JP4758718B2 - Folding box made of synthetic resin - Google Patents

Description

  The present invention relates to a folding box made of synthetic resin.

  Conventionally, a corrugated cardboard folding box is generally used as the folding box (see, for example, Patent Document 1).

  However, the cardboard folding box is weak and easy to tear, and it is easy to get dirty, and if it gets dirty, the dirt is difficult to remove and cannot be cleaned. For these reasons, the cardboard folding box is only once. This is not preferable from the viewpoint of resource saving. Even if a cardboard folding box is reused, it is weak as described above, easily contaminated, difficult to remove once it becomes dirty, and cannot be cleaned, so it can be reused only 3-5 times at most. In addition, cardboard folding boxes before being assembled into a box shape are folded flat and stored side by side in a state of being folded down sideways, or transported, but cardboard folding boxes are In the folded state, it is folded so that the center part is slightly higher than the outer end part, so the folded shape is not stable. There is a possibility that the box is placed in a state inclined to one side end portion side, and the placement is not stable, and since it is made of corrugated cardboard, it is slippery. There is a problem that it is easy to collapse.

  Patent Document 2 proposes a synthetic resin folding box as a folding box that can be folded and assembled into a box shape similar to a cardboard folding box and is compatible with a cardboard folding box. .

The synthetic resin folding box compatible with the corrugated cardboard folding box shown in Patent Document 2 can be used in the same manner as the conventional corrugated cardboard folding box, but compared with the corrugated cardboard folding box. It has the characteristics that it is strong, easy to remove dirt, can be washed, and can be reused many times. However, since it folds so that it is flat like a cardboard folding box, the folded shape is not stable, and it is folded so that it is flat like a cardboard folding box for transportation and storage. If the stack is stored horizontally or transported in a vertically folded state, it cannot be stably stacked.In particular, the upper and lower folding boxes are touched by the side plates made of hard synthetic resin. Therefore, there is a problem that it is more slippery than the case of corrugated cardboard, and the load is more easily collapsed when many stages are stacked.
JP-A-8-169436 JP-A-8-282648

  The present invention has been invented in view of the above-described conventional problems, and can be prevented from collapsing with a simple configuration even when stacked in a multi-stage vertically in a flat folded state, and has a high strength, It is an object of the present invention to provide a synthetic resin folding box that is easy to clean, can be cleaned, and can be reused any number of times.

In order to solve the above-mentioned problem, the folding box made of synthetic resin according to the present invention folds the adjacent side end portions of the four side plates 1 made of hard synthetic resin facing the front, rear, left and right with the side plate connecting hinge portion 2. When connected to each other and assembled into a box shape, it becomes rectangular or square in plan view, and when folded, the corners of one pair of diagonal parts become acute and the corners of the other pair of diagonal parts become obtuse A folding box 7 made of synthetic resin that can be folded flatly after being folded into a substantially parallelogram shape, with the folding box 7 folded flatly and laid sideways, the slip portion 13 made of soft synthetic resin provided on either or both of the upper surface to the lower surface of the portion of the side plate 1 which is exposed at the side, co When the side plate connecting hinge part 2 made of soft synthetic resin Side plate connecting hinge part 2 is also used the slip portion 13, that formed by molding integrally with the side plate connecting hinge part 2 made of plate 1 and the soft synthetic resin made of a hard synthetic resin by two-color molding of a synthetic resin It is characterized by.

With such a configuration, it can be folded in the same way as a cardboard folding box and can be assembled in the same box shape, and it is a synthetic resin folding that is compatible with a cardboard folding box. A box can be provided, and in addition to being compatible with a cardboard folding box, it is made of synthetic resin, so it has high strength, is easy to remove dirt, can be washed, and can be reused any number of times. Moreover, the synthetic resin folding box that is compatible with the cardboard folding box as described above has a problem that when it is folded flat and stacked, it is easy to slip and collapse due to the synthetic resin. As described above, the synthetic resin folding box 7 is folded flat and laid sideways, and is softly synthesized on one or both of the upper surface side and the lower surface side of the side plate 1 exposed on the upper surface side and the lower surface side. The anti-slip part 13 made of resin is provided, so that it is made of synthetic resin, but it can be folded and folded vertically even if it is stacked flatly in the state of being folded flatly for transportation and storage. The boxes 7 are brought into contact with each other by a non-slip portion 13 made of a soft synthetic resin to prevent slipping. As a result, the synthetic resin folding box 7 is flatly folded up and down in multiple stages. Even if they are stacked, the collapse of the load is prevented, and even when stacked in a flat state with a slight shift up and down, or stacked in different directions, the anti-slip portion 13 can surely prevent slipping and is stable. Can be stacked. Further, the side plate connecting hinge portion 2 for connecting the side plates 1 in a foldable manner can also be used as the anti-slip portion 13, simplifying the configuration, and further, the side plate 1 made of hard synthetic resin and the side plate connecting hinge portion made of soft synthetic resin. 2 are integrally formed by two-color molding of synthetic resin, the side plate 1 and the side plate connecting hinge portion 2 that also serves as the anti-slip portion 13 are firmly integrated, and the anti-slip portion 13 is peeled off from the side plate 1. In addition, the side plate connecting hinge portion 2 made of a soft synthetic resin is less likely to be damaged even after repeated use and has a longer life than a thin hinge made of hard synthetic resin.

  Further, the bottom piece 4 made of hard synthetic resin is rotatably extended from the lower side of the side board 1 made of hard synthetic resin via the bottom piece connecting hinge portion 5, and the bottom piece 4 is attached to the side plate 1 with the folding box 7 folded flat. However, it is preferable that it can be extended so as to be substantially flush with the surface, and a non-slip portion 13 made of a soft synthetic resin is provided on the outer surface of the bottom piece 4.

  By adopting such a configuration, the synthetic resin folding box 7 is folded flat and stacked in multiple stages in the vertical direction, and is made of a soft synthetic resin slip stopper provided on the side plate 1 of the folded folding box 7 above and below. In addition to the anti-slip effect provided by the part 13, the anti-slip effect provided by the anti-slip part 13 provided on the bottom piece 4 is added, so that it can be prevented from slipping when further folded and stacked in multiple stages, and can be stably stacked in multiple stages. And has an excellent anti-load collapse effect.

  Further, a lid member 15 made of hard synthetic resin is rotatably extended from the upper side of the side plate 1 made of rigid synthetic resin via a lid piece connecting hinge portion 10, and the lid piece 15 is folded in a flat state. The side plate 1 is preferably extendable so as to be substantially flush with the side plate 1, and a non-slip portion 13 made of a soft synthetic resin is provided on the outer surface of the lid piece 15.

  By adopting such a configuration, the synthetic resin folding box 7 is folded flat and stacked in multiple stages in the vertical direction, and is made of a soft synthetic resin slip stopper provided on the side plate 1 of the folded folding box 7 above and below. In addition to the anti-slip effect by the portion 13, the anti-slip effect by the anti-slip portion 13 provided on the lid piece 15 is added, so that it can be prevented from slipping when further folded and stacked in multiple stages, and can be stably stacked in multiple stages. It is possible to prevent load collapse.

The present invention is compatible with corrugated cardboard folding boxes, but is stronger than corrugated cardboard, easy to remove dirt, can be washed and reused any number of times, and the side plate is made of hard synthetic resin. However, when stacking up and down in a flat state in a flat state, the non-slip portion made of a soft synthetic resin can surely prevent slipping and can be stably stacked, preventing collapse of the load. In addition, the side plate connecting hinge part that foldably connects the side plates can also serve as an anti-slip part, simplifying the configuration, and the side plate and the side plate connecting hinge part that also serves as the anti-slip part can be firmly integrated and slipped. The stopper does not peel off from the side plate, and the side plate connecting hinge portion made of a soft synthetic resin is less likely to break even after repeated use and has a long life compared to a thin hinge made of hard synthetic resin.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  1 to 4 show an embodiment of the present invention. The synthetic resin folding box 7 shown in the present embodiment includes four thin plate-like side plates 1 in which adjacent side plates 1 are connected to each other so as to be freely foldable by side plate connecting hinges 2, and lower end edges of the four side plates 1. 4 thin plate-like bottom pieces 4 provided so as to be foldable along the bottom piece connecting hinge part 5 and foldable via the lid piece connecting hinge part 10 along the upper edge of one or more side plates 1. It is comprised with the 1 or several thin plate-shaped cover piece 15 provided in series.

  The four side plates 1, the four bottom pieces 4, and one to a plurality of lid pieces 15 are formed of hard synthetic resin, and the side plate connecting hinge portion 2, the side plate 1, and the side plates 1 adjacent to each other are connected to each other. The bottom piece connecting hinge portion 5 that connects the bottom piece 4 and the lid piece connecting hinge portion 10 that connects the side plate 1 and the lid piece 15 are all formed in a thin plate shape with a soft synthetic resin.

  The synthetic resin folding box 7 as described above is formed by two-color molding of a synthetic resin, for example, as shown in a development view shown in FIG. That is, the side plate 1, the bottom piece 4, by primary injection molding a hard synthetic resin such as PP (polypropylene), PE (polyethylene), HDPE (high density polyethylene), PC (polycarbonate), PVC (vinyl chloride resin), ABS resin, The lid piece 15 is molded, and then a soft synthetic resin such as TPE (elastomer), LDPE (low density polyethylene), EVA (ethylene vinyl acetate copolymer), etc. is subjected to secondary injection molding, and the side plate connecting hinge part 2 and the bottom piece connecting hinge part 5. By forming the lid piece connecting hinge portion 10 so as to be laminated and integrated with respect to the side plate 1, the bottom piece 4, and the lid piece 15, the lid piece connecting hinge portion 10 can be integrally molded by the same injection mold apparatus. Thus, the side plate connecting hinge portion 2, the bottom piece connecting hinge portion 5, and the lid piece connecting hinge portion 10 are formed so as to be laminated and integrated with the side plate 1, the bottom piece 4, and the cover piece 15 by secondary injection molding of soft synthetic resin. By doing so, compared to a hinge made of a hard synthetic resin and thin in a V shape, it is less likely to be damaged by repeated bending and the service life is prolonged.

  Here, in the three corner portions among the four corner portions formed by the end portions of the four side plates 1, both end portions of the plate-like side plate connecting hinge portion 2 made of soft synthetic resin are adjacent to each other as shown in FIG. 4. It is formed by two-color molding so as to be laminated and integrated on the outer surfaces of both end portions of the side plate 1 to be processed, but at the end portion of one side plate 1 of the two adjacent side plates 1 that become the remaining one corner portion. Is formed by two-color molding so that one end of the plate-like side plate connecting hinge portion 2 is laminated and integrated, but the other end of the plate-like side plate connecting hinge portion 2 is a free end, It is not integrated with the end of the other adjacent side plate 1 by two-color molding. And when assembling in a box shape, the tip of the plate-like side plate connecting hinge portion 2 whose tip is a free end is overlapped with the outer surface of the other side plate 1 adjacent thereto, or adhered with an adhesive, or bonded Made of corrugated cardboard by connecting the four side plates 1 to each other via a side plate connecting hinge portion 2 made of a soft synthetic resin in a plate shape by bonding with a tape or connecting with a stopper. Like the folding box (corrugated cardboard box), four side plates 1 made of hard synthetic resin are assembled into a box shape as shown in FIGS. 2 and 3, or side plate connecting hinges as shown in FIGS. 1 (a) and 1 (b). The four side plates 1 can be folded into a flat state via 2. Further, the bottom piece 4 can also be formed so as to be perpendicular to the side plate 1 assembled in a rectangular tube shape so that the bottom pieces 4 can be overlapped to form a bottom in the same manner as a cardboard box. By extending so as to be flush with each other, it can be folded thinly as shown in FIG. Further, the lid piece 15 can close the upper opening of the rectangular tube by being tilted so as to be perpendicular to the side plate 1 assembled into a rectangular tube shape, and is flush with the side plate 1 folded in a flat state. By spreading so as to be, it can be folded thinly as shown in FIG.

  In this embodiment, a stored item is put in the synthetic resin folding box 7 assembled in a box shape, the lid piece 15 is tilted, and the upper opening is closed. It is transported or stored in this stored state. In the non-use state, as shown in FIGS. 1A and 1B, the folding box 7 is folded flat to reduce the bulk and transport or store.

  When transporting or storing in this non-use state, the folding box 7 is folded flatly as described above, and is stacked and stacked in multiple stages in the vertical direction. However, since the contact portion between the upper and lower side plates 1 is slippery and cannot be stably stacked because it is made of synthetic resin, in the present invention, the folding box 7 is folded flat and laid sideways. An anti-slip portion 13 made of a soft synthetic resin is provided on one or both of the upper surface side to the lower surface side of the portion of the side plate 1 exposed on the upper surface side and the lower surface side in a state, and is in a state of being flatly folded When it is tilted sideways and stacked in multiple stages in the vertical direction, as shown in FIG. 1 (c), the anti-slip effect by the anti-slip part 13 can prevent slipping even if stacked in multiple vertical stages and prevent collapse of the load. Like Going on.

  The non-slip portion 13 made of a soft synthetic resin is provided on a part or the whole of the outer surface of the side plate 1. When the anti-slip portion 13 is provided on a part of the outer surface of the side plate 1, the outer surface of the side plate 1 made of hard synthetic resin. And slightly protrude outward from the outer surface of the side plate or the side plate.

  In the embodiment shown in FIG. 1 (a), a part or all of the outer surface of the bottom piece 4 made of hard synthetic resin and a part or all of the outer surface of the lid piece 15 made of hard synthetic resin are respectively made of soft synthetic resin. 13, when the plastic folding boxes 7 that are folded flat are tilted sideways and stacked in multiple stages in the vertical direction, in addition to the anti-slip effect by the anti-slip portion 13 in the side plate 1, the bottom piece 4 The anti-slip effect provided by the anti-slip part 13 provided on the lid and the anti-slip effect provided by the anti-slip part 13 provided on the lid piece 15 can be stably stacked in a multi-stage so as not to slip, and the load collapse prevention effect. Can be demonstrated.

  Here, as described above, the hard synthetic resin is subjected to primary injection molding to form the side plate 1, the bottom piece 4, and the lid piece 15, and then the soft synthetic resin is subjected to secondary injection molding to form the side plate connecting hinge portion 2 and the bottom piece connecting hinge. When the part 5 and the lid piece connecting hinge part 10 are formed so as to be laminated and integrated with the side plate 1, the bottom piece 4, and the lid piece 15, the side plate connecting hinge part 2 and the bottom piece connecting hinge part 5 made of soft synthetic resin. , Both end portions of the lid piece connecting hinge portion 10 are overlapped and integrated with the outer surface side of the side plate 1, the bottom piece 4, and the lid piece 15, respectively, so that the side plate connecting hinge portion 2 made of the soft synthetic resin, the bottom piece connecting hinge portion 5, Both ends of the lid piece connecting hinge portion 10 can be provided so as to protrude from the outer surface side of the side plate 1, the bottom piece 4, and the lid piece 15 or from the outer surface, and this soft synthetic resin portion is used as the anti-slip portion 13. Can also be used. Of course, a non-slip portion 13 made of a soft synthetic resin that is discontinuous with the hinge portion may be provided on the outer surface of the side plate 1, the bottom piece 4, and the lid piece 15 at a position apart from the hinge portions.

  Moreover, although the example which shape | molded the anti-slip | skid part 13 which consists of a soft synthetic resin by the two-color molding of a hard synthetic resin and a soft synthetic resin was shown in the said embodiment, the side plate 1, the bottom piece 4, and a lid piece which consist of a hard synthetic resin were shown. 15, a non-slip portion 13 made of a soft synthetic resin, which is separate from these, may be attached by an adhesive or other attachment means.

  Moreover, although the example which provided the anti-slip | skid part 13 in the outer surface of the side plate 1, the bottom piece 4, and the lid piece 15 was shown in the said embodiment, in this invention, the anti-slip part made from a soft synthetic resin at least on the outer surface of the side plate 1 was shown. 13 may be provided, and the anti-slip portion 13 is provided only on the outer surface of the side plate 1, the anti-slip portion 13 is provided on the outer surface of the side plate 1 and the outer surface of the bottom piece 4, or the outer surface and the lid piece of the side plate 1. The antiskid part 13 may be provided on the outer surface of 15.

  The anti-slip part 13 provided on the side plate 1 is not only the anti-slipping effect when it is folded flat and stacked in a multi-tiered state as described above, but also the next assembly box in the state of being assembled in a box shape. 7 and the side plates 1 are arranged side by side so that there is a displacement prevention function that prevents mutual displacement. In addition, when the non-slip portion 13 is provided on the outer surface of the bottom piece 4, it is assembled in a box shape as well as the anti-slip effect in the case of being folded flatly and stacked on top and bottom in a state of being tilted sideways as described above. In this state, the anti-slip portion 13 is grounded, and has an anti-slip effect when assembled in a box shape. In particular, the adjacent assembly box 7 and the side plates 1 come into contact with each other when assembled in a box shape. When the side walls 1 are arranged side by side, the effect of preventing slippage between the anti-slip portions 13 provided on the side plate 1 and the prevention of slippage due to the grounding of the folding box 7 itself due to the anti-slip portion 13 provided on the bottom piece 4 being grounded. Combined with the effect, the juxtaposed state can be stably maintained. In addition, when the non-slip portion 13 is provided on the outer surface of the bottom piece 4 or when the anti-slip portion 13 is provided on the outer surface of the lid piece 15, as described above, the flat pieces are stacked in multiple stages in a vertically folded state. In addition to the anti-slipping effect in the case of being stacked, there is an anti-slipping effect in the case of stacking up and down in the state of being assembled into a box shape, and in this case also, load collapse can be prevented.

  Next, another embodiment of the present invention will be described with reference to the embodiment shown in FIGS. In the embodiment shown in FIG. 1 to FIG. 4, when the synthetic resin folding box 7 is folded flat, the bottom piece 4 is extended so as to be substantially flush with the side plate 1. However, this embodiment shows a so-called bottom lock type synthetic resin folding box 7 in which each bottom piece 4 is folded so as to overlap the inner surface of each side plate 1 in a flat folded state.

  The folding box 7 made of a synthetic resin according to the present invention includes at least a rectangular tubular side wall constituting portion 3 made of a synthetic resin and a bottom plate constituting portion 6 made of a synthetic resin.

  As shown in FIGS. 5 to 9, the rectangular tubular side wall constituting portion 3 folds the adjacent side end portions of the side plate 1 made of four hard synthetic resins facing each other in the front, rear, left, and right sides by the side plate connecting hinge portion 2. The rectangular tubular side wall constituting part 3 is formed into a box shape in a rectangular shape or a square shape in a plan view, and when folded, as shown in FIG. After being folded into a substantially parallelogram shape so that the corners are acute and the corners of the other pair of diagonals are obtuse, they can be folded flat as shown in FIG. In the embodiment shown in the accompanying drawings, an example of a rectangular shape in plan view when assembled in a box shape is shown, but a square shape in plan view in a state assembled in a box shape may be used. Non-slip portions 13 made of soft synthetic resin are provided on the outer surface of the side plate 1 made of hard synthetic resin.

  Further, as shown in FIGS. 7 and 9, the bottom piece 4 made of hard synthetic resin is integrally extended from the lower side of the side plate 1 made of four hard synthetic resins on the front, rear, left and right sides through the bottom piece connecting hinge portion 5 as shown in FIGS. There is a bottom plate component 6 made of synthetic resin by the bottom pieces 4 made of the four hard synthetic resins. Each bottom piece 4 is rotated at the bottom piece connecting hinge part 5 so as to approach the inner surface side of the side plate 1 when the rectangular tubular side wall constituting part 3 is folded into a substantially parallelogram shape. 12, the side plate 1 is folded so as to overlap the inner surface.

  The rectangular tubular side wall constituting part 3 can be folded flatly after being folded into a substantially parallelogram shape from a state of being assembled into a rectangular shape or a square shape (that is, in a rectangular tubular shape) in plan view as described above. In this case, as shown in FIG. 5, the two side plates 1 (1a, 1b) on both sides of the corners of the pair of diagonal portions that are folded so as to have an acute angle when folded into the substantially parallelogram shape described above. One of the side plates 1a is overlapped with the side plate 1a at a right angle on the inner surface side of the end portion (the end portion on the corner portion that is folded so as to have an acute angle), and the margin absorption absorbing projection 8 The projecting piece is erected along the height direction of the side plate 1.

  The overlapping margin absorbing protrusion 8 is set to a length corresponding to the overlapping thickness in a folded state in which the four side plates 1 are folded into a substantially parallelogram and each bottom piece 4 overlaps the inner surface of each side plate 1. It is.

  In addition, as shown in FIG. 16, a corner portion formed by the upper end portion of the side plate 1 a and the upper end portion of the overlapping margin absorbing projection 8 is integrally connected by a corner connecting portion 30. Is a support for placing a part of the lid piece 15 in a state in which the lid piece 15 described later is closed. The corner connecting portion 30 has a substantially right triangle shape in plan view and extends to the tip of the overlapping margin absorbing projection 8.

  Moreover, the to-be-stopped part 36 is provided in the upper end part of the side plate 1b.

  One side plate 1 of two side plates 1a and 1b on both sides of a corner of a pair of diagonal portions that are folded so as to have an acute angle when folded into the substantially parallelogram shape (the long side in the attached drawings) One side portion of the bottom piece 4 (hereinafter referred to as the bottom piece 4a) continuously extending from the side plate 1a) has an acute angle (implemented) with respect to the lower sides of the both side plates 1a and 1b in a plan view when assembled in a box shape. The overlapping piece 11 protrudes through an inclined hinge portion 9 inclined at 45 ° in the form.

  Then, as shown in FIG. 14, the overlapping piece 11 is slidably coupled to the bottom piece 4 (hereinafter referred to as the bottom piece 4b) that is led out from the lower side of the other adjacent side plate 1b through the bottom piece connecting hinge portion 5. It is slidably coupled by means 17.

  Further, the two bottom pieces 4 adjacent to each other at the corners of the pair of diagonal parts that are folded so as to have an obtuse angle when folded into a substantially parallelogram shape are not connected to each other and are in a free relationship with each other. Yes.

  Further, a lid piece 15 made of hard synthetic resin is foldably connected to the upper side of the side plate 1 made of one or more hard synthetic resins via a lid piece connecting hinge portion 10. A non-slip portion 13 made of a soft synthetic resin is provided on the outer surface (upper surface) of the lid piece 15 made of the hard synthetic resin.

  In the embodiment shown in the accompanying drawings, the upper ends of the pair of side plates 1a (in the figure, the side plates 1a on the long side) on which the overlap allowance absorbing projections 8 are provided, out of the two pairs of opposing side plates 1 of the four side plates 1 A pair of lid pieces 15 having the same length as that of the upper end edge are continuously foldably connected to the edges via the lid piece connecting hinge portion 10, and the other pair of members not projecting the overlap allowance absorbing projection portion 8. A lid piece 15b having a length equal to the length of the upper edge is extended to the upper edge of the side plate 1b via the lid piece connecting hinge 10 so as to be foldable.

  One side half of the front edge of the pair of lid pieces 15 is provided with a mounting recess 32 having an upper surface, and the other half of the front edge is provided with a mounting protrusion 33 having a lower surface. The mounting concave portion 32 provided on one lid piece 15 faces the mounting projection piece portion 33 provided on the other lid piece 15 and the mounting projection piece portion 33 provided on one lid piece 15 has the other. The lid pieces 15 are arranged so as to face the mounting recesses 32 provided on the lid pieces 15. When the pair of lid pieces 15 are tilted sideways and the upper opening is closed, the opposed lid pieces 15 are placed on each other. The mounting projection piece 33 overlaps the mounting recess 32. A band material 34 made of soft synthetic resin is integrally projected from one side of the pair of lid pieces 15, and a stopper 35 made of hard synthetic resin is integrally formed at the tip of the band material 34. It is configured.

  In the embodiment shown in the accompanying drawings, the synthetic resin folding box 7 having the above-described configuration is formed by combining two box halves 12 as shown in FIGS. 16 and 17 formed by synthetic resin integral molding. It is.

  As shown in the developed views of FIGS. 16 and 17, the box half body 12 connects side ends of a pair of adjacent side plates 1 a and 1 b with side plate connecting hinge portions 2 (hereinafter referred to as side plate connecting hinge portions 2 a). The overlapping margin absorbing protrusion 8 is projected along the side end of the side plate 1a toward the inner surface at the side end of the one side plate 1a not connected by the side plate connecting hinge portion 2a. The corner portion formed by the upper end of the absorbing projection 8 and the upper end of the side plate 1a is integrally connected by the corner connecting portion 30, and further, on the side end of the other side plate 1b that is not connected by the side plate connecting hinge portion 2a. Another side plate connecting hinge portion 2 (hereinafter referred to as a side plate connecting hinge portion 2b) is provided, a connecting portion 18 is provided at the tip of the side plate connecting hinge portion 2b, and each of a pair of adjacent side plates 1a, 1b is provided. The bottom piece 4a from the lower side through the bottom piece connecting hinge 5 respectively. b, and an acute angle with respect to the bottom piece connecting hinge portion 5 that continuously feeds the bottom piece 4a to the side end opposite to the other bottom piece 4b of one of the adjacent bottom pieces 4a and 4b. The overlapping piece 11 is continuously provided through the inclined hinge portion 9 inclined at 45 ° in the embodiment. In the accompanying drawings, a lid piece 15 is continuously provided on the upper side of the side plate 1 via a lid piece connecting hinge portion 10. The box half body 12 having the above configuration is integrally formed by two-color injection molding of synthetic resin. The side plate 1, the bottom piece 4, the overlapping piece 11, the lid piece 15, the overlapping margin absorbing protrusion 8, and the corner connecting portion 30. The stopper 35 is formed of a hard resin such as PP (polypropylene), PE (polyethylene), HDPE (high density polyethylene), PC (polycarbonate), PVC (vinyl chloride resin), ABS resin, and the like. The side plate 1 and the side plate 1, the side plate 1 and the bottom piece 4, the bottom piece 4 and the overlapping piece 11, and the side plate 1 and the lid piece 15 are the side plate connecting hinge portions 2a and 2b, the bottom piece connecting hinge portion 5, the inclined hinge portion 9, and the lid piece, respectively. The side hinges 2a and 2b, the bottom piece connection hinge part 5, the inclined hinge part 9, and a part or all of the lid piece connection hinge part 10 are integrally connected to the connection hinge part 10 so as to be foldable. 34, for example, TPE (elastomer), LDPE (low density polyethylene), are molded by a soft resin such as EVA (ethylene-vinyl acetate).

  In the present embodiment, as described above, the hard synthetic resin is subjected to primary injection molding to form the side plate 1, the bottom piece 4, and the lid piece 15, and then the soft synthetic resin is subjected to secondary injection molding to form the side plate connecting hinge portion 2 and the bottom piece connecting. In forming the hinge portion 5 and the lid piece connecting hinge portion 10 so as to be laminated and integrated with the side plate 1, the bottom piece 4, and the lid piece 15, the side plate connecting hinge portion 2 and the lid piece connecting hinge portion 10 made of soft synthetic resin. Are overlapped and integrated on the outer surface side of the side plate 1, the bottom piece 4, and the lid piece 15, respectively, so that the side plate connecting hinge part 2, the bottom piece connecting hinge part 5, and the lid piece connecting hinge part 10 made of the soft synthetic resin are integrated. Both end portions may be provided so as to protrude from the side plate 1 and the outer surface side of the lid piece 15 or from the outer surface. As a result, the folding plate 7 is folded flat and laid sideways, and the side plate 1 that becomes the upper surface or the lower surface, the side plate connecting hinge portion 2 made of a soft synthetic resin at the portion of the lid piece 15, and both ends of the lid piece connecting hinge portion 10 And since the one end part of the bottom piece connection hinge part 5 is exposed, this part can be used also as the anti-slip | skid part 13 of a soft synthetic resin part.

  Here, the other end of the bottom piece connecting hinge 5 is overlapped and integrated with the outer surface (lower surface) side of the bottom piece 4, but in this embodiment, the bottom piece 4 is folded along the inner surface side of the side plate 1 in the folded state. The other end portion of the bottom piece connecting hinge portion 5 is not used as an anti-slip when folded and stacked in multiple stages. Therefore, when the other end portion of the bottom piece connecting hinge portion 5 is overlapped and integrated with the outer surface (lower surface) side of the bottom piece 4, the outer surface of the overlapping portion of the other end portion of the bottom piece connecting hinge portion 5 with the bottom piece 4 is not necessarily folded. It is not necessary to use the grounding part (bottom end) when assembled in a box shape. For example, when the outer surface of the overlapping portion of the other end portion of the bottom piece connecting hinge portion 5 to the bottom piece 4 is not used as the grounding portion (lowermost end) when the folding box 1 is assembled in a box shape, that is, the bottom piece connection of the hard synthetic resin When the other part of the bottom piece 4 other than the overlapping part with the hinge part 5 is the bottommost grounding part, the grounding part is made of a hard synthetic resin so that it slides on the floor in a state of being assembled in a box shape. Thus, the movement can be facilitated. Of course, when the outer surface of the overlapping portion of the other end portion of the bottom piece connecting hinge portion 5 to the bottom piece 4 is used as a grounding portion (lowermost end) when the folding box 1 is assembled in a box shape, as in the above-described embodiment. The portion of the soft synthetic resin is grounded, so that it can exhibit a slip prevention effect when assembled in a box shape, or can exhibit an anti-slip effect when stacked in upper and lower stages.

  Using the two box halves 12 integrally molded of synthetic resin as described above, the other box half 12 is provided on the overlapping margin absorbing protrusion 8 provided at the side end of one side plate 1a of the one box half 12. A connecting portion 18 provided at the tip of another side plate connecting hinge portion 2b provided at the side end of the other side plate 1b of the body 12 is overlapped and connected by the connecting means 16, and similarly the other box half body 12 is overlapped. A connecting portion 18 provided at the tip of the side plate connecting hinge portion 2b of one box half 12 is overlapped and connected to the energy absorbing projection 8. As a result, the two side plate connecting hinge portions 2a are positioned at a pair of diagonal portions and the other two side plate connecting hinge portions 2b are positioned at the other pair of diagonal portions. The side wall connecting hinge part 2b is formed into a square, and the side plate connecting hinge part 2b has an acute angle, and the side plate connecting hinge part 2a has an obtuse angle and is folded into a substantially parallelogram.

  In addition, the overlapping piece 11 of one box half 12 and the bottom piece 4b of the other box half 12 not overlapping the overlapping piece 11 overlap each other and are slidably coupled in an overlapping state by the slide coupling means 17. Similarly, the overlapping piece 11 of the other box half 12 and the bottom piece 4b of the other box half 12 not overlapping the overlapping piece 11 overlap each other and are slidable in an overlapping state by the slide coupling means 17. Join. That is, when the two box halves 12 are combined as described above to form the folding box 7, the corners of a pair of diagonal parts that are folded so as to have an acute angle when folded into a substantially parallelogram shape. The two bottom pieces 4a and 4b adjacent to each other are connected to be slidable through the inclined hinge portion 9 and the overlapping piece 11. Further, the bottom pieces 4 that are integrally formed at the time of forming the box halves 12 are not connected to each other and are in a free relationship with each other. That is, when the two box halves 12 are combined as described above to form the folding box 7, the corners of a pair of diagonal parts that are folded so as to have an obtuse angle when folded into a substantially parallelogram shape. The two bottom pieces 4 adjacent to each other in FIG. In this way, the bottom plate constituting portion 6 is configured to be foldable via the bottom piece connecting hinge portion 5 so that the four bottom pieces 4 overlap the inner surfaces of the side plates 1.

  Thus, the synthetic resin folding box 7 can be formed by combining and bonding the two box halves 12. In the present embodiment, the two box halves 12 to be combined have the same shape, and can be molded by a common molding die.

  The overlapping margin absorbing protrusion 8 and the connecting portion 18 provided at the tip of the side plate connecting hinge portion 2b are connected by the connecting means 16 as described above. In this case, the overlapping margin absorbing portion made of a hard synthetic resin is used. The connecting portion 18 connected to the protrusion 8 in an overlapping manner may be made of a soft synthetic resin in the same manner as the side plate connecting hinge portion 2b of soft synthetic resin, but the tip of the side plate connecting hinge portion 2b of soft synthetic resin. A hard synthetic resin connecting portion 18 may be provided in the portion (in the embodiment shown in the accompanying drawings, a hard synthetic resin connecting portion 18 is provided, and the inner surface of the soft portion at the tip of the soft synthetic resin side plate connecting hinge portion 2b is provided. Alternatively, an example in which a hard synthetic resin connection 18 is overlapped and integrated on the outer surface is shown).

  Although there is no limitation in particular as the connection means 16, For example, the connection by adhesion | attachment, welding, or engagement, the connection by a fixing tool etc. can be mentioned. In the case of connection by engagement, for example, as shown in FIGS. 16 and 17, an engagement portion 16a is provided on the overlapping allowance absorption projection 8 and the engaged portion 16b is provided on the side plate connection hinge portion 2b (connection portion 18) side. It is also possible to provide the engaging portion 16a with the engaged portion 16b.

  Further, the slide coupling means 17 that slidably couples the overlapping piece 11 and the bottom piece 4b in an overlapping state, for example, as shown in FIG. 14, projects a slide projection 19 on one of the overlapping piece 11 or the bottom piece 4b, On the other side, a slide hole 20 larger than the slide protrusion 19 into which the slide protrusion 19 is slidably inserted is formed, and a retaining portion 20 a for preventing the slide protrusion 19 from coming out of the slide hole 20 is provided in the slide hole 20. It is configured.

  The folding box 7 made of synthetic resin having the above-described configuration has four bottom pieces in a state in which the rectangular tubular side wall constituting portion 3 composed of the four side plates 1 is assembled so as to be rectangular or square in plan view (that is, in a rectangular tubular shape). 4a and 4b form a rectangular cylindrical bottom at a right angle to each side plate 1 while the overlapping piece 11 and the bottom piece 4b are slidably overlapped and assembled, and a box having an open top is assembled.

  In the state assembled in the box shape as described above, various stored items are stored in the folding box 7 made of synthetic resin, and then the lid piece 15 is tilted to close the upper opening of the folding box 7 as shown in FIG. In this case, in the corner portion of the folding box 7, the base portion of the end portion of the upper cover piece 15 integrally connects the corner portion formed by the upper end of the overlapping margin absorbing projection 8 and the upper end of the side plate 1 a. It is placed on the support part on the upper surface of the part 30.

  Thereafter, the stopper 35 is locked to the to-be-stopped portion 36. In this case, since the band member 34 is formed of a soft synthetic resin, the band member 34 has flexibility and a certain degree of elasticity (stretchability). Therefore, the band member 34 is bent and pulled downward. The stopper 35 provided on the lid piece 15 side can be easily engaged with the stopper 36 provided on the side plate 1b side and the belt 35 can be easily locked by engaging the stopper 35 with the stopper 36 in the stretched state. Since it is stopped in the stretched state using the elasticity of the material 34, the locked state is securely held. To release the lock, the band 35 is further extended by picking the stopper 35 with a finger and pulling it downward, so that the stopper 35 is released from the locked portion 36, so that the lock can be released. it can.

  As described above, the folding box 7 is transported and stored in a box shape, storing the stored items therein, and closing the upper opening with the lid piece 15. Here, assembling into a box shape as described above, the folding boxes 7 are stacked in multiple upper and lower stages for transport and storage. Here, when the folding boxes 7 whose upper openings are closed with the lid pieces 15 are stacked in a vertical direction in a state of being assembled in a box shape and containing the stored items therein, the corners of the lower folding box 7 are viewed from above. The load concentrates and the load is transmitted downward from the corner portion. In the present invention, as described above, the upper end of the overlap allowance absorbing protrusion 8 and the overlap allowance absorbing protrusion 8 are provided. The corner portion formed with the upper end of the side plate 1 projecting is integrally connected by the corner connecting portion 30, and the upper surface of the corner connecting portion 30 is assembled in a box shape and the lid piece 15 is closed. Therefore, the lid piece 15 is reliably supported at the corner and is not bent so as to sink downward. Thereby, even if the folding boxes 7 are stacked up and down in multiple stages, they can be stably stacked without collapsing. Moreover, in this embodiment, since the non-slip | skid part 13 is provided in the outer surface (upper surface) of the cover piece 15, when it piles up and down in the state made into the box shape, by the non-slip | skid part 13 provided in the cover piece 15 It is possible to prevent the upper folding box 7 from slipping and preventing the cargo from collapsing.

  At the time of non-use without storing the contents, the rectangular tubular side wall constituting portion 3 composed of the four side plates 1 as shown in FIGS. 6, 7, 8, and 9 is in an assembled state that is rectangular or square in plan view. As shown in FIG. 13, the rectangular side wall constituting portion 3 composed of the four side plates 1 is folded so as to be a substantially parallelogram, whereby the opposing side plates 1 are substantially parallel as shown in FIGS. 5 and 12. In addition, the bottom piece 4 can be folded in a flat state along the inner surface of the side plate 1. In this case, the overlap margin between the side plates 1 facing each other in the folded state and the bottom piece 4 overlapped along the inner surface of each side plate 1 can be absorbed by the overlap margin absorbing protrusion 8 and can be folded without difficulty.

  In this way, when the folding box 7 is folded flat and stacked in multiple stages up and down as shown in FIG. 15, the non-slip portion 13 made of a soft synthetic resin is provided on the outer surface of the side plate 1. The folded upper and lower folding boxes 7 are overlapped so that the hard synthetic resin side plate 1 does not overlap directly on the hard constituent resin side plate 1 and is easily stacked. In addition, since the non-slip portion 13 made of soft synthetic resin makes contact with the top and bottom to prevent slipping, the upper folding box 7 is not accurately stacked with respect to the lower folding box 7 and is stacked differently or differently. Even if stacked in the direction, as long as it is in contact with the anti-slip portion 13, the anti-slip is surely made and the stacking can be performed stably.

  Further, in the present invention, since the folding box 7 is made of synthetic resin, it has high strength, durability, stain resistance, and can be cleaned, so that it can be reused any number of times, and is economical and resource-saving. It can be planned.

  Further, when the rectangular tubular side wall constituting portion 3 composed of the four side plates 1 is assembled so as to be rectangular or square in a plan view or is folded into a substantially parallelogram, in the present invention, a substantially parallelogram shape is used. To one side portion of the bottom piece 4a that is continuous from one side plate 1a of the two side plates 1a, 1b on both sides of the corners of the pair of diagonal portions that are folded to have an acute angle when folded into The overlapping piece 11 protrudes through the inclined hinge part 9 inclined at an acute angle with respect to the both side plates 1 in the state of being assembled in a box shape, and the overlapping piece 11 is connected to the bottom piece connecting hinge part from the lower side of the other adjacent side plate 1b. 5 is slidably coupled to the bottom piece 4b that is continuously extended through 5 so that the square cylindrical side wall constituting portion 3 formed of the four side plates 1 is rectangular or square in plan view, Fold into shape At this time, the overlapping piece 11 slides while keeping the overlapping state with respect to the bottom piece 4b, so that the bottom piece 4a rotates with respect to the side plate 1a via the bottom piece connecting hinge portion 5 and overlaps with the side plate 1a. Is rotated through the inclined hinge portion 9, and at the same time, the bottom piece 4b is rotated relative to the side plate 1b via the bottom piece connecting hinge portion 5 while sliding in an overlapping state with respect to the overlapping piece 11. The box-shaped side wall constituting portion 3 made of the side plate 1 is made to be rectangular or square in plan view, and the four bottom pieces 4 are automatically rotated while the bottom plate constituting portion 6 made of the four bottom pieces 4 is used to rotate the box. Each bottom piece 4 is automatically formed on each side plate 1 by automatically and smoothly forming the bottom, or by folding the square tubular side wall constituting portion 3 composed of the four side plates 1 into a substantially parallelogram. Folds smoothly along the inner surface It is possible, we can solve the problem that can not be folded in folding box made of synthetic resin having a overlapping margin absorbing projection 8.

  The synthetic resin folding box 7 of the present invention has a side plate connecting hinge part 2, a bottom piece connecting hinge part 5, an inclined hinge part 9, and a cover piece connecting hinge part 10 partly or entirely formed of a soft synthetic resin. And stacked in a box shape, stacked in a substantially parallelogram shape, transported on a conveyor, or assembled in a box shape on a floor, conveyor, truck bed, or other When placed on a placing portion such as a synthetic resin folding box 7 or the like, the hinge portion made of a soft synthetic resin comes into contact with the placing portion, and the hinge portion exhibits a non-slip function. Can be prevented from slipping or slipping, and when an impact is applied, a hinge portion made of a soft resin acts to cushion the impact. In this case, if the outer surface of the hinge portion made of the soft synthetic resin is configured to protrude slightly outward from the outer surfaces of the side plate 1, the bottom piece 4, the overlapping piece 11, and the lid piece 15, a more anti-slip effect can be exhibited.

  By the way, in each above-mentioned embodiment, although the side plate connection hinge part 2, the bottom piece connection hinge part 5, the inclination hinge part 9, and part or all of the lid piece connection hinge part 10 were shown with the soft synthetic resin, The side plate 1 and the bottom piece 4 are formed as a thin synthetic resin hinge portion made of the same hard synthetic resin as the side plate 1, the bottom piece 4, the overlapping piece 11, and the like. Or the like. In this case, a non-slip portion 13 made of a soft synthetic resin is provided on the side plate 1, the bottom piece 4, and the overlapping piece 11 made of hard synthetic resin separately from the hinge portion.

  Further, the side plate connecting hinge portion 2, the bottom piece connecting hinge portion 5, the inclined hinge portion 9, the lid piece connecting hinge portion 10 and the like are connected to the side plate 1, the bottom piece 4, the overlapping piece 11, the side plate connecting hinge portion 2, the bottom piece connecting hinge portion 5, the inclined portion. The hinge portion 9 and the lid piece connecting hinge portion 10 are formed separately without being integrally formed, and overlap with the side plates 1, the side plate 1 and the bottom piece 4, and the bottom piece 4 by the connecting means through the separate hinge portions. The pieces 11 may be connected in a foldable manner. In this case, each hinge part may be made of synthetic resin or metal.

(A) is the perspective view of the state which folded the folding box made from the synthetic resin of this invention flatly, (b) is sectional drawing same as the above, (c) is the state piled up and down in multiple stages in the folded state FIG. It is a perspective view of the state assembled in the box shape same as the above. It is sectional drawing of the state assembled in the box shape same as the above. It is an expanded view same as the above. It is the perspective view of the folded state of other embodiment of the synthetic resin folding boxes of this invention. It is the perspective view seen from the upper direction of the state which assembled the folding box made from a synthetic resin same as the above in the box shape. It is the perspective view seen from the downward direction of the state which assembled the folding box made from a synthetic resin same as the above in the box shape. It is a plane sectional view of the state assembled in the box shape same as the above. It is a bottom view of the state assembled in the box shape same as the above. It is sectional drawing of the XX line of FIG. 8 same as the above. It is sectional drawing of the YY line | wire of FIG. 8 same as the above. (A) is sectional drawing of the folded state same as the above, (b) is an important section expanded sectional view of (a). It is the perspective view seen from the lower part which shows the state in the middle of folding same as the above. The part which connected the overlap piece and the bottom piece with the slide coupling | bonding means same as the above is shown, (a) is sectional drawing, (b) is the perspective view which fractured | ruptured partially. It is a partially abbreviated enlarged sectional view showing a state where it is folded up and down in multiple stages in the state of being folded flat. It is the perspective view seen from the top which shows the expansion | deployment state of a box half body same as the above. It is the perspective view seen from the bottom which shows the unfolded state of a box half body same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Side plate 2 Side plate connection hinge part 4 Bottom piece 5 Bottom piece connection hinge part 7 Folding box 10 Cover piece connection hinge part 13 Anti-slip part 15 Cover piece

Claims (3)

A rectangular shape or a square shape in plan view in a state where the side end portions of the four side plates made of hard synthetic resin facing the front, rear, left and right are connected to each other in a foldable manner at the side plate connecting hinges and assembled into a box shape, and A composition that can be folded flatly after being folded into a substantially parallelogram shape so that the corners of a pair of diagonal parts become acute angles and the corners of the other pair of diagonal parts become obtuse angles upon folding. It is a resin folding box, and it is a soft synthetic resin on one or both of the upper surface side and the lower surface side of the side plate exposed on the upper surface side and the lower surface side in a state where the folding box is folded flat and laid down sideways. provided become more slip section, the side plate connecting hinge portion with the side plate connecting hinge portion is made of soft synthetic resin also serves the slip section, the side plates and a soft case formed of a hard synthetic resin Side plate connecting hinge portion and made of synthetic resin folded box, characterized in that formed by integrally molded by two-color molding of synthetic resin made of a resin. The bottom piece made of hard synthetic resin is pivoted continuously from the lower side of the hard plastic side plate via the bottom piece connecting hinge, and the bottom piece is substantially flush with the side plate with the folding box folded flat. The synthetic resin folding box according to claim 1, characterized in that it can be freely extended and is provided with a non-slip portion made of a soft synthetic resin on the outer surface of the bottom piece. From the upper side of the hard synthetic resin side plate, the hard synthetic resin lid piece is pivotally extended via the lid piece connecting hinge, and the lid piece is substantially flat with respect to the side plate with the folding box folded flat. 3. A synthetic resin folding box according to claim 1 or 2, wherein the lid piece is provided with a non-slip portion made of a soft synthetic resin on the outer surface of the lid piece.

Images