JP2004066420A - Orbital sander - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an orbital sander capable of deforming and adjusting an abrasive material surface into any of a plane, a concave surface or a convex surface. <P>SOLUTION: Through the leaf springs 12, it is connected mutually, and the peripheral edge is connected through the bolt 17 with the central part operational from the outside, and the central part of the pad board 11 displaces the pad mounting shoe 7 and a pad board 11 to the pad mounting shoe 7 by rotating a bolt 17. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to improvements in orbital sanders.
[0002]
[Prior art]
At present, various types of orbital sanders, which are electrically driven or pneumatically driven, are commercially available, and are actively used for polishing a painted surface of an automobile body or the like.
For example, the body of an automobile is formed with as many curved surfaces as there is no exaggeration to say that it has virtually no flat part, but if it is damaged in an accident, etc., it is a general method to repair the damaged part. I work by stamping out the part, then applying a resin called putty, shaving it, and matching it to the surrounding press shape.
[0003]
[Problems to be solved by the invention]
However, re-shaving the curved surface requires considerable skill, and in particular, polishing the concave surface of the body using a conventional flat sander of a pad requires further skill.
[0004]
The present invention has been made in view of such a problem caused by a conventional sander, and a purpose of the present invention is to make a polishing material surface flat, concave, or convex at a work site as necessary. It is an object of the present invention to provide an orbital sander that can be appropriately deformed and used.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, an orbital sander according to the present invention is provided with a flexible body that is rotatably mounted on a main body containing a motor and an eccentric shaft provided eccentrically and integrally with a rotation shaft of the motor. An orbital sander having a pad mounting shoe attached to the main body via an elastic support, wherein the orbital sander is attached to the pad mounting shoe at a distance from the pad mounting shoe, and a part of the orbital sander is attached to the pad mounting shoe. An elastic plate for supporting the abrasive is provided so as to be adjustable to approach or separate from the pad, and a part of the elastic plate for supporting the abrasive is moved toward or away from the pad mounting shoe to thereby provide the elastic plate for supporting the abrasive. Is modified so that it can be used.
[0006]
According to the present invention, the pad mounting shoe and the abrasive support elastic plate have peripheral portions connected to each other via a leaf spring, and a central portion connected via externally operable bolts. ing.
[0007]
Further, according to the present invention, the abrasive plate supporting elastic plate can attach an abrasive member through a pad.
[0008]
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Hereinafter, embodiments of the present invention will be specifically described based on the illustrated embodiments.
FIG. 1 is a plan view of an orbital sander according to the present invention, and FIG. 2 is a sectional view taken along the line II-II of FIG. In the figure, 1 is a well-known pneumatic motor having a rotating shaft 1a, 2 is a silencer, 3 is an eccentric shaft formed integrally with the motor rotating shaft 1 with a predetermined amount of eccentricity and having a center hole 3a, 4 is Bolts 6 for mounting the counter balancer 5 to the motor rotating shaft 1 are fixed to a pad mounting shaft 7 and a bearing box 9 for rotatably mounting the pad mounting shaft 7 to the eccentric shaft 3 via a ball bearing 8. Is a flexible support made of four rubbers or the like, one end of which is fixed to the sander body 10 and the other end of which is fixed to the pad mounting shoe 7.
[0009]
The arrangement of the flexible support 9 and other detailed configuration and operation are well known as this type of orbital sander, and thus the description thereof will be omitted, but the rotating shaft 1a rotated by the supply of compressed air to the pneumatic motor 1 is described. Causes the orbital motion of the pad mounting shoe 7 by the cooperative action of the eccentric shaft 3 and the support 9, and the required polishing is performed with an abrasive material that can be mounted on the pad mounting shoe 7 through the pad. .
[0010]
Referring again to FIG. 2, reference numeral 11 denotes the same elasticity as the pad mounting shoe 7 in which the pad mounting shoe 7 is rectangular as shown in the drawing, and at least two opposing peripheral edges are connected by a leaf spring 12 having a U-shaped cross section. A pad plate (abrasive support elastic plate) 13 having the same shape and having a surface material for affixing an abrasive 14 to the surface thereof based on a flexible sponge and fixed to the pad plate 11; It is.
[0011]
Further, reference numeral 15 denotes a nut screwed to the lower end of the eccentric shaft 3 for fixing an inner ring of the bearing 8 fitted to the eccentric shaft 3, and 16 denotes a pad mounting shoe 7 housed in the bearing box 6. And a nut 17 supporting the outer ring of the bearing 8 and having a screw hole 16a at the center thereof aligned with the center hole 3a of the eccentric shaft 3, is screwed into the screw hole 16a of the nut 16 so as to be able to advance and retreat. The bolts are rotatably attached to the pad plate 11 by the reinforcing plate 18, the receiving box 19, and the cap 20, the flanges of which are fixed to the pad plate 11. The pad plate 11, the pad 13, and the abrasive 14 are provided with a common through-hole A aligned with the bolt 17, and the bolt 17 can be rotated by inserting a specific tool into the through-hole A. ing.
[0012]
Since the present embodiment is configured as described above, if a tool such as a screwdriver is inserted into the through hole A and the bolt 17 is rotated clockwise, for example, in the state shown in FIG. Then, it penetrates deeper into the center hole 3a of the eccentric shaft 3 to deform the pad plate 11, the pad 13 and the whole abrasive 14 into a concave shape as shown in FIG.
In the state shown in FIG. 2, when the bolt 17 is rotated, for example, in a counterclockwise direction, the bolt 17 is lowered to reduce the degree of entry into the center hole 3a of the eccentric shaft 3, and the pad plate 11, the pad 13 Then, the entire abrasive 14 is deformed into a convex shape as shown in FIG.
Therefore, if the bending properties of the pad plate 11 and the leaf spring 12 and the mounting structure of the leaf spring 12 are appropriately selected, the abrasive material surface can be easily and reliably formed into a convex or concave shape as needed at a work site. It can be used after being deformed.
[0013]
In the above embodiment, a pneumatic motor is used, but it is needless to say that an electric motor may be used instead.
[0014]
【The invention's effect】
As described above, according to the present invention, the shape of the surface of the abrasive material can be easily and reliably deformed appropriately at the work site, and therefore, the orbital sander which can be suitably used for polishing a surface having many curved surfaces such as an automobile body. Can be provided.
[Brief description of the drawings]
FIG. 1 is a plan view of an orbital sander according to an embodiment of the present invention.
FIG. 2 is a sectional view taken along the line II-II in FIG.
FIGS. 3A and 3B are partial cross-sectional views showing different deformation states of the abrasive material surface.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 motor 1a motor rotating shaft 2 silencer 3 eccentric shaft 3a center hole 4, 17 bolt 5 counter balancer 6 bearing box 7 pad mounting shoe 8 bearing 9 supporter 10 sander body 11 pad plate 12 leaf spring 13 pad 14 abrasive material 15 , 16 Nut 18 Reinforcement plate 20 Cap A Through hole

Claims (3)

A main body with a built-in motor, and a pad mounted on a main body via a flexible support that is rotatably mounted on an eccentric shaft provided eccentrically with respect to the rotation axis of the motor, and An orbital sander comprising a shoe and a pad mounting shoe which is attached to the pad mounting shoe so as to face the pad mounting shoe at a distance, and a part of which is connected to the pad mounting shoe so as to be able to approach or separate from the pad mounting shoe. A plate is provided, and a portion of the abrasive support elastic plate is moved toward or away from the pad mounting shoe so that the abrasive support elastic plate can be deformed and used. Orbital sander. 2. The pad mounting shoe and the abrasive supporting elastic plate are connected to each other at a peripheral edge thereof via a leaf spring and at a central portion thereof via a bolt which can be operated from the outside. Orbital sander described in. The orbital sander according to claim 1, wherein the abrasive material supporting elastic plate can attach an abrasive material via a pad.

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