second aspect of the method for manufacturing a corrugated board sheet punching die of the present invention is to form a cutting blade having a predetermined punching shape and a folded portion on the corrugated board sheet. In order to do so, there are two rows of blades that are substantially parallel to each other in the longitudinal direction, and a ruled pressing blade formed in a predetermined ruled line shape, and a step from the inner side of folding the corrugated cardboard sheet (hereinafter referred to as the inner side of the sheet). And a ruled line assisting member for crushing the ruled line along the longitudinal direction of the ruled blade when each is attached to the mold base in a form projecting toward the inner surface of the sheet, the ruled line assisting member intersects the longitudinal direction. To extend in a direction substantially parallel to the pressing direction (hereinafter referred to as the pressing portion forming direction) and to project the pressing portions at predetermined intervals in the longitudinal direction, and to connect these pressing portions in the longitudinal direction. A plurality of ruled line assisting members having a connecting portion and integrally molded in the longitudinal direction with a predetermined molding length, at least between the side surfaces facing the two rows of the ruled line pressing blades in the longitudinal direction. It is characterized in that they are arranged and fixed in series along with.

According to these inventions, a plurality of ruled line auxiliary members having a plurality of pressing portions and a connecting portion for connecting these are arranged in series along the longitudinal direction to manufacture the pressing portions one by one. As compared with the case of mounting, the manufacturing cost of the ruled line assisting member and the man-hour for arranging and fixing the ruled line assisting member on the die base are greatly reduced.

The cardboard sheet punching die or the method for producing the same according to the present invention can be applied to any of the following two aspects. That is, as a first aspect, when the ruled line assisting member is arranged on at least one side surface side of the ruled line pressing blade, and as a second aspect, the corrugated cardboard sheet has approximately 1
In order to form a folded-back portion that bends by 80 °, the ruled blade has two rows of blade portions substantially parallel to each other in the longitudinal direction, and the ruled line assisting member faces at least two rows of blades of the ruled blade. There are two aspects when they are arranged between the side surfaces.

In order to solve the above-mentioned problems, the ruled line assisting member molded body of the present invention comprises a cutting blade formed into a predetermined punched shape and a ruled pressing blade formed into a predetermined ruled line shape. , A corrugated sheet punching die base mounted on the corrugated cardboard sheet so as to project toward the folded inner surface side (hereinafter referred to as the sheet inner surface side), and a step is formed from the sheet inner surface side along the longitudinal direction of the ruled blade. It is planned to be arranged and fixed as a ruled line auxiliary member for crushing,
A plurality of pressing portions that extend at a predetermined interval in the longitudinal direction in a shape that extends substantially parallel to a direction intersecting the longitudinal direction (hereinafter, referred to as pressing portion forming direction), and these pressing portions in the longitudinal direction. A connecting portion for connecting, and the pressing portion and the connecting portion are formed integrally to a predetermined forming length in the longitudinal direction with a forming width continuous in the pressing portion forming direction. Characterize.

As described above, the ruled line auxiliary member molded body can be manufactured at a low cost by integrally molding the ruled line auxiliary member as a molded body in which the pressing portion and the connecting portion are connected in the pressing portion forming direction with a continuous molding width. it can.

Then, a plurality of ruled line assisting members obtained by cutting the ruled line assisting member molded body along the longitudinal direction with a predetermined cutting width are arranged and fixed in series along the longitudinal direction to manufacture the ruled line assisting member. The cost, installation cost, maintenance cost, etc. can be further reduced.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of a corrugated board sheet punching device using a corrugated board sheet punching die (hereinafter, simply referred to as a punching die) according to the present invention. This corrugated board sheet punching device 100 is shown in FIG.
As shown in (a), it is provided with a punching die 110 and a punching die receiving member 120 which face each other with the corrugated cardboard sheet W interposed therebetween. Further, FIG. 1B shows a perspective view of the punching die 110 of FIG. 1A turned upside down.

The die base 112 of the punching die 110 includes
The band-shaped metal cutting blade 4 for punching the corrugated cardboard sheet W into a predetermined shape and the band-shaped metal ruled blade 6 formed in a predetermined ruled line shape are used for folding the inner surface of the corrugated cardboard W (hereinafter referred to as a sheet inner surface). (Referred to as the side), each of them is attached in a protruding form. Further, in the mold base 112, a metal or synthetic resin ruled line auxiliary member 8 for crushing the corrugated sheet corrugated sheet W from the sheet inner surface side along the longitudinal direction of the ruled line pressing blade 6, Similar to the ruled line pressing blade 6, it is attached to both sides (that is, both side faces of the ruled line pressing blade 6) with the ruled line pressing blade 6 being sandwiched between the sheet and the sheet. On the other hand, the punching die receiving member 120 is provided so as to face the punching die 110 with the corrugated cardboard sheet W interposed therebetween, and the surface of the receiving base portion 122 facing the punching die 110 is formed on the corrugated cardboard sheet mounting surface 124. ing.

The cardboard sheet mounting surface 124 is shown in FIG.
As shown in (a), it also has a function as a receiving surface for the cutting blade 4 and the ruled pressing blade 6 when the punching die 110 and the punching die receiving member 120 relatively approach each other. That is, the corrugated cardboard sheet W is placed on the corrugated cardboard sheet mounting surface 124 of the receiving base portion 122, the die base portion 112 is further stacked thereon, and the punching die 110 and the punching die receiving member 120 are brought into pressure contact with each other, The corrugated board sheet W is punched into a predetermined shape along the cutting blade 4, and a ruled line (crease line) having a predetermined shape along the ruled line pressing blade 6 is inserted.

By the way, the ruled line assisting member 8 is used as the ruled line pressing blade 6.
A predetermined pitch interval P in the longitudinal direction (see FIG. 2) that extends substantially parallel to a direction that intersects (for example, substantially orthogonally intersects) with the longitudinal direction (hereinafter, referred to as a pressing portion forming direction).
And a plurality of (for example, three) pressing portions 81 projecting at substantially the same projecting height H (FIG. 2) as the ruled pressing blades 6, and these pressing portions 81.
And a connecting portion 82 for connecting in the longitudinal direction. Further, the ruled line assisting member 8 has a ruled line length in the longitudinal direction (also referred to as the length of the ruled line pressing blade 6; L0 in FIG. 5B).
(See FIG. 2) is formed into a molding length L (FIG. 2) divided into predetermined values, and a predetermined number of ruled line auxiliary members 8 are arranged in series along the longitudinal direction on both sides of the ruled blade 6 to form a mold. It is arranged and fixed to the base portion 112.

Here, the value for dividing the ruled line length may not be an integer, and in this case, the ruled line auxiliary members 8 arranged side by side.
The number of will not match the divided value. For example, when the ruled line length is 550 mm and the molding length L is 100 mm, the value for dividing the ruled line length is 5.5, and six ruled line auxiliary members 8 are arranged (however, one of them is 5
It is used by cutting it to 0 mm).

In this ruled line assisting member 8, as shown in FIG. 2, the pressing portion 81 and the connecting portion 82 have a molding width W0 which is continuous in the pressing portion forming direction, and the ruled line length in the longitudinal direction as described above. The ruled line auxiliary member molded body 80 integrally molded in a block shape into a molding length L divided by a predetermined value is cut at a predetermined cutting width W1 along the longitudinal direction (see the cutting line C1 in FIG. 2B). I am using what I did.

As shown in FIG. 2A, the ruled line assisting member 8
The pressing portion 81 of the (ruled line auxiliary member molded body 80) is formed in a mountain shape (trapezoidal shape) having a ridge line portion 81a having an inclination angle θ (for example, 60 °) and a flat portion 81b at the top in a side view. . Further, the connecting portion 82 has a contact surface 82 a for fixing the ruled line assisting member 8 in contact with the die base portion 112, and the contact surface 82 a is provided with the adhesive layer 9 interposed therebetween.
It is fixed to.

Now, a method of manufacturing the ruled line auxiliary member molded body 80 having such a shape will be described. When the ruled line assisting member formed body 80 is made of a metal material such as aluminum, the metal material (ingot) is subjected to plastic working such as cold drawing in the pressing portion forming direction, or shape cutting, By performing removal processing such as grinding, the pressing portion 81 and the connecting portion 82 are formed. Alternatively, the pressing portion 81 and the connecting portion 82 may be integrally formed by casting. On the other hand, when the ruled line auxiliary member molded body 80 is made of a synthetic resin material such as polyethylene or polypropylene, integral molding processing such as injection molding or extrusion molding is performed to form the pressing portion 81 and the connecting portion 82. These processing methods have a plurality of pressing portions 81 protruding at a pitch interval P and a protruding height H, and a connecting portion 82 for connecting these pressing portions 81 in the longitudinal direction, and these pressing portions are provided. 81 and the connecting portion 82 have a forming width W
0, Ruled line auxiliary member molded body 8 integrally molded to molding length L
0 is obtained (FIG. 2).

Next, a method of manufacturing the punching die 110 will be described. In the mold base 112, the cutting blades 4 are arranged in a predetermined punching shape, and the ruled pressing blades 6 are arranged in a predetermined ruled line shape, and are attached in advance in such a manner that they project toward the inner surface of the sheet (see FIG. 1 ( b)). The ruled line auxiliary member molded body 80 is sequentially cut along the longitudinal direction with a cutting width W1 along the cutting line C1 in FIG. 2B to obtain a predetermined number of ruled line auxiliary members 8. Then, a predetermined number of ruled line assisting members 8 are arranged in series along the longitudinal direction on both sides of the ruled line pressing blade 6 (FIG. 1B), and the mold base portion 1 is interposed via the adhesive layer 9.
It is stuck and fixed on 12 (FIG. 2A).

Further, the corrugated board sheet punching device 100
A method of punching the corrugated cardboard sheet W using is described. Corrugated cardboard sheet mounting surface 124 of receiving base 122
When the corrugated cardboard sheet W is placed on the punching die 110 and the punching die 110 is lowered from the upper side to approach the punching die receiving member 120,
The cutting blade 4 punches the cardboard sheet W into a predetermined shape,
The ruler pressing blade 6 puts a ruled line of a predetermined shape on the corrugated cardboard sheet W (FIG. 1A). At this time, the pressing portion 81 of the ruled line assisting member 8 intermittently crushes the corrugated sheet W so that the corrugated sheet is softened to make it easier to bend, and the portion of the corrugated sheet W that remains hard without being crushed. By leaving as the core of the fold, it becomes easy to form a straight fold along the ruled line.

In addition, the ruled line assisting member 8 is formed by cutting the ruled line assisting member molded body 80 in which the pressing portion 81 and the connecting portion 82 are integrally molded in a block shape along the longitudinal direction with the cutting width W1. Are arranged in series along the mold base 112.
Therefore, the manufacturing cost, the mounting cost, the maintenance cost, etc. can be reduced. The connecting portion 8
The second contact surface 82a has the adhesive layer 9 and the mold base 11
Since it is fixed to No. 2, the ruled line assisting member 8 can be firmly fixed to the die base 112 at low cost.

Further, the pressing portion 81 of the ruled line assisting member 8 is
FIG. 2 is a side view (that is, viewed from the pressing portion forming direction).
As shown in (a), the connecting portion 82 side is formed in a wide trapezoidal shape. Since the connecting portion 82 side is formed wide, sufficient mounting strength is secured, and the top flat portion 81 is formed.
By forming b to be narrow, it is possible to press the sheet inner surface side of the corrugated board sheet W with a large pressure even with a relatively small punching force, and it is easy to form a straight fold line along the ruled line.

Further, as shown in FIG. 2, a gap S is provided between the connecting portions 82, 82 of the ruled line assisting members 8, 8 adjacent in the longitudinal direction. The gap S absorbs a dimensional error when the ruled line assisting member 8 is manufactured or attached, and the gap between the pressing portions 81 and 81 formed at the ends of the ruled line assisting members 8 and 8 adjacent in the longitudinal direction is pitched. It can be arranged and fixed so as to match the interval P. Further, even when the ruled line assisting member 8 thermally expands due to the continued punching work of the corrugated board sheet W, the gap S can prevent the ruled line assisting members 8 from being deformed due to mutual interference (contact).

FIG. 3 shows an example of changing the arrangement of the ruled line assisting member 8. In FIG. 3A, a plurality (for example, three) of ruled line assisting members 8 attached to both side surfaces of the ruled line pressing blade 6.
The parallel pressing portion 181 is obliquely formed with respect to the ruled pressing blade 6 so that the pressing portion forming direction intersects with the longitudinal direction of the ruled pressing blade 6 at a crossing angle α (for example, 80 °). .
Such a ruled line assisting member 8 has two parallel cutting lines C2, C2 having a crossing angle α and a cutting width W2 with respect to the pressing portion forming direction in the ruled line assisting member molded body 80 of FIG. 2B.
It is obtained by cutting along the longitudinal direction. As described above, when the pressing portion 181 is formed obliquely with respect to the ruled line pressing blade 6, if it is possible to cut out from the same ruled line auxiliary member molded body 80 as in FIG. 2B, the manufacturing cost is further reduced. You can

In FIG. 3 (b), in addition to FIG. 3 (a), the ruled line assisting member 8 is pressed by a predetermined amount (for example, a half pitch) with respect to the pitch interval P on both sides of the ruled line pressing blade 6. The parts 181 and 181 are continuously formed in a zigzag pattern in the longitudinal direction. In this case also, the ruled line assisting member 8
Can be cut out from the ruled line auxiliary member molded body 80 of FIG. 2B in the same manner as described above, which contributes to reduction of manufacturing cost.

(Embodiment 2) Next, FIG. 4 shows another embodiment of the corrugated board sheet punching device using the punching die according to the present invention. The corrugated board sheet punching device 200 is used when forming a folded-back portion that bends about 180 ° on the corrugated board sheet W, and includes a punching die 210 and a punching die receiving member 220 that face each other with the corrugated board sheet W sandwiched therebetween.

The die base portion 212 of the punching die 210 is
In addition to the strip-shaped metal cutting blade 4 for punching the corrugated cardboard sheet W into a predetermined shape, in order to form a folded portion on the corrugated cardboard sheet W, two rows of strip-shaped metal made substantially parallel to the longitudinal direction are used. The ruled pressing blades 6 having the blade portions 61 and 62 are attached so as to protrude toward the inner surface of the sheet. Further, in the die base portion 212, a ruled line auxiliary member 8 made of metal or synthetic resin for crushing the steps (corrugations) of the corrugated cardboard sheet W from the sheet inner surface side along the longitudinal direction of the ruled line pressing blade 6.
However, like the ruled line pressing blade 6, it is attached so as to project to the inner surface side of the sheet. In the case of this embodiment, the ruled line auxiliary member 8
Is composed of an inner auxiliary member 8A located between the side surfaces where the blade portions 61 and 62 face each other, and two outer auxiliary members 8B and 8B located on the outer surface side where the blade portions 61 and 62 do not face each other.

On the other hand, the punching die receiving member 220 is provided so as to face the punching die 210 with the corrugated cardboard sheet W interposed therebetween, and the surface of the receiving base portion 222 facing the punching die 210 is the corrugated cardboard sheet mounting surface 224. Is formed in.

By the way, the inner auxiliary member 8A (or the outer auxiliary member 8B) of the ruled line auxiliary member 8 has a pressing portion 81A (or 81B) and a connecting portion 82A (or 82B) having the same structure as that of the first embodiment. . That is, the inner auxiliary member 8A
The side shape of (or the outer auxiliary member 8B) is as shown in FIG. 2 with the pressing portion 81 being 81A (or 81B) and the connecting portion 82.
Are denoted by 82A (or 82B) by symbol substitution, and detailed description thereof will be omitted.

Regarding the inner auxiliary member 8A (or the outer auxiliary member 8B), the ruled line auxiliary member molded body 80 is cut along the longitudinal direction with a predetermined cutting width W1 (see the cutting line C1 in FIG. 2B). Also in the point of using the prepared one, Example 1
Is the same as.

Therefore, the description of Embodiment 1 can be applied to the method of manufacturing the ruled line assisting member molded body 80 and the method of manufacturing the punching die 210 in this embodiment as they are.

Therefore, the corrugated board sheet punching device 200
A method of punching the corrugated cardboard sheet W using is described. Corrugated cardboard sheet mounting surface 224 of the receiving base portion 222
The corrugated cardboard sheet W is placed on, and the punching die 210 is lowered from above to approach the punching die receiving member 220. Then, the cutting blade 4 punches the corrugated cardboard sheet W into a predetermined shape, and the blade portions 61 and 62 of the ruled pressing blade 6 are corrugated cardboard sheet W.
A ruled line of a predetermined shape for forming a folded-back portion that is bent by about 180 ° is inserted in (FIG. 4 (a)). At this time, when only the ruled line pressing blade 6 having the blade portions 61 and 62 is provided, two rows of ruled lines (crease lines) substantially parallel to the longitudinal direction are provided on the sheet inner surface side W ′ of the corrugated cardboard sheet W. ) 60
Only 0 and 600 are formed, and when this is bent to the sheet inner surface side W ′, the folded portion 700 tends to be rounded (FIG. 5A).

However, as in this embodiment, the pressing portion 81
When the ruled line auxiliary member 8 having A and 81B is provided, the longitudinal direction of the sheet inner surface W ′ is extended substantially parallel to the pressing portion forming direction that is substantially orthogonal to the longitudinal direction of the ruled pressing blade 6. At a predetermined pitch interval P in the auxiliary ruled line 80
Zeros are also formed. Therefore, this is W '
When folded back, the folded-back portion 700 is formed to be angular compared to the above case (FIG. 5B). That is, the pressing portions 81A and 81B of the ruled line assisting member 8 intermittently crush the corrugated sheet W to soften the corrugated sheet so that the corrugated sheet can be easily folded back. By leaving the portion as the core of the fold, it becomes easy to form a straight fold along the ruled line 600, and as a result, the folded-back portion 700 is formed to be angular.

Next, an example of changing the arrangement of the ruled line assisting member 8 is shown in FIG.
7 and FIG. In FIG. 6, a plurality (for example, three) of parallel pressing portions 281 of the outer auxiliary member 8B located on the outer surface side where the blade portions 61 and 62 do not face each other, the pressing portion forming direction is the longitudinal direction of the ruled pressing blade 6. It is formed obliquely with respect to the ruled blade 6 so as to intersect with the direction at a crossing angle α (for example, 80 °). Such an outer auxiliary member 8B is similar to the ruled line auxiliary member 8 in FIG. 3A, in the ruled line auxiliary member molded body 80 in FIG. 2B, the crossing angle α and the cutting width with respect to the pressing portion forming direction. It is obtained by cutting along the longitudinal direction by two parallel cutting lines C2, C2 having W2.

In FIG. 7, in addition to FIG. 6, the outer auxiliary member 8B is further provided with a pressing portion which is displaced by a predetermined amount (for example, a half pitch) from the pitch interval P on the outer surface side where the blade portions 61 and 62 do not face each other. 281, 281 are continuously formed in a zigzag pattern in the longitudinal direction. Also in this case, the outer auxiliary member 8
B can be cut out from the ruled line auxiliary member molded body 80 of FIG. 2B in the same manner as above.

(Embodiment 3) FIG. 8 shows still another embodiment of the punching die according to the present invention. In the die base portion 312 of the punching die 310 shown in FIG.
Similar to (FIG. 1), a row of ruled line pressing blades 6 and ruled line auxiliary members 8 on both sides thereof are attached. On the other hand, FIG.
The die base portion 412 of the punching die 410 shown in FIG. 2 is provided with the ruled line pressing blade 6 having two rows of blade portions 61 and 62 and the ruled line assisting member 8 as in the second embodiment (FIG. 4). The auxiliary member 8 is composed of an inner auxiliary member 8A located between the side surfaces where the blade portions 61 and 62 face each other, and two outer auxiliary members 8B and 8B located on the outer surface side where the blade portions 61 and 62 do not face each other. To be done.

In this embodiment, the ruled line assisting members 8, 8
In the pressing portions 81, 81B of B, the cut-off angle β with respect to the mold base portions 312, 412 is set so that the protruding height H (see FIG. 9A) becomes smaller as the distance from the ruled blade 6 increases.
Shoulder 81 intersects at (for example, 30 °; see FIG. 9B)
c is formed. Shoulders 81c on the pressing portions 81 and 81B
By providing, the contact of the pressing portions 81 and 81B with respect to the corrugated cardboard sheet W becomes gentle (smooth), and it is possible to prevent tearing or the like on the inner surface side of the sheet.

Ruled line auxiliary member 8 having such a shape,
8B is obtained by the procedure shown in FIG. The ruled line assisting member 8 will be described below as an example, but the ruled line assisting member 8B can be manufactured by the same method. First, the integrally molded ruled line auxiliary member molded body 80 is sequentially cut along the longitudinal direction with a cutting width W1 along the same cutting line C1 as in FIG. 2B to obtain a predetermined number of ruled line auxiliary members 8 ( FIG. 9A). Next, the shoulder 81c (see FIG. 8) is formed on the ruled line assisting member 8 by the cutting line C3 having the inclination of the cut-off angle β with respect to the horizontal plane. At this time, the cutting line C3 is adjusted so that the ruled line assisting members 8 located on the right and left sides of the ruled line pressing blade 6 have the respective cut-off angles β in the opposite directions.
Two types of ruled line assisting members 8 having opposite directions are created (FIGS. 9 (b1) and (b2)).

Next, FIG. 10 shows an example of changing the arrangement of the ruled line assisting member 8. In FIG. 10, the ruled line assisting members 8, 8 located on both sides of the ruled line pressing blade 6 are arranged by rotating them by about 180 ° on the left and right, and the positions of the pressing portions 81, 81 in the longitudinal direction are substantially aligned on the left and right. is there. According to such an arranging method, the ruled line auxiliary members 8 having the same shape can be arranged on both sides of the ruled pressing blade 6 with their front and rear (longitudinal direction) orientations changed. Therefore, as shown in FIG. 9 (b1) (b2). Only one of the ruled line auxiliary members 8 needs to be created, and the production efficiency is improved. At that time, when the tip end positions (lower end positions in FIG. 10) of the ruled line auxiliary members 8, 8 located on both sides of the ruled line pressing blade 6 are aligned, the pressing portions 81, 81 are staggered in the longitudinal direction. Will be placed in.

The ruled line assisting member 8B shown in FIG.
However, the modified examples described above can be similarly applied. Further, the ruled line assisting members 8 and 8B shown in FIGS. 8 to 10 (Embodiment 3) also have the intersection angle α as shown in FIG. 3 (Embodiment 1) or FIGS. 6 and 7 (Embodiment 2). The shape can be changed.

The present invention can be similarly applied to both a flat die and a rotary die.
Further, the connecting portion 82 of the ruled line assisting member 8 is connected to the mold base portion 112.
As a method for fixing to the mold base part 112, a method of fixing the connecting part 82 to the mold base part 112 using a nail, a machine screw or the like, or a method of fixing the ruled line assisting member 8 to the mold base part 112, in addition to attaching it via the adhesive layer 9. It is possible to select a method of mounting in the form of implantation. Further, even if the ruled line auxiliary member molded body 80 is not cut along the longitudinal direction with a predetermined cutting width W1, the pressing portion 81
The ruled line assisting member 8 may be formed by integrally molding the connecting portion 82 and the connecting portion 82 with a predetermined width W1 from the beginning.

The protrusion height H of the pressing portion 81 of the ruled line assisting member 8
Is set to be approximately equal to the protruding height of the ruled blade 6, but may be adjusted to be larger or smaller than the protruding height of the ruled blade 6 depending on the quality of the corrugated cardboard sheet W, the pressing force of the punching die 110, and the like. Good. Next, the side view shape of the pressing portion 81 can be changed to various shapes other than the trapezoidal shape as shown in FIG. Further, in FIG. 4B, two types of ruled line auxiliary members fixed to the punching die 210 (die base portion 212) to form the folded portion, that is, the inner auxiliary member 8A and the outer auxiliary members 8B, 8B are The shape does not have to be the same in side view.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of a corrugated board punching device using a corrugated board punching die according to the present invention and a perspective view of the corrugated board punching die.

FIG. 2 is a side view and a plan view of a ruled line auxiliary member molded body.

FIG. 3 is a plan view showing an example of arrangement of ruled line assisting members in place of FIG. 1 (b).

FIG. 4 is a front sectional view showing another embodiment of a corrugated board sheet punching device using a corrugated board sheet punching die according to the present invention and a perspective view of the corrugated board sheet punching die.

FIG. 5 is an operation explanatory view when forming a folded portion on a corrugated board sheet.

FIG. 6 is a plan view showing a first arrangement example of the ruled line assisting member, which is an alternative to FIG. 4B.

FIG. 7 is a plan view showing a second arrangement example of the ruled line assisting member which replaces FIG. 4 (b).

FIG. 8 is a perspective view showing still another embodiment of the corrugated board sheet punching die according to the present invention.

9 is an explanatory view showing a process of manufacturing the ruled line assisting member of FIG. 8 from the ruled line assisting member molded body.

FIG. 10 is a plan view showing an example of arrangement of ruled line assisting members in place of FIG. 8 (a).

[Explanation of symbols]

4 cutting blades 6,61,62 Ruled blade 8,8A, 8B Ruled line auxiliary member 80 Ruled line auxiliary member molded body 81 Pressing part 82 Connection 82a contact surface 9 Adhesive layer 100,200 Cardboard sheet punching device 110,210 punching type (corrugated cardboard sheet punching type) 112,212 type base 120, 220 Punching die receiving member 122, 222 receiving base

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shigenobu Kawai             78 Yamanogami, Imagawa-cho, Kariya city, Aichi prefecture (72) Inventor Masahiko Sekimoto             1-1805 Amashida, Moriyama-ku, Nagoya-shi, Aichi             Local Limited Company SKMD (72) Inventor Shinji Mizuno             8-7 Obata Chiyoda, Moriyama-ku, Nagoya-shi, Aichi               Chiyodauchi Co., Ltd. F-term (reference) 3C060 AA01 BA07 BB18 BB19                 3E075 AA10 AA28 BA01 CA01 DA04                       DA32 DB03 DB22 GA02

Claims (9)

[Claims] 1. A cutting blade formed into a predetermined punched shape, a ruled pressing blade formed into a predetermined ruled line shape, and a step from the inner side of the folded corrugated cardboard sheet (hereinafter, referred to as the inner side of the sheet). Corrugated cardboard sheet punching having a ruled line auxiliary member for crushing along the longitudinal direction of the blade, and a cutting base, a ruled line pressing blade, and a die base part respectively attached such that the ruled line auxiliary member protrudes toward the inner surface of the sheet. A mold, wherein the ruled line assisting member is arranged on at least one side surface side of the ruled line pressing blade and extends substantially parallel to a direction intersecting the longitudinal direction (hereinafter, referred to as a pressing portion forming direction). A plurality of pressing portions projecting at predetermined intervals in the longitudinal direction, and a connecting portion for connecting these pressing portions in the longitudinal direction, and a plurality of the ruled line assisting members, Corrugated sheet punching die, characterized in that fixedly arranged in series fashion along the serial longitudinally. 2. A cutting blade formed in a predetermined punched shape, and two rows of blades substantially parallel to each other along a longitudinal direction for forming a folded portion on a corrugated cardboard sheet, and formed in a predetermined ruled line shape. And a ruled line auxiliary member for crushing a step from the inside of the corrugated cardboard sheet (hereinafter referred to as the sheet inner surface) along the longitudinal direction of the ruled blade, and the cutting blades and the ruled stamps. A corrugated cardboard sheet punching die having a die and a die base portion attached in a form projecting to the inner surface side of the sheet, wherein the crease assistance member includes at least two rows of blade portions of the scoring blade. Are arranged between the side surfaces facing each other, and extend substantially parallel to a direction intersecting the longitudinal direction (hereinafter referred to as a pressing portion forming direction) and project at predetermined intervals in the longitudinal direction. A pressing part and a connecting part for connecting the pressing parts in the longitudinal direction, and wherein the plurality of ruled line auxiliary members are arranged and fixed in series along the longitudinal direction. Corrugated cardboard sheet punching type. 3. The ruled line assisting member is a ruled line assisting member molded body in which the pressing portion and the connecting portion are integrally molded with a molding width continuous in the pressing portion forming direction, along the longitudinal direction. 3. A shape cut by a cutting width.
Cardboard sheet punching die described in. 4. The cardboard sheet punching die according to claim 1, wherein the connecting portion has a contact surface for fixing the ruled line assisting member in contact with the die base portion. 5. The cardboard sheet punching die according to claim 4, wherein the contact surface is fixed to the die base portion via an adhesive layer. 6. A cutting blade formed in a predetermined punched shape, a ruled pressing blade formed in a predetermined ruled line shape, and a folding inner surface side of the corrugated cardboard sheet (hereinafter referred to as a sheet inner surface side).
And a ruled line assisting member for crushing a step along the longitudinal direction of the ruled line pressing blade, and the ruled line assisting member is attached to the mold base in a form projecting toward the inner surface of the sheet, A plurality of pressing portions that extend in a direction substantially parallel to a direction intersecting with (hereinafter, referred to as a pressing portion forming direction) and project at predetermined intervals in the longitudinal direction, and for connecting these pressing portions in the longitudinal direction. A plurality of ruled line assisting members, which are integrally molded in the longitudinal direction with a predetermined molding length in a longitudinal direction, on a side surface side of at least one of the ruled blades in series along the longitudinal direction. A method for manufacturing a punching die for corrugated cardboard, which is characterized in that it is arranged and fixed. 7. A cutting blade formed in a predetermined punched shape and two rows of blades substantially parallel to each other along a longitudinal direction for forming a folded portion on a corrugated cardboard sheet, and formed in a predetermined ruled line shape. And a ruled line assisting member for crushing a step from the folding inner surface side of the corrugated cardboard sheet (hereinafter referred to as the sheet inner surface side) along the longitudinal direction of the ruler pressing blade to the sheet inner surface side. When each is attached to the mold base portion in a projecting form, the ruled line assisting member extends in a direction substantially parallel to a direction intersecting the longitudinal direction (hereinafter referred to as a pressing portion forming direction) and has a predetermined lengthwise direction. A plurality of pressing portions protruding at intervals and a connecting portion for connecting these pressing portions in the longitudinal direction are integrally formed with a predetermined molding length in the longitudinal direction, and the plurality of ruled line auxiliary members are , Small Between sides edge portions of Kutomo two rows of the ruling push blade faces, cardboard sheet punching die manufacturing method which is characterized in that fixedly arranged in series fashion along the longitudinal direction. 8. As the ruled line assisting member, a ruled line assisting member molded body, in which the pressing portion and the connecting portion are integrally molded with a molding width continuous in the pressing portion forming direction, is formed along the longitudinal direction. The method for manufacturing a corrugated board sheet punching die according to claim 6 or 7, which is used by cutting with a cutting width. 9. A form in which a cutting blade formed in a predetermined punched shape and a ruled pressing blade formed in a predetermined ruled line shape project to the inside of the corrugated cardboard sheet (hereinafter referred to as the sheet inner surface). It is planned to be arranged and fixed as a ruled line assisting member for crushing a step from the sheet inner surface side along the longitudinal direction of the ruled blade on the die base portion of each corrugated cardboard sheet punching die attached, A plurality of pressing portions that extend at a predetermined interval in the longitudinal direction and extend in a direction substantially parallel to the direction intersecting the direction (hereinafter referred to as the pressing portion forming direction), and connect these pressing portions in the longitudinal direction. And a pressing portion and the connecting portion are integrally formed to have a predetermined forming length in the longitudinal direction with a forming width continuous in the pressing portion forming direction. Do Line auxiliary member molded body.