JP6330654B2 - Cuboid container and stacking structure - Google Patents

Description

  The present invention relates to a rectangular parallelepiped container, and more particularly to a rectangular parallelepiped container capable of storing waste that requires long-term storage. Further, the present invention relates to a stacked structure in which a plurality of rectangular parallelepiped containers are arranged so as to be adjacent to each other in the horizontal direction and are stacked in a plurality of stages in the vertical direction.

  Some types of waste, such as radioactive waste, that can have a significant negative impact on the environment if leaked to the outside world, can be stored for a long period of time in a properly controlled facility. is necessary.

  Since facilities that store waste that requires long-term storage are more expensive than the final disposal site for ordinary waste, it is preferable to avoid dead space in the storage space as much as possible. In order to do so, the shape of the container for storing the waste is preferably a rectangular parallelepiped.

  Examples of the container that has a rectangular parallelepiped shape and that can store waste for a long period include the containers described in Patent Documents 1 to 3.

  However, the containers described in Patent Documents 1 and 2 have a structure in which a frame body is provided on each side of a rectangular parallelepiped container, and a plate-like body is attached to the frame body. Because there are many, cost becomes high.

  Although the container described in Patent Document 3 is a rectangular parallelepiped container, a frame is not provided on each side, and in this respect, it is considered that the container described in Patent Documents 1 and 2 is advantageous in terms of cost. The container described in Patent Document 3 needs to use a special manufacturing method such as centrifugal casting, which increases costs.

JP 2010-203073 A JP-A-5-278804 JP 2011-133430 A

  This invention is made | formed in view of this point, Comprising: It aims at providing the rectangular parallelepiped container which can store the waste which needs long-term storage at lower cost than before.

  The present invention solves the above problems by the following rectangular parallelepiped containers and stacked structures.

  That is, a rectangular parallelepiped container according to the present invention includes a rectangular parallelepiped box having four side plates and one bottom plate and having an upper opening, and a lid closing the upper opening of the box. It is a rectangular parallelepiped container, and the shape of the lid in the surface direction is substantially the same as the shape of the bottom plate in the surface direction, and the four side plates and one bottom plate of the box have a shape in the surface direction of each side. It is made of a steel plate having a rectangular shape of 1 to 2 m and a thickness of 2 to 5 mm, and the adjacent side plates are directly connected to each other without any other member, and each of the four side plates is another member. It is a rectangular parallelepiped container characterized in that it is directly connected to the bottom plate without interposing it.

  Of the connection between the adjacent side plates and the connection between the side plate and the bottom plate, at least a portion of the connections may be made by welding, and the connection between the adjacent side plates and the connection between the side plate and the bottom plate. Among the connections, at least a part of the connections may be made by bending one steel plate.

  The box preferably has air-tightness at portions other than the upper opening.

  Preferably, a plurality of elongated members are attached to the lower surface of the bottom plate at intervals from each other in a direction parallel to any one of the sides in the surface direction of the bottom plate. It is preferable that a rubber member capable of buffering the horizontal force is attached to the lower surface of the long member.

  On the upper surface of the lid body, stoppers capable of sandwiching the long member in the short direction thereof are respectively provided on the outer edge portions facing the lid body, and the lid body of the box body is provided. When the state of being placed so as to cover the opening is seen through from above, the position closer to the center of the box than the respective stopper is closer to the stopper, or the stopper is more than the stopper. It is preferable that a protrusion is provided on the side of the long member in the vicinity of the stopper at a position closer to the outside of the box.

  It is preferable that the belt plate is attached in a direction substantially orthogonal to the long member so that the lower portions of the side portions of the long member attached to the lower surface of the bottom plate are both ends.

  It is preferable that a vertical stiffening member is vertically attached to the outer surface of the side plate.

  It is preferable that the vertical stiffening member is provided with a through-hole penetrating in a horizontal direction parallel to the outer surface of the side plate to which the vertical stiffening member is attached.

  A flange may be formed along the upper side of the side plate so that the lid can be attached to the flange.

  It is preferable that the rectangular parallelepiped container can be stacked in a plurality of stages in the vertical direction.

  The stacked structure according to the present invention is a stacked structure in which a plurality of the above rectangular parallelepiped containers are arranged so as to be adjacent to each other in the horizontal direction and are stacked in a plurality of stages in the vertical direction, and are adjacent to each other in the vertical direction. The rectangular parallelepiped container has a stacked structure in which horizontal movements are mutually restrained by the stopper, the long member, and the protrusion of the long member.

  In the stacked structure, a vertical stiffening member is vertically attached to an outer surface of a side plate of the rectangular parallelepiped container, and the rectangular parallelepiped containers adjacent in the horizontal direction are perpendicular to the rectangular parallelepiped container. Of the stiffening members, vertical stiffening members that are close to each other in the horizontal direction are preferably connected in the horizontal direction by connecting each other through a connecting member.

  According to the rectangular parallelepiped container according to the present invention, it is possible to provide a rectangular parallelepiped container capable of storing waste that needs to be stored for a long period of time at a lower cost than conventional ones.

The perspective view which looked at the rectangular parallelepiped container which concerns on embodiment of this invention from diagonally upward The top view which looked at the rectangular parallelepiped container which concerns on embodiment of this invention from upper direction III-III sectional view of FIG. Sectional view taken along line IV-IV in FIG. VV sectional view of FIG. The figure which shows the condition which has lifted the rectangular parallelepiped container 10 upward using the crane The perspective view which looked at the rectangular parallelepiped container which concerns on embodiment of this invention from diagonally downward Cross-sectional view of the long member 20 (a state in which the rubber member 24 is sheared and deformed by a horizontal force due to an earthquake) It is a figure which shows the specific example at the time of transporting the rectangular parallelepiped container 10, (a) is a figure which shows the state which loaded the rectangular parallelepiped container 10 on the truck 40, (b) is a forklift of the rectangular parallelepiped container 10 The figure which shows the state currently loaded in the truck 40 using 42 The figure which shows the condition which has piled up the rectangular parallelepiped container which concerns on embodiment of this invention in a storage facility. The perspective view which looked at the rectangular parallelepiped container which concerns on embodiment of this invention from diagonally upward It is a figure which expands and shows the XII part of FIG. 11, (a) is the side view seen from the horizontal direction where the elongate member 20 extends, (b) is from the horizontal direction orthogonal to the direction where the elongate member 20 is extended. Side view The side view which shows the stacked structure formed by stacking the rectangular parallelepiped container which concerns on embodiment of this invention in 3 steps | paragraphs The figure which expands and shows the XIV part of FIG. An enlarged view of an example of a connection structure XVI-XVI sectional view of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view of a rectangular parallelepiped container 10 (hereinafter simply referred to as “container 10”) according to an embodiment of the present invention as viewed obliquely from above, and FIG. 2 is an embodiment of the present invention. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2, and FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 5 is a cross-sectional view taken along line VV in FIG. However, for convenience of illustration, the stopper 26 is not drawn in the part a of FIG. 5, and the stopper 26 of the lower container 10 is drawn in the part b of FIG. 5.

  As shown in FIGS. 1-5, the rectangular parallelepiped container 10 which concerns on this embodiment is provided with the box 11 which the upper part opened, and the cover body 16 which block | closes the upper opening of this box 11, The box 11 has four side plates 12 and one bottom plate 14 and is formed in a rectangular parallelepiped shape.

  The four side plates 12 and the one bottom plate 14 are steel plates each having a rectangular shape with sides of 1 to 2 m and a thickness of 2 to 5 mm, but the adjacent side plates 12 do not intervene with other members. The four side plates 12 are directly connected to the bottom plate 14 without interposing other members.

  In the present embodiment, the four side plates 12 and one bottom plate 14 are cut with a high-precision laser, and a high-precision dimensional accuracy is realized. For this reason, the box 11 with high dimensional accuracy can be obtained only by connecting the adjacent side plates 12 by welding and connecting the four side plates 12 and one bottom plate 14 by welding. For this reason, the rectangular parallelepiped container 10 according to the present embodiment does not require a frame, can be manufactured with a simpler manufacturing process than a conventional container using a frame, and is manufactured at a lower cost than the conventional one. And the working time can be greatly shortened. Moreover, since the rectangular parallelepiped container 10 which concerns on this embodiment does not use a frame like the conventional container, and uses the thin steel plate whose thickness is 2-5 mm, it is a viewpoint of material cost. Therefore, it can be manufactured at a lower cost than in the past. Moreover, since the frame is not used, it can also be reduced in weight compared with the conventional container.

  On the other hand, in a conventional container using a frame, after the work of assembling a frame using a shape steel is performed, the frame is reversed during the manufacture of the container in order to attach the steel plate to the frame by welding. There was a need. For this reason, it took time to assemble the container, and it also took time to correct the welding distortion.

  In the present embodiment, adjacent side plates 12 are connected by welding, and the side plate 12 and the bottom plate 14 are also connected by welding. However, as long as dimensional accuracy can be ensured, the connection is limited to welding. However, the connection between the side plates 12 adjacent to each other and the connection between the side plate 12 and the bottom plate 14 may be performed by bending, for example, one steel plate.

  Moreover, in this embodiment, it welds so that airtightness may be maintained in the connection location of the adjacent side plates 12 and the connection location of the side plate 12 and the bottom plate 14. For this reason, the container 10 according to the present embodiment can also store a liquid. However, when not storing liquid and storing things that do not need to ensure airtightness, airtightness is required at the connection between adjacent side plates 12 and at the connection between the side plate 12 and the bottom plate 14. It is not always necessary to connect them so that

  A vertical stiffening member 12 </ b> A is vertically attached to the outer surface of the side plate 12, and the side plate 12 is stiffened. For this reason, even if a thin steel plate having a thickness of 2 to 5 mm is used for the side plate 12, it is possible to load the side plate 12 with a load, and it is not necessary to load the frame with a load. Yes. For this reason, the container 10 according to the present embodiment can be stacked in a plurality of stages without using a frame.

  Since the mounting position of the vertical stiffening member 12A on the outer side surface of the side plate 12 and the dimensional accuracy of the vertical stiffening member 12A itself can be controlled in units of several centimeters, a sufficient stiffening effect can be obtained. This contributes to reducing the cost of manufacturing the container 10 according to the embodiment.

  Further, the vertical stiffening member 12A is provided with a through hole 12A1 penetrating in a horizontal direction parallel to the outer surface of the side plate 12 to which the vertical stiffening member 12A is attached (FIG. 3). A lifting jig 30 can be attached to the through hole 12A1, and as shown in FIG. 6, a wire 32 is attached to the lifting jig 30 attached to the through hole 12A1, thereby using a crane. The container 10 can be lifted upward.

  A mountain-shaped member is attached to the upper end portion of the side plate 12 to form a flange 12B. The flange 12B is provided with a plurality of through-holes 12C, and the through-holes 16A are also provided on the outer edge of the lid body 16 so as to correspond to the positions of the plurality of through-holes 12C (FIG. 2). ). The lid 16 is connected to the flange of the box 11 via a packing material or a gasket material so that the lid 16 closes the opening at the top of the box 11 and the positions of the through holes 12C and the through holes 16A coincide. After being arranged on 12B, the lid body 16 can be attached to the box body 11 by fastening through the bolt 18 so as to penetrate the through hole 12C and the through hole 16A. In FIG. 2, it is difficult to distinguish and illustrate the through hole 12C, the through hole 16A, and the bolt 18. Therefore, for convenience, the reference numerals 12C, 16A, and 18 indicate the same part.

  In this embodiment, the flange 12B is formed by the chevron member. However, the member used for forming the flange 12B is not limited to the chevron member. For example, the flange 12B is formed by using an L-shaped member or a flat member. May be formed.

  A plurality of long members 20 are attached to the lower surface of the bottom plate 14 at intervals from each other in a direction parallel to any one of the sides in the surface direction of the bottom plate 14 (FIG. 3). Therefore, in a state where the container 10 is placed on the ground or a state where it is placed on another container 10, a space is secured below the bottom plate 14 of the container 10. The arm of the forklift can be inserted into the space so that it can be easily transported by the forklift.

  Further, a band plate 22 is attached to the lower portion of the side portion of the long member 20 in a direction substantially perpendicular to the long member 20 so that the side portions of the long member 20 are both ends (see FIG. 4). For this reason, the bottom plate 14 is located above the arm of the forklift inserted into the space below the bottom plate 14 of the container 10, and the strip plate 22 is located below. Therefore, the container 10 lifted by inserting the arm of the forklift into the space below the bottom plate 14 of the container 10 can be turned upside down, and the inside of the container 10 can be easily discharged to the outside. ing.

  Further, a rubber member 24 (see FIGS. 7 and 8) capable of buffering a horizontal force is attached to the lower surface of the long member 20, and the container 10 is stacked in a plurality of stages as will be described later. The seismic performance is improved.

  In addition, although the shape of the elongate member 20 is not specifically limited, From a viewpoint of weight reduction, it is preferable to use a square steel pipe with a hollow inside.

  The shape of the lid body 16 is substantially the same as the shape of the bottom plate 14 in the surface direction, so that the opening at the top of the box body 11 can be closed, and is a steel plate having a thickness of 2 to 5 mm. It is configured.

  A reinforcing brace 16B is provided on the lower surface of the lid 16 for stiffening. The shape of the reinforcing brace 16B is not particularly limited, but for example, a chevron member can be used as the reinforcing brace 16B.

  Further, as shown in FIG. 1, a handle 16 </ b> C is provided at the opposing outer edge portion of the upper surface of the lid body 16 so that the lid body 16 can be easily opened and closed.

  As described above, the through-hole 16 </ b> A is provided in the outer edge portion of the lid body 16. The lid 16 is connected to the flange of the box 11 via a packing material or a gasket material so that the lid 16 closes the opening at the top of the box 11 and the positions of the through holes 12C and the through holes 16A coincide. After being arranged on 12B, the lid body 16 can be attached to the box body 11 by fastening through the bolt 18 so as to penetrate the through hole 12C and the through hole 16A.

  Further, on the upper surface of the lid body 16, stoppers 26 capable of sandwiching the long member 20 in the lateral direction when the containers 10 are stacked are provided on the opposing outer edge portions of the lid body 16. . Further, when the state in which the lid body 16 is placed so as to cover the opening of the box body 11 is seen through from above, the position closer to the center of the box body 11 than each stopper 26 is closer to each stopper 26. A protrusion 20 </ b> A is provided on the side of the long member 20.

  For this reason, even if a horizontal force due to an earthquake is applied to the containers 10 stacked up and down, the stopper 26 of the lower container 10 interferes with the long member 20 and the protruding portion 20A of the upper container 10, and thus the containers stacked up and down. The horizontal movement of 10 is constrained to each other, and even when the containers 10 are stacked up and down, the structure is strong against horizontal force caused by an earthquake.

  The shape of the stopper 26 and the protrusion 20A is not particularly limited as long as it has strength and rigidity that can resist the seismic force assumed in the design, but in this embodiment, the stopper 26 is configured by assembling steel plates. The projecting portion 20A is a chevron member (see FIGS. 1, 11, 12A, 12B, etc.).

  The mounting position of the protrusion 20A is not limited to the above position as long as it does not impair the action of restraining the horizontal movement of the containers 10 stacked one above the other. When the state of being placed so as to cover the opening of 11 is seen through from above, the side portion of the long member 20 is closer to each stopper 26 at a position closer to the outside of the box 11 than each stopper 26. A protrusion 20A may be provided on the surface.

  Further, as shown in FIG. 7 (a perspective view of the rectangular parallelepiped container 10 viewed obliquely from below) and FIG. 8 (a diagram showing a state in which the rubber member 24 is sheared and deformed by the horizontal force due to the earthquake) A rubber member 24 capable of buffering the horizontal force is attached to the lower surface of the long member 20, and the rubber member 24 can absorb the horizontal force due to the earthquake to some extent. This contributes to improving the earthquake resistance of the container 10 when stacked. In addition, in FIG. 8, the code | symbol 16 has shown the cover body of the container 10 located below.

  As described above, the rectangular parallelepiped container 10 according to the present embodiment has been described for each member. In the following, a specific example of transporting the container 10, a specific example of stacking the containers 10 in a storage facility, and a container A configuration that contributes to improving the earthquake resistance of the stacked structure 50 configured by stacking 10 in a plurality of stages will be described.

  FIG. 9A is a diagram illustrating a state where the container 10 is loaded on the truck 40, and FIG. 9B is a diagram illustrating a state where the container 10 is loaded on the truck 40 using the forklift 42.

  As described above, a plurality of long members 20 are attached to the lower surface of the bottom plate 14 of the container 10 at intervals from each other in a direction parallel to any one of the sides in the surface direction of the bottom plate 14. ing. Therefore, in a state where the container 10 is placed on the ground or a state where it is placed on another container 10, a space is secured below the bottom plate 14 of the container 10. The arm of the forklift can be inserted into the space so that it can be easily transported by the forklift.

  Further, since the length of each side of the container 10 is about 1 to 2 m, the container 10 can be loaded onto the truck 40 from both sides using a forklift 42 as shown in FIG.

  FIG. 10 is a diagram illustrating a state in which the containers 10 are stacked in the storage facility. By using the forklift 44 with a three-stage full free mast, the containers 10 can be stacked up to a height of 6 m. When the height of the containers 10 is about 1 m, the containers 10 can be stacked up to six levels.

  FIG. 11 is a perspective view of the container 10 as viewed obliquely from above, and FIG. 12 is an enlarged view of the portion of the stopper 26 (portion XII in FIG. 11) of the container 10 (FIG. 12A shows the long member 20). 12B is a side view seen from the horizontal direction in which FIG. 12B extends, and FIG. 12B is a side view seen from the horizontal direction orthogonal to the direction in which the long member 20 extends. In addition, in FIG. 12, each part of the container 10 stacked on the container 10 shown in FIG. 11 is also illustrated.

  As is clear from FIGS. 12A and 12B, even when a horizontal force due to an earthquake is applied to the vertically stacked containers 10, the stopper 26 of the lower container 10 is the long member 20 of the upper container 10. Since the rectangular parallelepiped containers 10 adjacent to each other in the vertical direction are constrained to move in the horizontal direction, even when the containers 10 are stacked up and down, It has a strong structure.

  As is apparent from FIGS. 11, 12 (a) and 12 (b), in the present embodiment, the long member 20 is a square steel pipe having a square cross section, and the stopper 26 is a steel plate. A member formed by assembling is used, and a mountain-shaped member is used as the protruding portion 20A.

  FIG. 13 is a side view showing a stacked structure 50 in which the containers 10 are stacked in three stages, and FIG. 14 shows a portion (XIV portion in FIG. 13) connecting the containers 10 adjacent in the horizontal direction in the horizontal direction. FIG.

  As described above with reference to FIGS. 12 (a) and 12 (b), the stopper 26 of the lower container 10 is longer than the upper container 10 even when a horizontal force is applied to the stacked containers 10 due to an earthquake. In order to interfere with the member 20 and the protrusion 20A, horizontal movements of the rectangular parallelepiped containers 10 adjacent in the vertical direction are mutually restrained. For this reason, the stacked structure 50 is a structure in which the containers 10 are stacked in a plurality of stages, but has a structure that is strong against a horizontal force caused by an earthquake.

  Further, as described above, the vertical stiffening member 12A attached to the side plate 12 in the vertical direction is provided with a through hole 12A1 penetrating in the horizontal direction parallel to the outer surface of the side plate 12 to which the side stiffener 12 is attached. ing. For this reason, among the vertical stiffening members 12A of the containers 10 adjacent to each other in the horizontal direction, the vertical stiffening members 12A that are close to each other in the horizontal direction are connected to each other using a connecting member 52 and a bolt 54 as shown in FIG. In the stacked structure 50, the containers 10 adjacent in the horizontal direction are connected in the horizontal direction in this way. For this reason, the seismic performance of the stacked structure 50 itself is improved, and the individual containers 10 are prevented from falling. As shown in FIG. 14, the connecting member 52 has two through holes, but one of the through holes is a long hole 52 </ b> A, and is attached according to the interval between adjacent containers 10. Can be adjusted.

  In the stacked structure 50, the vertical stiffening members 12A adjacent to each other in the horizontal direction among the vertical stiffening members 12A of the containers 10 adjacent in the horizontal direction are connected to each other using the connecting member 52 and the bolt 54. However, instead of using the connecting member 52 and the bolt 54, through holes 12A1 between the vertical stiffening members 12A adjacent to each other in the horizontal direction among the vertical stiffening members 12A of the containers 10 adjacent to each other in the horizontal direction. The connection may be made using a wire.

  Further, as shown in FIGS. 15 and 16, hooks 60 may be attached to the side plate 12, and the hooks 60 of the containers 10 adjacent in the horizontal direction may be connected by a hammer 62.

  As described above, in the stacked structure 50, the horizontal movements of the rectangular parallelepiped containers 10 adjacent to each other in the vertical direction are mutually restrained by the stopper 26, the long member 20, and the protruding portion 20 </ b> A of the long member 20. In addition, the containers 10 adjacent in the horizontal direction are connected to each other in the horizontal direction. For this reason, the stacked structure 50 is an extremely strong structure against earthquakes.

DESCRIPTION OF SYMBOLS 10 ... Rectangular container 11 ... Box 12 ... Side plate 12A ... Vertical stiffening member 12A1, 12C, 16A ... Through-hole 12B ... Flange 14 ... Bottom plate 16 ... Lid 16B ... Reinforcement brace 16C ... Handle 18, 54 ... Bolt 20 ... long member 20A ... projection 22 ... band 24 ... rubber member 26 ... stopper 30 ... lifting jig 32 ... wire 40 ... truck 42 ... forklift 44 ... forklift with three-stage full free mast 50 ... stacked structure 52 ... Connecting member 52A ... Long hole 60 ... Hook 62 ... Kanuki

Claims (14)

A rectangular parallelepiped container comprising a rectangular parallelepiped box having four side plates and one bottom plate and having an upper opening, and a lid closing the upper opening of the box,
The shape in the surface direction of the lid is substantially the same as the shape in the surface direction of the bottom plate,
The four side plates and one bottom plate of the box are made of steel plates having a rectangular shape with sides of 1 to 2 m and a thickness of 2 to 5 mm, and the adjacent side plates are other members. And the four side plates are directly connected to the bottom plate without interposing other members, respectively .
A plurality of long members are attached to the lower surface of the bottom plate at intervals from each other in a direction parallel to any one of the sides in the surface direction of the bottom plate,
On the upper surface of the lid body, stoppers capable of sandwiching the long member in the short direction thereof are respectively provided on the outer edge portions facing the lid body, and the lid body of the box body is provided. When the state of being placed so as to cover the opening is seen through from above, the position closer to the center of the box than the respective stopper is closer to the stopper, or the stopper is more than the stopper. A rectangular parallelepiped container characterized in that a protrusion is provided on a side portion of the elongate member in the vicinity of the stopper at a position closer to the outside of the box . The rectangular parallelepiped container according to claim 1, wherein a vertical stiffening member is attached to the outer side surface of the side plate in the vertical direction. The rectangular parallelepiped container according to claim 2 , wherein the vertical stiffening member is provided with a through-hole penetrating in a horizontal direction parallel to an outer surface of the side plate to which the vertical stiffening member is attached. A rectangular parallelepiped container comprising a rectangular parallelepiped box having four side plates and one bottom plate and having an upper opening, and a lid closing the upper opening of the box,
The shape in the surface direction of the lid is substantially the same as the shape in the surface direction of the bottom plate,
The four side plates and one bottom plate of the box are made of steel plates having a rectangular shape with sides of 1 to 2 m and a thickness of 2 to 5 mm, and the adjacent side plates are other members. And the four side plates are directly connected to the bottom plate without interposing other members, respectively .
A vertical stiffening member is vertically attached to the outer surface of the side plate,
A rectangular parallelepiped container, wherein the vertical stiffening member is provided with a through-hole penetrating in a horizontal direction parallel to an outer surface of the side plate to which the vertical stiffening member is attached . A plurality of long members are attached to the lower surface of the bottom plate at intervals from each other in a direction parallel to any one of the sides in the surface direction of the bottom plate. 4. A rectangular parallelepiped container according to 4. The rectangular parallelepiped container according to any one of claims 1 to 5, wherein a rubber member capable of buffering a horizontal force is attached to a lower surface of the long member. The lower side of the elongated member attached to the lower surface of the bottom plate so as to both end portions, according to claim 1, characterized in that strip in a direction substantially orthogonal to the long length member is attached A rectangular parallelepiped container according to any one of -3, 5, and 6. Of consolidated and the side plate of the side plate adjacent the connection with a said base plate, a rectangular parallelepiped shaped container according to any one of claims 1 to 7, characterized in that at least part of the coupling is made by welding . Of consolidated and the side plate of the side plate adjacent the connection with a said base plate, according to any one of claims 1 to 8, characterized in that at least part of the coupling is made by bending a single steel plate A rectangular parallelepiped container. The rectangular parallelepiped container according to any one of claims 1 to 9 , wherein the box is airtight at portions other than the upper opening.   11. A rectangular parallelepiped container according to claim 1, wherein a flange is formed along an upper side of the side plate, and the lid can be attached to the flange.   The rectangular parallelepiped container according to any one of claims 1 to 11, which can be stacked in a plurality of stages in the vertical direction. A stacked structure in which a plurality of rectangular parallelepiped containers according to any one of claims 1 to 3 are arranged so as to be adjacent in the horizontal direction, and stacked in a plurality of stages in the vertical direction,
A stacked structure in which horizontal movements of the rectangular parallelepiped containers adjacent in the vertical direction are mutually restrained by the stopper, the long member, and the protrusion of the long member.   A vertical stiffening member is vertically attached to the outer surface of the side plate of the rectangular parallelepiped container, and the rectangular parallelepiped containers adjacent in the horizontal direction are horizontal among the vertical stiffening members of the rectangular parallelepiped container. The stacked structure according to claim 13, wherein the vertical stiffening members that are close to each other in the direction are connected to each other via a connecting member so as to be connected in the horizontal direction.