JP7541489B2 - Through electrode member, storage box, and wireless power supply system for vehicles - Google Patents

Description

The present invention relates to a through electrode member, a housing box, and a wireless power supply system for vehicles.

For example, Patent Document 1 discloses a terminal fitting configuration that uses a screw shaft that penetrates the wall of a hollow box and nuts attached to both ends of the screw shaft to electrically connect wiring inside and outside the box. In this configuration, the screw shaft is inserted into a through hole formed in the wall of the box. The wiring inside and wiring outside the box are each sandwiched between the nut and the wall of the box.

For example, a box (sometimes called a handhole) that houses various electrical devices inside may be buried in the road. When a large amount of rainwater seeps into the road, the box may become submerged. In such a case, in the configuration disclosed in Patent Document 1, water may penetrate from the outside of the box into the inside through the gap between the through hole and the bolt of the box. As a result, the electrical devices housed in the box may be damaged. For this reason, the gap between the through hole and the bolt may be sealed with a caulking material or the like, but this is time-consuming and requires curing until the caulking material hardens, which leads to a longer construction period.

Special Publication No. 56-15874

The object of the present invention is to provide a through-electrode member, a storage box, and a wireless power supply system for vehicles that can electrically connect wiring inside and outside the box body while reliably preventing water from entering the inside of the box body, and that can facilitate construction and shorten the construction period.

In order to solve the above problems, the present invention employs the following means.
That is, the through electrode member of the present invention is a through electrode member provided in a through hole formed in a wall portion of a box body capable of accommodating an electrical device inside, and includes a screw shaft portion and a head formed at one end of the screw shaft portion, the screw shaft portion being inserted into the through hole, and a bolt formed of a conductive material, a nut formed of a conductive material and attached to the screw shaft portion on the opposite side of the head of the bolt across the wall portion, a first seal ring sandwiched between the head of the bolt and the wall portion and through which the screw shaft portion is inserted, a ring-shaped first terminal sandwiched between the head of the bolt and the first seal ring, a first wiring is connected, and the screw shaft portion is inserted, a second seal ring sandwiched between the nut and the wall portion and through which the screw shaft portion is inserted, and a ring-shaped second terminal sandwiched between the nut and the second seal ring, a second wiring is connected, and the screw shaft portion is inserted.

According to this configuration, the first wiring and the second wiring, which are arranged on either side of the wall of the box body, are electrically connected via the first terminal, the bolt, the nut, and the second terminal. The first seal ring and the second seal ring are sandwiched between the first terminal and the wall surface, preventing water from entering the inside of the box from the outside through the through hole in the wall. In addition, since watertightness is ensured by simply sandwiching the first seal ring and the second seal ring and tightening the bolt and nut, construction can be easily performed in a short construction period. In this way, it is possible to electrically connect the wiring inside and outside the box body while reliably preventing water from entering the inside of the box body, and to facilitate construction in a short construction period.

In one aspect of the present invention, the through electrode member of the present invention is formed such that the first seal ring and the second seal ring are made of a material that is elastically deformable in the axial direction of the threaded shaft portion when the bolt and the nut are fastened.

With this configuration, the first seal ring and the second seal ring are elastically deformed and compressed in the axial direction of the screw shaft portion by fastening the bolt and nut. This allows the first seal ring and the second seal ring to be tightly attached to the wall surface and the first terminal and second terminal. Therefore, high sealing performance can be easily ensured in the area where the through electrode member is provided.

In one aspect of the present invention, the through electrode member of the present invention further includes a caulking portion having water-stopping properties, which is formed at the boundary between at least one of the first seal ring and the second seal ring and the wall portion.

With this configuration, a higher level of watertightness can be ensured by the caulking portion formed at the boundary between at least one of the first and second seal rings and the wall portion.

The storage box of the present invention is characterized by having a hollow box body capable of storing electrical equipment therein, and a through electrode member as described above.

With this configuration, the wiring can be electrically connected inside and outside the box body via the penetrating electrode member. This makes it possible to electrically connect the wiring inside and outside the box body while reliably preventing water from entering the inside of the box body, and also makes it possible to simplify construction and shorten the construction period.

The wireless power supply system for vehicles of the present invention is characterized by comprising a road surface forming member that forms the running surface of a road on which a vehicle runs, a power transmission electrode that is provided below the running surface and wirelessly supplies power to the vehicle, the housing box as described above that is embedded in the road surface forming member, and electrode wiring that connects the electrical device in the housing box to the power transmission electrode via the through electrode member.

With this configuration, the electrode wiring and the electrical equipment arranged inside the storage box can be electrically connected via the penetrating electrode member. This makes it possible to provide a wireless power supply system for vehicles equipped with a storage box that can electrically connect the wiring inside and outside the box body while reliably preventing water from entering the inside of the box body, and can facilitate construction and shorten the construction period.

In one aspect of the present invention, the wireless power supply system for a vehicle of the present invention further includes a ground wiring that connects the electrical device in the housing box to a ground part outside the housing box via another of the through electrode members.

With this configuration, the ground wiring arranged outside the storage box and the electrical equipment arranged inside the storage box can be electrically connected via another through-hole electrode member while ensuring watertightness.

This invention makes it possible to electrically connect the external wiring of the box to the internal wiring while reliably preventing water from entering the inside of the box body, and also makes it possible to simplify construction and shorten the construction period.

1 is a cross-sectional view showing a configuration of a wireless power supply system for a vehicle according to an embodiment of the present invention. 2 is a diagram showing a housing box provided in the vehicle wireless power supply system of FIG. 1, and is a cross-sectional view taken along the line II in FIG. 1. 3 is a cross-sectional view showing a configuration of a through electrode member provided in the housing box of FIG. 2. 10 is a cross-sectional view showing a configuration of a modified example of a through electrode member according to an embodiment of the present invention. FIG.

Below, with reference to the attached drawings, the embodiments for implementing the through electrode member, the housing box, and the wireless power supply system for vehicles according to the present invention will be described based on the drawings.

FIG. 1 is a cross-sectional view showing a configuration of a wireless power supply system for a vehicle according to an embodiment of the present invention.
The wireless power supply system 1 for a vehicle shown in Fig. 1 wirelessly supplies power to a vehicle 100 traveling on a road 2. The vehicle 100 to be supplied with power is, for example, an electric vehicle. The road 2 is, for example, a road such as a highway or a general road. The vehicle 100 travels on a traveling surface F of the road 2 along an extension direction Da of the road 2. The wireless power supply system 1 for a vehicle mainly includes a road surface forming member 3 that forms the road 2, a power transmission electrode 5, a housing box 20, and a power supply device 60.

FIG. 2 is a diagram showing a housing box provided in the vehicle wireless power supply system of FIG. 1, and is a cross-sectional view taken along the line II in FIG.
2, the road surface forming member 3 mainly comprises a surface layer 4, a roadbed 6, and a ground portion (ground contact portion) 7. The surface layer 4, the roadbed 6, and the ground portion 7 are layered from top to bottom.

The surface layer 4 forms the running surface F on which the vehicle 100 runs. The surface layer 4 is preferably made of a material that has a strength that can withstand the weight of the vehicle 100 and vibrations during running, and is relatively thin in terms of efficiency reduction. The surface layer 4 is preferably made of a material with low water absorption. Such a surface layer 4 is made of a material in which at least one of ceramic materials and silicon materials (e.g., glass) is mixed as an aggregate into an asphalt material or cement-based material. Here, the aggregate to be mixed into the asphalt material or cement-based material is not limited to ceramic materials and silicon materials, and a material having at least one of a relative dielectric constant and a dielectric loss tangent smaller than that of a general aggregate can also be used. In addition to these, asphalt materials, concrete materials, ceramic materials, plastics, polystyrene foam, etc. can be applied as the surface layer 4. In addition, when the surface layer 4 is made of these materials, the surface layer 4 may not only be made of a single material, but may also be made of a multi-layer or composite of multiple materials. Additionally, the surface layer 4 may be made of a material with low electrical resistance, such as concrete mixed with a highly conductive material such as metal fibers.

The roadbed 6 is disposed below the power transmission electrode 5. The roadbed 6 has a predetermined thickness in the vertical direction. The roadbed 6 is preferably formed from an insulating material with low dielectric loss. The roadbed 6 is preferably permeable to allow water to pass from above to below. Specifically, the roadbed 6 is preferably formed from gravel material containing at least one of a ceramic material (e.g., ceramics) and a silicon-based material (e.g., glass). The roadbed 6 may be made of only gravel material of a ceramic material, only gravel material of a silicon-based material, or a mixture of gravel material of a ceramic material and gravel material of a silicon-based material. The roadbed 6 may further contain other materials in addition to the above materials. The roadbed 6 may also contain crushed stone as another material. In addition to the above materials, the roadbed 6 may also include a roadbed support unit disposed below the above materials, supporting the above materials from below, and having a flow path for allowing water to pass from above to below. In order to drain water that passes through the roadbed 6 and accumulates below it outside the road, drainage pipes (not shown) that connect to storm water drainage pipes, for example, may be installed below the roadbed 6 at certain sections of the road.

The ground portion 7 is disposed below the roadbed 6. The ground portion 7 supports the roadbed 6 from below. The ground portion 7 is, for example, a supporting ground.
The specific materials and configurations of the surface layer 4, roadbed 6, and ground portion 7 can be changed as appropriate.

The power transmission electrode 5 is disposed below the running surface F. In this embodiment, the power transmission electrode 5 is disposed below the surface layer 4. As shown in FIG. 1, the power transmission electrodes 5 are disposed in pairs at an interval in the width direction Dw (direction intersecting the extension direction Da) of the running surface F. As the pair of power transmission electrodes 5, a first conductor 5A and a second conductor 5B are disposed at an interval in the width direction Dw. The first conductor 5A and the second conductor 5B are insulated from each other by the roadbed 6. The roadbed 6 suppresses dielectric loss occurring between the power transmission electrodes 5 (first conductor 5A, second conductor 5B) and the ground portion 7.
The first conductor 5A and the second conductor 5B are formed in a plate shape or a sheet shape. The first conductor 5A and the second conductor 5B are power transmission paths for wireless power supply, and extend, for example, in a strip shape along the extension direction Da of the running path 2. The first conductor 5A and the second conductor 5B have a predetermined length in the extension direction Da. A plurality of pairs of the first conductor 5A and the second conductor 5B are arranged side by side along the extension direction Da.

The first conductor 5A and the second conductor 5B are formed from a metal material such as iron, aluminum, stainless steel, etc., with a thickness sufficient to meet the skin depth of high-frequency power. The surfaces of the first conductor 5A and the second conductor 5B are covered with a waterproof coating (not shown). The waterproof coating (not shown) is formed from an appropriate publicly known waterproof material, such as waterproof rubber.

In the example of FIG. 2, the first conductor 5A and the second conductor 5B are buried, for example, in the boundary between the roadbed 6 and the surface layer 4. The first conductor 5A and the second conductor 5B may be buried in the surface layer 4. The first conductor 5A and the second conductor 5B may also be buried in the roadbed 6.

The storage box 20 is embedded in the road surface forming member 3. As shown in FIG. 1, the storage box 20 is disposed between the first conductor 5A and the second conductor 5B that are adjacent to each other in the extension direction Da. The storage box 20 is disposed between each pair of the first conductor 5A and the second conductor 5B in the width direction Dw. The storage box 20 supplies power transmitted from the power supply device 60 to the first conductor 5A and the second conductor 5B.

The power supply device 60 supplies power supplied from an external general power distribution network or the like to each storage box. The power supply device 60 includes a transformer 61, a high-frequency power source 62, and a power supply control unit 63. The transformer 61 transforms the voltage of the power supplied from the outside into a predetermined voltage to be input to the high-frequency power source 62. The high-frequency power source 62 generates high-frequency power in a specified frequency range from the power input from the transformer 61. The power supply control unit 63 supplies the high-frequency power input from the high-frequency power source 62 via the storage box 20 to the first conductor 5A and the second conductor 5B located in front of and behind the storage box 20. The power supply device 60 may distribute and supply power to multiple storage boxes 20 arranged on the travel path 2.

The power supply device 60 and the housing box 20 are connected via a power supply wiring 65. The housing box 20 and the first conductor 5A and the second conductor 5B are connected via electrode wiring 82.

As shown in FIG. 2 , the storage box 20 includes a box body 21 , a lid 22 , and a through electrode member 30 .
The box body 21 has a side wall 23a and a bottom wall 23b as the wall portion 23. The side wall 23a is tubular and extends in the vertical direction. The bottom wall 23b is disposed along a plane intersecting the vertical direction and closes the lower side of the side wall 23a. As a result, the box body 21 is formed in a bottomed tubular shape having an opening at the top. Such a box body 21 is formed from an insulating material such as a concrete-based material or a resin-based material. The box body 21 is preferably formed from a highly insulating polymer material such as polyolefin, polyester, polyvinyl chloride, acrylic resin, and natural rubber because of its high insulating properties.

It is also preferable to suppress the occurrence of condensation by placing moisture-proof insulation material (not shown) on the inner peripheral surface of the box body 21. It is also preferable to suppress the occurrence of condensation by placing insulation material with low water absorption, such as ceramic crushed stone, on the bottom wall 23b of the box body 21.

The lid 22 closes the opening at the top of the box body 21. The lid 22 is configured to be openable (detachable) relative to the opening of the box body 21. The lid 22 is positioned so that it is exposed to the running surface F. A waterproof seal packing or the like is positioned between the lid 22 and the opening of the box body 21.

The box body 21 of the storage box 20 can accommodate an electric device 40. In this embodiment, the box body 21 accommodates, as the electric device 40, an impedance matching circuit that adjusts the impedance of the high-frequency power supplied from the power supply device 60 to match the first conductor 5A and the second conductor 5B. Here, the specific configuration of the impedance matching circuit is not limited. The electric device 40 accommodated in the box body 21 is not limited to an impedance matching circuit, and other electric devices may be accommodated as appropriate. For example, any one of the transformer 61, high-frequency power source 62, and power supply control unit 63 shown as the configuration example of the power supply device 60 described above, or any combination of these, may be accommodated as the electric device 40.

The power supply wiring 65 that supplies power to the electrical equipment 40 inside the box body 21 is led into the box body 21 through the side wall 23a. The power supply wiring 65 has an insulating coating 65s. The power supply wiring 65 is directly connected to the electrical equipment 40. A ring-shaped waterproof connector 68 or the like is arranged at the portion where the power supply wiring 65 penetrates the side wall 23a to ensure watertightness.

The through electrode member 30 connects the electrical device 40 in the box body 21 and the box external wiring (second wiring) 80 outside the box body 21. In this embodiment, the above-mentioned electrode wiring 82 and the ground wiring 83 are arranged as the box external wiring 80. Accordingly, in this embodiment, the storage box 20 is provided with a plurality of through electrode members 30. Among the plurality of through electrode members 30, the first through electrode member 30A connects the electrode wiring 82 and the electrical device 40. In this embodiment, the electrode wiring 82 is connected to each of two sets of the first conductor 5A and the second conductor 5B arranged in the front and rear of the extension direction Da with respect to the storage box 20. That is, a total of four electrode wirings 82 are provided. In order to connect each electrode wiring 82 to the electrical device 40 in the box body 21, a total of four first through electrode members 30A are provided. Note that the electrode wirings 82 may be provided in two for each of the first conductor 5A and the second conductor 5B. In this case, a total of eight pairs of electrode wirings 82 and first through electrode members 30A are provided.
Further, the second through electrode member (another through electrode member) 30B connects the ground wiring 83 grounded to the ground portion 7 to the electric device 40 .

Inside the box body 21, multiple in-box wirings (first wirings) 42 are arranged to connect the electrical equipment 40 and each penetrating electrode member 30. In this embodiment, the multiple in-box wirings 42 include a first in-box wiring 42A and a second in-box wiring 42B. The first in-box wiring 42A connects the electrical equipment 40 and the first penetrating electrode member 30A. The second in-box wiring 42B connects the electrical equipment 40 and the second penetrating electrode member 30B.

Each penetrating electrode member 30 (first penetrating electrode member 30A, second penetrating electrode member 30B) is arranged on the wall portion 23 (side wall 23a and bottom wall 23b) of the box body 21. The first penetrating electrode member 30A is arranged on the side wall 23a of the box body 21. The second penetrating electrode member 30B is arranged on the bottom wall 23b of the box body 21.

FIG. 3 is a cross-sectional view showing the configuration of a through electrode member provided in the housing box of FIG.
As shown in FIG. 3 , each through electrode member 30 includes a bolt 31 , a nut 32 , a first seal ring 33 , a second seal ring 34 , a first terminal 35 , and a second terminal 36 .

The bolt 31 has a threaded shaft portion 31a having a male screw groove formed on the outer circumferential surface thereof, and a head portion 31b formed at one end of the threaded shaft portion 31a, which are integral with the threaded shaft portion 31a. The head portion 31b has a larger outer diameter than the threaded shaft portion 31a. The head portion 31b of the bolt 31 is disposed, for example, on the inner side of the box body 21 with respect to the wall portion 23. The threaded shaft portion 31a of the bolt 31 is inserted into a through hole 25 formed in the wall portion 23 (side wall 23a, bottom wall 23b) of the box body 21.
The nut 32 is disposed on the opposite side of the wall portion 23 to the head 31b of the bolt 31, i.e., on the outside of the box body 21. The nut 32 is attached (screwed) to the screw shaft portion 31a. The bolt 31 and the nut 32 are made of a conductive material such as a metal.
Here, the head 31b of the bolt 31 is disposed on the inner side of the box body 21, and the nut 32 is disposed on the outer side of the box body 21, but is not limited to this. The head 31b of the bolt 31 may be disposed on the outer side of the box body 21, and the nut 32 may be disposed on the inner side of the box body 21.

The first seal ring 33 is sandwiched between the head 31b of the bolt 31 and the wall portion 23. The second seal ring 34 is sandwiched between the nut 32 and the wall portion 23. The first seal ring 33 and the second seal ring 34 are each annular, with the screw shaft portion 31a inserted into the inside. The first seal ring 33 and the second seal ring 34 are made of a material that is electrically insulating and elastic enough to be elastically deformed in the axial direction of the screw shaft portion 31a when the bolt 31 and the nut 32 are fastened. The first seal ring 33 and the second seal ring 34 are made of, for example, a rubber-based material, a silicon-based material, or the like.

The first terminal 35 is sandwiched between the head 31b of the bolt 31 and the first seal ring 33. The first terminal 35 is made of a conductive material such as metal. The box internal wiring 42 (first box internal wiring 42A, second box internal wiring 42B) is connected to the first terminal 35 by crimping, screw fastening, welding, etc. The first terminal 35 is annular, and the screw shaft portion 31a of the bolt 31 is inserted into its inside.

The second terminal 36 is sandwiched between the nut 32 and the second seal ring 34. The second terminal 36 is made of a conductive material such as metal. The box external wiring 80 (electrode wiring 82, ground wiring 83) is connected to the second terminal 36 by crimping, screw fastening, welding, etc. The second terminal 36 is annular, and the screw shaft portion 31a of the bolt 31 is inserted into its inside.

In such a penetrating electrode member 30, the bolt 31 and nut 32 are fastened with a predetermined fastening force (fastening torque). As a result, the first seal ring 33 and the second seal ring 34 are elastically deformed and compressed in the axial direction of the screw shaft portion 31a (the left-right direction on the paper in FIG. 3), and the first seal ring 33 and the second seal ring 34 are pressed against the wall portion 23 and the first terminal 35 and second terminal 36.

According to the above-described penetrating electrode member 30 and the storage box 20, the screw shaft portion 31a and the head portion 31b formed at one end of the screw shaft portion 31a are inserted into the through hole 25 formed in the wall portion 23 of the box body 21 capable of storing the electrical device 40 inside, and the bolt 31 made of a conductive material and the nut 32 made of a conductive material are attached to the screw shaft portion 31a on the opposite side of the wall portion 23 to the head portion 31b of the bolt 31, and are sandwiched between the head portion 31b of the bolt 31 and the wall portion 23. , a first seal ring 33 through which the screw shaft portion 31a is inserted, a ring-shaped first terminal 35 that is sandwiched between the head 31b of the bolt 31 and the first seal ring 33, to which the box internal wiring 42 is connected and through which the screw shaft portion 31a is inserted, a second seal ring 34 that is sandwiched between the nut 32 and the wall portion 23 and through which the screw shaft portion 31a is inserted, and a ring-shaped second terminal 36 that is sandwiched between the nut 32 and the second seal ring 34, to which the box external wiring 80 is connected and through which the screw shaft portion 31a is inserted.

According to this configuration, the box inside wiring 42 and the box outside wiring 80 arranged on either side of the wall 23 of the box body 21 are electrically connected via the first terminal 35, the bolt 31, the nut 32, and the second terminal 36. The first seal ring 33 and the second seal ring 34 are sandwiched between the first terminal 35, the second terminal 36, and the wall 23, so that water is prevented from entering the inside of the box body 21 from the outside through the through hole 25 of the wall 23. In addition, since watertightness is ensured by simply sandwiching the first seal ring 33 and the second seal ring 34 and tightening the bolt 31 and the nut 32, construction can be easily performed in a short construction period. In this way, it is possible to electrically connect the wiring inside and outside the box body 21 while reliably preventing water from entering the inside of the box body 21, and to facilitate construction and shorten the construction period.
Furthermore, by using the bolts 31 and nuts 32, a large cross-sectional area can be easily ensured for the portion through which high frequency power flows.

In addition, the first seal ring 33 and the second seal ring 34 are formed from a material that is elastically deformable in the axial direction of the screw shaft portion 31a when the bolt 31 and the nut 32 are fastened together.
According to this configuration, the first seal ring 33 and the second seal ring 34 are elastically deformed and compressed in the axial direction of the screw shaft portion 31a by fastening the bolt 31 and the nut 32. This allows the first seal ring 33 and the second seal ring 34 to be tightly attached to the wall portion 23, the first terminal 35, and the second terminal 36. Therefore, high sealing performance can be easily ensured in the portion where the through electrode member 30 is provided.

The vehicle wireless power supply system 1 as described above includes a road surface forming member 3 that forms the running surface F of the road 2 of the vehicle 100, a power transmission electrode 5 that is provided below the running surface F and wirelessly supplies power to the vehicle 100, a storage box 20 embedded in the road surface forming member 3, and electrode wiring 82 that connects the electrical device 40 in the storage box 20 to the power transmission electrode 5 via the first through electrode member 30A.

According to this configuration, the electrode wiring 82 arranged outside the storage box 20 and the electric device 40 arranged inside the storage box 20 can be electrically connected via the first penetrating electrode member 30A. This makes it possible to provide a vehicle wireless power supply system 1 including a storage box 20 that can electrically connect wiring inside and outside the box body 21 while reliably preventing water from entering the inside of the box body 21, and can facilitate construction and shorten the construction period.
In addition, in the vehicle wireless power supply system 1, the power transmitting electrode 5 is disposed in a position close to the running surface F, and therefore the electrode wiring 82 connecting the power transmitting electrode 5 and the electric device 40 is easily wetted by rainwater that has infiltrated into the road surface forming member 3. For this reason, rainwater easily reaches the first penetrating electrode member 30A by running down the surface of the electrode wiring 82. In response to this, by improving the water stopping property of the first penetrating electrode member 30A, it is possible to effectively suppress the intrusion of water into the box body 21.
Furthermore, in the vehicle wireless power supply system 1, when the vehicle 100 runs on the running surface F, vibrations are easily transmitted to the first through electrode member 30A via the road surface forming member 3. By introducing a connection structure using the bolt 31 and the nut 32 to such a first through electrode member 30A, it is possible to realize a connection structure that is strong against vibrations as well as water.

In addition, the vehicle wireless power supply system 1 further includes a ground wiring 83 that connects the electrical device 40 in the housing box 20 and the ground portion 7 outside the housing box 20 via the second through electrode member 30B.
According to this configuration, the grounding wiring 83 arranged outside the storage box 20 and the electrical equipment 40 arranged inside the storage box 20 can be electrically connected via the second penetrating electrode member 30B while ensuring watertightness.

(Modification of the embodiment)
The through electrode member, the housing box, and the wireless power supply system for a vehicle of the present invention are not limited to the above-described embodiment explained with reference to the drawings, and various modifications are possible within the technical scope.
For example, as shown in Fig. 4, in addition to the configuration shown in the above embodiment, a caulking portion 38 may be formed at the boundary between at least one of the first seal ring 33 and the second seal ring 34 and the wall portion 23. The caulking portion 38 is formed by applying a caulking material having a water-stopping property to the boundary between the outer periphery of the first seal ring 33 or the second seal ring 34 and the wall portion 23. The caulking portion 38 may be formed by applying a caulking material having a water-stopping property to the boundary between the wall portion 23 and the surface of the first seal ring 33 or the second seal ring 34 facing the wall portion 23.

With this configuration, a higher watertightness can be ensured by the caulking portion 38 formed at the boundary between at least one of the first seal ring 33 and the second seal ring 34 and the wall portion 23.

(Other Modifications)
In addition, in the above embodiment, electrode wiring 82 and ground wiring 83 are given as examples of the box external wiring 80 connected using the penetrating electrode member 30, but the number of wirings connected using the penetrating electrode member 30, the type (application) of the wiring, and the number of wirings can be changed as appropriate.
In the above embodiment, the upper portion (the lid 22) of the storage box 20 is exposed above the traveling surface F, but this is not limited to this. The storage box 20 may be entirely buried in the road surface forming member 3.
Furthermore, the purpose, type, number, structure, etc. of the electrical equipment 40 housed in the housing box 20 can be changed as appropriate.

The through electrode member 30 and the housing box 20 shown in the above embodiment can also be used for purposes other than the vehicle wireless power supply system 1.

In addition, the configuration of each part of the vehicle wireless power supply system 1, for example the configuration and control contents of the power supply control unit 63, can be changed as appropriate.

In the above embodiment, the vehicle 100 to be supplied with power is not limited to an electric vehicle, but may be, for example, an electric cart, an electric forklift, an electric automated guided vehicle (AGV), a vehicle for a new urban transportation system, a robot for transporting goods, etc. The running path 2 is also not limited to a road, but may be a running path for an AGV, a track for a new urban transportation system, a track for a robot, etc.
In addition, the configurations described in the above embodiments can be selected or changed as appropriate without departing from the spirit of the present invention.

1 Wireless power supply system for vehicle 2 Road 3 Road surface forming member 5 Power transmission electrode 7 Ground part (ground part)
20: Storage box 21: Box body 23: Wall portion 25: Through hole 30: Through electrode member 30A: First through electrode member 30B: Second through electrode member (another through electrode member)
31 Bolt 31a Screw shaft portion 31b Head portion 32 Nut 33 First seal ring 34 Second seal ring 35 First terminal 36 Second terminal 38 Caulking portion 40 Electrical device 42 Box internal wiring (first wiring)
80 Box outside wiring (second wiring)
82 Electrode wiring 83 Ground wiring 100 Vehicle F Running surface

Claims (4)

A road surface forming member that forms a running surface of a road for a vehicle;
a power transmission electrode provided below the traveling surface and configured to wirelessly supply power to the vehicle;
a storage box embedded in the road surface forming member, the storage box having a hollow box body capable of storing electrical equipment therein , and a through electrode member provided in a through hole formed in a wall portion of the box body ;
an electrode wiring that connects the electric device in the housing box and the power transmitting electrode via the through electrode member;
Equipped with
The through electrode member is
a bolt having a screw shaft portion and a head portion formed at one end of the screw shaft portion, the screw shaft portion being inserted into the through hole, and the bolt being made of a conductive material;
a nut attached to the screw shaft portion on the opposite side of the head of the bolt across the wall portion, the nut being made of a conductive material;
A first seal ring is sandwiched between the head and the wall portion of the bolt and through which the screw shaft portion is inserted;
a first terminal having an annular shape, the first terminal being sandwiched between the head of the bolt and the first seal ring, the first wiring being connected thereto, and the screw shaft portion being inserted therethrough;
A second seal ring is sandwiched between the nut and the wall portion and has the screw shaft portion inserted therethrough;
a second annular terminal that is sandwiched between the nut and the second seal ring, to which a second wiring is connected and through which the screw shaft portion is inserted. 2. The wireless power supply system for a vehicle according to claim 1, wherein the first seal ring and the second seal ring are formed from a material that is elastically deformable in an axial direction of the threaded shaft portion when the bolt and the nut are fastened together. The through electrode member is
3. The wireless power supply system for a vehicle according to claim 1, further comprising a water-stopping caulking portion formed at a boundary between at least one of the first seal ring and the wall portion and the wall portion . The wireless power supply system for a vehicle according to any one of claims 1 to 3, further comprising a grounding wiring that connects the electrical device in the storage box and a grounding portion outside the storage box via another of the through electrode members.

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