JPH0967071A - Operating device in abnormal time of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operating device in the abnormal time of an elevator, capable of making a car safely arrive at a target stage without requiring once stop of the car when the acceleration to be applied to the car exceeds the specified value. SOLUTION: An operating device in the abnormal time of an elevator is composed of an acceleration detecting means 15 for detecting the acceleration to be applied to a car 4, and a speed control means 16 for switching the traveling speed of the car 4 to the low-speed side when the detected value of the acceleration detecting means 15 exceeds the specified value, the acceleration is detected by the acceleration detecting means 15 in abnormal vibration, and the car 4 is made to travel at low speed by control of the speed control means 16. Therefore, passengers in the car does not worry about the car operation, and the car can be made to arrive at the target stage in a relative short time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator abnormal time operation system for controlling a car when a large acceleration is applied due to abnormal vibration while the car is running.

[0002]

2. Description of the Related Art Conventionally, as disclosed in, for example, Japanese Unexamined Patent Publication No. 4-365789, an acceleration sensor for detecting an acceleration applied to a car is provided, and when the detected value of the acceleration sensor exceeds a predetermined value, the car is There has been proposed an elevator abnormal time operation device that temporarily stops at the nearest floor, pauses until the acceleration becomes a predetermined value or less, and then restarts the car. In this conventional abnormal operation device, for example, when a passenger is violent in a running car and a large acceleration is applied to the car due to abnormal vibration, the car is temporarily stopped at the nearest floor and the acceleration is equal to or less than a predetermined value. By resting until
Since the governor for controlling the car can be prevented from malfunctioning, the car does not need to stop suddenly.

[0003]

By the way, in the above-mentioned conventional elevator abnormal operation device, when the acceleration applied to the running car exceeds a predetermined value, the car is temporarily stopped at the nearest floor, and then the above-mentioned Since there is a rest until the acceleration of the car falls below a predetermined value, there is a problem that not only passengers in the car feel uneasy about driving the car during this rest, but it also takes a long time for the car to reach the destination floor.

The present invention has been made in view of the actual situation in the prior art as described above, and an object thereof is not to temporarily stop the car when the acceleration applied to the car during traveling exceeds a predetermined value. Another object of the present invention is to provide an abnormal elevator operation device that can safely reach the destination floor.

[0005]

In order to achieve the above object, the present invention has an acceleration detecting means for detecting the acceleration applied to the car of an elevator, and the detected value of the acceleration detecting means exceeds a predetermined value. At this time, in the elevator abnormal time operating device that performs the control operation of the car, when the detection value of the acceleration detection means exceeds a predetermined value, the traveling speed of the car is switched to the low speed side, and the detection value of the acceleration detection means. Is less than or equal to a predetermined value, speed control means for switching the traveling speed of the car to the high speed side is provided.

[0006]

Since the present invention is configured as described above, when the acceleration applied to the car during traveling is less than the predetermined value, the car is driven at the high speed side traveling speed, and the predetermined value is applied to the car during traveling. When an excessive acceleration is applied, this acceleration is detected by the acceleration detecting means, and the traveling speed of the car is switched to the low speed side by the speed control means to prevent the governor for governing the car from malfunctioning. As a result, the car can be continuously driven to reach the destination floor without the need to temporarily stop the car, and at the same time, the safety of the elevator can be ensured because the car is traveling at a low speed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an elevator abnormal time operating system of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of an elevator abnormal operation device of the present invention, FIG.
Is a characteristic diagram of the elevator car speed and acceleration during normal operation, and FIGS. 3 and 4 are characteristic diagrams of the car speed and acceleration when acceleration is applied to the running car. The elevator shown in FIG. And a main rope 3 wound around a sheave 2 directly connected to the AC motor 1,
A car 4 and a counterweight 5 connected to both ends of the main rope 3, a loop-shaped governor rope 6 connected to the car 4 via a connector 7, and a cage adjustment around which the upper end of the governor rope 6 is wound. It has a governor 8 for speed. The drive device 9 for driving the car 4 includes a converter circuit 11 for once converting the AC power supplied from the AC power supply 10 into a DC current, an inverter circuit 12 for converting the DC current into a predetermined AC power, and The capacitor 13 is provided between the converter circuit 11 and the inverter circuit 12 and rectifies the DC power, and the AC motor 1 is supplied with predetermined AC power from the inverter circuit 12.

The abnormal-time operation device 14 of the present embodiment shown in FIG. 1 includes an acceleration detecting means 15 for detecting the acceleration applied to the car 4, and a detected value of the acceleration detecting means 15 exceeds a predetermined value. , The traveling speed of the car 4 is switched to the low speed side,
When the detected value of the acceleration detecting means 15 is less than or equal to a predetermined value,
Speed control means 1 for switching the traveling speed of the car to the high speed side
It consists of 6.

The speed control means 16 has a first signal contact 20A and a second signal contact 20B, and sets a speed setting circuit 20 for setting the traveling speed of the car 4 and a setting of the speed setting circuit 20. A speed command circuit 21 that outputs a speed command of the high speed running command or the low speed running command of the basket car 4, and an inverter circuit 12 based on the speed command.
And a pulse control circuit 22 for controlling the operation of the drive unit 9. In the speed setting circuit 20 described above, when both the first signal contact 20A and the second signal contact 20B are closed, the traveling speed of the car 4 is set to the high speed side, for example, 60 m / min, while the first When only the signal contact 20A is closed and the second signal contact 20B is opened, the traveling speed of the car 4 is set to the low speed side, for example, 30 m / min.

The acceleration detecting means 15 described above includes an acceleration sensor 23 provided on the car 4 and the acceleration sensor 23.
When the detected value detected in 1 exceeds a predetermined value, for example, 250 gal, the acceleration determination circuit 24 outputs a low speed setting command for switching the traveling speed of the car 4 to the low speed side to the speed setting circuit 20.

In this embodiment, the car 4 as shown in FIG. 2 is operated at normal times when no acceleration is applied to the car 4 during traveling.
It is designed for normal operation. That is, when a passenger gets in the car 4 and operates a destination floor registration button (not shown) in the car 4, the signal contact 20 of the speed setting circuit 20
Both A and 20B are closed and the running speed of the car 4 is 60 per minute.
The pulse control circuit 22 controls the gate of the inverter circuit 12 according to the speed command from the speed command circuit 21. As a result, the car 4 is activated at the point A in FIG. 2, the car 4 is accelerated from the point A to the point B, reaches the set speed at the point B, and the high speed operation of 60 m / min is performed. Next, when the deceleration command for the car 4 is output at the point C as the car 4 approaches the destination floor, the car 4 is decelerated from the point C to the point D, and then the car 4 is moved to the destination floor at the point D. Stop.

Further, when the car 4 is running and the passengers are violent, and the car 4 is accelerated due to abnormal vibration, as shown in FIG.
As shown in, the control operation of the car 4 is performed. That is, while the car 4 is traveling at a high speed of 60 m per minute at the above set speed from the point B in FIG. 3, acceleration starts to be applied to the car 4 at the point E, and the acceleration sensor 23 detects acceleration exceeding 250 gal at the point F. In this case, the traveling speed of the car 4 is set to 30 m / min by outputting a low speed setting command from the acceleration determination circuit 24 and opening the second signal contact 20B.
As a result, the car 4 decelerates to reach the above set speed at point G, and the car runs at a low speed of 30 m / min. Next, as the car 4 approaches the destination floor, a deceleration command for the car 4 is output, so that the car 4 stops at the destination floor at point H.

Further, when abnormal vibration is detected in the car 4 and the car 4 is traveling at a low speed of 30 m / min, when there is a large remaining travel distance to the destination floor, FIG.
As shown in FIG. 4, the control operation of the car 4 is performed.

That is, the acceleration sensor 23 detects an acceleration exceeding 250 gal at point F in FIG. 4, and from the point G in FIG.
When the traveling speed of the car 4 is 30 m / min, the traveling distance to the destination floor is a certain distance, for example, 10 m or more, after a certain time limit from the point G in FIG. 4, for example, 5 seconds later.
When the acceleration sensor 23 detects the acceleration of the car 4 again at the point H, and the detected value is a predetermined value, for example, 50 gal or less, a high speed setting command is output from the acceleration determination circuit 24 and the second signal contact 20B is closed. As a result, the traveling speed of the car 4 is set to 60 m / min. As a result, the car 4 accelerates and I
At the point, the set speed is reached and the vehicle runs at a high speed of 60 m / min. Then, as the car 4 approaches the destination floor, a deceleration command for the car 4 is output, so that the car 4 stops at the destination floor at point D.

In the embodiment thus constructed, when the car 4 in motion is subjected to an acceleration exceeding a predetermined value, the car 4 travels at a low speed as described above, so that the governor 8 for governing the speed of the car 4 is obtained. Since it is possible to prevent the erroneous operation of the car 4, it is possible to continuously drive the car 4 to reach the destination floor without the need to stop the car 4. At this time,
Since the car 4 travels at a low speed, it is possible to ensure the safety of the elevator.

Further, when the car travels a long distance to the destination floor, the car is made to travel at a high speed again to shorten the travel time, so that the irritation of passengers and waiting passengers at the landing can be alleviated. .

Although the traveling speed of the car 4 is set to either 60 m / min or 30 m / min by the speed setting circuit 20 in this embodiment, these traveling speeds may be changed to other speeds as required. It can also be set to the speed of.

Further, in the present embodiment, the case where the acceleration is applied while the car 4 is traveling from the point B to the point C in FIG. 3 is illustrated, but during the acceleration of the car 4 from the point A to the point B in FIG. Even when acceleration is applied due to abnormal vibration, the same effect can be obtained by decelerating from the normal traveling speed.

Further, although the rope type elevator has been exemplified in this embodiment, the present invention is not limited to this, and the same effect can be obtained also in the case of a hydraulic type elevator.

[0020]

Since the present invention is configured as described above, when the acceleration applied to the running car exceeds a predetermined value, the car is run at a low speed, so that the car does not need to be temporarily stopped, And the car can be safely arrived at the destination floor. Therefore, it is possible to avoid the passengers in the car from feeling uneasy about the car operation when the car is stopped, and it is possible to bring the car to the destination floor in a relatively short time.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of an elevator abnormal time operating system of the present invention.

FIG. 2 is a characteristic diagram of a car speed and an acceleration of an elevator at a normal time.

FIG. 3 is a characteristic diagram of a car speed and an acceleration when the car is accelerated during traveling.

FIG. 4 is a characteristic diagram of a car speed and an acceleration when the car is being accelerated and the car is traveling at a low speed and then at a high speed again.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 AC motor 4 Basket 9 Drive device 11 Converter circuit 12 Inverter circuit 13 Capacitor 14 Abnormal operating device 15 Acceleration detecting means 16 Speed control means 20 Speed setting circuit 20A, 20B Signal contact 21 Speed command circuit 22 Pulse control circuit 23 Acceleration sensor 24 Acceleration judgment circuit

Claims (3)

[Claims] 1. An abnormal operating device for an elevator, comprising acceleration detecting means for detecting an acceleration applied to a car of an elevator, and performing a control operation of the car when a detected value of the acceleration detecting means exceeds a predetermined value. When the detection value of the acceleration detection means exceeds a predetermined value, the traveling speed of the car is switched to a low speed side, and when the detection value of the acceleration detection means is less than or equal to a predetermined value, the traveling speed of the car is set to a high speed side. An abnormal elevator operation device comprising speed control means for switching to. 2. The speed control means includes a speed setting circuit for setting the traveling speed of the car, and the traveling speed of the car is set to the high speed side and the low speed side by setting the speed setting circuit according to the detection value of the acceleration detecting means. The abnormal time operation device for an elevator according to claim 1, wherein the operation device is switched to any one of the above. 3. A speed control circuit that outputs a speed command of either a high speed running command or a low speed running command of the car, in accordance with a setting of a speed setting circuit, and a speed command circuit that controls the car based on the speed command. A pulse control circuit for controlling the operation of a driving device to be driven, wherein the acceleration detecting means includes an acceleration sensor provided in the car, and the traveling of the car when the detection value detected by the acceleration sensor exceeds a predetermined value. 3. The elevator abnormal time operating device according to claim 2, further comprising: an acceleration detection circuit that outputs a low speed setting command for switching the speed to a low speed side to the speed setting circuit.