JPH0740133U - Push rule for forming ruled lines - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a pressed ruled line that can be bent at a predetermined position and becomes a ruled line groove that can obtain a straight folding curve. [Structure] The lower end surface for forming a crease groove is formed into a flat portion 11, the corner portion is formed into a rounded portion 12, and the flat portion 11 in the central portion is further formed with a pressing ridge 1 in which a small projection strip 13 is projected downward. . The width of the lower end surface of the pressed ruled line 1 is approximately 2.8 mm, and the length thereof is the length of the ruled line groove provided on the corrugated cardboard or the like. The width of the small projection strip 13 is 0.8 mm, and the projecting length thereof is 1 mm, which projects in the longitudinal direction of the lower end surface of the pressing rule 1. Attach the pressed ruled line 1 to the Thomson shape,
Is to be pressed at the same time as the cutting, to form the ruled groove 20.
The shape of the ruled line groove 20 is such that the inner surface has a flat portion 21 and an inclined portion 22.
A guide groove 23 is provided in the center of the flat portion 21 on the inner bottom surface by the small projection strip 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ruled line attached to a Thomson type or rotary die cutter.

[0002]

[Prior art]

 Conventionally, as a means for making a crease groove (a crease groove for bending, hereafter simply referred to as a crease groove) on thick paper such as corrugated board, plate ball, etc., a Thompson type or rotary die cutter is provided with a pressing rule, It is well known that, as shown in FIG. 7, the ruled line is pressed together with the cutting die cutting by the cutting blade. However, when the width of the crease groove was large, it could not be bent from the center depending on the load or operation, and it was often bent from the end of the crease groove or from both ends. When bent from this end, the dimensional accuracy was misaligned, and when bent from both ends, two bending curves were produced, and each bending curve was not straight and had an unsightly appearance. Of.

[0003]

[Problems to be solved by the device]

 Therefore, the present invention provides a pushing ruled line that is a ruled line groove that can be bent at a predetermined position to obtain a straight folding curve.

[0004]

[Means for Solving the Problems]

 For this reason, the present invention presses a crease groove on thick paper such as corrugated board, plate ball, etc., and a small projection strip is projected on the end face for forming the crease groove along the longitudinal direction. It is a push rule of success. In addition, it is appropriate that the width of the small projection strip is one third or less of the width of the ruled line groove.

[0005]

[Action]

 Since the small projection strip is provided on the end face, a guide groove formed by the small projection strip is further formed in the ruled line groove applied by the pressing to form a two-step concave strip. The bent portion is guided by the guide groove formed by the small protruding strip, and a straight bending curve is obtained.

[0006]

【Example】

 Hereinafter, the details of the present invention will be described with reference to the illustrated embodiments. The pressed ruled line 1 of this example shown in FIG. 1 has a flat portion 11 at the lower end surface, a rounded portion 12 at the corner, and a small projection strip 13 protruding downward from the flat portion 11 at the center. Is.

The width of the lower end surface of the pressed ruled line 1 is about 2.8 mm, and the length thereof is the length of a ruled line groove provided on a corrugated board or the like. Further, the width of the small projection strip 13 is 0.8 mm, and the projecting length thereof is 1 mm, which is projected in the longitudinal direction of the lower end surface of the pressing rule 1.

The pressed ruled line 1 of this example is mounted on a Thomson mold and is pressed simultaneously with the cutting of the corrugated board 2 to form a ruled line groove 20. As shown in FIG. In the shape of 20, the flat part 21 of the ruled line 1 forms a flat part 21 on the inner bottom surface, and subsequently, the rounded part 12 forms an inclined part 22 to be recessed.

What is characteristic of this example is that the guide groove 23 is formed in the center of the flat portion 21 on the inner bottom surface by the small projection strip 13. That is, a two-step concave band is formed by the flat portion 21 and the guide groove 23.

Therefore, according to this example, as shown in FIGS. 2 and 3, since the bent portion is guided by the guide groove 23, a straight folding curve 24 along the guide groove 23 is always obtained.

Although the present example is configured as described above, the present invention is not limited to this. For example, the shape of the pressing end surface of the pressing rule does not matter, and it may be a gentle curved surface as shown in FIG. Further, if the width of the pressing end surface of the pressing rule is increased, the overlapping state at the time of bending can be improved and an excessive force is not applied to the bent portion, so that the deformation can be prevented as shown in FIG.

Furthermore, the shape of the small projection strip is appropriate, and the small projection strip may be intermittently provided along the longitudinal direction of the ruled groove forming end face. In this case, the guide groove of the ruled line groove is also intermittent, but there is no problem in guiding the bending. The width of the small projection strips is not limited, but is optimally one third or less of the ruled groove width. Incidentally, the pressing rule of the present invention may be configured as shown in FIG. 6 besides the Thomson type and attached to the rotary die cutter. In addition to the corrugated ball, the material for forming the ruled groove may be a thick material such as a plate ball and various plastic materials.

[0013]

[Effect of device]

 According to the present invention, since the guide groove formed by the small projection strip is further provided in the crease groove, the bent portion is guided, the fold can be performed easily and quickly, and a straight fold curve can be obtained to provide a good appearance. Of. Further, in the second aspect, the guide groove having an appropriate width is formed, and the guide groove is more easily bent.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention.

FIG. 2 is a front view of the obtained corrugated cardboard at the beginning of bending of the ruled line grooves.

FIG. 3 is a front view of the corrugated cardboard bent along the obtained ruled line grooves.

FIG. 4 is a vertical cross-sectional front view showing formation of ruled line grooves and guide grooves according to another example.

FIG. 5 is a front view of the plate ball bent along the obtained ruled line groove.

FIG. 6 is a perspective view of still another example mounted on the rotary die cutter.

FIG. 7 is a vertical cross-sectional front view of a conventional pressed ruled line and an obtained ruled line groove.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Push rule 11 Flat part 12 Earl part 13 Small projection strip 20 Ruled line groove 21 Flat part 22 Inclined part 23 Guide groove 24 Folding curve

Claims (2)

[Scope of utility model registration request] 1. A method for pressing a ruled groove on a thick paper such as a corrugated board, a plate ball, etc., wherein a small projection strip is projected on the end face for forming the ruled groove along the longitudinal direction. Push rule for forming ruled lines. 2. The pressed ruled line according to claim 1, wherein the width of the small projection strip is one third or less of the width of the ruled line groove.