Creasing member, creasing template, and creasing device

Abstract

According to the invention, crease lines for precisely folding a cardboard sheet are formed. One end of a belt-shaped metal member (11) is used as a creasing part (12), and the creasing part (12) is provided with an odd number of ridges (13a, 13b) extending in the length direction of the belt-shaped member (11) such that one ridge (13a) is provided at the center of the creasing part (12) in the width direction. Intersecting grooves (16) that are inclined with respect to the center ridge (13a) are formed on both sides of the center ridge (13a), which is provided at the center of the creasing part (12) in the width direction, at intervals in the length direction of the creasing part (12). The ridges (13b) provided on both sides of the center ridge (13a) are each segmented in the length direction to form segmented ridges (13c), forming a straight groove (20), discontinuous grooves (21), segmented ribs (22), and intersecting ribs (23) in the groove bottom of a crease line (L) that is formed by pressing the creasing part (12) into a cardboard sheet (A).

Description

technical field [0001] The present invention relates to a crease pressing member for pressing a crease line for bending on a corrugated cardboard sheet, thick paper, etc., a template equipped with the crease pressing member, and a crease pressing device. Background technique [0002] Among the corrugated paper sheets with lining boards attached to both sides of the corrugated corrugated medium paper, the corrugated corrugated medium paper with different wave heights, wave shapes, thickness, quality, etc., and thickness There are many types of combinations of different liners, such as quality and quality, and have various characteristics. By punching such a variety of corrugated cardboard sheets, for example, forming Figure 12 Blank A for corrugated cardboard box formation as shown 1 In the case of , on a board consisting of laminates, install a pair of blanks A 1 A shape punching knife for punching out the shape of the shape, and on the inner side of the shape punching kn...

AI Technical Summary

Problems solved by technology

[0014] However, in both Patent Documents 1 and 2, a panel having a pair of groove-shaped recesses is attached to a flat base arranged to face the formwork, and a sheet for pressing the crease press-in portion of the crease pressing member is used. Each pair of protruding parts presses the corrugated cardboard sheet into the above groove to form the crease line, so it is necessary to mount the panel on the base with high precision corresponding to the mounting position of the crease pressing member provided on the template, and the installation work is very time-consuming There is a problem of labor and high cost, and there is a problem that the position of the panel is misaligned due to the frequent formation of crease lines

[0015] In addition, since there are only two protruding parts for pressing the sheet, there are fewer pressing parts of the sheet, and especially when the width of the crease line is to be increased, the distance between the two protruding parts is widened, Therefore, either the spacer cannot be used to clean the sheet, so only blurred crease lines can be obtained. In order to eliminate this problem, it is necessary to provide a groove-shaped recess on the panel.

[0016] In addition, since unevenness is formed on both sides of the sheet in an unreasonable state, the surface of the sheet will be damaged, the strength of the sheet will be reduced, or the appearance will be deteriorated. loss of commodity value

[0017] In addition, in the crease pressing member described in Patent Document 1, since the concave groove provided at the central part in the width direction of the crease pressing part is V-shaped, and the grooves provided on both sides of the groove are used Because the pair of protruding parts of the pressing sheet is wedge-shaped with narrowed ends, the surface pressure of the corrugated cardboard sheet is high when it is unreasonably pressed, and the possibility of damage to the corrugated cardboard sheet is high.

[0018] On the other hand, in the crease pressing member described in Patent Document 2, there is a problem in that, since the two crease pressing members are respectively attached to the template to form the protruding portion, it is easy to cause a problem at the height position of the protruding portion. The height difference, because of the height difference, the crease indentation depths of the two crease lines are different, so that after bending the corrugated paper sheet, the corrugated paper sheet becomes bent along one crease line with a deeper crease indentation depth , but it is impossible to bend corrugated sheets with high precision

[0020] In addition, in both Patent Documents 1 and 2, no protruding portion is provided at the center of the crease press-fitting portion, so that the center of the formed crease line is not clear, so the corrugated cardboard sheet cannot be accurately folded at the center of the crease line.

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