Box sheet, and box body

Abstract

To provide a box sheet capable of easily forming a lid part, and of sufficiently sealing a box body.SOLUTION: A box sheet according to the present disclosure comprises a pair of first side face panels and a pair of second side face panels that are connected alternately in a right and left direction, a pair of first top face panels extending from upper edges of the pair of first side face panels, and a pair of second top face panels extending from upper edges of the pair of second side face panels. The pair of first top face panels and the pair of second top face panels are connected alternately in a right and left direction. Each of the second top face panels is separated into an insertion piece, and a pair of folding pieces arranged on both sides of the insertion piece. A pair of engagement holes into each of which the insertion piece is inserted are formed to the pair of first top face panels. A lid part is assembled by inwardly folding the pair of first top face panels toward each other, and inserting the insertion pieces in the respective engagement holes.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a box sheet and a box body. [Background technology]

[0002] Boxes assembled from box sheets made of corrugated cardboard sheets and the like are widely used as packaging containers for goods. As such box sheets, those having a structure for facilitating opening and closing of the lid have been proposed (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Publication No. 53-110338 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Document 1 describes a box sheet that includes a pair of side surfaces and a pair of tab surfaces that are alternately connected in the left-right direction, a pair of top surfaces extending from the upper edges of the pair of side surfaces, and a pair of fold surfaces extending from the upper edges of the pair of tab surfaces, and the pair of top surfaces and the pair of fold surfaces are alternately connected in the left-right direction. The fold surfaces have a pair of fold lines that extend from a base edge on the outer side in the width direction toward a tip edge at an inward angle in the width direction. The box sheet is configured so that the tip edges of the pair of top surfaces are butted against each other to form a lid by folding the pair of fold surfaces by folding along the fold lines.

[0005] Patent Document 1 describes providing a slit at the boundary between the top surface and the folded surface, and forming an insert piece on the tab surface to be inserted into the slit. Patent Document 1 also describes that by inserting the insert piece into the slit, the box can be assembled very easily without using adhesive tape.

[0006] However, according to the configuration described in Patent Document 1, in order to make it easier to insert the insertion piece into the slit, it is necessary to provide the base end edge (lower edge) of the insertion piece at a position away from the upper edge of the grip surface. As a result, there is a risk that the strength of the grip surface will be insufficient or that unintended gaps will be formed in the grip surface.

[0007] The present disclosure has been made based on the above circumstances, and aims to provide a box sheet that allows for easy formation of a lid and is capable of sufficiently sealing the box body. [Means for solving the problem]

[0008] A box sheet according to one aspect of the present disclosure is a box sheet that can be assembled to a box body, and includes a pair of first side panels and a pair of second side panels that are alternately connected in the left-right direction, a pair of first top panels extending from upper edges of the pair of first side panels, and a pair of second top panels extending from upper edges of the pair of second side panels, the pair of first top panels and the pair of second top panels being alternately connected in the left-right direction, and the second top panels have a pair of cuts extending from their base edges to their tip edges. The folding piece is separated into an insertion piece that is located in the center in the width direction and a pair of folding pieces that are located on either side of the insertion piece, and an easy-to-fold line is formed in the folding piece, extending from the base edge on the outer side in the width direction and sloping inward in the width direction toward the tip side, and a pair of locking holes into which the insertion piece is inserted are formed in the first top panel, and the pair of first top panels are folded inward by bending the easy-to-fold line, and the insertion piece is inserted into the locking hole, thereby assembling the lid portion. Effect of the Invention

[0009] The box sheet according to one aspect of the present disclosure allows easy formation of a lid and can adequately seal the box body. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic plan view showing a box sheet according to one embodiment of the present disclosure. [Diagram 2] FIG. 2 is a schematic perspective view of a box formed by assembling the box sheets of FIG. [Diagram 3] FIG. 3 is a schematic plan view of the box of FIG. [Figure 4] FIG. 4 is a schematic plan view showing a state in which the lid of the box of FIG. 2 is being assembled. [Diagram 5] FIG. 5 is a schematic plan view showing a state in which the lid of the box shown in FIG. 2 is assembled. [Figure 6] FIG. 6 is a schematic plan view showing a state in which an invoice is attached to the lid of FIG. [Figure 7] FIG. 7 is a schematic perspective view showing a state in which the shipping label is being peeled off from the box of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] [Description of the embodiments of the present disclosure] First, the embodiments of the present disclosure will be listed and described.

[0012] (1) A box sheet according to one aspect of the present disclosure is a box sheet that can be assembled to a box body, and includes a pair of first side panels and a pair of second side panels that are alternately connected in the left-right direction, a pair of first top panels extending from upper edges of the pair of first side panels, and a pair of second top panels extending from upper edges of the pair of second side panels, the pair of first top panels and the pair of second top panels being alternately connected in the left-right direction, and the second top panels have a pair of cuts extending from their base edges to their tip edges. The folding piece is separated into an insertion piece that is located in the center in the width direction and a pair of folding pieces that are located on either side of the insertion piece, and the folding piece has an easy-to-fold line that extends from the base edge on the outer side in the width direction and slopes inward in the width direction toward the tip side, and the first top panel has a pair of locking holes into which the insertion piece is inserted, and the pair of first top panels are folded inward by bending the easy-to-fold lines, and the insertion piece is inserted into the locking holes to assemble the lid portion.

[0013] In the box sheet, the second top panel is separated into an insert piece arranged in the center in the width direction and a pair of folding pieces arranged on both sides of the insert piece by a pair of cuts extending from the base end edge to the tip end edge, and the lid of the box body can be formed by inserting the insert piece into a locking hole formed in the first top panel. Since the insert piece is defined in the second top panel, the box sheet can easily insert the insert piece into the locking hole. Furthermore, since the insert piece is defined in the second top panel, the box sheet can suppress the formation of a gap in the second side panel due to the insert piece. Therefore, the box sheet can easily form a lid and can adequately seal the box body.

[0014] (2) In the above item (1), the second side panel may be formed with an easy-to-break line connecting both ends of the base end edge of the insertion piece. With this configuration, the insertion piece can be easily removed from the locking hole after the box body is assembled.

[0015] (3) In the above (1) or (2), the leading edges of the pair of first top panels may be butted against each other in an assembled state, and a shipping label may be affixed to an area including the joint portion of the pair of first top panels exposed in an assembled state and the locking hole. With this configuration, the lid can be reliably sealed and unintentional opening of the lid can be easily and reliably prevented.

[0016] (4) In any of the above (1) to (3), the insertion piece may be expanded toward the tip end in the extension direction, and may have a pair of protrusions on both sides of the expanded portion that are inserted into the locking hole. With this configuration, the posture of the lid can be stabilized.

[0017] (5) A box according to another embodiment of the present disclosure includes a pair of first side panels and a pair of second side panels alternately connected in the left-right direction, a pair of first top panels extending from upper edges of the pair of first side panels, and a pair of second top panels extending from upper edges of the pair of second side panels, the pair of first top panels and the pair of second top panels being alternately connected in the left-right direction, the second top panel being separated by a pair of cuts extending from its base edge to its tip edge into an insert piece located in the center in the width direction and a pair of folding pieces located on both sides of the insert piece, the folding pieces having easy-fold lines extending from the base edge on the outer side in the width direction to the tip side at an inward angle in the width direction, the first top panel having a pair of locking holes into which the insert pieces are inserted, the pair of first top panels being folded inward by bending the easy-fold lines, and the lid is assembled by inserting the insert pieces into the locking holes.

[0018] In the box, the insertion piece is defined in the second top panel, so that the insertion piece can be easily inserted into the locking hole. In addition, in the box, the insertion piece is defined in the second top panel, so that the formation of a gap in the second side panel due to the insertion piece can be suppressed. Therefore, the box is easy to form a lid and has excellent sealing properties.

[0019] In this disclosure, "left-right direction" means the horizontal direction in a typical usage mode of a box formed by assembling the box sheet. "Top" means the top in a typical usage mode of a box formed by assembling the box sheet. "Inside" means the inside of the box.

[0020] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the drawings as appropriate. Note that each drawing is a schematic view and may not correspond to the actual dimensions, thickness, etc. Also, in this disclosure, the descriptions "first" and "second" are intended to distinguish the components to which they are attached, and do not limit the number, order, priority, etc.

[0021] [Box Sheet] The box sheet 10 in Fig. 1 can be assembled into a box body, and more specifically, is assembled into a box body 20 in Fig. 2 and Fig. 3. The box sheet 10 includes a pair of first side panels 1 and a pair of second side panels 2 that are alternately connected in the left-right direction, a pair of first top panels 3 that extend from upper edges of the pair of first side panels 1, and a pair of second top panels 4 that extend from upper edges of the pair of second side panels 2. The pair of first top panels 3 and the pair of second top panels 4 are alternately connected in the left-right direction. The box sheet 10 also includes bottom flaps (first bottom flap 5a to fourth bottom flap 5d) extending from the lower edges of the pair of first side panels 1 and the pair of second side panels 2, a first joint 6a extending from the outer side edge in the left-right direction of the first side panel 1 located on the outer side in the left-right direction (left side in FIG. 1) of the pair of first side panels 1, and a second joint 6b extending from the outer side edge in the left-right direction of the first top panel 3 located on the outer side in the left-right direction (left side in FIG. 1) of the pair of first top panels 3. The first joint 6a and the second joint 6b are separated by a cut. In the box sheet 10, easy-to-fold lines are formed at the boundary between the first side panel 1 and the second side panel 2, the boundary between the first side panel 1 and the first top panel 3 and the bottom flaps 5a and 5c, the boundary between the second side panel 2 and the second top panel 4 and the bottom flaps 5b and 5d, the boundary between the first side panel 1 and the first joint 6a, and the boundary between the first top panel 3 and the second joint 6b. Examples of the easy-to-fold lines include creases formed by creasing one side of the sheet, and lead creases in which creases and cut lines are alternately arranged in succession. In this disclosure, "bottom" means the bottom in a typical usage mode assumed for a box formed by assembling the box sheet.

[0022] The second top panel 4 is separated by a pair of cuts 4a extending from its base end edge to its tip end edge into an insertion piece 11 located in the center in the width direction and a pair of folding pieces 12 located on both sides of the insertion piece 11. The folding piece 12 is formed with an easy-to-fold line 12a extending from the base end edge on the outside in the width direction (the outside in the width direction of the entire second top panel 4) to the tip end edge side at an incline toward the inside in the width direction (the inside in the width direction of the entire second top panel 4). The first top panel 3 is formed with a pair of locking holes 3a into which the insertion piece 11 is inserted. The box sheet 10 is provided so that the pair of first top panels 3 are folded inward by bending the easy-to-fold line 12a, and the lid part 21 is assembled by inserting the insertion piece 11 into the locking hole 3a.

[0023] In the box sheet 10, the second top panel 4 is separated into an insertion piece 11 arranged in the center of the width direction and a pair of folding pieces 12 arranged on both sides of the insertion piece 11 by a pair of cuts 4a extending from the base end edge to the tip end edge, and the lid portion 21 of the box body 20 can be formed by inserting the insertion piece 11 into the locking hole 3a formed in the first top panel 3. Since the insertion piece 11 of the box sheet 10 is defined in the second top panel 4, the insertion piece 11 can be easily inserted into the locking hole 3a. Furthermore, since the insertion piece 11 of the box sheet 10 is defined in the second top panel 4, the formation of a gap in the second side panel 2 due to the insertion piece 11 can be suppressed. Furthermore, since the folding pieces 12 are located on both sides of the insertion piece 11, the box sheet 10 can also suppress the formation of a gap between the second side panel 2 and the lid portion 21 of the box body 20. Therefore, the box sheet 10 makes it easy to form the lid portion 21 and can adequately seal the box body 20.

[0024] A procedure for assembling the box sheet 10 into the box body 20 will be described. First, the first side panel 1 arranged on the outer side in the left-right direction (left side of FIG. 1) is folded over the inner surface of the second side panel 2 connected to the first side panel 1, and the second side panel 2 arranged on the outer side in the left-right direction (right side of FIG. 1) is folded over the inner surface of the first side panel 1 connected to the second side panel 2. As a result, the first top panel 3 arranged on the outer side in the left-right direction (left side of FIG. 1) is folded over the inner surface of the second top panel 4 connected to the first top panel 3, and the second top panel 4 arranged on the outer side in the left-right direction (right side of FIG. 1) is folded over the inner surface of the first top panel 3 connected to the second top panel 4. Next, the first joint 6a is attached to the inner surface of the folded second side panel 2, and the second joint 6b is attached to the inner surface of the folded second top panel 4. At this time, the folding piece 15a on the second bottom flap 5b side of the first bottom flap 5a is attached to the second bottom flap 5b, and the folding piece 15c on the fourth bottom flap 5d side of the third bottom flap 5c is attached to the fourth bottom flap 5d, and the first bottom flap 5a to the fourth bottom flap 5d are folded over the inner surfaces of the pair of first side panels 1 and the pair of second side panels 2.

[0025] Next, the pair of first side panels 1 and the pair of second side panels 2, which are connected endlessly, and the pair of first top panels 3 and the pair of second top panels 4 are spread out into a rectangular tube shape, and the first bottom flaps 5a to the fourth bottom flaps 5d are combined to assemble the bottom of the box body. Then, after placing a desired item on the bottom, as shown in FIG. 4, the easy-to-fold lines 12a formed on each of the four folding pieces 12 are folded in a valley fold (so as to be convex toward the inside of the box body 20), and the pair of first top panels 3 are folded inward so that their leading edges butt against each other. Furthermore, as shown in FIG. 5, the pair of insertion pieces 11 are overlapped on the outer surfaces of the pair of top panels 3 so as to cover the joint between the pair of first top panels 3, and the protrusions 11a described below are inserted into the locking holes 3a formed in the first top panels 3. This allows the lid 21 of the box body 20 to be assembled. The box body 20 itself is an embodiment of the present disclosure.

[0026] The box 20 can be used, for example, as a packaging container for home delivery. Therefore, as shown in Fig. 6, the box 20 may have a shipping label 30 attached to cover the joints between the pair of first top panels 3, the four locking holes 3a, and the protrusions 11a inserted into these locking holes 3a. By configuring in this way, the box 20 shown in Figs. 1 and 2 is obtained.

[0027] In the box 20, the insertion piece 11 is defined in the second top panel 4, so that the insertion piece 11 can be easily inserted into the locking hole 3a. In addition, in the box 20, the insertion piece 11 is defined in the second top panel 4, so that the formation of a gap in the second side panel 2 due to the insertion piece 11 can be suppressed. Furthermore, in the box 20, the folding pieces 12 are located on both sides of the insertion piece 11, so that the formation of a gap between the second side panel 2 and the lid portion 21 can also be suppressed. Therefore, in the box 20, the lid portion 21 is easy to form and has excellent sealing properties.

[0028] The box sheet 10 is a single sheet body. The sheet used for the box sheet 10 is not particularly limited as long as it has a strength sufficient to maintain the shape of the box body 20 formed by assembling the box sheets 10, and examples thereof include cardboard sheets, paper sheets such as cardboard, synthetic resin sheets, and laminated sheets of paper sheets and synthetic resin sheets. Among them, paper sheets are preferred in terms of processability, shock absorption, handling, recyclability, and economic efficiency, and cardboard sheets are particularly preferred. The cardboard sheets forming the box sheet 10 are those in which a corrugated core formed from base paper is bonded to a liner, and examples thereof include a single-sided cardboard sheet in which a corrugated core is bonded to a liner, a double-sided cardboard sheet in which a liner is further bonded to the top of the corrugation of a single-sided cardboard sheet, a double-sided cardboard sheet in which a top of the corrugation of a single-sided cardboard sheet is bonded to one side of a double-sided cardboard sheet, and a quadruple-double-sided cardboard sheet in which a top of the corrugation of a single-sided cardboard sheet is further bonded to one side of a double-sided cardboard sheet. Among these, double-sided corrugated cardboard sheets are preferred from the standpoints of processability, economy, durability, and the like.

[0029] (Side Panel) The pair of first side surface panels 1 are formed in a rectangular shape and in substantially the same shape. The left-right length of the first side surface panel 1 may be greater than the left-right length of the second side surface panel 2. In this case, the first side surface panel 1 is configured as a length surface panel that forms the length surface of the box body 20.

[0030] The first side panel 1 may have a larger left-right length than a top-bottom length. The lower limit of the ratio of the top-bottom length to the left-right length of the first side panel 1 may be 0.1 or 0.15 from the viewpoint of being able to store desired items. On the other hand, the upper limit of the ratio may be 0.5, 0.3, or 0.25 from the viewpoint of ease of use for home delivery.

[0031] The length of the first side panel 1 in the left-right direction is not particularly limited, but may be, for example, 200 mm or more and 450 mm or less.

[0032] The pair of second side panels 2 are formed in a rectangular shape and are substantially the same shape. The vertical length of the second side panel 2 can be the same as the vertical length of the first side panel 1. When the left-right length of the second side panel 2 is smaller than the left-right length of the first side panel 1, the second side panel 2 is configured as a width panel that forms the width surface of the box body 20.

[0033] The second side panel 2 has an easy break line 2a that connects both ends of the base edge of the insertion piece 11. The easy break line 2a may be provided only on one of the pair of second side panels 2, but it is preferable that the easy break line 2a is provided on both second side panels 2. Since the easy break line 2a is formed on the second side panel 2 of the box sheet 10, the insertion piece 11 can be easily removed from the locking hole 3a after the box body 20 is assembled. To explain in detail, when a shipping label 30 is attached to the lid portion 21 of the box body 20, the shipping label 30 is attached to both the first top panel 3 and the insertion piece 11. Therefore, while it is possible to prevent the insertion piece 11 from being unintentionally removed from the locking hole 3a, it may become difficult to open the lid portion 21. In contrast, by forming an easy break line 2a connecting both ends of the base end edge of the insertion piece 11, as shown in Fig. 7, by breaking the easy break line 2a and then lifting the insertion piece 11 and the removal portion 2b of the second side panel 2 separated integrally with the insertion piece 11 from the breaking side, the insertion piece 11 can be easily removed from the locking hole 3a while peeling the invoice 30 from the first top panel 3. Then, by further moving the insertion piece 11 in the direction in which the invoice 30 is peeled off, the invoice 30 can be removed from the first top panel 3. As a result, the lid portion 21 can be easily opened.

[0034] The breakable line 2a is, for example, arc-shaped. With this configuration, the breakable line 2a can be easily broken, and the insertion piece 11 can be easily lifted using the portion (removed portion 2b) of the second side panel 2 that is removed by breaking the breakable line 2a. As a result, the invoice 30 can be easily peeled off from the first top panel 3, and the pair of protrusions 11a can be easily pulled out from the locking hole 3a. The type of the breakable line 2a is not particularly limited, but may be, for example, a perforation.

[0035] (Top panel) The pair of first top panels 3 are formed in a rectangular shape and are substantially the same shape. The width of the first top panel 3 can be the same as the left-right length of the first side panel 1. The extension length of the first top panel 3 can be 1 / 2 the left-right length of the second side panel 2. The pair of first top panels 3 are provided such that their leading edges butt against each other in the assembled state, with the extension length being 1 / 2 the left-right length of the second side panel 2.

[0036] As described above, each of the pair of first top panels 3 has a pair of locking holes 3a. The pair of locking holes 3a are formed symmetrically with respect to the center line in the width direction of the first top panel 3. The pair of locking holes 3a formed in each of the first top panels 3 are configured to receive protruding portions 11a of different insertion pieces 11.

[0037] The locking hole 3a is formed by, for example, a slit penetrating the first top panel 3 in the thickness direction. The slit may be U-shaped, having a pair of first straight line parts arranged at intervals in the extension direction of the first top panel 3 and parallel to the base end edge of the first top panel 3, and a second straight line part connecting the inner ends of the pair of first straight line parts (the inner ends in the width direction of the first top panel 3). The second straight line part may be inclined from the outer side to the inner side in the width direction of the first top panel 3 toward the tip side in the extension direction of the first top panel 3. This configuration makes it easy to insert and remove the protrusion 11a into and from the locking hole 3a. The first top panel 3 may also have an easy-to-bend line 3b connecting the outer ends of the first straight line parts.

[0038] The pair of locking holes 3a are disposed on the leading edge side of the first top panel 3. The distance between the leading edge of the first top panel 3 and the locking holes 3a may be, for example, 10 mm or more and 20 mm or less. The distance between the pair of locking holes 3a may be smaller than the length of the long side of the invoice. The distance between the pair of locking holes 3a may be, for example, 50 mm or more and 150 mm or less.

[0039] The pair of second top panels 4 are formed in a substantially rectangular and substantially identical shape. The width of the second top panel 4 can be the same as the left-right length of the second side panel 2. The extension length of the second top panel 4 can be the same as the extension length of the first top panel 3.

[0040] As described above, the second top panel 4 has the insertion piece 11 located in the center in the width direction, and a pair of folding pieces 12 located on both sides of the insertion piece 11. The insertion piece 11 and the pair of folding pieces 12 are separated by the cutout 4a.

[0041] The second top panel 4 is separated into the insert piece 11 and the pair of folding pieces 12 by the pair of cuts 4a, which prevents an increase in the sheet area caused by having the insert piece 11. Therefore, the box sheet 10 can conserve resources.

[0042] The insertion piece 11 is separated from the pair of folding pieces 12 by the pair of notches 4a, and is supported in a cantilever shape by its base end edge. The insertion piece 11 is strip-shaped with the extension direction as the longitudinal direction. In the assembled state, the insertion piece 11 is arranged so as to cover the joint portion of the pair of first top panels 3. The insertion piece 11 also has an easy-to-fold line 11e that extends parallel to the base end edge. The easy-to-fold line 11e is formed on the tip side of the insertion piece 11. By bending the easy-to-fold line 11e, the projection 11a of the insertion piece 11 can be easily inserted into the locking hole 3a.

[0043] The insert piece 11 is widened toward the tip side in the extension direction. The insert piece 11 has a pair of protrusions 11a on both sides of the widened portion. The box sheet is configured in this way, so that the attitude of the lid portion 21 can be stabilized. That is, by reducing the length of the base end edge of the insert piece 11, the overlapping portion between the folding piece 12 and the first top panel 3 in the base end side region of the second top panel 4 in the assembled state becomes large, and it becomes easier to hold the first top panel 3 parallel to the bottom of the box body 20. In addition, since the insert piece 11 is widened toward the tip side, the pair of first top panels 3 can be reliably supported from the outside by the insert piece 11, and the pair of first top panels 3 can be prevented from floating up. Furthermore, with this configuration, after breaking the easy-to-break line 2a, the invoice 30 can be easily peeled off from the first top panel 2 by using the insertion piece 11 and the removal portion 2b as handles, and the pair of protrusions 11a can be easily removed from the engagement hole 3a.

[0044] The insertion piece 11 has a widening portion 11c that widens from its base end edge toward the tip side in the extension direction, and a rectangular tip portion 11d that is continuous with the tip side of the widening portion 11c. The above-mentioned easy bending line 11e is formed at the boundary between the widening portion 11c and the tip portion 11d.

[0045] The tip 11d has a pair of protruding parts 11a and a pressing part 11b disposed between the pair of protruding parts 11a. The pair of protruding parts 11a protrude in the extension direction on both sides in the width direction of the tip 11d. The pressing part 11b is, for example, partially circular. By having the pair of protruding parts 11a and the pressing part 11b, the insertion piece 11 can stably maintain the state inserted into the locking hole 3a.

[0046] The pair of folding pieces 12 are folded in half along an easy-to-fold line 12a. The easy-to-fold line 12a extends from the outer end of the base end edge of the folding piece 12 toward the tip end at an angle of 45° with respect to the base end edge.

[0047] [Waybill] The box sheet 10 is provided so that the shipping label 30 can be attached to an area including the joint portion of the pair of first top panels 3 that is exposed in the assembled state and the locking hole 3a. With this configuration, the lid portion 21 of the box body 20 can be reliably sealed, and unintentional opening of the lid portion 21 can be easily and reliably prevented.

[0048] The shipping label 30 is attached to the outer surface of the cover 21 so as to cover the joints of the pair of first top panels 3, the locking holes 3a, and the protrusions 11a that are exposed in the assembled state. This prevents the joints of the pair of first top panels 3 from being exposed to the outside by the shipping label 30 and the pair of insertion pieces 11. The shipping label 30 may be attached so as to completely cover the tips 11d of the pair of insertion pieces 11.

[0049] (Bottom flap) The first bottom flap 5a to the fourth bottom flap 5d have a so-called one-touch type configuration. More specifically, the first bottom flap 5a and the second bottom flap 5b adjacent to the first bottom flap 5a are pre-attached together before assembling the bottom, and the third bottom flap 5c and the fourth bottom flap 5d adjacent to the third bottom flap 5c are pre-attached together before assembling the bottom. The first bottom flap 5a to the fourth bottom flap 5d are formed by spreading the pair of first side panels 1 and the pair of second side panels 2 into a rectangular tube shape, so that the first bottom flap 5a slides inside the fourth bottom flap 5d and the third bottom flap 5c slides inside the second bottom flap 5b. This allows the bottom of the box body 20 to be assembled.

[0050] [Other embodiments] The above-mentioned embodiment does not limit the configuration of the present invention. Therefore, the above-mentioned embodiment may omit, replace or add components of each part of the above-mentioned embodiment based on the description in this specification and common technical knowledge, and it should be construed that all of these are within the scope of the present invention.

[0051] In the above embodiment, a configuration has been described in which the easy break line provided on the second side panel is arc-shaped. However, in the box sheet, the shape of the easy break line is not limited, and for example, the easy break line may be formed along the upper edge of the second side panel. In addition, the box sheet does not exclude a configuration in which the easy break line is not formed on the second side panel.

[0052] As described above, the box sheet can be suitably used as a packaging container for home delivery by attaching a shipping label to the seam between the pair of first top panels. However, whether or not to attach a shipping label to the seam between the pair of first top panels can be selected depending on the purpose of use, etc.

[0053] In the box sheet, the specific configuration of the insertion piece is not limited to the configuration described in the above embodiment. For example, the insertion piece may be configured not to widen toward the tip side in the extension direction. In addition, the insertion piece may be configured not to have the pair of protrusions (a portion other than the protrusions is inserted into the locking hole).

[0054] The structure of the box sheet for assembling the bottom of the box is not particularly limited. For example, the box sheet may be configured to be assembled to the bottom of an A-type box (a type of box containing oranges) or to the bottom of an American-lock box. [Explanation of symbols]

[0055] 1 First Side Panel 2 Second Side Panel 2a Easy-to-break wire 2b Removal section 3 First top panel 3a Locking hole 3b Easy bending line 4 Second top panel 4a Cut 5a 1st bottom flap 5b Second bottom flap 5c 3rd bottom flap 5d 4th bottom flap 6a 1st passage 6b 2nd passage 10 Box Sheets 11 Insert 11a Projection 11b Holding part 11c Widening section 11d Tip 11e Easy-to-bend wire 12 Folding piece 12a Easy bending line 15a, 15c Bending piece 20 box body 21 Lid 30 Waybill

Claims

1. A box sheet that can be assembled to a box body, A pair of first side panels and a pair of second side panels alternately connected in the left-right direction; a pair of first top panels extending from upper edges of the pair of first side panels; a pair of second top panels extending from upper edges of the pair of second side panels; Equipped with The pair of first top panels and the pair of second top panels are alternately connected in the left-right direction, The second top panel is separated by a pair of cuts extending from its base end edge to its tip end edge into an insert piece disposed in the center portion in the width direction and a pair of folding pieces disposed on both sides of the insert piece, The folding piece has an easy-to-fold line formed thereon, the easy-to-fold line extending from a base end edge on the outer side in the width direction to a tip end side while inclining inward in the width direction, A pair of locking holes into which the insertion pieces are inserted are formed in the first top panel, The box sheet is configured so that the pair of first top panels are folded inwardly along the easy folding lines, and the lid portion is assembled by inserting the insertion pieces into the engagement holes.

2. 2. The box sheet according to claim 1, wherein the second side panel is formed with an easy break line connecting both ends of the base end edge of the insertion piece.

3. The pair of first top panels are provided so that their leading edges are butted against each other in an assembled state, 3. A box sheet as claimed in claim 1 or 2, wherein a shipping label is attached to an area including the joint portion of the pair of first top panels exposed in an assembled state and the locking hole.

4. 3. A box sheet as described in claim 1 or claim 2, wherein the insertion piece is wider toward the tip side in the extension direction, and has a pair of protrusions on both sides of this wider portion that are inserted into the locking hole.

5. A pair of first side panels and a pair of second side panels alternately connected in the left-right direction; a pair of first top panels extending from upper edges of the pair of first side panels; a pair of second top panels extending from upper edges of the pair of second side panels; Equipped with The pair of first top panels and the pair of second top panels are alternately connected in the left-right direction, The second top panel is separated by a pair of cuts extending from its base end edge to its tip end edge into an insert piece disposed in the center portion in the width direction and a pair of folding pieces disposed on both sides of the insert piece, The folding piece has an easy-to-fold line formed thereon, the easy-to-fold line extending from a base end edge on the outer side in the width direction to a tip end side while inclining inward in the width direction, A pair of locking holes into which the insertion pieces are inserted are formed in the first top panel, The box body has a lid portion assembled by folding the pair of first top panels inwardly by bending the easy bending lines and inserting the insertion pieces into the locking holes.

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