JPH09242324A - Marking-off tool for flexible sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent exposure to a surface of a marking-off line, and to facilitate machining by forming a marking-off tool for a flexible sheet of an edge section consisting of a large number of rotary edges with discontinuous cutting edges, a support shaft supporting the rotation of the edge section, a connecting section continuing a handle and the support shaft, and the handle and mounting the places of the cutting edges of each rotary edge at places displaced from the places of the cutting edges of the adjacent rotary edges. SOLUTION: The edge sections of rotary edges 11 are formed of a disk, in which edge sections and notched sections are formed alternately to an outer circumferential section, and constituted of a disk group, in which the disks are installed at regular intervals. The rotary edges 11 with discontinuous cutting edges are fixed onto a shaft 12 so that the relative places of each rotary edge 11 are not broken, and both ends of the shaft 12 are fastened rotatably onto a connecting section 13 connected to a handle 14. The length of marking-off lines is set normally in 2.0-20.0mm, preferably 3.0-10.0mm, the intervals of the marking-off lines in 2.0-10.0mm, preferably 3.0-5.0mm and notch depth in an extent that 1/2 or 1/5, preferably 1/3-1/4 of the thickness of a flexible sheet is notched.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a scoring tool for a flexible sheet.

[0002]

2. Description of the Related Art When a flexible sheet, particularly a thick plastic sheet, for example, a long plastic sheet-like floor material is raised on a wall at the end of a sheet to perform construction, when the sheet is thick or the temperature is low. The sheet does not fit well in the corners between the floor and the wall, and even if it is forcibly pressed against the corners, the adhesive often peels off before it is sufficiently rubbed, resulting in poor finish and working time. There was a problem that it cost.

In order to solve this problem, an invention described in Japanese Patent Application No. 55-148323 (Japanese Utility Model Application Laid-Open No. 57-73091) described in the microfilm has been proposed. According to this technique, as shown in FIG. 5, "a tubular grip portion 1 and a housing portion 2 composed of a remaining upper half obtained by cutting out a substantially lower half of the tubular portion and a plurality of claw-shaped portions in the housing portion. An inscribing tool for a flexible sheet, characterized in that the blade 3 is mounted and fixed, and the seat contact portion of the housing section forms a radius and the tip of the claw-shaped blade is partially exposed from the radius. " Is proposed.

Certainly, with the present invention, it becomes possible to process a sheet so that it can be bent easily. However, in the sheet processed in this way, the "scoring line" cut by the claw-shaped blade is on the front side. Since it appeared, it was difficult to say that it had an ideal finish.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a novel flexibility that enables "scribing" without the "scribing line" formed on the back surface of the flexible sheet appearing on the front side. The point is to provide a scribing tool for sheets.

[0006]

According to the present invention, there are provided (a) a blade portion comprising a plurality of rotary blades having discontinuous blade edges, (b) a support shaft for supporting the rotation of the blade portion, and (c) the support. A scribing tool for a flexible sheet, comprising: a connecting portion that holds a shaft and that connects the support shaft and the grip; and (d) a grip that fixes the connecting portion.

The blade tip position of each rotary blade is preferably provided at a position deviated from the blade tip position of an adjacent rotary blade. As a result, the flexibility of the flexible sheet after scribing is increased as compared with the case where the scribing is provided at the same position, and the possibility that a scribing line appears on the surface is further reduced.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The configuration of the blade portion may be any shape as long as the requirements of the claims are satisfied.
As one example, there is a blade portion composed of a group of discs in which a large number of discs (see FIG. 2) in which blade portions 15 and notch portions 16 are alternately provided on the outer peripheral portion are integrated at regular intervals. .

As another example, there is a blade portion composed of a rotary drum blade in which a blade group similar to the blade group composed of the disk group is fixed on a rotary drum.

FIG. 1 schematically shows an example of a scribing tool for a flexible sheet according to the present invention. Reference numeral 11 denotes a rotary blade having a discontinuous blade tip, and the individual rotary blades 11 are firmly fixed to the rotary shaft 12 so that the relative relationship between the individual rotary blades 11 is not broken. Both ends of the rotating shaft 12 are rotatably fixed to a connecting portion 13 connected to a handle 14.

An example of a flexible sheet scribed by using the scribing tool for a flexible sheet of the present invention is shown in FIGS. 3 and 4.
3 is a plan view of the scribed flexible sheet as viewed from the back surface, and FIG. 4 is a cross-sectional view taken along line XX of FIG. FIG.
Shows an example of a typical flexible sheet.
Is a surface layer made of a vinyl chloride resin sheet, 24 is a polyurethane foam layer, 25 is a vinyl chloride resin sheet, a nonwoven fabric or a back layer made of a nonwoven fabric, and 22 is a scribe line. The length (corresponding to the length of the blade) n (see FIG. 3) of the scribing portion in the longitudinal direction of the scribing line 22 is usually 2.0 to 20.0 mm, preferably 3.0 to 10.
It is 0 mm, and the distance m between the marking lines is usually 2.
It is 0 to 10.0 mm, preferably 3.0 to 5.0 mm. Also, the depth of cut p due to scribing (see Fig. 4)
Depends on the depth of the notch portion 16 of the blade, but is usually 1/2 to 1/5, preferably 1/3 of the thickness of the flexible sheet.
It is preferable to cut to about 1/4.

[0012]

By using the scribing tool for a flexible sheet of the present invention, since the scribing line does not appear on the surface, ideal bending of the flexible sheet can be easily realized. The scribing tool for a flexible sheet of the present invention has a simple structure, and by using it, anyone can easily perform reproducible processing without skill.

[Brief description of drawings]

FIG. 1 is a front view schematically showing a scribing tool for a flexible sheet of the present invention.

FIG. 2 is a plan view showing an example of a rotary blade that can be used in the scribing tool for a flexible sheet of the present invention.

FIG. 3 is a plan view of the back surface of a flexible sheet scribed using the scribing tool for a flexible sheet of the present invention.

FIG. 4 is a sectional view taken along line XX of FIG. 3;

FIG. 5 is a perspective view of a conventional scribing tool for a flexible sheet.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Gripping part 2 Housing part 3 Claw-shaped blade 4 Holding tool 5 Screw 11 Rotating blade 12 Rotating shaft 13 Connecting part 14 Handle 15 Blade part 16 Notch part 21 Flexible sheet 22 Scribing line 23 Flexible Front layer of sheet 24 Intermediate layer of flexible sheet (for example, polyurethane-based foam layer) 25 Back layer of flexible sheet

Claims (2)

[Claims] 1. (a) A blade portion comprising a plurality of rotary blades having discontinuous blade edges, (b) a support shaft for supporting the rotation of the blade portion, (c) a support shaft for holding the support shaft, and A scribing tool for a flexible sheet, comprising: a connecting portion for connecting a handle and (d) a handle to which the connecting portion is fixed. 2. The scribe tool for a flexible sheet according to claim 1, wherein the blade tip position of each rotary blade is provided at a position deviated from the blade tip position of an adjacent rotary blade.