JPS6236841B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the handle of a saw.

When cutting wood or plywood with a saw,
Normally, the cut points are marked in advance before work is carried out, but in such cases, the ground powder produced during the cutting process inevitably accumulates on the marked points, causing the ink to deteriorate. Of course, under such conditions, it is impossible to perform accurate cutting work because the attachment point becomes unclear, and the operator must always take actions such as blowing on the cut point. Therefore, it becomes necessary to remove the flour.

However, if the act of repeatedly blowing on the accumulated ground powder causes it to scatter, the ground powder will accumulate around the worker's face, causing the worker to constantly inhale it. As a result, the health of the workers will be affected. In particular, recently, many new building materials that use gypsum and cement as materials have appeared, and the powder produced during construction on these materials is in the form of fine particles. In such cases, harmful fine particles of dust will accumulate around the worker's face all at once, and if the worker is engaged in such work for a long time, This causes occupational diseases such as pneumoconiosis.

The present invention attempts to eliminate the above-mentioned inconvenience by incorporating means into the handle of the saw for gradually dispersing ground powder and preventing its accumulation.

The structure of the handle of the saw according to the present invention will be explained based on the drawings.As shown in FIGS. 1 to 3, the handle body has a hollow part 2 formed in the handle 1 of the saw,
A movable element 3 is built into the hollow part 2, and an air outlet 4 is formed from the hollow part in the direction of the saw blade.

That is, as shown in FIG. 1, the saw body is a replaceable blade type consisting of a handle 1 of a saw blade 5 to which the saw blade 5 is attached.
As shown in FIG. 2, the saw blade mounting bracket 6 has a hollow part 2 at the center of the shaft that extends in the axial direction. It has a configuration in which air blow-off ports 4 are formed obliquely toward the front.
Therefore, the air in the hollow portion 2 is discharged toward the saw blade 5 through the air outlet 4. Further, the hollow part 2 in the handle part 1 of the saw is formed by hollowing from the rear part of the handle, and therefore, in the rear part,
It has an opening, and a slider 3, which will be described below, is inserted through the opening, and after being inserted, it is closed with a lid 7. Note that the lid body 7 is configured to have a through hole 8 formed therein for introducing air into the hollow portion 2.

As shown in FIG. 2, the mover 3 can freely move within the hollow part 2 formed in the handle part 1, and
A shape capable of moving air within the hollow part 2, that is,
It is formed into a spherical shape corresponding to the cross-sectional shape of the inner wall surface of the hollow part 2, and insertion into the hollow part 2 is as follows:
This is done through the rear opening of the handle 1.

Note that the shape of the slider 3 built in the hollow part 2 of the handle part 1 does not necessarily have to be spherical as described above, and as shown in FIG. It can be configured with a block body 3a having a cross-section of a shape corresponding to the cross-sectional shape, and it is also possible to have a configuration in which shock-absorbing pieces 9 are attached to both ends of the block body 3a. Any structure is sufficient as long as it can move freely within the hollow part 2 and move the air within the hollow part 2 using the reciprocating motion of the handle 1 as a driving force during cutting.

Furthermore, in the above description, when forming the air outlet 4, a communication hole is formed from the front lower part of the handle part 1 toward the hollow part 2, but as another example, as shown in FIG. It is also possible to arrange a tubular body with one end facing toward the saw blade and the other end communicating with the inside of the hollow portion 2 .

The structure of the saw handle 1 according to the present invention is as described above, and the following effects can be expected.

In other words, when cutting with a saw, the handle 1 of the saw naturally repeats reciprocating motion in the front and back direction, but along with this, the internal space inside the hollow part 2 of the handle 1 The mover 3 that is being moved is
It will be moved in the opposite direction to the moving direction of the handle 1, and since the air in the hollow part 2 is divided into front and rear parts with the mover 3 as a boundary, the mover 3, the air inside the hollow part 3 is released from the air outlet 4 or the lid body 7.
It will be discharged from the through hole 8 formed in the. That is, when moving the slider 3 in the forward direction, the air in the hollow portion 2 is discharged to the outside through the air outlet 4, and the air outlet 4 is connected to the saw blade. 5
As a result, it is possible to prevent the accumulation of ground powder in the marked areas due to the wind pressure generated when discharging it, and it is possible to prevent the accumulation of ground powder in This eliminates the inconvenience of having to blow on particles to disperse them.

Furthermore, when working with a conventional saw, when the ground powder is accumulated to such an extent that it becomes unclear where to mark on the work surface, if the ground powder is blown away, the entire area around the worker's face will be covered. When working with a saw using the handle according to the present invention, the worker's health is affected by inhaling the dust. In other words, blowing away the ground powder eliminates the need for dusting, which helps maintain the health of workers. In particular, when cutting new building materials such as plaster or cement, which generate fine particulate dust,
The effects brought about by this will be particularly large.

[Brief explanation of the drawing]

The accompanying drawings show one embodiment of the present invention, in which FIG. 1 is a side view showing the entire saw, FIG. 2 is a partially cutaway sectional view of FIG. 1, FIG. FIG. 4 is a partially cutaway sectional view showing another embodiment. 1... Handle, 2... Hollow part, 3... Mover,
4...Air blowout hole.

Claims (1)

[Claims] 1 A hollow part 2 is formed in the handle part 1, and the hollow part 2 is formed in the hollow part 2 as the handle part 1 moves.
A mover 3 that can freely move inside is built in, and an air outlet 4 is formed from the front part of the hollow part 2 with its tip facing toward the saw blade. The structure of the handle of the saw is characterized in that an air passage hole 8 is formed in the part.