JPH106171A - Duct collector for power tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply change the rotational movement position of a dust nozzle and prevent the uncareless change of the position which is set once. SOLUTION: In a belt sanding machine, a dust collector 10 consists of a dust nozzle 11 connected to a exhaust cylinder 8 in a mainbody housing 2 in a rotationally movable manner and a dust bag connected to the dust nozzle 11. In the large diameter 9 of the exhaust cylinder 8, a compression spring 15 is provided to push down a flange 13 peripherally provided on the insertion portion 12 of the dust nozzle 11 for energizing the dust nozzle 11 downward. A protrusion 17 is provided on the inner face of the exhaust cylinder 8 and cutouts 18, 18... to which the protrusion 17 can be fitted are formed in the opening of the insertion portion 12. When the dust nozzle 11 is pulled up against the compression spring 15 the dust nozzle 11 is rotationally movable and, when a hand is moved off, the cutout 18 of the insertion portion 12 is fitted to the protrusion 17 so that the dust nozzle 11 is fixed thereto at the position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power tool such as a belt sander and the like.
The present invention relates to a dust collection device that collects with dust collecting means such as a dust collection bag connected to a main body.

[0002]

2. Description of the Related Art A conventional dust collecting apparatus is disclosed in Japanese Utility Model Publication No. 53-2.
As disclosed in Japanese Patent No. 9267, a rotatable dust nozzle is connected to a joint cylinder protruding from the main body, and dust collecting means such as a dust collecting bag is attached to the dust nozzle so that cutting chips can be collected. . In particular, a rubber ring is interposed at a connection portion between the joint cylinder and the dust nozzle, and the resistance prevents the dust nozzle from being inadvertently rotated with respect to the joint cylinder, and the dust nozzle is moved to a desired rotation position. Rotational operation is possible.

[0003]

However, in this case, since the dust nozzle is fixed only by the resistance of the rubber ring, the dust nozzle rotates due to the weight of the dust bag or the suction pipe connected to the external dust collector. In some cases, the dust bag or the like cannot be fixed in a desired direction, which hinders the operation.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention has been developed to solve the above-mentioned problems, and not only can the dust nozzle be reliably fixed at a desired rotational position, but also can be easily changed. Provided is a dust collecting device, the structure of which is provided with biasing means for slidably connecting the dust nozzle to the discharge cylinder and biasing the dust nozzle to one of front and rear sides in the sliding direction. Further, the dust nozzle and the discharge cylinder are provided with positioning portions which engage with each other at a sliding position of the dust nozzle by the urging means and at an arbitrary rotation position of the dust nozzle. is there.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a belt sander, and the rotation of a motor (not shown) built in the main body housing 2 is transmitted to a driving roller 3, and is disposed in parallel with the driving roller 3 (the right side in FIG. 1). The sanding belt 5 stretched between the tension roller 4 and the tension roller 4 is rotated between the two rollers so that the material to be ground pressed against the lower surface of the base 6 can be ground. As shown in FIG. 2, dust collecting fan 7 provided on the rotating shaft of the motor sucks dust generated during the grinding process and guides the dust to be sent out above main body housing 2 in main body housing 2. Means are provided, and as an outlet of the guiding means, a discharge tube 8 is provided so as to protrude above the main body housing 2, and a dust collecting device 10 is provided here.

The dust collecting device 10 includes a dust nozzle 11 connected to the discharge cylinder 8 and bent in a V shape, and a dust bag 19 connected to the dust nozzle 11. Insert the tapered portion 14 at the upper end into the connecting cylinder 20 to which the opening of the dust bag 19 is attached,
The dust bag 19 can be connected. On the other hand, discharge cylinder 8
The dust nozzle 11 is connected to the large-diameter portion 9 of the discharge cylinder 8 formed by dividing the dust nozzle 11 into the insertion portion 1 of the dust nozzle 11.
2 is sandwiched, and is rotatably and slidably gripped. In the large diameter portion 9, the dust nozzle 11 is inserted above the flange 13 provided around the insertion portion 12 of the dust nozzle 11. , A compression spring 15 is accommodated, and the dust nozzle 11 is
Side (forward in the connection direction). An O-ring 1 for sealing is provided below the flange 13 in the insertion portion 12.
6 is mounted. Further, a projection 17 as a positioning portion is provided below the large-diameter portion 9 on the inner surface of the discharge tube 8.
At the insertion portion 12 of the dust nozzle 11
As shown in FIG. 3, five notches 18, 18,... Which can be fitted with the projections 17 are also formed in the semicircular portion at 45 ° intervals. Any of the notches 18 is fitted to the projection 17 at the forward position of the insertion portion 12 urged by the actuator.

In the dust collector 10 configured as described above, since the dust nozzle 11 is urged in the direction of fitting with the projection 17, an arbitrary cutout 18 and the projection 17 are formed as shown in FIG. In the fitted state, the rotation of the dust nozzle 11 is prevented, and the weight of the dust bag 19 causes the dust nozzle 1 to rotate.
There is no accidental rotation of 1. When the dust bag 19 is obstructed by the work and it is desired to change its direction, the dust nozzle 11 is pulled upward against the urging force of the compression spring 15, and as shown in FIG. When the dust nozzle 11 is rotated in any direction as it is, and the hand is released, the notch 18 of the dust nozzle 11 which is urged downward again engages with the projection 17, and The dust nozzle 11 is fixed. Therefore, the grinding operation can be suitably performed without being disturbed by the dust bag 19. Further, the change of the rotation position can be easily performed with one touch. The notch 18,
18 may be provided evenly over the entire circumference of the opening of the insertion portion 12 in the dust nozzle 11, and the number and shape thereof can be changed as appropriate. Further, a scale, a click mechanism, or the like may be provided as a guide of the fitting position between the notch 18 and the projection 17. Further, in the above embodiment, the structure in which the small-diameter dust nozzle 11 is connected to the large-diameter portion 9 has been described.
A configuration in which the dust nozzle 11 is externally fitted to the discharge cylinder 8 to urge the dust nozzle 11 toward the connection side may be adopted.

On the other hand, in the above-described embodiment, the dust nozzle is urged downward (toward the main body housing) and is engaged with the positioning portion. On the contrary, the dust nozzle is moved upward (toward the main body housing). In the projecting position,
For example, a structure may be employed in which positioning portions between a projection provided on the outer periphery of the dust nozzle and a plurality of concave grooves provided on the inner periphery of the large diameter portion are engaged with each other. In this case, the rotation position can be changed by pushing the dust nozzle. As for the dust collecting means, the dust bag 11 is attached to the dust nozzle 11.
The present invention is not limited to the example in which the dust collecting unit 9 is mounted, and can be similarly applied to a type in which a suction pipe connected to an external dust collector is connected to the dust nozzle 11 to collect dust. Of course, the power tool to be employed is not limited to the belt sander, but can be applied to various tools such as an orbital sander, a canner, a circular saw, and the like, as long as a dust collecting device for collecting dust generated by the work is provided.

[0009]

According to the present invention, since the once set rotation position of the dust nozzle is reliably maintained by the engagement of the positioning portions, carelessness is imposed due to the weight of the dust collecting means such as a dust bag. The orientation of the tool does not change and does not affect the workability of the tool. On the other hand, the rotation position of the dust nozzle can be easily changed with one touch.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a belt sander.

FIG. 2 is an explanatory view of a dust collecting device (a dust bag and a connecting cylinder are omitted).

FIG. 3 is an explanatory diagram of a protrusion and a cutout portion.

FIG. 4 is an explanatory diagram showing a change state of a rotation position of a dust nozzle.

[Explanation of symbols]

1. Belt sander, 2. Body housing, 8. Drain cylinder, 9. Large diameter section, 10 Dust collector, 11 Dust nozzle, 14. Tapered section, 15 Compression spring, 17. Projection, 18 Notch, 19 Dust bag.

Claims (1)

[Claims] 1. A dust collecting device for a power tool, comprising: a dust nozzle rotatably connected to a dust discharge cylinder protruding from a main body housing; and dust collecting means connected to the dust nozzle. The dust nozzle is slidably connected to the discharge cylinder, and urging means for urging the dust nozzle toward one of the front and rear sides in the sliding direction is provided, and the dust nozzle and the discharge cylinder further include: A dust collecting device for an electric tool, wherein positioning portions are provided for engaging each other at a sliding position of the dust nozzle by an urging means and at an arbitrary rotation position of the dust nozzle.