JP4931549B2

JP4931549B2 - Conveyor roller

Info

Publication number: JP4931549B2
Application number: JP2006292388A
Authority: JP
Inventors: 顕光神田
Original assignee: Kyocera Corp
Current assignee: Kyocera Corp
Priority date: 2006-10-27
Filing date: 2006-10-27
Publication date: 2012-05-16
Anticipated expiration: 2026-10-27
Also published as: JP2008105085A

Description

本発明は、熱間圧延ライン等において鋼板を搬送するために用いる搬送用ローラに関する。 The present invention relates to a conveying roller used for conveying a steel plate in a hot rolling line or the like.

従来から、各種鉄鋼製品の材料となる鋼板や線材を製造する熱間圧延ラインに搬送用ローラが用いられてきた。この搬送用ローラは、1000℃以上の高温にまで加熱されて圧延された直後の鋼板や線材を次の製品加工ラインや保管場所へ搬送するためのものである。 Conventionally, a conveyance roller has been used in a hot rolling line for producing steel plates and wires used as materials for various steel products. This conveyance roller is for conveying a steel plate or wire just after being heated and rolled to a high temperature of 1000 ° C. or higher to the next product processing line or storage location.

図４は、複数の搬送用ローラを用いた、熱間圧延ラインにおける鋼板や鉄鋼線材等の次工程への搬送を示す運搬ラインの概略図である。 FIG. 4 is a schematic diagram of a transport line that shows transport of a steel plate, steel wire, and the like to the next step in a hot rolling line using a plurality of transport rollers.

図４に示すように、熱間圧延ラインには複数の搬送用ローラ41が設置されており、熱間圧延直後の鋼板42は、不図示の回転駆動機構の回転駆動により回転軸43に取り付けられた搬送用ローラ41を回転させ、矢印方向の先にある次の製品加工ラインや保管場所へ搬送される。 As shown in FIG. 4, a plurality of conveying rollers 41 are installed in the hot rolling line, and the steel plate 42 immediately after the hot rolling is attached to the rotating shaft 43 by a rotational drive of a rotational drive mechanism (not shown). The transport roller 41 is rotated and transported to the next product processing line or storage location ahead of the arrow.

この熱間圧延ラインで用いる搬送用ローラ41には金属製ローラが用いられてきたが、金属製ローラは鋼板42との摩擦により磨耗しやすく、また耐熱性に劣ることから、近年においては、高い耐磨耗性と耐熱性を備えたセラミック製ローラが用いられている。 A metal roller has been used as the conveying roller 41 used in this hot rolling line, but the metal roller is likely to wear due to friction with the steel plate 42 and is inferior in heat resistance. Ceramic rollers with wear resistance and heat resistance are used.

しかし、全体をセラミック製とした搬送用ローラは、寿命という観点では望ましいが、全体をセラミック製とした搬送用ローラ41は高価であり、また、複雑な形状や大型の搬送用ローラ41の製造は困難であった。 However, a transfer roller made entirely of ceramic is desirable from the viewpoint of service life, but the transfer roller 41 made entirely of ceramic is expensive, and the manufacture of a complicated shape or large size transfer roller 41 is not possible. It was difficult.

このため、搬送する鋼板と接触する部分をセラミック製とし、他の部分を金属製とした複合構造の搬送用ローラが用いられるようになった。このような搬送用ローラとすれば、鋼板が接触するローラの外周部のみをセラミック製としているため、コストを低減でき、また、複雑な形状や大型の搬送用ローラであっても、セラミック部材は単に円筒状とした構成とすれば、容易に製造可能となる。 For this reason, the conveyance roller of the composite structure which made the part which contacts with the steel plate to convey from the ceramics, and used the other part as the metal came to be used. If such a transport roller is used, only the outer peripheral portion of the roller in contact with the steel plate is made of ceramic, so that the cost can be reduced, and even with a complicated shape or a large transport roller, the ceramic member If the structure is simply cylindrical, it can be easily manufactured.

しかしながら、高温の鋼板を搬送すれば、鋼板と接触するセラミック部材を通して金属部材に熱が伝わり、金属部材は膨張する。セラミック部材と金属部材との熱膨張差は一般的に非常に大きい（セラミック：２〜８×10^−６／℃、金属：10〜20×10^−６／℃）ことから、セラミック部材と金属部材との熱膨張差が原因で、セラミック部材が破損する、あるいはセラミック部材と金属部材との固定が緩み、空回りするという問題が生じていた。 However, if a high temperature steel plate is conveyed, heat will be transmitted to a metal member through the ceramic member which contacts a steel plate, and a metal member will expand. Since the thermal expansion difference between the ceramic member and the metal member is generally very large (ceramic: 2 to 8 × 10 ⁻⁶ / ° C., metal: 10 to 20 × 10 ⁻⁶ / ° C.), the ceramic member and the metal member Due to the difference in thermal expansion between the ceramic member and the ceramic member, the ceramic member is damaged, or the ceramic member and the metal member are loosely fixed, resulting in idle rotation.

この問題に対し、セラミック部材と金属部材とから構成された搬送用ローラとして、例えば特許文献１には、金属軸にセラミック製の円筒状ローラ部材を装着し、当該ローラ部材をその両端面より前記金属軸に固定された金属フランジにて挾持するとともに、前記金属フランジに配置されたピンの先端部分を前記ローラ部材の端面に設けられた固定穴に挿入することにより、前記ローラ部材を金属フランジに固定した複合構造セラミックローラであって、前記固定穴が、前記ローラ部材の径方向に伸びる長軸を有する長穴である複合構造セラミックローラが提案されている。このようなローラ構造であれば、セラミックス製のローラ部材と金属フランジとの熱膨張差によるローラ部材の破損が生じることがなく、ローラ部材の空回りを防止して、金属軸の駆動力をローラ部材に確実に伝達することができるというものである。 In order to solve this problem, for example, in Patent Document 1, a cylindrical roller member made of ceramic is attached to a metal shaft as a transport roller composed of a ceramic member and a metal member. The roller member is clamped by a metal flange fixed to the metal shaft, and the tip of the pin disposed on the metal flange is inserted into a fixing hole provided on the end surface of the roller member, whereby the roller member is attached to the metal flange. There has been proposed a composite structure ceramic roller which is a fixed composite structure ceramic roller, wherein the fixing hole is a long hole having a long axis extending in the radial direction of the roller member. With such a roller structure, the roller member is not damaged due to a difference in thermal expansion between the ceramic roller member and the metal flange, and the roller member is prevented from idling and the driving force of the metal shaft is increased. Can be transmitted reliably.

また、特許文献２には、熱間圧延ラインにおいて鋼板を製造するのに用いるセラミックス製ロールであって、１個または複数個のセラミックス製スリーブを金属製軸材の外周に嵌着して構成され、金属製軸材の表面に、アルミニウム合金被覆層またはクロム合金被覆層を形成したセラミックス製ロールが提案されている。そして、このセラミック製スリーブを、窒化珪素を主成分とする焼結体からなり、常温における熱伝導率が50Ｗ／（ｍ・Ｋ）以上であるものとすることにより、加熱と冷却との熱サイクルの繰り返しによってもセラミックス製スリーブが破損することを防止できるというものである。
特開２０００−３３５７２７号公報特開２００５−１６９４６２号公報 Further, Patent Document 2 is a ceramic roll used for manufacturing a steel plate in a hot rolling line, wherein one or a plurality of ceramic sleeves are fitted on the outer periphery of a metal shaft member. A ceramic roll in which an aluminum alloy coating layer or a chromium alloy coating layer is formed on the surface of a metal shaft has been proposed. The ceramic sleeve is made of a sintered body containing silicon nitride as a main component, and has a thermal conductivity of 50 W / (m · K) or more at room temperature, whereby a heat cycle of heating and cooling is performed. It is possible to prevent the ceramic sleeve from being damaged by repeating the above.
JP 2000-335727 A JP 2005-169462 A

しかしながら、特許文献１に提案されているローラ構造では、セラミック製のローラ部材と金属フランジ部との熱膨張差が原因で固定穴からローラ部材が破損することは防止できるものの、金属軸の外径がセラミック製のローラ部材の内径以上に熱膨張すると、ローラ部材の内周面がセラミック製のローラ部材の強度以上の内圧を受けて破損するおそれがある。 However, in the roller structure proposed in Patent Document 1, although the roller member can be prevented from being damaged from the fixing hole due to the difference in thermal expansion between the ceramic roller member and the metal flange portion, the outer diameter of the metal shaft If the thermal expansion exceeds the inner diameter of the ceramic roller member, the inner peripheral surface of the roller member may be damaged by receiving an internal pressure higher than the strength of the ceramic roller member.

また、特許文献２に提案されている搬送用ローラの構造とすれば、セラミックス製スリーブを嵌着させる金属製軸材の劣化や錆の発生を防止でき、軸材の劣化が原因で生じるセラミックス製スリーブの割れを防止できると考えられるが、特許文献１と同様に金属製軸材とセラミックス製スリーブとの間の径方向の熱膨張差については何ら対策されていないため、金属製軸材とセラミックス製スリーブとの熱膨張差により、セラミックス製スリーブが金属製軸材との接触面に内圧（引張応力）を受け、これがセラミック製スリーブの強度を超えると破損するおそれがある。 Moreover, if the structure of the conveyance roller proposed in Patent Document 2 is adopted, it is possible to prevent the deterioration of the metal shaft material on which the ceramic sleeve is fitted and the generation of rust, and the ceramic material produced due to the deterioration of the shaft material. Although it is thought that cracking of the sleeve can be prevented, there is no countermeasure against the thermal expansion difference in the radial direction between the metal shaft and the ceramic sleeve as in Patent Document 1, so that the metal shaft and ceramic Due to the difference in thermal expansion from the sleeve made of ceramic, the ceramic sleeve may be subject to internal pressure (tensile stress) on the contact surface with the metal shaft, and may be damaged if it exceeds the strength of the ceramic sleeve.

また、セラミックス製スリーブと金属製軸材とが接触面で摩擦するため、機械的強度に劣る金属製軸材の表面が磨耗し易いという問題があった。さらに、金属製軸材が摩耗し、金属製軸材とセラミックス製スリーブとのクリアランスにバラツキが生じると、搬送する鋼板の荷重を平均的に受けるように金属製軸材の軸方向と常に平行に嵌合されるべきセラミックス製スリーブが、クリアランスのバラツキにより傾いた形で鋼板と接触することとなり、その場合にはセラミックス製スリーブの一部が著しく摩耗してその寿命が縮まるばかりか、荷重の集中によりスリーブが破損するおそれがある。 Further, since the ceramic sleeve and the metal shaft member rub against each other at the contact surface, there is a problem that the surface of the metal shaft member inferior in mechanical strength is easily worn. In addition, when the metal shaft is worn and the clearance between the metal shaft and the ceramic sleeve varies, it is always parallel to the axial direction of the metal shaft so that the load of the steel plate to be conveyed is averaged. The ceramic sleeve to be fitted comes into contact with the steel plate in a tilted manner due to the variation in clearance. In this case, a part of the ceramic sleeve is significantly worn and its life is shortened, and the load is concentrated. May damage the sleeve.

本発明は、上記課題を解決すべく案出されたものであり、セラミック部材と金属部材との熱膨張差によりセラミック部材が破損する、あるいはセラミック部材と金属部材との固定が緩んで空回りすることなく高温の鋼板を搬送できる搬送用ローラを提供することを目的とする。 The present invention has been devised to solve the above problems, and the ceramic member is damaged due to a difference in thermal expansion between the ceramic member and the metal member, or the fixing between the ceramic member and the metal member is loosened and idles. An object of the present invention is to provide a conveying roller that can convey a high-temperature steel sheet.

本発明の搬送用ローラは、金属製の内筒部材とセラミック製の外筒部材とからなり、前記内筒部材と前記外筒部材との間に所定の隙間を維持するように複数のリング状部材が配置されているとともに、前記内筒部材の一方の端部の外周側にフランジ部が形成されており、該フランジ部に、前記外筒部材の端面を押圧して前記内筒部材が前記外筒部材を保持
する複数の押圧手段が設けられていることを特徴とするものである。
The conveying roller of the present invention comprises a metal inner cylinder member and a ceramic outer cylinder member, and a plurality of ring-shaped members are maintained so as to maintain a predetermined gap between the inner cylinder member and the outer cylinder member. together member is disposed, a flange portion is formed on the outer peripheral side of the one end of the inner cylinder member, the said flange portion, the inner cylinder member to press the end surface of the outer cylinder member is the Holds the outer cylinder member
A plurality of pressing means are provided .

また、本発明の搬送用ローラは、上記構成において、前記内筒部材の他方の端部にリング状フランジ部材が取り付けられていることを特徴とするものである。
The conveying roller of the present invention having the above structure and is characterized that you have attached-ring-shaped flange member at the other end of the front Symbol inner cylinder member.

さらに、本発明の搬送用ローラは、上記各構成において、前記押圧手段が、前記内筒部材の端部に固定された固定手段と、ばね部材と、前記外筒部材に当接する可動部材とからなることを特徴とするものである。 Furthermore, the conveying roller of the present invention is the above-described configuration, wherein the pressing means includes a fixing means fixed to an end portion of the inner cylinder member, a spring member, and a movable member that contacts the outer cylinder member. It is characterized by.

また、本発明の搬送用ローラは、上記各構成において、前記外筒部材の端部に段差が設けてあり、前記内筒部材のフランジ部がその段差に収まっていることを特徴とするものである。 Moreover, the conveying roller of the present invention is characterized in that, in each of the above-described configurations, a step is provided at an end of the outer cylinder member, and a flange portion of the inner cylinder member is accommodated in the step. is there.

また、本発明の搬送用ローラは、上記各構成において、前記リング状部材が前記内筒部材に設けた溝に配置されたことを特徴とするものである。 Moreover, the conveying roller of the present invention is characterized in that, in each of the above-described configurations, the ring-shaped member is disposed in a groove provided in the inner cylinder member.

また、本発明の搬送用ローラは、上記各構成において、前記外筒部材が窒化珪素セラミックスからなることを特徴とするものである。 Moreover, the conveying roller of the present invention is characterized in that, in each of the above-mentioned configurations, the outer cylinder member is made of silicon nitride ceramics.

本発明の搬送用ローラによれば、金属製の内筒部材とセラミック製の外筒部材とからなり、前記内筒部材と前記外筒部材との間に所定の隙間を維持するように複数のリング状部材が配置されているとともに、前記内筒部材の一方の端部の外周側にフランジ部が形成されており、該フランジ部に、前記外筒部材の端面を押圧して前記内筒部材が前記外筒部材を保持する複数の押圧手段が設けられた搬送用ローラ構造としたことによって、高温に加熱された鋼板を繰り返し搬送した際に、金属製の内筒部材とセラミック製の外筒部材との間に熱膨張差によって生じる寸法差を、両者間に設けた所定の隙間で相殺することが可能となり、セラミック製の外筒部材が破損することを防止することができる。
According to the conveying roller of the present invention, the conveying roller includes a metal inner cylinder member and a ceramic outer cylinder member, and a plurality of gaps are maintained so as to maintain a predetermined gap between the inner cylinder member and the outer cylinder member. with the ring-shaped member is disposed, a flange portion is formed on the outer peripheral side of the one end of the inner cylinder member, the said flange portion, the inner cylinder member to press the end surface of the outer cylinder member When the steel sheet heated to a high temperature is repeatedly conveyed, the inner cylinder member made of a metal and the outer cylinder made of a ceramic are provided by the conveyance roller structure provided with a plurality of pressing means for holding the outer cylinder member. The dimensional difference caused by the difference in thermal expansion between the members can be offset by a predetermined gap provided between the two members, and the ceramic outer cylinder member can be prevented from being damaged.

また、本発明の搬送用ローラによれば、前記セラミック製の外筒部材を、軸方向は前記押圧手段で、円周方向はリング状部材と外筒部材内面との摩擦力で強固に固定できるため、セラミック製の外筒部材の固定が緩まず、金属製の内筒部材との摩擦により摩耗することがないため、ローラの寿命を著しく向上させることができる。また、前記押圧手段が前記フランジ部に複数配置されているため、外筒部材の固定に用いられる押圧力を増加させることができ、内筒部材と外筒部材との固定をより強固なものとすることができる。
According to the conveying roller of the present invention, the ceramic outer cylinder member can be firmly fixed by the frictional force between the ring-shaped member and the inner surface of the outer cylinder member in the axial direction by the pressing means in the axial direction. For this reason, the ceramic outer cylinder member is not loosely fixed and is not worn by friction with the metal inner cylinder member, so that the life of the roller can be significantly improved. Further, since a plurality of the pressing means are arranged on the flange portion, the pressing force used for fixing the outer cylinder member can be increased, and the fixing between the inner cylinder member and the outer cylinder member can be made stronger. can do.

さらに、本発明の搬送用ローラによれば、前記内筒部材の他方の端部にリング状フランジ部材が取り付けられたときには、前記リング状フランジ部材を取り外せば、前記外筒部材と内筒部材とを容易に着脱可能である。また、内筒部材と外筒部材とを嵌合後に、前記リング状フランジ部材を内筒部材の端部に取り付ければ、内筒部材の一方端に設けられた前記フランジ部との間で外筒部材を容易に固定することができる。
Furthermore, according to the transport roller of the present invention, when a-ring-like flange member is attached to the other end portion of the front Symbol inner cylindrical member by removing the ring-like flange member, the outer cylinder member and the inner cylinder The member can be easily attached and detached. Moreover, if the said ring-shaped flange member is attached to the edge part of an inner cylinder member after fitting an inner cylinder member and an outer cylinder member, an outer cylinder will be provided between the said flange part provided in the one end of the inner cylinder member. The member can be easily fixed.

また、本発明の搬送用ローラによれば、前記押圧手段が、前記内筒部材の端部に固定された固定手段と、ばね部材と、前記外筒部材に当接する可動部材とからなるときには、ばね部材の弾性力を可動部材を介して外筒部材の表面に作用させ、外筒部材の軸方向の固定力を強めることができるため、外筒部材の内筒部材への固定をより強固なものとすることができる。 According to the conveying roller of the present invention, when the pressing means includes a fixing means fixed to an end portion of the inner cylinder member, a spring member, and a movable member that comes into contact with the outer cylinder member, Since the elastic force of the spring member can be applied to the surface of the outer cylinder member via the movable member and the axial fixing force of the outer cylinder member can be increased, the outer cylinder member can be more firmly fixed to the inner cylinder member. Can be.

また、本発明の搬送用ローラによれば、前記外筒部材の端部に段差が設けてあり、前記内筒部材の前記フランジ部および前記リング状フランジ部材が前記段差に収まっているときには、搬送用ローラの軸方向の幅を短くして搬送用ローラをコンパクト化でき、ローラを外筒部材の幅で隙間なく並列に配置することができるため、幅の広い鋼板のみでなく、幅の狭い鋼材や線材等も搬送することができる。 According to the conveying roller of the present invention, a step is provided at the end of the outer cylinder member, and when the flange portion of the inner cylinder member and the ring-shaped flange member are within the step, the conveyance roller The roller in the axial direction can be shortened to make the transport roller compact, and the rollers can be arranged in parallel with no gap in the width of the outer cylinder member, so that not only wide steel plates but also narrow steel materials And wire rods can also be transported.

また、本発明の搬送用ローラによれば、前記リング状部材が前記内筒部材に設けた溝に配置されているときには、リング状部材が内筒部材の幅方向でずれを生じる、あるいは幅方向にずれて外れることがないよう固定することができる。 According to the conveying roller of the present invention, when the ring-shaped member is disposed in the groove provided in the inner cylindrical member, the ring-shaped member is displaced in the width direction of the inner cylindrical member, or the width direction. It can be fixed so that it does not slip out of place.

また、本発明の搬送用ローラによれば、前記外筒部材が窒化珪素質セラミックスからなるときには、製造直後の加熱された鋼板を搬送した場合にも、外筒部材の表面と内筒部材の表面との温度差により生じる熱衝撃に充分耐えうるものとできるので、外筒部材に発生し易い亀裂や破損を防止することができる。 Further, according to the conveying roller of the present invention, when the outer cylinder member is made of silicon nitride ceramics, the surface of the outer cylinder member and the surface of the inner cylinder member can be used even when the heated steel sheet immediately after manufacture is conveyed. Therefore, it is possible to sufficiently withstand the thermal shock caused by the temperature difference between the two and the crack and breakage that are likely to occur in the outer cylindrical member.

以下、本発明の搬送用ローラの実施の形態の例について説明する。 Hereinafter, examples of embodiments of the transport roller of the present invention will be described.

図１（ａ）は本発明の搬送用ローラの実施の形態の一例の概略図を示す外筒部材の正面図であり、図１（ｂ）は（ａ）のＡ−Ａ’線での断面図であり、図１（ｃ）は（ｂ）におけるＳ部の拡大図である。 Fig.1 (a) is a front view of the outer cylinder member which shows the schematic of an example of embodiment of the conveyance roller of this invention, FIG.1 (b) is the cross section in the AA 'line of (a). FIG. 1C is an enlarged view of the S part in FIG.

本発明の搬送用ローラ１は、回転軸４の外周部に嵌合された金属製の内筒部材２と、内筒部材２の外周部に嵌合されたセラミック製の外筒部材３と、内筒部材２の一方端に形成されたフランジ部５と、内筒部材２の他方端に締結されたリング状フランジ部材６と、内筒部材２と外筒部材３との間の隙間９を維持するためのリング状部材７と、フランジ部５に設けられた、外筒部材３の軸方向の固定を強固に行なうための複数の押圧手段８とから構成されている。
The conveying roller 1 of the present invention includes a metal inner cylinder member 2 fitted to the outer peripheral portion of the rotating shaft 4, a ceramic outer cylinder member 3 fitted to the outer peripheral portion of the inner cylinder member 2, A flange portion 5 formed at one end of the inner cylinder member 2, a ring-shaped flange member 6 fastened to the other end of the inner cylinder member 2, and a gap 9 between the inner cylinder member 2 and the outer cylinder member 3. It comprises a ring-shaped member 7 for maintaining, and a plurality of pressing means 8 provided on the flange portion 5 for firmly fixing the outer cylinder member 3 in the axial direction.

本発明の搬送用ローラ１の特徴の１つは、図１（ｃ）に示すように、金属製の内筒部材２の外周部に、所定の隙間９を維持するようにセラミック製の外筒部材３が嵌合された構造をしていることである。この隙間９は、搬送されてきた高温の鋼板や線材と搬送用ローラ１が接触し、搬送用ローラ１が加熱された際に、金属製の内筒部材２とセラミック製の外筒部材３との熱膨張による寸法差を吸収するために設けられている。隙間９の大きさについては、外筒部材３に用いられるセラミックスと内筒部材２に用いられる金属とのそれぞれの熱伝導率および熱膨張係数と、搬送用ローラ１上を搬送される鋼板や線材の温度とから、両者間の熱膨張差を算出することによって決定され、数μｍから数ｍｍの値となる。隙間９が熱膨張による寸法差より小さいと、金属製の内筒部材２が隙間９の値を超えて膨張するため、セラミック製の外筒部材３の内面に円周方向への引張応力がかかることとなる。そして、この応力がセラミック製の外筒部材３の段差部等の応力集中し易い箇所に集中すると、セラミック製の外筒部材３の一部に亀裂や破損を生じてしまう。また、隙間９が熱膨張による寸法差より大きすぎると、外筒部材３と内筒部材２との円周方向の固定ができないようになる。よって、外筒部材３のみが円周方向へ空回りし、内筒部材２やそのフランジ部５やリング状フランジ部材６と摩擦するため、各部材が摩耗し、変形して、搬送用ローラ１の寿命が著しく低下することとなる。 As shown in FIG. 1C, one of the features of the conveying roller 1 of the present invention is a ceramic outer cylinder so as to maintain a predetermined gap 9 in the outer peripheral portion of the metal inner cylinder member 2. That is, the member 3 has a fitted structure. The gap 9 is formed between the metallic inner cylindrical member 2 and the ceramic outer cylindrical member 3 when the conveying roller 1 is heated when the conveyed high-temperature steel plate or wire is in contact with the conveying roller 1. It is provided in order to absorb a dimensional difference due to thermal expansion. Regarding the size of the gap 9, the thermal conductivity and thermal expansion coefficient of the ceramic used for the outer cylinder member 3 and the metal used for the inner cylinder member 2, and the steel sheet or wire conveyed on the conveying roller 1 From this temperature, it is determined by calculating the difference in thermal expansion between the two, resulting in a value of several μm to several mm. If the gap 9 is smaller than the dimensional difference due to thermal expansion, the metallic inner cylinder member 2 expands beyond the value of the gap 9, so that a tensile stress in the circumferential direction is applied to the inner surface of the ceramic outer cylinder member 3. It will be. If this stress is concentrated at a portion where the stress is easily concentrated, such as a stepped portion of the ceramic outer cylinder member 3, a part of the ceramic outer cylinder member 3 is cracked or damaged. If the gap 9 is too larger than the dimensional difference due to thermal expansion, the outer cylinder member 3 and the inner cylinder member 2 cannot be fixed in the circumferential direction. Accordingly, only the outer cylinder member 3 is idled in the circumferential direction and rubs against the inner cylinder member 2, its flange portion 5 and the ring-shaped flange member 6. The service life will be significantly reduced.

そして、この隙間９を内筒部材２と外筒部材３間の円周方向の全体にわたって保持する方法としては、まず内筒部材２の外周面に複数設けられた凹部に、凹部の深さよりも線径の大きなリング状部材７を嵌める。その後、内筒部材２に外筒部材３を嵌合させれば、この凹部から突出するリング状部材７により隙間９を保持するとともに、外筒部材３の円周方向の固定を行なうことができる。 And as a method of holding this gap 9 over the entire circumference in the circumferential direction between the inner cylinder member 2 and the outer cylinder member 3, first, a plurality of recesses provided on the outer peripheral surface of the inner cylinder member 2 are made to have a depth greater than the depth of the recess. A ring-shaped member 7 having a large wire diameter is fitted. Then, if the outer cylinder member 3 is fitted to the inner cylinder member 2, the gap 9 is held by the ring-shaped member 7 protruding from the recess, and the outer cylinder member 3 can be fixed in the circumferential direction. .

また、内筒部材２と外筒部材３との軸方向の固定は、まず外筒部材３を内筒部材２に嵌合した後に、内筒部材２の端部に設けられた雄ネジ部と、リング状フランジ部材６の内径に設けられた雌ネジ部とを締結固定する。その後、内筒部材２の他方端のフランジ部５に設けられた複数の押圧手段８により外筒部材３を側面から押圧することによって、押圧手段８とリング状フランジ部６との間で外筒部材３が軸方向に安定して固定される。
Further, the axial fixation between the inner cylinder member 2 and the outer cylinder member 3 is performed by first fitting the outer cylinder member 3 to the inner cylinder member 2, and then the male screw portion provided at the end of the inner cylinder member 2. The internal thread portion provided on the inner diameter of the ring-shaped flange member 6 is fastened and fixed. Thereafter, the outer cylinder member 3 is pressed from the side by a plurality of pressing means 8 provided on the flange portion 5 at the other end of the inner cylinder member 2, so that the outer cylinder is interposed between the pressing means 8 and the ring-shaped flange portion 6. The member 3 is stably fixed in the axial direction.

なお、押圧手段８は、例えば図１（ｃ）に示すようなボルトからなる固定手段８ａと、皿ばねや板ばねからなるばね部材８ｂと、外筒部材３と先端部が接触する凸部を有した可動部材８ｃとから構成されており、ボルトからなる固定手段８ａを締め付けると、ばね部材８ｂにより可動部材８ｃが外筒部材３の側面方向に移動し、可動部材８ｃの凸部の先端部が外筒部材３の側面に接触し押圧して、外筒部材３は軸方向が固定される。
ここで、押圧手段８の設置が１ヶ所である場合には、外筒部材３の側面１ヶ所を部分的に押圧するのみとなり、その軸方向を強固に固定することが困難となる。また、１ヶ所の固定では、搬送用ローラ１の使用時の振動等が押圧手段８の固定手段８ａに集中して伝わ
り、ねじに緩みが生じる場合も考えられる。よって、押圧手段８は、内筒部材２のフランジ部５に少なくとも２ヶ所以上の複数ヶ所設置される。
さらに、押圧手段８は、フランジ部５において、内筒部材２の穴部22を中心として、図１（ａ）に示すように左右対称となるように配置されるのが良い。これにより、外筒部材３の側面へ均等に押圧力を付与することができ、外筒部材３の軸方向の固定をより強固なものとすることができる。
The pressing means 8 includes, for example, a fixing means 8a made of a bolt as shown in FIG. 1 (c), a spring member 8b made of a disc spring or a leaf spring, and a convex portion where the outer cylinder member 3 and the tip end portion are in contact. When the fixing means 8a made of a bolt is tightened, the movable member 8c is moved in the lateral direction of the outer cylinder member 3 by the spring member 8b, and the tip of the convex portion of the movable member 8c Comes into contact with and presses the side surface of the outer cylinder member 3, and the axial direction of the outer cylinder member 3 is fixed.
Here, when the pressing means 8 is installed at one place, only one side of the side surface of the outer cylinder member 3 is pressed, and it is difficult to firmly fix the axial direction. Further, when fixing at one place, vibrations and the like during use of the conveying roller 1 are concentrated and transmitted to the fixing means 8a of the pressing means 8.
In other words, it may be possible that the screw is loosened. Therefore, the pressing means 8 is installed in the flange portion 5 of the inner cylinder member 2 at a plurality of places of at least two places.
Furthermore, it is preferable that the pressing means 8 is arranged in the flange portion 5 so as to be symmetrical with respect to the hole portion 22 of the inner cylinder member 2 as shown in FIG. Thereby, a pressing force can be equally applied to the side surface of the outer cylinder member 3, and the axial fixation of the outer cylinder member 3 can be made stronger.

ここで、本発明の搬送用ローラ１を構成する各部材について詳細を説明する。 Here, the details of each member constituting the conveying roller 1 of the present invention will be described.

図２（ａ）は本発明の搬送用ローラにおける外筒部材の実施の形態の一例の概略図を示す正面図であり、図２（ｂ）は（ａ）のＡ−Ａ’線での断面図であり、図２（ｃ）は本発明の搬送用ローラにおける内筒部材の実施の形態の一例を示す正面図であり、図２（ｄ）は（ｃ）のＡ−Ａ’線での断面図である。 FIG. 2A is a front view showing a schematic view of an example of an embodiment of the outer cylinder member in the conveying roller of the present invention, and FIG. 2B is a cross-sectional view taken along the line AA ′ in FIG. FIG. 2 (c) is a front view showing an example of an embodiment of the inner cylinder member in the conveying roller of the present invention, and FIG. 2 (d) is a cross-sectional view taken along the line AA 'in FIG. 2 (c). It is sectional drawing.

外筒部材３は、高温の鋼板や線材と直接接触するために、耐熱性に優れ、鋼板や線材との耐磨耗性に優れるセラミックスにより構成する。このように、材質をセラミックスとすることによって、応力が集中せず亀裂の発生や破損防止を図り、かつ加工し易くして製造コスト低減を図るという点から、その形状は単純形状とする。例えば図２（ｂ）に示すように、円筒の両端内面に、内筒部材２のフランジ部５およびリング状フランジ部材６と嵌合可能な段差部21を設けた形状とするのが良い。具体的には、アルミナ，炭化珪素，窒化珪素，ジルコニアを主成分とするセラミックスを用いるのが良い。特に、窒化珪素は、高強度であり熱膨張係数も低く、繰り返し高温の鋼板等を搬送した場合にも亀裂や破損を生じることがなく耐久性に優れ、各種金属との耐摩耗性にも優れているために、窒化珪素を主成分とするセラミックスにより外筒部材３を構成すれば、従来よりも優れた耐久性を有する搬送用ローラ１とすることができる。 Since the outer cylinder member 3 is in direct contact with a high-temperature steel plate or wire, the outer cylinder member 3 is made of ceramics having excellent heat resistance and excellent wear resistance with respect to the steel plate or wire. In this way, by using ceramics as the material, the stress is not concentrated, the generation of cracks and breakage can be prevented, and the shape can be made simple to reduce the manufacturing cost. For example, as shown in FIG. 2 (b), it is preferable that a stepped portion 21 that can be fitted to the flange portion 5 of the inner cylinder member 2 and the ring-shaped flange member 6 is provided on the inner surfaces of both ends of the cylinder. Specifically, ceramics mainly composed of alumina, silicon carbide, silicon nitride, and zirconia are preferably used. In particular, silicon nitride has high strength and a low coefficient of thermal expansion, and is excellent in durability without cracking or breakage even when repeatedly transporting high-temperature steel sheets, etc., and excellent in wear resistance with various metals. Therefore, if the outer cylinder member 3 is made of ceramics containing silicon nitride as a main component, the conveying roller 1 having durability superior to conventional ones can be obtained.

内筒部材２は、図２（ｃ）および（ｄ）に示すように、中心に回転軸４に嵌合するための穴部22が設けられた円筒状をしており、内筒部材２の一方の端部には、押圧手段８と締結するための２段の座繰り部が設けられた座繰り穴23が施されたフランジ部５が、内筒部材２の他方の端部には、リング状フランジ部材６を取り付けるための雄ねじ部24が設けられている。なお、座繰り穴23の内周は、後に押圧手段８と締結するための雌ねじ部が設けてある。また、内筒部材２の外周部には、外筒部材３との隙間９を保持するリング状部材７を嵌合させるための凹部25が設けられている。凹部25の断面形状としてはＵ字状等の曲面形状を採用することも可能であるが、凹部25に嵌まるリング状部材７の断面形状に合わせて、どのような形状としても良い。 As shown in FIGS. 2 (c) and 2 (d), the inner cylinder member 2 has a cylindrical shape with a hole 22 for fitting into the rotation shaft 4 at the center. At one end portion, a flange portion 5 provided with a countersink hole 23 provided with a two-step countersink portion for fastening with the pressing means 8 is provided at the other end portion of the inner cylinder member 2. An external thread portion 24 for attaching the ring-shaped flange member 6 is provided. The inner periphery of the counterbore hole 23 is provided with a female screw portion for later fastening with the pressing means 8. Further, a concave portion 25 for fitting the ring-shaped member 7 that holds the gap 9 with the outer cylindrical member 3 is provided on the outer peripheral portion of the inner cylindrical member 2. As the cross-sectional shape of the concave portion 25, a curved surface shape such as a U-shape can be adopted, but any shape may be used according to the cross-sectional shape of the ring-shaped member 7 fitted into the concave portion 25.

内筒部材２を構成する金属としては、一般的な炭素鋼やステンレス鋼等を用いることも可能であり、穴部22に嵌合させる回転軸４との熱膨張差を考慮して、回転軸４と同材質のものを使用するのが良い。より好適には、熱膨張係数の値が低くなる金属同士を組み合わせた各種合金を用いれば、セラミック製の外筒部材３との熱膨張差を低く抑えることができ、その破損を防止することができる。 As the metal constituting the inner cylinder member 2, general carbon steel, stainless steel, or the like can be used. In consideration of the difference in thermal expansion from the rotary shaft 4 fitted in the hole 22, the rotary shaft The same material as 4 should be used. More preferably, by using various alloys in which metals having a low coefficient of thermal expansion are combined, the difference in thermal expansion from the outer cylinder member 3 made of ceramic can be kept low, and the breakage can be prevented. it can.

また、内筒部材２の凹部25に嵌合するリング状部材７の断面形状は、どのような形状としても良いが、作り易さと製造コストとを考慮して角形または円形とするのが良い。そして、リング状部材７の寸法は、内径が内筒部材２の凹部25の底部の外周に沿った寸法と同等もしくは同等以下とし、線径は凹部25の深さ以上とする。内径が内筒部材２の凹部25の底部の外周に沿った寸法より大きいと、凹部25に嵌合したリング状部材７が緩んだ状態となり、外筒部材３を回転軸４と平行に嵌合させることができなくなる。また、線径が凹部25の深さより小さいと、内筒部材２と外筒部材３との間に内筒部材２が熱膨張するだけの隙間９を有することができなくなり、外筒部材３の円周方向の固定が緩んだ状態となるために好ましくない。このリング状部材７を構成する材質としては、伸縮性のある耐熱性樹脂を用いるのが良く、例えば、ポリイミド，ポリアミド，ポリカーボネート，フッ素樹脂系等およびそれらの複合樹脂を用いるのが好適である。 In addition, the cross-sectional shape of the ring-shaped member 7 fitted into the concave portion 25 of the inner cylinder member 2 may be any shape, but is preferably a square shape or a circular shape in consideration of ease of manufacture and manufacturing cost. The dimensions of the ring-shaped member 7 are such that the inner diameter is equal to or less than or equal to the dimension along the outer periphery of the bottom of the recess 25 of the inner cylinder member 2 and the wire diameter is greater than or equal to the depth of the recess 25. If the inner diameter is larger than the dimension along the outer periphery of the bottom of the recess 25 of the inner cylinder member 2, the ring-shaped member 7 fitted in the recess 25 is loosened, and the outer cylinder member 3 is fitted in parallel with the rotary shaft 4. Can not be made. If the wire diameter is smaller than the depth of the recess 25, the inner cylinder member 2 cannot have a gap 9 between the inner cylinder member 2 and the outer cylinder member 3 for thermal expansion. This is not preferable because the circumferential fixation becomes loose. As a material constituting the ring-shaped member 7, it is preferable to use a heat-resistant resin having elasticity, and for example, it is preferable to use polyimide, polyamide, polycarbonate, fluororesin, or a composite resin thereof.

図３（ａ）は本発明の搬送用ローラにおけるリング状フランジ部材の実施の形態の一例の概略図を示す正面図であり、図３（ｂ）は（ａ）のＡ−Ａ’線での断面図であり、図３（ｃ）の（ｉ）〜（iii）はそれぞれ本発明の搬送用ローラにおける押圧手段を構成する固定手段，ばね部材，可動部材の正面図およびＡ−Ａ’線での断面図である。 FIG. 3A is a front view showing a schematic view of an example of an embodiment of the ring-shaped flange member in the conveying roller of the present invention, and FIG. 3B is a cross-sectional view taken along line AA ′ in FIG. FIG. 3 (c) is a cross-sectional view, and (i) to (iii) of FIG. FIG.

リング状フランジ部材６は、図３（ａ）に示すように、外観がリング状をしており、その内周面には、図３（ｂ）に示すように、内筒部材２の端部に設けられた雄ねじ部24に締結する雌ねじ部26が設けられている。リング状フランジ部材６の材質としては、熱膨張差を考慮すると内筒部材２と同材質で構成するのが良い。また、外筒部材３の軸方向は、押圧部材８とこのリング状フランジ部材６との間で固定されるため、リング状フランジ部材６の外径を内筒部材２のフランジ部５と同等の外径とすれば、外筒部材３を軸方向に強固に固定できるだけの接触面積を得ることができるので好ましい。 As shown in FIG. 3A, the ring-shaped flange member 6 has a ring-like appearance, and the inner peripheral surface has an end portion of the inner cylinder member 2 as shown in FIG. 3B. An internal thread portion 26 is provided to be fastened to the external thread portion 24 provided in The material of the ring-shaped flange member 6 is preferably composed of the same material as that of the inner cylinder member 2 in consideration of the difference in thermal expansion. Further, since the axial direction of the outer cylindrical member 3 is fixed between the pressing member 8 and the ring-shaped flange member 6, the outer diameter of the ring-shaped flange member 6 is equivalent to the flange portion 5 of the inner cylindrical member 2. An outer diameter is preferable because a contact area sufficient to firmly fix the outer cylinder member 3 in the axial direction can be obtained.

また、押圧部材８は、例えば図３（ｃ）の（ｉ），（ii），（iii）にそれぞれ正面図およびＡ−Ａ’線での断面図で示した部材により構成されている。図３（ｃ）の（ｉ）に示す部材は図１（ｃ）の固定手段８ａに、（ii）に示す部材は図１（ｃ）のばね部材８ｂに、（iii）に示す部材は図１（ｃ）の可動部材８ｃに相当する。 Further, the pressing member 8 is constituted by, for example, members shown in a front view and a cross-sectional view taken along line A-A ′ in (i), (ii), and (iii) of FIG. The member shown in (i) of FIG. 3 (c) is the fixing means 8a of FIG. 1 (c), the member shown in (ii) is the spring member 8b of FIG. 1 (c), and the member shown in (iii) is a figure. This corresponds to 1 (c) movable member 8c.

図３（ｃ）の（ｉ）に示す固定手段８ａは、雄ねじ部27とばね部材押圧部28とからなり、断面が凸形状である。雄ねじ部27は、内筒部材２の座繰り穴23の内周に設けられた雌ねじ部と締結固定できるようになっている。締結後、ばね部材押圧部28が（ii）に示すばね部材８ｂの表面29と接触する。固定手段８ａを座繰り穴23へより深く締結させると、ばね部材８ｂの表面29を押圧し、ばね部材８ｂが座繰り穴23の軸方向と平行に圧縮する構成となっている。圧縮したばね部材８ｂは、（iii）に示す可動部材８ｃのばね部材８ｂとの接触面30を押圧する。押圧された可動部材は、その先端部31により外筒部材３の側面を部分的に押圧するため、外筒部材３はリング状フランジ部材６との間で軸方向に固定されることとなる。固定手段８ａは内筒部材２と同様の金属を用いて作製するのが良く、ばね部材８ｂとしては炭素鋼，ばね鋼（ＳＵＰ），ステンレス鋼等を用いるのが良い。可動部材の材質としては、金属，セラミックスのどちらでも良いが、低コスト化を考慮すると、ステンレス鋼や炭素鋼等の一般的な金属を用いて作製するのが良い。 The fixing means 8a shown in (i) of FIG. 3 (c) includes a male screw portion 27 and a spring member pressing portion 28, and has a convex cross section. The male screw portion 27 can be fastened and fixed to a female screw portion provided on the inner periphery of the counterbore hole 23 of the inner cylinder member 2. After the fastening, the spring member pressing portion 28 comes into contact with the surface 29 of the spring member 8b shown in (ii). When the fixing means 8a is tightened more deeply into the countersink hole 23, the surface 29 of the spring member 8b is pressed, and the spring member 8b is compressed in parallel with the axial direction of the countersink hole 23. The compressed spring member 8b presses the contact surface 30 with the spring member 8b of the movable member 8c shown in (iii). Since the pressed movable member partially presses the side surface of the outer cylinder member 3 by the tip portion 31, the outer cylinder member 3 is fixed in the axial direction between the ring-shaped flange member 6. The fixing means 8a is preferably made of the same metal as the inner cylinder member 2, and the spring member 8b is preferably made of carbon steel, spring steel (SUP), stainless steel or the like. As the material of the movable member, either metal or ceramics may be used. However, considering cost reduction, it is preferable to use a general metal such as stainless steel or carbon steel.

また、外筒部材３の両端部には、内筒部材２のフランジ部５およびリング状フランジ部材６と嵌合可能な段差部21が設けられているが、この段差部21は、内筒部材２のフランジ部５とリング状フランジ部材６とが収まる寸法とすることが好ましい。これにより、内筒部材２のフランジ部５およびリング状フランジ部材６は、外筒部材３の段差部21に収まっていることとなる。このような構成であれば、本発明の搬送用ローラ１の軸方向の幅をより短くして搬送用ローラ１をコンパクト化することができ、搬送用ローラ１を外筒部材３の幅で隙間なく並列に配置することができるため、幅の広い鋼板のみでなく、幅の狭い鋼材や線材等の搬送も実施することができる。内筒部材２のフランジ部５およびリング状フランジ部材６が段差部21に収まっていない場合には、搬送用ローラ１を並列に配置すると、段差部21に収まっていないフランジ部５およびリング状フランジ部材６同士が接触するため、外筒部材３の幅で搬送用ローラ１を並列に配置できず、搬送用ローラ１間に隙間を生じることとなる。このような構成では、搬送用ローラ１間の隙間より細い線材や幅の狭い鋼板は、その隙間に落下するおそれがあるため好ましくない。 Further, at both ends of the outer cylinder member 3, there are provided step portions 21 that can be fitted to the flange portion 5 and the ring-shaped flange member 6 of the inner cylinder member 2. It is preferable that the second flange portion 5 and the ring-shaped flange member 6 be dimensioned. As a result, the flange portion 5 and the ring-shaped flange member 6 of the inner cylinder member 2 are accommodated in the stepped portion 21 of the outer cylinder member 3. With such a configuration, it is possible to make the conveying roller 1 compact by reducing the width in the axial direction of the conveying roller 1 of the present invention, and the conveying roller 1 is spaced by the width of the outer cylinder member 3. Since it can arrange | position in parallel, not only a wide steel plate but conveyance of a narrow steel material, a wire, etc. can be implemented. When the flange portion 5 and the ring-shaped flange member 6 of the inner cylinder member 2 are not accommodated in the stepped portion 21, the flange portion 5 and the ring-shaped flange that are not accommodated in the stepped portion 21 when the conveying roller 1 is arranged in parallel. Since the members 6 are in contact with each other, the conveying rollers 1 cannot be arranged in parallel with the width of the outer cylinder member 3, and a gap is generated between the conveying rollers 1. In such a configuration, a wire rod thinner than the gap between the conveyance rollers 1 or a steel plate having a narrow width is not preferable because it may fall into the gap.

このような構成の本発明の搬送用ローラ１は、図４に示すような鋼板や線材の搬送ライン用として用いても、搬送用ローラ１を構成する金属部材とセラミック部材との熱膨張差により応力が発生し、これが低強度の部分に集中してセラミック部材が破損することがなく、長期間に渡って良好な搬送を実施することが可能である。 Even if the conveyance roller 1 of the present invention having such a configuration is used for a conveyance line of a steel plate or a wire as shown in FIG. 4, due to the difference in thermal expansion between the metal member and the ceramic member constituting the conveyance roller 1. Stress is generated and concentrated on the low-strength portion, and the ceramic member is not damaged. Good conveyance can be performed over a long period of time.

以上、本発明の実施の形態の例について説明したが、本発明の搬送用ローラ１は上述の内容に限定されるものでなく、その要旨を逸脱しない範囲内であれば種々変更をしてもよいことは言うまでもない。例えば、内筒部材２と外筒部材３とが金属−金属あるいはセラミックス−セラミックスの組合せであっても、両者間に熱膨張差があり、熱膨張差により発生する応力で変形や破損等の問題を生じる場合には、本発明の搬送用ローラ１の構造とすれば問題を解決できる。 As mentioned above, although the example of embodiment of this invention was demonstrated, the roller 1 for conveyance of this invention is not limited to the above-mentioned content, Even if it changes in the range which does not deviate from the summary, it is various. Needless to say, it is good. For example, even if the inner cylinder member 2 and the outer cylinder member 3 are a combination of metal-metal or ceramics-ceramics, there is a difference in thermal expansion between them, and problems such as deformation and breakage due to stress generated by the difference in thermal expansion If this occurs, the problem can be solved by adopting the structure of the conveying roller 1 of the present invention.

本発明の搬送用ローラの実施例を以下に示す。 Examples of the conveying roller of the present invention are shown below.

本発明の実施の形態の一例である図１に示した搬送用ローラ１を10個製造し、図４に概略構成を示す鋼板搬送ラインにて鋼板を搬送する試験を実施した。以下に詳細を示す。 Ten transport rollers 1 shown in FIG. 1 as an example of the embodiment of the present invention were manufactured, and a test for transporting a steel plate on a steel plate transport line having a schematic configuration shown in FIG. 4 was performed. Details are shown below.

＜外筒部材の製作＞
セラミック製の図２（ａ）に示す外筒部材３の製作を実施した。セラミック材料としては窒化珪素を用い、予め造粒された市販の窒化珪素２次原料を購入し、これを円筒形状の成形品が得られるゴム型に投入し、静水圧プレス成形装置（ラバープレス装置）を用いて成形した。しかる後、得られた窒化珪素成形体をゴム型から取り出し、焼成後に図１（ａ）に示す形状となるように切削加工を施した後、焼成炉にて焼成し、焼成後にさらに研削加工を施して、外径Ｂが300ｍｍ，内径Ｃが250ｍｍ，幅Ｄが200ｍｍであり、段差部21の内径Ｅが280ｍｍ，段差部21の軸に平行方向の深さＦが25ｍｍの窒化珪素製の外筒部材３を10個得た。 <Manufacture of outer cylinder member>
The outer cylinder member 3 shown in FIG. 2A made of ceramic was manufactured. Silicon nitride is used as the ceramic material. A commercially available secondary silicon nitride raw material is purchased, and this is put into a rubber mold from which a cylindrical shaped product can be obtained, and an isostatic press molding apparatus (rubber press apparatus) ). After that, the obtained silicon nitride molded body is taken out from the rubber mold, cut into a shape shown in FIG. 1A after firing, then fired in a firing furnace, and further subjected to grinding after firing. The outer diameter B is 300 mm, the inner diameter C is 250 mm, the width D is 200 mm, the inner diameter E of the stepped portion 21 is 280 mm, and the depth F in the direction parallel to the axis of the stepped portion 21 is 25 mm. Ten cylindrical members 3 were obtained.

＜内筒部材の製作＞
図２（ｃ）に示す内筒部材２の製作を実施した。予め購入した外径Ｇが280ｍｍのステンレス鋼棒を200ｍｍの長さで切り出し、この切り出したステンレス鋼の中心をフライス加工により内径Ｈが100ｍｍとなるように繰り抜き、円筒状とした。その後、円筒状のステンレス鋼の一方に肉厚Ｉが25ｍｍのフランジ部５を形成するため、円筒状のステンレス鋼のフランジ部５を除く外径部分Ｊを250ｍｍとなるように旋盤で加工し、円筒状のステンレス鋼の一方に肉厚Ｉが25ｍｍのフランジ部５を形成した。次いで、フランジ部５に押圧部材８を設置するための内径が10ｍｍの穴加工をボール盤にて施し、さらに加工した穴に内径が14ｍｍ，深さが13ｍｍと、内径が18ｍｍ，深さが10ｍｍとの２つの座繰り部を形成し、２段の座繰り部を有した座繰り穴23とした。そして、円筒状のステンレス鋼の外周部にリング状部材７を嵌合するため、深さが７ｍｍ，幅が10ｍｍの凹部25を旋盤による加工で等間隔に３ヶ所、内筒部材２の外周に形成した。その後、円筒状のステンレス鋼の他方の端部に、Ｍ250ｍｍの雄ねじ部24をねじ加工により形成し、さらに座繰り穴23の最外座繰り部の内径にＭ18ｍｍの雌ねじ部をねじ加工により形成し内筒部材２を10個得た。 <Production of inner cylinder member>
The inner cylinder member 2 shown in FIG. 2C was manufactured. A stainless steel rod having an outer diameter G of 280 mm purchased in advance was cut out to a length of 200 mm, and the center of the cut out stainless steel was drawn out by milling so that the inner diameter H became 100 mm, thereby forming a cylindrical shape. Thereafter, in order to form the flange portion 5 having a thickness I of 25 mm on one of the cylindrical stainless steels, the outer diameter portion J excluding the cylindrical stainless steel flange portion 5 is processed with a lathe so as to be 250 mm, A flange portion 5 having a wall thickness I of 25 mm was formed on one of cylindrical stainless steels. Next, a drilling machine having an inner diameter of 10 mm for installing the pressing member 8 on the flange portion 5 is applied by a drilling machine. Further, the processed hole has an inner diameter of 14 mm, a depth of 13 mm, an inner diameter of 18 mm, and a depth of 10 mm. The countersink hole 23 having a two-stage countersink portion was formed. Then, in order to fit the ring-shaped member 7 to the outer peripheral portion of the cylindrical stainless steel, three recesses 25 having a depth of 7 mm and a width of 10 mm are formed at equal intervals on the outer periphery of the inner cylindrical member 2 by machining with a lathe. Formed. Thereafter, an M250 mm male threaded portion 24 is formed on the other end of the cylindrical stainless steel by screwing, and an M18 mm female threaded portion is formed on the inner diameter of the outermost countersink portion of the countersink hole 23 by threading. Ten inner cylinder members 2 were obtained.

＜リング状フランジ部材の製作＞
図３（ａ）に示すリング状フランジ部材６として、外径Ｋが280ｍｍのステンレス鋼棒を20ｍｍの長さで切り出し、この切り出したステンレス鋼の中心部を内径Ｌが245ｍｍとなるように繰り抜き、その内径に内筒部材２の端部に形成した雄ねじ部24と締結可能なＭ250ｍｍの雌ねじ部26を形成し、リング状フランジ部材６を10個得た。 <Production of ring-shaped flange member>
As a ring-shaped flange member 6 shown in FIG. 3A, a stainless steel rod having an outer diameter K of 280 mm is cut out to a length of 20 mm, and the center portion of the cut stainless steel is drawn out so that the inner diameter L is 245 mm. The M250 mm female threaded portion 26 that can be fastened with the male threaded portion 24 formed at the end of the inner cylindrical member 2 was formed on the inner diameter, and ten ring-shaped flange members 6 were obtained.

＜押圧手段の製作＞
図３（ｃ）の（ｉ）に示す押圧手段８の固定手段８ａとして、外径が20ｍｍのステンレス鋼棒を15ｍｍの長さで切り出し、この切り出したステンレス鋼の一方に外径が13.5ｍｍ，長さが５ｍｍのばね部材押圧部28を形成した後、ばね部材押圧部28を除く外径部分にＭ18ｍｍの雄ねじ部27を旋盤加工およびねじ加工により形成し、固定手段８ａを40個得た。 <Production of pressing means>
As the fixing means 8a of the pressing means 8 shown in (i) of FIG. 3 (c), a stainless steel rod having an outer diameter of 20 mm is cut out with a length of 15 mm, and one of the cut stainless steels has an outer diameter of 13.5 mm, After the spring member pressing portion 28 having a length of 5 mm was formed, an M18 mm male screw portion 27 was formed on the outer diameter portion excluding the spring member pressing portion 28 by lathe processing and screw processing, and 40 fixing means 8a were obtained.

次に、図３（ｃ）の（ii）に示す押圧手段８のばね部材８ｂとして、市販の皿ばね（ＪＩＳＢ2706−2001 呼び７外径が14ｍｍ，厚さが0.5ｍｍ，高さが0.9ｍｍ）を用いた。 Next, as a spring member 8b of the pressing means 8 shown in (ii) of FIG. 3 (c), a commercially available disc spring (JIS B2706-2001 called 7 outer diameter is 14 mm, thickness is 0.5 mm, height is 0.9 mm. ) Was used.

また、図３（ｃ）の（iii）に示す押圧手段８の可動部材８ｃとして、外径が13.5ｍｍのステンレス鋼棒を10ｍｍの長さで切り出し、これに外径が9.5ｍｍ，長さが５ｍｍとなるように旋盤で加工して可動部材の先端部31を形成し、可動部材８ｃを40個得た。 Further, as the movable member 8c of the pressing means 8 shown in (iii) of FIG. 3 (c), a stainless steel rod having an outer diameter of 13.5 mm is cut out to a length of 10 mm. The leading end portion 31 of the movable member was formed by a lathe so as to be 5 mm, and 40 movable members 8c were obtained.

このような製造方法により押圧手段８を10セット製作した。 Ten sets of pressing means 8 were manufactured by such a manufacturing method.

＜リング状部材＞
リング状部材７としては、市販の耐熱200℃以上のフッ素樹脂系Ｏリング（ＪＩＳＢ2401−2005 呼びＰ235）30個を用いた。 <Ring-shaped member>
As the ring-shaped member 7, 30 commercially available fluororesin O-rings having a heat resistance of 200 ° C. or higher (JIS B2401-2005, called P235) were used.

＜組み立て工程＞
次に、それぞれ製作した搬送用ローラ１の部品同士を組み立てた。まず、内筒部材２の外周部に形成された凹部25に、リング状部材７を嵌合させ、その外周部に外筒部材３を嵌合させた。 <Assembly process>
Next, the parts of the produced conveyance roller 1 were assembled. First, the ring-shaped member 7 was fitted into the recess 25 formed in the outer peripheral portion of the inner cylindrical member 2, and the outer cylindrical member 3 was fitted into the outer peripheral portion.

ここで、ステンレス鋼製の内筒部材２の外径と窒化珪素製の外筒部材３の内径とはともに250ｍｍであるが、両者の熱伝導率と熱膨張係数の違いから、両部材の境界部は1000℃前後の鋼板を搬送した場合に約200℃となり、両部材間に0.7〜0.75ｍｍ程度の熱膨張差が発生する。よって、予め内筒部材２の外径を249.25〜249.3ｍｍ、外筒部材３の内径を250〜250.05ｍｍとし、この範囲内でそれぞれの部材を製作し、常温で予め最大0.8ｍｍの隙間９が生じるようにした。同様に、内筒部材２のフランジ部５と外筒部材３の段差部21の接触部についても、範囲を検討し、最大0.8ｍｍの隙間９を設けられるようにした。また、リング状部材７を内筒部材２の凹部25に嵌合後、軸方向に垂直な断面では、予めリング状部材７の一部が凹部から１〜1.4ｍｍ突出するようにしてあり、この突出部分の働きにより、リング状部材７を嵌合後の内筒部材２に外筒部材３を嵌めた場合に、内筒部材２と外筒部材３との間に0.8ｍｍの隙間９を維持することが可能となる。なお、リング状部材７の突出量は１〜1.4ｍｍであり、隙間９は0.8ｍｍであるため、良好な嵌合が実施できないことが考えられるが、リング状部材７は樹脂製であり、伸縮性するため問題なく嵌合することが可能である。 Here, both the outer diameter of the stainless steel inner cylinder member 2 and the inner diameter of the silicon nitride outer cylinder member 3 are 250 mm, but due to the difference in thermal conductivity and thermal expansion coefficient between the two, The part becomes about 200 ° C. when a steel plate of about 1000 ° C. is conveyed, and a thermal expansion difference of about 0.7 to 0.75 mm occurs between both members. Therefore, the outer diameter of the inner cylindrical member 2 is set to 249.25 to 249.3 mm in advance, and the inner diameter of the outer cylindrical member 3 is set to 250 to 250.05 mm. It was made to occur. Similarly, the range of the contact portion between the flange portion 5 of the inner cylinder member 2 and the step portion 21 of the outer cylinder member 3 was examined, and a gap 9 having a maximum length of 0.8 mm was provided. In addition, after the ring-shaped member 7 is fitted into the concave portion 25 of the inner cylinder member 2, in a cross section perpendicular to the axial direction, a part of the ring-shaped member 7 protrudes 1 to 1.4 mm from the concave portion in advance. A gap 9 of 0.8 mm is maintained between the inner cylinder member 2 and the outer cylinder member 3 when the outer cylinder member 3 is fitted to the inner cylinder member 2 after the ring-shaped member 7 is fitted by the function of the protruding portion. It becomes possible to do. In addition, since the protrusion amount of the ring-shaped member 7 is 1 to 1.4 mm and the gap 9 is 0.8 mm, it is considered that good fitting cannot be performed. However, the ring-shaped member 7 is made of a resin and can be expanded and contracted. Therefore, it is possible to fit without any problem.

次に、内筒部材２に外筒部材３を嵌合した後、内筒部材２の端部に設けられた雄ねじ部24にリング状フランジ部材６の雌ねじ部26を締結させた。そして、内筒部材２の座繰り穴23に押圧手段８となる可動部材８ｃを挿入して取り付け、次いで、ばね部材８ｂを挿入した後、固定手段８ａを座繰り穴23の内周部に設けられたねじ部と締結させた。押圧手段８を取り付け後は、可動部材８ｃの可動部材先端部31が、図１（ｃ）に示すように、外筒部材３の段差部21の側面に接触した状態となり、0.8ｍｍの隙間９が維持される構造となっている。 Next, after fitting the outer cylinder member 3 to the inner cylinder member 2, the female thread part 26 of the ring-shaped flange member 6 was fastened to the male thread part 24 provided at the end of the inner cylinder member 2. Then, the movable member 8c serving as the pressing means 8 is inserted and attached to the counterbore 23 of the inner cylinder member 2, and then the spring member 8b is inserted, and then the fixing means 8a is provided on the inner peripheral portion of the counterbore 23. Fastened with the threaded part. After the pressing means 8 is attached, the movable member tip 31 of the movable member 8c is in contact with the side surface of the step portion 21 of the outer cylinder member 3 as shown in FIG. Is maintained.

以上のようにして本発明の搬送用ローラ１を10個組み立てた。 Ten transport rollers 1 of the present invention were assembled as described above.

＜搬送試験＞
次に、組み立てた本発明の搬送用ローラ１を、温度が1000℃前後の鋼板を搬送するラインの回転軸４に取り付け、実際に鋼板を搬送する試験を実施した。なお、本発明の搬送用ローラ１と試験結果を比較するため、従来の窒化珪素部材と金属部材とを組合せた搬送用ローラを別ラインに同位置となるようにして回転軸４に取り付けた。試験は、長さが10ｍの鋼板を１日８時間搬送することを１週間繰り返し、試験後にローラに破損等がないか観察することにより、本発明の搬送用ローラ１の有効性を確認した。 <Transport test>
Next, the assembled conveyance roller 1 of the present invention was attached to the rotating shaft 4 of a line for conveying a steel plate having a temperature of about 1000 ° C., and a test for actually conveying the steel plate was performed. In order to compare the test results with the transport roller 1 of the present invention, a transport roller combining a conventional silicon nitride member and a metal member was attached to the rotary shaft 4 in the same position on a separate line. In the test, a steel sheet having a length of 10 m was transported for 8 hours a day for one week, and the effectiveness of the transport roller 1 of the present invention was confirmed by observing whether the roller was damaged after the test.

＜試験結果＞
搬送試験の結果、従来の搬送用ローラは、10個中全ての窒化珪素部材に亀裂が見られた。特に、試験中に窒化珪素部材が金属部材との熱膨張差により破損したものが５個もあり、破損の影響で鋼板との接触面に凹凸が生じ、搬送中の鋼板表面にこの凹凸が転写されて変形する不具合や、凸部との摩擦により搬送中の鋼板に傷ができるという不具合が生じ、良好な搬送が実施できなかった。 <Test results>
As a result of the conveyance test, cracks were found in all the silicon nitride members of the conventional conveyance rollers. In particular, there were five silicon nitride members that were damaged due to the difference in thermal expansion from the metal members during the test, and unevenness occurred on the contact surface with the steel plate due to the damage, and this unevenness was transferred to the surface of the steel plate being transferred. As a result, there is a problem that the steel sheet being transported is damaged due to a problem with deformation and friction with the convex part, and a satisfactory transport cannot be performed.

これと比較して、本発明の搬送用ローラ１は、長時間の搬送においても亀裂や破損等がなく良好な鋼板の搬送が実施でき、窒化珪素部材と金属部材との組合せによって構成された搬送用ローラであっても、本発明の搬送用ローラ１であれば、両部材の熱膨張差による亀裂や破損等がなく、良好に使用することが確認できた。さらに、鋼板との接触面が窒化珪素製であるため、鋼板との摩擦により多少の摩耗は生じているものの、極端な摩耗による鋼板接触面の変形等はなく、長期間に渡って良好に使用できることも確認できる結果であった。 Compared with this, the conveyance roller 1 of the present invention can carry a good steel plate without cracks or breakage even in a long-time conveyance, and is constituted by a combination of a silicon nitride member and a metal member. Even if it is a roller for conveyance, if it was the roller 1 for conveyance of this invention, it was confirmed that there was no crack, damage, etc. by the thermal expansion difference of both members, and it was used favorable. Furthermore, since the contact surface with the steel plate is made of silicon nitride, some wear has occurred due to friction with the steel plate, but there is no deformation of the steel plate contact surface due to extreme wear, etc., and it is used well over a long period of time It was a result that could be confirmed.

（ａ）は本発明の搬送用ローラの一例の概略図を示す正面図であり、（ｂ）は（ａ）のＡ−Ａ’線での断面図であり、（ｃ）は（ｂ）におけるＳ部の拡大図である。(A) is a front view which shows the schematic of an example of the conveyance roller of this invention, (b) is sectional drawing in the AA 'line of (a), (c) is in (b). It is an enlarged view of S section. （ａ）は本発明の搬送用ローラにおける外筒部材の実施の形態の一例の概略図を示す正面図であり、（ｂ）は（ａ）のＡ−Ａ’線での断面図であり、（ｃ）は本発明の搬送用ローラにおける内筒部材の実施の形態の一例の概略図を示す正面図であり、（ｄ）は（ｃ）のＡ−Ａ’線での断面図である。(A) is a front view which shows the schematic of an example of embodiment of the outer cylinder member in the roller for conveyance of this invention, (b) is sectional drawing in the AA 'line of (a), (C) is a front view which shows the schematic of an example of embodiment of the inner cylinder member in the roller for conveyance of this invention, (d) is sectional drawing in the AA 'line of (c). （ａ）は本発明の搬送用ローラにおけるリング状フランジ部材の実施の形態の一例の概略図を示す正面図であり、（ｂ）は（ａ）のＡ−Ａ’線での断面図であり、（ｃ）は本発明の搬送用ローラにおける押圧手段を構成する部材の一例の概略図を示しており、（ｉ）が固定手段の正面図およびＡ−Ａ’線での断面図であり、（ii）がばね部材の正面図およびＡ−Ａ’線での断面図であり、（iii）が可動部材の正面図およびＡ−Ａ’線での断面図である。(A) is a front view which shows the schematic of an example of embodiment of the ring-shaped flange member in the roller for conveyance of this invention, (b) is sectional drawing in the AA 'line of (a). , (C) shows a schematic view of an example of a member constituting the pressing means in the conveying roller of the present invention, (i) is a front view of the fixing means and a cross-sectional view along the line AA ′, (Ii) is a front view of the spring member and a sectional view taken along the line AA ′, and (iii) is a front view of the movable member and a sectional view taken along the line AA ′. 従来および本発明の搬送用ローラが用いられる熱間圧延ラインにおける鋼板や鉄鋼線材等の次工程への運搬ラインの概略図である。It is the schematic of the conveyance line to the following processes, such as a steel plate and a steel wire, in the hot rolling line where the conveyance roller of the past and the present invention is used.

符号の説明Explanation of symbols

１：搬送用ローラ
２：内筒部材
３：外筒部材
４：回転軸
５：フランジ部
６：リング状フランジ部材
７：リング状部材
８：押圧手段
８ａ：固定手段
８ｂ：ばね部材
８ｃ：可動部材
９：隙間
21：段差部
22：穴部
23：座繰り穴
24，27：雄ねじ部
25：凹部
26：雌ねじ部
28：ばね部材押圧部
29：ばね部材表面
30：接触面
31：可動部材先端部 1: Conveying roller 2: Inner cylinder member 3: Outer cylinder member 4: Rotating shaft 5: Flange portion 6: Ring-shaped flange member 7: Ring-shaped member 8: Pressing means 8a: Fixing means 8b: Spring member 8c: Movable member 9: Clearance
21: Stepped part
22: Hole
23: counterbore
24, 27: Male thread
25: Recess
26: Female thread
28: Spring member pressing part
29: Spring member surface
30: Contact surface
31: Movable member tip

Claims

金属製の内筒部材とセラミック製の外筒部材とからなり、前記内筒部材と前記外筒部材との間に所定の隙間を維持するように複数のリング状部材が配置されているとともに、前記内筒部材の一方端部の外周側にフランジ部が形成されており、該フランジ部に、前記外筒部材の端面を押圧して前記内筒部材が前記外筒部材を保持する複数の押圧手段が設けられていることを特徴とする搬送用ローラ。 Consists of a outer cylinder member of the inner cylindrical member and the ceramic made of metal, with a plurality of ring-shaped member is arranged to maintain a predetermined gap between the outer cylinder member and the inner tubular member, A flange portion is formed on the outer peripheral side of the one end portion of the inner cylinder member, and a plurality of presses by which the inner cylinder member holds the outer cylinder member by pressing the end surface of the outer cylinder member against the flange portion. Means is provided for conveying rollers.

前記内筒部材の他方の端部にリング状フランジ部材が取り付けられていることを特徴とする請求項１に記載の搬送用ローラ。 Carrying roller according to claim 1, characterized that you have-ring-like flange member is attached to the other end of the front Symbol inner cylinder member.

前記押圧手段が、前記内筒部材の端部に固定された固定手段と、ばね部材と、前記外筒部材に当接する可動部材とからなることを特徴とする請求項１または２に記載の搬送用ローラ。 3. The transport according to claim 1, wherein the pressing unit includes a fixing unit that is fixed to an end of the inner cylinder member, a spring member, and a movable member that contacts the outer cylinder member. Roller.

前記外筒部材の端部に段差が設けてあり、前記内筒部材の前記フランジ部および前記リング状フランジ部材が前記段差に収まっていることを特徴とする請求項２または３のいずれかに記載の搬送用ローラ。 The step is provided in the edge part of the said outer cylinder member, The said flange part and the said ring-shaped flange member of the said inner cylinder member are settled in the said level | step difference, either. Conveyor roller.

前記リング状部材が前記内筒部材に設けた溝に配置されたことを特徴とする請求項１〜４のいずれかに記載の搬送用ローラ。 Carrying roller according to any one of claims 1 to 4, characterized in that said ring-shaped member is disposed in a groove provided in the inner cylinder member.

前記外筒部材が窒化珪素質セラミックスからなることを特徴とする請求項１〜５のいずれかに記載の搬送用ローラ。 Carrying roller according to any one of claims 1 to 5, characterized in that the outer cylinder member is made of silicon nitride ceramics.