JP5958423B2 - Non-contact power supply pad manufacturing method, non-contact power supply pad manufactured by the manufacturing method, and forklift non-contact charging system using the non-contact power supply pad - Google Patents

Description

  The present invention relates to a contactless power supply pad that generates or receives magnetic flux, and more particularly, a contactless power supply pad that transmits power by inductive power transfer (IPT) and has a low profile and a substantially planar shape. And a contactless power supply pad manufactured by the manufacturing method, and a contactless charging system for a forklift using the contactless power supply pad.

  An example of a pad provided with a contactless charging system using inductive power transfer (IPT) and a primary or secondary winding for inductive power transfer is disclosed in Patent Document 1. The power transmission pad disclosed in Patent Document 1 is mounted on an electric vehicle as a device for picking up power (that is, a secondary winding of a non-contact charging system) and supplies power to the secondary side. It is fixed to the garage floor as a device (ie primary winding). This power transmission pad is configured by arranging eight ferrite bars radially at equal intervals in a circular case made of aluminum, and forming a spiral coil so as to cross the center of the upper surface of each ferrite bar. The magnetic flux path is formed in each ferrite bar by the voltage applied to the coil. Specifically, the magnetic flux jumps upward from one end portion of the ferrite bar, propagates so as to enter perpendicularly to the other end portion of the ferrite bar through the upper surface of the pad. Therefore, it is considered that the magnetic flux path has a shape close to an ellipse including the coil. Note that magnetic flux does not pass through the rear surface of the pad because it is hindered by the aluminum circular case.

  In the power transmission pad described above, actually, eight ferrite bars each provide a magnetic flux pattern. At the highest position of each of these flux patterns, the flux lines are essentially horizontal. However, this horizontal magnetic flux is relatively close to the pad (extending from the pad by about a quarter of the pad diameter), and there is no horizontal magnetic flux at the very center of the pad (the highest magnetic flux density). The location is ideally the center of the pad, but at the center of the pad, in practice, the available horizontal flux component is zero). Thus, if the secondary pad is not accurately positioned above the primary pad, power is not effectively induced in the secondary winding, and the relative position of the electric vehicle pad and the ground pad There was a problem that had to be controlled precisely. In addition, since the diameter of the power transmission pad disclosed in Patent Document 1 is 400 mm and the thickness is about 25 mm, the primary side and the secondary side pad are usually set to 50 mm or less between the primary side and the primary side. The side and secondary pads had to be perfectly aligned.

  An example of a power transmission pad that solves such a problem is disclosed in Patent Document 2. The pad disclosed in Patent Document 2 is configured by setting a magnetic pole region at each end of a magnetically permeable magnetic core and winding a coil in a planar and spiral manner around each magnetic pole region. . By forming the coil in this way, the magnetic flux that enters the pad from one magnetic pole region is transmitted to the other magnetic pole region through the magnetic core, and then leaves the pad from the other magnetic pole region and passes through the air. To one of the magnetic pole regions. The magnetic flux path thus formed is essentially above the front surface of the pad and forms a looped arch in space beyond the front surface of the pad. This provides a significant horizontal magnetic flux component at a significant distance above the front surface of the pad. Therefore, even if the vertical position of the pad of the electric vehicle with respect to the ground pad is slightly deviated and the position in the horizontal direction is slightly deviated, power can be supplied effectively.

  Patent Document 3 discloses a contactless charging system that supplies power (charges) to a forklift battery in a contactless manner. In the non-contact charging system disclosed in Patent Document 3, a magnetic field is generated by applying an AC voltage from an AC power source to a coiled electric wire laid below a floor surface at a predetermined position, and the body of the forklift is generated by the magnetic field. Inductive voltage (alternating current voltage) is induced in the cored winding projecting below the lower part of the wire.

International Publication No. 2008/140333 International Publication No. 2010/090539 JP-A-6-86470 (FIG. 3)

  When the power transmission pad disclosed in Patent Document 2 is actually used, it can be considered that the magnetic core and two coils are housed in a housing. In this case, when the power transmission pad is manufactured, the magnetic core needs to be positioned on the floor surface in the housing. This is because if the magnetic core is not positioned, the relative position between the magnetic core and the two coils may deviate from a predetermined position when the coil is disposed on the upper surface of the magnetic core. In this power transfer pad, one of the factors that determine the distance (feed range or feed distance) from the front surface of the power transfer pad that provides a significant horizontal magnetic flux component is the distance between the two magnetic pole regions, Since the magnetic pole region is set at the center or the center of each coil, it is important for the performance of the pad that the two coils are arranged at predetermined positions with respect to the magnetic core. However, since the power transmission pad disclosed in Patent Document 2 described above is not positioned on the floor surface in the housing, misalignment is likely to occur between the magnetic core and the two coils. It was difficult.

  Further, as described above, the pad disclosed in Patent Document 2 is likely to be misaligned between the magnetic core and each coil, and a desired power supply range or power supply distance may not be obtained. For this reason, if the pad disclosed in Patent Document 2 is used for the non-contact charging system of the forklift, the secondary side pad is not disposed within the power supply range of the primary side pad, and is therefore mounted on the forklift. There is a risk that the battery will not be charged.

  The present invention relates to a method for manufacturing a contactless power supply pad in which positional displacement between two coils and a magnetic body is unlikely to occur during manufacture of the contactless power supply pad, and a contactless power supply pad manufactured by the manufacturing method. And a non-contact charging system for a forklift using the non-contact power supply pad.

In order to achieve the above object, the invention described in claim 1 of the present invention is:
A magnetic body is arranged on the floor plate so that the magnetic material is positioned with respect to a first direction in which a magnetic flux path is to be formed and a second direction orthogonal to the first direction by a plurality of auxiliary members for positioning. Process,
Injecting an adhesive resin into a space surrounded by the floor plate and a side plate provided on the outer periphery of the floor plate;
Arranging the two coils side by side in the first direction such that the center of each of the two coils wound in a vortex overlaps the magnetic body;
Covering the space surrounded by the floor plate and the side plate with a lid;
It is characterized by comprising.

  According to the above method, during the manufacture of the non-contact power supply pad, the magnetic member is restricted to a desired position on the floor plate by the auxiliary member, so that the positional deviation between the coil and the magnetic body hardly occurs. This makes it easier to produce a contactless power supply pad with the desired performance. Moreover, according to the said method, a coil and a magnetic body are fixed with adhesive resin. Therefore, it is possible to provide a non-contact power supply pad that is less likely to be displaced between the coil and the magnetic body. Further, when a resin is used for fixing the magnetic body and the coil, the magnetic body may move due to the flow of the resin when the resin is injected. With respect to this problem, according to the above method, the auxiliary member regulates the position of the magnetic body when the resin is injected, and the magnetic body does not move due to the flow of the resin.

Invention of Claim 2 is invention of Claim 1, Comprising:
Before the step of placing the magnetic material,
A plurality of the first jigs provided with a plurality of first pins are brought close to a floor plate in which a plurality of first pin insertion openings are formed at positions corresponding to the plurality of first pins. Inserting the plurality of first pins into a one-pin insertion port and projecting the plurality of first pins from the floor plate ;
Attaching the auxiliary member to the plurality of first pins protruding from the floor board ,
After the step of covering the space surrounded by the floor plate and the side plate with a lid, the first jig is separated from the floor plate , and the plurality of first pins are inserted into the plurality of first pins. It is characterized by comprising a step of removing from the mouth.

  According to the above method, for example, the auxiliary member can be easily arranged at a predetermined position as compared with the case where the auxiliary member is fixed to the floor board with an adhesive resin or the like. Further, for example, when a floor board in which auxiliary members are integrally formed is used, equipment for producing such a floor board is required, but according to the above method, such equipment is unnecessary.

Invention of Claim 3 is invention of Claim 2, Comprising:
After the step of covering the space surrounded by the floor plate and the side plate with a lid,
A second jig in which a plurality of second pins are erected is brought close to a lid formed with a plurality of second pin insertion openings at a position corresponding to the plurality of second pin insertion openings. The plurality of second pins are inserted into a two-pin insertion port, and the plurality of second pins protrude into a space surrounded by the floor plate , the side plate, and the lid, thereby forming the two coils. Inserting the second pin into the auxiliary member at a plurality of locations deviating from the position where the conducting wire is disposed;
The step of separating the second jig from the lid and removing the plurality of second pins from the plurality of second pin insertion openings is provided.

  According to the above method, even when it is difficult to attach the auxiliary member vertically with only the first pin, the auxiliary member can be attached vertically by using the first pin and the second pin together.

Invention of Claim 4 is invention of Claim 2, Comprising:
Prior to the step of covering the space surrounded by the floor plate and the side plate with a lid, a plurality of second pin insertion ports are formed at positions corresponding to the plurality of second pin insertion ports. Including a step of approaching a second jig in which two pins are erected and inserting the plurality of second pins into the plurality of second pin insertion openings,
In the step of covering the space surrounded by the floor plate and the side plate with a lid, the floor plate and is projected a second pin of the plurality of the side plates and the enclosed by the lid space, to form the two coils respectively Inserting the second pin into the auxiliary member at a plurality of locations away from the position where the conducting wire is disposed,
After the step of covering the space surrounded by the floor plate and the side plate with a lid, the step of separating the second jig from the lid and removing the plurality of second pins from the plurality of second pin insertion openings. It is characterized by having.

  According to the above method, even when it is difficult to attach the auxiliary member vertically with only the first pin, the auxiliary member can be attached vertically by using the first pin and the second pin together.

The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein in the step of arranging the magnetic body, a plurality of magnetic bodies are brought into contact with each other in the first direction. It is characterized by arranging.
When an existing magnetic material is used when manufacturing a contactless power supply pad, it is necessary to use a plurality of magnetic materials when a desired power supply range or power supply distance cannot be obtained by using only one magnetic material. . According to the above method, even when a plurality of magnetic bodies are required to form a desired magnetic flux path, a plurality of magnetic bodies are restricted to a desired position on the floor plate during the manufacture of the contactless power supply pad. Therefore, the plurality of magnetic bodies are unlikely to fall apart. Therefore, since the positional deviation between the coil and the magnetic body is less likely to occur during the manufacture of the contactless power supply pad, it is easy to manufacture the contactless power supply pad having the desired performance. Further, since a plurality of magnetic bodies are arranged in contact with each other in the direction in which the magnetic flux path passes, small-scale leakage magnetic flux can be prevented.

  Invention of Claim 6 is invention of any one of Claim 1 thru | or 5, Comprising: In the process of arrange | positioning a magnetic body, the said auxiliary member provided at intervals in the said 2nd direction According to the above, a plurality of magnetic bodies are arranged at intervals in the second direction. According to this method, even when a plurality of magnetic bodies are required to form a desired magnetic flux path, a plurality of magnetic bodies are restricted to a desired position on the floor plate during the production of the contactless power supply pad. Therefore, the plurality of magnetic bodies are unlikely to fall apart. Therefore, since the positional deviation between the coil and the magnetic body is less likely to occur during the manufacture of the contactless power supply pad, it is easy to manufacture the contactless power supply pad having the desired performance.

  The invention according to claim 7 is the invention according to any one of claims 1 to 5, wherein in the step of arranging the magnetic body, a plurality of magnetic bodies are brought into contact with each other in the second direction. It is characterized by arranging. According to this method, even when a plurality of magnetic bodies are required to form a desired magnetic flux path, a plurality of magnetic bodies are restricted to a desired position on the floor plate during the production of the contactless power supply pad. Therefore, the plurality of magnetic bodies are unlikely to break apart. Therefore, since the positional deviation between the coil and the magnetic body is less likely to occur during the manufacture of the contactless power supply pad, it is easy to manufacture the contactless power supply pad having the desired performance. Furthermore, the non-contact power supply pad can be made compact (reduction in area).

  The invention according to an eighth aspect is the invention according to any one of the first to seventh aspects, wherein in the step of arranging the two coils, the height of the auxiliary member is set to be higher than the upper surface of the magnetic body. The two coils are arranged so that a part of each coil overlaps the auxiliary member at the same or lower position. According to this method, the arrangement of the coils is not restricted by the auxiliary member.

  The invention according to claim 9 is the invention according to any one of claims 1 to 8, wherein, in the step of arranging the two coils, the height of the auxiliary member is higher than the upper surface of the magnetic body. Further, the two coils are arranged so that the auxiliary member protrudes from a space formed in a central portion of each coil at a high place. According to this method, since the auxiliary member serves as a mark of the position where the coil is disposed during the manufacture of the contactless power supply pad, the positional deviation between the coil and the magnetic body is less likely to occur. Therefore, it is easier to manufacture a contactless power supply pad having the desired performance.

  The invention described in claim 10 is the invention described in claim 9, wherein the step of injecting the adhesive resin is performed after the step of arranging the two coils. . According to this method, since the auxiliary member regulates the position of the two coils during the manufacture of the contactless power feeding pad, the adhesive resin can be injected after the two coils are arranged.

Invention of Claim 11 is invention of any one of Claim 1 thru | or 10, Comprising: In the process of arrange | positioning the said 2 coil, the said of the whole area | region where the said magnetic body is arrange | positioned The portions wound around two or more stages of each coil are arranged outside both ends in the first direction, and the parts wound around one stage of each coil are arranged on the top surface of the magnetic body. It is characterized by that.
Since the power transmission pad disclosed in Patent Document 2 is configured by winding a coil in a planar and spiral manner around each magnetic pole region, the planar spread of the pad is large. Outer dimensions increase. On the other hand, according to the above method, the planar dimension of the pad can be shortened as compared with the pad in which the coil is wound in a horizontal row as disclosed in Patent Document 2 described above. Further, since the coil approaches the magnetic body outside both ends of the magnetic flux path passing through the magnetic body, the magnetomotive force of the magnetic body becomes strong and the performance is improved.

  The invention according to claim 12 is the invention according to any one of claims 1 to 11, wherein, in the step of arranging the magnetic body, the auxiliary member is inserted into a hole provided in the magnetic body. It is characterized by. According to this method, the area where the auxiliary member is disposed can be reduced, and the non-contact power supply pad can be made compact (area reduction).

  A thirteenth aspect of the present invention is the invention according to any one of the first to twelfth aspects of the present invention, wherein the magnetic material is formed at both ends in the first direction in the entire region where the magnetic body is disposed. The method further includes the step of arranging a second magnetic body in contact with the upper surface of the body. According to this method, the second magnetic body is provided in the magnetic pole region, the magnetomotive force of the magnetic body is increased, and the performance is improved.

  A fourteenth aspect of the invention is the invention of the twelfth aspect of the invention, in which a second portion in contact with the upper surface of the magnetic body at both ends in the first direction in the entire region where the magnetic body is disposed. A step of disposing the magnetic body, and when the second magnetic body is disposed, the auxiliary member protrudes from the upper surface of the magnetic body into the second hole provided in the second magnetic body. A member is inserted. According to this method, the second magnetic body is provided in the magnetic pole region, the magnetomotive force of the magnetic body is increased, and the performance is improved.

  A fifteenth aspect of the present invention is the invention according to any one of the first to fourteenth aspects, wherein the auxiliary member is provided in a region excluding a region where the conducting wires that respectively form the two coils are disposed. Is higher than the upper surface of the magnetic body. According to this method, when a load is applied to the lid of the non-contact power supply pad, the lid is supported by the auxiliary member, so that cracks and the like are less likely to occur.

  The invention according to claim 16 is the invention according to claim 15, characterized in that the height of the auxiliary member is higher than the upper surface of the magnetic body at the center of the floor board in the first direction. It is what. According to this method, when a load is applied to the lid of the contactless power supply pad, cracks and the like are less likely to occur.

In order to achieve the above-described object, the invention described in claim 17 is included in the present invention.
A housing including a floor plate, a side plate provided on an outer peripheral portion of the floor plate, and a lid covering a space surrounded by the floor plate and the side plate;
A magnetic body disposed on the floor board;
A plurality of auxiliary members surrounding the magnetic body;
Two coils each wound in a vortex, each coil overlapping with the magnetic body and arranged side by side in a first direction in which a magnetic flux path is formed;
An adhesive resin filled in a space surrounded by the floor plate and the side plate;
It is characterized by providing.

  According to the above configuration, a substantially planar pad having a low outer shape can be provided as a contactless power supply pad that generates or receives magnetic flux. Further, it is possible to provide a pad with little occurrence of positional deviation between the coil and the magnetic body.

  The invention described in claim 18 is the invention described in claim 17, characterized by comprising a plurality of magnetic bodies arranged in contact with each other in the first direction. According to this configuration, it is possible to provide a pad in which a plurality of magnetic bodies are arranged without variation. In addition, since a plurality of magnetic bodies are arranged in contact with each other in the direction in which the magnetic flux path passes, small-scale leakage magnetic flux can be prevented.

  The invention according to claim 19 is the invention according to claim 17 or 18, comprising a plurality of magnetic bodies arranged at intervals in a second direction orthogonal to the first direction. The auxiliary member is provided between the magnetic bodies. According to this configuration, it is possible to provide a pad in which a plurality of magnetic bodies are arranged without variation.

  A twentieth aspect of the invention is the invention of the seventeenth or eighteenth aspect, comprising a plurality of magnetic bodies arranged in contact with each other in a second direction orthogonal to the first direction. It is. According to this configuration, it is possible to provide a pad in which a plurality of magnetic bodies are arranged without variation. In addition, the non-contact power supply pad can be made compact (reduction in area).

  The invention according to claim 21 is the invention according to any one of claims 17 to 20, wherein the height of the auxiliary member is the same as or lower than the upper surface of the magnetic body. The two coils are arranged such that a part of each coil overlaps the auxiliary member. According to this configuration, the arrangement of the coils is not restricted by the auxiliary member.

  The invention according to claim 22 is the invention according to any one of claims 17 to 21, wherein the auxiliary member has a center higher than the top surface of the magnetic body at a center of each coil. The two coils are arranged so that the auxiliary member protrudes from a space formed in the portion. According to this configuration, it is possible to provide a pad with less occurrence of positional deviation between the coil and the magnetic body.

  A twenty-third aspect of the invention is the invention of any one of the seventeenth to twenty-second aspects, wherein the two coils are respectively wound in two or more stages in the vertical direction and in one stage. A portion wound around two or more stages of each coil is disposed outside both ends of the first direction in the entire region where the magnetic body is disposed; and A portion of each coil wound in one step is arranged on the upper surface of the magnetic body. According to this configuration, the planar dimensions of the pad can be shortened as compared with a pad in which coils are wound in a horizontal row as disclosed in Patent Document 2 described above. In addition, since the coil is close to the magnetic body outside both ends of the magnetic flux path passing through the magnetic body, the magnetomotive force of the magnetic body is increased and the performance is improved.

  A twenty-fourth aspect of the invention is the invention of any one of the seventeenth to twenty-third aspects, comprising an auxiliary member inserted into a hole provided in the magnetic body. is there. According to this structure, the area | region which arrange | positions an auxiliary member can be reduced, and it becomes possible to attain compactization (reduction of an area) of the pad for non-contact electric power feeding.

  Invention of Claim 25 is invention of any one of Claim 17 thru | or 24, Comprising: It arrange | positions at the both ends of the said 1st direction among the all areas | regions where the said magnetic body is arrange | positioned, And it is further provided with the 2nd magnetic body which touches the upper surface of the said magnetic body. According to this configuration, since the second magnetic body is provided in the magnetic pole region, the magnetomotive force of the magnetic body is increased and the performance is improved.

  The invention according to claim 26 is the invention according to claim 24, wherein the magnetic body is disposed at both ends in the first direction in the entire region where the magnetic body is disposed, and is formed on the upper surface of the magnetic body. A second magnetic body is further provided, and the auxiliary member protruding from the upper surface of the magnetic body is inserted into a second hole provided in the second magnetic body. . According to this configuration, since the second magnetic body is provided in the magnetic pole region, the magnetomotive force of the magnetic body is increased and the performance is improved.

  A twenty-seventh aspect of the invention is the invention according to any one of the seventeenth to twenty-sixth aspects, wherein the auxiliary member is provided in a region excluding a region where the conducting wires respectively forming the two coils are arranged. Is higher than the upper surface of the magnetic body. According to this configuration, when a load is applied to the lid of the non-contact power supply pad, the lid is supported by the auxiliary member, so that cracks and the like are less likely to occur.

  The invention according to claim 28 is the invention according to claim 27, wherein the auxiliary member is higher in height than the upper surface of the magnetic body at the center of the floor board in the first direction. It is what. According to this configuration, when a load is applied to the lid of the contactless power supply pad, cracks and the like are less likely to occur.

In order to achieve the above-mentioned object, the invention according to claim 29 of the present invention is
A primary non-contact power supply pad connected to an AC power source;
A non-contact power supply pad on the secondary side disposed on a forklift equipped with a battery;
A rectifier disposed on the forklift for rectifying a current sent from the non-contact power supply pad on the secondary side;
With
The contactless power supply pads on the primary side and the secondary side are the contactless power supply pads according to any one of claims 17 to 28,
The battery mounted on the forklift is charged by supplying power from the contactless power supply pad on the primary side to the contactless power supply pad on the secondary side in a contactless manner. .

  According to the above configuration, compared to the power transmission pad disclosed in Patent Document 2, the pad is less likely to be misaligned between the magnetic body and the coil, and a desired feeding range or feeding distance is easily obtained. Can be used to charge the battery mounted on the forklift more reliably.

  The invention described in claim 30 is the invention described in claim 29, wherein the secondary-side non-contact power supply pad is held in advance, and the primary-side non-contact power supply pad is held in the secondary side. The forklift is provided with a second housing provided with a pad storage portion that forms a space that can be stored facing the non-contact power supply pad on the side. According to this configuration, power can be reliably supplied to the battery of the forklift without contact regardless of the skill of the driver. In addition, the degree of freedom of arrangement of the non-contact power supply pad on the secondary side is improved. In addition, it is not necessary to embed a primary-side non-contact power supply pad in the ground or to be fixed to a wall or a pillar, thereby reducing the time and cost required for laying the primary-side non-contact power supply pad. it can.

  The invention according to a thirty-first aspect is the invention according to the twenty-ninth aspect, wherein the secondary-side non-contact power supply pad is fixed to a space inside the back cover of the forklift that covers the storage space of the battery. It is characterized by being. According to this configuration, since the non-contact power feeding pad on the secondary side can be installed inside the forklift, the non-contact power feeding pad on the secondary side is not exposed to the outside of the forklift, and the external environment It is possible to prevent the secondary-side non-contact power supply pad from being affected. Moreover, it becomes possible to install the non-contact electric power feeding pad on the secondary side using the empty space of the forklift.

In order to achieve the above-mentioned object, the invention described in claim 32 is included in the present invention.
A support base on which a wheel mounted on one side of the forklift can ride;
A primary non-contact power supply pad provided on the support base and connected to an AC power source;
A contactless power feeding pad on the secondary side disposed on the forklift equipped with a battery;
A rectifier disposed on the forklift for rectifying a current sent from the non-contact power supply pad on the secondary side;
With
The contactless power supply pad on the primary side is the contactless power supply pad according to claim 27 or 28,
The contactless power supply pad on the secondary side is the contactless power supply pad according to any one of claims 17 to 28,
The secondary side non-contact power supply pad is connected to the one side part of the forklift so that the power supplied from the primary side non-contact power supply pad can be received from below the one side part of the forklift. Is provided on the bottom or bottom of the
The battery mounted on the forklift is charged by supplying power from the contactless power supply pad on the primary side to the contactless power supply pad on the secondary side in a contactless manner. .

  According to the above configuration, compared to the power transmission pad disclosed in Patent Document 2, the pad is less likely to be misaligned between the magnetic body and the coil, and a desired feeding range or feeding distance is easily obtained. Can be used to charge the battery mounted on the forklift more reliably. In addition, even when a load is applied to the lid of the contactless power supply pad when the forklift rides on the support base, problems such as cracking of the contactless power supply pad are unlikely to occur. Moreover, since it is not necessary to embed the primary-side non-contact power supply pad in the ground, it is easy to lay the primary-side non-contact power supply pad, and the time and cost required for the laying can be reduced. . Further, even if the target for attaching the secondary-side non-contact power supply pad is an existing forklift, the secondary-side non-contact power supply pad may be disposed on the lower surface or lower part of one side of the forklift. Compared with the case where the secondary non-contact power supply pad provided on the lower surface or the lower portion of the vehicle body is disposed on the center line of the vehicle body (the center in the width direction of the vehicle body), Installation and maintenance are easy.

  The invention described in claim 33 is the invention described in claim 32, wherein the side plate of the non-contact power supply pad on the primary side is attached to the top plate covering the recess provided in the support base. The contactless power feeding pad on the primary side is suspended from the top plate in the recess. According to this configuration, even if a load is applied to the lid of the contactless power feeding pad when the forklift rides on the support base, problems such as cracking of the contactless power feeding pad are less likely to occur.

  According to the method for manufacturing a contactless power supply pad of the present invention, the magnetic body is regulated to a desired position on the floor plate during the manufacture of the contactless power supply pad. Therefore, the non-contact power supply pad manufacturing method according to the present invention has an effect that misalignment between the two coils and the magnetic body hardly occurs during the manufacture of the non-contact power supply pad. In addition, the non-contact power supply pad of the present invention has an effect that it is possible to provide a pad with less positional deviation between the coil and the magnetic body. Further, the non-contact charging system for forklifts of the present invention uses a pad that is not easily misaligned between the magnetic body and the coil, so that the secondary pad is not disposed within the power supply range of the primary pad. Therefore, there is an effect that the problem that the battery mounted on the forklift is not charged is less likely to occur.

It is a perspective view for demonstrating the manufacturing method of the pad for non-contact electric power feeding in embodiment of this invention. It is a perspective view for demonstrating the internal structure of the non-contact electric power feeding pad manufactured by the manufacturing method of the non-contact electric power feeding pad. It is a top view which shows the internal structure of the non-contact electric power feeding pad. It is sectional drawing of the pad for non-contact electric power feeding. It is a figure which shows an example of the primary side circuit in which the pad for the non-contact electric power feeding was integrated. It is a figure which shows an example of the secondary side circuit incorporating the pad for the non-contact electric power feeding. It is explanatory drawing which shows the magnetic flux path | route of the non-contact electric power feeding pad. It is a perspective view for demonstrating the internal structure of the modification 1 of the pad for the non-contact electric power feeding. It is a perspective view for demonstrating the internal structure of the modification 2 of the same non-contact electric power feeding pad. It is a perspective view for demonstrating the internal structure of the modification 3 of the pad for the non-contact electric power feeding. It is a perspective view for demonstrating the internal structure of the modification 4 of the same non-contact electric power feeding pad. It is a perspective view for demonstrating the internal structure of the modification 5 of the non-contact electric power feeding pad. It is a top view which shows the internal structure of the modification 5 of the non-contact electric power feeding pad. It is a perspective view for demonstrating the internal structure of the modification 6 of the same non-contact electric power feeding pad. It is a perspective view for demonstrating the internal structure of the modification 7 of the non-contact electric power feeding pad. It is a perspective view which shows the principal part of the non-contact charging system in embodiment of this invention. It is a side view which shows the principal part of the non-contact charging system. It is sectional drawing which shows an example of the support stand used with the non-contact charging system. It is sectional drawing which shows the other examples of the support stand used with the non-contact charging system. It is a perspective view which shows the principal part of the modification 1 of the non-contact charging system. It is a perspective view which shows the principal part of the modification 2 of the non-contact charging system. It is sectional drawing which shows the modification of the support stand used with the non-contact charging system. It is a perspective view which shows the principal part of the other example 1 of the non-contact charging system. It is a perspective view which shows the principal part of the other example 2 of the non-contact charging system. It is a perspective view which shows the principal part of the other example 3 of the non-contact charging system. It is a perspective view which shows the principal part of the other example 4 of the non-contact charging system. It is a partially expanded side view which shows the principal part of the other example 4 of the non-contact charging system. It is a perspective view which shows an example of the housing | casing used in the other example 5 of the non-contact charging system. It is a perspective view which shows the principal part of the other example 5 of the non-contact charging system. It is a perspective view which shows the principal part of the modification 1 of the other example 5 of the non-contact charging system. It is a perspective view which shows the principal part of the modification 2 of the other example 5 of the non-contact charging system. It is a perspective view which shows the principal part of the modification 3 of the other example 5 of the non-contact charging system. It is a figure which shows the modification of the housing | casing used in the other example 5 of the non-contact charging system. It is a perspective view which shows the principal part of the other example 6 of the non-contact charging system.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, duplicate description is omitted by assigning the same reference numerals to the same components. In addition, the drawings schematically show each component for easy understanding. The shape, material and number of each component shown in the following embodiments, the number of turns of the coil, the arrangement of auxiliary members and ferrite, etc. are merely examples and are not particularly limited. Various modifications can be made without departing from the scope. The combinations of the constituent elements shown in the following embodiments are merely examples, and are not particularly limited, and can be appropriately combined without departing from the effects of the present invention.

  Hereinafter, a method for manufacturing the contactless power feeding pad according to the present embodiment will be described with reference to FIG. FIG. 1 is a perspective view for explaining a method of manufacturing a contactless power feeding pad according to the present embodiment.

  First, a thin plate-like back plate made of a metal material such as aluminum on the surface of the first jig 1 provided with a plurality of first pins 2 to be erected and a plurality of side plate positioning pins 3 to be erected. Bring 4 closer. A plurality of through holes corresponding to the plurality of first pins 2 and a plurality of through holes corresponding to the plurality of side plate positioning pins 3 are formed in the back plate 4, and the first jig 1 and the back plate 4, the plurality of first pins 2 are inserted into the corresponding through holes and protrude from the back plate 4, and the plurality of side plate positioning pins 3 are the corresponding through holes. And protrudes from the back plate 4.

Next, the floor plate 5 made of, for example, resin is brought close to the surface of the back plate 4 from which the plurality of first pins 2 and the plurality of side plate positioning pins 3 protrude, and the floor plate 5 is arranged on the back plate 4. The floor plate 5 is formed with a plurality of through holes corresponding to the plurality of first pins 2 (an example of a first pin insertion port) and a plurality of through holes corresponding to the plurality of side plate positioning pins 3. As the back plate 4 and the floor plate 5 approach each other, the plurality of first pins 2 are inserted into the through-holes of the floor plate 5 corresponding to each of them and protrude from the floor plate 5, while the plurality of side plate positioning pins 3. Are inserted into the through holes of the floor plate 5 corresponding to each of these, and protrude from the floor plate 5. At this time, the plurality of side plate positioning pins 3 protrude from the outer peripheral portion of the floor plate 5. In the present embodiment, the floor board 5 has a rectangular outer shape when viewed in plan, and the four side board positioning pins 3 protrude from the four corners of the floor board 5.

Next, an auxiliary member 6 for positioning is attached to each first pin 2 protruding from the floor board 5. In the present embodiment, the auxiliary member 6 has a hollow shape, and the auxiliary member 6 is inserted into each first pin 2 protruding from the floor plate 5. As the material of the auxiliary member 6, for example, aluminum or ceramic can be used.

  Next, a plurality of ferrites (an example of a magnetic body) 7 are disposed on the surface (floor surface) of the floor plate 5 on which the plurality of auxiliary members 6 are erected. At this time, the plurality of ferrites 7 are disposed between the plurality of auxiliary members 6, and each is surrounded by the plurality of auxiliary members 6. Thus, the plurality of ferrites 7 are positioned in the first direction in which the magnetic flux path is to be formed and in the second direction orthogonal to the first direction.

Next, the side plate 8 made of, for example, resin is disposed on the outer peripheral portion of the floor plate 5. At this time, it is preferable to apply an adhesive resin to the outer peripheral portion of the floor plate 5 or the lower end surface of the side plate 8. A plurality of through holes corresponding to the plurality of side plate positioning pins 3 are formed in the side plate 8, and when the side plate 8 is disposed on the outer peripheral portion of the floor plate 5, the plurality of side plate positioning pins 3 are connected to these side plates 8. It inserts in the through-hole of the side plate 8 corresponding to each. Thereby, the side plate 8 is positioned on the outer peripheral portion of the floor plate 5. Moreover, since the side plate 8 is guided to a predetermined position by the side plate positioning pins 3 by using the side plate positioning pins 3, the arrangement of the side plates 8 is facilitated. In this embodiment, the side plate 8 divided into two parts is used. Of course, a side plate that is not divided may be used, or a side plate 8 divided into three or more parts may be used.

  Thereafter, although not shown, an adhesive resin is injected into a space surrounded by the floor plate 5 and the side plate 8. At this time, the movement of the plurality of auxiliary members 6 in the horizontal direction is restricted by the plurality of first pins 2 of the first jig 1, and the plurality of ferrites 7 are horizontally aligned by the plurality of auxiliary members 6. Movement in the direction is restricted. Therefore, the plurality of auxiliary members 6 and the plurality of ferrites 7 do not move in the horizontal direction due to the flow of the injected resin. Similarly, the side plate 8 does not move in the horizontal direction.

  Next, as shown in FIG. 1, the two coils 9, 10 are arranged side by side in the first direction so that the center portions of the two coils 9, 10 wound in advance in a spiral shape overlap the ferrite 7, respectively. To do. At this time, since the adhesive resin is filled in the space surrounded by the floor plate 5 and the side plate 8, the two coils 9, 10 are embedded in the resin.

Next, the space surrounded by the floor plate 5 and the side plate 8 is covered with a lid 11 made of, for example, resin. At this time, it is preferable that an adhesive resin is applied to the upper end surface of the side plate 8 or the outer peripheral portion of the lid 11. The lid 11 is formed with a plurality of through holes (an example of a second pin insertion opening). The plurality of through holes are opened at positions excluding the positions where the plurality of first pins 2 protrude from the floor plate 5 except for the positions overlapping the conductive wires respectively forming the two coils 9 and 10.

Next, the second jig 12 is brought close to the lid 11. The second jig 12 is provided with a plurality of second pins 13 at positions corresponding to the plurality of through holes of the lid 11, and the second jig 12 is provided with a plurality of second pins 13 having a lid. The lid 11 is approached so as to be inserted into the plurality of 11 through holes. As a result, the plurality of second pins 13 protrude into the space surrounded by the floor plate 5, the side plate 8 and the lid 11, and the second pins 13 are inserted into a part of the plurality of auxiliary members 6. Specifically, the second pin 13 is inserted into the auxiliary member 6 disposed at a position excluding the position overlapping the conductive wires forming the two coils 9 and 10 respectively.

  In the present embodiment, as shown in FIG. 1, a plurality of through holes are formed in the outer peripheral portion of the lid 11 in order to reliably arrange the side plate 8 on the outer peripheral portion of the lid 11. A plurality of side plate positioning pins 14 corresponding to the plurality of through holes of the part are erected on the second jig 12. The plurality of side plate positioning pins 14 of the second jig 12 are inserted into the plurality of through holes in the outer peripheral portion of the lid 11 when the second jig 12 approaches the lid 11, and the plurality of side plates 8 penetrate through the side plate 8. Inserted into the hole. Here, the side plate positioning pin 3 of the first jig 1 is inserted into the plurality of through holes of the side plate 8 from the side opposite to the side plate positioning pin 3 of the first jig 1 (the upper end surface side of the side plate 8), The side plate positioning pins 14 of the second jig 12 are inserted.

Thereafter, although not shown, the first jig 1 is separated from the back plate 4, while the second jig 12 is separated from the lid 11, whereby a plurality of first pins 2 and a plurality of pieces of the first jig 1 are separated. The side plate positioning pins 3 are extracted from the back plate 4 and the floor plate 5, and the plurality of second pins 13 and the plurality of side plate positioning pins 14 of the second jig 12 are extracted from the lid 11. This operation (step) is preferably performed after the adhesive resin filled in the space surrounded by the floor plate 5, the side plate 8, and the lid 11 is dried and cured. Moreover, when adhesive resin is applied between the floor plate 5 and the lower end surface of the side plate 8 or between the lid 11 and the upper end surface of the side plate 8, those adhesive resins are also dried. Therefore, it is preferable to separate the first jig 1 and the second jig 12 from each other.

  Finally, although not shown, a bolt is passed from the through hole of the lid 11 to the corresponding through hole of the back plate 4 and the tip of the bolt is screwed into the through hole of the back plate 4 or the tip of the bolt is attached. The back plate 4, the floor plate 5, the side plate 8, and the lid 11 are joined by being screwed onto a receiving member such as a nut outside the back plate 4. However, since it is sufficient to use as many bolts as can firmly connect the back plate 4, the floor plate 5, the side plate 8, and the lid 11, the lid can be used to firmly connect the back plate 4, the floor plate 5, the side plate 8, and the lid 11. In the case where it is not necessary to pass the bolts through all of the 11 through holes, the bolts may be passed only through the predetermined through holes of the lid 11.

  In addition, the through hole of the lid 11 and the second pin 13 of the second jig 12 correspond only to positions where it is necessary to pass bolts to firmly connect the back plate 4, the floor plate 5, the side plate 8 and the lid 11. It may be provided. In this embodiment, the bolt is passed from the lid 11 side toward the back plate 4, but the bolt may be passed from the back plate 4 side toward the lid 11. In this case, a holder such as a nut is attached to the through-hole of the lid 11, or a receiver such as a nut is screwed to the tip of the bolt outside the lid 11. Further, when the bolt is not used for fixing the side plate 8, the side plate positioning pin 14 of the second jig 12 may be inserted into the side plate 8 at a position different from the side plate positioning pin 3 of the first jig 1. In this case, the holes into which the side plate positioning pins 3 and 14 are inserted need not be through holes.

As described above, in the present embodiment, the plurality of auxiliary members 6 for positioning are positioned with respect to the first direction in which the magnetic flux path is to be formed and the second direction orthogonal to the first direction. After the plurality of ferrites 7 are arranged on the floor board 5, an adhesive resin is injected into the space surrounded by the floor board 5 and the side board 8 provided on the outer periphery of the floor board 5. The Next, after the two coils 9 and 10 are arranged in the first direction so that the central portions of the two coils 9 and 10 wound in a spiral shape overlap the ferrite 7, respectively, the floor plate 5 and A space surrounded by the side plates 8 is covered with a lid 11. According to this method for manufacturing a non-contact power supply pad, the ferrite 7 is regulated at a desired position on the floor plate 5 by the auxiliary member 6 during the manufacture of the non-contact power supply pad. 7 is less likely to occur, making it easier to produce a contactless power supply pad with the desired performance. Further, since the two coils 9 and 10 and the ferrite 7 are fixed by the adhesive resin, it is possible to provide a non-contact power feeding pad in which the positional deviation between the coils 9 and 10 and the ferrite 7 hardly occurs. Moreover, when resin is used for fixing the coils 9 and 10 and the ferrite 7, the ferrite 7 may move due to the flow of the resin when the resin is injected. With respect to this problem, according to the present embodiment, since the auxiliary member 6 regulates the position of the ferrite 7 when the resin is injected, the ferrite 7 does not move due to the flow of the resin. Further, since the two coils 9 and 10 are disposed after the resin is injected, the two coils 9 and 10 do not move. Furthermore, since the plurality of ferrites 7 may be arranged according to the plurality of auxiliary members 6 standing on the floor plate 5, the positioning of the plurality of ferrites 7 is facilitated. That is, the plurality of ferrites 7 are guided to a predetermined position by the plurality of auxiliary members 6 standing on the floor plate 5.

Further, in the present embodiment, before the ferrite 7 is disposed, the first jig 1 in which the plurality of first pins 2 are erected is disposed at a position corresponding to the plurality of first pins 2. through holes (one example of first pin insertion holes) close to the floor 5 which is formed, the first pin 2 of the plurality of are inserted into the through holes of the floor plate 5, the first pin from the floor 5 of the plurality of 2 protrudes, and the auxiliary member 6 is attached to the plurality of first pins 2 protruding from the floor plate 5. After the space surrounded by the floor plate 5 and the side plate 8 is covered with the lid 11, the first jig 1 is separated from the floor plate 5, and the plurality of first pins 2 are removed from the plurality of through holes of the floor plate 3. The Therefore, since the plurality of first pins 2 may be protruded from the floor board 5 using the first jig 1 and the auxiliary member 6 may be attached to the plurality of first pins 2, during the production of the non-contact power supply pad, The auxiliary member 6 can be easily disposed at a predetermined position.
Instead of attaching the auxiliary member 6 to the first pin 2, the auxiliary member 6 may be fixed to the floor board 5 with an adhesive resin or the like. However, by attaching the auxiliary member 6 to the first pin 2 as in the present embodiment, the auxiliary member 6 can be easily arranged at a predetermined position. Further, for example, instead of attaching the auxiliary member 6 to the first pin 2, the floor board 5 in which the auxiliary member 6 is integrally formed may be used. However, in this case, equipment or work for producing such a floorboard is required. On the other hand, the above-described method for manufacturing a non-contact power supply pad is more preferable because such equipment or work is unnecessary.

Moreover, in this Embodiment, after the space enclosed by the floor board 5 and the side board 8 is covered with the lid | cover 11, the lid | cover 11 in which the several through-hole (an example of the 2nd pin insertion port) was formed is used as the lid | cover. The second jig 12 in which a plurality of second pins 13 are erected approaches a position corresponding to the plurality of through holes 11, and the plurality of second pins 13 are inserted into the plurality of through holes of the lid 11. The plurality of second pins 13 protrude into the space surrounded by the floor plate 5, the side plate 8, and the lid 11, and are separated from the positions where the conductive wires forming the two coils 9, 10 are disposed, The second pin 13 is inserted into the auxiliary member 6. Thereafter, the second jig 12 is separated from the lid 11, and the plurality of second pins 13 are removed from the plurality of through holes of the lid 11. According to this, even when it is difficult to attach the auxiliary member 6 vertically only by the first pin 2, the auxiliary member 6 can be attached vertically by using the first pin 2 and the second pin 13 together. It becomes.
In addition, before the space surrounded by the floor plate 5 and the side plate 8 is covered with the lid 11, the plurality of through holes of the lid 11 are formed in the lid 11 in which a plurality of through holes (an example of the second pin insertion port) are formed. The second jig 12 in which a plurality of second pins 13 are erected is brought close to a position corresponding to the above, and the plurality of second pins 13 are inserted into the plurality of through holes of the lid 11, and the floor plate 5 and the side plate When the space surrounded by 8 is covered with the lid 11, the plurality of second pins 13 protrude into the space surrounded by the floor plate 5, the side plate 8, and the lid 11 to form two coils 9 and 10, respectively. The second pin 13 may be inserted into the auxiliary member 6 at a plurality of locations deviating from the position where the is disposed.

Further, after arranging the plurality of ferrites 7 on the floor plate 5, the side plate 8 is arranged on the outer periphery of the floor plate 5, but before arranging the plurality of ferrites 7, the side plate 8 is arranged on the outer periphery of the floor plate 5. Alternatively, the floor plate 5 in which the side plate 8 is integrally formed may be used. However, if the side plate 8 is provided on the outer peripheral portion of the floor plate 5 before the plurality of ferrites 7 are arranged, the work space for arranging the plurality of ferrites 7 on the floor plate 5 is reduced. It is preferable to arrange the side plate 8 on the outer peripheral portion of the floor plate 5 after the plate is arranged on the floor plate 5. Moreover, when using the floor board 5 in which the side board 8 was integrally formed, the installation or operation | work for manufacturing such a floor board 5 is needed. On the other hand, the above-described method for manufacturing a non-contact power supply pad is more preferable because such equipment or work is unnecessary.

  The lid 11, the side plate 8, the floor plate 5, and the back plate 4 are fixed with bolts, but the lid 11, the side plate 8, The floor plate 5 may be fixed, bolts may be inserted from the back plate 4 side, and only the back plate 4 and the floor plate 5 may be fixed by bolts. Alternatively, the back plate 4 and the floor plate 5 may be structurally fixed by caulking or the like, or an adhesive resin may be used for fixing the back plate 4 and the floor plate 5. Further, when only the adhesive resin is used to fix the side plate 8 and the floor plate 5 and the side plate 8 and the lid 11, the side plate positioning pins 3 and 14 may not be used. However, the side plate 8 can be easily positioned on the outer peripheral portion of the floor plate 5 by using the side plate positioning pins 3. Further, by using the side plate positioning pins 14, the side plate 8 can be reliably disposed on the outer peripheral portion of the lid 11.

  Further, in the above-described method for manufacturing a non-contact power supply pad, the lid 11, the floor plate 5, and the back plate 4 are coupled by passing the bolt through the predetermined auxiliary member 6, so that the auxiliary member 6 that penetrates the bolt is erected vertically. Need to be. On the other hand, in the above-described method for manufacturing a non-contact power supply pad, the pins 2 and 13 are inserted from both directions of the auxiliary member 6, so that the posture of the auxiliary member 6 through which the bolt passes can be maintained vertically. . In addition, when the 1st jig | tool 1 can be provided with the 1st pin 2 of the height which can maintain the attitude | position of the auxiliary member 6 perpendicular | vertical, the 2nd pin 13 does not need to be used.

Next, an example of a non-contact power supply pad manufactured by the above-described method for manufacturing a non-contact power supply pad will be described. FIG. 2 is a perspective view for explaining the internal structure of the contactless power feeding pad in the present embodiment. However, for the sake of explanation, the coils 9, 10 and the adhesive resin and the lid 11 are not shown. As shown in FIG. 2, the plurality of ferrites 7 are disposed between the plurality of auxiliary members 6, and each is surrounded by the plurality of auxiliary members 6. In the present embodiment, a plurality of ferrites 7 are in contact with each other in the first direction in which the magnetic flux path is formed. Furthermore, according to the auxiliary member 6 provided at intervals in the second direction orthogonal to the first direction, a plurality of ferrites 7 are arranged at intervals in the second direction. Therefore, the auxiliary member 6 is disposed between the ferrites 7 adjacent in the second direction. Further, auxiliary members 6a, 6b, 6c higher than the upper surface of the ferrite 7 and auxiliary members 6d having the same height as the upper surface of the ferrite 7 or a lower height than the upper surface of the ferrite 7 are used for the auxiliary member 6. The In the present embodiment, the auxiliary members 6 a, 6 b, and 6 c are the same height as the upper end surface of the side plate 8, and the auxiliary member 6 d is the same height as the upper surface of the ferrite 7. Further, the auxiliary member 6d is disposed at a position overlapping the conductive wires that form the coils 9 and 10 described above.
In the case of using existing ferrite when manufacturing a contactless power supply pad, when a desired power supply range or power supply distance cannot be obtained by using only one ferrite, a plurality of ferrites 7 as shown in FIG. Need to use. According to the present embodiment, even when a plurality of ferrites 7 are required to form a desired magnetic flux path, a plurality of ferrites 7 are desired on the floor plate 5 during manufacturing of the contactless power supply pad. Since the position is restricted, the plurality of ferrites 7 are unlikely to fall apart. Therefore, since the positional deviation between the coils 9 and 10 and the ferrite 7 does not easily occur during the manufacture of the contactless power supply pad, it is easy to manufacture the contactless power supply pad having the desired performance. In addition, since the plurality of ferrites 7 are in contact with each other in the first direction along which the magnetic flux path passes, small-scale leakage magnetic flux can be prevented.

  FIG. 3 is a plan view showing the internal structure of the contactless power supply pad according to the present embodiment, and more specifically shows the contactless power supply pad with the lid 11 removed. 4 is a cross-sectional view taken along the line AA in FIG. As shown in FIG. 3, a plurality of rows of ferrite composed of a plurality of ferrites 7 connected in the first direction are arranged in a second direction orthogonal to the first direction, as shown in FIG. The magnetic pole regions 15 and 16 are respectively set at both ends of each row of the ferrite 7, and the coils 9 and 10 are respectively disposed around the magnetic pole regions 15 and 16 as shown in FIG. It is wound in a spiral shape (spiral shape) from the outside of the end of each row over the upper surface of each row of ferrite 7. In the present embodiment, as shown in FIG. 4, each of the coils 9 and 10 is wound in a single plane on the upper surface of each row of ferrite 7 and outside the end of each row of ferrite 7, It is rolled up and down in two steps. The number of windings is eight.

  As shown in FIGS. 3 and 4, auxiliary members 6 a and 6 b having the same height as the upper end surface of the side plate 8 protrude from the space formed in the central part of each coil 9 and 10. Further, an auxiliary member 6c having the same height as the upper end surface of the side plate 8 is disposed at the center of the floor plate 5 in the first direction. As described above, the auxiliary members 6 a to 6 c that are higher than the upper surface of the ferrite 7 are arranged in a region excluding a region where the conductive wires forming the two coils 9 and 10 are arranged. Although not shown, a part of each of the coils 9 and 10 passes over the auxiliary member 6d having the same height as the upper surface of the ferrite 7 described above.

Further, as shown in FIG. 3 and FIG. 4, the above-mentioned adhesive resin 17 is filled in the casing made up of the floor plate 5, the side plate 8 and the lid 11, and each auxiliary member 6, each ferrite 7 and each The coils 9 and 10 are fixed in the housing of the non-contact power supply pad. Both ends of each of the coils 9 and 10 are drawn out of the housing of the non-contact power supply pad, and the terminal 18 is attached.

  Note that the dimension S of the gap between the coil 9 and the coil 10 is the distance from the front surface of the contactless power supply pad that can provide a significant horizontal magnetic flux component under a constant number of turns of the coil 9 and the coil 10 (power supply range or This is one of the factors that determine the power supply distance), and the power supply range (or power supply distance) increases as the dimension S increases. Therefore, when two non-contact power supply pads are arranged at positions away from each other and power is supplied, it is preferable to widen the gap between the coil 9 and the coil 10.

As described above, the contactless power supply pad of the present embodiment is
A housing including the floor plate 5, a side plate 8 provided on the outer periphery of the floor plate 5, and a lid 11 covering a space surrounded by the floor plate 5 and the side plate 8;
A plurality of ferrites 7 arranged on the floor plate 5;
A plurality of auxiliary members 6 surrounding each ferrite 7;
Two coils 9, 10 that are respectively wound in a vortex, are arranged side by side in a first direction in which each central portion overlaps the ferrite 7 and a magnetic flux path is formed;
An adhesive resin 17 filled in a space surrounded by the floor plate 5 and the side plate 8;
Is provided. According to this configuration, a substantially planar pad having a low outer shape can be provided as a contactless power supply pad that generates or receives magnetic flux. Further, it is possible to provide a pad with little occurrence of positional deviation between the coils 9 and 10 and the ferrite 7.

Further, according to the present embodiment, the two coils 9, 10 are arranged such that a part of each coil 9, 10 overlaps the auxiliary member 6 at the same height as the upper surface of the ferrite 7. Since they are arranged, the arrangement of the two coils 9 and 10 is not restricted by the auxiliary member 6.
In the present embodiment, the auxiliary member 6 protrudes from the space formed in the central portion of each coil 9, 10 at a location where the height of the auxiliary member 6 is higher than the upper surface of the ferrite 7. Two coils 9, 10 are arranged. Therefore, since the auxiliary member 6 (6a, 6b) becomes a mark of the position where the coils 9 and 10 are arranged during the manufacture of the contactless power supply pad, the auxiliary member 6 (6a, 6b) is located between the two coils 9 and 10 and the ferrite 7. Misalignment is less likely to occur. For this reason, manufacture of the pad for non-contact electric power feeding with the expected performance becomes easier. When the auxiliary members 6a and 6b that are higher than the upper surface of the ferrite 7 are protruded from the space formed in the central part of each coil 9 and 10, an adhesive resin 17 is injected after the two coils 9 and 10 are arranged. May be. Even in this case, since the positions of the two coils 9 and 10 are restricted by the auxiliary members 6a and 6b, the movement of the coils 9 and 10 due to the flow of the adhesive resin 17 is prevented, and the two coils 9 and 9 are prevented. The positional deviation between 10 and the ferrite 7 hardly occurs.

  In the present embodiment, the two coils 9, 10 each have a portion wound up and down in two steps and a portion wound in one step, and the entire region where a plurality of ferrites 7 are arranged. Of each of the coils 9 and 10 are arranged on the outer sides of both ends in the first direction, and in the region where the plurality of ferrites 7 are disposed, 7, the portions of the coils 9, 10 wound in one stage are arranged. Therefore, the planar dimensions of the pad can be shortened as compared with a pad in which coils are wound in a horizontal row as disclosed in Patent Document 2 described above. Further, since the coils 9 and 10 approach the ferrite 7 outside both ends of the magnetic flux path passing through the ferrite 7, the magnetomotive force of the ferrite 7 becomes strong and the performance is improved. In order to increase the magnetomotive force of the ferrite 7, preferably, the diameter of the auxiliary member 6 protruding from the space formed in the central portion of each coil 9, 10 is made as small as possible so that each coil 9 10 is as close as possible to the ferrite 7. In the present embodiment, as shown in FIG. 2 and FIG. 3, the diameter of the auxiliary member 6 a provided outside the both ends in the first direction in the entire region where the plurality of ferrites 7 are arranged, It is made thinner than the diameters of the other auxiliary members 6b to 6d.

  In the present embodiment, auxiliary members 6 a to 6 c that are higher than the upper surface of the ferrite 7 are disposed in a region excluding a region where the conductive wires forming the two coils 9 and 10 are disposed. According to this, when a load is applied to the lid 11, the auxiliary members 6 a to 6 c support the lid 11, so that problems such as cracking are less likely to occur in the non-contact power supply pad. In particular, in the present embodiment, since the auxiliary member 6c disposed at the center portion of the floor plate 5 in the first direction is higher than the upper surface of the ferrite 7, non-contact occurs when a load is applied to the lid 11. Problems such as cracking of the power supply pad can be prevented more reliably. Furthermore, in the present embodiment, auxiliary members 6b and 6c higher than the upper surface of the ferrite 7 are disposed between the adjacent ferrites 7 in the second direction orthogonal to the first direction. As compared with the case where no gap is provided between the individual ferrites 7, it is possible to more reliably prevent defects such as cracks. When there is no fear that an excessive load is applied to the lid 11 of the contactless power feeding pad, all the auxiliary members 6 are the same height as the upper surface of the ferrite 7 or lower than the upper surface of the ferrite 7. Also good. However, the auxiliary member 6 disposed in the space formed in the central portion of each coil 9, 10 is made higher than the upper surface of the ferrite 7, thereby marking the position where the two coils 9, 10 are disposed. Therefore, it is preferable to make it higher than the upper surface of the ferrite 7.

  The arrangement and number of the auxiliary members 6 are not particularly limited, and the plurality of auxiliary members 6 may be arranged so that the positions of the plurality of ferrites 7 can be restricted to predetermined positions. Further, the arrangement of the auxiliary member 6 that is higher than the upper surface of the ferrite 7 is not particularly limited, and may be arranged in a region excluding a region where the conducting wires forming the two coils 9 and 10 are arranged. However, the greater the number of auxiliary members 6 that are higher than the upper surface of the ferrite 7, the more reliable the prevention of defects such as cracking of the contactless power supply pad that occurs when a load is applied to the lid 11. . Further, the height of the auxiliary member 6 higher than the upper surface of the ferrite 7 is not limited to the same height as the upper end surface of the side plate 8, and is higher than the upper surface of the ferrite 7 and less than or equal to the upper end surface of the side plate 8. Any height is acceptable. However, as the auxiliary member 6 higher than the upper surface of the ferrite 7 is higher, it is possible to more reliably prevent problems such as cracking of the contactless power feeding pad that occur when a load is applied to the lid 11.

Moreover, although the thin plate-like back plate 4 made of a metal material such as aluminum is provided on the bottom surface of the floor plate 5, the back plate 4 may be omitted. However, by providing the back plate 4 on the non-contact power supply pad, a small leakage magnetic flux can be prevented when the ferrite 7 is defective or defective.
Moreover, although the floor board 5 was mounted on the back plate 4, you may abbreviate | omit the floor board 5 using the back plate 4 as a floor board.
Further, when the auxiliary member 6 is provided only at a position outside the region where the conductive wire forming the coil 9 or the coil 10 is disposed, the height of all the auxiliary members 6 may be higher than the upper surface of the ferrite 7. Absent.
Moreover, the external shape of the auxiliary member 6 when viewed in plan is not limited to a circle, and may be a square such as a square or a rectangle.
In the present embodiment, the number of windings of each of the coils 9 and 10 is eight, but the number is not limited to eight. In addition, although the coils 9 and 10 are arranged in two stages outside the ends of the rows of the ferrite 7, it is also possible to have more stages, three stages, and four stages. However, two steps are preferable for reducing the thickness of the contactless power supply pad.
In this embodiment, the coils 9 and 10 are arranged in two stages outside the end of each row of the ferrite 7, but as disclosed in Patent Document 2, a plurality of coils wound in a horizontal row are provided. It is also possible to arrange so as to fit within the entire region where the ferrite 7 is arranged.
In this embodiment, the coils 9 and 10 are formed by two conductive wires. However, when the coils 9 and 10 are connected in series, the coils 9 and 10 may be formed by a single conductive wire. .

The non-contact power supply pad described above is portable and can be arranged two-dimensionally rather than normally three-dimensionally. For example, it can be used for non-contact charging of a forklift. In this case, as shown in FIG. 5, one pad is connected to the high-frequency power supply device 21 as a primary side pad, and the other pad is attached to the forklift as a secondary side pad as shown in FIG. And connected to a charger 23 that charges a battery 22 mounted on the forklift.
Specifically, the two coils 9 and 10 of the non-contact power supply pad used as the primary side pad are connected to a commercial power source 24 (for example, AC 200V) as shown in FIG. A high frequency voltage is applied. Thereby, as shown in FIG. 7, the magnetic flux exits from the one magnetic pole region 15, 16 through the inside of the ferrite 7 from the other magnetic pole region 16, 15 and passes through the air to the one magnetic pole region 15, 16 magnetic flux paths 25 are formed, that is, an arched magnetic flux path 25 is formed above the contactless power supply pad, and a significant horizontal magnetic flux component is provided at a significant distance above the front surface of the pad. . Note that a magnetic flux path is essentially not formed on the back side of the pad.
Therefore, when the non-contact power supply pad used as the secondary pad is arranged in the arch-shaped magnetic flux path 25, the vertical direction with respect to the non-contact power supply pad used as the primary pad Even if they are shifted to each other or laterally, an induced voltage (high frequency voltage) is induced in the two coils 9 and 10 of the non-contact power supply pad on the secondary side, and the battery 22 is charged by the charger 23. The For example, as shown in FIG. 6, a resonant capacitor 26 that resonates at the frequency of a high-frequency voltage together with the coils 9 and 10 is connected to both ends of two coils 9 and 10 connected in parallel. A circuit for charging the battery 22 may be configured by connecting the charger 23 to the battery. The charger 23 includes at least a rectifier, and converts the induced voltage (high frequency voltage) into a direct voltage (for example, DC 300 V) to charge the battery 22.

5 shows a circuit configuration in which the two coils 9 and 10 are directly connected to the high frequency power supply device 21, but the coil 9 is interposed between the two coils 9 and 10 and the high frequency power supply device 21. 10 and a resonant capacitor that resonates at a frequency of a high frequency voltage. In this case, a resonance capacitor may be connected in parallel to the coils 9 and 10 to form a parallel resonance circuit, or a series resonance circuit may be connected in series.
FIG. 6 shows a circuit configuration in which one resonance capacitor 26 is connected in parallel to both ends of each of the two coils 9, 10. A series resonance circuit may be configured by connecting in series.
FIG. 5 shows a circuit configuration in which two coils 9 and 10 are connected in series, and FIG. 6 shows a circuit configuration in which two coils 9 and 10 are connected in parallel. The two coils 9 and 10 may be connected in parallel in the non-contact power supply pad used as the pad of the second contact, or the two coils 9 and 10 in the non-contact power supply pad used as the secondary pad 10 may be connected in series.

  Next, a modified example of the contactless power feeding pad in the present embodiment will be described. The number and arrangement of the ferrites 7 arranged inside the non-contact power supply pad are not particularly limited, and are determined so as to obtain a desired power supply range or power supply distance.

  For example, as shown in FIG. 2, instead of arranging a plurality of ferrites 7 in the first direction in which the magnetic flux path is formed, a single elongated plate-like ferrite 7 is arranged as shown in FIG. Also good. In this case, the number of auxiliary members 6 that regulate the position of the ferrite 7 can be reduced. Therefore, as shown in FIG. 8, only the auxiliary members 6a to 6c higher than the upper surface of the ferrite 7 may be used.

  For example, as shown in FIG. 9, a single large-area ferrite 7 may be used. In this case, since the plurality of auxiliary members 6 only need to be arranged along the outer periphery of the ferrite 7, the number of auxiliary members 6 can be reduced. Therefore, as shown in FIG. 9, only the auxiliary members 6a to 6c higher than the upper surface of the ferrite 7 may be used.

  For example, as shown in FIGS. 10 and 11, a plurality of ferrites 7 may be arranged in contact with each other in the second direction orthogonal to the first direction in which the magnetic flux path is formed. Even when the contactless power feeding pad having such a configuration is manufactured, the plurality of ferrites 7 are regulated at a desired position on the floor plate 5 during the manufacture of the contactless power feeding pad. 7 is unlikely to fall apart. Accordingly, since the positional deviation between the two coils 9 and 10 and the ferrite 7 is less likely to occur during the manufacture of the contactless power supply pad, it is easy to manufacture the contactless power supply pad having the desired performance. In addition, since the plurality of auxiliary members 6 need only be arranged along the outer periphery of the entire region where the ferrite 7 is arranged, the number of auxiliary members 6 can be reduced. Therefore, only the auxiliary members 6a to 6c higher than the upper surface of the ferrite 7 may be used. Furthermore, in this case, the non-contact power supply pad can be made compact (reduction in area).

  Further, as shown in FIG. 12, each of the magnetic pole regions 15 and 16 may be provided with a plate-like second ferrite (an example of a second magnetic body) 19 in contact with the upper surface of the ferrite 7. In this case, the second ferrite 19 is preferably arranged in alignment with the end of the lower ferrite 7. As described above, the second ferrite 19 in contact with the upper surface of the lower ferrite 7 is disposed at both end portions in the first direction in the entire region where the lower ferrite 7 is disposed. The second ferrite 19 is provided at 15 and 16, respectively, and the magnetomotive force of the ferrites 7 and 19 is increased, and the performance is improved. The second ferrite 19 is preferably arranged after the adhesive resin 17 is filled. For example, as shown in FIG. 13, the adhesive resin 17 is filled in the housing of the contactless power supply pad except for the front surface (upper surface) of the second ferrite 19, and the ferrites 7 and 19 and the coil 9 are filled. 10 may be fixed.

Further, when a through hole is formed in the ferrite 7, the auxiliary member 6 may be inserted into the through hole of the ferrite 7 as shown in FIG. 14, for example. In this way, the area where the auxiliary member 6 is arranged can be reduced, and the non-contact power supply pad can be made compact (area reduction). For example, as shown in FIG. 14, if the auxiliary member 6b is inserted into the through holes formed in the ferrite 7 at both ends in the first direction, the auxiliary member 6a shown in FIG. The coils 9 and 10 can be brought closer to the ferrite 7 outside both ends in the first direction in the entire region to be arranged.
Similarly, for example, as shown in FIG. 15, an auxiliary member 6 b protruding from the upper surface of the lower ferrite 7 may be inserted into a hole formed in the upper second ferrite 19. In this case, since the position of the second ferrite 19 can be regulated by the auxiliary member 6b protruding from the upper surface of the lower ferrite 7, the second ferrite 19 is filled before the resin of the adhesive resin 17 is filled. May be arranged.

  Next, a non-contact charging system for forklifts using the above-described non-contact power supply pad will be described. The non-contact charging system described below is for charging a battery (for example, a lead storage battery) mounted on an existing counterbalance type electric forklift (battery vehicle) or the like.

FIG. 16 is a perspective view for explaining the overall configuration of the contactless charging system according to the present embodiment, and FIG. 17 is a side view for explaining the overall configuration of the contactless charging system according to the present embodiment.
The contactless charging system shown in FIGS. 16 and 17 includes a primary-side contactless power supply pad 30a connected to a high-frequency power supply (not shown) (an example of an AC power supply), a battery (for example, a lead storage battery) 31, and the like. A secondary non-contact power supply pad 30b disposed on the forklift 33 on which the charger 32 for charging the battery 31 is mounted, and a secondary non-contact power supply pad 30b disposed on the forklift 33. A rectifier 34 that converts a high-frequency voltage sent from the dc into a DC voltage and sends it to the charger 32. The primary non-contact power supply pad 30a and the secondary non-contact power supply pad 30b The non-contact power supply pad described above, which is mounted on the forklift 33 by supplying power from the non-contact power supply pad 30a on the primary side to the non-contact power supply pad 30b on the secondary side in a non-contact manner. To charge the battery 31 that is.
Further, this non-contact charging system is installed on the ground and can be loaded with wheels (front wheel 35a and rear wheel 35b) mounted on one side of the forklift 33. The primary side non-contact power supply pad 30a is provided on the support base 36, and the primary side non-contact power supply pad 30a from the support base 36 (below one side portion of the forklift 33) is provided. A secondary non-contact power supply pad 30 b is provided on the lower surface or lower portion of one side of the forklift 33 so that the supplied power can be received.
It should be noted that the primary side can be prevented so that the primary side non-contact power supply pad 30a can be prevented from cracking when a load is applied from the forklift 33 to the lid of the primary side non-contact power supply pad 30a. The auxiliary member disposed in the housing of the non-contact power supply pad 30a includes an auxiliary member that is higher than the upper surface of the ferrite. On the other hand, the secondary non-contact power supply pad 30b disposed on the forklift 33 may or may not include an auxiliary member higher than the upper surface of the ferrite.

  For example, as shown in FIG. 5, a high frequency voltage is applied to the two coils 9 and 10 of the primary non-contact power supply pad 30 a from a high frequency power supply device 21 connected to the commercial power supply 24. On the other hand, the non-contact power supply pad 30b on the secondary side is connected to the rectifier 34 as shown in FIG. The existing forklift 33 is equipped with a connector into which a plug provided at the tip of a cable connected to a commercial power source is manually inserted, and the connector is connected to the charger 32. The charger 32 includes at least a rectifier, and converts an AC voltage (for example, AC 200 V) supplied from a commercial power source to the connector via a cable into a DC voltage (for example, DC 300 V) to charge the battery 31. Therefore, in the present embodiment, the secondary non-contact power supply pad 30b is connected to the connector (not shown) provided in the forklift 33 via the rectifier 34. According to this configuration, when the secondary non-contact power supply pad 30b is disposed in the magnetic flux path formed in an arch shape above the primary non-contact power supply pad 30a, An induced voltage (high frequency voltage) is induced in the two coils 9 and 10 of the non-contact power supply pad 30b, and the induced voltage becomes a DC voltage (for example, DC 300V) by the rectifier 34, and the DC voltage is mounted on the forklift 33. To a connector (not shown). The battery 31 of the forklift 33 is charged by the charger 32 mounted on the forklift 33. The circuit including the secondary-side non-contact power supply pad 30b may have a configuration in which a rectifier 34 is added to the circuit configuration illustrated in FIG. In other words, a rectifier 34 may be connected between the resonant capacitor 26 and the charger 23 (corresponding to the charger 32 of FIG. 17).

  As shown in FIGS. 16 and 17, the support base 36 has a flat upper surface 36 a and is configured to be long in the traveling direction of the forklift 33. The length of the upper surface 36a of the support base 36 is such that the front wheel 35a and the rear wheel 35b on one side of the forklift 33 can ride on the upper surface 36a simultaneously when the forklift 33 is stopped at a predetermined charging position. Make length. The wheelbase of existing electric forklifts is not constant. Therefore, the length of the upper surface 36a of the support base 36 is made to correspond to the wheel base of the forklift to be charged. The non-contact power supply pad described above induces an induced voltage (high-frequency voltage) in the two coils 9 and 10 of the secondary pad even if the primary pad and the secondary pad are laterally displaced. Therefore, the wheel base of the existing electric forklift can be divided into a plurality of groups according to the allowable lateral displacement amount, and the length of the upper surface 36a of the support base 36 can be determined for each group. it can. Alternatively, the support base 36 is configured to connect a plurality of parts, and the upper surface 36a of the support base 36 is changed by changing the number of parts to be mounted on the ground in accordance with the wheel base of the forklift 33 to be charged. You may change the length. Also in this case, the number of parts constituting the support base 36 can be reduced by dividing the wheel base of the existing electric forklift into a plurality of groups in accordance with the above-described allowable lateral displacement. Or you may make the length of the upper surface 36a of the support stand 36 respond | correspond to the largest wheel base among the wheel bases of the existing electric forklift.

  The position where the primary non-contact power supply pad 30a is provided on the support base 36 may be determined by the distance from the front wheel 35a of the forklift 33, for example. In this way, when the front wheel 35a of the forklift 33 stops at a predetermined position, an induced voltage is induced by the alternating magnetic field generated from the primary non-contact power supply pad 30a provided on the support base 36. The non-contact power supply pad 30b on the secondary side provided on the forklift 33 can be disposed at the position. As described above, the front wheels 35a of the forklift 33 are positioned even if the primary side pad and the secondary side pad are laterally displaced, the induced voltage (high frequency voltage) applied to the secondary side coils 9 and 10. For example, as shown in FIG. 16, the driver may stop the forklift 33 with the stop line 37 as a mark.

The height H of the support base 36 depends on the thickness (height) of the primary-side non-contact power supply pad 30a. When only the front wheel 35a and the rear wheel 35b on one side of the forklift 33 ride on the support base 36, and the front and rear wheels mounted on the other side are supported on the ground, the forklift on the support base 36 Since 33 is inclined, the higher the height of the support base 36, the more unstable the state becomes. However, as described above, the contactless power supply pad of the present embodiment can be made thinner. Therefore, according to this embodiment, the instability of the forklift 33 in which one wheel rides on the support base 36 and is inclined can be reduced.
The width W of the support base 36 is equal to or greater than the width of the wheel 35 of the forklift 33, for example, 300 mm. However, as described above, the forklift 33 on the support base 36 is tilted, and therefore, it is necessary to make the width of the tilted forklift 33 below a width that does not contact the support base 36. Further, when the position of at least one of the inner surface and the outer surface of the front wheel 35a and the rear wheel 35b is shifted in the width direction of the vehicle body, the vehicle body between the outer surface on the outer side and the inner surface on the inner side. The width W of the support base 36 is set to be greater than the interval in the width direction.
As shown in the figure, slopes 36b may be provided at both ends of the forklift 33 in the traveling direction so that the forklift 33 can get on and off the support base 36 smoothly.

  As shown in FIG. 18A, for example, the primary-side non-contact power supply pad 30a is coupled to the top plate 39 by an elastic body 38 and is deeper than the thickness of the primary-side non-contact power supply pad 30a. It may be arranged in the recess 40 formed in the support base 36 so as to be. Specifically, the side plate of the primary-side non-contact power supply pad 30a is joined to the top plate 39 covering the concave portion 40 provided in the support base 36 via the elastic body 38, and the top plate is placed in the concave portion 40. The contactless power supply pad 30a on the primary side from 39 is suspended. According to this configuration, as shown in FIG. 18B, even if the top plate 39 is deformed when the forklift 33 is placed on the support base 36, the primary suspended from the top plate 39 by the elastic body 38. The casing of the non-contact power supply pad 30a on the side is not easily deformed. Therefore, even if a load is applied to the lid of the primary non-contact power supply pad 30a when the forklift 33 rides on the support base 36, problems such as cracking of the primary non-contact power supply pad 30a are unlikely to occur. . The material of the top plate 39 is selected to have a small influence on the magnetic field (magnetic flux) generated from the primary non-contact power supply pad 30a.

  Application of the high-frequency voltage to the primary-side non-contact power supply pad 30a is performed, for example, when the front wheel 35a and the rear wheel 35b on one side of the forklift 33 ride on the support base 36, and the front wheel 35a stops at a predetermined position. After that, the driver or the operator may start by operating a switch for instructing application of the high frequency voltage. For example, as shown in FIG. 41, an opening 39a may be provided in the top plate 39, and the process may be started based on a signal generated from the reflection type photo interrupter 41.

As described above, in the non-contact charging system according to the present embodiment, the primary non-contact power supply pad 30a is mounted on the support base 36 on which the front wheel 35a and the rear wheel 35b mounted on one side of the forklift 33 ride. A non-contact power supply pad 30b on the secondary side is disposed on the lower surface or the lower portion of one side portion of the forklift 33.
On the other hand, a general electric vehicle in which electric power is transmitted in a non-contact manner from a primary pad fixed on the floor of a garage or the ground of a parking lot to a secondary pad provided on the lower surface of the vehicle body In the non-contact charging system, the secondary pad is disposed on the center line of the vehicle body (the center in the width direction of the vehicle body). However, when the object to which electric power is transmitted in a non-contact manner is a forklift, if the secondary pad provided on the lower surface of the body of the forklift is disposed on the center line of the vehicle, the primary pad fixed to the ground The fork may come into contact with the primary pad and the primary pad may be damaged. In order to avoid this problem, it is necessary to embed the primary side pad in the ground, and it takes time and cost to lay the primary side pad. Further, when the target for attaching the secondary side pad is an existing forklift, the forklift body is heavier and stronger than a general electric vehicle, so the secondary side pad provided on the lower surface of the body, Installation on the center line of the vehicle body becomes difficult.

With respect to these problems, according to the present embodiment, it is not necessary to embed the primary-side non-contact power supply pad 30a in the ground, so that the primary-side non-contact power supply pad 30a can be easily laid. , It can reduce the time and cost for the installation. Further, even if the target for attaching the non-contact power supply pad 30b on the secondary side is the existing forklift 33, the non-contact power supply pad 30b on the secondary side is disposed on the lower surface or the lower part of one side of the forklift 33. Therefore, as compared with the case where the secondary non-contact power supply pad 30b provided on the lower surface or the lower portion of the vehicle body is disposed on the center line of the vehicle body, the attachment of the non-contact power supply pad 30b on the secondary side and Maintenance becomes easy. Further, the support base 36 can also function as a guide portion that guides the forklift 33 to a predetermined charging position, and is different from the primary side pad as in a non-contact charging system of a general electric vehicle. It is not necessary to provide a guide portion at the place, and labor and cost for laying the primary side of the non-contact charging system can be reduced.
Further, according to the present embodiment, the forklift 33 is inclined with one wheel riding on the support base 36, so that the center of gravity of the forklift 33 moves. Therefore, the pressure received by the support base 36 from the forklift 33 can be reduced.

In the present embodiment, the case where the driver stops the forklift 33 with the stop line 37 as a mark has been described. However, for example, as shown in FIG. The positioning of the front wheel 35a may be realized. Further, in this case, as shown in FIG. 20, a contact sensor 43 is provided on the wheel stop 42, and a signal generated from the contact sensor 43 when the front wheel 35 a of the forklift 33 abuts on the wheel stop 42 is used for the primary side. Application of a high-frequency voltage to the non-contact power supply pad 30a may be started.
In the present embodiment, the case where only the support base 36 on which the wheels (the front wheels 35a and the rear wheels 35b) mounted on one side of the forklift 33 can be mounted is described on the ground. As described above, in this case, the forklift 33 is inclined and becomes unstable. Therefore, as shown in FIG. 21, a support base 44 on which a wheel mounted on the other side of the forklift 33 can be mounted may be further installed on the ground so that the forklift 33 does not tilt. The support base 44 need not be provided with a primary-side non-contact power supply pad.

  Subsequently, a modified example of the support base 36 will be described. 22A to 22C show a modification of the support base 36. FIG. As shown in FIGS. 22 (a) to 22 (c), the width W of the support base 36 is not limited to a fixed value. For example, the width of the end portion on which the forklift 33 rides may be widened. This makes it easy to place the rear wheel 35b of the forklift 33 on the support table 36 even when the forklift 33 rides on the support table 36 while turning. Further, as shown in FIG. 22 (a), if the slope 36c is also provided on the side surface of the widened end, the rear wheel 35b of the forklift 33 can be more easily placed on the support base 36. become.

  Next, another example of the non-contact charging system for forklifts using the non-contact power supply pad will be described. In the above non-contact charging system, power is supplied to the forklift 33 from the lower side of the vehicle body without contact. However, as shown in FIG. 23, a secondary non-contact power supply pad 30b is arranged on one side or side surface of the vehicle body. It is possible to supply power to the forklift 33 from one side of the vehicle body in a non-contact manner. As shown in FIG. 24, a secondary non-contact power supply pad is provided behind the seat 33a of the forklift 33. 30b may be provided so that power is supplied to the forklift 33 from the rear side of the vehicle body without contact. Alternatively, as shown in FIG. 25, the secondary side non-contact power supply pad 30b is provided to the head guard 33b of the forklift 33. So that the forklift 33 can be fed in a non-contact manner from above the vehicle body, or as shown in FIGS. 26 and 27, the back of the back cover 33c of the forklift 33 can be provided. By disposing the non-contact power supply pad 30b of the secondary side to the space, it may be to power the forklift 33 without contact from the rear of the vehicle body. Alternatively, as shown in FIG. 28, a housing 52 that holds the secondary-side non-contact power supply pad 30 b in advance may be used, and the housing 52 may be disposed on the forklift 33. In other examples of these non-contact charging systems, there is no possibility that a load is applied from the forklift 33 to the lid of the primary-side non-contact power supply pad 30a, so that the same as the non-contact power-supply pad 30b on the secondary side. In addition, the auxiliary member of the non-contact power supply pad 30a on the primary side may or may not include an auxiliary member higher than the upper surface of the ferrite.

  When power is supplied to the forklift 33 from one side of the vehicle body in a non-contact manner, the primary non-contact power supply pad 30 a is disposed so as to face the side surface of the forklift 33. For example, as shown in FIG. 23, the support member 46 that is fixed to the pillar 45 and protrudes in the horizontal direction is placed on the primary side at the same height as the secondary non-contact power supply pad 30b disposed on the forklift 33. The contactless power supply pad 30a may be supported. When the driver stops the forklift 33 with the stop line 37 as a mark, an induced voltage is generated by an alternating magnetic field generated from the primary non-contact power supply pad 30a supported by the support member 46. The secondary non-contact power supply pad 30b provided on the forklift 33 is pulled to the ground so as to be placed at the induced position.

  A support that can be expanded and contracted in the protruding direction by an actuator so that the secondary non-contact power supply pad 30b is securely disposed within the range of a significant magnetic field generated from the primary non-contact power supply pad 30a. Using the arm as the support member 46, the primary-side non-contact power supply pad 30a approaches or moves away from the secondary-side non-contact power-supply pad 30b, and the primary-side non-contact power-supply pad 30a. You may enable it to adjust the space | interval between 30a and the pad 30b for non-contact electric power feeding of a secondary side. Further, instead of the stop line 37, a wheel stopper for positioning the front wheel of the forklift 33 may be laid on the ground. Alternatively, as a member for guiding the forklift 33 so that the secondary-side non-contact power supply pad 30b is disposed within the range of a significant magnetic field generated from the primary-side non-contact power supply pad 30a, as shown in FIG. You may install the support stand 44 on a pair of ground. In this case, instead of the stop line 37, a wheel stopper for positioning the front wheel of the forklift 33 may be provided on at least one of the pair of support bases 44.

  When power is supplied to the forklift 33 from the rear of the vehicle body without contact, the secondary non-contact power supply pad 30b is provided behind the seat 33a of the forklift 33 and above the counterweight 33d as shown in FIG. . The arrangement of the non-contact power supply pad 30b on the secondary side is realized, for example, by fixing a plate-like member capable of holding the non-contact power supply pad 30b on the secondary side to the rear of the seat 33a of the forklift 33. May be. On the other hand, the non-contact power supply pad 30 a on the primary side is disposed so as to face the seat rear surface of the forklift 33. For example, as shown in FIG. 24, the support member 48 that is fixed to the wall 47 and protrudes in the horizontal direction is placed on the primary side at the same height as the secondary non-contact power feeding pad 30b disposed on the forklift 33. The contactless power supply pad 30a may be supported. When the driver stops the forklift 33 with the stop line 37 as a mark, an induced voltage is generated by an alternating magnetic field generated from the primary non-contact power supply pad 30a supported by the support member 48. The secondary non-contact power supply pad 30b provided on the forklift 33 is pulled to the ground so as to be placed at the induced position.

  A support that can be expanded and contracted in the protruding direction by an actuator so that the secondary non-contact power supply pad 30b is securely disposed within the range of a significant magnetic field generated from the primary non-contact power supply pad 30a. Using the arm as the support member 48, the primary-side non-contact power feeding pad 30a approaches or moves away from the secondary-side non-contact power feeding pad 30b, and the primary-side non-contact power feeding pad You may enable it to adjust the space | interval between 30a and the pad 30b for non-contact electric power feeding of a secondary side. Further, instead of the stop line 37, a wheel stopper for positioning the rear wheel of the forklift 33 may be laid on the ground. Alternatively, as a member for guiding the forklift 33 so that the secondary-side non-contact power supply pad 30b is disposed within the range of a significant magnetic field generated from the primary-side non-contact power supply pad 30a, as shown in FIG. You may install the support stand 44 on a pair of ground. In this case, instead of the stop line 37, a wheel stopper for positioning the rear wheel of the forlift 33 may be provided on at least one of the pair of support bases 44.

  When power is supplied to the forklift 33 from the upper side of the vehicle body in a non-contact manner, the primary non-contact power supply pad 30 a is disposed so as to face the upper surface of the head guard 33 b of the forklift 33. For example, as shown in FIG. 25, the support member 50 that is fixed to the pillar 49 and protrudes in the horizontal direction is positioned higher than the head guard 33b of the forklift 33 so that a magnetic flux path is formed below the primary side. The contactless power supply pad 30a may be supported. When the driver stops the forklift 33 with the stop line 37 as a mark, an induced voltage is generated by an alternating magnetic field generated from the primary non-contact power supply pad 30a supported by the support member 50. The secondary non-contact power supply pad 30b provided on the forklift 33 is pulled to the ground so as to be placed at the induced position.

  A support that can be expanded and contracted in the protruding direction by an actuator so that the secondary non-contact power supply pad 30b is securely disposed within the range of a significant magnetic field generated from the primary non-contact power supply pad 30a. Using the arm as the support member 50, the primary-side non-contact power supply pad 30a approaches or moves away from the secondary-side non-contact power supply pad 30b in the lateral direction (horizontal direction). The lateral (horizontal) position of the primary non-contact power supply pad 30a relative to the non-contact power supply pad 30b on the side may be adjusted. Further, instead of the stop line 37, a wheel stopper for positioning the front wheel of the forklift 33 may be laid on the ground. FIG. 21 shows a member for guiding the forklift 33 so that the secondary-side non-contact power supply pad 30b is disposed within the range of a significant magnetic field generated from the primary-side non-contact power supply pad 30a. You may install the support stand 44 on a pair of ground. In this case, instead of the stop line 37, a wheel stopper for positioning the front wheel of the forklift 33 may be provided on at least one of the pair of support bases 44.

  When the secondary non-contact power supply pad 30b is provided in the space behind the back cover 33c provided on the back of the body of the forklift 33, the secondary non-contact is provided inside the forklift 33 as shown in FIG. It is possible to install the power supply pad 30b. The back cover 33c can be opened and closed. By opening the back cover 33c, the battery 31 installed inside the vehicle body of the forklift 33 can be maintained. 26A shows a state where the back cover 33c is closed, and FIG. 26B shows a state where the back cover 33c is open. When power is supplied to the forklift 33 in a non-contact manner, the primary-side non-contact power supply pad 30a is disposed so as to face the secondary-side non-contact power supply pad 30b provided in the space behind the back cover 33c. Is done. For example, as shown in FIG. 27, using a carriage 51 comprising a base 51a, a vertical column 51b protruding in the vertical direction from the base 51a, and a support member 51c protruding in the horizontal direction from the vertical column 51b, the carriage 51 is used. The support member 51c supports the primary non-contact power supply pad 30a so as to face the secondary non-contact power supply pad 30b provided on the forklift 33, and the carriage 51 is moved to move the primary side The contactless power feeding may be performed by bringing the contactless power feeding pad 30a closer to the secondary contactless power feeding pad 30b. When the back cover 33c is made of resin, non-contact power feeding can be performed with the back cover 33c closed as shown in FIG.

  In this way, the secondary-side non-contact power supply pad 30 b is fixed in the space inside the back cover 33 c of the forklift 33 that covers the storage space of the battery 31, so that the secondary-side non-contact power supply pad 30 b is placed inside the forklift 33. Since the contact power supply pad 30b can be installed, the secondary non-contact power supply pad 30b is not exposed outside the forklift 33, and the influence of the external environment is influenced by the secondary non-contact power supply pad. It becomes possible not to receive 30b. In addition, the non-contact power supply pad 30b on the secondary side can be installed using the empty space of the forklift 33.

  23, when a secondary non-contact power supply pad 30b is disposed on one side or side of the vehicle body, or behind the seat 33a of the forklift 33 as shown in FIG. When the secondary-side non-contact power supply pad 30b is disposed, for example, as shown in FIG. 27, the support member 51c of the carriage 51 is connected to the secondary-side non-contact power supply pad 30b provided on the forklift 33. By supporting the primary-side non-contact power supply pad 30a so as to be opposed to each other, and moving the carriage 51 to bring the primary-side non-contact power supply pad 30a closer to the secondary-side non-contact power supply pad 30b, You may perform non-contact electric power feeding.

  Next, the case where the casing 52 that holds the secondary-side non-contact power supply pad 30b in advance is used will be described. For example, as shown in FIG. 28, the housing 52 includes a pad storage portion that forms a gap 52a that can be stored by making the primary non-contact power supply pad 30a face the non-contact power supply pad 30b on the secondary side. 53, for example, as shown in FIG. 29, is disposed under the seat 33a of the forklift 33. However, the position where the casing 52 is disposed is not particularly limited, and may be disposed on the side surface of the vehicle body of the forklift 33 as shown in FIG. 30, for example, or on the floor of the driver's seat as shown in FIG. You may install, for example, as shown in FIG. 32, you may arrange | position on the side surface of the operation console 33e. When performing non-contact power supply, as shown in FIG. 28, the primary-side non-contact power supply pad 30a is stored in the gap 52a.

  Thus, the driver's skill is achieved by using the casing 52 in which the primary non-contact power supply pad 30a is opposed to the secondary non-contact power supply pad 30b so that the gap 52a is formed. Regardless, the battery 31 of the forklift 33 can be reliably charged. In addition, the degree of freedom of arrangement of the non-contact power supply pad 30b on the secondary side is improved. Moreover, it is not necessary to embed the primary-side non-contact power supply pad 30a in the ground or fix it to a wall or a pillar, thereby reducing the time and cost required for laying the primary-side non-contact power supply pad 30a. be able to.

  As shown in FIG. 28, the housing 52 is not limited to a configuration that covers the entire rear surface of the primary-side non-contact power supply pad 30a. For example, as shown in FIG. 33, the housing 52 may be configured to cover a part of the rear surface of the primary-side non-contact power supply pad 30a. 33 (a) is a perspective view, FIG. 33 (b) is a plan view (top view), FIG. 33 (c) is a side view, and FIG. 33 (d) is a front view.

  As described above, according to the present embodiment, since the position difference between the ferrite 7 and the coils 9 and 10 does not easily occur and a pad that can easily obtain a desired feeding range or feeding distance is used, the forklift is used. Charging the mounted battery can be realized more reliably. Also, by making each coil 9, 10 two or more stages outside the end of each row of ferrite 7, the magnetomotive force of the primary and secondary non-contact power supply pads 30a and 30b becomes stronger, Performance can be improved.

  In the present embodiment, the counter-balance type electric forklift (battery vehicle) has been described as an example of the non-contact charging system for forklifts. However, the non-contact charging system for forklifts in this embodiment is illustrated in FIG. 34, for example. As shown, it can also be applied to a reach type electric forklift (battery vehicle) 54. The non-contact charging system shown in FIG. 34 corresponds to the non-contact charging system shown in FIG. 16, but variations and other examples of the non-contact charging system described in this embodiment are also shown in FIG. As with the contact charging system, it can be applied to reach-type forklifts.

DESCRIPTION OF SYMBOLS 1 1st jig 2 1st pin 4 Back plate 5 Floor board 6, 6a-6d Auxiliary member 7 Ferrite 8 Side board 9, 10 Coil 11 Lid 12 2nd jig 13 2nd pin 15, 16 Magnetic pole area | region 17 Adhesive resin 19 Second ferrite 21 High frequency power supply device 22 Battery 23 Charger 24 Commercial power supply 25 Magnetic flux path 30a Primary side non-contact power supply pad 30b Secondary side non-contact power supply pad 31 Battery 32 Charger 33 Counter balance type electric Forklift 34 Rectifier 35 Wheel 35a Front wheel 35b Rear wheel 36, 44 Support base 38 Elastic body 39 Top plate 40 Recess 52 Case 52a Clearance 53 Pad storage part 54 Reach type electric forklift

Claims (33)

A magnetic body is arranged on the floor plate so that the magnetic material is positioned with respect to a first direction in which a magnetic flux path is to be formed and a second direction orthogonal to the first direction by a plurality of auxiliary members for positioning. Process,
Injecting an adhesive resin into a space surrounded by the floor plate and a side plate provided on the outer periphery of the floor plate;
Arranging the two coils side by side in the first direction such that the center of each of the two coils wound in a vortex overlaps the magnetic body;
Covering the space surrounded by the floor plate and the side plate with a lid;
A method of manufacturing a contactless power feeding pad, comprising: Before the step of placing the magnetic material,
A plurality of the first jigs provided with a plurality of first pins are brought close to a floor plate in which a plurality of first pin insertion openings are formed at positions corresponding to the plurality of first pins. Inserting the plurality of first pins into a one-pin insertion port and projecting the plurality of first pins from the floor plate ;
Attaching the auxiliary member to the plurality of first pins protruding from the floor board ,
After the step of covering the space surrounded by the floor plate and the side plate with a lid, the step of separating the first jig from the floor plate and removing the plurality of first pins from the plurality of first pin insertion openings. The method for manufacturing a contactless power feeding pad according to claim 1, comprising: After the step of covering the space surrounded by the floor plate and the side plate with a lid,
A second jig in which a plurality of second pins are erected is brought close to a lid formed with a plurality of second pin insertion openings at a position corresponding to the plurality of second pin insertion openings. The plurality of second pins are inserted into a two-pin insertion port, and the plurality of second pins protrude into a space surrounded by the floor plate , the side plate, and the lid, thereby forming the two coils. Inserting the second pin into the auxiliary member at a plurality of locations deviating from the position where the conducting wire is disposed;
3. The contactless power supply pad according to claim 2, further comprising a step of separating the second jig from the lid and extracting the plurality of second pins from the plurality of second pin insertion openings. Manufacturing method. Prior to the step of covering the space surrounded by the floor plate and the side plate with a lid, a plurality of second pin insertion ports are formed at positions corresponding to the plurality of second pin insertion ports. Including a step of approaching a second jig in which two pins are erected and inserting the plurality of second pins into the plurality of second pin insertion openings,
In the step of covering a space surrounded by the floor plate and the side plate with a lid, the floor plate and is projected a second pin of the plurality of the side plates and the enclosed by the lid space, to form the two coils respectively Inserting the second pin into the auxiliary member at a plurality of locations away from the position where the conducting wire is disposed,
After the step of covering the space surrounded by the floor plate and the side plate with a lid, the step of separating the second jig from the lid and removing the plurality of second pins from the plurality of second pin insertion openings. The method for manufacturing a contactless power feeding pad according to claim 2, comprising:   5. The method for manufacturing a contactless power feeding pad according to claim 1, wherein, in the step of arranging the magnetic body, a plurality of magnetic bodies are arranged in contact with each other in the first direction. .   2. The step of arranging magnetic bodies, wherein a plurality of magnetic bodies are arranged at intervals in the second direction according to the auxiliary members provided at intervals in the second direction. The manufacturing method of the pad for non-contact electric power feeding of any one of thru | or 5.   6. The method of manufacturing a contactless power feeding pad according to claim 1, wherein in arranging the magnetic body, a plurality of magnetic bodies are arranged in contact with each other in the second direction. .   In the step of arranging the two coils, the height of the auxiliary member is the same as or lower than the upper surface of the magnetic body so that a part of each coil overlaps the auxiliary member. The method for manufacturing a contactless power feeding pad according to claim 1, wherein two coils are arranged.   In the step of arranging the two coils, at a place where the height of the auxiliary member is higher than the upper surface of the magnetic body, the auxiliary member protrudes from a space formed in the central portion of each coil. The method for manufacturing a contactless power supply pad according to claim 1, wherein the two coils are arranged.   The method for manufacturing a contactless power feeding pad according to claim 9, wherein the step of injecting the adhesive resin is performed after the step of arranging the two coils.   In the step of disposing the two coils, portions wound around two or more stages of the coils are respectively disposed outside both ends of the first direction in the entire region where the magnetic body is disposed. 11. The contactless power supply pad manufacturing method according to claim 1, wherein a portion of each coil wound around the upper surface of the magnetic body is disposed in one stage. 11. Method.   The method for manufacturing a contactless power feeding pad according to claim 1, wherein in the step of arranging a magnetic body, the auxiliary member is inserted into a hole provided in the magnetic body.   2. The method according to claim 1, further comprising: disposing a second magnetic body in contact with an upper surface of the magnetic body at both ends in the first direction in the entire area where the magnetic body is disposed. 13. A method for manufacturing a non-contact power supply pad according to any one of 12 above.   A step of disposing a second magnetic body in contact with an upper surface of the magnetic body at both ends in the first direction in the entire region in which the magnetic body is disposed, and disposing the second magnetic body 13. The contactless power supply pad according to claim 12, wherein the auxiliary member protruding from the upper surface of the magnetic body is inserted into a second hole provided in the second magnetic body. Production method.   The height of the said auxiliary member is higher than the upper surface of the said magnetic body in the area | region except the area | region where the conducting wire which each forms the said two coils is arrange | positioned, The any one of Claim 1 thru | or 14 characterized by the above-mentioned. The manufacturing method of the pad for non-contact electric power feeding of description.   The method of manufacturing a contactless power feeding pad according to claim 15, wherein a height of the auxiliary member is higher than an upper surface of the magnetic body at a central portion of the floor board in the first direction. A housing including a floor plate, a side plate provided on an outer peripheral portion of the floor plate, and a lid covering a space surrounded by the floor plate and the side plate;
A magnetic body disposed on the floor board;
A plurality of auxiliary members surrounding the magnetic body;
Two coils each wound in a vortex, each coil overlapping with the magnetic body and arranged side by side in a first direction in which a magnetic flux path is formed;
An adhesive resin filled in a space surrounded by the floor plate and the side plate;
A pad for contactless power feeding, comprising:   The contactless power feeding pad according to claim 17, comprising a plurality of magnetic bodies arranged in contact with each other in the first direction.   18. A plurality of magnetic bodies arranged at intervals in a second direction orthogonal to the first direction, wherein the auxiliary member is provided between the magnetic bodies. The pad for non-contact electric power feeding as described in 18.   The contactless power supply pad according to claim 17, comprising a plurality of magnetic bodies arranged in contact with each other in a second direction orthogonal to the first direction.   The two coils are arranged such that a part of each coil overlaps the auxiliary member at a location where the height of the auxiliary member is the same as or lower than the upper surface of the magnetic body. The contactless power feeding pad according to claim 17, wherein the pad is a contactless power feeding pad.   The two coils are arranged so that the auxiliary member protrudes from a space formed in a central portion of each coil at a location where the height of the auxiliary member is higher than the upper surface of the magnetic body. The pad for non-contact electric power feeding according to any one of claims 17 to 21 characterized by these.   Each of the two coils has a portion wound up and down in two or more steps and a portion wound in one step, and outside of both ends in the first direction in the entire region where the magnetic body is disposed. On the other hand, a portion of each coil wound around two or more stages is arranged, and a portion of each coil wound around one stage is arranged on the upper surface of the magnetic body. The contactless power feeding pad according to any one of claims 17 to 22.   The contactless power supply pad according to any one of claims 17 to 23, further comprising an auxiliary member inserted into a hole provided in the magnetic body.   25. The second magnetic body according to any one of claims 17 to 24, further comprising a second magnetic body disposed at both ends in the first direction in the entire region where the magnetic body is disposed, and in contact with an upper surface of the magnetic body. The pad for non-contact electric power feeding given in any 1 paragraph.   A second magnetic body disposed at both ends in the first direction of the entire region where the magnetic body is disposed and in contact with an upper surface of the magnetic body; and provided on the second magnetic body 25. The contactless power feeding pad according to claim 24, wherein the auxiliary member protruding from the upper surface of the magnetic body is inserted into the second hole.   27. The height of the auxiliary member is higher than the upper surface of the magnetic body in a region excluding a region where conductive wires forming the two coils are arranged, respectively. The contactless power supply pad described in 1.   28. The contactless power feeding pad according to claim 27, wherein a height of the auxiliary member is higher than an upper surface of the magnetic body at a center portion of the floor board in the first direction. A primary non-contact power supply pad connected to an AC power source;
A non-contact power supply pad on the secondary side disposed on a forklift equipped with a battery;
A rectifier disposed on the forklift for rectifying a current sent from the non-contact power supply pad on the secondary side;
With
The contactless power supply pads on the primary side and the secondary side are the contactless power supply pads according to any one of claims 17 to 28,
Non-contact power is supplied from the primary-side non-contact power supply pad to the secondary-side non-contact power supply pad to charge the battery mounted on the forklift. Contact charging system.   Pad storage that holds the secondary-side non-contact power supply pad in advance and forms a gap that can be stored with the primary-side non-contact power-feed pad opposed to the secondary-side non-contact power-feed pad 30. The non-contact charging system for a forklift according to claim 29, wherein a second housing having a portion is disposed on the forklift.   30. The non-contact charging system for a forklift according to claim 29, wherein the secondary-side non-contact power supply pad is fixed in a space inside a back cover of the forklift that covers the storage space of the battery. . A support base on which a wheel mounted on one side of the forklift can ride;
A primary non-contact power supply pad provided on the support base and connected to an AC power source;
A contactless power feeding pad on the secondary side disposed on the forklift equipped with a battery;
A rectifier disposed on the forklift for rectifying a current sent from the non-contact power supply pad on the secondary side;
With
The contactless power supply pad on the primary side is the contactless power supply pad according to claim 27 or 28,
The contactless power supply pad on the secondary side is the contactless power supply pad according to any one of claims 17 to 28,
The secondary side non-contact power supply pad is connected to the one side part of the forklift so that the power supplied from the primary side non-contact power supply pad can be received from below the one side part of the forklift. Is provided on the bottom or bottom of the
Non-contact power is supplied from the primary-side non-contact power supply pad to the secondary-side non-contact power supply pad to charge the battery mounted on the forklift. Contact charging system.   A side plate of the non-contact power supply pad on the primary side is joined to a top plate covering a recess provided on the support base via an elastic body, and the primary side from the top plate is inserted into the recess. The non-contact charging system for a forklift according to claim 32, wherein the non-contact power supply pad is suspended.

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