Position detection system for elevator

Abstract

Disclosed is a position detection system for an elevator in which the number of detectors can be reduced. This position detection system comprises: a movement detector (2) that outputs a movement detection signal according to the displacement or the velocity of an elevator car (20); a plurality of magnetic bodies (3) provided adjacent to a plurality of floors inside a hoistway; a magnetic pole detector (4) that is provided to the elevator car, detects each magnetic pole of the plurality of magnetic bodies, and outputs a magnetic pole detection signal according to the polarity of the magnetic pole; and a position detection device (5) that detects the position of the elevator car on the basis of the movement detection signal. The position detection device corrects the position of the elevator car detected by the position detection device to a pre-stored absolute position of the elevator car according to the detection of the magnetic pole, and determines the polarity of the magnetic pole on the basis of the magnetic pole detection signal. Furthermore, on the basis of the polarity determined by the position detection device, the position detection device determines the specific floor where the elevator car is located from among a plurality of specific floors constituting the plurality of floors.

Description

Elevator position detection system

[0001] The present invention relates to an elevator position detection system that detects the position of a car within a hoistway.

[0002] In an elevator, the operation of the car is controlled based on the position of the car detected by position detection systems provided in the elevator shaft and in the car.

[0003] As a conventional technique related to an elevator position detection system, the following technique described in Patent Document 1 is known.

[0004] The elevator car is provided with a position detector consisting of a transmission optical sensor that detects the position of the elevator car in the elevator shaft, and a limit cam. The elevator shaft is provided with a plurality of shielding plates, an upper floor limit switch, a lower floor limit switch, an upper floor forced deceleration switch, and a lower floor forced deceleration switch.

[0005] The shielding plate is arranged on each of the plurality of floors so as to block the sensor light of the position detector when the elevator car is located at the entrance / exit area.

[0006] The upper floor limit switch, the lower floor limit switch, the upper floor forced deceleration switch, and the lower floor forced deceleration switch are operated by limit cams.

[0007] The upper floor limit switch detects when the car has moved upward beyond the top floor. The lower floor limit switch detects when the car has moved downward beyond the bottom floor. The upper floor forced deceleration switch detects when the car is moving upward and approaching the top floor. The lower floor forced deceleration switch detects when the car is moving downward and approaching the bottom floor.

[0008] Japanese Patent Application Laid-Open No. 2022-177618

[0009] In the above-mentioned prior art, a number of detectors are used to detect the position of the car in the elevator shaft.

[0010] Therefore, the present invention provides an elevator position detection system that can reduce the number of detectors.

[0011] In order to solve the above problems, the elevator position detection system of the present invention includes a movement detector that outputs a movement detection signal in response to the displacement or speed of the car, multiple magnetic bodies provided adjacent to multiple floors in the elevator shaft, a magnetic pole detector provided in the car that detects the magnetic poles of the multiple magnetic bodies and outputs a magnetic pole detection signal in response to the polarity of the magnetic poles, and a position detection device that detects the position of the car based on the movement detection signal. In response to the detection of the magnetic pole, the position detection device corrects the car position detected by the position detection device to a pre-stored absolute position of the car and determines the polarity of the magnetic pole based on the magnetic pole detection signal. Furthermore, the position detection device determines the specific floor on which the car is located among multiple specific floors that make up the multiple floors based on the polarity determined by the position detection device.

[0012] According to the present invention, the number of detectors in an elevator position detection system can be reduced.

[0013] 1 is a diagram illustrating the overall configuration of an elevator according to an embodiment. FIG. 2 is a top view of a car 20, showing an example of the arrangement of a movement detector 2, a magnetic pole detector 4, and a position detection device 5 shown in FIG. 1. FIG. 3 is a diagram illustrating an example of the positional relationship in the height direction between a detection object 3 and a magnetic pole detector 4 according to an embodiment. FIG. 4 is table data showing the correspondence between the polarity of a detection object 3, the output signal of a magnetic pole detector 4, and the attribute of the floor on which the detection object 3 is installed according to an embodiment. FIG. 5 is a block diagram illustrating the functional configuration of a position detection device 5 (FIG. 1) according to an embodiment. FIG. 6 is a data configuration diagram showing an example of data stored in a specific floor and absolute position storage unit 56 (FIG. 5). FIG. 7 is a flowchart illustrating the operation of a position detection device in an elevator according to a first modified example. FIG. 8 is a diagram illustrating an example of the positional relationship in the height direction between a detection object 3 and a magnetic pole detector 4 in an elevator according to a second modified example. Modes for carrying out the invention

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same components or components having similar functions.

[0015] FIG. 1 is a diagram showing the overall configuration of an elevator according to one embodiment of the present invention.

[0016] As shown in Figure 1, a sheave 9 and a deflector sheave 10 are provided in a machine room 101 located above a hoistway 100 in a building. A main rope 21 is wound around the sheave 9 and the deflector sheave 10. A car 20 and a counterweight 22 are connected to one end and the other end of the main rope 21, respectively. The car 20 and the counterweight 22 are suspended within the hoistway 100 by the main rope 21.

[0017] Buffers 30 and 31 are provided at the bottom, i.e., the pit, of the elevator shaft 100. The buffer 30 receives the car 20 descending beyond the terminal floor (lowest floor). The buffer 31 receives the counterweight 22 descending beyond the terminal floor (lowest floor).

[0018] When the sheave 9 is rotationally driven by an electric motor (not shown) supplied with power from a power converter (not shown) provided in the elevator control device 1, the main rope 21 is driven. As a result, the car 20 and the counterweight 22 rise and fall in opposite directions in the hoistway 100. In this case, the car 20 moves between multiple floors in the hoistway 100. When the car 20 lands and stops at a destination floor, a car door (not shown) provided on the car 20 and a landing door 23 provided at the landing are mechanically engaged. As a result, both the car door and the landing door 23 are driven to open and close by a door drive device (not shown) provided on the car 20.

[0019] In this embodiment, the elevator position detection system that detects the position of the car 20 in the elevator shaft 100 includes a movement detector 2, a detected object 3, a magnetic pole detector 4, and a position detection device 5, as shown in FIG.

[0020] In this embodiment, the position P in the elevator shaft 100 is expressed as a height h(P) from a reference position in the elevator shaft 100. ｃ ) Floor surface S ｃis set as the reference position. The position of the car 20 is expressed by the height of the reference portion of the car 20. In this embodiment, the floor surface S ｃａｒ That is, the position of the elevator car 20 is the lowest floor (F ｃ ) floor surface S ｃ The height h (S ｃａｒ )

[0021] The movement detector 2 outputs a detection signal according to the displacement or speed of the car 20. In the elevator shown in Figure 1, a rotation detector (for example, a rotary encoder or a resolver) that rotates together with the sheave 9 is used as the movement detector 2.

[0022] The detectable body 3 is provided adjacent to each floor in the elevator shaft 100. The detectable body 3 comprises a magnetized magnetic body in order to detect the position of the car 20. One of the south pole and north pole of the magnetic body is fixed to the landing side, and the other is exposed in the elevator shaft 100. The polarity of the magnetic pole exposed in the elevator shaft is set according to the attribute of the floor (end floor (top floor, bottom floor), intermediate floor, non-stop floor, etc.). In this embodiment, as will be described later, the polarity of the magnetic pole exposed in the elevator shaft is set to the south pole and north pole for the end floors (top floor, bottom floor) and intermediate floors, which have different attributes.

[0023] As the magnetized magnetic body, for example, a permanent magnet such as a bonded magnet (such as a rubber magnet or a plastic magnet) or a sintered magnet is used.

[0024] The magnetic pole detector 4 is provided on the car 20 and includes an S-pole detection unit and an N-pole detection unit. When the magnetic pole detector 4 faces the magnetic material of the object to be detected 3 as the car 20 moves, it detects the polarity (S-pole, N-pole) of the magnetic pole exposed inside the hoistway 100. As the S-pole detection unit and the N-pole detection unit included in the magnetic pole detector 4, for example, a Hall IC for S-pole detection and a Hall IC for N-pole detection are applied.

[0025] The position detection device 5 detects the amount of displacement of the car 20 due to the movement of the car 20 based on the detection signal output by the movement detector 2. In this embodiment, the amount of displacement in the upward and downward directions is a positive value and a negative value, respectively. The position detection device 5 continuously detects the position of the car 20 by integrating the detected amount of displacement.

[0026] When the magnetic pole detector 4 detects the magnetic pole of the magnetic material of the object to be detected 3, the position detection device 5 detects the absolute position (=h(S ｃａｒ The position detection device 5 pre-stores absolute position data of the cars 20 corresponding to the plurality of detectable objects 3, and detects the absolute position of the car 20 corresponding to the detected detectable object 3 based on the stored absolute position data.

[0027] When the magnetic pole detector 4 detects the magnetic pole of the magnetic material included in the detection target 3, the position detection device 5 corrects the position of the car 20, which is continuously detected based on the detection signal output by the movement detector 2, to the detected absolute position of the car 20. The position detection device 5 outputs a car position signal indicating the corrected position of the car 20.

[0028] The position detection device 5 identifies the attribute of the floor on which the car 20 is located based on the polarity of the magnetic pole of the magnetic material of the detection target 3 detected by the magnetic pole detector 4. In this embodiment, when the detected polarity is an S pole or an N pole, the position detection device 5 determines that the floor on which the car 20 is located is an end floor or an intermediate floor, respectively. The position detection device 5 outputs a specific floor signal indicating the attribute of the identified floor.

[0029] The position detection device 5 continuously detects the position of the car 20 by accumulating the displacement of the car 20 detected based on the detection signal output by the movement detector 2 until the next magnetic pole of the magnetic material provided in the object to be detected 3 is detected, and outputs a car position signal.

[0030] The car position signal and the specific floor signal output by the position detection device 5 are transmitted to the elevator control device 1 via a communication line provided in the tail cord 70. The elevator control device 1 controls the normal operation and the controlled operation of the car 20 based on the car position signal and the specific floor signal that it receives.

[0031] Fig. 2 is a top view of the car 20, showing an example of the arrangement of the movement detector 2, the magnetic pole detector 4, and the position detection device 5 shown in Fig. 1. For convenience, Fig. 2 shows a state in which the landing door 23 and the car door 24 are open.

[0032] The magnetic pole detector 4 is located on the car 20 and on the car door 24, and is located adjacent to the car door 24 on the top surface of the car 20 and at one end of the car door 24 in the opening and closing direction.

[0033] The detected object 3 is located on the landing door 23 and is a member fixed to the landing side, at a position facing the magnetic pole detector 4 as the car 20 moves. For example, the detected object 3 is attached to a frame (door hanger frame) that supports the landing door 23 so that it can be opened and closed.

[0034] According to this example, the detection object 3 can be provided adjacent to each floor in the elevator shaft 100 without increasing the space required for mounting the detection object 3 .

[0035] FIG. 3 shows an example of the positional relationship in the height direction between the object to be detected 3 and the magnetic pole detector 4 in this embodiment.

[0036] The magnetic pole detector 4 includes an N-pole detection unit 41 and an S-pole detection unit 42. The N-pole detection unit 41 and the S-pole detection unit 42 are arranged vertically in this order with a distance d between their centers in the height direction.

[0037] As the north pole detector 41 and the south pole detector 42, for example, a Hall IC for detecting the north pole and a Hall IC for detecting the south pole are applied, respectively.

[0038] In addition, in FIG. 3, the polarity of the exposed magnetic pole surface of the detection object 3 (hereinafter referred to as "polarity of the detection object 3") is N pole.

[0039] 3, there is no magnetic field at the position of the magnetic pole detector 4 indicated by the solid line, and therefore the N pole detector 41 and the S pole detector 42 do not output a magnetic pole detection signal. In other words, the magnetic pole detector 4 does not detect either the N pole or the S pole.

[0040] When the magnetic pole detector 4 (solid line) moves in the direction of arrow D as the car 20 (FIG. 1) descends, first the S-pole detection unit 42 faces the object to be detected 3, and then the N-pole detection unit 41 faces the object to be detected 3. Because the polarity of the object to be detected 3 is the N-pole, the S-pole detection unit 42 continues to not output a magnetic pole detection signal, but the N-pole detection unit 41 outputs a magnetic pole detection signal. In other words, the magnetic pole detector 4 detects the N-pole.

[0041] 3, there is no magnetic field at the position of the magnetic pole detector 4 indicated by the two-dot chain line, and therefore the north pole detector 41 and the south pole detector 42 do not output a magnetic pole detection signal. In other words, the magnetic pole detector 4 does not detect either the north pole or the south pole.

[0042] When the magnetic pole detector 4 (two-dot chain line) moves in the direction of arrow U as the car 20 (FIG. 1) rises, first the N-pole detection unit 41 faces the object to be detected 3, and then the S-pole detection unit 42 faces the object to be detected 3. Because the polarity of the object to be detected 3 is N-pole, the N-pole detection unit 41 outputs a magnetic pole detection signal. In other words, the magnetic pole detector 4 detects the N-pole.

[0043] 4 is table data showing the correspondence between the polarity of the object to be detected 3, the output signal of the magnetic pole detector 4, and the attribute of the floor on which the object to be detected 3 is installed in this embodiment. Note that FIG. 4 also shows the output signal in the absence of a magnetic field.

[0044] In this embodiment, the polarity of the detection object 3 is set to N pole and S pole on the intermediate floors and end floors (the top floor and the bottom floor), respectively. For example, if the first and fifth floors are the end floors (the top floor and the bottom floor, respectively), the intermediate floors are the second to fourth floors.

[0045] 4, an output signal OFF corresponds to a magnetic pole detection signal indicating that a magnetic pole has been detected, and an output signal ON indicates that the magnetic pole detection signal is not being output.

[0046] The ON and OFF states of the output signal correspond to high and low states of a voltage signal, or 1 and 0 states of a digital signal, respectively.

[0047] 4, the relationship between the north pole and the output signal corresponds to the relationship between the polarity (north pole) of the detection object 3 and the outputs of the north pole detector 41 and the south pole detector 42 in FIG.

[0048] 4, when the polarity of the object to be detected 3 is N pole, the output signals of the N pole detection unit 41 and the S pole detection unit 42 are OFF and ON, respectively. When the polarity of the magnetic pole of the object to be detected 3 is S pole, the output signals of the N pole detection unit 41 and the S pole detection unit 42 are ON and OFF, respectively. In other words, when the magnetic pole detector 4 detects the magnetic pole of the object to be detected 3, the output signal of one of the N pole detection unit 41 and the S pole detection unit 42 is OFF, and the output signal of the other is ON.

[0049] Therefore, the polarity of the magnetic pole of the object to be detected 3 is determined based on the ON and OFF of the output signals of the N-pole detection unit 41 and the S-pole detection unit 42. For example, by detecting a transition from ON to OFF of the output signal of either the N-pole detection unit 41 or the S-pole detection unit 42, it is determined that the magnetic pole of the object to be detected 3 has been detected by the magnetic pole detector 4. Furthermore, the polarity of the magnetic pole of the object to be detected 3 is determined depending on which of the N-pole detection unit 41 and the S-pole detection unit 42 has its output signal transitioned from ON to OFF. The attribute of the floor on which the object to be detected 3 is installed, i.e., the floor on which the car 20 (FIG. 1) is located, is identified depending on the determined polarity.

[0050] In this embodiment, when it is determined that the magnetic pole of the object to be detected 3 has been detected based on the output signals of the N-pole detection unit 41 and the S-pole detection unit 42, the polarity of the magnetic pole of the object to be detected 3 is determined depending on which output signal of the N-pole detection unit 41 or the S-pole detection unit 42 is OFF.

[0051] FIG. 5 is a block diagram showing the functional configuration of the position detection device 5 (FIG. 1) in this embodiment.

[0052] In this embodiment, the position detection device 5 includes a computer system such as a microcomputer, and functions as each unit by the computer system executing a predetermined program.

[0053] The position detection device 5 includes a displacement amount detection unit 51 , a car position detection unit 52 , a polarity determination unit 53 , a specific floor determination unit 54 , an absolute position detection unit 55 , and a specific floor and absolute position storage unit 56 .

[0054] The displacement amount detection unit 51 calculates the amount of displacement of the car 20 based on the movement detection signal output by the movement detector 2 in accordance with the movement (displacement or speed) of the car 20 .

[0055] The car position detection unit 52 continuously calculates the position of the car 20 by integrating the displacement amount of the car 20 calculated by the displacement amount detection unit 51. Furthermore, when the magnetic pole of the object to be detected 3 is detected, the car position detection unit 52 corrects the calculated position of the car 20 to an absolute position, which will be described later. When the magnetic pole of the object to be detected 3 is not detected and when it is detected, the car position detection unit 52 outputs the calculated position of the car 20 and the corrected position of the car 20 as a position signal S ｃｐ Output as

[0056] The polarity determination unit 53 determines whether or not the magnetic pole of the object to be detected 3 has been detected, and also determines the polarity of the magnetic pole of the object to be detected 3, based on the ON and OFF states of the output signals of the N-pole detection unit 41 and the S-pole detection unit 42 of the magnetic pole detector 4 (see FIG. 4). When the polarity determination unit 53 determines that the magnetic pole of the object to be detected 3 has been detected, it sends out a magnetic pole detection signal S. Furthermore, the polarity determination unit 53 outputs the determined polarity as a magnetic pole polarity signal S. Ｓ，Ｎ Send it as.

[0057] In this embodiment, the polarity determination unit 53 calculates the logical sum of the output signals of the N-pole detection unit 41 and the S-pole detection unit 42, and if the calculated logical sum is OFF, determines that the magnetic pole of the object to be detected 3 has been detected. The polarity determination unit 53 also has data (see FIG. 4 ) indicating the correspondence between the polarity of the magnetic pole of the object to be detected 3 and the output signal of the magnetic pole detector 4, and determines the polarity of the magnetic pole of the object to be detected 3 based on this data.

[0058] When the absolute position detection unit 55 receives the magnetic pole detection signal S, it extracts the absolute position of the car 20 stored in a specific floor and absolute position storage unit 56 (described later). The absolute position detection unit 55 sends the extracted absolute position to the car position detection unit 52.

[0059] In this embodiment, when the absolute position detection unit 55 receives the magnetic pole detection signal S, it extracts the absolute position closest to the position of the car 20 calculated by the car position detection unit 52 from a plurality of absolute positions stored in a specific floor and absolute position storage unit 56, which will be described later. The car position detection unit 52 corrects the calculated position of the car 20 to the absolute position received from the absolute position detection unit 55.

[0060] The specific floor determination unit 54 receives the magnetic pole polarity signal S from the polarity determination unit 53. Ｓ，Ｎ Based on the specific floor signal S ｓｆ Output as

[0061] The elevator control device 1 receives a specific floor signal S ｓｆ Based on this, the terminal floor stop control is executed.

[0062] 6 is a data configuration diagram showing an example of data stored in the specific floor and absolute position storage unit 56 (FIG. 5). It is assumed that the building in which the elevator is installed has three floors.

[0063] The specific floor and absolute position storage unit 56 stores the floor (F ａ , F ｂ , F ｃ (Fig. 1)), detection polarity (S pole, N pole), specific floor (end floor, intermediate floor), and car absolute position (h ａ , h ｂ , h ｃ ) and table data showing the correspondence between them.

[0064] The detected polarity is the polarity (south pole, north pole) of the magnetic pole of the detection object 3 detected by the polarity determination unit 53 .

[0065] The specific floor is an attribute of the floor where the elevator car is located (end floor, intermediate floor).

[0066] The absolute car position is the lowest floor (F ｃ ) floor surface S ｃ The height h (S ｃａｒ ) (see Figure 1).

[0067] When the absolute position detection unit 55 receives the magnetic pole detection signal S, it detects the car absolute position h ａ , h ｂ , h ｃ From the above, the absolute position closest to the position of the elevator car 20 calculated by the elevator car position detection unit 52 is extracted.

[0068] The specific floor determination unit 54 determines the specific floor (end floor, intermediate floor) on which the elevator car 20 is located from the specific floors corresponding to the detected polarity in the table data.

[0069] The position detection device 5 detects the floor (F ａ , F ｂ , F ｃ ) and the car absolute position (h ａ , h ｂ , h ｃ ) based on the relationship between the absolute position of the car 20 detected by the absolute position detection unit 55, the floor on which the car 20 is located may be determined (not shown in Figure 5).

[0070] In this embodiment, as will be explained next, the car absolute position (h ａ , h ｂ , h ｃ ) is measured while the elevator car 20 is in operation. In this case, the absolute position detection unit 55 and the specific floor determination unit 54 of the position detection device 5 are not operated. Furthermore, the magnetic pole detection signal S sent by the polarity determination unit 53 is input to the car position detection unit 52.

[0071] The lowest floor (F ｃ ) at the implantation level (i.e., h(S ｃａｒ The elevator car 20 (where ) = 0) is operated upward. ｃ , F ｂ , F ａWhen the magnetic poles of the detection target bodies 3 provided adjacent to the car 20 are detected in this order, the car position detection unit 52 converts the position of the car 20 calculated from the displacement amount of the car 20 detected by the displacement amount detection unit 51 into the absolute position (h ａ , h ｂ , h ｃ ) and stored in the specific floor and absolute position storage unit 56.

[0072] 7 is a flowchart showing the operation of the position detection device 5 in this embodiment. The following description will be made with reference to FIG. 5 as needed.

[0073] When the position detection device 5 starts the process, first in step S11, it determines using the polarity determination unit 53 whether it has detected the magnetic pole of the detection object 3. If it determines that it has detected the magnetic pole (YES in step S11), it then executes step S12. If it determines that it has not detected the magnetic pole (NO in step S11), it ends the series of processes.

[0074] In step S12, the position detection device 5 corrects the position of the car 20 calculated by the car position detection unit 52, using the absolute position detection unit 55. After executing step S12, the position detection device 5 then executes step S13.

[0075] In step S13, the position detection device 5 determines whether the magnetic pole of the detection object 3 is an S pole using the polarity determination unit 53. If the position detection device 5 determines that the magnetic pole is an S pole (YES in step S13), it then executes step S14. If the position detection device 5 determines that the magnetic pole is not an S pole (NO in step S13), it ends the series of processes.

[0076] In step S14, the position detection device 5 determines that the specific floor where the car 20 is located is an end floor using the specific floor determination unit 54. The position detection device 5 determines that the car absolute position (h ａ , h ｃ ) to determine whether the end floor is the top floor or the bottom floor. After executing step S14, the position detection device 5 ends the series of processes.

[0077] When the position detection device 5 completes the series of processes, it executes step S11 again.

[0078] If the answer is NO in step S13, the polarity of the object to be detected 3 is N pole, so the absolute position detection unit 55 may determine that the specific floor on which the elevator car 20 is located is an intermediate floor, and then end the series of processes.

[0079] Furthermore, in step S13, the position detection device 5 may use the polarity determination unit 53 to determine whether the polarity of the magnetic pole of the object to be detected 3 is an N pole. In this case, if the position detection device 5 determines that the polarity is not an N pole, it next executes step S14, and if it determines that the polarity is an N pole, it ends the series of processes. Note that, if the position detection device 5 determines that the polarity is an N pole, it may determine that the specific floor on which the car 20 is located is an intermediate floor and then end the series of processes.

[0080] According to the position detection system of the above embodiment, the magnetic pole of the object to be detected 3 is detected, and in response to the detection of the magnetic pole, the position of the car 20 calculated based on the displacement of the car 20 is corrected to a preset absolute position, and the specific floor on which the car 20 is located is determined based on the polarity of the detected magnetic pole. This makes it possible to reduce the number of detectors included in the elevator position detection system.

[0081] In the above embodiment, the polarity of the magnetic pole of the detection object 3 provided adjacent to the end floors (the top floor, the bottom floor) is set to S pole, but this is not limiting, and it may be set to S pole on one of the top floor and the bottom floor, and set to N pole on the other floor and on the intermediate floors. When it is set to S pole on the bottom floor, the elevator control device 1 determines whether the specific floor signal S output by the specific floor determination unit 54 is set to S pole. ｓｆ Based on this, the terminal floor deceleration control is performed.

[0082] Next, a modification of the above embodiment will be described, focusing mainly on the differences from the above embodiment.

[0083] FIG. 8 is a flowchart showing the operation of the position detection device in an elevator according to the first modified example.

[0084] In the first modified example, the overall configuration of the elevator and the configuration of the position detection device are similar to those of the above-described embodiment (FIGS. 1-3 and 5).

[0085] In the flowchart shown in FIG. 8, steps S21, S22, and S23 correspond to steps S11, S12, and S13 in the flowchart shown in FIG. 7, respectively.

[0086] In step S24 (Figure 8), unlike step S14 (Figure 7), the position detection device 5 uses the specific floor determination unit 54 to determine that the specific floor on which the elevator 20 is located is a non-stop floor.

[0087] In the first modified example, in the data configurations shown in FIGS. 4 and 6, "end floors" and "intermediate floors" are changed to "non-stop floors" and "stop floors," respectively.

[0088] According to the first modification, the elevator control device 1 determines whether the specific floor signal S ｓｆ Based on this, operation control (for example, controlled operation control) can be performed taking into account non-stop floors.

[0089] The non-stop floor is a specific floor that the car 20 passes through without stopping during normal operation of the car 20. For example, a floor included in an express zone is a non-stop floor.

[0090] In the first variant, as in the above-described embodiment, the position detection device 5 may determine in step S23 whether the polarity of the magnetic pole of the object to be detected 3 is a north pole, or may determine that the elevator car 20 is located at a stopping floor depending on the determination result in step S23.

[0091] FIG. 9 shows an example of the positional relationship in the height direction between the object to be detected 3 and the magnetic pole detector 4 in an elevator according to a second modified example.

[0092] In the second modified example, the overall configuration of the elevator, the configuration and operation of the position detection device, and the data configuration are the same as those in the above-described embodiment (FIGS. 1, 2, 4-7).

[0093] As shown in FIG. 9, in the second modified example, unlike the embodiment described above (FIG. 3), the north pole detector 41 and the south pole detector 42 are arranged on the left and right in the horizontal direction.

[0094] 9, there is no magnetic field at the position of the magnetic pole detector 4 indicated by the solid line, and therefore the N pole detector 41 and the S pole detector 42 do not output a magnetic pole detection signal. In other words, the magnetic pole detector 4 does not detect either the N pole or the S pole.

[0095] When the magnetic pole detector 4 (solid line) moves in the direction of arrow D as the car 20 (FIG. 1) descends, both the N-pole detection unit 41 and the S-pole detection unit 42 face the object to be detected 3. Because the polarity of the object to be detected 3 is the N-pole, the S-pole detection unit 42 continues to not output a magnetic pole detection signal, but the N-pole detection unit 41 outputs a magnetic pole detection signal. In other words, the magnetic pole detector 4 detects the N-pole.

[0096] 3, there is no magnetic field at the position of the magnetic pole detector 4 indicated by the two-dot chain line, and therefore the north pole detector 41 and the south pole detector 42 do not output a magnetic pole detection signal. In other words, the magnetic pole detector 4 does not detect either the north pole or the south pole.

[0097] When the magnetic pole detector 4 (two-dot chain line) moves in the direction of arrow U as the car 20 (FIG. 1) rises, both the N-pole detecting unit 41 and the S-pole detecting unit 42 face the object to be detected 3. Because the polarity of the object to be detected 3 is N-pole, the N-pole detecting unit 41 outputs a magnetic pole detection signal. In other words, the magnetic pole detector 4 detects the N-pole.

[0098] 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 each embodiment with other configurations.

[0099] For example, in the magnetic pole detector 4, a two-output Hall IC for detecting both poles may be applied, and the N pole detecting section 41 and the S pole detecting section 42 may be configured as a single Hall IC.

[0100] The magnetic pole detector 4 is not limited to a Hall IC, and various magnetic sensors can be used.

[0101] The elevator may be a so-called machine room-less elevator in which the hoisting machine and the control device are installed in the hoistway.

[0102] REFERENCE SIGNS LIST 1 Elevator control device, 2 Movement detector, 3 Object to be detected, 4 Magnetic pole detector, 5 Position detection device, 9 Sheave, 10 Deflector, 20 Cage, 21 Main rope, 22 Counterweight, 23 Landing door, 24 Cage door, 30, 31 Buffer, 41 N pole detection unit, 42 S pole detection unit, 51 Displacement detection unit, 52 Cage position detection unit, 53 Polarity determination unit, 54 Specific floor determination unit, 55 Absolute position detection unit, 56 Specific floor and absolute position memory unit, 70 Tail code, 100 Hoistway, 101 Machine room

Claims

1. An elevator position detection system that detects the position of a car within a hoistway, comprising: a movement detector that outputs a movement detection signal in accordance with the displacement or speed of the car; a plurality of magnetic bodies provided adjacent to a plurality of floors within the hoistway; a magnetic pole detector that is provided in the car and detects the magnetic poles of the plurality of magnetic bodies and outputs a magnetic pole detection signal in accordance with the polarity of the magnetic pole; and a position detection device that detects the position of the car based on the movement detection signal, wherein the position detection device corrects the position of the car detected by the position detection device to a pre-stored absolute position of the car in accordance with the detection of the magnetic pole, the position detection device determines the polarity of the magnetic pole based on the magnetic pole detection signal, and the position detection device determines the specific floor on which the car is located among a plurality of specific floors that make up the plurality of floors based on the polarity determined by the position detection device.

2. An elevator position detection system as described in claim 1, characterized in that the polarity of each of the magnetic poles of the plurality of magnetic bodies is set to either a first polarity or a second polarity depending on the specific floor to which each of the plurality of magnetic bodies is adjacent.

3. An elevator position detection system as described in claim 2, wherein the plurality of specific floors are end floors and intermediate floors, and the polarity of the magnetic pole of the magnetic body located adjacent to the end floor is set to the first polarity, and the polarity of the magnetic pole of the magnetic body located adjacent to the intermediate floor is set to the second polarity.

4. An elevator position detection system as described in claim 3, characterized in that when the position detection device determines that the polarity of the magnetic pole is the first polarity, it determines that the specific floor on which the elevator car is located is the end floor.

5. An elevator position detection system as described in claim 2, wherein the plurality of specific floors are the top floor, an intermediate floor, and the bottom floor, and the polarity of the magnetic pole of the magnetic body located adjacent to the bottom floor is set to the first polarity, and the polarity of the magnetic pole of the magnetic body located adjacent to the intermediate floor or the bottom floor is set to the second polarity.

6. An elevator position detection system as described in claim 5, characterized in that when the position detection device determines that the polarity of the magnetic pole is the first polarity, it determines that the specific floor on which the elevator car is located is the lowest floor.

7. An elevator position detection system as described in claim 2, wherein the plurality of specific floors are non-stop floors and stop floors, the polarity of the magnetic pole of the magnetic body located adjacent to the non-stop floors is set to the first polarity, and the polarity of the magnetic pole of the magnetic body located adjacent to the stop floors is set to the second polarity.

8. An elevator position detection system as described in claim 7, characterized in that when the position detection device determines that the polarity of the magnetic pole is the first polarity, it determines that the specific floor on which the elevator car is located is the stop floor.

9. An elevator position detection system according to claim 1, wherein the magnetic pole detector comprises a first detection unit that detects a first polarity of the magnetic pole, and a second detection unit that detects a second polarity of the magnetic pole.

10. An elevator position detection system according to claim 1, wherein the magnetic body is a permanent magnet.

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