JP2011218557A - Double paper tube and method of manufacturing the same - Google Patents
Double paper tube and method of manufacturing the same Download PDFInfo
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Abstract
Description
本発明は、紙、プラスチックフィルムやシート、金属箔、布、不織布などの長尺シート状物を巻き取る二重紙管に関するものであり、特に貼着ラベル付きシートをロール状に巻き取るのに適した二重紙管およびその製造方法に関するものである。 The present invention relates to a double paper tube for winding a long sheet-like material such as paper, plastic film or sheet, metal foil, cloth, non-woven fabric, and in particular for winding a sheet with an adhesive label into a roll. The present invention relates to a suitable double paper tube and a manufacturing method thereof.
従来から、紙、プラスチックフィルムやシートなどをロール状に巻き取る場合、一般的には円筒状の紙管に巻き取っている。この紙管は、密度の高いクラフト紙を細幅テープに加工された原紙に接着剤を塗布しつつマンドレルにスパイラル状に何層にも巻回して形成されており、シート状物の巻き付け圧力に対して充分に耐え得る強度と運搬輸送時などに他物と接触しても変形しない堅牢強固に形成されている。 Conventionally, when a paper, a plastic film, a sheet, or the like is wound in a roll shape, it is generally wound around a cylindrical paper tube. This paper tube is formed by spirally winding a mandrel in layers while applying an adhesive to a base paper processed from high-density kraft paper into a narrow tape. On the other hand, it is strong enough to withstand it, and is strong and robust so that it does not deform even if it comes into contact with other objects during transportation and transportation.
このようにして形成された口径の小さい紙管を用いて、例えば、裏面に粘着剤を塗布した貼着ラベルと粘着剤剥離紙を重合した貼着ラベル付きシートを巻き取る場合、図１６に示すように、貼着ラベル付きシート２１が水平状態で送られていく過程において何ら問題は生じないが、ロール状に巻き取られる紙管２２に達すると、その円弧面が小さいと貼着ラベル２３と粘着剤剥離紙２４との間において剥離が生じ、貼着ラベル２３の先端部２３ａが捲れ、紙管２２が矢印Ａ方向に回転していることから、次第に剥がれていき粘着剤剥離紙２４だけ巻き取られ、貼着ラベル付きシートとして使用できないといった問題点があった。 When a paper tube having a small diameter formed in this way is used, for example, when a sheet with an adhesive label on which the adhesive is applied on the back surface and a sheet with an adhesive label obtained by polymerizing the adhesive release paper are shown in FIG. As described above, no problem occurs in the process in which the sheet 21 with the sticking label is sent in a horizontal state, but when the paper tube 22 wound in a roll shape is reached, if the arc surface is small, the sticking label 23 and Peeling occurs between the adhesive release paper 24, the leading end 23a of the sticking label 23 is rolled, and the paper tube 22 is rotated in the direction of arrow A. Therefore, the adhesive release paper 24 is gradually peeled off and only the adhesive release paper 24 is wound. There was a problem that it was taken and cannot be used as a sheet with an adhesive label.
また、プラスチックフィルムなどのシート状物を、口径の小さい紙管で巻き取る場合、下巻層に多大の圧力がかかり巻き始め部分から数周分については巻癖（カール）がついたり、巻き始めに近い部分には紙管表面のスパイラル状の溝による型付き、あるいはシート状物の先端部の段差による型付き、さらにはシート状物の先端部を接着テープで固着した場合は、その接着テープによるテープ状の型付きなどが生じることから、シート状物が不良品になるといった欠点があった。 In addition, when a sheet-like material such as a plastic film is wound up with a paper tube having a small diameter, a great deal of pressure is applied to the lower winding layer, and a curl is applied for several turns from the beginning of winding. Molded by a spiral groove on the surface of the paper tube, or by a step at the tip of the sheet, and if the tip of the sheet is fixed with adhesive tape, use the adhesive tape. Since a tape-shaped mold or the like occurs, there is a drawback that a sheet-like product becomes a defective product.
上記のような欠点を解決するには、口径の大きな紙管を使えば解消できるが、口径の大きな紙管にそれなりの強度を持たせるには、肉厚を分厚くしなければならず、そうすると大幅に重量が増して取り扱いが容易でなくなると共に、持ち運びや巻取り装置への装着も面倒になる。 To solve the above disadvantages, a paper tube with a large diameter can be solved. However, in order to give a paper tube with a large diameter a reasonable strength, the wall thickness must be increased. In addition, the weight increases and handling becomes difficult, and carrying and mounting on a winding device become troublesome.
このような問題点を解消するものとして、例えば、外側紙管に対して、間隔をあけてその内側に内側紙管が配設され、前記外側紙管と内側紙管の端部同士を口金によって固定し、前記外側紙管と内側紙管との間隙部に発泡した硬化樹脂層が充填されている二重紙管が提案されている。また、その二重紙管の製造方法として、外側紙管の内側に内側紙管を配設した後に、これらの両側端縁部にて、外側紙管と内側紙管の両端部に亙る口金を装着すると共に、外側紙管と内側紙管との間に間隙を形成するようにして口金を固定し、前記外側紙管と内側紙管との間隙内に、外側紙管に設けてある注入口から発泡樹脂を注入し、これを硬化させることによって二重紙管を製造する方法が提案されている（特許文献１参照）。 In order to solve such a problem, for example, an inner paper tube is disposed inside the outer paper tube with a space therebetween, and ends of the outer paper tube and the inner paper tube are connected to each other by a base. There has been proposed a double paper tube that is fixed and filled with a foamed cured resin layer in a gap between the outer paper tube and the inner paper tube. In addition, as a method of manufacturing the double paper tube, after the inner paper tube is disposed inside the outer paper tube, the bases extending over both ends of the outer paper tube and the inner paper tube are formed at both side edges. The injection port is attached to the outer paper tube and fixed to the outer paper tube so that a gap is formed between the outer paper tube and the inner paper tube. A method of manufacturing a double paper tube by injecting a foamed resin and curing it has been proposed (see Patent Document 1).
さらに、別な二重紙管の製造方法として、マンドレル上に第一紙管用原紙を巻き込んだ後に、エキストルーダーにより該第一紙管用原紙外周全面に樹脂層を形成し、その樹脂層の外周に第二紙管用原紙を巻き込んで中間に樹脂層を設ける紙管の製造方法が提案されている（特許文献２参照）。 Furthermore, as another method for manufacturing a double paper tube, after winding the first paper tube base paper on a mandrel, an extruder is used to form a resin layer on the entire outer surface of the first paper tube base paper, and on the outer periphery of the resin layer. A paper tube manufacturing method in which a second paper tube base paper is rolled up and a resin layer is provided in the middle has been proposed (see Patent Document 2).
しかしながら、上記特許文献１の二重紙管は、外側紙管に樹脂注入口が穿設されてあるから、シート状物を巻きつけると、この注入口により跡型が付き不良品になる致命的な欠点がある。また、外側紙管と内側紙管の両端部同士に口金を取り付ける必要があり、その取り付けに手間を要するばかりでなく、軽量化を図るにも拘らず、口金を取り付けることにより紙管が重くなりコスト高にもなる。また、その製造方法においても、外側紙管に穿設してある極めて細い注入口から発泡樹脂を充填するようになっており、樹脂注入に時間がかかり生産効率が悪く、かつ口金を取り付けなければ間隙もできないし、硬質発泡樹脂を充填できないといった問題点があった。 However, since the double paper tube of Patent Document 1 has a resin injection port formed in the outer paper tube, if a sheet-like material is wound around, a trace is attached to the injection port and becomes a defective product. There are some disadvantages. In addition, it is necessary to attach a base to both ends of the outer paper tube and the inner paper tube, which not only requires time and effort, but also reduces the weight, but the paper tube becomes heavier by attaching the base. The cost will be high. Also, in the manufacturing method, the foamed resin is filled from the very thin inlet formed in the outer paper tube, and it takes time to inject the resin, so that the production efficiency is poor and the base is not attached. There was a problem that the gap could not be filled and the hard foamed resin could not be filled.
また、上記の引用文献２は、マンドレル上に第一紙管用原紙を巻き込んだ後に、エキストルーダーを利用して該第一紙管用原紙の外周面の全面に樹脂層を形成し、ついで、該樹脂層の上に第二紙管用原紙を巻き込んで、第一紙管用原紙と第二紙管用原紙との間に樹脂層を設けたものであり、この樹脂層は防水性および耐水性の付与を目的としている。また、第一紙管用原紙と第二紙管用原紙との間に樹脂層を巻きつけるため、肉厚にすることができず、十分な強度を持つ二重紙管にならなかった。 Further, in the above cited document 2, after the base paper for the first paper tube is wound on the mandrel, a resin layer is formed on the entire outer peripheral surface of the base paper for the first paper tube using the extruder, and then the resin A base paper for the second paper tube is wound on the layer, and a resin layer is provided between the base paper for the first paper tube and the base paper for the second paper tube. This resin layer is intended to provide waterproofness and water resistance. It is said. Further, since the resin layer is wound between the first paper tube base paper and the second paper tube base paper, the thickness cannot be increased, and a double paper tube having sufficient strength cannot be obtained.
本発明は、上記のような問題点を解決することを課題として開発されたもので、特に貼着ラベル付き剥離シートを巻き取る時に、貼着ラベルが剥がれることなく巻き取ることができる。また、プラスチックフィルムなどのシート状物を巻き取る時においても、巻癖あるいは先端部の段差による型つきなどが生じることのない軽量性と強度性に優れた二重紙管およびその製造方法を提供することを目的とするものである。 The present invention has been developed with the object of solving the above-described problems. Particularly, when a release sheet with an adhesive label is taken up, the adhesive label can be taken up without being peeled off. Also provided is a double paper tube excellent in light weight and strength that does not cause mold formation due to a winding flaw or a step at the tip when winding a sheet-like material such as a plastic film, and a method for manufacturing the same. It is intended to do.
上記の課題を解決し、その目的を達成する手段として、本発明では、口径の小さい円筒状の内筒紙管と、その内筒紙管の外周に間隔部をあけて配設する口径の大きい円筒状の外筒紙管とからなるシート状物をロール状に巻きつける二重紙管であって、内筒紙管と外筒紙管との間隔部に硬質発泡樹脂を介在したことを特徴とする二重紙管を開発し、採用した。 As means for solving the above-mentioned problems and achieving the object, in the present invention, a cylindrical inner cylindrical paper tube having a small diameter and a large diameter arranged with a gap portion on the outer periphery of the inner cylindrical paper tube are provided. A double paper tube that winds a sheet of cylindrical outer tube paper tube in a roll shape, characterized in that a hard foam resin is interposed between the inner tube paper tube and the outer tube paper tube Developed and adopted a double paper tube.
また、本発明では、上記のように構成した二重紙管において、内筒紙管は上下端部の中空部に口金具を固着したことを特徴とする二重紙管、および口金具は内筒紙管の中空部に固着される短筒体と、内筒紙管の上下両端面を被覆する鍔体とから構成されていることを特徴とする二重紙管を開発し、採用した。 Further, in the present invention, in the double paper tube configured as described above, the inner paper tube is characterized in that the double paper tube and the metal fitting are fixed to the hollow portions of the upper and lower ends. A double paper tube characterized by comprising a short cylinder fixed to the hollow part of the tube paper tube and a casing covering the upper and lower end faces of the inner tube paper pipe was developed and adopted.
また、本発明は、内筒紙管の下端部を下部治具のリング状凸部の内径にセットする第1工程と、口径の大きい円筒状の外筒紙管の下端部をリング状凸部の外径にセットする第２工程と、内筒紙管と外筒紙管の上面の間隔部から硬質発泡樹脂を注入し充填する第３工程と、充填後、内筒紙管と外筒紙管の上端面に上部治具を被せて内筒紙管の上端部がリング状凸部の内径に嵌まると同時に、外筒紙管の上端部がリング状凸部の外径に嵌まって上端開口部を閉鎖する第４工程と、下部治具および上部治具を挟持具で挟持する第５工程とからなることを特徴とする二重紙管の製造方法を開発し、採用した。 The present invention also includes a first step of setting the lower end portion of the inner cylindrical paper tube to the inner diameter of the ring-shaped convex portion of the lower jig, and the lower end portion of the cylindrical outer cylindrical paper tube having a large diameter as the ring-shaped convex portion. A second step of setting the outer diameter of the inner cylindrical paper tube, a third step of injecting and filling the hard foamed resin from the space between the upper surface of the inner cylindrical paper tube and the outer cylindrical paper tube, and after filling, the inner cylindrical paper tube and the outer cylindrical paper Cover the upper end of the tube with the upper jig, and the upper end of the inner tube paper tube will fit into the inner diameter of the ring-shaped convex portion, while the upper end portion of the outer tube paper tube will fit into the outer diameter of the ring-shaped convex portion. A double paper tube manufacturing method characterized by comprising a fourth step of closing the upper end opening and a fifth step of holding the lower jig and the upper jig with the holding tool was developed and adopted.
本発明の請求項１によれば、口径の小さい内筒紙管と口径の大きい外筒紙管との間隔部に硬質発泡樹脂を介在した二重紙管であるから、粘着ラベル付きシートを巻き付ける場合において、紙管の円周面に沿って巻き取られラベルが剥がれることなく、正常な形で巻き付けられると共に、巻き癖などが付くことがない。また、同サイズの紙管と比べれば格段に軽くなり、巻き取り装置への装着時に取り扱いやすく作業性が向上するばかりでなく、強度性が向上し運搬輸送時に他物と接触しても損傷することがない。 According to the first aspect of the present invention, since it is a double paper tube in which a hard foamed resin is interposed between the inner cylindrical paper tube having a small diameter and the outer cylindrical paper tube having a large diameter, the sheet with the adhesive label is wound. In some cases, the paper is wound along the circumferential surface of the paper tube and the label is not peeled off. In addition, it is much lighter than a paper tube of the same size and is easy to handle when mounted on a take-up device. There is nothing.
本発明の請求項２によれば、上記請求項１記載の発明の効果に加えて、内筒紙管の上下端部の中空部に口金具を固着してあるから、両端からテーパー状のチャッキング治具が挿入されても、内筒紙管を傷めることなく、長期間にわたって使用可能になる。 According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, since the metal fittings are fixed to the hollow portions of the upper and lower end portions of the inner cylindrical paper tube, the tapered chucks are formed from both ends. Even if the king jig is inserted, it can be used for a long period of time without damaging the inner cylindrical paper tube.
本発明の請求項３によれば、上記請求項２記載の発明の効果に加えて、内筒紙管の中空部だけでなく、上下端面も被覆保護され損傷することがなく長く使用できる。 According to the third aspect of the present invention, in addition to the effect of the second aspect of the present invention, not only the hollow portion of the inner cylindrical paper tube but also the upper and lower end surfaces are covered and can be used for a long time without being damaged.
本発明の請求項４によれば、内筒紙管と外筒紙管を下部治具のリング状凸部の内径と外径に嵌めてセットするから、内筒紙管と外筒紙管は所定の間隔部を存して立設することになり、硬質発泡樹脂の注入充填が容易になるばかりでなく、充填後においては、内筒紙管と外筒紙管の上端面を上部治具を被せて上面開口部を閉鎖し、上部治具、下部治具を挟持具で挟持することから硬質発泡樹脂が漏れることがなく、効率的に樹脂が硬化して、口径の大きな外径を持つ二重紙管であっても、重量の軽い強度性に優れた二重紙管を容易に製造できるものである。 According to the fourth aspect of the present invention, the inner cylindrical paper tube and the outer cylindrical paper tube are set by being fitted to the inner diameter and the outer diameter of the ring-shaped convex portion of the lower jig. It will be erected with a predetermined gap, and not only will it be easy to fill and fill with hard foam resin, but also after filling, the upper ends of the inner and outer cylindrical paper tubes will be connected to the upper jig. Covers the top opening and closes the upper and lower jigs with the clamping tool so that the hard foamed resin does not leak and the resin cures efficiently and has a large outer diameter. Even with a double paper tube, a double paper tube excellent in light weight and strength can be easily manufactured.
以下に、本発明の第１実施の形態を添付図面に基づいて説明する。図１は本発明の実施例を示す二重紙管の正面図、図２はその平面図、図３はその縦断正面図である。この発明に係る二重紙管１は、口径の小さい円筒状の内筒紙管２と、その内筒紙管２の外周に間隔をあけて配設する口径の大きい円筒状の外筒紙管３と、その内筒紙管２と外筒紙管３の間隔部４に介在して硬化する硬質発泡樹脂５とで構成されている。 Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings. 1 is a front view of a double paper tube showing an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a longitudinal front view thereof. A double paper tube 1 according to the present invention includes a cylindrical inner tube paper tube 2 having a small diameter, and a cylindrical outer tube paper tube having a large diameter that is disposed around the outer periphery of the inner tube paper tube 2 at intervals. 3 and a hard foamed resin 5 that is cured by being interposed in a space 4 between the inner cylindrical paper tube 2 and the outer cylindrical paper tube 3.
前記内筒紙管２は、密度の高いクラフト紙を細幅テープに加工された原紙に接着剤を塗布しつつマンドレルにスパイラル状に何層にも巻回して形成された肉厚の薄い口径の小さい円筒状のものである。 The inner tube paper tube 2 is a thin-walled caliber formed by spirally winding a mandrel in layers while applying an adhesive to a kraft paper with a high density and processed into a narrow tape. It is a small cylinder.
前記外筒紙管３は、内筒紙管２と同様に密度の高いクラフト紙を細幅テープに加工された原紙に接着剤を塗布しつつマンドレルにスパイラル状に何層にも巻回して形成された肉厚の分厚い口径の大きい円筒状のものであり、少なくとも口径が３吋以上あればよく、好ましくは４〜６吋が好適であり、６吋を超えてもよいが、大きくなると重くなり、使い勝手が悪くなることから好ましくない。そして、内筒紙管２の外周部に所定の間隔部４を存して外筒紙管３を配設してある。 The outer tubular paper tube 3 is formed by winding a high-density kraft paper in a spiral shape around a mandrel while applying an adhesive to a base paper processed into a narrow tape, like the inner tubular paper tube 2 It is a cylindrical shape with a large diameter and a large diameter, and it is sufficient that the diameter is at least 3 mm, preferably 4 to 6 mm, and may exceed 6 mm, but it becomes heavier as it becomes larger It is not preferable because it is not easy to use. The outer cylindrical paper tube 3 is disposed on the outer peripheral portion of the inner cylindrical paper tube 2 with a predetermined interval 4 therebetween.
内筒紙管２の外周部と外筒紙管３の内周部の間の間隔部４には硬質発泡樹脂５が充填され硬化されている。この硬質発泡樹脂５としては、常温で発泡して硬化するタイプのウレタン樹脂が最適であるが、その他にも塩化ビニール樹脂、ポリエステル樹脂、ポリエチレン樹脂、エポキシ樹脂、ポリアミド樹脂などでもよい。 A space 4 between the outer peripheral portion of the inner cylindrical paper tube 2 and the inner peripheral portion of the outer cylindrical paper tube 3 is filled with a hard foamed resin 5 and cured. The hard foamed resin 5 is optimally a urethane resin that foams and cures at room temperature, but may be a vinyl chloride resin, a polyester resin, a polyethylene resin, an epoxy resin, a polyamide resin, or the like.
図４〜６に示すのは、本発明の第２実施の形態を示すもので、前記第１実施の形態と異なるのは、内筒紙管２と外筒紙管３の肉厚を同じにした点と、内筒紙管２の上下端部の中空部に、口金具６，６を固着した点が相違している。この口金具６，６は、内筒紙管２の中空部を被覆する短筒体６ａ，６ａと、上端面と下端面を被覆する鍔体６ｂ，６ｂによって保護され、チャッキング装置のチャックとの接触による損傷を防止している点が異なっているだけであり、他は前記第１実施の形態と全く変わることがないので、同一部に同一符号を付してある。 4 to 6 show a second embodiment of the present invention. The difference from the first embodiment is that the inner cylindrical paper tube 2 and the outer cylindrical paper tube 3 have the same thickness. The difference is that the fittings 6 and 6 are fixed to the hollow portions at the upper and lower ends of the inner cylindrical paper tube 2. The metal fittings 6 and 6 are protected by short cylindrical bodies 6a and 6a that cover the hollow portion of the inner cylindrical paper tube 2 and casings 6b and 6b that cover the upper end surface and the lower end surface. The only difference is that the damage due to the contact is prevented, and the others are not different from those of the first embodiment, and the same reference numerals are given to the same parts.
つぎに、本発明の二重紙管の製造方法の実施の形態を添付の図７〜図１５に基づいて説明する。この発明に係る二重紙管の製造方法は、図７に示す口径の小さい円筒状の内筒紙管２と、図８に示す口径の大きい円筒状の外筒紙管３と、図９に示す鋼板製で方形状に形成され、内筒紙管２と外筒紙管３を組立てるリング状凸部８を有する治具７を用いて製造するものである。 Next, an embodiment of the method for manufacturing a double paper tube of the present invention will be described with reference to FIGS. The double paper tube manufacturing method according to the present invention includes a cylindrical inner tube paper tube 2 having a small diameter shown in FIG. 7, a cylindrical outer tube paper tube 3 having a large diameter shown in FIG. The jig 7 is manufactured using a jig 7 having a ring-shaped convex portion 8 that is formed in a steel plate and is formed in a square shape and assembles the inner cylindrical paper tube 2 and the outer cylindrical paper tube 3.
すなわち、水平面Ｈに下部治具７ａを載置し、内筒紙管２の下端部２ａをリング状凸部８の内径８ａに嵌めて垂直に立設するのを第１工程とする（図１０）。つづいて、口径の大きい円筒状の外筒紙管３の下端部３ａをリング状凸部８の外径８ｂに嵌めて垂直に立設すると共に、内筒紙管２と外筒紙管３の間隔部４にリング状凸部８が嵌まるのを第２工程とする（図１１）。内筒紙管２と外筒紙管３の上端面の間隔部４から硬質発泡樹脂５を注入して充填するのを第３工程とする（図１２）。充填後、内筒紙管２と外筒紙管３の上端面に、空気孔９を穿設した上部治具７ｂを被せ、内筒紙管２の上端部２ｂがリング状凸部８の内径８ａに嵌まると共に、リング状凸部８が内筒紙管２と外筒紙管３の間隙部４に嵌まり、外筒紙管３の上端部３ｂがリング状凸部８の外径８ｂに嵌まり、上端面開口を閉鎖するのを第４工程とする（図１３）。下部治具７ａと上部治具７ｂを万力などの挟持具１０、１０で挟持するのを第５工程とする（図１４）。上記第１工程から第５工程を経ることにより、内筒紙管２と外筒紙管３の間に硬質発泡樹脂５が介在した軽量性と強度性に優れた二重紙管１が得られる。 That is, the first step is to place the lower jig 7a on the horizontal plane H, and fit the lower end portion 2a of the inner cylindrical paper tube 2 to the inner diameter 8a of the ring-shaped convex portion 8 so as to stand vertically (FIG. 10). ). Subsequently, the lower end portion 3a of the cylindrical outer tubular paper tube 3 having a large diameter is fitted to the outer diameter 8b of the ring-shaped convex portion 8 so as to stand vertically, and the inner tubular paper tube 2 and the outer tubular paper tube 3 The ring-shaped convex portion 8 is fitted into the interval portion 4 as a second step (FIG. 11). The third step is to inject and fill the hard foamed resin 5 from the space 4 between the upper end surfaces of the inner cylindrical paper tube 2 and the outer cylindrical paper tube 3 (FIG. 12). After filling, the upper jig 7b having the air holes 9 is put on the upper end surfaces of the inner cylindrical paper tube 2 and the outer cylindrical paper tube 3, and the upper end 2b of the inner cylindrical paper tube 2 is the inner diameter of the ring-shaped convex portion 8. The ring-shaped convex portion 8 is fitted into the gap 4 between the inner cylindrical paper tube 2 and the outer cylindrical paper tube 3, and the upper end portion 3 b of the outer cylindrical paper tube 3 is the outer diameter 8 b of the ring-shaped convex portion 8. The fourth step is to close the upper end surface opening (FIG. 13). The fifth step is to hold the lower jig 7a and the upper jig 7b with the holding tools 10 and 10 such as a vise (FIG. 14). By passing through the 5th process from the said 1st process, the double paper tube 1 excellent in the lightweight property and intensity | strength in which the hard foamed resin 5 intervened between the inner cylindrical paper tube 2 and the outer cylindrical paper tube 3 is obtained. .
なお、上記の実施の形態による二重紙管の製造方法においては、口金具を固着しない内筒紙管２で説明したが、図１５に示すように、内筒紙管２の上下端部の中空部に、口金具６，６を固着する内筒紙管２を用いることもあり、その場合には、両端部からチャックするチャッキング装置との接触による損傷を防止する二重紙管が得られるものである。 In the double paper tube manufacturing method according to the above embodiment, the inner cylindrical paper tube 2 to which the metal fittings are not fixed has been described. However, as shown in FIG. In some cases, the inner cylindrical paper tube 2 that fixes the fittings 6 and 6 is used in the hollow portion. In this case, a double paper tube that prevents damage due to contact with the chucking device that chucks from both ends is obtained. It is what
以上、本発明の二重紙管の製造方法の実施の形態においては、内筒紙管と外筒紙管の上端面の間隔部から硬質発泡樹脂５を注入して充填する例で説明したが、必ずしもこれに限定されるものではなく、例えば、上部治具に設けたノズルを介して注入充填する場合もあり、本発明の目的を達成でき、かつ本発明の要旨を逸脱しない範囲内で種々の設計変更が可能であるのは言うまでもない。 As described above, in the embodiment of the method for manufacturing the double paper tube of the present invention, the explanation has been made with the example in which the hard foamed resin 5 is injected and filled from the space between the upper end surfaces of the inner tube paper tube and the outer tube paper tube. However, the present invention is not necessarily limited to this. For example, it may be filled by injection through a nozzle provided in the upper jig, and the object of the present invention can be achieved, and various modifications can be made without departing from the gist of the present invention. Needless to say, the design can be changed.
本発明は、粘着ラベル付きシート、プラスチックフィルムやシート、金属箔、不織布、布などのシート状物をロール状に巻き取る二重紙管として好適に利用できるものである。 INDUSTRIAL APPLICABILITY The present invention can be suitably used as a double paper tube for winding a sheet-like material such as a sheet with an adhesive label, a plastic film or sheet, a metal foil, a nonwoven fabric, or a cloth into a roll.
１ 二重紙管
２ 内筒紙管
３ 外筒紙管
４ 間隔部
５ 硬質発泡樹脂
６ 口金具
７ 治具
７ａ 下部治具
７ｂ 上部治具
８ リング状凸部
１０ 挟持具
DESCRIPTION OF SYMBOLS 1 Double paper tube 2 Inner tube paper tube 3 Outer tube paper tube 4 Space | interval part 5 Hard foamed resin 6 Metal fitting 7 Jig 7a Lower jig 7b Upper jig 8 Ring-shaped convex part 10 Clamp
Claims (4)
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|---|---|---|---|
| JP2010086315A JP2011218557A (en) | 2010-04-02 | 2010-04-02 | Double paper tube and method of manufacturing the same |
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| JP2010086315A JP2011218557A (en) | 2010-04-02 | 2010-04-02 | Double paper tube and method of manufacturing the same |
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| Publication Number | Publication Date |
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| JP2011218557A true JP2011218557A (en) | 2011-11-04 |
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| JP2010086315A Pending JP2011218557A (en) | 2010-04-02 | 2010-04-02 | Double paper tube and method of manufacturing the same |
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| KR101742200B1 (en) | 2016-12-02 | 2017-05-31 | 김종암 | A pipe made of styrofoam and film material |
| WO2022197377A1 (en) * | 2021-03-15 | 2022-09-22 | Sonoco Development, Inc. | Lightweight paper tube structure capable of high loading |
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| KR101742200B1 (en) | 2016-12-02 | 2017-05-31 | 김종암 | A pipe made of styrofoam and film material |
| WO2018101759A1 (en) * | 2016-12-02 | 2018-06-07 | 김종암 | Foaming branch pipe and manufacturing method therefor |
| WO2022197377A1 (en) * | 2021-03-15 | 2022-09-22 | Sonoco Development, Inc. | Lightweight paper tube structure capable of high loading |
| US11661304B2 (en) | 2021-03-15 | 2023-05-30 | Sonoco Development, Inc. | Tube structure |
| TWI812552B (en) * | 2021-03-15 | 2023-08-11 | 美商索諾柯開發公司 | Lightweight paper tube structure capable of high loading and method of making the same |
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