JP4934539B2 - Folding container - Google Patents

Description

  The present invention relates to a foldable folding container that includes a bottom portion and a side wall hinged to the bottom portion.

  Conventionally, as an example, a folding method in which a long side wall is hinged to an opposing long side bank portion having a low bottom and a short side wall is hinged to an opposing short side bank having a high bottom. To fold a container that is known and has a box shape, first fold down the long side wall so that it overlaps the bottom, and then put the short side wall on top of the long side wall that overlaps the bottom It is constructed so that it can be folded into a compact state with a low height, and the substantially horizontal short side wall of the folded container in the folded state is set up substantially vertically, The long side wall in a substantially horizontal state is configured to be in a box shape by standing substantially vertically.

  By the way, in the folding container configured such that the front end portions of the opposite side walls overlap each other when folded, the thickness of the front end portions that overlap each other is reduced, and the height of the opposite side walls that overlap each other is folded. As an example, Patent Document 1 discloses a folding container in which the height of the folding container in the folded state is lowered by reducing the height of the folding container to improve the accommodation efficiency of the folded container in the folded state. ing.

JP 2001-315773 A

  In the conventional folding container described above, the top end of the folding container assembled in a box shape is reduced when it is assembled into a box shape by reducing the thickness of the tip of the opposite side wall when folded. There was a problem that the strength and rigidity of the portion were lowered, and as a result, the strength and rigidity of the folding container assembled in a box shape became insufficient.

  In recent years, attempts have been made to make the side walls as thin as possible in order to reduce the weight of the folding container and increase the accommodation efficiency during folding. The problem is remarkable.

  An object of the present invention is to solve the problems of the above-described conventional folding container.

The present invention, in order to achieve the object described above, the opposed side walls being defeated from box-state first, the folding container and a opposed side walls which are brought down after the box-type state, first from the box-like state By forming ribs higher than the ribs formed on the outer wall surface of the side wall on the upper side of the outer wall surface of the opposite side wall to be collapsed and on the upper side of the opposite side wall to be tilted later from the box type state, An upper belt-like protrusion parallel to the rib is formed, and a laterally long horizontal belt-like recess is formed on the inner surface of the opposite side wall to be tilted later. The upper belt-like protrusion formed on the side wall that is tilted down is inserted into the horizontal band-shaped recess formed on the side wall that is tilted later .

  Since this invention has the structure mentioned above, there can exist the effect described below.

  Since the upper band-shaped protrusions are formed on the upper part of the outer wall surface of the side wall that is tilted first from the box-type state and the upper part of the opposite side wall that is tilted later from the box-type state, respectively, the strength and rigidity of the side wall, Since the strength and rigidity of the upper part can be increased, it is possible to prevent the folding container assembled in a box shape from being deformed or damaged, and to prevent the side walls from being disengaged. it can.

  At least the upper portions of the opposite side walls that are tilted later from the box type state are configured to overlap each other, and the opposite side walls that are tilted later from the box type state to the inner surfaces of the opposite side walls that are tilted later from the box type state Since the upper belt-like protrusion formed on the upper portion forms a horizontal belt-like recess that can be inserted, it is possible to reduce the height of the folded folding container, and therefore accommodate the folded folding container. Efficiency can be increased.

  The bottom fitting member is formed with a band-shaped recess that can be inserted into the upper band-shaped protrusion formed at the top of the side wall located on the upper side wall of the opposite side wall that is tilted later from the box shape. When the folding containers are stacked, the mating member formed on the bottom back of the folded container in the upper position is placed on the top of the folded container in the lower position. The folded container in the folded state, which is in contact with the upper band-shaped protrusion formed on the side wall located on the upper side, does not float up, so the folded container in the folded state has a higher stacking height. Therefore, the accommodation efficiency of the folded container in the folded state can be increased.

  Hereinafter, examples of the present invention will be described. However, the present invention is not limited to these examples as long as the gist of the present invention is not exceeded.

  First, the overall configuration of the folding container of the present invention will be described with reference to FIGS.

  Reference numeral 1 denotes a bottom portion having a substantially rectangular planar shape, and the bottom portion 1 is formed on a bank portion 1a formed on the opposite long side (hereinafter, referred to as a long side bank portion) 1a and on the opposite short side. And the height of the long side bank portion 1a is higher than the height of the short side bank portion 1b.

  Reference numeral 2 denotes a long side wall, and the long side wall 2 is hinged to the long side bank portion 1 a of the bottom portion 1. Reference numeral 3 denotes a short side wall, and the short side wall 3 is hinged to the short side wall bank portion 1 b of the bottom portion 1.

  A vertically long engagement frame 4 extending in a direction substantially perpendicular to the plate-like part 2 a is formed at both ends of the horizontally long and substantially rectangular plate-like part 2 a of the long side wall 2. Are provided with an appropriate number of fitting through holes 4a. In addition, by forming a U-shaped slit 5 in the plate-like portion 2a located in the vicinity of the engagement frame 4, an elastic tongue piece 6 having the engagement frame 4 side formed at the free end is formed, A locking projection 6 a is formed at the tip of the elastic tongue piece 6 so as to face the engagement frame 4.

  In addition, a vertically long engagement frame 7 is formed by extending the plate-like part 3 a at both ends of the substantially square plate-like part 3 a of the short side wall 3, and the engagement frame 7 is folded. When the container is assembled into a box shape, an appropriate number of fitting protrusions 7a that can be fitted into fitting through holes 4a formed in the engagement frame 4 of the long side wall 2 are provided.

  As shown in FIG. 3, in order to assemble from the folded state into the box-type state as shown in FIG. 1, first, the long side wall 2 in the substantially horizontal state is first made to be substantially vertical. When the short side wall 3 is turned upright, and then the vertical side wall 3 is rotated in the vertical direction, the fitting projectingly provided on the engaging frame 7 of the short side wall 3 to the fitting through hole 4 a formed in the engaging frame 4 of the long side wall 2. Before and after the mating protrusion 7a is fitted, the engaging frame 7 of the short side wall 3 comes into contact with the locking convex portion 6a of the elastic tongue piece 6 formed on the long side wall 2, and the elastic tongue piece 6 is deformed outward. Let Then, when the engagement frame 7 of the short side wall 3 passes through the locking projection 6 a of the elastic tongue piece 6 formed on the long side wall 2, it was pushed outward by the engagement frame 7 of the short side wall 3. The elastic tongue 6 returns due to its restoring force, and the locking convex portion 6a of the elastic tongue 6 abuts on the engagement frame 7 of the short side wall 3 standing substantially vertically, and the bottom side 1 direction of the short side wall 3 is reached. It is comprised so that rotation to may be prevented.

  In order to fold the box-shaped folding container, first, the elastic tongue piece 6 of the long side wall 2 is first placed on the outside so that the engaging projection 6a is disengaged from the engaging frame 7 of the short side wall 3. Then, the fitting projection 7a formed on the engaging frame 7 of the short side wall 3 is formed in the engaging frame 4 of the long side wall 2 by rotating the short side wall 3 toward the bottom 1 direction. The short side wall 3 is lowered onto the bottom 1 by discharging from the through hole 4a. Thereafter, the folding container assembled in a box shape is folded by tilting the substantially vertical long side wall 2 toward the bottom 1.

  In the present embodiment, in the folded state, the short side walls 3 that are initially tilted in the bottom direction are configured so as not to overlap each other, and the long side wall 2 that is tilted later has an upper portion thereof. Are configured to overlap each other.

  Next, a more specific configuration of the long side wall 2 will be described with reference to FIGS. 1, 2, and 4 to 8.

  The upper edge of the plate-like portion 2a of the long side wall 2 extends substantially horizontally outward from the outer surface 2a1 of the plate-like portion 2a (the surface located outside when the folding container is assembled into a box shape). The upper end horizontal rib 2b is formed, and the lower end horizontal rib 2c is similarly formed on the lower end edge of the plate-like portion 2a. Further, the vertical edges at both ends of the plate-like portion 2a are formed into plate-like shapes. A vertical end rib 2d extending outward from the outer surface 2a1 of the portion 2a is formed.

  Further, one or more appropriate number of end-side vertical ribs 2e are formed on the outer surface 2a1 of the plate-like portion 2a located near the vertical end rib 2d. In the present embodiment, an example is shown in which a total of six end-side vertical ribs 2e are formed, three for each vertical end rib 2d. Further, on the outer surface 2a1 of the plate-like portion 2a located immediately below the upper end horizontal rib 2b, opposite end-side vertical ribs 2e (hereinafter simply referred to as opposite end portions) located near the center of the plate-like portion 2a. One or two or more appropriate number of upper horizontal ribs 2f for connecting the vertical ribs 2e) are formed. In this embodiment, an example in which two upper horizontal ribs 2f are formed is shown.

  On the outer surface 2a1 of the plate-like portion 2a, vertical ribs 2g and horizontal ribs 2h can be formed as necessary in addition to the above-described end side vertical ribs 2e and upper horizontal ribs 2f.

  In the long side wall 2 having the above-described configuration, the height of the upper end horizontal rib portion 2b ′ of the upper end horizontal rib 2b located between the opposite end side vertical ribs 2e (the height from the outer surface 2a1 of the plate-like portion 2a). The same applies hereinafter), the height of the upper horizontal rib portion 2f ′ of the upper horizontal rib 2f located between the opposite end side vertical ribs 2e, and the upper horizontal rib 2b and a predetermined upper horizontal rib 2f (this embodiment) In the example, the heights of the end-side vertical rib portions 2e ′ of the opposite end-side vertical ribs 2e located between the uppermost horizontal rib 2f) positioned at the bottom are substantially the same height. And the heights of these rib portions 2b ', 2e', 2f 'are other ribs, that is, upper end horizontal rib portions 2b "and upper end horizontal ribs 2b that are not positioned between the opposite end side vertical ribs 2e. And the end that is not located between the upper horizontal rib 2f Vertical ribs portion 2e ", the lower end horizontal ribs 2c, vertical end ribs 2d, and is configured higher than the height of such vertical ribs 2g and horizontal rib 2h.

  The upper horizontal rib portion 2b 'located between the opposite end side vertical ribs 2e, the upper horizontal rib portion 2f' located between the opposite end side vertical ribs 2e, and the upper horizontal rib 2b and the upper horizontal rib. Other ribs other than the end-side vertical rib portion 2e 'positioned between the ribs 2f, that is, the upper-end horizontal rib portion 2b "not positioned between the opposite end-side vertical ribs 2e, the upper-end horizontal rib 2b and the upper horizontal The heights of the end-side vertical ribs 1e ", the lower horizontal ribs 2c, the vertical end ribs 2d, the vertical ribs 2g, and the horizontal ribs 2h that are not located between the ribs 2f are all the same height. Therefore, the imaginary surface formed by the tips of these ribs is configured as a flat surface. Hereinafter, the flush surface formed by such a flush virtual plane is referred to as an outer wall surface F1 of the long side wall 2.

  As described above, the height of the upper horizontal rib portion 2b ′ located between the opposite end side vertical ribs 2e, the height of the upper horizontal rib portion 2f ′ located between the opposite end side vertical ribs 2e, and By making the height of the end side vertical rib portion 2e 'located between the upper end horizontal rib 2b and the upper horizontal rib 2f higher than the height of the other ribs, An upper belt-like protrusion P1 extending outward from the outer wall surface F1 is formed.

  Even if an external force is applied to the upper part of the long side wall 2 of the folding container assembled in a box shape by forming the upper belt-like protrusion P1 as described above on the long side wall 2, the long side wall 2 is in the length direction. In simple terms, there is no bending deformation. For example, when an article is stored in a folding container assembled in a box shape, the article presses the upper part of the long side wall 2 from the inside, and the long side wall 2 is curved and deformed outward in the length direction. Thus, the engagement state between the engagement frame 7 of the short side wall 3 and the engagement frame 4 of the long side wall 2 may be released. However, in the present invention, the upper side wall-like protrusion P1 is formed on the long side wall 2. Since it is formed, such a curved deformation of the long side wall 2 can be prevented, and the strength and rigidity of the long side wall 2 can be increased. .

  On the inner surface 2a2 of the plate-like portion 2a of the long side wall 2 (the surface located on the inner side when the folding container is assembled in a box shape), the plate-like portion 2a bulges from the inner surface 2a2 side toward the outer surface 2a1. Thus, a horizontally long horizontal strip-shaped recess W1 is formed over substantially the entire width of the plate-like portion 2a. Thus, by forming the horizontal strip-shaped recess W1 on the inner surface 2a2 of the plate-shaped portion 2a of the long side wall 2, the strip-shaped bulging portion S1 is formed on the outer surface 2a1 of the long side wall 2.

  When folding a folding container assembled in a box shape, first, the one short side wall 3 of the opposing short side wall 3 is brought down so as to overlap the bottom portion 1, and then the other short side wall 3 is , So that it overlaps the bottom 1. Thereafter, one long side wall 2 of the opposing long side walls 2 is brought down so as to overlap the short side wall 3 superimposed on the bottom 1, and then, the other long side wall is placed on the upper side of the other long side wall first. Although it will fall down so that it may overlap with the upper part of one fallen long side wall 2, as shown in FIG. 7 or FIG. The upper belt-like projecting portion P1 projecting from is inserted into a horizontal belt-like concave portion W1 formed on the inner surface 2a2 of the plate-like portion 2a of the other long side wall 2 that is tilted later. 7 and 8, one long side wall 2 of the opposing long side wall 2 is first tilted, and then the other long side wall 2 is tilted, or the other long side wall 2 of the opposing long side wall 2 is tilted. It is a drawing that differs only in whether 2 is first defeated and then one long side wall 2 is defeated.

  As described above, the upper belt-like protrusion P1 is formed on the outer wall surface F1 of the long side wall 2 that is tilted in the direction of the bottom 1 next to the opposing short side wall 3, and the long side wall 2 is formed on the inner surface 2a2 of the long side wall 2. When the two are folded so that the upper portions thereof overlap each other, the horizontal belt-shaped recess W1 into which the upper belt-shaped protrusion P1 formed on the outer wall surface F1 of the long side wall 2 positioned below can be inserted is formed. The height of the overlapping portion of the two long side walls 2 whose upper portions are tilted so as to overlap each other can be lowered, and therefore the height of the folded container in the folded state can be lowered.

  Next, a more specific configuration of the short side wall 3 will be described with reference to FIGS. 9 and 10.

  The upper edge of the plate-like portion 3a of the short side wall 3 extends substantially horizontally from the outer surface 3a1 of the plate-like portion 3a (the surface located outside when the folding container is assembled into a box shape). The upper end horizontal rib 3b is formed, and the lower end horizontal rib 3c is similarly formed at the lower end edge of the plate-like portion 3a. Further, the vertical edges at both ends of the plate-like portion 3a are formed into plate-like shapes. A vertical end rib 3d extending outward from the outer surface 3a1 of the portion 3a is formed.

  Also, one or two or more appropriate number of end-side vertical ribs 3e are formed on the outer surface 3a1 of the plate-like portion 3a located in the vicinity of the vertical end rib 3d. In the present embodiment, an example is shown in which two end-side vertical ribs 3e are formed, one for each vertical end rib 3d. Further, an appropriate number of one or more upper horizontal ribs 3f are formed on the outer surface 3a1 of the plate-like portion 3a located immediately below the upper end horizontal rib 3b to connect the opposite end side vertical ribs 3e. Has been. In this embodiment, an example in which two upper horizontal ribs 3f are formed is shown.

  On the outer surface 3a1 of the plate-like portion 3a, vertical ribs 3g and horizontal ribs 3h can be formed as necessary in addition to the above-described end side vertical ribs 3e and upper horizontal ribs 3f.

  In the short side wall 3 having the above-described configuration, the height (the height from the outer surface 3a1 of the plate-like portion 3a) of the upper end horizontal rib portion 3b 'of the upper end horizontal rib 3b located between the opposite end side vertical ribs 3e. The same applies hereinafter), the height of the upper horizontal rib portion 3f 'of the upper horizontal rib 3f located between the opposite end side vertical ribs 3e, and the upper horizontal rib 3b and a predetermined upper horizontal rib 3f (this embodiment) In the example, the height of the end-side vertical rib portion 3e ′ of the end-side vertical rib 3e located between the uppermost horizontal rib 3f) positioned at the bottom is substantially the same. In addition, other ribs, that is, an upper end horizontal rib portion 3b "of the upper end horizontal rib 3b not positioned between the opposing end side vertical ribs 3e, an end not positioned between the upper end horizontal rib 3b and the predetermined upper horizontal rib 3f. End-side vertical rib portion of the portion-side vertical rib 3e 3e ", the lower end horizontal ribs 3c, vertical end ribs 3d, is configured higher than the height of such vertical ribs 3g and horizontal rib 3h.

  The other ribs described above, that is, the upper end horizontal rib portion 3b "not positioned between the opposing end side vertical ribs 3e, and the end side vertical rib portion not positioned between the upper end horizontal rib 3b and the predetermined upper horizontal rib 3f 3e ″, the lower end horizontal rib 3c, the vertical end rib 3d, the vertical rib 3g, the horizontal rib 3h, etc. are all formed at the same height, and therefore the virtual plane formed by the tips of these ribs is Similar to the outer side face F1 of the long side wall described above, it is formed as a flush virtual plane.

  As described above, the height of the upper horizontal rib portion 3b ′ located between the opposite end side vertical ribs 3e, the height of the upper horizontal rib portion 3f ′ located between the opposite end side vertical ribs 3e, and By setting the height of the end-side vertical rib portion 3e 'located between the upper end horizontal rib 3b and the predetermined upper horizontal rib 3f to be higher than the heights of the other ribs, Similar to the upper band-shaped protrusion P1 formed on the outer wall surface F1 of the long side wall 2 described above, an upper band-shaped protrusion P2 extending outward from the outer wall surface of the short side wall 1 is formed.

  By forming the upper belt-like protrusion P2 as described above on the short side wall 3, even if an external force is applied to the upper part of the short side wall 3 of the folding container assembled in a box shape, the short side wall 3 is in the length direction. In simple terms, there is no bending deformation. For example, when an article is stored in a folding container assembled in a box shape, the article presses the upper part of the short side wall 3 from the inside, and the short side wall 3 is curved and deformed outward in the length direction. Thus, the engagement state between the engagement frame 7 of the short side wall 3 and the engagement frame 4 of the long side wall 2 may be released. However, in the present invention, the upper side wall projection P2 is formed on the short side wall 3. Since it is formed, it is possible to prevent such deformation of the short side wall 3 and to increase the strength and rigidity of the short side wall 3. .

  Next, a more specific configuration of the bottom 1 will be described with reference to FIGS. 3, 11, and 12.

  As shown in FIG. 3, at both ends of the long side bank portion 1a of the bottom portion 1, a short side extending in the direction of the short side bank portion 1b and having the same height as the long side bank portion 1a. A side extension bank portion 1c is formed, and a fitting base 1d having a substantially L shape in plan view is formed by both end portions of the long side bank portion 1a and the short side extension bank portion 1c.

  On the back surface of the bottom portion 1, a fitting member 1 ′ located slightly inside from the periphery of the back surface is formed. The fitting member 1 ′ includes a short wall portion 1 e 2 opposed to the opposed long wall portion 1 e 1 and A peripheral wall 1e is formed. In the peripheral wall 1e, a large number of long ribs 1e3 parallel to the long wall portion 1e1 are formed, and a number of short ribs 1e4 parallel to the short wall portion 1e2 are formed.

  Similarly, when the folded containers in the folded state are stacked on the folded container located in the lower position, they are placed on the four corners of the bottom 1 of the folded container in the folded state located in the lower position. The fitting member 1 ′ formed on the back surface of the bottom portion 1 of the folded folding container positioned above is fitted to the formed fitting base 1 d having a substantially L-shaped planar shape. And therefore horizontal movement of the upper folded container relative to the lower folded container is suppressed, so that a number of folded containers are It is configured so that it can be stacked in a stable state.

  When the folded containers in the folded state are stacked, the fitting member 1 ′ formed on the back surface of the bottom portion 1 of the folded container in the folded state is folded in the lower position It will contact | abut to the upper strip | belt-shaped protrusion part P1 formed in the long side wall 2 located in the top of this folding container. Therefore, in this embodiment, the fitting member 1 ′ formed on the back surface of the bottom portion 1 includes a plurality of long ribs 1e3 and short ribs 1e4, as shown in FIG. Alternatively, as shown in FIG. 12, the height of the long rib 1e3 (the height from the back surface of the bottom portion 1) and the height of the short rib 1e4 (the height from the back surface of the bottom portion 1) are set. By forming the fitting member 1 'to be low, a strip-shaped recess B1 having a length equal to or longer than the length of the upper strip-shaped protrusion P1 is formed along the long rib 1e3 at a predetermined interval. Has been.

  When the folded containers in the folded state are stacked, two strips formed on the fitting member 1 ′ formed on the back surface of the bottom part 1 of the folded container in the folded state located above. Of the pair of long side walls 2 of the folded folding container positioned below, the upper band-shaped protrusion P1 formed on the long side wall 2 positioned above is inserted into one band-shaped concave portion B1 of the recess B1. It is configured to be. Therefore, the fitting member 1 ′ formed on the back surface of the bottom portion 1 of the folded folding container positioned on the upper side is the upper side wall 2 of the folded folding container positioned on the lower side. The folded container in the folded state, which is in contact with the upper belt-like protrusion P1 formed on the long side wall 2 located on the upper side, is not lifted up, and therefore, the folded container container is in the folded state. The stacking height can be lowered, and thus the accommodation efficiency of the folded container in the folded state can be increased.

  As described above, since the upper belt-like protrusion P1 is formed on the outer wall surface F1 of the long side wall 2 and the upper belt-like protrusion P2 is formed on the outer wall surface of the short side wall 3, the long side wall 2 and the short side wall 3 The strength and rigidity, in particular, the strength and rigidity of the upper portions of the long side wall 2 and the short side wall 3 can be increased. Therefore, deformation and damage of the folding container assembled in a box shape can be prevented, and the short side wall 3 can be prevented. It is possible to prevent the engagement state between the engagement frame 7 and the engagement frame 4 of the long side wall 2 from being released.

  Instead of the engagement means by the engagement frame 7 of the short side wall 3 and the engagement frame 4 of the long side wall 2, or the engagement means by the engagement frame 7 of the short side wall 3 and the engagement frame 4 of the long side wall 2 In addition to the above, it is well known that a lock member for locking the short side wall 3 and the long side wall 2 is disposed on the short side wall 3 that is tilted first after being assembled in a box shape. Even when the lock member is disposed, as described above, the upper belt-like protrusion P1 is formed on the outer wall surface F1 of the long side wall 2, and the upper belt-like protrusion P2 is formed on the outer wall surface of the short side wall 3. Thereby, since the deformation | transformation of the folding container assembled by the box shape can be prevented, it can prevent that the engagement state of the short side wall 3 and the long side wall 2 by a locking member is cancelled | released.

  In the embodiment described above, two strip-shaped recesses B1 into which the upper strip-shaped protrusions P1 can be inserted are formed on the fitting member 1 ′ formed on the back surface of the bottom portion 1 at a predetermined interval. 7 and FIG. 8, of the long side walls 2 facing each other in a substantially vertical state, one long side wall 2 is tilted first, and then the other long side wall 2 is tilted. In the case where the long side wall 2 is first tilted and then one long side wall 2 is tilted, the position of the upper belt-like protrusion P1 formed on the long side wall 2 located above the pair of long side walls 2 is This is because the upper band-shaped protrusion P1 is inserted into the band-shaped recess B1 regardless of which long side wall 2 is tilted first.

  In this embodiment, in the folded state, the pair of short side walls 3 that are first tilted in the direction of the bottom 1 are configured not to overlap each other. In such a folding container, when the upper belt-like protrusion P2 is formed on the upper surface (outer wall surface) of the short side wall 3 that is tilted so as to overlap the bottom portion 1, a pair of short side walls that have been tilted first. 3, of the pair of long side walls 2 to be tilted next, the upper surface (outer wall surface) of the short side wall 3 in which the inner surface 2 a 2 of the plate-like portion 2 a of the long side wall 2 to be tilted first is overlapped with the bottom portion 1. ) Formed on the upper belt-like protrusion P2. Therefore, as shown in FIG. 13, the inner surface 2a2 of the plate-like portion 2a of the long side wall 2 has an upper band shape formed on the upper surface (outer wall surface) of the short side wall 3 that is tilted so as to overlap the bottom portion 1. A vertically long vertical strip-shaped recess W2 into which the protruding portion P2 can be inserted is formed so as to be substantially orthogonal to the horizontal strip-shaped recess W1 formed on the inner surface 2a2 of the plate-shaped portion 2a of the two strips and the long side wall 2.

  As described above, the inner surface 2a2 of the plate-like portion 2a of the plate-like portion 2a of the long side wall 2 is formed with the vertical band-like concave portion W2 substantially orthogonal to the horizontal band-like concave portion W1, and the pair of short side walls 3 that have been tilted first. The upper belt-like protrusion P2 formed on the inner surface 2a2 of the plate-like portion 2a of the long side wall 2 that is first tilted out of the pair of long side walls 2 that are tilted next to the pair of short side walls 3 that have been tilted first. The height of the pair of short side walls 3 collapsed in a substantially horizontal state and the pair of long side walls 2 collapsed in a substantially horizontal state is set. Therefore, the height of the folded container in the folded state can be lowered, and thus the accommodation efficiency of the folded container in the folded state can be increased.

  Next, another embodiment will be described with reference to FIGS.

  In this embodiment, the upper part of the short side wall 3 that is tilted first from the state assembled in a box shape is also configured to overlap each other, like the long side wall 2 in the above-described embodiment.

  As described above, when the upper portions of the short side walls 3 that are tilted first are configured to overlap each other, the plate-like portion 3a of the short side walls 3 is formed on the inner surface in the same manner as the long side walls 2 in the above-described embodiment. By expanding from the 3a2 side in the direction of the outer surface 3a1, a horizontally long horizontal strip-shaped recess W3 is also formed on the inner surface 3a2 of the plate-like portion 3a of the plate-like portion 3a as shown in FIG.

  Further, in the same manner as shown in FIG. 13, one horizontal strip-like recess W1 and two vertical strip-like recesses W2 are formed on the inner surface 2a2 of the plate-like portion 2a of the long side wall 2.

  From the state assembled in the box shape, one of the opposing short side walls 3 is brought down so as to overlap the bottom portion 1, and then the other short side wall 3 is put on the one short side wall 3 whose top is turned down first. In this case, the upper belt-like protruding portion P2 protruding from the outer wall surface of one of the short side walls 3 that has been previously tilted is the upper side of the other short side wall 3 that is to be tilted later. It is comprised so that it may insert in the horizontal strip | belt-shaped recessed part W3 formed in inner surface 3a2 of the plate-shaped part 3a. Therefore, the height of the overlapping portion of the pair of short side walls 3 whose upper portions are tilted so as to overlap each other can be lowered, and therefore the height of the folded container in the folded state can be lowered.

  Thereafter, one long side wall 2 of the opposing long side walls 2 is tilted first, but of the opposing short side walls 3, it is formed on the upper surface (outer side surface) of the short side wall 3 that is tilted later. The upper belt-like protrusion P2 is inserted into one of the two vertical belt-like recesses W2 formed on the inner surface 2a2 of the plate-like portion 2a of the long side wall 2 that is tilted first. become. After that, when the other long side wall 2 of the opposing long side walls 2 is tilted so as to overlap the one long side wall 2 that has been tilted first, the upper surface of the one long side wall 2 that has been tilted first. The upper belt-like protrusion P1 formed on the (outer side surface F1) is configured to be inserted into a horizontal belt-like recess W1 formed on the inner surface 2a2 of the plate-like portion 2a of the other long side wall 2 that is tilted later. ing.

  By comprising as mentioned above, the height of the folded container of the folded state can be made low.

  In addition, the configuration as described above is configured such that the short side walls 3 that are tilted first from the state assembled in the box shape do not overlap each other, and the long side walls 2 that are tilted later do not overlap each other. The present invention can also be applied to a folding container that is configured as follows. In the case of such a folding container, it is not necessary to form the horizontal strip-shaped concave portion W1 as described above on the long side wall 2, and it is necessary to form the horizontal strip-shaped concave portion W3 as described above on the short side wall 3. Absent.

  In the above-described folding container, since the long side wall 2 that is tilted in the direction of the bottom portion 1 is also tilted in a substantially horizontal state so that it does not overlap with each other, the long side wall 2 that is tilted in the direction of the bottom portion 1 is also tilted. The upper belt-like protrusions P1 formed on the outer wall surface F1 of the long side wall 2 are arranged in parallel to each other. Accordingly, the fitting member 1 ′ formed on the back surface of the bottom portion 1 has a band-shaped recess B <b> 1 into which a pair of upper band-shaped protrusions P <b> 1 formed on the outer wall surfaces of the pair of long side walls 2 in a collapsed state can be inserted. Two lines will be formed.

  By comprising in this way, the stacking height of the folded container of the folded state can be made low, Therefore The accommodation efficiency of the folded container of the folded state can be improved.

  As described above, when the band-shaped recess B1 is formed in the fitting member 1 ′ formed on the back surface of the bottom part 1, the strength and rigidity of the bottom part 1 are reduced, so that the fitting near the band-shaped recess B1 is performed. It is preferable to narrow the pitch interval of the long ribs 1e3 and / or the pitch interval of the short ribs 1e4 constituting the member 1 ′ as shown in FIGS. Such a region in which the pitch interval of the long ribs 1e3 and / or the pitch interval of the short ribs 1e4 constituting the fitting member 1 ′ in the vicinity of the belt-shaped recess B1 is formed narrow is shown in FIGS. In FIG.

  Note that the folding container having the above-described configuration can be applied to the relationship between the large box and the small box. For example, a plurality of folded small boxes are stacked side by side in a folded large box. In such a case, the folded state of the folded state is located below. The upper belt-like projection portion is formed so that the upper belt-like projection portion P1 formed on the long side wall 2 of the large box can be inserted into the belt-like concave portion B1 formed on the bottom portion 1 of the folded small box located above. The positions of P1 and the strip-shaped recess B1 are set as appropriate.

FIG. 1 is a perspective view of a folding container of the present invention in a box shape. FIG. 2 is a perspective view of the folding container of the present invention during assembly or folding. FIG. 3 is a perspective view of the folding container of the present invention in a folded state. FIG. 4 is a partial perspective view of a long side wall constituting the folding container of the present invention. FIG. 5 is also a partial perspective view of a long side wall constituting the folding container of the present invention. FIG. 6 is a vertical cross-sectional view along the short side bank portion of the bottom of the long side wall constituting the folding container of the present invention. FIG. 7 is a vertical cross-sectional view along the short side bank portion of the bottom portion in a state where the folding container of the present invention is folded. FIG. 8 is also a vertical cross-sectional view along the short side bank portion of the bottom in a state where the folding container of the present invention is folded. FIG. 9 is a partial perspective view of a short side wall constituting the folding container of the present invention. FIG. 10 is also a partial perspective view of a short side wall constituting the folding container of the present invention. FIG. 11 is a rear perspective view of the bottom part of the folding container of the present invention. FIG. 12 is a partial rear perspective view of the bottom part of the folding container of the present invention. FIG. 13 is a perspective view of the folding container according to another embodiment of the present invention during assembly or folding. FIG. 14 is a partial perspective view of a short side wall of a folding container according to another embodiment of the present invention. FIG. 15 is a perspective view of a folding container according to still another embodiment of the present invention assembled in a box shape. 16 is a perspective view of the folding container shown in FIG. 15 during assembly or folding. FIG. 17 is a perspective view of the folded container shown in FIG. 15 in a folded state.

Explanation of symbols

B1 ............ Strip-shaped recesses P1, P2 ............ Upper strip-shaped protrusions W1, W3 ............ Horizontal strip-shaped recesses W2 ......・ ・ ・ ・ ・ Vertical strip-shaped recess 1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Bottom 1a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Long side bank 1b ・ ・ ・ ・ ・ ・ ・ ・・ Short side bank part 2 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Long side wall 3 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Short side wall

Claims (1)

In a folding container having opposing side walls that are tilted first from the box-type state and opposite side walls that are tilted later from the box-type state, an upper portion of the outer wall surface of the opposing side wall that is tilted first from the box-type state and the box By forming ribs higher than the ribs formed on the outer wall surface of the side wall at the upper part of the opposite side walls that are later tilted from the mold state, an upper band-like protrusion parallel to the upper end horizontal rib of the side wall is formed. In addition, a horizontally long horizontal band-shaped recess is formed on the inner surface of the side wall of the opposite side wall that is to be tilted later, and the upper band-shaped protrusion formed on the side wall that is to be tilted first among the opposite side walls to be tilted later is A folding container configured to be inserted into a horizontal belt-like recess formed on a side wall that is to be tilted later.

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