JPS6210047Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a paper holder for holding sanding paper in an electric orbital sander.

In the conventional product, a torsion bar type paper holder made of cotton is held on the upper surface of a grinding plate made of light metal by a supporting part formed integrally with the grinding plate, and when the pressure on the paper holder is released, the paper The operating arm of the holder was held at a corner of the side surface of the grinding plate.
Therefore, there is a drawback that the supporting portion and the corner portion of the side surface of the grinding plate are easily worn out by operating the paper holder every time the sanding paper is replaced.

Here, FIG. 1 shows a plan view of an embodiment of a paper holder structure according to the prior art. In FIG. 1, the paper holder 2 on the left side of the figure shows the paper holder when set, and the paper holder 5 on the right side of the figure shows the paper holder when pressure is released. Moreover, FIG. 2 is a side view of FIG.
This figure shows the state in which the paper holder 2 is removed when it is set.

That is, the paper holder 2 as shown in FIG.
When setting the grinding plate, the bearing hole 4 is worn due to torsional force, and when the paper holder 2 is released from pressure and the operating arm of the paper holder 2 is held at the corner 6 of the side surface of the grinding plate, the side corner 6 is worn out. wear,
This also caused wear on the side surface of the bearing hole 4 in FIG.

The purpose of the present invention is to eliminate the above-mentioned wear of the grinding plate, improve quality, and improve the operability of the paper holder.

This invention focuses on the fact that the area that requires wear resistance is not large considering the operation of the paper holder and the action of the load on the worn parts on the grinding plate. The shape is devised.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 6.

The electric orbital sander has an appearance as shown in Fig. 3, and the rotation of a motor housed in a housing 7 is transmitted by a belt to an eccentric pulley.
This portable power tool has the ability to eccentrically move the grinding plate 1 in conjunction with the eccentric movement of the pulley, and to grind the surface of the material to be ground using the sanding paper 10 attached to the bottom surface of the grinding plate 1. be.

In FIG. 3, only the parts related to the structure of the paper holder, which is the object of the present invention, are extracted and shown in FIGS. 4 to 6. FIG. 4 shows a plan view of the grinding plate 1, FIG. 5 shows a side view, and FIG. 6 shows a front view.

The paper holder 2 shown in FIGS. 4 to 6 is made of a wire rod such as a piano wire, and is supported by support plates 8 and 9 disposed on the upper surface of the grinding plate 1. The support plates 8 and 9 are made of a wear-resistant material such as an iron plate. In addition, the operating arm of the paper holder 2 is placed on the grinding plate 1.
The sanding paper 1 is held on top of the paper holder 2 by the twisting force between points A and B on the paper holder 2 shown in FIG.
In order to maintain the pressure of 0, a paper holder retaining protrusion 11 is provided.

As described above, when installing the sanding paper 10, the operating arm of the paper holder 2 at the time of setting is removed from the paper holder latching protrusion 11 to release the paper holder 2. At this time, the paper holder 2 is attached to the support plate. Rotates around support holes 8 and 9. Here, when the paper holder 2 rotates, the support plate 8 protrudes by an amount a from the end surface of the grinding plate 1, as shown in FIG. The support plate 9 and the fulcrum C of the operating arm in FIG. The distance between the outer side surfaces is C, and the distance between the end surface of the support plate 8 and the outer side surface of the support plate 9 in the figure is b, and the distance C is set shorter than the distance b. Therefore, at the same time as the paper holder 2 rotates, the paper holder 2
The operating arm slides on the end surface of the support plate 8, and its frictional force allows the paper holder 2 to stand still at any position. In addition, the support plates 8 and 9 satisfy the above relationship between the paper holder 2 and the support plate 8,
Moreover, it has the minimum necessary size and shape to be fixed onto the grinding plate 1 using screws or the like.

When sandwiching the sanding paper 10 between the paper holders 2, rotate the operating arm of the paper holder 2, place it on the top surface of the grinding plate 1, and pull the operating arm against the paper holder latching protrusion as shown in FIG. Hold the paper holder 2 and press the sanding paper 10.

According to the present invention, when operating the paper holder,
Since the wear of various parts related to the paper holder can be reduced compared to conventional ones, it is possible to provide a high-quality electric orbital sander with a longer life and also to maintain the paper holder fixed in a free position when attaching and detaching sanding paper, making it easier to sand. This has the effect of providing a sander with good paper attachment/detachment operability.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of a conventional paper holder structure, Fig. 2 is a side view of Fig. 1, and Fig. 3 is an example of an electric orbital sander having the paper holder structure of the present invention. Side view shown, 4th
The figure shows a plan view of an embodiment of the structure of the paper holder shown in FIG. 3, FIG. 5 is a side view of FIG. 4, and FIG. 6 is a front view of FIG. 4. In the figure, 1 is a grinding plate, 2 is a paper holder, 3 is a support part, 4 is a bearing hole part, 6 is a side corner of the grinding plate, 7 is a housing, 8 and 9 are support plates, 10 is sanding paper, 11 is a protrusion for hanging the paper holder.

Claims (1)

[Scope of utility model registration request] An orbital sander comprising a grinding plate made of light metal and a paper holder formed by torsion bars installed at both ends of the upper surface of the grinding plate and applied with a torsion force, and configured to press sanding paper with the paper holder. In the paper holder, two sets of wear-resistant support plates that support the paper holder are attached to both ends of the top surface of the grinding plate so as to slightly protrude from the side edges of the grinding plate, and the paper holder releases the pressure of the sanding paper. At this time, the operating arm of the paper holder moves while pressing the side corner of the wear-resistant support plate and locks it at a desired position, and the paper holder releases the sanding paper on the upper surface of the grinding plate. A sanding paper holding structure configured to maintain a fixed state while maintaining air gaps.