JPH09278304A - Control device of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate an unnecessary sudden stop by controlling an elevator according to a condition without suddenly stopping it when a vertical movement of a wheel tensioner is mainly caused by the extension contraction of a wire rope for an elevator. SOLUTION: When a wheel tensioner 7 falls on a pit floor surface in a hoistway since a compensating rope 6 is cut, or when the wheel tensioner 7 jupms up and down by impact since a car 5 suddenly stops 6, an absolute value of an output value of a speed detecting device 8a arranged in a central part of the wheel tensioner 7 becomes a very large value as compared with a case when the wheel tensioner 7 vertically moves since extension-contraction by secular elongation and humidity of a wire rope is a main cause. Therefore, only when an absolute value of a speed signal is not less than a prescribed value, it is judged as an abnormal condition, and an emergency control device 9c is actuated. When an absolute value of the speed signal is less than a prescribed value, operation of the car 5 is continued or either of a nearest floor stopping device 9b or an alarming device 9d is actuated by a moving distance of the wheel tensioner 7 without performing processing at all.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator control device, and particularly to a sheave traction and a load on a hoisting motor due to the weight of the main rope and control cable when the car is at the uppermost position and the lowermost position of the hoistway. The present invention relates to a compensator rope for making a constant change of the vehicle and a tension device for giving a constant tension to the compensator rope.

[0002]

2. Description of the Related Art FIG. 3 is a diagram schematically showing the entire structure of a conventional elevator, and FIG. 4 is a diagram showing the structure around a tensioning device provided at the bottom of the hoistway of FIG. In the figure, 1 is a sheave, 2 is a main rope, 3 is a counter, 4 is a control cable, 5 is a car, 6 is a compensating rope, 7 is a tensioning device, 7a is a tensioning sheave, and 7b is a guide rail. ,
7c is a cam, 8b is a tension switch, 9 is an elevator control panel, and 9c is an emergency stop device.

Not only in high-rise buildings but also in general buildings,
When the ascending / descending stroke exceeds 40 to 50 m, the traction of the sheave 1 and the hoisting motor (not shown) depend on the weight of the main rope 2 and the cable 4 depending on whether the car 5 is at the highest position or the lowest position of the hoistway. The load of) changes considerably. Therefore, the compensating rope 6 is used in order to make the load of the traction and the hoisting motor invariable throughout the entire stroke of the elevator hoistway. In this case, in order to apply a constant tension to the compensating rope 6, the tensioning wheel device 7 having the tensioning wheel sheave 7a and the position of the tensioning wheel device 7 are detected, and a tensioning wheel switch 8b for checking that tension is constantly applied. Equipped.

The elevator control panel 9 is a compensating rope 6
If the tension cannot be applied to the compensating rope 6 due to a breakage of the tensioning device 7 or the pit floor in the hoistway, or when the car 5 suddenly stops, the tensioning device 7 jumps and the guide rail 7b (see FIG. ), The tension switch 8b is disengaged from the cam 7c to detect an abnormality of the tension device 7, and the emergency stop device 9c is operated to suddenly stop the car 5.

[0005]

Although the conventional elevator control device has been constructed as described above, the conventional method for detecting an abnormality in the tensioning device has been used to detect wire ropes such as main ropes and compensating ropes over time. If there is no need to stop the car suddenly due to expansion or contraction of the wire rope due to changes in humidity or humidity, that is, if it can be operated until that time if adjusted for the next maintenance, the car will suddenly stop just like in an emergency Therefore, there is a problem in that the elevator may not operate properly and the door may be closed.

The present invention has been made to solve the above problems, and accurately detects the movement state of the tensioning device provided at the lowermost portion of the hoistway, and the vertical movement of the tensioning device is used for elevators. If the main cause is the expansion and contraction of the wire rope, avoiding a sudden stop and controlling the elevator depending on the situation to make the area in which the elevator can operate more appropriate and unnecessary. It is an object of the present invention to provide a better elevator control device that eliminates a sudden stop.

[0007]

In view of the above object, there is provided a control device for an elevator comprising a tensioning device for applying tension to a compensating rope at the bottom of a hoistway, which detects a moving speed of the tensioning device. The moving speed detecting means, the output processing means for processing the output of the moving speed detecting means, and the control means for controlling the stop of the car based on the processing result of the signal processing means. Located in the elevator controller.

In a second aspect of the present invention, the output processing means obtains an absolute value of the detected moving speed and compares it with a predetermined value, and the control means causes the absolute value of the moving speed to be a predetermined value or more. In the case of the above, the elevator control apparatus according to claim 1, wherein the emergency stop is performed.

According to a third aspect of the present invention, the output processing means obtains the absolute value of the detected moving speed and compares it with a predetermined value, and also obtains the moving amount of the tensioning device from the integrated value, and the control means is provided. However, if the absolute value of the moving speed is equal to or more than a predetermined value, an emergency stop is performed, and if the absolute value is less than the predetermined value, the nearest floor stop control is performed according to the magnitude of the moving amount, and a notification of the situation is given. The elevator control device according to claim 1, wherein the control device performs either one of the operation and the operation continuation.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of an entire elevator including an elevator control device according to an embodiment of the present invention.
In the figure, the parts denoted by the same reference numerals as those of the conventional ones of FIGS. 3 and 4 indicate the same or corresponding parts. 8a is a speed detection device, 90 is a control panel, 9a is a control device including a microcomputer (not shown) and a program for operating the same, 9b is a nearest floor stop device, 9c is an emergency stop device, and 9d is a notification device. is there.

The construction and operation of the tensioning device 7 and the like are the same as in the prior art, and a description thereof will be omitted. A speed detecting device 8a is installed at the center of the tension device 7. The speed detecting device 8a uses a tachometer or the like that outputs a positive or negative polarity corresponding to the moving direction of the tensioning device 7. For example, the main rope 2
When the tensioning device 7 moves downward due to the wire rope such as the compensator rope 6 and the like extending over time, "correct
(Plus) "is output. In addition, the wire rope contracts under the influence of humidity, and outputs "negative" when the tensioning device 7 moves upward.

Next, the operation will be described. If the compensating rope 6 is cut and the tensioning device 7 falls on the floor surface of the pit in the hoistway, the output polarity of the speed detector 8a installed in the center of the tensioning device 7 becomes positive. Moreover, the output value at that time becomes a very large value compared with the secular expansion of the wire rope and the expansion and contraction due to humidity. On the other hand, when the suspension device 7 bounces due to the impact of the car 5 suddenly stopping, the output polarity of the speed detection device 8a installed in the central portion of the suspension device 7 becomes negative.
Moreover, the output value at that time becomes a very large value in the negative direction as compared with the secular expansion of the wire rope and the expansion and contraction due to humidity.

FIG. 2 shows a flowchart of the operation of the control device 9a. (a) If at least one of the emergency stop device 9c and the nearest floor stop device 9b has already been operated, no new process is performed (step S101). If neither device is operating, first, a signal indicating the moving speed of the tension device 7 of the speed detection device 8a installed in the tension device 7 is input (step S102).

(B) Next, the absolute value of the input signal is calculated (step S103). (c) Next, the signal of the speed detection device 8a is integrated. In this case, a value corresponding to the vertical movement amount of the tension vehicle device 7 is calculated by integrating the positive and negative signs of the signal (step S
104). (d) Next, the absolute value of the integration result of (c) above is calculated.
(Step S105).

(E) Next, when the absolute value of the speed signal in (b) is not less than a predetermined value (for example, not less than 2 m / min), the tension device 7 is in an abnormal state of falling or bouncing. It can be determined that (step S106), the passengers of the elevator can be safely rescued by operating the emergency stop device 9c (step S109).

(F) Next, when the absolute value of the speed signal in (b) is less than the predetermined value, the tension device 7 is determined from the integration result in (d).
Check the movement amount of. The amount of movement is less than the first predetermined value
In the case of (for example, less than 0.5 m), the operation of the car 5 is continued without performing any processing (step S107). When the value is equal to or more than the first predetermined value, either the nearest floor stop device 9b or the notification device 9d is operated depending on the amount of movement.
(Step S108).

For example, if the movement amount is between 0.5 m and less than 1.0 m, the alarm device 9d is operated to notify the control panel, the building management room, the elevator maintenance company, or the like (step S111). When the movement amount is 1.0 m or more, the nearest floor stop device 9b is operated to stop the car 5 at the nearest floor (step S110).

In the above embodiment, the moving speed is integrated together with the moving speed of the tensioning device to obtain the moving amount.
Whether the movement of the tensioning device is a movement when the compensating rope is broken and falls on the tensioning device or the floor of the hoistway pit, or when the car suddenly stops and the tensioning device jumps off the guide rail. Can be determined only by the moving speed, and even if only the moving speed is calculated and compared with a predetermined value, a considerable effect can be obtained.

[0019]

As described above, in the elevator controller according to the present invention, it is possible to more accurately detect the movement state of the tensioning device provided at the lowermost portion of the hoistway, and to detect the vertical movement of the tensioning device.
When the expansion and contraction of the wire rope for elevators is the main cause, we do not make sudden stops, make the area where elevators can operate more appropriate, and eliminate unnecessary sudden stops. The effect that a favorable elevator control device can be provided can be obtained.

In particular, since the moving condition of the tensioning device is obtained as the moving speed of the tensioning device, the movement of the tensioning device causes the compensator rope to break and the movement of the tensioning device to the tensioning device or the floor surface of the pit in the hoistway. Is it necessary to make a sudden stop because the tensioning device bounces off from the guide rail due to the impact of falling or the car suddenly stopping, or because the wire rope expands and contracts mainly? It is possible to accurately detect whether or not there is nothing, and it is possible to obtain effects such as providing a better elevator control device.

Furthermore, the moving speed of the tensioning device is integrated with the moving speed to obtain a moving amount, and even if the moving speed does not exceed a predetermined value, the nearest floor stop control is performed depending on the moving amount of the tensioning device. , I made a notification of the situation and controlled the continuation of operation, so the wire rope stretches over time,
It is possible to provide an effect that an elevator control device can be provided that can appropriately respond to the situation, such as urging that it is time to repair.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an entire elevator including an elevator control device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the control device of FIG.

FIG. 3 is a diagram schematically showing the overall configuration of a conventional elevator.

FIG. 4 is a diagram showing a configuration around a tensioning device provided at a lower portion of the hoistway of FIG.

[Explanation of symbols]

1 sheave, 2 main ropes, 3 counter, 4 control cable, 5 car, 6 compensating rope, 7 tension car sheave, 7a tension sheave, 7b guide rail, 7c cam, 8a speed detection device, 9a control device, 9b nearest Floor stop device, 9c Emergency stop device, 9d Notification device 9
0 control board.

Claims (3)

[Claims] 1. A control device for an elevator, comprising a tensioning device for applying tension to a compensating rope at the bottom of a hoistway, comprising: moving speed detecting means for detecting a moving speed of the tensioning device; An elevator control apparatus comprising: an output processing unit that processes an output of a detection unit; and a control unit that performs a car stop control based on a processing result of the signal processing unit. 2. The output processing means obtains an absolute value of the detected moving speed and compares it with a predetermined value, and the control means performs an emergency stop when the absolute value of the moving speed is equal to or more than a predetermined value. The elevator control device according to claim 1, wherein the elevator control device is provided. 3. The output processing means obtains the absolute value of the detected moving speed and compares it with a predetermined value, and also obtains the moving amount of the tensioning device from the integrated value, and the control means gives the absolute value of the moving speed. If the value is equal to or greater than a predetermined value, an emergency stop is performed, and if the absolute value is less than the predetermined value, one of the nearest floor stop control, the notification of the situation, and the operation continuation is performed according to the magnitude of the movement amount. The elevator control device according to claim 1, wherein the control device performs control.