JP3138204U - Buffing board - Google Patents

Abstract

An object of the present invention is to accurately adjust a cutting force according to an operator's intention from a strong cutting force to a weak cutting force by increasing or decreasing a force pressing a buffing machine against a surface to be polished. Provided is a buffing machine that is free from the risk of scratches caused by biting abrasive grains by the edges of the surface.
A buffing machine is attached to the front end of an output shaft of a polishing tool and removably joined to the front surface of the rotating machine, and a backup board is provided at a portion facing the front surface of the rotating machine. The buffing machine is provided with a sponge board laminated and integrated on the front face of the backup board, and the front peripheral edge of the backup board is formed at an obtuse angle.
[Selection] Figure 3

Description

The present invention relates to a tool for polishing the surface of a member. More specifically, the present invention relates to an improvement of a buffing machine that is detachably attached to a rotating disk of an electric or air-driven polishing tool, for example, for polishing a body surface of an automobile, and is used in a final finishing process.

It is common practice to wax the body of an automobile. By the way, in relation to this processing, the surface of the body of the automobile is mirror-finished using an electric or air-driven polishing tool. This polishing tool has a buffing machine made of sponge or mop attached to the tip of the output shaft. For polishing with such a buffing machine, conventionally, hair or sponge is properly used depending on the state of the coating film to be surface-treated. For example, when a surface of a scratch on a paint film of an automobile body is subjected to a surface polishing treatment, it is not usually finished by a simple process, and a complicated process is usually performed depending on the state of the scratch and the number of polishing treatments. Generally speaking, there is a strong image of polishing so that scratches generated on the coating film are continuously polished to make the scratches difficult to see, but it is difficult to scrape off the scratches generated on the coating film.

Most of the scratches on the paint film on the body of the car are not attached to the surface of the paint film, but only the part of the paint has been removed. The following steps will be repeated. First, as an initial work, the worker makes a “slightly narrower and shallower wound” on the “wound to be erased” than this wound. Next, “slightly thinner and shallower scratches” are similarly applied on the “slightly thinner and shallower scratches”. That is, a process of thinning the initial scratch is performed in which a relatively large scratch locally generated on the surface of the automobile body is spread over a wide range while being gradually subdivided. Finally, polishing is performed until the subdivided “minimal scratches” are not visible.

In order to remove the scratches on the car body surface as described above, the material of the buffing machine is properly used. Specifically, when a rough polishing process is performed, a hair buffing machine is mainly used, and when a fine polishing process is performed, a sponge buffing machine is mainly used. It is necessary to consider combinations with other abrasives having different particle sizes.

Even if the above measures are taken, there remains a problem that the conventional buffing machine causes the abrasive grains to be bitten by the edges to cause new scratches.

Numerous ideas have been made to solve these problems, and the applicant of the present invention has proposed the following ideas regarding the buffing board. This device is a buffing machine intended to be able to accurately adjust the cutting force according to the operator's intention from a strong cutting force to a weak cutting force, and is a polishing tool for polishing the surface of various plate materials. In a buffing machine comprising a disk body that is detachably attached to an output shaft and rotated, and a buff body that is attached to the front surface of the disk body, a stress transmission member having a large number of projections or depressions between the disk body and the buffing machine It is characterized by providing (patent document 1).

JP 7-308862 A

As described above, as represented by Patent Document 1, the conventional buffing board has the following problems.

That is, scratches are generated when the abrasive is bitten by the edge of the buffing machine, and when the wax treatment is applied to the body of the automobile, the bite scratches appear. For this reason, it is not possible to adequately meet the needs of customers who want to make their car bodies more shiny.

Therefore, the buffing machine of the present invention was made in order to solve such a conventional problem, and the weak cutting force is changed from strong cutting force by applying strength to the force pressing the buffing machine against the surface to be polished. The purpose of the present invention is to provide a buffing machine that can accurately adjust the cutting force according to the intention of the operator and that does not cause the possibility of scratches caused by the abrasive grains being caught by the edge of the buffing machine. Yes.

Therefore, the inventors of the present invention have conceived that a gap having a relief function is formed on the sponge board side in the peripheral part of the backup board of the buffing machine, and when a prototype of the buffing machine is made based on this idea, the polishing scratches are greatly The knowledge that it decreases is obtained. The buffing machine of the present invention is embodied based on such knowledge, and the invention of claim 1 attaches a rotating disk to the tip of the output shaft of the polishing tool and can be attached to and detached from the front surface of the rotating disk. A buffing machine to be joined, and a backup board is provided at a portion facing the front surface of the rotating board, and a sponge board is laminated and integrated on the front surface of the backup board, and the front peripheral edge of the backup board is obtuse. It is a buffing board characterized by forming. The invention of claim 2 is characterized in that, in addition to the above feature of the invention of claim 1, the buffing board is provided with a connecting member on the back surface of the backup board, and the connecting member is constituted by a hook-and-loop fastener. It is a buffing board. The invention of claim 3 is a buffing machine characterized in that, in addition to the above feature of the invention of claim 1, the side surface of the backup board is formed in a tapered cross-section with the front narrowed. The invention of claim 4 is a buffing machine characterized in that, in addition to the above feature of the invention of claim 1, the side surface of the backup board is formed in a curved cross-section with the front narrowed.

It is an improvement of a buffing machine which is attached to an output shaft of an electric or air driven polishing tool, for example, used for mirror finishing of the body surface of an automobile. The polishing force can be accurately adjusted according to the operator's intention from strong cutting force to weak cutting force by increasing or decreasing the force pressing the buffing machine against the surface to be polished. In the final polishing process for finishing the body surface, there is an effect that there is no possibility that new scratches by which abrasive grains are caught by the edge of the buffing machine are generated.

Embodiments of the present invention will be specifically described below based on examples of the present invention shown in the accompanying drawings.

First, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall view of a polishing tool and shows a state in which a buffing machine is attached to a rotary disk at the tip of an output shaft. FIG. 2 is a perspective view of the preferred embodiment of the buffing machine as seen from the back. FIG. 3 is a cross-sectional view of the buffing machine in this embodiment. FIG. 4 is a cross-sectional view of a buffing machine according to another embodiment.

FIG. 1 shows an overview of an electric polishing tool. The polishing tool 10 has a motor 12 built in an insulating body 11. A rotating disk 14 is fixed to the tip of the output shaft 13 of the motor 12. On the side surface of the body 11, grips 15 and 16 for holding the heavy polishing tool 10 are provided. In addition, a power cord connected to the motor 12 is drawn from the tip of the grip 15, and an ON / OFF switch is provided at the base of the grip 15.

A turntable 14 is fixed to the tip of the output shaft 13 of the motor 12, and a buffing board G is detachably attached to the front surface of the turntable 14. The buffing board G is composed of a plurality of disc bodies made of different materials, and is configured by laminating the sponge board 1 on the backup board 2 from the rotating board 14 side. The buffing machine G shown in FIG. 1 is obtained by providing a backup board 2 at a part facing the rotating board 14 and bonding the sponge board 1 to the front surface to integrate them. As one means for attaching / detaching the buffing board G to / from the turntable 14, the buffing board G is bonded to the front surface of the turntable 14. Alternatively, as the means 2 for attaching and detaching, one surface fastener is provided on the front surface of the turntable 14 and the other surface fastener is provided on the back surface of the backup panel 2.

The detail of the Example which uses a hook-and-loop fastener for the buffing board G is shown in FIG. As shown in these drawings, the connecting member 3 is located on the back surface of the buffing machine G and is detachably connected to the rotating board 14 located on the front surface of the polishing tool 10. A hook-and-loop fastener, which is a so-called magic tape, is provided on the back surface of the disk-shaped connecting member 3 and the front surface of the disk-shaped rotating disk 14.

The sponge disk 1 is made of foamed resin and is a flexible disk. There are various materials, from hard to soft, foamed polyurethane foam resin is soft and polystyrene or polyethylene is hard. The material of the sponge board 1 used for polishing to mirror finishing as in the present invention is preferably soft foamed polyurethane.

Next, the cross-sectional shape of the buffing board G will be described. As shown in FIG. 3, the back-up board 2 is bonded to the front surface of the connecting member 3, and the sponge board 1 is further bonded to the front surface of the back-up board 2, and these three members are integrated into three layers of different materials. It consists of a structure in which disc bodies are stacked. And the side surface of the backup board 2 was made into the taper-shaped cross section which narrowed toward the sponge board | substrate 1 side, and it formed as the taper part E which inclines. Alternatively, as shown in FIG. 4, the side surface of the backup board 2 has a curved cross-section shape narrowed toward the sponge board 1, and is formed as a curved portion R formed of an arc. As a result, the front peripheral edge of the backup board 2 has an obtuse angle, and the front peripheral edge has an obtuse angle D1 or D2 as a cross-sectional shape as shown in FIG.

The buffing board is configured as described above, and the operation will be described next.

When using the polishing tool 10, the operator holds the grip 15 with the right hand and holds the grip 16 with the left hand, and polishes the part of the buffing board G against the body surface of the automobile, for example. First, the buffing machine G is attached to the rotary board 14, and then the polishing wax 1 and the abrasive are applied to the sponge board 1 in front of the buffing machine G so as to be immersed therein. In this way, the preparation for the polishing operation is completed, and the buffing machine G rotates with the rotating board 14.

The connecting member 3 is located on the back surface of the buffing machine G and faces the rotating board 14 located in front of the polishing tool 10, and each facing surface is provided with a surface fastener. Therefore, the buffing board G can be easily attached to and detached from the rotating board 14. The hook-and-loop fastener uses special nylon thread or polyester thread, and the numerous hooks and rings are tangled to exert a strong bonding force. On the other hand, it is easy to attach and detach, and the two members are permanently bonded. Convenient as a means or a means of temporary connection. By selecting a complex mushroom-shaped rod from a simple hook shape, the coupling force can be freely set. Therefore, the operator can obtain a target polished surface by preparing various buffing machines G according to the purpose of polishing and selecting from these.

An elastic material such as rubber or plastic is used for the turntable 14 on the polishing tool 10 side. Usually, these materials are formed into a disk shape, and the output shaft 13 is fixed to the center position. When performing the polishing operation, if the buffing machine G is slightly inclined and pressed against the surface to be polished, the rotating disk 14 bends backward, and the buffing machine G is pushed back by the repulsive force of the rotating disk 14, so that the surface to be polished and the buffing machine Appropriate frictional force is generated with G. Further, since the sponge board 1 in front of the rotating board 14 is flexible, it can be adapted to the curved surface of the surface to be polished to maintain a large contact area with the buffing board G, and uniform polishing is possible. Even when polishing a wide curved surface from a large curvature to a small curvature like the body surface of an automobile, the rotating disk 14 and the sponge disk 1 are freely deformed along the surface to be polished, so that polishing spots are eliminated. Since the sponge board 1 has flexibility, the outer peripheral part that is removed from the backup board 2 is particularly easily bent and deforms along a curved surface of a body of an automobile. On the other hand, since the sponge board 1 follows and deforms even on a surface with a small curvature due to the flexibility unique to the sponge, the pressing force against the surface to be polished is reduced and relaxed by the flexibility of the sponge, resulting in a light touch. Therefore, the final finish polishing can be performed without causing new scratches with the abrasive grains, and the coated body surface can be finished from the polished surface to the mirror surface. By using the buffing machine of the present invention, there is no risk of new scratches caused by the abrasive grains being bitten by the edge of the buffing machine in the final polishing step of finishing the coating surface of the automobile body.

On the other hand, since the sponge board 1 is easily deformed along the surface to be polished, the front edge portion of the backup board 2 usually bites into the sponge board 1 on the back side of the sponge board 1, and the polishing force concentrates on this biting portion. For this reason, it becomes easy to generate | occur | produce the damage | wound which took in the abrasive grain. In order to prevent this, in this embodiment, in order to make the front edge portion of the backup panel 2 an obtuse angle, the side surface of the backup panel 2 is formed in a taper shape that narrows toward the front, or is bent. That is, as shown in FIGS. 3 and 4, the taper portion E or the bent portion R is formed on the side surface of the backup board 2. By forming the taper portion E or the bent portion R, an obtuse angle portion D1 or an obtuse angle portion D2 whose corners are crushed is formed at a portion where the backup disc 2 bites into the back surface of the sponge disc 1. Thus, since the cross-sectional shape of the front peripheral edge portion of the backup disk 2 is formed at an obtuse angle, when pressing the buffing machine G against the surface to be polished, the sponge disk 1 is caused by a reaction force from the surface to be polished. Stress concentration is avoided or alleviated. As a result, the coating surface of the automobile body can be mirror-finished without leaving scratches due to the biting of abrasive grains. The shape of the side surface of the backup board 2 may be a shape whose diameter decreases stepwise toward the sponge board 1 in addition to the continuous taper portion E of FIG.

The use of the buffing machine of the present invention is not limited to the body surface of automobiles, but can be applied to mirror finishing of test pieces for taking micrographs of materials, mirror finishing of glass, or plastic finishing as required. Of course. Moreover, although this invention was applied to the grinding | polishing tool, you may apply to a sander grinder etc. Furthermore, the present invention is not limited to the electric motor type rotary polishing tool, and may be applied to an air motor type polishing tool.

BRIEF DESCRIPTION OF THE DRAWINGS It is a general view of the polishing tool which concerns on the Example of this invention, and shows the state which attached the buffing machine to the rotary disk at the front-end | tip of an output shaft. It is the perspective view seen from the back surface in the preferable Example of a buffing board same as the above. It is sectional drawing of the buffing board in a present Example same as the above. It is sectional drawing of the buffing board by another Example same as the above.

Explanation of symbols

D1, D2 Obtuse angle part E Taper part G Buffing board R Curved part 1 Sponge board 2 Backup board 3 Connecting member 10 Polishing tool 11 Body 12 Motor 13 Output shaft 14 Turntable 15, 16 Grip

Claims (4)

A rotating disk is fixed to the tip of the output shaft of the polishing tool,
A buffing machine detachably joined to the front surface of the rotating board,
A backup disk is provided at the part facing the front surface of the rotating disk,
A sponge board is laminated and integrated on the front of this backup board,
2. The buffing machine according to claim 1, wherein the front peripheral edge of the backup board is formed at an obtuse angle. The buffing board is provided with a connecting member on the back of the backup board,
The buffing machine according to claim 1, wherein the connecting member is formed of a hook-and-loop fastener. 2. The buffing machine according to claim 1, wherein a side surface of the backup board is formed in a tapered shape with a narrowed front part. 2. The buffing machine according to claim 1, wherein a side surface of the backup board is formed in a curved cross-sectional shape with a narrow front part.

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