JP6132663B2 - Corrugated cardboard box - Google Patents

Description

  The present invention relates to a torsion-preventing corrugated cardboard box in which a chamfered portion is formed at the base of a top surface flap.

  Conventionally, as a corrugated cardboard box for packing a product such as a liquid-filled bottle, the one shown in FIG.

  The corrugated cardboard box has a side wall 51 and an end plate 52 facing each other to form a peripheral wall having a rectangular tube shape. The inner flap 53 extends from the lower end and the upper end of the end plate 52, and the outer flap extends from the lower end and the upper end of the side plate 51. 54 are sequentially folded to close the bottom surface and the top surface.

  Then, crease lines 53a and 54a parallel to the crease lines 52a and 51a at the boundary between the end plate 52 and the side plate 51 are put in the base portions of the inner flap 53 and the outer flap 54 on the bottom surface and the top surface, respectively, and the chamfered portions 56 and 57 are placed. And is configured to prevent barrel-like deformation due to a loading load at the time of stacking.

JP 2009-214925 A

  However, in the cardboard box as described above, when the outer flap 54 is folded after the inner flap 53 is folded at the time of assembling for product packaging, the base of the outer flap 54 collides with the side end of the inner flap 53, There is a risk that the outer flap 54 may be bent.

  As a workaround for such a phenomenon, it is conceivable to cut the side end portion of the inner flap 53 at the time of punching the blank at the time of manufacturing the cardboard box. In this case, a so-called punched residue is generated and removed. In addition to troublesome treatment, there is a gap in the top corners in the packaged state, and dust may enter the box during the distribution process.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to prevent the occurrence of punching waste during the manufacture of a cardboard box for preventing the swelling of a trunk and to prevent the generation of a gap in the packaged state.

  In order to solve the above problems, in the present invention, the side plate and the end plate are opposed to each other to form a square cylindrical peripheral wall, and the inner flap and the outer flap extending from the upper end of the end plate and the side plate are sequentially folded, and the top surface In addition, an inclined chamfered portion is formed at the base of the inner flap and the outer flap at a distance from the crease line at the boundary with the end plate and the side plate, respectively. In the corrugated cardboard box that prevents the barrel-like deformation due to the upper load, the side end of the inner flap has a diagonal line extending obliquely inward from the corner on the base side at the chamfered portion, and from the side edge on the tip side from the chamfered portion. A weakening process was performed so that the portion defined by the side folding lines inserted at intervals was bent by being pressed by the base of the outer flap when the outer flap was bent.

  In addition, as the weakening process, a cut line in which all cuts are intermittently formed in a perforation or a half cut line is inserted, or a ruled line in which a corrugated cardboard is crushed in a linear form.

  Further, as the weakening process, a corrugated weakening portion is formed by crushing the core of the corrugated cardboard at a portion defined by the oblique fold line and the side fold line at the side end portion of the inner flap.

  In the cardboard box according to the present invention, when the outer flap is bent after the inner flap is bent in the packing process, the side end of the weakened inner flap is pressed against the base of the outer flap and bent. Can be folded and sealed without hindrance.

  In addition, it is not necessary to cut the side edge of the inner flap when punching a blank at the time of manufacture. Since there is no gap in the part, it is possible to prevent dust from entering the box.

  And even if it piles up in the distribution | distribution process and a big loading load acts, since a deformation | transformation is absorbed by the change of the inclination angle of a chamfering part, the barrel swelling which becomes a barrel shape is prevented.

The figure which shows the blank of the swelling cardboard box which concerns on embodiment of this invention The perspective view which shows the state at the time of goods insertion in the packing process same as the above The perspective view which shows the bending state of an inner flap same as the above The partial expansion perspective view which shows the bending process of an outer flap same as the above The perspective view which shows a packing state same as the above A partially enlarged view of a blank showing an example in which (a) a ruled line is given as a weakening process or (b) a crushed shape is given. The perspective view which shows the packing state of the conventional cardboard box which prevents swelling

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  This cardboard box is assembled from a cardboard blank shown in FIG. In this blank, a pair of side plates 1 forming a long surface of a peripheral wall and end plates 2 forming a width surface are alternately connected to each other, and a passage piece 3 is connected to the outer end of one side plate 1. An inner flap 4 and an outer flap 5 are connected to the lower ends of the end plate 2 and the side plate 1, respectively, and an inner flap 6 and an outer flap 7 are connected to the lower ends of the end plate 2 and the side plate 1, respectively. The crease line forming these boundaries is a ruled line obtained by crushing the corrugated cardboard from the back side.

  At the bases of the upper inner flap 6 and the outer flap 7, the crease lines 6a and 7a parallel to the crease lines 2a and 1a at the boundary with the end plate 2 and the side plate 1 are put, respectively, and the crease lines 6a and 7a are also It is a ruled line obtained by crushing the cardboard in a linear shape from the back side. The portion between the crease lines 2a and 6a and the portion between the crease lines 1a and 7a are portions that become chamfered portions 8 and 9, respectively.

  At both end portions of the upper inner flap 6, a cut line 21 is formed on a hypothetical oblique fold line 10 that extends from the corner on the base side to the crease line 6 a obliquely inward in the chamfered portion 8. Further, on the tip side from the chamfered portion 8, a cut line 22 is put on a virtual side fold line 11 parallel to the side edge from the intersection of the oblique fold line 10 and the crease line 6a, and the cut line 11 and the side edge Between these, a cut line 23 parallel to these is inserted. And the part which has the cut lines 21, 22, and 23 divided by the diagonal fold line 10 and the side fold line 11 is a part which gave the weakening process.

  The cut lines 21, 22, and 23 are all cuts through which the cuts penetrate the front and back of the cardboard. Of these, the cut lines 22 and 23 are cut and formed in a perforated form.

  Further, the inner flaps 4 and 6 are subjected to a step crushing process that crushes the corrugated core of the corrugated cardboard except for the base (shaded portion in FIG. 1). This is to suppress a gap generated between the outer flaps 5 and 7 and the product as much as possible in a portion where the inner flaps 4 and 6 and the outer flaps 5 and 7 do not overlap when the product is packed.

  When assembling such a blank and packing a bottle containing mouthwash, which is a product, as shown in FIG. 2, each pair of side plates 1 and end plates 2 is formed with a square cylindrical peripheral wall. The inner flap 4 and the outer flap 5 are folded in order, the inner flap 4 and the outer flap 5 are fixed with an adhesive or tape, and the bottom surface is closed. A predetermined number of bottles B are inserted.

  Next, as shown in FIG. 3, when the upper inner flap 6 is folded inward, the chamfered portion 8 of the inner flap 6 gradually moves from the crease line 2a side to the crease line 6a side along the head of the bottle B. It inclines so that it may become high, and the part of the front end side from the chamfering part 8 will be in the state supported on the head of the bottle B, and supported horizontally.

  Subsequently, as shown in FIG. 4, when the outer flap 7 is bent inward, the side end of the inner flap 6 is pressed against the base of the outer flap 7, and the head of the bottle B is centered on the cut lines 21, 22, and 23. It bends downward along the part, and collision between the side end of the inner flap 6 and the outer flap 7 is avoided.

  Then, as shown in FIG. 5, when the outer flap 7 is further bent, the outer flap 7 is bent about the crease line 7a and overlaps the upper surface of the inner flap 6, and the chamfered portion 9 is creased from the crease line 1a side. 7a, and the tip end side of the chamfered portion 9 is horizontally supported by the head of the bottle B. The inner flap 6 and the outer flap 7 are bonded with an adhesive or tape. When is fixed, the top is closed and sealing is completed.

  Thus, in the corrugated cardboard box as described above, in order to close the top surface in the packing process, when the outer flap 7 is folded after the inner flap 6 is folded, the cut lines 21, 22, and 23 are inserted and weakened. Since the side end portion of the inner flap 6 subjected to the above is pressed and bent by the base portion of the outer flap 7, the outer flap 7 can be bent and sealed without any trouble.

  Moreover, since it is not necessary to cut the side end of the inner flap 6 when punching a blank at the time of manufacture, there is no occurrence of a waste, and the trouble of removing the waste can be reduced. Since there is no gap in the corner, it is possible to prevent dust from entering the box.

  And even if a large stacking load is applied in the distribution process, the deformation is absorbed by the change in the inclination angle of the chamfered portions 8 and 9, so that the barrel-shaped swelling is prevented.

  In the above-described embodiment, as the weakening process applied to the side end portion of the inner flap 6, the cut lines 21, 22, and 23 are entered, the cuts are completely cut, and the cuts of the cut lines 22 and 23 are intermittently formed in a perforated shape. However, instead of these, as shown in FIG. 6 (a), ruled lines 24, 25, and 26 in which the corrugated board is crushed linearly from the back surface may be inserted, and the corrugated board is thickened. A half-cut line cut by about half of the direction may be inserted.

  In addition, as a weakening process in place of these, as shown in FIG. 6 (b), the corrugated core of the corrugated cardboard is pushed at the portion defined by the oblique fold line 10 and the side fold line 11 at the side end of the inner flap 6. The crushing process which crushes may be performed and the crushing weakening part 27 may be formed. In this example, when the inner flap 6 is subjected to a crushing process for adjusting a gap with a product (see the hatched portion in FIG. 1), the crushing process of the crushing weakening part 27 is performed by a crushing process for adjusting the gap. It is better to apply more strongly.

  Moreover, although the diagonal fold line 10 and the side fold line 11 which divide a weakening process part were illustrated respectively as a straight line, the one or both may become a curve.

  Moreover, although the corner | angular part by the side of the front end of the inner flap 6 was illustrated at right angle, considering the sealing property in a caser, the corner | angular part by the side of the front end of the inner flap 6 was diagonally cut | disconnected linearly. Alternatively, it may be cut into a bulging arc shape.

  Moreover, in the said embodiment, although what chamfered part 8 and 9 was provided only in the upper part of a cardboard box was illustrated, when providing a chamfer part also in the lower part of a cardboard box, the side edge part of the lower inner flap 4 is provided. In addition, it is advisable to apply a weakening process as described above.

  Furthermore, in the said embodiment, although illustrated about the fluted type corrugated cardboard box which folds and closes the inner flaps 4 and 6 and the outer flaps 5 and 7 on both the bottom face and the top face, the bottom face side is inclined diagonally from the diagonal. A structure called a one-touch bottom, in which a crease line is inserted and a part of the adjacent bottom plate is pasted together so that it can be quickly assembled from the folded state, and the edge of the bottom plate extending from each pair of side plates 1 and end plates 2 A structure called a semi-one touch bottom may be used in which irregularities and oblique sides are formed in the base plate so that the bottom plates can be easily engaged with each other. Further, in a two-piece cardboard box composed of a lid part having an open bottom and a tray, the above configuration may be applied to the top surface of the lid part.

  Moreover, although the crease line 1a and the crease line 7a and the crease line 2a and the crease line 6a are illustrated in parallel, the crease lines 1a and 2a and the crease lines 7a and 6a are V or any combination thereof. It may be bent in a letter shape or gently curved.

DESCRIPTION OF SYMBOLS 1 Side plate 2 End plate 3 Passage piece 4,6 Inner flap 5,7 Outer flap 1a, 2a, 6a, 7a Folding line 8,9 Chamfer part 10 Diagonal line 11 Side folding line 21,22,23 Cut line 24,25, 26 Ruled Line 27 Step Crush Weakening Part B Bottle

Claims (4)

An inner flap (6) and an outer flap (7) extending from the upper ends of the end plate (2) and the side plate (1), respectively, are formed by opposing the side plate (1) and the end plate (2) to form a square cylindrical peripheral wall. Are folded in order to close the top surface, and from the fold line (2a, 1a) at the boundary between the end plate (2) and the side plate (1) to the base of the inner flap (6) and the outer flap (7), respectively. In the corrugated cardboard box that forms the inclined chamfered portion (8, 9) by inserting the crease lines (6a, 7a) at intervals, and prevents the barrel-shaped deformation due to the loading load at the time of stacking,
The side end of the inner flap (6) has a beveled line (10) extending obliquely inward from the corner on the base side at the chamfered part (8), and a distance from the side edge on the tip side from the chamfered part (8). A part with weak processing that is divided by the side fold line (11) put in place is provided ,
As the inner flap (6) is bent inward, a chamfered portion (8) is formed at the base of the inner flap (6), and the outer flap (7) is bent inward to form the inner flap ( The weakened portion of the side edge of 6) is pressed by the base of the outer flap (7) and bent downward, and the outer flap (7) is bent inward so as to overlap the bent portion, and the outer flap A corrugated cardboard box, which is characterized in that the chamfered portion (9) of the base portion of (7) is inclined .   The corrugated cardboard box according to claim 1, wherein as the weakening process, a cut line (21, 22, 23) or a half cut line is formed in which all cuts are intermittently formed in a perforation. .   The corrugated cardboard box according to claim 1, wherein a ruled line (24, 25, 26) obtained by crushing the cardboard into a line is inserted as the weakening process.   As the weakening process, the stepped weakening portion (27) was formed by crushing the core of the corrugated cardboard in the portion defined by the oblique fold line (10) and the side fold line (11) at the side end of the inner flap. A cardboard box for preventing swelling of the body according to claim 1.

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