JPH0539181A - Rope tension device for elevator - Google Patents

Abstract

PURPOSE:To provide a rope tension device of high safety and excellent workability for adjusting tension and length of a rope which supports a cage frame or a balance weight of an elevator. CONSTITUTION:A rope 1 of an elevator is connected to a piston 6 in a hydraulic cylinder 5 through a socket member 2, link member 12 and a piston rod 4. The hydraulic cylinder 5 is fixed to a hoisting board 9 by bolts 8. The hydraulic cylinders 5 are connected to each other by a pipe 10 to uniformly control tension of a plurality of the ropes during operation of the elevator. In the link member 12, the piston rod 4 is mounted with a spring 14 interposed, and one end of the socket member 2 is mounted by nuts 13, 13a so that length of the rope can be adjusted. In the case of fixing the piston 6 to hesitate, the rope can be prevented from its quick change of tension by the spring 14, and the length and tension of the rope can be easily adjusted by the nuts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope tensioning device for an elevator, and more particularly to a rope tensioning device for an elevator that tensions a rope supporting a car frame or a counterweight of the elevator.

[0002]

2. Description of the Related Art As a conventional technique relating to a rope tensioning device for supporting a car frame or a counterweight of an elevator,
For example, JP-A-53-23448 and Japanese Utility Model Laid-Open No. 56-
The technique described in Japanese Patent No. 13472 is known.

These prior arts are provided with a mechanism for adjusting the length of each of a plurality of ropes when the elevator is installed and a mechanism for stopping the rotation of the ropes, and allow the liquid chambers of the cylinders supporting the ropes to communicate with each other. Thus, the tension of each of the plurality of ropes is made uniform.

[0004]

Generally, when assembling an elevator, it is common that a plurality of ropes supporting the car frame and the counterweight are different in length due to an installation error. It is necessary to adjust the length.

The above-mentioned prior art is effective in that the length of the ropes can be adjusted and the tensions of the plurality of ropes can be made uniform, but the lengths of the plurality of ropes are completely equalized during installation. It is difficult to do, and it is difficult to cope with the elongation of the rope during the operation of the elevator, and when the piston in the cylinder supporting the rope gets stuck for some reason during operation, There is a problem that the tension adjusting function of the rope corresponding to this is completely lost.

The object of the present invention is to solve the above-mentioned problems of the prior art, and to easily absorb even if there is an installation error, and in the unlikely event that the piston gets stuck during operation of the elevator, Another object of the present invention is to provide a rope tensioning device for an elevator which is capable of coping with these and which is highly safe and has excellent workability.

[0007]

According to the present invention, the above objects are achieved by a rope length adjusting mechanism, a detent mechanism for preventing rotation of a rope end portion, and a tension for equalizing tensions of a plurality of ropes. By providing an elastic body that receives a reaction force of the tension of the rope at a rope end portion provided with an adjusting mechanism, a gauge such as a scale plate for displaying the deflection of the elastic pair, or a deflection detecting device for the elastic body. This is achieved by further providing a valve in the hydraulic pipe that connects the cylinders of the tension adjusting mechanism.

[0008]

[Operation] When the elevator is installed, the length of the ropes supporting the car frame and the counterweight can be adjusted by the length adjustment mechanism while checking the bending of the elastic body. , It is possible to eliminate the length error between the ropes. In addition, since the elastic body always bends in proportion to the rope tension even when the elevator is in operation, if an abnormality occurs in the tension adjustment mechanism and the rope tension changes in response to this abnormality, Also, a gauge such as a scale plate provided on the elastic body can be used to grasp and check this abnormality during maintenance. Further, by providing a detection device instead of the gauge, it is possible to automatically detect the abnormality in this case.

Further, the valve provided between the cylinders is closed before connecting the ropes during the elevator installation adjustment so that the ropes can be connected with the movement of the piston fixed. Since the piston is fixed, the length of the rope can be adjusted in such a state by flexing the elastic body so that the tension of the initial rope can be made uniform with high accuracy. After that, the valve is opened, and the operation of the elevator can be started with the tension adjusting mechanism in the operating state.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a rope tensioning device for an elevator according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram showing the structure of a first embodiment of the present invention. In FIG. 1, 1 is a rope, 2 is a socket member, 3 and 3a are detents, 4 is a piston rod, and 5 is hydraulic pressure. Cylinder, 6 piston, 9 hanging plate, 10 pipe,
Reference numeral 12 is a connecting member, and 14 is a spring.

In the first embodiment of the present invention shown in FIG. 1, an elevator rope 1 for supporting a car frame or a counterweight not shown is a socket member 2 to which the rope 1 is coupled, a connecting member 12, a piston rod. 4 is connected to a piston 6 which is fitted in a hydraulic cylinder 5 in which an oil 7 as a hydraulic fluid is contained. Hydraulic cylinder 5
Has an air bleeder 20 at its bottom and is fixed to a car frame or a counterweight, and is fixed to a suspension plate 9 for suspending the load of the car frame or the counterweight on a rope by bolts 8 for fixing the hydraulic cylinder 5. Has been done.

The pipe 10 connects the hydraulic cylinders 5 to each other, whereby the tensions of a plurality of ropes can be uniformly controlled while the elevator is operating.

The connecting member 12 is a member for connecting the socket member 2 and the piston rod 4, and the piston rod 4 is attached by sandwiching the spring 14 via the spring seat 4a, and the socket member provided with the screw portion 2a. One end of 2,
It is attached by nuts 13 and 13a.

A pin 11 penetrating the socket member 2 is attached to a joint portion of the socket member 2 with the rope 1, and the plate member 3 is sandwiched between the socket members 2 to prevent the plate member 3 from rotating.
Is arranged, and the pin 11 is slidably connected to the long holes 3b provided in the rotation stoppers 3 and 3a.

In the first embodiment of the present invention constructed as described above, when the elevator is installed, the nuts 13 and 13a provided on the threaded portion 2a of the socket member 2 allow
The connecting position of the socket portion 2 to the connecting member 12 is adjusted so that the spring 13 has a uniform length. As a result, it is possible to eliminate the error in the rope length that occurs when the elevator is installed, easily adjust the tension of the rope 1 uniformly, and set the state of the piston 6 in the hydraulic cylinder 5 to an optimum position. .. After that, rotation stop 3, 3
By setting a and the pin 11, it is possible to prevent the tension of the rope 1 from being loosened due to the rotation of the rope 1.

According to the first embodiment of the present invention described above,
When installing the elevator, the tensions of the plurality of ropes 1 can be easily and uniformly adjusted. Further, according to the first embodiment of the present invention, when the piston 6 is stiff and the tension of the rope 1 corresponding to the piston 6 changes during the operation of the elevator, the length of the spring 14 changes, It is possible to prevent a rapid change in the tension of the rope 1 and prevent an adverse effect on the rope 1 or other devices. Further, by checking the length of the spring 14 at the time of maintenance and inspection, it is possible to easily grasp the abnormality of the piston 6.

FIG. 2 is a diagram showing the configuration of the second embodiment of the present invention. In FIG. 2, reference numeral 15 is a gauge, which is the same as in the case of other reference numerals 1.

The second embodiment of the present invention is an embodiment in which the amount of flexure of the spring 14 can be detected in addition to the above-described first embodiment of the present invention, and a gauge 15 is provided.
Is fixed to the connecting member 12, and the length of the spring 14 can be measured.

According to the second embodiment of the present invention, the length of the spring 14 can be easily checked by looking at the gauge 15 at the time of maintenance and inspection, and the abnormal state can be immediately known. it can. That is, when the rope 1 is abnormally stretched during the operation of the elevator or when the piston 6 is tightly fixed, a large imbalance occurs in the tension of each of the plurality of ropes, and the value of the gauge corresponding to each rope is Since it will be greatly different, an abnormality can be immediately known by looking at the value of this gauge during maintenance and inspection.

FIG. 3 is a diagram showing the configuration of the third embodiment of the present invention. In FIG. 3, 16 is a metal fitting, 17 is a detection body, and other reference numerals are the same as those in FIG.

In the third embodiment of the present invention, instead of the gauge 15 in the above-mentioned second embodiment of the present invention, a metal fitting 16 fixed to the piston rod 4 and a connection operated by the movement of the metal fitting 16 are provided. The detection unit 17 attached to the member 12 is provided with an abnormality detection mechanism for the spring 14. The detection body 17 may be a limit switch or the like, which detects this when the spring 14 is in an abnormal expansion / contraction state and issues an alarm or the like to the outside.

According to the third embodiment of the present invention, when the elevator is in operation, piston tightness occurs and the spring 14
Since it is possible to automatically detect an abnormality such as when the vehicle is in an abnormal expansion / contraction state, the elevator can be made highly safe.

FIG. 4 is a diagram showing the configuration of the fourth embodiment of the present invention. In FIG. 4, 19 is a valve, and other reference numerals are the same as those in FIG.

In the fourth embodiment of the present invention, a valve 19 for opening and closing the flow path of the oil 7 is provided in the middle of a pipe 10 connecting the hydraulic cylinders 5 to each other. This valve 19 is used to close the piston 6 in the connected hydraulic cylinder 5 when the elevator is installed, and close it, and adjust the length and tension of the rope 1 in this state. ..

That is, when the elevator is installed, a plurality of hydraulic cylinders 5 are attached, the valve 19 is closed while the pistons 6 are all in the same position, and the pistons 6 are fixed so that the pistons 6 do not move. In this state, the rope 1 is attached to the connecting member 12 via the socket member 2, and the length and tension of the rope 1 are adjusted by the nuts 13 and 13a.

According to the fourth embodiment of the present invention, since the plurality of hydraulic cylinders 5 are separated from each other by the valve 19, the piston rod 4 is in a fixed state, so that the rope 1 can be adjusted significantly. Can be done easily. After completion of this adjustment, the tension of the rope 1 can be automatically adjusted and balanced by opening the valve 19 thereafter.

A valve 19 is provided in the middle of the pipe 10 for connecting the cylinder 5 according to the fourth embodiment of the present invention described above.
The configuration including the can be applied to a cord tension device that does not include the spring 14, and in this case also, the effect that the adjustment of the rope 1 can be significantly facilitated can be obtained. it can.

The above-described first to fourth embodiments of the present invention are as follows.
Although the description has been made assuming that there are two ropes that are ropes, the present invention can be applied to the case where the number of ropes is further increased.

[0030]

As described above, according to the present invention, it is possible to prevent an abrupt tension change of the rope when the piston becomes tight, and it is possible to easily grasp an abnormal state. You can get a tall elevator cord tension device. Further, according to the present invention, it is possible to remarkably easily absorb the error in the length of the rope when the elevator is installed, and it is possible to improve the workability.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a first exemplary embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a third exemplary embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of a fourth exemplary embodiment of the present invention.

[Explanation of symbols]

 1 Rope 2 Socket Member 3 Detent 4 Piston Rod 5 Hydraulic Cylinder 6 Piston 7 Oil 9 Suspension Plate 10 Pipe 11 Pin 12 Connecting Member 14 Spring 15 Gauge 16 Metal Fitting 17 Detector 19 Valve

Claims (6)

[Claims] 1. A piston, to which each of a plurality of cords is connected, a cylinder arranged in each of these pistons, and a pipe communicating between the cylinders, wherein a working fluid is contained in the cylinder and the pipe. A rope tensioning device for an elevator, wherein the tensioning device for an elevator rope is provided with an elastic body that supports tensions of a plurality of ropes corresponding to each rope. 2. A piston to which each of a plurality of cords is connected, a cylinder in which these pistons are individually arranged, a mechanism for adjusting the length of the cord, and a pipe for connecting the cylinders to each other. In a rope tensioning device for an elevator, which is configured by filling the cylinder and the pipe with hydraulic fluid, a pipe that communicates between the cylinders is provided with an openable / closable valve that blocks the flow of the hydraulic fluid. An elevator rope tensioning device characterized by the above. 3. A piston, to which each of a plurality of cords is connected, a cylinder in which these pistons are individually arranged, an adjusting mechanism for the length of the cord, and a pipe connecting the cylinders to each other. In the elevator rope tensioning device configured by filling the cylinder and the pipe with hydraulic fluid, an elastic body that supports the tension of each of the plurality of ropes is provided for each rope, and the cylinder A rope tensioning device for an elevator, characterized in that a pipe that communicates with each other is provided with a valve that can be opened and closed to prevent the hydraulic fluid from flowing. 4. A piston to which each of a plurality of cords is connected, a cylinder individually arranged to these pistons, and a pipe communicating between the cylinders are provided. A rope tensioning device for an elevator, which is configured to be filled with the elevator tensioning device, comprising a mechanism for detecting a bending of the cord when the cylinder is locked. 5. The mechanism for detecting the flexure of the cord is composed of an elastic body that supports the tension of each of the plurality of cords, and a scale plate that indicates the displacement of the elastic body. The rope tensioning device for an elevator according to claim 4. 6. The mechanism for detecting the bending of the cord is composed of an elastic body that supports the tension of each of the plurality of cords, and a mechanism that detects the displacement of the elastic body. The rope tensioning device for an elevator according to claim 4.