JPH02225277A - Getting-on/off position detector for elevator cage - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for detecting the position at which an elevator car passes the midpoint of a hoistway when carrying out a load test of an elevator.

[Conventional technology]

Elevators must undergo a load test in accordance with JISA4302 upon completion.

In this load test, a load is placed inside the elevator car, and the current is This is to record each value of voltage and speed on the needle side.

Conventionally, the method for detecting this intermediate point was for inspectors to visually observe floor indicator lamps installed on the elevator machine room control panel.
When the floor indicator lamp corresponding to this intermediate floor lights up, the inspector gives a signal, and with this signal, another inspector looks at the instruments, measures and records the voltage, current, and speed values mentioned above. do.

[Problem to be solved by the invention]

Especially in elevators with long lifting and descending processes where elevator balancing ropes or balancing chains are not installed, the current of the drive motor changes due to the difference in the unbalanced weight of the main rope when the elevator car travels at different positions. .

Therefore, since the lighting position of the floor indicator lamp and the midpoint of the elevator car position in the hoistway do not completely match, there is a problem in that the balance point of the elevator cannot be accurately detected from this current value. .

SUMMARY OF THE INVENTION The object of the present invention is to provide a device for accurately detecting intermediate points, which overcomes the above-mentioned drawbacks.

[Means to solve the problem]

The purpose of this is to equip the machine room with a position detection device that detects when the elevator car is located at the midpoint of its operating stroke from the top floor to the bottom floor of the hoistway, and a sound device that sounds based on this position detection device. This is achieved by

[Effect]

By using this detection device, it is possible to detect the exact timing at which the elevator car and the counterweight intersect. This makes it possible to know the exact value of the balance point.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure shows the overall configuration of this embodiment.

In the figure, 1 is the hoistway, 2 is the bit at the bottom of hoistway 1, 3, 4.5 are the top floor, intermediate floor, and bottom floor, 81 is the distance between the bottom floor 5 and bit 2, and S2 is the top floor. This is the distance between floor 3 and pit 2.

6.7 is the cage and counterweight installed in hoistway 1,
It travels up and down within the hoistway 1 via a rope 9 by an electric motor 8. A pulse generator 10 is directly connected to the shaft of the electric motor 8, and generates pulses proportional to the rotation angle of the electric motor 8.

, 11 is a position detection device composed of a microcomputer, which includes an l1013 that takes in the output of the pulse generator 10 to the CPU 12, a RAM 14 that stores the distance traveled by the elevator car, and an RA that stores the distances SL and S2.
M15, and a comparator 16 that detects that the distance SO and the distance 1ll (S2-5L) 72 match,
Reference numeral 8 denotes a sounding device provided in the machine room 17 which sounds for a predetermined period of time when the output of the comparator 16 is generated, and is switched by a switch 19.

Next, the operation of the present invention will be explained with reference to FIG.

First, the distance Sl, 82 for the elevator car to travel from the bottom floor to the top floor is stored in the RAM 15 (Tl).Firstly, when the switch 19 is closed during the load test, for example, from the top floor to the bottom floor Start towards. The distance So (T2) increases or decreases in real time in proportion to the traveling distance of the car, and the value of this SO is equal to the distance (S2-8l)/2
When it matches (T3), the sound device 18 emits a signal sound (T4).
occurs. Therefore, since the inspector reads the current value at the timing of this signal sound, it is possible to accurately measure the balance point at the midpoint of the hoistway.

Although this embodiment has been described using a device using a microcomputer, position detection using a mechanical floor selector may also be used. Also, by using the signal output from the comparator 16 at this intermediate point as the trigger source for the hold signal of the measuring instrument.

The readings from the measuring instruments can be read automatically.

〔Effect of the invention〕

As described above, according to the present invention, when carrying out a load test on an elevator, it is possible to accurately detect in the machine room that the elevator car has reached the midpoint of the hoistway, so that the correct balance point can be measured. . Additionally, there is no need for a person to visually check the first-floor floor indicator lamps and give signals at intermediate points, resulting in a reduction in personnel.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing the operation of the present invention. 1...Hoistway, 6...Elevator car, 11.
...Position detection device composed of a microcomputer,
18...Sounding device, 17...Machine room. Figure Figure

Claims (1)

[Claims] (1) An elevator car characterized in that a machine room is equipped with a position detection device for detecting that the elevator car is located at an intermediate point of a hoistway, and a sounding device that responds to the position detection device. Hoistway position detection device.