JP2008265773A - Corrugated cardboard box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a corrugated cardboard box having a cushioning function and solving the problem that a corrugated cardboard box with a cushioning function needs to be exclusively designed according to the size and shape of an article to be packed and the structure is complicated to complicate the processing and assembly of it. <P>SOLUTION: An upper opening/closing face U includes a pair of cushioning inner flaps 6 and 7 extending from basal ends which are the upper edges of end walls 2 and 3 respectively, and a pair of outer flaps 8 and 9 extending from base ends which are the upper edges of side walls 4 and 5 respectively. Additionally, in the sealed position, the cushioning inner flaps 6 and 7 are held in the box so as to be separated from the outer flaps 8 and 9 that cover the outside of the inner flaps 6 and 7. The cushioning inner flaps 6 and 7 have: base end parts 6B and 7B bent inside the box so as to have acute angles to the end walls 2 and 3 respectively in the sealed position; leading end portions 6F and 7F bent opposite the bent direction of the base end parts 6b and 7b in the sealed position and extending along the outer flaps 8 and 9 that cover the outside of the inner flaps 6 and 7; and locking parts 6a and 7a locked in the opposite cushioning inner flaps in the sealed position. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a corrugated cardboard box, and more particularly to a corrugated cardboard box in which a part of the corrugated cardboard box can be used as a cushioning material for unpackaged items.

Conventionally, when packing an object to be packed whose volume is smaller than the inner volume of the cardboard box, the buffer is made by sandwiching or packing a cushioning material made of paper or polystyrene foam into the gap between the object to be packed and the inner surface of the cardboard box. I was fixing things. In such a fixing method using a cushioning material, there is room for improvement in material cost, workability at the time of packaging, and the like. As a measure for the improvement, a part of the cardboard box is cushioned. There have been proposals for use as an alternative to the above.
JP 2002-12219 A

However, the conventional cardboard box with a buffer function has a problem that it has to be designed exclusively in accordance with the size and shape of the packaged item. Further, since the structure is complicated, there is a problem in that processing and assembly work are complicated. Further, due to these problems, the increase in cost is also a problem.
Therefore, the main problem of the present invention is to solve these problems.

The present invention that has solved the above problems is as follows.
In the present invention, front / rear / up / down / left / right means a direction in which one side wall from which one outer flap extends in the sealed state is front (front), and the description of the invention. It is determined for the sake of convenience, and does not mean the direction when used as a product.

<Invention of Claim 1>
A polygonal cylindrical non-opening / closing surface comprising at least three side surfaces;
A pair of opening and closing surfaces that respectively open and close the upper opening and the lower opening of the non-opening surface,
At least one of the open / close surfaces includes an inner flap extending from an edge adjacent to the open / close surface of the upper and lower edges of at least two side surfaces, and the upper and lower edges of at least one side surface. It consists of an outer flap extended from the edge adjacent to the opening / closing surface of the edge as a base end, and is configured to be sealed with the outer flap covered on the outer side of the inner flap, and in a sealed state, The inner flap is a cardboard box configured to be a buffer inner flap that is held at a position spaced inside the box with respect to the outer flap covering the outer side,
Each of the in-buffer flaps is bent in a reverse direction to the bending direction of the base end portion in the sealed state, and a base end portion that is bent inside the box so as to form an acute angle with respect to a side surface portion that is continuous with the base end in the sealed state. A distal end portion extending along an outer flap that covers the outside and a locking portion that is locked to another buffered inner flap in the sealed state.
A cardboard box characterized by that.

(Function and effect)
The present invention intends to form a shock absorber in contact with an object to be packed by using a so-called inner flap. Characteristically, in the corrugated cardboard box configured as described above, the folding angle between the base end portion of the buffer inner flap and the side surface connected to the base end, and the bending angle between the front end side portion and the base end portion are changed. In addition, the buffered inner flap can be moved closer to or away from the outer flap covering the outer side thereof, in other words, the thickness of the buffered portion located between the box and the packaged item can be changed. Moreover, since the folded portion of the cardboard has a restoring action due to the material itself, the thickness of the buffer portion formed by the flap in the buffer according to the size and shape of the packaged object when packing is within the predetermined range. Is automatically adjusted. In addition, as can be seen from this automatic adjustment action, the cushioned flap is urged to press the packed object by the restoring action of the bent part, and the contact from the packaged object is maintained while maintaining contact with the packed object. Shock can also be buffered.

<Invention of Claim 2>
A rectangular tube-shaped non-opening / closing surface comprising a pair of left and right end walls and a pair of front and rear side walls;
A pair of opening and closing surfaces that respectively open and close the upper opening and the lower opening of the non-opening surface,
At least one of the open / close surfaces includes a pair of inner flaps that extend from the upper edge and the lower edge of the end walls as the base edges, and the upper and lower edges of the side walls. A pair of outer flaps each extending from the edge adjacent to the opening / closing surface as a base end, and configured to be sealed in a state where both outer flaps are overlapped on the outer sides of both inner flaps; and In a sealed state, the inner flaps are cardboard boxes configured to be buffer inner flaps held at positions separated from the inner side of the box with respect to both outer flaps covering the outer sides,
Each of the in-cushion flaps is bent in a direction opposite to the bending direction of the base end portion in the sealed state, and a base end portion bent inward of the box so as to form an acute angle with respect to an end wall connected to the base end in the sealed state. A distal end portion extending along an outer flap that covers the outside and a locking portion that is locked to a buffered inner flap that faces in the sealed state.
A cardboard box characterized by that.

(Function and effect)
The invention described in this section is intended for a general hexahedral cardboard box, and even in this case, the above-described advantages of the present invention are brought about.

<Invention of Claim 3>
Among the pair of buffer inner flaps, as the locking portion in one buffer inner flap, a plurality of projecting portions are provided at intervals along the leading edge of one buffer inner flap, and the other buffer inner flap The corrugated cardboard box according to claim 2, wherein a protrusion projecting with a width narrower than an interval between a plurality of protrusions in the one buffer inner flap is provided at a tip edge of the other buffer inner flap as the locking portion. .

(Function and effect)
The invention described in this section relates to a preferred form of the locking portion, and directs the tip portions of the pair of shock-absorbing flaps to cross each other, and between the plurality of protrusions of the one shock-absorbing flap, By inserting the protrusion inside the buffer, a restoring action by the material itself acts on the bent portion, the tip of the other buffer inner flap hits the outer surface of the plurality of protrusions of one buffer inner flap, and one buffer inner flap The forces are balanced and locked in a state where the tips between the plurality of protrusions are in contact with the protrusions of the other buffer flap. Therefore, it becomes possible to lock and release it very easily and reliably.

  As described above, according to the present invention, (a) when packing, the thickness of the buffer part formed by the flap in the buffer is automatically adjusted according to the size and shape of the packaged object. Dedicated design that matches the dimensions and shape is not required. (B) The impact from the outside can be buffered while maintaining contact with the packaged goods. (C) Processing and assembly operations are facilitated. (D) Low cost. And so on.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 8 show an embodiment of a cardboard box 1 according to the present invention. The cardboard box 1 has a rectangular parallelepiped shape in a sealed state. The cardboard box 1 has a rectangular cylindrical non-opening / closing surface composed of a pair of left and right end walls 2 and 3 and a pair of front and rear side walls 4 and 5, and each end wall 2. , 3 and a pair of buffer inner flaps 6 and 7 respectively extending from the upper edge as base ends, and a pair of outer flaps 8 and 9 extending from the upper edges of the side walls 4 and 5, respectively. An American lock type comprising an upper opening / closing surface U configured to be sealed in a state where both outer flaps 8 and 9 are overlapped on the outer sides of both buffer inner and outer flaps 6 and 7, and flaps 10, 11, 12 and 13. And a lower opening / closing surface B.

  Reference numeral 14 denotes an adhesive margin piece for connecting the side portion of the side wall 5 and the side portion of the end wall 2. By connecting the one side wall 5 and the end wall 2 adjacent thereto with the glue margin piece 14, a square cylindrical non-opening / closing surface is formed. Moreover, the dotted line and the dashed-two dotted line in the figure have shown the ruled line for bending.

  The first projecting portions (corresponding to the locking portions) 7a and 7a projecting with a predetermined width W4 in the front-rear direction on both sides in the front-rear direction of the front edge of the one buffer inner flap 7 have a predetermined front-rear direction spacing W3. And a second protrusion that protrudes with a predetermined front-rear width W1 at a position corresponding to the distance between the first protrusions in the front-rear direction. A portion (corresponding to a locking portion) 6a is provided. The protrusions 6a and 7a have a substantially rectangular shape, and the corners on both sides of the tip are cut off in an arc shape. Finger hooks 6b and 6b made of semicircular cutouts are cut out on both sides in the front-rear direction of the leading edge of the other buffer inner flap 6.

  The front-rear width W1 of the second protrusion 6a is preferably equal to or less than the front-rear direction interval W3 of the first protrusions 7a, 7a. The relationship between the front-rear direction width W1 of the second protrusion 6a, the front-rear direction width W4 of the first protrusions 7a, 7a, and the front-rear direction width W5 of the buffer flap 7 is preferably 2. Doubled plus W1 is greater than half W5.

  Moreover, it is preferable that the protrusion length L1 of the 1st protrusion part 7a is 1/40-1/10 of the extension length L2 of one buffer inner flap 7. FIG. The length of the second protrusion 6a is preferably the same as the protrusion length L1 of the first protrusion 7a.

  The width (length in the front-rear direction) L3 of the finger hanging portions 6b, 6b is preferably 2 cm to 4 cm, while the notch depth L4 is preferably 2 cm to 4 cm. L3 and L4 may be designed in any size as long as a finger or a hand can be inserted, and may be larger or smaller than this. However, it is preferable that the finger-hanging portion 6b is provided so as to avoid the portion having the protruding portion 6a and the portion that abuts the protruding portion 7a in the other buffer flap 6.

  When the tips of the buffer inner flaps 6 and 7 are locked together as in this embodiment, the extension length (excluding the protruding portion 7a) L5 of one buffer inner flap 7 and the other buffer inner flap 6 extend. The length obtained by adding the length (excluding the protruding portion 6a) L2 is preferably 1.1 to 1.5 times the length of the lateral width W6 of the side walls 4 and 5. Outside this range, the adjustment range of the thickness of the buffer portion described later becomes too narrow. On the other hand, if it exceeds 1.5 times, the buffer portion becomes too thick for the size of the box. Further, the length obtained by adding the extension length (excluding the protruding portion 7a) L5 of one buffer inner flap 7 and the extension length (excluding the protruding portion 6a) L2 of the other buffer inner flap 6 is the side wall. More preferably, it is 1.2 to 1.4 times the length of the lateral width W6 of 4,5. Further, the extension lengths L2 and L5 of the in-buffer flaps 6 and 7 do not have to be the same, and the ratio can be freely changed according to the position where the leading edges of the in-buffer flaps 6 and 7 abut each other. For example, if the lengths of L2 and L5 are not the same, the positions where the leading edges of the in-buffer flaps 6 and 7 meet are shifted in the left-right direction.

  On the other hand, folding ruled lines 6x and 7x for bending the buffer flaps 6 and 7 toward the outside of the box are formed in the buffer flaps 6 and 7, respectively. The folding ruled lines 6x and 7x extend in the front-rear direction and are formed in parallel with the upper end edges of the end walls 2 and 3. The proximal end sides 6B and 7B of the bent ruled lines 6x and 7x correspond to the proximal end portion of the present invention, and the distal end sides 7F and 7F of the folded ruled lines 6x and 7x correspond to the distal end side portion of the present invention.

  The separation distances L6 and L7 between the base edge and the folding ruled lines 6x and 7x in the buffer inner flaps 6 and 7 can be determined as appropriate. The separation distance L6 is preferably in the range of 5 mm to 25 mm. The separation distance L7 is preferably in the range of 5 mm to 25 mm. These separation distances are preferably the same, but can be different if necessary. If the distance L6 is too short, there is a problem that processing becomes difficult. If it is too long, the gap between the buffer flaps 6 and 7 and the outer flaps 8 and 9 at the time of sealing becomes too large. There are problems.

On the other hand, in the cardboard box 1 configured as described above, when the upper opening / closing surface U is sealed, as shown in FIGS. 3 and 4, the base end portions 6B and 7B of both the buffer inner flaps 6 and 7 are respectively connected to the end walls. 2,3 bent inward at an acute angle theta ₁ with respect to, and the proximal end 6B, the distal portion 6F relative 7B, borders 6x bent 7F, with bent outwardly in 7x, FIGS. 5 and As shown in FIG. 7, between the protrusions 7a, 7a of one of the buffer inner flaps 7, the protrusion 6a of the other buffer inner flap 6 is inserted, and both the buffer inner flaps 6, 7 are crossed and locked. Let Thereby, since the restoring action by the material itself acts on the bent portion, the tip of the other buffer inner flap 6 hits the outer surface of the plurality of projecting portions 7a, 7a of the one buffer inner flap 7, and one buffer inner flap 7a. , 7a, the forces are balanced and locked in a state where the tips between the plurality of projecting portions abut against the projecting portion 6a of the other buffer inner flap 6. Thereafter, as shown in FIG. 6, the upper open / close surface U can be sealed by folding the outer flaps 8 and 9 so as to cover the buffered flaps 6 and 7.

In the cardboard box 1 assembled in this way, the bending angle θ ₁ between the base end portions 6B and 7B and the end walls 2 and 3 of the buffer inner flaps 6 and 7, and the front end side portions 6F and 7F and the base end portion 6B, By changing the bending angle θ ₂ with respect to 7B, as shown by the two-dot chain line in the figure, the buffer inner flaps 6 and 7 are kept on the outer flaps 8 and 9 covering the outer sides while maintaining mutual locking. You can approach and leave. In other words, the thickness T of the buffer portion located between the box and the packaged item can be changed. Moreover, since the bent portion of the corrugated cardboard has a restoring action by the material itself, if it is within a predetermined range, the cushioning portion formed by the cushioning flaps 6 and 7 in accordance with the size and shape of the packaged item when packing. The thickness T is automatically adjusted. Further, as can be seen from this automatic adjustment action, the flaps 6 and 7 in the buffer are urged to press the packed object by the restoring action of the bent portion, and the contact with the packed object is maintained, Shock from outside can also be buffered.

  In addition, the bending angle θ of the base end portions 6B and 7B of both the inner flaps 6 and 7 is an acute angle. If this angle is an obtuse angle, the thickness T of the buffer portion is automatically maintained while maintaining the locked state. This is because it becomes impossible to adjust.

  Further, when opening after sealing, after opening the outer flaps 8 and 9 outward, the fingers are inserted into the finger hooks 6b exposed at the abutting portions of the buffer inner flaps 6 and 7, and the buffer inner flaps 6 and 7 are By shifting in the left-right direction, the buffer flaps 6 and 7 can be easily unlocked and opened.

  On the other hand, in the present embodiment, the lower opening / closing surface B can be sealed with an American lock by the flaps 10, 11, 12, and 13. However, the present invention is not limited to this and depends on non-packaging items. Any known sealing form other than American Rock can be employed.

<Other embodiments>
In the above embodiment, an example of a rectangular parallelepiped corrugated cardboard box has been shown, but the present invention is not limited to this, and may be a cubic shape or other three-dimensional shape. In short, in the sealed state of the opening / closing surface, a folding ruled line and a locking portion are formed on the inner flap of the opening / closing surface, and in the sealed state, the inner flap is bent outward at the folding ruled line, and the locking portion The inner flaps need only be locked together.
Moreover, in the said embodiment, although the buffer inner flaps 6 and 7 and the outer flaps 8 and 9 are provided only in the upper opening and closing surface U, in addition to or instead of this, the same buffer inner flap and An outer flap can also be provided.
Furthermore, in the said embodiment, it comprised so that the front-end | tips of both the buffer inner flaps 6 and 7 might be latched, but it is not restricted to a front-end | tip, The form latched in another site | part can also be taken.

  The present invention can be applied to a cardboard box.

It is an expanded view of the cardboard box concerning the present invention. It is a perspective view which shows the sealing state of a cardboard box. It is a perspective view which shows the middle of the sealing operation | work of a cardboard box. It is a perspective view which shows the middle of the sealing operation | work of a cardboard box. It is a perspective view which shows the middle of the sealing operation | work of a cardboard box. It is a perspective view which shows the middle of the sealing operation | work of a cardboard box. It is AA sectional drawing of a cardboard box. It is BB sectional drawing of a cardboard box.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Cardboard box, 2 ... End wall, 3 ... End wall, 4 ... Side wall, 5 ... Side wall, 6 ... Buffer inner flap, 7 ... Buffer inner flap, 8 ... Outer flap, 9 ... Outer flap, 10 ... Flap, 11 DESCRIPTION OF SYMBOLS ... Flap, 12 ... Flap, 13 ... Flap, 14 ... Paste piece, 6a ... Locking part, 6b ... Finger hook part, 6x ... Bending ruled line, 7a ... Locking part, 7x ... Bending ruled line

Claims (3)

A polygonal cylindrical non-opening / closing surface comprising at least three side surfaces;
A pair of opening and closing surfaces that respectively open and close the upper opening and the lower opening of the non-opening surface,
At least one of the open / close surfaces includes an inner flap extending from an edge adjacent to the open / close surface of the upper and lower edges of at least two side surfaces, and the upper and lower edges of at least one side surface. It consists of an outer flap extended from the edge adjacent to the opening / closing surface of the edge as a base end, and is configured to be sealed with the outer flap covered on the outer side of the inner flap, and in a sealed state, The inner flap is a cardboard box configured to be a buffer inner flap that is held at a position spaced inside the box with respect to the outer flap covering the outer side,
Each of the in-buffer flaps is bent in a reverse direction to the bending direction of the base end portion in the sealed state, and a base end portion that is bent inside the box so as to form an acute angle with respect to a side surface portion that is continuous with the base end in the sealed state. A distal end portion extending along an outer flap that covers the outside and a locking portion that is locked to another buffered inner flap in the sealed state.
A cardboard box characterized by that. A rectangular tube-shaped non-opening / closing surface comprising a pair of left and right end walls and a pair of front and rear side walls;
A pair of opening and closing surfaces that respectively open and close the upper opening and the lower opening of the non-opening surface,
At least one of the open / close surfaces includes a pair of inner flaps that extend from the upper edge and the lower edge of the end walls as the base edges, and the upper and lower edges of the side walls. A pair of outer flaps each extending from the edge adjacent to the opening / closing surface as a base end, and configured to be sealed in a state where both outer flaps are overlapped on the outer sides of both inner flaps; and In a sealed state, the inner flaps are cardboard boxes configured to be buffer inner flaps held at positions separated from the inner side of the box with respect to both outer flaps covering the outer sides,
Each of the in-cushion flaps is bent in a direction opposite to the bending direction of the base end portion in the sealed state, and a base end portion bent inward of the box so as to form an acute angle with respect to an end wall connected to the base end in the sealed state. A distal end portion extending along an outer flap that covers the outside and a locking portion that is locked to a buffered inner flap that faces in the sealed state.
A cardboard box characterized by that.   Among the pair of buffer inner flaps, as the locking portion in one buffer inner flap, a plurality of projecting portions are provided at intervals along the leading edge of one buffer inner flap, and the other buffer inner flap The corrugated cardboard box according to claim 2, wherein a protrusion projecting with a width narrower than an interval between a plurality of protrusions in the one buffer inner flap is provided at a tip edge of the other buffer inner flap as the locking portion. .

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