JP2015077988A

JP2015077988A - Liner

Info

Publication number: JP2015077988A
Application number: JP2013215745A
Authority: JP
Inventors: 基成勝又; Motonari Katsumata
Original assignee: Fujimori Kogyo Co Ltd
Current assignee: Fujimori Kogyo Co Ltd
Priority date: 2013-10-16
Filing date: 2013-10-16
Publication date: 2015-04-23

Abstract

PROBLEM TO BE SOLVED: To provide a liner that is made of a flat bag capable of being more easily expanded than a conventional product by self-weight of a liquid flowing in.SOLUTION: A liner 1 is made of a square flat bag 2 that has a storage part 24 formed by welding an opening side of a front surface film 22 with an inlet 21 and an opening side of a rear surface film 23 overlapping the front surface film 22 together. The liner 1 is folded by having the two opposed sides of the flat bag 2 inverted and each inserted in such a manner as to get closer to or come into contact with each other in the center of the storage part 24 of the flat bag 2.

Description

本発明は、酒類、調味料等の食品関連や洗剤等の工業薬品等の液体の輸送に用いられる液体コンテナ用ライナーに関するものである。 The present invention relates to a liner for a liquid container used for transporting liquids such as liquors, seasonings and other food-related products and industrial chemicals such as detergents.

近年、ドラム缶や１トンコンテナなどに代表される大型液体輸送容器において、酒類、調味料等の食品関連や洗剤等の工業薬品関連の大型輸送容器には、衛生性、液密性、容器の洗浄しやすさなどの点からプラスチック製内袋（ライナー）が使用されている。 In recent years, large liquid transport containers represented by drum cans and 1-ton containers, etc., food transport such as alcoholic beverages and seasonings, and large transport containers related to industrial chemicals such as detergents are sanitary, liquid-tight, and container washable. A plastic inner bag (liner) is used for ease of use.

ところで、上記のようなドラム缶のライナーやバッグインボックスのライナーに内容液となる液体を充填する場合、ライナーに内容液を充填して外装容器に入れる方法と外装容器に内袋（ライナー）を収納してから内容液を充填する方法とがある。特に、充填量が大きくなると、充填済みの内袋（ライナー）を外装容器に入れることが困難となるので、後者の充填方法は、２０リットルを超える液体を充填する場合に採用される。
そして、この場合、ライナーは輸送の都合上、予めコンパクトに折り畳まれており、その状態で外装容器内に収納した後、ライナーの注入口に充填ノズルを接続して、液体の充填が行なわれる。 By the way, when filling the liner liquid of the drum can and the liner of the bag-in-box as described above with the liquid which is the content liquid, the content liquid is filled into the liner and put into the outer container, and the inner bag (the liner) is stored in the outer container. Then, there is a method of filling the content liquid. In particular, as the filling amount increases, it becomes difficult to put the filled inner bag (liner) into the outer container, so the latter filling method is adopted when filling a liquid exceeding 20 liters.
In this case, the liner is folded compactly in advance for the convenience of transportation. After being accommodated in the outer container in this state, the filling nozzle is connected to the inlet of the liner to fill the liquid.

例えば特許文献１〜３には、注入口が表側に出るように、平袋からなるライナーの四辺または四隅を注入口側に折り畳み、注入口が上側になるようにライナーを外装容器内に収納した後、注入口から液体をライナーに充填することが記載されている。 For example, in Patent Documents 1 to 3, the four sides or four corners of a liner made of a flat bag are folded to the injection port side so that the injection port comes to the front side, and the liner is stored in the outer container so that the injection port is on the upper side. Later, it is described that the liner is filled with liquid from the inlet.

特開２００５−２８９４６４号公報JP 2005-289464 A 特開２０００−３３５６４０号公報JP 2000-335640 A 実開昭５０−１３２４２８号公報Japanese Utility Model Publication No. 50-132428

しかしながら、ライナーを注入口が表側に出るように折り畳んでも、折り線が明確なＶ字状に折り畳まれているので、折り線において、前面フィルムと後面フィルムが密着しており、液体が折り線を越えて折り畳まれた部分に流入しにくい。従って、ライナーの材質や充填する液体の粘度等によっては、流入する液体の自重ではライナーが十分に膨らまないことがある。 However, even if the liner is folded so that the injection port comes out on the front side, the fold line is folded into a clear V shape, so that the front film and the rear film are in close contact with each other at the fold line, and the liquid breaks the fold line. Difficult to flow into the part folded over. Therefore, depending on the material of the liner, the viscosity of the liquid to be filled, and the like, the liner may not sufficiently swell due to its own weight.

一方、ガゼット袋からなるライナーは、ガゼット折込部で折り畳まれているので、この様な問題は避けられる。しかし、ガゼット袋は、ガゼット折込部中央付近の溶着端部にフィルムの段差が生じるので注意して溶着する必要がある。しかも、ガゼット折込部中央付近の溶着端部は、液体を充填した時に最も荷重がかるので、大型液体輸送容器のライナーとして用いる場合は、特に注意を要する部位である。
本発明は、上記事情に鑑みてなされたもので、流入する液体の自重で、従来品に比べてより膨らみやすい平袋からなるライナーを提供することを課題とする。 On the other hand, since the liner which consists of a gusset bag is folded in the gusset folding part, such a problem is avoided. However, the gusset bag needs to be carefully welded because a step of the film is generated at the welding end near the center of the gusset folding portion. In addition, the weld end near the center of the gusset fold is the most loaded when filled with liquid, and is a part requiring special attention when used as a liner for a large liquid transport container.
This invention is made | formed in view of the said situation, and makes it a subject to provide the liner which consists of a flat bag which is easy to swell compared with the conventional product with the dead weight of the inflowing liquid.

本発明の発明者らは、流入する液体の自重で膨らみやすいライナーとするために、ライナーの折畳方法を鋭意検討した結果、平袋の対向する二辺を反転させて、それぞれが平袋の収納部の中央において接近または接触するように挿入して畳むことを着想した。その結果、流入する液体の自重が直接ライナーを膨らませる方向の力として作用するとの知見を得て本発明を完成した。 The inventors of the present invention have intensively studied how to fold the liner in order to make the liner easy to swell due to its own weight of the inflowing liquid. The idea was to insert and fold it so that it approaches or touches in the center of the storage. As a result, the present invention was completed with the knowledge that the dead weight of the flowing liquid acts as a force in the direction of directly inflating the liner.

すなわち、本発明は、以下のライナーを提供する。
（１）注入口を有する前面フィルムとそれに重なる後面フィルムの開口辺を溶着して収納部が形成された四角い平袋からなるライナーであって、
前記平袋の対向する二辺が反転して、それぞれが前記平袋の収納部の中央において接近または接触するように挿入されて畳まれたことを特徴とするライナー。
（２）前記平袋の対向する二辺が反転した時に左右両端にできた前面フィルムと後面フィルムのそれぞれの折り線の重なりの一部を広げて、前面フィルムの折り線同士および後面フィルムの折り線同士が重なるように押し潰して畳むことで、外装容器底面への載置面が形成された（１）に記載のライナー。
（３）前記平袋の収納部に反転して挿入された部位の少なくとも一の隅部が切断除去され、溶着により封止された（１）または（２）に記載のライナー。
（４）前記後面フィルムに排出口が溶着された（１）ないし（３）のいずれかに記載のライナー。
（５）前記前面フィルムおよび前記後面フィルムは、複数枚のフィルムが接着することなく重ねられてなる（１）ないし（４）のいずれかに記載のライナー。
（６）前記平袋は、チューブ状フィルムの開口する二辺が溶着されてなる（１）ないし（５）のいずれかに記載のライナー。
（７）前記平袋は、一組の前記前面フィルムおよび前記後面フィルムの四辺が溶着されてなる（１）ないし（６）のいずれかに記載のライナー。 That is, the present invention provides the following liner.
(1) A liner made of a square flat bag in which an opening portion of a front film having an inlet and a rear film overlapping therewith is welded to form a storage portion,
A liner characterized in that two opposite sides of the flat bag are inverted and are inserted and folded so as to approach or contact each other in the center of the storage portion of the flat bag.
(2) When the two opposite sides of the flat bag are reversed, a part of the overlap of the fold lines of the front film and the rear film formed on the left and right ends is widened, and the fold lines of the front film and the folds of the rear film are folded. The liner according to (1), wherein a placement surface on the bottom surface of the outer container is formed by crushing and folding so that the lines overlap each other.
(3) The liner according to (1) or (2), wherein at least one corner of the portion inserted in an inverted manner in the storage portion of the flat bag is cut and removed and sealed by welding.
(4) The liner according to any one of (1) to (3), wherein a discharge port is welded to the rear film.
(5) The liner according to any one of (1) to (4), wherein the front film and the rear film are stacked without bonding a plurality of films.
(6) The liner according to any one of (1) to (5), wherein the flat bag is formed by welding two sides of the tubular film that are opened.
(7) The liner according to any one of (1) to (6), wherein the flat bag is formed by welding four sides of the pair of the front film and the rear film.

（１）の発明によれば、注入口との間に、前面フィルムと後面フィルムが密着して液体が通過しにくい折り線が存在しないようにライナーの載置面を形成することができるので、折り畳まれた部分に液体が流入しやすい。また、平袋の対向する二辺が収納部の中央に存在するので、充填に伴い流入する液体がライナーを広げ、直接平袋の収納部に挿入された二辺を外側に押し出す方向の力として作用する。これにより、流入する液体の自重が直接ライナーを膨らませる力として作用するので膨らみやすいライナーとなる。 According to the invention of (1), since the front surface film and the rear surface film are in close contact with the injection port, the liner mounting surface can be formed so that there is no fold line through which the liquid does not easily pass. Liquid easily flows into the folded part. In addition, since the two opposite sides of the flat bag are present in the center of the storage part, the liquid flowing in as the filling spreads the liner, and as a force in the direction of pushing the two sides directly inserted into the storage part of the flat bag outward Works. As a result, the weight of the inflowing liquid acts as a force for directly inflating the liner, so that the liner can easily swell.

（２）の発明によれば、（１）の発明の効果に加えて、前面フィルムの折り線同士および後面フィルムの折り線同士が重なるように押し潰して畳むことで、ライナーの載置面が形成されている。この載置面と注入口との間には、前面フィルムと後面フィルムが密着して液体が通過しにくい折り線が存在しないので、折り畳まれた部分に液体が流入しやすい。注入口が上側になるようにライナーを外装容器底面に載置した後、そのまま、あるいは、注入口を引き上げて液体をライナーに充填する時に、ライナーの外装容器底面への載置面に液体が直接流入する。しかも、収納部の中央に存在する平袋の対向する二辺があたかもガゼット折込部のように膨らむので、外装容器の底面隅部において、フィルムに皺が発生しにくい。 According to the invention of (2), in addition to the effect of the invention of (1), the liner mounting surface is obtained by crushing and folding so that the fold lines of the front film and the fold lines of the rear film overlap each other. Is formed. Since there is no fold line between the placement surface and the injection port where the front film and the rear film are in close contact with each other and the liquid does not easily pass through, the liquid easily flows into the folded portion. After placing the liner on the bottom surface of the outer container so that the inlet is on the upper side, or when pulling up the inlet and filling the liner with liquid, the liquid is directly applied to the surface of the liner on the bottom surface of the outer container. Inflow. Moreover, since the two opposite sides of the flat bag present in the center of the storage section swell as if they were gusset folding parts, wrinkles are unlikely to occur in the bottom corners of the outer container.

（３）の発明によれば、（１）〜（２）の発明の効果に加えて、平袋の少なくとも一の隅部を切断除去してあるので、平袋の収納部に反転して挿入するときに、隅部においてフィルムが皺になりにくい。特に、平袋が四方シール袋である場合、平袋の収納部に挿入される辺と、それに隣接する辺のそれぞれの溶着辺が反転作業の邪魔になりにくいので好適である。これにより、反転作業が容易になると共に、外観も優れたものとなる。 According to the invention of (3), in addition to the effects of the inventions of (1) to (2), since at least one corner of the flat bag is cut and removed, it is inverted and inserted into the storage part of the flat bag. The film is less likely to wrinkle at the corners. In particular, when the flat bag is a four-sided seal bag, the side inserted into the flat bag storage portion and the respective welded sides adjacent to the side are less likely to obstruct the reversing operation. Thereby, the reversing work is facilitated and the appearance is also excellent.

（４）の発明によれば、（１）〜（３）の発明の効果に加えて、外装容器の下部または底面から内容液を排出する場合に好適である。
（５）の発明によれば、（１）〜（４）の発明の効果に加えて、複数枚のフィルムのいずれかにピンホールが発生してもライナーの外部に漏洩しにくい。
（６）の発明によれば、（１）〜（５）の発明の効果に加えて、溶着された辺を平袋の収納部に挿入する場合に、隣接する辺が溶着されていないので、フィルムの溶着部が折れて皺になりにくい。
（７）の発明によれば、（１）〜（６）の発明の効果に加えて、フィルム選択の自由度が高くなる。また、注入口や排出口の溶着が容易となる。また、ライナーを大容量としやすい。 According to the invention of (4), in addition to the effects of the inventions of (1) to (3), it is suitable for discharging the content liquid from the lower or bottom surface of the outer container.
According to the invention of (5), in addition to the effects of the inventions of (1) to (4), even if a pinhole occurs in any of the plurality of films, it is difficult to leak out of the liner.
According to the invention of (6), in addition to the effects of the inventions of (1) to (5), when the welded sides are inserted into the storage portion of the flat bag, the adjacent sides are not welded. The welded part of the film is not easily broken.
According to the invention of (7), in addition to the effects of the inventions of (1) to (6), the degree of freedom in film selection is increased. In addition, welding of the inlet and outlet is facilitated. Moreover, it is easy to make a liner large capacity.

（ａ）本発明のライナーに用いる平袋の一例および（ｂ）本発明のライナーの一例を模式的に示す平面図である。It is a top view which shows typically an example of the flat bag used for the liner of this invention, and (b) an example of the liner of this invention. 図１のライナーをさらに折り畳んだ一例を模式的に示す平面図である。It is a top view which shows typically an example which further folded the liner of FIG. 図１のライナーを外装容器に収納して液体を充填した状態を模式的に示す斜視図である。It is a perspective view which shows typically the state which accommodated the liner of FIG. 1 in the exterior container, and was filled with the liquid. （ａ）本発明のライナーに用いる別の平袋の一例および（ｂ）本発明の別のライナーの一例を模式的に示す平面図である。(A) It is a top view which shows typically an example of another flat bag used for the liner of this invention, and (b) an example of another liner of this invention. （ａ）図４のライナーに載置面が形成される様子および（ｂ）載置面が形成された本発明のライナーの一例を模式的に示す説明図である。(A) A mode that a mounting surface is formed in the liner of FIG. 4, (b) It is explanatory drawing which shows typically an example of the liner of this invention in which the mounting surface was formed. 載置面が形成された図４のライナーを外装容器に収納して液体を充填した状態を模式的に示す斜視図である。It is a perspective view which shows typically the state which accommodated the liner of FIG. 4 in which the mounting surface was formed in the exterior container, and was filled with the liquid.

以下、好適な実施の形態に基づき、図面を参照して本発明を説明する。
図１に示す形態例１のライナー１は、注入口２１が中央に融着された前面フィルム２２と、それに重なり、排出口６が下方に融着された後面フィルム２３の開口辺を溶着して収納部２４が形成された四角い平袋２を畳んでなる。ただし、溶着部等の細部は図示していない。
ライナー１は、平袋２の対向する二辺（図１（ａ）の左右の二辺）を反転させて、それぞれが平袋２の収納部２４の中央において、端縁同士が重なるように挿入して畳んだ挿入部２５，２５を有する。そして、挿入部２５の端縁に前面フィルム２２の折り線１１ａと後面フィルム２３の折り線１１ｂが重なったライナーの側辺１１が形成される。
側辺１１，１１間は、そのままライナー１の底面の幅（図１（ｂ）の左右の幅）となるので、ライナー１を収納する外装容器底面の内寸の横幅に対応した最適な幅を選択することが好ましい。 The present invention will be described below based on preferred embodiments with reference to the drawings.
The liner 1 of the embodiment 1 shown in FIG. 1 has a front film 22 in which an injection port 21 is fused in the center, and an opening side of a rear film 23 in which the discharge port 6 is fused in a downward direction. The square flat bag 2 in which the storage part 24 is formed is folded. However, details such as a welded portion are not shown.
The liner 1 is inserted so that two opposite sides of the flat bag 2 (two sides on the left and right in FIG. 1A) are reversed and the edges overlap each other in the center of the storage portion 24 of the flat bag 2. Thus, the insertion portions 25 and 25 are folded. Then, the side edge 11 of the liner in which the fold line 11a of the front film 22 and the fold line 11b of the rear film 23 overlap with each other at the edge of the insertion portion 25 is formed.
Since the width between the side edges 11 and 11 becomes the width of the bottom surface of the liner 1 as it is (the left and right widths in FIG. 1B), the optimal width corresponding to the inner width of the bottom surface of the outer container that houses the liner 1 is set. It is preferable to select.

ライナー１に用いる平袋２は、複数枚のフィルムが互いに接着されずに重ねられ、溶着部で複数枚のフィルムが溶着されて、収納部２４が形成されている。なお、平袋２は、一重のフィルムで構成されてもよい。
平袋２が二重のチューブである場合、一のチューブの開口端に他のチューブを挿入し、両端を溶着する。一のチューブの折径は、他のチューブの折径よりやや大きいことが好ましい。しかし、フィルムの厚さはチューブの折径に比べて極めて小さいので、同寸であってもよい。平袋２が三重以上の場合も同様である。
多重のチューブを用いる場合は、チューブが長く、折径が大きいと重ねる作業が困難となる場合があるので、ライナー１の容量が比較的小さい１０００リットル未満の場合に好適である。 In the flat bag 2 used for the liner 1, a plurality of films are stacked without being bonded to each other, and a plurality of films are welded at a welding portion to form a storage portion 24. The flat bag 2 may be composed of a single film.
When the flat bag 2 is a double tube, another tube is inserted into the open end of one tube and both ends are welded. The folding diameter of one tube is preferably slightly larger than the folding diameter of the other tube. However, since the thickness of the film is extremely small compared to the folding diameter of the tube, it may be the same size. The same applies when the flat bag 2 is triple or more.
The use of multiple tubes is suitable when the capacity of the liner 1 is less than 1000 liters because the tube is long and the folding diameter may be difficult if the tubes are long.

また、平袋２として、一枚または複数枚のフィルムの四辺が溶着された四方シール袋も用いることができる。この場合は、チューブの場合に比べて、フィルムが大きくても複数枚を重ねることが容易なので、ライナー１の容量が比較的大きい１０００リットル以上の場合に好適である。また前面フィルム２２と後面フィルム２３の四辺が開口しているので、注入口２１や排出口６を溶着することも容易である。
平袋２の大きさは、その内容量によって決定される。通常、その大きさは、幅５００〜３，０００ｍｍ、長さ５００〜５，０００ｍｍ程度である。そして、その内容量は、通常、２０リットル以上、好ましくは１００リットル以上、より好ましくは５００〜２，０００リットルである。 Further, as the flat bag 2, a four-side sealed bag in which four sides of one or a plurality of films are welded can also be used. In this case, as compared with the case of the tube, it is easy to stack a plurality of sheets even if the film is large. Therefore, the liner 1 has a relatively large capacity of 1000 liters or more, which is preferable. Further, since the four sides of the front film 22 and the rear film 23 are open, it is easy to weld the injection port 21 and the discharge port 6.
The size of the flat bag 2 is determined by its internal capacity. Usually, the size is about 500 to 3,000 mm in width and about 500 to 5,000 mm in length. And the internal volume is 20 liters or more normally, Preferably it is 100 liters or more, More preferably, it is 500-2,000 liters.

ライナー１は、平袋２の対向する二辺を反転させて平袋２の収納部２４に挿入して畳んだ挿入部２５を有する。挿入部２５は、前面フィルム２２と後面フィルム２３を指でつまんだり、吸盤で吸着したりして、引き離し、平袋２の対向する二辺とそれらに隣接する上辺と下辺のそれぞれの一部を外側から平袋２の収納部２４に向けて素手や適宜な部材を用いて押し込んで形成する。
平袋２がチューブの両端を溶着したものである場合、両端の溶着辺に挿入部２５を形成すると、挿入する辺に隣接する辺には溶着部が存在しないので、反転が容易となり、好ましい。また、後述する挿入部２５における挿入する辺の溶着辺とそれに隣接する辺の溶着辺の衝突がないので、平袋２の角を切断しなくてもよい。 The liner 1 has an insertion portion 25 that is folded by inserting two sides of the flat bag 2 that are opposite to each other into the storage portion 24 of the flat bag 2. The insertion part 25 pinches the front film 22 and the rear film 23 with a finger or sucks them with a sucker and separates them, and separates the two opposite sides of the flat bag 2 and the upper and lower sides adjacent to each other. It is formed by pushing from the outside toward the storage portion 24 of the flat bag 2 using a bare hand or an appropriate member.
When the flat bag 2 is formed by welding both ends of the tube, it is preferable to form the insertion portions 25 at the welding sides at both ends because the welding portion does not exist on the side adjacent to the side to be inserted, which facilitates inversion. Further, since there is no collision between the welded side of the side to be inserted and the welded side of the side adjacent to the side to be inserted in the insertion portion 25 described later, the corner of the flat bag 2 does not have to be cut.

平袋２が一枚または複数枚のフィルムからなる四方シール袋である場合、挿入部２５を形成する際、挿入する辺とそれに隣接する辺の隅部の溶着部がそれぞれ挿入部２５内で反転した溶着辺が連続した状態で残る。そして、挿入部２５の隅部２６において溶着辺同士が衝突するので、隅部２６がきれいに反転しないことがある。この衝突により、隅部２６に皺が発生することがあるので、反転する前に、隅部２６（平袋２の角）を切断除去し、必要により、溶着して封止することが好ましい。
溶着辺同士が直角に衝突することを回避すれば、溶着辺同士が衝突しても重なりやすい。従って、隅部２６を切断除去する場合は、二角が４５度の二等辺三角形に切断することが好ましい。また、切断除去する大きさは、平袋２を構成する基材フィルムの腰の強さにもよるが、皺になりにくい大きさで、可能な限り小さいことが好ましい。隅部２６の切断は、一か所以上設けられることが好ましく、四隅に設けられることがより好ましい。 When the flat bag 2 is a four-side sealed bag made of one or a plurality of films, when the insertion portion 25 is formed, the welding portion at the corner of the side to be inserted and the side adjacent to the side is inverted in the insertion portion 25. The welded side remains in a continuous state. And since the welding edges collide in the corner part 26 of the insertion part 25, the corner part 26 may not be reversed beautifully. Because of this collision, wrinkles may be generated at the corner 26. Therefore, it is preferable to cut and remove the corner 26 (the corner of the flat bag 2) before welding, and if necessary, weld and seal it.
If it is avoided that the welding sides collide at right angles, even if the welding sides collide with each other, they are likely to overlap. Therefore, when the corner portion 26 is cut and removed, it is preferable to cut the corner portion 26 into an isosceles triangle having 45 degrees. Moreover, although the magnitude | size to cut and remove is based also on the waist strength of the base film which comprises the flat bag 2, it is a magnitude | size which is hard to become a wrinkle, and it is preferable that it is as small as possible. The corner 26 is preferably cut at one or more locations, and more preferably at the four corners.

なお、隅部２６は、液体を充填した時、図３に示すように、外装容器５の側壁の中央付近に位置することになる。従って、隅部２６内には、液体が侵入してこないので、ここに皺が発生したとしても、そのまま内圧で押さえつけられるだけで、ピンホール等の不具合が発生するおそれはない。
また、平袋２の対向する二辺の端縁同士の配置は、ライナー１を収納する外装容器５の底面の横幅によって、以下のように設定することが好ましい。
外装容器５の底面の横幅が平袋２の横幅の半分未満である場合は、二辺の端縁同士の配置は、形態例１のライナー１のように重なる。
外装容器５の底面の横幅が平袋２の横幅の半分である場合は、二辺が突き合わせ状態に接触する。
外装容器５の底面の横幅が平袋２の横幅の半分を超える場合は、二辺が接近する。 The corner 26 is located near the center of the side wall of the outer container 5 as shown in FIG. Accordingly, since no liquid enters the corner portion 26, even if wrinkles are generated here, there is no possibility that problems such as pinholes may occur even if wrinkles are generated.
Moreover, it is preferable to set as follows the arrangement | positioning of the edge of two sides which the flat bag 2 opposes with the horizontal width of the bottom face of the exterior container 5 which accommodates the liner 1. FIG.
When the lateral width of the bottom surface of the outer container 5 is less than half of the lateral width of the flat bag 2, the arrangement of the edges of the two sides overlaps like the liner 1 of the first embodiment.
When the lateral width of the bottom surface of the outer container 5 is half of the lateral width of the flat bag 2, the two sides are in contact with each other.
When the width of the bottom surface of the outer container 5 exceeds half of the width of the flat bag 2, the two sides approach each other.

ライナー１は、注入口２１から液体を排出することができるが、液体の容易な排出のために、注入口２１とは異なる位置に排出口６を設けることが好ましい。注入口２１や排出口６は、公知のものを用いることができる。排出口６は、通常、外装容器の側壁の下部または底面に設けられた排出用の孔や部材に接続可能に設けられる。排出口６は、前面フィルム２２に設けることもできる。
ライナー１を外装容器に収納する場合、排出口６を外装容器５の所定の位置に接続した時に、注入口２１が排出口６より上方に来るような位置関係であれば、注入口２１と排出口６は、平袋２の自由な位置に設けることができる。注入口２１は、平袋２の中心付近に設けると、ライナー１を外装容器に収納して液体を充填する場合に、注入口２１を上から見たとき（平面視）、外装容器の中央付近に位置させやすい。注入口２１をこの様に位置させると、充填する液体が円滑にライナー１内に流入するので、充填時に人手をかけずにライナー１を膨らませることができるので好ましい。 The liner 1 can discharge the liquid from the injection port 21, but it is preferable to provide the discharge port 6 at a position different from the injection port 21 for easy discharge of the liquid. Known inlets 21 and outlets 6 can be used. The discharge port 6 is normally provided so as to be connectable to a discharge hole or member provided in the lower part or the bottom surface of the side wall of the exterior container. The discharge port 6 can also be provided in the front film 22.
When the liner 1 is housed in the outer container, the inlet 21 and the outlet 21 are disposed if the inlet 21 is located above the outlet 6 when the outlet 6 is connected to a predetermined position of the outer container 5. The outlet 6 can be provided at a free position of the flat bag 2. When the inlet 21 is provided near the center of the flat bag 2, when the inlet 1 is viewed from above (plan view) when the liner 1 is stored in the outer container and filled with liquid, the vicinity of the center of the outer container Easy to position. Positioning the injection port 21 in this manner is preferable because the liquid to be filled smoothly flows into the liner 1 and the liner 1 can be inflated without manual operation during filling.

ライナー１に液体を充填するには、注入口２１が上を向くようにライナー１の折り線１１ｂ，１１ｂ間を外装容器５の底面に載置して、外装容器５の底面に設けられた排出用の孔や部材に排出口６を接続する。そして、そのまま注入口２１から液体を充填し始めると、前面フィルム２２と後面フィルム２３の間に液体が流入し、これらの間隔が広がる。そのとき、流入する液体が直接平袋２の挿入部２５，２５を外側に押し出す。従って、人手をかけずに、ライナー１を膨らませながら充填することができる。
そして、充填が進むにつれて、挿入部２５，２５が水平方向にせり出してきて、外装容器５の対向する側壁に密着する。挿入部２５，２５は、水平方向に向かって押し出されていくので、充填完了時には、挿入部２５，２５が密着しない外装容器５の対向する側壁には、後述する形態例２のライナー４に液体を充填する場合の天面と同様な三角形２７，２７，２７，２７が形成される。そして、挿入部２５，２５がせり出す際に、重なっていた挿入部２５，２５の隅部２６，２６も少し動いて、充填完了時には、図３に示す状態となる。 In order to fill the liner 1 with the liquid, the space between the fold lines 11b and 11b of the liner 1 is placed on the bottom surface of the outer container 5 so that the inlet 21 faces upward, and the discharge provided on the bottom surface of the outer container 5 is placed. The discharge port 6 is connected to a hole or member for use. And if it begins to fill with the liquid from the inlet 21 as it is, a liquid will flow in between the front film 22 and the rear film 23, and these space | intervals will spread. At that time, the inflowing liquid directly pushes the insertion portions 25 and 25 of the flat bag 2 outward. Accordingly, the liner 1 can be filled while being inflated without manpower.
As the filling progresses, the insertion portions 25 and 25 protrude in the horizontal direction and come into close contact with the opposing side walls of the outer container 5. Since the insertion portions 25 and 25 are pushed out in the horizontal direction, when filling is completed, a liquid is applied to the liner 4 of the second embodiment described later on the opposing side wall of the outer container 5 to which the insertion portions 25 and 25 are not in close contact. The same triangles 27, 27, 27, 27 as the top surface in the case of filling are formed. And when the insertion parts 25 and 25 protrude, the corner parts 26 and 26 of the insertion parts 25 and 25 which overlapped will also move a little, and will be in the state shown in FIG. 3 at the time of filling completion.

形態例１のライナー１は、さらにコンパクトに折り畳むことができる。例えば、図２に示すように、注入口２１と排出口６が表側に出るように、ライナー１の上辺を注入口２１側に、下辺を排出口６側に折り畳む。そして、折り畳んだ時の大きさを、ライナー１を収納する外装容器５の底面の内寸の縦横幅に対応した最適な幅とすることが好ましい。
この様に折り畳むと、注入口２１と排出口６が表側を向いているので、外装袋で個包装した時に、前面フィルム２２や後面フィルム２３が傷付きにくい。そして、個包装品または未包装品を段ボール箱等で集合包装する場合に、効率よく包装できる。なお、注入口２１と排出口６が異なる方向を向いていてもよい。特に、外装容器の天面および底面の中心付近の孔に接続するなどの場合は、両者が重なっていてもよい。 The liner 1 of the first embodiment can be folded more compactly. For example, as shown in FIG. 2, the upper side of the liner 1 is folded to the injection port 21 side and the lower side is folded to the discharge port 6 side so that the injection port 21 and the discharge port 6 come to the front side. And it is preferable to make the magnitude | size when folded into the optimal width corresponding to the vertical and horizontal width of the inner dimension of the bottom face of the exterior container 5 which accommodates the liner 1.
When folded in this way, since the inlet 21 and the outlet 6 face the front side, the front film 22 and the rear film 23 are not easily damaged when individually wrapped in an exterior bag. Then, when individually packaged products or unpackaged products are collectively packaged in a cardboard box or the like, it can be packaged efficiently. Note that the inlet 21 and the outlet 6 may face different directions. In particular, when connecting to a hole near the center of the top surface and bottom surface of the outer container, both may be overlapped.

平袋２を構成する基材としては、ポリエチレン（ＰＥ）やポリプロピレン（ＰＰ）などのポリオレフィンの樹脂層が用いられる。これらは単層フィルムでもよいし、これらが積層された積層フィルムでもよい。積層フィルムとしては、ポリオレフィンを溶着層とし、これにポリエチレンテレフタレート（ＰＥＴ）等のポリエステル樹脂、ナイロン（Ｎｙ）等のポリアミド樹脂、二軸延伸ポリプロピレン（ＯＰＰ）等の補強用の樹脂層を積層したものが用いられる。補強用の樹脂層は、未延伸でも、延伸されていてもよい。
２重袋や３重袋の内側となる樹脂層は、両面が溶着可能な単層フィルムや積層フィルムを用いて、溶着部において内側樹脂層と外側樹脂層とを溶着可能にする必要がある。 As the base material constituting the flat bag 2, a polyolefin resin layer such as polyethylene (PE) or polypropylene (PP) is used. These may be a single layer film or a laminated film in which these are laminated. As a laminated film, polyolefin is used as a welding layer, and a polyester resin such as polyethylene terephthalate (PET), a polyamide resin such as nylon (Ny), and a reinforcing resin layer such as biaxially stretched polypropylene (OPP) are laminated thereon. Is used. The reinforcing resin layer may be unstretched or stretched.
The resin layer inside the double bag or triple bag needs to be capable of welding the inner resin layer and the outer resin layer at the weld portion using a single layer film or a laminated film that can be welded on both sides.

基材フィルムには、酸素や水蒸気等のガスを遮断するためのガスバリア層として、例えばアルミニウムなどの金属蒸着層、酸化ケイ素や酸化アルミニウム等の無機化合物蒸着層、エチレン−ビニルアルコール共重合体（ＥＶＯＨ）や塩化ビニリデン（ＰＶＤＣ）等のガスバリア性樹脂層、アルミニウム箔等の金属層を積層することもできる。
積層フィルムの積層方法としては、ドライラミネート法、押出ラミネート法、共押出法等が挙げられる。積層に際しては、各層の間には、両者を接着するため接着剤や接着性樹脂からなる接着層やアンカー剤層等を設けてもよい。
基材フィルムの厚さは、特に制限されないが、取り扱いやすさを考慮すると厚み６０〜４００μｍが好適である。 For the base film, as a gas barrier layer for blocking gas such as oxygen and water vapor, for example, a metal deposition layer such as aluminum, an inorganic compound deposition layer such as silicon oxide or aluminum oxide, an ethylene-vinyl alcohol copolymer (EVOH) ) And vinylidene chloride (PVDC) and other gas barrier resin layers, and metal layers such as aluminum foil can be laminated.
Examples of the method for laminating the laminated film include a dry laminating method, an extrusion laminating method, and a coextrusion method. When laminating, an adhesive layer made of an adhesive or an adhesive resin, an anchor agent layer, or the like may be provided between the layers in order to bond them together.
The thickness of the base film is not particularly limited, but a thickness of 60 to 400 μm is preferable in consideration of ease of handling.

図５（ｂ）に示す形態例２のライナー４は、図４（ｂ）に示すライナー１の左右の側辺１１，１１（平袋２の挿入部２５，２５）の一部を広げて、外装容器底面への載置面１２が形成されている。図４（ｂ）のライナー１となる平袋２は、図４（ａ）に示すように、注入口２１が上方に設けられていること以外は、形態例１のライナー１となる平袋２と同様である。ただし、溶着部等の細部は図示していない。
形態例２のライナー４は、図６に示すように、充填したときに、注入口２１は外装容器５天面の中心付近の孔に接続され、排出口６は外装容器５の底面に設けられた排出用の孔に接続される。従って、ライナー４となる図４における平袋２は、注入口２１が前面フィルム２２の上方に設けられ、排出口６が後面フィルム２３に設けられている。
載置面１２の縦横の幅は、ライナー４を収納する外装容器の底面の内寸の縦横の幅に対応した最適な幅を選択することが好ましい。 The liner 4 of the embodiment 2 shown in FIG. 5 (b) expands a part of the left and right sides 11 and 11 (inserted portions 25 and 25 of the flat bag 2) of the liner 1 shown in FIG. A mounting surface 12 on the bottom surface of the outer container is formed. As shown in FIG. 4A, the flat bag 2 that becomes the liner 1 of FIG. 4B is the flat bag 2 that becomes the liner 1 of the embodiment 1 except that the injection port 21 is provided above. It is the same. However, details such as a welded portion are not shown.
As shown in FIG. 6, when the liner 4 of Embodiment 2 is filled, the inlet 21 is connected to a hole near the center of the top surface of the outer container 5, and the outlet 6 is provided on the bottom surface of the outer container 5. Connected to the discharge hole. Therefore, in the flat bag 2 in FIG. 4 serving as the liner 4, the inlet 21 is provided above the front film 22, and the outlet 6 is provided in the rear film 23.
The horizontal and vertical widths of the mounting surface 12 are preferably selected to be optimal widths corresponding to the vertical and horizontal widths of the inner dimensions of the bottom surface of the outer container that houses the liner 4.

形態例２のライナー４を形成するには、まず、形態例１のライナー１と同様にして図４（ｂ）に示すライナー１を作製する。載置面１２を形成するには、まずライナー１を裏返す。ライナー１の下部を形成しようとする載置面１２の高さの約半分だけ手前（紙面上方）に向けてＪ字状に折り曲げて、後面フィルム２３に谷折りの折り癖をつける。そして、
折り曲げた部分の前面フィルム２２のみを平に戻しつつ、平袋２の挿入部２５を広げて開口させる。開口した挿入部２５の前面フィルム２２と後面フィルム２３を摘んで挿入部２５の開口面に引き出して膨出部４１，４１を形成する。そして、前面フィルム２２の主面（収納部２４に挿入されない面）と後面フィルム２３の主面を山折りする。この状態のライナー１が図５（ａ）のライナー３である。ライナー３には、摘んで引き出された前面フィルム２２と後面フィルム２３が膨出部４１，４１として形成される。
ライナー３の状態から、さらに押し潰して完全に畳むと図５（ｂ）に示すライナー４が得られる。 In order to form the liner 4 of the embodiment 2, first, the liner 1 shown in FIG. 4B is manufactured in the same manner as the liner 1 of the embodiment 1. In order to form the mounting surface 12, the liner 1 is first turned over. The rear film 23 is folded in a J-shape toward the front (upper side of the paper) by about half the height of the mounting surface 12 to form the lower part of the liner 1, and valley folds are attached to the rear film 23. And
While only the folded front film 22 is returned to a flat shape, the insertion portion 25 of the flat bag 2 is widened and opened. The front film 22 and the rear film 23 of the opened insertion portion 25 are picked and pulled out to the opening surface of the insertion portion 25 to form the bulging portions 41 and 41. And the main surface (surface which is not inserted in the accommodating part 24) of the front film 22 and the main surface of the rear film 23 are folded in a mountain. The liner 1 in this state is the liner 3 in FIG. On the liner 3, the front film 22 and the rear film 23 which are picked and pulled out are formed as the bulging portions 41 and 41.
When the liner 3 is further crushed and completely folded, the liner 4 shown in FIG. 5B is obtained.

図５（ｂ）に示すように、ライナー４においては、後面フィルム２３が山折りに続いて谷折りされて後面フィルム２３同士がＮ字状に重なる。そして、前面フィルム２２が底辺となるように山折りされている。載置面１２は、前面フィルム２２と後面フィルム２３が図４（ｂ）のライナー１の下辺を挟んで平面で連続して形成されている。なお図５は、図４とは逆の方向から見ており、注入口２１が平面視、後面フィルム２３の裏側となる。
そして、前面フィルム２２と後面フィルム２３の山折り線が載置面１２の上辺と下辺になる。また、前面フィルム２２の折り線１１ａ，１１ａと後面フィルム２３の折り線１１ｂ，１１ｂが平面で繋がって載置面１２の両側辺１３，１３となる。
載置面１２の両側辺１３，１３は、挿入部２５，２５の膨出部４１，４１と重なる。そして、一部がライナー４の側辺１１，１１とも重なる。従って、載置面１２の両側辺１３，１３は、ライナー４の新しい側辺１１，１１でもある。 As shown in FIG. 5B, in the liner 4, the rear film 23 is valley-folded following the mountain fold, and the rear films 23 overlap each other in an N shape. And the front film 22 is mountain-folded so that it may become a base. The mounting surface 12 includes a front film 22 and a rear film 23 that are continuously formed on a plane with the lower side of the liner 1 in FIG. 5 is viewed from the opposite direction to FIG. 4, and the injection port 21 is the back side of the rear film 23 in plan view.
And the mountain fold line of the front film 22 and the rear film 23 becomes the upper side and the lower side of the mounting surface 12. In addition, the fold lines 11 a and 11 a of the front film 22 and the fold lines 11 b and 11 b of the rear film 23 are connected by planes to form both sides 13 and 13 of the mounting surface 12.
Both sides 13 and 13 of the mounting surface 12 overlap with the bulging portions 41 and 41 of the insertion portions 25 and 25. And a part also overlaps with the sides 11 and 11 of the liner 4. Therefore, both side sides 13 and 13 of the mounting surface 12 are also new side sides 11 and 11 of the liner 4.

ライナー４には、載置面１２の内側に前面フィルム２２と後面フィルム２３の膨出部４１を共通の底辺とする三角形４２が上下一対、左右一対、合計四つ形成される。この上下一対の三角形４２は、それぞれ収納部２４に挿入された辺が、挿入部２５の隅部２６と、挿入部２５が膨出部４１へと変化する膨出部４１の基部（膨出部４１の最も深い位置）から、それぞれ膨出部４１の両端に向かう二つの斜辺を有する。
挿入部２５の隅部２６を含む載置面１２側（下側）の三角形４２は、図６に示すように、液体を充填した時、液体の重さで載置面１２に密着する。膨出部４１の基部を含む挿入部２５側（上側）の三角形４２は、挿入部２５と共に液体に押し出されて、ライナー４の天面の一部と側壁１４となる。そして、側壁１４は、外装容器５の側壁に密着する。ライナー４の天面と外装容器５の天面との間には、通常、外装容器５の容量が目標とする充填量より大きいので空間ができる。
ライナー４においても、形態例１のライナー１と同様に、挿入部２５の隅部２６内には、液体が侵入しないので、ここに皺が発生したとしても、そのまま内圧で押さえつけられるだけで、ピンホール等の不具合が発生するおそれはない。 In the liner 4, four triangles 42 are formed on the inner side of the mounting surface 12, with a pair of upper and lower and left and right triangles 42 having a common base of the bulging portions 41 of the front film 22 and the rear film 23. The pair of upper and lower triangles 42 includes a base portion (a bulging portion) in which a side inserted into the storage portion 24 changes into a corner portion 26 of the insertion portion 25 and a bulging portion 41 in which the insertion portion 25 changes into a bulging portion 41. 41 at the deepest position), and has two hypotenuses toward both ends of the bulging portion 41.
As shown in FIG. 6, the triangle 42 on the placement surface 12 side (lower side) including the corner portion 26 of the insertion portion 25 is in close contact with the placement surface 12 due to the weight of the liquid. The triangle 42 on the insertion portion 25 side (upper side) including the base portion of the bulging portion 41 is pushed into the liquid together with the insertion portion 25 to become a part of the top surface of the liner 4 and the side wall 14. The side wall 14 is in close contact with the side wall of the outer container 5. A space is formed between the top surface of the liner 4 and the top surface of the exterior container 5 because the capacity of the exterior container 5 is usually larger than the target filling amount.
Also in the liner 4, as in the liner 1 of the first embodiment, since the liquid does not enter the corner portion 26 of the insertion portion 25, even if wrinkles occur, the pin 4 is simply pressed down by the internal pressure. There is no risk of problems such as holes.

ライナー４を外装容器５に収納する場合、排出口６を接続した時に、注入口２１が上方に来るような位置関係であれば、注入口２１と排出口６は、平袋２の自由な位置に設けることができる。ライナー４は、載置面が決まっているので、注入口２１を平袋２の上方に設けると、ライナー４を外装容器に収納して液体を充填する場合に、注入口２１を外装容器５の天面中央付近に位置させやすい。注入口２１をこの様に位置させると、充填する液体が円滑にライナー４内に流入するので、充填時に人手をかけずにライナー４を膨らませることができるので好ましい。排出口６は、前面フィルム２２に設けることもできる。
ライナー４は、注入口２１が表側を向いて畳まれ、排出口６は反対側を向いて畳まれている。そして、排出口６は、載置面１２において表側に向くように畳まれている。この様に畳まれると、ライナー４を外装容器５の底面に載置して、外装容器５の底面に設けられた排出用の孔や部材に排出口６を接続する作業が容易となる。 When the liner 4 is housed in the outer container 5, the inlet 21 and the outlet 6 can be freely positioned in the flat bag 2 as long as the inlet 21 comes upward when the outlet 6 is connected. Can be provided. Since the liner 4 has a fixed mounting surface, when the inlet 21 is provided above the flat bag 2, the inlet 21 is placed in the outer container 5 when the liner 4 is stored in the outer container and filled with liquid. Easy to locate near the center of the top. Positioning the injection port 21 in this manner is preferable because the liquid to be filled smoothly flows into the liner 4, and the liner 4 can be inflated without manual operation during filling. The discharge port 6 can also be provided in the front film 22.
The liner 4 is folded with the injection port 21 facing the front side, and the discharge port 6 is folded with the opposite side facing. And the discharge port 6 is folded up so that it may face the front side in the mounting surface 12. FIG. When folded in this manner, the operation of placing the liner 4 on the bottom surface of the outer container 5 and connecting the discharge port 6 to a discharge hole or member provided on the bottom surface of the outer container 5 is facilitated.

ライナー４に液体を充填する場合は、まず、ライナー４を注入口２１が上を向くように載置面１２を外装容器５の底面に載置して、外装容器５の底面に設けられた排出用の孔や部材に排出口６を接続する。そして、注入口２１が上方に来るように、載置面１２上にライナー４の主面を立ち上げて、液体を充填する。
液体を充填し始めると、前面フィルム２２と後面フィルム２３の間に液体が入り、注入口２１が上方に来るように、載置面１２上にライナー４の主面が立ち上っているので、直ちに載置面１２上に液体が流れ込む。載置面１２上に流れ込んだ液体は、前面フィルム２２と後面フィルム２３の間隔を広げると共に、直接挿入部２５側の三角形４２と挿入部２５，２５を外に押し出す。従って、人手をかけずに、ライナー４を膨らませながら充填することができる。 When filling the liner 4 with the liquid, first, the placement surface 12 is placed on the bottom surface of the outer container 5 so that the inlet 21 faces upward, and the discharge provided on the bottom surface of the outer container 5 is placed. The discharge port 6 is connected to a hole or member for use. Then, the main surface of the liner 4 is raised on the mounting surface 12 so that the injection port 21 comes upward, and the liquid is filled.
When the liquid starts to be filled, the liquid enters between the front film 22 and the rear film 23, and the main surface of the liner 4 rises on the mounting surface 12 so that the injection port 21 comes upward. The liquid flows on the mounting surface 12. The liquid that has flowed onto the mounting surface 12 widens the gap between the front film 22 and the rear film 23 and also directly pushes out the triangle 42 and the insertion portions 25, 25 on the insertion portion 25 side. Therefore, the liner 4 can be filled while being inflated without manpower.

そして、充填が進むにつれて、液体が挿入部２５，２５を押し出し、外装容器５の対向する側壁に密着する。挿入部２５，２５は、載置面１２からライナー４の天面に向かって押し出されていくので、充填完了時には、天面には載置面１２と同様に三角形４２が形成される。そして、重なっていた挿入部２５，２５の隅部２６，２６も少し動いて、図６に示す状態となる。 Then, as the filling proceeds, the liquid pushes out the insertion portions 25 and 25 and comes into close contact with the opposing side wall of the outer container 5. Since the insertion portions 25 and 25 are pushed out from the placement surface 12 toward the top surface of the liner 4, a triangle 42 is formed on the top surface in the same manner as the placement surface 12 when filling is completed. And the corners 26 and 26 of the insertion parts 25 and 25 which overlapped also move a little, and will be in the state shown in FIG.

以下、実施例をもって本発明を具体的に説明する。
以下の手順により、液体コンテナ用ライナーの実施例１に用いる平袋２を作製した。
内層用に厚さ１００μｍの直鎖状低密度ポリエチレン（ＬＬＤＰＥ）単層フィルムを二枚用意した。外層用に蒸着ＰＥＴ１２μｍ／ナイロン１５μｍ／ＬＬＤＰＥ８０μｍの構成からなる積層フィルムを二枚用意した。これらのフィルムは、いずれも幅２２４０ｍｍ、長さ２４６０ｍｍとした。 Hereinafter, the present invention will be specifically described with reference to examples.
The flat bag 2 used for Example 1 of the liner for liquid containers was produced by the following procedure.
Two linear low density polyethylene (LLDPE) single layer films having a thickness of 100 μm were prepared for the inner layer. Two laminated films having a constitution of vapor-deposited PET 12 μm / nylon 15 μm / LLDPE 80 μm were prepared for the outer layer. All of these films had a width of 2240 mm and a length of 2460 mm.

内装用と外装用のフィルムを一枚ずつ、ＬＬＤＰＥ面を合わせて重ねた。中心に直径１００ｍｍの孔を開け、内層用フィルム側からＰＥ製のフランジ付注入口２１の外径１００ｍｍの筒部を挿入し、上からリング状のインパルスヒータでフランジと二枚のフィルムを１０ｍｍ幅に溶着して前面フィルム２２を作製した。
注入口２１と同様な排出口６を二枚のフィルムの幅の中心線に沿って下から５２０ｍｍの位置に筒部の中心を合わせて溶着したこと以外は、前面フィルム２２と同様にして後面フィルム２３を作製した。 The interior and exterior films were stacked one by one with the LLDPE surface aligned. A hole with a diameter of 100 mm is made in the center, a cylindrical portion with an outer diameter of 100 mm of the PE flanged inlet 21 is inserted from the inner layer film side, and a flange and two films are 10 mm wide from above with a ring-shaped impulse heater. A front film 22 was prepared by welding.
The rear film is the same as the front film 22 except that the discharge port 6 similar to the inlet 21 is welded along the center line of the width of the two sheets with the center of the cylinder portion aligned at a position of 520 mm from the bottom. 23 was produced.

前面フィルム２２と後面フィルム２３を、注入口２１が表側、排出口６が裏側を向くようにＬＬＤＰＥ面を合わせて重ね、四枚のフィルムの四辺をインパルスヒータで１０ｍｍ幅に溶着した。溶着した四隅の角を、直角を挟む二辺が３０ｍｍの直角二等辺三角形に切断した。切断で開口した角を１０ｍｍ幅にインパルスヒータで溶着して図１（ａ）に示す平袋２（辺の溶着部と隅の切断部は不図示）を作製した。 The front film 22 and the rear film 23 were overlapped with the LLDPE surface so that the injection port 21 faces the front side and the discharge port 6 faces the back side, and the four sides of the four films were welded to a width of 10 mm with an impulse heater. The welded corners of the four corners were cut into right-angled isosceles triangles having 30 mm on both sides sandwiching the right angle. The corners opened by cutting were welded to a width of 10 mm with an impulse heater to produce a flat bag 2 (a side welded portion and a corner cut portion are not shown) shown in FIG.

作製した平袋２の長さ２４６０ｍｍの両側辺を、前面フィルム２２と後面フィルム２３の外面が挿入部２５の内面となるように手で反転させながら、幅が９３０ｍｍとなるように収納部２４，２４に挿入して図１（ｂ）に示すライナー１を作製した。ライナー１は、収納部２４の中心付近で、平袋２の両側辺が約１７０ｍｍの幅で重なっていた。
作製したライナー１の上辺を注入口２１側に、下辺を排出口６が注入口２１側に現れるように折り返し、縦１１３０ｍｍ、横９３０ｍｍとなるようにライナー１を折り畳み、図２に示すさらに折り畳んだライナー１を作製した。 The both sides of the produced flat bag 2 having a length of 2460 mm are manually reversed so that the outer surfaces of the front film 22 and the rear film 23 become the inner surfaces of the insertion portion 25, and the storage portion 24, so that the width becomes 930 mm. The liner 1 shown in FIG. The liner 1 was overlapped with a width of about 170 mm on both sides of the flat bag 2 near the center of the storage portion 24.
The prepared liner 1 is folded so that the upper side is on the injection port 21 side and the lower side is on the side of the injection port 21, and the liner 1 is folded so that the length is 1130 mm and the width is 930 mm, and further folded as shown in FIG. Liner 1 was produced.

さらに折り畳んだライナー１を、内寸が、縦１１３０ｍｍ、横９３０ｍｍ、高さ１２２５ｍｍのパレット付外装容器５の底面に、注入口２１と排出口６が上を向くように収納した。ライナー１の下辺を立ち上げ、排出口６を内寸幅が９３０ｍｍの外装容器５の側壁下部に設けられた孔に接続した。なお、外装容器５の底面に排出口６を接続する場合は、排出口６と注入口２１の間隔を狭くして、これらの向きが異なるように折り畳めばよい。 Further, the folded liner 1 was stored on the bottom surface of the outer container 5 with a pallet having inner dimensions of 1130 mm in length, 930 mm in width, and 1225 mm in height so that the inlet 21 and the outlet 6 face upward. The lower side of the liner 1 was raised, and the discharge port 6 was connected to a hole provided in the lower part of the side wall of the outer container 5 having an inner dimension width of 930 mm. In addition, when connecting the discharge port 6 to the bottom face of the exterior container 5, the space | interval of the discharge port 6 and the injection port 21 should be narrowed, and it should fold so that these directions may differ.

外装容器５の底面において上を向いている注入口２１に充填ノズルを接続して水を充填し始めると、前面フィルム２２と後面フィルム２３の間に水が流入し、これらの間隔が広がっていった。また、流入する水により平袋２の挿入部２５，２５も外側に押し出されていった。
そして、充填が進むにつれて、挿入部２５，２５がせり出してきて、外装容器５の対向する側壁に密着した。
水を１０００リットル充填した時点で充填を終了した。挿入部２５，２５がせり出す際に、重なっていた挿入部２５，２５の隅部２６，２６も少し動いて、図３に示す状態となった。そして、ライナー１の天面は、外装容器５の容量が１０００リットルより大きいので、外装容器５の壁面の高さより約２５０ｍｍ低い位置であった。 When a filling nozzle is connected to the injection port 21 facing upward on the bottom surface of the outer container 5 to start filling with water, water flows between the front film 22 and the rear film 23, and the gap between them increases. It was. Moreover, the insertion parts 25 and 25 of the flat bag 2 were also pushed outside by the inflowing water.
As the filling proceeded, the insertion portions 25, 25 protruded and adhered to the opposing side walls of the outer container 5.
Filling was completed when 1000 liters of water was filled. When the insertion portions 25 and 25 are protruded, the corner portions 26 and 26 of the insertion portions 25 and 25 that have overlapped also slightly move, and the state shown in FIG. 3 is obtained. And since the capacity | capacitance of the exterior container 5 was larger than 1000 liters, the top | upper surface of the liner 1 was a position about 250 mm lower than the height of the wall surface of the exterior container 5. FIG.

以下の手順により、液体コンテナ用ライナーの実施例２に用いる平袋２を作製した。
折径２３００ｍｍ、長さ２４００ｍｍ、厚さ１００μｍのＬＬＤＰＥチューブを二本用意した。
一のチューブの折径の中心線に沿って上から３５０ｍｍの位置に実施例１と同様にして注入口２１を溶着して前面フィルム２２を作製した。
他のチューブの折径の中心線に沿って下から６８０ｍｍの位置に実施例１と同様にして排出口６を溶着して後面フィルム２３を作製した。 The flat bag 2 used for Example 2 of the liner for liquid containers was produced in the following procedure.
Two LLDPE tubes having a folding diameter of 2300 mm, a length of 2400 mm, and a thickness of 100 μm were prepared.
A front film 22 was produced by welding the injection port 21 in the same manner as in Example 1 at a position 350 mm from the top along the center line of the folding diameter of one tube.
A rear film 23 was produced by welding the discharge port 6 in the same manner as in Example 1 at a position of 680 mm from the bottom along the center line of the folding diameter of the other tube.

前面フィルム２２と後面フィルム２３を、注入口２１が表側、排出口６が裏側を向くように重ね、二本のチューブの四辺をインパルスヒータで１０ｍｍ幅に溶着して図４（ａ）に示す平袋２（辺の溶着部は不図示）を作製した。なお、溶着部が柔らかいので、四隅の角は、切断せずにそのまま残した。
作製した平袋２の長さ２４００ｍｍの両側辺を、実施例１と同様に幅が９３０ｍｍとなるように収納部２４，２４に挿入して図４（ｂ）に示すライナー１を作製した。ライナー１は、収納部２４の中心付近で平袋２の両側辺が約２００ｍｍの幅で重なっていた。 The front film 22 and the rear film 23 are overlapped so that the injection port 21 faces the front side and the discharge port 6 faces the back side, and the four sides of the two tubes are welded to a width of 10 mm by an impulse heater, and the flat surface shown in FIG. A bag 2 (the welded portion on the side is not shown) was produced. Since the welded part was soft, the four corners were left without being cut.
The both sides of the produced flat bag 2 having a length of 2400 mm were inserted into the storage portions 24 and 24 so that the width was 930 mm as in Example 1, thereby producing the liner 1 shown in FIG. The liner 1 was overlapped with a width of about 200 mm on both sides of the flat bag 2 near the center of the storage portion 24.

作製したライナー１の下部約５６５ｍｍを手前（紙面上方）に向けてＪ字状に曲げて、後面フィルム２３に谷折りの折り癖をつけた。曲げた部分の前面フィルム２２を平に戻しつつ、平袋２の挿入部２５を広げて開口させた。開口面を向いている挿入部２５の前面フィルム２２と後面フィルム２３の溶着部の長さ方向の中央付近を摘んで開口面に引き出した。挿入部２５の前面フィルム２２と後面フィルム２３を開口面に引き出したまま、前面フィルム２２の主面と後面フィルム２３の主面を山折りした。
この様にしてライナー１を、図５（ａ）のライナー３の状態とした。ライナー３には、摘んで引き出された前面フィルム２２と後面フィルム２３が膨出部４１，４１として形成されていた。ライナー３の状態から、さらに押し潰して完全に畳むと、載置面１２が形成されて折り畳まれた図５（ｂ）に示すライナー４が得られた。載置面１２の下（内側）には、膨出部４１，４１が折り畳まれている。 About 565 mm of the lower part of the produced liner 1 was bent in a J shape toward the front (upward on the paper surface), and valley folds were attached to the rear film 23. The insertion portion 25 of the flat bag 2 was widened and opened while the bent front film 22 was returned to a flat shape. The front film 22 of the insertion portion 25 facing the opening surface and the vicinity of the center in the length direction of the welded portion of the rear film 23 were picked and pulled out to the opening surface. The main surface of the front film 22 and the main surface of the rear film 23 were folded in a mountain while the front film 22 and the rear film 23 of the insertion portion 25 were drawn out to the opening surface.
In this way, the liner 1 was changed to the state of the liner 3 in FIG. On the liner 3, the front film 22 and the rear film 23 which are picked and pulled out are formed as the bulging portions 41 and 41. When the liner 3 was further crushed and completely folded from the state of the liner 3, the placing surface 12 was formed and the liner 4 shown in FIG. 5B was obtained. The bulging parts 41 and 41 are folded under the mounting surface 12 (inside).

注入口２１を接続する孔が底面の内寸９３０ｍｍの辺近傍に設けられたこと以外は、実施例１で用いたものと同様な外装容器５の底面に、注入口２１が上を向くように載置面１２を下にして収納した。収納したライナー４の排出口６を外装容器５の底面に設けられた孔に接続した。なお、外装容器５の側壁下部に排出口６を接続する場合は、排出口６と注入口２１の間隔を狭くして、Ｊ字状に折り曲げる方向を前面フィルム２２側（紙面裏側）にして、これらの向きが同じになるように折り畳めばよい。 Except that a hole for connecting the injection port 21 is provided in the vicinity of the side having an inner dimension of 930 mm on the bottom surface, the injection port 21 faces upward on the bottom surface of the outer container 5 similar to that used in Example 1. It was stored with the mounting surface 12 facing down. The outlet 6 of the accommodated liner 4 was connected to a hole provided on the bottom surface of the outer container 5. In addition, when connecting the discharge port 6 to the side wall lower part of the exterior container 5, the space | interval of the discharge port 6 and the injection port 21 is made narrow, and the direction bent in J shape is made into the front film 22 side (paper surface back side), Folding so that these directions are the same.

外装容器５内において注入口２１が上方に来るように、載置面１２上にライナー４の側辺１１，１１を立ち上げた。この状態で充填ノズルを接続し、そのまま水を充填し始めると、前面フィルム２２と後面フィルム２３の間に水が流入し、これらの間隔が広がっていった。そして、流入する水により平袋２の挿入部２５，２５が自然と外側に押し出されていった。充填が進むにつれて、挿入部２５，２５がせり出してきて、外装容器５の対向する側壁に密着した。
水を１０００リットル充填した時点で充填を終了した。挿入部２５，２５がせり出す際に、重なっていた挿入部２５，２５の隅部２６，２６も少し動いて、図６に示す状態となった。ただし、ライナー４の天面は、外装容器５の容量が１０００リットルより大きいので、外装容器５の壁面の高さより約２５０ｍｍ低い位置であった。 The side edges 11 and 11 of the liner 4 were raised on the mounting surface 12 so that the injection port 21 came upward in the outer container 5. When the filling nozzle was connected in this state and the filling of water was started as it was, water flowed in between the front film 22 and the rear film 23, and the interval between them increased. And the insertion parts 25 and 25 of the flat bag 2 were naturally pushed outside by the inflowing water. As the filling proceeded, the insertion portions 25 and 25 protruded and adhered to the opposing side walls of the outer container 5.
Filling was completed when 1000 liters of water was filled. When the insertion portions 25 and 25 protrude, the corner portions 26 and 26 of the insertion portions 25 and 25 that overlap each other also move slightly, and the state shown in FIG. 6 is obtained. However, the top surface of the liner 4 was lower by about 250 mm than the height of the wall surface of the outer container 5 because the capacity of the outer container 5 was larger than 1000 liters.

以上、本発明を好適な実施の形態に基づき説明したが、本発明は、これに限定されることなく種々の変更が可能である。
例えば、形態例２のライナー４においては、載置面が後面フィルムと同じ側となるように畳んだが、前面フィルムと同じ側となるように畳んでもよい。具体的には、形態例２のライナー４を形成した後に載置面を反対側に反転させたり、形態例２のライナー４を形成するためにライナー１の下部をＪ字状に折り曲げるに際し、前面フィルムに谷折りの折り癖をつけて畳んだりすればよい。この様に畳むと、注入口と共に、排出口がライナーの下部において表側を向くので、外装袋で個包装した時に、前面フィルムや後面フィルムが傷付きにくい。そして、個包装品または未包装品を段ボール箱等で集合包装する場合に、効率よく包装できる。
また、載置面と同様に畳んで、ライナーの上部に載置面と同様な天面を形成してもよい。この場合は、注入口が天面において表側に向くように畳むことが好ましい。 While the present invention has been described based on the preferred embodiments, the present invention is not limited to this, and various modifications can be made.
For example, in the liner 4 of the second embodiment, the mounting surface is folded so as to be on the same side as the rear film, but may be folded so as to be on the same side as the front film. Specifically, after the liner 4 of the second embodiment is formed, the mounting surface is reversed to the opposite side, or when the lower portion of the liner 1 is folded into a J shape to form the liner 4 of the second embodiment, You can fold the film with valley folds. When folded in this way, the discharge port faces the front side at the bottom of the liner together with the injection port, so that the front film and the rear film are not easily damaged when individually packaged with an outer bag. Then, when individually packaged products or unpackaged products are collectively packaged in a cardboard box or the like, it can be packaged efficiently.
Further, the top surface similar to the placement surface may be formed on the upper portion of the liner by folding the same as the placement surface. In this case, it is preferable to fold the inlet so that the inlet is directed to the front side.

１…本発明のライナー、１１…ライナーの側辺、１１ａ…前面フィルムの折り線、１１ｂ…後面フィルムの折り線、１２…ライナーの載置面、１３…載置面の側辺、１４…ライナーの側壁、２…本発明のライナーとなる平袋、２１…注入口、２２…前面フィルム、２３…後面フィルム、２４…収納部、２５…挿入部、２６…挿入部の隅部、２７…隅部を頂点とする三角形、３…側辺の一部を広げた本発明のライナー、４…載置面が形成された本発明のライナー、４１…前面フィルムと後面フィルムの膨出部、４２…膨出部を底辺とする三角形、５…外装容器、６…排出口。 DESCRIPTION OF SYMBOLS 1 ... Liner of this invention, 11 ... Side of liner, 11a ... Folding line of front film, 11b ... Folding line of rear film, 12 ... Placement surface of liner, 13 ... Side of placement surface, 14 ... Liner 2 ... Flat bag as liner of the present invention, 21 ... Inlet port, 22 ... Front film, 23 ... Rear film, 24 ... Storage part, 25 ... Insertion part, 26 ... Corner of insertion part, 27 ... Corner Triangles with apexes at the top, 3 ... Liner of the present invention in which a part of the side is expanded, 4 ... Liner of the present invention on which a mounting surface is formed, 41 ... Swelled part of front film and rear film, 42 ... A triangle with the bulging portion as the base, 5 ... an exterior container, 6 ... a discharge port.

Claims

A liner consisting of a square flat bag in which a front film having an inlet and an opening side of a rear film that overlaps the front film are welded to form a storage portion,
A liner characterized in that two opposite sides of the flat bag are inverted and are inserted and folded so as to approach or contact each other in the center of the storage portion of the flat bag.

When the two opposite sides of the flat bag are reversed, a part of the overlap of the fold lines of the front film and the rear film formed on the left and right ends is widened so that the fold lines of the front film and the fold lines of the rear film are The liner according to claim 1, wherein a placement surface on the bottom surface of the outer container is formed by being crushed and folded so as to overlap.

The liner according to claim 1 or 2, wherein at least one corner of a portion inserted in an inverted manner in the storage portion of the flat bag is cut and removed and sealed by welding.

The liner according to claim 1, wherein a discharge port is welded to the rear film.

The liner according to any one of claims 1 to 4, wherein the front film and the rear film are stacked without bonding a plurality of films.

The liner according to any one of claims 1 to 5, wherein the flat bag is formed by welding two sides opened by a tubular film.

The liner according to any one of claims 1 to 6, wherein the flat bag is formed by welding four sides of a pair of the front film and the rear film.