JP2611618B2 - Portable electric circular saw - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable electric circular saw, and more particularly, to an improved guide plate which is pressed against a side surface of a material to be cut to guide the cutting operation.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a portable electric circular saw. As is well known, the electric circular saw includes a circular saw main body 1 having a motor, a reduction gear, and the like (not shown) built therein. The saw blade 2 whose upper half is substantially covered by the above, the base 3 rotatably mounted on the front part of the circular saw main body 1, used for cutting, and the circular saw main body 1 is cut along the side surface of the material 8 to be cut. It is composed of a guide 4 for guiding parallel to the side surface. As is well known, the guide 4 has a guide plate 14 pressed against the side surface of the material 8 to be cut, one end of which is mounted on the guide plate 14 via a screw or the like, and the other end provided on the side and top surfaces of the base 3. The guide bar 15 extends through the hole 3 and extends across the base 3.

As shown in FIG. 5, when a workpiece 8 is cut using a guide 4, the guide 4 is attached to a saw blade 2 on a base 3 by a handle portion 7 gripped by an operator. Since it is located in front, there is a problem that the action of the force becomes unstable and the circular saw main body 1 is swung, and it is not possible to cut with high accuracy. In order to eliminate the above-mentioned problem, the guide plate 14 is extended along the side surface of the base 3 to have substantially the same length as the base 3, and the two guide bars 15 are separated from the guide plate 14 before and after the cutting direction of the saw blade 2. The portable electric circular saw provided was proposed in Japanese Utility Model Application No. 4-42382.

[0004]

However, if the electric circular saw having the above structure is used, the portion of the workpiece 8 before cutting off is cut by the saw blade 2.
When the saw blade 2 is pressed to the side, the saw blade 2 is sandwiched between the workpieces 8 and a phenomenon called kickback occurs, which is dangerous. SUMMARY OF THE INVENTION An object of the present invention is to provide a portable electric circular saw that eliminates the above-mentioned drawbacks of the prior art and enables accurate and stable cutting.

[0005]

The above object is achieved by providing a relief on the guide surface behind the guide plate in the cutting direction so as not to contact the side surface of the material to be cut.

[0006]

By using the guide plate configured as described above, a stable and safe cutting operation can be performed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. The guide plate 14 extending parallel to the base 3 along the side surface of the base 3, as shown in FIG.
A relief 24 is provided behind the guide surface pressed against the side surface of the workpiece 8. The relief 24 is formed by shaving off the guide surface of the guide plate 14 by δ, and its front end is located a distance L ahead of the cutting direction center a of the saw blade 2. One end of the guide plate 1 via the screw 9
The two guide bars 15 mounted on the outer surface of the base 4 extend through the base 3 through holes formed in the side surface of the base 3 and the upper surface (not shown), and are located on both front and rear sides of the saw blade 2 in the cutting direction. It is provided to be.

Since the guide plate 14 is made parallel to the side surface of the base 3 and has substantially the same length as the base 3 and the guide plate 14 is held on the base 3 via two guide bars 15, the guide plate is provided at the time of cutting. Plate 14
Is restricted from moving relative to the base 3 due to deformation or the like. As a result, the circular saw main body 1 is not shaken and can be cut straight. Further, since the relief 24 is provided behind the guide surface of the guide plate 14, the portion of the workpiece 8 before cutting off is not pressed against the saw blade 2 side, and the saw blade 2 is inserted into the workpiece 8 There is no danger of kickback.

[0009]

According to the present invention, the guide plate is supported at two positions in front of and behind the saw blade on the base, and a clearance is provided behind the guide surface of the material to be cut of the guide plate. A portable electric circular saw capable of cutting can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a portable electric circular saw of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a plan view showing an embodiment of the guide plate of the present invention.

FIG. 4 is a perspective view showing an example of a conventional portable electric circular saw.

FIG. 5 is a plan view of FIG. 4;

[Explanation of symbols]

1 is a circular saw body, 2 is a saw blade, 3 is a base, 4 is a guide, 7
Is a handle, 8 is a material to be cut, 14 is a guide plate, 1
5 is a guide bar, and 24 is an escape.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model 57-151701 (JP, U) Japanese Utility Model 50-116191 (JP, U) Japanese Utility Model 398002 (JP, U) Japanese Utility Model 57-151 103801 (JP, U)

Claims (2)

(57) [Claims] 1. A base, a saw blade having a substantially lower half protruding below the base, and a drive source such as a motor for rotatably supporting the saw blade and driving the saw blade. A mounted circular saw body, a guide plate that extends in parallel with the side surface of the base along the cutting direction, has a length substantially the same as the base, and has a guide surface pressed against the side surface of the material to be cut on the base side; Attached to the guide plate,
The other end extends across the base in a direction perpendicular to the cutting direction,
A portable electric circular saw having guide bars provided on both front and rear sides in a cutting direction of the saw blade, wherein a relief not contacting the side surface of the material to be cut is provided on a guide surface behind the guide plate in a cutting direction. A portable electric circular saw. 2. The portable electric circular saw according to claim 1, wherein a front end of the relief is located forward of a center of a cutting direction of the saw blade.