JP2007039125A - Synthetic resin-made foldable box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a synthetic resin-made foldable box which can be exactly seized and stably held without slippage when any side of a hexahedral box is seized with both hands. <P>SOLUTION: The synthetic resin-made foldable box is the hexahedral box obtained by assembling a square pipe-like sidewall composing part 3 made by foldably connecting neighboring side ends of four rigid synthetic resin-made side panels 1 with each other by a sidewall connecting hinge 2, a bottom panel composing part 6 made by foldably connecting rigid synthetic resin-made bottom pieces 4 to downward sides of a plurality of bottom panels 1 through a bottom panel connecting hinge 5, and a cover composing part 7 made by foldably connecting rigid synthetic resin-made cover pieces 15 to upward sides of a plurality of side panels 1 through a cover piece connecting hinge 10. An outwardly projecting slippage preventing portion 13 of a soft synthetic resin-made is provided in the vicinity of one or both surfaces of surfaces perpendicularly neighboring via the sides of the hexahedron. The slippage preventing portion is provided in the vicinity of every side of the hexahedron. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

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

  Conventionally, the adjacent side end portions of the front, rear, left and right side surfaces are connected to each other in a foldable manner to form a rectangular shape or a square shape when assembled in a box shape, and the corners of the pair of diagonal portions are acute angles when folded. Patent Document 1 discloses a corrugated cardboard folding box that can be folded flatly by being folded into a substantially parallelogram shape so that the corners of the other pair of diagonal parts become obtuse angles. Yes. The folding box of the above form is folded so that the inner surfaces of the front, rear, left and right sides overlap in a folded state, so that it can be folded compactly and stored in a narrow space when not in use. Is simply folded flatly after being folded into a substantially parallelogram shape so that the corners of the pair of diagonal parts become acute and the corners of the other pair of diagonal parts become obtuse as described above. In addition to being able to fold, it can be made into a box just by making the opposite corners at right angles in the reverse procedure to the above, and it is easy to fold and assemble. is there.

  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. Also, the cardboard folding box usually has a pair of opposite sides of the lower surface held with both hands so as to hold the whole, but the outer surface of the cardboard folding box is smooth and slippery, There is a problem that the hand is slippery and difficult to hold. In addition, when holding in ways other than the above, for example, holding one side of the lower surface with one hand and holding one side of the upper surface of the box diagonally with the other hand Since the position of the cardboard box is unstable, it is more slippery and difficult to hold. Also, the cardboard folding box is turned upside down, back and forth, left and right upside down and gripped by hand, or the hexahedron corner can be gripped by hand as described above in various postures. With both hands, the cardboard folding box is easy to slide and hard to hold in either case of upside down, back and forth, or left and right. Further, when a string is hung on a cardboard folding box, there is a problem that the string is slippery and the string is misaligned or cannot be firmly bound. In this case, in order to prevent the string from slipping, the string is bound more strongly than necessary and the string is bitten into the cardboard folding box. However, this causes a problem that the cardboard folding box is damaged. Moreover, when the cardboard folding box is not in use, the cardboard folding box is folded flat and stored side by side in a state where it is tilted sideways and transported. The folding box is folded so that the center part is folded slightly higher than the outer end part in the folded state, so the folded shape is not stable, and the top part is centered on the center part when stacked vertically There is a possibility that the cardboard folding box may be placed in a tilted state on one side end side, the placement is not stable, and since it is made of cardboard, it is slippery and folded for these reasons There is also a problem that the load collapses easily even when many stages are stacked in the state. In addition, even when a cardboard folding box is assembled into a box shape and the contents are stored inside it, the upper folding box is compared to the lower folding box when stacked and stored in multiple stages. It is slippery and may 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 shown in Patent Document 2 is entirely formed of a hard synthetic resin including a hinge portion, and the hinge portion is a thin portion of the hard synthetic resin.

  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 cleaned, and can be reused any number of times. Synthetic resin folding boxes that are compatible with this corrugated cardboard folding box, like the corrugated cardboard folding box, usually have a pair of opposite sides at the lower end held with both hands to hold the whole. Because the hand-gripped part is made of hard synthetic resin, there is a problem that it is more slippery and harder to hold than a cardboard folding box. Because of its unstable posture, the synthetic resin folding box that is compatible with the cardboard folding box is upside down like the cardboard folding box. Hold it in various postures, such as gripping it with your hands by turning it back and forth, left and right, or holding the corners of the hexahedron with your hands. No change to hardly hold the slippery hands as described above in any case posture. Furthermore, even when a string is hung on a synthetic resin folding box, there is a problem that the string is more slippery because it is made of synthetic resin, and the string is displaced or cannot be firmly bound. Moreover, since the plastic folding box is also folded so as to be flat like the cardboard folding box, the folded shape is not stable, and it is the same as the cardboard folding box for transportation and storage. When folded and folded horizontally and stacked and stored in multiple stages and transported, stable stacking is not possible, especially the upper and lower folding boxes are made of hard synthetic resin Since the side plates are in contact with each other and stacked up and down, there is a problem that they are more slippery than in the case of corrugated cardboard, and more easily collapsed when stacked in a number of stages. In addition, the synthetic resin folding box is assembled and stored in a box shape with the contents stored in the upper and lower stages and stored or transported, but the synthetic resin folding box is Thus, the upper folding box is slippery with respect to the lower folding box, and the load collapses.

  In addition, the conventional synthetic resin folding box shown in Patent Document 2 is a single part formed by synthetic resin integral molding, so that in the case of a large folding box, the mold is enlarged. It causes cost increase.

  Also, it is made of a synthetic resin in which a panel serving as a side surface is connected to four sides of a panel serving as a bottom surface via hinge elements, and a panel serving as a lid surface is connected to the panel serving as a side surface via a hinge element. This assembly box is also known from US Pat.

  The assembly box of this patent document 3 is a state in which a plurality of hinge elements are integrally molded as a net by a first injection mold using a first plastic material, and this net is disposed in a second injection mold. Then, by injecting the second plastic material into the second injection mold and molding each side of the box, both sides of each piece of the net become panels of each side of the box made of the second plastic material It is obtained by insert molding inside the end of the metal, and the protruding tip of the convex protrusion provided on the net is slightly dotted like the outer surface of the end of the panel that becomes each surface of the box made of the second plastic material This slightly projecting point-like portion creates additional friction to prevent the boxes from sliding against each other.

  However, even if it is said that this patent document 3 shows that the anti-slip | skid is provided in the panel outer surface which comprises the surface of the hexahedron of a box, the convex shape which protruded from the net embed | buried in the thickness of the edge part of a panel Since the projecting tip of the projecting part is only exposed in the form of a dot and is not slippery, there is only a very small exposed area of the part that will be slippery and there is a problem that the antiskid effect cannot be fully demonstrated . In particular, when holding and holding a hexahedral box by hand, not only the position it has varies, but also due to the size and length of the person's hand and fingers, the degree of bending of the hand and fingers when hanging the fingers, etc. The position where the hand or finger hits changes in various ways.Therefore, it cannot be said that the hand or finger will surely hang on the point-shaped slip stopper, and even if the hand or finger hits the point-shaped slip stopper well, Therefore, only a slight friction acts on a very small part of the hand or finger, so that a sufficient anti-slip effect cannot be obtained when the box is held and held.

  Here, in Patent Document 3, the area of the protruding protrusion is increased, the exposed area at the tip of the protruding protrusion that is exposed on the outer surface of the panel is increased, and the hand and fingers are brought into contact with a wide area to cause friction. Although it is conceivable to improve the anti-slip effect due to the above, in Patent Document 3, both sides of each piece of the net are insert-molded inside the end of the panel which becomes each side of the box made of the second plastic material. Therefore, if the area of the convex protrusion is increased, the flow of the second plastic material is hindered when the second plastic material is injected, and it is difficult to go around to the side opposite the injection point of the convex protrusion. There is a problem that the second plastic material cannot be sufficiently filled in and cannot be accurately insert-molded. For this reason, the area of the projecting tip is made larger by increasing the area of the projecting protrusion. Rukoto can not. Therefore, a sufficient anti-slip effect cannot be obtained when the box is held by hand as described above.

  In addition, the assembly box of Patent Document 3 is such that a plurality of panels connected via a net are deployed in a flat state when the box is disassembled when not in use, and the box is compactly folded. is not. Therefore, there is a problem that the flat area is large when storing or transporting in a flat state and a large space is required, and there is a problem that it takes time to assemble and disassemble. Moreover, since it is disassembled into a flat shape when not in use as described above, there is a problem that each inner surface of the panel is exposed to the outside, and the inner surface of the panel becomes dirty, and the inner surface of the box is dirty when reused. There is a problem of soiling the contents.

Further, in Patent Document 3, since it is an assembly box obtained by insert molding when forming a surface of a box with another injection mold, a net in which a plurality of hinge elements are integrally formed, injection molding Two types of injection molds are required: a first injection mold for molding a net as a mold and a second injection mold for insert molding. There is a problem that it is difficult to position and hold at a predetermined position in the mold, it takes time for molding, and the molding cost increases.
JP-A-8-169436 JP-A-8-282648 Japanese Patent No. 3547763

  The present invention has been invented in view of the above-described conventional problems, and is a slip made of a soft synthetic resin having a relatively large area that can reliably prevent slipping of hands and fingers in the vicinity of all sides of a hexahedron. The stopper can be formed with a simple structure, and it can be held securely with both hands without slipping and holding any side of the hexahedron of the box with both hands, ensuring that the string does not slip It can be strapped, strong, easy to clean, can be washed, can be reused any number of times, and can be folded up and down and assembled in a box shape in multiple stages It is an object of the present invention to provide a synthetic resin folding box that is compatible with a cardboard folding box that can be prevented from collapsing with a simple structure even when stacked.

  In order to solve the above-mentioned problem, the synthetic resin folding box according to the present invention has the side plate connecting hinge portion 2 connecting the adjacent side end portions of the four side plates 1 made of the hard synthetic resin constituting the front, rear, left and right side surfaces. In a state of being assembled in a box shape by being foldably connected to each other, it becomes a rectangle or square in plan view, and when folded, the corners of a pair of diagonal parts become acute angles and the corners of the other pair of diagonal parts are obtuse From the rigid synthetic resin through the bottom side connecting hinge portion 5 on the lower sides of the side plates 1 and the side plates 1 which are configured to be folded flatly after being folded into a substantially parallelogram shape. The bottom plate constituting portion 6 which becomes the bottom surface of the box in a state where the bottom piece 4 is foldably connected and assembled into a box shape, and a rigid synthetic resin via lid piece connecting hinge portions 10 on the upper sides of the side plates 1. Cover piece 15 A synthetic resin folding box that is a hexahedron box in a state of being assembled in a box shape with a lid constituting part 7 that is a lid on the top surface of the box in a state of being assembled in a box shape that is configured to be foldably connected The side plate connecting hinge portion 2, the bottom piece connecting hinge portion 5 and the lid piece connecting hinge portion 10 are made of soft synthetic resin, and both side portions of the hinge portions are made of hard synthetic resin, the side plate 1, the bottom piece 4, and the lid, respectively. It overlaps and is integrated by two-color molding of a synthetic resin so that it protrudes from the outer surface of the piece 15 flush or from the outer surface, and overlaps and integrates with the outer surface of the side plate 1, the bottom piece 4, and the lid piece 15 made of hard synthetic resin of each hinge part. The non-slip portion 13 is formed by exposing the soft synthetic resin to a hexahedron box to the outside in the vicinity of one side or both sides adjacent to each other at right angles through the sides of the hexahedron to form the anti-slip portion 13. The hexahedron all It is characterized in that comprising disposed near the sides.

  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. Box A can be provided, and in addition to being compatible with a cardboard folding box in this way, it is made of synthetic resin, so it is strong, easy to clean, can be cleaned, and can be reused any number of times. In addition, the inner surface of each side plate 1 is not exposed to the outside in a state of being flatly folded and is not contaminated, and the stored items in the interior are not contaminated during reuse. In addition, in the folding box A made of synthetic resin that is compatible with the cardboard folding box as described above, the hand is easy to slip when held by both hands, but it is adjacent at right angles through the sides of the hexahedron. A non-slip portion 13 made of a soft synthetic resin exposed to the outside is provided in the vicinity of one or both sides of the surface to be folded, and the anti-slip portion 13 is provided in the vicinity of all sides of the hexahedron. It can be held securely and stably so that any side of the box A is gripped and held by hand, in particular, both ends of each hinge part made of soft synthetic resin are side plates 1 and bottom pieces made of hard synthetic resin. 4. Since the synthetic resin is overlapped and integrated by two-color molding so as to protrude from the outer surface of the lid piece 15 or flush with the outer surface, the soft synthetic resin overlapped and integrated on the outer surface by the two-color molding is used as the anti-slip portion 13. Of all sides of the hexahedron The non-slip part 13 made of soft synthetic resin with a relatively large area that can reliably prevent slipping of hands and fingers due to friction due to surface contact can be easily configured, and people with different hand and finger sizes and lengths However, no matter which side part of the hexahedron of the box is held with both hands, and even if the hand or finger is bent differently, the anti-slip part 13 will surely come into surface contact. Non-slip is made and can be surely prevented. In addition, when the synthetic resin folding box A is tied in a box shape, the string is easy to slip, but a non-slip portion 13 made of a soft synthetic resin is provided near all sides of the hexahedron. Therefore, the string can be prevented from slipping due to the line contact with the anti-slip portion 13 having a relatively large area, and the position where the string is bound and bound does not shift. In addition, although it is made of synthetic resin, even if it is stacked flatly in the state of being folded flatly for transportation and storage, it is more flexible than the synthetic resin folding box A between the upper and lower folded synthetic resin folding boxes A. The anti-slip portion 13 is present and anti-slip is made. As a result, the collapse of the synthetic resin folding box A is prevented from being collapsed even when stacked in a multi-stage state in a flat state. Even if they are stacked slightly shifted up and down in the folded state, or stacked in a different direction, the anti-slip portion 13 can surely prevent slipping and stable stacking can be achieved. Further, when the anti-slip portion 13 is positioned on the upper surface or the lower surface in a state of being assembled in a box shape, the anti-slip is made when stacked up and down in the state of being assembled in a box shape, and the collapse of the load can be prevented. .

  Further, the side plate connecting hinge portion 2 made of a soft synthetic resin for foldably connecting the side plates 1, the bottom piece connecting hinge portion 5 made of a soft synthetic resin for foldably connecting the side plate 1 and the bottom piece 4, the side plate 1 and the lid piece. 15 can be combined with each other as a non-slip portion 13, and the configuration is simplified, and the side plate 1, the bottom piece 4, and the lid piece made of a hard synthetic resin can be used. 15, the side plate connecting hinge portion 2, the bottom piece connecting hinge portion 5, and the lid piece connecting hinge portion 10 made of soft synthetic resin are integrally formed by two-color molding of synthetic resin, so that the side plate 1, the bottom piece 4, the lid The piece 15 and the side plate connecting hinge portion 2, the bottom piece connecting hinge portion 5, and the lid piece connecting hinge portion 10 that also serve as the anti-slip portion 13 are firmly integrated, and the anti-slip portion 13 becomes the side plate 1, the bottom piece 4, and the lid piece 15. Peel off In addition, the side plate connecting hinge portion 2, the bottom piece connecting hinge portion 5 and the lid piece connecting hinge portion 10 made of a soft synthetic resin are less likely to be damaged even when used repeatedly as compared with a thin hinge made of hard synthetic resin. Long life.

  Moreover, it is preferable that the strip | belt-shaped anti-slip | skid part 13 which consists of soft synthetic resins is provided along the full length or substantially full length of a side.

  By having such a configuration, when gripping a pair of opposite sides at the lower end with both hands in a box-shaped assembled state, a belt-like shape is formed regardless of which part of the pair of sides is held in the longitudinal direction. A hand can be pressed against any part of the non-slip portion 13 so as to be in a surface contact state, and can be securely gripped, and can be held so that the hand does not slip regardless of how it is held. . Further, when the string is hooked, the string is hung at the non-slip portion 13 so that the string does not slip regardless of the position in the longitudinal direction of the side. In addition, since the belt-like anti-slip portion 13 is provided along the entire length or substantially the entire length of the side, it is sure to be folded evenly when it is folded flatly or stacked in multiple stages in the form of a box. Can prevent slipping.

  Moreover, it is preferable that the part corresponding to the intermediate | middle part of the length direction of the side of the anti-slip | skid part 13 which consists of a soft synthetic resin provided along the full length or substantially full length of a side is wider than another part.

  With such a configuration, when gripping a pair of opposite sides at the lower end with both hands in a state of being assembled in a box shape, the slip stopper 13 of the soft synthetic resin is most commonly placed at the position where the hand is gripped. Since it is wide, the area where the hand is pressed against the anti-slip portion 13 in a surface contact state is increased, and the anti-slip portion 13 can be securely held and gripped, and the soft synthetic resin is expensive. However, the amount of expensive soft synthetic resin used can be reduced compared with the case where the anti-slip portion 13 is widened along the entire length of the side, and the cost can be reduced.

  Moreover, it is preferable to provide the non-slip | skid part 13 which consists of a soft synthetic resin exposed outside on the outer surface of the corner part of a hexahedron.

  In this way, by providing the anti-slip portion 13 made of the soft synthetic resin exposed to the outside on the outer surface of the hexahedral corner portion, as shown in FIG. 15, when holding the hexahedral corner portion by hand But you can definitely prevent your hands from slipping.

  Moreover, it is preferable to provide the anti-slip | skid part 13 in the vicinity of four sides of each outer surface of the four side plates 1, respectively.

  With such a configuration, the hand can be securely gripped without slipping no matter which part of the four sides of the four side plates 1 is placed.

  Further, a non-slip portion 13 made of a soft synthetic resin that is exposed outwardly over the entire length of the four sides of the outer surface of the side plate 1 and a non-slip portion made of a soft synthetic resin that is exposed to the outside at the corner portion of the outer surface of the side plate 1 are provided. The anti-slip portion 13 is formed in a square shape over the entire outer circumference of the outer surface of the side plate 1 by continuously providing the anti-slip portions 13 along the adjacent sides via the anti-slip portion 13 of the corner portion. It is preferable to do.

  By adopting such a configuration, it is possible to surely grip the four sides of the four side plates 1 and any part of each corner portion without slipping the hand, and each slip along the four sides. Since the stopper part 13 is continuously continuous at the corner part, the anti-slip part 13 can be reliably prevented from being twisted.

  Further, two box halves 12 are connected to form a folding box A, and the box half 12 is formed by two-color molding of a hard synthetic resin and a soft synthetic resin (a different material by a two-color molding method or a two-color molding machine). Two side plates 1 made of a hard synthetic resin, which are integrally formed by one side end by a side plate connecting hinge portion 2 made of a soft synthetic resin, and the above 1 or 2 The bottom piece 4 continuously integrated from the lower side of the one side plate 1 via the bottom piece connecting hinge portion 5 made of soft synthetic resin, and the lid piece connecting hinge portion 10 made of soft synthetic resin from the upper side of the one or two side plates 1. The other side end of the two side plates 1 of the other box half 12 is foldably connected to the other side end of the two side plates 1 of the one half box 12. And the rectangular tubular side wall constituting portion 3 composed of the four side plates 1 Form, by a bottom piece 4 provided on the two boxes half 12 constitutes a bottom plate component 6, it is preferable to form the cover component 7 by a cover piece 15 provided in the two boxes half 12.

  With such a configuration, two box halves 12 in which the side plate 1, the bottom piece 4, the lid piece 15 made of hard synthetic resin and the hinge portion made of soft synthetic resin are integrally formed by two-color molding of synthetic resin are provided. By combining and connecting, the folding box A made of the synthetic resin of the present invention can be formed, the mold for forming the folding box A made of the synthetic resin can be reduced in size, and the manufacturing cost can be reduced.

  The present invention is compatible with corrugated cardboard folding boxes, but has stronger strength than corrugated cardboard, is easy to remove dirt, can be washed, can be reused any number of times, and can be used in a flat folded state. Non-slip part made of a soft synthetic resin with a relatively large area that does not get dirty on the inner surface and can reliably prevent slipping by friction caused by surface contact with the hands and fingers in the vicinity of all sides of the hexahedron. It can be formed with a simple structure, and it can be held securely and securely without slipping even if it is grasped by hand, and it will not slip due to line contact when hanging a string. It is a plastic plastic folding box that can be securely and stably strapped, but when it is folded flat and stacked in a box shape in multiple layers, it is made of soft synthetic resin. By stop Indeed it can slip can be stacked stably, the collapsing can be prevented.

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

  The folding box A made of synthetic resin of the present invention is mainly composed of a rectangular tubular side wall constituting portion 3, a bottom plate constituting portion 6, and a lid constituting portion 7.

  As shown in FIGS. 1 to 3, the rectangular tubular side wall constituting portion 3 is made of soft synthetic resin at adjacent side end portions of the four side plates 1 made of hard synthetic resin constituting the front, rear, left and right side surfaces. The side plate connecting hinge portion 2 is configured to be foldably connected, and this rectangular tubular side wall constituting portion 3 is rectangular or square in plan view when assembled in a box shape, and as shown in FIG. 9 when folded. 5 and FIG. 8 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. It is configured so that it can be folded. 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.

  Further, as shown in FIGS. 2 and 4, the bottom plate of the four hard synthetic resins constituting the front, rear, left and right side surfaces is rigidly integrated with a bottom piece connecting hinge portion 5 made of soft synthetic resin. A bottom piece 4 made of synthetic resin is connected so as to be foldable, and the bottom piece 4 made of hard synthetic resin constitutes a bottom plate constituting portion 6 made of synthetic resin. 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. As shown in FIG. 8, it is folded so as to overlap the inner surface of the side plate 1.

  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. 8, 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.

  Further, as shown in FIG. 12, 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, and the upper surface of the corner connecting portion 30 is formed. 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 made of a soft synthetic resin inclined at 45 ° in the form.

  Then, as shown in FIG. 10, 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 via 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 a hard synthetic resin is foldably connected to the upper side of the side plate 1 made of a plurality of hard synthetic resins via a lid piece connecting hinge portion 10 made of a soft synthetic resin, and assembled into a box shape. Thus, the lid constituting part 7 is formed as a lid which is the upper surface of the box.

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

  The folding box A made of a synthetic resin provided with the square tubular side wall constituting part 3, the bottom plate constituting part 6 and the lid constituting part 7 as described above is a hexahedral box when assembled in a box shape. In the present invention, a non-slip portion 13 made of a soft synthetic resin is provided outside in the vicinity of all the sides (eight sides) of the hexahedron of the folding box A mainly composed of this hard synthetic resin. Further, the non-slip portion 13 made of the soft synthetic resin is made of the soft synthetic resin for connecting 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, respectively. The side plate connecting hinge part 2, the bottom piece connecting hinge part 5, the inclined hinge part 9, the side piece 1 of the cover piece connecting hinge part 10, the bottom piece 4, the overlapping piece 11, and the overlapping piece on the outer surface of the lid piece 15 There is a feature. In other words, the side plate 1, the bottom piece 4, the overlapping piece 11, the overlapping piece 11 and the outer surface of the lid piece 15 which are made of soft synthetic resin overlap with the outer surface to form the anti-slip portion 13. Further, the anti-slip portion 13 having a sufficient area for making contact with a hand or a finger and preventing slip by friction can be formed.

  In the embodiment shown in the accompanying drawings, as described above, a non-slip portion made of a soft synthetic resin in the form of a band along the entire length of each side in the vicinity of four sides on the top, bottom, left and right of the outer surface of the four side plates 1 constituting the four side surfaces. 13 is provided, and a non-slip portion 13 made of a soft synthetic resin that is exposed to the outside is provided on the outer surface of the corner portion of each side plate 1, and along the adjacent side through the non-slip portion 13 of the corner portion. The anti-slip portion 13 is formed in a square shape over the entire outer circumference of the outer surface of the side plate 1 by continuously connecting the anti-slip portion 13 together. Furthermore, the belt-like non-slip portion 13 provided along the entire length or substantially the entire length of the lower side of each side plate 1 has a wide anti-slip portion 13a in which the portion corresponding to the middle portion in the length direction of the side is wider than the other portions. It has become. Further, a non-slip portion 13 made of a strip-like soft synthetic resin is provided in the vicinity of the side on the side adjacent to the side plate 1 of the outer surface (lower surface) of each bottom piece 4, and the outer surface ( A non-slip portion 13 made of a strip-like soft synthetic resin is provided along the side in the vicinity of the side on the side adjacent to the side plate 1 on the upper surface.

  Here, when the non-slip portion 13 made of a soft synthetic resin is provided on the outer surfaces of the side plate 1, the bottom piece 4, and the lid piece 15 so as to be exposed to the outside, in the embodiment shown in the accompanying drawings, in the side plate 1 and the lid piece 15, Each of the anti-slip portions 13 protrudes outward from the outer surface, so that the anti-slip effect and the buffering effect can be further exhibited. Further, the bottom piece 4 has an anti-slip portion 13 exposed on the outer surface, but a step surface is formed on the outer surface of the bottom piece 4 made of a hard synthetic resin, and the anti-slip portion 13 is exposed on the step surface. Although it is located at a position slightly shifted from the lowermost end, the non-slip portion 13 provided so as to be exposed to the outer surface of the bottom piece 4 also protrudes downward (outward) from the outer surface of the bottom piece 4. May be provided. Further, the anti-slip portion 13 may be flush with the outer surfaces of the side plate 1, the bottom piece 4, and the lid piece 15 in all or part of the side plate 1, the bottom piece 4, and the lid piece 15.

  In the embodiment shown in the attached drawings, the synthetic resin folding box A having the above-described configuration is formed by combining two box halves 12 as shown in FIGS. 12 and 13 formed by synthetic resin integral molding. It is.

  As shown in the developed views of FIGS. 12 and 13, 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 connecting hinge part 5, the inclined hinge part 9, the lid piece connecting hinge part 10, and the belt member 34 are connected to the connecting hinge part 10 so as to be foldable. PE (elastomer), LDPE (low density polyethylene), it is molded by a soft resin such as EVA (ethylene-vinyl acetate).

  In order to integrally form the box half body 12 by two-color injection molding of synthetic resin, for example, an injection mold apparatus 40 as shown in FIG. 16 is used, and the box half body 12 is molded in the order of FIGS. is there.

  An injection mold apparatus 40 shown in FIG. 16 includes a slide core 42 provided in a mold portion 41 that can be moved forward and backward, a first gate 44 for injecting a hard synthetic resin 43, and a soft synthetic resin 45. And a second gate 46 for injecting.

  As the mold part 41, there are a fixed mold part 41a and a movable mold part 41b. A recess 49 is provided on a surface of the movable mold part 41b facing the fixed mold part 41a. The slide core 42 is housed in such a manner that it can be moved forward and backward (in FIG. 16, arrow A indicates the forward direction and arrow B indicates the backward direction).

  In the present invention, the movable mold part 41b is movable in the horizontal direction (horizontal direction) or the vertical direction (vertical direction) with respect to the fixed mold part 41a, and by moving the movable mold part 41b. The mold is closed and the mold is opened. Further, the slide core 42 is movable in the same direction as the movable direction of the movable mold part 41b with respect to the movable mold part 41b.

  The fixed mold part 41a and the movable mold part 41b are closed and the slide core 42 is advanced, and the fixed mold part 41a, the movable mold part 41b, and the advanced slide core 42 are surrounded. This space is formed as a primary injection molding cavity 47. As the primary injection molding cavity 47, two independent side plate molding cavities 47a and 47b, two bottom piece molding cavities 47c and 47d, and two lid piece moldings as shown in FIG. There are cavity portions 47e and 47f, one overlapping molding piece cavity portion 47g, one connection portion molding cavity portion 47h, and one lock member molding cavity portion 47i, and each of these primary injection molding cavities. The portions 47 are formed at the same distance as the width of adjacent primary injection molding cavities 47 that become hinge portions.

  As shown in FIG. 16, the slide core 42 spans between the ends of the adjacent primary injection molding cavities 47 formed at the above-mentioned distances, and the center portion of the front surface of the slide core 42 is fixed. The mold 41a faces the portion 41a1 between the ends of the primary injection molding cavity 47 and both sides of the front surface of the slide core 42 are inner surfaces on one side of the ends of the primary injection cavity 47, respectively. Is configured.

  The plurality of primary injection cavity portions 47 are formed by providing a plurality of cavity forming concave portions 48 on one or both of the opposing surfaces of the fixed mold portion 41a to the movable mold portion 41b. In the embodiment of the attached drawings, an example is shown in which a plurality of cavity forming recesses 48 are formed in the fixed mold part 41a.

  Further, by retracting only the slide core 42 in a state where the fixed mold part 41a and the movable mold part 41b are closed, each primary injection molding cavity 47 (side plate molding cavities 47a and 47b, bottom piece molding). Cavity portions 47c and 47d, lid piece forming cavities 47e and 47f, overlapping piece forming cavities 47g, connecting portion forming cavities 47h, and lock member forming cavities 47i). End portions of the outer surfaces of the molded portions (side plates 1a, 1b, bottom pieces 4a, 4b, lid pieces 15a, 15b, connection portions 18, stoppers 35) are exposed, and the exposed surfaces of the respective hard synthetic resin molded portions A space to be a secondary injection molding cavity 50 surrounded by the mold part 41 and the slide core 42 is formed.

  The first gate 44 and the second gate 46 are respectively provided in the fixed mold part 41a, and at least one first gate 44 is provided for each primary injection molding cavity part 47. The second gates 46 are provided between the adjacent primary injection molding cavities 47 of the fixed mold part 41a, and the mold part 41 is closed and the slide core 42 is advanced while the slide core 42 is advanced. The front end surface comes into contact with the second gate 46 and closes. The mold part 41 is closed and the slide core 42 is retracted to form the secondary injection molding cavity part 50. The gate 46 is configured to open into the secondary injection molding cavity 50.

  The box half body 12 is molded using the injection mold apparatus 40 as described above as follows.

  First, as shown in FIG. 16, the plurality of mold parts 41 are closed and the slide core 42 is advanced to form a plurality of primary injection molding cavities 47. As shown in FIG. 17, the hard synthetic resin 43 is injected from the first gate 44 by primary injection molding, and the side plates 1a and 1b, the bottom pieces 4a and 4b, the cover pieces 15a and 15b, the overlapping pieces 11, the connection portions 18, and the stoppers. A primary injection process for forming the tool 35 is performed.

  Next, as shown in FIG. 18, the slide core 42 is retracted while the mold parts 41 are closed, and the side plates 1a, 1b, bottom pieces 4a, 4b, lid pieces 15a, 15b, overlapping pieces 11, A plurality of secondary injection molding cavities 50 surrounded by the exposed surface, the retracted slide core 42, and the mold part 41 are exposed at the ends of the outer surfaces of the connecting part 18 and the stopper 35. Form.

  Next, as shown in FIG. 19, the soft synthetic resin 45 is injected from the second gate 46 by the secondary injection molding into the secondary injection molding cavity 50 formed as described above, and the side plate connecting hinge portion 2a. 2b, bottom piece connecting hinge part 5, inclined hinge part 9, lid piece connecting hinge part 10 and band material 34 are formed, and both end parts of side plate connecting hinge part 2a are respectively attached to the outer end surfaces of side plates 1a and 1b adjacent to each other. Overlapping and integrating, both end portions of the side plate connecting hinge portion 2b are respectively overlapped and integrated with the outer surface of the other end portion of the side plate 1b and the outer surface of the connecting portion 18, and both end portions of each bottom piece connecting hinge portion 5 are respectively connected to the end portion outer surface of the side plate 1. It overlaps and integrates with the end outer surface of the bottom piece 4, and both ends of the inclined hinge portion 9 overlap and integrate with the end outer surface of the bottom piece 4 and the end outer surface of the overlap piece 11, respectively. Each end of the side plate 1 Duplicate integrated with the end portion outer surface of the face and the lid piece 15 overlaps integrating both end portions of the strip 34 to the outer surface of the end portion outer surface and the attachment 35 of the lid pieces 15a, respectively.

  After the secondary injection molding is performed as described above, a mold release process is performed in which the mold apparatus for injection molding 40 is opened to take out the box half body 12 as shown in FIGS.

  A series of steps from the series of mold closing in the injection molding die device 40 to the primary injection molding, the secondary injection molding, and the mold release process are executed under the control of a control unit (not shown).

  As described above, the hard synthetic resin is subjected to primary injection molding to form the side plate 1, the bottom piece 4, the overlapping piece 11, the lid piece 15, and the stopper 35, and then the soft synthetic resin is subjected to secondary injection molding in the same mold. 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 strip 34 are respectively connected to the side plate 1, the bottom piece 4, the overlapping piece 11, and the lid made of soft synthetic resin. By overlapping and integrating on the outer surface side of the piece 15 and the stopper 35, the side plate connecting hinge part 2, the bottom piece connecting hinge part 5, the inclined hinge part 9, the lid piece connecting hinge part 10, and the strip 34 made of the soft synthetic resin. Both end portions of the side plate 1, the bottom piece 4, the overlapping piece 11, the lid piece 15, and the stopper 35 can be provided so as to be exposed outward. Thereby, the folding box A made of synthetic resin, the main body of which is constituted by the rectangular tubular side wall constituting part 3, the bottom plate constituting part 6 and the lid constituting part 7, is assembled in a box shape, that is, in a state of constituting a hexahedral box, On the outer surface of each side plate 1, bottom piece 4, and lid piece 15 constituting each face of the hexahedron, in the vicinity of four sides in the side plate 1, in the vicinity of the side adjacent to the side plate 1 in the bottom piece 4, in the side piece in the lid piece 15 In the vicinity of the side adjacent to 1, the overlapping and integrated portions of the end portions of the side plate connecting hinge part 2, the bottom piece connecting hinge part 5, and the lid piece connecting hinge part 10 made of soft synthetic resin are exposed. It can be used as the anti-slip portion 13 of the synthetic resin portion, and the size is such that the anti-slip portion 13 is formed in a band shape and can be surely brought into surface contact when it is put on a hand or a finger. it can.

  Using two box half bodies 12 integrally molded by two-color molding injecting hard synthetic resin and soft synthetic resin in the same mold as described above, the side end of one side plate 1a of one box half body 12 is used. The connecting portion 18 provided at the tip of the other side plate connecting hinge portion 2b provided at the side end of the other side plate 1b of the other box half 12 is overlapped with the overlapping margin absorbing protrusion 8 provided in the connecting means. In the same manner, the 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 overlapping margin absorbing protrusion 8 of the other box half 12. 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 A, the corners of the pair of diagonal parts that are folded to form 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 A, 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 A 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. Of course, in the present invention, the two box halves 12 for combining and forming the folding boxes A made of synthetic resin may not have the same shape, and two box halves having different shapes molded by different molding dies. A synthetic resin folding box A may be formed by combining and bonding the bodies 12.

  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. 12 and 13, an engagement portion 16 a is provided on the overlapping allowance absorption projection 8 and the engaged portion 16 b is provided on the side plate connection hinge portion 2 b (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. 10, 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 A 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 cylindrical 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 A made of synthetic resin, and then the lid piece 15 is tilted to close the upper opening of the folding box A as shown in FIG. In this case, in the corner portion of the folding box A, the corner portion formed by the base portion of the end portion of the upper cover piece 15a integrally connecting the corner portion formed by the upper end of the overlapping margin absorbing projection 8 and the upper end of the side plate 1a. 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.

  The box is assembled as described above, the stored items are stored inside, and the folding box A is grasped and carried by the hand with the upper opening closed by the lid piece 15. When the folding box A is held by hand in the state of being assembled into a box shape as described above, usually, as in the case of a cardboard folding box, as shown in FIG. In this case, since the non-slip portion 13 made of a soft synthetic resin is provided in the vicinity of the side, both hands grasp the non-slip portion 13 made of the soft synthetic resin in the vicinity of the side. As a result, the folding box A can be held securely and stably without slipping. In this way, when gripping a pair of opposite sides of the lower end with both hands, it is usually to grasp the substantially central portion in the longitudinal direction of the side, but the portion corresponding to the intermediate portion in the length direction of each side of the lower end is the other Since the wide anti-slip portion 13a is wider than the portion, the wide anti-slip portion 13a is gripped by hand, so that it can be more securely held by hand, and two opposing side plates 1 facing each other. Whichever of the pair of side plates 1 is gripped by both hands, the wide anti-slip portion 13a is gripped by hand.

  Further, when the folding box A is held with both hands in a normal manner as shown in FIG. 14, the non-slip part 13 provided with the arms of the operator holding the folding box A near the left and right sides of the upper end. The anti-slip is also made in this part, and the anti-slip part 13 provided in the vicinity of the upper and lower sides of the folding box A facing the worker's abdomen hits the operator's abdomen to prevent the slip. Thus, the folding box A can be held stably.

  Moreover, even if it is the attitude | position which becomes the lower surface among the six surfaces of the folding box A (that is, in various attitude | positions where the front and back of the folding box A, right and left are reversed, and up and down are reversed) In the present invention, if a pair of opposite sides of the lower end is held with both hands so as to hold the whole as described above, in the present invention, a slip made of a soft synthetic resin is provided in the vicinity of all sides of the hexahedron. Since the stop portion 13 is provided, it can be held securely and stably without slipping in the same manner as described above.

  Here, in the present invention, in a state where the folding box A is assembled in a box shape, as shown in FIGS. 1 and 2, in the corner portion where the three surfaces of the hexahedron intersect, the three surfaces constituting the corner portion are included. An anti-slip portion 13 made of a soft synthetic resin is provided on the outer surface of a portion adjacent to the corner so as to be exposed to the outside. In order to provide the anti-slip portion 13 at the corner portion, the anti-slip portion 13 is formed along the entire length of the edge of the side plate 1, the bottom piece 4, and the cover piece 15 along each side of the hexahedron. By configuring the stop portion 13 to reach the hexahedral corner portion, the anti-slip portion 13 can be provided at the corner portion. In the above example, in the corner portion where three faces of the hexahedron intersect, an anti-slip portion 13 made of a soft synthetic resin is provided on the outer surface of a portion adjacent to the three-surface corner constituting the corner portion so as to be exposed to the outside. However, the non-slip portion 13 made of a soft synthetic resin may be provided on the outer surface of a portion adjacent to one or two of the three surfaces constituting the corner portion so as to be exposed to the outside.

  In providing the anti-slip portion 13 at the corner portion of the hexahedron, the anti-slip portions 13 along the adjacent sides of the side plate 1 are connected to each other via the anti-slip portion 13 provided on the outer surface of the corner portion of the side plate 1 as described above. When the non-slip portion 13 is formed in a square shape over the entire length of the four outer circumferences of the side plate 1 in a continuous manner, the anti-slip portions 13 provided on the outer surface along each side of the side plate 1 are integrally The anti-slip portion 13 can be configured so as not to peel off.

  Further, as in the embodiment shown in the accompanying drawings, when the anti-slip portion 13 is provided over the entire length of the four sides of each side plate 1 and the anti-slip portion 13 that is continuous in a square shape is formed on the outer periphery of each side plate 1. Since the square-shaped corner is located at the hexahedral corner, the anti-slip portion 13 can be reliably provided at the hexahedral corner, and the hexahedral corner can be grasped by hand as shown in FIG. Even if you hold it in, you can be sure that your hand will not slip.

  Thus, when holding the folding box A with both hands, as described above, not only has the pair of opposite sides of the lower end held by both hands so as to hold the whole, but also any different sides of the 12 sides of the hexahedron If you hold it with both hands, or if you hold the hexahedral corner part with your hand, you will be able to hold the anti-slip part 13 with your hand, so that it will not slip and will be easy to hold.

  In addition, when the folding boxes A are transported and stored in a state of being assembled in a box shape, the folding boxes A are stacked in multiple stages. Here, as in the above-described embodiment, by providing the non-slip portion 13 made of a soft synthetic resin in the vicinity of the side of the side plate 1 on the outer surface of the bottom piece 4 or the lid piece 15, the upper folding box can be stacked even when stacked in the upper and lower stages. It is possible to prevent A from slipping and collapsing with respect to the lower folding box A. Further, when the folding box A is directly placed on a pallet or a conveyor, the slip is prevented. Furthermore, when it puts in the freezer compartment, even if the surfaces of the freezer compartment floor and pallets are frozen, the folding box A is difficult to slip. Further, when placed in the freezer compartment, the anti-slip portion 13 provided on the outer surface is made of a soft synthetic resin, so that it is hard to become hard even at a low temperature and retains softness. effective.

  In addition, when folding boxes A whose upper openings are closed with lid pieces 15 are stacked up and down in a multi-stage manner with the stored items stored in the box shape, the load from above is applied to the corner portion of the lower folding box A. However, as described above, the side plate 1 in which the upper end of the overlap allowance absorbing protrusion 8 and the overlap allowance absorbing protrusion 8 are provided in a projecting manner is transmitted. The corner portion formed with the upper end of the lid is integrally connected by the corner connecting portion 30, and a part of the lid piece 15 is placed and supported in a state where the upper surface of the corner connecting portion 30 is assembled into a box shape and the lid piece 15 is closed. Therefore, the lid piece 15 is securely supported by the corner portion and does not bend so as to sink downward. Thereby, even if folding boxes A are stacked up and down in multiple stages, they can be stably stacked without collapsing.

  On the other hand, when not in use, the assembled state in which the rectangular tubular side wall constituting portion 3 composed of the four side plates 1 is rectangular or square in plan view as shown in FIGS. 1, 2, 3, and 4. From FIG. 9, the rectangular side wall constituting portion 3 composed of the four side plates 1 is folded so as to be a substantially parallelogram, so that the opposing side plates 1 are almost as shown in FIGS. 7 and 8. The bottom piece 4 can be folded in a flat state, that is, in parallel and 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.

  When the folding box A is folded flat and stacked in multiple stages as shown in FIG. 11, 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 A are overlapped, so that the hard synthetic resin side plate 1 does not directly overlap the hard constituent resin side plate 1 and is not easily stacked. In addition, since the non-slip portion 13 made of a soft synthetic resin is brought into contact with the top and bottom to prevent slipping, the upper folding box A is not accurately stacked on the lower folding box A and is stacked 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, as shown in FIG. 5, the folding box A made of synthetic resin of the present invention is folded so that the square tubular side wall constituting portion 3 composed of the four side plates 1 becomes a substantially parallelogram. The inner surface of the side plate 1 is not exposed, and the bottom piece 4 is folded along the inner surface of the side plate 1 and interposed between the side plates 1 so that it is not exposed to the outside. When the inner surfaces overlap each other, the exposed portion of the inner surface is small. Therefore, the inner surface of the folded folding box A is exposed to the outside and becomes dirty, or when the folding box A is stacked many times up and down, It is possible to prevent the outer surface of another folding box A from coming into contact with the inner surface and get dirty, and in this way, the inner surface portion into which the stored item is put is not dirty, which is advantageous for repeated use.

  In the present invention, since the folding box A is made of a synthetic resin, it is strong, durable, stain resistant, and can be washed, so it can be reused many times, and is economical and saves resources. 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.

  The folding box A made of a synthetic resin according to 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 lid piece connecting hinge part 10 partially 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 part such as a synthetic resin folding box A, the hinge part made of soft synthetic resin comes into contact with the placing part, and the hinge part 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.

  In the present invention, when a transparent or translucent resin is used as the hard synthetic resin for molding the side plate 1, the bottom piece 4, and the lid piece 15, the presence / absence and amount of contents in the folding box A are visually recognized from the outside. Can do. In this case, it is preferable that at least the pair of side plates 1 be transparent or translucent. Of course, all the side plates 1 may be molded from a transparent or translucent hard synthetic resin, and in addition to the side plates 1, the bottom piece 4 and the lid piece 15 may also be molded from a transparent or translucent hard synthetic resin. Good. In the case of being transparent and translucent, it may be colored and translucent.

  If a soft synthetic resin having a different color from the hard synthetic resin is used as the soft synthetic resin for molding the anti-slip portion 13 and the hinge portion, the hard synthetic resin portion and the soft synthetic resin portion are color-coded to improve the appearance. In this case, if a soft synthetic resin with a bright color that is easy to see even in a dark place is used, the hexahedron side position is easy to understand in a dark place, and the outline of the hexahedron can be visually recognized, and the hexahedron side part can be grasped and held by hand Also, when moving in a dark place, the outline of the hexahedron can be visually recognized, so that it can be prevented from hitting other objects.

  Further, in the embodiment shown in the accompanying drawings, the wavy vertical ribs 21 are formed leaving a flat surface portion that overlaps and integrates at least the anti-slip portion 13 (side end portion of the hinge portion) made of a soft synthetic resin on the outer peripheral portion of the side plate 1. Although it is provided to prevent deformation of the side plate 1 due to a load from above, and to prevent damage when another object collides, it is not limited to the corrugated vertical rib 21 as shown in the figure, Other shapes may be used as long as they are ribs. A rib may be provided not only on the side plate 1 but also on the bottom piece 4 and the lid piece 15.

  In the embodiment shown in the accompanying drawings, an example of a so-called bottom lock type synthetic resin folding box A in which each bottom piece 4 is folded so as to overlap the inner surface of each side plate 1 in a flatly folded state. Although explained, when the synthetic resin folding box A is folded flat, the bottom piece 4 may be of a type that extends so as to be substantially flush with the side plate 1.

It is the perspective view seen from the state of the state which assembled the folding box made from the synthetic resin of this invention 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 a perspective view of the folded state same as the above. It is sectional drawing of the XX line of FIG. 3 same as the above. It is sectional drawing of the YY line | wire of FIG. 3 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 table | surface which shows the molding state of a box half body same as the above. It is the perspective view seen from the back which shows the molding state of a box half body same as the above. It is a front view which shows an example which has a folding box same as the above. It is a perspective view which shows the other example which has the folding box same as the above by hand. FIG. 14 is a cross-sectional view of a mold closing state of an injection mold apparatus for two-color molding of the synthetic resin box half shown in FIGS. 12 and 13. It is sectional drawing of the injection mold apparatus of the state which filled the hard synthetic resin by the primary injection molding in the primary injection molding cavity part same as the above, and shape | molded the main-body part and the lock member. It is sectional drawing of the injection mold apparatus of the stage which formed the cavity part for secondary injection molding same as the above. It is sectional drawing of the injection mold apparatus of the stage which filled the soft synthetic resin by secondary injection molding to the cavity part for secondary injection molding same as the above, and shape | molded the hinge part and the strip | belt material. It is explanatory drawing which shows the arrangement | positioning relationship of the several cavity part for primary injection molding 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 6 Bottom plate component part 7 Cover component part 10 Cover piece connection hinge part 13 Anti-slip part 15 Cover piece A Folding box

Claims (7)

In a state where the adjacent side end portions of the four side plates made of hard synthetic resin constituting the front, rear, left and right side surfaces are connected to each other in a foldable manner at the side plate connecting hinge portion and assembled into a box shape, it becomes a rectangular shape or a square in plan view. In addition, when folded, the corners of a pair of diagonal portions are acute and the corners of the other pair of diagonal portions are obtuse, so that they can be folded flatly after being folded into a substantially parallelogram. The bottom plate which becomes the bottom of the box in a state of being assembled into a box shape formed by connecting a bottom piece made of a hard synthetic resin to a lower side of a plurality of side plates via a bottom piece connecting hinge part so as to be foldable. A lid that is a lid that is an upper surface of the box in a state of being assembled in a box shape that is configured by foldably connecting a lid made of hard synthetic resin to the upper side of the component part and a plurality of side plates via a lid piece connecting hinge part Component A folding box made of synthetic resin as the box hexahedron are put together in a box shape with,
The side plate connecting hinge part, the bottom piece connecting hinge part, and the lid piece connecting hinge part are made of soft synthetic resin, and both end portions of the hinge parts are made of hard synthetic resin. The soft synthetic resin that is overlapped and integrated by the two-color molding of the synthetic resin so as to protrude from the side, and that is integrated with the outer surface of the side plate, the bottom piece, and the lid piece made of the hard synthetic resin of each hinge part was assembled into a hexahedral box. In the state, it is exposed to the outside in the vicinity of one or both sides adjacent to each other at right angles through the sides of the hexahedron to form a non-slip portion, and the anti-slip portion is provided in the vicinity of all sides of the hexahedron. A folding box made of synthetic resin.   2. A synthetic resin folding box according to claim 1, wherein a strip-shaped anti-slip portion made of a soft synthetic resin is provided along the entire length or substantially the entire length of the side.   The portion corresponding to the intermediate portion in the length direction of the side of the anti-slip portion made of a soft synthetic resin provided along the entire length or substantially the entire length of the side is wider than the other portions. A folding box made of synthetic resin according to claim 1 or 2.   The synthetic resin folding box according to any one of claims 1 to 3, wherein a non-slip portion made of a soft synthetic resin exposed outward is provided on an outer surface of a hexahedral corner portion.   The synthetic resin folding box according to any one of claims 1 to 4, wherein an anti-slip portion is provided in the vicinity of four sides of each outer surface of the four side plates.   A corner portion provided with a non-slip portion made of a soft synthetic resin exposed outwardly over the entire length of the four sides of the outer surface of the side plate and a corner portion on the outer surface of the side plate provided with a non-slip portion made of a soft synthetic resin exposed outward The anti-slip portion formed in a letter-L shape over the entire outer circumference of the outer surface of the side plate is formed by continuously connecting the anti-slip portions along adjacent sides through the non-slip portion. 5. A folding box made of synthetic resin according to 5.   Two box halves are connected to form a folding box, and the box halves are integrally formed by two-color molding of a hard synthetic resin and a soft synthetic resin, and a side plate connecting hinge portion made of a soft synthetic resin Two side plates made of a hard synthetic resin that are integrally connected to each other by one side, a bottom piece that is integrally continuous from the lower side of the one or two side plates via a bottom piece connecting hinge portion made of a soft synthetic resin, and the above 1 Or a lid piece integrally connected from the upper side of the two side plates via a lid piece connecting hinge portion made of a soft synthetic resin, and the other box half on the other side end of the two side plates of one box half The other side end portions of the two side plates are foldably connected to form a square cylindrical side wall constituting portion consisting of four side plates, and a bottom plate constituting portion is constituted by bottom pieces provided on two box halves. The lid component is composed of lid pieces provided on the box half. Synthetic resin folding box according to claim 6, wherein.

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