JPH1059644A - Elevator abnormality detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator abnormality detecting device preventing the erroneous detection of the abnormal rolling of a cord. SOLUTION: This elevator abnormality detecting device is provided with a rope rolling detecting means 1 detecting the change factors caused by the rolling of a rope and a car position detecting means 2 detecting the position of a car when the rolling of the rope is detected. The amplitude of the cord is calculated by a calculating means 4 based on the detected results of the means 1, 2 and the constants stored in a constant memory means 3. The difference between the calculated value of the amplitude calculating means 4 and the memory value of an allowable amplitude memory means 5 is calculated by a comparing means 6. Whether the amplitude of the cord exceeds the allowable amplitude or not is judged by a judging means 7 based on whether the result of the comparing means 6 is positive or negative. The result of the judging means 7 is transferred to the outside and an elevator control device by a transfer means 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator abnormality detecting apparatus, and more particularly to an elevator abnormality detecting apparatus having a suspended elevator strip.

[0002]

2. Description of the Related Art As a prior art, Japanese Patent Application Laid-Open No. 55-3577
No. 8 discloses a technique disclosed in Japanese Patent Publication No. In this technique, an abnormal rolling of the strip is detected by a detecting device that operates when the suspended elevator strip moves beyond a predetermined position.

[0003]

In the prior art, since the abnormal rolling of the strip is detected by the detecting means provided at the end of the strip, even if the strip is displaced beyond the same predetermined position. However, there was a problem that the amplitude of the stria differs depending on the position of the car.

Therefore, the predetermined position for reliably detecting the occurrence of abnormal rolling of the strip must be the lowest position when the strip is generating abnormal rolling.

[0005] As a result, depending on the position of the car, even if the amplitude of the strip is below the allowable value, the strip may be displaced beyond a predetermined position, and abnormal rolling of the strip may occur. There was a problem of false detection.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an elevator abnormality detecting device capable of preventing erroneous detection of an abnormality.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to an elevator having a suspended elevator strip, wherein the roll of the strip is detected for detecting a change factor accompanying the roll of the strip. Detecting means, car position detecting means for detecting the position of the car, constant storage means for storing the calculation constant of each strip for calculating the amplitude of each strip, and roll detection means for the strip Amplitude calculation means for calculating the amplitude of the strip from the output of the car position detection means and the stored value of the constant storage means, and an allowable amplitude storage means for storing an allowable value of the amplitude of the strip on which the elevator can travel normally, Comparing means for comparing the calculated value of the maximum amplitude calculating means with the stored value of the allowable amplitude storing means, determining means for determining whether or not the amplitude of the strip exceeds the allowable amplitude based on the result of the comparing means; External,
Alternatively, a transfer means for transferring the data to an elevator control device or the like is provided.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram of the present invention, and FIG. 2 is an explanatory view of the position of a detecting means. A elevator car 21 and a counterweight 22 are connected by a main rope 23, and a hoisting machine 25 installed in a machine room 24a. Travels up and down the hoistway 24b. A governor 26a for detecting the speed of the car 21 is installed in the machine room 24a, and a tension wheel 26b with a weight is installed in the pit 27 by a governor rope 26c partially supported by the car 21. A compensating rope 28 for compensating for a change in the weight of the main rope 23 due to the position of the car 21 and a tension wheel 29 for applying tension to the compensating rope 28 are installed in the pit 27. A tail code 31 for supplying power to the car 21 and transferring a signal in the car 21 to the control panel 30.

As described above, in an elevator having a suspended strip such as the main rope 23, the governor rope 26c, the compensating rope 28, and the tail cord 31, when vibration is generated in the building due to a strong wind, an earthquake, or the like, the strip may be damaged. Rolling occurs. The variable element accompanying the roll of the strip is detected by the roll detection means 1 of the strip. The change factors associated with the rolling of the strip are the displacement of the strip, or the displacement and acceleration of the pulley. The change element accompanying the roll of the strip is detected by the detecting means 1 by a contact type using a strain gauge or the like, or a non-contact type using a laser, an eddy current type or the like. The position of the car at the time of detecting the rolling of the strip is detected by the car position detecting means 2. The car position detecting means 2 presses a generator or the like against the rotating body or extracts control information of the control panel 30 to detect a change factor accompanying a change in the position of the car.
The amplitude of the striae is calculated by the amplitude calculating means 4 using the two types of detection results and the calculation constants of the respective striae necessary for calculating the amplitude stored in the constant storage means 3.

[0010] The permissible swing value of each of the members on which the elevator can run normally is stored in the permissible amplitude storage means 5. A comparison unit 6 compares the difference between the amount of lateral movement of the strip calculated by the amplitude calculation unit 4 and the allowable amplitude of the strip stored in the allowable amplitude storage unit 5.

The result of the comparing means 6 is positive or negative, and the judging means 7 judges whether or not the amplitude of the strip exceeds the allowable amplitude, that is, whether there is a possibility that the roll of the strip is entangled with the equipment in the tower.
The determination result is transferred to the outside or to the elevator control device 30 to cause the elevator to perform an earthquake control operation or to generate an alarm.

The constant storage means 3 and the allowable amplitude storage means 5 are arbitrarily set according to each strip.

FIG. 3 shows the relationship between the behavior of the compensating rope 28 when the position of the car 21 is changed and the amount detected by the detecting means 1. There is a state 51a where the car is on the top floor, a state 51b where the car is on the middle floor, and a state 51c where the car is on the lowest floor. When the position of the car is in this state,
Assuming that the compensating rope 28 rolls with an amplitude of 53a, the behavior of the compensating rope is as follows. The detected values are 52 and 52, respectively.
a1 and 52a2. From this, it can be seen that even if the amplitude of the compensation rope, that is, the stripe, is the same, the detected value of the detecting means 1 changes due to the change in the position of the car.

According to the present invention, the change in the amplitude of the strip due to the change in the position of the car is detected by the position detecting means 2 of the car and the roll detecting means 1 of the strip, and the amplitude of the strip is calculated by processing. It can be obtained accurately and erroneous detection can be prevented.

[0015]

According to the present invention, it is possible to accurately obtain the amplitude of the strip without being affected by the change in the position of the car, and to prevent erroneous detection of abnormal lateral roll of the strip.

[Brief description of the drawings]

FIG. 1 is a block diagram of the present invention.

FIG. 2 is an explanatory diagram of a position of a detecting unit.

FIG. 3 is an explanatory diagram showing a relationship between a lateral movement of a strip according to a position of a car and a detection amount.

[Explanation of Signs] 1 means for detecting the roll of the strip 2 means for detecting the position of the car 3 means for detecting the constant 4 means for calculating the maximum amplitude 5 means for storing the allowable amplitude 6 means for comparing 6 means for judging 8 means for transferring 21 21 car 22 counterweight 23 main Rope 24a Machine room 24b Hoistway 25 Hoist 26a Governor 26b Tensioner with weight 26c Governor rope 27 Pit 28 Compensation rope 28a Amplitude of compensation rope (top floor) 28a1 Amplitude of compensation rope (middle floor) 28a2 Amplitude of compensation rope (maximum) (Lower floor) 29 Tensioner 30 Control panel 51a Behavior of compensation rope (top floor) 51b Behavior of compensation rope (middle floor) 51c Behavior of compensation rope (lowest floor) 52 Detected value

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Atsushi Mikane 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Within Hitachi Building System Service Co., Ltd.

Claims (1)

[Claims] In an elevator having a suspended elevator strip, a strip roll detecting means for detecting a change factor accompanying the roll of the strip, and a car position for detecting a position of a car. Detecting means, constant storage means for storing the calculation constant of each strip for calculating the amplitude of each strip, outputs of the rolling detection of the strip and car position detecting means, and storage values of the constant storage means An amplitude calculating means for calculating the amplitude of the strip, an allowable amplitude storing means for storing an allowable value of the amplitude of the strip on which the elevator can travel normally, a calculated value of the maximum amplitude calculating means and a storage of the allowable amplitude storing means. A comparing means for comparing the values, a determining means for determining whether the amplitude of the striatum does not exceed the allowable amplitude from the result of the comparing means,
Alternatively, an elevator abnormality detection device comprising a transfer means for transferring the abnormality to an elevator control device or the like.