JPH09278328A - Elevator door monitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator door monitor that can easily investigate the cause of a failure in case of the generation of a reversing failure of an elevator door. SOLUTION: A vedio camera 11 movable onto an elevator car upon the generation of a reversing failure of an elevator door is installed to photograph the opening/closing state of a car door 4 and a landing door 6 until the specified time limit from the action of an opening end detecting switch 9 of the car door 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator door monitoring apparatus for photographing an opening / closing operation of an elevator door using a video camera.

[0002]

2. Description of the Related Art Elevator doors are designed to open automatically when a car lands on a floor level and automatically close after a certain period of time. Therefore, when the door is blocked by hand when the door is opened or closed, or if a pebbles or the like is caught in the sill groove, the door is automatically turned over to prevent a personal injury or a door failure. When such abnormal operation is repeated a plurality of times, the door is stopped and the abnormal operation signal is issued to the monitoring center. At the monitoring center, maintenance engineers are immediately rushed to the site to investigate the cause of the failure and restore the door.

Regarding the above technique, there are, for example, JP-A-55-26329 and JP-A-5-97337.

[0004]

By the way, in an elevator delivered to a multi-tenant building or the like, a door reversal failure is often reported due to a mischief of a passenger. For this reason, when the maintenance engineer restores the door at the site, it often operates normally, and when the maintenance engineer arrives, there are no passengers, so it was difficult to investigate the cause.

Moreover, such a failure often occurs again, and there is a problem that it causes a great deal of trouble to the user.

In view of the above-mentioned drawbacks, an object of the present invention is to provide an elevator door monitoring apparatus capable of easily and promptly determining the cause of a failure of a door reversal failure. .

[0007]

The object of the present invention is to monitor a door of an elevator, which is opened by a door open command signal and closed by a door close command signal after a predetermined time period, by installing a video camera movable on a car. This is achieved by providing a means for photographing the open / closed state of the door from a time when the open end detection switch is operated to a predetermined time.

According to the present invention, when a reverse failure occurs in the door and the cause of the failure is unknown, the video camera is installed on the car and the opened / closed state of the door is photographed only for a predetermined time after the door is opened. Therefore, when a door reversal failure occurs, it is possible to know at what position and under what condition the reversing operation was performed by looking at this photographing record, and the cause of the door reversal can be easily determined.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG.

FIG. 1 is a side view of a car and a landing door on which a video camera according to the present invention is installed. In the figure, 1 is a hoistway, 2 is a hall, 3 is a car, and 4 is a car door of the car 3, which is opened and closed by a drive device 5. 6 is a hall door provided in the hall 2, and the cage door 7 provided in the car door 4 and the hall connector 8 provided in the hall door 6 are engaged with each other, so that the car door 4 and the hall door 6 are separated from each other. It opens and closes in synchronization. Reference numeral 9 denotes a door open end detection switch for detecting that the car door 4 has reached the open end. 11
Is a video camera, which is attached to the frame body 13 via the attachment base 12.

FIG. 2 is a front view seen from the car side of the hall door. In the figure, the landing door 6 is suspended by a door rail 16 via a door hanger 15 and is opened and closed left and right along a sill 18 via a door shoe 17. The car door 4 has the same structure, but the description thereof is omitted.

FIG. 3 is an electric circuit diagram of the door monitoring apparatus according to the present invention. In the figure, P and N are DC power supply terminals, 20
a is a switch, 19a is an a contact of a detection switch, 21 is a relay, 21a is its a contact, and 22T is a timer.
2Ta is its a contact, the relay 21 and the timer 22T are connected in parallel, and the contact 21a and the contact 22Ta are the camera 11
It is connected in series with the photographing circuit 23. 25, when the car door 4 and the landing door 6 are opened and closed, it is detected that the user manually locks the car door 4 or the landing door 6 or the sill 18 is caught by pebbles or the like, and the landing door 6 is locked. Is a door reversing device for automatically reversing, and 25a is an a contact of a relay which is closed when the door reversing device 25 operates.
Reference numeral 26 is a door abnormality detecting device for judging an abnormality when the door inversion operation is repeated several times in succession.

Next, the operation of this embodiment will be described.

Now, when the door abnormality detection device 26 is activated for some reason and this abnormality signal is issued to the monitoring center, a maintenance engineer rushes to the site to investigate the cause of the operation of the door abnormality detection device 26. However, it is assumed that the cause was unknown.

Therefore, the maintenance engineer attaches the video camera 11 to the frame 13 on the car, and the hall door 6 and the car door 4
Switch 20 in the direction of. By doing so, when the car door 4 is fully opened, the contact 9a of the door open end detection switch 9 is closed, so that the relay 21 is energized, the contact 21a is closed, and the video camera 11 starts photographing, and after a predetermined time limit. For example, after 3 minutes, the timer 22T counts up, the contact 22Tb opens, and photographing is stopped.
Therefore, if the user mischievously locks the car door 4 by hand during this time, the car door 4 performs a reversing operation. In this state, the reversing time, the door closed position, the number of reversing times, etc. are recorded in the video camera 11. Since the data is recorded, the maintenance engineer can easily find out the cause of the flipping of the door and deal with it by decoding the recorded tape at a later date.

The video camera may be a video camera for taking a frame when shooting for a long time.

[0017]

As described above, according to the present invention, when an abnormal failure occurs at the time of opening and closing a door, and the cause is unknown, a video camera is installed on the car to photograph the door open / closed state. With this configuration, it is possible to know when, at what position of the door, and in what state the door was turned over by looking at this shooting record, and it is possible to easily determine the cause of the door failure.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of an elevator door monitoring device of the present invention.

FIG. 2 is a front view of the landing door imaged by the elevator door monitoring device of the present invention as viewed from the car side.

FIG. 3 is an electric circuit diagram of the elevator door monitoring apparatus of the present invention.

[Explanation of symbols]

 3 car 4 car door 5 door drive device 6 landing door 9 door open end detection switch 11 video camera 12 mounting base 22 timer 23 camera drive device

Claims (1)

[Claims] 1. An elevator door monitoring device that opens with a door open command signal and closes with a door close command signal after a predetermined time period, after installing a video camera movable on a car and operating an open end detection switch of the door. An elevator door monitoring apparatus comprising means for photographing the opened / closed state of the door until a predetermined time period.