JPS58104881A - Method of measuring braking force of brake in rope type 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 The present invention relates to a method for measuring brake braking force in a rope elevator, and in particular, a brake braking force suitable for easily measuring braking force due to dynamic friction using a simple meter. This relates to a method for measuring.

Rope type elevators are designed to hold the car with nine brakes on the hoisting machine when the elevator is stopped. In order to check the holding force of the elevator, it is necessary to measure the braking force of the brakes. Conventionally, in order to estimate the braking force of an elevator that has been installed, it is necessary to
The method used was to load 50 to 200% weight and calculate the load at which the brakes would slip. As a result, a large amount of weight is required, and the car may slip, which is dangerous.

The present invention has been made in view of the above, and its purpose is to provide a rope-type elevator that can easily measure the braking force due to dynamic friction using a simple electric meter without applying any load to the seats. An object of the present invention is to provide a method for measuring braking force in -.

A feature of the present invention is that the torque generated by the hoisting machine is based on the amount of unbalance between the car and the counterweight, and the torque generated by the hoisting machine is determined based on the amount of unbalance between the car and the counterweight. The braking force of the upper pi brake is determined from the torque and is found at 9 points.

An embodiment of the method of the present invention will be described in detail below with reference to FIGS. 1 and 2.

FIG. 1 is an explanatory diagram showing the schematic structure of a rope elevator. In Fig. 1, 1 is a passenger seat, 2 is a counterweight, 3 is a rope, 4 is a hoisting machine, and 5 is a magnetic brake.
In order to efficiently use the hoisting machine 4 within the full load range, the weight of the 9-car car on the opposite side of the car 1 must be balanced by 40 to 50% of the rated carrying load. A car 2 is provided, and a car 1 and a weight 2 are suspended from a hoist 5 in a hanging shape □ with a rope 3. The torque characteristics for this rounding and hoisting 2□ machine 40th power Sheet and 1 loading rate are (.

As shown in the lX2 diagram, the rising operation characteristic -1! The characteristic is such that U intersects with the downward driving characteristic curve.

In Fig. 2, the area where the generated torque is positive is the area where the hoisting machine 4 is generating torque, and the negative area is where the hoisting machine 4 is acting as a generator and applying braking. , a point B where the upward operating characteristic curve U and the downward operating characteristic curve intersect.
P is the loading rate at which the weight on the car side and the weight on the mating side are balanced, and this is called the balance point, and the loading rate at this balance point BP is based on the elevator completion inspection record. It's leftover perilla.

In addition, the torque Tt generated by the hoisting machine 40 at this time is a cost due to running resistance, etc., and can be better determined by measuring the torques TNU and TND during no-load up and down operation. can.

Therefore, if the loading rate at BP (balance point) is known, TL can be calculated from equation (i) by measuring the torques TNυ and TND generated during no-load up and down operation. If the balance point) BP is determined, then Figure 2 can be obtained.

Here, when the elevator is operated upward with the magnetic brake 5 in the braking state under a no-load load, the torque generated by the hoisting machine 4 will be as shown in FIG.
TmK changes from 'r11v. This amount of change is due to the braking force of the magnetic brake 5 (l), so the loading rate corresponding to this generated torque Ts is determined by the hoisting machine generated torque TI in the no-load rising operation characteristic curve U in Fig. 2. It can be determined as the loading rate Lm at the corresponding point A, and this loading rate corresponds to the braking force of the magnetic brake 5.

Therefore, in the method of the present invention, the braking force is measured by the following procedure.

(1) First, the torque generated by the hoisting machine (for example, armature current) TWW during no-load upward operation is measured.

(2) Next, measure the hoisting-like generated torque (for example, armature current) Too during no-load descending operation.

(3) Find TL using equation (1).

(4) Barrier point) Since the loading rate at BP is known, in Fig. 2, the position of point BP is determined from this loading rate and Tc obtained in (3), so the above T
Create Figure 2 using WW and T) III.

(5) Next, measure the torque (for example, armature current) Ts generated by the hoisting machine during no-load upward operation with the magnetic brake 5 in FIG. 1 activated.

(6) Using FIG. 2, find the loading ratio Lm relative to Tl in the manner described above. This L■ becomes the loading rate corresponding to the brake braking force.

In the above method, the braking force is converted into the loading rate by proportional calculation based on the loading rate of the balance point (BP), so the absolute value of the torque generated by the hoisting machine 4 must be determined. First, the braking force can be determined simply by measuring the physical quantity 15 proportional to the generated torque, for example, the armature current of the hoisting machine (electric motor) 4.

Therefore, according to the embodiment of the method of the present invention, the magnetic brake braking force of the installed rope elevator can be measured by simply preparing a simple electric meter without having to prepare a large amount of test 2 weights as in the conventional method. can be measured. Furthermore, since only the loading and unloading of test weights is required during measurement, measurement time can be significantly reduced. Additionally, everything can be done in the machine room, improving safety.

In a DC galley elevator, the torque generated by the hoisting machine is proportional to the armature current, so it is sufficient to measure the armature current of the hoisting machine, but it is better to measure the voltage proportional to the armature current. Needless to say, it is okay.

As explained above, according to the present invention, there is an effect that the braking force due to dynamic friction can be easily measured using a simple electric meter without applying any load.

[Brief explanation of the drawing]

Fig. 1 is a schematic structural diagram showing an example of a rounded rope-type elevator to explain an embodiment of the method for measuring braking force in a rope-type elevator according to the present invention, and Fig. 2 is a schematic structural diagram showing an example of a round rope-type elevator. FIG. 3 is a relationship diagram between the torque generated by the hoist and the torque generated by the hoisting machine. ,. 1... Car, 2... Two matching weights, 3...
Rope, No. t[2Il 8- No. ZI71

Claims (1)

[Claims] 1. In a four-wheel elevator, in which the car and the two mating heads are suspended from the hoisting machine by ropes,
The torque generated by the hoisting machine is calibrated based on the amount of unbalance between the car and the comb head, and the torque generated by the hoisting machine is determined by calibrating the torque generated by the hoisting machine when the brake is kept in a braking state and the hoisting machine is operated with no load. A method for measuring brake braking force in a rope elevator, characterized in that the braking force of the brake is determined from the torque.