JP2010006496A - Method and device for restoring operation of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly detect catch of a lengthy article such as a main rope, a control cable, a governor rope and a balance cable to hoistway equipment in generation of earthquake, and to automatically restore an elevator when abnormality is not detected. <P>SOLUTION: Acceleration sensors 11a, 11b are arranged near main rope ends 7a, 7b, an acceleration sensor 11c is arranged on a car, an acceleration sensor 11d is arranged near a governor 13, and an acceleration sensor 11e is arranged below the car. When any one of the main rope, the control cable, the balance cable and the governor rope is caught by the in-hoistway equipment, abnormal vibration is detected by the acceleration sensors. When abnormal vibration is not detected by any one of the acceleration sensors, the elevator is automatically restored. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a recovery operation method and apparatus when an elevator stops operation due to an earthquake or the like.

  In general, when an elevator is shut down during an earthquake, the elevator is stopped until a maintenance / inspection engineer confirms how much damage the elevator has had and whether there is an abnormality. In recent years, earthquakes have occurred frequently, and in areas where buildings are densely populated, such as urban areas, earthquake detectors operate and many elevators are put into operation suspension. At this time, maintenance / inspection technicians who have a maintenance contract carry out patrol inspections, but due to the large number of units, it takes time to respond, and elevator users in buildings and apartments are not , Forced to use the elevator.

  For example, as disclosed in Patent Document 1, at an earthquake level where almost no equipment damage occurs, a low-speed diagnostic operation is performed to check whether there is an abnormality in the elevator, and if there is no abnormality, Automatically restore the elevator. On the other hand, it is known that at an earthquake level where equipment damage is likely to occur, automatic restoration operation is avoided and a notification that earthquake restoration operation is impossible is sent to an elevator maintenance company.

  For example, Patent Document 2 proposes that when the elevator is operated at a low speed, the output of each abnormality detection sensor attached to the car is checked, and if an abnormality is not detected, automatic recovery is proposed. .

JP 2006-151678 A JP 2004-355296 A

  Patent Document 1 describes that the level of an earthquake is detected in a plurality of stages and that a control cable catch detection device is provided and is automatically restored when no catch is detected. This control cable catch detection device detects displacement of the control cable due to catch.

  However, depending on the position of the car, the length of the control cable hanging from the car fluctuates and its weight fluctuates greatly. The displacement range due to this variation must be a dead zone, and it may be impossible to detect a catch depending on the accident phenomenon. Without large displacement, it cannot be detected, and displacement in the opposite direction cannot be detected.

  In Patent Document 1, there is no disclosure about hook detection of the main rope, and abnormality detection is insufficient. As the building becomes taller, the main rope will sway due to the earthquake, and the possibility of getting caught by equipment in the hoistway will increase. For this reason, it is very important to consider the main rope being caught on the equipment in the hoistway. In particular, in high-rise elevators, there are many cases where a balancing cable is used to eliminate the imbalance in the hanging weight between the counterweight side and the car side. A breakage accident may occur.

  On the other hand, the one disclosed in Patent Document 2 is not configured to reliably detect the hook of the main rope and the hook of the balance cable. For this reason, there is a possibility that the main rope and the balance cable may be seriously damaged during the recovery operation due to the catching on the equipment in the hoistway.

  The purpose of the present invention is to suppress recovery operation in an abnormal state caused by a long object in the hoistway when the elevator is stopped due to an earthquake or the like, and the elevator is automatically operated only when it is safe. It is to provide a restoration operation method and apparatus that can be restored.

  In one aspect of the present invention, in an elevator in which a car and a counterweight are connected by a main rope and driven by a hoisting machine, a first acceleration sensor disposed at the upper part of the car, and a first acceleration sensor disposed at the lower part of the car. 2 acceleration sensors, third and fourth acceleration sensors disposed in the vicinity of the main rope ends of the members that respectively support both ends of the main rope, and a fifth acceleration sensor disposed in the vicinity of the governor. The low-speed diagnostic operation is performed, and in response to the output of any of the acceleration sensors showing a predetermined abnormal value, the elevator recovery operation is prohibited, and the outputs of all the acceleration sensors do not show the abnormal value, And when the seismic sensor does not operate, it is provided with a restoration permission means for permitting restoration of the elevator.

  In a preferred embodiment of the present invention, when the low-speed diagnostic operation is performed and all the acceleration sensor outputs do not indicate an abnormal value and the seismic sensor is activated, the seismic sensor is reset, and again Perform low-speed diagnostic operation.

  In another preferred embodiment of the present invention, the low-speed diagnosis operation is performed, and when the output of any of the acceleration sensors indicates a predetermined abnormal value, the restoration operation of the elevator is prohibited, An abnormality analyzing means based on the output of the acceleration sensor indicating an abnormal value is provided.

  In a preferred embodiment of the present invention, the low-speed diagnosis operation is one round trip.

  Further, in a preferred embodiment of the present invention, the low-speed diagnosis operation is started on condition that there are no passengers in the car and that the elevator safety device is not operating.

  According to a preferred embodiment of the present invention, an abnormality can be reliably detected no matter where an abnormality such as a long object is caught in a hoistway of an elevator that has been stopped, and is automatically restored only when it is safe. In addition to being able to operate, damage to each device can be minimized.

  Further, according to a preferred embodiment of the present invention, it is possible to identify an abnormal location of the elevator by analyzing the output of the acceleration sensor installed at each location.

  In addition, when the operation is stopped during an earthquake, the output of each acceleration sensor is collected during the low-speed diagnostic operation, and self-determination of whether or not the elevator device can be restored, so that many elevators can quickly and automatically operate after a disaster such as an earthquake. It can be recovered. Further, the abnormality detection by the acceleration sensor is also effective as an inspection work during maintenance / inspection.

  Other objects and features of the present invention will be clarified in the embodiments described below.

  Hereinafter, an elevator restoration operation method and apparatus according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an image diagram showing a schematic structure in a hoistway of an elevator restoration operation apparatus according to an embodiment of the present invention, and an abnormality for enabling restoration operation when operation is stopped due to an abnormal vibration caused by an earthquake or other external force. The arrangement structure of a detection means is shown.

  In FIG. 1, an elevator car 1 is connected to a counterweight 3 by a main rope 2 and is hung on a hoisting machine 6 via pulleys 4 and 5 that change the direction of the main rope 2, and both ends of the main rope 2 are guides. It is fixed by rope ends 7a and 7b connected to a rail (not shown). The car 1 is connected by a control cable 8 to a control circuit 9 installed in a hoistway or the like. In order to eliminate the imbalance of the weight of the main rope 2 between the car 1 and the counterweight 3, the car 1 and the counterweight 3 are connected by a counter cable 10.

  In addition, the car 1 includes a passive sensor that detects the presence or absence of passengers in the car, a car scale device, an in-car monitoring camera (none of which are shown), and detects that there are no passengers in the car 1. be able to. The rope ends 7a and 7b of the main rope and the car 1 are provided with main rope catch detection acceleration sensors 11a, 11b and 11c in order to detect the catch of the main rope on the equipment in the hoistway. That is, the ropes 7a and 7b of the main rope 2 are supported on the beam 15 at the top of the hoistway, and the acceleration sensors 11a and 11b are mounted on the beam 15 in the vicinity of the support part of the rope ends 7a and 7b, respectively. It is location. Further, since the main rope 2 suspends the car frame on which the car 1 is mounted, the acceleration sensor 11 c is placed on the upper frame 16. When the main rope 2 is caught in the hoistway at each position, the acceleration sensor 11a, 11b or 11c senses a vibration that is clearly different from the normal one. By comparing this with the frequency within the reference range, The main rope 2 can be reliably caught.

  Next, in order to detect the catch of the governor rope 12 on the equipment in the hoistway, the governor 13 is provided with a governor rope catch detection acceleration sensor 11d. That is, the acceleration sensor 11d is placed close to the beam 17 on which the governor 13 is placed. When the governor rope 12 is caught in the hoistway, the acceleration sensor 11d senses vibrations that are clearly different from normal ones. By comparing this with the frequency within the reference range, the catch of the governor rope 12 is reliably detected. it can.

  In addition, an acceleration sensor 11e is provided in order to detect the control cable 8 and the balance cable 10 being caught on the devices in the hoistway. Since the car side ends of the control cable 8 and the balance cable 10 are supported by the lower frame 18 of the car 1 as shown in the figure, an acceleration sensor 11e is provided to detect the vibration of the lower frame 18. ing. Again, when the control cable 8 or the balance cable 10 is caught in the hoistway, the acceleration sensor 11e senses a vibration that is clearly different from the normal one. Therefore, by comparing this with the frequency within the reference range, the control cable 8 or the counter cable 10 can be reliably detected.

  In this embodiment, a seismic sensor 14 capable of sensing the initial tremor is attached to the hoistway wall.

  FIG. 2 is a process flow of an elevator restoration operation method according to an embodiment of the present invention.

  The flow for automatic restoration of elevators that have been suspended due to abnormal vibration due to earthquakes and other external forces will be described. This process starts with the elevator stopped at the nearest floor due to an abnormal vibration caused by an earthquake or other external force. First, in step 201, it is detected that there is no passenger in the car by any of the passive sensor, car balance device, and car monitoring camera provided in the car 1. In step 202, it is confirmed whether or not the safety device is operating. If the safety device is not operating, in step 203, a one-way reciprocating low-speed diagnosis operation is performed.

  If the safety device is in operation, it is impossible to recover. Therefore, the process jumps to step 204 to stop operation, and in step 205, the output data of each acceleration sensor is analyzed to analyze the abnormal state. Thereafter, this process is terminated, and a recovery work by a maintenance engineer is awaited.

  Now, in the determination step 206 based on the low-speed diagnosis operation in step 203, it is assumed that the detection frequencies by the acceleration sensors 11a to 11e are all within a predetermined range. In this case, since it is in the range of the reference frequency, no abnormality is detected. Therefore, there is no catch of the long object on the equipment in the hoistway, and the car 1, the counterweight 3 and the equipment in the hoistway It can be determined that there is no collision. In addition, if the earthquake detector 14 does not detect the initial fine movement in step 207, the elevator permits the recovery operation by self-diagnosis in step 208 and automatically performs the recovery operation.

  If none of the acceleration sensors 11a to 11e detected an abnormality during the low-speed diagnosis operation, but the seismic sensor 14 senses initial tremor, the seismic sensor 14 is reset in step 209, and again, In step 203, low speed diagnosis operation is performed. Thereby, in the determination step 206, the long object is caught by the initial tremor of the detected earthquake again.

  On the other hand, if any of the acceleration sensors 11a to 11e detects an abnormality during the low-speed diagnosis operation, it is determined that automatic recovery is impossible as in the case where the safety device operates. Therefore, the operation is stopped in step 205, and the output data of each acceleration sensor is analyzed in step 206 to analyze the abnormal state. Thereafter, this process is terminated, and a recovery work by a maintenance engineer is awaited.

  In this embodiment, 2: 1 roping is described, but the same effect can be expected even in 1: 1 roping. In this embodiment, only an earthquake is described, but it is also effective as an inspection operation.

It is an image figure which shows the schematic structure in the hoistway of the restoration operation apparatus of the elevator by one Example of this invention. It is a processing flow of the restoration operation method of the elevator by one Example of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Car, 2 ... Main rope, 3 ... Balance weight, 4, 5 ... Pulley, 6 ... Hoisting machine, 7a, 7b ... Rope end, 8 ... Control cable, 9 ... Control circuit, 10 ... Balance cable, 11a- 11e ... acceleration sensor, 12 ... governor rope, 13 ... governor, 14 ... earthquake detector, 15, 17 ... beam, 16 ... upper frame, 18 ... lower frame.

Claims (8)

In an elevator where the car and the counterweight are connected by the main rope and driven by the hoisting machine,
A first acceleration sensor located at the top of the cage;
A second acceleration sensor located at the bottom of the car,
A third and a fourth acceleration sensor arranged in the vicinity of the main rope end of the member that respectively supports both ends of the main rope; and a fifth acceleration sensor arranged in the vicinity of the governor.
Performing a low-speed diagnostic operation, in response to the output of any of the acceleration sensors showing a predetermined abnormal value, prohibiting the recovery operation of the elevator, all the output of the acceleration sensor does not show an abnormal value, and An elevator restoration operation device comprising a restoration permission means for permitting restoration of the elevator when the earthquake sensor does not operate.   In Claim 1, when the low-speed diagnostic operation is performed, and all the outputs of the acceleration sensors do not show an abnormal value and the seismic sensor is activated, the seismic sensor is reset and the low-speed diagnostic operation is performed again. An elevator restoration operation device characterized by performing.   In Claim 1, the low-speed diagnostic operation is performed, and when the output of any acceleration sensor indicates a predetermined abnormal value, the recovery operation of the elevator is prohibited and the predetermined abnormal value is displayed. An elevator restoration operation device comprising abnormality analysis means based on an output of an acceleration sensor.   The elevator restoration operation device according to claim 1, wherein the low-speed diagnosis operation is one round trip.   2. The elevator restoration operation device according to claim 1, wherein the low-speed diagnosis operation is started on condition that there are no passengers in the car and that the elevator safety device is not operating.   The restoration of an elevator according to claim 1, further comprising a counterweight-side governor for detecting an abnormal acceleration of the counterweight and a sixth acceleration sensor installed in the vicinity of the counterweight-side governor. Driving device.   In an elevator in which a car and a counterweight are connected by a main rope and driven by a hoisting machine, a first acceleration sensor is arranged at the upper part of the car and a second acceleration sensor is arranged at the lower part of the car, and the main rope The third and fourth acceleration sensors are arranged in the vicinity of the main rope ends of the members that respectively support the both ends of the first, the fifth acceleration sensor is arranged in the vicinity of the governor, and the low-speed diagnosis operation is performed, When the output of the acceleration sensor shows a specified abnormal value, the elevator restoration operation is prohibited, and when all the acceleration sensor outputs do not show an abnormal value and the earthquake detector does not operate, the elevator restoration is allowed. An elevator restoration operation method characterized by that.   8. The low-speed diagnostic operation according to claim 7, wherein when the low-speed diagnostic operation is performed and all the acceleration sensor outputs do not indicate an abnormal value and the earthquake detector is activated, the earthquake detector is reset and the low-speed diagnostic operation is performed again. An elevator restoration operation method characterized in that:

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