JPH0881155A - Main rope length adjusting device of hydraulic elevator - Google Patents

Abstract

PURPOSE: To provide the main rope length adjusting device of a hydraulic elevator, capable of easily adjusting the main rope length dispensing with any large- scale device such as a hydraulic unit. CONSTITUTION: The main rope length adjusting device of a hydraulic elevator is constituted of a gripping part 11 for gripping the socket part 4b of a thimble rod 4 for connecting one end of a main rope 5 to a jack stand 3, a chain block 12 for pulling the thimble rod 4 in the direction of the jack stand 3 through this gripping part 11, and a wire rope 13 to be laid around the jack stand 3. The gripping par 11 is composed of divided bodies 21, 22 for gripping the socket parts 4b, connecting tools 23 for connecting the divided bodies 21, 22 to each other, and hook parts 24 on which one end of the chain block 12 is to be locked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main rope length adjusting device for a hydraulic elevator.

[0002]

2. Description of the Related Art FIG. 4 is a sectional view showing the overall structure of a general hydraulic elevator. The hydraulic elevator shown in FIG. 4 has a hydraulic jack 1 that expands and contracts by hydraulic drive, a pulley 2 rotatably attached to the upper end of the hydraulic jack 1, a jack stand 3 that supports the hydraulic jack 1, and thimble rods at both ends. 4, a plurality of main ropes 5 having an intermediate portion wound around the pulley 2, a car 6 driven via the main ropes 5, and a guide rail 7 for guiding the car 6 in the vertical direction. An emergency stop device 8 for stopping the car 6 in an emergency and a safety device 9 for detecting an overstroke state of the jack 1. Further, the thimble rod 4 described above is provided on the jack base 3 (that is, the fixed body) and the lower portion of the car 6 and rods 4a that are respectively inserted into the lower portion of the cage 6,
The socket 4b attached to the end of the main rope 5, the nut 4c screwed to the lower end of the rod 4a, and the pressing spring 4 inserted into the rod 4a and having one end pressed by the nut 4c.
It consists of d and.

In the hydraulic elevator constructed as described above, when the hydraulic jack 1 is extended by hydraulic drive, the pulley 2 is raised and the intermediate portion of the main rope 5 is pushed up.
The car 6 connected to the free end of the main rope 5 is lifted, and as a result, the car 6 rises along the guide rail 7. After that, when the hydraulic jack 1 is contracted, the car 6 descends along the guide rail 7 as the pulley 2 descends. Further, in case of an emergency such as when the car 6 is dropped, the emergency stop device 8 operates to engage with the guide rail 7 and stop the car 6.

Further, in such a hydraulic elevator, since the load of the car 6 is always applied to the main rope 5,
After the installation of the hydraulic elevator, the phenomenon that the main rope 5 extends tends to occur. Since the car 6 is corrected so as to be stopped at a predetermined position as the main rope 5 extends, the hydraulic jack 1
The stroke of is longer than usual.
However, if the amount of extension of the main rope 5 exceeds a certain limit, the stroke limit of the hydraulic jack 1 is exceeded, and for example, there is a problem that the car 6 cannot be stopped at a predetermined position on the top floor. Therefore, the overstroke state of the hydraulic jack 1 is detected by the safety device 9, and the length of the main rope 5 is adjusted when the safety device 9 operates.

Conventionally, when adjusting the length of the main ropes 5, a plurality of main ropes 5 are divided into at least two groups, and a main rope hydraulic traction device (not shown) is first connected to the thimble rod 4 of one group. After that, the apparent length of the one main rope 5 is made shorter than the length of the other main rope 5 by the operation of the main rope hydraulic traction device. As a result, the car 6 is supported by the one main rope 5, the tension of the other main rope 5 disappears and the pressing spring 4d becomes loose, so that the length of the other main rope 5 is adjusted. Next, the main rope hydraulic traction device is detached from the main rope 5 of one group and connected to the thimble rod 4 of the other group, and the car 6 is supported by the other main rope 5 in the same manner as the above procedure. Then, while the one main rope 5 is loose, the length of the one main rope 5 is adjusted.

As a conventional technique related to adjusting the length of the main rope of this type of hydraulic elevator, there is, for example, the one described in Japanese Patent Application No. 5-5036.

[0007]

By the way, in the above-mentioned prior art, when the length of the main rope 5 is adjusted, the main rope hydraulic traction device is used. Therefore, a large-scale device such as a hydraulic unit is installed in the hoistway pit. There was a problem that it was necessary to bring it in, which required complicated work. Further, since the main ropes 5 are divided into at least two groups and are adjusted alternately, it is necessary to perform the adjustment work at least twice.

The present invention has been made in view of the actual situation in the prior art, and an object thereof is to easily adjust the length of the main rope without requiring a large-scale device such as a hydraulic unit. An object of the present invention is to provide a main rope length adjusting device for a hydraulic elevator.

[0009]

In order to achieve this object, the present invention provides a pulley rotatably mounted on the upper end of the invention.
A hydraulic jack that expands and contracts by hydraulic drive, a plurality of main ropes wound around the pulleys, a socket part attached to the main ropes, and a cushioning spring for cushioning are provided. In a main rope length adjusting device for a hydraulic elevator having a thimble rod provided in, a configuration is provided in which a pulling means for pulling the socket portion of the thimble rod in one direction of the car and the fixed body is provided. There is.

[0010]

Since the present invention is constructed as described above, for example, when the thimble rod provided in the car is pulled in the direction of the car by the pulling means, a load is applied to the push spring provided at one end of the thimble rod. Since the state in which is applied is released, the main rope length is adjusted in this state.
With this, the length of the main rope can be easily adjusted without requiring a large-scale device such as a hydraulic unit. Further, since the length of the main rope connected to the thimble rod pulled by the pulling means can be adjusted in this state, it is necessary to divide a plurality of main ropes into two or more groups and perform the adjustment alternately. Therefore, the length of the main rope can be adjusted quickly.

[0011]

Embodiments of the main rope length adjusting device for a hydraulic elevator according to the present invention will be described below with reference to the drawings. 1 is a front view showing an embodiment including the invention according to claims 1, 2, and 3 of a main rope length adjusting device for a hydraulic elevator according to the present invention,
2 is a front view showing a state where the main rope length adjusting device of FIG. 1 adjusts the main rope length on the car side, and FIG. 3 is a perspective view of a grip portion provided in the main rope length adjusting device of FIG. Is. 1 and 2, the same components as those shown in FIG. 4 described above are designated by the same reference numerals. That is, 1 is a hydraulic jack, 3 is a jack stand, 4 is a thimble rod, 4a is a rod, 4b is a socket portion, 4c is a nut, 4d is a pressing spring, 5 is a main rope, and 6 is a car.

The main rope length adjusting device of the present embodiment shown in FIG. 1 has a grip portion 11 for gripping the socket portion 4b of the thimble rod 4 mounted on the jack base 3, and the grip portion 1.
It is composed of a pulling means for pulling the thimble rod 4 toward the jack stand 3 via 1, for example, a chain block 12, and a wire rope 13 connected to the chain stand 12 and wound around the jack stand 3. As shown in FIG. 3, the grip portion 11 described above includes a pair of divided bodies 21 and 22 having a conical hole 20, and the divided bodies 21 and 22.
Pair of connecting tools 23 for connecting the chain block 12
And a pair of hooks 24, one end of which is locked. Since the inner peripheral shape of the hole 20 corresponds to the outer peripheral shape of the socket portion 4b, the socket portion 4b is gripped by the grip portion 11 in a state where the socket portion 4b is inserted into the hole 20. .

In this embodiment, as shown in FIG. 1, when the length of the main rope 5 is adjusted on the side of the jack stand 3, first, at least one of the plurality of main ropes 5 is selected, The grip portion 11 is attached to the socket portion 4b of the one main rope 5. At the time of this attachment, the connector 23 is removed to divide the divided bodies 21 and 22, and the socket portion 4b is inserted into the hole 20, and then the divided bodies 21 and 22 are combined to form the divided bodies 21 and 22 by the connector 23. To connect. Next, one end of the chain block 12 is locked to the hook portion 24 of the grip portion 11 and the wire rope 13 wound around the jack base 3 is wound.
The other end of the chain block 12 is connected to. Then, by operating the chain block 12, the socket portion 4b is pulled toward the jack base 3, and as a result, a load is applied to the pressing spring 4d and the nut 4c at one end of the thimble rod 4. Because it will be canceled
By rotating the nut 4c in this state, a gap L is formed between the jack base 3 and the pressing spring 4d.
In this way, the lengths of all the main ropes 5 are adjusted, the chain block 12 is loosened, and it is confirmed that there is no abnormality in the mounting state of the main ropes 5, then the grip portion 11, the chain block 12, and the wire rope 13 The car 6 is removed, and the car 6 is returned to the normal state where it can be raised and lowered.

Further, as shown in FIG. 2, the length of the main rope 5 is adjusted on the side of the car 6 by the same procedure.

In the embodiment configured as described above, the main rope 5 can be easily installed without using a large-scale device such as a hydraulic unit.
The length of can be adjusted. Further, since the length of the main rope 5 connected to the thimble rod 4 pulled by the chain block 12 can be adjusted in this state, a plurality of main ropes 5 are divided into two or more groups and alternately adjusted. Therefore, the length of the main rope 5 can be quickly adjusted.

[0016]

Since the present invention is configured as described above, it is possible to easily adjust the length of the main rope without having to carry a large-scale device such as a hydraulic unit into the pit. Therefore, only one worker is required to perform the main rope length adjustment work, and the labor cost can be saved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment including the invention according to claims 1, 2, and 3 of a main rope length adjusting device for a hydraulic elevator according to the present invention.

FIG. 2 is a front view showing a state where the main rope length is adjusted on the car side by the main rope length adjusting device of FIG.

3 is a perspective view of a grip portion provided in the main rope length adjusting device of FIG. 1. FIG.

FIG. 4 is a cross-sectional view showing the overall configuration of a general hydraulic elevator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 hydraulic jack 3 jack stand (fixed body) 4 thimble rod 4b socket part 4d push spring 5 main rope 6 car basket 11 gripping part 12 chain block (pulling means) 21, 22 split body 23 connecting tool 24 hook part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Kubota 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Inside Hitachi Building System Service Co., Ltd.

Claims (3)

[Claims] 1. A pulley is rotatably attached to an upper end,
A hydraulic jack that expands and contracts by hydraulic drive, a plurality of main ropes wound around the pulleys, a socket part attached to the main ropes, and a cushioning spring for cushioning are provided. In the main rope length adjusting device for a hydraulic elevator having a thimble rod provided in, a pulling means for pulling the socket portion of the thimble rod in one direction of the car and the fixed body is provided. The main rope length adjusting device for the characteristic hydraulic elevator. 2. A gripping portion for gripping the socket portion of the thimble rod, and the pulling means comprises a chain block provided between the gripping portion and one of the car and the fixed body. The main rope length adjusting device of the hydraulic elevator according to claim 1. 3. The grip portion is composed of a plurality of divided bodies for holding the socket portion of the thimble rod, a connecting body for connecting the divided bodies, and a hook portion to which one end of the chain block is locked. The main rope length adjusting device for a hydraulic elevator according to claim 2.