Transport containers

Abstract

To provide a conveyance container capable of reducing noise during conveyance with a roller conveyor.SOLUTION: A conveyance container comprises a bottom wall 2, a side wall, and a flat plate-like part 21. The side wall extending upward from a peripheral edge of the bottom wall 2 forms a storage part whose upside is opened. The flat plate-like part 21 is arranged at a peripheral edge on a bottom face side of the bottom wall 2. The flat plate-like part 21 comprises a lower face 25, and an upper face 26 that acquires a space 27 where a center side of the bottom wall 2 or an outer side opposite to the center side is opened with part of the bottom face of the bottom wall 2 in between.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present disclosure relates to a transport container.

Background Art

[0002] Conventionally, transport containers have been used to transport various articles. The container body of a transport container has a substantially rectangular bottom wall and side walls extending upward from its four sides. The upper surface of the bottom wall serves as the bottom surface of the storage space, and the lower surface of the bottom wall serves as the grounding surface of the container body. Further, lattice ribs are formed over substantially the entire lower surface of the bottom wall (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] A transport container is conveyed, for example, by a roller conveyor. In this case, the lattice ribs on the lower surface of the transport container frequently contact or collide with the rollers of the roller conveyor, resulting in noise generation and deformation of the lattice ribs.

[0005] The present disclosure has been made in view of such circumstances, and an object thereof is to provide a transport container capable of reducing noise during conveyance by, for example, a roller conveyor.

Means for Solving the Problems

[0006] A transport container for achieving the above objective comprises a bottom wall, side walls, and a flat plate-like portion. The side walls extend upward from the periphery of the bottom wall and form a storage compartment that is open at the top. The flat plate-like portion is positioned on the periphery of the bottom surface of the bottom wall. The flat plate-like portion has a lower surface and an upper surface that secures a space between itself and a part of the bottom surface of the bottom wall, with the center side of the bottom wall or the outer side opposite the center being open. [Effects of the Invention]

[0007] According to the transport container described herein, noise can be reduced, for example, when transporting by a roller conveyor. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a perspective view of a transport container according to the first embodiment of this disclosure. [Figure 2] Figure 2 is a perspective view of the bottom wall of the transport container shown above, seen from the bottom side. [Figure 3] Figure 3 is a plan view of the bottom wall of the same object, seen from the bottom side. [Figure 4] Figure 4 is a partial perspective view of the bottom wall of the same object, seen from the bottom side. [Figure 5] Figure 5 is a partial perspective view (partially a cross-sectional view) of the bottom wall of the same structure, viewed from the bottom side. [Figure 6] Figure 6 is a partial cross-sectional view of the bottom wall of the same object. [Figure 7] Figure 7 is a partial cross-sectional view showing the bottom wall of the same as above positioned on the roller conveyor. [Figure 8] Figure 8 is a plan view of the bottom side of the bottom wall of a transport container according to the second embodiment of this disclosure. [Figure 9] Figure 9 is a partial perspective view of the bottom wall of the same object, seen from the bottom side. [Figure 10] Figure 10 is a cross-sectional view taken along line XX in Figure 8. [Modes for carrying out the invention]

[0009] 1. First Embodiment (1) Outline configuration of transport container Hereinafter, a transport container 1 according to the first embodiment of this disclosure will be described based on Figures 1 to 7.

[0010] The transport container 1 is a foldable container, meaning that it can be selected between an assembled state and a folded state. Figure 1 shows the assembled state of the transport container 1.

[0011] As shown in Figure 1, the transport container 1 comprises a bottom wall 2, a mouth frame member 3, and side walls 4. In the assembled state of the transport container 1 shown in Figure 1, the mouth frame member 3 is provided above the bottom wall 2 at a distance from it, and the side walls 4 are provided between the bottom wall 2 and the mouth frame member 3. The bottom wall 2, mouth frame member 3, and side walls 4 are formed of synthetic resin (for example, polypropylene).

[0012] In the following explanation, the top and bottom of the transport container 1 will be described as being in its normal state of use, with the side where the opening frame member 3 is located being considered the top and the side where the bottom wall 2 is located being considered the bottom. Furthermore, the inside and outside of the transport container 1 will be described with the side closer to the center of the transport container 1 being considered the inside and the side further away from the center being considered the outside.

[0013] As shown in Figures 2 and 3, the base wall 2 has a rectangular shape (specifically, a rectangular shape) in plan view. In each figure, the shorter side of the base wall 2 is indicated by X1, the longer side by Y1, and the vertical direction by Z1.

[0014] As shown in Figure 1, the opening frame member 3 has a rectangular ring shape (particularly rectangular) in plan view, and its outer shape in plan view is formed to be approximately the same as the outer shape of the bottom wall 2 in plan view, and its size is also approximately the same. The opening frame member 3 has a vertical penetration inside, and this penetration serves as the opening for loading and unloading items into the assembled transport container 1.

[0015] The side wall 4 extends upward from the periphery of the bottom wall 2 and forms a storage space 40 that is open at the top. Specifically, the side wall 4 has a pair of first side walls 5 provided along a pair of side portions of the bottom wall 2 and the mouth frame member 3, and a pair of second side walls 6 provided along a pair of side portions of the bottom wall 2 and the mouth frame member 3.

[0016] (2) Detailed structure of the bottom surface portion of the bottom wall The structure of the bottom surface portion 20 of the bottom wall 2 will be described. The bottom surface portion 20 means the bottom surface side portion of the bottom wall 2. The bottom surface portion 20 has a thin plate rectangular bottom wall base portion 19 (see FIGS. 5 to 7) as a base structure. Other structures of the bottom surface portion 20 described later are mainly formed on the lower surface of the bottom wall base portion 19. In FIGS. 2 to 6, the bottom surface portion 20 of the bottom wall 2 is directed upward in the figure.

[0017] (2-1) Horizontal planar portion As shown in FIGS. 2 and 3, the bottom surface portion 20 has, as a plurality of horizontal planar portions, a first horizontal planar portion 7, a second horizontal planar portion 8, a third horizontal planar portion 9, and a fourth horizontal planar portion 10. Here, the "horizontal planar portion" is a planar portion with a predetermined area facing downward, which coincides with the horizontal plane or has a slight inclination with respect to the horizontal plane. These horizontal planar portions are elongated strip-shaped in plan view and are arranged at the peripheral portion of the bottom surface portion 20. Further, these horizontal planar portions are arranged further downward from the lower surface of the bottom wall base portion 19 Ta-convex and are also surfaces. Specifically, the first horizontal planar portion 7 and the second horizontal planar portion 8 extend in the short side direction (X1) near the short side of the bottom wall 2, and the third horizontal planar portion 9 and the fourth horizontal planar portion 10 extend in the long side direction (Y1) near the long side of the bottom wall 2. More specifically, as shown in FIGS. 2 and 3, the first horizontal planar portion 7 and the second horizontal planar portion 8 extend to the vicinity of the long side of the bottom surface portion 20. On the contrary, the third horizontal planar portion 9 and the fourth horizontal planar portion 10 extend between the first horizontal planar portion 7 and the second horizontal planar portion 8 to a position separated from both. As a result of the above, in this embodiment, as shown in FIGS. 2 and 3, the first horizontal planar portion 7, the second horizontal planar portion 8, the third horizontal planar portion 9, and the fourth horizontal planar portion 10 are separated from each other.

[0018] The horizontal surface portion creates a surface on the bottom surface 20 of the bottom wall 2, which increases the contact area with the roller conveyor. This prevents the conveyor from slipping (rotating) when transporting the container 1 and also reduces noise.

[0019] For example, if the transport container 1 is placed on the roller conveyor so that its longitudinal direction (Y1) is the direction of movement, the third horizontal surface portion 9 and the fourth horizontal surface portion 10 will be the parts that mainly contact the roller conveyor. If the transport container 1 is placed on the roller conveyor so that its short direction (X1) is the direction of movement, the first horizontal surface portion 7 and the second horizontal surface portion 8 will be the parts that mainly contact the roller conveyor. In this way, horizontal surfaces are provided on both the long side and short side regions of the bottom surface portion 20, so the transport container 1 can be moved on the roller conveyor without worrying about its orientation.

[0020] The structure of the first horizontal surface portion 7 will be described in detail below. Note that the second horizontal surface portion 8, the third horizontal surface portion 9, and the fourth horizontal surface portion 10 have the same structure as the first horizontal surface portion 7, so their descriptions will be omitted.

[0021] As shown in Figures 4 to 6, the first horizontal portion 7 has a flat plate portion 21. The flat plate portion 21 is a plate-like portion that extends long in the short direction (X1), and has a lower surface 25 and an upper surface 26 that secures a space 27 with an inward opening between it and the bottom wall base portion 19. The space 27 is divided into multiple spaces in the short direction (X1) by the extensions 15a of the multiple first reinforcing ribs 15, which will be described later.

[0022] As shown in Figures 5 and 6, the lower surface 25 of the flat plate portion 21 has a first surface 23 and a second surface 24. The first surface 23 is a horizontal surface. The second surface 24 is formed continuously with respect to the outside of the first surface 23 and, although it is a flat surface, it is slightly inclined upwards as it moves outward from the bottom wall 2. SlopeIt is a surface. Because the flat plate portion 21 has a second surface 24 which is an inclined surface, the transport container 1 is less likely to get caught when it rides onto the roller conveyor. In addition, the worker can lift the transport container 1 by hand without feeling any pain.

[0023] As shown in Figures 5 and 6, the first horizontal section 7 further has a vertical wall section 22. The vertical wall section 22 extends upward from the outer edge of the flat section 21 and is connected to the bottom wall base section 19. In other words, the vertical wall section 22 extends downward from the lower surface of the bottom wall base section 19, and the flat section 21 further extends inward from the lower end of the vertical wall section 22. Thus, the first horizontal section 7 has an L-shaped cross-section due to the flat section 21 and the vertical wall section 22, resulting in high rigidity. Therefore, the first horizontal section 7 is less likely to be damaged even if struck by a roller conveyor or the like. As shown in Figure 6, the vertical wall section 22 has a straight wall section 221 that is connected to the bottom wall base section 19. The straight wall section 221 has a straight cross-section that extends in the vertical direction. This makes it less likely for the components to come apart when stacked.

[0024] In the structure described above, each of the multiple spaces 27 in the first horizontal portion 7 is formed by a bottom wall base portion 19, a flat plate portion 21, a vertical wall portion 22, and extensions 15a (described later) of the first reinforcing ribs 15 on both sides in the short direction.

[0025] Since the first horizontal plane portion 7 has a space 27, sound enters the space 27, contributing to noise attenuation.

[0026] The first horizontal section 7, which has an inwardly open space 27 as described above, is formed using an internal slide of the mold. By using an internal slide in this way, the R1 (see Figure 6) of the angle of the connecting portion between the flat section 2121 and the vertical wall section 22 can be increased, making it less likely to get caught on conveyors, etc., and less likely to be damaged. Note that the R1 of the vertical wall section 22 is larger than the R of the intersections of other ribs (for example, the R2 of the corner between the frame rib 31 and the bottom wall base section 19 in Figure 6).

[0027] The corners of the vertical wall portion 22 may be formed with a C-chamfer or other chamfer. The angle of these chamfers may be any degree.

[0028] As shown in Figures 4 to 6, the first horizontal surface 7, the second horizontal surface 8, the third horizontal surface 9, and the fourth horizontal surface 10 are provided with a flat outer peripheral surface 32 located above the aforementioned flat plate-like portion (for example, the flat plate-like portion 21). The outer peripheral surface 32 is also the lower surface of the bottom wall base portion 19. The outer peripheral surface 32 is the fitting portion when the transport containers 1 are stacked.

[0029] (2-2) Frame Rib As shown in Figures 2 to 6, the bottom portion 20 has frame ribs 31. The frame ribs 31 are rectangular ribs and are provided on the lower surface of the bottom wall base portion 19, spaced apart from the first horizontal portion 7, the second horizontal portion 8, the third horizontal portion 9, and the fourth horizontal portion 10. The frame ribs 31 protrude downward from the bottom wall base portion 19.

[0030] (2-3) Reinforcement ribs As shown in Figures 2 and 3, the bottom portion 20 has a first reinforcing rib 15, a second reinforcing rib 16, a third reinforcing rib 17, and a fourth reinforcing rib 18. The first reinforcing rib 15, the second reinforcing rib 16, the third reinforcing rib 17, and the fourth reinforcing rib 18 are provided on the lower surface of the bottom wall base portion 19, inside the first horizontal surface portion 7, the second horizontal surface portion 8, the third horizontal surface portion 9, and the fourth horizontal surface portion 10, respectively, and outside the frame rib 31. The first reinforcing rib 15, the second reinforcing rib 16, the third reinforcing rib 17, and the fourth reinforcing rib 18 are provided continuously inside the first horizontal surface portion 7, the second horizontal surface portion 8, the third horizontal surface portion 9, and the fourth horizontal surface portion 10, respectively. The thickness of the above reinforcing ribs may be thicker or thinner than the diagonal grid ribs described later.

[0031] The first reinforcing rib 15 will be described in detail. Note that the second reinforcing rib 16, the third reinforcing rib 17, and the fourth reinforcing rib 18 are similar to the first reinforcing rib 15, so their descriptions will be omitted.

[0032] The first reinforcing ribs 15 are provided on the lower surface of the bottom wall base portion 19, inside the first horizontal portion 7. Multiple first reinforcing ribs 15 are arranged in the short direction (X1), and each extends in the long direction (Y1), connecting the flat plate portion 21 and the frame rib 31.

[0033] As shown in Figures 4 to 6, the lower end 28 of the first reinforcing rib 15 is formed flush with the lower surface 25 of the flat plate portion 21. In this way, since the lower surface 25 of the flat plate portion 21 and the lower end 28 of the first reinforcing rib 15 are flush, when transporting the transport container 1, the roller conveyor comes into contact not only with the lower surface 25 of the flat plate portion 21 but also with the lower end 28 of the first reinforcing rib 15. As a result, the posture of the transport container 1 is stabilized, the roller conveyor is less likely to get caught, and consequently, noise can be reduced.

[0034] As described above, each of the first reinforcing ribs 15 has an extension 15a that extends into the flat plate portion 21. As shown in Figures 5 and 6, the extension 15a connects the bottom wall base portion 19 and the flat plate portion 21, forming a plurality of spaces 27 separated in the short direction (X1) between the flat plate portion 21 and the bottom wall base portion 19.

[0035] As shown in Figure 3, the length B1 in the longitudinal direction (Y1) of the portion where the first reinforcing ribs 15 are exposed and form a space between them is longer than the length A1 in the longitudinal direction (Y1) of the flat plate portion 21. This is because the space 27 of the first horizontal portion 7 is formed by the mold of the inner slide.

[0036] As shown in Figure 3, the first reinforcing rib 15 has a trapezoidal portion C1 in plan view on the flat plate portion 21 side (although it is not explicitly shown as a trapezoid in Figure 3, it is a trapezoidal shape that narrows in width as it moves away from the first horizontal plate portion 7) and a straight portion D1 in plan view on the opposite side of the flat plate portion 21. A step E1 is provided at the boundary between the trapezoidal portion C1 in plan view and the straight portion D1 in plan view, with the step E1 descending from the trapezoidal portion C1 in plan view to the straight portion D1 in plan view. As shown in Figure 3, the step E1 is on the outside of the flat plate portion 21 and is exposed in plan view. The extension portion 15a within the flat plate portion 21 has a trapezoidal cross-section that widens in width as it goes outward, and is continuous with the trapezoidal portion C1 of the first reinforcing rib 15 in plan view to form a single trapezoid. In other words, the trapezoidal portion of one first reinforcing rib 15 is composed of a single trapezoid that extends continuously from the extension portion 15a to the trapezoidal portion C1 in plan view.

[0037] (2-4) Diagonal lattice rib As shown in Figures 2 and 3, the bottom portion 20 has diagonal grid ribs 11. The diagonal grid ribs 11 are provided in the central rectangular area of ​​the lower surface of the bottom wall base portion 19, specifically in the rectangular area inside the frame ribs 31. The diagonal grid ribs 11 protrude downward from the bottom wall base portion 19.

[0038] As shown in Figure 3, the diagonal lattice rib 11 has a first rib group 12, a second rib group 13, and a third rib group 14 in an area that is rectangular in shape.

[0039] The first rib group 12 (horizontal hatching portion) is formed in the central rectangular portion within the aforementioned rectangular area. Preferably, the area of ​​the first rib group 12 is 60% or more of the total area of ​​the diagonal lattice ribs 11.

[0040] The second rib group 13 (vertical hatched portion) is formed outside the first rib group 12 and surrounds the first rib group 12.

[0041] The third rib group 14 is formed outside the second rib group 13 and surrounds the second rib group 13.

[0042] The third rib group 14 connects the frame rib 31, the first reinforcing rib 15, the second reinforcing rib 16, the third reinforcing rib 17, and the fourth reinforcing rib 18 to the second rib group 13. As shown in Figures 4 to 6, the lower end of the third rib group 14 is at the same height as the lower end of the frame rib 31, the lower end 28 of the first reinforcing rib 15, the lower end of the second reinforcing rib 16, the lower end of the third reinforcing rib 17, and the lower end of the fourth reinforcing rib 18.

[0043] As shown in Figures 4 and 7, the lower end 29 of the first rib group 12 is lower (higher) than the lower end of the frame rib 31, the lower end 28 of the first reinforcing rib 15, the lower end of the second reinforcing rib 16, the lower end of the third reinforcing rib 17, and the lower end of the fourth reinforcing rib 18. In other words, the lower end 29 of the first rib group 12 (see Figure 7) is higher than the lower surface 25 of the flat plate portion 21.

[0044] The second rib group 13 connects the third rib group 14 and the first rib group 12. The lower end of the second rib group 13 is connected to the third rib group as shown in Figure 4. 14 It slopes downwards (towards an upward position) from the first rib group 12.

[0045] (3) Transport operation Figure 7 illustrates the operation of transporting the transport container 1 on a roller conveyor. In Figure 7, the transport container 1 is positioned with its shorter side (X1) in the direction of transport on the roller conveyor. Note that only the bottom wall 2 of the transport container 1 is shown in Figure 7.

[0046] The lower surface 25 of the flat plate portion 21 of the first horizontal portion 7 of the transport container 1 (and the lower surface of the flat plate portion of the second horizontal portion 8) is in contact with the rotating roller 30 of the roller conveyor. On the other hand, the lower end 29 of the first rib group 12 is not in contact with the rotating roller 30. Therefore, noise during transport of the transport container 1 can be reduced while maintaining the bottom strength of the transport container 1.

[0047] 2. Second Embodiment In the first embodiment, horizontal plane Department It was manufactured so that an inwardly open space was formed by the internal sliding of the mold. On the other hand, horizontal Department It may be manufactured so as to form an outwardly open space by an external sliding of the mold.

[0048] An example of such a configuration will be described as the second embodiment using Figures 8 to 10. Since the basic structure of the second embodiment is the same as that of the first embodiment, the explanation will focus on the differences.

[0049] In the second embodiment, unlike the first embodiment, the horizontal plane is continuous at the outer peripheral edge of the bottom surface portion 20A of the bottom wall 2A, resulting in a continuous rectangular shape overall.

[0050] As shown in Figures 8 and 9, the first horizontal surface portion 7A and the fourth horizontal surface portion 10A are connected at the corners of the bottom surface portion 20A.

[0051] The first horizontal surface portion 7A has a plurality of inwardly open spaces 27, similar to the first embodiment.

[0052] Furthermore, the first horizontal portion 7A has an outwardly open space 41 at its short-side end. The space 41 is formed by the bottom wall base portion 19, the flat plate portion 21A, the rib 44 extending from the inner edge of the flat plate portion 21A and connected to the bottom wall base portion 19, the extension 15a of the first reinforcing rib 15, and the boundary rib 42 extending along the boundary between the first horizontal portion 7A and the third horizontal portion 9A. As shown in Figure 10, the flat plate portion 21A has a lower surface 25A and an upper surface 26A that secures an inwardly open space 41 between it and the bottom wall base portion 19. As shown in Figure 10, the lower surface 25 of the flat plate portion 21 has a first surface 23A and a second surface 24A. The first surface 23A is a horizontal plane. The second surface 24A is formed continuously with the outside of the first surface 23A and, although it is a plane, it is slightly inclined upwards as it moves outward from the bottom wall 2. SlopeIt is a surface. As shown in Figure 10, the flat plate portion 21A is thicker than the flat plate portion 21 and is less prone to damage. An inclined surface 241 is formed on the outer edge of the flat plate portion 21A, which is continuous with the second surface 24A. Specifically, the inclined surface 241 has a smoothly curved cross-section. Because the flat plate portion 21A has the inclined second surface 24A and the inclined surface 241 in this way, the transport container 1 is less likely to get caught when it rides onto the roller conveyor. In addition, the worker can lift the transport container 1 by hand without feeling any pain.

[0053] Space 41, like space 27, has the function of attenuating noise.

[0054] The fourth horizontal section 10A, like the first horizontal section 7A, has an outwardly open space 43 at its longitudinal end. The space 43 is formed by the bottom wall base section 19, the flat plate section 46, the rib 45 extending from the inner edge of the flat plate section 46 and connected to the bottom wall base section 19, the extension 18a of the fourth reinforcing rib 18, and the boundary rib 42.

[0055] In this embodiment, by using not only the inwardly open space 27 but also the outwardly open spaces 41 and 43, a horizontal surface can be made continuous on the outer peripheral edge of the bottom surface 20 of the bottom wall 2. As a result, no matter whether the transport container 1 is moved in the short or long direction relative to the roller conveyor, the roller conveyor always comes into contact with the horizontal surface, thus reducing noise.

[0056] 3. Variant The embodiments described above are only a few of the various embodiments of this disclosure. The embodiments described above can be modified in various ways depending on the design, etc., as long as the objectives of this disclosure are achieved. The following lists some modifications of the embodiments described above. The modifications described below can be combined and applied as appropriate.

[0057] (1) Modified example of the overall structure of a transport container The transport container may be a single-piece molded container.

[0058] The size, shape, and material of each component of the transport container are not limited. For example, the transport container is made of polypropylene, but it may also be made of other synthetic resin materials such as polyethylene, PET, or polyamide. Furthermore, the transport container may be formed from a composite material of synthetic resin and other components, or from a material that does not contain synthetic resin.

[0059] The bottom wall does not have to be rectangular in shape when viewed from above; it can be square.

[0060] The bottom wall may be a component formed by injection molding, and may, for example, be attached to a container made of a hollow structure.

[0061] (2) Modified shape of the horizontal surface In the first embodiment, the horizontal surface was formed by inward sliding, and in the second embodiment, the horizontal surface was formed by both inward and outward sliding. As a modification, the entire horizontal surface may be formed by outward sliding.

[0062] When the horizontal plane is formed by inward and outward sliding, the combination of the two is as appropriate. For example, the horizontal plane along the long side may be formed by inward sliding, and the horizontal plane along the short side may be formed by outward sliding. Another example is that the first and third horizontal planes may be formed by inward sliding, and the second and fourth horizontal planes may be formed by outward sliding.

[0063] In the first and second embodiments, the horizontal surface was formed around the entire circumference of the bottom. However, the horizontal surface only needs to provide protection for part, most, or all of the diagonal ribs, so it may be provided in one place on the bottom or divided into multiple places on the bottom. Furthermore, the horizontal surface may be provided in a band shape at only two places near the long side of the bottom, or at only two places near the short side of the bottom.

[0064] Drainage holes may be provided in one or both of the flat plate portion 21 and the vertical wall portion 22. This allows water to be easily drained even if it enters the space of the first horizontal plate portion 7.

[0065] In the second embodiment, the horizontal surface may be widened by providing ribs on the lateral sides of the flat plate-like portions 21 and 46 formed by the external slide using gas.

[0066] (3) Modified examples of reinforcing ribs and diagonal ribs The lower end 28 of the first reinforcing rib 15 may be formed to be lower than the lower surface 25 of the flat plate portion 21. In that case, the lower ends of all the diagonal ribs will be lower than the lower surface 25 of the flat plate portion 21.

[0067] The lower surface 25 of the flat plate portion 21 has a second surface 24, which is an inclined plane, but the second surface may also be an inclined curved surface. Alternatively, the second surface (inclined surface) may be omitted, and the entire lower surface may be a horizontal surface.

[0068] 4. Appearance This specification discloses the following aspects:

[0069] The transport container (1) according to the first embodiment comprises a bottom wall (2), a side wall (4), and a flat plate portion (21). The side wall (4) extends upward from the periphery of the bottom wall (4) and forms a storage portion (40) that is open at the top. The flat plate portion (21) is positioned on the periphery of the bottom surface side of the bottom wall (2). The flat plate portion (21) has a lower surface (25) and an upper surface (26) that secures a space (27) between the bottom surface (19) of the bottom wall (2) and the outer side opposite the center of the bottom wall (4).

[0070] In this embodiment, when the transport container (1) is transported, for example, on a roller conveyor, the part that comes into contact with the roller conveyor becomes a flat plate-shaped part (21), thus reducing noise during transport.

[0071] In the transport container (1) according to the second embodiment, the lower surface (24) of the flat plate portion (21) is inclined upward as it moves outward. The inclination angle of the lower surface (24) is 1° to 5°, preferably 2° to 4°. By making the inclination gentle, the angle at which the roller conveyor and the flat plate portion come into contact is reduced (compared to when the angle is large), thereby reducing the impact and the impact noise.

[0072] In this embodiment, since the lower surface (24) of the flat plate portion (21) is inclined, the transport container (1) can be smoothly placed on, for example, a roller conveyor.

[0073] In the third embodiment of the transport container (1), a vertical wall portion (22) is further provided that extends upward from the outer edge of the flat portion (21) in the first or second embodiment.

[0074] In this embodiment, the flat plate portion (21) and the vertical wall portion (22) create an L-shaped cross-sectional structure, which increases the rigidity of the structure and makes it less susceptible to damage, for example, when it collides with a roller conveyor.

[0075] The transport container (1) according to the fourth embodiment further comprises, in any one of the first to third embodiments, a reinforcing rib (15) provided continuously on the bottom side of the bottom wall (2) toward the center of the flat plate portion (21). The lower end (28) of the reinforcing rib (15) is formed to be flush with or lower than the lower surface (25) of the flat plate portion (21).

[0076] In this embodiment, when the transport container (1) is transported, for example, on a roller conveyor, not only the lower surface (25) of the flat plate portion (21) but also the lower end (28) of the reinforcing rib (15) can come into contact with the roller conveyor. Therefore, the posture of the transport container (1) during transport is stabilized.

[0077] The transport container (1) according to the fifth embodiment further comprises, in any one of the first to fourth embodiments, an oblique rib (12) provided on the bottom side of the bottom wall (2). The lower end (29) of the oblique rib (12) is above the lower surface (25) of the flat plate portion (21).

[0078] In this embodiment, when the transport container (1) is transported, for example, on a roller conveyor, the roller conveyor does not come into contact with the inclined ribs (12). Therefore, noise during the transport of the transport container (1) is reduced. [Explanation of Symbols]

[0079] 1: Transport container 2: Bottom wall 4: Side wall 7: First horizontal plane part 8:Second horizontal plane part 9:Third horizontal plane part 10: 4th horizontal plane part 11: Lattice Rib 12: First rib group 13: Second rib group 14: Third Rib Group 15: First reinforcing rib 16: Second reinforcing rib 17: Third reinforcing rib 18: Fourth reinforcing rib 19: Bottom wall base 21: Flat plate part 22:Vertical wall part 24:Second side 25: Bottom surface 26:Top surface 27: Space 28: Bottom edge 29: Bottom edge 40: Storage space

Claims

1. The bottom wall and, A side wall extending upward from the periphery of the bottom wall and forming a storage compartment with an opening at the top, A flat plate-shaped portion is arranged on the peripheral edge of the bottom surface of the bottom wall, A transport container equipped with, The flat plate portion has a lower surface and an upper surface that secures a space between it and a part of the bottom surface of the bottom wall, with the center of the bottom wall being open. The transport container further comprises vertical wall portions extending upward from the outer edge opposite to the center of the flat plate portion. A container for transport.

2. The bottom wall and A side wall extending upward from the periphery of the bottom wall and forming a storage compartment with an opening at the top, A flat plate-shaped portion is arranged on the peripheral edge of the bottom surface of the bottom wall, A transport container equipped with, The flat plate portion has a lower surface and an upper surface that secures a space between it and a part of the bottom surface of the bottom wall, with the central side of the bottom wall or the outer side opposite to the central side being open. The flat plate portion is rectangular in shape when viewed from below, At the corner of the flat plate portion, the upper surface of the flat plate portion secures a space with an open outer surface between it and the bottom surface of the bottom wall. In the remaining portion of the flat plate-shaped part excluding the corner portion, the upper surface of the flat plate-shaped part secures a space between itself and the bottom surface of the bottom wall, with the center side open. A container for transport.

3. The lower surface of the flat plate portion is inclined upward as it moves outward, A transport container according to claim 1 or 2.

4. The bottom wall further includes reinforcing ribs that are continuously provided on the bottom surface side of the flat plate-shaped portion towards the center side, The lower end of the reinforcing rib is formed to be flush with or lower than the lower surface of the flat plate-like portion. A transport container according to claim 1 or 2.

5. The bottom wall is further provided with diagonal ribs on the bottom surface side, The lower end of the diagonal rib is above the lower surface of the flat plate-like portion. A transport container according to claim 1 or 2.

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