JPS60146664A - Plunger polishing equipment - Google Patents

Abstract

PURPOSE:To improve the surface roughness of the plunger of an installed elevator and increase the economical efficiency by pressing a polishing member, which is in contact with the outer surface of the plunger, with a support member and by moving the plunger to polish its surface. CONSTITUTION:In the state that a polishing paper 46 is held between a hydraulic plunger 20 and a rubber band 44, a support 38 is fixed to the upper part of the gland, and a bolt is inserted into a bolt hole 43 of a polishing equipment 24 for connecting a two-part polishing equipment. Then the pressing force of the plunger 20 against the polishing paper 46 is adjusted by the clamping force of the nut. Next, by driving the hydraulic unit while feeding polishing oil to the polishing equipment 24, the hydraulic oil is pressure-supplied into a hydraulic cylinder 14 to raise the plunger 20. When the plunger 20 goes up to the prescribed height, the hydraulic oil within the cylinder 14 is returned to the hydraulic unit; then the plunger 20 gradually goes down by the weight of its cage. In this way, by moving the plunger 20 up and down, the peripheral surface of the plunger 20 can be polished by the polishing by the polishing paper 46 to the degree of roughness in accordance with that of this polishing paper.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a hydraulically driven plunger polishing device, and more particularly to a Kl suitable plunger polishing device for polishing plungers of hydraulic elevators.

[Background of the invention]

The running performance of a hydraulic elevator includes elevator vibration and noise. Among these, the finish roughness of the outer surface of the plunger may be one of the causes of elevator vibration. In other words, the finish roughness of the outer surface of the plunger, in combination with the type of packing attached to the piston, the sliding resistance caused by the tightening force of the packing, and the sliding speed of the plunger, will affect the so-called chatter vibration in which the plunger vibrates minutely. may be given. This chatter vibration is a phenomenon that often occurs when the elevator is at a low landing speed, and when the chatter vibration resonates with the elevator's natural vibration, it causes the car to vibrate greatly, causing significant damage to the passengers inside the car. Gives a feeling of anxiety and discomfort.

For this reason, 1. Conventional methods for preventing chatter vibrations include adjusting the tightening force of the gaskets, replacing the gaskets, and increasing the roughness of the plunger surface when chatter vibrations begin to occur. .

This method of increasing the surface roughness has been carried out by replacing the plunger with a plunger having a higher surface roughness than the generally used plunger. Therefore, the maintenance cost of the elevator is not only very expensive, but also requires a lot of man-hours and time.

[Purpose of the invention]

An object of the present invention is to provide a plunger polishing device that can easily improve the surface roughness of the plunger of an installed elevator.

[Summary of the invention]

The present invention is constructed so that the surface of the plunger can be polished to a desired roughness by pressing the polishing member provided in contact with the circumferential surface of the plunger against the plunger by a supporting member and driving the plunger. Preferred embodiments of the plunger polishing device according to the present invention are as follows:
A detailed explanation will be provided according to the attached drawings.

FIG. 1 shows a plunger polishing device according to the present invention installed in a hydraulic elevator.

The hydraulic elevator 10 includes a hydraulic cylinder 1 in a bit 12.
4 is installed upright, and the hydraulic unit 1 is connected via an oil feed pipe 16.
8 allows hydraulic oil to be sent into the hydraulic cylinder 14. Further, the hydraulic cylinder 14 is provided with a hydraulic plunger 2o that moves up and down within the hydraulic cylinder 14. Gland part 2 provided at the top of the hydraulic cylinder 14
2 (in order to prevent the hydraulic oil in the hydraulic cylinder 14 from leaking, a polishing device 24 is installed on the top of this gland section 22).
is the installation.

A sheave 26 is fixed to the upper end of the hydraulic plunger 20. The rope 28 hung on the sheave 26 has buffer springs 30 and 32 attached to both ends. One spring 30 attached to the rope 28 is prevented from moving upward by a spring retainer 34 provided in the pit 12, and the other spring 32 is located at the bottom of the riding basket 36. .

The polishing device 24 is divided into two parts as will be described in detail later, and a housing 40 is welded to a support base 38 on a disk as shown in FIG. This housing 40 is
A cylindrical portion 42 is formed inside, and a bolt hole 43 is provided at the outer end. A rubber band 44 which is an elastic body is fitted into the cylindrical portion 42 , and an abrasive paper 46 provided on the inner peripheral surface of the rubber band 44 is in contact with the hydraulic plunger 22 .

Furthermore, a felt 47 for removing abrasion powder is attached to the inner circumferential surface of the support base 38 and is in contact with the circumferential surface of the hydraulic plunger 200.

The support stand 38 of the polishing device 24 has a stud bolt 50 and a nut 52 installed in the gland main body 48 of the gland section 22.
It is fixed in place. The packing retainer 54 through which the stud bolt 50 passes can be adjusted by adjusting the nut 56.
A plurality of gaskets 58 provided on the inner peripheral surface of the gland body 48
The tightening force can be adjusted. Further, a dust seal 60 is provided on the inner circumferential surface of the packing presser 54 to prevent dust from entering into the hydraulic cylinder 14. In addition, the ground portion 22#'i
, the gland body 48 is connected to the flange portion 6 of the hydraulic cylinder 14.
2 with bolts 64.

The polishing device 24 is divided into two parts as described above so that it can be easily attached and detached, and as shown in FIG. Bolt 66 and nut 6 inserted into bolt hole 43
8 so that they can be connected to each other. Note that the reference numeral 70#'i shown in FIG. 3 is a spring washer.

The operation of the embodiment configured as described above is as follows.

First, while the abrasive paper 46 is held between the hydraulic plunger 20 and the rubber band 44, the support base 38 is fixed to the upper part of the gland section 22 via the stud bolt 50 and nut 52. Thereafter, the bolt 66 is inserted into the bolt hole 43 provided in the housing 40 of the polishing device 24, and the two parts of the polishing device, which are divided into two parts, are collinearly connected to each other with the tin ring washer 70 and the nut 68. . The tightening of the nut 68 depends on adjusting the force, and the abrasive paper 4
6 to adjust the pressing force applied to the hydraulic plunger 20.

After that, while flowing polishing oil into the polishing device 24,
The hydraulic unit shown in the figure) 18 is driven to forcefully feed hydraulic oil into the hydraulic cylinder 14 through the oil feed pipe 16, and the hydraulic plunger 20 is raised. When the hydraulic plunger 20 rises to a predetermined height, the hydraulic oil in the hydraulic cylinder 14 is returned to the hydraulic unit 18 via the oil feed pipe 16, and the hydraulic plunger 20 is pushed downward by the weight of the car cage 36. is pushed down and gradually descends. When the hydraulic plunger 20 of the hydraulic elevator 10 is moved up and down in this manner, the abrasive paper 46 pressed onto the circumferential surface of the hydraulic plunger 200 polishes the circumferential surface of the hydraulic plunger 20 to a roughness corresponding to the roughness of the abrasive paper 46. do. At this time, the friction coefficient μ2 between the abrasive paper 46 and the rubber band 44 and the friction coefficient μ2 between the abrasive paper 46 and the hydraulic plunger 2o! Since it is larger, it remains supported by the rubber band 44. The abrasion powder generated on the abrasive paper 46 flows down along the circumferential surface of the hydraulic plunger 20 together with the abrasive oil, and is removed by the felt 47. When the polishing of the hydraulic plunger 20 is completed, the polishing device 22 may be removed from the gland portion 22, as shown in FIG. 4, or may remain attached.

As described above, according to this embodiment, the surface of the plunger of an installed elevator can be easily made to any desired surface roughness by vertically moving the plunger (including vertically moving the plunger during commercial operation of the elevator). Can be re-polished.

In the above embodiment, when polishing the plunger of an elevator that has already been installed,
L Eka 8, Eng 5. Oyuoyo□tech. 7. ,, It can also be applied to the polishing of r-jars. Further, in the above embodiment, the hydraulic plunger 20 of a hydraulic elevator has been described, but the present invention can also be applied to pushers other than elevators. Furthermore, although abrasive paper has been described as an abrasive member in the above embodiments, other abrasive members,
For example, a grindstone or the like may be used. Although the rubber band 44 has been described as a member that supports the abrasive paper 46, other members may be used instead of the rubber band 44 and pressed against the hydraulic plunger 20 by a spring. Further, in the above embodiment, the case where the abrasion powder is removed by the felt 47 has been described, but other materials such as rubber may be used instead of the felt 47. In the above embodiment, the case where the polishing device 24 is divided into two parts has been described, but it goes without saying that the polishing device 24 can be divided into three or more parts.

〔Effect of the invention〕

As explained above, according to the present invention, the surface of the plunger of an installed elevator can be improved to any desired surface roughness.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a polishing device according to the present invention installed in a hydraulic elevator, FIG. 2 is a sectional view of an embodiment of a plunger polishing device according to the present invention, and FIG. 3 is a diagram showing the - 4 is a cross-sectional view taken along the line (2) and shows the ground section with the polishing device removed. 10... Hydraulic elevator, 14... Hydraulic cylinder,
18... Hydraulic unit, 20... Hydraulic plunger,
22... Gland part, 24... Polishing device, 38...
- Support stand, 40... Housing, 44... Rubber band, 46... Abrasive paper, 47... Felt. Representative patent attorney Tatsuyuki Unuma also has two pictures.

Claims (1)

[Claims] 1. A polishing member provided in contact with the circumferential surface of a plunger driven by the pressure of a working fluid, and supporting this polishing member;
A plunger polishing device comprising a support member disposed around a plunger that presses a polishing member against the plunger. 2. The plunger polishing device according to claim 1, wherein the support member has an elastic body on its inner circumferential surface and supports the polishing member via the elastic body. . 3. The plunger polishing device according to claim 1 or 2, wherein the support member is attached to a ground portion provided in a cylinder in which the plunger moves forward and backward. 4. The support member supports an abrasion powder removal member that wipes off abrasion powder ground by the abrasive member, which is provided in contact with the plunger.
Plunger polishing device according to items 1 to 3.