JPH02169482A - Controller for elevator - Google Patents

Abstract

PURPOSE:To carry out the maintenance inspection for an elevator safely and efficiently by installing a control means for compulsorily suspending the operation of an elevator cage at a prescribed position by the output of a receiving means. CONSTITUTION:When the output having a prescribed cycle which is supplied from a transmitter which an elevator maintenance inspector on an elevator cage 2 takes is received by a receiving means thought an antenna 8 installed on the ceiling part of an elevator passage 1, A receiving confirmation relay 11 of a control means is excited on the basis of the received output of the receiving means. Therefore, an all-time opened contact point 11 is closed, and a compulsory stop instruction relay 3 is excited. Therefore, if an elevator cage 2 reaches a prescribed position in the elevator passage 1 during the maintenance inspection work, i.e., the position where the head and body of the maintenance inspector do not contact the coiling of the elevator passage 1, the operation of the elevator cage 2 by a hydraulic jack 7 is compulsorily suspended. Therefore, the maintenance inspection for the elevator can be carried out safely and efficiently by permitting the automatic stop of the cage 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an elevator control device having a forced elevator stop function.

(Conventional technology) Recently, in order to make effective use of land, many low-rise houses of about three stories and houses for the physically disabled are being built using hydraulic power, which is relatively inexpensive. There is a tendency for elevators to be installed.

By the way, such residential elevators are required to be regularly maintained and inspected several times a month to ensure that they always operate safely and without failure. In this case, maintenance and inspection work is carried out in detail, and may be performed while the worker remains on the elevator car while raising and lowering the elevator car.

(Problem to be solved by the invention) However, according to laws and regulations, the minimum distance between the elevator car and the ceiling of the hoistway when the elevator car is raised to its maximum is smaller than that of a general lobe type elevator. As a result, if a worker was riding on the elevator car, when the elevator car moved to the top floor, unless the worker bent his body, he would hit the ceiling of the hoistway. For this reason, if a worker is so absorbed in his work that he does not notice the shaft ceiling, he may hit his head or body against the shaft ceiling, which could lead to an extremely serious accident.

For this reason, workers have to proceed with maintenance and inspection work while always paying attention to the elevator's ascending and descending status, which also causes a decrease in work efficiency.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an elevator control device that can improve the safety and work efficiency of maintenance and inspection work.

[Configuration of the Invention (Means for Solving the Problems) The present invention is configured such that when the receiving means receives an output of a predetermined frequency from the transmitting means, the elevator car is forcibly stopped at a predetermined position in the hoistway. ing.

(Function) As a result, by having those engaged in elevator maintenance and inspection carry such a transmitting means, they can safely and efficiently proceed with their work without having to worry about raising and lowering the elevator car 9. become.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic diagram of a hydraulic elevator to which this embodiment is applied. In the figure, 1 is the hoistway,
An elevator car 2 is moved up and down along this hoistway 1. In this case, the elevator shaft 1 has two floors, and each opening has an elevator door 3.
It has 3.

The elevator car 2 is provided with a hydraulic jack 4.

The hydraulic jack 4 is connected to a hydraulic unit 6 via a hydraulic pipe 5 to obtain a drive source for controlling the elevator car 2 to move up and down.

Reference numeral 7 denotes a transmitter that generates an output of a predetermined frequency, and this transmitter 7 is carried by a person engaged in maintenance and inspection of the elevator. The output from the transmitter 7 is received by a receiver 9 via an antenna 8 provided on the ceiling of the hoistway 1, and the received output is sent to a control panel 10.

The control panel 10 has a control circuit shown in FIGS. 2(a) and 2(b). In this case, a series circuit of a reception confirmation relay 11 and a reset switch 12 is connected to the output terminal of the receiver 9, so that when the receiver 9 receives the output from the transmitter 7, the reception confirmation relay 11 is energized. There is. in this case,
When a reset switch (not shown) is operated on the transmitter 7 side, during this time the reset switch 12 on the receiver 9 side is opened and the reception confirmation relay 11 is de-energized.

The normally open contact 111 of this reception confirmation relay 11 is connected in series to the forced stop command relay 13, and this series circuit is connected between the bus lines PC and NC.

This forced stop command relay 13 is activated when the elevator car 2 reaches a predetermined position on the hoistway 1, that is, a position where the head or body of a worker riding on the elevator car 2 does not hit the ceiling of the hoistway 1. When this occurs, the elevator car 2 is forcibly stopped.

In addition, the series circuit of the normally closed contact 131 of the forced stop command relay 13 and the elevator operation safety circuit relay 14 is connected to the bus line PC,
It is connected between NC and prevents the operation of the elevator operation safety circuit relay 14 during a forced stop of the elevator to prohibit elevator operation, and also connects the normally closed contact 132 of the forced stop command relay 13 and the elevator lowering relay 15. The series circuit is the bus PC.

It is connected between the NC and allows the descending operation of the double-sided car from the moment the forced stop of the elevator is released.

Next, the operation of the embodiment configured as described above will be explained.

In such a hydraulic elevator, for example, in order to maintain and inspect the opening/closing mechanism of the six-opening door 3 of the hoistway 1, a worker may ride on the elevator car 2 to carry out the work. In such a case, if the worker carries the transmitter 7 in advance and turns on the power of the transmitter 7 before starting the work, the transmitter 7 will generate an output of a predetermined frequency, and this output will be transmitted to the antenna. 8 and the receiver receives the signal. Then, the reception confirmation relay 11 is energized by the output of the receiver 9, and the forced stop command relay 13 is energized by the closing operation of the normally open contact 111. As a result, when the elevator car 2 reaches a predetermined position in the hoistway 1 during maintenance and inspection work, the operation of the elevator car 2 by the hydraulic jack 7 is forcibly stopped.

In this case, the opening operation of the normally closed contact 131 of the forced stop command relay 13 prevents the elevator operation safety circuit relay 14 from operating during the forced stop of the elevator, thereby prohibiting elevator operation, and furthermore, the forced stop command relay 13 The opening operation of the normally closed contact 132 prevents the elevator lowering relay 15 from lowering the double-sided car 2.

Then, from this state, when the worker operates the reset switch of the transmitter 7 carried by the worker, the reset switch 12 on the receiver 9 side opens and the reception confirmation relay 11 is de-energized, so the forced stop command relay 13 The excitation of is also released, and the forced stop state of the elevator is released. In this case, the closing operation of the normally closed contact 131 of the forced stop command relay 13 enables the operation of the elevator operation safety circuit relay 14, preparing for elevator operation, and the closing operation of the normally closed contact 132 of the forced stop command relay 13. This allows the elevator lowering relay 15 to operate the double-sided car 2 in the direction away from the uppermost position.

Therefore, in this way, by receiving the output of a predetermined frequency from the transmitter 7 carried by the person working on the elevator car 2, by using the receiver 9,
Since the elevator car 2 can be forcibly stopped at a predetermined position in the hoistway 1, conventionally, if those engaged in maintenance and inspection work were too absorbed in their work to notice the hoistway ceiling, they would have to move their heads and bodies up and down the hoistway. Although there was a risk of the elevator colliding strongly with the road ceiling, this type of accident could be prevented, work safety could be ensured, and workers could proceed with maintenance and inspection work without having to worry about the elevator's elevation status. Because it is possible to
It is also possible to improve work efficiency.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented with appropriate modifications without changing the gist.

For example, in the above embodiment, the transmitter 7 is carried by a person engaged in maintenance and inspection, and the receiver 9 is installed on the ceiling of the hoistway 1, but the transmitter 7 may also be installed on the elevator car 2. However, the receiver 9 may be provided at any location other than the ceiling of the hoistway 1.

[Effects of the Invention] The present invention is configured such that when the receiving means receives an output of a predetermined frequency from the transmitting means, the elevator car is forcibly stopped at a predetermined position in the hoistway. By having those engaged in maintenance and inspection of elevators carry it, maintenance and inspection of such elevators can be carried out safely and efficiently.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a hydraulic elevator to which an embodiment of the present invention is applied, and FIG. 2 is a circuit diagram showing a control circuit of the embodiment. DESCRIPTION OF SYMBOLS 1... Hoistway, 2... Elevator car, 4... Hydraulic jack, 7... Transmitter, 9... Receiver, 11
... Reception confirmation relay 12 ... Reset switch Sochi, 13 ... Forced stop command relay Applicant's agent Patent attorney Takehiko Suzue Figure 1 c (a) (b) Figure 2

Claims (1)

[Claims] It is characterized by comprising a transmitting means for generating an output of a predetermined frequency, a receiving means for receiving the output of the transmitting means, and a control means for forcibly stopping the operation of the elevator car at a predetermined position based on the received output of the receiving means. Elevator control device.