JPH07237839A - Alarming device during maintenance of elevator - Google Patents

Abstract

PURPOSE:To prevent a worker from colliding with the top of an elevator shaft or a balancing weight by informing the worker on a car of the possible danger based on the operation of an upper forced outage switch of the car or a switch to detect the approach of the balancing weight to the car during the maintenance and inspection of the elevator. CONSTITUTION:An elevator control panel 8 controls the operation of a car 4 based on the operation of a manual operation switch 8 arranged on the upper part of the car 4 by a worker 1 during the maintenance and inspection of an elevator. The elevator control panel 8 regulates the upper limit position of the car 4 based on the operation of an upper forced outage switch 2 arranged in an elevator shaft. The approach of a balancing weight to the car 4 is detected by upper and lower proximity detecting switches 11, 12 respectively. On the other hand, a device 13 to inform the worker 1 of the potential danger is arranged on the upper part of the car 4. The operation stopping control by the upper forced outage switch 2 is released during the maintenance and inspection, and the alarming device 13 is operated by the upper forced outage switch 2 or the respective switches 11, 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator maintenance notification device for preventing an accident of a worker during elevator maintenance inspection operation on a car.

[0002]

2. Description of the Related Art FIG. 4 shows the configuration of each device in a conventional elevator hoistway. In FIG. 4, reference numeral 2 denotes an upper forced stop switch attached to the upper part of the hoistway, which is connected to the elevator control panel 8 via the wiring cable 2a and contacts the switch operating cam 5 attached to the car 4. The operation signal is input to the elevator control panel 8 through the wiring cable 2a so that the elevator control panel 8 does not drive the car 4 in the ascending direction from the operating position of the upper forced stop switch 2. Controlled.

A counterweight 6 is connected to the car 4 by a main rope 8 via a hoist 7, and the counterweight 6 is moved up and down as the car 4 is moved up and down. , When the car 4 travels in the ascending direction, the counterweight 6 moves in the descending direction, and conversely, when the car 4 travels in the descending direction, the counterweight 6 moves in the ascending direction. Is configured to intersect at the midpoint of the hoistway.

Further, numeral 9 is a manual operation switch on a car, which is attached to the upper part of the car 4 for operating the elevator on the upper part of the car 4 during the maintenance operation work of the elevator,
The operation signal is input to the elevator control panel 8 via the connection cable 3. Also, 10a to 10c are caution labels for notifying the worker 1 of danger by being attached to the hoistway wall near the top of the hoistway and near the car 4 as the counterweight 6 approaches the car 4 as the car 4 moves up and down. Is.

Next, the operation of the above configuration will be described. During elevator maintenance and inspection work, a manual lifting operation is performed on the car based on the operation of the on-car manual operation switch 9. However, as the car 4 moves up and down, the car 4 moves near the top of the hoistway or the counterweight 6 When approaching the hoistway wall near the car 4, the operator 1 can recognize the danger by the caution labels 10a to 10c. When the car 4 is stopped at the top floor and the distance between the upper part of the car 4 and the top of the hoistway is extremely short, the upper part is forced to be forced during the manual operation based on the operator 1 operating the on-car manual operation switch 9. When the stop switch 2 is actuated, the elevator control panel 8 for inputting the actuation signal is operated by the upper forced stop switch 2 even if the on-car manual operation switch 9 is operated.
The operator 1 is controlled so as not to operate in the ascending direction to prevent the worker 1 from colliding with the top of the shaft.

[0006]

However, in the above-mentioned structure, the above-mentioned caution labels 10a, 10b, 10c may be overlooked during work during manual elevator operation on the car during elevator maintenance and inspection work on the car. When the worker 1 cannot recognize the danger due to the approach to the top of the hoistway or the counterweight 6, the worker 1
Would collide with the top of the hoistway or the counterweight 6, which could lead to an accident. Also, regarding the function of preventing the operator 1 from colliding with the top of the hoistway by controlling the car 4 not to operate in the ascending direction by the upper forced stop switch 2, the maintenance inspection of the equipment near the top of the hoistway is performed. Since work cannot be performed, the function of the upper forced stop switch 2 is equivalently removed by a short circuit or the like only when maintenance is performed near the top of the hoistway. in this case,
The only way to prevent a collision accident at the top of the hoistway is to call attention using the above caution label, and there is no protection measure against overlooking the caution label.

The present invention has been made in order to solve the above-mentioned problems associated with the conventional example, and in the elevator car maintenance / inspection work on the car, during the manual elevator operation on the car,
An object of the present invention is to obtain an elevator maintenance notification device that can prevent an operator from colliding with the top of a hoistway or a worker from colliding with a counterweight and can prevent an accident from occurring during work. .

[0008]

According to a first aspect of the present invention, there is provided an elevator maintenance time alarm device, which is provided on a car of an elevator and is provided with a manual operation switch for manually operating the car during a maintenance inspection operation. The upper forced stop switch provided in the hoistway of the car to prevent the car from operating in the ascending direction from the top floor, and the operation control of the car based on the input of the operation signal of the manual operation switch, and the upper compulsion of the car. In an elevator equipped with an elevator control panel that controls the car not to operate in the ascending direction from the operating position of the upper forced stop switch based on the input of the operation signal of the stop switch, during maintenance inspection operation based on the operation of the above manual operation switch. , Detecting means for detecting the approach of the car and the counterweight, and an operator on the car provided on the car of the elevator. The elevator control panel is provided with a notifying means for notifying the operator of the ascending direction based on the operation signal of the upper forced stop switch during maintenance and inspection operation based on the manual operation switch. The manual operation control based on the operation switch is enabled, and the notification means is notified based on the input of the operation signal of the upper forced stop switch or the detection signal of the detection means.

Further, in the elevator maintenance time notification device according to a second aspect of the present invention, the elevator control panel controls the stop of the elevator when the timer count is started and the specified time is reached after the notification control of the notification means. It is characterized by.

[0010]

In the elevator maintenance notification device according to the first aspect of the present invention, during the maintenance and inspection operation based on the operation of the manual operation switch, the elevator control panel causes the elevator to move in the upward direction based on the operation signal of the upper forced stop switch. The operation stop control is released to enable the manual operation control based on the manual operation switch, and the operation signal of the upper forced stop switch or the detection signal by the detection means for detecting the approach of the basket and the counterweight is input. By notifying the warning means when the warning is given, the danger can be notified to the operator on the car and the worker can be surely aware of the danger. During manual elevator operation, prevent workers from colliding with the top of the hoistway or the workers from colliding with the counterweight. To prevent the accident that in advance.

Further, in the elevator maintenance notification device according to a second aspect of the present invention, the elevator control panel causes the elevator control panel to stop the elevator when the timer count is started after the notification control of the notification means and the specified time is reached. By doing so, the elevator is forcibly stopped and controlled when the worker does not take measures to cope with the danger despite the notification control of the above-mentioned notification means, and the manual elevator operation on the car during the elevator maintenance inspection work on the car. At times, it is possible to prevent the operator from colliding with the top of the hoistway or the operator from colliding with the counterweight, and prevent an accident from occurring during the operation.

[0012]

【Example】

Example 1. Next, the present invention will be described based on illustrated embodiments. FIG. 1 is a configuration diagram illustrating an elevator maintenance notification device according to a first embodiment. In FIG. 1, the same reference numerals as those in the conventional example shown in FIG. 4 indicate the same parts, and the description thereof will be omitted.
As new symbols, 11 and 12 are attached to devices such as a main rail in a hoistway with a detachable structure, and are upper parts for detecting that a worker 1 and a counterweight (not shown) approach each other. With the counterweight approaching detection switch and the lower counterweight approaching detection switch, the upper counterweight approaching detection switch 11 is, for example, the car 4 and the counterweight 6 when the car 4 is traveling downward. About 200
The lower counterweight approaching detection switch 12 is attached at a position where it operates about 0 mm before, and when the car 4 is traveling in the ascending direction, the car 4 and the counterweight 6 intersect about 2000 mm, for example. It is installed at a position where it operates about a while ago, and when the car 4 approaches these switches, the switches are operated by the switch operating cam 5, and the operation signals are input to the elevator control panel 8 via the wiring cables 11a and 12a, respectively. To be done.

Reference numeral 13 denotes a danger alarm device 13 such as a buzzer or a lamp, which is attached to the upper portion of the car 4 so as to be detachable, and the danger alarm device 13 is connected to the elevator control unit 3 via the connection cable 3. When the upper balance weight approaching detection switch 11 or the lower balance weight approaching detection switch 12 detects the approaching of the counterweight when connected to the panel 8 and the elevator control panel 8 performs maintenance operation by manual operation, Alternatively, when the car 4 approaches the top of the hoistway and the upper forced stop switch 2 is actuated, the car 4 operates under the control of the elevator control panel 8 to make the operator aware of the danger.

It should be noted that the elevator control panel 8 has the above-mentioned upper counterweight approaching detection switch 11 or the lower counterweight approaching detection switch 12 in operation,
The on-car operator 1 continues to operate the on-car manual operation device 9 to operate the elevator only intermittently. Similarly, when the operation signal of the upper forced stop switch 2 is output, the operation stop control in the ascending direction based on the operation signal is released to enable the manual operation control based on the manual operation switch 9 to enable the elevator. Is operated only intermittently.

The internal structure of the elevator control panel 8 has the structure shown in FIG. That is, CP
Wiring cable 2 for U8a, upper forced stop switch 2, upper counterweight approach detection switch 11, lower counterweight approach detection switch 12, and on-car manual operation switch 9
The interface 8b is connected via a, 11a, 12a and the connection cable 3, and the interface 8c is connected to the hoisting machine 7 and the danger alarm device 13.

Next, the operation of the elevator maintenance notification device according to the first embodiment having the above configuration will be described with reference to the flowchart of the control operation of the CPU 8a shown in FIG. Now, referring to FIG. 1, while the car 4 is traveling in the ascending direction based on the operation of the on-car manual operation device 9 by the worker 1, the car 4 approaches the top of the hoistway and operates the switch attached to the car 4. When the upper forced stop switch 2 is operated by the cam 5 or the lower counterweight approach detection switch 12 is operated by the switch operating cam 5, the upper forced stop switch 2 or the lower counterweight approach detection switch 12 is operated. The CPU 8a recognizes that this has been done (steps S30, S31, S32, S33). At this time, the CPU 8a outputs a command to ring the buzzer or the like to the danger notification device 13 (step S34).

After the ringing process of the danger alarm device 13, if the operation in the ascending direction is further continued, the CPU 8a starts the timer count of the ascending direction operation time, and when the timer reaches the specified value, the danger alarm is issued. The ringing stop procedure of the device 13 is performed and the elevator stop procedure is performed (step S3).
5, S36, S37, S38, S39). In FIG. 3, the specified time of step S37 is
Set the car 4 so that it can travel about 300 mm. Further, in FIG. 3, when the operation of the on-car manual operation switch 9 is stopped before the specified time is reached in step S45, the ringing stop treatment of the danger alarm device 13 and the elevator stop treatment are immediately executed based on steps S38 and 39. Is performed (step S45).

In FIG. 1, the upper balance weight approach detection switch 11 is operated by the switch operating cam 5 while the car 4 is traveling in the descending direction based on the operation of the on-car manual operation device 9 by the worker 1. In this case, in FIG. 3, steps S30, S31, S32, S40, S43 and S4 are performed.
4, S36, S37, S38, S39, the lower counterweight approach detection switch 12 during traveling in the ascending direction described above.
Performs the same processing as when is activated.

It should be noted that these operations are effective only in the manual operation in step S30 in FIG.
In the ascending direction, the upper forced stop switch 2,
If the upper counterweight detection switch 11 and the lower counterweight detection switch 12 are not operating during downward operation,
In FIG. 3, steps S43, S44, S34, S3
The treatments of 5, S36, S37, S38 and S45 are not performed.

Therefore, according to the first embodiment, the worker 1
When the vehicle approaches the top of the hoistway or the counterweight, a buzzer or the like sounds from the danger notification device 13 every time the elevator is operated near the worker 1, and continuous operation is suppressed.
Higher risk perception is possible. Thereby, the worker 1
It is possible to prevent an accident in which the vehicle collides with the top of the hoistway or the counterweight. Also, by the elevator control panel 8,
After the notification control of the danger notification device 13, by starting the timer count and stopping the elevator when the specified time is reached, the operator can take measures against the danger despite the notification control. , The elevator is forcibly stopped and controlled, and it is possible to reliably prevent the worker from colliding with the top of the hoistway or the worker from colliding with the counterweight, and prevent the occurrence of accidents during work. .

Example 2. Note that, in place of the upper counterweight approaching detection switch 11 and the lower counterweight approaching detection switch 12 in the first embodiment shown in FIG. 1, a car using a rotation detector of the hoist mounted on the hoist 7. By detecting the car position with the position detector, it is possible to prevent the operator from colliding with the top of the hoistway or the operator from colliding with the counterweight, and the same effect as in the first embodiment can be obtained. You can

[0022]

As described above, according to the first aspect of the present invention, during the maintenance / inspection operation based on the operation of the manual operation switch, the elevator control panel moves the vehicle in the ascending direction based on the operation signal of the upper forced stop switch. The operation stop control is released to enable the manual operation control based on the manual operation switch, and the operation signal of the upper forced stop switch or the detection signal by the detection means for detecting the approach of the basket and the counterweight is input. By notifying the warning means when the warning is given, the danger can be notified to the operator on the car and the worker can be surely aware of the danger. Prevents an operator from colliding with the top of the hoistway or the operator from colliding with the counterweight during manual elevator operation to prevent accidents during work. An effect that it is possible to prevent the natural.

Further, in the elevator maintenance notification device according to a second aspect of the present invention, the elevator control panel controls the stop of the elevator when the timer count is started and the specified time is reached after the notification control of the notification means. By doing so, the elevator is forcibly stopped and controlled when the worker does not take measures to cope with the danger despite the notification control of the above-mentioned notification means, and the manual elevator operation on the car during the elevator maintenance inspection work on the car. In this case, it is possible to reliably prevent the operator from colliding with the top of the hoistway or the operator from colliding with the counterweight, and it is possible to prevent an accident from occurring during the operation.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an elevator maintenance time notification device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of an elevator control panel according to the first embodiment of the present invention.

FIG. 3 is a control flow chart for maintenance hazard notification of the elevator control panel according to the first embodiment of the present invention.

FIG. 4 is an overall configuration diagram showing a conventional danger warning means for maintenance of an elevator.

[Explanation of symbols]

 2 Upper forced stop switch 4 Car 9 Manual operation switch on car 11 Upper counterweight approach detection switch 12 Lower counterweight approach detection switch 13 Danger warning device

Claims (2)

[Claims] 1. A manual operation switch provided on an elevator car for manually operating the car during maintenance and inspection operation, and an elevator hoistway provided to prevent the car from operating in the ascending direction from the top floor. To control the operation of the car based on the input of the operation signal of the upper manual stop switch and the operation signal of the upper manual stop switch. In an elevator equipped with an elevator control panel for controlling not to operate in the ascending direction, at the time of maintenance and inspection operation based on the operation of the manual operation switch, detection means for detecting that the car and the counterweight approach each other, and the elevator The elevator control panel is provided with a notifying means provided on the car to notify a worker on the car of danger. During maintenance inspection operation based on the switch, the operation stop control in the ascending direction based on the operation signal of the upper forced stop switch is released to enable the manual operation control based on the manual operation switch, and the upper forced stop switch An elevator maintenance notification device, which notifies the notification means based on an input of an operation signal or a detection signal from the detection means. 2. The maintenance of the elevator according to claim 1, wherein the elevator control panel starts timer counting after the notification control of the notification means and stops the elevator when a specified time is reached. Notification device.