JPS6353111B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] This invention relates to improvements in equipment for monitoring elevators after an earthquake.

[Prior art]

Extreme care must be taken when operating elevators after an earthquake.

When a large-scale earthquake occurs, equipment and members within the hoistway may become deformed or fall off, and sometimes the counterweight may escape from its guide rail. If the car is run in such a case, it may collide with the counterweight, which is extremely dangerous.

Elevator operation during an earthquake can be explained, for example, in "Explanation of the Technical Standards for Elevators and Escalators of the Building Standards Act and its Enforcement Order" edited by the Building Center of Japan and the Japan Elevator Safety Center (March 15, 1981), published by the Japan Elevator Association, Vol.
Done as shown on page 189. Based on this, an outline of the procedure for returning the elevator to normal operation after an earthquake will be explained using the flow chart of the operation shown in FIG.

In other words, when an earthquake is detected, it is determined whether the car is running in step A, and if it is running, it is determined in step B.
to determine whether the counterweight is off the rail. If the car has not come off the rail, it is determined in step C whether the car is running in an express zone (section without a boarding area), and if it is not running in an express zone, the car is stopped at the nearest floor in step D. Open the door in step E and close the door after a predetermined time. Note that if it is determined in step A that the car is not running (stopped), the process jumps to step E. Next, in step F, the elevator is made unstartable, and in step G, an inspection is performed by a specialized maintenance person. As a result, if it is determined in step H that there is no abnormality, normal operation is returned to in step I. If there is an abnormality, it is repaired in step J and then returned to normal operation in step I.

Next, when it is determined in step B that the counterweight is off the rail, and when it is determined in step C that the car is running in the express zone, step K
Bring the basket to a sudden stop. Then, in step L, it is determined whether the magnitude of the earthquake is 150 gal or less, and if it is 150 gal or less, in step M, the basket is moved in the opposite direction to the counterweight, that is, the basket and counterweight are moved away from each other. The car will automatically operate at low speed as it heads for the nearest floor in the direction. Thereafter, steps E to J are performed. If step L determines that the magnitude of the earthquake exceeds 150 gal, step N calls to confirm whether there are any passengers in the car using the intercom. If there are no passengers in the car, steps E to J are performed. If there is a passenger in the car, use the intercom in step P to instruct the passenger to drive the car at low speed to the nearest floor in the opposite direction to the counterweight. Thereafter, steps E to J are performed.

In this way, the elevator is returned to normal operation, but since detecting the counterweight coming off the rail, etc., and operating at low speed, etc., is done automatically, it is easier to perform inspection than manual inspection. Due to the small number of items, it is difficult to be completely thorough.
Therefore, even if the counterweight is not detected to have come off the rail in step B, normal operation will not be resumed without inspection by a specialized maintenance person in step G. Furthermore, in terms of comparing the ``standard condition'' of hoistway equipment, members, etc. with the ``post-earthquake condition'' by specialized maintenance personnel, it is beyond the scope of non-specialist intervention. Therefore, even if there is a manager (who is not an expert in elevator maintenance),
The elevator cannot be returned to normal operation until a specialized maintenance worker arrives and inspects it, which can delay the rescue of passengers.

[Summary of the invention]

This invention aims to improve the above-mentioned problems. By installing an imaging device inside the hoistway and displaying the difference between image signals before and after an earthquake, it is possible to visually check the condition inside the hoistway after an earthquake. An object of the present invention is to provide a post-earthquake elevator monitoring device that enables early completion of return to operation.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG.

In the figure, 1 is the elevator machine room, 2 is the drive network wheel of the hoisting machine (driven by an electric motor) installed in the machine room 1, 3 is the deflection wheel installed on the floor of the machine room 1, and 4 is the machine room 1 is a control panel installed to control the electric motor, 5 is an elevator hoistway, 6 is a main rope wound around the net wheel 2 and the deflection wheel 3, and 7 is a main rope 6
A car frame 8 is connected to one end of the car, a car room 8 is supported by the car frame 7, and a car room 9 is suspended between the car frame 7 and the hoistway 5 for power supply and signal exchange between the control panel 4 and the car room 8. 10 is a counterweight connected to the other end of the main rope 6, 11 is a lighting lamp installed on the top of the car frame 7, and 12 is an electronic camera that also uses an image sensor and emits an image signal. 13 is a cathode ray tube that is connected to the imaging device 12 and installed in a management room or the like to receive and display the image signal; 14 is an image display device that receives an elevator operation signal 14a when operated by the manager; This is an elevator management panel that sends information to the control panel 4.

Next, the operation of this embodiment will be explained.

When an earthquake occurs, a procedure is performed to return the elevator to normal operation, as described in FIG. After the elevator is disabled in step F, the manager turns on the illumination light 11 and activates the imaging device 12 before the specialized maintenance personnel arrive.
Now, the image signal 12a in the hoistway 5 is displayed on the display 1.
3, it will be displayed as an image. While viewing this, the manager operates the elevator management panel 14 to provide the elevator operation signal 14a to the control panel 4 to drive the electric motor and operate the car at low speed. This allows the manager to know the condition within the hoistway 5, and if there is no abnormality, the elevator will be returned to normal operation.

In this way, the manager makes judgments with his eyes and brain, which allows him to confirm abnormalities and perform multi-item inspections, making it possible to resume operation in the event of an earthquake with a high level of safety.

FIG. 3 shows another embodiment of the invention.

Recently, technology has been developed in which an object is photographed by an imaging device 12 to generate an image signal 12a, features of which are extracted by a computer, and the object is recognized from the features. This is, for example, "Mechatronic System Encyclopedia" edited by the Mechatronic System Encyclopedia Editorial Committee.
(August 1, 1988) Sangyo Kenkyukai Publishing Department,
Shown on pages 485-489. This embodiment is an application of the above technology.

In the figure, 16 is a pattern recognition device that is connected to the imaging device 12 and extracts features from the image signal 12a and generates a feature signal, 17 is a storage device that stores the feature signal, and 18 is an output of the pattern recognition device 16 and a storage device 17. 19 is a difference display that displays the output of the pattern comparator 18.

Other than the above, it is the same as in FIG. 2. However, although the image display device 13 is not shown in FIG. 3, it may be used in combination.

Under normal conditions, hoistway equipment (not shown), main ropes 6, and moving cables 9 are observed at multiple points over the entire height of the hoistway at a preset angle of the imaging device 12.
An image signal such as the following is acquired. That is, lighting lamp 1
1 is turned on, the pattern recognition device 16 extracts features from the image signal 12a of the imaging device 12, and the characteristic signal generated is stored in the storage device 17.

After an earthquake occurs and the elevator is rendered inoperable in step F of Figure 1, as explained in Figure 2,
The building manager operates the elevator control panel 14,
Run the car at low speed. Now, the image signal 12a of the imaging device 12 is obtained at the plurality of points,
The pattern recognition device 16 emits characteristic signals as described above. The pattern comparator 18 compares the current characteristic signal with the output of the storage device 17, that is, the characteristic signal during normal operation, and outputs an output corresponding to the difference, which is displayed on the display 19. If the above difference is large, it means that there has been a considerable change in the equipment and members in the hoistway 5 before and after the earthquake, so the manager should not allow the car to run to the next set point. If the above difference is small, it means that there are few changes before and after the earthquake.
4, the car is run to the next set point and the same inspection as described above is performed. Then, when the difference in pattern recognition before and after the earthquake is small at all set points, the elevator control panel 14 is configured to perform high-speed automatic operation.

Although FIGS. 2 and 3 show the imaging device 12 installed on the car frame 7, it is also possible to install it on a dedicated elevating body (not shown) that is raised and lowered separately from the elevator.

In this way, an abnormality can be detected by comparing the characteristic signals of the pattern recognition device 16, so that inspection means for specialized maintenance personnel can be set in advance, and safety can be further increased.

FIG. 4 also shows another embodiment of the invention.

In this embodiment, FIGS. 2 and 3 show the imaging device 1.
2 on the car frame 7 (or on a dedicated elevating body)
In contrast, it is installed on the wall of hoistway 5.

That is, the imaging device 12 is installed on the wall of the hoistway 5 via a drive device 12A that changes its direction and controls the zoom lens. The driving machine 12A is operated by a driving signal 14b from the elevator control panel 14 shown in FIG. 2 or 3. The image signal 12a is input to the display 13 in FIG. 2 or the pattern recognition device 16 in FIG. 3.

In this embodiment, the image signals 12a obtained from the preset position of the car, the direction of the imaging device 12, and the zoom magnification are compared before and after the earthquake.

〔Effect of the invention〕

As described above, in this invention, an imaging device is installed in the hoistway, and the image signals are compared before and after the earthquake and the difference is displayed, so the condition inside the hoistway is automatically monitored and managed. To quickly and safely restore an elevator to normal operation after an earthquake without relying on the help of specialized maintenance personnel.

[Brief explanation of the drawing]

FIG. 1 is an operation flowchart showing the conventional procedure for restoring elevator normal operation after an earthquake, FIG. 2 is a vertical cross-sectional view of a hoistway showing an embodiment of the elevator monitoring device after an earthquake according to the present invention, and FIG. A block circuit diagram showing another embodiment of the invention, and FIG. 4 is also a partial vertical sectional view of a hoistway showing another embodiment of the invention. In the diagram, 5 is the elevator hoistway, 7 is the car frame, and 1
2 is an imaging device, 16 is a pattern recognition device, 17 is a storage device, 18 is a pattern comparator, and 19 is a difference display device. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1. An imaging device that is installed on a hoistway that moves up and down in the hoistway and that photographs the inside of the hoistway and emits an image signal, a comparison device that compares the image signals before and after the earthquake and displays the difference, and A post-earthquake elevator monitoring device comprising a differential display located at a different location and displaying the output of the comparison device.