JP2013189273A - Film winding core - Google Patents

Film winding core Download PDF

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JP2013189273A
JP2013189273A JP2012055736A JP2012055736A JP2013189273A JP 2013189273 A JP2013189273 A JP 2013189273A JP 2012055736 A JP2012055736 A JP 2012055736A JP 2012055736 A JP2012055736 A JP 2012055736A JP 2013189273 A JP2013189273 A JP 2013189273A
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boss
tube
core
aluminum alloy
pipe
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Katsunobu Takase
克信 高瀬
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Sankyo Tateyama Inc
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Sankyo Tateyama Inc
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Abstract

PROBLEM TO BE SOLVED: To provide a film winding core preventing generation of chips when a boss is press-fitted to an inside of a core pipe and having excellent durability with respect to pullout of the boss.SOLUTION: Bosses 2 are mounted to both ends in the longitudinal direction of a core pipe 1, respectively. The boss 2 includes a supported part 3 and a mounting part 4 for the core pipe 1. An inner diameter of the core pipe 1 is formed to be 0.1-0.2 mm smaller than an outer diameter of the mounting part 4 of the boss 2. An inner diameter surface roughness Ra of the core pipe 1 is set to be 1.2-3.2, and a press-fitting angle of the boss 2 is set to be R1 or more.

Description

本発明は、液晶フィルムなどを巻き取って保管するフィルム用巻芯に関するものである。   The present invention relates to a film core for winding and storing a liquid crystal film or the like.

図６（ｂ）に示すものは、液晶フィルムなどを巻き取るための巻芯であり、この種の巻芯は、長尺な管２１と、その管２１の長手方向両端部に取り付けるボス２２とから構成してある。そして、図６（ａ）のように、両側の各ボス２２の支持部２３を支持台２５のボス受け２６にそれぞれ置くことにより、フィルム２７を巻き出し可能な状態で支持するものであった。   FIG. 6B shows a winding core for winding up a liquid crystal film or the like. This type of winding core includes a long tube 21 and bosses 22 attached to both ends of the tube 21 in the longitudinal direction. It is composed of Then, as shown in FIG. 6A, the support portions 23 of the bosses 22 on both sides are respectively placed on the boss receivers 26 of the support base 25 to support the film 27 in a state where it can be unwound.

管２１にボス２２を嵌め込んだときに、嵌合部分２４で切り粉が発生することにより、フィルム２７を傷付ける懸念があった。さらに、従来のものは管２１からのボス２２の引き抜きに弱い問題点があった。本発明は、上記課題を鑑みてなされたものであり、切り粉の発生を抑えてボスの引き抜き耐力を有するフィルム用巻芯を提供することにある。   When the boss 22 is fitted into the tube 21, chips are generated at the fitting portion 24, which may cause damage to the film 27. Further, the conventional one has a problem that it is weak to pull out the boss 22 from the pipe 21. This invention is made | formed in view of the said subject, and it exists in providing the core for films which suppresses generation | occurrence | production of a chip | tip and has the drawing-out proof strength of a boss | hub.

本発明のうち請求項１記載の発明は、アルミ製の管とボスとを備え、管は、長手方向両端部にボスをそれぞれ取り付けるものであり、ボスは、支持部と管との取付部を有しており、管の内径はボスの取付部の外径より０．１〜０．２ｍｍ小さく形成してあり、管の内径面粗度は、ＲＡ１．２〜３．２であり、ボスの圧入角度は、Ｒ１以上であることを特徴とする。   The invention according to claim 1 of the present invention includes an aluminum tube and a boss, and the tube attaches the boss to both ends in the longitudinal direction, and the boss has an attachment portion between the support portion and the tube. The inner diameter of the tube is 0.1 to 0.2 mm smaller than the outer diameter of the mounting portion of the boss, and the inner surface roughness of the tube is RA 1.2 to 3.2. The press-fit angle is R1 or more.

本発明のうち請求項２記載の発明は、管の内径は、２００〜４００ｍｍであり、管の肉厚が５〜１２ｍｍであることを特徴とする。   The invention according to claim 2 is characterized in that the inner diameter of the tube is 200 to 400 mm and the wall thickness of the tube is 5 to 12 mm.

本発明のうち請求項３記載の発明は、管をアルミニウム合金６Ｎ０１で成形し、ボスをアルミニウム合金６０６１で成形していることを特徴とする。   The invention according to claim 3 of the present invention is characterized in that the tube is formed of aluminum alloy 6N01 and the boss is formed of aluminum alloy 6061.

本発明のうち請求項１記載の発明によれば、管の内径がボスの外径より０．１〜０．２ｍｍ小さく形成してあり、さらに、管の内径面粗度をＲａ１．２〜３．２としたものに、ボスの圧入角度がＲ１上となるように、ボスの取付部を形成してあることで、ボスの圧入時に、管内周面の粗面の凸部を塑性変形させながら管内に嵌入するので、管内周面から切粉が発生することがなく、液晶パネルを保管するクリーンルーム等でも支障なく使用できるとともに、管からのボスの引き抜き耐力が大きくなるので、ボスと管が堅牢に取り付けることができる。   According to the first aspect of the present invention, the inner diameter of the tube is 0.1 to 0.2 mm smaller than the outer diameter of the boss, and the inner surface roughness of the tube is Ra 1.2 to 3 mm. .2 is formed with a boss mounting portion so that the boss press-fit angle is on R1, while plastically deforming the convex portion of the rough surface of the pipe inner peripheral surface when the boss is press-fitted. Because it fits into the tube, it does not generate chips from the inner surface of the tube, and can be used without problems in clean rooms where liquid crystal panels are stored, and the boss pull-out strength from the tube increases, so the boss and tube are robust. Can be attached to.

本発明のうち請求項２記載の発明によれば、管の外径を２００〜４００ｍｍとし、肉厚を５〜１２ｍｍすることにより、引抜き耐力が向上してボスと管の取付状態がより一層堅牢なものとなる。   According to the second aspect of the present invention, by setting the outer diameter of the tube to 200 to 400 mm and the wall thickness to 5 to 12 mm, the pulling strength is improved and the mounting state of the boss and the tube is further robust. It will be something.

本発明のうち請求項３記載の発明によれば、ボスをアルミニウム合金６０６１で成形し、管をアルミニウム合金６Ｎ０１で成形しているので、いずれのアルミニウム合金についても加工性や引張強度を有する素材であり、さらに、押出性やコスト面でもフィルム用巻芯として最適なものとなる。   According to the third aspect of the present invention, since the boss is formed of aluminum alloy 6061 and the tube is formed of aluminum alloy 6N01, any aluminum alloy is made of a material having workability and tensile strength. In addition, in terms of extrudability and cost, it is optimal as a film core.

（ａ）（ｂ）は、図２（ｂ）中Ａを拡大してボスと管との取り付け状態を示す縦断面図である。(A) (b) is a longitudinal cross-sectional view which expands A in FIG.2 (b), and shows the attachment state of a boss | hub and a pipe | tube. （ａ）は、本実施によるフィルム用巻芯を示す縦断面図であり、（ｂ）は、要部を拡大した縦断面図である。(A) is a longitudinal cross-sectional view which shows the core for films by this implementation, (b) is the longitudinal cross-sectional view which expanded the principal part. （ａ）は、本実施によるフィルム用巻芯を示す全体正面図であり、（ｂ）は、側面図である。(A) is a whole front view which shows the core for films by this implementation, (b) is a side view. （ａ）（ｂ）は、本実施によるボスの製造手順を示す簡略化した正面図である。(A) and (b) are the simplified front views which show the manufacturing procedure of the boss | hub by this implementation. 本実施によるフィルム用巻芯の製造手順を示す簡略化した斜視図である。It is the simplified perspective view which shows the manufacturing procedure of the core for films by this implementation. （ａ）は、従来のフィルム用巻芯を示す縦断面図であり、（ｂ）は、要部を拡大した縦断面図である。(A) is a longitudinal cross-sectional view which shows the conventional core for films, (b) is the longitudinal cross-sectional view which expanded the principal part.

以下に、図面に基づいて本実施によるフィルム用巻芯について説明する。本実施によるフィルム用巻芯（以下、巻芯と記す）は、管１と、管１の長手方向両端部に取り付けられるボス２とを備えており、図３（ａ）（ｂ）のように、支持台９のボス受け１０に置かれている。管１は、図２（ａ）のように、Ａ６Ｎ０１Ｓ−Ｔ５（アルミニウム合金６Ｎ０１を押出し成形したもの）であり、本実施のものでは、管１の内径が２４５ｍｍに設定されている。ボス２は、図３（ｂ）のように、筒状をなす支持部３と、その支持部３よりも径が大きく且つ管１の長手方向両端部に嵌入して取り付ける取付部４とからなっており、Ａ６０６１ＦＤ−Ｔ６（アルミニウム合金６０６１の鍛造成形品）を使用している。また、支持部３は、長手方向の長さが５０ｍｍとしてあり、外径が１７０ｍｍ、内径が１５２．５ｍｍである。さらに、取付部４の径は、外径が２５５．２〜２５５．３ｍｍであり、管１内に飲み込まれる長さは５０ｍｍとしてある。また、管１とボス２は、管１の外周側から直交方向に差し込まれるピン６を連通して抜け止めするものであり、そのピン６を嵌入するためのピン孔７ａ，７ｂが管１とボス２の取付部４にそれぞれ設けてある。また、図１（ａ）（ｂ）のように、管１のボス２の取付箇所となる端部内周面Ｑは、旋盤加工により粗面に形成してあり、その面粗度は、Ｒａ１．２〜３．２以下になっており、これにより、ボス２を管１に嵌入したときに、管１内周の粗面にボス２の取付部４の先端側外周部Ｐの圧入角度がＲ１以下のテーパ部が押圧し、管１内周の粗面の凹凸を塑性変形させながら嵌入していく。このことから、ボス２の嵌入時に管１端部内周面Ｑから切粉が発生せず、切粉によるフィルムを損傷から守ることができる。   Below, the core for films by this implementation is demonstrated based on drawing. The film core according to the present embodiment (hereinafter referred to as a core) includes a tube 1 and bosses 2 attached to both ends in the longitudinal direction of the tube 1 as shown in FIGS. 3 (a) and 3 (b). The boss receiver 10 of the support base 9 is placed. As shown in FIG. 2A, the tube 1 is A6N01S-T5 (extruded aluminum alloy 6N01). In this embodiment, the inner diameter of the tube 1 is set to 245 mm. As shown in FIG. 3 (b), the boss 2 includes a cylindrical support portion 3 and a mounting portion 4 having a diameter larger than that of the support portion 3 and fitted and attached to both longitudinal ends of the tube 1. A6061FD-T6 (a forged product of aluminum alloy 6061) is used. The support part 3 has a length in the longitudinal direction of 50 mm, an outer diameter of 170 mm, and an inner diameter of 152.5 mm. Furthermore, the outer diameter of the attachment portion 4 is 255.2 to 255.3 mm, and the length swallowed into the tube 1 is 50 mm. Further, the tube 1 and the boss 2 communicate with and prevent the pin 6 inserted in the orthogonal direction from the outer peripheral side of the tube 1 and pin holes 7 a and 7 b for inserting the pin 6 are connected to the tube 1. It is provided in the attachment part 4 of the boss | hub 2, respectively. Further, as shown in FIGS. 1 (a) and 1 (b), the end inner peripheral surface Q, which is the attachment location of the boss 2 of the tube 1, is formed into a rough surface by lathe processing, and the surface roughness is Ra1. Thus, when the boss 2 is fitted into the pipe 1, the press-fit angle of the outer peripheral portion P of the distal end side of the mounting portion 4 of the boss 2 is R1 when the boss 2 is fitted into the pipe 1. The following taper part presses, and it inserts, deforming the rough surface of the inner periphery of the pipe 1 while plastically deforming it. Therefore, chips are not generated from the inner peripheral surface Q of the end portion of the tube 1 when the boss 2 is fitted, and the film caused by the chips can be protected from damage.

図４（ａ）（ｂ）は、本実施によるボス２の製造方法を示すものである。
上型１２ａと下型１２ｂとを有し、上型１２ａが上下動する態様のプレス機を使用するものであり、上型１２ａには、ボスの取付部４に相当する形状をなす上側凹部１３ａが設けてあり、また、下型１２ｂには、ボス２の支持部３に相当する形状をなす下側凹部１３ｂが設けてある。そして、図４（ａ）のように、下型１２ｂにアルミニウム合金材２ａを置き、上型１２ａにより複数回プレスすることにより、アルミニウム合金材２ａを鍛錬していく。このとき、下型１２ｂではボス２の支持部３と取付部との境界部分にＲを形成するが、そのＲについては２０Ｒとなるように設定されている。その後、図４（ｂ）のように、アルミニウム合金材２ａの内部を切除して筒状にするとともに、取付部４を切除で形成し、ボス２を製造する。 4 (a) and 4 (b) show a method for manufacturing the boss 2 according to the present embodiment.
A press machine having an upper mold 12a and a lower mold 12b and moving the upper mold 12a up and down is used. The upper mold 12a has an upper recess 13a having a shape corresponding to the mounting portion 4 of the boss. The lower mold 12b is provided with a lower concave portion 13b having a shape corresponding to the support portion 3 of the boss 2. Then, as shown in FIG. 4 (a), the aluminum alloy material 2a is placed on the lower mold 12b and pressed by the upper mold 12a a plurality of times, thereby forging the aluminum alloy material 2a. At this time, in the lower mold 12b, R is formed at the boundary portion between the support portion 3 and the attachment portion of the boss 2, and the R is set to be 20R. After that, as shown in FIG. 4B, the inside of the aluminum alloy material 2a is cut into a cylindrical shape, and the attachment portion 4 is formed by cutting, thereby manufacturing the boss 2.

管１の製造方法については、図５（ａ）のように、管材１ａの外周面に対し、半円弧状の凹部が設けてある管成形用上型１４ａおよび下型１４ｂにより管材１ａを回しながら切削していき、切削後に得られる管１の外径が所定の径となるように成形する。図５（ｂ）のように、管１外周面とボス２取付部４の嵌入部を管１を回転させながら切削する。そして、製造された管１の長手方向両端部の開口のそれぞれに上記工程で製造されたボス２を嵌入して取り付ける。図５（ｃ）にように、ボス２の取付部４を張出部が当接するまで管１の長手方向両端部の開口に嵌入させて差し込む。図５（ｄ）のように、管１とボス２の１２０°間隔の三箇所に、管１とボス２の取付部４とを連通するピン孔７ａ，７ｂを設ける。そして、図５（ｅ）のように、すべてのピン孔７ａ，７ｂにピン６を嵌入して連通し、管１とボス２とを離脱不能に固定し、図５（ｆ）のように、管１外周面を回転しながら仕上げ切削加工を施すことで本実施によるフィルム巻芯が完成する。   About the manufacturing method of the pipe | tube 1, turning the pipe | tube material 1a with the upper mold | type 14a and the lower mold | type 14b for pipe | tube shaping | molding with which the semicircular arc shaped recessed part was provided with respect to the outer peripheral surface of the pipe | tube material 1a like FIG. It cuts and shape | molds so that the outer diameter of the pipe | tube 1 obtained after cutting may become a predetermined diameter. As shown in FIG. 5 (b), the outer peripheral surface of the tube 1 and the fitting portion of the boss 2 attachment portion 4 are cut while rotating the tube 1. And the boss | hub 2 manufactured at the said process is inserted and attached to each of the opening of the longitudinal direction both ends of the manufactured pipe | tube 1. As shown in FIG. As shown in FIG. 5C, the attachment portion 4 of the boss 2 is inserted into the openings at both ends in the longitudinal direction of the tube 1 until the overhanging portion comes into contact. As shown in FIG. 5 (d), pin holes 7a and 7b for connecting the tube 1 and the mounting portion 4 of the boss 2 are provided at three positions at intervals of 120 ° between the tube 1 and the boss 2. Then, as shown in FIG. 5 (e), the pins 6 are inserted into and communicated with all the pin holes 7a, 7b, and the tube 1 and the boss 2 are fixed so as not to be detached. As shown in FIG. The film core according to the present embodiment is completed by performing finish cutting while rotating the outer peripheral surface of the tube 1.

上記のように形成される巻芯は、ボス２がフィルム１１の荷重や衝撃で破損しないものであるのはもちろん、鍛造性やコスト面も考慮する必要がある。このことから、ボス２の材質選定については、アルミニウム合金２０００系、６０００系、７０００系のうちのいずれかが望ましい。このうち、アルミニウム合金２０００系と７０００系は、耐食性が悪く、本実施によるフィルム用巻芯のように屋外使用が想定されるものでは、汚れを落とすために水洗浄が行われることから一定の耐食性を有する必要がある。さらに、本実施では、ボス２のアルミニウム合金材２ａとして径が２００ｍｍを超える押出し棒材を使用することから、強度の高いアルミニウム２０００系と７０００系では押出し性が悪く製造が難しい。また、アルミニウム合金２０００系と７０００系は、変形抵抗値が高いことから鍛造成形には適さず、このことからアルミニウム合金６０００系が選定される。アルミニウム合金６０００系のうち、アルミニウム合金６Ｎ０１やアルミニウム合金６０６３は、成形性は良いが強度不足になるため、Ａ６０６１ＦＤ−Ｔ６（アルミニウム合金６０６１）とするものである。 In the core formed as described above, the boss 2 is not damaged by the load or impact of the film 11, and it is necessary to consider forgeability and cost. For this reason, regarding the material selection of the boss 2, any one of the aluminum alloys 2000 series, 6000 series, and 7000 series is desirable. Among these, the aluminum alloys 2000 and 7000 have poor corrosion resistance, and in the case of being expected to be used outdoors like the film core according to the present embodiment, water washing is performed to remove dirt, so that certain corrosion resistance is obtained. It is necessary to have. Furthermore, in this embodiment, since an extruded bar having a diameter exceeding 200 mm is used as the aluminum alloy material 2a of the boss 2, the high strength aluminum 2000 series and 7000 series have poor extrudability and are difficult to manufacture. Also, the aluminum alloys 2000 and 7000 are not suitable for forging because of their high deformation resistance, and the aluminum alloy 6000 is selected from this. Among the aluminum alloy 6000 series, the aluminum alloy 6N01 and the aluminum alloy 6063 are A6061FD-T6 (aluminum alloy 6061) because the formability is good but the strength is insufficient.

管１は、径が大きいため、変形抵抗値の大きな２０００系、７０００系では押出しが困難であることから、アルミニウム合金６０００系が選択され、その中で押出性、コスト、強度を鑑みたときにＡ６Ｎ０１Ｓ−Ｔ５を選定するものである。ボス２と同様にＡ６０６１ＦＤ−Ｔ６で成形したときには、押出し性が悪いためにコスト高になり、また、押出し性の良好なＡ６０６３Ｓ−Ｔ５としたときには、耐力値が想定される使用環境では満たされないことから管１としては適さない。   Since the pipe 1 has a large diameter, it is difficult to extrude in the 2000 series and 7000 series having a large deformation resistance value. Therefore, the aluminum alloy 6000 series is selected, and in view of extrudability, cost, and strength. A6N01S-T5 is selected. When molded with A6061FD-T6 as well as Boss 2, the cost is high due to poor extrudability, and when A6063S-T5 with good extrudability is used, the proof stress cannot be satisfied in the usage environment. Therefore, it is not suitable for tube 1.

上記のように形成した本実施によるフィルム用巻芯は、管１にフィルム１１を巻いた状態で支持台９のボス受け１０に置いたとき、ボス２の支持部３で管１とフィルム１１の荷重を受けることになる。このとき、ボス２の支持部３と取付部４との境界部８で応力が発生することになるが、ボス２の寸法の設定については、支持部３の長手方向の寸法が４０〜６０ｍｍに設定してある。この範囲内とするのは、４０ｍｍ未満としたときに、ボス２の支持部３と支持台９のボス受け１０との掛かりが浅くなって単位面積あたりの荷重が大きくなり、ボス２に変形のおそれがある。さらに、上記寸法で支持部３の掛かりを確保しようとすれば、境界部８にＲが設けられなくなるので、ボス２の耐久性の確保が難しくなる。これとは反対に、ボス２の支持部３の長手方向の寸法を６０ｍｍよりも長くしたときには、支持部３で発生する曲げモーメントが大きくなり、支持部３が破損するが懸念があると共に、支持台９から外に突出した支持部３が保管時や搬送時の邪魔になってしまう。また、６０ｍｍよりも長く形成した支持部３は、ボス受け１０で受ける範囲を大きくして支持台９を大型化すれば、巻芯の収納性が悪くなってしまう。さらに、巻芯搬送中に加わる揺れや不意の衝撃により、巻芯が格納スペース内で不規則に動いたときには、支持部３が他の搬送品等に引掛かる問題点も考えられる。 When the film core according to the present embodiment formed as described above is placed on the boss receiver 10 of the support base 9 with the film 11 wound around the tube 1, the support 1 of the boss 2 supports the tube 1 and the film 11. Will receive a load. At this time, stress is generated at the boundary portion 8 between the support portion 3 and the attachment portion 4 of the boss 2, but the dimension of the support portion 3 is set to 40 to 60 mm in the longitudinal direction with respect to the dimension setting of the boss 2. It is set. Within this range, when the length is less than 40 mm, the engagement between the support portion 3 of the boss 2 and the boss receiver 10 of the support base 9 becomes shallow and the load per unit area increases, and the boss 2 is deformed. There is a fear. Furthermore, if it is going to secure the hook of the support part 3 with the said dimension, since R will no longer be provided in the boundary part 8, ensuring of the durability of the boss | hub 2 becomes difficult. On the contrary, when the longitudinal dimension of the support part 3 of the boss 2 is longer than 60 mm, the bending moment generated in the support part 3 increases, and there is a concern that the support part 3 may be damaged, The support part 3 protruding outward from the base 9 becomes an obstacle during storage and transportation. Moreover, if the support part 3 formed longer than 60 mm enlarges the range received by the boss receiver 10 to increase the size of the support base 9, the retractability of the core becomes worse. Furthermore, when the core moves irregularly within the storage space due to shaking or unexpected impact applied during the conveyance of the winding core, there may be a problem that the support unit 3 is caught on other conveyed products.

ボス２の支持部３の外径を１６０ｍｍ未満としたときには、上記のように長さが４０〜６０ｍｍとすれば、せん断応力が弱くなるため、支持部３の変形を防ぐためにはボス２の肉厚を厚くしなければならなくなる。さらに、外径を１８０ｍｍよりも大きくしたときには、支持部３に垂直荷重が加わればボス２が凹みやすくなるため、この変形を防ぐためには、同じようにボス２の肉厚を厚くする必要がある。このことからボス２の支持部３は、長さが４０〜６０ｍｍの範囲とし、外径を１６０〜１８０ｍｍの範囲とするものである。さらに、ボス２の支持部３と取付部４との境界部８に設けられるＲは、上記したボス２の支持部３の長さ寸法と外径寸法を考慮したとき、１０〜２０Ｒの範囲とするものであり、フィルム１１を巻いた状態の巻芯を支持台９のボス受け１０で支持したときに、支持部３と取付部４の境界部８に設けてあるＲにより応力が分散する。 When the outer diameter of the support portion 3 of the boss 2 is less than 160 mm, if the length is 40 to 60 mm as described above, the shear stress is weakened. Thickness must be increased. Furthermore, when the outer diameter is larger than 180 mm, the boss 2 is easily recessed when a vertical load is applied to the support portion 3. In order to prevent this deformation, it is necessary to increase the thickness of the boss 2 in the same manner. . Therefore, the support portion 3 of the boss 2 has a length in the range of 40 to 60 mm and an outer diameter in the range of 160 to 180 mm. Further, R provided at the boundary portion 8 between the support portion 3 of the boss 2 and the attachment portion 4 is in the range of 10 to 20R when the length dimension and the outer diameter size of the support portion 3 of the boss 2 described above are taken into consideration. Therefore, when the core in a state where the film 11 is wound is supported by the boss receiver 10 of the support base 9, the stress is dispersed by R provided at the boundary portion 8 between the support portion 3 and the attachment portion 4.

本発明のフィルム用巻芯は、管１の内径がボス２の取付部４の外径より０．１〜０．２ｍｍ小さく形成してあるが、０．１ｍｍ未満であれば、管１とボス２の取付部４の重なり代が小さくなって適正な締付力が得られない。また、０．２ｍｍより大きい場合には、管１とボス２の取付部４の重なり代が大きく、ボス２の管１への圧入時に管１が変形する懸念がある。さらに、本発明のフィルム用巻芯は、管の内径面粗度は、Ｒａ１．２〜３．２であるが、Ｒａ１．２未満であれば、ボス２の管１への圧入が容易となるが、締結後の摩擦力が低下する。また、Ｒａ３．２よりも大きい場合には、圧入時に線上のバリが発生して内部に残留する懸念がある。さらに、本発明のフィルム用巻芯は、ボス２の取付部４の管１への圧入角度がＲ１以上としてあるが、Ｒ１未満であれば、取付部４の先端部がかじることにより局部変形が生じる懸念がある。さらに、本発明のフィルム用巻芯は、管の内径が２００〜４００ｍｍであるが、２００ｍｍ未満であれば、フィルム重量に耐え得る剛性を有しない懸念がある。また、４００ｍｍより大きい場合には、成形の問題上、管１の厚みを増やす必要があることからコストアップの問題がある。また、管１の肉厚が5〜１２ｍｍとしているが、５ｍｍ未満であれば、剛性が保てずに旋盤加工のときに加工面が粗く形成される「びびり」が発生する懸念がある。また、１２ｍｍより大きい場合には、剛性は保てるが切削代が増えるために加工手間が増える問題があり、さらに、剛性が高過ぎるために曲げ矯正ができない不都合がある。 The film core of the present invention is formed such that the inner diameter of the tube 1 is 0.1 to 0.2 mm smaller than the outer diameter of the mounting portion 4 of the boss 2. The overlapping margin between the two mounting portions 4 becomes small, and an appropriate tightening force cannot be obtained. If it is larger than 0.2 mm, the overlap margin between the tube 1 and the mounting portion 4 of the boss 2 is large, and the tube 1 may be deformed when the boss 2 is press-fitted into the tube 1. Furthermore, in the film core of the present invention, the inner surface roughness of the tube is Ra 1.2 to 3.2, but if it is less than Ra 1.2, the boss 2 can be easily pressed into the tube 1. However, the frictional force after fastening decreases. Moreover, when larger than Ra3.2, there exists a possibility that the burr | flash on a line generate | occur | produces at the time of press injection, and it may remain inside. Further, the film core of the present invention has a press-fit angle of the mounting part 4 of the boss 2 to the tube 1 of R1 or more, but if it is less than R1, the tip part of the mounting part 4 is galvanized and local deformation occurs. There are concerns that arise. Furthermore, the film core of the present invention has an inner diameter of the tube of 200 to 400 mm. However, if it is less than 200 mm, there is a concern that the film core does not have rigidity enough to withstand the film weight. On the other hand, if it is larger than 400 mm, there is a problem of cost increase because it is necessary to increase the thickness of the tube 1 due to molding problems. Moreover, although the thickness of the pipe 1 is 5 to 12 mm, if it is less than 5 mm, there is a concern that “chatting” may occur in which the processed surface is rough when lathe processing is performed without maintaining rigidity. On the other hand, if it is larger than 12 mm, the rigidity can be maintained, but there is a problem that the machining labor is increased due to an increase in cutting allowance, and further, there is a disadvantage that bending correction cannot be performed because the rigidity is too high.

１ 管
２ ボス
３ 支持部
４ 取付部 1 pipe 2 boss 3 support part 4 attachment part

Claims (3)

管は、長手方向両端部にボスをそれぞれ取り付けるものであり、ボスは、支持部と管との取付部を有しており、管の内径はボスの取付部の外径より０．１〜０．２ｍｍ小さく形成してあり、管の内径面粗度は、Ｒａ１．２〜３．２であり、ボス２の圧入角度は、Ｒ１以上であることを特徴とするフィルム用巻芯。   The tube has bosses attached to both ends in the longitudinal direction. The boss has an attachment part between the support part and the pipe. The inner diameter of the pipe is 0.1 to 0 from the outer diameter of the attachment part of the boss. A film core characterized in that the inner diameter surface roughness of the tube is Ra 1.2 to 3.2, and the press-fitting angle of the boss 2 is R1 or more. 管の内径は、２００〜４００ｍｍであり、管の肉厚が５〜１２ｍｍであることを特徴とする請求項１記載のフィルム用巻芯。   2. The film core according to claim 1, wherein the inner diameter of the tube is 200 to 400 mm, and the thickness of the tube is 5 to 12 mm. 管をアルミニウム合金６Ｎ０１で成形し、ボスをアルミニウム合金６０６１で成形していることを特徴とする請求項１又は２記載のフィルム用巻芯。
The film core according to claim 1 or 2, wherein the tube is formed of an aluminum alloy 6N01 and the boss is formed of an aluminum alloy 6061.
JP2012055736A 2012-03-13 2012-03-13 Film winding core Withdrawn JP2013189273A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56158458U (en) * 1980-04-25 1981-11-26
JPH07291537A (en) * 1994-04-28 1995-11-07 Nippon Light Metal Co Ltd Assembling type roller
JP3037962U (en) * 1995-08-01 1997-06-06 ビーエーエスエフ、マグネティックス、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツング Hub for winding magnetic tape
JP2001180871A (en) * 1999-12-24 2001-07-03 Fuji Photo Film Co Ltd Manufacturing method of core and magnetic recording medium

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56158458U (en) * 1980-04-25 1981-11-26
JPH07291537A (en) * 1994-04-28 1995-11-07 Nippon Light Metal Co Ltd Assembling type roller
JP3037962U (en) * 1995-08-01 1997-06-06 ビーエーエスエフ、マグネティックス、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツング Hub for winding magnetic tape
JP2001180871A (en) * 1999-12-24 2001-07-03 Fuji Photo Film Co Ltd Manufacturing method of core and magnetic recording medium

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