JP6646117B1 - Elevator control device - Google Patents

Abstract

Provided is an elevator control device that quickly specifies the nearest floor, regardless of the stop position of a car, when the position of the car shifts due to a rope slip. According to one embodiment, an elevator control device includes a car position detecting unit, a car misalignment determining unit, an operation control unit, a door open detecting unit, and a stop floor specifying unit. The car position detector detects the position of the car based on a pulse signal output in synchronization with the rotation of the hoist. The car misalignment determination section determines whether or not a car misalignment has occurred between the car position detected by the car position detection section and a position that should exist in control. When there is a displacement, the operation control unit can execute the door opening operation by moving the car to the nearest floor. The door opening detection unit detects a door opening operation for each landing door. The stop floor specifying unit specifies the floor position of the nearest floor based on the detection result of the door opening detection unit when the car is landed on the nearest floor by the operation control unit and the door opening operation is performed. . [Selection diagram] FIG.

Description

  Embodiments of the present invention relate to an elevator control device.

  2. Description of the Related Art Conventionally, there is an elevator operated in a range where a rated speed is low. In order to simplify the system, such an elevator uses, for example, a motor control encoder attached to a motor shaft of a hoist that hoists a rope for moving the car to move the car. May be. In the case of this system, the position of the car can be estimated by counting the number of pulses of the pulse signal output by the encoder in synchronization with the rotation of the hoist. In the case of this method, for example, when the car suddenly stops due to a power failure or the like, the rope slips on the sheave of the hoisting machine due to the inertia of the car and the counterweight that engages with the rope across the hoisting machine. In some cases. In this case, the car moves without the pulse number of the pulse signal of the encoder being normally counted, and the position of the car recognized based on the pulse number may be shifted from the actual position. As described above, one of the methods considered as a countermeasure in the case where the position shift of the car occurs, the `` terminal floor correction '' which moves the car to the terminal floor at a low speed and performs position correction in a shorter time. Various techniques for restoring the displacement have been proposed. For example, a technique of reading a pattern of a plate provided for each floor of a hoistway and specifying a floor, or a technique of specifying the nearest floor at which the floor has landed by constantly counting the number of times of passage of a landing board has been proposed. ing.

JP 2012-126486 A JP 2017-57039 A

  However, when the position of the car shifts due to a sudden stop, the car may stop at the position on the plate provided for each floor of the hoistway, or the car may pass through the position of the landing plate It may stop. In such a case, in the related art, there is a case where the position of the floor closest to the position where the car is stopped cannot be specified, and there is a problem that the operation cannot be returned quickly. Therefore, when the position of the car is displaced from the normal position due to the slip of the rope, the nearest floor close to the stop position of the car can be quickly specified regardless of the stop position of the car. If the elevator control device can be provided, it is meaningful that the displacement of the car can be eliminated based on the position of the nearest floor and the operation can be promptly restarted.

The elevator control device according to the embodiment includes, for example, a car position detecting unit, a car misalignment determining unit, an operation control unit, a door open detecting unit, and a stop floor specifying unit. The car position detection unit measures the car position of the car that can move on multiple floors by the rope wound by the hoist, and measures the number of pulses of the pulse signal output in synchronization with the rotation of the hoist And detect continuously. The car misalignment determination section determines whether or not a car misalignment has occurred between the car position detected by the car position detection section and a position that should exist in control. The operation control unit can move the car to the nearest floor and execute the door opening operation when the car shift determination unit determines that there is a position shift. The door open detection unit is configured to open / close door switch opening / closing information that is branched and output for each floor from a door circuit that is connected to a door switch that detects a door opening operation provided at a landing door for each floor. To get . The stop floor specifying unit is configured to perform a door opening operation by the operation control unit when the car has landed on the nearest floor, based on the open / close switching state of the opening / closing information for each floor acquired by the door open detection unit. Identify the floor position of the nearest floor.

FIG. 1 is an exemplary schematic diagram showing a configuration of an elevator to which the elevator control device according to the embodiment can be applied. FIG. 2 is an exemplary schematic diagram of a landing detection sensor of the elevator control device according to the embodiment. FIG. 3 is an exemplary schematic diagram illustrating a configuration of a door switch that provides a door open detection signal to the elevator control device of the first embodiment and a serial communication path. FIG. 4 is an exemplary schematic diagram of a data format in serial communication that can be used in the elevator control device of the first embodiment. FIG. 5 is an illustrative diagram showing a state of a door circuit based on a state of a door switch on each floor in the elevator control device of the embodiment. FIG. 6 is an exemplary schematic diagram of a functional block diagram of the elevator control device according to the first embodiment. FIG. 7 is an exemplary schematic diagram of a hierarchical pulse table that can be used in the elevator control device of the embodiment. FIG. 8 is an exemplary schematic diagram illustrating a floor height of a building in which an elevator including the elevator control device according to the embodiment is installed. FIG. 9 is an exemplary flowchart showing the flow of the car position correcting process of the elevator control device of the first embodiment. FIG. 10 is an exemplary flowchart illustrating details of S108 and S110 in the flowchart of FIG. FIG. 11 is an exemplary schematic diagram illustrating a configuration of a door switch that provides a door open detection signal to the elevator control device according to the second embodiment and a parallel communication path. FIG. 12 is an exemplary schematic diagram of a functional block diagram of the elevator control device according to the second embodiment.

  Hereinafter, an elevator control device according to an embodiment will be described in detail with reference to the drawings. Components in this embodiment include those that can be replaced by those skilled in the art and that are easy or substantially the same, and the present invention is not limited by the following embodiments.

  FIG. 1 is an exemplary schematic diagram illustrating a configuration of an elevator 10 to which the elevator control device according to the embodiment can be applied. In the elevator 10, a car 14 moves up and down a hoistway 12 installed in a building (a building, an apartment, or the like), and moves between landings 16 provided on each floor. The elevator 10 is provided with a counterweight 18 for balancing weight with the car 14. The car 14 is guided by a car guide rail (not shown), and the counterweight 18 can be raised and lowered while being guided by the weight guide rail.

  The car 14 includes, for example, a plurality of car sheaves 20 on the ceiling upper surface of the car 14. A rope 24 having both ends fixed to fixing portions 22a and 22b provided at the top of the hoistway 12, for example, is installed on the car sheave 20. The rope 24 is, for example, installed on a traction sheave 28 fixed to a motor shaft 26 a of a hoist 26 fixed to a part of a wall surface of the hoistway 12, and further provided on an upper portion of the counterweight 18. It is installed on the weight sheave 30. Accordingly, the traction sheave 28 is rotated by the rotation of the motor shaft 26a of the hoist 26. As a result, the rope 24 wound around the traction sheave 28 moves, and the car 14 and the counterweight 18 move up and down in a smooth manner. In some cases, a machine room is provided at the top of the hoistway 12, and in this case, the hoist 26 is installed in the machine room.

  The motor shaft 26a of the hoist 26 includes an encoder 32, and outputs a pulse signal output in synchronization with the rotation of the motor shaft 26a (the hoist 26). The car position detection unit, which will be described later, continuously detects the number of pulses of the pulse signal output from the encoder 32, thereby continuously determining the driving state of the hoisting machine 26, that is, the movement amount of the rope 24, and thus the position of the car 14. Can be detected.

  The landing 16 on each floor of the hoistway 12 is provided with, for example, a rectangular landing opening 16a. When the car door 14a moves to each landing 16 and stops (landing), the car door 14a of the car 14 matches the position of each landing opening 16a. Each landing 16 is provided with a landing door 34 that can be opened and closed so as to close the landing opening 16a. The landing door 34 is normally in a closed state, and the operation of opening the door is regulated by a lock mechanism (not shown). Thereby, the landing door 34 normally blocks between the landing 16 side and the hoistway 12 side. The landing door 34 interlocks (follows) when the car 14 arrives at the destination floor and the car door 14a operates from the closed state to the open state by driving of a door motor (not shown), and locks by the lock mechanism. Upon release, the state changes from the closed state to the open state. Each landing door 34 is provided with a door switch 36 for detecting that the landing door 34 has opened. The door switch 36 may be, for example, a normally-closed switch that is turned off when the landing door 34 is opened. The details of the door switch 36 will be described later.

  A landing detection sensor 38 for detecting the landing position of the landing 16 on each floor is provided at the bottom of the car 14. In addition, on each floor, when the car 14 has landed, a position facing the landing detection sensor 38, that is, the wall surface of the hoistway 12, has a landing inspection plate 40 of a predetermined length (also referred to as a “landing detection plate”). ) Is provided. As an example, the landing detection sensor 38 is configured by arranging a plurality of (for example, three) limit switches 38sa, 38sc, and 38sb at predetermined intervals in the direction in which the car 14 moves up and down, as shown in FIG. I have. As the limit switches 38sa, 38sc, and 38sb, for example, a substantially C-shaped photoelectric sensor in which a light emitter and a light receiver are arranged to face each other can be used. The landing plate 40 is positioned with respect to the landing detection sensor 38 so that it can pass between the light emitter and the light receiver (a substantially C-shaped opposed inner portion). At regular times, light is transmitted and received between the light emitter and the light receiver (the opposing inner portions of the substantially C-shape). In this state, the outputs of the limit switches 38sa, 38sc, 38sb are OFF. On the other hand, as the car 14 moves up and down, the landing detection sensor 38 moves, and the landing detection plate 40 enters between the light emitter and the light receiver (the opposing inner part having a substantially C-shape) to block light. The outputs of the limit switches 38sa, 38sc, 38sb whose light is blocked are turned on. In the example shown in FIG. 2, when the car 14 is moving in the UP direction (upward), ON outputs are obtained in the order of the limit switches 38sa-38sc-38sb. When the car 14 is moving in the DN direction (downward), the ON output is obtained in the order of the limit switches 38sb-38sc-38sa. When all of the limit switches 38sa, 38sc, and 38sb are ON, it indicates that the car 14 is correctly landing at a predetermined landing position. In the safety standards, 10 mm before and after the limit switch 38sc is defined as the landing level.

  When the limit switch 38sa or the limit switch 38sb is ON (the limit switch 38sc is ON), it is assumed that the car 14 is in the vicinity of the landing 16 within a door open range. The range in which the door can be opened is referred to as a “door zone”, and is defined, for example, at 200 mm before and after the limit switch 38sc. The length of the landing plate 40 defines the range of the door zone. Note that 75 mm before and after the limit switch 38sc is a wire stretch zone, which allows a range of vertical swing of the car 14 when a user gets on and off the car. When the car 14 has passed or landed on each floor (the landing 16), a combination signal of ON / OFF of the limit switch 38sa, the limit switch 38sc, and the limit switch 38sb is used as a landing signal of the landing detection sensor 38, which will be described later. Is provided to the landing position detecting unit that performs the landing.

  In addition to the limit switches 38sa, 38sc, and 38sb of the landing detection sensor 38, as shown in FIG. 1, a position corresponding to the lowest floor of the hoistway 12 is located at the lowest floor for detecting the lowest floor. A floor limit switch 42 is provided, and a top floor limit switch 44 for detecting the top floor is provided at a position corresponding to the top floor. When the car 14 has landed on the lowermost floor, the lowermost floor limit switch 42 is turned ON, and the signal is provided to the landing position detector. Similarly, when the car 14 has landed on the top floor, the top floor limit switch 44 is turned ON, and the signal is provided to the landing position detection unit.

  The overall control of the elevator 10 is executed by an elevator control device 46 installed in a part of the wall surface of the hoistway 12, a three-way frame, or a machine room provided at the top of the hoistway 12. FIG. 1 shows an example in which the elevator control device 46 is provided on a part of the wall surface of the hoistway 12. The elevator control device 46 is also called a “control panel”. The elevator control device 46 includes, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory) that stores a predetermined control program and the like in advance, a RAM (Random Access Memory) that temporarily stores the calculation results of the CPU, and is prepared in advance. A microcomputer having a backup RAM for storing the obtained reference data and information such as the specifications of the elevator 10 and an input / output port device, a driving circuit, and the like are provided. The elevator control device 46 is electrically connected to various sensors, detectors, and each part of the elevator 10, and controls the operation of each part comprehensively. For example, the elevator control device 46 includes drive control of the hoisting machine 26 (operation control of the car 14), open / close control of the car door 14a, and a car registration device 14b provided in the car 14 and provided at each landing 16. The control based on the call registration for the operation of the landing registration device 16b is performed. Communication between the elevator control device 46 and each device is executed by wire or wirelessly. As will be described later, the elevator control device 46 according to the present embodiment has a function of correcting the position shift of the car 14 detected when the position of the car 14 is detected based on the count value of the pulse number of the pulse signal of the encoder 32. It has. Details of the elevator control device 46 will be described later.

  Although FIG. 1 shows the configuration of a so-called “2: 1 roping type elevator”, the present invention is not limited to this configuration, and the so-called “1: 1 roping type elevator” and elevators of other configurations are also described below. Is applicable, and the same effects can be obtained. In the following description, the embodiments will be described separately according to the difference in the method of transmitting and receiving signals to and from the elevator control device 46. First, a first embodiment describes a configuration using serial communication that is frequently used in recent elevators, and a second embodiment describes a configuration that uses parallel communication that is frequently used in older elevators. Note that the overall configuration of the elevator 10 and the configuration of the landing detection sensor 38 are the same as in the first and second embodiments, and a detailed description thereof will be omitted.

<First embodiment>
FIG. 3 is an exemplary schematic diagram showing a configuration of the door switch 36 that provides the door control signal to the elevator control device 46 of the first embodiment. The landing 16 on each floor of the elevator 10 is provided with a landing registration device 16b for receiving a user request for each floor. The hall registration device 16b is connected to the elevator control device 46 using a serial communication path 48. Further, in the case of the first embodiment, a door circuit 50 in which the door switches 36 provided on the landing doors 34 of each landing 16 and detecting the opening operation of the landing doors 34 are connected in series is formed. Further, the door circuit 50 branched at each landing 16 is connected to the landing registration device 16b. Then, each hall registration device 16b transmits a signal (for example, “ON” or “H”, “OFF” or “L”) of the door circuit 50 of each hall 16 together with the state of the hall call button 16c to the serial communication path 48. , And can be transmitted to the elevator control device 46. FIG. 4 is an example of a data format DF transmitted using the serial communication path 48. The data format DF is configured to include, for example, address information A, call information B, door circuit information C, and the like. The address information A is information allocated to each floor in order to specify the landing 16 (floor). The call information B is information for notifying the elevator control device 46 of the state of the hall call button 16c (an upper floor move call or a lower floor move call) in one address allocated to each floor. The door circuit information C is information for notifying the elevator control device 46 of the state (ON or OFF) of the door circuit 50 on the floor by using unused bits in one address allocated to each floor. is there. In FIG. 3, the hall registration device 16b on the lowest floor is provided with only a hall call button 16c indicating movement to the upper floor, and the hall registration device 16b on the top floor is provided only with a hall call button 16c indicating movement on the lower floor. ing.

  FIG. 5 is an illustrative diagram showing a state of the door circuit 50 based on a state of the door switch 36 of each landing 16. For example, consider a case where the elevator 10 is installed in a 10-story building. For example, when the landing door 34 on the fifth floor is opened, the door circuit 50 in the landing 16 on the fifth floor or lower is in the “OFF” state. Accordingly, the hall registration device 16b of the hall 16 on the fifth floor or lower transmits a signal indicating that the door circuit 50 is in the “OFF” state together with the state of the hall call button 16c in the data format DF shown in FIG. Conversely, the hall registration device 16b of the hall 16 on the sixth floor or higher transmits a signal indicating that the door circuit 50 is in the “ON” state together with the state of the hall call button 16c in the data format DF.

  FIG. 6 is an exemplary schematic diagram of a functional block diagram of the elevator control device 46 according to the first embodiment. In the first embodiment, the CPU included in the elevator control device 46 reads out and executes a program stored in a storage device such as a ROM, thereby detecting the position shift of the car 14 and correcting the position shift when the position shift occurs. To realize the module. In another embodiment, each module may be configured by dedicated hardware.

  The elevator control device 46 includes a car position detecting unit 52, a landing position detecting unit 54, a car shift determining unit 56, a hierarchical pulse table 58, an operation control unit 60, a serial communication unit 62, a door open detecting unit 64, a stop floor specifying unit. 66, and a module such as a correction unit 68.

  The car position detecting unit 52 determines the position of the car 14 that can move on a plurality of floors by the rope 24 wound around the hoisting machine 26 by detecting the position of the pulse signal output in synchronization with the rotation of the hoisting machine 26. The number of pulses is measured and detected continuously. Specifically, the car position detector 52 counts the number of pulses of the pulse signal output from the encoder 32 in synchronization with the rotation of the motor shaft 26a of the hoist 26, and moves the car 14 based on the counted value. The position of the car inside is continuously detected.

  The landing position detection unit 54 is configured so that the landing detection sensor 38 shown in FIG. 2 is turned on / off by the landing plate 40 provided for each floor of each landing 16 as the car 14 moves. The landing position of the car 14 is detected based on the output landing signal. For example, when all of the limit switches 38sa, 38sc, and 38sb of the landing detection sensor 38 are ON, the landing position detection unit 54 correctly positions the car 14 at the predetermined landing position. Obtain the detection result indicating that

  The car misalignment determination unit 56 determines whether or not a misalignment has occurred between the car position of the car 14 detected by the car position detection unit 52 and a position that should exist in control. For example, the car misalignment determination unit 56 may be, for example, 50 mm or 100 mm between the car position of the car 14 detected by the car position detection unit 52 and the landing position of the car 14 detected by the landing position detection unit 54. , 200 mm, etc., it is determined that a position shift has occurred in the detection result of the car position detection unit 52.

  The hierarchical pulse table 58 stores a normal car position stored in advance in a storage unit such as a ROM when the car 14 has landed on the floor of each landing 16 in a state where the car 14 has not been displaced. It is the table formed using. FIG. 7 is an example of the hierarchical pulse table 58, which shows the number of pulses output by the encoder 32 when the car 14 moves to each floor (land 16) with reference to the first floor (1F). . As described above, the hierarchical pulse table 58 indicates the number of pulses measured when the car 14 has not been displaced. In order to simplify the description, one pulse indicated by the hierarchical pulse table 58 is equivalent to 1 mm. Therefore, it can be said that the hierarchical pulse table 58 stores the previously measured floor height between each floor. For example, as shown in FIG. 8, the height between the first and second floors is 5000 (mm), and the height between the second and third floors is 3000 (mm). At the time of setting the PD (pulse data), the number of pulses of the pulse signal output from the encoder 32 when the car 14 is operated in the UP direction from the lowest floor (first floor) is sequentially counted. As a result, the car position of the car 14 such as "000000" on the first floor, "0050000" on the second floor, "008000" on the third floor, and the like is obtained. The hierarchical pulse table 58 is formed by associating these car positions with the floor of each landing 16. If the car 14 has not been displaced, the car position detected by the car position detection unit 52 when the car 14 has landed on the floor of each landing 16 is stored in the hierarchical pulse table 58. It will be the same as the pulse number of each floor that has been set. Conversely, when the car 14 is displaced, the car position detected by the car position detector 52 when the car 14 has landed on the floor of each platform 16 is determined by the hierarchical pulse table. It does not match the pulse number of each floor stored in 58. That is, the car shift determining unit 56 can determine that the car 14 is out of position. Note that the correction unit 68 may directly read the normal car position (normal pulse number) from the ROM. In this case, the hierarchical pulse table 58 can be omitted.

  In another embodiment, when the car 14 is suddenly stopped, the car shift determining unit 56 may determine that the detection result of the car position detecting unit 52 has a position shift. As described above, when the car 14 (the hoisting machine 26) is suddenly stopped due to a power failure or other causes, for example, a defect (damage of parts, abnormality of a sensor, or the like) that affects the operation of the car 14, Due to the inertia of the car 14 and the counterweight 18, the rope 24 may slide on the traction sheave 28. In this case, no pulse signal is output from the encoder 32 despite the fact that the car 14 is moving, and the detection result of the car position detection unit 52 indicates the actual car position of the car 14, that is, in the hierarchical pulse table 58. The number of pulses shown may be different. In such a case, the car shift determining unit 56 determines that the position shift of the car 14 has occurred.

  The operation control unit 60 moves the car 14 at a predetermined speed to the car position of the car 14 detected by the car position detection unit 52 and the destination floor registered by the in-car registration device 14b or the hall registration device 16b. Speed control to be performed. After that, the operation control unit 60 executes position control for landing the car 14 on the destination floor. Further, it is assumed that the operation control unit 60 determines that the car shift determination unit 56 has determined that the car 14 has a position shift. For example, this is the case where the car position detected by the car position detection unit 52 has shifted (when the pulse count value of the car position detection unit 52 does not correctly indicate the current car position). In this case, the operation control unit 60 moves the car 14 toward the nearest floor from the current position. When the operation control unit 60 causes the car 14 to land at a correct position while referring to the detection result of the landing position detection unit 54, the operation control unit 60 interlocks (follows) the opening operation of the car door 14a and the opening operation of the car door 14a. The opening operation of the landing door 34 is performed. In this case, for example, the operation control unit 60 may prompt the user who is in the car 14 to temporarily retreat outside the car 14. For example, the operation control unit 60 displays a message such as "Please go down once to execute the car position correction work" on the display device or the like of the car registration device 14b, or outputs a voice message from a speaker or the like. You may make it output. Similarly, the operation control unit 60 causes the display device provided at the landing 16 to land on the nearest floor and prevent the user from entering the car 14 that has opened the car door 14a (the landing door 34). The message may be output using a speaker or a speaker.

  The serial communication unit 62 executes serial communication with the hall registration device 16b, acquires a signal of the door circuit 50 of each hall 16 and outputs the signal to the door open detection unit 64. The door opening detection section 64 detects the opening operation of the landing door 34 for each floor and generates information indicating the state of the door circuit 50 as shown in FIG.

  The stop floor specifying unit 66 detects the stoppage of the door open detection unit 64 when the operation control unit 60 causes the car 14 to land on the nearest floor and the opening operation of the car door 14a (the landing door 34) is performed. Based on the detection result, the nearest floor where the car 14 has landed, that is, the floor position where the landing door 34 is opened is specified. For example, as shown in FIG. 5, when the signal of the door circuit 50 on the fifth floor (5F) or lower is “OFF”, the landing door 34 on the fifth floor, which is the highest floor, is open, and the fifth floor is open. It can be specified that this is the nearest floor on which the car 14 has landed.

  The correcting unit 68 determines whether the car 14 has been displaced, that is, if the car 14 has landed on the nearest floor and the car door 14a (the landing door 34) has been opened, the stop floor is stopped. The car position of the car 14 detected by the car position detection unit 52 is adjusted to the landing floor position (regular car position) specified by the specifying unit 66. That is, the correction unit 68 reads out the car position (the number of pulses) of the specified landing floor (closest floor) from the hierarchical pulse table 58, and based on the car position (the number of pulses), the car position detection unit 52. The encoder 32 corrects the count value recognized by the encoder 32. For example, it is assumed that the nearest floor to which the car 14 specified by the stop floor specifying unit 66 has moved is “fifth floor”. Then, at this time, it is assumed that the car position (the number of pulses) detected by the car position detection unit 52 is “015000”. On the other hand, referring to the hierarchical pulse table 58 shown in FIG. 7, the normal car position (the number of pulses) corresponding to the “fifth floor” specified as the nearest floor is “013000”. Therefore, the car position of the car 14 detected by the car position detection unit 52 and the normal car position are shifted by "2000" pulses. Therefore, the correction unit 68 corrects the count value (car position) of the encoder 32 recognized by the car position detection unit 52 from “015000” to “013000” which is the normal car position (normal count number). As described above, by using the regular car position (regular count number), the displacement of the car 14 can be easily and quickly eliminated.

  When the elevator 10 is stopped, for example, when the call registration is not performed by the car registration device 14b or the hall registration device 16b at night or the like, the door circuit 50 of each hall 16 is opened. (Door switch 36) is checked whether it is functioning normally. In other words, the door open detection unit 64 acquires a signal indicating the opening / closing operation of the landing doors 34 of all the landings 16 (floor) before the operation control unit 60 executes the door opening operation on the nearest floor. Then, the normality of the door circuit 50 (door switch 36) is confirmed. For example, when no call registration is performed, that is, when the landing doors 34 of any of the landings 16 (floors) are not opening, the door circuit states of each floor shown in FIG. 5 are all “ON”. Becomes At this time, if any of the door circuit states is “OFF”, it can be determined that the door circuit 50 (door switch 36) is not operating normally due to disconnection, poor contact, malfunction of the door switch 36, or the like. . In this case, the "OFF" signal of the door circuit 50 output by the opening operation of the landing door 34 on the nearest floor where the car 14 has landed and the "OFF" signal output by the abnormality of the door circuit 50 (door switch 36). Indistinguishable from signals. Therefore, when the door circuit 50 (door switch 36) is not functioning normally, the stop floor specifying unit 66 does not specify the nearest floor (car position) and the correcting unit 68 does not execute the correction of the car position. Is also good. In this case, the elevator control device 46 may notify a warning indicating that the door circuit 50 (the door switch 36) has a problem to, for example, a management center that monitors the operation of the elevator 10. .

  An example of the operation of the car 14 related to the displacement correction of the car 14 and the correction by the elevator control device 46 configured as described above will be described with reference to the flowcharts of FIGS. 9 and 10.

  The car shift determining unit 56 constantly determines whether or not the car 14 is displaced during normal operation of the elevator 10 (S100). As described above, it is assumed that the operation of the car 14 (drive of the hoisting machine 26) is suddenly stopped due to some abnormality. When the vehicle suddenly stops, the rope 24 wound around the traction sheave 28 of the hoisting machine 26 slips due to the reaction (for example, due to inertia of the car 14 or the like), and the car 14 moves by the amount of the slip. Move in the same direction as the direction. At this time, since a pulse signal is not output from the encoder 32 attached to the motor shaft 26a of the hoist 26, the car position detected by the car position detector 52 of the elevator controller 46 (obtained from the pulse count value). (Car position) and the actual car position. That is, when the car 14 (the hoisting machine 26) suddenly stops, the car shift determining unit 56 determines that the car 14 is out of position (Yes in S100). In another embodiment, the car misalignment determination unit 56 includes a car position (a car position based on a pulse signal) of the car 14 based on the detection result of the car position detection unit 52 and a ride detected by the landing position detection unit 54. If an error equal to or more than a predetermined value occurs between the car 14 and the landing position, it may be determined that the car 14 has shifted. In S100, when it is determined that the car 14 has not been displaced (No in S100), the flow is temporarily ended.

  When the car shift determining unit 56 determines that the car 14 has been displaced (Yes in S100), the operation control unit 60 moves the car 14 to the nearest floor (for example, the operation until the car 14 is determined to be misaligned). For example, the vehicle is driven at a lower speed than the normal operation (S102). The landing position detection unit 54 checks whether the car 14 has landed on the nearest floor (No in S104). Then, when it is confirmed that the car 14 has landed on the nearest floor (Yes in S104), the operation control unit 60 opens the door at the nearest floor where the car 14 has landed (S106). That is, the operation control unit 60 drives the door motor of the car 14 to open the car door 14a. As a result, the landing door 34 on the nearest floor that has landed opens in conjunction with the car door 14a.

  The stop floor specifying unit 66 confirms the normality of the door circuit 50 (door switch 36) in each landing door 34 based on the door open detection result provided from the door open detection unit 64, and then opens the door normally. If the operation has been confirmed (Yes in S108), the car 14 is currently stopped (landing) based on the information (see FIG. 5) indicating the state of the door circuit 50 generated by the landing door 34. The position (the position of the nearest floor) is specified (S110). For example, the landing 16 (floor) where the landing door 34 has opened is identified from the door opening / closing information for all floors. Thereafter, the stop floor specifying unit 66 provides the correction unit 68 with floor data indicating the specified floor. For example, when the door 14 is stopped and moved to the nearest floor after the displacement of the car 14 and the door is opened, as shown in FIG. 5, the signal of the door circuit 50 on the first floor (1F) to the fifth floor (5F) is obtained. It is assumed that "OFF" is detected. In this case, it can be estimated that the landing 16 (floor) where the car 14 is stopped, that is, the “nearest floor” is the fifth floor.

  Here, the processing of S108 and S110 will be described in detail with reference to the flowchart shown in FIG. As described above, the operation control unit 60 collects the door opening / closing information of all the landings 16 (floor) at the timing when the door opening detection unit 64 does not perform the call registration in the elevator 10 (S200). The door circuit 50 (door switch 36) manages the normality. Then, the driving control unit 60 determines that the door circuit state is “ON” in all the landings 16 (floor floors) despite opening the door on the nearest floor where the car 14 has landed (S202). Yes), it is determined that the door opening operation is abnormal (S204, S108). In this case, it is determined in S108 of the flow of FIG. 9 that the landing door 34 has not been normally opened (No in S108), and the flow of FIG. 9 is temporarily terminated. That is, the correction unit 68 does not execute the correction of the displacement of the car 14. On the other hand, when the door circuit state is not “ON” in all the landings 16 (floor floors) (No in S202), that is, when it is determined that the door circuit 50 (the door switch 36) is normal, the door circuit The top floor is detected in the landing 16 (floor) where 50 is "OFF" (S206). Then, the top floor where the door circuit 50 is "OFF" is specified as the stop floor of the car 14, that is, the "nearest floor" (S208, S110).

  Note that an example of a case where the opening operation of the landing door 34 is not normal includes a case where the landing registration device 16b in which “address setting” has not been completed is installed. In order to use the hall registration device 16b, an operation of registering an installation floor called an address set is required. For example, a hall registration device 16b (hall call button 16c) for registering a call from the hall 16 is made into a board and the same one is used in all the halls 16. Therefore, it is necessary to register which boarding place 16 is installed for each board, and this operation is referred to as an “address set”. Therefore, when the “address setting” is not completed, it cannot be specified which landing 16 of the landing door 34 is performing the opening operation. In this embodiment, also in this case, it is considered that the door is not “normal” in S108, and the nearest floor is not specified and the displacement of the car 14 is not corrected (prohibition condition).

  In the flow of FIG. 9, when the nearest floor to which the car 14 has moved can be specified, the correction unit 68 refers to the hierarchical pulse table 58, and the car position (regular car position) of the car 14 corresponding to the stop floor. Is acquired (S112). As shown in FIG. 7, the hierarchical pulse table 58 stores the car position (normal car position) of each landing 16 (floor) measured in advance with reference to the terminal floor (the first floor in this example) at the time of PD setting. The corresponding pulse number is stored. For example, when it is specified that the nearest floor to which the car 14 has moved is “fifth floor”, the correction unit 68 acquires the pulse number (013000) indicating the normal car position on the fifth floor.

  Then, the correction unit 68 corrects the displacement of the car 14 detected by the car position detection unit 52 based on the normal car position acquired with reference to the hierarchical pulse table 58 (S114). That is, the correction unit 68 acquires the number of pulses of the encoder 32 recognized by the car position detection unit 52 from the hierarchical pulse table 58 and resets the number of pulses indicating the normal car position (reset the car position). For example, when the car position (the number of pulses) detected by the car position detection unit 52 is “015000” while the car 14 is stopped at “fifth floor”, the hierarchical pulse table 58 (see FIG. 7) In this case, there is a displacement of 2000 pulses relative to the normal car position (013000) on the 5th floor. Therefore, the correction unit 68 corrects (resets) the car position (the number of pulses) recognized by the car position detection unit 52 from “015000” to “013000”.

  After the car position of the car 14 recognized by the car position detection unit 52 is reset, the operation control unit 60 returns the operation of the car 14 (the drive of the hoist 26) to the normal operation at the normal speed ( S116). In addition, when the position shift correction of the car 14 is completed and the normal operation is restarted, the elevator control device 46 may output a message of the operation return.

  Thus, according to the elevator control device 46 of the first embodiment, when the car 14 is displaced and the car 14 is landed on the nearest floor, the door circuit 50 of each landing 16 (floor) is used. By using this signal, the floor (closest floor) on which the car 14 has landed can be specified. Further, when the car 14 stops on the specified floor, the car position detection unit 52 recognizes the car 14 by using the data indicating the normal car position (the number of pulses indicated by the hierarchical pulse table 58). The car position (the number of pulses acquired from the encoder 32) can be corrected, and the car 14 can be quickly corrected for displacement. Particularly, in a building having a large number of floors, when the car 14 is moved to, for example, the terminal floor (the lowest floor or the top floor) to correct the displacement, the car 14 is prevented from overrunning at the terminal floor. In addition, since it moves at an extremely low speed, it takes time to move to the terminal floor. On the other hand, according to the elevator control device 46 of the first embodiment, the travel distance to the nearest floor is one floor at the maximum after the displacement has been discovered, and the time required for the travel is to the terminal floor. It is much shorter than it would be. Then, after the car 14 is moved in a short time, only the number of pulses of the car position detection unit 52 is corrected based on the regular car position (regular pulse number) based on the specified nearest floor, and the car 14 is misaligned. Correction can be completed. As a result, the processing time for the displacement correction of the car 14 can be shortened, and the normal operation of the elevator 10 can be quickly restarted.

<Embodiment 2>
In the first embodiment described above, the signal of the door circuit 50 at each landing 16 (floor) is notified to the elevator control device 46 using the serial communication path 48 via the landing registration device 16b. On the other hand, in the second embodiment, the signal of the door circuit 50 of each landing 16 (floor) is notified to the elevator control device 46 via the parallel communication path 70. The configuration of the second embodiment will be described with reference to FIGS. It should be noted that the first embodiment and the second embodiment differ only in the signal communication method of the door circuit 50, and other configurations are basically the same. For example, in FIG. 11, a parallel communication path 70 is provided instead of the serial communication path 48 in FIG. In FIG. 12, a door circuit signal acquisition unit 72 is provided instead of the serial communication unit 62 in FIG. Accordingly, in the second embodiment, members having substantially the same configuration and the same function as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

  FIG. 11 is an exemplary schematic diagram showing the configuration of the door switch 36 that provides the door control signal to the elevator control device 46 and the parallel communication path 70 in the second embodiment. FIG. 12 is an exemplary schematic diagram of a functional block diagram of the elevator control device 46 according to the second embodiment.

  In the second embodiment as well, as in the first embodiment, the landing door 34 opens and closes following the car door 14a when landing. The landing doors 34 of each landing 16 (floor floor) are provided with a door switch 36 for detecting a door opening operation for each landing door 34. Similarly to the door switch 36 of the first embodiment, the door switch 36 of the second embodiment may be a normally-closed switch that is turned off when the landing door 34 is opened. The second embodiment also forms a door circuit 50 in which door switches 36 provided on the landing doors 34 of each landing 16 and detecting the opening operation of the landing doors 34 are connected in series. Then, a signal (for example, “ON” or “H”, “OFF” or “L”) branched from the door circuit 50 of each landing 16 can be transmitted to the elevator control device 46 using the individual parallel communication path 70. It is configured as follows. As a result, information (door circuit signal) indicating the door circuit status of each landing 16 (floor) as shown in FIG. 5 is transmitted to the elevator control device 46. The transmitted door circuit signal is received (acquired) by the door circuit signal acquisition unit 72. Therefore, the door open detection unit 64 can generate information indicating the state of the door circuit 50 on each floor as shown in FIG. 5 as in the first embodiment. Although not shown in FIG. 11, a signal indicating call registration based on operation of the hall call button 16c of the hall registration device 16b of each hall 16 is provided to the elevator control device 46 via a separate communication path. Have been.

  Therefore, in the configuration of the second embodiment, similarly to the configuration of the first embodiment, when the displacement of the car 14 occurs, the car 14 is moved to the nearest floor, and the door opening operation is performed, thereby enabling the ride to be performed. The nearest floor where the car 14 has landed can be specified. Then, the car position (the number of pulses) of the car 14 recognized by the car position detection unit 52 can be corrected using the regular car position (the number of pulses) of the car 14 based on the specified nearest floor. As a result, also in the configuration of the second embodiment, similarly to the configuration of the first embodiment, it is possible to quickly correct the displacement of the car 14 and quickly return the elevator 10 to the normal operation.

  As described above, in the elevator 10 not having the serial communication path 48, similarly to the first embodiment, when the car 14 is displaced and the car 14 is landed on the nearest floor, each elevator 16 By using a signal from the (floor) door circuit 50, the floor (closest floor) on which the car 14 has landed can be specified. Further, when the car 14 stops on the specified floor, the car position detection unit 52 recognizes the car 14 by using the data indicating the normal car position (the number of pulses indicated by the hierarchical pulse table 58). The car position (the number of pulses acquired from the encoder 32) can be corrected, and the car 14 can be quickly corrected for displacement. The serial communication path 48 is often used, for example, in recent elevators 10. On the other hand, the parallel communication path 70 is often used in, for example, an old elevator 10. Therefore, it is possible to select whether to adopt the configuration of the first embodiment or operate the configuration of the second embodiment according to the communication type of the elevator 10. In particular, in the old elevator 10 in which the parallel communication path 70 is operated, when the car 14 is displaced, the car 14 is landed on the nearest floor, and the function for specifying the nearest floor, It is easy to upgrade to add a function of correcting the displacement of the car 14 based on the above, and it is possible to contribute to improving the usability of the elevator 10.

  Although some embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and equivalents thereof.

  DESCRIPTION OF SYMBOLS 10 ... elevator, 14 ... car, 14a ... car door, 16 ... landing, 24 ... rope, 26 ... hoisting machine, 26a ... motor shaft, 28 ... traction sheave, 32 ... encoder, 34 ... landing door, 36 ... door Switch, 38: landing detection sensor, 40: landing plate, 46: elevator control device, 48: serial communication path, 50: door circuit, 52: car position detection unit, 54: landing position detection unit, 56: car Misalignment determination unit, 58: hierarchical pulse table (storage unit), 60: operation control unit, 62: serial communication unit, 64: door open detection unit, 66: stop floor specifying unit, 68: correction unit, 70: parallel communication path , 72... Door circuit signal acquisition unit.

Claims (5)

The car position of a car capable of moving a plurality of floors by a rope wound on a hoist is continuously measured by measuring the number of pulses of a pulse signal output in synchronization with the rotation of the hoist. A car position detecting unit to detect, a car misalignment determining unit that determines whether a misalignment has occurred between the car position detected by the car position detecting unit and a position to be present in control, and the car misalignment determining unit. When it is determined that there is a displacement, an operation control unit that moves the car to the nearest floor and can execute a door opening operation, and detects a door opening operation provided at a landing door for each floor. A door circuit configured to obtain opening / closing information of the door switch that is branched and output for each floor from a door circuit in which door switches are connected in series; and the operation control unit moves the car to the nearest position. On the floor When the door opening operation and the floor has been performed, stop floors specific identifying the floor position of the nearest floor based on the opening and closing switching state of the opening and closing information of each of the floor the floor the door opening detecting unit acquires An elevator control device comprising:   A storage unit that stores a regular car position for each floor when the car arrives on the floor in a state where the displacement has not occurred, and the nearest floor identified by the stop floor identification unit. The elevator according to claim 1, further comprising: a correction unit that acquires the normal car position corresponding to the floor position of the car, and corrects the car position detected by the car position detection unit based on the normal car position. Control device.   The door open detection unit acquires a signal indicating the opening / closing operation of the landing door on all of the floors before the door opening operation on the nearest floor is performed, and the correction unit detects all the floors. The car position detected by the car position detection unit is corrected based on the floor position specified by the stop floor specification unit when a signal indicating the opening / closing operation of the landing door on the floor is normal. 3. The elevator control device according to claim 1.   The car shift determining unit according to any one of claims 1 to 3, wherein the car shift determining unit determines that a position shift has occurred in the detection result of the car position detecting unit when the car is suddenly stopped. Elevator control device.   Each floor includes a landing position detection unit that detects a landing position of the car when the car has landed, and the car misalignment determination unit is configured to detect the car position detected by the car position detection unit. 2. When an error equal to or more than a predetermined value occurs between a position and the landing position detected by the landing position detection unit, it is determined that a position shift has occurred in the detection result of the car position detection unit. The elevator control device according to any one of claims 1 to 3.

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