JP2015013679A - Packing box - Google Patents

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JP2015013679A
JP2015013679A JP2013142098A JP2013142098A JP2015013679A JP 2015013679 A JP2015013679 A JP 2015013679A JP 2013142098 A JP2013142098 A JP 2013142098A JP 2013142098 A JP2013142098 A JP 2013142098A JP 2015013679 A JP2015013679 A JP 2015013679A
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pair
insertion piece
packaging box
pushing
flap
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健治 石松
Kenji Ishimatsu
健治 石松
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Nippon Tokan Package Co Ltd
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Nippon Tokan Package Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a packing box capable of enhancing the support strength of a lock type bottom wall.SOLUTION: A packing box 10 is such that a bottom wall 21 is formed by overlapping a pair of outer flaps 50 on the outside of a pair of inner flaps 30 butted with each other. The outer flap 50 has a pair of insertion pieces 51 separated from each other, sandwiching a butted part 30a of the pair of inner flaps 30, and a reinforcement part 56 formed between the pair of insertion pieces 51 and swelling in a circular arc shape from the base end of one insertion piece 51 to the base end of the other insertion piece 51. The inner flap 30 has a push-in part 31 which opens by pushing in so as to insert the insertion piece 51 into. The tip position α of the circular arc edge 57 of the reinforcement part 56 is set on the base end side of the insertion piece 51 than the tip position β of the insertion piece 51.

Description

本発明は、包装箱に関し、特に、ロック式の底壁を備える包装箱に関する。   The present invention relates to a packaging box, and more particularly to a packaging box having a lock-type bottom wall.

ロック式の底壁を備える包装箱が広く利用されている。従来、この種の包装箱について、各種の技術が提案されている（例えば、特許文献１参照）。   Packaging boxes having a lock-type bottom wall are widely used. Conventionally, various techniques have been proposed for this type of packaging box (see, for example, Patent Document 1).

特許文献１には、一対の側壁から延出した側フラップに切込みを設け、一対の端壁から延出した端フラップの両側部に先端側へ延びる差込み片を形成した段ボール箱のフラップロックが開示されている。この段ボール箱のフラップロックでは、端フラップを屈曲させつつ差込み片を切込みに差込んで、側フラップと端フラップとを係止する。これにより、フラップ同士をロックした底壁が得られる。   Patent Document 1 discloses a flap lock for a corrugated cardboard box in which cuts are provided in side flaps extending from a pair of side walls, and insertion pieces are formed on both sides of the end flaps extending from the pair of end walls. Has been. In the flap lock of this cardboard box, the side flap and the end flap are locked by inserting the insertion piece into the cut while bending the end flap. Thereby, the bottom wall which locked the flaps is obtained.

ところで、近年、包装箱のさらなる品質向上が求められる中、底抜けの防止や底壁の撓み抑制の観点から、底壁の支持強度をより高めた包装箱が要望されている。   By the way, in recent years, while further improvement in quality of packaging boxes is required, a packaging box having a higher support strength for the bottom wall is desired from the viewpoint of preventing bottom-out and suppressing the bending of the bottom wall.

特開２００４-３３８７５８号公報JP 2004-338758 A

しかしながら、特許文献１のフラップロックにおいては、差込み片を切込みに差込み易くするため、一対の差込み片の間の部分は、側フラップと干渉しないように大きく抜けており、一対の差込み片の間における支持面が小さい。このため、底壁の支持強度をより高めるには、差込み片の周辺において、何らかの構造上の対策を講じる必要がある。   However, in the flap lock of Patent Document 1, in order to facilitate insertion of the insertion piece into the notch, a portion between the pair of insertion pieces is largely removed so as not to interfere with the side flap, and between the pair of insertion pieces. Small support surface. For this reason, in order to further increase the support strength of the bottom wall, it is necessary to take some structural measures around the insertion piece.

本発明は、このような事情に鑑みてなされたものであり、その目的は、ロック式の底壁の支持強度をより高めることができる包装箱を提供することにある。   This invention is made | formed in view of such a situation, The objective is to provide the packaging box which can raise the support strength of a lock type bottom wall more.

このような目的を達成するため、本発明は、以下の構成によって把握される。
（１）本発明は、対向する一対の第１側壁と、前記一対の第１側壁と直交する方向に対向する一対の第２側壁と、前記一対の第１側壁のそれぞれの下端に折り曲げ可能に連なる一対の内フラップと、前記一対の第２側壁のそれぞれの下端に折り曲げ可能に連なる一対の外フラップと、を有し、突合わせた前記一対の内フラップの外側に前記一対の外フラップを重ねることで底壁を形成する包装箱であって、前記外フラップは、前記一対の内フラップの突合わせ部を挟んで互いに離間する一対の差込み片と、前記一対の差込み片の間に形成され、一方の前記差込み片の基端から他方の前記差込み片の基端にかけて円弧状に膨らむ補強部と、を有し、前記内フラップは、押込むことにより開口して前記差込み片を差込ませる押込み部を有し、前記補強部の円弧状の縁の頂点位置は、前記差込み片の先端位置よりも前記差込み片の基端側に設定される、ことを特徴とする。 In order to achieve such an object, the present invention is grasped by the following configuration.
(1) The present invention can be bent at the respective lower ends of the pair of first side walls, the pair of second side walls facing each other in a direction orthogonal to the pair of first side walls, and the pair of first side walls. A pair of continuous inner flaps, and a pair of outer flaps that are foldably connected to lower ends of the pair of second side walls, and the pair of outer flaps are stacked on the outside of the pair of inner flaps that have been butted together In this case, the outer flap is formed between a pair of insertion pieces spaced apart from each other with the butted portions of the pair of inner flaps interposed therebetween, and the pair of insertion pieces, A reinforcing portion that swells in an arc shape from the base end of one of the insertion pieces to the base end of the other insertion piece, and the inner flap is opened by being pushed in to insert the insertion piece Part Vertex position of the arcuate edge of the strong part, than the tip position of the insertion piece is set on the proximal side of the insertion portion, characterized in that.

この構成によれば、一対の差込み片の間に補強部が形成されるので、この補強部によって、底壁の支持強度がより高まる。また、補強部の幅方向の両端は、一対の差込み片のそれぞれの基端に連なるため、差込み片の動きが補強部によって影響を受ける心配もない。さらに、補強部の円弧状の縁の頂点位置を、差込み片の先端位置よりも差込み片の基端側に設定したので、差込み片を押込み部に差込む際、補強部が内フラップに干渉することを防止できる。このため、押込み部に対し、差込み片をより円滑に差込んで行くことができるので、包装箱の組立て作業性を高めることもできる。   According to this configuration, since the reinforcing portion is formed between the pair of insertion pieces, the supporting strength of the bottom wall is further increased by the reinforcing portion. In addition, since both ends of the reinforcing portion in the width direction are connected to the respective base ends of the pair of insertion pieces, there is no fear that the movement of the insertion pieces is affected by the reinforcement portion. Furthermore, since the apex position of the arc-shaped edge of the reinforcing part is set to the proximal end side of the inserting piece with respect to the distal end position of the inserting piece, the reinforcing part interferes with the inner flap when the inserting piece is inserted into the pushing part. Can be prevented. For this reason, since an insertion piece can be inserted more smoothly with respect to a pushing part, the assembly workability | operativity of a packaging box can also be improved.

（２）本発明では、（１）の構成において、前記外フラップは、前記補強部を挟む両側で且つ前記円弧状の縁の延長線上に係止用切込みを有し、前記押込み部の開口縁は、前記差込み片が前記押込み部に差込まれた状態において、前記係止用切込みに係止される係止部を有する、ことを特徴とする。 (2) In the present invention, in the configuration of (1), the outer flap has locking cuts on both sides of the reinforcing portion and on an extension line of the arc-shaped edge, and an opening edge of the pushing portion Has a locking portion that is locked to the locking cut in a state where the insertion piece is inserted into the pressing portion.

この構成によれば、差込み片が押込み部に差込まれた状態において、押込み部の開口縁の係止部によって、外フラップの係止用切込みが係止されるので、差込み片が押込み部から引き抜けることをより確実に防止できる。これにより、底壁の支持強度を一層高めることができる。   According to this configuration, in the state where the insertion piece is inserted into the pushing portion, the notch for locking the outer flap is locked by the locking portion of the opening edge of the pushing portion, so that the insertion piece is removed from the pushing portion. Pulling out can be more reliably prevented. Thereby, the support strength of the bottom wall can be further increased.

（３）本発明では、（１）または（２）の構成において、前記押込み部の開口縁は、前記差込み片が前記押込み部に差込まれて行く過程において、前記差込み片を前記内フラップの裏側に案内する凹状の丸み部を有する、ことを特徴とする。 (3) According to the present invention, in the configuration of (1) or (2), the opening edge of the push-in portion is inserted into the push-in portion while the insert piece is inserted into the push-in portion. It has the concave round part guided to a back side, It is characterized by the above-mentioned.

この構成によれば、差込み片が押込み部に差込まれて行く過程において、凹状の丸み部により、差込み片が押込み部の裏側に円滑に案内されるため、押込み部に差込み片をより容易に差込むことができ、包装箱の組立て作業性のさらなる向上を図ることができる。   According to this configuration, since the insertion piece is smoothly guided to the back side of the pushing portion by the concave rounded part in the process of being inserted into the pushing portion, the insertion piece is more easily inserted into the pushing portion. It can be inserted, and the assembly workability of the packaging box can be further improved.

（４）本発明では、（１）〜（３）のいずれかの構成において、前記押込み部の開口縁は、前記差込み片が前記押込み部に差込まれた状態において、前記差込み片の外面を押圧する凸状の丸み部を有する、ことを特徴とする。 (4) In the present invention, in any one of the constitutions (1) to (3), the opening edge of the push-in portion is the outer surface of the insert piece in a state where the insert piece is inserted into the push-in portion. It has the convex round part to press, It is characterized by the above-mentioned.

この構成によれば、差込み片が押込み部に差込まれた状態において、押込み部の開口縁の丸み部により、差込み片の外面が局所的に押圧されるので、差込み片に対する押込み部の保持力が高まる。その結果、底壁のさらなる強度向上を実現することができる。   According to this configuration, since the outer surface of the insertion piece is locally pressed by the rounded portion of the opening edge of the insertion portion in a state where the insertion piece is inserted into the insertion portion, the holding force of the insertion portion with respect to the insertion piece Will increase. As a result, further improvement in strength of the bottom wall can be realized.

（５）本発明では、（１）〜（４）のいずれかの構成において、前記差込み片は、先端縁の幅方向の端部に面取り部を有する、ことを特徴とする。 (5) In this invention, in any structure of (1)-(4), the said insertion piece has a chamfering part in the edge part of the width direction of a front-end edge, It is characterized by the above-mentioned.

この構成によれば、差込み片を押込み部に差込む際、面取り部によって、差込み片を押込み部に容易に差込むことができる。これにより、包装箱の組立て作業性をより一層高めることができる。   According to this configuration, when the insertion piece is inserted into the pushing portion, the insertion piece can be easily inserted into the pushing portion by the chamfered portion. Thereby, the assembly workability | operativity of a packaging box can be improved further.

本発明によれば、ロック式の底壁の支持強度をより高めることができる包装箱を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the packaging box which can raise the support strength of a lock type bottom wall more can be provided.

本発明に係る実施形態の包装箱の斜視図である。It is a perspective view of the packaging box of embodiment which concerns on this invention. 図１のＡ矢視図である。It is A arrow directional view of FIG. 図１に示す包装箱の展開図である。It is an expanded view of the packaging box shown in FIG. （ａ）は図３のＢ部拡大図、（ｂ）は図３のＣ部拡大図である。(A) is the B section enlarged view of FIG. 3, (b) is the C section enlarged view of FIG. 包装箱の組立て方法の説明図であり、上下反転させた包装箱の斜視図である。It is explanatory drawing of the assembly method of a packaging box, and is a perspective view of the packaging box turned upside down. 包装箱の組立て方法における差込み片の差込み過程を説明する図であり、（ａ）は初期段階を示す図、（ｂ）は途中段階を示す図、（ｃ）は差込みが終了した段階を示す図である。It is a figure explaining the insertion process of the insertion piece in the assembly method of a packaging box, (a) is a figure which shows an initial stage, (b) is a figure which shows an intermediate | middle stage, (c) is a figure which shows the stage where insertion was completed It is. 図６（ｃ）のＤ部を拡大して示す斜視図である。It is a perspective view which expands and shows the D section of FIG.6 (c). 図６（ｃ）のＥ―Ｅ断面図である。It is EE sectional drawing of FIG.6 (c). 組立て作業が完了した包装箱の平面図である。It is a top view of the packaging box which the assembly operation was completed. 比較例に係る包装箱の説明図であり、図６（ａ）に対応する図である。It is explanatory drawing of the packaging box which concerns on a comparative example, and is a figure corresponding to Fig.6 (a).

以下、添付図面を参照して、本発明を実施するための形態（以下、「実施形態」と称する）について詳細に説明する。実施形態の説明の全体を通して同じ要素には同じ番号を付している。   DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the accompanying drawings. The same number is attached | subjected to the same element through the whole description of embodiment.

（包装箱１０の全体構成）
まず、包装箱１０の全体構成を図１、図２に基づいて説明する。
図１に示すように、実施形態の包装箱１０は、段ボールシート１１（図３参照）を折り曲げて形成される段ボール箱であり、周壁１２と、この周壁１２の上端側を塞ぐ上壁１３とを有する。周壁１２は、対向する一対の第１側壁１５と、一対の第１側壁１５と直交する方向に対向する一対の第２側壁１６とを有する。上壁１３は、一対の第２側壁１６のそれぞれの上端に折り曲げ可能に連なる一対の内フラップ１７と、一対の第２側壁１６のそれぞれの上端に折り曲げ可能に連なる一対の外フラップ１８とを有し、一対の内フラップ１７の外側（上側）に一対の外フラップ１８を重ねることで形成される。 (Overall configuration of the packaging box 10)
First, the whole structure of the packaging box 10 is demonstrated based on FIG. 1, FIG.
As shown in FIG. 1, the packaging box 10 of the embodiment is a cardboard box formed by bending a cardboard sheet 11 (see FIG. 3), a peripheral wall 12, and an upper wall 13 that closes the upper end side of the peripheral wall 12. Have The peripheral wall 12 has a pair of first side walls 15 facing each other and a pair of second side walls 16 facing each other in a direction orthogonal to the pair of first side walls 15. The upper wall 13 has a pair of inner flaps 17 that are foldably connected to the upper ends of the pair of second side walls 16, and a pair of outer flaps 18 that are foldably connected to the upper ends of the pair of second side walls 16. Then, the pair of outer flaps 18 is formed on the outer side (upper side) of the pair of inner flaps 17.

なお、この例では、水平断面が長方形状に形成された包装箱１０を示すが、包装箱１０の水平断面は、長方形状や正方形などの四角形状の他、六角形や八角形状でもよい。   In addition, although this example shows the packaging box 10 having a horizontal cross section formed in a rectangular shape, the horizontal cross section of the packaging box 10 may be a rectangular shape such as a rectangular shape or a square shape, or a hexagonal shape or an octagonal shape.

図１に示すように、包装箱１０は、いわゆるＡ式カートンの基本構成において底構造を変更したものであり、周壁１２の下端側を塞ぐロック式の底壁２１を有する。この底壁２１は、一対の第１側壁１５のそれぞれの下端に折り曲げ可能に連なる一対の内フラップ３０と、一対の第２側壁１６のそれぞれの下端に折り曲げ可能に連なる一対の外フラップ５０とを有し、突合わせた一対の内フラップ３０の外側（下側）に一対の外フラップ５０を重ねてロックすることで形成される。   As shown in FIG. 1, the packaging box 10 is obtained by changing the bottom structure in the basic configuration of a so-called A-type carton, and has a lock-type bottom wall 21 that closes the lower end side of the peripheral wall 12. The bottom wall 21 includes a pair of inner flaps 30 that are foldably connected to the lower ends of the pair of first side walls 15 and a pair of outer flaps 50 that are foldably connected to the lower ends of the pair of second side walls 16. The pair of outer flaps 50 are overlapped and locked on the outer side (lower side) of the paired and abutted inner flaps 30.

（段ボールシート１１の構成）
次に、段ボールシート１１の構成を図３に基づいて説明する。
図３に示すように、段ボールシート１１は、長尺のシートから打抜いたブランクであり、段ボールシート１１では、第１側壁１５と第２側壁１６とが縦罫線１１ａを介して交互に連なっており、最も側端に位置する第１側壁１５の開放端には、縦罫線１１ａを介して接合部１１ｂが設けられる。各第１側壁１５の上下両端には、それぞれ、横罫線１１ｃを介して外フラップ１８、内フラップ３０が連なり、各第２側壁１６の上下両端には、それぞれ、横罫線１１ｃを介して内フラップ１７、外フラップ５０が連なる。 (Configuration of cardboard sheet 11)
Next, the configuration of the cardboard sheet 11 will be described with reference to FIG.
As shown in FIG. 3, the corrugated cardboard sheet 11 is a blank punched out from a long sheet. In the corrugated cardboard sheet 11, the first side wall 15 and the second side wall 16 are alternately connected via the vertical ruled line 11a. In addition, a joint portion 11b is provided at an open end of the first side wall 15 located at the most side end via a vertical ruled line 11a. An outer flap 18 and an inner flap 30 are connected to the upper and lower ends of each first side wall 15 via a horizontal ruled line 11c, and an inner flap is connected to the upper and lower ends of each second side wall 16 via a horizontal ruled line 11c. 17. The outer flap 50 is continuous.

外フラップ５０は、幅方向の両端部に一対の差込み片５１を有する。これら一対の差込み片５１は、包装箱１０の組立て状態において一対の内フラップ３０の突合わせ部３０ａ（図２参照）を挟んで互いに離間する。一方、内フラップ３０は、押込むことにより開口して差込み片５１を差込ませる押込み部３１を有する。   The outer flap 50 has a pair of insertion pieces 51 at both ends in the width direction. The pair of insertion pieces 51 are separated from each other with the butting portions 30 a (see FIG. 2) of the pair of inner flaps 30 in the assembled state of the packaging box 10. On the other hand, the inner flap 30 has a pushing portion 31 that is opened by being pushed and into which the insertion piece 51 is inserted.

（外フラップ５０、内フラップ３０の構成）
続いて、外フラップ５０および内フラップ３０の詳しい構成を図４に基づいて説明する。 (Configuration of outer flap 50 and inner flap 30)
Next, detailed configurations of the outer flap 50 and the inner flap 30 will be described with reference to FIG.

図４（ａ）に示すように、外フラップ５０は、横罫線１１ｃに連なるフラップ基部５２と、このフラップ基部５２に差込み用罫線５３を介して連なる機能部５５とによって構成される。機能部５５は、一対の差込み片５１と、一対の差込み片５１の間に形成され、一方の差込み片５１の基端から他方の差込み片５１の基端にかけて円弧状に膨らむ補強部５６とを有する。また、機能部５５は、補強部５６を挟む両側で且つ円弧状の縁５７の延長線上に係止用切込み５８を有する。   As shown in FIG. 4A, the outer flap 50 includes a flap base 52 that is continuous with the horizontal ruled line 11 c and a functional part 55 that is continuous with the flap base 52 via an insertion ruled line 53. The functional portion 55 includes a pair of insertion pieces 51 and a reinforcing portion 56 that is formed between the pair of insertion pieces 51 and swells in an arc shape from the base end of one insertion piece 51 to the base end of the other insertion piece 51. Have. In addition, the functional part 55 has locking cuts 58 on both sides of the reinforcing part 56 and on the extension line of the arcuate edge 57.

差込み片５１は、横罫線１１ｃと平行な先端縁６１と、この先端縁６１の幅方向の両端部に設けられる面取り部６２と、補強部５６側の面取り部６２から円弧状の縁５７の側端に延びる傾斜部６３とを有する。この傾斜部６３は、補強部５６側の面取り部６２から矢印Ｐ１で示す差込み方向（以下、「差込み方向Ｐ１」と称する）に対して所定の角度θだけ傾斜している。差込み片５１では、面取り部６２および傾斜部６３によって、先端縁６１側に行くに従って幅が徐々に小さくなるように形成される。   The insertion piece 51 includes a tip edge 61 parallel to the horizontal ruled line 11c, a chamfered portion 62 provided at both ends in the width direction of the tip edge 61, and a side of the arcuate edge 57 from the chamfered portion 62 on the reinforcing portion 56 side. And an inclined portion 63 extending to the end. The inclined portion 63 is inclined from the chamfered portion 62 on the reinforcing portion 56 side by a predetermined angle θ with respect to the insertion direction indicated by the arrow P1 (hereinafter referred to as “insertion direction P1”). The insertion piece 51 is formed by the chamfered portion 62 and the inclined portion 63 so that the width gradually decreases toward the tip edge 61 side.

さらに、補強部５６において、円弧状の縁５７の頂点位置αは、差込み片５１の先端位置βよりも、距離Ｑだけ差込み片５１の基端側に設定される。つまり、頂点位置αと先端位置βとは、差込み方向Ｐ１において距離Ｑだけずれている。   Further, in the reinforcing portion 56, the vertex position α of the arc-shaped edge 57 is set to the proximal end side of the insertion piece 51 by a distance Q from the distal end position β of the insertion piece 51. That is, the vertex position α and the tip position β are shifted by a distance Q in the insertion direction P1.

図４（ｂ）に示すように、押込み部３１は、差込み方向Ｐ１と直交する方向（以下、「直交方向Ｐ２」と称する）に沿って形成される押込み用罫線３２と、この押込み用罫線３２よりも差込み方向Ｐ１の前方側に形成される切込み３３とによって構成される。押込み用罫線３２は、内フラップ３０の横罫線１１ｃから直交方向Ｐ２に沿って内フラップ３０の先端側に向けて延びる。切込み３３によって囲われる折曲げ片３５は、押込み用罫線３２を基点に折り曲げ可能であり、折れ曲がることで、内フラップ３０の裏面側に押込まれる。これにより、押込み部３１では、切込み３３と同一形状の開口縁３６が形成される。   As shown in FIG. 4B, the pushing portion 31 includes a pushing ruled line 32 formed along a direction orthogonal to the insertion direction P1 (hereinafter referred to as “orthogonal direction P2”), and the pushing ruled line 32. And a cut 33 formed on the front side in the insertion direction P1. The pushing ruled line 32 extends from the horizontal ruled line 11c of the inner flap 30 toward the front end side of the inner flap 30 along the orthogonal direction P2. The bent piece 35 surrounded by the notch 33 can be bent with the pressing ruled line 32 as a base point, and is bent and pushed into the back side of the inner flap 30. Thereby, in the pushing part 31, the opening edge 36 of the same shape as the notch 33 is formed.

切込み３３は、押込み用罫線３２の一端から差込み方向Ｐ１に沿って延びる第１切込み４１と、この第１切込み４１から差込み方向Ｐ１に対して斜めに延びる第２切込み４２と、この第２切込み４２から差込み方向Ｐ１に沿って延びる第３切込み４３とを有する。また、切込み３３は、第３切込み４３から直交方向Ｐ２に沿って延びる第４切込み４４と、この第４切込み４４に連なる円弧状の第５切込み４５と、この第５切込み４５から直交方向Ｐ２に沿って延びる第６切込み４６と、この第６切込み４６から押込み用罫線３２の他端に円弧状に形成される第７切込み４７とによって構成される。   The incision 33 includes a first incision 41 extending from one end of the pressing ruled line 32 along the insertion direction P1, a second incision 42 extending obliquely from the first incision 41 with respect to the insertion direction P1, and the second incision 42. And a third cut 43 extending along the insertion direction P1. The notch 33 includes a fourth notch 44 extending from the third notch 43 along the orthogonal direction P2, an arcuate fifth notch 45 continuous with the fourth notch 44, and an orthogonal direction P2 extending from the fifth notch 45. A sixth cut 46 extending along the line and a seventh cut 47 formed in an arc shape from the sixth cut 46 to the other end of the ruled line 32 for pushing.

ここで、第２切込み４２は、開口縁３６において、本発明にいう「係止部」に相当する部分であり、係止用切込み５８に対応した形状に形成され、且つ、差込み片５１が押込み部３１に差込まれた状態において係止用切込み５８に嵌合・係止される。また、第５切込み４５は、開口縁３６において、本発明にいう「凸状の丸み部」に相当する部分であり、差込み片５１が押込み部３１に差込まれた状態で、差込み片５１の外面を押圧する。さらに、第７切込み４７は、開口縁３６において、本発明にいう「凹状の丸み部」に相当する部分であり、差込み片５１が押込み部３１に差込まれて行く過程で、差込み片５１を内フラップ３０の裏側に案内する。   Here, the second cut 42 is a portion corresponding to the “locking portion” in the present invention at the opening edge 36, is formed in a shape corresponding to the locking cut 58, and the insertion piece 51 is pushed in. In the state of being inserted into the portion 31, it is fitted and locked to the locking cut 58. The fifth cut 45 is a portion corresponding to the “convex round portion” in the present invention at the opening edge 36, and the insertion piece 51 is inserted into the pushing portion 31 in the state where the insertion piece 51 is inserted. Press the outer surface. Further, the seventh cut 47 is a portion corresponding to the “concave round portion” in the present invention at the opening edge 36, and the plug 51 is inserted into the push-in portion 31 in the process of being inserted into the push-in portion 31. Guide to the back side of the inner flap 30.

（包装箱１０の組立て方法）
次に、包装箱１０の組立て方法を図５〜図９に基づいて説明する。
図５に示すように、この組立て方法では、まず、縦罫線１１ａに沿って、段ボールシート１１（図３参照）を角筒状に形成し、接合部１１ｂを介して最も側端に位置する第１側壁１５と第２側壁１６を接合する。次に、一対の内フラップ３０を横罫線１１ｃに沿って折り曲げ、突合わせる（矢印（１），（２））。そして、一対の外フラップ５０のそれぞれを横罫線１１ｃおよび差込み用罫線５３に沿って折り曲げながら、各差込み片５１を押込み部３１に押込むようにして差込む（矢印（３），（４））。 (Assembly method of packaging box 10)
Next, a method for assembling the packaging box 10 will be described with reference to FIGS.
As shown in FIG. 5, in this assembling method, first, the corrugated cardboard sheet 11 (see FIG. 3) is formed in a rectangular tube shape along the vertical ruled line 11a, and the first position located at the side end through the joint portion 11b. The first side wall 15 and the second side wall 16 are joined. Next, the pair of inner flaps 30 are bent along the horizontal ruled line 11c and abutted (arrows (1), (2)). Then, while inserting each of the pair of outer flaps 50 along the horizontal ruled lines 11c and the ruled lines 53 for insertion, each insertion piece 51 is inserted so as to be pushed into the pushing portion 31 (arrows (3), (4)).

ここで、差込み片５１を押込み部３１に差込む過程を詳細に説明する。
図６（ａ）に示すように、横罫線１１ｃおよび差込み用罫線５３で折り曲げつつ、差込み片５１を折曲げ片３５に押当てることにより、押込み用罫線３２を基点に折曲げ片３５を折り曲げながら、差込み片５１を押込む（矢印（５））。このとき、差込み片５１の先端位置βでは、差込み片５１と内フラップ３０（折曲げ片３５）が接触するが、円弧状の縁５７の頂点位置αでは、差込み片５１の先端位置βよりも距離Ｑ（図４（ａ）参照）だけ差込み片５１の基端側にずれているため、補強部５６が内フラップ３０に接触しない。また、第７切込み４７によって、差込み片５１の面取り部６２が内フラップ３０の裏側に円滑に案内される。 Here, the process of inserting the insertion piece 51 into the pushing portion 31 will be described in detail.
As shown in FIG. 6 (a), while bending the horizontal ruled line 11c and the insertion ruled line 53 while pressing the insertion piece 51 against the bent piece 35, the bent piece 35 is bent based on the pressing ruled line 32. Then, the insertion piece 51 is pushed in (arrow (5)). At this time, the insertion piece 51 and the inner flap 30 (bending piece 35) are in contact with each other at the distal end position β of the insertion piece 51. However, at the vertex position α of the arcuate edge 57, the tip position β of the insertion piece 51 is greater. The reinforcing portion 56 does not contact the inner flap 30 because it is displaced toward the proximal end side of the insertion piece 51 by a distance Q (see FIG. 4A). Further, the chamfered portion 62 of the insertion piece 51 is smoothly guided to the back side of the inner flap 30 by the seventh cut 47.

図６（ｂ）に示すように、差込み片５１を押込み部３１にさらに差込んで行くと（矢印（６））、直線状の第１切込み４１と傾斜部６３が接触する。このため、押込み部３１への差込み片５１の差込みが若干きつくなる。そして、図６（ｃ）に示すように、差込み片５１を押込み部３１に完全に差込んだ段階では、第２切込み４２と、開いた係止用切込み５８とが嵌合する。すなわち、図７に示すように、外フラップ５０の係止用切込み５８が第２切込み４２にしっかりと係止される。これにより、差込み片５１が押込み部３１に確実に保持される。また、図８に示すように、開口縁３６の第５切込み４５によって、差込み片５１の外面が局所的に押圧されるので、差込み片５１は、高い保持力で押込み部３１に保持される。   As shown in FIG. 6B, when the insertion piece 51 is further inserted into the pushing portion 31 (arrow (6)), the linear first cut 41 and the inclined portion 63 come into contact with each other. For this reason, the insertion of the insertion piece 51 into the pushing portion 31 is slightly tight. Then, as shown in FIG. 6C, at the stage where the insertion piece 51 is completely inserted into the pushing portion 31, the second cut 42 and the open locking cut 58 are fitted. That is, as shown in FIG. 7, the locking cut 58 of the outer flap 50 is firmly locked to the second cut 42. Thereby, the insertion piece 51 is reliably held by the pushing portion 31. Moreover, as shown in FIG. 8, since the outer surface of the insertion piece 51 is locally pressed by the 5th notch 45 of the opening edge 36, the insertion piece 51 is hold | maintained at the pressing part 31 with high holding force.

なお、差込み片５１の傾斜部６３および直線状の第１切込み４１は、接触する際、互いに変形しながら接触するが、図６（ｂ）では、傾斜部６３および第１切込み４１を交差させて模式的に示している。   The inclined portion 63 of the insertion piece 51 and the linear first cut 41 are in contact with each other while deforming, but in FIG. 6B, the inclined portion 63 and the first cut 41 are crossed. This is shown schematically.

このような差込み片５１の差込み作業を一対の外フラップ５０のそれぞれについて行うことで、包装箱１０の底壁２１の組立てが完了する。   By performing such an insertion operation of the insertion piece 51 for each of the pair of outer flaps 50, the assembly of the bottom wall 21 of the packaging box 10 is completed.

（実施形態の効果）
以上、説明した包装箱１０の効果について述べる。
包装箱１０によれば、一対の差込み片５１の間に補強部５６が形成されるので、この補強部５６によって増えた面積分（図９において斜線部で示す）、底壁２１の支持強度がより高まる。また、補強部５６の幅方向の両端は、一対の差込み片５１のそれぞれの基端に連なるため、差込み片５１の動きが補強部５６によって影響を受ける心配もない。 (Effect of embodiment)
The effects of the packaging box 10 described above will be described.
According to the packaging box 10, since the reinforcing portion 56 is formed between the pair of insertion pieces 51, the supporting strength of the bottom wall 21 is increased by the area (indicated by the hatched portion in FIG. 9) increased by the reinforcing portion 56. Increase more. Further, since both ends of the reinforcing portion 56 in the width direction are connected to the respective base ends of the pair of insertion pieces 51, there is no fear that the movement of the insertion piece 51 is affected by the reinforcement portion 56.

さらに、補強部５６の頂点位置αを、差込み片５１の先端位置βよりも差込み片５１の基端側に設定したので、差込み片５１を押込み部３１に差込んで行く際、補強部５６の頂点位置αが内フラップ３０に干渉することを防止できる。   Furthermore, since the apex position α of the reinforcing portion 56 is set closer to the proximal end side of the inserting piece 51 than the distal end position β of the inserting piece 51, when the inserting piece 51 is inserted into the pushing portion 31, It is possible to prevent the vertex position α from interfering with the inner flap 30.

仮に、差込み方向Ｐ１において補強部５６の頂点位置αと差込み片５１の先端位置βとを一致させた場合について考える。この場合、図１０に示すように、包装箱１０Ａにおいて、差込み片５１の先端位置βが内フラップ３０に接触すると、頂点位置αにおいて、補強部５６も内フラップ３０に干渉してしまう。このため、押込み部３１に対し、差込み片５１を差込みづらくなる。   Consider a case where the apex position α of the reinforcing portion 56 and the tip position β of the insertion piece 51 are matched in the insertion direction P1. In this case, as shown in FIG. 10, when the tip position β of the insertion piece 51 contacts the inner flap 30 in the packaging box 10 </ b> A, the reinforcing portion 56 also interferes with the inner flap 30 at the vertex position α. For this reason, it is difficult to insert the insertion piece 51 into the pushing portion 31.

この点、本実施形態では、補強部５６の頂点位置αが内フラップ３０に干渉することを防止できるので、押込み部３１に対し、差込み片５１をより円滑に差込んで行くことができる。したがって、包装箱１０の組立て作業性を高めることができる。   In this respect, in the present embodiment, it is possible to prevent the vertex position α of the reinforcing portion 56 from interfering with the inner flap 30, so that the insertion piece 51 can be more smoothly inserted into the pushing portion 31. Therefore, the assembly workability of the packaging box 10 can be improved.

また、差込み片５１が押込み部３１に差込まれた状態において、開口縁３６の第２切込み４２によって、外フラップ５０の係止用切込み５８が係止されるので、差込み片５１が押込み部３１から引き抜けることをより確実に防止することができる。これにより、底壁２１の支持強度を一層高めることができる。   Further, in the state where the insertion piece 51 is inserted into the pushing portion 31, the locking cut 58 of the outer flap 50 is locked by the second cut 42 of the opening edge 36, so that the insertion piece 51 is pushed into the pushing portion 31. It is possible to more reliably prevent withdrawal from. Thereby, the support strength of the bottom wall 21 can be further increased.

また、差込み片５１が押込み部３１に差込まれて行く過程において、第７切込み４７によって、差込み片５１が内フラップ３０の裏側に円滑に案内されるため、押込み部３１に差込み片５１をより容易に差込むことができ、包装箱１０の組立て作業性のさらなる向上を図ることができる。   Further, in the process in which the insertion piece 51 is inserted into the pushing portion 31, the insertion piece 51 is smoothly guided to the back side of the inner flap 30 by the seventh notch 47. It can be easily inserted, and the assembly workability of the packaging box 10 can be further improved.

さらに、差込み片５１が押込み部３１に差込まれた状態において、開口縁３６の第５切込み４５によって、差込み片５１の外面が局所的に押圧されるので、差込み片５１に対する押込み部３１の保持力が高まる。その結果、底壁２１のさらなる強度向上を実現することができる。   Furthermore, since the outer surface of the insertion piece 51 is locally pressed by the fifth cut 45 of the opening edge 36 in a state where the insertion piece 51 is inserted into the insertion portion 31, the holding portion 31 is held against the insertion piece 51. Power increases. As a result, the strength of the bottom wall 21 can be further improved.

加えて、差込み片５１を押込み部３１に差込む際、面取り部６２によって、差込み片５１を押込み部３１に容易に差込むことができる。これにより、包装箱１０の組立て作業性をより一層高めることができる。   In addition, when the insertion piece 51 is inserted into the pressing portion 31, the insertion piece 51 can be easily inserted into the pressing portion 31 by the chamfered portion 62. Thereby, the assembly workability | operativity of the packaging box 10 can be improved further.

以上、実施形態を用いて本発明を説明したが、本発明の技術的範囲は上記実施形態に記載の範囲には限定されないことは言うまでもない。上記実施形態に、多様な変更または改良を加えることが可能であることが当業者に明らかである。またその様な変更または改良を加えた形態も本発明の技術的範囲に含まれ得ることが、特許請求の範囲の記載から明らかである。   As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

１０ 包装箱
１５ 第１側壁
１６ 第２側壁
２１ 底壁
３０ 内フラップ
３０ａ 突合わせ部
３１ 押込み部
３３ 切込み
３６ 開口縁
４２ 第２切込み（係止部）
４５ 第５切込み（凸状の丸み部）
４７ 第７切込み（凹状の丸み部）
５０ 外フラップ
５１ 差込み片
５６ 補強部
５７ 円弧状の縁
５８ 係止用切込み
６１ 先端縁
６２ 面取り部
Ｐ１ 差込み方向
α 円弧状の縁の頂点位置
β 差込み片の先端位置 DESCRIPTION OF SYMBOLS 10 Packaging box 15 1st side wall 16 2nd side wall 21 Bottom wall 30 Inner flap 30a Butting part 31 Pushing part 33 Cutting 36 Opening edge 42 2nd cutting (locking part)
45 5th cut (convex round part)
47 7th cut (concave round part)
50 Outer flap 51 Insertion piece 56 Reinforcement part 57 Arc-shaped edge 58 Locking cut 61 Tip edge 62 Chamfering part P1 Insertion direction α Arc-shaped edge apex position β Tip position of the insertion piece

Claims (5)

対向する一対の第１側壁と、前記一対の第１側壁と直交する方向に対向する一対の第２側壁と、前記一対の第１側壁のそれぞれの下端に折り曲げ可能に連なる一対の内フラップと、前記一対の第２側壁のそれぞれの下端に折り曲げ可能に連なる一対の外フラップと、を有し、突合わせた前記一対の内フラップの外側に前記一対の外フラップを重ねることで底壁を形成する包装箱であって、
前記外フラップは、
前記一対の内フラップの突合わせ部を挟んで互いに離間する一対の差込み片と、
前記一対の差込み片の間に形成され、一方の前記差込み片の基端から他方の前記差込み片の基端にかけて円弧状に膨らむ補強部と、
を有し、
前記内フラップは、
押込むことにより開口して前記差込み片を差込ませる押込み部を有し、
前記補強部の円弧状の縁の頂点位置は、
前記差込み片の先端位置よりも前記差込み片の基端側に設定される、
ことを特徴とする包装箱。 A pair of opposed first side walls, a pair of second side walls opposed to each other in a direction orthogonal to the pair of first side walls, a pair of inner flaps that are foldably connected to lower ends of the pair of first side walls, A pair of outer flaps that are foldably connected to the respective lower ends of the pair of second side walls, and the pair of outer flaps are overlapped on the outside of the pair of inner flaps that are butted together to form a bottom wall. A packaging box,
The outer flap is
A pair of insertion pieces spaced apart from each other with the butted portions of the pair of inner flaps interposed therebetween;
A reinforcing portion formed between the pair of insertion pieces and bulging in an arc shape from the base end of one of the insertion pieces to the base end of the other insertion piece;
Have
The inner flap is
It has a pushing part that opens by pushing and inserts the insertion piece,
The vertex position of the arcuate edge of the reinforcing part is:
It is set closer to the proximal end side of the insertion piece than the distal end position of the insertion piece,
A packaging box characterized by that. 前記外フラップは、
前記補強部を挟む両側で且つ前記円弧状の縁の延長線上に係止用切込みを有し、
前記押込み部の開口縁は、
前記差込み片が前記押込み部に差込まれた状態において、前記係止用切込みに係止される係止部を有する、
ことを特徴とする請求項１に記載の包装箱。 The outer flap is
There are locking cuts on both sides of the reinforcing part and on the extension line of the arcuate edge,
The opening edge of the pushing portion is
In a state where the insertion piece is inserted into the pushing portion, it has a locking portion that is locked to the locking cut.
The packaging box according to claim 1. 前記押込み部の開口縁は、
前記差込み片が前記押込み部に差込まれて行く過程において、前記差込み片を前記内フラップの裏側に案内する凹状の丸み部を有する、
ことを特徴とする請求項１または２に記載の包装箱。 The opening edge of the pushing portion is
In the process in which the insertion piece is inserted into the pushing portion, the insertion piece has a concave round portion that guides the insertion piece to the back side of the inner flap.
The packaging box according to claim 1 or 2, wherein 前記押込み部の開口縁は、
前記差込み片が前記押込み部に差込まれた状態において、前記差込み片の外面を押圧する凸状の丸み部を有する、
ことを特徴とする請求項１〜３のいずれかに記載の包装箱。 The opening edge of the pushing portion is
In the state where the insertion piece is inserted into the pushing portion, it has a convex round portion that presses the outer surface of the insertion piece,
The packaging box according to any one of claims 1 to 3. 前記差込み片は、
先端縁の幅方向の端部に面取り部を有する、
ことを特徴とする請求項１〜４のいずれかに記載の包装箱。 The insertion piece is
A chamfered portion at the end in the width direction of the leading edge;
The packaging box according to any one of claims 1 to 4, wherein:
JP2013142098A 2013-07-05 2013-07-05 Packing box Pending JP2015013679A (en)

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Publications (1)

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024058487A (en) * 2022-10-14 2024-04-25 王子ホールディングス株式会社 Packing box

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5046662A (en) * 1990-11-02 1991-09-10 Inland Container Corporation Self-locking container
JPH07205954A (en) * 1994-01-24 1995-08-08 Tokyo Container Kogyo Kk Packaging box made of corrugated fiberboard
JP3171407U (en) * 2011-08-19 2011-10-27 児島段ボール株式会社 Cardboard box flap locking structure
JP2013039948A (en) * 2011-08-17 2013-02-28 Rengo Co Ltd Packaging box

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5046662A (en) * 1990-11-02 1991-09-10 Inland Container Corporation Self-locking container
JPH07205954A (en) * 1994-01-24 1995-08-08 Tokyo Container Kogyo Kk Packaging box made of corrugated fiberboard
JP2013039948A (en) * 2011-08-17 2013-02-28 Rengo Co Ltd Packaging box
JP3171407U (en) * 2011-08-19 2011-10-27 児島段ボール株式会社 Cardboard box flap locking structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024058487A (en) * 2022-10-14 2024-04-25 王子ホールディングス株式会社 Packing box

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