JP3313021B2 - Elevator control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an elevator, and more particularly to a load on a hoisting motor and a sheave traction due to the weight of a main rope and a control cable when a car is at an uppermost position and a lowermost position of a hoistway. The present invention relates to a compensating rope for keeping the change of the constant and a tensioning device for giving a constant tension to the compensating 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 pulley device provided at a lower portion of a hoistway in 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 choke device, 7a is a choke sheave, and 7b (FIG. 4) is a guide rail. ,
7c is a cam, 8b is a pulley switch, 9 is an elevator control panel, and 9c is an emergency stop device.

In general buildings as well as high-rise buildings,
If the hoisting stroke exceeds 40 to 50 m, the traction of the sheave 1 and the hoist 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 uppermost position or the lowermost position of the hoistway. ) The load changes considerably. Therefore, the compensating rope 6 is used to make the load of the traction and the hoist motor invariable throughout the entire length of the hoistway of the elevator. In this case, in order to apply a constant tension to the compensating rope 6, a pulley device 7 having a pulley sheave 7a and the position of the pulley device 7 are detected, and a pulley switch 8b for constantly checking that tension is applied. Is provided.

[0004] The elevator control panel 9 comprises a compensating rope 6.
If the compensating rope 6 can no longer be tensioned due to the breakage of the compensating rope 6 due to the dropping of the tensioning device 7 or the pit floor in the hoistway, or the impact of the sudden stop of the car 5, the tensioning device 7 jumps off and guide rails 7b (FIG. 4). ), The pulley switch 8b is disengaged from the cam 7c to detect an abnormality of the pulley device 7, and the emergency stop device 9c is operated to stop the car 5 suddenly.

[0005]

The conventional elevator control device is constructed as described above. However, in the conventional method of detecting an abnormality of the pulley device, a long-term wire rope such as a main rope or a compensating rope is used. It is not necessary to stop the car suddenly due to expansion and contraction of the wire rope due to changes in humidity.In other words, if the car can be operated up to that time if it is adjusted at the next maintenance, the car will be suddenly stopped as in the emergency However, there is a problem that the operation of the elevator may be poor, the door may be closed, or the like.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and accurately detects the moving state of a pulley device provided at the lowermost portion of a hoistway, and allows the vertical movement of the pulley device to be used for an elevator. If the expansion and contraction of the wire rope is the main cause, avoid sudden stops and control the elevator according to the situation to make the operable area of the elevator more appropriate and unnecessary An object of the present invention is to provide a better elevator control device that eliminates a sudden stop.

[0007]

DISCLOSURE OF THE INVENTION In view of the above object, there is provided an elevator control device provided with a pulley device for applying tension to a compensating rope at a lowermost portion of a hoistway, and detecting a moving speed of the above pulley device. Moving speed detecting means, output processing means for processing the output of the moving speed detecting means, and control means for controlling the stop of the car based on the processing result of the signal processing means. Located in the elevator control.

According to 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 determines that 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 an emergency stop is performed in the case of (1).

According to a third aspect of the present invention, the output processing means obtains an absolute value of the detected moving speed, compares the detected absolute value with a predetermined value, and obtains a moving amount of the pulley device from an integral value. However, when the absolute value of the moving speed is equal to or more than a predetermined value, the emergency stop is performed. When the absolute value is less than the predetermined value, the nearest floor stop control and the notification of a situation are performed according to the magnitude of the moving amount. The control device for an elevator according to claim 1, wherein the control device performs one of control of operation and continuation of operation.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an overall configuration of an elevator including an elevator control device according to an embodiment of the present invention.
In the drawings, the portions denoted by the same reference numerals as those of the conventional device in FIGS. 3 and 4 indicate the same or corresponding portions. 8a is a speed detecting device, 90 is a control panel, 9a is a control device including a microcomputer (not shown) and a program for operating the microcomputer, 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 overhanging device 7 and the like are the same as those in the prior art, and therefore description thereof is omitted. A speed detection device 8a is installed at the center of the overhanging device 7. As the speed detecting device 8a, a tachometer or the like that outputs positive or negative polarity in accordance with the moving direction of the pulley device 7 is used. For example, main rope 2
When the stretcher device 7 moves downward due to the wire ropes such as the compensating rope 6 and the compensating rope 6 extending over time,
(Plus) "is output. When the wire rope shrinks under the influence of humidity and the upholstery device 7 moves upward, “negative (minus)” is output.

Next, the operation will be described. If the compensating rope 6 breaks and the pulley device 7 falls on the floor of the pit in the hoistway, the output polarity of the speed detector 8a installed at the center of the pulley device 7 becomes positive. In addition, the output value at that time is a very large value as compared with the secular expansion of the wire rope and expansion and contraction due to humidity. On the other hand, when the choke device 7 jumps and jumps due to the impact of the sudden stop of the car 5, the output polarity of the speed detection device 8a installed at the center of the choke device 7 becomes negative.
Further, 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 processing is performed (step S101). If none of the devices is operating, first, a signal indicating the moving speed of the pulley device 7 of the speed detection device 8a installed in the pulley 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 detector 8a is integrated. In this case, a value corresponding to the amount of vertical movement of the overhanging device 7 is calculated by integrating the signal including the positive and negative signs (Step S).
104). (d) Next, the absolute value of the integration result of the above (c) is calculated.
(Step S105).

(E) Next, when the absolute value of the speed signal of (b) is equal to or more than a predetermined value (for example, 2 m / min or more), the abnormal condition in which the pulley device 7 falls or jumps and jumps. (Step S106), and by operating the emergency stop device 9c, passengers of the elevator can be safely rescued (Step S109).

(F) Next, when the absolute value of the speed signal of (b) is less than the predetermined value, the overhanging device 7 is obtained from the integration result of (d).
Check the amount of movement. Movement amount is less than 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). If the value is equal to or greater than the first predetermined value, either the nearest floor stop device 9b or the notification device 9d is operated according to the magnitude of the movement amount.
(Step S108).

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

In the above embodiment, the moving amount is obtained by integrating the moving speed together with the moving speed of the overhang device.
Whether or not the movement of the trolley device is when the compensating rope breaks and falls on the trolley device or the pit floor in the hoistway, or when the trolley device jumps off the impact of a sudden stop of the car and comes off the guide rail Can be determined only by the moving speed. 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 control device according to the present invention, the moving state of the pulley device provided at the lowermost portion of the hoistway is more accurately detected, and the up-down movement of the pulley device is performed.
When the main cause is the expansion or contraction of the wire rope for the elevator, the sudden stop is not performed, the area where the elevator can be operated is made more appropriate, and unnecessary sudden stop is eliminated. Advantageous effects such as providing a good elevator control device can be obtained.

In particular, since the moving condition of the sheave device is obtained as the moving speed of the sheave device, the movement of the sheave device is determined from the moving speed so that the compensating rope breaks and the stud device or the floor of the pit in the hoistway is moved. Is it necessary to stop suddenly due to the fall of the car or the sudden stop of the car and the jumper device jumping off the guide rail, or especially because of the expansion and contraction of the wire rope, it is necessary to make a sudden stop It is possible to accurately detect whether or not it is of an insignificant degree, and to obtain effects such as providing a better elevator control device.

Further, the moving amount is obtained by integrating the moving speed together with the moving speed of the overhanging device, and even if the moving speed does not exceed a predetermined value, the nearest floor stop control is performed according to the moving amount of the overhanging device. , So that the notification of the situation and the control of the continuation of the operation were performed, the wire rope grew with the use over time,
The effect of being able to provide an elevator control device that can take appropriate measures according to the situation, such as prompting that it is time to repair it, is obtained.

[Brief description of the drawings]

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

FIG. 2 is a flowchart illustrating an operation of the control device of FIG. 1;

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

FIG. 4 is a diagram showing a configuration around a pulley device provided at a lower portion of the hoistway of FIG. 3;

[Explanation of symbols]

1 sheave, 2 main ropes, 3 counters, 4 control cables, 5 cars, 6 compensating ropes, 7 overhauling device, 7a overhauling sheave, 7b guide rail, 7c cam, 8a speed detecting device, 9a control device, 9b Floor stop device, 9c Emergency stop device, 9d Notification device 9
0 Control panel.

Claims (3)

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