JP2018012536A - Foldable container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress breakage of a thin part as weight of the other side wall excessively concentrates and acts on the a thin part of a side wall, in a folded state of a foldable container.SOLUTION: On a bottom wall 11 of a foldable container 10, a pair of long side walls 21 and a pair of short side walls 31 are raised. The short side wall 31 has a second thin part 32 extending in the width direction, a lower short side wall 31D positioned on the side of the bottom wall 11 with respect to the second thin part 32, and an upper short side wall 31U which is rotatable inwardly by the second thin part 32. On the lower short side wall 31D, a protruding part 33 which protrudes to extend above the second thin part 32 from an upper end part of the lower short side wall 31D is provided. On the upper short side wall 31U, a housing recessed part 35 which is dented from a base end part of the upper short side wall 31U to a tip end side of the upper short side wall 31U is provided. In such a state that the upper short side wall 31U is raised, the protruding part 33 is positioned inside the housing recessed part 35.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a folding container made of a synthetic resin hollow plate.

  Patent Document 1 describes a folding container made of a synthetic resin hollow plate. The folding container of Patent Document 1 includes a rectangular plate-like bottom wall and a pair of opposed long side walls and short side walls that are erected on the periphery of the bottom wall. Moreover, in the folding container of patent document 1, each side wall has a thin part which functions as a hinge by being formed thinner than other places. And in each side wall, the part above the thin part can turn inward with respect to the part below the thin part.

JP 2015-34027 A

  The folding container of Patent Document 1 is folded by turning each short side wall inward and turning each long side wall inward so that the pair of long side walls overlap each other. Thus, in a folded state, when a pair of long side walls overlap on the short side walls, the weight of the long side walls acts on the short side walls. And the weight acting from the upper side on the short side wall in the folded state tends to concentrate on the thin part functioning as a hinge, and if such weight acts excessively on the thin part, the cause of the damage of the thin part It becomes.

  In order to solve the above-mentioned problems, the present invention comprises a hollow plate material made of a synthetic resin having a hollow structure therein, a square plate-like bottom wall, and a pair of opposed first walls erected on the periphery of the bottom wall. A quadrangular box-like folding container comprising a side wall and a pair of opposing second side walls disposed between a pair of the first side walls and standing on the periphery of the bottom wall, wherein the first side wall Includes a first thin wall portion extending in the width direction of the first side wall, a first lower wall wall positioned on the bottom wall side of the first thin wall wall portion, and an upper side of the first lower wall wall. A first upper side wall that is pivotable inward with respect to the first lower side wall by one thin part, and the second side wall has a second thin part that extends in a width direction of the second side wall, and A second lower wall located closer to the bottom wall than the second thin wall; and the second thin wall located above the second lower wall. And a second upper side wall rotatable inward with respect to the second lower side wall, wherein the second lower side wall is located above the second thin wall portion from the upper end portion of the second lower side wall. The second upper side wall is provided with a projecting portion that extends so as to extend from the base end, which is the end of the second upper side wall on the second lower side wall side, to the distal end side of the second upper side wall. The projecting portion is located inside the housing recess in an upright state where the second upper side wall is erected in the same direction as the erection direction of the second lower side wall.

  According to said structure, when rotating the 1st upper side wall of a 1st side wall inward, the inner surface (lower surface in the folded state) of a 1st upper side wall contact | abuts the front-end | tip of the protrusion part of a 2nd lower side wall. it can. Thus, if the tip of the projecting portion comes into contact with the inner surface of the first upper side wall, at least a part of the weight of the first upper side wall is received by the projecting portion of the second side wall. Therefore, it can suppress that the weight of a 1st upper side wall acts on the 2nd thin part of a 2nd side wall too much, As a result, it can suppress that the 2nd thin part is damaged.

  In the above invention, the end portion in the width direction of the first lower side wall may be a lower surface covering from the outer surface at the end portion in the width direction of the first lower side wall to the outer surface at the end portion in the width direction of the second lower side wall. A side reinforcing portion is attached, and the width direction end of the first upper side wall is attached to the width direction end of the first upper side wall from the outer surface of the first upper side wall in the width direction. An upper reinforcing portion is attached to cover the outer surface at the end of the upper reinforcing portion, and the lower reinforcing portion is connected to the upper reinforcing portion in a state where the first upper side wall is rotated inward together with the upper reinforcing portion. A support surface that abuts and supports the upper reinforcing portion is provided, and the support surface may be a surface parallel to the bottom wall.

  According to said structure, a part of weight of a 1st upper side wall and an upper side reinforcement part is received also by the support surface of the lower side reinforcement part attached to the 1st lower side wall. Since the support surface is a surface parallel to the bottom wall, for example, when the folding container is placed on a horizontal surface, the support surface is also horizontal. If the weights of the upper reinforcing portion and the first upper side wall can be received in such a horizontal plane, these weights act on the first thin portion of the first side wall portion, and the first thin portion is damaged. Can be suppressed.

  According to this invention, it can suppress that a 2nd thin part breaks by suppressing that the weight of a 1st side wall concentrates and acts on the 2nd thin part of a 2nd side wall too much.

The perspective view of a folding container and a cover member. The perspective view of the folding container of the state which folded the short side wall. The perspective view of the folding container of the folded state which covered the cover part. 4A is a sectional view taken along line 4A-4A in FIG. 1, FIG. 4B is a sectional view taken along line 4B-4B in FIG. 1, and FIG. 4C is a sectional view taken along line 4C-4C in FIG. The front view of the folding container from the short side wall side in a folding state. The front view of the lower side reinforcement part and upper side reinforcement part from the short side wall side in a folding state. The perspective view of the cover member of the state which reversed up and down. Sectional drawing of the folding container in the state which attached the cover member. 9-9 sectional drawing in FIG.

Hereinafter, the folding container 10 of the present invention and the lid member 50 that can be used with the folding container 10 will be described with reference to the drawings. First, the folding container 10 will be described.
As shown in FIG. 1, the folding container 10 has a bottomed square box shape as a whole. The bottom wall 11 of the folding container 10 is made of a synthetic resin hollow plate material having a hollow structure inside, and has a rectangular plate shape. In addition, as a hollow board | plate material (resin structure), the thing of Unexamined-Japanese-Patent No. 2013-16335 is mentioned, for example.

  As shown in FIG. 1, a rectangular plate-like long side wall 21 is erected on the peripheral edge of the bottom wall 11 along the long side of the bottom wall 11. The long side wall 21 as the first side wall is erected at a right angle to the bottom wall 11. The long side wall 21 extends from one end in the longitudinal direction of the bottom wall 11 to the other end. Further, the long side wall 21 is erected along each of the two long sides of the bottom wall 11, and the pair of long side walls 21 face each other. The pair of long side walls 21 is made of the same hollow plate material as the bottom wall 11. In particular, in this embodiment, a bottom wall 11 and a pair of long side walls 21 standing from the bottom wall 11 are formed by bending a predetermined hollow portion of a rectangular hollow plate while heating. Is done.

  As shown in FIG. 1, the long side wall 21 is provided with a first thin portion 22 that extends in the width direction (the direction along the long side of the bottom wall 11). As shown in FIG. 4C, the first thin portion 22 is cut from the outer surface side of the long side wall 21 (left side in FIG. 4C) so as not to penetrate the long side wall 21 in the thickness direction (half cut). By forming, the thickness is made thinner than other portions where the cut is not formed. In FIG. 4, illustration of internal structures in the bottom wall 11, the long side wall 21, and the short side wall 31 is omitted.

  As shown in FIG. 1, the long side wall 21 is divided into a lower long side wall 21D located on the bottom wall 11 side and an upper long side wall 21U located above the lower long side wall 21D with the first thin portion 22 as a boundary. It is partitioned. The long side wall 21 has an internal hollow structure cut at the first thin portion 22, and the bending strength at the first thin portion 22 is lower than other portions. Therefore, the first thin wall portion 22 functions as a hinge, and the upper long side wall 21U in the long side wall 21 is rotatable inward with respect to the lower long side wall 21D via the first thin wall portion 22.

  As shown in FIG. 1, a rectangular plate-like short side wall 31 is erected on the peripheral edge of the bottom wall 11 along the short side of the bottom wall 11. The short side wall 31 as the second side wall is erected at a right angle to the bottom wall 11. The short side wall 31 is disposed between a pair of opposed long side walls 21 and extends from the inner surface of one long side wall 21 to the inner surface of the other long side wall 21. The length of the short side wall 31 in the standing direction (vertical direction) is the same as that of the long side wall 21. The short side wall 31 is erected along each of the two short sides of the bottom wall 11, and the pair of short side walls 31 face each other. The pair of short side walls 31 is composed of a hollow plate material of the same type as the bottom wall 11. In particular, in this embodiment, the short side wall 31 is formed by fixing a hollow plate material separate from the bottom wall 11 to the bottom wall 11 by resin welding (plastic welding).

  As shown in FIG. 1, the short side wall 31 is provided with a second thin portion 32 extending in the width direction (the direction along the short side of the bottom wall 11). The second thin portion 32 is provided at a total of three locations, that is, both ends in the width direction of the short side wall 31 and the central portion in the width direction, and these second thin portions 32 are located on the same straight line. As shown in FIG. 4A, the second thin portion 32 is formed by forming a cut (half cut) from the outer surface side of the short side wall 31 so as not to penetrate the short side wall 31 in the thickness direction. It is made thinner than other parts that are not formed. The formation position of the second thin portion 32 in the vertical direction is lower than the formation position of the first thin portion 22 of the long side wall 21 by a predetermined distance X1. In this embodiment, the predetermined distance X1 is the same as the thickness of the short side wall 31.

  As shown in FIGS. 1 and 2, the short side wall 31 has a lower short side wall 31D positioned on the bottom wall 11 side and an upper side of the lower short side wall 31D with the formation position of the second thin portion 32 in the vertical direction as a boundary. And the upper short side wall 31U. In the short side wall 31, the upper end portion of the lower short side wall 31 </ b> D and the lower end portion of the upper short side wall 31 </ b> U are not connected and separated at portions other than the second thin portion 32. The short side wall 31 has an internal hollow structure cut at the second thin portion 32, and the strength at the second thin portion 32 is lower than other portions. Therefore, the second thin wall portion 32 functions as a hinge, and the upper short side wall 31U of the short side wall 31 is rotatable inward with respect to the lower short side wall 31D via the second thin wall portion 32.

  As shown in FIGS. 2 and 5, the lower short side wall 31D of the short side wall 31 is provided with a protruding portion 33 that protrudes upward from the upper end portion of the lower short side wall 31D. The protruding portion 33 is formed between the second thin portion 32 on one side in the width direction and the second thin portion 32 at the center in the width direction, the second thin portion 32 on the other side in the width direction, and the second thin portion 32 in the center in the width direction. In total, two places are provided. Each protrusion 33 has a quadrangular shape in plan view. As shown in FIG. 4B, the protrusion length from the upper end of the lower short side wall 31D of the protrusion 33 is a predetermined distance X1. That is, the height position of the front end surface of the projecting portion 33 is the same height position as the first thin portion 22 of the long side wall 21.

  As shown in FIG. 2, the upper short side wall 31U in the short side wall 31 is recessed from the base end, which is the end of the upper short side wall 31U on the lower short side wall 31D side, to the front end side of the upper short side wall 31U. A recess 35 is provided. The accommodation recess 35 is provided at two locations corresponding to the protrusions 33 in the width direction of the upper short side wall 31U. In addition, the housing recess 35 has a rectangular shape that is the same shape and size as the protrusion 33 in plan view. A hook-and-loop fastener 36 is attached to the edge in the width direction of the outer surface of the upper short side wall 31U.

  In addition, as shown in FIG.4 (b), such a protrusion part 33 and the accommodation recessed part 35 are formed by cut | disconnecting the short side wall 31 so that it may penetrate in the thickness direction along predetermined shape. Specifically, in this embodiment, by cutting the short side wall 31 in a downward U-shape so as to connect the ends of the adjacent second thin portions 32 in the short side wall 31, the short side wall 31 has a plan view. A quadrangular protrusion 33 and an accommodating recess 35 of the same shape and size are formed.

  As shown in FIGS. 1 and 2, a lower reinforcing portion 41 extending in the vertical direction is attached to an edge portion of the lower long side wall 21 </ b> D in the long side wall 21 in the width direction. The lower reinforcing portion 41 extends so as to extend over the entire lower long side wall 21D. The lower reinforcing portion 41 has an L-shaped cross section orthogonal to the extending direction, and has two wall portions extending at right angles to each other. And while one wall part of the lower side reinforcement part 41 has covered the outer surface in the edge part of the width direction of lower long side wall 21D, the other wall part of the lower side reinforcement part 41 is the width | variety of lower short side wall 31D. It covers the outer surface at the edge of the direction. Thus, the lower side reinforcement part 41 is reinforcing the corner | angular part which is a boundary part of lower long side wall 21D and lower short side wall 31D. Further, four lower reinforcing portions 41 are provided corresponding to four boundary portions between the lower long side wall 21D and the lower short side wall 31D. Each lower reinforcing portion 41 is fixed to the lower long side wall 21D by a rivet (not shown) and is also fixed to the lower short side wall 31D by a rivet (not shown).

  As shown in FIG. 6, a square notch 42 is provided at the upper end of the wall that covers the outer surface of the lower short side wall 31 </ b> D in the lower reinforcing portion 41. The cutout portion 42 is cut out within a predetermined distance X2 from the widthwise center edge of the short side wall 31 in the lower reinforcement portion 41 within a predetermined distance X2, and from the upper end of the lower reinforcement portion 41 to the lower reinforcement portion 41. It is notched to the side within a range of a predetermined distance X2. In this embodiment, the predetermined distance X2 is a distance from the edge in the width direction center side of the short side wall 31 in the lower reinforcing portion 41 to the inner surface of the lower long side wall 21D. The square notch 42 has one side of the square parallel to the bottom wall 11. As a result, a part of the inner end surface of the notch 42 is configured as a support surface 43 parallel to the bottom wall 11.

  As shown in FIGS. 1 and 2, an upper reinforcing portion 45 extending in the vertical direction is attached to an edge portion of the upper long side wall 21 </ b> U in the width direction in the long side wall 21. The upper reinforcing portion 45 extends so as to cover the entire upper long side wall 21U in the vertical direction. The upper reinforcing portion 45 has an L-shaped cross section orthogonal to the extending direction, and has two wall portions extending at right angles to each other. One wall portion of the upper reinforcing portion 45 covers the outer surface at the edge portion in the width direction of the upper long side wall 21U, and the other wall portion of the upper reinforcing portion 45 extends in the width direction of the upper short side wall 31U. It covers the outer surface at the edge. Thus, the upper side reinforcement part 45 is reinforcing the corner | angular part which is a boundary part of the upper long side wall 21U and the upper short side wall 31U. Further, four upper reinforcing portions 45 are provided corresponding to four boundary portions between the upper long side wall 21U and the upper short side wall 31U. Each upper reinforcing portion 45 is fixed to the upper long side wall 21U by a rivet (not shown). Each upper reinforcing portion 45 is detachably attached to the outer surface of the opposed upper short side wall 31U by a hook-and-loop fastener 36.

A folding mode of the folding container 10 configured as described above will be described.
As shown in FIG. 1, in the standing state in which the upper long side wall 21U of the long side wall 21 in the folding container 10 is erected in the same direction as the lower long side wall 21D, the long side wall 21 is a single plate. It has become. Similarly, in the upright state in which the upper short side wall 31U of the short side wall 31 is erected in the same direction as the erected direction of the lower short side wall 31D, the short side wall 31 has a single plate shape.

  Here, as shown in FIG. 2, the protrusion 33 protruding from the upper end of the lower short side wall 31D and the accommodating recess 35 recessed from the base end of the upper short side wall 31U to the distal end side are the same in plan view. It is the same size. Therefore, when the upper short side wall 31U is in the standing state as shown in FIG. Further, the projecting portion 33 does not get in the way when the upper and short side walls 31U rotated inward are rotated to the standing state.

  When the upper short side wall 31U is in an upright state, the outer surface of the upper short side wall 31U is fixed to the upper reinforcing portion 45 by the hook-and-loop fastener 36. For this reason, the upper short side wall 31U is prevented from rotating inward by itself due to its own weight. Furthermore, since the short side wall 31 is located between the pair of long side walls 21, if the upper short side wall 31U in the short side wall 31 is in the standing state, the upper short side wall 31U in the standing state causes the long side wall 21 to The upper long side wall 21U is restricted from rotating inward.

  When folding the folding container 10, first, as shown in FIG. 2, the upper short side wall 31 </ b> U in the short side wall 31 is rotated inward via the second thin portion 32. Here, the height position of the first thin portion 22 in the long side wall 21 is higher than the second thin portion 32 in the short side wall 31 by the thickness (predetermined distance X1) of the short side wall 31. Therefore, when the upper short side wall 31U is rotated 90 ° inward with respect to the lower short side wall 31D, the entire upper long side wall 21U is positioned above the upper short side wall 31U. In such a positional relationship, the upper long side wall 21U of the long side wall 21 can be turned inward without being restricted by the upper short side wall 31U.

  When the upper short side wall 31U is turned 90 ° inward after the upper short side wall 31U of the folding container 10 is turned 90 ° inward, the upper long side wall 21U is superimposed on the upper short side wall 31U. It becomes like this. Here, the protrusion length of the protrusion 33 on the short side wall 31 is the same predetermined distance X1 as the thickness of the upper short side wall 31U. That is, as shown in FIG. 5, the tip of the projecting portion 33 is at the same height as the upper surface (the outer surface in the standing state) of the upper short side wall 31U rotated 90 degrees inward. In such a positional relationship, the lower surface of the upper long side wall 21U rotated inward by 90 ° is in surface contact with the upper surface of the upper short side wall 31U and is also in contact with the front end surface of the protruding portion 33 of the short side wall 31. Contact. Accordingly, at least a part of the weight of the upper long side wall 21U is received by the protruding portion 33 and supported by the lower short side wall 31D. Further, the upper long side wall 21U is prevented from further inwardly turning due to the contact relationship with the protruding portion 33. In addition, in FIG. 5, the front view of the folding container 10 of the state which abbreviate | omitted the lower side reinforcement part 41 and the upper side reinforcement part 45 is shown in figure.

  As shown in FIG. 6, when the upper long side wall 21U is turned inward by 90 °, the upper reinforcing portion 45 is also turned inward by 90 ° together with the upper long side wall 21U. Then, the lower corner portion of the upper reinforcing portion 45 is fitted into the notch portion 42 in the lower reinforcing portion 41, and the upper reinforcing portion 45 is supported by the support surface 43. Accordingly, part of the weight of the upper reinforcing portion 45 and the upper long side wall 21 </ b> U is received by the lower reinforcing portion 41.

Next, the lid member 50 will be described.
As shown in FIG. 1, the top plate 51 of the lid member 50 is a hollow plate material made of synthetic resin, and has a rectangular plate shape. The dimension in the longitudinal direction of the top plate 51 is substantially the same as the dimension in the longitudinal direction of the bottom wall 11 in the folding container 10. The dimension of the top plate 51 in the short direction is slightly larger than that of the bottom wall 11.

  As shown in FIGS. 1 and 7, a rectangular plate-like side plate 52 is erected on the periphery of the top plate 51 along the long side of the top plate 51. The side plate 52 is erected at a right angle to the top plate 51. The side plate 52 extends from one end in the longitudinal direction of the top plate 51 to the other end. The length of the side plate 52 in the standing direction (vertical direction) is substantially the same as the vertical dimension of the folding container 10 in the folded state. Specifically, the length of the side plate 52 in the standing direction includes the thickness of the bottom wall 11 in the folding container 10, the length in the vertical direction of the lower long side wall 21 </ b> D, the thickness of the upper long side wall 21 </ b> U, and the upper reinforcing portion 45. The length is the sum of the wall thicknesses. The side plate 52 is erected along each of the two long sides of the top plate 51, and the pair of side plates 52 face each other.

  As shown in FIG. 7, a pair of stopper portions 53 that extend in the short direction of the top plate 51 protrude from the inner surface of the top plate 51 on the inner surface (the upper surface in FIG. 7) of the top plate 51. . The length in the extending direction of each stopper portion 53 is smaller than the length from the inner surface of one short side wall 31 to the inner surface of the other short side wall 31 in the folding container 10. The stopper portion 53 does not reach each side plate 52, and a gap is provided between the stopper portion 53 and each side plate 52. The pair of stopper portions 53 are arranged such that a distance from an outer edge portion of one stopper portion 53 to an outer edge portion of the other stopper portion 53 is a predetermined distance X3 in the longitudinal direction of the top plate 51. Yes. The predetermined distance X3 is slightly smaller than the distance from the inner edge in the width direction of one upper reinforcing portion 45 to the inner edge in the width direction of the other upper reinforcing portion 45 in the width direction of the short side wall 31 of the folding container 10. Distance.

Next, how the lid member 50 is used will be described.
When the lid member 50 is used with the upper long side wall 21U and the upper short side wall 31U in the folding container 10 standing, the side plates 52 of the lid member 50 are positioned outside the long side walls 21 of the folding container 10. The lid member 50 is put on the folding container 10 as described above. Here, as described above, a gap is provided between the stopper portion 53 and each side plate 52 in the lid member 50. Therefore, when the lid member 50 is put on the folding container 10 as described above, the tip of the upper long side wall 21U in the long side wall 21 is located between the stopper portion 53 and the side plate 52 in the lid member 50 as shown in FIG. Fit into the gap. As a result, the stopper portion 53 is disposed between the pair of upper long side walls 21U. Therefore, when the lid member 50 moves in the longitudinal direction with respect to the folding container 10, the stopper portion 53 of the lid member 50 contacts the inner surface of the upper short side wall 31U of the folding container 10 and moves further in the longitudinal direction. Is regulated.

  Further, as shown in FIG. 3, the lid member 50 can also be used for the folding container 10 in a folded state in which the upper short side wall 31U and the upper long side wall 21U are rotated inward by 90 ° in the folding container 10. . When the container 10 in the folded state is covered with the lid member 50, the side plates 52 of the lid member 50 cover the entire area of the long side wall 21 of the folded container 10, and the lower ends of the side plates 52 of the lid member 50 are Then, the folding container 10 abuts on the placement surface on which the folding container 10 is placed.

  Further, as shown in FIG. 9, the predetermined distance X3 from the outer edge of one stopper part 53 to the outer edge of the other stopper part 53 in the lid member 50 is the width of the short side wall 31 of the folding container 10. In the direction, the distance from the inner edge in the width direction of one upper reinforcing portion 45 to the inner edge in the width direction of the other upper reinforcing portion 45 is slightly smaller. Therefore, when the lid member 50 is put on the folded folding container 10, the stopper portion 53 of the lid member 50 is formed on the step formed by the upper surface (outer surface) of the upper long side wall 21 </ b> U and the upper reinforcing portion 45. It will be in the fitted state. In this state, the movement of the lid member 50 in the longitudinal direction (left-right direction in FIG. 9) with respect to the folding container 10 is restricted by the stopper portion 53 of the lid member 50 coming into contact with the upper reinforcing portion 45 of the folding container 10.

According to the embodiment, the following effects can be achieved.
According to the folding container 10 described above, when the upper long side wall 21U of the long side wall 21 is turned inward by 90 °, the inner surface (the lower surface in the folded state) of the upper long side wall 21U is the protruding portion 33 of the short side wall 31. It abuts on the tip. In this state, at least a part of the weight of the upper long side wall 21 </ b> U is received by the protruding portion 33 of the short side wall 31. When another folding container 10 is stacked on the folded folding container 10, the weight of the upper folding container 10 acts on the upper long side wall 21 </ b> U of the lower folding container 10. Even in such a case, the weight of the upper folding container 10 is received by the protruding portion 33 of the short side wall 31 through the upper long side wall 21U. Therefore, it can suppress that the weight of the upper long side wall 21U acts on the 2nd thin part 32 of the short side wall 31 too much, As a result, it can suppress that the 2nd thin part 32 is damaged.

  -Furthermore, in said folding container 10, the protrusion length (predetermined distance X1) of the protrusion part 33 of the short side wall 31 is the same as the thickness of the upper short side wall 31U. Therefore, in a state where the upper short side wall 31 回 動 is turned 90 ° inward, the tip of the projecting portion 33 can be positioned on the same plane as the outer surface (upper surface in the folded state) of the upper short side wall 31U. With such a positional relationship, the protrusion 33 does not protrude more than necessary while allowing the weight of the upper long side wall 21U to be appropriately received. Further, in the standing state of the upper short side wall 31U, the tip surface of the projecting portion 33 and the inner side surface of the receiving recess 35 are in surface contact, so that the weight of the standing upper and lower side wall 31U is received also by the tip surface of the projecting portion 33. Can do. Therefore, it is possible to suppress the weight of the upper and short side walls 31U in the standing state from acting on the second thin portion 32.

  In the above folding container 10, the height position of the first thin portion 22 of the long side wall 21 coincides with the position of the tip of the protruding portion 33 on the short side wall 31. Therefore, in a state where the upper long side wall 21U is rotated inward by 90 ° and brought into contact with the tip of the protruding portion 33, the inner surface (the lower surface in the folded state) of the upper long side wall 21U is in surface contact with the tip of the protruding portion 33. To do. As a result, for example, when another folding container 10 is stacked on the folded folding container 10, the weight of the upper folding container 10 is applied to the protruding portion 33, and the entire protruding portion 33 receives the weight. be able to.

  -According to said folding container 10, in the short side wall 31, the planar view shape of the protrusion part 33 which protrudes from the upper end part of lower short side wall 31D, and the planar view of the accommodation recessed part 35 hollow at the lower end part of the upper short side wall 31U The shape is the same. Therefore, in the state where the upper short side wall 31U is erected, the housing recess 35 is blocked by the protrusion 33, and a hole that penetrates the short side wall 31 in the thickness direction is not formed. In addition, when the upper short side wall 31U is erected, the tip surface of the protrusion 33 and the bottom surface of the housing recess 35 (upper surface when the upper short side wall 31U is erected) are in surface contact. Therefore, even if a force acts on the upper short side wall 31U in the standing state from the upper side to the lower side, the force is applied to the lower short side wall 31D via the bottom surface of the housing recess 35 and the tip surface of the protrusion 33. Can be transmitted to. Therefore, an excessive force is suppressed from acting on the second thin portion 32 of the short side wall 31, and a decrease in the vertical compressive strength of the short side wall 31 with the upper short side wall 31U raised is minimized. It is done. In addition, other folding containers 10 may be stacked in a state where the upper long side wall 21U and the upper short side wall 31U are erected, but even in this case, the weight of the upper folding container 10 is used as the force. Can be transmitted to the lower short side wall 31D through the bottom surface of the housing recess 35 and the tip surface of the protrusion 33.

  -According to said folding container 10, the 1st thin part 22 is formed by forming incision (half cut) in the long side wall 21. As shown in FIG. Therefore, in the state where the upper long side wall 21U is erected, the upper long side wall 21U and the lower long side wall 21D come to form a flat plate. Therefore, it is easy to wipe off dirt and the like on the outer surface of the long side wall 21 in the state where the upper long side wall 21U is erected, and the appearance of the upper long side wall 21U and the lower long side wall 21D is also improved. Figured. This also applies to the second thin portion 32 in the short side wall 31.

  -According to the folding container 10 described above, when the upper reinforcing portion 45 is turned inward together with the upper long side wall 21U, the upper reinforcing portion 45 abuts on the support surface 43 of the notch portion 42 in the lower reinforcing portion 41, The weight of the upper reinforcing portion 45 and the upper long side wall 21U can be received by the lower reinforcing portion 41. Moreover, since this support surface 43 is a surface parallel to the bottom wall 11, when the folding container 10 is mounted in a horizontal surface, the support surface 43 is also horizontal. If the support surface 43 is inclined, a part of the weight of the upper reinforcing portion 45 and the upper long side wall 21U is converted into a downward force according to the inclination of the support surface 43, and the downward force is converted into the long side wall 21. May act on the first thin portion 22. In this regard, if the weight of the upper reinforcing portion 45 and the upper long side wall 21U can be received by the horizontal support surface 43 as described above, these weights act on the first thin portion 22 of the long side wall 21 and the first thin wall It can suppress that the part 22 is damaged.

  -According to the length setting in the standing direction of the side plate 52 in the lid member 50, when the lid member 50 is put on the folded folding container 10, the tip of the side plate 52 of the lid member 50 is placed on the folding container 10. It abuts on the mounting surface. Therefore, for example, even when another folding container 10 or the like is loaded on the upper side of the lid member 50, it is possible to suppress the weight from acting on the folding container 10 disposed on the inner side of the lid member 50.

  -According to the stopper part 53 of the lid member 50 described above, when the folded container 10 is put on the folded container 10, the upper part side wall 21 </ b> U upper surface (outer surface) and the upper reinforcing part 45 are configured. The stopper 53 of the lid member 50 is fitted in the step. In this state, the movement of the lid member 50 in the longitudinal direction with respect to the folding container 10 is restricted by the stopper portion 53 of the lid member 50 coming into contact with the upper reinforcing portion 45 of the folding container 10. Therefore, the lid member 50 can be prevented from being displaced with respect to the folding container 10 due to external impact, vibration, or the like.

  In the lid member 50 described above, a gap is provided between the stopper portion 53 and each side plate 52. Therefore, when the lid member 50 is put on the folding container 10 in which the upper long side wall 21U and the upper short side wall 31U are standing, the tip of the upper long side wall 21U in the long side wall 21 is connected to the stopper portion 53 and the side plate 52 in the lid member 50. Fit into the gap between. As a result, the stopper portion 53 is disposed between the pair of upper long side walls 21U. Therefore, when the lid member 50 moves in the longitudinal direction with respect to the folding container 10, the stopper portion 53 of the lid member 50 contacts the inner surface of the upper short side wall 31U of the folding container 10 and moves further in the longitudinal direction. Is regulated.

The above embodiment can be modified as follows.
The hollow plate material constituting the bottom wall 11, the long side wall 21, and the short side wall 31 of the folding container 10 is made of a synthetic resin having a hollow structure therein and has a certain degree of rigidity. But it can be applied. In addition to those exemplified in the above embodiment, for example, those described in JP 2014-205341 A can be mentioned. Further, a plastic cardboard or the like having a harmonica cross section may be used.

  In the above embodiment, the bottom wall 11 and the long side wall 21 are formed by bending a single hollow plate material, and the short side wall 31 is fixed to the bottom wall 11 by resin welding. The method for forming the short side wall 31 is not limited to this. Not only the long side wall 21 but also the short side wall 31 may be formed by bending a hollow plate material. In this case, the bottom wall 11, the pair of long side walls 21, and the pair of short side walls 31 are formed of a single hollow plate material. Further, not only the short side wall 31 but also the long side wall 21 may be fixed by resin welding. The manufacturing method is not limited as long as the bottom wall 11, the long side wall 21, and the short side wall 31 constitute a rectangular box-like folding container 10 as a whole.

  The bottom wall 11 of the folding container 10 is not limited to a rectangular plate shape, but may be a square plate shape. In addition, when the bottom wall 11 is a square plate shape, the side wall extended from the end of the bottom wall 11 corresponds to the first side wall, and the side wall disposed between the pair of first side walls is the first side wall. It corresponds to 2 side walls.

  -The structure which makes the upper short side wall 31U and the upper side reinforcement part 45 removable in the folding container 10 is not restricted to the hook_and_loop | surface fastener 36 illustrated in the said embodiment. For example, a convex portion or a concave portion is formed on the outer surface of the upper short side wall 31U, a concave portion or a convex portion is formed on the inner surface of the upper reinforcing portion 45, and the upper short side wall 31U is attached to the upper reinforcing portion 45 by fitting them together. It may be possible. Moreover, the upper short side wall 31U and the upper reinforcing part 45 may be made detachable by providing a lock mechanism separate from the upper short side wall 31U and the upper reinforcing part 45.

  -The 1st thin part 22 in the long side wall 21 of the folding container 10 is not restricted to forming by cutting. For example, the thin wall portion may be formed by compressing while heating a part of the long side wall 21 as in heat ruled line processing. As long as the inner wall of the hollow plate member can be cut and the bending rigidity can be reduced by partially thinning the long side wall 21, the thin wall portion can be hinged by any method. Can function as. This also applies to the second thin portion 32 in the short side wall 31.

  -The formation position of the 1st thin part 22 in the long side wall 21 of the folding container 10 is not restricted to the example of the said embodiment. The formation position of the first thin portion 22 may be a position higher than the formation position of the second thin portion 32 of the short side wall 31 by a thickness (predetermined distance X1) of the upper short side wall 31U.

  -In the width direction of the short side wall 31, the formation position of the protrusion part 33 can be changed suitably. For example, the protrusions 33 may be provided at both ends of the short side wall 31 in the width direction of the short side wall 31. Thus, by providing the protrusions 33 at both ends of the short side wall 31, when a force such as torsion acts on the folding container 10, it is difficult for the force to act on the second thin portion 32, and the second thin portion 32. Damage can be suppressed. Further, if the protruding portion 33 is provided at a position where the tip of the upper long side wall 21U contacts when the upper long side wall 21U is rotated inward, the tip of the upper long side wall 21U is warped or bent. Deformation can be suppressed.

  -The protrusion length of the protrusion part 33 in the short side wall 31 of the folding container 10 can be changed suitably. For example, a U-shaped reinforcing member may be attached so as to cover the tip of the upper long side wall 21U. In this case, if the protruding length of the protruding portion 33 is set in consideration of the thickness of the reinforcing member attached to the tip of the upper long side wall 21U, the upper long side wall 21U is rotated inwardly. The side wall 21U can be parallel to the bottom wall 11. For example, the protrusion length of the protrusion 33 may be larger than the thickness (predetermined distance X1) of the upper short side wall 31U. Furthermore, depending on the inward rotation range of the upper short side wall 31U, the protruding length of the protruding portion 33 may be smaller than the thickness of the upper short side wall 31U. For example, when the upper short side wall 31U is rotated inward by approximately 180 °, the height position of the base end of the upper short side wall 31U is substantially the same as the height position of the second thin portion 32. Therefore, in this case, the weight of the upper long side wall 21 </ b> U is prevented from acting on the second thin portion 32 of the short side wall 31 as long as the position of the tip of the protruding portion 33 is above the second thin portion 32. it can. In addition, when the protrusion length of the protrusion part 33 is made smaller than the thickness of the upper short side wall 31U, the height position of the front end surface of the protrusion part 33 becomes lower than the height position of the first thin part 22 of the long side wall 21.

  -In the folding container 10, the dimension of the notch part 42 in the lower side reinforcement part 41 can be changed suitably. In particular, even if the dimension of the notch 42 in the width direction of the short side wall 31 is changed, if the dimension of the notch 42 in the width direction of the short side wall 31 does not change, the upper reinforcing portion 45 is connected to the support surface 43 of the notch 42. Can support. Therefore, for example, the cutout portion 42 may be formed into a rectangular shape that is long in the width direction of the short side wall 31 instead of being formed into a square shape with one side having a predetermined distance X2. That is, when the upper reinforcing portion 45 is turned inward together with the upper long side wall 21U, the upper reinforcing portion 45 can be prevented from interfering with the lower reinforcing portion 41, and the upper reinforcing member in a state of being turned inwardly. If the support surface 43 which can support the part 45 is formed, the dimension of the up-down direction of the notch part 42 and the width direction can be changed.

  In the folding container 10, instead of providing the notched portion 42 in the lower reinforcing portion 41, a notched portion may be provided at the lower end portion of the upper reinforcing portion 45. In this case, if the upper end surface of the lower reinforcing portion 41 is a surface parallel to the bottom wall 11, a part of the upper end surface of the lower reinforcing portion 41 functions as a support surface that contacts the upper reinforcing portion 45.

  -The support surface 43 in the lower side reinforcement part 41 does not necessarily need to be parallel to the bottom wall 11. For example, the lower reinforcing portion 41 may be provided with an arc-shaped notch, and the arc-shaped curved surface may function as the support surface 43. In this case, for example, a protrusion corresponding to the shape of the cutout portion 42 of the lower reinforcement portion 41 is provided at the lower end portion of the upper reinforcement portion 45, and the tip surface of this protrusion portion supports the cutout portion 42 in the lower reinforcement portion 41. The surface 43 is preferably in surface contact. As described above, even if the support surface 43 of the lower reinforcing portion 41 is inclined, the support surface 43 can receive a part of the weight of the upper reinforcing portion 45 and the upper long side wall 21U.

  If the lower reinforcing portion 41 does not receive a part of the weight of the upper reinforcing portion 45 or the upper long side wall 21U, the upper reinforcing portion 45 is turned inward together with the upper long side wall 21U when the upper reinforcing portion 45 is turned inward. The portion 45 may not contact the lower reinforcing portion 41. Further, either one or both of the lower reinforcing portion 41 and the upper reinforcing portion 45 may be omitted.

  -In the lid member 50 of the said embodiment, the length of the standing direction of the side plate 52 can be changed suitably. However, if the length of the side plate 52 in the standing direction is made longer than that of the above embodiment, the inner surface of the top plate 51 in the lid member 50 and the folding container 10 even if the lid member 50 is put on the folded folding container 10. There will be a gap between the two.

  In the lid member 50, one or both of the pair of stopper portions 53 may be omitted. For example, if it is assumed that the lid member 50 is slid in the longitudinal direction relative to the folding container 10 to expose the inside of the folding container 10, the stopper member 53 is provided in the lid member 50. Sometimes it is better not.

  The folding container 10 is not limited to being used with the lid member 50, and only the folding container 10 can be used alone. What is necessary is just to determine whether it uses with the cover member 50 according to the condition etc. in which the folding container 10 is used.

The following technical idea can be derived from the embodiment and the modified examples.
-The protrusion length of a protrusion part is more than the thickness of a 2nd upper side wall.
-The formation position of the 1st thin part of the 1st side wall in the standing direction of a 1st side wall is the same position as the position of the front-end | tip of a protrusion part.

  A lid member used together with the folding container, the lid member including a square plate-like top plate and a pair of side plates erected along the long side of the top plate, and the inner surface of the top plate Is provided with a stopper for restricting the movement of the lid member in the longitudinal direction with respect to the folding container in a state where the lid member is placed on the folding container.

  DESCRIPTION OF SYMBOLS 10 ... Folding container, 11 ... Bottom wall, 21 ... Long side wall, 21D ... Lower long side wall, 21U ... Upper long side wall, 22 ... First thin part, 31 ... Short side wall, 31D ... Lower short side wall, 31U ... Upper short side wall , 32 ... 2nd thin part, 33 ... Projection part, 35 ... Housing recess, 36 ... Hook fastener, 41 ... Lower reinforcement part, 42 ... Notch part, 43 ... Support surface, 45 ... Upper reinforcement part, 50 ... Lid member 51 ... Top plate, 52 ... Side plate, 53 ... Stopper part.

Claims (2)

It consists of a hollow plate material made of synthetic resin having a hollow structure inside, a square plate-like bottom wall, a pair of opposed first side walls standing on the periphery of the bottom wall, and standing on the periphery of the bottom wall A quadrangular box-like folding container comprising a pair of opposing second side walls disposed between the pair of first side walls,
The first side wall includes a first thin wall portion extending in a width direction of the first side wall, a first lower side wall located on the bottom wall side with respect to the first thin wall portion, and an upper side of the first lower side wall. And a first upper side wall that is pivotable inward with respect to the first lower side wall by the first thin portion,
The second side wall includes a second thin wall portion extending in a width direction of the second side wall, a second lower side wall located on the bottom wall side with respect to the second thin wall portion, and an upper side of the second lower side wall. And having a second upper side wall pivotable inward with respect to the second lower side wall by the second thin part,
The second lower side wall is provided with a protruding portion that protrudes from the upper end of the second lower side wall so as to extend above the second thin portion, and the second upper side wall includes the second upper side wall. An accommodation recess that is recessed from a base end portion that is an end portion on the second lower side wall side to a front end side of the second upper side wall,
The folding container, wherein the projecting portion is located inside the accommodating recess in an upright state in which the second upper side wall is erected in the same direction as the erected direction of the second lower side wall. A lower reinforcing portion that covers from the outer surface at the widthwise end of the first lower side wall to the outer surface at the widthwise end of the second lower wall is attached to the widthwise end of the first lower wall. And
The upper end that covers from the outer surface at the end in the width direction of the first upper side wall to the outer surface at the end in the width direction of the second upper side wall in the standing state is disposed at the end in the width direction of the first upper side wall. The reinforcement part is attached,
The lower reinforcing portion is provided with a support surface that contacts the upper reinforcing portion and supports the upper reinforcing portion in a state where the first upper side wall is rotated inward together with the upper reinforcing portion. The folding container according to claim 1, wherein the support surface is a surface parallel to the bottom wall.

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