JPS5974876A - 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 [Technical Field] The present invention relates to a load detection method for a rope elevator.

[Prior art]

As a conventional method for detecting the load of a rope elevator, the common method is to construct the car in a double layer (a double-layered structure in which a load detection device is provided between the car frame and the corner of the car).

Usually, a vibration isolating rubber is used between the car frame and the corner (2) to prevent vibration propagation, and the load is detected by measuring the amount of deflection of the car frame. The reality is that the accuracy of load detection is not very good due to age-related changes in the vibration damping rubber, non-linearity of deflection, creep, etc.In contrast, a A method in which a gauge-type load detector (hereinafter referred to as a load cell) is placed to measure the load (load detection is even more accurate than the second method). Although detection is possible, it has the following drawbacks.

■ There are usually several points (about 4 points) of anti-vibration rubber between the car frame and the car.If you use load cells for this number and electrically total them and use them as a load detector, the load cells are usually expensive. Because of this, there are a large number of load cells, so the overall load detector functions as a station-side load detector.

■ Reduce the number of load cells by using load cells at some of the multiple support points of the anti-vibration rubber. Detection load (= the resulting error is the fifth largest).

■ Normally, the output voltage of a load cell is very small (several mV), and an appropriate amplifier is required to transmit the detected signal to the control device.

■ An adder is required if the load cell output at point u is electrically summed.

Another method is to use the support point that supports the hoisting machine to detect changes in the load applied to the hoisting machine. Usually there are 4 or more points, so the above-mentioned ■.

It has the same drawbacks as ■ and ■.

[Purpose of the invention]

The present invention provides a support point for supporting the hoisting machine in a machine room in which the hoisting machine is installed (2) a load detector for detecting changes in load is provided to perform inexpensive and accurate load detection (2).

[Summary of the invention]

The present invention provides an elevator on which a hoist is placed by providing a plurality of support points at the support member opening (at least one of the support points is
A load detector is installed in the part, or a plurality of support points are supported with anti-vibration rubber. The load detection is done in the machine room.

[Embodiments of the invention]

Embodiments of the invention will be described below with reference to the drawings.

(Fig. 1 ial l ti)) (Secondly, on the machine bed 1 (two deflection sheaves 2 are installed, the motor 3 and the output side it two king sheaves 4 are installed, and the lower part (two is the deflection sheave 5) A main rope 6 is wound around the end of which a rider 7 and a comb 8 are suspended.The lower left and right ends of the machine bed 1 (2 are perpendicular to the main frame of the machine bed 1 to support the device) In this direction, the framework 1a is protruded downward (two parts are integrally divided into two parts) to constitute a hoisting machine M.

This hoisting method is for the building side, and for this installation, there are multiple support points A for the support member 9 that is fixed to the building side.

It is supported by B, C, and D (in this example).

In the above-mentioned multiple point support method, vibration isolating rubber is usually used, and in the present invention, at least 751 and 7 of these support points are suspended, so that the load on the passengers changes greatly, and the influence of the load is maximized. At the supporting point A of the main sheave 4 (two near 1111), attach the anti-vibration comb 10 as shown in FIG.

Point D is a spacer 12 that adjusts the height of the load cell 11
(1) 13 in l indicates the car hanging length L%.

The above-mentioned structure (two functions) is shown in FIG. 4, which is an explanatory dimensional drawing example of the plan view of the hoisting machine shown in FIG. 1.

Here, let the gaps between the hanging center 13 of the car 7 and points A, B, C, and D be 4 as shown in Fig. , The changes in the load shared by points B, C, and D are roughly as follows (-).

B crystal x blind xw 3 LJ I Th x T1 x W Here, for example, 11 = 160, l12” 260
, ls = 1000.

When A4 = 200 and W = 1000 kg, the load changes at points A, B, C, and D are 516 and 1, respectively.
03, 63, and 318 kg (-), it can be seen that the load change at point IA is very large compared to the load change at other points (2).

The change in load 1 at this large point A (load cell 11
It has the following advantages: It is possible to detect the load in the car to the power of 2 and 9.

■ The number of load cells is small. In this example, you can score 1 point.

This can be done at a much lower cost.

■ Good spirit. No difference in height occurs due to changes in the position and distribution of the load within the car.

■ Since there is only one load cell, no adder is required, and the cost is accordingly low.

■ Method of detection in the car (compared to the other two) Since the detection is carried out in the elevator machine room, the transmission distance to the control pole R is short.Therefore, no transmission amplifier is required.

■ By placing the load cell in a position close to the main rope connected to the rider, as shown at point A in Figure 1, the load constantly applied to the load cell (-increasing the load change to be measured by comparison) Can be done.

[Other embodiments of the present invention]

In the above explanation, there is only point A as the load cell mounting position (explained with one load cell mounting position, but for example, point A and point D, point A and point B)
It is also possible to use a point or a point A and a point C. Of course, it is also possible to select points like B and C, but in this case, it goes without saying that the accuracy of (=) decreases.

Further, in the above explanation, the load cell is arranged in series with the vibration isolating rubber, but the load cell can also be mounted at, for example, point P and point Q in FIG. 1 (1) (-).

In addition, in the above explanation, although two hoisting machines with gears have been explained, for example, the same applies even if there are two hoisting machines of a gearless elevator without gears.

[Overall effect]

As explained above, the load inside the car can be detected by detecting the load at one part (for example, one point) of the two supporting points of the building gutter structure of the elevator hoisting machine using, for example, a load cell.
It is possible to provide an elevator load detector which is cheaper than the second one, has good accuracy, and is hardly affected by aging, creep, non-linearity, etc. of the vibration isolating rubber.

[Brief explanation of drawings]

3 is a detailed enlarged view of points B, C, and D in FIG. 1, and FIG. 4 is an explanatory diagram of FIG. 1(a). M...Hoisting machine A, B, C, D...Support point 9...Support member 10...Vibration isolating rubber 11...Load detector (load cell). (7317) Agent Patent attorney Noriyuki Chika (and 1 other person) Figure 1 (0-) (b) Figure 2 Figure 3 Figure 4/3

Claims (2)

[Claims] (1) An elevator in which a support member is provided with a plurality of support points and an unwinding machine is placed thereon, and at least one of the support points is provided with a dual load detector. (2) The a number of support points are constructed of vibration-proof rubber, and (-1) two load detectors are installed in series at at least one or more support points. elevator.