JP3745142B2

JP3745142B2 - Bag with synthetic resin chuck

Info

Publication number: JP3745142B2
Application number: JP35475498A
Authority: JP
Inventors: 勝人高橋
Original assignee: Seisan Nipponsha KK
Current assignee: Seisan Nipponsha KK
Priority date: 1998-12-14
Filing date: 1998-12-14
Publication date: 2006-02-15
Anticipated expiration: 2018-12-14
Also published as: JP2000177751A

Description

【０００１】
【発明の属する技術分野】
本発明は、開口部に雌雄咬合型のチャックを備え、かつ両サイドにＶ字状に折り込んだ横ガゼットが接着された合成樹脂製チャック付の袋体に関するものである。
【０００２】
【従来の技術】
図１４で示すように、表裏２枚の胴部フィルムによって形成された袋体１の開口部２に沿ってチャック３が設けられ、フィルムをＶ字状に折り込んだ横ガゼット４を、前記折り込み稜線４ｂが袋体１の両サイド５の線と平行に袋体１の両サイド５に接着されている合成樹脂製チャック付の袋体は、例えば特開平５−９７１５１号で公知である。また、前記横ガゼット４の上端部をシールテープ６によって表裏２枚の胴部フィルムの何れか一方の内側面に寄せて接着した合成樹脂製チャック付の袋体も特開平８−３４４５０号で公知である。
【０００３】
【発明が解決しようとする課題】
上記公知の横ガゼットを有する合成樹脂製チャック付の袋体の製造に当たっては、収納物に応じて好ましいフィルム基材が選択使用されるが、その基材の構成や厚味、構成材料自体の層間接着強度等の要素によっては、袋体１に内容物を充填し脇襠部である横ガゼット４を図１５で示すように膨満展開したときの過剰な外力、過剰な充填、過激な輸送過程の扱い、又は落下等の不測な情況下では横ガゼット４と胴部フィルムの接着点に当たるＡ−Ｂ間の横ガゼット４の上端縁４ａに沿って破断を生じる場合がある。これはナイロンを基材としたものについては基材の強度上で問題は少ないが、二軸延伸ポリエステルフィルム、二軸延伸ポリプロピレンフィルム、ポリエチレン等々を基材としたもは前記破断が生じる可能性がある。
【０００４】
前記破断の要因は、内容物を充填したとき必然的に横ガゼット４が図１５で示すように膨満展開され、横ガゼット４の上部空間は横ガゼット４と胴部フィルムの接着点に当たるＡ，Ｂ点とサイド５のＣ１，Ｃ２点に支えられた三角錐形状となる。しかも、なおも展開しようとする外力が必要以上に作用するとＡ点に応力が集中し、Ａ点を起点にして横ガゼット４の上端縁４ａに沿ってＢ点方向へ破断伝播現象を生じるからである。
【０００５】
本発明の目的は、横ガゼットを備えた合成樹脂製チャック付の袋体において、横ガゼットの上端縁に沿った破断を防止したことである。
【０００６】
【課題を解決するための手段】
上記目的を達成するための本発明の構成は、請求項１に記載の通り、表裏２枚の胴部フィルムの両サイドにＶ字状に折り込んだ横ガゼットを接着し、開口部の内側に雌雄咬合型チャックを設けた合成樹脂製チャック付の袋体において、前記横ガゼットの上端縁の外側に、前記上端縁を底辺とし、この底辺と直角に交わり前記横ガゼットの上端縁の外側より前記袋体の開口部側に延びる横ガゼット外側延長線と、前記上端縁の内側とを結んだ傾斜線が角度の異なる複数の直線を有する凸状部を設け、この凸状部を有する横ガゼットを胴部フィルムに接着してなり、前記チャックと前記凸状部を有する横ガゼットの上端縁間は、表裏の胴部フィルム若しくは表裏何れか一方の胴部フィルムとシールテープとが、横ガゼットを挟まないで直接接着していることを特徴とするものである。
【０００７】
請求項２に記載の通り、裏２枚の胴部フィルムの両サイドにＶ字状に折り込んだ横ガゼットを接着し、開口部の内側に雌雄咬合型チャックを設けた合成樹脂製チャック付の袋体において、前記横ガゼットの上端縁の外側に、前記上端縁を底辺とし、この底辺と直角に交わり前記横ガゼットの上端縁の外側より前記袋体の開口部側に延びる横ガゼット外側延長線と、前記上端縁の内側とを結んだ傾斜線が直線と曲線の組み合わせを有する凸状部を設け、この凸状部を有する横ガゼットを胴部フィルムに接着してなり、前記チャックと前記凸状部を有する横ガゼットの上端縁間は、表裏の胴部フィルム若しくは表裏何れか一方の胴部フィルムとシールテープとが、横ガゼットを挟まないで直接接着していることを特徴とするものである。
【０００８】
請求項３に記載の通り、表裏２枚の胴部フィルムの両サイドにＶ字状に折り込んだ横ガゼットを接着し、開口部の内側に雌雄咬合型チャックを設けた合成樹脂製チャック付の袋体において、前記横ガゼットの上端縁の外側に、前記上端縁を底辺とし、この底辺と直角に交わり前記横ガゼットの上端縁の外側より前記袋体の開口部側に延びる横ガゼット外側延長線と、前記上端縁の内側とを結んだ傾斜線が直線と直線とをつなぐ曲線の組み合わせを有する凸状部を設け、この凸状部を有する横ガゼットを胴部フィルムに接着してなり、前記チャックと前記凸状部を有する横ガゼットの上端縁間は、表裏の胴部フィルム若しくは表裏何れか一方の胴部フィルムとシールテープとが、横ガゼットを挟まないで直接接着していることを特徴とするものである。
【０００９】
請求項４に記載の通り、表裏２枚の胴部フィルムの両サイドにＶ字状に折り込んだ横ガゼットを接着し、開口部の内側に雌雄咬合型チャックを設けた合成樹脂製チャック付の袋体において、前記横ガゼットの上端縁の外側に、前記上端縁を底辺とし、この底辺と直角に交わり前記横ガゼットの上端縁の外側より前記袋体の開口部側に延びる横ガゼット外側延長線と、前記上端縁の内側とを結んだ傾斜線が曲線を有する凸状部を設け、この凸状部を有する横ガゼットを胴部フィルムに接着してなり、前記チャックと前記凸状部を有する横ガゼットの上端縁間は、表裏の胴部フィルム若しくは表裏何れか一方の胴部フィルムとシールテープとが、横ガゼットを挟まないで直接接着していることを特徴とするものである。
【００１０】
請求項５に記載の通り、表裏２枚の胴部フィルムの両サイドにＶ字状に折り込んだ横ガゼットを接着し、開口部の内側に雌雄咬合型チャックを設けた合成樹脂製チャック付の袋体において、前記横ガゼットの上端縁の外側に、前記上端縁を底辺とし、この底辺と直角に交わり前記横ガゼットの上端縁の外側より前記袋体の開口部側に延びる横ガゼット外側延長線と、前記上端縁の内側とを結んだ傾斜線と横ガゼット上端縁とが曲線で接続した凸状部を設け、この凸状部を有する横ガゼットを胴部フィルムに接着してなり、前記チャックと前記凸状部を有する横ガゼットの上端縁間は、表裏の胴部フィルム若しくは表裏何れか一方の胴部フィルムとシールテープとが、横ガゼットを挟まないで直接接着していることを特徴とするものである。
【００１１】
請求項６に記載の通り、表裏２枚の胴部フィルムの両サイドにＶ字状に折り込んだ横ガゼットを接着し、開口部の内側に雌雄咬合型チャックを設けた合成樹脂製チャック付の袋体において、前記横ガゼットの上端縁の外側に、前記上端縁を底辺とし、この底辺と直角に交わり前記横ガゼットの上端縁の外側より前記袋体の開口部側に延びる横ガゼット外側延長線と、前記上端縁の内側とを結んだ傾斜線が、この傾斜線の上下端を最短距離で結ぶ仮想直線より下方に位置している凸状部を設け、この凸状部を有する横ガゼットを胴部フィルムに接着してなり、前記チャックと前記凸状部を有する横ガゼットの上端縁間は、表裏の胴部フィルム若しくは表裏何れか一方の胴部フィルムとシールテープとが、横ガゼットを挟まないで直接接着していることを特徴とするものである。
【００１２】
【発明の実施の形態】
以下本発明の実施例を図面に基づいて説明する。図１において、１は表裏２枚の胴部フィルムによって形成される袋体である。３は前記袋体１の開口部２に沿って設けられているチャックであり、袋体１の両側にはフィルムをＶ字状に折り込んだ横ガゼット４を、前記折り込み稜線４ｂが袋体１の両サイド５の線と平行に袋体１の両サイド５に接着されている。また、前記横ガゼット４の上端部をシールテープ６によって表裏２枚の胴部フィルムの何れか一方の内側面に寄せて接着している。
【００１７】
前記横ガゼット４の上端縁４ａの外側（両サイド５側）に、前記上端縁４ａを底辺とし、この底辺と直角に交わり前記横ガゼット４の上端縁４ａの外側より前記袋体１の開口部２側に延びる横ガゼット外側延長線４ｃ（Ｄ）と、前記上端縁４ａの内側端（Ｂ）或いは内側中間（Ｂ２）とを結んだ傾斜線を有する凸状部７を設け、この凸状部７を有する横ガゼット４を胴部フィルムに接着した構成である。
【００１８】
そこで本発明は上記のような合成樹脂製チャック付の袋体において、前記凸状部７の傾斜線は各種の形態である。すなわち、図４で示すように、傾斜角度が異なる二本の複数の直線８ａ，８ｂによるもの（実施例１）、図５で示すように、傾斜角度が異なる三本の複数の直線８ａ，８ｂ，８ｃによるもの（実施例２）、図６で示すように、直線８ｂと曲線９の組み合わせによるもの（実施例３）、図７で示すように、直線８ａと曲線９により横ガゼット４の上端縁４ａの中間Ｂ２に及ぶもの（実施例４）、図８で示すように、直線８ａと直線８ｂとをつなぐ曲線９の組み合わせ（実施例５）である。
【００１９】
さらに、図９及び図１０で示すように、曲線９によるもの（実施例６）、図１２で示すように、０１を中心とする半径Ｒ１の曲線９ａと０２を中心とする半径Ｒ２の曲線９ｂとによる曲率が異なる複合曲線によるもの（実施例７）、図１３で示すように、曲線９により横ガゼット４の上端縁４ａの中間Ｂ２に及ぶもの（実施例８）である。
【００２０】
このような傾斜線は実施例４と実施例８に見られるような横ガゼット上端縁の外側端と内側端の中間（Ｂ２）に及ぶものであっても、或いはその他の実施例のように横ガゼット上端縁の内側端（Ｂ）に及ぶものであっても良い。
【００２１】
そして、これら実施例１〜８の何れの傾斜線においても、この傾斜線の上下端（Ｄ）−（Ｂ）或いは（Ｄ）−（Ｂ２）を最短距離で結ぶ仮想直線より下方に位置させたことである。
【００２２】
本発明は上記の通りの構成であるから、袋体１内に内容物を充填したとき必然的に横ガゼット４が図３及び図１１で示すように膨満展開され、横ガゼット４の上部空間は凸状部７の傾斜線と横ガゼット外側延長線４ｃとが交わるＤ点、上端縁４ａの内側端のＢ点或いは内側中間のＢ２点、及びサイド５のＣ１，Ｃ２点によって支えられる。
【００２３】
そして、図２及び図１０で示すように、膨満展開する作用のための過剰な外力Ｆが従来構造のＡ点に相当する部位に加わったとき、その応力は凸状部７のＤ−Ｂ点間或いはＤ−Ｂ２点間の傾斜線上に向かって分散する。この応力分散作用により横ガゼット４の上端縁４ａに沿ってＢ点方向に破断する応力集中を緩和するのである。この応力集中の緩和は前記実施例１〜９の全ての傾斜線形態で有効に得られる。
【００２４】
すなわち、実施例１〜８に関し、凸状部７の傾斜線が横ガゼット４の全幅に渡って形成される実施例においても、或いはこの傾斜線が横ガゼット４の上端縁の外側端と内側端の中間に及ぶ実施例においても、凸状部７のＤ−Ｂ点或いはＤ−Ｂ２点間の傾斜線上に向かって分散する応力分散範囲が大きく得られる。
【００２５】
そして後者（Ｄ−Ｂ２）の場合、前者（Ｄ−Ｂ）と比較すると分散範囲は狭くなってしまうものの、横ガゼット４の外側から内側にかけてのポイントとなる部分で確実に応力分散されるため、可及的に満足しうる効果を得ることが出来る。
【００２６】
また特に、傾斜角度が異なる二本の複数の直線８ａ，８ｂによるもの（実施例１）、傾斜角度が異なる三本の複数の直線８ａ，８ｂ，８ｃによるもの（実施例２）、直線８ｂと曲線９の組み合わせによるもの（実施例３）、直線８ａと曲線９により横ガゼット４の上端縁４ａの中間Ｂ２に及ぶもの（実施例４）、直線８ａと直線８ｂとをつなぐ曲線９の組み合わせ（実施例５）、また、曲線９によるもの（実施例６）、０１を中心とする半径Ｒ１の曲線９ａと０２を中心とする半径Ｒ２の曲線９ｂとによる曲率が異なる複合曲線によるもの（実施例７）、曲線９により横ガゼット４の上端縁４ａの中間Ｂ２に及ぶもの（実施例８）は凸状部７のＤ−Ｂ点間或いはＤ−Ｂ２点間の実質的な傾斜線長さは前記凸状部７のＤ−Ｂ点間或いはＤ−Ｂ２点間の仮想直線よりも長く、従って応力分散範囲が大きく得られるのである。
【００２７】
加えて、前記実施例１〜実施例８の各実施例において、凸状部７の傾斜線が、この傾斜線の上下端を最短距離で結ぶ仮想直線より下方に位置するようにしたことにより、この上下端に対しての負担を少なくし、前記下方に位置する傾斜先部分により積極的に荷重を分散しつつ受け止めるものである。
【００２８】
従って、横ガゼット４が膨満展開したときの過剰な外力、過剰な充填、過激な輸送過程の扱い、又は落下等で横ガゼット４の上端縁４ａに沿ってＢ点方向への破断伝播現象を解消し見栄えの良い形態を保持するものである。
【００２９】
尚、上記実施形態は、横ガゼット４の上端部をシールテープ６によって表裏２枚の胴部フィルムの何れか一方の内側面に寄せて接着した袋体に本発明を適用した例であるが、シールテープ６を用いていない袋体、或いは横ガゼット４の上端部をチャック付きシールテープにより表裏２枚の胴部フィルムの何れか一方の内側面に寄せて接着した袋体にも本発明は適用される。また、傾斜線の直線の傾斜角度及び曲線の曲率は必要に応じて任意に設定される。
【００３０】
【発明の効果】
以上のように本発明によると、横ガゼットの上端縁の外側に、前記上端縁を底辺とし、この底辺と直角に交わり前記横ガゼットの上端縁の外側より前記袋体の開口部側に延びる横ガゼット外側延長線と、前記上端縁の内側とを結んだ傾斜線を有する凸状部を設け、この凸状部を有する横ガゼットを胴部フィルムに接着した構成であるから、横ガゼットが膨満展開する作用のための過剰な外力を傾斜線が長く、応力分散範囲が大きな凸状部よって応力を広く分散して横ガゼットの上端縁に沿って破断する応力集中を緩和し、横ガゼットの上端縁に沿う破断伝播を防止し、見栄えの良い品質良好な両サイドに横ガゼットを備えた合成樹脂製チャック付の袋体を提供することができる。
【図面の簡単な説明】
【図１】本発明袋体の要部の正面図
【図２】本発明袋体の横ガゼットが膨満展開して外力が作用したときの説明図
【図３】本発明袋体の横ガゼットが膨満展開したときの横ガゼットの上部空間の支点を示す斜視図
【図４】凸状部の傾斜線の形態を示す要部正面図
【図５】凸状部の傾斜線の形態を示す要部正面図
【図６】凸状部の傾斜線の形態を示す要部正面図
【図７】凸状部の傾斜線の形態を示す要部正面図
【図８】凸状部の傾斜線の形態を示す要部正面図
【図９】本発明袋体の要部の正面図
【図１０】本発明袋体の横ガゼットが膨満展開して外力が作用したときの説明図
【図１１】本発明袋体の横ガゼットが膨満展開したときの横ガゼットの上部空間の支点を示す斜視図
【図１２】凸状部の傾斜線の形態を示す要部正面図
【図１３】凸状部の傾斜線の形態を示す要部正面図
【図１４】従来の袋体の一例を示す要部の正面図
【図１５】従来の袋体の横ガゼットが膨満展開したときの横ガゼットの上部空間の支点を示す斜視図
【符号の説明】
１袋体
２開口部
３チャック
４横ガゼット
４ａ横ガゼットの上端縁
４ｂ横ガゼットの稜線
４ｃ横ガゼット外側延長線
５サイド
６シールテープ
７凸状部
８直線
８ａ直線
８ｂ直線
８ｃ直線
９曲線
９ａ曲線
９ｂ曲線[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bag body with a synthetic resin chuck, in which a male and female bite type chuck is provided in an opening, and a lateral gusset folded in a V shape is bonded to both sides.
[0002]
[Prior art]
As shown in FIG. 14, a chuck 3 is provided along the opening 2 of the bag body 1 formed by two front and back body film, and the lateral gusset 4 obtained by folding the film into a V shape is used as the folding ridgeline. A bag body with a synthetic resin chuck, in which 4b is bonded to both sides 5 of the bag body 1 in parallel with the lines on both sides 5 of the bag body 1, is known, for example, in Japanese Patent Laid-Open No. 5-97151. Further, a bag body with a synthetic resin chuck in which the upper end portion of the horizontal gusset 4 is brought close to the inner surface of one of the two front and back body films with a sealing tape 6 is also known from Japanese Patent Application Laid-Open No. 8-34450. It is.
[0003]
[Problems to be solved by the invention]
In the production of the synthetic resin zippered bag body having the above-mentioned known lateral gusset, a preferable film base material is selected and used according to the contents to be stored. Depending on factors such as adhesive strength, excessive external force, excessive filling, and extreme transportation process when the bag 1 is filled with the contents and the side gusset 4 is expanded as shown in FIG. Under unforeseen circumstances such as handling or dropping, a break may occur along the upper end edge 4a of the lateral gusset 4 between A and B, which is the adhesion point between the lateral gusset 4 and the body film. This is because there is little problem in the strength of the base material for the material based on nylon, but the above-mentioned breakage may occur if the base material is a biaxially stretched polyester film, a biaxially stretched polypropylene film, polyethylene or the like. is there.
[0004]
The cause of the breakage is that when the contents are filled, the lateral gusset 4 inevitably expands as shown in FIG. 15, and the upper space of the lateral gusset 4 corresponds to the bonding point between the lateral gusset 4 and the body film A, B It becomes a triangular pyramid shape supported by points C1 and C2 points on the side 5. Moreover, if the external force to be developed still acts more than necessary, the stress is concentrated at the point A, and the fracture propagation phenomenon occurs in the direction of the point B along the upper edge 4a of the lateral gusset 4 starting from the point A. is there.
[0005]
The object of the present invention is to prevent breakage along the upper edge of the horizontal gusset in the bag body with a synthetic resin chuck provided with the horizontal gusset.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a lateral gusset folded in a V-shape is bonded to both sides of two body film , front and back, and the male and female are inside the opening. In a bag with a synthetic resin chuck provided with an occlusal chuck, the bag is formed on the outer side of the upper edge of the horizontal gusset, with the upper edge as a base, and intersects at right angles to the base and from the outer side of the upper edge of the horizontal gusset. Provided with a convex portion having a plurality of straight lines with different inclination angles connecting the outer extension line of the horizontal gusset extending toward the opening side of the body and the inner side of the upper end edge, the horizontal gusset having the convex portion Adhering to the part film, between the upper edge of the chuck and the convex gusset, the front and back body film or the front and back body film and the sealing tape do not sandwich the side gusset Glue directly on It is characterized in that there.
[0007]
A bag with a synthetic resin chuck, wherein a lateral gusset folded in a V-shape is bonded to both sides of the two back body films and a male and female bite type chuck is provided inside the opening. In the body, outside the upper edge of the lateral gusset, the lateral edge of the lateral gusset extends from the outer side of the upper edge of the lateral gusset to the opening side of the lateral body, with the upper edge as the bottom and intersecting at right angles to the bottom. In addition, an inclined line connecting the inside of the upper edge is provided with a convex portion having a combination of a straight line and a curved line, and a lateral gusset having the convex portion is adhered to a body film, and the chuck and the convex shape Between the upper edge of the horizontal gusset having a portion, the front and back body film or the front and back body film and the sealing tape are directly bonded without sandwiching the horizontal gusset. .
[0008]
A bag with a synthetic resin chuck, wherein a lateral gusset folded in a V-shape is bonded to both sides of two body film on the front and back sides, and a male and female bite type chuck is provided inside the opening. In the body, outside the upper edge of the lateral gusset, the lateral edge of the lateral gusset extends from the outer side of the upper edge of the lateral gusset to the opening side of the lateral body, with the upper edge as the bottom and intersecting at right angles to the bottom. A convex portion having a combination of curves in which an inclined line connecting the inside of the upper edge is connected to a straight line, and a lateral gusset having the convex portion is adhered to a body film, and the chuck And between the upper edge of the horizontal gusset having the convex portion, the front and back body films or the front and back body films and the sealing tape are directly bonded without sandwiching the horizontal gusset. those that A.
[0009]
5. A bag with a synthetic resin chuck, wherein a lateral gusset folded in a V-shape is bonded to both sides of two body film , front and back, and a male and female bite type chuck is provided inside the opening. In the body, outside the upper edge of the lateral gusset, the lateral edge of the lateral gusset extends from the outer side of the upper edge of the lateral gusset to the opening side of the lateral body, with the upper edge as the bottom and intersecting at right angles to the bottom. A convex portion having a curved line connecting the inside of the upper edge is provided, and a lateral gusset having the convex portion is adhered to a body film, and the lateral surface having the chuck and the convex portion is formed. Between the upper edge of the gusset, either the front or back body film or the front or back body film and the sealing tape are directly bonded without sandwiching the lateral gusset .
[0010]
6. A bag with a synthetic resin chuck in which a lateral gusset folded in a V-shape is bonded to both sides of two body film, front and back, and a male and female bite chuck is provided inside the opening. In the body, outside the upper edge of the lateral gusset, the lateral edge of the lateral gusset extends from the outer side of the upper edge of the lateral gusset to the opening side of the lateral body, with the upper edge as the bottom and intersecting at right angles to the bottom. A convex portion in which an inclined line connecting the inner side of the upper end edge and a lateral gusset upper end edge are connected by a curve, and the lateral gusset having the convex portion is adhered to a body film, and the chuck Between the upper edge of the horizontal gusset having the convex portion, the front and back body film or the front and back body film and the sealing tape are directly bonded without sandwiching the horizontal gusset. Is.
[0011]
A bag with a synthetic resin chuck, wherein a lateral gusset folded in a V-shape is bonded to both sides of the two body film on the front and back sides, and a male and female bite type chuck is provided inside the opening. In the body, outside the upper edge of the lateral gusset, the lateral edge of the lateral gusset extends from the outer side of the upper edge of the lateral gusset to the opening side of the lateral body, with the upper edge as the bottom and intersecting at right angles to the bottom. An inclined line connecting the inside of the upper end edge is provided with a convex portion located below a virtual straight line connecting the upper and lower ends of the inclined line with the shortest distance, and a horizontal gusset having the convex portion is Adhering to the part film, between the upper edge of the chuck and the convex gusset, the front and back body film or the front and back body film and the sealing tape do not sandwich the side gusset Glued directly on It is characterized in.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a bag formed by two front and back body film. Reference numeral 3 denotes a chuck provided along the opening 2 of the bag body 1, a lateral gusset 4 in which a film is folded in a V shape is formed on both sides of the bag body 1, and the folding ridge line 4 b is formed on the bag body 1. It is bonded to both sides 5 of the bag body 1 in parallel with the lines on both sides 5. Further, the upper end portion of the lateral gusset 4 is brought close to and adhered to one of the inner side surfaces of the front and back body film by the seal tape 6.
[0017]
The upper edge 4a of the lateral gusset 4 is outside (on both sides 5) the upper edge 4a as a bottom, and intersects at right angles to the bottom of the lateral gusset 4 from the outside of the upper edge 4a. A convex portion 7 having an inclined line connecting the lateral gusset outer extension line 4c (D) extending to the two sides and the inner end (B) or inner middle (B2) of the upper end edge 4a is provided, and this convex portion The horizontal gusset 4 having 7 is bonded to the body film.
[0018]
Therefore, according to the present invention, in the bag with a synthetic resin chuck as described above, the inclined line of the convex portion 7 has various forms. That is, as shown in FIG. 4, two straight lines 8a and 8b having different inclination angles (Example 1) , as shown in FIG. 5, three straight lines 8a and 8b having different inclination angles. 8c (Embodiment 2) , as shown in FIG. 6, as a combination of a straight line 8b and a curve 9 (Embodiment 3) , and as shown in FIG. 7, the upper end of the horizontal gusset 4 by the straight line 8a and the curve 9 As shown in FIG. 8, the combination extending over the middle B2 of the edge 4a (Embodiment 4) is a combination of the curves 9 connecting the straight lines 8a and 8b (Embodiment 5) .
[0019]
Further, as shown in FIG. 9 and FIG. 10, the curve 9 is based on the curve 9 (Example 6) . As shown in FIG. 12, the curve 9a having the radius R1 centered on 01 and the curve 9b having the radius R2 centered on 02 are shown. According to a compound curve having different curvatures according to (Example 7) , as shown in FIG. 13, the curve 9 extends to the middle B2 of the upper edge 4a of the horizontal gusset 4 (Example 8) .
[0020]
Such an inclined line may extend to the middle (B2) between the outer edge and the inner edge of the upper edge of the lateral gusset as seen in the fourth and eighth embodiments , or as in the other embodiments. It may extend to the inner end (B) of the upper edge of the gusset.
[0021]
And in any inclination line of these Examples 1-8 , it was located below the virtual straight line which connects the upper and lower ends (D)-(B) or (D)-(B2) of this inclination line with the shortest distance. That is.
[0022]
Since the present invention is configured as described above, the lateral gusset 4 is inevitably expanded as shown in FIGS. 3 and 11 when the bag 1 is filled with the contents, and the upper space of the lateral gusset 4 is It is supported by the point D where the inclined line of the convex portion 7 and the lateral gusset outer extension line 4c intersect, the point B at the inner end of the upper end edge 4a or the point B2 at the inner middle, and the points C1 and C2 on the side 5.
[0023]
As shown in FIGS. 2 and 10, when an excessive external force F for expanding and expanding is applied to a portion corresponding to the point A of the conventional structure, the stress is a point D-B of the convex portion 7. Disperse toward the slope line between the two points or between the points D-B. This stress dispersion action relieves stress concentration that breaks in the direction of point B along the upper edge 4a of the lateral gusset 4. This relaxation of stress concentration can be effectively obtained in all the inclined line forms of Examples 1 to 9.
[0024]
That is, with respect to Examples 1 to 8 , in the example in which the inclined line of the convex portion 7 is formed over the entire width of the horizontal gusset 4, or this inclined line is the outer end and inner end of the upper end edge of the horizontal gusset 4. Even in the embodiment extending in the middle of the above, a large stress dispersion range is obtained which is distributed toward the slope line between the points D-B or D-B2 of the convex portion 7.
[0025]
And in the case of the latter (D-B2), although the dispersion range becomes narrower than that of the former (D-B), the stress is surely distributed at the portion that becomes the point from the outside to the inside of the lateral gusset 4, The effect which can be satisfied as much as possible can be obtained.
[0026]
Further, in particular, two straight lines 8a and 8b having different inclination angles (Example 1) , three straight lines 8a, 8b and 8c having different inclination angles (Example 2) , straight line 8b, by the combination of curve 9 (example 3), intended to cover intermediate B2 of the upper edge 4a of the lateral gusset 4 by a straight line 8a and the curve 9 (example 4), a combination of a curve 9 which connects the straight line 8a and the straight line 8b ( Example 5) , according to the curve 9 (Example 6) , or according to a compound curve having different curvatures of the curve 9a having the radius R1 centered at 01 and the curve 9b having the radius R2 centered at 02 (Example) 7) In the case where the curve 9 extends to the middle B2 of the upper edge 4a of the lateral gusset 4 (Embodiment 8) , the substantial inclination line length between points D-B or points D-B2 of the convex portion 7 is as follows. Between points D-B of the convex part 7 or D- It is longer than the imaginary straight line between the points B2, so that a large stress dispersion range is obtained.
[0027]
In addition, in each of the first to eighth embodiments, the inclined line of the convex portion 7 is positioned below the imaginary straight line connecting the upper and lower ends of the inclined line with the shortest distance. The burden on the upper and lower ends is reduced, and the load is positively distributed and received by the inclined tip portion located below.
[0028]
Therefore, excessive external force when the lateral gusset 4 is fully expanded, excessive filling, handling of an extreme transportation process, or dropping, etc., eliminates the fracture propagation phenomenon in the B point direction along the upper edge 4a of the lateral gusset 4 It retains a good-looking form.
[0029]
In addition, although the said embodiment is an example which applied this invention to the bag body which brought the upper end part of the horizontal gusset 4 near the inner surface of either one of the body film of 2 sheets of front and back by the sealing tape 6, The present invention is also applied to a bag body in which the seal tape 6 is not used, or a bag body in which the upper end portion of the lateral gusset 4 is brought close to the inner side surface of one of the two body films of the front and back surfaces by a seal tape with a chuck Is done. Further, the inclination angle of the straight line of the inclination line and the curvature of the curve are arbitrarily set as required.
[0030]
【The invention's effect】
As described above, according to the present invention, outside the upper edge of the horizontal gusset, the upper edge is the bottom, and intersects at right angles to the bottom and extends from the outside of the upper edge of the horizontal gusset to the opening side of the bag body. A convex part having an inclined line connecting the outer extension line of the gusset and the inner side of the upper end edge is provided, and the lateral gusset is inflated because the lateral gusset having the convex part is bonded to the body film. Excessive external force due to the action of the projecting part with a long slope line and a large stress dispersion range, the stress is widely dispersed and the stress concentration that breaks along the upper edge of the lateral gusset is reduced, and the upper edge of the lateral gusset It is possible to provide a bag body with a zipper made of synthetic resin, which is provided with lateral gussets on both sides, which prevents the propagation of breaks along the sides and has good appearance and good quality.
[Brief description of the drawings]
FIG. 1 is a front view of the main part of the bag of the present invention. FIG. 2 is an explanatory diagram when the lateral gusset of the bag of the present invention is fully expanded and an external force is applied. FIG. 4 is a perspective view showing the fulcrum of the upper space of the horizontal gusset when fully expanded. FIG. 4 is a front view of the main part showing the form of the inclined line of the convex part. FIG. 5 is the main part showing the form of the inclined line of the convex part. Front view [Fig. 6] Front view of main part showing form of slope line of convex part [Fig. 7] Front view of main part showing form of slope line of convex part [Figure 8] Form of slope line of convex part FIG. 9 is a front view of the main part of the bag body of the present invention. FIG. 10 is an explanatory diagram when the lateral gusset of the bag body of the present invention is expanded and an external force is applied. FIG. 12 is a perspective view showing the fulcrum of the upper space of the horizontal gusset when the lateral gusset of the bag is inflated. FIG. 12 is a front view of the main part showing the form of the inclined line of the convex portion. FIG. 14 is a front view of the main part showing an example of a conventional bag body. FIG. 15 is a top view of the upper space of the horizontal gusset when the horizontal gusset of the conventional bag is fully expanded. Perspective view showing the fulcrum
DESCRIPTION OF SYMBOLS 1 Bag body 2 Opening part 3 Chuck 4 Horizontal gusset 4a Upper edge 4b of horizontal gusset Edge 4c of horizontal gusset Horizontal gusset outer extension line 5 Side 6 Seal tape 7 Convex part 8 Straight line 8b Straight line 8c Straight line 9 Curve 9a Curve 9b curve

Claims

In a bag with a synthetic resin zipper, in which a lateral gusset folded in a V-shape is bonded to both sides of the front and back body film, and a male and female bite type chuck is provided inside the opening, the upper end of the horizontal gusset A lateral gusset outer extension line extending from the outer side of the upper end edge of the horizontal gusset to the opening side of the bag body, and the inner side of the upper end edge. Provided with a convex portion having a plurality of straight lines with different angles, and an upper end of the horizontal gusset having the chuck and the convex portion. A bag body with a synthetic resin chuck, characterized in that, between the edges, either the front or back body film or the front and back body film and the sealing tape are directly bonded without interposing a lateral gusset .

In a bag with a synthetic resin zipper, in which a lateral gusset folded in a V-shape is bonded to both sides of the front and back body film, and a male and female bite type chuck is provided inside the opening, the upper end of the horizontal gusset A lateral gusset outer extension line extending from the outer side of the upper end edge of the horizontal gusset to the opening side of the bag body, and the inner side of the upper end edge. An upper end edge of the lateral gusset having the convex portion having a convex portion having a combination of a straight line and a curved line, and a lateral gusset having the convex portion adhered to the body film. A synthetic resin-made zippered bag, wherein the front and back body films or the front and back body film and the sealing tape are directly bonded to each other without sandwiching a lateral gusset.

In a bag with a synthetic resin zipper, in which a lateral gusset folded in a V-shape is bonded to both sides of the front and back body film, and a male and female bite type chuck is provided inside the opening, the upper end of the horizontal gusset A lateral gusset outer extension line extending from the outer side of the upper end edge of the horizontal gusset to the opening side of the bag body, and the inner side of the upper end edge. A convex part having a combination of curved lines connecting the straight lines to each other is provided, and a lateral gusset having the convex part is adhered to a body film, and the lateral part having the chuck and the convex part is formed. Between the upper edge of the gusset, a bag with a synthetic resin chuck characterized in that either the front or back body film or the front and back body film and the sealing tape are directly bonded without sandwiching the lateral gusset body

In a bag with a synthetic resin zipper, in which a lateral gusset folded in a V-shape is bonded to both sides of the front and back body film, and a male and female bite type chuck is provided inside the opening, the upper end of the horizontal gusset A lateral gusset outer extension line extending from the outer side of the upper end edge of the horizontal gusset to the opening side of the bag body, and the inner side of the upper end edge. Provided with a convex portion having a curved curved line, the horizontal gusset having the convex portion is adhered to the body film, and the upper and lower edges of the horizontal gusset having the convex portion and the chuck are A bag body with a synthetic resin chuck, wherein the body film or the body film of either of the front and back surfaces and the sealing tape are directly bonded without sandwiching a lateral gusset.

In a bag with a synthetic resin zipper, in which a lateral gusset folded in a V-shape is bonded to both sides of the front and back body film, and a male and female bite type chuck is provided inside the opening, the upper end of the horizontal gusset A lateral gusset outer extension line extending from the outer side of the upper end edge of the horizontal gusset to the opening side of the bag body, and the inner side of the upper end edge. Provided with a convex portion in which the connected inclined line and the upper edge of the horizontal gusset are connected by a curve, the horizontal gusset having the convex portion is bonded to the body film, and the horizontal gusset having the chuck and the convex portion A bag with a synthetic resin zipper, characterized in that between the upper edge of the body, either the front or back body film or the front and back body film and the sealing tape are directly bonded without sandwiching the lateral gusset .

In a bag with a synthetic resin zipper, in which a lateral gusset folded in a V-shape is bonded to both sides of the front and back body film, and a male and female bite type chuck is provided inside the opening, the upper end of the horizontal gusset A lateral gusset outer extension line extending from the outer side of the upper end edge of the horizontal gusset to the opening side of the bag body, and the inner side of the upper end edge. The connected inclined line is provided with a convex part located below the virtual straight line connecting the upper and lower ends of this inclined line with the shortest distance, and a lateral gusset having this convex part is adhered to the trunk film, Between the upper edge of the lateral gusset having the chuck and the convex portion, either the front or back body film or the front or back body film and the sealing tape are directly bonded without sandwiching the lateral gusset. Characteristic composition Bag body with fat-made chuck.