WO2015083398A1

WO2015083398A1 - Dolly

Info

Publication number: WO2015083398A1
Application number: PCT/JP2014/070868
Authority: WO
Inventors: 祐希山下; 啓一神谷
Original assignee: トヨタ車体株式会社
Priority date: 2013-12-03
Filing date: 2014-08-07
Publication date: 2015-06-11
Also published as: JP2015107665A; CN105121252B; JP6102706B2; CN105121252A

Abstract

This dolly (10) is configured in such a manner that a load carrying section (11) is supported by at least one non-swiveling caster (15) and multiple freely swiveling casters (14). The freely swiveling casters (14) are provided at the front and rear of the load carrying section (11) in the advance direction thereof. The dolly (10) is configured in such a manner that: when the dolly (10) advances, wheel centers (146) located at wheel mounts (142) for the freely swiveling casters (14) provided at the front in the advance direction move downward to bring the points (145) of contact of wheels (141) with the traveling surface to positions below the point (155) of contact of the wheel (151) of the non-swiveling caster (15) with the traveling surface; and wheel centers (146) located at wheel mounts (142) for the freely swiveling casters (14) provided at the rear in the advance direction move upward to bring the points (145) of contact of the wheels (141) with the traveling surface to positions above the point (155) of contact of the wheel (151) of the non-swiveling caster (15) with the traveling surface.

Description

Trolley

This invention relates to the trolley | bogie in which the loading platform part is supported by the fixed caster and the universal caster.

A technology related to a conventional cart is described in Japanese Patent Application Laid-Open No. 2004-99003. As shown in FIG. 10, the conventional tow cart 100 (hereinafter referred to as “cart”) is configured to be able to travel in a curve by attaching a free caster 106 to the front side of the loading platform 103 in the traveling direction. By providing a fixed caster 107 on the side, it is configured to improve straightness. However, in the above structure, when the carriage 100 is moved back (reversed), the fixed caster 107 is positioned on the front side in the traveling direction, and there is a problem that the vehicle cannot travel in a curve. In order to improve this point, the cart described in Patent Document 1 is provided with a free caster at the center position of the loading platform, and when trying to move backward, the operator raises the rear end of the loading platform and lifts the fixed caster. By making it float, it is possible to run on a curve.

However, in the method disclosed in Japanese Patent Application Laid-Open No. 2004-99003, when an operator tries to move the carriage backward, the operator needs to lift the rear end portion of the loading platform portion to float the fixed caster, which is easy to use. There was no problem.

Therefore, an improved cart is needed.

In the first aspect of the present invention, the cargo bed portion is supported by at least one fixed caster and a plurality of free casters, and the universal caster includes a front side in a traveling direction and a rear side in the traveling direction of the cargo bed portion. When the carriage travels, the center of the wheel base of the free caster provided on the front side in the traveling direction moves downward, and the ground contact point of the wheel with respect to the traveling surface is at least the lowest It becomes lower than the grounding point of the wheel of the fixed caster having the grounding point, the wheel center of the wheel base of the free caster provided on the rear side in the traveling direction moves upward, and the grounding point of the wheel with respect to the traveling surface is at least It becomes higher than the ground contact point of the wheel of the fixed caster that has the lowest ground contact point. Rear direction side is constructed as fixed castors in contact with a running surface.

According to the first aspect of the present invention, when the carriage travels, the grounding point with respect to the traveling surface of the wheel of the free caster wheel provided on the front side in the traveling direction is lower than the grounding point of the wheel of the fixed caster, The grounding point with respect to the traveling surface of the wheel of the free caster wheel provided on the rear side in the traveling direction is higher than the grounding point of the wheel of the fixed caster. Therefore, regardless of which direction the carriage is advanced, the universal caster is always in contact with the front side in the traveling direction, and the fixed caster is in contact with the rear side in the traveling direction. As a result, the vehicle can travel in a curve both when the cart is moving forward and when the cart is moving backward, and the ease of use of the cart is improved. Therefore, even when the traveling direction of the carriage is reversed backwards and forwards, usability does not deteriorate.

In the second aspect of the present invention, the universal caster includes a rotation center shaft serving as a rotation center when the direction of the wheel mount is changed, and the upper surface of the wheel mount provided with the rotation center shaft is provided in the loading platform. The rotation center axis is passed through the inclined surface at right angles to the inclined surface that is inclined with respect to the traveling direction, and the wheel of the free caster on the front side in the traveling direction is the road surface when the carriage travels. When the wheel cradle changes its direction upon receiving the frictional force from the wheel, the wheel cradle rotates around the rotation center axis, and the posture is changed by the action of the inclined surface, so that the wheel center moves downward. . That is, since the wheel center of the universal caster rotates and changes its posture, the center of the wheel moves downward, so the structure is simple and the reliability is high. In addition, no special drive source is required, so the cost does not increase.

In the third aspect of the present invention, when the carriage advances, when the wheel of the free caster on the rear side in the traveling direction receives a frictional force from the road surface and the wheel pedestal changes its direction, The wheel center moves upward by rotating around the center of the wheel and changing the posture by the action of the inclined surface.

In the fourth aspect of the present invention, the loading platform is provided with a coupling portion for coupling a plurality of carts in the traveling direction, and the universal caster is disposed so as to sandwich the fixed caster from the front and rear in the traveling direction. ing. For this reason, when the leading carriage travels so as to curve, the following carriage is steered at the position of the end portion in the traveling direction of the loading platform. Thereby, the inner ring | wheel difference which arises at the time of curve driving | running | working between a head trolley | bogie and a subsequent trolley | bogie can be made small.

In the fifth aspect of the present invention, a plurality of fixed casters are attached in a line along the traveling direction, so that the free caster on the front side in the traveling direction and the fixed caster on the rear side in the traveling direction are grounded. It is configured. For this reason, the load applied to the loading platform can be supported in a wide area before and after the traveling direction.

In the sixth aspect of the present invention, the loading platform is provided with a sliding component configured to be slidable in the traveling direction, and the fixed caster is attached to the sliding component, and the carriage advances. In this case, the slide component is configured to slide and move rearward in the traveling direction. For this reason, in the structure in which the number of fixed casters is reduced, the load applied to the loading platform can be supported in a wide area before and after the traveling direction.

In a seventh aspect of the present invention, the platform is supported by at least one fixed caster and a plurality of universal casters, and the universal casters are respectively provided on the front side and the rear side of the platform. A rotation center axis serving as a center of rotation when the wheel base changes direction is provided on the wheel base of the universal caster, and the rotation axis of the rotation center axis of the front side free caster Is set in a state of being inclined forward and downward with respect to the loading platform, and the rotation axis of the rotation center axis of the rear free caster is inclined backward and downward with respect to the loading platform. Set to state.

It is a perspective view of the trolley | bogie which concerns on Embodiment 1 of this invention. It is a top view of the cart. It is a side view of the said trolley | bogie. It is a rear view when the said trolley is moving forward. It is a side view showing the state where the cart advances. It is a side view showing the state where the cart reverses. It is a perspective view of the trolley | bogie which concerns on Embodiment 2 of this invention. It is a side view showing the state where the cart advances. It is a side view showing the state where the cart reverses. It is a perspective view showing the conventional trolley | bogie.

[Embodiment 1]
Hereinafter, the cart 10 according to the first embodiment of the present invention will be described with reference to FIGS. The cart 10 according to the present embodiment is a so-called component cart that travels by being pulled by a towing vehicle (not shown) in a state where a plurality of components constituting an automobile or the like are placed on the loading platform 11 and connected in a traveling direction. is there. In addition, front and rear, right and left and up and down in the figure correspond to front and rear, right and left and up and down when one of the traveling directions of the carriage 10 is defined as the front and the opposite direction is defined as the rear.

<Outline of Bogie 10 in Embodiment 1>
As shown in FIGS. 1 to 3, a cart 10 according to the present embodiment includes a cargo bed portion 11 configured to be able to place a heavy object, and two sets of left and right attached to the lower surface of the cargo bed portion 11. (Four) universal casters 14 (14f, 14f and 14r, 14r) and two sets of left and right (four) fixed casters 15 (15f, 15f and 15r, 15r) are provided. The trolley | bogie 10 is comprised so that two or more units | sets can be connected in the front-back direction through the connection part 13 (in FIG. 1, the structure which connected 2 units | sets is illustrated). Among the plurality of connected

carts

10, 10, 10,..., An operation unit 12 is provided at the front end portion of the front cart 10f and the rear end portion of the last cart 10r. The operation unit 12 is configured to be connected to a tow vehicle (not shown), and the carriage 10 advances by being pulled at the position of the operation unit 12.

As shown in FIG. 2, a bracket 16 is attached to the lower surface of the loading platform 11 of the carriage 10, and a bracket fixing portion 18 that is a part for attaching the

casters

14 and 15 is attached to the lower surface of the bracket 16. It has been. Among the bracket fixing portions 18, those for attaching the universal casters 14 are provided with inclined parts 17 so as to project downward. The inclined component 17 is provided with a mounting portion 143 which is a plate-shaped component for rotatably mounting the universal caster 14. As shown in FIG. 3, the attachment portion 143 has an inclined surface 148 at its lower end surface. The front inclined component 17 is attached to the front side of the loading platform 11 so that the front side of the inclined surface 148 is higher. In addition, the rear inclined component 17 is attached to the rear side of the loading platform 11 so that the rear side of the inclined surface 148 becomes higher.

<About Swivel Caster 14>
As shown in FIGS. 1 and 2, the universal casters 14 are attached to the front end portion and the rear end portion of the loading platform 11 in a pair of left and right, respectively, and sandwich the fixed casters 15 described later from the front and rear. Is arranged. As shown in FIG. 3, the universal caster 14 includes a wheel 141 and a wheel mount 142 having a wheel center 146 that supports the wheel 141 in a rollable manner. On the upper surface 147 of the wheel mount 142, a rotation center shaft 144 </ b> A is formed to project at a right angle to the upper surface 147. The rotation center shaft 144A is passed through the inclined surface 148 of the attachment portion 143 at a right angle, so that the attachment portion 143 is in a state where the upper surface 147 of the wheel base 142 of the universal caster 14 is in surface contact with the inclined surface 148. Installed against. The mounting portion 143 is provided with an appropriate bearing structure (not shown) for the rotation center shaft 144A, and the universal caster 14 is in a state of being rotatable about the rotation axis 144 of the rotation center shaft 144A. . That is, as shown in FIG. 3, the rotation axis 144 is inclined at a predetermined angle (for example, 10 degrees) with respect to the loading platform 11. More specifically, the front universal caster 14f is provided such that the rotation axis 144 of the front universal caster 14f is inclined forward (downward in the front direction) as it goes downward from the loading platform 11. ing. On the other hand, the rear universal caster 14r is provided such that the rotational axis 144 of the rear universal caster 14r is inclined rearward (rearwardly downward) as it goes downward from the loading platform 11. . The wheel pedestal 142 of the universal caster 14 is in an eccentric state such that the wheel center 146 is positioned on the radially outer side with respect to the rotation axis 144. Therefore, when the wheel 141 of the universal caster 14 receives resistance from the traveling surface and the wheel mount 142 changes its direction, when the wheel mount 142 rotates about the rotation axis 144, the upper surface 147 of the wheel mount 142 and the attachment portion 143 are arranged. As shown by a solid line and a two-dot chain line in FIG. 3, the posture of the wheel mount 142 is changed, and the position of the wheel center 146 moves in the vertical direction. As a result, the ground contact point 145 of the wheel 141 of the universal caster 14 varies between the height position H and the height position L. The height position H is set to be higher than the height position of the ground contact point 155 of the wheel 151 of the fixed caster 15 to be described later, and the height position L is set to be lower.

<About fixed caster 15>
The fixed caster 15 is attached to the lower surface of the caster fixing portion 18 as shown in FIGS. As shown in FIG. 2, the fixed casters 15 are arranged at two positions on the left and right ends of the loading platform 11 in the front-rear direction along the traveling direction at positions outside the free casters 14 in the left-right direction. Has been. Among these, as shown in FIGS. 2 and 3, the front fixed caster 15 f is provided at a position closer to the front end portion than the center position of the load carrier portion 11, and the rear fixed caster 15 r is provided on the load carrier portion 11. It is provided at a position closer to the rear end than the center position. As shown in FIG. 3, the fixed caster 15 includes a wheel 151 and a wheel base 152 having a wheel center 156 that supports the wheel 151 so that the wheel 151 can roll, and is fixed in a non-rotatable state by a mounting portion 153. Has been.

<Operation of the universal caster 14 and the fixed caster 15>
Next, operations of the universal caster 14 and the fixed caster 15 when the cart 10 according to the present embodiment proceeds will be described. As shown in FIG. 1, when the operation unit 12 of the foremost carriage 10 f is pulled and advanced among the carriages 10 connected in the front-rear direction, the free caster 14 f on the front side of the carriage 10 moves from the traveling surface F. The frictional force (resistance) is received. Thereby, the wheel mount 142 of the universal caster 14 f changes its direction so that the wheel center 146 moves rearward with respect to the inclined component 17 of the loading platform 11. That is, the wheel base 142 of the front universal caster 14f rotates around the rotation axis 144 of the rotation center shaft 144A of the wheel base 142 and changes its posture, and as shown by the solid line in FIG. Moves downward. As a result, the ground contact point 145 with respect to the traveling surface F of the wheel 141 of the front universal caster 14f is at a height position L lower than the ground contact point 155 of the wheel 151 of the fixed caster 15, and is grounded as shown in FIG. It will be in a state.

Similarly, the wheel pedestal 142 of the rear free caster 14r receives the frictional force (resistance) from the traveling surface F and is oriented so that the wheel center 146 moves rearward with respect to the inclined component 17 of the loading platform 11. change. That is, the wheel pedestal 142 of the rear free caster 14r rotates around the rotation axis 144 of the rotation center shaft 144A of the wheel pedestal 142 and changes its posture, as shown by the solid line in FIG. 146 moves upward. As a result, the ground contact point 145 with respect to the traveling surface F of the wheel 141 of the rear universal caster 14r becomes a height position H higher than the ground contact point 155 of the wheel 151 of the fixed caster 15, and as shown in FIGS. The vehicle floats from the running surface F by an interval S1. In this way, when the front universal caster 14f is grounded and the rear universal caster 14r is floated, as shown in FIG. 5, the loading platform 11 is slightly pushed up by the front universal caster 14f and tilted backward. Then, the front fixed caster 15f floats by the interval S2, and the rear fixed caster 15r is brought into a grounded state. That is, on the front side (front) in the traveling direction, the front free caster 14f is grounded to support the loading platform 11, and on the rear side (backward) in the traveling direction, the rear fixed caster 15r is grounded to support the loading platform 11. It becomes a state. As a result, when the front truck 10f is pulled at the position of the operation unit 12 and the truck 10 is moved forward, the vehicle can travel in a curve.

When the carriage 10 is stopped, the free caster 14r on the rear side in the floating state is rotated by its own weight and is in a state of being in contact with the running surface F. From this point, when the operation unit 12 of the last carriage 10r (see FIG. 1) is pulled and moved backward, the wheels 141 of the rear free caster 14r receive frictional force (resistance) from the running surface F, and FIG. As shown by the two-dot chain line, the wheel mount 142 changes its direction so that the wheel center 146 of the wheel mount 142 moves forward with respect to the inclined component 17 of the loading platform 11. Similarly, in the free caster 14f on the front side, the wheel 141 receives the frictional force (resistance) from the running surface F, and the wheel center 146 of the wheel mount 142 is the loading part as shown by the two-dot chain line in FIG. The wheel mount 142 changes its direction so as to move forward with respect to the eleven inclined parts 17. As a result, the wheel bases 142 of the

universal casters

14f and 14r rotate around the rotation axis 144 and change their postures, so that the wheel center 146 of the universal caster 14f on the front side moves upward, and the wheels 141 run. While the ground contact point 145 with respect to the surface F is switched to the height position H, the wheel center 146 of the rear free caster 14r moves downward, and the ground contact point 145 with respect to the traveling surface F of the wheel 141 is switched to the height position L. . Then, as shown in FIG. 6, the rear universal caster 14r is in a grounded state, and the loading platform 11 is slightly pushed up, so that the rear stationary caster 15r is floated and the front stationary caster 15f is grounded. It will be in the state. That is, the rear caster 14r on the front side in the traveling direction (rear) and the front fixed caster 15f on the rear side (front) in the traveling direction are grounded to support the loading platform 11. As a result, even when the last cart 10r is pulled at the position of the operation unit 12 and the cart 10 is moved backward, the vehicle can travel in a curve.

<Advantages of the cart 10 according to the first embodiment>
In the cart 10 according to the present embodiment, when the cart 10 travels, the grounding point 145 with respect to the traveling surface F of the wheel 141 of the free caster 14 provided on the front side in the traveling direction is greater than the grounding point 155 of the wheel 151 of the fixed caster 15. The ground contact point 145 with respect to the traveling surface F of the wheel 141 of the free caster 14 provided on the rear side in the traveling direction is higher than the ground contact point 155 of the wheel 151 of the fixed caster 15 (the height position L). Height position H). For this reason, no matter which direction the carriage 10 is advanced, the universal caster 14 is always grounded on the front side in the traveling direction, and the fixed caster 15 is grounded on the rear side in the traveling direction. Can do. As a result, the vehicle can travel in a curve both when the carriage 10 moves forward and when the carriage 10 moves backward, and the usability of the carriage 10 is improved. Therefore, even when the traveling direction of the carriage 10 is reversed in the front-rear direction, the usability does not deteriorate. In addition, since the wheel center 142 of the universal caster 14 rotates and changes its posture, the wheel center 146 moves downward, so that the structure is simple and highly reliable. In addition, no special drive source is required, so the cost does not increase. Further, when the leading carriage 10 travels so as to curve, the following carriage 10 can be turned at the position of the end portion in the traveling direction of the loading platform 11. Thereby, the inner ring | wheel difference which arises at the time of curve driving | running | working between the top trolley | bogie 10 and the succeeding trolley | bogie 10 can be made small. Further, the load applied to the loading platform 11 can be supported in a wide area before and after the traveling direction.

[Embodiment 2]
Hereinafter, the cart 50 according to the second embodiment of the present invention will be described with reference to FIGS. The cart 50 according to the present embodiment is a modified structure for installing the fixed caster 15 of the cart 10 according to the first embodiment, and the other structure is the same as that of the cart 10 according to the first embodiment. . For this reason, about the same member as the trolley | bogie 10 which concerns on Embodiment 1, the same number is attached | subjected and description is abbreviate | omitted.

As shown in FIG. 7, the cart 50 according to the present embodiment is provided with a slide component 51 so as to be bridged between the left end portion and the right end portion of the loading platform portion 11. The slide component 51 is configured to be slidable in the front-rear direction by sliding with

rail portions

52 and 52 respectively attached to the left end portion and the right end portion of the lower surface of the loading platform portion 11. As shown in FIG. 7, a front end stopper portion 53f and a rear end stopper portion 53r are provided on the upper surface of the loading platform 11, so that the slide part 51 can be connected to the front free caster 14f and the rear free caster. It slides between 14r. A fixed caster 15 is attached to the lower surface of the slide part 51.

When the carriage 50 is moved forward, as shown in FIG. 8, the fixed caster 15 and the slide part 51 are held in place by the frictional force (resistance) from the running surface F, and are moved backward relative to the carriage 50. Move the slide. When the slide component 51 moves to a position closer to the rear end than the center position of the loading platform 11, the slide component 51 comes into contact with the rear end stopper 53r and is moved by the rear end stopper 53r together with the carriage 50. . At the same time, as the carriage 50 moves forward, the front free caster 14f and the rear free caster 14r are directed forward by the frictional force (resistance) from the running surface F as shown in FIG. By rotating, the front free caster 14f is grounded and the rear free caster 14r is in a floating state, similar to the cart 10 of the first embodiment described above. That is, the free caster 14f is grounded on the front side (forward) in the traveling direction, and the fixed caster 15 attached to the slide component 51 is grounded on the rear side (back) in the traveling direction.

Similarly, when the carriage 50 is moved backward, as shown in FIG. 9, the slide component 51 slides forward relative to the carriage 50, and is closer to the front end than the center position of the loading platform 11. If it moves to, it will contact | abut to the front-end stopper part 53f, and will come to move with the trolley | bogie 50. At the same time, as shown in FIG. 9, the front universal caster 14f and the rear universal caster 14r rotate so as to face rearward, the front universal caster 14f floats, and the rear universal caster 14r Ground. That is, the free caster 14r is grounded on the front side (backward) in the traveling direction, and the fixed caster 15 attached to the slide part 51 is grounded on the rear side (front) in the traveling direction. With the above configuration, in the structure in which the number of the fixed casters 15 is reduced, the load applied to the loading platform 11 can be supported in a wide area before and after the traveling direction.

[Modification]
Although the embodiments of the present invention have been described with reference to the above structure, it will be apparent to those skilled in the art that many alternations, modifications, and changes can be made without departing from the scope of the present invention. Accordingly, aspects of the invention may include all alterations, modifications, and changes that do not depart from the spirit and scope of the appended claims. For example, the form of the present invention is not limited to the special structure, and can be modified as follows.

For example, in the first and second embodiments, as the carriage 10, a connection type towing carriage that is connected in the traveling direction and advances by being pulled by the towing vehicle at the position of the operation unit 12 is illustrated. However, for example, a hand cart may be used, or a cart that is pulled without being connected may be used.

Further, the arrangement positions of the universal casters 14 and the fixed casters 15 are not limited to the arrangement positions of the first and second embodiments. For example, in the first and second embodiments, the example in which the fixed casters 15 are respectively disposed on the left side and the right side of the carriage 10 has been described. However, the fixed casters 15 are disposed at one central position in the left-right direction of the carriage 10. Structure may be sufficient. In the first embodiment, the arrangement positions of the universal caster 14 and the fixed caster 15 may be switched.

In the first and second embodiments, in order to move the wheel center 146 of the universal caster 14 in the vertical direction, the rotation shaft 144 </ b> A formed on the wheel mount 142 is attached to the inclined surface 148 so that the rotation shaft An example in which the core 144 is inclined is shown. However, for example, the structure may be such that, without tilting the universal caster 14, the position of the universal caster 14 itself is moved up and down by screw action or electrical control, and the wheel center 146 is moved in the vertical direction. Further, for example, a linear guide groove that is inclined downward toward the center portion side from the traveling direction end portion side of the loading platform portion 11 is provided to receive the frictional force (resistance) from the traveling surface F. The structure may be such that the free casters 14 are moved up and down by sliding the

free casters

14 f and 14 r rearward in the traveling direction along the guide grooves.

Claims

A carriage in which a loading platform is supported by at least one fixed caster and a plurality of free casters,
The universal casters are respectively provided on the front side in the traveling direction and the rear side in the traveling direction of the loading platform,
When the carriage travels, the wheel center of the wheel rack of the free caster provided on the front side in the traveling direction moves downward, and the wheel of the fixed caster having the lowest ground contact point with respect to the traveling surface is at least the ground contact point of the wheel. It will be lower than the ground point,
The wheel center of the wheel frame of the free caster provided on the rear side in the traveling direction moves upward so that the ground point of the wheel with respect to the traveling surface is at least higher than the ground point of the wheel of the fixed caster having the lowest ground point. Become
A cart that is configured such that, when the carriage is traveling, the free caster is in contact with the traveling surface on the front side in the traveling direction, and the fixed caster is in contact with the traveling surface on the rear side in the traveling direction.
A cart according to claim 1,
The universal caster includes a rotation center shaft serving as a rotation center when changing the direction of the wheel mount, and an upper surface of the wheel mount provided with the rotation center shaft is in a traveling direction provided in the loading platform. The rotation center axis is passed at right angles to the inclined surface in surface contact with the inclined surface that is inclined,
When the carriage travels, when the wheel of the free caster wheel on the front side in the traveling direction receives frictional force from the road surface and changes the direction of the wheel mount, the wheel mount rotates around the rotation center axis and works as an inclined surface. The cart is configured such that the center of the wheel moves downward by changing the posture.
A cart according to claim 2,
When the carriage travels, when the wheel of the free caster on the rear side in the traveling direction receives frictional force from the road surface and the wheel mount changes direction, the wheel mount rotates around the rotation center axis to A cart having a configuration in which the wheel center moves upward when the posture changes due to work.
A carriage according to any one of claims 1 to 3, wherein
The cargo bed portion is provided with a connecting portion for connecting a plurality of the carts in the traveling direction,
The universal caster is a cart arranged so as to sandwich the fixed caster from front and rear in the traveling direction.
A carriage according to any one of claims 1 to 4,
The fixed casters are attached in a state where a plurality of fixed casters are arranged along the traveling direction,
A cart configured such that a free caster on the front side in the traveling direction and a fixed caster on the rear side in the traveling direction are grounded.
A carriage according to any one of claims 1 to 4,
The cargo bed portion is provided with a slide component configured to be slidable in the traveling direction, and the fixed caster is attached to the slide component,
A cart configured to slide the slide component rearward in the traveling direction when the cart travels.
A carriage in which a loading platform is supported by at least one fixed caster and a plurality of free casters,
The universal casters are respectively provided on the front side and the rear side of the cargo bed part,
The wheel caster of the universal caster is provided with a rotation center axis that serves as a rotation center when the wheel mount changes direction,
The rotation axis of the rotation center axis of the front free caster is set in a state of being inclined forward and downward with respect to the loading platform,
A cart in which a rotation axis of the rotation center axis of the universal caster on the rear side is set in a state of being inclined rearward and downward with respect to the loading platform.