JP2015178410A - Elevator control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator control device capable of stopping an elevator at an accurate position during maintenance work even after the lapse of time.SOLUTION: An elevator control device includes a control part 12 for stopping a car 2 before the car 2 going up and down by an operation of a car upper operation part 5 during maintenance work for an elevator 1, and a balance weight 4 pass each other. There are included: a car position detection part 13 for detecting a position of the car 2; a balance weight detection sensor 14 detecting passing-by of the car 2 and the balance weight 4; a passing-by position recording device 20 recording as a passing-by position A, a detection result of the car position detection part 13 at the latest time point when passing-by of the car 2 and the balance weight 4 is detected with the balance weight detection sensor 14; and a stop position setting part 21 for setting a stop position B of the car 2 by a stoppage control part 21, based on the passing-by position A recorded in the passing-by position recording device 20.

Description

  The present invention relates to an elevator control device that controls the operation of an elevator during maintenance work.

  In general, an elevator is provided on a car provided in the hoistway, a counterweight suspended from the car and the main rope, and on the car. And an operation unit on the car. In the maintenance work of the elevator configured as described above, an operator moves up and down the car at a lower speed than the speed during normal operation by riding on the car and operating the operation unit on the car. The car is stopped at an appropriate position to check each device in the hoistway.

  Therefore, when the elevator car and the counterweight that pass up and down pass each other, the safety of the elevator maintenance work so that the body of the worker on the car does not protrude beyond the side of the car and come into contact with the counterweight. It is necessary to secure enough. In view of this, a technique has been proposed in which the passing position of the car and the counterweight is stored in advance and the car is stopped before the passing position (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 07-101644

  Since the prior art disclosed in Patent Document 1 measures the number of rotations of an electric motor that drives a car and a counterweight, and calculates the position of the car in the hoistway from this measurement result. When the main ropes holding the car and the counterweight are deteriorated and extended over time, the passing position of the car and the counterweight changes. For this reason, even if the passing position of the car and the counterweight is stored in advance, the passing position of the car and the counterweight that has already been stored becomes inappropriate as time passes. There is a concern that it cannot be stopped at any position.

  The present invention has been made in view of such a state of the art, and an object of the present invention is to provide an elevator control device that can stop an elevator at an accurate position during maintenance work even if time passes. is there.

  In order to achieve the above object, an elevator control apparatus according to the present invention includes a car provided in a hoistway, a counterweight suspended from the car and a main rope, and a car on the car. The elevator is provided in an elevator with an operation unit on a car that operates the operation of the car at the time of maintenance work, and the car is moved up and down by operation of the operation part on the car at the time of maintenance work of the elevator In an elevator control device having a stop control unit that stops the car before the counterweights pass each other, a car position detector that detects the position of the car, and a difference between the car and the counterweight. A passing detection unit to detect, and the car position detecting unit at the latest time point when the passing car and the counterweight passing are detected by the passing detection unit. A passing position recording device that records a result of passing as a passing position; and a stop position setting unit that sets a stop position of the car by the stop control unit based on the passing position recorded in the passing position recording device. It is characterized by having prepared.

  According to the elevator control device of the present invention, the elevator can be stopped at an accurate position during maintenance work even if time passes. Problems, configurations, and effects other than those described above will become apparent from the following description of embodiments.

It is a figure which shows the structure of one Embodiment of the elevator control apparatus which concerns on this invention. It is a figure explaining the detection of the passing of the riding car and the counterweight by the counterweight detection sensor which concerns on this embodiment. It is a figure explaining the stop position of the car set by the control part which concerns on this embodiment. It is a flowchart explaining the operation process of the elevator control apparatus which concerns on this embodiment, and is a flowchart which shows the operation process at the time of the normal driving | operation of an elevator. It is a flowchart explaining the operation process of the elevator control apparatus which concerns on this embodiment, and is a flowchart which shows the operation process at the time of the maintenance work of an elevator.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the elevator control apparatus which concerns on this invention is demonstrated based on figures.

  One embodiment of the control device according to the present invention is suspended through a car 2 provided in a hoistway and a car 2 and a main rope 3, as shown in FIG. A counterweight 4 for reducing the load applied to the hoisting machine 10 when the upper machine 10 is driven, and an on-car operation unit 5 provided on the car 2 for operating the car 2 during maintenance work; Is provided in the elevator 1.

  The elevator 1 is rotatably installed in a machine room (not shown) above the hoistway, and is disposed in the vicinity of the hoisting machine 10 around which the main rope 3 is wound, and the hoisting machine 10. By hanging the deflection vehicle 11 and the main rope 3 on the deflection vehicle 11, the car 2 can be moved up and down relatively without contacting the counterweight 4.

  The on-car operation unit 5 is connected to the I / F device 5A for connecting the devices to each other and performing input / output processing of signals between the devices, and the I / F device 5A. It is connected to the car operation switching device 5B and the I / F device 5A for switching from the driving to the maintenance work operation that enables the operation on the car 2 to operate the car 2 at a speed lower than the speed during normal operation. Connected to the low-speed UP driving device 5C to be raised and the I / F device 5A, connected to the low-speed DN driving device 5D for lowering the car 2 at a lower speed than the speed during normal operation, and the I / F device 5A for maintenance It has a buzzer sounding device 5E as a notification unit that alerts workers on the car 2 during work.

  The elevator control apparatus according to the present embodiment detects a control unit 12 that controls the operation of the elevator 1, a car position detection unit 13 that detects the position of the car 2, and a passing of the car 2 and the counterweight 4. The passing detection unit 14 is connected to the elevator 1, the control unit 12, the car operating unit 5, the car position detection unit 13, the passing detection unit 14, and a passing position recording device 20 described later, and between these devices. And an I / F device 15 for performing signal input / output processing.

  The control unit 12 includes a function as a stop control unit that stops the car 2 before the car 2 that moves up and down by the operation of the car operating unit 5 and the counterweight 4 pass each other during maintenance work of the elevator 1. . The car position detector 13 is attached to, for example, the rotating shaft of the hoisting machine 10 and is connected to the I / F device 15, and outputs a pulse signal corresponding to the rotational speed of the rotating shaft of the hoisting machine 10 to the control unit 12. The rotary encoder 13A and the pulse signal input from the rotary encoder 13A via the I / F device 15 are counted, and the moving amount of the car 2 from the floor surface on the lowest floor is counted based on the counted value of the pulse signal. And a car movement amount calculation unit 13B. In the calculation by the car movement amount calculation unit 13B, the count value of the floor of the lowest floor is set to zero.

  For example, the passing detection unit 14 is provided on the car 2, irradiates infrared light to the side of the counterweight 4, receives light reflected by the counterweight 4, and passes the counterweight 4 to pass the counterweight 4. It consists of a counterweight detection sensor for detecting. Therefore, as shown in FIG. 2, when the car 1 located at the lower part of the hoistway rises and the height position of the lower part of the counterweight detection sensor 14 and the counterweight 4 becomes the same, the counterweight sensor 14. Since the infrared rays emitted from the light hit the counterweight 4 and are reflected, the passing of the car 2 and the counterweight 4 is detected.

  In addition, as shown in FIG. 1, the elevator control apparatus according to the present embodiment includes a car position detection unit 13 at the latest time point when a passing weight between the car 2 and the counterweight 4 is detected by the counterweight detection sensor 14. A passing position recording apparatus 20 that records the detection result as a passing position A (see FIG. 2), and a stop position of the car 2 by the control unit 12 is set based on the passing position A recorded in the passing position recording apparatus 20. And a stop position setting unit 21. The stop position setting unit 21 is connected to, for example, the control unit 12 and the passing position recording device 20, and can communicate with the control unit 12 and the passing position recording device 20.

  Here, in the normal operation of the elevator 1, as the car 2 moves up and down, the car 2 and the counterweight 4 pass each other many times, but the counterweight detection sensor 14 described above and the car 2 The detection result of the car position detection unit 13 at the latest time point when the passing of the counterweight 4 is detected is that the car 2 and the counterweight 4 are the last before the operation of the elevator 1 is switched by the on-car operation unit 5. The position of the car 2 when passing by is shown.

  The passing position recording device 20 is, for example, at the latest time point when the passing weight of the car 2 and the counterweight 4 is detected by the counterweight detecting sensor 14 every time the car 2 travels during normal operation of the elevator 1. The minimum value of the detection result of the car position detector 13 is updated as the passing position A between the car 2 and the counterweight 4.

  The stop position setting unit 21 is configured such that the stop position of the car 2 by the control unit 12 is set to prevent a worker who performs work on the car 2 during maintenance work of the elevator 1 from contacting the counterweight 4. The position is set to be lower than the passing position A recorded in the passing position recording device 20 shown in FIG. In the present embodiment, in consideration of the height of the worker on the car 2 (assuming a maximum of 2 m), the stop position setting unit 21 is, for example, as shown in FIG. The stop position of the car 2 by the control unit 12 is set at a position B lower than the position A by a distance twice the height of the worker.

  Next, operation processing of the elevator control device according to the present embodiment will be described based on the flowcharts of FIGS. 4 and 5. First, in the normal operation of the elevator 1, an operation process related to the setting of the stop position of the car 2 by the control unit 12 will be described with reference to FIG.

  First, the passing position recording device 20 confirms whether or not the elevator 1 is in normal operation by checking whether or not the output signal of normal operation of the elevator 1 is received from the control unit 12 via the I / F device 15. Judgment is made (procedure S100). At this time, when the passing position recording apparatus 20 confirms that it has not received the output signal of the normal operation of the elevator 1 from the control unit 12 and has received the output signal of the maintenance work operation, the elevator 1 is not in normal operation. It is determined that the elevator 1 is in a maintenance operation (step S100 / NO), and the operation process related to the setting of the stop position of the car 2 by the control unit 12 is terminated.

  In step S100, when the passing position recording apparatus 20 confirms that the output signal of the normal operation of the elevator 1 has been received from the control unit 12, it determines that the elevator 1 is in normal operation (procedure S100 / YES). Whether or not the elevator 1 is in the ascending operation is determined by checking whether or not the output signal of the ascending operation (UP operation) of the elevator 1 is received from the control unit 12 via the / F device 15 (step S101). .

  At this time, when the passing position recording device 20 confirms that it has not received the output signal of the ascending operation of the elevator 1 from the control unit 12, the elevator 1 is not in the ascending operation, that is, the elevator 1 is in the stop operation or the descending operation. (Step S101 / NO), and the operation process related to the setting of the stop position of the car 2 by the control unit 12 is terminated.

  In step S101, the passing position recording device 20 determines that the elevator 1 is in the ascending operation after confirming that the output signal of the ascending operation of the elevator 1 is received from the control unit 12 (procedure S101 / YES). The state (ON state or OFF state) of the detection signal of passing between the car 2 and the counterweight 4 by the counterweight detection sensor 14 is confirmed via the / F device 15 (step S102).

  At this time, when the passing position recording device 20 confirms that the detection signal of the passing of the car 2 and the counterweight 4 by the counterweight detection sensor 14 is OFF (step S102 / NO), the control unit 12 The operation process relating to the setting of the stop position of the car 2 is terminated. On the other hand, in step S102, the passing position recording device 20 confirms that the detection signal of the passing between the car 2 and the counterweight 4 by the counterweight detection sensor 14 has changed from the OFF state to the ON state (step S102 / YES), the operation process of step S103 is performed.

  Here, the car movement amount calculation unit 13B counts the pulse signal input from the rotary encoder 13A via the I / F device 15 in the normal operation of the elevator 1, and determines the car 2 from the floor surface on the lowest floor. Since the movement amount is calculated and the position of the car 2 is constantly detected, the passing position recording device 20 in step S103, the car movement amount calculation unit 13B via the I / F device 15 performs the current car 2 2, that is, the position of the car 2 when the car 2 and the counterweight 4 pass each other is acquired and registered.

  Next, the passing position recording device 20 determines whether or not the registration of the position of the car 2 performed in step S103 is the first time (step S104). At this time, if the passing position recording device 20 determines that the position of the car 2 is registered for the first time (step S104 / YES), the position of the car 2 registered in step 103 is recorded as the passing position A (procedure). S106).

  On the other hand, in step S104, when the passing position recording device 20 determines that the registration of the position of the car 2 performed in step S103 is not the first time (step S104 / NO), the passing car 2 of the current car 2 registered in step S103. It is determined whether or not the position is lower than the passing position A that has already been recorded (step S105).

  In step S105, the passing position recording device 20 determines that the current position of the current car 2 registered in step S103 is not lower than the already recorded passing position A, that is, the current car 2 registered in step S103. Is determined to be the same as the already-recorded passing position A or higher than the already-recorded passing position A (step S105 / NO), the operation related to the setting of the stop position of the car 2 by the control unit 12 The process ends.

  On the other hand, when the passing position recording device 20 determines in step S105 that the current position of the car 2 registered in step S103 is lower than the passing position A already recorded (step S105 / YES), the passing position is recorded in step 103. The registered position of the current car 2 is updated as the passing position A (step S106).

  When the operation process of step S106 is performed, the stop position setting unit 21 determines the stop position B (see FIG. 3) of the car 2 by the control unit 12 based on the passing position A recorded in the passing position recording device 20. The setting is performed (procedure S107), and the operation process related to the setting of the stop position of the car 2 by the control unit 12 is ended.

  Next, operation processing related to stop control of the car 2 by the control unit 12 in the maintenance work operation of the elevator 1 when the worker performs maintenance work on the car 2 will be described with reference to FIG.

  The control unit 12 confirms whether or not the switching signal from the normal operation of the elevator 1 to the maintenance work operation is received from the on-cab operation switching device 5B via the I / F device 15, so that the elevator 1 is in the maintenance work operation. Is determined (step S200). At this time, when the control unit 12 confirms that the switching signal has not been received from the on-car operation switching device 5B, the control unit 12 determines that the elevator 1 is not in maintenance operation, that is, the elevator 1 is in normal operation (procedure). S200 / NO), the operation process related to the stop control of the car 2 by the control unit 12 is terminated.

  In step S200, when the control unit 12 confirms that the switching signal has been received from the on-car operation switching device 5B, the control unit 12 determines that the elevator 1 is in maintenance operation (procedure S200 / YES), and the I / F device 15 Whether or not the elevator 1 is in the ascending operation is determined by checking whether or not the output signal of the ascending operation (UP operation) of the elevator 1 is received from the low-speed UP operation device 5C (step S201).

  At this time, when the control unit 12 confirms that the output signal of the ascending operation of the elevator 1 has not been received from the low-speed UP operation device 5C, the elevator 1 is not in the ascending operation, that is, the elevator 1 is in the stop operation or the low-speed DN operation. It is determined that the descent operation is being performed by the device 5D (step S201 / NO), and the operation process related to the stop control of the car 2 by the control unit 12 is terminated.

  In step S201, when it is confirmed that the control unit 12 has received the output signal of the ascending operation of the elevator 1 from the low speed UP operation device 5C, the control unit 12 determines that the elevator 1 is in the ascending operation (step S201 / YES). The current position of the car 2 is acquired from the car movement amount calculation unit 13B via the / F device 15 (step S202).

  Next, the control unit 12 compares the current position of the car 2 acquired in step S202 with the stop position B of the car 2 set by the stop position setting unit 21 in step S107 shown in FIG. It is determined whether or not the car 2 has reached the stop position B (step S203). At this time, if the control unit 12 determines that the current position of the car 2 is lower than the stop position B of the car 2 and the car 2 has not reached the stop position B (step S203 / NO), step S203 is performed. The operation process from is repeated.

  On the other hand, in step S203, the control unit 12 determines that the current position of the car 2 is the same as the stop position B of the car 2 or higher than the stop position B of the car 2, and the car 2 reaches the stop position B. If it is determined that it has been performed (procedure S203 / YES), the buzzer sounding device 5E is operated via the I / F device 15 to sound the buzzer, thereby alerting the worker on the car 2 (procedure) S204).

  Then, for example, one second after the buzzer sounds in step S204, the control unit 12 stops driving the hoisting machine 10 and stops the car 2 (step S205). The operation process related to stop control is terminated.

  According to the elevator control apparatus according to the present embodiment configured as described above, even when the passing position A of the car 2 and the counterweight 4 changes due to the main rope 3 being deteriorated and extended over time, Since the passing position recording device 20 records the position of the car 2 at the latest time when the car 2 and the counterweight 4 have passed from the car movement amount calculation unit 13B as the passing position A, the stop position setting unit 21 The stop position B of the car 2 corresponding to the change in the passing position A between the car 2 and the counterweight 4 can be appropriately set. Thus, before the car 2 and the counterweight 4 pass each other during the maintenance work of the elevator 1, the control unit 12 sets the car 2 with reference to the stop position B of the car 2 set by the stop position setting unit 21. It can be stopped accurately.

  As described above, the elevator control device according to the present embodiment can stop the car 2 at an accurate position during maintenance work of the elevator 1 over time, so that excellent reliability can be obtained. it can.

  In the elevator control apparatus according to the present embodiment, the balance weight detection sensor 14 always detects the difference between the car 2 and the balance weight 4 during normal operation of the elevator 1, and every time the car 2 travels. Furthermore, the car at the time when the passing position A between the car 2 and the counterweight 4 recorded in the passing position recording device 20 is detected by the counterweight detecting sensor 14 is detected. Since it is updated to the minimum value of position 2, it is possible to efficiently cope with a change in the passing position A between the car 2 and the counterweight 4. Thereby, since the stop control of the car 2 by the control unit 12 can be executed satisfactorily, the safety in the maintenance work of the elevator 1 can be further improved.

  In addition, this embodiment mentioned above was described in detail in order to demonstrate this invention easily, and is not necessarily limited to what is provided with all the demonstrated structures. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment.

DESCRIPTION OF SYMBOLS 1 Elevator 2 Car 3 Main rope 4 Counterweight 5 Car operation part 5A I / F device 5B Car operation switching device 5C Low speed UP operation device 5D Low speed DN operation device 5E Buzzer sounding device 10 Hoisting machine 11 Bending car 12 Control unit 13 Car position detection unit 13A Rotary encoder (car position detection unit)
13B Car movement amount calculation part (car position detection part)
14 Balance weight detection sensor (passing detection unit)
15 I / F device 20 Passing position recording device 21 Stop position setting unit

Claims (2)

A car provided in the hoistway, a counterweight suspended via the main car rope, and a car provided on the car for operating the car during maintenance work Provided in an elevator with an upper operation part,
In the elevator control device comprising a stop control unit for stopping the car before the car and the counterweight that pass up and down by operation of the operation unit on the car during maintenance work of the elevator,
A car position detector for detecting the position of the car;
A passing detection unit that detects passing of the counterweight and the counterweight;
A passing position recording device that records the detection result of the car position detecting unit at the latest time when the passing car and the passing weight of the counterweight are detected by the passing detection unit as a passing position;
An elevator control device comprising: a stop position setting unit configured to set a stop position of the car by the stop control unit based on the passing position recorded in the passing position recording device. In the elevator control device according to claim 1,
The passing position recording device includes the car position detecting unit at the latest time point when the passing of the car and the counterweight is detected by the passing detecting unit every time the car travels during normal operation of the elevator. An elevator control device, wherein the minimum value of the detection result is updated as the passing position.