JP2537068Y2 - Blade plate adjustment mechanism for portable circular saw machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade plate adjusting mechanism for a portable circular saw.

[0002]

2. Description of the Related Art With reference to FIG. 1 and FIGS. 10 to 13, a blade port adjusting mechanism of a conventional portable circular saw will be described. As shown in FIG. 1, the saw blade 1 is driven by an electric motor, a saw cover 2 covers the saw blade 1, a housing 3 containing the electric motor, and a base 4 for guiding the saw blade 1 at the time of cutting. As shown in FIGS. 10 and 11, in a portable circular saw machine, a cutting edge 20 from which the saw blade 1 protrudes is formed in the base 4, and the cutting edge of FIG. A blade plate 7 slidable in the direction of the arrow is embedded. The blade plate 7 is mounted on the bottom of the base 4 by means of countersunk screws 8 and nuts 11, as shown in FIGS. The base 4 has a long guide groove 6 for guiding the flat screw 8.
Are drilled.

[0003]

In the blade plate adjusting mechanism of the portable circular saw having the above structure, when adjusting the position of the blade plate 7, the operation of tightening or loosening the flat screw 8 is performed. The adjustment work is troublesome because it is necessary, and there is a problem that a tool such as a screwdriver is required. SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned problems of the prior art and to improve the operability of adjusting the position of a blade plate of a portable circular saw.

[0004]

The above object is achieved by using a plate spring between the screw and the nut and using a spring to support the blade plate, instead of fixing with a screw and a nut.

[0005]

The blade edge plate adjusting mechanism of the portable circular saw machine configured as described above adjusts the position of the blade edge plate by utilizing the elastic deformation of the leaf spring by supporting the blade edge plate by the leaf spring. Can be easily performed.

[0006]

1 to 9 show an embodiment of the present invention. A saw blade 1 driven by an electric motor, a saw cover 2 covering the saw blade 1, a housing 3 containing the electric motor, a base 4 for guiding the saw blade 1 during cutting, and a saw blade 1 on the base 4.
A protruding blade port 20 is formed, and the structure in which the blade port plate 7 is buried in the vicinity of the blade port 20 so as to be movable in the direction of the arrow in FIG. .

Further, in the present invention, as shown in FIGS. 4 to 9, the blade plate 7 is sandwiched by a flat screw 8 and a knob 5 via a leaf spring 9. As shown in FIGS. 5 and 6, the leaf spring 9 is deformed in the direction of the arrow to have an elastic force. The base 4 is formed with a plurality of guide grooves 6 for guiding the flat screws 8 and a plurality of corrugated grooves 10 for engaging with the E portion of the leaf spring 9 and suppressing the movement of the knob 5. The relationship between the dimension W and the dimension X shown in FIG.
Therefore, when the knob 5 moves, the leaf spring 9 is deformed to generate an elastic force. As shown in FIGS. 6 and 9, since the relationship between the dimension Y and the dimension Z is Z <Y, the leaf spring 9 always generates an elastic force in a direction to push the knob 5 upward. For this reason, the blade plate 7 always comes into contact with the lower surface of the base 4.

With the above configuration, the blade plate 7 is adjusted by applying a force to the knob 5 so that the leaf spring 9 is deformed.
This is enabled by engaging the leaf spring 9 with the corrugated groove 10 at an arbitrary position. In addition, since the blade opening plate 7 is always in contact with the lower surface of the base 4 by the force of the leaf spring 9, it is not necessary to specially tighten or loosen the screw, and without using a tool such as a screwdriver. The blade plate 7 can be adjusted.

[0009]

According to the present invention, the blade plate buried in the base is clamped using a leaf spring, and the elastic deformation of the leaf spring is used to eliminate the work of tightening and loosening the screw. Therefore, the operability of the portable circular saw can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a portable circular saw.

FIG. 2 is a top view of the base of the present invention.

FIG. 3 is a bottom view of the base of the present invention.

FIG. 4 is an exploded perspective view showing a base of the present invention.

FIG. 5 is a top view of the leaf spring of the present invention.

FIG. 6 is a sectional view taken along line DD of FIG. 5;

FIG. 7 is an enlarged view of a portion A in FIG. 2;

FIG. 8 is a sectional view taken along line BB of FIG. 4;

FIG. 9 is a sectional view taken along the line CC of FIG. 4;

FIG. 10 is a top view of a prior art base.

FIG. 11 is a bottom view of a base of the prior art.

FIG. 12 is an exploded perspective view showing a base of the related art.

13 is a sectional view taken along line EE of FIG.

[Explanation of symbols]

1 is a saw blade, 2 is a saw cover, 3 is a housing, 4 is a base, 5 is a knob, 6 is a guide groove, 7 is a blade plate, 8 is a flat screw, 9 is a leaf spring, 10 is a wave groove, 11 is a nut. , 20
Is a blade.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-5001 (JP, A) JP-A 62-55401 (JP, U) JP-A 63-84302 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A and saw blade is driven by an electric motor, attached to the outer frame for accommodating the electric dynamic <br/> machine, rectangle saw blade protrudes
The base with the cutting edge and the one perpendicular to the plane of the saw blade
A portable circular saw having a plate-like blade plate provided near the blade hole on the base bottom surface so as to be movable in the direction of the base, wherein the base extends along the moving direction of the blade plate. Establishment
Screw that penetrates upward through the guide groove and the blade plate, and a knob attached to the upper end of the screw.
Attached to at least one side of the guide groove
It has a part protruding to the side of the knob so as to engage with the groove of
A blade edge plate adjusting mechanism for a portable circular saw machine, comprising: a leaf spring ;