JPH0750141Y2 - Polishing tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a disk sander used when peeling an old coating film or forming and polishing putty in repairing an automobile.

[Conventional technology]

In the past, when the old coating film was abraded over a wide area, the efficiency was poor and it could not be processed in a short time unless a disk paper having a large diameter was used. Also, if you have a complicated dent or a small area, you can only grind the depth of the dent without using a paper with a small diameter, so remove the pad and paper screwed to the rotary shaft of the sander with a spanner, It was very troublesome to replace the one with a different diameter.

Similarly, when the putty is molded and polished, if the portion of the putty having a small area is polished with a large-diameter paper, the repaired area is expanded, and extra material and labor are required, resulting in an increase in cost.

[Problems to be solved by the invention]

The present invention has been made in view of the above points, and provides a disc sander in which a pad can be easily attached and detached so that a disc paper suitable for a polishing situation can be used, and variations in hardness and size can be incorporated. The purpose is to

[Means for solving problems]

The disk sander of the present invention is an electric or air motor driven disk-shaped disc, and is composed of a shaft center positioning means, a main pad with a surface fastener to which paper can be attached, and a light metal such as resin, rubber or aluminum. The base material is an arbitrary combination of cushioning materials such as a single substance or a sponge, and a leather or a hook-and-loop fastener for attaching a paper is arbitrarily formed on the surface, and the main pad and a pair of hook-and-loop fasteners are provided on the back surface. The hook-and-loop fastener is provided with a sub-pad configured to be attached to the main pad via the axial core positioning means composed of a combination of projections and depressions.

〔Example〕

 Next, an example implemented by the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory view of the operation of the present invention, and FIG. 2 is an enlarged sectional view with a part omitted.

Reference numeral 1 is a sander body, which has a disk-like shape with an appropriate elasticity on an electric or air motor driven rotary shaft, the interior of which is omitted.
The main pad 2 referred to in the present invention is screwed on.

The main pad 2 is made of a relatively light metal such as rubber or resin or aluminum material, and if necessary, a cushioning material such as a sponge is overlaid and molded, and the surface thereof is, for example, a Velcro (registered trademark) tape of magic type. A surface fastener 3 that can be repeatedly attached and detached is provided with an adhesive material such as the above so that paper can be attached, and a through hole 4 for positioning means of a shaft to be described later is formed in the center thereof. .

Reference numeral 5 denotes a sub pad referred to in the present invention, which has a diameter larger than that of the main pad, and its base material 6 is made of a light metal such as resin, rubber or aluminum material, and is formed into a relatively thin flat plate, A layer of a cushioning material such as a sponge shown in FIG. 2 may be provided in consideration of paper edge marks, scratches, etc., and a resin plate alone may be used in consideration of the hardness of contact with the surface to be polished. The soft rubber may be laminated on the aluminum plate. Or, of course, combinations other than this may be used,
The cushioning material layer 7 is preferably provided if necessary.

Further, since the magic type or the adhesive-attached disc paper 8 is attached to the surface of the substrate 6, an adhesive means 9 such as a laser or a surface fastener is formed, but the disc paper 8 is adhered by the adhesive. If
The adhesive means 9 may not be provided and may be directly attached to the base material 6. Of course, it may be attached to the place where leather is provided.

Further, a surface fastener 10 paired with the surface fastener 3 of the main pad 2 is provided on the back surface (upper surface in the figure) of the base material 6, and a protrusion 11 is provided at the center thereof. The protrusion
Reference numeral 11 is for fitting the main pad 2 and the sub pad 5 into the through hole 4 when the main pad 2 and the sub pad 5 are attached by the pair of surface fasteners 3 and 10. The through holes 4 and the protrusions 11 prevent the center runout when the main pad 2 and the sub pad 5 are bonded and rotated, and are a positioning means for the shaft core. Any number of these through holes 4 and protrusions 11 may be provided in any shape.

The axial center positioning means of the present invention is provided to prevent the misalignment of the pad during use by eliminating the need to visually or visually align the axial center.

Also, it is possible to attach a surface fastener equivalent to the main pad to the large diameter sub pad or draw a center by drawing a circle, but in order to bring out the shaft core with these methods, stick it many times. It takes time to fix it and the center does not come out accurately. In addition, it is dangerous because it may shift during use.

Therefore, if the surface of the main pad can be kept flat, for example, an annular recess may be formed on the surface of the main pad other than the present embodiment, and an annular protrusion may be provided on the sub pad. Further, it may be a sub pad having a concave attachment surface into which the entire diameter of the main pad can be fitted.

[Action]

When a wide range of polishing is performed with the disk sander of the present invention having the above-described structure, first, the large-diameter auxiliary pad 5 is attached to the small-diameter main pad 2 with the pair of surface fasteners 3 and 10. In this case, the protrusion 11 of the shaft center positioning means
Is inserted into the through hole 4 and the center is instantly determined.

Next, the disk paper 8 having the same size as the sub pad is laminated on the bonding means 9, the polishing surface is enlarged, and polishing is performed with this. The auxiliary pad 5 has various hardnesses and sizes, and a pad suitable for the polishing location is selected and used.

Because of this, it is possible to use a large-diameter disc paper after shrinking it. For example, in the drawing, the disc paper 8 is provided with a perforation of the same size as the diameter of the main pad 2, or a notch 12 such as a cut is provided in advance.
When the secondary pad 5 having a large diameter is used for polishing to reduce the peripheral polishing ability or when a paper having a small diameter is required, the disk paper 8 is peeled off from the pad to form a cutout portion.
The periphery of the main pad 2 is separated from 12, and polishing is performed with a small-diameter paper 13 having the same size as the main pad 2.

In addition, a plurality of notches having different diameters are provided, and auxiliary pads adapted to the notches are used so that they can be sequentially separated.

Also, whether it is a magic type or one with an adhesive, the ring-shaped large-diameter paper 14 with the central part of the disc paper hollowed out and the inner small-diameter paper 13 are used properly, and the main pad 2 fastened with screws is replaced one by one. Even if it is not necessary, it can be easily replaced.

The present invention also includes various deformations of the pad and the disc paper, and those with holes for dust absorption.

[Effect of device]

When mounting the polishing material on the pad, the center can be positioned instantaneously. Also, when the pad is rotated, the fitting part prevents lateral displacement, and the fastener bends laterally on the mounting surface by the length of the hair foot, just like a screw,
The A side digs deep into the pile surface of the B side, increasing the bond strength.
Therefore, it is possible to reduce the area used for the fastener, which is advantageous in manufacturing and cost. Above all, it is safe without falling off.

Since the polishing material mounting surface of the pad is flat, the conventional pad may be used as it is in the present invention, which does not impose a financial burden on the user. Further, the device of the present invention can also be used as a conventional pad for polishing paper or the like, so that it is convenient and convenient, and the work efficiency is improved without the need to change the polishing machine for each process.

Further, when the pad is provided with a cushioning material having appropriate flexibility and elasticity, the shock received from the surface to be polished is absorbed during use, and therefore wear of the fitting portion of the unevenness is suppressed. Furthermore, since the reaction of rotation is also absorbed, the shock to the fastener is mitigated to prevent damage. Further, the work can be softly contacted with the surface to be polished and the work is not damaged. Along with this, the life of the abrasive is extended. Then, as described above, the joint portion which is firmly joined can be disengaged by bending the pad.

Further, when the diameter of the pad is fitted in the concave portion of the abrasive, the peripheral edge of the pad is in the concave portion, so that the edge of the pad does not scratch the surface to be polished during use.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is an explanatory view of the operation, and FIG. 2 is an enlarged view of a pad portion with a part omitted. Explanation of symbols 1 ... Electric or air motor driven sander body, 2
...... Main pad, 3 …… Vehicle fastener, 4 …… Through hole for shaft center positioning means, 5 …… Sub pad, 6 …… Base material, 7
...... Cushioning material layer, 8 ...... Disc paper, 9 ...... Adhesive means such as leather or hook-and-loop fastener, 10 ...... Hook-and-loop fastener, 11 ...... Axial core positioning means protrusion, 12 ...... notch, 13 ... … Small diameter paper, 14 …… Round large diameter paper.

Claims (2)

[Scope of utility model registration request] 1. A small-diameter main pad mounted on a drive shaft for rotating a motor and having a flat surface for attaching an abrasive or an abrasive, and an abrasive having an abrasive attached to an auxiliary pad of large diameter. In the joint portion that can be joined via a surface fastener, a concave portion is formed on the main pad side in order to prevent center runout of rotation, while a convex portion is provided on the sub pad side. The polishing tool is characterized in that the portion is fitted in the recess of the main pad. 2. A main pad having a small diameter, which is mounted on a drive shaft of a motor rotation and has a flat surface for attaching an abrasive or an abrasive, and an abrasive having an abrasive attached to a secondary pad having a large diameter. In the joint portion of the polishing body that can be coupled to the main pad via a surface fastener, a concave sticking surface into which the diameter of the main pad is fitted is provided in order to prevent center runout of rotation. A polishing tool characterized by the above.