Elevator device, and method for controlling elevator device

Abstract

Disclosed are an elevator device comprising a safety control device provided with a function for registering floor position data, and a method for controlling the elevator device. This elevator device comprises: a car; and a safety control device (100) that detects the position of the car and compares the detected position of the car with a floor position registered in advance, thereby executing a safety process. When the car is operated to reach the floor for which the floor position is registered and then stops in a door-open state at said floor, in cases in which the level difference between the floor surface of the car and the landing floor surface of the floor is within a permissible range, as measured by a measurement instrument, a floor position registration unit (112) registers the detected current position of the car in a floor position storage unit (104) as the floor position. In cases in which the level difference is outside the permissible range, the floor position registration unit (112) changes the current position on the basis of the level difference and registers the resulting floor position in the floor position storage unit.

Description

Elevator system and control method for elevator system

[0001] The present invention relates to an elevator system equipped with a safety control device and a method for controlling this elevator system.

[0002] Elevator systems are equipped with safety devices that bring the car to an emergency stop if an abnormality occurs in the car's operating status. Such safety devices are increasingly being computerized, with sensors detecting the car's position and speed and safety control devices determining whether there is an abnormality in the car based on the electrical signals from the sensors.

[0003] A known prior art technology relating to an electronic safety device is that described in Patent Document 1 (FIGS. 5 and 6). In this technology, the safety control device has a terminal floor forced deceleration function and a door-open running protection function.

[0004] JP 2016-69093 A

[0005] The safety control device is equipped with sensors that detect the position and speed of the car, independent of the elevator control device that controls the operation of the car. For this reason, floor position data used in the terminal floor forced deceleration function and the door-open running protection function must be registered independently of the elevator control device. However, the safety control device of the above-mentioned conventional technology does not have the function to register floor position data.

[0006] Therefore, the present invention provides an elevator system including a safety control device having a function of registering floor position data, and a control method for this elevator system.

[0007] To solve the above problems, an elevator system according to the present invention includes a car, an elevator control device that controls car operation, and a safety control device that executes safety processing based on the car's position. The safety control device includes a position detection unit that detects the car's position, a floor position memory unit that stores floor positions to be compared with the car's position detected by the position detection unit when executing safety processing, and a floor position registration unit that registers the floor positions in the floor position memory unit. After the car is operated by the elevator control device to a floor whose floor position is registered, the floor position registration unit registers the current position of the car detected by the position detection unit as a floor position in the floor position memory unit when the car stops at the floor with the doors open, if the difference in level between the car's floor surface and the landing floor surface of the floor, as measured by a measuring device, is within an allowable range. If the difference in level is outside the allowable range, the floor position registration unit registers a floor position obtained by changing the current position based on the difference in level in the floor position memory unit.

[0008] In order to solve the above problems, the present invention provides a control method for an elevator system including a car and a safety control device that detects the car's position and performs safety processing by comparing the detected car position with a pre-registered floor position. In this control method, after the car is driven to a floor whose floor position is to be registered, when the car stops at the floor with the door open, if the difference in level between the car floor surface and the landing floor surface of the floor, as measured by a measuring device, is within an allowable range, the detected current position of the car is registered as the floor position, and if the difference in level is outside the allowable range, a floor position obtained by changing the current position based on the difference in level is registered.

[0009] According to the present invention, the safety control device can have a function of registering floor position data.

[0010] Problems, configurations, and effects other than those described above will become apparent from the following description of the embodiments.

[0011] Fig. 1 is an overall configuration diagram showing an elevator apparatus according to a first embodiment; Fig. 2 is a block diagram showing the functional configuration of a safety control device according to the first embodiment; Fig. 3 is a flowchart showing a floor position registration operation of the safety control device according to the first embodiment; Fig. 4 is a flowchart showing a step elimination operation of the elevator control device according to the first embodiment; Fig. 5 is a block diagram showing the functional configuration of a safety control device in an elevator apparatus according to a second embodiment; Fig. 6 is a flowchart showing a floor position registration operation of the safety control device according to the second embodiment;

[0012] An elevator system according to an embodiment of the present invention will be described below by way of example with reference to the drawings. In the drawings, the same reference numerals indicate the same components or components having similar functions.

[0013] FIG. 1 is a diagram showing the overall configuration of an elevator system according to a first embodiment of the present invention.

[0014] The car 2 is connected to a counterweight (not shown) within the hoistway 1 via a main rope 4. The main rope 4 is wound around a sheave provided in the hoisting machine 3. When a power converter provided in the elevator control device 90 supplies power to a motor provided in the hoisting machine 3, the sheave rotates due to the motor. When the main rope 4 is driven by the rotating sheave, the car 2 moves between multiple floors within the hoistway 1.

[0015] A rotary encoder is attached to the motor provided in the hoisting machine 3. The rotary encoder generates pulses in response to the rotation of the motor, and the elevator control device 90 counts these pulses. The elevator control device 90 calculates the movement amount and speed of the car 2 by counting the pulses. The car 2 is also provided with a position detection sensor (not shown). The position detection sensor detects a detection plate (not shown) provided at a specific position in the hoistway 1 (for example, a predetermined position near the floor position). The elevator control device 90 determines that the car 2 is located at the position where the detection plate is provided, based on the detection signal of the position detection sensor that detected the detection plate.

[0016] The elevator control device 90 controls the operation of the car 2 based on the movement amount and speed of the car 2 detected by the rotary encoder, and the position of the car 2 detected by the position detection sensor and the detection plate. For example, if the detection plate is provided at a predetermined position near the floor position, the elevator control device 90 moves the car 2 a predetermined distance from the point at which the detection plate is detected and stops it, thereby causing the car 2 to land at the floor.

[0017] The car 2 is provided with a car-side door 6. When the car 2 is located within a door zone, which is an area where the door can be opened, the car-side door 6 engages with a platform-side door 7 and is opened and closed together with the platform-side door 7 by a door drive device (not shown) provided in the car 2.

[0018] An endless governor rope 13 connected to the car 2 via a connecting member 15 is wound around a governor pulley 11 provided in the governor 10. The governor rope 13 is also wound around a tension pulley 12 provided in a pit at the bottom of the hoistway 1. The tension pulley 12 applies tension to the governor rope 13. As a result, the governor rope 13 is tensioned tightly in the hoistway 1 in the vertical direction from the lowest floor to the top floor.

[0019] In the first embodiment, the governor 10 has a known mechanism. Like known governors, the governor 10 operates when the car 2 falls into an overspeed state, and activates a safety device 50 provided at the bottom of the car 2.

[0020] The governor pulley 11 rotates following the movement of the car 2. The amount of rotation of the governor pulley 11 is detected by a position detector 20 provided in the governor 10. In the first embodiment, a rotary encoder is applied as the position detector 20.

[0021] The position detector 20 outputs a pulse signal in accordance with the movement of the car 2. The safety control device 100 calculates the amount of movement of the car 2 based on the pulse signal input from the position detector 20, and detects the position of the car 2 by integrating the calculated amount of movement. The safety control device 100 also detects the speed of the car 2 by calculating the change in the amount of movement of the car 2 over time.

[0022] The position detector may be provided in the car 2. In this case, the position detector is attached to a rotating roller that contacts the guide rail.

[0023] Other position detectors may be used instead of the rotary encoder as long as they can detect the amount of movement of the car 2. For example, an image sensor that captures an image of the surface of the guide rail may be installed in the car 2, and the amount of movement of the car 2 may be detected from changes in the captured image. Furthermore, the amount of movement of the car 2 may be detected by integrating twice the acceleration of the car 2 detected by an acceleration sensor installed in the car 2.

[0024] As described above, the safety control device 100 detects the position of the car 2 independently of the elevator control device 90 .

[0025] In the first embodiment, the safety control device 100 is installed on the car 2, but it may also be installed in the elevator shaft 1 together with the elevator control device 90.

[0026] The safety control device 100 determines whether the car 2 is located in the door-opening permission zone based on the position of the car 2 detected by the position detector 20. As described above, the door-opening permission zone is an area where the car-side door 6 and the hall-side door 7 can engage with each other and open and close together.

[0027] The safety control device 100 executes safety processing based on the determination result of whether the car 2 is located within the door-opening permission zone. In the first embodiment, the safety control device 100 brings the car 2 to an emergency stop when the car 2 is traveling outside the door-opening permission zone with either the car-side door 6 or the landing-side door 7 at each floor open, based on the determination result, a signal from the car door switch 61 that detects the opening and closing of the car-side door 6, and a signal from the landing door switch 71 that detects the opening and closing of the landing-side door 7. Furthermore, when the safety control device 100 detects that either door is open while the car 2 is traveling outside the door-opening permission zone, it brings the car 2 to an emergency stop. In other words, the safety control device 100 has a door-opening traveling protection function.

[0028] When emergency stopping the car 2 is performed, the safety control device 100 opens the contacts of the electromagnetic contactor to cut off the power supply from the building power source to the elevator control device 90. This stops the power supply from the power converter to the motor provided in the hoisting machine 3, and the brake device 30 is activated to brake the motor.

[0029] The floor position of each floor is registered in advance in the safety control device 100. The floor position is the height from a reference position in the hoistway 1 (in Example 1, the landing floor surface of the reference floor (lowest floor)) to a reference position of each floor (in Example 1, the landing floor surface of each floor). The position of the car 2 described above is the height from the reference position in the hoistway 1 (in Example 1, the landing floor surface of the reference floor (lowest floor)) to a reference position of the car 2 (in Example 1, the car floor surface).

[0030] The engagement portion between the car-side door 6 and the platform-side door 7 is located within a predetermined height range from the platform floor. Therefore, the safety control device 100 determines whether the car 2 is located within the door-opening permission zone by comparing the position of the car 2 detected by the position detector 20 with the pre-registered floor positions.

[0031] In order to register a floor position in the safety control device 100, first, the car 2 is moved to the target floor for which the floor position is to be registered by maintenance operation and stopped. Furthermore, the door of the car 2 is opened at the target floor. The safety control device 100 detects the position of the car 2 while the car 2 is moving. The safety control device 100 acquires the detected position of the car 2 at the time when the car 2 stops as the current position.

[0032] The maintenance engineer 8 measures the step between the floor surface of the car 2 stopped in the open door state and the landing floor surface of the target floor using a measuring instrument (such as a ruler) for measuring length or height. In Example 1, the position of the car 2 (i.e., the position of the car floor surface) is measured by h ｃ , the position of the landing floor is h ｆ Then, the step (d) is "h ｃ -h ｆ In the first embodiment, the maintenance engineer 8 performs the floor position registration work inside the elevator car 2.

[0033] If the measured step (d) is within an allowable range (for example, -5 mm≦d≦5 mm), the maintenance engineer 8 turns on a stop switch 81, which is one of the maintenance switches provided on a predetermined device, in this example, a maintenance control panel 80 provided inside the car 2. When the safety control device 100 determines that the stop switch 81 has been turned on, it registers the acquired current position of the car 2 as the floor position of the target floor in a memory unit provided in the safety control device 100.

[0034] If the measured step (d) is outside the allowable range (for example, d<-5 mm, 5 mm<d), the current position of the car acquired by the safety control device 100 is changed based on the measured step value by means described below. The maintenance engineer 8 turns on the stop switch 81. When the safety control device 100 determines that the stop switch 81 has been turned on, it registers the changed current position as the floor position of the target floor in a memory unit provided in the safety control device 100. Note that the maintenance engineer 8 may measure the step again before turning on the stop switch 81.

[0035] During maintenance operation and step measurement, the stop switch among the maintenance switches and the operation switch among the operation switches are turned on. This allows manual operation of the maintenance operating device or maintenance tool to issue a command to the elevator control device 90 to operate the hoisting machine and move the car 2. In contrast, when the stop switch 81 is turned on, the power supply to the hoisting machine 3 is cut off, so the hoisting machine 3 does not operate and the car 2 does not move. Therefore, when the stop switch 81 is turned on, the position of the car 2 detected by the safety control device 100 does not fluctuate. Therefore, by registering the current position of the car 2 held by the safety control device 100 at the time the stop switch 81 is turned on as the floor position, an accurate floor position can be registered.

[0036] FIG. 2 is a block diagram illustrating a functional configuration of the safety control device according to the first embodiment.

[0037] In the first embodiment, the safety control device 100 includes a computer system such as a microcomputer. The computer system executes a predetermined program to operate as each unit.

[0038] The safety control device 100 includes a position detection unit 101 that detects the position of the car 2 by calculating the position of the car 2 based on the position detection signal output by the position detector 20 .

[0039] The safety control device 100 is equipped with a door opening detection unit 102, a door opening permission zone determination unit 103, a floor position memory unit 104, an outside zone door opening detection unit 105, and a hoist power supply cut-off unit 106 to perform door open running protection based on the position of the elevator car 2 detected by the position detection unit 101.

[0040] The door open detection unit 102 determines the open / closed states of the multiple doors of the elevator apparatus based on signals from the door switches (car door switch 61, landing door switch 71).

[0041] The door-opening permission zone determination unit 103 compares the position of the car 2 detected by the position detection unit 101 with the floor position stored in the floor position memory unit to determine whether the car 2 is located within the door-opening permission zone.

[0042] When the door opening detection unit 102 determines that one of the doors is in an open state and the door opening permission zone determination unit 103 determines that the car 2 is not located within the door opening permission zone, i.e., is located outside the door opening permission zone, the outside zone door opening detection unit 105 determines that the car 2 is located outside the door opening permission zone with the door open.

[0043] When the outside-zone door open detection unit 105 determines that the car 2 is located outside the door open permitted zone with the door open, the hoist power supply cut-off unit 106 sends a command to cut off the building power supply, which reduces the power supply to the hoist 3.

[0044] In Example 1, when the door opening permission zone determination unit 103 determines that the car 2 is located outside the door opening permission zone while the car 2 is traveling, the elevator control device 90 controls the door drive device (not shown) to keep the car side door 6 closed.

[0045] The safety control device 100 includes a mode determination unit 110, a stop switch detection unit 111, and a floor position registration unit 112 in order to register the floor position of each floor in the floor position storage unit 104.

[0046] When the mode setting switch 82, which is one of the maintenance switches and sets the operation mode of the safety control device 100, is operated by the maintenance engineer 8, the mode determination unit 110 determines that the operation mode of the safety control device 100 has been set to the floor position setting mode. When the operation mode of the safety control device 100 is set to the floor position setting mode, the safety control device 100 becomes capable of performing the floor position registration operation.

[0047] The mode setting switch 82 may be provided in the safety control device 100 or in the maintenance operation panel 80 (FIG. 1).

[0048] As described above, when the step between the car floor surface and the landing floor surface, which is actually measured at the target floor for which the floor position is to be registered, is within the allowable range, the maintenance engineer 8 operates the stop switch 81 provided in the car. When the mode determination unit 110 determines that the operation mode of the safety control device 100 is the floor position setting mode and the door open detection unit 102 determines that the door is open, that is, when the maintenance engineer 8 is performing the floor position registration work, the stop switch detection unit 111 determines that the stop switch 81 has been operated, and the floor position registration unit 112 registers the position of the car 2, which the position detection unit 101 has calculated and stored based on the output signal of the position detector 20, in the floor position memory unit 104 as the floor position of the target floor.

[0049] If the step is outside the allowable range, the maintenance engineer 8 inputs the step value into a floor step amount input device 200 that is communicatively connected to the elevator control device 90. A maintenance tool made up of a personal computer, for example, is used as the floor step amount input device 200. The floor step amount input device 200 transmits the input step value to the elevator control device 90.

[0050] The elevator control device 90 performs a step-eliminating operation of the car 2 based on the step value received from the floor step amount input device 200. That is, the elevator control device 90 drives and controls the hoisting machine 3 to move the car 2 so that the step is within an allowable range, and then stops the car 2. At this time, the position detection unit 101 calculates and stores the position of the car 2 based on the output signal of the position detector 20. Once the car 2 has stopped, the maintenance technician 8 turns on the stop switch 81 provided in the car. As in the case where the step is within the allowable range described above, when the stop switch detection unit 111 determines that the stop switch 81 has been turned on, the floor position registration unit 112 registers the position of the car 2 stored by the position detection unit 101 in the floor position storage unit 104 as the floor position of the target floor.

[0051] In this way, the safety control device 100 according to the first embodiment has a function of registering floor position data.

[0052] 3 is a flowchart showing the floor position registration operation of the safety control device in the embodiment 1. The explanation will be made with reference to FIG. 2 as needed.

[0053] When the safety control device starts the floor location registration operation, the level difference is measured by a maintenance engineer. If the level difference is outside the allowable range, the elevator control device performs a level-eliminating operation of the car.

[0054] In step S301, the safety control device 100 determines whether the operation mode of the safety control device 100 is the floor position setting mode using the mode determination unit 110. If the safety control device 100 determines that the operation mode is the floor position setting mode (YES in step S301), it then executes step S302. If the safety control device 100 determines that the operation mode is not the floor position setting mode (NO in step S301), it ends the series of processes.

[0055] In step S302, the safety control device 100 determines whether the door-open state has been detected for a predetermined time (3 seconds in the first embodiment) using the door-open detection unit 102. If the safety control device 100 determines that the door-open state has been detected continuously for the predetermined time (YES in step S302), it then executes step S303. If the safety control device 100 determines that the door-open state has not been detected continuously for the predetermined time (NO in step S302), it ends the series of processes.

[0056] In step S303, the safety control device 100 determines whether or not a closing operation of the stop switch 81 in the car has been detected using the stop switch detection unit 111. If the safety control device 100 determines that a closing operation of the stop switch 81 has been detected (YES in step S303), the safety control device 100 then executes step S304. If the safety control device 100 determines that a closing operation of the stop switch 81 has not been detected (NO in step S303), the safety control device 100 ends the series of processes.

[0057] In step S304, the safety control device 100 registers the current car position held by the position detection unit 101 as a floor position in the floor position storage unit 104. After executing step S304, the safety control device 100 ends the series of processes.

[0058] 4 is a flowchart showing the step eliminating operation of the elevator control device in the embodiment 1. The explanation will be made with reference to FIG. 2 as needed.

[0059] In step S401, the elevator control device 90 determines whether a step amount has been input to the floor step amount input device 200. If the elevator control device 90 determines that a step amount has been input (YES in step S401), it then executes step S402. If the elevator control device 90 determines that a step amount has not been input (NO in step S401), it ends the series of processes.

[0060] In step S402, the elevator control device 90 calculates a target position to which the car 2 should be moved by the step-eliminating operation based on the current position of the car 2 held by the position detection unit 101 and the step amount. In Example 1, the target position is the position of the landing floor surface of the target floor. Furthermore, the elevator control device 90 controls the rotation drive of the hoisting machine 3 to start moving the car 2 toward the calculated target position. After executing step S302, the elevator control device 90 then executes step S403.

[0061] In step S403, the elevator control device 90 determines whether the difference between the current car position detected by the position detection unit 101 and the target position, i.e., the step amount in Example 1, is within the allowable range (in Example 1, the range is between −5 mm and +5 mm). If the elevator control device 90 determines that the difference is within the allowable range (YES in step S403), it then executes step S404. On the other hand, if the elevator control device 90 determines that the difference is outside the allowable range (NO in step S403), it then executes step S405.

[0062] In step S404, the elevator control device 90 stops the rotation of the hoist. After executing step S404, the elevator control device 90 ends the series of processes.

[0063] In step S405, the elevator control device 90 continues the rotation of the hoisting machine. That is, the elevator control device 90 continues the step-eliminating operation of the car 2. After executing step S405, the elevator control device 90 executes step S403 again.

[0064] When the above-described step-eliminating operation is completed, the position of the elevator car held by the position detection unit 101 is registered as a floor position.

[0065] As described above, according to the first embodiment, the safety control device 100 can have a function of registering floor positions. Furthermore, according to the first embodiment, the floor positions can be registered with an error equivalent to the allowable step amount. Therefore, the accuracy of the safety processing by the safety control device 100 is improved.

[0066] 5 is a block diagram showing the functional configuration of a safety control device in an elevator system according to a second embodiment of the present invention. The overall configuration of the elevator system is the same as that of the first embodiment (FIG. 1) described above.

[0067] The following mainly describes the differences from the first embodiment (FIG. 2).

[0068] 5 , in the second embodiment, the floor step amount input device 200 is communicably connected to the safety control device 100. The floor step amount input device 200 transmits the step value input by the maintenance engineer 8 to the safety control device 100.

[0069] The floor position registration unit 112 provided in the safety control device 100 calculates the floor position of the target floor based on the step value (outside the allowable range as in Example 1) received from the floor step amount input device 200 and the current position of the elevator car 2 held by the position detection unit 101.

[0070] As in the first embodiment, the position of the car 2 (i.e., the position of the car floor) is set to h ｃ , the floor position (i.e., the position of the landing floor) is hｆ Then, the step (d) is "h ｃ -h ｆ " Therefore, h ｆ =h ｃ Since the received value of the step is −d, the floor position registration unit 112 calculates the floor position by subtracting the received value of the step from the current position of the car 2 held by the position detection unit 101. The floor position registration unit 112 registers the calculated floor position in the floor position storage unit 104.

[0071] In Example 1, the position of the car 2 detected and held by the position detection unit 101 is changed to the floor position by moving the car 2 to the floor position (target position) by step elimination operation. In contrast, in Example 2, the position of the car 2 held by the position detection unit 101 is changed to the floor position by calculation in accordance with the step value received from the floor step amount input device 200 and held by the position detection unit 101, without moving the car 2. The calculated value of the floor position is not affected even if the car 2 moves, so the floor position is registered without operating the stop switch 81.

[0072] Fig. 6 is a flowchart showing the floor position registration operation of the safety control device in Example 2. The explanation will be made with reference to Fig. 5 as needed. Note that the step has been measured by a maintenance engineer at the time the safety control device starts the floor position registration operation. Furthermore, if the measured step is outside the allowable range, the maintenance engineer inputs the value of the step into the step amount input device.

[0073] In step S601, the safety control device 100 determines whether the operation mode of the safety control device 100 is the floor position setting mode using the mode determination unit 110. If the safety control device 100 determines that the operation mode is the floor position setting mode (YES in step S601), it then executes step S602. If the safety control device 100 determines that the operation mode is not the floor position setting mode (NO in step S601), it ends the series of processes.

[0074] In step S602, the safety control device 100 determines whether the door-open state has been detected for a predetermined time (3 seconds in the second embodiment) using the door-open detection unit 102. If the safety control device 100 determines that the door-open state has been detected continuously for the predetermined time (YES in step S602), it then executes step S603. If the safety control device 100 determines that the door-open state has not been detected continuously for the predetermined time (NO in step S602), it ends the series of processes.

[0075] In step S603, the safety control device 100 uses the floor position registration unit 112 to determine whether a step amount has been input to the floor step amount input device 200. If the safety control device 100 determines that a step amount has been input (YES in step S603), it then executes step S604. If the safety control device 100 determines that a step amount has not been input (NO in step S603), it then executes step S605.

[0076] In step S604, the safety control device 100 uses the floor position registration unit 112 to calculate the floor position of the target floor based on the step amount value and the current position of the car 2 held by the position detection unit 101. The safety control device 100 uses the floor position registration unit 112 to register the calculated floor position in the floor position storage unit 104. After executing step S604, the safety control device 100 ends the series of processes.

[0077] In step S605, the safety control device 100 determines whether or not a closing operation of the stop switch 81 in the car has been detected using the stop switch detection unit 111. If the safety control device 100 determines that a closing operation of the stop switch 81 has been detected (YES in step S605), the safety control device 100 then executes step S606. If the safety control device 100 determines that a closing operation of the stop switch 81 has not been detected (NO in step S605), the safety control device 100 ends the series of processes.

[0078] In step S606, the safety control device 100 registers the current car position held by the position detection unit 101 as a floor position in the floor position storage unit 104. After executing step S606, the safety control device 100 ends the series of processes.

[0079] As described above, according to the second embodiment, the safety control device 100 can have a function of registering floor positions. Furthermore, according to the second embodiment, the floor positions can be registered with an error equivalent to the allowable step amount. Therefore, the accuracy of the safety processing by the safety control device 100 is improved.

[0080] The present invention is not limited to the above-described embodiments and includes various modifications. For example, the above-described embodiments have been described in detail to clearly explain the present invention, and the present invention is not necessarily limited to those including all of the described configurations. Furthermore, it is possible to add, delete, or replace part of the configuration of the embodiments with other configurations.

[0081] For example, the elevator system may have a machine room, or may be a so-called machine room-less elevator that does not have a machine room.

[0082] REFERENCE SIGNS LIST 1...hoistway, 2...car, 3...hoisting machine, 4...main rope, 6...car side door, 7...landing side door, 8...maintenance technician, 10...governor, 11...governor pulley, 12...tension pulley, 13...governor rope, 15...connecting member, 20...position detector, 30...brake device, 50...emergency stop device, 61...car door switch, 71...landing door switch, 80...maintenance operation panel, 81 ...Stop switch, 82...Mode setting switch, 90...Elevator control device, 100...Safety control device, 101...Position detection unit, 102...Door opening detection unit, 103...Door opening permission zone determination unit, 104...Floor position memory unit, 105...Outside zone door opening detection unit, 106...Hoisting machine power supply cut-off unit, 110...Mode determination unit, 111...Stop switch detection unit, 112...Floor position registration unit, 200...Floor step amount input device

Claims

1. An elevator apparatus comprising a car, an elevator control device that controls the operation of the car, and a safety control device that executes safety processing based on the position of the car. The safety control device includes a position detection unit that detects the position of the car, a floor position storage unit that stores a floor position to be compared with the position of the car detected by the position detection unit when executing the safety processing, and a floor position registration unit that registers the floor position in the floor position storage unit. The floor position registration unit registers, as the floor position, the current position of the car detected by the position detection unit in the floor position storage unit when the car is stopped with the door open at the floor after being driven by the elevator control device to the floor where the floor position is to be registered, and the difference between the floor surface of the car and the landing floor surface of the floor measured by a measuring instrument is within an allowable range. When the difference is outside the allowable range, the floor position obtained by changing the current position based on the difference is registered in the floor position storage unit. The elevator apparatus is characterized by this.

2. The elevator apparatus according to claim 1, wherein when the difference is outside the allowable range, the current position is changed to the floor position by a difference elimination operation of the car by the elevator control device. The elevator apparatus is characterized by this.

3. The elevator apparatus according to claim 1, wherein when the difference is outside the allowable range, the current position is changed to the floor position by calculation by the safety control device. The elevator apparatus is characterized by this.

4. The elevator apparatus according to claim 1, wherein the floor position registration unit registers the current position as the floor position in the floor position storage unit in response to an operation of a maintenance switch when the difference is within the allowable range. The elevator apparatus is characterized by this.

5. The elevator apparatus according to claim 4, wherein the maintenance switch is a stop switch. The elevator apparatus is characterized by this.

6. The elevator apparatus according to claim 1, wherein the floor position registration unit executes registration of the floor position when the car is in a door-open state. The elevator apparatus is characterized by this.

7. In a control method for an elevator system comprising a car, a safety control device that detects the position of the car and executes a safety process by comparing the detected position of the car with a pre-registered floor position, when the car is operated to a floor where the floor position is registered and then stops with the door open at the floor, if the step difference between the floor surface of the car actually measured by a measuring instrument and the landing floor surface of the floor is within an allowable range, register the current position of the detected car as the floor position; if the step difference is outside the allowable range, register the floor position obtained by changing the current position based on the step difference.

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