JPH0541702U - Portable dust collecting circular saw - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a portable dust collecting circular saw, and its purpose is to prevent the gear cover from becoming hot by providing a cooling air discharge port on the inner wall of the gear cover. Is to improve the safety and workability of. By providing a cooling air discharge port 7 on the inner wall of the gear cover 3, the cooling air blown from a cooling fan 8 of the motor passes through the cooling air discharge port 7 as shown by an arrow C, and the rotary saw blade 5 rotates. Along the rotary saw blade 5 by force, the gear cover 3
It was sprayed on the upper surface of.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a portable dust collecting circular saw.

[0002]

[Prior Art]

 An example of such a dust collecting circular saw will be described with reference to FIGS. 3 and 4. The dust collecting circular saw includes a rotary saw blade 5 driven by a motor (not shown), a gear cover 3 that covers the rotary saw blade 5, a dust collecting case 1 that stores chips 2 generated during cutting, and a motor that cools the motor. It is composed of a cooling fan 8, a housing 4, a handle 6 held by an operator, and the like. Also, when cutting iron, etc. with poor machinability, very hot chips 2 are generated and the dust collection case 1 also becomes hot, which is dangerous. Therefore, the gear cover 3 and dust collection case 1 are made of aluminum with some heat resistance. Etc. However, the worker may come into contact with the dust collection case 1 that is at a high temperature due to the heat of the chips 2 and may get burned. I was doing

[0003]

[Problems to be solved by the device]

 When a circular saw cuts a material having poor machinability such as iron, it is usual to place a hand on the gear cover 3 to increase the pushing force of the main body. However, in the conventional dust collecting circular saw, even if the dust collecting case 1 is cooled, the gear cover 3 is not cooled, and therefore, there is a risk that an operator may get burned when the gear cover 3 comes into contact with the gear covering.

Further, in order to avoid the above-mentioned danger during the cutting work, it is necessary to place one hand on the housing 4 far from the rotary saw blade 5 for the work, and the straightness of the main body at the time of cutting the material is remarkably deteriorated. It was

An object of the present invention is to solve the conventional problems and improve safety and workability during work.

[0006]

[Means for Solving the Problems]

 The above object is achieved by providing a cooling air discharge port on the inner wall portion of the gear cover.

[0007]

[Action]

 In the portable dust collecting circular saw configured as described above, the cooling air from the cooling fan passes through the cooling air discharge port and is blown to the upper surface of the inner wall of the gear cover by the rotational force of the rotary blade to cool the gear cover.

[0008]

【Example】

 An embodiment of a portable dust collecting circular saw according to the present invention is shown in FIGS. The chips 2 generated by the rotating force of the rotary saw blade 5 driven by a motor (not shown) built in the housing 4 collide with the gear cover 3 and are accumulated in the dust collecting case 1 as shown by an arrow B. A cooling air discharge port 7 is provided on the inner wall of the gear cover 3. The cooling air blown from the cooling fan 8 of the motor passes through the cooling air outlet 7 as shown by an arrow C in FIG. Sprayed on the surface. Therefore, the temperature rise of the gear cover 3 due to the collision of the high temperature chips 2 can be prevented.

[0009]

[Effect of the device]

 According to the present invention, it is possible to prevent the gear cover from becoming hot by providing the cooling air discharge port on the inner wall portion of the gear cover of the portable dust collecting circular saw. In addition, since one hand can be placed on the top surface of the gear cover during cutting work and the straightness of the main body can be improved during material cutting, safety and workability during work can be improved.

[Brief description of drawings]

FIG. 1 is a partial sectional front view of a portable dust collecting circular saw according to an embodiment of the present invention.

FIG. 2 is a cross-sectional side view of a main part of FIG.

FIG. 3 is a partial front sectional view showing an example of a portable dust collecting circular saw.

FIG. 4 is a cross-sectional side view of a main part of FIG.

[Explanation of symbols]

Reference numeral 1 is a dust collecting case, 2 is a chip, 3 is a gear cover, 4 is a housing, 5 is a rotary saw blade, 6 is a handle, and 7 is a cooling air discharge port.

Claims (1)

[Scope of utility model registration request] 1. A handle portion to be gripped by an operator, a housing containing a driving electric motor, a rotary saw blade driven by the motor, and chips accumulated on a side portion of the rotary saw blade to accumulate chips. A portable dust collecting circular saw provided with a dust collecting case and a gear cover for covering the rotary saw blade, wherein a cooling air discharge port is provided on an inner wall portion of the front gear cover.