JP5973644B2

JP5973644B2 - Packaging bag

Info

Publication number: JP5973644B2
Application number: JP2015227388A
Authority: JP
Inventors: 敬明原
Original assignee: 三洋グラビア株式会社
Priority date: 2015-11-20
Filing date: 2015-11-20
Publication date: 2016-08-23
Anticipated expiration: 2035-01-27
Also published as: JP2016137939A

Description

本発明は包装用袋に係り、特に、背貼り部を備えた袋の開封構造に関する。 The present invention relates to a packaging bag, and more particularly, to a bag opening structure having a back pasting portion.

一般に、縦方向に伸びる背貼り部と、縦方向の両端に形成される横シール部とを備え、背貼り部を開封する構造を備えた包装用袋が知られている。例えば、以下の特許文献１に記載されたピロー包装体においては、背シール部１の内縁側に非シール部４を設け、その外縁側にシール部５を形成するとともに、横シール部２上にある背シール部１の端縁にノッチ７を形成することにより、ノッチ７から背シール部１を縦に引き裂くようにして開封する構造を備えている。 In general, a packaging bag is known that includes a back pasting portion extending in the vertical direction and horizontal seal portions formed at both ends in the vertical direction, and has a structure for opening the back pasting portion. For example, in the pillow package described in Patent Document 1 below, the non-seal part 4 is provided on the inner edge side of the back seal part 1, the seal part 5 is formed on the outer edge side, and the lateral seal part 2 is formed on the side seal part 2. By forming a notch 7 at the end edge of a certain back seal portion 1, a structure is provided in which the back seal portion 1 is opened by tearing vertically from the notch 7.

また、以下の特許文献２に記載された包装用袋においては、センターシール部としての開口端形成部４の内部にジッパーなどの開閉手段６を取り付けるとともに、この開閉手段６よりも外縁側に封止部９を形成し、開口端形成部４の端縁にノッチ４ａを形成することにより、ノッチ４ａから開口端形成部４を引き裂くことにより開封すると、開閉手段６により開閉可能な開口部が形成されるように構成されている。 Further, in the packaging bag described in Patent Document 2 below, an opening / closing means 6 such as a zipper is attached to the inside of the open end forming portion 4 as a center seal portion, and the outer edge side of the opening / closing means 6 is sealed. By forming the stopper 9 and forming the notch 4a at the edge of the opening end forming portion 4, opening the opening end forming portion 4 from the notch 4a forms an opening that can be opened and closed by the opening / closing means 6. It is configured to be.

実開昭６３−１２３４７９号明細書Japanese Utility Model Publication No. 63-123479 特開平１１−１２４１５０号公報JP-A-11-124150

しかしながら、上記従来の包装外縁側のシール部と内縁側の非シール部を備える背貼り部を備えた包装用袋においては、外縁側のシール部と内縁側の非シール部を備える背貼り部の端縁にノッチなどの開封開始構造を形成しているが、この開封開始構造から背貼り部に沿ってフィルムを引き裂こうとすると、非シール部の引き裂き方向が定まらず、開口縁が波状に形成されて見栄えが悪化したり、袋の内容物を収容している収容部分が引き裂かれて内容物がこぼれてしまったりするという問題点がある。 However, in the packaging bag provided with the above-described conventional packaging outer edge side seal part and inner edge side non-seal part, the back-pasting part provided with the outer edge side seal part and the inner edge side non-seal part. An opening opening structure such as a notch is formed on the edge, but if you try to tear the film along the back-attached part from this opening opening structure, the tear direction of the non-sealed part will not be determined, and the opening edge will be wavy There is a problem that the appearance is deteriorated because of being formed, or the contents of the bag are torn and the contents are spilled.

そこで、本発明は上記問題点を解決するものであり、その課題は、外縁側のシール部と内縁側の非シール部を備える背貼り部を有し、背貼り部の端縁に開封開始構造を備えた包装用袋において、開封開始構造から背貼り部に沿って開封する際に、見栄えよく容易に開封でき、引き裂き線が収容部分に向かうことのないように引き裂き方向を安定させることにある。 Therefore, the present invention solves the above-mentioned problems, the problem is that it has a back pasting portion having a seal portion on the outer edge side and a non-seal portion on the inner edge side, and an opening start structure at the edge of the back pasting portion When opening from the opening start structure along the back-pasted portion, the packaging bag can be easily opened with a good appearance, and the tearing direction is stabilized so that the tear line does not go to the housing part. .

斯かる実情に鑑み、本発明の包装用袋は、袋（１）を構成するフィルム（２）の横方向に対向する一対の側縁（２ｂ１，２ｂ２）同士が合掌状に貼着され、縦方向に沿って伸びるように形成された背貼り部（３）と、前記縦方向の両端において前記横方向に沿って形成された一対の横シール部（４，５）とを備え、前記背貼り部（３）は、外縁側のシール部（３１）と、内縁側の非シール部（３２）と、前記シール部（３１）及び前記非シール部（３２）の前記縦方向の両側の端縁部分に設けられる端縁シール部（３３，３４）と、を備え、前記端縁シール部（３３，３４）は、前記背貼り部（３）の前記横シール部（４，５）上に配置され、前記横シール部（４，５）及び前記シール部（３１）と連続することにより前記非シール部（３２）を封止し、前記端縁シール部（３３、３４）の少なくとも一方に開封開始構造（３３ａ〜３３ｆ，３４ａ）を備えた包装用袋において、前記開封開始構造（３３ａ〜３３ｆ）は、前記端縁シール部（３３）において前記非シール部に向けて伸びるノッチ（３３ａ，３３ｄ，３４ａ）若しくは切り込み（３３ｂ，３３ｃ，３３ｅ，３３ｆ）であり、前記開封開始構造の内端（Ｐ）は前記非シール部（３２）の前記縦方向の側に存在する前記端縁シール部（３３）の内側領域（３３−２）に設けられ、前記開封開始構造の前記内端（Ｐ）の前記非シール部（３２）との間の前記縦方向に沿った距離（Ｌａ）は、前記開封開始構造の前記内端（Ｐ）の前記シール部（３１）と前記非シール部（３２）の境界線（３０ｃ）の前記縦方向への延長線との間の内外方向に沿った距離（Ｌｂ）より大きいことを特徴とする。 In view of such circumstances, the packaging bag of the present invention has a pair of side edges (2b1, 2b2) facing each other in the lateral direction of the film (2) constituting the bag (1), and is attached vertically. A back sticking portion (3) formed so as to extend along a direction, and a pair of horizontal seal portions (4, 5) formed along the horizontal direction at both ends in the vertical direction, The part (3) includes an outer edge side seal part (31), an inner edge side non-seal part (32), and edges on both sides in the longitudinal direction of the seal part (31) and the non-seal part (32). Edge seal portions (33, 34) provided on the portion, and the edge seal portions (33, 34) are disposed on the lateral seal portions (4, 5) of the back pasting portion (3). And the non-seal part (32) by being continuous with the horizontal seal part (4, 5) and the seal part (31). In the packaging bag provided with the opening start structure (33a to 33f, 34a) in at least one of the edge seal portions (33, 34), the opening start structure (33a to 33f) The edge seal portion (33) is a notch (33a, 33d, 34a) or a notch (33b, 33c, 33e, 33f) extending toward the non-seal portion, and the inner end (P) of the opening start structure is the non- The non-sealed portion of the inner end (P) of the opening start structure provided in an inner region (33-2) of the edge seal portion (33) present on the longitudinal side of the seal portion (32) The distance (La) along the vertical direction between (32) is the boundary line (30c) between the seal part (31) and the non-seal part (32) of the inner end (P) of the opening start structure. ) In the vertical direction and It is greater than the distance (Lb) along the inner and outer direction between.

本発明において、前記距離（Ｌａ）は前記距離（Ｌｂ）の２倍以上であることが好ましい。 In the present invention, the distance (La) is preferably at least twice as long as the distance (Lb).

この場合において、前記距離（Ｌａ）は前記距離（Ｌｂ）の３倍以上であることが望ましい。特に、３倍〜７倍の範囲内であることが好適である。これは、Ｌａ／Ｌｂの比が大きくなり、Ｌｂが小さくなり過ぎると、製袋時における開封開始構造の位置ずれ等により、端縁シール部の開封開始構造から伸びる引き裂き線が非シール部内に進入せず、シール部内を進行してしまう危険性が増大するからである。 In this case, the distance (La) is preferably at least three times the distance (Lb). In particular, it is preferably within a range of 3 to 7 times. This is because when the ratio of La / Lb becomes large and Lb becomes too small, a tear line extending from the opening start structure of the edge seal part enters the non-seal part due to a positional deviation of the opening start structure at the time of bag making. This is because the risk of proceeding in the seal portion without increasing increases.

本発明において、前記開封開始構造は前記ノッチ（３３ａ，３３ｄ，３４ａ）であり、前記ノッチの外側縁（３３ａ１，３３ｄ１）は、前記端縁シール部（３３）の前記縦方向の縁部において、前記シール部（３１）の前記縦方向の側に存在する前記端縁シール部（３３）の外側領域（３３−１）に設けられるとともに、前記縁部から前記内端（Ｐ）に向かう少なくとも一部分において前記非シール部（３２）の前記縦方向の側に存在する前記端縁シール部（３３）の内側領域（３３−２）に達するように前記縦方向に対して傾斜した方向に延在し、前記内端（Ｐ）以外において前記外側縁（３３ａ１，３３ｄ１）に対して内縁側に離間した内側縁（３３ａ２，３３ｄ２）を有することが好ましい。 In the present invention, the opening start structure is the notch (33a, 33d, 34a), and the outer edge (33a1, 33d1) of the notch is at the longitudinal edge of the edge seal portion (33), The seal portion (31) is provided in an outer region (33-1) of the edge seal portion (33) existing on the longitudinal side, and at least a part from the edge portion toward the inner end (P). And extending in a direction inclined with respect to the longitudinal direction so as to reach an inner region (33-2) of the edge seal portion (33) existing on the longitudinal side of the non-seal portion (32). In addition to the inner end (P), it is preferable to have inner edges (33a2, 33d2) that are separated from the outer edges (33a1, 33d1) on the inner edge side.

この場合において、前記内側縁（３３ａ２，３３ｄ２）は、前記外側縁（３３ａ１，３３ｄ１）に対して縦方向の軸線を中心に対称な形状である場合があり、或いは、前記内端（Ｐ）に向けて縦方向に直線状に伸びる場合もある。 In this case, the inner edges (33a2, 33d2) may have a symmetric shape about the longitudinal axis with respect to the outer edges (33a1, 33d1), or at the inner end (P). In some cases, it may extend straight in the vertical direction.

本発明において、前記開封開始構造は前記切り込み（３３ｂ，３３ｃ，３３ｅ，３３ｆ）であり、前記切り込みは、前記端縁シール部（３３）の前記縦方向の縁部において、前記シール部（３１）の前記縦方向の側に存在する前記端縁シール部の外側領域（３３−１）に設けられるとともに、前記縁部から前記内端（Ｐ）に向かう少なくとも一部分において前記非シール部（３２）の前記縦方向の側に存在する前記端縁シール部（３３）の内側領域（３３−２）に達するように前記縦方向に対して傾斜した方向に延在することが好ましい。 In the present invention, the opening opening structure is the notches (33b, 33c, 33e, 33f), and the notches are formed at the seal portion (31) at the longitudinal edge portion of the edge seal portion (33). Of the non-seal portion (32) at least in a part from the edge portion toward the inner end (P). It is preferable to extend in a direction inclined with respect to the longitudinal direction so as to reach an inner region (33-2) of the edge seal portion (33) present on the longitudinal side.

上記各発明において、前記縦方向に対して傾斜した方向に延在する前記外側縁（３３ａ１，３３ｄ１）若しくは前記切り込み（３３ｆ）の先端に、前記縦方向に伸びる切り込み（３３ｅ）が接続され、該縦方向に伸びる切り込み（３３ｅ）の先端が前記内端（Ｐ）となっていることが好ましい。 In each of the above inventions, a cut (33e) extending in the vertical direction is connected to a tip of the outer edge (33a1, 33d1) or the cut (33f) extending in a direction inclined with respect to the vertical direction, It is preferable that the front end of the cut (33e) extending in the vertical direction is the inner end (P).

本発明において、前記シール部（３１）は、前記背貼り部（３）において、前記フィルム（２）の前記一対の側縁（２ｂ１，２ｂ２）の間に、前記シール部（３１）の内縁に端縁若しくは切り裂き線を備えたテープ部分（６，７ａ′）が介在した、少なくとも三層からなる構造を有することが好ましい。 In the present invention, the seal portion (31) is formed on the inner edge of the seal portion (31) between the pair of side edges (2b1, 2b2) of the film (2) in the back pasting portion (3). It is preferable to have a structure consisting of at least three layers in which a tape portion (6, 7a ') having an edge or a tear line is interposed.

上記発明において、前記テープ部分は、前記フィルム（２）とは別の帯状のテープ（６）であることが好ましい。この場合にはさらに、前記帯状のテープ（６）は、前記縦方向よりも前記内外方向に破断しにくい素材で構成されることが望ましい。 In the said invention, it is preferable that the said tape part is a strip | belt-shaped tape (6) different from the said film (2). In this case, it is further preferable that the belt-like tape (6) is made of a material that is less likely to break in the inner and outer directions than in the longitudinal direction.

本発明において、前記非シール部（３２）には、前記フィルム（２）の前記一対の側縁（２ｂ１，２ｂ２）の内面上にそれぞれ貼着され、相互に係脱可能に構成された一対の開閉部材（７ａ，７ｂ）を有する開閉手段（７）が設けられることが好ましい。この場合において、前記開閉手段（７）は、前記シール部（３１）と前記非シール部（３２）の境界線（３０ｃ）に対して内縁側に離間して配置されることが望ましい。また、前記シール部（３１）は、前記背貼り部（３）において前記フィルム（２）の前記一対の側縁（２ｂ１，２ｂ２）の間にテープ部分が介在した、少なくとも三層からなる構造を有し、前記一対の開閉部材のうちの少なくとも一方（７ａ）は前記テープ部分と一体に構成されるとともに、前記シール部（３１）と前記非シール部（３２）の境界位置に前記縦方向に沿った切り裂き線を備えることが望ましい。 In the present invention, a pair of non-seal portions (32) are configured to be attached to and disengaged from each other by being attached to the inner surfaces of the pair of side edges (2b1, 2b2) of the film (2). It is preferable that an opening / closing means (7) having an opening / closing member (7a, 7b) is provided. In this case, it is desirable that the opening / closing means (7) is arranged to be separated from the boundary line (30c) between the seal part (31) and the non-seal part (32) on the inner edge side. The seal portion (31) has a structure consisting of at least three layers in which a tape portion is interposed between the pair of side edges (2b1, 2b2) of the film (2) in the back pasting portion (3). And at least one of the pair of opening and closing members (7a) is configured integrally with the tape portion, and in the longitudinal direction at a boundary position between the sealing portion (31) and the non-sealing portion (32). It is desirable to have a tear line along.

本発明によれば、外縁側のシール部と内縁側の非シール部を備える背貼り部を有し、背貼り部の端縁に開封開始構造を備えた包装用袋において、開封開始構造から背貼り部に沿って開封する際に、見栄えよく容易に開封でき、引き裂き線が収容部分に向かうことのないように引き裂き方向を安定させることができるという優れた効果を奏し得る。 According to the present invention, in a packaging bag having a back pasting portion having a seal portion on the outer edge side and a non-seal portion on the inner edge side, and having an opening start structure on the edge of the back pasting portion, When opening along a sticking part, it can open easily with good appearance, and there can be an excellent effect that the tearing direction can be stabilized so that the tear line does not go to the accommodating part.

本発明に係る第１実施形態の包装用袋を示す背面斜視図である。It is a back perspective view showing the packaging bag of a 1st embodiment concerning the present invention. 第１実施形態の包装用袋の背貼り部の端縁シール部を示す拡大部分側面図（ａ）、Ｂ−Ｂ線に沿って切断した端面構造を示す端面図（ｂ）及びＣ−Ｃ線に沿って切断した端面構造を示す端面図（ｃ）である。The expanded partial side view (a) which shows the edge seal part of the back sticking part of the packaging bag of 1st Embodiment, the end view (b) which shows the end surface structure cut | disconnected along the BB line, and CC line It is an end elevation (c) which shows the end face structure cut along. 第２構成例の包装用袋の背貼り部の端縁シール部を示す拡大部分側面図（ａ）、Ｂ−Ｂ線に沿って切断した端面構造を示す端面図（ｂ）及びＣ−Ｃ線に沿って切断した端面構造を示す端面図（ｃ）である。The expanded partial side view (a) which shows the edge seal part of the back sticking part of the packaging bag of a 2nd structural example, the end view (b) which shows the end surface structure cut | disconnected along the BB line, and CC line It is an end elevation (c) which shows the end face structure cut along. 第３実施形態の包装用袋の背貼り部の端縁シール部を示す拡大部分側面図（ａ）、Ｂ−Ｂ線に沿って切断した端面構造を示す端面図（ｂ）及びＣ−Ｃ線に沿って切断した端面構造を示す端面図（ｃ）である。The expanded partial side view (a) which shows the edge seal part of the back sticking part of the packaging bag of 3rd Embodiment, the end view (b) which shows the end surface structure cut | disconnected along the BB line, and CC line It is an end elevation (c) which shows the end face structure cut along. 第４構成例の包装用袋の背貼り部の端縁シール部を示す拡大部分側面図（ａ）、Ｂ−Ｂ線に沿って切断した端面構造を示す端面図（ｂ）及びＣ−Ｃ線に沿って切断した端面構造を示す端面図（ｃ）である。The expanded partial side view (a) which shows the edge seal part of the back sticking part of the packaging bag of the 4th structural example, the end view (b) which shows the end surface structure cut | disconnected along BB line, and CC line It is an end elevation (c) which shows the end face structure cut along. 第５実施形態の包装用袋の背貼り部の端縁シール部を示す拡大部分側面図（ａ）、Ｂ−Ｂ線に沿って切断した端面構造を示す端面図（ｂ）及びＣ−Ｃ線に沿って切断した端面構造を示す端面図（ｃ）である。The expanded partial side view (a) which shows the edge seal part of the back sticking part of the packaging bag of 5th Embodiment, the end view (b) which shows the end surface structure cut | disconnected along BB line, and CC line It is an end elevation (c) which shows the end face structure cut along. 第６構成例の包装用袋の背貼り部の端縁シール部を示す拡大部分側面図（ａ）、Ｂ−Ｂ線に沿って切断した端面構造を示す端面図（ｂ）及びＣ−Ｃ線に沿って切断した端面構造を示す端面図（ｃ）である。The expanded partial side view (a) which shows the edge seal part of the back sticking part of the packaging bag of a 6th structural example, the end view (b) which shows the end surface structure cut | disconnected along the BB line, and CC line It is an end elevation (c) which shows the end face structure cut along. 第７実施形態の包装用袋の背貼り部の端縁シール部を示す拡大部分側面図（ａ）、Ｂ−Ｂ線に沿って切断した端面構造を示す端面図（ｂ）及びＣ−Ｃ線に沿って切断した端面構造を示す端面図（ｃ）である。The expanded partial side view (a) which shows the edge seal part of the back sticking part of the packaging bag of 7th Embodiment, the end view (b) which shows the end surface structure cut | disconnected along BB line, and CC line It is an end elevation (c) which shows the end face structure cut along. 第８実施形態の包装用袋の背貼り部の端縁シール部を示す拡大部分側面図（ａ）、Ｂ−Ｂ線に沿って切断した端面構造を示す端面図（ｂ）及びＣ−Ｃ線に沿って切断した端面構造を示す端面図（ｃ）である。The expanded partial side view (a) which shows the edge seal part of the back sticking part of the packaging bag of 8th Embodiment, the end view (b) which shows the end surface structure cut | disconnected along the BB line, and CC line It is an end elevation (c) which shows the end face structure cut along. 本発明に係る第１実施形態の包装用袋の開封時の様子を示す部分斜視図である。It is a fragmentary perspective view which shows the mode at the time of opening of the packaging bag of 1st Embodiment which concerns on this invention. 従来の包装用袋の開封時の様子を示す部分斜視図である。It is a fragmentary perspective view which shows the mode at the time of opening of the conventional packaging bag.

次に、添付図面を参照して本発明の実施形態について詳細に説明する。図１は、本発明に係る包装用袋１の全体構成を示す背面斜視図である。この包装用袋１を構成するフィルム２は特に限定されないが、一般的には、包装用途に応じて選定される基材層の内面上にシール性の良好なシーラント層をラミネートした片面シール性を有する合成樹脂フィルムを用いる。包装用袋１では、上記フィルム２の横方向（図示左右方向）の相互に対向する一対の側縁２ｂ１と２ｂ２を合掌状に内面同士が向かい合う状態でヒートシールなどにより貼り合わせた背貼り部３が図示中央に形成される。背貼り部３の外縁側には、縦方向（図示上下方向）に沿って伸びるシール部３１が形成されている。シール部３１の外縁は背貼り部３の外縁３０ａとなっている。また、背貼り部３の内縁側には、縦方向に沿って伸びる非シール部３２が形成されている。非シール部３２の基部（内容物を収容する本体部分との境界位置）は背貼り部３の内縁３０ｂとなっている。 Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a rear perspective view showing the overall configuration of a packaging bag 1 according to the present invention. The film 2 constituting the packaging bag 1 is not particularly limited, but generally has a single-sided sealing property in which a sealant layer having a good sealing property is laminated on the inner surface of a base material layer selected according to the packaging application. A synthetic resin film is used. In the packaging bag 1, a back pasting portion 3 in which a pair of side edges 2 b 1 and 2 b 2 facing each other in the lateral direction (left-right direction in the figure) of the film 2 are pasted together by heat sealing or the like with the inner surfaces facing each other like a palm. Is formed in the center of the figure. On the outer edge side of the back pasting portion 3, a seal portion 31 extending along the vertical direction (the vertical direction in the figure) is formed. The outer edge of the seal portion 31 is the outer edge 30 a of the back pasting portion 3. A non-seal portion 32 extending along the vertical direction is formed on the inner edge side of the back pasting portion 3. The base part of the non-seal part 32 (boundary position with the main body part that stores the contents) is the inner edge 30 b of the back pasting part 3.

包装用袋１の縦方向の両端部はヒートシールなどによりシールされた横シール部４，５とされる。これらの横シール部４，５は、例えば、一方が予め封鎖され、その後、袋の内部に図示しない内容物を収容した後に他方が封鎖される。また、背貼り部３の上記横シール部４．５上に配置される端縁部には端縁シール部３３，３４が形成されている。この端縁シール部３３，３４は、図２に示すように、上記シール部３１の縦方向（図２の左右方向）の両側にそれぞれ隣接する外側領域３３−１，３４−１（３４−１は図示せず）と、上記非シール部３２の縦方向の両側にそれぞれ隣接する内側領域３３−２，３４−２（３４−２は図示せず）とが一体に構成される。そして、端縁シール部３３，３４は、上記横シール部４，５と上記シール部３１のいずれにも連続することにより、上記非シール部３２を袋の外部に対して封止している。 Both end portions in the longitudinal direction of the packaging bag 1 are horizontal seal portions 4 and 5 sealed by heat sealing or the like. For example, one of these horizontal seal portions 4 and 5 is sealed in advance, and then the other is sealed after the contents (not shown) are accommodated inside the bag. Further, edge seal portions 33 and 34 are formed on the edge portions of the back pasting portion 3 disposed on the lateral seal portion 4.5. As shown in FIG. 2, the edge seal portions 33 and 34 are outside regions 33-1 and 34-1 (34-1) adjacent to both sides of the seal portion 31 in the longitudinal direction (left and right direction in FIG. 2), respectively. Are not shown) and inner regions 33-2 and 34-2 (34-2 are not shown) adjacent to both sides of the non-seal portion 32 in the longitudinal direction are integrally configured. The edge seal portions 33 and 34 are continuous with both the lateral seal portions 4 and 5 and the seal portion 31 to seal the non-seal portion 32 against the outside of the bag.

背貼り部３において、上記シール部３１と上記非シール部３２の境界線３０ｃは縦方向に沿って直線状に伸びるように形成される。また、上記端縁シール部３３，３４の縁部には開封開始構造が設けられている。この開封開始構造は図１ではＶ字型の先端形状を有するノッチ（切り欠き）３３ａ，３４ａである。なお、図示例では端縁シール部３３，３４の双方に開封開始構造を設けているが、端縁シール部３３，３４のうち、縦方向の少なくとも一方の端縁シール部に開封開始構造を設ければよい。また、端縁シール部３３に設ける開封開始構造と、端縁シール部３４に設ける開封開始構造とは、相互に異なる構造であってもよいが、基本的に相互に同様の構成を採り得るので、以下においては、端縁シール部３３についてのみ説明し、端縁シール部３４の開封開始構造の説明は省略する。図２には、ノッチ３３ａを備えた背貼り部３の端部近傍の拡大部分側面図が示される。ただし、本発明の開封開始構造としては、図２及び図４に示す第１実施形態、第３実施形態、第７実施形態のノッチ３３ａ、３３ｄの他に、図３、図５、図７及び図９に示す第２実施形態、第４実施形態、第６実施形態の直線状の切り込み３３ｂ、図６及び図８に示す第５実施形態、第８実施形態の屈折状の切り込み３３ｃ、３３ｅ、３３ｆなどであってもよい。さらに、上記ノッチ（切り欠き）や切り込み（スリット）に限らず、ミシン目、ハーフカット線、微小な穿孔の列などからなる各種の切り裂き線であってもよく、これらの切り裂き線が延在する方向と、それらの内端Ｐの位置を観念することができるものであって、結果として縦方向に向けた易開封作用を有するものであれば、上記開封開始構造として用いることができる。 In the back pasting portion 3, a boundary line 30c between the sealing portion 31 and the non-sealing portion 32 is formed to extend linearly along the vertical direction. In addition, an opening start structure is provided at the edge portions of the edge seal portions 33 and 34. This opening start structure is notches (notches) 33a and 34a having a V-shaped tip shape in FIG. In the illustrated example, both the edge seal portions 33 and 34 are provided with an opening start structure. However, among the edge seal portions 33 and 34, at least one edge seal portion in the vertical direction is provided with an opening start structure. Just do it. Also, the opening start structure provided in the edge seal portion 33 and the opening start structure provided in the edge seal portion 34 may be different from each other, but can basically adopt the same configuration as each other. In the following, only the edge seal portion 33 will be described, and description of the opening start structure of the edge seal portion 34 will be omitted. FIG. 2 shows an enlarged partial side view of the vicinity of the end portion of the back pasting portion 3 provided with the notches 33a. However, as an opening start structure of the present invention, in addition to the notches 33a and 33d of the first embodiment, the third embodiment, and the seventh embodiment shown in FIGS. 2 and 4, FIGS. The linear cuts 33b of the second embodiment, the fourth embodiment, and the sixth embodiment shown in FIG. 9, the refractive cuts 33c, 33e of the fifth embodiment and the eighth embodiment shown in FIGS. 33f may be used. Further, the present invention is not limited to the above notches and notches (slits), and may be various types of tear lines including perforations, half-cut lines, rows of minute holes, and the like. As long as the direction and the position of the inner end P can be considered and, as a result, it has an easy opening action in the vertical direction, it can be used as the opening start structure.

次に、図２を参照して、本発明に係る第１実施形態の包装用袋１の詳細な構造について説明する。本実施形態においては、一方の端縁シール部３３の端縁部から切り欠き状に構成されたノッチ３３ａが形成されている。このノッチ３３ａは、Ｖ字状の先端形状を有し、その先端の頂点が内端Ｐとなっている。この内端Ｐは、シール部３１の縦方向の側（図示右側）にある外側領域３３−１ではなく、非シール部３２の縦方向の側（図示右側）にある内側領域３３−２に配置されている。内端Ｐのより具体的な位置は、非シール部３２と端縁シール部３３の境界線から距離Ｌａだけ離れるとともに、シール部３１と非シール部３２の境界線３０ｃの延長線から距離Ｌｂだけ内側領域３３−２に入り込んだ位置である。 Next, the detailed structure of the packaging bag 1 according to the first embodiment of the present invention will be described with reference to FIG. In the present embodiment, a notch 33 a configured in a notch shape from the end edge portion of one end edge seal portion 33 is formed. The notch 33a has a V-shaped tip shape, and the apex of the tip is an inner end P. This inner end P is arranged not in the outer region 33-1 on the vertical side (right side in the figure) of the seal portion 31 but in the inner region 33-2 on the vertical side (right side in the drawing) of the non-seal portion 32. Has been. More specifically, the inner end P is separated from the boundary line between the non-seal part 32 and the edge seal part 33 by a distance La, and from the extension line of the boundary line 30c between the seal part 31 and the non-seal part 32 by a distance Lb. This is the position that has entered the inner region 33-2.

本発明においては、開封開始構造のノッチ３３ａの内端Ｐの位置は、上記距離Ｌａが上記距離Ｌｂよりも大きい範囲に設定される。特に、上記距離Ｌａが上記距離Ｌｂの２倍以上であることが好ましく、３倍以上であることが望ましい。図示例では、シール部３１の内外方向（図示上下方向）の幅、非シール部３２の内外方向の幅、及び、端縁シール部３３，３４の縦方向（図示左右方向）の幅（以下、単にシール幅という。）はいずれも１０ｍｍとなっており、内端Ｐの位置を示す上記距離Ｌａは６ｍｍ、上記距離Ｌｂは１ｍｍであり、Ｌａ／Ｌｂ＝６である。また、端縁シール部３３の端縁におけるノッチ３３ａの内外方向（図２の上下方向）の開口幅は３〜４ｍｍであり、ノッチ３３ａの形状は内外方向に対称な形状となっている。したがって、ノッチ３３ａの外側縁３３ａ１と内側縁３３ａ２とは内外方向に対称な線形状を有している。また、外側縁３３ａ１と内側縁３３ａ２は内端Ｐで合流している。外側縁３３ａ１は、上記開口幅を有する開口縁の部分から縦方向にまっすぐに（すなわち上記境界線３０ｃと平行に）伸びた後に、シール部３１に接近するに従って内側へ向かうように直線状に傾斜して伸び、上記外側領域３３−１内から上記内側領域３３−２内へ移動した後に上記内端Ｐに達している。また、内側縁３３ａ２は、上記開口幅を有する開口縁の部分から縦方向にまっすぐに（すなわち上記境界線３０ｃと平行に）伸びた後に、非シール部３２に接近するに従って外側へ向かうように上記内側領域３３−２内を直線状に傾斜して伸び、上記内端Ｐに達している。 In the present invention, the position of the inner end P of the notch 33a of the opening start structure is set in a range where the distance La is larger than the distance Lb. In particular, the distance La is preferably at least twice the distance Lb, and more preferably at least three times. In the illustrated example, the width of the seal portion 31 in the inner and outer direction (up and down direction in the drawing), the width of the non-seal portion 32 in the inner and outer direction, and the width of the edge seal portions 33 and 34 in the vertical direction (left and right direction in the drawing) (hereinafter, The seal width is simply 10 mm, the distance La indicating the position of the inner end P is 6 mm, the distance Lb is 1 mm, and La / Lb = 6. In addition, the opening width of the notch 33a at the edge of the edge seal portion 33 in the inner and outer directions (vertical direction in FIG. 2) is 3 to 4 mm, and the shape of the notch 33a is symmetrical to the inner and outer directions. Therefore, the outer edge 33a1 and the inner edge 33a2 of the notch 33a have line shapes that are symmetrical in the inner and outer directions. The outer edge 33a1 and the inner edge 33a2 merge at the inner end P. The outer edge 33a1 extends straight from the opening edge portion having the opening width in the vertical direction (that is, parallel to the boundary line 30c), and then inclines linearly toward the inner side as the seal portion 31 is approached. The inner end P is reached after moving from the outer region 33-1 into the inner region 33-2. Further, the inner edge 33a2 extends straight from the portion of the opening edge having the opening width in the vertical direction (that is, parallel to the boundary line 30c), and then goes outward as it approaches the non-seal portion 32. The inner region 33-2 extends in a linearly inclined manner and reaches the inner end P.

本実施形態の場合、フィルム２は特に限定されない。これは、上記端縁シール部３３に開封開始構造として上記ノッチ３３ａが形成されているため、手切れ性を有しないフィルムであっても、容易に開封を開始することができるからである。ただし、開封をさらに容易化するためには、上記縦方向に引き裂きやすい特性を有するカット方向性のあるものが好ましく、例えば、上記縦方向に延伸した一軸延伸フィルム（一軸延伸ポリプロピレン（ＯＰＰ）、一軸延伸ポリエチレン（ＨＤＰＥ））などが挙げられる。ピロー包装機などの製袋装置に使用するフィルム２の原反としては、当該原反の縦方向に沿ってカット性を有するものを用いることが望ましい。 In the case of this embodiment, the film 2 is not particularly limited. This is because, since the notch 33a is formed as an opening start structure in the edge seal portion 33, the opening can be easily started even with a film having no hand cutting property. However, in order to further facilitate the opening, a film having a cut direction having the property of being easily torn in the longitudinal direction is preferable. For example, a uniaxially stretched film (uniaxially stretched polypropylene (OPP), uniaxially stretched in the longitudinal direction) is preferable. Stretched polyethylene (HDPE)) and the like. As an original fabric of the film 2 used for a bag making apparatus such as a pillow wrapping machine, it is desirable to use a material having a cut property along the longitudinal direction of the original fabric.

本実施形態では、端縁シール部３３においてノッチ３３ａが縦方向に伸びるように形成されるとともに、その内端Ｐの位置を示す上記距離Ｌａが上記距離Ｌｂよりも大きいため、端縁シール部３３をノッチ３３ａから引き裂いた場合、引き裂き線は内端Ｐから非シール部３２に向けて伸びていき、境界線３０ｃに近い位置まで到達してから非シール部３２内に進入する。このとき、引き裂き線が進入した位置では、非シール部３２内であるために一対のフィルム２同士が接着されていないものの、シール部３１との境界線３０ｃに近いため、一対のフィルム２は相互に拘束された状態になっていることから、引き裂き方向がずれにくく、したがって非シール部３２内において引き裂き線が境界線３０ｃに沿って伸びていく。このため、引き裂き線の方向は境界線３０ｃによって案内されるため、開封後の開口縁は従来よりも直線状に形成されて美麗な端縁が得られるとともに、引き裂き線が内容物を収容している収容部の側に向かうおそれもない。 In the present embodiment, the notch 33a is formed in the edge seal portion 33 so as to extend in the vertical direction, and the distance La indicating the position of the inner end P is larger than the distance Lb. Is torn from the notch 33a, the tear line extends from the inner end P toward the non-seal portion 32, and enters the non-seal portion 32 after reaching a position close to the boundary line 30c. At this time, since the pair of films 2 are not bonded to each other at the position where the tear line has entered, since they are in the non-seal portion 32, the pair of films 2 are close to each other because they are close to the boundary line 30c with the seal portion 31. Therefore, the tearing direction is difficult to shift, so that the tear line extends along the boundary line 30c in the non-seal portion 32. For this reason, since the direction of the tear line is guided by the boundary line 30c, the opening edge after opening is formed in a more straight line than before, and a beautiful edge is obtained, and the tear line accommodates the contents. There is no risk of heading toward the containing section.

ここで、上記のように内端Ｐが内側領域３３−２内に配置される理由は以下のとおりである。すなわち、内端Ｐが外側領域３３−１内に配置されると、端縁シール部３３の外側領域３３−１は外側（図示上側）へ引き上げられるように引っ張られるので、内端Ｐから切り裂き線が縦方向や斜め上方向に形成される。一般的には、特定方向のカット性のない単一のフィルム２にノッチ３３ａや切り込み３３ｂを形成し、これらに隣接する外側領域を厚み方向の側方（図２の紙面と直交する方向）へ引っ張ると、引き裂き線Ａはほぼ縦方向（図２の左方向水平）に進行するが、上記外側領域を外側（図２の上方向）へ引っ張ると、引き裂き線Ｂは当初はほぼ縦方向に進行するが、進行していくに従って少しずつ外側へ弧状に湾曲していく。一般的には、引き裂き線は図２に示す二点鎖線ＡとＢのいずれか、或いは、これらの中間の方位に向かうものと考えられる。このため、上述のように内端Ｐを内側領域３３−２内に配置すれば引き裂き線Ａ，Ｂはいずれも境界線３０ｃより内側で非シール部３２内に進入するが、内端Ｐを外側領域３３−１内に配置すると、引き裂き線Ａ，Ｂがシール部３１内に進入する。そして、この場合には、本来的に手切れ性を有しないシール部３１の内部で引き裂き作用が停止し、それ以上の引き裂きができなくなり、しかも、シール部３１の内側の一部が非シール部３２上に残されるため、開封そのものが不可能になる。 Here, the reason why the inner end P is arranged in the inner region 33-2 as described above is as follows. That is, when the inner end P is disposed in the outer region 33-1, the outer region 33-1 of the edge seal portion 33 is pulled so as to be pulled up to the outer side (the upper side in the drawing). Are formed in the vertical direction or obliquely upward. Generally, the notch 33a and the notch 33b are formed in the single film 2 without the cut property of a specific direction, and the outer area | region adjacent to these is to the side of a thickness direction (direction orthogonal to the paper surface of FIG. 2). When pulled, the tear line A proceeds in a substantially vertical direction (leftward horizontal in FIG. 2), but when the outer region is pulled outward (upward in FIG. 2), the tear line B initially proceeds in a substantially vertical direction. However, it gradually curves outward as it progresses. In general, it is considered that the tear line is directed to one of the two-dot chain lines A and B shown in FIG. For this reason, if the inner end P is arranged in the inner region 33-2 as described above, the tear lines A and B both enter the non-seal portion 32 on the inner side of the boundary line 30c, but the inner end P on the outer side. If it arrange | positions in the area | region 33-1, the tear lines A and B approach in the seal | sticker part 31. FIG. In this case, the tearing action is stopped inside the seal portion 31 that does not inherently have a hand cutting property, and further tearing cannot be performed, and a part inside the seal portion 31 is not sealed. Since it is left on 32, opening itself is impossible.

また、上記距離Ｌａが上記距離Ｌｂより大きく設定される理由は以下のとおりである。すなわち、上記距離Ｌａが上記距離Ｌｂと同じか、或いは、上記距離Ｌｂよりも小さいと、開封開始構造による非シール部３２の気密漏れを回避するために上記距離Ｌａを或る程度の値（５〜７ｍｍ程度、或いは、これら以上、が好ましい。）にしたとき、上記距離Ｌｂが相対的に大きくなるため、上記と同様に外側領域３３−１を側方若しくは外方へ引っ張った際に、引き裂き線Ａ，Ｂが境界線３０ｃから離れた場所で非シール部３２内に進入する。このとき、境界線３０ｃから離れた非シール部３２の一対のフィルム２はシール部３１から離間しているため、相互に厚み方向に自由に変形可能な拘束されにくい状態にあるため、一対のフィルム２のうちの少なくとも一方の引き裂き方向が縦方向（図示水平方向）から逸れ易くなり、例えば、引き裂き線が非シール部３２内で境界線３０ｃから離れる方向に逸れると、図１０に示すように、開封時の開口縁が背貼り部３から外れて収容部側に大きく逸脱してしまうなど、従来構造と同様の問題を生じやすくなる。 The reason why the distance La is set larger than the distance Lb is as follows. That is, when the distance La is the same as the distance Lb or smaller than the distance Lb, the distance La is set to a certain value (5) in order to avoid airtight leakage of the non-sealed portion 32 due to the opening start structure. When the outer region 33-1 is pulled laterally or outwardly as described above, tearing occurs when the outer region 33-1 is pulled laterally or outwardly because the distance Lb is relatively large. The lines A and B enter the non-seal portion 32 at a place away from the boundary line 30c. At this time, since the pair of films 2 of the non-seal portion 32 away from the boundary line 30c is separated from the seal portion 31, the pair of films 2 are in a state of being restrained and freely deformable in the thickness direction. The tearing direction of at least one of the two tends to deviate from the vertical direction (the horizontal direction in the drawing) .For example, when the tearing line deviates in the direction away from the boundary line 30c in the non-seal portion 32, as shown in FIG. A problem similar to that of the conventional structure is likely to occur, for example, the opening edge at the time of opening is detached from the back pasting portion 3 and greatly deviates toward the housing portion.

一方、上記距離Ｌａが上記距離Ｌｂより大きく設定されると、開封開始構造による非シール部３２の気密漏れの虞を回避しつつ、内端Ｐを境界線３０ｃに近い場所に配置できるため、引き裂き線Ａ，Ｂが境界線３０ｃに近い場所で非シール部３２に進入する。このとき、引き裂き線が形成される位置では一対のフィルム２がシール部３１に近いことにより相互に拘束されて変形しにくいため、引き裂き方向が縦方向から逸れにくくなるとともに、シール部３１を上方へ引き離そうとして引き裂き線Ａのように引き裂き方向がシール部３１の側に逸れたときには引き裂き作用が境界線３０ｃに妨げられることで境界線３０ｃに沿って引き裂き方向が案内されるので、図１１に示すように、美麗な開口縁を形成することができる。 On the other hand, if the distance La is set larger than the distance Lb, the inner end P can be disposed at a location close to the boundary line 30c while avoiding the risk of airtight leakage of the non-seal portion 32 due to the opening start structure. The lines A and B enter the non-seal portion 32 at a location close to the boundary line 30c. At this time, at the position where the tear line is formed, the pair of films 2 are constrained to each other by being close to the seal portion 31 and are not easily deformed. Therefore, the tear direction is not easily deviated from the vertical direction, and the seal portion 31 is moved upward. When the tearing direction deviates toward the seal portion 31 as shown by the tear line A to be pulled away, the tearing action is prevented by the boundary line 30c, so that the tearing direction is guided along the boundary line 30c. Thus, a beautiful opening edge can be formed.

上記の引き裂き性については、図３に示す第２構成例のように、開封開始構造として、縦方向に直線状に伸びる切り込み３３ｂを形成した場合についても、図２に示す第１実施形態の上記内容と同様である。これらの第１実施形態及び第２構成例においては、上記距離Ｌａは１〜１０ｍｍの範囲内であることが好ましいが、位置ずれなどのマージンを考慮すると、４〜７ｍｍの範囲内で設計することが望ましい。なお、上記シール幅は図示例の場合は１０ｍｍであるが、実際には５〜２５ｍｍ程度の範囲内で変化することがあるため、このシール幅の増減に応じて距離Ｌａも増減され得る。また、上記距離Ｌｂは０．５〜２．０ｍｍの範囲内であることが好ましいが、位置ずれなどのマージンを考慮すると、０．５〜１．５ｍｍの範囲内で設計することが望ましい。さらに、上述のようにＬａ＞Ｌｂが条件となるが、非シール部３２の気密漏れを防止しつつ、開封性を向上させるためには、Ｌａ≧２Ｌｂであることが好ましく、Ｌａ≧３Ｌｂであることが望ましい。 Regarding the tearability, as in the case of the second configuration example shown in FIG. 3, the case where the notch 33 b that extends linearly in the vertical direction is formed as the opening start structure, the above-described first embodiment shown in FIG. 2. It is the same as the contents. In the first embodiment and the second configuration example , the distance La is preferably in the range of 1 to 10 mm. However, in consideration of a margin such as displacement, the distance La should be designed in the range of 4 to 7 mm. Is desirable. In the illustrated example, the seal width is 10 mm, but may actually vary within a range of about 5 to 25 mm. Therefore, the distance La can be increased or decreased according to the increase or decrease of the seal width. The distance Lb is preferably in the range of 0.5 to 2.0 mm, but is preferably designed in the range of 0.5 to 1.5 mm in consideration of a margin such as displacement. Further, as described above, La> Lb is a condition. However, in order to improve the openability while preventing airtight leakage of the non-seal portion 32, it is preferable that La ≧ 2Lb, and La ≧ 3Lb. It is desirable.

フィルム２は上述のように樹脂フィルムであれば特に限定されないが、ヒートシールを用いて製袋することができるようにするために、基材層とシーラント層の二層構造を有するものであることが好ましい。また、フィルム２の厚みは２０〜１００μｍであることが好ましく、３０〜８０μｍであることが望ましい。引き裂き性については上述のように方向性を有しないもので良いが、一軸延伸フィルムなどのカット性を有するフィルムであれば、上記縦方向にカット性を有することが好ましい。 The film 2 is not particularly limited as long as it is a resin film as described above, but has a two-layer structure of a base material layer and a sealant layer so that bags can be formed using heat sealing. Is preferred. Further, it is preferred that the thickness of the film 2 is 20 ~ 100 [mu] m, it is desirable that 30 to 80 [mu] m. As for the tearability, it may be one having no directionality as described above, but if it is a film having cutability such as a uniaxially stretched film, it is preferable to have cutability in the longitudinal direction.

図４は、第３実施形態の包装用袋の拡大部分側面図（ａ）、Ｂ−Ｂ断面図（ｂ）、Ｃ−Ｃ端面図（ｃ）である。この第３実施形態では、開封開始構造として、第１実施形態と同じノッチ３３ａを有する。この実施形態が第１実施形態と異なる点は、背貼り部３を構成するフィルム２の相互に対向する一対の側縁２ｂ１，２ｂ２の間に帯状の樹脂フィルムからなるテープ６が介挿され、ヒートシール等により接着されている点のみである。テープ６は、シール部３１と一致する内外方向の範囲に配置されるとともに、当該範囲でシール部３１から端縁シール部３３内にも延伸し、さらに、当該範囲でフィルム２と接着されている。 FIG. 4 is an enlarged partial side view (a), a BB sectional view (b), and a CC end view (c) of the packaging bag of the third embodiment. In this 3rd Embodiment, it has the same notch 33a as 1st Embodiment as an opening start structure. The difference between this embodiment and the first embodiment is that a tape 6 made of a strip-shaped resin film is inserted between a pair of side edges 2b1, 2b2 of the film 2 constituting the back pasting portion 3 facing each other. It is only a point that is adhered by heat sealing or the like. The tape 6 is arranged in a range in the inner and outer direction that coincides with the seal portion 31, extends from the seal portion 31 into the edge seal portion 33 in the range, and is further bonded to the film 2 in the range. .

この実施形態では、テープ６がシール部３１に接着されているとともに、境界線３０ｃに一致する内端縁を備えているため、シール部３１の引き裂き性が全体としてさらに低下するとともに非シール部３２からシール部３１内への引き裂き線の進入がさらに困難になっている。したがって、端縁シール部３３内の開封開始構造から縦方向に背貼り部３が引き裂かれていくとき、当該引き裂き線がシール部３１内に進行しにくくなる。このため、引き裂き線がそもそも非シール部３２内に進行せずにシール部３１内を進行してしまったり、非シール部３２内からシール部３１内に進行してしまったりすることを、更に確実に防止できる。また、開封時においてシール部３１が途中でちぎれることも防止できる。 In this embodiment, since the tape 6 is bonded to the seal portion 31 and has an inner end edge that coincides with the boundary line 30c, the tearability of the seal portion 31 is further lowered as a whole and the non-seal portion 32 is provided. It is further difficult to enter the tear line into the seal portion 31. Therefore, when the back pasting portion 3 is torn in the longitudinal direction from the opening start structure in the edge seal portion 33, the tear line is less likely to advance into the seal portion 31. For this reason, it is further ensured that the tear line does not proceed into the non-sealed portion 32 but proceeds within the sealed portion 31 or from the non-sealed portion 32 into the sealed portion 31. Can be prevented. In addition, it is possible to prevent the seal portion 31 from being broken halfway during opening.

図５に示す第４構成例においても、上記テープ６を有する点のみで上記第２構成例と異なる。この第４構成例では、開封開始構造が切り込み３３ｂである点で上記第３実施形態と異なるが、テープ６による作用効果は、上記第３実施形態と同様である。 The fourth configuration example shown in FIG. 5 also differs from the second configuration example only in having the tape 6. The fourth configuration example is different from the third embodiment in that the opening start structure is the notch 33b, but the operational effects of the tape 6 are the same as those of the third embodiment.

図６は、第５実施形態の包装用袋の拡大部分側面図（ａ）、Ｂ−Ｂ断面図（ｂ）、Ｃ−Ｃ端面図（ｃ）である。この第５実施形態では、開封開始構造として、第１実施形態のノッチ３３ａの代わりに、切り込み３３ｃが形成されている。この切り込み３３ｃは、上記切り込み３３ｂとは異なり、屈折状に構成されている。すなわち、切り込み３３ｃは、端縁シール部３３の端縁（図示右端部）から外側領域３３−１内を縦方向に水平に直線状に伸びた後、縦方向に対して斜め内側（斜め下方）に傾斜した方向に直線状に伸び、内側領域３３−２に入った所に、終端部である内端Ｐを有する。 FIG. 6 is an enlarged partial side view (a), a BB sectional view (b), and a CC end view (c) of the packaging bag of the fifth embodiment. In the fifth embodiment, a cut 33c is formed as an opening start structure instead of the notch 33a of the first embodiment. Unlike the notch 33b, the notch 33c has a refractive shape. That is, the notch 33c extends from the end edge (the right end portion in the drawing) of the edge seal portion 33 in the outer region 33-1 in a straight line horizontally in the vertical direction, and then obliquely inward (slantly downward) with respect to the vertical direction. It has an inner end P that is a terminal portion at a position that extends linearly in a direction inclined to the inner region 33-2.

この実施形態では、開封開始構造としての上記切り込み３３ｃは、上記第１実施形態の包装用袋において開封開始構造として設けられたノッチ３３ａを構成する外側縁３３ａ１及び内側縁３３ａ２のうち、外側縁３３ａ１と同じ形状を有している。ただし、その内端Ｐは上述のように外側領域３３−１から内側領域３３−２へ斜めに向かう切り込み部分の先端に形成されているため、外側領域３３−１を持って開封しようとしたとき、内端Ｐから伸びる引き裂き線が外側へ伸びることをさらに効果的に抑制することができる。なお、上記のように縦方向に対して内側に斜めに伸びる切り込み部分の先端が内端Ｐとなっていることで、引き裂き線が内側へ向かう危険性も考えられるが、一般的な開封方法では引き裂き線は内端Ｐから内側へ伸びることはほとんどなく、多くの場合、外側へ伸びることを抑制し、縦方向へ水平に伸びる可能性を高めるだけである。すなわち、上記引き裂き線Ｂよりも上記引き裂き線Ａの発生確率を高めるだけである。 In this embodiment, the notch 33c as the opening start structure is the outer edge 33a1 of the outer edge 33a1 and the inner edge 33a2 constituting the notch 33a provided as the opening start structure in the packaging bag of the first embodiment. Have the same shape. However, since the inner end P is formed at the tip of the cut portion that obliquely heads from the outer region 33-1 to the inner region 33-2 as described above, when opening with the outer region 33-1 Further, it is possible to more effectively suppress the tear line extending from the inner end P from extending outward. In addition, there is a risk that the tear line is directed to the inside because the tip of the cut portion that extends obliquely inward with respect to the vertical direction is the inner end P as described above, but in a general opening method The tear line hardly extends inward from the inner end P. In many cases, the tear line is prevented from extending outward and only increases the possibility of extending horizontally in the vertical direction. That is, only the probability of occurrence of the tear line A is higher than that of the tear line B.

次に、図７は、本発明に係る第６構成例の拡大部分側面図（ａ）、Ｂ−Ｂ端面図（ｂ）及びＣ−Ｃ端面図（ｃ）である。この構成例では、非シール部３２及び端縁シール部３３におけるフィルム２の内面上にジッパーやファスナーを構成する開閉手段７が接着固定されている。開閉手段７は、内面上に縦方向に伸びる凹嵌部を備えた凹側ベース材７ａと、内面上に縦方向に伸び、上記凹嵌部と嵌合する凸嵌部を備えた凸側ベース材７ｂとを有し、凹側ベース材７ａがフィルム２の一方の側縁２ｂ１の内面に接着され、凸側ベース材７ｂがフィルム２の他方の側縁２ｂ２の内面に接着されている。また、上記凹嵌部と上記凸嵌部は上記非シール部３２内に配置されている。さらに、凹側ベース材７ａのうちの上記凹嵌部が設けられていない端部と、凸側ベース材７ｂのうちの上記凸嵌部が設けられていない端部が図示点線で示すように端縁シール部３３に配置され、上記内側領域３３−２内においてフィルム２と一体に接合されている。また、開閉手段７の外縁側（図示上側）の端縁は、上記境界線３０ｃやその延長線（外側領域３３−１と内側領域３３−２との境界）から内縁側（図示下側）に離間した位置にある。 Next, FIG. 7 is an enlarged partial side view (a), a BB end view (b), and a CC end view (c) of a sixth configuration example according to the present invention. In this configuration example , the opening / closing means 7 constituting a zipper or a fastener is bonded and fixed on the inner surface of the film 2 in the non-seal portion 32 and the edge seal portion 33. The opening / closing means 7 includes a concave base material 7a having a concave fitting portion extending in the vertical direction on the inner surface, and a convex base having a convex fitting portion extending in the vertical direction on the inner surface and fitted to the concave fitting portion. and a timber 7b, concave base member 7a is adhered on one inner surface of the side edge 2b1 of the film 2, the convex side base member 7b is adhered to the inner surface of the other side edge 2b2 of the film 2. Further, the concave fitting portion and the convex fitting portion are disposed in the non-seal portion 32. Further, the end portion of the concave base material 7a where the concave fitting portion is not provided and the end portion of the convex base material 7b where the convex fitting portion is not provided are shown by dotted lines in the drawing. It arrange | positions at the edge seal | sticker part 33 and is integrally joined with the film 2 in the said inner side area | region 33-2. Further, the edge on the outer edge side (upper side in the figure) of the opening / closing means 7 extends from the boundary line 30c and its extension line (the boundary between the outer area 33-1 and the inner area 33-2) to the inner edge side (lower side in the figure). In a spaced position.

この構成例では、上記切り込み３３ｂが端縁シール部３３の内側領域３３−２内を縦方向に伸びるように設けられ、その内端Ｐは内側領域３３−２内においてＬａ＞Ｌｂとなる位置に配置されている。このとき、内端Ｐは端縁シール部３３において内側領域３３−２内の開閉手段７が接着されている場所よりも外側（外側領域３３−１の側、すなわち、図示上側）に配置されている。特に、内端Ｐが開閉手段７よりも外側領域３３−１と内側領域３３−２の境界（境界線３０ｃの延長線）に近い位置に配置されていることが好ましい。 In this configuration example , the notch 33b is provided so as to extend in the longitudinal direction in the inner region 33-2 of the edge seal portion 33, and the inner end P thereof is at a position where La> Lb in the inner region 33-2. Has been placed. At this time, the inner end P is disposed outside the edge seal portion 33 where the opening / closing means 7 in the inner region 33-2 is bonded (on the outer region 33-1, that is, on the upper side in the drawing). Yes. In particular, the inner end P is preferably disposed at a position closer to the boundary between the outer region 33-1 and the inner region 33-2 (extension line of the boundary line 30c) than the opening / closing means 7.

また、この構成例においては、非シール部３２内において開閉手段７の凹側ベース材７ａと凸側ベース材７ｂがフィルム２の内面上に接着されているとともに、切り込み３３ｂの内端Ｐは、外側領域３３−１と内側領域３３−２の境界線と、開閉手段７との間に配置されているため、引き裂き線は非シール部３２内に入った後、境界線３０ｃと開閉手段７とに挟まれた領域内を進行していく。したがって、開閉手段７によって引き裂き線が収容部の側に逸れる虞が低減されるため、より確実かつ安定した開封作業を行うことができる。 In this configuration example , the concave base material 7a and the convex base material 7b of the opening / closing means 7 are bonded to the inner surface of the film 2 in the non-sealing portion 32, and the inner end P of the cut 33b is Since it is arranged between the boundary line between the outer region 33-1 and the inner region 33-2 and the opening / closing means 7, the tear line enters the non-sealed portion 32, and then the boundary line 30 c and the opening / closing means 7 It progresses in the area between. Therefore, the possibility of the tear line deviating toward the housing portion by the opening / closing means 7 is reduced, so that a more reliable and stable opening operation can be performed.

次に、図８は、本発明に係る第７実施形態の拡大部分側面図（ａ）、Ｂ−Ｂ端面図（ｂ）及びＣ−Ｃ端面図（ｃ）である。この実施形態では、第１実施形態とほぼ同様の構造を有するが、開封開始構造としてのノッチ３３ｄの切り欠き形状のみが異なる。ノッチ３３ｄは、全体として外側縁３３ｄ１が開口縁から縦方向にまっすぐに伸びた後に、縦方向に対して傾斜した方向に直線状に伸びるように構成されている。この外側縁３３ｄ１は第１実施形態のノッチ３３ａの外側縁３３ａ１と実質的に同じ形状を有する。また、内側縁３３ｄ２が開口縁から縦方向に沿った水平方向に伸びる直線状に構成されている。この場合、ノッチ３３ｄを外側縁３３ｄ１と内側縁３３ｄ２のみからなるものとし、外側縁３３ｄ１と内側縁３３ｄ２が合流する点を内端Ｐとしてもよいが、図示のように、外側縁３３ｄ１と内側縁３３ｄ２が合流する点からさらに縦方向に伸びる切り込み３３ｅを形成し、この切り込み３３ｅの先端を内端Ｐとすることが好ましい。このようにすると、内端Ｐから伸びる引き裂き線がさらに縦方向に近い方向に向けて進行するように規制することができる。なお、ノッチ３３ｄの先端に設けた上記切り込み３３ｅを、第１実施形態において、ノッチ３３ａの先端に設けてもよい。 Next, FIG. 8 is an enlarged partial side view (a), a BB end view (b), and a CC end view (c) of the seventh embodiment according to the present invention. This embodiment has substantially the same structure as that of the first embodiment, but only the notch shape of the notch 33d as the opening start structure is different. The notch 33d is configured to extend linearly in a direction inclined with respect to the longitudinal direction after the outer edge 33d1 extends straight from the opening edge in the longitudinal direction as a whole. The outer edge 33d1 has substantially the same shape as the outer edge 33a1 of the notch 33a of the first embodiment. Further, the inner edge 33d2 is configured in a straight line extending from the opening edge in the horizontal direction along the vertical direction. In this case, the notch 33d may be composed only of the outer edge 33d1 and the inner edge 33d2, and the point where the outer edge 33d1 and the inner edge 33d2 merge may be the inner end P. However, as illustrated, the outer edge 33d1 and the inner edge 33d It is preferable to form a notch 33e extending in the vertical direction from the point where 33d2 merges, and to set the front end of the notch 33e as the inner end P. If it does in this way, it can control so that the tear line extended from inner end P may advance toward the direction nearer the vertical direction. Note that the notch 33e provided at the tip of the notch 33d may be provided at the tip of the notch 33a in the first embodiment.

次に、図９は、本発明に係る第８実施形態の拡大部分側面図（ａ）、Ｂ−Ｂ端面図（ｂ）及びＣ−Ｃ端面図（ｃ）である。この実施形態では、第６実施形態と近似した開閉手段７′を非シール部３２に設けたものであるが、開閉手段７′では、これを構成する一対のベース材のうちの一方のベース材である凹側ベース材７ａ′がシール部３１内に伸びてフィルム２の一対の側縁２ｂ１，２ｂ２に対してその間に接着され、第３実施形態又は第４実施形態のテープ６と同様に三層構造のシール部３１を構成している点で第６実施形態の開閉手段７と異なる。なお、上記凹側ベース材７ａ′の代わりに他方のベース材である凸側ベース材７ｂをシール部３１内に延長して接着した凸側ベース材７ｂ′（図示せず）としてもよく、凹側ベース材７ａ′と凸側ベース材７ｂ′（７ｂ′は図示せず）の双方をシール部３１内に延長して接着してもよい。ただし、このように延長したベース材７ａ′，７ｂ′（７ｂ′は図示せず）には、境界線３０ｃに沿った位置に、ミシン目、ハーフカット線、微小な穿孔の列などの易開封作用を有する構造である切り裂き線を形成しておく。なお、この切り裂き線はベース材７ａ′，７ｂ′にのみ設けられるので、フィルム２による背貼り部３の密封性を損なうことはない。 Next, FIG. 9 is an enlarged partial side view (a), a BB end view (b), and a CC end view (c) of an eighth embodiment according to the present invention. In this embodiment, the opening / closing means 7 'similar to the sixth embodiment is provided in the non-seal portion 32. However, in the opening / closing means 7', one base material of a pair of base materials constituting the opening / closing means 7 'is provided. The concave base material 7a 'is extended into the seal portion 31 and bonded to the pair of side edges 2b1 and 2b2 of the film 2, and the same as the tape 6 of the third embodiment or the fourth embodiment. It differs from the opening / closing means 7 of the sixth embodiment in that it forms a layer-structured seal 31. Instead of the concave base material 7a ′, a convex base material 7b ′ (not shown) in which the convex base material 7b as the other base material is extended and bonded into the seal portion 31 may be used. Both the side base material 7a ′ and the convex base material 7b ′ (7b ′ not shown) may be extended into the seal portion 31 and bonded. However, the base materials 7a 'and 7b' (7b 'are not shown) extended in this way can be easily opened such as perforations, half-cut lines, rows of minute perforations at positions along the boundary line 30c. A tear line which is a structure having an action is formed in advance. In addition, since this tear line is provided only in base material 7a ', 7b', the sealing performance of the back pasting part 3 by the film 2 is not impaired.

また、本実施形態では、開封開始構造として、第１実施形態のノッチ３３ａの外側縁３３ａ１や第７実施形態のノッチ３３ｄの外側縁３３ｄ１と同様の形状を有する切り込み３３ｆと、この切り込み３３ｆの先端に引き続いて形成された縦方向に直線状の伸びる切り込み３３ｅとからなる切り込みを形成している。この切り込み３３ｆ，３３ｅにおいても、上記第７実施形態のノッチ３３ｄと実質的に同じ作用効果を奏することができる。 Further, in this embodiment, as an opening start structure, a notch 33f having the same shape as the outer edge 33a1 of the notch 33a of the first embodiment and the outer edge 33d1 of the notch 33d of the seventh embodiment, and the tip of the notch 33f Next, a cut formed by a vertically extending cut 33e formed in the vertical direction is formed. The cuts 33f and 33e can provide substantially the same operational effects as the notch 33d of the seventh embodiment.

尚、本発明に係る包装用袋は、上述の図示例にのみ限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。例えば、第１実施形態ないし第８実施形態において、開封開始構造としてのノッチや切り込みは、全体として引き裂き線を縦方向又はそれに近い方向に導くための外側縁及び内側縁の形状、或いは、切り込み方向を有するとともに、その内端Ｐが非シール部３２内の境界線３０ｃに近い位置に引き裂き線を導くことができる位置に配置されていればよく、上記の形状に限定されるものではない。また、各実施形態において、他の実施形態のノッチ若しくは切り込みを相互に置換して採用しても構わない。さらに、各実施形態において、開閉手段７や７′を形成するか否かを変更してもよい。また、各実施形態においては、シール部３１にテープ６を設けるか否か、テープ６を二層以上設けるか否か、などについては、適宜に変更することができる。 Note that the packaging bag according to the present invention is not limited to the illustrated examples described above, and it is needless to say that various changes can be made without departing from the gist of the present invention. For example, in the first to eighth embodiments, the notch or the notch as the opening start structure is the shape of the outer edge and the inner edge for guiding the tear line in the longitudinal direction or a direction close thereto as a whole, or the cutting direction. And the inner end P of the non-sealed portion 32 is not limited to the above-described shape as long as the tear line can be guided to a position close to the boundary line 30c. In each embodiment, the notches or notches of the other embodiments may be replaced with each other. Further, in each embodiment, whether or not the opening / closing means 7 and 7 'are formed may be changed. Moreover, in each embodiment, it can change suitably about whether the tape 6 is provided in the seal part 31, whether the tape 6 is provided with two or more layers, and the like.

１…包装用袋、２…フィルム、２ａ…表側部分、２ｂ…裏側部分、２ｂ１，２ｂ２…一対の側縁、３…背貼り部、３０ａ…外縁、３０ｂ…内縁、３０ｃ…境界線、３１…シール部、３２…非シール部、３３，３４…端縁シール部、３３−１…外側領域、３３−２…内側領域、３３ａ、３３ｄ…ノッチ、３３ａ１，３３ｄ１…外側縁、３３ａ２，３３ｄ２…内側縁、３３ｂ，３３ｃ，３３ｅ，３３ｆ…切り込み、４，５…横シール部、６…テープ、７，７′…開閉手段、７ａ…凹側ベース材、７ｂ…凸側ベース材、Ａ，Ｂ…引き裂き線（が形成された例）、Ｐ…内端 DESCRIPTION OF SYMBOLS 1 ... Packaging bag, 2 ... Film, 2a ... Front side part, 2b ... Back side part, 2b1, 2b2 ... A pair of side edge, 3 ... Back sticking part, 30a ... Outer edge, 30b ... Inner edge, 30c ... Boundary line, 31 ... Seal part, 32 ... Non-seal part, 33, 34 ... Edge seal part, 33-1 ... Outer region, 33-2 ... Inner region, 33a, 33d ... Notch, 33a1, 33d1 ... Outer edge, 33a2, 33d2 ... Inside Edges, 33b, 33c, 33e, 33f ... notches, 4, 5 ... lateral seals, 6 ... tape, 7, 7 '... opening and closing means, 7a ... concave base material, 7b ... convex base material, A, B ... Tear line (example of forming), P ... inner end

Claims

A pair of side edges (2b1, 2b2) opposite to each other in the lateral direction of the film (2) constituting the bag (1) are attached in a palm-like shape and are formed so as to extend along the vertical direction ( 3) and a pair of horizontal seal portions (4, 5) formed along the horizontal direction at both ends in the vertical direction,
The back pasting portion (3) includes an outer edge side sealing portion (31), an inner edge side non-sealing portion (32), and both sides of the sealing portion (31) and the non-sealing portion (32) in the vertical direction. An edge seal portion (33, 34) provided at the edge portion of
The edge seal portions (33, 34) are arranged on the lateral seal portions (4, 5) of the back pasting portion (3), and the lateral seal portions (4, 5) and the seal portions (31). In the packaging bag provided with the opening start structure (33a to 33f) in at least one of the edge seal portions (33, 34a), sealing the non-sealed portion (32) by being continuous with
The opening start structure (33a to 33f, 34a) has a notch (33a, 33d, 34a) or a notch (33b, 33c,) extending toward the non-seal part (32) in the edge seal part (33, 34). 33e, 33f)
The inner end (P) of the opening start structure is provided in an inner region (33-2) of the edge seal portion (33) present on the longitudinal side of the non-seal portion (32),
The distance (La) along the longitudinal direction between the inner end (P) of the opening start structure and the non-seal portion (32) is the seal portion of the inner end (P) of the opening start structure. (31) and the rather greater than the distance (Lb) along the inner and outer direction between the extension line to the longitudinal direction of the border line of the non-sealing portion (32) (30c),
The opening opening structure is the notches (33a, 33d, 34a), and the outer edges (33a1, 33d1) of the notches are formed on the seal portions (33a1, 33d1) at the longitudinal edges of the edge seal portions (33). 31) provided in an outer region (33-1) of the edge seal portion (33) existing on the longitudinal side, and at least a part from the edge toward the inner end (P). Extending in a direction inclined with respect to the longitudinal direction so as to reach an inner region (33-2) of the edge seal portion (33) existing on the longitudinal side of the portion (32), A packaging bag having an inner edge (33a2, 33d2) spaced apart from the outer edge (33a1, 33d1) on the inner edge side except for (P) .

The packaging bag according to claim 1, wherein the inner edge (33a2, 33d2) has a symmetrical shape with respect to the outer edge (33a1, 33d1) about a longitudinal axis .

The packaging bag according to claim 1, wherein the inner edges (33a2, 33d2) extend linearly in the vertical direction toward the inner end (P) .

A pair of side edges (2b1, 2b2) opposite to each other in the lateral direction of the film (2) constituting the bag (1) are attached in a palm-like shape and are formed so as to extend along the vertical direction ( 3) and a pair of horizontal seal portions (4, 5) formed along the horizontal direction at both ends in the vertical direction,
The back pasting portion (3) includes an outer edge side sealing portion (31), an inner edge side non-sealing portion (32), and both sides of the sealing portion (31) and the non-sealing portion (32) in the vertical direction. An edge seal portion (33, 34) provided at the edge portion of
The edge seal portions (33, 34) are arranged on the lateral seal portions (4, 5) of the back pasting portion (3), and the lateral seal portions (4, 5) and the seal portions (31). In the packaging bag provided with the opening start structure (33a to 33f) in at least one of the edge seal portions (33, 34a), sealing the non-sealed portion (32) by being continuous with
The opening start structure (33a to 33f, 34a) has a notch (33a, 33d, 34a) or a notch (33b, 33c,) extending toward the non-seal part (32) in the edge seal part (33, 34). 33e, 33f)
The inner end (P) of the opening start structure is provided in an inner region (33-2) of the edge seal portion (33) present on the longitudinal side of the non-seal portion (32),
The distance (La) along the longitudinal direction between the inner end (P) of the opening start structure and the non-seal portion (32) is the seal portion of the inner end (P) of the opening start structure. (31) and the rather greater than the distance (Lb) along the inner and outer direction between the extension line to the longitudinal direction of the border line of the non-sealing portion (32) (30c),
The opening start structure is the cut (33b, 33c, 33e, 33f), and the cut is the longitudinal direction of the seal portion (31) at the longitudinal edge portion of the edge seal portion (33). And provided in an outer region (33-1) of the edge seal portion existing on the side of the edge portion, and at least a part of the non-seal portion (32) in the longitudinal direction from the edge portion toward the inner end (P). The packaging bag, which extends in a direction inclined with respect to the longitudinal direction so as to reach an inner region (33-2) of the edge seal portion (33) existing on the side .

A notch (33e) extending in the longitudinal direction is connected to a tip of the outer edge (33a1, 33d1) or the notch (33f) extending in a direction inclined with respect to the longitudinal direction, and the notch extending in the longitudinal direction The packaging bag according to any one of claims 1 to 4, wherein the tip of (33e) is the inner end (P).

The packaging bag according to any one of claims 1 to 5, wherein the distance (La) is within a range of 3 to 7 times the distance (Lb) .

The seal portion (31) has an end edge or a tear in the inner edge of the seal portion (31) between the pair of side edges (2b1, 2b2) of the film (2) in the back pasting portion (3). The packaging bag according to any one of claims 1 to 6, wherein the packaging bag has at least a three-layer structure in which a tape portion (6, 7a ') having a line is interposed.

A pair of opening and closing members (7a) that are attached to the inner surfaces of the pair of side edges (2b1, 2b2) of the film (2) and can be engaged with and disengaged from each other on the non-seal portion (32). , 7b), and the opening / closing means (7) is separated from the boundary line (30c) between the seal portion (31) and the non-sealing portion (32) toward the inner edge side. The packaging bag according to any one of claims 1 to 6, wherein the packaging bag is disposed.