JPH05155553A - Velocity monitoring device for elevator - Google Patents

Abstract

PURPOSE:To provide an elevator velocity monitoring device capable of monitoring any abnormality regarding control of an elevator in all positions within a range where normal traveling of a cage is possible and of performing safe and ensured action of detecting abnormalities. CONSTITUTION:The velocity and the position of a cage are computed according to pulse signals emitted from a pulse generator 10 and a comparing portion 16 is provided to which both the results of these computations and acutation signals from floor selection switches provided on each floor are inputted and which then compares data on the travel of an elevator under normal conditions with one another for computation so as to monitor abnormalities.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an elevator speed monitor.

[0002]

2. Description of the Related Art As one of elevator safety devices, there is a governor device which is legally required. It constantly monitors the speed of the elevator, 130% of rated speed
It is a device that has the function of interrupting the safety circuit and emergency stop of the elevator. Also, the main rope was cut, etc.
Due to mechanical factors, if the safety circuit alone does not reduce the speed and the speed increases further, it has the function of mechanically stopping the basket when reaching 140% of the rated speed. This is for the worst case, such as the main rope being cut as mentioned above. However, this is not the worst case, and the speed will be 130% different from the rated speed for some reason, and even if the vehicle is stopped in an emergency, it will give a great shock to passengers. To prevent such a situation,
In general, a method of providing various control monitoring circuits to detect abnormalities before the operation of the governor device and decelerate the elevator so as not to make passengers uncomfortable and stop at the nearest floor Has been taken.

In particular, if the position is within a distance (deceleration distance) required for decelerating from the rated speed to stop and approaching the lowest floor and the uppermost floor (terminal floor), and if the speed is not less than the rated speed, the vehicle passes through the terminal floor. It will stop and it will stop outside the range where it can run. In this case, a safety switch provided on the hoistway that detects that the car has stopped outside the travelable range operates, shuts off the safety circuit in the control panel, and puts the elevator into a permanent stop state.
To recover from this state to normal, an inspector of an elevator service company who has specialized knowledge short-circuits the safety switch for detecting the out-of-driving range, manually drives it to the in-driving range, and then switches the short-circuited switch. It was necessary to carry out dangerous work such as returning to. This return work takes time, which leads to a reduction in service efficiency for passengers.

As a preventive measure in such a case, a limit switch for detecting the car position of the elevator is provided at a certain distance from the terminal floor, and the speed of the elevator when the switch operates is less than a certain ratio of the rated speed. Otherwise,
A method of forcibly decelerating was adopted by outputting a deceleration command from the control panel to the motor.

[0005]

However, in the method of detecting the control abnormality by the combination of the operation of the distance detection switch from the terminal floor in the hoistway and the speed condition, the distance detection is mechanical and the car shakes etc. However, there is a problem that there is a possibility that accurate detection may not be possible due to limitations due to mechanical factors.

Therefore, an object of the present invention is to provide an elevator speed monitor capable of monitoring a control abnormality of an elevator at any position within a range where a car can normally travel, and capable of performing a safe and reliable abnormality detection operation. It is in.

[0007]

SUMMARY OF THE INVENTION To achieve the above object, the present invention is based on a pulse generator for generating a pulse signal synchronized with the traveling of an elevator car, and a pulse signal from the pulse generator. Pulse calculation means for calculating the speed and car position of the car, a switch that issues an operation signal when the car reaches the floor with a car installed on each floor, speed change during normal running between all floors, car A travel data storage unit that stores the position change and the operation signal timing of the switch, and a car speed, a car position, and the operation timing of the switch when the car is actually traveling are input and stored in the travel data storage unit. There is provided a speed monitoring device for an elevator, comprising: a comparison / determination means for performing a comparison calculation with the travel data to determine an abnormal portion.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a system configuration diagram of an elevator speed monitoring device according to an embodiment of the present invention.

In FIG. 1, an elevator car 1 is connected to a counterweight 3 via a wire rope 2,
Using the frictional force between the sheave 5 of the hoisting machine 4 and the wire rope 2, the sheave 5 that is rotated by the rotational force of the motor 6 moves up and down. A safety switch 7 is provided near the lowermost floor and the uppermost floor of the hoistway to detect the entry of the car out of the travelable range of the car and to stop the elevator in an emergency.
Also, it is installed near the bottom and top floors of the hoistway,
A limit switch 8 for detecting the abnormal speed of the car and forcibly decelerating, and a control panel 9 for controlling the operation of the elevator.
A pulse generator 10 which is mounted on the shaft of the motor 6 and generates a pulse proportional to the rotation direction and number of the motor 6, a detection plate 11 provided in the hoistway for detecting the car position, and a car. The provided proximity switch 12 is provided. The control panel 9 is provided with an arithmetic circuit 13 for calculating the traveling distance and speed from the cumulative frequency and number of pulses from the pulse generator 10 and for inputting the operation signal of the proximity switch 12 to check the consistency. There is. FIG. 2 is a block diagram of the arithmetic circuit 13.

The arithmetic circuit 13 receives a pulse signal from the pulse generator 10 and calculates the speed of the car and the pulse count value (car position). The pulse arithmetic unit 14 operates normally during all floor-to-floor traveling. State, that is, from the traveling data storage unit 15 that stores the speed change and pulse count values of all traveling types and the operation timing of the proximity switch 12 as traveling pattern data, and the current car speed, pulse count value, and proximity switch 12. Inputting the operation signal, and inputting the data corresponding to the current traveling pattern stored in the traveling data storage unit 15 and comparing and calculating the deviation, the comparison unit 16 and the car call or Compares next-generation driving pattern data based on running commands determined by a controller (not shown) that controls elevator operation based on hall calls A command to output to the running data storage unit 15 to the section 16, and input the judgment result of the consistency from the comparing unit 16, and in the case of any abnormality, a command to stop the elevator to the nearest floor The pulse calculation unit 14 includes a speed conversion unit 18 that converts a pulse signal into speed data, and a count unit that counts the pulses of the pulse signal. It is composed of 19 and. FIGS. 3 to 6 show the processed pulse from the pulse generator 10 attached to the shaft of the motor 6, and show the speed and the count value as a waveform.

The pulse signal from the normal pulse generator 10 is
As shown in FIGS. 3 (a) and 3 (b), the waveforms are input as one-phase and two-phase waveforms. … (A), (a). The traveling distance can be obtained by detecting the rotation direction based on the phase difference between the two-phase waveforms (a) and (a) as shown in FIG. 3 and counting the speed by the frequency. At this time, FIGS. 4 and 5 show the waveform calculated by the pulse calculation unit 14, and FIG. 4 shows the waveform when the car is raised.
The waveform when the car descends is shown. Here, the waveform A represents the traveling speed waveform, and the waveform B represents the change in the pulse count value. FIG. 6 shows the operation of the operation signal from the proximity switch 12, but this waveform must be the same if the floors traveling are the same. Next, the operation of the arithmetic circuit 13 will be described with reference to FIGS.

First, FIG. 7 shows the construction of the hoistway as an embodiment.
Show. Stop floor number 6, elevator speed 60m / min, acceleration / deceleration
0.5 m / sec² 1-2 floor height 3m, 2-3 floor height 2.5
m, 3-4 floor height 3.5 m, 4-5 floor height 3 m, 5-6 floor height 2.
5m, assuming that one pulse is generated every 5mm, from the first floor to 6
The traveling pattern when traveling to the floor is shown in FIG.

When passing the 2nd-5th floor, 60m / min, that is, 1
Since it is m / sec, the operation timing of the proximity switch 12 is the value obtained by dividing the height of each floor by the speed, and 2.5 m / 1 for the 2-3 floor.
m / sec = 2.5sec. The same calculation can be done when passing through the 3rd and 5th floors. Further, the speed at this time is constant at 1 m / sec, and the pulse count number increases with a constant inclination.

Further, it is accelerating until the second floor is passed, and if the acceleration is assumed to be constant from the start, the traveling pattern to the second floor in FIG. 8 is obtained. Similarly, since the 5th to 6th floors are decelerating, the pattern after passing the 5th floor in FIG.

Therefore, the comparing unit 16 sequentially indicates the current speed,
The pulse count value and the operation signal of the proximity switch 12 are sent. The comparison unit 16 sequentially compares the sent real-time data with the data sent from the traveling data storage unit 15, determines whether there is an abnormality based on the calculation result, and simultaneously determines the abnormal portion. I do.

For example, if the operation of the proximity switch and the speed match, and the pulse count values do not match, the speed is also a conversion of the pulse frequency, so that the pulse generator 10 and the proximity switch 12 have the same speed. Is not abnormal, and it can be determined that the counting unit 19 is abnormal. Similarly, abnormal combinations as shown in Table 1 can be made, and each can be judged.

[0017]

[Table 1]

As shown in Table 1 above, when the abnormal portion can be judged from the contents of the abnormal state, the data of the abnormal portion is sent to the main control unit 17 and the deceleration command is output, and the main control which received the deceleration command. The unit 17 outputs a nearest floor stop signal to a control device (not shown) that controls the operation of the elevator, and stops the car 1 at the nearest floor. At that time, the main control unit 17 stores the error code corresponding to the abnormal place at the same time, and informs the inspector who came to the failure investigation with a display (not shown) or the like, so that the failure can be efficiently dealt with. To do so.

FIG. 9 is a diagram showing an example of a traveling pattern at the time of service between floors. It should be noted that in actual traveling, the ride comfort is not good when the acceleration changes linearly, so that the acceleration is generally rounded, and it also changes depending on the elevator adjuster. Therefore, it is necessary to store in the travel data storage unit 15 the correct travel pattern data when actually traveling on each floor after the adjustment.

[0020]

According to the present invention, there is provided an elevator speed monitoring device capable of monitoring a control abnormality of an elevator at any position within a range where a car can normally travel, and capable of performing a safe and reliable abnormality detection operation. be able to.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of an elevator speed monitoring device of the present invention.

FIG. 2 is a block diagram of an arithmetic circuit according to the present invention.

FIG. 3 is a waveform diagram of a pulse signal of the pulse generator of the present invention.

FIG. 4 is an output waveform diagram of the pulse calculation unit of the present invention.

FIG. 5 is an output waveform diagram of the pulse calculation unit of the present invention.

FIG. 6 is an operation timing chart of the proximity switch of the present invention.

FIG. 7 is an operation explanatory diagram of the arithmetic circuit of the present invention.

FIG. 8 is an operation explanatory diagram of the arithmetic circuit of the present invention.

FIG. 9 is an operation explanatory diagram of the arithmetic circuit of the present invention.

[Explanation of symbols]

1 ... Basket, 10 ... Pulse generator, 12 ... Proximity switch, 14 ...
Pulse calculation unit, 15 ... Running data storage unit, 16 ... Comparison unit.

Claims (1)

[Claims] 1. A pulse generator for generating a pulse signal in synchronism with the traveling of an elevator car, pulse calculating means for calculating the speed and the car position of the car based on the pulse signal from the pulse generator, and each floor. A switch that emits an operation signal when reaching the floor with a car provided, a traveling data storage unit that stores speed changes during normal traveling between all floors, car position changes, and operation signal timing of the switches, When the car is actually traveling, the car speed, the car position, and the operation timing of the switch are input, and comparison and judgment means for making a comparison operation with the travel data stored in the travel data storage unit to judge an abnormal portion are provided. An elevator speed monitor characterized by being provided.