JP2015231893A - Elevator monitoring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To monitor whether or not an obstacle or a maintenance person exists on a track when a car and a balancing weight operate at the inspection work of an elevator, and to automatically stop the car when there is a risk of contact.SOLUTION: According to this embodiment, an elevator monitoring device monitors the existence of an obstacle which causes a risk of the contact of a car 12 and a balancing weight 14 in a hoistway at the inspection work of an elevator. Cameras 21, 22 for imaging images at a front of the car in a traveling direction are arranged at an upper part and a bottom part of the car. The obstacle existing on a track of the car in the traveling direction is detected from the images which are imaged by the cameras 21, 22. When there is a possibility that the obstacle contacts with the car 12 if the car continues to travel, the car 12 is automatically stop by operation control means.

Description

  Embodiments described herein relate generally to an elevator monitoring apparatus that monitors whether there are obstacles or the like on a track of a passenger car or a counterweight during an elevator inspection operation.

  When the elevator inspection operation is started, the operation mode is switched from the normal operation mode to the inspection operation mode. The normal operation mode is a mode in which the car is driven at a normal speed (rated speed) in response to a hall call or a car call. The inspection operation mode is an operation mode in which the car is moved up and down at a speed slower than the normal operation in accordance with the manual operation operation of the maintenance staff. The maintenance staff checks each part of the hoistway while operating the switch on the operation panel or the car and moving the car after switching to the inspection operation mode.

  Elevator inspection work is usually performed by two or more maintenance personnel. For example, one person gets on the car and the other person performs inspection work in the pit at the bottom of the hoistway or in various places in the hoistway.

In such inspection work, for example, a maintenance worker on the car is concerned about the safety of the other worker, and himself / herself is not aware of the approach of the counterweight, and a contact accident may occur. There was sex. On the other hand, Patent Document 1 proposes a safety device that warns maintenance personnel who are inspecting that a counterweight is approaching. In Patent Document 2, the inspection operation mode is entered at the start of the inspection work. We propose an inspection system that automatically switches to the inspection operation mode when the presence of maintenance personnel is detected in the hoistway even if you forget to change the switch.

JP 2013-170033 A JP 2012-41116 A

  However, in the conventional elevator safety system, even after switching to the inspection operation mode, if the maintenance staff operates the operation panel or the switch on the car, there are obstacles in the hoistway or other maintenance staff. Even if there is a car, you can move the car. For this reason, the occurrence of a contact accident may not be completely wiped out.

  The present invention has been made in view of the problems associated with the prior art, and when the elevator car and the counterweight operate during an elevator inspection operation, there are no obstacles or maintenance personnel on the track. It is an object of the present invention to provide an elevator monitoring device that monitors whether or not a car is automatically stopped when there is a risk of contact.

  In order to achieve the above object, according to an embodiment of the present invention, the elevator monitoring apparatus is configured to check whether there is an obstacle in the hoistway that may come into contact with a car and a counterweight during an inspection of the elevator. To monitor. Cameras are provided at the top and bottom of the car to capture images in front of the car in the direction of travel. Obstacles present on the trajectory in the traveling direction of the car are detected from the video imaged by the camera. If there is a possibility that the obstacle will come into contact with the car as the car continues to travel, the car is automatically stopped by the operation control means.

It is a figure which shows the outline | summary of the elevator with which the monitoring apparatus of the elevator by embodiment is applied. It is a side view which shows the illuminating device provided in the camera with which the monitoring apparatus of the elevator by embodiment is provided. It is a block block diagram of the monitoring apparatus of the elevator by embodiment. It is a flowchart which shows operation | movement of the monitoring apparatus of the elevator by 1st Embodiment. It is a schematic diagram which shows operation | movement of the elevator under inspection monitored by the elevator monitoring apparatus of 1st Embodiment. It is a flowchart which shows operation | movement of the monitoring apparatus of the elevator by 2nd Embodiment. It is a schematic diagram which shows operation | movement of the elevator under inspection monitored by the monitoring apparatus of the elevator of 2nd Embodiment.

Hereinafter, an embodiment of an elevator monitoring apparatus according to the present invention will be described with reference to the accompanying drawings.
(First embodiment)
FIG. 1 is a diagram illustrating an overview of an elevator to which the elevator monitoring apparatus according to the present embodiment is applied. In FIG. 1, reference numeral 10 indicates a hoistway. Reference numeral 12 indicates a car, and reference numeral 14 indicates a counterweight.

  A hoisting machine 16 and an elevator control panel 20 are installed at the top of the hoistway 10. A car 12 and a counterweight 14 are hung on a main rope 15 wound around a sheave 17 and a deflecting sheave 18 of the hoisting machine 16, and each of them is moved up and down using a guide rail (not shown) as a track (guide). It is like that.

  In the elevator monitoring apparatus according to the present embodiment, a camera 21 is provided on the upper portion of the car 12 to capture an image of the upper direction of travel when the car is raised. A camera 22 is provided at the bottom of the car 12 to take an image of the downward direction of travel when the car descends. These cameras 21, 22 detect the presence of obstacles such as scaffolds that obstruct travel on the track in the forward direction of the car 12, and the presence of maintenance personnel entering the hoistway 10 for inspection work. It is a camera to obtain the video used for

  In this embodiment, as with the car 12, a camera 23 is provided at the top of the counterweight 14, and a camera 24 is also installed at the bottom of the counterweight 14. The presence of obstacles and maintenance personnel on the traveling path of the weight 14 is detected.

  As shown in FIG. 2, in the camera 21 installed in the upper part of the car 12 so as to clearly obtain a video image in the traveling direction inside the hoistway 10, the car 28 is placed on both sides of the lens 28. Illumination device 29 for illuminating the upper part of 12 traveling directions is attached. A similar lighting device is also attached to the camera 22 at the bottom of the car 12, although illustration is omitted. An illumination device 27 is attached to both sides of the lens 26 in the camera 23 at the top of the counterweight 14, and a similar illumination device is provided in the bottom camera 24.

Here, FIG. 3 is a block diagram showing a configuration of the elevator control panel 20.
The elevator control panel 20 controls the hoisting machine 16 to control the raising / lowering operation of the car 12, and performs control for switching the operation mode of the elevator between the normal operation mode and the inspection operation mode. A mode switching control unit 41.

  The normal operation mode is a mode in which the car 12 is driven at a rated speed in response to a hall call or a car call. The inspection operation mode is a mode that enables an inspection operation in which the car 12 is manually moved up and down slowly at a low speed. As a switch for mode switching, a car inspection switch is disposed on the car 12, and a changeover switch is provided on an operation panel in the car.

In the present embodiment, the image processing unit 42 that processes images captured by the cameras 21, 22, 23, and 24 provided on the passenger car 12 and the counterweight 14 is configured by a computer provided in the elevator control panel 20. In this image processing unit 42, the distance between the obstacle detection means 43 for detecting an obstacle existing in front of the car 12 from the image taken by the cameras 21, 22, 23, and 24 and the obstacle is indicated. The distance calculating means 44 for calculating from the captured image is configured by software. As a method for calculating the distance from the video, for example, a method for calculating the distance based on the movement of the obstacle in the continuous image on the screen and the amount of displacement of the shooting position is used.
The control panel 20 transmits the captured image to the maintenance staff terminal 30 carried by the maintenance staff and the monitoring center that manages and monitors the operation of the elevator. Transmitting / receiving means 45 is provided for transmitting and receiving information necessary for the inspection work.

Next, operations and effects of the elevator monitoring apparatus according to the present embodiment will be described with reference to FIGS. 4 and 5.
FIG. 4 is a flowchart showing the processing operation of the elevator monitoring apparatus according to the present embodiment.
First, in order to perform inspection at the lowermost pit of the hoistway 10, an example of the operation when the car 12 is lowered will be described.
In step S10, when the maintenance staff switches the operation mode to the inspection operation mode, the elevator monitoring device is activated.

  In this embodiment, when the mode is switched to the inspection operation mode, prior to actually starting the operation, a notification notifying the start of operation is transmitted to the terminals 30 of all the maintenance personnel waiting in various places (step S11).

  When the maintenance person who has received the notification touches the confirmation button displayed on the screen of the maintenance person terminal 30, a confirmation signal is transmitted to the elevator control panel 20. If it is transmitted from all the maintenance staff terminals 30 (yes in step S12), the traveling of the car (down in this case) is started (step S13). If there is even one maintenance person who cannot be confirmed, the operation will not be started.

  Thus, when the operation of the elevator is started, the car 12 descends the hoistway 10 while illuminating the track, and during this time, an image below the traveling direction is captured by the camera 22 disposed below. The counterweight 14 rises, but similarly, the camera 23 captures an image in the upper direction of travel.

  While the car 12 moves, the captured image is transmitted to the elevator control panel 20, and the obstacle detection means 43 determines whether there is an obstacle on the track in the forward direction of the car 12 and the counterweight 14. Is monitored (step S14).

  The vehicle continues to travel while no obstacle is detected (step S15), and stops when the car 12 reaches the target position (step S24). In this way, the car 12 and the counterweight 14 can be moved safely while monitoring the presence or absence of an obstacle, and then an inspection operation is performed.

  The above is the monitoring processing operation when no obstacle or maintenance staff is detected on the track while the car 12 and the counterweight 14 are moving. Next, the obstacle (including maintenance staff) The operation of the monitoring device when a fault is detected will be described.

  After starting the traveling of the car 12 (step S13), the image captured by the camera 22 at the lower part of the car 12 and the camera 23 at the upper part of the counterweight 14 is processed, for example, as shown in FIG. Assume that an obstacle 50 is detected on the road 10. It is assumed that no obstacle is detected in the image of the counterweight 14 by the camera 23. In this case (yes in step S14), the distance to the obstacle 50 is calculated in real time (step S16).

  In the case of this embodiment, the distance between the car 12 and the obstacle 50 is compared with a preset deceleration start distance D1 (step S17), and the distance from the car 12 to the obstacle 50 is started to decelerate. When the distance is less than D1, the car 12 is controlled to start decelerating (step S18).

  While the deceleration operation of the car 12 continues, the distance between the car 12 and the obstacle 50 is monitored while being compared with the dangerous approach distance D2 set in advance (step S19). The car 12 is temporarily stopped (step S20). At this time, the counterweight 14 also stops. At the same time, the monitoring system temporarily stops (step S21).

  In this way, it is automatically detected that there is an obstacle 50 on the track below the moving direction of the car 12, and in this case, the car 12 is decelerated and reliably avoids contact and collision. It can be automatically paused at a position in front of it.

Until the car 12 is temporarily stopped, the video taken by the camera 22 is distributed to the maintenance staff terminals 30 of all maintenance staff engaged in the inspection work on the spot, and the maintenance staff views the video in real time. The situation can be accurately grasped by watching on.
Simultaneously with the transmission to the maintenance staff terminal 30 carried by the maintenance staff, the video is also distributed to the monitoring center, and the manager of the monitoring center can grasp the situation by viewing the video. The video is recorded and stored for a certain period.

Next, after the car 12 has stopped temporarily without coming into contact with the obstacle 50, maintenance work is performed by the maintenance staff to remove the obstacle 50 or to confirm safety.
When resuming the inspection work of the elevator, when the car 12 is lowered in the same direction as before stopping, that is, when the car 12 is further lowered (step S22), the car 12 is only used in the check operation while manually operating the operation panel or the like. Can be moved (step S23). Therefore, the inspection work can be performed while the car 12 is slowly moved at a low speed and stopped.

  On the other hand, in the case of raising the car 12 in the direction opposite to that before the temporary stop, in this case, after canceling the temporary stop of the monitoring system (step S25), the process returns to the first step S10 and described so far. In the same manner as described above, the monitoring operation on the track of the car 12 and the counterweight 14 is repeated. In this case, the car 12 ascends the hoistway 10, and during this time, the camera 21 disposed at the upper part captures an image on the trajectory above the traveling direction. The counterweight 14 will descend, but the camera 24 will take an image of the trajectory below the direction of travel and will continue to monitor whether there are any obstacles on the trajectory.

  The above is the case where the obstacle 50 is detected on the track in the traveling direction of the car 12, but the same processing is performed when the obstacle is detected on the track in the traveling direction of the counterweight 14. .

(Second Embodiment)
Next, an elevator monitoring apparatus according to a second embodiment of the present invention will be described with reference to FIGS.
FIG. 6 is a flowchart showing the processing operation of the elevator monitoring apparatus according to the second embodiment. The difference from the flowchart of the first embodiment of FIG. 4 is that steps S26 and S27 are added as processing operations after an obstacle is detected on the track of the car 12 or the counterweight 14 in step S14. is there.

  Therefore, a case where the car 12 is lowered will be described as an example. When the car 12 starts traveling, the camera 22 at the lower part and the camera 23 at the upper part of the counterweight 14 take an image of the track and monitor whether there is an obstacle while processing the video.

  At this time, as shown in FIG. 7, it is assumed that maintenance personnel are performing inspection work in the lower part of the hoistway 10. If it is detected in step S14 that there is an obstacle, the image is analyzed to determine whether the obstacle is an object or a maintenance person (step S26).

  While the car 12 moves further, the distance between the car 12 and the maintenance staff is compared with the preset deceleration start distance D1 (step S17). During this time, a warning sound continues to sound at the maintenance staff terminal 30 of the maintenance staff (step S27), and the illumination is illuminated toward the maintenance staff and the warning is continued. When the maintenance staff who notices that the car 12 is approaching retreats, the process returns to step S14 and monitoring is continued.

  On the other hand, when the distance from the car 12 to the maintenance staff is equal to or less than the deceleration start distance D1, the car 12 is controlled to start deceleration (step S18). While the deceleration operation of the car 12 continues, the distance between the car 12 and the maintenance staff is monitored while being compared with the dangerous approach distance D2 set in advance (step S19). If the maintenance staff retreats during this time, the process returns to step S14, and the car continues running while continuing monitoring.

  If the maintenance staff does not evacuate and the distance to the maintenance staff reaches the dangerous approach distance D2, the car 12 is temporarily stopped (step S20). At this time, the counterweight 14 also stops. At the same time, the monitoring system temporarily stops (step S21).

  In this manner, when an obstacle is detected on the track in the traveling direction of the car 12, it is automatically determined that it is a maintenance person, and in that case, a maintenance person terminal carried by the maintenance person At 30, after the car 12 decelerates, the safety measures are doubled and tripled, such as automatically stopping at a position in front of which the contact can be surely avoided. Etc. can be surely prevented.

  The elevator monitoring apparatus according to the present invention has been described with reference to preferred embodiments. However, these embodiments are given as examples and are not intended to limit the scope of the invention. Of course, the novel apparatus, method and system described in the specification can be implemented in various forms, and various omissions, substitutions and changes can be made without departing from the spirit of the present invention. is there. The claims and their equivalents are intended to cover the embodiments or improvements thereof within the spirit of the invention.

DESCRIPTION OF SYMBOLS 10 ... Hoistway, 12 ... Ride car, 14 ... Counterweight, 15 ... Main rope, 16 ... Hoisting machine, 17 ... Hoisting machine sheep, 18 ... Warp sheave, 20 ... Elevator control panel, 21-24 ... Camera, 27 ... Lighting device, 29 ... Lighting device, 30 ... Maintenance personnel terminal

In order to achieve the above object, according to an embodiment of the present invention, the elevator monitoring apparatus is configured to check whether there is an obstacle in the hoistway that may come into contact with a car and a counterweight during an inspection of the elevator. To monitor. Cameras that capture images on a track in front of the traveling direction of the car are disposed at the top and the bottom of the car, respectively. Obstacles present on the trajectory in the traveling direction of the car are detected from the video imaged by the camera. If there is a possibility that the obstacle will come into contact with the car as the car continues to travel, the car is automatically stopped by the operation control means.

Claims (8)

An elevator monitoring device that monitors the presence or absence of an obstacle that may come into contact with a car and a counterweight in a hoistway during an elevator inspection work,
A camera that is arranged at the top and bottom of the car, respectively, and that captures images in front of the car in the traveling direction;
Obstacle detection means for detecting obstacles present on the trajectory in the traveling direction of the car from the video imaged by the camera;
An elevator monitoring device comprising: an operation control means for automatically stopping the car when there is a possibility that the obstacle comes into contact with the car as the car continues to travel. .   The obstacle detection means has a distance calculation means for calculating a distance to the obstacle from the captured image, and the operation control means approaches the obstacle with the distance exceeding a predetermined distance set in advance. The elevator monitoring apparatus according to claim 1, wherein when the vehicle is moved, the car is decelerated.   The operation control means temporarily stops the car when the distance to the obstacle is further reduced after starting a deceleration operation and exceeds a preset danger approach distance. The elevator monitoring apparatus according to 2.   The operation control means resumes the operation only in the inspection operation mode when resuming the operation in the same direction after the suspension, and resumes the operation while monitoring the obstacle when resuming the operation in the opposite direction. The elevator monitoring apparatus according to claim 3.   The obstacle detection means determines whether the obstacle is an object or a maintenance person, and if the obstacle is a maintenance person, sounds a warning sound at a maintenance person terminal carried by the maintenance person. The elevator monitoring apparatus according to any one of claims 1 to 4, characterized in that:   Cameras are provided at the top and bottom of the counterweight to capture images in front of the counterweight in the direction of travel, and obstacles are detected on the trajectory in the direction of travel of the counterweight from the images captured by the camera. The elevator monitoring device according to any one of claims 1 to 5.   When starting the operation of the elevator, the maintenance staff who is engaged in the inspection work further includes a transmission / reception means for transmitting a notification of starting the operation to all the maintenance staff terminals carried by the elevator and receiving a reply. The elevator monitoring device according to any one of claims 1 to 6, wherein operation is not resumed unless confirmation replies are received from all the maintenance staff terminals.   The transmission / reception means transmits the captured video to the maintenance staff terminal and simultaneously distributes it to a monitoring center that monitors the operation of an elevator so that the video can be viewed at both the maintenance staff terminal and the monitoring center. The elevator monitoring apparatus according to claim 7.

Images