JPH0612890Y2 - Contact prevention device for circular saw - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Use of the Invention] The present invention relates to a contact preventive device for a circular saw machine, which prevents a worker's finger or hand from touching the circular saw.

[Background of the Invention] FIGS. 3 and 4 show a conventional contact prevention device for a circular saw machine.
Reference numeral 1 denotes a circular saw machine on which a part of the circular saw 3 is exposed on a surface plate 2 for placing and transferring the material 12, and the material 12 is cut by the circular saw 3. The circular saw 3 is configured to be rotationally driven by an electric motor (not shown) provided on the lower surface of the surface plate 2. Reference numeral 5 denotes a contact prevention device that covers the circular saw 3 in order to prevent the operator's finger or hand from touching the circular saw 3, and is composed of a cover 4 and two left and right auxiliary covers 10.

Reference numeral 8 denotes a rear end of the surface plate 2, that is, a thin plate-shaped split blade that is erected on the delivery side of the material 12, and the material 1 that has been cut.
It prevents the circular saw 3 from being caught by the load 2 and exerting a load on the rotation of the circular saw 3. The split blade 8 also serves as a mounting member for the cover 4, and the cover 4 is rotatably connected by a bolt 9 and a nut (not shown). The cover 4 is made of a steel plate, and the longitudinal cross section is bent in a substantially inverted U shape, and the side surfaces are formed in a substantially triangular shape.
Most of the portion of the circular saw 3 exposed on the surface plate 2 is covered. The auxiliary cover 10 is for covering a portion of the cover 4 that cannot cover the circular saw 3, and two left and right auxiliary covers 10 are rotatably connected to the outside of the cover 4 by bolts 11 and nuts 13. ing.

The conventional contact prevention device for a circular saw machine having such a structure has two drawbacks. One is as shown in FIG.
That is, the chips 14 are scattered toward the worker by the air flow generated by the rotation of the circular saw 3. In order to match the black line marked on the material 12 with the circular saw 3, the worker often works in a posture of looking down at the cutting portion. For this reason, the flying chips 14 just hit the operator's face and significantly hinder the cutting work. Another drawback is that when the operator's hand or finger 16 touches the cover 4 or the auxiliary cover 10 as shown in FIG. 4, the cover 4 is easily deformed, and as a result, the circular saw 3 is easily contacted.

One method of solving the above problem is to increase the plate thickness of the cover 4 to make it difficult to be deformed.
Becomes extremely heavy, the feeding resistance of the material 12 increases, and a new defect that workability is deteriorated occurs.

[Purpose of device]

The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, provide a simple structure, prevent scattering of effective chips, and provide a safe contact preventive device for a circular saw that is not easily deformed. is there.

[Outline of device]

In the present invention, a reinforcing plate is provided inside the side plate of the cover in order to prevent deformation of the cover, and the shape of this reinforcing plate is devised in order to prevent scattering of chips.

[Example of device]

An embodiment of the present invention will be described with reference to FIGS. 1 and 2.
The basic structure of the circular saw machine as a contact prevention device is the same as that of the conventional circular saw machine contact prevention device described above. The first
In FIGS. 2 and 3, the same parts as those in FIGS. 3 and 4 are designated by the same reference numerals.

The reinforcing plate 7 is made of a steel plate and is bent and formed in a substantially V shape. As can be seen from FIG. 2, its width is substantially the same as the inner dimension of the side plate 15 of the cover 4. The reinforcing plate 7 is, for example, welded to the portion of the circular saw 3 exposed on the surface plate 2 excluding the reverse teeth, that is, the position of the cover 4 above the cutting effective portion 6 of FIG. And the like. As shown in FIG. 1, the mounting direction is such that the tangent line drawn to the outer circumference of the cutting effective portion 6 of the circular saw 3 and the hanging portion of the reinforcing plate 7 are in the same direction. If the diagonal portion of the reinforcing plate 7 is made too long, the operator cannot see the cut portion of the material 12, so the length is set so that the cut portion can be seen.

According to the above-described embodiment, the cutting chips 14 collide with the top plate of the cover 4 due to the air flow generated by the rotation of the circular saw 3 and are decelerated, and then move along the top plate in the cover 4. Since it collides with the reinforcing plate 7 and is further decelerated and falls on the material 12 at this decelerated speed, the dropped chips 14 do not scatter around. Further, since the reinforcing plate 7 has a width approximately the same as the inner dimension of the side plate of the cover 4, the side plate of the cover 4 is unlikely to be deformed inward, and the operator's hand or finger covers or the auxiliary cover 1
Touching 0 will no longer contact the circular saw 3.

[Effect of device]

According to the present invention, since a reinforcing plate for chip scattering prevention that also prevents deformation of the cover is provided inside the cover, the structure is simplified and the scattering of chips is effectively prevented, and a safe contact prevention device for a circular saw machine is provided. Can be provided.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a contact preventive device for a circular saw machine according to the present invention, and FIG. 2 is a front view of the contact preventive device for a circular saw machine shown in FIG. FIG. 3 is a side view showing a conventional contact prevention device for a circular saw machine, and FIG. 4 is a front view of the contact prevention device for a circular saw machine as seen from an operator. In the figure, 1 is a circular saw machine, 2 is a surface plate, 3 is a circular saw, 4 is a cover, 5 is a contact prevention device, 6 is a cutting effective portion of the circular saw 3, 7 is a reinforcing plate, and 15 is a side plate of the cover 4. Is.

Claims (1)

[Scope of utility model registration request] 1. A rotatable cover which is formed in a substantially inverted U shape so as to cover an outer peripheral edge portion of a circular saw exposed on a surface plate and which has a linear top plate which is substantially parallel to the surface plate. In the circular saw machine, a reinforcing plate having a width substantially the same as the inside dimension of the side plate of the cover is provided at a position above the effective cutting portion of the circular saw of the top plate of the cover and substantially parallel to the tangent line of the outer periphery of the effective cutting part of the circular saw. A contact prevention device for a circular saw, which is attached at an angle so that cutting chips that have fallen on the material to be cut do not scatter around.