JP7061290B2 - Transport trolley - Google Patents

Description

The present embodiment relates to a transport trolley that can be nested with other transport trolleys.

Conventionally, for example, in stores and factories, transport trolleys for transporting loads such as food have been used. Such a transport trolley has a trolley body having a pair of side frames, and the trolley body has a heat-insulating trolley cover for keeping a load such as food warm, cold, or protected. It will be installed. As such a transport trolley, for example, the one disclosed in Patent Document 1 is known.

Japanese Unexamined Patent Publication No. 2013-233970

However, the trolley cover of the conventional transport trolley is composed of, for example, a sewn sheet material, and is generally thin and flexible (see Patent Document 1). Therefore, in the conventional cover for a bogie, there is a problem that it is difficult to sufficiently improve the heat insulating performance and sufficiently protect the internal load.

On the other hand, it is conceivable to assemble the heat insulating panel into a box shape and mount it on the main body of the trolley, but in this case, the work of disassembling or folding the heat insulating panel may become complicated. Further, depending on the positional relationship of the heat insulating panel after disassembly, there is a problem that it becomes difficult to nest the transport trolley with another transport trolley.

It is an object of the present disclosure to provide a transport trolley that can be easily folded and nested with other transport trolleys.

The transport trolley according to the present embodiment is a transport trolley that can be nested with other transport trolleys, and includes a first side frame, a second side frame, the first side frame, and the second side frame. A bogie body having a connecting member for connecting the two to each other, and a plurality of panels provided so as to be expandable and foldable with respect to the bogie body, the plurality of panels having the plurality of panels in a box shape. The unfolded state and the folded state that enables nesting with the other transport trolleys by folding the plurality of panels can be taken, and in the folded state, at least a part of each panel is the first. By folding around the side frame or the second side frame, a first panel group including the first side frame and a second panel group including the second side frame are formed, and the first panel group is formed. When the thickness of the thicker of the total thickness of the second panel group and the total thickness of the second panel group is T, and the number of the transporting carts that can be nested is n, the back surface located on the back surface side of the plurality of panels. The panel is open in the horizontal direction by a width of (n-1) × T or more.

In the transport trolley according to the present embodiment, in the folded state, a part of the back panel may remain on the back side without being folded.

In the transport trolley according to the present embodiment, the trolley main body may have two wheels each below the first side frame and below the second side frame.

In the transport trolley according to the present embodiment, each panel may include a heat insulating panel.

In the transport trolley according to the present embodiment, the heat insulating panel may include a vacuum heat insulating material or a foam heat insulating material.

In the transport trolley according to the present embodiment, the plurality of panels are at least a top panel, a front panel, a back panel, a first side panel on the first side frame side, and a second side frame side. It may have a second side panel and the like.

In the transport trolley according to the present embodiment, the plurality of panels may further have a bottom panel.

In the transport trolley according to the present embodiment, the front panel may include a plurality of foldable front partial panels.

In the transport trolley according to the present embodiment, the trolley main body further has a foldable bottom plate, and the bottom plate is folded around the first side frame or the second side frame, whereby the first side frame is folded. The panel group or the second panel group may be formed.

In the transport trolley according to the present embodiment, the plurality of panels may be detachably attached to each other.

In the transport trolley according to the present embodiment, the plurality of panels include a panel provided with a sandwiched portion and a panel provided with a sandwiched portion for sandwiching the sandwiched portion, and the sandwiched portion and the sandwiched portion. A hook-and-loop fastener may be provided on each of the sandwiching portions.

In the transport trolley according to the present embodiment, the sandwiching portion may have a loop portion of a hook-and-loop fastener.

According to this embodiment, the panel can be easily folded and can be nested with other transport carts.

FIG. 1 is an exploded perspective view showing a state in which each panel of the transport trolley according to the first embodiment is removed. FIG. 2 is a perspective view showing a transport trolley according to the first embodiment, and is a view in which each panel is in an expanded state. FIG. 3 is a perspective view showing a transport trolley according to the first embodiment, and is a view in which each panel is in a folded state. FIG. 4 is a perspective view showing the main body of the dolly. FIG. 5 is a partially enlarged front view of the bogie body. FIG. 6 is a cross-sectional view showing each panel. 7 (a) and 7 (b) are sectional views showing the vacuum heat insulating material of each panel. 8 (a) and 8 (b) are a plan view and a front view showing a state before each panel of the transport trolley according to the first embodiment is changed from the unfolded state to the folded state. 9 (a) and 9 (b) are a plan view and a front view showing a process of changing the front panel of the transport trolley from the unfolded state to the folded state according to the first embodiment, respectively. 10 (a)-(c) are plan views showing a step of changing the front panel of the transport trolley according to the first embodiment from the unfolded state to the folded state. 11 (a) and 11 (b) are a plan view and a front view showing a process of changing the front panel of the transport trolley from the unfolded state to the folded state according to the first embodiment, respectively. 12 (a) and 12 (b) are a plan view and a front view showing a process of changing the bottom panel of the transport trolley from the unfolded state to the folded state according to the first embodiment, respectively. 13 (a) and 13 (b) are a plan view and a front view showing a process of changing the bottom plate of the transport trolley from the unfolded state to the folded state according to the first embodiment, respectively. 14 (a) and 14 (b) are a plan view and a front view showing a process of changing the top panel of the transport trolley from the unfolded state to the folded state according to the first embodiment, respectively. 15 (a)-(c) are plan views showing a step of changing the back panel of the transport trolley according to the first embodiment from the unfolded state to the folded state. 16 (a)-(c) are plan views showing a process of nesting a plurality of transport carts. 17 (a) and 17 (b) are schematic plan views for explaining the action when nesting a transport trolley. FIG. 18 is a plan view showing a transport trolley according to a modified example, and is a view in which each panel is in an expanded state. FIG. 19 is a perspective view showing a bogie body according to a modified example. FIG. 20 is a perspective view showing a transport trolley according to the second embodiment, and is a view in which each panel is in an expanded state. FIG. 21 is a perspective view showing a transport trolley according to the second embodiment, and is a view in which only the front panel is in a folded state. FIG. 22 is a perspective view showing a transport trolley according to the second embodiment, and is a view in which each panel is in a folded state. 23 (a)-(c) are plan views showing a step of changing the front panel of the transport trolley according to the second embodiment from the unfolded state to the folded state. FIGS. 24 (a)-(c) are front views showing a process of changing the top panel of the transport trolley from the unfolded state to the folded state according to the second embodiment. 25 (a) and 25 (b) are plan views showing a step of changing the back panel of the transport trolley according to the second embodiment from the unfolded state to the folded state. 26 (a)-(c) are front views showing a step of changing the bottom panel of the transport trolley from the unfolded state to the folded state in the modified example of the second embodiment. 27 (a) and 27 (b) are partially enlarged plan views showing the mounting portions of the front panel and the first side panel according to the second embodiment. FIG. 28 (a) is a partially enlarged plan view showing a mounting portion of the front panel and the first side panel in the second embodiment, and FIG. 28 (b) is a first embodiment in the second embodiment. It is a partially enlarged plan view which shows the side panel. FIG. 29 is a partially enlarged plan view showing a mounting portion between the front panel and the first side panel in the modified example of the second embodiment. FIG. 30 is a partially enlarged plan view showing a mounting portion between the back panel and the first side panel according to the second embodiment. FIG. 31 is a partially enlarged front view showing a mounting portion between the top panel and the first side panel in the second embodiment. FIG. 32 is a partially enlarged front view showing a mounting portion between the bottom panel and the gap panel in the second embodiment. FIG. 33 is a cross-sectional view showing each panel in the second embodiment. 34 (a) and 34 (b) are partially enlarged plan views showing a mounting portion between the back panel and the first side panel in the modified example of the second embodiment. 35 (a) and 35 (b) are partially enlarged front views showing a mounting portion between the top panel and the first side panel in the modified example of the second embodiment.

(First Embodiment)
Hereinafter, the first embodiment will be described with reference to the drawings. Each figure shown below is schematically shown. Therefore, the size and shape of each part are exaggerated as appropriate to facilitate understanding. In addition, it is possible to change and implement as appropriate within the range that does not deviate from the technical idea. In each of the figures shown below, the same parts are designated by the same reference numerals, and some detailed description may be omitted. Further, the numerical values such as the dimensions of each member and the material names described in the present specification are examples of the embodiment, and the present invention is not limited to these, and can be appropriately selected and used. In the present specification, terms that specify a shape or a geometric condition, such as parallel, orthogonal, and vertical, are used to include substantially the same state in addition to the exact meaning.

Further, in the following embodiments, the "X direction" is a direction parallel to the longitudinal direction of the transport trolley and parallel to the floor surface on which the transport trolley is arranged, and the "Y direction" is the X direction. It is perpendicular to the floor and parallel to the floor on which the transport trolley is placed. The "Z direction" is a direction parallel to the vertical direction. Further, the "front" is a surface perpendicular to the floor surface, and refers to a surface facing the direction in which another transport trolley enters during nesting, and the "rear surface" is a surface perpendicular to the floor surface. A surface that faces the front. The "top surface" is a surface parallel to the floor surface and refers to the upper surface of the transport trolley, and the "bottom surface" is a surface parallel to the floor surface and is the lower side of the transport trolley. Refers to the face of. The "side surface" is a surface perpendicular to the floor surface and refers to a surface on the longitudinal end side of the transport trolley.

(Composition of transport trolley)
The configuration of the transport trolley according to the present embodiment will be described with reference to FIGS. 1 to 5. FIG. 1 is an exploded perspective view showing a state in which each panel of the transport trolley according to the present embodiment is removed. FIG. 2 is a perspective view in which the transport trolley according to the present embodiment is in the deployed state. FIG. 3 is a perspective view in which the transport trolley according to the present embodiment is in a folded state. FIG. 4 is a perspective view of the bogie body. FIG. 5 is a partially enlarged front view of the bogie body.

As shown in FIG. 1, the transport trolley 10 according to the present embodiment has a trolley main body 50 and a plurality of (six pieces in this case) panels 11 to be freely expandable and foldable with respect to the trolley main body 50, respectively. It is equipped with 16. Of these, the plurality of panels 11 to 16 are in an unfolded state (see FIG. 2) that is unfolded and assembled into a box shape, and in a folded state that can be nested with other transport trolleys by folding the plurality of panels 11 to 16. (See FIG. 3) can be taken.

The transport trolley 10 is used for storing or transporting a load that needs to be kept cold or warm, for example, in a store, a factory, a distribution process, or the like. In such a transport trolley 10, the temperature change inside the transport trolley 10 is as much as possible because the accommodation space 20 (described later) capable of accommodating the load is surrounded by the six panels 11 to 16. It is configured to be suppressed. On the other hand, when the transport trolley 10 is not used, it is possible to compactly store a plurality of transport trolleys 10 by nesting (stacking them in a nested manner) with other same transport trolleys 10. be.

Next, the configuration of the carriage main body 50 will be described with reference to FIG. FIG. 4 is a perspective view showing the bogie body 50. As shown in FIG. 4, the bogie main body 50 has a first side frame 51, a second side frame 52, and a connecting member 53 for connecting the first side frame 51 and the second side frame 52 to each other. There is. In this case, the bogie body 50 has six wheels 61 to 66, and the wheels 61 to 66 are attached downward from the connecting member 53, respectively.

The first side frame 51 is provided at one end in the longitudinal direction (minus end in the X direction) of the bogie body 50, and projects upward (plus side in the Z direction) from the connecting member 53. The first side frame 51 has a lower support portion 54 connected to the connecting member 53, an annular (rectangular) peripheral edge frame 55 connected to the lower support portion 54, and a horizontal direction (Y) inside the peripheral edge frame 55, respectively. It has a plurality of horizontal rails 56 extending in the direction). The plurality of cross rails 56 are arranged at equal intervals along the vertical direction (Z direction). Two wheels 61 and 62 are provided below the first side frame 51.

The second side frame 52 is provided at the other end in the longitudinal direction (plus side end in the X direction) of the bogie body 50, and projects upward (plus side in the Z direction) from the connecting member 53. The configuration of the second side frame 52 is substantially the same as the configuration of the first side frame 51 described above. Two wheels 65 and 66 are provided below the second side frame 52.

The connecting member 53 has a substantially royal shape in a plan view (a shape in which two "E" characters are back-to-back), and is attached to a central frame 57 extending in the longitudinal direction (X direction) of the bogie body 50 and a central frame 57, respectively. It has three connected wheel mounting frames 67-69.

The central frame 57 is located substantially at the center of the carriage body 50 in the width direction (Y direction). The central frame 57 has sufficient strength to hold the load of the transport trolley 10 and its load, and has a narrow width that does not hinder nesting between the transport trolleys 10. .. Specifically, the width Wa (length in the Y direction) of the central frame 57 may be 5% or more and 33% or less of the maximum width Wb (length in the Y direction) of the carriage body 50. Further, the intervals Pa and Pb may be, for example, 20 mm or more and 200 mm or less, although it depends on the maximum width Wb of the carriage body 50.

Each of the three wheel mounting frames 67 to 69 extends in a direction (Y direction) orthogonal to the central frame 57. The wheel mounting frames 67 to 69 include a first wheel mounting frame 67 located on the first side frame 51 side and a second wheel mounting frame 68 located between the first side frame 51 and the second side frame 52. , A third wheel mounting frame 69 located on the second side frame 52 side.

The first wheel mounting frame 67 and the second wheel mounting frame 68 are arranged at intervals Pa in the longitudinal direction (X direction) of the bogie body 50. The second wheel mounting frame 68 and the third wheel mounting frame 69 are arranged with a gap Pb in the longitudinal direction (X direction) of the bogie body 50. In this case, the distance Pa between the first wheel mounting frame 67 and the second wheel mounting frame 68 may be equal to the distance Pb between the second wheel mounting frame 68 and the third wheel mounting frame 69 (Pa = Pb). It may be different from the interval Pb.

The first wheel mounting frame 67 is provided at one end in the longitudinal direction (minus end in the X direction) of the central frame 57. The first wheel 61 and the second wheel 62 are attached to both ends in the longitudinal direction (both ends in the Y direction) of the first wheel mounting frame 67, respectively.

The second wheel mounting frame 68 is provided at the central portion in the longitudinal direction (central portion in the X direction) of the central frame 57. The third wheel 63 and the fourth wheel 64 are attached to both ends in the longitudinal direction (both ends in the Y direction) of the second wheel mounting frame 68, respectively. The width (length in the X direction) Wc of the second wheel mounting frame 68 is narrowed to such an extent that it does not interfere with nesting of the transport carts 10. Specifically, the width Wc of the second wheel mounting frame 68 may be 3.7% or more and 12.6% or less of the maximum length (length in the X direction) La of the carriage body 50. Further, the width Wc may be, for example, 5 mm or more and 150 mm or less, although it depends on the maximum length La of the carriage body 50.

The third wheel mounting frame 69 is provided at the other end in the longitudinal direction (plus side end in the X direction) of the central frame 57. The fifth wheel 65 and the sixth wheel 66 are attached to both ends in the longitudinal direction (both ends in the Y direction) of the third wheel mounting frame 69, respectively.

As described above, the wheels 61 to 66 are composed of the first wheel 61, the second wheel 62, the third wheel 63, the fourth wheel 64, the fifth wheel 65, and the sixth wheel 66. Of these, the first wheel 61, the second wheel 62, the fifth wheel 65, and the sixth wheel 66 are free wheels, and each of them rotates along a horizontal axle and turns extending in the vertical direction (Z direction). It can be turned by the shaft. On the other hand, the third wheel 63 and the fourth wheel 64 are fixed wheels, each of which rotates along a horizontal axle, but cannot turn around a vertical (Z direction) axis.

The wheels 61 to 66 are front and rear with the central fixed wheels (third wheel 63 and fourth wheel 64) so that the load can be stably traveled straight when the load is loaded on the transport trolley 10. Two wheels of either one of the free wheels (first wheel 61 and second wheel 62, or fifth wheel 65 and sixth wheel 66) may be combined and grounded. In addition, when the load is not placed on the transport trolley 10, the central fixed wheels (third wheel 63 and fourth wheel 64) are grounded in order to facilitate turning and nesting and to make small turns easier. Instead, only the front and rear free wheels (first wheel 61, second wheel 62, fifth wheel 65, and sixth wheel 66) may be grounded. Not limited to this, the bogie body 50 may have four wheels 61, 62, 65, 66 and may not have the second wheel mounting frame 68.

Further, a foldable bottom plate 58 is provided on the connecting member 53. The bottom plate 58 has a substantially rectangular parallelepiped shape, extends between the first side frame 51 and the second side frame 52 in the longitudinal direction (X direction), and extends between the first side frame 51 and the second side frame 52 in the lateral direction (Y direction). It has substantially the same length as the two-side frame 52. Further, the bottom plate 58 has sufficient strength to hold the load of the load of the transport carriage 10, and the thickness Ta thereof may be, for example, 1 cm or more and 20 cm or less, preferably 3 cm or more and 15 cm or less.

The bottom plate 58 is movable with respect to the connecting member 53, and is in a deployed state (see FIGS. 2 and 4) arranged on the connecting member 53 and is lifted with respect to the connecting member 53 to form a second side frame 52. It can be folded around (see FIG. 3). That is, when the panels 11 to 16 are unfolded and assembled in a box shape (see FIGS. 2 and 4), the bottom plate 58 is arranged in a horizontally unfolded state. On the other hand, when a plurality of panels 11 to 16 are folded to take a folded state (see FIG. 3), the bottom plate 58 is vertically lifted and arranged in the folded state.

As shown in FIG. 5, the bottom plate 58 is rotatable about a fulcrum portion 58a provided inside the lower support portion 54 (minus side in the X direction). The fulcrum portion 58a is located below the bottom panel 16 (described later) (minus side in the Z direction). In this case, the entire connecting portion (fulcrum portion 58a) connecting the bottom plate 58 and the lower support portion 54 is located on the outer side of the panels 11 to 16. As a result, when the surroundings are surrounded by a heat insulating material as described later, the connecting portion is not arranged so as to straddle the accommodation space 20 (described later) and the outside air, and the connecting portion becomes a heat bridge. It is possible to prevent the heat insulating property of the accommodation space 20 from being lowered. Further, there is no possibility that the connecting portion (fulcrum portion 58a) interferes with the panels 11 to 16 while the bottom plate 58 is moved between the folded state and the unfolded state.

(Panel configuration)
Next, the configurations of the panels 11 to 16 will be described with reference to FIGS. 1 to 3.

The panels 11 to 16 are provided so as to be freely unfoldable and foldable with respect to the bogie main body 50 as a whole, and as described above, they can be unfolded and assembled in a box shape (FIG. 2) and can be nested. It can be in a folded state (FIG. 3).

FIG. 2 shows a case where the panels 11 to 16 are in the expanded state. As shown in FIG. 2, the panels 11 to 16 have a substantially rectangular parallelepiped shape in the unfolded state, and the top panel 11, the front panel 12, the back panel 13, the first side panel 14, and the second. It includes a side panel 15 and a bottom panel 16. The top panel 11, the first side panel 14, the second side panel 15, the back panel 13, the front panel 12, and the bottom panel 16 are the main surfaces (of the six surfaces constituting each panel). , The widest pair of faces facing each other) each have a substantially rectangular shape. Further, the main surfaces of the front panel 12 and the back panel 13 have substantially the same size as each other, and the main surfaces of the first side panel 14 and the second side panel 15 are substantially the same as each other. Has a size. Each of the panels 11 to 16 is made of a plate-shaped member having rigidity, so as not to be flexibly deformed during use.

In the unfolded state, it is possible to form a storage space 20 for accommodating a load by being surrounded by the six panels 11 to 16. When each of the panels 11 to 16 is expanded, a substantially rectangular parallelepiped accommodation space 20 is formed between the panels 11 to 16. When the accommodation space 20 is surrounded by a heat insulating material as described later, the inflow and outflow of heat from the outside is restricted, and the heat insulating property can be maintained. Further, at least a part of the six panels 11 to 16 is provided so as to be movable with respect to the other adjacent panels 11 to 16, respectively. Thereby, the transport trolley 10 can be changed from the unfolded state in which the accommodating space 20 is formed to the folded state in which the accommodating space 20 is not formed, and can be changed from the folded state to the unfolded state. Therefore, when the transport trolley 10 is not used, the panels 11 to 16 can be nested with another transport trolley 10 by folding the panels 11 to 16. Further, in the deployed state, the peripheral edges of each of the six panels 11 to 16 are in close contact with any of the other panels 11 to 16, whereby the airtightness of the accommodation space 20 is ensured.

Each of the six panels 11 to 16 includes a heat insulating panel having a heat insulating portion 40 including the vacuum heat insulating material 41 (see FIG. 6). In the present embodiment, the six panels 11 to 16 each include the vacuum heat insulating material 41, but the present invention is not limited to this. Some or all of the panels 11 to 16 may contain a heat insulating material such as a foamed heat insulating material.

Next, the configuration of each of the panels 11 to 16 will be further described. In the following, "the panels 11 to 16 (partial panels) are parallel (vertical) to a predetermined surface" means that "the main surface of the panels 11 to 16 (partial panels) is parallel to a predetermined surface". It means "parallel (vertical)".

(Top panel)
The top panel 11 is a panel located on the top side (plus side in the Z direction) in the expanded state (FIG. 2), and is arranged parallel to the horizontal plane (XY plane). Further, in the deployed state, the top panel 11 includes the first side frame 51 and the second side frame 52 of the bogie body 50, the first side panel 14, the second side panel 15, the back panel 13, and the front panel. It is placed above the twelve.

The top panel 11 has a structure that can be partially opened and closed, and is between the first top panel 11a located on the first side frame 51 side and the first side frame 51 and the second side frame 52. It has a second top surface partial panel 11b located and a third top surface partial panel 11c located on the second side frame 52 side.
Of these, the second top surface portion panel 11b is foldably attached to the third top surface portion panel 11c via the top surface hinge member 21a (see FIG. 14B). Further, the second top surface portion panel 11b is detachably attached to the first top surface portion panel 11a via the surface fastener (detachable member) 21b (see FIG. 14B), and the surface fastener 21b can be removed. If so, the second top surface portion panel 11b is configured to be separated from the first top surface portion panel 11a.

The first top surface partial panel 11a, the second top surface partial panel 11b, and the third top surface partial panel 11c are both arranged horizontally (parallel to the XY plane) in the unfolded state (FIG. 2). On the other hand, in the folded state (FIG. 3), the first top surface partial panel 11a and the third top surface partial panel 11c are continuously arranged horizontally. On the other hand, the second top surface portion panel 11b is folded downward by being removed from the first top surface portion panel 11a, and is arranged so as to hang down from the third top surface portion panel 11c. At this time, the second top surface partial panel 11b is arranged around the inside of the second side frame 52, inside the folded bottom plate 58 (minus side in the X direction), and is parallel to the YZ plane.

(Front panel)
The front panel 12 is a panel located on the front side (minus side in the Y direction) in the expanded state (FIG. 2), and is arranged perpendicular to the horizontal plane (XY plane) (parallel to the ZX plane). Further, in the deployed state, the front panel 12 is arranged between the first side frame 51 and the second side frame 52 of the bogie main body 50.

The front panel 12 has a foldable structure, and is a second front panel 12a located on the side of the first side frame 51 and a second front panel 12 located substantially between the first side frame 51 and the second side frame 52. It has a front portion panel 12b and a third front portion panel 12c located on the second side frame 52 side.
Of these, the first front surface partial panel 12a is foldably attached to the first side surface panel 14 via the first front hinge member 22a (see FIGS. 9 (a) and 10 (a)-(c)). .. Further, the second front surface portion panel 12b is foldably attached to the first front surface portion panel 12a via the second front hinge member 22b (see FIGS. 9 (a) and 10 (a)-(c)). Has been done. Further, the third front surface portion panel 12c is foldably attached to the second front surface portion panel 12b via the third front hinge member 22c (see FIGS. 9 (a) and 10 (a)-(c)). There is. The third front portion panel 12c and the second side surface panel 15 are separated from each other, and may be detachably attached to each other via, for example, a hook-and-loop fastener (detachable member) (not shown).

The first front part panel 12a, the second front part panel 12b, and the third front part panel 12c are both arranged perpendicular to the horizontal plane (XY plane) (parallel to the ZX plane) in the unfolded state (FIG. 2). To. On the other hand, in the folded state (FIG. 3), the first front portion panel 12a, the second front portion panel 12b, and the third front portion panel 12c are folded in a folding screen shape so as to overlap each other, and further, the vertical axis (Z direction). It rotates around the axis) and is arranged on the outside (minus side in the X direction) of the first side panel 14. At this time, the first front surface portion panel 12a, the second front surface portion panel 12b, and the third front surface portion panel 12c are folded and arranged around the outer side of the first side frame 51, and are parallel to the YZ plane.

In this way, by arranging the first front part panel 12a, the second front part panel 12b, and the third front part panel 12c outside the first side frame 51, a wide storage space 20 for accommodating the load is secured. can do. Further, when the bottom plate 58 is lifted toward the second side frame 52, the first front surface portion panel 12a, the second front surface portion panel 12b, and the third front surface portion panel 12c are prevented from interfering with the moving bottom plate 58. There is. The widths (lengths in the Y direction in the folded state) of the first front surface portion panel 12a, the second front surface portion panel 12b, and the third front surface portion panel 12c may be substantially the same as each other. Further, the widths of the first front surface portion panel 12a, the second front surface portion panel 12b, and the third front surface portion panel 12c are substantially the same as the width (length in the Y direction) of the first side frame 51, or the first side frame 51. It is longer than the width of.

(Back panel)
The back panel 13 is a panel located on the back side (plus side in the Y direction) in the expanded state (FIG. 2), and is arranged perpendicular to the horizontal plane (XY plane) (parallel to the ZX plane). Further, in the deployed state, the back panel 13 is arranged between the first side frame 51 and the second side frame 52 of the carriage body 50.

The back panel 13 has a foldable structure and has a first back surface partial panel 13a located on the first side frame 51 side and a second back surface partial panel 13b located on the second side frame 52 side. There is. Of these, the second back surface partial panel 13b is foldably attached to the first back surface partial panel 13a via the first back surface hinge member 23a (see FIGS. 15 (a)-(c)). Further, the first back surface partial panel 13a is movably attached to the first side surface panel 14 via the second back surface hinge member 23b (see FIGS. 15 (a)-(c)). Not limited to this, the first back surface partial panel 13a may be fixed to the first side surface panel 14 so as not to be foldable.

The first back surface partial panel 13a and the second back surface partial panel 13b are both arranged perpendicular to the horizontal plane (XY plane) (parallel to the ZX plane) in the unfolded state (FIG. 2). On the other hand, in the folded state (FIG. 3), the second back surface portion panel 13b is folded so as to overlap the first back surface portion panel 13a and is arranged inside the first back surface portion panel 13a (minus side in the Y direction). .. At this time, the first back surface partial panel 13a remains on the back side without being folded. That is, the first back surface partial panel 13a is in the same position as in the unfolded state even in the folded state, and is arranged perpendicular to the horizontal plane (XY plane) (parallel to the ZX plane). Further, the first back surface partial panel 13a and the second back surface partial panel 13b are folded and arranged vertically on the first side frame 51 and are parallel to the ZX plane. In this way, in the folded state, the back panel 13 is opened by removing the second back panel 13b. The portion where the back panel 13 is opened has a predetermined width W1 in the horizontal direction (X direction) (FIG. 3).
On the other hand, the portion where the first back surface partial panel 13a and the second back surface partial panel 13b overlap is covered without being opened, and has a predetermined width W2 in the horizontal direction (X direction) (FIG. 3). Depending on how the first back surface partial panel 13a and the second back surface partial panel 13b are folded, the back panel 13 may be opened over the entire horizontal direction (X direction).

(1st side panel)
The first side surface panel 14 is a panel located on the first side frame 51 side (minus side in the X direction) in both the expanded state (FIG. 2) and the folded state (FIG. 3), and is a panel with respect to a horizontal plane (XY plane). Arranged vertically (parallel to the YZ plane). The first side panel 14 is composed of a single plate-shaped member. Further, the first side surface panel 14 is arranged around the outer side of the first side frame 51 of the carriage body 50 without moving in both the expanded state (FIG. 2) and the folded state (FIG. 3), and is arranged on the YZ plane. It is parallel. The first side surface panel 14 has a size that covers the entire outside of the first side frame 51, and is fixed to the first side frame 51 by a connecting means (not shown).

(Second side panel)
The second side surface panel 15 is a panel located on the second side frame 52 side (plus side in the X direction) in both the expanded state (FIG. 2) and the folded state (FIG. 3), with respect to the horizontal plane (XY plane). Arranged vertically (parallel to the YZ plane). The second side surface panel 15 is composed of a single plate-shaped member. Further, the second side surface panel 15 is arranged around the outer side of the second side frame 52 of the carriage body 50 without moving in both the expanded state (FIG. 2) and the folded state (FIG. 3), and is arranged on the YZ plane. It is parallel. The second side surface panel 15 has a size that covers the entire outside of the second side frame 52, and is fixed to the second side frame 52 by a connecting means (not shown).

(Bottom panel)
The bottom panel 16 is a panel located on the bottom side (minus side in the Z direction) in the expanded state (FIG. 2), and is arranged parallel to the horizontal plane (XY plane). Further, in the deployed state, the bottom panel 16 is arranged on the bottom plate 58 of the carriage body 50 and between the first side frame 51 and the second side frame 52. The bottom panel 16 is composed of a single plate-shaped member and has a structure that can be folded by lifting. The bottom panel 16 is foldably attached to the first side frame 51 via a bottom hinge member 26a (see FIG. 12B).

The bottom panel 16 is arranged parallel to the horizontal plane (XY plane) in the unfolded state (FIG. 2). On the other hand, in the folded state (FIG. 3), the bottom panel 16 is folded so as to overlap the inside of the first side frame 51 (plus side in the X direction), and is located around the inside of the first side frame 51. That is, in the folded state, the bottom panel 16 is arranged perpendicular to the horizontal plane (XY plane) (parallel to the YZ plane). At this time, the bottom panel 16 is detachably attached to the first side frame 51 via, for example, a hook-and-loop fastener (detachable member) 26b (see FIG. 12B). In this case, the hook-and-loop fastener 26b makes it possible to easily attach the bottom panel 16 to the first side frame 51 and remove the bottom panel 16 from the first side frame 51. Further, since the hook-and-loop fastener 26b has a certain area, the bottom panel 16 can be attached to the first side frame 51 without strictly aligning the bottom panel 16 with respect to the first side frame 51. .. Further, it is possible to absorb the positional deviation and the dimensional error of the bottom panel 16 in the surface direction, and it is easy to finely adjust the mounting position of the bottom panel 16 with respect to the first side frame 51.

The above-mentioned top surface hinge member 21a, first front hinge member 22a, second front hinge member 22b, third front hinge member 22c, first back hinge member 23a, second back hinge member 23b, and bottom hinge member 26a are , Each may be composed of, for example, a bendable connecting cloth (connecting member). As described above, by configuring each hinge member 21a, 22a, 22b, 22c, 23a, 23a, 23b, 26a from the connecting cloth, each panel (partial panel) can be easily unfolded or folded.

FIG. 3 shows a case where the panels 11 to 16 are in the folded state as described above.
As shown in FIG. 3, in the folded state, at least a part of each of the panels 11 to 16 is folded around the first side frame 51 or the second side frame 52, respectively.

That is, around the first side frame 51, the third front surface portion panel 12c, the second front surface portion panel 12b, the first front surface portion panel 12a, and the first side surface panel are arranged in this order from the outside (minus side in the X direction). 14 and the bottom panel 16 overlap each other. The first side frame 51 is located between the first side panel 14 and the bottom panel 16. Further, around the second side frame 52, the second side surface panel 15, the bottom plate 58, and the second top surface portion panel 11b are overlapped in order from the outside (plus side in the X direction). The second side frame 52 is located between the second side panel 15 and the bottom plate 58.

In this case, the first panel group G1 and the second panel group G2 are formed around the first side frame 51 and the second side frame 52, respectively. Of these, the first panel group G1 includes a third front portion panel 12c, a second front portion panel 12b, a first front portion panel 12a, a first side panel 14, a first side frame 51, and a bottom panel 16. Consists of. Further, the second panel group G2 is composed of a second side surface panel 15, a second side frame 52, a bottom plate 58, and a second top surface partial panel 11b. In the present embodiment, the first panel group G1 (second panel group G2) includes not only all or a part of each of the panels 11 to 16 but also the first side frame 51 (second side frame 52) and the like. The bottom plate 58 is also included.

In the present embodiment, the thicker of the total thickness T1 of the first panel group G1 and the total thickness T2 of the second panel group G2 is T, and the number of transportable carriages 10 that can be nested is n. .. In this case, the open width W1 of the back panel 13 described above has a length of (n-1) × T or more in the horizontal direction (X direction). For example, when the number of transporting carts 10 that can be nested is three as described later, W1 has a length of 2T or more. In this way, by setting the width W1 of the open portion of the back panel 13 to a length of (n-1) × T or more, the transport trolley 10 and the like can be passed through the open portion of the back panel 13. It is possible to nest the transport trolley 10 of the above. On the other hand, as a comparative example, when the open width W1 of the back panel 13 is less than (n-1) × T, another transport trolley 10 interferes with a part of the transport trolley 10, and n units. Nesting the transport trolley 10 becomes substantially difficult.

The thickness of each panel 11 to 16 is preferably 5 mm or more and 50 mm or less, respectively. In the present embodiment, the case where the thicknesses of the panels 11 to 16 are the same as each other will be described as an example, but the thicknesses of the panels 11 to 16 may be different from each other. The thickness (length in the X direction) of the first side frame 51 and the second side frame 52 is, for example, 10 mm or more and 50 mm or less. The total thickness T1 (T2) of the first panel group G1 (second panel group G2) is the panels 11 to 12, 14 to 16, and the first panel included in the first panel group G1 (second panel group G2). Of the side frame 51, the second side frame 52, and the bottom plate 58, the distance between the outer surface of the outermost member and the inner surface of the innermost member. In this case, it is preferable that the total thickness T1 of the first panel group G1 and the total thickness T2 of the second panel group G2 be as small as possible. By reducing the total of the total thickness T1 and the total thickness T2, the number of transport trolleys 10 that can be nested can be increased.

The distance Pa (FIG. 4) between the first wheel mounting frame 67 and the second wheel mounting frame 68 and the distance Pb (FIG. 4) between the second wheel mounting frame 68 and the third wheel mounting frame 69 are defined. It is necessary to satisfy the relationship of "T × n <Pa" and "Wc × n <Pb". However, when the width of the wheel mounting frames 67 and 69 is wider (larger) than T, it is necessary to satisfy the relationship of "width of wheel mounting frames 67 and 69 x n <Pa" and "Wc x n <Pb".

(Internal structure of the panel)
Next, the structure of each panel 11 to 16 will be described. FIG. 6 is a cross-sectional view showing the heat insulating portion 40 of each of the panels 11 to 16. 7 (a) and 7 (b) are cross-sectional views showing the vacuum heat insulating material 41 included in the heat insulating portion 40.

As shown in FIG. 6, the heat insulating portion 40 of each panel 11 to 16 includes a vacuum heat insulating material 41, a foam heat insulating material 42, a heat insulating surrounding portion 43, a heat insulating material protective member 44, and a heat insulating sheet 45. Have.

Of these, the vacuum heat insulating material 41 is attached to the foam heat insulating material 42. The vacuum heat insulating material 41 is composed of a core material 41a and an exterior material 41b provided around the core material 41a. The foam heat insulating material 42 is arranged on the accommodation space 20 side (lower side in FIG. 6) of the vacuum heat insulating material 41. This makes it possible to reduce the risk of damaging the vacuum heat insulating material 41 when the load placed in the accommodation space 20 collides with the load.

The foam heat insulating material 42 can be arranged adjacent to at least the accommodation space 20 side of the vacuum heat insulating material 41. As the foamed heat insulating material 42, a known foamable heat insulating material can be used, and for example, a polyurethane foam may be used.

The heat insulating outer peripheral portion 43 is formed so as to surround the vacuum heat insulating material 41. The heat insulating outer peripheral portion 43 is arranged on the foamed heat insulating material 42 and is fixed to the foamed heat insulating material 42. Since the heat insulating outer peripheral portion 43 is arranged so as to surround the vacuum heat insulating material 41, the heat insulating performance is improved as compared with the case where the heat insulating outer peripheral portion 43 is not arranged. Further, the vacuum heat insulating material 41 has substantially the same area as the foam heat insulating material 42, and a panel configuration that does not use the heat insulating outer peripheral portion 43 is also possible. In this case, the heat insulating performance can be further improved, but since there is no heat insulating outer peripheral portion 43, there is a possibility that the vacuum heat insulating material 41 is weak against the breakage of the vacuum heat insulating material 41 due to the intrusion of a sharp object from the side. A slight gap is formed between the heat insulating outer peripheral portion 43 and the vacuum heat insulating material 41, and even if the size of the vacuum heat insulating material 41 changes slightly, the vacuum heat insulating material 41 is outside the heat insulating material 41. It can be accommodated in the enclosure 43.

Further, the heat insulating material protective member 44 is provided on the heat insulating outer peripheral portion 43 and mainly serves to protect the vacuum heat insulating material 41. As the heat insulating material protective member 44, for example, a protective material made of an organic polymer can be used.

The heat shield sheet 45 is arranged so as to wrap the entire outer periphery of the vacuum heat insulating material 41, the foam heat insulating material 42, the heat insulating outer peripheral portion 43, and the heat insulating material protective member 44. The heat shield sheet 45 can be arranged so as to cover the entire vacuum heat insulating material 41 and the foam heat insulating material 42. Examples of the heat shield sheet 45 include a multilayer sheet containing a metal foil, a thin-film deposition sheet in which a thin-film deposition layer is formed on one side of a resin sheet, and the like.

Next, the vacuum heat insulating material 41 will be further described. As shown in FIG. 7A, the vacuum heat insulating material 41 is composed of a core material 41a and an exterior material 41b having a gas barrier property, and is a heat insulating material obtained by reducing the pressure inside the exterior material 41b. FIG. 7B is another example of the vacuum heat insulating material 41. In FIG. 7 (a), voids are formed at both ends inside the vacuum heat insulating material 41, but in FIG. 7 (b), voids are not formed. The voids may or may not be formed due to the difference in the manufacturing method of the vacuum heat insulating material 41.

As the core material 41a, a material used as a core material of a known vacuum heat insulating material that has been conventionally used can be used. For example, a powder such as silica, a foam such as urethane polymer, a fiber body such as glass wool, etc. can be used. You may use the porous body of.

The exterior material 41b is a member that covers the outer periphery of the core material 41a, and a flexible sheet in which a core material, a heat welding layer, and a gas barrier layer are laminated in this order may be used. As the gas barrier layer, a metal foil, a thin-film deposition sheet in which a thin-film deposition layer is formed on one side of a resin sheet, or the like may be used. For the metal foil, for example, aluminum can be used. For the vapor deposition layer, for example, aluminum, aluminum oxide, or silicon oxide can be used.

(Disassembly and assembly of transport trolley)
Next, the operation when disassembling and assembling the transport trolley 10 will be described.

(Disassembly of transport trolley)
8 to 15 are diagrams illustrating each process when the transport trolley 10 is sequentially disassembled. 8 (a), 9 (a), 10 (a)-(c), 11 (a), 12 (a), 13 (a), 14 (a), 15 (A)-(c) are plan views of the transport trolley 10, respectively, and the display of the top panel 11 is omitted. 8 (b), 9 (b), 11 (b), 12 (b), 13 (b), and 14 (b) are front views showing the transport trolley 10.

First, as shown in FIGS. 8A and 8B, it is assumed that the six panels 11 to 16 of the transport trolley 10 are unfolded and assembled into a box shape and are in an unfolded state. At this time, a substantially rectangular parallelepiped accommodation space 20 is formed between the panels 11 to 16. Although not shown, a load such as food may be stored in the accommodation space 20.

Next, as shown in FIGS. 9A and 9B, by folding the front panel 12, the front panel 12 shifts from the unfolded state to the folded state.

During this period, first, as shown in FIG. 10A, the first front surface portion panel 12a, the second front surface portion panel 12b, and the third front surface portion panel 12c are folded in a folding screen shape. Specifically, the first front surface partial panel 12a rotates clockwise with respect to the first side surface panel 14 about the first front hinge member 22a. Further, the second front surface portion panel 12b rotates counterclockwise with respect to the first front surface portion panel 12a about the second front hinge member 22b. Further, the third front surface portion panel 12c rotates clockwise with respect to the second front surface portion panel 12b about the third front hinge member 22c in a plan view.

Subsequently, as shown in FIG. 10B, the first front surface portion panel 12a, the second front surface portion panel 12b, and the third front surface portion panel 12c overlap each other, and in this state, the first front hinge member 22a is centered. It rotates clockwise with respect to the first side panel 14 in a plan view.

After that, as shown in FIG. 10 (c), the first front surface portion panel 12a, the second front surface portion panel 12b, and the third front surface portion panel 12c that overlap each other move to the outer periphery of the first side frame 51. As a result, as shown in FIGS. 11A and 11B, the front panel 12 is in the folded state, and the front side of the transport trolley 10 is completely opened in the horizontal direction (X direction). When the load is stored in the storage space 20, the load may be taken out from the front side in this state.

Next, as shown in FIGS. 12A and 12B, by folding the bottom panel 16, the bottom panel 16 changes from the unfolded state to the folded state. During this time, the bottom panel 16 rotates counterclockwise with respect to the first side frame 51 about the bottom hinge member 26a. As a result, the bottom panel 16 is folded so as to overlap the inside of the first side frame 51 (plus side in the X direction), and is located around the inside of the first side frame 51. That is, the bottom panel 16 is arranged perpendicular to the horizontal plane (XY plane) (parallel to the YZ plane). In this case, the bottom panel 16 is attached to the first side frame 51 via the hook-and-loop fastener (detachable member) 26b.

Next, as shown in FIGS. 13 (a) and 13 (b), by folding the bottom plate 58, the bottom plate 58 changes from the unfolded state to the folded state. During this time, the bottom plate 58 rotates clockwise with respect to the second side frame 52 in a front view, is folded so as to overlap the inside of the second side frame 52 (minus side in the X direction), and the second side frame 52 Located around the inside. That is, the bottom plate 58 is arranged perpendicular to the horizontal plane (XY plane) (parallel to the YZ plane). In this case, the bottom plate 58 is attached to the second side frame 52 by a fixing means (not shown).

Subsequently, as shown in FIGS. 14A and 14B, by folding the top panel 11, the top panel 11 changes from the unfolded state to the folded state. During this time, the surface fastener 21b is removed, so that the second top surface portion panel 11b is separated from the first top surface portion panel 11a, and the front surface of the second top surface portion panel 11c is centered on the top surface hinge member 21a. It rotates counterclockwise visually. As a result, the second top surface portion panel 11b is folded downward and is arranged so as to hang down from the third top surface portion panel 11c. At this time, the second top surface partial panel 11b is arranged around the inside of the second side frame 52 and inside (minus side in the X direction) with respect to the bottom plate 58.

Next, as shown in FIGS. 15 (a) to 15 (c), by folding the back panel 13, the back panel 13 changes from the unfolded state to the folded state.

During this period, first, as shown in FIGS. 15A and 15B, the first back surface partial panel 13a rotates counterclockwise with respect to the first side surface panel 14 about the second back surface hinge member 23b. .. Further, the second back surface partial panel 13b rotates clockwise with respect to the first back surface partial panel 13a about the first back surface hinge member 23a in a plan view. As a result, the second back surface partial panel 13b is folded so as to overlap the first back surface partial panel 13a, and is arranged inside the first back surface partial panel 13a (minus side in the Y direction). Further, as shown in FIG. 15 (c), the first back surface partial panel 13a rotates clockwise with respect to the first side surface panel 14 about the second back surface hinge member 23b, whereby the second back surface panel 13a is rotated. 1 The back surface partial panel 13a is returned to the same position as in the expanded state (FIG. 15A).

By removing the second back surface partial panel 13b in this way, the back panel 13 is opened by a predetermined width W1. On the other hand, the portion where the first back surface partial panel 13a and the second back surface partial panel 13b overlap is covered without being opened.

In this way, all the six panels 11 to 16 of the transport trolley 10 are in the folded state. At this time, the first panel group G1 and the second panel group G2 are formed around the first side frame 51 and the second side frame 52, respectively.

As described above, when the transport trolley 10 is not used, the panels 11 to 16 can be folded and stored and transported with the total volume as small as possible.

(Assembly of transport trolley)
The method of assembling the transport trolley 10 can be performed in the reverse order of the above-mentioned disassembly method.
That is, first, the reverse work of FIGS. 15 (a), (b), and (c) is started, and the back panel 13 is changed from the folded state to the unfolded state. Next, as the reverse work of FIGS. 14 (a) and 14 (b), the top panel 11 is changed from the folded state to the unfolded state, and then, as the reverse work of FIGS. 13 (a) and 13 (b), the bottom plate 58 is unfolded from the folded state. Make it a state. Subsequently, as the reverse work of FIGS. 12 (a) and 12 (b), the bottom panel 16 is changed from the folded state to the unfolded state, and finally, as the reverse work of FIGS. 9 to 11, the front panel 12 is changed from the folded state to the unfolded state. By doing so, the assembly work is completed.

(Nesting of transport trolley)
Next, the operation when nesting the transport trolley 10 will be described. 16 (a)-(c) are plan views explaining the operation when the transport carriage 10 is nested. In addition, in FIGS. 16 (a)-(c), the display of the 1st top surface partial panel 11a and the 3rd top surface partial panel 11c is omitted.

First, as shown in FIG. 16A, a transport trolley 10 (first transport trolley 10) in which all six panels 11 to 16 are in a folded state is prepared.

Next, as shown in FIG. 16B, another transport trolley 10A (second transport trolley 10A) in the folded state is prepared. The second transport trolley 10A has the same configuration as the first transport trolley 10. Next, the second transport trolley 10A is brought closer to the first transport trolley 10 from the front side (minus side in the Y direction) of the first transport trolley 10 and overlapped with the first transport trolley 10. At this time, the first panel group G1 of the second transport trolley 10A is made as close as possible to the first panel group G1 of the first transport trolley 10. In this case, since the back panel 13 of the second transport trolley 10A is opened by a predetermined width W1, the second panel group G2 of the first transport trolley 10 is the back panel of the second transport trolley 10A. It does not interfere with 13.

Next, as shown in FIG. 16 (c), another transport trolley 10B (third transport trolley 10B) in the folded state is prepared. The third transport trolley 10B has the same configuration as the first transport trolley 10 and the second transport trolley 10A. Subsequently, the third transport trolley 10B is brought closer to the second transport trolley 10A from the front side (minus side in the Y direction) of the second transport trolley 10A, and the first transport trolley 10 and the second are carried. It is overlapped with the transport trolley 10A. At this time, the first panel group G1 of the third transport trolley 10B is made as close as possible to the first panel group G1 of the second transport trolley 10A. In this case, since the back panel 13 of the third transport trolley 10B is opened by a predetermined width W1, the second panel group G2 of the first transport trolley 10 and the second of the second transport trolley 10A The panel group G2 does not interfere with the back panel 13 of the third transport trolley 10B.

By the way, as described above, each of the back panels 13 of these transport carts 10, 10A and 10B is open by the width W1, and the width W1 is (n-1) in the horizontal direction (X direction). It has a length of × T or more. Here, as described above, T is the thickness of the thicker of the total thickness T1 of the first panel group G1 and the total thickness T2 of the second panel group G2 of the transport carts 10, 10A, and 10B. n is the maximum number of transport trolleys 10 that can be nested (3 in this case). In this way, by setting the width W1 of the open portion of the back panel 13 of the transport trolleys 10, 10A and 10B to (n-1) × T or more, n transport trolleys 10, 10A and 10B can be obtained. It is possible to reliably nest and accommodate these transport carts 10, 10A and 10B in a compact manner. Hereinafter, the reason why such a relationship is established will be described.

17 (a) and 17 (b) are plan views schematically showing the nested transport trolleys 10, 10A and 10B, and for convenience, the back panels 13 and the first panel of the transport trolleys 10, 10A and 10B are shown. Only the group G1 and the second panel group G2 are shown. Further, it is assumed that the transport carts 10, 10A, and 10B are closely adhered and nested along the X direction without any gap. In FIGS. 17A and 17B, the first transport trolley 10 is shown by a solid line, the second transport trolley 10A is shown by a broken line, and the third transport trolley 10B is shown by a two-dot chain line. There is.

FIG. 17A shows a case where the total thickness T1 of the first panel group G1 of each of the transport carts 10, 10A and 10B is larger than the total thickness T2 of the second panel group G2. That is, T1 = T. Further, the total length (length in the X direction) of each of the transport carts 10, 10A and 10B is La, and the width of the back panel 13 (length in the X direction) is W2. At this time, paying attention to the first transport trolley 10 in FIG. 17A, the relationship of La = T + W2 + W1 + T2 (Equation 1) is established (see the upper side of FIG. 17A). On the other hand, focusing on the nested n (3) transport carts 10, 10A and 10B, the relationship of La = n × T + W2 + T2 (Equation 2) is established (see the lower side of FIG. 17 (a)). By the above equations 1 and 2, the relationship W1 = (n-1) × T can be obtained. Therefore, if W1 is (n-1) × T or more, it is possible to nest n transport carts 10, 10A, and 10B.

FIG. 17B shows a case where the total thickness T2 of the second panel group G2 of each of the transport carts 10, 10A and 10B is larger than the total thickness T1 of the first panel group G1. That is, T2 = T. In this case, paying attention to the third transport trolley 10B in FIG. 17B, the relationship of La = T1 + W2 + W1 + T (Equation 3) is established (see the upper side of FIG. 17B). On the other hand, focusing on the nested n (3) transport carts 10, 10A and 10B, the relationship of La = T1 + W2 + n × T (Equation 4) is established (see the lower side of FIG. 17 (b)).
By the above equations 3 and 4, the relationship W1 = (n-1) × T can be obtained. Therefore, if W1 is (n-1) × T or more, it is possible to nest n transport carts 10, 10A, and 10B.

As described above, according to the present embodiment, the thickness of the thicker of the total thickness T1 of the first panel group G1 and the total thickness T2 of the second panel group G2 is T, and the number of transporting carts 10 that can be nested. When n is, the back panel 13 is opened in the horizontal direction by a width of (n-1) × T or more. As a result, the other transport trolleys 10 do not interfere with the back panel 13, and n transport trolleys 10 can be reliably nested. As a result, a plurality of transport carts 10 can be compactly stored when not in use.

Further, according to the present embodiment, the plurality of panels 11 to 16 can be in an unfolded state in which they are unfolded and assembled in a box shape, and in a folded state in which they can be nested with another transport trolley 10. As a result, by deploying the panels 11 to 16, it is possible to form a storage space 20 that can store a load and has high airtightness inside the panels 11 to 16. On the other hand, when the transport trolley 10 is not used, the panels 11 to 16 are folded and nested with other same transport trolleys 10 to compactly store these transport trolleys 10. be able to.

Further, according to the present embodiment, at least a part of each of the panels 11 to 16 is folded around the first side frame 51 or the second side frame 52, so that the first panel group including the first side frame 51 is included. A G1 and a second panel group G2 including the second side frame 52 are formed. As a result, the panels 11 to 16 can be easily folded, and the plurality of panels 11 to 16 can be compactly arranged around the first side frame 51 and the second side frame 52.

Further, according to the present embodiment, in the folded state, the first back surface partial panel 13a, which is a part of the back panel 13, remains on the back side without being folded. This simplifies the work of folding the back panel 13. Further, since it is possible to prevent the total thickness T1 of the first panel group G1 and the total thickness T2 of the second panel group G2 from becoming unnecessarily thick by the amount of the back surface partial panel 13a, it depends on the degree of the suppressed thickness. , The number of transporting trolleys 10 that can be nested can be increased.

Further, according to the present embodiment, since the trolley main body 50 has six wheels 61 to 66, it is possible to mount a heavy load or a large volume load on the transport trolley 10. Further, in such a 6-wheel elongated transport trolley 10, the panels 11 to 16 can be selectively expanded or folded.

Further, according to the present embodiment, each of the panels 11 to 16 includes a heat insulating panel, and the heat insulating panel includes the vacuum heat insulating material 41 or the foam heat insulating material. Since the vacuum heat insulating material 41 or the foam heat insulating material has good heat insulating performance even if it is thin, it is possible to improve the heat insulating property of the accommodation space 20 in the panels 11 to 16 and store the load in a cold or warm state. .. Further, by using the vacuum heat insulating material 41 or the foam heat insulating material, the panels 11 to 16 can be reduced in weight, the storage capacity of the transport trolley 10 in the deployed state can be increased, and the transport trolley in the folded state can be increased. 10 can be made compact. Further, since the total thickness T1 of the first panel group G1 and the total thickness T2 of the second panel group G2 can be reduced, the number of transportable carriages 10 that can be nested can be increased depending on the degree of the thinness. can.

Further, according to the present embodiment, the plurality of panels 11 to 16 include a top panel 11, a front panel 12, a back panel 13, a first side panel 14, a second side panel 15, and a bottom panel 16. And have. As a result, the accommodation space 20 is covered from all directions by the panels 11 to 16, so that the load in the accommodation space 20 can be protected from all directions.

Further, according to the present embodiment, the front panel 12 includes a plurality of foldable front partial panels 12a, 12b, 12c. As a result, by folding the front partial panels 12a, 12b, and 12c, the front side of the transport trolley 10 is opened, and it becomes easy to take out the load from the storage space 20 or store the load in the storage space 20. Further, the front portion panels 12a, 12b, and 12c can be compactly arranged around the outer side of the first side frame 51. In this case, the length of the front partial panels 12a, 12b, 12c in the width direction (Y direction in the folded state) is suppressed, and the front partial panels 12a, 12b, 12c pass through the narrow passage when the transport trolley 10 passes through the narrow passage. It prevents it from interfering with surrounding objects.

Further, according to the present embodiment, the carriage main body 50 further has a foldable bottom plate 58, and the bottom plate 58 is folded around the second side frame 52 to form the second panel group G2. As a result, the load of the load can be supported by the bottom plate 58 in the deployed state, and the transport trolley 10 can be nested by lifting the bottom plate 58 and arranging it around the second side frame 52 in the folded state. Can be in a good state.

(Modification example)
Next, various modifications of the transport trolley will be described.

In the above embodiment, the top panel 11 is composed of three top panel 11a, 11b, 11c, the front panel 12 is composed of three front panel 12a, 12b, 12c, and the rear panel 13 is 2. The case where the back surface partial panels 13a and 13b are composed is described as an example. However, the present invention is not limited to this, and for example, when the panels 11 to 13 are removable, the top panel 11, the front panel 12, and the back panel 13 may be composed of one panel. Alternatively, each panel 11 to 13 may be composed of a plurality of partial panels different from the above. Further, in the above embodiment, the case where the first side panel 14, the second side panel 15, and the bottom panel 16 are each composed of one panel has been described as an example, but the first side panel 14, the second side surface has been described. The panel 15 and the bottom panel 16 may be composed of a plurality of partial panels.

Further, in the above embodiment, the first panel group G1 includes the third front surface portion panel 12c, the second front surface portion panel 12b, the first front surface portion panel 12a, the first side surface panel 14, and the first side. The case where the second panel group G2 is composed of the second side surface panel 15, the second side frame 52, the bottom plate 58, and the second top surface partial panel 11b is composed of the frame 51 and the bottom panel 16. Explained for an example. However, each panel or partial panel may belong to either the first panel group G1 or the second panel group G2. Further, the case where the bottom plate 58 is folded around the second side frame 52 to form the second panel group G2 has been described as an example, but the present invention is not limited to this, and the bottom plate 58 is folded around the first side frame 51. Therefore, the first panel group G1 may be configured.

Further, in the above embodiment, the case where all the panels 11 to 16 are not separated from the carriage main body 50 in the folded state has been described as an example. However, the present invention is not limited to this, and some panels 11 to 16 may be removed from the carriage body 50 and separated in the folded state. For example, in the folded state, all or part of the top panel 11 may be removed and stored in a place different from the transport trolley 10. In this case, the total thickness T1 of the first panel group G1 and the total thickness T2 of the second panel group G2 can be reduced.

Further, in the above embodiment, the case where the six panels 11 to 16 include a heat insulating panel has been described as an example, but the present invention is not limited to this, and the panels 11 to 16 do not necessarily have the heat insulating property. For example, by forming each of the panels 11 to 16 from a transparent or opaque thin plate, it is possible to prevent the load contained in the accommodation space 20 from falling. Further, by making each of the panels 11 to 16 an opaque thin plate, it is possible to blindfold the load accommodated in the accommodation space 20 so that it cannot be visually recognized from the outside.

Further, in the above embodiment, the case where the front panel 12 is completely opened in the horizontal direction (X direction) in the folded state has been described as an example. However, the present invention is not limited to this, and a part of the front panel 12 may remain on the front side (minus side in the Y direction) without being folded as long as it does not hinder the nesting of the transport carriage 10. In this case, the total thickness T1 of the first panel group G1 and the total thickness T2 of the second panel group G2 can be reduced.

Further, in the above embodiment, the case where the bottom panel 16 is provided has been described as an example, but the present invention is not limited to this, and the bottom panel 16 may not be provided. In this case, the accommodation space 20 may be formed by the top panel 11, the front panel 12, the back panel 13, the first side panel 14, the second side panel 15, and the bottom plate 58. Further, the bottom plate 58 may be provided with heat insulating properties, for example, by spraying a heat insulating material on the bottom plate 58 without providing the bottom panel 16. In this case, since the work of moving the bottom panel 16 becomes unnecessary, the workability of the work of folding or unfolding the panels 11 to 15 is improved. Further, the total thickness T1 of the first panel group G1 and the total thickness T2 of the second panel group G2 can be reduced.

Further, in the above embodiment, the case where the first front surface portion panel 12a, the second front surface portion panel 12b, and the third front surface portion panel 12c of the front panel 12 are arranged outside the first side frame 51 is taken as an example. explained. However, not limited to this, as shown in FIG. 18, the first front surface portion panel 12a, the second front surface portion panel 12b, and the third front surface portion panel 12c of the front panel 12 are arranged inside the first side frame 51. May be. In this case, the front panel 12 further has a fourth front portion panel 12d fixed to the first side panel 14 or the first side frame 51. The first front surface portion panel 12a is foldably attached to the fourth front surface portion panel 12d. In FIG. 18, the display of the first top surface partial panel 11a and the third top surface partial panel 11c is omitted.

Further, as shown in FIG. 19, removable intermediate shelves 59 may be provided on the first side frame 51 and the second side frame 52 of the carriage body 50. The intermediate shelf 59 has a rectangular shape in a plan view and extends along the longitudinal direction (X direction) of the connecting member 53. By providing such an intermediate shelf 59, the load can be arranged and arranged inside the accommodation space 20. The intermediate shelf 59 is detachably attached to the cross rail 56 of the first side frame 51 and the cross rail 56 of the second side frame 52. That is, in the expanded state, the intermediate shelf 59 is arranged between the first side frame 51 and the second side frame 52. On the other hand, in the folded state, the intermediate shelf 59 is removed from the first side frame 51 and the second side frame 52 and stored separately from the carriage main body 50. In this case, the intermediate shelf 59 can be attached to any of the plurality of cross rails 56 provided in the height direction (Z direction). Not limited to this, the intermediate shelf 59 may be separable, for example, in a part of the longitudinal direction (X direction) thereof. In this case, in the folded state, a part of the pair of intermediate shelves 59 separated from each other may be folded around the inside of the first side frame 51 and the second side frame 52, respectively. Further, the number of intermediate shelves 59 is not limited to one, and a plurality of intermediate shelves 59 may be provided.

(Second embodiment)
Next, a second embodiment will be described with reference to FIGS. 20 to 35. 20 to 35 are views showing a second embodiment. The second embodiment shown in FIGS. 20 to 35 mainly has different configurations of the panels 11 to 16, and the other configurations are substantially the same as those of the first embodiment described above. In FIGS. 20 to 35, the same parts as those shown in FIGS. 1 to 19 are designated by the same reference numerals, and detailed description thereof will be omitted. In the following, the differences from the first embodiment will be mainly described.

As shown in FIGS. 20 to 22, the transport trolley 10 according to the present embodiment has a trolley main body 50 and a plurality of panels 11 to 16 (six) provided to be freely expandable and foldable with respect to the trolley main body 50, respectively. It is equipped with panels 11 to 16). Of these, the configuration of the bogie body 50 is substantially the same as in the case of the first embodiment.

(Panel configuration)
Next, the configurations of the panels 11 to 16 will be described. The panels 11 to 16 are provided to be freely unfoldable and foldable with respect to the bogie body 50 as a whole, and are unfolded and assembled into a box shape (FIG. 20) and a folded state (FIG. 22) that can be nested. ) And can be taken. Further, FIG. 21 shows a case where only the front panel 12 of the panels 11 to 16 is in the folded state.

As shown in FIG. 20, the panels 11 to 16 include a top panel 11, a front panel 12, a back panel 13, a first side panel 14, a second side panel 15, and a bottom panel 16. There is. In the unfolded state, it is possible to form a storage space 20 for accommodating a load by being surrounded by the six panels 11 to 16.

Next, the configuration of each of the panels 11 to 16 will be further described.

(Top panel)
The top panel 11 is arranged above the first side frame 51, the second side frame 52, the first side surface panel 14, and the front panel 12 in the unfolded state (FIG. 20). Further, the top panel 11 is arranged on the front side (minus side in the Y direction) of the back panel 13, and is arranged on the first side surface side (minus side in the X direction) of the second side surface panel 15.

The top panel 11 has a structure that can be partially opened and closed, and is located on the first top surface partial panel 11a located on the first side frame 51 side and on the second side frame 52 side, and also on the first top surface. It has a second top surface partial panel 11b, which is larger than the partial panel 11a. Of these, the first top surface partial panel 11a is foldably attached to the first side surface panel 14 via the first top surface hinge member 21c (see FIGS. 24 (a)-(c)). Further, the second top surface portion panel 11b is foldably attached to the first top surface portion panel 11a via the second top surface hinge member 21d (see FIGS. 24 (a)-(c)). .. Further, the second top surface portion panel 11b is detachably attached to the second side surface panel 15 via a hook-and-loop fastener (detachable member) (not shown).

The first top surface partial panel 11a and the second top surface partial panel 11b are both arranged horizontally (parallel to the XY plane) in the unfolded state (FIG. 20). Further, in the folded state (FIG. 22), the first top surface portion panel 11a is arranged horizontally, while the second top surface portion panel 11b is folded downward and from the first top surface portion panel 11a. Arranged to hang down. At this time, the second top surface partial panel 11b is arranged around the inside of the first side frame 51 and is parallel to the YZ plane.

(Front panel)
The front panel 12 is a panel located below the top panel 11 and above the bottom panel 16 and on the front side (minus side in the Y direction) of the back panel 13 in the unfolded state (FIG. 20). , Arranged perpendicular to the horizontal plane (XY plane) (parallel to the ZX plane).

The front panel 12 has a foldable structure, and is located on the first front portion panel 12a located on the first side frame 51 side, the second front portion panel 12b located in the middle, and the second side frame 52 side. It has a third front surface partial panel 12c. Of these, the first front surface partial panel 12a is foldably attached to the first side surface panel 14 via the first front hinge member 22a (see FIGS. 23 (a)-(c)). Further, the second front surface portion panel 12b is foldably attached to the first front surface portion panel 12a via the second front hinge member 22b (see FIGS. 23 (a)-(c)). Further, the third front surface portion panel 12c is foldably attached to the second front surface portion panel 12b via the third front hinge member 22c (see FIGS. 23 (a)-(c)). The third front surface portion panel 12c is detachably attached to the second side surface panel 15 via, for example, a hook-and-loop fastener (detachable member) (not shown).

The first front part panel 12a, the second front part panel 12b, and the third front part panel 12c are both arranged perpendicular to the horizontal plane (XY plane) (parallel to the ZX plane) in the unfolded state (FIG. 20). To. Further, the width (length in the X direction) of the first front portion panel 12a is shorter than the width (length in the X direction) of the second front portion panel 12b and the third front portion panel 12c, and the second front portion panel The width (length in the X direction) of 12b is substantially the same as the width (length in the X direction) of the third front surface portion panel 12c. On the other hand, in the folded state (FIG. 22), the first front surface portion panel 12a is located on the front side (minus side in the Y direction) of the first side surface panel 14. Further, the second front surface portion panel 12b and the third front surface portion panel 12c are folded so as to overlap each other, and further rotate around a vertical axis (Z direction axis) to the outside of the first side surface panel 14 (minus in the X direction). Placed on the side). At this time, the second front portion panel 12b and the third front portion panel 12c are folded and arranged around the outer side of the first side frame 51, and are parallel to the YZ plane.

(Back panel)
The back panel 13 is located on the back side (plus side in the Y direction) of the top panel 11, the front panel 12, the first side panel 14, the second side panel 15, and the bottom panel 16 in the expanded state (FIG. 20). It is a panel and is arranged perpendicular to the horizontal plane (XY plane) (parallel to the ZX plane).

The back panel 13 has a foldable structure and has a first back surface partial panel 13a located on the first side frame 51 side and a second back surface partial panel 13b located on the second side frame 52 side. There is. Of these, the second back surface partial panel 13b is foldably attached to the first back surface partial panel 13a via the first back surface hinge member 23a (see FIGS. 25 (a)-(c)). Further, the second back surface partial panel 13b is detachably attached to the second side surface panel 15 via, for example, a hook-and-loop fastener (detachable member) (not shown). Further, the first back surface partial panel 13a is fixed to the first side surface panel 14.

The first back surface partial panel 13a and the second back surface partial panel 13b are both arranged perpendicular to the horizontal plane (XY plane) (parallel to the ZX plane) in the unfolded state (FIG. 20). On the other hand, in the folded state (FIG. 22), the second back surface partial panel 13b is folded so as to overlap the first back surface partial panel 13a, and is arranged outside (plus side in the Y direction) from the first back surface partial panel 13a. To. At this time, the first back surface partial panel 13a remains on the back side without being folded. That is, the first back surface partial panel 13a is in the same position as in the unfolded state even in the folded state, and is arranged perpendicular to the horizontal plane (XY plane) (parallel to the ZX plane).
Further, the first back surface partial panel 13a and the second back surface partial panel 13b are folded and arranged perpendicular to the first side frame 51, and are parallel to the ZX plane. In this way, in the folded state, the back panel 13 is opened by removing the second back panel 13b. The portion where the back panel 13 is opened has a predetermined width W1 in the horizontal direction (X direction) (FIG. 22).

(1st side panel)
The first side surface panel 14 is a panel located on the first side frame 51 side (minus side in the X direction) in both the expanded state (FIG. 20) and the folded state (FIG. 22), with respect to a horizontal plane (XY plane). Arranged vertically (parallel to the YZ plane). The configuration of the first side panel 14 is substantially the same as that of the first embodiment.

(Second side panel)
The second side surface panel 15 is a panel located on the second side frame 52 side (plus side in the X direction) in both the expanded state (FIG. 20) and the folded state (FIG. 22), with respect to the horizontal plane (XY plane). Arranged vertically (parallel to the YZ plane). The configuration of the second side panel 15 is substantially the same as that of the first embodiment.

(Bottom panel)
The bottom panel 16 is a panel located on the bottom side (minus side in the Z direction) in the expanded state (FIG. 20), and is arranged parallel to the horizontal plane (XY plane). Further, in the deployed state, the bottom panel 16 is arranged on the bottom plate 58 of the carriage body 50 and between the first side frame 51 and the second side frame 52. The configuration of the bottom panel 16 is substantially the same as that of the first embodiment.

As shown in FIG. 21, rectangular parallelepiped gap panels 17 are provided around the bottom portions (minus side in the Z direction) of the first side frame 51 and the second side frame 52, respectively. The gap panel 17 closes the gap between the bottom panel 16 and the first side panel 14 or the second side panel 15, whereby the heat insulating property of the accommodation space 20 can be further improved.

FIG. 22 shows the case where the panels 11 to 16 are in the folded state. As shown in FIG. 22, in the folded state, at least a part of each of the panels 11 to 16 is folded around the first side frame 51 or the second side frame 52, respectively.

That is, around the first side frame 51, in order from the outside (minus side in the X direction), the second front portion panel 12b, the third front portion panel 12c, the first side panel 14, the bottom panel 16, and the first. The two top surface partial panels 11b overlap with each other. The first side frame 51 is located between the first side panel 14 and the bottom panel 16. Further, around the second side frame 52, the second side surface panel 15 and the bottom plate 58 are overlapped in order from the outside (plus side in the X direction). The second side frame 52 is located between the second side panel 15 and the bottom plate 58.

In this case, the first panel group G1 and the second panel group G2 are formed around the first side frame 51 and the second side frame 52, respectively. Of these, the first panel group G1 includes a second front partial panel 12b, a third front partial panel 12c, a first side panel 14, a first side frame 51, a bottom panel 16, and a second top surface partial panel. It is composed of 11b. Further, the second panel group G2 is composed of a second side surface panel 15, a second side frame 52, and a bottom plate 58.

As in the case of the first embodiment, the thickness of the thicker of the total thickness T1 of the first panel group G1 and the total thickness T2 of the second panel group G2 is T, and the nestable transport trolley 10 is used. Let the number be n. In this case, the open width W1 of the back panel 13 described above has a length of (n-1) × T or more in the horizontal direction (X direction).

(Disassembly of transport trolley)
Next, the action when disassembling the transport trolley 10 will be described. 23 to 25 are diagrams illustrating a part of a process of sequentially disassembling the transport trolley 10.

First, as shown in FIG. 20, it is assumed that the six panels 11 to 16 of the transport trolley 10 are unfolded and assembled in a box shape (deployed state). At this time, a substantially rectangular parallelepiped accommodation space 20 is formed between the panels 11 to 16.

Next, as shown in FIG. 21, by folding the front panel 12, the front panel 12 shifts from the unfolded state to the folded state.

During this time, first, as shown in FIG. 23A, the third front surface portion panel 12c is folded so as to overlap the second front surface portion panel 12b. Specifically, the third front surface portion panel 12c rotates clockwise with respect to the second front surface portion panel 12b about the third front hinge member 22c in a plan view.

Subsequently, as shown in FIG. 23B, the second front surface portion panel 12b and the third front surface portion panel 12c overlap each other, and in this state, the first front surface portion panel 12a centering on the second front hinge member 22b. It rotates clockwise with respect to the plan view.

After that, as shown in FIG. 23 (c), the second front surface portion panel 12b and the third front surface portion panel 12c move to the outer periphery of the first side frame 51. Specifically, the first front surface partial panel 12a rotates clockwise with respect to the first side surface panel 14 about the first front hinge member 22a. At this time, the first front surface portion panel 12a is located on the front side (minus side in the Y direction) with respect to the first side surface panel 14, and the second front surface portion panel 12b and the third front surface portion panel 12c are on the first side. It is located on the outside (minus side in the X direction) with respect to the frame 51. In this way, as shown in FIG. 21, the front panel 12 is in the folded state, and the front side of the transport trolley 10 is completely opened in the horizontal direction (X direction).

Next, by folding the bottom panel 16 in the same manner as in the case of the first embodiment, the bottom panel 16 is changed from the unfolded state to the folded state. During this time, the bottom panel 16 rotates counterclockwise with respect to the first side frame 51 in front view. As a result, the bottom panel 16 is located around the inside of the first side frame 51.

Then, by folding the bottom plate 58 in the same manner as in the case of the first embodiment, the bottom plate 58 is changed from the unfolded state to the folded state. During this time, the bottom plate 58 rotates clockwise with respect to the second side frame 52 in a front view, is folded so as to overlap the inside of the second side frame 52 (minus side in the X direction), and the second side frame 52 Located around the inside.

Subsequently, as shown in FIGS. 24A to 24C, by folding the top panel 11, the top panel 11 changes from the unfolded state to the folded state.

During this period, first, as shown in FIGS. 24A and 24B, the first top surface portion panel 11a is counterclockwise with respect to the first side surface panel 14 centering on the first top surface hinge member 21c. The second top surface portion panel 11b rotates clockwise with respect to the first top surface portion panel 11a about the second top surface hinge member 21d.

Subsequently, as shown in FIG. 24 (c), the second top surface partial panel 11b moves around the inside of the first side frame 51. Specifically, the first top surface partial panel 11a rotates clockwise with respect to the first side surface panel 14 about the first top surface hinge member 21c, and the second top surface partial panel 11b is rotated. It rotates clockwise with respect to the first top surface partial panel 11a about the second top surface hinge member 21d. As a result, the second top surface portion panel 11b is folded downward and is arranged so as to hang down from the first top surface portion panel 11a. At this time, the second top surface portion panel 11b is arranged around the inside of the first side frame 51 and inside (plus side in the X direction) with respect to the bottom surface panel 16.

Next, as shown in FIGS. 25 (a) and 25 (b), by folding the back panel 13, the back panel 13 changes from the unfolded state to the folded state.

During this period, first, as shown in FIGS. 25 (a) and 25 (b), the second back surface partial panel 13b rotates counterclockwise with respect to the first back surface partial panel 13a about the first back surface hinge member 23a. do. As a result, the second back surface partial panel 13b is folded so as to overlap the first back surface partial panel 13a, and is arranged on the outside (plus side in the Y direction) of the first back surface partial panel 13a. On the other hand, the first back surface partial panel 13a maintains the same position as the unfolded state even in the folded state.

In this way, all the six panels 11 to 16 of the transport carriage 10 are in a folded state, and the first panel group G1 and the second panel group are around the first side frame 51 and the second side frame 52, respectively. G2 is formed.

(Assembly of transport trolley)
The method of assembling the transport trolley 10 can be performed in the reverse order of the above-mentioned disassembly method.
That is, first, the reverse operation of FIGS. 25 (a) and 25 (b) is started, and the back panel 13 is changed from the folded state to the unfolded state. Next, as the reverse operation of FIGS. 24 (a) to 24 (c), the top panel 11 is changed from the folded state to the unfolded state. Next, the bottom plate 58 and the bottom panel 16 are changed from the folded state to the unfolded state, and finally, as the reverse work of FIGS. 23 (a)-(c), the front panel 12 is changed from the folded state to the unfolded state. Is completed.

By the way, in the present embodiment, the case where the bottom panel 16 is composed of one plate-shaped member has been described as an example, but the present invention is not limited to this, and the bottom panel 16 is composed of a plurality (two) partial bottom panels. You may be.

For example, as shown in FIGS. 26 (a)-(c), the bottom panel 16 has a first bottom surface portion panel 16a located on the first side frame 51 side and a second bottom surface portion located on the second side frame 52 side. It has a panel 16b and. Of these, the first bottom surface partial panel 16a is foldably attached to the first side surface panel 14 via a first bottom surface hinge member 26c made of, for example, a play cloth or the like. Further, the second bottom surface portion panel 16b is foldably attached to the first bottom surface portion panel 16a via the second bottom surface hinge member 26d. Further, the second bottom surface portion panel 16b is detachably attached to the second side surface panel 15 via a hook-and-loop fastener (detachable member) (not shown).

The first bottom surface portion panel 16a and the second bottom surface portion panel 16b are both arranged horizontally (parallel to the XY plane) in the unfolded state. On the other hand, in the folded state, the second bottom surface portion panel 16b is folded so as to overlap the first bottom surface portion panel 16a. At this time, the first bottom surface portion panel 16a and the second bottom surface portion panel 16b are arranged around the inside of the first side frame 51 and are parallel to the YZ plane.

When the bottom panel 16 is folded, first, as shown in FIGS. 26 (a) and 26 (b), the first bottom surface partial panel 16a is counterclockwise to the first side surface panel 14 with the first bottom surface hinge member 26c as the center. Rotate clockwise. Further, the second bottom surface portion panel 16b rotates clockwise with respect to the first bottom surface portion panel 16a about the second bottom surface hinge member 26d. After that, as shown in FIG. 26 (c), the first bottom surface portion panel 16a and the second bottom surface portion panel 16b are arranged around the inside of the first side frame 51 in an overlapping state.

In the present embodiment, the panels 11 to 14, 16 and 17 are detachably attached to other panels. Specifically, the front panel 12 and the first side panel 14 are detachably attached to each other, and the back panel 13 and the first side panel 14 are detachably attached to each other. Further, the top panel 11 and the first side panel 14 are detachably attached to each other. Further, the bottom panel 16 and the gap panel 17 are detachably attached to each other.

Hereinafter, a configuration for detachably attaching the panels 11 to 14, 16 and 17 will be described with reference to FIGS. 27 to 33.

As shown in FIG. 27 (a), the first front surface portion panel 12a of the front panel 12 is provided with a convex sandwiched portion 28a protruding toward the first side surface panel 14. Further, the first side surface panel 14 is provided with a concave sandwiching portion 29a that sandwiches the sandwiched portion 28a. The front panel 12 is attached to the first side surface panel 14 by sandwiching the sandwiched portion 28a in the sandwiching portion 29a. On the other hand, the front panel 12 is removed from the first side surface panel 14 by pulling the sandwiched portion 28a away from the sandwiched portion 29a.
In this way, the front panel 12 and the first side panel 14 are detachably attached to each other.

As shown in FIG. 27B, when the front panel 12 is changed from the expanded state to the folded state, the first front partial panel 12a rotates clockwise with respect to the first side panel 14 in a plan view. Also in this case, since the sandwiched portion 28a provided on the first front surface portion panel 12a is firmly sandwiched by the sandwiched portion 29a provided on the first side surface panel 14, the first front surface portion panel 12a is the first. It does not come off from the side panel 14.

FIG. 28 (a) is an enlarged view showing a mounting portion between the first front surface portion panel 12a and the first side surface panel 14. As shown in FIG. 28A, the sandwiched portion 28a provided on the first front surface portion panel 12a has a hook portion 31a of a hook-and-loop fastener. Further, the sandwiching portion 29a provided on the first side surface panel 14 has a loop portion 31b of a hook-and-loop fastener. By attaching and detaching the hook portion 31a of the sandwiched portion 28a and the loop portion 31b of the sandwiching portion 29a, the first front surface portion panel 12a and the first side surface panel 14 are detachably attached to each other. Of the first front surface partial panel 12a, the area A1 on the first side surface panel 14 side is provided with the loop portion 31b of the hook-and-loop fastener, and the sandwiched portion 28a is the first front surface portion panel 12a in this area A1. It is detachably attached to. As a result, when the front panel 12 shifts from the expanded state to the folded state, the first front portion panel 12a can be smoothly rotated and moved to the front side (minus side in the Y direction) of the first side panel 14 (FIG. FIG. 27 (b)).

As shown in FIG. 28B, the sandwiching portion 29a has a loop portion 31b of the hook-and-loop fastener. Therefore, when the front panel 12 is removed, the loop portions 31b of the sandwiching portions 29a do not adhere to each other and the sandwiching portions 29a are not blocked. However, the present invention is not limited to this, and the sandwiched portion 28a may have the loop portion 31b of the hook-and-loop fastener.

As shown in FIG. 29, the sandwiched portion 28a may be provided on the first side surface panel 14, and the sandwiched portion 29a may be provided on the first front surface portion panel 12a to sandwich the sandwiched portion 28a.

As shown in FIG. 30, the first side surface panel 14 is provided with a convex sandwiched portion 28b protruding toward the back panel 13. Further, the first back surface portion panel 13a of the back panel 13 is provided with a concave sandwiching portion 29b that sandwiches the sandwiched portion 28b. The first side surface panel 14 is attached to the back panel 13 by the sandwiched portion 28b being sandwiched between the sandwiched portions 29b. On the other hand, the first side surface panel 14 is removed from the back panel 13 by pulling the sandwiched portion 28b away from the sandwiching portion 29b. In this way, the back panel 1 and the first side panel 14 are detachably attached to each other.

In this case, the sandwiching portion 29b has a loop portion of the hook-and-loop fastener, and the sandwiched portion 28b has a hook portion of the hook-and-loop fastener. However, the present invention is not limited to this, and the sandwiched portion 29b may have a hook portion and the sandwiched portion 28b may have a loop portion. Further, the sandwiching portion 29b may be provided on the first side surface panel 14, and the sandwiched portion 28b may be provided on the first back surface portion panel 13a.

As shown in FIG. 31, the first side surface panel 14 is provided with a convex sandwiched portion 28c protruding toward the top panel 11. Further, the first top surface portion panel 11a of the top surface panel 11 is provided with a concave sandwiching portion 29c that sandwiches the sandwiched portion 28c. The first side surface panel 14 is attached to the top panel 11 by sandwiching the sandwiched portion 28c in the sandwiching portion 29c. On the other hand, the first side surface panel 14 is removed from the top panel 11 by pulling the sandwiched portion 28c away from the sandwiching portion 29c. In this way, the top panel 11 and the first side panel 14 are detachably attached to each other.

In this case, the sandwiching portion 29c has a loop portion of the hook-and-loop fastener, and the sandwiched portion 28c has a hook portion of the hook-and-loop fastener. However, the present invention is not limited to this, and the sandwiched portion 29c may have a hook portion and the sandwiched portion 28c may have a loop portion. Further, the sandwiching portion 29c may be provided on the first side surface panel 14, and the sandwiched portion 28c may be provided on the first top surface portion panel 11a.

As shown in FIG. 32, the bottom panel 16 is provided with a convex sandwiched portion 28d protruding toward the gap panel 17. Further, the gap panel 17 is provided with a concave sandwiching portion 29d that sandwiches the sandwiched portion 28d. The bottom panel 16 is attached to the gap panel 17 by the sandwiched portion 28d being sandwiched between the sandwiched portions 29d. On the other hand, the bottom panel 16 is removed from the gap panel 17 by pulling the sandwiched portion 28d away from the sandwiching portion 29d.

In this case, the sandwiching portion 29d has a loop portion of the hook-and-loop fastener, and the sandwiched portion 28d has a hook portion of the hook-and-loop fastener. However, the present invention is not limited to this, and the sandwiched portion 29d may have a hook portion and the sandwiched portion 28d may have a loop portion. Further, the bottom panel 16 may be provided with the sandwiching portion 29d, and the gap panel 17 may be provided with the sandwiched portion 28d.

33 (a) and 33 (b) show the cross-sectional configurations of the panels 11 to 14, 16 and 17 shown in FIGS. 27 to 32.

As shown in FIGS. 33 (a) and 33 (b), the panels 11 to 14, 16 and 17 have a panel center portion 46 and a heat shield sheet 45 that encloses the panel center portion 46. Among them, the panel central portion 46 includes the vacuum heat insulating material 41, the foam heat insulating material 42, the heat insulating outer peripheral portion 43, and the heat insulating material protective member 44 (see FIG. 6). As shown in FIG. 33 (a), the sandwiched portions 28a to 28d are formed in a convex shape by projecting a part of the heat shield sheet 45 protruding from the panel center portion 46. Further, as shown in FIG. 33 (b), the sandwiching portions 29a to 29d are formed in a concave shape by bending a part of the heat shield sheet 45 protruding from the panel center portion 46.

By attaching the panels 11 to 14, 16 and 17 to each other in a detachable manner in this way, not only the trolley 10 including the panels 11 to 17 can be used, but also the trolley main body 50 from which the panels 11 to 17 are removed can be used independently. It can also be used in. Further, for example, when the trolley main body 50 and the panels 11 to 17 are manufactured at different places, the transport work of the trolley main body 50 and the panels 11 to 17 and the assembly work of the transport trolley 10 can be efficiently performed. Further, when the transport trolley 10 is not used and is stored for a long period of time, the panels 11 to 17 can be removed from the trolley main body 50.

In this embodiment, it is not always necessary that all of the panels 11 to 17 are detachably attached to the other panels 11 to 17 or the carriage body 50, and some of the panels 11 to 17 are other panels. It may be attached to 11 to 17 or the dolly body 50 so as not to be attached or detached. Further, also in the first embodiment described above, all or a part of the plurality of panels 11 to 16 may be detachably attached to each other as in the embodiment shown in FIGS. 27 to 33.

Hereinafter, modifications of the present embodiment will be described with reference to FIGS. 34 and 35. FIG. 34 (a) shows a state before the panels 13 and 14 are attached to the first side frame 51, and FIG. 34 (b) shows a state after the panels 13 and 14 are attached to the first side frame 51. Is shown. Further, FIG. 35 (a) shows a state before the panels 11 and 14 are attached to the first side frame 51, and FIG. 35 (b) shows a state after the panels 11 and 14 are attached to the first side frame 51. It shows the state.

As shown in FIG. 34 (a), the first back surface partial panel 13a of the back panel 13 has a first swing piece 71a and a second swing piece 71b. Of these, the first swing piece 71a extends from the end on the minus side in the X direction of the first back surface portion panel 13a. Further, the second swing piece 71b is located on the minus side in the Y direction of the first back surface portion panel 13a, and extends from the plus side in the X direction with respect to the first swing piece 71a. Surface fasteners 72a and 72b are attached to the first swing piece 71a and the second swing piece 71b, respectively. Further, adhesive members 73a and 73b such as tapes are attached to the second swing piece 71b and the first back surface partial panel 13a, respectively. Further, surface fasteners 72c and 72d are attached to the surface on the plus side in the X direction and the surface on the minus side in the X direction of the first side surface panel 14, respectively.

As shown in FIG. 34 (b), the adhesive members 73a and 73b of the back panel 13 are adhered to the first side frame 51, respectively, whereby the back panel 13 is fixed to the first side frame 51. Further, the hook-and-loop fastener 72a of the first swing piece 71a and the hook-and-loop fastener 72b of the second swing piece 71b are attached to the hook-and-loop fasteners 72d and 72c of the first side panel 14, respectively.
In this way, the back panel 13 and the first side panel 14 are detachably attached.

As shown in FIG. 35 (a), a third swing piece 71c and a fourth swing piece 71d are provided at the X-direction minus side end portion of the first top surface portion panel 11a of the top surface panel 11. There is. Surface fasteners 72e and 72f are attached to the third rocking piece 71c and the fourth rocking piece 71d, respectively. The hook-and-loop fasteners 72e and 72f are provided on the surfaces of the third rocking piece 71c and the fourth rocking piece 71d, respectively, facing each other. Further, a fifth rocking piece 71e is provided at the end on the positive side in the Z direction of the first side surface panel 14. Surface fasteners 72g and 72h are attached to both sides of the fifth rocking piece 71e.

As shown in FIG. 35 (b), when viewed from the front, the third swing piece 71c and the fourth swing piece 71d of the top panel 11 sandwich the fifth swing piece 71e of the first side panel 14. Rotate like.
At this time, the surface fastener 72e of the third rocking piece 71c and the surface fastener 72g of the fifth rocking piece 71e are attached to each other, and the surface fastener 72f of the fourth rocking piece 71d and the surface of the fifth rocking piece 71e are attached to each other. The fastener 72h and the fastener 72h are attached to each other. In this way, the top panel 11 and the first side panel 14 are detachably attached.

It is also possible to appropriately combine a plurality of components disclosed in the above-described embodiments and modifications as necessary. Alternatively, some components may be deleted from all the components shown in the above embodiments and modifications.

10 Transport trolley 11 Top panel 12 Front panel 13 Back panel 14 1st side panel 15 2nd side panel 16 Bottom panel 20 Accommodation space 40 Insulation 50 trolley body 51 1st side frame 52 2nd side frame 53 Connecting member 58 Bottom plate 61 1st wheel 62 2nd wheel 63 3rd wheel 64 4th wheel 65 5th wheel 66 6th wheel

Claims (2)

A transport trolley that can be nested with other transport trolleys,
A bogie body having a first side frame, a second side frame, and a connecting member for connecting the first side frame and the second side frame to each other.
It is provided with a plurality of panels provided so as to be expandable and foldable with respect to the bogie body.
The plurality of panels can be in an unfolded state in which the plurality of panels are unfolded in a box shape, and in a folded state in which the plurality of panels can be folded so as to be nestable with the other transport trolleys.
The plurality of panels include a top panel, a front panel, a back panel, a first side panel, a second side panel, and a bottom panel.
The back panel has a first back surface partial panel located on the first side frame side and a second back surface partial panel located on the second side frame side.
In the folded state, the first back surface partial panel remains on the back side without being folded, and the second back surface partial panel is folded so as to overlap the first back surface partial panel . The top panel has a structure that can be partially opened and closed.
The top panel has a first top panel and a second top panel that is foldably attached to the first top panel.
The transport trolley according to claim 1, wherein the second top surface partial panel is larger than the first top surface partial panel.

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