JPH11199153A - Elevator diagnostic equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an elevator diagnostic apparatus capable of grasping the necessity of inspection before an abnormality occurs. A motor-side movement amount measuring device that calculates a moving distance of a car based on a rotation speed of a motor or a sheave, and a movement amount of the car based on a rotation speed of a governor pulley. A car-side movement amount measuring device 10 is provided, and when a stop command is issued while the car 2 is traveling,
The movement amount until the stop is measured by the motor-side movement amount measurement device 6 and the car-side movement amount measurement device 10, and the difference between them and the comparison with a predetermined judgment value are used to determine whether the rope slips, sheaves idle due to the cage lock, brake control. A judging device 12 is provided for judging a sign of abnormality of power drop, rope slip and brake braking force drop, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diagnostic apparatus for an elevator, and more particularly to an elevator for judging a predictive phenomenon of an abnormality such as rope slip, sheave idling due to car lock, brake braking force decrease, brake braking force decrease due to rope slip, and the like. A diagnostic device.

[0002]

2. Description of the Related Art As is well known, an elevator has a car connected to one end of a main rope suspended in a sword shape on a sheave, and a counterweight connected to the other end thereof. The car is raised and lowered by the frictional force of the main rope. In addition, a brake is used to stop the car at the destination floor, and the brake uses frictional force when the sheave is sandwiched. Thus, the brakes require high security to keep the car stationary at the destination floor, and the main ropes support the car and the counterweight and transmit the power of the motor. Plays a role. Therefore, it is very important to check the brake braking force and the deterioration of the main rope to keep the elevator running safely, and to maintain the frictional force between the brake and sheave or between the main rope and sheave. Therefore, it is necessary to prevent the main rope from being broken. Therefore, in the past, maintenance personnel regularly checked the brake braking force and the state of deterioration of the main rope.

[0003]

However, according to the conventional method of checking the brake braking force and the deterioration state of the main rope by the maintenance personnel, the braking force measuring device is used to judge whether the brake braking force is low or the main rope is deteriorated. And the entire main rope had to be inspected visually, which required a great deal of labor and time.

[0004] It is an object of the present invention to provide an elevator diagnostic apparatus capable of grasping the necessity of inspection from a predictive phenomenon before an abnormality occurs.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a car which moves up and down through a main rope by rotation of a sheave driven by a motor, and a brake which stops the car. An elevator diagnostic device configured to diagnose an abnormality of an elevator, comprising: a motor-side moving amount measuring device that measures the motor-side moving amount after detecting the elevator stop command; and a motor-side moving amount measuring device that detects the elevator stop command. A car side movement amount measuring device for measuring the above car side movement amount, a rope slip from a movement amount of both these movement amount measuring devices and a predetermined judgment value, a sheave idling by car lock, a decrease in brake braking force, a rope It is characterized in that a judgment device for judging a sign of abnormality of slip and a decrease in brake braking force is provided.

As described above, the elevator diagnostic apparatus of the present invention measures the amount of movement after the stop command is detected by the motor-side moving amount measuring device and the car-side moving amount measuring device, and the determination device determines both of these moving amounts and From the preset judgment value,
Rope slip, sheave slippage due to car lock, brake braking force drop, rope slip and brake braking force drop are determined.Before the elevator malfunction, we find signs of these abnormalities, and The necessity of inspection can be grasped.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing an elevator diagnostic apparatus according to an embodiment of the present invention. A main rope 5 is hung on a sheave 3 which is rotated by the drive of the motor 1 in a hanging shape, and a balancing weight 4 and a car 2 are connected to both ends of the main rope 5 respectively. Also,
Both ends of a governor rope 8 wound around a governor pulley 7 at upper and lower ends are connected to the car 2, and the governor rope 8 is configured to rotate in synchronization with the elevation of the car 2. The governor 9 is a safety device that detects the overspeed of the car 2 from the moving speed of the governor rope 8 and stops the car 2 when detecting the overspeed. Further, the motor-side movement amount measuring device 6 is constituted by a motor-side encoder for obtaining the traveling distance and the position of the car 2 based on the number of rotations of the motor 1 or the sheave 3.
A car-side encoder for measuring the position of the car 2 based on the number of rotations of the car constitutes a car-side movement amount measuring device 10, and the output signals of the motor-side movement amount measuring device 6 and the car-side movement amount measuring device 10 A determination device 12 is provided for inputting a certain number of pulses together with a signal from a control device 11 for controlling an elevator operation such as driving and stopping an elevator.

When a stop command is output from the control device 11 while the car 2 is traveling, the determination device 12 determines the motor-side movement amount measurement device 6 from when the stop command is output to when it stops.
The microcomputer is configured by a microcomputer that determines rope slip, sheave idling due to car lock, brake braking force decrease, rope slip and brake braking force decrease based on the number of pulses of the car-side movement amount measuring device 10, and the motor-side movement. An input unit 12a for receiving the count value of the number of pulses detected by the quantity measuring device 6 and the car-side moving amount measuring device 10, and a pre-measurement during normal operation of the elevator, rope slippage, sheave slippage due to car lock, and a decrease in brake braking force. A storage unit 12b for storing a determination value serving as a reference for determining whether the condition corresponds to any of the rope slip and the decrease in brake braking force;
Motor-side movement amount measuring device 6 captured from input unit 12a
The calculation is performed based on the count value of the car-side movement amount measuring device 10, and the result is compared with the determination value to determine whether the rope slip, sheave slip due to car lock, brake braking force decrease, rope slip and brake braking force decrease. MPU 12c which is a determination processing device for determining which
When the PU 12c detects a rope slip, a sheave idling due to a car lock, a decrease in brake braking force, and a precursor of the abnormality of the rope slip and the decrease in brake braking force, the PU 12c includes an output unit 12d that transmits a signal indicating abnormality to the alarm device 13. Have been. The alerting device 13 is connected via a telephone line L to a monitoring center 14, which is usually located at a remote location, and is configured to report any abnormality of the elevator.

Next, the operation of the above-described elevator diagnostic apparatus will be described with reference to a flowchart shown in FIG. First, after the elevator car 2 is operated in step S1,
When the input unit 12a of the determination device 12 detects a stop command output from the control device 11 at an arbitrary floor position, in step S2, the number of output pulses of the motor-side movement amount measurement device 6 and the car-side movement amount measurement device 10 Is measured by the MPU 12c. Next, in step S3, a determination value that is an allowable maximum value of the number of output pulses of the motor-side movement amount measurement device 6 stored in the storage unit 12b in advance, and the determination value of the motor-side movement amount measurement device 6 measured in step S2. The number of output pulses is compared by the MPU 12c. As a result, when the number of output pulses of the motor-side movement amount measuring device 6 does not exceed the determination value, in step S4, the car-side movement amount measuring device 1 stored in the storage unit 12b in advance.
The MPU 12c compares the determination value, which is the allowable maximum value of the number of output pulses of 0, with the number of output pulses of the car-side movement amount measuring device 10 measured in step S2, and
If the number of output pulses exceeds the determination value, the state of the rope slip 16 in the time chart shown in FIG. 3 is established, and thus it is determined in step S5 that a predictive phenomenon of a rope slip abnormality has been detected. However, if the number of output pulses of the car-side movement amount measuring device 10 does not exceed the determination value in step S4, the process returns to START.

On the other hand, if it is determined in step S3 that the number of output pulses of the motor-side movement amount measuring device 6 exceeds the determination value, the process proceeds to step S6, where the car-side movement amount measuring device 1
The count value of 0 is compared with the judgment value. At this time, if the number of output pulses of the car-side movement amount measuring device 10 does not exceed the determination value, the sheave idling by car lock 1 shown in FIG.
In step S7, it is determined in step S7 that a sign phenomenon of an abnormality in sheave idling due to car lock has been detected.

However, if the number of output pulses from the car-side movement amount measuring device 10 exceeds the determination value in step S6, the process proceeds to step S8. In this step S8, the number of output pulses of the car-side movement amount measuring device 10 and the number of output pulses of the motor-side movement amount measuring device 6 are compared by the MPU 12c. If the difference between these two output pulse numbers is 0, FIG. Since the state of the braking force drop 18 shown in FIG.
It is determined that a predictive phenomenon of an abnormality of a decrease in brake braking force has been detected. On the other hand, in step S8, the car-side movement amount measuring device 1
The difference between 0 and the number of output pulses of the motor-side movement amount measuring device 6 is 0.
If not, the state of rope slip and brake braking force drop 19 shown in FIG. 3 is reached, so it is determined in step S9 that a predictive phenomenon of rope slip and brake braking force drop abnormality has been detected.

When the abnormality sign phenomenon shown in steps S5, S7, S9 and S10 is detected, the MPU 12c counts the number of times, returns to START again and repeats the same trial. If the predictive phenomenon is detected twice consecutively, it is determined that an abnormal predictive signal has been detected in step S12, and an abnormal predictive signal is issued from the alarm device 12 to the monitoring center 13 in step S13. The monitoring center 13 receiving the notification informs the sales office (not shown) that manages the elevator, and dispatches the maintenance staff to the site at the office where the communication is received.

As described above, the number of output pulses of the motor-side movement amount measuring device 6 and the car-side movement amount measuring device 10 after the detection of the stop command is measured and compared with a predetermined judgment value or the motor-side movement amount measurement. By comparing the difference in the number of output pulses between the device 6 and the car-side movement amount measuring device 10, the rope slip 1
6. The status of the sheave idling 17 due to car lock, the decrease in brake braking force 18, the state of rope slip and the decrease in brake braking force 19 can be constantly monitored and diagnosed, so that these abnormal signs are signaled before the elevator malfunctions. Can be found, and the failure rate of the elevator can be greatly reduced. The diagnosis by the elevator diagnostic device may be performed during a special maintenance operation performed at night when the number of users is small, or by selecting data necessary for diagnosis from operation data collected during normal operation. You may do it.

In the above-described embodiment, the motor-side movement amount measuring device 6 is constituted by the motor-side encoder provided on the governor side to detect the traveling distance and position of the car, and the stop command is determined from the number of output pulses. Since the movement amount after detection is measured, addition of a new device can be suppressed and the configuration can be simplified, but a dedicated movement amount measurement device different from the encoder may be provided.

[0015]

As described above, the elevator diagnostic apparatus according to the present invention measures the respective movement amounts after detecting the stop command from the motor-side movement amount measurement device and the car-side movement amount measurement device, and determines the movement amount of both. And a judgment device for diagnosing rope slip, sheave idling due to car lock, brake braking force reduction, rope slip and brake braking force reduction by comparing the difference with the predetermined judgment value, etc. Prior to this, it is possible to determine the signs of abnormalities such as rope slippage, sheave idling due to car lock, brake braking force decrease, rope slippage and brake braking force decrease, etc., so that it is possible to grasp the necessity of inspection before an abnormality occurs.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an elevator diagnostic apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the elevator diagnostic apparatus shown in FIG.

FIG. 3 is a time chart showing criteria for the elevator diagnostic device shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor 2 Riding car 3 Sheave 6 Motor side moving amount measuring device 7 Governor pulley 8 Governor rope 9 Governor 10 Car side moving amount measuring device 11 Control device 12 Judgment device 13 Alarm device 14 Monitoring center

Claims (4)

[Claims] An elevator diagnosis apparatus for diagnosing an abnormality of an elevator, comprising: a car ascending and descending via a main rope by rotation of a sheave driven by a motor; and a brake for stopping the car. A motor-side movement amount measuring device for measuring the motor-side movement amount after detection of the elevator stop command; and a car-side movement amount measurement for measuring the car side movement amount after detection of the elevator stop command. Judgment to judge rope sliding, sheave idling due to car lock, brake braking force decrease, and a sign of abnormality of rope slip and brake braking force decrease from the device and the movement amount of both of these movement amount measuring devices and a predetermined determination value. A diagnostic device for an elevator, comprising a device. 2. The apparatus according to claim 1, wherein the determination device determines that the movement is normal when the movement amounts measured by the two movement amount measurement devices are equal, and the movement by the motor-side movement amount measurement device. If the amount of movement by the car-side movement amount measuring device exceeds the above-mentioned judgment value even though the amount is equal to or less than the above-mentioned judgment value, it is determined that the rope has slipped, and the amount of movement by the motor-side movement amount measuring device is If the movement amount by the car-side movement amount measuring device is equal to or less than the judgment value even though the judgment value is exceeded, it is determined that the sheave is idling due to the car lock, and the movement amount by both the movement amount measuring devices is determined by the above. If the difference exceeds 0 and the difference is 0, it is determined that the brake braking force is reduced. If the movement amount by the both movement amount measuring devices exceeds the determination value and the difference is not 0, the rope slip is determined. An elevator diagnostic apparatus characterized in that it is determined that the brake braking force has decreased. 3. The apparatus according to claim 1, wherein the determination device determines a sign of the rope slip, the sheave idling due to the car lock, the brake braking force decrease, and the abnormality of the rope slip and the brake braking force decrease. A diagnostic device for an elevator, wherein a notification is sent to a monitoring center connected via a telephone line. 4. A rider that ascends and descends via a main rope by rotation of a sheave driven by a motor, a governor that detects an overspeed of a governor rope that ascends and descends in synchronism with this rider, and a car from the governor to the car. A car-side encoder for calculating the traveling distance and position of the car, and a brake for diagnosing an abnormality of the elevator configured to include a brake for stopping the car, wherein the motor-side encoder after the detection of the elevator stop command is detected. Provide a motor-side movement amount measurement device that measures the movement amount of, the movement amount by this motor-side movement amount measurement device, the movement amount of the car after detecting the elevator stop command measured by the car-side encoder, Rope slip, sheave slip due to car lock, decrease in brake braking force, rope slip A diagnostic device for an elevator, further comprising a determining device for determining a sign of an abnormality in a reduction in brake braking force.