JP2019177886A

JP2019177886A - Packing bag

Info

Publication number: JP2019177886A
Application number: JP2018067135A
Authority: JP
Inventors: 史絵松永; Fumie Matsunaga; 隼人浅井; Hayato Asai
Original assignee: Toyo Seikan Kaisha Ltd
Current assignee: Toyo Seikan Group Holdings Ltd
Priority date: 2018-03-30
Filing date: 2018-03-30
Publication date: 2019-10-17
Anticipated expiration: 2038-03-30
Also published as: JP7238264B2

Abstract

To provide a packing bag which enables cut-off of a tearing piece in a stroke at opening while controlling the reduction of stored contents in the packing bag.SOLUTION: A packing bag 1 is opened from an opening starting side seal part 2, where an easy opening part 10 is formed, through a storing part 3, to an opening ending side seal part 4. The opening ending side seal part 4 has an inclined inner margin 5 which crosses an imaginary opining line 12 which extends from the easy opening part 10 to the opening direction, and the inclined inner margin 5 has a curving part 51, curving convexly toward the outer rim of the packing bag, and a linear part 52 which is connecting to an end 5b of the curving part 51 on the side of opening ending side.SELECTED DRAWING: Figure 1

Description

本発明は、包装袋に係り、より詳細には、手指で一方のサイドシール部から他方のサイドシール部まで開封される包装袋に関する。 The present invention relates to a packaging bag, and more particularly, to a packaging bag opened from one side seal part to the other side seal part with fingers.

近年、レトルトパウチのように内容物を収容した包装袋が広く利用されている。かかる包装袋の多くは、上部シール部に近い部分を一方のサイドシール部から他方のサイドシール部まで手指で引き裂くことによって開封される。そのため、多くの包装袋のサイドシール部には、ノッチや切り込みのような易開封部が形成されている。 In recent years, packaging bags containing contents such as retort pouches have been widely used. Many of such packaging bags are opened by tearing a portion near the upper seal portion from one side seal portion to the other side seal portion with fingers. For this reason, easy opening portions such as notches and cuts are formed in the side seal portions of many packaging bags.

レトルトカレーのような粘稠性の内容物が収容された包装袋を開封する際には、包装袋を端から端まで引き裂くだけでなく、引き裂いた破断片が切り離されることが望ましい。破断片が切り離されずに残ると、内容物を取り出す際に、破断片に付着している内容物が手に付着してしまうことがある。また、切れ残った破断片を無理に引き千切ろうとすると、その弾みで破断片に付着していた内容物が周囲に飛び散ってしまうことがある。 When opening a packaging bag containing a viscous content such as a retort curry, it is desirable not only to tear the packaging bag from end to end but also to tear off the torn pieces. If the broken pieces remain without being separated, the contents attached to the broken pieces may adhere to the hand when the contents are taken out. In addition, if the broken pieces that are left uncut are forcibly pulled, the contents attached to the broken pieces may be scattered around by the momentum.

図４及び図５に、従来の包装袋を開封する様子を示す。従来例の包装袋は、表フィルム１０１ａと裏フィルム１０１ｂとを重ね合わせ、左右のサイドシール部１０２、１０４、トップシール部１０６、及びボトムシール部１０８により四方をヒートシールした平パウチである。図４及び図５に示す例では、左側のサイドシール部１０２のノッチ１１０から右側のサイドシール部１０４まで包装袋を開封する。破断片１００が右側へ移動するにつれて、表フィルム１０１ａ及び裏フィルム１０１ｂを引き裂いた破断線１１０ａ及び１１０ｂが右側のサイドシール部１０４へ向かって形成されていく。 4 and 5 show how a conventional packaging bag is opened. The packaging bag of the conventional example is a flat pouch in which the front film 101a and the back film 101b are overlapped, and the left and right side seal portions 102 and 104, the top seal portion 106, and the bottom seal portion 108 are heat sealed. In the example shown in FIGS. 4 and 5, the packaging bag is opened from the notch 110 of the left side seal portion 102 to the right side seal portion 104. As the broken piece 100 moves to the right side, break lines 110 a and 110 b that tear the front film 101 a and the back film 101 b are formed toward the right side seal portion 104.

左右のサイドシール部１０２及び１０４の間の収納部では、図５（Ａ）に示すように、表フィルム１０１ａの破断線１１０ａと裏フィルム１０１ｂの破断線１１０ｂとが上下にずれることが多い。その結果、破断線１１０ａと破断線１１０ｂは、右側のサイドシール部１０４の内縁１０４ａ上で互いに異なる位置にしばしば到達する。 In the storage part between the left and right side seal parts 102 and 104, as shown in FIG. 5A, the break line 110a of the front film 101a and the break line 110b of the back film 101b often shift vertically. As a result, the break line 110a and the break line 110b often reach different positions on the inner edge 104a of the right side seal portion 104.

さらに、図５（Ｂ）に、図５（Ａ）中の破線Ｃで囲まれた部分の拡大図を示す。サイドシール部１０４の内縁１０４ａ上において、表フィルム１０１ａの破断線１１０ａの到達点Ｐａと、裏フィルム１０１ｂの破断線１１０ｂの到達点Ｐｂとは、間隔Ｗだけ離れている。到達点Ｐａ及びＰｂから更にサイドシール部１０４を引き裂くためには、この間隔Ｗの幅でサイドシール部１０４の融着部分を引き剥がす必要がある。しかし、サイドシール部１０４を引き剥がしつつ破断させるには大きな力を必要とするため、破断片１００を切り離すことが困難な場合が少なくない。 FIG. 5B is an enlarged view of a portion surrounded by a broken line C in FIG. On the inner edge 104a of the side seal portion 104, the arrival point Pa of the breaking line 110a of the front film 101a and the arrival point Pb of the breaking line 110b of the back film 101b are separated by a distance W. In order to further tear the side seal portion 104 from the reaching points Pa and Pb, it is necessary to peel off the fused portion of the side seal portion 104 with a width of the interval W. However, since a large force is required to break the side seal portion 104 while peeling off, it is often difficult to separate the broken piece 100.

そこで、破断片を容易に切り離すことができる包装袋の一例が、特許文献１に記載されている。特許文献１には、開封終端側シール部が傾斜内縁を有する包装袋が開示されている。この包装袋の開封時には、表フィルムの破断線と裏フィルムの破断線とが傾斜内縁上で合流して、開封終端側シール部の領域を進む。その結果、開封終端側シール部を小さな剪断力で引き裂くことができるので、包装袋の破断片を容易に切り離すことができる。 Thus, Patent Document 1 describes an example of a packaging bag that can easily cut a broken piece. Patent Document 1 discloses a packaging bag in which the unsealing end side seal portion has an inclined inner edge. At the time of opening the packaging bag, the break line of the front film and the break line of the back film merge on the inclined inner edge, and advance through the region of the unsealing end side seal portion. As a result, since the unsealing end side seal portion can be torn with a small shearing force, the broken pieces of the packaging bag can be easily separated.

特開２０１６−２０３９９０号公報JP, 2006-203990, A

ところで、表フィルムの破断線と裏フィルムの破断線とが傾斜内縁１０５上で合流するためには、表フィルムの破断線と裏フィルムの破断線とが傾斜内縁１０５まで到達する必要がある。このため、傾斜内縁１０５は、易開封部１１０から開封方向に延びる開封仮想直線１１２よりもある程度の距離だけ下側に離れた位置まで延びている必要がある。その結果、包装袋の開封終端側シール部１０４に直線状の傾斜内縁１０５を形成すると、図６に示す包装袋の右上のコーナー部で開封終端側シール部１０４の面積が増加した分だけ、包装袋の容量が減少してしまうことになる。 By the way, in order for the break line of the front film and the break line of the back film to merge on the inclined inner edge 105, the break line of the front film and the break line of the back film need to reach the inclined inner edge 105. For this reason, the inclined inner edge 105 needs to extend to a position away from the easy-opening portion 110 by a certain distance from the opening virtual straight line 112 extending in the opening direction. As a result, when the linear inclined inner edge 105 is formed in the unsealing end side seal portion 104 of the packaging bag, the packaging area is increased by the amount of increase in the area of the unsealing end side seal portion 104 at the upper right corner portion of the packaging bag shown in FIG. The capacity of the bag will be reduced.

そこで、包装袋の傾斜内縁の形成による容量の減少を抑制するために、例えば、図６中に破線１０７で示すように、直線状の傾斜内縁１０５を包装袋の外縁に向かって凸状に湾曲した円弧形状１０７にすることが考えられる。
しかしながら、傾斜内縁を円弧形状１０７にすると、特に、開封終端近くで、円弧形状１０７の接線方向Ｓと、易開封部１１０から延びる開封仮想直線１１２と平行な開封方向Ｔとの成す角度θが大きくなってしまう。このため、包装袋の開封時に、表及び裏フィルムの破断線のうち円弧形状１０７の傾斜内縁に先に到達した破断線が、他方の破断線と合流するまで、円弧形状に沿って進む間、特に開封終端近くで、破断片を引っ張る力のうち円弧形状に沿った方向Ｓに破断線を進める分力成分が小さくなる。その結果、開封時に破断片を引っ張る手指が引っ掛かりを感じることになる。 Therefore, in order to suppress a decrease in capacity due to the formation of the inclined inner edge of the packaging bag, for example, as shown by a broken line 107 in FIG. 6, the linear inclined inner edge 105 is curved convexly toward the outer edge of the packaging bag. It is conceivable that the circular arc shape 107 is used.
However, when the inclined inner edge has the arc shape 107, the angle θ between the tangential direction S of the arc shape 107 and the opening direction T parallel to the opening virtual straight line 112 extending from the easy-opening portion 110 is particularly large near the opening end. turn into. For this reason, while opening the packaging bag, while the break line that has reached the inclined inner edge of the arc shape 107 out of the break lines of the front and back films first proceeds along the arc shape until it merges with the other break line, In particular, near the end of opening, the component of force that advances the break line in the direction S along the arc shape becomes smaller in the force that pulls the broken piece. As a result, the finger that pulls the broken piece at the time of opening feels being caught.

本発明は、上記の事情に鑑みてなされたものであり、包装袋の容量の減少を抑制しつつ、包装袋を開封始端側シール部から収納部を通り開封終端側シール部まで開封するときに、引っ掛かりを感じることなく破断片を一気に切り離すことができる包装袋を提供することを目的としている。 The present invention has been made in view of the above circumstances, and when the packaging bag is opened from the opening start end side seal portion to the opening end side seal portion through the storage portion while suppressing a decrease in the capacity of the packaging bag. An object of the present invention is to provide a packaging bag capable of separating broken pieces at a stroke without feeling caught.

本発明の包装袋は、易開封部が形成された開封始端側シール部から収納部を通り開封終端側シール部まで開封される包装袋であって、前記開封終端側シール部は、前記易開封部から開封方向に延びる開封仮想直線と斜めに交差する傾斜内縁を有し、前記傾斜内縁は、前記包装袋の外縁に向かって凸状に湾曲した曲線区間と、前記曲線区間の開封終端側の端部に連続した直線区間と有することを特徴としている。 The packaging bag of the present invention is a packaging bag which is opened from the opening start side seal part formed with the easy opening part through the storage part to the opening end side seal part, and the opening end side seal part is the easy opening part. An inclined inner edge that obliquely intersects with an opening virtual straight line extending in the opening direction from the portion, the inclined inner edge being curved in a convex shape toward the outer edge of the packaging bag, and on the opening end side of the curved section It is characterized by having a continuous straight section at the end.

本発明の包装袋によれば、傾斜内縁が、包装袋の外縁に向かって凸状に湾曲した曲線区間を有するため、開封終端側シール部に傾斜内縁を設けることによる包装袋の容量の減少が抑制される。
また、傾斜内縁は、曲線区間の開封終端側の端部に連続した直線区間を有するため、特に、開封終端近くで、傾斜内縁の接線方向と開封方向との成す角度が大きくなることが回避される。その結果、包装袋を開封始端側のシール部から収納部を通り開封終端側のシール部まで開封するときに、引っ掛かりを感じることなく破断片を一気に切り離すことができる。 According to the packaging bag of the present invention, since the inclined inner edge has a curved section that is convexly curved toward the outer edge of the packaging bag, the capacity of the packaging bag is reduced by providing the inclined inner edge at the sealing end side seal portion. It is suppressed.
In addition, since the inclined inner edge has a straight section that is continuous to the end of the curved section on the opening end side, it is avoided that the angle formed between the tangential direction of the inclined inner edge and the opening direction is increased particularly near the opening end. The As a result, when the packaging bag is opened from the seal part on the opening start side to the seal part on the opening end side through the storage part, the broken pieces can be separated at a time without feeling caught.

本発明の包装袋によれば、包装袋の容量の減少を抑制しつつ、包装袋を開封始端側のシール部から収納部を通り開封終端側のシール部まで開封するときに、引っ掛かりを感じることなく破断片を一気に切り離すことができる。 According to the packaging bag of the present invention, when the packaging bag is opened from the seal part on the opening start side to the seal part on the opening end side through the storage part while suppressing a decrease in the capacity of the packaging bag, the user feels a catch. The broken pieces can be separated at once.

本発明の第１実施形態に係る包装袋の正面図である。It is a front view of the packaging bag which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る包装袋の開封する際の破断線の誘導を説明する正面図である。It is a front view explaining the induction | guidance | derivation of the broken line at the time of opening the packaging bag which concerns on 1st Embodiment of this invention. 本発明の第２実施形態に係る包装袋の正面図である。It is a front view of the packaging bag which concerns on 2nd Embodiment of this invention. 従来例の包装袋の開封状態を示す正面図である。It is a front view which shows the open state of the packaging bag of a prior art example. （Ａ）は、従来例の包装袋の開封状態を示す正面図であり、（Ｂ）は、（Ａ）中の破線Ｃで囲まれた部分の拡大図である。(A) is a front view which shows the opening state of the packaging bag of a prior art example, (B) is an enlarged view of the part enclosed with the broken line C in (A). 従来例の包装袋の正面図である。It is a front view of the packaging bag of a prior art example.

以下、図面を参照して本発明の包装袋の実施形態を説明する。
（第１実施形態）
図１に、本発明の第１実施形態に係る包装袋１の正面図を示す。この包装袋１は、表フィルム１ａと裏フィルム１ｂとを重ね合わせた平パウチである。
表フィルム１ａ及び裏フィルム１ｂは、例えば、ポリオレフィン層上にナイロン層を積層した積層フィルムである。
なお、表フィルム１ａ及び裏フィルム１ｂには、熱溶着可能な種々の材料及び構成を採用することができる。例えば、表フィルム１ａ及び裏フィルム１ｂは、熱溶着可能な熱可塑性樹脂からなる単層フィルムにより構成してもよいし、溶着面をヒートシール性樹脂とする積層フィルムにより構成してもよい。積層フィルムは、中間層としてアルミニウム層のようなバリア層を設けた積層構造としてもよいし、表層にバリア層を設けた積層構造としてもよい。また、積層フィルムは、樹脂層を基材としてもよいし、紙を基材としてもよい。 Hereinafter, embodiments of the packaging bag of the present invention will be described with reference to the drawings.
(First embodiment)
In FIG. 1, the front view of the packaging bag 1 which concerns on 1st Embodiment of this invention is shown. The packaging bag 1 is a flat pouch in which a front film 1a and a back film 1b are overlapped.
The front film 1a and the back film 1b are, for example, laminated films in which a nylon layer is laminated on a polyolefin layer.
In addition, various materials and structures that can be thermally welded can be employed for the front film 1a and the back film 1b. For example, the front film 1a and the back film 1b may be constituted by a single layer film made of a heat-sealable thermoplastic resin, or may be constituted by a laminated film having a welding surface as a heat-sealable resin. The laminated film may have a laminated structure in which a barrier layer such as an aluminum layer is provided as an intermediate layer, or a laminated structure in which a barrier layer is provided on the surface layer. The laminated film may have a resin layer as a base material or paper as a base material.

包装袋１には、開封口形成予定側を上側として、上端縁のトップシール部６と、易開封部１０が形成された開封始端側シール部２と、開封終端側シール部４とが形成されている。これらのシール部２，４，６で囲まれた収納部３には、例えば、底部より内容物が充填される。内容物充填後、底部（下端縁）を熱溶着してボトムシール部を形成することによって、内容物が密封包装される。 The packaging bag 1 is formed with a top seal part 6 at the upper edge, an opening start side seal part 2 in which an easy opening part 10 is formed, and an opening end side seal part 4 with the opening opening formation scheduled side as an upper side. ing. The storage part 3 surrounded by these seal parts 2, 4 and 6 is filled with contents from the bottom, for example. After filling the contents, the bottom part (lower end edge) is thermally welded to form a bottom seal part, whereby the contents are hermetically packaged.

さらに、包装袋１の開封終端側シール部２は、トップシール部６の下縁６ａに繋がる傾斜内縁５を有する。傾斜内縁５は、易開封部１０から開封方向に延びる開封仮想直線１２と斜めに交差する。
傾斜内縁５は、包装袋１の外縁に向かって凸状に湾曲した曲線区間５１と、曲線区間５１の開封終端側の端部５ｂに連続した直線区間５２とを有する。曲線区間５１は、例えば、円弧形状を有する。また、直線区間５２は、曲線区間５１の端部５ｂでの接線方向に延長されている。
本実施形態では、曲線区間５１は、開封仮想直線１２よりも上側に配置され、直線区間５１は、開封仮想直線１２よりも下側に配置されている。曲線区間５１の開封終端側の端部５ｂは、開封仮想直線１２上に位置している。
なお、曲線区間５１の開封終端側の端部５ｂは、開封仮想直線１２よりも上側に位置してもよいし、下側に位置してもよい。 Further, the unsealing end side seal portion 2 of the packaging bag 1 has an inclined inner edge 5 connected to the lower edge 6 a of the top seal portion 6. The inclined inner edge 5 obliquely intersects with the opening virtual straight line 12 extending in the opening direction from the easy opening portion 10.
The inclined inner edge 5 has a curved section 51 curved in a convex shape toward the outer edge of the packaging bag 1 and a straight section 52 continuous to the end portion 5b on the unsealing end side of the curved section 51. The curve section 51 has, for example, an arc shape. The straight section 52 is extended in the tangential direction at the end 5 b of the curved section 51.
In the present embodiment, the curved section 51 is disposed above the unsealed virtual straight line 12, and the straight section 51 is disposed below the unsealed virtual straight line 12. An end portion 5 b on the unsealing end side of the curved section 51 is located on the unsealing virtual straight line 12.
Note that the end portion 5b on the unsealing end side of the curved section 51 may be located above or below the unsealing virtual straight line 12.

傾斜内縁５が包装袋１の外縁に向かって凸状に湾曲した曲線区間５１を有するため、開封終端側シール部４に傾斜内縁５を設けることによる包装袋の容量の減少が抑制される。
さらに、トップシール部６の下縁６ａに、傾斜内縁５の始端５ａから曲線区間５１が連続しているため、易開封部１０と傾斜内縁５の開封始端側の始端５ａとを結ぶ直線と、始端５ａにおける傾斜内縁５の接線との成す角度θ１が、傾斜内縁５を始端５ａと終端５ｃとを結ぶ直線のみとした場合よりも小さくなる。その結果、易開封部１０から進んできた破断線が傾斜内縁５に沿って容易に誘導される。好ましくは、角度θ１は０°〜６０°、より好ましくは、０°〜４５°、更により好ましくは、０°〜３０°である。 Since the inclined inner edge 5 has the curved section 51 curved in a convex shape toward the outer edge of the packaging bag 1, the decrease in the capacity of the packaging bag due to the provision of the inclined inner edge 5 in the unsealing end side seal portion 4 is suppressed.
Furthermore, since the curved section 51 is continuous from the lower edge 6a of the top seal portion 6 from the start end 5a of the inclined inner edge 5, a straight line connecting the easy opening portion 10 and the start end 5a on the opening start end side of the inclined inner edge 5; The angle θ1 formed with the tangent line of the inclined inner edge 5 at the starting end 5a is smaller than when the inclined inner edge 5 is only a straight line connecting the starting end 5a and the terminating end 5c. As a result, the break line that has advanced from the easy-opening portion 10 is easily guided along the inclined inner edge 5. Preferably, the angle θ1 is 0 ° to 60 °, more preferably 0 ° to 45 °, and still more preferably 0 ° to 30 °.

また、傾斜内縁５は、曲線区間５１の開封終端側の端部５ｂに連続した直線区間５２を有するため、特に、傾斜内縁５の終端５ｃ近くで、傾斜内縁５の接線方向Ｓと開封方向Ｔとの成す角度θ２が大きくなることが回避される。その結果、包装袋１を開封始端側シール部２から収納部３を通り開封終端側シール部４まで開封するときに、引っ掛かりを感じることなく破断片を一気に切り離すことができる。
好ましくは、開封方向Ｔに沿った開封仮想直線１２と、傾斜内縁５の開封終端側の終端５ｃにおける傾斜内縁５の接線との成す角度θ２は、１０°〜５０°である。 Further, since the inclined inner edge 5 has a straight section 52 continuous with the end portion 5b on the unsealing end side of the curved section 51, the tangential direction S and the unsealing direction T of the inclined inner edge 5 are particularly close to the end 5c of the inclined inner edge 5. It is avoided that the angle θ2 formed by is increased. As a result, when the packaging bag 1 is opened from the opening start side seal part 2 to the opening end side seal part 4 through the storage part 3, the broken pieces can be separated at a time without feeling caught.
Preferably, the angle θ2 formed by the virtual opening straight line 12 along the opening direction T and the tangent line of the inclined inner edge 5 at the terminal end 5c on the opening end side of the inclined inner edge 5 is 10 ° to 50 °.

なお、開封仮想直線１２は、開封始端側シール部２に形成された切込みの易開封部１０から開封終端側のシール部４に向けて開封するときに、易開封部１０よりも上側の、破断片となる部分が手指で引っ張られる開封方向に沿った仮想線である。本実施形態のように、包装袋の外縁が実質的に長方形を有する場合には、図１に示すように、開封仮想直線１２は対称軸線１１と直交し、トップシール部６の直線状の下縁６ａと平行に延在する。 The opening imaginary straight line 12 is opened on the opening start end side seal part 2 from the cut easy opening part 10 toward the seal part 4 on the opening end side. The part which becomes a fragment is an imaginary line along the opening direction in which the finger is pulled. When the outer edge of the packaging bag has a substantially rectangular shape as in this embodiment, as shown in FIG. 1, the unsealed virtual straight line 12 is perpendicular to the symmetry axis 11, and the bottom of the top seal portion 6 is straight. It extends parallel to the edge 6a.

次に、図２を参照して、包装袋１を開封する際の破断線の誘導を説明する。
包装袋１を開封する際には、易開封部１０が形成された開封始端側シール部２から収納部３を通り開封終端側シール部４まで開封される。
具体的には、まず、易開封部１０よりも上側の部分を手指で開封終端側シール部４に向かって引っ張ることにより、易開封部１０から開封始端側シール部２が破断する。そして、易開封部１０よりも上側の部分が破断片となる。 Next, with reference to FIG. 2, the induction | guidance | derivation of the broken line at the time of opening the packaging bag 1 is demonstrated.
When the packaging bag 1 is opened, the packaging bag 1 is opened from the opening start end side seal portion 2 where the easy opening portion 10 is formed to the opening end side seal portion 4 through the storage portion 3.
Specifically, first, the portion above the easy-opening portion 10 is pulled toward the unsealing end-side seal portion 4 with fingers, whereby the unsealing start side seal portion 2 is broken from the easy-opening portion 10. And the part above the easy-open part 10 becomes a broken piece.

さらに、破断片を図面右方向へ引っ張ると、収納部３で表フィルム１ａ及び裏フィルム１ｂがそれぞれ開裂し、表フィルム１ａの破断線（表破断線）１０ａと裏フィルム１ｂの破断線（裏破断線）１０ｂが終端側シール部４へ向かって延びていく。このとき、図２に示すように、表破断線１０ａと裏破断線１０ｂとが上下にずれる表裏ずれが発生することが多い。 Further, when the broken piece is pulled to the right in the drawing, the front film 1a and the back film 1b are cleaved in the storage portion 3, and the break line (front break line) 10a of the front film 1a and the break line (back break) of the back film 1b. Line 10b extends toward the end-side seal portion 4. At this time, as shown in FIG. 2, there is often a front-back displacement in which the front break line 10a and the back break line 10b are shifted up and down.

図２に示す例では、裏破断線１０ｂが傾斜内縁５の曲線区間５１上の点Ａ１に先に到達する。点Ａ１に到達した裏破断線１０ｂは、傾斜内縁５に沿って進む。
次いで、表破断線１０ａが、傾斜内縁５上の点Ａ２で、傾斜内縁５に沿って進んできた裏破断線１０ｂと合流する。さらに、点Ａ２から破断線１０ｃが終端側シール部４を進み、破断片が切り離される。
このとき、曲線区間５１を直径１１８ｍｍ〜１８６ｍｍの内接円の円弧とすることで、表裏ずれが発生しても表破断線１０ａ又は裏破断線１０ｂのいずれかが必ず傾斜内縁５の曲線区間５１上に到達するため、破断線が傾斜内縁５に沿って容易に誘導されるようになる。 In the example shown in FIG. 2, the reverse break line 10 b reaches the point A <b> 1 on the curved section 51 of the inclined inner edge 5 first. The reverse fracture line 10b that has reached the point A1 proceeds along the inclined inner edge 5.
Next, the front break line 10 a joins the back break line 10 b that has traveled along the inclined inner edge 5 at a point A 2 on the inclined inner edge 5. Further, the break line 10c advances from the point A2 through the end side seal portion 4, and the broken piece is cut off.
At this time, by making the curved section 51 an arc of an inscribed circle having a diameter of 118 mm to 186 mm, either the front break line 10a or the back break line 10b is always the curved section 51 of the inclined inner edge 5 even if the front / back deviation occurs. In order to reach the top, the breaking line is easily guided along the inclined inner edge 5.

裏破断線１０ｂが、点Ａ１から端部５ｂまでの曲線区間５１に沿って進むに従って、破断線１０ｂの進行する方向と、開封仮想直線１２を平行な開封方向との成す角度が徐々に大きくなるが、端部５ｂから先の直線区間５２では、この角度が大きくならない。その結果、裏破断線１０ｂが直線区間５２に沿って進む間、破断片を引っ張る力のうち傾斜内縁５に沿った方向に破断線を進める分力成分は減少しない。その結果、裏破断線１０ｂが点Ａ２で表破断線１０ａと合流するまでに、破断片を引っ張る手指が引っ掛かりを感じることが回避され、破断片を一気に切り離すことができる。 As the back breaking line 10b advances along the curved section 51 from the point A1 to the end 5b, the angle formed by the direction in which the breaking line 10b proceeds and the opening direction of the opening virtual straight line 12 is gradually increased. However, this angle does not increase in the straight section 52 beyond the end 5b. As a result, the component component that advances the break line in the direction along the inclined inner edge 5 out of the force pulling the broken piece does not decrease while the back break line 10b travels along the straight section 52. As a result, it is avoided that the finger that pulls the broken piece feels being caught until the back broken line 10b joins the front broken line 10a at the point A2, and the broken piece can be separated at once.

（第２実施形態）
図３に、本発明の第２実施形態に係る包装袋の正面図を示す。本実施形態の包装袋は、開封終端側シール部４０の傾斜内縁５０の配置及び形状を除き、第１実施形態の包装袋１と同一の鋼製を有する。このため、第１実施形態の包装袋１と同一の構成要素に、同一の符号を付し、それらの詳細な説明を省略する。 (Second Embodiment)
In FIG. 3, the front view of the packaging bag which concerns on 2nd Embodiment of this invention is shown. The packaging bag of the present embodiment is made of the same steel as the packaging bag 1 of the first embodiment except for the arrangement and shape of the inclined inner edge 50 of the unsealing end side seal portion 40. For this reason, the same code | symbol is attached | subjected to the component same as the packaging bag 1 of 1st Embodiment, and those detailed description is abbreviate | omitted.

本実施形態における、包装袋の開封終端側シール部４０は、トップシール部６の下縁６ａに繋がり、易開封部１０から開封方向に延びる開封仮想直線１２と斜めに交差する傾斜内縁５０を有する。傾斜内縁５０は、開封始端側の端部（始端）５ｄと開封終端側の端部（終端）５ｈとの間に、第１の曲線区間５３と、第１の直線区間５４と、第２の曲線区間５５と、第２の直線区間５６とを有する。
傾斜内縁５０が包装袋の外縁に向かって凸状に湾曲した第１の曲線区間５３を有するため、開封終端側シール部４に傾斜内縁５０を設けることによる包装袋の容量の減少が抑制される。 The unsealing end side seal portion 40 of the packaging bag in the present embodiment has an inclined inner edge 50 that is connected to the lower edge 6a of the top seal portion 6 and obliquely intersects with the opening virtual straight line 12 extending from the easy opening portion 10 in the opening direction. . The inclined inner edge 50 includes a first curve section 53, a first straight section 54, and a second straight section between an opening start end 5d and an opening end end 5h. It has a curved section 55 and a second straight section 56.
Since the inclined inner edge 50 has the first curved section 53 that is convexly curved toward the outer edge of the packaging bag, a decrease in the capacity of the packaging bag due to the provision of the inclined inner edge 50 in the unsealing end side seal portion 4 is suppressed. .

第１の曲線区間５３は、開封始端側の端部５ｄで、トップシール部６の下縁６ａに連続し、包装袋の外縁に向かって凸状に湾曲した円弧形状を有する。易開封部１０と傾斜内縁５０の開封始端側の端部５ｄとを結ぶ直線と、傾斜内縁５０の第１の曲線区間５３の端部５ｄにおける接線との成す角度は、０°〜６０°、より好ましくは、０°〜４５°、更により好ましくは、０°〜３０°である。
第１の曲線区間５３を設けたことにより、破断線が開封仮想直線１２よりも上側にずれた場合であっても、傾斜内縁５上の破断線の到達点における破断線と傾斜内縁５０との成す角度が小さくなる。その結果、図６に示した直線状の傾斜内縁１０５よりも、破断線が傾斜内縁５０に沿いやすくなる。 The first curved section 53 has an arc shape that is continuous with the lower edge 6a of the top seal portion 6 and curved convexly toward the outer edge of the packaging bag. The angle formed between the straight line connecting the easy-opening portion 10 and the end portion 5d on the opening start end side of the inclined inner edge 50 and the tangent line at the end portion 5d of the first curved section 53 of the inclined inner edge 50 is 0 ° to 60 °, More preferably, it is 0 ° to 45 °, and still more preferably 0 ° to 30 °.
By providing the first curve section 53, even if the break line is shifted to the upper side of the opened virtual straight line 12, the break line and the inclined inner edge 50 at the arrival point of the break line on the inclined inner edge 5 The formed angle becomes smaller. As a result, the fracture line is easier to follow along the inclined inner edge 50 than in the linear inclined inner edge 105 shown in FIG.

第１の直線区間５４は、第１の曲線区間５３の開封終端側の端部５ｅに連続し、第１の曲線区間５３の端部５ｅでの接線方向に延長されている。
第１の直線区間５４を設けたことにより、第１の曲線区間５３を端部５ｅよりも先に延ばした場合よりも、破断線を開封終端側へ誘導することができる。 The first straight section 54 is continuous with the end portion 5 e on the unsealing end side of the first curved section 53 and extends in the tangential direction at the end section 5 e of the first curved section 53.
By providing the first straight section 54, the break line can be guided to the unsealing end side as compared with the case where the first curved section 53 is extended before the end portion 5e.

第２の曲線区間５５は、第１の直線区間５４の開封終端側の端部５ｆに連続し、包装袋の外縁に向かって凸状に湾曲した円弧形状を有する。第２の曲線区間５５の端部５ｆでの接線の傾きは、第１の直線区間５４の傾きと一致している。
また、第２の曲線区間５５の円弧は、第１の曲線区間５３の円弧の曲率半径よりも小さい曲率半径を有している。
第２の曲線区間５５を設けたことにより、傾斜内縁５０が、開封仮想直線１２よりも図面下側まで延びるので、破断線が開封仮想直線１２よりも下側にずれた場合にも、破断線が傾斜内縁５０に到達する可能性を高くすることができる。 The second curved section 55 is continuous with the end portion 5f on the unsealing end side of the first straight section 54, and has an arc shape that is curved in a convex shape toward the outer edge of the packaging bag. The slope of the tangent line at the end 5 f of the second curve section 55 matches the slope of the first straight section 54.
In addition, the arc of the second curved section 55 has a radius of curvature that is smaller than the radius of curvature of the arc of the first curved section 53.
By providing the second curved section 55, the inclined inner edge 50 extends to the lower side of the drawing with respect to the opened virtual straight line 12, so that even when the broken line is shifted downward with respect to the opened virtual straight line 12, the broken line Can increase the possibility of reaching the inclined inner edge 50.

第２の直線区間５６は、第２の曲線区間５５の開封終端側の端部５ｇに連続し、第２の曲線区間５５の端部５ｇでの接線方向に延長されている。
第２の直線区間５６を設けたことにより、第２の曲線区間５５の円弧を端部５ｇよりも先に延ばした場合よりも、特に、傾斜内縁５０の終端５ｈ近くで、傾斜内縁５０の接線方向と開封方向との成す角度が大きくなることが回避される。その結果、包装袋を開封始端側シール部２から収納部３を通り開封終端側シール部４まで開封するときに、引っ掛かりを感じることなく破断片を一気に切り離すことができる。 The second straight section 56 is continuous with the end portion 5g on the unsealing end side of the second curved section 55 and extends in the tangential direction at the end section 5g of the second curved section 55.
By providing the second straight section 56, the tangent line of the inclined inner edge 50 is particularly near the terminal end 5h of the inclined inner edge 50, compared with the case where the arc of the second curved section 55 extends beyond the end portion 5g. An increase in the angle formed by the direction and the opening direction is avoided. As a result, when the packaging bag is opened from the opening start side seal portion 2 to the opening end side seal portion 4 through the storage portion 3, the broken pieces can be separated at a time without feeling caught.

以上、本発明の実施形態を説明したが、本発明は、上述した実施形態に限定されるものではなく、本発明の範囲で種々の変更実施が可能である。上述した実施形態では、ほぼ長方形の平面形状を有し、四方がヒートシールされた平パウチの包装袋の例を説明したが、本発明では、包装袋の形状はこれに限定されず、例えば、スタンディングパウチ、ガゼット付きパウチ、及び、折り返したフィルムの三方をシールした包装袋にも適用するができる。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. In the embodiment described above, an example of a flat pouch packaging bag having a substantially rectangular planar shape and heat-sealed on all sides has been described, but in the present invention, the shape of the packaging bag is not limited to this, for example, The present invention can also be applied to a packaging bag in which a standing pouch, a pouch with a gusset, and a folded film are sealed.

また、包装袋の外縁は、対称軸線１１に対して対称であってもよいし、非対称であってもよい。また、包装袋の両側の外縁は、互いに平行に配置されてもよいし、非平行に配置されてもよい。例えば、包装袋の両側の外縁が互いに非平行であって、包装袋の平面形状が台形である場合には、その台形の中心線が縦方向に延びる対称軸線１１となる。
なお、開封仮想直線１２は、通常、対称軸線１１と直交する。 Further, the outer edge of the packaging bag may be symmetric with respect to the symmetry axis 11 or may be asymmetric. Moreover, the outer edges on both sides of the packaging bag may be arranged in parallel to each other or non-parallel. For example, when the outer edges on both sides of the packaging bag are not parallel to each other and the planar shape of the packaging bag is a trapezoid, the center line of the trapezoid becomes the symmetry axis 11 extending in the vertical direction.
Note that the unsealed virtual straight line 12 is generally orthogonal to the symmetry axis 11.

また、上述した各実施形態では、傾斜内縁の直線区間を、曲線区間の端点の接線方向に延ばした例を説明したが、直線区間は、曲線区間の端点で、曲線区間に対して屈折して接続してもよい。 In each of the above-described embodiments, the example in which the straight section of the inclined inner edge extends in the tangential direction of the end point of the curved section has been described. However, the straight section is refracted with respect to the curved section at the end point of the curved section. You may connect.

また、上述した各実施形態では、傾斜内縁の開封終端側の端部付近を直線区間としたが、本発明では、その端部付近に、包装袋の収納部に向かって凸状に湾曲した曲線区間を設けてもよい。かかる曲線区間を設けることにより、傾斜内縁の開封終端側の端部での接線方向と開封方向との成す角度が小さくなり、開封時により容易に破断片を一気に切り離すことができる。 Moreover, in each embodiment mentioned above, although the edge part vicinity of the opening termination | terminus side of an inclination inner edge was made into the linear area, in this invention, the curve curved convexly toward the accommodating part of a packaging bag in the edge part vicinity. A section may be provided. By providing such a curved section, the angle formed between the tangential direction and the opening direction at the end of the inclined inner edge on the opening end side becomes small, and the broken fragments can be easily separated at the time of opening.

本発明に係る包装袋は、食品を収容するレトルトパウチのような包装袋の他、飲料及び医薬品を収容する各種包装袋にも適用することができる。 The packaging bag which concerns on this invention is applicable also to the various packaging bags which accommodate a drink and a pharmaceutical other than the packaging bag like a retort pouch which accommodates foodstuffs.

１包装袋
１ａ表フィルム
１ｂ裏フィルム
２開封始端側シール部
３収納部
４開封終端側シール部
５，５０傾斜内縁
５１，５３，５５曲線区間
５２、５４、５６直線区間
６トップシール部
６ａトップシール部の下縁
１０易開封部
１１対称軸線
１２開封仮想直線
１０ａ表フィルムの破断線（表破断線）
１０ｂ裏フィルムの破断線（裏破断線）
１０ｃ開封終端側シール部の破断線 DESCRIPTION OF SYMBOLS 1 Packaging bag 1a Front film 1b Back film 2 Unsealing start side seal part 3 Storage part 4 Unsealing end side seal part 5,50 Inclined inner edge 51,53,55 Curved section 52,54,56 Straight section 6 Top seal part 6a Top seal Lower edge 10 Easy opening part 11 Symmetrical axis 12 Open virtual straight line 10a Breaking line of table film (table breaking line)
10b Break line of back film (back break line)
10c Break line of the seal part at the end of opening

Claims

易開封部が形成された開封始端側シール部から収納部を通り開封終端側シール部まで開封される包装袋であって、
前記開封終端側シール部は、前記易開封部から開封方向に延びる開封仮想直線と斜めに交差する傾斜内縁を有し、
前記傾斜内縁は、前記包装袋の外縁に向かって凸状に湾曲した曲線区間と、前記曲線区間の開封終端側の端部に連続した直線区間とを有する
ことを特徴とする、包装袋。 A packaging bag that is opened from the opening start side seal portion where the easy opening portion is formed to the opening end side seal portion through the storage portion,
The unsealing end side seal part has an inclined inner edge that obliquely intersects with an unsealed virtual straight line extending in the opening direction from the easy-opening part,
The inclined bag has a curved section curved in a convex shape toward an outer edge of the packaging bag, and a straight section continuous to an end portion of the curved section on the unsealing end side.

前記易開封部と前記傾斜内縁の開封始端側の始端とを結ぶ直線と、前記始端における前記傾斜内縁の接線との成す角度が、０°〜６０°である
ことを特徴とする、請求項１記載の包装袋。 The angle formed by a straight line connecting the easy-opening portion and the start end of the inclined inner edge on the opening start end side and a tangent line of the inclined inner edge at the start end is 0 ° to 60 °. The packaging bag described.

前記曲線区間の少なくとも一部分は、前記開封仮想直線よりも上側に配置されている
ことを特徴とする、請求項１又は２記載の包装袋。 The packaging bag according to claim 1, wherein at least a part of the curved section is disposed above the opened virtual straight line.

前記開封仮想直線と、前記傾斜内縁の開封終端側の終端における前記傾斜内縁の接線との成す角度が、１０°〜５０°である
ことを特徴とする、請求項１〜３のいずれか一項に記載の包装袋。 The angle formed by the opening imaginary straight line and the tangent line of the inclined inner edge at the end of the inclined inner edge on the opening end side is 10 ° to 50 °. Packaging bag as described in.