JP2001071252A - Grinding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight grinding device with a simple mechanism, allowing wide-range and minute adjustment of the positional relation between a grinding disk and an operation roller. SOLUTION: In this grinding device, two vertical bearings 15 are provided at an interval on an axis parallel to the rotation shaft of a drive means 11 in front of the drive means 11, horizontal bearings 16 are provided on axes perpendicular to the rotation shaft on both sides of the drive means 11, a worm 19 is interposed between the vertical bearings 15 with gaps, a vertical shaft 23 fitted in a spring seat 21 and a spring 22 and provided with a knob 20 at the upper end is fitted into a center hole of the worm 19 and the vertical bearings 15, and the worm 19 and the vertical shaft 23 are fixed. Horizontal shafts 24 are rotatably fitted into the respective horizontal bearings 16, sector gears 25 are fitted on the respective horizontal shafts 24 and fixed such that the sector gears 25 mesh with the worm 19, rear extension parts of the horizontal shafts 24 are folded back to form roller shafts 27, and rollers 28 are rotatably fitted on the respective shafts 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing apparatus having a simple structure and capable of easily adjusting the pressing strength of a polishing disk.

[0002]

2. Description of the Related Art The present applicant discloses in Japanese Patent Application No. 59-11678 "a main body, a drive source incorporated in the main body, and a projection protruding outside one end of the main body and fixed to a rotating shaft of the drive source. ,
A polishing member driven to rotate around the rotation axis of the rotation shaft and having a polishing surface perpendicular to the rotation axis, and provided on both outer sides of the main body in plane symmetry with respect to a plane passing through the rotation axis, and perpendicular to the rotation axis. A pair of actuating members that are angularly displaceable about a suitable axis, and are capable of moving back and forth in parallel with the rotation axis with respect to the main body, and are provided at one end of the actuating member near the polishing member. A guide member extending in parallel, an adjusting piece provided at an end of the operating member on the side opposite to the polishing member, and a pair of legs are formed to substantially surround the main body so as to be substantially U-shaped. And the base of the leg is
An adjusting member provided on the main body at an offset relative to each displacement axis of the operating member so as to be capable of being displaced around an axis perpendicular to the rotation axis and perpendicular to each of the displacement axes of the operating member; and Each has a contact surface that is formed to protrude and is inclined toward the rotation axis as approaching the adjustment piece, and each contact surface adjusts the amount of angular displacement of the adjustment member and the contact protrusion that contacts the adjustment piece. And a fixing means for fixing to the main body.

[0003]

The polishing apparatus according to the above proposal has gained a good reputation from many customers and has been widely used. However, the structure is complicated, and an adjusting piece is provided on a contact surface having an inclined surface. Since the position of the guide member is adjusted by contact with the guide member, fine adjustment is difficult, and the operation for adjustment is complicated.

In view of the above-mentioned problems of the prior art, the present invention has a simple mechanism for reducing the weight, enabling fine adjustment of the pressing strength of the polishing disk, and adjusting the positional relationship between the operation roller and the polishing disk in a wide range. An object of the present invention is to provide a polishing apparatus that enables the polishing apparatus.

[0005]

According to the present invention, two vertical bearings are provided on a front surface of a driving means for rotating a polishing disk at intervals on an axis parallel to the rotation axis. A horizontal bearing is provided on both sides of the drive means on a shaft perpendicular to the rotation axis, a worm is fitted with a gap between the vertical bearings, and a spring is provided between the center hole of the worm and the vertical bearing. Fit the seat and spring, insert the vertical axis with the knob on the upper end, fix the worm and the vertical axis,
A horizontal shaft is rotatably fitted to the horizontal bearing, a sector gear is fitted to the horizontal shaft, meshed and fixed to the worm, and a rear extension of the horizontal shaft is turned back to form a roller shaft, and a roller is rotated on this shaft. It adopts a configuration fitted as possible.

In the present invention configured as described above,
By turning the knob, the sector gear meshed with the worm is activated, and the positions of the rollers on both sides are adjusted. As a result, it becomes an extremely simple mechanism, is lightweight, makes it easy to fine-tune the pressing strength of the polishing disc, makes it possible to adjust the positional relationship between the operation roller and the polishing disc over a wide range, and enables more precise polishing work This reduces the labor burden on the worker.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a polishing apparatus according to the present invention, and FIG. 2 is a front view of the same.

An air motor 11 which is a driving means of the polishing disk 10 has a grip 12 extending rearward thereof, an air supply valve operating lever 13 provided near the air motor 11 of the grip 12, and a rotating shaft 14 provided with the polishing disk 10. Is detachably attached. Although an air motor is used here, an electric motor may be used.

A frame 17 for supporting a vertical bearing 15 and a horizontal bearing 16 is attached to a lower portion of the air motor 11.

The vertical bearings 15 are provided one at a time at an interval above and below (see FIG. 2), and are slightly shorter than the interval (including the boss portion) and fitted with a worm 19 provided with a central shaft hole 18. A knob 20 is provided at the upper end of the vertical bearing 15 from above, and a vertical shaft 23 in which a spring seat 21 and a spring 22 are fitted is fitted, and the vertical shaft 23 and the worm 19 are screwed.

A horizontal shaft 24 is fitted into the horizontal bearings 16 provided on both sides of the air motor 11 so as to protrude forward from a shaft end 24 a, and a sector gear 25 is fitted into the protruding portion so as to mesh with the worm 19. Screwed.

The rear extension 24b of the horizontal shaft 24 is folded back to form a roller shaft 27 parallel to the horizontal shaft 24. A roller 28 is fitted on the roller shaft 27.

The roller shaft 27 has the same diameter as the inner race of the ball bearing 29 at a position corresponding to the length of the roller 28. The roller 28 is fitted via the ball bearing 29, and a snap ring is attached to the shaft end thereof. The roller 28 is prevented from slipping out by being fitted.

According to the polishing apparatus M constructed as described above, when the knob 20 of the vertical shaft 23 is turned to the left or right, the worm 19 rotates and the sector gear 25 moves to the horizontal shaft 2.
It rotates around 4. Sector gear 25 is horizontal axis 2
4, the rear extension 2 of the horizontal shaft 24
A roller 28 fitted on a roller shaft 27 formed by folding back 4b swings left and right as indicated by a dashed line so that the positional relationship with the polishing disk surface 10 can be adjusted.

At this time, the vertical bearing 15 and the worm 19
And a slight gap exists between them, and the worm 19 is constantly pulled up by the spring 22, that is, the roller 28 is urged downward.

The pressing strength of the polishing disk 10 is adjusted by turning the knob 20 counterclockwise when viewed from above, and becomes weaker by turning the knob clockwise.

When polishing a concave curved surface, the knob 20 is turned counterclockwise largely so that the position of the rollers 28 on both sides is retracted from the surface of the polishing disk 10, and conversely, when polishing a convex curved surface, the knob 20 is turned clockwise. The roller 28 is adjusted so that the rollers 28 on both sides come out ahead of the surface of the polishing disk 10 by turning largely in the direction.

In the actual polishing operation, the rollers 28
Is applied to the surface to be polished, the polishing disk 10 is in a slightly floating state. The polishing disk 10 is pushed down, and the polishing disk 10 is brought into contact with the surface to be polished to perform polishing. The polishing intensity is adjusted by rotating the knob 20 left and right.

As can be seen from the above description, when the surface to be polished is a flat surface, when it is a concave surface, or when it is a convex surface, the position adjustment of the roller is a large adjustment, and the adjustment of the polishing intensity is a fine adjustment. Thus, both adjustments can be performed by turning one knob.

[0020]

As described above, according to the present invention,
Extremely simple mechanism and light weight, large and fine position adjustment of the rollers on both sides can be performed with the same operation, reducing the labor burden of the operator and more precise polishing work Is what makes it possible.

[Brief description of the drawings]

FIG. 1 is a perspective view of a polishing apparatus according to the present invention.

FIG. 2 is a front view of the same.

[Explanation of symbols]

 Reference Signs List 10 polishing disc 11 air motor 12 grip 13 air supply valve operation lever 14 rotation shaft 15 vertical bearing 16 horizontal bearing 17 frame 18 center shaft hole 19 worm 20 knob 21 spring seat 22 spring 23 vertical shaft 24 horizontal shaft 24a shaft end of horizontal shaft 24b Horizontal shaft rear extension 25 Sector gear 26 Fold back 27 Roller shaft 28 Roller 29 Ball bearing 30 Snap ring

Claims (1)

[Claims] 1. A vertical drive means for rotating a polishing disk is provided with two vertical bearings spaced apart from each other on an axis parallel to its axis of rotation, on both sides of the drive means at right angles to the axis of rotation. A horizontal bearing is provided on the main shaft, a worm is fitted with a gap between the vertical bearings, a spring seat and a spring are fitted over the center hole of the worm and the vertical bearing, and a vertical shaft provided with a knob at the upper end is fitted. Insert and fix the worm and vertical axis,
A horizontal shaft is rotatably fitted to the horizontal bearing, a sector gear is fitted to the horizontal shaft, meshed and fixed to the worm, and a rear extension of the horizontal shaft is turned back to form a roller shaft, and a roller is rotated on this shaft. Polishing device fitted as possible.