JPS5820327Y2 - Circular saw safety device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a safety device for a circular saw.

Conventionally, there has been a stationary circular saw machine with an auxiliary work table attached to it for use as a circular saw machine for removing tenons.

As shown in Figures 1 and 2, this means that a stationary circular saw (this is usually constructed by attaching a portable circular saw (not shown) to a bench stand 1) 2 with its table 3 vertical. An auxiliary work table 4 is attached horizontally to the table 3 which is laid down on its side.

The height of this work table 4 is adjusted according to the height of the wood.

This is to align the height center of the wood with the center 6 of the circular saw blade 5.

Although the height of the work table 4 is adjusted by changing the position of the work table 4 when it is attached to the table 3, a detailed explanation of its configuration will be omitted.

The table 2 is equipped with a contact prevention device 7 that covers the protrusion of the circular saw blade 5 from the work table 4. For safety reasons, the contact prevention device 7 completely covers the circular saw blade 5 protruding from the work table 4. There is a need to smell it.

However, in the conventional type, the work table 4 is configured to be adjusted by moving up and down, so especially when the work table 4 is moved to the lower position, the gap between the work table 4 and the contact prevention device 7 is A gap a is created between the circular saw blades 5 and the circular saw blade 5 is exposed, which is unfavorable from a safety standpoint.

The contact prevention device 7 is composed of a fixed cover 8 and a movable cover 9, and the movable cover 9 is rotatably connected to the fixed cover 8 with a pin.

The movable cover 9 rotates in the direction of arrow A when the wood is pushed in.

In order to eliminate the above-mentioned gap a, it may be possible to increase the length of the movable cover 9, but this increases the weight and deteriorates the operability, and the movable cover 9 hits the table 3 when rotating. Normal rotation is no longer possible, and it is actually difficult to enlarge the movable cover 9 to fill the gap a.

In addition, the contact prevention device 7 is generally made of a steel plate, and therefore, it can be used in the lateral direction (arrow B in FIG. 2).

There was a risk that the contact prevention device 7 would deform and come into contact with the circular saw blade 5 when an external force was applied in the direction C).

The present invention aims to eliminate the above-mentioned drawbacks of the conventional technology, and embodiments of the present invention will be described below with reference to FIGS. 3 to 5.

In FIGS. 3 to 5, an auxiliary cover 10 is attached to the work table 4 and is rotatable by being fitted onto a bolt 11. As shown in FIGS.

As shown in FIG. 4, this auxiliary cover 10 has a U-shaped planar shape and has a mounting bracket 1 fixed to the work table 4.
One end is attached to 2 with pin 11.

The width W1 of the auxiliary cover 10 is configured to be slightly smaller than the inner width W2 of the movable cover 9, and when the auxiliary cover 10 is in the upper position, the gap a between the work table 4 set in the lower position and the movable cover 9 is As the cover is closed, the upper end of the auxiliary cover 10 enters inside the movable cover 9, and the two are in a locked state.

The mounting bracket 12 and the work table 4 each have a hole 13.14 through which the auxiliary cover 10 projects onto the work table 4.

Further, the auxiliary cover 10 includes a spring 1 wound around a bolt 11.
5 to the upper position shown in FIGS. 3 and 4.

In the above configuration, when the wood 16 is pushed in to perform the tenon removal work, the movable cover 9 is rotated upward by the wood 16, and the auxiliary cover 10 is rotated below the work table 4.

This state is shown in FIG.

When the cutting of the wood 16 is finished and the wood 16 is pulled back to the right in FIG.
It is restored to the state shown in FIGS. 3 and 4 by the spring 15, and the circular saw blade 5 is completely covered.

In the state shown in FIGS. 3 and 4, that is, when the wood 16 is not being cut, the upper end of the auxiliary cover 10 is engaged with the lower end of the movable cover 9. Even if an external force is applied, the movement is prevented by the auxiliary cover 10, and the contact prevention device 7 will not come into contact with the circular saw blade 5.

In addition, as shown in FIG. 5, when cutting the wood 16, the auxiliary cover 10 is
lowers to partially place the circular saw blade 5 at the bottom of the work table 10, contributing to improved safety.

By appropriately devising the shape of the auxiliary cover 10, the auxiliary cover 1
Circular saw blade 5 exposed at the bottom of work table 10 by 0
It is also possible to almost completely cover the area, which of course further improves safety.

Since the present invention has the above-mentioned configuration, it is possible to eliminate the gap that occurs between the contact prevention device and the work table when the work table is set at the lower position, improving safety. Even if an external force is applied, deformation can be prevented and contact with the circular saw blade can be prevented.

Furthermore, by suitably devising the shape of the auxiliary cover, it is possible to cover the circular saw blade exposed at the bottom of the work table, resulting in effects such as being able to further improve safety.

In this embodiment, a circular saw for removing tenons has been described, but the present invention is not limited to this, and it is clear that it can also be applied to a stationary circular saw.

[Brief explanation of drawings]

FIGS. 1 and 2 are side and front views showing a conventional circular saw for mortising. FIG. 3 is a side view showing an embodiment of the present invention in a circular saw for mortising, and FIGS. 4 and 5 are an enlarged front view and an enlarged side view of the main parts of the invention. 5 is a circular saw blade, 7 is a contact prevention device, 9 is a movable cover, 1
0 is an auxiliary cover, and 15 is a spring.

Claims (1)

[Scope of utility model registration request] A contact prevention device is provided to cover a circular saw blade protruding above the working table, and the working table is height-adjustable. It covers the circular saw blade exposed in the space between the work table and the movable cover of the contact prevention device that occurs when the movable cover of the contact prevention device is set at the position, and engages with the lower end of the movable cover of the contact prevention device to prevent lateral vibration of the movable cover. A rotatable auxiliary cover is provided below the work table to prevent the work from occurring, and the auxiliary cover is associated with a spring that sets the cover to an upper position where it covers the circular saw blade and engages with the movable cover. Features safety equipment.