JP4346155B2 - Polishing tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a polishing tool in which a base end portion of a brush element is held inside a holding body.
[0002]
[Prior art]
FIG. 3 shows this type of polishing tool. In this polishing tool holder A, a holding part B and a shaft part C are integrally formed of metal. The holding part B has a large-diameter cylindrical shape, and its distal end is opened, while its base end is closed by the bottom wall D. The shaft portion C is a portion for holding the polishing tool on the collet of the polishing machine, has a cylindrical shape with a diameter smaller than that of the holding portion B, and extends from the outer surface of the bottom wall D to the shaft center in the holding portion B. Extending along.
[0003]
On the other hand, the brush element E of the polishing tool is a large number of linear bodies composed of natural hairs and fibers, synthetic resin hairs and fibers, and fine metal wires. In this brush element E, after applying adhesive F to the bottom wall D of the holding part B in the holding body A, each base end part is inserted into the holding part B, and the opening end part of the holding part B is further covered. By holding, it is firmly held by the holding body A.
[0004]
In the polishing tool configured as described above, the polishing machine is driven after being mounted on the collet via the shaft portion C, and the tip portion of the brush element E is polished in a state where it is rotated around the shaft center of the shaft portion C, for example. When pressed against the object, the tip of each brush element E comes into sliding contact with the object to be polished, and the object to be polished can be subjected to a desired polishing process.
[0005]
Usually, in the above-described polishing tool, the brush element E gradually wears with use. Since the polishing tool with worn brush element E has a risk that the tip of the holder A directly contacts the object to be polished and damages the object to be polished, the brush element from the tip surface of the holder A When the protruding amount of E falls below a predetermined length, it is replaced with a new polishing tool.
[0006]
[Problems to be solved by the invention]
By the way, the base end portion of the brush element E housed in the holding portion B of the holding body A (hereinafter simply referred to as the housing end portion E ′ of the brush element E) is not a portion subjected to polishing. Moreover, the receiving end E ′ of the brush element E is a portion that is discarded without being reused after being replaced with a new polishing tool. Therefore, in consideration of recent resource saving, it is preferable to shorten the length of the accommodation end E ′ of the brush element E as much as possible. That is, if the axial length of the holding portion B is shortened in the polishing tool, the receiving end E ′ of the brush element E can be shortened, and resource saving can be achieved.
[0007]
However, in this type of polishing tool, the outer dimensions are often standardized in order to ensure versatility with respect to an object to be attached such as a polishing machine. That is, in order to enable the use of a polishing tool for different types of polishing machines, the outer diameter and length of the holding portion B, the outer diameter and length of the shaft portion C, the initial protrusion amount of the brush element E, etc. The external dimensions are configured to satisfy a predetermined standard.
[0008]
For this reason, in the conventional polishing tool shown in FIG. 3, when versatility is ensured, the accommodation end E ′ of the brush element E cannot be shortened, and it is difficult to save resources. On the other hand, when resource saving is achieved, versatility is impaired.
[0009]
Moreover, in the above polishing tool, for example, even when manufacturing a polishing tool in which the initial protrusion amount of the brush element E is a, if the axial length of the holding portion B in the holding body A is b, the length is approximately a + b. The brush element E having a large thickness is required, and it is difficult to reduce the manufacturing cost. In particular, in the brush element E in which diamond particles are mixed as a polishing material into a resin material, the cost per unit length is extremely expensive, which causes a significant increase in manufacturing cost and the storage end. Since E ′ is wasted, the economic loss is significant.
[0010]
In view of the above circumstances, an object of the present invention is to provide a polishing tool capable of reducing cost and saving resources without impairing versatility.
[0011]
[Means for Solving the Problems]
In the present invention according to the first aspect of the present invention, the holding portion in which the distal end portion is open and the proximal end portion is closed by the first bottom wall and the outer surface of the first bottom wall in the holding portion along the axial center. The holding body integrally formed with the extending shaft portion and a bottomed cylindrical shape whose one end portion is closed by the second bottom wall, the second bottom wall facing the opening side of the holding portion. In a state where the inner bottom wall is disposed inside the holding body and located closer to the opening side than the first bottom wall, an insert that forms the inner bottom wall by the second bottom wall, and a number of linear shapes molded from resin Each body is mixed with an abrasive, and the base end portion of each linear body is inserted into the holding portion and fixed to the inner bottom wall with an adhesive, and the opening end portion of the holding portion painters crimped by a brush element which is held by the holding member, in that it consists of And butterflies.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings illustrating an embodiment.
1 and 2 show one embodiment of a polishing tool according to the present invention. The polishing tool exemplified here is used by being mounted on a collet of a polishing machine, like the polishing tool described above, and includes a holding body 10 and a brush element 20.
[0014]
The holding body 10 is formed by integrally forming the holding portion 11 and the shaft portion 12 with metal. The holding portion 11 has a large cylindrical shape, and has an opening 13 at the tip thereof, while its base end is closed by the bottom wall 14. The shaft portion 12 is a portion for holding the polishing tool on the collet of the polishing machine. The shaft portion 12 has a cylindrical shape with a diameter smaller than that of the holding portion 11 and extends from the outer surface of the bottom wall 14 to the shaft center in the holding portion 11. Extending along.
[0015]
In this holder 10, an insert 15 is disposed inside the cylinder of the holder 11. The insert 15 is formed of a synthetic resin material, and has a bottomed cylindrical shape whose one end is closed by the bottom wall 16. The insert 15 has an outer diameter large enough to fit inside the cylinder of the holding portion 11 and is shorter than the axial length of the holding portion 11 in the cylinder, for example, in the case of this embodiment, the inside of the cylinder The length in the axial direction is about ½. The insert 15 is fitted and arranged inside the cylinder of the holding part 11 with the bottom wall 16 facing the opening 13 of the holding part 11, and is inserted inside the cylinder of the holding part 11 by the bottom wall 16. A bottom wall 16 is formed.
[0016]
On the other hand, the brush element 20 of the polishing tool is obtained by mixing diamond particles as an abrasive into a large number of linear bodies formed of resin. The brush element 20 is formed by applying the adhesive 30 to the inner bottom wall 16 of the holding portion 11 in the holding body 10 and then inserting the respective base end portions into the holding portion 11 and fixing them with the adhesive 30. By caulking the opening end of the holding portion 11, the holding portion 10 is firmly held.
[0017]
In the polishing tool configured as described above, the polishing machine is driven after being mounted on the collet via the shaft portion 12, and the tip portion of the brush element 20 is polished, for example, while being rotated around the shaft center of the shaft portion 12. When pressed against an object, the tip of each brush element 20 is brought into sliding contact with the object to be polished, and a desired polishing process can be applied to the object to be polished.
[0018]
Here, according to the polishing tool, since the inner bottom wall 16 is configured by the insert 15 inside the cylinder of the holding portion 11 in the holding body 10, for example, polishing in which the initial protrusion amount of the brush element 20 is a. When manufacturing the tool, if the axial length of the holding portion 11 in the holding body 10 is b, a brush element 20 having a length of approximately a + b / 2 may be prepared. That is, compared with the conventional polishing tool shown in FIG. 3, the length of the brush element 20 can be shortened when manufacturing the one having the same outer dimensions, and the production cost is not impaired without impairing its versatility. Can be reduced. In addition, after replacement with a new polishing tool due to wear of the brush element 20, the brush element 20 having a length of approximately b / 2 is merely discarded, and resource saving is achieved compared to the previous polishing tool. Will also contribute.
[0019]
In the above-described embodiment, the inner bottom wall is provided in a portion that is approximately ½ the length of the holding body. However, the present invention is not limited to this, and the inner bottom wall is provided in other portions. You may make it provide. In this case, the smaller the length from the opening of the holding body to the inner bottom wall, the more remarkable the reduction in manufacturing cost and resource saving. However, the brush element of the polishing tool is a portion to which an extremely large force such as pressing and rotation is applied during the polishing process, that is, when the brush element is brought into sliding contact with the object to be polished. Therefore, it is necessary to secure a length that can sufficiently hold the brush element against these large forces between the opening of the holding body and the inner bottom wall.
[0020]
Further, in the above-described embodiment, the inner bottom wall is formed in the holding body by disposing the insert, so that it can be applied to the existing holding body without any processing. However, in the present invention, the inner bottom wall can be formed integrally with the holding body. In addition, in embodiment mentioned above when applying insert, since the thing which comprises resin-made bottomed cylindrical shape is illustrated, it is possible to suppress the increase in the weight of a polishing tool, but other than resin A material made of a material may be applied, or a solid material may be applied.
[0021]
Further, in the above-described embodiment, the brush element is exemplified by a number of resin-made linear bodies, but the present invention is not limited to this. For example, as a brush element, the base end portions are connected to each other, and the tip end portion is divided into a linear shape, or a strip shape is wound in a coil shape, etc. Any form may be used as long as it can be applied. In the case of applying a large number of linear bodies, natural hair and fibers may be applied in the same manner as before. Moreover, although the holding part is illustrated as a holding body having a cylindrical shape, it is not necessarily cylindrical, and any shape can be used as long as it can hold the brush element. I do not care. In this case, the material is not necessarily made of metal, and can be made of resin. Furthermore, it is not always necessary to have the shaft portion.
[0022]
【The invention's effect】
As described above, according to the present invention, the inner bottom wall is provided at a position located on the opening side of the bottom wall. The length of the portion to be accommodated can be shortened. As a result, the versatility is sufficiently secured and the brush elements are short, thereby reducing costs and saving resources. In particular, it is practical for extremely expensive brush elements composed of brush hair mixed with diamond particles. High value.
[0023]
Further, since the inner bottom wall is formed by disposing the insert inside the holding body, it can be applied to an existing holding body.
[Brief description of the drawings]
FIG. 1 is a sectional side view conceptually showing an embodiment of a polishing tool according to the present invention.
FIG. 2 is an exploded perspective view of the polishing tool shown in FIG.
FIG. 3 is a sectional side view conceptually showing a conventional polishing tool.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Holding body 11 Holding part 12 Shaft part 13 Opening 14 Bottom wall 15 Insert 16 Internal bottom wall 20 Brush element 30 Adhesive

Claims (1)

A holding portion whose front end portion is open and a base end portion is closed by the first bottom wall and a shaft portion extending along the axial center from the outer surface of the first bottom wall in the holding portion are integrally formed. Holding body,
One end portion forms a bottomed cylindrical shape closed by a second bottom wall, and is disposed inside the holding body in a state where the second bottom wall faces the opening side of the holding portion. An insert constituting an inner bottom wall by the second bottom wall at a position located on the opening side of the wall;
A large number of linear bodies formed of resin are mixed with abrasives, and the base ends of the linear bodies are inserted into the holding portions and fixed to the inner bottom wall with an adhesive. A polishing tool comprising: a brush element which is held by the holding body by caulking an opening end portion of the holding portion .

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