JP2006349076A - Roll supporting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively prevent a leakage of grease existing inside a bearing or base oil in the grease to the outside regardless of a rotational direction of an outer cylinder. <P>SOLUTION: While externally fitting and fixing a seal ring 19a onto parts near both ends of a roll shaft not rotating at a time of use through the medium of a ring shape member, a pad member is internally fitted and fixed onto parts near both ends of an outer cylinder rotating at a time of use. An axial outside surface of the pad member and an axial inside surface of the seal ring 19a face each other through a gap. Projections 39, 39 are formed in a plurality of parts disposed at equal intervals circumferentially in the axial inside surface, each of which has an approximately trapezoidal shape. The tilting side surfaces 40a, 40b existing circumferentially on both sides are tilted in a direction separating from each other with distance radially outward. Grease or base oil packed in the gap is discharged radially inward and circulated to the bearing side by respective projections 40a, 40b. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、特に鉄鋼設備等に使用され、薄板材等の被矯正材のそりや歪みを矯正する目的で、この被矯正材に曲げ方向と引っ張り方向との力を加える事により塑性伸びを生じさせる為のテンションレベラーに組み込むワークロール、中間ロール、バックアップロール等のロール支持装置の改良に関する。   This invention is used especially for steel facilities and the like, and for the purpose of correcting warpage and distortion of a material to be straightened such as a thin plate material, a plastic elongation is generated by applying a force in the bending direction and the direction of tension to the material to be straightened. The present invention relates to improvements in roll support devices such as work rolls, intermediate rolls, and backup rolls incorporated in a tension leveler.

上記テンションレベラーには、ワークロール、中間ロール、バックアップロール等の複数のロール支持装置を組み込んでいる。例えば、図６は、これらロール支持装置のうち、バックアップロールの従来から考えられている構造の１例を示している。ロールである外筒１は、固定のロール軸２に対し、複数の針状ころ軸受３と玉軸受４とにより回転自在に支持している。このうちの玉軸受４を構成する内輪５の軸方向内（軸方向に関して「内」とは、外筒１及びロール軸２の軸方向中央側を言い、図１、２、６の左側。本明細書及び特許請求の範囲全体で同じ。）端面は、上記ロール軸２の外周面に形成した段差面６に突き当てており、上記内輪５の軸方向外（軸方向に関して「外」とは、外筒１及びロール軸２の軸方向端側を言い、図１、２、６の右側。本明細書及び特許請求の範囲全体で同じ。）端面は、上記ロール軸２の端部に外嵌したリング状部材７の内端面（図６の左端面）に突き当てている。このリング状部材７は、円筒状の本体部８の外端部（図６の右端部）外周面に外向フランジ状の鍔部９を設けている。そして、このリング状部材７の外端面を、上記ロール軸２の端部外周面に係止した止め輪１０により抑え付ける事により、このリング状部材７が上記玉軸受４から離れる方向に変位するのを阻止している。この構成により、上記内輪５は、上記ロール軸２に対する軸方向の変位が阻止される。   The tension leveler incorporates a plurality of roll support devices such as a work roll, an intermediate roll, and a backup roll. For example, FIG. 6 shows an example of a structure conventionally considered for a backup roll among these roll support devices. The outer cylinder 1 as a roll is rotatably supported by a plurality of needle roller bearings 3 and ball bearings 4 with respect to a fixed roll shaft 2. Of these, the inner side of the inner ring 5 constituting the ball bearing 4 (inside the axial direction, “inner” refers to the axially central side of the outer cylinder 1 and the roll shaft 2, and is the left side of FIGS. The same applies to the entire specification and claims.) The end face abuts against the step surface 6 formed on the outer peripheral surface of the roll shaft 2, and the outside of the inner ring 5 in the axial direction ("outside" with respect to the axial direction) The right side of FIGS. 1, 2, and 6 is the same in the entire specification and claims.) The end surface is outside the end of the roll shaft 2. It abuts against the inner end surface (left end surface in FIG. 6) of the fitted ring-shaped member 7. This ring-shaped member 7 is provided with an outward flange-shaped flange 9 on the outer peripheral surface of the outer end (right end in FIG. 6) of the cylindrical main body 8. The ring-shaped member 7 is displaced in a direction away from the ball bearing 4 by restraining the outer end surface of the ring-shaped member 7 with a retaining ring 10 locked to the outer peripheral surface of the end portion of the roll shaft 2. Is blocking. With this configuration, the inner ring 5 is prevented from axial displacement with respect to the roll shaft 2.

又、上記リング状部材７の中間部内周面に係止溝１１を全周に亙って形成すると共に、この係止溝１１に係止したＯリング１２を、この係止溝１１の底面と上記ロール軸２の外周面との間で弾性的に圧縮して、上記リング状部材７の内周面と上記ロール軸２の外周面との間を密封している。又、上記玉軸受４を構成する外輪１３は、外輪間座１４を介して、上記外筒１の中間部内周面に形成した段差面１８に突き当てている。   A locking groove 11 is formed on the inner peripheral surface of the intermediate portion of the ring-shaped member 7 over the entire circumference, and an O-ring 12 locked to the locking groove 11 is connected to the bottom surface of the locking groove 11. It compresses elastically between the outer peripheral surfaces of the roll shaft 2 and seals between the inner peripheral surface of the ring-shaped member 7 and the outer peripheral surface of the roll shaft 2. The outer ring 13 constituting the ball bearing 4 abuts against a step surface 18 formed on the inner peripheral surface of the intermediate portion of the outer cylinder 1 through an outer ring spacer 14.

更に、この外筒１の端部内周面に、ゴム製の筒部１５と摺接板１６とにより構成した当て部材１７を圧入固定している。又、上記リング状部材７の本体部８にゴム製のシールリング１９を外嵌固定すると共に、このシールリング１９に設けたシールリップ２０の先端縁を、上記摺接板１６の軸方向外側面に摺接させている。そしてこの構成により、上記外筒１の内周面と上記ロール軸２の外周面との間に存在し、前記針状ころ軸受３及び玉軸受４を設置した内部空間２５を外部から遮断している。この為、上記外筒１の外部からこの内部空間２５内に冷却水等の異物が進入する事が阻止される。即ち、バックアップロールは前記テンションレベラーに組み込んで使用するが、被矯正材の矯正に伴う温度上昇を抑えるべく、この被矯正材に冷却水を注ぐ必要がある。但し、この冷却水がバックアップロール内に入り込むと、軸受３、４の潤滑性が悪化して耐久性の低下を招く可能性がある。この為、上述の従来構造の場合には、上記当て部材１７の軸方向外側面に上記シールリング１９に設けたシールリップ２０の先端縁を摺接させる事により、上記内部空間２５内に冷却水等の異物が進入する事を阻止している。   Further, an abutting member 17 composed of a rubber cylinder 15 and a sliding contact plate 16 is press-fitted and fixed to the inner peripheral surface of the end of the outer cylinder 1. Further, a rubber seal ring 19 is fitted and fixed to the main body 8 of the ring-shaped member 7, and the tip edge of the seal lip 20 provided on the seal ring 19 is connected to the axially outer surface of the sliding contact plate 16. In sliding contact. And by this structure, it exists between the inner peripheral surface of the said outer cylinder 1 and the outer peripheral surface of the said roll shaft 2, and the internal space 25 which installed the said needle roller bearing 3 and the ball bearing 4 is interrupted | blocked from the outside. Yes. For this reason, foreign matter such as cooling water is prevented from entering the internal space 25 from the outside of the outer cylinder 1. That is, the backup roll is used by being incorporated in the tension leveler, but it is necessary to pour cooling water into the material to be corrected in order to suppress the temperature rise accompanying the correction of the material to be corrected. However, if this cooling water enters the backup roll, the lubricity of the bearings 3 and 4 may deteriorate, leading to a decrease in durability. For this reason, in the case of the above-described conventional structure, the tip edge of the seal lip 20 provided in the seal ring 19 is brought into sliding contact with the outer surface in the axial direction of the abutting member 17, thereby cooling water in the internal space 25. Etc. to prevent foreign objects from entering.

又、上記リング状部材７に設けた鍔部９の外周面は、軸方向外端（図６の右端）に向かう程直径が小さくなる方向に傾斜したテーパ面部２１としている。又、上記外筒１の端部内周面に、端部開口に向かう程拡径したテーパ面部２３を設けている。更に、上記鍔部９の下端部外周面に、軸方向全長に亙る水抜き溝２２を設けている。従って、上記外筒１の端部内周面と上記鍔部９の外周面との間を通じて、この鍔部９よりも上記軸受３、４側の内部空間内に冷却水等の水が進入した場合でも、この水を上記水抜き溝２２を通じて上記外筒１外に排出し易くできる。尚、図示の例の場合には、上記リング状部材７に設けた鍔部９の外周面を、軸方向外端に向かう程直径が小さくなる方向に傾斜したテーパ面部２１としているが、この外周面を単なる円筒面とする事も、従来から考えられている。又、図示の例の場合には、上記外筒１の端部内周面に端部開口に向かう程拡径したテーパ面部２３を設けているが、この端部内周面を単なる円筒面とする事も、従来から考えられている。   Further, the outer peripheral surface of the flange portion 9 provided on the ring-shaped member 7 is a tapered surface portion 21 that is inclined in a direction in which the diameter becomes smaller toward the outer end in the axial direction (the right end in FIG. 6). Further, a tapered surface portion 23 whose diameter is increased toward the end opening is provided on the inner peripheral surface of the end portion of the outer cylinder 1. Furthermore, a drain groove 22 is provided on the outer peripheral surface of the lower end of the flange 9 over the entire axial length. Accordingly, when water such as cooling water enters the inner space on the side of the bearings 3 and 4 from the flange 9 through the space between the inner peripheral surface of the end of the outer cylinder 1 and the outer periphery of the flange 9. However, this water can be easily discharged out of the outer cylinder 1 through the drain groove 22. In the case of the illustrated example, the outer peripheral surface of the flange portion 9 provided on the ring-shaped member 7 is a tapered surface portion 21 that is inclined in a direction in which the diameter decreases toward the outer end in the axial direction. It has been conventionally considered that the surface is a simple cylindrical surface. In the case of the illustrated example, a tapered surface portion 23 whose diameter is increased toward the end opening is provided on the inner peripheral surface of the outer cylinder 1. The inner peripheral surface of the end portion is simply a cylindrical surface. Has also been considered in the past.

上述の様に構成するロール支持装置であるバックアップロールは、ロール軸２の両端部を固定の支持部に固定した状態で、図示しない中間ロール、ワークロール等と組合せ、テンションレベラーとして使用する。この場合、上記外筒１の外周面には中間ロールを構成する外筒を押し付け、摩擦により、バックアップロールの外筒１を回転させる。尚、テンションレベラーの種類により中間ロールを省略し、ワークロールを構成する外筒の外周面にバックアップロールの外筒１を、直接押し付ける場合もある。又、バックアップロールの使用時には、被矯正材の温度上昇を抑えるべく、この被矯正材に冷却水を注ぐ。   A backup roll, which is a roll support device configured as described above, is used as a tension leveler in combination with an intermediate roll, a work roll, etc. (not shown) with both ends of the roll shaft 2 fixed to a fixed support. In this case, the outer cylinder constituting the intermediate roll is pressed against the outer peripheral surface of the outer cylinder 1, and the outer cylinder 1 of the backup roll is rotated by friction. Depending on the type of tension leveler, the intermediate roll may be omitted, and the outer cylinder 1 of the backup roll may be directly pressed against the outer peripheral surface of the outer cylinder constituting the work roll. Further, when the backup roll is used, cooling water is poured into the material to be corrected in order to suppress the temperature rise of the material to be corrected.

上述の図６に示した従来構造の場合には、前記内部空間２５内に冷却水等の異物が進入する事を阻止する為に、前記当て部材１７の軸方向外側面に、前記シールリング１９に設けたシールリップ２０の先端縁を摺接させている。例えば、このシールリップ２０の外周面付近に冷却水が溜まると、この冷却水は、上記シールリップ２０に直径を縮める方向の力を加える。但しこの場合には、この冷却水により、このシールリップ２０の先端縁が上記当て部材１７の軸方向外側面に強く押し付けられる為、この冷却水が上記内部空間２５内へ進入する事を阻止できる。この様に、上述の図６に示した従来構造の場合には、外部から冷却水等の異物が内部空間２５内に進入するのを防止する面からは有効であるが、この内部空間２５内で、前記針状ころ軸受３及び玉軸受４内に存在するグリース又はこのグリース中の基油が外部に漏出するのを防止する面からは、未だ改良の余地がある。   In the case of the conventional structure shown in FIG. 6 described above, the seal ring 19 is provided on the outer surface in the axial direction of the abutting member 17 in order to prevent foreign matter such as cooling water from entering the internal space 25. The front end edge of the seal lip 20 provided on is in sliding contact. For example, when cooling water accumulates in the vicinity of the outer peripheral surface of the seal lip 20, the cooling water applies a force in the direction of reducing the diameter to the seal lip 20. However, in this case, since the leading edge of the seal lip 20 is strongly pressed against the axially outer surface of the abutting member 17 by the cooling water, the cooling water can be prevented from entering the internal space 25. . As described above, in the case of the conventional structure shown in FIG. 6 described above, it is effective in terms of preventing foreign matters such as cooling water from entering the internal space 25 from the outside. Thus, there is still room for improvement in terms of preventing the grease existing in the needle roller bearing 3 and the ball bearing 4 or the base oil in the grease from leaking outside.

即ち、上記各軸受３、４内には潤滑の為のグリースが存在するが、バックアップロールの使用時には、例えば、玉軸受４を構成する保持器２６が、各玉２７、２７の転動面とこれら各玉２７、２７を保持するポケット２８、２８の内面との間に存在する隙間の存在等により、径方向に振動する。この保持器２６が径方向に振動すると、ポンピング作用が生じて、この保持器２６の内周面と内輪５の外周面との間からグリース又はこのグリース中の基油が絞り出される。そして、このグリース又は基油が軸方向外方に押し出され、上記当て部材１７を構成する摺接板１６の内周縁と上記リング状部材７の外周面との間部分を通じて、この摺接板１６の軸方向外側面とリング状部材７の外周面及び上記シールリップ２０の内周面とで囲まれた空間２４内に流れ込む。この結果、上記グリース又は基油は、上記軸受３、４側の内部空間２５内に戻る事なく上記空間２４内に溜まっていく。そして、この空間２４内に溜まったグリース又は基油が、上記シールリップ２０と摺接板１６との摺接部を押し広げ、この摺接部から外部に漏出する可能性がある。この様に、上述の図６に示した従来構造の場合には、上記内部空間２５内のグリース又は基油が外部に漏出するのを有効に防止する面からは、未だ改良の余地がある。   That is, grease for lubrication is present in each of the bearings 3 and 4, but when the backup roll is used, for example, the cage 26 constituting the ball bearing 4 is connected to the rolling surfaces of the balls 27 and 27. Due to the presence of gaps between the inner surfaces of the pockets 28 and 28 that hold the balls 27 and 27, they vibrate in the radial direction. When the cage 26 vibrates in the radial direction, a pumping action is generated, and grease or base oil in the grease is squeezed out between the inner circumferential surface of the cage 26 and the outer circumferential surface of the inner ring 5. Then, the grease or base oil is pushed outward in the axial direction, and the sliding contact plate 16 is passed through a portion between the inner peripheral edge of the sliding contact plate 16 constituting the contact member 17 and the outer peripheral surface of the ring-shaped member 7. Into the space 24 surrounded by the outer surface in the axial direction, the outer peripheral surface of the ring-shaped member 7 and the inner peripheral surface of the seal lip 20. As a result, the grease or base oil accumulates in the space 24 without returning to the internal space 25 on the bearings 3 and 4 side. Then, the grease or base oil accumulated in the space 24 may spread the sliding contact portion between the seal lip 20 and the sliding contact plate 16 and leak out from the sliding contact portion. Thus, in the case of the conventional structure shown in FIG. 6, there is still room for improvement in terms of effectively preventing the grease or base oil in the internal space 25 from leaking to the outside.

又、このグリース又は基油の漏出防止を図れる手段を採用する場合に、外筒１の回転方向によりこの漏出防止の効果に違いが生じるものを採用する事は、各部材の組み付け作業時に、使用時の外筒１の回転方向との関係を考慮しつつ組み付ける必要が生じ、組み付け作業が面倒になる為、好ましくない。
尚、本発明に関連する先行技術文献として、特許文献１〜３がある。 In addition, when adopting means that can prevent leakage of grease or base oil, it is necessary to use the one that causes a difference in the leakage prevention effect depending on the rotation direction of the outer cylinder 1 when assembling each member. It is not preferable because it is necessary to assemble while considering the relationship with the rotation direction of the outer cylinder 1 at the time, and the assembling work becomes troublesome.
Note that there are Patent Documents 1 to 3 as prior art documents related to the present invention.

実公平５−２０８９１号公報Japanese Utility Model Publication No. 5-20891 実開平５−２８５０４号公報Japanese Utility Model Publication No. 5-28504 実開平６−３２７３１号公報Japanese Utility Model Publication No. 6-32731

本発明のシールリング付ロール支持装置は、この様な事情に鑑みて、外筒の回転方向に拘らず、軸受内部に存在するグリース又はこのグリース中の基油の外部への漏出を有効に防止できる構造を実現すべく発明したものである。   In view of such circumstances, the roll support device with a seal ring of the present invention effectively prevents leakage of grease existing inside the bearing or the base oil in the grease to the outside regardless of the rotation direction of the outer cylinder. It was invented to realize a possible structure.

本発明のシールリング付ロール支持装置は、前述の図６に示した従来から考えられているシールリング付ロール支持装置と同様に、使用時に回転する外筒と、この外筒の内径側に設けられ使用時にも回転しないロール軸と、これら外筒の内周面とロール軸の外周面との間に設けられた軸受と、このロール軸の端部外周面に外嵌支持されて、この端部外周面に係止された止め輪と共に上記軸受の軸方向の変位を阻止するリング状部材と、このリング状部材に外嵌支持されたシールリングと、上記外筒の端部寄りに内嵌固定された第二のリング状部材とを備え、上記シールリングの一部をこの第二のリング状部材に摺接又は近接対向させる事により、上記外筒の内周面と上記ロール軸の外周面との間に存在し上記軸受を設置した内部空間を外部から遮断する。
そして、本発明のシールリング付ロール支持装置にあっては、上記第二のリング状部材の軸方向外側面と上記シールリングの軸方向内側面とを隙間を介して対向させると共に、これら軸方向外側面と軸方向内側面とのうちの一方の側面の円周方向複数個所に、この一方の側面から他方の側面に向けて突出した凸部を形成している。そして、これら各凸部を、円周方向両側に存在する面同士が径方向外方に向かう程互いに遠ざかる様に形成している。 The roll support device with a seal ring of the present invention is provided on the outer cylinder that rotates during use and the inner diameter side of this outer cylinder, similarly to the conventional roll support device with a seal ring shown in FIG. The roll shaft that does not rotate during use, the bearing provided between the inner peripheral surface of these outer cylinders and the outer peripheral surface of the roll shaft, and the outer peripheral surface of the end portion of the roll shaft are externally fitted and supported. A ring-shaped member that prevents axial displacement of the bearing together with a retaining ring that is locked to the outer peripheral surface of the part, a seal ring that is externally supported by the ring-shaped member, and an internal fit near the end of the outer cylinder A second ring-shaped member that is fixed, and a part of the seal ring is in sliding contact with or in close proximity to the second ring-shaped member, whereby the outer peripheral surface of the outer cylinder and the outer periphery of the roll shaft Between the surface and the internal space where the bearing is installed It is cut off.
In the roll support device with a seal ring of the present invention, the axially outer side surface of the second ring-shaped member and the axially inner side surface of the seal ring are opposed to each other with a gap therebetween, and these axial directions Protrusions projecting from one side surface to the other side surface are formed at a plurality of locations in the circumferential direction on one side surface of the outer side surface and the inner side surface in the axial direction. And each of these convex parts is formed so that the surfaces existing on both sides in the circumferential direction move away from each other as they go radially outward.

上述の様に構成する本発明のシールリング付ロール支持装置の場合、シールリングの軸方向内側面と第二のリング状部材の軸方向外側面とのうちの一方の側面に複数の凸部を形成しており、しかも、これら各凸部を、円周方向両側に存在する面同士が径方向外方に向かう程互いに遠ざかる様に形成している。この為、上記シールリングと第二のリング状部材とが相対回転した場合に、上記シールリングの軸方向内側面と第二のリング状部材の軸方向外側面との間部分に達したグリース又は基油が、上記各凸部の存在により径方向内方に押し戻される。この為、このグリース又は基油が、軸受側に還流して、上記シールリングと第二のリング状部材との間部分を通じて外部に漏出する事を防止できる。又、上記各凸部を、円周方向両側に存在する面同士が径方向外方に向かう程互いに遠ざかる様に形成している為、外筒の回転方向に拘らず、上記各凸部部分に達したグリース又は基油を上記軸受側に還流させる事ができる。この結果、本発明の場合には、外筒の回転方向に拘らず、軸受内部に存在するグリース又は基油が外筒外に漏出する事を、有効に防止できる。そしてこの様にグリース又は基油の漏出を有効に防止できれば、上記軸受内のグリースの量を十分に確保できると共に、このグリースを軸受の潤滑に有効利用でき、シールリング付ロール支持装置の耐久性の向上を図れる。   In the case of the roll support device with a seal ring of the present invention configured as described above, a plurality of convex portions are provided on one side surface of the inner side surface in the axial direction of the seal ring and the outer side surface in the axial direction of the second ring-shaped member. In addition, these convex portions are formed such that the surfaces existing on both sides in the circumferential direction move away from each other as they go radially outward. For this reason, when the seal ring and the second ring-shaped member rotate relative to each other, the grease that reaches the portion between the axial inner surface of the seal ring and the axial outer surface of the second ring-shaped member or The base oil is pushed back inward in the radial direction by the presence of each of the convex portions. For this reason, it is possible to prevent the grease or the base oil from flowing back to the bearing side and leaking outside through the portion between the seal ring and the second ring-shaped member. In addition, since the respective convex portions are formed so that the surfaces existing on both sides in the circumferential direction move away from each other toward the outer side in the radial direction, the convex portions are formed on the respective convex portion portions regardless of the rotation direction of the outer cylinder. The reached grease or base oil can be returned to the bearing side. As a result, in the case of the present invention, it is possible to effectively prevent the grease or base oil existing inside the bearing from leaking out of the outer cylinder regardless of the rotation direction of the outer cylinder. If leakage of grease or base oil can be effectively prevented in this way, the amount of grease in the bearing can be secured sufficiently, and this grease can be effectively used for lubrication of the bearing. Can be improved.

本発明を実施する場合に好ましくは、上記外筒の両端部のうち、少なくとも一端部内周面に、一端開口に向かう程直径が大きくなる方向に傾斜したテーパ面部を設けている。
この好ましい構成によれば、使用時に冷却水等の異物が上記外筒の両端部から内側に進入した場合でも、この外筒の回転に伴う遠心力の作用により上記異物を外筒外に有効に排出し易くできる。この為、上記外筒の内周面とロール軸の外周面との間に存在する軸受を設置した内部空間内に上記異物が進入する事を有効に防止でき、耐久性をより向上させる事ができる。 When implementing this invention, Preferably, the taper surface part which inclined in the direction in which a diameter becomes large toward one end opening is provided in the inner peripheral surface of one end part among the both ends of the said outer cylinder.
According to this preferred configuration, even when foreign matter such as cooling water enters inward from both ends of the outer cylinder at the time of use, the foreign substance is effectively removed outside the outer cylinder by the action of centrifugal force accompanying the rotation of the outer cylinder. Easy to discharge. For this reason, it is possible to effectively prevent the foreign matter from entering the internal space in which the bearing existing between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the roll shaft is installed, and the durability can be further improved. it can.

図１〜４は、本発明の実施例を示している。尚、本実施例の特徴は、外筒１の回転方向に拘らず、針状ころ軸受３及び玉軸受４の内部に存在するグリース又はこのグリース中の基油の外部への漏出を有効に防止すべく、ロール軸２の両端部にリング状部材７ａを介して外嵌支持したシールリング１９ａと、外筒１の両端寄り部分に内嵌固定した第二のリング状部材である、当て部材１７ａとの構造を工夫した点にある。本実施例に於いて、その他の構造は、前述の図６に示した従来から考えられている構造とほぼ同様である為、重複する説明を省略若しくは簡略にし、以下、本実施例の特徴部分、並びに前述の図６に示した従来構造と異なる部分を中心に説明する。   1 to 4 show an embodiment of the present invention. The feature of this embodiment is that it effectively prevents the grease existing inside the needle roller bearing 3 and the ball bearing 4 or the base oil in the grease from leaking to the outside regardless of the rotation direction of the outer cylinder 1. In particular, a seal ring 19a that is externally fitted and supported at both ends of the roll shaft 2 via ring-shaped members 7a, and a second ring-shaped member that is internally fitted and fixed to portions near both ends of the outer cylinder 1, are abutting members 17a. It is in the point which devised the structure. In the present embodiment, the other structure is substantially the same as the conventional structure shown in FIG. 6 described above. Therefore, the overlapping description is omitted or simplified. In addition, the description will be focused on the parts different from the conventional structure shown in FIG.

本実施例の場合、上記ロール軸２の両端寄り部分に、その外端部（図１の右端部）に外向フランジ状の鍔部９ａを設けたリング状部材７ａを外嵌支持している。又、この鍔部９ａの外周面に、軸方向外端（図１の右端）に向かう程直径が大きくなる方向に傾斜したテーパ面部２１ａを設けている。そして、このテーパ面部２１ａを、上記外筒１の両端寄り部分内周面に形成したテーパ面部２３に、部分円すい筒状の微小隙間を介して対向させている。又、上記テーパ面部２１ａの下端部に、内部に入り込んだ冷却水等の水を排出する為の水抜き溝２２を形成している。   In the case of the present embodiment, a ring-shaped member 7a having an outward flange-shaped flange portion 9a at the outer end portion (the right end portion in FIG. 1) of the roll shaft 2 is externally supported. Further, a tapered surface portion 21a is provided on the outer peripheral surface of the flange portion 9a. The tapered surface portion 21a is inclined in a direction in which the diameter increases toward the outer end in the axial direction (the right end in FIG. 1). And this taper surface part 21a is made to oppose the taper surface part 23 formed in the partial inner peripheral surface near the both ends of the said outer cylinder 1 through the partial conical cylindrical gap. Further, a drain groove 22 for discharging water such as cooling water that has entered the inside is formed at the lower end of the tapered surface portion 21a.

特に、本実施例の場合には、上記リング状部材７ａの本体部８にシールリング１９ａを外嵌固定している。このシールリング１９ａは、全体を合成ゴムの如きエラストマー等の弾性材により造っており、円筒状の本体部２９と、この本体部２９の軸方向内側面（図１、２の左側面）の外径寄り部分に軸方向に対し傾斜する方向に突出形成した傾斜筒部３０とを備える。この傾斜筒部３０は、軸方向内方（図１、２の左方）に向かう程直径が大きくなる方向に傾斜した部分円すい筒状である。又、この傾斜筒部３０の軸方向内端に円輪部３１を連結すると共に、この円輪部３１の軸方向外側面の外周縁部に筒状の突部３２を、軸方向に突出形成している。上記本体部２９と傾斜筒部３０の基端部とには、補強板３４を包埋支持している。   In particular, in the case of the present embodiment, a seal ring 19a is externally fixed to the main body portion 8 of the ring-shaped member 7a. The seal ring 19a is entirely made of an elastic material such as an elastomer such as synthetic rubber, and has a cylindrical main body 29 and an outer side of the main body 29 in the axial direction (the left side in FIGS. 1 and 2). An inclined cylindrical portion 30 is provided at the near-diameter portion so as to protrude in a direction inclined with respect to the axial direction. The inclined cylindrical portion 30 has a partially conical cylindrical shape that is inclined in a direction in which the diameter increases toward the inner side in the axial direction (leftward in FIGS. 1 and 2). In addition, the annular ring portion 31 is connected to the inner end in the axial direction of the inclined cylindrical portion 30, and a cylindrical protrusion 32 is formed to protrude in the axial direction on the outer peripheral edge portion of the outer circumferential surface of the annular ring portion 31. is doing. A reinforcing plate 34 is embedded and supported in the main body portion 29 and the base end portion of the inclined cylindrical portion 30.

一方、前記外筒１の両端寄り部分内周面に設けた大径段部３３の内周面で、軸方向に関して前記玉軸受４及びシールリング１９ａの間に位置する部分に第二のリング状部材である、当て部材１７ａを固定している。この当て部材１７ａは、ゴム製の筒部１５と、この筒部１５の内周側に結合固定した摺接板１６ａとから成る。この摺接板１６ａは、金属板により、断面Ｌ字形で全体を円環状に造っており、この摺接板１６ａを構成する筒部３５の軸方向外端部に、軸方向外端に向かう程直径が小さくなる方向に傾斜した、部分円すい筒状の傾斜筒部３６を形成している。   On the other hand, on the inner peripheral surface of the large-diameter step portion 33 provided on the inner peripheral surface near the both ends of the outer cylinder 1, a second ring shape is formed in a portion located between the ball bearing 4 and the seal ring 19a in the axial direction. The abutting member 17a, which is a member, is fixed. The abutting member 17 a includes a rubber cylinder portion 15 and a sliding contact plate 16 a that is coupled and fixed to the inner peripheral side of the cylinder portion 15. The slidable contact plate 16a is made of a metal plate and is formed in an annular shape with an L-shaped cross section, and toward the axially outer end of the cylindrical portion 35 constituting the slidable contact plate 16a. An inclined cylindrical portion 36 having a partial conical cylindrical shape that is inclined in the direction of decreasing the diameter is formed.

この様な当て部材１７ａは、上記大径段部３３の軸方向内端に存在する段差面３８に外径寄り部分側面を突き当てた状態で、上記大径段部３３に圧入により内嵌固定している。この状態で、上記円輪部３７の内周縁を、前記リング状部材７ａの軸方向内端寄り部分外周面に、微小隙間を介して近接対向させている。又、上記円輪部３７の軸方向外側面を、上記シールリング１９ａを構成する円輪部３１の軸方向内側面に、隙間４１を介して対向させている。更に、上記摺接板１６ａに形成した傾斜筒部３６の内周面に、上記シールリング１９ａの外周縁部に設けた突部３２の先端縁を、全周に亙り摺接させている。この構成により、上記外筒１の内周面とロール軸２の外周面との間に存在し前記各針状ころ軸受３及び上記各玉軸受４を設置した内部空間２５が、外部から遮断される。   Such a contact member 17a is fitted and fixed to the large-diameter step portion 33 by press-fitting in a state where the side surface near the outer diameter is abutted against the step surface 38 existing at the inner end in the axial direction of the large-diameter step portion 33. is doing. In this state, the inner peripheral edge of the annular ring portion 37 is made to face and oppose the outer peripheral surface of the ring-shaped member 7a near the inner end in the axial direction with a small gap therebetween. Further, the outer side surface in the axial direction of the annular portion 37 is opposed to the inner side surface in the axial direction of the annular portion 31 constituting the seal ring 19a through a gap 41. Further, the tip edge of the protrusion 32 provided on the outer peripheral edge of the seal ring 19a is slidably contacted with the inner peripheral surface of the inclined cylindrical portion 36 formed on the sliding contact plate 16a. With this configuration, an internal space 25 that is present between the inner peripheral surface of the outer cylinder 1 and the outer peripheral surface of the roll shaft 2 and in which the needle roller bearings 3 and the ball bearings 4 are installed is blocked from the outside. The

更に、本実施例の場合には、上記摺接板１６ａの円輪部３７の軸方向外側面と隙間４１を介して対向する、上記シールリング１９ａの円輪部３１の軸方向内側面の円周方向等間隔複数個所に、それぞれが軸方向内側に向けて突出する凸部３９、３９を形成している。これら各凸部３９、３９は、図３に斜格子で示す様に、それぞれの径方向外端の辺の長さが径方向内端の辺の長さよりも長い、略台形に形成している。従って、これら各凸部３９、３９の円周方向両側に存在する傾斜側面４０ａ、４０ｂは、径方向外方に向かう程互いに遠ざかる方向に傾斜している。   Further, in the case of the present embodiment, a circle on the inner side surface in the axial direction of the annular portion 31 of the seal ring 19a that faces the outer side surface in the axial direction of the annular portion 37 of the sliding contact plate 16a via the gap 41. Convex portions 39, 39 each projecting inward in the axial direction are formed at a plurality of circumferentially equal intervals. Each of these convex portions 39, 39 is formed in a substantially trapezoidal shape in which the length of the side at the outer end in the radial direction is longer than the length of the side at the inner end in the radial direction, as shown by an oblique grid in FIG. . Accordingly, the inclined side surfaces 40a, 40b existing on both sides in the circumferential direction of the respective convex portions 39, 39 are inclined in a direction away from each other toward the outer side in the radial direction.

上述の様に構成する本実施例の場合には、シールリング１９ａの円輪部３１の軸方向内側面に軸方向内方に向けて突出する複数の凸部３９、３９を形成しており、しかも、これら各凸部３９、３９を、円周方向両側に存在する傾斜側面４０ａ、４０ｂ同士が径方向外方に向かう程互いに遠ざかる様に形成している。この為、上記シールリング１９ａと、このシールリング１９ａと隙間４１を介して対向した当て部材１７ａとが相対回転した場合に、このシールリング１９ａの円輪部３１の軸方向内側面と、上記当て部材１７ａを構成する摺接板１６ａの軸方向外側面との隙間４１部分に達したグリース又は基油が、上記各凸部３９、３９の存在により径方向内方に押し戻される。この為、このグリース又は基油が、軸受３、４側に還流して、上記シールリング１９ａと当て部材１７ａとの間部分を通じて外部に漏出する事を防止できる。   In the case of the present embodiment configured as described above, a plurality of convex portions 39, 39 projecting inward in the axial direction are formed on the inner surface in the axial direction of the annular portion 31 of the seal ring 19a. Moreover, the convex portions 39, 39 are formed so that the inclined side surfaces 40a, 40b existing on both sides in the circumferential direction are away from each other as they go outward in the radial direction. For this reason, when the seal ring 19a and the contact member 17a opposed to the seal ring 19a through the gap 41 are relatively rotated, the axial inner surface of the annular ring portion 31 of the seal ring 19a and the contact Grease or base oil that has reached the gap 41 with the axially outer surface of the sliding contact plate 16a constituting the member 17a is pushed back radially inward due to the presence of the convex portions 39, 39. For this reason, it is possible to prevent the grease or base oil from flowing back to the bearings 3 and 4 and leaking to the outside through the portion between the seal ring 19a and the contact member 17a.

具体的に説明すると、例えば、本実施例のシールリング付ロール支持装置である、バックアップロールの使用時に外筒１が回転すると、上記各玉軸受２の複数の玉２７が、保持器２６と共に回転する。この際、この保持器２６が、各玉２７の転動面とこれら各玉２７を保持するポケット２８との間の隙間の存在等により、径方向に振動する。そして上記保持器２６が径方向に振動すると、この振動によるポンピング作用により、上記玉軸受４内のグリース又はこのグリース中の基油の一部が、内輪５の端部外周面と保持器２６の端部内周面との間に絞り出される。この絞り出されたグリース又は基油の一部は、図１、２に矢印イで示す様に、玉軸受４から軸方向外側に排出された後、リング状部材７ａの外周面と摺接板１６ａの内周縁との間部分を通じて、この摺接板１６ａの軸方向外側面とシールリング１９ａの軸方向内側面及びリング状部材７ａの外周面とで囲まれた空間４２内に流れ込む。そして、この空間４２内に流れ込んだグリース又は基油が、外径側に送られて、図１、２に矢印ロで示す様に、上記摺接板１６ａを構成する円輪部３７の軸方向外側面と、上記シールリング１９ａの円輪部３１の軸方向内側面との間の隙間４１部分に入り込む。   More specifically, for example, when the outer cylinder 1 rotates during use of the backup roll, which is the roll support device with a seal ring of the present embodiment, the plurality of balls 27 of the respective ball bearings 2 rotate together with the cage 26. To do. At this time, the cage 26 vibrates in the radial direction due to the presence of a gap between the rolling surfaces of the balls 27 and the pockets 28 holding the balls 27. When the cage 26 vibrates in the radial direction, the grease in the ball bearing 4 or a part of the base oil in the grease is caused by the pumping action caused by the vibration, so that the outer peripheral surface of the end of the inner ring 5 and the cage 26 It is squeezed between the end inner peripheral surface. A part of the squeezed grease or base oil is discharged from the ball bearing 4 to the outside in the axial direction as shown by arrows A in FIGS. It flows into the space 42 surrounded by the axially outer side surface of the sliding contact plate 16a, the axially inner side surface of the seal ring 19a, and the outer peripheral surface of the ring-shaped member 7a through the portion between the inner peripheral edge of 16a. Then, the grease or base oil that has flowed into the space 42 is sent to the outer diameter side, and as shown by arrows B in FIGS. 1 and 2, the axial direction of the annular portion 37 that constitutes the sliding contact plate 16a. The gap 41 between the outer side surface and the inner side surface in the axial direction of the annular portion 31 of the seal ring 19a enters.

この隙間４１部分に入り込んだグリース又は基油の一部は、上記シールリング１９ａの円輪部３１の軸方向内側面で、円周方向に隣り合う凸部３９、３９同士の間に存在する凹部４３、４３内に入り込む。上記外筒１の回転に伴い、この外筒１に固定した当て部材１７ａは、図３に実線矢印αで示す方向に回転する。この際、上記シールリング１９ａは回転しないが、上記当て部材１７ａとシールリング１９ａとの相対回転により、上記凹部４３、４３内に入り込んだグリース又は基油が、上記当て部材１７ａの回転と同方向の、図３の実線矢印α方向に移動する（連れ回る）。この結果、上記各凹部４３、４３内に入り込んだグリース又は基油が、前記各凸部３９、３９の傾斜側面４０ａ、４０ｂのうち、上記当て部材１７ａの回転方向後側の傾斜側面４０ａに、実線矢印α方向の大きな速度Ｓ（図４）で衝突する。この速度Ｓは、この傾斜側面４０ａと平行な速度成分Ｈ（図４）を有する。この為、上記グリース又は基油は、この傾斜側面４０ａに沿って、図３、４に実線矢印ハで示す様に、径方向内方に送り出される。   A portion of the grease or base oil that has entered the gap 41 is a recess that exists between the protrusions 39 adjacent to each other in the circumferential direction on the inner surface in the axial direction of the annular portion 31 of the seal ring 19a. 43, 43. As the outer cylinder 1 rotates, the contact member 17a fixed to the outer cylinder 1 rotates in the direction indicated by the solid line arrow α in FIG. At this time, the seal ring 19a does not rotate, but the grease or base oil that has entered the recesses 43 and 43 due to the relative rotation between the contact member 17a and the seal ring 19a is in the same direction as the rotation of the contact member 17a. 3 moves in the direction of the solid line arrow α in FIG. As a result, the grease or base oil that has entered the concave portions 43, 43 is formed on the inclined side surface 40a on the rear side in the rotation direction of the abutting member 17a among the inclined side surfaces 40a, 40b of the convex portions 39, 39. Colliding at a large speed S (FIG. 4) in the direction of the solid arrow α. This speed S has a speed component H (FIG. 4) parallel to the inclined side surface 40a. For this reason, the grease or the base oil is sent inward in the radial direction along the inclined side surface 40a as shown by solid line arrows C in FIGS.

又、前記隙間４１部分に入り込んだグリース又は基油のうち、上記凹部４３、４３内に入り込まず、上記各凸部３９、３９と上記円輪部３７の軸方向外側面との間に流れ込んだグリース又は基油も、漸次これら各凸部３９、３９にこすり取られて、上記各凹部４３、４３内に取り込まれる。そして、このグリース又は基油も上記傾斜側面４０ａに沿って、図３、４に実線矢印ハで示す様に、径方向内方に送り出される。   Of the grease or base oil that has entered the gap 41, the grease or base oil does not enter the recesses 43 and 43, but flows between the projections 39 and 39 and the outer circumferential surface of the ring portion 37. Grease or base oil is also gradually scraped off by these convex portions 39 and 39 and taken into the concave portions 43 and 43. This grease or base oil is also sent inward in the radial direction along the inclined side surface 40a as shown by solid line arrows C in FIGS.

上述の様に作用する結果、上記隙間４１部分に入り込んだグリース又は基油は、径方向内方に送り出され、前記軸受３、４が存在する内部空間２５内に還流される。言い換えれば、本実施例の場合には、上記シールリング１９ａの軸方向内側面に形成した各凸部３９、３９同士の間に存在する凹部４３、４３が、グリース溜めの役割を果たし、上記各凸部３９、３９がこのグリースを吸い上げるポンプの役割を果たす。尚、前記外筒１が上述した場合と逆方向である、図３の点線矢印βで示す方向に回転した場合には、上記各凹部４３、４３内に入り込んだグリース又は基油が、上記各凸部３９、３９の傾斜側面のうちの傾斜側面４０ｂに沿って、同図に点線矢印ニで示す様に、径方向内方に送り出され、上述した場合と同様に、上記内部空間２５内に還流される。   As a result of the above-described action, the grease or base oil that has entered the gap 41 is sent radially inward and returned to the internal space 25 where the bearings 3 and 4 exist. In other words, in the case of the present embodiment, the concave portions 43, 43 existing between the convex portions 39, 39 formed on the inner surface in the axial direction of the seal ring 19a serve as a grease reservoir, The convex portions 39, 39 serve as a pump that sucks up this grease. In addition, when the outer cylinder 1 rotates in the direction indicated by the dotted arrow β in FIG. 3, which is the opposite direction to that described above, the grease or base oil that has entered the recesses 43, 43 is Along the inclined side surface 40b of the inclined side surfaces of the convex portions 39, 39, as shown by a dotted arrow D in the figure, it is sent inward in the radial direction, and in the internal space 25 as described above, Refluxed.

この様に本実施例の場合には、上記各凸部３９、３９の形状を略台形とし、円周方向両側に存在する面を、径方向外方に向かう程互いに遠ざかる方向に径方向に対し傾斜した傾斜側面４０ａ、４０ｂとしている為、上記外筒１の回転方向に拘らず、上記隙間４１部分に達したグリース又は基油を、上記軸受３、４側の内部空間２５に還流させる事ができる。この結果、上記外筒１の回転方向に拘らず、これら軸受３、４の内部に存在するグリース又は基油が、シールリング１９ａと当て部材１７ａとの摺接部を通じて外筒１外に漏出する事を、有効に防止できる。そしてこの様にグリース又は基油の漏出を有効に防止できれば、上記軸受３、４内のグリースの量を十分に確保できると共に、このグリースを軸受３、４の潤滑に有効利用でき、バックアップロールの耐久性の向上を図れる。この為、本実施例の様に、玉軸受４として、両端部にシールリングを設けない、所謂オープンタイプの構造を使用した場合でも、耐久性を十分に確保し易くでき、低コスト化に寄与できる。但し、このシールリングの採用によるコスト上昇を許容できる場合に、上記玉軸受４として、両端部のうちの少なくとも一端部にシールリングを設けた構造を採用できる事は勿論である。   In this way, in the case of the present embodiment, the shape of each of the convex portions 39, 39 is substantially trapezoidal, and the surfaces existing on both sides in the circumferential direction are away from each other toward the radial direction with respect to the radial direction. Since the inclined side surfaces 40a and 40b are inclined, the grease or base oil that has reached the gap 41 portion can be returned to the inner space 25 on the bearings 3 and 4 side regardless of the rotation direction of the outer cylinder 1. it can. As a result, regardless of the rotation direction of the outer cylinder 1, the grease or base oil present in the bearings 3 and 4 leaks out of the outer cylinder 1 through the sliding contact portion between the seal ring 19a and the contact member 17a. You can effectively prevent things. If leakage of grease or base oil can be effectively prevented in this way, the amount of grease in the bearings 3 and 4 can be sufficiently secured, and this grease can be effectively used for lubrication of the bearings 3 and 4, and the backup roll Durability can be improved. For this reason, even when a so-called open type structure in which no seal ring is provided at both ends is used as the ball bearing 4 as in this embodiment, it is possible to sufficiently ensure durability and contribute to cost reduction. it can. However, when the cost increase due to the use of this seal ring can be tolerated, it is needless to say that the ball bearing 4 can have a structure in which a seal ring is provided at at least one end of both ends.

又、本実施例の場合には、前記外筒１の両端部内周面に、端部開口に向かう程直径が大きくなる方向に傾斜したテーパ面部２３を設けている。この為、バックアップロールの使用時に冷却水等の異物が上記外筒１の両端部から内側に進入した場合でも、この外筒１の回転に伴う遠心力の作用により上記異物を外筒１外に有効に排出し易くできる。この為、上記外筒１の内周面とロール軸２の外周面との間に存在する軸受３、４を設置した内部空間２５内に上記異物が進入する事を有効に防止でき、耐久性をより向上させる事ができる。   Further, in the case of the present embodiment, tapered surface portions 23 that are inclined in a direction in which the diameter increases toward the end opening are provided on the inner peripheral surfaces of both ends of the outer cylinder 1. For this reason, even when foreign matter such as cooling water enters inward from both ends of the outer cylinder 1 when the backup roll is used, the foreign substance is moved out of the outer cylinder 1 by the action of centrifugal force accompanying the rotation of the outer cylinder 1. It can be easily discharged effectively. Therefore, it is possible to effectively prevent the foreign matter from entering the internal space 25 in which the bearings 3 and 4 existing between the inner peripheral surface of the outer cylinder 1 and the outer peripheral surface of the roll shaft 2 are installed. Can be further improved.

尚、本実施例の場合には、リング状部材７ａに外嵌固定したシールリング１９ａの各凸部３９、３９を、このシールリング１９ａの他の部分と同様の、合成ゴムの如きエラストマー等の弾性材製としている。但し、本発明は、各凸部の材料として、鉄、鋼等の金属板、合成樹脂等を使用する事もでき、材料を特に限定するものではない。   In the case of the present embodiment, the convex portions 39, 39 of the seal ring 19a externally fitted and fixed to the ring-shaped member 7a are made similar to other portions of the seal ring 19a, such as an elastomer such as a synthetic rubber. Made of elastic material. However, in the present invention, a metal plate such as iron or steel, a synthetic resin, or the like can be used as the material of each convex portion, and the material is not particularly limited.

又、上述した実施例１の構造の場合、シールリング１９ａの軸方向内側面に凸部３９、３９を形成しているが、各凸部３９、３９は、この軸方向内側面と対向する、当て部材１７ａの軸方向外側面に形成する事もできる。この様に構成した場合、上記シールリング１９ａと当て部材１７ａとの相対回転により、この当て部材１７ａの軸方向外側面で、円周方向に隣り合う各凸部３９、３９同士の間部分に存在する凹部内に入り込んだグリース又は基油が、上記当て部材１７ａの回転方向と逆方向に、各凸部３９、３９の傾斜側面に衝突する。そして、これら傾斜側面に沿って径方向内方に送り出される。この結果、上記各凸部３９、３９を当て部材１７ａの側に形成した場合も、この当て部材１７ａの軸方向外側面と上記シールリング１９ａの軸方向内側面との間の隙間４１部分に入り込んだグリース又は基油を、軸受３、４側に還流させる事ができる。   Further, in the case of the structure of the first embodiment described above, the convex portions 39, 39 are formed on the inner side surface in the axial direction of the seal ring 19a, but each convex portion 39, 39 faces the inner side surface in the axial direction. It can also be formed on the outer surface in the axial direction of the abutting member 17a. When configured in this manner, due to the relative rotation of the seal ring 19a and the abutting member 17a, the axially outer surface of the abutting member 17a exists between the convex portions 39 adjacent to each other in the circumferential direction. The grease or the base oil that has entered the concave portion collides with the inclined side surfaces of the convex portions 39 and 39 in the direction opposite to the rotation direction of the abutting member 17a. And it sends out radially inward along these inclined side surfaces. As a result, even when the convex portions 39 are formed on the abutting member 17a side, they enter the gap 41 portion between the axially outer side surface of the abutting member 17a and the axially inner side surface of the seal ring 19a. Grease or base oil can be recirculated to the bearings 3 and 4 side.

又、上記各凸部３９、３９の形状は、上述した形状以外にも、図５（Ａ）（Ｂ）に示す様な形状も採用可能である。このうちの図５（Ａ）に示した構造の場合には、各凸部３９ａ、３９ａの形状を略三角形としている。この場合も、円周方向両側に存在する面を、傾斜側面４０ａ、４０ｂとし、これら傾斜側面４０ａ、４０ｂを径方向外方に向かう程互いに遠ざかる方向に傾斜させている。これに対して図５（Ｂ）に示した構造の場合には、各凸部３９ｂ、３９ｂの形状を略半円とし、円周方向両側に存在する面を曲面としている。そして、これら各凸部３９ｂ、３９ｂの円周方向両側に存在する曲面を、径方向外方に向かう程互いに遠ざかる様に形成している。この様に、各凸部３９ｂ、３９ｂの円周方向両側に存在する面を曲面とした場合も、上述の実施例１、及び、図５（Ａ）の凸部３９、３９ａの場合と同様に作用して、グリース又は基油を径方向内方に送り出す事ができる。   In addition to the above-described shapes, the shapes of the convex portions 39, 39 can also be the shapes shown in FIGS. 5 (A) and 5 (B). Of these, in the case of the structure shown in FIG. 5A, the shape of each convex portion 39a, 39a is substantially triangular. Also in this case, the surfaces existing on both sides in the circumferential direction are inclined side surfaces 40a and 40b, and these inclined side surfaces 40a and 40b are inclined in directions away from each other as they go outward in the radial direction. On the other hand, in the case of the structure shown in FIG. 5B, the shape of each convex portion 39b, 39b is a substantially semicircle, and the surfaces existing on both sides in the circumferential direction are curved surfaces. And the curved surface which exists in the circumferential direction both sides of these convex parts 39b and 39b is formed so that it may mutually distance, so that it goes to radial direction outward. In this way, even when the surfaces existing on both sides in the circumferential direction of the convex portions 39b and 39b are curved surfaces, similarly to the case of the above-described first embodiment and the convex portions 39 and 39a in FIG. By acting, grease or base oil can be sent out radially inward.

本発明の実施例１を示す部分断面図。The fragmentary sectional view which shows Example 1 of this invention. 図１のＡ部拡大断面図。The A section expanded sectional view of FIG. 図２のシールリングの円輪部を左方から見た部分拡大図。The elements on larger scale which looked at the annular part of the seal ring of FIG. 2 from the left. 図３から１個の凸部のみを取り出し、傾斜側面に沿ってグリース又は基油が流れる様子を説明する為の模式図。The schematic diagram for taking out only one convex part from FIG. 3, and explaining a mode that grease or base oil flows along an inclined side surface. シールリングの軸方向内側面に形成する凸部の形状の別の２例を示す部分斜視図。The partial perspective view which shows two other examples of the shape of the convex part formed in the axial direction inner surface of a seal ring. バックアップロールの従来構造の１例を示す部分断面図。The fragmentary sectional view which shows one example of the conventional structure of a backup roll.

符号の説明Explanation of symbols

１ 外筒
２ ロール軸
３ 針状ころ軸受
４ 玉軸受
５ 内輪
６ 段差面
７、７ａ リング状部材
８ 本体部
９、９ａ 鍔部
１０ 止め輪
１１ 係止溝
１２ Ｏリング
１３ 外輪
１４ 外輪間座
１５ 筒部
１６、１６ａ 摺接板
１７、１７ａ 当て部材
１８ 段差面
１９、１９ａ シールリング
２０ シールリップ
２１、２１ａ テーパ面部
２２ 水抜き溝
２３ テーパ面部
２４ 空間
２５ 内部空間
２６ 保持器
２７ 玉
２８ ポケット
２９ 本体部
３０ 傾斜筒部
３１ 円輪部
３２ 突部
３３ 大径段部
３４ 補強板
３５ 筒部
３６ 傾斜筒部
３７ 円輪部
３８ 段差面
３９、３９ａ、３９ｂ 凸部
４０ａ、４０ｂ 傾斜側面
４１ 隙間
４２ 空間
４３ 凹部
DESCRIPTION OF SYMBOLS 1 Outer cylinder 2 Roll shaft 3 Needle roller bearing 4 Ball bearing 5 Inner ring 6 Step surface 7, 7a Ring-shaped member 8 Main body part 9, 9a Hook part 10 Retaining ring 11 Locking groove 12 O-ring 13 Outer ring 14 Outer ring spacer 15 Tube portion 16, 16a Sliding contact plate 17, 17a Contact member 18 Step surface 19, 19a Seal ring 20 Seal lip 21, 21a Tapered surface portion 22 Drain groove 23 Tapered surface portion 24 Space 25 Internal space 26 Cage 27 Ball 28 Pocket 29 Main body Part 30 Inclined cylindrical part 31 Annular part 32 Protruding part 33 Large diameter step part 34 Reinforcement plate 35 Cylindrical part 36 Inclined cylindrical part 37 Circular part 38 Step surface 39, 39a, 39b Convex part 40a, 40b Inclined side face 41 Gap 42 Space 43 recess

Claims (1)

使用時に回転する外筒と、この外筒の内径側に設けられ使用時にも回転しないロール軸と、これら外筒の内周面とロール軸の外周面との間に設けられた軸受と、このロール軸の端部外周面に外嵌支持されて、この端部外周面に係止された止め輪と共に上記軸受の軸方向の変位を阻止するリング状部材と、このリング状部材に外嵌支持されたシールリングと、上記外筒の端部寄りに内嵌固定された第二のリング状部材とを備え、上記シールリングの一部をこの第二のリング状部材に摺接又は近接対向させる事により、上記外筒の内周面と上記ロール軸の外周面との間に存在し上記軸受を設置した内部空間を外部から遮断するシールリング付ロール支持装置であって、
上記第二のリング状部材の軸方向外側面と上記シールリングの軸方向内側面とを隙間を介して対向させると共に、これら軸方向外側面と軸方向内側面とのうちの一方の側面の円周方向複数個所に、この一方の側面から他方の側面に向けて突出した凸部を形成しており、これら各凸部は、円周方向両側に存在する面同士が径方向外方に向かう程互いに遠ざかる様に形成されているシールリング付ロール支持装置。
An outer cylinder that rotates at the time of use, a roll shaft that is provided on the inner diameter side of the outer cylinder and does not rotate at the time of use, a bearing provided between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the roll shaft, A ring-shaped member that is fitted and supported on the outer peripheral surface of the end portion of the roll shaft, and prevents the displacement of the bearing in the axial direction together with a retaining ring that is locked to the outer peripheral surface of the end portion. A seal ring and a second ring member fitted and fixed near the end of the outer cylinder, and a part of the seal ring is slidably contacted or closely opposed to the second ring member. By this, it is a roll support device with a seal ring that is present between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the roll shaft and blocks the internal space where the bearing is installed from the outside,
The outer circumferential surface of the second ring-shaped member and the inner axial surface of the seal ring are opposed to each other through a gap, and a circle on one of the axial outer surface and the axial inner surface is provided. Protrusions that protrude from one side surface to the other side surface are formed at a plurality of locations in the circumferential direction, and each of the convex portions is such that the surfaces existing on both sides in the circumferential direction are directed radially outward. A roll support device with a seal ring formed so as to be away from each other.

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