JPH0357444Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to a mechanism for preventing wood chips from scattering on a tabletop circular saw, and in particular, a mechanism for sending out wood chips generated by cutting a material to the rear side of the main body of the tabletop circular saw. At this time, the intention is to do this without bringing the piece of wood into contact with the cutting edge of the rotating circular saw.

[Background of the idea]

The prior art will be explained using FIGS. 5 and 6.

FIG. 5 is a side view of the tabletop circle, and FIG. 6 is a cross-sectional plan view (partially omitted) taken along the line - in FIG. 5.

As shown in FIG. 6, a round table 2 is fitted approximately in the center of the base 1. The round table 2 has a hinge 3 integrally fixed to its lower part,
By rotating this hinge 3 in the horizontal direction (arrow A or B in FIG. 6), they rotate together.

The rotation and positioning of the round table 2 is performed using the hinge 3.
This is done by a handle 4 screwed onto the front end. When the handle 4 is turned to the tightening side, the tip of the handle 4 hits the arcuate portion 1a of the base 1 and is positioned, and conversely, by turning the handle 4 to the loosening side. , the abutment between the tip of the handle 4 and the arc portion 1a is released, and the round table 2 is in a state where it can be rotated.

Reference numeral 5 designates a blade plate provided on the round table 2 to prevent the occurrence of a fuzzy finished surface at the cut end of the material to be cut. It has a slit 5a that corresponds to the size, and is made of plastic or the like.

Also, on both sides of the top of the round table 2, there is a base 1.
One end side of each fence 6 fixed to the upper surface is located. Here, the distance between the left and right fences 6, 6 is set so that the circular saw 9 and the fence 6 do not interfere with each other when the round table 2 is rotated to the limit position in the direction of arrow A or B in FIG. It is provided.

On the other hand, a saw device 7 is pivotally supported at the rear end of the hinge 3 via a fulcrum 8 so as to be able to swing up and down. is disconnected.

In the tabletop circular saw with the above configuration, if a piece of wood with a dimension less than l is produced, this piece of wood is brought to the rear of the main body by contact with the rotating surface of the circular saw 9, and then sent out to the rear of the main body. As the saw progresses, the piece of wood moves from the rotating surface of the circular saw 9 toward the cutting edge, and as a result, the cutting edge of the circular saw 9 catches the piece of wood, scattering the piece of wood, and scattering it toward the operator. There were problems such as damage to the tabletop circular saw itself.

In addition, this type of tabletop circular saw was developed in 1983 to prevent wood chips from scattering during cutting operations.
-There is No. 7802. This document discloses that a protrusion member having an inclined surface is provided at the rear of the circular saw, and the wood chips are ejected and guided in a direction away from the circular saw, thereby preventing the wood chips from flying away.

However, if the rotation of the circular saw runs out or the piece of wood is not moved away from the circular saw and hits the surface opposite the cutting edge at the rear lower part of the circular saw, the cutting edge may Since the blade is exposed, there is a possibility that wood chips may get caught in the cutting edge and scatter. That is, in the above-mentioned configuration, there is a possibility that the piece of wood and the cutting edge come into contact with each other, and there are elements that are incomplete in terms of preventing the pieces of wood from scattering, so there is still a problem in terms of safety because there is no certainty.

[Purpose of invention]

The present invention completely eliminates the conventional drawbacks and problems, reliably prevents wood chips from scattering in a tabletop circular saw, and improves safety.

[Summary of the idea]

A piece of wood is placed at the rear end of the blade plate inserted into the round table to guide the piece of wood away from the rotating surface of the circular saw as it is sent out toward the rear of the main body by the rotating surface of the circular saw. By arranging a projecting member with a slit formed on the inclined surface of the circular saw and a slit into which the cutting edge part at the rear lower part of the circular saw is inserted when the circular saw is lowered, a piece of wood can be placed against the cutting edge part.
This was devised by focusing on the fact that it can be discharged without contact.

[Example of idea]

An embodiment of the present invention will be described using FIGS. 1 to 4. Fig. 1 is a side view of a tabletop circular saw equipped with a mechanism to prevent wood chips from scattering according to the present invention, Fig. 2 is a cross-sectional plan view taken along the - line in Fig. 1 (partially omitted), and Fig. 3 is a cutter plate and protrusions. Fig. 4 is a perspective view showing the structure of the parts, and shows the steps of cutting work using the tabletop circular saw of the present invention. A partial plan view is shown.

A description of the overall configuration of the tabletop circular saw will be omitted by assigning the same reference numerals to the same members as in the prior art.

In the present invention, as shown in FIG. 3, a specially shaped protruding member 10 having a slit 10a and an inclined surface 10b is arranged at the rear end of the cutting edge plate 5.

The cutting operation of the tabletop circular saw equipped with the protruding member 10 will be described with reference to FIG. 4.

(a) Initial state Cutting location of cutting material W and slit 5 of cutting edge plate 5
a (the passing position of the circular saw 9) and the cut material W is positioned on the circular table 2.

(b) Start cutting The circular saw 9 is lowered to cut into the cutting material W.

(c) Cutting The cutting material W is cut to produce pieces of wood P. At this time, the cutting edge portion at the rear lower part of the circular saw 9 enters into the slit 10a of the projection member 10, so that the cutting edge portion is guarded.

(d) Movement of a piece of wood As the piece of wood P is sent out toward the rear of the main body by the rotating surface of the circular saw 9, it is linked from the rotating surface of the circular saw to the inclined surface 10b of the protruding member. At this time, due to the process (c) above, the cutting edge of the circular saw is not exposed on the passage path of the piece of wood P, so the piece of wood P is smoothly sent out to the rear side of the main body without being caught in the circular saw 9. It turns out.

(E) Completed sending out the wood piece P. Also, the cut piece of wood P is not moved away from the rotational runout of the circular saw 9 or the rotational surface of the circular saw 9, and the cut piece P is connected to the lower rear cutting edge of the circular saw 9. Even if a situation arises in which the blade hits the opposing surface 10c, the piece of wood P and the blade edge do not come into contact because the blade edge portion is inserted into the slit 10a of the protruding member 10. Therefore, scattering of wood chips can be reliably prevented.

[Effect of idea]

According to the present invention, as the piece of wood is sent out to the rear side of the main body by the rotating surface of the circular saw, the piece of wood is guided in the direction away from the rotating surface of the circular saw at the rear part of the slit formed in the round table. Since the projecting member has a sloped surface for cutting and a slit for the rear lower cutting edge of the circular saw to fit into when the circular saw is lowered, contact between the piece of wood and the cutting edge can be completely prevented. By reliably preventing wood chips from scattering, safety during cutting operations can be improved.

[Brief explanation of the drawing]

Fig. 1 is a side view of a tabletop circular saw equipped with the wood chip scattering prevention mechanism of the present invention, Fig. 2 is a cross-sectional plan view taken along the - line in Fig. 1, and Fig. 3 is a perspective view showing the configuration of the cutting edge plate and protruding member. Figure 4 is a cutting process diagram using the tabletop circular saw of the present invention, Figure 5 is a side view of the tabletop circular saw according to the prior art, and Figure 6 is a cross-sectional plan view taken along the - line in Figure 5. . In the figure, 5 is a cutting edge plate, 9 is a circular saw, and 10 is a protruding member.

Claims (1)

[Scope of claims for utility model registration] A base, a round table placed on the base,
It has fences located on both sides of the upper part of the round table and fixed to the upper surface of the base, and cuts the material placed on the round table by lowering the circular saw placed above the round table. When the circular saw is lowered, the table-top circular saw penetrates under the surface of the round table through a slit formed in the round table, and the tabletop circular saw has a slit located on an extension line of the slit at the rear of the slit. and a slit into which the cutting edge part is inserted at the rear lower part of the circular saw when the circular saw is lowered, and a slit for inserting the cutting edge part in the lower rear part of the circular saw, and a slit for inserting the cutting edge part at the lower rear of the circular saw. A mechanism for preventing scattering of wood pieces of a tabletop circular saw, characterized in that a protruding member is provided with a sloped surface for guiding the pieces of wood in a direction away from the rotating surface of the circular saw.