JP2002059310A - Dustproof structure of reciprocating cutting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a seal member sealing between a slider and a main body housing from being damaged by high temperature metallic powder and the like scattering at cutting, by covering a front surface of the main body housing, in a reciprocating saw wherein the reciprocating slider is projected out from the front surface of the main body housing. SOLUTION: A main body cover 3 covering the main body housing 2 is extended to a front surface, thereby covering the front surface of the main body housing 2. A seal member 6 is shielded by a front surface cover 3a to prevent the damage thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a dustproof structure for a reciprocating cutting tool such as a reciprocating saw.

[0002]

2. Description of the Related Art For example, a reciprocating slider and a guide shoe which abuts against a cutting material at the time of cutting protrude forward from a front surface of a main body housing of the reciprocating saw. The slider protrudes through a dust-proof seal member attached to the front surface of the main body housing.

[0003]

Conventionally, since the above-mentioned sealing member has been mounted so as to be substantially exposed on the front surface of the main body housing, in the operation of cutting a metal pipe using the reciprocating saw, for example, a high-temperature There is a problem that the cutting powder is scattered and adheres to the seal member, and as a result, the seal member is damaged and the sealing effect is reduced. The present invention has been made in view of this problem, and has as its object to provide a dustproof structure that can prevent damage to a seal member.

[0004]

For this reason, the present invention provides a dustproof structure having the structure described in each of the above claims. Claim 1
According to the dustproof structure described above, the front of the seal member is shielded by the front cover, so that, for example, in the operation of cutting a metal pipe, high-temperature cutting powder immediately after cutting is prevented from adhering to the seal member. The sealing member can be prevented from being damaged, and the sealing effect can be maintained for a long period of time. According to the dustproof structure of the second aspect, the front surface of the main body housing can be covered by using the conventionally used main body cover, so that the above-described effects can be obtained without increasing the number of parts. Further, since the front cover is provided integrally with the main body housing, assemblability can be improved. According to the dustproof structure of the third aspect, the sealing performance of the front cover can be further improved in addition to the above-mentioned effects.

[0005]

FIG. 1 shows an embodiment of the present invention.
It will be described based on. FIG. 1 shows a front part of a reciprocating saw 1 provided with a dustproof structure of the present embodiment. The front surface of the main body housing 2 of the reciprocating saw 1 is covered with a rubber front cover 3a. A concave portion 4 is provided on the front surface of the main body housing 2, and a seal member 6 is attached to a deep portion of the concave portion 4. With this sealing member 6,
The inside of the main body housing 2 is shielded from the outside, so that a bearing for slidingly supporting the slider 7 (not shown)
Dust protection. Slider 7 passes through sealing member 6
Project forward from the front surface of the main body housing 2. The inside of the main body housing 2 is shielded from the outside by the seal member 6, thereby providing dustproof such as a bearing for slidingly supporting the slider 7. The slider 7 reciprocates along its axial direction by an electric motor and a reciprocating mechanism (not shown) incorporated in the main body housing 2. A blade attachment device 5 for attaching a blade (saw blade) B is attached to the tip of the slider 7. A support bar 9 protrudes from the front surface of the main body housing 2 in addition to the slider 7. A guide shoe 8 is attached to the tip of the support bar 9. The guide shoe 8 has a function of abutting against a cutting material (not shown) during a cutting operation to maintain a constant distance between the reciprocating saw 1 and the cutting material.

The slider 7 and the support bar 9 project from the front cover 3a covering the front surface of the main body housing 2 forward and parallel to each other. A slider insertion hole 3b is formed in the front cover 3a, and a lip piece 3c that protrudes forward is formed around the entire periphery of the slider insertion hole 3b. This lip piece 3
c is elastically pressed over the entire circumference of the slider 7, thereby shielding the recess 4 and thus the seal member 6 from the outside. A support bar insertion hole 3d is formed in the front cover 3a, and the support bar 9 protrudes forward through the support bar insertion hole 3d. The fixing plate 10 is overlaid on the front cover 3a. This fixing plate 10 is fixed to the front surface of the main body housing 2 by screws 11 to 11. A front cover 3a is sandwiched between the fixing plate 10 and the front surface of the main body housing 2, whereby the front cover 3a is fixed along the front surface of the main body housing 2.

According to the dustproof structure of the present embodiment configured as described above, the front surface of the main body housing 2 has the front cover 3a.
The front of the seal member 6 is shielded from the outside by the front cover 3a. For this reason, for example, high-temperature metal powder immediately after cutting generated during the cutting operation of the metal pipe is prevented from adhering to the seal member 6, thereby preventing damage to the seal member 6 and improving the sealing effect over a long period of time. Can be maintained. In the present embodiment, the main body cover 3 is attached to the main body housing 2.
And the front cover 3a is formed integrally with the main body cover 3 so that the above-mentioned effects can be obtained without increasing the number of parts. Can be.

Further, the lip piece 3c projecting forward is formed in the slider insertion hole 3b over the entire circumference thereof, so that the sealing property between the front cover 3a and the slider 7 can be further improved, and as a result, Damage to the seal member 6 can be more reliably prevented. Further, since the front cover 3a is sandwiched and fixed between the fixing plate 10 screwed to the front surface of the main body housing 2 and the front surface of the main body housing 2, flapping or displacement of the front cover 3a is prevented. In this respect, the shielding effect of the front cover 3a can be more reliably maintained.

Various modifications can be made to the embodiment exemplified above. For example, although the configuration in which the front cover 3a that covers the front surface of the main body housing 2 is formed integrally with the main body cover 3 has been proposed, the present invention is not limited to this, and the front cover formed separately from the main body cover 3 may be used. It may be configured to be attached to In addition, although the lip piece 3c has been described as being extended forward, the lip 3c may be extended toward the recess 4 or may be extended forward and backward.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention, and is a side view of a front portion of a reciprocating saw.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Reciprocating saw (reciprocating cutting tool) 2 ... Main body housing 3 ... Main body cover 3a ... Front cover, 3b ... Slider insertion hole, 3c ... Lip piece, 3d ... Support bar insertion hole 4 ... Depression 5 ... Blade mounting device 6 ... Seal Member 7: Slider 8: Guide shoe 9: Support bar 10: Fixing plate 11: Screw B: Blade

Claims (3)

[Claims] 1. A dustproof structure for a reciprocating cutting tool in which a slider protrudes reciprocally from a front surface of a main body housing, wherein a front cover is attached to a front surface of the main body housing, and the front cover covers the slider around the front cover. A dustproof structure of a reciprocating cutting tool configured to shield the front of the mounted seal member. 2. The dustproof structure of a reciprocating cutting tool according to claim 1, wherein a main body cover covering the main body housing is extended to the front side of the main body housing to shield the front of the seal member. . 3. The dustproof structure according to claim 1, wherein a lip piece is provided on the front cover and protrudes forward along an opening through which the slider is inserted, and the lip piece is elastically attached to a peripheral surface of the slider. Dustproof structure of reciprocating cutting tool with pressure contact.