JPH04365769A - Abnormal vibration detecting control device - Google Patents

Abstract

PURPOSE:To prevent worsening of operation service of an elevator and generation of an accident of confining passengers in a riding cage by avoiding unnecessary action of a governor device. CONSTITUTION:An elevator stop control part 21 for holding a riding cage in a stop condition when an abnormal vibration is detected by a vibration detecting device 10 and an elevator start control part 23 for starting the riding cage when the abnormal vibration is damped to a predetermined level or less are provided. In this way, a governor is actuated not uselessly to prevent worsening of operation service of an elevator and an accident of confining passengers in the riding cage.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormal vibration detection and control device, and more particularly to an abnormal vibration detection and control device for detecting abnormal vibrations of an elevator car and controlling activation of the car.

0002

[Prior Art] If the lifting speed of an elevator car abnormally increases beyond the rated speed, it may lead to a serious accident, and passengers may be exposed to danger. is equipped with a governor device, which is equipped with a detector that detects an abnormal increase in the elevator car's lifting speed.
．． When the wire rope is moved at three times the lifting speed, a detector detects this, the governor device is activated, and the drive motor that moves the wire rope is stopped. Then, the car is at the rated speed of 1.
When the car moves at a speed of 4 times, the detector detects this and activates the governor device, which activates the safety device installed below the car, allowing the car to stop and board safely without the risk of falling. Prevent accidents of falling baskets.

[0003] By the way, the car may shake if, for example, a drunk passenger becomes violent inside the car. The artificial abnormal vibration of the elevator that occurs in this way is temporary and caused by an impulse.
Since the abnormal vibration will subside immediately, it is undesirable for the detector to detect this abnormal vibration, activate the governor device, and stop the car. The same thing applies to cases where abnormal vibrations occur due to earthquakes with low seismic intensity. Therefore, it has been proposed to attach a shock absorber to the connection between the car and the governor rope, or to attach a shock absorber to the governor device itself, so as to prevent the governor device from operating due to the above-mentioned abnormal vibrations.

[0004] However, if, for example, the artificial abnormal vibration caused by a passenger is large and cannot be absorbed by the shock absorber, the governor device will operate, so even with this method, it is not possible to completely discriminate the abnormal signal.

[0005] On the other hand, Utility Model Application No. 61-189074
When abnormal vibrations, including earthquakes, are detected, the abnormal vibration detection device detects the abnormal vibrations and issues an alarm within the car before the governor device operates, and also guides the car to the nearest floor and stops. Disclosed.

[0006]

[Problems to be Solved by the Invention] According to the abnormal vibration detection device according to the above disclosure, most abnormal signals are detected before the governor device is activated, and an alarm is issued within the car or the car is stopped. can be guided to the nearest floor and stopped. Therefore, it is possible to prevent the elevator car from stopping due to activation of the governor device that has erroneously detected abnormal vibrations, thereby preventing passengers from being trapped in the elevator car and from degrading the elevator service. However, if the car is started while abnormal vibrations are occurring, for example due to the passengers inside the car being exposed to it, the abnormal vibrations will be superimposed on the car's activation, resulting in a large acceleration. Governor device may operate. Once the governor device is activated, the elevator becomes unusable until restoration work is completed, reducing elevator service and trapping passengers in the car.

The present invention has been made in view of the current state of abnormal vibration detection devices of this type as described above, and its purpose is to avoid unnecessary operation of the governor device.
An object of the present invention is to provide an abnormal vibration control device capable of preventing deterioration of elevator service and trapping of passengers in a car.

[0008]

[Means for Solving the Problems] The object is to provide a vibration detection means for detecting abnormal vibrations of an elevator car, and when the vibration detection means detects abnormal vibrations of the elevator car,
a stopping means for holding the car in a stopped state; a broadcasting means that is activated upon detection of the abnormal vibration by the vibration detecting means to notify the occurrence of abnormal vibration in the car; and after a predetermined period of time has elapsed since the notification. This is achieved by adopting a configuration including a start control means that starts the car after confirming that the abnormal vibration has been attenuated to a predetermined level or less.

[0009]

[Operation] With this structure, when the vibration detecting means detects abnormal vibrations in the car, the stopping means holds the car in a stopped state, and at the same time, the broadcasting means is activated to eliminate abnormal vibrations in the car. The occurrence will be reported. When a predetermined period of time has elapsed since the notification by this broadcasting means and it is confirmed that the abnormal vibrations that have occurred have attenuated to a predetermined level or less, the activation control means is activated to start the car that had been stopped. will be carried out. Unless the abnormal vibration is attenuated to a predetermined level or less, the activation control means will not start the car, the car will be kept in a stopped state, and the car will not be activated until the abnormal vibration has decreased to a predetermined level or less. is started.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. Here, FIG. 1 is a block diagram showing the configuration of the main part of the embodiment, FIG. 2 is a flowchart showing the operation of the embodiment, FIG. 3 is an explanatory diagram showing the overall structure of an elevator in which the embodiment is incorporated, and FIG. FIG. 2 is an explanatory diagram of a vibration detection device according to an embodiment.

In FIG. 3, reference numeral 25 denotes a hoistway, and a machine room 26 is provided in the upper part of this hoistway 25. A wire rope 3 is connected to a groove wheel 5 of a hoisting machine (not shown) disposed in the machine room.
is suspended, and a car 1 is connected to one end of this wire rope 3, and a counterweight 2 is connected to the other end via a deflection wheel 6. Therefore, when a hoisting machine (not shown) is driven, the groove wheel 5 rotates, and the car 1 is configured to move up and down within the hoistway 25.

On the other hand, a governor rope 7 is connected to the car 1, and this governor rope 7 connects a groove wheel 8 for the governor device located in the machine room 26 and a weight pulley located at the bottom of the hoistway 25. The governor rope 7 is wound around a groove wheel 9 and moves in synchronization with the movement of the car 1. Mounted on the ceiling plate of the car 1 are a vibration detecting device 10 as a vibration detecting means, and a control device 20 comprising a stopping means, a broadcasting means, and a starting control means.

The vibration detection device 10 is housed in a case 11 as shown in FIG.
1b is fixed on the ceiling plate of the car 1. Inside the case 11, a holding shaft 12b is fixed at right angles to the side plate 11c at a central position on one end side of the side plate 11c, which is perpendicular to the bottom plate 11b.
A support shaft 12a is fixed parallel to b. One end of the detection rod 14 is rotatably engaged with the holding shaft 12b,
A disk-shaped weight 15 is slidably inserted into the detection rod 14, and this weight 15 is slid to a predetermined position on the detection rod 14 and fixed at that position by a screw 16. One end of a spring 13 is fixed to the other end of the detection rod 14.
The other end of the spring 13 is fixed to the support shaft 12a.

An actuating body 17 has an actuating surface 17H parallel to the bottom plate 11b at the connecting end of the detection rod 14 and the spring 13.
A switch 18 having an actuating piece 18a is fixed to the case 11 at a position facing the actuating body 17, and a relay 19 driven by the operation of the switch 18 is fixed inside the case 11. .

Note that in the vibration detection device 10, the detection rod 14
Adjust the position of the weight 15 above to adjust the detection sensitivity in response to aging of the elevator, or adjust the detection sensitivity to operate sensitively to earthquakes at the time when an earthquake is expected to occur. is becoming possible.

Since the vibration detection device 10 has such a configuration, when the case 11 fixed to the car 1 vibrates along with the vibration of the car 1, vibrations occur within the case 11 in the vertical direction along the hoistway 25. The disposed spring 13 vibrates, and the vibration of the spring 13 causes the detection rod 14 to move toward the holding shaft 12b.
When the vibration of the car 1 exceeds a predetermined level, the operating surface 17H of the operating body 17 pushes the operating piece 18a of the switch 18.

On the other hand, as shown in FIG.
A control device 20 is connected to 0 so that signals can be sent and received,
This control device 20 includes an elevator stop control section 21 as a stop means, a broadcast section 22 as a broadcast means, and an elevator start control section 23 as a start control means. The vibration detection device 10 is connected to an elevator stop control section 21.
and a broadcast section 22, and an elevator start control section 23 is connected to the elevator stop control section 21. Here, the elevator stop control unit 21 requests the vibration detection device 10 to detect vibrations of the car 1 at a predetermined period, and upon this request, an abnormal vibration detection signal is input from the vibration detection device 10 that performs vibration detection. Then, the elevator stop control section 21
has a function of stopping the operation of the car 1 and transmitting a normal signal to the elevator start control section 23 if no abnormal vibration detection signal is input. Further, when the abnormal vibration detection signal is input from the vibration detection device 10, the broadcasting section 22
It has a function to notify the occurrence of abnormal vibrations. The elevator start control section 23 has a function of performing elevator start control when receiving a normal signal from the elevator stop control section 21, and canceling elevator start control when a normal signal is not transferred.

Next, the operation of the embodiment configured as described above will be explained with reference to FIG.

For example, when a drunk passenger becomes violent inside the car 1 and vibrations are generated in the car 1, the spring 13 of the vibration detection device 10 fixed to the ceiling of the car 1 vibrates, causing the vibration to occur. In synchronization with the vibration of the spring 13, the detection rod 14 to which the weight 15 is attached reciprocates around the holding shaft 12b, and vibrates in the vertical direction that is the vibration direction of the car 1. When this vibration continues beyond a predetermined level, the operating surface 17H of the operating body 17 pushes the operating piece 18a of the switch 18, turning the switch 18 ON. When the switch 18 is turned on, the relay 19 is energized and an abnormal vibration detection signal is input from the vibration detection device 10 to the elevator stop control section 21 and the broadcast section 22.

Explaining along the flowchart of FIG. 2, it is determined in step S1 whether or not the elevator is stopped, and if this determination is YES, step S2 is performed.
Then, the elevator stop control unit 21 detects vibration detection device 1.
Based on the abnormal vibration detection signal from 0, it is determined whether or not abnormal vibration has been detected, and the determination in step S2 is YES.
If so, in step S3, the elevator start control section 23 to which the normal signal from the elevator stop control section 21 is not input stops the start control of the car 1, and the operation of the elevator is prohibited. On the other hand, if the determination in step S2 is NO, a normal signal is transferred from the elevator stop control device 21 to the elevator start control section 23.
Proceeding to step S9, the elevator is normally started.

Returning to step S3, when the operation of the elevator is prohibited by the elevator start control unit 23 in step S3, the process proceeds to step S4, and the speaker installed in the car 1 emits the message "There is currently an abnormality in the car. Vibrations are occurring and service has been suspended to prevent danger.Please wait for a while until the abnormal vibrations subside.'' Next, it is determined in step S5 whether 5 seconds have passed since this notification, and if the determination in step S5 is YES, the process advances to step S6, in which the vibration detection device 10 is activated in response to a request from the elevator stop control section 21. Detect vibration of car 1.

[0022] The process then proceeds to step S7, in which it is determined whether the abnormal vibration that has occurred has been attenuated to a level below a preset level. Judgment in step S7 is YES
If S, the process advances to step S8, where a normal signal is transferred from the elevator stop control section 21 to the elevator start control section 23, and at step S9, the elevator start control section 23 starts the elevator and starts the car 1. Start. If the determination at step S7 is NO, the process returns to step S4 and the operations from step S4 to step S7 are repeated.

In this way, according to the embodiment, the operation of the car 1 is always stopped when abnormal vibration occurs.
When abnormal vibrations are applied to the car 1, malfunction of the governor device due to starting of the car 1 is completely prevented. Therefore, the governor device malfunctions,
This prevents passengers from being trapped in car 1 and from degrading elevator service.

[0024]

As described in detail above, in the present invention, when the vibration detecting means detects abnormal vibration of the car, the stopping means is activated to hold the car in a stopped state, and the broadcasting means is used to stop the car. The system notifies the generation of an abnormal signal, and after a predetermined period of time has elapsed since the notification, the car is activated by the activation control means after confirming that the abnormal vibration has attenuated to a predetermined level or less. This completely prevents the governor device from malfunctioning due to the car starting when abnormal vibration occurs. Therefore, according to the present invention, passengers will not be trapped in the car due to malfunction of the governor device, and elevator service will not be degraded.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of essential parts of an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing the overall configuration of an elevator incorporating an embodiment of the present invention.

FIG. 4 is a perspective explanatory diagram showing the configuration of a vibration detection device according to an embodiment of the present invention.

[Explanation of symbols]

1 Cart 2 Counterweight 3 Wire rope 5. Ditch wheel 6 Deflection car 7 Governor rope 10 Vibration detection device 11 Case 13 Spring 14 Detection rod 20 Control device 21 Elevator stop control section 22 Broadcasting Department 23 Elevator start control section

Claims (1)

[Claims] 1. Vibration detection means for detecting abnormal vibrations of an elevator car; stopping means for holding the car in a stopped state when the vibration detection means detects abnormal vibrations of the car; broadcasting means that is activated upon detection of the abnormal vibration by the detection means and reports the occurrence of abnormal vibration in the car; and after a predetermined period of time has elapsed since the notification, the abnormal vibration is attenuated to a predetermined level or less. 1. An abnormal vibration detection control device, comprising: activation control means that activates the car after confirming that the car is activated.