JP2008133122A - Elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently feed an elevator car by using a feeder line, and prevent contact of the feeder line. <P>SOLUTION: A current at a predetermined frequency is supplied from a power source device 8 to the feeder line 9. A pickup device 11 is arranged so as to face to the feeder line 9. When the car 1 stops, a distance between the pickup device 11 and the feeder line 9 is short. When the car starts travelling, a servomotor rotates a ball screw. Then, the pickup device 11 moves in a direction apart from the feeder line 9. When the car 1 approaches a destination floor, and stops travelling, the servomotor rotates the ball screw in a direction opposite to the direction in starting the travel. Then, the pickup device 11 moves in a direction closer to the feeder line 9. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an elevator having a power feeding function to a car.

  Conventionally, power is supplied to the elevator car by connecting a car and a power supply device on the building side with a cable called a tail cord and supplying power to the cable. In recent years, various methods for supplying power to a car in a contactless manner instead of using a tail cord have been proposed.

  FIG. 12 is a diagram illustrating a first example of a conventional elevator car feeding device.

  The elevator includes a conductor 104 that is provided in parallel with a moving path 103 of a cage (car) 101 suspended by a lifting / lowering line 102 and that is supplied with a high-frequency current, and is attached to the cage 101 and along the conductor 104. And a coil 105 that moves together with the power receiving circuit 106 that is attached to the coil 101 and connected to the coil 105, and an electromotive force generated in the coil 105 by the magnetic field of the conductor 104 is supplied to the power receiving circuit 106 of the cage 101. Is. Thus, electric power is supplied to the car without using a power supply cable (see Patent Document 1).

FIG. 13 is a diagram illustrating a second example of a conventional elevator car feeding device.
The elevator includes a car 211 that moves up and down in the hoistway 201, a main rope 212 that has one end connected to the car 211, and a balance that is connected to the other end of the main rope 212 and moves up and down in the hoistway 201. A weight 213, a sheave 221 around which an intermediate portion of the main rope 212 is wound, an electric motor 222 that applies a driving force to the sheave 221, and a control device 223 that controls the electric motor 222 are provided.

  The power supply device includes power sources 251 and 252 that are installed on the building side and output a current of a predetermined frequency, and a forward-side power supply line 251a that is connected to the power supply device 251 and extends into the hoistway 201 and a return-side power supply. It includes an electric wire 251b, and an outward power supply line 252a and a return power supply line 252b that are connected to the power supply device 252 and extend in the hoistway 201 in parallel with the outward power supply line 251a and the return power supply line 251b.

  In addition, the power feeding device includes an iron core 261a that is attached to the car 211 via a mounting bracket 261d facing the power feeding lines 251a, 251b, 252a, and 252b, and a coil 261b that is wound around the iron core 261a. An output line 261c connected at one end to the coil 261b, a rectifier circuit 261e connected at the other end of the output line 261c to rectify the electromotive force induced in the coil 261b, and the rectified electromotive force at a predetermined voltage Converter 261g, for example, and a detector 261g for detecting a voltage generated in the coil 261b by electromagnetic induction.

  The inverter 261f is connected to a load 214 including a car illumination (not shown) provided in the car 211, a door drive, a signal power source, and the like. The power supply lines 251a and 251b connected to the power supply device 251 and the power supply lines 252a and 252b connected to the power supply device 252 have the same length, and are located above the hoistway 201 and below the hoistway 201. They are supported by the supports 215a and 215b installed respectively.

In this elevator, even if an abnormality occurs in one power source or power supply line, electric power necessary for car operation is secured via the other power supply device and power supply line (see Patent Document 2).
Japanese Patent Laid-Open No. 9-56088 (page 1-3, FIG. 1-3) JP 2002-338150 A (page 1-5, FIG. 1-4)

In order to realize a method of supplying power to the car without contact, a distance of a predetermined value or more must be provided between the power supply line installed on the hoistway side and the pickup device installed on the car side. The distance between the power supply line and the pickup device corresponds to the distance between the conductor 104 and the coil 105 in the first example of the conventional power supply device described above, and in the second example of the conventional power supply device described above, the power supply line 251a. , 251b, 252a, 252b and the distance between the iron core 261a or the coil 261b.
The reason why a distance greater than a predetermined value must be provided in this portion is as follows. The car may roll while driving. When the power supply line installed on the hoistway side and the pickup device installed on the car side come into contact with each other due to the rolling during the running, a loud sliding sound is generated, which gives passengers an uncomfortable feeling. In addition, the sliding causes wear of the power supply line and the pickup device, and wear powder is generated or the life of the device is remarkably reduced. For this reason, even if the car rolls while traveling, a distance of a predetermined value or more is provided between them so that the feeder line and the pickup device do not come into contact with each other.

  However, when an attempt is made to supply power to the car from the power supply line via the pickup device, the power supply efficiency generally increases as the above-mentioned distance decreases, and conversely, the power supply efficiency decreases as the distance increases. For this reason, as described above, there is a problem that the power supply efficiency is lowered by providing a distance of a predetermined value or more between the power supply line and the pickup device in order to prevent contact. Further, when the distance between the power supply line and the pickup device is shortened in order to increase the power supply efficiency, another problem has arisen in that noise or wear due to contact between the power supply unit, that is, the power supply line and the pickup device, occurs.

  On the other hand, various electric devices are mounted on the car, and among these electric devices, the car door driving device consumes a large amount of electric power. The car door driving device is activated only when the car is stopped, and is not activated while the car is running. In other words, the car requires a large amount of power when stopped, but does not require a large amount of power while traveling.

  Further, as described above, noise and wear due to contact at the power feeding portion do not occur when the car is stopped, but occur during traveling. As described above, when the method of supplying power in a non-contact manner using the power supply line and the pickup device is applied to the elevator, it is not necessary to consider noise and wear due to contact in the power supply unit while the car is stopped. It is necessary to increase the power supply efficiency. Further, a decrease in power supply efficiency is not a major problem during traveling, and it is necessary to prevent noise and wear due to contact at the power supply unit.

  In other words, if the distance between the power supply line and the pickup device is shortened in order to obtain the necessary power while the car is stopped, there is a problem unique to elevators that contact at the power supply part is likely to occur during traveling. It was.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an elevator that can efficiently supply power to a car using a power supply line and prevent contact of the power supply line.

  That is, an elevator according to the present invention includes a power supply device that is installed on the building side and outputs a current having a predetermined frequency, a power supply line that is connected to the power supply device and extends in the hoistway, and a power supply line. A coil that is wound around an iron core provided on the side of the car facing and a converter that converts an electromotive force induced in the coil into a predetermined voltage, and changes a distance between the coil and the feeder line It is characterized by.

  According to the present invention, it is possible to efficiently supply power to an elevator car using a power supply line and to prevent contact of the power supply line.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
First, a first embodiment of the present invention will be described.
FIG. 1 is a diagram illustrating an example of a configuration of an elevator according to the first embodiment of the present invention, and is a diagram illustrating a state in which a car is stopped. FIG. 2 is a side view of the feeder line viewed from the AA direction shown in FIG.

  In FIG. 1, a car 1 is coupled to one end of a rope 2. A counterweight 3 is coupled to the other end of the rope 2. The rope 2 is wound around a hoisting machine sheave 4 provided in the building, and the hoisting machine sheave 4 is driven by a motor 5. The motor 5 is coupled to the control device 7 by a control line 6 and is driven and controlled by a control signal from the control device 7.

  The building is provided with a power supply device 8 for supplying a current having a predetermined frequency, and a power supply line 9 is connected to the power supply device 8. The feeder 9 is arranged in the vertical direction along the hoistway on which the car 1 travels, and is composed of a going side portion 9a, a returning side portion 9b, and a folded portion 9c.

  A power feeding device 10 is mounted on the car 1, and a pickup device 11 that is a part of the power feeding device 10 is attached to the tip of the car. The pickup device 11 faces the power supply line 9 with a predetermined distance.

  Further, a building-side antenna 12 is provided in the building, and is connected to the control device 7 by a transmission line 13. The car 1 is provided with a car-side antenna 14. The building-side antenna 12 and the car-side antenna 14 can transmit and receive radio signals to and from each other, and the control device 7 and the car 1 can exchange various signals via these signals.

FIG. 3 is an enlarged front view of the car 1 in a stopped state. FIG. 4 is a plan view of the power feeding apparatus 10 mounted on the upper portion of the car 1 shown in FIG. 3 as viewed from above.
As shown in FIG. 3, one end of the frame 15 is coupled to the rear portion of the pickup device 11. A screw portion 16 that is a screw hole is provided at the other end portion of the frame body 15, and the screw portion 16 is screwed with a ball screw 17. Ball screw 17 is coupled to servomotor 18.

  The servo motor 18 is coupled to the base 19, and the lower portion of the base 19 is fixed to the car 1. Further, guide devices 20a and 20b, which are wheels, are provided on the lower surface of the frame 15, so that the frame 15 can move in the horizontal direction.

  An electric wire 21 is drawn from the pickup device 11 and connected to the in-car power supply device 22. The car power supply device 22 is connected to a power storage device 23 that is a power storage device. The in-car power supply device 22 supplies the electric power obtained from the electric wires 21 to various electric devices (not shown) mounted on the car 1 such as a door driving device and a lighting device in the car.

  A car control device 24 is further mounted on the car 1, and the car antenna 14, the servo motor 18, the car power supply device 22, and the power storage device 23 are respectively connected by transmission lines 25a, 25b, 2c, and 25d. It is connected and controls the operation of each device by exchanging various signals.

  FIG. 5 is an enlarged perspective view of a portion where the pickup device 11 and the feeder line 9 face each other when the car 1 is stopped. The pickup device 11 includes a substantially E-shaped iron core 26 facing the feeder line 9 and a coil 27 wound around the iron core 26, and an electric wire 21 is connected to the coil 27.

The in-car power supply device 22 functions as a converter that converts the electromotive force induced in the coil 27 into a predetermined voltage.
The iron core 26 and the coil 27 of the pickup device 11 are configured to surround the power supply line going side portion 9a and the return side portion 9b from three directions, respectively. For this reason, a magnetic field fluctuation is efficiently formed in the iron core 26 by a current having a predetermined frequency flowing in the feeder line 9, and thereby, a large electric power is generated in the coil 27 as compared with the traveling time.

Hereinafter, the effect | action concerning the electric power feeding of the elevator of such a structure is demonstrated. First, power supply in a state where the car 1 is stopped will be described.
When the car 1 is stopped, the distances between the feeder line-side portion 9a and the return side portion 9b and the pickup device 11 are shorter than when traveling, but when the car 1 is stopped, the feeder-line side portion 9a. , No noise or wear occurs even if the iron core 26 or the coil 27 contacts the return side portion 9b.

  The electric power generated in the coil 27 is taken into the car power supply device 22 via the electric wire 21. The in-car power supply device 22 supplies power to various electric devices mounted on the car 1 as necessary, or causes the power storage device 23 to store the power. These operations are controlled by the car control device 24.

  When opening / closing a door 1 (not shown) of the car 1, a driving device (not shown) of the door is operated and consumes a large amount of power. However, as described above, magnetic field fluctuations are efficiently formed in the iron core 26. As a result, a large amount of electric power is generated in the coil 27 as compared with that during traveling, so that the electric power does not become insufficient.

  Next, the case where the car 1 starts traveling will be described. When starting the running, the control device 7 issues a drive command to the motor 5 and sends a signal indicating that the drive command has been issued from the building-side antenna 12 to the car-side antenna 14. Upon receiving the drive command, the motor 5 rotates the hoisting sheave 4 and the car 1 starts running.

  On the other hand, a signal transmitted from the building-side antenna 12 is received by the car-side antenna 14 and transmitted to the car control device 24 through the transmission line 25a. The car control device 24 that has received the signal issues a drive command to the servo motor 18, and the servo motor 18 rotates the ball screw 17.

  Since the threaded portion 16 of the frame 15 of the power supply device 10 is screwed to the ball screw 17, the pickup device 11 coupled to the frame 15 and one end thereof is guided by the guide device 20a, It moves toward the direction away from the feeder 9 while being supported by 20b. That is, the car control device 24, the servo motor 18, and the ball screw 17 function as a distance changing unit that changes the distance between the coil 27 of the pickup device 11 and the power supply line 9.

  FIG. 6 shows an enlarged front view of the car 1 in a state where the movement of the pickup device 11 is completed and the car 1 is traveling. FIG. 7 is a plan view of the power feeding device 10 mounted on the upper portion of the car 1 shown in FIG. 6 as viewed from above.

  As shown in FIGS. 6 and 7, it can be seen that when the car 1 is running, the feeder line side portion 9 a and the return side portion 9 b are outside the region surrounded by the iron core 26 and the coil 27. .

  For this reason, the distance between the feeder line-side portion 9a and the return side portion 9b and the pickup device 11 is longer than when the vehicle is stopped, and even if the car 1 travels and rolls, the feeder-line-side portion 9a The iron core 26 and the coil 27 do not come into contact with the side portion 9b, and noise and wear do not occur.

  As described above, since the distance between the feeder line side portion 9a, the return side portion 9b, and the pickup device 11 is longer than that at the time of stopping, the magnetic field fluctuation formed in the iron core 26 is smaller than that at the time of stopping, Along with this, the electric power generated in the coil 27 is also smaller than that at the stop.

  However, when the car 1 is traveling, there is no need to open and close the door, so that the door door drive device that consumes a large amount of power does not operate. For this reason, even if generation | occurrence | production of electric power becomes small, the required electric power of the passenger car 1 does not become insufficient.

Next, the case where the car 1 arrives at the destination floor and stops will be described.
When the car approaches the destination floor and stops traveling, the control device 7 issues a stop command to the motor 5 and sends a signal indicating that the stop command has been issued from the building-side antenna 12 to the car-side antenna 14. The motor 5 that has received the stop command slows the rotational speed of the hoisting machine sheave 4 and eventually the car 1 stops at the destination floor.

  On the other hand, a signal transmitted from the building-side antenna 12 is received by the car-side antenna 14 and transmitted to the car control device 24 through the transmission line 25a. Upon receiving the signal, the car control device 24 issues a drive command to the servo motor 18, and the servo motor 18 rotates the ball screw 17 in the direction opposite to that at the start of traveling.

  Since the threaded portion 16 of the frame 15 of the power supply device 10 is screwed to the ball screw 17, the pickup device 11 coupled to the frame 15 and one end thereof is guided by the guide device 20a, It moves in the direction approaching the feeder 9 while being supported by 20b.

  In the state where the movement of the pickup device 11 is completed and the car 1 is stopped, the positional relationship between the pickup device 11 and the power supply line 9 returns to the state before the start of the car travel as shown in FIGS. It will be.

  Next, a case where a power failure occurs while the car 1 is traveling and current from the power supply device 8 and the feeder line 9 is not supplied will be described. In this case, since the power supply to the motor 5 and the hoisting machine sheave 4 is lost, the car 1 stops. However, since the car 1 is equipped with the power storage device 23, the power stored in the car 1 can be used to perform the same operation as when the car 1 arrives at the destination floor and stops.

  Therefore, even if a power failure occurs while the car 1 is running and the car 1 stops, the pickup device 11 can be moved, and the car 1 returns to the state shown in FIGS. Can do. When the power failure is restored and current is supplied again from the power supply device 8 and the power supply line 9, the power supply device 10 can efficiently supply power to the car 1.

  As described above, the distance between the power supply line 9 and the pickup device 11 is short when the car is stopped and long while the car is running, so that the car 1 can be supplied with power when the car 1 requires a large amount of power. In addition to being able to carry out efficiently, even if the car 1 rolls during running, it is possible to prevent noise and wear due to contact between the feeder 9 and the pickup device 11.

Further, the distance between the feeder 9 and the pickup device 11 may be shortened when the speed of the car is slow, and may be lengthened when the speed is fast.
Further, by using the above-described configuration, the distance between the feeder 9 and the pickup device 11 may be changed in association with the operation of the entrance door of the car 1. That is, the distance between the feeder 9 and the pickup device 11 may be short when the possibility that the door operates is high, and may be long when the possibility is small.

  In addition, using the configuration described above, the distance between the feeder 9 and the pickup device 11 may be changed in association with the operating status of the equipment in the car. That is, the distance between the feeder 9 and the pickup device 11 may be shortened when the power consumed by the devices in the car is large, and may be long when the power is small.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In addition, the structure of the elevator which concerns on this embodiment attaches | subjects the same code | symbol to the structure same as what was shown in FIG. 1, and the overlapping description is abbreviate | omitted.
FIG. 8 is a diagram showing an example of the configuration of the elevator according to the second embodiment of the present invention. FIG. 9 is a side view of the feeder line viewed from the BB direction in FIG.

In this embodiment, a car 51 is provided instead of the car 1 provided in the first embodiment.
FIG. 8 shows a car 51a stopped on the uppermost stop floor, a car 51c stopped on the lowermost stop floor, and a car 51b traveling between them.

  FIG. 10 is an enlarged front view of the car 51a in a stopped state. FIG. 11 is a plan view of the power feeding device 53 mounted on the upper portion of the car 51a shown in FIG. 10 as viewed from above.

  A power supply line 52 is connected to the power supply device 8 installed in the building instead of the power supply line 9 provided in the first embodiment. The feeder line 52 is arranged vertically along the hoistway on which the car 51 travels. When the car 51 is stopped on the stop floor, the power line 52 approaches the car 51 side and the car 51 is running. Then, it is partly refracted and set away from the car 51.

  The car 51 includes a power feeding device 53 instead of the power feeding device 10 provided in the first embodiment, and a pickup device 11 that is a part of the power feeding device 53 is attached to the tip of the power feeding device 53. ing. The details of the pickup device 11 are the same as those described in the first embodiment, and are given the same numbers. However, the rear portion of the pickup device 11 is fixed to the car 51 and is directly coupled to a base 54 that is a part of the power feeding device 53.

  Similar to the first embodiment, an electric wire 21 is drawn from the pickup device 11 and connected to the in-car power supply device 22. The car power supply device 22 is connected to the power storage device 23. The in-car power supply device 22 supplies power to various electric devices mounted on the car 1, such as a door driving device and a lighting device in the car.

  A car control device 24 is further mounted on the car 51, and is connected to the car-side antenna 14, the car power supply device 22, and the power storage device 23 by transmission lines 25a, 25b, 25c, and 25d. By controlling this, the operation of each device is controlled.

  As shown in FIG. 3, the servo motor 18 and the transmission line 25b connected to the servo motor 18 are necessary in the first embodiment, but the servo motor 18 does not need to be provided in the second embodiment. This transmission line is unnecessary. In the second embodiment, since the servo motor 18 is unnecessary, it is not necessary to provide the ball screw 17 and the frame body 15 provided in the first embodiment.

Hereinafter, the effect | action concerning the electric power feeding of the elevator of such a structure is demonstrated.
In the car 51a in a state of being stopped at the uppermost stop floor, the iron core 26 and the coil 27 of the pickup device 11 surround the feeder line side 52a and the return side 52b from three directions, respectively. . For this reason, a magnetic field fluctuation is efficiently formed in the iron core 26 by a current having a predetermined frequency flowing through the feeder line 52, thereby generating a large amount of electric power in the coil 27 compared to when traveling.

When the car 51 is stopped, the distance between the power supply line-side portion 52a and the return side portion 52b and the pickup device 11 is shorter than that during traveling, but the car 51a is stopped. Even if the iron core 26 and the coil 27 come into contact with 52a and the return side part 52b, noise and wear do not occur.
The electric power generated in the coil 27 is taken into the in-car power supply device 22 via the electric wire 21, and the in-car power supply device 22 supplies power to various electric devices mounted on the car 51 as necessary. The power is supplied or stored in the power storage device 23. These operations are controlled by the car control device 24.

  When opening and closing the entrance door (not shown) of the car 51, the drive device for the entrance door operates and consumes a large amount of power, but as described above, the magnetic flux variation is efficiently formed in the iron core 26. As a result, a large amount of electric power is generated in the coil 27 as compared to when traveling, so that the necessary electric power does not become insufficient.

  When the car 51 starts traveling toward the lowest floor and the position of the car 51 moves to the position of the car 51b shown in FIG. 8, the feeder line 52 is installed so as to be separated from the car 51. As a result, the feeder-side-going side portion 52a and the return-side portion 52b come out of the region surrounded by the iron core 26 and the coil 27.

  For this reason, the distances between the feeder line-side portion 52a and the return side portion 52b and the pickup device 11 become long, and even if the car 51 travels and rolls, the feeder line-side portion 52a and the return side portion 52b are iron cores. No contact with the coil 26 or the coil 27, and no noise or wear occurs.

  As described above, since the distance between the feeder line-side portion 52a, the return side portion 52b, and the pickup device 11 is longer than that at the time of stopping, the magnetic field variation formed in the iron core 26 is smaller than that at the time of stopping, Along with this, the electric power generated in the coil 27 is also smaller than that at the stop.

  However, when the car 51 is running, there is no need to open and close the door, so that the door drive device that consumes a large amount of power does not operate. The necessary electric power for the car 51 will not be insufficient.

  When the car 51 arrives at the lowest destination floor and stops and the position of the car 51 moves to the position of the car 51c shown in FIG. 8, the feeder line 52 is installed so as to approach the car 51 side. Therefore, the positional relationship between the feeder line 52 and the pickup device 11 is restored when the car 51 is stopped at the top as shown in FIG.

  Thus, in the elevator according to the second embodiment of the present invention, when the car is at the stop position, the distance between the power supply line and the pickup device 11 is short, and the car is at the travel position. Since the feeder line is partially refracted and installed so that the distance between the feeder line and the pickup device 11 becomes longer, as in the first embodiment, when the car requires a large amount of power, Power feeding can be performed efficiently, and noise and wear due to contact between the power feeding line and the pickup device 11 can be prevented even when the car rolls during traveling.

  The present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be omitted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

The figure which shows an example of a structure of the elevator according to the 1st Embodiment of this invention. The figure which looked at the power supply device and feeder of the elevator according to the 1st Embodiment of this invention from the AA direction shown in FIG. The figure which shows the structure of the various apparatuses of the passenger car in the stop of the elevator according to the 1st Embodiment of this invention. The figure which looked at the electric power feeder of the car in the stop of the elevator according to the 1st Embodiment of this invention from upper direction. FIG. 2 is an enlarged view of a feeding device and a feeding line for an elevator car according to the first embodiment of the present invention. The figure which shows the structure of the various apparatuses of the car in the driving | running | working of the elevator according to the 1st Embodiment of this invention. The figure which looked at the electric power feeder of the car in the driving | running | working of the elevator according to the 1st Embodiment of this invention from upper direction. The figure which shows an example of a structure of the elevator according to the 2nd Embodiment of this invention. The figure which looked at the power supply device and feeder of an elevator according to the 2nd Embodiment of this invention from the BB direction shown in FIG. The figure which shows the structure of the various apparatuses of the elevator car according to the 2nd Embodiment of this invention. The figure which looked at the electric power feeder of the elevator car according to the 2nd Embodiment of this invention from upper direction. The figure which shows the 1st example of the electric power feeder of the conventional elevator car. The figure which shows the 2nd example of the electric power feeder of the conventional elevator car.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,51 ... Riding car, 2 ... Rope, 3 ... Balance weight, 4 ... Hoisting machine sheave, 5 ... Motor, 6 ... Control line, 7 ... Control device, 8, 251, 252 ... Power supply device, 9, 52 ... Feeding line, 9a, 52a ... Feeding line side, 9b, 52b ... Feeding line return side, 9c, 52c ... Feeding line folding part, 10,53 ... Feeding device, 11 ... Pickup device, 12 ... Building side antenna , 13 ... Transmission line, 14 ... Car side antenna, 15 ... Frame, 16 ... Screw part, 17 ... Ball screw, 18 ... Servo motor, 19, 54 ... Base, 20a, 20b ... Guide device, 21 ... Electric wire, 22 ... Power supply device in the car, 23 ... Power storage device, 24 ... Control device, 25a, 25b, 25c, 25d ... Transmission line, 26, 261a ... Iron core, 27, 105, 261b ... Coil, 101 ... Cage, 102 ... Lifting rope 103 Route: 104 ... Conductor, 106 ... Power receiving circuit, 201 ... Hoistway, 212 ... Main rope, 214 ... Load, 215a, 215b ... Support, 221 ... Sheave, 222 ... Electric motor, 223 ... Controller, 251a, 252a ... Outward Side feed lines, 251b, 252b ... return-side feed lines, 261d ... metal fittings, 261c ... output lines, 261e ... rectifier circuits, 261f ... inverters, 261g ... detectors.

Claims (12)

A power supply device installed on the building side and outputting a current of a predetermined frequency;
A feeder line connected to the power supply device and disposed in a hoistway;
A coil wound around an iron core provided on the side of the car facing the feeder line;
A converter for converting an electromotive force induced in the coil into a predetermined voltage;
An elevator comprising distance changing means for changing a distance between the coil and the power supply line. The distance changing means is
The elevator according to claim 1, wherein a distance between the coil and the feeder line is changed by moving the coil. The distance changing means is
The elevator according to claim 1, wherein a distance between the coil and the feeder line is changed according to a driving condition of a car. The distance changing means is
The distance between the coil and the power supply line is shortened when the car is stopped, and the distance between the coil and the power supply line is lengthened when the car is running. The elevator according to claim 3. The distance changing means is
When the speed of the car is slow, the distance between the coil and the feed line is shortened, and when the speed of the car is fast, the distance between the coil and the feed line is lengthened. The elevator according to claim 3. The distance changing means is
The elevator according to claim 1, wherein a distance between the coil and the power supply line is changed according to an opening / closing state of a car door. The distance changing means is
When the door of the car is opened and closed, the distance between the coil and the power supply line is shortened. When the door of the car is not open and closed, the distance between the coil and the power supply line is increased. The elevator according to claim 6. The distance changing means is
The elevator according to claim 1, wherein a distance between the coil and the power supply line is changed according to an operating state of a car device. The distance changing means is
When the power consumption of the car equipment is high, the distance between the coil and the power supply line is shortened. When the power consumption of the car equipment is low, the distance between the coil and the power supply line is short. The elevator according to claim 8, wherein the elevator is lengthened. A power supply device installed on the building side and outputting a current of a predetermined frequency;
A feeder line connected to the power supply device and disposed in a hoistway;
A coil wound around an iron core provided on the side of the car facing the feeder line;
A converter for converting an electromotive force induced in the coil into a predetermined voltage;
The elevator characterized in that the feed line is arranged in the hoistway so that the distance between the coil and the feed line varies depending on the height of the hoistway. The feed line is installed so that the distance between the coil and the feed line is shortened at the stop position of the car, and the distance between the coil and the feed line is lengthened at a position other than the stop position. The elevator according to claim 10, wherein the feeder is installed.   The elevator according to any one of claims 1 and 10, further comprising: a storage device that stores electric power obtained by conversion by the converter in the car.

Images