JPH05177743A - Method and apparatus for forming a propensity for folding of band like material - Google Patents

Abstract

PURPOSE:To form a propensity for folding according to a crease by pushing the crease of a band like material into an annular groove of a guide roller by a method wherein a peripheral fringe of a disk is brought into pressure contact onto the crease of the band like material which advances by being hung on a guide roller wherein on the periphery an annular groove is formed, toward the annular groove under the crease of the band like material. CONSTITUTION:For a band like material 1 which advances by being hung on a guide roller 8, since a crossward positional shift on a flange 8 is prevented, a crease 2 certainly coincides with an annular groove 10 of the guide roller 8. Then, since a peripheral fringe 12 of a disk 11 is brought into pressure contact onto the crease 2 of the band like material 1 on the guide roller 8 toward an annular groove 10 under the crease 2, the crease 2 of the band like material 1 is pushed into the annular groove 10 with the peripheral fringe 12 and bent. Therefore, the crease 2 is made to form a propensity for folding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a pre-process for sandwiching a longitudinally-folded strip-shaped article from both sides in the longitudinal direction by a folding device and folding the strip-shaped article into the folds. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crease forming method and a crease forming device.

[0002]

2. Description of the Related Art When folding a strip into two in the longitudinal direction,
Generally, a band-shaped material is folded by an appropriate folding machine and then folded into two by a folding device. For example, in the case of manufacturing a paper container, a band-shaped packaging material having cardboard as a base and coated with a thermoplastic resin on both sides is preliminarily scored in the longitudinal direction, and is rolled and placed in a filling machine. The strip-shaped packaging material applied to the filling machine is pulled out from the roll, guided by a plurality of guide rollers, and sent to the folding device.
Here, the strip-shaped packaging material is sandwiched from both sides, folded into two pieces from the fold, and assembled downstream in sequence into a container.

[0003]

In the case of folding two belt-shaped products having a crease in the longitudinal direction in the above process, the belt-shaped products are
In the process of rolling the band-shaped material into a roll or in the process of being pulled out from the roll and traveling over a plurality of guide rollers, the folds are stretched and become almost flat, and the final guide roller and the folding device are There is a problem in that, when a band-shaped object is displaced in the lateral direction between them, a phenomenon in which the belt cannot be folded as it is may occur.

In view of the above points, the present invention gives a crease to a fold of a belt-like material which has been stretched in the process of traveling on a plurality of guide rollers to be in a nearly flat state before going to a folding device. ,
Provided are a folding method and a folding device for a belt-shaped object, which are intended to be folded even when a lateral displacement of the belt-shaped material occurs between a guide roller and a folding device. To do.

[0005]

In order to achieve the above object, the present invention provides a method of folding a belt-shaped article, in which a belt-shaped article having a longitudinal fold is formed on both sides in the longitudinal direction by a folding device. In the previous step of folding and folding the two strips from each other, an annular groove is formed on the outer circumference of a guide roller for guiding the strip to the folding device, and a disc is arranged so as to face the annular groove to guide the strip. The fold is applied to the roller so as to be aligned with the annular groove, and the outer peripheral edge of the disc is pressed against the fold of the belt-like material hung on the guide roller toward the annular groove of the guide roller. ..

Further, as a folding device, a belt-shaped article having a fold in the longitudinal direction is sandwiched from both sides in the longitudinal direction, and 2
An annular groove is formed on the outer circumference of the guide roller that guides the folding device that folds the sheet, at a position that matches the crease formed on the strip to be hung on the guide roller, and faces the annular groove of the guide roller. On the folds of the belt-like material hung on the guide rollers, a disk is arranged which presses the outer peripheral edge toward the annular groove.

[0007]

The strip-shaped material is formed by pressing the outer peripheral edge of the disk toward the annular groove below the fold of the strip on the fold of the strip that is advanced by being hung on the guide roller having the annular groove formed on the outer periphery. The folds are pushed into the annular groove of the guide roller by the outer peripheral edge of the disk and bent, and the creases are formed exactly as the folds.

[0008]

The present invention will now be described in detail with reference to the embodiments shown in the drawings. In the drawings, 1 is a band-shaped object having a constant width.
It advances at a constant speed in the direction of the arrow. The strip 1 is provided with folds 2 in the longitudinal direction, that is, the flow direction. 3 is a fold 2 to 2 that sandwiches the strip 1 from both sides in the longitudinal direction.
A folding device for folding a sheet, and a pair of feed rollers 4, 5
And a pair of folding rollers 6 and 7. 8
Is a guide roller which is arranged immediately before the folding device 3 and which guides the strip 1 to the folding device 3. A flange 9 is provided on both sides of the guide roller 8 to regulate both sides of the strip 1 and prevent the strip 1 from being displaced laterally on the guide roller 8.

Reference numeral 10 is an annular groove formed on the outer circumference of the guide roller 8. The annular groove 10 is formed at a position corresponding to the fold 2 formed on the strip 1 to be hung on the guide roller 8, and the groove width thereof is formed to be substantially the same as the width of the fold 2. Reference numeral 11 denotes a disk arranged so as to face the guide roller 8. The outer peripheral edge 12 of this disk 11
Faces the annular groove 10 formed on the outer periphery of the guide roller 8, and the thickness (width) thereof is the fold 2 formed on the strip 1.
The width is smaller than the width. The disk 11 is rotatably supported on a support frame 13 provided on a frame (not shown) and on the fold 2 of the strip 1 whose outer peripheral edge 12 is hung on the guide roller 8 and toward the annular groove 10. It is supported in pressure contact. The pressure contact force of the outer peripheral edge 12 of the disk 11 with respect to the fold 2 of the strip 1 and the position and angle of the disk 11 can be arbitrarily adjusted by operating the support frame 13 that supports the disk 11. Further, the pressing force of the outer peripheral edge 12 of the disk 11 against the fold 2 of the strip 1 is such that the fold 2 is pushed into the annular groove 10 of the guide roller 8 by the outer peripheral edge 12, and the fold 2 has a crease. As long as it is possible (FIG. 2), the degree depends on the thickness and rigidity of the strip 1 and the width and depth of the fold 2, and is not limited to any particular one.

However, the belt-shaped material 1 which is hung on the guide roller 8 and advances is prevented from being displaced laterally on the guide roller 8 by the flange 9.
The fold 2 surely coincides with the annular groove 10 of the guide roller 8. On the fold 2 of the strip 1 on the guide roller 8, the outer peripheral edge 12 of the disk 11 is placed on the annular groove 1 below the fold 2.
Since it is pressed toward 0, the fold 2 of the strip 1 is the outer peripheral edge 1
It is pushed into the annular groove 10 by 2 and bent, and the fold 2 is given a crease.

In this way, the strip 1 having the creases 2 is guided by the folding device 3, whereby the folding of the strip 1 by the folding device 3 is facilitated. Not only that, even if the belt 1 is displaced laterally while being guided by the folding device 3 from the guide roller 8, the folding habit attached to the fold 2 guides the folding position. , Ensure that the strip 1 is correctly folded from the fold 2.

[0012]

As described above, according to the present invention, the strip-shaped material which is preliminarily folded in the longitudinal direction is sandwiched from both sides in the longitudinal direction by the folding device, and the strip-shaped material is formed in the previous step of folding two sheets. Since the folding habit is added again to the fold of the article, the folding habit attached to this fold guides the folding position of the band-shaped article by the folding device, and the band-shaped article can be accurately and surely folded from the fold. ..

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an enlarged explanatory view showing a main part of the present invention.

[Explanation of symbols]

 1 band 2 fold 3 folding device 8 guide roller 10 annular groove 11 disk 12 outer peripheral edge

Claims (3)

[Claims] 1. In a pre-process of folding a belt-shaped article having a fold in the longitudinal direction from both sides in the longitudinal direction by a folding device and folding it into two sheets, the outer periphery of a guide roller for guiding the belt-shaped article to the folding device. An annular groove is formed, and a disk is arranged so as to face the annular groove, and the belt-shaped material is hung on a guide roller so that the folds thereof are aligned with the annular groove. A method for fold-folding a strip-shaped article, which comprises pressing the outer peripheral edge of the disk toward the annular groove of the guide roller onto the fold of the article. 2. A strip-shaped article, which is folded in the longitudinal direction, is attached to the outer periphery of a guide roller which guides a folding device that sandwiches the strip from both sides in the longitudinal direction and folds it into two sheets. A disc that forms an annular groove at a position that coincides with the formed fold, faces the annular groove of this guide roller, and presses the outer peripheral edge toward the annular groove on the fold of the belt-shaped material hung on the guide roller. An apparatus for folding a band-shaped article, characterized in that 3. The width of the annular groove formed in the guide roller is substantially the same as the width of the fold formed on the strip, and the thickness of the outer peripheral edge of the disk is smaller than the width of the fold of the strip. The apparatus for folding a belt-like article according to claim 2, wherein