JP2010089869A - Rope slipping detection device of elevator and elevator device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rope slipping detection device of an elevator which can inexpensively be obtained while being compact in constitution, capable of reducing the number of part items required for constituting the whole device, without requiring to separately arrange a pulse encoder on the governor side. <P>SOLUTION: The rope slipping detection device of the elevator has a car of the elevator, a driving device for driving the lifting of the car, the pulse encoder for detecting a rotating speed of the driving device, a travel condition detecting means for detecting a travel condition of the car, a data storage part for storing encoder pulse data outputted from the pulse encoder when the car travels and travel condition data outputted from the travel condition detecting means, and a data arithmetic operation part for determining that a traction capacity is reduced when a difference in the encoder pulse data between this time and the last time reaches a reference value or larger by acquiring the encoder pulse data from the data storage part in the last time travel when the travel condition is the same. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an elevator rope slip detection device and an elevator device using the same.

In the traction drive type elevator, the main rope that suspends the car and the counterweight is wrapped around the sheave of the drive unit and suspended, and the car is driven by the traction (friction) between the sheave and the rope. It is the composition to do.
Since the traction capacity is determined by the shape of the sheave groove and the friction coefficient, the traction design is made in consideration of changes in the shape of the sheave groove and the coefficient of friction due to wear over time.
However, due to unintended disturbances such as the sheave groove being worn abnormally or oil or water adhering to the sheave groove or main rope, the traction capacity will gradually decline to ensure the required traction capacity. If it becomes impossible, the landing position when the car stops on the landing floor when a traction slip (rope slip) occurs between the sheave groove and the rope when the car is running, especially during acceleration / deceleration There is a possibility that the car will slip or the car will slip excessively during acceleration / deceleration.

  In a conventional elevator rope slip detection device for detecting such rope slip, a motor-side travel amount measuring device that calculates the travel distance of a car based on the number of revolutions of a drive device (motor) or sheave ( Motor side pulse encoder), car side movement amount measuring device (car side pulse encoder) that calculates the movement amount of the car based on the number of revolutions of the governor pulley, and when a stop command is issued while the car is running, Judgment device that measures the amount of movement until stopping with a motor side movement amount measuring device and a car side movement amount measuring device, and judges each sign of abnormality such as rope slipping from the difference between them and comparison with a preset judgment value Are known (for example, see Patent Document 1).

Japanese Patent Application Laid-Open No. 11-199153

However, in the conventional elevator rope slip detection device disclosed in Patent Document 1, not only the drive device side but also the governor side must be provided with a car-side pulse encoder that separately detects the rotation speed of the governor pulley. There is a problem that the number of parts required for the configuration of the entire apparatus increases, which complicates the configuration and increases costs.
In addition, the occurrence of rope slip is detected by the conventional elevator rope slip detection device only during braking after the stop command is output from the control device, and during the running, the rope slip detection operation is performed. Not performed. Therefore, even if a rope slip occurs while the passenger is traveling in the car, the rope slip occurrence cannot be detected until a stop command is output and braking is started. There is also a problem that it is not possible to take an appropriate response.
Furthermore, with respect to the reference value for determining the occurrence of rope slip, the braking distance of the car is measured in advance by the work of an operator or the like during normal operation of the elevator, and it is determined whether this is appropriate as the reference value and stored in the device. There is also a problem that this measurement, determination, and storage work require a complicated work.

The present invention has been made to solve the above-mentioned problems. The first object is to provide a car that detects the rotational speed of the governor pulley separately on the governor side, because the necessary pulse encoder is only on the driving device side. There is no need to provide a side pulse encoder, and the number of parts required for the overall configuration of the apparatus is small, the configuration is simple, and an elevator rope slip detection device that can be obtained at low cost and an elevator device using the same are obtained. .
In addition, the second purpose is to detect a rope slip occurring in a state where the passenger is traveling in the car, and based on the detection result, it is particularly suitable for the passenger in the car. It is possible to obtain an elevator rope slip detection device and an elevator device using the same.
Furthermore, a third object is to provide an elevator rope slip detection device that does not require work by an operator or the like to measure in advance the braking distance of a car during normal operation of the elevator, with respect to a reference value for determining the occurrence of rope slip. An elevator apparatus using the same is obtained.

  In the elevator rope slip detection device according to the present invention, the car disposed in the elevator hoistway so as to freely move up and down, the drive device for driving the raising and lowering of the car, and the drive device are provided with the drive. From a pulse encoder that detects the number of revolutions of the device, traveling condition detection means that detects the traveling condition of the car, encoder pulse data that is output from the pulse encoder when the car is traveling, and traveling condition detection means Based on the data accumulation unit for accumulating the traveling condition data to be output and the traveling condition data at the time of traveling of the car, the encoder pulse data at the previous traveling with the same traveling condition is the data. The current running time obtained from the data stored in the storage unit and output from the pulse encoder If the difference between the encoder pulse data and the encoder pulse data at the previous run under the same running conditions obtained from the data storage unit is greater than or equal to a predetermined reference value, the traction capability is reduced. And a data operation unit that determines that the operation is performed.

  Further, in the elevator apparatus using the elevator rope slip detection apparatus according to the present invention, the elevator apparatus using the above-described rope slip detection apparatus, wherein the data calculation unit determines that the traction capability is reduced. In such a case, a control command unit for stopping the operation of the elevator is provided.

  The present invention relates to an elevator rope slip detection device and an elevator device using the same, a car that is arranged to be raised and lowered in an elevator hoistway, a drive device that drives raising and lowering of the car, and the drive device. A pulse encoder that detects the number of rotations of the driving device, traveling condition detection means that detects a traveling condition of the car, encoder pulse data that is output from the pulse encoder when the car is traveling, and Based on the traveling condition data output from the traveling condition detection means and the traveling condition data when the car is traveling, the encoder at the previous traveling when the traveling conditions are the same. Obtain pulse data from the data stored in the data storage unit, The difference between the output encoder pulse data during the current run and the encoder pulse data during the previous run under the same running conditions acquired from the data storage unit is equal to or greater than a predetermined reference value. In this case, the configuration includes a data calculation unit that determines that the traction capability is reduced, so that the necessary pulse encoder is only on the driving device side, and the speed of the governor pulley is separately set on the governor side. There is no need to provide a car-side pulse encoder to be detected, and the number of parts required for the configuration of the entire apparatus is small, and the configuration is simple and can be obtained at low cost.

  Further, in an elevator apparatus using an elevator rope slip detection apparatus, the elevator apparatus using the rope slip detection apparatus described above, when the data calculation unit determines that the traction capability is reduced, By having a configuration including a control command unit for stopping the operation of the elevator, it is possible to detect a rope slip that occurs in a state where a passenger is traveling in a car, and based on this detection result, There is an effect that an appropriate response can be taken for passengers in the car.

Embodiment 1 FIG.
1 and 2 relate to Embodiment 1 of the present invention, FIG. 1 is a block diagram showing the overall configuration of an elevator rope slip detection device, and FIG. 2 is an elevator device using the elevator rope slip detection device. It is a flowchart which shows operation | movement.
In the figure, reference numeral 1 denotes a drive device that is installed in a machine room (not shown) provided above an elevator hoistway (not shown) and electrically drives the elevator, and a sheave 2 that is attached to the rotation shaft of the drive device 1. The main rope 3 is wound around.
The main rope 3 is connected to one end of a car 4 that can be raised and lowered in the hoistway. The other end of the main rope 3 adjusts the suspension position of the main rope 3. And a counterweight 6 disposed in the hoistway is connected to the other end of the main rope 3 so as to compensate for the weight of the car 4. Yes.
In addition, the drive device 1 is provided with a pulse encoder 7 that outputs a pulse corresponding to the rotation speed of the drive device 1 (that is, the rotation speed of the driving wheel 5).

Reference numeral 8 denotes a control device 8 that controls the overall operation of the elevator, and includes a data storage unit 9, a data calculation unit 10, and a control command unit 11.
The encoder pulse data 12 output from the pulse encoder 7 when the car 4 is traveling, and a scale device (not shown) that is provided under the floor of the car 4 and detects a load mounted in the car 4 The car load data 13 output from the car and car position data 14 output from car position detection means (not shown) provided in the car 4 and comprising information indicating the current position of the car 4 are the data. Input to the storage unit 9, the data storage unit 9 stores the encoder pulse data 12, the in-car load data 13 and the car position data 14 in association in time series.
The car position detecting means for outputting the car position data 14 is provided separately from the pulse encoder 7, for example, a landing plate that defines the floor stop position of the car 4. It is possible to use it.

The data calculation unit 10 determines the driving conditions, that is, the load mounted in the car 4 and the car based on the car load data 13 and the car position data 14 when the car 4 is running. The encoder pulse data 12 at the time of the previous run with the same running distance of 4 is acquired from the data stored in the data storage unit 9.
Then, the data calculation unit 10 outputs the encoder pulse data 12 at the time of current traveling output from the pulse encoder 7 and the encoder pulse data at the previous time of traveling under the same traveling condition acquired from the data storage unit 9. If the absolute value of these differences is equal to or greater than a predetermined reference value, the traction capability between the sheave 2 and the main rope 3 of the elevator is It judges that it has fallen, and outputs the signal which shows that to the said control instruction | command part 11. FIG.
The determination regarding the traction capability by the data calculation unit 10 is performed as needed while the car 4 is traveling. In addition, the ranges in which the traveling conditions are determined to be the same may not be completely the same. For example, the difference in the car load data 13 is within a predetermined range and can be regarded as the same. included.

The control command unit 11 that has received a signal from the data calculation unit 10 that the traction capability has been reduced, sets the car 4 to the destination floor where the call registration has been made or the car 4 can be stopped. A control command for the operation of the driving device 1 is performed so as to travel to the floor, and after the car 4 arrives at the destination floor or the nearest floor, the operation of the elevator is suspended.
And after an elevator stop, the said control instruction | command part 11 alert | reports to the maintenance company which does not illustrate that the traction capability falls, and urges a maintenance check.

  The weighing device and the car position detecting means constitute a running condition detecting means for detecting the running condition, and the car load data 13 and the car position data 14 output from these are the running condition data. Constitute.

The flowchart of FIG. 2 shows the operation of the elevator rope slip detection device and the elevator device using the same in this embodiment.
First, during the traveling of the car 4 (step S1), the data accumulating unit 9 includes the encoder pulse data 12 output from the pulse encoder 7, the car load data 13 output from the scale device, Then, the car position data 14 output from the car position detecting means is recorded and stored (step S2).
In step S3, the data calculation unit 10 determines whether or not the change amount of the encoder pulse data 12 under the same traveling condition is equal to or less than a predetermined reference value. That is, more specifically, based on the data calculation unit 10, the in-car load data 13 and the car position data 14, the encoder pulse data 12 at the previous travel with the same travel condition is stored in the data storage unit 9. Acquired from the accumulated data, the encoder pulse data 12 at the previous run under the same running conditions obtained from the data storage unit 9, and the encoder pulse at the current run output from the pulse encoder 7 A comparison operation with the data 12 is performed to determine whether or not these differences are equal to or less than a predetermined reference value.

In this determination, when it is determined that the change amount of the encoder pulse data 12 under the same traveling condition is equal to or less than a predetermined reference value, it is determined that the traction capability is not lowered and is within the normal range. The process proceeds to step S4, the normal operation is continued, and the process returns to step S1.
On the other hand, if it is determined in step S3 that the amount of change in the encoder pulse data 12 under the same traveling condition is not less than or equal to a predetermined reference value, it is determined that the traction capability has decreased, and the data The calculation unit 10 outputs a signal indicating that to the control command unit 11.
Then, the process proceeds to step S5, and the control command unit 11 that has received a signal from the data calculation unit 10 that the traction capability has decreased, travels to the destination floor where the car 4 is called and registered. Then, a control command is given to the driving device 1 so as to stop the operation of the elevator. Here, instead of causing the car 4 to travel to the destination floor, the elevator 4 may be stopped after traveling to the nearest floor where the car 4 can stop.
In the subsequent step S6, after the elevator is stopped, the control command unit 11 notifies the maintenance company that the traction capacity is reduced, prompts maintenance inspection, and then proceeds to step S7 to complete a series of operation flow. To do.

  In the elevator rope slip detection device configured as described above and the elevator device using the same, a pulse encoder that detects the rotational speed of the driving device, a travel condition detection means that detects a travel condition of the car, A data storage unit that stores encoder pulse data output from the pulse encoder during traveling of the car and traveling condition data output from the traveling condition detection means, and traveling conditions based on the traveling condition data during traveling of the car Is obtained from the data accumulated in the data storage unit, and the current encoder pulse data output from the pulse encoder is the same as the data obtained from the data storage unit. The difference from the encoder pulse data from the previous run in the running conditions is determined in advance. And a data calculation unit that determines that the traction capability is reduced when the reference value is equal to or greater than a predetermined reference value, the necessary pulse encoder is only on the drive device side, and on the governor side. There is no need to separately provide a car-side pulse encoder that detects the number of revolutions of the governor pulley, the number of parts required for the overall system configuration is small, the configuration is simple and can be obtained at low cost, and a standard for determining the occurrence of rope slippage With respect to the value, work by an operator or the like that measures in advance the braking distance of the car during normal operation of the elevator is unnecessary.

  In addition, in an elevator apparatus using such a rope slip detection apparatus, when the data calculation unit determines that the traction capability is reduced, the destination floor or the car on which the car is called and registered is registered. Command the operation of the drive unit so that it can travel to the nearest floor where it can stop, and after the car arrives at the destination floor or the nearest floor, stop the elevator operation, It is possible to detect a rope slip occurring in a state where the passenger is traveling and to take an appropriate response particularly to the passenger in the car based on the detection result.

Embodiment 2. FIG.
FIG. 3 relates to Embodiment 2 of the present invention, and is a flowchart showing the operation of the elevator apparatus using the elevator rope slip detection apparatus.
In the second embodiment described here, in the configuration and operation of the first embodiment described above, the amount of change in encoder pulse data under the same traveling condition exceeds a predetermined reference value, and the traction capability is reduced. In this case, the traveling speed of the car is lowered from the normal time to travel to the destination floor or the nearest floor.
In other words, the control command unit 11 that has received a signal indicating that the traction capability has decreased from the data calculation unit 10 can stop the car 4, the destination floor where the call registration is made, or the car 4. After the arrival of the car 4 at the destination floor or the nearest floor, the control command for the operation of the drive device 1 is performed so that the vehicle travels to the nearest floor at a lower traveling speed than usual. The operation of the elevator is suspended.
Other configurations are the same as those in the first embodiment.

The flow diagram of FIG. 3 shows the operation of the elevator rope slip detection device and the elevator device using the same in this embodiment, and is the same as the operation of the first embodiment except for the operation of step S15 described below. It is.
That is, first, during the traveling of the car 4 (step S11), the data accumulating unit 9 outputs the encoder pulse data 12 output from the pulse encoder 7 and the load data in the car output from the scale device. 13 and the car position data 14 output from the car position detecting means is recorded and stored (step S12).
In step S13, the data calculation unit 10 determines whether or not the amount of change in the encoder pulse data 12 under the same traveling condition is equal to or less than a predetermined reference value.

In this determination, when it is determined that the change amount of the encoder pulse data 12 under the same traveling condition is equal to or less than a predetermined reference value, it is determined that the traction capability is not lowered and is within the normal range. Then, the process proceeds to step S14, the normal operation is continued, and the process returns to step S11.
On the other hand, if it is determined in step S13 that the amount of change in the encoder pulse data 12 under the same traveling condition is not less than or equal to a predetermined reference value, it is determined that the traction capability has decreased, and the data The calculation unit 10 outputs a signal indicating that to the control command unit 11.
Then, the process proceeds to step S15, and the control command unit 11 that has received a signal from the data calculation unit 10 that the traction capability has decreased reduces the traveling speed of the car 4 as compared with the normal time. After the control command for the driving device 1 is issued, in the subsequent step S16, the driving device 1 is caused to stop the operation of the elevator after the car 4 has traveled to the destination floor or the nearest floor. The control command for is performed.
In addition, after the elevator is stopped in step S16, the process proceeds to step S17, where the control command unit 11 notifies the maintenance company that the traction capacity is reduced, prompts maintenance inspection, and then proceeds to step S18. The operation flow of is terminated.

  In the elevator rope slip detection device configured as described above and the elevator device using the same, in addition to being able to achieve the same effects as in the first embodiment, the control command unit includes a data calculation unit. When it is determined that the traction capacity is reduced, the car is controlled by commanding the operation of the driving device so that the car travels to the destination floor or the nearest floor at a slower traveling speed than normal. When a rope slip occurring in a state where a passenger is traveling inside is detected, it is possible to take a countermeasure in consideration of passenger safety.

Embodiment 3 FIG.
FIG. 4 relates to Embodiment 3 of the present invention, and is a flowchart showing the operation of an elevator apparatus using an elevator rope slip detection apparatus.
In Embodiment 3 described here, in the configuration and operation of Embodiment 1 or Embodiment 2 described above, the amount of change in encoder pulse data under the same traveling condition exceeds a predetermined reference value, and the traction capability When the data calculation unit determines that the vehicle has decreased, drive to the destination floor or the nearest floor by lowering one or both of acceleration during deceleration and deceleration during deceleration of the car. It is made to let you.
In other words, the control command unit 11 that has received a signal indicating that the traction capability has decreased from the data calculation unit 10 can stop the car 4, the destination floor where the call registration is made, or the car 4. A control command for the operation of the drive device 1 is performed so that one or both of acceleration at the time of acceleration and deceleration at the time of deceleration is made lower than the normal time. After the car 4 arrives at the nearest floor, the operation of the elevator is suspended.
Other configurations are the same as those in the first or second embodiment.

The flowchart of FIG. 4 shows the operation of the elevator rope slip detection device and the elevator device using the same in this embodiment.
Here, in the above-described first embodiment, when the data calculation unit determines that the traction capability is reduced, one or both of the acceleration at the time of acceleration of the car and the deceleration at the time of deceleration are normally set. The case where the vehicle is driven to the destination floor or the nearest floor will be described below, and is the same as the operation of the first embodiment except for the operation of step S25 described below.
That is, first, during the traveling of the car 4 (step S21), the data accumulating unit 9 performs the encoder pulse data 12 output from the pulse encoder 7 and the in-car load data output from the scale device. 13 and the car position data 14 output from the car position detecting means is recorded and stored (step S22).
In step S23, the data calculation unit 10 determines whether or not the change amount of the encoder pulse data 12 under the same traveling condition is equal to or less than a predetermined reference value.

In this determination, when it is determined that the change amount of the encoder pulse data 12 under the same traveling condition is equal to or less than a predetermined reference value, it is determined that the traction capability is not lowered and is within the normal range. The process proceeds to step S24, the normal operation is continued, and the process returns to step S21.
On the other hand, if it is determined in step S23 that the amount of change in the encoder pulse data 12 under the same traveling condition is not less than a predetermined reference value, it is determined that the traction capability has decreased, and the data The calculation unit 10 outputs a signal indicating that to the control command unit 11.
Then, the process proceeds to step S25, and the control command unit 11 that receives a signal indicating that the traction capability is reduced from the data calculation unit 10 determines the acceleration at the time of acceleration of the car 4 and the deceleration at the time of deceleration. After a control command is given to the drive device 1 so that one or both of them travels lower than usual, in the subsequent step S26, the car 4 travels to the destination floor or the nearest floor. Then, a control command is given to the driving device 1 so as to stop the operation of the elevator.
In addition, after the elevator is stopped in step S26, the process proceeds to step S27, where the control command unit 11 notifies the maintenance company that the traction capacity is reduced, prompts maintenance inspection, and then proceeds to step S28. The operation flow of is terminated.

In the configuration and operation of the above-described second embodiment, when the data calculation unit determines that the traction capability is reduced, either one of acceleration during acceleration and deceleration during deceleration of the car or Of course, it is also possible to drive both to the destination floor or the nearest floor lower than normal.
In this case, in step S25, the traveling speed of the car 4 is made slower than normal, and either one or both of acceleration during acceleration and deceleration during deceleration of the car 4 are normally set. A control command is issued to the drive device 1 so that the vehicle travels at a lower time.

  In the elevator rope slip detection device configured as described above and the elevator device using the same, in addition to being able to achieve the same effects as those of the first or second embodiment, the control command unit includes When the data calculation unit determines that the traction capability is reduced, the vehicle is moved to the destination floor or the nearest floor with either one or both of the acceleration and deceleration of the car lowered than usual. By taking control commands for the operation of the drive device so that it can be used, when a rope slip that occurs while traveling with passengers in the car is detected, take further measures taking passenger safety into consideration Can do.

It is a block diagram which shows the whole structure of the elevator rope slip detection apparatus in Embodiment 1 of this invention. It is a flowchart which shows operation | movement of the elevator apparatus using the rope slip detection apparatus of the elevator in Embodiment 1 of this invention. It is a flowchart which shows operation | movement of the elevator apparatus using the rope slip detection apparatus of the elevator in Embodiment 2 of this invention. It is a flowchart which shows operation | movement of the elevator apparatus using the rope slip detection apparatus of the elevator in Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drive device 2 Sheave 3 Main rope 4 Car 5 Rope car 6 Balance wheel 7 Counterweight 7 Pulse encoder 8 Control device 9 Data accumulation part 10 Data operation part 11 Control command part 12 Encoder pulse data 13 Car load data 14 Car position data 14

Claims (6)

A car that can be moved up and down in the elevator hoistway,
A driving device for driving raising and lowering of the car;
A pulse encoder provided in the drive device for detecting the rotational speed of the drive device;
Traveling condition detecting means for detecting the traveling condition of the car;
A data accumulating unit for accumulating encoder pulse data output from the pulse encoder and the traveling condition data output from the traveling condition detection means during traveling of the car;
Based on the traveling condition data at the time of traveling of the car, the encoder pulse data at the previous traveling when the traveling conditions are the same is obtained from the data accumulated in the data accumulating unit, and from the pulse encoder The difference between the output encoder pulse data during the current run and the encoder pulse data during the previous run under the same running conditions acquired from the data storage unit is equal to or greater than a predetermined reference value. In this case, an elevator rope slip detection device comprising: a data calculation unit that determines that the traction capability is reduced. The travel condition detection means includes
A scale device provided under the floor of the car, detecting a load mounted in the car, and outputting car load data;
Car position detection means for outputting car position data comprising information indicating the current position of the car,
2. The elevator rope slip detection device according to claim 1, wherein the traveling condition data includes the car load data and the car position data. An elevator device using the elevator rope slip detection device according to claim 1 or 2,
An elevator apparatus comprising: a control command unit that stops the operation of the elevator when the data calculation unit determines that the traction capability is reduced.   When the data calculation unit determines that the traction capability is reduced, the control command unit calls the car and registers the destination floor where the car is registered or the nearest floor where the car can stop. The operation control of the drive device is performed so as to run, and the elevator operation is stopped after the car arrives at the destination floor or the nearest floor. Elevator device.   The control command unit causes the car to travel to the destination floor or the nearest floor at a travel speed slower than normal when the data calculation unit determines that the traction capability is reduced. The elevator apparatus according to claim 4, wherein a control command for the operation of the driving apparatus is issued.   The control command unit, when the data calculation unit determines that the traction capability is lowered, either the acceleration or deceleration of the car to the destination floor or the nearest floor 6. The elevator apparatus according to claim 4 or 5, wherein a control command for the operation of the drive device is issued so that both of them are caused to travel lower than usual.

Images