JP2001177901A - Noncontact feeding pick up, carrying car and carriage system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a noncontact feeding pick up which has a large capacity, facilitates fitting a coil on a pickup core, and is light-weight. SOLUTION: A noncontact feeding pick up 14 provided with a circular pickup core 14a-14c, having an air gap 14h formed by opening its part, and a coil 14e formed beforehand so as to surround the magnetic path of the core 14a-14c and put on the core 14a-14c. The core 14a-14c is formed so that the shape of the cross section of its magnetic path is approximately uniform.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-power receiving circuit which receives power from a power supply line of a primary circuit connected to an AC power supply by a secondary circuit (coil) magnetically coupled to the primary circuit in a physically non-contact state. The present invention relates to a contact power supply pickup, a transport vehicle using the contactless power supply pickup, and a transport system using the transport vehicle.

[0002]

2. Description of the Related Art Conventionally, various transport systems for transporting packages by a transport vehicle that moves along guide rails have been implemented, and the efficiency of distribution in factories and warehouses has been improved. Generally, a traveling motor is used for traveling of such a transport vehicle, and the driving power to the traveling motor is supplied via a power supply line laid along the guide rail and through which AC power flows. .

Conventionally, this power supply method includes a trolley type and a non-contact type. The trolley type is a system in which a current collector provided on a carrier is brought into contact with a power supply line to supply power. on the other hand,
The non-contact system is a system in which a pickup provided on a carrier is arranged near a power supply line and an induced electromotive force is generated in a coil of the pickup to obtain electric power. The trolley type requires maintenance due to current collector wear and has the problem of generating dust and sparks, whereas the non-contact type has no such problems, and non-contact type power supply devices are often used. I have.

FIG. 10 is a schematic sectional view showing a configuration example of a conventional non-contact power feeding pickup disclosed in Japanese Patent Application Laid-Open No. 9-252552. This pickup 34
Power is supplied from a power supply line 5 laid along the guide rail 1. The pickup core constituting the pickup 34 has a rectangular plate-like back plate portion 34a made of a magnetic material, and upper and lower plate portions 34b, 34c extending in parallel from upper and lower edges, respectively, to form an upper and lower plate portions 34b, 34c. A convex portion 34g, 34g having a rectangular cross section is fixed to the opposing surface of the front end portion, so as to form a substantially C shape in side view, and a coil 34e is wound around the back plate portion 34a. The interval between the convex portions 34g, 34g is set to be substantially equal to or slightly larger than the diameter of the power supply line 5.

[0005] As shown in FIG. 10, a guide rail 1 has a support 1p between an upper plate 1u and a lower plate 1d which are parallel to each other.
A support arm (not shown) is attached to one side surface at a substantially constant interval in the longitudinal direction, and is suspended on the ceiling of a factory or the like via the support arm. It is installed in the state that it was. On the other side surface of the guide rail 1, a power supply line 5 constituting a power supply unit is fixed over the same entire length in the longitudinal direction, and is connected to a power supply unit 6 as shown in FIG. 9. The power supply line 5 extends to each end of a large number of supporters 1a fixed to the side surface of the guide rail 1, and
They are arranged in a loop. The power supply line 5 is configured by covering a stranded wire formed by concentrating insulated thin wires with a resin material.

In such a pickup 34, as shown in FIG. 10, the power supply line 5 is positioned close to the coil 34e inside the C-shaped pickup core, and the power is supplied along with the movement of the carrier. The supporter 1a of the electric wire 5 passes between the convex portions 34g, 34g. The induced electromotive force generated by the coil 34e changes depending on the length of the pickup core (length in the extending direction of the power supply line 5) if the number of turns of the coil 34e and the power supplied to the power supply line 5 are the same. In general, a method of obtaining the required power by changing the length of the pickup core corresponding to the power required on the load side and the power receiving capacity of the coil 34e is generally adopted.

FIG. 11 is a schematic sectional view showing a configuration example of another conventional non-contact power feeding pickup. The pickup 44 has a rectangular back plate 44 made of a magnetic material.
a pickup core formed so that an upper plate portion 44b, a lower plate portion 44c, and a middle plate portion 44d project parallel to each other on the same side from the upper, lower, and central portions to form an E-shape in side view. And the upper and lower back plate portions 44a divided by the middle plate portion 44d of the pickup core,
It is configured by winding coils 44e, 44e made of a litz wire.

[0008] Such a pickup 44 is provided with two coils 44e, 44e in two E-shaped recesses in a side view.
In a state close to the feeder 44e, the reciprocating wires of the feeder line 5 are provided at respective positions, and as shown in the non-contact power feeder of FIG. An induced electromotive force is generated at 44e and supplied to the motor M via the power conversion unit 7.

The induced electromotive force generated in the coil 44e varies depending on the length of the pickup core (length in the extending direction of the power supply line 5) if the number of turns of the coil 44e and the power supplied to the power supply line 5 are the same. Therefore, in this pickup 44,
A coil 44e is provided for each reciprocating line of the power supply line 5, and the required power is obtained by equivalently changing the length of the pickup core corresponding to the power required on the load side.

A monorail type transfer system using the above-mentioned non-contact power supply pickup and non-contact power supply device is as shown in the schematic diagram of FIG. 8, which is mounted on a monorail type guide rail 10 in a factory. , A plurality of carriers 2 are suspended and drive-controlled by the system controller 3. The guide rail 10 forms multiple loops by connecting stations (not shown) corresponding to the purpose of transport.
Each intersection is provided with a switch-rail type branching / merging unit 4 for selectively using either one.

As an example, as shown in FIG. 11, the guide rail 10 has a substantially I-shaped cross section with a support 10p extending between an upper plate 10u and a lower plate 10d which are parallel to each other. Support arms on one side at approximately constant intervals in the longitudinal direction
(Not shown), and is suspended from the ceiling or the like of the factory via the support arms. On the other side surface of the guide rail 10, each reciprocating line of the power supply line 5 constituting the power supply unit is fixed over the same entire length in the longitudinal direction, and is connected to the power supply unit 6 as shown in FIG. 9. Each reciprocating line of the power supply line 5 is arranged in a loop shape so as to extend over each end of a pair of upper and lower supporters 10a fixed to the side surface of the guide rail 10. The power supply line 5 is configured by covering a stranded wire formed by concentrating insulated thin wires with a resin material.

On the other hand, as shown in FIG. 7, the transport vehicle 2 is constructed by suspending a carrier 23 which detachably mounts an object to be transported over a pair of front and rear body frames 21 and 22 having a U shape. ing. The body frame 21 is provided with the guide rail 1 on the upper part thereof.
And a pair of steady rest rollers 21b and 21c which are in contact with the upper and lower side surfaces of the guide rail 10 respectively. In addition to the above, a motor M connected to the drive trolley 21a is fixed to the upper part. Further, a pickup 44 as shown in FIG. 11 is provided at a portion of the body frame 21 facing the power supply line 5 of the guide rail 10.

[0013]

By the way, in the conventional non-contact power supply pickup as described above, the pickup shown in FIG. 11 has a large magnetic resistance due to a long magnetic path length in an air gap, and has a large power supply line. And the magnetic coupling state with it was getting worse. In the pickup shown in FIGS. 10 and 11, since the cross-sectional shape of the pickup core is not uniform, for example, the rectangular coil 4 formed as shown in FIG.
12 (a) is a side view of FIG. 12 (a) (FIG. 12 (a) is a side view of FIG. 12 (a)). Of the thicknesses of the plate portion 44c and the back plate portion 44a, the thickness A of the bent portion from the lower plate portion 44c to the back plate portion 44a is the largest, so the bending radius of the flat coil 44e is increased accordingly. The flat coil 44e more than necessary
There was a problem that it became large. Workability was also poor.

The present invention has been made in view of the circumstances described above, and the first to third inventions have a large capacity,
An object of the present invention is to provide a non-contact power feeding pickup which is easy to fit a coil into a pickup core and is lightweight. A fourth object of the present invention is to provide a transport vehicle in which a built-in non-contact power supply pickup has a large capacity, is easy to fit a coil into a pickup core, and is lightweight. It is an object of the fifth invention to provide a transport system that uses a light-weight transport vehicle in which a built-in non-contact power supply pickup has a large capacity, is easy to fit a coil into a pickup core, and is lightweight.

[0015]

According to a first aspect of the present invention, there is provided a contactless power supply pickup including a ring-shaped pickup core having an air gap partially open, and a magnetic path of the pickup core wound in advance. A non-contact power supply pickup comprising: a formed coil; and a coil externally fitted to the pickup core, wherein the pickup core has a substantially uniform cross-sectional shape of the magnetic path.

In this contactless power supply pickup, the pickup core is annular with a partly open air gap, and a coil is formed in advance so as to wind a magnetic path of the pickup core. The pickup core has a substantially uniform cross-sectional shape of the magnetic path. As a result, a portion having little relation to the magnetic path of the pickup core is removed, and a light-weight non-contact power supply pickup in which the coil can be easily fitted into the pickup core can be realized.

A contactless power supply pickup according to a second aspect of the present invention comprises two annular pickup cores stacked in two stages so as to have air gaps partially open on the same side, respectively. A non-contact power supply pickup including two coils each formed in advance so as to wind each magnetic path of the pickup core and externally fitted to the two pickup cores, wherein the two pickup cores include: The magnetic path has a substantially uniform cross-sectional shape.

In this non-contact power feeding pickup, two pickup cores are stacked in two stages and are annular so as to have air gaps partially open on the same side, and the two coils are The magnetic paths of the two pickup cores are formed in advance so as to be wound thereon, and are fitted to the two pickup cores, respectively. The two pickup cores have substantially uniform cross sections of the magnetic paths. This makes it possible to realize a non-contact power supply pickup that has a large capacity, is easy to fit the coil into the pickup core, and is lightweight.

The contactless power supply pickup according to a third aspect of the invention is characterized in that the air gap has an area of an open end face of the pickup core larger than a cross-sectional area of the magnetic path. .

In this non-contact power supply pickup, the air gap is formed by making the area of the open end face of the pickup core larger than the cross-sectional area of the magnetic path of the pickup core. It is possible to realize a non-contact power feeding pickup that is easy to fit into the core and lightweight.

According to a fourth aspect of the present invention, there is provided a carrier including a non-contact power supply pickup according to any one of claims 1 to 3, and a motor driven by electric power supplied by the non-contact power supply pickup. When the motor is driven, the load is conveyed.

In this transport vehicle, the non-contact power supply pickup is described in any one of claims 1 to 3, and a motor is driven by electric power supplied by the non-contact power supply pickup. By being driven, the cargo is conveyed. Accordingly, it is possible to realize a light-weight transport vehicle in which the built-in non-contact power supply pickup has a large capacity, is easy to fit the coil into the pickup core, and is lightweight.

According to a fifth aspect of the present invention, there is provided a transport system.
, A guide rail along which the carrier should move, and a power supply line laid along the guide rail to supply power to the carrier.

In this transport system, the transport vehicle is a fourth aspect of the present invention.
In the guide rail, the carrier moves along the guide rail, and the power supply line is laid along the guide rail to supply power to the carrier. Accordingly, it is possible to realize a transport system that uses a light-weight transport vehicle in which the built-in non-contact power supply pickup has a large capacity, is easy to fit the coil into the pickup core, and is lightweight.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing the embodiments. Embodiment 1 FIG. FIG. 1 is a front view (a) and a side view (b) showing the configuration of a contactless power supply pickup according to a first embodiment of the present invention. This non-contact power supply pickup 1
Reference numeral 4 denotes a pickup core formed of a magnetic material and formed from a rectangular plate-shaped back plate portion 14a at both end sides of the plate portions 14b and 14b, respectively.
The end portions 14g and 14f of the plate portions 14b and 14c are formed in an annular shape so as to surround the power supply line 5 by narrowing the interval between the opposing surfaces so as to form an air gap 14h having a rectangular cross section. It is.

As shown in the front view (a) and the side view (b) of FIG. 2, the coil 14e of the pickup 14 winds the magnetic path of the pickup core through which the magnetic flux by the current flowing through the feed line 5 passes. It is pre-formed on a rectangular coil.
The above-described pickup core has a substantially uniform cross-sectional shape so that the coil 14e can be fitted from the air gap 14h side to the back plate portion 14a.
The boundaries between the back plates 14a and 4b, 14c are formed in a curved shape so that the coil 14e can be easily fitted. The air gap 14h is narrowed to such an extent that the power supply line 5 is detachable through the air gap 14h, and the cross-sectional area through which the magnetic flux passes is made larger than the cross-sectional areas of the plate portions 14b, 14c and the back plate portion 14a.

FIG. 3 is a schematic sectional view showing the relationship between the pickup 14 and the feeder line 5. The guide rail 1 has a support 1p between an upper plate 1u and a lower plate 1d which are parallel to each other. The support arm (not shown) is attached to one side surface at a substantially constant interval in the longitudinal direction, and is suspended on the ceiling of a factory or the like via the support arm. It is installed in a state.

On the other side surface of the guide rail 1, a power supply line 5 constituting a power supply section is fixed over the same entire length in the longitudinal direction. The power supply line 5 is provided in a loop shape so as to extend over each end of a large number of supporters 1 a fixed to the side surface of the guide rail 1. The power supply line 5 is configured by covering a stranded wire formed by concentrating insulated thin wires with a resin material.

In such a pickup 14, as shown in FIG. 3, the power supply line 5 is positioned close to the coil 14e inside the pickup core. The supporter 1a has an air gap 14
pass h. Also, as described above, the air gap 14h
Is reduced to such an extent that the feeder line 5 can be detached therethrough, and the cross-sectional area through which the magnetic flux passes is made larger than the cross-sectional areas of the plate portions 14b, 14c and the back plate portion 14a. The magnetic resistance is greatly reduced by the enlargement and the reduction of the air gap, and the reduction of the magnetic resistance can increase the mutual inductance, that is, increase the power receiving capacity.

Embodiment 2 FIG. FIG. 4 is a front view (a) and a side view (b) showing the configuration of the first embodiment of the non-contact power feeding pickup according to the present invention. The pickup core of the non-contact power feeding pickup 24 has two pickup cores of the pickup 14 shown in FIG. 1 arranged in parallel with their open sides facing the same side.
b and 14c are fixed to each other in a state where they are in contact with each other, and between the tips of the plate portions 24b and 24c which are in contact with each other, there is no significant relationship with the magnetic path.
d.

The two coils 24e of the pickup 24
Is formed in a rectangular coil in advance as shown in the front view (a) and the side view (b) of FIG. 5 so as to wind a magnetic path of a pickup core through which a magnetic flux by a current flowing through the feeder line 5 passes. . The above-described pickup core has an air gap 24.
The cross-sectional shape is made substantially uniform so that the coil 24e can be fitted from the h side to the back plate portion 24a. In particular, the boundary between the plate portions 24b and 24c and the back plate portion 24a is formed into a curved shape. Thus, the coil 24e is easily fitted. The air gap 24h is narrowed to such an extent that the power supply line 5 is detachable through the air gap 24h, and the cross-sectional area through which the magnetic flux passes is reduced by the plate portions 24b and 24c and the back plate portion 24a.
Is larger than the cross-sectional area.

FIG. 6 is a schematic cross-sectional view showing the relationship between the pickup 24 and the feeder line 5. The guide rail 10 has a support 10p between an upper plate 10u and a lower plate 10d parallel to each other. The support arm (not shown) is attached to one side surface at a substantially constant interval in the longitudinal direction, and is suspended on the ceiling of a factory or the like via the support arm. It is installed in a state.

On the other side surface of the guide rail 10, the power supply line 5 constituting the power supply section is fixed over the same entire length in the longitudinal direction. Each reciprocating line of the power supply line 5 is a pair of upper and lower supporters 1 fixed to the side surface of the guide rail 10.
0a, and are arranged in a loop shape.
The power supply line 5 is configured by covering a stranded wire formed by concentrating insulated thin wires with a resin material.

As shown in FIG. 6, such a pickup 24 has the reciprocating lines of the power supply line 5 located close to the coil 24e inside the pickup core. The supporter 10a of each reciprocating line of the power supply line 5 passes through each air gap 24h.

Each of the air gaps 24h is narrowed so that the reciprocating lines of the power supply line 5 can be detached therethrough. Since it is made large, the magnetic resistance is greatly reduced by the expansion of the magnetic path area and the reduction of the air gap, and the reduction of the magnetic resistance can increase the mutual inductance, that is, increase the power receiving capacity. Further, since the number of the pickup cores is two as compared with the case of the first embodiment, the power receiving capacity can be doubled with a simple configuration. The number of pickup cores can be arbitrarily increased until the number of pickup cores reaches a value that satisfies the required power receiving capacity.

Embodiment 3 FIG. 7 is a schematic side view showing the configuration of the embodiment of the carrier according to the present invention. The carrier 2 has a pair of front and rear body frames 21 and 22 having a U-shape.
2 to which the transferred object is detachably mounted
3 is suspended. The vehicle body frame 21 has a driving trolley 21a that is in contact with the upper surface of the guide rail 10 at the upper portion thereof, and a drive trolley 21a that is in contact with the upper and lower sides of the guide rail 10 at each position. A pair of steady rest rollers 21b and 21c are provided, and a motor M connected to the drive trolley 21a is fixed on the upper part. In the body frame 21, a portion facing the power supply line 5 of the guide rail 10 is provided with the second embodiment.
Is provided.

In the transporting vehicle 2 having such a configuration, the motor M is driven by the electric power supplied by the pickup 24, and the driving trolley 21 a connected to the motor M is driven by the motor M to drive the guide rail 10. Roll on top. The transport vehicle 2 moves along the guide rail 10 by the drive trolley 21 a rolling on the upper surface of the guide rail 10, and transports the transported object detachably attached to the carrier 23.

Embodiment 4 FIG. FIG. 8 is a schematic perspective view showing the configuration of the embodiment of the transport system according to the present invention. In this transport system, a plurality of transport vehicles 2 described in the third embodiment are suspended on the above-described monorail type guide rail 10 in a factory, and a system controller 3 is provided.
Is driven and controlled. The guide rail 10 forms a multiplex loop by connecting stations (not shown) corresponding to the purpose of transport, and each intersection has a switch-rail type branch for selectively using one of them. -The junction 4 is provided.

As described in the third embodiment, the guide rail 10 includes an upper plate 10u and a lower plate 1 parallel to each other.
The support arm 10p has a substantially I-shaped cross section across the support 10p, and a support arm (not shown) is attached to one side of the support 10p at substantially constant intervals in the longitudinal direction. It is installed in a state of being hung on the ceiling of a factory.
On the other side surface of the guide rail 10, each reciprocating line of the power supply line 5 constituting the power supply unit is fixed over the same entire length in the longitudinal direction, and is connected to the power supply unit 6. Each reciprocating line of the power supply line 5 is arranged in a loop shape so as to extend over each end of a pair of upper and lower supporters 10a fixed to the side surface of the guide rail 10. The power supply line 5 is configured by covering a stranded wire formed by concentrating insulated thin wires with a resin material.

In the transport system having such a configuration, FIG.
The alternating current is supplied from the power supply unit 6 to the power supply line 5 by the non-contact power supply device as shown in FIG. The carrier 2 incorporates the pickup 24 (FIG. 6) described in the second embodiment, and the induced electromotive force generated by magnetic coupling between the two non-contact power supply coils 24e of the pickup and each reciprocating line of the power supply line 5. Is converted into a desired power by the power conversion unit 7. This converted power drives the motor M, and the motor M
Is driven, the drive trolley 21 a (FIG. 7) connected to the motor M rolls on the upper surface of the guide rail 10.
The transport vehicle 2 moves along the guide rail 10 by the drive trolley 21 a rolling on the upper surface of the guide rail 10, and transports the transported object detachably attached to the carrier 23.

[0041]

According to the non-contact power supply pickup of the first invention, it is possible to realize a lightweight non-contact power supply pickup in which the coil can be easily fitted into the pickup core and is lightweight.

According to the non-contact power supply pickup according to the second and third aspects of the present invention, it is possible to realize a non-contact power supply pickup which has a large capacity, is easy to fit a coil into a pickup core, and is lightweight.

According to the carrier according to the fourth aspect of the invention, it is possible to realize a carrier having a built-in non-contact power supply pickup having a large capacity, a coil easily fitted into the pickup core, and a light weight.

According to the transfer system of the fifth aspect, a non-contact power supply pickup incorporated therein realizes a transfer system using a transfer vehicle having a large capacity, a coil easily fitted into the pickup core, and a light weight. I can do it.

[Brief description of the drawings]

FIG. 1 is a front view and a side view showing a configuration of an embodiment of a contactless power supply pickup according to the present invention.

FIGS. 2A and 2B are a front view and a side view showing an outer shape of a coil of the contactless power supply pickup according to the present invention. FIGS.

FIG. 3 is a schematic cross-sectional view illustrating a relationship between a non-contact power supply pickup illustrated in FIG. 1 and a power supply line.

4A and 4B are a front view and a side view showing a configuration of an embodiment of a contactless power supply pickup according to the present invention.

5A and 5B are a front view and a side view showing an outer shape of a coil of the contactless power supply pickup according to the present invention.

6 is a schematic cross-sectional view illustrating a relationship between a non-contact power supply pickup illustrated in FIG. 4 and a power supply line.

FIG. 7 is a schematic side view showing the configuration of the embodiment of the carrier according to the present invention.

FIG. 8 is a schematic perspective view showing a configuration of an embodiment of a transport system according to the present invention.

FIG. 9 is a block diagram illustrating a configuration of a wireless power supply device.

FIG. 10 is a schematic sectional view showing a configuration example of a conventional contactless power supply pickup.

FIG. 11 is a schematic sectional view showing a configuration example of another conventional non-contact power feeding pickup.

FIG. 12 is an explanatory diagram for explaining a problem of the contactless power supply pickup shown in FIG. 11;

[Explanation of symbols]

1, 10 guide rail 2 carrier 3 system controller 4 branching / merging section 5 power supply line 6 power supply section 14, 24 pickup (contactless power supply pickup) 14a, 24a back plate section (pickup core) 14b, 14c, 24b, 24c Plate portion (pickup core) 14e, 24e Coil 14h, 24h Air gap 21, 22 Body frame 21a Drive trolley 23 Carrier 24d Space M Motor

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Haruyoshi Kitayoshi 4-17-96, Tsurumi-ku, Tsurumi-ku, Osaka-shi, Osaka Inside Tsubakimoto Chain Co., Ltd. (72) Kenzo Yamamoto 4-chome, Tsurumi-ku, Tsurumi-ku, Osaka-shi, Osaka No. 17-96 F-term in Tsubakimoto Chain Co., Ltd. (reference) 5H105 AA17 BA02 BB07 CC02 CC19 DD10

Claims (5)

[Claims] An annular pickup core having an air gap partially open, and a coil formed in advance so as to wind a magnetic path of the pickup core and externally fitted to the pickup core. A non-contact power supply pickup, wherein the pickup core has a substantially uniform cross-sectional shape of the magnetic path. 2. A two-stage annular pickup core and a magnetic path of each of the two pickup cores are wound so as to have an air gap partially open on the same side. A non-contact power supply pickup comprising two coils respectively formed in advance and fitted to the two pickup cores, wherein the two pickup cores have substantially uniform cross-sectional shapes of the magnetic path. A non-contact power supply pickup characterized in that: 3. The non-contact power supply pickup according to claim 1, wherein the air gap has an area of an open end face of the pickup core larger than a sectional area of the magnetic path. 4. A non-contact power supply pickup according to claim 1, and a motor driven by electric power supplied by the non-contact power supply pickup, wherein the motor is driven. A transport vehicle characterized in that the transport of a load is performed by the transport vehicle. 5. The carrier according to claim 4, a guide rail along which the carrier should move, and a power supply line laid along the guide rail for supplying power to the carrier. A transport system comprising: