JP2001179591A - Orbital sander - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability of a grinding operation and to realize a beautiful finished surface using one orbital sander. SOLUTION: A screw 6 for adjusting an eccentric amount is provided in the connection part between a balancer 3 and an eccentric shaft 9. An eccentric amount a is increased for raising efficiency of the grinding operation, and an eccentric amount a is decreased for providing the beautiful finished surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an orbital sander for grinding wood and the like.

[0002]

2. Description of the Related Art A conventional orbital sander is shown in FIG. In the conventional orbital sander, the eccentricity a is fixed because the motor shaft 1 and the eccentric shaft 9 provided on the balancer 3 are integrally formed.

For this reason, the operator has adjusted the amount of grinding and the finished surface only by changing the particle size of the abrasive paper 12.

[0004]

The conventional orbital sander has the advantage that when the eccentricity a is large, the grinding amount is large and the working efficiency is good, but the disadvantage that the trajectory of the abrasive paper remains on the finished surface. On the contrary, when the eccentricity a is small, the finished surface is clean, but the working efficiency is poor.

An object of the present invention is to make it possible to freely adjust the amount of eccentricity, thereby improving work efficiency and obtaining a beautiful finished surface.

[0006]

The object of the present invention is to make the balancer and the eccentric shaft separate parts, and to connect the balancer and the eccentric shaft.
This is achieved by using a screw for the purpose of adjusting the amount of eccentricity.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS.
This will be described below with reference to FIG.

FIG. 1 shows an orbital sander of the present invention.
FIG. 2 is a sectional view taken along line AA of FIG.

[0009] The orbital sander of the present invention comprises a motor shaft 1
The balancer 3 having the weight 8 and the balancer 3 is connected by the screw portion 2, and the balancer 3 and the eccentric shaft 9, which is a separate component, are connected by the screw 6 for adjusting the amount of eccentricity a. The screw 6 has a structure that does not come out of the balancer 3 by the C clip 7.

The rotational movement of the motor shaft 1 is transmitted to an eccentric shaft 9 via a screw 6 inserted into the balancer 3, and the eccentric shaft 9
Of the pad 11 via the ball bearing 10
The pad 11 itself makes a revolving motion, and performs a grinding motion with the abrasive paper 12 held below the pad 11.

A method of adjusting the eccentricity a in the orbital sander will be described below.

First, the driver 15 is inserted through the screw head position adjusting hole 13 and the balancer 3 is rotated to adjust the position of the screw head 5 to the direction of the hexagon wrench insertion hole 14. Next, a hexagonal wrench 16 is inserted through the hexagonal wrench insertion hole 14, and the hexagonal wrench 16 is inserted into the screw head 5. When the hexagon stick wrench 16 is rotated in this state, the screw 6 is rotated, so that the eccentric shaft 9 moves left and right on the paper surface, and the eccentricity a can be adjusted (FIG. 3).

When it is desired to increase the grinding efficiency, the screw 6 is rotated so as to increase the amount of eccentricity a, and the eccentric shaft 9 is moved rightward in the figure (FIG. 4). To make the finished surface more beautiful, the screw 6 is rotated so that the amount of eccentricity a becomes smaller, and the eccentric shaft 9 is moved to the left in the figure (FIG. 5).

[0014]

According to the present invention, by using a mechanism for connecting the balancer and the eccentric shaft by using a screw and adjusting the amount of eccentricity freely, it is possible to obtain both improved working efficiency and a beautiful finished surface. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of an orbital sander of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an explanatory partial cross-sectional side view showing an eccentricity adjustment method.

FIG. 4 is an explanatory cross-sectional view showing a case where the amount of eccentricity is large.

FIG. 5 is an explanatory cross-sectional view showing a case where the amount of eccentricity is small.

FIG. 6 is a partially sectional side view showing an example of a conventional orbital sander.

[Explanation of symbols]

1 is a motor shaft, 2 is a screw part, 3 is a balancer, 4 is a stopper, 5 screw heads, 6 is a screw, 7 is a C clip, 8 is a weight, 9 is an eccentric shaft, 10 is a ball bearing, 11 is a pad, 12 is abrasive paper, 13 is a screw head position adjustment hole, 1
4 is a hexagon wrench insertion hole, 15 is a driver, and 16 is a hexagon wrench.

Claims (1)

[Claims] A rotary motion of a motor shaft is transmitted to a balancer having a weight and an eccentric shaft formed eccentrically with respect to the motor shaft, and the orbital motion of the eccentric shaft is transmitted to the pad to revolve the pad itself. An orbital sander that performs a motion and performs a grinding operation with polishing paper held at a lower part of a pad, wherein the balancer and the eccentric shaft are separate parts, a screw is used for coupling the balancer and the eccentric shaft, and an eccentric shaft with respect to the motor shaft. An orbital sander characterized in that the amount of eccentricity can be adjusted with a screw.