JPS6232774Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an abrasive wheel in which coated abrasive paper such as sandpaper is planted on a disc-shaped wheel substrate.

Generally, the abrasive material of the abrasive wheel, which is attached coaxially to the rotating shaft of a hand grinder and used to polish the surface of metal, resin, wood, etc., is a whetstone, sandpaper, or abrasive nonwoven fabric impregnated with abrasive grains. ing. Rubber whetstones, vinyl whetstones, etc. are known as the above-mentioned whetstones, but they generally have poor compatibility with the surface to be polished, and have the disadvantage that problems such as clogging and matting of the surface to be polished due to frictional heat are likely to occur. However, the scope of application is narrow. Therefore, recently, polishing wheels in which sandpaper or coated abrasive paper such as abrasive nonwoven fabric cut into rectangular shapes are planted on the back side of a disc-shaped wheel substrate have been put into practical use in various fields.

A conventional example of the above-mentioned polishing wheel is explained with reference to Figs. 1 and 2. 1 is a hard disk-shaped wheel substrate made of fiber, and 2 is a plurality of wheels planted and fixed radially at equal intervals on the back surface of the wheel substrate 1. The sandpaper 3 is an epoxy resin adhesive that adhesively fixes the sandpaper 2 to the wheel substrate 1. Sandpaper 2 is cut into long rectangles,
Wheel board 1 with each polished surface aligned in the same direction.
planted on top. This polishing wheel 4 utilizes a mounting hole 5 drilled in the center of the wheel base plate 1.
For example, as shown in Fig. 3, a hand grinder 6
The polishing surface 8 is coaxially bolted to the rotating shaft 7 of the sandpaper 2, and the polishing surface 8 is polished by pressing one end 2' of the sandpaper 2 onto the surface 8 while rotating the polishing wheel 4 at high speed with a hand grinder 6. There is.

The characteristics of this polishing wheel 4 are that the raised sandpaper 2 itself has elasticity that improves its compatibility with the surface to be polished 8, and that air flows outward between the radially raised sandpaper 2. There is no need to worry about matting of the polished surface 8 due to the self-air cooling effect, and there is no need to worry about clogging because grinding debris is removed by the outflow of air. However, this polishing wheel 4 had the following problems.

That is, since this type of polishing wheel 4 is a consumable item and is attached to the hand glider 6, the wheel substrate 1 is particularly required to be inexpensive and lightweight. What is considered to be even more important is the mechanical strength of the wheel substrate 1, and a hard material is selected to prevent deformation during polishing. In other words, the wheel substrate 1 has been mainly made of fiber, which is cheap, lightweight, and hard.
The wheel base plate 1 is made of a hard material, and its central portion is bulged in order to increase its strength against external forces and prevent deformation, thereby further increasing the overall strength.

However, in the polishing wheel 4 using the fiber wheel substrate 1, the wheel substrate 1 sometimes warped in an irregular shape during storage. This is due to expansion of the wheel substrate 1 due to changes in temperature and humidity at the storage location.
Repeated shrinkage, sandpaper 2 and adhesive 3
This phenomenon is caused by the difference in coefficient of thermal expansion between When the wheel substrate 1 warps and deforms in this way, the sandpaper 2 may partially peel off or the wheel substrate 1 may crack, resulting in a series of defective products during storage, making long-term storage difficult. . Furthermore, when polishing is performed with the polishing wheel 4 of the warped wheel substrate 1, a strong force is concentrated on a part of the sandpaper 2, and the sandpaper 2 in that part peels off from the wheel substrate 1 and flies off. As a result, the sandpaper 2 around the sandpaper 2 would be instantaneously scattered, and there was a risk that the polishing wheel 4 would be easily destroyed, so great care was taken during the polishing work. In addition, as a measure to prevent such risks, for example, when attaching the polishing wheel 4 to the hand grinder 6,
An iron reinforcing plate that reinforces the wheel base plate 1 is attached to the rotating shaft 7 of the hand grinder 6, but the work of attaching and removing the reinforcing plate is troublesome and people often forget to attach it, so what is an effective risk prevention measure? I couldn't say it.

The present invention has been made in view of such conventional problems, and provides a polishing wheel in which a rectangular coated abrasive paper is planted and fixed on an elastic wheel substrate such as a rubber plate via an elastic adhesive. The present invention will be explained below with reference to examples.

In FIGS. 4 to 6, reference numeral 9 denotes a wheel substrate made of a circular rubber plate, and 10 denotes a plurality of abrasive coated papers, such as abrasive nonwoven paper, which are planted and fixed in a radial manner on the back surface of the wheel substrate 9 with an elastic adhesive 11. , 12 is a magic sheet for attaching and detaching the polishing wheel stuck on the surface of the wheel base plate 9, and 13 is a through hole bored at a plurality of locations in the wheel base plate 9 and the magic sheet 12. The abrasive nonwoven fabric 10 is a synthetic fiber nonwoven fabric impregnated with abrasive grains, and a plurality of long rectangular pieces are cut into radial polymers and then adhesively fixed to the wheel substrate 9. This abrasive nonwoven fabric 1
0 itself has elasticity, is highly water resistant and oil resistant, has good compatibility with the surface to be polished 8, and has the property of not clogging. In addition, the adhesive 11
has elasticity even after solidification, and synthetic rubber adhesives are the most effective.

Each of the constituent members of the polishing wheel 14 has elasticity, and since the wheel base plate 9 is a rubber plate with good moisture resistance, even if the wheel base plate 9 repeatedly expands and contracts slightly, it will not warp. There is no deformation,
Can be stored for long periods without requiring special care.
Further, the polishing wheel 14 is attached to a circular rubber substrate 15 coaxially fixed to the rotating shaft 7 of the hand grinder 6, as shown in FIG. 7, for example.
In other words, the rubber substrate 15 has a polishing wheel 14 on the back side.
A magic sheet 16 corresponding to the magic sheet 12 is fixed, and a working hole 17 is bored at a position corresponding to the through hole 13. Then, the polishing wheel 14 is attached to the rubber plate 15 by aligning the through hole 13 and the working hole 17 with the magic sheet 1 of both.
This is done in a one-touch manner by engaging 2 and 16. The polishing wheel 14 fixed to the back surface of the rubber substrate 15 in this manner is pressed against the surface to be polished 8 as shown in FIGS. 8 and 9. FIG. 8 shows an ideal usage state in which the abrasive nonwoven fabric 10 of the abrasive wheel 14 is pressed against the surface to be polished 8 with an even force, and FIG. 9 shows a state in which the hand grinder 6 is slightly tilted. In the case shown in FIG. 9, the polishing wheel 14 of the rubber substrate 15 is deformed integrally according to the inclination of the hand grinder 6, so the contact area between the surface to be polished 8 and the polishing nonwoven fabric 10 is not significantly damaged, and the Finish polishing is possible as shown in the figure. In addition, especially as shown in FIG. 9, the polishing wheel 14
Even if the abrasive nonwoven fabric 10 is slightly deformed, this deformation is easily carried out due to the flexibility of the abrasive nonwoven fabric 10, the adhesive 11, and the wheel substrate 9, and therefore there is no risk of the abrasive nonwoven fabric 10 peeling off and scattering. Furthermore, since the elasticity of the wheel substrate 9 and the rubber substrate 15 is added to the elasticity of the polishing nonwoven fabric 10 itself, the conformability of the polishing nonwoven fabric 10 to the surface to be polished 8 is doubled, and better polishing becomes possible. Further, during such a polishing operation, it is also possible to perform water polishing or oil polishing by supplying water or oil from the outside to the working hole 17 and the through hole 13.

Although it is also possible to plant a plurality of abrasive nonwoven fabrics 10 of the abrasive wheel 14 radially on the wheel substrate 9 at equal intervals, it is advantageous in terms of manufacturing to make them overlap radially as shown. That is, the 10th
As shown in the figure, if a long cylindrical body 18 is formed in advance by radially superposing a plurality of band-shaped abrasive nonwoven fabrics 10', and this cylindrical body 18 is cut into rings with a constant width, a plurality of sheets can be formed. The radially polymerized abrasive nonwoven fabric 10 can be easily produced and mass-produced. Further, although the polishing wheel 14 is attached to and detached from the rubber substrate 15 using magic sheets 12 and 16,
It may be done by bolt tightening as in the conventional method.
It is also possible to attach the polishing wheel 14 to a steel substrate depending on the application.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be modified in various ways. For example, as shown in FIGS. It is also possible to plant multiple sheets radially at equal intervals. In addition, this sandpaper 19 and the above-mentioned abrasive nonwoven fabric 1
0 are not limited to simply planting the same length radially on the wheel base plate 9, but may also be planting different lengths in an appropriate arrangement in a radial or spiral pattern.

As explained above, according to the present invention, there is no need to worry about the wheel substrate warping or deforming during storage.
This eliminates the trouble of defective products during storage, and allows us to always provide good products without deformation, greatly improving reliability. Furthermore, there are no accidents in which coated abrasive paper is scattered during polishing work, and safe work is possible. Furthermore, the elasticity of the wheel substrate improves its compatibility with the surface to be polished, making it effective for final polishing and the like.

[Brief explanation of the drawing]

Figures 1 and 2 are a back view and a sectional view taken along the - line of a conventional polishing wheel, Figure 3 is a sectional side view of essential parts showing an example of use of the polishing wheel in Figure 1, and Figures 4 and 5. 6 is a back view and partially omitted plan view showing an embodiment of the present invention, FIG. 6 is a sectional view taken along the line - in FIG. 4, and FIGS. Partial cross-sectional side views in each state shown, 1st
FIG. 0 is a perspective view illustrating an example of manufacturing a coated abrasive paper for a polishing wheel in FIG. 4, and FIGS. 11 and 12 are a back view and a sectional view taken along the line --, respectively, showing other embodiments of the present invention. 9...Elastic wheel substrate, 10...Abrasive coated paper (abrasive nonwoven fabric), 11...Elastic adhesive, 19...Abrasive coated paper (sandpaper).

Claims (1)

[Scope of utility model registration request] A polishing wheel characterized in that a large number of rectangular coated abrasive papers are radially planted on a wheel substrate made of a circular rubber plate via an elastic adhesive.