JPS6015642Y2 - orbital sander - Google Patents

Description

[Detailed description of the invention] The present invention consists of a grinding plate, a paper holder for fixing sandpaper, and a torsion coil spring, and the spring legs at both ends of the torsion coil spring are used to dispose the sandpaper between the paper holder and the grinding plate. The present invention relates to an orbital sander equipped with a torsion coil spring.

Although this type of orbital sander can firmly fix the sandpaper, it is necessary to install the torsion coil spring in a tensioned state, and this work inevitably reduces assembly efficiency.

An object of the present invention is to provide an orbital sander that can firmly fix sandpaper using a torsion coil spring and that is easy to assemble.

That is, in the present invention, one spring leg of the torsion coil spring is formed so as to extend outside the paper holder so that the assembly work can be performed while it is released, and when the spring leg is assembled, the spring leg is released into the upper space of the paper holder. During assembly, the torsion coil spring can be installed without any biasing force, and when the assembly work is completed, it is engaged with the operating arm of the paper holder to return it to the tensioned state and the paper holder is It is designed to be energized.

The present invention will be explained below with reference to the illustrated embodiments.

FIG. 1 is a perspective view of an orbital sander having a conventional sandpaper holding mechanism, and FIG. 2 is a perspective view of a sandpaper holding mechanism according to the present invention.

A general orbital sander has a motor housing 3 to which a handle 1 and a cover plate 2 are fixed.

A grinding plate 5 is attached to the cover plate 3 via a rubber leg 4.

A paper holder 6 is operatively attached to the front and rear parts of the grinding plate 5.

This paper holder 6 has a shaft 9 that is automatically incorporated into a pair of blocks 8 that are integrally formed on the upper surface 7 of the grinding plate 5.
is attached by.

Further, the paper holder 6 straddles a claw portion 11 that presses the sandpaper 10 against the grinding plate 5, an operating arm 12 extending perpendicularly to the claw portion 11, and a pair of blocks 8, and engages with the shaft 9. It is composed of a mounting part 14 having a mounting hole 13.

By pushing down the operating arm 12, the claw portion 11 is moved to the grinding plate 5.
It is becoming more and more separated from the people.

The torsion coil spring 15 is attached to the shaft 9.

When this torsion coil spring 15 is installed, one spring leg 16 of this torsion coil spring 15 engages with the paper holder 6, and the other spring leg 17 engages with the grinding plate 5 by pressure.
The claw portion 11 of the paper holder 6 is pressed against the grinding plate 5.

FIG. 1 shows an orbital sander with a conventional sandpaper holding mechanism, and as can be seen from this drawing, the paper holder 6 is placed in a predetermined position on the block 8, and the torsion coil spring 15 in a tensioned state is placed and held in place. It is difficult to attach the shaft 9 to the inner diameter portion of the torsion coil spring 15 through the attachment hole 13.

FIG. 2 shows an embodiment of the sandpaper holding mechanism according to the present invention.

In this embodiment, the spring leg 1 of the torsion coil spring 15 is
6' can be released into the space above the paper holder 6.
Since the torsion coil spring 15 is formed to extend outside the paper holder 6, the torsion coil spring 15 can be placed at a predetermined position in the released state.
Furthermore, the paper holder 6 may be placed over it, and the shaft 9 may be inserted.

After this, the bent portion 18 formed at the support end of the spring leg 16'
A positioning groove 19 formed in the operating arm 12' using
The spring leg 17' is engaged to apply a biasing force.

The positioning groove 19 also serves to prevent unintentional movement of the spring leg 16' during operation of the orbital sander.

As described above, according to the present invention, the paper holder can be easily attached to the grinding plate together with the torsion coil spring in the released state.
The torsion coil spring can then be tensioned.

Therefore, the assembly work of this type of orbital sander becomes easy, contributing to improvement of assembly efficiency, and the work of replacing the paper holder etc. can be performed extremely easily.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal side view of an orbital sander equipped with a conventional sandpaper holding mechanism, and FIG. 2 is a perspective view showing the sandpaper holding mechanism of the present invention. 5...Grinding plate, 6...Paper holder, 7...Top surface, 9...Shaft, 12...
...Operating arm, 15...Torsion coil spring, 16
, 16'17... Spring leg, 18... Bent part, 19... Positioning groove.

Claims (1)

[Claims for Utility Model Registration] 1. A grinding plate, a paper holder rotatably held on a shaft mounted with both ends supported on the upper surface of the grinding plate, and a paper holder mounted on the shaft, with legs attached to the paper holder. an orbital sander comprising a torsion coil spring arranged to engage the other leg of the holder with the grinding plate and press the paper holder against the grinding plate; A spring leg of a coil spring is formed to protrude outside the paper holder, and the spring leg is formed to extend so as to be engageable with an operating arm of the paper holder, and the spring leg is inserted into the upper space of the paper holder. An orbital sander characterized by a structure that can be freely released. 2. The orbital sander according to claim 1, wherein a bent part is formed at the tip of the extension part of the spring leg that engages with the operating arm of the paper holder. 3. The orbital sander according to claim 1, wherein a spring leg positioning groove is formed on the spring leg engagement surface of the operating arm tip of the paper holder.