JPS6181379A - Balancer for elevator - 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 an elevator weighing device for detecting the load of a car.

[Conventional technology]

Conventionally, for single-passenger or sleeper elevators, as stated on page 305 of the 1984 edition of [Explanation of technical standards for elevators and escalators] (published by the Japan Elevator Association), the load (the maximum load that can be loaded when actually used) is (which serves as a design standard (the same shall apply hereinafter)), a warning will be issued if the value is significantly exceeded.

It is designed to prevent the entrance door from closing.

Conventional examples thereof are shown in FIGS. 4 to 7.

First, in Figures 4 and 5, (1) is the basket, (2)
basket door, (3) basket floor, (3a) basket floor (3
) reinforcing material, (4) is the upper frame, (5) is the top of the upper frame (4)
(6) a vertical frame fixed to and erected on both sides of the car (1);
(7) is a lower frame whose both ends are fixed to the lower ends of both vertical frames, and (7) is a pair of lower frames that are erected on the upper surface of this lower frame (6) and are in contact with the attached members (3b) at both ends of the car floor (3). As the elastic support, vibration-proof rubber is used in this conventional example. (8) is a connecting rod that connects the attached member (3b) of the part corresponding to this vibration isolating rubber (7), (9) is a load detection means attached to the lower frame (6), and ) Due to the distortion of the vibration isolating rubber (7) due to the load on the roof, the connecting rod (8) moves up and down together with the gutter floor (3), resulting in a live load of 1154 (hereinafter referred to as "1154").

This is called the working load. ), the contacts will close and open.

Next, in FIG. 5, (+) and (→ are control power supplies.

(9a) and (9b) Normally open contacts and normally closed contacts of the load detection means (9) that close and open when an operating load or more is placed on the base and floor (3), 0α is for lifting and lowering the car (1) This is a well-known operating circuit, and the details will be omitted. 01) is a buzzer.

Next, we will discuss the operation.

There is generally hysteresis in the distortion of the root protection rubber (7).

In other words, when the load on the car floor (3) is increased, the relationship between load and strain is E→
A-, B. Conversely, when decreasing the load, curve (b
) and move from B to C- to D.

Therefore, it is assumed that the load is increased from the no-load state and the strain becomes d when the operating load is 9 pt. When the load is further increased to P2, the strain becomes d2. When the load is reduced from this state and returned to the operating load Pl, the strain becomes (Itt, which is a larger value than the strain d when it increases.If the load is further reduced 3) and becomes Pa, The distortion becomes do. According to our test results, for elevators with a live load of 750 to 9.

Pt - Pa = 23. I Kp It became.

The operation of the car (1) when the anti-vibration rubber (7) has hysteresis will be described.

Now, when the load is less than the operating load 21, the normally closed contact (9b
) remains closed, and the cage (1) is the detection means (9).
will not activate and prevent you from driving.

By the way, suppose that traffic is congested and a load of PTT located between the load P3 and the operating load P1 is placed on the shaft (1), resulting in the state at point F in FIG. Since the load detection means (9) is not operating, the passenger thinks that he can still ride and gets into the car (1). Therefore, the load becomes Pt2 and it moves to point G. The load detection means (9) is activated and the buzzer (
11) sounds. When the passengers know that the elevator has become inoperable, the last person to get on the elevator gets off at the heel (1), and the load becomes pH again.

However, at point 2 H, the distortion does not return to its original value and remains above dO, continuing to prevent operation. Therefore, another person descends from Kato (1) and the load becomes Pt3 and becomes 2.
When it moves to point ■, the contact (9b) closes for the first time and the operation circuit +1 (It becomes ready for operation. Also, the buzzer 1l
l) is also stopped.

In this way, once the load detection means (9) is activated, it will continue to operate even if the last passenger gets off the foot (1).
As a result, another person had to descend from Mokato (1), reducing transportation capacity.

Furthermore, if the last person to get on the train and the load detection means (9) is activated for that purpose, it is natural that the last person will get off from the heel (1). However, there remains a psychological inseparability for the other person who has to go down from (1) with the last person. For this reason, it takes a long time before deciding to get off the car (1), and
) departure will be delayed. When the load detection means (9) is activated, it is when the traffic in the building is congested and the car (1) is activated.
) departure delays reduced transportation capacity and became a major obstacle in eliminating congestion as soon as possible.

[Problem that the invention seeks to solve]

As mentioned above, in the conventional elevator operating system.

Because the anti-vibration rubber (7) has hysteresis, this anti-vibration rubber! In the load detection means (9) which is activated by the strain of the sensor 71, once activated, the load must be smaller than the load at the time of activation in order to return to the secondary state.

In other words, the detection accuracy was low. For this reason, in an elevator where the departure is prevented by the load detection means (9), the departure prevention cannot be canceled unless another person gets off in addition to the last person who got on the heel (1), and the transportation capacity decreases. There was a problem.

This invention was made to solve the above problems, and aims to provide a weighing device with high detection accuracy.

[Means for solving problems]

The elevator weighing device according to the present invention increases the load on an elastic support that generates hysteretic strain due to the load of the car, and detects the load inside the car from the strain at that time. and a second load detection means for detecting the load in the car from the distortion caused by decreasing the load, and when the load increases, the first load detection means is enabled. When the load decreases, the load inside the car is detected via a discrimination means that activates the second load detection means.

[Effect]

The elevator weighing device in the invention is .

When the load increases, it is detected separately by the first load detection means, and when the load decreases, it is detected separately by the second load detection means.

[Embodiments of the invention]

An embodiment of this invention will be described based on FIGS. 1 to 3.

In the figure, (W,) is the strain (du) for one actuation force PI on the straight line (,), which is the characteristic when increasing the load.
(Wa) is the characteristic when decreasing the load, and the second load detection device is activated at the strain (dci) for the 2-actuation surgical weight P1 on the straight line (b), (Wa) is the characteristic when decreasing the load. Wr) is the strain (a) on the straight line (a) with respect to the load (Pr) when the strain (du) occurs on the straight line (b).
The third load detection device (We) detects the distortion (de) on the straight line (a) for the load (I8) that is 55 to 9 (equivalent to the weight of one person) less than the load (Pr). This is the fourth load detection device.

■) is a yellow signal light that lights up when the fourth load detection device (We ) is activated, and +211 is the third load detection device (W
(2) is an inverter that inverts the output signal of the first load detection device (Wu);

(23) is an inverter that inverts the output signal of the second load detection device (Wd), and 124) is a discrimination means for determining whether or not the signal of the second load detection device (Wd) is valid. , in this example, the second load detection device (wd)
A memory is used which is set by the signal and reset by the two door closing completion signal. 12ω is an AND element to which the output of the memory l] and the inverter @ are input, □□□) is an OR element to which the door closing completion signal and the output of the AND element +25) and the output of the inverter are input, and (5) is this OR element. Element□□
This is an operation circuit that becomes ready for operation when the output of □) is at a high level (hereinafter referred to as H signal).

Next, we will discuss the operation.

First, when the load is less than Pe shown in FIG. 3, the load detection means is used. ) to (wd) are all open.

Signal light (a) c! 1) will not light up. The output of the inverter @ is an H signal, the output of the OR element (a) also becomes an H signal, and the operating circuit becomes ready for operation.

When the load reaches the range of pe and pr, the fourth load detection device (
'we) is activated and the yellow traffic light ■ lights up. Display indicates that one more person can fit on board. At this time as well, the driving circuit
is ready for operation.

At this time, in a strange situation where the load has barely exceeded I8, even if the second person gets on board, the load may still be between Pe and P.Then, the load may be close to the load Pr.In this state When one more person gets on the vehicle, the load that causes distortion dd exceeds Pv.

That is, the weight for one person is usually 55Kp to 60Kp, and the difference between the load Pv and the load Pr is 46Kg.

Therefore, the load detection devices (W, ) to CLOSE0 all operate. Therefore, the red traffic light (21) lights up and the inverter C
The outputs of 2Z and I23 are both at low level (hereinafter referred to as L signal). Further, the memory stores that the second load detection device (Wd) has been activated. The output of AND element 1 becomes an L signal, and since a person is still getting on or off the vehicle, the door closing completion signal is also an L signal. For this reason, OR
The element (a) becomes an L signal and the operating circuit becomes inoperable. Therefore, if the last person to get on the train gets off from the heel (1), the load will return to Pr again. But the distortion is d
It becomes u. At this time, the second load detection device (Wd) returns after being activated once, so the output of the inverter (2) becomes an H signal. In addition, the memory 124+ is connected to the second load detection device (
Since it remembers that Wd) has been activated, it outputs an H signal. For this reason.

The outputs of the AND element and OR element (support) are both)
■It becomes a signal and makes the operation circuit □□□ ready for operation. That is, the heel (1) is ready for operation regardless of the operation of the first load detection device (Wu).

Next, the load is at the xL1 point between Pr and Pl, and the third
It is assumed that the load detection device (Wr) is activated and the red signal light (21) is lit. At this time, if one more person gets on board, all of the load detection devices CWe) to (Wd) are activated, and operation of the load detection devices CWe) to (Wd) is prevented. For this reason, the last 1
A person descends from the heel (1). At this time, although the load becomes the value before boarding, it returns to the yarn point due to hysteresis, and the strain exceeds du.

However, as described above, unless the output of the AND element becomes the H signal, the car (1) becomes operable.

Next, suppose that another person gets into the vehicle where the load originally exceeded Pl. Of course load detection device (We)
~(Wd) are all activated and become inoperable.

For this reason, the last person to get on the train will get off from the heel (1). However, since the load originally exceeded Pl.

The strain becomes more than dd, and the load detection device (we) ~ (W
d) continues to operate. For this reason, the inverter □□□, @
Both outputs become L signals, and the OR element (a) outputs the L signal. And the driving was stopped and it became 9
Prevents operation with a load exceeding the operating load P1.

According to the above embodiment, when the load increases, the anti-vibration rubber (
A first load detection device (W,) that detects the operating load P1 from the distortion of the vibration isolating rubber (7) when the load decreases, and a second load detection device (W,) that detects the operating load P1 from the distortion of the anti-vibration rubber (7) when the load decreases.
Wd), the detection accuracy is improved.

Therefore, even if a person gets on the heel (1) and the first load detection device (W,) is activated, making it impossible to depart,
If the person who activated the first load detection device (Wu) gets off the train, the second load detection device (Wd) can detect that the operating load has fallen below P1. Therefore, there is no need to unnecessarily descend from Kato (1).

It can reduce the decline in transportation capacity.

In the above embodiment, the second load detection device (Wd) detects the operating load P when reducing the load, but it is assumed that the second load detection device (Wd) detects a load smaller or larger than the operating load P1. Good too. However, since the detection accuracy decreases, if the load is set smaller than the operating load P1, there is a strong tendency that two people will have to get off the train to eliminate the inoperability. Also.

The detected load of the second load detection device (Wd) is the operating load pt
It may be set to a value larger than . However, in this case as well, the detection accuracy is lowered, so it becomes possible to operate with a load exceeding the operating load P1, and there is a strong tendency that two people will have to get off the train. However, in both cases, the operating load P
If it is around i, the intended purpose can be achieved.

Further, although vibration-proof rubber is used as the elastic support in 9, a spring body may also be used.

〔Effect of the invention〕

As described above, the present invention is an elevator weighing device that detects the load of a car by using an elastic support that has hysteresis in the strain caused by the load. A load detection device and a second load detection device that detects the load from distortion when reducing the load are provided, and the first load detection device and the second load detection device are used separately to detect the load inside the car. Therefore, even if there is hysteresis, accurate load detection is possible.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 3 show an embodiment of the present invention. FIG. 1 is a vertical sectional view of the car showing the main parts, FIG. 2 is an electric circuit connection diagram, and FIG. 3 is an explanatory diagram. Figures 4 to 7 show a conventional elevator weighing device, where Figure 4 is a side view of the car, Figure 5 is a cross-sectional view taken along the line V-V in Figure 4, a view equivalent to Figure 1, and Figure 6. is an electric circuit connection diagram, and FIG. 7 is an explanatory diagram. In the figure, (1) is the cage, (7) is the vibration-proof rubber (elastic support)
. (Incorporated) is a memory (discrimination means), (Wu) is a first load detection device, and (Wd) is a second load detection device. Note that the same reference numerals in Figure 9 indicate the same or equivalent parts.

Claims (1)

[Claims] The load inside the car can be calculated using an elastic support body in which the strain when the load is increased to a predetermined load is different from the strain when the load is decreased to the above predetermined load. A first load detection device that detects the load in the car from distortion when the load is increased, and a second load detection device that detects the load in the car from the distortion when the load is decreased. A detection device is provided, and the load in the car is detected by a discrimination means that enables the first load detection device when the load increases and enables the second load detection device when the load decreases. Elevator weighing device.