JP3241255U

JP3241255U - packaging box

Info

Publication number: JP3241255U
Application number: JP2023000130U
Authority: JP
Inventors: 耕太郎長原; 真石谷; 大地古屋
Original assignee: Rengo Co Ltd
Current assignee: Rengo Co Ltd
Priority date: 2023-01-17
Filing date: 2023-01-17
Publication date: 2023-03-14
Anticipated expiration: 2033-01-17

Abstract

【課題】折り畳んだ状態で安定して平積みすることができる包装箱を提供する。【解決手段】包装箱１は、筒状の筒体Ｗの開口部を閉じるための一対の内フラップ１４Ａ，１４Ｂ、および一対の外フラップ１５Ａ，１５Ｂと、筒体Ｗを二重に折り畳んだ折畳状態Ｓ１を維持するロック部３０と、を備えている。ロック部３０は、内フラップ１４Ａに形成される切欠き部３１と、外フラップ１５Ａに形成される係合片３２と、を有し、係合片３２は、外フラップ１５Ａに連設される係合額部３３と、係合額部３３に連設される係合本体部３４と、係合本体部３４の両側端に連設される一対の係合羽根部３５と、を有し、折畳状態Ｓ１において、係合額部３３は、切欠き部３１の基端側の断面に重なり、係合本体部３４は、内フラップ１４Ａの表面に対向し、一対の係合羽根部３５は、一対の返し部３６を切欠き部３１の両側縁部３１Ａ，３１Ｂに係合させる。【選択図】図６A packaging box that can be stably stacked flat in a folded state is provided. A packaging box (1) includes a pair of inner flaps (14A, 14B) and a pair of outer flaps (15A, 15B) for closing an opening of a tubular body (W), and a folding flap (1) by folding the tubular body (W) in two. and a lock portion 30 that maintains the folded state S1. The lock portion 30 has a notch portion 31 formed in the inner flap 14A and an engaging piece 32 formed in the outer flap 15A. The engaging piece 32 is connected to the outer flap 15A. It has a joint frame portion 33, an engaging body portion 34 connected to the engaging frame portion 33, and a pair of engaging blade portions 35 connected to both side ends of the engaging body portion 34, and is folded. In state S1, the engaging forehead portion 33 overlaps the cross section of the notch portion 31 on the proximal end side, the engaging body portion 34 faces the surface of the inner flap 14A, and the pair of engaging vane portions 35 The return portion 36 is engaged with both side edge portions 31A and 31B of the notch portion 31 . [Selection drawing] Fig. 6

Description

本考案は、包装箱に関する。 The present invention relates to a packaging box.

嵩張らないように折り畳んだ状態で容易に廃棄できる折畳ロック付き段ボール箱が知られている（特許文献１）。この段ボール箱は、全フラップを開き、周壁の対角に位置する稜線に沿って二重に折り畳んだ後、一方の長面のフラップに入れた折目線に沿って四重に折り畳まれる。ロック機構は、長面の一対のフラップに設けられた２つの係合片と、間に挟まれる短面のフラップに切り欠かれた切欠部と、を有している。一方の係合片は、左右の扉片が中央から両側に開くように構成され、他方の係合片は、切欠部を通過して左右の扉片を開きながら押し込まれ、下方を向くように折り返されると、フラップから突き出すように開かれた左右の扉片の下端に係合する。これにより、段ボール箱が四重に折り畳まれた状態に維持される。 There is known a corrugated cardboard box with a folding lock that can be easily discarded in a folded state so as not to be bulky (Patent Document 1). This corrugated cardboard box is double-folded along the diagonal ridgelines of the peripheral wall with all the flaps open, and then folded quadruple-fold along the crease lines in one of the longer side flaps. The lock mechanism has two engaging pieces provided on a pair of long flaps and a notch cut in the short flap sandwiched between them. One engaging piece is configured so that the left and right door pieces open from the center to both sides, and the other engaging piece passes through the notch and is pushed in while opening the left and right door pieces so that it faces downward. When folded back, it engages with the lower ends of the left and right door pieces that are opened to protrude from the flap. As a result, the cardboard box is maintained in a quadruple-folded state.

特開２００７－１６８８３５号公報JP 2007-168835 A

しかしながら、上記した折畳ロック付き段ボール箱では、左右の扉片がフラップの表面から突き出すように開かれているため、突き出した扉片が邪魔になり、四重に折り畳まれた複数の段ボール箱を平積みした際に安定しないという問題があった。 However, in the cardboard box with the folding lock described above, the left and right door pieces are opened so as to protrude from the surface of the flap. There was a problem that it was not stable when stacked flat.

本考案は、上記事情を考慮し、折り畳んだ状態で安定して平積みすることができる包装箱を提供する。 In view of the above circumstances, the present invention provides a packaging box that can be stably stacked flat in a folded state.

本考案に係る包装箱は、一対の第１側壁と一対の第２側壁とを交互に連ねて筒状に形成される筒体と、前記筒体の開口部を閉じるために一対の前記第１側壁に連設される一対の第１フラップと、前記筒体の開口部を閉じるために一対の前記第２側壁に連設される一対の第２フラップと、一対の前記第１フラップと一対の前記第２フラップとを開き、前記筒体を対角に位置する稜線で二重に折り畳んだ折畳状態を維持するロック部と、を備え、前記ロック部は、一対の前記第１フラップの少なくとも何れか一方の自由端側の一部を切り欠くことで形成される切欠き部と、前記折畳状態で前記切欠き部に対向するように、一対の前記第２フラップの少なくとも何れか一方の自由端から基端に向かって一対の切断線を入れることで形成される係合片と、を有し、前記係合片は、前記第２フラップに第１折返し線を介して連設され、前記切欠き部に進入可能に形成される係合額部と、前記係合額部に第２折返し線を介して連設され、前記切欠き部を通過可能、且つ基端から自由端に向かって幅狭くなる三角形状または台形状に形成される係合本体部と、前記係合本体部の両側端に逆折り線を介して連設され、前記係合額部の側に突出する一対の返し部を含む一対の係合羽根部と、を有し、前記折畳状態において、前記係合額部は、前記第１折返し線で正折りされて前記切欠き部に進入し、前記切欠き部の基端側の断面に重なり、前記係合額部の正折りに伴って、一対の前記係合羽根部は、前記逆折り線で逆折りされながら前記係合本体部と共に前記切欠き部を通過し、前記切欠き部を通過した前記係合本体部は、前記第２折返し線で正折りされて前記第１フラップの表面に対向し、前記切欠き部を通過した一対の前記係合羽根部は、前記逆折り線まわりの復元力で開かれ、前記係合額部よりも前記第１フラップの自由端側に突出した一対の前記返し部を前記切欠き部の両側縁部に係合させる。 A packaging box according to the present invention comprises a cylindrical body formed by alternately connecting a pair of first side walls and a pair of second side walls, and a pair of the first side walls for closing an opening of the cylindrical body. A pair of first flaps connected to the side walls, a pair of second flaps connected to the pair of second side walls to close the opening of the cylinder, and a pair of the first flaps and a pair of a locking portion that opens the second flap and maintains a folded state in which the cylindrical body is double-folded on diagonally positioned ridges, wherein the locking portion is at least one of the pair of first flaps A notch formed by notching a part of one of the free ends, and at least one of the pair of second flaps so as to face the notch in the folded state. and an engaging piece formed by inserting a pair of cutting lines from the free end toward the proximal end, the engaging piece being connected to the second flap via a first folding line, an engaging forehead portion formed so as to be able to enter into the notch portion; and a pair of engaging body portions which are formed in a triangular or trapezoidal shape with a narrower width, and a pair of engaging body portions which are connected to both side ends of the engaging body portion via reverse fold lines and protrude toward the engaging forehead side. and a pair of engaging blade portions including a folded portion, and in the folded state, the engaging forehead portion is forwardly folded along the first folding line and enters the notch portion to reach the notch portion. As the engaging forehead is folded forward, the pair of engaging blades pass through the notch together with the engaging main body while being reversely folded along the reverse folding line. The engaging main body that has passed through the notch is positively folded along the second folding line and faces the surface of the first flap, and the pair of engaging blades that have passed through the notch are , the pair of return portions which are opened by the restoring force around the reverse folding line and protrude toward the free end side of the first flap from the engagement frame portion are engaged with both side edge portions of the notch portion.

この場合、前記第２側壁および前記第２フラップは、前記第１側壁および前記第１フラップよりも横方向に長く形成され、前記切欠き部は、前記第１フラップの角部を切り欠くことで形成され、前記折畳状態において、一対の前記返し部は、前記切欠き部の一方の側縁部を形成する前記第１フラップと、前記切欠き部の他方の側縁部を形成するように前記切欠き部に隣接する前記第２フラップと、に係合するとよい。 In this case, the second side wall and the second flap are laterally longer than the first side wall and the first flap, and the notch is formed by notching a corner of the first flap. formed, and in the folded state, the pair of return portions form the first flap forming one side edge of the notch and the other side edge of the notch and the second flap adjacent to the notch.

この場合、一対の前記第１側壁と一対の前記第２側壁とは、交互に一列に並設され、両端に位置する前記第１側壁と前記第２側壁とを接合することで前記筒体を形成し、前記切欠き部は、前記第２側壁と接合される前記第１側壁とは異なる他の前記第１側壁に連設された前記第１フラップに形成されてもよい。 In this case, the pair of first side walls and the pair of second side walls are alternately arranged in a row, and the first side walls and the second side walls located at both ends are joined to form the cylindrical body. The notch may be formed in the first flap connected to another first side wall different from the first side wall joined to the second side wall.

この場合、前記第１折返し線は、１つ以上の切目を含み、前記第２折返し線よりも折れ易く形成されてもよい。 In this case, the first folding line may include one or more cuts and be formed to be easier to fold than the second folding line.

この場合、一対の前記係合羽根部は、全体として、基端から自由端に向かって幅狭くなる台形状に形成され、一対の前記係合羽根部の自由端側は、前記逆折り線で折れずとも、前記切欠き部を通過可能な幅に形成されてもよい。 In this case, the pair of engaging blades is generally formed in a trapezoidal shape that narrows from the base end toward the free end, and the free end sides of the pair of engaging blades are not bent along the reverse folding line. Both of them may be formed to have a width that allows them to pass through the notch.

本考案によれば、包装箱を折り畳んだ状態で安定して平積みすることができる。 According to the present invention, the packaging boxes can be stably and flatly stacked in a folded state.

本考案の一実施形態に係る包装箱を示す斜視図である。1 is a perspective view of a packaging box according to an embodiment of the present invention; FIG. 本考案の一実施形態に係る包装箱のブランクを示す平面図である。1 is a plan view showing a blank of a packaging box according to one embodiment of the present invention; FIG. 本考案の一実施形態に係る包装箱のブランクの一部（係合片）を拡大して示す平面図である。It is a top view which expands and shows a part (engagement piece) of the blank of the packaging box which concerns on one Embodiment of this invention. 本考案の一実施形態に係る包装箱を二重に折り畳んだ状態を示す斜視図である。1 is a perspective view showing a double-folded packaging box according to an embodiment of the present invention; FIG. 本考案の一実施形態に係る包装箱を折畳状態にロックする過程を示す斜視図である。FIG. 4 is a perspective view showing a process of locking a packaging box in a folded state according to an embodiment of the present invention; 本考案の一実施形態に係る包装箱であって、折畳状態にロックした包装箱を示す斜視図である。1 is a perspective view of a packaging box according to an embodiment of the present invention, which is locked in a folded state; FIG. 本考案の一実施形態に係る包装箱であって、折畳状態にロックした包装箱の一部を示す断面図である。1 is a cross-sectional view of a part of a packaging box locked in a folded state, according to an embodiment of the present invention; FIG. 本考案の一実施形態の変型例に係る包装箱のブランクを示す平面図である。FIG. 5 is a plan view showing a blank of a packaging box according to a modification of one embodiment of the present invention; 本考案の一実施形態の他の変型例に係る包装箱のブランクの一部（係合片）を拡大して示す平面図である。It is a top view which expands and shows a part (engagement piece) of the blanks of the packaging box based on the other modification of one Embodiment of this invention.

以下、添付の図面を参照しつつ、本考案の実施形態について説明する。なお、本明細書では、主に包装箱を使用する際の方向や位置を基準にして説明することとし、方向や位置を示す用語は、説明の便宜のために用いるものであって、本考案の技術的範囲を限定するものではない。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that in this specification, the description will be based mainly on the direction and position when using the packaging box, and the terms indicating the direction and position are used for convenience of explanation, and the present invention does not limit the technical scope of

図１および図２を参照して、本実施形態に係る包装箱１について説明する。図１は包装箱１を示す斜視図である。図２は包装箱１のブランク１Ａを示す平面図である。 A packaging box 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a perspective view showing a packaging box 1. FIG. FIG. 2 is a plan view showing the blank 1A of the packaging box 1. FIG.

図１に示すように、包装箱１は、一対の第１側壁１０Ａ，１０Ｂと一対の第２側壁１１Ａ，１１Ｂとを周方向に交互に連ねて略四角筒状に形成される筒体Ｗの上下両端面を閉塞して略直方体状に形成されている。包装箱１は、図２に示すブランク１Ａを組み立てることで形成される。ブランク１Ａは、１枚の紙製の段ボールシートを抜型等で打ち抜いて形成されている。段ボールシートは、例えば、波状の中しん９Ａに表ライナ９Ｂと裏ライナ（図示せず）とを貼り合せた両面段ボールシートである。なお、図２等は、表ライナ９Ｂ側（包装箱１の外面）を示している。本明細書では、段ボールシートの中しん９Ａと平行な方向を「段方向」と呼び、段方向に直交する方向を「流れ方向」と呼ぶこととする。図面に示す「Ｘ」は「段方向」を示し、「Ｙ」は「流れ方向」を示している。 As shown in FIG. 1, the packaging box 1 has a cylindrical body W formed in a substantially square cylindrical shape by alternately connecting a pair of first side walls 10A and 10B and a pair of second side walls 11A and 11B in the circumferential direction. It is formed in a substantially rectangular parallelepiped shape with its upper and lower end faces closed. The packaging box 1 is formed by assembling blanks 1A shown in FIG. The blank 1A is formed by punching out a cardboard sheet made of paper with a die or the like. The corrugated cardboard sheet is, for example, a double-faced corrugated board sheet in which a front liner 9B and a back liner (not shown) are bonded to a corrugated medium 9A. 2 and the like show the front liner 9B side (the outer surface of the packaging box 1). In this specification, the direction parallel to the core 9A of the corrugated cardboard sheet is called the "corrugation direction", and the direction orthogonal to the corrugation direction is called the "flow direction". The "X" shown in the drawings indicates the "row direction", and the "Y" indicates the "flow direction".

［ブランク］
図２に示すように、ブランク１Ａは、一対の第１側壁１０Ａ，１０Ｂと、一対の第２側壁１１Ａ，１１Ｂと、一対の第１底壁１２Ａ，１２Ｂと、一対の第２底壁１３Ａ，１３Ｂと、一対の内フラップ１４Ａ，１４Ｂと、一対の外フラップ１５Ａ，１５Ｂと、を備えている。なお、一対の第１側壁１０Ａ，１０Ｂは、概ね同一形状であるため、本明細書では、特に明記した場合を除いて、１つの第１側壁１０について説明し、符号に算用数字のみを付す。これと同様に、本明細書では、第２側壁１１、第１底壁１２、第２底壁１３、内フラップ１４および外フラップ１５についても、それぞれ１つの構成（部位）について説明し、符号に算用数字のみを付す。 [blank]
As shown in FIG. 2, the blank 1A includes a pair of first side walls 10A, 10B, a pair of second side walls 11A, 11B, a pair of first bottom walls 12A, 12B, a pair of second bottom walls 13A, 13B, a pair of inner flaps 14A and 14B, and a pair of outer flaps 15A and 15B. In addition, since the pair of first side walls 10A and 10B have substantially the same shape, in this specification, unless otherwise specified, one first side wall 10 will be described, and only Arabic numerals will be attached to the reference numerals. . Similarly, in this specification, each of the second side wall 11, the first bottom wall 12, the second bottom wall 13, the inner flap 14, and the outer flap 15 will be described with respect to one configuration (part), and Add only arithmetic numerals.

＜第１側壁、第２側壁＞
一対の第１側壁１０Ａ，１０Ｂと一対の第２側壁１１Ａ，１１Ｂとは、交互に流れ方向（一列）に並設され、第１折曲線Ｌ１を介して連設されている。第１側壁１０と第２側壁１１とは、略長方形状に形成されている。詳細には、第２側壁１１は、第１側壁１０よりも流れ方向（横方向）に長く形成されている。第２側壁１１Ａの流れ方向の自由端には、第１折曲線Ｌ１を介して継代片１７が連設されている。 <First side wall, second side wall>
The pair of first side walls 10A, 10B and the pair of second side walls 11A, 11B are alternately arranged in parallel in the flow direction (in one row) and connected via a first folding line L1. The first side wall 10 and the second side wall 11 are formed in a substantially rectangular shape. Specifically, the second side wall 11 is formed longer than the first side wall 10 in the flow direction (horizontal direction). A free end of the second side wall 11A in the flow direction is connected with a passage piece 17 via a first folding line L1.

＜第１底壁＞
第１底壁１２は、第２折曲線Ｌ２を介して第１側壁１０の段方向の一端（下端）に連設されている。第１底壁１２は基端から先端に向かって徐々に先細る略台形状に形成されている。第１底壁１２の段方向の寸法（延出寸法）は、第１側壁１０の流れ方向の寸法の半分よりも若干長く設定されている。 <First bottom wall>
The first bottom wall 12 is connected to one end (lower end) of the first side wall 10 in the step direction via the second folding line L2. The first bottom wall 12 is formed in a substantially trapezoidal shape that gradually tapers from the proximal end to the distal end. The dimension (extending dimension) of the first bottom wall 12 in the step direction is set slightly longer than half the dimension of the first side wall 10 in the flow direction.

＜第２底壁＞
第２底壁１３は、第２折曲線Ｌ２を介して第２側壁１１の段方向の一端（下端）に連設されている。第２底壁１３は概ね長方形状に形成され、第２底壁１３の段方向の寸法（延出寸法）は第１底壁１２の延出寸法と同一である。第２底壁１３の先端側には、噛合凹部２０が略台形状に切り欠かれている。第２底壁１３には、噛合凹部２０から第２底壁１３の角部に向かって傾斜折線Ｌ４が斜めに形成され、傾斜折線Ｌ４によって略三角形状の底接着部２１が区画されている。なお、傾斜折線Ｌ４の中間部には、底接着部２１を折れ易くするために分断線２２が形成されている。 <Second bottom wall>
The second bottom wall 13 is connected to one end (lower end) of the second side wall 11 in the step direction via the second folding line L2. The second bottom wall 13 is formed in a generally rectangular shape, and the stepwise dimension (extending dimension) of the second bottom wall 13 is the same as the extending dimension of the first bottom wall 12 . An engaging concave portion 20 is cut out in a substantially trapezoidal shape on the tip side of the second bottom wall 13 . In the second bottom wall 13, an inclined folding line L4 is formed obliquely from the engaging recess 20 toward the corner of the second bottom wall 13, and the substantially triangular bottom bonding portion 21 is defined by the inclined folding line L4. A parting line 22 is formed in the middle of the inclined folding line L4 to make the bottom adhesive part 21 easy to break.

＜内フラップ、外フラップ＞
第１フラップの一例としての内フラップ１４は、第３折曲線Ｌ３を介して第１側壁１０の段方向の他端（上端）に連設されている。内フラップ１４は概ね長方形状に形成され、内フラップ１４の段方向の寸法（延出寸法）は第１側壁１０の流れ方向の寸法の略半分に設定されている。第２フラップの一例としての外フラップ１５は、第３折曲線Ｌ３を介して第２側壁１１の段方向の他端（上端）に連設されている。外フラップ１５は概ね長方形状に形成され、外フラップ１５の段方向の寸法（延出寸法）は、内フラップ１４の延出寸法と同一である。外フラップ１５は、内フラップ１４よりも流れ方向（横方向）に長く形成されている。一対の内フラップ１４Ａ，１４Ｂおよび一対の外フラップ１５Ａ，１５Ｂは、筒体Ｗの上方の開口部を閉じるために設けられている（図１参照）。 <Inner flap, outer flap>
The inner flap 14 as an example of the first flap is connected to the other end (upper end) of the first side wall 10 in the step direction via the third folding line L3. The inner flap 14 is formed in a substantially rectangular shape, and the stepwise dimension (extending dimension) of the inner flap 14 is set to be approximately half the dimension of the first side wall 10 in the flow direction. The outer flap 15 as an example of the second flap is connected to the other end (upper end) of the second side wall 11 in the step direction via the third folding line L3. The outer flap 15 is formed in a generally rectangular shape, and the stepwise dimension (extending dimension) of the outer flap 15 is the same as the extending dimension of the inner flap 14 . The outer flap 15 is longer than the inner flap 14 in the flow direction (lateral direction). A pair of inner flaps 14A, 14B and a pair of outer flaps 15A, 15B are provided to close the upper opening of the tubular body W (see FIG. 1).

なお、第１～第３折曲線Ｌ１～Ｌ３および傾斜折線Ｌ４は、段ボールシートを裏ライナ側から厚み方向に潰した汎用罫線であるが、これに限らず、複数の切目を所定間隔に形成したミシン目や汎用罫線上にミシン目を形成したリード罫等、段ボールシートを所望の向きに折り曲げるための構造であれば如何なるものでもよい。また、本明細書では、裏ライナを内側に向けるように段ボールシートを折り曲げることを「正折り」と呼び、表ライナ９Ｂを内側に向けるように段ボールシートを折り曲げることを「逆折り」と呼ぶこととする。 The first to third folding lines L1 to L3 and the inclined folding line L4 are general-purpose ruled lines formed by crushing the corrugated cardboard sheet from the back liner side in the thickness direction. Any structure for folding a corrugated cardboard sheet in a desired direction, such as perforations or lead creases in which perforations are formed on general-purpose creases, may be used. Further, in this specification, folding the corrugated cardboard sheet so that the back liner faces inward is called "forward folding", and folding the corrugated cardboard sheet so that the front liner 9B faces inward is called "reverse folding". and

［ロック部］
本実施形態に係る包装箱１には、一対の内フラップ１４Ａ，１４Ｂと一対の外フラップ１５Ａ，１５Ｂとを開き、筒体Ｗを対角に位置する稜線（第１折曲線Ｌ１）で二重に折り畳んだ折畳状態Ｓ１を維持するロック部３０が設けられている。図２および図３を参照して、ロック部３０について説明する。図３はブランク１Ａの一部（係合片３２）を拡大して示す平面図である。 [Lock part]
The packaging box 1 according to the present embodiment has a pair of inner flaps 14A and 14B and a pair of outer flaps 15A and 15B that are opened, and the cylindrical body W is doubled at the diagonally positioned ridge line (first folding line L1). A locking portion 30 is provided to maintain the folded state S1 in which the bag is folded. The lock portion 30 will be described with reference to FIGS. 2 and 3. FIG. FIG. 3 is an enlarged plan view showing a part (engagement piece 32) of the blank 1A.

図２に示すように、ロック部３０は、切欠き部３１と、係合片３２と、を有している。 As shown in FIG. 2 , the locking portion 30 has a cutout portion 31 and an engaging piece 32 .

＜切欠き部＞
図２に示すように、切欠き部３１は、流れ方向の中央側に位置する内フラップ１４Ａの角部（自由端側の一部）を切り欠くことで形成されている。詳細には、切欠き部３１は、外フラップ１５Ｂに隣接する内フラップ１４Ａの先端角部を略長方形状に切り欠くことで形成されている。切欠き部３１は、内フラップ１４Ａに実際に切り欠かれた欠損部分と、欠損部分に隣接する外フラップ１５Ｂの側縁部３１Ｂと、で囲まれる範囲と捉えることもできる。つまり、切欠き部３１の一方の側縁部３１Ａは内フラップ１４Ａに形成され、切欠き部３１の他方の側縁部３１Ｂは外フラップ１５Ｂに形成されている、と捉えることもできる。 <Notch>
As shown in FIG. 2, the notch 31 is formed by notching a corner (part of the free end) of the inner flap 14A located on the center side in the flow direction. Specifically, the notch portion 31 is formed by cutting out a substantially rectangular tip corner portion of the inner flap 14A adjacent to the outer flap 15B. The notch portion 31 can also be regarded as a range surrounded by the cutout portion actually cut out in the inner flap 14A and the side edge portion 31B of the outer flap 15B adjacent to the cutout portion. That is, it can be understood that one side edge 31A of the notch 31 is formed on the inner flap 14A and the other side edge 31B of the notch 31 is formed on the outer flap 15B.

＜係合片＞
図２に示すように、係合片３２は、折畳状態Ｓ１で切欠き部３１に対向するように、外フラップ１５Ａの流れ方向の中央よりも継代片１７の側にずれた位置に略台形状に形成されている。 <Engaging piece>
As shown in FIG. 2, the engagement piece 32 is positioned substantially at a position shifted toward the passage piece 17 from the center of the outer flap 15A in the flow direction so as to face the notch 31 in the folded state S1. It is formed in a trapezoidal shape.

図３に示すように、係合片３２は、外フラップ１５Ａの自由端から基端に向かって一対の切断線４０を入れることで形成されている。一対の切断線４０は、流れ方向に間隔をあけて外フラップ１５Ａの自由端から段方向と略平行に切り込まれた後、僅かな継ぎ目を挟んで、互いに流れ方向に離れるように傾斜しながら基端側に向かって伸長し、基端側で屈曲して互いに接近するように流れ方向と略平行に伸長している。一対の切断線４０の末端（終端）は、後述する係合額部３３を挟んで、互いに離間している。 As shown in FIG. 3, the engaging piece 32 is formed by inserting a pair of cutting lines 40 from the free end of the outer flap 15A toward the proximal end. A pair of cutting lines 40 are cut from the free end of the outer flap 15A at intervals in the flow direction, substantially parallel to the step direction, and then slanted away from each other in the flow direction with a slight seam in between. It extends toward the proximal end side, bends at the proximal end side, and extends substantially parallel to the flow direction so as to approach each other. The ends (terminating ends) of the pair of cutting lines 40 are separated from each other with an engaging forehead portion 33 to be described later interposed therebetween.

各々の切断線４０の末端（終端）には、ニ分岐するように額切目４１と返し切目４２とが連続している。一対の額切目４１は、外フラップ１５Ａの基端側に向かって一対の切断線４０の末端から段方向と略平行に延びている。一対の返し切目４２は、外フラップ１５Ａの先端側に向かって一対の切断線４０の末端から互いに接近するように傾斜しながら延びている。なお、一対の切断線４０、一対の額切目４１および一対の返し切目４２は、それぞれ、図２および図３において左右対称となる形状であるため、本明細書では、特に明記した場合を除いて、それぞれ１つの構成（部位）について説明する。また、本明細書では、額切目４１と返し切目４２とをまとめて説明する場合には、単に「切目４１，４２」と呼ぶこととする。 A forehead cut 41 and a reverse cut 42 are continuous at the end (terminus) of each cutting line 40 so as to branch into two. The pair of forehead cuts 41 extends substantially parallel to the step direction from the ends of the pair of cutting lines 40 toward the base end side of the outer flap 15A. The pair of return cuts 42 extend from the ends of the pair of cutting lines 40 toward the distal end side of the outer flap 15A while being inclined so as to approach each other. Note that the pair of cutting lines 40, the pair of forehead cuts 41, and the pair of back cuts 42 are symmetrical in FIGS. 2 and 3, respectively. , one configuration (part) will be described. Further, in this specification, when the forehead cut 41 and the reverse cut 42 are collectively described, they are simply referred to as "the cuts 41 and 42".

図３に示すように、係合片３２は、係合額部３３と、係合本体部３４と、一対の係合羽根部３５と、を有している。なお、一対の係合羽根部３５は、図２および図３において左右対称となる形状であるため、本明細書では、特に明記した場合を除いて、１つの係合羽根部３５について説明する。 As shown in FIG. 3 , the engaging piece 32 has an engaging forehead portion 33 , an engaging body portion 34 and a pair of engaging blade portions 35 . 2 and 3, the pair of engaging vane portions 35 has a symmetrical shape, so in this specification, unless otherwise specified, one engaging vane portion 35 will be described.

（係合額部）
係合額部３３は、外フラップ１５Ａに第１折返し線Ｌ５を介して連設されている。係合額部３３は、一対の切目４１，４２の間において略長方形状（正確には略六角形状）に形成されている。係合額部３３の流れ方向の寸法は、切欠き部３１の流れ方向の寸法よりも僅かに短く設定されている。つまり、係合額部３３は、切欠き部３１に進入可能に形成されている。なお、額切目４１は、係合額部３３よりも段方向の基端側に延びている。 (engagement forehead)
The engagement forehead portion 33 is connected to the outer flap 15A via a first folding line L5. The engaging forehead portion 33 is formed in a substantially rectangular shape (more precisely, a substantially hexagonal shape) between the pair of cuts 41 and 42 . The size of the engaging forehead portion 33 in the flow direction is set slightly shorter than the size of the notch portion 31 in the flow direction. That is, the engaging forehead portion 33 is formed so as to be able to enter the notch portion 31 . It should be noted that the forehead cut 41 extends from the engagement forehead portion 33 to the base end side in the step direction.

（係合本体部）
係合本体部３４は、係合額部３３（の先端）に第２折返し線Ｌ６を介して連設されている。係合本体部３４は、（段方向の）基端から自由端に向かって（流れ方向に）幅狭くなる三角形状（二等辺三角形状）に形成されている。三角形状の係合本体部３４の底辺の長さは、係合額部３３の先端の幅と同一であるため、係合額部３３と同様に、係合本体部３４は切欠き部３１を通過可能に形成されている。 (engagement body)
The engaging body portion 34 is connected to (the tip of) the engaging forehead portion 33 via a second folding line L6. The engaging body portion 34 is formed in a triangular shape (isosceles triangular shape) whose width narrows from the base end (in the step direction) toward the free end (in the flow direction). Since the length of the base of the triangular engaging main body portion 34 is the same as the width of the tip of the engaging forehead portion 33 , the engaging main body portion 34 has the notch portion 31 in the same manner as the engaging forehead portion 33 . It is formed so that it can pass through.

（係合羽根部）
一対の係合羽根部３５は、係合本体部３４の両側端（流れ方向の両端）に逆折り線Ｌ７を介して連設されている。係合羽根部３５は、切断線４０と逆折り線Ｌ７とで区画された概ね長方形状に形成されており、三角形状の係合本体部３４の斜辺に沿うように傾斜している。詳細には、一対の係合羽根部３５は、全体として、外フラップ１５Ａの基端から自由端に向かって（流れ方向に）幅狭くなる略台形状に形成されている。一対の係合羽根部３５の自由端側の幅（流れ方向の寸法）は、切欠き部３１の流れ方向の寸法と略同一に（または僅かに短く）設定されている。一方で、一対の係合羽根部３５の自由端側を除く部分（傾斜した切断線４０が輪郭を成す部分）の幅は、切欠き部３１の流れ方向の寸法よりも長くなるように設定されている。すなわち、一対の係合羽根部３５の自由端側を除く部分は、逆折り線Ｌ７で折れることで、切欠き部３１を通過可能な幅に形成され、一対の係合羽根部３５の自由端側は、逆折り線Ｌ７で折れずとも、切欠き部３１を通過可能な幅に形成されている。 (engagement vane)
The pair of engaging blade portions 35 are connected to both side ends (both ends in the flow direction) of the engaging body portion 34 via reverse fold lines L7. The engaging blade portion 35 is formed in a substantially rectangular shape defined by the cutting line 40 and the reverse folding line L7, and is inclined along the oblique side of the triangular engaging body portion 34. As shown in FIG. Specifically, the pair of engaging vane portions 35 is generally formed in a substantially trapezoidal shape that narrows (in the flow direction) from the proximal end of the outer flap 15A toward the free end. The width (dimension in the flow direction) of the pair of engaging blades 35 on the free end side is set to be substantially the same (or slightly shorter) than the dimension in the flow direction of the notch 31 . On the other hand, the width of the portion of the pair of engaging blade portions 35 excluding the free end side (the portion where the inclined cutting line 40 forms an outline) is set to be longer than the dimension of the notch portion 31 in the flow direction. there is That is, the portions other than the free end sides of the pair of engaging blade portions 35 are formed to have a width that can pass through the notch portion 31 by folding along the reverse folding line L7, and the free end sides of the pair of engaging blade portions 35 are , and is formed to have a width that allows it to pass through the notch 31 without being bent at the reverse folding line L7.

また、係合羽根部３５は、係合額部３３の側に突出する返し部３６を含んでいる。返し部３６は、係合羽根部３５の基端側の一部であって、切断線４０の基端側と返し切目４２とで囲まれる範囲に形成されている。返し部３６は、返し切目４２を挟んで係合額部３３に隣接している。 Further, the engaging vane portion 35 includes a return portion 36 protruding toward the engaging forehead portion 33 side. The return portion 36 is part of the base end side of the engaging blade portion 35 and is formed in a range surrounded by the base end side of the cutting line 40 and the return cut 42 . The return portion 36 is adjacent to the engagement forehead portion 33 with a return cut 42 interposed therebetween.

なお、第１折返し線Ｌ５および逆折り線Ｌ７は、汎用罫線上にミシン目（複数の切目）を形成したリード罫であり、第２折返し線Ｌ６は、汎用罫線である。第１折返し線Ｌ５は、複数の切目を含み、第２折返し線Ｌ６よりも折れ易く形成されている。第１折返し線Ｌ５と同様に、逆折り線Ｌ７も、第２折返し線Ｌ６よりも折れ易く形成されている。なお、第１折返し線Ｌ５および逆折り線Ｌ７は、１つ以上の切目を含んでいればよい。また、第１折返し線Ｌ５、第２折返し線Ｌ６および逆折り線Ｌ７は、汎用罫線やリード罫に限らず、段ボールシートを所望の向きに折り曲げるための構造であれば如何なるものでもよい。 The first folding line L5 and the reverse folding line L7 are lead creases in which perforations (a plurality of cut lines) are formed on general-purpose creases, and the second folding line L6 is a general-purpose crease. The first folding line L5 includes a plurality of cuts and is formed to be easier to fold than the second folding line L6. Like the first folding line L5, the reverse folding line L7 is also formed to be easier to fold than the second folding line L6. Note that the first folding line L5 and the reverse folding line L7 may include one or more cuts. Further, the first folding line L5, the second folding line L6 and the reverse folding line L7 are not limited to general-purpose creases or lead creases, and may be any structure for folding the corrugated cardboard sheet in a desired direction.

［包装箱の製造］
次に、図４を参照して、包装箱１の製造について簡単に説明する。図４は包装箱１（筒体Ｗ）を二重に折り畳んだ状態（折畳状態Ｓ１）を示す斜視図である。 [Manufacturing of packaging boxes]
Next, with reference to FIG. 4, manufacturing of the packaging box 1 will be briefly described. FIG. 4 is a perspective view showing a state in which the packaging box 1 (cylindrical body W) is double-folded (folded state S1).

包装箱１は、例えば、自動製函機（図示せず）を用いて大量に生産することが可能とされている。自動製函機は、ブランク１Ａを適所で折り曲げたり接着したりすることで、二重に折り畳まれた状態（折畳状態Ｓ１）の包装箱１を製造する。 The packaging box 1 can be mass-produced using, for example, an automatic box making machine (not shown). The automatic box-making machine manufactures the packaging box 1 in a double-folded state (folded state S1) by folding or adhering the blank 1A at an appropriate place.

例えば、自動製函機は、第１底壁１２および第２底壁１３を第２折曲線Ｌ２に沿って内側に折り返し（正折りし）、第２底壁１３の底接着部２１を傾斜折線Ｌ４に沿って逆折りする（図示せず）。自動製函機は、ブランク１Ａの流れ方向の両端に位置する第１側壁１０Ｂと第２側壁１１Ａとを第１折曲線Ｌ１に沿って折り返し（正折りし）、継代片１７を第１側壁１０Ｂの裏面（裏ライナ）に接着し、底接着部２１を第１底壁１２の表面（表ライナ９Ｂ）に接着する。 For example, the automatic box making machine folds (regularly folds) the first bottom wall 12 and the second bottom wall 13 inward along the second folding line L2, and folds the bottom bonding portion 21 of the second bottom wall 13 along the inclined folding line. Reverse fold along L4 (not shown). The automatic box making machine folds (regularly folds) the first side wall 10B and the second side wall 11A located at both ends in the flow direction of the blank 1A along the first folding line L1, and folds the successive piece 17 into the first side wall. 10B, and the bottom adhesive portion 21 is adhered to the surface of the first bottom wall 12 (front liner 9B).

以上によって、二重に折り畳まれた包装箱１が完成する（図４参照）。ブランク１Ａの流れ方向の両端に位置する第１側壁１０Ｂと第２側壁１１Ａとを継代片１７を介して接合することで、一対の第１側壁１０Ａ，１０Ｂと一対の第２側壁１１Ａ，１１Ｂとは周方向に連なって筒体Ｗを形成する。折畳状態Ｓ１では、第１側壁１０Ａ（内フラップ１４Ａ）と第２側壁１１Ｂ（外フラップ１５Ｂ）とが、略同一平面上で隣り合い、第１側壁１０Ｂ（内フラップ１４Ｂ）と第２側壁１１Ａ（外フラップ１５Ａ）とが、第１側壁１０Ａ（内フラップ１４Ａ）と第２側壁１１Ｂ（外フラップ１５Ｂ）とに重なり（対向し）、略同一平面上で隣り合っている。詳細には、第１側壁１０Ｂ（内フラップ１４Ｂ）が第２側壁１１Ｂ（外フラップ１５Ｂ）に対向し、第２側壁１１Ａ（外フラップ１５Ａ）が第１側壁１０Ａ（内フラップ１４Ａ）と第２側壁１１Ｂ（外フラップ１５Ｂ）の一部とに対向している。また、外フラップ１５Ａに形成された係合片３２は、内フラップ１４Ａに形成された切欠き部３１に対向している。 As described above, the double-folded packaging box 1 is completed (see FIG. 4). A pair of first side walls 10A and 10B and a pair of second side walls 11A and 11B are formed by joining the first side wall 10B and the second side wall 11A located at both ends in the flow direction of the blank 1A through the passage piece 17. and form a cylindrical body W connected in the circumferential direction. In the folded state S1, the first side wall 10A (the inner flap 14A) and the second side wall 11B (the outer flap 15B) are adjacent to each other on substantially the same plane, and the first side wall 10B (the inner flap 14B) and the second side wall 11A. (outer flap 15A) overlaps (opposes) the first side wall 10A (inner flap 14A) and the second side wall 11B (outer flap 15B), and are adjacent to each other on substantially the same plane. Specifically, the first side wall 10B (inner flap 14B) faces the second side wall 11B (outer flap 15B), and the second side wall 11A (outer flap 15A) faces the first side wall 10A (inner flap 14A) and the second side wall. It faces a part of 11B (outer flap 15B). Further, the engagement piece 32 formed on the outer flap 15A faces the notch 31 formed on the inner flap 14A.

ところで、自動製函機は、第１側壁１０Ｂや第２側壁１１Ａ等を引っ掛けて折り曲げるためのアーム等を備えている（図示せず）。例えば、第１側壁１０Ｂを折り曲げる場合、アーム等が第１側壁１０Ｂと内フラップ１４Ｂに掛けられることがある。仮に、ブランク１Ａの流れ方向の端に位置する内フラップ１４Ｂに切欠き部３１が形成されている場合、アーム等が切欠き部３１に進入し、第１側壁１０Ｂ等を適正に折り返すことができないことがある。その結果、第１側壁１０Ｂと第２側壁１１Ａ（継代片１７）とがずれた位置で接合される等の問題が発生することがある。 By the way, the automatic box making machine is provided with an arm or the like (not shown) for hooking and bending the first side wall 10B, the second side wall 11A, and the like. For example, when folding the first side wall 10B, an arm or the like may be hooked between the first side wall 10B and the inner flap 14B. If a cutout portion 31 is formed in the inner flap 14B positioned at the end of the blank 1A in the flow direction, the arm or the like enters the cutout portion 31 and the first side wall 10B or the like cannot be properly folded back. Sometimes. As a result, problems such as joining the first side wall 10B and the second side wall 11A (passage piece 17) at shifted positions may occur.

このような問題に対し、本実施形態に係る包装箱１によれば、切欠き部３１が、第２側壁１１Ａと接合される第１側壁１０Ｂとは異なる他の第１側壁１０Ａに連設された内フラップ１４Ａに形成されているため（図２参照）、自動製函機のアーム等が切欠き部３１に進入することが防止される。これにより、第１側壁１０Ｂを適正に折り返すことができ、第１側壁１０Ｂと第２側壁１１Ａとを適正に接合することができる。 In order to address such a problem, according to the packaging box 1 according to the present embodiment, the notch 31 is provided continuously with the first side wall 10A different from the first side wall 10B joined to the second side wall 11A. Moreover, since it is formed on the inner flap 14A (see FIG. 2), the arm of the automatic box making machine or the like is prevented from entering the notch 31. As shown in FIG. Thereby, the first side wall 10B can be properly folded back, and the first side wall 10B and the second side wall 11A can be properly joined.

［包装箱の組立］
次に、包装箱１の組立作業（封緘作業）について簡単に説明する。 [Assembling the packaging box]
Next, the assembly work (sealing work) of the packaging box 1 will be briefly described.

作業者は、一対の第１側壁１０Ａ，１０Ｂと一対の第２側壁１１Ａ，１１Ｂとが略直交するように起こし、折畳状態Ｓ１にされた筒体Ｗを略四角筒状に変形させる（図１参照）。第１底壁１２と第２底壁１３とは、筒体Ｗを四角筒状に変形する過程で、自動的に形成される所謂ワンタッチ底である。筒体Ｗの変形に伴って、内側に折り返された第１底壁１２と第２底壁１３とが、逆折りされた底接着部２１を伸ばしながら下方に押し出され、一対の第２底壁１３Ａ，１３Ｂの噛合凹部２０が互いに噛み合う（図示せず）。これにより、筒体Ｗの下端が閉塞され、包装箱１の底面が形成される（図示せず）。作業者は、筒体Ｗの上方の開口部から商品（図示せず）を筒体Ｗの内部に収容する。 The operator raises the pair of first side walls 10A and 10B and the pair of second side walls 11A and 11B so that they are substantially perpendicular to each other, and deforms the cylindrical body W in the folded state S1 into a substantially square cylindrical shape (Fig. 1). The first bottom wall 12 and the second bottom wall 13 are so-called one-touch bottoms that are automatically formed in the process of deforming the cylindrical body W into a square cylindrical shape. As the cylindrical body W is deformed, the inwardly folded first bottom wall 12 and the second bottom wall 13 are pushed downward while extending the reversely folded bottom bonding portion 21, thereby forming a pair of second bottom walls. The meshing recesses 20 of 13A and 13B mesh with each other (not shown). As a result, the lower end of the cylindrical body W is closed and the bottom surface of the packaging box 1 is formed (not shown). A worker puts a product (not shown) into the cylindrical body W through the upper opening of the cylindrical body W. As shown in FIG.

作業者は、一対の内フラップ１４Ａ，１４Ｂを第３折曲線Ｌ３に沿って内側に折り曲げた後、一対の外フラップ１５Ａ，１５Ｂを第３折曲線Ｌ３に沿って内側に折り曲げ、筒体Ｗの上方の開口部を閉じる（図１参照）。一対の内フラップ１４Ａ，１４Ｂの先端同士は離間し、一対の外フラップ１５Ａ，１５Ｂの先端同士は突き合わされる。作業者は、一対の外フラップ１５Ａ，１５Ｂの突き合わせ部分に沿って粘着テープ（図示せず）を貼り、包装箱１を封緘する。なお、包装箱１の封緘は、粘着テープに代えて、外フラップ１５を内フラップ１４に接着することでなされてもよい。 After folding the pair of inner flaps 14A and 14B inward along the third folding line L3, the operator folds the pair of outer flaps 15A and 15B inward along the third folding line L3 to form the tubular body W. Close the upper opening (see Figure 1). The tips of the pair of inner flaps 14A and 14B are separated from each other, and the tips of the pair of outer flaps 15A and 15B are butted against each other. The worker seals the packaging box 1 by sticking an adhesive tape (not shown) along the butted portions of the pair of outer flaps 15A and 15B. The packaging box 1 may be sealed by adhering the outer flap 15 to the inner flap 14 instead of the adhesive tape.

［包装箱の廃棄］
次に、図４ないし図７を参照して、包装箱１の廃棄作業（折畳作業）について説明する。図５は包装箱１（筒体Ｗ）を折畳状態Ｓ１にロックする過程を示す斜視図である。図６は折畳状態Ｓ１にロックした包装箱１を示す斜視図である。図７は折畳状態Ｓ１にロックした包装箱１の一部を示す断面図である。 [Disposal of packaging box]
Next, the disposal work (folding work) of the packaging box 1 will be described with reference to FIGS. 4 to 7. FIG. FIG. 5 is a perspective view showing the process of locking the packaging box 1 (cylindrical body W) in the folded state S1. FIG. 6 is a perspective view showing the packaging box 1 locked in the folded state S1. FIG. 7 is a sectional view showing a portion of the packaging box 1 locked in the folded state S1.

包装箱１に収容された商品は、一対の内フラップ１４Ａ，１４Ｂと一対の外フラップ１５Ａ，１５Ｂとを開き、筒体Ｗの上方の開口部を開放することで取り出される。商品を取り出して不要となった包装箱１は、嵩張らないように、二重に折り畳まれて廃棄される（正確には、廃棄されるまで、折り畳まれた包装箱１は複数重ねられて保管される）。 The products stored in the packaging box 1 are taken out by opening the pair of inner flaps 14A, 14B and the pair of outer flaps 15A, 15B and opening the upper opening of the cylinder W. The packaging box 1 that is no longer needed after the product has been taken out is double-folded and discarded so as not to be bulky (more precisely, a plurality of folded packaging boxes 1 are stacked and stored until discarded). ).

作業者は、上記した包装箱１の組立手順とは逆の手順によって、筒体Ｗ（包装箱１）を対角に位置する稜線（第１折曲線Ｌ１）で二重に折り畳んだ折畳状態Ｓ１にする（図４参照）。筒体Ｗは、第１折曲線Ｌ１まわりの復元力や内側に折り返された第１底壁１２等（第２折曲線Ｌ２まわりの復元力）によって膨らみ易く、折畳状態Ｓ１を維持し難く、均一な厚みになり難い。そこで、本実施形態に係る包装箱１では、ロック部３０が適正な折畳状態Ｓ１を維持するようになっている。 The worker folds the tubular body W (packaging box 1) double along the diagonally positioned ridge line (first folding line L1) by performing a procedure opposite to the procedure for assembling the packaging box 1 described above. S1 (see FIG. 4). The cylindrical body W tends to swell due to the restoring force around the first folding line L1 and the inwardly folded first bottom wall 12 and the like (the restoring force around the second folding line L2), making it difficult to maintain the folded state S1. It is difficult to obtain a uniform thickness. Therefore, in the packaging box 1 according to the present embodiment, the locking portion 30 maintains the proper folded state S1.

包装箱１を折畳状態Ｓ１にすると、外フラップ１５Ａが内フラップ１４Ａに対向し、係合片３２が切欠き部３１に対向する（図４参照）。作業者は、例えば、係合本体部３４に指を押し当てて係合片３２を切欠き部３１に押し込む（図５参照）。すると、一対の係合羽根部３５の自由端部が切欠き部３１に嵌り込み、係合片３２は、両側縁部３１Ａ，３１Ｂに案内されながら、切欠き部３１に押し込まれて行く（図５参照）。一対の係合羽根部３５の自由端側（係合片３２全体の自由端側）は、（ブランク１Ａの状態で）逆折り線Ｌ７で折れずとも、切欠き部３１を通過可能な幅に形成されているため、係合片３２を切欠き部３１に位置決めし易く、係合片３２を切欠き部３１に押し込む作業（ロック作業）を円滑に行うことができる。 When the packaging box 1 is in the folded state S1, the outer flap 15A faces the inner flap 14A and the engagement piece 32 faces the notch 31 (see FIG. 4). For example, the operator presses the engagement body portion 34 with a finger to push the engagement piece 32 into the notch portion 31 (see FIG. 5). Then, the free ends of the pair of engaging blades 35 are fitted into the notch 31, and the engaging piece 32 is pushed into the notch 31 while being guided by the side edges 31A and 31B (FIG. 5). reference). The free end side of the pair of engaging blades 35 (the free end side of the entire engaging piece 32) is formed to have a width that allows it to pass through the notch 31 without breaking at the reverse folding line L7 (in the state of the blank 1A). Therefore, the engagement piece 32 can be easily positioned in the cutout portion 31, and the work of pushing the engagement piece 32 into the cutout portion 31 (locking work) can be performed smoothly.

また、折畳状態Ｓ１において係合片３２が押し込まれると、折れ易く形成された第１折返し線Ｌ５に沿って係合額部３３が正折りされる。係合額部３３は、切欠き部３１に進入し、内フラップ１４Ａを横断し、切欠き部３１の基端側の断面（切欠き部３１に露出した内フラップ１４Ａの断面）に重なる（図６および図７参照）。第１折返し線Ｌ５は第２折返し線Ｌ６よりも折れ易くされているため、係合額部３３を切欠き部３１の基端側の断面に重ね易くなっている。 Further, when the engaging piece 32 is pushed in the folded state S1, the engaging forehead portion 33 is normally folded along the first folding line L5 which is formed to be easily broken. The engaging forehead portion 33 enters the cutout portion 31, traverses the inner flap 14A, and overlaps the cross section of the base end side of the cutout portion 31 (the cross section of the inner flap 14A exposed in the cutout portion 31) (Fig. 6 and Figure 7). Since the first folding line L5 is made easier to bend than the second folding line L6, the engaging forehead portion 33 can be easily overlapped with the cross section of the notch portion 31 on the proximal end side.

係合額部３３の正折りに伴って、一対の係合羽根部３５は、逆折り線Ｌ７で逆折りされながら係合本体部３４と共に切欠き部３１を通過する（図５参照）。係合片３２（係合本体部３４）が更に押し込まれると、図６および図７に示すように、切欠き部３１を通過した係合本体部３４は、第２折返し線Ｌ６に沿って正折りされて（略１８０度折り返されて）内フラップ１４Ａの表面に対向する（重なる）。つまり、係合片３２が内フラップ１４Ａを跨いだ状態となる。詳細には、係合本体部３４に第２折返し線Ｌ６まわりの復元力が働くため、係合本体部３４は、係合額部３３から下方に離れるに従って、内フラップ１４Ａの表面から僅かに離れるように傾斜した姿勢になる。 As the engaging forehead portion 33 is forwardly folded, the pair of engaging blade portions 35 pass through the notch portion 31 together with the engaging body portion 34 while being reversely folded along the reverse folding line L7 (see FIG. 5). When the engaging piece 32 (engaging main body portion 34) is pushed further, as shown in FIGS. It is folded (by approximately 180 degrees) to face (overlap) the surface of the inner flap 14A. That is, the engaging piece 32 straddles the inner flap 14A. Specifically, since a restoring force around the second folding line L6 acts on the engaging main body portion 34, the engaging main body portion 34 slightly separates from the surface of the inner flap 14A as it moves downward from the engaging forehead portion 33. It becomes a tilted posture.

また、図６および図７に示すように、切欠き部３１を通過した一対の係合羽根部３５は、逆折り線Ｌ７まわりの復元力で開かれ、係合本体部３４と同様に、内フラップ１４Ａの表面に対向する（重なる）。詳細には、係合羽根部３５は、逆折り線Ｌ７での折り癖によって、係合本体部３４から横方向に離れるに従って、内フラップ１４Ａの表面から僅かに離れるように傾斜した姿勢になる。また、一対の返し部３６は、係合額部３３よりも内フラップ１４Ａの自由端側（上方）に突出しており、上記した第２折返し線Ｌ６まわりの復元力によって、切欠き部３１の両側縁部３１Ａ，３１Ｂに押し付けられて係合する。詳細には、一対の返し部３６は、切欠き部３１の一方の側縁部３１Ａを形成する内フラップ１４Ａと、切欠き部３１の他方の側縁部３１Ｂを形成するように切欠き部３１に隣接する外フラップ１５Ｂと、に係合する。 6 and 7, the pair of engaging blade portions 35 that have passed through the notch portion 31 are opened by the restoring force around the reverse fold line L7, and like the engaging body portion 34, the inner flap Facing (overlapping) the surface of 14A. Specifically, the engaging blade portion 35 assumes a posture inclined slightly away from the surface of the inner flap 14A as it laterally separates from the engaging main body portion 34 due to the crease at the reverse fold line L7. In addition, the pair of return portions 36 protrude toward the free end side (upper side) of the inner flap 14A from the engaging forehead portion 33, and both sides of the notch portion 31 are protruded by the restoring force around the second return line L6. It is pressed against the edges 31A and 31B and engages. Specifically, the pair of return portions 36 are formed by the inner flap 14A forming one side edge portion 31A of the notch portion 31, and the notch portion 31 so as to form the other side edge portion 31B of the notch portion 31. and the outer flap 15B adjacent to the .

以上によって、包装箱１（筒体Ｗ）がロック部３０によって略均一な厚みとなる折畳状態Ｓ１に維持される。 As described above, the packaging box 1 (cylindrical body W) is maintained in the folded state S1 in which the locking portion 30 has a substantially uniform thickness.

以上説明した本実施形態に係る包装箱１では、折畳状態Ｓ１において、係合片３２が係合額部３３と係合本体部３４とで二段階に折れることで、係合本体部３４等が外フラップ１５Ａとの間に内フラップ１４Ａを挟み込む構成とした（図６および図７参照）。また、係合羽根部３５が係合本体部３４と略面一となるように開くことで、返し部３６が係合額部３３よりも上方で切欠き部３１の側縁部３１Ａ，３１Ｂに係合する構成とした（図６および図７参照）。この構成によれば、係合本体部３４が第２折返し線Ｌ６まわりの復元力によって開くように回動しようとすると、返し部３６が切欠き部３１の側縁部３１Ａ，３１Ｂに押し当てられ、係合本体部３４の回動が規制される。これにより、係合本体部３４および係合羽根部３５が内フラップ１４Ａと略平行な姿勢に保持されるため、複数の包装箱１を折り畳んだ状態で安定して平積みすることができる。その結果、複数の包装箱１を重ねても嵩張らず、重ねた包装箱１を保管する場所の省スペース化を図ることができる。 In the packaging box 1 according to the present embodiment described above, in the folded state S1, the engagement piece 32 is folded in two steps at the engagement frame portion 33 and the engagement main body portion 34, so that the engagement main body portion 34 and the like are folded. The inner flap 14A is sandwiched between the outer flap 15A and the outer flap 15A (see FIGS. 6 and 7). Further, by opening the engaging blade portion 35 so as to be substantially flush with the engaging main body portion 34, the return portion 36 engages with the side edge portions 31A and 31B of the notch portion 31 above the engaging forehead portion 33. (See FIGS. 6 and 7). According to this configuration, when the engaging body portion 34 tries to rotate to open by the restoring force around the second folding line L6, the folded portion 36 is pressed against the side edges 31A and 31B of the notch portion 31. , the rotation of the engaging body portion 34 is restricted. As a result, the engaging body portion 34 and the engaging blade portion 35 are held substantially parallel to the inner flap 14A, so that the plurality of packaging boxes 1 can be stably stacked flat in a folded state. As a result, even if a plurality of packaging boxes 1 are piled up, it does not become bulky, and the space for storing the piled packaging boxes 1 can be saved.

また、本実施形態に係る包装箱１では、第２折返し線Ｌ６が第１折返し線Ｌ５よりも折れ難く、第２折返し線Ｌ６まわりの復元力が第１折返し線Ｌ５まわりの復元力よりも強くなっている。このため、返し部３６を切欠き部３１の側縁部３１Ａ，３１Ｂに強く押し当てることができ、第２折返し線Ｌ６まわりの復元力と、筒体Ｗが膨らもうとする力（第１折曲線Ｌ１まわりの復元力）との協働によって、包装箱１の折畳状態Ｓ１を安定させることができる。 In addition, in the packaging box 1 according to the present embodiment, the second folding line L6 is more difficult to bend than the first folding line L5, and the restoring force around the second folding line L6 is stronger than the restoring force around the first folding line L5. It's becoming Therefore, the return portion 36 can be strongly pressed against the side edge portions 31A and 31B of the notch portion 31, and the restoring force around the second return line L6 and the expansion force of the cylindrical body W (first The folding state S1 of the packaging box 1 can be stabilized by cooperation with the restoring force around the folding line L1.

なお、本実施形態に係る包装箱１では、切欠き部３１が内フラップ１４Ａの角部を切り欠くことで形成され、一対の返し部３６が、切欠き部３１の両側縁部３１Ａ，３１Ｂを形成する内フラップ１４Ａと外フラップ１５Ｂとに係合していたが、本考案はこれに限定されない。例えば、図８に示すように、切欠き部３１が内フラップ１４Ａの横方向の中間部を切り欠くことで形成され、係合片３２が折畳状態Ｓ１で切欠き部３１に対向する位置に形成され、一対の返し部３６が切欠き部３１を有する内フラップ１４Ａのみに係合する構成としてもよい。しかしながら、この構成では、内フラップ１４Ａと外フラップ１５Ａとは略平行に重なるが、その他の内フラップ１４Ｂと外フラップ１５Ｂとは、第１折曲線Ｌ１まわりの復元力によって互いに離れようとし、二重に折り畳まれた包装箱１（筒体Ｗ）は均一な厚みにならず、平積みした際に不安定になる虞がある。 In addition, in the packaging box 1 according to the present embodiment, the notch portion 31 is formed by notching the corners of the inner flap 14A, and the pair of return portions 36 are formed so as to cover both side edge portions 31A and 31B of the notch portion 31. While engaging forming inner flap 14A and outer flap 15B, the invention is not so limited. For example, as shown in FIG. 8, a notch 31 is formed by notching the middle portion of the inner flap 14A in the lateral direction, and the engaging piece 32 is positioned to face the notch 31 in the folded state S1. A pair of return portions 36 may be formed so as to engage only with the inner flap 14A having the notch portion 31 . However, in this configuration, the inner flap 14A and the outer flap 15A are overlapped substantially parallel, but the other inner flap 14B and the outer flap 15B tend to separate from each other due to the restoring force around the first folding line L1, and double The folded packaging box 1 (cylindrical body W) does not have a uniform thickness and may become unstable when stacked flat.

これに対し、本実施形態に係る包装箱１では、折畳状態Ｓ１において、一対の返し部３６が、切欠き部３１を有する内フラップ１４Ａと、これに隣接する外フラップ１５Ｂとに係合する構成とした（図６参照）。この構成によれば、１つの係合片３２によって、内フラップ１４Ａと外フラップ１５Ｂとを、外フラップ１５Ａに略平行に重ねた状態に維持することができる。これにより、切欠き部３１を有する内フラップ１４Ａのみに係合片３２が係合する場合に比べて、二重に折り畳まれた包装箱１を略均一な厚みにすることができる。その結果、折畳状態Ｓ１とされた複数の包装箱１の平積みを更に安定させることができる。 On the other hand, in the packaging box 1 according to the present embodiment, in the folded state S1, the pair of return portions 36 engage the inner flap 14A having the notch portion 31 and the outer flap 15B adjacent thereto. (See FIG. 6). According to this configuration, the single engaging piece 32 can maintain the state in which the inner flap 14A and the outer flap 15B are overlapped substantially parallel to the outer flap 15A. Thereby, compared with the case where the engagement piece 32 engages only with the inner flap 14A having the notch 31, the doubly-folded packaging box 1 can have a substantially uniform thickness. As a result, the flat stacking of the plurality of packaging boxes 1 in the folded state S1 can be further stabilized.

なお、本実施形態に係る包装箱１では、１つの内フラップ１４Ａに１つの切欠き部３１が形成され、１つの外フラップ１５Ａに１つの係合片３２が形成されていたが、本考案はこれに限定されない。例えば、１つの内フラップ１４Ａに複数の切欠き部３１が形成され、１つの外フラップ１５Ａに複数の係合片３２が形成されてもよい（図示せず）。また、例えば、一対の内フラップ１４Ａ，１４Ｂの両方に切欠き部３１が形成され、一対の外フラップ１５Ａ，１５Ｂの両方に係合片３２が形成されてもよい（図示せず）。この構成によれば、折畳状態Ｓ１とされた包装箱１を更に均一な厚みに保持することが可能になる。さらに、例えば、１つ以上の切欠き部３１が外フラップ１５に形成され、１つ以上の係合片３２が内フラップ１４に形成されてもよい（図示せず）。この場合、外フラップ１５が第１フラップの一例となり、内フラップ１４が第２フラップの一例となる。 In addition, in the packaging box 1 according to the present embodiment, one notch portion 31 is formed in one inner flap 14A, and one engaging piece 32 is formed in one outer flap 15A. It is not limited to this. For example, a plurality of notches 31 may be formed in one inner flap 14A, and a plurality of engaging pieces 32 may be formed in one outer flap 15A (not shown). Also, for example, the cutout portions 31 may be formed in both the pair of inner flaps 14A and 14B, and the engaging pieces 32 may be formed in both the pair of outer flaps 15A and 15B (not shown). According to this configuration, it is possible to keep the packaging box 1 in the folded state S1 with a more uniform thickness. Further, for example, one or more notches 31 may be formed on the outer flap 15 and one or more engaging pieces 32 may be formed on the inner flap 14 (not shown). In this case, the outer flap 15 is an example of the first flap, and the inner flap 14 is an example of the second flap.

また、本実施形態に係る包装箱１では、切欠き部３１が略長方形状に形成されていたが、本考案はこれに限定されない。係合片３２の一対の返し部３６が切欠き部３１の両側縁部３１Ａ，３１Ｂに係合することを条件とすれば、切欠き部３１は、基端から自由端に向かって幅狭くなる（または幅広くなる）略台形状等の長方形状以外の多角形状に形成されてもよいし、円形（楕円形）状に形成されてもよい（図示せず）。 Moreover, although the notch part 31 was formed in substantially rectangular shape in the packaging box 1 which concerns on this embodiment, this invention is not limited to this. Provided that the pair of return portions 36 of the engaging piece 32 are engaged with the side edges 31A and 31B of the notch 31, the width of the notch 31 narrows from the base end toward the free end. It may be formed in a polygonal shape other than a rectangular shape such as a substantially trapezoidal shape (or widened), or may be formed in a circular (elliptical) shape (not shown).

また、本実施形態に係る包装箱１では、係合片３２の係合本体部３４が、基端から自由端に向かって幅狭くなる略三角形状に形成されていたが、これに限らず、例えば、図９に示すように、基端から自由端に向かって幅狭くなる略台形状に形成されてもよい。 In addition, in the packaging box 1 according to the present embodiment, the engagement body portion 34 of the engagement piece 32 is formed in a substantially triangular shape that narrows from the base end toward the free end. For example, as shown in FIG. 9, it may be formed in a substantially trapezoidal shape that narrows from the base end toward the free end.

また、本実施形態に係る包装箱１では、第１折返し線Ｌ５が、第２折返し線Ｌ６よりも折れ易く形成されていたが、本考案はこれに限定されない。第１折返し線Ｌ５と第２折返し線Ｌ６とを同一構造とし（図示せず）、同程度の折れ易さとすることを妨げない。 Moreover, in the packaging box 1 according to the present embodiment, the first folding line L5 is formed to be easier to fold than the second folding line L6, but the present invention is not limited to this. The first folding line L5 and the second folding line L6 may have the same structure (not shown) to have the same degree of breakability.

また、本実施形態に係る包装箱１では、一対の係合羽根部３５が、全体として略台形状に形成されていたが、これに限らず、例えば、全体として略長方形状に形成されてもよい（図示せず）。また、一対の係合羽根部３５の自由端側が、逆折り線Ｌ７で折れずとも、切欠き部３１を通過可能な幅に形成されていたが、本考案はこれに限定されない。例えば、一対の係合羽根部３５の自由端側は、切欠き部３１よりも横方向に幅広くてもよく、逆折り線Ｌ７で折れることで切欠き部３１を通過可能となるように形成されてもよい（図示せず）。 In addition, in the packaging box 1 according to the present embodiment, the pair of engaging blade portions 35 are formed in a substantially trapezoidal shape as a whole, but the present invention is not limited to this, and may be formed in a substantially rectangular shape as a whole, for example. (not shown). Also, the free end sides of the pair of engaging blades 35 are formed to have a width that allows them to pass through the notch 31 without being bent along the reverse fold line L7, but the present invention is not limited to this. For example, the free end sides of the pair of engaging blade portions 35 may be wider in the lateral direction than the notch portion 31, and are formed so as to be able to pass through the notch portion 31 by folding along the reverse folding line L7. (not shown).

また、本実施形態に係る包装箱１では、底面が所謂ワンタッチ底であったが、これに限らず、例えば、包装箱１の天面のように、複数のフラップを折り重ねて底面を形成してもよい（図示せず）。この場合、底面を形成するフラップに、ロック部３０（切欠き部３１および係合片３２）が形成されてもよい（図示せず）。 In addition, although the bottom surface of the packaging box 1 according to the present embodiment is a so-called one-touch bottom, the bottom surface is formed by folding a plurality of flaps like the top surface of the packaging box 1, for example. (not shown). In this case, the lock portion 30 (notch portion 31 and engagement piece 32) may be formed in the flap forming the bottom surface (not shown).

また、本実施形態に係る包装箱１は、紙製の両面段ボールシートで形成されていたが、これに限らず、片面段ボールシートや複両面段ボールシート、または厚紙、若しくは樹脂製の板（シート）等で形成されていてもよい。また、包装箱１の型式、包装箱１の各部の寸法（幅、奥行き、高さ）や形状、段ボールシート等の厚みや中しん９Ａが延びる方向等は自由に変更してもよい。 In addition, although the packaging box 1 according to the present embodiment is formed of a double-faced corrugated cardboard sheet made of paper, it is not limited to this, and a single-faced corrugated cardboard sheet, a double-faced corrugated cardboard sheet, or a board (sheet) made of cardboard or resin. etc. may be formed. The type of the packaging box 1, the dimensions (width, depth, height) and shape of each part of the packaging box 1, the thickness of the corrugated cardboard sheet, the direction in which the inner core 9A extends, etc. may be freely changed.

なお、上記実施形態の説明は、本考案に係る包装箱における一態様を示すものであって、本考案の技術範囲は、上記実施形態に限定されるものではない。本考案は技術的思想の趣旨を逸脱しない範囲において様々に変更、置換、変形されてもよく、実用新案登録請求の範囲は技術的思想の範囲内に含まれ得る全ての実施態様を含んでいる。 It should be noted that the description of the above embodiment shows one aspect of the packaging box according to the present invention, and the technical scope of the present invention is not limited to the above embodiment. The present invention may be changed, replaced, and modified in various ways without departing from the spirit of the technical idea, and the scope of utility model registration includes all embodiments that can be included within the scope of the technical idea. .

１包装箱
１０Ａ，１０Ｂ第１側壁
１１Ａ，１１Ｂ第２側壁
１４Ａ，１４Ｂ内フラップ（第１フラップ）
１５Ａ，１５Ｂ外フラップ（第２フラップ）
３０ロック部
３１切欠き部
３１Ａ，３１Ｂ側縁部
３２係合片
３３係合額部
３４係合本体部
３５係合羽根部
３６返し部
４０切断線
Ｗ筒体 1 packaging box 10A, 10B first side wall 11A, 11B second side wall 14A, 14B inner flap (first flap)
15A, 15B outer flap (second flap)
30 lock portion 31 notch portion 31A, 31B side edge portion 32 engagement piece 33 engagement forehead portion 34 engagement body portion 35 engagement blade portion 36 return portion 40 cutting line W cylindrical body

Claims

a cylindrical body (W) formed by alternately connecting a pair of first side walls (10A, 10B) and a pair of second side walls (11A, 11B);
a pair of first flaps (14A, 14B) connected to the pair of first side walls to close the opening of the cylinder;
a pair of second flaps (15A, 15B) connected to the pair of second side walls to close the opening of the cylinder;
a locking part (30) that opens the pair of first flaps and the pair of second flaps and maintains a folded state (S1) in which the cylindrical body is double-folded along diagonal ridge lines; prepared,
The lock section is
a notch portion (31) formed by notching a portion of the free end side of at least one of the pair of first flaps;
A pair of cutting lines (40) are formed by inserting a pair of cutting lines (40) from the free end of at least one of the pair of second flaps toward the base end so as to face the notch in the folded state. a joint piece (32);
The engagement piece is
an engaging forehead portion (33) connected to the second flap via a first folding line (L5) and formed so as to be able to enter the notch portion;
The engaging forehead is connected to the engaging forehead via a second folding line (L6), and is formed in a triangular or trapezoidal shape that can pass through the notch and that narrows from the base end to the free end. a union body (34);
a pair of engaging vane portions (35) including a pair of return portions (36) that are connected to both side ends of the engaging body portion via reverse folding lines (L7) and protrude toward the engaging forehead portion; , has
In the folded state, the engaging forehead portion is positively folded along the first folding line, enters the notch portion, overlaps the cross section of the notch portion on the base end side, and is formed on the engaging forehead portion. Along with the forward folding, the pair of engaging blade portions pass through the notch portion together with the engaging body portion while being reversely folded along the reverse folding line, and the engaging body portion that has passed through the notch portion , the pair of engaging blade portions that are normal-folded along the second folding line, face the surface of the first flap, and pass through the cutout portion are opened by a restoring force around the reverse folding line, A packaging box, wherein a pair of said return portions protruding toward the free end side of said first flap from a joint portion are engaged with both side edges of said notch portion.

the second side wall and the second flap are laterally longer than the first side wall and the first flap;
The notch is formed by notching a corner of the first flap,
In the folded state, the pair of return portions form the first flap forming one side edge (31A) of the notch and the other side edge (31B) of the notch. 2. The packaging box of claim 1, wherein said second flap adjacent said cut-out portion engages with said second flap so as to provide a contact.

The pair of first sidewalls and the pair of second sidewalls are alternately arranged in a row, and the first sidewalls and the second sidewalls located at both ends are joined to form the cylinder,
3. The notch portion is formed in the first flap connected to another first side wall different from the first side wall joined to the second side wall. Packaging box as described.

The packaging box according to any one of claims 1 to 3, wherein the first folding line includes one or more cuts and is formed to be easier to fold than the second folding line.

The pair of engaging blades are formed in a trapezoidal shape that narrows from the base end to the free end as a whole,
4. The free end sides of the pair of engaging blades are formed to have a width that allows them to pass through the notch without being bent along the reverse folding lines. The packaging box described in .