JP2013006611A - Interior bag, and method for manufacturing the same - Google Patents

Interior bag, and method for manufacturing the same Download PDF

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JP2013006611A
JP2013006611A JP2011140213A JP2011140213A JP2013006611A JP 2013006611 A JP2013006611 A JP 2013006611A JP 2011140213 A JP2011140213 A JP 2011140213A JP 2011140213 A JP2011140213 A JP 2011140213A JP 2013006611 A JP2013006611 A JP 2013006611A
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cylindrical body
layer material
top plate
interior bag
bottom plate
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JP5973698B2 (en
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Tetsuya Kawada
鉄也 河田
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Nisshin Sansho Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a synthetic resin-made interior bag that is improved in strength so that the interior bag is not broken inside an exterior container nor leaks a stored material inside the exterior container even when the exterior container is subjected to a strong impact such as falling.SOLUTION: The interior bag 1 is configured such that: end members constituted of a top board 3 with a cylindrical opening 7 and a bottom board 4 are joined to upper and lower ends of a cylindrical barrel 2 to close the barrel, and whole members have flexibility; welding pieces 8, 9 to be welded to the cylindrical barrel 2 are respectively combined around the top board 3 and the bottom board 4 in a vertical direction; the cylindrical barrel 2 has a double structure constituted of an inner layer material and an outer layer material that are different in material properties such as elongation rate and impact resistance; and welding pieces 8, 9 of the top board 3 and the bottom board 4 are respectively welded while being interposed between the inner layer material and the outer layer material.

Description

この発明は、外装容器内に収納される可撓性を有する内装袋に関し、さらに詳しくは、外装容器に外部から加えられる衝撃に対しても破損したりすることのないように強度が向上した内装袋に関するものである。   The present invention relates to a flexible interior bag stored in an exterior container, and more specifically, an interior having improved strength so as not to be damaged by an external impact applied to the exterior container. It relates to bags.

例えば、保形部材となるドラム缶等の比較的剛性のある外装容器の内側に装着し、その内部に各種液体や粉体を収納し、これらの保存や輸送を行う可撓性の内装容器として合成樹脂製の内装袋が使用されている。   For example, it is mounted inside a relatively rigid outer container such as a drum can as a shape-retaining member, and various liquids and powders are stored inside it and synthesized as a flexible inner container for storing and transporting them. Resin-made interior bags are used.

内装袋の使用により、外装容器の内壁に収納物が直接接触しないので、収納物を取り出した後、内装袋を外装容器から取り出せば、外装容器の内壁は収納物により汚染されておらず、使用後の外装容器内部を洗浄することなく、再び他の内装袋を装着することで、他の種類の収納物でもそのまま続けて収納することができる。   Use of the inner bag prevents the stored items from coming into direct contact with the inner wall of the outer container, so if the inner bag is taken out of the outer container after removing the stored item, the inner wall of the outer container is not contaminated by the stored items. By installing another interior bag again without washing the interior of the subsequent outer container, other types of stored items can be stored as they are.

上記のような内装袋は、熱可塑性合成樹脂シートを用いた筒状胴部の上下端に同じく熱可塑性合成樹脂製シートからなる天板と底板を溶着することでクローズ状の内装袋を成形するようにしていた。   The interior bag as described above forms a closed interior bag by welding a top plate and a bottom plate, which are also made of a thermoplastic synthetic resin sheet, to the upper and lower ends of a cylindrical body using a thermoplastic synthetic resin sheet. It was like that.

出願人は、先に、熱可塑性合成樹脂を用いた筒状体の下半部を内側に折り返して二重筒に形成し、この二重筒における内側筒及び外側筒の上端部をそれぞれ径方向の内側に向かう折り曲げ部とし、内側筒の折り曲げ部上に熱可塑性合成樹脂を用いた底板の周囲を重ね、外側筒の折り曲げ部上に熱可塑性合成樹脂を用いた天板の周囲を重ね、上記底板と外側筒の折り曲げ部の間に非溶着材を介在させた状態で、上記外側筒の折り曲げ部と天板及び内側筒の折り曲げ部と底板のそれぞれの重なり部分を周方向の全長にわたって同時に加熱溶着し、この溶着後に、天板に設けた筒口から上記非溶着材を抜き取る構成を採用することで、筒状胴部の上端側と下端側を閉鎖する溶着処理を同時に行うことで、クローズ状の袋体を得ることができる製造方法を提供した(特許文献1参照)。   The applicant first forms the double cylinder by folding the lower half of the cylindrical body using the thermoplastic synthetic resin inward, and the upper ends of the inner cylinder and the outer cylinder in the double cylinder are each in the radial direction. The bent portion toward the inside of the inner cylinder, the periphery of the bottom plate using the thermoplastic synthetic resin is superimposed on the bent portion of the inner cylinder, the periphery of the top plate using the thermoplastic synthetic resin is overlapped on the bent portion of the outer cylinder, While the non-welding material is interposed between the bent portion of the bottom plate and the outer tube, the overlapping portions of the bent portion of the outer tube and the top plate and the bent portion of the inner tube and the bottom plate are simultaneously heated over the entire length in the circumferential direction. By adopting a configuration in which the non-welding material is removed from the tube opening provided on the top plate after welding and by performing a welding process for closing the upper end side and the lower end side of the cylindrical body portion in a closed shape. Manufacturing method that can obtain the bag body of And it provided (see Patent Document 1).

上記特許文献1の発明により、筒状胴部の上端側と下端側を閉鎖する溶着処理を行うことで、両端部を端部材で閉鎖したクローズ状の内装袋が得られるようになった。   According to the invention of the above-mentioned Patent Document 1, by performing a welding process for closing the upper end side and the lower end side of the cylindrical body portion, a closed interior bag having both end portions closed with end members can be obtained.

ところで、内装袋は、その寸法や形状がドラム缶等の外装容器の内部空間に一致していないと、例えば上下寸法が外装容器の内部高さより短いと、内装袋が外装容器の内部で落ち込んでしまい、直径(幅)が小さいと外装容器の上部開口にセットできなくなり、逆に、内装袋の寸法が外装容器の内部空間より大きいと、外装容器内で内装袋に皺が発生し、皺により収納物の本来の容量を減らしてしまったり、皺の間に収納物が貯まり、完全に取り出すことが出来なくなる等の問題がある。   By the way, if the size and shape of the interior bag does not match the internal space of the outer container such as a drum can, for example, if the vertical dimension is shorter than the inner height of the outer container, the inner bag falls inside the outer container. If the diameter (width) is small, it cannot be set in the upper opening of the outer container. Conversely, if the size of the inner bag is larger than the inner space of the outer container, wrinkles are generated in the outer bag and stored in the outer bag. There are problems such as reducing the original capacity of the object and storing things between the baskets, making it impossible to remove them completely.

よって、内装袋の形状、寸法は、使用される外装容器の内部空間の形状、寸法に合わせた形状、寸法に作られており、外装容器内にセットされた場合、内装袋は皺無くぴったりと外装容器の内壁に接するようになる。   Therefore, the shape and dimensions of the inner bag are made according to the shape and dimensions of the inner space of the outer container used, and when it is set in the outer container, the inner bag is perfectly fit. It comes in contact with the inner wall of the outer container.

特許第3723540号公報Japanese Patent No. 3723540

以上、日本国内においては、上記のように外装容器に内装袋を使用するのが主流となっているが、諸外国においては、内装袋を使用せず、ドラム缶等の外装容器に直接収納物を収納することを主流とする地域もあり、これらの地域においては、使用後に外装容器を直接水洗い等で収納物の残渣を洗い出し、その後新たな収納物を収納する等で使用されている。   As described above, in Japan, it is the mainstream to use an interior bag as described above. However, in other countries, the interior bag is not used and the items stored directly in the exterior container such as a drum can are used. There are some areas where the mainstream is storage, and in these areas, the exterior container is directly rinsed with water after use, and then used to store new storage items.

しかし最近、これらの地域においても、外装容器の洗浄による土壌の汚染、汚濁の問題がクローズアップされてきており、環境問題意識の高まりから、今後は外装容器の洗浄を伴わなくてもよい内装袋を使用することが、世界的になされていくものと考えられる。   However, recently, in these areas, the problem of soil contamination and pollution caused by washing outer containers has been highlighted. Due to the growing awareness of environmental issues, it is no longer necessary to wash outer containers in the future. The use of is considered to be made worldwide.

ところで、外装容器の保管や使用、運搬方法は世界各地域で千差万別であり、外装容器を船から地面に落として降ろしたり、また、事故等により高さのある場所から外装容器が落下するような環境で使用される場合もある。   By the way, storage, use, and transportation methods of exterior containers are various in various regions of the world. The exterior containers are dropped from the ship by dropping them on the ground, or the exterior containers are dropped from a high place due to an accident or the like. It may be used in such an environment.

外装容器が底面と側面の境目の角部分から地面に落下した場合、ドラム缶等の鉄製の外装容器であれば、外装容器の底面と側面の境目の角部分にへこみが生じる。一方、底面が地面とほぼ水平状態で落下した場合、落下直後に収納物が外側に広がり外装容器を横方向に押し広げ、この圧力により外装容器は横方向に膨張する。これは一瞬で生じる現象であるが、スローモーションで確認すると、落下の衝撃の大きさにもよるが、外装容器が横方向にかなり膨張するのがわかる。   When the outer container falls to the ground from the corner portion of the boundary between the bottom surface and the side surface, if it is an iron outer container such as a drum can, a dent is generated at the corner portion of the boundary surface between the bottom surface and the side surface of the outer container. On the other hand, when the bottom surface is dropped in a state of being almost horizontal with the ground, immediately after the fall, the stored item spreads outside and pushes the outer container laterally, and this pressure causes the outer container to expand laterally. Although this is a phenomenon that occurs in an instant, it can be seen in slow motion that the outer container expands considerably in the lateral direction, depending on the magnitude of the impact of the drop.

そのため、ドラム缶等の外装容器については、落下試験が行われ、所定の高さから落下しても、外装容器に破損が生じて収納物が流出しないようになっている。   Therefore, a drop test is performed on an outer container such as a drum can, and even if the outer container is dropped from a predetermined height, the outer container is damaged and the stored items do not flow out.

ところが、内装袋を内部に装着した外装容器の場合、鉄製のドラム缶等が底面が地面と水平で落下した際の外装容器の横方向の膨張に伴い、内装袋も横方向に膨張するが、合成樹脂製の内装袋は、ある限度を超えると、内装袋に膨張による加わる引っ張り力により破れて破損してしまうことがある。   However, in the case of an exterior container with an interior bag inside, the interior bag also expands in the lateral direction as the exterior container expands in the lateral direction when the bottom of the iron drum can falls horizontally with the ground. If a resin-made interior bag exceeds a certain limit, it may be broken and damaged by a tensile force applied to the interior bag due to expansion.

また、衝撃力は筒状胴部と天板や底板とを接合する溶着部分にも加わり、この溶着部分が衝撃による引っ張り力で引き剥がされてしまい、筒状胴部と天板や底板との境目に亀裂が生じてしまうこともある。   In addition, the impact force is also applied to the welded part that joins the cylindrical body part to the top plate or the bottom plate, and this welded part is peeled off by the tensile force due to the impact, and the tubular body part and the top plate or the bottom plate are separated. Cracks may occur at the boundaries.

たとえ外装容器が落下により破損しなくとも、内部で内装袋が破損や亀裂が生じてしまうと、収納物が内装袋の破損・亀裂箇所から外装容器に内部に流出してしまい、外装容器の内壁を汚染してしまうので、外装容器に内装袋を装着することで、使用後に内部を洗浄することなく続けて使用できるという、内装袋を使用する意義が失われてしまう。   Even if the exterior container is not damaged due to falling, if the interior bag breaks or cracks inside, the stored item will flow into the exterior container from the damaged / cracked portion of the interior bag, and the inner wall of the exterior container Therefore, by attaching the inner bag to the outer container, the significance of using the inner bag, which can be used continuously without washing the inside after use, is lost.

この発明は、上記のような課題を解決し、外装容器に落下等の強い衝撃が与えられても、内装袋や溶着箇所で破損や亀裂を生じず、収納物を外装容器の内部で漏らすようなことのない強度を向上させた合成樹脂製の内装袋を提供することを課題とする。   This invention solves the above-mentioned problems, and even if a strong impact such as dropping is given to the outer container, the inner bag and the welded portion are not damaged or cracked, and the stored item is leaked inside the outer container. It is an object of the present invention to provide a synthetic resin-made interior bag with improved strength.

上記のような課題を解決するため、請求項1の発明は、外装容器内に収納されて使用され、筒状胴部の上下端に筒口付き天板と底板とからなる端材を接合して閉鎖され全体が可撓性を有する内装袋において、天板と底板の周囲に筒状胴部と溶着される溶着片を垂直方向に連成しており、筒状胴部が伸び率や耐衝撃性などの材質の特性が相違する内層材と外層材の二重構造で、内層材と外層材との間に前記天板や底板の溶着片を挟み込んで溶着されていることを特徴とする内装袋である。   In order to solve the above-described problems, the invention of claim 1 is used by being housed in an outer container, and joining the end material composed of the top plate with the bottom and the bottom plate to the upper and lower ends of the cylindrical body. In an interior bag that is closed and flexible as a whole, the welded piece to be welded to the cylindrical body is formed in the vertical direction around the top and bottom plates, and the tubular body is stretched and impact resistant. The interior is characterized in that the inner layer material and the outer layer material have different properties such as properties, and the top plate and the bottom plate are sandwiched between the inner layer material and the outer layer material. It is a bag.

なお、この発明の場合、天板や底板の溶着片より内側に位置する筒状体を内層材、天板や底板の溶着片より外側に位置する筒状体を外層材としており、内層材又は外層材のそれぞれが必ずしも一層の筒状体である必要はなく、二層以上の多層構造であってもよい。   In the case of this invention, the cylindrical body located inside the welding piece of the top plate and the bottom plate is the inner layer material, the cylindrical body located outside the welding piece of the top plate and the bottom plate is the outer layer material, Each of the outer layer materials is not necessarily a single-layered cylindrical body, and may have a multilayer structure of two or more layers.

請求項2の発明は、上記請求項1に記載の内装袋において、筒状胴部の上端付近の外周に、筒状胴部と略同径でかつ筒状胴部より上下寸法の短い筒状体を、その上部を前記天板と筒状胴部とを接合する溶着部分にて溶着して外装容器への引っ掛け用の係合片を形成した構成を採用する。   According to a second aspect of the present invention, in the interior bag according to the first aspect, a cylindrical shape having a diameter substantially the same as that of the cylindrical body portion and having a shorter vertical dimension than the cylindrical body portion on the outer periphery near the upper end of the cylindrical body portion. A structure is adopted in which the upper part of the body is welded at a welded portion where the top plate and the cylindrical body part are joined to form an engaging piece for hooking to the outer container.

請求項3の発明は、上記請求項1又は2項に記載の内装袋において、天板にその周縁部に達しない部分的に凸部又は/及び凹部を筒口の部分を避けて設け、底板にその周縁部に達しない部分的に凹部を設けた構成を採用する。   According to a third aspect of the present invention, in the interior bag according to the first or second aspect, the top plate is provided with a convex portion or / and a concave portion that does not reach the peripheral edge of the top plate, avoiding the tube opening portion, and is provided on the bottom plate. The structure which provided the recessed part partially which does not reach the peripheral part is employ | adopted.

請求項4の発明は、上記請求項1に記載の内装袋の製造方法であって、筒状胴部の一方端に筒状胴部と略同径の円板状の鏝台を内側から嵌めておいて、底板の溶着片を筒状胴部の一方端の外層材と内層材の間に挿入してから鏝により鏝台上の内層材、溶着片、外層材の溶着を行い筒状胴部と底板を一体化し、次に、筒状胴部の他方端に筒状胴部の直径と略同径の直径のリング状とこのリングの対向2カ所で折り曲げて重ねた弓状とに変換自在となる治具をリング状にして嵌めておいて、天板の溶着片を筒状胴部の他方端の外層材と内層材の間に挿入してから鏝により鏝台上の内層材、溶着片、外層材の溶着を行い筒状胴部と天板を一体化し、その後、治具をリング状から弓状に変換して、天板の筒口から弓状の治具を外側に取り出すことを特徴とする内装袋の製造方法である。   Invention of Claim 4 is a manufacturing method of the interior bag of said Claim 1, Comprising: The disk-shaped saddle | cabinet which is substantially the same diameter as a cylindrical trunk | drum from one side of a cylindrical trunk | drum is fitted from the inner side. The welded piece of the bottom plate is inserted between the outer layer material and the inner layer material at one end of the cylindrical body part, and then the inner layer material, the welded piece, and the outer layer material on the base are welded by the scissors. Next, it is converted into a ring shape with a diameter approximately the same as the diameter of the cylindrical body and an arcuate shape that is folded and overlapped at two opposite positions on the other end of the cylindrical body. Insert the jig that becomes free in a ring shape, insert the welding piece of the top plate between the outer layer material and the inner layer material on the other end of the cylindrical body part, and then the inner layer material on the table with the scissors, The welding piece and outer layer material are welded to integrate the cylindrical body and the top plate, and then the jig is converted from a ring shape to a bow shape, and the bow-shaped jig is taken out from the top port of the top plate. Special It is a manufacturing method of the interior bag and.

この発明の請求項1に記載の内装袋においては、筒状胴部と天板、筒状胴部と底板、それぞれの溶着箇所において内層材と外層材の特性の違う材質が一体化しており、それぞれの材質の持つ優劣を補完し合い、衝撃力をそれぞれの材質の特性により緩和し、突発的な衝撃に対して強い内装袋となる。   In the interior bag according to claim 1 of the present invention, the cylindrical body portion and the top plate, the cylindrical body portion and the bottom plate, the materials having different characteristics of the inner layer material and the outer layer material are integrated at the respective welding locations, Complementing the superiority and inferiority of each material, the impact force is relaxed by the characteristics of each material, and it becomes an interior bag that is strong against sudden impact.

また、溶着箇所を天板及び底板と一体の溶着片を、筒状胴部が内層材と外層材で挟んで少なくとも3層構造にて溶着しているため、内装袋の内側からの衝撃力が加わって内層材の溶着面が引っ張られても、溶着部分が厚み方向に深く、溶着部分の亀裂が生じにくく、更に、天板又は底板の溶着片が緩衝材となり、外層材の溶着面にかかる衝撃は減少しているので溶着部分は破損されずに保たれることになる。   In addition, since the welded part is welded in at least a three-layer structure with a welded piece integral with the top plate and the bottom plate, and the cylindrical body is sandwiched between the inner layer material and the outer layer material, the impact force from the inside of the interior bag is reduced. In addition, even if the weld surface of the inner layer material is pulled, the weld portion is deep in the thickness direction, and the weld portion is not easily cracked. Since the impact is reduced, the welded part is kept intact.

また、請求項2に記載の内装袋によれば、筒状胴部の上端部外側に短い筒状体を装着して形成した係合片をドラム缶等の外装容器上部に引っ掛けることにより内装袋の脱落防止となる。   Moreover, according to the interior bag of claim 2, the engagement piece formed by attaching a short tubular body outside the upper end of the tubular body is hooked on the upper part of the outer container such as a drum can. Prevents falling off.

また、請求項3に記載の内装袋によれば、内装袋が装着され収納物を収納した状態の外装容器が落下した際、外装容器の膨張に伴い内装袋が横方向に膨張して、天板の基準平面と凸部(凹部)とに横方向への引っ張り力が加えられた際に、凸部(凹部)と基準平面の段差部分が、垂直から斜め方向になることで基準平面と凸部(凹部)が横方向に引っ張られる際の緩衝材の役割を果たし、その結果、内装袋に加わる引っ張り力による破損を防ぐことができ、構造的にもより耐衝撃性の高い内装袋となる。   According to the interior bag of the third aspect, when the exterior container with the interior bag attached and storing the storage item falls, the interior bag expands in the lateral direction as the exterior container expands, When a lateral pulling force is applied to the reference plane and convex part (concave part) of the plate, the level difference between the convex part (concave part) and the reference plane changes from the vertical to the diagonal direction. It acts as a cushioning material when the part (concave part) is pulled in the lateral direction, and as a result, it is possible to prevent breakage due to the pulling force applied to the interior bag, resulting in an interior bag that is structurally more shock resistant. .

さらに、請求項4に記載の内装袋の製造方法によれば、二層構造の筒状胴部と、溶着片付きの天板及び底板を溶着することができ、請求項1乃至3に記載された内装袋を容易に製造することができる。   Furthermore, according to the manufacturing method of the interior bag of Claim 4, the cylindrical trunk | drum of a two-layer structure, the top plate and bottom plate with a welding piece can be welded, It was described in Claims 1 thru | or 3. An interior bag can be manufactured easily.

この発明の内装袋の斜視図である。It is a perspective view of the interior bag of this invention. (a)(b)はこの発明の内装袋の筒状胴部の構成を示す斜視図である。(A) (b) is a perspective view which shows the structure of the cylindrical trunk | drum of the interior bag of this invention. この発明の内装袋の天板、底板、係止片を示す斜視図である。It is a perspective view which shows the top plate, bottom plate, and locking piece of the interior bag of this invention. この発明の内装袋の製造に用いる治具を示す斜視図である。It is a perspective view which shows the jig | tool used for manufacture of the interior bag of this invention. (a)(b)(c)はこの発明の内装袋の製造方法を示す概要図である。(A) (b) (c) is a schematic diagram which shows the manufacturing method of the interior bag of this invention. (d)(e)(f)はこの発明の内装袋の製造方法を示す概要図である。(D), (e), and (f) are schematic views showing the method for manufacturing the interior bag of the present invention. (g)(h)はこの発明の内装袋の製造方法を示す概要図である。(G) (h) is a schematic diagram showing a method for manufacturing an interior bag of the present invention. (i)(j)(k)はこの発明の内装袋の製造方法を示す概要図である。(I) (j) (k) is a schematic diagram showing a method for manufacturing an interior bag according to the present invention. (l)(m)はこの発明の内装袋の製造方法を示す概要図である。(L) (m) is a schematic diagram showing a method for producing an interior bag according to the present invention. (n)(o)(p)はこの発明の内装袋の製造方法を示す概要図である。(N) (o) (p) is a schematic diagram showing a method for producing an interior bag of the present invention. この発明の内装袋の製造方法を示す一部拡大断面図である。It is a partially expanded sectional view which shows the manufacturing method of the interior bag of this invention. この発明の内装袋の製造に用いる治具で、(a)は斜視図、(b)は底面図、(c)は折り畳み状態の斜視図である。It is a jig | tool used for manufacture of the interior bag of this invention, (a) is a perspective view, (b) is a bottom view, (c) is a perspective view of a folded state. この発明の内装袋の製造方法を示す一部拡大断面図である。It is a partially expanded sectional view which shows the manufacturing method of the interior bag of this invention. この発明の第2の実施形態の内装袋を示す平面図である。It is a top view which shows the interior bag of 2nd Embodiment of this invention. この発明の第2の実施形態の内装袋の斜視図である。It is a perspective view of the interior bag of 2nd Embodiment of this invention. この発明の第3の実施形態の内装袋の製造方法を示す一部拡大断面図である。It is a partially expanded sectional view which shows the manufacturing method of the interior bag of 3rd Embodiment of this invention. この発明の第4の実施形態の内装袋の製造方法を示す一部拡大断面図である。It is a partially expanded sectional view which shows the manufacturing method of the interior bag of 4th Embodiment of this invention.

以下、この発明の実施の形態を図示例と共に説明する。
図1は、この発明の合成樹脂製の第1の実施形態の内装袋1を示すものである。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an interior bag 1 according to a first embodiment made of a synthetic resin of the present invention.

内装袋1は、所定の長さに切断した筒状胴部2の上端部及び下端部に、天板3及び底板4を取り付けて全体をクローズ状に密閉化されたものである。   The interior bag 1 has a top plate 3 and a bottom plate 4 attached to an upper end portion and a lower end portion of a cylindrical body portion 2 cut to a predetermined length, and the whole is closed and sealed.

前記筒状胴部2は、図2(a)(b)に示すように、インフレーション法などにより筒状に形成された、それぞれ材質が異なる材料からなる2つの熱収縮性合成樹脂の筒状体を内層材5と外層材6として重ねた二重構造としてあり、この実施形態では一例として内層材5はPEチューブ、外層材6はPE/Ny/PEチューブを用いている。   As shown in FIGS. 2 (a) and 2 (b), the cylindrical body portion 2 is formed into a cylindrical shape by an inflation method or the like, and is a cylindrical body of two heat-shrinkable synthetic resins made of different materials. In this embodiment, the inner layer material 5 uses a PE tube and the outer layer material 6 uses a PE / Ny / PE tube as an example.

PE(ポリエチレンフィルム)チューブは、ポリオレフィンの一種で、フィルムの素材としては最も多く利用されている。構造や密度の違いにより、高密度(HDPE)、中密度(MDPE)、低密度(LDPE)、リニア低密度(L−LDPE)、メタロセン触媒系リニア低密度(mL−LDPE)など多岐にわたって区分され、それぞれが比較的安価で、ヒートシール性に優れ、加工も容易なため幅広く使われており、この実施形態では内層材5として使用される。   A PE (polyethylene film) tube is a kind of polyolefin and is most often used as a material for a film. Depending on the structure and density, it is classified into various categories such as high density (HDPE), medium density (MDPE), low density (LDPE), linear low density (L-LDPE), and metallocene catalyst linear low density (mL-LDPE). These are comparatively inexpensive, excellent in heat sealability and easy to process, and thus are widely used. In this embodiment, they are used as the inner layer material 5.

一方、NY(ナイロンを主原料とした二軸延伸のナイロンフィルム)は、タフネス性・耐ピンホール性に優れており、液体包装・ボイル・レトルト食品等、食品・非食品の包装用途に幅広く使用されており、この実施形態ではこれをPEと組み合わせたものを外層材6として使用している。   On the other hand, NY (biaxially stretched nylon film made mainly of nylon) has excellent toughness and pinhole resistance, and is widely used for packaging of food and non-food products such as liquid packaging, boil, and retort food. In this embodiment, a combination of this and PE is used as the outer layer material 6.

天板3と底板4は、図3に示すような形状であり、中央部に内装袋に収納物を収納するために内部と導通する筒口7を中央部寄りに設けている天板3は、天板3より大きな円板状シートを中心に天板3の形状を残して周囲を加熱等により収縮させるなどして天板3に対して垂直方向に下方へ突出する溶着片8が天板3の全周囲にわたって形成され、また底板4についても天板3と同様に、底板4より大きな円板状シートを中心に底板3の形状を残して周囲を加熱等により収縮させるなどして底板4に対して垂直方向に上方に立ち上がる溶着片9が底板4の全周囲にわたって形成されている。   The top plate 3 and the bottom plate 4 are shaped as shown in FIG. 3, and the top plate 3 provided with a cylindrical port 7 that is electrically connected to the inside in order to store the stored items in the interior bag at the center, A welding piece 8 that protrudes downward in the vertical direction with respect to the top plate 3 by, for example, contracting the periphery of the top plate 3 by heating or the like while leaving the shape of the top plate 3 around a disc-shaped sheet larger than the top plate 3 is provided. In the same way as the top plate 3, the bottom plate 4 is also formed on the bottom plate 4 by leaving the shape of the bottom plate 3 around the disk-like sheet larger than the bottom plate 4 and contracting the periphery by heating or the like. On the other hand, a welding piece 9 rising upward in the vertical direction is formed over the entire periphery of the bottom plate 4.

前記筒状胴部2と天板3との接合は、二層構造の筒状胴部2の内層材5と外層材6との間に天板3の溶着片8を挟み、内層材5及び外層材6の上端が天板3付近に達した状態で接着するが、この実施例の内装袋1の場合、更に天板3付近には、図3で示すような、筒状胴部2とほぼ同じ直径の筒状で、寸法は数cm〜数十cm程度の係合片10が、外層材6の外側を覆うように設けてある。   The cylindrical body 2 and the top plate 3 are joined by sandwiching the welding piece 8 of the top plate 3 between the inner layer material 5 and the outer layer material 6 of the two-layered cylindrical body 2, and the inner layer material 5 and The outer layer material 6 is bonded in a state where the upper end reaches the vicinity of the top plate 3, but in the case of the interior bag 1 of this embodiment, the top plate 3 and the cylindrical body 2 as shown in FIG. Engagement pieces 10 having a cylindrical shape with substantially the same diameter and a size of several centimeters to several tens of centimeters are provided so as to cover the outer side of the outer layer material 6.

図1のように筒状胴部2の内層材5、外層材6、溶着片7及び係合片10が重なった部分の全周囲にわたる溶着部分11にて熱溶着を行って、筒状胴部2の内層材5と外層材6の接着と筒状胴部2と天板3の一体化を図ると同時に係合片10の取り付けを行う。   As shown in FIG. 1, the tubular body 2 is thermally welded at the welded portion 11 over the entire periphery of the portion where the inner layer material 5, the outer layer material 6, the welded piece 7 and the engagement piece 10 overlap each other. The inner piece 5 and the outer layer 6 are bonded together, and the cylindrical body 2 and the top plate 3 are integrated, and at the same time, the engagement piece 10 is attached.

溶着部分11にて溶着により取り付けられた係合片10は、溶着部分11より下側がフリーで、この部分をドラム缶等の外装容器の上端開口部の外側に引っ掛けて、内装袋1のドラム缶内への落ち込みを防止するものであり、この係合片10の材質は熱溶着可能な可撓性や或る程度の耐久性を持つ合成樹脂シートからなるものであれば特に材料は限定されるものではない。   The engagement piece 10 attached by welding at the welded portion 11 is free below the welded portion 11, and this portion is hooked on the outside of the upper end opening of an outer container such as a drum can to enter the drum can of the interior bag 1. The material of the engagement piece 10 is not particularly limited as long as it is made of a synthetic resin sheet having flexibility that can be heat-welded and a certain degree of durability. Absent.

なお、筒状胴部2の下部と底板4との接合も、筒状胴部2と天板3との取り付けと同様に、二層構造の筒状胴部2の下端で、内層材5と外層材6との間に底板4の溶着片9を挟み、内層材5及び外層材6の下端が底板4付近に達した状態で溶着部分12にて熱溶着を行って、筒状胴部2の内層材5と外層材6の一体化を図ると同時に、筒状胴部2と底板4の一体化を行っている。   In addition, the joining of the lower part of the cylindrical trunk | drum 2 and the baseplate 4 is also the same as attachment of the cylindrical trunk | drum 2 and the top plate 3, and the inner-layer material 5 and the lower end of the cylindrical trunk | drum 2 of a two-layer structure. The welded piece 9 of the bottom plate 4 is sandwiched between the outer layer material 6 and heat welding is performed at the welded portion 12 with the lower ends of the inner layer material 5 and the outer layer material 6 reaching the vicinity of the bottom plate 4, so that the cylindrical body 2 While the inner layer material 5 and the outer layer material 6 are integrated, the cylindrical body 2 and the bottom plate 4 are integrated.

上記内装袋1の製造方法としては、まず、既に図2(a)(b)で示したように、インフレーション法などにより筒状に形成された内層材5の外側に外層材6を重ねて、二重構造の筒状体となった筒状胴部2を構成する。   As the manufacturing method of the interior bag 1, first, as already shown in FIGS. 2 (a) and 2 (b), the outer layer material 6 is overlapped on the outer side of the inner layer material 5 formed into a cylindrical shape by an inflation method or the like. The cylindrical trunk | drum 2 used as the cylindrical body of the double structure is comprised.

図4で示す治具13は、円板状の鏝台14の中央から一方側に棒状体15を突出させた構造であり、この治具13を二重構造の筒状体となった筒状胴部2の内部に挿入し、棒状体15を内側にして円板状の鏝台14を筒状胴部2の一方端部に持って行き、筒状胴部2の端部付近を内側から保持するようにする(図5(a)(b))。   The jig 13 shown in FIG. 4 has a structure in which a rod-like body 15 is protruded from the center of a disk-shaped gantry 14 to one side, and the jig 13 is a cylindrical structure having a double-structured cylindrical body. Insert into the body 2, bring the rod-shaped body 15 to the one end of the cylindrical body 2 with the rod-shaped body 15 inside, and close the end of the cylindrical body 2 from the inside It is made to hold | maintain (FIG. 5 (a) (b)).

治具13における鏝台14の材料は、実施形態では、一例としてステンレス製の上面にフッ素樹脂コートなどの非粘着性材料がコートされているが、これらについても、剛性を有する材料であれば実施形態のものに限定されず、金属製、樹脂製など種々の材質のものを使用できる。但し、内装袋の材料と熱により溶着することがないように、特に鏝台14の外周面側に関しては、四フッ化エチレン樹脂等の非溶着性を有する材料で構成するか、又は非溶着性材料を表面にコーティングしておくのが好ましい。   In the embodiment, the material of the gantry 14 in the jig 13 is coated with a non-adhesive material such as a fluororesin coat on the upper surface made of stainless steel as an example. It is not limited to the form, and various materials such as metal and resin can be used. However, in order not to be welded with the material of the interior bag by heat, the outer peripheral surface side of the base 14 is composed of a material having non-weldability such as tetrafluoroethylene resin or non-weldability. The material is preferably coated on the surface.

この治具13の鏝台14によって内部から支持された付近における筒状胴部2端部の外層材6を内層材5から引き離して二点鎖線の部分で外側に折り返す(図5(c))。   The outer layer material 6 at the end of the cylindrical body 2 in the vicinity of the jig 13 supported from the inside by the base 14 is pulled away from the inner layer material 5 and folded outward at the two-dot chain line portion (FIG. 5C). .

次に、底板4の溶着片9を筒状胴部2の外層材6を剥がした内層材5の上にかぶせるように装着し(図6(d)(e))、その後、外側に折り返していた外層材6を元の状態に戻し、溶着片9の上に外層材6が被さるようにする(図6(f))。   Next, the welding piece 9 of the bottom plate 4 is mounted so as to cover the inner layer material 5 from which the outer layer material 6 of the cylindrical body 2 is peeled off (FIGS. 6D and 6E), and then folded outward. The outer layer material 6 is returned to its original state so that the outer layer material 6 covers the welding piece 9 (FIG. 6F).

次に、鏝16を鏝台14の部分に表面側から押し当てて加熱しながら筒状胴部2を回転させて鏝台14の周囲全体を溶着し、溶着完了の後、治具13を開放側(天側)から抜き出して一方が底板4にて閉鎖され、他方が開放した筒状胴部2が得られる(図7(g)(h))。   Next, the cylindrical body 2 is rotated while pressing the flange 16 against the surface of the rack 14 from the surface side and heated, and the entire periphery of the rack 14 is welded. After the welding is completed, the jig 13 is opened. A cylindrical body 2 is obtained which is extracted from the side (the top side) and closed on the bottom plate 4 and opened on the other side (FIGS. 7G and 7H).

図11は、底板4の溶着作業時の一部拡大断面図であり、内側の鏝台14側から順番に(筒状胴部2の)内層材5、(底板4の)溶着片9、(筒状胴部2の)外層材6が鏝16による加熱によって一体化される。   FIG. 11 is a partially enlarged cross-sectional view of the bottom plate 4 during the welding operation. The inner layer material 5 (of the cylindrical body 2), the welding piece 9 (of the bottom plate 4), The outer layer material 6 (in the cylindrical body 2) is integrated by heating with a flange 16.

次に、筒状胴部2の開放側端部に、図12で示すような、治具17を筒状胴部2の開放側端部に挿入し、筒状胴部2の開放端部付近を内側から保持するようにするする(図8(i))。   Next, a jig 17 as shown in FIG. 12 is inserted into the open side end of the cylindrical body 2 at the open side end of the cylindrical body 2, and the vicinity of the open end of the cylindrical body 2. Is held from the inside (FIG. 8 (i)).

図12は、治具17を示すもので、(a)は円形に広げた状態の斜視図、(b)は同底面図、(c)は折り畳んだ状態の斜視図である。   FIGS. 12A and 12B show the jig 17, in which FIG. 12A is a perspective view in a state where the jig 17 is expanded, FIG. 12B is a bottom view thereof, and FIG. 12C is a perspective view in a folded state.

図12(a)の円形に広げた状態の治具17は、リング状の形状で、平板をこのリング形状に切り抜いたように所定の厚みを有して剛性を確保した上で、リング形状の円の中心を通る直線によって分割されて対称2等分された2つの鏝台18からなり、この鏝台18の下側の分割された部分には蝶番19が設けられており、この蝶番19の部分で分割された鏝台18同士を合わせるように折り畳んで図12(c)に示すような弓状とすることができる。   The jig 17 in a circular shape in FIG. 12 (a) has a ring shape and has a predetermined thickness as if a flat plate is cut out in this ring shape, and after securing rigidity, It consists of two racks 18 that are divided by a straight line passing through the center of the circle and divided into two equal parts. A hinge 19 is provided on the lower part of the rack 18, and It can be folded so that the racks 18 divided at the portions are aligned with each other to form an arc shape as shown in FIG.

この治具17の各部寸法としては、まずリング状の鏝台18の外径は製造される内装袋1の内径と略同一寸法(若干大きめ)となっており、一例として、ドラム缶用の内装袋の製造に使用するものとしては、外径がドラム缶の直径とほぼ同じ約700mm、その直径方向での幅は約80〜120mm程度、厚みは両者とも10〜20mm程度としているが、これに限られること無く、製造される内装袋の種類や寸法に応じて適宜変更されるものであり、特に図12(c)の弓形にした時、天板3の筒口7から取り出せるような寸法であることも必要である。。   The dimensions of each part of the jig 17 are such that the outer diameter of the ring-shaped gantry 18 is substantially the same (slightly larger) as the inner diameter of the inner bag 1 to be manufactured. As an example, the inner bag for a drum can The outer diameter is about 700 mm, which is almost the same as the diameter of the drum, the width in the diameter direction is about 80 to 120 mm, and the thickness is about 10 to 20 mm for both. Without being changed, it is appropriately changed according to the type and size of the interior bag to be manufactured, and in particular, when it is formed in the bow shape of FIG. is necessary. .

治具17における鏝台18の材料は、実施形態では、一例としてステンレス製の上面にフッ素樹脂コートなどの非粘着性材料がコートされているが、これらについても、剛性を有する材料であれば実施形態のものに限定されず、金属製、樹脂製など種々の材質のものを使用できる。但し、内装袋の材料と熱により溶着することがないように、特に鏝台18の外周面側に関しては、四フッ化エチレン樹脂等の非溶着性を有する材料で構成するか、又は非溶着性材料を表面にコーティングしておくのが好ましい。   In the embodiment, the material of the gantry 18 in the jig 17 is coated with a non-adhesive material such as a fluororesin coat on the upper surface made of stainless steel as an example. It is not limited to the form, and various materials such as metal and resin can be used. However, in order not to be welded with the material of the interior bag due to heat, the outer peripheral surface side of the gantry 18 is composed of a non-weldable material such as tetrafluoroethylene resin or the like, or non-weldable. The material is preferably coated on the surface.

次に、底板4の取り付けで行ったのと同様に、この治具17の鏝台18付近の筒状胴部2端部の外層材6を内層材5から引き離して外側に折り返して、筒口7付き天板3を、その溶着片8が治具17の鏝台18によって内部から支持された部分の内層材5の上に被さるように装着する(図8(j))。   Next, the outer layer material 6 at the end of the cylindrical body portion 2 near the base 18 of the jig 17 is pulled away from the inner layer material 5 and folded outwards in the same manner as the bottom plate 4 is attached. The attached top plate 3 is mounted so that the welding piece 8 covers the inner layer material 5 in the portion supported from the inside by the base 18 of the jig 17 (FIG. 8J).

その後、外側に折り返していた外層材6を元の状態に戻し、溶着片8の上に外層材6が被さるようにする(図8(k))。   Thereafter, the outer layer material 6 that has been folded outward is returned to its original state so that the outer layer material 6 covers the welding piece 8 (FIG. 8 (k)).

次に、筒状胴部2の天板3を装着した側の端部に、筒状胴部2とほぼ同直径の短筒状となる、図3で示される係止片10をかぶせ、係止片10の上から鏝16を治具17の鏝台18の周囲側面の部分に沿って当てていく(図9(l)(m))。   Next, the end of the cylindrical body 2 on the side on which the top plate 3 is mounted is covered with a locking piece 10 shown in FIG. The hook 16 is applied from above the stopper piece 10 along the peripheral side surface of the hook base 18 of the jig 17 (FIGS. 9L and 9M).

筒状胴部2を回転させて溶着部を形成すると、図1で示すような、内部の治具17の鏝台18上に、内側から内層材5、溶着片8、外層材6、係止片10が重なった溶着部分11が形成される(図10(n))。   When the welded portion is formed by rotating the cylindrical body portion 2, the inner layer material 5, the weld piece 8, the outer layer material 6, and the latch are formed on the base 18 of the internal jig 17 as shown in FIG. A welded portion 11 where the pieces 10 overlap is formed (FIG. 10 (n)).

図13は、天板3の溶着作業時の一部拡大断面図であり、内側の鏝台18側から順番に(筒状胴部2の)内層材5、(天板3の)溶着片8、(筒状胴部2の)外層材6、係止片10が鏝16による加熱によって一体化される。   FIG. 13 is a partially enlarged cross-sectional view of the top plate 3 during welding work. The inner layer material 5 (of the cylindrical body 2) and the weld piece 8 (of the top plate 3) are sequentially arranged from the inner side of the base 18. The outer layer material 6 (of the cylindrical body 2) and the locking piece 10 are integrated by heating with the flange 16.

その後、治具17を、蝶番19で折りたたんで、ドーナツ形状から図12(c)で示す弓状とし、天板3の筒口7から外部に引き抜く(図10(o))。   Thereafter, the jig 17 is folded by a hinge 19 to form an arcuate shape as shown in FIG. 12C from the donut shape, and is pulled out from the tube opening 7 of the top plate 3 (FIG. 10O).

こうして、二重構造の筒状胴部2の上下端部が天板3と底板4にて閉鎖され、天板3の周囲に係止片10が形成された内装袋1が形成される(図10(p))。   In this way, the upper and lower ends of the cylindrical body 2 having a double structure are closed by the top plate 3 and the bottom plate 4, and the interior bag 1 in which the locking pieces 10 are formed around the top plate 3 is formed (FIG. 10 (p)).

このような材質の異なる内層材5と外層材6との二重構造の筒状胴部2を有し、内層材5と外層材6が天板3や底板4の溶着片8や9を挟んで溶着されている構造の内装袋1は、外部から衝撃が加わって外装容器が瞬間的に変形した際、収納物に加わる衝撃が内層材5に伝わった場合、内装袋1の内側からの衝撃力が加わっても、天板3又は底板4の溶着片8,9が緩衝材となり、溶着部分11,12にかかる衝撃は減少しているので溶着部分11,12は破損されずに内装袋1の気密は保たれる。   The cylindrical body 2 has a double structure of the inner layer material 5 and the outer layer material 6 having different materials, and the inner layer material 5 and the outer layer material 6 sandwich the welding pieces 8 and 9 of the top plate 3 and the bottom plate 4. The inner bag 1 having a structure welded with the inner bag 1 has an impact from the inside of the inner bag 1 when an impact is applied to the inner layer material 5 when the outer container is momentarily deformed due to an external impact. Even if force is applied, the welding pieces 8 and 9 of the top plate 3 or the bottom plate 4 serve as cushioning materials, and the impact applied to the welding parts 11 and 12 is reduced, so that the welding parts 11 and 12 are not damaged and the inner bag 1 Airtightness is maintained.

また、筒状胴部2と天板3、及び筒状胴部2と底板4、それぞれの溶着部分11,12において内層材5と外層材6の特性の違う材質が一体化しており、それぞれの材質の持つ優劣を補完し合い、衝撃力をそれぞれの材質の特性により緩和し、突発的な衝撃に対して強くなる。   In addition, the cylindrical body 2 and the top plate 3 and the cylindrical body 2 and the bottom plate 4, the welded portions 11 and 12, the materials having different characteristics of the inner layer material 5 and the outer layer material 6 are integrated, Complements the superiority and inferiority of the materials, relaxes the impact force by the characteristics of each material, and strengthens against sudden impacts.

図14と図15は、第2の実施形態の内装袋20を示すもので、図14は平面図、図15は斜視図であるが、先の図1乃至図13の実施形態と同一の役割を果たす部分は同一の符号を付して説明する。   14 and 15 show the interior bag 20 of the second embodiment. FIG. 14 is a plan view and FIG. 15 is a perspective view, but the same role as the embodiment of FIGS. The part which fulfills will be described with the same reference numerals.

この実施形態における天板3には、大小の筒口7と筒口21が設けられており、内容物の取り入れ用、取り出し用など、用途により使い分けできるようになっており、この筒口7と筒口21の部分を避けるように凸部22と、凹部23が一体に設けられている。   The top plate 3 in this embodiment is provided with a large and small tube opening 7 and a tube opening 21, which can be used properly depending on the purpose such as taking in and taking out the contents. The convex part 22 and the recessed part 23 are integrally provided so that the part may be avoided.

凸部22は、天板3の基準平面から高さ約2〜5cm程度の厚み分だけ立ち上がっており、全体が糸巻き型で中心から筒口7と筒口21が無い部分へは周縁部の近くにまで達しており、凹部23は、天板3と同心円状の深さ約2〜5cm程度の溝で、凸部22の部分を除く部分に設けられ、天板3に予め凸部22や凹部23の部分や、先の実施形態の図3で示すような溶着片8をかたどった金型を使用し熱成型等の方法により天板3と一体成形されている。   The convex portion 22 rises from the reference plane of the top plate 3 by a thickness of about 2 to 5 cm, and the whole is a pincushion type and from the center to the portion without the cylindrical opening 7 and the cylindrical opening 21 to the vicinity of the peripheral portion. The concave portion 23 is a groove having a depth of about 2 to 5 cm concentrically with the top plate 3 and is provided in a portion excluding the convex portion 22. The top plate 3 is provided with the convex portion 22 and the concave portion 23 in advance. The mold is formed integrally with the top plate 3 by a method such as thermoforming using a mold having a portion or a welded piece 8 as shown in FIG. 3 of the previous embodiment.

底板4は、平板の円板状で、その中央部に底板4と同心円状で外側から見て凹み、内部空間側に約2〜5cm程度で突出する凹部24が形成されている。   The bottom plate 4 is a flat disk, and has a concave portion 24 that is concentric with the bottom plate 4 and is recessed when viewed from the outside at the center, and protrudes about 2 to 5 cm on the inner space side.

この凹部24についても、天板3における凸部22、凹部23、溶着片8と同様、底板4に予め凹部24や、先の実施形態の図3で示すような溶着片9の部分をかたどった金型を使用し熱成型等の方法により底板4と一体成形されている。   Also about this recessed part 24, like the convex part 22, the recessed part 23, and the welding piece 8 in the top plate 3, the recessed part 24 and the part of the welding piece 9 as shown in FIG. It is integrally formed with the bottom plate 4 by a method such as thermoforming using a mold.

上記の構成の内装袋20は、各種流体や粉体の収納用として用いることができ、例えばドラム缶の内側に装着し、ドラム缶の蓋にある上部注入口と内装袋20の筒口7や21の位置を合わせてドラム缶に蓋をして各種液体や粉体等の収納物の収納に使用し、天板3に設けた筒口7や21を通じて流体や粉体の出し入れが可能になる。   The interior bag 20 having the above-described configuration can be used for storing various fluids and powders. For example, the interior bag 20 is mounted on the inside of the drum can, and the position of the upper inlet in the lid of the drum can and the cylinder ports 7 and 21 of the interior bag 20 is provided. In addition, the drum can is covered and used to store stored items such as various liquids and powders, and fluid and powder can be taken in and out through the cylindrical ports 7 and 21 provided on the top plate 3.

また、ドラム缶等の外装容器に、落下による衝撃が加わり、収納物がその重量により外装容器を瞬間的に横方向に押し広げた際、合成樹脂製の内装袋20は、天板3や底板4に設けられた凸部22、凹部23、及び凹部24が、その周囲の天板3や底板4の基準平面との段差部分の垂直部分が斜めになることで天板3や底板4を拡張方向に広げ、内装袋20に加えられた横方向の引っ張り力の緩衝材としての役割を果たし、内装袋20の破損を防ぐことになる。   Further, when an impact due to dropping is applied to an exterior container such as a drum can, and the stored item momentarily spreads the exterior container laterally due to its weight, the interior bag 20 made of synthetic resin has the top plate 3 and the bottom plate 4. The convex part 22, the concave part 23, and the concave part 24 provided on the top plate 3 and the bottom plate 4 are extended in the direction of extension by making the vertical part of the stepped portion with respect to the reference plane of the top plate 3 and the bottom plate 4 around it oblique. The inner bag 20 serves as a buffer for the lateral tensile force applied to the inner bag 20 and prevents the inner bag 20 from being damaged.

よって、凸部22、凹部23及び24は、その周囲の天板3や底板4との基準平面との段差部分が緩衝材の役目を果たすので、なるべく凸部22、凹部23及び24の周囲全面に段差部分が生じるように、天板3や底板4の周縁部に達しないように部分的に設けられる必要がある。   Therefore, since the convex portion 22 and the concave portions 23 and 24 have a stepped portion with respect to the reference plane with the top plate 3 and the bottom plate 4 around the convex portion 22 and the bottom plate 4 as a cushioning material, the entire peripheral surfaces of the convex portion 22 and the concave portions 23 and 24 are preferably used. It is necessary to be provided partially so as not to reach the peripheral edge of the top plate 3 or the bottom plate 4 so that a step portion is formed in the bottom plate 4.

底板4に設けられる凹部24についても、天板に設けられた凸部22(凹部23)と同様に、底板の基準面との段差部分が落下の衝撃による膨張に伴う横方向への引っ張り力の緩衝の役割を果たしているので、底板の周縁部に達しない部分的に設けられ、1つ又は2以上であってもよい。   Similarly to the convex portion 22 (concave portion 23) provided on the top plate, the concave portion 24 provided on the bottom plate 4 has a step portion with respect to the reference surface of the bottom plate, which has a tensile force in the lateral direction due to expansion caused by a drop impact. Since it plays the role of a buffer, it may be partially provided not to reach the peripheral edge of the bottom plate, and may be one or more.

以上のように、この実施形態の内装袋20によると、外装容器に転倒や高所からの落下等の大きな衝撃が加わった際、収納されている液体や粉体等の収納物が衝撃により内部で周囲へ広がり、外装容器を瞬間的に横方向に膨張させるようなことがあっても、内装袋20の天板3や底板4に設けてある凹部23,24や凸部22の段差部分がその段差を無くすように伸びることにより、外装容器の瞬間的な膨張に追随して膨張する内装袋の膨張を吸収することになり、筒状胴部2と天板3及び底板4との溶着部分11,12に加わる衝撃力を低下させ、より耐衝撃性の高い内装袋となる。   As described above, according to the interior bag 20 of this embodiment, when a large impact such as a fall or a fall from a high place is applied to the exterior container, the stored items such as liquid and powder are contained by the impact. Even if the outer container expands to the surroundings instantaneously in the lateral direction, the stepped portions of the concave portions 23 and 24 and the convex portions 22 provided on the top plate 3 and the bottom plate 4 of the inner bag 20 By extending so as to eliminate the step, the expansion of the inner bag that expands following the instantaneous expansion of the outer container is absorbed, and the welded portion between the cylindrical body 2 and the top plate 3 and the bottom plate 4 is absorbed. The impact force applied to 11 and 12 is reduced, resulting in an interior bag with higher impact resistance.

なお、天板3に設けるものは凸部22のみ、凹部23のみでも両方設けてもかまわないし、それぞれが1つずつである必要はなく、複数個設けるようにしてもよく、一方、底板4に設けるのは外側から見て凹状となる凹部24のみとしたのは、外装容器から収納物を完全に取り去る際に、外装容器を斜めにして底板の一番下になる周縁部に筒口からホース等の管を入れて、この底板の一番下となった周縁部に溜まった収納物を吸い出すのであるが、仮に内装袋の底板に外部に突出する凸部を設けると、内装袋の内側から見て凸部の部分が凹部状態となり、この凹部分に入り込んだ収納物は、底板の周縁部まで落ち込まないので、収納物を完全に取り出せないことが生じるからである。   In addition, what is provided in the top plate 3 may provide only the convex part 22, only the recessed part 23, or both, and it is not necessary to provide one each, and a plurality of them may be provided. Only the concave portion 24 that is concave when viewed from the outside is provided when the stored item is completely removed from the outer container. However, if the protruding part protruding outside is provided on the bottom plate of the interior bag, it will be seen from the inside of the interior bag. This is because the convex portion is in a concave state, and the stored item that has entered the concave portion does not fall to the peripheral edge of the bottom plate, so that the stored item cannot be completely removed.

図16は、この発明の第3の実施形態の内装袋において、鏝台18と鏝16を用いて天板3と筒状胴部2を溶着する作業を拡大した断面図であり、この実施形態においても、第1の実施形態と実施形態と同一の役割を果たす部分は同一の符号を付して説明する。   FIG. 16: is sectional drawing to which the operation | work which welds the top plate 3 and the cylindrical trunk | drum 2 using the collar base 18 and the collar 16 in the interior bag of 3rd Embodiment of this invention was expanded, and this embodiment However, the same role as the first embodiment is described with the same reference numerals.

この実施形態の内装袋は、その筒状胴部2が、3つの筒状体を重ねた三層構造となっているが、天板3の溶着片8より内側となる二層を内層材5,5とし、天板3の溶着片8より外側になる一層を外層材6とする。   The inner bag of this embodiment has a three-layer structure in which the cylindrical body portion 2 is formed by stacking three cylindrical bodies, but the inner layer material 5 includes two layers on the inner side of the welding piece 8 of the top plate 3. , 5, and the outer layer material 6 is one layer outside the welding piece 8 of the top plate 3.

この実施形態の内層材5,5及び外層材6についても、特に材質は限定されず、種々の材料を用いることができ、更に、内層材5,5についても、必ずしも同じ材質のものを用いる必要がなく、別の材料のものを用いた二層の内層材とすることもでき、これら内層材5,5及び外層材6の材料の組み合わせにより、それぞれの材料の特質、特性を補完して、より強靭で耐衝撃性に優れた内装袋とすることができる。   The materials for the inner layer materials 5 and 5 and the outer layer material 6 of this embodiment are not particularly limited, and various materials can be used. Further, the inner layer materials 5 and 5 must always be made of the same material. There can be a two-layer inner layer material using another material, and by combining the materials of these inner layer materials 5, 5 and outer layer material 6, the characteristics and characteristics of each material are complemented, The inner bag can be made tougher and excellent in impact resistance.

図17は、この発明の第4の実施形態の内装袋において、鏝台18と鏝16を用いて天板3と筒状胴部2を溶着する作業を拡大した断面図であり、この実施形態においても、第1の実施形態と実施形態と同一の役割を果たす部分は同一の符号を付して説明する。   FIG. 17: is sectional drawing to which the operation | work which welds the top plate 3 and the cylindrical trunk | drum 2 using the collar base 18 and the collar 16 in the interior bag of 4th Embodiment of this invention was expanded, and this embodiment However, the same role as the first embodiment is described with the same reference numerals.

この実施形態の内装袋は、第3の実施形態と同様に三層構造となっているが、天板3の溶着片8より内側となる一層を内層材5とし、天板3の溶着片8より外側になる二層を外層材6,6とする点が相違している。   Although the interior bag of this embodiment has a three-layer structure as in the third embodiment, the inner layer material 5 is one layer inside the welding piece 8 of the top plate 3, and the welding piece 8 of the top plate 3. The difference is that the two outer layers are outer layer materials 6 and 6.

以上、図16及び図17に示す第3、第4の実施形態のように、本発明の内装袋において、内層材5および外層材6は、必ずしも一層づつにする必要はなく、内層材5、外層材6のそれぞれを、同質材料又は異質材料の他層構造としてもよく、要するに、二層構造以上の三層、四層・・・となる多層構造の筒状胴部2を用い、いずれかの層間に、天板3の溶着片8や底板4の溶着片9を挟み込むようにして溶着した構造であればよい。   As described above, as in the third and fourth embodiments shown in FIGS. 16 and 17, in the interior bag of the present invention, the inner layer material 5 and the outer layer material 6 do not necessarily have to be one layer at a time. Each of the outer layer materials 6 may have the same layer material or another layer structure of a different material, in short, using a cylindrical body portion 2 of a multilayer structure having three or more layers, four layers, or more. Any structure may be used as long as the welding piece 8 of the top plate 3 and the welding piece 9 of the bottom plate 4 are sandwiched between the layers.

以上、この発明の内装袋の実施の形態を説明したが、内装袋の種類や寸法、材料、等の詳細については、これらの実施形態にとらわれることなく、この発明の目的の範囲内で適宜変更して実施することができる。   As mentioned above, although embodiment of the interior bag of this invention was described, details, such as a kind, a dimension, material, etc. of an interior bag, are suitably changed within the range of the objective of this invention, without being restricted to these embodiments. Can be implemented.

また、内装袋20の天板3に設けられた凸部22、凹部23、及び底板4に設けられた凹部24の形状、大きさ、段差の高さ等については、実施形態の記述や図示にとらわれることなく、落下の際の衝撃による内装袋の横方向への拡張を、これら凸部22、凹部23、及び凹部24の段差部分が緩衝材の役割を果たす範囲内で、適宜設計を変更して実施することができる。   Further, the shape, size, height of the step, etc. of the convex portion 22, the concave portion 23 provided on the top plate 3 of the interior bag 20, and the concave portion 24 provided on the bottom plate 4 are described in the description and illustration of the embodiment. Without being caught, the design of the interior bag can be expanded in the lateral direction due to the impact of dropping, as long as the stepped portions of these convex portion 22, concave portion 23, and concave portion 24 serve as cushioning materials. Can be implemented.

更に、実施形態で説明した内装袋1,20の天板3は、筒口を1つ乃至2つ設けたものであったが、これについても数は限定されず、要するに、この発明は、実施の形態にて示した形状・大きさの内装袋に限定されることなく、種々の内装袋に適用することができるものである。   Furthermore, although the top plate 3 of the interior bags 1 and 20 described in the embodiment is provided with one or two tube openings, the number is not limited, and in short, the present invention is not limited to the embodiment. The present invention is not limited to an interior bag having the shape and size shown in the form, and can be applied to various interior bags.

1 内装袋
2 筒状胴部
3 天板
4 底板
5 内層
6 外層
7 筒口
8 溶着片
9 溶着片
10 係止片
11 溶着部分
12 溶着部分
13 治具
14 鏝台
15 棒状体
16 鏝
17 治具
18 鏝台
19 蝶番
20 内装袋
21 筒口
22 凸部
23、24 凹部
DESCRIPTION OF SYMBOLS 1 Interior bag 2 Cylindrical trunk | drum 3 Top plate 4 Bottom plate 5 Inner layer 6 Outer layer 7 Tube port 8 Welding piece 9 Welding piece 10 Welding part 11 Welding part 13 Welding part 13 Jig 14 Stand 15 Rod-like body 16 鏝 17 Jig 18 Stand 19 Hinge 20 Interior bag 21 Tube port 22 Convex parts 23, 24 Concave part

Claims (4)

外装容器内に収納されて使用され、筒状胴部の上下端に筒口付き天板と底板とからなる端材を接合して閉鎖され全体が可撓性を有する内装袋において、天板と底板の周囲に筒状胴部と溶着される溶着片を垂直方向に連成しており、筒状胴部が伸び率や耐衝撃性などの材質の特性が相違する内層材と外層材の二重構造で、内層材と外層材との間に前記天板や底板の溶着片を挟み込んで溶着されていることを特徴とする内装袋。   In an interior bag that is used by being housed in an outer container and closed by joining end pieces made of a top plate and a bottom plate with a tube opening to the upper and lower ends of the cylindrical body, and the whole is flexible, the top plate and the bottom plate A welded piece to be welded to the cylindrical body around the cylinder is connected vertically, and the inner and outer layers of the cylindrical body differ in material properties such as elongation and impact resistance. An interior bag having a structure in which a welding piece of the top plate or the bottom plate is sandwiched between an inner layer material and an outer layer material. 筒状胴部の上端付近の外周に、筒状胴部と略同径でかつ筒状胴部より上下寸法の短い筒状体を、その上部を前記天板と筒状胴部とを接合する溶着部分にて溶着して外装容器への引っ掛け用の係合片を形成したことを特徴とする請求項1に記載の内装袋。   A cylindrical body that is substantially the same diameter as the cylindrical body and shorter in vertical dimension than the cylindrical body is joined to the outer periphery near the upper end of the cylindrical body, and the top plate and the cylindrical body are joined to the upper part. The interior bag according to claim 1, wherein an engagement piece for hooking to an outer container is formed by welding at a welded portion. 天板にその周縁部に達しない部分的に凸部又は/及び凹部を筒口の部分を避けて設け、底板にその周縁部に達しない部分的に凹部を設けたことを特徴とする請求項1又は2に記載の内装袋。   2. The top plate is provided with a convex portion or / and a concave portion that does not reach its peripheral portion, avoiding the cylindrical opening portion, and the bottom plate is provided with a concave portion that does not reach its peripheral portion. Or the interior bag of 2. 上記請求項1に記載の内装袋の製造方法であって、筒状胴部の一方端に筒状胴部と略同径の円板状の鏝台を内側から嵌めておいて、底板の溶着片を筒状胴部の一方端の外層材と内層材の間に挿入してから鏝により鏝台上の内層材、溶着片、外層材の溶着を行い筒状胴部と底板を一体化し、次に、筒状胴部の他方端に筒状胴部の直径と略同径の直径のリング状とこのリングの対向2カ所で折り曲げて重ねた弓状とに変換自在となる治具をリング状にして嵌めておいて、天板の溶着片を筒状胴部の他方端の外層材と内層材の間に挿入してから鏝により鏝台上の内層材、溶着片、外層材の溶着を行い筒状胴部と天板を一体化し、その後、治具をリング状から弓状に変換して、天板の筒口から弓状の治具を外側に取り出すことを特徴とする内装袋の製造方法。   A method for manufacturing an interior bag according to claim 1, wherein a disk-shaped saddle having a diameter substantially the same as that of the cylindrical body is fitted from one inside to one end of the cylindrical body, and the bottom plate is welded. Insert the piece between the outer layer material and the inner layer material at one end of the cylindrical body part, and then weld the inner layer material, the welding piece, and the outer layer material on the table with a scissors to integrate the cylindrical body part and the bottom plate, Next, a jig that can be converted into a ring shape having a diameter substantially the same as the diameter of the cylindrical body portion and an arcuate shape that is bent and overlapped at two opposite positions of the ring is attached to the other end of the cylindrical body portion. The top plate welding piece is inserted between the outer layer material and the inner layer material at the other end of the cylindrical body, and then the inner layer material, the welding piece, and the outer layer material on the base are welded by the scissors. The cylindrical body and the top plate are integrated, and then the jig is converted from a ring shape to a bow shape, and the bow-shaped jig is taken out from the tube opening of the top plate. Made Method.
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JP2016016623A (en) * 2014-07-10 2016-02-01 日新産商株式会社 Method for manufacturing inner package, and inner package obtainable from the same
JP2021020732A (en) * 2019-07-30 2021-02-18 大日本印刷株式会社 Tube container
CN113581651A (en) * 2020-04-30 2021-11-02 盛势达(广州)化工有限公司 Moisture-curable material container, inner bag, and method for producing inner bag

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JPS55150749U (en) * 1979-04-17 1980-10-30
US4286723A (en) * 1979-11-29 1981-09-01 Schuetz Udo Composite steel-jacketed plastic barrel
US4635814A (en) * 1983-09-16 1987-01-13 Rheem Manufacturing Company Lined receptacles
JPH0193329A (en) * 1987-10-06 1989-04-12 Fujimori Kogyo Kk Manufacture of cylindrical vessel
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016016623A (en) * 2014-07-10 2016-02-01 日新産商株式会社 Method for manufacturing inner package, and inner package obtainable from the same
JP2021020732A (en) * 2019-07-30 2021-02-18 大日本印刷株式会社 Tube container
CN113581651A (en) * 2020-04-30 2021-11-02 盛势达(广州)化工有限公司 Moisture-curable material container, inner bag, and method for producing inner bag

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