JP6034528B1

JP6034528B1 - Box sheet

Info

Publication number: JP6034528B1
Application number: JP2016099003A
Authority: JP
Inventors: 勝彦寺岡
Original assignee: Daio Package Co Ltd
Current assignee: Daio Package Co Ltd
Priority date: 2016-05-17
Filing date: 2016-05-17
Publication date: 2016-11-30
Anticipated expiration: 2036-05-17
Also published as: JP2017206278A

Abstract

【課題】積み重ね作業の作業効率の低下を抑えつつ、複数の箱の荷崩れを十分に抑制することができる箱用シートの提供を目的とする。【解決手段】本発明の箱用シートは、左右方向に連接される４つの側面パネル、この４つの側面パネルの上縁から延出する４つの上フラップ及びこの４つの側面パネルの下縁から延出する４つの下フラップを備え、連接方向一端側の側面パネル及び連接方向他端側の側面パネルが連結して四角筒状部を形成することで箱型に組立可能な箱用シートであって、組立状態で対向する一対の上記側面パネルとこの側面パネルから延出する上フラップ及び下フラップとの境界にそれぞれ折り曲げ容易線が形成されており、各折り曲げ容易線が、一端から他端に亘り波状に形成されている。上記側面パネルと上フラップとの境界に形成される折り曲げ容易線及びこの側面パネルと下フラップとの境界に形成される折り曲げ容易線の波形状がそれぞれ等しいとよい。【選択図】図１An object of the present invention is to provide a box sheet that can sufficiently suppress the collapse of a plurality of boxes while suppressing a decrease in work efficiency of stacking work. The box sheet of the present invention includes four side panels connected in the left-right direction, four upper flaps extending from the upper edges of the four side panels, and the lower edges of the four side panels. A box sheet that includes four lower flaps that are connected, and that can be assembled into a box shape by connecting a side panel on one end side in the connecting direction and a side panel on the other end side in the connecting direction to form a rectangular tubular portion. An easy folding line is formed at the boundary between the pair of side panels facing each other in the assembled state and an upper flap and a lower flap extending from the side panel, and each easy folding line extends from one end to the other. It is formed in a wave shape. It is preferable that the foldable line formed at the boundary between the side panel and the upper flap and the wave shape of the foldable line formed at the boundary between the side panel and the lower flap are the same. [Selection] Figure 1

Description

本発明は、箱用シートに関する。 The present invention relates to a box sheet.

１枚の段ボールシートからなり、一対の長辺側面パネルと一対の端辺側面パネルとで形成される四角筒状部の上下開口を、短辺側面パネルの上縁及び下縁から延出され、内向きに折り曲げられる内フラップと、長辺側面パネルの上縁及び下縁から延出され、内フラップの外側に折り重ねられて先端側が互いに突き合わされる外フラップとで封止する包装箱が広く用いられている。 The upper and lower openings of the rectangular cylindrical portion formed by one cardboard sheet and formed by a pair of long side panels and a pair of end side panels are extended from the upper and lower edges of the short side panels, There is a wide packaging box that is sealed with an inner flap that is bent inward and an outer flap that extends from the upper and lower edges of the long side panel and is folded outside the inner flap and the leading ends abut against each other. It is used.

この包装箱は、例えば商品収容箱として用いられ、商品の陳列や商品の保管等のために段積みして使用されることがある。しかしながら、この包装箱は、包装箱同士が滑り易いと、少しの衝撃によって崩れるおそれがある。 This packaging box is used as, for example, a product storage box, and may be used in a stacked manner for display of products or storage of products. However, this packaging box may collapse due to a slight impact if the packaging boxes are slippery.

そのため、今日では、端辺側面パネルに連続する上側内フラップの一部分を切り離して係合片を形成し、この係合片を外フラップの上側に折り重ねて配置すると共に、下側外フラップの側端に上記係合片が嵌合する切欠きを形成した包装箱が提案されている（実開昭５５−１１０４２１号公報、特開２０１１−１４３９６６号公報参照）。 Therefore, today, a part of the upper inner flap continuous with the end side panel is cut off to form an engagement piece, and this engagement piece is folded over the outer flap and arranged on the side of the lower outer flap. There has been proposed a packaging box in which a notch into which the engagement piece is fitted is formed at the end (see Japanese Utility Model Laid-Open Nos. 55-110421 and 2011-143966).

上記公報に記載の包装箱は、１つの包装箱の係合片を他の包装箱の切欠きに嵌合させることで複数の包装箱を比較的安定的に積み重ねることができるよう構成されており、これにより積み重ねられた複数の包装箱の荷崩れを一定程度抑制することができるとされている。 The packaging box described in the above publication is configured such that a plurality of packaging boxes can be stacked relatively stably by fitting the engaging pieces of one packaging box into the notches of the other packaging box. Thus, it is said that the collapse of a plurality of stacked packaging boxes can be suppressed to a certain extent.

しかしながら、上記公報に記載の構成によると、１つの包装箱の係合片を他の包装箱の切欠きに正確に嵌合させないと荷崩れ抑制効果を得ることができない。これに対し、一般に包装箱の積み重ね作業は短時間で素早く行われることが多いため、１つの包装箱の係合片が他の包装箱の切欠きに嵌合しない状態で複数の包装箱が積み重ねられるおそれが高い。このように、上記公報に記載の包装箱によっては、作業効率の低下を抑えることと、複数の包装箱の荷崩れを十分に抑制することとを共に実現することは困難である。 However, according to the configuration described in the above publication, the load collapse suppression effect cannot be obtained unless the engagement pieces of one packaging box are accurately fitted to the notches of the other packaging boxes. On the other hand, generally, stacking operations of packaging boxes are often performed quickly in a short time, so that a plurality of packaging boxes are stacked in a state where the engaging pieces of one packaging box do not fit into the notches of the other packaging box. There is a high risk of being As described above, depending on the packaging box described in the above publication, it is difficult to achieve both the reduction in work efficiency and the sufficient suppression of the collapse of a plurality of packaging boxes.

実開昭５５−１１０４２１号公報Japanese Utility Model Publication No. 55-110421 特開２０１１−１４３９６６号公報JP 2011-143966 A

本発明は、このような事情に鑑みてなされたものであり、積み重ね作業の作業効率の低下を抑えつつ、複数の箱の荷崩れを十分に抑制することができる箱用シートの提供を目的とするものである。 The present invention has been made in view of such circumstances, and an object thereof is to provide a box sheet that can sufficiently suppress the collapse of a plurality of boxes while suppressing a decrease in work efficiency of stacking work. To do.

上記課題を解決するためになされた本発明に係る箱用シートは、左右方向に連接される４つの側面パネル、この４つの側面パネルの上縁から延出する４つの上フラップ及びこの４つの側面パネルの下縁から延出する４つの下フラップを備え、連接方向一端側の側面パネル及び連接方向他端側の側面パネルが連結して四角筒状部を形成することで箱型に組立可能な箱用シートであって、組立状態で対向する一対の上記側面パネルとこの側面パネルから延出する上フラップ及び下フラップとの境界にそれぞれ折り曲げ容易線が形成されており、各折り曲げ容易線が、一端から他端に亘り波状に形成されている。 The box seat according to the present invention, which has been made to solve the above problems, includes four side panels connected in the left-right direction, four upper flaps extending from the upper edges of the four side panels, and the four side faces. It has four lower flaps that extend from the lower edge of the panel, and can be assembled into a box shape by connecting the side panel at one end in the connecting direction and the side panel at the other end in the connecting direction to form a rectangular tubular portion. It is a sheet for a box, and an easy folding line is formed at each boundary between the pair of side panels opposed to each other in an assembled state and an upper flap and a lower flap extending from the side panel, and each easy folding line is It is formed in a wave shape from one end to the other end.

当該箱用シートは、組立状態で対向する一対の側面パネルとこの側面パネルから延出する上フラップ及び下フラップとの境界に形成される折り曲げ容易線が一端から他端に亘り波状に形成されているので、組立状態でこの一対の側面パネルの上縁及び下縁が上下方向に湾曲した波状に形成される。これにより、当該箱用シートを組み立ててなる箱の天面及び底面には、この折り曲げ容易線に起因して一対の側面パネルの左右方向に凸部と凹部とが連続するうねりが形成される。そのため、当該箱用シートを組み立ててなる複数の箱を積み重ねると、下側の箱の天面に形成される凹凸と上側の箱の底面に形成される凹凸とが干渉してこの一対の側面パネルの左右方向への横ずれが抑制される。これにより、当該箱用シートを組み立ててなる複数の箱は、積み重ね状態において安定的に保持され、荷崩れを十分に抑制することができる。また、当該箱用シートを組み立ててなる箱にあっては、下側の箱の天面に形成される凹部の底点と上側の箱の底面に形成される凸部の頂点、及び下側の箱の天面に形成される凸部の頂点と上側の箱の底面に形成される凹部の底点とを厳密に位置合わせしなくても、凸部及び凹部の干渉により箱の横ずれを十分に抑制することができるので、積み重ね作業の作業効率の低下を抑えることができる。 In the box sheet, an easy-to-bend line formed at a boundary between a pair of side panels facing each other in an assembled state and an upper flap and a lower flap extending from the side panel is formed in a wave shape from one end to the other end. Therefore, in the assembled state, the upper edge and the lower edge of the pair of side panels are formed in a wave shape curved in the vertical direction. Thereby, on the top and bottom surfaces of the box formed by assembling the box sheet, undulations in which the convex portions and the concave portions are continuous in the left-right direction of the pair of side panels are formed due to the easy folding line. Therefore, when a plurality of boxes formed by assembling the box sheets are stacked, the unevenness formed on the top surface of the lower box interferes with the unevenness formed on the bottom surface of the upper box. Is prevented from laterally shifting in the left-right direction. Thereby, the several box formed by assembling the said box sheet | seat is stably hold | maintained in the stacked state, and can fully suppress collapse of a load. In addition, in the box formed by assembling the box sheet, the bottom point of the concave portion formed on the top surface of the lower box, the apex of the convex portion formed on the bottom surface of the upper box, and the lower side Even if the apex of the convex part formed on the top surface of the box and the bottom point of the concave part formed on the bottom surface of the upper box are not strictly aligned, the lateral displacement of the box is sufficiently caused by the interference between the convex part and the concave part. Since it can suppress, the fall of the work efficiency of stacking work can be suppressed.

上記側面パネルと上フラップとの境界に形成される折り曲げ容易線及びこの側面パネルと下フラップとの境界に形成される折り曲げ容易線の波形状がそれぞれ等しいとよい。このように、上記側面パネルと上フラップとの境界に形成される折り曲げ容易線及びこの側面パネルと下フラップとの境界に形成される折り曲げ容易線の波形状がそれぞれ等しいことによって、組立状態において下側の箱の天面に形成される凸部と上側の箱の底面に形成される凹部、及び下側の箱の天面に形成される凹部と上側の箱の底面に形成される凸部とが上下方向に対向するので、これらの凸部及び凹部を容易かつ確実に係合することができ、これにより積み重ね作業性及び積み重ねられた場合における安定性を向上することができる。 It is preferable that the foldable line formed at the boundary between the side panel and the upper flap and the wave shape of the foldable line formed at the boundary between the side panel and the lower flap are the same. As described above, the easy folding line formed at the boundary between the side panel and the upper flap and the wave shape of the folding easy line formed at the boundary between the side panel and the lower flap are equal to each other. A convex portion formed on the top surface of the side box, a concave portion formed on the bottom surface of the upper box, a concave portion formed on the top surface of the lower box, and a convex portion formed on the bottom surface of the upper box. Since these are opposed to each other in the vertical direction, these convex portions and concave portions can be easily and reliably engaged, thereby improving stacking workability and stability when stacked.

展開状態において上記一対の側面パネルと一対の上フラップとの境界に形成される一対の折り曲げ容易線の波形状が等しく、上記一対の側面パネルと一対の下フラップとの境界に形成される一対の折り曲げ容易線の波形状が等しいとよい。このように、展開状態において上記一対の側面パネルと一対の上フラップとの境界に形成される一対の折り曲げ容易線の波形状が等しく、上記一対の側面パネルと一対の下フラップとの境界に形成される一対の折り曲げ容易線の波形状が等しい場合、組立状態において対向する一対の側面パネルの波形状が左右逆になる。これにより、組立状態における一方の側面パネルの谷部の対向位置に他方の側面パネルの山部が形成され、一方の側面パネルの山部の対向位置に他方の側面パネルの谷部が形成される。その結果、当該箱用シートを組み立ててなる複数の箱を積み重ねた場合、これらの箱は凸部と凹部とが干渉することで一対の側面パネルの対向方向にも横ずれし難くなる。従って、上記構成によれば、当該箱用シートを組み立ててなる複数の箱の積み重ね状態における安定性をさらに向上することができる。 In a deployed state, the pair of easy-to-bend lines formed at the boundary between the pair of side panels and the pair of upper flaps have the same wave shape, and a pair of pairs formed at the boundary between the pair of side panels and the pair of lower flaps. It is desirable that the wave shapes of the folding easy lines are equal. In this way, in the unfolded state, the corrugations of the pair of easy-to-bend fold lines formed at the boundary between the pair of side panels and the pair of upper flaps are equal and formed at the boundary between the pair of side panels and the pair of lower flaps. When the wave shapes of the pair of easy folding lines are equal, the wave shapes of the pair of side panels facing each other in the assembled state are reversed. Thereby, a crest of the other side panel is formed at a position opposite to the trough of one side panel in the assembled state, and a trough of the other side panel is formed at a position opposite to the crest of the one side panel. . As a result, when a plurality of boxes formed by assembling the box sheets are stacked, these boxes are not easily displaced laterally in the opposing direction of the pair of side panels due to the interference between the convex portions and the concave portions. Therefore, according to the said structure, the stability in the stacking state of the several box which assembles the said sheet | seat for boxes can further be improved.

上記各折り曲げ容易線が、側面パネルの左右方向の中央を基準として一方側に１つの山部を有し、他方側に１つの谷部を有するとよい。このように、上記各折り曲げ容易線が、側面パネルの左右方向の中央を基準として一方側に１つの山部を有し、他方側に１つの谷部を有することによって、この山部の高さ及び谷部の深さを比較的大きくすることができる。そのため、当該箱用シートを組み立ててなる複数の箱を積み重ねた場合に、下側の箱の天面に形成される凸部と上側の箱の底面に形成される凹部とを係合し、かつ下側の箱の天面に形成される凹部と上側の箱の底面に形成される凸部とを係合し易く、これにより積み重ね状態における安定性を全面的に向上することができる。 Each easy-to-bend line preferably has one peak on one side and one valley on the other side with respect to the center in the left-right direction of the side panel. As described above, each of the easy folding lines has one peak on one side and one valley on the other side with respect to the center in the left-right direction of the side panel. And the depth of a trough part can be made comparatively large. Therefore, when a plurality of boxes formed by assembling the box sheets are stacked, the convex portion formed on the top surface of the lower box and the concave portion formed on the bottom surface of the upper box are engaged, and The concave portion formed on the top surface of the lower box and the convex portion formed on the bottom surface of the upper box can be easily engaged, whereby the stability in the stacked state can be entirely improved.

上記一対の側面パネルが長辺側面パネルであるとよい。このように、上記一対の側面パネルが長辺側面パネルである場合、この一対の長辺側面パネルの上縁から延出する一対の上フラップが折り曲げられることで天面が形成され、この一対の長辺側面パネルの下縁から延出する一対の下フラップが折り曲げられることで底面が形成される（つまり、上記一対の上フラップ及び一対の下フラップが箱の外面を構成する）ので、当該箱用シートを組み立ててなる箱の天面及び底面に容易かつ確実にうねりを形成することができる。 The pair of side panels may be long side panels. Thus, when the pair of side panels are long side panels, a pair of upper flaps extending from the upper edges of the pair of long side panels are folded to form a top surface. The bottom is formed by bending a pair of lower flaps extending from the lower edge of the long side panel (that is, the pair of upper flaps and the pair of lower flaps constitute the outer surface of the box). Waviness can be easily and reliably formed on the top and bottom surfaces of the box formed by assembling the sheet.

なお、本発明において「上」及び「下」とは、当該箱用シートを箱型に組み立てた状態での「上」及び「下」を意味する。また、「左右」とは、当該箱用シートを箱型に組み立てた状態での「左右」を意味する。「山部」とは、折り曲げ容易線の両端を結ぶ仮想直線よりも外側（側面パネルと上フラップとの境界に形成される折り曲げ容易線においては上側、側面パネルと下フラップとの境界に形成される折り曲げ容易線においては下側）に突出した凸状部分をいい、「谷部」とは、折り曲げ容易線の両端を結ぶ仮想直線よりも内側（側面パネルと上フラップとの境界に形成される折り曲げ容易線においては下側、側面パネルと下フラップとの境界に形成される折り曲げ容易線においては上側）に窪んだ凹状部分をいう。 In the present invention, “upper” and “lower” mean “upper” and “lower” in a state where the box sheet is assembled in a box shape. “Left and right” means “left and right” in a state where the box sheet is assembled in a box shape. The “mountain portion” is outside the imaginary straight line connecting both ends of the foldable line (in the foldable line formed at the boundary between the side panel and the upper flap, it is formed at the boundary between the upper side panel and the lower flap. This is a convex part that protrudes downward on the easy-to-bend line, and the “valley” is formed on the inner side of the imaginary straight line connecting both ends of the easy-to-bend line (at the boundary between the side panel and the upper flap). It refers to a concave portion that is depressed on the lower side in the easy-to-bend line and on the upper side in the easy-to-bend line formed at the boundary between the side panel and the lower flap.

以上説明したように、本発明に係る箱用シートは、積み重ね作業の作業効率の低下を抑えつつ、複数の箱の荷崩れを十分に抑制することができる。 As described above, the box sheet according to the present invention can sufficiently suppress the collapse of a plurality of boxes while suppressing a decrease in the work efficiency of the stacking operation.

本発明の一実施形態に係る箱用シートを示す模式的平面図である。It is a typical top view showing the sheet for boxes concerning one embodiment of the present invention. 図１の箱用シートを組み立ててなる箱を示す模式的斜視図である。It is a typical perspective view which shows the box formed by assembling the sheet | seat for boxes of FIG. 図１の箱用シートを組み立ててなる箱を示す模式的側面図である。It is a typical side view which shows the box formed by assembling the sheet | seat for boxes of FIG. 図３の箱を２つ積み重ねた状態を示す模式的側面図である。It is a typical side view which shows the state which piled up the two boxes of FIG. 図４の箱のＡ−Ａ線端面図である。It is an AA line end view of the box of FIG. 図４の箱のＢ−Ｂ線端面図である。It is a BB line end view of the box of FIG.

以下、適宜図面を参照しつつ、本発明の実施の形態を詳説する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

＜箱用シート＞
図１の箱用シートは、１枚の段ボールシートからなる。当該箱用シートは、左右方向に連接される４つの側面パネル（第１側面パネル１、第２側面パネル２、第３側面パネル３及び第４側面パネル４）と、この４つの側面パネル１〜４の上縁から延出する４つの上フラップ５〜８と、この４つの側面パネル１〜４の下縁から延出する４つの下フラップ９〜１２とを備える。また、当該箱用シートは、第１側面パネル１の連接方向一端側に連接される糊代部１３を備える。当該箱用シートは、連接方向一端側の第１側面パネル１及び連接方向他端側の第４側面パネル４が連結して四角筒状部を形成することで箱型に組立可能に構成されている。 <Box sheet>
The box sheet in FIG. 1 is composed of one cardboard sheet. The box sheet includes four side panels (first side panel 1, second side panel 2, third side panel 3, and fourth side panel 4) connected in the left-right direction, Four upper flaps 5 to 8 extending from the upper edge of the four and four lower flaps 9 to 12 extending from the lower edge of the four side panels 1 to 4 are provided. Further, the box sheet includes an adhesive margin 13 connected to one end side of the first side panel 1 in the connecting direction. The box sheet is configured so that it can be assembled into a box shape by connecting the first side panel 1 on one end side in the connecting direction and the fourth side panel 4 on the other end side in the connecting direction to form a rectangular tubular portion. Yes.

当該箱用シートに用いられる段ボールシートとしては、原紙を波形状に形成した中芯をライナーに貼り合わせたものであって、例えば波形状に形成された中芯を１枚のライナーに貼り合わせた片面段ボールシート、片面段ボールシートの段頂にさらにライナーを貼り合わせた両面段ボールシート、両面段ボールシートの片側に片面段ボールシートの段頂を貼り合わせた複両面段ボールシート、複両面段ボールシートの片側に片面段ボールシートの段頂をさらに貼り合わせた複々両面段ボールシート等が挙げられる。これらの中でも、加工性、経済性、耐久性等の点から両面段ボールシートが好ましい。 The corrugated cardboard sheet used for the box sheet is obtained by pasting a core formed of a base paper into a wave shape to a liner. For example, the core formed in a wave shape is pasted on a single liner. Single-sided corrugated sheet, double-sided corrugated sheet with a liner attached to the top of a single-sided corrugated sheet, double-sided corrugated sheet with a single-sided corrugated sheet sheet laminated on one side of a double-sided corrugated sheet, single-sided on one side of a double-sided cardboard sheet A double-sided corrugated cardboard sheet in which the tops of corrugated cardboard sheets are further bonded together is exemplified. Among these, double-sided cardboard sheets are preferable from the viewpoint of processability, economy, durability, and the like.

第１側面パネル１乃至第４側面パネル４は各々略方形状に形成されている。第１側面パネル１乃至第４側面パネル４は各々上下方向長さが略等しい。また、第１側面パネル１及び第３側面パネル３は、組立状態で対向するよう左右方向長さが略等しく、第２側面パネル２及び第４側面パネル４は、組立状態で対向するよう左右方向長さが略等しい。さらに、第１側面パネル１及び第３側面パネル３は長辺側面パネルとして構成されており、第２側面パネル２及び第４側面パネル４は短辺側面パネルとして構成されている（つまり、第１側面パネル１及び第３側面パネル３の左右方向長さは第２側面パネル２及び第４側面パネル４の左右方向長さよりも大きい）。 The first side panel 1 to the fourth side panel 4 are each formed in a substantially rectangular shape. The first side panel 1 to the fourth side panel 4 have substantially the same vertical length. The first side panel 1 and the third side panel 3 are substantially equal in length in the left-right direction so as to face each other in the assembled state, and the second side panel 2 and the fourth side panel 4 are arranged in the left-right direction so as to face each other in the assembled state. The length is approximately equal. Further, the first side panel 1 and the third side panel 3 are configured as long side panels, and the second side panel 2 and the fourth side panel 4 are configured as short side panels (that is, the first side panel 1). The lateral lengths of the side panel 1 and the third lateral panel 3 are larger than the lateral lengths of the second lateral panel 2 and the fourth lateral panel 4).

第１側面パネル１乃至第４側面パネル４の上下方向長さの下限としては、３ｃｍが好ましく、５ｃｍがより好ましい。一方、第１側面パネル１乃至第４側面パネル４の上下方向長さの上限としては、５０ｃｍが好ましく、２０ｃｍがより好ましい。第１側面パネル１乃至第４側面パネル４の上下方向長さが上記下限に満たないと、当該箱用シートを組み立ててなる箱に収容できる物品が限定されるおそれがある。逆に、第１側面パネル１乃至第４側面パネル４の上下方向長さが上記上限を超えると、包装箱のサイズが大きくなり過ぎて取扱性が低下するおそれがある。 The lower limit of the vertical length of the first side panel 1 to the fourth side panel 4 is preferably 3 cm, and more preferably 5 cm. On the other hand, the upper limit of the vertical length of the first side panel 1 to the fourth side panel 4 is preferably 50 cm, and more preferably 20 cm. If the vertical length of the first side panel 1 to the fourth side panel 4 is less than the lower limit, articles that can be accommodated in a box formed by assembling the box sheet may be limited. On the contrary, when the vertical length of the first side panel 1 to the fourth side panel 4 exceeds the upper limit, the size of the packaging box becomes too large and the handling property may be lowered.

第１側面パネル１及び第３側面パネル３の左右方向長さの下限としては、１０ｃｍが好ましく、２０ｃｍがより好ましい。一方、第１側面パネル１及び第３側面パネル３の左右方向長さの上限としては、１００ｃｍが好ましく、５０ｃｍがより好ましい。第１側面パネル１及び第３側面パネル３の左右方向長さが上記下限に満たないと、当該箱用シートを組み立ててなる箱に収容できる物品が限定されるおそれがある。逆に、第１側面パネル１及び第３側面パネル３の左右方向長さが上記上限を超えると、包装箱のサイズが大きくなり過ぎて取扱性が低下するおそれがある。 As a minimum of the length in the left-right direction of the 1st side panel 1 and the 3rd side panel 3, 10 cm is preferred and 20 cm is more preferred. On the other hand, as an upper limit of the left-right direction length of the 1st side panel 1 and the 3rd side panel 3, 100 cm is preferable and 50 cm is more preferable. If the left and right lengths of the first side panel 1 and the third side panel 3 are less than the lower limit, articles that can be accommodated in a box formed by assembling the box sheet may be limited. On the contrary, if the left and right lengths of the first side panel 1 and the third side panel 3 exceed the above upper limit, the size of the packaging box becomes too large, and the handleability may be reduced.

第２側面パネル２及び第４側面パネル４の左右方向長さの下限としては、５ｃｍが好ましく、１０ｃｍがより好ましい。一方、第２側面パネル２及び第４側面パネル４の左右方向長さの上限としては、５０ｃｍが好ましく、３０ｃｍがより好ましい。第２側面パネル２及び第４側面パネル４の左右方向長さが上記下限に満たないと、当該箱用シートを組み立ててなる箱に収容できる物品が限定されるおそれがある。逆に、第２側面パネル２及び第４側面パネル４の左右方向長さが上記上限を超えると、包装箱のサイズが大きくなり過ぎて取扱性が低下するおそれがある。 The lower limit of the length in the left-right direction of the second side panel 2 and the fourth side panel 4 is preferably 5 cm, and more preferably 10 cm. On the other hand, as an upper limit of the left-right direction length of the 2nd side panel 2 and the 4th side panel 4, 50 cm is preferable and 30 cm is more preferable. If the left-right direction length of the 2nd side panel 2 and the 4th side panel 4 is less than the said minimum, there exists a possibility that the articles | goods which can be accommodated in the box formed by assembling the said sheet | seat for boxes are limited. On the other hand, if the left and right lengths of the second side panel 2 and the fourth side panel 4 exceed the upper limit, the size of the packaging box becomes too large, and the handleability may be reduced.

組立状態で対向する第１側面パネル１及び第３側面パネル３と第１側面パネル１及び第３側面パネル３から延出する一対の上フラップ（上側外フラップ）５，７との境界には一対の折り曲げ容易線１４，１５が形成されている。また、第１側面パネル１及び第３側面パネル３と第１側面パネル１及び第３側面パネル３から延出する一対の下フラップ（下側外フラップ）９，１１との境界には一対の折り曲げ容易線１６，１７が形成されている。各折り曲げ容易線１４〜１７は、一端から他端に亘り波状に形成されている。 A pair is provided at the boundary between the first side panel 1 and the third side panel 3 and the pair of upper flaps (upper outer flaps) 5 and 7 extending from the first side panel 1 and the third side panel 3 that face each other in the assembled state. The folding easy lines 14 and 15 are formed. In addition, a pair of bent portions are formed at the boundary between the first side panel 1 and the third side panel 3 and the pair of lower flaps (lower outer flaps) 9 and 11 extending from the first side panel 1 and the third side panel 3. Easy lines 16 and 17 are formed. Each of the easy folding lines 14 to 17 is formed in a wave shape from one end to the other end.

以下、当該箱用シートの組立状態を示す図２〜図６を参照して、折り曲げ容易線１４〜１７について詳述する。 Hereinafter, the folding easy lines 14 to 17 will be described in detail with reference to FIGS. 2 to 6 showing the assembled state of the box sheet.

折り曲げ容易線１４〜１７について説明するに当たり、まず当該箱用シートの組立手順について説明する。当該箱用シートの組立手順としては、まず第１側面パネル１を第２側面パネル２の内面に折り重ね、続いて第４側面パネル４を第３側面パネル３の内面に折り重ね、糊代部１３を第４側面パネル４の内面に貼着する。これにより、第１側面パネル１の連接方向の一端側の端縁及び第４側面パネル４の連接方向の他端側の端縁が連結され、第１側面パネル１乃至第４側面パネル４によって四角筒状部が形成される。次に、第２側面パネル２及び第４側面パネル４の下縁から延出する一対の下フラップ（下側内フラップ）１０，１２を内側に折り曲げ、続いて第１側面パネル１及び第３側面パネル３の下縁から延出する一対の下フラップ（下側外フラップ）９，１１を内側に折り曲げてこの一対の下フラップ９，１１の先端同士を突き合わせることで底面部を形成する。さらに、第２側面パネル２及び第４側面パネル４の上縁から延出する一対の上フラップ（上側内フラップ）６，８を内側に折り曲げ、続いて第１側面パネル１及び第３側面パネル３の上縁から延出する一対の上フラップ（上側外フラップ）５，７を内側に折り曲げてこの一対の上フラップ５，７の先端同士を突き合わせることで天面部を形成する。これにより、当該箱用シートが箱型に組み立てられる。なお、当該箱用シートは、箱型に組み立てられたうえ、一対の上フラップ５，７の突き合わせ部、及び一対の下フラップ９，１１の突き合わせ部の外側を封函テープＸで貼り付けることで図２〜図６の箱２１，２１ａ，２１ｂに形成される。 In describing the folding easy lines 14 to 17, first, an assembly procedure of the box sheet will be described. As an assembling procedure of the box sheet, first, the first side panel 1 is folded on the inner surface of the second side panel 2, and then the fourth side panel 4 is folded on the inner surface of the third side panel 3. 13 is attached to the inner surface of the fourth side panel 4. As a result, the end edge on one end side in the connecting direction of the first side panel 1 and the end edge on the other end side in the connecting direction of the fourth side panel 4 are connected, and the first side panel 1 to the fourth side panel 4 form a square. A cylindrical part is formed. Next, a pair of lower flaps (lower inner flaps) 10 and 12 extending from the lower edges of the second side panel 2 and the fourth side panel 4 are folded inward, followed by the first side panel 1 and the third side surface. A pair of lower flaps (lower outer flaps) 9 and 11 extending from the lower edge of the panel 3 are bent inward, and the ends of the pair of lower flaps 9 and 11 are brought into contact with each other to form a bottom surface portion. Further, a pair of upper flaps (upper inner flaps) 6 and 8 extending from the upper edges of the second side panel 2 and the fourth side panel 4 are bent inward, and then the first side panel 1 and the third side panel 3 are bent. A top surface portion is formed by bending a pair of upper flaps (upper outer flaps) 5 and 7 extending inward from the upper edges and abutting the tips of the pair of upper flaps 5 and 7 together. Thereby, the box sheet is assembled into a box shape. The box sheet is assembled in a box shape, and the outside of the abutting portions of the pair of upper flaps 5 and 7 and the abutting portions of the pair of lower flaps 9 and 11 is attached by a sealing tape X. Formed in the boxes 21, 21a, 21b of FIGS.

折り曲げ容易線１４〜１７は、上述のように第１側面パネル１及び第３側面パネル３と一対の上フラップ５，７との境界、並びに第１側面パネル１及び第３側面パネル３と一対の下フラップ９，１１との境界に形成されている。つまり、折り曲げ容易線１４〜１７は、一対の長辺側面パネルと一対の上フラップ５，７との境界、並びに一対の長辺側面パネルと一対の下フラップ９，１１との境界に形成されている。当該箱用シートは、一対の長辺側面パネル（第１側面パネル１及び第３側面パネル３）の上縁から延出する一対の上フラップ５，７が折り曲げられることで天面が形成され、この一対の長辺側面パネルの下縁から延出する一対の下フラップ９，１１が折り曲げられることで底面が形成される（つまり、一対の上フラップ５，７及び一対の下フラップ９，１１が箱２１の外面を構成する）ので、図２に示すように、箱２１の天面及び底面に凸部２４及び凹部２５を有するうねりを容易かつ確実に形成することができる。 As described above, the folding easy lines 14 to 17 include the boundary between the first side panel 1 and the third side panel 3 and the pair of upper flaps 5 and 7, and the pair of the first side panel 1 and the third side panel 3 with the pair. It is formed at the boundary with the lower flaps 9 and 11. That is, the folding easy lines 14 to 17 are formed at the boundary between the pair of long side surface panels and the pair of upper flaps 5 and 7 and at the boundary between the pair of long side surface panels and the pair of lower flaps 9 and 11. Yes. The box sheet has a top surface formed by bending a pair of upper flaps 5, 7 extending from the upper edges of the pair of long side panels (first side panel 1 and third side panel 3), A pair of lower flaps 9 and 11 extending from the lower edges of the pair of long side panels are bent to form a bottom surface (that is, the pair of upper flaps 5 and 7 and the pair of lower flaps 9 and 11 are 2 constitutes the outer surface of the box 21, and as shown in FIG. 2, undulations having the convex portions 24 and the concave portions 25 on the top and bottom surfaces of the box 21 can be easily and reliably formed.

折り曲げ容易線１４〜１７は、第１側面パネル１及び第３側面パネル３と一対の上フラップ５，７との境界、並びに第１側面パネル１及び第３側面パネル３と一対の下フラップ９，１１との境界の全部分に形成されている。また、折り曲げ容易線１４〜１７は、両端に亘って波状に形成されている（つまり、折り曲げ容易線１４〜１７は、波状部分以外の部分を有しない）。このように、折り曲げ容易線１４〜１７が両端に亘って波状に形成されていることにより、箱２１は、図３に示すように、第１側面パネル１及び第３側面パネル３の上縁及び下縁が両端に亘って山部２２及び谷部２３が連続した波状に形成される。折り曲げ容易線１４〜１７の波形状は、第１側面パネル１及び第３側面パネル３の左右方向中央を基準として左右非対称に形成されている。 The easy folding lines 14 to 17 include the boundary between the first side panel 1 and the third side panel 3 and the pair of upper flaps 5 and 7, and the first side panel 1 and the third side panel 3 and the pair of lower flaps 9, 11 is formed in the whole part of the boundary with 11. Moreover, the foldable lines 14 to 17 are formed in a wave shape across both ends (that is, the foldable lines 14 to 17 have no part other than the waved part). In this way, the folding easy lines 14 to 17 are formed in a wavy shape across the both ends, so that the box 21 has the upper edge of the first side panel 1 and the third side panel 3 and the third side panel 3 as shown in FIG. The lower edge is formed in a wave shape in which a peak portion 22 and a valley portion 23 are continuous across both ends. The wave shapes of the folding easy lines 14 to 17 are formed asymmetrically with respect to the center in the left-right direction of the first side panel 1 and the third side panel 3.

折り曲げ容易線１４〜１７の波形状としては、山部２２と谷部２３とが交互に連続した形状である限り特に限定されない。各折り曲げ容易線１４〜１７における各山部２２の幅（折り曲げ容易線１４〜１７の両端を結ぶ仮想直線上における左右方向長さ）及び各谷部２３の幅（折り曲げ容易線１４〜１７の両端を結ぶ仮想直線上における左右方向長さ）は等しいことが好ましい。また、各折り曲げ容易線１４〜１７における各山部２２の高さ（折り曲げ容易線１４〜１７の両端を結ぶ仮想直線を基準とする高さ）及び各谷部２３の深さ（折り曲げ容易線１４〜１７の両端を結ぶ仮想直線を基準とする深さ）は等しいことが好ましい。なお、各折り曲げ容易線１４〜１７は、上述のように山部２２と谷部２３とが交互に連続して設けられている限り、一部に直線部分等が設けられていてもよい（例えば山部２２と谷部２３との間に上記仮想直線と平行な直線部分が設けられていてもよい）。但し、複数の箱２１を積み重ねた場合にこれらの箱２１の荷崩れをより容易かつ確実に抑制する点からは、各折り曲げ容易線１４〜１７は、山部２２を形成する円弧と谷部２３を形成する円弧とが交互に連続した形状とされることが好ましい。なお、折り曲げ容易線１４〜１７の両端の高さ位置は等しいことが好ましい。 The wave shape of the easy bending lines 14 to 17 is not particularly limited as long as the ridges 22 and the valleys 23 are alternately continuous. The width of each peak portion 22 (the length in the left-right direction on the imaginary straight line connecting both ends of the easy folding lines 14 to 17) and the width of each valley portion 23 (both ends of the easy folding lines 14 to 17). The lengths in the left-right direction on a virtual straight line connecting the two are preferably equal. In addition, the height of each peak portion 22 in each easy-to-bend line 14 to 17 (height based on a virtual straight line connecting both ends of the easy-to-bend lines 14 to 17) and the depth of each valley portion 23 (the easy-to-bend line 14). It is preferable that the depth based on a virtual straight line connecting both ends of ˜17 is equal. In addition, as long as the peak part 22 and the trough part 23 are provided alternately continuously as mentioned above, each bendable line 14-17 may be provided with a linear part in one part (for example, A straight line portion parallel to the virtual straight line may be provided between the peak portion 22 and the valley portion 23). However, from the viewpoint of more easily and reliably suppressing the collapse of the loads of the boxes 21 when a plurality of boxes 21 are stacked, each of the folding easy lines 14 to 17 has an arc and a valley 23 that form the peak portion 22. It is preferable that the arcs forming the shape are alternately continuous. In addition, it is preferable that the height position of the both ends of the bending easy lines 14-17 is equal.

第１側面パネル１と上フラップ５との境界に形成される折り曲げ容易線１４及び第１側面パネル１と下フラップ９との境界に形成される折り曲げ容易線１６の波形状は等しいことが好ましい。また、第３側面パネル３と上フラップ７との境界に形成される折り曲げ容易線１５及び第３側面パネル３と下フラップ１１との境界に形成される折り曲げ容易線１７の波形状は等しいことが好ましい。このように、第１側面パネル１と上フラップ５及び下フラップ９との境界に形成される折り曲げ容易線１４，１６の波形状が等しく、第３側面パネル３と上フラップ７及び下フラップ１１との境界に形成される折り曲げ容易線１５，１７の波形状が等しいことによって、図４に示すように一対の箱２１ａ，２１ｂを棒積みした場合に、下側の箱２１ｂの天面に形成される凸部２４ｂと上側の箱２１ａの底面に形成される凹部２５ａ、及び下側の箱２１ｂの天面に形成される凹部２５ｂと上側の箱２１ａの底面に形成される凸部２４ａとが上下方向に対向するので、これらの凸部２４ａ，２４ｂ及び凹部２５ａ，２５ｂを容易かつ確実に係合することができ、これにより積み重ね作業性及び積み重ねられた場合における安定性を向上することができる。 It is preferable that the wave form of the easy folding line 14 formed at the boundary between the first side panel 1 and the upper flap 5 and the easy folding line 16 formed at the boundary between the first side panel 1 and the lower flap 9 are equal. In addition, the wave shapes of the easy folding line 15 formed at the boundary between the third side panel 3 and the upper flap 7 and the easy folding line 17 formed at the boundary between the third side panel 3 and the lower flap 11 are equal. preferable. Thus, the wave shapes of the fold easy lines 14 and 16 formed at the boundary between the first side panel 1 and the upper flap 5 and the lower flap 9 are equal, and the third side panel 3, the upper flap 7 and the lower flap 11 4 are formed on the top surface of the lower box 21b when the pair of boxes 21a and 21b are stacked as shown in FIG. The convex portion 24b and the concave portion 25a formed on the bottom surface of the upper box 21a, and the concave portion 25b formed on the top surface of the lower box 21b and the convex portion 24a formed on the bottom surface of the upper box 21a Since they face each other, the convex portions 24a and 24b and the concave portions 25a and 25b can be easily and reliably engaged, thereby improving stacking workability and stability when stacked. Kill.

展開状態において（つまり図１の箱用シートにおいて）、第１側面パネル１及び第３側面パネル３と一対の上フラップ５，７との境界に形成される一対の折り曲げ容易線１４，１５の波形状が等しく、第１側面パネル１及び第３側面パネル３と一対の下フラップ９，１１との境界に形成される一対の折り曲げ容易線１６，１７の波形状が等しいことが好ましい。これにより、第１側面パネル１及び第３側面パネル３の左右方向中央を基準とした波形状が左右非対称とされていることと相俟って、図３に示すように組立状態において第１側面パネル１及び第３側面パネル３の波形状が左右逆になる。このため、第１側面パネル１の谷部２３の対向位置に第３側面パネル３の山部２２が形成され、第１側面パネル１の山部２２の対向位置に第３側面パネル３の谷部２３が形成される。その結果、一対の箱２１ａ，２１ｂを棒積みした場合、図５，６に示すように、第１側面パネル１及び第３側面パネル３の対向方向において下側の箱２１ｂの天面に形成される凸部２４ｂと上側の箱２１ａの底面に形成される凹部２５ａ、及び下側の箱２１ｂの天面に形成される凹部２５ｂと上側の箱２１ａの底面に形成される凸部２４ａとがそれぞれ係合し、凸部２４ａ，２４ｂと凹部２５ａ，２５ｂとが干渉することで第１側面パネル１及び第３側面パネル３の対向方向にも横ずれし難くなる。従って、上記構成によれば、箱２１ａ，２１ｂが積み重ねられた場合における安定性をさらに向上することができる。 In the unfolded state (that is, in the box sheet of FIG. 1), the waves of the pair of easy folding lines 14 and 15 formed at the boundary between the first side panel 1 and the third side panel 3 and the pair of upper flaps 5 and 7. It is preferable that the shapes are equal, and the wave shapes of the pair of easy folding lines 16 and 17 formed at the boundary between the first side panel 1 and the third side panel 3 and the pair of lower flaps 9 and 11 are equal. Thereby, coupled with the fact that the wave shape with respect to the center in the left-right direction of the first side panel 1 and the third side panel 3 is left-right asymmetric, the first side surface in the assembled state as shown in FIG. The wave shapes of the panel 1 and the third side panel 3 are reversed left and right. For this reason, the peak part 22 of the 3rd side panel 3 is formed in the opposing position of the trough part 23 of the 1st side panel 1, and the trough part of the 3rd side panel 3 is formed in the opposing position of the peak part 22 of the 1st side panel 1. 23 is formed. As a result, when the pair of boxes 21a and 21b are stacked, they are formed on the top surface of the lower box 21b in the opposing direction of the first side panel 1 and the third side panel 3 as shown in FIGS. And a concave portion 25a formed on the bottom surface of the upper box 21a, and a concave portion 25b formed on the top surface of the lower box 21b and a convex portion 24a formed on the bottom surface of the upper box 21a, respectively. The protrusions 24a and 24b and the recesses 25a and 25b interfere with each other so that it is difficult for the first side panel 1 and the third side panel 3 to be laterally displaced. Therefore, according to the above configuration, the stability when the boxes 21a and 21b are stacked can be further improved.

各折り曲げ容易線１４〜１７は、第１側面パネル１及び第３側面パネル３の左右方向の中央を基準として一方側に１つの山部２２を有し、他方側に１つの谷部２３を有することが好ましい。このように、各折り曲げ容易線１４〜１７が第１側面パネル１及び第３側面パネル３の左右方向の中央を基準として一方側に１つの山部２２を有し、他方側に１つの谷部２３を有することによって、この山部２２の高さ及び谷部２３の深さを比較的大きくすることができる。つまり、各折り曲げ容易線１４〜１７が複数の山部２２及び複数の谷部２３を有する場合、山部２２の高さ及び谷部２３の深さを比較的大きくすると山部２２及び谷部２３の曲率が大きくなり各折り曲げ容易線１４〜１７を折り曲げ難くなるおそれがあるが、各折り曲げ容易線１４〜１７が１つの山部２２及び１つの谷部２３を有する場合、山部２２の高さ及び谷部２３の深さを大きくしつつ、山部２２及び谷部２３の曲率を小さくすることができるので各折り曲げ容易線１４〜１７を折り曲げ易い。そのため、図４に示すように、一対の箱２１ａ，２１ｂを積み重ねた場合、下側の箱２１ｂの天面に形成される凸部２４ｂと上側の箱２１ａの底面に形成される凹部２５ａとを係合し、かつ下側の箱２１ｂの天面に形成される凹部２５ｂと上側の箱２１ａの底面に形成される凸部２４ａとを係合し易く、これにより積み重ね状態における安定性を全面的に向上することができる。 Each of the easy folding lines 14 to 17 has one peak portion 22 on one side and one valley portion 23 on the other side with respect to the center in the left-right direction of the first side panel 1 and the third side panel 3. It is preferable. Thus, each fold easy line 14-17 has the one peak part 22 on one side on the basis of the center of the left-right direction of the 1st side panel 1 and the 3rd side panel 3, and one trough part on the other side. By having 23, the height of the peak portion 22 and the depth of the valley portion 23 can be made relatively large. That is, when each fold easy line 14-17 has the some peak part 22 and the some trough part 23, if the height of the peak part 22 and the depth of the trough part 23 are comparatively enlarged, the peak part 22 and the trough part 23 will be shown. However, when each of the easy folding lines 14 to 17 has one peak portion 22 and one trough portion 23, the height of the peak portion 22 may be increased. And the curvature of the peak part 22 and the trough part 23 can be made small, enlarging the depth of the trough part 23, Therefore It is easy to bend each folding easy lines 14-17. Therefore, as shown in FIG. 4, when a pair of boxes 21a and 21b are stacked, a convex portion 24b formed on the top surface of the lower box 21b and a concave portion 25a formed on the bottom surface of the upper box 21a. Engages and easily engages the concave portion 25b formed on the top surface of the lower box 21b and the convex portion 24a formed on the bottom surface of the upper box 21a, thereby improving the stability in the stacked state. Can be improved.

さらに、各折り曲げ容易線１４〜１７が１つの山部２２及び１つの谷部２３を有する場合、山部２２の頂点及び谷部２３の底点は、第１側面パネル１及び第３側面パネル３の左右方向の中央と両端との中間点に位置することが好ましい。さらに、各折り曲げ容易線１４〜１７は、各折り曲げ容易線１４〜１７の両端を結ぶ仮想直線の中央を基準として略点対称に形成されていることが好ましい。このような構成によれば、山部２２及び谷部２３による凹凸を比較的大きくしても各折り曲げ容易線１４〜１７の折り曲げが困難となり難い。 Furthermore, when each fold easy line 14-17 has the one peak part 22 and the one trough part 23, the vertex of the peak part 22 and the bottom point of the trough part 23 are the 1st side panel 1 and the 3rd side panel 3. It is preferable to be located at an intermediate point between the center in the left-right direction and both ends. Furthermore, it is preferable that each foldable line 14-17 is formed substantially point-symmetrically with respect to the center of an imaginary straight line connecting both ends of each foldable line 14-17. According to such a structure, even if the unevenness | corrugation by the peak part 22 and the trough part 23 is comparatively enlarged, it is difficult to bend each folding easy line 14-17.

山部２２の頂点の平均高さ（折り曲げ容易線１４〜１７の両端を結ぶ仮想直線を基準とする平均高さ）の下限としては、１ｍｍが好ましく、２ｍｍがより好ましい。一方、山部２２の頂点の平均高さの上限としては、１０ｍｍが好ましく、５ｍｍがより好ましい。山部２２の頂点の平均高さが上記下限に満たないと、箱２１ａ，２１ｂが積み重ねられた場合における横ずれの抑制効果が十分に向上しないおそれがある。逆に、山部２２の頂点の平均高さが上記上限を超えると、折り曲げ容易線１４〜１７を折り曲げ難くなると共に、当該箱用シートを組み立ててなる箱２１内における物品の安定性が不十分となるおそれがある。 The lower limit of the average height of the apex of the peak portion 22 (the average height based on the imaginary straight line connecting both ends of the folding easy lines 14 to 17) is preferably 1 mm, and more preferably 2 mm. On the other hand, the upper limit of the average height of the vertices of the peaks 22 is preferably 10 mm, and more preferably 5 mm. If the average height of the vertices of the peak portion 22 is less than the lower limit, the lateral shift suppression effect when the boxes 21a and 21b are stacked may not be sufficiently improved. On the contrary, when the average height of the apex of the peak portion 22 exceeds the above upper limit, it becomes difficult to bend the easy folding lines 14 to 17 and the stability of the article in the box 21 formed by assembling the box sheet is insufficient. There is a risk of becoming.

谷部２３の底点の平均深さ（折り曲げ容易線１４〜１７の両端を結ぶ仮想直線を基準とする平均深さ）の下限としては、１ｍｍが好ましく、２ｍｍがより好ましい。一方、谷部２３の底点の平均深さの上限としては、１０ｍｍが好ましく、５ｍｍがより好ましい。谷部２３の底点の平均深さが上記下限に満たないと、箱２１ａ，２１ｂが積み重ねられた場合における横ずれの抑制効果が十分に向上しないおそれがある。逆に、谷部２３の底点の平均深さが上記上限を超えると、折り曲げ容易線１４〜１７を折り曲げ難くなると共に、当該箱用シートを組み立ててなる箱２１内における物品の安定性が不十分となるおそれがある。なお、谷部２３の底点の平均深さは、山部２２の頂点の平均高さと等しいことが好ましい。 The lower limit of the average depth of the bottom of the valley 23 (the average depth based on the virtual straight line connecting both ends of the easy folding lines 14 to 17) is preferably 1 mm, and more preferably 2 mm. On the other hand, the upper limit of the average depth of the bottom of the valley 23 is preferably 10 mm and more preferably 5 mm. If the average depth of the bottom point of the valley portion 23 is less than the lower limit, there is a possibility that the lateral shift suppression effect when the boxes 21a and 21b are stacked is not sufficiently improved. On the contrary, if the average depth of the bottom point of the trough 23 exceeds the upper limit, it becomes difficult to bend the fold easy lines 14 to 17 and the stability of the article in the box 21 formed by assembling the box sheet is not good. May be sufficient. In addition, it is preferable that the average depth of the bottom of the valley part 23 is equal to the average height of the peak of the peak part 22.

山部２２及び谷部２３の平均幅（折り曲げ容易線１４〜１７の両端を結ぶ仮想直線上における平均幅）の下限としては、２．５ｃｍが好ましく、５ｃｍがより好ましい。一方、山部２２及び谷部２３の平均幅の上限としては、２５ｃｍが好ましく、１５ｃｍがより好ましい。山部２２及び谷部２３の平均幅が上記下限に満たないと、山部２２の高さ及び谷部２３の深さを十分に確保した場合に折り曲げ容易線１４〜１７を折り曲げ難くなるおそれがある。逆に、山部２２及び谷部２３の平均幅が上記上限を超えると、箱２１ａ，２１ｂが積み重ねられた場合における横ずれの抑制効果が十分に向上しないおそれがある。 The lower limit of the average width of the peak portion 22 and the valley portion 23 (average width on the imaginary straight line connecting both ends of the folding easy lines 14 to 17) is preferably 2.5 cm, and more preferably 5 cm. On the other hand, as an upper limit of the average width of the peak part 22 and the trough part 23, 25 cm is preferable and 15 cm is more preferable. If the average width of the peaks 22 and the valleys 23 is less than the above lower limit, the folding easy lines 14 to 17 may be difficult to bend when the height of the peaks 22 and the depth of the valleys 23 are sufficiently secured. is there. Conversely, if the average widths of the peaks 22 and valleys 23 exceed the above upper limit, the lateral slip suppression effect when the boxes 21a, 21b are stacked may not be sufficiently improved.

山部２２及び谷部２３の曲率半径の下限としては、８００ｍｍが好ましく、９００ｍｍがより好ましい。一方、山部２２及び谷部２３の曲率半径の上限としては、１１００ｍｍが好ましく、１０００ｍｍがより好ましい。山部２２及び谷部２３の曲率半径が上記下限に満たないと、折り曲げ容易線１４〜１７を折り曲げ難くなるおそれがある。逆に、山部２２及び谷部２３の曲率半径が上記上限を超えると、箱２１ａ，２１ｂが積み重ねられた場合における横ずれの抑制効果が十分に向上しないおそれがある。 As a minimum of the curvature radius of peak part 22 and trough part 23, 800 mm is preferred and 900 mm is more preferred. On the other hand, as an upper limit of the curvature radius of the peak part 22 and the trough part 23, 1100 mm is preferable and 1000 mm is more preferable. If the radii of curvature of the crests 22 and the troughs 23 are less than the above lower limit, the easy folding lines 14 to 17 may be difficult to bend. Conversely, if the radii of curvature of the peaks 22 and valleys 23 exceed the above upper limit, the lateral slip suppression effect when the boxes 21a, 21b are stacked may not be sufficiently improved.

第１側面パネル１及び第３側面パネル３の左右方向長さに対する山部２２の平均高さの比の下限としては、０．００１が好ましく、０．００５がより好ましい。一方、第１側面パネル１及び第３側面パネル３の左右方向長さに対する山部２２の平均高さの比の上限としては、０．０５が好ましく、０．０２がより好ましい。上記比が上記下限に満たないと、箱２１ａ，２１ｂが積み重ねられた場合における横ずれの抑制効果が十分に向上しないおそれがある。逆に、上記比が上記上限を超えると、折り曲げ容易線１４〜１７を折り曲げ難くなるおそれがある。 As a minimum of ratio of average height of peak part 22 to the horizontal direction length of the 1st side panel 1 and the 3rd side panel 3, 0.001 is preferred and 0.005 is more preferred. On the other hand, the upper limit of the ratio of the average height of the ridges 22 to the length in the left-right direction of the first side panel 1 and the third side panel 3 is preferably 0.05, and more preferably 0.02. If the ratio is less than the lower limit, there is a possibility that the lateral shift suppression effect when the boxes 21a and 21b are stacked is not sufficiently improved. On the other hand, if the ratio exceeds the upper limit, the easy folding lines 14 to 17 may be difficult to bend.

第１側面パネル１及び第３側面パネル３の左右方向長さに対する谷部２３の平均深さの比の下限としては、０．００１が好ましく、０．００５がより好ましい。一方、第１側面パネル１及び第３側面パネル３の左右方向長さに対する谷部２３の平均深さの比の上限としては、０．０５が好ましく、０．０２がより好ましい。上記比が上記下限に満たないと、箱２１ａ，２１ｂが積み重ねられた場合における横ずれの抑制効果が十分に向上しないおそれがある。逆に、上記比が上記上限を超えると、折り曲げ容易線１４〜１７を折り曲げ難くなるおそれがある。 The lower limit of the ratio of the average depth of the valleys 23 to the length in the left-right direction of the first side panel 1 and the third side panel 3 is preferably 0.001 and more preferably 0.005. On the other hand, the upper limit of the ratio of the average depth of the valleys 23 to the length in the left-right direction of the first side panel 1 and the third side panel 3 is preferably 0.05, and more preferably 0.02. If the ratio is less than the lower limit, there is a possibility that the lateral shift suppression effect when the boxes 21a and 21b are stacked is not sufficiently improved. On the other hand, if the ratio exceeds the upper limit, the easy folding lines 14 to 17 may be difficult to bend.

＜利点＞
当該箱用シートは、組立状態で対向する一対の側面パネル（第１側面パネル１及び第３側面パネル３）と第１側面パネル１及び第３側面パネル３から延出する上フラップ５，７及び下フラップ９，１１との境界に形成される折り曲げ容易線１４〜１７が一端から他端に亘り波状に形成されているので、組立状態で第１側面パネル１及び第３側面パネル３の上縁及び下縁が上下方向に湾曲した波状に形成される。これにより、当該箱用シートを組み立ててなる箱２１の天面及び底面には、この折り曲げ容易線１４〜１７に起因して第１側面パネル１及び第３側面パネル３の左右方向に凸部２４と凹部２５とが連続するうねりが形成される。そのため、当該箱用シートを組み立ててなる複数の箱２１ａ，２１ｂを積み重ねると、下側の箱２１ｂの天面に形成される凹凸と上側の箱の底面に形成される凹凸とが干渉して第１側面パネル１及び第３側面パネル３の左右方向への横ずれが抑制される。これにより、当該箱用シートを組み立ててなる複数の箱２１ａ，２１ｂは、積み重ね状態において安定的に保持され、荷崩れを十分に抑制することができる。また、当該箱用シートを組み立ててなる箱２１ａ，２１ｂにあっては、下側の箱２１ｂの天面に形成される凹部２５ｂの底点と上側の箱の底面に形成される凸部２４ａの頂点、及び下側の箱２１ｂの天面に形成される凸部２４ｂの頂点と上側の箱２１ａの底面に形成される凹部２５ａの底点とを厳密に位置合わせしなくても、凸部２４ａ，２４ｂ及び凹部２５ａ，２５ｂの干渉により箱の横ずれを十分に抑制することができるので、積み重ね作業の作業効率の低下を抑えることができる。 <Advantages>
The box sheet includes a pair of side panels (first side panel 1 and third side panel 3) facing each other in an assembled state, upper flaps 5 and 7 extending from the first side panel 1 and the third side panel 3, and Since the folding easy lines 14 to 17 formed at the boundary with the lower flaps 9 and 11 are formed in a wave shape from one end to the other end, the upper edges of the first side panel 1 and the third side panel 3 in the assembled state And the lower edge is formed in a wave shape curved in the vertical direction. Accordingly, the top and bottom surfaces of the box 21 formed by assembling the box sheet have convex portions 24 in the left-right direction of the first side panel 1 and the third side panel 3 due to the folding easy lines 14 to 17. And a swell in which the recess 25 continues. Therefore, when a plurality of boxes 21a and 21b formed by assembling the box sheets are stacked, the unevenness formed on the top surface of the lower box 21b interferes with the unevenness formed on the bottom surface of the upper box. The lateral displacement of the first side panel 1 and the third side panel 3 in the left-right direction is suppressed. Thereby, the plurality of boxes 21a and 21b formed by assembling the box sheets can be stably held in the stacked state, and the collapse of the load can be sufficiently suppressed. Further, in the boxes 21a and 21b formed by assembling the box sheets, the bottom points of the concave portions 25b formed on the top surface of the lower box 21b and the convex portions 24a formed on the bottom surface of the upper box. Even if the apex and the apex of the convex part 24b formed on the top surface of the lower box 21b and the bottom point of the concave part 25a formed on the bottom surface of the upper box 21a are not strictly aligned, the convex part 24a , 24b and the recesses 25a, 25b can sufficiently suppress the lateral displacement of the boxes, so that it is possible to suppress a reduction in the working efficiency of the stacking operation.

［その他の実施形態］
なお、本発明に係る箱用シートは、上記態様の他、種々の変更、改変を施した態様で実施することができる。 [Other Embodiments]
In addition, the box sheet | seat which concerns on this invention can be implemented in the aspect which gave the various change and modification other than the said aspect.

例えば側面パネルと上フラップとの境界に形成される折り曲げ容易線及びこの側面パネルと下フラップとの境界に形成される折り曲げ容易線の波形状は異なっていてもよい。当該箱用シートは、側面パネルと上フラップとの境界に形成される折り曲げ容易線及び側面パネルと下フラップとの境界に形成される折り曲げ容易線の波形状が正確に一致していなくても積み重ね作業性及び積み重ねられた場合における安定性を向上することができる。 For example, the waveform of the foldable line formed at the boundary between the side panel and the upper flap and the waveform of the foldable line formed at the boundary between the side panel and the lower flap may be different. The box sheet is stacked even if the waveform of the foldable line formed at the boundary between the side panel and the upper flap and the waveform of the foldable line formed at the boundary between the side panel and the lower flap do not exactly match. Workability and stability when stacked can be improved.

展開状態における一対の側面パネルと一対の上フラップとの境界に形成される一対の折り曲げ容易線の波形状、及び一対の側面パネルと一対の下フラップとの境界に形成される一対の折り曲げ容易線の波形状は異なっていてもよい。当該箱用シートは、展開状態における一対の側面パネルと一対の上フラップとの境界に形成される一対の折り曲げ容易線の波形状、及び一対の側面パネルと一対の下フラップとの境界に形成される一対の折り曲げ容易線の波形状は異なっている場合でも、一対の側面パネルの左右方向における横ずれを十分に抑制できるので、複数の箱の荷崩れを抑制することができる。 A wave shape of a pair of easy folding lines formed at the boundary between the pair of side panels and the pair of upper flaps in the unfolded state, and a pair of easy folding lines formed at the boundary between the pair of side panels and the pair of lower flaps. The wave shapes of may be different. The box sheet is formed at a boundary between the pair of side panels and the pair of lower flaps, and at the boundary between the pair of side panels and the pair of lower flaps. Even when the wave shapes of the pair of easy-to-bend lines are different, the lateral displacement of the pair of side panels in the left-right direction can be sufficiently suppressed, so that the collapse of the plurality of boxes can be suppressed.

各折り曲げ容易線は、側面パネルの左右方向の中央を基準として一方側に１つの山部を有し、他方側に１つの谷部を有することが好ましいが、側面パネルの左右方向の中央を基準として一方側及び他方側にそれぞれ１又は複数の山部及び谷部を有していてもよい。 Each foldable line preferably has one peak on one side and one valley on the other side with respect to the center in the left-right direction of the side panel. As described above, one or a plurality of peaks and valleys may be provided on one side and the other side, respectively.

当該箱用シートは、上述のように、折り曲げ容易線が、長辺側面パネルと上フラップ及び下フラップとの境界に形成されることが好ましいが、この折り曲げ容易線は短辺側面パネルと上フラップ及び下フラップとの境界に形成されていてもよい。また、上記折り曲げ容易線は、長辺側面パネルと上フラップ及び下フラップとの境界、並びに短辺側面パネルと上フラップ及び下フラップとの境界の両方に形成されていてもよい。 In the box sheet, as described above, it is preferable that the folding easy line is formed at the boundary between the long side panel and the upper flap and the lower flap. And may be formed at the boundary with the lower flap. The easy folding line may be formed at both the boundary between the long side panel and the upper and lower flaps, and at the boundary between the short side panel and the upper and lower flaps.

以上のように、本発明に係る箱用シートは、積み重ね作業の作業効率の低下を抑えつつ、複数の箱の荷崩れを十分に抑制することができるので、商品保管用、商品陳列用等に用いられる各種包装箱用シートとして適している。 As described above, the box sheet according to the present invention can sufficiently suppress the collapse of a plurality of boxes while suppressing a decrease in the work efficiency of the stacking operation. Suitable as a sheet for various packaging boxes used.

１第１側面パネル
２第２側面パネル
３第３側面パネル
４第４側面パネル
５〜８上フラップ
９〜１２下フラップ
１３糊代部
１４〜１７折り曲げ容易線
２１，２１ａ，２１ｂ箱
２２山部
２３谷部
２４，２４ａ，２４ｂ凸部
２５，２５ａ，２５ｂ凹部
Ｘ封函テープ DESCRIPTION OF SYMBOLS 1 1st side panel 2 2nd side panel 3 3rd side panel 4 4th side panel 5-8 Upper flap 9-12 Lower flap 13 Glue margin 14-17 Folding easy line 21,21a, 21b Box 22 Mountain part 23 Valley 24, 24a, 24b Convex 25, 25a, 25b Concave X Sealing tape

Claims

A first side panel, a second side panel, a third side panel and a fourth side panel connected in the left-right direction; a pair of upper outer flaps extending from the upper edges of the first side panel and the third side panel; A pair of upper inner flaps extending from the upper edges of the second side panel and the fourth side panel; and a pair of lower outer flaps extending from the lower edges of the first side panel and the third side panel; A pair of lower inner flaps extending from the lower edges of the second side panel and the fourth side panel ;
A box sheet that can be assembled into a box shape by connecting a first side panel on one end side in the connecting direction and a fourth side panel on the other end side in the connecting direction to form a square cylindrical part,
And the first side panel and the third side panel and easily wire bent respectively at the boundary between the upper side outer flap and a lower outer flap extending from the first side panel and the third side panel is formed opposite in the assembled state ,
Each foldable line is formed in a wave shape from one end to the other end ,
The easy-bending line formed at the boundary between the first side panel and the upper outer flap and the boundary between the first side panel and the lower outer flap has the same wave shape from one end to the other end in the connecting direction of the first side panel. And an easy-to-bend line formed at the boundary between the third side panel and the upper outer flap and at the boundary between the third side panel and the lower outer flap extends from one end in the connecting direction of the third side panel. It has the same wave shape over the edge,
In the unfolded state, an easy folding line formed at the boundary between the first side panel and the upper outer flap and the boundary between the third side panel and the upper outer flap is connected to the first side panel and the third side panel. An easy-bending line having the same wave shape from one end of the direction to the other end and formed at the boundary between the first side panel and the lower outer flap and at the boundary between the third side panel and the lower outer flap A box sheet having the same wave shape from one end to the other end in the connecting direction of the first side panel and the third side panel .

Each folding easier line has one crest on one side a central in the lateral direction of the first side panel and the third side panel as a reference, according to claim 1 having one valley on the other side Box sheet.

The box sheet according to claim 1 or 2 , wherein the first side panel and the third side panel are long side panels.