JP2002359901A - Power feed system for mobile unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a power feed system for a mobile unit which can realize the cost reduction and the improvement of a power feeding efficiency. SOLUTION: Feeder lines 7a and 7b are put through the inside of a core 9 without being brought into contact with the core 9, a ferromagnetic element 10, and a coil 12; neither a holding member 6 is brought into contact with the core 9, the ferromagnetic element 10, or the coil 12. The feeder line 7a is placed in a space between the top protrusion and center protrusion of the core 9 and the feeder line 7b is placed in a space between the center protrusion and the bottom protrusion of the core 9. An attachment member 8 is fixed to a main part of a carrier 4 with screws, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply system for a mobile object, and more particularly to an automatic storage and retrieval device for automatically storing and retrieving articles in a warehouse or the like by a carrier vehicle. The present invention relates to a power supply system for a carrier, which supplies the driving power of the carrier to the carrier in a non-contact manner.

[0002]

2. Description of the Related Art There is an automatic storage and retrieval apparatus for automatically storing and retrieving and retrieving articles in a warehouse or the like by a carrier. In such an automatic storage and retrieval device, non-contact power supply is performed as a method of supplying driving power for traveling to a carrier.

FIG. 15 is a perspective view schematically showing the configuration of an automatic storage and retrieval device. In order to store the articles 2 in the desired stockers 1a and 1b, or to take out the articles 2 from the desired stockers 1a and 1b, the power receiving unit 105
Transports the article 2 while traveling on the rails 3a and 3b.

FIG. 16 is a perspective view showing a structure when the rail 3a is viewed obliquely from below. On the back surface of the rail 3a, a ferromagnetic material 152 such as a ferrite sheet is provided over the entire length of the rail 3a. A plurality of holding members 151 are fixed to the ferromagnetic body 152 at equal intervals, and the leading ends of the holding members 151 are connected to primary-side power supply lines 150a and 150a.
b is attached.

FIG. 17 is a cross-sectional view showing the structure near the power receiving unit 105 of the carrier 4 together with the rail 3a. Carrier 4
Wheel 11 is in contact with the rail 3a. Power receiving unit 10
Numeral 5 has a core 9 having a substantially E-shaped cross section around which a secondary coil 154 is wound. The core 9 is the mounting member 1
The mounting member 153 is fixed to the main body of the transport vehicle 4. By disposing the ferromagnetic material 152 on the back surface of the rail 3a, it is possible to reduce the influence of the magnetic flux leaking from the opening of the core 9 on the rails 3a and 3b and its surroundings, and to improve the degree of magnetic coupling of the power receiving unit 105. The power supply efficiency has been improved.

[0006]

However, according to such a conventional power supply system for a mobile body, the rail 3
Since the ferromagnetic material 152 is disposed over the entire length of the power supply unit a, the cost increases, and a loss occurs due to the excitation of the power supply line 3a other than the power receiving unit 105, so that the power supply efficiency is increased. However, there was a problem that was reduced.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a power supply system for a mobile body, which can reduce costs and increase power supply efficiency.

[0008]

Means for Solving the Problems Claim 1 of the present invention
The power supply system for a moving object according to the item (1), wherein a power supply line is provided along a rail on which the moving object travels, and the power supply unit includes: Power supply system, wherein the power receiving unit has a core having an opening in which the power supply line is inserted, and a ferromagnetic piece disposed close to the opening of the core. is there.

According to a second aspect of the present invention, there is provided a power supply system for a mobile object according to the first aspect, wherein the core has a substantially E-shaped cross section. Wherein the ferromagnetic piece includes a first flat ferromagnetic body disposed to face the opening of the core.

According to a third aspect of the present invention, there is provided a power supply system for a mobile object according to the second aspect, wherein the ferromagnetic piece includes a first ferromagnetic piece. It is characterized by further including a short rod-shaped second ferromagnetic body disposed between the body and the opening of the core.

According to a fourth aspect of the present invention, there is provided a power supply system for a mobile object according to the first aspect, wherein the core has a substantially E-shaped cross section. Wherein the ferromagnetic piece includes a first ferromagnetic material partially connected to the core and having a substantially L-shaped cross section.

According to a fifth aspect of the present invention, there is provided a power supply system for a mobile object according to any one of the second to fourth aspects, wherein the power supply line comprises:
It is held by a holding member fixed to the rail,
The holding member further includes a long rod-shaped ferromagnetic material extending along the rail at a portion sandwiched between the opening of the core and the first ferromagnetic material. It is.

According to a sixth aspect of the present invention, in the power supply system for a moving body, a power supply line is provided along a rail on which the moving body travels, and a power receiving unit included in the moving body is provided.
A power supply system for supplying power to a mobile body in a non-contact manner from a power supply line, wherein the power receiving unit includes a core having an opening in which the power supply line is inserted, and a core disposed close to the core opening. And a magnetic piece, whereby the ferromagnetic piece moves with the traveling of the moving body.

According to a seventh aspect of the present invention, in the power supply system for a mobile unit, a power supply line is provided along a rail on which the mobile unit travels, and a power receiving unit included in the mobile unit is provided.
A power supply system to a mobile body, which supplies power from a power supply line in a non-contact manner, wherein the power supply line is held by a holding member fixed to a rail, and the power receiving unit is arranged to face the holding member. In addition, each of them has a symmetrical core having a substantially E-shaped cross section, and is provided with a ferromagnetic material disposed between the paired cores.

According to another aspect of the present invention, there is provided a power supply system for a mobile object according to claim 7, wherein the ferromagnetic material comprises a holding member.
In the portion sandwiched between the paired cores, a long rod-shaped ferromagnetic material extending along the rail is disposed, and in the power receiving portion, disposed in the portion sandwiched between the paired cores. And a short rod-shaped ferromagnetic material.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a perspective view schematically showing the configuration of the automatic storage and retrieval device. In order to store the articles 2 in the desired stockers 1a and 1b or to take out the articles 2 from the desired stockers 1a and 1b, the transport vehicle 4 (moving body) including the power receiving unit 5 is mounted on the rails 3a and 3b. The article 2 is transported while traveling.

FIG. 2 is a perspective view showing a structure when the rail 3a is viewed obliquely from below. A plurality of holding members 6 are fixed to the back surface of the rail 3a at equal intervals by screwing or the like. The holding member 6 includes a primary-side power supply line 7.
a, 7b are attached to be spaced apart in the vertical direction.

FIG. 3 is a perspective view showing the structure of the power receiving unit 5 of the carrier 4 according to the first embodiment. Mounting member 8
The core 9 and the ferromagnetic material 10 (ferromagnetic material pieces) are fixed thereon by screwing using a holding member (not shown) or the like. The core 9 has a substantially E-shaped cross section having three protrusions. The lowermost protrusion of the core 9 is fixed to the upper surface of the mounting member 8. Although not shown in FIG. 3, the secondary coil 1
2 are wound. The ferromagnetic material 10 is made of a flat ferrite or the like, and is disposed close to the core 9 so as to face the E-shaped opening of the core 9. A gap for inserting the holding member 6 shown in FIG. 2 is provided between the opening of the core 9 and the ferromagnetic body 10.

FIG. 4 is a cross-sectional view showing the structure of the vicinity of the power receiving section 5 of the carrier 4 together with the rail 3a according to the first embodiment. The power supply lines 7a and 7b are connected to the core 9, the ferromagnetic material 1
0 and the inside of the core 9 without contacting the coil 12. Further, the holding member 6 also includes the core 9 and the ferromagnetic material 1.
0, and not in contact with the coil 12. The power supply line 7a is
The power supply line 7b is located in the space between the uppermost protrusion of the core 9 and the middle protrusion, and the power supply line 7b is located in the space between the middle protrusion of the core 9 and the lowermost protrusion. ing. The mounting member 8 is fixed to the main body of the transport vehicle 4 by screwing or the like.

As described above, according to the power supply system for the mobile unit according to the first embodiment, the ferromagnetic body 10 is disposed in the power receiving unit 5 of the carrier 4 so as to face the opening of the core 9. I have.
Therefore, as compared with the case where the ferromagnetic body 10 is not provided, the leakage magnetic flux of the power receiving unit 5 is reduced and the power supply efficiency is improved, so that a large output power (secondary power) is obtained for the same input power (primary side). Side) can be obtained.

Further, since the ferromagnetic material 10 functions as a magnetic shield, magnetic leakage from the core 9 to the outside can be suppressed. Therefore, as compared with the case where the ferromagnetic material 10 is not provided, it is possible to install a conductive magnetic material such as iron near the core 9, and it is possible to reduce the size of the device.

Further, the ferromagnetic material 10 is provided only in the power receiving unit 5 of the carrier 4. Therefore, the cost can be reduced as compared with the conventional device in which the ferromagnetic material 152 is provided over the entire length of the rail 3a.

Further, when the ferromagnetic material 152 is provided over the entire length of the feed line 3a as in the conventional device, the ferromagnetic material 152 and the feed line 3a are installed in parallel with each other over the entire length. , The ferromagnetic material 1 may be provided at a portion other than the power receiving portion 105.
52 is slightly excited, resulting in losses. On the other hand, according to the power supply system for the moving body according to the first embodiment, since the ferromagnetic body 10 is provided only in the power receiving unit 5, such a loss does not occur.
Power supply can be made more efficient.

FIG. 5 is a perspective view showing a structure of power receiving unit 5 according to a modification of the first embodiment. FIG. 6 is a cross-sectional view showing a structure in the vicinity of the power receiving unit 5 of the transport vehicle 4 together with the rail 3a according to a modification of the first embodiment. FIG. 3 shows the ferromagnetic body 10 formed of a single flat plate.
0a and 10b may be used. Ferromagnetic material 10a, 10b
Is held by the holding member 13 and is fixed to the mounting member 8. According to the modification of the first embodiment, the same effect as described above can be obtained.

Embodiment 2 FIG. 7 is a perspective view showing the structure of power receiving unit 5 of carrier 4 according to the second embodiment of the present invention. FIG. 8 is a cross-sectional view showing the structure of the vicinity of the power receiving unit 5 of the carrier 4 together with the rail 3a according to the second embodiment. Instead of the flat ferromagnetic body 10 shown in FIG. 3, a ferromagnetic body 14 (ferromagnetic body piece) having a substantially L-shaped cross section is provided. The end of the bottom of the L shape is in contact with the end of the lowest protrusion of the core 9. Other structures of the power receiving unit 5 according to the second embodiment are the same as those of the first embodiment shown in FIGS.

As described above, according to the power supply system for the moving body according to the second embodiment, the ferromagnetic material 1 shown in FIGS.
By disposing the ferromagnetic material 14 in place of
The gap between the lowermost protrusion and the ferromagnetic body 10 can be eliminated. Therefore, since the total length of the gap is reduced, the power supply efficiency can be improved.

Embodiment 3 FIG. 9 is a cross-sectional view showing a structure near power receiving unit 5 of carrier 4 together with rail 3a according to the third embodiment of the present invention. Between the lowermost protrusion of the core 9 and the ferromagnetic material 10, on the upper surface of the mounting member 8, a short bar-shaped strong rod extending parallel to the ferromagnetic material 10 and in a direction perpendicular to the paper surface. The magnetic body 21c is provided. The width of the ferromagnetic body 21c (the width in the left-right direction on the paper of FIG. 9) is equal to the width of the holding member 20. However, ferromagnetic material 1
Instead of 0, 21c, as shown in FIG.
The ferromagnetic body 14 according to the second embodiment described above may be provided.

A holding member 20 is provided instead of the holding member 6 shown in FIGS. FIG. 11 is a perspective view showing the structure when the rail 3a is viewed from obliquely below. A plurality of holding members 20 are fixed to the back surface of the rail 3a at equal intervals by screwing or the like. The power supply lines 7a and 7b on the primary side are attached to the holding member 20 so as to be vertically separated from each other.

Referring to FIGS. 9 to 11, ferromagnetic material 21a is provided on holding member 20 at a portion sandwiched between uppermost protrusion of core 9 and ferromagnetic materials 10 and 14. I have. Also, the central protrusion of the core 9 and the ferromagnetic materials 10, 1
4, a ferromagnetic body 21b is provided. The ferromagnetic bodies 21a and 21b are formed in a long rod shape over the entire length of the rail 3a.

As described above, according to the power supply system for the moving body according to the third embodiment, the holding member 6 shown in FIGS.
Holding member 20 having ferromagnetic bodies 21a and 21b instead of
And by disposing the ferromagnetic material 21c between the ferromagnetic material 10 and the core 9, the gap between the ferromagnetic materials 10, 14 and the core 9 can be reduced. it can. Therefore, since the total length of the gap is shortened, the power supply efficiency can be further improved.

In the embodiment shown in FIG. 9, the gap length for the feed line 7a and the gap length for the feed line 7b are equal to each other, and the distribution of magnetic flux is symmetrical. Become.

Embodiment 4 FIG. FIG. 12 is a cross-sectional view showing a structure near power receiving unit 5 of carrier 4 together with rail 3a according to Embodiment 4 of the present invention. FIG. 13 is a perspective view showing a structure when the rail 3a is viewed obliquely from below. Referring to FIGS. 12 and 13, a flat holding member 30 is attached to rail 3a instead of holding member 6 shown in FIGS. Power supply lines 31a, 31b
Are embedded in the holding member 30.

Referring to FIG. 12, mounting member 8 has a pair of cores 9 instead of cores 9 shown in FIGS.
a, 9b are disposed to face each other with the holding member 30 interposed therebetween. The cores 9 a and 9 b have a symmetrical structure with respect to the center plane of the holding member 30. In the holding member 30, a ferromagnetic material 32a is provided at a position between the uppermost protrusions of the cores 9a and 9b. In addition, at a portion sandwiched between the protrusions in the middle of the cores 9a and 9b,
A ferromagnetic body 32b is provided. Also, the mounting member 8
The ferromagnetic material 32c is disposed on the upper surface of the core 9 at a position between the lowermost protrusions of the cores 9a and 9b. The width of the ferromagnetic body 32c (the width in the left-right direction of FIG. 12)
Is equal to the width of the holding member 30. The ferromagnetic material 32c extends in a short rod shape parallel to the cores 9a and 9b and in a direction perpendicular to the paper surface.

Referring to FIG. 13, holding member 30 is formed to extend over the entire length of rail 3a. Therefore, the ferromagnetic bodies 32a and 32b are also formed to extend in a long rod shape over the entire length of the rail 3a.

FIG. 14 is a schematic diagram showing a magnetic flux path according to the fourth embodiment. The feed line 31a is the feed line 3
1a is located at the center of the magnetic flux path. Similarly, the power supply line 31b is located at the center of the magnetic flux path for the power supply line 31b. Also, the ferromagnetic materials 32a to 32c
Is provided, the gap between the cores 9a and 9b is shortened.

As described above, according to the power supply system for the moving body according to the fourth embodiment, since the paired cores 9a and 9b are arranged symmetrically with the holding member 30 interposed therebetween, the leakage magnetic flux can be reduced. Power supply efficiency can be improved.

Further, since the power supply lines 31a and 31b are embedded and disposed inside the flat holding member 30, the space for mounting the holding member 30 can be reduced, and the size of the apparatus can be reduced. .

[0038]

According to the first, second, and sixth aspects of the present invention, since the ferromagnetic piece is disposed close to the opening of the core, the power supply efficiency in the power receiving unit can be increased. Can be. In addition, since the ferromagnetic material pieces are provided only in the power receiving portion of the moving body, cost reduction and the like can be achieved as compared with the case where the ferromagnetic material is provided over the entire length of the rail. it can.

According to the third aspect of the present invention, since the total length of the gap of the magnetic path is reduced, the power supply efficiency is improved as compared with the power supply system for the moving body according to the first and second aspects. Can be further improved.

According to the fourth aspect of the present invention, since the total length of the gap of the magnetic path is reduced, the power supply efficiency is further improved as compared with the power supply system for the moving body according to the first aspect. Can be improved.

According to the fifth aspect of the present invention, since the gap of the magnetic path can be further reduced, compared with the power supply system for the moving body according to the second to fourth aspects, The power supply efficiency can be further improved.

According to the seventh aspect of the present invention, since the paired cores are symmetrically arranged with the holding member interposed therebetween, the leakage magnetic flux can be reduced, and the power supply efficiency is improved. be able to. Moreover, since the ferromagnetic material is provided between the paired cores, the gap in the magnetic path can be reduced, and the power supply efficiency can be improved.

According to the eighth aspect of the present invention, since a part of the ferromagnetic material is formed only in the power receiving portion, all the ferromagnetic materials extend along the rail. Compared with the case of disposing, the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a configuration of an automatic storage and retrieval device according to the present invention.

FIG. 2 is a perspective view showing a structure of the first embodiment of the present invention when the rail is viewed from obliquely below.

FIG. 3 is a perspective view showing a structure of a power receiving unit of the transport vehicle according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a structure in the vicinity of a power receiving unit of the carrier together with rails according to the first embodiment of the present invention.

FIG. 5 is a perspective view showing a structure of a power receiving unit according to a modification of the first embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a structure in the vicinity of a power receiving unit of a carrier together with rails according to a modification of the first embodiment of the present invention.

FIG. 7 is a perspective view showing a structure of a power receiving unit of the carrier according to the second embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a structure in the vicinity of a power receiving unit of a carrier together with rails according to the second embodiment of the present invention.

FIG. 9 is a cross-sectional view showing a structure in the vicinity of a power receiving unit of a carrier together with rails according to a third embodiment of the present invention.

FIG. 10 shows a modification of the third embodiment of the present invention.
It is sectional drawing which shows the structure near the power receiving part of a conveyance vehicle with a rail.

FIG. 11 is a perspective view showing a structure when a rail is viewed from obliquely below according to the third embodiment of the present invention.

FIG. 12 is a cross-sectional view showing a structure near a power receiving unit of a carrier together with rails according to a fourth embodiment of the present invention.

FIG. 13 is a perspective view showing a structure when a rail is viewed from obliquely below according to the fourth embodiment of the present invention.

FIG. 14 is a schematic diagram illustrating a magnetic flux path according to the fourth embodiment of the present invention.

FIG. 15 is a perspective view schematically showing a configuration of an automatic storage and retrieval device according to the related art.

FIG. 16 is a perspective view showing a structure when a rail is viewed from obliquely below according to the related art.

FIG. 17 is a cross-sectional view showing a structure in the vicinity of a power receiving unit of a transport vehicle together with a rail according to the related art.

[Explanation of symbols]

3a, 3b Rail 4 Carrier 5 Power receiving unit 6, 13, 20, 30 Holding member 7a, 7b, 31a, 31b Feeding line 9 Core 10, 10, 10a, 10b, 14, 21a to 21c, 32a
~ 32c ferromagnetic material

Claims (8)

[Claims] 1. A power supply system for a mobile body, comprising: a power supply line provided along a rail on which the mobile body travels, and a non-contact power supply from the power supply line to a power receiving unit included in the mobile body. Wherein the power receiving unit includes: a core having an opening in which the power supply line is inserted; and a ferromagnetic piece disposed in proximity to the opening of the core. Power supply system for the body. 2. The core according to claim 1, wherein the core is a core having a substantially E-shaped cross section, and the ferromagnetic piece includes a first flat ferromagnetic body disposed to face the opening of the core. Item 2. A power supply system for a mobile object according to item 1. 3. The ferromagnetic material piece further includes a short rod-shaped second ferromagnetic material disposed between the first ferromagnetic material and the opening of the core. A power supply system for a moving object according to claim 1. 4. The core is a core having a substantially E-shaped cross-section, and the ferromagnetic piece includes a first ferromagnetic body partially connected to the core and having a substantially L-shaped cross-section. The power supply system for a mobile body according to claim 1. 5. The power supply line is held by a holding member fixed to the rail, and a portion of the holding member sandwiched between the opening of the core and the first ferromagnetic material, The power supply system for a moving body according to any one of claims 2 to 4, further comprising a long bar-shaped ferromagnetic body disposed to extend along the rail. 6. A power supply system for a mobile body, wherein a power supply line is provided along a rail on which the mobile body travels, and power is supplied to the power receiving unit of the mobile body from the power supply line in a non-contact manner. The power receiving unit has a core having an opening in which the power supply line is inserted, and a ferromagnetic piece disposed in close proximity to the opening of the core, A power supply system for a moving body, wherein the magnetic piece moves as the moving body travels. 7. A power supply system for a mobile body, wherein a power supply line is provided along a rail on which the mobile body travels, and power is supplied to the power receiving unit of the mobile body from the power supply line in a non-contact manner. Wherein the power supply line is held by a holding member fixed to the rail, and the power receiving unit is disposed to face the holding member.
A power supply system for a moving body, comprising a symmetric core having a substantially E-shaped cross section and a ferromagnetic material disposed between the paired cores. 8. The ferromagnetic body, comprising: a long rod-shaped ferromagnetic body extending along the rail at a portion of the holding member sandwiched between the paired cores. The power supply system for a moving body according to claim 7, further comprising: a short rod-shaped ferromagnetic material disposed in a portion sandwiched between the paired cores in the power receiving unit.