JP2008239223A - Packaging container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container for packaging that can be held in a folded-in-half condition when a flap portion is folded in either direction, and can fold the flap portion with a smaller force, and can be used by any person. <P>SOLUTION: The packaging container 1 has right and left standing plates 4a and 4b provided to be stood between a bottom plate 2 and a top plate 3. Along the central line in the width direction passing through the bottom plate 2 and the top plate 3, a folding line 21 is provided to the bottom plate 2, and a zipper 31 is provided to the top plate 3, respectively. The container 1 can be symmetrically folded in half, the left and right, along the folding line 21, by breaking the zipper 31. The bottom plate 2 has a pair of cutting lines 61a and 61b that are intersecting with the folding line 21 and approach toward each other as it departing from the folding line 21. The container 1 is folded half along the folding line, and a flap portion 73, which lies within the pair of cutting line, is folded to either direction to hold the container in the folded-in-half condition. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a packaging container for containing confectionery and the like, and more particularly to a packaging container that can be used by being folded in the middle.

  Conventionally, a carton for storing and selling confectionery or the like, that is, a packaging container, is provided with a zipper, and can be easily opened by breaking the zipper, and is provided on a wall surface facing the zipper in the packaging container. There are known ones that are folded in two at the fold line. Patent Document 1 discloses such a two-fold packaging container.

  In addition, among the two-fold packaging containers, the zipper and the folding line are positioned on the center line in the width direction of the packaging container, so that the left and right boxes have the same size when folded in two, There are some that can be used conveniently at parties, etc. by using a part that was a side wall as the bottom and a box with an open top on the table. Patent Document 2 discloses such a bilateral folding type packaging container.

  By the way, in the two-fold packaging container as described above, since the restoring force of the paper works at the fold line portion, the folded state cannot be maintained unless force is always applied. Therefore, as disclosed in Patent Documents 1 and 2, various devices for maintaining the folded state are made.

  Patent Document 1 has two substantially parallel opening fixing break lines intersecting with the folding line, and the two opening fixing breaking lines are parallel lines on one side of the folding line, and on the other side. Has disclosed so-called divergent packaging containers that move away from each other as they move away from the fold line. Such an opening fixing break line portion of the packaging container 101 is shown in FIGS. 10A and 10B as an unfolded state and a state where the packaging container is folded in half. According to this packaging container 101, a zipper (not shown) is broken, the packaging container 101 is folded in two via a folding line 102, and then sandwiched between two fixing breaking lines 103a and 103b. The portion 104 sandwiched between the two fixing break lines by pushing down the flap-shaped portion 104 to the side S2 parallel to the side S1 where the fixing breaking line is divergent. The flap-shaped portion 104a having a trapezoid shape on one side is frictionally engaged with the rectangular portion 105b having a rectangular shape on the other side, and the packaging container 101 is held in a folded state.

  Patent Documents 1 and 2 have two opening fixing break lines that are substantially parallel to the folding line, and the two opening fixing breaking lines are parallel lines on one side of the folding line. On the other hand, there is disclosed a symmetric arcuate packaging container that is once separated from each other as it goes away from the fold line and that approaches again in a part away from the fold line for a certain distance. The opening fixing break line portion of the packaging container 201 is shown in FIGS. 11A and 11B as an unfolded state and a state where the packaging container is folded in half.

  According to the packaging container, after the zipper is broken and the packaging container 201 is folded in two via the folding line 202, the flap-shaped container is formed between two fixing breaking lines 203a and 203b. By fixing the portion 204 from the side S3 where the fixing breaking line is arcuate to the side S4 where the fixing breaking line is parallel, the fixed portion of the flap-shaped portion 204 sandwiched between the two fixing breaking lines is fixed. The convex portion 204c formed by the arc-shaped fixing breaking line on the side 204a where the breaking line for arc is formed is locked beyond the rectangular frame portion 205b on the other side, and the packaging container Is held in a folded state.

JP 2006-225007 A Japanese Patent Application Laid-Open No. 08-026342

  However, in the packaging containers 101 and 201 described above, after the packaging container is folded in half, the flap-shaped portions 104 and 204 formed by the opening fixing breaking lines 103a, 103b, 203a, and 203b are always in one direction. If it is not tilted down, the folded state cannot be maintained, and if it is tilted in the other direction, such an effect cannot be obtained. In particular, for bi-fold packaging containers that are bilaterally symmetric, the user may touch the container from either side, so that the same effect can be obtained regardless of which side the container is tilted to. Was desired.

  In the packaging container described above, when the flap-shaped portions 104 and 204 are folded down, the frictional force generated between the side edge of the flap-shaped portion 104 and the frame portion 105b or the convex portion 204c is the other. It must be pushed down against the deformation force required when crossing the rectangular part 205b on the side, that is, both require a certain amount of force.

  For this reason, people who come into contact with such packaging containers for the first time need to think to understand the mechanism, and it is difficult to use for old people and children with weak power. There was a problem that it was not for.

  The present invention has been made in view of the above problems, and can hold the container in a folded state when the flap-shaped portion is tilted in either direction, and the flap can be operated with a smaller force. It is an object of the present invention to provide a packaging container that is easy to use for everyone, and that can collapse the shaped part.

  In order to achieve the above object, the packaging container of the present invention has a bottom plate, a top plate, and a left and right upright plate provided between the bottom plate and the top plate, on the center line in the width direction passing through the bottom plate and the top plate. In addition, a fold line is provided on the bottom plate, a zipper is provided on the top plate, and the zipper is broken so that the container can be folded in two symmetrically via the fold line, and the bottom plate intersects the fold line. A pair of cut lines formed so as to approach each other as they move away from the fold line, the packaging container is folded in two via the fold line, and a flap-shaped portion sandwiched between the pair of cut lines is arbitrarily It is characterized in that the folded state is maintained by folding it in one direction.

  Each of the pair of cut lines may have one curved portion at a point-symmetrical position.

  The pair of score lines may be line symmetric via a fold line.

  The cut line may have a curved portion on both sides of the fold line and at a position that is not line symmetric via the fold line.

  According to the packaging container of the present invention, the flap-shaped portion defined by the pair of cut lines formed so as to approach each other as the pair of cut lines move away from the fold line is folded to which side of the fold line. However, since it locks to the frame-shaped part, the folded state of the packaging container can be maintained even when the flap-shaped part is tilted from either side.

  When the pair of cut lines have a curved portion, the convex portion defined by the curved portion can be locked to the flap-shaped portion or the frame-shaped portion. By providing the curved portions at positions that are symmetrical with respect to each other, the folded state of the packaging container can be maintained even when the flap-shaped portion is tilted from either side.

  If the score line is symmetrical with respect to the fold line, a frame-like shape defined by the score line regardless of which side of the fold line the flap-shaped part defined by the pair of score lines folds. Since it does not interfere with the portion, the folded state of the packaging container can be maintained when the flap-like portion is tilted from either side.

  When the cut line has curved portions one by one on both sides of the folding line and not line-symmetrical via the folding line, the convex portion defined by one curved portion is It can be locked to the linear frame-shaped portion without corresponding to the concave portion defined by the curved portion.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 to 5 show a packaging container 1 according to the first embodiment. The packaging container 1 is a perspective view in FIGS. 1 and 5 by folding a sheet of cardboard as shown in FIG. 2 and bonding it at a predetermined portion, and FIG. 3 is a five-side view excluding a bottom view. As shown.

  The packaging container 1 includes a bottom plate 2, a top plate 3 composed of a flat plate 3 a and front and back swash plates 3 b and 3 c, and left and right standing plates 4 a and 4 b erected between the bottom plate 2 and the top plate 3. And rear and front standing plates 5a and 5b, on the center line in the width direction passing through the bottom plate 2 and the top plate 3, the fold line 21 on the bottom plate 2, and the left and right perforations on the top plate 3. A zipper 31 composed of 31a, 31b and a rhombus portion 31c defined thereby is provided, and the zipper 31 is broken as shown in FIG.

  In the unfolded state, the packaging container 1 is a sheet of thick paper as shown in FIG. 2, and includes a rectangular bottom plate 2, an upright plate 5 a located on the left and right of the bottom plate 2 in the drawing, and an inner front stand plate 5 b ′. The top plate 3 is located on the left side of the back plate 5a and is composed of the back swash plate 3c, the flat plate 3a and the front swash plate 3b in order from the right, and the outer front stand plate 5b located on the left side of the top plate 3. An outer right standing plate 4b and a left standing plate 4a located above and below the flat plate 3a, an inner right standing plate 4b 'and a left standing plate 4a' located above and below the bottom plate 2, and an inner right standing plate. Folding pieces 41a, 41b, 41c and 42a, 42b, 42c disposed on the sides of the 4b 'and the left standing plate 4a' in contact with the back swash plate 3c, the flat plate 3a, and the front swash plate 3b; It arrange | positions in the edge | side which contact | connects inner right standing board 4b 'and left standing board 4a' in board 5b 'and back board 5a. Folding piece 51a, 51b and 52a which consists of 52b.

  The zipper 31 includes left and right perforations 31a and 31b provided substantially horizontally on the center line in the width direction of the packaging container 1, that is, in the center in the vertical direction in FIG. 2, and rhombus portions 31c defined by these. . The left and right perforations 31a, 31b extend in order from the right to the back plate 5a, the back swash plate 3c, the flat plate 3a, the front swash plate 3b, and the outer front stand plate 5b, and the distance between them is the central portion of the flat plate 3a. 2 is the narrowest at the right and left ends in FIG. 2 of the rear and front standing plates 5a and 5b, and is formed in a substantially rhombus as a whole. The rhombus 31c defined by the left and right perforations 31a and 31b has a handle 31d slightly protruding at the left end in FIG. 2, and the handle 31d is pinched and pulled from the front side to the back side in FIG. The box can be opened by breaking 31a and 31b. The folding line 21 is provided on the center line in the width direction of the packaging container 1, that is, in a substantially horizontal direction in FIG. 2 so as to cross the bottom plate 2.

  A pair of slits 45a, 46a and 45b, 46b are provided in the inner left standing plate 4a 'and right standing plate 4b', respectively.

  The bottom plate 2 has a pair of left and right cut lines 61a and 61b formed so as to intersect with the fold line 21, and a pair of upper and lower fold lines 62a and 62b connecting both ends of the respective cut lines 61a and 61b. Provided. The cut lines 61a and 61b are symmetrical with respect to the fold line 21, and the distance between them is the widest at the portion intersecting with the fold line 21, and the distance between the both ends is the narrowest. Further, the cut lines 61a and 61b are respectively provided with broken portions 64a and 64b and 64c and 64d that are not cut above and below the folding line 21.

  In order to assemble this packaging container 1, the inner left and right upright plates 4 b ′ and 4 a ′ in contact with the bottom plate 2, the rear upright plate 5 a and the inner front upright plate 5 b ′ are Folding pieces 52a, 52b, 51a, 51b that are in contact with the rear and front standing plates 5a, 5b ′ are valley-folded at the sides that are in contact with the rear and front standing plates 5a, 5b ′, respectively. At this time, hook portions 53a, 53b, 54a, 54b provided at the tips of the folding pieces are respectively inserted into slits 45b, 45a, 46b, 46a provided in the inner left and right standing plates 4a ′, 4b ′. Engage. Subsequently, valley folding is performed at each side where the rear and front standing plates 5a and 5b and the top plate 3 and the flat plate 3a and the front and rear swash plates 3b and 3c are in contact, and the flat plate 3a is parallel to the bottom plate 2. To be. At this time, the outer front standing plate 5b overlaps the inner front standing plate 5b ', and the flat plate 3a and the front and rear swash plates 3b and 3c overlap the folding pieces 41b and 42b and 41c and 42c and 41a and 42a. Finally, valley folding is performed at the side where the flat plate 3a contacts the left and right standing plates 4a and 4b, so that the left and right standing plates 4a and 4b overlap the inner left and right standing plates 4a 'and 4b'. By bonding the overlapping portions in this state, the packaging container 1 as shown in FIGS. 1, 3 and 4 is assembled.

  In order to fold the packaging container 1 as shown in FIG. 5, the handle 31d of the zipper 31 is pinched and pulled from the front to the back in FIG. 1, and the perforations 31a and 31b are broken to form the rhombus 31c. Remove from packaging container 1. Then, by folding the fold line 21 of the bottom plate 2, the packaging container 1 can be folded in two on the left and right sides of the center line in the width direction as shown in FIG. 5. In this state, the left and right standing plates 4a and 4b are used as the bottom, and the confectionery in the box can be easily taken out from the openings 91 and 92.

  The packaging container 1 is not only folded at the folding line 21 of the bottom plate 2 but also in order to hold the folded state more reliably, as shown in FIG. A locking mechanism 6 is provided for holding the container 1 in a folded state. The locking mechanism 6 includes the pair of cut lines 61a and 61b, a pair of folding lines 62a and 62b that connect both ends of the cut lines 61a and 61b, a pair of cut lines 61a and 61b, and a pair. And a flap 63 defined by fold lines 62a and 62b. The flap 63 includes an upper half flap 63a and a lower half flap 63b in the figure with the fold line 21 in between.

  When the packaging container 1 is folded in the above-described procedure, the locking mechanism 6 is folded in two via the folding line 21 as shown in FIG. The flap 63b of the upper half is positioned on the back side.

  In this state, when the flap 63 is pinched and the lower half flap 63b is pushed down to the back side, the breaking portions 64a, 64b and 64c, 64d are broken as shown in FIG. 4C, and the entire flap 63 falls down to the back side. . At this time, the edges 65a, 65b and 66a, 66b are broken by the pair of cut lines 61a, 61b on the left and right sides of the flaps 63a and 63b, and the flaps 63a and 63b are pulled out from the bottom plate 2. Frame-shaped edges 67a and 67b and 68a and 68b exposed on the left and right sides of the openings to be formed are formed.

  Since the lower half flap 63b and the upper half flap 63a are symmetrical with respect to the folding line 21, the left and right edges 66a and 66b of the lower half flap 63b are located at the upper half of the bottom plate 2. Since the flap 63a is broken and pulled out, it does not interfere with the edges 67a and 67b exposed in a frame shape. Further, since the folding lines 62a and 62b are provided, the flap 63 can be pushed down only by applying a small force to the extent that the breaking portions 64a and 64b and 64c and 64d are broken.

  When the flap 63 is tilted about 90 ° with respect to the bottom plate 2, the folding lines 62a and 62b are folded to such an extent that the restoring force of the paper does not act strongly, so that the flap 63 is held in a tilted state. Here, when the folding of the packaging container 1 is released, that is, when a force for restoring the mountain fold at the fold line 21 of the bottom plate 2 is applied, the left and right edges 66a and 66b of the lower half flap 63b It abuts on the side frame-like edges 67a and 67b. That is, in a state where the flap 63 is inclined by 90 ° with respect to the bottom plate 2, the left and right edges 66a and 66b of the lower half flap 63b are respectively 90 ° with respect to the edges 67a and 67b of the back side portion of the bottom plate 2, respectively. When the force for restoring the mountain fold at the fold line 21 of the bottom plate 2 is applied, the flap 63b is subjected to a pulling force through the fold line 62b and moves to the front side of the flap 63 in the plate surface direction. And Then, since the fold line 21 in the flap 63 is wider than the fold line 62b on the front side in FIG. 4C, the left and right edges 66a and 66b of the lower half flap 63b are connected to the back of the bottom plate 2 in FIG. It catches on the side frame-like edges 67a and 67b.

  When the flap 63 is caught by the frame-like edges 67a and 67b by the above action, the flap 63 cannot be moved further forward in FIG. 4C, so that the folded state of the packaging container 1 is maintained. . In this example, the operation when the flap 63 is tilted back in FIG. 4C has been described. However, since the locking mechanism 6 is formed symmetrically via the fold line 21, the flap 63 is brought forward. Even when pulled down, the same operation and effect can be obtained.

  As described above, according to the packaging container 1 provided with the locking mechanism 6 of this embodiment, the folded state can be easily maintained, but the effect is that the folding lines 62a and 62b and the folding line 21 Varies depending on the angle between Therefore, as shown in FIG. 7, an experiment was conducted on the effect of maintaining the folded state by changing the angle θ formed by the folding lines 62a and 62b and the folding line 21 in various ways. In the figure, the values of θ are respectively (A) 130 °, (B) 125 °, (C) 120 °, (D) 115 °, (E) 110 °, (F) 105 °, (G) was set to 100 °.

  Generally, the force required to push down or return the flap with the bottom plate folded in two is affected by the friction between the left and right edges of the flap and the frame-like edge of the bottom plate. Since the area of contact between the left and right edges of the flap and the frame-like edge of the bottom plate in a state where the flap is inclined is increased, the friction is increased.

  Therefore, as shown in (A), when θ is 130 °, even if the flap is pushed down while the bottom plate is folded in two, the contact area between the left and right edges of the flap and the frame edge of the bottom plate is small in this state. Since the restoring force of the paper is superior to the frictional force, the flaps are returned.

  On the other hand, as described above, the flap 63 is wider at the fold line 21 portion than at the fold line 62b portion, so that the left and right edges 66a and 66b of the lower half flap 63b are the frame on the back side of the bottom plate 2. As a result, the difference in width between the fold line 62b and the fold line 21 becomes smaller as θ approaches 90 °, and the catch is eliminated with a small force. When θ is less than 90 °, the fold line 21 portion is narrower than the fold line 62b portion, and the above action does not occur.

  Therefore, as shown in G, when θ is 100 °, the catch by the locking mechanism 6 has been eliminated with a small force.

  As shown in (E), when θ is variously set as described above and the effect of holding the folded state is verified, when θ is 110 °, both the frictional force and the hooking force appear as described above. Strongly folded in two.

  As described above, according to the packaging container 1 of the first embodiment, the container can be held in a folded state when the flap-shaped portion is folded down in either direction, and in particular, θ is 110 °. The effect is strongest when set to.

  FIG. 7 shows the packaging container 11 of the second embodiment. The packaging container 11 is different from the packaging container 1 in that a locking mechanism 7 is provided. Since the other points are the same as those of the packaging container 1, the same reference numerals are given as appropriate, and the description thereof is omitted. Further, the five-side views excluding the perspective view and the bottom view are the same as the packaging container 1 shown in FIGS.

  As shown in FIG. 7A, the packaging container 11 has a locking mechanism 7 on the bottom plate 2 in order to hold the folded state more reliably. Hereinafter, this point will be described in detail.

  The bottom plate 2 of the packaging container 11 has a pair of cut lines 71a and 71b formed so as to intersect with the fold line 21, and a pair of fold lines 72a connecting both ends of the respective cut lines 71a and 71b. 72b. The cut lines 71a and 71b are symmetrical except for curved portions 71c and 71d, which will be described later, with the fold line 21 in between, and the distance between them is the widest at the portion intersecting the fold line 21 and the narrowest at both ends. .

  The locking mechanism 7 includes a pair of cut lines 71a and 71b, a pair of fold lines 72a and 72b, and a flap 73 defined by the pair of cut lines 71a and 71b and the pair of fold lines 72a and 72b. Become. The flap 73 is composed of an upper half flap 73a and a lower half flap 73b in FIG. The cut line 71a is provided with curved portions 71c and 71d that are cut inwardly of the flap 73 near the fold line 72b, and the cut line 71b is provided near the fold line 72a. The curved portions 71 c and 71 d are provided symmetrically via the center point of the flap 73. The cut lines 71a and 71b are provided with rupture portions 74a and 74b and 74c and 74d that are not cut on both sides of the folding line 21, respectively.

  When the packaging container 11 is folded into two in the above-described procedure, the locking mechanism 7 is folded into two via the folding line 21 as shown in FIG. The upper half flap 73a is located on the back side.

  In this state, when the flap 73 is pinched and the lower half flap 73b is pushed to the back side, as shown in FIG. 7C, the breaking portions 74a, 74b and 74c, 74d are broken, and the entire flap 73 is turned to the back side. Fall down. At this time, the edges 75a, 75b and 76a, 76b are broken at the left and right sides of the flaps 73a and 73b by the pair of cut lines 71a and 71b, and the flaps 73a and 73b are cut off from the bottom plate 2. Frame-shaped edges 77a, 77b and 78a, 78b exposed on the left and right sides of the openings to be formed are formed. Further, a convex portion 79a is formed on the frame-shaped edge 77a by a curved portion 71c, and a convex portion 79b is formed on the convex-shaped frame-shaped edge 78b by a curved portion 71d.

  In the pushing-down operation described above, when the lower half flap 73b is pushed backward, the right edge 76b of the lower half flap 73b is pressed against the convex portion 79b. When a slight force is further applied to push the flap 73b to the back side, the right edge 76b and the convex portion 79b are distorted, and the right edge 76b gets over the convex portion 79b as shown in FIG. 7C.

  Since the lower half flap 73b and the upper half flap 73a are symmetric with respect to the folding line 21 except for the curved portions 71c and 71d, the left and right edges 76a and 76b of the lower half flap 73b are formed on the bottom plate 2. Edges 77a and 77b exposed in a frame shape by breaking and removing the upper half flap 73a in the back side portion and the projection 79b do not interfere with each other. Further, since the folding lines 72a and 72b are provided, the flap 73 can be pushed down only by applying a small force such that the breaking portions 74a and 74b and 74c and 74d are broken.

  When the flap 73 is tilted by about 90 ° with respect to the bottom plate 2, the folding lines 72a and 72b are folded to the extent that the restoring force of the paper does not act strongly, and the right edge 76b is convex even if the flap 73 tries to return to the original position. Since it is impossible to get over 79b to the near side, the flap 73 is held in a collapsed state.

  Here, when the folding of the packaging container 11 is released, that is, when a force for restoring the mountain fold at the fold line 21 of the bottom plate 2 is applied, the left and right edges 76a and 76b of the lower half flap 73b It contacts the side frame-shaped edges 77a and 77b. That is, in a state where the flap 73 is tilted by 90 ° with respect to the bottom plate 2, the left and right edges 76a and 76b of the lower half flap 73b are respectively 90 ° with respect to the edges 77a and 77b of the back side portion of the bottom plate 2, respectively. When the force that restores the mountain fold at the fold line 21 of the bottom plate 2 is applied, the force applied to the flap 73 through the fold line 72b is applied to the flap 73, and the flap 73 moves toward the plate surface direction. And Then, since the flap 73 is wider in the rear folding line 21 portion than the front folding line 72b portion in the drawing, the left and right edges 76a and 76b of the lower half flap 73b are the rear frame of the bottom plate 2. Is caught on the edge 77a and 77b.

  When the flap 73 is caught by the frame-shaped edges 77a and 77b by the above operation, the flap 73 cannot be moved further forward in FIG. 7C, so that the folded state of the packaging container 1 is maintained. . In this example, the operation when the flap 73 is tilted back in FIG. 7C has been described. However, since the locking mechanism 7 is formed in point symmetry with respect to the center in the deployed state, the flap 73 is The same action and effect can be obtained even when pulled forward. In addition, even when the curved portions 71c and 71d are provided in the vicinity of the folding line 72a in the cut line 71a and in the vicinity of the folding line 72b in the cut line 71b, exactly the same operations and effects can be obtained. .

  FIG. 8 shows the packaging container 12 of the third embodiment. The packaging container 12 is different from the packaging container 1 in that a locking mechanism 8 is provided. Since the other points are the same as those of the packaging container 1, the same reference numerals are given as appropriate, and the description thereof is omitted. Further, the five-side views excluding the perspective view and the bottom view are the same as the packaging container 1 shown in FIGS.

  The packaging container 12 is characterized by having a locking mechanism 8 on the bottom plate 2 as shown in FIG. Hereinafter, this point will be described in detail.

  The bottom plate 2 of the packaging container 12 has a pair of cut lines 81a and 81b formed so as to intersect the fold line 21, and a pair of fold lines 82a and 82b that connect both ends of each of the cut lines 81a and 81b. 82b. The cut lines 81a and 81b are symmetrical except for curved portions 81c, 81d, 81e, and 81f, which will be described later, with the fold line 21 in between, and the distance between them is the widest at the portion that intersects the fold line 21, and the both ends The narrowest part.

  The locking mechanism 8 includes a pair of cut lines 81a and 81b, a pair of fold lines 82a and 82b, and a flap 83 defined by the pair of cut lines 81a and 81b and the pair of fold lines 82a and 82b. Become. The flap 83 is composed of an upper half flap 83a and a lower half flap 83b in FIG. The cut lines 81a and 81b are provided with curved portions 81c, 81d and 81e, 81f that are cut inwardly of the flap 83 in the vicinity of the fold lines 82a and 82b, respectively. The curved portions 81 c, 81 d and 81 e, 81 f are symmetric through the vertical center line 83 c in the flap 83, but are asymmetric through the fold line 21. Further, the cut lines 81a and 81b are provided with rupture portions 84a and 84b and 84c and 84d that are not cut on both sides of the folding line 21, respectively.

  When the packaging container 12 is folded in two according to the above-described procedure, the locking mechanism 8 is folded in two via the folding line 21 as shown in FIG. The flap 83b of the upper half is positioned on the back side. At this time, the curved portions 81c and 81e do not overlap with 81d and 81f.

  In this state, when the flap 83 is pinched and the lower half flap 83b is pushed to the back side, as shown in FIG. 8C, the breaking portions 84a, 84b and 84c, 84d are broken, and the entire flap 83 is turned to the back side. Fall down. At this time, the edges 85a, 85b and 86a, 86b are broken and removed from the left and right side portions of the flaps 83a and 83b by the pair of cut lines 81a and 81b, and the flaps 83a and 83b are pulled out from the bottom plate 2. Frame-shaped edges 87a and 87b and 88a and 88b exposed on the left and right sides of the openings to be formed are formed. Further, convex portions 89a and 89b are formed on the frame-shaped edge 86a by the curved portions 81c and 81d, and convex portions 89c and 89d are formed on the frame-shaped edge 86b by the curved portions 81e and 81f, respectively. At this time, the convex portions 89a and 89c and the convex portions 89b and 89d do not overlap.

  In the pushing-down operation described above, when the lower half flap 83b is pushed backward, the left and right edges 86a, 86b of the lower half flap 83b are pressed against the convex portions 89a, 89c. When the flap 83b is pushed to the back side by applying a little more force, the left and right edges 86a and 86b and the convex portions 89a and 89c are distorted, and the left and right edges 86a and 86b are convex as shown in FIG. Get over the parts 89a and 89c.

  Since the lower half flap 83b and the upper half flap 83a are symmetrical with respect to the folding line 21, except for the curved portions 81c, 81d, 81e, 81f, the left and right edges 86a and 86b of the lower half flap 83b are In the back side portion of the bottom plate 2, there is no interference except for the edges 87a and 87b and the convex portions 89a and 89c exposed in a frame shape by breaking and removing the upper half flap 83a. Further, since the folding lines 82a and 82b are provided, the flap 83 can be pushed down only by applying a small force to the extent that the breaking portions 84a and 84b and 84c and 84d are broken.

  When the flap 83 is tilted by about 90 ° with respect to the bottom plate 2, the folding lines 82a and 82b are folded to such an extent that the restoring force of the paper does not act strongly, and even if the flap 83 tries to return to the original position, Since the convex portions 89a and 89c cannot be moved forward, the flap 83 is held in a collapsed state.

  Here, when the folding of the packaging container 12 is released, that is, when a force for restoring the mountain fold at the fold line 21 of the bottom plate 2 is applied, the left and right edges 86a and 86b of the lower half flap 83b It abuts on the side frame-like edges 87a and 87b. That is, in a state where the flap 83 is inclined by 90 ° with respect to the bottom plate 2, the left and right edges 86a and 86b of the lower half flap 83b are respectively 90 ° with respect to the edges 87a and 87b of the back side portion of the bottom plate 2, respectively. When the force that restores the mountain fold at the fold line 21 of the bottom plate 2 is applied, the flap 83 is subjected to a pulling force through the fold line 82b and moves to the front side of the flap 83 in the plate surface direction. And Then, the flap 83 is wider at the fold line 21 part at the back than the fold line 82b at the front side in the figure, so that the left and right edges 86a and 86b of the lower half flap 83b are the frame on the back side of the bottom plate 2. Is caught on the edges 87a and 87b.

  When the flap 83 is caught by the frame-shaped edges 87a and 87b by the above action, the flap 83 cannot be moved further forward in FIG. 8C, so that the folded state of the packaging container 1 is maintained. . In this example, the operation when the flap 83 is tilted back in FIG. 8C has been described. However, the same operation and effect can be obtained when the flap 83 is tilted forward. In addition, even when the curved portions 81c, 81d and 81e, 81f are provided in the vicinity of the fold line 21 and the vicinity of 82b in the cut lines 81a, 81b, exactly the same operations and effects can be obtained.

  As described above, the packaging container of the present invention is configured so that the folded state can be maintained by pushing down the flap portion in an arbitrary direction, and the material does not deviate from the gist thereof. The present invention can be implemented in a form in which various changes or modifications are added to the shape and the like. For example, the top plate has a cubic top plate 35a shown in FIG. 9A, a bowl-shaped top plate 35b shown in FIG. 9B, and a triangular roof top plate 35c shown in FIG. 9C. There may be. Further, the curved portions 81c, 81d, 81e, and 81f in the third embodiment may be provided only on any of the right and left cut lines 81a and 81b.

  The packaging container of the present invention can be used not only for confectionery but also for a box for storing various items such as ice cream and paper napkins and for use in a folded state.

It is a perspective view which shows the container for packaging of 1st embodiment. It is an expanded view which shows the container for packaging of FIG. It is a 5th page figure except the bottom view which shows the packaging container of FIG. 1, (A) is a front view, (B) is a top view, (C) is a rear view, (D) is a left view, (E) Is a right side view. 1 shows a locking mechanism in the packaging container of FIG. 1, (A) is a bottom view, and the locking mechanism is shown by a solid line and the others are shown by a two-dot chain line. (B) is the front view which shows the state which folded the packaging container in half, (C) is a perspective view which shows the state which fell the flap in the back | inner side. It is a perspective view which shows the state which folded the packaging container of FIG. 1 into two. In the packaging container of FIG. 1, the locking mechanism in the case where the angle formed by the left and right edges of the flap and the fold line is variously changed is shown. The packaging container of 2nd embodiment is shown, (A) is a bottom view, A locking mechanism is shown as a continuous line, and others are shown with a dashed-two dotted line. (B) is the front view which shows the state which folded the packaging container in half, (C) is a perspective view which shows the state which fell the flap in the back | inner side. The packaging container of 3rd embodiment is shown, (A) is a bottom view, A locking mechanism is shown as a continuous line, and others are shown with a dashed-two dotted line. (B) is the front view which shows the state which folded the packaging container in half, (C) is a perspective view which shows the state which fell the flap in the back | inner side. It is a perspective view which shows the packaging container of other embodiment, (A) is a cube-shaped top plate, (B) is a bowl-shaped top plate, (C) is a packaging container which has a triangular roof-shaped top plate. Indicates. The broken line part for opening fixation of a 1st prior art example is shown, (A) is an unfolding state, (B) shows the state which folded the packaging container into two. The broken line part for opening fixation of a 2nd prior art example is shown, (A) is an unfolding state, (B) shows the state which folded the packaging container in half.

Explanation of symbols

1,11,12 Packaging container 2 Bottom plate 3 Top plate 3a Flat plate 3b, 3c Swash plate 4a, 4b Right, left standing plate 4a ', 4b' Inside right, left standing plate 5a, 5b Back, front standing Plate 5b 'Inside front standing plate 6, 7, 8 Locking mechanism 21 Folding line 31 Zipper 31a, 31b Right, left perforation 31c Diamond portion 35a, 35b, 35c Top plate 41a, 41b, 41c, 42a, 42b, 42c, 51a, 51b, 52a, 52b Folding pieces 45b ', 46b', 45a ', 46a' Slits 53a, 53b, 54a, 54b Hook parts 61a, 61b, 71a, 71b, 81a, 81b Cut lines 62a, 62b, 72a, 72b, 82a, 82b Folding line 63, 73, 83 Flap 63a, 73a, 83a Upper half flap 63b, 73b, 83b Lower half flap 6 a, 64b, 64c, 64d, 74a, 74b, 74c, 74d, 84a, 84b, 84c, 84d Breaking portion 65a, 65b, 66a, 66b, 75a, 75b, 76a, 76b, 85a, 85b, 86a, 86b Edge 67a , 67b, 68a, 68b, 77a, 77b, 78a, 78b, 87a, 87b, 88a, 88b Frame-shaped edges 71c, 71d, 81c, 81d, 81e, 81f Curved portions 79a, 79b, 89a, 89b, 89c, 89d Convex Portion 83c Vertical center line 91, 92 Opening 101, 201 Packaging container 103a, 103b, 203a, 203b Opening fixing breaking line 104, 204 Flap-like portion 105b, 205b Frame portion 204a, 204a Convex portion

Claims (4)

A bottom plate, a top plate, and left and right standing plates provided between the bottom plate and the top plate,
On the center line in the width direction passing through the bottom plate and the top plate, the bottom plate is provided with a fold line, the top plate is provided with a zipper,
A packaging container that can be folded in two symmetrically through the fold line by breaking the zipper,
The bottom plate includes a pair of score lines formed so as to intersect the fold line and approach each other as the distance from the fold line increases.
The packaging container, wherein the packaging container is folded in two via the folding line, and the folded state is maintained by folding a portion sandwiched between the pair of cut lines into an arbitrary one. .   The packaging container according to claim 1, wherein the pair of cut lines are line-symmetric with respect to the fold line.   2. The packaging container according to claim 1, wherein each of the pair of cut lines has one curved portion at a point-symmetrical position.   2. The packaging container according to claim 1, wherein the cut line has curved portions on both sides of the fold line and in a non-axisymmetric position via the fold line.

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