JP2020183268A - Box sheet - Google Patents

Abstract

To provide a box sheet that can be assembled in a tray shape and can reduce a box producing cost.SOLUTION: A box sheet of the present invention includes a pair of first side panel and a pair of second side panels which are alternately connected from one side to the other side in a left-right direction and assembled in a square cylinder shape, and a pair of connecting flaps that extend from the top edge of the pair of the second side panels and fold inward; and can be assembled into a box shape with an upper opening formed between a pair of connecting flaps. The first side panel has a substantially rectangular body and a projection piece projecting from a part of an upper edge of the body. The projection piece has a base end part continuous from the upper edge of the body and an increased wide part continuous upward from the base end part. The connecting flap has a top surface part that is bridged between the upper edges of the pair of first side panels in the assembled state and a folded part that extends from the side edge of the top surface part. The connecting flap is configured to be lockable between the body and the increased wide part at a boundary part between the top surface part and the folded part.SELECTED DRAWING: Figure 1

Description

The present invention relates to a box sheet.

A box body formed by assembling a box sheet composed of a corrugated cardboard sheet or the like is widely used as a container for storing and transporting articles. As the box body, for example, a tray-shaped box having a substantially rectangular bottom plate and four side plates extending upward from the side sides of the bottom plate and opening upward is used.

Generally, a tray-shaped box body is assembled from a sheet body having a substantially rectangular bottom panel forming a bottom plate and four side plate forming panels extending from each side of the bottom panel to form side plates (special feature). (See Kai 2015-63325).

JP-A-2015-63325

However, the tray-shaped box body as described in the above publication has a high cost required for the box making machine, and the box making cost is high.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a box sheet that can be assembled in a tray shape and that can reduce the cost of box making.

The box sheet according to the present invention made to solve the above problems is a pair of first side panel and a pair of second side surfaces which are alternately connected from one side in the left-right direction to the other side and assembled into a square cylinder. It is provided with a panel and a pair of connecting flaps extending from the upper edge of the pair of second side panel and bent inward, and can be assembled into a box shape in which an upper opening is formed between the pair of connecting flaps. The first side panel has a substantially rectangular main body and a protrusion protruding from a part of the upper edge of the main body, and the protrusion has a base end portion continuous from the upper edge of the main body and the base end thereof. A bent portion having a widening portion continuous upward from the portion, and the connecting flap extending from the top surface portion extending between the upper edges of the pair of first side panel panels and the side edges of the top surface portion in the assembled state. The connecting flap is configured to be lockable between the main body and the widening portion at the boundary portion between the top surface portion and the bent portion.

The box sheet is configured such that a connecting flap extending from the upper edge of the second side panel can be locked between the main body and the widening portion of the first side panel at the boundary between the top surface and the bent portion. As a result, the contents can be supported from above by the top surface portion, and another box body can be stacked on the top surface portion to form a tray-shaped box body. The box sheet is formed by assembling each pair of the first side panel and the second side panel into a square cylinder, and a box making machine for type A (so-called orange box type) is used. It is possible to make boxes at low cost.

The box sheet may further include a folded flap that extends from the upper edge of the main body and is folded back toward the inner surface side of the main body in the assembled state. In this way, by further providing a folded flap that extends from the upper edge of the main body and is folded back to the inner surface side of the main body in the assembled state, the article housed in the box can be pressed from the side by the folded flap. It is possible to suppress wobbling of this article in the box and stably hold this article in the box.

It is preferable that the folded flap surrounds the projecting piece. In this way, since the folded flap surrounds the projecting piece, it is possible to more reliably suppress the wobbling of the article contained in the box inside the box, and the folded flap causes unintended damage to the projecting piece. Can be suppressed.

It is preferable that the folded flap and the bent portion are separably connected by a breakable line. In this way, the folded flap and the bent portion are separably connected by the easy-to-break line, so that the easy-to-break line is broken in accordance with the assembly stage, and the above-mentioned folding at the time of box making. It is possible to prevent unintended contact of the curved portion.

It is preferable that the connecting flap has a slit for separating the tip portions of the top surface portion and the bent portion, and the base end portion can be fitted into the slit. As described above, the connecting flap has a slit for separating the tip portions of the top surface portion and the bent portion, and the base end portion is configured to be able to be fitted into the slit, whereby the connecting flap is configured. Can be easily and securely locked between the main body and the widening portion.

The box sheet may not have an easily bendable line at the boundary between the main body and the projecting piece. As described above, by not having an easy-to-bend line at the boundary between the main body and the projecting pieces, it is easy to make the pair of the projecting pieces function as guides for supporting the other boxes to be stacked from both sides in the left-right direction.

In the present invention, the "left-right direction" refers to the horizontal direction in a general usage mode assumed in a box body formed by assembling a box sheet. "Upper" means above with reference to the left-right direction. "Inside" means the inner surface side of the box.

As described above, the box sheet according to the present invention can be assembled in a tray shape, and the box making cost can be suppressed.

FIG. 1 is a schematic plan view showing a box sheet according to an embodiment of the present invention. FIG. 2 is a schematic perspective view showing a box body formed by assembling the box sheet of FIG. 1. FIG. 3 is a schematic plan view of the box body of FIG. FIG. 4 is a schematic plan view showing a state in which a pair of first side panels and a pair of second side panels of the box sheet of FIG. 1 are connected in an endless manner. FIG. 5 is a schematic partially enlarged perspective view showing a locking structure of the connecting flap in the box body of FIG. FIG. 6 is a schematic partially enlarged view showing a connecting portion between the connecting flap and the folded flap of the box sheet of FIG. 1.

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

[First Embodiment]
The box sheet 1 of FIG. 1 is composed of one sheet. The box sheet 1 is a pair of first side panel 11 and a pair of second side panels 12 which are alternately connected from one side to the other in the left-right direction and assembled into a square cylinder, and a pair of second side panels. It is provided with a pair of connecting flaps 13 extending from the upper edge of 12 and bent inward. Further, the box sheet 1 includes a pair of folded flaps 14 extending from the upper edge of the pair of first side panel 11 (specifically, the upper edge of the main body 11a described later). Further, the box sheet 1 has a pair of outer bottom flaps 15 extending from the lower edge of the pair of first side surface panels 11 and a pair of inner bottom flaps extending from the lower edge of the pair of second side surface panels 12. 16 and a glue allowance 17 connected to a side edge opposite to the side connected to the second side panel 12 of the first side panel 11 located on the outer side in the left-right direction. In FIG. 1, a thick solid line indicates a cutting line formed by cutting a sheet, and a thin solid line indicates a ruled line formed by pressing a streak on the inner surface of the sheet. Further, in the present specification, "below" means below with respect to the left-right direction.

The box sheet 1 can be assembled into a box shape in which an upper opening is formed between the pair of connecting flaps 13, and specifically, the box sheet 1 is assembled into the box body 2 shown in FIGS. 2 and 3. The procedure for assembling the box body 2 will be described. First, as shown in FIG. 4, the first side surface panel 11 (the first side surface panel 11 to which the glue margin 17 is connected) located on the outer side in the left-right direction is connected to the first side surface panel 11. The second side panel 12 located on the outer side in the left-right direction (the side opposite to the side where the glue margin 17 is provided) is folded on the inner surface of the first side panel 11 connected to the second side panel 12. , The glue margin 17 is attached to the inner surface of the folded second side panel 12.

Subsequently, a pair of first side panel 11s and a pair of second side panels 12 connected in an endless manner are expanded into a square cylinder, and a pair of bottom inner flaps 16 are bent inward to form a pair of bottom outer flaps 15. Bend inward and abut the tip edges against each other to assemble the bottom of the box 2. Next, the pair of folded flaps 14 are folded back toward the inner surface side of the pair of first side panel 11, and then the pair of connecting flaps 13 are bent inward so as to bridge between the upper edges of the pair of first side panels 11. The connection flap 13 of the above is locked to the first side panel 11.

The box sheet 1 is provided to a user of the box body 2 in a state where a pair of first side panel 11s and a pair of second side panels 12 are connected endlessly. In this endlessly connected state, the connecting flap 13 and the folded flap 14 are connected via an easily breakable wire 22, which will be described later. It is preferable that the box sheet 1 separates the connecting flap 13 and the folded flap 14 when the user assembles the box body 2. As shown in FIG. 2, for example, a sealing tape X is attached to the abutting portion between the tip edges of the pair of bottom outer flaps 15, thereby sealing the lower opening of the box body 2.

The sheet used for the box sheet 1 is not particularly limited as long as it has enough strength to maintain the shape of the box body 2 formed by assembling the box sheet 1 and has an appropriate repulsive force. However, a corrugated cardboard sheet is typically used. The corrugated cardboard sheet forming the box sheet 1 is a corrugated cardboard sheet in which a core formed of a base paper in a wavy shape is attached to a liner. For example, a core formed in a wavy shape is attached to a single liner. Single-sided corrugated cardboard sheet, double-sided corrugated cardboard sheet with a liner attached to the top of the single-sided corrugated board, double-sided corrugated cardboard sheet with the top of the single-sided corrugated cardboard attached to one side of the double-sided corrugated cardboard Examples thereof include a double-sided corrugated cardboard sheet in which the tops of the single-sided corrugated cardboard sheets are further bonded. Among these, double-sided corrugated cardboard sheets are preferable from the viewpoints of workability, economy, durability and the like. When the sheet is a double-sided corrugated cardboard sheet, the sheet thickness of the box sheet 1 can be, for example, about 1.5 mm or more and 5 mm or less.

(1st side panel)
The pair of first side panel 11s are formed to have substantially the same shape. The first side panel 11 has a substantially rectangular main body 11a and a projecting piece 11b protruding from a part of the upper edge of the main body 11a. The main body 11a is connected to the second side surface panel 12 in the left-right direction, and forms a side wall of the box body 2 together with the second side surface panel 12. The left-right length of the main body 11a is larger than the left-right length of the second side panel 12. That is, the first side surface panel 11 is a length surface panel in which the main body 11a forms the length surface of the box body 2.

The length of the main body 11a in the left-right direction can be appropriately set based on the size of the articles to be housed in the box 2, but can be, for example, 20 cm or more and 50 cm or less. The vertical length of the main body 11a can be appropriately set based on the size of the articles to be housed in the box 2, but can be, for example, 10 cm or more and 50 cm or less.

The projecting piece 11b projects upward from the central portion in the left-right direction of the main body 11a. Preferably, the projecting piece 11b has a symmetrical shape with respect to the center position in the left-right direction of the main body 11a. The projecting piece 11b has a base end portion 21a continuous from the upper edge of the main body 11a and a widening portion 21b continuous upward from the base end portion 21a.

The base end portion 21a has a rectangular shape having a large horizontal length with respect to the vertical length. The vertical length L1 of the base end portion 21a is set to be equal to or larger than the sheet thickness of the box sheet 1. The lower limit of the ratio of the vertical length L1 of the base end portion 21a to the sheet thickness of the box sheet 1 is 1.0, preferably 2.0, and more preferably 2.5. On the other hand, as the upper limit of the above ratio, 5.0 is preferable, and 3.5 is more preferable. If the above ratio does not reach the above lower limit, it may be difficult to lock the connecting flap 13 between the main body 11a and the widening portion 21b. On the contrary, when the above ratio exceeds the above upper limit, the connection flap 13 may easily wobble in the vertical direction in the locked state of the connection flap 13.

The widening portion 21b has a pair of left and right lower edges 21c facing the upper edge of the main body 11a, and a pair of left and right side edges 21d continuous from these lower edges 21c and extending upward. The pair of lower edges 21c are arranged parallel to the upper edge of the main body 11a. The pair of side edges 21d has a first portion continuous from the pair of lower edges 21c and extending upward and outward in the left-right direction, and a second portion continuous from the first portion and extending upward and inward in the left-right direction. The first portion is, for example, linear. The second portion is curved upward and outward in the left-right direction, for example.

It is preferable that an easy-to-bend line is not formed at the boundary between the main body 11a and the projecting piece 11b. The box sheet 1 does not have an easy-to-bend line at the boundary between the main body 11a and the projecting piece 11b, so that the box sheet 1 functions as a fixing member for fixing the pair of projecting pieces 11b and the pair of connecting flaps 13. In addition, it is easy to function as a guide that supports other stacked boxes from both sides in the left-right direction.

(Second side panel)
The pair of second side panel 12s are formed in a rectangular shape and substantially the same shape. The pair of second side panel 12s are width surface panels forming the width surface of the box body 2. The vertical length of the pair of second side panel 12s can be substantially the same as the vertical length of the main body 11a of the pair of first side panels 11.

The length of the pair of second side panels 12 in the left-right direction can be appropriately set based on the size of the articles to be housed in the box 2, but can be, for example, 15 cm or more and 40 cm or less.

(Connection flap)
The connection flap 13 extends from the top surface portion 13a and the side edges of the top surface portion 13a that are bridged between the upper edges of the pair of first side panel 11s (more specifically, between the upper edges of the pair of main bodies 11a) in the assembled state. It has a bent portion 13b to be used. Further, the connecting flap 13 has a slit 13c that separates the tip portions of the top surface portion 13a and the bent portion 13b from each other. As shown in FIGS. 2, 3 and 5, the connecting flap 13 is configured to be lockable between the main body 11a and the widening portion 21b at the boundary portion between the top surface portion 13a and the bent portion 13b.

The top surface portion 13a is connected to the upper edge of the second side surface panel 12. The top surface portion 13a is bent inward substantially perpendicular to the second side surface panel 12 in the assembled state. As a result, the top surface portion 13a functions as a support portion that supports the contents from above in the box body 2 and suppresses the contents from falling off, and also functions as a pedestal when stacking other box bodies.

The width of the top surface portion 13a can be the same as the length in the left-right direction of the second side surface panel 12 to which the top surface portion 13a is connected. In other words, the top surface portion 13a can be configured to have a side edge extending linearly from the side edge of the second side surface panel 12.

The bent portion 13b projects from the side edge of the top surface portion 13a to the side of the first side surface panel 11 adjacent to the second side surface panel 12 to which the top surface portion 13a is connected.

The tip portions of the top surface portion 13a and the bent portion 13b are separated from each other by the slit 13c described above. More specifically, the connecting flap 13 is continuous from the side edge of the second side panel 12, and has an easy-to-bend line 13d and the easy-to-bend line 13d that can bend the top surface portion 13a and the bent portion 13b at the boundary between the two. It has a slit 13c continuous from. The easily bendable line 13d and the slit 13c are formed in a straight line as a whole. As a result, as shown in FIG. 5, the connecting flap 13 bends the bent portion 13b downward along the easy-to-bend line 13d in a state where the top surface portion 13a is bridged between the upper edges of the pair of main bodies 11a, and the slit 13c. It is configured so that the base end portion 21a can be sandwiched between the side edges of the top surface portion 13a and the bent portion 13b that define the above. That is, the box sheet 1 is configured such that the base end portion 21a can be fitted into the slit 13c by having the connecting flap 13 having the slit 13c. Thereby, the box sheet 1 can easily and surely lock the connection flap 13 between the main body 11a and the widening portion 21b.

The easy-to-bend line 13d may be a ruled line in which one side of the sheet material is squeezed, but a plurality of cutting lines and a plurality of ruled lines are used so that the line can be reliably bent at the boundary between the top surface portion 13a and the bent portion 13b. Is preferably a continuous lead ruled line alternately.

When the base end portion 21a is configured to be fitted into the slit 13c, as shown in FIG. 6, the total length (L2 + L3) of the easy-to-bend line 13d and the slit 13c is adjacent to the easy-to-bend line 13d and the slit 13c. The length of the upper edge of the main body 11a (the length of the upper edge of the main body 11a extending from the side edge of the base end portion 21a to the side of the easy-to-bend line 13d) is larger than L4. Further, the length L2 of the easy-to-bend line 13d alone is smaller than the length L4 of the upper edge of the main body 11a adjacent to the easy-to-bend line 13d.

As the lower limit of the difference between the total length (L2 + L3) of the easily bendable line 13d and the slit 13c and the length L4 of the upper edge of the main body 11a, the sheet thickness is preferable, and 1.5 times the sheet thickness is more preferable. On the other hand, as the upper limit of the above difference, four times the sheet thickness is preferable, and three times the sheet thickness is more preferable. If the above difference is less than the above lower limit, it may be difficult to sandwich the base end portion 21a between the side edges of the top surface portion 13a and the bent portion 13b. On the contrary, if the above difference exceeds the above upper limit, the connecting flap 13 and the widening portion 21b may interfere with each other, making it difficult to bend the connecting flap 13 to the base end portion 21a side.

The lower limit of the length L3 of the slit 13c is preferably 3 times the sheet thickness, and more preferably 5 times the sheet thickness. On the other hand, the upper limit of the length L3 of the slit 13c is preferably 15 times the sheet thickness, and more preferably 10 times the sheet thickness. If the length L3 does not meet the lower limit, it may be difficult to sandwich the base end portion 21a between the side edges of the top surface portion 13a and the bent portion 13b. On the contrary, if the length L3 exceeds the upper limit, it may be difficult to reliably sandwich the base end portion 21a between the side edges of the top surface portion 13a and the bent portion 13b.

(Folded flap)
The folded flap 14 extends from the upper edge of the main body 11a and is folded back toward the inner surface side of the main body 11a in the assembled state as shown in FIGS. 2 and 3. The folded flap 14 is configured to be able to press the article housed in the box 2 from the side by the reaction force of the sheet. By providing the folded flap 14 on the box sheet 1, the article housed in the box 2 can be pressed from the side, the wobbling of the article in the box 2 can be suppressed, and the article can be held. It can be stably held in the box body 2.

As shown in FIG. 1, the folded flap 14 surrounds the projecting piece 11b. Specifically, the folded flap 14 and the projecting piece 11b are separated by a cutting line, and the cutting edges of both are opposed to each other with the cutting line in between. In the box sheet 1, since the folded flap 14 surrounds the projecting piece 11b, the wobbling of the article housed in the box 2 in the box 2 can be more reliably suppressed, and the folded flap 14 can be used. Unintentional damage to the projectile 11b can be suppressed.

The folded flap 14 extends from the entire area of the upper edge of the main body 11a except for the portion connected to the projecting piece 11b. As a result, the folded flap 14 is arranged in the box body 2 over both ends of the length surface. In the box sheet 1, the folded flaps 14 are arranged in the box body 2 over both ends of the length surface, so that the wobbling of the articles housed in the box body 2 in the box body 2 is more reliable. Can be suppressed.

The folded flap 14 is provided continuously with the bent portion 13b. Specifically, the folded flap 14 has a notch on the side edge continuous with the side edge of the main body 11a, and the bent portion 13b is arranged in the notched portion.

The folded flap 14 and the bent portion 13b are separably connected by a breakable line 22. That is, the pair of folded flaps 14 and the pair of connecting flaps 13 are separably connected to each other at the side edges. In other words, the box sheet 1 is integrally formed with a pair of folded flaps 14 and a pair of connecting flaps 13 in a connected state by the breakable line 22. The box sheet 1 is manufactured by being able to break the breakable line 22 corresponding to the assembly stage by connecting the folded flap 14 and the bent portion 13b so as to be separable by the breakable line 22. It is possible to prevent unintended contact of the bent portion 13b at the time of boxing. As a result, the box sheet 1 can suppress damage to the bent portion 13b during box making and troubles in the box making machine due to contact with the bent portion 13b.

(Outside flap)
The pair of outer bottom flaps 15 are formed in a rectangular shape and substantially the same shape. The width of the bottom outer flap 15 is substantially equal to the left-right length of the first side panel 11. The extension direction length of the bottom outer flap 15 is approximately 1/2 of the left-right length of the second side surface panel 12.

(Flap in the bottom)
The pair of bottom flaps 16 are formed in a rectangular shape and substantially the same shape. The width of the bottom flap 16 is substantially equal to the lateral length of the second side panel 12. The extension direction length of the bottom inner flap 16 is substantially equal to the extension direction length of the bottom outer flap 15.

<Advantage>
In the box sheet 1, the connecting flap 13 extending from the upper edge of the second side surface panel 12 is between the main body 11a and the widening portion 21b of the first side surface panel 11 at the boundary between the top surface portion 13a and the bent portion 13b. The contents can be supported from above by the top surface portion 13a, and other boxes can be stacked on the top surface portion 13a to form a tray-shaped box body 2. The box sheet 1 is formed by assembling a pair of first side panel 11 and second side panel 12 into a square cylinder to form a box body 2, and is used for box making for type A (so-called orange box type). Boxes can be manufactured inexpensively using a machine.

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

For example, the box sheet may not be provided with the above-mentioned folded flap extending from the upper edge of the main body. However, by providing the folded flap, the box sheet can stably hold the contents inside the box without adjusting the size of the contents accurately with respect to the size of the box. ..

Even if the box sheet includes a folded flap, the folded flap does not necessarily have to surround the above-mentioned projecting piece.

Even if the box sheet is provided with a folded flap, the folded flap and the bent portion may not be separably connected by a breakable line.

The connecting flap does not have to have a slit for separating the tip portions of the top surface portion and the bent portion. For example, an easy-to-bend line may be formed at the boundary line between the tip portions of the top surface portion and the bent portion.

As described above, the box sheet according to the present invention can be assembled in a tray shape, and the box making cost can be suppressed.

1 Box sheet 2 Box body 11 1st side panel 11a Main body 11b Projection piece 12 2nd side panel 13 Connection flap 13a Top surface 13b Bent 13c Slit 13d Easy-to-fold line 14 Folded flap 15 Bottom outer flap 16 Bottom inner flap 17 Glue margin 21a Base end 21b Widening part 21c Lower edge 21d Side edge 22 Easy-to-break line X Sealing tape

Claims (6)

A pair of first side panels and a pair of second side panels that are alternately connected from one side to the other in the left-right direction and assembled into a square cylinder.
It has a pair of connecting flaps that extend from the upper edge of the pair of second side panels and fold inward.
It can be assembled into a box shape in which an upper opening is formed between the pair of connecting flaps.
The first side panel has a substantially rectangular body and a protrusion protruding from a part of the upper edge of the body.
The projecting piece has a proximal end portion continuous from the upper edge of the main body and a widening portion continuous upward from the proximal end portion.
The connecting flap has a top surface portion that is bridged between the upper edges of the pair of first side panel panels in the assembled state and a bent portion that extends from the side edge of the top surface portion.
A box sheet in which the connecting flap can be locked between the main body and the widening portion at the boundary portion between the top surface portion and the bent portion. The box sheet according to claim 1, further comprising a folded flap that extends from the upper edge of the main body and is folded back to the inner surface side of the main body in the assembled state. The box sheet according to claim 2, wherein the folded flap surrounds the projecting piece. The box sheet according to claim 2 or 3, wherein the folded flap and the bent portion are separably connected by an easy-to-break line. Any one of claims 1 to 4, wherein the connecting flap has a slit for separating the tip portions of the top surface portion and the bent portion, and the base end portion is configured to be fitted in the slit. The box sheet according to item 1. The box sheet according to any one of claims 1 to 5, which does not have an easily bendable line at the boundary between the main body and the projecting piece.

Images