JP2016155623A - Position detection system of elevator and elevator including position detection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a position detection system of an elevator capable of upgrading precision in detecting the position of a car without making the structure complex, and an elevator including the position detection system.SOLUTION: The present invention is a position detection system 12 of an elevator 1 that is disposed in the elevator 1 which ascends or descends in a hoistway 2 of a building and includes a car 4 that moves to a landing 3 on each floor, and that detects the position of the car 4. The position detection system 12 includes a permanent magnet 150 that is disposed on each of the landings 3 and magnetized, a coil 160 that is disposed in the car 4 in the form of a closed circuit, and interlinks with a flux of a magnetic field, which is formed by the permanent magnet 150, when the car 4 approaches the landing 3, a property detector 17 that detects as an analog signal a predetermined property which is susceptible to a change in the magnetic flux of the permanent magnet 150 interlinking with the coil 160, and a position identifier 18 that identifies the position of the car 4 on the basis of the analog signal detected by the property detector 17.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an elevator position detection device that detects the position of a car and an elevator equipped with the position detection device.

  In recent years, in elevators, there is a step between the floor of the car and the floor of the landing when the car arrives at the landing on each floor of the building from the viewpoint of barrier-free and preventing passengers from falling. In order to prevent this, the position of the car is controlled with high accuracy. Therefore, a position detection device used for controlling the position of such a car is required to have more accurate position detection performance.

  Generally, an elevator position detection device includes an arrival position detection device that detects an arrival position of a car installed on each floor of a building, and a movement distance calculation device that calculates a movement distance of the car, and the arrival position detection device The position of the car is detected by adding the moving distance of the car calculated by the moving distance calculating device to the arrival position of the car detected by the above.

  By the way, when installing the arrival position detection device, in order to prevent the level difference between the floor of the car and the floor of the landing when the car arrives at the landing on each floor of the building, It is necessary to perform fine adjustment work of the position detection device, such as adjusting the installation position of the arrival position detection device, and the fine adjustment work of the position detection device is complicated. Therefore, conventionally, with respect to the position detection device, it is expected that such fine adjustment work is not required and that the detection accuracy of the position of the car is high.

  Therefore, a detection unit for detecting the position of the car is installed on the floor of the car and the floor of the landing, respectively, and the position of the car is detected by the detection unit on the basis of these floors. An elevator position detection device that does not require any adjustment work has been proposed as a prior art (see, for example, Patent Documents 1 to 3).

Japanese Patent Publication No. 7-33225 International Publication No. 2009/093317 JP-A-8-225261

  However, in the prior art disclosed in Patent Documents 1 to 3 described above, the output of the detection unit used to determine whether the car has passed a predetermined position is a digital signal output. A quantum error occurs with the output of the digital signal. Therefore, in order to detect the position of the car with high accuracy using the detection unit when the car arrives at the landing, for example, output of digital signals as in a plurality of sensors shown in Patent Document 3 Since it is necessary to compensate for the quantum error in the output of the digital signal by providing a large number of detection points for detecting the above, there is a concern that the structure of the elevator position detection device becomes complicated.

  Alternatively, instead of providing a large number of detection points, for example, when a movement distance calculation device that calculates the movement distance of the car from the rotation angle of the electric motor of the hoist that drives the raising and lowering of the car is provided, Since it is necessary to supplement the detection of the position of the car by the detection unit using the movement distance calculation device, there is a concern that the detection accuracy of the position of the car will be lowered.

  The present invention has been made based on such a situation of the prior art, and an object of the present invention is to provide an elevator position detection device capable of improving the detection accuracy of the position of a car without complicating the structure, and the present invention. It is providing the elevator provided with the position detection apparatus.

  In order to achieve the above object, an elevator position detection apparatus according to the present invention is provided in an elevator having a car that moves up and down in a hoistway of a building and moves to a landing on each floor, and determines the position of the car. In the position detecting device for the elevator to detect, the magnetic material provided at the landing and magnetized, and provided in a closed circuit shape in the car, and formed by the magnetic material when the car approaches the landing. A conductor that is linked to the magnetic flux of the magnetic field, a characteristic detector that detects a predetermined characteristic that is affected by the change in the magnetic flux of the magnetic material that is linked to the conductor, and an analog signal that is detected by the characteristic detector. And a position specifying unit for specifying the position of the car based on the analog signal.

  According to the elevator position detection device of the present invention and the elevator equipped with this position detection device, the detection accuracy of the position of the car can be improved without complicating the structure. Problems, configurations, and effects other than those described above will become apparent from the following description of embodiments.

It is a figure which shows the structure of the elevator provided with the position detection apparatus which concerns on this embodiment. It is a figure which shows the positional relationship of the floor part of the platform shown in FIG. 1, and the floor part of a car. It is a figure explaining the structure of the position detection apparatus which concerns on this embodiment. Relative position of the car relative to the landing when the car according to the present embodiment passes through the landings on each floor of the building, the magnetic flux of the permanent magnet interlinked with the coil, and the time of the induced voltage measured by the voltage detector It is a figure which shows transition. It is a figure which shows the relative position with respect to the boarding place of the car when the car which concerns on this embodiment arrives at the boarding of each floor of a building, and the relationship of the output of the upper stress sensor and the lower stress sensor with respect to this car position. is there.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the position detection apparatus of the elevator which concerns on this invention, and the elevator provided with this position detection apparatus is demonstrated based on figures.

[First Embodiment]
FIG. 1 is a diagram showing a configuration of an elevator provided with a position detection device according to the present embodiment, and FIG. 2 is a diagram showing a positional relationship between a floor portion of a landing and a floor portion of a car in this position detection device.

  1st Embodiment of the position detection apparatus which concerns on this invention is provided in the elevator 1 installed in the building shown in FIG. 1, for example. The elevator 1 moves up and down in a hoistway 2 and moves to a landing 3 on each floor of the building, a main rope 5 with one end attached to the car 4, and the other end of the main rope 5 is attached. And a counterweight 6 suspended in the hoistway 2.

  The elevator 1 is provided in a machine room 7 located above the hoistway 2, and a hoisting machine 8 that drives the car 4 and the counterweight 6, and a sled wheel arranged in the vicinity of the hoisting machine 8. 9, an operation panel 10 provided on the inner wall of the car 4 and operating the car 4, and a control device 11 provided in the machine room 7 for controlling the operation of the elevator 1 including the raising and lowering operation of the car 4. And a position detection device 12 (see FIG. 3) for detecting the position of the car 4.

  The hoisting machine 8 has a drive sheave 8A around which the main rope 5 is wound, an electric motor 8B that rotates the drive sheave 8A, and a brake device (not shown) that brakes the rotation of the drive sheave 8A. ing.

  The control device 11 is connected to the operation panel 10 and the electric motor 8B of the hoisting machine 8, and in accordance with the operation of the operation panel 10 or the operation of a landing button (not shown) installed on the landing 3 4 is moved up and down relative to the counterweight 6. Then, the control device 11 drives the electric motor 8B of the hoisting machine 8 based on the position of the car 4 detected by the position detection device 12, and thereby the floor of the floor portion 3A of the landing 3 shown in FIG. The car 4 is stopped at the landing 3 so that there is no step between the surface and the floor surface of the floor 4A of the car 4.

  FIG. 3 is a diagram illustrating the configuration of the position detection device 12.

  As shown in FIG. 3, the position detection device 12 is provided at the landing 3 on each floor of the building, is provided in a closed circuit shape on the magnetized magnetic body 15 and the car 4, and the car 4 approaches the landing 3. At this time, the conductor 16 interlinked with the magnetic flux formed by the magnetic body 15, the characteristic detector 17 that detects, as an analog signal, a predetermined characteristic that is influenced by a change in the magnetic flux interlinked with the conductor 16, A position specifying unit 18 for specifying the position of the car 4 based on the analog signal detected by the characteristic detecting unit 17 is included.

  For example, the magnetic body 15 is installed on the floor 3A of the landing 3 and is arranged with the north pole directed to the car 4 side so as to face the conductor 16 when the car 4 arrives at the landing 3. It is comprised from the rectangular parallelepiped permanent magnet 150 made. The conductor 16 is installed on the floor 4A of the car 4, for example, and is composed of a coil 160 arranged on the landing 3 side so as to face the permanent magnet 150 when the car 4 arrives at the landing 3. Yes.

  Accordingly, when the car 4 arrives at the landing 3 and the height of the floor surface of the floor 3A of the landing 3 matches the height of the floor surface of the floor 4A of the car 4, the permanent magnet 150 and the coil 160 are That is, when the floor surface of the floor portion 3A of the landing 3 and the floor surface of the floor portion 4A of the car 4 are aligned on the same plane, the floor portion 3A of the landing 3 and the floor portion 4A of the car 4 face each other. They are located near the closest entrance.

  Further, the coil 160 is arranged such that its central axis overlaps with a longitudinal extension line (a straight line connecting the N pole and the S pole) A of the permanent magnet 150. Further, the tip of the coil 160 is air-core for the characteristic detection unit 17 to detect an analog signal, and a magnetic field is generated inside the other part by passing a current through the coil 160. An iron core 161 is inserted. The permanent magnet 150 and the coil 160 have a maximum magnetic flux of the permanent magnet 150 interlinked with the coil 160 in a state where no step is formed between the floor 3A of the landing 3 and the floor 4A of the car 4. It is installed at the position.

  For example, when the car 4 passes through the landing 3, the characteristic detection unit 17 detects an induced voltage generated in the coil 160 due to a change in the magnetic flux of the permanent magnet 150 linked to the coil 160 as the predetermined characteristic described above. When the car detector 4 as a voltage detecting unit and the car 4 arrive at the landing 3, the predetermined characteristic described above is applied to the coil 160 due to a change in the magnetic flux of the permanent magnet 150 linked to the coil 160. A stress detection unit 171 that detects an attractive force from the permanent magnet 150.

  For example, the voltage detector 170 is stored in the control device 11 and connected to a terminal of the coil 160 via a tail cord or the like (not shown). Then, the voltage detector 170 measures the voltage between the terminals of the coil 160 and outputs the measurement result to the position specifying unit 18.

  The stress detection unit 171 has a DC power source 171A as a supply source of a current flowing through the coil 160, and an open / close switch 171B that switches the current flowing from the DC power source 171A to the coil 160 to either energization or shut-off. doing. The DC power source 171A and the open / close switch 171B are stored in the control device 11 as with the voltage detector 170, for example, and the open / close operation of the open / close switch 171B is controlled by the control device 11. Further, the DC power source 171A and the open / close switch 171B are connected to the terminal of the coil 160 via a tail cord or the like (not shown), and constitute a parallel circuit with respect to the voltage detector 170.

  In addition, the stress detection unit 171 is installed above a portion of the iron core 161 inserted into the coil 160 that is closest to the landing 3 side, that is, above the tip of the coil 160 on the landing 3 side. The upper stress sensor 171C for measuring the stress acting on the iron core 161 is installed below the portion closest to the landing 3 side of the iron core 161, that is, below the front end portion on the landing 3 side of the coil 160, and downward with respect to the coil 160. A lower stress sensor 171D for measuring the working stress.

  Therefore, in the stress detector 171, when the car 4 approaches the landing 3, when the open / close switch 171 </ b> B is closed, a current flows from the DC power source 171 </ b> A to the coil 160, thereby generating a magnetic field in the vicinity of the iron core 161 of the coil 160. To do. At this time, an interaction between the magnetic field generated by the iron core 161 of the coil 160 and the magnetic field formed by the permanent magnet 150 in the landing 3 occurs, and an attractive force is generated between the permanent magnet 150 and the coil 160. The upper stress sensor 171C and the lower stress sensor 171D are configured to detect vertical components of stress acting on the coil 160 and the iron core 161 in response to the generated attractive force. The upper stress sensor 171C and the lower stress sensor 171D are connected to the position specifying unit 18 via, for example, a tail cord (not shown), and output the measurement result to the position specifying unit 18. Further, the outputs of the upper stress sensor 171C and the lower stress sensor 171D are opposite to each other with respect to the direction of the stress acting on the coil 160.

  Although not shown, for example, the position specifying unit 18 executes a CPU (Central Processing Unit) that performs various calculations for analyzing the measurement results of the voltage detector 170 and the stress sensors 171C and 171D, and performs a calculation by the CPU. Configuration including hardware including a storage device such as a ROM (Read Only Memory) and a HDD (Hard Disk Drive) for storing a program for storing data, and a RAM (Random Access Memory) serving as a work area when the CPU executes the program Has been.

  Next, when the car 4 passes through the landing 3 on each floor of the building, the processing operation in which the position specifying unit 18 specifies the position of the car 4 will be described in detail along the time series with reference to FIG. To do. In the following description, a floor on which the car 4 passes is referred to as a passing floor for convenience.

  FIG. 4 shows the relative position of the car 4 with respect to the landing 3 when the car 4 passes through the landing 3 on each floor of the building, the magnetic flux (linkage magnetic flux) of the permanent magnet 150 linked to the coil 160, and voltage detection. It is a figure which shows the time transition of the induced voltage measured by the container.

  First, when the car 4 that is rising in the hoistway 2 of the building passes through the landing 3 on the passing floor (for example, the second floor), the control device 11 opens the open / close switch 171B. When the car 4 approaches the landing floor 3 on the passing floor, the magnetic flux from the permanent magnet 150 installed on the floor 3A of the passing floor landing 3 causes the coil 160 installed on the floor 4A of the riding car 4 to move. Interlink.

  As shown in FIG. 4, the magnitude of the magnetic flux interlinked with the coil 160 gradually increases as the car 4 approaches the passing floor, and the height of the floor surface of the floor portion 3A of the landing 3 on the passing floor and the car. It becomes maximum when the height of the floor surface of the 4th floor portion 4A matches. Thereafter, the magnitude of the magnetic flux linked to the coil 160 gradually decreases as the car 4 moves away from the passing floor.

  Here, the induced voltage measured by the voltage detector 170, that is, the induced voltage generated in the coil 160 is proportional to the amount of change in the magnetic flux of the permanent magnet 150 linked to the coil 160, that is, the time derivative of the magnetic flux. When the car 4 approaches the passing floor, the induced voltage has a positive value, and when the car 4 moves away from the passing floor, the induced voltage has a negative value.

  The induced voltage generated in the coil 160 has a value of 0 when the height of the floor surface of the floor portion 3A of the hall 3 on the passing floor coincides with the height of the floor surface of the floor portion 4A of the car 4. The position specifying unit 18 specifies, for example, that the car 4 is in a position where it reaches the landing 3 on the passing floor when the induced voltage measured by the voltage detector 170 becomes zero.

  Next, a processing operation in which the position specifying unit 18 specifies the position of the car 4 when the car 4 arrives at the landing 3 on each floor of the building will be described in detail with reference to FIG. In the following description, a floor on which the car 4 is scheduled to arrive is referred to as a destination floor for convenience.

  FIG. 5 shows the relative position of the car 4 with respect to the landing 3 when the car 4 arrives at the landing 3 on each floor of the building, and the outputs of the upper stress sensor 171C and the lower stress sensor 171D with respect to the position of the car 4. It is a figure which shows a relationship.

  First, when the car 4 arrives at the landing 3 on the destination floor (for example, the second floor), the control device 11 closes the open / close switch 171B. As a result, a current flows from the DC power source 171A to the coil 160, and a magnetic field is generated on the coil 160 side so that the portion of the coil 160 that is closest to the floor 3A of the landing 3 becomes the S pole.

  In this state, as shown in FIG. 5, when the car 4 approaches the landing 3 on the destination floor, the permanent magnet 150 installed on the floor 3A of the landing 3 and the floor 4A of the car 4 are installed. An attractive force due to the magnetic force of the magnetic field acts between the coil 160. Since the distance between the permanent magnet 150 and the coil 160 decreases as the car 4 approaches the destination floor, the attractive force acting between the permanent magnet 150 and the coil 160 increases, and the floor of the platform 3 on the destination floor. It becomes maximum when the height of the floor surface of the portion 3A and the height of the floor surface of the floor portion 4A of the car 4 coincide.

  When attention is paid to the attractive force of the vertical component of the attractive force acting between the permanent magnet 150 and the coil 160, the attractive force of the vertical component is increased as the car 4 approaches the landing 3 on the destination floor. However, when the car 4 moves up and down and the height of the floor surface of the floor portion 3A of the platform 3 on the destination floor coincides with the height of the floor surface of the floor portion 4A of the car 4, the permanent magnet 150 and the coil 160 are increased. Since all the attractive forces acting between the two are horizontal component attractive forces, the vertical component attractive forces are zero.

  On the other hand, since the attractive force acting in the vertical direction among the attractive forces acting between the permanent magnet 150 and the coil 160 acts on the coil 160, the upper stress sensor 171C and the lower stress sensor 171D installed in the coil 160 act on the coil 160. Detect the attractive force of the vertical component. The output of the upper stress sensor 171C and the lower stress sensor 171D to the position specifying unit 18 is such that the car 4 moves up and down after it reaches a maximum or a minimum while the car 4 approaches the landing 3 on the destination floor. When the height of the floor surface of the floor portion 3A of the platform 3 on the destination floor coincides with the height of the floor surface of the floor portion 4A of the car 4, the magnitude relation of the output is switched.

  Therefore, for example, the position specifying unit 18 detects, for example, a point in time when the magnitude relationship between the stresses is switched within a predetermined time after the stresses measured by the upper stress sensor 171C and the lower stress sensor 171D are maximized or minimized. When the value of becomes 0, it is specified that the car 4 is at the position where it arrives at the landing 3 on the destination floor.

  According to the position detection device 12 of the elevator 1 according to the first embodiment of the present invention configured as described above and the elevator 1 including the position detection device 12, it is determined whether the car 4 has passed through the passage floor. The output of each of the stress sensors 171C and 171D used to determine whether or not the voltage detector 170 used in the above and the car 4 has arrived at the destination floor is performed by analog signals. Each characteristic measured by the voltage detector 170 and each of the stress sensors 171C and 171D, that is, the induced voltage generated in the coil 160 and the attractive force from the permanent magnet 150 acting on the coil 160 are continuously changed. It is possible to prevent a quantum error from occurring in the outputs of the detector 170 and the stress sensors 171C and 171D.

  Therefore, the position of the car 4 can be accurately detected by the characteristic detection unit 18 only by applying the structure in which the permanent magnet 150 and the coil 160 are respectively installed in the landing 3 and the car 4 to the elevator 1. As described above, the first embodiment of the present invention can improve the detection accuracy of the position of the car 4 without complicating the structure.

  Further, in the first embodiment of the present invention, the permanent magnet 150 and the coil 160 are arranged at the closest part to the car 4 side and the landing 3 side so that they face each other when the car 4 arrives at the landing 3. Since they are respectively arranged, when the car 4 passes through the hall 3 on the passing floor, the magnetic flux from the permanent magnet 150 on the floor 3A of the hall 3 on the passing floor can be easily linked to the coil 160. . Further, when the car 4 arrives at the landing floor 3 on the destination floor, the attractive force from the permanent magnet 150 can be easily applied to the coil 160. Thereby, the measurement accuracy of the voltage detector 170 and each of the stress sensors 171C and 171D can be increased.

  Further, in the first embodiment of the present invention, the permanent magnet 150 and the coil 160 are installed at predetermined positions on the floor 3A of the landing 3 and the floor 4A of the car 4, respectively. The position of the car 4 can be specified based on the floor surface of each floor 3A, 4A. Therefore, in the specification of the position of the car 4 by the position specifying unit 18, the consistency between each floor surface of the floor 3 </ b> A of the landing 3 and the floor 4 </ b> A of the car 4 and the installation positions of the permanent magnet 150 and the coil 160 is set. Since it is not necessary to perform a fine adjustment operation of the position detection device 12 performed for the purpose, the position detection device 12 can be installed efficiently.

  In the first embodiment of the present invention, when the car 4 passes through the landing 3 on the passing floor, the induced voltage generated in the coil 160 is measured using the voltage detector 170 as the characteristic detector 17. Thus, the change in the magnetic flux of the permanent magnet 150 interlinked with the coil 160 as the car 4 moves up and down can be accurately captured. Thereby, since the position specifying unit 18 can accurately specify the position of the car 4 from the measurement result of the voltage detector 170, excellent reliability can be obtained for the position detecting device 12 of the elevator 1.

  Further, in the first embodiment of the present invention, when the car 4 arrives at the landing floor 3 on the destination floor, the stress acting on the coil 160 is measured using the stress sensors 171C and 171D as the characteristic detection unit 17. Thus, it is possible to accurately capture the characteristics of the attractive force between the permanent magnet 150 and the coil 160 that change as the car 4 approaches the landing 3. Thereby, since the position specific | specification part 18 can pinpoint the position of the cage | basket | car 4 from the measurement result of each stress sensor 171C, 171D with a sufficient precision, the more superior reliability can be obtained with respect to the position detection apparatus 12 of the elevator 1. .

  Further, in the first embodiment of the present invention, the upper stress sensor 171C and the lower stress sensor 171D installed in the coil 160 measure the vertical component of the attractive force acting on the coil 160, so that the car 4 The position specifying unit 18 specifies the position of the car 4 by switching the maximum or minimum output of each of the stress sensors 171C and 171D and the relationship between the output magnitudes of the stress sensors 171C and 171D that are seen when the car arrives at the landing 3 on the destination floor. By using this, the position of the car 4 can be quickly obtained. As a result, the control device 11 can appropriately stop the car 4 at the landing 3 on the destination floor with reference to the position of the car 4 specified by the position specifying unit 18. It is possible to prevent a step from being formed between the floor surface of the car 4 and the floor surface of the floor portion 4 </ b> A of the car 4, so that a user who uses the elevator 1 can smoothly get on and off the car 4. .

[Second Embodiment]
In the second embodiment of the present invention, in addition to the configuration of the first embodiment described above, for example, the control device 11 is measured by the upper stress sensor 171C and the lower stress sensor 171D after the car 4 arrives at the landing 3. The direction of the step formed between the floor surface of the floor portion 3A of the landing 3 and the floor surface of the floor portion 4A of the car 4, and the floor surface of the floor portion 3A of the landing 3 and the car The size of the step formed between the floor surface of the four floor portions 4A is calculated.

  Then, the control device 11 winds up so that the floor surface of the floor portion 3A of the landing 3 and the floor surface of the floor portion 4A of the car 4 are arranged on the same plane according to the calculated direction and size of the step. The electric motor 8B of the machine 8 is driven to perform a micro operation or the like for moving the car 4 with respect to the landing 3 by a minute distance. Other configurations of the second embodiment are the same as the configurations of the first embodiment, and the same or corresponding parts are denoted by the same reference numerals, and redundant description is omitted. Note that the direction of the step formed between the floor surface of the floor portion 3A of the platform 3 and the floor surface of the floor portion 4A of the car 4 is the height of the floor surface of the floor portion 4A of the car 4 3 shows either the direction of increasing or the direction of decreasing with respect to the height of the floor surface of the third floor portion 3A.

  According to the position detection device 12 of the elevator 1 and the elevator 1 including the position detection device 12 according to the second embodiment of the present invention configured as described above, the same functions and effects as those of the first embodiment described above are obtained. In addition, when the user of the elevator 1 gets on and off the car 4, the height of the floor surface of the floor portion 4 </ b> A of the car 4 is relative to the height of the floor surface of the floor portion 3 </ b> A of the landing 3. The control device 11 corrects the position of the car 4 based on the measurement results of the upper stress sensor 171C and the lower stress sensor 171D to change the height of the floor surface 4A of the car 4 to the floor of the landing 3 It can be quickly adjusted to the height of the floor surface of the part 3A. Thereby, after the car 4 arrives at the platform 3 on the destination floor, it is possible to suppress the formation of a step between the floor surface of the floor 3A of the platform 3 and the floor surface of the floor 4A of the car 4. Therefore, high serviceability for the elevator 1 can be ensured.

  In addition, this embodiment mentioned above was described in detail in order to demonstrate this invention easily, and is not necessarily limited to what is provided with all the demonstrated structures. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment.

  Moreover, although this embodiment demonstrated the case where the permanent magnet 150 and the coil 160 were each installed in the floor part 3A of the boarding point 3 and the floor part 4A of the passenger car 4, it does not restrict to this case but the permanent magnet 150 and the coil. 160 may be arranged in portions other than the floor 3A and the floor 4A in the landing 3 and the car 4 as long as they are in a positional relationship facing each other.

  Furthermore, although this embodiment demonstrated the case where the permanent magnet 150 was arrange | positioned in the state in which the north-pole was faced to the car 4 side, it is not restricted to this case, and the permanent magnet 150 is S on the car 4 side. You may arrange | position in the state in which the pole was pointed. In such an arrangement, when the car 4 arrives at the landing 3 on the destination floor, the coil 160 from the DC power source 171A is arranged so that the portion of the coil 160 closest to the floor 3A of the landing 3 becomes the N pole. By causing a current to flow through and generating a magnetic pole on the coil 160 side, the same effects as those of the first and second embodiments described above can be obtained.

  In the present embodiment, the stress detection unit 171 has described the case where the attractive force from the permanent magnet 150 acting on the coil 160 is detected by the change in the magnetic flux of the permanent magnet 150 linked to the coil 160. Not limited to this, the repulsive force from the permanent magnet 150 acting on the coil 160 may be detected by a change in the magnetic flux of the permanent magnet 150 linked to the coil 160. In this case, when the car 4 arrives at the landing 3 on the destination floor, the portion of the coil 160 that is closest to the floor 3A of the landing 3 has the same polarity as the polarity of the permanent magnet 150 on the car 4 side. As described above, by causing a current to flow from the DC power source 171A to the coil 160 to generate a magnetic field on the coil 160 side, the same operational effects as those of the first and second embodiments described above can be obtained.

DESCRIPTION OF SYMBOLS 1 Elevator 3 Platform 3A Floor part 4 Car 4A Floor part 8 Hoisting machine 8A Drive sheave 8B Electric motor 11 Control apparatus 12 Position detection apparatus 15 Magnetic body 16 Conductor 17 Characteristic detection section 18 Position specification section 150 Permanent magnet (magnetic body)
160 Coil (conductor)
161 Iron core 170 Voltage detector (voltage detector)
171 Stress detection unit 171A DC power supply 171B Open / close switch 171C Upper stress sensor 171D Lower stress sensor

Claims (7)

It is installed in an elevator with a car that goes up and down in the hoistway of the building and moves to the landing on each floor,
In the elevator position detecting device for detecting the position of the car,
A magnetic material provided at the landing and magnetized;
A conductor provided in a closed circuit shape in the car, and when the car approaches the landing, a conductor interlinking with the magnetic flux formed by the magnetic material;
A characteristic detection unit that detects a predetermined characteristic that is influenced by a change in the magnetic flux of the magnetic body interlinked with the conductor as an analog signal;
An elevator position detection apparatus comprising: a position specifying unit that specifies the position of the car based on the analog signal detected by the characteristic detection unit. In the elevator position detection device according to claim 1,
The elevator position detecting device according to claim 1, wherein the magnetic body and the conductor are arranged on the car side and the landing side so as to face each other when the car arrives at the landing. In the elevator position detection device according to claim 2,
The position detecting device for an elevator, wherein the magnetic body and the conductor are respectively installed on a floor portion of the landing and a floor portion of the car. In the elevator position detection device according to claim 1,
The characteristic detector is
A voltage detector that detects an induced voltage generated in the conductor due to a change in the magnetic flux of the magnetic material interlinked with the conductor as the predetermined characteristic when the car passes through the landing; Elevator position detection device. In the elevator position detection device according to claim 1,
The characteristic detector is
When the car arrives at the landing, as the predetermined characteristic, a stress for detecting an attractive force or a repulsive force from the magnetic body that has acted on the conductor due to a change in the magnetic flux of the magnetic body linked to the conductor. An elevator position detection apparatus comprising a detection unit. In the elevator position detection device according to claim 5,
The stress detector is
An elevator position detection device comprising a stress sensor for measuring a direction of attraction or repulsion from the magnetic body acting on the conductor and a magnitude of the attraction or repulsion with respect to the direction.   The elevator provided with the position detection apparatus of the elevator of any one of Claim 1 thru | or 6.