JPH0156881B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the strength of a safety cover for an electric circular saw.

For safety reasons, electric circular saws must completely cover the cutting edge of the circular saw blade. The safety cover rotates in accordance with the feed of the workpiece. Also, to prevent rebound, a splitting blade must be attached at a position corresponding to the circular saw blade. In order to fully demonstrate the effect of the splitting blade, the splitting blade is positioned at a slight distance from the cutting edge of the circular saw blade on the side after cutting the workpiece. So that the split blade cannot prevent the complete cover from rotating,
An elongated hole is provided on the outer periphery of the safety cover, and the safety cover is attached to the split blade so as to fit loosely through the elongated hole. If you accidentally drop an electric circular saw with this configuration, the elongated holes on the outer circumference of the safety cover will reduce the strength of the safety cover, resulting in damage to the safety cover and damage to the circular saw blade. The current situation is that it is causing damage.

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, improve the strength of the electric circular saw machine safety cover, and prevent damage to the safety cover and the circular saw blade.

The present invention focuses on the fact that the strength is improved by providing a strength member, and is devised to make the strength member movable so as not to prevent the positional relationship between the safety cover and the split blade.

An embodiment of the present invention will be described with reference to the drawings.

Fig. 1 shows an electric circular saw machine 1 showing an embodiment of the present invention.
shows a front view. Figure 2 is a front view of the area around the safety cover 2 excluding the circular saw blade 3, and Figures 3 and 4 are
The figure is a sectional view taken along the line A-A' in FIG. 2. The configuration will be explained.

The circular saw blade 3 is covered with a frame 4 and a safety cover 2, and the frame 4 is fastened to a base 5. The safety cover 2 rotates around the rotating shaft of the circular saw blade 3,
Usually, the spring 6 is positioned so as to cover the circular saw blade 3 protruding from the base 5 surface.

An arm 7 is mounted on the rotating shaft, and a splitting blade 9 is mounted on the arm 7 with a bolt 8. A long hole 9a is provided in the splitting blade 9 so that the gap between the circular saw blade 3 and the splitting blade 9 can be adjusted. Further, in order to adjust the gap between the circular saw blade 3 and the splitting blade 9 by a minute distance, the splitting blade 9 is inserted inside the safety cover 2. Therefore, safety cover 2
A long hole 2a is provided in the hole 2a, and the split blade 9 is inserted into the long hole 2a.
It passes through with a loose fit. The elongated hole 2a of the safety cover 2 is provided from point B to point C of the safety cover 2 so that even if the safety cover 2 rotates, it will not contact the splitter blade 9 and prevent its movement.

A reinforcing member 10 having a shape that wraps around the safety cover 2 is provided near the center of the elongated hole 2a of the safety cover 2. The reinforcing member 10 has elongated holes 2 in the safety cover 2.
Insert the pin 11 inserted into the reinforcing member 1.
0 and the spring 12 attached to the safety cover, the reinforcing member 10
It maintains a state in which it is in pressure contact with the

Next, the operation of the safety cover 2 and the reinforcing member 10 will be explained.

When a workpiece (not shown) is fed from the right to the left in FIG. 1 along the base 5 surface, the end of the workpiece comes into contact with the end of the safety cover 2, and the workpiece is When fed, the safety cover 2 is pushed by the workpiece and stored into the frame 4. When the safety cover 2 moves toward the frame 4, the reinforcing member 10 also moves toward the frame 4, but since the D portion of the reinforcing member 10 is closed, when it reaches the position of the split blade 9, the reinforcing member 10 is moved by the spring. 12 and rides on the back part 9b of the split blade 9, and the frame 4 moves along the back part 9b.
is stored inside.

As described above, by providing a reinforcing member that operates without any trouble even when the safety cover is rotating, it is possible to prevent the long hole 2a of the safety cover from widening and improve the strength when it falls from the safety cover side. , safety cover, can prevent damage to the circular saw blade.

Furthermore, as shown in FIG. 4, by providing a recess 10a in the portion of the reinforcing member 10 where the splitting blade 9 slides, the positioning of the reinforcing member 10 and the splitting blade 9 when sliding can be performed, ensuring reliable operation. that it can be done,
Additional effects to those of the present invention can be achieved.

According to the present invention, by providing a reinforcing member that allows movement only in the radial direction with respect to the safety cover, the elongated hole of the safety cover expands when the electric circular saw falls, without hindering the operation of the safety cover. It is possible to improve the fall strength of the safety cover and prevent damage to the safety cover and the circular saw blade.

[Brief explanation of drawings]

Fig. 1 is a front view of an electric circular saw machine showing an embodiment of the present invention, Fig. 2 is a front view showing an embodiment of the safety cover and surroundings of the electric circular saw machine of the present invention, Figs.
The figure is a sectional view taken along the line A-A' in FIG. 2. In the figure, 2 is a safety cover, 3 is a circular saw blade, and 4 is a safety cover.
9 is a frame, 9 is a splitting blade, 10 is a reinforcing member, 11 is a pin, and 12 is a spring.

Claims (1)

[Claims] 1. In an electric circular saw machine that has a safety cover that covers the circular saw blade and has an elongated hole on the outer periphery of the safety cover to maintain a loose fit with the splitter blade, the safety cover is An electric circular saw machine characterized in that a reinforcing member that wraps around a cover is provided via a spring.