JP3223812U - Box sheet - Google Patents

Abstract

The present invention provides a box sheet capable of assembling a box body excellent in stability when a plurality of the stacks are used. A pair of long surface panels 1 and a pair of width surface panels 2 that are alternately connected in the left-right direction and assembled in a rectangular tube shape, and a pair of first surfaces extending from the upper edges of the pair of long surface panels. A box sheet that includes a lid flap 3 and a pair of second lid flaps 4 extending from the upper edges of the pair of width surface panels and that can be assembled into a box shape, the first lid flap having a pair of first lid flaps. The foldable line 31 and the second foldable line 41 of the pair of second lid flaps move the first straight part 31a, the connecting part 31b, and the second straight part 31c from one side in the left-right direction to the other side in this order. It is continuously provided, the second straight part is located on the upper edge side from the first straight part, and the length of the first straight part of the first lid flap is 1 to 1.2 times the height of the second lid flap. And the length of the first straight portion of the second lid flap is equal to the height of the first lid flap. Twice or more and 1.2 times or less. [Selection] Figure 1

Description

  The present invention relates to a box sheet.

  Fruits and vegetables such as vegetables and fruits are often formed from cardboard sheets and are transported and stored in a box having an opening at the top.

  As such a box having an opening at the top, a long side wall, a short side wall, a long side wall, and a short side wall are connected in series through a fold line, and an upper lid flap is provided on the upper side of each long side wall, and the upper side of each short side wall A paper rectangular transport case having an insertion piece is known (see Utility Model Registration No. 3171813). In this conventional rectangular transport case, an upper lid fixing flap is connected to each insertion piece, and the upper lid is fixed by inserting and engaging the upper lid fixing flap with an insertion hole provided in the upper lid flap.

Utility Model Registration No. 3171813

  In the conventional rectangular transport case, since the upper lid is fixed in this manner, the insertion piece is positioned on the surface of the upper lid flap, and a step is generated between the surface of the insertion piece and the exposed surface of the upper lid flap. For this reason, in the above-described conventional rectangular transport case, when a plurality of rectangular transport cases are stacked and used, the rectangular transport case stacked particularly on the upper stage may become unstable due to the step.

  This invention is made | formed in view of such a situation, and makes it a subject to provide the sheet | seat for boxes which can assemble the box body excellent in stability at the time of stacking and using a plurality.

  The box sheet of the present invention is formed of a single sheet material, and is alternately connected in the left-right direction and assembled into a rectangular tube shape, a pair of long surface panels and a pair of width surface panels, and the pair of long surfaces A box sheet comprising a pair of first lid flaps extending from the upper edge of the panel and a pair of second lid flaps extending from the upper edge of the pair of width surface panels, which can be assembled into a box shape. The pair of first lid flaps has a first easy-to-bend line that defines a boundary with the pair of long surface panels, and the pair of second lid flaps defines a boundary with the pair of width surface panels. A second easy-to-bend line, and the first easy-to-bend line and the second easy-to-bend line pass the first straight portion, the connecting portion, and the second straight portion from one side to the other side in this order in the left-right direction. The second straight part is continuously provided above the first straight part. The first straight portion of the first lid flap has a length that is not less than 1 and not more than 1.2 times the height of the second lid flap, and the length of the first straight portion of the second lid flap is The length is not less than 1 time and not more than 1.2 times the height of the first lid flap.

  The box sheet of the present invention can be assembled into a box body having excellent stability when a plurality of sheets are stacked and used.

FIG. 1 is a schematic plan view (development view) showing a box sheet according to an aspect of the present invention. FIG. 2 is a schematic perspective view showing a box body assembled by folding the box sheet of FIG. 1 along the first fold easy line and the second fold easy line. FIG. 3 is a schematic partial enlarged view of the box of FIG. 2 as viewed from the length panel side. FIG. 4 is a schematic perspective view showing a box body assembled by folding the box sheet of FIG. 1 along the third fold easy line and the fourth fold easy line. FIG. 5 is a schematic partial enlarged view of the box of FIG. 4 as viewed from the length surface panel side.

[Description of Embodiment of the Invention]
First, embodiments of the present invention will be listed and described.

  A box sheet according to an aspect of the present invention is formed of a single sheet material, alternately connected in the left-right direction, and assembled into a rectangular tube shape. A pair of first lid flaps extending from the upper edge of the length surface panel and a pair of second lid flaps extending from the upper edge of the pair of width surface panels, and can be assembled into a box shape A pair of first lid flaps having a first easy-bend line defining a boundary with the pair of long surface panels, and the pair of second lid flaps with the pair of width surface panels. A second foldable line that delimits a boundary, and the first foldable line and the second foldable line connect the first straight line portion, the connecting portion, and the second straight line portion from one side to the other in the left-right direction. Continuously in this order to the side, the second straight portion is the first Located on the upper edge side of the line portion, the length of the first linear portion of the first lid flap is not less than 1 and not more than 1.2 times the height of the second lid flap, The length of one linear portion is not less than 1 and not more than 1.2 times the height of the first lid flap.

  When the first lid flap and the second lid flap are bent along the first fold easy line and the second fold easy line at the time of assembly, the box sheet can be recessed at the first straight portion. Since the length of the 1st straight part is in the above-mentioned range, the other side of the adjacent 2nd lid flap or the 1st lid flap overlaps with this dent. Accordingly, the overlapping portion is prevented from projecting from the second linear portion of the first lid flap and the second lid flap located on the lower side thereof, so that it is constituted by the first lid flap and the second lid flap. The flatness of the upper lid is improved. For this reason, the said sheet | seat for boxes is excellent in the stability at the time of stacking the several box body assembled.

  As a level | step difference of the said 1st linear part and the said 2nd linear part, 0.8 times or more and 1.2 times or less of the thickness of the said sheet | seat material are preferable. Thus, the flatness of the upper lid at the time of assembly is further improved by setting the step in the above range.

  The connecting portion may be a straight line having an inclination with respect to the left-right direction. In this way, the first lid flap and the second lid flap can be easily bent by making the connecting portion a straight line having an inclination with respect to the left-right direction.

  The pair of first lid flaps has a third easy-to-bend line that has the same shape and parallel to the first foldable line, and the pair of second lid flaps has the same shape and parallel to the second foldable line. There are four foldable lines, the distance between the first foldable line and the third foldable line of the pair of first lid flaps, and the second foldable line of the pair of second lid flaps and the above It is preferable that the distances from the fourth fold easy line are all equal. When the box sheet has the third easy-to-fold line and the fourth easy-to-bend line having the above-described configuration, the case of folding with the first easy-to-fold line and the second easy-to-bend line, and the third easy-to-fold line and the fourth easy-to-fold line It is possible to assemble a box body having a height different from that in the case of folding along the easy folding line. Therefore, even if the size of the container such as vegetables is not constant, it can be accommodated relatively easily by changing the height of the box.

  The third fold easy line and the fourth fold easy line may be perforations formed by a plurality of cutting lines arranged at intervals. Thus, by making the 3rd fold easy line and the 4th fold easy line into perforations, the third fold easy line and the 4th fold are secured while ensuring the strength when the upper lid is constructed without bending them. In the case where the easy folding line is bent, it can be easily bent.

  In the present invention, the “left-right direction” means the horizontal direction in the assumed general usage of a box formed by assembling box sheets, and “upper” and “lower” are assumed. Although it means up and down in a general usage mode, it is not intended to limit the direction of use of the box. Further, “the height of the first lid flap” and “the height of the second lid flap” refer to the length from the second straight portion to the upper edge.

[Details of the embodiment of the present invention]
Hereinafter, a box sheet according to an embodiment of the present invention will be described with reference to the drawings as appropriate.

  As shown in FIG. 1, a box sheet according to an embodiment of the present invention is formed from a single sheet material and can be assembled into a box shape. In FIG. 1, a thick solid line indicates a cutting line obtained by cutting the sheet material, and a thin solid line indicates a ruled line formed by pushing the sheet material.

  As a sheet material for forming the box sheet, for example, a cardboard sheet can be used. The corrugated cardboard sheet may be a so-called double flute in which the core is sandwiched between three liners as well as a pair of liners sandwiched on both sides of a single core. It may be a so-called single-sided cardboard in which a liner is attached only to one side of the core.

  The lower limit of the thickness of the sheet material is preferably 3 mm from the viewpoint of strength. On the other hand, the upper limit of the thickness of the sheet material is not particularly limited, but is preferably 8 mm from the viewpoint of ease of assembly into a box.

  As shown in FIG. 1, the box sheet is alternately connected in the left-right direction (x direction in FIG. 1), and is assembled into a rectangular tube shape, a pair of long surface panels 1 and a pair of width surface panels 2, and a pair of A pair of first lid flaps 3 extending from the upper edges of the length surface panel 1, a pair of second lid flaps 4 extending from the upper edges of the pair of width surface panels 2, and a pair of length surface panels 1 A pair of first bottom flaps 5 extending from the lower edge, a pair of second bottom flaps 6 extending from the lower edge of the pair of width surface panels 2, and the length surface panel 1 disposed at one side end. And a margin part 7 extending from the side edge.

<Long and wide panels>
The length surface panel 1 and the width surface panel 2 are substantially rectangular. Moreover, a pair of length surface panel 1 is made into an equivalent magnitude | size, and a pair of width surface panel 2 is made into an equivalent magnitude | size.

  The length in the vertical direction of the long surface panel 1 (the length in the y direction in FIG. 1) and the length in the vertical direction of the width surface panel 2 are equal. Further, the length in the left-right direction of the long surface panel 1 (the length in the x direction in FIG. 1) is equal to or greater than the length in the left-right direction of the width surface panel 2.

  In addition, the vertical length of the length surface panel 1 and the width surface panel 2, the length in the left-right direction of the length surface panel 1, and the length in the left-right direction of the width surface panel 2 are box bodies assembled by the box sheet. Is appropriately determined so as to be able to correspond to the size and the number of items to be accommodated.

<First lid flap>
Each of the pair of first lid flaps 3 has a substantially rectangular shape, and has the same size.

  The height of the pair of first lid flaps 3 (the length in the extending direction and the length in the y direction in FIG. 1) is less than ½ of the width of the width surface panel 2. Thus, by making the height of the 1st lid | cover flap 3 into less than 1/2 of the width | variety of the width | variety panel 2, the box assembled with the said sheet | seat for the said boxes is a pair of 1st lid | cover as shown in FIG. It can be set as the structure which has the opening 8 between the flaps 3. FIG.

  The lower limit of the width of the opening 8 is preferably 0.2 times the width of the width panel 2 and more preferably 0.3 times. On the other hand, the upper limit of the width of the opening 8 is preferably 0.5 times the width of the width panel 2 and more preferably 0.4 times. If the width of the opening 8 is less than the above lower limit, the area of the opening 8 becomes narrow, and there is a risk of hindering the air permeability and the like for the contents. Conversely, when the width of the opening 8 exceeds the upper limit, the upper lid surface formed by the first lid flap 3 and the second lid flap 4 becomes too small, and the boxes assembled by the box sheets are stacked up and down. There is a possibility that it becomes difficult to use, and there is a possibility that the opening 8 becomes too large and the contents are dropped. The width of the opening 8 is given by (width of the width panel 2) −2 × (height of the first lid flap 3). Further, the width of the opening 8 can be adjusted by the height of the first lid flap 3 as described above.

  The pair of first lid flaps 3 includes a first fold easy line 31 that defines a boundary with the pair of long surface panels 1, and a third fold easy line 32 that has the same shape and is parallel to the first fold easy line 31. Have.

(First folding easy line)
The first fold easy line 31 may be a ruled line. In this way, the first lid flap 3 can be easily bent by using the first folding easy line 31 as a ruled line.

  As shown in FIG. 1, the first bendable line 31 includes a first straight portion 31a, a connecting portion 31b, and a second straight portion 31c continuously in this order from one side to the other in the left-right direction. The second straight part 31c is located on the upper edge side of the first lid flap 3 from the first straight part 31a.

  The first straight portion 31a extends in the left-right direction, starting from the base end of one side of the first lid flap 3 on the left-right direction.

  As a minimum of the length of the 1st straight part 31a of the 1st lid flap 3, it is 1 time of the height of the 2nd lid flap 4, and 1.05 times is more preferred. On the other hand, the upper limit of the length of the first straight part 31a is 1.2 times the height of the second lid flap 4 and is more preferably 1.1 times. When the box sheet is assembled, the first lid flap 3 is folded along the first folding easy line 31. At this time, since the second straight portion 31c is located on the upper edge side of the first lid flap 3 from the first straight portion 31a, the first straight portion 31a is located below the second straight portion 31c as shown in FIG. And dents. The other side of the second lid flap 4 adjacent to the one side overlaps the recess. For this reason, when the length of the 1st straight part 31a is less than the above-mentioned minimum, the surface of the 2nd lid flap 4 which overlaps with this 1st lid flap 3 protrudes above the 2nd straight part 31c, and the 1st lid flap 3 And the flatness of the upper cover comprised by the 2nd cover flap 4 may be insufficient. On the contrary, when the length of the first straight portion 31a exceeds the upper limit, the area of the portion that does not overlap the second lid flap 4 in the dent generated by the first straight portion 31a increases. May be insufficient.

  The connecting portion 31b connects the end point on the other side of the first straight portion 31a and the end point on the one side of the second straight portion 31c.

  The connection part 31b is good in it being a straight line which has inclination with respect to the left-right direction. Thus, the 1st lid | cover flap 3 can be made easy to bend | fold by making the connection part 31b into the straight line which has an inclination with respect to the left-right direction.

  The lower limit of the length in the left-right direction of the connecting portion 31b is preferably 5 mm, and more preferably 10 mm. On the other hand, the upper limit of the length in the left-right direction of the connecting portion 31b is preferably 30 mm, and more preferably 20 mm. If the length of the connecting portion 31b in the left-right direction is less than the lower limit, the effect of facilitating the bending of the first lid flap 3 due to the inclination of the connecting portion 31b may be insufficient. Conversely, if the length of the connecting portion 31b in the left-right direction exceeds the upper limit, the connecting portion 31b is a portion that is not parallel to the second straight line portion 31c, so that the area increases and the flatness of the upper lid is increased. There may be a shortage.

  The second straight portion 31 c is a straight line connecting the other end of the connecting portion 31 b and the other end of the first lid flap 3. The second straight part 31c is parallel to the first straight part 31a and is located on the upper edge side of the first lid flap 3 from the first straight part 31a as described above. That is, there is a step between the first straight part 31a and the second straight part 31c.

  As a minimum of a level difference of the 1st straight part 31a and the 2nd straight part 31c, 0.8 times are preferred and 0.9 times are more preferred. On the other hand, the upper limit of the step is preferably 1.2 times, more preferably 1.1 times. If the level difference is less than the lower limit, the surface of the second lid flap 4 that overlaps the first lid flap 3 may protrude above the second linear portion 31c, and the flatness of the upper lid may be insufficient. On the contrary, if the level difference exceeds the upper limit, the second linear portion 31c is positioned above the surface of the second lid flap 4 that overlaps the first lid flap 3, and the flatness of the upper lid is insufficient. There is a fear.

(3rd easy-to-bend line)
The third easy-to-bend line 32 can be a ruled line, but is preferably a perforation formed by a plurality of cutting lines arranged at intervals. By making the third fold easy line 32 as a perforation in this way, the third fold easy line 32 is bent when the third fold easy line 32 is bent while securing the strength when the upper lid is formed without being bent. Can be made easier. When the first fold easy line 31 is a ruled line and the third fold easy line 32 is a perforation, the cut lines are connected by a ruled line, but the ruled line of the third fold easy line 32 is the first fold easy line 31. It is preferable that the depth of the line push is shallower than the ruled line. Thus, the strength of the upper lid can be easily secured by reducing the depth of the muscle push.

  The third fold easy line 32 has the same shape as the first fold easy line 31 as described above. That is, as shown in FIG. 1, the third easy-to-bend line 32 includes a first straight portion 32a, a connection portion 32b, and a second straight portion 32c continuously from one side to the other side in this order. . The second straight portion 32c is located on the upper edge side of the first lid flap 3 with respect to the first straight portion 32a.

  Further, the third easy-to-bend line 32 is in parallel with the first easy-to-bend line 31 as described above. That is, the connection part 32b of the third fold easy line 32 and the connection part 31b of the first fold easy line 31 are arranged in the vertical direction.

  Although the space | interval of the 1st bendable line 31 and the 3rd bendable line 32 is suitably determined according to a contained thing, as a minimum of the said space | interval, 10 mm is preferable and 20 mm is more preferable. On the other hand, the upper limit of the interval is preferably 50 mm, and more preferably 40 mm. If the distance is less than the lower limit, the amount by which the height of the assembled box can be changed is small, and the effect of providing two easy folding lines may be insufficient. On the other hand, when the distance exceeds the upper limit, the upper lid surface formed by the first lid flap 3 and the second lid flap 4 becomes too small when used by being folded at the third folding easy line 32, and for the box. There is a possibility that it is difficult to use the boxes assembled by the sheets in an up-and-down manner, and there is a possibility that the opening 8 becomes too large and the contents are dropped.

  The distance between the first fold easy line 31 and the third fold easy line 32 of the pair of first lid flaps 3, and the second fold easy line 41 and the fourth fold easy line 42 of the pair of second lid flaps 4, The intervals are all equal. When the box sheet has the third easy-to-fold line 32 and the fourth easy-to-bend line 42 having the above-described configuration, the case can be folded at the first easy-to-fold line 31 and the second easy-to-fold line 41, and the third easy to bend. Box bodies having different heights can be assembled with the line 32 and the fourth easy-to-bend line 42. Therefore, even if the size of the container such as vegetables is not constant, it can be accommodated relatively easily by changing the height of the box.

<Second lid flap>
Each of the pair of second lid flaps 4 has a substantially rectangular shape, and has the same size.

  The height of the pair of second lid flaps 4 (the length in the extending direction and the length in the y direction in FIG. 1) is not particularly limited, but from the viewpoint of the efficiency of use of the sheet material, the height of the first lid flap 3 It is preferable to make it equal to the height.

  The pair of second lid flaps 4 includes a second easy-to-bend line 41 that defines a boundary with the pair of width surface panels 2, and a fourth easy-to-bend line 42 that has the same shape and is parallel to the second easy-to-bend line 41.

  As shown in FIG. 1, the second easy-to-bend line 41 includes a first straight portion 41a, a connecting portion 41b, and a second straight portion 41c continuously in this order from one side to the other in the left-right direction. The second straight portion 41c is located on the upper edge side of the second lid flap 4 from the first straight portion 41a.

  The second fold easy line 41 can be configured in the same manner as the first fold easy line 31 of the first lid flap 3.

  The fourth fold easy line 42 has the same shape as the second fold easy line 41 as described above. That is, as shown in FIG. 1, the fourth easy-to-bend line 42 includes a first straight portion 42a, a connecting portion 42b, and a second straight portion 42c continuously in this order from one side to the other side in the left-right direction. . The second straight part 42c is located on the upper edge side of the second lid flap 4 from the first straight part 42a.

  Further, the fourth fold easy line 42 is in parallel with the second fold easy line 41 as described above. That is, the connection part 42b of the fourth fold easy line 42 and the connection part 41b of the second fold easy line 41 are arranged in the vertical direction.

  The distance between the second easy fold line 41 and the fourth easy fold line 42 can be the same as the distance between the first easy fold line 31 and the third easy fold line 32.

(Notch)
As shown in FIG. 1, the pair of first lid flaps 3 and the pair of second lid flaps 4 may have notches 9 extending from the upper edge in the proximal direction at the one end.

  In the box sheet, when the upper lid is assembled, one side of the first lid flap 3 and the second lid flap 4 is positioned below the adjacent second lid flap 4 and the first lid flap 3, and the other side is adjacent to the other. The second lid flap 4 and the first lid flap 3 are assembled so as to be positioned on the upper side. Since the pair of first lid flaps 3 and the pair of second lid flaps 4 have such notches 9, the upper lid can be easily assembled.

  The notch 9 can be trapezoidal or triangular as shown in FIG. In particular, as shown in FIG. 1, at least one notch 9 may be triangular. When assembling the upper lid as described above, the first self-other flap 3 and the second lid flap 4 are alternately assembled while the other end of the lid flap adjacent to the upper side of the one end is overlapped. However, when the fourth lid flap is overlapped with the first lid flap as a starting point, the first lid flap is already bent. For this reason, it is necessary to let one end of the fourth lid flap to enter below the other end of the first lid flap. If the notch 9 has a triangular shape, this operation can be easily performed.

  On the other hand, when the notch 9 is too large, the overlapping area between the adjacent lid flaps when the upper lid is assembled becomes small, and the lid flaps cannot be sufficiently prevented from opening. For this reason, it is preferable that the notch 9 has a relatively small area. From this viewpoint, the notch 9 is preferably trapezoidal. From the above, as the four notches 9, as shown in FIG. 1, it is more preferable that three are trapezoidal and one is triangular.

  In the box sheet, the base end side from the third fold easy line 32 of the first lid flap 3 and the base end side from the fourth fold easy line 42 of the second lid flap 4 are not related to the shape. As shown in FIG. 1, the width of the notch 9 is preferably reduced toward the end side. The box sheet can be folded at the third fold easy line 32 and the fourth fold easy line 42 to form a box having a large box height as shown in FIG. In this case, for example, as shown in FIG. 5, the lid flap between the first fold easy line 31 and the third fold easy line 32 constitutes the side surface of the box, and therefore the first fold of the notch 9. A portion located between the easy line 31 and the third easy-to-bend line 32 creates a hole in the side surface. Therefore, by reducing the width of the notch 9 in this portion as described above, the area of the hole can be reduced, and the contents can be prevented from jumping out or falling from the hole.

<First bottom flap and second bottom flap>
A pair of 1st bottom flap 5 and a pair of 2nd bottom flap 6 are comprised so that the bottom part of the box body assembled can be obstruct | occluded.

  Specifically, the first bottom flap 5 is configured to be able to abut the tip edges of the pair of first bottom flaps 5, and the height of the first bottom flap 5 (the length in the extending direction is shown in FIG. 1). The length in the y direction is, for example, ½ of the width of the width panel 2. Thereby, the bottom part of the said box can be obstruct | occluded.

  On the other hand, the height of the second bottom flap 6 is not particularly limited, but can be equal to the height of the first bottom flap 5.

  The widths of the first bottom flap 5 and the second bottom flap 6 (the length in the x direction in FIG. 1) are not particularly limited, but are equivalent to the widths of the length surface panel 1 and the width surface panel 2 that extend. It is preferable to do.

  The pair of first bottom flaps 5 and the pair of second bottom flaps 6 are bent at right angles to the length surface panel 1 and the width surface panel 2 that extend, respectively, during assembly, and the second bottom flap 6 becomes the inside. To form the bottom of the box.

<Adhesive part>
The glue margin 7 is provided at one side end of a belt-like body formed by connecting a pair of long surface panels 1 and a pair of width surface panels 2. The margin portion 7 is configured to be able to contact the other side end of the band-like body. By sticking this abutting portion to the other side end of the strip, the pair of long surface panels 1 and the pair of width surface panels 2 can be made endless. Or you may couple | bond by wire joining etc. instead of sticking.

<Box assembly method>
A box body assembling method for assembling the box sheet into a box body includes a quadrangular cylindrical portion assembly step, a bottom portion assembly step, and a lid portion assembly step.

(Square tubular part assembly process)
In the rectangular cylindrical part assembly step, the pair of long surface panels 1 and the pair of width surface panels 2 that are alternately connected in the left-right direction are assembled into a rectangular tube shape.

  Specifically, the following procedure is followed. First, of the pair of long surface panels 1 and the pair of width surface panels 2 that are alternately connected in the left-right direction, the length surface panel 1 positioned at one side end is folded to the inner surface side of the adjacent width surface panel 2. The width surface panel 2 positioned on the other side end is folded and folded on the inner surface side of the adjacent length surface panel 1. Then, the margin portion 7 is attached to the inner surface of the other side of the width panel 2 in the left-right direction (the side opposite to the side connected to the length panel 1). Thereby, a pair of length surface panel 1 and a pair of width surface panel 2 are connected endlessly. The box sheet is provided to the user (the user of the box) in this state. The pasting portion 7 can be attached to the width panel 2 using, for example, an adhesive or a stapler.

  Next, the pair of long surface panels 1 and the pair of width surface panels 2 connected endlessly are spread in a rectangular tube shape.

(Bottom assembly process)
In the bottom assembly step, the bottom of the box is assembled by the pair of first bottom flaps 5 and the pair of second bottom flaps 6.

  Specifically, the following procedure is followed. First, the pair of second bottom flaps 6 are bent so as to be perpendicular to the width panel 2. Next, the pair of first bottom flaps 5 are bent so as to be perpendicular to the length surface panel 1 so as to contact the outer surface. Since a pair of 1st bottom flaps 5 are comprised so that front-end edges can be faced | matched, a bottom part is sealed by sticking a sealing tape, for example to this abutting part.

(Lid assembly process)
In the lid assembly process, the lid of the box is assembled by the pair of first lid flaps 3 and the pair of second lid flaps 4. In the box sheet, the height of the box body can be selected from a reference height and a large height by selecting an easy folding line to be bent at the time of assembling the lid.

  When assembling the box having the reference height, the first lid flap 3 and the second lid flap 4 are bent along the first folding easy line 31 and the second folding easy line 41, respectively.

  In the case of the box sheet shown in FIG. 1, first, the first lid flap 3 extending from the length surface panel 1 in which the glue margin 7 is provided at the side end is lengthened by the first bendable line 31. Bend to be perpendicular to the face panel 1.

  Next, the second lid flap 4 extending from the width panel 2 attached to the adhesive margin 7 is bent at a second bendable line 41 so as to be perpendicular to the width panel 2. As a result, the other end of the second lid flap 4 overlaps with the end of the first lid flap 3 that has been folded first, that is, the surface of the portion that is bent at the first straight portion 31a.

  Further, the first lid flap 3 adjacent to one side of the second lid flap 4 is similarly folded along the first folding easy line 31 and the other end of the first lid flap 3 is folded first. It overlaps with the surface of the edge part of the one side of 2 lid | cover flaps 4. FIG.

  Finally, the notch 9 has a triangular shape, and the second lid flap 4 that has not been bent is bent at a second folding easy line 41 so as to be perpendicular to the width panel 2. At this time, the other end portion of the second lid flap 4 thereby overlaps the end portion of the first lid flap 3 bent immediately before, that is, the surface of the portion bent by the first linear portion 31a. . On the other hand, as it is, the one end portion of the second lid flap 4 overlaps the surface of the other end portion of the first lid flap 3 that is bent first. The end portion is made to enter below the other end portion of the first lid flap 3 that is bent first. Since the notch 9 of the second lid flap 4 has a triangular shape, it is easy to sink under the other end of the first lid flap 3. Accordingly, the lid flaps may be folded in such an order that the lid flap having the triangular notch 9 is folded last.

  When assembling a box having a large height, the first lid flap 3 and the second lid flap 4 are bent along the third folding easy line 32 and the fourth folding easy line 42, respectively. The folding procedure is the same as that for assembling the box having the reference height, except that the folding easy lines to be folded are different, and detailed description thereof will be omitted.

<Advantages>
When the first lid flap 3 and the second lid flap 4 are bent along the first fold easy line 31 and the second fold easy line 41 at the time of assembly, the box sheet can be recessed at the first straight portions 31a and 41a. Since the lengths of the first straight portions 31a and 41a are within the above range, the other side of the adjacent second lid flap 4 or first lid flap 3 overlaps with this recess. Accordingly, the overlapping portion is prevented from projecting from the second linear portions 31c and 41c of the first lid flap 3 and the second lid flap 4 located below the first lid flap 3 and the first lid flap 3 and the second lid flap 3. The flatness of the upper lid constituted by the two lid flaps 4 is improved. For this reason, the said sheet | seat for boxes is excellent in the stability at the time of stacking the several box body assembled.

  In addition, the box sheet has the third fold easy line 32 and the fourth fold easy line 42, so that the box sheet is bent by the first fold easy line 31 and the second fold easy line 41, and the third fold easy line 32 and It is possible to assemble a box having a different height from the case where the fourth folding easy line 42 is used for bending. Therefore, even if the size of the container such as vegetables is not constant, it can be accommodated relatively easily by changing the height of the box.

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

  In the above embodiment, the case where the box sheet has the third fold easy line and the fourth fold easy line has been described. However, the third fold easy line and the fourth fold easy line are not essential components and are omitted. It is possible. A box sheet whose height cannot be changed is also intended by the present invention.

  In the said embodiment, although the sheet | seat for boxes has the glue margin part and the structure which assembles a box body by sticking to this glue margin part was demonstrated, the method of assembling a box body is not limited to this. For example, it can be configured by sticking a sealing tape. In this case, the margin part can be made unnecessary.

  Moreover, the specific structure for forming the bottom part of a box is not limited to the structure of the said embodiment. For example, the bottom portion of the box sheet may be formed by one bottom flap extending from the lower edge of one of the long surface panels.

  As described above, the box sheet of the present invention can be assembled into a box body that is excellent in stability when a plurality of sheets are stacked and used.

DESCRIPTION OF SYMBOLS 1 Length surface panel 2 Width surface panel 3 1st lid | cover flap 31 1st bendable line 31a 1st straight line part 31b Connection part 31c 2nd straight line part 32 3rd bendable line 32a 1st straight line part 32b Connection part 32c 2nd straight line Part 4 Second lid flap 41 Second fold easy line 41a First straight part 41b Connection part 41c Second straight part 42 Fourth fold easy line 42a First straight part 42b Connection part 42c Second straight part 5 First bottom flap 6 2nd bottom flap 7 Paste margin 8 Opening 9 Notch

Claims (5)

Formed from one sheet material,
A pair of long surface panels and a pair of width surface panels that are alternately connected in the left-right direction and assembled into a square cylinder;
A pair of first lid flaps extending from the upper edges of the pair of long face panels;
A pair of second lid flaps extending from the upper edges of the pair of width surface panels, and a box sheet that can be assembled into a box shape,
The pair of first lid flaps has a first easy-bend line defining a boundary with the pair of long face panels;
The pair of second lid flaps has a second foldable line defining a boundary with the pair of width panel;
The first easy-to-bend line and the second easy-to-bend line are provided with a first straight part, a connecting part, and a second straight part continuously in this order from one side to the other in the left-right direction,
The second straight portion is positioned on the upper edge side of the first straight portion,
The length of the first straight portion of the first lid flap is not less than 1 times and not more than 1.2 times the height of the second lid flap;
A box sheet in which the length of the first straight portion of the second lid flap is 1 to 1.2 times the height of the first lid flap.   The box sheet according to claim 1, wherein a step between the first straight portion and the second straight portion is not less than 0.8 times and not more than 1.2 times the thickness of the sheet material.   The box seat according to claim 1 or 2, wherein the connecting portion is a straight line having an inclination with respect to the left-right direction. The pair of first lid flaps has a third easy-to-bend line that is in the same shape and parallel to the first easy-to-bend line,
The pair of second lid flaps has a fourth easy-to-bend line that is in the same shape and parallel to the second easy-to-bend line,
The distance between the first fold easy line and the third easy fold line of the pair of first lid flaps, and the distance between the second easy fold line and the fourth easy fold line of the pair of second lid flaps. The box sheet according to claim 1, claim 2, or claim 3, wherein all are equal.   The box sheet according to claim 4, wherein the third fold easy line and the fourth fold easy line are perforations formed by a plurality of cutting lines arranged at intervals.

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