JP3486262B2 - Crease groove forming body and crease ruled line - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scoring groove forming body and a scoring ruled line, and more particularly to a scoring case for forming an accurate line on a corrugated cardboard sheet which is a fold line during folding. The present invention relates to a groove forming body and a ruled line.

[0002]

2. Description of the Related Art Conventionally, when a packaging container made of corrugated cardboard is manufactured, a blank as a corrugated board material is cut into a predetermined shape by a punching-type cutting blade, and a bent portion is formed on the blank by a ruled line. Alternatively, it is configured to form streak lines to be convoluted parts, and bend or fold along these streak lines to glue a predetermined part to form a body. In this case, a tape-shaped groove forming body for tape forming, which cooperates with the scoring lines to form the scoring lines on the blank, is used to impress the scoring lines that are accurate and useful for bending. It is stuck on the surface of the mold.

A conventional groove forming body for ruled lines 100 of this type is shown in FIG.
Is shown in. In the example of FIG. 7, the base sheet 10
Two groove forming members 102 are fixed in parallel to each other on a front surface of the sheet 1 at regular intervals to form a ruled groove 103 between the two groove forming members 102, and the back surface of the base sheet 101 is pressure-sensitive bonded. Lower mold (receiving mold) board surface 1 through the agent layer 104
It is configured to be attached on the 05. Then, the upper die (push die) 10 is placed so as to face the ruled line pressing groove 103.
6 is provided with a ruled line, and the blank is placed on the lower mold surface 105 and the upper die 106 is lowered, whereby the blank is pressed into the groove 103 by the ruled line 107, A streak line is formed at a required portion.

[0004]

However, the shapes of the conventional groove forming body for ruled lines and the ruled line are as shown in FIG.
As shown in the left side of (a), when the ruled line 107a is in a position facing the concave portion of the core 109 of the corrugated cardboard sheet 108, the corrugated cardboard sheet 108 is substantially omitted as shown in the left side of FIG. 8 (b). Although the squeezing is performed symmetrically to form a striated line, as shown on the right side of FIG. 8A, when the ruled line scoring line 107b is in a position facing the convex portion of the center core 109, The shape of the streak lines formed as shown on the right side of FIG. When the corrugated cardboard sheet 108 is bent with the creases formed as described above as a crease, no particular problem occurs at the 90 ° bending portion, but at the 180 ° bending portion, as shown in FIG. Corner part 1 on the inside of the bent part
When the 10, 111 contact with each other, the bent portion becomes uncertain, and the bending failure as shown in FIG. 8D occurs.

As a result, as shown in FIG.
The glue strip 113 to form 12
When affixed to the affixing part corresponding to, the joint part has a gap (FIG. 9 (a)), an overlap (FIG. 9 (b)), and a joint shift (FIG.
(C)) and the like occur, and there is a problem in that the inner and outer dimensions of the finished body 112 are not uniform.
In order to eliminate the occurrence of such defective products, the presence or absence of various defective products as shown in FIGS. 9A to 9C is inspected immediately after gluing, and if defective products are found, before the adhesive dries. The reality is that the glued areas are peeled off and reattached manually. However, this re-adhesion work is time-consuming and extremely inefficient, which is a bottleneck in the mechanization of the manufacturing process.

In order to solve the above problems, the present invention provides a corrugated board material such as a corrugated board sheet so that it can be bent accurately along the fold line. It is to provide a groove forming body for forming a line and a line for forming a line.

[0007]

In order to achieve the above-mentioned object, the groove forming body for scoring according to the present invention cooperates with a scoring ruled line to fold a corrugated board material exceeding 90 °. muscle lines for folding up the bending angle a ruling押用groove forming member for forming on the cardboard sheet on the one mutually
A first groove forming body provided in parallel at a constant interval;
A second groove forming body, and the first groove forming body and the second groove forming body.
It is arranged in the middle of the groove forming body in parallel with each of the groove forming bodies.
Provided between the third groove forming body and each groove forming body adjacent to each other.
And two parallel grooves that are parallel to each other.
The groove is formed on each of the two ridges provided on the ruled line.
It is characterized in that they are provided so as to face each other.

In the groove forming body for stamping according to the present invention, two parallel slits are provided so as to face the two protruding strips of the stamped ruled line, so that one surface of the corrugated board material is formed. Two parallel streak lines are formed on one side, and one streak line is formed on the other surface side of the corrugated board material so as to be located at the center of these two streak lines. Thus
When folding this corrugated board material, if the other side is the outer side, the bending starts first with the single line on the other side as the bending center line, and then the single line. Bending is performed with two concave portions on both sides sandwiching the portion as folding lines. At this time, the convex portion formed inside the folding center line escapes into the inner space, and the concave portion outside the folding center line is pulled to both sides to determine the folding center line. Accurate creases around a single centerline. Therefore, it is possible to accurately fold along the fold line regardless of the contact position of the ruled line.

It is preferable that the line forming groove forming body of the present invention has a base sheet adhered to a receiving type board surface and a groove forming member fixed to the surface of the base sheet.

Next, the creased ruled line according to the present invention cooperates with the creasing groove forming body to form a streak for bending the corrugated board material to a bending angle exceeding 90 ° on the corrugated board material. A ruled line to be formed, wherein the groove for forming the ruled line is formed.
The bodies are parallel to each other at regular intervals.
Groove forming body, second groove forming body, and first groove forming body
The respective groove forming bodies at the intermediate portion of the body and the second groove forming body.
Third groove forming bodies arranged in parallel and each groove adjacent to each other
With two parallel grooves provided between the forming bodies
Te becomes and is characterized by comprising providing a parallel two ridges to each other so as to face the two of grooves provided in the ruling押用groove forming member.

According to the ruled line of the present invention, the same effect as described above is achieved in cooperation with the groove forming body for ruled line.

The ruled line of the present invention comprises a first ruled line portion and a second ruled line portion provided on both sides so as to form the two ridges, and a first ruled line portion and a second ruled line portion. It is preferable that the third ruled line portion is sandwiched between the intermediate portions. By doing so, it is possible to apply to various corrugated board materials having various materials and thicknesses by appropriately adjusting the height and width of the third ruled line portion.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, specific examples of the groove forming body for ruled lines and the ruled line of the invention will be described with reference to the drawings.

Ruled line groove forming body 1 according to one embodiment of the present invention
A cross-sectional view of is shown in FIG. In the line forming groove forming body 1 of the present embodiment, the first groove forming member 3 and the second groove forming member 4 are fixed in parallel to each other on the surface of the base sheet 2 at regular intervals. A third groove forming member 5 having the same height as those of the groove forming members 3 and 4 is fixed in parallel to an intermediate portion between the first and second groove forming members 3 and 4,
Ruled line pressing grooves (row grooves) 6 and 7 are formed between the groove forming members 3, 5; A pressure sensitive adhesive layer 9 covered with a release paper 8 for protection when not in use is provided on the back surface of the base sheet 2. Further, a gutter-shaped ruled line setting guide 10 is fitted into the ruled line pressing grooves 6 and 7.

The ruled line setting guide 10 includes a ruled line pressing groove 6,
In the state of being fitted to 7, the flange edge pieces projecting to both sides come into contact with the upper surfaces of the first and second groove forming members 3 and 4, and the set groove 1 formed in the central portion of the upper surface.
1 has a width substantially equal to the thickness of the ruled line 12 (see FIG. 2). In addition, an entry groove 13 of the third groove forming member 5 is formed on the bottom surface of the ruled line setting guide 10. The recessed groove 13 also contributes to exhibiting elasticity that provides flexibility when the ruled line setting guide 10 is fitted into the ruled line pressing grooves 6 and 7.

On the upper surfaces of the first and second groove forming members 3 and 4 and the ruled line setting guide 10, a joining tape 14 such as cellophane tape is stuck in the length direction. Thus, the fitted state of the ruled line setting guide 10 in the ruled line pressing grooves 6 and 7 is maintained. The line forming groove forming body 1 is configured as an elongated body extending in a direction orthogonal to the paper surface, and is cut into an appropriate length for use.

On the other hand, as shown in FIG. 2, the ruled line 12 to be mounted on the upper die (push die) 15 formed of plywood has first ruled line portions 12a and 12a provided on both sides. The first ruled line portion 1 is composed of a second ruled line portion 12b and a third ruled line portion 12c serving as a spacer sandwiched between the first and second ruled line portions 12a and 12b.
2a and the tip of the second ruled line portion 12b form protrusions 16 and 17 protruding downward, and the tip of the third ruled line portion 12c is slightly wider than the third groove forming member 5. It constitutes the bottom surface of the groove portion 18. When the ruled line 12 is divided into shapes as described above, the width and height of the third ruled portion 12c are appropriately changed so that the width of the ruled line and the depth of the groove 18 can be adjusted according to the material and thickness of the corrugated board sheet. Can be adjusted accordingly. The third ruled line portion 12
It is possible to change the degree of crushing of the folding center of the corrugated board sheet depending on the degree of protrusion of the tip of c.

When using the ruled line forming groove 1 of the present embodiment, as shown in FIG. 2, the leading end of the ruled line 12 is fitted into the set groove 11 of the line setting guide 10 and the base is in this state. By removing the release paper 8 on the back surface of the sheet 2 and exposing the pressure-sensitive adhesive layer 9 to the upper mold 15 with the ruled line 12 attached thereto, the upper mold 15 is struck on the lower (receiving) plate surface 19 The groove forming body 1 is fixed to a required position on the lower mold plate surface 19. Next, when the upper die 15 is operated to raise the ruled line 14, the ruled line setting guide 10 is separated from the ruled line 12 and is left inserted and left in the ruled grooves 6, 7. After this, the joining tape 1 that has stabilized the ruled line setting guide 10
4 is peeled off and the ruled line setting guide 10 is lifted and removed, whereby the groove forming members 3, 4 and 5 are moved to the lower mold plate surface 19
It is installed on the upper side and the ruled lines 6 and 7 are formed.

In this way, the groove forming members 3, 4, 5 installed on the lower mold surface 19 and the ruled line 12 of the upper mold 15.
FIG. 3 shows a state in which a fold line is formed on the corrugated cardboard sheet 20 by the above. As shown in FIG. 3, when the ruled line 14 is pressed against the groove forming members 3, 4, and 5 with the corrugated cardboard sheet 20 interposed therebetween, the third groove forming member 5 and the groove portion 18 of the ruled line 12 are formed. Thus, one streak line 21 serving as a folding center line is formed on the surface (outer surface) side of the corrugated cardboard sheet 20.
(See FIG. 4A) is formed, and at the same time as this formation, the back surface of the corrugated cardboard sheet 20 is formed by the ridges 16 and the grooved lines 6 of the lined creases 12 and the ridges 17 and the lined grooves 7. Two streak lines 22 and 23 (see FIG. 4A) are formed on the (inner surface) side. In addition, on the front surface side of the corrugated cardboard sheet 20, recesses 24 and 25 are formed on both sides of the line 21.
Is formed.

When the corrugated cardboard sheet 20 having the lines 21, 22 and 23 formed in this manner is bent with the lines 21 on the outside, as shown in FIG. Bending is started with the line 21 as a folding center line, and then the folding is performed with the recesses 24 and 25 on both sides as folding lines. In this way, the bending stress applied to the corrugated cardboard sheet 20 at the time of bending is distributed to the three bending lines of the streak line 21 and the concave portions 24 and 25 to perform the bending, and the streak line 2 in the central portion 2
Bending is performed symmetrically around 1 (FIG. 4C).
reference). At the time of this bending, as shown in FIG.
Convex portion C formed inside the streak line 21 serving as the bending center line
Escapes into the inner space, and the concave portion D on the outside of the bending center line is pulled to both sides (vertical direction in the figure) to determine the bending center line, and the distance A along the bending outer peripheral portion The distance B along the inner peripheral portion becomes substantially the same, and the crease is accurately made about the muscle line 21 (point D).

The three muscle lines 21, 22, 23 as described above
In the case of the body 26 as shown in FIG. 5, the fold line is formed by the second ruled line 27 and the fourth ruled line 28. The reason for this is that, in the process of manufacturing the box body 26, when the adhesive margin piece 29 is adhered to the adhesive portion 30 of the side plate portion corresponding to the adhesive margin piece 29, these No. 2 rule 27 and No. 4 rule This is because 28 and 28 are bent by 180 ° (see FIG. 5B). Since the first ruled line 31 and the third ruled line 32 are bent and bent up by 90 ° after being attached, there is little possibility of a bending failure. Of course, the 1st ruled line 31 and the 3rd ruled line 32 may be formed with the same lines as the 2nd ruled line 27 and the 4th ruled line 28.

In the present embodiment, a flat lower plate 1
Although the reciprocating type in which the upper die 15 reciprocates with respect to 9 has been described, the upper die 15 and the lower die platen 19 may be of the rotary type.

In the present embodiment, the third groove forming member 5 provided in the central portion is formed to have a square cross section, but the third groove forming member has a semicircular or semielliptical cross section. Is also good. The height of the third groove forming member does not necessarily have to be the same as that of the first and second groove forming members, and is set to an appropriate height according to the material and thickness of the corrugated board sheet. be able to. In addition, in this embodiment, the first
Although the third groove forming members 3, 4, 5 are formed separately, the groove forming members 3, 4, 5 may be integrally formed.

As a modified example of the ruled line for ruled line 12 of the present embodiment, those shown in FIGS. 6A and 6B can be used. The ruled line 41 shown in FIG. 6 (a) is formed by integrally molding the first to third ruled line portions in this embodiment. The ruled line 42 shown in FIG. 6 (b) has a flat lower surface of a third ruled portion 42c provided between the first ruled line portion 42a and the second ruled line portion 42b. Is.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a ruled line forming groove forming body according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a groove forming body for ruled lines is set on a ruled line.

FIG. 3 is a cross-sectional view showing a state in which a fold line is formed on a corrugated board sheet.

4 (a), (b), (c), and (d) are views for explaining a folded state of a corrugated board sheet.

5 (a) and 5 (b) are views for explaining a process of forming a body.

6A and 6B are diagrams showing modified examples of ruled line.

FIG. 7 is a cross-sectional view of a conventional ruled line forming groove forming body.

8 (a), (b), (c), and (d) are views for explaining problems in the conventional groove forming body for ruled lines.

9 (a), (b) and (c) are views for explaining a problem at the time of forming a body using a conventional groove forming body for ruled lines.

[Explanation of symbols]

1 Groove forming body for stamping 2 base sheet 3 First groove forming member 4 Second groove forming member 5 Third groove forming member 6,7 Ruled line groove 12, 41, 42 Ruled line 12a, 42a First ruled line portion 12b, 42b Second ruled line portion 12c, 42c Third ruled line part 15 Upper mold (push mold) 16, 17 ridges 18 Groove 19 Lower mold plate 20 Cardboard sheet 21,22,23 Streaks 24,25 recess 26 body

Claims (4)

(57) [Claims] 1. A creasing groove forming body for forming a corrugated line on a corrugated board material for bending a corrugated board material to a bending angle exceeding 90 ° in cooperation with a corrugated board ruled line, First grooves provided in parallel with each other at a constant interval
Forming body and second groove forming body, and these first groove forming body
And each of the groove forming bodies is flat in the middle of the second groove forming body.
Third groove forming bodies arranged in rows and each groove shape adjacent to each other
With two parallel grooves provided between the adults,
These two grooves are provided on the ruled line.
A ruled groove forming body, which is provided so as to face each of the ridges. 2. A groove forming member for forming a ruled line according to claim 1, further comprising: a base sheet attached to a receiving surface of the board, and a groove forming member fixed to a surface of the base sheet. body. 3. A ruled line for forming corrugated lines on the corrugated board material for bending the corrugated board material to a bending angle of more than 90 ° in cooperation with the corrugated board groove forming body, The groove forming members for ruled lines are flatly spaced from each other at a constant interval.
First groove forming body and second groove forming body provided in a row
And the middle of the first groove forming body and the second groove forming body
Third groove forming body arranged in parallel with the groove forming bodies
And the flat surfaces provided between the groove formations adjacent to each other.
And two projections parallel to each other are provided so as to face the two projections provided in the groove forming body for ruled lines, respectively. Press the ruled line. 4. A first ruled line portion and a second ruled line portion provided on both sides so as to form the two ridges, and sandwiched between an intermediate portion between these first and second ruled line portions. The ruled line of claim 3, wherein the ruled line comprises a third ruled line portion.