JP2020104935A

JP2020104935A - Packaging box

Info

Publication number: JP2020104935A
Application number: JP2018248142A
Authority: JP
Inventors: 紀明村尾; Noriaki Murao; 勝久渡邉; Katsuhisa Watanabe; 貴夫小泉; Takao Koizumi; 祐介戸津; Yusuke Totsu; 貴史五十嵐; Takashi Igarashi; 小百合梅崎; Sayuri Umezaki; 啓人岡野; Hiroto Okano
Original assignee: Tomoku KK
Current assignee: Tomoku KK
Priority date: 2018-12-28
Filing date: 2018-12-28
Publication date: 2020-07-09
Anticipated expiration: 2038-12-28
Also published as: JP7253375B2

Abstract

To provide a packaging box capable of preventing the packaging box from being vertically displaced when being stacked, with an easy configuration.SOLUTION: A bottomed cylinder-shaped packaging box 1 made of paper, which has a side wall part 3 erected on the peripheral edge of a bottom plate part 2, comprises foldable pieces 4 provided on the bottom plate part 2, the foldable pieces surrounded by a first bending line 5 and a bent or curved-shaped foldable piece cut line 41 which connects both ends of the first bending line 5.SELECTED DRAWING: Figure 1

Description

本発明は、積み重ねた際の上下の包装箱のずれを防止する構造を有する包装箱に関する。 The present invention relates to a packaging box having a structure that prevents the upper and lower packaging boxes from being displaced when stacked.

従来、この種の包装箱として、底板部の周縁に側壁部が立設された有底筒状の紙製の包装箱であって、底板部の四隅に切れ込みを設けて三角錐状のストッパーを裏面側から差し込んだものが知られている（特許文献１参照）。 Conventionally, as this type of packaging box, it is a bottomed tubular paper packaging box in which side walls are erected on the periphery of the bottom plate, and a triangular pyramid shaped stopper is provided by providing cuts at the four corners of the bottom plate. It is known to insert from the back side (see Patent Document 1).

特許文献１の包装箱によれば、包装箱を上下に積み重ねた際に、上側の包装箱のストッパーが下側の包装箱の側壁部に係止されるため、上下の包装箱のずれ防止が図られる。 According to the packaging box of Patent Document 1, when the packaging boxes are stacked vertically, the stopper of the upper packaging box is locked to the side wall portion of the lower packaging box, so that the upper and lower packaging boxes are prevented from shifting. Planned.

登録実用新案第３０４９４７９号公報Registered utility model No. 3049479

しかしながら、特許文献１の包装箱では、前記ストッパーを組み立てるために、包装箱とは別に厚紙を用意する必要があり、かつ、その組立も複雑であるため煩雑であった。 However, in the packaging box of Patent Document 1, in order to assemble the stopper, it is necessary to prepare thick paper separately from the packaging box, and the assembly is complicated, which is complicated.

上記の点に鑑み、本発明は、簡易な構成で積み重ねた際の上下の包装箱のずれを防止することができる包装箱を提供することを目的とする。 In view of the above points, an object of the present invention is to provide a packaging box that can prevent the upper and lower packaging boxes from being displaced when stacked with a simple structure.

かかる目的を達成するために、本発明の包装箱は、底板部の周縁に側壁部が立設された有底筒状の紙製の包装箱であって、前記底板部には、第１折目線と該第１折目線の両端を繋ぐ屈曲状または湾曲状の折返片用切目線とで囲まれる折返片が設けられていることを特徴とする。 In order to achieve such an object, the packaging box of the present invention is a bottomed tubular paper packaging box in which a side wall portion is erected on the periphery of the bottom plate portion, and the bottom plate portion has a first fold. The folding piece is characterized by being provided with a folding line that is surrounded by the line of sight and a bending line or a bending line for folding line that connects both ends of the first folding line.

本発明の包装箱では、底板部に、第１折目線と該第１折目線の両端を繋ぐ屈曲状または湾曲状の折返片用切目線とで囲まれる折返片が設けられているため、第１折目線を回転軸として折返片を底板部の裏面側に折り返すことができる。 In the packaging box of the present invention, since the bottom plate portion is provided with the folded piece surrounded by the first fold line and the bent or curved cut line for the folded piece that connects both ends of the first fold line, The folding piece can be folded back to the back surface side of the bottom plate with the first fold line as the axis of rotation.

これにより、包装箱を上下に積み重ねた際に、上側の包装箱の折返片が下側の包装箱の側壁部に係止されるため、上下の包装箱のずれ防止が図られる。 Thus, when the packaging boxes are stacked vertically, the folded pieces of the upper packaging box are locked to the side wall portions of the lower packaging box, so that the upper and lower packaging boxes are prevented from being displaced.

よって、本発明の包装箱によれば、簡易な構成で積み重ねた際の上下の包装箱のずれを防止することができる。 Therefore, according to the packaging box of the present invention, it is possible to prevent the upper and lower packaging boxes from being displaced when stacked with a simple structure.

また、本発明の包装箱において、前記第１折目線は断続的に形成され、隣接する前記第１折目線の間には、該隣接する前記第１折目線を繋ぐ仮想線と、該隣接する前記第１折目線の端部を繋ぎ該仮想線を挟んで前記折返片用切目線の反対側に向かって凸状の係止片用切目線とで囲まれる係止片が設けられ、前記係止片の基端から先端までの長さは、前記仮想線を対象軸とする線対称位置の前記折返片の基端から先端までの長さより大であるとともに、厚み方向に沿って該係止片を撓曲変形させることで前記底板部から前記折返片が遊離することで該底板部に該遊離片の形状に対応して形成される開口部を通過可能な長さであることが好ましい。 Further, in the packaging box of the present invention, the first fold lines are intermittently formed, and between the adjacent first fold lines, an imaginary line connecting the adjacent first fold lines and the imaginary line connecting the adjacent first fold lines are adjacent to each other. A locking piece is provided which is connected to the ends of the first fold line and is surrounded by a convex cut line for the locking piece toward the opposite side of the folding line for the folding piece across the virtual line. The length from the base end to the tip of the stop piece is greater than the length from the base end to the tip of the folded piece at the line symmetrical position with the virtual line as the target axis, and the locking along the thickness direction. It is preferable that the bending piece is flexibly deformed to release the folded piece from the bottom plate portion so that the piece can pass through an opening formed in the bottom plate portion corresponding to the shape of the loose piece.

まず、第１折目線を回転軸として折返片を底板部の裏面側に折り返した場合、前記底板部から前記折返片が遊離することで該底板部に該遊離片の形状に対応して開口部が形成される。そして、折返片と同様に第１折目線を回転軸とする該係止片は、前記第１切目の反対側に向かって凸状に形成されているため、底板部の表面側で反転して、開口部の外縁に接する。 First, when the folded piece is folded back to the back surface side of the bottom plate portion with the first fold line as a rotation axis, the folded piece is released from the bottom plate portion, and the opening portion is formed in the bottom plate portion corresponding to the shape of the released piece. Is formed. And, like the folding piece, the locking piece having the first fold line as the rotation axis is formed in a convex shape toward the opposite side of the first cut, and therefore is inverted on the surface side of the bottom plate portion. , Touch the outer edge of the opening.

このとき、該係止片の基端から先端までの長さは、厚み方向に沿って該係止片を撓曲変形させることで前記開口部を通過可能な長さであるため、係止片を開口部の下方に押し込むことで、係止片は開口部を通過する。そして、係止片の基端から先端までの長さは、前記仮想線を対象軸とする線対称位置の前記折返片の基端から先端までの長さより大であるため、第１折目線の弾性変形により、係止片の先端部は、底板部の裏面側において開口部の外縁に係止される。 At this time, the length from the base end to the tip of the locking piece is such that it can pass through the opening by bending and deforming the locking piece along the thickness direction. By pushing the lower part of the opening, the locking piece passes through the opening. Since the length from the base end to the tip of the locking piece is larger than the length from the base end to the tip of the folding piece at the line symmetrical position with the virtual line as the target axis, the length of the first fold line Due to the elastic deformation, the tip of the locking piece is locked to the outer edge of the opening on the back surface side of the bottom plate.

以上より、上記構成を備える包装箱によれば、折返片を底板部に折り重ねた状態で固定することができるため、より確実に積み重ねた際の上下の包装箱のずれを防止することができる。 As described above, according to the packaging box having the above configuration, since the folded piece can be fixed to the bottom plate portion in a folded state, it is possible to prevent the upper and lower packaging boxes from being displaced when stacked more reliably. ..

また、本発明の包装箱において、前記側壁部は複数の側板が順次連接されることで角筒状に形成され、前記折返片の周縁は、隣接する前記側板の上端部内面側にそれぞれ係止されることが好ましい。 Also, in the packaging box of the present invention, the side wall portion is formed into a rectangular tube shape by sequentially connecting a plurality of side plates, and the periphery of the folded piece is locked to the inner surface of the upper end portion of the adjacent side plate. Preferably.

この構成によれば、上側の包装箱の係止片は、下側の包装箱の隣接している２つの側板によって係止されるため、より確実に上下の包装箱のずれ防止を図ることができる。 According to this structure, since the locking pieces of the upper packaging box are locked by the two adjacent side plates of the lower packaging box, the upper and lower packaging boxes can be more reliably prevented from being displaced. it can.

さらに、この構成を備える包装箱において、前記隣接する側板の境界には、該隣接する側板の内面を繋ぐ支柱板が前記側壁部の軸線に沿って延設され、前記折返片の周縁は、前記支柱板の上端部内面側に係止されることが好ましい。 Furthermore, in the packaging box having this configuration, at the boundary between the adjacent side plates, a support plate that connects the inner surfaces of the adjacent side plates is provided along the axis of the side wall portion, and the peripheral edge of the folded piece is It is preferable that the support plate is locked to the inner surface of the upper end portion.

この構成によれば、上側の包装箱の折返片は、下側の包装箱の２つの側板と支柱板との３箇所で係止されるため、より確実に上下の包装箱のずれ防止を図ることができる。 According to this configuration, since the folded piece of the upper packaging box is locked at the three positions of the two side plates and the support plate of the lower packaging box, the upper and lower packaging boxes are more reliably prevented from shifting. be able to.

本実施形態における包装箱の裏面を示す斜視図。The perspective view which shows the back surface of the packaging box in this embodiment. 図１の包装箱の展開図。The development view of the packaging box of FIG. 図１の包装箱の組立工程を説明するための説明図であって、折返片を係止片で係止する工程を示す斜視図。FIG. 6 is an explanatory view for explaining the assembling process of the packaging box of FIG. 1, and is a perspective view showing a process of locking the folded piece with a locking piece. 図１の包装箱の組立工程を説明するための説明図であって、側壁部を組み立てる工程を示す斜視図。FIG. 3 is an explanatory view for explaining an assembly process of the packaging box of FIG. 1, and is a perspective view showing a process of assembling the side wall portion. 図１の包装箱の組立工程を説明するための説明図であって、内壁部を側壁部の内方に折り返した状態を示す斜視図。FIG. 3 is an explanatory view for explaining an assembling process of the packaging box of FIG. 1, and is a perspective view showing a state where the inner wall portion is folded back inward of the side wall portion. 図１の包装箱を閉蓋して積み重ねた状態を示す斜視図。FIG. 2 is a perspective view showing a state in which the packaging boxes of FIG. 1 are closed and stacked. 図６の下側の包装箱と上側の包装箱の折返片との位置関係を示す平面図。FIG. 7 is a plan view showing the positional relationship between the lower packaging box of FIG. 6 and the folded piece of the upper packaging box. 本実施形態の包装箱における折返片の変形例を示す平面図。The top view which shows the modification of the folding piece in the packaging box of this embodiment.

本実施形態の包装箱１は、図１に示すように、矩形状の底板部２と、底板部２の周縁から立設された四角筒状の側壁部３とによって有底筒状に形成されている。 As shown in FIG. 1, the packaging box 1 of the present embodiment is formed in a bottomed tubular shape by a rectangular bottom plate portion 2 and a square tubular side wall portion 3 standing upright from the peripheral edge of the bottom plate portion 2. ing.

底板部２の裏面には、四隅に略六角形状の折返片４が形成されている。折返片４は、第１折目線５を回転軸として底板部２から折り返されて、一体に形成された略台形状の係止片６によって、底板部２に係止されている。 On the back surface of the bottom plate portion 2, substantially hexagonal folding pieces 4 are formed at the four corners. The folding piece 4 is folded back from the bottom plate portion 2 with the first fold line 5 as a rotation axis, and is locked to the bottom plate portion 2 by a substantially trapezoidal locking piece 6 formed integrally.

側壁部３は、対向する一対の第１側板７と、該第１側板７の対向する方向に直交する方向で対向する一対の第２側板８とが順次連接されることで略四角筒状に形成されている。 The side wall portion 3 has a substantially rectangular tubular shape by sequentially connecting a pair of first side plates 7 that face each other and a pair of second side plates 8 that face each other in a direction orthogonal to the direction in which the first side plates 7 face each other. Has been formed.

包装箱１は、図２に示すように、打抜き形成された段ボール板紙１０から組み立てられる。 As shown in FIG. 2, the packaging box 1 is assembled from a corrugated paperboard board 10 formed by punching.

図２に示すように、底板部２の四隅には、第１折目線５が形成されている。第１折目線５は、底板部２の隣接する端縁のそれぞれから所定の間隔を存するとともに、該隣接する端縁のそれぞれに対して約４５°をなす角度で断続的に２つずつ形成されている。 As shown in FIG. 2, first fold lines 5 are formed at the four corners of the bottom plate portion 2. The first fold line 5 is spaced from each of the adjacent edges of the bottom plate portion 2 by a predetermined distance, and two first fold lines 5 are intermittently formed at an angle of about 45° with respect to each of the adjacent edges. ing.

一対の第１折目線５のうち隣接する側の端部同士は、底板部２の四隅に向かって凸な略Ｕ字状の係止片用切目線６１によって接続されている。この係止片用切目線６１と一対の第１折目線５を結ぶ仮想線とで囲まれた略台形状の領域が係止片６である。 The ends of the pair of first fold lines 5 on the adjacent sides are connected to each other by substantially U-shaped locking piece cut lines 61 that are convex toward the four corners of the bottom plate portion 2. A substantially trapezoidal area surrounded by the cut line 61 for the locking piece and an imaginary line connecting the pair of first fold lines 5 is the locking piece 6.

一対の第１折目線５のうち反対側の端部同士は、底板部２の四隅から離れる方向に凸な略舟底型の折返片用切目線４１によって接続されている。折返片用切目線４１は、第１折目線５と平行な第１の折返片用切目線４１ａと、該第１の折返片用切目線４１ａの両端から底板部２の四隅に近づく方向に１３５°傾いた第２の折返片用切目線４１ｂと、該第２の切目の先端から第１折目線５に直交するように延びる第３の切目４１ｃから形成されている。この折返片用切目線４１と一対の第１折目線５を含んだ仮想線とで囲まれた略６角形状の領域が折返片４である。 The opposite ends of the pair of first fold lines 5 are connected to each other by a substantially boat-bottomed fold line cut line 41 that is convex in the direction away from the four corners of the bottom plate 2. The fold line 41 for the folded piece has a first fold line 41a for the folded piece parallel to the first fold line 5 and 135 from the both ends of the first fold line 41a for the folded piece toward the four corners of the bottom plate portion 2. It is formed by a second folded piece cut line 41b that is inclined and a third cut line 41c that extends from the tip of the second cut line so as to be orthogonal to the first fold line 5. The folded piece 4 is a region of a substantially hexagonal shape surrounded by the cut line 41 for folded piece and the virtual line including the pair of first folded lines 5.

この折返片４の長さと係止片６の長さ（それぞれ仮想線から各先端までの距離を意味するものとする。）と比べると、係止片６の方が折返片４よりも若干長く形成されている。 Compared with the length of the folding piece 4 and the length of the locking piece 6 (meaning the distance from each imaginary line to each tip), the locking piece 6 is slightly longer than the folding piece 4. Has been formed.

また、底板部２の中央には、円形通気孔３１が６つ形成されている。また、底板部２の左右端縁には、矩形状の嵌合孔３２がそれぞれ２つ形成されている。 Further, six circular vent holes 31 are formed in the center of the bottom plate portion 2. Further, two rectangular fitting holes 32 are formed on each of the left and right edges of the bottom plate portion 2.

図２に示すように、底板部２の上下端縁には、折目線ａを介して第１側板７が連設されている。また、第１側板７の左右端縁には、折目線ｂを介して補強フラップ７１が連設されている。 As shown in FIG. 2, a first side plate 7 is continuously provided on the upper and lower edges of the bottom plate portion 2 via a fold line a. In addition, reinforcing flaps 71 are continuously provided on the left and right edges of the first side plate 7 through fold lines b.

第１側板７には、先端中央に凹部７２が形成されている。また、第１側板７には、基端から先端側に向かって折目線ａから直角に延びる細長通気孔７３が３つ形成されている。 The first side plate 7 has a recess 72 formed at the center of the tip. Further, the first side plate 7 is formed with three elongated ventilation holes 73 extending from the base end toward the tip end at a right angle from the fold line a.

図２に示すように、底板部２の左右端縁には、折目線ｃを介して第２側板８が連設されている。第２側板８には、折目線ｃに平行な折目線ｄと該折目線ｄの両端を繋ぐ把持用切れ目８１とが形成されている。第２側板８には、この把持用切れ目８１を破断して折目線ｄを回転軸として第２側板の内方に折り込むことで把持孔８２が形成される。 As shown in FIG. 2, the left and right edges of the bottom plate portion 2 are continuously provided with second side plates 8 via fold lines c. The second side plate 8 is formed with a fold line d parallel to the fold line c and a grip cut 81 connecting both ends of the fold line d. A grip hole 82 is formed in the second side plate 8 by breaking the grip cut 81 and folding the grip line inwardly of the second side plate about the fold line d as a rotation axis.

第２側板８の先端縁には、折目線ｅを介して細長矩形状の枠片部８３が形成されている。枠片部８３の先端中央には、先端縁から突出する方向に凸な倒Ｕ字状の切れ目８４によって、蓋係止部８５が形成されている。 An elongated rectangular frame piece portion 83 is formed at the leading edge of the second side plate 8 via a fold line e. A lid locking portion 85 is formed at the center of the front end of the frame piece portion 83 by an inverted U-shaped cut 84 protruding in the direction protruding from the front end edge.

枠片部８３の先端縁には、切れ目８４の両端からそれぞれ上下方向に延びる一対の折目線ｆを介して内壁部９が連設されている。 The inner wall portion 9 is continuously provided on the leading edge of the frame piece portion 83 through a pair of fold lines f extending in the vertical direction from both ends of the cut 84.

内壁部９には、先端部中央に矩形状の手孔用開口９１が形成されている。手孔用開口９１は、内壁部９を折目線ｅ及び折目線ｆにより第８側壁に沿うように折り返したときに、把持孔８２に対応する位置に形成されている。 In the inner wall portion 9, a rectangular hand hole opening 91 is formed at the center of the tip portion. The hand hole opening 91 is formed at a position corresponding to the grip hole 82 when the inner wall portion 9 is folded back along the eighth side wall along the fold line e and the fold line f.

内壁部９の先端縁の左右両側からは、該先端縁から突出する篏合突出部９２がそれぞれ形成されている。篏合突出部９２は、内壁部９を折目線ｅ及び折目線ｆにより第８側壁に沿うように折り返したときに、嵌合孔３２に嵌合されるものである。 From both left and right sides of the tip edge of the inner wall portion 9, there are formed mating protrusions 92 that protrude from the tip edge. The mating protrusion 92 is fitted into the fitting hole 32 when the inner wall 9 is folded back along the eighth side wall along the fold line e and the fold line f.

内壁部９の左右端縁には、折目線ｇを介して、矩形状の支柱板９３が連設されている。第２側板８の横幅は、内壁部９の横幅より大であるが、この一対の支柱板９３の先端間の距離より小である。より具体的には、支柱板９３の長さ（基端から先端の長さ）は、第２側板８の横幅から内壁部９の横幅を減じた長さを２の平方根で除した長さである。言い換えれば、支柱板９３の長さ（基端から先端の長さ）は、第２側板８の横幅から内壁部９の横幅を減じた長さの半分に２の平方根を乗じた長さである。そして、支柱板９３の長さ（基端から先端の長さ）は、折返片４の第１の折返片用切目線４１ａの長さと実質的に同一である。 Rectangular pillar plates 93 are continuously provided on the left and right edges of the inner wall portion 9 via a fold line g. The lateral width of the second side plate 8 is larger than the lateral width of the inner wall portion 9, but smaller than the distance between the tips of the pair of column plates 93. More specifically, the length of the strut plate 93 (the length from the base end to the tip) is the length obtained by subtracting the width of the inner wall portion 9 from the width of the second side plate 8 by the square root of 2. is there. In other words, the length of the support plate 93 (the length from the base end to the tip) is the length obtained by multiplying the square width of 2 by half the length obtained by subtracting the horizontal width of the inner wall portion 9 from the horizontal width of the second side plate 8. .. The length (the length from the base end to the tip) of the support plate 93 is substantially the same as the length of the first folding piece cut line 41a of the folding piece 4.

支柱板９３の先端縁には、折目線ｈを介して、該支柱板９３とほぼ同形状の補強片９４が連設されている。 A reinforcing piece 94 having substantially the same shape as that of the strut plate 93 is connected to the tip edge of the strut plate 93 via a fold line h.

次いで、以上のように構成された包装箱１の組立て作業について説明する。 Next, the assembling work of the packaging box 1 configured as above will be described.

まず、図２における左下の折返片４を係止する作業を図３Ａ乃至図３Ｃを用いて説明する。なお、図２及び図３の段ボール板紙１０の表面側は、包装箱１の内面側に相当するものである。 First, the work of locking the folding piece 4 at the lower left in FIG. 2 will be described with reference to FIGS. 3A to 3C. The front side of the corrugated paperboard 10 shown in FIGS. 2 and 3 corresponds to the inner side of the packaging box 1.

図３Ａに示すように、折返片４を底板部２の裏面側に向かって押し込む。これにより、折返片４が底板部２から遊離されるため、底板部２には、折返片４の外縁に対応した周縁を持つ折返開口部４２（本発明の「開口部」に相当する。）が形成される。そして、さらに折返片４を底板部２の裏面側に向かって押し込むことで、折返片４は、第１折目線５を回動軸として底板部２の裏面に接するまで折り返される。 As shown in FIG. 3A, the folding piece 4 is pushed toward the back surface side of the bottom plate portion 2. As a result, the folded-back piece 4 is released from the bottom plate portion 2, and therefore the folded-back opening portion 42 (corresponding to the “opening portion” of the present invention) having a peripheral edge corresponding to the outer edge of the folded-back piece 4 is formed in the bottom plate portion 2. Is formed. Then, by further pushing the folding piece 4 toward the back surface side of the bottom plate portion 2, the folding piece 4 is folded back until it comes into contact with the back surface of the bottom plate portion 2 with the first fold line 5 as the rotation axis.

このとき、折返片４の基端側には、係止片６が一体として形成されているため、係止片６も第１折目線５を回動軸として回動される。そして、係止片６の長さは、折返片４の長さよりも若干大であるため、係止片６の先端部は、底板部２の表面側において折返開口部４２の周縁部に接する。 At this time, since the locking piece 6 is integrally formed on the base end side of the folding piece 4, the locking piece 6 is also rotated with the first fold line 5 as the rotation axis. Since the length of the locking piece 6 is slightly larger than the length of the folding piece 4, the tip of the locking piece 6 contacts the peripheral edge of the folding opening 42 on the front surface side of the bottom plate 2.

次に、係止片６を底板部２の表面側から裏面側に向かって無理やり押圧する。これにより、図３Ｂに示すように、係止片６は、厚み方向に沿って（図３Ｂでいえば、奥行き側から手前側に向かって）撓曲変形される。 Next, the locking piece 6 is forcibly pressed from the front surface side of the bottom plate portion 2 toward the back surface side. As a result, as shown in FIG. 3B, the locking piece 6 is flexibly deformed along the thickness direction (from the depth side to the front side in FIG. 3B).

さらに、係止片６を底板部２の表面側から裏面側に向かって押圧すると、係止片６は、折返開口部４２の周縁部を通過し、底板部２の裏面側に配置される。そして、係止片６に対する押圧を解除すると、段ボールの弾性変形により、係止片６は、撓曲変形が解除されるとともに、第１折目線５を回動軸として押圧時とは逆方向に回動される。 Further, when the locking piece 6 is pressed from the front surface side of the bottom plate portion 2 toward the back surface side, the locking piece 6 passes through the peripheral edge portion of the folding opening portion 42 and is arranged on the back surface side of the bottom plate portion 2. Then, when the pressing on the locking piece 6 is released, the elastic deformation of the corrugated board releases the bending deformation of the locking piece 6, and in the direction opposite to the pressing direction with the first fold line 5 as the rotation axis. It is rotated.

このとき、係止片６の長さは、撓曲変形が解除されることで折返片４の長さよりも若干大に復元しているため、係止片６の先端部は、底板部２の裏面側において折返開口部４２の周縁部に係止される。 At this time, the length of the locking piece 6 is restored to be slightly larger than the length of the folding piece 4 by releasing the flexural deformation. The back side is locked to the peripheral edge of the folding opening 42.

これにより、折返片４は、底板部２の裏面に折り返された状態で、係止片６により係止される。 As a result, the folding piece 4 is locked by the locking piece 6 in a state of being folded back on the back surface of the bottom plate portion 2.

次に、箱形状への組立てについて説明する。 Next, a box-shaped assembly will be described.

まず、組立てに先んじて、図２に示す展開状態で、補強片９４を折目線ｈで谷折りして、支柱板９３の表面に折り返して接着しておく。 First, prior to assembly, the reinforcing piece 94 is valley-folded along the fold line h in the unfolded state shown in FIG. 2 and folded back and adhered to the surface of the support plate 93.

次に、図４に示すように、折目線ａに沿って両第１側板７を垂直方向に折り曲げ、さらに、両第１側板７から連設されている各補強フラップ７１を折目線ｂに沿って、底板部２及び第１側板７の双方に略直交する角度にそれぞれ折り曲げる。 Next, as shown in FIG. 4, both the first side plates 7 are vertically bent along the fold line a, and further, the respective reinforcing flaps 71 connected from the both first side plates 7 are laid along the fold line b. And is bent at an angle substantially orthogonal to both the bottom plate portion 2 and the first side plate 7.

次に、各補強フラップ７１の外側に接するように、折目線ｃに沿って両第２側板８を垂直方向に折り曲げる。 Next, both second side plates 8 are bent in the vertical direction along the fold line c so as to contact the outside of each reinforcing flap 71.

次に、図５に示すように、枠片部８３を折目線ｅに沿って水平方向に折り曲げ、さらに、枠片部８３の先端縁から連設された内壁部を折目線ｆに沿って垂直方向に折り曲げて、第２側板８と内壁部９とで補強フラップ７１を挟み込む。 Next, as shown in FIG. 5, the frame piece portion 83 is bent horizontally along the fold line e, and the inner wall portion continuously provided from the leading edge of the frame piece portion 83 is vertically bent along the fold line f. The reinforcing flap 71 is sandwiched between the second side plate 8 and the inner wall portion 9 by bending in the direction.

内壁部９を折目線ｆに沿って垂直方向に折り曲げる際、一対の折目線ｆは、切れ目８４によって分断されているため、切れ目８４によって形成された蓋係止部８５は、垂直方向に折り曲げられることなく、枠片部８３から箱体の内方に向かって水平方向に延出される。 When the inner wall portion 9 is bent in the vertical direction along the fold line f, the pair of fold lines f are divided by the cut 84, and thus the lid locking portion 85 formed by the cut 84 is bent in the vertical direction. Without extending from the frame piece portion 83 toward the inside of the box body in the horizontal direction.

また、内壁部９を折目線ｆに沿って垂直方向に折り曲げる際、外側に配置される第２側板８の横幅に比べて、内壁部９の横幅は小であるが、内壁部９に連設された一対の支柱板９３まで含めた幅（一対の支柱板９３の先端間の距離）は大であるため、支柱板９３は、第１側板７により折目線ｇに沿って谷折りされながら、箱体の内部側に折り込まれる。 Further, when the inner wall portion 9 is bent in the vertical direction along the fold line f, the width of the inner wall portion 9 is smaller than the width of the second side plate 8 arranged outside, but the inner wall portion 9 is continuously provided. Since the width including the pair of strut plates 93 thus formed (the distance between the tips of the pair of strut plates 93) is large, the strut plate 93 is valley-folded along the fold line g by the first side plate 7, It is folded inside the box.

そして、支柱板９３には、折目線ｇに沿って段ボールの復元力が発生しているため、支柱板９３の先端縁は、第１側板７の内表面に押し付けられて係止される。 Then, since the corrugated cardboard restoring force is generated on the strut plate 93 along the fold line g, the leading edge of the strut plate 93 is pressed against the inner surface of the first side plate 7 and locked.

また、支柱板９３の長さ（基端から先端の長さ）は、第２側板８の横幅から内壁部９の横幅を減じた長さの半分に２の平方根を乗じた長さであるため、第１側板７、第２側板８及び支柱板９３で囲まれる領域は、平面視において、支柱板９３を斜辺とする略直角二等辺三角形を形成する。 Further, the length of the support plate 93 (the length from the base end to the tip) is the length obtained by multiplying the half width of the width of the second side plate 8 minus the width of the inner wall portion 9 by the square root of 2. The region surrounded by the first side plate 7, the second side plate 8 and the support plate 93 forms a substantially isosceles right triangle having the support plate 93 as a hypotenuse in plan view.

さらに、内壁部９を折目線ｆに沿って垂直方向に折り曲げた後、内壁部９の先端に形成された篏合突出部９２を底板部２の嵌合孔３２に嵌合する。 Further, after the inner wall portion 9 is bent in the vertical direction along the fold line f, the mating protrusion 92 formed at the tip of the inner wall portion 9 is fitted into the fitting hole 32 of the bottom plate portion 2.

最後に、必要に応じて、第２側板８の把持用切れ目８１を破断して折目線ｄを回転軸として箱体の内部側に折り込むことで把持孔８２を形成する。 Finally, if necessary, the gripping cut 81 of the second side plate 8 is broken and folded into the inside of the box body with the fold line d as a rotation axis to form a gripping hole 82.

以上により、包装箱１が組み立てられる。 As described above, the packaging box 1 is assembled.

さらに、組み立てられた包装箱１は、図６に示すように、内容物を収納したうえで、包装箱１の内周よりも外周が若干小さい略８角形状の蓋板２０を内部に挿入して上面を閉塞させることができる。そして、組み立てられた包装箱１は、図６に示すように、複数、積み重ねることができる。 Further, as shown in FIG. 6, the assembled packaging box 1 has a substantially octagonal lid plate 20 in which the contents are stored and the outer circumference is slightly smaller than the inner circumference of the packaging box 1 inside. The upper surface can be closed. Then, a plurality of the assembled packaging boxes 1 can be stacked as shown in FIG.

次に、本実施形態の包装箱１の作用効果について説明する。 Next, the function and effect of the packaging box 1 of this embodiment will be described.

包装箱１では、折返片４が底板部２の裏面に折り返されて底板部２の裏面から段ボール板紙１０の厚さの分だけ突出させることができる。また、包装箱１では、係止片６により、折返片４をこの折り返した状態で維持することができる。 In the packaging box 1, the folding piece 4 can be folded back to the back surface of the bottom plate portion 2 and protruded from the back surface of the bottom plate portion 2 by the thickness of the corrugated paperboard 10. Further, in the packaging box 1, the folding piece 4 can be maintained in this folded state by the locking piece 6.

そして、包装箱１では、上下に包装箱１を積み重ねたときに、底板部２の裏面から突出した折返片４を下側の包装箱１の側壁部３の上端部の内表面側に折返片４を係止させることができため、上下の包装箱のずれ防止を図ることができる。 In the packaging box 1, when the packaging boxes 1 are stacked on top of each other, the folding piece 4 protruding from the back surface of the bottom plate portion 2 is folded to the inner surface side of the upper end of the side wall portion 3 of the lower packaging box 1. Since 4 can be locked, it is possible to prevent the upper and lower packaging boxes from shifting.

また、図７に示すように、包装箱１では、平面視において、第１側板７、第２側板８及び支柱板９３で囲まれる領域は、支柱板９３を斜辺とする略直角二等辺三角形を形成しているため、第１側板７の内表面と支柱板９３の内表面、及び、支柱板９３の内表面と第２側板８の内表面は、それぞれ略１３５°で接続されている。これに対して、折返片４のうち第１の折返片用切目線４１ａにより形成された先端縁に対して、各第２の折返片用切目線４１ｂにより形成された先端縁は、それぞれ１３５°屈曲している。さらに、第１の折返片用切目線４１ａの長さと支柱板９３の長さ（基端から先端までの長さ）とは実質的に同一であるため、折返片４のうち第１の折返片用切目線４１ａにより形成された先端縁は、下側の包装箱１の支柱板９３の内表面側の上端部で係止され、折返片４のうち各第２の折返片用切目線４１ｂにより形成された先端縁は、下側の包装箱１の第１側板７及び第２側板８（内壁部９）の内表面側の上端部にそれぞれ係止される。 Further, as shown in FIG. 7, in the packaging box 1, the area surrounded by the first side plate 7, the second side plate 8 and the support plate 93 in plan view is a substantially right-angled isosceles triangle having the support plate 93 as the hypotenuse. Since they are formed, the inner surface of the first side plate 7 and the inner surface of the support plate 93, and the inner surface of the support plate 93 and the inner surface of the second side plate 8 are connected at approximately 135°. On the other hand, in the folded piece 4, the leading edge formed by the first folded piece cut line 41a is 135° with respect to the leading edge formed by each second folded piece cut line 41b. It is bent. Further, since the length of the first folded piece cut line 41a and the length of the support plate 93 (the length from the base end to the tip) are substantially the same, the first folded piece of the folded pieces 4 is the same. The front edge formed by the score line 41a is locked at the upper end on the inner surface side of the support plate 93 of the lower packaging box 1, and the second score line 41b for each second folding piece of the folding piece 4 is used. The formed leading edges are respectively locked to the upper end portions on the inner surface side of the first side plate 7 and the second side plate 8 (inner wall portion 9) of the lower packaging box 1.

よって、上下の包装箱１は、折返片４ごとに３箇所、合計１２箇所で係止されるため、上下の包装箱のずれ防止をより確実に図ることができる。 Therefore, since the upper and lower packaging boxes 1 are locked at three locations for each folding piece 4, a total of 12 locations, it is possible to more reliably prevent the upper and lower packaging boxes from shifting.

また、包装箱１は、蓋係止部８５が箱体の内方に向かって水平方向に延出されているため、蓋板２０を包装箱１の内部に挿入して上面を閉塞させたときに、蓋板２０が誤って外れることを防止することができる。また、包装箱１は、この蓋係止部８５が対向する方向と直交する方向に一対の凹部７２が形成されているため、凹部７２から手指を挿入することで、蓋係止部８５を設けても蓋板２０を取り外しやすい。 Further, since the lid locking portion 85 of the packaging box 1 extends horizontally toward the inside of the box body, when the lid plate 20 is inserted into the packaging box 1 and the upper surface is closed. In addition, it is possible to prevent the cover plate 20 from being accidentally removed. Further, since the packaging box 1 has the pair of recesses 72 formed in the direction orthogonal to the direction in which the lid locking portions 85 face each other, the lid locking portions 85 are provided by inserting fingers from the recessed portions 72. However, the lid plate 20 can be easily removed.

以上説明した包装箱１は、ヨーグルトクレートなどと呼ばれるプラスチック製の食品コンテナに換えて使用するのに、好適である。 The packaging box 1 described above is suitable for use in place of a plastic food container called yogurt crate.

以下、本実施形態の変形例を説明する。 Hereinafter, modified examples of the present embodiment will be described.

本実施形態では、有底四角筒状の包装箱１を例に説明したが、包装箱は、有底筒状であれば、何角形でもよく円筒状であってもよい。 In the present embodiment, the packaging box 1 having a bottomed square tubular shape has been described as an example, but the packaging box may have any shape such as a polygonal shape or a cylindrical shape as long as it has a bottomed tubular shape.

本実施形態では、六角形状の折返片４を例に説明したが、折返片は、底板部２の裏面側に突出できれば足りるため、第１折目線５の両端を繋ぐ屈曲状または湾曲状の切れ目によって形成すれば形状は問わない。例えば、折返片の先端縁を９０°に形成しておき、第１側板７及び第２側板８に接するように形成することもできる。また、折返片の先端縁から折目線を介して舌片をさらに連設しておき、包装箱を積み重ねる際に、該折目線で舌片を谷折りしながら、下側の包装箱に積み重ねて、舌片も側壁部３の内表面に接触させることで上下の包装箱のずれ防止を図ることもできる。あるいは、舌片を山折りに折り返すことで折返片４の厚みを増すこともでき、さらには、舌片を山折りに折り曲げ底板部２に一部差し込むことで折返片を脚状にすることもできる。 In the present embodiment, the hexagonal folded piece 4 has been described as an example, but since the folded piece need only project to the back surface side of the bottom plate portion 2, a bent or curved cut that connects both ends of the first fold line 5 is provided. The shape does not matter as long as it is formed by. For example, the tip edge of the folded piece may be formed at 90° so as to be in contact with the first side plate 7 and the second side plate 8. Further, the tongue pieces are further connected in series from the tip edge of the folded piece through the fold line, and when stacking the packaging boxes, the tongue pieces are folded in a valley at the fold line and stacked on the lower packaging box. It is also possible to prevent the upper and lower packaging boxes from shifting by bringing the tongue piece into contact with the inner surface of the side wall portion 3. Alternatively, the thickness of the folding piece 4 can be increased by folding the tongue piece in a mountain fold, and further, the folding piece can be formed into a leg shape by folding the tongue piece in a mountain fold and partially inserting it in the bottom plate portion 2. it can.

また、本実施形態では、底板部２の四隅に折返片４が形成されたものを例に説明したが、係止部は、下側に積み重ねられた包装箱の側壁部３に係止できるものであれば、位置及び個数は問わない。 Further, in the present embodiment, the case where the folding pieces 4 are formed at the four corners of the bottom plate portion 2 has been described as an example, but the locking portion can be locked to the side wall portions 3 of the packaging boxes stacked below. If so, the position and the number are not limited.

本実施形態では、折返片４に係止片６が一体に形成されたものを例に説明したが、係止片は、上述した舌片のように折返片４の先端縁に折目線を介して連設し、該折目線で折り曲げて底板部２に差し込むことで折返片４を係止することもできる。 In the present embodiment, the case where the locking piece 6 is integrally formed with the folding piece 4 has been described as an example, but the locking piece has a fold line at the tip edge of the folding piece 4 like the tongue described above. It is also possible to lock the folded-back piece 4 by arranging the folded-back piece 4 in a continuous manner, bending it along the fold line and inserting it into the bottom plate portion 2.

本実施形態では、略台形状の係止片６を例に説明したが、係止片は、折返片４の長さよりも若干長く、かつ、折返開口部の周縁部を通過できればどのような形状であってもよい。 In the present embodiment, the substantially trapezoidal locking piece 6 has been described as an example, but the locking piece has a shape that is slightly longer than the length of the folding piece 4 and can pass through the peripheral portion of the folding opening. May be

この点について、図８に示した変形例を用いて説明を加える。 This point will be described with reference to the modified example shown in FIG.

図８に示すように、折返片４’は、第１の折返片用切目線４１ａの中間に、逆Ｕ字状の第４の折返片用切目線４１ｄを形成することもできる。このとき、係止片６の長さは、折返片４の第１の折返片用切目線４１ａまでの長さよりも若干長く、かつ、折返片４の第４の折返片用切目線４１ｄまでの長さよりも小である。 As shown in FIG. 8, the folded piece 4 ′ may have an inverted U-shaped fourth folded piece cut line 41 d in the middle of the first folded piece cut line 41 a. At this time, the length of the locking piece 6 is slightly longer than the length of the folding piece 4 up to the first folding line cutting line 41a, and the length of the folding piece 4 up to the fourth folding line cutting line 41d. It is smaller than the length.

この変形例によれば、折返片４’を底板部２の裏面に折り返すことで、係止片６は、折返片４’が遊離した折返開口部４２の周縁部に接する。このとき、変形例の係止片６を第１折目線５に直交する仮想線を軸として回転させるように捻ることで、係止片６は、折返開口部４２のうち第４の折返片用切目線４１ｄに対応する周縁部を通過することができる。 According to this modification, by folding back the folding piece 4 ′ on the back surface of the bottom plate portion 2, the locking piece 6 comes into contact with the peripheral edge portion of the folding opening 42 where the folding piece 4 ′ is released. At this time, by twisting the locking piece 6 of the modified example so as to rotate about an imaginary line orthogonal to the first fold line 5, the locking piece 6 is used for the fourth folding piece of the folding opening 42. It can pass through the peripheral portion corresponding to the score line 41d.

したがって、この変形例によれば、係止片６を大きく撓性変形させることなく、折返開口部４２を通過させることができる。 Therefore, according to this modification, it is possible to allow the locking piece 6 to pass through the folding opening 42 without largely deforming flexibly.

以上説明したとおり、第１折目線５を繋ぐ仮想線からの距離を対比する際に、係止片は、その横幅のうちいずれかの領域に、この横幅に対応する範囲における折返片の長さよりも若干長い部分があれば足り、横幅全域において折返片よりも長い必要はない。 As described above, when comparing the distance from the imaginary line that connects the first fold lines 5, the locking piece has a width in any one of its lateral widths that is larger than the length of the folded piece in the range corresponding to this horizontal width. Also, it is sufficient if there is a slightly long portion, and it does not need to be longer than the folded piece over the entire width.

また、本実施形態では、一の折返片４に対して一の係止片６が形成されたものを例に説明したが、一の折返片４を複数の係止片６で係止してもよく、複数の折返片４を一の係止片６で係止してもよい。この変更に伴い、第１折目線５の個数を２個（一対）から変更することもできる。 Further, in the present embodiment, the case where one locking piece 6 is formed for one folding piece 4 has been described as an example, but one folding piece 4 is locked by a plurality of locking pieces 6. Alternatively, the plurality of folding pieces 4 may be locked by one locking piece 6. With this change, the number of first fold lines 5 can be changed from two (one pair).

また、係止片６は省略することもでき、この場合は、折返片４を１個の第１折目線５で底板部２の裏面側に折り返して接着することが好ましい。 Further, the locking piece 6 may be omitted, and in this case, it is preferable that the folding piece 4 is folded back and adhered to the back surface side of the bottom plate portion 2 with one first fold line 5.

本実施形態では、底板部２の隣接する端縁から所定の間隔を存するとともに、該隣接する端縁のそれぞれに対して約４５°をなす角度で断続的に一対形成された第１折目線５を例に説明したが、上述したとおり、第１折目線５の個数は折返片４及び係止片６の個数に合わせて適宜変更することができる。また、第１折目線５を設ける方向も、例えば、第１側板７や第２側板８に沿って形成することもできる。 In the present embodiment, the first fold line 5 is formed at a predetermined interval from the adjacent edges of the bottom plate portion 2 and is intermittently formed in pairs at an angle of about 45° with respect to each of the adjacent edges. However, as described above, the number of the first fold lines 5 can be appropriately changed according to the number of the folding pieces 4 and the locking pieces 6. Further, the direction in which the first fold line 5 is provided can also be formed, for example, along the first side plate 7 or the second side plate 8.

本実施形態では、枠片部８３及び内壁部９を有する組立式の包装箱を例に説明したが、本発明はこれに限られず、連設された接着片で接着することで、底板部２や側壁部３を形成・組み立ててもよい。 In the present embodiment, the assembly-type packaging box having the frame piece portion 83 and the inner wall portion 9 has been described as an example, but the present invention is not limited to this, and the bottom plate portion 2 can be formed by adhering with a continuous adhesive piece. Alternatively, the side wall portion 3 may be formed and assembled.

本実施形態では、内壁部９に支柱板９３が連設されたものを例に説明したが、支柱板９３はなくてもよい。 In the present embodiment, the case where the support plate 93 is continuously provided on the inner wall portion 9 has been described as an example, but the support plate 93 may be omitted.

また、本実施形態では、支柱板９３にほぼ同形状の補強片９４が連設されたものを例に説明したが、補強片９４は省略してもよく、あるいは、補強片の長さ（基端から先端の長さ）を第２側板８の横幅から内壁部９の横幅を減じた長さの半分としたうえで、１個または２個、それぞれ折目線を介して連設して、４５°、９０°の順で折り曲げることで、側壁部３の隅部に接触させて三角筒状の柱部を形成することもできる。 Further, in the present embodiment, the case where the reinforcing piece 94 having substantially the same shape is continuously provided on the support plate 93 has been described as an example, but the reinforcing piece 94 may be omitted, or the length (base) of the reinforcing piece may be omitted. (The length from the end to the tip) is set to half the length obtained by subtracting the width of the inner wall portion 9 from the width of the second side plate 8, and one or two pieces are continuously provided through the crease lines, and 45 By bending in the order of 90° and 90°, it is also possible to form a triangular cylindrical columnar portion in contact with the corner portion of the side wall portion 3.

１包装箱
２底板部
３側壁部
４折返片
４１折返片用切目線
４２折返開口部（開口部）
５第１折目線
６係止片
６１係止片用切目線
７第１側板（側板）
８第２側板（側板）
９３支柱板 1 Packaging Box 2 Bottom Plate 3 Sidewall 4 Folding Piece 41 Folding Piece Cut Line 42 Folding Opening (Opening)
5 First fold line 6 Locking piece 61 Cut line 7 for locking piece 1st side plate (side plate)
8 Second side plate (side plate)
93 Support plate

Claims

底板部の周縁に側壁部が立設された有底筒状の紙製の包装箱であって、
前記底板部には、第１折目線と該第１折目線の両端を繋ぐ屈曲状または湾曲状の折返片用切目線とで囲まれる折返片が設けられていることを特徴とする包装箱。 A bottomed tubular paper packaging box in which a side wall is erected on the periphery of the bottom plate,
A packaging box, wherein the bottom plate portion is provided with a folding piece surrounded by a first fold line and a bent or curved cut line for the folding piece that connects both ends of the first fold line.

請求項１に記載の包装箱において、
前記第１折目線は断続的に形成され、
隣接する前記第１折目線の間には、該隣接する前記第１折目線を繋ぐ仮想線と、該隣接する前記第１折目線の端部を繋ぎ該仮想線を挟んで前記折返片用切目線の反対側に向かって凸状の係止片用切目線とで囲まれる係止片が設けられ、
前記係止片の基端から先端までの長さは、前記仮想線を対象軸とする線対称位置の前記折返片の基端から先端までの長さより大であるとともに、厚み方向に沿って該係止片を撓曲変形させることで前記底板部から前記折返片が遊離することで該底板部に該遊離片の形状に対応して形成される開口部を通過可能な長さであることを特徴とする包装箱。 The packaging box according to claim 1,
The first fold line is formed intermittently,
Between the first fold lines that are adjacent to each other, a virtual line that connects the first fold lines that are adjacent to each other, and an end portion of the first fold line that is adjacent to the first fold line are connected to each other. A locking piece surrounded by a convex cut line for a locking piece is provided toward the opposite side of the line of sight,
The length from the base end to the tip of the locking piece is larger than the length from the base end to the tip of the folded piece at the line symmetrical position with the virtual line as the target axis, and the length along the thickness direction When the locking piece is flexibly deformed, the folded piece is released from the bottom plate portion, so that the length is such that it can pass through the opening formed in the bottom plate portion corresponding to the shape of the released piece. Characteristic packaging box.

請求項１または２に記載の包装箱において、
前記側壁部は複数の側板が順次連接されることで角筒状に形成され、
前記折返片の周縁は、隣接する前記側板の上端部内面側にそれぞれ係止されることを特徴とする包装箱。 The packaging box according to claim 1 or 2,
The side wall portion is formed in a rectangular tube shape by sequentially connecting a plurality of side plates,
The packaging box is characterized in that the periphery of the folded piece is locked to the inner surface of the upper end of the adjacent side plate.

請求項３に記載の包装箱において、
前記隣接する側板の境界には、該隣接する側板の内面を繋ぐ支柱板が前記側壁部の軸線に沿って延設され、
前記折返片の周縁は、前記支柱板の上端部内面側に係止されることを特徴とする包装箱。 The packaging box according to claim 3,
At the boundary between the adjacent side plates, a support plate connecting the inner surfaces of the adjacent side plates is provided along the axis of the side wall portion,
The packaging box, wherein a peripheral edge of the folded piece is locked to an inner surface of an upper end portion of the support plate.