JP3005452B2 - Flat bevel type rotating brush - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat bevel type rotary brush for polishing a surface of metal, non-ferrous metal or the like.

[0002]

2. Description of the Related Art An excellent polishing ability and a good finished surface can be obtained as a tool for polishing and finishing a metal processing surface or a welded portion and polishing and removing burrs and rust generated on the metal surface. Rotary brushes are often used. This rotary brush has a flat annular metal core having a U-shaped cross section and a concave portion on the outer periphery, a metal ring fitted into the concave portion of the core, and an intermediate portion provided on the ring. And a brush portion composed of a large number of wires whose both ends are projected radially.

[0003] The rotary brush is a flat bevel type, and has a caulking plate at the center, and a mounting portion such as a screw hole at the center of the caulking plate. And
Attach this rotating brush to a commercially available electric tool and rotate it,
By pressing the brush portion against the surface to be polished, burrs and rust on the mirror surface of the surface to be polished can be polished and removed.

By the way, a commercially available electric tool is shown in FIG.
As shown in FIG. 1, a flat disk-shaped grindstone 3 is mounted on a rotating shaft portion 2 of a power tool main body 1, and can be used as a grinder for grinding a surface to be ground. The power tool main body 1 is provided with a wheel guard 4 that covers a part of the grindstone 3 so that chips generated at the time of grinding and grindstone grains generated by abrasion do not scatter to the hand side.

[0005]

However, when the rotary brush 5 is mounted on the rotary shaft portion 2 of the electric tool body 1 instead of the grindstone 3, as shown in FIG. The brush part 6 is located below the wheel guard 4, and the brush part 6 cannot be covered by the wheel guard 4.

This is because a commercially available electric tool is designed so that it can be used as a grinder with the grindstone 3 attached thereto. It is possible to attach. Accordingly, when the rotary brush is mounted on a commercially available electric tool, the entire brush portion 6 of the rotary brush 5 is exposed, and the brush portion 6 expands in the outer peripheral direction due to centrifugal force and pressing force during rotation. . If the brush portion 6 spreads excessively in this manner, the tip of the wire becomes horizontal or upward and moves away from the surface to be polished, so that the middle of the wire comes into contact with the surface to be polished.

At this time, the middle of the wire constituting the brush portion 6 hits the edge of the core or the caulking plate.
Since a force is applied in a direction in which the wire is bent, there is a risk that the wire is broken during polishing, and the broken wire piece is scattered by centrifugal force.

The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent a brush portion from spreading too much during polishing and to provide desired hammering and scratching on a surface to be polished. An object of the present invention is to provide a flat bevel-type rotary brush that can maintain the polishing efficiency, improve the polishing efficiency, and cover the brush portion with a wheel guard even when the brush is mounted on a commercially available electric tool, and can safely perform the polishing operation.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a flat annular core having a U-shaped cross section and a concave portion on the outer periphery, A flat bevel-type rotary brush comprising a ring fitted into the concave portion, and a brush portion formed of a number of wires having both ends radially projected by hanging an intermediate portion on the ring; A disk-shaped lower caulking plate and a disk-shaped upper caulking plate having a diameter larger than that of the core, the upper portion of the brush portion being impregnated with rubber, A rubber layer having a predetermined thickness is formed so as to suppress deformation of the brush portion in the upward direction, and to prevent the middle of a wire constituting the brush portion from directly contacting the core and the upper caulking plate. That.

[0010]

According to the rotary brush having the above construction, since the upper layer of the brush is solidified by the rubber layer, the brush does not spread too much even if centrifugal force and pressing force are applied to the brush. The desired hammering and scratching of the surface to be polished can be maintained by the elasticity of the layer.

[0011]

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show a flat bevel type rotary brush. In the figures, reference numeral 11 denotes a flat annular metal core. The core 11 has a U-shaped cross section and a concave portion 1 on the outer periphery.
2 are provided. A metal ring 13 is fitted into the concave portion 12 of the core 11, and the ring 13 is folded in two, an intermediate portion 14a thereof is hooked, and a large number of wires having both ends projected radially. Brush part 15 consisting of 14
Is provided. The wire 14 used here is a steel wire,
It is a wavy line such as a brass wire or a stainless steel wire and has excellent cushioning properties, but may be a straight line.

A rubber layer 16 impregnated with, for example, urethane rubber is provided on an upper layer of the brush section 15. The thickness of the rubber layer 16 varies depending on the diameter of the rotating brush, that is, the length of the brush portion 15, but is preferably about 2 mm. Is formed.

Then, by pressing the core 11 from above and below, a large number of wires 1 including the rubber layer 16 are formed.
Numeral 4 is fixed by caulking via a ring 13, and is further caulked to the upper and lower surfaces of the core 11 by a lower caulking plate 17 and an upper caulking plate 18. The upper caulking plate 18 is disk-shaped, has a larger diameter than the outer diameter of the core 11, and has a bevel shape. Therefore,
The outer peripheral edge of the upper caulking plate 18 presses the brush portion 15 downward via the rubber layer 16 to form a flat bevel type rotary brush.

The shapes of the lower caulking plate 17 and the upper caulking plate 18 and the caulking method are not limited to those in the above-described embodiment, but can be changed as appropriate for an electric tool or an air tool.

According to the rotary brush described above, the brush portion 1
Since the rubber layer 16 is provided on the upper layer portion of the brush 5, the brush portion 15 is reinforced by the rubber layer 16, and the upward deformation of the brush portion 15 can be suppressed. Further, since the rubber layer 16 does not directly contact the middle of the wire 14 constituting the brush portion 15 with the core 11 and the edge portion of the upper caulking plate 18, the wire 14 can be prevented from being broken.

The flat bevel type rotary brush of the present invention
As shown in FIG. 3, the rotating shaft 20
, The brush portion 15 is covered by the wheel guard 21. Therefore, even if the cuttings and the wire 14 generated during polishing are broken and the broken wire pieces are scattered by centrifugal force, the wheel guard 21 does not move to the hand side, and the polishing operation can be performed safely.

Further, a desired pressing force of the brush portion 15 against the surface to be polished can be obtained by the elastic force of the rubber layer 16 during polishing, that is, desired hammering and scratching can be maintained, and the polishing efficiency can be improved. Can be planned.

[0019]

As described above, according to the rotary brush of the present invention, since the upper layer of the brush portion is solidified by the rubber layer, even if centrifugal force and pressing force are applied to the brush portion, the brush portion is not damaged. The brush part is not spread too much and is kept flat, so the brush part can be covered with a foil guard even when it is attached to a commercially available power tool. Even if it is scattered, it does not go to the hand side by the wheel guard, and the polishing work can be done safely. Furthermore, the brush portion can maintain desired hammering and scratching with respect to the surface to be polished by the elastic force of the rubber layer, and there is an effect that the polishing efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a rotary brush showing one embodiment of the present invention.

FIG. 2 is a perspective view of the rotating brush of the embodiment.

FIG. 3 is an exemplary perspective view of the rotary brush according to the embodiment in use;

FIG. 4 is a perspective view showing a relationship between a grindstone mounted on the electric tool and a rotating brush.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Core 12 ... Depressed part 13 ... Ring 14 ... Wire 15 ... Brush part 16 ... Rubber layer 17 ... Lower caulking plate 18 ... Upper caulking plate

Claims (1)

(57) [Claims] 1. A flat annular core having a U-shaped cross section and having a concave portion on the outer periphery, a ring fitted into the concave portion of the core, and an intermediate portion hooked on the ring. A flat bevel-type rotary brush comprising a brush portion composed of a large number of wires having both ends protruding radially; A disk-shaped upper caulking plate having a diameter larger than that of the core. A flat bevel type rotating brush, wherein a rubber layer having a predetermined thickness is formed so as not to directly contact the core and the upper caulking plate.