JP2019202804A - Folding container - Google Patents

Abstract

To provide a folding container capable of reducing a height in a folded state while stabilizing a shape in an assembled state.SOLUTION: When a folding container 1 is changed from a folded state to an assembled state, a short side wall part 7 can be set to a standing position by setting a pair of opposing long side wall parts 6 to the standing position. An engaging wall 15 projecting inward is provided on both sides of the long side wall part 6, and an engagement projection 26 that is inserted into an engagement hole 16 of the engaging wall 15 in the assembled state is provided on the outer surface side of the short side wall part 7. The engagement projection 26 provided on an overlapping part 7a which is a portion where the short side wall parts 7 overlap with each other in the folded state in the short side wall part 7 includes a main engagement projection 52 that projects outward from the outer surface of the short side wall part 7. When horizontally laid on the upper side of the pair of short side wall parts 7 in the folded state, the short side wall part 7 includes an engagement storage part 56 that stores the main engagement projection 52 of the lower short side wall part 7.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a folding container used for transporting articles.

  Conventionally, a bottom wall portion having a substantially rectangular shape in plan view, and a bottom wall constituting portion including a base portion protruding upward along each side portion of the bottom wall portion, and each base portion, A side wall portion that is pivotably displaced between a standing position that is erected above each base portion and a laying position that is laid down above the bottom wall portion, and all the side wall portions are in the standing position. There is known a folding container that can be changed between an assembled state and a folded state in which all side wall portions are in a laying position.

  Furthermore, the side wall part of the folding container that can be folded as described above includes a pair of opposed first side wall parts and a pair of opposed second side wall parts, and the folding container is generally changed from a folded state to an assembled state. In this case, the second side wall portion cannot be set to the standing position unless the pair of first side wall portions are first set to the standing position. In addition, both side portions of the first side wall portion protrude from the inner surface of the first side wall portion, and in the assembled state of the folding container, contact with the outer surface of the second side wall portion to cause outward displacement of the second side wall portion. Support protrusions are provided to prevent.

  In addition, on the outer surface side of the second side wall portion, it protrudes outward, and in the assembled state of the folding container, the engagement protrusion inserted into the recessed or hole-shaped engaged portion provided in the support protrusion. Is provided. When the engaging protrusion is inserted into the engaged portion (becomes engaged), the outward displacement of the first side wall is restricted, and the first side wall and the second side wall The relative displacement in the up-down direction is regulated.

  Furthermore, when the folding container is in the folded state, in the configuration in which the pair of opposing second side wall portions overlap each other, the second side wall portion overlaps the second side wall portions in the folded state of the folding container ( There is a technique of making the thickness of the upper side portion thinner than the other portions (lower side side) (see, for example, Patent Document 1). In this case, the height of the folding container in the folded state can be suppressed as low as possible, and for example, the space efficiency when transporting and storing the folded containers in the folded state can be improved. .

JP 2001-287737 A

  By the way, the engagement protrusion provided on the outer surface side of the second side wall portion is the “site where the second side wall portions overlap in the folded state of the folding container” in the second side wall portion in Patent Document 1, that is, “thickness”. Is also disposed at “a portion configured relatively thin”. For this reason, for example, in the folded state of the folding container, the engagement protrusion of the lower second side wall portion of the pair of second side wall portions comes into contact with the surface facing the lower side of the upper second side wall portion. In order to avoid a situation where the upper second side wall portion has to be supported only by the engaging projection, the engaging projection is provided so as to be within the thickness range of the second side wall portion.

  However, when the thickness of the second side wall at the portion where the engagement protrusion is provided is relatively thin, the engagement protrusion is small (the protrusion length is short). In this case, there is a concern that the engagement state between the engagement protrusion and the engaged portion is likely to be released, and the folded container is assembled by engaging the engagement protrusion and the engaged portion. There is a risk that the effects such as stabilization of the above will not be sufficiently achieved.

  The present invention has been made to solve the above-described problems and the like, and its purpose is to provide a folding container capable of reducing the height in the folded state while stabilizing the assembled state. There is to do.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to the means to respond | correspond as needed are added.

Means 1. A bottom wall portion having a substantially rectangular shape in plan view, and a bottom wall constituting portion including a base portion provided on the upper surface side of the bottom wall portion along each side portion of the bottom wall portion;
Connected to each base portion of the bottom wall constituting portion so as to be rotatable and displaceable between a standing position standing above each base portion and a laying position lying above the bottom wall portion. A side wall portion,
In a folding container that can change state between an assembled state in which all the side wall portions are in the standing position and a folded state in which all the side wall portions are in the laying position,
The base portion includes a pair of first base portions that protrude upward from a pair of opposite side portions of the bottom wall portion, and a bottom wall portion between both ends of the pair of first base portions. A pair of opposing second base parts provided along the side sides of the
The side wall portion includes a pair of first side wall portions respectively connected to the first base portions, and a pair of second side wall portions respectively connected to the second base portions.
When the folded state is set to the assembled state, the second side wall portion can be set to the standing position by setting the pair of first side wall portions to the standing position.
In the folded state, the second side wall portions that are in the laying position overlap each other vertically,
Support protrusions protruding from the inner surface of the first side wall are provided on both sides of the first side wall,
On the outer surface side of the second side wall portion, there is provided an engagement protrusion that protrudes outward and is engaged with the engaged portion of the support protrusion in the assembled state.
The engagement protrusion is provided in an overlapping portion that is a portion where the second side wall portions overlap each other in the folded state, at least in the second side wall portion,
At least one of the engaging protrusions provided in the overlapping part is configured as a main engaging protrusion protruding outward from the outer surface of the overlapping part of the second side wall part,
In the folded state, the second side wall portion accommodates the main engagement protrusion of the second side wall portion on the lower side when the second side wall portion is in the laid position on the upper side of the pair of second side wall portions. A collapsible container characterized in that it comprises a joint housing part.

  According to the means 1, the main engagement projection provided on the outer surface side of the second side wall portion protrudes outward from the outer surface of the second side wall portion, and the folding container is folded in the second side wall portion. In FIG. 2, the second side wall portions are provided in the overlapping portion, which is the overlapping portion. Further, the second side wall portion is provided with an engagement accommodating portion, and in the folded state of the folding container, the main side of the lower second side wall portion of the pair of second side wall portions set in the laying position. The engaging protrusion is accommodated in the engaging accommodating portion of the upper second side wall portion. For this reason, even if it is the structure in which the main engagement protrusion which protrudes outward rather than the outer surface of a 2nd side wall part is provided in the duplication part of a 2nd side wall part, in the folding state of a folding container, it is the 2nd lower side wall. Interference between the main engagement protrusion of the portion and the surface facing the lower side of the upper second side wall portion, and the height of the upper second side wall portion of the pair of overlapping second side wall portions The position can be positioned as low as possible. As a result, the height of the folding container in the folded state, and consequently the height when the folded containers in the folded state are stacked up and down (stacked) can be reduced as much as possible. The storage efficiency can be improved.

  Further, in the folded state of the folding container, the upper second side wall portion of the pair of second side wall portions in the laying position is supported only by the engaging protrusion of the lower second side wall portion. It can be avoided. Therefore, in the folded state of the folding container, the engaging projection of the lower second side wall portion and the portion of the upper second side wall portion that vertically opposes the engaging projection of the lower second side wall portion are deformed. Or damage can be prevented.

  Moreover, since the main engagement protrusion can be protruded outward rather than the outer surface of the 2nd side wall part, the protrusion length can fully be ensured. Therefore, the engagement state between the main engagement protrusion and the engaged portion can be made stronger, and as a result, the shape of the folding container in the assembled state can be stabilized. In particular, when the thickness of the overlapping portion of the second side wall portion is thin, if the main engagement protrusion does not protrude outward from the outer surface of the second side wall portion, a desired protrusion length of the main engagement protrusion is ensured. There is a concern that it is not possible. In this regard, as described above, the second side wall portion is provided with the engagement accommodating portion that can avoid interference with the main engagement projection, so that the main engagement projection can be moved outwardly from the outer surface of the second side wall portion without hindrance. The effect of improving the efficiency of carrying and storing the folded container in the folded state can be more effectively exhibited.

Mean 2. The overlapping portion is provided with a plurality of engaging projections corresponding to each side portion of the second side wall portion,
As the engagement protrusions provided corresponding to the respective side portions of the second side wall portion in the overlapping portion, the main engagement protrusion and the sub-engagement protrusion that falls within the thickness range of the second side wall portion. Provided,
The folding container according to means 1, wherein the main engaging protrusion is configured to have a width in the width direction of the second side wall portion larger than that of the sub engaging protrusion.

  According to the means 2, the burden of the main engagement protrusion in the assembly state of the folding container is reduced without increasing the number of the engagement accommodating parts or the formation range by providing the sub-engagement protrusion in the overlapping portion. Can be made. Further, since the width of the main engagement protrusion is configured to be relatively large, the strength of the main engagement protrusion can be increased, and deformation and damage of the main engagement protrusion can be prevented. Accordingly, it is possible to further stabilize the engagement state between the main engagement protrusion and the engaged portion.

  It should be noted that “the main engagement protrusions are provided above the other engagement protrusions”. That is, among the second side wall portions, the engagement projection closest to the upper side portion, which is the portion that is the largest relative displacement with respect to the first side wall portion, is used as the main engagement projection. The effect that the state of engagement with the portion is stabilized is more effectively achieved. Further, for example, in the assembled state of the folding container, when a force that causes the first side wall portion in the standing position to be displaced outwards is generated, the uppermost engaging protrusion on which a relatively large force is easily applied is formed. By increasing the lateral width of the main engagement protrusion, deformation and breakage of the engagement protrusion can be effectively suppressed.

  Means 3. In the folded state, the first side wall portion includes an allowance portion that accommodates the main engagement protrusion of the second side wall portion that is set as the sleeping position on the upper side of the pair of second side wall portions. The folding container according to means 1 or 2, characterized in that.

  According to the means 3, since the allowance portion is provided on the first side wall portion, in the folded state of the folding container, the engagement of the upper second side wall portion among the pair of second side wall portions set to the sleeping position. The mating protrusion is accommodated in the permission portion of the first side wall portion. For this reason, in the folded state of the folding container, it is possible to avoid interference between the main engagement protrusion of the upper second side wall portion and the surface facing the lower side of the first side wall portion. The height position can be positioned as low as possible. As a result, the effect of improving the efficiency of carrying and storing the folded container in the folded state is further exhibited. Furthermore, in the folded state of the folding container, it is possible to avoid a situation in which the first side wall portion that is in the laying position is supported only by the engaging protrusion of the upper second side wall portion. Therefore, in the folded state of the folding container, the engagement protrusion of the upper second side wall part, the deformation of the part of the first side wall part facing the engagement protrusion of the upper second side wall part, and the damage, etc. Can be prevented.

  In the folded state, in the folded state, the first side wall portions that are in the laying position overlap each other in the vertical direction, and the first side wall portion is the one of the pair of first side wall portions in the folded state. It is good also as providing the support protrusion accommodating part which accommodates the said support protrusion of the said 1st side wall part of an upper side when it is set as the said sleeping position on the lower side. In this case, in the folded state of the folding container, in the configuration in which the first side wall portions also overlap each other, the height position of the first side wall portion that is placed on the upper side of the pair of first side wall portions, and hence the folded state in the folded state. The height of the container can be made as low as possible. Therefore, like the above-described means 1, in the folded state of the folding container, combined with the configuration in which the height of the pair of overlapping second side wall portions is made as low as possible, the height of the folding container in the folded state is further suppressed. Can do.

  Further, “the second base portion is a support protrusion that accommodates the support protrusion of the first side wall portion that is located at the lower position of the pair of first side wall portions in the folded state. It is good also as providing the acceptance | permission part. In this case, in the folded state of the folding container, the height position of the first side wall portion, which is the laying position on the lower side of the pair of first side wall portions, and consequently the height of the folded folding container is minimized. Can do.

It is a perspective view which shows the folding container in an assembly state. It is a perspective view which shows the folding container in a folded state. It is a perspective view which shows the folding container in the process of changing a state from one side to the other among a folding state and an assembly state. It is the perspective view which looked at the short side wall part from the inner surface side. It is the perspective view which looked at the short side wall part from the outer surface side. It is a partial expansion perspective view which shows the J section of FIG. It is sectional drawing which shows a folding container in a state in which a pair of short side wall part exists in a sleeping position, and a long side wall part exists in a standing position. It is a partial expansion perspective view containing the partial cross section of the folding container of the state which has one short side wall part in a laying position, and a long side wall part in a standing position. It is a partial expansion perspective view containing the partial cross section of the folding container in an assembly state. It is a perspective view containing the partial cross section of the folding container in a folded state.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIGS. 1, 3, and the like, the folding container 1 protrudes upward from the bottom wall part 3 along the long side part of the bottom wall part 3 having a substantially rectangular shape in plan view and the bottom wall part 3. A long side base part 4 as a first base part, and a short side base part 5 as a second base part protruding upward from the bottom wall part 3 along each short side part of the bottom wall part 3; The bottom wall structure part 2 which comprises is provided. Furthermore, the folding container 1 has a long side wall portion 6 as a first side wall portion that is rotatably connected to each long side base portion 4, and a short side side base portion 5. And a short side wall portion 7 as a second side wall portion connected so as to be rotatable. The bottom wall constituting part 2, the long side wall part 6, and the short side wall part 7 of the present embodiment are made of polypropylene. In FIG. 3 (and FIG. 8), for convenience, one of the pair of long side wall portions 6 (the front side in the drawing) is not shown.

  Further, as shown in FIGS. 1 and 2, the long side wall 6 and the short side wall 7 stand above the long side base 4 and the short side base 5, respectively. It is comprised so that rotation displacement is possible between the standing position provided and the laying position laid down on the bottom wall part 3. As shown in FIG. Furthermore, as shown in FIG. 3 etc., the protrusion length from the bottom wall part 3 of the long side base part 4 is longer than the protrusion length from the bottom wall part 3 of the short side base part 5. In addition, the width of the long side wall 6 is substantially the same as the length of the bottom wall component 2, and the width of the short side wall 7 is between the pair of long sides 4. It is almost the same as the distance.

  For this reason, in this embodiment, the folding container 1 in the assembly state (see FIG. 1) in which all the long side wall portions 6 and the short side wall portions 7 are in the standing position is used for all the long side walls. When the side wall portion 6 and the short side wall portion 7 are in the folded state (see FIG. 2), the pair of short side wall portions 7 are shown in FIGS. Is first displaced to the laying position, and then the long side wall 6 is displaced to the laying position. As shown in FIGS. 2 and 10, when the folding container 1 is in the folded state, the side wall 7 on the short side, which is the laying position, overlaps above the bottom wall 3, The long side wall portion 6 is overlapped above the short side wall portion 7. Further, when the folding container 1 is changed from the folded state to the assembled state, the pair of long side wall portions 6 can be set to the upright position so that the short side wall portion 7 can be set to the upright position. Yes.

  As shown in FIG. 1, FIG. 3, etc., each long side wall 6 is provided along a long side base plate 11 having a substantially rectangular shape when viewed from the front, and an upper side of the long side base plate 11. A long-side upper frame portion 12 that protrudes outward from the side-side base plate 11, a long-side lower-side rib 13 that protrudes outward from the lower-side portion of the long-side base plate 11, and a long-side lower-side rib 13. A long-side hinge portion 14 that protrudes downward from the lower surface and is pivotally supported by a long-side bearing portion 8 (see FIG. 3 and the like) provided on the long-side base portion 4 is provided. The long side upper frame portion 12 of the present embodiment is formed in a step shape, and includes an inner lower step portion 12a and an outer upper step portion 12b, and has a substantially crank-shaped cross section.

  In addition, as shown in FIGS. 3, 7, 8, etc., engagement walls 15 as support protrusions projecting inward are provided on both side portions on the inner surface side of the long side wall portion 6. Yes. The engagement wall 15 of the present embodiment includes an upper engagement wall 15a provided on the upper part of the long side wall 6 including the upper end of the long side upper frame 12 and the long side base plate 11, An intermediate engagement wall 15b is provided at an intermediate position in the vertical width direction of the long side base plate 11 so as to be spaced downward from the upper engagement wall 15a. As shown in FIG. 8, each engagement wall 15 has an engagement hole portion 16 as an engaged portion penetrating in the lateral width direction of the long side wall portion 6 (two in the vertical direction in this example). Is provided.

  Further, as shown in FIGS. 3, 7, etc., the long side base plate 11 has a long side base plate 11 at a position close to each upper engagement wall 15 a and the long side upper frame portion 12. By forming a substantially U-shaped slit, an elastic piece 17a constituted by a portion surrounded by the slit, and a locking projection 17b projecting inward from the tip of the elastic piece 17a are provided. An elastic locking piece 17 provided is provided. Each elastic piece 17 a has a lower end portion connected to the long side base plate 11 and is configured to be elastically deformable in the thickness direction of the long side wall portion 6. The inner surface of the elastic piece 17 a is flush with the inner surface of the long side base plate 11, and the locking projection 17 b protrudes inward from the inner surface of the long side base plate 11.

  As shown in FIG. 7, the long side hinge portion 14 includes a hinge main body 14 a that protrudes downward from the lower surface of the long side lower rib 13, and both side surfaces of the hinge main body 14 a in the lateral width direction of the long side side wall portion 6. It has a pair of shaft protrusions 14b (see FIG. 10) protruding laterally from the lower end. Further, as shown in FIG. 1, on the outer surface side of the long side base plate 11, it extends along the height direction of the long side wall 6, and the long side upper frame 12 and the long side lower rib Long-side vertical ribs 18 are provided to connect the 13 and the like. In the present embodiment, the outer surface of the long side wall 6 is constituted by the outer edges of the long side upper frame 12, the long side lower rib 13, and the long side vertical rib 18. Further, the inner surface of the long side wall 6 is constituted by the inner surface of the long side base plate 11. The thickness of the long side wall 6 is between the outer surface and the inner surface of the long side wall 6.

  As shown in FIG. 4, FIG. 5, etc., each short side wall 7 has a short side base plate 21 having a substantially rectangular shape in front view, and a short side side along the upper side of the short side base plate 21. From the lower side upper frame portion 22 projecting outward from the base plate 21, the short side lower rib 23 projecting outward from the lower side portion of the short side base plate 21, and the lower surface of the short side lower rib 23 A short-side hinge portion 24 that protrudes downward and is pivotally supported by a short-side bearing portion 9 (see FIG. 3 and the like) provided on the short-side base portion 5 is provided. Furthermore, the outer side of the short side base plate 21 extends along the height direction of the short side wall 7, and connects the short side upper frame 22 and the short side lower rib 23. Short side vertical ribs 25 are provided. In the present embodiment, the outer surface of the short side wall portion 7 is configured by the outer edges of the short side upper frame portion 22, the short side lower rib 23, and the short side vertical rib 25. In addition, the inner surface of the short side wall 7 is constituted by the inner surface of the short side base plate 21. The thickness of the short side wall 7 is between the outer surface and the inner surface of the short side wall 7.

  Further, as shown in FIG. 10, in the present embodiment, the thickness of the short side wall portion 7 is made thinner than the thickness of the long side wall portion 6. For this reason, the short-side upper frame portion 22 also includes an inner lower step portion 22a and an outer upper step portion 22b, as in the long-side upper frame portion 12, but as shown in FIG. The upper step portion 22b of the short side upper frame portion 22 is constituted by the upper side portion of the vertical wall portion extending upward from the tip edge of the lower step portion 22a extending outward from the upper side portion of the short side base plate 21. As a whole, the short side upper frame portion 22 is generally L-shaped. As shown in FIGS. 4 and 5, the short-side hinge portion 24 includes a hinge main body 24 a and a shaft protrusion 24 b, similarly to the long-side hinge portion 14.

  Further, as shown in FIGS. 5, 6, etc., engaging projections 26 that project outward from the outer surface of the short side base plate 21 are provided on both sides of the outer side of the short side wall 7. Yes. And after displacing the long side wall part 6 to an upright position, the engagement protrusion 26 is each engagement of the long side wall part 6 by displacing the short side wall part 7 to an upright position. While being inserted into the engagement hole 16 provided in the wall 15, the outer surface of the short side wall 7 (the short side base plate 21, etc.) around the engagement protrusion 26 contacts the engagement wall 15. Or close to each other. With this configuration, the long side wall 6 and the short side wall 7 are prevented from being tilted and displaced outwardly from the long side wall 6 and the short side wall 7 in the standing position. The positional deviation in the up-down direction is prevented.

  Furthermore, by making the short side wall portion 7 into an upright position, the locking protrusion 17b of the elastic locking piece 17 contacts the inner surface of the short side base plate 21 of the short side wall portion 7, or It comes to be close. With this configuration, the inward tilting displacement of the short side wall portion 7 in the standing position is suppressed. In addition, a handle portion 27 is provided at the upper center of each short side wall portion 7 so that an operator can handle the folded container 1 in an assembled state.

  Moreover, as shown in FIG.1, FIG.3, FIG.7, FIG.9 etc., it extends upward from the upper side part of the long side wall part 6 in the standing position in the long side wall part 6 of this embodiment, A release position (see FIGS. 3 and 7) extending substantially parallel to the long side wall 6 and an inward side from the upper side of the long side wall 6 in the standing position, the long side wall A flap 31 is connected to a lock position (see FIGS. 1 and 9) extending substantially orthogonally to 6 so as to be rotatable and displaceable. The flap 31 includes a flap body 32 having substantially the same width as the distance between the pair of opposing short side walls 7 in the assembled state of the folding container 1, and the side of the flap body 32 on the long side wall 6 side. The connection hinge part 33 which protrudes from the side and the connection convex part 34 which protruded and provided to the side from the both sides of the flap main body 32 are provided.

  On the other hand, as shown in FIG. 7, FIG. 9, etc., the long side wall portion 6 extends inward and upward from the long side upper frame portion 12 to the upper part of the long side base plate 11. A connecting bearing portion 35 that opens and supports the connecting hinge portion 33 is provided. Furthermore, as shown in FIGS. 4, 5, and 9, the short side wall portion 7 has a short side wall portion 7 extending from the short side upper frame portion 22 to the top of the short side base plate 21. A connecting recess 36 that penetrates in the thickness direction and opens upward is provided.

  As shown in FIGS. 1 and 9, the long side wall 6 and the short side wall 7 are set to the upright position, and the flap 31 is set to the locked position, so that the connecting convex portion 34 of the flap 31 is formed. In addition, it is inserted into the connecting recess 36 of the short side wall 7. Further, as shown in FIG. 8 and the like, a locking concave portion 34a is provided on the lower surface side of the connecting convex portion 34, while the connecting concave portion 36 is accommodated in the connecting concave portion 36 as shown in FIG. A locking projection 36a is provided that is inserted into the locking recess 34a of the connecting projection 34 and locked. Therefore, in the assembled state of the folding container 1, the flap 31 is in the locked position, so that the tilting displacement to the inner side and the outer side of the long side wall portion 6 and the short side wall portion 7 is more reliably performed. It is to be prevented.

  In addition, as shown in FIG. 9, the surface (upper surface) of the flap body 32 of the flap 31 that is in the locked position in the assembled state of the folding container 1 is the lower step portion 12a of the long side upper frame portion 12 and the short side The height of the lower upper portion 22a of the side upper frame portion 22 is substantially the same. On the other hand, as shown in FIG. 7, the flap body 32 of the flap 31 that is set to the release position in the assembled state of the folding container 1 has an upper end at the upper end of the long side wall 6 (on the long side). The upper portion 12b) of the frame portion 12 protrudes upward, and the front and back surfaces of the flap body 32 are substantially flush with the outer and inner surfaces of the long side wall 6 (see FIG. 10).

  Further, the engagement wall 15 of the present embodiment has substantially the same thickness as the long side wall portion 6. Therefore, as shown in FIG. 1, even when the folding container 1 is in the assembled state, the engagement wall 15 may be in contact with or close to the short side base plate 21 of the short side wall portion 7. The outer surface of the short side wall 7 is thinner than the long side wall 6 (the outer edges of the short side upper frame 22, the short side lower rib 23, and the short side vertical rib 25). The inner wall of the engagement wall 15 is positioned inward. In addition, the connecting convex portion 34 of the flap 31 is shaped to be locked to the outer surface side of the short side wall portion 7 in the standing position, but the connecting convex portion 34 is more than the outer surface of the engaging wall 15. It is configured not to protrude outward.

  Moreover, as shown in FIG. 3, in this embodiment, the distance between a pair of short side base parts 5 is twice the vertical width of the short side wall part 7 (the short side base plate 21 described later). It is shorter than the length. For this reason, as shown in FIGS. 7 and 10, in a state where the pair of short side wall portions 7 is in the sleeping position (folded state of the folding container 1), the pair of short side wall portions 7 overlap each other. It is configured as follows. Hereinafter, a portion of the short side wall portion 7 where the short side wall portions 7 overlap in the folded state of the folding container 1 is also referred to as an “overlap portion 7a”. In this embodiment, it is an upper part including the upper side part of the short side wall part 7, and the range of about 1/4 of the vertical width of the short side wall part 7 (the short side base plate 21 described later) is a little less than 1/4. , “Overlapping part 7a”.

  Further, as shown in FIG. 3 and the like, the short-side bearing portions 9 of the pair of short-side base portions 5 have the same height position, and either of the pair of short-side side wall portions 7. Is also configured to be able to place the folding container 1 in a folded state by overlapping the pair of short side wall portions 7 one above the other. In particular, as shown in FIG. 7, in the present embodiment, in the folded state of the folding container 1, the short side wall 7 that is placed on the lower side of the pair of short side walls 7 is a bottom wall. The part including at least the upper side part of the short side base plate 21 and the part including the lower side part of the short side base plate 21 are extended on the upper surface and the surface of the bottom wall part 3. It is comprised so that it may contact | abut. Further, the short side wall portion 7 is displaced from the standing position to the laying position side, so that the axial protrusion 24b of the short side hinge portion 24 is short relative to the short side base portion 5. It is configured to be relatively displaceable up and down within a range that does not come out of the side bearing portion 9. And in the folded state of the folding container 1, the short side where the axial protrusion 24b of the short side wall part 7 which is set to the upper position among the pair of short side wall parts 7 is set to the lower position. It is located above the axial protrusion 24b of the side wall portion 7 and faces the lower side of the overlapping portion 7a of the upper short side wall portion 7 and the lower short side wall portion 7 of the lower side wall portion 7 In the overlapping portion 7a, a surface facing upward is brought into contact with a plurality of locations (by a surface).

  As will be described later, when the folding container 1 is in the folded state, the laying position with respect to the upper surface side of the upper short side wall part 7 among the pair of short side wall parts 7 set as the laying position. The posture of the short side wall portion 7 placed on the upper side may be maintained by the abutment of the long side wall portion 6 made to be a plurality of positions, or the short side wall portion 7 may be maintained. The position of the center of gravity is within the range of the overlapping portion 7a, and by setting the pair of short side wall portions 7 to the laying position, the posture of the short side wall portion 7 that is the laying position on the upper side is maintained. Also good.

  Further, the distance between the pair of long side base portions 4 is shorter than twice the vertical width of the long side wall portion 6 (long side base plate 11 described later). For this reason, in the folded state of the folding container 1, it is comprised so that a pair of long side wall part 6 may overlap up and down. In the present embodiment, when the folding container 1 is in the folded state, the flap 31 is set as the release position, and the long side wall portion 6 is set as the laying position, so that the pair of long side base portions 4 are positioned between The long-side side wall portion 6 that is in the laying position and the flap 31 that is in the release position are accommodated. Further, as will be described in detail later, in the folded state of the folding container 1, the long side wall 6 that is positioned at the lower side of the pair of long side walls 6 is a pair of short side walls 7. Among them, the surface facing the upper side of the short side wall portion 7 which is the laying position on the upper side is supported by being contacted (by a surface) at a plurality of locations. In addition, regarding the long side wall portion 6, the long side wall portion 6 is displaced from the standing position to the laying position side, so that the shaft protrusion 14b of the long side hinge portion 14 is The pair of upper and lower long side wall portions 6 which are configured to be displaced relative to the side base portion 4 in a range that does not come out of the long side bearing portion 8 and are placed in the laying position, respectively, are the bottom wall portion 3. It extends so as to be substantially parallel to.

  In addition, as shown in FIG. 2 and the like, auxiliary projections projecting above the short side base part 5 and connected to the upper surface side of the short side base part 5 at both ends of the long side base part 4 A portion 41 is provided. The upper side portion (upper surface) of the long side base portion 4 and the auxiliary convex portion 41 is higher than the long side wall portion 6 at the laying position (the long side wall portion 6 set at the laying position on the upper side). Is located.

  Moreover, as shown in FIG. 7, FIG. 10, etc., when the bottom wall part 3 of the bottom wall structure part 2 piled up the folding containers 1 in an assembly state (stacked), the lower folding container 1 The outer peripheral support part 42 that is supported in contact with the upper side parts of the side wall parts 6 and 7 and the inner peripheral side of the outer peripheral support part 42 are configured to be one step lower than the outer peripheral support part 42, and the folding container 1 is And an inner peripheral support portion 43 that is supported by being in contact with the floor surface when installed on the floor surface. When the folding containers 1 in an assembled state are stacked, the inner peripheral support part 43 is inserted into the lower folding container 1 and the inner surfaces of the side wall parts 6 and 7 of the lower folding container 1. It is comprised so that it may contact | abut or adjoin to.

  When the folding containers 1 in a folded state are stacked, the outer peripheral support part 42 of the upper folding container 1 is connected to the long side base part 4 and the auxiliary convex part 41 of the lower folding container 1. The inner peripheral support portion 43 of the upper folding container 1 is inserted between a pair of opposed long side base portions 4 of the lower folding container 1 and is supported on the upper surface. It is comprised so that it may contact | abut or adjoin to the inner surface of the side base part 4, and the inner surface of the auxiliary | assistant convex part 41. FIG.

  As described above, the upper engagement wall 15a and the intermediate engagement wall 15b are provided as the engagement walls 15 on both sides of the long side wall 6 and the engagement walls 15a and 15b are provided on the engagement walls 15a and 15b. On the other hand, two engagement holes 16 are provided on the upper and lower sides. In addition, the short side wall 7 is provided with engagement protrusions 26 to be inserted into the engagement holes 16 of the engagement walls 15a and 15b. In the present embodiment, three types having different shapes are provided. Engaging protrusions 26 are provided.

  More specifically, as shown in FIG. 5, two engagement protrusions 26 (hereinafter also referred to as “first engagement protrusions 51”) inserted into the engagement hole portions 16 of the upper engagement wall 15a are as follows. The short side wall portion 7 is provided in the overlapping portion 7a. On the other hand, the two engagement protrusions 26 (hereinafter also referred to as “second engagement protrusions 54”) inserted into the engagement hole 16 of the intermediate engagement wall 15 b are overlapped in the short side wall 7. It is provided at a position away from the portion 7a.

  As shown in FIGS. 6 and 7, of the pair of upper and lower first engagement protrusions 51, the upper first engagement protrusion 51 (hereinafter also referred to as “main engagement protrusion 52”) is on the short side side. The side wall 7 protrudes outward from the outer surface of the overlapping portion 7a. On the other hand, the lower first engagement protrusion 51 (hereinafter also referred to as “sub-engagement protrusion 53”) falls within the thickness range of the short side wall 7 (the outer surface of the short side wall 7). Further, as shown in Fig. 6, the width (width) in the width direction of the short side wall portion 7 of the main engagement protrusion 52 is the sub-engagement protrusion. 1, the first engaging protrusion 51 does not protrude outwardly from the outer surface of the engaging wall 15 in the assembled state of the folding container 1 as shown in FIG. It is configured as follows.

  In the short side wall 7, the sub-engagement protrusion 53 that fits within the thickness range of the short side wall 7 is located at a portion facing the inner surface of the engagement wall 15 in the assembled state of the folding container 1. In order to be able to engage with the engagement hole 16 of the engagement wall 15, a rib (short) that can basically constitute the outer surface of the short side wall 7 such as the short side vertical rib 25. Although the side-side vertical ribs 25 and the like are omitted, the root reinforcement with a slight protrusion length from the short-side base plate 21 that connects the root of the engaging protrusion 26 and the short-side vertical rib 25 is omitted. Ribs 55 are provided (the main engagement protrusion 52 is provided corresponding to the upper end and the lower end, and the sub-engagement protrusion 53 is provided only corresponding to the upper end) .

  As shown in FIGS. 4 and 7, when the folding side of the folding container 1, the short side wall portion 7 is placed on the lower side when it is placed on the upper side of the pair of short side wall portions 7. An engagement receiving portion 56 for receiving the main engagement protrusion 52 of the short side wall portion 7 is provided. That is, in the folded state of the folding container 1, the main engagement protrusion 52 of the lower short side wall 7 of the pair of short side walls 7 is the upper side of the lower short side wall 7. The main engagement protrusion 52 protrudes upward from the surface facing toward the upper side, but the main engagement protrusion 52 is provided on the surface facing toward the lower side of the short side wall portion 7 which is placed on the upper side. Is housed in. Thereby, the surface which faces the lower side among the short side wall portions 7 which are placed on the upper side, and the surface which faces the upper side among the lower side wall portions 7 on the lower side and a plurality of locations (by the surface). It is possible to abut. The engagement accommodating portion 56 of the present embodiment forms an opening at a corresponding portion of the short side base plate 21 and protrudes outward along the upper edge portion and the lower edge portion of the opening portion. A rib is provided, and the horizontal rib is connected to a short-side vertical rib 25 extending along a side edge of the short-side side wall portion 7 in the horizontal width direction of the opening, and the opening By opening a pair of upper and lower horizontal ribs that surround the wall and a wall portion that closes the tip edge of the short-side vertical rib 25, the short-side side wall portion 7 is opened to the side and outward. Is provided.

  As shown in FIGS. 5 and 7, the pair of upper and lower second engaging protrusions 54 have the same shape as each other, and are outside the outer surface of the short side wall portion 7 in the same manner as the main engaging protrusion 52. It protrudes toward. However, since the second engaging protrusion 54 is provided at a position out of the overlapping portion 7a in the short side wall portion 7, when the pair of short side wall portions 7 are overlapped as a sleeping position, The second engaging protrusions 54 of the lower short side wall 7 do not interfere with the upper short side wall 7. Further, the second engagement protrusion 54 is configured to have a lateral width smaller than that of the main engagement protrusion 52 (similar to the lateral width of the sub-engagement protrusion 53), and the protrusion length from the short side base plate 21 is the main engagement. It is about the same as the protrusion 52. Further, the engaging protrusion 26 has a chamfered boundary between the surface on the front end side in the protruding direction and the surface on the side in the lateral width direction of the short side wall 7. Compared with the sub-engagement protrusion 53 and the second engagement protrusion 54, the chamfered shape is made smaller.

  Further, as shown in FIGS. 7, 8, and 10, the long side wall 6 is a short position positioned on the upper side of the pair of short side walls 7 in the folded state of the folding container 1. An allowance portion 57 that accommodates the main engagement protrusion 52 of the side wall portion 7 is provided. That is, in the folded state of the folding container 1, the main engagement protrusion 52 of the upper short side wall 7 of the pair of short side walls 7 faces the upper side of the upper short side wall 7. Projects upward from the surface. Furthermore, when the long side wall portion 6 is set to the laying position, the long side hinge portion 14 (hinge body 14a) provided in the vicinity of the central portion in the width direction of the long side wall portion 6 is on the upper short side. It is comprised so that it may overlap above the main engaging protrusion 52 of the side wall part 7. FIG. In the present embodiment, the long-side hinge portion 14 is provided with a concave allowance portion 57 that opens downward when the long-side side wall portion 6 is in the laying position.

  Then, as shown in FIG. 10, the main engagement protrusion 52 of the short side wall portion 7 that is positioned on the upper side is the long side that is positioned on the lower side of the pair of long side wall portions 6. It is accommodated in an allowance portion 57 provided on the surface facing the lower side of the side wall portion 6. For this reason, it is possible to make the surface facing the lower side of the upper short-side side wall portion 7 abut on the surface facing the upper side of the upper short-side side wall portion 7 at a plurality of locations (by a surface). It becomes.

  As described above, when the folding container 1 is folded, either of the pair of short side wall portions 7 may be set as the upper side, and which of the pair of long side wall portions 6 is set as the upper side. It is configured to be better. For this reason, the engagement accommodating part 56 is provided in both of a pair of short side wall part 7, and each long side wall part 6 is provided in which engagement protrusion 26 of a pair of short side wall part 7. Correspondingly, an engagement accommodating portion 56 is provided. In addition, as shown in FIG. 7 and the like, the second engagement protrusion 54 is arranged so as not to overlap vertically with the long side wall 6 including the long side hinge 14 in the folded state of the folding container 1. ing. For this reason, in this example, in the folded state of the folding container 1 with respect to the long side wall 6, a permission portion for accommodating the second engagement protrusion 54 is not provided. In the case where the projection 54 is arranged so as to overlap the long side hinge portion 14 in the vertical direction, an allowance portion corresponding to the second engagement projection 54 is provided (or the second engagement projection 54 is provided on the short side wall portion). 7 so as not to protrude outwardly from the outer surface of 7).

  Further, as shown in FIG. 2 and the like, the engaging wall accommodating portion 58 as a concave supporting protrusion accommodating portion that opens outward and laterally is formed on both side portions on the outer surface side of the long side wall portion 6. Is provided. In the folded state of the folding container 1, the long side of the pair of long-side side wall portions 6 that is placed on the upper side in the engagement receiving portion 56 of the long-side side wall portion 6 that is placed on the lower side. The engaging wall 15 of the side wall part 6 is accommodated. In particular, in the present embodiment, in the folded state of the folding container 1, the pair of long side wall portions 6 overlap most of the upper engagement wall 15a and the intermediate engagement wall 15b. For this reason, in the height direction of the long side wall 6, the position between the upper engagement wall 15 a and the intermediate engagement wall 15 b and between the intermediate engagement wall 15 b and the long side lower rib 13. When the folding container 1 is in the folded state with respect to the position, the upper engagement wall 15a of the upper long side wall 6 and the middle An engagement wall accommodating portion 58 that accommodates each of the engagement walls 15b is provided. Accordingly, as shown in FIG. 10, in the folded state of the folding container 1, the surface facing the upper side of the long-side side wall portion 6 that is positioned at the lower side and the sleeping position at the upper side. The surface which faces the lower side of the long side wall portion 6 comes into contact with a plurality of locations (by a surface). In addition, the protrusion length from the long side base board 11 of the engagement wall 15 of this embodiment is comprised longer than the thickness of the short side wall part 7. FIG.

  Furthermore, as shown in FIG. 2 etc., it opens to the short side base part 5 upwards and outwards, and in the folded state of the folding container 1, on the lower side of the pair of long side wall parts 6. An engagement wall allowance portion 59 is provided as a support protrusion allowance portion that accommodates the engagement wall 15 of the long side wall portion 6 in the laying position. Thereby, in the folded state of the folding container 1, the surface which faces the upper side of the short side wall part 7 made into the upper position among a pair of short side wall parts 7, and a pair of long side wall Of the portion 6, the surface facing the lower side of the long side wall portion 6 that is positioned at the lower side is close (closer than the protruding length of the engaging wall 15 from the long side base plate 11. Distance).

  As described above, when the folding container 1 is in the folded state, the pair of long side wall portions 6 are stacked one above the other, regardless of which of the pair of long side wall portions 6 is laid down first. Thus, the folding container 1 can be folded. For this reason, the engagement wall accommodating portion 58 is provided on either of the pair of long side wall portions 6 and the engagement wall 15 of the pair of long side wall portions 6 is provided on the short side base portion 5. Corresponding to this, an engagement wall allowing portion 59 is provided.

  As shown in FIGS. 7 and 9, the short side wall portion 7 of the present embodiment has a shape in which a portion in a range including the central portion in the height direction is slightly curved outward. With this configuration, when a load is applied to the short side wall 7 from above in the assembled state of the folding container 1, the short side wall 7 is not easily deformed inward of the folding container 1. Accordingly, adverse effects on the articles accommodated in the folding container 1 due to the deformation of the short side wall portion 7 are suppressed. Of the short side wall 7, in the height direction of the short side wall 7, the upper portion of the upper side including the overlapping portion 7 a and the lower side of about 1/3. The part is not curved, and the corresponding long side base plate 11 is flat. Further, the short side wall 7 of the present embodiment has substantially the same thickness at any part in the height direction of the short side wall 7.

  Further, as shown in FIG. 1 and the like, the intermediate engagement wall 15b is in contact with or close to the outer surface side of the intermediate position in the height direction that is curved outward of the short side wall portion 7. It is configured. Therefore, in the assembled state of the folding container 1, when a load is applied to the short side wall 7 from above, the outward deformation of the short side wall 7 is effectively suppressed.

  In addition, as shown in FIG. 9 and the like, the inner side of the long side wall 6 protrudes inward from the long side base plate 11, and in the assembled state of the folding container 1, the short side wall 7. A deformation preventing protrusion 60 is provided in the vicinity of the inner surface. The deformation preventing projection 60 is provided corresponding to the vicinity of the upper end portion of the curved portion of the short side wall 7 and the vicinity of the lower end portion of the curved portion. Furthermore, the protrusion length of the deformation preventing protrusion 60 is configured to be short enough not to hinder the rotational displacement of the short side wall 7. Further, when a load is applied to the long side wall 6 from above, the long side base 4 is easily deformed by falling slightly outward, and the long side base 4 is outward. When the lower position of the long side base plate 11 is no longer supported among the lower sides of the long side wall 6, the long side wall 6 is curved inwardly. It may be deformed. Thus, the long side wall 6 is deformed inward, so that the inner surface of the long side wall 6 (particularly, near the center in the height direction) is the side of the short side wall 7. The deformation preventing projection 60 is brought close to the short side wall portion 7. Thereby, even if the protrusion length of the deformation prevention protrusion 60 is short, the inward displacement or deformation of the short side wall 7 can be prevented by the deformation prevention protrusion 60.

  As described in detail above, according to the present embodiment, the main engagement protrusion 52 disposed on the uppermost side of the engagement protrusions 26 provided on the outer surface side of the short side wall portion 7 has the short side. Protruding outward from the outer surface of the side wall 7 and provided in the overlapping portion 7a of the short side wall 7 where the short side wall 7 overlaps in the folded state of the folding container 1. Yes. Furthermore, the short side wall portion 7 is provided with an engagement accommodating portion 56, and the lower short side wall of the pair of short side wall portions 7 that are placed in the sleeping position in the folded state of the folding container 1. The engagement protrusion 26 of the portion 7 is accommodated in the engagement accommodating portion 56 of the upper short side wall portion 7. For this reason, even if it is the structure where the main engagement protrusion 52 which protrudes outward rather than the outer surface of the short side wall part 7 is provided in the overlap part 7a of the short side wall part 7, in the folded state of the folding container 1 The interference between the main engagement protrusion 52 of the lower short side wall 7 and the surface facing the lower side of the upper short side wall 7 can be avoided, and a pair of overlapping short sides The side walls 7 can be brought into contact with each other vertically so that the height position of the upper short side wall 7 can be positioned as low as possible. As a result, the height of the folded container 1 in the folded state, and hence the height when the folded folded containers 1 are stacked, can be reduced as much as possible, and the transport and storage efficiency of the folded container 1 in the folded state can be improved. Improvements can be made.

  Further, in the folded state of the folding container 1, of the pair of short side wall portions 7 set in the laying position, the upper short side wall portion 7 is the engagement protrusion 26 of the lower short side wall portion 7. It is possible to avoid the situation that it is supported by only. Therefore, in the folded state of the folding container 1, the engagement protrusion 26 of the lower short side wall 7 and the engagement protrusion 26 of the lower short side wall 7 of the upper short side wall 7 are arranged. It is possible to prevent a portion facing vertically from being deformed or damaged.

  Moreover, since the main engagement protrusion 52 can protrude outward rather than the outer surface of the short side wall part 7, the protrusion length can fully be ensured. Therefore, the engagement state between the main engagement protrusion 52 and the engagement hole portion 16 can be made stronger, and as a result, the shape of the folding container 1 in the assembled state can be stabilized. . In particular, in this embodiment, since the thickness of the short side wall portion 7 including the overlapping portion 7 a is relatively thin as a whole, the main engagement protrusion 52 is disposed outside the outer surface of the short side wall portion 7. If it does not protrude in the direction, the desired protrusion length of the main engagement protrusion 52 cannot be secured. In this regard, as described above, the short side wall portion 7 is provided with the engagement accommodating portion 56 that can avoid interference with the main engagement projection 52, so that the main engagement projection 52 can be used without any trouble. 7 can be protruded outward from the outer surface, and the effect of improving the transportation and storage efficiency of the folded container 1 in the folded state is more effectively achieved.

  Further, only the main engagement protrusion 52 is provided as an engagement protrusion 26 to be engaged with the engagement hole 16 of the upper engagement wall 15a of the long side wall part 6 on the overlapping part 7a of the short side wall part 7. Instead, a sub-engagement protrusion 53 is provided that is within the thickness range of the short side wall 7 (not protruding outward from the outer surface of the short side wall 7). For this reason, the burden of the main engagement protrusion 52 in the assembly state of the folding container 1 can be reduced, without increasing the number of the engagement accommodating parts 56, or the formation range. Further, the main engagement protrusion 52 is configured to have a greater width than the sub-engagement protrusion 53. For this reason, the strength of the main engagement protrusion 52 is increased, and deformation and damage of the main engagement protrusion 52 can be prevented. Accordingly, it is possible to further stabilize the engagement state between the main engagement protrusion 52 and the engagement hole portion 16.

  In addition, the main engagement protrusion 52 is provided above the other engagement protrusions 26 (sub-engagement protrusions 53). In other words, the engagement protrusion 26 closest to the upper side portion, which is the portion of the short side wall portion 7 that is the largest relative displacement with respect to the long side wall portion 6, is used as the main engagement protrusion 52. The effect of stabilizing the engagement state between the protrusion 26 and the engagement hole 16 is more effectively achieved. Furthermore, for example, in the assembled state of the folding container 1, when a force that causes the long side wall portion 6 in the standing position to be displaced outwards is generated, the uppermost member on which a relatively large force is likely to act. By making the joint protrusion 26 the main engagement protrusion 52 and increasing the lateral width, deformation and breakage of the engagement protrusion 26 can be effectively suppressed.

  In addition, each long side wall 6 has the main engagement protrusion 52 of the short side wall 7 that is placed on the upper side of the pair of short side walls 7 in the folded state of the folding container 1. An allowance portion 57 for accommodating is provided. For this reason, in the folded state of the folding container 1, of the pair of short side wall portions 7 that are in the laying position, the engagement protrusions 26 of the upper short side wall portion 7 are the pair of long lengths that are in the laying position. Among the side wall portions 6, the side wall portions 6 are accommodated in the allowance portions 57 of the lower long side wall portions 6. For this reason, in the folded state of the folding container 1, interference between the main engagement protrusion 52 of the upper short side wall 7 and the surface facing the lower side of the lower long side wall 6 is avoided. The upper side wall portion 7 on the upper side and the side wall portion 6 on the lower side on the lower side are brought into contact with each other vertically so that the height position of the side wall portion 6 on the long side is positioned as low as possible. it can. As a result, the effect of improving the transportation and storage efficiency of the folding container 1 in the folded state is further exhibited. Furthermore, in the folded state of the folding container 1, it is possible to avoid a situation in which the lower long side wall 6 is supported only by the engaging protrusions 26 of the upper short side wall 7. Therefore, in the folded state of the folding container 1, the engagement protrusion 26 of the upper short side wall portion 7 and the engagement protrusion 26 of the upper short side wall portion 7 of the long side wall portion 6 are vertically opposed. It is possible to prevent deformation and damage of the part to be performed.

  In addition, when the folding side of the folding container 1 is the long-side side wall 6, the long-side side wall 6 is engaged with the upper-side long-side side wall 6 when the pair of long-side side-walls 6 is placed at the lower position. An engagement wall housing portion 58 for housing the mating wall 15 is provided. For this reason, in the folded state of the folding container 1, the pair of overlapping long side wall portions 6 are brought into contact with each other in the vertical direction, and the height position of the long side wall portion 6 placed on the upper side and thus folded. The height of the folding container 1 in a state can be made as low as possible. Therefore, in the folded state of the folding container 1, as described above, coupled with the configuration in which the height of the pair of overlapping short side walls 7 is made as low as possible, the height of the folding container 1 in the folded state is made lower. Can be suppressed.

  Furthermore, the short side base part 5 accommodates the engaging wall 15 of the long side wall 6 that is placed in the lower position of the pair of long side walls 6 in the folded state of the folding container 1. An engaging wall allowing portion 59 is provided. For this reason, in the folded state of the folding container 1, the upper short side wall portion 7 and the lower long side wall portion 6 are brought into contact with each other in the vertical direction, and the long side located at the lower position The height position of the side wall part 6 and by extension, the height of the folded folding container 1 can be made as low as possible.

  In addition, regardless of which of the pair of short side wall portions 7 is the sleeping position first, the pair of short side wall portions 7 can be folded up and down in a folded state. Furthermore, it is comprised so that a pair of long side wall part 6 may be piled up and down and it can be made into a folded state regardless of which one of the pair of long side wall parts 6 is a sleeping position first. For this reason, the workability | operativity at the time of making the folding container 1 into a folded state can be aimed at.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the above-described embodiment, the engaging wall 15 is provided with the engaging hole portion 16 penetrating in the thickness direction of the engaging wall 15 as the engaged portion to be engaged with the engaging protrusion 26. However, the engaged portion may be configured by a concave portion that does not penetrate in the thickness direction of the engagement wall 15 and opens to the lateral side central portion side of the long side wall portion 6. Further, the number and arrangement of the engagement walls 15 and the engagement protrusions 26 are not particularly limited, and can be changed as appropriate. For example, in each side part of the short side wall part 7, one engagement wall 15 may be provided, or three or more engagement walls 15 may be provided, and the engagement hole part 16 may be provided in one engagement wall 15. One or three or more may be provided.

  Moreover, in the said embodiment, among the 1st engagement protrusions 51 provided up and down, the upper side is comprised as the main engagement protrusion 52, and the lower side is comprised as the sub-engagement protrusion 53, but upper side is comprised. The sub-engagement protrusion 53 may be used, and the lower side may be the main engagement protrusion 52. Further, the sub-engagement protrusion 53 may be omitted, or both of the first engagement protrusions 51 may be used as the main engagement protrusion 52. However, in the assembled state of the folding container 1, in order to effectively prevent the relative displacement between the long side wall portion 6 and the short side wall portion 7, Among the plurality of engaging protrusions 26 provided along the upper side, the uppermost engaging protrusion 26 is used as a main engaging protrusion 52, and further, the burden on the main engaging protrusion 52 is reduced. It is desirable to provide the sub-engagement protrusion 53 in the overlapping portion 7a.

  (B) In the said embodiment, although the thickness of the short side wall part 7 is entirely comprised rather than the thickness of the long side wall part 6, the overlapping part 7a is comprised among the short side wall parts 7, for example. May be configured to be thinner than other portions of the short side wall 7 and thinner than the long side wall 6 (the short side hinge portion 24 may be It is also possible to exclude the other part of the short side wall portion 7). Moreover, it is also possible to embody the folding container in which the thickness of the short side wall portion is substantially the same as the thickness of the long side wall portion. Furthermore, although the range including the center part in the height direction is curved outward, the short side wall 7 of the above embodiment may be configured not to be curved.

  In addition, the shaft protruding portion 24 of the short side hinge portion 24 of the short side wall portion 7 of the above embodiment has a short side bearing portion in a state in which the short side wall portion 7 is displaced from the standing position to the sleeping position. 9 is configured to be slidable up and down as long as it does not come out of the range 9, but may be configured not to slide. Furthermore, in the said embodiment, when the short side wall part 7 is made into the laying position, the short side wall part 7 used as the lower side is comprised so that it may contact | abut on the upper surface of the bottom wall part 3. However, for example, the lower end side wall portion 9 is located at the lower end of the short side bearing portion 9 at a predetermined distance from the upper surface of the bottom wall portion 3 and is the lower side in the folded state of the folding container 1. 7 may be set to the laying position in a posture inclined downward from the short side base portion 5 toward the inside.

  (C) In the above embodiment, the flap 31 is pivotally connected to the upper side of the long side wall 6, but it may be embodied in the folding container 1 in which the flap 31 is not provided. Is possible. Further, when the flap 31 is omitted, the inclining displacement to the inside of the short side wall 7 at the standing position may be restricted only by the elastic locking piece 17, or the elastic locking piece 17. Instead of this, on the outer surface side of the short side wall portion 7, a connecting means for connecting the long side wall portion 6 in the standing position and the short side wall portion 7 in the standing position is mounted. It is good as well.

  In addition, since the short side wall part 7 (and long side wall part 6) of the said embodiment is comprised thinly, it installs a connection means (it seems to have an operation part which an operator operates). It is difficult to fit a simple connecting means within the thickness range of the short side wall 7. That is, when the connecting means is provided, in the assembled state of the folding container 1, the relative displacement in the vertical direction between the long side wall portion 6 and the short side wall portion 7 is changed to the engagement protrusion 26 and the connecting means. Can cooperate and regulate. On the other hand, when the connecting means is not provided, the relative displacement must be restricted only by the engagement protrusion 26. At this time, if the engagement protrusion 26 is small, there is a concern that it is difficult to regulate the relative displacement. In this regard, as in the above-described embodiment, the main engagement protrusion 52 is configured to be relatively large so as to protrude outward from the outer surface of the short side wall 7, thereby eliminating such a concern. It is possible to stabilize the assembly state of the folding container 1.

  (D) Moreover, the arrangement | positioning and direction of the elastic locking piece 17 are not specifically limited. For example, in the above embodiment, the elastic piece 17a of the elastic locking piece 17 is configured such that the upper end portion is connected to the long side base plate 11, but the lateral width of the short side wall portion 7 of the elastic piece. It is good also as a structure by which the edge part by the side of a direction center part or a lower end part is connected with the long side base board 11. FIG. In addition, the elastic locking piece 17 can be omitted.

  Note that the elastic locking piece 17 of the above-described embodiment is a temporary interval from when the pair of short side wall portions 7 are in the standing position to when the flap 31 is lowered to the lock position when the folding container 1 is in the assembled state. It is provided in the role of stopping. For this reason, although not specifically mentioned in the above embodiment, the surface of the locking projection 17b on the side of the short side wall 7 (prevents unintentional tilt displacement inward of the short side wall 7 in the upright position). (Surface to be performed) is also slightly inclined inward of the folding container 1 toward the lateral side central portion of the short side wall 7. Thus, when the folding container 1 is in the folded state, the elastic locking piece 17 is directly moved by hand by applying a certain amount of force to the short side wall portion 7 in the standing position and displacing it to the sleeping position side. Even if it does not operate, the short side wall part 7 can be displaced to the laying position. Furthermore, by extending the elastic piece 17a in the height direction of the long side wall portion 6, the width of the elastic locking piece 17 in the lateral width direction of the long side wall portion 6 is made relatively short. The plurality of long-side vertical ribs 18 provided in the vicinity of both side portions on the outer surface side of the long-side side wall portion 6 can be more densely arranged.

  (E) In the said embodiment, when the folding container 1 is made into the folded state in the long side hinge part 14 of the long side wall part 6, it is set as a sleeping position on the upper side among a pair of short side wall part 7. In the folded state of the folding container 1, the upper short side wall 7 and the lower long side are provided. In the case where the side wall 6 is partially separated and the main engagement protrusion 52 of the upper short side wall does not interfere with the lower long side wall 6, the allowance 57 is omitted. It is also possible to do. For example, the engagement protrusions 26 (the main engagement protrusion 52 and the second engagement protrusion 54) that protrude outward from the outer surface of the short side wall portion 7 of the engagement protrusions 26 are the folding container 1. In the folded state, the long side wall portion 6 (long side hinge portion 14) does not overlap vertically. Even if the allowance portion 57 is not provided, the folding container 1 is folded in the upper short side. Interference between the main engagement protrusion 52 of the side wall portion 7 and the lower long side wall portion 6 (long side hinge portion 14) is avoided, and the upper surface of the upper short side wall portion 7 and the lower side The long side wall 6 on the side can be brought close to or in contact with the lower surface of the side wall 6.

  Of course, as a result of providing the long side hinge part 14 and the engagement protrusion 26 at suitable positions, the engagement projecting outward from the outer surface of the short side wall part 7 in the folded state of the folding container 1. In the case where the projection 26 and the long side hinge portion 14 are vertically overlapped, it is desirable to provide the allowance portion 57 at a corresponding portion of the long side hinge portion 14. In this case, interference between the main engagement protrusion 52 of the upper short side wall portion 7 and the lower long side wall portion 6 (long side hinge portion 14) can be avoided, and the upper short side wall portion can be avoided. 7 and the lower surface of the lower long side wall 6 can be brought close to or in contact with each other, and the height of the folded folding container 1 can be kept as low as possible.

  In the above-described embodiment, in the folded state of the folding container 1, the pair of short side wall portions 7 are in a state where the pair of short side wall portions 7 are in contact with each other vertically, Of the pair of long side wall portions 6, the long side wall portion 6 positioned at the lower position is placed close to each other, and the pair of long side wall portions 6 are vertically arranged at a plurality of locations (surfaces). However, the present invention is not limited to such a configuration, and an engagement housing portion 56, a permission portion 57, an engagement wall housing portion 58, and an engagement wall permission portion 59 are provided. Therefore, compared with the case where these are not provided, in the folded state of the folding container 1, the distance between the pair of short side wall portions 7 becomes closer, and the short side wall portion 7 which is set to the sleeping position on the upper side. And the long side wall part 6 which is the laying position on the lower side of the pair of long side wall parts 6 Distance is close, it is sufficient that as the distance between the pair of long side side wall portion 6 to each other closer. For example, the short-side side wall portion 7 that is placed on the upper side and the long-side side wall portion 6 that is placed on the lower side of the pair of long-side side wall portions 6 abut on each other at multiple locations (surfaces). Or contact at a plurality of locations, and the remaining locations are close to each other).

  (F) In the said embodiment, when the long side base part 4 is comprised higher than the short side base part 5, and the folding container 1 is made into an assembly state from a folded state, a pair of long side side wall part 6 is made. The short side wall portion 7 is configured to be in the upright position after being set in the upright position first, but the short side base portion is configured to be higher than the long side base portion, and the folding container is in an assembled state. When doing, it is good also as a structure which makes a long side wall part a standing position after making a pair of short side wall part a standing position first. When this configuration is employed, an engagement wall is provided on the short side wall and an engagement protrusion is provided on the long side wall. In addition, when the configuration is adopted, in the folded state of the folding container, the pair of long side wall portions overlaps each other in the vertical direction, while the pair of short side wall portions that are placed in the sleeping position above the long side wall portion With respect to the portions, the height positions of the pair of short side wall portions that are the sleeping positions may be the same without overlapping.

  (G) Although the folding container 1 in the said embodiment is comprised with the polypropylene, it is good also as comprising with other resin materials, such as polyethylene, PET, and polyamide.

  DESCRIPTION OF SYMBOLS 1 ... Folding container, 2 ... Bottom wall structure part, 3 ... Bottom wall part, 4 ... Long side side base part, 5 ... Short side side base part, 6 ... Long side side wall part, 7 ... Short side wall part, 7 ... an overlapping part, 8 ... a long side bearing part, 9 ... a short side bearing part, 15 ... an engagement wall, 16 ... an engagement hole part, 26 ... an engagement protrusion, 51 ... a first engagement protrusion, 52 ... Main engagement protrusion, 53... Sub-engagement protrusion, 54... Second engagement protrusion, 56... Engagement accommodating portion, 57.

Claims (3)

A bottom wall portion having a substantially rectangular shape in plan view, and a bottom wall constituting portion including a base portion provided on the upper surface side of the bottom wall portion along each side portion of the bottom wall portion;
Connected to each base portion of the bottom wall constituting portion so as to be rotatable and displaceable between a standing position standing above each base portion and a laying position lying above the bottom wall portion. A side wall portion,
In a folding container that can change state between an assembled state in which all the side wall portions are in the standing position and a folded state in which all the side wall portions are in the laying position,
The base portion includes a pair of first base portions that protrude upward from a pair of opposite side portions of the bottom wall portion, and a bottom wall portion between both ends of the pair of first base portions. A pair of opposing second base parts provided along the side sides of the
The side wall portion includes a pair of first side wall portions respectively connected to the first base portions, and a pair of second side wall portions respectively connected to the second base portions.
When the folded state is set to the assembled state, the second side wall portion can be set to the standing position by setting the pair of first side wall portions to the standing position.
In the folded state, the second side wall portions that are in the laying position overlap each other vertically,
Support protrusions protruding from the inner surface of the first side wall are provided on both sides of the first side wall,
On the outer surface side of the second side wall portion, there is provided an engagement protrusion that protrudes outward and is engaged with the engaged portion of the support protrusion in the assembled state.
The engagement protrusion is provided in an overlapping portion which is a portion where at least the second side wall portion overlaps in the folded state in the second side wall portion,
At least one of the engaging protrusions provided in the overlapping part is configured as a main engaging protrusion protruding outward from an outer surface of the overlapping part of the second side wall part,
In the folded state, the second side wall portion accommodates the main engagement protrusion of the second side wall portion on the lower side when the second side wall portion is in the laying position on the upper side of the pair of second side wall portions. A collapsible container characterized in that it comprises a joint housing part. The overlapping portion is provided with a plurality of engaging projections corresponding to each side portion of the second side wall portion,
As the engagement protrusions provided corresponding to the respective side portions of the second side wall portion in the overlapping portion, the main engagement protrusion and the sub-engagement protrusion that falls within the thickness range of the second side wall portion. Provided,
The folding container according to claim 1, wherein the main engagement protrusion is configured to have a width in the width direction of the second side wall portion larger than that of the sub-engagement protrusion.   In the folded state, the first side wall portion includes an allowance portion that accommodates the main engagement protrusion of the second side wall portion that is set as the sleeping position on the upper side of the pair of second side wall portions. The folding container according to claim 1 or 2, characterized in that.

Images