JP6188312B2

JP6188312B2 - Packaging bag

Info

Publication number: JP6188312B2
Application number: JP2012255171A
Authority: JP
Inventors: 長坂　茂明; 茂明長坂; 貴志半田
Original assignee: Pola Chemical Industries Inc
Current assignee: Pola Chemical Industries Inc
Priority date: 2012-11-21
Filing date: 2012-11-21
Publication date: 2017-08-30
Anticipated expiration: 2032-11-21
Also published as: JP2014101141A

Description

本発明は、シート材を重ね合わせて周縁部を接着し、重ね合わせたシート材間に被収容物を収容する包装袋に関する。 The present invention relates to a packaging bag in which sheet materials are overlapped and peripheral edges are adhered, and an object to be stored is accommodated between the overlapped sheet materials.

従来、化粧料や、食品、飲料、調味料、医薬品、洗剤等の被収容物を小分け包装する場合や詰め替え用に簡易包装する場合等に、パウチと称される包装袋が広く用いられている。このような包装袋は、例えば、基材層とシーラント層とを積層したシート材が重ね合わされて周縁部がシールされ、そのシールされた周縁部（以下シール部とも称す）で包囲されるように、各種の被収容物を収容しうる収容部を形成した構成からなる。 Conventionally, a packaging bag called a pouch has been widely used for packaging cosmetics, foods, beverages, seasonings, pharmaceuticals, detergents, and other contained items, or for simple packaging for refilling. . In such a packaging bag, for example, a sheet material obtained by laminating a base material layer and a sealant layer is overlapped so that a peripheral portion is sealed, and is surrounded by the sealed peripheral portion (hereinafter also referred to as a seal portion). And a configuration in which an accommodating portion capable of accommodating various objects is formed.

そして、このような包装袋においては、開封予定位置のシール部一側縁にノッチと称される開封起点部が形成され、その開封起点部を起点として引き裂くことにより、収容部が開封されて該収容部の一部に被収容物を取り出すことのできる取出口が形成されるように構成されている。従って、包装袋の開封時に収容部が必要以上に大きく引き裂かれると、被収容物が零れるおそれがある。 In such a packaging bag, an opening start point portion called a notch is formed at one side edge of the seal portion at the planned opening position, and the container is opened by tearing the opening start point portion as the starting point. A take-out port through which the object can be taken out is formed in a part of the containing portion. Therefore, if the storage portion is torn apart more than necessary when the packaging bag is opened, there is a possibility that the object to be stored will spill.

また、ユーザが包装袋のシール部を持ったまま引き続けると、被収容物を収容した包装袋本体からシール部の一部が切り離される。この切り離されたシール部（引き裂き片）は、包装袋本体と別に廃棄することになり、二度手間となってしまう。また、シート材からなる包装袋は、撓み易く、開封した状態で手を離すと被収容物が零れるおそれがあるので、片手で包装袋本体を把持したまま、もう一方の手で引き裂き片を廃棄することになり、不便であった。特に、被収容物が食品や医薬品である場合、引き裂き片を廃棄する際にゴミ箱の蓋等に手が触れると、被収容物の注出の前に片手で手を洗うことになり、非常に不便である。 Moreover, when a user continues pulling with the sealing part of the packaging bag, a part of the sealing part is separated from the packaging bag main body that accommodates the object to be accommodated. This separated seal portion (tear piece) is discarded separately from the packaging bag body, which is troublesome twice. In addition, the packaging bag made of sheet material is easy to bend, and if the hand is released in the opened state, there is a risk that the contents will be spilled, so discard the tear piece with the other hand while holding the packaging bag body with one hand. It was inconvenient. In particular, if the item to be contained is food or medicine, touching the lid of the trash bin when discarding the tear pieces will wash your hand with one hand before the containment item is poured out. Inconvenient.

また、引き裂き片を一旦置き、包装袋本体内の被収容物を排出した後に、引き裂き片を包装袋本体と共に廃棄することもできるが、引き裂き片を載置すると、引き裂き片内壁に付着していた被収容物が載置面に垂れ、廃棄後に当該載置面を清掃しなければならず手間が増えてしまう。 In addition, the tear piece can be disposed with the packaging bag body after the tear piece is temporarily placed and discharged from the packaging bag body. However, when the tear piece is placed, the tear piece is attached to the inner wall of the tear piece. The object to be stored hangs down on the placement surface, and the placement surface must be cleaned after disposal, which increases the labor.

このため、開封時の引き裂きを予定の位置で止め、引き裂き片を包装袋本体に確実に残すようにした包装袋が提案されている（例えば特許文献１〜３）。 For this reason, a packaging bag has been proposed in which tearing at the time of opening is stopped at a predetermined position and the tear piece is reliably left in the packaging bag body (for example, Patent Documents 1 to 3).

特開２００９−２５５９５９号公報JP 2009-255959 A 特開２００７−２７６８２３号公報JP 2007-276823 A 特開２００２−２８４１９２号公報JP 2002-284192 A

図１５は、特許文献１に記載された包装袋の平面図である。特許文献１に記載された包装袋９０は、開封起点部９１から開始される引き裂きを停止させる予定位置に、開封起点部９１に向けて凹とした半円状の切り込みによって第一ストッパー９２が形成されている。 FIG. 15 is a plan view of the packaging bag described in Patent Document 1. FIG. In the packaging bag 90 described in Patent Document 1, a first stopper 92 is formed by a semicircular cut that is concave toward the opening start point 91 at a position where tearing started from the opening start point 91 is stopped. Has been.

ユーザは、包装袋９０の開封起点部９１近傍の包装袋本体側縁部９３Ａと切り裂き片側縁部９３Ｂとを保持し、切り裂き予定線９４で剪断するように縁部９３Ａと縁部９３Ｂを引き離すことにより包装袋９０を引き裂いて開封する。特許文献１では、切り裂き予定線９４と交差する方向に切り込み（第一ストッパー）９２が形成されているため、切り裂き伝播が止まると記載されているが、開封起点部９１に向けて凹とした半円状の切り込みであると、開封起点部９１からの裂け目が図１６に示すように第一ストッパー９２に達した場合にも、引き裂く力が裂け目の先端の一か所９５に集中するため、この力の収集する箇所９５から引き裂かれることになり、引き裂きを充分に停止できない。 The user holds the packaging bag main body side edge portion 93A and the tear piece side edge portion 93B in the vicinity of the unsealing start point portion 91 of the packaging bag 90, and pulls the edge portion 93A and the edge portion 93B apart so as to shear along the planned tear line 94. The packaging bag 90 is torn and opened. In Patent Literature 1, it is described that the notch (first stopper) 92 is formed in a direction intersecting the planned tear line 94, so that the tear propagation stops, but the half that is concave toward the opening start point 91 is described. If the slit is a circular cut, the tearing force concentrates at one point 95 at the tip of the tear even when the tear from the opening starting point 91 reaches the first stopper 92 as shown in FIG. It will be torn from the point 95 where the force is collected, and tearing cannot be stopped sufficiently.

本発明は、以上のような事情に鑑みてなされたものであって、開封時の引き裂きを予定の位置で確実に止める技術の提供を目的とする。 This invention is made | formed in view of the above situations, Comprising: It aims at provision of the technique which stops tearing at the time of opening reliably at a predetermined position.

上記課題を解決するため、本発明は、以下の構成を採用した。
即ち、本発明の包装袋は、シート材を厚み方向に重ね合わせた状態で縁部を接着することで前記重ね合わせたシート間に被収容物を収容する収容部を形成し、前記シート材の接着部分を予め定めた引き裂き予定位置で引き裂くことにより前記収容部の開封が可能であって、
前記引き裂き予定位置で引き裂いて開封する際の起点となる開封起点部と、
前記開封時に前記開封起点部から開始したシート材の引き裂きを停止させるべき位置として予め定められた停止予定位置に、前記開封起点部に向けて凸状の切り込みによって形成された開封停止部と、
を備えた。 In order to solve the above problems, the present invention employs the following configuration.
That is, the packaging bag of the present invention forms an accommodating portion for accommodating an object to be accommodated between the overlapped sheets by adhering edges in a state where the sheet material is overlapped in the thickness direction, The container can be opened by tearing the adhesive part at a predetermined tearing position,
An opening starting point portion which becomes a starting point when tearing and opening at the planned tearing position;
An opening stop portion formed by a convex cut toward the opening start point at a predetermined stop position as a position to stop tearing of the sheet material started from the opening start point at the time of opening;
Equipped with.

前記包装袋は、前記開封起点部から前記開封停止部への引き裂き予定方向に対して、前記開封停止部の切り込みの端部が傾きを有しても良い。 As for the said packaging bag, the edge part of the notch | incision of the said opening stop part may have inclination with respect to the tearing planned direction from the said opening starting point part to the said opening stop part.

前記包装袋は、前記開封起点部から前記引き裂き予定位置で引き裂く際の引き裂き予定方向に、前記開封停止部を複数並設しても良い。 The packaging bag may have a plurality of opening stop portions arranged in parallel in a planned tearing direction when tearing at the planned tearing position from the opening starting point.

また、前記包装袋は、前記複数の開封停止部の一つを第一開封停止部とし、当該第一開封停止部を形成する前記切り込みの端部の前記引き裂き予定方向下流側に第二開封停止部を設けても良い。
前記包装袋は、前記引き裂き予定位置の少なくとも一部に他の部分よりも引裂強度の低い脆弱線を設けても良い。 In addition, the packaging bag has one of the plurality of opening stop portions as a first opening stop portion, and the second opening stop at the downstream side in the planned tearing direction of the end portion of the cut forming the first opening stop portion. A part may be provided.
The packaging bag may be provided with a weak line having a tear strength lower than that of other portions at least at a part of the planned tearing position.

本発明によれば、開封時の引き裂きを予定の位置で確実に止める技術を提供できる。 ADVANTAGE OF THE INVENTION According to this invention, the technique which stops tearing at the time of opening reliably at a predetermined position can be provided.

図１は、本発明の実施形態１に係る包装袋の平面図である。FIG. 1 is a plan view of a packaging bag according to Embodiment 1 of the present invention. 図２は、図１のＡ−Ａ矢視部分の拡大横断面である。FIG. 2 is an enlarged cross section taken along the line AA in FIG. 図３は、開封時の説明図である。FIG. 3 is an explanatory diagram at the time of opening. 図４は、開封停止部の形状の説明図である。FIG. 4 is an explanatory diagram of the shape of the opening stop portion. 図５は、本発明の実施形態２に係る包装袋の一例を示す図である。FIG. 5 is a diagram illustrating an example of a packaging bag according to Embodiment 2 of the present invention. 図５は、本発明の実施形態２に係る包装袋の開封時の説明図である。FIG. 5 is an explanatory diagram when the packaging bag according to the second embodiment of the present invention is opened. 図７は、図５，図６におけるＢ−Ｂ矢視部分の拡大縦断面図である。FIG. 7 is an enlarged longitudinal sectional view taken along the line BB in FIGS. 5 and 6. 図８は、本発明の実施形態３に係る包装袋の一例を示す図である。FIG. 8 is a diagram illustrating an example of a packaging bag according to Embodiment 3 of the present invention. 図９は、第二開封停止部の構成例を示す図である。FIG. 9 is a diagram illustrating a configuration example of the second opening stop unit. 図１０は、切り込み端部の向きと引き裂き予定方向が並行な場合を示す図である。FIG. 10 is a diagram illustrating a case where the direction of the cut end and the planned tear direction are parallel. 図１１は、変形例を示す図である。FIG. 11 is a diagram illustrating a modification. 図１２は、変形例を示す図である。FIG. 12 is a diagram illustrating a modification. 図１３は、変形例を示す図である。FIG. 13 is a diagram illustrating a modification. 図１４は、変形例を示す図である。FIG. 14 is a diagram showing a modification. 図１５は、従来の包装袋を示す図である。FIG. 15 is a view showing a conventional packaging bag. 図１６は、従来例の説明図である。FIG. 16 is an explanatory diagram of a conventional example.

以下、図面を参照して、本発明の一実施形態に係る包装袋について説明する。以下の実施形態の構成は例示であり、本包装袋は実施形態の構成に限定されない。
〈実施形態１〉
以下、本発明の実施形態について図面を参照しながら説明する。図１および図２は、本発明の実施形態の一例を示し、図１は、包装袋の平面図であり、図２は、図１のＡ−Ａ矢視部分の拡大横断面図である。なお、本実施形態では、便宜上Ｙ方向を上下方向或いは縦方向とし、Ｘ方向を左右方向或いは横方向として示す。 Hereinafter, a packaging bag according to an embodiment of the present invention will be described with reference to the drawings. The structure of the following embodiment is an illustration and this packaging bag is not limited to the structure of embodiment.
<Embodiment 1>
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 show an example of an embodiment of the present invention, FIG. 1 is a plan view of a packaging bag, and FIG. 2 is an enlarged cross-sectional view taken along the line AA in FIG. In the present embodiment, for convenience, the Y direction is indicated as the vertical direction or the vertical direction, and the X direction is indicated as the horizontal direction or the horizontal direction.

包装袋１０は、２枚のシート材１，２を互いに重ね合わせ、両シート材１，２の周縁部同士をヒートシール（熱接着）や、超音波シール等によって接着させることにより、袋状に形成されている。図１中、両シート材１，２が接着した部分（以下シール部とも称す）と非接着部分との境界を破線３１で示し、破線３１の外側がシール部１２である。本実施形態の包装袋１０は、シート材１，２の４方をシールした所謂４方シールで形成されている。 The packaging bag 10 is formed into a bag shape by overlapping two sheet materials 1 and 2 and bonding the peripheral portions of both sheet materials 1 and 2 by heat sealing (thermal bonding), ultrasonic sealing, or the like. Is formed. In FIG. 1, a boundary between a portion where both the sheet materials 1 and 2 are bonded (hereinafter also referred to as a seal portion) and a non-bonded portion is indicated by a broken line 31, and the outside of the broken line 31 is a seal portion 12. The packaging bag 10 of the present embodiment is formed by a so-called four-side seal in which the four sides of the sheet materials 1 and 2 are sealed.

包装袋１０は、４方のシール部１２と両シート材内面とで囲まれた収容部３を有した袋状に形成される。包装袋１０は、例えば４方のシール部のうち、３方のシール部がシールされた状態で、被収容物、例えば洗顔料、ローション、乳液、ファンデーション、クリーム、香水、制汗剤、シャンプー、コンディショナー、歯磨剤などの化粧品が収容部３に充填された後、残りの１方のシール部が封止される。 The packaging bag 10 is formed in a bag shape having the accommodating portion 3 surrounded by the four seal portions 12 and the inner surfaces of both sheet materials. The packaging bag 10 is, for example, in a state in which three of the four sealing portions are sealed, and to-be-contained items such as a facial cleanser, lotion, emulsion, foundation, cream, perfume, antiperspirant, shampoo, After cosmetics such as a conditioner and a dentifrice are filled in the container 3, the remaining one seal is sealed.

各シート材１，２は、それぞれ基材層１８，２８とシーラント層１９，２９とを積層して形成されている。シート材１，２を構成する材料は特に限定されず、内容物の種類や性状、充填量などに応じて適宜選択すればよい。 Each of the sheet materials 1 and 2 is formed by laminating base material layers 18 and 28 and sealant layers 19 and 29, respectively. The material which comprises the sheet | seat materials 1 and 2 is not specifically limited, What is necessary is just to select suitably according to the kind and property of a content, a filling amount, etc.

基材層１８，２８の材料としては、例えばポリエチレンテレフタレート、ポリプロピレン、ナイロン等の合成樹脂フィルム、紙、セロファンなどが使用される。基材層１８，２８は、これらの材料を二軸延伸したフィルムであっても良いし、一軸延伸して引き裂き予定方向（例えば横方向）に易開封性を持たせフィルムであっても良い。また、基材層１８，２８は、これらの材料のうち、単一の材料で形成されても良いし、複数の材料を積層して形成されても良い。基材層１８，２８には、更にバリヤー層として、アルミ箔やアルミ蒸着層が積層されても良い。 As a material of the base material layers 18 and 28, for example, synthetic resin films such as polyethylene terephthalate, polypropylene, and nylon, paper, cellophane, and the like are used. The base material layers 18 and 28 may be a film obtained by biaxially stretching these materials, or may be a film that is uniaxially stretched so as to be easily opened in a planned tearing direction (for example, a lateral direction). Moreover, the base material layers 18 and 28 may be formed of a single material among these materials, or may be formed by stacking a plurality of materials. The base material layers 18 and 28 may be further laminated with an aluminum foil or an aluminum vapor deposition layer as a barrier layer.

シーラント層１９，２９の材料としては、例えばポリエチレン、ポリプロピレン、エチレン−酢酸ビニル共重合体、エチレン−アクリル酸共重合体、エチレン−メタクリル酸共重合体、エチレン−メチルアクリレート共重合体、エチレン−エチルアクリレート共重合体、エチレン−メチルメタクリレート共重合体、アイオノマーなどの熱可塑性合成樹脂が使用される。基材層１８，２８とシーラント層１９，２９との積層方法は特に限定されないが、例えば、ドライラミネート法や押出しコーティング法などが用いられる。なお、シーラント層１９，２９は、基材層１８，２８の全面に積層されたものに限らず、少なくともシート材１，２のシール部となる部分に積層されたもの、例えばパートコートされたものであれば良い。シーラント層１９，２９をパートコートする場合、シーラント層１９，２９の材料は、粘着剤であっても良い。 Examples of the material for the sealant layers 19 and 29 include polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl acrylate copolymer, and ethylene-ethyl. A thermoplastic synthetic resin such as an acrylate copolymer, an ethylene-methyl methacrylate copolymer, or an ionomer is used. The method for laminating the base material layers 18 and 28 and the sealant layers 19 and 29 is not particularly limited. For example, a dry laminating method or an extrusion coating method is used. The sealant layers 19 and 29 are not limited to those laminated on the entire surface of the base material layers 18 and 28, but are laminated at least on the portions to be the seal portions of the sheet materials 1 and 2, for example, part-coated. If it is good. When the sealant layers 19 and 29 are part-coated, the material of the sealant layers 19 and 29 may be an adhesive.

シール部１２の一部には、開封時に引き裂きを開始する開封起点部２４として、開封用ノッチが形設される。図１では、包装袋１０の一辺（左辺）を成すシール部１２の外縁に、対向する他辺（右辺）へ向けて鋭角に切り欠いたＶ字状のノッチ（Ｖノッチ）２４が設けられている。なお、開封用ノッチの形状は、これに限らず、ホームベース状の切り欠き（ベースノッチ）や他辺（右辺）へ向けて弧状に切り欠いたＵ字状のノッチ（Ｕノッチ）、Ｉ字状の切り込み（Ｉノッチ）であっても良い。なお、開封起点部２４は、切り欠きや切り込みに限らず、開封の起点であることを示す目印を印刷等で付したものでも良い。この場合、一軸延伸して引き裂き予定方向に易開封性を持たせたフィルムを用いるのが望ましい。例えば図１の左右方向に易開封性を持たせたフィルムで図１の包装袋１０を作成し、左辺外縁に開封起点部２４を印刷によって示す。 A part of the seal part 12 is formed with a notch for opening as an opening starting point part 24 that starts tearing at the time of opening. In FIG. 1, a V-shaped notch (V notch) 24 is provided at the outer edge of the seal portion 12 that forms one side (left side) of the packaging bag 10 and is cut out at an acute angle toward the opposite side (right side). Yes. The shape of the notch for opening is not limited to this, but a notch (base notch) in the form of a home base, a U-shaped notch (U notch) cut out in an arc shape toward the other side (right side), I-shape A notch (I notch) may be used. The opening start point 24 is not limited to a notch or notch, and may be a mark indicating that it is the opening start point by printing or the like. In this case, it is desirable to use a film that has been uniaxially stretched so that it can be easily opened in the direction to be torn. For example, the packaging bag 10 of FIG. 1 is made of a film having easy opening in the left-right direction of FIG. 1, and the opening starting point 24 is shown by printing on the outer edge of the left side.

また、包装袋１０は、開封用ノッチ２４から引き裂き予定方向、本例では左右方向（Ｘ方向）に引き裂かれた際の引き裂きを停止させる予定位置に開封停止部２５が設けられている。開封停止部２５は、開封用ノッチ２４側に向けて凸とした孤状の切り込み２５Ａによって形成される。切り込み２５Ａは、両シート材１，２に設けられても良いし、シート材１或いはシート材２の一方に設けられたものでも良い。シート材１又はシート材２の一方に切り込みを形成する方法は特に限定されないが、例えば、シート材１，２同士を熱接着させる前にシート材１又はシート材２を弧状に打ち抜くか押し切るなどして切り込み２５Ａを設ければ良い。 Further, the packaging bag 10 is provided with an opening stopping portion 25 at a planned position for stopping the tearing when the bag is torn from the opening notch 24 in the planned tearing direction, in this example, the left-right direction (X direction). The opening stop portion 25 is formed by an arcuate cut 25A that protrudes toward the opening notch 24 side. The cuts 25 A may be provided in both the sheet materials 1 and 2, or may be provided in one of the sheet material 1 or the sheet material 2. The method for forming the cut in one of the sheet material 1 or the sheet material 2 is not particularly limited. For example, the sheet material 1 or the sheet material 2 is punched out or pressed into an arc before the sheet materials 1 and 2 are thermally bonded to each other. The cut 25A may be provided.

包装袋１０の上記開封用ノッチ２４と開封停止部２５との間が引き裂き予定位置（以下引き裂き予定線とも称す）２６であり、図１に二点鎖線で示す。 A space between the opening notch 24 and the opening stopping portion 25 of the packaging bag 10 is a planned tearing position (hereinafter also referred to as a planned tearing line) 26, which is indicated by a two-dot chain line in FIG.

包装袋１０の収容部３は、その一部３Ａが開封予定線２６よりも外側へ突出するように形成される。このため開封予定位置でシート材１，２が引き裂かれると、シート材１，２の接着していない収容部３の一部分３Ａが開口し、被収容物の注出口となる。 The accommodating part 3 of the packaging bag 10 is formed such that a part 3 A protrudes outside the planned opening line 26. For this reason, when the sheet materials 1 and 2 are torn at the planned opening position, a part 3A of the accommodating portion 3 to which the sheet materials 1 and 2 are not bonded opens and serves as a spout for the object to be accommodated.

図３は、開封時の説明図である。包装袋１０は、図３（Ａ）に示すように、ユーザが開封用ノッチ２４を挟み下方の本体側縁部１２Ａと上方の引き裂き片側縁部１２Ｂとを持ち、シート材１，２を引き裂き予定線２６で剪断するように本体側縁部１２Ａに対して引き裂き片側縁部１２Ｂとを引き離す。これにより開封用ノッチ２４の鋭角部分に剪断方向の力がかかり、シート材１，２が裂け始める。この状態でユーザが更に引き裂き片側縁部１２Ｂを引き続けることで、裂け目の先端に剪断方向の力が継続してかかり、図３Ｂに示すように裂け目が引き裂き予定方向に進行する。 FIG. 3 is an explanatory diagram at the time of opening. As shown in FIG. 3A, the packaging bag 10 has a lower body side edge 12A and an upper tear side edge 12B across the notch 24 for opening, and will tear the sheet materials 1 and 2 The tear side edge 12B is separated from the main body side edge 12A so as to be sheared by the wire 26. As a result, a shearing direction force is applied to the acute angle portion of the opening notch 24, and the sheet materials 1 and 2 begin to tear. In this state, when the user continues to pull the tear piece side edge portion 12B, a shearing force is continuously applied to the tip of the tear, and the tear advances in the planned tear direction as shown in FIG. 3B.

そして、裂け目が開封停止部２５に達し、裂け目と切り込み２５Ａとがつながると、図３（Ｃ）に示すようにユーザが本体側縁部１２Ａと引き裂き片側縁部１２Ｂとを引き離す力が、切り込み２５Ａの引き裂き予定方向下流側端部の二カ所Ａ１，Ａ２に分散してかかることになり、剪断力として働かなくなるため、引き裂きが停止する。 When the tear reaches the unsealing stop portion 25 and the tear and the cut 25A are connected, the force by which the user separates the main body side edge portion 12A and the tear piece side edge portion 12B as shown in FIG. Since it is dispersed and applied to the two locations A1 and A2 at the downstream end portion in the planned tear direction, tearing stops because it does not work as a shearing force.

また、開封する際、力を必要以上にかけ過ぎると、被収容物が飛散することや、裂け目が収容部３に及んで被収容物がこぼれてしまうことがあるため、通常、ユーザは力加減しながらシート材１，２を引き裂く。例えばユーザは、図３（Ａ）の如く本体側縁部１２Ａと引き裂き片側縁部１２Ｂとを引き離すように力をかけ、開封用ノッチ２４からシート材１，２が裂け始めた場合、このときの力を維持して引き裂きを行う。なお、裂け目が非接着部分３Ａに達して引き裂きにくくなることで引き裂く際の抵抗が増した場合、ユーザは、本体側縁部１２Ａ及び引き裂き片側縁部１２Ｂを引く力を増し、裂け目が非接着部分３Ａを越え、シール部に達して引き裂き易くなることで引き裂く際の抵抗が減った場合には本体側縁部１２Ａ及び引き裂き片側縁部１２Ｂを引く力を減じるといったように、シート材１，２を引き裂く際の抵抗の大きさに応じて力加減を行う。このため、裂け目が切り込み２５Ａとつながると、この瞬間、シート材１，２を引き裂く際の抵抗が急に無くなるので、これに合わせてシート材を引き裂く力を無くそうとユーザが反射的に手を止めるため、引き裂きが停止する。 In addition, when the opening is unnecessarily applied, if the force is applied excessively, the object to be stored may scatter or the tear may reach the container 3 and the object to be spilled. While tearing the sheet materials 1 and 2. For example, when the user applies force to separate the main body side edge 12A and the tear piece side edge 12B as shown in FIG. 3A and the sheet materials 1 and 2 start to tear from the opening notch 24, Keep the force and tear. In addition, when resistance at the time of tearing increases because the tear reaches the non-adhesive portion 3A and becomes difficult to tear, the user increases the force to pull the main body side edge portion 12A and the tear piece side edge portion 12B, and the tear becomes the non-adhesive portion. When the resistance at the time of tearing is reduced by exceeding the 3A and reaching the seal part and being easily torn, the force of pulling the main body side edge part 12A and the tearing side edge part 12B is reduced. The force is adjusted according to the resistance when tearing. For this reason, when the tear is connected to the cut 25A, the resistance at the time of tearing the sheet materials 1 and 2 suddenly disappears. Therefore, the user reflexively tries to eliminate the force of tearing the sheet material accordingly. The tearing stops to stop.

図４は開封停止部２５の形状の説明図である。図４においてＸ方向が図１に示す包装袋の横方向、即ち引き裂き予定方向であり、Ｙ方向が図１に示す包装袋の縦方向である。 FIG. 4 is an explanatory diagram of the shape of the opening stop portion 25. In FIG. 4, the X direction is the lateral direction of the packaging bag shown in FIG. 1, that is, the tearing direction, and the Y direction is the longitudinal direction of the packaging bag shown in FIG.

図４に示すように開封停止部２５は、シート材１，２に形成された半円状の切り込み２５Ａを有している。この切り込み２５Ａと切り込み２５Ａの周囲のシート材１，２が開封停止部２５として機能する。 As shown in FIG. 4, the opening stop portion 25 has a semicircular cut 25 A formed in the sheet materials 1 and 2. The cuts 25 A and the sheet materials 1 and 2 around the cuts 25 A function as the opening stop portion 25.

切り込み２５Ａは、前記開封起点部２４（図１）に向けて凸状であり、前述のように開封時にシート材１，２を引き裂く力を引き裂き予定方向下流側端部の二カ所Ａ１，Ａ２に分散する。このように引き裂く力をＹ方向に離間した二カ所Ａ１，Ａ２に分散させることで、シート材１，２を剪断する力が働かなくなり、シート材１，２の引き裂きが止まる。従って、切り込み２５Ａの引き裂き予定方向下流側端部Ａ１，Ａ２のＹ方向（引き裂き予定方向と直交方向）における離間距離Ｌｙを所定値以上とする。例えば、離間距離Ｌｙは、３ｍｍ以上が望ましく、５ｍｍ以上が更に望ましい。なお、離間距離Ｌｙを大きくすると、切り込み２５Ａを形成するシール部のＹ方向の幅を大きくとらなければならず、包装袋の大型化を招き易い。このため、例えば離間距離Ｌｙを２０ｍｍ以下、望ましくは１０〜５ｍｍとする。 The notch 25A is convex toward the opening start point 24 (FIG. 1), and the force for tearing the sheet materials 1 and 2 at the time of opening as described above is applied to the two points A1 and A2 at the downstream end in the tearing direction. scatter. By dispersing the tearing force in two places A1 and A2 separated in the Y direction, the shearing force of the sheet materials 1 and 2 does not work, and the tearing of the sheet materials 1 and 2 stops. Accordingly, the separation distance Ly in the Y direction (the direction orthogonal to the planned tear direction) of the downstream side ends A1 and A2 of the cut 25A in the planned tear direction is set to a predetermined value or more. For example, the separation distance Ly is preferably 3 mm or more, and more preferably 5 mm or more. In addition, when the separation distance Ly is increased, the width in the Y direction of the seal portion that forms the cut 25A must be increased, which tends to increase the size of the packaging bag. For this reason, for example, the separation distance Ly is set to 20 mm or less, preferably 10 to 5 mm.

また、切り込み２５Ａは、開封時の裂け目とつながった際に、シート材１，２を引き裂く際の抵抗を急に無くすことで、反射的にユーザの手を止めさせて、シート材の引き裂きを停止させる。従って、切り込み２５Ａの引き裂き予定方向（Ｘ方向）における長さＬｘを所定値以上とする。例えば、長さＬｘは、１ｍｍ以上が望ましく、３ｍｍ以上が更に望ましい。なお、長さＬｘを大きくし過ぎると、輸送時に切り込み２５Ａが引っかかって破損の原因になり易い。このため、例えば長さＬｘを１５ｍｍ以下、望ましくは１０〜５ｍｍとする。
このように、本実施形態１によれば、開封時の引き裂きを予定の位置で確実に止めることができる。 In addition, when the cut 25A is connected to a tear at the time of opening, the resistance when tearing the sheet materials 1 and 2 is abruptly eliminated, so that the user's hand is reflexively stopped and the tearing of the sheet material is stopped. Let Therefore, the length Lx of the notch 25A in the planned tear direction (X direction) is set to a predetermined value or more. For example, the length Lx is preferably 1 mm or more, and more preferably 3 mm or more. If the length Lx is excessively increased, the cut 25A is caught during transportation, which may cause damage. For this reason, for example, the length Lx is set to 15 mm or less, preferably 10 to 5 mm.
Thus, according to the first embodiment, tearing at the time of opening can be reliably stopped at a predetermined position.

〈実施形態２〉
図５は、本発明の実施形態２に係る包装袋の一例を示す図である。本実施形態２の包装袋１０Ａは、前述の実施形態１と比べて開封起点部２４と開封停止部２５の間に開封誘導線２１を設けた点が異なっている。なお、本実施形態２において、その他の構成は実施形態１と同じであるので、同一の要素に同符号を付すなどして再度の説明を省略する。 <Embodiment 2>
FIG. 5 is a diagram illustrating an example of a packaging bag according to Embodiment 2 of the present invention. The packaging bag 10A of the second embodiment is different from the first embodiment in that an opening guide line 21 is provided between the opening start point 24 and the opening stop portion 25. In addition, in this Embodiment 2, since the other structure is the same as Embodiment 1, it abbreviate | omits description by attaching | subjecting the same code | symbol to the same element.

開封誘導線２１は、シート材１，２に形成された切り込みやハーフカット、ミシン目等の脆弱線である。開封誘導線２１は、シート材１，２の他の部分に比べて引裂強度の低い脆弱な構造であるため、他の部分よりも裂け易く、開封起点部２４から引き裂かれた際の裂け目が、この開封誘導線２１に沿って進行することになるので、この裂け目を開封停止部２５に誘導できる。 The opening guide line 21 is a weak line such as a cut, a half cut, or a perforation formed in the sheet materials 1 and 2. Since the opening guide line 21 is a fragile structure having a lower tear strength than the other parts of the sheet materials 1 and 2, it is easier to tear than the other parts, and the tear when it is torn from the opening starting point 24, Since the process proceeds along the opening guide line 21, the tear can be guided to the opening stop portion 25.

また、図５の例では、注出口となる部分３Ａよりも引き裂き予定方向下流側に開封誘導線２１を設けたが、これに限らず、図６に示すように開封起点部２４から注出口となる部分３Ａを通り開封停止部２５にわたって開封誘導線２１を設けても良い。
図７は、図５，図６におけるＢ−Ｂ矢視部分の拡大縦断面図であり、開封誘導線２１の構成例を示す。
図７（Ａ）は、シート材１，２を貫通した開封誘導線２１を設けた例である。図７（Ａ）では、一断面のみを示したが、開封誘導線２１は、全ての断面が図７（Ａ）と同様の連続した切り込みであっても良いし、図７（Ａ）のように貫通した切り込みのある部分と切り込みの無い部分とが断続的に続く、所謂ミシン目であっても良い。図７（Ａ）に示す開封誘導線２１は、例えばシート材１，２をシールした後に、開封誘導線２１の形状に合わせた刃で打ち抜く、カッターで押し切る、或いは熱線やレーザ等で溶断することにより形成される。なお、図７（Ａ）では、開封誘導線２１を便宜上、溝のように示したが、開封誘導線２１は、溝のように空隙を有した構造に限らず、カッターで押し切った場合のように隙間の無い切れ目のみの構造であっても良い。これは以下の図７（Ｂ）〜図７（Ｆ）についても同じである。 Further, in the example of FIG. 5, the opening guide line 21 is provided on the downstream side in the planned tearing direction from the portion 3 A serving as the spout, but this is not limiting, and as shown in FIG. The opening guide wire 21 may be provided over the opening stop portion 25 through the portion 3A.
FIG. 7 is an enlarged vertical cross-sectional view taken along the line BB in FIGS. 5 and 6, and shows a configuration example of the opening guide line 21.
FIG. 7A shows an example in which an opening guide wire 21 penetrating the sheet materials 1 and 2 is provided. Although FIG. 7A shows only one section, the unsealing guide line 21 may be a continuous cut similar to FIG. 7A for all the sections, or as shown in FIG. A so-called perforation may be used in which a portion having a notch penetrating through and a portion having no notch continue intermittently. 7A, for example, after sealing the sheet materials 1 and 2, the opening guide wire 21 is punched with a blade that matches the shape of the opening guide wire 21, pressed with a cutter, or fused with a heat ray or a laser. It is formed by. In FIG. 7A, the opening guide wire 21 is shown as a groove for convenience, but the opening guide wire 21 is not limited to a structure having a gap like a groove, and is like when it is pushed out with a cutter. It may be a structure with only a gap without gaps. The same applies to the following FIGS. 7B to 7F.

図７（Ｂ）は、シート材１，２の一方（図７（Ｂ）の例ではシート材２）の表裏に貫通した切り込みを設けた開封誘導線２１の例である。図７（Ｂ）の例においても、前述の図７（Ａ）と同様に開封誘導線２１は、連続した切り込みであっても断続的な切り込み（ミシン目）であっても良い。図７（Ｂ）に示す開封誘導線２１は、例えばシート材１，２をシールする前に一方のシート材（２）を開封誘導線２１の形状に合わせた刃で打ち抜く或いはカッターで押し切る、或いは熱線やレーザ等で溶断することにより形成される。 FIG. 7B is an example of the unsealing guide wire 21 provided with notches penetrating the front and back of one of the sheet materials 1 and 2 (the sheet material 2 in the example of FIG. 7B). Also in the example of FIG. 7B, the unsealing guide wire 21 may be a continuous cut or an intermittent cut (perforation) as in the case of FIG. 7A. 7 (B), for example, before sealing the sheet materials 1 and 2, punch out one sheet material (2) with a blade that matches the shape of the opening guide wire 21, or push it out with a cutter. It is formed by fusing with a hot wire or a laser.

図７（Ｃ）は、シート材１，２の一部に非貫通(ハーフカット)の切り込みを設けた開封誘導線２１の例である。図７（Ｃ）に示す開封誘導線２１は、例えばハーフカット用のカッターでシート材１，２の基材層１８，２８を厚み方向の途中までカットすることにより形成される。また、開封誘導線２１は、例えばレーザの照射により基材層１８，２８を局部的に溶融させて、厚み方向の途中までをカットすることにより形成される。 FIG. 7C is an example of the opening guide wire 21 in which a part of the sheet materials 1 and 2 is provided with a non-penetrating (half cut) cut. The opening guide line 21 shown in FIG. 7C is formed by cutting the base material layers 18 and 28 of the sheet materials 1 and 2 halfway in the thickness direction, for example, with a half-cutting cutter. Further, the unsealing guide line 21 is formed by, for example, locally melting the base material layers 18 and 28 by laser irradiation and cutting halfway in the thickness direction.

図７（Ｄ）は、シート材１，２を多層化し、その一部の層に切り込みを設けた開封誘導線２１の例である。図７（Ｄ）の開封誘導線２１は、シート材１，２の基材層１８，２８の外側に保護層１７，２７が積層され、この保護層１７，２７に切り込みを有する。図７（Ｄ）に示す開封誘導線２１は、例えば保護層１７，２７を開封誘導線２１の形状に合わせた刃で打ち抜く或いはカッターで押し切る、或いは熱線やレーザ等で溶断することにより切り込みを形成し、この保護層１７，２７を基材層１８，２８の外側にラミネートすることにより形成される。また、開封誘導線２１は、シート材１，２の基材層１８，２８の外側に積層された保護層１７，２７をハーフカット用のカッター或いはレーザの照射によってカットすることにより形成される。 FIG. 7D shows an example of the opening guide wire 21 in which the sheet materials 1 and 2 are multi-layered and a cut is provided in a part of the layers. 7 (D), the protective layers 17 and 27 are laminated on the outer sides of the base material layers 18 and 28 of the sheet materials 1 and 2, and the protective layers 17 and 27 have cuts. The opening guide wire 21 shown in FIG. 7D is formed by, for example, punching the protective layers 17 and 27 with a blade matched to the shape of the opening guide wire 21 or pushing it with a cutter, or by fusing with a heat ray or a laser. The protective layers 17 and 27 are formed by laminating the base layers 18 and 28 outside. Further, the unsealing guide wire 21 is formed by cutting the protective layers 17 and 27 laminated on the outer sides of the base material layers 18 and 28 of the sheet materials 1 and 2 by half-cutting cutter or laser irradiation.

図７（Ｅ）は、シート材１，２の引き裂き予定線２６の上下に案内部材を設けた開封誘導線２１の例である。案内部材２２は引き裂き予定方向に長手の帯状の部材であり、上辺を引き裂き予定線２６に沿わせて、その下側（本体側）に設けられた本体側案内部材２２１と、下辺を引き裂き予定線２６に沿わせて、その上側（引裂片側）に設けられた引裂片側案内部材２２２とをシート材１，２の両面に有する。案内部材２２は、例えば製袋後にシート材１，２の外面に貼付しても良いし、シート材１，２の各層を積層する際に綴じ込んでも良い。このように案内部材２２を設けたことにより、案内部材を設けた箇所が補強されて引き裂き強度が上がり、この箇所に対して本体側案内部材２２１と引裂片側案内部材２２２の境界部分の引き裂き強度が相対的に低くなり、この境界部分が開封誘導線２１となる。 FIG. 7E is an example of the opening guide line 21 in which guide members are provided above and below the planned tear line 26 of the sheet materials 1 and 2. The guide member 22 is a band-shaped member that is long in the planned tear direction, and has a main body side guide member 221 provided on the lower side (main body side) along the upper tear line 26 and a lower tear line. 26, the tear piece side guide member 222 provided on the upper side (the tear piece side) is provided on both surfaces of the sheet materials 1 and 2. For example, the guide member 22 may be affixed to the outer surfaces of the sheet materials 1 and 2 after bag making, or may be bound when the layers of the sheet materials 1 and 2 are laminated. By providing the guide member 22 in this manner, the portion where the guide member is provided is reinforced and the tear strength is increased, and the tear strength at the boundary between the main body side guide member 221 and the tear piece side guide member 222 is increased with respect to this portion. It becomes relatively low, and this boundary portion becomes the opening guide line 21.

なお、図７（Ｅ）では案内部材２２を包装袋１０Ａの外面に設けた例を示したが、案内部材２２は包装袋１０Ａの内面に設けられても良い。また、図７（Ｅ）では案内部材２２を包装袋１０Ａの両面に設けた例を示したが、片面のみに設けても良い。更に、案内部材２２は、本体側案内部材２２１又は引裂片側案内部材２２２の一方を有する構成でも良い。 Although FIG. 7E shows an example in which the guide member 22 is provided on the outer surface of the packaging bag 10A, the guide member 22 may be provided on the inner surface of the packaging bag 10A. Moreover, although the example which provided the guide member 22 in both surfaces of 10 A of packaging bags was shown in FIG.7 (E), you may provide in only one side. Further, the guide member 22 may have one of the main body side guide member 221 and the tear piece side guide member 222.

図７（Ｆ）は、包装袋１０Ａの両面に本体側案内部材２２１を備えた例を示す図である。このように案内部材２２が本体側案内部材２２１のみであっても、開封起点部２４から生じた裂け目が本体側案内部材２２１の上辺に案内されて開封停止部２５に達し、確実に引き裂きを停止させることができる。 FIG. 7F is a diagram illustrating an example in which the main body side guide member 221 is provided on both surfaces of the packaging bag 10A. Thus, even if the guide member 22 is only the main body side guide member 221, the tear generated from the opening start point 24 is guided to the upper side of the main body side guide member 221, reaches the opening stop portion 25, and reliably stops the tearing. Can be made.

なお、図７（Ｆ）は、包装袋１０の両面に本体側案内部材２２１を備えたが、これに限らず、包装袋１０の片面に本体側案内部材２２１を備えても良い。 In FIG. 7F, the main body side guide member 221 is provided on both surfaces of the packaging bag 10, but the present invention is not limited thereto, and the main body side guide member 221 may be provided on one surface of the packaging bag 10.

以上のように、本実施形態２によれば、開封時の引き裂きを開封停止部に誘導し、予定の位置で確実に止めることができる。 As described above, according to the second embodiment, tearing at the time of opening can be guided to the opening stop portion, and can be reliably stopped at a predetermined position.

〈実施形態３〉
図８は、本発明の実施形態３に係る包装袋の一例を示す図である。本実施形態３の包装袋１０Ｂは、前述の実施形態１と比べて開封停止部２５を複数備えた点が異なっている。なお、本実施形態３において、その他の構成は実施形態１と同じであるので、同一の要素に同符号を付すなどして再度の説明を省略する。 <Embodiment 3>
FIG. 8 is a diagram illustrating an example of a packaging bag according to Embodiment 3 of the present invention. The packaging bag 10B of the third embodiment is different from the first embodiment in that a plurality of opening stop portions 25 are provided. In addition, in this Embodiment 3, since another structure is the same as Embodiment 1, it abbreviate | omits description by attaching | subjecting the same code | symbol to the same element.

図８に示すように、本実施形態３の包装袋１０Ｂは、開封停止部２５を引き裂き予定方向に複数並設した。特に本実施形態３では、引き裂き予定方向において、上流側の開封停止部を第一開封停止部２５−１とし、第一開封停止部２５の切り込み端部Ａ１，Ａ２の下流側に第二開封停止部２５−２を設けた。 As shown in FIG. 8, in the packaging bag 10 B of the third embodiment, a plurality of opening stop portions 25 are arranged side by side in the planned tearing direction. In particular, in the third embodiment, in the planned tearing direction, the upstream unsealing stop portion is the first unsealing stop portion 25-1, and the second unsealing stop is downstream of the cut end portions A1 and A2 of the first unsealing stop portion 25. Portion 25-2 was provided.

このように第一開封停止部２５−１の下流側に第二開封停止部２５−２設けたことにより、第一開封停止部２５−１で引き裂きが停止せずに、切り込み２５Ａの端部Ａ１，Ａ２から引き裂かれた場合でも第二開封停止部２５−２で引き裂く力を更に分散して引き裂きを停止させる。 Thus, by providing the 2nd opening stop part 25-2 in the downstream of the 1st opening stop part 25-1, tearing does not stop at the 1st opening stop part 25-1, but edge part A1 of cut 25A. , Even when it is torn from A2, the tearing force is further dispersed by the second opening stop portion 25-2 to stop the tearing.

なお、図８では、第二開封停止部２５−２の切り込み２５Ａを第一開封停止部２５−１と同様に開封起点部２４側に向けて凸形状としたが、これに限らず、第二開封停止部２５−２の切り込み２５Ａは、他の形状としても良い。図９は、第二開封停止部２５−２の構成例を示す図である。 In FIG. 8, the cut 25A of the second opening stop portion 25-2 is convex toward the opening start point portion 24 in the same manner as the first opening stop portion 25-1, but this is not restrictive. The cut 25A of the opening stop portion 25-2 may have another shape. FIG. 9 is a diagram illustrating a configuration example of the second opening stopping unit 25-2.

図９（Ａ）の第二開封停止部２５−２は、引き裂き予定線２６と直交する直線状の切り込み２５Ａによって形成されている。なお、図９（Ａ）の例では、切り込み２５Ａを引き裂き予定線２６と直交する方向としたが、これに限らず、切り込み２５Ａが、引き裂き予定線２６と交わるように設けられれば良い。 The second unsealing stop portion 25-2 in FIG. 9A is formed by a linear cut 25A orthogonal to the planned tear line 26. In the example of FIG. 9A, the cut 25A is set in a direction orthogonal to the planned tear line 26. However, the present invention is not limited to this, and the cut 25A may be provided so as to intersect the planned tear line 26.

図９（Ｂ）の第二開封停止部２５−２は、開封起点部２４側に向けて凹形状とした切り込み２５Ａによって形成されている。 The second unsealing stop portion 25-2 in FIG. 9B is formed by a cut 25A having a concave shape toward the unsealing start point portion 24 side.

図９（Ｃ）の第二開封停止部２５−２は、円形に打ち抜かれた貫通穴２５Ｂによって形成されている。なお、図９（Ｃ）の例では、貫通穴２５Ｂを円形としたが、楕円形や小判型など、他の形状であっても良い。 The second unsealing stop portion 25-2 in FIG. 9C is formed by a through hole 25B punched out in a circular shape. In the example of FIG. 9C, the through hole 25B has a circular shape, but may have other shapes such as an oval shape or an oval shape.

以上のように本実施形態３によれば、開封停止部２５を引き裂き予定方向に複数並設したことにより、万一、第一開封停止部２５−１で引き裂きが停止せずに、切り込み２５Ａの端部Ａ１，Ａ２から引き裂かれた場合でも第二開封停止部２５−２で引き裂く力を更に分散して、確実に引き裂きを停止させることができる。 As described above, according to the third embodiment, by arranging a plurality of opening stop portions 25 in the planned tear direction, the first opening stop portion 25-1 does not stop the tearing, and the cut 25A Even when it is torn from the end portions A1 and A2, the tearing force can be further dispersed by the second unsealing stop portion 25-2 to reliably stop the tearing.

〈変形例〉
図１０〜図１４は、開封停止部２５の変形例の説明図である。図１０（Ａ）に示すように開封停止部２５の切り込み２５Ａを開封起点部２４に向けて凸の半円弧状とし、その中心点２５Cの上下に切り込み２５Ａの端部Ａ１，Ａ２を位置させると、当該端部Ａ１，Ａ
２の接線Ａ１１，Ａ２１が引き裂き予定方向と平行になる。 <Modification>
10-14 is explanatory drawing of the modification of the opening stop part 25. As shown in FIG. As shown in FIG. 10A, when the notch 25A of the opening stop portion 25 is formed in a convex semicircular arc shape toward the opening start point 24, and the end portions A1 and A2 of the notch 25A are positioned above and below the center point 25C. The end A1, A
Two tangents A11 and A21 are parallel to the planned tear direction.

この場合、図１０（Ｂ）のように開封時に本体側縁部１２Ａ及び引き裂き片側縁部１２Ｂを引く方向が切り込み端部Ａ１，Ａ２の方向と一致するので、ユーザの引く力が強過ぎると、切り込み端部Ａ１，Ａ２が開封起点のノッチと同じように働いて、切り込み端部Ａ１，Ａ２から更に裂け始める可能性がある。 In this case, as shown in FIG. 10 (B), the direction of pulling the main body side edge 12A and the tear piece side edge 12B coincides with the direction of the cut ends A1 and A2 at the time of opening. There is a possibility that the cut ends A1 and A2 work in the same manner as the notches at the opening start point, and that the cut ends A1 and A2 start to tear further.

そこで、図１１の例では、開封停止部２５の切り込み２５Ａを劣弧状とし、端部Ａ１，Ａ２の接線Ａ１１，Ａ２１が引き裂き予定方向に対して傾きをもつように構成した。例えば図１１に示す切り込み端部Ａ１，Ａ２の接線Ａ１１，Ａ２１が、引き裂き予定方向と成す角のうち鋭角の角度をθとした場合に、角度θが１０°以上、好ましくは３０°〜６０°となるように切り込み２５Ａが形成される。 Therefore, in the example of FIG. 11, the notch 25A of the unsealing stop portion 25 is formed in an inferior arc shape, and the tangent lines A11, A21 of the end portions A1, A2 are inclined with respect to the planned tearing direction. For example, when the tangent lines A11 and A21 of the cut end portions A1 and A2 shown in FIG. 11 have an acute angle θ among the angles formed with the planned tearing direction, the angle θ is 10 ° or more, preferably 30 ° to 60 °. A cut 25A is formed so as to be

このように図１１の開封停止部２５では、切り込み２５Ａの端部Ａ１，Ａ２の向きが引き裂き予定方向と異なっているので、開封時の本体側縁部１２Ａ及び引き裂き片側縁部１２Ｂを引く力が強過ぎた場合でも端部Ａ１，Ａ２が更なる引き裂きの起点とならず、確実に引き裂きが停止される。 In this way, in the opening stop portion 25 of FIG. 11, the direction of the end portions A1, A2 of the cut 25A is different from the planned tear direction, so that the force that pulls the main body side edge portion 12A and the tear piece side edge portion 12B at the time of opening. Even if it is too strong, the end portions A1 and A2 do not serve as starting points for further tearing, and the tearing is reliably stopped.

図１２の例では、図１０と比べて半円弧状の切り込み２５Ａの向きを変え、端部Ａ１，Ａ２の接線Ａ１１，Ａ２１が引き裂き予定方向に対して傾きをもつように構成した。図１２の切り込み２５Ａでは、端部Ａ１が中心点２５Ｃよりも左側（開封開始点側）、端部Ａ２が中心点２５Ｃよりも右側（引き裂き予定方向下流側）に設けられたことで、それぞれの接線Ａ１１，Ａ２１が引き裂き予定方向に対して角度θを有している。これにより図１２の開封停止部２５では、図１１の場合と同様に確実に引き裂きが停止される。また、図１２の開封停止部２５では、端部Ａ１，Ａ２が共に上向きに形成されているため、万一端部Ａ１，Ａ２から更に裂け始めた場合にも本体方向に裂け目が進まず、本体の破断が防止される。図１２に示すように、切り込み２５Ａの形状を円弧に限定せず、端部Ａ１，Ａ２の向きを任意に設定することで、前述のように確実に破断が防止されると共に、開封停止部２５の長さＬｘと高さ（端部Ａ１，Ａ２の離間距離）Ｌｙを自由に設定できる。 In the example of FIG. 12, the direction of the semicircular cut 25A is changed as compared with FIG. 10, and the tangent lines A11 and A21 of the end portions A1 and A2 are inclined with respect to the planned tearing direction. In the notch 25A of FIG. 12, the end A1 is provided on the left side (opening start point side) from the center point 25C, and the end A2 is provided on the right side (downstream side in the planned tearing direction) from the center point 25C. The tangent lines A11 and A21 have an angle θ with respect to the planned tear direction. Thereby, tearing is reliably stopped in the unsealing stop portion 25 of FIG. 12 as in the case of FIG. Further, in the unsealing stop portion 25 of FIG. 12, since the end portions A1 and A2 are both formed upward, the tear does not advance toward the main body even when further tearing starts from the one end portions A1 and A2. Is prevented from breaking. As shown in FIG. 12, the shape of the cut 25A is not limited to a circular arc, and by arbitrarily setting the directions of the end portions A1 and A2, breakage can be reliably prevented as described above, and the opening stop portion 25 can be prevented. The length Lx and the height (the separation distance between the end portions A1 and A2) Ly can be freely set.

なお、端部Ａ１，Ａ２の向きは、接線Ａ１１，Ａ２１が引き裂き予定方向に対して直交するように設けられても良い。 The directions of the end portions A1 and A2 may be provided so that the tangents A11 and A21 are orthogonal to the planned tear direction.

図１３の例では、切り込み２５Ａの中央部Ａ０付近を弧状とし、端部Ａ１，Ａ２の向きを接線Ａ１１，Ａ２１が引き裂き予定方向に対して傾くように設けたものである。 In the example of FIG. 13, the vicinity of the central portion A0 of the cut 25A is formed in an arc shape, and the end portions A1 and A2 are provided so that the tangents A11 and A21 are inclined with respect to the planned tearing direction.

上述の例では、切り込み２５Ａが曲線の例を示したが、これに限らず、切り込み２５Ａは、開封起点部２４に対して凸形状であれば、直線の組み合わせであっても良い。 In the above-described example, the cut 25A is an example of a curve. However, the present invention is not limited to this, and the cut 25A may be a combination of straight lines as long as it has a convex shape with respect to the opening start point 24.

図１４（Ａ）は、開封起点部側に向けて凸の山形、図１４（Ｂ）は、開封起点部側に向けて凸の台形の切り込み２５Ａにより開封停止部２５を形成したものである。図１４に示すように、直線を組み合わせた切り込み線２５Ａについても端部Ａ１，Ａ２の向きが引き裂き予定方向に対して角度θを有することが望ましい。 FIG. 14A shows a chevron that is convex toward the opening start point, and FIG. 14B shows an opening stop 25 that is formed by a convex trapezoidal cut 25A toward the opening start. As shown in FIG. 14, it is desirable that the direction of the end portions A1 and A2 also has an angle θ with respect to the planned tearing direction for the cut line 25A combining straight lines.

このように図１１〜図１４に示す変形例の開封停止部を備えた包装袋においても前述の実施形態１〜３と同様に開封時のシート材の引き裂きが停止される。なお、前記変形例の開封停止部２５は前述の実施形態１〜３の何れに適用しても良い。 Thus, also in the packaging bag provided with the opening stop part of the modification shown in FIGS. 11-14, tearing of the sheet | seat material at the time of opening is stopped similarly to above-mentioned Embodiment 1-3. In addition, you may apply the opening stop part 25 of the said modification to any of above-mentioned Embodiment 1-3.

１，２シート材
１０，１０Ａ，１０Ｂ包装袋
１２シール部
１７，２７保護層
１８，２８基材層
１９，２９シーラント層
２１開封誘導線
２２案内部材
２４開封起点部
２５開封停止部
２６開封予定線 1, 2 Sheet material 10, 10A, 10B Packaging bag 12 Sealing portion 17, 27 Protective layer 18, 28 Base material layer 19, 29 Sealant layer 21 Opening guide wire 22 Guide member 24 Opening starting point portion 25 Opening stop portion 26 Opening planned line

Claims

The sheet material is overlapped in the thickness direction to form an accommodating portion that accommodates an object to be accommodated between the overlapped sheets by adhering an edge, and a predetermined tearing position is predetermined for the bonded portion of the sheet material A packaging bag capable of opening the housing part by tearing with
An opening starting point portion which is a starting point when opening by tearing in the planned tearing direction along the planned tearing line as the planned tearing position;
It is arranged at a planned stop position that is predetermined as a position to stop the tearing of the sheet material started from the opening start point at the time of opening, and is located at the planned stop position at the end point of the planned tear line, and the opening start point An opening stop formed by a convex cut toward the
With
Both ends of the cut forming the opening stop portion on the downstream side in the planned tear direction extend in a direction away from the extension line of the planned tear line , and
The tangent line of the both end portions is parallel to the planned tear line, or has an inclination so that the tangent line of the both end portions is separated from the extended line of the planned tear line every time the tangent line proceeds in the planned tear direction. Packaging bag to do.

The packaging bag according to claim 1, wherein a plurality of the opening stop portions are arranged side by side in the planned tearing direction when tearing at the planned tearing position from the opening start point.

The sheet material is overlapped in the thickness direction to form an accommodating portion that accommodates an object to be accommodated between the overlapped sheets by adhering an edge, and a predetermined tearing position is predetermined for the bonded portion of the sheet material A packaging bag capable of opening the housing part by tearing with
An opening starting point portion which is a starting point when opening by tearing in the planned tearing direction along the planned tearing line as the planned tearing position;
It is arranged at a planned stop position that is predetermined as a position to stop the tearing of the sheet material started from the opening start point at the time of opening, and is located at the planned stop position at the end point of the planned tear line, and the opening start point A first opening stop formed by a convex cut toward the
A second opening stop portion provided at each of both ends of the cut forming the first opening stop portion, formed by a cut or through hole; and
A packaging bag comprising:

The packaging bag according to any one of claims 1 to 3 , wherein a weak line having a lower tear strength than other portions is provided in at least a part of the planned tearing position.