JP5537799B2 - Roller bearing structure - Google Patents

Roller bearing structure Download PDF

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JP5537799B2
JP5537799B2 JP2008298255A JP2008298255A JP5537799B2 JP 5537799 B2 JP5537799 B2 JP 5537799B2 JP 2008298255 A JP2008298255 A JP 2008298255A JP 2008298255 A JP2008298255 A JP 2008298255A JP 5537799 B2 JP5537799 B2 JP 5537799B2
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groove
peripheral surface
axial direction
ring member
ring
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JP2010121765A (en
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雅彦 竹原
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NTN Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • F16C13/022—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Sealing Of Bearings (AREA)

Description

本発明は、薄板製造設備等に使用されるテンションレベラーにおいて、テンションレベラーのワークロール、中間ロール、バックアップロール等の外筒を回転自在に支持する軸受構造、および回転軸の軸受構造に関する。   The present invention relates to a bearing structure that rotatably supports outer cylinders such as a work roll, an intermediate roll, and a backup roll of a tension leveler, and a bearing structure of a rotating shaft in a tension leveler used in a thin plate manufacturing facility or the like.

帯状製品の薄板に加工する工程において、ワークロール、中間ロール、バックアップロール等の外筒は、大量の冷却水および洗浄液といった水に晒される。このため、外筒を回転自在に支持する軸受にも、水が侵入し、軸受の潤滑不良および錆が発生する懸念があった。かかるロールの軸受内部への洗浄液等の侵入を防止する技術としては従来、例えば、特開２００６−２５０１９８号公報（特許文献１）に記載のごとき技術が知られている。特許文献１に記載のロール支持装置は、外筒の軸方向端部における内周面を、端部開口へ向かうほど内径が大きくなるテーパ孔に形成し、固定軸の外周に設けられて外筒のテーパ孔と対面するリング状部材の外周面を、外筒の端部開口へ向かうほど外径が大きくなるテーパ状に形成し、かかる外筒の端部と、リング状部材との環状隙間を、微小な隙間幅で部分円錐筒状にするというものである。
特開２００６−２５０１９８号公報 In the process of processing into a strip-shaped product, outer cylinders such as work rolls, intermediate rolls, and backup rolls are exposed to water such as a large amount of cooling water and cleaning liquid. For this reason, there is a concern that water may also enter the bearing that rotatably supports the outer cylinder, resulting in poor lubrication and rust of the bearing. As a technique for preventing the intrusion of cleaning liquid or the like into the inside of the bearing of such a roll, a technique as described in, for example, Japanese Patent Application Laid-Open No. 2006-250198 (Patent Document 1) is known. In the roll support device described in Patent Document 1, the inner peripheral surface at the axial end portion of the outer cylinder is formed into a tapered hole whose inner diameter increases toward the end opening, and is provided on the outer periphery of the fixed shaft. The outer peripheral surface of the ring-shaped member facing the tapered hole of the outer cylinder is formed in a taper shape with an outer diameter increasing toward the end opening of the outer cylinder, and an annular gap between the end of the outer cylinder and the ring-shaped member is formed. The partial conical cylinder shape is formed with a small gap width.
JP 2006-250198 A

しかし、上記従来のようなロール支持装置にあっては、以下に説明するような問題を生ずる。つまり、微小な隙間がリング状部材の軸線方向内側端から外側端まで延在することから、リング状部材の軸線方向内方に一旦、水が侵入すると、侵入した水をリング状部材の軸線方向外方へ排出することが困難である。   However, the above-described conventional roll support apparatus causes problems as described below. That is, since a minute gap extends from the inner end to the outer end in the axial direction of the ring-shaped member, once water enters the axial direction inward of the ring-shaped member, the water that has entered the axial direction of the ring-shaped member It is difficult to discharge outward.

本発明は、上述の実情に鑑み、外筒を回転自在に支持する軸受を水の侵入から保護するべく、外筒の端部から水が容易に侵入することができず、たとえ侵入した場合であっても、侵入した水を軸線方向外方へ容易に排出することができる軸受構造を提供することを目的とする。   In view of the above-described circumstances, the present invention can prevent water from easily entering from the end of the outer cylinder in order to protect the bearing that rotatably supports the outer cylinder from water intrusion. Even if it exists, it aims at providing the bearing structure which can discharge | emit the water which penetrate | invaded easily to the axial direction outward.

この目的のため本発明によるロールの軸受構造は、外筒および該外筒の軸線方向端部に固定されたリング部材を有する外側回転部材と、外側回転部材に挿通された内側固定部材と、外筒の内周面と内側固定部材の外周面との間に設けられて外側回転部材を回転自在に支持する軸受とを備え、外側回転部材のうちリング部材よりも軸線方向外側に位置する軸線方向外側部分はリング部材よりも大径であり、内側固定部材のうちリング部材よりも軸線方向外側に位置する軸線方向外側部分はリング部材よりも小径であり、リング部材は、軸線方向内方に向く環状面および軸線方向外側端面を有し、当該リング部材の内周面には軸受よりも軸線方向外方の位置にあってリング部材の環状面および軸線方向外側端面と接続する溝が形成され、溝は少なくとも一部において外筒の正回転方向に対し鋭角となるよう斜め方向に延びる。 For this purpose, the roll bearing structure according to the present invention comprises an outer rotating member having an outer cylinder and a ring member fixed to the axial end of the outer cylinder, an inner fixing member inserted through the outer rotating member, An axial direction which is provided between the inner peripheral surface of the cylinder and the outer peripheral surface of the inner fixing member and rotatably supports the outer rotating member, and is located on the outer side of the ring member in the axial direction of the outer rotating member. The outer portion has a larger diameter than the ring member, and the axially outer portion of the inner fixing member positioned axially outside the ring member has a smaller diameter than the ring member, and the ring member faces inward in the axial direction. A groove having an annular surface and an axially outer end surface, and a groove connecting to the annular surface and the axially outer end surface of the ring member at a position outside the bearing in the axial direction on the inner peripheral surface of the ring member; There are few grooves Extending in an oblique direction such that an acute angle with respect to the forward rotational direction of the outer cylinder is also in some as.

かかる本発明によれば、外側回転部材の内周面には軸受よりも軸線方向外方の位置にあって外側回転部材の軸線方向外側端面と接続する溝が形成され、溝は少なくとも一部において外側回転部材の正回転方向に対し鋭角となるよう斜め方向に延びることから、外側回転部材の正回転時に軸線方向外方から冷却水や洗浄水といった異物が飛来しても、異物は外側回転部材の軸線方向外側端面でせき止められ、溝に流入することができない。しかも、万一異物が、溝や、外側回転部材の内周面上に侵入しても、溝が異物を軸線方向外側へ付勢して異物を速やかに排出することができる。したがって、異物が溝を通過して軸線方向内方へ侵入することを防止できる。なお、溝は１箇所または複数箇所に形成され、１本または複数本形成される。   According to the present invention, the inner circumferential surface of the outer rotating member is formed with a groove that is located axially outward from the bearing and connected to the outer end surface of the outer rotating member in the axial direction, and the groove is at least partially. Since the outer rotating member extends in an oblique direction so as to make an acute angle with respect to the positive rotation direction of the outer rotating member, even if foreign matters such as cooling water and cleaning water come from the outside in the axial direction during the normal rotation of the outer rotating member, It is blocked by the outer end surface in the axial direction, and cannot flow into the groove. In addition, even if a foreign object enters the groove or the inner peripheral surface of the outer rotating member, the groove can urge the foreign object outward in the axial direction and quickly discharge the foreign object. Therefore, it is possible to prevent foreign matter from entering the axial direction inward through the groove. In addition, a groove | channel is formed in one place or multiple places, and one or more are formed.

本発明は一実施形態に限定されるものではないが、溝は、外側回転部材の回転軸を中心として螺旋状に延びてよい。かかる実施形態によれば、溝が螺旋形状に延びることから、外側回転部材内周面を雌ねじと同様に加工すればよく、溝の加工が容易になる。   Although the present invention is not limited to one embodiment, the groove may extend spirally about the rotation axis of the outer rotating member. According to this embodiment, since the groove extends in a spiral shape, the inner peripheral surface of the outer rotating member may be processed in the same manner as the female screw, and the processing of the groove becomes easy.

本発明は一実施形態に限定されるものではないが、溝は、外側回転部材の軸線方向外側端面よりも軸線方向内方の位置で折れて延びてもよい。これにより、溝に沿って侵入する異物が溝の折れ箇所よりも軸線方向内方へ侵入することを防止することができる。   Although this invention is not limited to one Embodiment, A groove | channel may bend and extend in the position of the axial direction inner side rather than the axial direction outer side end surface of an outer side rotation member. Thereby, it can prevent that the foreign material which penetrate | invades along a groove | channel invades in an axial direction inside rather than the broken part of a groove | channel.

本発明の溝は溝深さが一定になるよう形成されてもよいが、好ましくは、溝深さが軸線方向外側へ向かうにつれて大きくなるよう形成される。かかる実施形態によれば、溝深さが軸線方向外側へ向かうにつれて大きくなるよう形成されることから、回転中心から溝底までの距離が軸線方向外側に向かうにつれて大きくなる。これにより、軸線方向外側に向かうにつれて大きな遠心力が溝に作用して、溝内に存在する異物を効率よく排出することができる。   The groove of the present invention may be formed so that the groove depth is constant, but is preferably formed so that the groove depth increases toward the outside in the axial direction. According to this embodiment, since the groove depth is formed to increase toward the outer side in the axial direction, the distance from the rotation center to the groove bottom increases toward the outer side in the axial direction. Thereby, a big centrifugal force acts on a groove | channel as it goes to an axial direction outer side, and the foreign material which exists in a groove | channel can be discharged | emitted efficiently.

本発明は一実施形態に限定されるものではないが、リング部材は、所定の第１内径を有する第１領域と、第１領域よりも軸線方向内側に位置し第１内径よりも内径が大きい第２内径を有する第２領域とを有し、溝は、第１領域の内周面に形成されてもよい。かかる実施形態によれば、溝がリング部材の第１領域の内周面に形成されることから、リング部材内周面と内側固定部材との隙間に存在する異物を軸線方向外方へ排出することが可能になる。   Although the present invention is not limited to one embodiment, the ring member has a first region having a predetermined first inner diameter, an inner side in the axial direction of the first region, and a larger inner diameter than the first inner diameter. A second region having a second inner diameter, and the groove may be formed on an inner peripheral surface of the first region. According to this embodiment, since the groove is formed on the inner peripheral surface of the first region of the ring member, foreign matter present in the gap between the inner peripheral surface of the ring member and the inner fixing member is discharged outward in the axial direction. It becomes possible.

ここで溝は、リング部材の第１領域の軸線方向内方端から離れて形成されてもよい。かかる実施形態によれば、溝が第１領域の軸線方向内方端と接続しないことから、万一異物が溝に侵入しても、異物が溝を伝って内方端よりも軸線方向内方にさらに侵入することを防止することができる。   Here, the groove may be formed away from the axially inner end of the first region of the ring member. According to this embodiment, since the groove does not connect to the axially inner end of the first region, even if foreign matter enters the groove, the foreign matter travels along the groove and is axially inward from the inner end. Further intrusion can be prevented.

あるいは、溝は、リング部材の軸線方向内方端から軸線方向外方端まで形成される。かかる実施形態によれば、溝は、リング部材の軸線方向内方端と接続することから、万一異物がリング部材よりも軸線方向内方に侵入した場合であっても、かかる異物を軸線方向外方へ排出することが可能になる。   Alternatively, the groove is formed from the axially inner end of the ring member to the axially outer end. According to such an embodiment, since the groove is connected to the axially inner end of the ring member, even if the foreign matter enters the axially inward direction of the ring member, the foreign matter is removed in the axial direction. It becomes possible to discharge outward.

好ましくは、内側固定部材は、軸受の内輪の内周面に固定された固定軸と、リング部材に対面する位置で固定軸に固定された環状のカラーとを有し、カラーは、第２領域の内周面に対面する位置で径方向外方に向かって突出したフランジ部を備える。かかる実施形態によれば、フランジ部を備えることから、万一異物がリング部材よりも軸線方向内方へ侵入しても、かかる異物はフランジ部でせき止められ、軸受に異物が直接到達することを防止することができる。   Preferably, the inner fixing member has a fixing shaft fixed to the inner peripheral surface of the inner ring of the bearing, and an annular collar fixed to the fixing shaft at a position facing the ring member, and the collar has the second region. A flange portion protruding outward in the radial direction at a position facing the inner peripheral surface. According to such an embodiment, since the flange portion is provided, even if foreign matter enters the axial direction inward from the ring member, the foreign matter is blocked by the flange portion, and the foreign matter reaches the bearing directly. Can be prevented.

本発明に係る技術的思想は、外筒などの外側部材が回転する場合のみならず、軸などの内側部材が回転する一般軸受（ボールベアリング、テーパーベアリング、ローラーベアリング等）における、外部からの異物侵入を防止する場合にも適用可能である。例えば内側回転部材の軸受構造は、外側固定部材と、外側固定部材に挿通された内側回転部材と、外側固定部材の軸線方向端よりも軸線方向内方の位置で、外側固定部材の内周面および内側回転部材の外周面との間に設けられて内側回転部材を回転自在に支持する軸受とを備え、内側回転部材は、軸受の内輪の内周面に固定された内筒または軸と、該内筒または軸に固定されて外側固定部材の軸線方向端よりも軸線方向内側および外側にまたがって延びるリング部材とを有し、リング部材は軸線方向内方に向く環状面を有し、当該リング部材の外周面には外側固定部材の軸線方向端よりも軸線方向内側および外側にまたがって延びて環状面と接続する溝が形成され、溝は少なくとも一部において内側回転部材の正回転方向に対し鋭角となるよう斜め方向に延びる。またリング部材は軸線方向外側端面をさらに有し、溝は軸線方向外側端面と接続してもよい。 The technical idea according to the present invention is that not only when an outer member such as an outer cylinder rotates but also a foreign matter from a general bearing (ball bearing, taper bearing, roller bearing, etc.) where an inner member such as a shaft rotates. It can also be applied to prevent intrusion. For example, the bearing structure of the inner rotating member includes an outer fixing member, an inner rotating member inserted through the outer fixing member, and an inner peripheral surface of the outer fixing member at a position axially inward from the axial end of the outer fixing member. And a bearing provided between the outer peripheral surface of the inner rotating member and rotatably supporting the inner rotating member, and the inner rotating member includes an inner cylinder or a shaft fixed to the inner peripheral surface of the inner ring of the bearing, A ring member fixed to the inner cylinder or the shaft and extending across the axially inner side and the outer side of the axial direction end of the outer fixing member, the ring member having an annular surface facing inward in the axial direction, A groove is formed on the outer peripheral surface of the ring member so as to extend inward and outward in the axial direction from the axial end of the outer fixing member and connect to the annular surface, and the groove is at least partially in the positive rotation direction of the inner rotating member. It ’s an acute angle. Extending in an oblique direction. The ring member may further include an axially outer end surface, and the groove may be connected to the axially outer end surface.

かかる内側回転部材の軸受構造によれば、内側回転部材の外周面には外側固定部材の軸線方向端よりも軸線方向内側および外側にまたがって延びる溝が形成され、溝は少なくとも一部において内側回転部材の正回転方向に対し鋭角となるよう斜め方向に延びることから、内側回転部材の正回転時に軸線方向外方から冷却水や洗浄水といった異物が飛来しても、異物は外側固定部材の軸線方向端でせき止められ、溝に流入することができない。しかも、万一異物が、溝や、外側固定部材と内側回転部材との環状隙間に侵入しても、溝が異物を軸線方向外側へ付勢して異物を速やかに排出することができる。したがって、異物が溝を通過して軸線方向内方へ侵入することを防止できる。なお、内側回転部材についても、上述した外側回転部材に形成された溝にかかる実施形態と同じように、すべて適用可能である。 According to such a bearing structure of the inner rotating member, a groove is formed on the outer peripheral surface of the inner rotating member so as to extend inward and outward in the axial direction from the axial end of the outer fixing member. Since it extends in an oblique direction so as to be at an acute angle with respect to the normal rotation direction of the member, even if foreign matter such as cooling water or washing water comes from the outside in the axial direction at the time of forward rotation of the inner rotation member, the foreign matter will remain on the axis of the outer fixing member. It is blocked at the direction end and cannot flow into the groove. And even if a foreign material should penetrate | invade into the groove | channel or the annular clearance of an outer side fixing member and an inner side rotation member, a groove | channel can urge a foreign material to an axial direction outer side, and can discharge | emit a foreign material rapidly. Therefore, it is possible to prevent foreign matter from entering the axial direction inward through the groove. Note that the inner rotating member can be applied in all the same manner as in the above-described embodiment of the groove formed in the outer rotating member.

内側回転部材の軸受構造の溝は、内側回転部材の回転軸を中心として螺旋状に延びてもよい。かかる実施形態によれば、溝が螺旋形状に延びることから、外側回転部材内周面を雌ねじと同様に加工すればよく、溝の加工が容易になる。 The groove of the bearing structure of the inner rotating member may extend spirally around the rotation axis of the inner rotating member. According to this embodiment, since the groove extends in a spiral shape, the inner peripheral surface of the outer rotating member may be processed in the same manner as the female screw, and the processing of the groove becomes easy.

内側回転部材の軸受構造の溝は、外側固定部材の軸線方向端よりも軸線方向内方の位置で折れて延びてもよい。これにより、溝に沿って侵入する異物が溝の折れ箇所よりも軸線方向内方へ侵入することを防止することができる。 The groove of the bearing structure of the inner rotating member may be bent and extended at a position on the inner side in the axial direction from the axial end of the outer fixing member. Thereby, it can prevent that the foreign material which penetrate | invades along a groove | channel invades in an axial direction inside rather than the broken part of a groove | channel.

内側回転部材の軸受構造の溝は、溝底径寸法が一定になるよう形成されてもよいが、好ましくは、溝の溝底径寸法が軸線方向外側へ向かうにつれて大きくなるよう形成される。かかる実施形態によれば、回転中心から溝底までの距離が軸線方向外側に向かうにつれて大きくなる。これにより、軸線方向外側に向かうにつれて大きな遠心力が溝に作用して、溝内に存在する異物を効率よく排出することができる。 The groove of the bearing structure of the inner rotary member may be formed such that the groove bottom diameter dimension is constant, but is preferably formed such that the groove bottom diameter dimension of the groove increases toward the outside in the axial direction. According to this embodiment, the distance from the rotation center to the groove bottom increases as it goes outward in the axial direction. Thereby, a big centrifugal force acts on a groove | channel as it goes to an axial direction outer side, and the foreign material which exists in a groove | channel can be discharged | emitted efficiently.

このようにロールの軸受構造にかかる本発明は、外側回転部材の内周面には外側回転部材の軸線方向外側端面と接続する溝が形成され、溝は少なくとも一部において外側回転部材の正回転方向に対し鋭角となるよう斜め方向に延びることから、外側回転部材の正回転時に軸線方向外方から冷却水や洗浄水等といった異物が飛来しても、異物は外側回転部材の軸線方向外側端面でせき止められ、溝に流入することができない。したがって、異物が溝を通過して軸線方向内方へ侵入することを防止できる。しかも、万一異物が、溝や、外側回転部材内周面上に侵入しても、溝が異物を軸線方向外側へ付勢して異物を速やかに排出することができる。このため、ロールの軸受の耐久性が向上する。   As described above, according to the present invention relating to the roller bearing structure, a groove is formed on the inner circumferential surface of the outer rotating member so as to be connected to the outer end surface in the axial direction of the outer rotating member. Because it extends in an oblique direction so as to make an acute angle with respect to the direction, even if foreign matter such as cooling water or washing water comes from the outside in the axial direction during the forward rotation of the outer rotating member, the foreign matter remains on the outer end surface in the axial direction of the outer rotating member. It is blocked and cannot flow into the groove. Therefore, it is possible to prevent foreign matter from entering the axial direction inward through the groove. In addition, even if a foreign object enters the groove or the inner peripheral surface of the outer rotating member, the groove can urge the foreign object outward in the axial direction and quickly discharge the foreign object. For this reason, the durability of the roller bearing is improved.

また内側回転部材の軸受構造は、内側回転部材の外周面には外側固定部材の軸線方向端よりも軸線方向内側および外側にまたがって延びる溝が形成され、溝は少なくとも一部において内側回転部材の正回転方向に対し鋭角となるよう斜め方向に延びる。これにより、内側回転部材の正回転時に軸線方向外方から冷却水や洗浄水等といった異物が飛来して、溝および内側回転部材外周面上に侵入しても、溝が異物を軸線方向外側へ付勢して異物を速やかに排出することができる。したがって、軸受の耐久性が向上する。 The axial受構granulation of the inner rotary member, the groove extending across the axially inward and outward from the axial end of the outer fixing member is formed on the outer peripheral surface of the inner rotational member, the inner rotating member in the groove at least partially It extends in an oblique direction so as to have an acute angle with respect to the positive rotation direction. As a result, even if foreign matter such as cooling water or washing water comes from the outside in the axial direction during the forward rotation of the inner rotating member and enters the outer peripheral surface of the groove and the inner rotating member, the groove moves the foreign matter outward in the axial direction. The foreign matter can be quickly discharged by energizing. Therefore, the durability of the bearing is improved.

以下、本発明の実施の形態を、図面に示す実施例に基づき詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail based on examples shown in the drawings.

図１は、本実施例になる軸受構造を備えたバックアップロールの全体を示す縦断面図である。   FIG. 1 is a longitudinal sectional view showing an entire backup roll having a bearing structure according to this embodiment.

図１において、１１はバックアップロール等の外筒を示し、両端開口形状である。またワークロールの場合外筒１１の外周面は、図示しない帯状製品と転がりながら接触して、帯状製品のそりやひずみを矯正する。外筒１１の内径側には、回転しない固定軸１２が挿通される。外筒１１の軸線Ｏ方向中央部と端部との間に位置する内周面１３と、固定軸１２の外周面１４との間には、複数のころ１５を配置する。複数のころ１５は、内周面１３を外側軌道面とし、外周面１４を内側軌道面とするころ軸受１７を構成する。ころ軸受１７は、外筒１１の他方の端部についても同様に配置され、外筒１１を回転自在に支持する。   In FIG. 1, reference numeral 11 denotes an outer cylinder such as a backup roll, which is open at both ends. In the case of a work roll, the outer peripheral surface of the outer cylinder 11 is in contact with a strip-shaped product (not shown) while rolling to correct warpage and distortion of the strip-shaped product. A non-rotating fixed shaft 12 is inserted into the inner diameter side of the outer cylinder 11. A plurality of rollers 15 are arranged between the inner peripheral surface 13 located between the central portion and the end portion in the axis O direction of the outer cylinder 11 and the outer peripheral surface 14 of the fixed shaft 12. The plurality of rollers 15 constitutes a roller bearing 17 having an inner peripheral surface 13 as an outer raceway surface and an outer peripheral surface 14 as an inner raceway surface. The roller bearing 17 is similarly arranged at the other end of the outer cylinder 11 and rotatably supports the outer cylinder 11.

外筒１１は、ころ軸受１７よりも軸線Ｏ方向端部側に環状の段差１６を有する。段差１６よりも軸線Ｏ方向外側における外筒１１の内周面２０の内径は、内周面１３の内径よりも大きい。段差１６には、リング部材１８を押し当てて、内周面２０に係合固定する。かかるリング部材１８の軸線方向位置で、固定軸１２は段差１９を伴って端部側、すなわち軸線Ｏ方向外側の外径が小さい。段差１９よりも軸線Ｏ方向外側の外周面２１には、玉軸受２２の内輪２２ｉを嵌合固定する。また、内輪２２ｉと対応する外筒１１の内周面１３には玉軸受２２の外輪２２ｏを嵌合固定する。これら内輪２２ｉおよび外輪２２ｏ間には複数の玉２２ｔを配列する。また、内輪２２ｉおよび外輪２２ｏ間における軸線Ｏ方向両側部にはシール部材２２ｓをそれぞれ配置する。外周面２１のうち内輪２２ｉが取り付けられる箇所には、内輪２２ｉの軸線Ｏ方向寸法よりも小さな溝幅のリング溝３２を全周に亘り刻設し、このリング溝３２にＯリング３３を嵌合する。Ｏリング３３は内輪２２ｉの内周面と密着して、内輪２２ｉおよび外周面２１間の隙間を封止する。   The outer cylinder 11 has an annular step 16 on the end side in the axis O direction with respect to the roller bearing 17. The inner diameter of the inner peripheral surface 20 of the outer cylinder 11 outside the step 16 in the direction of the axis O is larger than the inner diameter of the inner peripheral surface 13. A ring member 18 is pressed against the step 16 to be engaged and fixed to the inner peripheral surface 20. At a position in the axial direction of the ring member 18, the fixed shaft 12 has a step 19 and has a small outer diameter on the end side, that is, on the outer side in the axis O direction. The inner ring 22 i of the ball bearing 22 is fitted and fixed to the outer peripheral surface 21 outside the step 19 in the axis O direction. Further, the outer ring 22o of the ball bearing 22 is fitted and fixed to the inner peripheral surface 13 of the outer cylinder 11 corresponding to the inner ring 22i. A plurality of balls 22t are arranged between the inner ring 22i and the outer ring 22o. Further, seal members 22s are respectively disposed on both sides in the axis O direction between the inner ring 22i and the outer ring 22o. A ring groove 32 having a groove width smaller than the dimension of the inner ring 22i in the direction of the axis O is engraved over the entire circumference of the outer peripheral surface 21 where the inner ring 22i is attached, and an O-ring 33 is fitted into the ring groove 32. To do. The O-ring 33 is in close contact with the inner peripheral surface of the inner ring 22 i and seals the gap between the inner ring 22 i and the outer peripheral surface 21.

玉軸受２２よりも軸線Ｏ方向外側には、リング部材２３と、カラー２４と、外筒クリップ２５と、固定軸クリップ２６とを配設する。外筒１１と、外筒１１の内周面２０に固定されたリング部材２３は、外側回転部材に含まれる。固定軸１２と、固定軸１２の外周面２１に固定されたカラー２４は、内側固定部材に含まれる。   A ring member 23, a collar 24, an outer cylinder clip 25, and a fixed shaft clip 26 are disposed outside the ball bearing 22 in the direction of the axis O. The outer cylinder 11 and the ring member 23 fixed to the inner peripheral surface 20 of the outer cylinder 11 are included in the outer rotating member. The fixed shaft 12 and the collar 24 fixed to the outer peripheral surface 21 of the fixed shaft 12 are included in the inner fixing member.

図２は、これらリング部材２３、カラー２４、外筒クリップ２５、および固定軸クリップ２６等を拡大して示す縦断面図である。また図３は、リング部材２３の縦断面図である。また図４は、リング部材２３の内周面の展開図である。リング部材２３は、所定の内径の内周面および外周を備えた筒状の部材であり、その外周が外筒１１の内周面２０に嵌合固定され、その内周面には後述する螺旋溝２７が刻設される。   FIG. 2 is an enlarged longitudinal sectional view showing the ring member 23, the collar 24, the outer cylinder clip 25, the fixed shaft clip 26, and the like. FIG. 3 is a longitudinal sectional view of the ring member 23. FIG. 4 is a development view of the inner peripheral surface of the ring member 23. The ring member 23 is a cylindrical member having an inner peripheral surface and an outer periphery having a predetermined inner diameter, and the outer periphery is fitted and fixed to the inner peripheral surface 20 of the outer cylinder 11. A groove 27 is cut.

リング部材２３は、軸受２２よりも軸線方向外方になる外筒１１の軸線Ｏ方向外側端部に固定される。ここで、リング部材２３の外周面が外筒１１の内周面に固定される。リング部材２３は、所定の第１内径を有する第１領域３４と、第１領域３４よりも軸受２２側になる軸線方向内側に位置し第１内径よりも内径が大きい第２内径を有する第２領域３５とを有する。リング部材２３は、外筒１１の内周面２０よりも小径であり、軸線Ｏ方向外側に外側端面２３ｓを有する。またリング部材２３は、第１領域３４の軸線Ｏ方向内方に平坦な環状面２３ｕを有する。   The ring member 23 is fixed to the outer end of the outer cylinder 11 in the axial O direction that is outward in the axial direction relative to the bearing 22. Here, the outer peripheral surface of the ring member 23 is fixed to the inner peripheral surface of the outer cylinder 11. The ring member 23 has a first region 34 having a predetermined first inner diameter, and a second region having a second inner diameter that is located on the inner side in the axial direction on the bearing 22 side than the first region 34 and has a larger inner diameter than the first inner diameter. Region 35. The ring member 23 has a smaller diameter than the inner peripheral surface 20 of the outer cylinder 11, and has an outer end surface 23s on the outer side in the axis O direction. Further, the ring member 23 has a flat annular surface 23 u inward of the first region 34 in the direction of the axis O.

環状面２３ｕを境界としてリング部材２３の軸線Ｏ方向内側である第２領域３５は、軸線Ｏ方向外側の第１領域３４よりも内径が大きくなる（第１内径＜第２内径）。第１領域３４の内周面には螺旋溝２７が刻設される。第２領域３５の軸線Ｏ方向内側端は外輪２２ｏへ突き当てられて、外輪２２ｏが軸線Ｏ方向外側に抜け出ることを防止する。本実施例の第２領域３５は、第１部材３４と一体結合してリング部材２３を構成するが、第２領域３５と第１領域３４とは別部材であって、第１領域３４がリング部材２３を構成してもよい。また第１領域３４にある溝底径は、第２領域３５の第２内径と同一あるいは大きくてもよい。   The inner diameter of the second region 35 on the inner side in the axis O direction of the ring member 23 with the annular surface 23u as a boundary is larger than that of the first region 34 on the outer side in the axis O direction (first inner diameter <second inner diameter). A spiral groove 27 is formed on the inner peripheral surface of the first region 34. The inner end of the second region 35 in the axis O direction is abutted against the outer ring 22o to prevent the outer ring 22o from slipping out of the axis O direction. The second region 35 of the present embodiment is integrally coupled with the first member 34 to form the ring member 23. However, the second region 35 and the first region 34 are separate members, and the first region 34 is a ring. The member 23 may be configured. The groove bottom diameter in the first region 34 may be the same as or larger than the second inner diameter of the second region 35.

カラー２４は、リング形状であって、その内周が固定軸１２の外周面２１に嵌合固定される。そして、カラー２４の外周面２８がリング部材２３の内周面と対面する。リング部材２３の内周面の内径は、カラー２４の外周面２８の外径よりも僅かに大きく、リング部材２３の内周面は外周面２８と僅かな隙間を介して対面する。この隙間の径方向幅は、できるだけ小さいことが望ましい。異物がこの隙間を軸線Ｏ方向内方へ侵入し難くするため、およびこの隙間に侵入した異物を軸線Ｏ方向外方へ排出し易くするためである。なお、図示はしなかったが、場合によりカラー２４を省略して、リング部材２３の内周面を固定軸１２の外周面２１と僅かな隙間を介して対面させてもよい。   The collar 24 has a ring shape, and its inner periphery is fitted and fixed to the outer peripheral surface 21 of the fixed shaft 12. The outer peripheral surface 28 of the collar 24 faces the inner peripheral surface of the ring member 23. The inner diameter of the inner peripheral surface of the ring member 23 is slightly larger than the outer diameter of the outer peripheral surface 28 of the collar 24, and the inner peripheral surface of the ring member 23 faces the outer peripheral surface 28 through a slight gap. The radial width of the gap is desirably as small as possible. This is to make it difficult for foreign matter to enter the gap inward in the direction of the axis O, and to facilitate discharging foreign matter that has entered the gap outward in the direction of the axis O. Although not shown, the collar 24 may be omitted in some cases, and the inner peripheral surface of the ring member 23 may face the outer peripheral surface 21 of the fixed shaft 12 through a slight gap.

好ましくは、カラー２４の軸線方向内側にフランジ部３６を形成する。フランジ部３６は外周面２８から径方向外方に向かって突出する。フランジ部３６は、万一異物が螺旋溝２７よりも軸線Ｏ方向内方へ侵入しても、かかる異物が軸受２２へ向かってさらに侵入することを防止する。   Preferably, the flange portion 36 is formed inside the collar 24 in the axial direction. The flange portion 36 protrudes radially outward from the outer peripheral surface 28. The flange portion 36 prevents the foreign matter from further entering the bearing 22 even if a foreign matter enters the axial O direction inward of the spiral groove 27.

固定軸クリップ２６は、リング形状であって、外周面２１に刻設されて全周に亘り延在するリング溝３０に係合固定されて、カラー２４が軸線Ｏ方向外側に抜け出ることを防止する。   The fixed shaft clip 26 has a ring shape and is engaged and fixed in a ring groove 30 that is engraved on the outer peripheral surface 21 and extends over the entire circumference, thereby preventing the collar 24 from slipping out in the direction of the axis O. .

外筒クリップ２５は、リング形状であって、内周面２０に刻設されて全周に亘り延在するリング溝２９に係合固定されて、リング部材２３が軸線Ｏ方向外側に抜け出ることを防止する。   The outer clip 25 is ring-shaped, and is engaged and fixed in a ring groove 29 that is engraved on the inner peripheral surface 20 and extends over the entire circumference, so that the ring member 23 is pulled out outward in the axis O direction. To prevent.

図３および図４に示すように、リング部材２３の螺旋溝２７は、リング部材２３の軸線Ｏ方向外側端面２３ｓから環状面２３ｕまで形成されて、外筒１１の回転軸線Ｏを中心として雌ねじのように螺旋状に延びる。リング部材２３は外筒１１とともに矢の向きに回転するところ、螺旋溝２７は、外筒の正回転方向に対し角度θで斜め方向に延びる。角度θは鋭角であり（０°＜θ＜９０°）、好ましくは０°＜θ＜４５°の範囲である。   As shown in FIGS. 3 and 4, the spiral groove 27 of the ring member 23 is formed from the outer end surface 23 s of the ring member 23 in the axis O direction to the annular surface 23 u, and has a female screw centered on the rotation axis O of the outer cylinder 11. It extends like a spiral. When the ring member 23 rotates in the direction of the arrow together with the outer cylinder 11, the spiral groove 27 extends obliquely at an angle θ with respect to the normal rotation direction of the outer cylinder. The angle θ is an acute angle (0 ° <θ <90 °), and preferably in the range of 0 ° <θ <45 °.

図５および図６は、螺旋溝２７を、図４のＡ−Ａで断面とし、矢印の向きにみた状態を示す説明図である。図５に示すように螺旋溝２７の溝底３１は勾配φがなく、螺旋溝２７の溝深さが一定である。   5 and 6 are explanatory views showing a state in which the spiral groove 27 is taken along the line AA of FIG. 4 and viewed in the direction of the arrow. As shown in FIG. 5, the groove bottom 31 of the spiral groove 27 has no gradient φ, and the groove depth of the spiral groove 27 is constant.

このように螺旋溝２７はリング部材２３の外径寄りに溝底を有する他、図示はしなかったが螺旋溝２７の溝深さをリング部材２３の径方向厚みと一致させてもよい。つまり、リング部材２３に螺旋状のスリットを設ける。この場合、リング部材２３を内周面２０に嵌合固定することによって、内周面２０が螺旋溝の溝底になる。   In this way, the spiral groove 27 has a groove bottom near the outer diameter of the ring member 23, and although not shown, the groove depth of the spiral groove 27 may be matched with the radial thickness of the ring member 23. That is, the ring member 23 is provided with a spiral slit. In this case, the inner peripheral surface 20 becomes the groove bottom of the spiral groove by fitting and fixing the ring member 23 to the inner peripheral surface 20.

あるいは図６に示すように、螺旋溝２７の溝底３１に一定の勾配φを設け、外側端面２３ｓに近づくにつれて溝深さが大きくなるようにしてもよい。   Alternatively, as shown in FIG. 6, a constant gradient φ may be provided at the groove bottom 31 of the spiral groove 27 so that the groove depth increases as the outer end face 23s is approached.

本実施例によれば、玉軸受２２やころ軸受１７といった軸受よりも軸線Ｏ方向外方の外筒１１端部に位置し、外筒１１の内周面２０に取り付けられたリング部材２３を備えることから、軸線Ｏ方向外方からリング部材２３に冷却水や洗浄水等といった異物が飛来しても、異物はリング部材２３の軸線方向外側端面２３ｓでせき止められ、軸線方向内方へ流入することができない。しかも、リング部材２３の内周面にはリング部材２３の軸線方向外側端面２３ｓと接続する螺旋溝２７が形成され、螺旋溝２７は外筒１１の正回転方向に対し鋭角θとなるよう斜め方向に延びることから、外筒１１の正回転に伴い螺旋溝２７も回転する。これにより、万一異物が、螺旋溝２７や、リング部材２３の内周面上に侵入しても、螺旋溝２７がリング部材２３の内周面上に侵入した異物を軸線方向外方へ速やかに排出することができる。したがって、玉軸受２２およびころ軸受１７の寿命を長くすることができる。   According to the present embodiment, the ring member 23 is provided on the inner peripheral surface 20 of the outer cylinder 11, located at the end of the outer cylinder 11 outside the bearings such as the ball bearing 22 and the roller bearing 17 in the direction of the axis O. Therefore, even if foreign matter such as cooling water or cleaning water comes to the ring member 23 from the outside in the direction of the axis O, the foreign matter is blocked by the axially outer end face 23s of the ring member 23 and flows inward in the axial direction. I can't. In addition, a spiral groove 27 connected to the axially outer end face 23s of the ring member 23 is formed on the inner peripheral surface of the ring member 23, and the spiral groove 27 is inclined so as to have an acute angle θ with respect to the positive rotation direction of the outer cylinder 11. Therefore, the spiral groove 27 also rotates with the forward rotation of the outer cylinder 11. As a result, even if foreign matter enters the spiral groove 27 or the inner peripheral surface of the ring member 23, the foreign matter that the spiral groove 27 has entered the inner peripheral surface of the ring member 23 quickly moves outward in the axial direction. Can be discharged. Therefore, the life of the ball bearing 22 and the roller bearing 17 can be extended.

リング部材２３は、所定の第１内径を有する第１領域３４と、第１領域３４よりも軸線方向内側に位置し第１内径よりも内径が大きい第２内径を有する第２領域３５とを有し、螺旋溝２７は、第１領域３４の内周面に形成される。そして螺旋溝２７は第１領域３４の環状面２３ｕと接続することや、螺旋溝２７の溝底３１に勾配φ（図６）が設けられていることから、環状面２３ｕよりも軸線方向内側に侵入した異物をも軸線方向外方へ速やかに排出することができる。   The ring member 23 includes a first region 34 having a predetermined first inner diameter, and a second region 35 having a second inner diameter that is located on the inner side in the axial direction than the first region 34 and has a larger inner diameter than the first inner diameter. The spiral groove 27 is formed on the inner peripheral surface of the first region 34. Since the spiral groove 27 is connected to the annular surface 23u of the first region 34 and the groove bottom 31 of the spiral groove 27 is provided with a gradient φ (FIG. 6), the spiral groove 27 is located on the inner side in the axial direction from the annular surface 23u. The invading foreign matter can be quickly discharged outward in the axial direction.

この点につき詳述すると、第１領域３４の円筒内周面は内径が一定（第１内径）であり、軸線方向における勾配を有しない。この円筒内周面に形成された螺旋溝２７は、図５に示すように溝深さが一定になるよう形成されてもよいが、好ましくは図６に示すように溝深さが軸線Ｏ方向外側へ向かうにつれて勾配φで大きくなるよう形成される。これにより、リング部材２３内周面上に存在する異物を効率よく排出することができる。また、溝底３１がテーパ孔の表面のように勾配φで傾斜することから、回転中心Ｏから溝底３１までの距離が軸線方向外側に向かうにつれて大きくなる。そうすると、外筒１１の正回転による遠心力が軸線方向外側に向かうにつれて大きくなり、かかる遠心力によって、溝３７の異物排出能力を向上させることができる。したがって、異物が溝３７を伝って軸線方向内方へ侵入することを防止することができる。   More specifically, the cylindrical inner peripheral surface of the first region 34 has a constant inner diameter (first inner diameter) and does not have a gradient in the axial direction. The spiral groove 27 formed on the inner circumferential surface of the cylinder may be formed so that the groove depth is constant as shown in FIG. 5, but preferably the groove depth is in the direction of the axis O as shown in FIG. It forms so that it may become large with gradient (phi) as it goes outside. Thereby, the foreign material which exists on the inner peripheral surface of the ring member 23 can be efficiently discharged. Further, since the groove bottom 31 is inclined at a gradient φ like the surface of the tapered hole, the distance from the rotation center O to the groove bottom 31 increases as it goes outward in the axial direction. If it does so, the centrifugal force by the normal rotation of the outer cylinder 11 will become large as it goes to an axial direction outer side, and the foreign material discharge | emission capability of the groove | channel 37 can be improved with this centrifugal force. Therefore, foreign matter can be prevented from entering the axial direction inward through the groove 37.

また本実施例によれば、軸受２２の内輪２２ｉの内周面に固定された固定軸１２と、リング部材２３に対面する位置で固定軸１２に固定された環状のカラー２４とを有し、カラー２４は、第２領域３５の内周面に対面する位置で径方向外方に向かって突出したフランジ部３６を備えることから、軸受２２と第１領域３４との間にフランジ部３６が介在する。したがって、異物が軸受２２に向かってさらに侵入することを防止することができる。   Further, according to the present embodiment, the fixed shaft 12 fixed to the inner peripheral surface of the inner ring 22i of the bearing 22 and the annular collar 24 fixed to the fixed shaft 12 at a position facing the ring member 23, Since the collar 24 includes a flange portion 36 that protrudes radially outward at a position facing the inner peripheral surface of the second region 35, the flange portion 36 is interposed between the bearing 22 and the first region 34. To do. Therefore, it is possible to prevent foreign matter from further entering the bearing 22.

次に本発明の他の実施例を説明する。図７は他の実施例を示す縦断面図であり、図８は同実施例のリング部材の縦断面図である。また図９は、リング部材の内周面の展開図である。この実施例につき、上述した実施例と共通する構成については同一の符号を付して説明を省略し、異なる構成について以下に説明する。この実施例では、リング部材２３の内周面に軸線方向外側端面２３ｓと接続する溝３７が周方向等間隔に複数本または１本形成される。溝３７は、軸線方向外側端面２３ｓからリング部材２３の軸線方向中程まで延び、環状面２３ｕとは接続しない。溝３７は図５または図６に示すように数ｍｍの深さを有し、図示はしなかったが溝底から軸線までの径が第２領域３５の第２内径（筒状部内周面３５ｎ）より大きくてもよい。   Next, another embodiment of the present invention will be described. FIG. 7 is a longitudinal sectional view showing another embodiment, and FIG. 8 is a longitudinal sectional view of a ring member of the embodiment. FIG. 9 is a development view of the inner peripheral surface of the ring member. In this embodiment, the same components as those in the above-described embodiment are denoted by the same reference numerals, description thereof is omitted, and different configurations will be described below. In this embodiment, a plurality of or one groove 37 is formed on the inner peripheral surface of the ring member 23 at regular intervals in the circumferential direction so as to connect to the axially outer end surface 23s. The groove 37 extends from the axially outer end surface 23s to the middle in the axial direction of the ring member 23, and is not connected to the annular surface 23u. The groove 37 has a depth of several millimeters as shown in FIG. 5 or FIG. 6. Although not shown, the diameter from the groove bottom to the axis is the second inner diameter of the second region 35 (inner cylindrical inner surface 35n). ) May be larger.

溝３７はリング部材２３の外径寄りに溝底を有する他、溝３７の溝深さをリング部材２３の径方向厚みと一致させてもよい。つまり、リング部材２３にスリットを設ける。この場合、リング部材２３を内周面２０に嵌合固定することによって、内周面２０が溝３７の溝底になる。   The groove 37 has a groove bottom near the outer diameter of the ring member 23, and the groove depth of the groove 37 may be matched with the radial thickness of the ring member 23. That is, the ring member 23 is provided with a slit. In this case, the inner peripheral surface 20 becomes the groove bottom of the groove 37 by fitting and fixing the ring member 23 to the inner peripheral surface 20.

この実施例によれば、図９に示すように溝３７が外筒１１の正回転方向に対し鋭角θとなるよう斜め方向に延びることから、外筒１１の正回転に伴い溝３７も回転する。これにより、万一異物が、溝３７や、リング部材２３の内周面上に侵入しても、溝３７がリング部材２３の内周面上に侵入した異物を軸線方向外方へ速やかに排出することができる。   According to this embodiment, as shown in FIG. 9, the groove 37 extends in an oblique direction so as to have an acute angle θ with respect to the positive rotation direction of the outer cylinder 11, so that the groove 37 also rotates with the positive rotation of the outer cylinder 11. . As a result, even if foreign matter enters the groove 37 or the inner peripheral surface of the ring member 23, the foreign matter that has entered the inner peripheral surface of the ring member 23 is quickly discharged outward in the axial direction. can do.

また溝３７は、第１領域３４の環状面２３ｕから離れて形成されることから、万一異物が溝３７に侵入しても、異物が溝３７を伝って環状面２３ｕよりも軸線Ｏ方向内方にさらに侵入することを防止することができる。   In addition, since the groove 37 is formed away from the annular surface 23u of the first region 34, even if foreign matter enters the groove 37, the foreign matter travels through the groove 37 and is more in the axis O direction than the annular surface 23u. Can be prevented from entering further.

次に本発明のさらに他の実施例を説明する。図１０はさらに他の実施例を示す縦断面図であり、図１１は同実施例のリング部材の縦断面図である。また図１２は、リング部材の内周面の展開図である。この実施例につき、上述した実施例と共通する構成については同一の符号を付して説明を省略し、異なる構成について以下に説明する。この実施例では、溝３７が、第１領域３４の内周面の環状面２３ｕから外側端面２３ｓまで形成される。溝３７は図５または図６に示すように数ｍｍの深さを有し、図示はしなかったが溝底から軸線までの径が第２領域３５の第２内径（筒状部内周面３５ｎ）より大きくてもよい。   Next, still another embodiment of the present invention will be described. FIG. 10 is a longitudinal sectional view showing still another embodiment, and FIG. 11 is a longitudinal sectional view of a ring member of the embodiment. FIG. 12 is a development view of the inner peripheral surface of the ring member. In this embodiment, the same components as those in the above-described embodiment are denoted by the same reference numerals, description thereof is omitted, and different configurations will be described below. In this embodiment, the groove 37 is formed from the annular surface 23u on the inner peripheral surface of the first region 34 to the outer end surface 23s. The groove 37 has a depth of several millimeters as shown in FIG. 5 or FIG. 6. Although not shown, the diameter from the groove bottom to the axis is the second inner diameter of the second region 35 (inner cylindrical inner surface 35n). ) May be larger.

この実施例によれば、溝３７が第１領域３４の環状面２３ｕから軸線方向外側端面２３ｓまで形成されることから、溝３７がリング部材２３の環状面２３ｕと接続する。これにより、万一異物がリング部材２３よりも軸線方向内方に侵入した場合であっても、かかる異物を軸線方向外方へ排出することが可能になる。   According to this embodiment, since the groove 37 is formed from the annular surface 23u of the first region 34 to the axially outer end surface 23s, the groove 37 is connected to the annular surface 23u of the ring member 23. As a result, even if a foreign object has entered the axial direction inward of the ring member 23, the foreign object can be discharged outward in the axial direction.

次に本発明のさらに他の実施例を説明する。図１３はさらに他の実施例を示す縦断面図であり、図１４は同実施例のリング部材の縦断面図である。また図１５は、リング部材の内周面の展開図である。この実施例につき、上述した実施例と共通する構成については同一の符号を付して説明を省略し、異なる構成について以下に説明する。この実施例の溝３７は、一部において外筒１１の正回転方向に対し鋭角θとなるよう斜め方向に延びる。具体的には、第１領域３４の内周面に形成された溝３７が、環状面２３ｕから外側端面２３ｓまで延びる。そして溝３７のうち軸線方向内側の部分が正回転方向に対し鋭角θとなるよう斜め方向に延び、溝３７のうち軸線方向外側の部分３７ｈは、外筒１１の回転中心である軸線Ｏと平行に延びる。溝３７は図５または図６に示すように数ｍｍの深さを有し、図示はしなかったが溝底から軸線までの径が領域３５の第２内径（筒状部内周面３５ｎ）より大きくてもよい。   Next, still another embodiment of the present invention will be described. FIG. 13 is a longitudinal sectional view showing still another embodiment, and FIG. 14 is a longitudinal sectional view of a ring member of the embodiment. FIG. 15 is a development view of the inner peripheral surface of the ring member. In this embodiment, the same components as those in the above-described embodiment are denoted by the same reference numerals, description thereof is omitted, and different configurations will be described below. The groove 37 of this embodiment partially extends in an oblique direction so as to have an acute angle θ with respect to the positive rotation direction of the outer cylinder 11. Specifically, a groove 37 formed on the inner peripheral surface of the first region 34 extends from the annular surface 23u to the outer end surface 23s. The axially inner portion of the groove 37 extends in an oblique direction so as to have an acute angle θ with respect to the positive rotation direction, and the axially outer portion 37 h of the groove 37 is parallel to the axis O that is the rotation center of the outer cylinder 11. Extend to. The groove 37 has a depth of several millimeters as shown in FIG. 5 or FIG. 6. Although not shown, the diameter from the groove bottom to the axis is larger than the second inner diameter of the region 35 (cylindrical inner peripheral surface 35n). It can be large.

この実施例によれば、溝３７のうち軸線方向外側の部分が軸線Ｏと平行に延び、溝３７のうち軸線方向中程の部分が正回転方向に対し鋭角θとなるよう斜め方向に延びることから、軸線方向中程の溝３７によって軸線方向外方へ付勢された異物を、軸線方向外側の平行溝３７ｈを流下させることが可能になる。また、溝３７は外側端面２３ｓよりも軸線Ｏ方向内方の位置で折れて延びることから、平行溝３７ｈを伝って侵入した異物がこの折れ箇所よりも軸線方向内方に侵入することを防止することができる。   According to this embodiment, the axially outer portion of the groove 37 extends in parallel with the axis O, and the central portion of the groove 37 extends in an oblique direction so as to have an acute angle θ with respect to the positive rotation direction. Therefore, the foreign matter urged outward in the axial direction by the groove 37 in the middle in the axial direction can flow down in the parallel groove 37h on the outer side in the axial direction. Further, since the groove 37 extends and bends at a position on the inner side in the axis O direction from the outer end surface 23s, the foreign matter that has entered through the parallel groove 37h is prevented from entering inward in the axial direction from the bent portion. be able to.

類似の形態として第１領域３４の内周面に形成された溝３７が、環状面２３ｕから外側端面２３ｓまで延び、軸線方向中程で折れている。そして図示はしなかったが折れ箇所よりも軸線方向外側の溝３７部分が正回転方向に対し鋭角θとなるよう斜め方向に延び、折れ箇所よりも軸線方向内側の溝３７部分（３７ｈと同様）が環状面２３ｕまで外筒１１の回転中心である軸線Ｏと平行に延びる。溝３７は図５または図６に示すように数ｍｍの溝深さを有し、図示はしなかったが溝底から軸線までの径が領域３５の第２内径（筒状部内周面３５ｎ）より大きくてもよい。   As a similar form, a groove 37 formed on the inner peripheral surface of the first region 34 extends from the annular surface 23u to the outer end surface 23s and is bent in the middle in the axial direction. Although not shown, the groove 37 portion on the axially outer side from the folding portion extends in an oblique direction so as to have an acute angle θ with respect to the positive rotation direction, and the groove 37 portion on the axially inner side from the folding portion (similar to 37h). Extends to the annular surface 23u in parallel with the axis O which is the center of rotation of the outer cylinder 11. The groove 37 has a groove depth of several millimeters as shown in FIG. 5 or FIG. 6. Although not shown, the diameter from the groove bottom to the axis is the second inner diameter of the region 35 (inner cylindrical inner surface 35n). It may be larger.

この実施例によれば、溝３７のうち外側端面２３ｓから軸線方向中程までの部分が正回転方向に対し鋭角θとなるよう斜め方向に延びることから、正回転時外方から飛来する異物は外側端面２３ｓでせき止められ軸線方向内方へ侵入することができない。さらに外部より溝３７に沿って異物が侵入したとしても、軸線方向中程に位置する溝３７の折れ個所にせき止められ軸線方向内方への侵入が防止される。また溝３７に存在する水分等の異物は正回転時、溝３７によって軸線方向外方へ遠心力により付勢され排出される。   According to this embodiment, the portion of the groove 37 from the outer end surface 23s to the middle in the axial direction extends in an oblique direction so as to have an acute angle θ with respect to the positive rotation direction. It is blocked by the outer end face 23s and cannot enter the axially inward direction. Further, even if foreign matter enters along the groove 37 from the outside, it is dammed up at the bent portion of the groove 37 located in the middle of the axial direction to prevent intrusion inward in the axial direction. Further, foreign matters such as moisture existing in the groove 37 are urged and discharged by the groove 37 outward in the axial direction by the groove 37 during forward rotation.

これまで説明した実施例では、ロールが回転する場合であるが、本発明は、軸が回転する場合にも適用可能である。この場合、固定された筒状部材と、筒状部材に挿通された回転軸と、筒状部材の内周面および回転軸の外周面との間に設けられて回転軸を回転自在に支持する軸受と、軸受よりも軸線方向外方の筒状部材端部に位置し、回転軸の外周面に取り付けられたリング部材とを備え、リング部材の外周面にはリング部材の軸線方向外側端面と接続する溝が形成され、溝は少なくとも一部において回転軸の正回転方向に対し鋭角となるよう斜め方向に延びる。   In the embodiment described so far, the roll is rotated. However, the present invention is also applicable to the case where the shaft rotates. In this case, it is provided between the fixed cylindrical member, the rotating shaft inserted through the cylindrical member, and the inner peripheral surface of the cylindrical member and the outer peripheral surface of the rotating shaft, and rotatably supports the rotating shaft. A bearing, and a ring member positioned at the end of the cylindrical member that is axially outward of the bearing and attached to the outer peripheral surface of the rotary shaft, and the outer peripheral surface of the ring member includes an outer end surface in the axial direction of the ring member A connecting groove is formed, and the groove extends in an oblique direction so as to be at an acute angle with respect to the positive rotation direction of the rotation shaft at least partially.

以上、図面を参照してこの発明の実施形態を説明したが、この発明は、図示した実施形態のものに限定されない。図示した実施形態に対して、この発明と同一の範囲内において、あるいは均等の範囲内において、種々の修正や変形を加えることが可能である。   As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

本発明の軸受構造を備えたバックアップロールの全体を示す縦断面図である。It is a longitudinal cross-sectional view which shows the whole backup roll provided with the bearing structure of this invention. 同実施例の軸受構造を示す縦断面図である。It is a longitudinal cross-sectional view which shows the bearing structure of the Example. 同実施例のリング部材の縦断面図である。It is a longitudinal cross-sectional view of the ring member of the Example. 同実施例のリング部材内周面の展開図である。It is an expanded view of the ring member internal peripheral surface of the Example. 溝をＡ−Ａで断面とし、矢印の向きにみた状態を示す溝深さの説明図である。It is explanatory drawing of the groove depth which shows the state which made the groove | channel the cross section by AA and it looked at the direction of the arrow. 溝の変形例であって、Ａ−Ａで断面とし、矢印の向きにみた状態を示す溝深さの説明図である。It is a modification of a groove | channel, Comprising: It is explanatory drawing of the groove depth which makes the cross section AA and shows the state seen from the direction of the arrow. 他の実施例の軸受構造を示す縦断面図である。It is a longitudinal cross-sectional view which shows the bearing structure of another Example. 同実施例のリング部材の縦断面図である。It is a longitudinal cross-sectional view of the ring member of the Example. 同実施例のリング部材内周面の展開図である。It is an expanded view of the ring member internal peripheral surface of the Example. さらに他の実施例の軸受構造を示す縦断面図である。It is a longitudinal cross-sectional view which shows the bearing structure of other Example. 同実施例のリング部材の縦断面図である。It is a longitudinal cross-sectional view of the ring member of the Example. 同実施例のリング部材内周面の展開図である。It is an expanded view of the ring member internal peripheral surface of the Example. さらに他の実施例の軸受構造を示す縦断面図である。It is a longitudinal cross-sectional view which shows the bearing structure of other Example. 同実施例のリング部材の縦断面図である。It is a longitudinal cross-sectional view of the ring member of the Example. 同実施例のリング部材内周面の展開図である。It is an expanded view of the ring member internal peripheral surface of the Example.

符号の説明Explanation of symbols

１１ 外筒、１２ 固定軸、１３ 内周面、１４ 外周面、１５ ころ、１６ 段差、１７ ころ軸受、１９ 段差、２０ 内周面、２１ 外周面、２２ 玉軸受、２３ リング部材、２３ｓ 外側端面、２３ｕ 環状面、２４ カラー、２５ 外筒クリップ、２６ 固定軸クリップ、２７ 螺旋溝、２８ カラー外周面、２９ リング溝、３０ リング溝、３１ 溝底、３２ リング溝、３３ Ｏリング、３４ 第１領域、３５ 第２領域、３５ｎ 筒状部内周面、３６ フランジ部、３７ 溝、３７ｈ 平行溝。   11 outer cylinder, 12 fixed shaft, 13 inner peripheral surface, 14 outer peripheral surface, 15 rollers, 16 step, 17 roller bearing, 19 step, 20 inner peripheral surface, 21 outer peripheral surface, 22 ball bearing, 23 ring member, 23s outer end surface , 23u annular surface, 24 collar, 25 outer cylinder clip, 26 fixed shaft clip, 27 spiral groove, 28 collar outer peripheral surface, 29 ring groove, 30 ring groove, 31 groove bottom, 32 ring groove, 33 O-ring, 34 first Area, 35 2nd area, 35n Cylindrical part inner peripheral surface, 36 Flange part, 37 groove | channel, 37h Parallel groove | channel.

Claims (8)

外筒および該外筒の軸線方向端部に固定されたリング部材を有する外側回転部材と、
前記外側回転部材に挿通された内側固定部材と、
前記外筒の内周面と前記内側固定部材の外周面との間に設けられて外側回転部材を回転自在に支持する軸受とを備え、
前記外側回転部材のうち前記リング部材よりも軸線方向外側に位置する軸線方向外側部分は、前記リング部材よりも大径であり、
前記内側固定部材のうち前記リング部材よりも軸線方向外側に位置する軸線方向外側部分は、前記リング部材よりも小径であり、
前記リング部材は、軸線方向内方に向く環状面および軸線方向外側端面を有し、当該リング部材の内周面には前記軸受よりも軸線方向外方の位置にあって前記環状面および前記軸線方向外側端面と接続する溝が１箇所または複数箇所形成され、
前記溝は少なくとも一部において外側回転部材の正回転方向に対し鋭角となるよう斜め方向に延びる、ロールの軸受構造。 An outer rotating member having an outer cylinder and a ring member fixed to an axial end of the outer cylinder;
An inner fixing member inserted through the outer rotating member;
A bearing provided between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner fixing member and rotatably supporting the outer rotating member;
The axial direction outer side part located in an axial direction outside rather than the ring member among the outer side rotation members is larger in diameter than the ring member,
The axially outer portion located on the outer side in the axial direction than the ring member of the inner fixing member has a smaller diameter than the ring member,
The ring member has an annular surface facing inward in the axial direction and an outer end surface in the axial direction, and the inner peripheral surface of the ring member is at an outer position in the axial direction than the bearing, and the annular surface and the axial line One or a plurality of grooves to be connected to the direction outer end surface are formed,
A roller bearing structure in which the groove extends in an oblique direction so that at least a part thereof has an acute angle with respect to the positive rotation direction of the outer rotating member. 前記溝は、前記外側回転部材の回転軸を中心として螺旋状に延びる、請求項１に記載のロールの軸受構造。   The roll groove bearing structure according to claim 1, wherein the groove extends spirally around a rotation axis of the outer rotation member. 前記溝は、前記外側回転部材の軸線方向外側端面よりも軸線方向内方の位置で折れて延びる、請求項１または２に記載のロールの軸受構造。   3. The roller bearing structure according to claim 1, wherein the groove is bent and extends at a position inward in the axial direction with respect to an axially outer end face of the outer rotating member. 前記溝は溝深さが一定になるよう形成される、請求項１〜３のいずれかに記載のロールの軸受構造。   The bearing structure for a roll according to claim 1, wherein the groove is formed to have a constant groove depth. 前記溝の溝深さが軸線方向外側へ向かうにつれて大きくなるよう形成される、請求項１〜３のいずれかに記載のロールの軸受構造。   The roller bearing structure according to claim 1, wherein the groove depth of the groove is formed so as to increase toward the outside in the axial direction. 前記リング部材は、所定の第１内径を有する第１領域と、前記第１領域よりも軸線方向内側に位置し前記第１内径よりも内径が大きい第２内径を有する第２領域とを有し、
前記溝は、前記第１領域の内周面に形成される、請求項１〜５のいずれかに記載のロールの軸受構造。 The ring member includes a first region having a predetermined first inner diameter, and a second region having a second inner diameter that is located on the inner side in the axial direction than the first region and has a larger inner diameter than the first inner diameter. ,
The roll groove bearing structure according to claim 1, wherein the groove is formed on an inner peripheral surface of the first region. 前記溝は、前記第１領域の軸線方向内方端から軸線方向外方端まで形成される、請求項６に記載のロールの軸受構造。   The roll groove bearing structure according to claim 6, wherein the groove is formed from an axially inner end to an axially outer end of the first region. 前記内側固定部材は、前記軸受の内輪の内周面に固定された固定軸と、前記リング部材に対面する位置で前記固定軸に固定された環状のカラーとを有し、
前記カラーは、前記第２領域の内周面に対面する位置で径方向外方に向かって突出したフランジ部を備える、請求項６または７に記載のロールの軸受構造。 The inner fixing member has a fixed shaft fixed to the inner peripheral surface of the inner ring of the bearing, and an annular collar fixed to the fixed shaft at a position facing the ring member,
The bearing structure for a roll according to claim 6 or 7, wherein the collar includes a flange portion that protrudes radially outward at a position facing the inner peripheral surface of the second region.
JP2008298255A 2008-11-21 2008-11-21 Roller bearing structure Expired - Fee Related JP5537799B2 (en)

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KR101913723B1 (en) * 2017-03-23 2018-11-01 주식회사 아이패스 Roller for preventing inflow dust

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JP6253188B2 (en) * 2013-11-01 2017-12-27 内山工業株式会社 Bearing sealing device

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JPS6023403U (en) * 1983-07-26 1985-02-18 株式会社　マルイ bicycle hub drainage device
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JP2581552Y2 (en) * 1991-12-02 1998-09-21 光洋精工株式会社 Bearing device for backup roll used in rolling mill
JP2006250198A (en) * 2005-03-09 2006-09-21 Nsk Ltd Roll support device
JP2008215416A (en) * 2007-02-28 2008-09-18 Ntn Corp Rolling bearing for steel

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101913723B1 (en) * 2017-03-23 2018-11-01 주식회사 아이패스 Roller for preventing inflow dust

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