JP2018087082A

JP2018087082A - Paper-made bobbin and method for manufacturing paper-made bobbin

Info

Publication number: JP2018087082A
Application number: JP2016232147A
Authority: JP
Inventors: 和秀神谷; Kazuhide Kamiya; 野村　俊; Takashi Nomura; 俊野村; 徹志菅; Tetsuji Suga
Original assignee: Kurobe Shigyou Co Ltd; Toyama Prefectural University
Current assignee: Kurobe Shigyou Co Ltd; Toyama Prefectural University
Priority date: 2016-11-30
Filing date: 2016-11-30
Publication date: 2018-06-07

Abstract

PROBLEM TO BE SOLVED: To provide a paper-made bobbin having high manufacturing efficiency and high strength, and a method for manufacturing the same.SOLUTION: A paper-made bobbin includes: a center core 12 which is a paper-made cylindrical body; and a paper-made disc body 14 having an area larger than that of an opening of an end portion of the center core 12 and serving as an outer flange portion that closes the opening portion of the center core 12 and protrudes to outside of the center core 12. Sewing pieces 24 that protrude in a direction intersecting with an axial direction of the center core 12 are provided at the edge of the opening of the center core 12. The center core 12 is formed by a center core forming piece 16 which is a long rectangular thick paper in one direction, and a plurality of cutting lines 20 intersecting with side edge portions 16a are formed on side edge portions 16a along a longitudinal direction of the center core forming piece 16. A pair of cutting lines 20 and portions surrounded by the side edge portions 16a are the sewing pieces 24. The sewing pieces 24 are bent so as to intersect with the cutting line 20, and the plurality of sewing pieces 24 are continuous over an entire circumference of the edge of the opening of the center core 12. The sewing pieces 24 are superimposed on the disk body 14, and the center core 12 and the disk body 14 are sewn and connected to each other by a sewing thread 38.SELECTED DRAWING: Figure 1

Description

この発明は、長尺資材等を巻き取る紙製ボビンとその製造方法に関する。 The present invention relates to a paper bobbin for winding a long material or the like and a method for manufacturing the same.

従来、各種のケーブルやワイヤ、チューブ、テープ等の長尺資材を巻き取って保管や輸送を行う紙製ボビンが、使用されている。紙製のボビンとしては、従来より特許文献１〜５に開示されているように、種々の構造が提案されている。 2. Description of the Related Art Conventionally, paper bobbins that take up and store and transport various materials such as cables, wires, tubes, and tapes have been used. As paper bobbins, various structures have been conventionally proposed as disclosed in Patent Documents 1 to 5.

特許文献１の紙製ボビンは、円筒状の中芯と円盤状の外鍔とを有し、中芯の端部の周縁に沿って短い突片が設けられ、この突片が外鍔に形成された係合孔に係入され、外鍔の外側面から突出する各突片の先端部がリング状の結合体に結合されて一体化したものである。各突片の先端部と結合体との結合は、縫合糸等で結合させたり、ステープルにより結合させたりしてもよい。 The paper bobbin of Patent Document 1 has a cylindrical center core and a disk-shaped outer casing, and a short projecting piece is provided along the periphery of the end of the inner core, and this projecting piece is formed on the outer casing. The tip of each projecting piece that is inserted into the engagement hole and protrudes from the outer surface of the outer casing is combined with a ring-shaped coupling body to be integrated. The tip of each protruding piece and the bonded body may be bonded with a suture or the like, or may be bonded with staples.

特許文献２、特許文献３の紙製ボビンは、中芯の端部と外鍔とが接着により固定され、一体化したものである。 The paper bobbins disclosed in Patent Documents 2 and 3 are obtained by integrating the end portion of the core and the outer casing by adhesion.

特許文献４、特許文献５の紙製ボビンは、中芯の端部の周縁に沿って、少し長い係合突片が設けられ、この係合突片が、外鍔に形成された複数の第一の係合孔に係入された後、外鍔の外側面から突出する各突片の先端部が折り返され、第二の係合孔に係入されて外鍔の内側面に突出して係合し、一体化したものである。 The paper bobbins of Patent Document 4 and Patent Document 5 are provided with a slightly longer engaging protrusion along the peripheral edge of the end portion of the core, and this engaging protrusion is a plurality of second protrusions formed on the outer casing. After being engaged in one engagement hole, the tip of each protruding piece protruding from the outer surface of the outer casing is folded back, and inserted into the second engagement hole and protrudes into the inner surface of the outer casing. And integrated.

特開平１０−１２９９３８号公報JP 10-129938 A 実開平５−６９０３７号公報Japanese Utility Model Publication No. 5-69037 特開平９−９６７２８号公報JP-A-9-96728 特開２００４−３０７２０７号公報JP 2004-307207 A 特開２００７−２３８３０７号公報JP 2007-238307 A

上記背景技術の特許文献１、特許文献４、特許文献５の場合、外鍔に、中芯の突片を係入する係合孔を複数個形成するため、外鍔の強度が低下するという問題がある。また、特許文献２、特許文献３の場合、接着剤の乾燥に時間がかかり生産効率が良くないものであり、また製品が温度や湿度の変化にさらされた場合に接着剤が変質する恐れがある。 In the case of Patent Document 1, Patent Document 4, and Patent Document 5 of the background art described above, since a plurality of engagement holes for engaging the core core projecting piece are formed in the outer casing, the strength of the outer casing decreases. There is. In the case of Patent Document 2 and Patent Document 3, drying of the adhesive takes time and production efficiency is not good, and there is a risk that the adhesive may be deteriorated when the product is exposed to changes in temperature and humidity. is there.

この発明は、上記背景技術の問題点に鑑みてなされたものであり、生産効率が良く、強度が高い紙製ボビンと紙製ボビンの製造方法を提供することを目的とする。 The present invention has been made in view of the above problems of the background art, and an object thereof is to provide a paper bobbin having high production efficiency and high strength and a method for manufacturing the paper bobbin.

本発明は、紙製の円筒体である中芯と、前記中芯の端部の開口部よりも面積が大きく前記中芯の開口部を閉鎖するとともに前記中芯の外側に突出する外鍔部となる紙製の円板体が設けられ、前記中芯の開口部の縁には前記中芯の軸方向に交差する方向に突出する縫い付け片が設けられ、前記縫い付け片が前記円板体に重ねられて、前記中芯と前記円板体が縫い糸による縫合で連結されている紙製ボビンである。 The present invention provides a core that is a paper cylinder, and an outer flange portion that has a larger area than the opening at the end of the core and closes the opening of the core and protrudes outside the core. And a sewing piece protruding in a direction intersecting the axial direction of the core is provided at an edge of the opening of the core, and the sewing piece is the disk. It is a paper bobbin that is superimposed on a body and in which the core and the disc body are connected by sewing with a sewing thread.

前記中芯は、一方向に長い矩形の厚紙である中芯形成片を環状にして設けられ、前記中芯形成片の長手方向に沿う側縁部には、前記側縁部と交差する複数の切断線が設けられ、一対の前記切断線と、前記側縁部で囲まれた部分が前記縫い付け片であり、前記縫い付け片は前記切断線と交差するように折り曲げられて前記中芯の軸方向に対して略直角に突出し、複数の前記縫い付け片が前記中芯の開口部の縁の全周にわたって連続して設けられているものである。 The core is provided with an annular core-forming piece that is a rectangular cardboard that is long in one direction, and a side edge along the longitudinal direction of the core-forming piece includes a plurality of crossing the side edge. A cutting line is provided, and a pair of the cutting lines and a portion surrounded by the side edges are the sewing pieces, and the sewing pieces are bent so as to intersect the cutting lines and It protrudes substantially perpendicularly to the axial direction, and a plurality of the sewn pieces are provided continuously over the entire circumference of the edge of the opening of the core.

前記縫い糸は、前記中芯の外周面に沿う曲線のステッチとなり、前記ステッチは前記中芯の周囲を異なる直径で複数周にわたり設けられていると良い。 The sewing thread may be a curved stitch along the outer peripheral surface of the core, and the stitch may be provided around the core with a plurality of circumferences with different diameters.

また、前記円板体には、前記中芯に縫い合わせる際にミシンの治具を挿通する孔部が設けられ、前記円板体の位置決めを正確なものにしている。 Further, the disk body is provided with a hole through which a jig for a sewing machine is inserted when the disk body is sewn to the center core, thereby positioning the disk body accurately.

また本発明は、紙製の円筒体で中芯を作り、前記中芯の端部の開口部の縁の一部を折り曲げて前記中芯の軸方向に交差する方向に突出する縫い付け片を形成し、前記縫い付け片に、前記中芯の端部の開口部よりも面積が大きい紙製の円板体を重ね、前記縫い付け片と前記円板体をミシンに装着し、前記中芯の軸を中心に前記中芯と前記円板体を回動させて、前記ミシンにより前記中芯と前記円板体を縫い合わせて連結し、前記円板体が前記中芯の開口部を閉鎖するとともに前記中芯の外側に突出する外鍔部を形成する紙製ボビンの製造方法である。 The present invention also provides a sewing core projecting in a direction intersecting the axial direction of the core by making a core from a paper cylinder and bending a part of the edge of the opening at the end of the core. Forming a paper disk body having a larger area than the opening of the end of the core on the sewing piece, attaching the sewing piece and the disk body to a sewing machine, The center core and the disc body are rotated about the axis of the center, and the center core and the disc body are sewn and connected by the sewing machine, and the disc body closes the opening of the center core. A method for manufacturing a paper bobbin that forms an outer flange projecting outward of the center core.

前記中芯は、厚紙から打ち抜いて形成された一方向に長い矩形の中芯形成片を環状にして形成し、前記中芯形成片の長手方向に沿う側縁部に、前記側縁部に沿う折罫線と、前記側縁部と前記折罫線を結ぶ複数の切断線を設け、前記折罫線と、前記一対の切断線と、前記側縁部で囲まれた部分は前記縫い付け片であり、前記縫い付け片を、前記折罫線を折り曲げて前記中芯の軸方向に対して略直角に突出させ、複数の前記縫い付け片を前記中芯の開口部の縁全周にわたって連続して形成し、前記中芯と前記円板体を前記ミシンにより縫い合わせて連結するものである。 The core is formed by forming a rectangular core-forming piece that is long in one direction, formed by punching out from cardboard, into an annular shape, and along the side edge along the longitudinal direction of the core-forming piece. A crease line, a plurality of cutting lines connecting the side edge portion and the crease line are provided, and the portion surrounded by the crease line, the pair of cutting lines, and the side edge portion is the sewing piece, The sewed piece is bent at the crease line so as to protrude substantially perpendicular to the axial direction of the core, and a plurality of the sewed pieces are continuously formed over the entire periphery of the opening of the core. The center core and the disc body are sewn and connected by the sewing machine.

本発明の紙製ボビンと紙製ボビンの製造方法は、中芯と、外鍔部である円板体を縫い糸で縫い合わせているため、生産効率が良好であり、取り付け強度も高く品質が一定となる。段ボールの縫い付けに用いることができるミシンで縫い合わせることにより、厚みを有する段ボールや厚紙を使用しても簡単に縫い合わせて固定することができる。さらにミシンに治具を取り付け、円板体と中芯を回転させながら縫うことにより、正確に、曲線のステッチを形成することができる。 The paper bobbin and the paper bobbin manufacturing method of the present invention have a high production efficiency, a high mounting strength and a constant quality because the core and the disc body which is the outer collar portion are sewn together with a sewing thread. Become. By sewing with a sewing machine that can be used to sew cardboard, it is possible to easily sew and fix even if cardboard or cardboard having a thickness is used. Furthermore, a curved stitch can be accurately formed by attaching a jig to the sewing machine and performing sewing while rotating the disk and the core.

この発明の第一実施形態の紙製ボビンの斜視図である。It is a perspective view of the paper bobbin of 1st embodiment of this invention. この発明の第一実施形態の中芯の中芯形成片の展開図である。It is an expanded view of the core formation piece of the core of 1st embodiment of this invention. この発明の第一実施形態の円板体の平面図である。It is a top view of the disc body of a first embodiment of this invention. この発明の第一実施形態の補強板の平面図である。It is a top view of the reinforcement board of 1st embodiment of this invention. この発明の第二実施形態の紙製ボビンの斜視図である。It is a perspective view of the paper bobbin of 2nd embodiment of this invention.

以下、この発明の実施形態について図面に基づいて説明する。図１はこの発明の第一実施形態を示すもので、この実施形態の紙製ボビン１０は、紙製の円筒体である中芯１２が設けられ、中芯１２の端部の開口部には、中芯１２の外側に突出する外鍔部となる紙製の円板体１４が設けられている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment of the present invention. A paper bobbin 10 of this embodiment is provided with a core 12 which is a paper cylinder, and an opening at the end of the core 12 is provided. A paper disk 14 serving as an outer flange projecting outward from the core 12 is provided.

中芯１２は、厚紙を打ち抜いて形成されたシート状の中芯形成片１６を組み立てて設けられている。図２は、中芯形成片１６を表面から見た展開図であり、一方向に長い矩形であり、長手方向の一方の端部には、矩形の糊付部１８が側方に突出して設けられている。中芯形成片１６の、長手方向に対して略平行な一対の側縁部１６ａには、側縁部１６ａに対して平行な折罫線２２が設けられ、折罫線２２は矩形の糊付部１８に重ならないように、僅かに側縁部１６ａ寄りの位置に設けられている。側縁部１６ａと折罫線２２の間には、多数の短い切断線２０が設けられている。切断線２０は、側縁部１６ａと折罫線２２に対して直角に設けられ、側縁部１６ａと折罫線２２を結ぶものであり、側縁部１６ａの全長にわたって、互いに等間隔で設けられている。側縁部１６ａと、一対の切断線２０と、折罫線２２で囲まれた複数の矩形の部分は、互いに切断線２０で分離し、円板体１４に重ねて縫い合わされる縫い付け片２４である。 The core 12 is provided by assembling a sheet-shaped core forming piece 16 formed by punching cardboard. FIG. 2 is a developed view of the core forming piece 16 as viewed from the surface, and is a rectangle that is long in one direction, and a rectangular glued portion 18 is provided to protrude laterally at one end in the longitudinal direction. It has been. A pair of side edge portions 16a that are substantially parallel to the longitudinal direction of the core forming piece 16 are provided with crease lines 22 that are parallel to the side edge portions 16a. It is provided at a position slightly closer to the side edge 16a so as not to overlap. A large number of short cutting lines 20 are provided between the side edge portion 16 a and the crease line 22. The cutting line 20 is provided at right angles to the side edge 16a and the crease line 22, and connects the side edge 16a and the crease line 22, and is provided at equal intervals over the entire length of the side edge 16a. Yes. A plurality of rectangular portions surrounded by the side edge portion 16a, the pair of cutting lines 20, and the crease lines 22 are separated from each other by the cutting lines 20, and are sewn pieces 24 that are overlapped and sewn on the disk body 14. is there.

中芯１２は、糊付部１８の表面に糊が塗布され、中芯形成片１６の表面が外側となるようにして長手方向を環状にして糊付部１８を反対側の端部の裏面に接着して、円筒形に組み立てられている。折罫線２２は、中芯形成片１６の表面が直角の谷となるように折り曲げられ、各切断線２０はＶ字状に開かれ、各縫い付け片２４は個々に分離され、折罫線２２で中芯１２の円筒体に連結された状態となり、中芯１２の開口部の全周にわたって、放射状に連続して広がって位置している。 The core 12 is coated with glue on the surface of the glued portion 18, and the longitudinal direction is annular so that the surface of the core-forming piece 16 is on the outside, and the glued portion 18 is on the back of the opposite end. Bonded and assembled into a cylindrical shape. The crease lines 22 are bent so that the surface of the core forming piece 16 forms a right-angled valley, each cutting line 20 is opened in a V shape, and each sewn piece 24 is individually separated. It is in a state where it is connected to the cylindrical body of the center core 12, and is located continuously spreading radially over the entire circumference of the opening of the center core 12.

円板体１４は、所定の厚みの段ボールを打ち抜いて形成され、図３に示すように正円であり、中心には径の小さい正円である透孔２６が形成されている。透孔２６の両側には、円板体１４の直径上に位置する２か所に、挿通孔２８が設けられている。挿通孔２８は、円板体１４の直径に対して直角方向に長い矩形であり、透孔２６に近い２個の角部が丸く面取りされている。透孔２６の、一対の挿通孔２８が設けられている直径から９０°回転した直径上には、透孔２６の両側に、小さい円形の孔部２９が一対設けられている。 The disc body 14 is formed by punching a corrugated cardboard having a predetermined thickness. The disc body 14 is a perfect circle as shown in FIG. 3, and a through hole 26 that is a true circle with a small diameter is formed at the center. On both sides of the through hole 26, insertion holes 28 are provided at two positions located on the diameter of the disk body 14. The insertion hole 28 is a rectangle that is long in the direction perpendicular to the diameter of the disk body 14, and two corners close to the through hole 26 are rounded and chamfered. A pair of small circular holes 29 are provided on both sides of the through-hole 26 on the diameter of the through-hole 26 rotated 90 ° from the diameter at which the pair of insertion holes 28 are provided.

円板体１４の、組立状態で中芯１２が取り付けられる内側面１４ａには、補強板３０が重ねて糊付けされて設けられている。補強板３０は、所定の厚みの段ボールを打ち抜いて形成され、図４に示すように、円板体１４よりも径が小さい正円であり、中心には円板体１４の透孔２６と同じ大きさの透孔３２が設けられ、透孔３２の両側には、挿通孔２８に対向する位置に挿通孔２８よりも少し大きい挿通孔３４が設けられている。また、挿通孔３４から９０°回転した２か所には、側縁部から中心に向かってスリット状に切り欠かれた凹部３６が一対設けられている。透孔３２の両側には、円板体１４の挿通孔２８に対向する位置で、凹部３６の近傍に、挿通孔２８と同じ大きさの挿通孔３７が一対設けられている。補強板３０は、中芯１２の筒状態の内周面よりもわずかに小さい正円であり、中芯１２と重ならないものである。内側面１４ａには、巻き取る長尺資材の長さを示す目盛り３５が印刷されている。 On the inner surface 14a of the disk body 14 to which the core 12 is attached in the assembled state, a reinforcing plate 30 is provided by being overlapped and glued. The reinforcing plate 30 is formed by punching corrugated cardboard having a predetermined thickness, and as shown in FIG. 4, the reinforcing plate 30 is a perfect circle having a smaller diameter than the disc body 14, and has the same center as the through hole 26 of the disc body 14. A through hole 32 having a size is provided, and on both sides of the through hole 32, an insertion hole 34 slightly larger than the insertion hole 28 is provided at a position facing the insertion hole 28. A pair of recesses 36 cut out in a slit shape from the side edge portion toward the center are provided at two locations rotated by 90 ° from the insertion hole 34. On both sides of the through hole 32, a pair of insertion holes 37 having the same size as the insertion hole 28 are provided in the vicinity of the recess 36 at a position facing the insertion hole 28 of the disc body 14. The reinforcing plate 30 is a perfect circle slightly smaller than the cylindrical inner peripheral surface of the core 12 and does not overlap with the core 12. A scale 35 indicating the length of the long material to be wound is printed on the inner side surface 14a.

中芯１２の、放射状に広げられた縫い付け片２４は、円板体１４の内側面１４ａに重ねられ、縫い糸３８で円板体１４に縫合されている。縫い糸３８は、中芯１２の外周面を一周する正円に沿う曲線のステッチとなり、中芯１２を囲んで径が異なる２個の正円が設けられ２重となっている。なお、円板体１４の中心と中芯１２の中心軸は一致し、円板体１４の面は中芯１２の中心軸に対して直角となる。 The sewn pieces 24 of the center core 12 that are radially spread are overlapped on the inner side surface 14 a of the disc body 14, and are sewn to the disc body 14 with a sewing thread 38. The sewing thread 38 is a curved stitch along a perfect circle that goes around the outer peripheral surface of the core 12, and is formed by two double circles having different diameters surrounding the core 12. The center of the disk body 14 and the center axis of the center core 12 coincide with each other, and the surface of the disk body 14 is perpendicular to the center axis of the center core 12.

次に、紙製ボビン１０の製造方法について説明する。まず、中芯１２となる中芯形成片１６を厚紙から打ち抜いて形成し、打ち抜く際に切断線２０と折罫線２２、糊付部１８も形成する。また、円板体１４と補強板３０を段ボールから打ち抜き、補強板３０を円板体１４の内側面１４ａに糊付けする。この時、円板体１４の透孔２６と挿通孔２８を、補強板３０の透孔３２と挿通孔３４に一致させて糊付けする。 Next, a method for manufacturing the paper bobbin 10 will be described. First, the core forming piece 16 to be the core 12 is formed by punching from cardboard, and the cutting line 20, the crease line 22, and the glued portion 18 are also formed when punching. Further, the disc body 14 and the reinforcing plate 30 are punched from the cardboard, and the reinforcing plate 30 is glued to the inner side surface 14 a of the disc body 14. At this time, the through hole 26 and the insertion hole 28 of the disc body 14 are glued so as to coincide with the through hole 32 and the insertion hole 34 of the reinforcing plate 30.

中芯形成片１６の糊付部１８に糊を塗布し、中芯形成片１６の長手方向を環状にして、糊付部１８を反対側の端部の裏面に接着して円筒形にする。折罫線２２を折り曲げ、各縫い付け片２４を分離して放射状に開く。図示しない段ボール用ミシンに１枚の円板体１４と、１個の中芯１２をセットし、中芯１２の内側に円筒形状の治具を差し込み、円板体１４の孔部２９にピン状の治具を差し込み、円板体１４の中心と中芯１２の中心軸が一致して、互いに当接するように保持する。そして、段ボール用のミシンにより、縫い糸３８で縫い付け片２４と円板体１４を縫い合わせる。この時、段ボール用のミシンの針の動きに合わせて治具が円板体１４の中心を軸として所定間隔で回転する。これにより縫い糸３８は中芯１２の外周面を一周する正円形のステッチを描き、縫い付け片２４と円板体１４を縫い合わせる。段ボール用のミシンの針は、円板体１４の半径方向に離間して２本設けられ、２本のステッチで縫合する。なお、治具の回転軸と、ミシンの針との間の間隔を変えて２周するように回縫い付けても良い。 Glue is applied to the glued portion 18 of the core forming piece 16, the longitudinal direction of the core forming piece 16 is made annular, and the glued portion 18 is bonded to the back surface of the opposite end to form a cylinder. The crease line 22 is bent and the sewn pieces 24 are separated and opened radially. A disc body 14 and a single core 12 are set on a cardboard sewing machine (not shown), a cylindrical jig is inserted inside the core 12, and a pin shape is formed in a hole 29 of the disc body 14. The center of the disc body 14 and the center axis of the core 12 are aligned and held so as to contact each other. Then, the sewing piece 24 and the disc body 14 are sewn together with the sewing thread 38 by a cardboard sewing machine. At this time, the jig rotates at a predetermined interval around the center of the disc body 14 as the cardboard sewing machine needle moves. As a result, the sewing thread 38 draws a perfect circular stitch that goes around the outer peripheral surface of the core 12 and sews the sewing piece 24 and the disk body 14 together. Two cardboard sewing needles are provided spaced apart in the radial direction of the disc body 14, and are sewn with two stitches. It should be noted that the sewing may be performed so as to make two turns by changing the interval between the rotating shaft of the jig and the needle of the sewing machine.

中芯１２の一方の端部に円板体１４を縫い付けた後、中芯１２と円板体１４を治具から一旦外して逆向きにして再度セットし、中芯１２の反対側の端部にもう一つの円板体１４を、同じ工程で縫い付ける。これで中芯１２の両側に円板体１４が取り付けられ、紙製ボビン１０が完成する。 After the disc body 14 is sewn to one end of the core 12, the core 12 and the disc body 14 are temporarily removed from the jig and set in the opposite direction, and the opposite end of the core 12 is set. Another disc body 14 is sewed in the same process. As a result, the disk bodies 14 are attached to both sides of the center core 12, and the paper bobbin 10 is completed.

紙製ボビン１０は、中芯１２に、ケーブルやワイヤ、チューブ、テープ等の長尺資材を巻き取って保管、搬送等に使用される。巻き取った長尺部材の長さは、目盛り３５でおおよそ確認することができる。 The paper bobbin 10 is used for storing, transporting, and the like by winding a long material such as a cable, a wire, a tube, and a tape around a core 12. The length of the wound long member can be roughly confirmed on the scale 35.

この実施形態の紙製ボビン１０と紙製ボビンの製造方法によれば、中芯１２と、外鍔部である円板体１４を縫い糸３８で縫い合わせているため、生産効率が良好であり、取り付け強度も高く品質が一定となる。段ボール用ミシンで縫い合わせるため、厚みを有する段ボールや厚紙を使用しても簡単に縫い合わせて固定することができる。段ボール用ミシンに治具を取り付け、円板体１４と中芯１２を回転させながら縫うので、正確に、中芯１２の外周面を一周する正円形のステッチを形成することができる。また、治具により、円板体１４と中芯１２の互いの位置が正確となり、品質が安定する。治具の回転軸と、ミシンの針との間の長さを調整することにより、ステッチの正円の径を任意に設定することができ、任意の直径のステッチを設けることができる。縫い付け片２４は、中芯１２の開口部の縁全周にわたって設けられているため、隙間なく円板体１４に縫い付けることができ、強度が高いものである。 According to the paper bobbin 10 and the paper bobbin manufacturing method of this embodiment, since the core 12 and the disk body 14 which is the outer collar portion are sewn together with the sewing thread 38, the production efficiency is good and the attachment Strength is high and quality is constant. Since it is sewn with a cardboard sewing machine, it can be easily sewn and fixed even if thick cardboard or cardboard is used. Since a jig is attached to the corrugated cardboard sewing machine and the disc body 14 and the core 12 are rotated, a perfect circular stitch that goes around the outer peripheral surface of the core 12 can be formed accurately. Moreover, the mutual position of the disk body 14 and the center core 12 becomes accurate by the jig, and the quality is stabilized. By adjusting the length between the rotation axis of the jig and the needle of the sewing machine, the diameter of the perfect circle of the stitch can be arbitrarily set, and a stitch having an arbitrary diameter can be provided. Since the sewing piece 24 is provided over the entire periphery of the opening of the core 12, the sewing piece 24 can be sewn to the disk body 14 without a gap, and has high strength.

その他、円板体１４は、中芯１２の端部の開口を閉鎖することができ、また、円板体１４には補強板３０が貼り付けられているため、強度が高い。また円板体１４が中芯１２の端部の開口を閉鎖することができるため、治具用の孔部２９を自由な場所に自由な大きさで設けることができる。従来のように円板体１４に中芯１２を取り付けるスリット等を設ける必要がなく、円板体の強度を維持することができる。さらに、接着剤を使用せず、接着剤を乾燥させる時間がかからず、変質や塗りむらにより剥がれる恐れがない。 In addition, the disk body 14 can close the opening of the end portion of the core 12 and has a high strength because the reinforcing plate 30 is attached to the disk body 14. Moreover, since the disk body 14 can close the opening of the end portion of the core 12, the jig hole 29 can be provided in any size and freely. There is no need to provide a slit or the like for attaching the core 12 to the disc body 14 as in the prior art, and the strength of the disc body can be maintained. Furthermore, no adhesive is used, it does not take time to dry the adhesive, and there is no risk of peeling due to alteration or uneven coating.

次にこの発明の第二実施形態について図５に基づいて説明する。なお、ここで、上記実施形態と同様の部材は同様の符号を付して説明を省略する。この実施形態の紙製ボビン４０は、紙製ボビン１０よりも中芯１２の直径が小さいものであり、補強板３０が不要で取り付けられていないものである。円板体１４に、上記第一実施形態のような挿通孔２８が設けられておらず、透孔２６と孔部２９のみが形成され、シンプルな形状である。中芯１２は、上記第一実施形態の紙製ボビン１０と同様に縫い糸３８の２重のステッチで円板体１４に縫い付けられ固定されている。 Next, a second embodiment of the present invention will be described with reference to FIG. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. The paper bobbin 40 of this embodiment has a smaller diameter of the core 12 than the paper bobbin 10, and the reinforcing plate 30 is unnecessary and is not attached. The disc body 14 is not provided with the insertion hole 28 as in the first embodiment, and only the through hole 26 and the hole portion 29 are formed, and has a simple shape. The core 12 is sewn and fixed to the disk body 14 with double stitches of the sewing thread 38 in the same manner as the paper bobbin 10 of the first embodiment.

この実施形態の紙製ボビン４０の製造方法は、上記第一実施形態と同様であり、同様の効果を有するものである。補強板３０が不要であり、部品点数が少なく、製造工程が少なく、コストが安価である。 The manufacturing method of the paper bobbin 40 of this embodiment is the same as that of said 1st embodiment, and has the same effect. The reinforcing plate 30 is unnecessary, the number of parts is small, the manufacturing process is small, and the cost is low.

なお、この発明の紙製ボビンと紙製ボビンの製造方法は、上記各実施形態に限定されず、円板体に設けられる透孔等の形状は、治具の構造等に合わせて適宜変更可能である。中芯の縫い付け片の数や長さは自由に設定可能である。縫い糸のステッチは２重以外でも良く、またステッチの縫い方は確実に縫い合わせ可能なものであれば良く、糸の端部を引くとステッチが解けて廃棄処分が簡単になるものでもよい。紙製ボビンの材料は、上記以外でもよく、厚紙や段ボール以外でもよい。 The paper bobbin and the method for manufacturing the paper bobbin of the present invention are not limited to the above embodiments, and the shape of the through holes provided in the disk body can be changed as appropriate according to the structure of the jig. It is. The number and the length of the core sewing pieces can be freely set. The stitches of the sewing thread may be other than double, and the stitches may be sewn as long as they can be securely sewn. When the end of the thread is pulled, the stitches are released and the disposal can be simplified. The material of the paper bobbin may be other than the above, and may be other than cardboard or cardboard.

１０紙製ボビン
１２中芯
１４円板体
１６中芯形成片
１６ａ側縁部
２０切断線
２２折罫線
２４縫い付け片
２９孔部
３８縫い糸 DESCRIPTION OF SYMBOLS 10 Paper bobbin 12 Center core 14 Disc body 16 Center core formation piece 16a Side edge part 20 Cutting line 22 Folding line 24 Sewing piece 29 Hole part 38 Sewing thread

Claims

紙製の円筒体である中芯と、前記中芯の端部の開口部よりも面積が大きく前記中芯の開口部を閉鎖するとともに前記中芯の外側に突出する外鍔部となる紙製の円板体が設けられ、前記中芯の開口部の縁には前記中芯の軸方向に交差する方向に突出する縫い付け片が設けられ、前記縫い付け片が前記円板体に重ねられて、前記中芯と前記円板体が縫い糸による縫合で連結されていることを特徴とする紙製ボビン。 A paper core that is a cylindrical body made of paper, and has a larger area than the opening at the end of the core, and closes the opening of the core and forms an outer flange that protrudes outside the core. And a sewing piece protruding in a direction intersecting the axial direction of the core is provided at the edge of the opening of the core, and the sewing piece is overlapped on the disk body. The paper bobbin is characterized in that the core and the disc body are connected by sewing with a sewing thread.

前記中芯は、一方向に長い矩形の厚紙である中芯形成片を環状にして設けられ、前記中芯形成片の長手方向に沿う側縁部には、前記側縁部と交差する複数の切断線が設けられ、一対の前記切断線と、前記側縁部で囲まれた部分が前記縫い付け片であり、前記縫い付け片は前記切断線と交差するように折り曲げられて前記中芯の軸方向に対して略直角に突出し、複数の前記縫い付け片が前記中芯の開口部の縁の全周にわたって連続して設けられている請求項１記載の紙製ボビン。 The core is provided with an annular core-forming piece that is a rectangular cardboard that is long in one direction, and a side edge along the longitudinal direction of the core-forming piece includes a plurality of crossing the side edge. A cutting line is provided, and a pair of the cutting lines and a portion surrounded by the side edges are the sewing pieces, and the sewing pieces are bent so as to intersect the cutting lines and 2. The paper bobbin according to claim 1, wherein the paper bobbin protrudes substantially perpendicular to the axial direction, and the plurality of sewn pieces are continuously provided over the entire periphery of the edge of the opening of the core.

前記縫い糸は、前記中芯の外周面に沿う曲線のステッチとなり、前記ステッチは前記中芯の周囲を異なる直径で複数周にわたり設けられている請求項１記載の紙製ボビン。 2. The paper bobbin according to claim 1, wherein the sewing thread is a curved stitch along the outer peripheral surface of the core, and the stitch is provided over the periphery of the core with a plurality of different diameters.

前記円板体には、前記中芯に縫い合わせる際にミシンの治具を挿通する孔部が設けられている請求項１記載の紙製ボビン。 The paper bobbin according to claim 1, wherein the disk body is provided with a hole through which a sewing machine jig is inserted when the disk body is sewn to the core.

紙製の円筒体で中芯を作り、前記中芯の端部の開口部の縁の一部を折り曲げて前記中芯の軸方向に交差する方向に突出する縫い付け片を形成し、前記縫い付け片に、前記中芯の端部の開口部よりも面積が大きい紙製の円板体を重ね、前記縫い付け片と前記円板体をミシンに装着し、前記中芯の軸を中心に前記中芯と前記円板体を回動させて、前記ミシンにより前記中芯と前記円板体を縫い合わせて連結し、前記円板体が前記中芯の開口部を閉鎖するとともに前記中芯の外側に突出する外鍔部を形成することを特徴とする紙製ボビンの製造方法。 A core made of a paper cylinder is formed, a part of the edge of the opening at the end of the core is bent to form a sewn piece that protrudes in a direction intersecting the axial direction of the core, and the sewing A paper disk having a larger area than the opening at the end of the core is overlaid on the attachment piece, the sewing piece and the disk body are attached to a sewing machine, and the axis of the core is centered. The center core and the disc body are rotated, the center core and the disc body are sewn and connected by the sewing machine, the disc body closes the opening of the center core and the center core A method for manufacturing a paper bobbin, comprising forming an outer flange portion protruding outward.

前記中芯は、厚紙から打ち抜いて形成された一方向に長い矩形の中芯形成片を環状にして形成し、前記中芯形成片の長手方向に沿う側縁部に、前記側縁部に沿う折罫線と、前記側縁部と前記折罫線を結ぶ複数の切断線を設け、前記折罫線と、前記一対の切断線と、前記側縁部で囲まれた部分は前記縫い付け片であり、前記縫い付け片を、前記折罫線を折り曲げて前記中芯の軸方向に対して略直角に突出させ、複数の前記縫い付け片を前記中芯の開口部の縁全周にわたって連続して形成し、前記中芯と前記円板体を前記ミシンにより縫い合わせて連結する請求項５記載の紙製ボビンの製造方法。 The core is formed by forming a rectangular core-forming piece that is long in one direction, formed by punching out from cardboard, into an annular shape, and along the side edge along the longitudinal direction of the core-forming piece. A crease line, a plurality of cutting lines connecting the side edge portion and the crease line are provided, and the portion surrounded by the crease line, the pair of cutting lines, and the side edge portion is the sewing piece, The sewed piece is bent at the crease line so as to protrude substantially perpendicular to the axial direction of the core, and a plurality of the sewed pieces are continuously formed over the entire periphery of the opening of the core. The method for manufacturing a paper bobbin according to claim 5, wherein the core and the disk body are connected by sewing with the sewing machine.