JP2008132990A - Nonstapled corrugated cardboard box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain the bottom surface of a corrugated cardboard carton which can be easily and firmly closed, and dispenses with a staple. <P>SOLUTION: On the bottom surface of this nonstapled corrugated cardboard box 1, U-shaped cuts 4 and 4 directed toward the folding side of opposed short-side flaps are formed on opposed short-side flaps 3 and 3 sides of opposed long-side flaps 2 and 2, respectively. A slot 5 is formed in such a shape that the outside cutting width of each of the U-shaped cuts 4 and 4 is almost equivalent to the board width of the corrugated cardboard box 1. Two counter rectangular pieces 6 and 6 with widths which enable insertion into the U-shaped cuts 4 and 4 are formed at tips of the flaps 3 and 3, respectively. A tongue piece 7 capable of being inserted into the slot 5 with the board width is provided at each of outsides of the rectangular pieces 6 and 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a corrugated cardboard box that can be easily closed without using staples at least at the contact edge of the bottom plate flap.

  Conventionally, when the upper lid of the cardboard box for export or moving is closed with tape or staples, it is not possible to check the packaged items for export, and it is not possible to perform the unpacking service at the move destination.

Therefore, as shown in FIG. 7, in the corrugated cardboard box which constitutes the upper lid and the lower lid with the flaps protruding from the respective sides of the outer peripheral wall surrounding the four sides, a pair of first flaps facing each other among the flaps constituting the upper lid. While providing insertion holes b and b on both sides of a, a pair of insertion parts d and d to be inserted into the insertion hole b are provided on a pair of second flaps c adjacent to the first flap a, and at least any Protruding piece e projecting in a direction substantially perpendicular to the insertion direction of the insertion part d beyond the edge of the insertion hole b is provided in one of the insertion parts d,
A corrugated cardboard box has been developed in which the protruding piece e is folded so as to overlap the insertion part d, and the insertion part d is inserted into the insertion hole b and closed (for example, Patent Document 1).

Japanese Patent Laid-Open No. 2003-20027

  However, the insertion holes b are formed on both sides of the conventional first flap a shown in FIG. 7, and the insertion holes b are for long insertion with the long edge (contact edge) f of the flap a. This is different from a slit which is a long hole and the insertion hole b has a necessary width t and is longer than the width t and has no width t.

  Then, a break line L is formed at one end of the insertion hole b, and the break line L is not a single cut line but a line in which cut portions s and non-cut portions s' are alternately continuous. Then, it tears manually and breaks.

  Therefore, the insertion part d formed on the second flap c bent in the direction orthogonal to the first flap a and the projecting piece e orthogonal thereto are inserted under the first flap a from the insertion hole b of the first flap a. In doing so, first the tear line L composed of the cut part s and the non-cut part s ′ is torn, and the projecting piece e is inserted into the tear break line L from above, and then the insertion part d of the second flap c. Had to be inserted into the lower surface from the upper surface of the insertion hole b of the first flap a.

  At that time, it is necessary to form a triangular notch piece G by the insertion hole b and the breaking line L and press the triangular notch piece G to insert the protruding piece e and the insertion part d. And the above-mentioned triangular notch G and the portal insertion part d are insufficiently polymerized and the engagement between the insertion hole b having the width t and the portal insertion part d is the width t Therefore, there was a problem that it was easy to open.

  SUMMARY OF THE INVENTION An object of the present invention is to obtain a non-staple cardboard box having a bottom face that can be easily engaged with a first flap and a second flap and is firmly closed.

In order to achieve the above object, the present invention firstly forms a U-shaped cut on the bottom side of the opposing long side flap on the bottom side of the opposing long side flap toward the folding side of the opposing short side flap on the bottom surface of the cardboard box, The outer cut width of the U-shaped cut is substantially an elongated hole having a plate width of the corrugated cardboard box, and two opposed rectangular pieces having a width that can be inserted into the U-shaped cut are formed at the respective ends of the opposed short side flaps, and A non-staple cardboard box in which tongue pieces that can be inserted into the plate width elongated holes are provided on the outer sides of the opposing rectangular pieces,
Secondly, the non-staple cardboard box according to the first invention, wherein the length from the base folding curve of the opposing short side flap to the tip cut of the U-shaped cut is slightly longer than the tip of the opposed square piece,
Third, the non-staple cardboard box according to the first or second invention, wherein a fold line is formed at the base end of the opposing rectangular piece,
Consists of.

  Therefore, the tongue piece outside the rectangular piece of the short side flap is inserted into the long hole outside the U-shaped cut formed in the long side flap.

  In this state, the square piece is manually squeezed down to reduce the U-shaped cut formed in the long side flap, and the leading edge of the square piece is caused by the elasticity of the corrugated paper of the short side flap. At the same time, the tongue piece enters the lower surface and engages with the lower surface of the long side flap.

  Since the present invention is configured as described above, the rectangular piece formed on the short side flap and the tongue piece formed on the outside of the rectangular piece are quickly formed from the upper surface of the U-shaped cut formed on the long side flap to the lower surface of the long side flap. It has an effect that it can be easily polymerized and the bottom side of the corrugated cardboard box can be blocked in a non-staple and non-staple shape with difficulty in opening.

  The bottom surface of the rectangular cardboard box 1 is directed upward as shown in FIGS. 1 to 4, and opposed short side flaps 3 and 3 are provided on both sides of the opposed long side flaps 2 and 2, respectively.

  As shown in FIG. 1, a U-shaped cut 4 directed toward the folding lines 3 'and 3' is provided on the folding lines 3 'and 3' side (both sides) of the opposed short side flaps 3 and 3 of the long side flaps 2 and 2, respectively. , 4 are formed.

  The width of the outer cut of the U-shaped cuts 4 and 4 is a long hole 5 substantially equal to the plate width (plate thickness) of the cardboard box 1.

  Two U-shaped notches 4 formed by projecting two opposing rectangular pieces 6 and 6 at the tips of the short-side flaps 3 and 3 and forming the rectangular pieces 6 and 6 in the long-side flaps 2 and 2, respectively. , 4 can be inserted with substantially the same width.

  The rectangular pieces 6 and 6 are respectively formed with tongue pieces 7 and 7 on the outside in a lateral direction, and the tongue pieces 7 and 7 are bent against the elasticity along the fold line 7 'to obtain the plate width (plate thickness). When inserted into the long holes 5, the tongues 7, 7 open outwardly due to elasticity and expand to the lower surfaces of the long side flaps 2, 2 as shown in FIG. 4.

  In this state, the rectangular pieces 6 and 6 are respectively brought into contact with the upper surfaces 4 ″ and 4 ″ of the U-shaped cuts 4 and 4 and pressed downward by hand to thereby form the rectangular pieces 6 and 6 and the tongue pieces 7 and 7. Is inserted under the long side flaps 2 and 2 from the U-shaped cuts 4 and 4 and polymerized.

  Thereafter, the U-shaped cut upper surfaces 4 ″ and 4 ″, the square pieces 6 and 6 and the tongue pieces 7 and 7 are pressed down by the container S, and the bottom surface of the container S is fixed as shown in FIG. Hold. (The state is shown in FIG. 4)

  The length W from the base folding line 3 ′ of the short side flap 3 to the tip of the rectangular piece 6 is slightly longer than the length w from the folding line 3 ′ to the U-shaped cut 4, and the difference is H (W− w) is overlapped or engaged with the lower surface of the long-side flap 2, and both the flaps 2 and 3 are closed.

  At the time of the superposition or engagement, the square piece 6 is slightly bent from the fold line 6 ′ formed at the base end portion of the square piece 6 and superposed on the lower part of the long side flap 2.

  In the figure, 8 and 9 are side plates of the cardboard box 1, 11 and 12 are upper surface flaps, and 4 ′ is a base fold line of the U-shaped cut 4.

In the present invention, since the bottom plate is tightly closed, it is not necessary to stap the contact edges 2 'and 2' of the opposed long sides 2 and 2 of the bottom plate, and a safe bottom plate of the cardboard box 1 can be obtained.

It is a perspective view which shows the state which opened the bottom face of the non-staple cardboard box of this invention. It is a perspective view which shows the operation state of FIG. It is a top view which shows a closed long side flap and an open short side flap. It is a top view which shows the state which obstruct | occluded the said long and short flaps. It is a top view of the non-staple cardboard box of the present invention. FIG. 6 is a partially enlarged plan view of FIG. 5. It is a partial development view of a conventional cardboard box.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Corrugated cardboard box 2 Opposite long side flap 3 Opposite short side flap 4 U-shaped cut 5 Long hole 6 Opposite square piece 7 Tongue piece

Claims (3)

On the bottom side of the corrugated cardboard box, on the opposing short side flap side of the opposing long side flap,
Form a U-shaped cut toward the folding side of the opposing short side flap,
The outer cut width of the above U-shaped cut is a slot that is approximately the width of the cardboard box,
Two opposing rectangular pieces of a width that can be inserted into the U-shaped notch are formed at the tips of the opposing short side flaps,
And a non-staple cardboard box in which tongue pieces that can be inserted into the plate-width elongated holes are provided on the outer sides of the opposing rectangular pieces.   2. The non-staple cardboard box according to claim 1, wherein the length from the base folding curve of the opposed short side flap to the leading edge cut of the U-shaped cut is slightly longer than the length of the opposed rectangular piece.   The non-staple cardboard box according to claim 1 or 2, wherein a fold line is formed at a base end portion of the opposing rectangular piece.

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