JPH085767Y2 - Portable electric circular saw cutting mechanism - Google Patents

Description

[Detailed Description of the Invention] [Field of Use of the Invention] The present invention relates to a portable electric circle that is cut by a rotating saw blade,
The present invention relates to a cutting adjustment mechanism.

[Background of the invention]

A portable electric circular saw according to the prior art will be described with reference to FIGS. 2 to 6.

As shown in FIG. 2, in the portable electric circular saw,
Generally, the base 1 is made movable, and the cut amount is generally adjusted by the protrusion amount a of the saw blade 9 protruding downward from the bottom surface of the base 1. At that time, as shown in FIG. 3, a guide groove is provided so that the base 1 can be fixed with an appropriate predetermined cut amount.
A link 4 with 10 is provided.

FIG. 5 is a partial cross-sectional view seen from the direction I in FIG. The bolt 6 penetrates the guide groove 10 of the link 4 and the hole 12 of the gear cover 3, and a clamp lever 2 including a nut 5 is attached to the end of the bolt 6.

FIG. 4 shows that the base 1 moves when the clamp lever 2 is at the position C, and the base 1 is fixed when the clamp lever 2 moves to the position d.

Also, the clamp lever 2 is operated by hand, so the base 1
Sufficient clearance is required between and. As shown in FIG. 4, when the bolt 6 is at the bottom of the guide groove 10 and the nut 5 is fixed by the clamp lever 2, the saw blade protrusion amount a
Is the maximum. When the saw blade protrusion amount a is maximum,
In order to obtain the sufficient clearance 1 shown in FIG. 4, the clamp lever 2 is attached while ensuring a ° as shown.

In the prior art as described above, when the cutting depth is adjusted many times, the nut corner portion 14 shown in FIG. 6 is worn, the nut chamber of the clamp lever 2 is deformed, and the nut 5 And the clamp lever 2 will not work together, and the amount of play will increase. If the clamp lever 2 is tightened with the clamp lever 2 at the maximum depth of cut, the clamp lever 2 may come to the position of point e in FIG. The clamp lever 2 cannot be hooked with a finger, which makes it difficult to loosen the nut 5.

[Purpose of device]

It is an object of the present invention to provide this cutting adjustment mechanism for an electric circle that overcomes the above-mentioned drawbacks of the prior art.

[Outline of device]

The present invention focuses on the fact that the clamp lever can be stopped before it comes into contact with the base, and has devised the arrangement and shape of the bosses so that when the clamp lever hits, there is a space for a finger to hang. .

[Example of device]

An embodiment according to the present invention is shown in FIG. In FIG. 1, it is the same as a conventional portable electric circle except that a boss 8 is provided on the base 1.

As shown in FIG. 1, a boss 8 is projectingly provided on the base 1 so that the clamp lever 2 does not rotate further in the A direction. Therefore, even if the depth of cut is adjusted many times and the bolt 6 and the corner portion 14 of the nut are worn or the nut chamber of the clamp lever 2 is deformed and the play becomes large, the clamp lever 2 contacts the base 1. Since it becomes possible to prevent the finger from hanging on the clamp lever 2, it is possible to improve the operability of the clamp lever 2 when adjusting the cutting depth.

[Effect of device]

According to the present invention, in a portable electric circular saw having a clamp lever, by providing a boss on the base,
Even when the bolt is worn or the nut chamber of the clamp lever is deformed, when fixing the base at the maximum depth of cut, the clamp lever is restrained by the boss head, so the clamp lever comes into contact with the base and fingers cannot be hooked. This hinders the operation and improves the operability of the clamp lever.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the cut adjustment portion of the portable electric circle of the present invention, FIG. 2 is a perspective view of the portable electric circle, and FIG. 3 is a cut adjustment operation of the portable electric circle. FIG. 4 is a side view showing an example of the notch adjusting portion of a conventional portable electric circle, FIG. 5 is a partial sectional view seen from the direction I in FIG. 4, and FIG. 6 is FIG. FIG. 11 is a sectional view taken along line JJ of FIG. 1 is a base, 2 is a clamp lever, 3 is a gear cover, 4
Is a link, 5 is a nut, 6 is a bolt, 7 is a co-screw, 8 is a boss, 9 is a saw blade, 10 is a guide groove, 11 is a washer, 12 is a hole, 13 is a bolt head, 14 is a nut corner. , A is the amount of saw blade protrusion.

Claims (1)

[Scope of utility model registration request] 1. A saw blade driven by a motor, a gear cover for covering the saw blade, and a guide for the saw blade when cutting,
In order to adjust the cutting amount by the saw blade, a base movably attached to the gear cover, a link attached to the base and having a guide groove corresponding to the cutting amount adjustment range, and the link are An electric circular saw equipped with a clamp lever which is fixed to a gear cover and which fixes a base with a predetermined cut amount, and a boss projecting from a position facing the clamp lever of the base. A cut adjustment mechanism for a portable electric circle.