JPH1035192A - Graver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a graver wherein chips do not remain in a hole of a handle and the cost is suppressed low and even when the end part of the handle is scraped, the remains of chips are not generated on the inside of the graver. SOLUTION: A graver 1 is provided with a rod-like handle 4 consisting of a lower side part 2 and an upper side part 3, a triangle graver 5 and a lid piece 6. A triangle channel 2a is formed on the lower side part 2 of the handle 4 and after the triangle graver 5 is fitted into this triangle channel 2a, the upper side part 3 is laminated on this lower side part 2 and they are bonded together to fix this triangle graver 5. A hole 6a with approximately the same crosssection as the crosssection of the triangle graver 5 is formed on the lid piece 6. The triangle graver 5 is inserted into the hole 6a of this lid piece 6 and this lid piece 6 is brought into tight contact with the end face of the handle 4. Even though the triangle channel 2a of the handle 4 forms a hole, this hole is closed by the lid piece 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chisel having a triangular sword or a round sword.

[0002]

2. Description of the Related Art As a conventional chisel, for example, FIG.
There was the one shown in (a). The chisel 21 has a rod-shaped handle 24 composed of a lower part 22 and an upper part 23,
A triangular sword 25 is provided. A triangular groove 22a is formed in the lower portion 22 of the handle 24, and the triangular sword 2 is formed in the triangular groove 22a.
After fitting 5, the lower part 22 and the upper part 23 are bonded together.

A chisel 31 as shown in FIG.
Also, a rod-shaped handle 3 composed of a lower portion 32 and an upper portion 33
4 and a triangular sword 35. In this chisel 31,
A triangular groove 32a is formed in the lower portion 32 of the handle 34, and a triangular ridge 33a is formed in the upper portion 33 of the handle 34, and a triangular sword 35 is fitted into the triangular groove 32a.
The lower part 32 and the upper part 33 are bonded together, and this triangular sword 35 is sandwiched and fixed between the triangular groove 32a and the triangular ridge 33a.

[0004]

However, FIG.
In the case of the chisel 21 shown in FIG.
Since 2a is a hole 22b as shown in FIG. 2B, there is a drawback that shavings 26 easily accumulate in this hole 22b. In particular, if the shavings become long during engraving and the shavings enter the hole 22b of the handle 24 without being cut off during the engraving, the engraving cannot be advanced promptly.

On the other hand, in the case of the chisel 31 shown in FIG. 5A, a portion corresponding to the hole 22b in FIG. 4B is closed by the triangular ridge 33a of the upper portion 33, so that shavings accumulate. However, unlike the triangular groove 32a of the lower portion 32, the triangular ridge 33a is formed by shaving, so that there is a problem that the manufacturing cost is increased.

When the cutting edge of the triangular sword 35 becomes dull, the cutting edge is sharpened. When this is repeated, the portion of the triangular sword 35 exposed from the tip of the handle 34 becomes shorter. Therefore, the tip of the handle 34 must be shaved to make the exposed portion of the triangular sword 35 longer. However, at the part inside the triangular sword 35,
The handle 34 is extremely difficult to cut, and as a result, as shown in FIG.

[0007] Such an uncut portion does not occur in the chisel 21 shown in FIG. This is a triangular groove 22
This is because the inside of “a” is open as a hole 22b.

Accordingly, an object of the present invention is to prevent shavings from accumulating in holes in a handle, to keep costs low, and to prevent shaving from being left behind inside the sword even when the tip of the handle is shaved. To provide chisel.

[0009]

According to a first aspect of the present invention, a triangular hole is formed in an end surface of a rod-shaped handle.
In this chisel, a triangular sword is inserted into the triangular hole and fixed, and a plate-like lid piece having a hole having a shape substantially the same as the cross-sectional shape of the triangular sword is provided. The triangular sword is inserted through the hole of the lid piece. The end of the handle is covered with this lid piece.

In a second aspect of the present invention, a chisel in which a semicircular hole is formed in an end surface of a rod-shaped handle and a circular sword is inserted into the semicircular hole and fixed is substantially the same as the cross-sectional shape of the circular sword. The cover is provided with a plate-shaped cover piece having a hole formed therein. A round sword is inserted through the hole of the cover piece, and the end face of the handle is covered with the cover piece.

In any of the inventions, since the end face of the handle is covered with the lid piece, shavings do not enter the holes on the end face of the handle. In addition, since a triangular or semicircular hole is formed in the end face of the handle, manufacturing is simple, and the cost can be reduced. In addition, if you remove the lid piece, you can cut the tip of the handle, and a triangular or semi-circular hole is opened in the end face of this handle, so even if you cut the tip of this handle, there will be no residue left inside the sword. Does not occur.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the chisel of the first invention. The chisel 1 includes a rod-shaped handle 4 composed of a lower part 2 and an upper part 3, a triangular sword 5, and a lid piece 6. A triangular groove 2a is formed in the lower part 2 of the handle 4, a triangular sword 5 is fitted in the triangular groove 2a, and then the upper part 3 is overlaid on the lower part 2 and adhered, and the triangular sword 5 is fixed. doing.

The cover piece 6 has a hole 6a having substantially the same shape as the cross section of the triangular sword 5. The triangular sword 5 is inserted through the hole 6a of the lid piece 6, and the lid piece 6 is inserted into the handle 4 as shown in FIG.
Close to the end face.

In such a chisel 1, although the triangular groove 2a of the handle 4 becomes a hole 2b as apparent from FIG. 2, the hole 2b is closed by the lid piece 6, so that the hole 2b is cut into the hole 2b. No debris enters. Further, since the hole 2b is formed in the end face of the handle 4, the manufacturing is simple and the cost can be reduced. Furthermore, when shaving the tip of the handle 4, it is sufficient to remove the lid piece 6 once and then sharpen the tip of the handle 4, so that there is no uncut portion inside the triangular sword 5. After shaving the tip of the handle 4, the lid 6
The triangular sword 5 is inserted into the hole 6 a of the handle 4, and the lid 6 is brought into close contact with the end face of the handle 4.

FIG. 3 shows an embodiment of the chisel of the second invention. The chisel 11 has a round sword 12 and, like the chisel 1 of FIG.
A semi-circular groove is formed in the groove, and a round sword 12 is fitted into the semi-circular groove, and then the lower portion 14 is overlaid with the upper portion 15 and bonded.

A hole 16a having substantially the same cross-sectional shape as the round sword 12 is formed in the cover piece 16 and the hole 16a of the cover piece 16 is formed.
The cover blade 16 is brought into close contact with the end face of the handle 13 by inserting the round sword 12 through a.

The chisel 11 also has a hole 1 in the end face of the handle 13.
No shavings enter the 3a, the manufacturing is simple, the cost can be kept low, and even if the tip of the handle 13 is shaved, no shaving remains inside the round sword 12.

[0019]

As described above, according to the chisel of the present invention, since the end face of the handle is covered by the lid piece, no shavings enter the hole of the end face of the handle, and the handle has an edge. Since the hole is formed, the manufacturing is simple, the cost can be reduced, and even if the tip of the handle is shaved, there is no need to leave uncut portions inside the sword.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a chisel according to the first invention.

FIG. 2 is a sectional view showing the chisel of FIG. 1;

FIG. 3 is a perspective view showing an embodiment of the chisel of the second invention.

FIG. 4A is an exploded perspective view showing an example of a conventional chisel, and FIG. 4B is a sectional view showing the chisel.

FIG. 5A is an exploded perspective view showing another example of the conventional chisel, and FIG. 5B is a sectional view showing the chisel.

[Explanation of symbols]

 1,11 chisel 2,14 lower part 3,15 upper part 4,13 handle 5 triangular sword 6,16 lid piece 12 round sword

Claims (2)

[Claims] 1. A chisel in which a triangular hole is formed in an end face of a rod-shaped handle, and a triangular sword is inserted into the triangular hole and fixed, wherein a plate having a hole having substantially the same cross-sectional shape as the triangular sword is formed. An engraving sword that has a lid piece and a triangular sword is inserted through the hole of this lid piece, and the end face of the handle is covered with this lid piece. 2. A chisel in which a semicircular hole is formed in an end surface of a rod-shaped handle, and a circular sword is inserted into the semicircular hole and fixed, and a hole having substantially the same shape as the cross-sectional shape of the circular sword is formed. A chisel equipped with a plate-like lid piece, a circular sword is inserted through the hole of the lid piece, and the end face of the handle is covered with the lid piece.