JP2002179353A - Elevator braking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with power supply from the outside and to facilitate a mounting of a braking device to an elevator. SOLUTION: Rollers 28, 29 are disposed so as to clamp a rope 4 and a rotary generator 30 rotated/driven by the roller 28 is provided. An electricity generated by the rotary generator 30 is charged in a storage battery 27 and a controller 12 energizes the electricity charged in the storage battery 27 to a coil 22 in a solenoid-actuator 10 of a braking part 11 at the time of generation of an abnormality such as an excess speed of a car, etc., to move a movable element 24. The car is rapidly subjected to a speed reduction or stopped by clamping the rope 4 by braking members 20, 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator safety device, and more particularly to an elevator braking device for decelerating or stopping a car when an abnormality such as overspeed occurs.

[0002]

2. Description of the Related Art In an elevator, when a car is in an abnormal situation such as an overspeed, it is necessary to quickly decelerate or stop the car. As a method for this, conventionally, a rope is sandwiched between braking members. A braking device for braking a car is well known. In such a braking device, the braking or releasing operation is generally performed by an electromagnetic actuator or a fluid pressure actuator.

[0003]

However, in the above-mentioned conventional technique, it is necessary to supply power from outside the braking device in order to drive the electromagnetic actuator and the fluid pressure actuator. For example, in the case of an electromagnetic actuator, a drive power supply is required, and in the case of a fluid pressure actuator, energy necessary for the operation of the actuator is stored in a pressure accumulator. Since the hydraulic pump must be rotated to operate, a power supply for driving the motor is required.

However, in the configuration in which power is supplied from outside the braking device as described above, since the power cord must be laid to the braking device, there is a problem that the mounting position of the braking device is limited.

An object of the present invention is to eliminate the need for external power supply and to facilitate mounting of a braking device on an elevator.

[0006]

In order to achieve the above object, an elevator braking apparatus according to the present invention separates a braking section for decelerating or stopping a car from a part of kinetic energy generated by running the car. Energy converter for converting the energy into energy, energy storage means for storing the energy converted by the energy converter, and braking control means for controlling the driving of the braking unit using the energy stored in the energy storage means. It is characterized by having.

[0007] According to the above configuration, kinetic energy is generated as the car travels, and a part of the kinetic energy is converted into another energy by the energy converter and then stored in the energy storage means. Then, the braking control unit drives (brakes or releases the braking) the braking unit using the energy stored in the energy storage unit.

[0008] The elevator braking device of the present invention comprises:
A braking unit that decelerates or stops the car, a generator that generates electric energy by running the car, a storage battery that stores the electric energy generated by the generator, and the braking unit that uses the electric energy stored in the storage battery. And braking control means for driving the motor.

According to the above configuration, the generator generates electric energy as the car travels, and the electric energy is stored in the storage battery. Then, the braking control unit drives (brakes or releases the braking) the braking unit using the electric energy stored in the storage battery.

[0010] Further, the elevator braking device of the present invention comprises a braking section for decelerating or stopping the car, a generator for generating electric energy by running the car, a storage battery for storing the electric energy generated by the generator, and A fluid pressure pump that compresses fluid by running to generate pressure energy, a pressure accumulator that stores the pressure energy generated by the fluid pressure pump, a solenoid valve connected to the pressure accumulator, and an electric energy stored in the storage battery. By operating the electromagnetic valve by using the pressure control unit, the pressure energy stored in the accumulator is transmitted to the braking unit, and braking control means for driving the braking unit is provided.

According to the above configuration, the generator generates electric energy as the car travels, and the electric energy is stored in the storage battery. At the same time, as the car runs, the hydraulic pump generates pressure energy, and the pressure energy is stored in the accumulator. Then, the braking control means operates the solenoid valve using the electric energy stored in the storage battery. Then, the pressure energy stored in the pressure accumulator is transmitted to the braking unit, thereby driving (braking or releasing the braking) the braking unit.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. First, a schematic configuration of an elevator in which the elevator braking device of the present invention is installed will be described. As shown in FIG.
Are connected to both ends of the rope 4 wound around the sheave 3. A braking device 5 is provided below the sheave 3, and the braking device 5 decelerates or stops the car 1 with the rope 4 interposed therebetween.

(Embodiment 1) FIG. 1 shows a schematic configuration of an elevator braking device according to Embodiment 1 of the present invention. In the present embodiment, an electromagnetic actuator is used to clamp the rope and perform braking. That is, the elevator braking device 5a of the present embodiment includes a braking unit 11 including the electromagnetic actuator 10 and the braking unit 1
1 and a roller unit 13 as main components.

The braking unit 11 includes a braking member 20 fixed in a hoistway (not shown), and a braking member 21 driven by the electromagnetic actuator 10 and moved in the left and right directions in the figure. The electromagnetic actuator 10 is a coil 2
2 and a yoke 23, and a movable element 24 integrally connected to the braking member 21 passes through the center of the coil 22 and the yoke 23. The mover 24 is provided with a plate-like member 24a at an intermediate portion, and a spring 25 is interposed between the plate-like member 24a and the yoke 23, so that the plate-like member 24a
That is, the mover 24 is urged by the spring 25 rightward in the figure.

The controller 12 comprises a control unit 26 for controlling the electromagnetic actuator 10 by inputting an elevator operation command, a car speed, and the like, and a storage battery unit 27 as energy storage means.

The roller section 13 includes two rollers 28 and 29 arranged so as to sandwich the rope 4, and a rotary generator 30 connected to a shaft of the roller 28 and driven to rotate by the roller 28. . This rotary generator 30
Is energy conversion means for converting kinetic energy generated by rotation of the roller 28 into electric energy.

In the above configuration, when the elevator is stopped, the electromagnetic actuator 10 is not energized. In this state, in the braking section 11, since the movable element 24 is urged rightward in the drawing by the pre-compressed spring 25, the rope 4 is sandwiched between the braking members 20 and 21, and the braking state is maintained. .

When the elevator is started, the coil 22 is energized in accordance with the elevator operation command, and the movable element 24 generates an attractive force that overcomes the force of the spring 25.
Moves together with the braking member 21 to the left in the figure. Thereby, the braking state is released.

The speed of the car is input to the controller 12, and when an abnormality such as an overspeed of the car is detected, the power supply to the electromagnetic actuator 10 is stopped so that the same operation as in the above-described elevator stop state is performed. Then, the rope 4 is sandwiched between the braking members 20 and 21, and the car quickly decelerates or stops. When the abnormality has been resolved, the controller 12 resumes the energization of the electromagnetic actuator 10 and the braking member 2
The pinching of the rope 4 by 0 and 21 is released, and normal operation of the elevator is enabled.

The roller 28 of the roller section 13 is in contact with the rope 4, and when the rope 4 is moving upward or downward during the operation of the elevator, the roller 28 always rotates. Continues power generation. Then, the electric energy generated by the rotary generator 30 is stored (charged) in the storage battery unit 27 of the controller 12. The storage battery unit 27 mainly stores electric energy necessary for driving the electromagnetic actuator 10.

A switch 31 is provided between the rotary generator 30 and the storage battery unit 27. When the electric energy of the storage battery unit 27 falls below a predetermined level, the switch 31 is turned on to charge the storage battery unit 27. . When the electric energy of the storage battery unit 27 exceeds the predetermined level and charging is completed, the switch 31 is turned off.

According to the present embodiment, electric energy necessary for braking and braking release during elevator operation is stored in the storage battery unit 27, so that there is no need to supply power to the braking device 5a. This facilitates mounting of the braking device on the elevator.

(Embodiment 2) FIG. 2 shows a schematic configuration of an elevator braking device according to Embodiment 2 of the present invention. In the present embodiment, a fluid pressure actuator is used to clamp the rope and perform braking. That is, the elevator braking device 5b of the present embodiment includes the braking unit 11b including the fluid pressure actuator 40 and the braking unit 1
A controller 12b for controlling the motor 1b, a roller unit 13b, and a fluid pressure circuit 41 are main components.

The braking section 11b includes a braking member 20 fixed in a hoistway (not shown) and a hydraulic actuator 40.
Brake member 21 driven by and moved in the left-right direction in the figure
It is composed of The fluid pressure actuator 40 is
A cylinder 41 and a piston 42 are provided in the cylinder 41, and the piston 42 is integrally connected to the braking member 21. The inside of the cylinder 41 is partitioned into a right chamber and a left chamber by a piston 42, a high-pressure fluid is guided to the right chamber, and a spring 43 is provided in the left chamber to urge the piston 42 rightward in the drawing. I have.

The fluid pressure circuit 41 includes a tank 44, a fluid pressure pump 45, an unload valve 46, and a relief valve 47.
, An accumulator 48 and a normally closed two-way solenoid valve 49
, A normally open two-way solenoid valve 50 and an accumulator 48
And a pressure detector 51 for monitoring the pressure of the pressure. The fluid pressure pump 45 is connected to the shaft of the roller 28 and is driven to rotate by the rotation of the roller 28. The fluid pressure pump 45 and the accumulator 48 are connected by a flow path via an unload valve 46, and a relief valve 47 is provided in the middle of the flow path.
Is attached. The right chamber of the accumulator 48 and the fluid pressure actuator 40 are connected to the two-way solenoid valve 49 by a flow path, and the right chamber of the fluid pressure actuator 40 is connected to the two-way solenoid valve 50 and the tank 44 by a flow path. . A pressure detector 51 is provided in the flow path near the accumulator 48.
The detection result of the pressure detector 51 is input to the controller 12b.

The controller 12b receives an elevator operation command, a car speed, and the like as inputs, and controls a unload valve 46, solenoid valves 49 and 50, and a storage battery unit 27.
b.

The roller portion 13b is composed of two rollers 28 and 29 arranged so as to sandwich the rope 4,
, And a rotary generator 30 that is driven to rotate by the rotation of the roller 28.

In the present embodiment, the fluid pressure pump 4
5 and the rotary generator 30 constitute an energy converter. The accumulator 48 is a pressure accumulator, and the storage battery unit 27b is a storage battery, both of which constitute energy storage means.

In the above configuration, when the elevator is stopped, the solenoid valves 49 and 50 are not energized. In this state, the solenoid valve 49 is closed and the solenoid valve 50 is open. Accordingly, the high-pressure fluid stored in the accumulator 48 is not guided to the right chamber of the fluid pressure actuator 40, so that the piston 42 is pressed by the pre-compressed spring 43 rightward in the drawing. As a result, the rope 4 is sandwiched between the braking members 20 and 21, and the braking state is maintained.

When the elevator is started, the controller 12b sends a solenoid valve 49,
50 is energized. As a result, the solenoid valve 49 opens and the solenoid valve 50 closes, so that the high-pressure fluid stored in the accumulator 48 is guided to the right chamber of the fluid pressure actuator 40, and a force that overcomes the force of the spring 43 is applied to the piston 42. Then, the piston 42 moves to the left in the figure together with the braking member 21. As a result, the braking state is released. In this state, the elevator is operated.

When the controller 12b detects an abnormality such as an excessive speed of the car during the operation of the elevator, the solenoid valve 49 and 50 are stopped, and the solenoid valve 49 is closed and the solenoid valve 50 is opened. The high-pressure fluid in the right chamber of the fluid pressure actuator 40 is discharged to the tank 44 via the solenoid valve 50. Then, the piston 42 presses the braking member 21 rightward in the figure by the pre-compressed spring 43, the rope 4 is sandwiched between the braking members 20, 21, and the car is quickly decelerated or stopped.

The roller 28 of the roller section 13 is in contact with the rope 4. When the rope 4 is moving upward or downward during elevator operation, the roller 28 always rotates and the rotary generator 30 always rotates. Continue generating electricity. Then, the electric energy from the rotary generator 30 is charged in the storage battery unit 27b of the controller 12b. A switch 31 is provided between the storage battery unit 27b and the rotary generator 30, and the switch 31 has the same function as in the first embodiment.

Similarly, the hydraulic pump 45 is constantly driven via the roller 28. However, when the value of the pressure detector 51 is higher than the set value, the fluid pressure pump 45 is brought into the unload state by the unload valve 46. For this reason, the loss at the time of normal car running can be suppressed. Pressure detector 5
Only when the value of 1 is lower than the set value, the unload valve 46 is turned on and the pressure energy is stored in the accumulator 48.

According to this embodiment, the energy required for releasing the braking during the operation of the elevator is stored.
There is no need to supply power to the braking device 5b. Further, even in the case of the fluid pressure drive, a motor for driving the fluid pressure pump 45 becomes unnecessary. This facilitates the work of attaching the braking device 5b to the elevator.

(Embodiment 3) FIG. 3 shows a schematic configuration of an elevator braking device according to Embodiment 3 of the present invention. This embodiment is different from the second embodiment in the structure of the fluid pressure actuator. Other configurations are the same as those in the second embodiment.

Here, only different points will be described. That is, in the elevator braking device 5c of the present embodiment, in the fluid pressure actuator 40b, the spring 43 is provided in the right chamber in the cylinder 41 partitioned by the piston 42, and the high-pressure fluid is guided to the left chamber. .

In the above configuration, since the control of the solenoid valves 49 and 50 is the same as that of the second embodiment, the solenoid valves 49 and 50 are not energized when the elevator is stopped. For this reason, the high-pressure fluid stored in the accumulator 48 is not guided to the left chamber of the fluid pressure actuator 40b, and the piston 4
2 is urged leftward in the figure, and the braking is released. This state is maintained during normal operation.

When an abnormality such as an overspeed of the car is detected, the controller 12 energizes the solenoid valves 49 and 50 so that the high-pressure fluid in the accumulator 48 is supplied to the fluid pressure actuator 40.
When guided to the left chamber b, the piston 42 overcomes the force of the spring 43 and presses the braking member 21 rightward in the drawing, thereby braking the rope 4 between the braking members 20 and 21. When the braking is released, the power supply to the solenoid valves 49 and 50 is stopped. As a result, the high pressure fluid in the left chamber of the fluid pressure actuator 40b is discharged to the tank 44 via the solenoid valve 50, and the piston 4
2 is moved leftward in the figure by the spring 43, and the braking state is released.

According to the present embodiment, the energy required for the braking operation during the elevator operation is stored.
There is no need to supply power to the braking device 5c. Further, even in the case of the fluid pressure drive, a motor for driving the fluid pressure pump 45 becomes unnecessary. This facilitates the work of attaching the braking device 5c to the elevator.

It is to be noted that the present invention relates to a braking device for an elevator, which comprises means for converting the operation of a car into energy.
Since the present invention relates to a braking device having an actuator operated by the energy, the arrangement, means, and the like are not limited to the drawings. That is, the braking device may have another braking device structure such as a guide rail (not shown). The arrangement of the braking device may be, for example, a car other than that illustrated.

[0041]

As described above, according to the present invention,
Energy generated by running the car is stored in the energy storage means of the storage battery or accumulator, and when necessary, the stored energy is used to perform braking or braking release. Power supply is not required, and mounting of the braking device on the elevator is facilitated.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an elevator braking device according to a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of an elevator braking device according to a second embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of an elevator braking device according to a third embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of an elevator.

[Explanation of symbols]

 Reference Signs List 1 car 2 counterweight 3 sheave 4 rope 5, 5a, 5b, 5c elevator brake device 10 electromagnetic actuator 11, 11b, 11c brake unit 12, 12b controller 20, 21, brake member 22 coil 24 mover 26, 26b control unit 27, 27b Storage battery unit 28, 29 Roller 30 Rotary generator 40, 40b Fluid pressure actuator 45 Fluid pressure pump 48 Accumulator 49, 50 Two-way solenoid valve

Claims (3)

[Claims] A braking unit for decelerating or stopping the car;
An energy converter that converts a part of kinetic energy generated by running the car into another energy,
An elevator comprising: energy storage means for storing energy converted by the energy converter; and brake control means for controlling driving of the braking unit using the energy stored in the energy storage means. Braking device. 2. A braking unit for decelerating or stopping a car,
A generator that generates electrical energy by running the car, a storage battery that stores the electrical energy generated by the generator, and braking control means that drives the braking unit using the electrical energy stored in the storage battery. An elevator braking device, characterized in that: 3. A braking unit for decelerating or stopping the car,
A generator that generates electric energy by running the car, a storage battery that stores the electric energy generated by the generator, a fluid pressure pump that compresses fluid by running the car to generate pressure energy, and a pump that generates the pressure energy A pressure accumulator for storing the pressure energy, a solenoid valve connected to the pressure accumulator, and operating the solenoid valve using the electric energy stored in the storage battery to convert the pressure energy stored in the pressure accumulator to the pressure. An elevator braking device, comprising: braking control means for transmitting to a braking unit to drive the braking unit.