JPH06115837A - Abnormality detector of elevator - Google Patents

Abstract

PURPOSE:To provide an abnormality detector of elevator which can measure error in landing at floor of a cage without measuring the number of pulses of a pulse generator between floors at each story in advance. CONSTITUTION:When a position detector 3 passes a shield plate, a counter 21 which is a measurement means starts measurement of the number of pulses of a pulse generator 11 and ends the measurement when a brake operation signal which stops the operation of a rotating machine is input in the counter 21 from an elevator control circuit 10. The value p measured by this measurement and a set value 22 in the predetermined scope are compared by a comparator 23 which is a floor landing error abnormality judgement means. When the measured value p exceeds the set value 22, an abnormality detector judges that floor landing error abnormality has occurred, sends a signal to a communication device 30, and informs an abnormality to a monitoring center 40 from the communication device 3O via a communication line 35 such as telephone line.

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 device, and more particularly to an elevator abnormality detecting device for detecting an abnormality in the floor of a car.

[0002]

2. Description of the Related Art A conventional elevator abnormality detecting apparatus for detecting an elevator landing error is disclosed in Japanese Patent Laid-Open No. 1-3083.
As described in Japanese Patent No. 76, the number of pulses between floors is measured in advance using a pulse generator that generates a predetermined pulse according to the traveling of an elevator, and the car travels based on this measurement. Calculate the number of pulses between floors and the number of pulses from the pulse generator when the car actually travels, and use the difference as the landing error to land each time the car stops. The judgment was made as to whether or not the error was a permissible value.

[0003]

However, since the conventional elevator abnormality detection device has the above-described configuration, the number of pulses of the pulse generator between floors must be measured in advance, and the floor height value The measurement work becomes enormous as the value becomes larger, and the memory for storing the number of pulses for each floor value must be increased in capacity.

An object of the present invention is to provide an elevator abnormality detecting device capable of measuring the landing error of a car without measuring the number of pulses of the pulse generating device between floors in advance. .

[0005]

In order to achieve the above object, the present invention provides a shield plate and a stop position detection device provided on each floor in a hoistway and a car facing the floor, and a stop position detection device. In the elevator abnormality detection device including a pulse generator that generates a predetermined pulse and an abnormality detection device that detects the flooring error of the car, the flooring error of the car is in a positional relationship of zero. The stop position detecting device and the shield plate are attached so that the stop position detecting device is located at the center of the shielding plate, and the abnormality detecting device detects the shielding plate after the stop position detecting device detects the shielding plate. Measuring means for measuring the number of pulses of the pulse generator until the car stops, and a landing error for judging the abnormal landing of the car by comparing the number of pulses obtained by this measuring means with a set value. Characterized in that a normal determining means.

[0006]

The function of the elevator abnormality detecting device according to the present invention is as follows.
As described above, the number of pulses of the pulse generator from the time when the position detecting device detects the shield plate until the car stops is measured, and the measured pulse number and the pulse number corresponding to half the length of the shield plate are measured. The landing error is calculated by comparing with the set value, and when this landing error is out of the allowable value, it can be judged by the landing error abnormality judging means as the landing error abnormality. Therefore, it is not necessary to measure or store the number of pulses between floors in advance, and it is sufficient to simply measure the number of pulses of the pulse generator from when the position detecting device detects the shield plate until the car stops. , Can be a small capacity memory.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a layout view of a car and hoistway equipment that employs an elevator abnormality detection device according to an embodiment of the present invention. The car 4 connected to one end of the rope 5 is guided by a pair of guide rails 1 and is moved up and down, and a position detection device 3 is attached to an upper end portion on one side of the car 4 via a fixture. The position detecting device 3 detects the stop position of the car 4, has a substantially U-shaped shape, and has a magnet embedded in one of the U-shaped portions and a switch embedded in the other. Further, a shield plate 2 facing the position detecting device 3 is mounted on an extension portion of each floor in the width direction of the guide rail 1 via a mounting tool (not shown). This shield 2
Is a metal plate capable of magnetically shielding and operates a switch embedded in the position detecting device 3. When the shield plate 2 is inserted into the substantially U-shaped portion of the position detecting device 3, The magnetic field formed by the embedded magnet is shielded to activate the switch. When the car 4 is moving up and stops at the predetermined stop floor, deceleration is started at a considerable front of the stop floor, and when the switch embedded in the position detection device 3 passes through the shield plate 2, the shield plate 2 The magnetic field is shielded by the switch and the switch is actuated, whereby the brake is actuated and the car 4 traveling at a very low speed is covered by the shield plate 2.
Stops at an intermediate position in the longitudinal direction of. Shield plate 2 at this time
The positional relationship between the position detecting device 3 and the position detecting device 3 is as shown by the dotted line in FIG. 3, and the distance r until the car 4 is stopped by the operation of the switch is half the shielding plate 2 in the traveling direction of the car 4. The shielding plate 2 and the position detecting device 3 are attached at predetermined positions so that the landing error becomes zero at this time. In addition, the shielding plate 2 is attached to the car 4 side,
The position detecting device 3 may be provided on the hoistway wall side, but it is more economical to do as described above.

FIG. 1 is a block diagram showing an abnormality detecting device for an elevator according to an embodiment of the present invention. The elevator control device 10 performs overall control of the driving operation of the car 4, and controls the car 4 using the signals of the position detection device 3 and the pulse generator 11 described above. The abnormality detection device 20 detects whether or not the landing error of the car 4 is out of the predetermined set value range, and the counter 21, which is the measuring means, detects that the position detection device 3 has passed the shield plate 2. At this time, the measurement of the number of pulses of the pulse generator 11 is started, and the measurement is ended when the brake operation signal for stopping the operation of the rotating machine from the elevator control circuit 10 is input to the counter 21. Further, the comparator 23, which is a landing error abnormality determination means, compares the measured value p obtained by this measurement with the set value 22 within a predetermined range, and when the measured value p deviates from the set value 22, it is determined that the landing error is abnormal. , Sends a signal to the communication device 30, and the communication line 3 such as a telephone line from the communication device 30
The abnormality is notified to the monitoring center 40 via 5.

Next, an abnormality determination method by the above-described elevator abnormality detection device will be described with reference to the characteristic diagram of FIG. In FIG. 4, the horizontal axis represents the stop level which is the difference from the floor of the elevator car 4 as a reference, and the vertical axis represents the above-mentioned measured value p of the pulse number. The straight line 50 shows the relationship between the stop level during the ascending operation and the measured value p, and the straight line 51 shows the stop level during the descending operation and the measured value p.
It shows the relationship with. Normally, the shield plate 2 is adjusted so that the stop level falls within a predetermined value. However, for example, a stop level abnormality occurs due to a deceleration abnormality or the like, and the shield plate 2 is stopped at a distance less than half the distance r of the shield plate 2. if you did this,
The measured value p becomes small, and the car 4 stops before the predetermined position. This is a negative direction with respect to the landing floor when the car 4 is used as a reference during ascending operation, and a plus direction with respect to the landing floor when the car 4 is used as a reference during a descent operation. When the vehicle stops at a distance larger than the distance r, the measured value p increases and the car 4
Is overshooting the predetermined position. This is in the plus direction with respect to the floor when using the car 4 as a reference during the ascending operation, and is in the negative direction with respect to the floor when using the car 4 as a reference during the descending operation. Therefore, the set value for determining that the stop level of the car 4 is abnormal is, for example, −
In the range of 10 mm to +10 mm, the measured value p can be a normal value between the pulse number p1 and the pulse number p2 shown in FIG. 3, and when the pulse number p1 and the pulse number p2 at this time deviate, the cage It can be determined that the stop level of 4 is abnormal. In other words, when the number of pulses is smaller than p1 and when the number of pulses is larger than p2, it can be determined that the stop level of the car 4 is abnormal. As described above, in the present embodiment, the stop level of the car 4 is detected by the shield plate 2 provided on each floor every time the car 4 stops.
Since it is determined by activating, the processing can be performed in a short time with a small memory capacity.

[0010]

As described above, according to the present invention, the number of pulses of the pulse generator from the time when the position detecting device detects the shield plate to the time when the position detecting device stops is measured, and the measured number of pulses and the predetermined number of normal times are determined. Since the landing error is calculated by comparing it with the number of pulses, it is not necessary to measure the number of pulses of the pulse generator between floors in advance, and the memory for storing it is also unnecessary. , It is possible to accurately detect the landing error of the car with a small capacity memory.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main part of an abnormality detecting device for an elevator according to an embodiment of the present invention.

2 is a side view of a car using the elevator abnormality detection device shown in FIG. 1. FIG.

FIG. 3 is an enlarged view of a main part of FIG.

FIG. 4 is a characteristic diagram of the abnormality detecting device for an elevator shown in FIG.

[Explanation of symbols]

 2 Shielding plate 3 Position detection device 4 Car 11 Pulse generator 20 Abnormality detection device 21 Counter 23 Comparator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Kono 1-6 Kandanishikicho, Chiyoda-ku, Tokyo Inside Hitachi Building System Service Co., Ltd.

Claims (1)

[Claims] 1. A shield plate and a stop position detection device provided on each floor in a hoistway and a car facing the floor, a pulse generator that generates a predetermined pulse according to the traveling of an elevator, and the car. In an elevator abnormality detection device equipped with an abnormality detection device for detecting the landing error of
The stop position detection device and the shield plate are attached so that the stop position detection device is located at the center of the shield plate in a positional relationship where the flooring error of the car is zero, and the abnormality detection device is configured to stop the stop. Measuring means for measuring the number of pulses of the pulse generator from the position detecting device detecting the shielding plate until the car stops, and comparing the number of pulses obtained by this measuring means with a set value. An abnormality detecting device for an elevator, comprising: a landing error abnormality determining means for determining an abnormality in flooring of the car.