JP2007254037A - Operation control device for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the confinement of a passenger near a nearby story when a door switch is turned off by a certain cause during the operation of a car. <P>SOLUTION: When a door switch is turned off during control operation by the occurrence of an earthquake (step S1-S13), it is determined whether or not the car is in a door zone (door-openable range) of the nearby story (step S14). If the car is in the door zone, the door switch is ignored and the car is landed at the nearby story in this state and door-opening is performed (step S16). Thereby, the closing-in of the passenger near the nearby story is prevented. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an operation control apparatus for controlling the operation of an elevator, and more particularly to an operation control apparatus for an elevator having a door switch disconnecting operation function when an earthquake occurs.

  In recent years, elevators have become indispensable as a means of vertical transportation as the number of buildings rises. On the other hand, the problem of elevator safety in the event of an earthquake has been pointed out.

  Normally, when an earthquake occurs in an elevator, by detecting the shaking, switch from normal operation to control operation, move the car quickly to the nearest floor, open the door after landing and let the passengers get off Yes.

  On the other hand, the car door and the landing door are provided with door switches that are turned off when the door is opened by landing of the car. When this door switch is turned off during operation of the car, the operation of the elevator is urgently stopped for safety.

  However, the door switch described above generally has a structure that is mechanically turned on and off by opening and closing the door panel, and thus may be turned off when the door panel is greatly shaken by a large impact such as an earthquake.

  In particular, when the car has come close to the nearest floor due to the control operation at the time of the earthquake, if the earthquake with a large shaking occurs again, the car will collide with the landing door, and the door will be opened by the impact at that time. The switch often turns off. In such a case, even if the car is close to the nearest floor, the passengers will not be able to get out of the car due to the suspension of operation, and will be trapped.

  Therefore, the present invention provides an elevator operation control device that can prevent passengers from being trapped near the nearest floor even when the door switch is turned OFF for some reason during operation of the car. Objective.

  An elevator operation control device according to the present invention is provided on a door of a car and is turned off when the door is opened. The second door switch is provided on a door of the landing and is turned off when the door is opened. Range detecting means for detecting whether or not the car is within a predetermined range of the nearest floor when at least one of the first and second door switches is turned off during operation of the car; When the range detecting means detects that the car is within the predetermined range, operation control means is provided for landing the car on the nearest floor and opening the car. Composed.

  According to the present invention, even if the door switch is turned OFF for some reason during the operation of the car, it is possible to prevent passengers from being trapped near the nearest floor.

  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 according to an embodiment of the present invention.

  The building 11 is provided with an elevator hoistway 12, and one elevator 13 is installed there. The elevator 13 includes a passenger car 14, a counterweight 15, a rope 16, a hoisting machine 17, and the like.

  The car 14 carries a user and moves between the floors of the building 11, and the counterweight 15 has substantially the same weight as the car 14. The rope 16 is wound around a hoisting machine 17, and a car 14 is connected to one end thereof and a counterweight 15 is connected to the other end. Thus, as the hoisting machine 17 is driven, the car 14 moves in a slipping manner in the direction opposite to the counterweight 15 via the rope 16.

  The car 14 is provided with a car door 31 that engages with the landing door 41 and opens and closes when landing on each floor. In this case, there is a drive mechanism on the car door 31 side, and the landing door 41 is configured to open and close by engaging with the car door 31 when landing. The car door 31 and the landing door 41 are provided with door switches 32 and 42 that are mechanically turned off when the door is closed. Normally, the car 14 is operated only when the door switches 32 and 42 are ON, and when the door switches 32 and 42 are OFF, the operation of the car 14 is prohibited by assuming that the door is open. Is done.

  Also, a landing detection sensor 33 for detecting the landing level of the car 14 is provided at the bottom of the car 14. As shown in FIG. 2, the landing detection sensor 33 includes a plurality (three in this case) of limit switches 33a, 33b, and 33c. On the other hand, a landing plate 43 having a predetermined length is installed below the landing entrance on each floor in the hoistway 12.

  A state in which all of the limit switches 33a, 33b, 33c of the landing detection sensor 33 are in contact with the landing plate 43 and is ON corresponds to the landing position of the car 14. Further, when at least one of the limit switches 33a, 33b, 33c is in contact with the test plate 43, it is assumed that the car 14 is within a range that can be opened near the landing. This range where the door can be opened is called a “door zone”, and is set to about 10 cm before and after the landing position, for example. The length of the receiving plate 43 defines the range of the door zone.

  As shown in FIG. 1, the lowermost part (pit part) of the hoistway 12 outputs a signal to the control device 19 when a P wave (primary wave) of a predetermined value or more is detected, and sends it to the elevator 13. On the other hand, a P-wave detector 20 is installed for operating in the control operation mode.

  On the other hand, an S wave detector 21 is provided in the machine room 18 to output a signal to the control device 19 when an S wave (secondary wave) of a predetermined value or more is detected and forcibly stop the operation of the elevator 13. is set up.

  Various signals such as the limit switches 33a, 33b, 33, the door switches 32, 42, and the earthquake detectors 20, 21 described above are provided in the control unit provided in the machine room 18 at the top of the building via a transmission cable (not shown). 19 is transmitted. The control device 19 is also called a control panel and performs overall control related to the operation of the elevator 13 such as drive control of the hoisting machine 17.

  FIG. 3 is a block diagram showing a functional configuration of the control device 19.

  The control device 19 includes a door zone detector 51, a door opening / closing detector 52, an earthquake detector 53, and an operation controller 54.

  The door zone detection unit 51 determines whether or not the car 14 is in the door zone based on the signals (Z1, Z2, Z3) of the limit switches 33a, 33b, 33c constituting the landing detection sensor 33 shown in FIG. To detect. In this case, if at least one of the limit switches 33a, 33b, 33c is ON, it is determined that the car 14 is in the door zone, and a signal to that effect is output to the operation control unit 54.

  The door open / close detection unit 52 detects the open / closed state of the car door 31 based on the signal (D1) of the door switch 32 provided on the car door 31, and the signal of the door switch 42 provided on the landing door 41 on each floor. Based on (D2), the open / close state of the landing door 41 is detected, and the detection signal is output to the operation control unit 54.

  The earthquake detection unit 53 outputs a signal (Ep) output when a P wave of a predetermined level or higher is detected by the P wave detector 20 and an S wave of a predetermined level or higher is detected by the S wave detector 21. The occurrence of an earthquake is detected based on the signal (Es) output to, and the detection signal is output to the operation control unit 54.

  The operation control unit 54 controls the operation of the car 14 based on signals output from the detection units 51 to 53. The operation control of the car 14 includes a control operation for moving the car 14 to the nearest floor when an earthquake occurs.

  In such a configuration, normally, when the car 14 is moving, the car door 31 and the landing door 41 are closed, and the door switches 32 and 42 are turned on. Then, with the landing of the car 14, the car door 31 and the landing door 41 are opened in conjunction with each other. The door switches 32 and 42 are both turned OFF by the door opening operation when the car 14 is landing.

  However, if an earthquake occurs during the operation of the car 14, the door switches 32 and 42 may be turned off because the car door 31 and the landing door 41 are greatly shaken. In particular, when an earthquake occurs again during the control operation at the time of the earthquake, the car 14 approaching the nearest floor collides with the landing door 41, and at least one of the door switch 32 and the door switch 42 is caused by the impact. Is turned off and a so-called “confinement accident” occurs.

  Hereinafter, operation control for preventing a confinement accident due to such a malfunction of the door switch will be described in detail.

  FIG. 4 is a flowchart showing a flow of operation control when an earthquake occurs by the elevator control device according to the embodiment.

  Assume that an earthquake has occurred (step S11). When an earthquake occurs, P and S waves propagate. Here, since the propagation time of the S wave, which is the main shock, is slower than that of the P wave, a method of operating the elevator in the control operation mode when the P wave is detected is widely known.

  When the P wave is detected by the P wave detector 20, the detection signal (Ep) is output to the control device 19. In response to this, the control device 19 switches the operation mode of the elevator 13 to the control operation mode, and immediately controls the passenger car 14 to stop at the nearest floor and get off the passenger (step S12).

  When the S wave propagates following the P wave, this is detected by the S wave detector 21, and the detection signal (Es) is output to the control device 19. In this case, the S wave is more dangerous than the P wave, so it is dangerous to operate the elevator 13. Therefore, for example, even if the previously detected P wave is smaller than a predetermined value and the control operation mode is not activated, it is common to forcibly stop the elevator 13 when the S wave is detected.

  In the following, it is assumed that an occurrence of an earthquake is detected based on a P-wave detection signal (Ep) and the car 14 is moving to the nearest floor in the control operation mode.

  It is assumed that at least one of the door switches 32 and 42 is turned off for some reason such as when an earthquake occurs again when the car 14 is moving to the nearest floor. If the door switches 32 and 42 are not turned off during the operation of the car 14, the car 14 moves to the nearest floor as it is, where it is closed and the passengers get off.

  When at least one of the door switches 32 and 42 is turned OFF (Yes in Step S13), the control device 19 determines whether or not the car 14 is in the door zone on the nearest floor (Step S14).

  This is determined from the state of each signal (Z1, Z2, Z3) of the limit switches 33a, 33b, 33c constituting the landing detection sensor 33 shown in FIG. If any one of the three limit switches 33a, 33b, and 33c outputs an ON signal, it is determined that the car 14 is in the door zone on the nearest floor.

  In this case, if the car 14 is moving in the downward direction, the limit switch 33c → 33b → 33a is turned on in this order, so if at least the limit switch 33c outputs an ON signal, it is within the door zone. Judge. If the car 14 is moving in the upward direction, the opposite is true, and the limit switch 33a → 33b → 33c is turned on in this order. Therefore, if at least the limit switch 33a outputs an ON signal, Judged to be in the door zone.

  If the car 14 is in the door zone of the nearest floor (Yes in step S14), there is a slight difference from the landing position of the landing (a position where all of the limit switches 33a, 33b, 33c are turned on). Can be opened. Therefore, the control device 19 ignores the signal of the door switch that has been turned OFF during the operation, causes the car 14 to land on the nearest floor as it is, opens the door there, and causes the passenger to get off (step S16). . After landing of the car 14, the operation of the elevator 13 is stopped (step S17).

  On the other hand, if the car 14 is outside the door zone of the nearest floor (No in step S14), it is dangerous to continue to operate as it is, so the control device 19 immediately stops the operation of the car 14, The operation of the elevator 13 is suspended (step S15). In this case, since the car 14 stops between the floors, a maintenance worker needs to be rescued later.

  In this way, if at least one of the door switches 32 and 42 is turned OFF during the control operation, the car 14 is not completely stopped, but the car 14 is in the nearest door zone. If it is in the door zone, it will land and open the door. This prevents a confinement accident near the nearest floor and ensures passenger safety.

  In addition, the elevator maintenance management company can reduce the labor involved in rescue of maintenance personnel involved in this type of confinement accident and perform efficient recovery work against wide-area damage caused by the occurrence of an earthquake.

  In the above embodiment, it is assumed that the door switch is turned off during the control operation at the time of the earthquake. However, for example, even if the door switch is turned off for some reason during normal operation, Can prevent confinement accidents.

  Moreover, although the said embodiment demonstrated as an example the case where one elevator was installed in the building, this invention is not restricted to this, With respect to the building where several elevators are installed Is applicable. In this case, the same operation control as described above is performed for each elevator car (for each car).

  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 according to an embodiment of the present invention. FIG. 2 is a diagram showing a configuration of a landing detection sensor provided in the elevator car in the same embodiment. FIG. 3 is a block diagram illustrating a functional configuration of the elevator control device according to the embodiment. FIG. 4 is a flowchart showing a flow of operation control when an earthquake occurs by the elevator control device according to the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Building, 12 ... Hoistway, 13 ... Elevator, 14 ... Ride car, 15 ... Counterweight, 16 ... Rope, 17 ... Hoisting machine, 18 ... Machine room, 19 ... Control device, 20 ... P wave detector, DESCRIPTION OF SYMBOLS 21 ... S wave detector, 31 ... Car door, 32 ... Door switch, 33 ... Landing detection sensor, 33a-33c ... Limit switch, 41 ... Landing door, 42 ... Door switch, 43 ... Arrival plate, 51 ... Door zone Detection unit 52. Door opening / closing detection unit 53. Earthquake detection unit 54 Operation control unit 54.

Claims (4)

A first door switch which is provided at the door of the car and is turned off when the door is opened;
A second door switch provided at the landing door and turned off when the door is opened;
Range detecting means for detecting whether or not the car is within a predetermined range of the nearest floor when at least one of the first and second door switches is turned off during operation of the car; ,
Operation control means for landing the car on the nearest floor and opening the door when the car is detected to be within the predetermined range by the range detecting means. An elevator operation control device.   2. The elevator operation control device according to claim 1, wherein the predetermined range is determined to be a range in which the car can be opened near the landing.   2. The operation control unit according to claim 1, wherein when the range detection unit detects that the car is out of the predetermined range, the operation control unit immediately stops the operation of the car. Elevator operation control device. Equipped with earthquake detection means to detect the occurrence of earthquakes,
When the occurrence of an earthquake is detected by the earthquake detection means, the operation control means switches to a control operation that moves the car to the nearest floor in a low speed state below a predetermined level, and the first operation control is performed during the control operation. The elevator operation control device according to claim 1, further comprising controlling operation of the car when at least one of the second door switches is OFF.

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