JPH11335017A - Device for passenger rescuing operation in elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for passenger rescuing operation in an elevator, which can limit a descending speed of a car during the rescue operation for a passenger. SOLUTION: An opening time setting part 141 and a closing time setting part 142 are provided in a timer contact circuit 14 for setting a time by which a power for releasing a brake device 4 from its braking condition, in order to optionally set a period with which braking and releasing of the brake device 4 is repeated. The period with which braking and releasing of the brake device 4 is set, and which is determined in accordance with a set time Tca of the closing time setting part 142 and a set time Toa of the opening time setting part 142 is set to be smaller than an inherent vibration period Tiv which is determined in accordance with a spring constant of a rope 7 and a mass of a car 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passenger rescue operation device for an elevator which rescues passengers by releasing a brake and driving a car down in an emergency.

[0002]

2. Description of the Related Art In general, when a car stops at an intermediate floor and cannot be operated automatically due to a failure of an elevator device or the like, passengers are trapped in the car and cannot get out. Is manually opened with a dedicated jig or the like, and the car is lowered to a position where it can get on and off by its own weight to rescue the passengers.

[0003]

However, in the above-described conventional passenger rescue operation, while the brake device is released, the car continues to accelerate due to the gravitational acceleration, and the descending speed becomes too fast. The impact of the car increases.

An object of the present invention is to provide a passenger rescue operation device for an elevator, which can limit the descending speed of a car during a passenger rescue operation.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is configured such that a car installed in a hoistway is raised and lowered by a driving device, and the driving device has a brake device and an electric motor. In a passenger rescue operation device for an elevator that applies an opening force to the braking device in a braking state to lower the car, the connection is intermittently connected between a power supply that applies an opening force to the braking device and the braking device. A timed contact circuit is provided.

In the elevator passenger rescue operation device according to the present invention, the timed contact circuit for interrupting the connection is provided between the power supply for applying the opening force to the brake device and the brake device as described above. By repeatedly releasing the brake device in the braking state, the car can be gradually lowered, and it is possible to restrict the car from lowering at a speed higher than necessary.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram illustrating an elevator passenger rescue operation device according to an embodiment of the present invention.
A car 8 is arranged in the hoistway 1 so as to be able to go up and down. One end of a rope 7 wound around a pulley 9 installed at the uppermost part in the hoistway 1 is connected to the car 8, and the other end of the rope 7 Is connected to a driving device 2 installed below the hoistway 1. The driving device 2 includes a winding drum 3 on which the other end of the rope 7 is mounted, a brake device 4 for holding the winding drum 3,
And a control device 6 for controlling the brake device 4 and the electric motor 5. A landing 21 where the car 8 stops is provided with a landing button 10 and a first connector 11 connected to a lead line from the power supply line of the brake device 4 and connected to the passenger rescue operation device 12 during rescue operation. Have been.

A passenger rescue operation device 12 having a second connector 16 for opening the brake device 4 by connecting to the first connector 11 includes a storage battery 13 serving as an electric power source for opening the brake device 4. , A timed contact circuit 14 that repeats the opening operation of the contact for a fixed time, and a switch 15 that is connected to the timed contact circuit 14 and that permits the repeated operation of opening and closing the contact. The timed contact circuit 14 has an open time setting unit 141 for setting the open time of the contact provided in the timed contact circuit 14, and a closed time setting unit 142 for similarly setting the closed time of the contact.

FIG. 2 shows the repetition period of the braking and releasing operations of the braking device 4 by the spring constant of the rope 7 and the car 8.
FIG. 10 is a waveform diagram showing a vertical vibration curve Va of the car 8 when the natural vibration period is set to 1/4 or less of the natural vibration period consisting of the mass of the vehicle, Sa is the switching signal of the timed contact circuit 14 at that time, and Tca is At this time, the set time of the closed time setting unit 142 and Toa indicate the set time of the open time setting unit 141.

FIG. 3 is a waveform diagram showing a vertical vibration curve Vb of the car 8 when the repetition cycle of the braking and releasing operations of the brake device 4 is set to be at least 1/4 of the above-described natural vibration cycle. , Sb indicates the open / close signal of the timed contact circuit 14 at that time, Tcb indicates the set time of the closed time setting unit 142 at that time, Tob indicates the set time of the open time setting unit 141, and Tiv indicates the measured value of the natural oscillation period. I have.

Next, the operation of the above-described elevator passenger rescue operation device will be described. During normal operation of the elevator, the control device 6 receives an input from the landing button 10 and
And the electric motor 5 is rotated, and the car 8 is raised or lowered while rotating the winding drum 3 in the winding or unwinding direction. Car 8 and platform 21
When the floor of the vehicle is at substantially the same height and is in a position where the passenger can get on and off, the motor 5 is stopped to brake the brake device 4, and a signal from the control device 6 opens a door (not shown) and a landing door of the car 8. Get passengers on and off.

Here, if a power failure occurs while the car 8 is moving up or down, or if a failure such as a failure of an elevator machine occurs, the driving of the electric motor 5 stops and the brake device 4 brakes to cause a failure. The car 8 stops at the position. At this time, if there is a passenger in the car 8, if the floor heights of the car 8 and the landing 21 are different and the door of the car 8 and the landing door cannot be opened,
Passengers cannot escape from the car 8 on their own.

In such a case, first, the second connector 16 of the passenger rescue operation device 12 is connected to the first connector 11 of the landing button 10. Thereafter, when the switch 15 of the passenger rescue operation device 12 is depressed, the operation of the timed contact circuit 14 starts, and the contact is closed for the set time Tca of the closed time setting unit 142 and for the set time Toa of the open time setting unit 141. Repeat the opening operation. Thereby, the storage batteries 13 ...
... The time contact circuit 14... The second connector 16... The circuit of the first connector 11 is formed, and the electric power from the storage battery 13 is supplied to the brake device 4. Brake device 4 at this time
Is supplied intermittently at regular intervals by the timed contact circuit 14, so that the brake device 4 also intermittently repeats opening and braking.

When the brake device 4 is released, the car 8
The winding drum 3 rotates in the feeding direction by its own weight, and the car 8 descends. However, when the set time Tca of the closing time setting unit 142 elapses, the contact of the timed contact circuit 14 opens and the storage battery 13
Since the electric power from the vehicle is cut off and the brake device 4 enters the braking state, the car 8 stops automatically. Thereafter, when the set time Toa of the open time setting unit 141 elapses, the contact of the timed contact circuit 14 is closed, the electric power from the storage battery 13 is supplied, and the brake device 4 is opened, so that the car 8 descends. As described above, since the brake device 4 repeats the opening and the braking by the timed contact circuit 14, the descent time of the car 8 is limited by the setting time Tca of the closing time setting unit 142, and the car 8 It is possible to prevent the vehicle from descending at a speed higher than necessary.

When the floor of the car 8 and the floor of the landing 21 reach the position where they can get on and off by repeating the opening and braking operations of the brake device 4, the switch 15 is opened to operate the timed contact circuit 14. Stop the car 8
And the door of the landing 21 is opened to rescue the passengers from the car 8.

As described above, the timed contact circuit 14 includes the open time setting section 141 and the closed time setting section 142 so that the cycle of the repetitive operation of braking and opening in the brake device 4 can be arbitrarily set. The descending speed of the car 8 during the rescue operation can be arbitrarily determined. Here, the brake device 4 determined by the set time Tca of the closed time setting unit 142 and the set time Toa of the open time setting unit 141
The cycle of the repetitive operation of the braking and releasing operations in
If the natural vibration period Tiv is set to be larger than the spring constant of the rope 7 and the mass of the car 8, the vertical vibration of the car 8 will increase as shown by the vibration curve Vb in the waveform diagram shown in FIG. However, the closing time setting unit 142
Is smaller than the natural vibration cycle Tiv due to the spring constant of the rope 7 and the mass of the car 8 determined by the set time Tca and the set time Toa of the open time setting unit 141. When the setting is made, the vertical vibration of the car 8 is reduced as indicated by the vibration curve Va in the waveform diagram shown in FIG. 2, and the rescue operation can be performed without adversely affecting the passengers.

FIG. 4 shows a vibration curve Fv representing the relationship between the cycle of repeating the braking and releasing operations of the brake device 4 and the strength of vertical vibration of the car 8. As can be seen from the figure, the vibration curve Fv indicates the cycle of repeating the braking and releasing operations of the brake device 4 by the natural vibration cycle Tiv due to the spring constant of the rope 7, the mass of the car 8 and the like.
Is not more than 3/4 of the natural vibration period Tiv, the vibration can be greatly suppressed as compared with the case where the natural vibration period Tiv is the same as the natural vibration period Tiv. When it is 1/4 or less, a remarkable vibration suppressing effect can be obtained.

Since the first connector 11 from which the power supply line of the brake device 4 is drawn is disposed on the landing button 10 of the landing 21, connection and operation of the rescue driving device 12 can be performed at the landing 21. The rescue operation can be easily performed even in an elevator in which the brake device 4 is arranged at the lower part of the hoistway and there is no work place at the lower part of the hoistway. Furthermore, since the storage battery 13 is used as a power supply for the rescue operation device 12, rescue operation can be performed even during a power outage.

[0019]

As described above, the elevator passenger rescue operation device according to the present invention is capable of intermittently releasing the braking of the brake device by the timed contact circuit. It is possible to prevent the vehicle from descending at the above speed and restrict the descending speed of the car during the passenger rescue operation, thereby suppressing the impact when the car stops.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an elevator passenger rescue operation device according to an embodiment of the present invention.

FIG. 2 is a waveform diagram showing vertical vibrations during a rescue operation by the passenger rescue operation device of the elevator shown in FIG.

FIG. 3 is a waveform diagram showing vertical vibrations during another rescue operation by the elevator passenger rescue operation device shown in FIG. 1;

FIG. 4 is a characteristic diagram showing a relationship between a cycle and a vibration intensity of the elevator rescue operation device of the elevator shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hoistway 2 Drive device 4 Brake device 5 Electric motor 6 Control device 8 Riding car 10 Landing button 11 First connection device 12 Passenger rescue operation device 13 Storage battery 14 Timed contact circuit 15 Switch 16 Second connection device 20 AC power supply 21 Platform 141 Open time setting unit 142 Close time setting unit Va, Vb Vibration waveform Tiv Natural vibration period

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shizuo Nishikawa 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo, Japan Inside the Hitachi Building Systems Co., Ltd. (72) Inventor Mutsuo Konno 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Stock (72) Inventor Masaaki Tamada 1070 Ma, Hitachinaka City, Ibaraki Prefecture Inside Mito Plant, Hitachi, Ltd. (72) Takayuki Hashimoto 1070 Ma, Hitachi City, Hitachinaka City, Ibaraki Mito Plant, Hitachi, Ltd. Inside

Claims (7)

[Claims] 1. A car installed in a hoistway is configured to be moved up and down by a driving device, wherein the driving device has a brake device and an electric motor, and applies an opening force to the brake device in a braking state to perform the riding. A passenger rescue operation device for an elevator that moves down a car, wherein a time-contact circuit for interrupting the connection is provided between a power supply for applying an opening force to the brake device and the brake device. apparatus. 2. The time limit contact circuit according to claim 1, wherein the time limit contact circuit has an open time limit setting section and a close time limit setting section for setting a cycle of a repetitive operation of the braking and opening operations of the brake device. Elevator rescue operation equipment to be lifted. 3. The car according to claim 1, wherein the car is configured to move up and down through a rope wound around a winding drum connected to the brake device and the electric motor,
The timed contact circuit is characterized in that the repetitive operation of the braking and releasing operations of the brake device is intermittently performed in a cycle shorter than a natural vibration cycle composed of the spring constant of the rope and the mass of the car. Passenger rescue driving equipment. 4. The vehicle according to claim 1, wherein the car is configured to move up and down via a rope wound around a winding drum connected to the brake device and the electric motor,
The above-mentioned timed contact circuit is characterized in that the repetitive operation of the braking and releasing operations of the brake device is set to not more than 3/4 of the natural vibration period comprising the spring constant of the rope and the mass of the car, and Rescue driving equipment. 5. The vehicle according to claim 1, wherein the car is configured to move up and down via a rope wound around a winding drum connected to the brake device and the electric motor,
The above-mentioned timed contact circuit, wherein the repetitive operation of the braking and releasing operations of the brake device is set to not more than 1/4 of a natural vibration period comprising the spring constant of the rope and the mass of the car, and Rescue driving equipment. 6. The device according to claim 1, further comprising a connector for connecting the brake device and the timed contact circuit, wherein the connector is disposed near a landing button provided at an elevator landing. Elevator passenger rescue operation device. 7. An elevator passenger rescue operation apparatus according to claim 1, wherein a storage battery is used as said power supply.