JPH1128671A - Plunger polishing device of hydraulic elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow to carry out the polishing process work in order to remove an abrasion and a damage of a plunger sliding surface, without using a motive power and a manual work, safely, efficiently, automatically, and easily. SOLUTION: At the inner peripheral surface of a main body having a hollow part, a rotary roller 21 is set by inclining the shaft, and an abrasive part 19 is also set there, and a plunger is polished by squeezing the abrasive part 19 to the plunger while rotating the device by the working of the rotary roller 21. As the polishing member 19, an abrasive extending plate 17 formed by a flexible material such as a plastic, on which an abrasive cloth or paper is stuck, or a polishing plate integrating an abrasive, is used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plunger polishing apparatus for removing wear and scratches on a sliding surface of a plunger of a hydraulic elevator by polishing.

[0002]

2. Description of the Related Art FIG. 9 is a view showing an example of a method of polishing a sliding surface of a plunger in a hydraulic elevator generally used in the related art. A plunger 2 is removably inserted into the cylinder of the jack 1. A sheave 3 is attached to the top of the plunger 2, and one side of the sheave 3 is fixed to the bottom of the jack 1 and the other is fixed to the lower part of a car 4 on which a person rides. Is held by a wire rope 5 for holding the wire.

When the wear or scratches on the sliding surface of the plunger are removed by polishing, an operator 7 rides on the upper fixing bracket 6 of the jack 1 and winds a long sandpaper 8 around the plunger 1 at least one turn. The part is alternately pulled and polished. In order to change the polishing position of the plunger 2, another operator 9 riding on the car 4 performs an operation of changing the position of the plunger.

[0004]

The plunger polishing by the plunger polishing apparatus of the conventional hydraulic elevator having the above-described structure depends on humans, is difficult to perform, and can stably and uniformly process. There was a problem that it was difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is possible to efficiently and automatically perform a polishing work for removing abrasion and scratches on a sliding surface of a plunger without requiring power or manpower. It is an object of the present invention to obtain a plunger polishing apparatus for a hydraulic elevator that can be easily and easily performed.

[0006]

SUMMARY OF THE INVENTION A plunger polishing apparatus for a hydraulic elevator according to the present invention comprises a main body having a hollow portion which can be fitted to a plunger and a rotary roller having a shaft inclined to an inner peripheral surface of the hollow portion. Is installed, and an abrasive part for polishing the plunger is installed on the inner peripheral surface of the hollow part, and by pressing the abrasive part against the plunger while the apparatus is rotated by the action of the rotating roller, polishing is performed. In addition, uniform polishing of the sliding surface of the plunger can be stably performed.

[0007] The abrasive portion is formed by attaching abrasive cloth to an abrasive pressing plate made of a flexible material such as plastic or the like, so that the abrasive portion is easily adapted to the sliding surface of the plunger.

Further, the abrasive portion is a polishing plate in which the abrasive is integrated so that the polishing operation can be stably performed for a long period of time.

A main body having a hollow portion is formed by dividing the main body into two parts. One end of the main body formed by dividing the main body is joined by a hinge, and the other end is formed to be fixable by a fastener. This improves the workability of mounting the device.

[0010] Still further, the tilt angle of the axis of the rotating roller can be set to an opposite angle so that the rotating direction of the apparatus can be reversed to obtain crossed polishing lines.

In addition, a through-hole having a thread is provided at the bottom of the cylindrical hole for mounting the roller support of the main body, and a spring and an adjusting screw are provided in the through-hole to adjust the pressing force of the rotary roller. This prevents rotation failure of the device.

Further, by providing a felt band portion below the inner peripheral surface of the hollow portion, shavings are removed, and
It absorbs oil adhering to the plunger, prevents slippage of the rotating roller, and improves rotation of the plunger polishing device.

Further, by providing a bearing roller on the lower surface of the main body, the plunger polishing device smoothly rotates on the packing holder.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. 1 to 5 show a first embodiment of the present invention.
FIG. 1 is an overall configuration diagram before mounting, and FIG. 2 is a diagram in which the polishing device shown in FIG. 1 is mounted on a plunger of a jack.

As shown in FIG. 2, a packing holder 10 for holding a packing (not shown) is fixed to the upper end of the jack 1 with a plurality of bolt screws 10a. The plunger polishing apparatus 11 according to the first embodiment of the present invention includes a hollow portion 11a that can be fitted to the plunger 2.
The main body 11A and the main body 11A, which are formed by dividing the hollow cylindrical main body 11 into two parts, are connected by a hinge 12, and the main body 11A and the main body 11B are formed so as to be openable and closable with this part as a fulcrum. A hook 13 is attached to a side end surface of the main body 11A opposite to a portion where the hinge 12 is attached. Further, a hook 13 is provided at a side end of the main body 11B opposite to a portion to which the hinge 12 is attached.
In addition, a latch 14 serving as a fastener is attached. When the present polishing apparatus is used, the latch 14 is removed, the main body 11A, 11B is rotated around the hinge 12 and spread, and then the plunger 2 is surrounded on the packing holder 10, and the latch 14 is hooked on the hook 13. Attach.

A main body 11A of the plunger polishing device 11,
A plurality of bearing rollers 15 are attached to the lower surface of 11B. An abrasive pressing plate 17 constantly pressed toward the center by a coil spring 16 is attached to an upper portion of the plunger polishing device 11 so that the plunger polishing device 11 can be smoothly moved on a horizontal surface 18. ing. Abrasive cloth paper, that is, sandpaper 19 is attached to the abrasive pressing plate 17. A lid 20 is provided on the upper surfaces of the main bodies 11A and 11B.

A rubber roller 21 as a rotating roller is attached to the inner surface of the plunger polishing device 11 with its axis inclined at about 45 degrees from a horizontal position. The rubber roller 21 is fixed to a roller support 22, as shown in FIG. The roller support 22 is provided with a shaft 23 so as to be rotatable in a cylindrical hole 24 of the main body 11A.

As shown in FIG. 5, the roller support 22 has a coil spring 25 on the shaft end of the rubber roller 21.
A fixed ball 26 constantly pressed is provided, and normally engages with a groove 27 provided in the main body 11A, and the cylindrical hole 2
4 so as to maintain a fixed position. A pair of grooves 27 is provided on a diagonal line inclined at about 45 degrees from the horizontal position, and another pair is provided at a position forming an angle of 90 degrees when viewed from the direction of the cylindrical hole 24. A belt-like felt 28 is embedded at the lower end of the inner peripheral surface of the plunger polishing device 11.

When the plunger polishing device 11 is mounted on the packing holder 10, the sandpaper 19, the rubber roller 21 and the felt 28 are all attached to the plunger 2.
Is pressed against the outer peripheral surface. In addition, the plunger polishing device 11 is mounted on the packing holder 10 via the bearing roller 15 and rotated by its own weight.

When the plunger 2 is moved in the direction of lifting from the jack 1, the plunger polishing device 11 remains on the packing retainer 10 by its own weight. At this time, the plunger polishing device 11 rotates counterclockwise as viewed from above along the sliding surface of the plunger 2 due to the effect of the mounting angle of the rubber roller 21. The plunger polishing device 11 smoothly rotates on the packing holder 10 by the function of the bearing roller 15. Due to this rotation, as shown in FIG. 6, a scratch 29 of the sandpaper 19 is obliquely formed on the sliding surface of the plunger 2.

When the plunger 2 is moved in the direction of pressing down on the jack 1, the plunger polishing device 11 is pressed and retained by the packing retainer 10. At this time, the plunger polisher 11 rotates clockwise when the sliding surface of the plunger 2 is viewed from above due to the mounting angle of the rubber roller 21, so that the scratch 29 is formed.

When the roller support 22 is rotated by 90 degrees by hand, the fixed ball 26 is fitted into another groove 27, and the same operation is performed.
The polishing apparatus is rotated in the opposite direction, and has a scratch 3 having a different orientation.
0 will be added. Felt 28 is rubber roller 21
Is to absorb oil adhering to the sliding surface of the plunger 2 and prevent it from slipping.

As described above, according to the first embodiment of the present invention, the rubber roller 21 is provided on the inner peripheral surface of the plunger polishing device 11 with its shaft 23 inclined, so that power can be externally supplied. Without supply, the plunger polishing apparatus 11 automatically rotates, and a uniform and stable plunger polishing operation can be performed. In addition, since it has a simple structure that does not use a power source such as an electric motor, it is possible to realize a small-sized one whose external size does not become larger than the packing retainer 10, and can be freely mounted.

Embodiment 2 FIG. Note that the abrasive pressing plate 17 in the first embodiment can be formed of a plastic material having a slight bending. Accordingly, the same effect as that of the first embodiment can be obtained, and the bending of the abrasive pressing plate 17 makes it easy for the sandpaper 19 to conform to the sliding surface of the plunger 2, and the sliding surface of the plunger 2. Polishing can be performed more uniformly and stably.

Embodiment 3 FIG. 7 shows the abrasive pressing plate 17 and the sandpaper 19 in the embodiment shown in FIG.
Are integrated into a polishing plate 31 containing an abrasive. Even if the polishing plate 31 is worn by performing the polishing operation of the long plunger 2, the coil spring 16 pushes the polishing plate 31 to keep a good polishing state at all times.

According to the present embodiment, since the polishing plate itself is used as the polishing material, the polishing operation can be stably performed for a long period of time without replacing the sand paper 19. Further, even in the case of a long plunger, it is not necessary to remove the plunger polishing device 11 and replace the sandpaper 19, so that the operation time can be shortened and the operation efficiency can be improved.

Embodiment 4 Also, as shown in FIG.
A thin cylindrical hole 32 penetrating from the bottom of the cylindrical hole 24 of the main body 11A shown in FIG.
A plunger-shaped shaft 33 may be provided outside of the shaft 2 to extend and slide and rotate in the through-hole 32. A screw thread 34 is provided near the outside of the through-hole 32, and an adjusting screw 35 is screwed therein. A coil spring 3 is provided between the adjusting screw 35 and the shaft 33 of the roller support 22.
6 has a function of pressing the rubber roller 21 against the plunger 2 via the roller support 22. The end face of the shaft 33 is provided with a minus cutout.

By turning the adjusting screw 35, the length of the coil spring 36 changes, and the pressing force of the rubber roller 21 can be adjusted. Turn the adjusting screw 35 to remove it, take out the coil spring 36, and then use a flathead screwdriver from the outside of the through-bore 32 to support the roller support 22.
Is rotated, the direction of the rubber roller 21 can be changed.

According to the structure of the present embodiment, by moving the plunger 2 in the axial direction, the force for rotating the plunger polishing device 11 is obtained by the inclination of the shaft of the rubber roller 21 and the pressing force. The adjustment of the pressing force can be easily performed by adjusting the adjusting screw 35. Further, the angle of the rubber roller 21 is changed by the plunger polishing device 11.
Can be removed from the plunger 2, so that the working efficiency can be improved.

[0030]

The present invention is configured as described above, and has the following effects.

1) Since the rotating roller is provided on the inner peripheral surface of the plunger polishing apparatus main body with its axis inclined, the apparatus automatically rotates without requiring external power supply, and the plunger is rotated. The grinding operation of the sliding surface can be stably performed. In addition, a simple structure without using an electric motor or the like can be achieved, and the size of the device can be reduced and mounting can be facilitated.

2) By forming the abrasive pressing plate from a flexible material such as plastic having a slight bending, the polishing cloth can be easily adapted to the sliding surface of the plunger due to the bending of the abrasive pressing plate. As a result, the sliding surface of the plunger can be polished more uniformly and stably.

3) By using the abrasive pressing plate itself as the abrasive, there is no need to remove the plunger polishing device and replace the abrasive cloth, and the polishing operation can be stably performed for a long period of time. Time can be shortened and efficiency can be improved.

4) Since the main body having the hollow portion is divided into two parts and is formed so as to be fixed by hinges and fasteners, the workability of mounting the polishing apparatus can be improved.

5) By forming the inclination angle of the axis of the rotating roller so as to be able to be set to an opposite angle, the rotating direction of the apparatus can be reversed, and a high quality interpolated grain can be obtained.

6) A through-hole having a thread is provided at the bottom of the cylindrical hole for mounting the roller support, a spring and an adjusting screw are provided in the through-hole, and the pressing force of the rotary roller is adjusted. In addition, it is possible to prevent poor rotation of the apparatus, easily change the angle of the rotating roller, and improve the working efficiency.

7) By providing a felt band portion at the lower portion of the inner peripheral surface of the hollow portion, shavings are removed, oil adhering to the plunger is absorbed, slipping of the rotating roller is prevented, and plunger polishing is performed. The apparatus can be reliably rotated, and a uniform and stable polishing operation can be performed.

8) Since the bearing roller is provided on the lower surface of the main body, the plunger polishing device smoothly rotates on the packing holder, and a uniform and stable polishing operation can be performed.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a plunger polishing apparatus for a hydraulic elevator showing a first embodiment of the present invention.

FIG. 2 is a view showing a state in which the polishing apparatus of FIG. 1 is attached to a plunger of a jack.

FIG. 3 is a perspective view of one side portion of a main body of the polishing apparatus.

FIG. 4 is a sectional view taken along the line AA of FIG.

FIG. 5 is a view of B near the rubber roller and roller support of FIG. 4;
It is B sectional drawing.

FIG. 6 is a diagram showing an example of a processing flaw formed on a plunger surface by the plunger polishing apparatus of the present invention.

FIG. 7 is a sectional view of a main part of a plunger polishing apparatus according to a third embodiment of the present invention.

FIG. 8 is a cross-sectional view of a main part of a plunger polishing apparatus according to a fourth embodiment of the present invention.

FIG. 9 is a view showing an example of a method of polishing a plunger sliding surface of a hydraulic elevator, which is conventionally generally used.

[Explanation of symbols]

Reference Signs List 1 jack, 2 plunger, 3 sheave, 4 basket, 5 wire rope, 6 bracket, 7 worker, 8 sandpaper, 9 worker, 10 packing holder, 11 polishing device, 11A, 11B main body, 12
Hinge, 13 hook, 14 latch, 15 bearing roller, 16 coil spring, 17 abrasive pressing plate, 18 horizontal surface, 19 sandpaper, 20
Lid, 21 rubber roller, 22 roller support, 23
Shaft, 24 cylinder hole, 25 coil spring, 26 fixed ball, 27 groove, 28 felt, 29 scratch, 30
Scratches, 31 polishing plate, 32 through-hole, 33 shaft, 34
Screw thread, 35 adjusting screw, 36 coil spring

Claims (4)

[Claims] 1. A body having a hollow portion that can be fitted to a plunger, a rotating roller installed with an axis inclined on the inner peripheral surface of the hollow portion, and a plunger installed on the inner peripheral surface of the hollow portion. A plunger polishing apparatus for a hydraulic elevator, comprising: an abrasive portion to be polished; and means for pressing the abrasive portion against a plunger. 2. A main body having a hollow portion is formed by dividing the main body into two parts, one end of the main body formed by dividing the two parts is joined by a hinge, and the other end is formed to be fixable by a fastener. Item 2. A plunger polishing apparatus for a hydraulic elevator according to Item 1. 3. A plunger polishing apparatus for a hydraulic elevator according to claim 1, wherein the inclination angle of the shaft of the rotary roller is set to be an opposite angle. 4. A through-hole having a thread is provided at the bottom of a cylindrical hole for mounting the roller support of the main body, and a spring and an adjusting screw are inserted into the through-hole to adjust the pressing force of the rotary roller. 4. A plunger polishing apparatus for a hydraulic elevator according to claim 1, wherein the plunger polishing is performed by an adjusting screw.