JP3235868U - Box sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assemble a box body which can be easily sealed only by a lid flap and can easily maintain a sealed state even if four lid flaps are folded in either clockwise or counterclockwise order. Provide a box sheet.
SOLUTION: Box sheets are alternately connected in the left-right direction and assembled into a square cylinder, a pair of first side panel 1 and a pair of second side panels 2, and an upper edge of a first side panel 1. A first lid flap 3 extending from, a pair of second lid flaps 4 extending from the upper edge of the pair of second side panel 2, and a third extending from the upper edge of the other first side panel 1. A lid flap 5 is provided. Further, a pair of lock structures 6 for engaging two adjacent lid flaps in an assembled state are composed of a pressed portion 62 of the first lid flap 3 and a holding portion 64 of the pair of second lid flaps 4. ..
[Selection diagram] Fig. 1

Description

The present invention relates to a box sheet.

Boxes assembled from corrugated cardboard sheets and the like are widely used for storing and transporting articles. As a method of sealing the lid of such a box body, four lid flaps are folded in order clockwise or counterclockwise, and the end of the last folded lid flap is the first folded lid flap. It may be sealed by combining it in a swastika shape by sneaking under the end of the. According to this method, it is possible to construct a lid portion that suppresses opening only by the lid flap without using a sealing tape or the like.

In order to easily construct such a swastika-shaped lid flap, the end of the last bent lid flap has a mechanism (lock structure) that makes it easy to slip under the end of the first bent lid flap. In many cases, it is provided (see, for example, Japanese Patent Application Laid-Open No. 2021-14285).

However, in the box body provided with such a lock structure, the lid flap to be bent first and the lid flap to be bent last are specified, so that the direction in which the lid flap is bent is inevitably specified. For this reason, there is a possibility that the workability of forming the lid portion may be deteriorated due to, for example, a difference in the dominant arm of the worker, or a redoing due to bending in the direction opposite to the specified direction.

On the other hand, there has been proposed a box body that can form a lid portion that suppresses opening only by the lid flap without specifying the direction in which the lid flap is bent (Actual Kaihei 2-66414).

Japanese Patent Laid-Open No. 2021-14285 Jikkenhei 2-66414 Gazette

In the above box, the first lid flap to the fourth lid flap are connected to the upper edges of four continuous side panels, respectively, and small locking protrusions are attached to both ends of the free end edges where the second lid flaps abut. Are connected. In this box, the first lid flap, the second lid flap, the third lid flap, and the fourth lid flap are folded in this order, and the leftmost projecting piece of the second lid flap is placed on the fourth lid flap. When the second lid flap is slightly lifted and replaced, the fourth lid flap is pressed by this protrusion and each lid flap is locked to obtain a sealed state. In the above-mentioned box body, the closed state can be obtained in the same manner even if the lid flap is rotated in the opposite direction, that is, the first lid flap, the fourth lid flap, the third lid flap, and the second lid flap are bent in this order.

However, in the above-mentioned box body, it is necessary to replace the locking projectile only by slightly lifting the second lid flap so that the locking projectile is on the fourth lid flap, and the size of the locking projectile is limited. .. Therefore, it is difficult to sufficiently press the fourth flap, it is difficult to maintain the sealed state, and there is a possibility that the fourth flap will be easily opened by a light impact during transportation or the like.

The present invention has been made in view of such circumstances, and even if the four lid flaps are folded in either clockwise or counterclockwise order, the box can be easily sealed only by the lid flaps. Moreover, it is an object to provide a box sheet that can be assembled into a box body that can be easily maintained in a sealed state.

The box sheet according to one aspect of the present invention is on a pair of first side panel and a pair of second side panels and 1 above the first side panel, which are alternately connected in the left-right direction and assembled in a square cylinder shape. A first lid flap extending from the edge, a pair of second lid flaps extending from the upper edge of the pair of second side panels, and a third lid extending from the other upper edge of the first side panel. A box sheet that is provided with flaps and can be assembled into a box body, and a pair of lock structures that engage two adjacent lid flaps in the assembled state is a pair of the first lid flap and the pair of the second lids. One each is provided between the flaps, and the lock structure is formed by providing a first notch in which the upper end of one of the lid flaps on the adjacent side is cut out in a square shape, and the first base end portion and the above. It is formed by providing a second notch that is adjacent to the left and right directions of the first notch and is cut out in a triangular shape including a part of the side edge of the first notch and a part of the upper edge of the one lid flap on two sides. A pressed portion, a second base end portion formed by providing a third notch in which the upper end of the other lid flap on the adjacent side is cut out in a square shape, and a second base end portion formed adjacent to the third notch in the left-right direction. It has a holding portion, and in the assembled state, the first base end portion is located above the second base end portion, and the pressed portion is engaged and adjacent so as to be located below the holding portion. The opening of the two lid flaps is suppressed, and the pair of first base end portions and pressed portions or the pair of second base end portions and holding portions constituting the pair of lock structures are both the above-mentioned first base end portions and holding portions. It is formed on one lid flap.

The box sheet of the present invention is a box that can be easily sealed with only the lid flaps even if the four lid flaps are folded in either clockwise or counterclockwise order, and the sealed state is easily maintained. The body can be assembled.

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 obtained by assembling the box sheet of FIG. 1. FIG. 3 is a schematic perspective view for explaining the first stage of the lid assembly process. FIG. 4 is a schematic perspective view for explaining the next step of FIG. FIG. 5 is a schematic perspective view showing a case where the lid flap is folded in the opposite direction to that of FIG.

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

The box sheet according to one aspect of the present invention is on a pair of first side panel and a pair of second side panels and 1 above the first side panel, which are alternately connected in the left-right direction and assembled in a square cylinder shape. A first lid flap extending from the edge, a pair of second lid flaps extending from the upper edge of the pair of second side panels, and a third lid extending from the other upper edge of the first side panel. A box sheet that is provided with flaps and can be assembled into a box body, and a pair of lock structures that engage two adjacent lid flaps in the assembled state is a pair of the first lid flap and the pair of the second lids. One each is provided between the flaps, and the lock structure is formed by providing a first notch in which the upper end of one of the lid flaps on the adjacent side is cut out in a square shape, and the first base end portion and the above. It is formed by providing a second notch that is adjacent to the left and right directions of the first notch and is cut out in a triangular shape including a part of the side edge of the first notch and a part of the upper edge of the one lid flap on two sides. A pressed portion, a second base end portion formed by providing a third notch in which the upper end of the other lid flap on the adjacent side is cut out in a square shape, and a second base end portion formed adjacent to the third notch in the left-right direction. It has a holding portion, and in the assembled state, the first base end portion is located above the second base end portion, and the pressed portion is engaged and adjacent so as to be located below the holding portion. The opening of the two lid flaps is suppressed, and the pair of first base end portions and pressed portions or the pair of second base end portions and holding portions constituting the pair of lock structures are both the above-mentioned first base end portions and holding portions. It is formed on one lid flap.

Since the box sheet is provided with a pair of lock structures for engaging two adjacent lid flaps, one for each of the first lid flap and the pair of the second lid flaps. The box body formed by assembling the box sheet can be easily sealed only by the lid flaps even if the four lid flaps are folded in either clockwise or counterclockwise order. In addition, the lock structure of the box sheet is adjacent so that the first base end portion is located above the second base end portion and the pressed portion is located below the holding portion in the assembled state. Since the opening of the two lid flaps is suppressed, the sealed state is easily maintained.

The first side panel may be a length panel. By using the first side panel provided with a pair of lock structures as the length surface panel, it is possible to prevent the strength of the first side panel from being lowered.

The length of the first base end portion in the extension direction is equal to the length of the second base end portion in the extension direction, and the lengths of the first base end portion and the second base end portion in the extension direction are equal. It is preferable that the length is smaller than the length of the first base end portion in the left-right direction and larger than the length of the second base end portion in the left-right direction. By making each part have such a dimensional relationship, it is easier to maintain the sealed state.

It is preferable that the length of the side of the pressed portion adjacent to the first notch is 15 mm or more and 25 mm or less. By setting the length of the side of the pressed portion adjacent to the first notch within the above range in this way, the pressed portion holds the pressed portion in a state where the two adjacent lid flaps are engaged with each other. It is easy to be fixed to the bottom of the part. Therefore, it is easier to maintain the sealed state.

In the assembled state, diagonally cut corner edges are formed at the tip corners on both sides in the width direction of the third lid flap and at the tip corners on the side adjacent to the third lid flap of the pair of second lid flaps. It is good to be there. By forming the corner drop edge in this way, it is possible to prevent the lid flap from being rolled up or interfering with the lid flap in the sealed state.

In the present invention, the "left-right direction" means the horizontal direction in the assumed general usage mode of the box body formed by assembling the box sheet, and the "upper" and "lower" are assumed. Although it means up and down in a general usage mode, it is not intended to limit the orientation of the box body when it is used. Further, "inside" and "outside" refer to the inside and the outside of the box body, respectively.

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

The box sheets shown in FIG. 1 are connected alternately in the left-right direction (x direction in FIG. 1), and are assembled into a square cylinder shape by a pair of first side panel 1, a pair of second side panels 2, and a first. 1 Above the first lid flap 3 extending from the upper edge of the side panel 1, the pair of second lid flaps 4 extending from the upper edge of the pair of second side panels 2, and the other first side panel 1. It is a box sheet that is provided with a third lid flap 5 extending from the edge and can be assembled into the box body 10 as shown in FIG. Further, in the box sheet, a pair of lock structures 6 for engaging two adjacent lid flaps in an assembled state are provided between the first lid flap 3 and the pair of second lid flaps 4, respectively. It is provided. In FIG. 1, a thick solid line indicates a cutting line obtained by cutting a sheet material, and a thin solid line indicates a ruled line formed by pressing a line on the sheet material.

In the box sheet, the first side surface panel 1 is a length surface panel, and the second side surface panel 2 is a width surface panel. By using the first side panel 1 provided with a pair of lock structures 6 as the length surface panel, it is possible to prevent the strength of the first side panel 1 from being lowered.

Further, the box sheet has a pair of outer bottom flaps 7 extending from the lower edge of the pair of first side surface panels 1 and a pair of inner bottom flaps 8 extending from the lower edge of the pair of second side surface panels 2. And the glue margin portion 9.

The box sheet is formed from a single sheet material. As the sheet material, for example, a corrugated cardboard sheet, a plastic board, a cardboard, or the like can be used. Of these, corrugated cardboard sheets are preferably used. Hereinafter, the case where the box sheet is made of a corrugated cardboard sheet will be described as an example, but it is not intended that the sheet material is limited to the corrugated cardboard sheet.

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

The lower limit of the thickness of the sheet material is preferably 3 mm from the viewpoint of strength. On the other hand, the upper limit of the thickness of the sheet material is not particularly limited, but is preferably 8 mm from the viewpoint of ease of assembly into the box body 10.

<1st side panel and 2nd side panel>
The first side surface panel 1 and the second side surface panel 2 have a substantially rectangular shape. Further, the pair of first side panel 1 has the same size, and the pair of second side panels 2 have the same size.

The vertical length of the first side panel 1 (the length in the y direction in FIG. 1) is equal to the vertical length of the second side panel 2. Further, the length in the left-right direction of the first side surface panel 1 (the length in the x direction in FIG. 1) is equal to or longer than the length in the left-right direction of the second side surface panel 2.

The vertical length of the first side panel 1 and the second side panel 2, the horizontal length of the first side panel 1, and the horizontal length of the second side panel 2 are assembled by the box sheet. It is appropriately determined so as to correspond to the size and number of the contained items expected to be accommodated in the box body 10.

<1st lid flap to 3rd lid flap and lock structure>
As shown in FIG. 2, the first lid flap 3 to the third lid flap 5 of the box body 10 are bent inward at right angles to the extending first side panel 1 and the second side panel 2, respectively. It is configured so that the lid portion 11 can be formed.

The first lid flap 3 is formed by providing a first notch 6a in which the upper end of the first lid flap 3 adjacent to the second lid flap 4, that is, both upper ends are cut out in a rectangular shape from the rectangular panel. The base end portion 61 and a part of the side edge of the first notch 6a and a part of the upper edge of the first lid flap 3 adjacent to each other in the left-right direction of the first notch 6a are cut out in a triangular shape including a part of the two sides. It has a pressed portion 62 formed by providing two notches 6b. The second notch 6b is preferably an isosceles right triangle. By forming the second notch 6b into a right-angled isosceles triangle, it is possible to easily push the pressed portion 62 below the pressing portion 64, which will be described later.

The pair of second lid flaps 4 is a second unit formed by providing a third notch 6c in which the upper end of the second lid flap 4 adjacent to the first lid flap 3 is cut out in a square shape from a square panel. It has an end portion 63 and a holding portion 64 formed adjacent to the third notch 6c in the left-right direction.

The third lid flap 5 has a substantially rectangular shape.

As shown in FIG. 1, the box sheet has tip corners on both sides in the width direction of the third lid flap 5 and tip angles on the side adjacent to the third lid flap 5 of the pair of second lid flaps 4 in the assembled state. It is preferable that a corner drop edge cut diagonally is formed in the portion. By forming the corner drop edge in this way, it is possible to prevent the lid flap from being rolled up or interfering with the lid flap in the sealed state.

The length of the first lid flap 3 and the third lid flap 5 in the extending direction (the length in the y direction of FIG. 1) is, for example, ½ of the length of the second side panel 2 in the left-right direction. Assuming that the length of the first lid flap 3 and the third lid flap 5 in the extending direction is ½ of the length of the second side panel 2 in the left-right direction as described above, as shown in FIG. 2, in the assembled state, The lid portion 11 can be closed by abutting the tip edges of the first lid flap 3 and the third lid flap 5 with each other.

On the other hand, the length of the pair of second lid flaps 4 in the extending direction is not particularly limited, but can be the same as the length of the first lid flap 3.

The length of the first lid flap 3 to the third lid flap 5 in the left-right direction (the length in the x direction in FIG. 1) is not particularly limited, but the first side panel 1 and the second side panel extending respectively are not limited. It is preferable that the length is the same as the length in the left-right direction of 2.

The lock structure 6 has the first base end portion 61, the pressed portion 62, the second base end portion 63, and the holding portion 64 described above. The pair of first base end portions 61 and the pressed portions 62 constituting the pair of lock structures 6 are both formed on the first lid flap 3. The second base end portion 63 and the pressing portion 64 are formed on the second lid flap 4. It is preferable that the corresponding configurations of the pair of lock structures 6 have the same dimensions. Even if the four lid flaps are folded in either the clockwise or counterclockwise order, the same workability can be obtained.

As shown in FIG. 2, the lock structure 6 is engaged so that the first base end portion 61 is located above the second base end portion 63 and the pressed portion 62 is located below the holding portion 64 in the assembled state. At the same time, the opening of the adjacent first lid flap 3 and second lid flap 4 is suppressed. In forming the lid portion 11, only one of the lock structures 6 of the pair of lock structures 6 is engaged as described above, and the other lock structure 6 is used in a non-engaged state (FIG. FIG. 2).

The length of the first base end portion 61 in the extension direction is equal to the length of the second base end portion 63 in the extension direction. The lengths of the first base end portion 61 and the second base end portion 63 in the extension direction (length H1 in FIG. 1) are the same for both the first lid flap 3 and the second lid flap 4 in the extension direction. In that case, it should be approximately 1/2 of that. The length H1 of the first base end portion 61 and the second base end portion 63 in the extending direction is set to be approximately ½ of the length of the first lid flap 3 and the second lid flap 4 in the extending direction. It is possible to make it easier to maintain the box state.

Further, the length H1 is abbreviated as a left-right length of the first base end portion 61 (length T1 in FIG. 1) and a left-right length of the second base end portion 63 (length T2 in FIG. 1). Equal, but more specifically, the length of the first base end portion 61 in the extension direction and the length H1 of the second base end portion 63 in the extension direction are the length T1 of the first base end portion 61 in the left-right direction. It is preferable that it is smaller and larger than the length T2 in the left-right direction of the second base end portion 63. By making each part have such a dimensional relationship, it is easier to maintain the sealed state.

The lower limit of the difference between the length T1 and the length H1 and the difference between the length T2 and the length H1 is preferably 1 mm, more preferably 2 mm. On the other hand, as the upper limit of the above difference, 4 mm is preferable, and 3 mm is more preferable. If the above difference is less than the above lower limit, the effect of maintaining the sealed state may be insufficient. On the contrary, if the difference exceeds the upper limit, it may be difficult to fit the pressed portion 62 below the pressing portion 64.

The lower limit of the length of the side of the pressed portion 62 adjacent to the first notch 6a (length H2 in FIG. 1) is preferably 15 mm, more preferably 17 mm. On the other hand, the upper limit of the length H2 is preferably 25 mm, more preferably 23 mm. If the length H2 is less than the lower limit, the pressed portion 62 is difficult to be fixed below the pressing portion 64, and the sealed state may not be maintained. On the contrary, if the length H2 exceeds the upper limit, it may be difficult to fit the pressed portion 62 below the pressing portion 64.

The lower limit of the ratio of the length H2 to the extension direction length of the first lid flap 3 is preferably 0.05, more preferably 0.10. On the other hand, as the upper limit of the ratio of the length H2, 0.2 is preferable, and 0.15 is more preferable. If the ratio of the length H2 is less than the lower limit, the pressed portion 62 is difficult to be fixed below the pressing portion 64, and the sealed state may not be maintained. On the contrary, if the ratio of the length H2 exceeds the upper limit, it may be difficult to fit the pressed portion 62 below the pressing portion 64.

<Outer bottom flap and inner bottom flap>
The pair of outer bottom flaps 7 and the pair of inner bottom flaps 8 have a substantially rectangular shape, and in the assembled state, the tip edges of the pair of outer bottom flaps 7 are butted against each other, and the pair of outer bottom flaps 7 and the pair of second flaps 7 are abutted against each other. It is configured so that it can be sealed by attaching a sealing tape to the outer surface of the side panel 2. Specifically, at the time of assembly, the pair of outer bottom flaps 7 and the pair of inner bottom flaps 8 are extended with respect to the first side panel 1 and the second side panel 2 so as to extend the inner bottom flaps 8 so as to be inside. It can be bent inward at a right angle and a sealing tape can be attached to the outer surface to form the bottom portion 12 of the box body 10.

The length of each bottom outer flap 7 in the extending direction (length in the y direction in FIG. 1) is, for example, ½ of the length in the left-right direction of the second side surface panel 2.

On the other hand, the length of the bottom inner flap 8 in the extending direction is not particularly limited, but can be the same as the length of the bottom outer flap 7.

The length of the bottom outer flap 7 and the bottom inner flap 8 in the left-right direction (the length in the x direction in FIG. 1) is not particularly limited, but the extending first side panel 1 and the second side panel 2, respectively. It is preferable that the length is the same as the length in the left-right direction.

<Glue allowance>
The glue margin portion 9 is provided at the side end of a strip-shaped body composed of a pair of first side surface panels 1 and a pair of second side surface panels 2 alternately connected in the left-right direction. In the box sheet of FIG. 1, the glue margin portion 9 is provided on the first side surface panel 1. The glue margin portion 9 is configured to be able to come into contact with the other side end of the strip-shaped body. By attaching this contact portion to the other side end of the band-shaped body, the pair of first side surface panels 1 and the pair of second side surface panels 2 can be made endless. Alternatively, it may be bonded by wire bonding or the like instead of sticking.

The glue margin portion 9 may be rectangular, but is preferably trapezoidal. Specifically, the glue margin portion 9 may have an isosceles trapezoidal shape in which the pair of side sides thereof incline inward as the distance from the strip-shaped body increases. By forming the glue margin portion 9 into an isosceles trapezoidal shape in this way, when the box sheet is assembled into the box body 10, the glue is maintained while maintaining the adhesive strength near the side edge of the glue margin portion 9. It is possible to prevent the side edge of the substitute portion 9 from interfering with the second lid flap 4, the third lid flap 5, and the in-bottom flap 8.

<How to assemble the box>
The method of assembling the box body for assembling the box sheet into the box body 10 includes a square tubular portion assembling step, a bottom assembling step, and a lid assembling step.

(Square cylinder assembly process)
In the square tubular portion assembly step, a pair of first side panel 1 and a pair of second side panel 2 that are alternately connected in the left-right direction are assembled into a square cylinder.

Specifically, the procedure is as follows. First, of the pair of first side panel 1 and the pair of second side panels 2 that are alternately connected in the left-right direction, the first side panel 1 located at one side end (left side in FIG. 1) is adjacent to the first side panel 1. The second side surface panel 2 is folded on the inner surface side of the second side surface panel 2, and the second side surface panel 2 located at the other side end (right side in FIG. 1) is folded on the inner surface side of the adjacent first side surface panel 1. Then, the glue margin portion 9 is attached to the inner surface of the second side surface panel 2 on the other side in the left-right direction (the side opposite to the side connected to the first side surface panel 1). As a result, the pair of first side panel 1 and the pair of second side panels 2 are connected in an endless manner. The box sheet is provided to the user (user of the box body 10) in this state. The adhesive margin portion 9 can be attached to the second side surface panel 2 by using, for example, an adhesive, a stapler, or the like.

Next, the pair of first side panel 1 and the pair of second side panels 2 connected endlessly are spread out in a square cylinder shape. As a result, the side surface of the box body 10 is assembled into a square cylinder.

(Bottom assembly process)
In the bottom assembly step, the bottom 12 of the box body 10 is assembled by a pair of inner flaps 8 and a pair of outer flaps 7.

Specifically, the procedure is as follows. First, the pair of bottom flaps 8 are bent inside the square cylindrical box body so as to be perpendicular to the second side surface panel 2. Next, the pair of bottom outer flaps 7 are bent so as to be in contact with the outer surface thereof so as to be perpendicular to the first side surface panel 1. Since the pair of bottom outer flaps 7 are configured so that the tip edges can be butted against each other, the bottom portion 12 is formed by attaching a sealing tape to the butted portion and the outer surface of the pair of second side surface panels 2. To.

(Cover assembly process)
In the lid assembly step, the lid portion 11 of the box body 10 is assembled by the first lid flap 3, the pair of second lid flaps 4, and the third lid flap 5. This step is performed after the object to be packed is housed in the space surrounded by the bottom portion 12 and the square tubular portion. Since the box body 10 formed by assembling the box sheet is characterized by the lid assembly process, it will be described in detail with reference to the drawings.

First, as shown in FIG. 3, the second lid flap 4 located to the left of the first lid flap 3 is placed inside the square cylindrical box body so as to be perpendicular to the second side panel 2. Bend. Next, the third lid flap 5 is bent inside the square cylindrical box body so as to be perpendicular to the first side panel 1. As a result, the third lid flap 5 overlaps the previously bent second lid flap 4. Further, the second lid flap 4 located to the right of the first lid flap 3 is similarly bent and overlapped above the third lid flap 5.

Further, when the first lid flap 3 is bent in the same manner, as shown in FIG. 4, the first lid flap 3 overlaps above the pair of second lid flaps 4. In this state, when the pressed portion 62 above the second lid flap 4 on the left side that is first bent is pushed downward, the hypotenuse of the pressed portion 62 slides downward on the surface of the pressing portion 64, and the pressing portion 64 It passes through the apex of and moves to the lower part of the holding portion 64. When the pressed portion 62 and the pressing portion 64 are returned to the state before being pushed in this state, the pressed portion 62 is below the pressing portion 64 while the first base end portion 61 is located above the second base end portion 63. It is meshed so as to be located at, and as shown in FIG. 2, it suppresses the opening of two adjacent lid flaps.

The above description is a case where the four lid flaps are folded clockwise to assemble the lid portion 11, but the lid portion 11 can also be assembled by folding the four lid flaps counterclockwise. In this case, first the second lid flap 4 located on the right side of the first lid flap 3 is bent, then the third lid flap 5, the second lid flap 4 located on the left side of the first lid flap 3, and the second lid flap 4. 1 Bend the lid flaps 3 in this order. In this state, by pushing the pressed portion 62 above the second lid flap 4 on the right side, which is first bent, below the pressing portion 64, the lid portion 11 can be assembled as shown in FIG.

Since the box sheet is provided with a pair of lock structures 6 for engaging two adjacent lid flaps, one for each of the first lid flap 3 and the pair of second lid flaps 4. The box body 10 formed by assembling the box sheet can be easily sealed only by the lid flaps even if the four lid flaps are folded in either clockwise or counterclockwise order. Further, in the lock structure 6 of the box sheet, the first base end portion 61 is located above the second base end portion 63 and the pressed portion 62 is located below the holding portion 64 in the assembled state. Since the two adjacent lid flaps are prevented from being opened by engaging with each other, the sealed state is easily maintained.

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

In the above embodiment, the case where the first side surface panel is the length surface panel and the second side surface panel is the width surface panel has been described, but the first side surface panel is the width surface panel and the second side surface panel is the length surface panel. It may be a panel. In this case, the pair of outer bottom flaps extend from the lower edge of the pair of second side panels, and the pair of inner flaps extend from the lower edge of the pair of first side panels.

According to FIG. 1 of the above embodiment, the first lid flap extends from the upper edge of the first side panel having no glue margin, but the first lid flap has the first side panel having the glue margin. It may extend from the upper edge. Further, the second side panel may be configured to have a glue margin portion, and in this case, the first lid flap may extend from the upper edge of any first side panel.

In the above embodiment, the case where the pair of the first base end portion and the pressed portion constituting the pair of lock structures are both formed on the first lid flap has been described, but the pair of the second base end portions and the holding portion are described. May be configured so that both are formed on the first lid flap. In this case, the first base end portion and the pressed portion are each formed on the second lid flap.

In the above embodiment, the case where the number of bottom flaps forming the bottom of the box sheet is four has been described, but the number of bottom flaps is not limited as long as the bottom can be formed, and the specific configuration is also limited. is not it. For example, the bottom may be formed by one bottom flap extending from the lower edge of one length surface panel. In this case, the recesses and the like contribute only to the ease of opening the lid.

As described above, the box sheet of the present invention can be easily sealed with only the lid flaps even if the lid flaps of the present invention are folded in either clockwise or counterclockwise order, and the boxed state is in a sealed state. It is possible to assemble a box that is easy to maintain.

1 1st side panel 2 2nd side panel 3 1st lid flap 4 2nd lid flap 5 3rd lid flap 6 Lock structure 6a 1st notch 6b 2nd notch 6c 3rd notch 61 1st base end 62 Pressed part 63 2nd base end 64 Pressing part 7 Outer bottom flap 8 In-bottom flap 9 Glue allowance part 10 Box body 11 Cover part 12 Bottom part H1, H2, T1, T2 Length

Claims (5)

A pair of first side panel and a pair of second side panels that are connected alternately in the left-right direction and assembled in a square cylinder.
The first lid flap extending from the upper edge of the first side panel of No. 1 and
A pair of second lid flaps extending from the upper edge of the pair of the second side panel,
A box sheet that can be assembled into a box body, including a third lid flap that extends from the upper edge of the first side panel.
A pair of lock structures for engaging two adjacent lid flaps in the assembled state are provided between the first lid flap and the pair of second lid flaps, one for each.
The above lock structure
A first base end portion formed by providing a first notch in which the upper end on the adjacent side of one lid flap is cut out in a square shape, and a first base end portion.
Formed by providing a second notch that is adjacent to the left and right direction of the first notch and is cut out in a triangular shape including a part of the side edge of the first notch and a part of the upper edge of the one lid flap on two sides. The pressed part to be pressed and
A second base end formed by providing a third notch in which the upper end of the other lid flap on the adjacent side is cut out in a square shape, and
It has a holding portion formed adjacent to the third notch in the left-right direction, and has a holding portion.
In the assembled state, the first base end portion is located above the second base end portion, and the pressed portion is engaged so as to be located below the holding portion, and two adjacent lid flaps are opened. Is to deter
A box sheet in which the pair of first base end portions and pressed portions or the pair of second base end portions and pressing portions constituting the pair of lock structures are both formed on the first lid flap. The box sheet according to claim 1, wherein the first side panel is a length surface panel. The length of the first base end portion in the extension direction is equal to the length of the second base end portion in the extension direction.
Claims that the length of the first base end portion and the second base end portion in the extending direction is smaller than the length of the first base end portion in the left-right direction and larger than the length of the second base end portion in the left-right direction. The box sheet according to claim 1 or claim 2. The box sheet according to claim 1, claim 2 or claim 3, wherein the length of the side of the pressed portion adjacent to the first notch is 15 mm or more and 25 mm or less. In the assembled state, diagonally cut corner edges are formed at the tip corners on both sides in the width direction of the third lid flap and at the tip corners on the side adjacent to the third lid flap of the pair of second lid flaps. The box sheet according to any one of claims 1 to 4.

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