JPH06263360A - Safety device for self-propelled elevator - Google Patents

Abstract

PURPOSE:To enhance the safety of passengers and reliability of a self-propelled elevator which can be self-propelled through an elevator shaft in a high-rise building, by holding a car in the self-propelled ear in a safe condition even when the car abruptly stops. CONSTITUTION:In a self-propelled elevator having a car which ascends and descends through an elevator shaft, a pair of upper brake devices 30 are attached to the upper part of the car 3, facing an wall surface of the an elevator shaft 1, and a pair of lower brake devices 31 are attached to the lower part of the car, facing the wall surface of the elevator shaft 10. Further, a speed detector 10 for the car 3 is attached to each of both brake devices 30, 31. Further, these detectors 10 operate both brake devices 30, 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a car in a self-propelled elevator traveling on a hoistway in a high-rise building.

[0002]

2. Description of the Related Art A self-propelled elevator equipped with a linear motor that has been proposed has been proposed in which a car is moved up and down in a hoistway by a thrusting action of a primary coil and a secondary conductor of the linear motor. .

That is, in FIG. 5, a plurality of (three) secondary conductors 2 of a linear motor are provided in a hoistway 1 of a high-rise building.
a, 2b, 2c are erected in the vertical direction, and on both side surfaces of the respective cages 3, 4, 5 facing the respective secondary conductors 2a, 2b, 2c of the respective linear motors, Each primary coil 6 is provided so as to move up and down by the thrust action of the secondary conductors 2a, 2b, 2c. Further, the secondary conductors 2a, 2 are provided at the branching portion (point) 2d where the trailing car 3 overtakes the preceding cars 4, 5 and ascends and descends.
b and 2c are connected via respective branches, and a pair of upper and lower guide wheels 7 are provided on the respective cars 3, 4, 5 so as to run along respective guide rails (not shown). There is. Further, a power supply line (not shown) is laid in the hoistway 1, and a power supply line (not shown) is installed on each of the car cages 3, 4, 5 for collecting drive, control and lighting power. The electric device 8 is provided so as to contact and supply power.

Therefore, the self-propelled elevator equipped with the above-mentioned linear motor is provided with each primary coil 6 of the linear motor.
When electricity is applied to each of the primary coils 6 and the secondary conductors 2
The above cages 3, 4, by the thrust action of a, 2b, 2c.
Going up and down 5.

On the other hand, when the trailing car 3 passes the preceding cars 4 and 5 and ascends and descends, the preceding cars 4 and 5 are stopped at a predetermined floor, and then the primary coils 6 and The above cage 3 by the thrust action with the secondary conductor 2a
Is moved up and down through the branch of the branch portion 2d.

On the other hand, a safety device for a car in a self-propelled elevator is constructed as shown in FIGS. 6 to 8 (Japanese Patent Application No. 4-274188).

6 to 8, a high-pressure storage tank 9 is provided in the lower portion (bottom surface) 3a of the car 3 filled with compressed air, and an outlet of the high-pressure storage tank 9 detects a speed. A container 10 is attached to detect the ascending / descending speed of the car 3. The speed detector 10 is provided with a dynamic pressure pipe 11a and a static pressure hole 11b, respectively. The speed detector 10 has a dynamic pressure pipe 11a and a static pressure hole 11b.
The abnormal speed of the car 3 is detected by the pressure difference due to b. Further, the speed detector 10 is provided with a relief valve 12, and the relief valve 12 includes
A pair of actuators 13 are connected to each other via respective compressed air supply pipes 15 provided with respective check valves (check valves) 14. Furthermore, a pair of lower braking members 16 are provided on both actuators 13 of the lower portion 3a of the car 3 so as to face the wall surface 1a of the hoistway 1, and both lower braking members 16 are provided. When the ascending / descending speed of the vehicle reaches a predetermined abnormal set speed, the lower braking member 16
Applies pressure to the wall surface 1a of the hoistway 1 to apply braking to stop the car 3.

Therefore, in the safety device for a car in the above-mentioned self-propelled elevator, when the ascending / descending speed of the car 3 reaches a predetermined abnormal set speed for some reason, the speed detector 10 causes the dynamic pressure pipe 11a to operate. An abnormal speed of the car 3 is detected by the pressure difference between the static pressure hole 11b and the speed detector 1.
0 opens the relief valve 12 to supply compressed air in the high-pressure storage tank 9 to each supply pipe 15 equipped with each check valve 14.
Through the actuators 13 to actuate the actuators 13 respectively, thereby pressing both lower braking members 16 against the wall surface 1a of the hoistway 1 for braking to stop the hoisting operation of the car 3. is doing.

[0009]

However, in the above-described safety device for a car in the self-propelled elevator, as shown in FIG. 7, when the car 3 is in an abnormal speed state while the branch portion 2d is moving up and down. Since it is predicted that the car 3 will make an emergency stop, at this time, as shown in an exaggerated manner in FIG. 8, the car 3 is balanced because the entire safety device is installed at the bottom of the car. Not only may the car 3 invert around the lower braking members 16 to give an impact to passengers, but also the car 3 may be in an abnormal speed state even when the hoistway 1 is vertically moved. In such a case, the car 3 is brought to an emergency stop, and there is a problem that the car 3 loses balance and may be inverted around the lower braking members 16.

In order to solve the above-mentioned problem, the present invention provides a self-propelled elevator equipped with a linear motor,
Safety of a self-propelled elevator that keeps the balance of the car safely and surely to improve the safety and reliability of passengers even if the car is in an abnormal speed state and the car suddenly stops The purpose is to provide a device.

[0011]

SUMMARY OF THE INVENTION The present invention is a self-propelled elevator for a car that moves up and down a hoistway, and a pair of upper braking devices are provided on the top of the car so as to face the wall surface of the hoistway. A pair of lower braking devices are provided in the lower part of the car facing the wall surface of the hoistway, and a speed detector for the car is installed in both of the braking devices, and when the car reaches an abnormal set speed, The speed detector operates both of the braking devices.

[0012]

According to the present invention, when the ascending / descending speed of the car 3 reaches a predetermined abnormal set speed, the ascending / descending speed of the car is detected by the speed detector, and the speed detector opens the relief valve to raise the high pressure. Compressed air from the storage tank is supplied to the actuators through the supply pipes, and the actuators are respectively actuated to press both upper braking members against the wall surface of the hoistway for braking, and the high pressure storage tank. Compressed air is supplied to each actuator at the bottom of the car with a slight delay through each supply pipe by the distributor valve, and both actuators are actuated respectively, whereby both lower braking members are brought to the wall surface of the hoistway. Pressing and braking to stop the elevator car movement,
It aims to improve the safety and reliability of passengers by maintaining the balance of the car safely and securely even if the car is stopped in an emergency.

[0013]

The present invention will now be described with reference to the illustrated embodiments.

In the present invention, the same components as those in the above-described specific example are designated by the same reference numerals.

In FIGS. 1 to 4, reference numeral 1 is a hoistway of a high-rise building, and a secondary conductor 2a of a linear motor is erected in the hoistway 1 in the vertical direction. On both side surfaces of the car 3 facing the respective secondary conductors 2a, the respective primary coils 6 of the linear motor are provided so as to move up and down by the thrusting action with the secondary conductor 2a. Further, a pair of upper braking members 20 are provided on the upper portion 3b of the car 3 so as to face the wall surface 1a of the hoistway 1, and both upper braking members 20 are, for example, paired by a cylinder device. Actuator 21 is connected to press both upper braking members 20 against the wall surface 1a, and the upper braking member 20 and the actuator 21 constitute an upper braking device 30. Further, as shown in FIG. 3, a bearing 22 such as a ball bearing is provided between the base portion 20a of the upper braking member 20 and the actuator 21, and the bearing 22 stops the car 3 in an emergency. At this time, as shown in FIG. 4, the car 3 is rotatable.

As a result, the car 3 maintains a balance to ensure the safety and reliability of passengers.

Further, compressed air supply pipes 23 are connected to the actuators 21, and a distributor valve 24 such as a flow distributor valve is connected to the supply pipes 23. Has been done. That is, as shown in FIG. 2, the distributor valve 24 has a valve body 24a having a T-shaped cross section.
A valve seat 24b formed by a taper is formed in the lower part of the valve seat 24b, and a valve body 24c formed of a ball (steel ball) is biased upward by the elasticity of the coil spring 24d to close the valve seat 24b.

Therefore, the distributor valve 24 is
When the car 3 is in an abnormal speed state for some reason and the ascending / descending speed of the car 3 reaches a predetermined abnormal set speed, the actuators 21 of the upper braking members 20 are operated, Thereafter, the compressed air in the high-pressure storage tank 9 is used to press the valve body 24 of the distributor valve 24.
The valve c is opened against the elasticity of the coil spring 24d, and the supply pipe 2
Through 6 there is a slight delay in supplying to both actuators 28 provided under the car 3.

On the other hand, the high pressure storage tank 9 is connected to the distributor valve 24 through a connecting pipe 25, and the high pressure storage tank 9 is filled with compressed air. A relief valve 12 is provided at the outlet of the high-pressure storage tank 9, and the relief valve 12 is provided with the speed detector 10. Further, as shown in FIG. 6, the speed detector 10 is provided with a dynamic pressure pipe 11 a and a static pressure hole 11 b so as to detect the ascending / descending speed of the car 3.
Is the cage 3 due to the pressure difference between the dynamic pressure pipe 11a and the static pressure hole 11b.
The vertical speed of is detected. Further, each supply pipe 26 equipped with each check valve (not shown) is branched and connected to the lower portion of the distributor valve 24, and a pair of lower portions is connected to the lower portion 3a of the car 3. A braking member 27 is provided so as to face the wall surface 1a of the hoistway 1, and a pair of actuators 28 are provided on both lower braking members 27 to move the lower braking member 27 to the wall surface 1a and the upper braking members 20. Distributor valve 2 above
4, the lower braking member 27 and the actuator 28 constitute a lower braking device 31.

The operation of the present invention will be described below. Therefore, when the car is in an abnormal speed state for some reason and the ascending / descending speed of the car 3 reaches a predetermined abnormal set speed, the speed of the car 3 is detected by the speed detector 10, and The speed detector 10 opens the relief valve 12 to supply the compressed air in the high-pressure storage tank 9 to both the actuators 21 through the connecting pipe 25, the distributor valve 24 and the supply pipe 23, and the both actuators 21 are respectively supplied. Operate. As a result, both upper braking members 20 press against the wall surface 1a of the hoistway 1 to apply braking.

Thereafter, when the air pressure in the supply pipe 23 becomes sufficiently high, the compressed air in the supply pipe 23 together with the compressed air in the high-pressure storage tank 9 is, as described above, the valve of the distributor valve 24. When the body 24c is opened against the elastic force of the coil spring 24d (see FIG. 2) and is supplied to the actuators 28 of the lower portion 3a of the car 3 through the supply pipe 26 with a slight delay, both actuators 28 operate respectively. As a result, both lower braking members 27 press against the wall surface 1a of the hoistway and apply braking to stop the ascending / descending operation of the car 3. Therefore, as shown in FIG. 4, the lower braking members 27 stop in a stable state.

As described above, according to the present invention, even if the car 3 is stopped in an emergency, the balance of the car is maintained securely and surely to improve the safety and reliability of passengers.

Although the present invention has been described with reference to the bearing 22 provided between the base of the upper braking member 20 and the actuator 21, the car 3 can be rotated.
The bearing 22 may be replaced with a universal joint or a ball bearing, for example, within the scope of the present invention. Further, the present invention provides a bearing 22 between the base of the lower braking member 27 and the actuator 28.
It is needless to say that the car 3 may be provided so as to be rotatable.

[0024]

As described above, according to the present invention, a pair of upper braking devices are provided on the upper part of the car so as to face the wall surface of the hoistway, and a pair of lower braking devices are mounted on the lower part of the car to lift and lower. It is installed facing the wall surface of the road, and a speed detector for the car is installed on both of the braking devices.When the car reaches an abnormal speed setting, the speed detector operates both braking devices. It is excellent not only for maintaining the balance of the car safely and reliably even if the car stops due to an emergency due to the abnormal speed of the car, but also for improving the safety and reliability of passengers. Have the effect.

[Brief description of drawings]

FIG. 1 is a side view of a safety device for a self-propelled elevator according to the present invention.

FIG. 2 is an enlarged cross-sectional view of chain circle A in FIG.

FIG. 3 is an enlarged cross-sectional view of chain circle B in FIG.

FIG. 4 is a view for explaining the operation of the safety device for a self-propelled elevator according to the present invention.

FIG. 5 is a perspective view of a self-propelled elevator that has already been proposed.

FIG. 6 is a perspective view of a safety device for a self-propelled elevator that has already been proposed.

FIG. 7 is a diagram for explaining the operation of a safety device for a self-propelled elevator that has already been proposed.

FIG. 8 is a diagram for explaining the operation of a safety device for a self-propelled elevator that has already been proposed.

[Explanation of symbols]

 1 Hoistway 3 Car 9 High-pressure storage tank 10 Speed detector 20 Upper braking member 21 Actuator 22 Bearing 24 Distributor valve 27 Lower braking member 28 Actuator 30 Upper braking device 31 Lower braking device

Claims (4)

[Claims] 1. A self-propelled elevator for a car that moves up and down a hoistway, wherein a pair of upper braking devices are provided on an upper part of the car so as to face a wall surface of the hoistway, and a lower part of the car. A pair of lower braking devices provided so as to face the wall surface of the hoistway, and a car speed detector provided in the both braking devices are provided, and when the car reaches an abnormal set speed, A safety device for a self-propelled elevator, characterized in that a speed detector operates both of the braking devices. 2. A high-pressure storage tank connected to an upper braking device via a distributor valve, and connected to the distributor valve so as to come into pressure contact with a wall of a hoistway with a slight delay from the upper braking device. The safety device for a self-propelled elevator according to claim 1, further comprising a lower braking device. 3. The safety device for a self-propelled elevator according to claim 2, wherein the upper braking member is actuated by the distributor valve before the lower braking member. 4. The safety device for a self-propelled elevator according to claim 1, wherein a bearing is provided between the base portion of the upper braking member and the actuator to make the car rotatable.