JPH09272669A - Inspection method and device for elevator weighing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily inspect a weighing device without applying load equivalent to load capacity by detecting vibration generated by excitation of a riding car floor by an acceleration detector, operating this vibration value to a load value equivalent to the value loaded on the riding car floor, comparing it with over capacity load, and inspecting the weighing device. SOLUTION: An inspection device 9 composed of an acceleration detector, a CPU, a ROM, a RAM, a display, etc., is arranged on a floor of a riding car 1. A detection switch 8 of a weighing device and the inspection device 9 are connected to each other by a signal conductor 10. Vibration is applied on the bottom of the riding car 1 in its stopped state, the vibration value is detected by the acceleration detector, and its operation value is stored in the RAM. An operational signal is inputted from the detection switch 8 via the signal conductor 10 in operating the weighing device the vibration acceleration value at its timing is read out from the RAM, the recorded gravitational acceleration value and the total weight of the riding car 1, a measuring person, and the inspection device 9 are read out by the CPU and substituted for a prescribed equations stored in the ROM, and the load conversion value is displayed on a display.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator weighing device inspection method and an inspection device for inspecting whether a weighing device for detecting a load value of a car normally operates.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 3, an elevator car 1 has a car frame 3 on a lower frame 4 of a car frame 3 suspended by a rope 2 with an elastic body 5 such as a vibration-proof rubber interposed therebetween. The bottom portion 7 of the chamber 6 is placed and configured. The cage 1 configured as described above is provided with a weighing device, and the weighing device includes a detection switch 8 arranged on the lower frame 4 facing the bottom portion 7, It is formed by a circuit including a power supply V connected to the detection switch 8, a buzzer B, and a control relay R. Then, the weighing device detects an overload value of the load in the car room 6 by an operation according to a change in the distance between the lower frame body 4 and the bottom portion 7 of the detection switch 8 and gives an alarm by the buzzer B. The passenger M is controlled by issuing a signal or stopping the operation of the elevator by the control relay R. An example of such a scale device is disclosed in Japanese Utility Model Laid-Open No. 54-63365.

The loading overload value of the car 1 is usually set to 110 to 125% of the rated loading load, and the elastic body 5 is compressed and displaced when the set load is applied. It is adjusted so that the detection switch 8 is operated by being pressed by the bottom portion 7.

By the way, this weighing device needs to regularly inspect whether the detection switch 8 operates properly when the set overload value is reached. The inspection method is a test weight. The actual load inspection method of bringing the above into the car room 6 and applying an actual load was adopted. However, this method has a problem in that a great amount of labor is required for transporting the test weights and loading and unloading the test weights on the car 1.

Therefore, in the prior art, in order to solve this problem, the bottom portion 7 is mechanically displaced to the side of the lower frame body 4 to make the elastic body 5 have the same condition as when the load is overloaded, and the detection switch is used. The operation of No. 8 was confirmed, and the weighing device was detected.

[0006] As an example of the structure for forcibly displacing the cab bottom portion 7 as described above, Japanese Patent Publication No. 63-13139, Japanese Patent Publication No. 56-17412, and Japanese Patent Laid-Open No. 58-11.
The disclosure can be found in Japanese Patent No. 9574, Japanese Patent Laid-Open No. 56-11321, and the like.

[0007]

However, even in the above-mentioned prior art, in order to perform the inspection, a device for forcibly displacing the bottom portion 7 to the lower frame body 4 side by a force equivalent to the load overload. Must be attached to the bottom portion 7 and the lower frame body 4, operated, and removed after the inspection is completed, but such work puts a heavy burden on the inspector and requires a lot of time. However, there was a problem that the inspection efficiency was deteriorated.

An object of the present invention is to solve the above-mentioned problems in the prior art and to provide an inspection method and an inspection apparatus for an elevator weighing apparatus, which can easily inspect the weighing apparatus.

[0009]

In order to achieve the above object, the present invention provides a method for inspecting an elevator scale device for checking the operation of a scale device for detecting an overload in a car, wherein the car floor is The vibration generated by applying the vibration is detected by an acceleration detector, and the detected vibration value is calculated as a load value equivalent to that applied to the car floor, and the calculated value and the overload value for loading are calculated. By contrasting
It is characterized in that the weighing device is inspected.

Since the present invention employs the above-described inspection method, the weighing device can be easily inspected without applying a load equivalent to the loading load, and one-person operation can be realized.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings, taking a home elevator as an example. FIG. 1 is a vertical cross-sectional view of a hoistway showing an overall configuration of a home elevator to which an embodiment of the present invention is applied. The same reference numerals as in FIG. 3 indicate the same parts.

In FIG. 1, 10 is a signal line of a detection switch, 11 is a sheave, 12 is a hoisting machine, 13 is a counter weight, 14 is an upper pulley, 15 is a pulley, 16 is a counter side thimble rod, and 17 is a car side. It is a thimble rod.

As shown in the figure, in the home elevator, the detection switch 8 forming the weighing device is installed on the car side thimble rod 17, and the operation is performed by the load applied from the car 1 via the rope 2. The spring 17a of the car side thimble rod 17 acts on the spring 17a to contract, and in synchronization therewith, the contact plate 17b is also displaced downward, and the displacement of the detection switch 8 fixed to the contact plate 17b is also lowered by this displacement, and It is configured to operate by hitting the adjusting bolt 18 adjusted to the height. In addition, 9 is an inspection device for the weighing device installed in the car 1, and the inspection device 9
The configuration of is shown in FIG.

FIG. 2 is a block diagram showing the structure of the inspection device 9. In this figure, 19 is an acceleration detector, 20 is a scale device operation signal, 21 is weight, 22 is an input section, 23 is a computing section including a microcomputer, 24 is an output section, and 25 is a display section.

The arithmetic unit 23 includes an A / D converter 23a, a central processing unit (CPU) 23b, a clock 23c, and a CP.
ROM (read only memory) 23d for storing the processing procedure of U23b, storage unit RAM for storing the result of the operation unit
(Random memory) 23e.

The acceleration detector 19, the calculation unit 23, and the display unit 25 may have different structures, or all of them may have an integrated structure.

Further, the acceleration detector 19 and the arithmetic unit 23 may be integrally structured, and the display unit 25 may be separately structured.
On the contrary, the acceleration detector 19 has a different structure, and the calculation unit 23
The display unit 25 and the display unit 25 may be integrated.

In particular, in recent years, a portable computer equipped with a display unit has been developed, and a maintenance person carries it to a work site and uses it for maintenance work. The calculation unit 23 and the display unit 2 are used.
5 can also be configured by the portable computer.

Next, the operation of the above embodiment will be described.

At the time of the scale device operation confirmation inspection, the inspector gets on the car 1 and installs the inspection device 9 on the floor of the car 1 as shown in FIG.

Next, the inspector turns on the inspection device 9 and then, before measuring the weight of the car and the total of his own weight and device weight, which are the coefficients necessary for the load conversion formula during operation of the weighing device, before the elevator is measured. It is input to the inspection device 9 of the weighing device and stored in the RAM 23. Since this value changes depending on the weight of the worker at the measurement site and the model of the elevator to be adjusted, anyone can perform the measurement.

Next, the detection switch 8 and the inspection device 9 are connected by the signal line 10. In addition, if the signal line 10 is pulled into an unillustrated driver's panel in the car 1, it is possible to save the trouble of performing the inspection again. After completing the above preparation,
The zero point correction of the acceleration detector 19 is performed, and when the car 1 is stopped, the bottom 7 of the car 1 is vibrated by bouncing, for example, to vibrate. By vibrating the car 1 in this way, the acceleration detector 19 detects the vibration value of the car 1. Then, this vibration value is transmitted to the CP via the input unit 22 and the A / D converter 23a.
Input to U23b, CPU23b, clock 23c
The vibration value for each time interval is calculated for each constant time obtained by using, and the calculated value is stored in the RAM 23e.
In addition, this similar processing is repeated until the detection switch 8 operates.

The operation signal 20 from the detection switch 8 is input from the signal line 10 and the input section 22 during operation of the weighing device, and the vibration acceleration value a at that timing is stored in the RAM 23e.
Gravity acceleration g recorded in the ROM 23d in advance, the car weight 1M recorded in the RAM 23e before the measurement, the total weight of the measurer and the device m
Is read by the CPU 23b and is substituted into the following equation stored in the ROM 23d.

(W: load conversion value during operation of the weighing device, M: 1 weight of the car, m: total weight of the measuring person at the time of measurement, total device weight, a: vibration acceleration value, g: gravitational acceleration) The load conversion value of the operation of the weighing device necessary to give a subduction amount equal to the instantaneous subduction amount is the CPU.
23b and displayed on the display unit 25. The measurement is finished when the signal is received.

The operator can determine whether or not the operation of the weighing device is normal simply by looking at the displayed value. If the value does not match, readjustment is performed by the adjusting bolt 18.

As described above, it is not necessary to apply a load equivalent to an actual loading overload to inspect whether or not the weighing device of the car 1 is normal, and the inspection can be easily performed by the maintenance itself. Therefore, the operation inspection time of the weighing device can be shortened and the labor can be reduced. Further, the present invention can be applied to the weighing device having the detection switch 8 at the lower part of the cab shown in FIG.

[0027]

According to the present invention, a worker applies vibration in a passenger compartment and uses an inspection device to inspect a loaded overload value based on a converted value of an operating state of a weighing device.
Since it is not necessary to actually load a load equivalent to the loading load into the car, the weighing device can be easily inspected in a short time, and a one-person operation can be realized.

[Brief description of drawings]

FIG. 1 is a main part sectional view of a home elevator to which the present embodiment is applied.

FIG. 2 is a block diagram showing a configuration of an inspection device to which an embodiment of the present invention is applied.

FIG. 3 is a schematic view of a car showing a detection method of a conventional weighing device.

[Explanation of symbols]

 1 Car 2 Rope 3 Car frame 4 Lower frame 5 Elastic body 6 Car room 7 Car bottom 8 Detection switch 9 Inspection device 10 Signal line for detection switch 11 Sheave 12 Hoisting machine 13 Counterweight 14 Upper pulley 15 Pulley 16 Counter side Thimble rod 17 Car side thimble rod 17a Spring 17b Abutment plate 18 Adjustment bolt 19 Acceleration detector 20 Scaler operation signal 21 Weight 22 Input section 23 Calculation section 23a A / D converter 23b Central processing unit (CPU) 23c Clock 23d ROM 23e RAM 24 Output section 25 Display section

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Noriyuki Sabota 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Co., Ltd. Inside Hitachi Building System Services (72) Inventor Kenichi Fujitani 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Shikisha Hitachi Building System Services

Claims (5)

[Claims] 1. A method for inspecting an elevator weighing apparatus for confirming the operation of a weighing apparatus for detecting a loading overload in a car, wherein an acceleration detector detects vibration generated by vibrating the car floor, By calculating the detected vibration value into a load value equivalent to that applied to the car floor, and comparing the calculated value with the loading overload value,
An inspection method for an elevator weighing apparatus, which comprises inspecting the weighing apparatus. 2. An elevator scale inspection device for confirming the operation of a weighing device for detecting an overload in a car, and an acceleration detector provided on the car floor for detecting vibration generated on the car floor. An elevator scale device comprising: a calculation unit that calculates a load value corresponding to the load applied to the car floor from the vibration value; and a display unit that displays the calculated value when the scale device is operating. Inspection equipment. 3. The method for inspecting an elevator scale apparatus according to claim 1, further comprising: a means for vibrating the floor of the car by a vibration performed by an operator who has boarded the car. 4. The method of inspecting an elevator scale apparatus according to claim 1, wherein the weight of the car, the weight of the operator and the total weight of the measuring instruments are input for each measurement as the conditions for the conversion formula of the load value. . 5. The conversion formula for converting the detected vibration value into a load uses the weight value of the car, the total weight value of the operator and the measuring instrument, and the vibration value of the car during operation of the weighing device. The method of inspecting an elevator scale device according to claim 1.