JP2013049568A - Brake holding torque adjusting device for hoisting machine and brake holding torque adjusting method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically and simply execute a brake torque rising operation without a maintenance person.SOLUTION: In a brake holding torque adjusting device for a hoisting machine, wherein an elevator control panel 2 adjusts a brake holding torque by receiving a brake holding torque adjustment instruction signal from a monitoring center when brake holding force of a brake device of the hoisting machine is reduced, the elevator control panel 2 includes: a means 2b for storing a desired brake holding torque threshold 2b1; a car initial position setting means 2A for moving/stopping the car at a predetermined position at the lowest floor; an inspection mode switching means 2B for switching to the inspection mode after the car stops at the predetermined position; and a brake breaking-in processing means 2C for determining whether a torque value to the hoisting machine exceeds the brake holding torque threshold by performing brake holding force rising operation by the brake breaking-in.

Description

  Embodiments described herein relate generally to a brake holding torque adjusting device and a brake holding torque adjusting method for a hoisting machine.

  The elevator is provided with a brake device to automatically stop rotation due to the inertia of the motor of the hoisting machine.

  As this brake device, for example, a structure including a brake pad that contacts a brake wheel fixed to an output shaft of a motor and gives resistance due to friction is known, and in recent years, a disc brake is used. Brake device is used.

  The brake torque generated from these brake devices is sufficient to stop the elevator car and at the same time needs to be adjusted within a certain appropriate range so as not to cause a shock due to a sudden stop.

  Therefore, conventionally, maintenance personnel move the elevator at each periodic inspection and watch the brake movement in the machine room, or stop the elevator automatically, and the brake slip amount from the level difference between the floor sill and the car sill Is being measured.

  However, it is difficult to check the operating state of the brakes unless the maintenance staff visits the site for each periodic inspection to check the brakes.

  Therefore, in recent years, an elevator monitoring center, a maintenance center, or the like transmits data related to a brake diagnosis processing procedure to an elevator installed at each location in a remote place in accordance with a brake diagnosis operation program. The control panel on the elevator side receives the data relating to the brake diagnosis processing procedure, confirms the load in the car, stops within the released state and is within a predetermined value (for example, 0 to 50%) in the UP direction, or for example, 50% Abnormality / normality is determined according to whether the above-mentioned torque application or any of these torque applications causes the car to move a predetermined distance, and is performed again several times at predetermined time intervals, and finally the normality / abnormality of the brake is diagnosed.

Japanese Patent Application Laid-Open No. 08-108983

  However, if it is diagnosed that the brake holding torque has decreased from the results of the brake diagnosis operation as described above, maintenance personnel will go to the site, check for any abnormality in the elevator equipment, and determine that there is no abnormality in the equipment. When this is done, so-called brake slip is performed in which the power supply to the rake device of the hoisting machine is cut off to perform a braking operation, and the holding torque of the brake is increased.

  The reason for this is that a decrease in holding torque of the brake device is considered to be caused by the influence of temperature, humidity, etc., and the holding torque is often improved by brake slip or the like.

  However, the holding torque increase work as described above needs to be adjusted to the brake by brake slip. For this purpose, maintenance personnel go from the monitoring center etc. to the remote elevator installation site, or there is no customer presence. In some cases, it is necessary to visit the site again, and there is a problem that requires labor and time to improve the holding torque of the brake.

  Therefore, the brake holding torque adjusting device and the brake holding torque adjusting method for the hoisting machine perform an adjusting operation for raising the holding torque of the brake automatically and by a simple processing procedure, thereby reducing the labor of maintenance personnel. And to ensure safety.

  In order to solve the above-described problem, according to an embodiment of the present invention, when the brake holding force of a brake device of a hoisting machine that raises and lowers a car is reduced, an elevator device receives a brake holding torque adjustment instruction signal from an external device. In the hoisting machine brake holding torque adjusting device in which the control board adjusts the brake holding torque, the elevator control board has means for storing a desired brake holding torque threshold value, and no passenger is in the car. Car initial position setting means for moving / stopping the car to a predetermined position on the lowermost floor, and after the car stops at a predetermined position, “automatic maintenance operation in progress” is displayed on the hall display section and inspected. Check mode switching means for switching to the mode, supplying predetermined power for causing the hoist to run at a low speed, and setting the release state without applying a voltage to the brake device And a brake holding torque adjusting device for a hoisting machine, comprising brake balancing processing means for performing a brake holding force increasing operation and determining whether a torque value to the hoisting machine exceeds the brake holding torque threshold value. .

The block diagram explaining the brake holding torque value adjustment apparatus of the winding machine which concerns on embodiment. The figure which represents the upper surface of a winding machine roughly. The block diagram explaining the principal part of the brake holding torque value adjustment apparatus of the winding machine which concerns on embodiment. The figure explaining a series of processing procedures explaining the operation | movement of the brake holding torque value adjustment apparatus of the winding machine which concerns on embodiment, and a brake holding torque value adjustment method.

Hereinafter, embodiments will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram illustrating a brake holding torque adjusting device for a hoist according to an embodiment.

  The brake holding torque adjusting device for the hoisting machine is provided in accordance with the hoisting machine 1 installed in the machine room at the upper part of the hoistway or the top of the hoistway and the speed command corresponding to the call registration floor based on the hall call or the car call. And an elevator control panel 2 having storage units 2a and 2b for controlling the rotational speed of the upper machine 1.

  A monitoring center 4 is connected to the elevator control panel 2 via a communication network 3 such as a LAN or WAN.

  The monitoring center 4 uses a conventionally known brake diagnostic operation program to check the brake holding torque of the hoist 1 and sends a brake holding torque adjustment command signal to the elevator control panel 2 when the brake holding torque decreases. It has a function to transmit. Note that the monitoring center 4 is not particularly limited to a name, and includes, for example, a maintenance center and a central center.

  A main rope 12 is wound around a hoisting sheave 11 of the hoisting machine 1. One end side of the main rope 12 passes through a car sheave (pulley) 14 at the top of the car 13, and the end of the rope is supported by a car side elastic body 16 such as a car side hitch spring attached to the machine room floor 15. Is done. Further, the other end side of the main rope 12 passes through a counter sheave (pulley) 18 above the counter 17, and the end of the rope is supported by an elastic body 19 such as a counter-side hitch spring attached to the machine room floor 15. Is done.

  On the other hand, a brake device 21 and a speed detector 22 are provided on the rotating shaft side of the hoisting machine 1 opposite to the hoisting sheave 11, for example.

  FIG. 2 is a view schematically showing the appearance of the hoisting machine 1 when viewed from the upper surface side. The speed detector cover 22a on the right side of the hoisting machine 1 is shown in the speed detector cover 22a. A speed detector 22 is provided for detecting.

  The brake device 21 has a function of stopping the car 13 at a fixed position on each floor by performing a braking operation by contacting the rotating shaft system of the hoist 1 under a stop command from the elevator control panel 2.

  The speed detector 22 detects the actual rotation speed of the hoist 1 and sends it to the elevator control panel 2.

  As shown in FIG. 3, the elevator control panel 2 is installed at each location of the elevator and a program data storage unit 2a such as a ROM for storing at least operation program data 2a1 and holding torque adjustment program data 2a2. A data storage unit 2b such as a RAM for storing at least the brake holding torque threshold value 2b1 and the automatic maintenance operation data 2b2 for displaying each floor, in addition to various data sent from various sensors and data related to operation control. Is provided.

  The program data storage unit 2a may store conventionally known brake diagnostic operation program data instead of the monitoring center 4.

  The elevator control panel 2 compares the actual rotation speed from the speed detector 22 with the reference speed corresponding to the call registration floor based on the hall call or the car call, and the operation control signal that matches the reference rotation speed. 3 and various functions shown in FIG. 3 are provided in addition to the function of controlling the hoisting machine 1 through the hoisting machine side signal wiring 23.

  That is, the elevator control panel 2 includes a car initial position setting unit 2A, an inspection mode switching unit 2B, a brake alignment processing unit 2C, and a brake holding force confirmation unit 2D.

  The car initial position setting means 2A has a function of moving and stopping a no-load car 13 on which no passenger is riding to a predetermined position on the lowest floor.

  Prior to raising the inspection mode switching means 2B and the brake holding torque, the passenger is informed that the maintenance operation is in progress, and a process of setting the inspection operation mode is performed.

  The brake matching processing means 2C performs a so-called brake slip that performs a braking operation by cutting off the power supply to the brake device 21 to the hoisting machine 1 while performing the ascending operation of the car 13 at a low speed. It has a function of increasing the holding torque of the brake by performing the braking of the brake.

  The brake holding force confirmation unit 2D has a function of performing a conventionally known brake diagnostic operation and confirming the brake holding force.

  Further, a tail cord 24 for exchanging various signals including electric power is connected between the elevator control panel 2 and the car 13.

  First, after describing the general operation of the elevator system, the brake holding torque adjustment processing by the elevator control panel 2 will be described.

(A) About general control operation of an elevator.

  When the user gets into the car 13 and operates the destination floor button, the car is registered to the elevator control panel 2 through the tail code 24, and the car call is registered in response to the operation of the destination floor button.

  The elevator control panel 2 is a torque corresponding to a speed control signal in which a deviation between a predetermined speed reference (speed pattern) corresponding to the destination floor registered for the car call and the actual speed signal detected by the speed detector 22 is zero. A command is sent out and supplied to the hoisting machine 1.

  Here, as the hoisting machine 1 is driven to rotate, the main sheave 11 rotates, the main rope 12 wound around the main sheave 11 is sent out in a desired direction, and the car 13 moves up or down. Run. At this time, vibration during traveling is absorbed by the car-side hitch spring 16 and the counter-side hitch spring 19, and after landing on the destination floor (target floor), it is received by a brake operation command from the elevator control panel 2. Then, the brake device 21 applies a braking operation by a contact such as pressing against the rotating shaft system of the hoist 1 to stop the car 13 at a fixed position on the destination floor.

  Therefore, the monitoring center 4 performs a brake diagnosis operation of an elevator installed at each location in a remote place using a conventionally used brake diagnosis operation program, and measures the brake holding torque. Here, when the brake holding force of the brake device 21 is reduced, a position shift (step) occurs between each floor of the car 13 when the car 13 is stopped, and the passenger 13 gets involved in an unexpected trouble when the passenger gets on and off. Can be considered.

  Therefore, adjustment to increase the brake holding force of the brake device 21 is necessary. In the present embodiment, when the elevator control panel 2 receives a brake holding torque adjustment instruction from the monitoring center 4, an adjustment operation for increasing the brake holding force is performed according to a predetermined holding torque adjustment program.

(B) About the adjustment process of the brake holding force by this elevator control panel 2 (refer FIG. 4).

  The monitoring center 4 accesses the elevator control panel 2 at an appropriate time zone, performs a brake diagnosis operation of the brake device 21 for the hoist 1 using a conventionally used brake diagnosis operation program, and controls the elevator. Data for checking the brake holding force is acquired from the panel 2, and it is determined whether or not the brake holding force is reduced. Here, when the monitoring center 4 determines that the brake holding force is reduced, the monitoring center 4 transmits a brake holding torque adjustment instruction signal to the corresponding elevator control panel 2 at an appropriate time.

(1) Upon receiving the brake holding torque adjustment instruction signal, the elevator control panel 2 reads the holding torque adjustment program data 2a2 from the program data storage unit 2a and writes it into the data storage unit 2b as a work memory, as shown in FIG. A series of brake holding torque adjustment processing is executed.

  That is, when the elevator control panel 2 receives the brake holding torque adjustment instruction signal (S1), the elevator control panel 2 executes the car initial position setting means 2A.

  The car initial position setting means 2A takes out a car load signal from a load meter (not shown) installed in the car 13 (S2), and determines whether or not a passenger is in the car 13 (S3). ). If there are passengers in the car 13, the process returns to step S2 and the same process is repeated.

  The car initial position setting means 2A moves the car 13 to the lowest floor when it is determined in step S3 that the inside of the car 13 is NL (no load) without passengers (S4). After the car 13 has moved to the lowest floor, it is determined whether or not it has stopped at a fixed position (initial position) on the lowest floor (S5). When it is determined that the fixed position has stopped, the inspection mode switching means 2B is executed. . These steps S1 to S5 correspond to a car initial position setting step.

  The inspection mode switching means 2B reads the automatic maintenance operation data 2b2 for displaying each floor from the data storage unit 2b after stopping at a fixed position on the lowest floor, and displays “automatic maintenance operation in progress” on each floor or a reference floor display (not shown). "Is displayed (S6), and the passenger is informed that maintenance is being performed.

  The inspection mode switching means 2B displays “automatic maintenance operation in progress” and automatically switches to the inspection mode (low speed operation mode) (S7). These steps S6 and S7 correspond to an inspection mode switching step.

  Subsequently, the elevator control panel 2 executes a brake matching process (brake holding force increasing operation) means 2C. After setting i = 1 in the counter memory (not shown) (S8), the brake matching processing means 2C winds up the electric power for the low-speed climbing operation with the loaded load of the car 13 set to NL (no load). The car 13 is supplied to the hoisting machine 1 through the machine-side signal wiring 23, and the car 13 is driven at a low speed, and the brake device 21 is set in a released state without applying a voltage (S9). That is, the brake holding torque is increased by cutting off the power supply to the brake device 21 of the hoisting machine and performing a braking operation, so-called brake slip, and adjusting the brakes. This braking process is limited to 10 seconds at maximum.

  At this time, the brake balancing processing means 2C compares the current value flowing to the hoisting machine 1, that is, the torque value with the brake holding torque threshold value 2b1 to be obtained in advance stored in the data storage unit 2b, When the torque value does not exceed the brake holding torque threshold value 2b1, the low speed ascending operation / brake release state is repeated a predetermined number of times (for example, up to 3 times) (S9 to S12). When the torque value exceeds the brake holding torque threshold value 2b1 in the repetition of steps S9 to S12, the low-speed raising operation of the car 13 is terminated. These steps S8 to S12 correspond to brake matching processing steps.

  Note that if the brake holding torque threshold is not exceeded in the first low-speed climbing operation, the second low-speed climbing operation is performed, but some time is opened between the first and second rounds.

  Further, the elevator control panel 2 executes the brake holding force confirmation means 2D. The brake holding force confirming means 2D performs the conventionally used brake diagnosis operation while moving the car 13 to the top floor after completing the low-speed climbing operation of the car 13 (S13).

  If the brake holding torque increases and exceeds the required brake holding torque threshold value 2b1 (S14), the normal operation is resumed.

  On the other hand, when the torque value (current value) is equal to or less than the brake holding torque threshold value 2b1 in step S11 despite the holding torque increasing operation by a predetermined number of times, and in step S14, the brake holding torque is the brake holding torque threshold. If the value is 2b1 or less, an error signal that disables torque increase is issued to the monitoring center 4 (S15).

  The number of repetitions due to the holding torque increasing operation, the operation date and time, etc. can be confirmed by maintenance personnel from the data storage unit 2b at a later date, and the number of repetitions can be changed.

  Therefore, according to the present embodiment, the monitoring center 4 accesses the elevator control panel 2 at an appropriate time, performs the brake diagnosis operation of the hoist 1 using a conventionally known brake diagnosis operation program, When it is determined that the brake holding force of the brake device 21 is reduced, a brake holding torque adjustment instruction signal is transmitted to the corresponding elevator control panel 2.

  When the elevator control panel 2 receives the brake holding torque adjustment instruction signal, the elevator control panel 2 stops the car 13 at a predetermined position based on the holding torque adjustment program data 2a2 stored in advance, and then displays “in automatic maintenance operation”. At the same time, the mode is switched to the inspection mode (low speed operation mode), and the brake holding force is increased under the low speed increasing operation to determine whether the torque value exceeds the brake holding torque threshold value 2b1. Since the torque adjustment process ends when the torque exceeds the limit, it is possible to improve the decrease in the torque holding force automatically and by increasing the brake holding force according to a simple processing procedure. Work burden is eliminated and safety can be secured at the same time.

(Other embodiments)
(1) The said embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Hoisting machine, 2 ... Elevator control panel, 2a ... Program data storage part, 2b ... Data storage part, such as RAM, 2A ... Car initial position setting means, 2B ... Inspection mode switching means, 2C ... Brake adjustment processing means, 2D: Brake holding force confirmation means, 3 ... Communication network, 4 ... Monitoring center, 11 ... Hoisting sheave, 12 ... Main rope, 13 ... Ride car, 17 ... Counter, 21 ... Brake device, 22 ... Speed detector.

Claims (6)

When the brake holding force of the brake device of the hoisting machine that raises and lowers the car decreases, the elevator control panel adjusts the brake holding torque in response to a brake holding torque adjustment instruction signal from the monitoring center. In the torque adjustment device,
The elevator control panel is
Means for storing a desired brake holding torque threshold;
Car initial position setting means for moving and stopping the car to a predetermined position on the lowest floor when no passengers are in the car;
Inspection mode switching means for displaying "automatic maintenance operation" on the hall display unit and switching to the inspection mode after the car stops at a predetermined position;
The hoisting machine is supplied with a predetermined electric power for causing the hoisting machine to run at a low speed, and is set in a released state without applying a voltage to the brake device, and the hoisting machine is operated to increase the brake holding force by combining the brakes. A brake holding torque adjusting device for a hoisting machine, comprising: brake balancing processing means for determining whether or not the torque value to the torque exceeds the brake holding torque threshold value. In the hoisting machine brake holding torque adjusting device according to claim 1,
When the torque value exceeds the brake holding torque threshold value by the brake balancing processing means, the brake balancing processing is terminated, the diagnostic operation of the brake device for the hoisting machine is performed, and the torque value is the brake holding torque. A brake holding force confirmation means for transmitting an error signal indicating that the torque cannot be increased to an external device when the torque value is less than the threshold value and returning to normal operation when the torque value exceeds the brake holding torque threshold value; A brake holding torque adjusting device for a hoisting machine.   The monitoring center is provided at a remote location away from the installation location of the hoisting machine, performs a brake diagnosis operation of the brake device for the hoisting machine, and determines that the brake holding force is reduced. The brake holding torque adjustment device for a hoist according to claim 1 or 2, wherein a holding torque adjustment instruction signal is transmitted to the elevator control panel.   The car initial position setting means determines that no passenger is in the car from a car load signal detected by a load meter installed in the car. Item 3. A brake holding torque adjusting device for a hoisting machine according to item 2.   The brake balancing processing means performs a brake balancing process for a predetermined number of times until a torque value to the hoisting machine exceeds the brake holding torque threshold value, and increases the brake holding torque of the brake device. The brake holding torque adjusting device for a hoist according to claim 1 or 2. In the brake holding torque adjustment method of the hoisting machine, when the brake holding force of the brake device of the hoisting machine is reduced, the elevator control panel adjusts the brake holding torque based on a brake holding torque threshold determined in advance.
A car initial position setting step of moving the car to the lowest floor and stopping it at a predetermined position when it is determined from the output of the load detection means installed in the car that no passenger is in the car; and ,
After stopping the car at a predetermined position, an inspection mode switching step for displaying `` automatic maintenance operation '' on each floor platform display unit and switching to the inspection mode,
The hoisting machine is supplied with a predetermined electric power for causing the hoisting machine to run at a low speed, and is set in a released state without applying a voltage to the brake device, and the hoisting machine is operated to increase the brake holding force by combining the brakes. A brake balancing process step for determining whether the torque value to the torque exceeds the brake holding torque threshold;
When the torque value exceeds the brake holding torque threshold value, the brake balancing process is terminated, the brake diagnosis operation is performed, and the torque increases when the torque value falls below the brake holding torque threshold value. A brake holding torque adjustment method for a hoisting machine, comprising: a brake holding force confirmation step for outputting an error signal indicating that the operation is disabled.

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