JPH0212038Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Use The present invention relates to a polishing device that is suitably used when polishing a painted surface of, for example, an automobile body.

Prior Art FIG. 6 is a perspective view showing a typical prior art. A conventional polishing device 1 includes a polishing device main body 2 having a drive source 3, and a drive shaft 6 housed within the main body 2.
and a mounting plate 4 to which a polishing member 5 such as side paper is attached over the entire surface. Main body 2
There is a drive shaft 6 therein, one end of the drive shaft 6 is connected to the drive source 3, and the other end 6a is screwed with a mounting plate 4 by a mounting screw (not shown). At the end 6a of the drive shaft 6 on the side of the mounting plate 4, there is a center of rotation of the drive shaft 6.
A bearing (not shown) is mounted eccentrically about the center of rotation, and the mounting screw is screwed into the bearing.

The mounting plate 4 is made of a rectangular plate, and its polished surface is attached perpendicularly to the axis of the drive shaft 6, and the surface opposite to the main body 2 (the surface facing the surface to be polished) is coated with a polishing material such as sandpaper. A member 5 is removably attached with an adhesive. At the four corners of the surface of the mounting plate 4 facing the main body 2, cylindrical projections 7 made of elastic material such as rubber are provided, and the free ends of the projections 7 are fixed to the main body 2. This prevents the mounting plate 4 from rotating when the drive shaft 6 is rotated by the drive source 3, and since a bearing is mounted on the rotation center of the drive shaft 6 with the rotation center eccentric, the mounting plate 4 is circular. Exercise. Due to this circular movement of the mounting plate 4, the polishing member 5 attached to the mounting plate 4 polishes the painted surface.

Problems to be solved by the invention In the prior art as described above, the mounting plate 4 performs a circular motion to polish the painted surface, so if there is a step such as a protrusion on the painted surface, the side of the mounting plate 4 The part collides with the side surface of the protrusion intermittently, making it impossible to sufficiently polish every corner of the protrusion on the surface to be polished.

The purpose of the present invention is to solve the above-mentioned technical problems and to provide a polishing device that can easily polish all parts, especially corners.

Means for Solving the Problems The present invention provides a main body 11 held by an operator.
A drive source 40 that is provided on the main body 11 and has a drive shaft 12 and rotates the drive shaft 12; A mounting body 13 that has an outer circumferential surface that comes into contact with the obstacle 30; The drive shaft 12 and the mounting body 13 are mutually rotatable about an eccentric axis 19a that is interposed between the drive shaft 12 and the body 13, is parallel to the axis 12a of the drive shaft 12, and is eccentric from the axis 12a of the drive shaft 12. a means for coupling 100; a polishing member 26 attached to the mounting body 13 at a position offset from the eccentric axis 19a; a polishing member 26 extending substantially parallel to the axis 12a of the drive shaft 12, one end fixed to the main body 11 and the other end is the mounting plate 13
An elastic member 17 fixed to the drive shaft 12 and elastically deformed between the one end and the other end in response to displacement of the eccentric axis 19a with respect to the axis 12a of the drive shaft 12. be.

Effect According to the present invention, the main body 11 held by the operator is provided with a drive source 40, and the drive shaft 12 rotatably driven by the drive source 40 has the mounting body 13 mutually mounted around the eccentric axis 19a. A means 100 for rotatably supporting the drive shaft 12 is provided, and the eccentric axis 19a is parallel to the axis 12a of the drive shaft 12.
It is eccentric from the axis 12a of the mounting body 13.
A polishing member 26 is attached at a position offset from the eccentric axis 19a. One end of the elastic member 17 is fixed to the main body 11, and the other end is fixed to the mounting body 13.

Therefore, the outer peripheral surface of the mounting body 13 is an obstacle 30.
(See FIG. 3), the mounting body 13, and therefore the polishing member 26, are in contact with the elastic member 1.
Due to the elastic deformation of 7, as shown in FIG. 4, which will be described later, the surface to be polished can be polished by performing a movement that approximates a circle or an ellipse, for example.

When the outer peripheral surface of the mounting body 13 comes into contact with the obstacle 30, as shown in FIG.
Move back and forth along the As a result, even if there is a step such as a protrusion, it is possible to polish every corner of the protrusion. That is, a means 100 for rotatably connecting the drive shaft 12 and the mounting body 13 is interposed between the drive shaft 12 and the mounting body 13, and the drive shaft 12 and the mounting body 13 are arranged along an eccentric axis. 19a, one end of the elastic member 17 is fixed to the main body 11, the other end of the elastic member 17 is fixed to the mounting body 13, and the elastic member 17 is connected to the drive shaft. 12 axes 12
a, the polishing member 26 extends substantially parallel to the eccentric axis 1
9a, and therefore, when the obstacle 30 is linear as shown in FIG. As a result, the displacement of the attachment body 13 toward the obstacle 30 is restrained, so that the polishing member 26 undergoes elastic deformation in accordance with the displacement of the eccentric axis 19a of the elastic member 17 with respect to the axis 12a, that is, the attachment body 13 The polishing member 2 is elastically deformed to allow reciprocating movement along the obstacle 30 of
6 moves back and forth linearly along the obstacle 30.
In this way, the polishing member 26 can polish every corner of the corner.

Embodiment FIG. 1 is an exploded perspective view of a polishing apparatus 10 according to an embodiment of the present invention. The configuration of the polishing apparatus 10 will be explained with reference to FIG. The polishing device 10 includes a polishing device main body 11 that is held by an operator during work, and a main body 1.
1, a mounting body 13 that is a mounting body that is mounted on the drive shaft 12, a polishing member 26 that is mounted on the mounting body 13, and a locking protrusion 17 that is an elastic member.

The main body 11 is formed in a roughly L-shape, and has a drive source 40 such as an electric motor or a motor rotated by compressed air. The main body 11 has a mounting hole 14 having an axis perpendicular to the longitudinal direction of the main body 11.
is arranged at one end of the main body 11 in the longitudinal direction.
The axis of the mounting hole 14 and the axis 1 of the drive shaft 12 described later
The drive shaft 12 is embedded in the mounting hole 14, with the drive shaft 12 being the same as the drive shaft 2a. The drive shaft 12 is rotationally driven by the drive source 40 . An electric cord or air pipe for a drive source 40 is connected to the other end of the main body 11.

Further, the main body 11 is provided with a cylindrical locking hole 16 that constitutes a rotational movement blocking means 15 provided for blocking the rotational movement of the mounting body 13, which will be described later. The axis of the locking hole 16 is perpendicular to the longitudinal direction of the main body 11 and parallel to the axis 12a of the mounting hole 14 and the drive shaft 12, and opens in the opening direction of the mounting hole 14 (downward in FIG. 1). It is adjacent to the center (to the left in FIG. 1) of the mounting hole 14 in the longitudinal direction of 11. Into this locking hole 16 is inserted one end portion of a locking protrusion 17 fixed to a mounting body 13, which will be described later, which is another component of the rotation preventing means 15.

The drive shaft 12 is rotationally driven by the drive source 40 as described above. A mounting member 18 having the same axis as the axis 12a of the drive shaft 12 is integrally formed at the end of the drive shaft 12. Mounting member 1
8 has a mounting hole 19 as a circumferential cam for mounting a bearing 20 as a follower, and the axis 19
a is parallel to the axis 12a of the drive shaft 12 and at a distance
It is provided eccentrically by d1. The inner ring of the bearing 20 is threaded to form a threaded hole 21,
The mounting body 13 is screwed onto the bolt 22. The connecting means 10 includes these mounting members 18, mounting holes 19, bearings 20, screw holes 21, and bolts 22.
Configure 0. In this way, the drive shaft 12 and the mounting body 13
and are mutually rotatable about the eccentric axis 19a by means of the coupling means 100. The axis 19a of the mounting hole 19 and the axis of the bearing 20 are aligned, and this axis 19a is offset from the axis 12a of the drive shaft 12 as described above, so that the drive shaft 12 is aligned with the axis 12a of the drive shaft 12. When rotated around the
The axis 19a rotates around the axis 12a of the drive shaft 12 with a radius d1.

In the mounting body 13, an elastic member 24 made of, for example, sponge or rubber is fixed to one side of a support plate 23 made of a metal plate. A surface member 25 is attached. A polishing member 26 such as sandpaper is removably attached to the surface of the surface member 25 with an adhesive or the like at a position offset from the eccentric axis 19a. Support plate 23
By fixing the elastic member 24 to the surface, the polishing member 26 can correspond to the shape of the surface to be polished, and the surface to be polished can be uniformly polished. Moreover, by using the surface member 25 such as synthetic leather, the surface member 25
The polishing member 26 can be easily peeled off from the surface, and the polishing member 26 can be easily replaced. Furthermore, a buried hole 27 is provided in the longitudinal center of the attachment body 13 between the elastic member 24 and the surface member 25, which form a layer, and the bolt head of the bolt 22 for attaching the attachment body 13 to the bearing 20 is buried. This prevents the bolt head from damaging the polished surface during polishing. Further, an insertion hole 29 for the bolt 22 is provided in the longitudinal center of the support plate 23 .

On the surface of the mounting body 13 opposite to the support plate 23, the other end portion of a locking protrusion 17, which is an elastic member constituting a rotation prevention means 15 that prevents rotation of the mounting body 13, is provided.
It is fixed perpendicularly to the longitudinal direction of the support plate 23.
The locking protrusion 17 has a substantially cylindrical shape and is made of an elastic material such as hard rubber. A disc-shaped thin plate 27 made of metal is fixed to the free end of the locking projection 17 . The thin plate 27 is inserted into the aforementioned locking hole 16 so that one end of the locking projection 17 is fixed to the main body 11, and the free end of the locking projection 17 is fixed to the main body 11 when the polishing device 10 is used. This prevents damage to the product. In this way, the locking projection 17 is partially inserted into the locking hole 16, and the rotation of the locking projection 17 and the polishing member 26 fixed to the mounting body 13 around the axis 12a or 19a is prevented. , the inner diameter l1 of the locking hole 16 is the locking protrusion 17.
The locking protrusion 17 is thereby able to be inserted into the locking hole 16.
With the above configuration, the mounting body 13 is mounted so that the longitudinal direction of the mounting body 13 and the longitudinal direction of the main body 11 are substantially parallel. The locking protrusion 17 extends substantially parallel to the axis 12a of the drive shaft 12.

FIG. 2 is a diagram for explaining the operation of the mounting body 13, and FIG. 3 shows an obstacle 30 on the side of the mounting body 13.
FIG. 4 is a schematic diagram showing the locus of the tip A in the longitudinal direction of the attachment body 13 to which the polishing member 26 of the attachment body 13 in FIGS. 2 and 3 is attached. The operation of the polishing apparatus 10 will be explained with reference to FIGS. 1 to 4.

The drive shaft 12 is rotationally driven by a drive source 40. As a result, the mounting member 18 and the bearing 2
0, and the mounting body 13 screwed onto the bearing 20 by the bolt 22 is driven. Here, the end of the locking protrusion 17 is fixed to the mounting body 13, and the free end thereof is inserted into the locking hole 16 of the main body 11 and fixed, so that the axis 12a or 19
The rotational drive of the locking protrusion 17 and the polishing member 26 around a is prevented. Since the axis 19a of the bearing 20 is eccentric by the distance d1 with respect to the axis 12a of the drive shaft 12, the eccentric axis 19a is centered on the axis 12a of the drive shaft 12, and the eccentric axis 19a is centered on the axis 12a of the drive shaft 12.
It is rotated around the axis 12a of 2 with a radius d1.

Regarding the movement of the mounting body 13 described above, a line F passing through the axis of the locking protrusion 17, the axis of the insertion hole 29 of the support plate 23, and therefore the aforementioned eccentric axis 19a.
In the above, the distance P1 from the longitudinal tip point A of the mounting body 13 to the center of the insertion hole 29 and the insertion hole 2
By making the distance P2 from the center of 9 to the axis of the locking protrusion 17, which is the fulcrum, equal, the mounting body 1
3, the driving distance P3 of the tip A point of the bearing 20 is
The driving distance P4 of the axis can be doubled, and the range to be polished by the mounting body 13 can be widened.

Furthermore, the speed at which the tip A point of the mounting body 13 is driven is twice as fast as the speed at which the axis of the bearing 20 is driven, thus improving work efficiency.

In this case, the tip A of the attachment body 13, and therefore the locus of the polishing member 26, has its long axis perpendicular to the longitudinal direction of the attachment body 13, as shown by the two-dot chain line B in FIG. 4, for example. It may have a roughly elliptical shape such as this, or it may have a circular shape, and this is a locus that changes depending on the rotational speed of the drive source 40 and the frictional force of the polishing member 26 during polishing.

In this embodiment, when the mounting body 13 is driven, there is an obstacle 30 protruding from the surface to be polished, as shown in FIG. In some cases, near the tip A in the longitudinal direction of the mounting body 13, driving in the direction perpendicular to the longitudinal direction of the mounting body 13 (the left-right direction in FIG. 3) is restricted. Therefore, near the tip A of the mounting body 13,
Therefore, the movement of the polishing member 26 is as shown in FIG.
When the outer circumferential surface of the attachment body 13 is in contact with the obstacle 30, as shown by the dotted chain line C, the polishing device 10 is moved in the front-rear direction along the contact surface of the obstacle 30, that is, in FIGS. 4. It moves in the vertical direction in FIG. 2, and it becomes a substantially linear reciprocating movement in which lateral movement toward the obstacle 30 is prevented. As a result, the surface to be polished at the corner near the base end of the obstacle 30 can be sufficiently polished to every corner.

FIG. 5 is an exploded perspective view of a polishing apparatus 10a according to still another embodiment of the present invention. This embodiment is similar to each of the previously described embodiments, and corresponding parts are given the same reference numerals. In the embodiment described above, the locking hole 16
is adjacent to the center (left side in FIG. 1) of the mounting hole 14 in the longitudinal direction of the main body 11, but in this embodiment, the locking hole 16 is located in the longitudinal direction of the main body 11. It is adjacent to the outside (right side in FIG. 5) of the installation position of the mounting hole 14.

The mounting body 13 has a locking protrusion 17 at the longitudinal center of the mounting body 13 and on the support plate 23 side, and the locking protrusion 17 is partially inserted into the locking hole 16 and fixed to the main body 11. be done. An insertion hole 29 is provided near one longitudinal end of the mounting body 13 , and the mounting body 13 is screwed onto the bearing 20 with a bolt 22 . Even in the above configuration, the obstacle 30 that cannot be removed in the embodiment described above
Similarly, a reciprocating motion along the longitudinal direction of the mounting body 13 is obtained when the mounting body 13 is heated.

Effects As described above, according to the present invention, when the outer circumferential surface of the attachment body 13 near the polishing member 26 comes into contact with the obstacle 30, the outer circumference of the attachment body 13 touches the obstacle 30.
Since the outer circumferential surface of the mounting body 13 and therefore the polishing member 26 move back and forth along the obstacle 30 while in contact with the It is possible to do so.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a polishing device 10 according to an embodiment of the present invention, FIG. 2 is a diagram for explaining the operation of the mounting body 13, and FIG. 3 shows an obstacle 30 on the outer peripheral surface of the mounting body 13. FIG. 4 is a schematic diagram showing the locus of the tip A in the longitudinal direction of the attachment body 13 to which the polishing member 26 of the attachment body 13 is attached in FIGS. 2 and 3, and FIG. 5 is a diagram showing the present invention. FIG. 6, an exploded perspective view of another embodiment of the polishing apparatus, is a diagram showing a typical prior art. 10, 10a... Polishing device, 11... Main body, 1
2... Drive shaft, 13... Mounting body, 15... Rotation prevention means, 16... Locking hole, 17... Locking protrusion, 1
9... Mounting hole, 20... Bearing, 26... Polishing member, 40... Drive source.

Claims (1)

[Claims for Utility Model Registration] A main body 11 that is held by an operator; a drive source 40 that is provided on the main body 11 and has a drive shaft 12 and rotates the drive shaft 12; and an obstacle 30. a mounting body 13 having an outer peripheral surface to be brought into contact; and an eccentric axis interposed between the drive shaft 12 and the mounting body 13, parallel to the axis 12a of the drive shaft 12 and eccentric from the axis 12a of the drive shaft 12. means 100 for rotatably connecting the drive shaft 12 and the mounting body 13 to each other around the eccentric axis 19a; a polishing member 26 mounted on the mounting body 13 at a position offset from the eccentric axis 19a; and the axis 12a of the drive shaft 12. , one end is fixed to the main body 11, and the other end is fixed to the mounting body 13.
An elastic member 17 fixed to the drive shaft 12 and elastically deformed between the one end and the other end in response to displacement of an eccentric axis 19a with respect to the axis 12a of the drive shaft 12.