JPS6257469B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotating brush used for polishing, deburring, removing paint, etc.

A conventional wheel-shaped rotating brush was constructed as shown in FIGS. 1 and 2. That is, 2
Brush bodies 4, 4 are formed by inserting a bundle of metal wires 3... into a large number of through holes 2... provided near the peripheries of the discs 1, 1. is held by side plates 5, 5 and a hollow cylindrical mounting portion 6 having a flange 6a at one end, thereby forming a rotating brush 7.

To assemble this rotating brush 7, first, one side plate 5 is inserted through the end of the mounting portion 6 where the flange 6a is not provided.

Next, attach the brush bodies 4, 4 to the mounting part 6 in the same way.
After inserting into the side plate 5, insert the side plate 5,
The flange 6a is formed by pressing the outside of the mounting part 6 on the side where the flange 6a is not formed, and these flanges 6a, 6a and the side plates 5, 5 are pressed.
They were fixed by welding or by inserting a pin (not shown) and caulking.

By the way, the work of inserting a bundle of metal wires 3 into the through-holes 2 of the disk 1 in this way is not only inefficient, but also results in uneven outer edges, which reduces the polishing ability. Therefore, it was necessary to cut the outer end to a certain length. In addition, in the case of the rotating brush configured in this way, the rotating brush main body 7
Although the cost of brush body 4 is large,
When it wears out, it cannot be reused and is discarded, which is extremely uneconomical.

This invention was made in consideration of the above-mentioned circumstances, and its purpose is that it is easy to manufacture, does not reduce durability, and can easily replace only the brush body when it wears out. The purpose is to provide an economical rotating brush.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 7. In the figure, reference numeral 11 denotes an elastic sheet such as a synthetic resin or a rubber plate, and a large number of metal wires 12 are punctured into this elastic sheet 11.
The metal wire rod 12... is formed of a wire rod cut into a predetermined length in advance, and has a bent portion 12 at its base.
a is formed. Then, the elastic sheet 1
After the metal wire rods 12 are punctured from the back side of the elastic sheet 11, the elastic sheet 11 is formed into a cylindrical shape with its ends brought into contact. Resin is injected into the inside and outside of the elastic sheet 11 to form elastic layers 13a and 1.
3b is molded to form the brush body 14. The inside of this brush body 14 is provided with a locking part 15 consisting of a serrated uneven part on the outer periphery, and a disk 17 with a mounting hole 16 that fits into the shaft of a power tool (not shown) in the center is a rotary brush body. 18, and is adapted to fix the brush body 14. That is, an elastic sheet 11 with metal wires 12 . . .
To form the parts a and 13b, a mold 19 shown in FIG. 6 is used.
is used. The mold 19 has an annular concave shape 20.
is formed. The width W of this concave portion 20 is equal to the sum of the length l of the metal wire 12, the thickness _t1 of the elastic sheet 11, and the thickness _t2 of the elastic layer 13a. When the elastic sheet 11 is rolled into a cylindrical shape and inserted into the recess 20 of the mold 19 as described above, the restoring force of the elastic sheet 11 causes the metal wire to
2 is pressed against the outer periphery of the elastic sheet 11, and fluidized resin is injected between the inner gap 21 of the elastic sheet 11 and the outer metal wire 12, and then the resin is cured at room temperature or by heating.
The elastic layer 13a is fixed to the inside of the metal wire 12, and the brush body 14 is formed as an elastic layer 13b in which metal wires 12 are embedded. Next, after extracting this brush body 14 from the mold 19, as shown in FIG. 7, this brush body 14 is expanded against its elastic restoring force, and the rotating brush body 18 is press-fitted inside it. do. In this case, since a locking portion 15 is provided on the outer periphery of the rotating brush body 18, this locking portion 1
5 bites into the elastic layer 13a, and the rotating brush body 1
A brush body 14 is integrally fixed to 8 to obtain a wheel-shaped rotating brush.

Next, FIG. 8 shows another embodiment of this invention,
In the above embodiment, the mounting hole 16 for mounting on a power tool is provided in the center of the disc 17, whereas both sides of the ring-shaped locking member 24 having a sawtooth-shaped locking portion 24a on the outer periphery are provided as side plates. It is designed to be held between 25 and 26. Side plate 25,2
Reference numeral 6 holds the ring-shaped locking member 24 at outer peripheral ends 25a and 26a, and has a mounting hole 27 formed in the center into which a shaft of a power tool (not shown) fits, thereby forming a rotating brush main body 28. Therefore, the brush body 1 is attached to this rotating brush body 28 in the same manner as described above.
It should be installed on 4.

Further, although a bent portion 12a is provided at the base of the metal wire 12 constituting the brush body 14, as shown in FIG.
Alternatively, a square U-shaped metal wire 12 may be used to adjust the wire density of the brush body 14. moreover,
As shown in FIG. 10, the metal wire 12 can be tilted in the forward or reverse direction with respect to the polishing direction (arrow direction), or the metal wire 12 can be bent in a dogleg shape and tilted in the forward or reverse direction. It can also be tilted and can be formed into a hard type or soft type depending on the purpose.

Furthermore, the ends of the elastic sheet 11 may be cut not only at right angles to the longitudinal direction but also diagonally as shown in FIG. 11 to increase the contact length.

As explained above, this invention has a brush body by piercing a large number of metal wires into an elastic sheet, bending the elastic sheet into a cylindrical shape, and injecting resin into the inside and outside of the sheet to form an elastic layer. This brush body is removably fitted to a rotating brush body that has a locking part on the outer periphery and a mounting hole in the center, so if the brush body becomes worn, it can be easily removed. The rotating brush body can be used repeatedly. Therefore, only the brush body is manufactured as a replacement part.
It can be sold and provided at a low price.

[Brief explanation of the drawing]

FIG. 1 is a diametrical longitudinal cross-sectional side view showing a conventional rotating brush, FIG. 2 is a perspective view showing a state in which a bundle of metal wires is inserted through this disc, and FIG. 3 is an embodiment of the present invention. FIG. 4 is a diametrically sectional side view of the elastic sheet, FIG. 5 is a cross-sectional view of the elastic sheet with a metal wire inserted into it, and FIG. 6 is a cross-sectional view of the elastic sheet with a metal wire inserted into it. A sectional view showing a mold for forming an elastic layer by injecting resin into the inside and outside, FIG. 7 is a sectional view showing a rotary brush body attached to a brush body, and FIG. 8 is another embodiment of the present invention. 9 is a side view showing another embodiment of the metal wire, FIG. 10 is a side view showing another embodiment of the metal wire, and FIG. 11 is a side view showing another embodiment of the elastic sheet. FIG. 11... Elastic sheet, 12... Metal wire, 13
a, 13b...Elastic layer, 14...Brush body, 15
... Locking part, 18 ... Rotating brush body.

Claims (1)

[Claims] 1. A brush body is constructed by bending an elastic sheet with a large number of metal wires punctured on its surface into a cylindrical shape, and providing an elastic layer made of a resin layer on the inside and outside of this elastic sheet. A rotating brush characterized in that the brush body is removably fitted onto the outer peripheral surface of a rotating brush body having a mounting hole by utilizing the elasticity of the brush body.