JPH0624668A - Device for stopping swing of tail cord for controlling elevator - Google Patents

Abstract

PURPOSE:To provide a device capable of restraining the swing of a tail cord for controlling an elevator in the minimum lift well space. CONSTITUTION:Guide rails 9 of a car 1 guide a tail cord swing stopper 10 and first wire ropes 11 suspend the swing stopper 10. Further, the tail cord swing stopper 10 is connected to a counter weight through a second wire rope 14, so that a stable movement in the car being lowered is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control device for an elevator control tail cord that effectively utilizes a space in a hoistway.

[0002]

2. Description of the Related Art A tail cord for transmitting electric power, signals and the like from a control device in an elevator machine room to a car moves up and down in a hoistway in accordance with a lifting operation of the car. Therefore, due to various factors such as car vibration, wind pressure, acceleration / deceleration characteristics, twisting of the tail cord itself, material, etc., the bent portion at the lower end of the U-shaped tail cord swings and jumps out of the tail cord duct, It is conceivable that the wire breaks due to contact with various devices or protrusions or catching. For this reason, a tail cord guide for suppressing the swing of the tail cord is provided near the bent portion of the tail cord with the largest swing of the tail cord, and the vibration of the elevator control cable described in JP-A-3-13478 is disclosed. The device is being developed. This guide machine moves up and down while being guided by guide rails provided on both sides of the tail cord duct, and the tail code duct with the guide rail is adjacent to the guide rails of the car so as not to hinder the raising and lowering of the car. Has been installed.

[0003]

Since the guide rails of the prior art described above are provided with guide rails on both sides of the tail cord duct, a space for the guide rails must be secured in the hoistway. Needs to be increased.

Further, because of the position of the tail cord duct, it is necessary to secure a space required for the raising and lowering operation of the guide machine which is close to the hoistway wall, which makes it difficult to install the guideway in a narrow hoistway. .

Further, since the tail cord is guided by the guide machine which is close to the hoistway wall, the fixed point of the tail cord for the car deviates from the center of gravity and an unbalanced load is applied, which causes tilting and shaking.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vibration control device for an elevator control tail cord capable of suppressing vibration of the elevator control tail cord in a minimum hoistway space.

Another object of the present invention is to suppress the inclination and sway of the car caused by the tail code for controlling the elevator.

[0008]

[Means for Solving the Problems] The above object is to suspend at least one end of a hoistway wall from a central portion thereof, and suspend the other end by a wire rope fixed to a car, and both ends thereof to guide rails of the car. It is achieved by providing tail cord guide means for guiding the bent portion of the elevator control tail cord which is guided by the vehicle and which connects the car and the control panel.

The above-mentioned object is to suspend the hoistway wall at least above the center by suspending the other end by a wire rope fixed to the car, and guiding both ends by the guide rails of the car. This is achieved by providing tail cord guide means for guiding the bent portion of the elevator control tail cord that connects the substantially central portion of the control panel to the control panel.

The above object is achieved by providing the tail cord guide means with a first grooved pulley for guiding the elevator control tail cord.

The above-mentioned object is to provide a second grooved pulley arranged below the tail cord guide means, a third grooved pulley arranged on the hoistway floor, and a hoistway floor below the balance weight of the car. The fourth grooved pulley arranged and one end fixed to the hoistway floor and the other end through the second grooved pulley, the third grooved pulley and the fourth grooved pulley to the car. This is achieved by providing a second wire rope fixed to the lower end of the counterbalance weight.

The above-mentioned object is to provide a sensor for detecting the tension in any fixed portion of the second wire rope, and a control means for outputting an alarm and an elevator stop command depending on the degree of the abnormal tension detected by the sensor. Achieved by

The above-mentioned object is to output means for supporting the third grooved pulley in a vertically movable manner, a sensor for detecting the vertical movement, and an alarm and an elevator stop command depending on the degree of the vertical movement abnormality detected by the sensor. This is achieved by providing a control means for controlling.

[0014]

According to the above construction, since the tail cord guide means is guided by the guide rails of the car, it is not necessary to newly provide a space for the guide rail in the hoistway, and the tail cord guide means is provided at the center of the hoistway. It can be installed in the hoistway in the same space as before because it is lifted up and down and its size is at least smaller than the car.

The tail cord guide means guides the tail cord at the central portion, and the connecting portion between the tail cord and the car is provided at the central portion of the car, so that the tilt and swing of the car can be prevented without applying an unbalanced load. Suppressed.

Further, in order to ensure the operation of the tail cord guide means when descending, the second wire rope connects the steady rest and the balance weight of the car, and the rising balance weight operates to move the second wire. A downward force can be applied to the tail cord guide means via the rope to prevent the tail cord guide means from being stiff and stuck.

By providing the tail groove guide means with the second grooved pulley wound around the bent portion of the tail cord, even if the tail cord has a large bending radius due to its large tensile strength, downward tension is applied to the tail cord. Can be guided within the bend radius of.

When the sensor detects an abnormally high tension in the fixed part of the second wire rope, the control means outputs an alarm in order to prevent the second wire rope from being cut,
Further, when no tension is detected, it is considered that the second wire rope has been cut and an elevator stop command is output in order to prevent an expansion accident.

When the sensor detects an abnormally high position of the third grooved pulley, the control means outputs an alarm to prevent disconnection of the second wire rope, and the position is detected to be at the lower limit. When this happens, an elevator stop command is output in order to prevent an accident due to the second wire rope being cut.

[0020]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing the overall construction of the first embodiment of the present invention.

FIG. 2 is a plan view seen from the AA cross section of FIG.

First Embodiment First, the structure of this embodiment will be described.

In the figure, 1 is a car, 2 is a counterweight of the car 1, 3 is a main rope connecting the car 1 and the counterweight 2, 4 is a hoisting machine around which the main rope 3 is wound, 5 Is a warp wheel, 6 is a control panel, 7 is a tail cord for transmitting electric power, signals, etc. between the control panel 6 and the car 1, one end of the tail cord 7 is to the car 1 and the other end is the middle of the hoistway It is supported at the height position 8 (or a tail cord junction box) and is connected to the control panel 6. Reference numeral 7A denotes a bent portion of the U-shaped tail cord 7, which moves up and down in accordance with the lifting operation of the car 1. 9 is a guide rail for the car 1,
The car 1 moves up and down along the guide rail 9 via the guide roller 1A (or guide shoe). Reference numeral 10 denotes a tail cord steadying device that moves up and down along the guide rail 9 and is guided by a roller 10A (or a guide shoe). 11 has one end fixed at a fixed point 11A on the hoistway wall side,
The other end is a first wire rope fixed to the car 1 at a fixing point 11B via a first grooved pulley 12 provided on the tail cord steadying device 10. The tail cord steady rest 10 is located at the bottom of the car 1 and has a tail cord 7
Is located above the bent portion 7A of the first wire rope 11
Hang with. Further, in order to suppress shake near the bent portion 7A where the shake of the tail cord 7 is the largest, a shake suppressing plate 13 is provided in the tail cord steadying device 10.

Next, the operation of this embodiment will be described.

As the car 1 moves up and down, the tail cord steadying device 10 operates at a speed half that of the car 1 due to the principle of a pulley suspended on a rope, one of which is fixed and the other of which is vertically moved. Ascending / descending, ascending / descending at the same speed as the bent portion 7A of the tail cord 7, the shake suppressing plate 13 guides and suppresses shake. The distance between the tail cord steadying device 10 and the bent portion 7A of the tail cord 7 is always kept constant irrespective of the position of the car 1, and the car 1 and the tail cord steadying device 10 do not come into contact with each other.

When the tail cord steadying device 10 is raised, the load within the permissible tension of the first wire rope 11 (including astringency and the like) can be raised, but when it is lowered,
When the tail cord steadying device 10 is in some state and the guide rail 9 is firmly fixed, the car 1 and the tail cord steadying device 10 may come into contact with each other. In order to eliminate such unstable operation at the time of descending, a second wire rope 14 is provided on the opposite side of the first wire rope 11,
One end thereof is fixed to the hoistway floor at a fixing point 14A, and the other end thereof is provided with a second grooved pulley 15 provided on the steady rest 10 and a third grooved pulley 16 and a fourth grooved pulley 17 provided on the hoistway floor. (One or more installations are possible depending on the installation conditions)
Fixed point 14 on the balance weight 2 of the car 1 via
Fix with B. With this configuration, when the car 1 descends, the counterweight 2 rises, and the second wire rope 14
Is pulled, and the tail cord steady rest 10 is pulled downward to descend. Therefore, even if the tail cord steadying device 10 is slightly stiff, it can be lowered within the allowable tension of the second wire rope 14.

Further, in order to prevent accidents due to the cutting of the second wire rope 14, the fixing point 1 of the second wire rope 14
4A is provided with a tension sensor (not shown) that detects an abnormal tension applied to the second wire rope 14, or a vertical movement sensor 18 that detects an abnormal vertical movement is provided in the fourth grooved pulley 17 portion, and the tension sensor of each sensor is provided. This is a configuration in which a control device for alarming and stopping the elevator is provided by detecting an abnormality. Although the first grooved pulley 12 is described as two in the description of the present embodiment, the tail cord steadying device 10 includes one or more grooved pulleys and one or more first wire ropes 11.
Even if it is configured, the same effect can be obtained.

Second Embodiment FIG. 3 is a side view showing the overall construction of the second embodiment of the present invention.

In FIG. 3, reference numerals 1 to 10 are components that are the same as or correspond to the components of the first embodiment. In the figure, when the tensile strength of the tail cord 7 is large,
For example, in the tail cord 7 in which a material having a strong tension such as a steel wire or a spring plate is incorporated, a pulley 19 is provided in a part of the tail cord steadying device 10, and the tail cord 7 is wound around the pulley 19. , Tail code 7
The tail cord 7 is prevented from swinging by adding the weight of the steady rest 10 and applying tension. In addition, using the second wire rope 14 described in the first embodiment with respect to this configuration, the steady rest 10 and the counterweight 2 are connected,
It is also possible to improve safety.

As described above, according to each embodiment, since the guide of the tail cord steadying device is shared with the guide rail of the car, it is not necessary to newly install a guide rail for the steadying device. Effective utilization of space in the hoistway and cost reduction can be achieved.

Further, since the weight of the tail cord and the steady rest does not apply an eccentric load to the suspension core of the car, the car does not tilt.

Further, by connecting the steady rest and the counterweight with the wire rope, the operation of the steady rest is made smooth and the safety is improved.

[0034]

According to the present invention, since the tail cord guide means is guided by the guide rails of the car, it is not necessary to newly provide a guide rail, and the tail cord for elevator control can be swung in a minimum hoistway space. The effect that deterrence is possible is obtained.

The tail cord guide means guides the tail cord at the central portion, and the tail cord connecting portion is provided at the central portion of the car, whereby the effect of suppressing the inclination and sway of the car can be obtained.

[Brief description of drawings]

FIG. 1 is a side view showing the overall configuration of a first embodiment of the present invention.

FIG. 2 is a plan view seen from the AA cross section of FIG.

FIG. 3 is a side view showing the overall configuration of the second embodiment of the present invention.

[Explanation of symbols]

 1 Cradle 2 Balance weight 7 Tail cord 7A Bending part of tail cord 9 Guide rail 10A Roller 10 Tail cord steady rest device 11 1st wire rope 12 1st grooved pulley 13 Shake suppression plate 14 2nd wire rope 18 Vertical motion sensor 19 pulley

Front page continuation (72) Inventor Toshio Meguro 1070 Ige, Katsuta, Katsuta-shi, Ibaraki Hitachi, Ltd. Mito Plant (72) Inventor Tsutomu Yoshioka 1070, Ige, Katsuta, Ibaraki Hitachi, Ltd. Mito, Ltd. 72) Inventor Teruo Sasaki 1070 Imo, Katsuta City, Ibaraki Prefecture Mito Plant, Hitachi, Ltd. (72) Hiromi Inaba 4026 Kuji Town, Hitachi City, Hitachi, Ibaraki Prefecture Hitachi Research Laboratory, Ltd. (72) Inventor Ando Takeki 1-6 Kandanishiki-cho, Chiyoda-ku, Tokyo Within Hitachi Building System Service Co., Ltd. (72) Inventor Yuji Onishi 1-6-kanda, Kanda Nishiki-cho, Chiyoda-ku, Tokyo Within Hitachi Building System Services

Claims (6)

[Claims] 1. A hoistway control system, wherein one end of the hoistway wall is fixed above at least a central part of the hoistway wall, the other end is suspended by a wire rope fixed to a car, and both ends are guided by guide rails of the car. An elevator control tail cord vibration isolator, comprising tail cord guide means for guiding a bent portion of an elevator control tail cord connecting a board. 2. A hoistway wall at least one end of which is fixed above a central portion of the hoistway wall, the other end of which is suspended by a wire rope fixed to a car, and both ends of which are guided by guide rails of the car, so that the car is almost An elevator control tail cord vibration isolator, comprising tail cord guide means for guiding a bent portion of an elevator control tail cord that connects a central portion and a control panel. 3. The tail cord for elevator control according to claim 1, wherein a first grooved pulley for guiding the tail cord for elevator control is provided in the tail cord guide means. Anti-vibration device. 4. A second grooved pulley located below the tail cord guide means, a third grooved pulley located on the hoistway floor, and a hoistway floor below the balance weight of the car. Of the fourth grooved pulley and the other end of the car through the second grooved pulley, the third grooved pulley and the fourth grooved pulley with one end fixed to the hoistway floor and the other end. A second wire rope fixed to the lower end of the counterweight is provided, and the elevator cord for stabilizing the tail cord according to any one of claims 1 to 4. 5. A sensor for detecting the tension in any fixed part of the second wire rope, and a control means for outputting an alarm and an elevator stop command depending on the degree of tension abnormality detected by the sensor are provided. The anti-swing device for a tail cord for elevator control according to claim 4. 6. A means for supporting the third grooved pulley so as to be movable up and down, a sensor for detecting the vertical movement, and an alarm and an elevator stop command depending on the degree of vertical movement abnormality detected by the sensor. The anti-sway device for a tail cord for elevator control according to claim 4, further comprising a control means.