JPS6117823Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of the rod-shaped sandpaper pattern, and since it can be used while sequentially shifting the sandpaper as the sandpaper wears,
The object of the present invention is to provide a sandpaper pattern sandpaper having an efficient structure in which almost the entire surface of the sandpaper can be used.

A sandpaper sandpaper, as shown in the central vertical cross-sectional view shown in FIG. 4, is commercially available, in which sandpaper 12 is attached to both sides of one end of a rod-shaped support 14 with a support 13. This type of file is widely used because the file paper 12 can be replaced compared to the conventional rod-shaped file. However, with this type of conventional sandpaper paper, only a limited portion from the tip to the center is used; the remaining portion, approximately one-third of the sandpaper near the handle, is not used. In most cases, they were replaced with new ones without any problems, resulting in a lot of waste. This means that
The same applies to a structure in which a grinding band of a predetermined length is fixed to the tongue near both ends, as proposed in Japanese Patent Application Laid-open No. 55-42792. In addition, the area near the tip, which is used most frequently, is subject to severe wear and becomes unusable in a short period of time, so it is often necessary to change the area where it is used, which reduces work efficiency and often results in an unsatisfactory finish. .

The present invention solves the above-mentioned drawbacks of the conventional sandpaper pattern sandpaper by providing a structure as shown below. The structural features of the present invention are as follows. In other words, a grip part with a hollow cylindrical or channel-shaped cross section, a tapered strip-shaped support rod with a thicker base side inserted into the grip, and an endless rod wrapped around the longitudinal outer circumference of the support rod. The structure consists of tape-shaped file paper and a fixing device for the grip hand between the file paper and the support rod. It is characterized by the use of sandpaper that is clamped and fixed in the large diameter part.

This will be explained in detail below with reference to the drawings.

1 to 3 are illustrations of the present invention, and the first
Figures A and B show the first embodiment, where A is a plan view and B
is a central vertical sectional view. FIG. 2 is a central vertical sectional view showing the second embodiment. 3A and 3B show a third embodiment, where A is a perspective view and B is a central vertical sectional view.

In any of these embodiments, the most distinctive feature of the present invention is that tape-shaped file paper 2 is endlessly wrapped around the strip-shaped support rod 1 in its longitudinal direction. In the present invention, the strip-shaped support rod 1 wrapped with the tape-shaped file paper 2 is inserted into the grip 3. In the examples shown in FIGS. 1 and 2, the handle 3 has a lipped channel-like cross section with one side open. In the third embodiment shown in FIG. 3, the handle 3 has a rectangular hollow cylindrical cross section, and its inner diameter gradually increases from one end to the other end. With such a structure, in either example, the strip-shaped support rod to which the tape-shaped file paper is attached can slide inside the grip.

In the present invention, a fixture 4 is further used to secure the strip-shaped support rod 1 to which the file paper 2 is attached to the gripping hand 3. The fixing device 4 can be used as desired by changing the shape from conventionally known fixing methods, and in the four examples of the fixing device shown in FIG. screw 5
When turned, the tip pushes the file paper 2 and the strip-shaped support rod 1, making it possible to fix them. In the example shown in FIG. 2, the support plate 7 has one end fixed to the inside of the grip 3, and the wedge plate 15 attached to the lower part of the button 8, which can be moved back and forth, is connected to the inner wall of the grip 3 and the support plate 7. When the button 8 is moved forward as shown by the solid line, the support plate 7 is placed between the wedge plates 1 and 1.
5 to fix the grip between the grip 3 and the strip-shaped support rod 1, and when the button 8 is pushed back as shown by the two-dot chain line, it is released and the strip-shaped support rod 1 can freely slide.

The fixing device 4 in the example shown in FIG. 3 has a slightly different structure from the previous ones, and the strip-shaped support rod 1 has a thickness that gradually changes from the tip (left end in the drawing) to the rear end. The inner diameter of the grip 3 is similarly changed. A locking groove 9 is provided on both sides of the rear end of the grip 3, into which a lip groove-shaped locking fitting 10 is fitted. Locking metal fitting 10
A thumbscrew 11 is screwed into the center of the thumbscrew 11, and the end of this thumbscrew 11 comes into contact with the strip-shaped support rod 1, and when the thumbscrew 11 is screwed in, the strip-shaped support rod 1 wrapped with sandpaper is gripped. It is pressed and fixed in close contact with the inner wall of the hand 3.

In the illustrated examples, the tape-shaped sandpaper used in the present invention is of an endless type, and its outer periphery is somewhat larger than the strip-shaped support rod 1. The material of the sandpaper is diamond sand,
A commercial product made by adhering glass powder or the like to paper, cloth, etc. may be used, and this is cut into a width of 8 to 25 mm to form an endless tape.

The strip-shaped support rod 1 can be made of any material such as plastic, metal such as aluminum, bamboo, wood, etc. as long as it has sufficient strength against the bending moment during use. As for its shape, a rectangular shape that is thinner or narrower toward the tip is easy to use for grinding and polishing work. Also, a stepped tape with a handle that widens the width in stages and widens the handle portion to the widest point is also convenient because it can be used according to the tape width even if the tape width changes.

The present invention has the above-described structure, and since the sandpaper is sequentially shifted as it wears, there is no waste and the workability is good.

[Brief explanation of the drawing]

1 to 3 are illustrations of the present invention, and the first
Figures A and B show the first embodiment, where A is a plan view and B
is a central vertical sectional view. FIG. 2 is a central vertical sectional view of the second embodiment. 3A and 3B show a third embodiment, where A is a perspective view and B is a central vertical sectional view. FIG. 4 is a central vertical cross-sectional view of a conventional sandpaper pattern. 1...Strip-shaped support rod, 2...Endless tape-shaped file paper, 3...Gripping hand,
4...Fixing tool, 5...Screw, 6, 7...Support plate,
8... Button, 9... Locking groove, 10... Locking metal fitting, 11... Thumb screw, 12... Conventional file paper, 13... Support, 14... Rod-shaped support, 1
5... Wedge board.

Claims (1)

[Scope of utility model registration request] A grip 3 having a hollow cylindrical or channel-shaped cross section;
A strip-shaped support rod 1 that is inserted into the grip hand and whose base side is tapered thick, an endless tape-shaped file paper 2 that is wound around the outer circumference of the support rod in the longitudinal direction, and the file paper and support rod are fixed to the grip hand. The file is characterized in that it is used by clamping and fixing the file paper between the inner cylinder side of the handle 3 and the large diameter part of the support rod 1 while sequentially shifting the file paper as the file wears. Paper pattern file.