KR100365316B1 - brake and traction force detector for elevator - Google Patents

Abstract

The present invention relates to an elevator braking force and traction force detection device of a new structure that can detect the braking force and traction force applied to the elevator relatively simple and accurate.

According to the present invention, a drive motor 10, a brake 20 for stopping the drive motor 10, a rope pulley 30 rotated by the drive motor 10, and the rope pulley 30 In an elevator comprising a car 43 and a balance weight 45 connected to and lifted by a rope 40 hanging on the brake, the brake is installed on the power line 25 or the brake 20 of the brake 20. A braking detection unit 50 for detecting a rotation detection sensor 59 for detecting a slip distance and a braking speed when braking is installed on the rotation shaft 15 connected to the driving motor 10, and the braking detection unit ( 50) and the rotation detection sensor 59 is connected to each of the elevator brake detection, characterized in that it comprises a display unit 57 is built in the memory unit 58 to calculate and display the braking distance or braking speed or braking acceleration, etc. An apparatus is provided.

Description

Brake and traction force detector for elevators

The present invention relates to an elevator braking force and a traction force detection device, and more particularly to a new structure of the elevator braking force and traction force detection device to be able to detect the braking force and traction force applied to the elevator relatively simple and accurate.

In general, an elevator is a mechanical device that carries passengers while being lifted up and down along a hoistway vertically formed in a building. Although elevators are lifted by a hydraulic type, a hoisting method using a wire rope is the mainstream.

As shown in FIG. 1, the hoisting elevator includes a motor 10 installed in the machine room 3 above the hoistway 1, a brake 20 for stopping the motor 10, and the motor 10. Rope pulley 30 is interlocked with, and the car 43 and the balance weight 45 integrally connected to the rope 40 is caught on the rope pulley (30).

Accordingly, when the driving motor 10 is operated, the rope pulley 30 is rotated and the rope 40 caught on the rope pulley 30, the car 43 and the balance weight 45 suspended on the rope 40 are rotated. As the car 43 moves closer to the desired floor, it is stopped by the brake 20.

However, when the elevator is operated for a long time, the brake 20 and the rope pulley 30 are worn, and the braking force and the traction force are reduced, so that it is necessary to adjust or replace them properly for safe driving. In order to determine such adjustment or replacement time, the braking force and the traction force applied to the elevator must be measured first.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an elevator braking force and traction force detecting apparatus of a new structure that can detect the braking force and traction force applied to the elevator relatively easily and accurately.

1 is a perspective view of a conventional elevator

2 is a block diagram of a braking force detection device according to the present invention

3 is a block diagram of a traction force detecting apparatus according to the present invention

<Description of the symbols for the main parts of the drawings>

10: drive motor 15: rotation axis

20: brake 25: power line

30: rope pulley 40: rope

43: car 45: counterweight

50: braking detection unit 55: slip detection sensor

57: indicator 58: memory

59: rotation detection sensor

According to the present invention, a drive motor 10, a brake 20 for stopping the drive motor 10, a rope pulley 30 rotated by the drive motor 10, and the rope pulley 30 In an elevator comprising a car 43 and a balance weight 45 connected to and lifted by a rope 40 hooked on the power supply, the power line 25 of the brake 20 is provided to supply power to the brake 20. A brake detecting unit 50 for detecting whether the brake plunger of the brake 20 is operated by detecting whether or not the brake plunger 20 is operated, and detecting the operation time of the brake 20, and the driving motor 10. Rotation sensor 59 is installed on the rotary shaft 15 connected with the rotation detecting sensor 59 for detecting a slip distance from the brake detecting unit 50 to the elevator stop after the operating time of the brake 20 is detected, The memory unit 58, the timer 55, the microcomputer 5 are connected to the copper detecting unit 50 and the rotation detecting sensor 59, respectively. 6) is built in each of the braking distance, the braking speed or the braking speed or braking acceleration using the initial slip speed at the time of braking and the stop until the elevator stops, characterized in that it comprises a display (57) An elevator braking force detection device is provided.

According to another feature of the invention, the drive motor 10, the brake 20 for stopping the drive motor 10, the rope pulley 30 rotated by the drive motor 10, and the rope pulley In an elevator comprising a car 43 and a balance weight 45 connected to and lifted by a rope 40 hooked to 30, the brake is installed on a rotation shaft 15 connected to the drive motor 10 to drive the brake. The rotation sensor 59 for detecting whether the motor 10 is stopped and the rope 40 are installed at the periphery of the rope 40 and the elevator is detected after the driving motor 10 is stopped from the rotation sensor 59. It is connected to the slip detection sensor 55 and the rotation detection sensor 59 and the slip detection sensor 55 for detecting a slip distance between the rope pulley 30 and the rope 40 until the stop, and the memory unit ( 58, the timer 55, the microcomputer 56 is built in each of the slip distance or slip speed between the rope 40 and the rope pulley 30 Or an elevator traction force detecting device is provided, comprising an indicator 57 for calculating and displaying slip acceleration.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a block diagram showing an embodiment of a braking force detection device according to the present invention. Referring to this, the elevator braking force detection device is connected to the power line 25 of the brake 20 is installed on the brake detecting unit 50 for detecting the braking time and the rotating shaft 15 connected to the drive motor 10 Rotation detection sensor 59 for detecting a slip distance during braking, and the braking detection unit 50 and the rotation detection sensor 59 are respectively connected to calculate and display a braking distance or an initial speed or a braking acceleration time of the braking time. It consists of an indicator 57.

The brake 20 is braked while the power is supplied to lift and lift the elevator, and a braking force is applied to stop the elevator when the power is turned off. In this case, as shown in FIG. 1, since the car 43 and the counterweight 45, which have a very large load, are suspended by the elevator, even if the brake 20 tries to stop it, the slip is not immediately stopped by the inertia force. Is generated.

In this case, the braking force detection device can detect the braking time accurately by detecting the time when the braking detection unit 50 is connected to the power line 25 of the brake and the power is cut off while the power is supplied to the brake 20. The rotation detection sensor 59 is installed on the rotation shaft 15 connected to the driving motor 10 to measure the slip distance during braking. In this case, the brake detection unit may be installed in the brake and a limit switch for detecting the operation of the brake plunger may be applied.

In addition, the indicator 57 is connected to the braking detection unit 50 and the rotation detection sensor 59, respectively, the memory unit 58, the memory switching circuit, the timer 55, the microcomputer 56 is built-in, When braking is detected by the brake detecting unit 50 when the power supplied to the brake 20 is cut off, the slip distance data sensed by the rotation detecting sensor 59 is transmitted to the indicator 57 and the slip distance is detected. And the slip speed of the initial braking is calculated and displayed externally and stored in the memory unit 58.

In addition, when the slip distance and the braking speed are used, the slip acceleration can be calculated by the following equation ①, and when the slip acceleration is used, the braking torque can be calculated by the equation ②.

2as = v ₁ ² -v ₂ ² (v ₁ = final speed, v ₂ = initial speed)

a = (v ₁ ² -v ₂ ² ) / 2s ,,,,,,,,

Braking force (braking torque) = (M _{counterweight} -M _car ) × a _Slip × R _{Rope pulley} ,,,,,,,,

Where a = slip acceleration and R = radius of the rope pulley, the indicator 57 is provided with a separate input unit to input the balance weight 45, the flat of the car 43 or the radius data of the rope pulley 30, etc. Then, the braking force is automatically calculated and displayed.

On the other hand, the traction force detection apparatus according to the present invention, as shown in Figure 3, is installed on the rotary shaft 15 connected to the drive motor 10, the rotation detection sensor 59 for detecting the stop point of the drive motor 10 And, it is installed on the periphery of the rope 40 connected to the car 43 and the balance weight 45 of FIG. 1 to detect the slip distance between the rope pulley 30 and the rope 40 after the driving motor 10 stops. It is connected to the slip detection sensor 55, the rotation detection sensor 59 and the slip detection sensor 55, respectively, and the memory unit 58, the memory switching circuit, the timer 55, the microcomputer 56 is built-in rope And an indicator 57 which detects and displays the slip distance between the 40 and the rope pulley 30 or the speed or acceleration at the time of slip generation.

The rope 40 is in the state spanning the rope pulley 30, as shown in Figure 1 on both sides of the car 43 and the balance weight 45 of the very large load is suspended, so that the drive motor 10 and the rope pulley ( Rope 40 slips from rope pulley 30 even if 30 is stopped by brake 20. In addition, since the slip phenomenon is generated as it is when the car 43 is moved up and down by the drive motor 10, it is the same as the lifting slip of the car 43, and thus the traction force of the elevator can be measured thereby.

In particular, the slip phenomenon is worsened when the rope pulley 30 is worn over a long period of time and the frictional force is reduced, so the frictional force between the rope 40 and the rope pulley 30 is measured at regular intervals so that the worn rope pulley ( 30) should be replaced.

At this time, the traction force detection device is installed on the rotating shaft 15, the rotation sensor 59 is integrally connected with the drive motor 10 to detect the stop time of the drive motor 10 and the rope pulley 30, The slip sensor 55 is installed at the circumference of the rope 40 to detect the initial slip speed of the rope 40 and the total slip distance of the rope 40 at the time of stopping the rope pulley 30.

In addition, the indicator 57 is connected to the rotation sensor 59 and the slip detection sensor 55, respectively, to detect that the driving motor 10 and the rope pulley 30 are stopped by the rotation detection sensor 59. When the slip detection sensor 55 is operated, the slip distance between the rope 40 and the rope pulley 30 is detected. In addition, the display unit 57 includes a memory unit 58, a memory switching circuit, a timer 55, and a microcomputer 56, respectively, to detect an initial slip speed at the time when a slip is generated, to store the memory, and to display it externally. And, by substituting this into the ⓛ equation it is possible to calculate the acceleration, by using this it is possible to calculate the traction (traction frictional force) by the following equation (3).

T = μ × (M _{counterweight} + M _car ) × g = (M _{counterweight} -M _car ) × g + (M _{counterweight} + M _car ) × a ,,,,,, ③

Where μ = kinetic friction coefficient between rope and rope pulley

Therefore, when such slip distance, speed, acceleration, etc. are detected, the traction force of the elevator can be calculated, and accordingly, the rope pulley 30 and the rope 40, which require a high cost, can be accurately predicted and systematically managed. It becomes possible.

On the other hand, when the slip detection sensor 55 or the rotation detection sensor 59 is installed as described above, and the brake 20 is arbitrarily opened, the car 43 and the balance weight 45 suspended on the rope 40 are provided. The car 43 and the counterweight 45 are lifted by the load difference. When the theoretical acceleration and the actual acceleration according to the equation ④ are compared, the frictional force of the entire elevator, in particular, the frictional force in the gearbox 35 is easily calculated. To predict the replacement time of the gearbox 35, it becomes possible to systematically manage.

(M ₁ -M ₂ ) g / (M ₁ + M ₂ ) = a _th

(M ₁ = mass of counterweight, M ₂ = mass of car)

η (efficiency) = a _actual / a _{th ,,,,,,,,,,, ④}

In addition, when the slip detection sensor 55 or the rotation detection sensor 59 is used, the stroke distance of the elevator can be easily detected, so that the stroke 40 of the rope 40 affecting the traction force of the elevator by substituting this into the equation ⑤. The weight can be calculated.

W _r = L ₁ × ω × N ,,,,,,,,, ⑤

(Where _r is the weight of the rope between the rope pulley and the car or counterweight,

L ₁ : distance between rope pulley and car or counterweight,

ω: unit weight of rope, N: head of rope)

As described above, according to the present invention, the braking force and the traction force detection device of the elevator is made of a relatively simple structure, but can accurately and conveniently obtain the above data, there is an advantage that can manage the elevator efficiently and safely.

Claims (2)

A drive motor 10, a brake 20 for stopping the drive motor 10, a rope pulley 30 rotated by the drive motor 10, and a rope caught by the rope pulley 30 ( In an elevator including a car 43 and a balance weight 45 connected to and lifted up and connected to 40, installed on a power line 25 of the brake 20 to detect whether power is supplied to the brake 20 or The brake sensing unit 50 installed in the brake 20 to detect the operation of the brake plunger of the brake 20 to detect an operation time of the brake 20 and the rotation shaft 15 connected to the driving motor 10. Rotation sensor 59 and the braking detection unit 50 to detect the slip distance from the brake detecting unit 50 to the stop of the elevator after the operating time of the brake 20 is detected from the braking detecting unit 50 And a rotation sensor 59, respectively, and a memory unit 58, a timer 55, and a microcomputer 56 are built in, respectively. Elevator braking force detection device comprising an indicator 57 for calculating, displaying and storing the braking distance or braking speed or braking acceleration by using the initial slip speed during braking and the slip distance until the elevator is stopped. . A drive motor 10, a brake 20 for stopping the drive motor 10, a rope pulley 30 rotated by the drive motor 10, and a rope caught by the rope pulley 30 ( In an elevator comprising a car 43 and a balance weight 45 connected to and lifted up and connected to 40, it is installed on a rotation shaft 15 connected to the drive motor 10 to determine whether the drive motor 10 is stopped during braking. Rotation sensor 59 for detecting and the rope pulley 30 is installed on the periphery of the rope 40 until the stop of the elevator after detecting that the drive motor 10 is stopped from the rotation sensor 59 And a slip detection sensor 55 for detecting a slip distance between the rope 40 and the rope 40, the rotation detection sensor 59 and the slip detection sensor 55, respectively, and the memory unit 58, the timer 55, The microcomputer 56 is built in to calculate the slip distance or slip speed or slip acceleration between the rope 40 and the rope pulley 30, respectively. Elevator traction detection device characterized in that it comprises a display (57) to display.