JP6537375B2 - Corrugated cardboard box with a bulge control crease structure - Google Patents

Description

  The present invention relates to a cardboard box provided with a creased line structure capable of suppressing a cylinder bulging phenomenon due to a loading load.

  In the case of a cardboard box, when a large load is applied, there may be a case where a side bulges so that the side curves in the height direction and a barrel-like appearance having a barrel-like appearance occurs. There has been proposed a cardboard box provided with a ruled line structure which suppresses a body swelling.

  Patent Document 1 describes a cardboard box shown in FIG. 8 in a state of being turned upside down. In this cardboard box, at the boundary between the side wall 51 and the bottom wall 52, there is one axial crease 53 serving as an axis of bending and two lines shifted in parallel in the direction of the side wall 51 and the bottom wall 52 with respect to this. The auxiliary creases 54 are alternately inserted on both sides of the incision 55 which penetrates in the thickness direction of the cardboard. And with the bending of the boundary part of the side wall 51 and the bottom wall 52, the part between two auxiliary creases 54 inclines, and the peripheral part of one axial crease 53 is tightened.

  Patent Document 2 describes a cardboard box shown in FIG. 9 in a state of being turned upside down. In this cardboard box, from the back surface of the corrugated board at the boundary between the side wall 61 and the bottom wall 62, one axial fold line 63 serving as the bending axis and the direction parallel to the side wall 61 and the bottom wall 62 Two misaligned auxiliary creases 64 are alternately inserted, and a half cut 65 interposed therebetween is inserted, and from the surface of the cardboard, parallel along the two parallel auxiliary creases 64 on the back side. Two auxiliary creases 66 are continuously inserted. Then, along with the bending of the boundary portion between the side wall 61 and the bottom wall 62, the portion between the two auxiliary folding lines 64 is inclined, and the peripheral portion of one axial folding line 63 is tightened.

  Patent Document 3 describes a cardboard box made of a blank shown in FIG. In this blank, the bottom wall 72 is continuously provided so as to be sandwiched between the pair of side walls 71, and the top wall 73 is connected to one side wall 71, and the passage piece 74 is connected to the other side wall 71. And while one axial crease line 75 which becomes an axis line of bending is put in these boundary parts, two auxiliary auxiliary crease lines 76 parallel to this are inserted intermittently on both sides of axial crease line 75 There is. The three-line portion in which the axial fold line 75 and the two auxiliary fold lines 76 are arranged is arranged alternately in the length direction on the lower side and the upper side in the assembled state.

  When assembling this blank, the side wall 71, the bottom wall 72 and the top wall 73 are bent so as to wrap the article, and the subjacent piece 74 is bent and attached to the top wall 73. In the three-line portion in which the axial fold line 75 and the two auxiliary fold lines 76 are lined, the portion between the axial fold line 75 and the auxiliary fold line 76 is inclined and sequentially bent.

  In the corrugated box provided with the ruled line structure as described in Patent Documents 1 to 3 above, the bending angle of the auxiliary creased lines 54, 64, 66 and 76 changes even if a large load is applied. Since deformation in the height direction is absorbed, the bulging phenomenon in which the side walls 51, 61, 71 expand is suppressed.

Patent No. 4126201 gazette Patent No. 5460521 gazette Patent No. 5612 591

  However, in a cardboard box provided with a creased structure as shown in FIG. 8, since there is a cut 55 that opens at the time of assembly between one axial crease 53 and two auxiliary creases 54, the sealability and strength are improved. Problems that are disadvantageous in terms of

  Further, in a cardboard box provided with a creased structure as shown in FIG. 9, the auxiliary creased line 64 on the back and the auxiliary creased line 66 on the surface substantially overlap at the time of assembly, so they do not function as separate creases. When the load is weak or when the loading load is quite large, the load may not be absorbed sufficiently, and the side wall 61 may have a liner cut or a zipper score line for opening or an opening window. If it is formed, there is also a possibility that buckling may occur at that portion when a loading load is applied.

  Further, in the corrugated box provided with the creased structure as shown in FIG. 10, since the axial creases 75 penetrate between the two auxiliary creases 76, two auxiliary creases 76 are formed as planned at the time of assembly. There is a possibility that the portion between them does not incline, and the width of the inclined portion is narrow even if inclined, so there is a problem that the displacement can not be absorbed so much and the tightening effect of the right portion by the inclined portion can not be obtained.

  Then, this invention makes it a subject to further prevent the unintended buckling of a side wall while ensuring the sealing property also while improving further the cylinder swelling suppression effect of the corrugated-cardboard box by a creased line structure.

  In order to solve the above problems, according to the present invention, in a corrugated cardboard box in which a side wall and a bottom wall are continuously provided and assembled by bending the boundary portion, one boundary axis of the side wall and the bottom wall serves as an axis of bending. An axial crease and two auxiliary creases offset in the direction of the side wall and the bottom wall are alternately inserted, and a buckling induction crease parallel to the axial crease corresponds to the axial crease. It is an object of the present invention to provide a cylinder provided with a cylinder bulging restraint ruled line structure characterized by being intermittently inserted above an auxiliary fold line on a side wall.

  Further, the buckling induction ruled line has a bending resistance weaker than that of the axial creased line and the auxiliary creased line so as to enhance the buckling induction effect.

  Furthermore, in the portion on the bottom wall side facing the axial creased line, a corrugated cardboard is crushed in the thickness direction to form a stepped collapse where the bending resistance is weakened, and balance of the bending resistance across the axial creased line is taken Thus, during assembly, the side walls and the bottom wall are bent at predetermined positions.

  In the cardboard box provided with the cylinder expansion suppressing creased structure according to the present invention, when the boundary portion between the side wall and the bottom wall is bent in assembling, the side wall and the bottom wall are bent along one axial crease and two The portions between the auxiliary creases are inclined and the peripheral portions of the axial creases are tightened to exert a vertical tension on the side walls.

  When the loading load is applied, the bending angle of the two auxiliary folding lines is changed to prevent the bending deformation in the height direction, and in addition, the side wall along the buckling induction line By bending, the bending deformation in the height direction is prevented.

  Therefore, even when the strength of the corrugated board itself is weak or when the loading load is considerably large, a sufficient effect of suppressing the cylinder expansion can be obtained, and unintended buckling of the side wall is also prevented. In addition, since the boundary between the side wall and the bottom wall is not cut at the time of assembly, sealing of the package is also ensured.

The figure which shows the blank of the corrugated-cardboard box provided with the body expansion suppression line | wire structure which concerns on embodiment of this invention (back side) The enlarged view of the A section of FIG. (A) III (a)-III (a) sectional view of Figure 2, (b) III (b)-III (b) sectional view of Figure 2 Top perspective view showing the assembled state of the same A perspective view from below showing the assembled state same as above (A) VI (a)-VI (a) sectional view of Figure 5, (b) VI (b)-VI (b) sectional view of Figure 5 The figure which shows the deformation state of the VI (a)-VI (a) cross section of FIG. 5 by the loading load same as the above. The perspective view which shows the up-down inversion state of the corrugated-cardboard box provided with the cylinder expansion suppression ruled line structure of patent document 1 The perspective view which shows the up-down inversion state of the corrugated-cardboard box provided with the cylinder expansion suppression ruled line structure of patent document 2 The figure which shows the blank of the corrugated-card-board box provided with the cylinder | bulb bulging suppression ruled line structure of patent document 3

  Hereinafter, embodiments of the present invention will be described based on the attached drawings.

  The cardboard box is of a wrap-round type that is assembled while wrapping articles, and is formed of a blank as shown in FIG.

  In this blank, the bottom wall 2 is continuously provided so as to be sandwiched between the pair of side walls 1, and the top wall 3 and the passage piece 4 are sequentially provided in series on one side wall 1. The step direction, which is the direction in which the step top of the core of the corrugated board extends, is directed in the direction in which these steps are taken into consideration, in consideration of the action direction of the stack load. Further, the inner flaps 5 are connected to both ends of the side wall 1 respectively, and the outer flaps 6 are connected to both ends of the bottom wall 2 and the top wall 3 respectively.

  At the boundary between the pair of side walls 1 and the bottom wall 2, as shown in FIGS. 2 and 3, one axial crease 7 as an axis of bending and the direction of the side walls 1 and the bottom wall 2 Two auxiliary creases 8 which are misaligned are alternately inserted, and a buckling induction crease 9 parallel to the axial creases 7 is intermittently connected to the auxiliary creases of the side wall 1 corresponding to the axial creases 7. It is placed at a position above 8.

  In the shaft folding line 7, the auxiliary folding line 8 and the buckling induction line 9, cuts and joints passing through the corrugated board in the thickness direction are alternately interrupted, and the corrugated board is pressed against the back from the back to insert creases. The bending resistance is set appropriately by adjusting the pitches of the incisions and the connecting portions.

Here, buckling inductive borders 9, the sum of the connecting portion than Jikuori borders 7 and the auxiliary folding border 8 is short, it has become a bending resistance is weak.

  At a portion of the bottom wall 2 facing the axial creased line 7, a step crushing portion 10 is formed in which the corrugated cardboard is crushed in the thickness direction to weaken bending resistance.

  The side wall 1 is provided with a perforated score line 11 for opening, and subsequently, the inner flap 5 is provided with a zipper type score line 11 in which a wedge-shaped cut is interrupted. In the middle part of the score line 11 in the side wall 1, a manual entry hole 12 which is opened with the pressing is formed by inserting a fold line which becomes a score line and a hinge.

  Further, in the side wall 1, flexible ruled lines 13 extending in a V shape in the upward direction from the vicinity of the entry hole 12 and a part of the score line 11 so that the force is easily transmitted by bending at the time of opening. An oblique flexible ruled line 14 extending from the vicinity of the end near the flap 5 to the vicinity of the end of the flexible crease 13 is inserted. The flexible ruled line 13 is a normal ruled line in which the cardboard is pressed from the back surface, and the flexible ruled line 14 is a reverse ruled line in which the cardboard is pressed from the front surface.

  In order to assemble such a blank into the configuration shown in FIGS. 4 and 5 and wrap the article, the boundary portion between the pair of side walls 1 and the bottom wall 2 and the ceiling wall 3 is bent to wrap the article, Passage piece 4 is folded from 3 and attached to the other side wall 1. Then, the inner flap 5 and the outer flap 6 are sequentially bent and attached to each other, and the end face is closed.

  In such a cardboard box as described above, when the boundary portion between the side wall 1 and the bottom wall 2 is bent in assembling, as shown in FIG. 6A, the side wall 1 and the bottom wall along one axial fold line 7 2 is bent at a right angle, and as shown in FIG. 6 (b), the portion between the two auxiliary creases 8 is inclined, the peripheral portion of the axial crease 7 is tightened, and Tension acts.

  In addition, since a stepped crushing portion 10 is formed in the portion on the bottom wall 2 side facing the axial creased line 7 by crushing the cardboard in the thickness direction to weaken the bending resistance, a seat that sandwiches the axial creased line 7 The bending resistances of the bending induction ruled line 9 and the step crushing portion 10 are balanced, and the side wall 1 and the bottom wall 2 are bent at a predetermined position without being pulled to one side at the time of assembly.

  When the loading load is applied, as shown in FIG. 7, the bending angle of the two auxiliary fold lines 8 is changed to prevent the bending deformation in the height direction, and in addition to this, By bending the side wall 1 along the buckling induction crease 9, bending deformation in the height direction is prevented.

  At this time, the buckling induction ruled line 9 is considered to be weaker in bending resistance than the axial creased ruled line 7 and the auxiliary creased line 8, so that the buckling induction effect is enhanced. Moreover, in the part in which the buckling induction ruled line 9 was interrupted, the side wall 1 resists the buckling and the pressure resistance is secured.

  Therefore, even when the strength of the cardboard itself is weak, or even when the loading load is considerably large, a sufficient effect of suppressing the cylinder expansion can be obtained, and the phenomenon that the side wall 1 is buckled along the middle score line 11 is also prevented. Ru. Further, since the boundary portion between the side wall 1 and the bottom wall 2 is not cut open at the time of assembly, the sealing property of the package is also ensured.

  In the above embodiment, the axial creases 7, the auxiliary creases 8 and the buckling induction creases 9 are illustrated as lead creases, but the axial creases 7, the auxiliary creases 8 and the buckling induction creases 9 are as follows. The present invention is not limited to this, and may be formed only of creases in consideration of the thickness and strength of the corrugated cardboard of the material.

  Also, for the plurality of intermittent axial creases 7 in the boundary portion between the side wall 1 and the bottom wall 2, the buckling induction creases 9 are illustrated corresponding to all the axial creases 7, but the buckling induction is illustrated. It is not necessary to insert the ruled lines 9 in correspondence to all the axial creases 7. The application of the buckling induction creases 9 may be omitted with respect to the axial creases 7 located at both ends, or the axial creases 7 may be intermittently made. It may be inserted corresponding to.

  In addition, although a wrap-round type has been illustrated as the type of cardboard box, the inner flaps and the outer flaps are respectively extended from the pair of side walls and end walls forming the peripheral wall, and the inner flaps and the outer flaps are overlapped to form a bottom. A grooved cardboard box forming a wall and a top wall, and a tray-shaped cardboard box formed by raising side walls continuously connected to each side around the bottom wall also adopt the same creased structure. The swelling phenomenon can be suppressed.

DESCRIPTION OF SYMBOLS 1 side wall 2 bottom wall 3 ceiling wall 4 passage piece 5 inner flap 6 outer flap 7 axial fold line 8 auxiliary fold line 9 buckling induction rule line 10 step crushing part 11 score line 12 manual hole 13, 14 flexible crease line

Claims (3)

  In the cardboard box in which the side wall (1) and the bottom wall (2) are continuously connected and assembled by bending the boundary portion thereof, in the boundary portion between the side wall (1) and the bottom wall (2) And alternately insert the two auxiliary folding lines (8) shifted in the direction of the side wall (1) and the bottom wall (2) with the axial folding line (7) And a buckling guide line (9) parallel to the upper and lower sides of the side wall (1) is intermittently inserted above the auxiliary folding line (8) corresponding to the axial folding line (7). Cardboard box with retarded border structure.   The cylinder bulging restraint ruled line structure according to claim 1, characterized in that the buckling induction ruled line (9) has a bending resistance weaker than that of the axial fold ruled line (7) and the auxiliary fold ruled line (8). Cardboard box equipped.   A corrugated part is crushed in the thickness direction to form a step-collapsed part (10) in which bending resistance is weakened at a portion on the bottom wall (2) side facing the axial creased line (7). The corrugated-cardboard box provided with the body swelling suppression creased structure as described in 1 or 2.

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