JP5317189B2 - Container with flap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container with flaps wherein the flaps can be held in a horizontal attitude. <P>SOLUTION: In the container 10, the flaps include: a pair of locking members 23 which can linearly move in a second horizontal direction H2; and an operating slider 24 interlocking with the locking members 23, 23. The front end parts of the locking members 23, 23 are engaged with locking holes 17, 17 of long side walls 12, 12, thereby holding the flaps 20 in the horizontal attitude. When the operating slider 24 operated by sliding, the locking members 23, 23 move toward each other so as to be disengaged from the locking holes 17, 17, thereby raising the flaps 20 in an upright attitude. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  In the present invention, a pair of flaps are rotatably connected to the upper surface opening of the container body. When both flaps are in a horizontal position, both ends of the upper surface opening of the container body are closed and only the central part is opened. It is related with the container with a flap which will be in a state and will make the whole upper surface opening open when both flaps are made into a standing posture.

  Conventionally, as a container with a flap of this type, a pair of flaps is rotatably provided at the upper edge of a pair of side walls in the container body, and both side edges of the flap are provided at the upper edge of the other pair of side walls. There is known a container that is placed to place a flap in a horizontal posture (see, for example, Patent Document 1).

JP 2003-205938 A (FIG. 1) JP-A-8-258842 (FIGS. 1 and 2)

  By the way, when the flap is in a horizontal posture, adjacent side walls are maintained in an orthogonal state by the flap, so that the torsional strength of the container body is increased. In particular, when the container main body has a structure that can be changed between the folded state and the assembled state, the flaps fit between the pair of side walls to prevent the side walls from falling down. Increases strength. However. In a conventional container, when it is twisted by an external force, the flap opens so as to be ejected from between a pair of side walls, which reduces the torsional strength of the container body and deforms it. As a result, it was impossible to maintain the assembled state, and it was possible for the package to spill. In addition, the conventional container described above has a problem that, for example, an internal baggage pushes up a flap from below to open it during transportation, and the baggage is likely to jump out of the container.

  This invention is made | formed in view of the said situation, and aims at provision of the container with a flap which can hold | maintain a flap in a horizontal attitude | position.

In order to achieve the above object, a container with a flap according to the invention of claim 1 is provided in a pair of upper edge portions of a pair of first side walls opposed to each other in the first horizontal direction in a container body of an open top box shape. When both flaps are in a horizontal position, they are fitted between a pair of second side walls opposed to each other in a second horizontal direction orthogonal to the first horizontal direction. In a container with a flap in which the entire upper surface opening is opened when both ends of the upper surface opening of the container main body are closed and only the central portion is opened, and both flaps are in a standing posture, both sides of the flap disposed section, and a lock portion of the reciprocable pair between the locking position protruding from the side surface of the flap and an unlocked position retracted to the side surface side of the flap from its locked position, a pair of lock Each flap is provided with a lock urging spring for urging the portion to the lock position and a lock release operation portion for moving the pair of lock portions to the lock release position against the urging force of the lock urging spring on the other hand, the second side wall of the pair engage the lock disposed in the locked position of the flap in the horizontal posture portion, as well as prohibit the rotation of the flap, the locking portion is operated to move the unlocked position Then, the lock engagement portion that releases the engagement with the lock portion and allows the flap to rotate is provided , and the first side wall and the second side wall are rotatable to the outer edge portion of the bottom wall of the container body. Connected, the container body is changed to an assembled state in which the first side wall and the second side wall are raised from the bottom wall and connected to each other, and a folded state in which the first side wall and the second side wall overlap the bottom wall. Possible and in its assembled state, the pair of second side walls is A pair of first side walls are fitted, protrude from both side edges of each first side wall to the pair of second side walls, and overlap the outer surfaces of the pair of second side walls in the assembled state. 2 A pair of connecting protrusions that prohibit the side walls from rotating outward from the standing posture are provided, and when the lock portion is pressed against the wall portion above the lock engagement portion of the second side wall from above, It is characterized in that it has a sliding contact slope that contacts and guides the lock portion from the lock position to the lock release position .
A container with a flap according to a second aspect of the invention has a pair of flaps rotatably connected to upper edge portions of a pair of first side walls opposed in the first horizontal direction in a container body having an open top box shape. When both flaps are in a horizontal posture, the container body is fitted between a pair of second side walls opposed to each other in a second horizontal direction orthogonal to the first horizontal direction. When both ends are closed and only the central part is open, and both flaps are in a standing position, in the container with flaps where the entire upper surface opening is opened, it is placed on both sides of the flaps, and from the side of the flaps A pair of lock portions capable of reciprocating between a protruding lock position and a lock release position retracted toward the side of the flap from the lock position, and a lock for biasing the pair of lock portions to the lock position Each of the flaps is provided with an urging spring and an unlocking operation portion for moving the pair of locking portions to the unlocking position against the urging force of the locking urging spring. The side surface engages with a lock portion disposed at the lock position of the flap in the horizontal posture, prohibits the flap from rotating, and moves the lock portion to the unlock position when the lock portion is moved. A pair of horizontal supports that are provided with a lock engaging portion that is released from engagement and allows the flap to rotate, and project laterally from a position shifted from the lock portion in the radial direction of the flap on the side surface of the flap. It has a feature in that a protrusion is provided and an upper surface open recess for receiving each horizontal support protrusion is formed at the upper end of each second side wall.

According to a third aspect of the present invention, in the container with a flap according to the first or second aspect , the pair of locking members that are linearly movable in the second horizontal direction are provided on the flap, and the locking members on the side away from each other are provided. A pair of lock portions are used as the end portions, and a pair of lock members are urged away from each other by a lock urging spring, and an operation slider that can be slid in the rotational radius direction of the flap is unlocked. The operation slider and the lock member are cam-coupled so that the pair of lock members come close to each other in conjunction with the slide operation of the operation slider against the urging force of the lock urging spring. A lock hole opened in the direction is provided on each second side wall as a lock engagement portion. When the lock portion is arranged at the lock position, the lock hole engages with the concave and convex portions, and the lock portion moves to the lock release position and locks. Characterized in place disengaged from the hole.

A container with a flap according to a fourth aspect of the present invention has a pair of flaps rotatably connected to upper edges of a pair of first side walls opposed in the first horizontal direction in a container body having an open top box shape. When both flaps are in a horizontal posture, the container body is fitted between a pair of second side walls opposed to each other in a second horizontal direction orthogonal to the first horizontal direction . In a container with a flap in which both ends are closed and only the center is open, and when both flaps are in a standing position, the entire upper surface opening is opened, a pair of engaged parts on both sides of the flap part is formed, the second side wall of the pair, to move between a lock position and an unlocked position, engages the engaged portion of the flap in the horizontal position when placed in the locked position Prohibit flap rotation and unlock position When placed location and side wall locking part which engages with the engaged portion to permit rotation of the released flap, and the side wall lock urging spring which urges the side wall side locking portion to the locked position Each flap is disposed on both sides of the flaps, and is capable of reciprocating between a lock permission position and a lock release action position, and the lock action part at the lock permission position. a lock biasing spring for biasing, and the unlocking operation portion for moving operating the locking action of the pair in the unlocked operating position against the biasing force of the lock biasing spring provided, a pair lock When the action part is disposed at the lock allowable position, the action part is abutted against the lock part on the side wall side in the lock position, and when the action part moves to the unlocking action position, the side wall side lock part is pressed and moved to the lock release position. Has characteristics.

According to a fifth aspect of the present invention, in the container with a flap according to the fourth aspect, the first side wall and the second side wall are rotatably connected to the outer edge portion of the bottom wall of the container main body. The assembled state in which the side wall and the second side wall are raised from the bottom wall and connected to each other and the folded state in which the first side wall and the second side wall overlap the bottom wall can be changed. The pair of second side walls is characterized in that it is configured to be fitted between the pair of first side walls.

[Inventions of Claims 1 and 2 ]
According to the flap-equipped container of claims 1 and 2 , the lock portions disposed at the lock positions on both sides of the flap in the horizontal posture are engaged with the lock engagement portions on the pair of second side walls of the container body. The rotation of the flap is prohibited, and the flap is held in a horizontal posture. Thereby, the twist strength of a container main body increases. Further, when the flap is in the standing posture, the lock release operation unit may be operated to move the lock unit to the lock release position. Thereby, engagement with a lock part and a lock engagement part is cancelled | released, rotation of a flap is accept | permitted, and a flap can be made into a standing posture.

[Invention of claim 3 ]
According to the container with a flap of claim 3 , the tip end portions of the pair of locking members are engaged with the lock holes provided in the pair of second side walls on both sides of the flap in the horizontal posture, and the rotation of the flap is prohibited. And the flap is held in a horizontal position. Further, when the flap is in the standing posture, the operation slider may be operated to bring the pair of lock members closer to each other. Thereby, the front-end | tip part of a lock member detach | leaves from a lock hole, rotation of a flap is accept | permitted, and a flap can be made into a standing posture.

[Invention of claim 4 ]
According to the container with a flap according to claim 4 , when the flap is in a horizontal posture, the pair of engaged portions on both sides of the flap are arranged on the side wall side disposed at the lock position on the pair of second side walls of the container body. Engagement with the lock portion prohibits rotation of the flap, and the flap is held in a horizontal position. Thereby, the twist strength of a container main body increases. Further, when the flap is in the standing posture, the unlock operation section is operated to move the pair of lock action portions on both sides of the flap from the lock permission position to the lock release action position. Then, the pair of locking action portions press the side wall side locking portion to move to the unlocking position, thereby releasing the engagement between the side wall side locking portion and the engaged portion and allowing the flap to rotate. And the flaps can be in an upright position.

[Invention of claim 5 ]
According to the structure of Claim 5 , the intensity | strength in the assembly state of the container main body which can be folded can be improved conventionally.

Further , according to the configuration of the fifth aspect, in the assembled state of the container main body, the flaps in the horizontal posture are fitted between the pair of second side walls so as to restrict the inclining of the second side walls. The pair of second side walls are fitted between the pair of first side walls to restrict the inclining of the first side walls. That is, the horizontal posture of the flaps restricts the rotation of both the first and second side walls, improving the strength of the container body in the assembled state.

The perspective view of the container which concerns on 1st Embodiment of this invention. Perspective view of container with flap in horizontal position Perspective view of the container in the folded state Exploded perspective view of the flap Exploded perspective view of the flap (A) Perspective view of flap in locked state, (B) Perspective view of flap in unlocked state The perspective view of the container which concerns on 2nd Embodiment (A) Perspective view of flap in locked state, (B) Perspective view of flap in unlocked state Exploded perspective view of the flap The partial expansion perspective view of the container concerning a 3rd embodiment Exploded perspective view of the flap (A) Perspective view of flap in locked state, (B) Perspective view of flap in unlocked state The partial expansion perspective view of the container concerning a 4th embodiment The perspective view of the unlocked state of the flap of the container (A) The exploded perspective view of the outer surface side of a flap, (B) The exploded perspective view of the inner surface side of a flap (A) Perspective view of flap in locked state, (B) Perspective view of flap in unlocked state (A) Partially broken perspective view of the flap in the locked state, (B) Partially broken perspective view of the flap in the unlocked state

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The container body 10H of the container 10 with a flap (hereinafter, simply referred to as “container 10”) of the present embodiment shown in FIG. 1 has a foldable structure. That is, the container main body 10H can turn a pair of short side walls 11 and 11 (corresponding to the “first side wall” of the present invention) to a pair of short side edges of the rectangular bottom wall 13. A pair of long side walls 12 and 12 (corresponding to the “second side wall” of the present invention) are rotatably connected to a pair of long side edges of the bottom wall 13. ing. Then, the container body 10H has an assembled state (see FIG. 1) in which the short-side and long-side side walls 11 and 12 are erected from the bottom wall 13 and connected to each other, and as shown in FIG. After folding the pair of long side walls 12, 12, it is possible to change to a folded state in which the pair of short side walls 11 are folded on the long side walls 12, 12.

  In this embodiment, the pair of short side walls 11 and 11 correspond to the “first side wall” of the present invention, and the pair of long side walls 12 and 12 correspond to the “second side wall” of the present invention. To do. Further, the opposing direction of the pair of short side walls 11, 11 is the first horizontal direction H1 according to the present invention, and the opposing direction of the pair of long side walls 12, 12 is the second horizontal direction according to the present invention. H2.

  The short side wall 11 and the long side wall 12 are regulated by the hinge mechanism between the short side wall 11 and the long side wall 12 so as not to rotate outward from the standing posture. In addition, a mechanism is also provided between the adjacent short side and long side walls 11 and 12 so as to restrict the side walls 11 and 12 from rotating from the standing posture. Specifically, as shown in FIG. 1, the connecting protrusions 14, 14 protrude toward the long side wall 12 from the upper ends of the side edges of the short side walls 11, 11. Each connecting protrusion 14 is formed with through holes 14A and 14A in two locations, upper and lower. Corresponding to this, a pair of locking projections 15, 15 are formed in a protruding manner at the upper ends of both side edges of each long side wall 12. Then, after the short side walls 11 and 11 are raised from the folded state, and the long side walls 12 and 12 are raised, the upper ends of both side edges of each long side wall 12 are short side walls adjacent to each other. 11, 11 abuts on the connecting projection pieces 14, 14 to restrict the long side walls 12, 12 from rotating outward from the standing posture. Further, each locking projection 15 of each long side wall 12 engages with each locking hole 14A of each connecting piece 14 so that the short side walls 11 and 11 rotate outward from the standing posture. regulate.

  In the container 10 of the present embodiment, a pair of flaps 20 and 20 are provided at the upper ends of the pair of short side walls 11 and 11 in the container main body 10H. Each flap 20 has a strip shape extending along the upper edge (second horizontal direction H2) of the short side wall 11, and a plurality of hinge legs 21 are formed from the edge on one end side in the width direction. It protrudes. And these hinge leg parts 21 are engaged with the upper edge part of the short side wall 11, and the flap 20 is connected with the upper edge part of the short side wall 11 so that rotation is possible. In the flap 20 of this embodiment, the width of the portion excluding the hinge leg 21 is about 1/12 to 1/10 of the size in the first horizontal direction H1 in the container body 10H.

  The flap 20 has a horizontal posture that falls to the inside of the short side wall 11 and a standing posture that stands above the extension of the short side wall 11 by a hinge mechanism (including the hinge leg portion 21) between the flap 20 and the short side wall 11. Rotation between the horizontal posture and the outward rotation from the standing posture is restricted. In addition, a mechanism is provided between the flap 20 and the long side wall 12 to restrict the rotation of the short side wall 11 downward from the horizontal posture.

  Specifically, a pair of horizontal support protrusions 22, 22 are formed on the side surfaces of the flaps 20 </ b> S, 20 </ b> S located at both ends in the longitudinal direction of the flap 20 at the end away from the rotation center of the flap 20. ing. On the other hand, a recess 16 having an open top surface is formed at the end of each long side wall 12 at the end near the short side wall 11. When the flap 20 is set to the horizontal posture, the horizontal support protrusions 22 and 22 are brought into contact with the bottom surface of the concave portion 16 of the long side wall 12 so that the flaps 20 are restricted from rotating downward from the horizontal posture. .

  Further, a step surface 12D is formed at a position near the upper end of the inner side surface of the long side wall 12, and each flap 20 is lowered below the horizontal posture by the contact between the step surface 12D and the side edge of the flap 20. It is regulated not to rotate.

  Here, when the flap 20 is in the horizontal posture, the entire flap 20 except for the horizontal support protrusions 22 and 22 is fitted between the long side walls 12 and 12 in the standing posture. 12 regulates internal falling. Further, the long side wall 12 in the standing posture is fitted between the short side walls 11 and 11 in the standing posture, and restricts the inversion of the short side walls 11 and 11. Therefore, if the flap 20 is held in a horizontal posture, the holding posture of the long side wall 12 and the short side wall 11 becomes strong, and as a result, the assembled state of the container body 10H becomes strong. Therefore, the container 10 of this embodiment is provided with a mechanism for holding the flap 20 in a horizontal posture.

  That is, as shown in FIG. 2, the flap 20 of the present embodiment is provided with a pair of flange members 23 and 23 (corresponding to the “lock member” of the present invention) so as to be linearly movable in the second horizontal direction H2. It has been. When each flange member 23 is arranged on one end side of the linear movement range, the distal end portion (corresponding to the “lock portion” of the present invention) of the flange member 23 is arranged at a lock position protruding sideways from the flap side surface 20S. Is done. In addition, when each flange member 23 is disposed on the other end side of the linear movement range, the distal end portion of the flange member 23 is disposed at the unlocked position where it is retracted to the inside of the flap side surface 20S. On the other hand, each long side wall 12 is formed with a lock hole 17 penetratingly formed in the second horizontal direction H2 at a position closer to the short side wall 11 than each recess 16. And the flap 20 is hold | maintained at a horizontal attitude | position by making the flap 20 into a horizontal attitude | position and making each front-end | tip part of the collar members 23 and 23 penetrate into the lock holes 17 and 17. FIG.

  Specifically, as shown in FIG. 4, the flap 20 includes a strip-like main plate portion 30 extending in the second horizontal direction H <b> 2, and the outer surface of the main plate portion 30 (upward when the flap 20 is in a horizontal posture). The pair of side vertical partition walls 28 and 28 extending in the width direction of the main plate portion 30 at both ends in the longitudinal direction of the main plate portion 30, and at positions near both ends in the longitudinal direction of the main plate portion 30. A pair of intermediate vertically long partition walls 29, 29 extending in the width direction of the main plate portion 30 are provided. In addition to this, on the outer surface of the main plate portion 30, the end horizontally long protruding wall 31 is provided in the second horizontal direction between the pair of intermediate vertically long partition walls 29, 29 at the end portion on the side away from the hinge leg portion 21. Extending to H2 and on the outer side of the intermediate vertically elongated partition walls 29, 29, rectangular column projecting walls 31A, 31A wider than the distal lateral projecting wall 31 extend on an extension line of the distal lateral projecting wall 31, and the rectangular projecting walls 31A, 31A End portions project sideways from the side surface of the main plate portion 30 to form the horizontal support projections 22, 22. At the end on the hinge leg 21 side of the outer surface of the main plate portion 30, the base end horizontally long protruding wall 32 extends in the second horizontal direction H <b> 2 between the pair of side portion vertically long partition walls 28 and 28.

  Each side vertically elongated partition wall 28 is inserted between the prismatic protruding wall 31 </ b> A and the base end horizontally protruding wall 32, and the side bridge plate wall 28 </ b> A having a gap between the main plate portion 30 and the side bridge. It consists of a side bridge girder wall 28 </ b> B that communicates between the side edge portion of the plate wall 28 </ b> A on the side of the middle vertically long partition wall 29 and the main plate portion 30. In the side bridge girder wall 28B, a side ridge insertion hole 28C is formed in the center between the prismatic protruding wall 31A and the base end horizontally elongated protruding wall 32. The side surface of the side bridge plate wall 28A opposite to the side bridge girder wall 28B is flush with the side surface of the main plate portion 30 to constitute the flap side surface 20S.

  Each of the intermediate vertically long partition walls 29 is interposed between the distal horizontally long protruding wall 31 and the proximal horizontally long protruded wall 32 and has a gap between the main plate portion 30 and the side vertically elongated partition wall 28 side. An intermediate bridge wall 29A in which a part of the side edge portion of the intermediate bridge wall 31A is connected to the prismatic protruding wall 31A, and the side of the intermediate bridge wall 29A on the side of the vertically long partition wall 28 between the prismatic protruding wall 31A and the proximal lateral protruding wall 32 It consists of an intermediate bridge girder wall 29B that communicates between the edge and the main plate 30. The intermediate bridge girder wall 29B is also formed with an intermediate eaves insertion hole 29C in the same manner as the side eaves insertion hole 28C.

  Of the flap 20, the rectangular accommodating portion 20 </ b> A surrounded by the distal horizontally long protruding wall 31, the proximal horizontally long protruding wall 32, and the pair of intermediate vertically long partition walls 29, 29 has a second at the end away from the hinge leg 21. A rectangular operation hole 20B is formed in the center in the horizontal direction H2. Further, a pair of elastic piece abutting protrusions 27 and 27 are formed to protrude at two positions near the middle vertically long partition walls 29 and 29 in the central portion in the width direction of the flap 20 in the rectangular accommodating portion 20A. As shown in FIG. 5, when the flap 20 is viewed from the inner surface side, the distal side long protruding wall 31 is cut out at the base end side of the portion corresponding to the rectangular operation hole 20 </ b> B.

  As shown in FIG. 4, each flange member 23 has a long plate shape having a width of approximately ¼ of the width of the main plate portion 30 and a length of approximately ３ of the flap 20. The pair of flange members 23 and 23 are overlapped on the outer surface of the main plate portion 30 with both side portions and the intermediate flange insertion holes 28C and 29C inserted in the longitudinal ends of the flap 20, respectively. Yes. In addition, an emboss 23 </ b> A is formed to project from the end of each flange member 23 on the side close to each other on the side opposite to the overlapping surface with the main plate 30. Further, as shown in FIG. 5, a sliding contact slope 23T is formed at the end of each flange member 23 on the side away from each other on the contact surface side with the main plate portion 30, and the tip of the flange member 23 is It has a tapered shape.

  An operation slider 24 for operating the eaves members 23, 23 is accommodated in the rectangular accommodating portion 20A. The operation slider 24 has a long plate structure that is narrower than the distance between the distal lateral projecting wall 31 and the proximal lateral projecting wall 32 and slightly longer in the second horizontal direction H2 than the distance between the intermediate bridge wall walls 29A and 29A. There is no. The operation slider 24 is accommodated in the rectangular accommodating portion 20 </ b> A in a state where both end portions in the longitudinal direction are sandwiched between the intermediate bridge wall 29 </ b> A and the main plate portion 30. A pair of cam grooves 26 and 26 are formed at both ends in the longitudinal direction of the operation slider 24. The pair of cam grooves 26, 26 are inclined so as to be separated from each other toward the proximal end laterally long protruding wall 32 side. Then, the embosses 23A and 23A of the flange members 23 and 23 are engaged with the cam grooves 26 and 26, respectively.

  As shown in FIG. 5, a rectangular protrusion 24 </ b> A is formed on the inner surface of the operation slider 24, which faces the outer surface of the main plate portion 30, and a portion of the operation slider 24 bulges toward the main plate portion 30. The back side of the rectangular protrusion 24A is an operation recess 24L (see FIG. 4). Further, elastic cantilever beams 25, 25 (corresponding to the “lock urging spring” of the present invention) project from both side surfaces of the rectangular protrusion 24A. Then, the respective distal end portions of the elastic cantilever beams 25 and 25 are brought into contact with the elastic piece abutting projections 27 and 27 of the main plate portion 30, and the operation slider 24 is attached to the distal lateral projecting wall 31 side in the rectangular accommodating portion 20A. It is fast. Further, a lateral rib 24D protrudes from the edge on the tip laterally long protruding wall 31 side on the inner surface of the operation slider 24. From the position of the inner surface of the operation slider 24 near both ends in the longitudinal direction, the elastic cantilever 25 and the flange member A vertical rib 24 </ b> E extending across the space 23 projects.

  An operation protrusion 24 </ b> C is formed across the rectangular protrusion 24 </ b> A and the tip horizontally long protruding wall 31 at the corner where the rectangular protrusion 24 </ b> A and the tip horizontally long protruding wall 31 intersect. Then, the operation projection 24C is received in the rectangular operation hole 20B, and a finger is placed on the operation projection 24C or a finger is placed on the operation recess 24L, so that the operation slider 24 is made elastic by the elastic cantilever 25. It can be slid to the hinge leg 21 side.

  In addition, the operation slider 24 is arranged on the side of the distal long projecting wall 31 by the urging of the elastic cantilever 25 due to the cam connection between the embosses 23A, 23A of the two flange members 23, 23 and the cam grooves 26, 26 of the operation slider 24. In the state where it is done, as shown to FIG. 6 (A), the front-end | tip part of the eaves members 23 and 23 is arrange | positioned in the said locked position which protruded from the flap side surface 20S. Then, by sliding the operation slider 24 toward the hinge leg 21 side against the elastic cantilever 25, as shown in FIG. 6B, the front ends of the flange members 23, 23 are located on the flap side surface 20S. Move to the unlocked position retracted inward.

  This completes the description of the configuration of the container 10 of the present embodiment. Next, the effect of the container 10 will be described. When loading / unloading a package into / from the container 10 according to the present embodiment, the flap 20 may be in an upright position as shown in FIG. Thereby, the upper surface opening of the container main body 10H is fully opened, and it is possible to efficiently put in and out the luggage.

  When the container 10 stores the luggage, the flap 20 is brought down inside. Then, the sliding contact slopes 23T and 23T (see FIG. 4) of the front ends of the flange members 23 and 23 in the flap 20 come into contact with the upper ends of the long side walls 12 and 12. Therefore, when the flap 20 is pushed down from the contact position, the sliding contact slopes 23T, 23T are in sliding contact with the upper ends of the long side walls 12, 12, so that the flange members 23, 23 are separated from the long side walls 12, 12. fall back. At this time, the operation slider 24 slides toward the hinge leg 21 side of the flap 20 in conjunction with the movement of the flange members 23, 23, and the elastic cantilever beams 25, 25 (see FIG. 4) bend. When the flap 20 is in a horizontal posture, the operation slider 24 slides away from the hinge leg 21 due to the elastic force of the elastic cantilever 25, and the distal end portions of the flange members 23, 23 enter the lock holes 17, 17. Rush into. Thereby, the front-end | tip part of the eaves members 23 and 23 engages unevenly with the lock holes 17 and 17, and the flap 20 is hold | maintained at a horizontal attitude | position.

  When the flap 20 is held in a horizontal posture, as shown in FIG. 1, only the central portion of the upper surface opening of the container body 10H is opened and both end portions are closed. As a result, it is possible to restrict the luggage from jumping out of the container 10 during transportation. Further, the flap 20 in the horizontal posture is fitted between a pair of long side walls 12 and 12 so that the long side walls 12 and 12 are prevented from falling down, and the long side walls 12 and 12 have short sides. It is fitted between the side walls 11 and 11 to restrict the inward fall of the short side walls 11 and 11. Thereby, the container 10 is maintained firmly in the assembled state. Further, since the adjacent short-side side walls 11 and long-side side walls 12 are maintained in an orthogonal state by the flap 20, twist deformation of the entire container 10 is also prevented. That is, the torsional strength is improved R

  If the container 10 is in a folded state, it can be returned from the transport destination without being bulky. In order to put the container 10 in the folded state, the flap 20 is placed in a standing posture. For this purpose, for example, a finger is put on the operation protrusion 24C (or the operation recess 24L) of the operation slider 24 and is slid to the rotation center side of the flap 20. As a result, the flange members 23, 23 move so as to approach each other, and the distal ends of the flange members 23, 23 are detached from the lock holes 17, 17. And what is necessary is just to pull up upwards, without changing the position of the finger | toe hung on the operation protrusion 24C of the operation slider 24. FIG. Thereby, flap 20 can be made into a standing posture.

  Next, the long side walls 12 and 12 are folded on the bottom wall 13, and the short side walls 11 and 11 are folded on the long side walls 12 and 12. Thereby, as shown in FIG. 3, the container 10 can be made into a folding state.

  Thus, according to the container 10 of the present embodiment, the flap 20 can be held in a horizontal posture by the lock mechanism, the strength of the container body 10H can be improved, and the flap 20 can be operated by operating the operation slider 24. Can be easily unlocked, and the folding operation can be performed smoothly.

[Second Embodiment]
The container 10V of the present embodiment is shown in FIGS. 7 to 9, and only the configuration of the flap 20V is different from that of the first embodiment. Hereinafter, only the configuration different from the first embodiment will be described, and the same configuration as the first embodiment will be denoted by the same reference numerals as those of the first embodiment, and redundant description will be omitted. As shown in FIG. 9, in the flap 20 </ b> V of the present embodiment, the prismatic protruding walls 31 </ b> A and 31 </ b> A are respectively provided from both ends in the second horizontal direction H <b> 2 at the edge of the main plate 30 that is away from the hinge leg 21. It extends to the position near the center, and gradually becomes thinner from the position near the center to form a tip side long protruding wall 31. Further, a central vertically long partition wall 33 extends between the distal horizontally long protruding wall 31 and the proximal horizontally long protruding wall 32 at the center of the outer surface of the main plate portion 30 in the second horizontal direction H2. Then, a pair of rod housing portions 33A, 33A surrounded by four sides by the prismatic protruding wall 31A, the distal end horizontally protruding wall 31, the side vertically elongated partition wall 28, the proximal end horizontally elongated protruding wall 32, and the central vertically elongated partition wall 33 are main plates. A pair is formed on the outer surface side of the portion 30.

  Elastic cantilever beams 25 </ b> V and 25 </ b> V are respectively provided at positions closer to the central vertically long partition wall 33 in each of the basket housing portions 33 </ b> A and 33 </ b> A. These elastic cantilever beams 25 </ b> V and 25 </ b> V extend so as to gradually separate from the central vertically long partition wall 33 from the distal horizontally long protruding wall 31 toward the proximal horizontally long protruding wall 32.

  Slide engagement claws 34 and 34 protrude from the prismatic protruding wall 31A and the base end horizontally long protruding wall 32 toward the inside of the rod housing portion 33A at positions closer to the elastic cantilever 25V in the rod housing portions 33A and 33A, respectively. Yes. Each of the slide engagement claws 34 is disposed at a position separated from the inner surface of the heel housing portion 33A.

  The pair of eaves members 23V and 23V are accommodated in the pair of eaves accommodating portions 33A and 33A, respectively. A step stopper surface 23D is formed near the tip of each flange member 23V, and the tip side is thinner than the step stopper surface 23D. Further, a finger ring portion 23B (corresponding to the “unlock operation portion” of the present invention) is formed on the proximal end side of the flange member 23V. The finger ring portion 23B has a substantially rectangular shape that is long in the second horizontal direction H2. Then, slide engagement ridges 23C and 23C extending in the second horizontal direction H2 are formed on the surfaces of the finger ring portion 23B facing the prismatic protruding wall 31A and the base end horizontally elongated protruding wall 32, respectively.

  Each scissor member 23V is accommodated in the scissor accommodating part 33A, the tip of the scissor member 23V is inserted into the side scissors insertion hole 28C of the side vertically elongated partition wall 28, and the slide engaging protrusions 23C of the scissor member 23V, 23C is locked to the slide engaging claws 34, 34 and is prevented from coming off in the rod housing portion 33A. Further, as shown in FIG. 7, the end portion of the finger ring portion 23B is pressed against the elastic cantilever beam 25V. Usually, the step stopper surface 23D is disposed at a position where it abuts against the side vertically elongated partition wall 28 by the elastic force of the elastic cantilever 25V, and the tip of the flange member 23V (the “lock portion” of the present invention). Corresponds to the side of the flap side surface 20S of the flap 20V.

  This completes the description of the configuration of the container 10V of the present embodiment. In the container 10 </ b> V, when the flap 20 </ b> V is changed from the standing posture to the horizontal posture, the container 10 </ b> V may be simply turned inward as in the container 10 of the first embodiment. Then, by the sliding contact between the sliding contact slope 23T of each flange member 23V and the long side wall 12, each flange member 23V moves backward once and then advances, and the tip of the flange member 23V engages with the lock hole 17 in an uneven manner. Thereby, as shown to FIG. 8 (A), flap 20V is hold | maintained at a horizontal attitude | position.

  When the flap 20V is changed from the horizontal posture to the standing posture, for example, the thumb and the index finger are inserted and picked into the finger ring portions 23B and 23B, and the hook members 23V and 23V are pulled toward each other. Then, as shown in FIG. 8 (B), the distal end portion of the flange member 23V moves to the unlocking position retracted inward from the flap side surface 20S of the flap 20V, and the engagement with the lock holes 17 and 17 is released. . And if it pulls up in the state which pinched the finger hook ring parts 23B and 23B, the flap 20V will be in a standing posture.

[Third Embodiment]
The container 10W of this embodiment is shown by FIGS. 10-12, and the structure of the upper end part of the long side wall 12W with which the flap 20W and the flap 20W engage is different from 1st Embodiment. Hereinafter, only the configuration different from the first embodiment will be described, and the same configuration as the first embodiment will be denoted by the same reference numerals as those of the first embodiment, and redundant description will be omitted.

  As shown in FIG. 11, in the flap 20 </ b> W of the present embodiment, the distal lateral long protruding wall 31 and the proximal lateral lateral projecting wall 32 extend over the entire second horizontal direction H <b> 2 in the main plate portion 30, The opposite end portions of the base end laterally projecting wall 32 are connected to each other by side longitudinal partition walls 28D and 28D. A slit 28E is formed through each side portion vertically long partition wall 28D in the second horizontal direction H2. Each slit 28 </ b> E is formed in a range extending from the middle portion of the side vertically elongated partition wall 28 </ b> D near the proximal horizontally long protruding wall 32 to the distal horizontally long protruding wall 31. Since the slit 28E is formed, a portion corresponding to the slit 28E in the side vertically elongated partition wall 28D has a long plate structure separated from the main plate portion 30.

  Horizontal support protrusions 28H protrude from the flap side surfaces 20S and 20S of the flap 20W. The horizontal support protrusion 28H is disposed in the middle of the flap side surface 20S between the front end horizontally protruding wall 31 and the base end horizontally extended protrusion wall 32, and has a rectangular plate portion 28G extending sideways from the main plate portion 30 and a side vertically elongated section. The wall 28D includes a prismatic part 28F extending laterally along the edge of the rectangular plate part 28G from the side part of the base end horizontally long protruding wall 32 with respect to the slit 28E.

  A lock slider 24W is slidably accommodated in a rectangular accommodating portion 20C that is surrounded on all sides by the distal horizontally long protruding wall 31, the proximal horizontally long protruding wall 32, and the side vertically elongated partition walls 28D and 28D. The lock slider 24W has the same length in the second horizontal direction H2 as the rectangular housing portion 20C and has a width smaller than that of the rectangular housing portion 20C, on both sides of the slide long plate 35 (corresponding to the “unlock operation portion” of the present invention). The lock pieces 36 and 36 (corresponding to the “lock portion” of the present invention) are projected laterally from the surface. The lock pieces 36 and 36 are disposed at the end of the side surface of the long slide plate 35 on the side of the distal long projecting wall 31, and the lock slider 24 </ b> W is accommodated in a rectangular shape with the lock pieces 36 and 36 inserted into the slits 28 </ b> E and 28 </ b> E. The part 20C moves linearly in the width direction. In addition, each lock piece 36 has a slightly smaller lateral protrusion from the flap side surface 20S than the rectangular plate portion 28G, and the width of the lock piece 36 is slightly smaller than the width of the rectangular plate portion 28G. . Then, when the lock slider 24W moves to the base end side long protruding wall 32 side in the linear motion direction, the lock piece 36 comes into contact with the prism portion 28F, the lock slider 24W is disposed at the unlock position, and the lock piece 36 as a whole is rectangular. It overlaps on the plate part 28G. On the other hand, when the lock slider 24W moves to the side of the tip side long projecting wall 31 in the linear motion direction, the slide long plate 35 contacts the tip side long projecting wall 31 and the lock slider 24W is positioned at the lock position. Overhangs toward the side of the distal laterally long protruding wall 31 with respect to the rectangular plate portion 28G.

  A pair of elastic cantilever beams 25 </ b> W and 25 </ b> W project from the surface facing the base end laterally long protruding wall 32 at the center in the longitudinal direction of the long slide plate 35. The pair of elastic cantilever beams 25 </ b> W and 25 </ b> W has a structure in which the legs are opened so as to be separated from each other toward the proximal end long projecting wall 32. The distal ends of the elastic cantilever beams 25W and 25W are in contact with the base end laterally long projecting wall 32, and the lock slider 24W is urged toward the distal end laterally projecting wall 31 side.

  As shown in FIG. 10, the long side wall 12W is formed with a recess 19 that can receive the horizontal support protrusion 28H. The concave portion 19 is formed by cutting out the upper end portion of the long side wall 12W by substantially the same width as the horizontal support protrusion 28H in the first horizontal direction H1. In addition, a guide inclined surface 19 </ b> S is formed at the opening edge of the recess 19 on the side away from the short side wall 11. Further, a lock groove 19 </ b> A is formed on the inner surface of the long side wall 12 </ b> W on the side farther from the short side wall 11 than the recess 19, and the lock groove 19 </ b> A is open to the inner surface of the recess 19.

  This completes the description of the configuration of the container 10W of the present embodiment. In the container 10W, when the flap 20W is changed from the standing posture to the horizontal posture, the flap 20W may be simply turned inward as in the container 10 of the first embodiment. Then, the lock piece 36 protruding from the horizontal support protrusion 28H to the rotation tip side of each lock piece 36 comes into sliding contact with the guide inclined surface 19S in the concave portion 19, and the lock slider 24W biases the elastic cantilever 25W. Move to the unlock position side against

  When the flap 20W is in the horizontal posture, the horizontal support protrusion 28H comes into contact with the bottom surface of the recess 19 and the lock piece 36 faces the lock groove 19A in the first horizontal direction H1. Then, the lock slider 24W is moved to the lock position by the elastic force of the elastic cantilever 25W, and the lock piece 36 is engaged with the lock groove 19A as shown in FIG. As a result, the flap 20W is held in a horizontal posture.

  When changing the flap 20W from the horizontal posture to the standing posture, for example, a finger is put on the operation recess 24L to move the lock slider 24W to the unlock position. Then, as shown in FIG. 12B, the lock pieces 36 and 36 are detached from the lock grooves 19A and 19A. Therefore, if the flap 20W is raised in this state, the flap 20W is in the standing posture.

[Fourth Embodiment]
A container 10X of the present embodiment is shown in FIGS. 13 to 17, and the configuration of the upper end portion of the long side wall 12X where the flap 20X and the flap 20X engage is different from that of the first embodiment. Hereinafter, only the configuration different from the first embodiment will be described, and the same configuration as the first embodiment will be denoted by the same reference numerals as those of the first embodiment, and redundant description will be omitted.

  The operation slider 24X of the flap 20X of the present embodiment shown in FIG. 15A (corresponding to the “unlock operation section” of the present invention) is the operation slider of the first embodiment shown in FIGS. The only difference is that the inclination direction of the pair of cam grooves 26X, 26X is opposite to 24X. That is, the pair of cam grooves 26, 26 of the first embodiment are inclined so as to be separated from each other toward the hinge leg 21, whereas the pair of cam grooves 26 X, 26 X of the present embodiment are Inclined so as to approach each other toward the hinge leg 21.

  The flange member 23X of the flap 20X of the present embodiment shown in FIG. 15B (corresponding to the “locking action portion” of the present invention) is different from the flange member 23 of the first embodiment shown in FIG. The only difference is that the sliding contact slope 23T is abolished.

  From the flap side surfaces 20S and 20S of the flap 20X of the present embodiment shown in FIG. 15A, horizontal posture maintaining projections 37 and 37 (corresponding to the “engaged portion” of the present invention) respectively protrude. . The horizontal posture maintaining projection 37 includes the horizontal support protrusion 22 described in the first embodiment and a rectangular plate portion 37A extending from the main plate portion 30. The horizontal posture maintaining projection 37 extends horizontally from the side edge portion of the rectangular plate portion 37A. The protrusion 22 is integrated.

  As shown in FIG. 13, a longitudinal groove 40 that can receive the horizontal posture maintaining protrusion 37 is formed on the inner surface of the long side wall 12 </ b> X, and the upper end of the longitudinal groove 40 faces the upper surface of the long side wall 12 </ b> X. The lower end of the longitudinal groove 40 is closed by a step surface 40D formed at a position near the upper end of the long side wall 12X. Then, when the flap 20X is set to the horizontal posture, as shown in FIG. 17A, the horizontal posture maintaining projection 37 is received by the vertical groove 40 from above and contacts the step surface 40D.

  As shown in FIG. 13, a cantilever 41 (corresponding to the “side wall side lock urging spring” of the present invention) is provided at an intermediate position in the vertical direction of the vertical groove 40. The cantilever 41 is formed by forming a gate-shaped slit in the long side wall 12X and cutting out a part of the long side wall 12X into a cantilever shape. Moreover, as shown in FIG. 17A, the cantilever 41 extends from the end of the longitudinal groove 40 in the width direction away from the short side wall 11 toward the short side wall 11 and has its tip end portion. A locking claw 42 (corresponding to the “side wall side lock portion” of the present invention) is formed so as to protrude from the inside toward the inside. The locking claw 42 is disposed in the middle of the vertical groove 40 in the vertical direction and interferes with the horizontal posture maintaining protrusion 37 of the flap 20X. The locking claw 42 is formed with a locking surface 42A that is parallel to and opposed to the step surface 40D, and an inclined surface 42S that is inclined so as to gradually descend inward.

  This completes the description of the configuration of the container 10X of the present embodiment. In the container 10X, when the flap 20X is changed from the standing posture to the horizontal posture, the flap 20X may be simply turned inward as in the container 10 of the first embodiment. Then, the rectangular plate portion 37 </ b> A of the horizontal posture maintaining projection 37 slides on the inclined surface 42 </ b> S of the locking claw 42 to bend the cantilever 41 outward. As a result, the locking claw 42 retracts from the vertical groove 40, and the horizontal posture maintaining projection 37 passes through the locking claw 42 and contacts the step surface 40 </ b> D at the lower end of the vertical groove 40. Then, the cantilever 41 is restored and the locking claw 42 is locked to the horizontal posture maintaining projection 37 from above. Thereby, as shown in FIGS. 13 and 17A, the flap 20X is held in a horizontal posture. At this time, the flange member 23X is in a state of being abutted against the locking claw 42 in the second horizontal direction H2.

When the flap 20X is changed from the horizontal posture to the standing posture, a finger is put on the operation protrusion 24C (or the operation recess 24L) of the operation slider 24X and is slid to the rotation center side of the flap 20. As a result, as shown in FIGS. 16A to 16B, the eaves members 23X and 23X move away from each other, and each eaves member 23X holds the locking claws 42 in the second horizontal direction H2. Press. Accordingly, as shown in FIGS. 14 and 17B, the locking claw 42 is retracted from the vertical groove 40, and the horizontal posture maintaining projection 37 and the locking claw 42 do not interfere with each other. It can be turned to a standing posture.
[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) In the first to fourth embodiments, the container body 10H is foldable. However, the present invention may be applied by providing a flap in a container that cannot be folded.

  (2) In the first embodiment, the flap 20 is attached to the short side wall of the short side wall 11 and the long side side wall 12, but the flap may be attached to the long side wall.

  (3) In the first embodiment, the flap 20 is attached to the side wall (short side wall 11) arranged on the upper side in the folded state, but the side wall (long side side wall 12) arranged on the lower side is attached. ) May be attached with a flap. According to such a configuration, when changing from the assembled state to the folded state, the flap can be turned, and the side wall can be folded inward without releasing the hand, so that the folding operation is facilitated.

10, 10V, 10W, 10X Container 10H Container body 11 Short side wall 12, 12W, 12X Long side wall 13 Bottom wall 17 Lock hole 19 Recess 19A Lock groove 20, 20V, 20W, 20X Flap 23B Finger hook ring (Unlock) Operation part)
24, 24X Operation slider (unlock operation section)
24W Lock Slider 25, 25V, 25W Elastic cantilever (lock bias spring)
28G Rectangular plate part 28H Horizontal support protrusion 35 Slide long plate 36 Lock piece (lock action part)
37 Horizontal posture maintaining protrusion (engaged part)
40 Vertical groove 40D Step surface 41 Cantilever 42 Locking claw H1 First horizontal direction H2 Second horizontal direction

Claims (5)

When a pair of flaps are rotatably connected to upper edges of a pair of first side walls opposed in the first horizontal direction in a container body having an open top surface, both of the flaps are in a horizontal posture. The container body is fitted between a pair of second side walls facing each other in a second horizontal direction orthogonal to the first horizontal direction, and both ends of the upper surface opening of the container body are closed and a central part In a container with a flap, where only the upper surface opening is opened when both of the flaps are in an upright position when only the flap is in an open state,
A pair of locking portions disposed on both sides of the flap, and capable of reciprocating between a locking position protruding from a side surface of the flap and an unlocking position retracted from the locking position to the side surface of the flap ; A lock urging spring for urging a pair of lock portions to the lock position, and a lock release for moving the pair of lock portions to the unlock position against the urging force of the lock urging spring While providing an operation portion on each of the flaps,
The second side wall of the pre-Symbol pair, together with the said engaging the locking portion that is disposed on the locked position of the flap in the horizontal position, to prohibit the rotation of the flap, the locking portion is the When moved to the unlocking position, a lock engaging portion that releases the engagement with the lock portion and allows the flap to rotate is provided ,
The first side wall and the second side wall are rotatably connected to an outer edge portion of a bottom wall of the container body, and the container body has the first side wall and the second side wall standing up from the bottom wall. It can be changed into an assembled state connected to each other and a folded state in which the first side wall and the second side wall overlap the bottom wall, and in the assembled state, the pair of second side walls are: Fitted between the pair of first side walls;
The pair of second side walls protrude from both side edge portions of each first side wall to the pair of second side wall sides and overlap the outer surfaces of the pair of second side walls in the assembled state. Provided with a pair of connecting protrusions that prohibit rotation;
A sliding contact slope that slides when the lock portion is pressed against the wall portion of the second side wall above the lock engagement portion from above, and guides the lock portion from the lock position to the unlock position; Container with flap, characterized by having.   When a pair of flaps are rotatably connected to upper edges of a pair of first side walls opposed in the first horizontal direction in a container body having an open top surface, both of the flaps are in a horizontal posture. The container body is fitted between a pair of second side walls facing each other in a second horizontal direction orthogonal to the first horizontal direction, and both ends of the upper surface opening of the container body are closed and a central part In a container with a flap, where only the upper surface opening is opened when both of the flaps are in an upright position when only the flap is in an open state,
  A pair of locking portions disposed on both sides of the flap, and capable of reciprocating between a locking position protruding from a side surface of the flap and an unlocking position retracted from the locking position to the side surface of the flap; A lock urging spring for urging a pair of lock portions to the lock position, and a lock release for moving the pair of lock portions to the unlock position against the urging force of the lock urging spring While providing an operation portion on each of the flaps,
  The pair of second side walls engages with the lock portion disposed at the lock position of the flap in the horizontal posture to inhibit the flap from rotating, and the lock portion is locked to the lock. When moved to the release position, a lock engagement portion is provided that releases the engagement with the lock portion and allows the flap to rotate,
  A pair of horizontal support protrusions protruding laterally from a position shifted from the lock portion in the rotational radius direction of the flap of the side surface of the flap are provided, and each horizontal support is provided at an upper end portion of each second side wall. A container with a flap, wherein a recess having an open top surface for receiving a protrusion is formed. A pair of locking members capable of linearly moving in the second horizontal direction are provided on the flap, and the ends of the locking members on the sides separated from each other are used as the pair of locking portions, and the lock biasing spring Urging the pair of locking members away from each other at
An operation slider that can be slid in the rotation radius direction of the flap is provided as the unlocking operation portion, and the pair of locks are interlocked with the slide operation of the operation slider against the urging force of the lock urging spring. The operation slider and the lock member are cam-coupled so that the members approach each other,
A lock hole opened in the second horizontal direction is provided in each second side wall as the lock engaging portion;
3. The concave and convex engagement with the lock hole when the lock portion is disposed at the lock position, and the lock portion moves to the unlock position to be detached from the lock hole. Container with flap as described in. When a pair of flaps are rotatably connected to upper edges of a pair of first side walls opposed in the first horizontal direction in a container body having an open top surface, both of the flaps are in a horizontal posture. The container body is fitted between a pair of second side walls facing each other in a second horizontal direction orthogonal to the first horizontal direction, and both ends of the upper surface opening of the container body are closed and a central part In a container with a flap, where only the upper surface opening is opened when both of the flaps are in an upright position when only the flap is in an open state,
Forming a pair of engaged parts on both sides of the flap;
The pair of second side walls move between a locked position and an unlocked position, and when arranged at the locked position, engage with the engaged portion of the flap in the horizontal posture to engage the flap. The side wall-side lock part that disengages the engaged part when it is disposed at the unlocking position and allows the flap to rotate, and locks the side wall-side lock part. A side wall side lock urging spring for urging the position,
Each of the flaps is disposed on both sides of the flaps, and a pair of locking action portions capable of reciprocating between a locking permission position and an unlocking action position, and the locking action portions at the lock permission position. A lock urging spring for urging, and a lock release operation part for moving the pair of lock action parts to the unlock action position against the urging force of the lock urging spring;
The pair of lock action portions are abutted against the side wall lock portion of the lock position when disposed at the lock permissible position, and press the side wall lock portion when moved to the lock release action position. Then, the container with a flap is moved to the unlocking position . The first side wall and the second side wall are rotatably connected to an outer edge portion of a bottom wall of the container body, and the container body has the first side wall and the second side wall standing up from the bottom wall. It can be changed to an assembled state connected to each other and a folded state in which the first side wall and the second side wall overlap the bottom wall,
The container with a flap according to claim 4, wherein the pair of second side walls are configured to be fitted between the pair of first side walls in the assembled state of the container body. .

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