JP6032172B2 - Dolly caster positioning mechanism - Google Patents

Description

  The present invention relates to a caster positioning mechanism provided in a carriage such as a stretcher mounted in a vehicle interior of a vehicle.

A technique related to a conventional caster positioning mechanism is described in Patent Document 1.
The caster positioning mechanism 500 of Patent Document 1 includes a pair of wheel stop arm portions 501 and 501 as shown in FIG. After moving the cart 20 (see FIG. 2) to an arbitrary stop position, the caster positioning mechanism 500 is mounted from the side surface direction of the caster 24 of the cart 20, so that the wheel stop arm portions 501 and 501 are mounted on the wheels of the caster 24. The wheel 25 is prohibited from rolling by being inserted between the wheel 25 and the floor surface. Thereby, the caster 24 can be fixed in a state in which the moving direction of the carriage 20 faces.
When the caster positioning mechanism 500 is removed and the carriage 20 is moved in the direction opposite to the direction of the caster 24 (on the straight line Rt in the right direction in the drawing), the caster 24 of the carriage 20 is, for example, as shown by a one-dot chain line in FIG. Then, it rotates horizontally around the horizontal rotation axis R in the clockwise direction or counterclockwise (not shown), and finally turns to the opposite direction as shown by the two-dot chain line.

JP 2004-182176 A

When the cart 20 is moved in the opposite direction of the caster 24, it is a subtle force when the cart 20 is moved whether the caster 24 rotates horizontally in the clockwise direction or the counterclockwise direction. Since various factors such as adjustment and floor condition are involved, it cannot be predicted in a normal use state.
For this reason, when the cart 20 is used in a vehicle interior where space is limited, depending on the direction in which the caster 24 rotates horizontally, it may interfere with surrounding members during the horizontal rotation operation. For example, if the caster 24 of the carriage 20 rotates horizontally in the counterclockwise direction when the carriage 20 moves from the retracted position in the passenger compartment to the rear of the vehicle, as shown in FIG. , It may interfere with the column 13 (a part of the load in the passenger compartment). In such a case, the caster 24 can no longer rotate horizontally, and it may be difficult to pull out the carriage 20 from the storage position.

  The present invention has been made to solve the above-described problems, and the technical problem of the present invention is to prevent the caster of the carriage from interfering with surrounding members when the carriage is pulled out from the storage position in the passenger compartment. Thus, the cart can be easily pulled out.

The above problems are solved by the following invention.
The invention according to claim 1 is a caster positioning mechanism for positioning a caster of the cart at the retracted position, which is provided at a retracted position of the cart in the vehicle interior, and when the cart moves to the retracted position. Further, the direction of the caster facing the moving direction of the carriage is configured to be directed to a predetermined direction intersecting the moving direction of the carriage, and the caster faces the predetermined direction, When the cart moves in a direction away from the storage position, the caster is configured to rotate horizontally only in a predetermined direction.

  According to the present invention, when the carriage is pulled out from the storage position, the caster rotates horizontally only in a predetermined direction from a state in which the caster faces a predetermined direction. That is, by setting the rotation direction of the caster so as not to interfere with the peripheral members (obstacles) around the storage position, the cart can be pulled out of the storage position so as not to interfere with the peripheral members (obstacles).

According to the second aspect of the present invention, the guide portion is provided so as to intersect the moving direction of the carriage in a plan view, and the guide portion is caster when the carriage moves to the storage position. The caster is directed in a predetermined direction by abutting the caster at a position rearward in the movement direction of the carriage with respect to the horizontal rotation axis of the carriage and guiding the caster so as to face the guide portion. It is comprised as follows.
Here, the caster of the carriage is guided so as to face the guide portion arranged so as to intersect with the moving direction of the carriage in plan view. For this reason, by matching the direction facing the guide portion with the predetermined direction, the caster can be automatically oriented in the predetermined direction when the carriage moves to the storage position. That is, a dedicated operation for directing the caster in a predetermined direction is not necessary, and usability is improved.

According to a third aspect of the present invention, the guide portion is configured to be gently raised with respect to the floor surface in the vehicle interior.
That is, the guide part has a structure without a steep step. For this reason, for example, when an occupant in the vehicle interior moves, the vehicle does not trip on the guide portion.

  According to a fourth aspect of the present invention, there is provided a cart positioning mechanism in the vehicle, the cart caster positioning mechanism according to any one of the first to third aspects, and a cart positioning mechanism that extends along a moving direction of the cart. And a carriage holder that guides the movement direction of the carriage linearly when the carriage moves to the retracted position.

  According to the present invention, when the carriage is pulled out from the storage position in the vehicle compartment, the carriage can be easily pulled out so that the caster of the carriage does not interfere with the surrounding members.

It is a model top view of a vehicle provided with the caster positioning mechanism of the trolley | bogie which concerns on Embodiment 1 of this invention. It is a side view of a trolley. It is a side perspective view showing the caster positioning mechanism of the trolley | bogie which concerns on the said embodiment. It is a side surface schematic diagram showing the state which the caster positioning mechanism of the trolley | bogie and the caster of a trolley | bogie which concern on the said embodiment contact | abutted. It is a model top view showing a mode that the caster of a trolley concerning the above-mentioned embodiment will be in the state where the caster of the trolley turned to the direction slanted the predetermined angle with respect to the moving direction of a trolley. It is a perspective view showing a mode that the caster of a trolley | bogie which has faced the direction diagonally inclined with respect to the moving direction of a trolley by the caster positioning mechanism of the trolley | bogie which concerns on the said embodiment. In the said embodiment, it is a schematic top view showing a mode that the caster which turned to the state diagonally inclined by the predetermined angle with respect to the moving direction of a trolley turns to the state which turned to the back with the backward movement of a trolley | bogie. is there. It is a side perspective view showing the caster positioning mechanism of the trolley | bogie which concerns on the modification of this invention. It is a model top view showing a mode that the caster of a trolley | bogie which faced the direction diagonally inclined with respect to the moving direction of a trolley | bogie with the caster positioning mechanism of the trolley | bogie which concerns on Embodiment 2 of this invention. In the said embodiment, it is a schematic top view showing a mode that the caster which turned to the state diagonally inclined by the predetermined angle with respect to the moving direction of a trolley turns to the state which turned to the back with the backward movement of a trolley | bogie. is there. It is a model top view showing a mode that the caster of the trolley | bogie using the conventional caster positioning mechanism rotates horizontally from the state which faced the front direction. It is a schematic top view showing a mode that the caster of the trolley horizontally rotated counterclockwise when the conventional caster positioning mechanism is used in the vehicle interior.

[Embodiment 1]
Hereinafter, based on FIGS. 1-7, the caster positioning mechanism of the trolley | bogie which concerns on Embodiment 1 of this invention is demonstrated.
In addition, front and rear, right and left and up and down in the figure correspond to front and rear, left and right and up and down of the vehicle.
5 and 7, in order to make the operation of the wheel 25 of the caster 24, which will be described later, easy to understand, the caster 24 is represented by the schematic diagram of the Z-line cross section shown in FIG. The ground S (the lower end portion of the wheel 25) is illustrated. 5 and 7, in order to show the moving direction of the carriage 20, the moving direction of the horizontal rotation axis R is expressed by a straight line Rt.
5 and 7, the structure of the stretcher holder 14 (the first hook 141 and the holder main body 145) is omitted for the sake of convenience in order to make the drawings easier to see.

<About the outline of the vehicle 10>
Before describing this embodiment, first, an outline of the vehicle 10 and the carriage 20 will be described.
As shown in FIG. 1, the vehicle 10 includes a back door 11, and a stretcher 20 (hereinafter referred to as a carriage 20) is stored in the vehicle compartment through an opening that is opened and closed by the back door 11. Can move up to. Further, the carriage 20 can be lowered from the opening by moving in the vehicle rearward direction (the direction away from the storage position) from the storage position.
A vehicle positioning mechanism 15 for positioning the vehicle 20 in the vehicle interior is provided in the vehicle interior of the vehicle 10. The carriage positioning mechanism 15 includes a stretcher holder 14 that fixes the carriage 20 in the vehicle interior, and a caster positioning mechanism 30 that will be described later. As shown in FIG. 1, the stretcher holder 14 includes a holder main body 145 that extends in the vehicle front-rear direction, first and second hooks 141 and 142 that are hooked from the front on the columns 23 (231 and 232) of the carriage 20, The stopper part 143 which supports the support | pillar 23 (232) of the trolley | bogie 20 from the rear side, and the handle | steering-wheel part 144 which switch the locked state and unlocked state of the said stopper part 143 are provided. The first hook 141 of the stretcher holder 14 can be expanded and contracted along the holder main body 145, and is configured to be always urged backward. The movement of the carriage 20 in the vehicle width direction is restricted by hooking the first and second hooks 141 and 142 of the stretcher holder 14 to the columns 231 and 232 (described later) of the carriage 20 mounted on the vehicle 10. Thus, the carriage 20 is guided so as to move linearly only in the direction along the holder main body 145 of the stretcher holder 14 (vehicle longitudinal direction). When the carriage 20 is in the retracted position, the stretcher holder 14 holds the carriage 20 by holding the column 23 of the carriage 20 from the vehicle front-rear direction by the first and second hooks 141 and 142 and the stopper portion 143. It can be fixed at the storage position in the passenger compartment.
That is, the stretcher holder 14 corresponds to the cart holder according to the present invention.

<About the cart 20>
As shown in FIG. 2, the carriage 20 includes a carriage main body portion 21 that can lie down the patient and a suspension portion 22 that supports the carriage main body portion 21. The undercarriage 22 of the carriage 20 is provided with struts 23 (right front strut 231, right rear strut 232, left front strut 233, left rear strut 234). Casters 24 (241, 242, 243, 244) are attached to the lower end portions of 23, respectively.
The caster 24 includes a wheel 25 and a wheel mount 26 that supports the wheel 25 in a rollable manner. The caster 24 is a so-called revolving caster, and is configured to be horizontally rotatable around the horizontal rotation axis R as described above. As shown in FIG. 2, the caster 24 is attached to the lower end portion of the column 23 of the undercarriage portion 22 of the carriage 20 coaxially with the horizontal rotation axis R by a caster attachment portion 27. As shown in FIG. 2, the wheel contact surface S of the wheel 25 of the caster 24 is in an eccentric state with respect to the horizontal rotation axis R. For this reason, when the cart 20 moves in a state where the caster 24 faces the direction intersecting the moving direction of the cart 20, the caster 24 rotates horizontally so as to face the moving direction of the cart 20.

<About the structure of the caster positioning mechanism 30>
Next, the caster positioning mechanism 30 will be described.
As shown in FIG. 1, the caster positioning mechanism 30 is disposed on the floor surface 16 in the passenger compartment where the caster 241 on the right front side of the cart 20 is located at the retracted position of the cart 20. The caster positioning mechanism 30 is for directing the caster 241 of the cart 20 facing the front of the vehicle in the predetermined direction when the cart 20 moves to the storage position. As shown in FIG. 3, the caster positioning mechanism 30 includes a base portion 31 that fixes the caster positioning mechanism 30 to the floor surface 16 in the vehicle interior, and a guide portion 33 that projects upward from the base portion 31. Yes.
As shown in FIG. 3, the base portion 31 of the caster positioning mechanism 30 is formed in a substantially trapezoidal plate structure having a substantially right apex. The base portion 31 is formed with an engagement hole 32 through which a screw (not shown) for fixing the caster positioning mechanism 30 to the floor surface 16 in the vehicle compartment extends in the vehicle front-rear direction.

  As described above, the guide portion 33 of the caster positioning mechanism 30 is formed so as to protrude upward from the base portion 31 of the caster positioning mechanism 30. The guide portion 33 is made of a material having a relatively high rigidity so that the shape of the guide portion 33 can be maintained even when the weight of the carriage 20 and the weight of the victim are received. The guide portion 33 includes a guide portion main body 34 and guide portion end portions 35 positioned at both end portions of the guide portion main body 34.

As shown in FIG. 3, the guide portion main body 34 of the guide portion 33 has a longitudinal direction that is, for example, a predetermined angle (for example, from the right rear direction of the vehicle to the left front direction) with respect to the movement direction of the carriage 20. , 45 degrees). The guide body 34 is formed so that its cross section is an isosceles triangle. That is, the guide portion main body 34 includes a guide surface 341 and a guide facing surface 342.
As shown in FIG. 3, the guide surface 341 is provided on a slope portion on the vehicle rear side of the guide portion main body 34. The guide surface 341 is configured to incline in the vertical direction at an angle of, for example, 30 degrees with respect to the floor surface 16 in the vehicle interior. That is, the vertical direction of the inclination of the guide surface 341 is a direction orthogonal to the longitudinal direction of the guide body 34 as shown in FIG. As shown in FIGS. 4 and 5, the guide surface 341 includes a right side 25 </ b> R of the outer peripheral surface of the wheel 25 of the caster 241 and a caster contact portion 341 t when the carriage 20 moves to the stored position. It arrange | positions so that it may contact | abut. At this time, as shown in FIGS. 4 and 5, the caster abutting portion 341 t of the guide portion 341 is located behind the horizontal rotation axis R of the caster 241 in the moving direction of the carriage 20, and the wheels 25 of the caster 241. It is comprised so that it may contact | abut with the outer peripheral surface right side 25R.

As shown in FIG. 3, the guide facing surface 342 of the guide portion main body 34 of the guide portion 33 is provided on the opposite side of the guide surface 341 of the guide portion main body 34, that is, on the slope portion on the front side of the guide portion main body 34. Similar to the guide surface 341, the guide facing surface 342 is configured to be inclined in the vertical direction at an angle of, for example, 30 degrees with respect to the floor surface 16 in the vehicle interior.
Moreover, the guide part end part 35 of the guide part 33 is provided in the longitudinal direction both ends of the guide part main body 34 as mentioned above. As shown in FIG. 3, the guide portion end portion 35 is provided integrally with the guide portion main body 34, and is inclined in the vertical direction at an angle of, for example, 30 degrees with respect to the floor surface 16 in the vehicle interior. It is configured. That is, the wall surfaces (guide surface 341, guide facing surface 342, guide portion end portion 35) of the guide portion 33 of the caster positioning mechanism 30 are all raised gently with respect to the floor surface 16 in the passenger compartment. For this reason, for example, when an occupant in the passenger compartment moves, the guide portion 33 is not tripped.

<Operation of caster positioning mechanism 30>
Next, the function of the caster positioning mechanism 30 will be described.
First, the first hook 141 and the second hook 142 of the stretcher holder 14 are hooked on the columns 231 and 232 of the carriage 20 mounted on the vehicle 10. In this state, when the carriage 20 is moved in the vehicle front direction along the holder main body 145 of the stretcher holder 14, the casters 241 face the movement direction (vehicle front direction) of the carriage 20 as shown in FIG. In the state F1, the caster positioning mechanism 30 is approached. When the carriage 20 moves to the vicinity of the storage position, the right outer peripheral surface 25R of the wheel 25 of the caster 241 and the caster abutting portion 341t of the guide surface 341 are located behind the horizontal rotation axis R in the movement direction of the carriage 20. It will be in the state F2 which contact | abutted in the position. When the carriage 20 moves in the vehicle front direction from this state, the caster 241 is pulled forward of the vehicle at the position of the horizontal rotation axis R while being in contact with the caster contact portion 341t of the guide surface 341. become. Then, the caster 241 moves in the front direction of the vehicle while sliding in contact with the caster contact portion 341t of the guide surface 341 at the outer peripheral surface right side 25R of the wheel 25, and enters a state F3 where the caster 241 gradually rotates horizontally in the clockwise direction. When the carriage 20 reaches the storage position, the outer peripheral surface front side 25F of the wheel 25 of the caster 241 comes into contact with the guide surface 341, and the caster 241 faces the direction (predetermined direction) facing the guide surface 341. That is, the caster 241 is directed in a predetermined direction that intersects the moving direction of the carriage 20 (for example, a right diagonally forward direction that intersects the moving direction of the carriage 20 at 45 degrees) by the action of the guide portion 33. That's right. The predetermined direction is set by the arrangement angle of the guide surface 341, that is, the angle when the guide portion main body 34 intersects the moving direction of the carriage 20. When the caster 241 is in the K state, the wheel ground contact surface S of the caster 241 is offset in the clockwise direction around the horizontal rotation axis R with respect to the straight line Rt, as shown by a two-dot chain line in FIG. ing. Here, when the handle portion 144 of the stretcher holder 14 is operated, the stopper portion 143 is in a locked state as shown in FIG. 1, and the support 20 of the cart 20 is sandwiched together with the first and second hooks 141 and 142. Is fixed in the passenger compartment.

  Next, in order to move the cart 20 in the retracted position to the outside of the passenger compartment, first, the handle portion 144 of the stretcher holder 14 is operated to bring the stopper portion 143 into an unlocked state, and then the cart 20 is moved in the vehicle rearward direction. Pull out in the direction away from the storage position. Then, as shown in FIG. 7, since the horizontal rotation axis R of the caster 241 moves in the vehicle rearward direction on the straight line Rt, the caster 241 faces from the state K facing the guide surface 341 (predetermined direction), The vehicle is pulled in the rearward direction of the vehicle at the position of the horizontal rotation axis R. At this time, the wheel ground contact surface S of the caster 241 receives the frictional force from the floor surface 16 at a position offset with respect to the straight line Rt as described above. As shown in FIG. 5, the vehicle is reliably rotated horizontally around the horizontal rotation axis R in the clockwise direction, and is in a state B3 in which the moving direction (the vehicle rearward direction) away from the storage position of the carriage 20 is directed.

<Advantages of Embodiment 1>
According to the present invention, when the carriage 20 is pulled out from the storage position in the vehicle rearward direction (the direction away from the storage position), the caster 241 intersects the movement direction of the carriage 20 in a predetermined direction (for example, movement of the carriage 20). It turns horizontally only in the clockwise direction from the state of facing diagonally to the right (crossing at 45 degrees to the direction). That is, by setting the rotation direction of the caster so as not to interfere with the peripheral members (the column 13 and the like) at the storage position, the carriage 20 can be pulled out from the storage position so as not to interfere with the peripheral members.
The casters 241 of the carriage 20 are guided so as to face the guide portions 33 arranged so as to intersect with each other in a plan view with respect to the moving direction of the carriage 20. For this reason, when the cart 20 moves to the storage position by matching the direction facing the guide portion 33 with the predetermined direction (the direction diagonally right before intersecting the moving direction of the cart 20 at 45 degrees), The caster 241 can be automatically set in a predetermined direction. That is, a dedicated operation for directing the caster 241 in a predetermined direction is unnecessary, and usability is improved.
Moreover, the guide part 33 has a structure without a steep step. For this reason, for example, when an occupant in the passenger compartment moves, the guide portion 33 is not tripped.

[Modification]
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention.
For example, in the present embodiment, an example in which the guide portion 33 is formed in a shape having an inclined surface (guide surface 341, guide facing surface 342) is shown, but the shape of the guide portion 33 is not limited to this example. For example, the guide portion may have a cylindrical shape whose longitudinal direction intersects the moving direction of the carriage 20 in a plan view, or a wall-like shape that stands upright from the floor 16 in the vehicle interior. It may be.
In the first embodiment, the caster 241 rotates horizontally only in the clockwise direction as the predetermined direction. However, for example, when the space on the left side of the storage position is narrow, the caster 243 may be configured to rotate horizontally only in the counterclockwise direction. In this case, contrary to the example of the first embodiment, the guide body 33 of the guide portion 33 has a longitudinal direction in a plan view from the rear left direction of the vehicle to the front right direction with respect to the moving direction of the carriage 20. They are arranged to intersect at a predetermined angle. At this time, in the vicinity of the storage position, the left outer peripheral surface 25L of the wheel 25 is in contact with the caster contact portion 341t of the guide surface 341, and at the storage position, the caster 241 is left with respect to the moving direction of the carriage 20. It will be in the state of facing diagonally forward.
The specific angles exemplified in the first embodiment are merely examples, and may be set as appropriate. For example, the predetermined direction in which the caster 241 is directed at the storage position may be a direction oblique to the right with respect to the moving direction of the carriage 20 and may not intersect with the moving direction of the carriage 20 at 45 degrees. The angle at which the casters 241 intersect with the movement direction of the carriage 20 is set by the angle when the guide portion 33 is arranged so as to intersect with the movement direction of the carriage 20 in plan view as described above. The

In the first embodiment, the guide portion 33 of the caster positioning mechanism 30 includes a guide portion main body 34 and a guide portion end portion 35, and the guide portion main body 34 includes a planar guide surface 341 and a guide facing surface 342. An example configured is shown. However, the structure of the guide portion 33 may be, for example, a curved guide-to-face 442 as shown in FIG. 8, or may have no guide portion end portion 35.
Further, in the first embodiment, the configuration in which only one caster positioning mechanism 30 is arranged only around the caster 241 on the right front side of the carriage 20 in the storage position is illustrated, but a plurality of caster positioning mechanisms 30 are arranged. But there is no problem. That is, the caster positioning mechanism 30 may be arranged around the other casters 242, 243, and 244 so that the direction of each can be changed.

[Embodiment 2]
Hereinafter, the caster positioning mechanism 50 according to Embodiment 2 of the present invention will be described with reference to FIGS. 9 and 10, for the sake of convenience, some structures are omitted in the same manner as in FIGS. 5 and 7 in order to facilitate understanding of the operation of the wheel 25 of the caster 24.
In the caster positioning mechanism 50 according to the present embodiment, the caster positioning mechanism 30 according to the first embodiment is provided as a convex portion protruding upward from the floor surface 16 in the vehicle interior, whereas the floor surface 16 in the vehicle interior is provided. Provided as a recess recessed downward. The same members as those of the caster positioning mechanism 30 according to the first embodiment are denoted by the same reference numerals and description thereof is omitted.

The caster positioning mechanism 50 according to the present embodiment is formed as a recess 16d that is recessed one step below the floor surface 16 in the passenger compartment. As shown in FIG. 9, the caster positioning mechanism 50 has a concave wall surface 58 around it. The caster positioning mechanism 50 is provided at a position where the caster 241 is located when the carriage 20 is in the retracted position, and is continuous with the front end of the rail part 57. And a rotating space portion 56 formed on the surface.
As shown in FIG. 9, the rail portion 57 is defined by a rail portion wall surface 58r formed so that the side thereof extends in the vehicle front-rear direction. Therefore, when the carriage 20 moves to the storage position, the caster 20 241 can be guided in the vehicle longitudinal direction. As shown in FIG. 9, the rotation space portion 56 is defined by a rotation space portion wall surface 58h. Of the rotation space portion wall surface 58h, the guide surface 541 set on the front wall surface of the vehicle is, for example, a predetermined angle (in a plan view from the vehicle right rear direction to the left front direction) with respect to the moving direction of the carriage 20. For example, it is formed to intersect at 45 degrees. The guide surface 541 has a structure that functions in the same manner as the guide surface 341 of the first embodiment. That is, as shown in FIG. 9, when the carriage 20 moves to the retracted position, the guide surface 541 has a wheel outer peripheral surface right side 25R of the wheel 25 of the caster 241 and a horizontal rotation axis R in the vicinity of the retracted position. Further, the caster abutment portion 541t is in contact with the rear side of the carriage 20 in the moving direction. Thereby, it can guide so that the caster 241 may be in the state K which faced the direction (predetermined direction) which faces the guide surface 541. As shown in FIG. 10, the rotating space portion 56 is configured so that the wheels 25 of the casters 241 move even when the casters 241 rotate horizontally in the clockwise direction when the carriage 20 moves in the vehicle rearward direction (the direction away from the storage position). The outer peripheral surface rear side 25 </ b> B is shaped so as not to interfere with the space and has a space.
In the caster positioning mechanism 50 according to the present embodiment, a concave structure that is recessed with respect to the passenger compartment floor surface is used instead of a convex structure protruding to the passenger compartment floor surface as exemplified in the first embodiment. Thus, the caster 241 of the carriage 20 at the storage position can be directed in a predetermined direction.

[Modification]
Of course, the present invention is not limited to the configuration of the caster positioning mechanism 50 of the second embodiment, and may be configured with appropriate modifications within a range not departing from the gist of the present invention.
For example, in the second embodiment, an example in which the caster positioning mechanism 50 includes the rotation space portion 56 and the rail portion 57 has been described. However, the caster positioning mechanism 50 may be configured by only the rotation space portion 56.

R Horizontal axis of rotation 14 Stretcher holder (cart holder)
15 cart positioning mechanism 20 cart 24 caster 30 caster positioning mechanism 33 guide portion

Claims (4)

A caster positioning mechanism for a carriage, which is provided at a storage position of a carriage in a vehicle interior and positions a caster of the carriage at the storage position,
When the carriage moves to the retracted position, the direction of the caster facing the movement direction of the carriage is configured to be directed in a predetermined direction intersecting the movement direction of the carriage,
When the caster is directed in the predetermined direction, the caster is configured to rotate horizontally only in a predetermined direction when the carriage moves in a direction away from the storage position. Dolly caster positioning mechanism. A cart caster positioning mechanism according to claim 1,
It is provided with a guide portion arranged so as to intersect in a plan view with respect to the moving direction of the carriage,
When the carriage moves to the retracted position, the guide portion abuts on the caster at a position behind the horizontal rotation axis of the caster in the movement direction of the carriage to change the direction of the caster. A caster positioning mechanism for a carriage, wherein the caster is configured to direct the caster to face the predetermined direction by being guided so as to face the portion. A cart caster positioning mechanism according to claim 2,
The caster positioning mechanism for a carriage, wherein the guide portion is configured to gently rise with respect to a floor surface in a vehicle compartment. A caster positioning mechanism for a carriage according to any one of claims 1 to 3,
A vehicle comprising: a carriage holder that is arranged so as to extend along a movement direction of the carriage, and that guides the movement direction of the carriage linearly when the carriage moves to the storage position. Cart positioning mechanism.

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