JPH0237531Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a chamfering tool for chamfering soft building materials such as foamed concrete plates, decorative blocks, and Oya stone.

For example, when forming the outer wall of a building using foamed concrete plates, as shown in Fig. 9, the abutting end surface sides of adjacent foamed concrete plates a and b, and the foamed concrete plate c forming the corner of the outer wall.
Chamfering a', b', and c' of the outer wall edges, etc. is carried out.

This chamfering is done not only for aesthetic purposes, but also from the viewpoint that sharp corners are dangerous.

[Problems to be solved by conventional techniques and ideas]

Conventionally, as a single-function tool for chamfering as shown in FIG. 9, there is a tool in which an opening is made at the corner of a right-angled angle member and a blade is exposed to the opening. This tool applies the right-angled side of the angle to the corner of the foam concrete plate and pushes or pulls it along the corner, and the blade cuts off the corner of the foam concrete plate to create a chamfer. It can be carried out.

However, in the case of tools, there is a recess d ₁ recessed inward from the end face of the foamed concrete d as shown in Figure 10a, a convex part d ₂ protruding outward from the end face as shown in b, or a plate surface. It cannot be used to chamfer d' even in the part of the opened opening (not shown), and the chamfer d' in such a part cannot be cut off using a separately prepared chisel or the like. It was done.

In this way, a separate tool must be prepared for chamfering, and the tool must be replaced depending on the location to be chamfered, which leads to problems such as poor work efficiency and difficulty in uniformly chamfering. It was hot.

[Means for solving problems]

In view of the above-mentioned conventional problems, the present invention aims to provide a chamfering tool that can chamfer parts such as recesses, protrusions, and openings in soft building materials with a single tool. The chamfering tool made for this purpose consists of an angle main body with a right angle cross section, an opening is made in the corner of the central part of the angle main body, and the cutting edge facing through the opening is at right angles to each other of the angle main body. The first edge is cut so that the cutting edge forms a predetermined corner with respect to each surface that meets the first edge.
a cutter is detachably attached to the angle body, and one end of the angle body is extended at a predetermined angle with respect to the angle body, and the ends of the extensions are attached at right angles to each other. It is characterized in that the second cutter is detachably attached so as to form a predetermined angle with respect to each of the meeting surfaces.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a perspective view showing an embodiment of the chamfering tool according to the present invention. In the figure, 1 is an angle body made of stainless steel or aluminum and having a right-angled cross section;
As shown in Fig. 2 (partial cross-section), the opening 1a is made by cutting off the corners of the central part at angles of approximately 90° and approximately 30° with respect to the longitudinal direction of the angle member body 1. ing.

The angle material main body 1 has the above-mentioned opening 1a.
A first blade mounting portion 2 having a receiving surface 2a (FIG. 2) along an angle of approximately 30 degrees is integrally formed.
The first cutter mounting portion 2 is provided with a female thread 2b machined at the center of the receiving surface 2a at a right angle to the receiving surface 2a, and a cutter regulating channel 2c formed by raising both sides of the receiving surface 2a. ing.

On the receiving surface 2a of the first cutter attachment part 2, a first cutter 3 whose cutting edge 3a is made of a carbide blade or the like is placed on the surfaces 1b, 1b of the angle material body 1 where the cutting edge 3a meets each other at right angles. The bolts 5 are placed so as to intersect with each of them at an angle of approximately 135° (Fig. 3), and are inserted through the washers 4 into the elongated holes 3b drilled in the center of the first cutter 3. By screwing into the female thread 2b and tightening, the first cutter 3 becomes the first
It is fixed to the receiving surface 2a of the blade attachment part 2.

The long hole 3b of the first cutter 3 is for enabling the position of the cutting edge 3a of the first cutting tool 3 to be moved according to the amount of chamfering, and when moving the cutting edge 3a, the bolt 5, move the cutting edge 3a of the cutter 3 to a predetermined position, and then tighten it.
Firmly fix the cutting edge 3a of the knife 3 so that it does not shift.

In this embodiment, the head of the bolt 5 is provided with a hexagonal hole and a knurl to facilitate the tightening and release of the bolt 5 when moving the cutting edge 3a, but other means may be used. There is no harm in using it.

One end of the angle body 1 (in the direction of the cutting edge 3a of the first cutter 3) is bent and extended at an angle of approximately 30 degrees with respect to the longitudinal direction of the angle body 1, and the tip of the extension portion 11 The corners are cut off at an angle of approximately 15°.

The extension portion 11 has a second receiving surface 12a (FIG. 4) along the approximately 15° cut surface.
A blade mounting portion 12 is integrally formed. The second blade mounting portion 12 has a female thread 12b machined at the center of the receiving surface 12a at a right angle to the receiving surface 12a.
and a cutter regulation channel 12c formed by standing up both sides of the receiving surface 12a.

On the receiving surface 12a of the second knife attachment part 12, a second knife 13 whose cutting edge 13a is made of a carbide blade or the like is mounted on the surfaces 11b, 11b of the extension part 11 where the cutting edge 13a meets each other at right angles. (the fifth
), the bolt 1 inserted through the washer 14 into the long hole 13b drilled in the center of the second cutter 13
5 into the nut 12b and tightening, the second cutter 13 is attached to the second cutter mounting portion 12.
is fixed to the receiving surface 12a of. Note that the washer 14 is not necessarily required.

Similarly to the long hole 3b of the first cutter 3, the long hole 13b of the second cutter 13 has a second cutout according to the amount of chamfering.
This is to enable the position of the cutting edge 13a of the cutter 13 to be moved.The head of the bolt 15 is also provided with a hexagonal hole and knurling in order to facilitate the tightening and release of the bolt 15 at this time. ing.

In addition, in this embodiment, the cutting edge 13 of the second cutting tool 13
When moving the position a, untighten the bolt 15,
To make tightening easier, bolt 15, bolt 15
Although the head has a hexagonal hole and knurling,
Of course, other means may also be used.

The method of using the chamfering tool having the above configuration is performed as shown in FIGS. 6 to 8.

First, if there are no unevenness etc. on the end face of the building material surface 1b, 1b (third
(Fig.) is made to follow _the two orthogonal x ₁ and x ₂ of _the building material
All you have to do is push or pull the tool along the

Next, if there is a recess in the end face of the building material X to be chamfered, chamfering is performed using the second cutter 13 as shown in FIGS. 7 and 8. At this time, first, as shown in FIG. 7, the surfaces 11b and 11b (FIG. 5) of the extension part 11 that meet each other at right angles are made to follow the two orthogonal surfaces x ₃ and x ₄ of the recess of the building material X. hand,
From an appropriate position, push along both sides x ₃ and x ₄ as shown by the arrows in the figure in the direction of the cutting edge 13a of the cutter 13 to make the first chamfer, and then as shown in FIG. For areas that cannot be removed by chamfering, you can press the tool from the opposite direction and chamfer in the same way.

Although not shown in the diagram, opposing parts of the recess
x ₅ and x ₆ can also be chamfered using the cutter 13 in the same way. In addition, in the illustrated embodiment, the cutting edge of the cutter is aligned with each face of the angle body where they meet.
Although the angle is 135°, it is clear that this angle changes depending on the shape of the cutting edge.

Furthermore, depending on the shape of the cutting edge, R (R) chamfering is also possible.

[Effect of idea]

As described above, according to the present invention, in addition to the first cutter provided at the center of the angle material body, the second cutter is provided at the tip of the extension portion bent at a predetermined angle with respect to the angle material body. Because it has a knife of
The second knife can be used to chamfer irregularities or openings in building materials that cannot be chamfered with the first knife. By being able to perform all kinds of chamfering with a single tool in this way, there is no need for multiple tools, and in addition to improving work efficiency, there are many effects such as uniform chamfering.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the chamfering tool according to the present invention, Figs. 2 to 4 are sectional views of each part in Fig. 1, and Fig. 5 shows a part of Fig. 1 from a predetermined angle. 6 to 8 are explanatory diagrams for explaining how to use the tool shown in FIG. 1, FIG. 9 is a perspective view showing an example of how to use chamfered building materials, and FIG. FIG. 2 is a perspective view illustrating the shape of a building material that cannot be chamfered with a single tool conventionally. 1...Angle material body, 1b, 1b...face, 3
...First knife, 3a...Blade edge, 11...Extension portion, 11b, 11b...Face, 13...Second knife, 13a...Blade tip.

Claims (1)

[Scope of utility model registration request] It consists of an angle main body with a right angle in cross section, an opening is made at the corner of the central part of the angle main body, and the cutting edge facing from the opening has a cutting edge on each side of the angle main body that meets each other at right angles to each other. In a chamfering tool in which a first cutter is detachably attached to an angle main body so as to form a predetermined angle, one end of the angle main body is extended at a predetermined angle with respect to the angle main body, and the extension portion A chamfering tool characterized in that a second cutter is detachably attached to the tip of the extension part so as to form a predetermined angle with respect to each surface of the extension part that meets each other at right angles.