JP6268321B1 - Box sheet - Google Patents

Abstract

The present invention provides a box sheet that is assembled into a box that can form a tray having a small height by dividing the box without generating small pieces of sheet material. A box sheet according to the present invention is a box sheet formed of a single sheet material and assembled into a box shape, and has a rectangular shape connected in the left-right direction so as to be assembled into a rectangular tube shape. Easily breakable line 14 having four side panels 1, 2, 3, 4 and formed to cross the four side panels, and inclined from the upper corner of the four side panels to the easy break line It has four pairs of easy folding lines 15 formed so as to extend. [Selection] Figure 1

Description

  The present invention relates to a box sheet.

  In order to transport commodities, for example, a box formed of cardboard sheet material is widely used. Some boxes for shipping goods are opened so that each side panel is divided into upper and lower parts so that the lower part of the box can be used as a tray for displaying goods.

  In many cases, the box that can be used as a tray after opening as described above has a tear band defined by a pair of easy-to-break lines over the entire peripheral wall formed by a plurality of side panels. However, when the box is divided into upper and lower parts by such a tear band, the tear band becomes a small garbage. For this reason, when opening a plurality of boxes, the upper part of the box can be handled by being stacked in an unfolded state or a folded state, but the tear band is collected separately in, for example, a trash bag. Need to be processed.

  On the other hand, for example, in Japanese Patent Application Laid-Open No. 2004-344236, a convex easy break line is formed between upper corners on both sides of a box, and the easy break line is broken. A configuration is described in which the upper portion of each side panel is flipped up with the upper edge of each side panel as the center, so that a small piece of sheet material can be opened in a tray shape.

  However, in the configuration described in the above publication, since the easy break line needs to be formed with the upper corners of the side panel as both ends so that each side panel can be broken independently, the corner of the tray to be formed Is the same height as the original box. For this reason, in the structure described in the above publication, when used as a tray, the product may be difficult to see or may be inferior in aesthetic appearance.

JP 2004-344236 A

  In view of the above inconveniences, an object of the present invention is to provide a sheet for a box that is assembled into a box that can form a tray having a small height by dividing the box without generating a small piece of sheet material. .

  A box sheet made to solve the above-mentioned problems is a box sheet formed from a single sheet material and assembled into a box shape, and is a rectangular shape connected in the left-right direction so as to be assembled into a rectangular tube shape And four pairs formed so as to extend from the upper corners of the four side panels to the easy break line. It is characterized by having an easy-to-bend line.

  Since the box sheet has the easy break line, each side panel can be moved up and down by rotating the upper part of the easy break line around the upper edge of the side panel in the assembled state. It can be opened and opened so that the lower part of the box body is left in a tray shape having a smaller height than the box body. Here, since there are four pairs of easy-to-bend lines that incline from the four upper corners and extend to the easy-to-break line, the upper part of the side panel becomes a peak with the easy-to-bend line as the upper part of the side panel rotates As a result of the folding, the lower region of the easy-to-bend line on the upper part of the side panel is drawn inside the box, and further rotation of the upper part of the side panel and the easy-to-break line near the boundary of the side panel. Promotes cutting. For this reason, a box formed by assembling the box sheet can be opened so as to form a tray without generating small pieces of sheet material by dividing the four side panels individually by an easy-to-break line. .

  It is preferable that the inclination angle of the easy bending line with respect to the vertical direction is 30 ° or more and 60 ° or less. Thus, when the inclination angle with respect to the vertical direction of the easy-to-bend line is within the above range, the sheet material is efficiently bent along the easy-to-bend line by the force that rotates the upper part of the side panel outward. be able to. Thereby, since the box formed by assembling the box sheet can draw the boundary of the adjacent side panel into the inside of the box and easily break the easy break line in the region near the boundary of the side panel, The box can be easily opened.

  Each of the side panels extends linearly in the left-right direction in a first region straddling the boundary between adjacent side panels in an assembled state among the regions divided by the intersections with the easy-to-bend lines. Preferably, each of the second regions crossing the central portion in the left-right direction is formed to be convex downward. In this way, the easy-to-break line extends linearly in the left-right direction in the first region, so that the tray formed after opening the box formed by assembling the box sheet suppresses the height of the corners. In addition, it is excellent in aesthetics because the upper corners are flat. In addition, the easy break line is formed to protrude downward in the second region, so that the lower end of the upper side portion of the side panel is pulled outward so that the breakage proceeds from the center in the left-right direction to both sides. Therefore, the box formed by assembling the box sheet is easy to open.

  It is preferable that the vertical distance from the upper edge of the side panel to the lower end of the foldable line is 15% or more and 50% or less of the average length of the side panel in the vertical direction. Since the vertical distance from the upper edge of the side panel to the lower end of the foldable line is within the above range, the height of the corner of the tray formed after opening the box formed by assembling the box sheet. Since the length of the first region of the easy-to-break line is relatively small, opening is easy.

  It is preferable that the easy break line is formed so as to be bent so as to define a tongue-like break starting piece at the center in the left-right direction of each side panel. In this way, the easy break line defines a tongue-shaped break start portion at the center in the left-right direction of each side panel, so that the four side walls extend from the break start piece along the break easy line. It can be easily divided.

  As described above, the box sheet of the present invention is assembled into a box body that can divide the box body to form a tray having a small height without generating small pieces of sheet material.

It is a typical top view (development drawing) which shows the sheet for boxes of one embodiment of the present invention. It is a typical perspective view which shows the box formed by assembling the sheet | seat for boxes of FIG. It is a typical perspective view which shows the tray formed by opening the box of FIG. It is a typical perspective view which shows 1 process of opening of the box of FIG. It is a typical perspective view which shows the process following FIG. 4 of opening of the box 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 material and can be assembled into a box shape as shown in FIG. Further, by opening the box formed by assembling the box sheet, a tray that can be used for displaying commodities as shown in FIG. 3 can be formed. In FIG. 1, the thick solid line indicates an edge formed by cutting the sheet material, and the thin solid line pushes the back surface of the sheet material (the surface on the inner side of the box in the assembled state). The ruled line to be formed is shown.

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

  The corrugated cardboard sheet may be a so-called double flute in which a core is sandwiched between three liners, as well as a pair of liners sandwiched on both sides of a core. It may be a so-called single-sided cardboard in which a liner is stuck only on one side.

  Each of the box sheets is formed in a square shape and is connected to four side panels (first long side panel 1, first short side panel 2, second long side) connected in the left-right direction so as to be assembled into a square cylinder. The side surface panel 3 and the second short side surface panel 4) are extended from the side edge of the first long side surface panel 1 opposite to the first short side surface panel 2, and are attached to the second short side surface panel 4. A joint 5 is provided for connecting the four side panels in an endless loop shape by being worn.

  In the present specification, the “left-right direction” is a direction corresponding to the horizontal direction in a general usage mode assumed for a box formed by assembling the box sheet, and “up” and “down”. Means up and down in the assumed general use mode, but restricting the orientation of the sheet material during the production of the box sheet and the orientation of the box formed by assembling the box sheet Not intended.

  The box sheet includes a pair of outer lid flaps (first outer lid flap 6 and second outer lid flap 7) extending from the upper edges of the first long side surface panel 1 and the second long side surface panel 3. And a pair of lid flaps (first lid flap 8 and second lid flap 9) extending from the upper edges of the first short side panel 2 and the second short side panel 4. The joint 5 protrudes upward from the first long side surface panel 1 so as to be attached also to the back side near the side edge of the second lid flap 9 opposite to the second lid outer flap 7. ing.

  Further, the box sheet includes a pair of bottom outer flaps extending from the lower edges of the first long side surface panel 1 and the second long side surface panel 3 (first bottom outer flap 10 and second bottom outer flap 11). And a pair of bottom inner flaps (first bottom inner flap 12 and second bottom inner flap 13) extending from the lower edges of the first short side panel 2 and the second short side panel 4.

  The box sheet is usually folded between the first long side surface panel 1 and the first short side surface panel 2 and between the second long side surface panel 3 and the second short side surface panel 4 to obtain the first long side surface panel. The panel 1 is brought into close contact with the back surface of the first short side surface panel 2, and the second short side surface panel 4 is brought into close contact with the back surface of the second long side surface panel 3. Supplied to the user in a folded state with the The seam 5 can be attached to the second short side panel 4 using, for example, an adhesive or a stapler.

  In the box formed by assembling the box sheet, the upper ends of the rectangular cylindrical portions formed from the four side panels 1, 2, 3, and 4 are folded inward by the pair of lid flaps 8 and 9, and the pair. The pair of outer flaps 6, 7 are folded on the outer surfaces of the inner lid flaps 8, 9 and sealed by bringing the end edges of the pair of outer lid flaps 6, 7 together. Similarly, the lower end of the rectangular cylindrical portion formed by the four side panels 1, 2, 3, 4 is bent inwardly with the pair of bottom flaps 12, 13 and the outer surfaces of the pair of bottom flaps 12, 13 The pair of outer bottom flaps 10, 11 are folded together and sealed by bringing the end edges of the pair of outer bottom flaps 10, 11 together.

  Although the box formed by assembling the box sheet is not shown in the drawing, the adhesive tape is formed along the joints of the front edge of the pair of outer flaps 6 and 7 and the joint of the front edge of the pair of bottom outer flaps 10 and 11. A pair of flaps 8 and 9 and a pair of flaps 6 and 7, and a pair of bottom flaps 12 and 13 and a pair of bottom flaps 10 and 11 with an adhesive. This keeps the sealed state.

  The box sheet is inclined from the easy-to-open break line 14 formed so as to cross the entire four side panels 1, 2, 3, 4 and the upper corners of the four side panels 1, 2, 3, 4. And four pairs of easy-to-open folding lines 15 formed so as to extend to the easy-to-open breaking line 14. In addition, although the unsealing break easy line 14 and the unfolding easy bending line 15 are formed also in the joint margin 5, these are the unbreakable easy breaking line 14 and the unfolding easy bending formed in the 2nd short side surface panel 4. It overlaps with the line 15 and functions substantially integrally.

  The box sheet has an insertion piece forming portion 16 formed at the center of the base end portion of the outer flaps 10, 11 and an opening forming portion 17 formed at the center of the base end portion of the outer flaps 6, 7. .

<Unbreakable break line>
The easy-to-open break line 14 is formed as a cut line formed intermittently, a so-called perforation. The average length of the cutting line can be, for example, 2 mm or more and 8 mm or less. In addition, the cutting rate of the easy-to-open breakable line 14 (ratio of the total length of the cut lines with respect to the total length of the easy-to-open breakable line 14) can be, for example, 40% to 60%. In addition, the length and cutting rate of the cutting line in the easy-to-open breakable line 14 may be different for each part.

  The easy-to-break breakable line 14 includes a first region 18 that straddles the boundary between adjacent side panels in an assembled state at the intersection with the easy-to-open bend line 15, and the center in the left-right direction of the side panels 1, 2, 3, and 4. Each is divided into a second region 19 that traverses.

(First area)
In the first region 18, the easy-to-open break lines 14 are preferably formed so as to extend linearly in the left-right direction. Thereby, the tray formed after opening the box formed by assembling the box sheet can suppress the height of the corner portion and is excellent in aesthetics because the upper end of the corner portion becomes flat.

  As a minimum of the length of each 1st field 18, 30% of average height of side panels 1, 2, 3, and 4 is preferred, and 40% is more preferred. On the other hand, the upper limit of the length of each first region 18 is preferably 80% of the average height of the side panels 1, 2, 3, 4 and more preferably 70%. When the length of each 1st field 18 is less than the above-mentioned minimum, there is a possibility that the height of the corner of the tray formed from the box sheet cannot be made small enough. On the other hand, when the length of each first region 18 exceeds the above upper limit, it may be difficult to open the box formed by assembling the box sheet.

  The easy-to-open breakable line 14 is preferably formed locally at both ends of each first region 18 so that the cutting line is relatively long and the cutting rate is large. Thereby, it becomes more certain that the break of the easy-to-break breakable line 14 proceeds continuously from the second region 19 to the first region 18.

  Further, the easy-to-break break line 14 is preferably formed so that a cutting line is not disposed on the boundary line of the side panels 1, 2, 3, 4 and in the vicinity of the boundary line of the side panels 1, 2, 3, 4 It is more preferable that the cutting rate is locally small. Thereby, the box which assembles the box sheet can be prevented from opening unintentionally.

(Second area)
In the second region 19, the easy-to-open breakable lines 14 are preferably formed in a convex shape on the lower side. Accordingly, the upper portion of the side panel 1, 2, 3, 4 is pulled outward while holding its lower end, so that the second panel is rotated about the upper edge of the side panel 1, 2, 3, 4 Since it becomes easy to advance the break of the easy-to-open break line 14 from the center of the region 19 toward both outer sides, it is easy to open the box formed by assembling the box sheet.

  In addition, the easy-to-break breakable line 14 is a tongue-shaped break start piece 20 that protrudes downward from the center of the second region 19 in the left-right direction, that is, the center of each side panel 1, 2, 3, 4 in the left-right direction. It is preferable to bend so as to define. The breaking start piece 20 defined by the center portion of the easy-to-open breakable line 14 is folded into the inside of the box in an assembled state, thereby forming an opening into which a hand can be inserted.

  It is preferable that the portion that defines the break start piece 20 of the easy-to-open break line 14 has a high cutting rate. Moreover, it is preferable that the base sheet ruled line 21 which demarcates the base end edge of the fracture | rupture start piece 20 is formed in the said sheet | seat for boxes.

<Opened folding easy line>
The easy-to-open folding line 15 extends from the upper corners of the side panels 1, 2, 3 and 4. This “upper corner” is strictly at the corners of the side panels 1, 2, 3, and 4. The sheet may be formed by setting the point where the distance from the corner is 3 times or less, preferably 2 times or less the average thickness of the sheet material forming the box sheet, as the starting point of the easy-to-open folding line 15. It shows the same behavior as when the unfolded folding easy line 15 is strictly extended from the corner by deformation of the material. The lower end (end point) of the easy-to-open folding line 15 may also be slightly separated from the easy-to-open break line 14 as in the above-described tolerance of the upper end position.

  The box formed by assembling the box sheet is formed by folding the sheet material along the easy-to-open folding line 15 so as to be above the easy-to-open breaking line 14 of each side panel 1, 2, 3, 4. It becomes possible to rotate the portion around the upper edge of the side panels 1, 2, 3, and 4. That is, the box formed by assembling the box sheet has the easy-to-open folding line 15 so that the easy-to-open breakable line 14 can be obtained by rotating the upper part of each side panel 1, 2, 3, 4. It can be easily broken and split up and down.

  As a minimum of the angle of inclination to the up-and-down direction of unfolded folding easy line 15, 30 degrees is preferred and 40 degrees is more preferred. On the other hand, as an upper limit of the inclination angle with respect to the up-down direction of the easy-to-open folding line 15, 60 ° is preferable, and 50 ° is more preferable. When the angle of inclination of the easy-to-open folding line 15 with respect to the vertical direction is less than the above lower limit, the easy-to-open breaking line is reduced by reducing the pivotable angle about the upper edge of each side panel 1, 2, 3, 4 There is a possibility that 14 cannot be reliably broken. On the contrary, when the angle of inclination of the easy-to-open folding line 15 with respect to the vertical direction exceeds the upper limit, a force acts in a direction different from the breaking direction of the first region 18 of the easy-to-open breaking line 14 and the side panels 1, 2 , 3 and 4 may not be broken along the easy-to-break break line 14.

  The lower limit of the vertical distance from the upper edge of the side panels 1, 2, 3, 4 to the lower end of the easy-to-open folding bend line 15 is 15% of the average vertical length of the side panels 1, 2, 3, 4 Is preferable, and 20% is more preferable. On the other hand, the upper limit of the vertical distance from the upper edge of the side panels 1, 2, 3, 4 to the lower end of the easy-to-open folding line 15 is the average length of the side panels 1, 2, 3, 4 in the vertical direction. 50% is preferable and 40% is more preferable. When the vertical distance from the upper edge of the side panel 1, 2, 3, 4 to the lower end of the easy-to-open folding line is less than the lower limit, the length of the first region 18 of the easy-to-open breaking line 14 is reduced. Therefore, there is a risk that the corner of the tray formed from the box sheet projects sharply and the aesthetic appearance is impaired. When the distance in the vertical direction from the upper edge of the side panel 1, 2, 3, 4 to the lower end of the easy-to-open folding line exceeds the above upper limit, the length of the first region 18 of the easy-to-open breaking line 14 needs to be increased. Therefore, there is a possibility that the breakage of the easy-to-open breakable line 14 becomes uncertain.

  In the box formed by assembling the box sheet, first, the breaking start piece 20 is pushed into the box to form an opening, and a hand is put into the opening to grip the sheet material above the opening to The upper portions of the side panels 1, 2, 3 and 4 are rotated around the upper edges of the side panels 1, 2, 3 and 4 so as to be pulled. Thereby, the unsealing break easy line 14 is broken, and the side panels 1, 2, 3 and 4 are divided into upper and lower parts, respectively, so that the tray shown in FIG. 3 can be formed.

  In the box formed by assembling the box sheet, the side panels 1, 2, 3, and 4 can be divided vertically along the easy-to-break line 14 as shown in FIG. In addition, breaking the opening break easy line 14 of the short side panels 2 and 4 having a small distance between the break starting piece 20 and the first area 18 first of the first area 18 of the opening easy break line 14 It is preferable because breakage is easier and more reliable.

  If the opening break easy line 14 of the short side panels 2 and 4 is first broken, the upper portions of both side edges of the short side panels 2 and 4 are drawn into the inside of the box. The first region 18 of the unsealing break easy line 14 is also broken. For this reason, next, as shown in FIG. 5, the unbreakable easy break line 14 of the long side surface panels 1 and 3 having a large distance between the breakage starting piece 20 and the first region 18 is broken more reliably. The entire circumference of the easy-to-open breaking line 14 can be broken.

  Moreover, as shown in FIG.4 and FIG.5, the force which fractures | ruptures a sheet | seat material is symmetrical by breaking simultaneously the opening break easy line 14 of the short side surface panels 2 and 4 or the long side surface panels 1 and 3 which oppose. Since the force does not escape due to the movement of the box, the opening of the box becomes easy.

<Insertion piece forming part>
The insertion piece forming portion 16 is formed in a convex shape on the distal end side in the extending direction with the lower edges of the long side surface panels 1 and 3 at both ends at the central base end portion in the left-right direction of the outer bottom flaps 10 and 11. It is formed by an easy line, and along the easy break line, a part of the bottom bottom flaps 10, 11 is separated to form an insertion piece, which can be protruded below the box.

  The easy break line that defines the insertion piece forming portion 16 preferably has a greater cutting rate than the easy open break line 14.

  Moreover, it is preferable that the insertion piece formation part 16 has a tongue-like part which can be pushed in the inner side of a box similarly to the fracture | rupture start piece 20 of the side panels 1, 2, 3, 4 in the center part. . This facilitates the work of separating the insertion pieces from the bottom outer flaps 10 and 11 and projecting them below the box.

<Opening part>
The opening forming portion 17 includes a pair of notches or breakable lines extending from the upper edge of the long side panels 1 and 3 to the distal end side in the extending direction of the outer flaps 6 and 7, and a base of the pair of notches or breakable lines. Formed on the outer flaps 6 and 7 so as to connect the breakable lines formed on the upper edges of the long side panels 1 and 3 and the ends of the pair of cuts or breakable lines to connect the ends. And ruled lines. The length of the opening forming portion 17 in the left-right direction is substantially equal to the length of the insertion piece forming portion 16 in the left-right direction.

  The opening forming part 17 can separate the vicinity of the base edge at the center in the left-right direction of the outer lid flaps 6 and 7 into a tongue-like shape and push it into the inside of the box to form an opening. An insertion piece formed by the above-described insertion piece forming portion 16 of a box formed by assembling another box sheet is inserted into the opening formed by the opening forming portion 17. Thereby, it is possible to prevent the collapse of the load when a plurality of boxes are stacked.

[Other Embodiments]
The said embodiment does not limit the structure of this 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 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 box sheet, the break start portion of the easy-to-open break line may be different from the above-described embodiment. For example, a convex rupture start piece may be formed on the top, and a configuration may be provided in which an opening for inserting a hand is formed independently of the easy opening break line.

  The easy-to-open break line of the box sheet may be formed in a wavy shape in the second region.

  In the box sheet, the joint may be formed so as not to hinder the breaking and folding of the opening break easy line 14 and the open folding easy line 15 of the second short side panel. For example, the easy opening break line 14 and the unfolded folding easy line 15 may be cut out.

  In the box sheet, the insertion piece forming portion and the opening forming portion are not essential.

  Further, in the box sheet, the configuration of the bottom and lid of the box is not limited to the configuration in which the outer flap is folded on the inner flap (so-called A type or mandarin orange box type), for example, American lock Any configuration such as a type or a one-touch type can be adopted.

  The box sheet according to the present invention can be suitably used as a transport box and display tray that accommodates a plurality of products.

DESCRIPTION OF SYMBOLS 1 1st long side surface panel 2 1st short side surface panel 3 2nd long side surface panel 4 2nd short side surface panel 5 Joint 6 First lid outer flap 7 Second lid outer flap 8 First lid inner flap 9 2nd lid flap 10 1st bottom outside flap 11 2nd bottom outside flap 12 1st bottom inside flap 13 2nd bottom inside flap 14 Opening break easy line 15 Unfolding easy line 16 Insertion piece formation part 17 Opening formation part 18 First region 19 Second region 20 Break start piece 21 Base end ruled line

Claims (4)

A sheet for a box formed from one sheet material and assembled in a box shape,
It has four rectangular side panels connected in the left-right direction so that it can be assembled into a square cylinder,
Having four easy- to- break lines each formed to cross the four side panels ;
The easy break lines are formed on the left and right sides of each side panel and formed in a straight line extending in the left and right direction, and in the center of each side panel in the left and right direction and formed in a convex shape on the lower side. Divided into second areas,
Having a bending easier line four pairs of the upper corner portions inclined toward the boundary between the first region and the second region are formed respectively extend to the easy-fracture line of the four side panels A box sheet characterized by that.   The box sheet according to claim 1, wherein an inclination angle of the bending easy line with respect to a vertical direction is 30 ° or more and 60 ° or less. From the upper edge of the side panel vertical distance to the lower end of the folding easier line, according to claim 1 or claim 2 is 50% or less than 15% of the average length in the vertical direction of the side panel Box sheet. The box sheet according to claim 1 , wherein the easy break line is formed by being bent so as to define a tongue-like break starting piece at a laterally central portion of each side panel.

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