Posture correction device

Abstract

To prevent a wheel from falling when a wheel support is raised. [Solution] The posture correction device 1 includes a lifting unit 22 that raises and lowers the wheel receiving portion 10 that supports the wheel between a lowered position and an elevated position, a stopper 30 that is rotatably supported on the wheel receiving portion 10 and is positioned in a standby position when the wheel receiving portion 10 is positioned in the lowered position, and in a restricting position that restricts movement of the wheel from the wheel receiving portion 10 when the wheel receiving portion 10 is positioned in the elevated position, and a wire mechanism 50 that has a wire 52 whose one end 52a is connected to the stopper 30, and when the lifting unit 22 raises the wheel receiving portion 10 to the elevated position, the wire 52 pulls the stopper 30, causing the stopper 30 to rotate from the standby position to the restricting position.

Description

[Technical Field]

[0001] The present invention relates to an attitude correction device for correcting the attitude of a vehicle. [Background technology]

[0002] Conventionally, a device for correcting the posture of a stopped vehicle in a battery exchange system has been known. For example, Patent Document 1 discloses a device for correcting the posture of a stopped vehicle by raising a conveyor (wheel support portion) that supports the wheels of the vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-6591 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, it is possible that an external force may act on a wheel supported on a wheel cradle. If the wheel cradle is raised while a force is acting on the wheel, the wheel may move on the wheel cradle and fall off the wheel cradle.

[0005] The present invention has been made in consideration of these points, and has an object to prevent the wheels from falling when the wheel support is raised. [Means for solving the problem]

[0006] In one aspect of the present invention, there is provided an attitude correction device for correcting the attitude of a vehicle, comprising: a wheel receiving portion that supports a wheel of the vehicle; a lifting portion that raises and lowers the wheel receiving portion that supports the wheel between a lowered position and an elevated position; a stopper that is rotatably supported on the wheel receiving portion, that is positioned in a standby position when the wheel receiving portion is positioned in the lowered position, and that is positioned in a restricting position that restricts movement of the wheel from the wheel receiving portion when the wheel receiving portion is positioned in the elevated position; and a wire mechanism having one end connected to the stopper, wherein the wire pulls the stopper when the lifting portion raises the wheel receiving portion to the elevated position, thereby rotating the stopper from the standby position to the restricting position.

[0007] The device may further include a fixed base provided at a position opposite the lifting section and to which the other end of the wire is connected, and the wire mechanism rotates the stopper to the regulating position where the stopper contacts the upper surface of the fixed base, and when the wheel receiving section moves from the raised position to the lowered position, the stopper receives a reaction force from the upper surface and rotates from the regulating position to the standby position.

[0008] The wire mechanism may further include a fixed base provided at a position opposite the lifting section and to which the other end of the wire is connected, and the wire mechanism may further include a holding section that holds the other end of the wire, which rises in conjunction with the rise of the wheel receiving section to the raised position, at a holding position, and while the other end of the wire is held at the holding position, the one end pulls the stopper.

[0009] The holding portion may be a spring member that is connected to the other end of the wire and pulls the other end downward.

[0010] The wire may be provided along the vertical direction, and the holding portion may be a weight connected to the other end of the wire that is positioned vertically below the one end.

[0011] The wire mechanism may further include a guide portion that guides the other end portion to rise to the holding position when the wheel receiving portion moves to the raised position.

[0012] Furthermore, the stopper may be rotated from the standby position to the regulating position by pulling the stopper while the wire is bent, and the wire mechanism may further have a support portion that is provided on the fixed base and is in contact with the bending wire.

[0013] In addition, the wire mechanism may have a connecting portion that connects one end of the wire to the stopper so that it can rotate freely, and when the wire bends as the stopper rotates from the standby position to the regulating position, the one end may rotate relative to the stopper via the connecting portion.

[0014] In addition, the stopper may be a plate member, and when the stopper is located in the standby position, the stopper may be positioned so that the upper surface of the stopper and the upper surface of the wheel receiving portion are flush with each other and overlap with a portion of the upper surface of the wheel receiving portion.

[0015] The vehicle may be a truck, and the wheel bearing portion may support a front wheel of the truck. [Effects of the Invention]

[0016] According to the present invention, it is possible to prevent the wheels from falling when the wheel support is raised. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a schematic diagram showing the configuration of a battery exchange system S in which a posture correction device 1 is installed. [Figure 2] 10 is a schematic diagram showing a state in which the posture correction device 1 has raised the wheel 110 to a raised position. [Figure 3]1 is a perspective view showing the attitude correction device 1 when the wheel receiving portion 10 is in a lowered position. FIG. [Figure 4] 1 is a perspective view showing the attitude correction device 1 when the wheel receiving portion 10 is in a raised position. [Figure 5] FIG. 2 is a schematic diagram showing a wire mechanism 50. [Figure 6] 10 is a schematic diagram showing the state of the wire mechanism 50 when the stopper 30 is located at the standby position. FIG. [Figure 7] 10 is a schematic diagram showing the state of the wire mechanism 50 when the stopper 30 is located at the restricting position. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] <Outline of posture correction device> An attitude correction device according to one embodiment is a device that corrects the attitude of a parked vehicle. The vehicle attitude may be, for example, a yaw angle, a roll angle, or a pitch angle. Here, the attitude correction device is installed in a battery exchange system that automatically replaces batteries mounted on a vehicle. However, the present invention is not limited to this, and the attitude correction device may also be installed in a system that performs vehicle maintenance.

[0019] Fig. 1 is a schematic diagram showing the configuration of a battery exchange system S in which a posture correction device 1 is installed. Fig. 2 is a schematic diagram showing a state in which the posture correction device 1 has raised the wheels 110 to the raised position. For ease of explanation, Fig. 1 shows only a part of the battery exchange system S, and does not include an exchange device that automatically replaces the battery.

[0020] The battery exchange system S includes an attitude correction device 1 and a fixed base 5. The attitude correction device 1 is provided at a position corresponding to each wheel at the stopping position of the vehicle 100. Although only the attitude correction device 1 corresponding to the right front wheel of the vehicle 100 is shown in FIG. 1, in reality, a plurality of attitude correction devices 1 are provided.

[0021] The fixed base 5 is a base that is fixed on the path along which the vehicle 100 moves. The fixed base 5 forms a path along which the wheels 110 of the vehicle 100 pass. The fixed bases 5 are arranged in front of and behind the attitude correction device 1.

[0022] The attitude correction device 1 corrects the attitude of the vehicle before the battery is replaced. That is, the attitude correction device 1 corrects the attitude of the stopped vehicle 100 to make it easier for the battery replacement device to replace the battery. For example, the attitude correction device 1 corrects the attitude of the stopped vehicle 100 by moving the wheels 110 of the stopped vehicle 100 in the vehicle width direction and the up-down direction.

[0023] The posture correction device 1 has a wheel receiving portion 10 that supports a wheel 110. For example, in order to replace the battery, the posture correction device 1 raises the wheel receiving portion 10 that supports the wheel 110, as shown in FIG. 2. At this time, if an external force acts on the wheel supported by the wheel receiving portion 10, the wheel may move on the wheel receiving portion 10.

[0024] In contrast, the posture correction device 1 of this embodiment, as will be described in detail later, has a stopper 30 that restricts the movement of the wheel when the wheel receiving portion 10 is raised. Here, the stopper 30 restricts the rearward movement of the wheel, thereby maintaining the wheel 110 positioned on the wheel receiving portion 10. In particular, the stopper 30 rotates in conjunction with the movement of the wheel receiving portion 10 and is positioned at the restricting position (the position shown in FIG. 2), thereby preventing the wheel 110 from falling off the wheel receiving portion 10 while the wheel receiving portion 10 is raised.

[0025] <Detailed configuration of posture correction device> The detailed configuration of the posture correction device 1 will be described with reference to FIGS. FIG. 3 is a perspective view showing the attitude correction device 1 when the wheel receiving portion 10 is in the lowered position. FIG. 4 is a perspective view showing the attitude correction device 1 when the wheel receiving portion 10 is in the raised position. FIG. 5 is a schematic view showing the wire mechanism 50. FIG. 6 is a schematic view showing the state of the wire mechanism 50 when the stopper 30 is in the standby position. FIG. 7 is a schematic view showing the state of the wire mechanism 50 when the stopper 30 is in the restricting position. Note that in FIG. 4, the stopper 30 is made transparent for ease of explanation.

[0026] As described above, the posture correction device 1 is provided at a position corresponding to each wheel 110 of the vehicle 100, and the configuration of each posture correction device 1 is the same. Therefore, the following describes the configuration of the posture correction device 1 provided at a position corresponding to the front wheel 110 of the vehicle 100 (here, the right front wheel).

[0027] Here, the vehicle 100 is assumed to be a truck. When the vehicle 100 is a truck, the vehicle height at the front of the vehicle 100 is likely to be low, and so the wheel receiving portion 10 of the wheel 110 on the front side of the vehicle 100 is often raised. This more effectively achieves the effect of preventing the wheel 110 from falling off the wheel receiving portion 10 by providing the stopper 30.

[0028] As shown in FIG. 3, the posture correction device 1 includes a wheel receiving portion 10, a conveyor portion 15, a lifting mechanism 20, a stopper 30, and a wire mechanism 50.

[0029] The wheel receiving portion 10 supports one wheel 110 of the vehicle 100 that is positioned at a stop position. In this example, the wheel receiving portion 10 supports the right front wheel 110 of a truck. The length of the wheel receiving portion 10 in the front-rear direction is smaller than the diameter of the wheel 110. In this case, the wheel receiving portion 10 can be made smaller, but the risk of the wheel 110 falling off the wheel receiving portion 10 increases. However, by providing the stopper 30, the effect of preventing the wheel 110 from falling off the wheel receiving portion 10 while the wheel receiving portion 10 is being raised can be more effectively achieved. The wheel receiving portion 10 moves up and down between a lowered position shown in FIG. 3 and an elevated position shown in FIG. 4. When the wheel 110 of the vehicle 100 moves on the fixed base 5 (FIG. 1), the wheel receiving portion 10 is located at the lowered position. When correcting the posture of the wheel 110, the wheel receiving portion 10 moves from the lowered position to the elevated position.

[0030] The conveyor unit 15 is provided on the upper surface of the wheel receiving unit 10 and has the function of moving the wheel 110 supported by the wheel receiving unit 10 in the vehicle width direction. The conveyor unit 15 has a plurality of rollers 17 provided at predetermined intervals in the vehicle width direction. The wheel 110 is in contact with some of the rollers 17. The wheel 110 can be moved in the vehicle width direction by the rotation of the roller 17 with which the wheel 110 is in contact. The wheel receiving unit 10 moves up and down between a lowered position and an raised position while the wheel 110 is in contact with the roller 17.

[0031] The lifting mechanism 20 is a mechanism for moving the wheel receiving portion 10 up and down. The lifting mechanism 20 raises and lowers the wheel receiving portion 10, which supports the wheel 110, between a lowered position and an elevated position. The lifting mechanism 20 has a motor as a drive source, and moves the wheel receiving portion 10 up and down using the power of the motor. As shown in FIG. 3 , the lifting mechanism 20 has a lifting portion 22, a link member 24, and a wheel portion 26.

[0032] The lifting / lowering section 22 is integrated with the wheel receiving section 10 (in other words, the lifting / lowering section 22 forms part of the wheel receiving section 10) and raises and lowers the wheel receiving section 10. The lifting / lowering section 22 is provided at a position facing the fixed base 5. Specifically, the lifting / lowering section 22 is located on the side of the wheel receiving section 10 (the surface facing the fixed base 5). The lifting / lowering section 22 is provided with a plurality of rotation support sections 28.

[0033] The rotation support portion 28 rotatably supports the stopper 30. The rotation support portion 28 supports the underside of the stopper 30. A plurality of rotation support portions 28 are provided at predetermined intervals in the longitudinal direction of the lifting / lowering portion 22. Therefore, the rotation support portion 28 supports the stopper 30 rotatably relative to the lifting / lowering portion 22.

[0034] The link member 24 connects the lifting / lowering unit 22 and the wheel unit 26. One longitudinal end of the link member 24 is connected to the lifting / lowering unit 22, and the other longitudinal end of the link member 24 is connected to the wheel unit 26. When the link member 24 rotates, the lifting / lowering unit 22 moves up and down.

[0035] The wheel unit 26 rolls on a guide unit 27 that is provided parallel to the vehicle width direction. For example, the wheel unit 26 rolls on the guide unit 27 upon receiving power from a motor that moves the lifting unit 22 up and down. The guide unit 27 is formed in a rod shape. When the wheel unit 26 rolls, the link member 24 rotates. When the wheel unit 26 rolls toward either end of the guide unit 27 in the longitudinal direction (see FIG. 4), the link member 24 rotates to raise the lifting unit 22. On the other hand, when the wheel unit 26 rolls toward the center of the guide unit 27 in the longitudinal direction (see FIG. 3), the link member 24 rotates to lower the lifting unit 22.

[0036] The stopper 30 restricts the movement of the wheel 110 from the wheel receiving portion 10. The stopper 30 is a plate member. The stopper 30 is provided so that its longitudinal direction is parallel to the vehicle width direction. The stopper 30 restricts the wheel 110 from falling off the wheel receiving portion 10 when the wheel receiving portion 10 is in the raised position. Here, the stopper 30 is located behind the wheel 110 in the fore-and-aft direction of the vehicle 100 (see FIG. 2), and restricts the wheel 110 from falling rearward from the wheel receiving portion 10.

[0037] The stopper 30 is provided so that its position can be changed. When the wheel receiving portion 10 is in the raised position as shown in Fig. 4, the stopper 30 is in a restricting position where it restricts movement of the wheel 110 from the wheel receiving portion 10. On the other hand, when the wheel receiving portion 10 is in the lowered position as shown in Fig. 3, the stopper 30 is in a standby position. When in the standby position, the stopper 30 does not restrict movement of the wheel 110.

[0038] The stopper 30 moves between a standby position and a restricting position. The stopper 30 is rotatably supported by the wheel receiving portion 10, and rotates between the standby position and the restricting position in conjunction with the movement of the wheel receiving portion 10. For example, when the wheel receiving portion 10 moves from the lowered position to the raised position, the stopper 30 located in the standby position moves toward the restricting position. In this way, the position of the stopper 30 changes in accordance with the movement of the wheel receiving portion 10.

[0039] When the stopper 30 is in the restricted position, it is positioned so as to intersect with the lifting direction (vertical direction). Specifically, the stopper 30 in the restricted position is inclined with respect to the lifting direction. More specifically, the angle formed between the stopper 30 in the restricted position and the upper surface of the wheel receiving portion 10 is smaller than 90 degrees (see FIG. 7). In this case, even if the force acting on the plate-shaped stopper 30 from the wheel 110 increases, the stopper 30 does not deform and can more easily support the wheel 110 appropriately.

[0040] When the stopper 30 is located in the restricted position, it is in contact with the upper surface 6 of the fixed base 5 (see FIG. 7). This restricts the rotation of the stopper 30, so that the stopper 30 can be held in the restricted position. Furthermore, because the stopper 30 is in contact with the upper surface 6 of the fixed base 5, a reaction force acts on the stopper 30 from the upper surface 6. Therefore, when the wheel receiving portion 10 moves from the raised position to the lowered position, the stopper 30 receives the reaction force from the upper surface 6 of the fixed base 5 and rotates from the restricted position to the standby position. This makes it easier to rotate the wheel receiving portion 10 from the restricted position to the standby position by lowering the wheel receiving portion 10 to the lowered position.

[0041] When the stopper 30 is located at the standby position, it covers the gap between the wheel receiving portion 10 and the fixed base 5 (see FIG. 6). Specifically, when the stopper 30 is located at the standby position, the upper surface of the stopper 30 is flush with the upper surface of the wheel receiving portion 10. The upper surface of the stopper 30 may be located higher than the upper surface of the wheel receiving portion 10 by the thickness of the stopper 30. In this case, the stopper 30 overlaps a part of the upper surface of the wheel receiving portion 10. As a result, the wheel 110 passes over the stopper 30 located at the standby position and is located on the wheel receiving portion 10. Without the stopper 30, there is a risk that the wheel 110 will be subjected to an impact when passing through the gap between the fixed base 5 and the wheel receiving portion 10. However, the stopper 30 covers the gap, allowing the wheel 110 to move smoothly.

[0042] The wire mechanism 50 is a mechanism for rotating the stopper 30 when the wheel receiving portion 10 is raised or lowered. The wire mechanism 50 has a wire 52 having one end 52a connected to the stopper 30. When the lifting unit 22 raises the wheel receiving portion 10 to the raised position, the wire 52 pulls the stopper 30, thereby rotating the stopper 30 from the standby position to the restricted position. As shown in FIG. 3 , the wire mechanism 50 is provided on one end side of the stopper 30 in the longitudinal direction. However, this is not limited thereto, and the wire mechanism 50 may also be provided on the other end side of the stopper 30 in the longitudinal direction. Furthermore, the wire mechanism 50 may be provided in the center of the stopper 30 in the longitudinal direction.

[0043] The detailed configuration of the wire mechanism 50 will be described with reference to Figures 5 to 7. As shown in Figure 5, the wire mechanism 50 has a wire 52, a slider 54, a holding portion 56, a guide portion 58, a support portion 60, and a connecting portion 62.

[0044] The wire 52 is made of metal in this example and is provided to connect the stopper 30 and the fixed base 5. Specifically, one end 52a of the wire 52 is connected to the stopper 30, and the other end 52b of the wire 52 is connected to the fixed base 5 (specifically, the holding portion 56). The wire 52 is provided along the vertical direction. The wire 52 can move up and down along the guide portion 58 when the wheel receiving portion 10 moves up and down.

[0045] When the wheel receiving portion 10 moves from the lowered position to the raised position, the wire 52 pulls the stopper 30. Specifically, as shown in Fig. 7, the wire 52 pulls the stopper 30 while bending, causing the stopper 30 to rotate from the standby position to the restricted position.

[0046] The slider 54 is connected to the other end 52b of the wire 52. The slider 54 is movable along the guide portion 58. As the slider 54 moves, the position of the other end 52b of the wire 52 also moves. The other end 52b is located at a first position shown in FIG. 6 when the wheel receiving portion 10 is located at the lowered position, and is located at a second position shown in FIG. 7 when the wheel receiving portion 10 is located at the raised position.

[0047] The holding portion 56 is connected to the other end 52b of the wire 52 via the slider 54. The holding portion 56 holds the other end 52b of the wire 52, which rises in conjunction with the rise of the wheel receiving portion 10 to the raised position, at a holding position. Specifically, the holding portion 56 holds the other end 52b at the holding position while the wheel receiving portion 10 is rising to the raised position. The holding portion 56 then holds the other end 52b at the holding position while the wheel receiving portion 10 is further rising to the raised position. The holding portion 56 also holds the other end 52b at the holding position when the wheel receiving portion 10 is positioned at the raised position. In other words, the holding position of the other end 52b is the second position. Therefore, with the other end 52b held at the holding position, the one end 52a of the wire 52 pulls the stopper 30, causing the stopper 30 to rotate to the restricted position.

[0048] Here, the holding portion 56 is a spring member that pulls the other end 52b downward via the slider 54. Specifically, the spring member is a tension spring. The holding portion 56 holds the other end 52b in the holding position by the elastic force of the tension spring. One end of the spring member is connected to the pillar portion 54a of the slider 54, and the other end of the spring member is connected to the pillar portion 57a ​​of the fixing portion 57. The slider 54 is pulled by the elastic force of the contracting spring member. The slider 54 rises against the elastic force.

[0049] The guide portion 58 is provided on the fixed base 5 as shown in FIG. 6. The guide portion 58 is provided parallel to the vertical direction and guides the vertical movement of the slider 54. The guide portion 58 has a recess 58a along the vertical direction, and the slider 54 moves within the recess 58a. For example, the guide portion 58 guides the ascent of the other end portion 52b from the first position to the second position (holding position) when the wheel receiving portion 10 moves to the raised position. Similarly, the guide portion 58 guides the descent of the other end portion 52b from the second position to the first position when the wheel receiving portion 10 moves to the lowered position.

[0050] As shown in Fig. 6, the support part 60 is provided above the guide part 58 on the fixed base 5 so as to be in contact with the wire 52. In this case, the support part 60 is a shaft, and the wire 52 is in contact with the outer circumferential surface of the shaft. For example, the support part 60 comes into contact with the curved wire 52 when the other end part 52b of the wire 52 is positioned at the holding position. This allows the support part 60 to keep the wire 52 in a taut state, making it easier for the wire 52 to pull the stopper 30, and allowing the stopper 30 to rotate smoothly.

[0051] The connecting portion 62 rotatably connects one end 52a of the wire 52 to the stopper 30. The connecting portion 62 is fixed to the one end 52a. The connecting portion 62 is rotatably connected to, for example, the connecting portion 32 provided on the underside of the stopper 30. Therefore, the connecting portion 62 and the one end 52a can rotate when the stopper 30 rotates. As a result, when the wire 52 bends as the stopper 30 rotates, the one end 52a of the wire 52 rotates relative to the stopper 30 via the connecting portion 62, thereby suppressing twisting of the one end 52a. As a result, the wire 52 is maintained in a taut state during the rotation of the stopper 30, making it easier for the one end 52a to pull the stopper 30 appropriately.

[0052] <Modification> In the above description, the holding portion 56 is a spring member, but is not limited to this. For example, the holding portion 56 may be a weight connected to the other end 52b of the wire 52, which is positioned vertically below the one end 52a. In this case, the weight pulls the other end 52b downward, so that the other end 52b of the wire 52 can be held in the holding position with a simple configuration.

[0053] In the above description, the stopper 30 restricts the rearward movement of the wheel 110 on the wheel receiving portion 10, but this is not limiting. For example, the stopper 30 may be provided at a position where it restricts the forward movement of the wheel 110 on the wheel receiving portion 10.

[0054] In the above description, the attitude correction device 1 provided at a position corresponding to the front wheels of the vehicle 100 has the stopper 30, but this is not limiting. For example, the attitude correction device 1 provided at a position corresponding to the rear wheels of the vehicle 100 may have the stopper 30. Furthermore, all of the attitude correction devices 1 provided at positions corresponding to the wheels of the vehicle 100 may have the stopper 30.

[0055] <Effects of this embodiment> The posture correction device 1 of the above-described embodiment includes an elevator 22 that raises and lowers the wheel receiving portion 10 that supports the wheel 110, and a stopper 30 that is supported on the wheel receiving portion 10 and is rotatable between a standby position and a restricting position that restricts movement of the wheel 110 from the wheel receiving portion 10. The posture correction device 1 also includes a wire mechanism 50 that has a wire 52 connected at one end to the stopper 30, and when the elevator 22 raises the wheel receiving portion 10 to the elevated position, the wire 52 pulls the stopper 30, thereby rotating the stopper 30 from the standby position to the restricting position. As a result, when the wheel receiving portion 10 moves to the raised position, the wire 52 of the wire mechanism 50 pulls the stopper 30, causing the stopper 30 to rotate to the restricted position. Therefore, if the wheel 110 receives an external force and tries to move when the wheel receiving portion 10 is raised, the wheel 110 comes into contact with the stopper 30, thereby preventing the wheel 110 from falling off the wheel receiving portion 10.

[0056] The present invention has been described above using embodiments, but the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and changes are possible within the scope of the gist of the present invention. For example, all or part of the device can be configured by functionally or physically distributing or integrating any unit. Furthermore, new embodiments resulting from any combination of multiple embodiments are also included in the embodiments of the present invention. The effects of the new embodiments resulting from the combination also have the effects of the original embodiments. [Explanation of symbols]

[0057] 1 Posture correction device 5 Fixed base 10 Wheel support 22 Lifting section 30 Stopper 50 Wire mechanism 52 Wire 52a One end 52b Other end 56 Holding part 58 Guide section 60 Support part 62 Connecting part 100 vehicles 110 wheels

Claims

1. An attitude correction device for correcting the attitude of a vehicle, a wheel receiving portion for supporting a wheel of the vehicle; an elevator unit that raises and lowers the wheel receiving unit that supports the wheel between a lowered position and an elevated position; a stopper that is rotatably supported by the wheel receiving portion, that is positioned at a standby position when the wheel receiving portion is positioned at the lowered position, and that is positioned at a restricting position that restricts movement of the wheel from the wheel receiving portion when the wheel receiving portion is positioned at the raised position; a wire mechanism having one end connected to the stopper, wherein the wire pulls the stopper when the lifting unit lifts the wheel receiving unit to the raised position, thereby rotating the stopper from the standby position to the restricting position; A posture correction device comprising:

2. a fixed base provided at a position opposite the lifting unit and to which the other end of the wire is connected, the wire mechanism rotates the stopper to the restricted position where the stopper contacts the upper surface of the fixed base; When the wheel receiving portion moves from the raised position to the lowered position, the stopper receives a reaction force from the upper surface and rotates from the restricting position to the standby position. The posture correction device according to claim 1 .

3. a fixed base provided at a position opposite the lifting unit and to which the other end of the wire is connected, the wire mechanism further includes a holding portion that holds the other end of the wire at a holding position, the other end of the wire rising in conjunction with the wheel receiving portion rising to the raised position; The one end of the wire pulls the stopper while the other end of the wire is held at the holding position. The posture correction device according to claim 1 .

4. The holding portion is a spring member that is connected to the other end of the wire and pulls the other end downward. The posture correction device according to claim 3 .

5. The wire is provided along a vertical direction, the holding portion is a weight connected to the other end portion of the wire located vertically below the one end portion of the wire; The posture correction device according to claim 3 .

6. The wire mechanism further includes a guide portion that guides the other end portion of the wheel receiving portion to ascend to the holding position when the wheel receiving portion moves to the ascending position. The posture correction device according to claim 3 .

7. The wire pulls the stopper while bending, causing the stopper to rotate from the standby position to the restricting position, The wire mechanism further includes a support portion provided on the fixed base and in contact with the curved wire. The posture correction device according to claim 3 .

8. the wire mechanism has a connecting portion that rotatably connects the one end of the wire to the stopper, When the wire is bent in accordance with the rotation of the stopper from the standby position to the regulating position, the one end portion rotates relative to the stopper via the connecting portion. The posture correction device according to claim 6 .

9. the stopper is a plate member, When the stopper is located at the standby position, the stopper is positioned so that an upper surface of the stopper and an upper surface of the wheel receiving portion are flush with each other and overlap with a part of the upper surface of the wheel receiving portion. The posture correction device according to claim 1 .

10. the vehicle is a truck, The wheel receiving portion supports the front wheels of the truck. The posture correction device according to claim 1 .

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