JP2002254242A - Cutting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a cutting operation in a cutting tool travelling to the thrust direction and performing the cutting operation while giving cutting thrust along the cutting side of an object to be cut. SOLUTION: In the cutting tool travelling to the thrust direction and performing the cutting operation, a spike 14 guided by a spring 16 from the vertical direction at an angle of 30 degrees to the thrust direction is installed in the forward bottom of a body 6 to be always energized to the direction of the object to be cut. Moreover the composition of the tool is that the cutting thrust is given while the cutting tool is oscillated using the tip of the spike as a bearing to cut the object to be cut by reducing the contact area of the tip of a chain saw.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable power cutting tool which moves in the direction of a thrust while giving a cutting thrust to cut.

[0002]

2. Description of the Related Art A conventional portable power cutting tool is designed to rotate the cutting tool blade in the direction of rotation (when viewed from the right side of the cutting tool in front of the cutting tool) when cutting along the surface of the object to be cut. Counterclockwise) to receive a force that is pulled in a direction perpendicular to the thrust direction. Therefore, at the time of cutting, a force that suppresses the pulling force in the opposite direction to the pulling force simultaneously with the thrust direction is required.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cutting tool with a cutting thrust in an intermediate direction between a thrust direction and a direction perpendicular to the thrust direction, and a contact of a blade for cutting an object to be cut. A portable power-type cutting tool that can apply cutting thrust while oscillating the cutting tool to reduce resistance, and further urges the cutting tool toward the workpiece by using an elastic body. Work improvement.

[0004]

According to a first aspect of the present invention, there is provided a cutting tool which moves and cuts in the thrust direction while applying a cutting thrust along a surface to be cut of an object to be cut. A spike that is movable in a direction intermediate to a direction perpendicular to the cutting tool is attached to the body of the cutting tool, and the tip of the spike on the object side is sharpened so that it can easily bite into the object.

[0005] A second aspect of the present invention is characterized in that, in the first aspect of the present invention, there is provided an urging means for constantly urging the spike in the direction of the object to be cut.

According to a third aspect of the present invention, there is provided a tool for cutting concrete or stone using a long blade, such as a chain saw, according to the first or second aspect, wherein the tool is 10 ° to 40 ° from a direction perpendicular to the thrust direction. A spike that can move in a direction between degrees is attached.

According to a fourth aspect of the present invention, there is provided a cutting tool using a long blade, such as a chain saw or a saver saw, according to the first or second aspect, in order to cut an object to be cut by reducing the contact area of the blade. The cutting thrust is applied while oscillating the cutting tool with the tip of the spike on the cut object side as a fulcrum.

According to the first and second aspects of the present invention, the spike is attached to the cutting tool in a direction intermediate between the thrust direction and the direction perpendicular to the thrust direction, and a spring or rubber for guiding the spike is urged. By making it possible to move in the axial direction of the spike using the means, the thrust and the cutting direction become closer, and the force for suppressing the pulling force generated by the rotating direction of the blade of the cutting tool can be reduced.

The cutting tool is always urged in the direction of the object to be cut by sharpening the tip of the spike on the side of the object to be cut and making it easy to bite into the object to be cut.

According to the third and fourth aspects of the present invention, in the case of a cutting tool using a long blade, such as a chain saw or a saver saw, a point cut into an object to be cut is used as a fulcrum of the cutting tool, and the cutting tool is moved in a lever-like manner. You can cut while.

With the above structure, the object to be cut can be easily cut, and the workability can be improved.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing one embodiment of a cutting tool according to the present invention. In the present embodiment, an engine is used as a power source, a flexible pipe section 9 for transmitting rotational power is connected, and a chain saw section for cutting stone and concrete is configured.

The chain saw section 1 is made by dispersing diamond grains in an alloy metal, and is made of a chain 3 in which a chip 2 for cutting stone and concrete is welded in contact with stone or concrete, and a guide bar 4 for guiding the running of the chain 3. , A sprocket (not shown) for driving the chain 3, and a body 6 and the like. The body 6 is provided with a front handle 7 and a rear handle 8 for holding a flexible tube mounting portion 5, a sprocket (not shown), a chain 3, and a guide bar 4, and for applying a cutting thrust of stone or concrete. I have. With the above configuration, the chain saw unit 1 is coupled with the engine as the power source, and the engine rotational power is transmitted to the centrifugal clutch (not shown), the sprocket (not shown), and the chain 3, and the chip 2 comes into contact with stone and concrete. When the thrust is given by the front handle 7 and the rear handle 8, stones and concrete can be cut.

FIG. 2 is an enlarged side view around a spike, which is a part of the chainsaw portion of FIG. 1, and FIG. 3 is an enlarged cross-sectional side view around a spike, which is a part of the chainsaw portion of FIG.

A recess 12 is provided in the body 6, and a spike 14 is sandwiched between a spring 16, a washer 17 and a bolt 18 housed between a right end face 13 of the body recess and a bent portion 15 of the spike 14, and the spike 14 is It is configured to be guided by the spring 16 and move in the axial direction of the spring 16. The spike 14 is attached to the body 6 at an angle of 30 ° from a direction perpendicular to the thrust direction, and the tip 19 of the spike has a sharp shape to make it easy to bite into stone or concrete.

FIG. 4 is a perspective view showing the cutting tool of this embodiment when cutting stone or concrete, FIG. 5 is an enlarged side view showing the vicinity of the spike in FIG. 4, and FIG. 6 is the vicinity of the spike in FIG. FIG.

The spike 14 is made of stone or concrete 21.
When a thrust is applied in the axial direction of the spring 16 of the spike 14, the spring 16 contracts. When the thrust is further applied, the cutting tool is moved in the axial direction of the spring 16 of the spike 14, and the tip 19 of the spike bites into the stone or concrete 21. The cutting tool is moved in the cutting direction while maintaining the state where the tip 19 of the spike has been bitten.

FIG. 7 is a side view showing an example of cutting a stone or concrete while swinging with the tip of the spike as a fulcrum using the cutting tool of this embodiment.

With the tip 19 of the spike biting into the stone or concrete 21, the cutting tool is moved counterclockwise around the tip 19 of the spike as a fulcrum (FIG. 7-A).
Next, the position of the tip 19 of the spike is shifted downward, and the cutting tool is moved clockwise (FIG. 7-B). Such an operation is repeatedly performed, and the stone or concrete 21 is cut while the cutting tool swings and moves in the cutting direction.

[0020]

According to the present invention, the axial direction of the spike is set to an intermediate direction or 10 ° from the direction perpendicular to the thrust direction.
The portable power-type cutting tool to which the spikes are attached at an angle of from 40 ° is always applied with a thrust close to the cutting direction during cutting, and the force for suppressing the pulling force of the cutting tool can be reduced. Furthermore, in order to always urge the spike in the direction of the object to be cut by the urging means, and by sharpening the tip of the spike, it becomes easy to bite into stone or concrete, so in the case of a cutting tool using a long blade,
For example, in a chain saw, when the cutting is performed while swinging around the bite point as a fulcrum, the cutting can be performed with a reduced contact area of the cut surface of the chain saw.

From the above, according to the present invention, the cutting operation can be facilitated and the workability can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of a portable powered cutting tool as one embodiment of the present invention.

FIG. 2 is an enlarged side view around a spike, which is a part of FIG. 1;

FIG. 3 is a cross-sectional view around a spike, which is a part of FIG. 1;

FIG. 4 is a perspective view showing a state in which stone and concrete are being cut by the cutting tool of FIG. 1;

FIG. 5 is an enlarged side view around the spike of FIG. 4;

FIG. 6 is a cross-sectional view around the spike of FIG. 4;

FIG. 7 is a side view showing an example when stone and concrete are being cut while swinging with the tip of the spike as a fulcrum using the cutting tool of FIG. 1;

[Explanation of symbols]

1 ... chainsaw part, 2 ... chips, 3 ... chains, 6 ...
Body, 14 ... Spike, 16 ... Spring.

Claims (4)

[Claims] 1. A cutting tool which moves and cuts in the thrust direction while applying a cutting thrust along a surface to be cut of an object to be cut, wherein the cutting tool moves in a direction intermediate between the thrust direction and a direction perpendicular to the thrust direction. A portable power-type cutting tool, wherein a movable spike is attached to the body of the cutting tool, and the tip of the spike on the object side is sharpened so as to easily bite into the object. 2. A portable power cutting tool according to claim 1, further comprising a biasing means for constantly biasing said spike in the direction of the object to be cut. 3. A tool for cutting concrete or stone using a long blade, such as a chain saw, having a spike movable in a direction between 10 ° and 40 ° from a direction perpendicular to the thrust direction. The portable power-type cutting tool according to claim 1 or 2, characterized in that: 4. A cutting tool using a long blade, such as a chain saw or a saver saw, which cuts an object to be cut by reducing the contact area of the blade with a tip of a spike on the object side as a fulcrum. 3. The portable power-type cutting tool according to claim 1, wherein a cutting thrust is given while swinging the cutting tool.