Elevator device

Abstract

To provide an elevator device capable of correcting the detection of an absolute position of a car.SOLUTION: An elevator device according to the present embodiment comprises a car moving up / down in a hoistway, first car position detection means to detect the car position from a movement amount of the car, cord tape suspended in the hoistway, second car position detection means provided in the car to read the cord of the cord tape and detect the car position, and a control device to control elevation of the car by correcting second car position information based on the difference between first car position information by the first car position detection means and the second car position information by the second car position detection means.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] FIELD OF THE INVENTION An embodiment of the present invention relates to an elevator system. [Background technology]

[0002] Generally, an absolute positioning system (APS) is used to detect the absolute position of an elevator car. Here, the APS detects the absolute position of the car by reading a code tape installed in the elevator shaft with an APS sensor attached to the car. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7345616 [Patent Document 2] Patent No. 7133531 [Patent Document 3] Patent No. 6658724 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above technology, the cord tape has the property of expanding and contracting with temperature changes, so that thermal expansion of the cord tape occurs due to temperature changes in the location where the cord tape is installed, causing fluctuations in the magnitude of the cord tape's displacement, which results in deviations in the detection of the car's absolute position every time the temperature changes.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an elevator system that can calculate the expansion / contraction rate of a cord tape due to temperature changes and correct the detection of the absolute position of the car. [Means for solving the problem]

[0006] An elevator system according to an embodiment for solving the above problems includes a car that moves up and down in a hoistway, a code tape suspended in the hoistway, a first car position detection means, a second car position detection means, and a control device. The first car position detection means detects the car position from the amount of movement of the car. The second car position detection means is provided in the car and detects the car position by reading the code on the code tape. The control device corrects the second car position information based on the difference between first car position information from the first car position detection means and second car position information from the second car position detection means, and controls the lifting and lowering of the car. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a perspective view of an elevator apparatus according to an embodiment of the present invention. [Figure 2] FIG. 2 is a block diagram showing a control system of the elevator apparatus according to the present embodiment. [Figure 3] FIG. 2 is a physical block diagram of a control unit according to the present embodiment. [Figure 4] FIG. 2 is a functional block diagram of a control unit according to the present embodiment. [Figure 5] 10 is a flowchart for explaining a car position correction process executed by a control unit according to the present embodiment. [Figure 6] 6 is a graph for explaining a positional deviation of the position information of the car due to the temperature characteristics of the code tape of the elevator apparatus according to the present embodiment. [Figure 7] 1A is an example of each parameter of the elevator system according to the present embodiment, and FIG. 1B is a table showing the temperature characteristics of the code tape according to the present embodiment. [Figure 8] 2 is a graph showing the relationship between the temperature change in the hoistway of FIG. 1 and the elongation of the cord tape of FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0008] This embodiment will be described below with reference to the drawings. In the description, an XYZ coordinate system consisting of mutually orthogonal X, Y, and Z axes will be used where appropriate. The drawings and flowcharts used to describe this embodiment are merely examples.

[0009] In an elevator system that detects the absolute vertical position of a car using an APS (Absolute Positioning System) that uses a code tape containing position information, deviations in this absolute position due to expansion and contraction of the code tape due to ambient temperature are corrected. To achieve this, the elevator system according to this embodiment uses a traction machine pulse generator (hereinafter simply referred to as a pulse generator (PG)) that detects the vertical position of the car to determine the expansion and contraction of the code tape. Here, the vertical position information of the car detected by the APS sensor and the pulse generator installed in the car is compared, and the deviation between the measurement data of the APS sensor and the measurement data of the pulse generator is detected as position deviation information. This position deviation information and hoistway (internal) temperature information, which is the temperature inside the hoistway, are compared with the temperature characteristics of the expansion and contraction of the code tape, the amount of expansion and contraction of the code tape is calculated, and the absolute position of the car is corrected based on this amount of expansion and contraction.

[0010] FIG. 1 is a perspective view of an elevator system 10 according to this embodiment. The elevator system 10 is disposed inside a hoistway 100 provided in a building such as a commercial facility or a residential facility. As shown in FIG. 1, the elevator system 10 includes a car 31, a counterweight 50, an elevator motor 40, guide rails 21 to 24, a control panel 70 (control device), a temperature measuring device 5, a long position detection code tape 20A, an APS (Absolute Positioning System) sensor 20, which is a code reading device that reads position information from the position detection code tape 20A to detect the absolute position of the car 31, a position detection clip 33 provided in the hoistway 100 for detecting the car 31's arrival at a floor, and a pulse generator (PG) 30 (first car position detection means). The APS sensor 20, which is second car position detection means, reads the position detection clip 33 and detects that the car 31 has arrived at each floor.

[0011] Each of the guide rails 21 to 24 is a member whose longitudinal direction is the Z-axis direction. The guide rails 21 and 22 are a pair of members for guiding the car 31 so that it can move up and down freely. The guide rails 23 and 24 are a pair of members for guiding the counterweight 50 so that it can move up and down freely. The guide rails 21 and 22 are arranged to be spaced apart in the Y-axis direction. Similarly, the guide rails 23 and 24 are also arranged to be spaced apart from each other in the Y-axis direction. In FIG. 1, the guide rails 23 and 24 of the counterweight 50 are arranged to be spaced apart in the X-axis direction from the guide rails 21 and 22 of the car 31. The arrangement of the guide rails 21 to 24 is not limited to the arrangement shown in FIG. 1.

[0012] The car 31 is a unit that accommodates passengers and moves them up and down the elevator shaft 100. The car 31 is disposed between the guide rails 21 and 22, and is attached to the guide rails 21 and 22 so as to be movable in the up and down direction.

[0013] An opening 31a for entering and exiting the interior is formed on the side surface on the +X side of the car 31. The opening 31a is closed or opened by a pair of doors 32 that move along the side surface of the car 31. The doors 32 are opened and closed by an opening / closing motor (not shown).

[0014] The counterweight 50 is attached so as to be movable up and down relative to the guide rails 23 and 24. The weight of the counterweight 50 is adjusted to be a predetermined ratio to the weight of the car 31.

[0015] The lift motor 40 is a motor for raising and lowering the car 31. The lift motor 40 is disposed at the top of the elevator shaft 100 so that its rotation axis is parallel to the Y axis. A pulley 42 is fixed to the rotation axis of the lift motor 40.

[0016] A wire 43 is wound around the pulley 42 of the lift motor 40. One end of the wire 43 is fixed to the car 31, and the other end is fixed to the counterweight 50. The counterweight 50 is attached so as to be able to move up and down relative to the guide rails 23, 24. The weight of the counterweight 50 is adjusted to be a predetermined ratio to the weight of the car 31. When the lift motor 40 is driven to rotate in response to a drive command from the control panel 70, which will be described later, the lift motor 40 rotates in a predetermined direction, and the car 31 moves up and down via the wire 43.

[0017] The control panel (control device) 70 is disposed in the elevator shaft 100. The control panel 70 controls the elevator motor 40, the devices provided in the elevator car 31, and the like.

[0018] The pulse generator 30 is installed on the elevator motor 40, and outputs a pulse signal corresponding to the rotation direction to the control panel 70 in synchronization with the rotation of the elevator motor 40. The control panel 70 counts the pulse signals output from the pulse generator 30 to detect the height position of the elevator car 31 within the elevator shaft 100 as first elevator car position information.

[0019] 1, the long position detection code tape 20A is installed in the hoistway 100 so that the longitudinal direction of the position detection code tape 20A is aligned with the direction of movement of the car 31. The upper end of the position detection code tape 20A is fixed near the top of the hoistway 100, and the lower end of the position detection code tape 20A is fixed near the bottom of the hoistway 100.

[0020] The position detection code tape 20A is installed over a range longer than the total length of the range in which the car 31 moves. The position detection code tape 20A has position information in the height direction within the elevator shaft 100. In this embodiment, this position information is set on the surface of the position detection code tape 20A using image data such as a barcode or a two-dimensional code. Here, the position information may be read using information other than image data.

[0021] An APS sensor (APS) 20 that reads position information from the position detection code tape 20A is provided above the car 31. The APS sensor 20 faces the position detection code tape 20A and continuously reads the position information while the car 31 is moving. The APS sensor 20 optically reads the position information from the position detection code tape 20A. For example, the APS sensor 20 has a function of irradiating a barcode or a two-dimensional code with light and a function of reading position information from the position detection code tape 20A from light reflected from the barcode or the two-dimensional code and transmitting it to a control panel (control device) 70. Based on the position information received from the position detection code tape 20A, the control panel 70 detects the height position of the car 31 within the hoistway 100 as second car position information.

[0022] The APS sensor 20 also reads the position detection clip 33, detects that the car 31 has landed on each floor, generates a floor-landing signal, and outputs the floor-landing signal to an APS position information and specific floor information acquisition unit 80B (see FIG. 4, described later) of the control unit 80. Here, the position detection clip 33 is a metal clip with a bar set on the code tape 20A, and is provided on the elevator shaft 100 side near the landing entrance of each floor so that it is positioned on the optical axis of the light-emitting element and light-receiving element of the APS sensor 20 when the car 31 has landed on each floor.

[0023] As shown in Fig. 1, a temperature measuring device 5 is provided in the hoistway 100. The temperature measuring device 5 measures the temperature in the hoistway 100 and transmits (outputs) the measured temperature information to a control unit 80 (see Fig. 2) of the control panel 70 via wired communication or wireless communication.

[0024] The control panel 70 controls the operation of the car 31 in accordance with the height position of the car 31 detected based on the position information of the position detection code tape 20A transmitted from the APS sensor 20. When the car 31 lands on a floor, the control panel 5 detects a positional deviation (difference) between the floor landing position information of the same floor detected using the pulse generator 30 at the floor where the car 31 lands and the second car position information (absolute position of the car 31) detected by reading the position detection code tape 20A, and if this positional deviation (difference) is equal to or greater than a predetermined threshold, executes a car position correction process described later. That is, when the control panel 5 determines that this positional deviation is equal to or greater than a predetermined threshold, it determines that the code tape 20A has expanded or contracted due to a temperature change, calculates the expansion / contraction rate, and corrects the absolute position at the time of landing.

[0025] 2 is a block diagram showing a control system of the elevator apparatus 10. The control system is configured to include a control unit 80 and a drive unit 91 housed in a control panel 70, and an operation panel 36 provided on the car 31.

[0026] The operation panel 36 is provided on the inner wall surface of the car 31. The operation panel 36 is an interface for receiving destination floors and other information from users of the car 31. By operating the operation panel 36, users can register destination floors and other information for the car 31 and open and close the doors 32. The operation panel 36 is connected to a control unit 80 housed in the control panel 70 via a cable 44 shown in FIG. 1.

[0027] 2 supplies power to the lift motor 40 to drive the lift motor 40. The drive unit 91 drives the lift motor 40 based on instructions from the control unit 80.

[0028] The control unit 80 controls the drive unit 91 based on input from the operation panel 36 or the call panel on each floor. For example, when the control unit 80 rotates the lift motor 40 in the forward direction via the drive unit 91, the car 31 rises and the counterweight 50 descends. When the control unit 80 rotates the lift motor 40 in the reverse direction via the drive unit 91, the car 31 descends and the counterweight 50 ascends.

[0029] 3 is a physical block diagram of the control unit 80. The control unit 80 is a computer having a CPU (Central Processing Unit) 81, a main memory 82, an auxiliary memory 83, and an interface 84, which are interconnected via a bus 85. The CPU 81 executes the processes described below in accordance with a program stored in the auxiliary memory 83. The main memory 82 includes RAM (Random Access Memory) and the like. The main memory 82 is used as a working area for the CPU 81. The auxiliary memory 83 includes non-volatile memory such as ROM (Read Only Memory) and semiconductor memory. The auxiliary memory 83 stores the programs executed by the CPU 81, various parameters, and the like.

[0030] The interface unit 84 has a serial interface, a parallel interface, a wireless LAN interface, etc. The operation panel 36 and the drive unit 91 are connected to the CPU 81 via the interface unit 84. In addition, the interface unit 84 is connected to an input / output device 93 composed of a keyboard, a display, etc.

[0031] 4 is a functional block diagram of the control unit 80. The control unit 80 is configured to include a PG position information acquisition unit 80A, an APS position information and specific floor information acquisition unit 80B, an elevator shaft (inside) temperature acquisition unit 80C, a cord tape expansion / contraction amount calculation unit 80C, and a car position correction unit 80D.

[0032] The PG position information acquisition unit 80A detects the vertical position of the car 31 within the elevator shaft 10 based on the pulse signal input from the pulse generator 30, and outputs the detected position to the code tape expansion / contraction amount calculation unit 80D as the first car position information of the car.

[0033] When the APS position information and specific floor information acquisition unit 80B receives a floor landing signal indicating that the car 31 has landed on each floor from the APS sensor 20, it detects the height position of the car 31 in the elevator shaft 100 based on the position information of the position detection code tape 20A input from the APS sensor 20, and outputs this to the code tape expansion / contraction amount calculation unit 80D as second car position information of the car 31. Here, the APS position information and specific floor information acquisition unit 80B controls the floor landing position of the car 31 using the second car position information as absolute position information of the car 31.

[0034] The hoistway temperature acquisition unit 80C acquires the temperature information detected by the temperature measurement device 5 as temperature data inside the hoistway 100, and outputs the data to the cord tape expansion / contraction amount calculation unit 80D.

[0035] The code tape expansion / contraction amount calculation unit 80D calculates the expansion / contraction rate of the code tape 20A based on the temperature characteristic data of the code tape 20A, the first car position information, the second car position information, and the temperature information inside the hoistway 100, and outputs the calculated expansion / contraction rate to the car position correction unit 80E. In detail, the code tape expansion / contraction amount calculation unit 80D calculates the difference between the first car position information and the second car position information, and determines whether this difference is due to expansion / contraction of the code tape 20A by referring to a temperature characteristic model that indicates the relationship between the temperature inside the hoistway 100 and the expansion / contraction rate of the code tape 20A. If it determines that this difference is due to expansion / contraction, it calculates the expansion / contraction rate of the code tape 20A and outputs the calculated expansion / contraction rate to the car position correction unit 80E. The control unit 80 implements a temperature characteristic model that indicates the relationship between the temperature inside the hoistway 100 and the expansion / contraction rate of the code tape 20A.

[0036] The car position correction unit 80E corrects the positions of the car other than the lowest floor based on the expansion / contraction rate input from the code tape expansion / contraction amount calculation unit 80D.

[0037] Next, the car position correction process will be described with reference to the flowchart shown in Fig. 5. The following control is performed based on a program stored in the auxiliary storage unit 83, and is mainly performed by the control unit 80 (CPU 81).

[0038] The control unit 80 (APS position information and specific floor information acquisition unit 80B) determines that the elevator car 31 has landed on the lowest floor based on the floor landing signal from the APS sensor 20 when the elevator car 31 has landed on each floor and the position information of the position detection code tape 20A input from the APS sensor 20, and generates a lowest floor landing signal and outputs it to the code tape expansion / contraction amount calculation unit 80D (step S10).

[0039] In the next step S11, the code tape expansion / contraction amount calculation unit 80D compares the first car position information of the car 31 from the PG position information acquisition unit 80A with the second car position information of the car, which is the vertical position of the car 31 within the elevator shaft 100, from the APS position information and specific floor information acquisition unit 80B.

[0040] In step S12, the cord tape expansion / contraction amount calculation unit 80D determines whether or not the difference between the first car position information and the second car position information is due to expansion of the cord tape 20A, based on the temperature data from the temperature measurement device 5 and the implemented temperature characteristic model. The cord tape expansion / contraction amount calculation unit 80D determines whether or not this difference is equal to or greater than a predetermined value (in this embodiment, this predetermined value is set to 0.5 mm), and if it determines that the difference is equal to or greater than the predetermined value, determines that the difference is due to expansion of the cord tape 20A. For example, the code tape expansion / contraction amount calculation unit 80D calculates the difference between the first car position information and the second car position information as a detection error and determines whether the value is 0.5 mm or more. If it is determined that the detection error is 0.5 mm or more, the process proceeds to the next step S13, and if it is determined that the detection error is less than 0.5 mm, the process returns to step S10 without correcting the position. The code tape expansion / contraction amount calculation unit 80D may be configured to determine whether or not this difference exceeds a maximum value, and if it determines that it does, to determine that an error has occurred.

[0041] Fig. 6 is a graph for explaining the difference (positional deviation) in the position information of the car 31 due to the temperature characteristics of the code tape 20A of the elevator system 10 in Fig. 1. Here, a brief explanation will be given of the difference between the first car position information from the pulse generator 30 and the second car position information from the APS sensor 20. Note that the car 31 is under downward operation control. Fig. 6(a) shows a graph when the difference is zero, and Fig. 6(b) shows a graph when a difference occurs. In Fig. 6(a), since the difference is zero, it is determined that the heightwise positions of the car 31 measured by the pulse generator 30 and the APS sensor 20 are the same. In Fig. 6(b), a difference occurs, and this difference is determined as a detection error, and it is determined that the code tape has stretched due to thermal expansion.

[0042] In step S13, the cord tape expansion / contraction calculation unit 80D compares the temperature at the time of error detection with the temperature at the time of the previous position correction, and proceeds to the next step S14. For example, the cord tape expansion / contraction calculation unit 80D recognizes that when the detection error is 0.5 mm, the temperature change is 3.125 K (the area surrounded by a solid line in the table in FIG. 7(b)).

[0043] In step S14, the cord tape expansion / contraction amount calculation unit 80D determines whether the temperature characteristics (temperature characteristic model) of the cord tape and the detection error (difference) match. If they do not match (NO in step S14), it is determined that the difference is due to a mechanical abnormality (for example, wear on the hoist sheave or main rope) rather than the effect of elongation due to thermal expansion of the cord tape 20A. If they match (YES in step S14), it is determined that the difference is due to elongation of the cord tape 20A, and the process proceeds to the next step, S15.

[0044] Fig. 7(a) shows an example of each parameter of the elevator system, and Fig. 7(b) is a table showing the temperature characteristics of the cord tape. Fig. 8 is a graph showing Fig. 7(b), which is a graph showing the thermal expansion characteristics of the cord tape, which is the relationship between the hoistway temperature and the elongation of the cord tape.

[0045] FIG. 8 shows the thermal expansion characteristics of the cord tape 20A. It is a graph showing the relationship between temperature change, which indicates a change from a reference temperature inside the hoistway 100, and the elongation of the cord tape 20A. This graph is implemented (stored) in advance as a temperature characteristic model in the main memory 82 or auxiliary memory 83 of the control unit 80. The horizontal axis represents the temperature change (ΔT (°C)) inside the hoistway 100, and the vertical axis represents the elongation (λ (mm)) of the cord tape 20A from the reference value. Here, when the temperature change inside the hoistway 100 is zero, the elongation of the cord tape 20A is zero. FIG. 8 shows that when the temperature T1 inside the hoistway 100 rises to a temperature T2, the elongation of the cord tape 20A increases from L1 to L2.

[0046] Here, the relationship between the temperature change ΔT from the reference temperature in the hoistway 100 and the elongation λ (mm) of the cord tape 20A corresponding to the temperature change ΔT (° C.) is expressed by the following equation. λ=L×α×ΔT (Formula 1) Here, L is the length of the cord tape 20A, and α is the thermal expansion coefficient of the elongation of the cord tape 10. Equation 1 represents the elongation λ of the cord tape 20A at a position corresponding to the length from the upper end of the cord tape 20A. Note that formula (1) is determined not only by the thermal expansion coefficient determined by the properties of the material used for the cord tape 20A, but also by modeling coefficients determined by a mechanical system that takes into account the installation state of the APS sensor 20 and the cord tape 20A, and values ​​determined based on actual measurement data, etc. For example, it is determined based on parameter information shown in Fig. 7(a) (e.g., the lifting stroke (N), the cord tape thermal expansion coefficient (α), the position resolution of the APS sensor 20, the position resolution of the hoisting machine PG30, etc.).

[0047] In step S15, the cord tape expansion / contraction amount calculation unit 80D calculates the expansion / contraction rate from the distance from the hanging point of the cord tape to the specific floor and the detected expansion (detection error), and then proceeds to the next step S16.

[0048] In step S16, the car position correction unit 80E reflects the calculated expansion / contraction rate in the APS position detection, corrects the position detection of floors other than the lowest floor based on the expansion / contraction rate, and ends the car position correction process. Here, the control unit 80 acquires temperature information inside the elevator shaft 100 from the temperature measurement device 5. The control unit 80 acquires first car position information of the car 31 from the pulse generator 30 and second car position information of the car 31 from the APS sensor 20. The control unit 80 acquires the temperature information, the first car position information, and the second car position information, calculates an expansion / contraction ratio from the expansion amount (detection error) of the code tape 20A, and calculates a correction amount for floors other than the lowest floor based on this expansion / contraction ratio. The control unit 80 controls the landing position of the car 31 based on the calculated correction amount.

[0049] According to the elevator device 10 of this embodiment as described above, deviations in car position detection caused by thermal expansion or contraction of the code tape due to temperature changes in the elevator shaft can be corrected, thereby reducing deviations in the car's landing position.

[0050] In the above-described embodiment, the elevator car position correction process is configured to be executed when the elevator car lands on the lowest floor, but the present invention is not limited to this, and for example, the elevator car position correction process may be configured to be executed when the elevator car lands on each floor, or when the elevator car lands on a set floor.

[0051] Furthermore, the control unit 80 may be configured to record the above-mentioned difference (positional deviation) and temperature information obtained from the temperature measuring device 5 in a storage device such as a memory each time the car 31 lands at a floor, thereby constructing a database that records the temperature characteristics of the positional deviation of the car 31. When controlling the landing of the car 31, the control unit 80 corrects the position information of the position detection code tape 20A read by the APS sensor 20 based on this database and the temperature information from the temperature measuring device 5, and executes the landing control based on the corrected position information. Here, the control unit 80 executes floor alignment operation of the car 31 based on the corrected position information and the floor landing position information. This makes it possible to suppress floor alignment operation caused by temperature changes in the position information of the position detection code tape 20A, and to reduce the amount of movement during floor alignment operation.

[0052] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments may be embodied in various other forms, and various omissions, substitutions, and modifications may be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as set forth in the claims. [Explanation of symbols]

[0053] 5 Temperature measuring device 10 Elevator equipment 20 APS (Absolute Positioning System) sensors 20A Cord Tape 21~24 Guide rails 30 Pulse Generator 31 Car 31a opening 32 Doors 33 Position detection clip 36 Operation Panel 40 Lifting motor 42 Pulley 43 Wire 44 Cable 50 Counterweight 70 Control Panel 80 Control Unit 81 CPU 82 Main memory 83 Auxiliary storage 84 Interface section 85 Bus 91 Drive unit 93 Input / Output Devices 100 Elevator

Claims

1. A car that moves up and down inside the elevator shaft, a first car position detection means for detecting a car position from the amount of movement of the car; A cord tape suspended within the hoistway; a second car position detection means provided in the car, which reads the code on the code tape and detects the car position; an elevator device comprising: a control device that corrects the first car position information based on a difference between the first car position information obtained by the first car position detection means and the second car position information obtained by the second car position detection means, and controls the raising and lowering of the car.

2. a temperature measuring device that measures the temperature inside the elevator shaft and outputs the measured temperature information; a temperature characteristic model showing a relationship between a temperature change amount in the elevator shaft and an elongation amount of the cord tape, the control device determines whether the difference is due to elongation of the cord tape based on the temperature information from the temperature measuring device and the temperature characteristic model.

2. The elevator system of claim 1.

3. the control device determines whether the difference is equal to or greater than a predetermined value, and if it determines that the difference is equal to or greater than the predetermined value, determines whether the difference matches the temperature characteristic model; 3. An elevator system according to claim 1 or 2.

4. When the difference matches the temperature characteristic model, the control device determines that the difference is due to elongation of the cord tape.

4. The elevator system according to claim 3.

5. When the difference does not match the temperature characteristic model, the control device determines that the difference represents a mechanical abnormality.

4. The elevator system according to claim 3.

6. The control device determines whether the difference exceeds a maximum value, and if it determines that the difference exceeds a maximum value, determines that an error has occurred.

3. An elevator system according to claim 1 or 2.

7. a position detection clip provided in the elevator shaft for detecting the arrival of the elevator car on a floor; The second car position detection means reads the position detection clip, and when it detects that the car 31 has landed on each floor, executes a process to correct the car position information.

3. An elevator system according to claim 1 or 2.

8. 3. The elevator system according to claim 1, wherein the first car position detecting means is a pulse generator, and the second car position detecting means is an APS sensor.

9. 2. The elevator apparatus according to claim 1, wherein the temperature characteristic model has a relationship of λ=L×α×ΔT, where ΔT is the amount of temperature change, λ is an amount of elongation of the cord tape, L is a length of the cord tape, and α is a thermal expansion coefficient of the elongation of the cord tape.

10. a temperature measuring device that measures the temperature inside the elevator shaft and outputs the measured temperature information; a database that records a temperature in the elevator shaft and positional deviation information between the position information and the landing position information relative to the temperature, 2. The elevator apparatus according to claim 1, wherein the control device corrects the position information acquired from the code tape based on the temperature information acquired by the temperature measuring device and the database, and controls the landing of the elevator car based on the corrected position information.

11. The elevator apparatus according to claim 10, wherein the control device performs floor-level alignment operation of the car based on the corrected position information and the floor landing position information.

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