Power supply device

Abstract

To provide a power feeding device capable of changing an installation location with ease.SOLUTION: A power feeding device B that has a power feeding side terminal member 42 in contact with a mobile body side terminal member 85 included in a mobile body A1 to feed power to the mobile body A1, comprises: a mounting part 11 onto which the mobile body A1 goes up; and wheels 91 provided on the mounting part 11 so that the wheels can perform switching operation of the mounting part 11 between a movable state and an installation state by reversely turning around a horizontal shaft 94. Each wheel 91 has a turning shaft 92 for turning around the shaft crossing a mounting surface of the mounting part 11. The mounting part 11 is provided with a coupling part F that can be coupled with the mobile body A1 or the other mobile body A.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a power supply device, and more particularly to a power supply device that supplies power to or charges a mobile object. [Background technology]

[0002] A mobile body system has been proposed that consists of a mobile body and at least a charging device, and that includes a power supply unit connected to the charging device and a power receiving unit installed in the mobile body, and that when the mobile body stops at a predetermined position in a parking facility, the power supply unit and the power receiving unit are directly facing each other so that the direction of the magnetic flux supplied by magnetic coupling is approximately horizontal. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-061266 Summary of the Invention [Problem to be solved by the invention]

[0004] The charging device, which is a power supply device described in Patent Document 1, is configured such that once it is installed at an installation location, it cannot be easily moved thereafter. For example, when moving the charging device to another location, it must be lifted by a loading machine or manually moved to another location. As a result, moving the charging device described in Patent Document 1 requires additional equipment, which is costly, and places a physical burden on the worker.

[0005] The present invention has been made in view of the above-mentioned problems, and has an object to provide a power supply device whose installation location can be easily changed. [Means for solving the problem]

[0006] This invention is A power supply device having a power supply side terminal member that contacts a movable body side terminal member of a movable body to supply power to the movable body, the power supply device includes a mounting portion on which the moving body can climb; the placing portion the outer or inner side of The placement unit is set in a movable state. In an ungrounded state, and ground a wheel capable of switching between a horizontal and vertical state by rotating in a reverse direction around a horizontal axis; Equipped with 、 The wheels of the mounting unit in a ground contact state and a non-ground contact state in a movable state are provided at positions not located on the mounting surface of the mounting unit. A power supply device characterized by: relates to.

[0007] The present invention further provides: The wheel has a pivot shaft that pivots around an axis that intersects with a mounting surface of the mounting portion; A power supply device comprising: relates to.

[0008] The present invention further provides: a connecting portion on the mounting portion that can be connected to the moving body or another moving body; A power supply device comprising: relates to. [Effects of the Invention]

[0009] The present invention provides a power supply device whose installation location can be easily changed. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a plan view showing a state in which a carrier and a coupling part are attached to a power supply device according to an embodiment of the present invention, the wheels are in a ground contact state, and the power supply device is towed by a moving object. [Figure 2] 1 is a side view of a power supply device according to an embodiment of the present invention, with a carrier and a coupling portion attached thereto, wheels in a grounded state, and being towed by a moving object. [Figure 3] 1 is a front view of a power supply device according to an embodiment of the present invention, in which a wheel is in a grounded state. [Figure 4]1 is a rear view of the power supply device according to the embodiment of the present invention, with the carrier and the coupling unit attached, and the wheels in a grounded state (shown by solid lines), while the wheels in a non-grounded state (shown by two-dot chain lines) are shown. [Figure 5] 1 is an enlarged front view of a power supply unit in a power supply device according to an embodiment of the present invention, showing a state in which a second arm is in a retracted position, and a protective cover is shown with a portion cut away. [Figure 6] 1 is an enlarged front view of a power supply unit in a power supply device according to an embodiment of the present invention, showing a state in which a second arm is in a retracted position, and a protective cover is shown with a portion cut away. [Figure 7] 1 is an enlarged side cross-sectional view of a power supply unit in a power supply device according to an embodiment of the present invention, showing a state in which a second arm is in a retracted position. [Figure 8] 1 is an enlarged plan view showing a state in which a carrier and a connecting part are attached to a power supply device according to an embodiment of the present invention and the towing vehicle is towed by a moving object. The power supply device and the towing vehicle are bent in a turning direction (steering direction) relative to each other around a connecting shaft, and movement in the bending direction is restricted by a restricting part. [Figure 9] 1 is an enlarged cross-sectional side view of a main portion of a power supply device according to an embodiment of the present invention, with a loading platform and a connecting portion attached thereto, and the loading platform and the connecting portion enlarged. [Figure 10] 1 is a partially enlarged plan view showing a state in which a connecting part is directly attached to a power supply device according to an embodiment of the present invention and the power supply device and the towing vehicle are towed by a moving object, and the state in which the power supply device and the towing vehicle are bent in the turning direction (steering direction) relative to the connecting shaft and the movement in the bent direction is restricted by a restricting part. [Figure 11] 1 is an enlarged cross-sectional view of a main part of a power supply device according to an embodiment of the present invention, in which a connecting portion is attached to the power supply device and the connecting portion is enlarged and cut away. [Figure 12]FIG. 1 is a side view of a mobile body for charging according to an embodiment of the present invention, in a power supplying state, being towed by a mobile body for towing. The power supplying device is attached to a loading platform and a coupling part, and the wheels are in a grounded state. The figure shows a side view of a state in which the mobile body is moved rearward (toward the support part) with the power supply terminal member and the mobile body terminal member in contact, and the side part at the tip of the mobile body swings the first arm to operate the switch. The electrode cover is in an exposed state, and is further rotated toward the exposed side by the protruding piece. The first arm swings when pressed by the side part at the tip of the mobile body, pressing the switch, and the biasing body is extended. [Figure 13] FIG. 3 is a flow chart showing the operation of the power supply device according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] A moving body A, which is a towing vehicle according to an embodiment of the present invention, a power supply device B, a coupling portion F, a loading platform G, and a wheel portion H will be described with reference to the drawings. The outline of the configuration relating to power feeding of the power feeding device B will be explained. The power supply device B comprises a mounting section 11 having an access road 12 at one end through which the mobile body A1 (or a mobile body (towing vehicle) A) to be charged can enter, a power supply section C for supplying power to the mobile body A, and a support section 21 provided at the other end of the mounting section 11. The power supply unit C includes a first arm 31 rotatably supported on the support unit 21, a second arm 41 rotatably supported on the support unit 21 and provided with a power supply side terminal member 42, a biasing body 35 that applies a force to rotate the second arm 41 toward the first arm 31, and a restricting unit 33 that restricts the first arm 31 from approaching the second arm 41. Reference numeral 34 denotes an attachment position adjustment portion. The attachment position adjustment portion 34 is a portion that makes it possible to adjust the attachment position of the restriction portion 33 relative to the first arm 31, and by changing the position of the restriction portion 33, it is possible to restrict the distance that the first arm 31 approaches the second arm 41.

[0012] The placing section 11 is provided in the power supply device B. The placing section 11 is capable of allowing the moving object A1 to climb onto it for charging. One end of the placement portion 11 has an access path 12 through which the moving object A1 to be charged enters toward the power supply side terminal member 42. The mobile body A1 to be charged enters the power supply part C from the access path 12 of the mounting part 11 and climbs onto the mounting part 11, and eventually the power receiving part D of the mobile body A1 to be charged comes into contact with the power supply part C, thereby entering a power supply state. The power receiving unit D includes a movable body terminal member 85 that comes into contact with the power supply side terminal member 42 of the power supply unit C in the power supply device B.

[0013] The placing section 11 is provided as a platform that is U-shaped in plan view. The power supply section C is located in the center of the U-shaped recess of the placing section 11. An access path 12 is formed at the open end. The mobile object A1 to be charged can climb onto the placing section 11 from the access path 12. The access paths 12 that the traveling section 71 climb onto are provided in two places on one end side of the placing section 11. The platform 11, which is U-shaped, has an open section E that is open below the mobile object A1 for charging in a powered state. The open section E, which is surrounded by the platform 11, is open below the mobile object A1 for charging except for the area where the traveling section 71 comes into contact. The opening E can reduce the ground contact area when installing the power supply device B. The reduction in the ground contact area improves the chances of stable grounding of the power supply device B when it is installed on the installation surface. In the embodiment, the opening E ensures that there are no obstructions between the installation surface on which the power supply device B is installed and below the mobile object A.

[0014] Even if there is an obstacle protruding upward toward the moving object A1 to be charged between the placing surface, which is the placing portion 11, the placing surface can be installed on the installation surface so as to step over the obstacle and avoid it, thereby reducing the influence of the condition of the installation surface. In addition, the height of the obstacle may be a height that reaches near the bottom of the main body frame 75, which is a height that a moving object that has climbed onto the placing portion 11 can step over. The open area E is not necessarily free from obstructions on the installation surface and below the moving body. If there are no portions of the mounting sections 11 in the open area E that are in direct contact with the installation surface, the open area E may have connecting members that do not contact the installation surface but connect the mounting sections 11 on the left and right sides of the moving body A in the traveling direction. In this case, it is possible to attach equipment and components that can expand the functionality of the power supply device B to the connecting members while avoiding obstacles, which is useful.

[0015] When the mobile object A1 to be charged (or the mobile object (towing vehicle) A) is in a powered state, the distance between the mounting unit 11 and the mobile object A1 to be charged in the longitudinal direction is set to be longer than the distance between the front and rear wheel axles, which is the wheelbase of the traveling unit 71 of the mobile object A1 to be charged. In the case of the embodiment, the distance between the mounting unit 11 and the mobile object A1 to be charged in the longitudinal direction is set to be longer than the front-to-rear ground contact length of the traveling unit 71. Therefore, when in a powered state, the entire traveling unit 71 can be positioned on the mounting unit 11, and the mobile object A1 to be charged can be stably placed on the power supply device B.

[0016] By configuring the traveling section 71 of the moving body A1 for charging to be located on the placement section 11, the moving body A1 for charging can be moved together with the power supply device B. For example, by lifting the power supply device B with a crane device or lifting it from below with a lifting device, it is possible to move the power supply device B and the mobile body A1 to be charged together without having to support the mobile body A1 separately.

[0017] When the moving object A1 to be charged heads toward the power supply unit C from the entrance 12, the moving object A1 to be charged heads toward the power supply unit C, while aligning the position and orientation of the power receiving unit D of the moving object A1 to be charged with the position and orientation of the power supply unit C, and advances so that they face each other. That is, the moving object A1 to be charged heads toward the second arm 41 while aligning the position of the power receiving unit D, which is located in the center of the lower part of the main body frame 75 in the direction of travel, with the position of the second arm 41, and must then advance backward toward the second arm 41 on the placement unit 11 in a direction intersecting the rotation axis of the second arm 41, and then move appropriately on the placement unit 11 toward the second arm 41, which is the power supply unit C.

[0018] Reference numeral 15 denotes a guide plate. The mounting portion 11 is provided with the guide plate 15. The guide plate 15 is made of a rectangular plate-shaped member. A pair of guide plates 15 are provided on the left and right outer sides of the moving body A1 to be charged placed on the mounting portion 11 in the direction of travel of the moving body A1 to be charged, facing each other with the running portion 71 of the moving body A1 to be charged in between. Guide plate 15 is arranged along entrance path 12 of each mounting portion 11, extending from entrance path 12 toward power supply portion C. An upper portion of guide plate 15 is provided with folded portion 16 that is bent obliquely toward the outside of mounting portion 11.

[0019] The folded portion 16 at the top of the guide plate 15 prevents the mobile object A1 to be charged, which moves along the guide plate 15, from sliding downward along the slope of the folded portion 16 even if it tries to forcibly climb onto the guide plate 15. Therefore, the guide plate 15 not only prevents the mobile object A1 to be charged from turning, but also prevents it from climbing over the guide plate 15. Furthermore, even if the running unit 71 equipped with crawlers shown in the figure has a stronger ground contact driving force than the running unit 71 mainly composed of wheels (not shown), the running unit 71 that runs along the guide plate 15 and climbs over the folded portion 16 will slide down. Therefore, the running unit 71 can be prevented from climbing over the guide plate 15 and departing from the placement unit 11. The guide plate 15 allows the moving body A1 to be charged to enter the appropriate placement part 11 and moves the moving body A1 to be charged appropriately toward the power supply part C on the placement part 11, and prevents the moving body A1 to be charged from turning.

[0020] The opposing distance, which is the distance between the opposing surfaces of the guide plates 15, is set to be slightly larger than the overall width of the pair of traveling sections 71. In this embodiment, the opposing distance of the guide plates 15 is set to be slightly larger by about 101 to 105% than the overall width of the pair of traveling sections 71 provided on the left and right of the mobile object A1 to be charged. This opposing distance makes it possible to accurately align the left-right positions of the power receiving unit D and the power supply unit C of the mobile object A1 to be charged that has entered from the entrance road 12 with respect to the mobile object A1 to be charged. The distance between the guide plate 15 and the moving object A1 for charging is longer than the axle distance, and is provided continuously from the access road 12 toward the power supply unit C. In other words, the length of the guide plate 15 is longer than the ground contact length. It can also be said that the distance between the guide plate 15 and the moving object A1 for charging in the direction parallel to the traveling direction is longer than the axle distance between the front and rear wheel axles of the traveling unit 71.

[0021] In this way, the mobile body A1 for charging enters from the entrance road 12 while aligning the left and right positions of the power receiving part D and the power supply part C, and since the running part 71 is positioned so as to be sandwiched between the guide plates 15 even after entering, it can move toward the power supply part C along the guide plates 15 without turning. The length of the guide plate 15, which is arranged parallel to the traveling direction of the mobile object A1 to be charged, is long and continuous relative to the traveling section 71, so even if the mobile object A1 to be charged tries to turn suddenly while moving on the device section, the turning is prevented by the guide plate 15. In other words, the mobile object A1 to be charged that enters from the entrance path 12 can maintain the positional relationship between the power supply unit C and the power receiving unit D with respect to the left and right of the traveling direction.

[0022] On the approach path 12 side of each guide plate 15, there is provided an approach guide section 14 that forces a mobile object A1 to be charged entering from the approach path 12 to be positioned between the guide plates 15. The approach guide sections 14 are plate-shaped and are provided so that their width increases from the power supply section toward the approach path 12 in a plan view. Even if the orientation or position of the mobile object A1 to be charged is misaligned with respect to the power supply section C, the approach guide sections 14 allow the mobile object A1 to be positioned between the guide plates 15 by traveling along the approach guide sections 14 without any special operation by the operator or observer, and the relationship in position and orientation between the power supply section C and the power receiving section D can be adjusted or maintained.

[0023] A slope 13 is provided on the access path 12. The slope 13 is provided on the access path 12 side of the mounting unit 11, and one end is a horizontal axis 18 facing left and right that intersects with the traveling direction of the mobile object A1 to be charged, and the other end is provided so that it can rotate and turn up and down. The slope 13 can rotate so that its tip touches the installation surface even on an uneven installation surface, thereby assisting the mobile object A1 to be charged to enter the mounting unit 11. Even if the access path 12 is raised above the installation surface, the other end of the slope 13 can touch the installation surface, so there are no restrictions on the installation location of the power supply device B.

[0024] An adjuster 17 that can be brought into contact with the installation surface and can adjust the installation height is provided below the mounting portion 11. The adjuster 17 can be adjusted to protrude from and retract into the bottom surface of the mounting portion 11 in the vertical direction. The adjuster 17 prevents the power supply device B from tilting or swinging even if the ground below the placing part 11 is uneven with unevenness or the like, and the moving body A1 for charging can easily enter the placing part 11.

[0025] In the power supply device B of this invention, when the mobile body A1 to be charged moves backward through the access path 12 of the mounting base of the power supply device B and approaches a power supply position where power can be supplied, the power supply side terminal member 42 comes into contact with the mobile body side terminal member 85 provided on the mobile body A1 to be charged, thereby enabling electricity to be supplied. More specifically, as the self-propelled moving body A1 to be charged approaches the support post 21, the second arm 41 having the power supply-side terminal member 42 in the lying state rises, and the power supply device B enters an upright state, and the power supply-side terminal member 42 comes into contact with the moving body-side terminal member 85 provided on the moving body A1 to be charged, thereby supplying power to the moving body A1 to be charged. Note that the explanation in this embodiment will be given assuming that the supply power is DC.

[0026] The mobile-body-side terminal member 85 is disposed under the main body frame 75 at the rear end, which is one end of the mobile body A1 for charging. The mobile-body-side terminal member 85 is a flat, conductive member with its surface facing downward. The mobile-body-side terminal member 85 also has a pair of positive and negative electrodes, which are disposed side by side in the center of the left and right sides of the main body frame 75 in the direction of travel. Power can be supplied when the positive and negative electrodes of the mobile-body-side terminal member 85 come into contact with the positive and negative electrodes of the power-supply-side terminal member 42, respectively.

[0027] The first arm 31 is provided on the power supply device B so as to be pushed by the moving body A1 to be charged as the moving body A1 to be charged travels, thereby being able to swing in the direction of travel of the moving body A1 to be charged. First arm 31 is a long member oriented diagonally upward so that its upper portion is closer to the moving body A1 to be charged, and is rotatably supported on the lower part of support part 21 so that its upper portion, which is the other end, swings back and forth around pivot shaft 32. The pivot shaft of first arm 31 is oriented in a direction intersecting the traveling direction of moving body A1 to be charged. The first arm 31 is pushed by the moving body A1 for charging as the moving body A1 for charging moves forward, and is thereby capable of swinging in the direction of travel of the moving body A1 for charging.

[0028] The second arm 41 is a long member, one end of which is supported by the support column 21, and the other end of which is movable up and down. In the embodiment, the one end of the second arm 41 is provided on a rotation fulcrum shaft 32 that is coaxial with the one end of the first arm 31, but this is not necessarily limited to this. For example, the rotation fulcrum shaft 32 on the one end of the second arm 41 may be provided at a position different from and parallel to the fulcrum shaft on the one end of the first arm 31. Second arm 41 is made of an insulating material, so that electricity flowing through power supply side terminal member 42, which is a conductive member provided at the tip of the other end of second arm 41, is not transmitted to other members of power supply device B (for example, first arm 31 or support part 21) via second arm 41. In the embodiment, second arm 41 is made of a plastic resin, but the material of second arm 41 is not limited as long as it is made of an insulator that can achieve the purpose of insulation.

[0029] Two second arms 41 are provided as a pair, and are arranged parallel to each other. The other end of second arm 41 rotates up and down around rotation fulcrum shaft 32 from a storage position in which it is laid down with its longitudinal direction facing approximately horizontal to a power supply position in which it is raised from the horizontal position in its longitudinal direction. Each of the two second arms 41 rotates independently about rotation fulcrum shaft 32, and the first arm 31 and second arm 41 rotate independently. The second arm 41 is capable of swinging in conjunction with the first arm 31, and has a power supply side terminal member 42 that approaches a movable body side terminal member 85 provided on the movable body A1 side for charging when the first arm 31 is pushed by the movable body A1 for charging, and can come into contact with the movable body side terminal member 85.

[0030] The biasing member 35 is provided on the first arm 31. The biasing member 35 applies a force to the second arm 41 in a direction that moves it closer to the first arm 31 side. The biasing body 35 is provided so as to bridge the intermediate portion of the first arm 31 and the intermediate portion of the second arm 41. In this embodiment, the biasing body 35 uses a tension coil spring, which is an elastic body, and a biasing force is always applied so that the other ends of the first arm 31 and the second arm 41 approach each other. The biasing body 35 is provided on each of the two second arms 41.

[0031] In this embodiment, the restricting portion 33 is a pentagonal piece member provided on the side of the middle portion of the first arm 31. One side of the restricting portion 33 comes into contact with the second arm 41, thereby restricting the first arm 31 and the second arm 41 from rotating in a direction in which they approach each other. The restricting portion 33 is provided to prevent the first arm 31 and the second arm 41 from coming too close to each other due to the biasing body 35. A restricting unit 33 is provided to prevent the first arm 31 and the second arm 41 from becoming less than a predetermined sandwiching angle and to prevent the distance between their other ends from becoming less than a predetermined distance. This prevents the first arm 31 from tilting excessively downward when the second arm 41 is in a storage position where it is lying face down parallel to the mounting unit 11. The restricting unit 33 is provided so that its mounting position relative to the first arm 31 can be shifted by an attachment position adjusting unit 34, making it possible to adjust the sandwiching angle between the first arm 31 and the second arm 41 as needed. The attachment position adjusting unit 34 allows the first arm 31 to be in an appropriate posture, and the contact position between the first arm 31 and the mobile object A1 for charging can be adjusted appropriately.

[0032] The restricting unit 33 is provided so that the angle between the first arm 31 and the second arm 41 can be adjusted, so that the contact position of the first arm 31 of the moving body A1 for charging, which moves up and down due to wear of the running part 71 of the moving body A1 for charging (wear of the track shown in the embodiment, or wear of the tire etc. in the embodiment not shown), can be appropriately adjusted to an appropriate position. In other words, the moving body A1 for charging can push the same position on the first arm 31, so the timing at which the second arm 41 rises can be made the same regardless of the height of the moving body A1 for charging.

[0033] The support pillar 21 is on the fulcrum side of the first arm 31 and is fixed to the mounting portion 11 provided on the power supply device B, which is a mounting base. The support pillar 21 is provided to protrude upward firmly enough so that it will not deform even if it is pushed or hit by the moving object A1 to be charged. The support part 21 restricts the swinging in the pushed direction as the moving body A1 for charging advances on the first arm 31, and forcibly stops the advancement of the moving body A1 for charging via the first arm 31. The upper portion, which is the other end side of the first arm 31 that is rotatable relative to the support column 21, is contacted by a side portion 77, which is the tip of the moving body A1 for charging, after the moving body A1 for charging enters from the entrance path 12 and gradually approaches the first arm 31. Furthermore, the moving body A1 for charging is advanced toward the support column 21, and the first arm 31 is pushed by the side portion 77 of the moving body A1 for charging, causing it to swing toward the support column 21. When the first arm 31 swings toward the support column 21, the first arm 31 comes into contact with the support column 21, and further swinging is restricted. The moving body A1 to be charged is restricted from moving any further by the support column 21 via the first arm 31.

[0034] A switch 22 is provided on the upper part of the support pole 21 of the power supply device B. The switch 22 is operated when the moving object A1 to be charged presses the switch 22 toward the support pole 21 via the first arm 31. Whether the switch 22 is operated or not is one of the conditions for determining whether or not power is supplied to the battery 76, which is the power storage device of the moving object A1 to be charged, via the power supply-side terminal member 42 and the moving object-side terminal member 85. The switch 22 is operable by swinging the first arm 31, and the power supply unit C starts supplying power to the battery 76 on the condition that the operation is completed and contact between the movable body side terminal member 85 and the power supply side terminal member 42 is completed.

[0035] The power supply side terminal member 42 will now be described. The power supply side terminal member 42 contacts the mobile object side terminal member 85 that can be exposed downward from the mobile object A1 to be charged, and supplies power to the mobile object A1 to be charged. A power supply-side terminal member 42 is disposed at the tip end of each of the two second arms 41 on the other end side. One of the power supply-side terminal members 42 is a positive electrode, and the other is a negative electrode. A pair of mobile body-side terminal members 85, which are power receiving-side terminal members on the mobile body A1 side for charging, are also provided, with one of the mobile body-side terminal members 85 being a positive electrode and the other being a negative electrode. Because the second arm 41 to which the power supply-side terminal members 42 are attached is made of an insulator, electricity applied to the power supply-side terminal members 42 does not leak to other members.

[0036] By bringing the positive electrode of the power supply side terminal member 42 into contact with the positive electrode of the mobile body side terminal member 85, and also bringing the negative electrode of the power supply side terminal member 42 into contact with the negative electrode of the mobile body side terminal member 85, and then applying a DC voltage from the power supply device B side, power can be supplied to and charged by the battery 76, which is a power storage device provided in the mobile body A1 for charging.

[0037] The contact surface 43 of the power supply side terminal member 42 with the movable body side terminal member 85 is provided as a flat surface, and the power supply side terminal member 42 is provided with a terminal fulcrum part 44 that enables the contact surface 43 to tilt and swing in the front-to-rear direction relative to the second arm 41. The axial direction of the terminal fulcrum part 44 is provided parallel to the rotation fulcrum axis 32 of the first arm 31 and the second arm 41. When the second arm 41 is in the stored position, the contact surface 43 is arranged so as to tilt upward and slightly toward the other end of the second arm 41. The power supply side terminal member 42 has a restricting pin 46 that protrudes toward the second arm 41 and is disposed in a hole 47 provided on the other end side of the second arm 41. The restricting pin 46 is provided movably within the hole 47 and restricts the rotation of the power supply side terminal member 42 around the terminal fulcrum part 44 so that the rotation is limited to the range up to which the restricting pin 46 comes into contact with the edge of the hole 47. The terminal fulcrum portion 44 is provided so that the second arm 41 can swing relative to the first arm 31 .

[0038] Reference numeral 45 denotes a terminal biasing body. The terminal biasing body 45 is provided on the power supply side terminal member 42. The terminal biasing body 45 rotates the power supply side terminal member 42, which rotates around the terminal fulcrum 44, in one direction. In the embodiment, the terminal biasing body 45 is disposed so that the contact surface 43 faces the other end of the second arm 41. The terminal biasing body 45 in the embodiment applies a rotational force to the power supply side terminal member 42 by applying a force to at least one side of the power supply side terminal member 42 using a leaf spring, but the type of biasing body may be any type as long as it is an elastic body such as a coil spring or a helical spring.

[0039] A protruding piece 61 is provided on the side of the second arm 41, which is on the side of the power supplying section C of the power supply device B. The protruding piece 61 is a member having a beak-shaped projection 63 in a side view at the tip facing the front of the moving object A1 for charging from the support section 21 side of the power supply device B, and is fixed to the mounting section 11, which is a mounting base. The protruding piece 61 is fixed to the power supply device B and protrudes from the power supply-side terminal member 42 towards the moving object A1 for charging. In this embodiment, the protruding piece 61 is formed of a plate-like member and is provided adjacent to the second arm 41 on the left side of the moving body A1 for charging in the forward direction.

[0040] The inclined portion 64 is provided on the protruding piece 61 so as to be inclined downward from the tip of the protruding piece 61 on the moving object A1 side for charging to the bottom of the protruding piece 61 toward the support part 21 side. The upper part of the inclined part 64 is disposed so as to protrude further toward the moving object A1 to be charged than the power supply side terminal member 42 in a side view, and reaches the lower part of the protruding part 63. The upper part of the protrusion 63 is provided in an arc shape so as to gradually slope downward from the upper end of the protruding piece 61 in a direction from the entrance path 12 of the moving body A1 for charging toward the support part 21.

[0041] The protrusion 63 has a slope 64 that slopes downward in an arc shape from the sharp tip of the protrusion 63 toward the support 21 from the entrance 12 of the mobile unit A1 for charging. In this embodiment, the slope 64 is arc-shaped. Therefore, the movement of the members sliding on the slope 64 is smooth. The inclined portion 64 is provided so that the angle of inclination gradually becomes vertical in the direction from the access path 12 of the mobile object A1 to be charged toward the support portion 21 and toward the lower end. The inclined portion 64 located at the bottom of the protruding piece 61 is provided so as to be almost vertical. In the embodiment, the inclined portion 64 is provided so as to be curved in an arc shape, but it may also be configured by combining multiple straight portions.

[0042] The positional relationship between the protruding piece 61 and the second arm 41 will be described. The protrusion 63 and the inclined portion 64 of the protruding piece 61 are disposed in a direction from one end toward the other end of the second arm 41, and are disposed at a position extending further toward the other end. In other words, the inclined portion 64 is disposed to protrude further toward the movable body A1 for charging than the power supply-side terminal member 42 in a side view. This allows the electrode cover 81 disposed on the movable body A1 for charging, which will be described later, to start rotating from the closed state toward the exposed state before the second arm 41 transitions from the retracted position to the power supply position. In addition, the positional relationship between the protruding piece 61 and the second arm 41 described above prevents the second arm 41 and the electrode cover 81 from interfering with each other until the power supply-side terminal member 42 of the second arm 41 moves toward the movable body-side terminal member 85 disposed on the movable body A1 for charging.

[0043] The positional relationship between the protruding piece 61 and the moving object A1 to be charged will be described. The protruding piece 61 is positioned in the width direction relative to the direction of travel of the moving object A1 to be charged, in agreement with an operating unit 82 (described later) provided on the electrode cover 81 of the moving object A1 to be charged. Furthermore, the upper end of the protruding piece 61 is positioned lower than the underside of the main body frame 75 of the moving object A1 to be charged. With this configuration, when the moving object A1 to be charged enters the mounting base 11 from the entrance path 12, the protruding piece 61 does not interfere with the main body frame 75, and the protruding portion 63 can reach the operating unit 82. Furthermore, as the moving object A1 to be charged enters, the operating unit 82 is pressed against the inclined portion 64 at the bottom of the protruding portion 63, thereby moving the operating unit 82 downward. In other words, the contact between the protruding piece 61 and the operating unit 82 rotates the electrode cover 81 from the closed state to the exposed state.

[0044] The positional relationship between the protruding piece 61 and the moving object A1 to be charged during power supply will be described. The lower part of the inclined part 64 formed from the protrusion 63 of the protruding piece 61 is disposed forward of the movable body-side terminal member 85 in the forward direction of the movable body A1 to be charged when the electrode cover 81 is in a completely exposed state in which the movable body A1 to be charged is ready to be charged. In other words, in a side view, the front end of the movable body-side terminal member 85 when the movable body A1 to be charged is in a powered state is disposed at a position that does not overlap with the lower part of the inclined part 64 in the front-rear direction of the movable body A1 to be charged. This allows the operating unit 82 to be moved significantly downward and forward of the movable body A1 to be charged to widely open the electrode cover 81.

[0045] The divided structure of the protruding piece 61 will be described. The protruding piece 61 may be divided and fixed to the power supply device B. In this embodiment, the protruding piece 61 is divided into a protruding piece main body 611 having a protrusion 63 for operating the operation unit 82, and an attachment part 62 of the protruding piece 61 for fixing the protruding piece main body 611 to the power supply device B. The attachment part 62 of the protruding piece 61 and the protruding piece main body 611 are fixed to each other by fastening members consisting of bolts and nuts. The attachment portion of the protruding piece 61 has an elongated hole 65, and the height position of the upper end of the protruding piece 61 can be adjusted by adjusting the fastening position of the fastening member within the elongated hole 65. As a result, even if the relative height of the main body frame 75 to the power supply device B changes due to wear of the running part 71 (crawler in this embodiment) of the mobile object A1 to be charged, by adjusting the vertical position of the main body of the protruding piece 61, the protruding piece 61 does not interfere with the main body frame 75, and the operating part 82 can be reliably operated at the inclined part 64.

[0046] A protective cover 51 is provided on the mounting portion 11 so as to cover the other end of the second arm 41, and the protective cover 51 is provided so that the second arm 41 can be projected and retracted toward the movable body side terminal member 85, and has a notch 511 through which the second arm 41 can pass. When the second arm 41 is in the retracted position, the protective cover 51 covers the other end of the second arm 41 and the upper part of the power supply-side terminal member 42. The protective cover 51 has a notch 511 at the upper part that allows the other end of the second arm 41 and the power supply-side terminal member 42 to pass through as the second arm 41 rotates between the retracted position and the power supply position. Furthermore, a shielding cover 52 is provided to cover the notch 511. The shielding cover 52 is made of a flexible, non-conductive, non-conductive material. In this embodiment, a rubber-like plate is used.

[0047] The shielding cover 52 has a slit 521 formed in a direction along the longitudinal direction of the second arm 41 in the storage position. The slit 521 is normally closed, and when the second arm 41 rotates, the other end of the second arm 41 and the power supply-side terminal member 42 push the shielding cover 52 aside, opening the slit 521, allowing the other end of the second arm 41 and the power supply-side terminal member 42 to appear and disappear from the protective cover 51. The slit 521 in the shielding cover 52 is formed by arranging the shielding covers 52 so that they overlap each other. The shielding covers 52 and the slit 521 cover the upper part of the second arm 41 in the storage position, preventing foreign matter from adhering to the power supply-side terminal member 42. The slit 521 formed by overlapping the shielding covers 52 tightly closes the gap, preventing foreign matter from easily passing through the slit 521 and entering below the shielding cover 52.

[0048] The mobile unit (towing vehicle) A and the mobile unit A1 to be charged will be described. In this embodiment, the moving body (tractor) A and the moving body A1 to be charged are self-propelled brush cutters. The moving body A1 to be charged can be applied to the present invention regardless of whether it is manually operated, including remotely controlled, or whether it runs independently under autonomous control. The mobile unit (towing vehicle) A and the mobile unit A1 for charging can move forward and backward and turn left and right as they move forward and backward. The mobile unit A1 for charging has a main frame 75 and running units 71 at the left and right ends of the main frame 75 in the direction of travel.

[0049] In this embodiment, the traveling unit 71 is a crawler device equipped with tracks, and the left and right turning is performed by the speed difference between the left and right tracks, causing the mobile unit A1 to move forward and backward and turn. The traveling unit 71 drives the drive wheels 72 with an electric motor, causing the tracks to move in circles, thereby moving the mobile unit A1 to charge. The moving body moves backward and approaches the power supply unit C. The traveling unit 71 does not have to be the crawler device shown in the figure, and may be a traveling unit 71 having a plurality of wheels (preferably four wheels).

[0050] In the case of a crawler device, it has at least a drive wheel 72 and an idler wheel 73, and may further have one or more rollers 74. In an embodiment of the present invention, any of the drive wheel 72, idler wheel 73, and roller 74 that are located on the rearward side relative to the traveling direction forming the contact length of the crawler device may be referred to as a rear wheel, and any of the drive wheel 72, idler wheel 73, and roller 74 that are located on the forward side relative to the traveling direction may be referred to as a front wheel. In this embodiment, the wheels 74 located on the rear side are referred to as rear wheels, and the idler wheels 73 located on the front side are referred to as front wheels. In this embodiment, the drive wheels 72 located on the rear side of each of the left and right sides are equipped with motors (not shown), and are driven to rotate by power from a battery 76.

[0051] The battery 76 is installed on the main body frame 75. The battery 76 is a power storage device that serves as a power source for the electric motor. The electric motor is driven to rotate by consuming power from the battery 76. A mobile body-side terminal member 85 is provided on the lower part of the main body frame 75 at the rear end, which is one end of the mobile body A1 to be charged, and power can be supplied to the battery 76 by contacting the power supply-side terminal member 42 provided on the power supply device B. With this configuration, the battery 76, which is a power storage device, can be charged without removing it from the mobile body A1 to be charged.

[0052] The electrode cover 81 is provided on the movable body A1 to be charged so as to surround the sides and bottom of the movable body-side terminal member 85. The electrode cover 81 is a container-shaped box-like member, and is provided so as to be rotatable, with a rotation fulcrum 83 located on the front side, which is the other end side, of the movable body A1 to be charged. The electrode cover 81 can be repositioned between a closed state in which it covers the movable body side terminal member 85 to prevent the intrusion of foreign matter, and an exposed state in which it exposes the movable body side terminal member 85 and makes it possible to connect it to the power supply side terminal member 42. The electrode cover 81 has an operating portion 82 that is operated by the protruding piece 61 to change the position of the cover from a closed state to an exposed state.

[0053] The electrode cover 81 rotates to freely change its position between a closed state in which it covers the periphery of the movable body side terminal member 85 to prevent the intrusion of foreign matter, and an exposed state in which it exposes the movable body side terminal member 85 and makes it possible to connect it to the power supply side terminal member 42. Of the rear side surface, which is the side surface opposite to the pivot point 83 of the electrode cover 81 in the closed state, the inner surface gradually faces upward toward the movable body A1 for charging as the electrode cover 81 transitions to the exposed state. Furthermore, when the electrode cover 81 reaches the end of its rotational direction toward the exposed state, the inner surface tilts upward and backward toward the movable body A1 for charging. In other words, even if there is a foreign object inside the electrode cover 81, by transitioning the electrode cover 81 to the exposed state, the foreign object can fall downward along the inner surface due to its own weight.

[0054] When the electrode cover 81 is changed from a closed state to an exposed state, the inner surface is tilted, allowing foreign matter and the like to fall due to gravity, and in the exposed state the operating unit 82 is positioned forward relative to the movable body side terminal member 85. In other words, in the exposed state the electrode cover 81 rotates until the operating unit 82 is positioned forward of the rotation fulcrum 83 of the electrode cover 81. By adopting such a positional relationship, the inner surface of the electrode cover 81 is reliably tilted.

[0055] Reference numeral 84 denotes an elastic body. The elastic body 84 constantly applies force to the side where the electrode cover 81 is in the closed state. The elastic body 84 is provided near the pivot fulcrum 83 of the electrode cover 81. In this embodiment, a coil spring is used as the elastic body 84, and the coil spring is incorporated into the hinge portion which is the pivot fulcrum 83. The elastic body 84 constantly applies force to the electrode cover 81 so as to rotate the rotatable electrode cover 81 towards the closed state.

[0056] The electrode cover 81 has an operating unit 82 at one end, which is the rear end in the direction of travel of the mobile object A1 to be charged. The operating unit 82 is a pin-shaped member that protrudes left and right from either the left or right side of the electrode cover 81 in the direction of travel. In this embodiment, the operating unit 82 is provided so as to protrude from the rear and left side of the electrode cover 81 in the direction of travel toward the left side in the direction of travel. The electrode cover 81 can be rotated between a closed state and an exposed state by operating the operating unit 82. In the exposed state, the operating unit 82 is positioned so as not to overlap vertically with the mobile object terminal member 85 of the mobile object A1 to be charged in the power supply state, as seen from the side. In other words, the operating unit 82 in the exposed state is positioned at the other end, which is the front end of the mobile object A1 to be charged via the mobile object terminal member 85.

[0057] In the closed state, the operating unit 82 is disposed with a gap between it and the underside of the main body frame 75. The protruding piece 61, which is a member for operating the operating unit 82, is inserted into this gap to change the electrode cover 81 from the closed state to the exposed state. The rear surface of the electrode cover 81, which is the side surface on which the operating portion 82 is disposed, is inclined downward in the exposed state, making it easier to expel foreign matter.

[0058] The operation and effect of the embodiment of the present invention in relation to power supply work will be described in conjunction with actual work. The retracted position of the second arm 41 when the moving object A1 to be charged is not placed on the placement unit 11, which is a placement stand, will be described. When the mobile object A1 to be charged is not placed on the mounting portion 11, the second arm 41 rotates downward by its own weight and assumes a stored position. At this time, the contact surface 43 of the power supply side terminal member 42 is biased by the terminal biasing body 45 and is disposed so as to be inclined upward and slightly horizontally, so that foreign matter on the contact surface 43 falls along the inclination, and the contact surface 43 can be kept clean. The upper part of the power supply side terminal member 42 is covered with the protective cover 51 and the shielding cover 52, so even if foreign matter falls from above, it will not adhere to the contact surface 43. In addition, since the slits 511 are provided so as to overlap each other, the slits 511 turn up to create gaps, preventing the intrusion of foreign matter through these gaps.

[0059] A force is applied to first arm 31 by biasing member 35 so as to bring it closer to second arm 41. At this time, restricting portion 33 restricts first arm 31 from completely falling toward second arm 41, so first arm 31 can maintain a state in which it is tilted obliquely relative to support portion 21. Before the moving object A1 to be charged enters the power supply device B, the electrode cover 81 of the moving object A1 to be charged is in a closed state, and the second arm 41 is in a stored position or in a stored state.

[0060] The following describes how the mobile object A1 approaches the placement section 11, which is a placement stand for the mobile object A1 to be charged. A moving object A1 to be charged enters the platform from the entrance path 12 and gradually approaches the support column 21 side. The moving object A1 to be charged is located on the access path 12 of the power supply device B, and is in the middle of entering the power supply device B. The electrode cover 81 of the moving object A1 to be charged is in the closed state. The second arm 41 is in the stored position or in the stored state.

[0061] The mobile body A1 for charging enters the access road 12 in a reverse state and approaches the support part 21. As it continues to enter, the side part 77 located at the tip of the mobile body A1 for charging eventually comes into contact with the upper part of the first arm 31 in a laid-down state. As the mobile body A1 for charging continues to advance backward into the power supply device B, the operating part 82 moves relative to the protruding piece 61 located below the main frame 75, and eventually the tip of the protruding part 63 is positioned between the operating part 82 and the main frame 75 and advances between them.

[0062] When the mobile object A1 for charging enters onto the power supply device B and moves on the placing part 11 toward the power supply part C, the second arm 41 remains in the stored position or stored state, and the protrusion part 63 of the protruding piece 61 is positioned between the operating part 82 and the main body frame 75. When the electrode cover 81 of the mobile body A1 for charging is in a closed state, the guide plate 15 restricts left and right deviation of the mobile body A1 for charging in the direction of travel, and the mobile body A1 for charging travels toward the power supply part C.

[0063] When the moving body A1 for charging further moves on the placing part 11 of the power supply device B toward the power supply part C, the inclined part 64 of the protruding piece 61 presses down the electrode cover 81 of the moving body A1 for charging, the moving body A1 for charging comes into contact with the first arm 31, and the electrode cover 81 of the moving body A1 for charging operates the operating part 82 by the protruding piece 61 between the operating part 82 and the main body frame 75, and is in the middle of rotating toward the exposed side. The second arm 41 is in the stored attitude or state. If the charging movable body A1 continues to move backward while the side portion 77, which is the tip of the movable body A1 for charging, remains in contact with the upper portion of the first arm 31, the first arm 31 will rotate toward the support portion 21 around the swing fulcrum axis. Furthermore, as the mobile body A1 for charging is moved toward the support portion 21, the operating portion 82 is pushed down while sliding along the inclined portion 64 of the protruding piece 61, causing the electrode cover 81 to rotate in the direction from the closed state to the exposed state.

[0064] Furthermore, when the moving body A1 for charging moves on the mounting portion 11 toward the power supply portion C of the power supply device B, the inclined portion 64 of the protruding piece 61 further presses down the electrode cover 81 of the moving body A1 for charging, and the moving body A1 for charging pushes the first arm 31 backward, causing the second arm 41 to rise and pass through the protective cover 51 (slit 521 of the shielding cover 52). The electrode cover 81 of the moving body A1 for charging is in the middle of rotating toward the exposed side by the protruding piece 61. The first arm 31 is pushed by the side part 77, which is the tip of the moving body A1 for charging, and swings toward the support part 21, and the second arm 41 is in the middle of rotating toward the power supply posture side in conjunction with the first arm 31.

[0065] In response to the rotation of the first arm 31, the second arm 41 starts to rise from the stored position via the biasing member 35, and the second arm 41 gradually rises in conjunction with the swinging of the first arm 31. When the operating unit 82 reaches the lower end of the inclined portion 64, the second arm 41 moves upright to the power supply position in conjunction with the first arm 31, which is swung toward the support 21 by the moving body A1 for charging. At this time, the electrode cover 81 is being operated by the lower end of the inclined portion 64 toward the forward direction of the moving body A1 for charging the operating unit 82, so there is no interference with the electrode cover 81 when the second arm 41 moves.

[0066] Furthermore, when the moving object A1 for charging moves on the power supply device B toward the power supplying portion C, the operating portion slides the inclined portion 64 to further push down the electrode cover 81 of the moving object A1 for charging in the direction to expose it. The moving object A1 for charging pushes the first arm 31 rearward toward the support portion 21, causing the second arm 41 to rise, and the power supplying terminal member 42 contacts the moving object terminal member (power receiving portion D) to assume the power supplying position. The electrode cover 81 of the moving object A1 for charging is then rotated toward the exposed side by the protruding piece 61 and assumes the exposed position. The first arm 31 is pushed by the side portion 77 at the tip of the moving object A1 for charging and swings further toward the support portion, causing the power supplying terminal member 42 to assume the power supplying position in contact with the moving object terminal member (not shown). However, with the positional relationship between the moving object A1 for charging and the power supplying device B, power supply does not start. As the second arm 41 rises, the other end of the second arm 41 and the power supply side terminal member 42 push aside the slit 511 of the protective cover 51 and are positioned above the protective cover 51. As the movable body A1 for charging moves backward, the movable body side terminal member 85 is positioned above the power supply side terminal member 42, and they eventually come into contact with each other.

[0067] The power supply posture will be described. Furthermore, as the moving body A1 for charging moves backward and moves over the power supply device B, the power supply side terminal member 42 and the moving body terminal member (not shown) come into contact, and the moving body A1 for charging moves further backward (towards the support part 21), and the side part 77, which is the tip of the moving body A1 for charging, swings the first arm 31 to operate the switch 22. The electrode cover 81 is in an exposed state and is further rotated toward the exposed side by the protruding piece 61, and the first arm 31 is pushed by the side portion 77, which is the tip of the movable body A1 for charging, to swing and press the switch 22, and the biasing member 35 assumes an extended state. The second arm 41, which has been set in the power supply position by the biasing member 35, can swing independently of the second arm 41 even when its swing is fixed. By rotating the first arm 31 toward the support part 21, the second arm 41 is rotated upward, the power supply side terminal member 42 of the second arm 41 comes into contact with the movable body side terminal member 85, and the second arm 41 assumes the power supply posture.

[0068] When the mobile body A1 for charging is moved toward the support part 21, the operating part 82 is pressed by the lower end of the inclined part 64, causing the electrode cover 81 to rotate to the end of the rotation direction and become exposed, and at the same time, the power supply side terminal member 42 carried by the second arm 41 comes into contact with the mobile body side terminal member 85, assuming a power supply posture in which power can be supplied. When the electrode cover 81 is rotated to the end of its rotation direction, the inner surface of the rear side of the electrode cover 81 is inclined, so that the electrode cover 81 can be turned upside down, and any foreign matter inside the electrode cover 81 can be dropped downward along the inner surface. Therefore, the inside of the electrode cover 81 is cleaned every time power is supplied, and can be kept constantly clean.

[0069] The power supply-side terminal member 42 is configured to be rotatable around the terminal fulcrum 44 while receiving a rotational force from the terminal biasing body 45, which allows the contact surface 43 to come into surface contact with the movable body-side terminal member 85. In other words, even if the vertical positional relationship or the relative front-to-rear angle of the movable body-side terminal member 85 with respect to the second arm 41 shifts due to wear of the traveling part 71 of the movable body A1 used for charging (wear of the tracks shown in the embodiment or wear of the tires, etc., in the embodiment not shown), the power supply-side terminal member 42 rotates around the terminal fulcrum 44, ensuring an area where the contact surface 43 comes into contact with the movable body-side terminal member 85. The terminal biasing body 45 ensures this contact.

[0070] Furthermore, each of the pair of second arms 41 can rotate independently, and an upward force is applied to each second arm 41 by the biasing body 35, so that even if the moving body A1 for charging itself is tilted back and forth or left and right relative to the power supply device B, the pair of power supply side terminal members 42 and the pair of moving body side terminal members 85 can reliably contact each other.

[0071] Even if the power supply-side terminal member 42 comes into contact with the movable body-side terminal member 85, power supply does not yet begin. To start power supply, the first arm 31 must be further swung toward the support post 21 by the movable body A1 for charging. When the movable body A1 for charging is further moved backward toward the support post, the first arm 31 rotates toward the support post 21. Meanwhile, the second arm 41 does not rotate because the power supply-side terminal member 42 and the movable body-side terminal member 85 are in contact, and the biasing member 35 provided between the first arm 31 and the second arm 41 extends. The restricting member 33, which moves together with the first arm 31, also moves away from the second arm 41.

[0072] The power supply start operation will now be described. When first arm 31 rotates and comes into contact with support post 21, first arm 31 operates switch 22. A control unit (not shown) of power feeding device B detects that switch 22 has been operated and that power feeding-side terminal member 42 has come into contact with mobile body-side terminal member 85 (more precisely, that the positive electrodes of power feeding-side terminal member 42 and mobile body-side terminal member 85 have come into contact with the negative electrodes of power feeding-side terminal member 42 and mobile body-side terminal member 85), and after a process of checking continuity between power feeding-side terminal member 42 and mobile body-side terminal member 85, if it is determined that there are no abnormalities that would cause problems during power feeding, power is fed to battery 76, which is a power storage device on mobile body A1 for charging. The power supply device B supplies DC power to the mobile body A1 to be charged via a converter (not shown) that converts AC power into DC power and a control unit (not shown) that monitors and controls the AC power and DC power, thereby supplying power to the mobile body A1 to be charged.

[0073] The storage position from the end of power supply will be explained. When it is desired to move the mobile object A1 for charging from the power supply device B, the mobile object A1 for charging is advanced from the power supply part C toward the access road 12. To put the second arm 41 into the storage position, the steps leading up to the start of power supply described above are reversed. When the mobile object A1 for charging is advanced, the force pressing the first arm 31 toward the support part 21 is eliminated, and the first arm 31 is released from contact with the support part 21. In other words, the operation of the switch 22 by the first arm 31 is released, and at this point the control part ends the power supply operation.

[0074] As the movable body A1 moves forward further, first arm 31 rotates toward second arm 41 so as to fall under its own weight. As first arm 31 falls, first arm 31 approaches second arm 41 as if drawn by biasing member 35 until it is restricted by restricting portion 33. As movable body A1 moves forward to charge, first arm 31 is no longer supported from below, and so rotates downward together with second arm 41 under its own weight.

[0075] The second arm 41 passes through the slit 511 of the protective cover 51 on the way to the storage position, and assumes the storage position in which the power supply side terminal member 42 is located below the protective cover 51 and the shielding cover 52. The protective cover 51 and the shielding cover 52 cover the top of the power supply side terminal member 42, so even if a foreign object falls from the moving body A1 for charging moving on the placing section 11, the foreign object will not easily adhere to the power supply side terminal member 42. In addition, the slits 521 are also arranged to overlap, so that the slits 521 will not open and unintentionally form a gap, and therefore foreign object will not slip in through this gap and fall toward the power supply side terminal member 42.

[0076] Furthermore, the contact surface 43 of the power supply terminal member 42 is inclined upward and slightly horizontally, so that foreign matter on the contact surface 43 falls along the inclination. Therefore, the power supply terminal member 42 can be kept clean even after power is supplied, so that the next time it is used, there is no need to bother removing foreign matter, and power supply work can be performed with reduced power supply failures caused by foreign matter.

[0077] The transition of the electrode cover 81 from the exposed state to the closed state will be described. When it is desired to move the mobile object A1 for charging from the power supply device B, the mobile object A1 for charging is moved forward. To change the electrode cover 81 from the exposed state to the closed state, the above-described steps for changing from the closed state to the exposed state are reversed.

[0078] Because an elastic body 84 is provided at the pivot point 83 of the electrode cover 81, the electrode cover 81 automatically pivots in the direction from the exposed state toward the closed state even when the downward pressure from the inclined portion 64 is removed. As the movable body A1 for charging is moved forward, the operating portion 82 moves upward while sliding on the inclined portion 64 and the protrusion 63. When the support of the inclined portion 64 and the protrusion 63 on the operating portion 82 is removed, the electrode cover 81 enters a completely closed state. In the closed state, the electrode cover 81 protects the movable body side terminal member 85 from foreign matter such as surrounding dust, dirt, and obstacles, ensuring reliable power supply.

[0079] The mounting portion 11 is provided with a wheel portion H. The wheel unit H includes a wheel 91 , a pivot shaft 92 , a base 93 , an inverted shaft 94 which is a horizontal shaft, and a mounting portion 95 . The wheels 91 are provided on the mounting portion 11. The wheels 91 are capable of rolling while in contact with the ground. The wheels 91 can rotate in reverse around a horizontal axis, thereby switching the mounting portion 11 between a movable state and an installed state.

[0080] The wheel 91 has a pivot 92. The pivot 92 is a vertical axis facing the vertical side that allows the orientation of the wheel 91 to be changed. The pivot 92 pivots around an axis that intersects with the placement surface of the placement unit 11. The mounting portion 95 mounts the wheels 91 and also has a reversing shaft 94 . The reversing shaft 94 is a horizontal shaft and can be switched between a ground contact state in which the wheels 91 are in contact with the ground and a non-ground contact state in which the wheels 91 are inverted. The inverting shaft 94, which is a horizontal shaft, allows the power supply device B, with the wheel section H in the grounded state, to be freely movable.

[0081] The rotation shaft 92 allows the direction of the wheels 91 to be changed, thereby changing the direction of travel of the movable power supply device B. The wheel section H is made up of a swivel caster, and when the wheel section H is in the grounded state, the power supply device B can move freely in any direction, forward, backward, left, or right. Because the direction of wheels 91 can be freely changed, even if towing vehicle A towing power supply device B makes a sharp turn, including a turn on the spot, causing power supply device B to swing suddenly in the direction of the rotation axis of wheels 91, it is possible to change the direction in which wheels 91 roll by rotating wheels 91 around turning axis 92. Therefore, even if towing vehicle A performs a towing operation that involves a sharp turn, power supply device B will not fall into a state in which it is unable to follow towing vehicle A.

[0082] 1, bases 93 are provided on the outer left and right sides of the mounting portion 11, which is U-shaped in plan view. The bases 93 are members that are U-shaped in plan view, and are provided near the entrance path 12 of the mounting portion 11. As shown in Fig. 2, the mounting portion 95 is arranged so as to fit within the U-shaped interior of the base 93. An inverting shaft 94 is inserted into the base 93 and the mounting portion 95, and the mounting portion 95 is rotatable relative to the base 93 around the inverting shaft 94. By attaching the wheels 91 to the mounting portion 95, the wheels 91 can rotate up and down in an inverted manner. In this embodiment, the inverting shaft 94 faces in the same direction as the approach direction of the mobile object A1 to be charged relative to the power supply device B.

[0083] 3 and 4, fixing holes 97 are provided in two locations: one on the side of the reversing shaft 94 of the base 93, and one on both sides of the reversing shaft 94 of the mounting portion 95. By aligning the fixing hole 97 on the base 93 side with one of the fixing holes 97 on the mounting portion 95 side and inserting a fixing pin 96, the pivoting movement of the mounting portion 95 relative to the base 93 can be fixed. In other words, when the wheels 91 are turned upside down, they can be fixed in either a grounded state where the wheels 91 are in contact with the ground, or a state where the wheels 91 are turned upside down and not in contact with the ground.

[0084] As in the embodiment of the present invention, the wheel section H is configured to be inverted by the inverting shaft 94, so that a simple configuration can be achieved without adding any additional device for switching between the grounded state and the non-grounded state. Furthermore, by providing the wheel section H to the power supply device B, the installation location of the power supply device B can be freely changed, so that the installation location can be easily changed.

[0085] In the embodiment of the present invention, the pivot shaft 92 in the grounded state is fixed and maintained so as to be perpendicular to the mounting surface of the mounting portion 11, but the present invention is not limited to this example. For example, the swivel shaft 92 in the grounded state may be tilted relative to the mounting surface of the mounting unit 11 so that it approaches the towing vehicle A as it moves upward. By tilting the swivel shaft 92 in this way, even if the towing unit is lifted upward during towing and the power supply device B is in a tilted state and in a towed state, the swivel shaft 92 remains perpendicular to the ground, so no load is applied to the turning operation of the wheels 91, and the turning movement of the power supply device B is not hindered.

[0086] The reversing axis 94 does not necessarily have to be oriented in the same direction as the approach direction of the moving object A1 for charging, but may be oriented in a horizontal direction that intersects with the approach direction. Although the wheel units H have been described as being provided on the outer side near the access path 12 of the mounting unit 11, they may also be disposed on the inner side of the mounting unit 11. In this case, the wheel units H do not protrude outside the power supply device B, which allows the power supply device B to pass through narrow places when traveling, reduces the space required for traveling, and expands the range of locations where the power supply device B can be installed.

[0087] Because the base 93 is located near the access road 12, the wheel unit H is also located near the access road 12, and the towing vehicle 100 stabilizes its running when towing the power supply device B with the coupling F (described later) provided on the power supply unit C side opposite the access road 12 and the coupling F1 provided on the towing vehicle A side. Even when the mobile object A1 to be charged enters the access road 12 without being towed, with the coupling F provided on the power supply unit B side grounded, there is a sufficient distance between the wheel 91 and the power supply unit C, so the power supply device B does not seesaw, and the other end of the slope 13, which rotates around the horizontal shaft 18, can contact the installation surface. Therefore, even when the wheel 91 is in a grounded state, the mobile object A1 to be charged can easily enter the placement unit 11 of the power supply device B. It goes without saying that the mobile object A1 to be charged can also enter the placement unit 11 by flipping the wheel 91 over to place it off the ground and grounding the underside of the placement unit 11. The wheel portion H in both the grounded and non-grounded states is not located on the access path 12 or the placement surface, and therefore does not prevent the moving object A1 from entering the placement portion 11 for charging. The coupling part F on the towing vehicle A side, which is closer to the power feeding part C on the power feeding device B side, is longer and larger than the coupling part F1 of the towing vehicle A that tows the power feeding device B. Because the coupling part F is long, a sufficient distance can be maintained between the moving body A, which is the towing vehicle, and the power feeding device B when coupled to the moving body A, which is the towing vehicle. Therefore, when the power feeding device B coupled to the moving body A, which is the towing vehicle, tries to turn in response to the turning motion of the towing vehicle A, inconveniences such as interference with the towing vehicle A do not occur. The coupling part F is provided so as to be detachable from the power feeding device B, or so as to be detachable from a loading platform G, which is detachable from the power feeding device B and will be described later. Further details of the coupling part F will be described later.

[0088] G is a loading platform. The loading platform G is a member having a rectangular shape in a plan view. The loading platform G is provided adjacent to the connecting part F, which is the end closer to the mobile body A that tows the power supply device B, and near the support part 21 provided at the end of the mounting part 11. An item J can be placed on the loading platform G. The item J can also be a portable generator. The loading platform G is arranged so as to be fixable between the placement sections 11 located on both sides of the detachable section, and is provided so as to be detachably attached to the placement sections 11. The loading platform G can be provided adjacent to the connecting portion F, which is the end closer to the mobile unit A. In this case, the loading platform G is provided closer to the connecting portion F that connects the mounting portion 11. Therefore, even if a portable generator J is installed on the loading platform G, it will not obstruct the entry of the mobile unit A1 to be charged, which is entered from the access road 12 and placed on the mounting portion 11. Furthermore, since the loading platform G is provided at the end closer to the mobile unit A, which is the towing vehicle, there is no limit to the size of the object J, such as a portable generator, that can be installed on the loading platform G. This makes it easier to achieve a weight balance with the mobile unit A1 to be charged and placed on the mounting portion 11. When the power supply device B is transported by the mobile unit A, which is the towing vehicle, having the portable generator J, which is a heavy object, near the connecting portion F provides better towing balance. Reference numeral 111 denotes a first detachable part, and 112 denotes a second detachable part. The detachable part includes at least either the first detachable part 111 or the second detachable part 112, and constitutes a detachable part that detaches the connecting part F from the loading platform G or the power supply device B, or a detachable part that detaches the loading platform G from the power supply device B. 9, one end of the loading platform G is attached with the first detachable part 111, which is a detachable part, in contact with the surface of the end of the mounting part 11. Two points on the first detachable part 111, one point on a side surface of one mounting part 11, and one point on a side surface of the other mounting part 11 are fastened together with fastening members 122 made of bolts and nuts.

[0089] The first detachable portion is provided at an end of the power supply device B near the support pillar 21 on the side opposite to the access road 12. The second detachable portion 112 is provided at an end of the loading platform G opposite to the side that contacts the first detachable portion 111. The first detachable part 111 is a member formed by projecting downward from the end of the base of the support part 21 located between the one support part 11 and the other support part 11, which are the mounting surfaces. In this embodiment of the present invention, the base is made of a plate-like member 123, and is formed by bending the end downward. By attaching a connecting part F to this first detachable part 111, the power supply device B can be connected to the towing vehicle A via the connecting part F and towed by the towing vehicle A. In another embodiment, a loading platform G may be provided separately near the support part 21, and the end of this loading platform G opposite the support part 21 may be used as the end of the power supply device B, and the second detachable part 112 may be provided thereon as a detachable part. The second detachable part 112 is a member that protrudes downward from the other end of the loading platform G. In the embodiment, the end is formed by bending downward. Then, by attaching a connecting part F to this second detachable part 112, the power supply device B, which is equipped with the loading platform G, can be towed by a towing vehicle A connected to the connecting part F.

[0090] In a side view, the fastening position of the detachable part of the first detachable part 111 of the loading platform G and the fastening position of the mounting part 11 are fastened at a distance in a direction parallel to the direction in which the power-receiving moving object A1 shown in Fig. 12 enters the mounting part 11. Therefore, even if the loading platform G is positioned so as to overhang the mounting part 11 and the detachable part, it is firmly fixed without shaking. Conversely, the fixation can be released by releasing the fastening with the fastening member 122, and the loading platform G can be removed from the power supply device B.

[0091] The bottom surface of the loading platform G is spaced apart from the installation surface of the power supply device B. This allows the article J to be placed on the top surface of the loading platform G without being affected by the installation surface of the power supply device B. On the upper surface of the loading platform G, a frame 121 is provided so as to surround the upper surface of the loading platform G. The frame 121 prevents the article J placed on the upper surface of the loading platform G from shifting or moving on the upper surface of the loading platform G and falling downward. In this embodiment, the frame 121 is a U-shaped member in a plan view, and is disposed on both the left and right sides of the upper surface of the loading platform G in the direction of approach of the moving object A to be powered.

[0092] As shown in Figures 4, 8, 9, and 12, the frame body 121 is movable and can be fixed or released by an adjustment unit 124, so that the area enclosed by the frame body 121 can be freely changed. The adjustment unit 124 is a plate-like member 123 that stands upright from the top surface of the loading platform G and has a long hole 128 that is long in the horizontal direction, that is, the left-right direction relative to the direction of entry of the movable body A1, adjacent to the side of the frame body 121, and has a fastening member 126 made of a knob bolt for fixing the frame body 121 to the plate-like member 123. The frame body 121 can be adjusted to an enclosed area 127 of the frame body 121 desired by the user by selecting any position within the long hole of the adjustment unit 124 and fixing the frame body 121 with the fastening member 126, and the adjustment unit 124 can variably adjust the enclosed area 127, which is the area where the object can be placed defined by the frame body 121. That is, the frame body 121 can be moved left and right relative to the direction of entry of the mobile object A1 for charging, and can be fixed at the moved position, thereby changing the area that can be placed on the loading platform G. In this embodiment, the fastening members 126 are provided at four locations on the plate-like member 123, and each frame body 121 can be fixed to the plate-like member 123 at two locations, front and rear.

[0093] Fastening holes 125 are provided at the ends of the plate-like member 123 of the adjustment part 124. The fastening holes 125 can be used to hook or tie a string-like object such as a rope or rubber band that is stretched over or around the article J so that the article J placed on the loading platform G does not move. In this embodiment, four fastening holes 125 are provided, and each is located near the four corners of the loading platform G.

[0094] An insertion portion 101 is formed at a portion of the coupling portion F provided on the power supply device B side that is attached to or detached from the first detachable portion 111 or the second detachable portion 112. The insertion portion 101 has a U-shaped portion in a side view with an open upper side. By inserting the insertion portion 101 into the first detachable portion 111 or the second detachable portion 112 from below, the forward / backward movement of the coupling portion F relative to the first detachable portion 111 or the second detachable portion 112 is restricted. Here, "forward / backward" refers to a direction parallel to the direction of entry of the mobile object A into the access path 12, or the pulling direction of the coupling portion F provided on the power supply device B side. Since a large force is applied to the coupling portion F during towing, causing forward / backward movement, the insertion portion 101 is provided with sufficient strength. In the embodiment, the insertion portion 101 is provided with strength by widening its width in the left / right direction. By inserting a fixing member 102 consisting of a bolt and nut or a pin-shaped member into the first detachable part 111, the second detachable part 112 and the insertion part 101, the connecting part F can be prevented from moving up and down and left and right relative to the first detachable part 111 and the second detachable part 112. In the embodiment, the fixing member 102 is provided in one location on the first detachable portion 111, the second detachable portion 112, and the insertion portion 101, and fixes the connecting portion F to the detachable portion consisting of either the first detachable portion 111 or the second detachable portion 112. When the connecting portion F is used for towing, the direction in which the greatest force is applied is the front-to-back direction, and the forces moving in the up-down and left-to-right directions are very small compared to the front-to-back direction. Therefore, in the embodiment, the fixing member 102 in one location is strong enough.

[0095] The coupling part F is provided on the power feeding part C side of the power feeding device B. F1 is a coupling part provided on the towing vehicle A side. The coupling part F is detachably provided on the first detachable part 111 or the second detachable part 112 and can be connected to the coupling part F1 of the towing vehicle A. The connecting part F provided on the power supply device B side is detachably attached to the mounting part 11 on the side of the power supply device B near the support part 21 of the power supply part C. The connecting part F provided on the power supply device B side can be connected to the mobile body A which is the towing vehicle or the mobile body A1 to be charged, via the connecting part F1 provided on the towing vehicle A side, and the power supply device B can be towed and traveled. The connecting part F provided on the power supply device B side is detachably attached to the first detachable part 111 or the second detachable part 112, and can be provided on either the placement part 11 or the loading platform G.

[0096] The connecting portion F has an insertion portion 101, a connecting hole 103, a rotation restricting portion 105 which is a restricting portion, and a connecting pin . The coupling hole 103 couples the coupling portion F1 of the moving body A, which is a towing vehicle, with a coupling pin 106. The turning restricting portion 105 restricts the coupling angle between the moving body A, which is a towing vehicle, and the power supply device B being towed. The turning restriction part 105 is provided on the side away from the insertion part 101 of the connecting part F. The turning restriction part 105 is provided near the connecting hole 103. The turning restriction part 105 makes it easy to restrict the bending angle between the mobile body A and the connecting body F that occurs when the mobile body A, which is the towing vehicle, turns, and can be simply configured. Note that the bending angle in the explanation may also be referred to as the towing angle, connecting angle, tilt angle, or relative angle.

[0097] A folded portion 16 is formed in the insertion portion 101. The surface of this folded portion 16 contacts the lower surface of the upper plate member of the first detachable portion 111 and the second detachable portion 112, which are formed to protrude as much as possible, thereby supporting the connecting hole 103 side of the connecting portion F provided in the first detachable portion 111 or the second detachable portion 112 so as not to rotate up and down. Thanks to the insertion portion 101 and the folding portion 16, even though the fixing member 102 is fixed at one point, the connecting portion F can be fixed integrally to the first detachable portion 111 or the second detachable portion 112, and this is sufficient to withstand the load in the front-to-rear direction when towing. Furthermore, because the fixing member 102 is fixed at one point, it can be easily attached and detached. Because the connecting portion F can be attached and detached to the power supply device B or the cargo bed G as desired, the power supply device B can be easily configured as desired by the user.

[0098] The coupling hole 103 is aligned with the coupling hole 104 of the coupling part F1 provided on the towing vehicle, or mobile body A, in the front-to-back, left-to-right, and right-to-left positions, and coupling pin 106 is inserted to couple the power supply device B to the towing vehicle, or mobile body A. The power supply device B is able to tilt and swing freely left and right relative to the direction of travel, with the coupling pin 106 as an axis, relative to the towing vehicle, or mobile body A. Furthermore, the coupling hole 104 on the towing vehicle, or mobile body A, has a larger diameter than the coupling hole 103 of the coupling part F provided on the power supply device B side, so the power supply device B and the towing vehicle, or mobile body A, are able to tilt and swing freely relative to each other in the up and down directions. This allows the power supply device B to not only perform normal towing operations involving left and right turns, but also to follow the ground and follow the leading towing vehicle, or mobile body A, even when traveling on a surface that is uneven in the up and down direction.

[0099] The turning restriction section 105, which is a restriction section, is provided at the coupling section F. The turning restriction section 105 can restrict the towing angle relative to the towing vehicle A. When the towing vehicle, i.e., the mobile body A, and the coupling part F are coupled, the rotation control part 105, which is a control part, comes into contact with the abutment surface 107 provided on the coupling part F1 provided on the towing vehicle, i.e., the mobile body A, thereby controlling the coupling angle, which is the relative inclination angle in a plan view, between the towing vehicle, i.e., the mobile body A, and the coupling part F1. Moving body A, which is a towing vehicle, can turn both left and right with respect to the traveling direction between a straight-ahead state in which moving body A and power supply device B are arranged parallel to each other and a position where the coupling angle is restricted. Restriction unit 105 can prevent interference between power supply device B and moving body A that occurs when the relative angle between them becomes too large.

[0100] When power supply device B in the towing state is restricted in its relative angle by restricting unit 105 while turning, contact surface 107 of moving body A, which is the towing vehicle, presses restricting unit 105 in the opposite direction to the turning direction. That is, coupling unit F of power supply device B is pressed outward relative to the turning direction, causing power supply device B to swing left and right relative to the direction of travel. At this time, wheel unit H, which has wheels 91 that can swivel around a vertical axis, directs wheels 91 in the other direction of the left and right swing, so power supply device B is towed following moving body A, which is the towing vehicle, while avoiding interference with moving body A, which is the towing vehicle.

[0101] Towing may involve towing an empty power supply device B by a mobile body A using a first mobile body as a towing vehicle, or the power supply device B loaded on a mounting section 11 at a power supply position as a mobile body A1 for charging the first mobile body may be towed by a mobile body A using a second mobile body as a towing vehicle. By integrally attaching a portable generator, which is an item J, to the loading platform G attached to the power supply device B, the mobile body A, which is a towing vehicle, can supply power to the power supply device B while towing, and can also tow while supplying power to the mobile body A1 for charging, which is loaded in a power supply position.

[0102] J is a portable generator. K is a power supply control unit. The portable generator J is placed and fixed on a loading platform G which is fixed to the power supply device B. Therefore, the portable generator J is integrated with the power supply device B, and can be moved together with the power supply device B. A connection cord 131 connects the object J, which is a portable generator, to the power supply control unit K, or connects the power supply control unit K to a power take-out unit of a commercial AC power source.

[0103] The portable generator J outputs AC power to the power supply control unit K. After obtaining AC power, the power supply control unit K converts the AC power into DC power to supply DC power to the power supply side terminal member 42. The power supply control unit K acquires AC power, converts it into DC current, and then supplies power (DC power) to a mobile object A1 to be charged, which is the power-receiving side that has its power receiving unit D in contact with the power supply unit C of the power supply device B. The power supply control unit K starts the power supply operation after the mobile terminal member 85 of the power receiving unit D comes into contact with the power supply side terminal member 42 of the power supply unit C and the switch 22 provided near the power supply side terminal member 42 is operated by the mobile unit A1 to charge the device.

[0104] The power supply operation includes a continuity confirmation step of applying a test current to the battery 76, which is a power storage device of the mobile object A1 to be charged, to test the battery 76, which is a power storage device, with a current smaller than the power supply current, which is a charging current.

[0105] The power source acquired by the power supply control unit K may be an AC power source, and the power used for power supply is secured by selectively selecting either a commercial AC power source or AC power generated by a portable generator J. The commercial AC power source and AC power generated by the portable generator J described in the embodiment of the present invention are single-phase AC power sources of 100 to 240 V. The portable generator J generates electric power using power generated by an internal combustion engine. Since the power source can be selected from two systems, commercial AC power and power generated by the portable generator J, in an environment where commercial AC power can be secured, the commercial AC power can be connected to the power supply control unit K with a connection cord 131 to supply power (DC power) to the mobile body A1 to be charged. On the other hand, in an environment where commercial AC power cannot be secured, the power generated by the portable generator J can be connected to the power supply control unit K with a connection cord 131 to supply power (DC power) to the mobile body A1 to be charged.

[0106] The power supply control flow diagram shown in FIG. 13 will be described. In S1, the power supply control unit K, which has secured the AC power supply, determines whether the switch 22 is pressed. That is, after the mobile object A1 to be charged enters the portable generator J, it determines whether the mobile object A1 is located at a designated position where power can be supplied.

[0107] If it is determined in S1 that switch 22 is pressed, it is determined that the mobile object is located at the designated position, and in S2 a test current, which is a weak current compared to the charging current described below, is applied to power supply unit C. In the power supply device B of the present invention, power supply unit C is already connected to power receiving unit D of mobile object A1 to be charged when the mobile object A1 to be charged is located at the designated position. If the switch 22 is not pressed, the process returns to S1 again, and the process of detecting whether the switch 22 is pressed is repeated.

[0108] In S2, a test current is applied to the power supply unit C. In S3, the power supply control unit K determines whether the voltage detected by the application of the test current is within a preset voltage range. That is, it determines whether the voltage of the battery 76, which is a power storage device connected to the power receiving unit D connected to the power supply unit C, is within a preset voltage range.

[0109] In S3, the power supply control unit K determines whether the detected voltage is within a preset voltage range by applying the test current, and if the detected voltage of the battery 76, which is a power storage device, is within the set range, in S4 the power supply control unit K applies a charging current, which is a current capable of charging the battery 76, which is a power storage device, to the power supply unit C. The battery 76, which is a power storage device connected to the power supply unit C via the power receiving unit D, receives power and is charged.

[0110] In S3, if the power supply control unit K determines that the detected voltage of the battery 76, which is the power storage device, is not within the set range, it performs error processing and ends the processing related to power supply. In an embodiment of the present invention, examples of cases in which it is determined that the voltage of battery 76, which is a power storage device, is not within the set range include cases in which battery 76, which is a power storage device, is unable to detect a voltage within the normal range due to over-discharging or over-charging of battery 76, which is a power storage device, or poor connection between power supply unit C and power receiving unit D.

[0111] In S4, a charging current is applied to the power supply unit C, and in S5, the power supply control unit K determines whether charging of the battery 76, which is a power storage device, has progressed and whether the voltage of the battery 76, which is a power storage device, is equal to or higher than a predetermined voltage set in advance. If the voltage is below the predetermined voltage as determined in S5, the charging current continues to be applied to the power supply unit C. If the voltage is equal to or higher than the predetermined voltage, the power supply control unit K gradually reduces the charging current in S6.

[0112] After the power supply control unit K performs the process of gradually decreasing the charging current in S6, the power supply control unit K determines in S7 whether the gradually decreasing charging current has decreased to a specified value or less. If the power supply control unit K determines in S7 that the gradually decreasing charging current has fallen below a specified value, it proceeds to S8, where it determines that charging has been completed, and ends the power supply operation. On the other hand, if the power supply control unit K determines in S7 that the gradually decreasing charging current is not equal to or less than the specified value, it repeats the process of decreasing the charging current.

[0113] The above control flow is applied not only when the portable generator J is connected to the power supply control unit K, but also when the power supply control unit K acquires commercial power. [Explanation of symbols]

[0114] A Mobile A1 Mobile charging device B Power supply device F connection part 11 Placement section 42 Power supply side terminal member 85 Moving body side terminal member 91 Wheels 92 Swivel axis

Claims

1. A power supply device having a power supply side terminal member that contacts a movable body side terminal member of a movable body to supply power to the movable body, the power supply device includes a mounting portion on which the moving body can climb; a wheel provided on an outer side or an inner side of the mounting portion, which can be switched by rotating around a horizontal axis between a non-grounding state in which the mounting portion is movable and a grounding state; Equipped with The power supply device according to claim 1, wherein the wheels of the mounting unit in a grounding state and a non-grounding state where the mounting unit is movable are provided at positions that are not positioned on the mounting surface of the mounting unit.

2. The wheel has a pivot shaft that pivots around an axis that intersects with a mounting surface of the mounting portion; The power supply device according to claim 1 , further comprising:

3. a connecting portion on the mounting portion that can be connected to the moving body or another moving body; The power supply device according to claim 1 or 2, further comprising:

Images