JPH10225022A - Non-contact electric power supplying device for moving body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to surely electric supply power to a moving body at every loading point by mounting a coil for receiving power at the moving body side at the end of an end member of a supporting arm. SOLUTION: A coil 11 for receiving power mounted at end members 9c of a front and a rear supporting arm 9, 9 abuts against a magnetic body 26 of a coil 15 for supplying power of a power supplying circuit 10 and then is plunged in. When the plunge of the coil 11 for receiving power is detected by a plunge detecting sensor 9d, an output switch starts working to allow AC current from a source of AC to flow in the electric power supplying circuit 10. At the same time, the extension of each of the supporting arms 9 stops. Then, the coil 11 for receiving power mounted on the end members 9c of the supporting arms 9, 9 receives from the coil 15 for supplying power induced electromotive force appearing between the coil 11 for receiving power and the coil 15 for supplying power in a non-contact state with the coil 15 for supplying power. The received power is then supplied to an electric circuit mounted on a vehicle through a stabilized power supply. By this method, power can be surely supplied at every loading point.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact power supply for a moving body, such as an electric transport vehicle, which moves between racks for storing luggage in a loading / unloading warehouse, etc. It concerns the device.

[0002]

2. Description of the Related Art As one conventional example of a power supply apparatus for supplying electric power necessary for operating a moving body, a battery is mounted on the moving body.
Power is supplied from this battery. In this case, since all the electric power is supplied from the battery, its capacity is as large as several hundred Ah, and the battery occupies most of the vehicle body volume. If the moving object is a forklift, placing a battery at the rear of the vehicle body is useful as a counterweight during cargo handling work, but it is not necessary to use a general counterweight that places a load on the vehicle weight center and transports it. In an electric carrier, a small turning radius and a low cargo handling height are required, and the vehicle body must be compact. Therefore, there is a problem in mounting this large-capacity battery. In view of this, there is an operation in which this battery capacity is kept as small as possible to increase the charging frequency. However, the operation rate is high, and it is not suitable for continuous use.

In order to solve the problem of the conventional power supply apparatus for a mobile body, various means for externally supplying power have been proposed as follows.

(1) Japanese Laid-Open Utility Model Publication No. 52-35703 discloses a "light emitting device for measuring instrument pointer" that supplies power to a mobile body from outside in a non-contact manner. This is composed of a primary coil on the external fixed side and a secondary coil on the moving side.

(2) Japanese Unexamined Patent Publication No. 3-289302 discloses a "method and apparatus for supplying power to a moving body" which includes means for installing a coil at a position where the moving body stops and supplying power thereto in a non-contact manner. Have been. This is a non-contact power transmission between the coils, and in this embodiment, a stop position is used for a station for loading and unloading articles.

(3) Japanese Patent Application Laid-Open No. 5-328508 discloses a "contactless power supply facility for a moving body" which includes means for installing a power feeding line along a moving body guiding guide path of a work station. It is shown. In this method, a battery mounted on a moving body is charged during traveling, and electric power is supplied from a track to a coil in a non-contact manner.

(4) In the "contactless power supply equipment for moving objects" disclosed in Japanese Patent Application Laid-Open No. 5-336606, a magnetic member is provided at a predetermined position on the traveling path of the moving object, and the power supply at that position is increased. Means of doing so are shown. As an example of the predetermined position, a station for performing a transfer operation such as a lift-up is mentioned.

[0008]

As in the above-mentioned prior art (2), in the prior art in which the traveling is stopped at a loading point or the like and the electric power is transmitted in a non-contact manner between the coils, the cargo is not handled. It is not necessary to set several feeding positions like a station. If there are about 1,000 pallet loading points in a room such as a pallet rack, prepare a core wound with a coil around each loading point. Doing so has the problem of being too costly.

Further, in the conventional technology for transmitting electric power between the line and the coil in a non-contact manner as in the above-mentioned conventional technology (1), when the vehicle travels on an orbit, a ground-side line and a moving vehicle are not used. Although the clearance with the coil on the body side can be made constant, it is very difficult for a moving body that travels between racks without a track to travel while keeping the clearance constant. Conversely, if the design is made with a margin so as to make this possible, the protrusion of the power supply portion to the passage between the racks becomes large, and wasteful space is generated.

On the other hand, the above-mentioned conventional techniques (3),
In (4), the moving body moves along a fixed route along the guide path so that the power receiving coil of the moving body does not deviate from the power supply induction line. )), A guide line is provided over the entire length of the work platform installed along the guide path in the guide path direction, and basically, power is supplied for as long as possible during the movement of the moving body. In what
An inductive wire for supplying power is required for a long time, which is expensive. In addition, a guide path facility is required, and the degree of freedom of the moving body is reduced accordingly.

In the prior art (4), a magnetic member for supplying power is provided for each station for transferring a load, and each time the moving body stops to transfer a load. Power is supplied, but in this conventional technique, a guide path is used similarly to the above (3), and the degree of freedom of the moving body is small, and the magnetic member for power supply is provided on a traveling road surface. In addition to this, it becomes a permanent facility, and when the number increases, the cost increases almost directly.

[0012] In any of the above-mentioned conventional techniques, there is a very large number of cargo handling points, and there is no description about supplying power to a trackless moving body at each of the cargo handling points.

The present invention has been made in view of the above, and has been described above in a moving object which has a very large number of cargo handling points and has a large degree of freedom with respect to a running path without a track. It is an object of the present invention to provide a mobile non-contact power supply device capable of reliably supplying power.

[0014]

In order to achieve the above object, a non-contact power supply device for a moving body according to the present invention is a moving body that moves along a pallet rack, and
One of the pallet racks is used as a fall prevention mechanism during cargo handling.
A non-contact power is supplied from a power supply coil of a power supply circuit provided on the ground side to a movable body provided with an extendable support arm in contact with an end surface of the two rack beams via a power receiving coil provided on the movable body side. In a non-contact power supply device of a moving body,
The power supply coil of the power supply circuit on the ground side is disposed at the end surface of the rack beam where the distal end member of the support arm abuts, and at each position where the distal end surface of the support arm abuts during loading / unloading of the movable body with respect to the pallet rack, The power receiving coil on the moving body side is provided at the tip of the tip member of the support arm. The moving body moves along the pallet rack and stops at the loading position to remove the load on the rack beam. When the support arm is extended to prevent it from overturning, the power receiving coil provided on the tip member of the supporting arm approaches the power feeding coil of the power supply circuit provided on the rack beam in a non-contact state and the power feeding coil side. , The dielectric electromotive force generated during this time is received in a non-contact state.

Therefore, according to this configuration, power can be received from the pallet rack side in accordance with the extension operation of the support arm every time the moving body is unloaded as described above, so that there are a large number of loading points. In addition, power can be reliably supplied at each of the above-mentioned cargo handling points to a moving body that is trackless and has a large degree of freedom with respect to the traveling path.

In the above configuration, the power supply coil of the power supply circuit is formed by partially widening the interval between two reciprocating conductors, so that the power supply coil is compared with a configuration in which the coil is wound around an iron core. As a result, the number of parts can be reduced, the configuration can be simplified, and installation work on site can be greatly facilitated.

Further, the transmission efficiency of the power feeding coil is improved by disposing a magnetic material serving as the core of the power feeding coil between the widened conductors of the power feeding coil in which the interval between the conductors is partially widened. can do.

The power supply circuit is configured by connecting a plurality of power supply modules each having at least one power supply coil embedded in a non-magnetic material, and each of the power supply modules is fixed to a rack beam. A power supply circuit of any length can be configured using multiple power supply modules,
Applicable to pallet racks of various lengths. This greatly contributes to stabilizing the quality of the power supply circuit and greatly simplifying the on-site assembly work.

In addition, since the variable impedance element is interposed between the power supply circuit and the AC power supply, a problem that occurs when the length of the power supply circuit or the power supply point changes as described above, Can be solved by changing the load impedance of the device, and preventing resonance at the used frequency (for example, 10 KHz).

Further, the power supply circuit and the AC power supply are connected via an output switch, and the power receiving coil is provided at the distal end member of the support arm so as to be freely retractable and protruded so as to be spring-biased. Along with this, an immersion detection sensor that detects that the power receiving coil has come into contact with the power supply unit and is in an immersive state capable of receiving power is provided, and the immersion detection sensor and the output switch are connected via a controller, a wireless communication device, and the like.
Since the output switch was turned on by the detection signal of the immersion detection sensor, the moving body stopped at the cargo handling position, the support arm was extended, and the tip member of the movable body was in contact with the power supply circuit side. At this time, the power receiving coil faces the power feeding coil and is immersed in the distal end member of the support arm.
This operation is detected by the immersion detection sensor, the output switch is turned on by the detection signal, and an alternating current flows through the power supply circuit only when the power receiving coil is facing.

Therefore, power can be supplied to the power supply circuit only when the power supply operation is performed, and power can be saved.

Further, a plurality of pallet racks are used, and each power supply circuit of each pallet rack is connected to an AC power supply via a selector switch, and the selector switch is connected to an immersion detection sensor, and a controller, a wireless communication device and the like. Through the connection signal is turned on by the detection signal of the immersion detection sensor, the power supply circuit that is in contact with the support arm having the immersion detection sensor, even when using a plurality of pallet racks, It is possible to energize only the power supply circuit of the pallet rack performing the cargo handling operation. This can save power when a plurality of pallet racks are used, and can reduce the load on the AC power supply.

Further, by selectively connecting a power receiving coil via a changeover switch to a battery of a vehicle-mounted electric circuit in which a traveling motor and a cargo handling motor are connected in parallel to a battery of the moving body, and thereby receiving power. The cargo handling motor can be driven by the electric power received by the coil for use, and the load on the battery can be greatly reduced. The cargo handling motor has a larger load than the traveling motor,
The ability to operate the cargo handling motor with external electric power can reduce the battery capacity. In addition, when the moving body is at rest, charging the battery can extend the life of the battery and extend the traveling time. In addition, in the case of a moving body that operates in a freezer warehouse, it is necessary to heat electronic equipment or oil and stand by, but in such a case, the power for that purpose is replaced with a battery and the power receiving coil is used. External power from
Battery consumption can be prevented. When used with a plurality of mobile racks, a power supply conductor is provided together with a crossover cable of the mobile rack.

[0024]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows the interior of a storage warehouse. In the figure, reference numeral 1 denotes a pallet rack, and 2 denotes an electric carrier that travels along a passage provided between the pallet racks 1 and 2. The pallet rack 1 has a plurality of, for example, three-stage rack beams 1.
a, 1b, 1c, and each rack beam 1a, 1b, 1
The pallet 4 on which the load 3 is loaded is capped on the support tables 5 and 5 at a predetermined interval.

The electric carrier 2 has masts 6a and 6b on both sides in the traveling direction.
An elevator 7 is provided between the masts 6a and 6b so as to be moved up and down. And this elevator 7
In addition, a loading device 8 for loading in a direction perpendicular to the traveling direction is provided. The unloading device 8 is provided with two telescopic forks (not shown) so as to be able to protrude and retreat in a direction perpendicular to the traveling direction. Beams 1a, 1b, 1c
The pedestals 5 are inserted into the lower side of the pallet 4 which has been housed with the pedestals 5, 5, and the elevating platform 7 is slightly lifted up to shorten it.
By moving upward, the load 3 is picked up by the electric transport vehicle 2 together with the pallet 4.

Support arms 9 are provided on both sides of the front and rear masts 6a and 6b of the electric carrier 2 in a horizontal direction. Each of the support arms 9 includes a support cylinder 9a,
A telescoping member 9b that is made telescopic with respect to the support cylinder 9a
And a support member 9c fixed to the tip of the elastic member 9b. And the above-mentioned elastic member 9b is used as a support cylinder 9a.
The telescopic operation is performed by a telescopic device (not shown) such as a hydraulic cylinder provided in the inside. Each of the support arms 9 has a height in the middle of the pallet rack 1 described above, for example, a height facing the second rack beam 1b, and the electric carrier 2 travels along the pallet rack 1, When the lateral support arms 9, 9 are extended, their respective support members 9C, 9c come into contact with the end face of the rack beam 1b.

The electric guided vehicle 2 is an unmanned vehicle that is wirelessly operated. The electric vehicle 2 is operated by a vehicle controller 34 in accordance with a predetermined program, travels along a path between the pallet racks 1 and stops at a predetermined position. The elevating platform 7 rises to a predetermined rack beam height, takes up a predetermined pallet 4 with a loading device 8, lowers it again, and then travels to its unloading position. When the electric transport vehicle 2 stops at the loading position as described above, the two front and rear support arms 9, 9 on the side facing the pallet rack on the loading side extend, and the leading end member 9c thereof extends. , 9c abut on the rack beam 1b so as to serve as a hook bar during loading, that is, to prevent overturning.

A power supply circuit 10 is provided on the end face of the rack beam 1b of the second stage from the bottom where the tip of the support arm 9 of the electric carrier 2 is opposed, and the four support arms 9 of the electric carrier 2 are provided.
Each of the end members 9c is provided with a power receiving coil 11 facing the power supply circuit 10.

The power supply circuit 10 is configured as shown in FIG. 2 and includes two reciprocating conductors 14a and 14b connected to an AC power supply 12 via an output switch 13. The power supply circuit 10 has a longitudinal direction. At predetermined intervals, that is, at the loading position (loading position) of each pallet 4 placed on the rack beam 1b, the support arms 9, 9 in front of and behind the electric carrier 2 are set.
A power supply coil 15 in which the two conductors 14a and 14b are partially separated from each other by a coil distance d is formed at the position S. The power supply circuit 10 includes an impedance variable element 16
Is interposed.

On the other hand, the power receiving coil 11 is connected to a vehicle-mounted electric circuit 1 of the electric carrier 2 through a stabilized power source 17 as shown in FIG.
8 is connected. The in-vehicle electric circuit 18 includes a traveling motor 20, a cargo handling motor 21, and a main switch 22 connected in parallel to a battery 19. The stabilizing power supply 17 is connected to both motors 20 and 2.
1 are connected via a changeover switch 23 to the circuit between them. A switch 23a is turned on when the cargo handling motor 21 is driven by the battery 19.

A specific embodiment of the power supply circuit 10 and the power receiving coil 11 will be described with reference to FIGS.
The power supply circuit 10 has a configuration in which a power supply module 24 in which the rack beam 1b is divided into a plurality of pieces in the longitudinal direction is connected as necessary.

As shown in FIGS. 4 and 7, the power supply module 24 has a base 25 made of a non-magnetic material such as plastic or aluminum and has two conductors 14a and 14b provided therein. The power supply coil 15 is separated at a predetermined interval d in the middle part, and this part is exposed. An E-shaped magnetic body (ferrite) 26 is embedded in the power supply coil 15, and the conductive wires 14 a and 14 b are inserted into grooves of the magnetic body 26. As shown in FIGS. 4 and 5, connection terminals 14c and 14d are provided at both ends of each of the conductors 14a and 14b, and each of the conductors 14a and 14b is provided for each adjacent power supply module 24.
Can be detachably connected using a screw 14e and a nut 14f. Each power supply module 24 has its base 25 fixed to the rack beam 1b with a screw 27.

As shown in FIGS. 6 and 7, the power receiving coil 11 has an intermediate portion (core) of an E-shaped magnetic material (ferrite) 28.
It is wound around. The magnetic body 28 is configured to freely protrude and retract from the distal end member 9c of the support arm 9, and protrudes from the distal end of the magnetic body 28 by a spring 29 over a range of 2 to 3 mm in a natural state. The tip member 9c of the support arm 9 is made of a non-magnetic material such as plastic. The power receiving coil 11 includes a magnetic body 28 provided in the power supply circuit 10.
And an immersion detecting sensor 9 which detects that immersion is performed until the end surface of the distal end member 9c of the support arm 9 is flush with the distal end member 9c.
d is provided. When the immersion detection sensor 9d is turned on, the electric vehicle 2 wirelessly notifies the ground-side equipment of the output switch 1 of the power supply circuit 10 shown in FIG.
3 is turned on.

In the above configuration, the electric transport vehicle 2 is run by the running motor 20 driven by the electric power of the battery 19. The power to the actuator that operates during a loading operation or the like is obtained from a loading motor 21 that is also driven by the electric power of the battery 19. And electric carrier 2
Stops to unload the pallet 4 at a predetermined position, firstly, the front and rear support arms 9, 9 on the pallet rack 1 side on which the pallet 4 is mounted extend, and the tip members 9c, 9c abuts on the base 25 of the power supply circuit 10 fixed to the rack beam 1a of the pallet rack 1, and the rack bar 1a is acted as a pin through the base 25 of the power supply circuit 10.

At this time, the power receiving coil 11 provided on the front end member 9c of each of the front and rear support arms 9, 9 comes into contact with the magnetic body 26 of the power feeding coil 15 of the power feeding circuit 10 and is immersed. The detection is performed by the sensor 9 d, and the output switch 13 is operated by the detection signal, so that an AC current from the AC power supply 12 flows through the power supply circuit 10. At the same time, the extension operation of each support arm 9 stops.

In this state, the tip members 9 of the two support arms 9 are
The power receiving coil 11 provided in c is supplied to the power feeding coil 15 in a non-contact manner, and the dielectric electromotive force generated between the power feeding coil 15 and the power receiving coil 11 is received. The received power is supplied to the vehicle-mounted electric circuit 1 via the stabilized power supply 17.
8 is supplied. At this time, when the changeover switch 23b is turned off and the changeover switch 23 is switched to the cargo handling side, the cargo handling motor 21 can be driven by the received external power. In addition, when the traveling motor 20 is stopped, the external power can be charged in the battery 19 by turning on the main switch 22 and switching the changeover switch 23 to the charging side.

In the above embodiment, the case where one pallet rack 1 is used has been described. However, a plurality of pallet racks 1 are used in parallel as shown in FIG. Is used. In this case, as shown in FIG. 8, the power supply circuits 10, 10,... Of the pallet racks 1, 1,.
Are connected to the selector switch 31 via 6, 16,.... The AC power supply 12 which is turned on and off by the output switch 13 is connected to the selector switch 31. The output switch 13 and the selector switch 3
1 is controlled by the ground controller 32. The terrestrial controller 32 is a terrestrial radio communication device 33.
Is input by a wireless signal. The terrestrial radio communication device 33 receives an output signal from the on-vehicle controller 34 of the electric guided vehicle 2 as a signal from the on-vehicle radio communication device 35.

As described above, the electric carrier 2 has a power receiving coil 11 having a built-in immersion detection sensor 9d and the output thereof is controlled to the rated voltage of the load-handling motor 21 which drives a hydraulic pump motor as a load. The stabilized power supply 17 not only adjusts the voltage, but also detects an overcurrent when a load is short-circuited and monitors an abnormal temperature. In this example, a hydraulic pump,
Although the loading motor 21 that drives the motor is shown as a load, it may be a motor for another work machine, or the battery 19 for traveling may be charged if there is enough power.

On the other hand, the ground controller 32 also manages the operation of the electric guided vehicle 2 and operates at the cargo handling position (pallet position).
Is taught to the electric carrier 2 using wireless communication. The electric carrier 2 moves the cargo handling position according to the control program of the on-board controller 34. In the loading position, the power supply coil 1
5 is formed in the form described above and is the same as the power supply position. Then, at this power supply position, the electric transport vehicle 2 extends the support arm 9 and starts preparations for cargo handling. Power supply side magnetic body 26
When the power receiving side magnetic body 28 is crimped, the power receiving coil 1
The immersion detection sensor 9d of No. 5 operates. The state of the sensor 9d is monitored by the in-vehicle controller 34, and when it is found that the sensor 9d has been activated, the state is notified to the terrestrial controller 32 via the in-vehicle wireless communication device 35 and the terrestrial wireless communication device 33. Since the current position of the electric guided vehicle 2 can be ascertained, the ground controller 32 switches the selector switch 31 so that an AC current can flow through the power supply circuit 10 connected to the corresponding pallet rack. After the switching, the output switch 13 is turned on, and the alternating current flows only in the selected power supply circuit 10. In the above-described embodiment, the example in which the power receiving coil 11 is provided on each of the front and rear support arms 9 and 9 has been described. However, the power receiving coil 11 is provided only on the front or rear support arm 9. Is also good.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the inside of a storage warehouse.

FIG. 2 is a power supply circuit diagram.

FIG. 3 is an electric circuit diagram for a vehicle.

FIG. 4 is a perspective view showing a power supply module of the power supply circuit.

FIG. 5 is an exploded perspective view showing a terminal portion of a conductive wire of the power supply module.

FIG. 6 is a perspective view showing a power receiving coil.

FIG. 7 is a cross-sectional view showing a power feeding coil and a power receiving coil.

FIG. 8 is a block diagram illustrating a power supply circuit and a power reception circuit when a plurality of pallet racks are used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pallet rack 1b ... Rack beam 2 ... Electric conveyance vehicle 3 ... Load 4 ... Pallet 5 ... Support stand 7 ... Elevating stand 8 ... Loading device 9 ... Support arm 9c ... Tip member 9d ... Immersion detection sensor 10 ... Feeding circuit 11 ... Power receiving coil 12 ... AC power supply 13 ... Output switch 14a, 14b ... Conducting wire 14c ... 14d ... Connection terminal 14e, 14f ... Screw, nut 15 ... Power supply coil 16 ... Impedance variable element 17 ... Stabilized power supply 18 ... In-vehicle electric circuit DESCRIPTION OF SYMBOLS 19 ... Battery 20 ... Traveling motor 21 ... Cargo handling motor 22 ... Main switch 23 ... Changeover switch 23b ... Changeover switch 24 ... Power supply module 25 ... Base 26, 28 ... Magnetic body 29 ... Spring 30 ... Transition cable 31 ... Selector switch 32, 34 … Controllers 33, 35… Wireless communication devices

Claims (9)

[Claims] 1. A moving body which moves along a pallet rack and has a support arm which is provided to extend and contract with a support arm abutting on an end face of one rack beam of the pallet rack as a mechanism for preventing the moving body from overturning. In a non-contact power supply device of a moving body, which supplies power in a non-contact state from a power supply coil of a power supply circuit provided on the ground side via a power receiving coil provided on the mobile body side, a power supply coil of the power supply circuit on the ground side is provided. The end face of the rack beam with which the tip member of the support arm contacts, and at each position where the tip face of the support arm contacts with the pallet rack when loading the moving body, supports the power receiving coil on the moving body side. A non-contact power supply device for a moving body, provided at a tip of a tip member of an arm. 2. The non-contact power feeding device for a moving body according to claim 1, wherein the power feeding coil of the power feeding circuit is configured by partially reciprocating the two reciprocating conductors. Non-contact power supply for the body. 3. The non-contact power feeding device for a mobile object according to claim 2, wherein a magnetic material serving as a core of the power feeding coil is disposed between the separated conductors of the power feeding coil. Non-contact power supply. 4. The non-contact power supply device for a mobile body according to claim 1, wherein the power supply circuit is configured by connecting a plurality of power supply modules each having at least one power supply coil embedded in a non-magnetic material. A non-contact power supply device for a mobile object, wherein a power supply module is fixed to a rack beam. 5. A non-contact power supply device for a mobile object according to claim 1, wherein a variable impedance element is interposed between the power supply circuit and the AC power supply. 6. The non-contact power supply device for a mobile body according to claim 1, wherein the power supply circuit and the AC power supply are connected via an output switch, and the power receiving coil is freely retractable and retractable at a tip end member of the support arm. And an immersion detecting sensor for detecting that the power receiving coil is in an immersive state capable of receiving power by coming into contact with the power supply unit. The immersion detecting sensor and the output switch are provided. And
A non-contact power supply device for a mobile object, wherein the output switch is turned on by a detection signal of an immersion detection sensor via a controller, a wireless communication device, and the like. 7. A non-contact power supply apparatus for a mobile object according to claim 6, wherein a plurality of pallet racks are used, and each power supply circuit of each pallet rack is connected to an AC power supply via a selector switch. Is connected to the immersion detection sensor via a controller and a wireless communication device so that a power supply circuit contacted by a support arm having the immersion detection sensor is turned on by a detection signal of the immersion detection sensor. A non-contact power feeding device for a mobile object, characterized by comprising: 8. The non-contact power supply device for a moving body according to claim 1, wherein a power receiving coil is connected to the battery of the vehicle-mounted electric circuit in which the traveling motor and the cargo handling motor are connected in parallel to the battery of the moving body and the cargo handling motor. A non-contact power supply device for a mobile object, which is selectively connected via a changeover switch. 9. The non-contact power supply device for a mobile object according to claim 1, wherein when used together with a plurality of mobile racks, a power supply conductor is provided together with a transition cable of the mobile rack. Non-contact power supply.