JP6849463B2 - Box sheet - Google Patents

Description

The present invention relates to a box sheet.

For example, various boxes formed from paper sheets such as corrugated cardboard are widely used as packaging containers for accommodating various products.

Among such boxes, a sheet in which a pair of short side walls and a pair of long side walls are alternately connected is bent and connected in a square cylinder shape, and inner flaps extending from the upper and lower edge edges of the short side walls are provided. A type (A type) that seals the upper and lower openings of the square tubular part by bending each toward the inside of the square tubular part and folding the outer flaps extending from the upper and lower edges of the long side side walls to the outside of the inner flap. The so-called mandarin orange box type) box body is particularly widely used.

The A-type box body maintains the sealed state by attaching an adhesive tape along the seams of the outer flaps and by adhering the inner flaps and the outer flaps with glue. When opening a box in which the inner flap and outer flap of a general A-type box are pasted together with glue, the outer flap is placed inside by putting a fingernail between the inner flap and the outer flap. It is necessary to peel it off from the flap, and opening the box is not easy.

Therefore, in Japanese Patent Application Laid-Open No. 2008-105690, in order to facilitate the opening of the box body in which the outer flap is attached to the inner flap, a pair extending from the tip edge in a region that does not overlap with the inner flap when the outer flap is assembled. It has been proposed to form a push-bending portion that is formed by a notch and a crease connecting the tips of the pair of notches and can be pushed inside the box body. According to this configuration, it is possible to insert a hand into the opening formed by pushing the push-bent portion into the inside of the box body, grasp the tip portion of the outer flap facing each other, and peel it off from the inner flap.

However, in the configuration described in the above publication, since the push-bent portion is formed on the top surface of the box body, an external force acts unintentionally when the box should be handled while maintaining the sealed state, for example, during transportation. There is a risk that the push-bent part will be pushed in. If an opening is formed in the box body by such an unintended pushing of the pushing / bending portion, the risk of foreign matter being mixed in increases.

Further, in the configuration described in the above publication, it is necessary to form a push-bending portion at the tip of the outer flap located between the pair of inner flaps in the assembled state. Therefore, since the central portion of the tip edge of the outer flaps facing each other is gripped and the outer flaps are simultaneously peeled off from the pair of inner flaps, a considerably large force is required for this work.

Japanese Unexamined Patent Publication No. 2008-105690

In view of the above circumstances, it is an object of the present invention to provide a box sheet capable of forming a box body in which the outer flap glued to the inner flap can be easily peeled off.

The box sheet according to the present invention made to solve the above problems is formed from one sheet, can be assembled so as to form a box body, and is a pair of lengths connected in a square tubular shape in the assembled state. A side side panel, a pair of short side panels, a pair of outer flaps extending from the upper edge of the long side panel, and the tip edges abutting each other in the assembled state, and a pair of outer flaps extending from the upper edge of the short side panel. A box sheet provided with a pair of inner flaps that are stacked inside the outer flaps in the unfolded and assembled state, and in an area arranged below the tip edge of the outer flaps in the assembled state, the short side side panel. The opening start portion is formed so as to straddle the inner flap and can be pushed into the inside of the box body, and the opening start portion is formed straddling the short side side panel and the inner flap. A pair of start cut lines, a first start bend line formed on the inner flap so as to connect between the ends of the pair of start cut lines parallel to the base end edge of the inner flap, and the short The side side panel is defined by a second start bend line formed to connect between the ends of the pair of start cut lines parallel to the upper edge of the short side panel. ..

The box body formed by assembling the box sheet has the pair of start portion cutting lines, the first start portion bend line, and the second start portion bend line below the end of the seam at the tip edge of the outer flap. Since it has an opening start portion that can be pushed inside the box body, it is possible to insert a finger into the recess formed by pushing the opening start portion and grip the side edge tip corner portion of the outer flap. .. As a result, the corners of the side edges of the outer flaps can be easily pulled up, and the outer flaps can be peeled off from the inner flaps in order from the corners of the side edges of the outer flaps, so that the outer flaps are relatively small. It can be peeled off from the inner flap by force. In this way, the box sheet can form a box body in which the outer flap glued to the inner flap can be easily peeled off.

In the box sheet, the opening start portion further provides a third start portion bend line parallel to the second start portion bend line between the upper edge of the short side side panel and the second start portion bend line. It is preferable to have. According to this configuration, since the opening start portion can be pushed in so as to fold the third start portion bending line in a valley, the opening start portion can be pushed in more easily and the side edge tip corner portion of the outer flap can be gripped. It is possible to more reliably form a space in which a finger can be inserted in order to do so.

In the box sheet, it is preferable that the third start portion bending line is a half-cut line obtained by cutting only the back surface side of the sheet. According to this configuration, the sheet can be more reliably valley-folded along the third start portion bending line, so that the opening start portion can be pushed in more easily and the side edge tip corner portion of the outer flap can be formed. It is possible to more reliably form a space in which a finger can be inserted for gripping. Further, by setting the third start portion bending line for valley folding of the sheet as the half-cut line, for example, the first start portion bending line and the second start portion bending line for folding the sheet in a mountain fold are pressed against the back surface of the sheet. In the case of forming the ruled line, the third start portion bending line, the first start portion bending line, and the second start portion bending line can be formed at the same time.

In the box sheet, it is preferable that the outer flap has a knob portion bending line formed from the vicinity of the opening start portion side end portion of the tip edge to the vicinity of the tip end portion of the opening start portion side side edge. According to this configuration, the knob portion bending line defines a small triangular knob portion having the apex of the side edge tip corner of the outer flap that is gripped by inserting a finger into the recess formed by the opening start portion. .. Therefore, the outer flap can be more easily peeled off from the inner flap by first raising the knob portion to the outside of the box body and firmly grasping the knob portion again.

In the box sheet, it is preferable that the outer flap has an opening bending line formed from the vicinity of the base end of the side edge on the opening starting portion side to a position farther from the opening starting portion than the center of the tip edge. According to this configuration, by inserting a finger into the recess formed by the opening start portion and pulling up the side edge tip corner portion of the outer flap, the outer flap is bent along the opening bending line and the outer flap is opened. It can only be peeled off from the inner flap on the start side. This makes it easier to peel off the outer flap from the inner flap on the opening start side, and also forms an opening that allows the hand to reach a portion of the opening folding line that does not overlap with the inner flap. It is also easy to peel off the outer flap from the inner flap on the opposite side of the opening start.

The term "neighborhood" means a region in which the distance from the reference position is 0.3 times or less the average width of the short side side panel.

As described above, the box sheet of the present invention can form a box body in which the outer flap glued to the inner flap can be easily peeled off.

It is a schematic plan view (development view) which shows the box sheet of one Embodiment of this invention. It is a schematic perspective view which shows the sealed state of the box body which assembles the box sheet of FIG. It is a schematic perspective view which shows the first process of opening a box body of FIG. It is a schematic perspective view which shows the next process of FIG. 3 of opening the box body of FIG. It is a schematic perspective view which shows the next process of FIG. 4 of opening the box body of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[Box sheet]
FIG. 1 shows a box sheet according to an embodiment of the present invention. The box sheet is formed from a single sheet and can be assembled to form the box body shown in FIG. In FIG. 1, a thick solid line indicates an edge obtained by cutting the sheet, a thin solid line indicates a ruled line formed by pressing a streak on the back surface side of the sheet, and a thin alternate long and short dash line indicates a half obtained by cutting only the back surface side of the sheet. Shows the cut line.

As the sheet forming the box sheet, for example, a corrugated cardboard sheet, a plastic board, a cardboard, or the like can be used, and among them, the corrugated cardboard sheet is preferably used.

The corrugated cardboard sheet may be not only one in which both sides of one core are sandwiched between a pair of liners, but also a so-called double flute in which the cores are sandwiched between three liners. It may be a so-called single-sided corrugated cardboard in which a liner is attached only to one side of the corrugated cardboard.

The box sheet includes a pair of long side side panels (first long side side panel 1 and second long side side panel 2) and a pair of short side side panels (first) that are connected in a square cylinder shape in the assembled state. It has a short side side panel 3 and a second short side side panel 4). More specifically, the first long side side panel 1, the first short side side panel 3, the second long side side panel 2 and the second short side side panel 4 are connected in this order in the left-right direction, and the first long side side panel On the side opposite to the first short side side panel 3 of 1, a glue margin 5 to be attached near the side edge opposite to the second long side side panel 2 of the second short side side panel 4 is connected. ..

Further, the box sheet extends from the upper edges of the first long side side panel 1 and the second long side side panel 2, and a pair of outer lid flaps (outside the first lid) in which the tip edges are abutted against each other in the assembled state. A pair of flaps 6 and second outer lid flaps 7) and a pair extending from the upper edges of the first short side side panel 3 and the second short side side panel 4 and stacked inside the lid outer flaps 6 and 7 in the assembled state. It is provided with an in-lid flap (a first in-lid flap 8 and a second in-lid flap 9).

Further, the box sheet extends from the lower edges of the first long side side panel 1 and the second long side side panel 2, and a pair of outer bottom flaps (first outer bottom) in which the tip edges are abutted against each other in the assembled state. A pair of flaps 10 and second outer flaps 11) and a pair extending from the lower edges of the first short side side panel 3 and the second short side side panel 4 and stacked inside the bottom outer flaps 10 and 1 in the assembled state. It is provided with an in-bottom flap (a first in-bottom flap 12 and a second in-bottom flap 13).

The box sheet is folded back between the first long side side panel 1 and the first short side side panel 3, and between the second long side side panel 2 and the second short side side panel 4, respectively, and the glue margin 5 is the first. 2 A pair of long side side panels 1 and 2 and a pair of short side side panels 3 by being attached to the back surface of a region near the side edge opposite to the second long side side panel 2 of the short side side panel 4. 4 is connected in an endless tubular shape. The glue margin 5 may be attached to the second short side side panel 4 by using an adhesive or, for example, a stapler or the like.

In the present specification, "upper" and "lower" mean up and down in the assumed general usage mode, and "left-right direction" means an assumption of a box body in which the box sheet is assembled. It means the direction corresponding to the horizontal direction in the general usage mode, but it is not intended to limit the orientation of the box sheet at the time of manufacture or the orientation of the box body obtained by assembling the box sheet. ..

When the box sheet is formed from a corrugated cardboard sheet, the ridgeline of the core is used to improve the buckling strength of the box body in consideration of the possibility of stacking the box bodies formed by assembling the box sheet up and down. Is preferably oriented in the vertical direction, that is, in the direction perpendicular to the connecting direction of the side panels 1, 2, 3, and 4.

In the box sheet, a glue margin 5 is usually attached to the second short side side panel 4, and the first long side side panel 1 and the second short side side panel 4 are the first short side side panel 3 and the second. It is provided to the user in a folded state in close contact with the long side side panel 2. By putting the box sheets in the folded state in this way, a plurality of the box sheets can be stacked and efficiently transported and stored, and the glue margin 5 is attached to the second short side side panel 4 in advance. Therefore, the cardboard box sheet can be easily assembled.

The box body formed by assembling the box sheet is sealed by adhering the inner lid flaps 8 and 9 and the outer lid flaps 6 and 7 with an adhesive G as shown in FIG.

Further, the box sheet is formed in a region arranged below the tip edges of the outer lid flaps 6 and 7 in the assembled state, straddling the first short side side panel 3 and the first inner lid flap 8. , Has an opening start portion 14 that can be pushed inside the box body. That is, the opening start portion 14 may dent the band-shaped region inward, which is in a mountain-folded state (folded outward in a convex shape) in the boxed state of the box body formed by assembling the box sheet. It is configured so that it can be done.

Since the box sheet has the opening start portion 14, the box body formed by assembling the box sheet inserts a finger into the recess formed by pushing the opening start portion 14, as shown in FIG. The corners of the side edges of the outer lid flaps 6 and 7 can be gripped. As a result, the corners of the side edges of the outer lid flaps 6 and 7 can be easily pulled up, and the outer lid flaps 6 and 7 can be peeled off from the first inner lid flap 8 and the side edges of the outer lid flaps 6 and 7. Since the process proceeds sequentially from the tip corner side, the outer lid flaps 6 and 7 can be peeled off from the first inner lid flap 8 with a relatively small force.

<Opening start part>
The opening start portion 14 is a pair of start portion cutting lines (first start portion cutting line 15 and second start portion cutting line 16) formed so as to straddle the first short side side panel 3 and the first inner flap 8. ) And the first start portion formed to connect the ends of the pair of start portion cutting lines 15 and 16 to the first inner flap 8 in parallel with the base end edge of the first inner flap 8. The folding line 17 and the first short side side surface 3 panel are formed so as to connect the ends of the pair of start portion cutting lines 15 and 16 in parallel with the upper edge of the first short side side panel 3. 2 Defined by a start bend line 18.

Further, the opening start portion 14 further has a third start portion bending line 19 parallel to the second start portion bending line 18 between the upper edge of the first short side side panel 3 and the second start portion bending line 18. ..

(Starting cutting line)
The starting portion cutting lines 15 and 16 are symmetrically formed so as to be convexly bent or curved outward in the left-right direction, with the point intersecting the upper edge of the first short side side panel 3 as the apex. As described above, since the start portion cutting lines 15 and 16 are convex outward, the opening start portion 14 can be easily pushed into the box body, and the recess formed by pushing the opening start portion 14 can be formed. You can easily insert your finger.

As the lower limit of the length of the starting portion cutting lines 15 and 16 in the vertical direction, 4 cm is preferable, and 5 cm is more preferable. On the other hand, as the upper limit of the length of the starting portion cutting lines 15 and 16 in the vertical direction, 10 cm is preferable, and 8 cm is more preferable. If the length of the start portion cutting lines 15 and 16 in the vertical direction is less than the above lower limit, it may not be easy to insert a finger into the recess formed by pushing the opening start portion 14. On the contrary, when the length of the starting portion cutting lines 15 and 16 in the vertical direction exceeds the above upper limit, the strength of the box body formed by assembling the box sheet may be unnecessarily reduced.

As the lower limit of the maximum interval between the starting cutting lines 15 and 16, 3 cm is preferable, and 4 cm is more preferable. On the other hand, as the upper limit of the maximum interval of the starting portion cutting lines 15 and 16, 8 cm is preferable, and 6 cm is more preferable. If the maximum distance between the start portion cutting lines 15 and 16 is less than the above lower limit, it may not be easy to grip the side edge tip corner portions of the lid outer flaps 6 and 7. On the contrary, when the maximum distance between the starting portion cutting lines 15 and 16 exceeds the above upper limit, the strength of the box body formed by assembling the box sheet may be unnecessarily reduced.

(1st start part bending line and 2nd start part bending line)
The first start portion bending line 17 and the second start portion bending line 18 may be any one that makes it easy to bend the sheet along the first starting portion bending line 17, but may be formed as a ruled line formed by pressing a streak on the back surface of the sheet. It is preferable because it is easy to use and the decrease in strength of the sheet is relatively small.

The first start portion bending line 17 and the second start portion bending line 18 are for suppressing a decrease in strength of the box body formed by assembling the box sheet and increasing the recess formed by pushing the opening start portion 14. In addition, it is preferable that the lengths are equal to each other.

The lower limit of the length of the first start portion bending line 17 and the second start portion bending line 18 is preferably 1 cm, more preferably 2 cm. On the other hand, as the upper limit of the length of the first start portion bending line 17 and the second start portion bending line 18, 5 cm is preferable, and 4 cm is more preferable. If the lengths of the first start portion bending line 17 and the second start portion bending line 18 are less than the above lower limit, it may be difficult to insert a finger into the recess formed by pushing the opening start portion 14. On the contrary, when the lengths of the first start portion bending line 17 and the second start portion bending line 18 exceed the above upper limit, the strength of the box body formed by assembling the box sheet may be unnecessarily reduced.

The lower limit of the ratio of the distance between the first starting portion bending line 17 and the upper edge of the first short side side panel 3 to the distance between the second starting portion bending line 18 and the upper edge of the first short side side panel 3 is set as the lower limit. 1.2 is preferable, and 1.5 is more preferable. On the other hand, as the upper limit of the above ratio, 3.0 is preferable, and 2.5 is more preferable. If the above ratio is less than the above lower limit, it may not be easy to push the box sheet into the assembled box body. On the contrary, when the above ratio exceeds the above upper limit, the opening start portion 14 becomes larger than the area of the back surface of the outer lid flaps 6 and 7 exposed by the opening start portion 14, so that the outer lid flaps 6 and 7 are exposed. There is a risk that the gripping of the side edge tip corner portion of the box cannot be sufficiently facilitated, and the strength of the box body formed by assembling the box sheet may be unnecessarily reduced.

The lower limit of the distance between the first start portion bending line 17 and the upper edge of the first short side side panel 3 is preferably 1.5 cm, more preferably 1.8 cm. On the other hand, the upper limit of the distance between the first start portion bending line 17 and the upper edge of the first short side side panel 3 is preferably 4.0 cm, more preferably 3.0 cm. When the distance between the first start portion bending line 17 and the upper edge of the first short side side panel 3 is less than the above lower limit, the area of the back surface of the outer lid flaps 6 and 7 exposed by the opening start portion 14 is insufficient. Therefore, it may not be possible to sufficiently facilitate the gripping of the side edge tip corners of the lid outer flaps 6 and 7. On the contrary, when the distance between the bending line 17 of the first start portion and the upper edge of the first short side side panel 3 exceeds the above upper limit, the entire opening start portion 14 becomes large and the box sheet is assembled. Body strength may be unnecessarily reduced.

(Bending line at the 3rd start)
The third start portion bending line 19 may be a line that makes it easy to fold the sheet along the valley, but the start portion cutting line may be a half cut line formed by cutting only the back surface side of the sheet. 15, 16, the point that the first start portion bending line 17 and the second start portion bending line 18 can be processed together from the back surface side of the sheet, and the appearance of the box body obtained by assembling the box sheet are impaired. It is preferable in that there is no such thing.

The distance between the third start portion bending line 19 and the second start portion bending line 18 is preferably equal to the distance between the first start portion bending line 17 and the upper edge of the first short side side panel 3. As a result, when the opening start portion 14 is pushed in and the sheet between the first start portion bending line 17 and the third start portion bending line 19 is stretched in a plane, the sheet in this region becomes the first short side side panel 3. It becomes parallel, and the sheet between the third start portion bending line 19 and the second start portion bending line 18 becomes parallel to the outer lid flaps 6 and 7. Therefore, it becomes easy to insert a finger into the recess formed by pushing the opening start portion 14 to grip the side edge tip corner portions of the lid outer flaps 6 and 7.

<Flap outside the lid>
In the box sheet, the lid outer flaps 6 and 7 are the knob portion bending lines 20 and 21 formed from the vicinity of the opening start portion 14 side end portion of the tip edge to the vicinity of the tip end portion of the side edge on the opening start portion 14 side. It has opening bending lines 22 and 23 formed from the vicinity of the base end of the side edge on the opening starting portion 14 side to a position farther from the opening starting portion 14 than the center of the tip edge.

The box body formed by assembling the box sheet is adhered to the inner flap 8 with the adhesive G in the region between the knob portion bending lines 20 and 21 of the outer lid flaps 6 and 7 and the opening folding lines 22 and 23. It is intended to be sealed by being done.

(Bending line of the knob)
As shown in FIG. 4, the knob portion bending lines 20 and 21 are outside the box body formed by assembling the box sheet, with the corners of the side edges of the outer lid flaps 6 and 7 on the opening start portion 14 side as vertices. Defines a relatively small triangular knob that can be flipped up.

The knob portion bending lines 20 and 21 may be any one that makes it easy to fold the sheet along it, but between a plurality of cutting lines in which the sheets are arranged in a perforated line and the plurality of cutting lines. It is preferable that the lead ruled line has a ruled line formed by pressing a line on the back surface of the sheet so as to be connected. By using the knob portion bending lines 20 and 21 as the lead ruled lines in this way, it becomes easier to flip up the knob portion.

In the box body formed by assembling the box sheet, a finger is inserted into a recess formed by pushing the opening start portion 14, and the corners of the side edges of the lid outer flaps 6 and 7 are gripped to grip the knob portion bending line 20, By flipping up the knob portion defined by 21, the entire knob portion can be gripped. The knob portion that is flipped up to the outside can be gripped more firmly, and it becomes easy to apply a force for peeling the outer lid flaps 6 and 7 from the inner lid flaps 8 and 9. Therefore, the knob portion bending lines 20 and 21 make it easier to open the box body formed by assembling the box sheet.

The knob portion bending lines 20 and 21 are preferably formed so as to be inclined by about 45 ° with respect to the side edges and tip edges of the lid outer flaps 6 and 7 so that the knob portions can be easily gripped efficiently.

The lower limit of the distance between the ends of the knob portion bending lines 20 and 21 and the corners of the side edge tips of the outer lid flaps 6 and 7 is preferably 3 cm, more preferably 4 cm. On the other hand, the upper limit of the distance between the ends of the knob portion bending lines 20 and 21 and the corners of the side edge tips of the lid outer flaps 6 and 7 is preferably 8 cm, more preferably 6 cm. If the distance between the ends of the knob portion bending lines 20 and 21 and the corners of the side edge tips of the lid outer flaps 6 and 7 is less than the above lower limit, the knob portion becomes small and may not be firmly gripped. On the contrary, when the distance between the end of the knob portion bending lines 20 and 21 and the corner of the side edge tip of the lid outer flaps 6 and 7 exceeds the above upper limit, the knob portion is changed to the lid inner flaps 8 and 9 by the adhesive G. It may be glued and it may not be easy to flip up the knob.

(Opening folding line)
As shown in FIG. 5, the opening folding lines 22 and 23 are formed by bending the outer lid flaps 6 and 7 along the opening folding lines 22 and 23 to form the opening opening start portion 14 of the first inner lid flap 8. Allows the outer lid flaps 6 and 7 to be peeled off from the chisel. By bending the outer lid flaps 6 and 7 along the opening bending lines 22 and 23 in this way, an opening is formed between the first inner lid flap 8 and the second inner lid flap 9, and thus this opening. Insert your finger from the lid to grasp the area near the opening folding lines 22 and 23 between the inner lid flaps 8 and 9 of the outer lid flaps 6 and 7, and pull the outer lid flaps 6 and 7 from the second inner lid flap 9. It can be peeled off. That is, the opening folding lines 22 and 23 enable the peeling of the outer lid flaps 6 and 7 from the first inner lid flap 8 and the peeling from the second inner lid flap 9 in a stepwise manner. ..

The opening folding lines 22 and 23 may be any one that makes it easy to fold the sheet along it, but it connects between a plurality of cutting lines in which the sheets are arranged in a perforated line and the plurality of cutting lines. It is preferable that the lead ruled line has a ruled line formed by pressing a streak on the back surface of the sheet. By using the opening and folding lines 22 and 23 as the lead ruled lines in this way, the gradual peeling of the outer lid flaps 6 and 7 from the first inner lid flap 8 and the second inner lid flap 9 becomes more reliable.

The lower limit of the distance between the side edge side ends of the lid outer flaps 6 and 7 of the opening folding lines 22 and 23 and the upper edge of the long side side panels 1 and 2 is the average thickness of the sheets forming the box sheet. 1 times is preferable, and 2 times is more preferable. On the other hand, the upper limit of the distance between the side edge side ends of the lid outer flaps 6 and 7 of the opening folding lines 22 and 23 and the upper edges of the long side side panels 1 and 2 is preferably 30 mm, more preferably 20 mm. If the distance between the side edge side ends of the lid outer flaps 6 and 7 of the opening folding lines 22 and 23 and the upper edge of the long side side panels 1 and 2 is less than the above lower limit, the opening folding is performed when the box sheet is assembled. The wires 22 and 23 may bend and hinder assembly. On the contrary, when the distance between the side edge side ends of the lid outer flaps 6 and 7 of the opening folding lines 22 and 23 and the upper edge of the long side side panels 1 and 2 exceeds the above upper limit, the lid outer flaps 6 and 7 are used. The position where the force is most easily transmitted when peeling from the first inner lid flap 8 is actually adhered by the adhesive G from the vertical line from the corner to the opening bending lines 22 and 23 that grip the outer lid flaps 6 and 7. If the distance is increased, the flaps 6 and 7 outside the lid may not be easily peeled off.

It is preferable that the ends of the opening folding lines 22 and 23 on the tip edge side of the lid outer flaps 6 and 7 are close to the position where they overlap with the tip edge of the second lid inner flap 9 in the assembled state. The upper limit of the distance between the tip edge side ends of the lid outer flaps 6 and 7 of the opening folding lines 22 and 23 and the position where the tip edge of the second lid inner flap 9 overlaps is preferably 5 cm, more preferably 2 cm. Assuming that the end of the opening folding lines 22 and 23 on the tip edge side of the lid outer flaps 6 and 7 is on the opening start portion 14 side beyond the position where the tip edge of the second lid inner flap 9 overlaps the above upper limit, the first lid The opening formed between the inner flap 8 and the second lid inner flap 9 becomes smaller, and the peeling of the lid outer flaps 6 and 7 from the second lid inner flap 9 may not be facilitated. On the contrary, the end portion of the opening folding lines 22 and 23 on the tip edge side of the lid outer flaps 6 and 7 exceeds the above upper limit from the position where it overlaps with the tip edge of the second lid inner flap 9 and is opposite to the opening start portion 14. Then, when the outer lid flaps 6 and 7 are peeled off from the first inner lid flap 8, the force is most easily transmitted from the corners that grip the outer lid flaps 6 and 7 to the opening bending lines 22 and 23. If the position where the agent G is adhered becomes far away, it may not be easy to peel off the flaps 6 and 7 outside the lid.

As described above, the box body formed by assembling the box sheet can grip the side edge tip corners of the lid outer flaps 6 and 7 by inserting a finger into the recess formed by pushing the opening start portion 14. Because it can be done, it can be opened relatively easily. Further, since the opening start portion 14 is covered with the flaps 6 and 7 outside the lid, it is difficult to be pushed in unintentionally during transportation and the like, and the formation of an opening is prevented, so that the article to be stored is excellently protected.

[Other Embodiments]
The above embodiment does not limit the configuration of the present invention. Therefore, in the above-described embodiment, the components of each part of the above-described embodiment can be omitted, replaced or added based on the description of the present specification and common general technical knowledge, and all of them are construed as belonging to the scope of the present invention. Should be.

In the box sheet, even if the third start portion bending line of the opening start portion is omitted, the opening start portion can be pushed in by strongly pressing the sheet. Therefore, the third start portion bending line is indispensable. Absent.

In the box sheet, the knob portion bending line and the opening folding line may be omitted.

In the box sheet, the structure of the bottom portion may be another structure such as a one-touch type or an American lock type.

The box sheet can be particularly preferably used for an A-type corrugated cardboard box that is sealed without using an adhesive tape.

1 1st long side side panel 2 2nd long side side panel 3 1st short side side panel 4 2nd short side side panel 5 Glue margin 6 1st lid outer flap 7 2nd lid outer flap 8 1st lid inner flap 9 2nd lid inner flap 10 1st bottom outer flap 11 2nd bottom outer flap 12 1st bottom inner flap 13 2nd bottom inner flap 14 opening start part 15 1st start part cutting line 16 2nd start part cutting line 17 1st Start Bending Line 18 2nd Starting Bending Line 19 3rd Starting Bending Line 20, 21 Knob Bending Line 22, 23 Opening Bending Line G Adhesive

Claims (3)

Formed from a single sheet, can be assembled to form a box,
A pair of long-sided side panels and a pair of short-sided side panels that are connected in a square tube shape in the assembled state,
A pair of outer flaps that extend from the upper edge of the long side side panel and the tip edges are abutted against each other in the assembled state.
A box sheet having a pair of inner flaps extending from the upper edge of the short side side panel and stacked inside the outer flaps in an assembled state.
In the area arranged below the tip edge of the outer flap in the assembled state, the opening start portion formed over the short side side panel and the inner flap and can be pushed inside the box body is provided.
The opening start part is
A pair of start cutting lines formed straddling the short side side panel and the inner flap,
Above the flap, and the first start portion folding line that will be formed to connect between ends of the parallel the pair of beginning cutting line on the proximal end edge of the inner flap,
The short side side panel is defined by a second start bend line formed to connect between the ends of the pair of start cut lines parallel to the upper edge of the short side panel .
The opening start portion has a third start portion bend line parallel to the second start portion bend line between the upper edge of the short side side panel and the second start portion bend line.
In the assembled state in which the outer flap and the inner flap are adhered to each other, the area between the opening start portion and the first start portion bending line and the third start portion bending line is parallel to the short side side panel. The region between the third start portion bending line and the second start portion bending line is provided so as to be formed in a recess parallel to the outer flap.
A box sheet characterized in that the outer flap has a knob portion bending line formed from the vicinity of the opening start portion side end portion of the tip edge to the vicinity of the tip end of the opening start portion side side edge. The box sheet according to claim 1 , wherein the third start portion bending line is a half-cut line obtained by cutting only the back surface side of the sheet. Said outer flap, according to claim 1 or claim 2 having a tear fold line formed toward a position distant from the open trigger than the center of the leading edge from the proximal end near the side edge of the unsealing start part side Box sheet.

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