JP3807915B2 - Manufacturing method of cup-type rotating brush - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, power tools, and attached to the air tool or the like is rotated at a high speed, metal, a method for manufacturing a cup-shaped rotary brush for polishing the surface of the non-ferrous metals.
[0002]
[Prior art]
A cup-type rotating brush that provides excellent polishing performance and a good finished surface as a tool for polishing and finishing metal processed surfaces and welds and polishing and removing burrs and rust generated on metal surfaces. Many are used.
[0003]
Generally, a spring steel wire is used as the wire forming the brush portion of the cup-type rotating brush. Further, the outer casing for holding and fixing the brush portion, the inner casing, the caulking ring for connecting them, and the ring for fixing the wire are all made of metal.
[0004]
[Problems to be solved by the invention]
Therefore, the weight of the rotating brush itself is large, and the fatigue of the worker when polishing the metal surface by attaching it to the spindle of the air tool or power tool is great, and the burden on the air tool or power tool is also large. There's a problem.
[0005]
Further, the rotating brush is a consumable item, and when the brush is worn, it is discarded and replaced with a new one. In other words, the conventional rotating brush has a large number of wires arranged one by one, or is folded in two and hooked onto a ring and arranged radially, and this is interposed between the outer cage and the inner cage. In this state, it is integrally formed by caulking and fixing with caulking members such as nuts.
[0006]
Therefore, since the wire cannot be disassembled from the outer casing or inner casing, if the wire is worn, the entire rotating brush is discarded, and there are no outer casing, inner casing, or nut that is not damaged even if the wire is worn. As a result of disposal, resources are wasted and waste is increased.
[0007]
In addition, even when the brush part is made of nylon filament or polyamide or polyester chemical fiber mixed with abrasive grains, the outer casing, inner casing and nut are made of metal, so the brush section is worn. Even in the case of disposal, there is a problem that it is difficult to separate dust because the metal portion and the synthetic resin portion exist.
[0008]
The present invention has been made paying attention to the above circumstances, and the object of the present invention is that it can be manufactured at a light weight and at a low cost, reduces the fatigue of the worker during the polishing work, and also imposes a burden on the air tool and the power tool. It is to provide a method for manufacturing a cup-shaped rotary brush that can be reduced.
[0009]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention provides a lower jig having a conical tube portion and a bottom portion that protrudes horizontally outward from the lower end edge, and a diameter larger than the conical tube portion of the lower jig. Using the upper jig with both ends opening having a conical cylinder part, a large number of chemical fiber bundles cut to a predetermined length are aligned and leaned against the outer peripheral surface of the conical cylinder part of the lower jig A first step of contacting the lower end of the lower jig to the bottom of the lower jig; and the outer jig of the chemical fiber bundle leaning against the lower jig is fitted with the upper jig from the outside to form a conical cylinder portion. A second step of pressing the chemical fiber bundle against the conical cylinder part of the lower jig on the inner peripheral surface of the lower jig, and closely contacting the base end part thereof ;
A third step of welding only the base end portion of the chemical fiber bundle and integrally bonding to form a brush bundle, and the disk-shaped base formed of a synthetic resin material and having an annular groove on the lower surface thereof A fourth step of applying an adhesive to the annular groove; and removing the lower jig and the upper jig from the brush bundle, and fitting a base end portion of the brush bundle into the annular groove of the base. And a fifth step of bonding the base to the base.
[0012]
According to the said structure, since it consists of two parts, a base and a brush bundle, while being structurally simple, it is lightweight and can reduce an operator's burden. In addition, centrifugal force acts on the brush bundle during rotation of the rotating brush, but the proximal end of the brush bundle is heat-welded and solidified, so that the hair of the brush bundle can be prevented from being removed. Since the base end portion is fixed by an adhesive or the like while being fitted in the annular groove of the base, the brush bundle does not come out of the base and is excellent in safety.
[0013]
In addition, the rotating brush gradually wears due to the polishing operation, and the brush bundle becomes shorter and becomes unusable. However, since the rotating brush is a worn brush bundle with the base, the amount is small even if discarded. Yes, resource waste and waste can be reduced.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
FIG. 1 shows a cup-type rotating brush, (a) is a side view, (b) is a longitudinal side view, FIG. 2 is a longitudinal side view of the cup-type rotating brush in an exploded state, and FIG. It is process drawing. As shown in FIGS. 1 and 2, the cup-type rotary brush 1 is composed of two parts: a base 2 molded from a synthetic resin material, and a brush bundle 3 having a base end fixed to the base 2. .
[0016]
The base 2 was formed of a composite material mainly composed of phenol resin using mainly aramid fiber, glass fiber or the like as a reinforcing material, carbon powder or fluorine resin powder as a lubricant, and using these as binders. Is. In addition, not only phenol resin but raw materials, such as nylon resin, can be selected according to rotation speed.
[0017]
The base 2 is disc-shaped, and a mounting hole 4 having a female screw 4a for screwing and fixing to the spindle of an air tool or a power tool is provided at the center. An annular groove 5 is provided on the lower surface of the base 2 along the outer peripheral edge thereof. In addition, it is not always necessary to provide the female screw 4a on the inner peripheral surface of the mounting hole 4 of the base 2, and a simple hole may be used when mounting to the air tool.
[0018]
The brush bundle 3 is a chemical fiber bundle in which a large number of brush bristles 3a in which abrasive grains are mixed with nylon filament or polyamide-based or polyester-based chemical fibers are aligned, and both ends are aligned and cut to a predetermined length. . Further, the base end portion 3b of the brush bundle 3 is heat-welded, and at the same time, the hair bristles 3a are prevented from being removed, and at the same time, the brush hairs are prevented from being dispersed and scattered during the production of the brush.
[0019]
The base end portion 3b of the brush bundle 3 is fixed to the annular groove 5 of the base 2 with an adhesive 6 or the like. As the adhesive 6, an epoxy-based adhesive is suitable in terms of production, but is not limited to an adhesive and may be welded.
[0020]
The rotating brush 1 configured in this manner is lightweight because the base 2 is a synthetic resin material and the brush bundle 3 is also a chemical fiber brush hair containing abrasive grains, so that no metal is used. The rotary brush 1 can be easily attached by screwing the spindle of an air tool or electric tool into the female screw 4 a of the mounting hole 4 of the base 2. Then, the rotating brush 1 is rotated at high speed by an electric tool, and the tip or side of the brush bundle 3 is brought into contact with the surface to be polished, whereby the surface to be polished is polished by the chemical fiber brush bristles containing abrasive grains. Can do.
[0021]
Centrifugal force acts on the brush bundle 3 during the rotation of the rotary brush 1, but the base end portion 3b of the brush bundle 3 is thermally welded and solidified, so that the hair bristles 3a can be prevented from being removed. Since the base end portion 3b of the brush bundle 3 is fixed to the annular groove 5 of the base 2 with an adhesive 6 or the like, the brush bundle 3 does not come out of the base 2 and is excellent in safety. Yes.
[0022]
Further, the rotating brush 1 is gradually worn by the polishing operation, and the brush bundle 3 becomes shorter and becomes unusable. However, since the rotating brush 1 is the worn brush bundle 3 with the base 2, even if it is discarded, The amount is very small, and resource waste and waste can be reduced.
[0023]
Next, a method for manufacturing the cup-type rotating brush 1 will be described with reference to FIG.
[0024]
FIG. 3A shows a jig 11, which is composed of a lower jig 12 and an upper jig 13. The lower jig 12 includes a flat portion 14 provided on the upper surface, an inner conical cylinder portion 15 having a tapered portion inclined downward from an outer peripheral edge of the flat portion 14, and an outer side horizontally from a lower end edge of the inner conical cylinder portion 15. An annular bottom portion 16 that bends to the outside and an outer conical cylinder portion 17 that rises from the outer peripheral edge portion of the bottom portion 16. The upper jig 13 has a conical cylinder part 18 having substantially the same diameter as the outer conical cylinder part 17 of the lower jig 12, is substantially the same height as the inner conical cylinder part 15, and the upper and lower ends are open.
[0025]
Using the jig 11 configured as described above, a number of brush bristles 3a cut to a certain length are arranged on the bottom 16 of the lower jig 12 as shown in FIG. While standing up, a large number of brush bristles 3 a are uniformly arranged so as to surround the outer peripheral surface of the inner conical cylinder portion 15.
[0026]
In this state, as shown in FIG. 5C, when the conical cylinder portion 18 of the upper jig 13 is fitted from above, a large number of brush bristles 3a arranged on the lower jig 12 are removed from the upper jig 13. The conical tube portion 18 is pressed against the inner conical tube portion 15 to form a bundle, and the base end portions of a large number of brush bristles 3a are in close contact.
[0027]
In this state, when the base end portion of the brush bristles 3a is heated by a heating means such as a scissors or a burner, the bristles 3a are formed of polyamide-based or polyester-based chemical fibers. The base ends of the two are joined together. Then, as shown in FIG. 4D, the brush bristles 3a are integrally bonded at the base end portion 3b.
[0028]
Next, as shown in FIG. 5E, the base 2 is turned over and placed with the lower surface facing upward, and the adhesive 6 is applied to the annular groove 5. Thereafter, as shown in FIG. 5F, when the brush bundle 3 is removed from the lower jig 12 and the upper jig 13 and the base end portion 3b of the brush bundle 3 is fitted into the annular groove 5, the base of the brush bundle 3 is obtained. The end 3b is fixed to the base 2 by the adhesive 6 and integrated.
[0029]
The rotating brush 1 manufactured in this way can prevent the hair bristles 3a from being removed because the base end portion 3b of the brush bundle 3 is thermally welded and solidified, and the base end of the brush bundle 3 can be prevented. Since the part 3b is fixed to the annular groove 5 of the base 2 with an adhesive 6 or the like, the brush bundle 3 does not come out of the base 2 and a highly safe rotating brush 1 is obtained.
[0030]
The shape of the jig 11 is merely an example, and is not limited, and can be changed as appropriate.
[0031]
【The invention's effect】
As described above, according to the present invention, since it is composed of two parts, a base made of a synthetic resin material and a brush bundle made of a chemical fiber, it can be manufactured at a light weight and at a low cost, and can be manufactured by an operator during polishing work. This has the effect of reducing fatigue and the burden on the air tool and power tool.
[0032]
In addition, while the rotating brush rotates, centrifugal force acts on the brush bundle, but since the base end of the brush bundle is heat-welded and solidified, the hair of the brush bundle can be prevented from being removed. Since the base end portion is fixed by an adhesive or the like while being fitted in the annular groove of the base, the brush bundle does not come out of the base and is excellent in safety.
[0033]
In addition, the rotating brush gradually wears due to the polishing operation, and the brush bundle becomes shorter and becomes unusable. However, since the rotating brush is a worn brush bundle with the base, the amount is small even if discarded. Yes, resource waste and waste can be reduced. Furthermore, since all the rotating brushes are made of a synthetic resin system, even when discarded as garbage, there is no doubt about the separation of the garbage.
[Brief description of the drawings]
1A and 1B show a cup-type rotating brush according to a first embodiment of the present invention, in which FIG. 1A is a side view, and FIG.
FIG. 2 is a longitudinal side view of the cup-type rotating brush according to the embodiment in an exploded state.
FIG. 3 shows the embodiment, and (a) to (f) are manufacturing process diagrams of the cup-type rotating brush.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Rotary brush 2 ... Base 3 ... Brush bundle 5 ... Annular groove 6 ... Adhesive

Claims (1)

Using a lower jig having a conical cylinder part and a bottom part protruding horizontally outward from the lower end edge, and an upper jig having both ends opening having a conical cylinder part larger in diameter than the conical cylinder part of the lower jig,
First, a plurality of chemical fiber bundles cut to a predetermined length are aligned and leaned against the outer peripheral surface of the conical cylinder portion of the lower jig, and the lower end of the first bundle is in contact with the bottom portion of the lower jig. And the process of
The upper jig is fitted from the outside to the outer peripheral part of the chemical fiber bundle leaning on the lower jig, and the chemical fiber bundle is attached to the conical cylinder part of the lower jig on the inner peripheral surface of the conical cylinder part. A second step of pressing and closely contacting the base end portion ;
A third step of welding only the base end portion of the chemical fiber bundle and integrally bonding to form a brush bundle;
A fourth step of applying an adhesive to the annular groove of the disk-shaped base formed of a synthetic resin material and having an annular groove on its lower surface;
A fifth step in which the lower jig and the upper jig are removed from the brush bundle, and the base end of the brush bundle is fitted into the annular groove of the base to bond the brush bundle and the base. A method for producing a cup-type rotating brush.

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