JPH09295776A - Device for adjusting main rope tension of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit easy compensation work for a main rope elongation by employing a first shaft member having a first thread section, a second shaft member having an opposite thread section relative to that of the first shaft member, and a turnbuckle part for thread engagement with the first and the second shaft members. SOLUTION: A tension adjustment device 14 for a rope comprises a first and a second shaft members 14a and 14b, a turnbuckle member 14c, and a member 14d for engaging with a support member 3. First, one end of the first shaft member 14a is inserted in a hole formed in a socket 7 so as to be supported with the socket 7. Next, the member 14d to which one end of the second shaft member 14b is attached is made to engage with the support member 3. Female threads 141c, 142c formed in the turnbuckle member 14c engage with a first and a second thread sections 141a, 141b formed on the other ends of the first and the second shaft members 14a, 14b. When the tension adjustment device 14 is set up, the turnbuckle 14c is turned. This permits easy compensation work for a main rope elongation.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a tension adjusting device for an elevator main rope.

[0002]

2. Description of the Related Art Generally, an elevator car is connected to a main rope, and a driving force is transmitted by the main rope to move up and down in a hoistway.

Then, the main rope is stretched when tension is applied by raising and lowering the car.

When this elongation occurs, it hinders the traveling of the elevator. However, particularly in the case of a hydraulic elevator, if the main rope expands, there is a problem that it cannot rise to the top floor.

Therefore, conventionally, in order to prevent the occurrence of this problem, the extension of the main rope has been corrected.

[0006] As a correction method, in addition to the main support member for supporting the main rope, another support member is provided at the end portion of the main rope attached to the car so that the main rope is loaded. Japanese Patent Application Laid-Open No. 4-317980 discloses a method in which a main supporting member including a stretched portion of the main rope is corrected while supporting the tension by the other supporting member so as to support the main rope. Was proposed in.

[0007]

However, in the above-mentioned prior art, for each elevator for which the main rope elongation correction is performed,
Since another support member must be provided in addition to the main support member, there is a problem that the cost becomes high.

Since the other supporting member must be fixed to the main supporting member by means such as welding,
There is also a problem that the installation work becomes complicated.

The present invention has been made in view of the above problems, and an object thereof is a tension adjusting device for an elevator main rope, which has a simple structure, is inexpensive, and can easily perform a main rope elongation correction operation. To provide.

[0010]

In order to achieve the above object, the present invention provides a socket attached to a main rope end, which is connected to this socket at one end and is inserted into a support portion at the other end. A thimble rod protruding to the opposite side, and a nut screwed to the other end of this thimble rod,
In a rope end portion formed of this nut and a spring member provided between the supporting portions, in a tension adjusting device for an elevator main rope supported by the supporting portion, one end is supported by the socket and the other end is supported. A first shaft portion having a first screw portion, and a second shaft portion supported at the one end by the support portion and having at the other end a second screw portion that is a reverse thread to the first screw portion. And a turnbuckle portion screwed to each of the first and second shaft portions.

As described above, according to the present invention, the socket and the supporting portion respectively support the first and second shaft portions, and the first and second shaft portions are supported.
Since the turnbuckle portion is screwed into the screw portion of the second shaft portion to configure the tension adjusting device for the main rope, the first shaft portion allows thimble through the socket in response to screwing the turnbuckle portion. The rod can be pushed down to create a gap between the support and the spring member.

Therefore, by tightening the nut in this state, the extension of the main rope can be corrected.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings, taking a hydraulic elevator as an example.

FIG. 3 is a vertical cross-sectional view of the hoistway showing the overall construction of the hydraulic elevator used in the embodiment of the present invention.

In FIG. 3, the main rope terminals of the hydraulic elevator are attached to the support portion 3 attached to the lower portion of the car 1 and the support portion 3 attached to the support base 13 installed on the pit floor 4.
The structure is such that the thimble rod 2 is attached.

The hydraulic elevator has a cylinder 11
The plunger 10 contained therein is pushed up by the oil sent from the hydraulic unit (not shown).

Further, the car 1 is connected to the support portion 3 attached to the support base 13 via the main rope 9, and when the plunger 10 is pushed up, the pulley 12 rotates and rises, and the descending direction is reversed. Is.

As the main rope 9 elongates as the traveling time of the hydraulic elevator increases and decreases in this way, the mounting nut 6 is tightened when the main rope 9 extends to correct the extension of the main rope 9. ing.

Next, the main rope elongation correction work using the tension adjusting device for the main rope of this embodiment will be described with reference to FIGS. 1 and 2.

FIG. 1 is a front view showing a state in which a tension adjusting device for an elevator main rope according to an embodiment of the present invention is mounted, and FIG.
FIG. 2 is a side view of FIG. 1.

In the figure, 9 a is an end portion of the main rope 9, which is attached to the socket 7.

Reference numeral 2 is a thimble rod, which is attached to the socket 7 by a pin 8 at one end and is inserted into the supporting portion 3 at the other end and projects to the opposite side.

A threaded portion is provided at the other end of the thimble rod 2, and a nut 6 is screwed into the threaded portion.

The other end of the thimble rod 2 is supported by the support portion 3 between the nut 6 and the support portion 3 by the spring member 5 and the spring washer 5a.

The rope end portion referred to in the present invention is formed by the socket 7, the thimble rod 2, the nut 6 and the spring member 3 described above.

As described above, the main rope 9 is supported by the support portion 3 at the rope end portion. In order to correct the main rope extension at this rope end portion, first, the following is performed. The main rope tension adjusting device 14 is installed in the.

That is, first, one end of the first shaft portion 14a is inserted into and supported by the hole portion 7a formed in the socket 7,
Next, the support portion engagement portion 14d to which one end of the second shaft portion 14b is attached is engaged with the support portion 3.

Then, the first and second shaft portions 14a, 14
First and second screw portions 141a, 14 formed on the other end of b
Since the turnbuckle portion 14c is formed on the 1b, the screw portions 141c and 142c are screwed together.

The tension adjusting device 14 for the main rope according to this embodiment includes the first and second shaft portions 14a and 14b.
The turnbuckle portion 14c and the support portion engaging portion 14d are formed.

When the tension adjusting device 14 is installed as described above, the turnbuckle portion 14c is rotated.

By doing so, the first shaft portion 14a
Is screwed downward, and the second female screw portion 142c is a reverse screw, so that the second shaft portion 14b is screwed upward.

Therefore, the socket 7 is pushed downward with the support portion 3 as a fulcrum, and a gap is created between the support portion 3 and the spring member 5.

When the nut 6 is tightened to fill this gap, the other end of the pushed up thimble rod 2 is held at that position.

Therefore, before tightening the nut 6,
Since a large tension is applied to the main rope 9, the elongation of the main rope is corrected by this tension.

When the turnbuckle portion 14c is rotated in the reverse direction and the tension adjusting device 14 is removed, the main rope extension correction work is completed.

As described above, in the present embodiment, since the tension adjusting device 14 is configured to be detachable, it is possible to carry out the work of the elevator which requires the elongation adjustment, if it is carried and carried.

The tension adjusting device 14 of the present embodiment is
Since the shafts 14a and 14b and the turnbuckle portion 14c are easily configured, the cost can be reduced, and the tension of the main rope 9 can be adjusted only by rotating the turnbuckle portion 14c. , It is possible to easily perform rope extension correction work.

In this embodiment, the hydraulic elevator has been described as an example, but any elevator having the above-mentioned rope terminal portion can be applied to all types.

[0039]

According to the present invention, since the tension adjusting device is configured as described above, it is possible to perform the main rope elongation correction operation with a simple and inexpensive structure.

[Brief description of drawings]

FIG. 1 is a front view showing an attached state of a tension adjusting device for an elevator main rope according to an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a vertical cross-sectional view of a hoistway showing the overall configuration of a hydraulic elevator used in an embodiment of the present invention.

[Explanation of symbols]

 2 thimble rod 3 support part 5 spring member 6 nut 7 socket 9 main rope 14 elevator main rope tension adjusting device 14a first shaft part 141a first screw part 14b second shaft part 141b second screw part 14c turn Buckles 141c, 142c Turnbuckle female thread

Claims (1)

[Claims] 1. A socket attached to a main rope end, a thimble rod which is connected to the socket at one end and which is inserted into a supporting portion at the other end and projects to the opposite side, and the other end of the thimble rod. A nut that is screwed into
In a rope end portion formed of this nut and a spring member provided between the supporting portions, in a tension adjusting device for an elevator main rope supported by the supporting portion, one end is supported by the socket and the other end is supported. A first shaft part having a first screw part, and a second shaft part supported by the support part at one end and having a second screw part opposite to the first screw part at the other end. A tension adjusting device for an elevator main rope, comprising: a turnbuckle portion screwed to each of the first and second shaft portions.