JP2900910B2 - Polishing tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing tool used for a hand-held polishing apparatus for reciprocating a polishing tool.

[0002]

2. Description of the Related Art Conventionally, a hand-held polishing device has been used for finishing and deburring a machine product such as a machine part or a mold. The hand-held polishing device is of a type that rotates a polishing tool and a type that reciprocates the polishing tool. There are two types, depending on the shape of the surface to be polished. The former type of hand-held polishing apparatus that rotates a polishing tool is extremely versatile and supports various shapes of the surface to be polished. The latter hand-held polishing apparatus that reciprocates the polishing tool, chucks a flat file-shaped polishing tool with a rectangular cross section to the holder, holds it with the inclination just like holding a writing instrument, and holds it on the desired surface to be polished. Generally, a flat portion or a corner rising from the flat portion is polished in such a manner that the tip of the polishing tool is beaten little by little.

[0003]

The above-mentioned hand-held polishing apparatus for rotating a polishing tool is extremely versatile as described above, however, as shown in FIG. At the corner C of the bottom surface such as the square hole H with the bottom and the irregularly shaped hole with the bottom, the unprocessed portion h1 always remains even if the polishing tool T having a small diameter is used. Further, in consideration of the strength of the polishing tool T, the diameter cannot be reduced indiscriminately. Therefore, such a corner portion is used in place of the latter hand-held polishing device of the type that reciprocates the polishing tool,
In the case of a deformed hole having a depth with respect to the hole diameter, when the hand-held polishing apparatus is inclined as described above, the polishing tool interferes with the hole, and the polishing process may be restricted. Even if the hole can be held inclined, the corner of the bottom surface of such a hole is difficult to work with a flat file-shaped polishing tool having a rectangular cross section, and the efficiency is low. Therefore, an object of the present invention is to provide a polishing tool which is used for a reciprocating type hand-held polishing apparatus and is mainly suitable for polishing a hole bottom having an arbitrary shape.

[0004]

Means for Solving the Problems The technical means taken to achieve the above object comprises a grindstone portion for performing polishing and a main body having an axial shape for supporting the grindstone portion. However, by pressing the grindstone portion on the surface to be polished in a direction orthogonal to the longitudinal direction of the main body and reciprocating the main body base, the grindstone portion reciprocates along the surface to be polished so that the intermediate portion from the grindstone portion. Characterized by being configured to be elastically deformable over a range of According to the above-described means, the main body having an axial shape that supports the grindstone portion is configured to be elastically deformable from the grindstone portion to the middle portion, so that the vertical movement imparted to the main body base portion is reduced in the horizontal direction. Then, the grindstone portion pressed against the surface to be polished in the direction orthogonal to the longitudinal direction of the main body reciprocates along the surface to be polished. Although the above-mentioned main body may be made of a synthetic resin material such as nylon or Duracon, or a metal such as stainless steel or spring steel, it is preferable that the main body be made of a synthetic resin material that does not damage the work. Examples of the polishing tool configured as described above include a tool in which the grindstone portion and the main body are formed as separate members and integrated, and a tool in which the tip of the main body is formed into a file shape and formed as a single member. 1).

[0005] The main body is characterized in that the main body is divided vertically from the main body tip portion to a halfway portion, and the grindstone portion is provided for each divided portion. According to this means, the vertical movement imparted to the main body base is converted into a horizontal movement, and the plurality of grindstone portions pressed against the surface to be polished in a direction orthogonal to the longitudinal direction of the main body are connected to the surface to be polished. Reciprocate so as to approach and separate along the top. As the aspect of the above-described vertically divided division formation, as viewed in plan, the grinding stone portion is divided so as to reciprocate so as to approach and separate radially, and the opposed grinding stone portion is linearly approached and separated. One divided so as to reciprocate can be cited (claim 2).

[0006]

Next, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 5 illustrate the first embodiment, FIGS. 6 to 9 illustrate the second to fifth embodiments, and FIG. 10 illustrates a reciprocating type hand-held polishing apparatus. Reference numeral 1 denotes a main body, reference numeral 2 denotes a grindstone portion, and reference numeral B denotes a reciprocating type hand-held polishing device.

As shown in FIG. 1, a polishing tool A according to the first embodiment includes a main body 1 and a grindstone portion 2. Body 1
Are formed in a bifurcated shape so as to be elastically deformable from a middle portion 12 of a flexible synthetic resin material having a rectangular cross section, and each of the deformed portions 11 having a rectangular cross section is uniform. In order to secure a sufficient strength, it is formed so as to be gradually thinner from the midway portion 12 toward the distal end and to be slightly curved outward. In the center of the upper end surface of the base 13 of the main body 1, an engagement hole 14 into which a connecting shaft S described later is inserted is inserted.
Is opened. The grindstone portion 2 is in the form of a sandpaper in which abrasive grains are fixed to a rectangular base material such as paper, synthetic resin, cloth, or the like. It is attached so that it can be replaced.

A reciprocating hand-held polishing apparatus B is shown in FIG.
By rotating the turbine b2 at high speed with the compressed air ejected from the nozzle b1 as shown in FIG. 0, the flexible connecting rod b4 eccentrically supported via the drive shaft b3 is eccentrically rotated, and the linear guide is rotated. The openable / closable chuck portion b6 communicated with the connecting rod b4 via the portion b5 reciprocates based on the amount of eccentricity. The chuck part b6 shown
Exemplifies a flat split type in which a V-groove b7 is provided in the longitudinal direction, so that both a polishing tool having a base having a rectangular cross section and a polishing tool having a round bar-shaped base can be sandwiched. I have.

The polishing tool A thus divided in a forked shape and configured to be elastically deformable from the grindstone portion 2 to the intermediate portion 12 is of the reciprocating type described above as shown in FIGS. After the base 13 of the polishing tool A is clamped and attached to the chuck b6 of the hand-held polishing apparatus B, the polishing apparatus B is reciprocated. The grindstone portion 2 is pressed against the bottom surface (surface to be polished) W of the square hole in a direction perpendicular to the longitudinal direction of the main body to be elastically deformed, and the opposing grindstone portions 2 are bottom surfaces of the square hole (polished surface). Polishing is performed by reciprocating while repeating approaching and separating linearly along W. The corner bottom of such a square hole can be easily polished as shown in FIG.

As shown in FIG. 4, a connecting shaft S having a diameter slightly larger than that of the engaging hole 14 is inserted into an engaging hole 14 formed in the center of the upper end surface of the base 13, and the connecting shaft S The other end is sandwiched by the chuck portion b6 along the V-groove b7, and the distance between the grindstone portion 2 and the polishing device B is extended, so that it is possible to cope with the surface W to be polished having a deep hole bottom. I have. Furthermore, body 1
Is made of a synthetic resin material, the additional processing can be performed extremely easily (cut with scissors). Therefore, as shown in FIG. 5, the shape of the tip 15 of the main body 1 is adjusted to the desired shape of the surface W to be polished. Can be applied to the surface W to be polished in any shape.

Next, the polishing tool A of the second to fifth embodiments will be described.
Will be described with reference to FIGS. The polishing tool A of these embodiments exemplifies another mode of division. Since the polishing tool A is basically the same as the polishing tool A described in the first embodiment, the description of the common parts will be omitted. The second embodiment illustrates an example in which the tip of the main body 1 divided into two branches described in the first embodiment is formed in a T-shape, and the T-shaped tip is used. The grindstone portion 2 described in the first embodiment is stuck on the lower surface in a replaceable manner. In the polishing tool A according to the second embodiment configured as described above, the grindstone portion 2 comes into contact with the surface W to be polished with a uniform pressure, so that the polishing can be performed efficiently.

Next, a polishing tool A according to a third embodiment will be described with reference to FIG. In the third embodiment, the main body 1 is formed so as to become thinner gradually from the middle part of the synthetic resin material having a rectangular cross section having flexibility to the front end, and to be slightly curved and elastically deformable. Together with the tip 15 of the body 1
A grindstone portion 2 having a rectangular shape is removably attached to the outside of the curved surface. The polishing tool A of the third embodiment configured as described above is suitable for polishing the bottom surface of a small-diameter hole with a bottom because the tip 15 is formed straight without being divided. .

Next, a polishing tool A according to a fourth embodiment will be described with reference to FIG. In the fourth embodiment, the main body 1 has three flexible portions (see FIG. 8 (1)) or four (see FIG. 8 (2)) from the middle portion 12 of the synthetic resin material having a flexible cross section. Each of the deformed portions 11 having a rectangular cross-section formed in a radially elastically deformable manner, and each of the divided portions is formed in an intermediate portion 12.
Is formed so as to be gradually thinner toward the front end and slightly curved toward the outside, and the rectangular grinding wheel portion 2 is re-placed outside the curved surface of the front end portion 15 of the main body 1. It is configured to be attached as possible. The polishing tool A according to the fourth embodiment configured as described above is suitable for polishing a bottom surface of a large-diameter hole having a large diameter because the tip portion 15 is radially divided and formed.

Next, a polishing tool A according to a fifth embodiment will be described with reference to FIG. In the fifth embodiment, the main body 1 is formed so as to be resiliently deformable in a vertically divided manner into four parts in parallel from an intermediate portion 12 of a synthetic resin material having a rectangular cross section having flexibility.
The respective deformed portions 11 having a rectangular cross section formed by division.
Is gradually thinner from the middle part 12 toward the tip,
The body 1 is formed so as to be slightly curved outward from the axis so as to face each other.
A grindstone portion 2 having a rectangular shape is removably attached to the outside of the curved surface. The polishing tool A of the fifth embodiment configured as described above is suitable for polishing the bottom surface of a rectangular bottomed hole because the tip end portion 15 is divided into four vertically divided portions. ing.

In the other embodiments except for the third embodiment, since the grinding wheels 2 are provided symmetrically or equidistantly, the forces due to elastic deformation are balanced. The polishing apparatus B can be stably held perpendicularly to the surface W to be polished without acting on the surface to be polished W. Therefore, the respective pressing portions 2 are given a uniform pressing force, and an effect of easily obtaining a uniform finished surface can be obtained.

In the embodiment described above, the main body 1 and the grindstone 2 are formed as separate members and the grindstone 2 is attached to the main body 1. However, the main body 1 and the grindstone 2 are integrally formed. In this case, the abrasive grains may be directly fixed to the tip portion 15 of the main body 1 or the tip portion 15 of the main body 1 may be formed into a file shape. It is preferable that the main body 1 integrally formed with the grindstone portion 2 be made of stainless steel, spring steel, or the like in order to secure the hardness of the steel. Also, the third
It is optional to form the tip of the polishing tool of the fifth to fifth embodiments in a T-shape as exemplified in the second embodiment. Furthermore, the present applicant uses a hand-held polishing device of the type that swings with reciprocating motion proposed in Japanese Patent Application No. 8-109590, and chucks in such a manner that the grindstone portion reciprocates in a direction orthogonal to the swinging direction. By doing so, as shown in FIG. 11, polishing can be performed over a wider range (indicated by a two-dot chain line).

[0017]

As described above, the present invention has the following advantageous effects. According to the first aspect, the shaft-shaped main body that supports the grindstone portion is configured to be elastically deformable from the grindstone portion to the middle portion, so that the vertical movement imparted to the main body base portion is reduced in the horizontal direction. The grinding wheel pressed against the surface to be polished in the direction perpendicular to the longitudinal direction of the main body is reciprocated along the surface to be polished, so the unrotated part of the conventional rotary type polishing tool is inevitable. The corners of the bottom surface, such as a square hole with a bottom and an irregularly shaped hole with a bottom, can be easily polished. In addition, since the reciprocating type hand-held polishing apparatus is used upright with respect to the surface to be polished, there is no possibility that the polishing tool will interfere with the holes, so that the polishing process is not restricted. According to the second aspect, the vertical movement given to the main body base is converted into the horizontal movement, and the plurality of grindstone parts pressed against the surface to be polished in the direction orthogonal to the longitudinal direction of the main body are polished. Since the reciprocating motion reciprocates so as to approach and separate along the surface, the polishing can be efficiently performed over a wider range.

[Brief description of the drawings]

FIG. 1 is a perspective view of a polishing tool according to a first embodiment.

FIG. 2 is a longitudinal sectional front view showing a polished state of the same.

FIG. 3 is a sectional view taken along line (A)-(A) in FIG. 2;

FIG. 4 is a longitudinal sectional front view showing a polishing state in the extended state.

FIG. 5 is a cross-sectional plan view showing a state in which the tip of the main body is formed in an arbitrary shape in accordance with the surface to be polished;

FIG. 6 is a perspective view of a polishing tool according to a second embodiment.

FIG. 7 is a perspective view of a polishing tool according to a third embodiment.

FIG. 8 is a perspective view of a polishing tool according to a fourth embodiment; (1) shows an embodiment in which three are arranged radially;

FIG. 9 is a perspective view of a polishing tool according to a fifth embodiment.

FIG. 10 is a longitudinal sectional front view of a reciprocating type hand-held polishing apparatus.

FIG. 11 is an explanatory view showing a polishing range using another reciprocating type hand-held polishing apparatus.

FIG. 12 is an explanatory view showing a polishing state using a rotary type polishing tool.

[Explanation of symbols]

A: Polishing tool 1: Body 2: Grinding stone 12: Midway 13
... Base W ... Surface to be polished

Claims (2)

(57) [Claims] 1. A grindstone portion for performing polishing and a shaft-shaped main body that supports the grindstone portion, wherein the main body includes:
By pressing the grindstone portion against the surface to be polished in a direction orthogonal to the longitudinal direction of the main body and reciprocating the main body base, the grindstone portion reciprocates along the surface to be polished from the grindstone portion to the intermediate portion. A polishing tool characterized by being configured to be elastically deformable. 2. The apparatus according to claim 1, wherein the main body is divided vertically from the main body tip to a halfway portion, and the grindstone portion is provided for each divided portion. Abrasive tools.