JP7385837B2 - Transportation trolley - Google Patents

Description

This embodiment relates to a transportation trolley that can be nested with other transportation trolleys.

2. Description of the Related Art Conventionally, for example, in stores, factories, etc., transportation trolleys have been used to transport loads such as food. Such a transportation trolley has a trolley body with a pair of side frames, and the trolley body is equipped with an insulating trolley cover to keep food and other loaded items warm, cool, or protected. It will be installed. As such a transportation trolley, for example, one disclosed in Patent Document 1 is known.

JP2013-233970A

However, the conventional truck cover for a transportation truck is made of, for example, sewn sheet material, and is generally thin and flexible (see Patent Document 1). For this reason, conventional truck covers have a problem in that it is difficult to sufficiently improve the heat insulation performance or to sufficiently protect the loaded items inside.

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

An object of the present disclosure is to provide a transportation truck whose panels can be easily folded and which can be nested with other transportation trucks.

The transportation truck according to the present embodiment is a transportation truck that can be nested with another transportation truck, and includes a first side frame, a second side frame, and the first side frame and the second side frame. a truck main body having a connecting member that connects the plurality of panels to each other, and a plurality of panels that are provided in a manner that can be expanded and folded with respect to the truck main body, and the plurality of panels are arranged so that the plurality of panels are box-shaped. The plurality of panels can be in an unfolded state and a folded state in which nesting with the other transportation trolley is possible by folding the plurality of panels, and in the folded state, at least a portion of each panel is in the first state. A first panel group including the first side frame and a second panel group including the second side frame are formed by being folded around the side frame or the second side frame, and the first panel group and the total thickness of the second panel group, where T is the thicker one, and n is the number of the transport trolleys that can be nested. The panel is open in the horizontal direction by a width of (n-1)×T or more.

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

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

In the transportation trolley according to this embodiment, each panel may include a heat insulating panel.

In the transportation trolley according to this embodiment, the heat insulation panel may include a vacuum heat insulation material or a foam heat insulation material.

In the transportation trolley according to the present embodiment, the plurality of panels include at least a top panel, a front panel, the back panel, a first side panel on the first side frame side, and a first side panel on the second side frame side. and a second side panel.

In the transportation trolley according to this embodiment, the plurality of panels may further include a bottom panel.

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

In the transportation trolley according to the present embodiment, the trolley body further includes a foldable bottom plate, and the bottom plate is folded around the first side frame or the second side frame so that the first The panel group or the second panel group may be configured.

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

In the transportation 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 that sandwiches the sandwiched portion, and the sandwiched portion and the A hook-and-loop fastener may be provided in each of the sandwiching portions.

In the transportation 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 nested with other transportation carts.

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

(First embodiment)
The first embodiment will be described below with reference to the drawings. Each figure shown below is shown schematically. Therefore, the size and shape of each part are appropriately exaggerated to facilitate understanding. Further, it is possible to implement the invention with appropriate changes within the scope of the technical concept. In each figure shown below, the same parts are given the same reference numerals, and some detailed explanations may be omitted. In addition, the numerical values such as dimensions and material names of each member described in this specification are examples of embodiments, and are not limited to these, and can be appropriately selected and used. In this specification, terms specifying shapes and geometrical conditions, such as terms such as parallel, perpendicular, and perpendicular, are not only meant strictly, but also include substantially the same state.

In addition, 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. This is the direction perpendicular to and parallel to the floor surface on which the transportation trolley is placed. The "Z direction" is a direction parallel to the vertical direction. In addition, "front" refers to the surface perpendicular to the floor, which faces the direction in which other transportation carts approach when nesting, and "back" refers to the surface perpendicular to the floor. A surface that faces the front. "Top surface" refers to the surface parallel to the floor and the upper side of the transportation trolley, and "bottom surface" refers to the surface parallel to the floor and the lower side of the transportation trolley. refers to the side of "Side surface" refers to a surface perpendicular to the floor surface, and refers to a surface on the longitudinal end side of the transportation trolley.

(Configuration of transportation trolley)
The configuration of the transportation trolley according to this embodiment will be explained using FIGS. 1 to 5. FIG. 1 is an exploded perspective view showing a state in which each panel of the transportation trolley according to the present embodiment is removed. FIG. 2 is a perspective view of the transportation trolley according to the present embodiment in an unfolded state. FIG. 3 is a perspective view of the transportation trolley according to the present embodiment in a folded state. FIG. 4 is a perspective view of the truck body. FIG. 5 is a partially enlarged front view of the truck body.

As shown in FIG. 1, the transportation truck 10 according to the present embodiment includes a truck body 50, and a plurality of (six in this case) panels 11 to 11 provided on the truck body 50 so as to be freely expandable and foldable. 16. Among these, a plurality of panels 11 to 16 are in an unfolded state in which they are unfolded and assembled into a box shape (see Fig. 2), and in a folded state in which they can be nested with other transportation carts by folding the plurality of panels 11 to 16. (See Figure 3).

The transportation trolley 10 is used, for example, in stores, factories, logistics processes, etc., when storing or transporting loaded items that need to be kept cool or warm. In such a transportation trolley 10, a storage space 20 (described later) capable of storing loaded items is surrounded by six panels 11 to 16, so that temperature changes inside the transportation trolley 10 are minimized. configured to be suppressed. On the other hand, when the transportation trolley 10 is not used, it is possible to store a plurality of transportation trolleys 10 compactly by nesting (overlapping them in a nested manner) with other identical transportation trolleys 10. be.

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

The first side frame 51 is provided at one end in the longitudinal direction (minus side end in the X direction) of the truck body 50, and protrudes upward from the connecting member 53 (towards the positive side in the Z direction). The first side frame 51 includes a lower support part 54 connected to the connecting member 53, an annular (rectangular) peripheral frame 55 connected to the lower support part 54, and a horizontal direction (Y) inside the peripheral frame 55. direction). The plurality of horizontal bars 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 (the positive end in the X direction) of the truck body 50, and projects upward from the connecting member 53 (to the positive side in the Z direction). 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 king-shaped shape in plan view (a shape in which two letters "E" are placed back to back), and is attached to a central frame 57 extending in the longitudinal direction (X direction) of the truck body 50 and to the central frame 57, respectively. It has three connected wheel mounting frames 67 to 69.

The central frame 57 is located approximately at the center of the truck body 50 in the width direction (Y direction). This central frame 57 has sufficient strength to hold the load of the transport trolley 10 and its load, but has a narrow width that does not interfere with nesting the transport trolleys 10 together. . Specifically, the width Wa (length in the Y direction) of the central frame 57 may be set to 5% or more and 33% or less of the maximum width Wb (length in the Y direction) of the truck body 50. Further, although the intervals Pa and Pb depend on the maximum width Wb of the truck body 50, they may be, for example, 20 mm or more and 200 mm or less.

The three wheel attachment frames 67 to 69 each extend 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. , and a third wheel mounting frame 69 located on the second side frame 52 side.

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

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

The second wheel attachment frame 68 is provided at the central portion of the central frame 57 in the longitudinal direction (the central portion in the X direction). A third wheel 63 and a fourth wheel 64 are attached to both longitudinal ends (both ends in the Y direction) of the second wheel attachment frame 68, respectively. The width (length in the X direction) Wc of the second wheel attachment frame 68 is narrow enough to not interfere with nesting the transportation carts 10 together. Specifically, the width Wc of the second wheel attachment frame 68 may be set to 3.7% or more and 12.6% or less of the maximum length (X-direction length) La of the truck 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 truck body 50.

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

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, as described above. Among these, the first wheel 61, the second wheel 62, the fifth wheel 65, and the sixth wheel 66 are free wheels, and each rotates along a horizontal axle and rotates in the vertical direction (Z direction). It can be rotated by the axis. On the other hand, the third wheel 63 and the fourth wheel 64 are fixed wheels, and while they each rotate along a horizontal axle, they cannot turn around a vertical axis (Z direction).

The wheels 61 to 66 are connected to the central fixed wheels (the third wheel 63 and the fourth wheel 64) in front and rear so that when the transport trolley 10 is loaded with a load and travels in a straight line, Either one of the free wheels (the first wheel 61 and the second wheel 62, or the fifth wheel 65 and the sixth wheel 66) may be combined to be grounded. In addition, when no load is placed on the transport trolley 10, the fixed wheels in the center (the third wheel 63 and the fourth wheel 64) are grounded to make turning and nesting easier, and to make it easier to turn in a small radius. Alternatively, only both the front and rear free wheels (first wheel 61, second wheel 62, fifth wheel 65, and sixth wheel 66) may be brought into contact with the ground. Note that the present invention is not limited to this, and the truck main body 50 may have four wheels 61, 62, 65, and 66, and may not have the second wheel attachment frame 68.

Furthermore, a foldable bottom plate 58 is provided on the connecting member 53. The bottom plate 58 has a substantially rectangular parallelepiped shape and 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 transverse direction (Y direction). It has substantially the same length as the second side frame 52. Further, the bottom plate 58 has sufficient strength to hold the load of the loaded object of the transportation trolley 10, and its thickness Ta 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 relative to the connecting member 53, and can be placed on the connecting member 53 in the unfolded state (see FIGS. 2 and 4) and lifted relative to the connecting member 53 and placed in the second side frame 52. It can assume a folded state (see FIG. 3) in which it is folded around its periphery. That is, when the panels 11 to 16 are unfolded and assembled into a box-like unfolded state (see FIGS. 2 and 4), the bottom plate 58 is arranged in a horizontal unfolded state. On the other hand, when the plurality of panels 11 to 16 are folded to take the folded state (see FIG. 3), the bottom plate 58 is lifted vertically and placed 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 (on the minus side in the X direction). This fulcrum portion 58a is located below (on the negative side in the Z direction) than the bottom panel 16 (described later). In this case, the entire connecting portion (fulcrum portion 58a) connecting the bottom plate 58 and the lower support portion 54 is located outside the panels 11 to 16. As a result, when the surrounding area is surrounded by a heat insulating material as described later, the connecting part is not placed across the accommodation space 20 (described later) and the outside air, and the connecting part becomes a heat bridge. Therefore, it is possible to prevent the heat insulation properties of the housing space 20 from decreasing. Further, there is no possibility that the connecting portion (fulcrum portion 58a) will interfere with the panels 11 to 16 while the bottom plate 58 is moved between the folded state and the unfolded state.

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

The panels 11 to 16 are provided as a whole so that they can be unfolded and folded with respect to the truck body 50, and as described above, they can be unfolded and assembled into a box shape (FIG. 2), and can be nested. It can take a folded state (FIG. 3).

FIG. 2 shows the panels 11 to 16 in the unfolded state. As shown in FIG. 2, the panels 11 to 16 have a substantially rectangular parallelepiped shape in the unfolded state, and include a top panel 11, a front panel 12, a back panel 13, a first side panel 14, and a second side panel 14. 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 (out of the six surfaces constituting each panel). , the widest pair of mutually opposing surfaces) each have a substantially rectangular shape. Further, the front panel 12 and the back panel 13 have substantially the same size on their main surfaces, and the first side panel 14 and the second side panel 15 have substantially the same size on their main surfaces. It has size. Each of the panels 11 to 16 is made of a rigid plate-like member and is designed not to be flexibly deformed during use.

In the unfolded state, by being surrounded by the six panels 11 to 16, it is possible to form a storage space 20 for storing a loaded object. When each of these panels 11 to 16 is unfolded, a substantially rectangular parallelepiped-shaped accommodation space 20 is formed between each of the panels 11 to 16. When the housing space 20 is surrounded by a heat insulating material as described later, heat inflow and outflow to the outside is restricted and heat insulation can be maintained. Furthermore, at least some of the six panels 11 to 16 are provided movably relative to the adjacent other panels 11 to 16, respectively. Thereby, the transportation trolley 10 can be changed from the unfolded state in which the accommodation space 20 is formed to the folded state in which the accommodation 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 folded to allow nesting with another transport trolley 10. Further, in the unfolded state, each of the six panels 11 to 16 has its peripheral edge in close contact with one of the other panels 11 to 16, thereby ensuring the airtightness of the accommodation space 20.

The six panels 11 to 16 each include a heat insulating panel having a heat insulating section 40 including a vacuum heat insulating material 41, as will be described later (see FIG. 6). Note that in this embodiment, each of the six panels 11 to 16 includes the vacuum heat insulating material 41, but the present invention is not limited to this. Some or all of the panels 11-16 may include insulation, such as foam insulation.

Next, the configuration of each panel 11 to 16 will be further explained. In addition, in the following, "panels 11 to 16 (partial panels) are parallel (perpendicular) to a predetermined surface" means "the main surfaces of panels 11 to 16 (partial panels) are parallel to a predetermined surface" It means "parallel (perpendicular)".

(Top panel)
The top panel 11 is a panel located on the top side (positive side in the Z direction) in the unfolded state (FIG. 2), and is arranged parallel to the horizontal plane (XY plane). In addition, in the unfolded state, the top panel 11 is connected to the first side frame 51 and the second side frame 52 of the trolley body 50, the first side panel 14, the second side panel 15, the back panel 13, and the front panel. 12.

This top panel 11 has a structure that can be partially opened and closed, and has a first top panel 11a located on the first side frame 51 side, and a space between the first side frame 51 and the second side frame 52. It has a second top panel 11b located on the side, and a third top panel 11c located on the second side frame 52 side. Of these, the second top panel 11b is foldably attached to the third top panel 11c via a top hinge member 21a (see FIG. 14(b)). Further, the second top panel 11b is detachably attached to the first top panel 11a via a hook-and-loop fastener (removable member) 21b (see FIG. 14(b)), and the hook-and-loop fastener 21b is removed. In this case, the second top panel 11b is configured to be separated from the first top panel 11a.

The first top panel 11a, the second top panel 11b, and the third top panel 11c are all 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 panel 11a and the third top panel 11c continue to be arranged horizontally. On the other hand, when the second top panel 11b is removed from the first top panel 11a, it is folded downward and is arranged to hang from the third top panel 11c. At this time, the second top panel 11b is disposed around the inside of the second side frame 52, inside (minus side in the X direction) with respect to the folded bottom plate 58, 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 unfolded state (FIG. 2), and is arranged perpendicular to the horizontal plane (XY plane) (parallel to the ZX plane). Further, in the unfolded state, the front panel 12 is arranged between the first side frame 51 and the second side frame 52 of the truck main body 50.

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

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

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

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

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

The first back partial panel 13a and the second back 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 panel 13b is folded so as to overlap the first back panel 13a, and is arranged inside the first back panel 13a (on the minus side in the Y direction). . At this time, the first back partial panel 13a remains on the back side without being folded. That is, the first rear partial panel 13a is in the same position in the folded state as in the unfolded state, and is arranged perpendicular to the horizontal plane (XY plane) (parallel to the ZX plane). Moreover, the first back partial panel 13a and the second back partial panel 13b are arranged perpendicularly to the first side frame 51 in a folded manner, and are parallel to the ZX plane. In this way, in the folded state, the second back partial panel 13b is removed to open the back panel 13. The open portion of the back panel 13 has a predetermined width W1 in the horizontal direction (X direction) (FIG. 3). On the other hand, the overlapped portion of the first back panel 13a and the second back panel 13b is not opened but is covered and has a predetermined width W2 in the horizontal direction (X direction) (FIG. 3). Note that depending on how the first back partial panel 13a and the second back partial panel 13b are folded, the entire rear panel 13 may be opened in the horizontal direction (X direction).

(1st side panel)
The first side panel 14 is a panel located on the first side frame 51 side (minus side in the X direction) in both the unfolded state (FIG. 2) and the folded state (FIG. 3), and is It is arranged vertically (parallel to the YZ plane). This first side panel 14 is composed of a single plate-shaped member. In addition, the first side panel 14 is arranged around the outside of the first side frame 51 of the trolley body 50 without moving in both the unfolded state (FIG. 2) and the folded state (FIG. 3), and is arranged on the YZ plane. They are parallel. The first side panel 14 is large enough to cover 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 panel 15 is a panel located on the second side frame 52 side (the positive side in the X direction) in both the unfolded state (FIG. 2) and the folded state (FIG. 3), and is It is arranged vertically (parallel to the YZ plane). This second side panel 15 is composed of a single plate-shaped member. In addition, the second side panel 15 is arranged around the outside of the second side frame 52 of the truck body 50 without moving in both the unfolded state (FIG. 2) and the folded state (FIG. 3), and is arranged on the YZ plane. They are parallel. The second side panel 15 is large enough to cover 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 unfolded state (FIG. 2), and is arranged parallel to the horizontal plane (XY plane). Furthermore, in the unfolded state, the bottom panel 16 is disposed on the bottom plate 58 of the truck 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-like member, and has a structure that can be folded by lifting it up. This bottom panel 16 is foldably attached to the first side frame 51 via a bottom hinge member 26a (see FIG. 12(b)).

Both bottom panels 16 are arranged parallel to a 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 (on the positive 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 removably attached to the first side frame 51 via, for example, a hook-and-loop fastener (removable member) 26b (see FIG. 12(b)). In this case, the hook-and-loop fastener 26b makes it easy to attach the bottom panel 16 to the first side frame 51 or to remove the bottom panel 16 from the first side frame 51. Furthermore, since the hook-and-loop fastener 26b has a certain area, it is possible to attach the bottom panel 16 to the first side frame 51 without strictly aligning the bottom panel 16 with respect to the first side frame 51. . Furthermore, positional deviation and dimensional errors in the surface direction of the bottom panel 16 can be absorbed, and it is also easy to finely adjust the mounting position of the bottom panel 16 with respect to the first side frame 51.

The above-mentioned top hinge member 21a, first front hinge member 22a, second front hinge member 22b, third front hinge member 22c, first rear hinge member 23a, second rear hinge member 23b, and bottom hinge member 26a are , each may be composed of a bendable connecting cloth (connecting member). In this way, by constructing each hinge member 21a, 22a, 22b, 22c, 23a, 23a, 23b, and 26a from a connecting cloth, each panel (partial panel) can be easily unfolded or folded.

FIG. 3 shows the panels 11-16 in the folded state, as described above. As shown in FIG. 3, in the folded state, at least a portion of each panel 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), a third front panel 12c, a second front panel 12b, a first front panel 12a, and a first side panel. 14 and the bottom panel 16 overlap. Note that 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 panel 15, the bottom plate 58, and the second top panel 11b overlap in order from the outside (the positive side in the X direction). Note that the second side frame 52 is located between the second side panel 15 and the bottom plate 58.

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

In this embodiment, T is the greater thickness of the total thickness T1 of the first panel group G1 and the total thickness T2 of the second panel group G2, and n is the number of transport carts 10 that can be nested. . 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 nestable transport carts 10 is three, as will be 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 equal to or greater than (n-1)×T, other objects can be attached to the transportation cart 10 through the open portion of the back panel 13. It becomes possible to nest the transportation trolleys 10. 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 It becomes substantially difficult to nest the transport trolleys 10.

The thickness of each panel 11 to 16 is preferably, for example, 5 mm or more and 50 mm or less. In this embodiment, an example will be described in which the panels 11 to 16 have the same thickness; however, the panels 11 to 16 may have different thicknesses. Further, 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. Note that the total thickness T1 (T2) of the first panel group G1 (second panel group G2) refers to the total thickness T1 (T2) of the first panel group G1 (second panel group G2). The distance between the outer surface of the outermost member and the inner surface of the innermost member among the side frame 51, second side frame 52, and bottom plate 58. In this case, it is preferable that the sum of 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 sum of the total thickness T1 and the total thickness T2, the number of transport vehicles 10 that can be nested can be increased.

Note that the above-described distance Pa between the first wheel mounting frame 67 and the second wheel mounting frame 68 (FIG. 4) and the distance Pb between the second wheel mounting frame 68 and the third wheel mounting frame 69 (FIG. 4) are as follows. It is necessary to satisfy the relationships “T×n<Pa” and “Wc×n<Pb”. However, if the width of the wheel attachment frames 67, 69 is wider (larger) than T, the following relationships need to be satisfied: "width of the wheel attachment frames 67, 69×n<Pa" and "Wc×n<Pb".

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

As shown in FIG. 6, the heat insulating section 40 of each panel 11 to 16 includes a vacuum heat insulating material 41, a foam heat insulating material 42, a heat insulating envelope 43, a heat insulating material protection member 44, and a heat shielding sheet 45. have.

Among these, the vacuum insulation material 41 is attached to the foam insulation material 42. This vacuum heat insulating material 41 is composed of a core material 41a and an exterior material 41b provided around the core material 41a. A foamed heat insulating material 42 is arranged on the housing space 20 side of the vacuum heat insulating material 41 (lower side in FIG. 6). Thereby, it is possible to reduce the risk that the vacuum heat insulating material 41 will be damaged when the loaded object placed in the accommodation space 20 collides with it.

The foam heat insulating material 42 can be arranged adjacent to the vacuum heat insulating material 41 at least on the housing space 20 side. The foam heat insulating material 42 may be a known foam heat insulating material, and may be a polyurethane foam, for example.

The heat insulating envelope 43 is formed to surround the vacuum heat insulating material 41. This heat-insulating envelope 43 is placed on the foam heat-insulating material 42 and is fixed to the foam heat-insulating material 42 . By arranging the heat insulating outer envelope 43 so as to surround the vacuum heat insulating material 41, the heat insulation performance is improved compared to the case where the heat insulating outer envelope 43 is not disposed. It is also possible to construct a panel in which the vacuum heat insulating material 41 has approximately the same area as the foam heat insulating material 42 and the heat insulating envelope 43 is not used. In this case, the insulation performance can be further improved, but since there is no insulation envelope 43, there is a risk that the vacuum insulation material 41 will be vulnerable to breakage due to sharp objects entering from the side. Note that a slight gap is formed between the insulation outer envelope 43 and the vacuum insulation material 41, so even if the size of the vacuum insulation material 41 changes slightly, the vacuum insulation material 41 cannot be removed from the insulation. It can be housed within the enclosure 43.

Further, the heat insulating material protection member 44 is provided on the heat insulating envelope portion 43 and mainly plays the role of protecting the vacuum heat insulating material 41. As this heat insulating material protection member 44, for example, a protection material made of an organic polymer can be used.

The heat shielding sheet 45 is arranged so as to surround the entire outer periphery of the vacuum heat insulating material 41 , the foamed heat insulating material 42 , the heat insulating envelope 43 , and the heat insulating material protection member 44 . This heat shielding sheet 45 can be placed to cover the entirety of the vacuum heat insulating material 41 and the foamed heat insulating material 42. Examples of the heat shielding sheet 45 include a multilayer sheet containing metal foil, a vapor deposition sheet having a vapor deposition layer formed on one side of a resin sheet, and the like.

Next, the vacuum insulation material 41 will be further explained. As shown in FIG. 7A, the vacuum heat insulating material 41 is composed of a core material 41a and an exterior material 41b having gas barrier properties, and is a heat insulating material obtained by reducing the pressure inside the exterior material 41b. FIG. 7(b) shows 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), no voids are formed. The void may or may not be formed depending on the method of manufacturing the vacuum heat insulating material 41.

For the core material 41a, materials used for the core materials of conventionally known vacuum insulation materials can be used, such as powders such as silica, foams such as urethane polymers, fibers such as glass wool, etc. Porous bodies may also be used.

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

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

(Disassembly of transportation trolley)
8 to 15 are diagrams illustrating each step when disassembling the transportation trolley 10 in order. In addition, FIG. 8(a), FIG. 9(a), FIG. 10(a)-(c), FIG. 11(a), FIG. 12(a), FIG. 13(a), FIG. 14(a), FIG. (a) to (c) are respectively plan views of the transportation trolley 10, and the top panel 11 is not shown. Moreover, FIG.8(b), FIG.9(b), FIG.11(b), FIG.12(b), FIG.13(b), FIG.14(b) is a front view which shows the trolley|bogie 10 for transportation.

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

Next, as shown in FIGS. 9(a) and 9(b), 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. 10(a), the first front panel 12a, the second front panel 12b, and the third front panel 12c are folded into a folding screen shape. Specifically, the first front partial panel 12a rotates clockwise in a plan view with respect to the first side panel 14 about the first front hinge member 22a. Further, the second front partial panel 12b rotates counterclockwise in a plan view with respect to the first front partial panel 12a around the second front hinge member 22b. Further, the third front panel 12c rotates clockwise relative to the second front panel 12b about the third front hinge member 22c in a plan view.

Subsequently, as shown in FIG. 10(b), the first front panel 12a, the second front panel 12b, and the third front 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.

Thereafter, as shown in FIG. 10(c), the first front panel 12a, the second front panel 12b, and the third front panel 12c, which overlap each other, move to the outer periphery of the first side frame 51. As a result, as shown in FIGS. 11(a) and 11(b), the front panel 12 is folded, and the front side of the transportation trolley 10 is completely opened in the horizontal direction (X direction). In addition, when the loaded object is stored in the accommodation space 20, the loaded object may be taken out from the front side in this state.

Next, as shown in FIGS. 12(a) and 12(b), 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 as seen from the front with respect to the first side frame 51 around the bottom hinge member 26a. Thereby, the bottom panel 16 is folded so as to overlap the inside of the first side frame 51 (on the positive 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 a 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 relative to the second side frame 52 when viewed from the front, and is folded so as to overlap the inside of the second side frame 52 (minus side in the X direction). Located on the inner periphery. 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 fixing means (not shown).

Subsequently, as shown in FIGS. 14(a) and 14(b), the top panel 11 is folded, thereby changing the top panel 11 from the unfolded state to the folded state. During this time, by removing the hook-and-loop fastener 21b, the second top panel 11b is separated from the first top panel 11a, and is placed in front of the third top panel 11c with the top hinge member 21a as the center. Rotate counterclockwise visually. As a result, the second top panel 11b is folded downward and is arranged to hang down from the third top panel 11c. At this time, the second top panel 11b is disposed around the inner side of the second side frame 52 and on the inner side (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 time, first, as shown in FIGS. 15(a) and 15(b), the first back partial panel 13a rotates counterclockwise in plan view with respect to the first side panel 14 about the second back hinge member 23b. . Further, the second back partial panel 13b rotates clockwise in plan view with respect to the first back partial panel 13a around the first back hinge member 23a. Thereby, the second back partial panel 13b is folded so as to overlap the first back partial panel 13a, and is arranged inside the first back partial panel 13a (on the minus side in the Y direction). Furthermore, as shown in FIG. 15(c), the first rear partial panel 13a rotates clockwise in plan view with respect to the first side panel 14 about the second rear hinge member 23b, and thereby 1 rear partial panel 13a is returned to the same position as the unfolded state (FIG. 15(a)).

In this way, by removing the second back partial panel 13b, the back panel 13 is opened by a predetermined width W1. On the other hand, the overlapped portion of the first back panel 13a and the second back panel 13b is covered without being opened.

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

As described above, when the transportation trolley 10 is not used, the panels 11 to 16 can be folded to make the overall volume as small as possible for storage and transportation.

(Assembling of transportation trolley)
The transportation trolley 10 can be assembled in the reverse order of the disassembly method described above. That is, first, start from the reverse operation of FIGS. 15(a), 15(b), and 15(c), and change the back panel 13 from the folded state to the unfolded state. Next, as a reverse operation of FIGS. 14(a) and 14(b), the top panel 11 is changed from the folded state to an unfolded state, and then, as a reverse operation of FIGS. 13(a) and 13(b), the bottom plate 58 is unfolded from the folded state. state. Next, as a reverse operation of FIGS. 12(a) and 12(b), the bottom panel 16 is changed from the folded state to the unfolded state, and finally, as a reverse operation of FIGS. By doing so, the assembly work is completed.

(Nesting of transportation trolleys)
Next, an explanation will be given of the operation when nesting the transportation trolleys 10. FIGS. 16(a) to 16(c) are plan views illustrating the operation when nesting the transportation trolleys 10. Note that in FIGS. 16(a) to 16(c), the first top panel 11a and the third top panel 11c are not shown.

First, as shown in FIG. 16(a), 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. 16(b), another transport trolley 10A (second transport trolley 10A) in a folded state is prepared. This second transport trolley 10A has the same configuration as the first transport trolley 10. Next, the second transportation trolley 10A is made to approach the first transportation trolley 10 from the front side (the negative side in the Y direction) of the first transportation trolley 10, and is overlapped with the first transportation trolley 10. At this time, the first panel group G1 of the second transportation truck 10A is made to come as close as possible to the first panel group G1 of the first transportation truck 10. In this case, since the back panel 13 of the second transport trolley 10A is opened by the predetermined width W1, the second panel group G2 of the first transport trolley 10 is the back panel of the second transport trolley 10A. No interference with 13.

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

By the way, as mentioned above, each back panel 13 of these transportation trolleys 10, 10A, 10B is open by width W1, and this width W1 is (n-1) in the horizontal direction (X direction). The length is longer than ×T. Here, as described above, T is the greater of the total thickness T1 of each of the first panel groups G1 and the total thickness T2 of the second panel group G2 of the transportation trolleys 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, 10B to be equal to or larger than (n-1)×T, n transport trolleys 10, 10A, 10B can be used. It becomes possible to nest reliably and store these transportation trolleys 10, 10A, and 10B in a compact manner. The reason why such a relationship is established will be explained below.

FIGS. 17(a) and 17(b) are plan views schematically showing the nested transport trolleys 10, 10A, 10B. Only group G1 and second panel group G2 are illustrated. Further, assume that the transportation carts 10, 10A, and 10B are nested in close contact with each other along the X direction without any gaps. In addition, in FIGS. 17(a) and 17(b), 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 chain double-dashed line. There is.

FIG. 17(a) shows a case where the total thickness T1 of the first panel group G1 of each transportation trolley 10, 10A, 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 transportation carts 10, 10A, and 10B is La, and the width (length in the X direction) of the back panel 13 is W2. At this time, when focusing on the first transportation trolley 10 in FIG. 17(a), the relationship La=T+W2+W1+T2 (formula 1) holds true (see the upper side of FIG. 17(a)). On the other hand, when focusing on the n (3) nested transportation trolleys 10, 10A, and 10B, the relationship La=n×T+W2+T2 (formula 2) holds (see the lower side of FIG. 17(a)). From the above equations 1 and 2, the relationship W1=(n-1)×T is obtained. Therefore, if W1 is (n-1)×T or more, it is possible to nest n transport vehicles 10, 10A, and 10B.

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

As described above, according to the present embodiment, the larger thickness of the total thickness T1 of the first panel group G1 and the total thickness T2 of the second panel group G2 is defined as T, and the number of transport carts 10 that can be nested is determined. When n is the rear panel 13, the rear panel 13 is opened by a width equal to or more than (n-1)×T in the horizontal direction. Thereby, other transportation vehicles 10 do not interfere with the back panel 13, and n transportation vehicles 10 can be reliably nested. As a result, the plurality of transportation carts 10 can be stored compactly 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 into a box shape, and in a folded state in which they can be nested with other transportation trolleys 10. Thereby, by unfolding the panels 11 to 16, a highly airtight storage space 20 can be formed inside the panels 11 to 16 in which a loaded object can be stored. On the other hand, when the transport trolley 10 is not used, the panels 11 to 16 are folded to allow the transport trolleys 10 to be stored compactly by nesting them with other identical 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 G1 and a second panel group G2 including the second side frame 52 are formed. Thereby, the panels 11 to 16 can be easily folded, and the plurality of panels 11 to 16 can be arranged compactly around the first side frame 51 and the second side frame 52.

Further, according to this embodiment, in the folded state, the first back 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. In addition, since the total thickness T1 of the first panel group G1 and the total thickness T2 of the second panel group G2 are prevented from becoming unnecessarily thick by the amount of the back panel 13a, depending on the extent to which the thickness is suppressed, , the number of nestable transport carts 10 can be increased.

Further, according to the present embodiment, since the truck body 50 has six wheels 61 to 66, it is possible to load a heavy load or a large load on the transportation truck 10. Furthermore, in such a six-wheeled elongated transportation trolley 10, the panels 11 to 16 can be selectively unfolded 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. The vacuum insulation material 41 or the foam insulation material has good insulation performance even if it is thin, so it can improve the insulation performance of the storage space 20 in the panels 11 to 16 and store the loaded items in a cool or warm state. . Furthermore, by using the vacuum insulation material 41 or the foam insulation material, the weight of the panels 11 to 16 can be reduced, the storage capacity of the transportation trolley 10 in the unfolded state can be increased, and the storage capacity of the transportation trolley 10 in the folded state can be increased. 10 can be made more compact. Furthermore, 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, depending on the degree of thinness, it is possible to increase the number of transport carts 10 that can be nested. can.

Further, according to the present embodiment, the plurality of panels 11 to 16 include 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 panel 16. and has. As a result, the storage space 20 is covered from all directions by the panels 11 to 16, so that the loaded items in the storage space 20 can be protected from all directions.

Further, according to this embodiment, the front panel 12 includes a plurality of foldable front partial panels 12a, 12b, and 12c. Accordingly, by folding the front panel panels 12a, 12b, and 12c, the front side of the transportation trolley 10 is opened, and it becomes easy to take out the loaded items from the storage space 20 and to store them in the storage space 20. Furthermore, the front panel panels 12a, 12b, and 12c can be arranged in a compact manner around the outside of the first side frame 51. In this case, the lengths of the front panel panels 12a, 12b, 12c in the width direction (Y direction in the folded state) are suppressed, and when the transportation trolley 10 passes through a narrow passage, the front panel panels 12a, 12b, 12c are Interference with surrounding objects is prevented.

Further, according to the present embodiment, the truck main body 50 further includes 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, in the unfolded state, the load of the load can be supported by the bottom plate 58, and in the folded state, by lifting the bottom plate 58 and placing it around the second side frame 52, it is possible to nest the transport trolley 10. can be put into a state.

(Modified example)
Next, various modifications of the transportation trolley will be described.

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

In the above embodiment, the first panel group G1 includes the third front panel 12c, the second front panel 12b, the first front panel 12a, the first side panel 14, and the first side panel 12c. The second panel group G2 is composed of the frame 51 and the bottom panel 16, and the second panel group G2 is composed of the second side panel 15, the second side frame 52, the bottom plate 58, and the second top panel 11b. I explained it using an example. However, each panel or partial panel may belong to either the first panel group G1 or the second panel group G2. Further, although the explanation has been given using an example in which the bottom plate 58 is folded around the second side frame 52 to form the second panel group G2, the case is not limited to this, and the bottom plate 58 is folded around the first side frame 51. Thus, 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 truck main body 50 in the folded state has been described as an example. However, the present invention is not limited to this, and some of the panels 11 to 16 may be removed from the truck 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 at a location separate from the transportation 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 heat insulating panels 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 heat insulating properties. For example, by constructing each of the panels 11 to 16 from a transparent or opaque thin plate, it is possible to prevent the loaded items stored in the storage space 20 from falling. Furthermore, by making each of the panels 11 to 16 an opaque thin plate, the loaded items accommodated in the accommodation space 20 can be hidden so that they cannot be seen from the outside.

Further, in the above embodiment, an example has been described in which the front panel 12 is completely opened in the horizontal direction (X direction) in the folded state. However, the present invention is not limited to this, and a portion 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 interfere with nesting the transportation 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 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, without providing the bottom panel 16, the bottom plate 58 may be provided with heat insulating properties, for example, by spraying a heat insulating material onto the bottom plate 58. In this case, there is no need to move the bottom panel 16, so the workability 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 panel 12a, the second front panel 12b, and the third front panel 12c of the front panel 12 are arranged outside the first side frame 51 is taken as an example. explained. However, the present invention is not limited thereto, and as shown in FIG. It's okay. In this case, the front panel 12 further includes a fourth front partial panel 12d fixed to the first side panel 14 or the first side frame 51. The first front panel 12a is foldably attached to the fourth front panel 12d. Note that in FIG. 18, the first top panel 11a and the third top panel 11c are not shown.

Further, as shown in FIG. 19, a removable intermediate shelf 59 may be provided on the first side frame 51 and the second side frame 52 of the truck body 50. This intermediate shelf 59 has a rectangular shape in plan view, and extends along the longitudinal direction (X direction) of the connecting member 53. By providing such an intermediate shelf 59, loaded items can be arranged and arranged inside the storage space 20. The intermediate shelf 59 is detachably attached to the horizontal bars 56 of the first side frame 51 and the horizontal bars 56 of the second side frame 52. That is, in the unfolded 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 truck body 50. In this case, the intermediate shelf 59 can be attached to any of the horizontal bars 56 provided in the height direction (Z direction). Note that the present invention is not limited to this, and the intermediate shelf 59 may be separable, for example, at a portion in the longitudinal direction (X direction). In this case, in the folded state, a portion of the pair of intermediate shelves 59 separated from each other may be folded around the inner sides 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 diagrams showing the second embodiment. The second embodiment shown in FIGS. 20 to 35 differs mainly in the configuration of each panel 11 to 16, and the other configurations are substantially the same as the first embodiment described above. In FIGS. 20 to 35, parts that are the same as those shown in FIGS. 1 to 19 are designated by the same reference numerals, and detailed description thereof will be omitted. Note that the following description will focus on the differences from the first embodiment.

As shown in FIGS. 20 to 22, the transportation truck 10 according to the present embodiment includes a truck body 50 and a plurality of panels 11 to 16 (six panels) provided on the truck body 50 so as to be expandable and foldable. panels 11 to 16). Of these, the structure of the truck body 50 is substantially the same as that of the first embodiment.

(Panel composition)
Next, the configurations of panels 11 to 16 will be explained. The panels 11 to 16 are provided so as to be able to be expanded and folded as a whole with respect to the trolley body 50, and can be unfolded and assembled into a box shape in the unfolded state (FIG. 20), and in the folded state in which nesting is possible (FIG. 22). ) can be taken. Further, FIG. 21 shows a case where only the front panel 12 among the panels 11 to 16 is in a 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, by being surrounded by the six panels 11 to 16, it is possible to form a storage space 20 for storing a loaded object.

Next, the configuration of each panel 11 to 16 will be further explained.

(Top panel)
The top panel 11 is arranged above the first side frame 51, the second side frame 52, the first side 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) rather than the back panel 13, and on the first side surface side (minus side in the X direction) than the second side panel 15.

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

The first top panel 11a and the second top panel 11b are both arranged horizontally (parallel to the XY plane) in the unfolded state (FIG. 20). In addition, in the folded state (FIG. 22), the first top panel 11a is arranged horizontally, while the second top panel 11b is folded downward and separated from the first top panel 11a. placed so that it hangs down. At this time, the second top panel 11b is arranged around the inner side 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, 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). , are arranged perpendicular to the horizontal plane (XY plane) (parallel to the ZX plane).

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

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

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

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

The first back partial panel 13a and the second back 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 panel 13b is folded so as to overlap the first back panel 13a, and is arranged on the outside (positive side in the Y direction) of the first back panel 13a. Ru. At this time, the first back partial panel 13a remains on the back side without being folded. That is, the first rear partial panel 13a is in the same position in the folded state as in the unfolded state, and is arranged perpendicular to the horizontal plane (XY plane) (parallel to the ZX plane). Moreover, the first back partial panel 13a and the second back partial panel 13b are arranged perpendicularly to the first side frame 51 in a folded manner, and are parallel to the ZX plane. In this way, in the folded state, the second back partial panel 13b is removed to open the back panel 13. The open portion of the back panel 13 has a predetermined width W1 in the horizontal direction (X direction) (FIG. 22).

(1st side panel)
The first side panel 14 is a panel located on the first side frame 51 side (minus side in the X direction) in both the unfolded state (FIG. 20) and the folded state (FIG. 22), and is It is arranged vertically (parallel to the YZ plane). The configuration of this first side panel 14 is substantially the same as that of the first embodiment.

(Second side panel)
The second side panel 15 is a panel located on the second side frame 52 side (the positive side in the X direction) in both the unfolded state (FIG. 20) and the folded state (FIG. 22), and is It is arranged vertically (parallel to the YZ plane). The configuration of this 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 unfolded state (FIG. 20), and is arranged parallel to the horizontal plane (XY plane). Further, in the unfolded state, the bottom panel 16 is disposed on the bottom plate 58 of the truck body 50 and between the first side frame 51 and the second side frame 52. The configuration of this bottom panel 16 is substantially the same as that of the first embodiment.

Note that, as shown in FIG. 21, rectangular parallelepiped-shaped gap panels 17 are provided around the bottoms (minus side in the Z direction) of the first side frame 51 and the second side frame 52, respectively. This gap panel 17 closes the gap between the bottom panel 16 and the first side panel 14 or the second side panel 15, thereby further improving the heat insulation properties of the accommodation space 20.

FIG. 22 shows the panels 11 to 16 in a folded state. As shown in FIG. 22, in the folded state, at least a portion of each panel 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 panel 12b, the third front panel 12c, the first side panel 14, the bottom panel 16, and the The second top panel 11b overlaps. Note that 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 panel 15 and the bottom plate 58 overlap in order from the outside (the positive side in the X direction). Note that the second side frame 52 is located between the second side panel 15 and the bottom plate 58.

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

As in the case of the first embodiment, the greater thickness of the total thickness T1 of the first panel group G1 and the total thickness T2 of the second panel group G2 is defined as T, and the nestable transport trolley 10 is 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 transportation trolley)
Next, the operation when disassembling the transportation trolley 10 will be explained. FIGS. 23 to 25 are diagrams illustrating a part of the process of sequentially disassembling the transportation trolley 10.

First, as shown in FIG. 20, it is assumed that the six panels 11 to 16 of the transportation trolley 10 are unfolded and assembled into a box shape (expanded state). At this time, a substantially rectangular parallelepiped-shaped accommodation space 20 is formed between each of 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. 23(a), the third front panel 12c is folded so as to overlap the second front panel 12b. Specifically, the third front panel 12c rotates clockwise in plan view relative to the second front panel 12b about the third front hinge member 22c.

Subsequently, as shown in FIG. 23(b), the second front panel 12b and the third front panel 12c overlap each other, and in this state, the first front panel 12a is folded around the second front hinge member 22b. Rotates clockwise in plan view.

Thereafter, as shown in FIG. 23(c), the second front panel 12b and the third front panel 12c move to the outer periphery of the first side frame 51. Specifically, the first front partial panel 12a rotates clockwise in a plan view with respect to the first side panel 14 about the first front hinge member 22a. At this time, the first front panel 12a is located on the front side (minus side in the Y direction) with respect to the first side panel 14, and the second front panel 12b and the third front panel 12c are located 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 folded, and the front side of the transportation trolley 10 is completely opened in the horizontal direction (X direction).

Next, in the same manner as in the first embodiment, the bottom panel 16 is folded, thereby changing the bottom panel 16 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 when viewed from the front. Thereby, the bottom panel 16 is located around the inner side of the first side frame 51.

Next, in the same manner as in the first embodiment, the bottom plate 58 is folded, thereby changing the bottom plate 58 from the unfolded state to the folded state. During this time, the bottom plate 58 rotates clockwise relative to the second side frame 52 when viewed from the front, and is folded so as to overlap the inside of the second side frame 52 (minus side in the X direction). Located on the inner periphery.

Next, as shown in FIGS. 24(a) to 24(c), by folding the top panel 11, the top panel 11 changes from the unfolded state to the folded state.

During this time, first, as shown in FIGS. 24(a) and 24(b), the first top panel 11a is rotated counterclockwise in front view with respect to the first side panel 14 about the first top hinge member 21c. The second top panel 11b rotates clockwise relative to the first top panel 11a when viewed from the front about the second top hinge member 21d.

Subsequently, as shown in FIG. 24(c), the second top panel 11b moves to the inner periphery of the first side frame 51. Specifically, the first top panel 11a rotates clockwise relative to the first side panel 14 when viewed from the front about the first top hinge member 21c, and the second top panel 11b rotates clockwise around the first top hinge member 21c. The second top hinge member 21d rotates clockwise relative to the first top partial panel 11a when viewed from the front. As a result, the second top panel 11b is folded downward and is arranged to hang down from the first top panel 11a. At this time, the second top portion panel 11b is arranged around the inside of the first side frame 51 and inside (on the positive side in the X direction) with respect to the bottom 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 time, first, as shown in FIGS. 25(a) and 25(b), the second back panel 13b rotates counterclockwise in plan view with respect to the first back panel 13a around the first back hinge member 23a. do. Thereby, the second back partial panel 13b is folded so as to overlap the first back partial panel 13a, and is arranged on the outside (the positive side in the Y direction) of the first back partial panel 13a. On the other hand, the first rear partial panel 13a maintains the same position even in the folded state as in the unfolded state.

In this way, the six panels 11 to 16 of the transportation trolley 10 are all folded, and the first panel group G1 and the second panel group are arranged around the first side frame 51 and the second side frame 52, respectively. G2 is formed.

(Assembling of transportation trolley)
The transportation trolley 10 can be assembled in the reverse order of the disassembly method described above. That is, first, start from the reverse operation of FIGS. 25(a) and 25(b), and change the back panel 13 from the folded state to the unfolded state. Next, as a 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 a reverse operation of FIGS. 23(a) to 23(c), the front panel 12 is changed from the folded state to the unfolded state. is completed.

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

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

The first bottom partial panel 16a and the second bottom partial 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 panel 16b is folded so as to overlap the first bottom panel 16a. At this time, the first bottom partial panel 16a and the second bottom partial panel 16b are arranged around the inner side of the first side frame 51 and are parallel to the YZ plane.

When folding the bottom panel 16, first, as shown in FIGS. 26(a) and 26(b), the first bottom partial panel 16a is turned around the first bottom hinge member 26c with respect to the first side panel 14 when viewed from the front. Rotate clockwise. Further, the second bottom partial panel 16b rotates clockwise relative to the first bottom partial panel 16a about the second bottom hinge member 26d when viewed from the front. Thereafter, as shown in FIG. 26(c), the first bottom partial panel 16a and the second bottom partial panel 16b are arranged around the inner side of the first side frame 51 in an overlapping state.

In this embodiment, 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.

The configuration for removably attaching the panels 11 to 14, 16, and 17 will be described below with reference to FIGS. 27 to 33.

As shown in FIG. 27(a), the first front panel 12a of the front panel 12 is provided with a convex pinched portion 28a that protrudes toward the first side panel 14 side. Further, the first side panel 14 is provided with a concave pinching portion 29a that sandwiches the pinched portion 28a. The front panel 12 is attached to the first side panel 14 by sandwiching the sandwiched portion 28a between the sandwiched portions 29a. On the other hand, the front panel 12 is removed from the first side panel 14 by separating the sandwiched portion 28a 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. 27(b), when the front panel 12 is transferred from the unfolded state to the folded state, the first front partial panel 12a rotates clockwise relative to the first side panel 14 in a plan view. Also in this case, since the sandwiched portion 28a provided on the first front panel 12a is firmly sandwiched between the sandwiched portions 29a provided on the first side panel 14, the first front panel 12a is It will not come off from the side panel 14.

FIG. 28(a) is an enlarged view showing the attachment portion between the first front panel 12a and the first side panel 14. FIG. As shown in FIG. 28(a), the sandwiched portion 28a provided on the first front panel 12a has a hook portion 31a of a hook-and-loop fastener. Furthermore, the sandwiching portion 29a provided on the first side panel 14 has a hook-and-loop fastener loop portion 31b. The first front panel 12a and the first side panel 14 are detachably attached to each other by attaching and detaching the hook portion 31a of the sandwiched portion 28a and the loop portion 31b of the sandwiching portion 29a. Note that a loop portion 31b of a hook-and-loop fastener is provided in a region A1 on the first side panel 14 side of the first front panel 12a, and in this region A1, the sandwiched portion 28a is attached to the first front panel 12a. is removably attached to. As a result, when the front panel 12 is moved from the unfolded state to the folded state, the first front partial panel 12a can be smoothly rotated toward the front side (minus side in the Y direction) relative to the first side panel 14 (Fig. 27(b)).

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

Note that, as shown in FIG. 29, the first side panel 14 may be provided with a sandwiched portion 28a, and the first front panel 12a may be provided with a sandwiching portion 29a that sandwiches the sandwiched portion 28a.

As shown in FIG. 30, the first side panel 14 is provided with a convex pinched portion 28b that protrudes toward the back panel 13 side. Further, the first back partial panel 13a of the back panel 13 is provided with a concave pinching portion 29b that sandwiches the pinched portion 28b. The first side panel 14 is attached to the back panel 13 by sandwiching the sandwiched portion 28b between the sandwiched portions 29b. On the other hand, the first side panel 14 is removed from the back panel 13 by separating the pinched portion 28b from the pinched 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 pinching part 29b has a loop part of a hook-and-loop fastener, and the pinched part 28b has a hook part of a hook-and-loop fastener. However, the invention is not limited thereto, and the pinching part 29b may have a hook part, and the pinched part 28b may have a loop part. Further, the first side panel 14 may be provided with the sandwiching portion 29b, and the first back partial panel 13a may be provided with the sandwiched portion 28b.

As shown in FIG. 31, the first side panel 14 is provided with a convex pinched portion 28c that protrudes toward the top panel 11 side. Further, the first top panel 11a of the top panel 11 is provided with a concave sandwiching portion 29c that sandwiches the sandwiched portion 28c. The first side panel 14 is attached to the top panel 11 by sandwiching the sandwiched portion 28c between the sandwiched portions 29c. On the other hand, the first side panel 14 is removed from the top panel 11 by separating the sandwiched portion 28c from the sandwiched 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 part 29c has a loop part of a hook-and-loop fastener, and the pinched part 28c has a hook part of a hook-and-loop fastener. However, the present invention is not limited to this, and the pinching part 29c may have a hook part, and the pinched part 28c may have a loop part. Further, the first side panel 14 may be provided with a sandwiching portion 29c, and the first top panel 11a may be provided with a sandwiched portion 28c.

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

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

FIGS. 33(a) and 33(b) show 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 each have a panel center portion 46 and a heat shield sheet 45 surrounding the panel center portion 46. As shown in FIGS. Among these, the panel center portion 46 includes a vacuum heat insulating material 41, a foam heat insulating material 42, a heat insulating envelope portion 43, and a heat insulating material protection member 44 (see FIG. 6). As shown in FIG. 33(a), the sandwiched portions 28a to 28d are formed in a convex shape by protruding a portion of the heat shield sheet 45 that protrudes from the panel center portion 46. Further, as shown in FIG. 33(b), the sandwiching portions 29a to 29d are formed into concave shapes by bending a portion of the heat shielding sheet 45 protruding from the panel center portion 46.

In this way, by detachably attaching the panels 11 to 14, 16, and 17 to each other, it is possible to not only use the cart 10 for transportation including the panels 11 to 17, but also to use the cart main body 50 from which the panels 11 to 17 are removed independently. It can also be used in Further, for example, when the truck body 50 and the panels 11 to 17 are manufactured at different locations, the transportation work of the truck body 50 and the panels 11 to 17 and the assembly of the transportation truck 10 can be carried out efficiently. Furthermore, each panel 11 to 17 can be removed from the truck body 50 when the transportation truck 10 is stored for a long period of time without being used.

Note that in this embodiment, not all of the panels 11 to 17 are necessarily removably attached to the other panels 11 to 17 or the truck body 50, and some of the panels 11 to 17 are attached to the other panels 11 to 17 or the truck body 50. 11 to 17 or the truck body 50 in a non-removable manner. Also in the first embodiment described above, all or part of the plurality of panels 11 to 16 may be detachably attached to each other, similar to the embodiments shown in FIGS. 27 to 33.

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

As shown in FIG. 34(a), the first back panel 13a of the back panel 13 includes a first swinging piece 71a and a second swinging piece 71b. Of these, the first swinging piece 71a extends from the X-direction minus side end of the first back panel 13a. Further, the second swinging piece 71b is located on the negative side of the first back panel 13a in the Y direction, and extends from the plus side of the first swinging piece 71a in the X direction. Hook-and-loop fasteners 72a and 72b are attached to the first swinging piece 71a and the second swinging piece 71b, respectively. Furthermore, adhesive members 73a and 73b such as tape are attached to the second swing piece 71b and the first back panel 13a, respectively. Furthermore, hook-and-loop fasteners 72c and 72d are attached to the surface on the positive side in the X direction and the surface on the negative side in the X direction of the first side panel 14, respectively.

As shown in FIG. 34(b), the adhesive members 73a and 73b of the back panel 13 are each bonded to the first side frame 51, thereby fixing the back panel 13 to the first side frame 51. Further, the hook-and-loop fastener 72a of the first swinging piece 71a and the hook-and-loop fastener 72b of the second swinging 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 swinging piece 71c and a fourth swinging piece 71d are provided at the X-direction minus side end of the first top panel 11a of the top panel 11. There is. Hook-and-loop fasteners 72e and 72f are attached to the third swinging piece 71c and the fourth swinging piece 71d, respectively. The hook-and-loop fasteners 72e and 72f are provided on mutually opposing surfaces of the third swinging piece 71c and the fourth swinging piece 71d, respectively. Furthermore, a fifth swinging piece 71e is provided at the end of the first side panel 14 on the positive side in the Z direction. Hook and loop fasteners 72g and 72h are attached to both sides of the fifth swinging piece 71e.

As shown in FIG. 35(b), when viewed from the front, the third swinging piece 71c and the fourth swinging piece 71d of the top panel 11 sandwich the fifth swinging piece 71e of the first side panel 14. Rotate like this. At this time, the hook-and-loop fastener 72e of the third swinging piece 71c and the hook-and-loop fastener 72g of the fifth swinging piece 71e are attached to each other, and the hook-and-loop fastener 72f of the fourth swinging piece 71d and the hook-and-loop fastener 72g of the fifth swinging piece 71e are attached to each other. Fasteners 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 the plurality of components disclosed in the above embodiments and modifications as necessary. Alternatively, some components may be deleted from all the components shown in the above embodiments and modifications.

10 Transportation trolley 11 Top panel 12 Front panel 13 Rear panel 14 First side panel 15 Second side panel 16 Bottom panel 20 Accommodation space 40 Heat insulation section 50 Truck body 51 First side frame 52 Second side frame 53 Connection member 58 Bottom plate 61 First wheel 62 Second wheel 63 Third wheel 64 Fourth wheel 65 Fifth wheel 66 Sixth wheel

Claims (3)

A transport trolley that can be nested with other transport trolleys,
A truck main body having a first side frame, a second side frame, and a connecting member that connects the first side frame and the second side frame to each other;
A plurality of panels are provided to be expandable and foldable with respect to the trolley body,
The plurality of panels can take an expanded state in which the plurality of panels are expanded into a box shape, and a folded state in which the plurality of panels can be folded to nest with the other transportation trolley,
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 top panel includes a top panel located on the second side frame and an additional top panel foldably attached to the top panel,
The second side panel is a transportation trolley located outside the second side frame. The transportation trolley according to claim 1 , wherein in the folded state, the top panel is arranged horizontally, and the additional top panel is arranged to hang from the top panel. A foldable bottom plate is provided on the connecting member, and in the folded state, the additional top portion panel is arranged around the inner side of the second side frame and inwardly with respect to the folded bottom plate. The transportation trolley according to claim 1 or 2 , wherein the transportation trolley is arranged.

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