JP4544560B2 - Manufacturing method of bag-like container - Google Patents

Manufacturing method of bag-like container Download PDF

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JP4544560B2
JP4544560B2 JP2001051220A JP2001051220A JP4544560B2 JP 4544560 B2 JP4544560 B2 JP 4544560B2 JP 2001051220 A JP2001051220 A JP 2001051220A JP 2001051220 A JP2001051220 A JP 2001051220A JP 4544560 B2 JP4544560 B2 JP 4544560B2
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pair
bag
portions
bottom wall
wall portion
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彰雄 福原
崇 君塚
佳恭 臼杵
義夫 野田
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Daiwa Can Co Ltd
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Description

【０００１】
【発明の属する技術分野】
本発明は、スポーツドリンクやジュースのような液体飲料を充填するための自立性袋状容器の製造方法に関するもので、特に、オートメーションによって効率良く製造が可能な袋状容器の製造方法に関する。
【０００２】
【従来の技術】
袋状容器の前面と後面を構成する一対の平面部と、この平面部の間に内側に折畳まれて接着された一対の側壁部と、この平面部と側壁部との一端を覆うように接着された底部形成シートを備えた袋状容器は、側壁部を備えることによって、側壁部を設けていない袋状容器よりも容積を大きくすることができると共に、内容物を詰めたときに全体的な形状が角張り、袋状容器を箱詰めする際に各容器間の隙間を少なくすることができる。
【０００３】
上記のような側壁部を備えた袋状容器とその製造方法が、特開平５−２２１４５１号公報に開示されており、その袋状容器は、内容物を充填すると、底部の熱シール部と底部形成シートが水平になって、自立安定性に優れている。
【０００４】
上記の袋状容器は、自立安定性に優れているが、袋状容器を手で持上げたときに、底壁部が水平面であるので、内容物の重量を底壁部と水平な底部熱シール部とで支えることとなり、底壁部が下方に撓み易く、底部の保形性に問題があり、このことは、袋状容器を薄い材料で製造する上で障害となる。
また、その製造方法は、接着された平面部と側壁部とのシール部に切込みを入れる工程と、切込みを入れた側壁部を外方に折拡げる工程とを必要とするので手間がかかる。
【０００５】
そこで、本出願人は、薄い材料を使用して保形性及び自立安定性の良い袋状容器を、自動化した工程で製造することができる製造方法の発明について特許出願（特願２０００−１２８６２０）した。
この先願の発明は、一対の平面部と該平面部の中間に位置する底壁部とを構成する一体の帯状多層ラミネートシートの前記底壁部を構成する部位に、前記一対の平面部と底壁部を区画する横方向に横断する一対の折り癖と、該一対の折り癖によって区画された底壁部を横方向に二等分する折り癖と、該折り癖上の一点と前記平面部と底壁部を区画する横方向に横断する一対の折り癖の各側縁端部とを結ぶ折り癖を底壁部の横方向に対称に形成する工程と、前記底壁部を横方向に二等分する折り癖に沿って底壁部の外面側を合掌させて二つ折すると共に、両側縁部の内面側を合掌させて折り畳む工程と、前記折畳んだ底壁部を覆うように前記一対の平面部を折り癖に沿って折り重ねる工程と、縦長に二つ折りにした各側壁部を、その折り目を向かい合わせて前記折り重ねた平面部と底壁部の合掌部に両側から挟み込む工程と、前記各側壁部と各平面部及び底壁部の折り重ねた側縁部を熱接着させて平面部と同一方向に延在する熱接着部を側縁に形成する工程とからなる袋状容器の製造方法である。
【０００６】
【発明が解決しようとする課題】
上記先願発明の製造方法では、底壁部を山形に折り畳む際に、斜めの稜線を形成するため予め折り癖を付ける必要がある。このことは、製造工程を自動化する上で余分な手間を要することとなる。
本発明は、薄い材料シートに予め折り癖を付けなくても袋状に折り畳むことができ、自動化した工程で保形性が良く、自立安定性も良い袋状容器を、簡易に製造することができる製造方法を提供することを目的とする。
【０００７】
【課題を解決するための手段】
本発明は、袋状容器の前面と後面を構成する一対の平面部と、該平面部間に内側に二つ折りして接着される一対の側壁部と、前記平面部と側壁部との一端を覆う底壁部とを、多層ラミネートシートで形成する袋状容器の製造方法において、
少なくとも一対の平面部とその中間に位置する底壁部とを構成する一体のシートを形成し、このシートの底壁部を、前記一対の平面部と底壁部との境界に沿って横方向に横断する一直線の一対の谷折り線と、該一対の谷折り線によって区画される底壁部をその横方向中央線と前記一対の谷折り線間を区分する二本の一直線の横方向山折り線とでパンタグラフ状の側面形状に折り畳み、次いで、縦長に二つ折りした一対の側壁部を、山折り線側側が互いに向かい合うように折り畳んだ底壁部と一対の平面部の側部にかけて内側に設置又は折り込んで袋状物に形成し、この袋状物の開口端部側を除いた端縁の各内面同士を熱接着して端縁に熱接着部を形成する袋状容器の製造方法である。
前記袋状物の端縁の各内面同士を熱接着するに際し、底壁側の端縁は船底形に熱接着し、この船底形の立ち上がり部の熱接着部外側下方部を切除して脚部を形成するようにすることもできる。
【０００８】
【発明の実施の形態】
図１は、本発明の製造方法で作った袋状容器の一例を示す斜視図であって、袋状容器の上方開口端に中空円筒状の取出し具２１を挟んで熱接着し、内容物を充填してキャップ２２で密封した状態を示す。
図１において、袋状容器１は、向かい合った一対の平面部２と、その間に位置して内側に向かって二つ折りして接着した一対の側壁部３及びこれらの一端を覆う底壁部とからなり、一対の平面部２と側壁部３とは、それぞれ接着部５，５’で熱接着され、底壁部は、接着部６，７，７’で熱接着されている。
この袋状容器１を正面から見ると、底側が船底形に熱接着され、接着部５と接着部６との間を斜め方向に繋ぐ立上がり部７が形成されていて、袋状容器１に脚部が形成されているように見える。
【０００９】
袋状容器１を構成するシートは、多層ラミネートシートを使用し、その一例を次に示す。外層から順に、厚さ１５μｍで融点が２４５℃程の二軸延伸ポリエステルフィルムと、厚さ１２μｍのシリカ蒸着ポリエステルフィルムと、厚さ１５μｍの延伸ナイロンフィルムと、最内層に厚さ８０μｍで融点が熱接着温度１４０℃よりも低い１２５℃程のポリエチレンフィルムとを積層して多層ラミネートシートとした。
なお、ガスバリヤー性の向上を図るため、中心層の厚さ１２μｍのシリカ蒸着ポリエステルフィルムに代え、厚さ１０μｍのアルミ箔としてもよい。
【００１０】
上記のように、袋状容器１を構成する多層ラミネートシートの最内層に、最外層の合成樹脂よりも融点が低く、かつ、ヒートシール温度よりも低い合成樹脂を使用しているので、熱接着するときに、最内層同士が向かい合う面が熱接着し、袋状容器１の端縁部に、熱接着部５〜７’を一時に形成することができる。
【００１１】
図２ないし図４に、図１に示す袋状容器の製造工程を示す。
図２は、一対の平面部２，２’の中央部に、底壁部４を一体に形成した帯状の多層ラミネートシート１１の正面図で、表側が最内層となっている状態を示す。
先ず、この帯状シート１１の底壁部４を四等分する位置に横方向に横断する一直線の複数の平行な折り線１２，１２’，１３，１３’，１４を想定し、押し板を使用して平面部２，２’と底壁部４との境界を一点鎖線で示す谷折り線１２，１２’で谷折りし、この谷折り線１２，１２’と底壁部４の中央線１４との間の二点鎖線で示す山折り線１３，１３’に沿って山折し、側面形状がパンタグラフ状となるように折り畳む。
【００１２】
前記のパンタグラフ状に折り畳んだシート１１に、縦長に内面側となる面を外向きに縦長に二つ折りにした一対の側壁部３，３’を付記して図３に示す。図３Ａは平面図、図３Ｂは右側面図である。
次に、図４Ａに示すように、一対の側壁部３，３’をそれぞれの折り目を向かい合わせて平面部２’の側縁部に揃え、その下端縁を底壁部４の中央の谷折り線１４上に合致させて載置する。続いて、平面部２を立て起し、底壁部４の中央の谷折り線１４に沿って谷折し、図４Ｂに示すように袋状に折り畳む。
【００１３】
前記のように折り畳んだ袋状物の開口部を除く端縁を、底部に船底形を備えた熱接着装置を用いて外側から挟んで熱接着する。
帯状シート１１及び一対の側壁部３，３’は、最内層が最も融点の低い多層ラミネートシートを使用しているので、平面部２，２’と側壁部３，３’と底壁部４の互いに重なり合った最内層同士が熱接着し、図４Ｃに示すように、端縁に側部熱接着部５，５’と底部熱接着部６及び両者をつなぐ立ち上がり熱接着部７，７’が形成される。これと同時に、この立ち上がり熱接着部７，７’の外側下方部を斜めに切除して脚部を形成する。
【００１４】
図５ないし図７に第２の実施の態様を示す。この実施の態様において使用する多層ラミネートシートは、先に説明した第１の実施の態様において使用する帯状の多層ラミネートシート（図２参照）の平面部の側方に、図５に示すように、側壁部を一体に形成した形状に切り出した多層ラミネートシート１５を用いるものであって、平面部及び底面部の形状と折り畳み方は、先に説明した第１の実施の態様と同じであるので、同一部位には図面に同一の符号を附して説明する。
図５に示す多層ラミネートシートは、平面部２の側方に側壁部３を一体に形成すると共に、平面部２’の反対側の側方に側壁部３’を一体に形成し、ほぼＺ字形のシート１５としたものである。
【００１５】
上記のＺ字形のシート１５の底壁部４を、第１の実施の態様と同様に、平面部２，２’と底壁部４との境界の一点鎖線で示す谷折り線１２，１２’で谷折りし、この谷折り線１２，１２’と底壁部４の中央線１４との間の二点鎖線で示す山折り線１３で山折りし、側面形状がパンタグラフ状となるように折り畳む。この状態を図６に示し、図６Ａは平面図、図６Ｂは右側面図である。
【００１６】
次に、側壁部３，３’の山折り線１８，１８’と、平面部２，２’との境界の谷折り線１７，１７’で側壁部３，３’をそれぞれ内方に折り畳み、平面部２，２’と底壁部４の上に折り重ねる。この状態を図７に示し、図７Ａは平面図、図７Ｂは右側面図、図７Ｃは底面図である。
続いて、一方の平面部２と側壁部３とを立て起し、底壁部４の谷折り線１４で谷折し、第１の実施の態様と同様（図４Ｂ参照）に袋状に折り畳む。
これと同時に、第１の実施の態様と同様（図４Ｃ参照）に、袋状物の端縁を一度に熱接着し、その熱接着の外側下方部を斜めに切除して脚部を形成する。
この第２の実施の態様では、平面部と底壁部と側壁部とを一体としたほぼＺ字形のシートを用いて袋状に折り畳むので、第１の実施の態様のように、別体とし折り畳んだ側壁部を平面部の側縁に揃えて載置する必要がなく、袋状物の成形が容易となる。
【００１７】
図８ないし図９に第２の実施の態様の変形例を示す。
使用する多層ラミネートシートを、ほぼＺ字形のシート１５に代え、図８に示すように、その側壁部３を平面部２の右側に移した、ほぼＴ字形シート１９を用いるようにしたものであり、その平面部及び底面部の形状と折り畳み方及び熱接着の方法は、先に説明した第２の実施の態様と同じであるので、同一部位について第２の実施の態様を示す図面に附した符号と同一の符号を図８ないし図９に附すにとどめ、詳細な説明は省略する。
【００１８】
前記の実施の態様では、袋状容器の底側が船底形に熱接着され、接着部５と接着部６との間を斜め方向に繋ぐ立上がり部７が形成されている（図１参照）が、図１０に示すように、折り畳んだ袋状物の角形の端縁に沿って熱接着し、側部熱接着部５と角形の底部熱接着部１６を備えた袋状容器としてもよい。
【００１９】
【発明の効果】
本発明は、袋状容器を形成する少なくとも一対の平面部と底壁部とを一体とした形状の多層ラミネートシートを使用し、一直線の平行な折り線のみで底壁部を折り畳むようにしたので、薄いシートに予め折り癖を付ける必要がなく、製造の自動化を簡易に行うことができる。
【図面の簡単な説明】
【図１】本発明の製造方法で作った袋状容器の一例を示す斜視図。
【図２】本発明に使用する帯状シートの正面図。
【図３】図２に示す帯状シートの底壁部の折り方を示す説明図。
【図４】袋状物への折り畳み及び熱接着工程を示す説明図。
【図５】第２の実施形態に使用するＺ字形シートを示す平面図。
【図６】図５に示すＺ字形シートの底壁部の折り方を示す説明図。
【図７】図６の側壁部を折り込んだ状態を示す説明図。
【図８】第２の実施形態に使用するＴ字形シートを示す平面図。
【図９】図８に示すＴ字形シートの底壁部の折り方を示す説明図。
【図１０】本発明で製造する袋状容器の別の形態を示す斜視図。
【符号の説明】
１：袋状容器 ２，２’：平面部 ３，３’：側壁部 ４：底壁部 ５〜７’，１６：接着部 １１：帯状シート １５：Ｚ字形シート １２，１２’，１４，１７，１７’：谷折り線 １３，１３’，１８，１８’：山折り線 １９：Ｔ字形シート[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a self-supporting bag-like container for filling a liquid drink such as a sports drink or juice, and particularly relates to a method for manufacturing a bag-like container that can be efficiently manufactured by automation.
[0002]
[Prior art]
A pair of flat surface portions constituting the front and rear surfaces of the bag-like container, a pair of side wall portions folded and bonded inside between the flat surface portions, and one end of the flat surface portion and the side wall portions so as to cover The bag-like container provided with the bonded bottom portion forming sheet can have a larger volume than the bag-like container provided with no side wall portion by providing the side wall portion. The square shape is square, and the gap between the containers can be reduced when the bag-like containers are boxed.
[0003]
A bag-like container having a side wall as described above and a method for manufacturing the same are disclosed in Japanese Patent Application Laid-Open No. 5-221451. When the bag-like container is filled with the contents, the bottom heat seal part and the bottom part are disclosed. The formed sheet is horizontal and has excellent self-supporting stability.
[0004]
The above-mentioned bag-like container is excellent in self-supporting stability, but when the bag-like container is lifted by hand, the bottom wall part is a horizontal surface, so the weight of the contents is sealed horizontally with the bottom wall part. The bottom wall portion is easily bent downward, and there is a problem in the shape retention of the bottom portion, which is an obstacle to manufacturing the bag-like container with a thin material.
In addition, the manufacturing method takes time since it requires a step of making a cut in the sealed portion between the bonded flat portion and the side wall, and a step of folding the cut-out side wall portion outward.
[0005]
Therefore, the present applicant has applied for a patent for an invention of a manufacturing method that can manufacture a bag-shaped container having good shape retention and self-supporting stability using an automated process using a thin material (Japanese Patent Application No. 2000-128620). did.
In the invention of this prior application, the pair of flat portions and the bottom are formed in a portion constituting the bottom wall portion of an integral belt-like multilayer laminate sheet constituting a pair of flat portions and a bottom wall portion located between the flat portions. A pair of folds transversely defining the wall, a fold that bisects the bottom wall divided by the pair of folds in the lateral direction, one point on the fold, and the plane portion Forming folds connecting the side edge portions of a pair of folds crossing in the lateral direction defining the bottom wall portion symmetrically in the lateral direction of the bottom wall portion; and Folding the outer wall side of the bottom wall part into two halves along the crease that bisects, folding the inner wall side of both side edges together, and so as to cover the folded bottom wall part The step of folding a pair of flat portions along the crease and the side wall portions folded vertically into two folds In addition, the step of sandwiching the folded flat portion and the bottom wall portion from both sides, the side wall portions, the flat portions, and the folded side edges of the bottom wall portion are thermally bonded to the flat portion. It is a manufacturing method of the bag-shaped container which consists of the process of forming the heat bonding part extended in the same direction in a side edge.
[0006]
[Problems to be solved by the invention]
In the manufacturing method of the above-mentioned prior application, when the bottom wall portion is folded into a mountain shape, it is necessary to put a crease in advance in order to form an oblique ridgeline. This requires extra effort in automating the manufacturing process.
The present invention makes it possible to easily produce a bag-like container that can be folded into a bag-like shape without a crease in advance on a thin material sheet and has good shape retention and good self-supporting stability by an automated process. It aims at providing the manufacturing method which can be performed.
[0007]
[Means for Solving the Problems]
The present invention includes a pair of flat portions constituting a front surface and a rear surface of a bag-shaped container, a pair of side wall portions that are folded inwardly between the flat portions, and one end of the flat portion and the side wall portions. In the manufacturing method of the bag-shaped container that forms the bottom wall portion to be covered with the multilayer laminate sheet,
An integral sheet that forms at least a pair of plane portions and a bottom wall portion located between them is formed, and the bottom wall portion of the sheet is laterally extended along the boundary between the pair of plane portions and the bottom wall portion. A pair of straight valley fold lines crossing the line, and a bottom wall portion defined by the pair of valley fold lines, and two straight straight mountains that divide the horizontal center line between the pair of valley fold lines. Folded into a pantograph-like side shape with a fold line, and then folded into a vertically long pair of side wall portions, folded inward so that the mountain fold line side faces each other and the side of the pair of flat portions A method for manufacturing a bag-like container that is formed or folded into a bag-like product, and heat-bonds each inner surface of the edge except for the opening end side of the bag-like material to form a heat-bonded portion at the edge. is there.
When the inner surfaces of the edges of the bag-like object are thermally bonded to each other, the edge on the bottom wall side is thermally bonded to the bottom of the ship, and the lower part outside the heat bonded part of the rising part of the bottom of the ship is cut off. Can also be formed.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view showing an example of a bag-shaped container made by the manufacturing method of the present invention, in which a hollow cylindrical take-out tool 21 is sandwiched between the upper open end of the bag-shaped container and the contents are bonded. The state which filled and sealed with the cap 22 is shown.
In FIG. 1, a bag-like container 1 is composed of a pair of opposed flat portions 2, a pair of side wall portions 3 that are located between them and are folded inward and bonded together, and a bottom wall portion that covers one end thereof. Thus, the pair of flat surface portions 2 and the side wall portions 3 are thermally bonded by the bonding portions 5 and 5 ', respectively, and the bottom wall portions are thermally bonded by the bonding portions 6, 7, and 7'.
When the bag-like container 1 is viewed from the front, the bottom side is thermally bonded to the bottom of the ship, and a rising portion 7 is formed to connect the bonding portion 5 and the bonding portion 6 in an oblique direction. The part appears to be formed.
[0009]
The sheet | seat which comprises the bag-shaped container 1 uses a multilayer laminated sheet, and the example is shown below. In order from the outer layer, a biaxially stretched polyester film having a thickness of 15 μm and a melting point of about 245 ° C., a silica-deposited polyester film having a thickness of 12 μm, a stretched nylon film having a thickness of 15 μm, and an innermost layer having a thickness of 80 μm and a melting point A polyethylene film having a bonding temperature of about 125 ° C. lower than 140 ° C. was laminated to obtain a multilayer laminate sheet.
In order to improve gas barrier properties, an aluminum foil having a thickness of 10 μm may be used instead of the silica-deposited polyester film having a thickness of 12 μm in the center layer.
[0010]
As described above, the innermost layer of the multilayer laminate sheet constituting the bag-like container 1 uses a synthetic resin having a melting point lower than that of the outermost synthetic resin and lower than the heat seal temperature. When this is done, the surfaces of the innermost layers facing each other are thermally bonded, and thermal bonding portions 5 to 7 ′ can be formed on the edge of the bag-like container 1 at a time.
[0011]
2 to 4 show a manufacturing process of the bag-like container shown in FIG.
FIG. 2 is a front view of a strip-shaped multilayer laminate sheet 11 in which a bottom wall portion 4 is integrally formed at the center of a pair of plane portions 2 and 2 ′, and shows a state where the front side is the innermost layer.
First, assuming a plurality of straight parallel fold lines 12, 12 ′, 13, 13 ′, and 14 transversely crossing the bottom wall portion 4 of the belt-like sheet 11 into quarters, a push plate is used. Then, the boundary between the plane portions 2 and 2 ′ and the bottom wall portion 4 is valley-folded at valley fold lines 12 and 12 ′ indicated by alternate long and short dashed lines, and the valley fold lines 12 and 12 ′ and the center line 14 of the bottom wall portion 4 are Are folded along mountain fold lines 13 and 13 'indicated by a two-dot chain line between them, and folded so that the side surface has a pantograph shape.
[0012]
FIG. 3 shows a pair of side wall portions 3 and 3 ′ in which the sheet 11 folded in the pantograph shape is vertically folded into a vertically long surface on the inner surface side. 3A is a plan view and FIG. 3B is a right side view.
Next, as shown in FIG. 4A, the pair of side wall portions 3 and 3 ′ are aligned with the side edges of the flat surface portion 2 ′ with the respective folds facing each other, and the lower end edge is folded at the center of the bottom wall portion 4. Place on line 14 in a matched manner. Subsequently, the flat surface portion 2 is raised, folded along a valley fold line 14 at the center of the bottom wall portion 4, and folded into a bag shape as shown in FIG. 4B.
[0013]
The edge except for the opening of the bag-like product folded as described above is heat-bonded by sandwiching it from the outside using a heat bonding apparatus having a bottom at the bottom.
Since the belt-like sheet 11 and the pair of side wall portions 3 and 3 ′ use a multilayer laminate sheet having an innermost layer having the lowest melting point, the plane portions 2 and 2 ′, the side wall portions 3 and 3 ′, and the bottom wall portion 4 The innermost layers that overlap each other are thermally bonded to each other, and as shown in FIG. 4C, side thermal adhesive portions 5 and 5 ′ and bottom thermal adhesive portions 6 and rising thermal adhesive portions 7 and 7 ′ that connect the two are formed at the end edges. Is done. At the same time, the outer lower portions of the rising thermal bonding portions 7 and 7 'are cut obliquely to form the leg portions.
[0014]
5 to 7 show a second embodiment. As shown in FIG. 5, the multilayer laminate sheet used in this embodiment is located on the side of the plane portion of the strip-shaped multilayer laminate sheet (see FIG. 2) used in the first embodiment described above. Since the multilayer laminate sheet 15 cut into a shape in which the side wall portion is integrally formed is used, the shape of the flat surface portion and the bottom surface portion and how to fold are the same as in the first embodiment described above, The same parts are described with the same reference numerals in the drawings.
The multilayer laminate sheet shown in FIG. 5 has a side wall portion 3 integrally formed on the side of the plane portion 2 and a side wall portion 3 ′ formed integrally on the side opposite to the plane portion 2 ′. The sheet 15 is used.
[0015]
Similar to the first embodiment, the bottom wall portion 4 of the Z-shaped sheet 15 is a valley fold line 12, 12 ′ indicated by a one-dot chain line at the boundary between the flat portion 2, 2 ′ and the bottom wall portion 4. Folded at a mountain fold line 13 indicated by a two-dot chain line between the valley fold lines 12 and 12 'and the center line 14 of the bottom wall portion 4 and folded so that the side surface has a pantograph shape. . FIG. 6 shows this state, FIG. 6A is a plan view, and FIG. 6B is a right side view.
[0016]
Next, the side wall portions 3 and 3 'are folded inwardly at the valley fold lines 17 and 17' at the boundary between the side wall portions 3 and 3 'and the flat surface portions 2 and 2', respectively. Fold over the flat portions 2, 2 ′ and the bottom wall 4. FIG. 7 is a plan view, FIG. 7B is a right side view, and FIG. 7C is a bottom view.
Subsequently, one flat surface portion 2 and the side wall portion 3 are erected, folded at a valley fold line 14 of the bottom wall portion 4, and folded into a bag shape in the same manner as in the first embodiment (see FIG. 4B). .
At the same time, as in the first embodiment (see FIG. 4C), the edges of the bag-like object are thermally bonded at a time, and the outer lower part of the thermal bonding is cut obliquely to form the legs. .
In this second embodiment, since it is folded into a bag shape using a substantially Z-shaped sheet in which the flat surface portion, the bottom wall portion and the side wall portion are integrated, it is separated as in the first embodiment. There is no need to place the folded side wall portion so as to be aligned with the side edge of the flat portion, and the bag-like product can be easily formed.
[0017]
8 to 9 show modifications of the second embodiment.
The multilayer laminate sheet to be used is replaced with a substantially Z-shaped sheet 15, and as shown in FIG. 8, a substantially T-shaped sheet 19 in which the side wall portion 3 is moved to the right side of the flat surface portion 2 is used. The shape of the flat surface portion and the bottom surface portion, the folding method, and the method of thermal bonding are the same as those of the second embodiment described above, and therefore, the same portions are attached to the drawings showing the second embodiment. Only the same reference numerals as those in FIG. 8 are attached to FIGS. 8 to 9, and detailed description thereof is omitted.
[0018]
In the above-described embodiment, the bottom side of the bag-like container is thermally bonded to the ship bottom shape, and the rising portion 7 that connects the bonding portion 5 and the bonding portion 6 in an oblique direction is formed (see FIG. 1). As shown in FIG. 10, it is good also as a bag-shaped container which heat-bonded along the square edge of the folded bag-shaped thing, and was equipped with the side part heat bonding part 5 and the square bottom heat bonding part 16. FIG.
[0019]
【The invention's effect】
The present invention uses a multilayer laminate sheet having a shape in which at least a pair of flat portions and a bottom wall portion forming a bag-like container are integrated, and the bottom wall portion is folded only by a straight parallel fold line. Therefore, it is not necessary to crease the thin sheet in advance, and manufacturing can be automated easily.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a bag-like container made by the manufacturing method of the present invention.
FIG. 2 is a front view of a belt-like sheet used in the present invention.
FIG. 3 is an explanatory view showing how to fold the bottom wall portion of the belt-like sheet shown in FIG. 2;
FIG. 4 is an explanatory view showing folding and thermal bonding steps for a bag-like object.
FIG. 5 is a plan view showing a Z-shaped sheet used in the second embodiment.
6 is an explanatory view showing how to fold the bottom wall portion of the Z-shaped sheet shown in FIG. 5. FIG.
7 is an explanatory view showing a state in which the side wall portion of FIG. 6 is folded.
FIG. 8 is a plan view showing a T-shaped sheet used in the second embodiment.
FIG. 9 is an explanatory diagram showing how to fold the bottom wall portion of the T-shaped sheet shown in FIG. 8;
FIG. 10 is a perspective view showing another embodiment of the bag-like container manufactured by the present invention.
[Explanation of symbols]
1: Bag-like container 2, 2 ': Flat part 3, 3': Side wall part 4: Bottom wall part 5-7 ', 16: Adhesive part 11: Belt-like sheet 15: Z-shaped sheet 12, 12', 14, 17 , 17 ': Valley fold line 13, 13', 18, 18 ': Mountain fold line 19: T-shaped sheet

Claims (3)

袋状容器の前面と後面を構成する一対の平面部と、該平面部間に内側に二つ折りして接着される一対の側壁部と、前記平面部と側壁部との一端を覆う底壁部とを、多層ラミネートシートで形成する袋状容器の製造方法において、
一対の平面部と該平面部の中間に位置する底壁部とを一体の帯状シートに形成する工程と、
該帯状シートの底壁部を、前記一対の平面部と底壁部との境界に沿って横方向に横断する一直線の一対の谷折り線と、該一対の谷折り線によって区画される底壁部をその横方向中央線と前記一対の谷折り線間を区分する二本の一直線の横方向山折り線とでパンタグラフ状の側面形状に折り畳む工程と、
縦長に二つ折りした一対の側壁部を、その山折り線側を向かい合わせて前記折り畳んだ底壁部の中央部と一方の平面部の側部にかけて載置する工程と、
前記袋状物の開口端部側を除いた端縁の各内面同士を熱接着して端縁に熱接着部を形成する工程とからなることを特徴とする袋状容器の製造方法。A pair of flat surface portions constituting the front and rear surfaces of the bag-like container, a pair of side wall portions that are folded inward and bonded between the flat surface portions, and a bottom wall portion that covers one end of the flat surface portion and the side wall portions In a method for manufacturing a bag-like container formed of a multilayer laminate sheet,
Forming a pair of plane portions and a bottom wall portion located in the middle of the plane portions into an integral belt-like sheet;
A pair of straight valley fold lines transversely crossing the bottom wall portion of the belt-like sheet along the boundary between the pair of flat portions and the bottom wall portion, and the bottom wall defined by the pair of valley fold lines Folding the part into a pantograph-shaped side face shape with two straight horizontal mountain fold lines separating the horizontal center line and the pair of valley fold lines;
A step of placing a pair of side wall portions folded in a vertically long manner over the central portion of the folded bottom wall portion and the side portion of one flat portion facing the mountain fold line side;
A method for manufacturing a bag-like container, comprising: heat-bonding inner surfaces of edges except for the opening end side of the bag-like material to form a heat-bonding portion on the edge. 袋状容器の前面と後面を構成する一対の平面部と、該平面部間に内側に二つ折りして接着される一対の側壁部と、前記平面部と側壁部との一端を覆う底壁部とを、多層ラミネートシートで形成する袋状容器の製造方法において、
一対の平面部と該平面部の中間に位置する底壁部と該平面部の側方に位置する一対の側壁部とを一体のシートに形成する工程と、
該シートの底壁部を、一対の平面部と底壁部との境界を横方向に横断する一直線の一対の谷折り線と、該一対の谷折り線によって区画される底壁部をその横方向中央線と前記一対の谷折り線間を区分する二本の一直線の横方向山折り線とでパンタグラフ状の側面形状に折り畳む工程と、
前記一対の側壁部を、縦に二つ折りする山折り線と平面部との境界の谷折り線とでそれぞれ折り畳み、その山折り線側を向かい合わせて前記パンタグラフ状に折り畳んだ底壁部の中央部と一方の平面部の側部にかけて折り畳む工程と、
前記底壁部の中央の谷折り線に沿って折り畳んで袋状物に形成する工程と、
該袋状物の開口端部側を除いた端縁の各内面同士を熱接着して端縁に熱接着部を形成する工程とからなることを特徴とする袋状容器の製造方法。A pair of flat surface portions constituting the front and rear surfaces of the bag-like container, a pair of side wall portions that are folded inward and bonded between the flat surface portions, and a bottom wall portion that covers one end of the flat surface portion and the side wall portions In a method for manufacturing a bag-like container formed of a multilayer laminate sheet,
Forming a pair of planar portions, a bottom wall portion located in the middle of the planar portions, and a pair of side wall portions located on the sides of the planar portion in an integrated sheet;
A pair of straight valley fold lines transversely across the boundary between the pair of flat surfaces and the bottom wall section, and a bottom wall section defined by the pair of valley fold lines is Folding in a pantograph-like side shape with a direction center line and two straight horizontal mountain fold lines separating the pair of valley fold lines;
The pair of side wall portions are folded at a mountain fold line that folds vertically into two and a valley fold line at the boundary between the plane portions, respectively, and the center of the bottom wall portion is folded into the pantograph shape with the mountain fold line sides facing each other. A step of folding over the side part of the flat part and one side part,
A step of folding along the central valley fold line of the bottom wall portion to form a bag-like material;
A method of manufacturing a bag-like container comprising the steps of heat-bonding inner surfaces of edges except for the opening end side of the bag-like material to form a heat-bonding portion on the edge. 前記袋状物の端縁の各内面同士を熱接着するに際し、底壁側の端縁を船底形に熱接着し、該船底形の立ち上がり部の熱接着部外側下方部を切除する請求項１又は請求項２に記載の二山形底部を備えた袋状容器の製造方法。2. When thermally bonding the inner surfaces of the edges of the bag-like object, the edge on the bottom wall side is thermally bonded to the bottom of the ship, and the lower part outside the heat bonded part of the rising part of the bottom of the ship is cut off. Or the manufacturing method of the bag-shaped container provided with the double mountain shaped bottom part of Claim 2.
JP2001051220A 2001-01-22 2001-01-22 Manufacturing method of bag-like container Expired - Fee Related JP4544560B2 (en)

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52123018U (en) * 1976-03-11 1977-09-19
JPS56113544A (en) * 1980-02-12 1981-09-07 Fuji Seal Ind Co Ltd Selfferecting bag
JPS56123255A (en) * 1980-02-18 1981-09-28 Isao Hirata Simple square bottom vessel
JPS5774141U (en) * 1980-10-22 1982-05-07
JPS6252136U (en) * 1985-09-20 1987-04-01
JPH07314587A (en) * 1994-05-27 1995-12-05 Hosokawa Yoko:Kk Manufacture of bag
JPH11208676A (en) * 1998-01-27 1999-08-03 Toppan Printing Co Ltd Gusset bag with spout
JP2991897B2 (en) * 1993-06-30 1999-12-20 ハウス食品株式会社 Gazette-type packaging bags for filling food
JP2000062795A (en) * 1998-08-14 2000-02-29 Totani Giken Kogyo Kk Plastic bag and manufacture of it
JP3585424B2 (en) * 2000-06-09 2004-11-04 トタニ技研工業株式会社 Plastic bag
JP3800485B2 (en) * 1999-11-26 2006-07-26 大和製罐株式会社 Legged bag-like container and manufacturing method thereof

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52123018U (en) * 1976-03-11 1977-09-19
JPS56113544A (en) * 1980-02-12 1981-09-07 Fuji Seal Ind Co Ltd Selfferecting bag
JPS56123255A (en) * 1980-02-18 1981-09-28 Isao Hirata Simple square bottom vessel
JPS5774141U (en) * 1980-10-22 1982-05-07
JPS6252136U (en) * 1985-09-20 1987-04-01
JP2991897B2 (en) * 1993-06-30 1999-12-20 ハウス食品株式会社 Gazette-type packaging bags for filling food
JPH07314587A (en) * 1994-05-27 1995-12-05 Hosokawa Yoko:Kk Manufacture of bag
JPH11208676A (en) * 1998-01-27 1999-08-03 Toppan Printing Co Ltd Gusset bag with spout
JP2000062795A (en) * 1998-08-14 2000-02-29 Totani Giken Kogyo Kk Plastic bag and manufacture of it
JP3800485B2 (en) * 1999-11-26 2006-07-26 大和製罐株式会社 Legged bag-like container and manufacturing method thereof
JP3585424B2 (en) * 2000-06-09 2004-11-04 トタニ技研工業株式会社 Plastic bag

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