JPH09249360A - Limit switch operation inspection device of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a limit switch operation inspection device of an elevator which can check the operation condition of a limit switch on a controller side easily. SOLUTION: Controllers 19, 20, 22 are controlled in such a manner that ordinary operation mode is released and an elevator is operated by exceeding a terminal story on one side, and limit switches 11, 13 detect that the elevator is operated by exceeding a floor landing position at the terminal story to stop the elevator. The position where the elevator stops is detected by a signal from a pulse generator 6, and a personal computer control part 5a judges whether the stop position is within normal scope or not. In this way, since whether functions of the limit switches 11, 13 are normal or not can be judged by the operation of a controller 5 side, it is unnecessary for inspection worker to ride in a car to perform the inspection and the maintenance, and inspection works can be done safely and speedily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator limit switch operation inspection device.

[0002]

2. Description of the Related Art Conventionally, in a so-called rope-type elevator having a wire rope as a main rope, due to some trouble such as a failure of a control system, the car further travels past each final stop position on the top floor or the bottom floor. If an attempt is made, a limit switch such as an overwinding prevention switch is detected for safety, and the elevator is configured to make an emergency stop.

Since the limit switch is a safety device provided in an emergency, it requires at least regular maintenance work. The inspection work of the limit switch requires an operation check for confirming whether or not the limit switch itself is in a normal mounting state and a normal switching operation is performed.

Therefore, at the time of inspection work, usually two specialized engineers act as inspection workers to get into the elevator and drive it. In the pit at the bottom of the hoistway on the descending side, and on the ascending side, the car. The maintenance and inspection work of the limit switch was performed.

[0005]

As described above, the operation inspection of the limit switch of the conventional elevator is performed in a narrow hoistway, in a pit, or on a car.
Moreover, it requires a lot of labor and a lot of time because it requires a lot of manual work such as confirmation of the mounting state and switching operation.

Further, since the inspection work is performed while the elevator is actually operating in a narrow space inside the hoistway or inside and outside the car, some kind of improvement has been demanded from the safety of the inspection worker himself.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above conventional problems, and a controller for canceling a normal operation mode of an elevator and controlling the elevator so that the elevator is operated beyond one terminal floor. The limit switch that operates to stop the elevator by detecting that the elevator car has been operated beyond the landing position on the one end floor by the control of the controller, and stopped by the operation of this limit switch. It is characterized by comprising a start switch for operating the elevator toward the other terminal floor, and a position detecting means for detecting the stop position of the elevator stopped by the operation of the limit switch.

According to the present invention, as described above, the normal operation mode of the elevator is released by the controller, the elevator is operated toward at least one of the terminal floors, and the stop position of the elevator stopped by the limit switch operation is detected. It is composed.

Therefore, since the inspector can obtain the stop position information due to the operation of the limit switch just by operating the controller, the inspector directly gets into the car and narrows the hoistway as in the conventional case. Without working inside
The function of the limit switch can be checked.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an elevator limit switch operation inspection device according to the present invention will be described below with reference to FIG.
Also, a detailed description will be given with reference to FIG.

FIG. 1 shows the construction of an elevator apparatus to which an embodiment of a limit switch operation inspection apparatus according to the present invention is applied. An elevator car 1 is a main rope (rope) 2 through a hoist 3. It is connected to the counterweight 4 and moves up and down under the control of the hoisting machine 3 by the control device 5.

A pulse generator 6 is connected to the hoisting machine 3, converts the number of revolutions of the hoisting machine 3 into an electric pulse signal, and the converted pulse signal is supplied to a control device 5, whereby an elevator, That is, the position of the car 1 in the hoistway is detected.

Further, the control device 5 is connected to the monitoring device 8 in the remote monitoring center via the communication terminal device 7, and the remote operation control of the elevator is possible by the signal transmission from the monitoring device 8 side. Is configured.

Therefore, an elevator pit 9 is provided at the final end of the lower part of the hoistway, and when the elevator is operated below the stop floor 10 below the stop floor 10 at the bottom floor, The lower limit switch 11 for detecting this and stopping the elevator in an emergency
Is provided. In addition, a shock absorber 12 is provided in the pit 9 as a protective safety device in the case where the car 1 accidentally descends beyond the lowest floor stop floor 10.

Similarly, above the hoistway, a limit switch 13 on the ascending side is provided in case of ascending above the stop floor of the uppermost floor. The operation signals of the limit switches 11 and 13 are transmitted to the control device 5 by the signal transmission cable 14 so that the elevator is brought to an emergency stop and passenger safety is ensured.

Such limit switches 11, 13
When the elevator moves up and down beyond the normal operating area of the elevator as described above, it detects that the elevator has reached a preset position, and operates by raising or lowering the rope to raise or lower the car. An overwinding prevention switch used for a winding cylinder type elevator is also included here.

Therefore, in the elevator apparatus having the above-described structure, an embodiment of the elevator limit switch operation inspection apparatus of the present invention is configured as shown in FIG.

That is, the descending side operation limiting relay 1 connected to the limit switches 11 and 13 respectively.
5. A rising side operation limiting relay 16 is connected between the power supply lines A and B.

In the normal operation mode, the ascending operation relay 17 and the descending operation relay 18 are controlled by the microcomputer control section 5a in the control device 5, but the microcomputer control section 5a itself is different from the power supply lines A and B. It is driven by power supply from a power source (not shown).

Therefore, in the normal operation mode, the operation relays 17 and 18 are the same as the operation restriction relays 15 and 16 respectively.
Since the power is supplied through the contacts 15a and 16a, the operation relays 17 and 18 are controlled by the microcomputer controller 5a, and the descending operation relay 18 is moved up again when the elevator is descending in the normal operation. At this time, the ascending operation relays 17 are each turned on, and are controlled to be turned off when landing on each floor of the elevator.

As described above, the elevator is in the state in which either the descending operation relay 18 or the ascending operation relay 17 is controlled by the control of the microcomputer controller 5a,
The control device 5 controls the hoisting machine 3 by the operation signals of the respective operation relays 17 and 18, and the car descends or ascends accordingly. Therefore, during normal operation, the bottom floor and the top floor are operated. It is not possible to drive the elevator beyond the floor stop positions of.

Therefore, in this embodiment, the controller is configured so that the operation inspection work of the limit switches 11 and 13 can be carried out by the operation of the control device 5, and each limit switch 11 and 13 is associated with the controller. As described above, the lowering operation switch 20 and the inspection lowering operation relay 2 are connected through the pair of inspection operation switches 19 (191, 192).
The series circuit of No. 1 and the ascending operation switch 22 and the ascending operation relay 23 are connected in parallel to the descending side operation limiting relay 15 and the ascending side operating limiting relay 16, respectively. The b contacts 21b and 23b of the inspection descending operation relay 21 and the inspection ascending operation relay 23 are connected to the power supply line A in series with the a contacts 15a and 16a, and the contacts are closed. Further, the inspection operation switch 19 and the respective operation switches 20 and 22 are provided in the control device 5 similarly to the microcomputer control section 5a.

Therefore, in the circuit configuration shown in FIG.
First, when the operation inspection work of one limit switch 11 is performed, first the inspection operation switch 19 (191, 192) is turned on.
By performing N operation and then turning on the lowering operation switch 20 which is one of the starting switches, the inspection lowering operation relay 21 is turned on and its b contact 21b is opened. Is cut off, the elevator is released from the normal operation mode, and the ON signal of the inspection lowering operation relay 21 causes the control device 5 (not shown) to pass the lowest floor 10 on the lowest floor at a low inspection speed. Control to perform descent operation.

In this way, the elevator car continues to descend, and when it reaches the position at which the limit switch 11 is operated beyond the landing position on one of the terminal floors, the limit switch 11 is turned off, whereby When the descending side operation restriction relay 15 is turned off, the elevator is brought to an emergency stop. Also, the limit switch 11 is turned off.
Due to the operation, the inspection lowering operation relay 21 becomes 0FF, and the b contact 21b is closed, but the lowering side operation restriction relay 1
Since the a-contact 15a is opened by turning OFF the switch 5, the normal operation mode is still released.

When the elevator car is in a stopped state, the position detecting section 5a1 of the microcomputer control section 5a causes the pulse generator 6 to operate.
In response to the signal from, the current stop position of the elevator is calculated and supplied to the comparison operation circuit 5a2. In the comparison calculation circuit 5a2, the data of the position detection unit 5a1 and the stop position setting circuit 5a3 are compared with preset limit switch operating position data from the stop floor of the lowest floor, that is, stop position data. However, if the difference exceeds the range of a predetermined allowable value, it is determined that the operation of the lower limit switch 11 is abnormal, and the alarm output signal C is derived. Of course, by comparing the data of the position detector 5a1 with the stop position data of the stop position setting circuit 5a3, if the difference is within a predetermined allowable range, the operation of the lower limit switch 11 is not normal. By determining that there is, the presence or absence of abnormality in the operating state of the limit switch 11 is detected.

Next, the descending operation switch 20 which is one of the starting switches is turned off and the ascending operation switch 22 which is the other starting switch is turned on.
When the ascending operation switch 22 is turned on, the inspection ascending operation relay 23 operates, and the elevator shifts from the stopped state to the ascending operation.

When turning to ascending operation, first, the limit switch 11 on the descending side is restored to the original state, so the descending side operation limiting relay 15 is turned on, and the elevator continues to operate at a low inspection speed by the control of the control device 5 not shown. Continue climbing operation.

In this way, the operation of the lower limit switch 11 can be inspected under the control of the controller.

The above description is for the lower limit switch 11
Although the process from the start to the end of the work for checking the operation of (1) to the reversing and ascending has been described, the operation check of the ascending side limit switch 13 can be similarly performed.

That is, as described above, when the ascending operation switch 22 which is the other start switch is turned on, the inspection ascending operation relay 23 is turned on and its b contact 23b is opened, so that the elevator is continuously released from the normal operation mode. The controlled state is maintained, and the control device 5 (not shown) controls to perform an ascending operation beyond the uppermost stop floor at a low inspection speed.

When the elevator car is operated beyond the landing position on the other end floor, the limit switch 13
Turns off, and the upper / lower side operation limit relay 16 turns off.
By doing so, the elevator will stop in an emergency. Also,
When the limit switch 13 is turned off, the inspection rising operation relay 23 is turned off and the b contact 23b is closed.
Since the contact 16a is open, the normal operation mode continues to be in the released state.

Therefore, when the elevator car is in a stopped state, similarly, the position detection unit 5a1 of the microcomputer control unit 5a receives a signal from the pulse generator 6, calculates the current stop position of the elevator, and supplies it to the comparison calculation circuit 5a2. Then, the data of the position detector 5a1 and the stop position setting circuit 5a3
The appropriate limit switch operating position data from the stop floor of the uppermost floor set in advance, that is, the stop position data, is compared, and if the difference exceeds a predetermined allowable range, the rising limit It is determined that the switch 13 is abnormal, and the alarm output signal C is derived, and the operation of the limit switch 13 is inspected. If the comparison difference between the data of the position detector 5a1 and the stop position data is within a predetermined allowable range, the rising side limit switch 13 is determined to be normal.

Then, the OF of the ascending operation switch 22 is next.
When the descending operation switch 20 is turned ON together with the F operation, the inspection descending operation relay 21 is operated and the elevator is changed from the stopped state to the descending operation. When the descent operation is started, the ascending side limit switch 13 is restored to the original state,
The ascending side operation restriction relay 16 is turned on, and the elevator is descended at a low inspection speed by the control of the control device 5 (not shown).

The alarm output signal C can be configured so that it can be easily visually confirmed by the inspection operator by being supplied and displayed on a display device or a display lamp with a sound such as a buzzer not shown.

As described above, in this embodiment, the stop position of the elevator detected by the position detecting means,
And a comparator for deriving a value of the difference by comparing with a preset stop position, and by a judging means for deriving an alarm signal when the value of the difference derived from the comparator exceeds a predetermined value. A simple and reliable inspection is possible.

When returning to the normal operation mode after the operation inspection work of the limit switch is completed as described above, it goes without saying that the limit switches 11 and 13 on the descending side and the ascending side are in a closed state. Since the operation limiting relays 15 and 16 are turned on, when the inspection operation switch 19 (191, 192) is turned off, the inspection operation relays 21 and 23 are turned off.
Power is supplied to the circuits of the operation relays 17 and 18 by the a-contacts 15a and 16a and the b-contacts 21b and 23b, and the normal operation mode is set.

In addition, it is desirable for safety that there are no passengers in the car when checking the operation of the limit switch of the elevator.

Therefore, the inspection operation switch 19 shown in FIG.
A check operation prohibition switch is separately connected in series to, and it is possible to check whether or not there is a signal from the car load detector (not shown).
The connection is configured to operate F and ON, and the signal from the car load detector turns on the switch only when there is no passenger in the car, and at that time, the inspection work by operating the inspection operation switch 19 becomes possible. Can be configured. By checking the presence or absence of passengers in this way, it is possible to carry out an efficient limit switch operation inspection work without lowering the driving service.

Since the inspection operation switch 19 and the respective ascending / descending operation switches 22 and 20 are provided in the control device 5, they can be remotely controlled from the remote monitoring center device 8 side via the communication terminal device 7 of FIG. It is also possible to perform work by turning on and off, and in the same way as before, an inspector can directly enter the elevator car and use the limit switches 11, 1
There is no need to carry out the inspection of 3.

As described above, according to the present invention, the operating condition of the limit switch can be notified not only to the control device but also to the monitoring device which is remotely operated by a simple switching operation by the controller. The limit switch inspection work, which was performed manually by a specialist engineer, does not require any high level of specialized technology and can now be performed reliably and safely.

[0041]

As described above, according to the present invention, the operation of each upper and lower limit switch in the elevator hoistway can be confirmed by remote control or the like only by adding a control circuit for inspecting the operation of the limit switch. Therefore, it is possible to reduce the load on the worker and ensure the safety, which is a great effect in practical use.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an elevator to which an embodiment of an elevator limit switch operation inspection device according to the present invention is applied.

FIG. 2 is a detailed circuit diagram of the device shown in FIG.

[Explanation of reference symbols] 1 car 3 hoist 5 control device 5a microcomputer control unit 5a1 position detection unit 5a2 comparison calculation circuit 5a3 stop position setting circuit 6 pulse generator 7 communication terminal device 8 monitoring device 11, 13 limit switch 14 signal transmission cable 15, 16 Operation limit relay 17, 18 Operation relay 19 Inspection operation switch 20, 22 Operation switch 21, 23 Inspection operation relay

Claims (3)

[Claims] 1. A controller for canceling a normal operation mode of an elevator and controlling the elevator to operate beyond one terminal floor,
The limit switch that operates to stop the elevator by detecting that the elevator car has been operated beyond the landing position on the one end floor by the control of this controller, and the limit switch that operates to stop. A limit switch operation inspection device for an elevator, comprising: a start switch for operating the elevator toward the other terminal floor; and position detection means for detecting a stop position of the elevator stopped by the operation of the limit switch. 2. A comparator for comparing the stop position of the elevator detected by the position detecting means with a preset stop position and deriving a value of the difference, and a difference of the difference derived from the comparator. The limit switch operation inspection device for an elevator according to claim 1, further comprising a determination unit that derives an alarm signal when the value exceeds a predetermined value. 3. The elevator limit switch operation inspection device according to claim 1, wherein the controller operates when there is no passenger in the car.