JP4959496B2

JP4959496B2 - Conveyor roller

Info

Publication number: JP4959496B2
Application number: JP2007251573A
Authority: JP
Inventors: 顕光神田
Original assignee: Kyocera Corp
Current assignee: Kyocera Corp
Priority date: 2007-09-27
Filing date: 2007-09-27
Publication date: 2012-06-20
Anticipated expiration: 2027-09-27
Also published as: JP2009082926A

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 the steel plate and wire immediately after being heated and rolled to a high temperature of 1000 ° C. or higher to the next product processing line or storage location.

図５は、複数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搬送の様子を示す、運搬ラインの概略図である。 FIG. 5 is a schematic diagram of a transport line showing a state of transport to a subsequent process such as a steel plate or steel wire in a hot rolling line in which a plurality of transport rollers are used.

図５に示すように、熱間圧延ラインには複数の搬送用ローラ51が設置されており、熱間圧延直後の鉄鋼線材あるいは鋼板52は、搬送ローラ51上に載置され、不図示の回転駆動機構の回転駆動により回転軸53に取り付けられた搬送用ローラ51を回転させることによって、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. 5, a plurality of conveying rollers 51 are installed in the hot rolling line, and the steel wire or steel plate 52 immediately after the hot rolling is placed on the conveying rollers 51 and rotated (not shown). By rotating the conveying roller 51 attached to the rotating shaft 53 by the rotational driving of the driving mechanism, the conveying mechanism 51 is conveyed to the next product processing line or storage place ahead of the arrow direction.

この熱間圧延ラインで用いる搬送用ローラ51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52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と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 51 used in this hot rolling line, but the metal roller is likely to wear due to friction with the steel plate 52 and is inferior in heat resistance. A ceramic roller having wear resistance and heat resistance is used.

しかし、全体をセラミック製とした搬送用ローラ51は、磨耗に対する寿命という観点では望ましいが、高価であり、また複雑な形状や大型の搬送用ローラ51の製造は困難であった。 However, the transfer roller 51 made entirely of ceramic is desirable from the viewpoint of wear life, but is expensive, and it is difficult to manufacture a complicated shape or a large transfer roller 51.

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ている。このような搬送用ローラとすれば、鋼板が接触する搬送用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 made the other part metal is used. With such a transfer roller, only the outer periphery of the transfer roller that contacts the steel plate is made of ceramic, so the cost can be reduced, and even with complicated shapes and large transfer rollers, ceramic If the member has a simple cylindrical configuration, 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（熱膨張率はセラミックス：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んで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. The difference in thermal expansion between the ceramic member and the metal member is generally very large (the coefficient of thermal expansion is ceramic: 2-8 × 10 ⁻⁶ / ° C., metal: 10-20 × 10 ⁻⁶ / ° C.). Due to the difference in thermal expansion between the member and the metal member, the ceramic member is damaged, or the ceramic member and the metal member are loosely fixed and idle.

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製ロールであって、１個または複数個のセラミック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, and is configured by fitting one or a plurality of ceramic sleeves to 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

しかしながら、特許文献１に提案されているセラミック製のローラ部材の構造では、セラミック製の円筒状ローラ部材の端面に設けられた複数の固定穴に、金属フランジに配置された複数のピンの先端部分を挿入することにより、ローラ部材の空回りを防止することが記載されているが、このような構造では、鋼板等の搬送物は重量物であるため、ピンに荷重が集中してしまい、ピンが荷重に耐えきれず破損するおそれがある。ピンが破損すると、ローラ部材が空回りして、摩擦により金属フランジのローラ部材との接触部が磨耗する。このため、ローラ部材の固定はますます緩み、ひどい場合には、ローラ部材が金属軸の中心線に対して垂直に固定されず傾いて固定された状態となり、ローラ部材の表面が搬送物に片当たりして、搬送物の表面に傷をつけるおそれがあった。 However, in the structure of the ceramic roller member proposed in Patent Document 1, the tip portions of the plurality of pins arranged on the metal flange are provided in the plurality of fixing holes provided on the end surface of the ceramic cylindrical roller member. Although it is described that the roller member is prevented from idling by inserting a roller, in such a structure, since the transported object such as a steel plate is heavy, the load is concentrated on the pin, There is a risk of damage due to inability to withstand the load. When the pin is broken, the roller member is idled and the contact portion of the metal flange with the roller member is worn by friction. For this reason, the roller member is fixed more and more loosely. In a severe case, the roller member is not fixed perpendicularly to the center line of the metal shaft, but is tilted and fixed. There was a risk of hitting and scratching the surface of the conveyed product.

また、特許文献２に提案されている搬送用ローラの構造では、軸材に中空円筒体であるセラミック製スリーブを金属製スリーブと交互に嵌め、これを軸材の両端から弾性部材を介して金属製締結部材で挟着したものであり、セラミック製スリーブの端面を金属製スリーブの端面および金属締結部材の端面で固定するため、ピンで固定した場合と比較してピンに荷重が集中して破損する等の不具合がなく、セラミック製スリーブの円周方向への空回りは防止することができると考えられる。しかしながら、搬送物を搬送する場合のセラミック製スリーブと金属製スリーブおよび金属締結部材との軸方向への熱膨張を考慮していないために、搬送の繰り返しによる熱サイクルで金属締結部材が膨張収縮を繰り返すうち、固定が緩みセラミック製スリーブが空回りしてしまい、搬送する鋼板の表面に傷や凹凸が生じるおそれがある。 Further, in the structure of the conveying roller proposed in Patent Document 2, ceramic sleeves, which are hollow cylindrical bodies, are alternately fitted to the shaft member with metal sleeves, and the metal sleeves are connected to the metal members via elastic members from both ends of the shaft member. It is clamped with a fastening member made of ceramic, and the end face of the ceramic sleeve is fixed with the end face of the metal sleeve and the end face of the metal fastening member. It is considered that there is no malfunction such as, and the idle rotation of the ceramic sleeve in the circumferential direction can be prevented. However, since the thermal expansion in the axial direction of the ceramic sleeve, the metal sleeve, and the metal fastening member when transporting the conveyed product is not taken into consideration, the metal fastening member expands and contracts in the thermal cycle due to repeated transportation. During the repetition, the fixing is loosened and the ceramic sleeve is idled, which may cause scratches and irregularities on the surface of the steel sheet to be conveyed.

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 an object of the present invention is to provide a conveying roller that can convey a high-temperature steel sheet without loosening the fixing of the ceramic member and the metal member. .

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、前記内筒部材の端部の外周側に設けた複数の押圧手段が、シート状部材を介して前記外筒部材の端面を押圧することにより、前記内筒部材が外筒部材を保持し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 pressing means provided on the outer peripheral side of the end portion of the inner cylinder member are interposed via a sheet-like member. The inner cylinder member holds the outer cylinder member by pressing the end surface of the outer cylinder member.

また、本発明の搬送用ローラは、上記構成において、前記シート状部材が前記外筒部材の端面に沿ったリング状であ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 the above configuration, the sheet-like member is a ring shape along the end surface of the outer cylinder member.

また、本発明の搬送用ローラは、上記いずれかの構成において、前記シート状部材が金属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 any of the above-described configurations, the sheet-like member is made of metal.

また、本発明の搬送用ローラは、上記いずれかの構成において、前記シート状部材の表面の算術平均高さ（Ｒａ）が0.5〜50μｍであることを特徴とするものである。 Moreover, the conveyance roller of this invention is characterized by the arithmetic mean height (Ra) of the surface of the said sheet-like member being 0.5-50 micrometers in either of the said structures.

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、前記内筒部材の端部の外周側に設けた複数の押圧手段が、シート状部材を介して前記外筒部材の端面を押圧することにより、従来の構造よりも外筒部材の端面の押圧面積を増加させ、外筒部材の端面に対する摩擦力を高めて、外筒部材を安定して保持し回転させることができるとともに、熱サイクルを受けた場合にも押圧手段により軸方向の固定が緩まないため、外筒部材が空回りすることを防止することができる。また、外筒部材に異常な外力が加わって、そのまま回転させたのでは外筒部材または内筒部材が破損しかねない状態になったときには、シート状部材と外筒部材の端面との間で、あるいはシート状部材と押圧手段との間で過大な抵抗力に対しては滑るようにもできるため、そのような状態に対して、ピンが破損するような問題を起こすことなく、外筒部材または内筒部材が破損することを防止することもできる。 According to the conveying roller of the present invention, the inner cylinder member made of metal and the outer cylinder member made of ceramic are provided, and the plurality of pressing means provided on the outer peripheral side of the end portion of the inner cylinder member are formed of the sheet-like member. By pressing the end surface of the outer cylinder member through the conventional structure, the pressing area of the end surface of the outer cylinder member is increased compared to the conventional structure, the frictional force against the end surface of the outer cylinder member is increased, and the outer cylinder member is stabilized. While being able to hold | maintain and rotate, since an axial fixing is not loosened by a press means also when it receives a thermal cycle, it can prevent that an outer cylinder member rotates idly. In addition, when an abnormal external force is applied to the outer cylinder member and the outer cylinder member or the inner cylinder member is in a state where the outer cylinder member or the inner cylinder member may be damaged if it is rotated as it is, the sheet-like member and the end surface of the outer cylinder member Or, it is possible to slide against an excessive resistance force between the sheet-like member and the pressing means, so that the outer cylinder member does not cause a problem that the pin is damaged in such a state. Or it can also prevent that an inner cylinder member is damaged.

また、本発明の搬送用ローラによれば、前記シート状部材が前記外筒部材の端面に沿ったリング状であるときには、外筒部材の端面とシート状部材との接触面積を外筒部材の端面の全周にわたって確保してさらに増加させることができ、外筒部材の内筒部材へのより強固な固定を行なうことが可能となる。また、シート状部材がリング状であれば、搬送用ローラの組み立て時に、接着剤やテープ等の固定手段を用いなくても、押圧手段と外筒部材の端面との間にシート状部材を容易に配置することができる。 Further, according to the conveying roller of the present invention, when the sheet-like member is in a ring shape along the end surface of the outer cylinder member, the contact area between the end surface of the outer cylinder member and the sheet-like member is reduced. It can be ensured over the entire circumference of the end face and further increased, and the outer cylinder member can be more firmly fixed to the inner cylinder member. If the sheet-like member is ring-shaped, the sheet-like member can be easily placed between the pressing means and the end surface of the outer cylindrical member without using a fixing means such as an adhesive or a tape when assembling the conveying roller. Can be arranged.

さらに、本発明の搬送用ローラによれば、前記シート状部材が金属からなるときには、押圧手段で前記シート状部材の数ヶ所に局所的に強い押圧力を加えた際にもシート状部材が破損することがなく、良好な外筒部材への押圧力の付与を長期間にわたって維持することができる。 Furthermore, according to the conveying roller of the present invention, when the sheet-like member is made of metal, the sheet-like member is damaged even when a strong pressing force is locally applied to several portions of the sheet-like member by the pressing means. Therefore, it is possible to maintain a good pressing force applied to the outer cylinder member over a long period of time.

また、本発明の搬送用ローラによれば、前記シート状部材の表面の算術平均高さ（Ｒａ）が0.5〜50μｍであるときには、シート状部材と外筒部材の端面との接触部における摩擦力を適度に増加させることができ、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可能となる。また、回転に対する過大な抵抗力に対しては、外筒部材の端面または押圧手段との間で適度に滑らせることができ、外筒部材または内筒部材が破損することをより確実に防止することも可能となる。 Moreover, according to the conveying roller of the present invention, when the arithmetic average height (Ra) of the surface of the sheet-like member is 0.5 to 50 μm, the frictional force at the contact portion between the sheet-like member and the end surface of the outer cylinder member Can be increased moderately, and the outer cylinder member can be more firmly fixed to the inner cylinder member. Further, with respect to excessive resistance to rotation, the outer cylinder member can be appropriately slid between the end surface of the outer cylinder member or the pressing means, and the outer cylinder member or the inner cylinder member can be more reliably prevented from being damaged. It is also possible.

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は、本発明の搬送用ローラの実施の形態の一例を示す、（ａ）は正面図であり、（ｂ）は（ａ）における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。 1A and 1B show an example of an embodiment of a conveying roller according to the present invention. FIG. 1A is a front view, FIG. 1B is a cross-sectional view taken along line AA ′ in FIG. ) Is an enlarged view of the S part in (b).

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、フランジ部５に設けられた、外筒部材３の軸方向の固定を行なうための押圧手段７と、押圧手段７と外筒部材３の一方の端面との間に配置されたシート状部材８とから構成されている。また、金属製の内筒部材２とセラミック製の外筒部材３との間には、高温の鋼板を搬送した際に鋼板と接触する外筒部材３を通して伝わる熱によって金属製の内筒部材２が膨張することを考慮した、隙間９が設けられている。 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 an axial direction of the outer cylinder member 3 provided at the flange portion 5 It comprises a pressing means 7 for fixing, and a sheet-like member 8 disposed between the pressing means 7 and one end surface of the outer cylinder member 3. Further, between the metal inner cylinder member 2 and the ceramic outer cylinder member 3, the metal inner cylinder member 2 is heated by the heat transmitted through the outer cylinder member 3 that comes into contact with the steel plate when the high-temperature steel plate is conveyed. A gap 9 is provided in consideration of the expansion of the gas.

また、押圧手段７は、例えば図１（ｃ）に示すような、ボルト等からなる固定手段７ａと、皿ばねや板ばね等からなるばね部材７ｂと、凸部を有した可動部材７ｃとから構成されており、内筒部材２の端部の外周側であるフランジ部５に設けた、座繰り部を有する貫通穴内に配置されている。これにより、ボルト等からなる固定手段７ａを締め付けると、ばね部材７ｂにより押された可動部材７ｃが外筒部材３の端面方向に移動し、可動部材７ｃの先端部がシート状部材８を介して外筒部材３の端面を押圧して、内筒部材２への外筒部材３の軸方向の固定を行なう。 The pressing means 7 includes a fixing means 7a made of a bolt or the like, a spring member 7b made of a disc spring or a leaf spring, and a movable member 7c having a convex portion as shown in FIG. It is comprised and is arrange | positioned in the through-hole which has the counterbore part provided in the flange part 5 which is the outer peripheral side of the edge part of the inner cylinder member 2. As shown in FIG. As a result, when the fixing means 7 a made of a bolt or the like is tightened, the movable member 7 c pushed by the spring member 7 b moves in the direction of the end surface of the outer cylinder member 3, and the distal end portion of the movable member 7 c passes through the sheet-like member 8. The end surface of the outer cylinder member 3 is pressed to fix the outer cylinder member 3 to the inner cylinder member 2 in the axial direction.

このように、本発明の搬送用ローラ１は、金属製の内筒部材２とセラミック製の外筒部材３とからなり、内筒部材２の端部の外周側に設けた複数の押圧手段７が、シート状部材８を介して外筒部材３の端面を押圧することにより、押圧手段７から付与される押圧力をシート状部材８の面全体に分散させて、広い範囲で外筒部材３の端面に伝達して外筒部材３を軸方向に固定しているので、外筒部材３の円周方向への空回りを防ぐことができる。 As described above, the conveying roller 1 of the present invention includes the metal inner cylinder member 2 and the ceramic outer cylinder member 3, and a plurality of pressing means 7 provided on the outer peripheral side of the end of the inner cylinder member 2. However, by pressing the end surface of the outer cylindrical member 3 via the sheet-like member 8, the pressing force applied from the pressing means 7 is dispersed over the entire surface of the sheet-like member 8, and the outer cylindrical member 3 is widened. Since the outer cylinder member 3 is fixed in the axial direction by transmitting to the end surface of the outer cylinder member, it is possible to prevent the outer cylinder member 3 from rotating freely in the circumferential direction.

このシート状部材８を配置していなければ、外筒部材３を軸方向に固定するために押圧手段７によって大きな押圧力を付与すると、接触する押圧手段７の可動部材７ｃの先端部と外筒部材３の端面とのいずれか、もしくは両方に変形，亀裂や破損が生じやすくなるおそれがある。また、外筒部材３の円周方向の空回りや、押圧手段７の可動部材７ｃの先端部や外筒部材３の端面に局部的に掛かる押圧力による変形，亀裂や破損等の不具合の発生を防ぐには、複数の押圧手段７の押圧力を均一に揃えることが望ましいが、このシート状部材８を用いれば、押圧手段７の可動部材７ｃの先端部よりも広い範囲において押圧力を発揮させることができるので、押圧手段７の可動部材７ｃの先端部や外筒部材３の端面に局部的に掛かる押圧力による変形，亀裂や破損等の不具合の発生を抑制し、押圧力を均一にするための調整の困難さを緩和することができる。 If this sheet-like member 8 is not disposed, when a large pressing force is applied by the pressing means 7 in order to fix the outer cylinder member 3 in the axial direction, the distal end portion of the movable member 7c of the pressing means 7 and the outer cylinder that come into contact with each other There is a possibility that deformation, cracking or breakage is likely to occur in either or both of the end faces of the member 3. In addition, the circumferential rotation of the outer cylinder member 3 and the occurrence of defects such as deformation, cracks and breakage due to the pressing force locally applied to the distal end portion of the movable member 7c and the end surface of the outer cylinder member 3 of the pressing means 7 In order to prevent this, it is desirable to make the pressing forces of the plurality of pressing means 7 uniform, but if this sheet-like member 8 is used, the pressing force is exerted in a wider range than the tip of the movable member 7c of the pressing means 7. Therefore, it is possible to suppress the occurrence of defects such as deformation, cracks and breakage due to the pressing force locally applied to the distal end portion of the movable member 7c of the pressing means 7 and the end surface of the outer cylinder member 3, and to make the pressing force uniform. Therefore, the difficulty of adjustment can be alleviated.

また、シート状部材８は外筒部材３の端面や内筒部材２の端部の外周部に機械的に強固に固定されているものではないので、搬送対象物や異物等が外筒部材３に引っかかったりすること等によって外筒部材３に異常な外力が加わって、そのまま回転させたのでは外筒部材３または内筒部材２が破損しかねない状態になったときには、シート状部材８と外筒部材３の端面との間で、あるいはシート状部材８と押圧手段７の稼動部材７ｃの先端部との間で、外筒部材３による過大な抵抗力に対して滑らせるようにもできるため、そのような異常状態に対して、従来の搬送用ローラのようにピンが破損するような問題を起こすことなく、外筒部材３または内筒部材２が破損することを防止することもできる。 Further, since the sheet-like member 8 is not mechanically firmly fixed to the end surface of the outer cylindrical member 3 or the outer peripheral portion of the end portion of the inner cylindrical member 2, a conveyance object, foreign matter, etc. When an abnormal external force is applied to the outer cylindrical member 3 by being caught on the outer cylindrical member 3 and the outer cylindrical member 3 or the inner cylindrical member 2 may be damaged if rotated as it is, the sheet-like member 8 and It can also be made to slide against the excessive resistance force by the outer cylinder member 3 between the end surface of the outer cylinder member 3, or between the sheet-like member 8 and the front-end | tip part of the operation member 7c of the press means 7. Therefore, it is possible to prevent the outer cylinder member 3 or the inner cylinder member 2 from being damaged without causing a problem that the pin is damaged as in the case of the conventional conveying roller in such an abnormal state. .

そして、シート状部材８は、その表面が押圧手段７の可動部材７ｃの先端の押圧面の面積よりも大きく、押圧面積が増加できる形状であればどのような形状でもよい。しかしながら、シート状部材８は、搬送用ローラ１の組み立て時に押圧手段７と外筒部材３との間に配置させる部材であることを考慮すると、その形状を内筒部材２のフランジ部５に沿ったリング状とするのがより好適である。 The sheet-like member 8 may have any shape as long as the surface thereof is larger than the area of the pressing surface at the tip of the movable member 7c of the pressing means 7 and the pressing area can be increased. However, considering that the sheet-like member 8 is a member disposed between the pressing means 7 and the outer cylindrical member 3 when the conveying roller 1 is assembled, the shape of the sheet-like member 8 extends along the flange portion 5 of the inner cylindrical member 2. It is more preferable to use a ring shape.

図２は、本発明の搬送用ローラにおけるシート状部材の実施の形態の一例を示す、（ａ）は正面図であり、（ｂ）は（ａ）におけるＢ−Ｂ’線での断面図である。 FIG. 2 shows an example of an embodiment of a sheet-like member in the conveying roller of the present invention, (a) is a front view, and (b) is a sectional view taken along line BB ′ in (a). is there.

シート状部材８は、リング状以外の形状では、内筒部材２のフランジ部５に設けられた押圧手段７の数や位置や間隔に合わせて外筒部材３の端面にシート状部材８を接着剤やテープ等で貼り付けなければならず、組み立て工程が煩雑となる。これに対し、シート状部材８が図２に示すようにリング状であれば、押圧手段７の数や位置や間隔にとらわれることなく、内筒部材２のフランジ部５に設けられた押圧手段７と外筒部材３との間に配置させることができる。また、シート状部材８の厚さに関しては、内筒部材２のフランジ部５と外筒部材３との間に設けられる隙間９よりも小さく、かつ押圧手段７の可動部材７ｃの可動範囲よりも小さくする必要があり、押圧手段７からの押圧力によって変形や破損がなく、外筒部材３の端面へ押圧力を伝達できるように、ある程度の剛性を有する厚さとする必要があり、0.5〜５ｍｍとするのが好ましい。 When the sheet-like member 8 has a shape other than the ring shape, the sheet-like member 8 is bonded to the end surface of the outer cylinder member 3 in accordance with the number, position, and interval of the pressing means 7 provided on the flange portion 5 of the inner cylinder member 2. It must be affixed with an agent, a tape, etc., and an assembly process becomes complicated. On the other hand, if the sheet-like member 8 is ring-shaped as shown in FIG. 2, the pressing means 7 provided on the flange portion 5 of the inner cylinder member 2 is not limited by the number, position, or interval of the pressing means 7. And the outer cylinder member 3. Further, the thickness of the sheet-like member 8 is smaller than the gap 9 provided between the flange portion 5 of the inner cylinder member 2 and the outer cylinder member 3, and is larger than the movable range of the movable member 7c of the pressing means 7. It is necessary to reduce the thickness, and it is necessary to make the thickness of a certain degree of rigidity so that the pressing force can be transmitted to the end surface of the outer cylindrical member 3 without being deformed or damaged by the pressing force from the pressing means 7. Is preferable.

さらに、シート状部材８の材質としては、金属，樹脂，セラミックス等様々な材質のものを適用可能であるが、押圧手段７の可動部材７ｃの先端部の押圧面から局部的な押圧力を受けても変形や破損等を生じることがなく、かつ受けた押圧力を外筒部材３の端面へ伝達できる剛性を有していなければならない。セラミックスを用いた場合には、剛性は有しているものの、厚みを厚くしなければ局部的な押圧力を受けて破損するおそれがある。樹脂を用いた場合には、押圧力を外筒部材３の端面へ伝達するための剛性が不足するため、より厚くしなければならない。そのため、0.5〜５ｍｍの厚みにおいてある程度の剛性を有しながら破損の可能性が低い、金属とすることが好ましい。より好ましくは、金属の中でも強度および硬度が高く、しかも高温で酸化による劣化の少ないステンレス鋼を用いるのがよい。 Further, as the material of the sheet-like member 8, various materials such as metal, resin, ceramics, etc. can be applied. However, the sheet-like member 8 receives a local pressing force from the pressing surface at the tip of the movable member 7c of the pressing means 7. However, it must be rigid so that it does not cause deformation or breakage, and the received pressing force can be transmitted to the end surface of the outer cylinder member 3. When ceramic is used, it has rigidity, but unless it is thickened, it may be damaged by receiving a local pressing force. When resin is used, the rigidity for transmitting the pressing force to the end surface of the outer cylinder member 3 is insufficient, so that it must be made thicker. Therefore, it is preferable to use a metal that has a certain degree of rigidity at a thickness of 0.5 to 5 mm and has a low possibility of breakage. More preferably, it is preferable to use stainless steel which has high strength and hardness among metals and which is hardly deteriorated by oxidation at a high temperature.

また、シート状部材８の表面は、押圧手段７の可動部材７ｃの先端部からの押圧力を外筒部材３の端面に伝達して外筒部材３の空回りをより確実に防止するために、表面の算術平均高さ（Ｒａ）が0.5〜50μｍであることが好ましい。これにより、シート状部材８と押圧手段７の可動部材７ｃの先端部および外筒部材３の端面との摩擦抵抗が増加して、それぞれの接触面で滑りを生じるおそれが少なくなり、空回りを防止することができる。これに対し、シート状部材８の表面の算術平均高さ（Ｒａ）が0.5μｍ未満の平滑性が良好なシート状部材８では、摩擦抵抗が低く、それぞれの接触面で滑って空回りを生じるおそれがある。また、50μｍを超える表面の算術平均高さ（Ｒａ）にしようとすると、摩擦抵抗が大きいものの、外筒部材３に異常が生じて過大な抵抗力が発生したときに、シート状部材８が適度に滑って外筒部材３あるいは内筒部材２の破損を防止することが困難となる傾向があり、またシート状部材８の加工コストが著しく高くなるために好ましくない。なお、押圧手段７の可動部材７ｃの先端部および外筒部材３の端面の表面粗さについても、シート状部材８と同様の表面の算術平均高さ（Ｒａ）の範囲とすれば、接触面での摩擦抵抗がより増加してそれぞれの接触面での滑りをさらに抑えて空回りを確実に防止することができ、内筒部材２が外筒部材３を強固に保持することができる。 Further, the surface of the sheet-like member 8 transmits the pressing force from the distal end portion of the movable member 7c of the pressing means 7 to the end surface of the outer cylinder member 3 to more reliably prevent the outer cylinder member 3 from idling. The arithmetic average height (Ra) of the surface is preferably 0.5 to 50 μm. As a result, the frictional resistance between the sheet-like member 8 and the distal end portion of the movable member 7c of the pressing means 7 and the end surface of the outer cylindrical member 3 is increased, and the possibility of causing slippage at each contact surface is reduced, thereby preventing idling. can do. On the other hand, in the sheet-like member 8 having a smoothness with an arithmetic average height (Ra) of less than 0.5 μm on the surface of the sheet-like member 8, the frictional resistance is low, and there is a risk of slipping on each contact surface to cause idle rotation. There is. In addition, when the arithmetic average height (Ra) of the surface exceeding 50 μm is attempted, the sheet-like member 8 is moderate when an excessive resistance is generated due to an abnormality in the outer cylindrical member 3 although the frictional resistance is large. Therefore, it is difficult to prevent the outer cylinder member 3 or the inner cylinder member 2 from being damaged, and the processing cost of the sheet-like member 8 is remarkably increased. In addition, if the surface roughness of the front-end | tip part of the movable member 7c of the press means 7 and the end surface of the outer cylinder member 3 is also made into the range of the arithmetic mean height (Ra) of the surface similar to the sheet-like member 8, a contact surface Further, the frictional resistance of the inner cylinder member can be further increased, and slippage at each contact surface can be further suppressed to prevent idling, and the inner cylinder member 2 can firmly hold the outer cylinder member 3.

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３は、本発明の搬送用ローラにおける外筒部材または内筒部材の実施の形態の一例を示す、（ａ）は外筒部材の正面図であり、（ｂ）は（ａ）におけるＣ−Ｃ’線での断面図であり、（ｃ）は内筒部材の正面図であり、（ｄ）は（ｃ）におけるＤ−Ｄ’線での断面図である。 FIG. 3 shows an example of an embodiment of the outer cylinder member or the inner cylinder member in the conveying roller of the present invention, (a) is a front view of the outer cylinder member, and (b) is a C- in (a). It is sectional drawing in C 'line, (c) is a front view of an inner cylinder member, (d) is sectional drawing in the DD' line in (c).

外筒部材３は、高温の鋼板や鉄鋼を始めとする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。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よい。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、各種金属との耐磨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 wire rod such as a high-temperature steel plate or steel, the outer tube member 3 is made of ceramics having excellent heat resistance and excellent wear resistance with the steel plate or wire rod. Specifically, ceramics mainly composed of alumina, silicon carbide, silicon nitride, and zirconia are preferably used. In particular, silicon nitride has high strength, a low coefficient of thermal expansion, and does not cause cracks or breakage when repeatedly transporting high-temperature steel plates, etc., and has excellent wear resistance with various metals. For this reason, if the outer cylinder member 3 is made of ceramics mainly composed of silicon nitride, the conveying roller 1 having durability superior to that of the related art can be obtained.

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、かつ加工しやすくして製造コスト低減を図るという点から、外筒部材３の形状は単純形状とすることが好ましく、図３（ｂ）に示すように、円筒の両端の内面に、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よい。 Thus, by using ceramic as the material, the shape of the outer cylinder member 3 is a simple shape in that stress is not concentrated, cracks are prevented and damage is prevented, and processing is facilitated to reduce manufacturing costs. As shown in FIG. 3 (b), the inner surface of both ends of the cylinder is provided with a stepped portion 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 good to do.

内筒部材２は、図３（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７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の内周には、後に押圧手段７の固定手段７ａ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の材質としては、とりたてて優れた耐磨耗性や耐熱性が要求される訳ではないので、一般的な炭素鋼やステンレス鋼等の金属を用いればよく、穴部22に嵌合させる回転軸４との熱膨張差による不具合が生じないように、回転軸４と同材質のものを使用するのがよい。より好適には、金属を組み合わせた熱膨張係数の値の低い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られて、外筒部材３の破損を防止することができる。 As shown in FIGS. 3 (c) and 3 (d), the inner cylinder member 2 has a cylindrical shape with a hole 22 for fitting to 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 7 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. An internal thread portion for later fastening with the fixing means 7 a of the pressing means 7 is provided on the inner periphery of the counterbore hole 23. Further, the material of the inner cylinder member 2 is not necessarily required to have excellent wear resistance or heat resistance, and therefore, a general metal such as carbon steel or stainless steel may be used. It is preferable to use the same material as the rotating shaft 4 so as not to cause a problem due to a difference in thermal expansion between the rotating shaft 4 and the rotating shaft 4 to be fitted. More preferably, if various alloys having a low coefficient of thermal expansion combined with metal are used, the difference in thermal expansion from the ceramic outer cylinder member 3 can be suppressed low, and the outer cylinder member 3 can be prevented from being damaged. Can do.

図４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または押圧手段を構成する固定手段，ばね部材，可動部材の実施の形態の一例を示す、（ａ）はリング状フランジ部材の正面図であり、（ｂ）は（ａ）におけるＥ−Ｅ’線での断面図であり、（ｃ）の（ｉ）〜（iii）は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Ｆ−Ｆ’線での断面図である。 FIG. 4 shows an example of an embodiment of a fixing means, a spring member, and a movable member constituting a ring-shaped flange member or a pressing means in the conveying roller of the present invention, (a) is a front view of the ring-shaped flange member. (B) is a cross-sectional view taken along line EE ′ in (a), and (i) to (iii) in (c) are front views of a fixing means, a spring member, and a movable member constituting the pressing means. It is sectional drawing in the FF 'line.

リング状フランジ部材６は、図４（ａ）に示すように、外観形状がリング状をしており、その内周面には、図４（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よい。また、外筒部材３を軸方向に強固に固定できるように、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と同等の外径として、できるだけ外筒部材３との大きな接触面積を得ることが好ましい。 As shown in FIG. 4A, the ring-shaped flange member 6 has a ring-like appearance, and the inner peripheral surface thereof has an end of the inner cylinder member 2 as shown in FIG. 4B. An internal thread portion 26 is provided to be fastened to an external thread portion 24 provided in the portion. The material of the ring-shaped flange member 6 is preferably made of the same material as that of the inner cylinder member 2 in consideration of the difference in thermal expansion. Further, the outer diameter of the ring-shaped flange member 6 is set to be equal to the outer diameter of the flange portion 5 of the inner cylinder member 2 so that the outer cylinder member 3 can be firmly fixed in the axial direction. It is preferable to obtain an area.

また、押圧手段７は、図４（ｃ）の（ｉ）に示す固定手段７ａ，（ii）に示すばね部材７ｂおよび（iii）に示す可動部材７ｃにより構成されている。固定手段７ａは、断面が凸形状であり、大径部の外周には内筒部材２の座繰り穴23の内周に設けられた雌ねじ部と締結して固定するための雄ねじ部27が設けられ、先端にばね部材押圧部28を有している。ばね部材７ｂは、座繰り穴23の軸方向に圧縮するばねであり、可動部材７ｃは、断面が凸形状であり、座繰り穴23に可動部材７ｃ，ばね部材７ｂを入れて、固定手段７ａを締結することにより、ばね部材押圧部28がばね部材７ｂの表面29と接触し、固定手段７ａを座繰り穴23へより深く締結させることで、ばね部材７ｂが座繰り穴23の軸方向と平行に圧縮されて可動部材７ｃを押圧することにより、シート状部材８を介して外筒部材３の端面を押圧する。押圧された可動部材７ｃは、その先端部30でもってシート状部材８を介して外筒部材３の端面を押圧するため、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。また、これら押圧手段７の材質としては、固定手段７ａは内筒部材２と同様の金属を用いて作製するのがよく、ばね部材７ｂは炭素鋼，ばね鋼（ＳＵＰ），ステンレス鋼等を用いるのがよい。また、可動部材７ｃは、金属，セラミックスのどちらでもよいが、衝撃に対する粘り強さや、材料の価格や加工の容易さによる低コスト化を考慮すると、炭素鋼やステンレス鋼等の一般的な金属を用いて作製するのがよい。 The pressing means 7 includes a fixing means 7a shown in (i) of FIG. 4C, a spring member 7b shown in (ii), and a movable member 7c shown in (iii). The fixing means 7a has a convex cross section, and a male screw portion 27 for fastening and fixing with a female screw portion provided on the inner periphery of the counter bore 23 of the inner cylinder member 2 is provided on the outer periphery of the large diameter portion. The spring member pressing portion 28 is provided at the tip. The spring member 7b is a spring that compresses in the axial direction of the counterbore hole 23, and the movable member 7c has a convex cross section. The movable member 7c and the spring member 7b are inserted into the counterbore hole 23 to fix the spring 7b. The spring member pressing portion 28 comes into contact with the surface 29 of the spring member 7b, and the fixing means 7a is tightened more deeply into the countersink hole 23, so that the spring member 7b is aligned with the axial direction of the countersink hole 23. The end surface of the outer cylinder member 3 is pressed via the sheet-like member 8 by being compressed in parallel and pressing the movable member 7c. Since the pressed movable member 7c presses the end surface of the outer cylindrical member 3 via the sheet-like member 8 with the tip portion 30, the outer cylindrical member 3 is fixed in the axial direction between the outer cylindrical member 3 and the ring-shaped flange member 6. Will be. As the material of the pressing means 7, the fixing means 7a is preferably made of the same metal as the inner cylinder member 2, and the spring member 7b is made of carbon steel, spring steel (SUP), stainless steel, or the like. It is good. Further, the movable member 7c may be either metal or ceramics, but in consideration of the tenacity against impact and the cost reduction due to the price of the material and the ease of processing, a general metal such as carbon steel or stainless steel is used. It is good to make.

さらに、押圧手段７は、内筒部材２のフランジ部５に複数配置されるのがよい。押圧手段７の設置が１ヶ所である場合には、シート状部材８を介しても、その１ヶ所に対応した局所的な外筒部材３の端面の一部を部分的に押圧するのみとなり、外筒部材３をその軸方向に強固に固定することが困難となる。また、１ヶ所の押圧手段７による固定では、搬送用ローラ１の使用時の振動等が押圧手段７の固定手段７ａの雄ねじ部27に集中して伝わり、ねじに緩みが生じることも考えられる。よって、押圧手段７は、内筒部材２のフランジ部５に対して、少なくとも２ヶ所以上の複数ヶ所に設置されるのがよい。 Furthermore, a plurality of pressing means 7 are preferably arranged on the flange portion 5 of the inner cylinder member 2. When the pressing means 7 is installed at one place, only a part of the local end surface of the outer cylindrical member 3 corresponding to the one place is partially pressed through the sheet-like member 8. It becomes difficult to firmly fix the outer cylinder member 3 in the axial direction. Further, in the fixing by one pressing means 7, it is also conceivable that vibration during use of the conveying roller 1 is concentrated on the male thread portion 27 of the fixing means 7a of the pressing means 7 and the screw is loosened. Therefore, the pressing means 7 is preferably installed at a plurality of at least two locations with respect to the flange portion 5 of the inner cylinder member 2.

さらに、押圧手段７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、左右対称あるいは等間隔となるように配置されるのがよい。これにより、シート状部材８を介して外筒部材３の端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確実で強固なものとすることができる。 Further, the pressing means 7 is preferably arranged in the flange portion 5 so as to be symmetrical or equidistant as shown in FIG. 1A around the hole portion 22 of the inner cylinder member 2. Thereby, a pressing force can be equally applied to the end surface of the outer cylinder member 3 through the sheet-like member 8, and the axial fixation of the outer cylinder member 3 can be made more reliable and stronger.

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、内側にそれぞれ内筒部材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、組み立てられた搬送用ローラ１において外筒部材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にも使用することができる。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同士が接触することがあるため、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同士の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同士の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 end portions of the outer cylindrical member 3, there are provided stepped portions 21 that can be fitted to the flange portion 5 and the ring-shaped flange member 6 of the inner cylindrical member 2, and these stepped portions 21 are respectively provided inside. It is preferable that the flange portion 5 of the inner cylinder member 2 and the ring-shaped flange member 6 be dimensioned. Thereby, the flange part 5 and the ring-shaped flange member 6 of the inner cylinder member 2 are accommodated in the step part 21 of the outer cylinder member 3 in the assembled conveyance roller 1. 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, it can be used not only for a wide steel plate but for conveyance of a narrow steel material or a wire. 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 may come into contact with each other, the conveyance rollers 1 cannot be arranged in parallel with the width of the outer cylinder member 3, and a gap is generated between the conveyance rollers 1. In such a configuration, a wire rod narrower than the gap between the conveying rollers 1 or a steel plate having a narrow width is not preferable because it may fall into the gap.

なお、内筒部材２と外筒部材３との間に均一な隙間９を設けたまま両者を固定する方法については、図３（ａ）の正面の方向およびその背面の方向から搬送用ローラ１を見たときに外筒部材３との隙間９が均一となるように嵌合させればよいが、より精度よく均一な隙間９を設けてこれを維持しようとすれば、外筒部材３とリング状フランジ部材６の接触面をテーパ面とする方法や段差を設ける方法を用いることが可能である。 In addition, about the method of fixing both with the uniform clearance gap 9 provided between the inner cylinder member 2 and the outer cylinder member 3, from the direction of the front of FIG. May be fitted so that the gap 9 between the outer cylinder member 3 and the outer cylinder member 3 is uniform. However, if the uniform gap 9 is provided with high accuracy and is maintained, It is possible to use a method in which the contact surface of the ring-shaped flange member 6 is a tapered surface or a method in which a step is provided.

このように、本発明の搬送用ローラ１は、金属製の内筒部材２とセラミック製の外筒部材３とからなり、内筒部材２の端部の外周側に設けた複数の押圧手段７が、シート状部材８を介して外筒部材３の端面を押圧することにより、従来の構造よりも外筒部材３の端面の押圧面積を増加させて軸方向の固定が緩まないため、外筒部材３が空回りすることを防止することができる。さらに、回転に対する外筒部材３の過大な抵抗力に対しては、シート状部材８を外筒部材３の端面または押圧手段７との間で適度に滑らせることができるので、外筒部材３あるいは内筒部材２の破損を防止することもできる。 As described above, the conveying roller 1 of the present invention includes the metal inner cylinder member 2 and the ceramic outer cylinder member 3, and a plurality of pressing means 7 provided on the outer peripheral side of the end of the inner cylinder member 2. However, by pressing the end surface of the outer cylinder member 3 through the sheet-like member 8, the pressing area of the end surface of the outer cylinder member 3 is increased as compared with the conventional structure, and the axial fixing is not loosened. It is possible to prevent the member 3 from idling. Furthermore, the sheet member 8 can be appropriately slid between the end surface of the outer cylinder member 3 or the pressing means 7 against the excessive resistance force of the outer cylinder member 3 against rotation. Or damage to the inner cylinder member 2 can also be prevented.

また、本発明の搬送用ローラ１は、シート状部材８が外筒部材３の端面に沿ったリング状であるときには、外筒部材３の端面とシート状部材８との接触面積をさらに増加させることができるとともに、内筒部材２のフランジ部５に設けられた押圧手段７と外筒部材３との間にシート状部材８を容易に安定して配置することができる。 Further, the conveying roller 1 of the present invention further increases the contact area between the end surface of the outer cylinder member 3 and the sheet-like member 8 when the sheet-like member 8 is in a ring shape along the end surface of the outer cylinder member 3. In addition, the sheet-like member 8 can be easily and stably disposed between the pressing means 7 provided on the flange portion 5 of the inner cylinder member 2 and the outer cylinder member 3.

さらに、本発明の搬送用ローラ１は、シート状部材８が金属からなるときには、押圧手段７でシート状部材８に強い押圧力を加えたとしてもシート状部材８が容易に破損することがなく、良好な外筒部材３への押圧力の付与を長期間にわたって維持することができる。 Furthermore, in the conveyance roller 1 of the present invention, when the sheet-like member 8 is made of metal, even if a strong pressing force is applied to the sheet-like member 8 by the pressing means 7, the sheet-like member 8 is not easily damaged. Further, it is possible to maintain a good pressing force applied to the outer cylinder member 3 over a long period of time.

また、本発明の搬送用ローラ１は、シート状部材８の表面の算術平均高さ（Ｒａ）が0.5〜50μｍであるときには、シート状部材８と外筒部材３の端面との接触部における摩擦力を増加させることができ、また過大の抵抗力に対しては適度に滑らせることもできるので、内筒部材２が外筒部材３を強固に保持することができ、回転に対する異常な状態が発生した際の外筒部材３あるいは内筒部材２の破損を防止することもできる。 In addition, when the arithmetic average height (Ra) of the surface of the sheet-like member 8 is 0.5 to 50 μm, the conveying roller 1 of the present invention has a friction at the contact portion between the sheet-like member 8 and the end surface of the outer cylindrical member 3. The force can be increased, and the inner cylinder member 2 can hold the outer cylinder member 3 firmly, and an abnormal state with respect to the rotation can be obtained because it can be slid appropriately against an excessive resistance force. It is also possible to prevent damage to the outer cylinder member 3 or the inner cylinder member 2 when it occurs.

このような構成の本発明の搬送用ローラ１は、シート状部材８を介して外筒部材３の端面を押圧して軸方向を固定していることによって外筒部材３が空回りすることがないので、図５に示すような鋼板52や線材の搬送ライン用の搬送用ローラ１として、長期間にわたって良好な搬送を実施することが可能である。 In the transport roller 1 of the present invention having such a configuration, the outer cylinder member 3 is not idled by pressing the end surface of the outer cylinder member 3 via the sheet-like member 8 and fixing the axial direction. Therefore, it is possible to carry out good transport over a long period of time as the transport roller 1 for the steel sheet 52 or the wire transport line as shown in FIG.

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５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, which is an example of an embodiment of the present invention, were manufactured, and a test for transporting a steel plate was performed on a steel plate transport line having a schematic configuration shown in FIG. Details are shown below.

＜外筒部材の製作＞
図３（ａ），（ｂ）に示す、セラミック製の外筒部材３の製作を実施した。まず、予め造粒された窒化珪素２次原料を用意し、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）を用いて円筒形状に成形した。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、段差部21を形成するために端面の内周に切削加工を施した。その後、焼成炉に入れて焼成し、焼成後にさらに研削加工を施して、外径Ｌが300ｍｍ，内径Ｍが250ｍｍ，幅Ｎが200ｍｍであり、段差部21の内径Ｏが280ｍｍ，段差部21の軸に平行な方向の深さＰが25ｍｍの窒化珪素製の外筒部材３を10個得た。さらに、シート状部材８と接触する外筒部材３の段差部21の表面に、算術平均高さ（Ｒａ）が５μｍとなるようにブラスト加工を施した。 <Manufacture of outer cylinder member>
A ceramic outer cylinder member 3 shown in FIGS. 3A and 3B was manufactured. First, a pre-granulated silicon nitride secondary material is prepared, and this is put into a rubber mold from which a cylindrical molded product can be obtained, and molded into a cylindrical shape using an isostatic press molding apparatus (rubber press apparatus). . Thereafter, the obtained silicon nitride molded body was taken out from the rubber mold, and in order to form the stepped portion 21, the inner periphery of the end face was cut. After that, it is fired in a firing furnace, and further subjected to grinding after firing. The outer diameter L is 300 mm, the inner diameter M is 250 mm, the width N is 200 mm, the inner diameter O of the step portion 21 is 280 mm, and the step portion 21 Ten silicon nitride outer cylinder members 3 having a depth P in the direction parallel to the axis of 25 mm were obtained. Further, the surface of the stepped portion 21 of the outer cylindrical member 3 in contact with the sheet-like member 8 was subjected to blasting so that the arithmetic average height (Ra) was 5 μm.

＜内筒部材の製作＞
図３（ｃ）および（ｄ）に示す内筒部材２の製作を実施した。まず、外径Ｑが280ｍｍのステンレス鋼棒を用意して、200ｍｍの長さで切り出した。この切り出したステンレス鋼棒の中心をフライス加工により内径Ｒ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Ｔ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を除く外周面を外径Ｕが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Ｔが25ｍｍのフランジ部５を形成した。次いで、フランジ部５に押圧手段７を配置するための貫通穴を４箇所設けるために、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。その後、円筒状のステンレス鋼の他方の端部に、Ｍ250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Ｍ18の雌ねじ部をねじ加工により形成して、内筒部材２を10個得た。 <Production of inner cylinder member>
The inner cylinder member 2 shown in FIGS. 3C and 3D was manufactured. First, a stainless steel rod having an outer diameter Q of 280 mm was prepared and cut out to a length of 200 mm. The center of the cut stainless steel rod was drawn out by milling so that the inner diameter R was 100 mm, and was formed into a cylindrical shape. Thereafter, in order to form a flange portion 5 having a wall thickness T of 25 mm on one side of the cylindrical stainless steel, the outer peripheral surface excluding the flange portion 5 of the cylindrical stainless steel is processed with a lathe so that the outer diameter U is 250 mm. Then, the flange portion 5 having a wall thickness T of 25 mm was formed on one of the cylindrical stainless steels. Next, in order to provide four through holes for disposing the pressing means 7 in the flange portion 5, a hole drilling with an inner diameter of 10 mm is performed with a drilling machine, and the further processed hole has an inner diameter of 14 mm and a depth of 13 mm. Two countersink portions having an inner diameter of 18 mm and a depth of 10 mm were formed to form a countersink hole 23 having a two-step countersink portion. Thereafter, an M250 male threaded portion 24 is formed on the other end of the cylindrical stainless steel by threading, and an M18 female threaded portion is formed on the inner diameter of the outermost countersink portion of the countersink hole 23 by threading. Thus, ten inner cylinder members 2 were obtained.

＜リング状フランジ部材の製作＞
図４（ａ）および（ｂ）に示すリング状フランジ部材６として、外径Ｖ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棒の中心部を内径Ｗ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Ｍ250の雌ねじ部26を形成して、リング状フランジ部材６を10個得た。 <Production of ring-shaped flange member>
As the ring-shaped flange member 6 shown in FIGS. 4 (a) and 4 (b), a stainless steel rod having an outer diameter V of 280 mm is cut out to a length of 20 mm, and the center portion of the cut stainless steel rod has an inner diameter W of 245 mm. The M250 female threaded portion 26 that can be fastened with the male threaded portion 24 formed at the end of the inner cylinder member 2 was formed on the inner diameter of the inner cylindrical member 2 to obtain ten ring-shaped flange members 6.

＜押圧手段の製作＞
図４（ｃ）の（ｉ）に示す押圧手段７の固定手段７ａ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棒の一方に外径が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Ｍ18の雄ねじ部27を旋盤加工およびねじ加工により形成して、固定手段７ａを40個得た。 <Production of pressing means>
As a fixing means 7a of the pressing means 7 shown in (i) of FIG. 4 (c), a stainless steel rod having an outer diameter of 20 mm is cut out to a length of 15 mm, and one of the cut stainless steel bars has an outer diameter of 13.5 mm. After forming the spring member pressing portion 28 having a length of 5 mm, an M18 male screw portion 27 is formed on the outer diameter portion excluding the spring member pressing portion 28 by lathe processing and screw processing to obtain 40 fixing means 7a. It was.

次に、図４（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40個用意した。また、図４（ｃ）の（iii）に示す押圧手段７の可動部材７ｃ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を施して可動部材の先端部30を形成し、先端部30の表面に粗い砥粒を用いて研磨加工を施して、表面粗さを５μｍの算術平均高さ（Ｒａ）とした可動部材７ｃを40個得た。 Next, as a spring member 8b of the pressing means 8 shown in (ii) of FIG. 4 (c), a commercially available disc spring (JIS B2706-2001 called 7 outer diameter is 14mm, thickness is 0.5mm, height is 0.9mm. 40) were prepared. Further, as the movable member 7c of the pressing means 7 shown in (iii) of FIG. 4 (c), a stainless steel rod having an outer diameter of 13.5 mm is cut out to a length of 10 mm, and the outer diameter is 9.5 mm and the length is increased. The tip part 30 of the movable member is formed by a lathe so as to be 5 mm, and the surface of the tip part 30 is polished using coarse abrasive grains, and the surface roughness is an arithmetic average height of 5 μm ( 40 movable members 7c designated Ra) were obtained.

＜シート状部材の製作＞
図２に示すシート状部材８として、内筒部材２と同材質のステンレス鋼板から、外径Ｊが278ｍｍ，内径Ｋが250ｍｍ，厚みが１ｍｍのリング状のシート状部材８を10個切り出した。なお、内径Ｋについては、既に製造した内筒部材２に嵌合可能な公差をもって加工を実施した。次に、シート状部材８の両側の表面に粗い砥粒を用いて研磨加工を施し、算術平均高さ（Ｒａ）を５μｍとした。 <Manufacture of sheet-like members>
As the sheet-like member 8 shown in FIG. 2, ten ring-like sheet-like members 8 having an outer diameter J of 278 mm, an inner diameter K of 250 mm, and a thickness of 1 mm were cut out from a stainless steel plate made of the same material as the inner cylinder member 2. In addition, about the internal diameter K, it processed with the tolerance which can be fitted in the already manufactured inner cylinder member 2. FIG. Next, it grind | polished using the rough abrasive grain on the surface of the both sides of the sheet-like member 8, and arithmetic mean height (Ra) was 5 micrometers.

＜組み立て工程＞
次に、製作した部材の組み立てを行なった。まず、内筒部材２にシート状部材８および外筒部材３を嵌合させた。 <Assembly process>
Next, the manufactured member was assembled. First, the sheet-like member 8 and the outer cylinder member 3 were fitted to the inner cylinder member 2.

ここで、ステンレス鋼製の内筒部材２の外径Ｕと窒化珪素製の外筒部材３の内径Ｍとはともに250ｍｍであったが、両部材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、両部材間に径方向で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Ｕを249.25〜249.3ｍｍとし、外筒部材３の内径Ｍを250〜250.05ｍｍとして、この範囲内でそれぞれの部材を製作し、内筒部材２の外周と外筒部材３の内周との間に常温で予め最大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との接触部についても寸法の範囲を検討し、フランジ部５の外周と段差部21の内周との間に最大0.8ｍｍの隙間９を設けられるようにした。 Here, both the outer diameter U of the inner cylindrical member 2 made of stainless steel and the inner diameter M of the outer cylindrical member 3 made of silicon nitride were 250 mm. From the difference in thermal conductivity and thermal expansion coefficient between the two members, The boundary between both members is 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 is generated between both members in the radial direction. Therefore, the outer diameter U of the inner cylinder member 2 is set to 249.25 to 249.3 mm in advance, and the inner diameter M of the outer cylinder member 3 is set to 250 to 250.05 mm. A gap 9 having a maximum length of 0.8 mm was formed between the inner periphery of the outer cylindrical member 3 at room temperature in advance. Similarly, the range of dimensions 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 is also examined, and the maximum is between the outer periphery of the flange portion 5 and the inner periphery of the step portion 21. A gap 9 of 0.8 mm can be provided.

次に、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、４箇所の内筒部材２の座繰り穴23に押圧手段７となる可動部材７ｃを挿入して取り付け、次いで、ばね部材７ｂを挿入した後、固定手段７ａの雄ねじ部27を座繰り穴23の内周部に設けられた雌ねじ部と締結させた。これにより、可動部材７ｃの先端部30が、図１（ｃ）に示すように、シート状部材８を介して外筒部材３の端面である段差部21の底面に接触した状態となり、フランジ部５の外周と段差部21の内周との間に0.8ｍｍの隙間９が維持される構造となっている本発明の搬送用ローラ１を10個組み立てた。 Next, the female thread portion 26 of the ring-shaped flange member 6 was fastened to the male thread portion 24 provided at the end of the inner cylinder member 2. Then, the movable member 7c to be the pressing means 7 is inserted and attached to the countersink holes 23 of the four inner cylinder members 2, and then the spring member 7b is inserted, and then the male screw portion 27 of the fixing means 7a is inserted into the countersink hole. It was fastened with a female thread portion provided on the inner peripheral portion of 23. As a result, the distal end portion 30 of the movable member 7c comes into contact with the bottom surface of the stepped portion 21 which is the end surface of the outer cylindrical member 3 via the sheet-like member 8 as shown in FIG. Ten transport rollers 1 of the present invention having a structure in which a gap 9 of 0.8 mm is maintained between the outer periphery of 5 and the inner periphery of the stepped portion 21 were assembled.

＜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52を搬送するラインの回転軸４に取り付け、実際に鋼板52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ピンによって固定した搬送用ローラ51を、別ラインに同位置となるようにして回転軸53に取り付けた。試験は、長さが10ｍの鋼板52を１日８時間搬送することを１週間繰り返し、試験後に搬送用ローラ１，51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 52 having a temperature of around 1000 ° C., and a test for actually conveying the steel plate 52 was performed. In order to compare the test results with the transfer roller 1 of the present invention, the transfer roller 51 in which a conventional silicon nitride member and a metal member are fixed by pins is placed on a separate line at the same position so that the rotation shaft 53 Attached to. In the test, a 10 m long steel plate 52 was repeatedly transported for 8 hours a day for one week, and after the test, the transport rollers 1 and 51 were observed for damage and the like. The effectiveness was confirmed.

＜試験結果＞
搬送試験の結果、従来の搬送用ローラ51は、10個中全て窒化珪素部材が空回りして、搬送する鋼板52の表面に傷や凹凸ができるという不具合が発生した。 <Test results>
As a result of the conveyance test, the conventional conveyance roller 51 has a problem that all of the ten silicon nitride members are idle, and the surface of the conveyed steel plate 52 is scratched or uneven.

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外筒部材３の空回りがなく、良好な表面のまま鋼板52を搬送することができた。また、熱膨張差の大きな金属製の内筒部材２とセラミック製の外筒部材３との組み合わせであっても、本発明の搬送用ローラ１の特徴的な構成である、金属製の内筒部材２とセラミック製の外筒部材３とからなり、内筒部材２の端部の外周側に設けた複数の押圧手段７が、シート状部材８を介して外筒部材３の端面を押圧して内筒部材２が外筒部材３を保持していることにより、外筒部材３について亀裂や破損等の発生がなく、良好に鋼板52の搬送が実施でき、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 to this, the conveying roller 1 of the present invention was able to convey the steel plate 52 with a good surface without the idle rotation of the outer cylindrical member 3 even during long-time conveyance. Moreover, even if it is the combination of the metal inner cylinder member 2 with a large thermal expansion difference, and the ceramic outer cylinder member 3, it is a metal inner cylinder which is the characteristic structure of the conveyance roller 1 of this invention. A plurality of pressing means 7 including a member 2 and a ceramic outer cylinder member 3 provided on the outer peripheral side of the end of the inner cylinder member 2 press the end surface of the outer cylinder member 3 via the sheet-like member 8. Since the inner cylindrical member 2 holds the outer cylindrical member 3, the outer cylindrical member 3 is free from cracks and breakage, and can be transported well, and can be used well over a long period of time. It was a result that could be confirmed.

本発明の搬送用ローラの実施の形態の一例を示す、（ａ）は正面図であり、（ｂ）は（ａ）における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。An example of an embodiment of a conveyance roller of the present invention is shown, (a) is a front view, (b) is a sectional view taken along line AA ′ in (a), and (c) is (b) FIG. 本発明の搬送用ローラにおけるシート状部材８の実施の形態の一例を示す、（ａ）は正面図であり、（ｂ）は（ａ）におけるＢ−Ｂ’線での断面図である。An example of embodiment of the sheet-like member 8 in the conveyance roller of this invention is shown, (a) is a front view, (b) is sectional drawing in the B-B 'line in (a). 本発明の搬送用ローラにおける外筒部材または内筒部材の実施の形態の一例を示す、（ａ）は外筒部材の正面図であり、（ｂ）は（ａ）におけるＣ−Ｃ’線での断面図であり、（ｃ）は内筒部材の正面図であり、（ｄ）は（ｃ）におけるＤ−Ｄ’線での断面図である。An example of embodiment of the outer cylinder member in the conveyance roller of this invention or an inner cylinder member is shown, (a) is a front view of an outer cylinder member, (b) is CC 'line in (a). (C) is a front view of an inner cylinder member, (d) is sectional drawing in the DD 'line in (c). 本発明の搬送用ローラにおけるリング状フランジ部材または押圧手段を構成する固定手段，ばね部材，可動部材の実施の形態の一例を示す、（ａ）はリング状フランジ部材の正面図であり、（ｂ）は（ａ）におけるＥ−Ｅ’線での断面図であり、（ｃ）の（ｉ）〜（iii）は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Ｆ−Ｆ’線での断面図である。An example of embodiment of the fixing means, the spring member, and the movable member constituting the ring-shaped flange member or the pressing means in the conveying roller of the present invention is shown, (a) is a front view of the ring-shaped flange member, (b ) Is a cross-sectional view taken along line EE ′ in (a), and (i) to (iii) in (c) are front views and FF of a fixing means, a spring member, and a movable member constituting the pressing means. It is sectional drawing in a line. 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搬送の様子を示す、運搬ラインの概略図である。It is the schematic of a conveyance line which shows the mode of conveyance to the following processes, such as a steel plate and a steel wire, in the hot rolling line where the roller for conveyance of the past and the present invention is used.

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：押圧手段
７ａ：固定手段
７ｂ：ばね部材
７ｃ：可動部材
８：シート状部材
９：隙間 1: Conveying roller 2: Inner cylinder member 3: Outer cylinder member 4: Rotating shaft 5: Flange portion 6: Ring-shaped flange member 7: Pressing means 7a: Fixing means 7b: Spring member 7c: Movable member 8: Sheet-like member 9: Clearance

Claims

A plurality of pressing means provided on the outer peripheral side of the end portion of the inner cylinder member press the end surface of the outer cylinder member via the sheet-like member, which includes a metal inner cylinder member and a ceramic outer cylinder member. By carrying out, the said inner cylinder member is holding the outer cylinder member, The roller for conveyance characterized by the above-mentioned.

The conveyance roller according to claim 1, wherein the sheet-like member has a ring shape along an end surface of the outer cylinder member.

The conveyance roller according to claim 1, wherein the sheet-like member is made of metal.

The arithmetic roller height (Ra) of the surface of the said sheet-like member is 0.5-50 micrometers, The roller for conveyance in any one of Claims 1-3 characterized by the above-mentioned.