JP2009215046A - Terminal floor forced reduction gear for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and safely check operating state without needing troublesome work. <P>SOLUTION: When a mode selector switch 26 sets an inspection mode, a control section 24 provided in a terminal floor forced reduction gear 23 performs inspection operation for a car 13 at a constant speed lower than a rated speed. The car 13 is controlled to be stopped by comparing speed data when the car 13 passes through limit switches 12a, 12b, 12c during the inspection operation with limiting speed data for inspection operation predetermined in a second memory section 29. Thereby, it is determined whether or not the terminal floor forced reduction gear 23 is normally operated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elevator final floor forced deceleration device that detects an abnormal speed of a car on the lowermost floor or the uppermost floor of a hoistway and forcibly decelerates.

  In the elevator system, the terminal floor forced deceleration device is used so that even if the car cannot normally land on the lowest floor or the top floor due to some control abnormality, etc., it can stop safely even if the floor level is exceeded. It has a safety device called.

  This terminal floor forced deceleration device has a plurality of limit switches arranged at equal intervals in the traveling direction on the lowermost floor and the uppermost floor, and the passing position of the car at the ON / OFF timing of these limit switches And detect the speed and operate to stop the car urgently.

  The distance until the car is stopped by the terminal floor forced reduction device depends on the rated speed of the elevator. On the other hand, the depth of the pit portion with respect to the floor level position of the lowest floor and the size of the gap between the upper end of the car and the top of the hoistway at the floor level of the uppermost floor are set for each rated speed of the elevator. That is, the rated speed of the elevator is determined by the dimensions of the pit portion and the top portion of the hoistway.

  Here, for example, when an aging elevator is renewed, it is common to replace the set of elevator devices while leaving the hoistway as it is. At that time, since the dimensions of the hoistway cannot be structurally changed, the operating speed may not be increased even if the renewal is performed.

  As a method for solving such a problem, a so-called “variable speed control system” in which the rated speed is changed in accordance with the car position is considered. This is to operate at the rated speed according to the hoistway dimensions at the terminal floor portion of the hoistway, and to operate faster than the normal rated speed at the intermediate floor portion.

Further, in an elevator using such a variable speed control system, the terminal floor forced reduction device is one of the safety devices so that the car does not travel on the terminal floor portion while maintaining the operation speed on the intermediate floor due to control abnormality. (For example, Patent Document 1).
Japanese Examined Patent Publication No. 61-3751

  The terminal floor forced deceleration device described above operates when the car is driven at a speed exceeding a preset driving speed in the vicinity of the terminal floor. For this reason, although it does not operate in a normal state (that is, in a state where there is no control abnormality), it is necessary to periodically inspect the terminal floor forced reduction device so that it operates reliably when a control abnormality occurs.

  As an inspection method, move the limit switch installation position in the opposite direction to the terminal floor and advance the speed detection timing earlier than usual (that is, calculate when the deceleration during landing control is not sufficient). There is a method of generating an abnormal speed condition when viewed from the forced deceleration device side. However, in such a method, it is necessary to move the limit switch at every inspection, and it is also necessary to return the limit switch to the original position after the inspection. bad.

  The present invention has been made in view of the above points, and an object thereof is to provide an elevator terminal floor forced reduction device that can easily and safely check the operation state without requiring troublesome work. And

  The elevator final floor forced reduction device according to the present invention detects the state where the car is traveling at a speed exceeding the speed limit near the final floor of the hoistway, and forcibly decelerates the passenger car. In the forced deceleration device, in accordance with the setting of the inspection mode, inspection operation means for inspecting the car in the direction of the terminal floor at a constant speed at a low speed equal to or lower than the rated speed, and the inspection operation means. At least one position detection means for detecting that the car has passed a predetermined position near the terminal floor, and speed detection for detecting speed data when the position detection means detects the passing of the car. And the vehicle speed data detected by the speed detection means are compared with preset speed limit data for inspection operation to stop the car. , Characterized by comprising a thing as determining operation determining means it is operating normally when the can stop the predetermined position.

  According to the present invention, it is possible to easily and safely confirm the operation state without requiring troublesome work.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing an overall configuration of an elevator to which a terminal floor forced reduction device according to an embodiment of the present invention is applied. Reference numeral 10 in the figure denotes an elevator hoistway, which is constructed in a building. Further, 10a, 10b, 10c... Are landings on each floor.

  As shown in FIG. 1, a shock absorber 11 is installed at the lowermost end of the pit portion of the hoistway 10. The shock absorber 11 is provided to alleviate a collision with the pit portion when the elevator car 13 cannot be stopped at the lowest floor 10a due to some abnormality and passes in the descending direction as it is.

  A plurality of limit switches 12 a, 12 b, 12 c are arranged in the vicinity of the terminal floor (here, the lowest floor) of the hoistway 10 along the traveling direction of the car 13. These limit switches 12a, 12b, and 12c are switches for detecting a passing position in the lowering direction of the car 13 on the lowest floor, and are composed of, for example, microswitches, and are attached to the sides of the car 13 respectively. The ON operation is performed by the contact of the receiving plate 13a, and the signal is output to the terminal floor forced reduction device 23.

  The car 13 moves in the hoistway 10 at a predetermined speed via the main rope 14 by driving the hoisting machine 15. The hoisting machine 15 is installed at the machine room at the top of the building or at the top of the hoistway 10 and is driven and controlled by the control of the main controller 21. The hoisting machine 15 is provided with an electromagnetic brake 16 and a pulse generator 17. The electromagnetic brake 16 is provided on the circumferential portion of the motor of the hoisting machine 15, and abuts on the motor to apply the brake when the elevator stops. The pulse generator 17 is attached to a rotating shaft or the like of the hoisting machine 15 and generates a pulse signal in synchronization with the rotation of the hoisting machine 15.

  Although omitted in FIG. 1, a plurality of similar limit switches are also provided near the top floor of the hoistway 10, and the car 13 is forcibly decelerated based on these switch operations.

  In the following, description will be made assuming that the car 13 is forcibly decelerated at the lowermost end using limit switches 12a, 12b, and 12c installed near the lowermost end of the hoistway 10.

  As devices related to elevator operation control, a main control device 21, an operation cutoff circuit 22, and a terminal floor forced reduction device 23 are provided in a machine room or the like.

  The main control device 21 is composed of a computer equipped with a CPU, ROM, RAM, and the like, and executes various processes necessary for elevator operation control. The main controller 21 is connected to an external monitoring center 32 via a communication network 31 such as a public line network. The monitoring center 32 constantly monitors the operation state of the elevator via the communication network 31, and when any abnormality is detected, a maintenance staff is dispatched to the site to cope with it.

  The driving shut-off circuit 22 shuts off the hoisting machine 15 and the electromagnetic brake 16 circuit according to a command from the main control device 21 when the car 13 is stopped at each floor.

  The terminal floor forced reduction device 23 forcibly decelerates the car 13 at the terminal floor (here, the lowermost end) of the hoistway 10. This terminal floor forced deceleration device 23 is configured by a computer. The terminal floor forced deceleration device 23 includes a control unit 24, a speed detection unit 25, a mode changeover switch 26, a recording unit 27, a first memory unit 28, a second memory unit 29, and a data selection unit 30. Yes.

  The control unit 24 corresponds to a CPU, detects an abnormal speed of the car 13 at the terminal floor, and performs deceleration control of the car 13 via the operation cutoff circuit 22. The speed detector 25 converts the pulse signal from the pulse generator 17 into a speed signal of the car 13 and gives it to the controller 24.

  The mode switch 26 is an operation switch for switching between the normal mode and the inspection mode, and is attached at a position where maintenance personnel can easily operate. The recording unit 27 records the inspection result of the terminal floor forced reduction device 23.

  The memory units 28 and 29 each store speed limit data necessary for forced deceleration, the first memory unit 28 has speed limit data used in normal operation, and the second memory unit 29 has an inspection. Speed limit data used for driving is stored. The data selection unit 30 selects the speed limit data of the first memory unit 28 or the second memory unit 29.

  FIG. 2 is a diagram showing a speed pattern at the time of landing on the elevator in the embodiment, where the horizontal axis represents the distance to the landing position, and the vertical axis represents the traveling speed.

  P1 in the figure indicates a normal speed pattern when landing on the lowest floor during normal operation, and P2 indicates a speed pattern based on speed limit data used during the normal operation. On the other hand, P3 is a speed pattern in the inspection operation, and at the time of the inspection operation, the speed is a low speed that stops immediately below the rated speed and a constant speed. P4 indicates a speed pattern based on speed limit data used during the inspection operation.

  Further, x1, x2, and x3 are speed check points by the terminal floor forced deceleration device 23, and correspond to positions where the car 13 has passed each of the limit switches 12a, 12b, and 12c shown in FIG.

  As will be described later, in the normal mode, when the speed pattern P1 of the car 13 exceeds the speed limit pattern P2 at each point x1, x2, x3, an abnormality is detected, and the elevator operation cutoff circuit 22 is opened. Operation is stopped. In the figure, v1, v2, and v3 are values of the speed pattern P1 corresponding to the points x1, x2, and x3, and d1, d2, and d3 are values of the speed limit pattern P2 corresponding to the points x1, x2, and x3.

  On the other hand, in the inspection mode, when the speed pattern P3 of the car 13 exceeds the speed limit pattern P4 at each point x1, x2, x3, it is detected as an abnormality, and the elevator operation cutoff circuit 22 opens to stop the operation. Is done. In the figure, v1 ', v2', v3 'are values of the speed pattern P3 corresponding to each point x1, x2, x3, and d1', d2 ', d3' are speed limit patterns corresponding to each point x1, x2, x3. This is the value of P4.

  In such a configuration, it is assumed that the car 13 is currently moving toward the lowest floor in the normal mode. When the limit switch 12a is turned on due to the passing of the car 13, the control unit 24 provided in the terminal floor forced deceleration device 23 receives the first speed limit data (d1) corresponding to the position of the limit switch 12a through the data selection unit 30. Read from the memory unit 28. The terminal floor forced reduction device 23 receives the speed data (v1) of the car 13 from the speed detection unit 25 and compares it with the speed limit data (d1).

  In this case, if there is no abnormality in the main control device 21 and the car 13 is traveling normally, the speed data (v1) of the car 13 at the time point x1 is smaller than the speed limit data (d1). Therefore, the terminal floor forced deceleration device 23 does not do anything in particular and continues the operation of the car 13.

  Further, when the limit switches 12b and 12c are sequentially turned ON as the car 13 moves to the lowest floor, the terminal floor forced deceleration device 23 performs the limit switches 12b and 12c from the first memory unit 28 in the same manner as described above. The speed limit data (d2, d3) corresponding to each position (x2, x3) is read out and compared with the speed data (v1, v2) of the car 13 at that time. As a result, when the speed data (v1, v2) of the car 13 exceeds the speed limit data (d2, d3), the terminal floor forced reduction device 23 determines that the speed is abnormal, and the operation cutoff circuit The operation of the car 13 is controlled to stop through 22.

Next, the inspection operation of the terminal floor forced reduction device 23 will be described.
FIG. 3 is a flowchart showing the operation of the inspection process of the terminal floor forced deceleration device 23 in the same embodiment. In addition, the process shown by this flowchart is performed when the terminal floor forced deceleration device 23 which is a computer reads a predetermined program.

  When the maintenance staff operates the operation switch 9e provided in the terminal floor forced deceleration device 23, the control unit 24 recognizes the operation signal, switches to the inspection mode (step S11), and sets the reading destination of the speed limit data to the first. The first memory unit 28 is switched to the second memory unit 29 (step S12).

  Similar to the first memory unit 28, the second memory unit 29 stores speed limit data corresponding to the positions of the limit switches 12a, 12b, and 12c. However, as shown in FIG. 2, the speed limit data (P4) of the second memory unit 29 is set to be considerably lower than the speed limit data (P2) of the first memory unit 28.

  In this state, the car 13 is inspected and operated in a downward direction at a predetermined speed (P3) (step S13), and the signals of the limit switches 12a, 12b, and 12c are sequentially given to the terminal floor forced reduction device 23 (step S14). .

  When the control unit 24 inputs an ON signal of the limit switch 12a as the car 13 is lowered (Yes in step S14), the speed limit data (d1 ′) corresponding to the position of the limit switch 12a is obtained through the data selection unit 30. 2 (step S15), and the speed data (v1 ′) of the car 13 is input from the speed detector 25 (step S16).

  Here, the speed limit data of the second memory unit 29 is set in advance to a value smaller than the speed during the inspection operation (that is, data that exceeds the speed limit at the inspection operation speed). Therefore, if the terminal floor forced deceleration device 23 is operating normally, it is determined that the speed is abnormal by comparing the speed data (v1 ′) and the speed limit data (d1 ′), and the car is passed through the operation cutoff circuit 22. 13 is stopped (step S17). That is, if the car 13 stops immediately at the position of the limit switch 12a, it can be determined that the terminal floor forced reduction device 23 is operating normally (step S18), and the determination result is recorded in the recording unit 27. (Step S19).

  In the main controller 21, when the operation of the car 13 is stopped by the operation cut-off circuit 22, the position of the car 13 at that time is compared with a predetermined position of the limit switch 12a, and the error is detected. If the value is within a certain range in consideration of brake slip or the like due to operation stop, it can be recognized that the terminal floor forced reduction device 23 is normal, and the subsequent inspection operation can be continued.

  On the other hand, if the error value is out of a certain range, it is caused by abnormal operation of the pulse generator 17, the speed detector 25, the limit switch 12a, etc., and the subsequent inspection operation is suspended.

  In this way, after confirming the operation by the mitt switch 12a, the car 13 is lowered again from that position, and the operation state with respect to the limit switches 12b and 12c is similarly confirmed. In this case, if the terminal floor forced reduction device 23 is operating normally, the car 13 stops at each position of the limit switches 12b and 12c, and the determination result at that time is recorded in the recording unit 27. Is done.

  Note that the speed data (P3) of the inspection operation is set to be extremely low in consideration of the case where the car 13 cannot be stopped due to an abnormality in the terminal floor forced deceleration device 23 or the like. Specifically, the speed is very slow so that the shock absorber 11 provided in the pit portion of the hoistway 10 can reliably absorb and stop the impact.

  As described above, according to the present embodiment, it is not necessary to perform troublesome work such as changing the installation positions of the limit switches 12a, 12b, and 12c, and the operation of the terminal floor forced reduction device 23 can be easily confirmed by inspection operation. Can do. Further, in this inspection operation, the car 13 is not driven excessively fast, but the car 13 is stopped at each position of the limit switches 12a, 12b, and 12c while operating slower than the actual speed. The risk of runaway is extremely low and operation can be confirmed safely.

  In the above embodiment, the case where the operation state of the terminal floor forced reduction device 23 at the lowermost end of the hoistway 10 is inspected has been described. However, the uppermost floor can be inspected by the same method.

  Further, in the configuration of FIG. 1, the main control device 21 and the terminal floor forced reduction device 23 are provided separately, but the main control device 21 may be integrated with the function of the terminal floor forced reduction device 23. .

  In addition, although the mode is switched to the inspection mode by operating the mode changeover switch 26, the mode may be switched to the inspection mode by remote operation from the monitoring center 32. In this way, it is possible to select a safe time zone and check the operation more efficiently without the need for manpower.

  Further, the determination result data recorded in the recording unit 27 may be transferred from the main control device 21 to the monitoring center 32. The main control device 21 has a function for data communication with the monitoring center 32.

  Further, in the inspection mode, a pseudo speed excess state may be generated by multiplying the value of the speed data of the car 13 given to the terminal floor forced reduction device 23 by two.

  In short, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. Moreover, various forms can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be omitted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

FIG. 1 is a diagram showing an overall configuration of an elevator to which a terminal floor forced reduction device according to an embodiment of the present invention is applied. FIG. 2 is a view showing a speed pattern at the time of landing on the elevator in the same embodiment. FIG. 3 is a flowchart showing the operation of the inspection process of the terminal floor forced reduction device in the same embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Hoistway, 10a, 10b, 10c ... Platform of each floor, 11 ... Shock absorber, 12a, 12b, 12c ... Limit switch, 13 ... Riding car, 13a ... Test plate, 14 ... Main rope, 15 ... Hoisting machine , 16 ... Electromagnetic brake, 17 ... Pulse generator, 21 ... Main control device, 22 ... Operation shut-off circuit, 23 ... Termination forced deceleration device, 24 ... Control unit, 25 ... Speed detection unit, 26 ... Mode changeover switch, 27 ... Recording unit, 28 ... first memory unit, 29 ... second memory unit, 30 ... data selection unit, P1 ... speed pattern during normal operation, P2 ... speed pattern based on speed limit data during normal operation, P3 ... Speed pattern during inspection operation, P4: Speed pattern based on speed limit data during inspection operation, x1, x2, x3: Speed check point.

Claims (6)

In an elevator terminal floor decelerating device for detecting the state where the car is traveling at a speed exceeding the speed limit near the terminal floor of the hoistway and forcibly decelerating the car,
In accordance with the setting of the inspection mode, an inspection operation means for inspecting and driving the car in the direction of the terminal floor at a low speed below the rated speed and at a constant speed;
At least one position detection means for detecting that the car has passed a predetermined position near the terminal floor by the inspection operation means;
Speed detecting means for detecting speed data when the passing of the car is detected by the position detecting means;
If the speed of the car detected by the speed detecting means is compared with preset speed limit data for inspection operation, the car is stopped and controlled normally when the car can be stopped at the predetermined position. And an operation determination means for determining that the vehicle is operating at the end of the elevator. Memory means for storing first speed limit data used during normal operation and second speed limit data set lower than the first speed limit;
Data selection means for selecting the second speed limit data from the memory means when the inspection mode is set,
The elevator final floor forced deceleration device according to claim 1, wherein the operation determination means uses the second speed limit data selected by the data selection means as speed limit data for inspection operation.   3. The elevator final floor forced deceleration device according to claim 1, wherein the inspection mode is set by a switch operation. A monitoring center that remotely monitors the operating state of the elevator via a communication network,
3. The elevator final floor forced deceleration device according to claim 1, wherein the inspection mode is set by a remote operation from the monitoring center.   5. The elevator final floor forced deceleration device according to claim 4, further comprising a communication unit that transfers a determination result obtained by the operation determination unit to the monitoring center.   2. The elevator according to claim 1, wherein the speed at the time of the inspection operation is set to a very slow speed that can be accommodated even if the car passes without being stopped at the predetermined position. Terminal floor forced reduction device.

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