JPH06271238A - Braking force inspection device for elevator - Google Patents

Abstract

PURPOSE:To provide a braking force inspecting device for an elevator whereby braking force can be quickly accurately inspected. CONSTITUTION:A device comprises a speed detector 21 for detecting a speed of a car 5, RAM 25 for storing a speed data of the car 5 output by this speed detector 21 and a microcomputer 26 for calculating braking force of a brake machine 10 by obtaining deceleration at up/down operating time of the car 5 based on its speed data or the like stored in this RAM 25, so as to directly inspect the braking force of the brake machine 10 without adjusting its brake spring. In this way, the safety at the time of braking the car can be improved while efficiency of maintenance work of an elevator can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator braking force inspection device, and more particularly to an elevator braking force inspection device for inspecting the braking force when a car slows down due to the operation of a brake.

[0002]

2. Description of the Related Art FIG. 7 is a vertical sectional view showing the entire construction of an elevator, and FIG. 8 is an enlarged front view showing a portion of a brake provided in the elevator shown in FIG.

Generally, in an elevator, as shown in FIG. 7, a hoisting machine 2, a control board 3, a speed governor 4, etc. are provided in an upper machine room 1, and an elevator formed below the machine room 1 is provided. A car 5 and a counterweight 6 move up and down in the road 1a. The main rope 7 for suspending the car 5 and the counterweight 6 is wound around the sheave (not shown) of the hoisting machine 2, and the compensating rope 7a is suspended from the car 5 and the counterweight 6. Has been done. The speed-adjusting rope 8 whose both ends are connected to the car 5 is formed in a loop shape, and the loop-shaped upper portion is wound around the speed governor 4. The control panel 3 can be connected to the monitoring center 9 via a telephone line 9a.

The hoisting machine 2 described above is integrally provided with a braking device 10 for applying a braking force to the hoisting machine 2. As shown in FIG. 8, the brake 10 includes a rotary drum 11 that rotates integrally with a rotary shaft (not shown) of the hoisting machine 2.
And a pair of levers 12 provided on both sides of the rotary drum 11 and rotatable about one end thereof, and a pair of braking shoes 13 attached to the levers 12 and capable of contacting the rotary drum 11. And a braking spring 14 that applies an elastic force in the direction of closing the lever 12, and an electromagnetic device 15 that pushes and opens the lever 12 against the elastic force of the braking spring 14. The electromagnetic device 15 includes an electromagnetic coil 16 and an electromagnetic coil 16 that is excited by the electromagnetic coil 16 as shown in FIG.
And a pair of plunger levers 18 that rotate by the drive of the plunger 17 and press the other ends of the levers 12 outward.

In the braking device 10, the braking of the rotary drum 11 and the release of the braking state are alternately performed as follows. That is, since the elastic force is normally applied by the braking spring 14 in the direction of closing the lever 12, the braking shoe 13 comes into contact with the rotating drum 11 via each lever 12, and as a result, this rotating drum 11 is contacted.
Is braked. Then, when a current flows through the electromagnetic coil 16, an electromagnetic force is generated in the electromagnetic coil 16 portion and the plunger 17 is driven downward in FIG. 8, so that the plunger lever 18 rotates to move the lever 12 outward. By pressing, these levers 12 are opened. Along with this, the braking shoes 13 are separated from the rotary drum 11, respectively, so that the braking state of the rotary drum 11 is released. After that, when the current flowing through the electromagnetic coil 16 is cut off, the rotating drum 11 is braked again as described above.

Conventionally, when inspecting the braking force of the braking device 10, first, the braking spring 14 is loosened to adjust the set length, that is, the hoisting machine with the braking force of the braking device 10 being adjusted to be smaller than usual. 2 is measured, and the driving force when the hoisting machine 2 starts to slide is measured, and then the braking spring 14 is further loosened and the measurement is performed again. In this way, the braking spring 14 is adjusted to adjust the hoisting machine. The measurement of the driving force when 2 starts sliding is repeated several times to obtain a plurality of measurement data, and then
The braking force of the brake 10 in a normal use state is estimated based on the plurality of measured data.

[0007]

By the way, in the above-mentioned prior art, since a considerable braking force is applied to the hoisting machine 2 even when the braking spring 14 is loosened from the normal use state, this state is brought about. Therefore, there is a problem that a large driving force is required to drive the hoisting machine 2, that is, an excessive load is applied to the electric motor that drives the hoisting machine 2. In addition, since it is necessary to add a special circuit to the electric motor, there is a problem in that this work also requires labor.

Further, since the work of adjusting the braking spring 14 is required, the car 5 is stopped for a long time, which causes an inconvenience to the elevator user, and a work error occurs when the braking spring 14 is restored to the normal state. There were also concerns.
Further, since the braking force in the normal use state is estimated based on the measurement data obtained in the state where the braking spring 14 is loosened, it is difficult to accurately inspect this braking force.

The present invention has been made in view of the actual situation in the prior art, and an object thereof is to quickly and accurately control a brake without the work of adjusting a brake spring of the brake. An object is to provide an elevator braking force inspection device capable of inspecting power.

[0010]

To achieve this object, the present invention provides a hoisting machine around which a main rope for suspending a car and a counterweight is wound, and a braking force is applied to the hoisting machine. Equipped with an elevator including a brake to
In an elevator braking force inspection device for inspecting the braking force, a speed detector for detecting the speed of the car, a storage unit for storing the speed data of the car output by the speed detector, and a memory for storing the speed data. The deceleration of the car during the ascending operation and the deceleration of the car are calculated based on the speed data stored in the section, and the calculating section calculates the braking force of the brake.

[0011]

Since the present invention is constituted as described above, when the braking force is applied to the hoisting machine by the braking device to stop the rising car, the speed of the car output from the speed detector The data is stored in the storage unit, and similarly, when stopping the descending car, the speed data of the car output from the speed detector is stored in the storage unit and then stored in the storage unit. Based on the speed data of 1, the deceleration of the car during the ascending operation and the deceleration of the car is calculated by the calculating unit, and the braking force of the brake is calculated from the calculated deceleration. Accordingly, when the braking force of the brake is inspected, it is not necessary to adjust the braking spring of the brake, so that the inspection of the braking force can be performed quickly. Further, since the braking force in a normal use state is directly inspected, it is not necessary to estimate this braking force, and therefore the above-described braking force inspection can be performed accurately.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an elevator braking force inspection device of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an elevator braking force inspection device of the present invention,
2 is a flowchart showing a part of the processing procedure of the braking force inspection device of FIG. 1, FIG. 3 is a flowchart showing another part of the processing procedure of the braking force inspection device of FIG. 1, and FIG. FIG. 5 is a timing chart showing the correlation between the speed and the acceleration and deceleration when the car is driven up, and FIG. 5 shows the correlation between the speed and the acceleration and deceleration when the car of the elevator shown in FIG. 1 is driven down. FIG. 6 is a timing chart, and FIG. 6 is a diagram showing equations used in a calculation unit provided in the braking force inspection device of FIG. In FIG. 1, the same parts as those in FIGS. 7 and 8 described above are designated by the same reference numerals. Further, the work procedures S1 to S shown in FIGS.
13 is connected by parts, that is, the work procedure S10 in FIG. 2 is continued to the work procedure S11 in FIG.

In the elevator shown in FIG. 1, the elevator shown in FIG.
As shown in (b) and (b), the car 5 is started and stopped at the time of ascending operation. That is, first, when the start command is output from the control panel 3 at the start time T ₁ ,
When the braking state of the brake 10 is released, the hoist 2
As shown in FIG. 4 (b), the acceleration of the car 5 increases and the vehicle enters a steady state at a predetermined acceleration A ₁ , and the acceleration state ends at the acceleration end time T ₂ . Along with this, the speed of the car 5 increases at a constant rate as shown in FIG. 4A, and then the speed of the car 5 becomes the steady speed V ₁ from the acceleration end time T ₂ . Next, when the car 5 is forcibly stopped in response to the stop command output from the control panel ₃ at the deceleration start time T ₃ , the deceleration increases as shown in FIG. The steady state is reached at B ₁ , and the deceleration state ends at the stop time T ₄ . Along with this, the speed of the car 5 decreases at a constant rate from the deceleration start time T ₃ and stops at the stop time T ₄ .

On the other hand, when the car 5 is started and stopped during the descent operation, first, when the start command is output from the control panel 3 at the start time T ₅ , the braking state of the brake 10 is released and the winding operation is performed. Since the upper unit 2 is started, (b) of FIG.
As shown in (3), the acceleration of the car 5 becomes large and becomes a steady state at a predetermined acceleration A ₂ , and the acceleration state ends at the acceleration end time T ₆ . Along with this, the speed of the car 5 increases at a constant rate as shown in FIG. 5A, and then the speed of the car 5 becomes the steady speed V ₂ from the acceleration end time T ₆ . Next, when the car 5 is forcibly stopped in response to the stop command output from the control panel 3 at the deceleration start time T ₇ , the deceleration increases as shown in FIG. The steady state is reached at B ₂ , and the deceleration state ends at the stop time T ₈ . Along with this, the speed of the car 5 decreases at a constant rate from the deceleration start time T ₇ and stops at the stop time T ₈ .

As shown in FIG. 1, the braking force inspection device of the present embodiment is provided in the hoisting machine 2 and has a speed detector 21 for detecting the speed of the car 5, and an output from this speed detector 21. Data processing device 22 for processing speed data of the car 5
It consists of The data processing device 22 includes an interface circuit 23 connected to the speed detector 21.
And the control program of the data processor 22, the weight of the car 5, the weight of the counterweight 6, the weight of the main rope 7, the weight of the compensating rope 7a, the inertia ratio of the hoisting machine 2, the sheave of the hoisting machine 2. A ROM 24 for preliminarily storing various constants of the elevator mechanism system such as a diameter, a storage unit for storing speed data of the car 5 input via the interface circuit 23, for example, a RAM 25, and a storage unit stored in the RAM 25. A calculation unit that calculates the deceleration of the car 5 and the braking force of the brake 10 based on the speed data of the car 5, for example, a microcomputer 26, and a display unit 27 that displays the processing result output from the microcomputer 26.
It consists of The data processing device 22 is connected to a control panel 3 provided in the machine room 1, and the microcomputer 2 is responsive to a command output from the control panel 3.
The control of 6 automatically calculates the braking force of the brake 10. The microcomputer 26 calculates the braking force of the brake on the basis of the speed data of the car 5 and the unbalanced mass and the equivalent inertial coefficient of the hoisting shaft obtained from various constants of the elevator mechanism system. Means and the calculation result obtained by the calculation of the calculating means are compared with a predetermined reference value, and the brake 10
And a determination circuit for determining whether the braking force of the monitoring circuit 9 is good or not. The interface circuit 23 determines the determination result output from the determination circuit via the control panel 3 and the telephone line 9a. And a transmission section for transmitting to.

In this embodiment, the braking force of the brake 10 is checked according to the processing steps S1 to S13 shown in FIGS. That is, first, as step S1, the unbalanced torque is calculated by the microcomputer 26 based on the various constants of the elevator mechanism system stored in the ROM 24 according to the equation (1) in FIG.
In this equation (1), Tub is an unbalanced torque, Ds is a sheave diameter of the hoisting machine 2, Mc is a car side mass, and Mcw is a counterweight side mass.

Next, in step S2, the maintenance operation is displayed and announced in the car 5, and in step S3 it is confirmed whether or not there are passengers in the car 5. If there are passengers in the car 5, While the start of step S4 is suspended, the maintenance operation is displayed and announced in the car 5 again, and the passengers are urged to exit from the car 5.

On the other hand, when there is no passenger in the car 5, as step S4, the ascending operation of the car 5 is started at the starting time T ₁ in FIG. Along with this, the car 5 is accelerated by the acceleration A ₁ as shown in FIG.
As shown in, the speed of the car 5 reaches the steady speed V ₁ at the acceleration end time T ₂ . In step S5, the speed of the car 5 is detected by the speed detector 21 and the speed data is stored in the RAM 25.
In step S6, the brake 10 is operated at the deceleration start time T ₃ in FIG. 4 to forcibly stop the car 5. At this time, the car 5 is decelerated at the acceleration (-B ₁ ), that is, the deceleration B ₁ , and the car 5 is stopped at the stop time T ₄ in FIG.
Stops. Then, in step S7, the deceleration B ₁ of the car 5 is calculated by the microcomputer 26 based on the velocity data stored in the RAM 25 according to the equation (2) in FIG. 6, and the deceleration B ₁ is stored in the RAM 25. To do. In this equation (2), dωU / dt is the hoisting machine axial angular velocity (that is, deceleration B ₁ ) when the car 5 is rising, and Tb is the brake 1
The braking force is 0, Tub is the unbalanced torque, and J is the equivalent inertial performance rate of the hoisting machine shaft.

In this way, after stopping the ascending operation of the car 5 in step S8, the descending operation of the car 5 is started at the starting time T ₅ in FIG. 5 as a step S9. Along with this, the car 5 is accelerated by the acceleration A ₂ as shown in FIG. 5B, and then the acceleration end time T as shown in FIG.
_{At 6} the speed of the car 5 reaches the steady speed V ₂ . Similar to the procedure S5~ steps S6 in the stores velocity data in RAM25 by detecting the speed of the car 5 th power by the speed detector 21 activates the brake 10 in the deceleration starting time T ₇ of FIG. 5 Car 5 is forcibly stopped. In this case, the passenger cage 5 is decelerated by the acceleration (-B ₂₎ That deceleration B _2,
The car 5 stops at the stop time T ₈ in FIG. Then, similarly to step S7, the deceleration B ₂ of the car 5 is calculated by the microcomputer 26 based on the velocity data stored in the RAM 25 according to the equation (3) of FIG. 6, and this deceleration B ₂ is calculated. It is stored in the RAM 25. In this equation (3), d
ωD / dt is the hoisting machine angular velocity (that is, deceleration B ₂ ) when the car 5 is descending, Tb is the braking force of the brake 10, Tub is the unbalanced torque, and J is the equivalent inertial performance rate of the hoisting machine shaft. ing.

Next, after stopping the descending operation of the car 5 in step S10, RA is executed in step S11 shown in FIG.
Hoisting machine angular velocity d when the car 5 is lifted, stored in M25
Based on ωU / dt (that is, deceleration B ₁ ) and hoisting machine shaft angular velocity dωD / dt (that is, deceleration B ₂ ) at the time of descending, the microcomputer 26 operates the brake 10 according to the formula (6) of FIG. The braking force Tb is calculated. It should be noted that the equations (4) and (5) of FIG. 6 are obtained from the equations (2) and (3) of FIG. 6, respectively. Equation (6) is obtained.

Next, in step S12, the microcomputer 26 stores the calculation result obtained in step S11 in the ROM 24.
It is determined whether the braking force of the brake 10 is good by comparing with the reference value stored in step S13, the determination result is displayed on the display unit 27 in step S13, and the processing result is displayed on the control panel 3 by the interface circuit 23. It is transmitted to the monitoring center 9 via the telephone line 9a.

In the embodiment thus constructed, the brake 1
Since it is not necessary to adjust the 0 brake spring, the brake 1
The braking force of 0 can be checked quickly and the elevator user is annoyed when the car 5 is stopped.
It is possible to prevent a work error when the braking spring 14 is restored to the normal state.

Further, without inferring the braking force in the normal use state based on the measurement data in the state where the braking spring 14 is loosened, that is, the braking force in the normal use state is directly inspected. Therefore, the braking force of the brake 10 can be accurately checked. At this time, since it is not necessary to drive the hoisting machine 2 while the brake 10 is operating, it is not necessary to overload the electric motor that drives the hoisting machine 2.

Further, since the determination result for determining whether the braking force of the brake 10 is good is transmitted from the interface circuit 23 to the monitoring center 9, the monitoring center 9 can monitor the braking force of the brake 10. And therefore
The safety of the elevator can be improved.

Although the speed detector 21 is provided on the hoisting machine 2 in this embodiment, the speed governor 4 is used instead of the hoisting machine 2.
Alternatively, the deflector wheel 4a may be provided with the speed detector 21. Further, although the data processing device 22 is provided outside the control panel 3 in this embodiment, the data processing device 22 may be provided inside the control panel 3.

[0026]

Since the present invention is configured as described above, it is possible to quickly check the braking force of the brake without the work of adjusting the braking spring of the brake, and therefore the efficiency of the elevator maintenance work. It is possible to improve and prevent annoyance to elevator users. Further, since the braking force of the brake can be accurately inspected, it is possible to reliably grasp the operating state of the brake and enhance the safety of the car. Furthermore, when checking the above-mentioned braking force, it is not necessary to apply an excessive load to the electric motor that drives the hoisting machine, so that it is possible to avoid failure of the electric motor and shortening of its life.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an elevator braking force inspection device of the present invention.

FIG. 2 is a flowchart showing a part of a processing procedure of the braking force inspection device of FIG.

FIG. 3 is a flowchart showing another part of the processing procedure of the braking force inspection device of FIG.

FIG. 4 is a timing chart showing a correlation between speed, acceleration, and deceleration when the elevator car of FIG. 1 is driven up.

5 is a timing chart showing a correlation between speed, acceleration, and deceleration when the elevator car of FIG. 1 is driven down.

FIG. 6 is a diagram showing an equation used in a calculation unit provided in the braking force inspection device of FIG. 1.

FIG. 7 is a vertical cross-sectional view showing the overall configuration of a general elevator.

8 is an enlarged front view showing a part of a brake provided in the elevator of FIG. 7. FIG.

[Explanation of symbols]

 2 Hoisting machine 3 Control panel 5 Car basket 6 Balancing weight 7 Main rope 9 Monitoring center 10 Brake 21 Speed detector 22 Data processing device 23 Interface circuit (transmission part) 24 ROM 25 RAM (storage part) 26 Microcomputer (calculation) Section, determination circuit) 27 Display section

Claims (1)

[Claims] 1. An elevator including a hoisting machine around which a main rope for suspending a car and a counterweight is wound, and a braker for applying a braking force to the hoisting machine. In the elevator braking force inspection device to be inspected, a speed detector for detecting the speed of the car,
A storage unit for storing the speed data of the car output by the speed detector, and a deceleration for each of the ascending operation and the descending operation of the car based on the speed data stored in the storage unit. A braking force check device for an elevator, comprising: a calculation unit that calculates and calculates a braking force of the brake.