JPH0618724U - Bearing for molten metal bath - Google Patents
Bearing for molten metal bathInfo
- Publication number
- JPH0618724U JPH0618724U JP5650192U JP5650192U JPH0618724U JP H0618724 U JPH0618724 U JP H0618724U JP 5650192 U JP5650192 U JP 5650192U JP 5650192 U JP5650192 U JP 5650192U JP H0618724 U JPH0618724 U JP H0618724U
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- molten metal
- bath
- axial direction
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- Rolls And Other Rotary Bodies (AREA)
- Coating With Molten Metal (AREA)
Abstract
(57)【要約】
【目的】 比較的小さい回転抵抗で回転軸を安定して支
持し、かつ、ベアリングケース内の溶融金属の循環を良
好にした耐熱性および耐久性の高い溶融金属浴用軸受を
提供する。
【構成】 溶融亜鉛浴槽内に設けられる浴中ロールの回
転軸を支持する軸受４０は、球体４２と円筒ケース４４
とを有する。円筒ケース４４の内周部に回動可能に保持
される球体４２が回転軸３６の外周壁に当接する。球体
４２は、回転軸３６の周方向に等間隔に配置され、かつ
軸方向に所定数個配列される。円筒ケース４４は、内周
壁面に軸方向に延びる凹溝４５を有し、この凹溝４５内
に球体４２を回動可能に保持する。凹溝４５の軸方向開
口端に設けられる円筒ケース４４の係止部および環状ス
トッパは、球体４２が軸方向に脱離するのを防止する。
溶融金属は、周方向に隣合う球体４２の間を通過し円筒
ケース４４の軸方向に自由に出入りする。
(57) [Abstract] [Purpose] To provide a bearing for a molten metal bath, which supports a rotating shaft stably with a relatively small rotational resistance, and which has good circulation of the molten metal in the bearing case and has high heat resistance and durability. provide. A bearing 40, which supports a rotating shaft of a bath roll in a molten zinc bath, includes a spherical body 42 and a cylindrical case 44.
Have and. The sphere 42 rotatably held on the inner peripheral portion of the cylindrical case 44 contacts the outer peripheral wall of the rotary shaft 36. The spheres 42 are arranged at equal intervals in the circumferential direction of the rotating shaft 36, and a predetermined number of spheres 42 are arranged in the axial direction. The cylindrical case 44 has a groove 45 extending in the axial direction on the inner peripheral wall surface, and holds the sphere 42 rotatably in the groove 45. The locking portion of the cylindrical case 44 and the annular stopper provided at the axially open end of the groove 45 prevent the spherical body 42 from being detached in the axial direction.
The molten metal passes between the spheres 42 adjacent to each other in the circumferential direction, and freely flows in and out in the axial direction of the cylindrical case 44.
Description
【０００１】[0001]
本考案は、溶融金属浴用軸受に関し、例えば、連続溶融金属めっきに用いられ る浴中ロールの軸受け構造に適用されるものである。 The present invention relates to a molten metal bath bearing, and is applied to, for example, a bearing structure for a bath roll used for continuous molten metal plating.
【０００２】[0002]
一般に、薄板状の帯鋼板に亜鉛めっきを施すための装置として、帯鋼板を搬送 しつつ溶融亜鉛に浸漬し連続的にめっき作業を行えるようにした自動浸漬装置が 知られる。この種の自動浸漬装置は、溶融亜鉛浴槽内に浴中ロールを設け、この 浴中ロールに帯鋼板を巻き掛けて溶融亜鉛中に帯鋼板を安定して移動させている 。 In general, as an apparatus for galvanizing a thin strip steel sheet, an automatic dipping apparatus is known which is capable of continuously performing a plating operation by immersing the strip steel sheet in molten zinc while transporting the strip steel sheet. In this type of automatic dipping device, a bath roll is provided in a molten zinc bath, and a strip steel plate is wrapped around the bath roll to stably move the strip steel plate into the molten zinc.
【０００３】 従来より、このような浴中ロールを支持する軸受は、浴槽内が例えば５００℃ 程度の高温下にあることから、例えば図８に示すように、Ｌ字状の軸受部材２、 ３を組合わせ、これらの軸受部材２、３により形成される軸穴４に浴中ロール６ の回転軸８を挿入する。そして、溶融亜鉛中に含まれる鉄分等の浮遊物（以下、 ドロスという。）が軸穴４内から容易に排除されるように、回転軸８の周表面に 溶融亜鉛の循環効率を高める環状または螺旋状の溝９を形成していた。Conventionally, in a bearing for supporting such a roll in a bath, since the inside of the bath is under a high temperature of, for example, about 500 ° C., as shown in FIG. 8, for example, an L-shaped bearing member 2, 3 is used. And the rotating shaft 8 of the in-bath roll 6 is inserted into the shaft hole 4 formed by these bearing members 2 and 3. Then, in order that the suspended matter such as iron (hereinafter referred to as dross) contained in the molten zinc is easily removed from the shaft hole 4, an annular shape or a ring which enhances the circulation efficiency of the molten zinc is formed on the peripheral surface of the rotating shaft 8. The spiral groove 9 was formed.
【０００４】[0004]
しかしながら、このような従来の溶融金属浴用軸受によると、浴中ロールの回 転時に回転軸と軸受と摩擦係数が比較的大きいため、浴槽内で帯鋼板がスリップ して撓みやすく、搬送速度が一定に保持されにくい。また、ドロスの排出作用が 不充分であるため、軸受内にドロスが堆積すると、浴中ロールの回転抵抗が増大 し、帯鋼板にめっきむらを生じやすくなるという問題があった。 However, according to such a conventional molten metal bath bearing, since the friction coefficient between the rotating shaft and the bearing is relatively large when the rolls in the bath rotate, the strip steel plate easily slips and bends in the bath and the transport speed is constant. Hard to hold Further, since the dross discharging action is insufficient, there is a problem that if dross accumulates in the bearing, the rolling resistance of the roll in the bath increases, and uneven plating is likely to occur on the strip steel plate.
【０００５】 これに対し、筒状のベアリングケースの内周壁面に周方向に環状溝を形成し、 この環状溝に配置した複数の球体で回転軸を支持するようにした溶融金属浴用軸 受が提案されている。しかしながら、このような軸受によると、球体が周方向に 密着して配置されるため、筒体内で溶融金属の軸方向の循環が悪くなり、また、 球体がドロスを噛むと玉突きを起こして環状溝外に乗り上げ、ベアリングケース を破壊しやすくなるという問題を生じていた。On the other hand, there is a bearing for a molten metal bath in which an annular groove is formed in the inner peripheral wall surface of a cylindrical bearing case in the circumferential direction, and a rotating shaft is supported by a plurality of spheres arranged in the annular groove. Proposed. However, according to such a bearing, the spherical bodies are closely arranged in the circumferential direction, so that the circulation of the molten metal in the axial direction in the cylindrical body is deteriorated, and when the spherical body bites the dross, it causes a bead and an annular groove. There was a problem that it was easy to get out and destroy the bearing case.
【０００６】 本考案は、このような問題点を解決するためになされたもので、比較的小さい 回転抵抗で回転軸を安定して支持し、かつ、ベアリングケース内の溶融金属の循 環を良好にした耐熱性および耐久性の高い溶融金属浴用軸受を提供することを目 的とする。The present invention has been made to solve such a problem, and stably supports the rotating shaft with a relatively small rotational resistance, and satisfactorily circulates the molten metal in the bearing case. It is an object of the present invention to provide a molten metal bath bearing having high heat resistance and durability.
【０００７】[0007]
前記目的を解決するための本考案による溶融金属浴用軸受は、 回転軸の周方向に所定間隔をあけて配置され、前記回転軸を支持する球状また は円柱状の支持部材と、 前記回転軸の外周に配置され、前記支持部材を軸方向に挿入可能な凹溝に前記 支持部材を回動可能に保持するケースと、 前記凹溝の軸方向の開口端を封止するストッパとを備えたことを特徴とする。 A bearing for a molten metal bath according to the present invention for solving the above-mentioned object is a spherical or cylindrical support member which is arranged at a predetermined interval in the circumferential direction of a rotary shaft and supports the rotary shaft, and a bearing member for the rotary shaft. A case provided on the outer periphery for holding the support member rotatably in a concave groove into which the support member can be inserted in the axial direction; and a stopper for sealing the opening end of the concave groove in the axial direction. Is characterized by.
【０００８】[0008]
本考案の溶融金属浴用軸受によると、回転軸の周方向に所定間隔をあけて支持 部材を配置するため、回転軸の外周壁面とケースの内周壁面との間に軸方向に延 びる隙間が形成される。このため、ケース内壁と回転軸間の溶融金属の循環が良 好になる。また、ケースの凹溝内に支持部材が回動可能に保持されることから、 この支持部材に当接する回転軸の回転抵抗が大幅に低減する。 According to the molten metal bath bearing of the present invention, since the supporting members are arranged at a predetermined interval in the circumferential direction of the rotating shaft, there is a gap extending in the axial direction between the outer peripheral wall surface of the rotating shaft and the inner peripheral wall surface of the case. It is formed. Therefore, the circulation of the molten metal between the inner wall of the case and the rotating shaft becomes good. Further, since the support member is rotatably held in the concave groove of the case, the rotation resistance of the rotary shaft that abuts on the support member is significantly reduced.
【０００９】[0009]
以下、本考案の実施例を図面に基づいて説明する。 鋼板に亜鉛めっきするための溶融亜鉛浴槽中に用いる浴中ロールの軸受に本考 案を適用した第１実施例を図１〜図４に示す。 図３および図４に示すように、薄板状の帯鋼板に亜鉛めっきを施すための浸漬 装置２１は、溶融亜鉛が満たされる浴槽２２内に浴中ロール２４が設けられる。 浴中ロール２４は、図３に示すフレーム２５の所定の高さ位置に水平に支持され ている。浴中ロール２４に巻き掛けられる帯鋼板２６は、図示しない駆動装置に より図４に示す矢印ａ方向に引っ張られると、浴槽２２内に導入されて浴中ロー ル２４の周方向に移動するようになっている。 Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment in which the present invention is applied to a bearing of a bath roll used in a molten zinc bath for galvanizing a steel sheet. As shown in FIGS. 3 and 4, in a dipping device 21 for galvanizing a thin strip steel plate, an in-bath roll 24 is provided in a bath 22 filled with molten zinc. The in-bath roll 24 is horizontally supported at a predetermined height position of a frame 25 shown in FIG. When the strip steel plate 26 wound around the bath roll 24 is pulled in the direction of arrow a shown in FIG. 4 by a drive device (not shown), the strip steel plate 26 is introduced into the bath bath 22 and moves in the circumferential direction of the bath roll 24. It has become.
【００１０】 溶融亜鉛の液面から帯鋼板２６が所定距離引き上げられた位置には、補助ロー ル２８、２９およびワピングノズル３０、３１が設けられる。補助ロール２８、 ２９およびワピングノズル３０、３１は、帯鋼板２６の板表面に対向するように 所定間隔をあけて配置される。浴槽２２から引き上げられた帯鋼板２６は、補助 ロール２８、２９の間を通過するとき、移動方向のズレを規制され、ワピングノ ズル３０、３１の間を通過するとき、アルゴンガス等を吹きつけられて帯鋼板２ ６の板表面に付着した溶融亜鉛層を均一な層厚に調節される。Auxiliary rolls 28 and 29 and wapping nozzles 30 and 31 are provided at positions where the strip steel plate 26 is pulled up from the liquid surface of the molten zinc by a predetermined distance. The auxiliary rolls 28, 29 and the wapping nozzles 30, 31 are arranged at a predetermined interval so as to face the plate surface of the strip steel plate 26. The strip steel plate 26 pulled up from the bathtub 22 is regulated in displacement in the moving direction when passing between the auxiliary rolls 28 and 29, and is blown with argon gas or the like when passing between the warping nozzles 30 and 31. The molten zinc layer adhering to the plate surface of the strip steel plate 26 is adjusted to a uniform layer thickness.
【００１１】 浴中ロール２４は、帯鋼板２６を誘導する円筒体３４と、この円筒体３４の両 端に中心軸方向に延びるように一体に形成された回転軸３６とを有する。円筒体 ３４は、外周壁面に螺旋状の溝が所定ピッチで形成され、帯鋼板２６と円筒体３ ４との間に溶融金属が循環しやすいようになっている。そして、回転軸３６は、 フレーム２５の貫通穴に固定される軸受４０に回転可能に支持されている。The in-bath roll 24 has a cylindrical body 34 for guiding the strip steel plate 26, and a rotary shaft 36 integrally formed at both ends of the cylindrical body 34 so as to extend in the central axis direction. The cylindrical body 34 has spiral grooves formed at a predetermined pitch on the outer peripheral wall surface so that the molten metal can easily circulate between the strip steel plate 26 and the cylindrical body 34. The rotary shaft 36 is rotatably supported by a bearing 40 fixed in the through hole of the frame 25.
【００１２】 図１および図２に示すように、軸受４０は、球体４２と円筒ケース４４とを有 する。円筒ケース４４の内周部に回動可能に保持される球体４２が回転軸３６の 外周壁に当接している。 球体４２は、図３に示す回転軸３６の直径方向に２個の球体４２が対向するよ うに回転軸３６の周方向に等間隔に配置され、かつ軸方向に所定数個配列される 。径方向に対向する２個の球体４２の距離は、回転軸３６の外径よりもわずかの 大きく設定される。球体４２の寸法は、例えば、直径５〜１０ｍｍ程度とする。 これは、直径を比較的大きくすると、軸受にガタを生じやすくなるからである。As shown in FIGS. 1 and 2, the bearing 40 has a spherical body 42 and a cylindrical case 44. A spherical body 42 rotatably held on the inner peripheral portion of the cylindrical case 44 is in contact with the outer peripheral wall of the rotary shaft 36. The spheres 42 are arranged at equal intervals in the circumferential direction of the rotating shaft 36 so that the two spheres 42 face each other in the diametrical direction of the rotating shaft 36 shown in FIG. 3, and a predetermined number of spheres 42 are arranged in the axial direction. The distance between the two spherical bodies 42 facing each other in the radial direction is set to be slightly larger than the outer diameter of the rotary shaft 36. The size of the sphere 42 is, for example, about 5 to 10 mm in diameter. This is because if the diameter is relatively large, the bearing tends to rattle.
【００１３】 球体４２の材質としては、耐熱性の良好なセラミック、サーメット焼結体等を 用いるとよい。セラミック材としては、サイアロン、アルミナ−ジルコニア系セ ラミック、炭化珪素等を用いるのが望ましい。 円筒ケース４４は、内周壁面に軸方向に延びる凹溝４５を有し、この凹溝４５ 内に球体４２を回動可能に保持する。凹溝４５は、円筒ケース４４の周方向に等 間隔に複数形成されている。凹溝４５の溝面は、横断面が円弧状に形成され、溝 深さが球体４２の外径よりも小さい一定値となっている。凹溝４５の軸方向に延 びる開口部４５ａの溝幅は、球体４２が凹溝４５内から径内方向に脱離するのを 防止するため、球体４２の直径よりも小さく設定されている。これにより、凹溝 ４５に配置された球体４２は、球面の一部が凹溝４５の開口部４５ａから突出し 、回転軸３６の外周壁面に当接可能になっている。As the material of the spherical body 42, it is preferable to use ceramic, cermet sintered body or the like having good heat resistance. As the ceramic material, it is desirable to use sialon, alumina-zirconia ceramic, silicon carbide, or the like. The cylindrical case 44 has a groove 45 extending in the axial direction on the inner peripheral wall surface, and the sphere 42 is rotatably held in the groove 45. A plurality of grooves 45 are formed at equal intervals in the circumferential direction of the cylindrical case 44. The groove surface of the concave groove 45 is formed in an arc shape in cross section, and the groove depth is a constant value smaller than the outer diameter of the spherical body 42. The groove width of the opening 45a extending in the axial direction of the concave groove 45 is set smaller than the diameter of the spherical body 42 in order to prevent the spherical body 42 from being radially separated from the concave groove 45. As a result, the spherical body 42 arranged in the concave groove 45 has a part of the spherical surface protruding from the opening 45 a of the concave groove 45, and can come into contact with the outer peripheral wall surface of the rotary shaft 36.
【００１４】 円筒ケース４４の材質としては、耐摩耗性および溶融金属耐食性の良好な１３ ％Ｃｒ系鋳鋼、オーステナイト系ステンレス鋳鋼等を用いるとよい。この場合、 凹溝４５の溝面を放電硬化し、耐摩耗性をさらに向上させるようにしてもよい。 さらに、凹溝の形成方法については、例えば円筒体の内壁面に肉盛り溶接等で 肉盛りした後溝加工を施してもよい。この場合、溶接金属としてＮｂＣ、ＷＣ等 の炭化物分散系材料を用いると、凹溝の耐摩耗性が格段に向上する。As a material for the cylindrical case 44, 13% Cr-based cast steel, austenitic stainless cast steel, or the like, which has good wear resistance and molten metal corrosion resistance, may be used. In this case, the groove surface of the concave groove 45 may be hardened by discharge to further improve the wear resistance. Further, as for the method of forming the concave groove, for example, the inner wall surface of the cylindrical body may be subjected to overlay machining by overlay welding or the like and then groove processing may be performed. In this case, when a carbide-dispersed material such as NbC or WC is used as the weld metal, the wear resistance of the groove is significantly improved.
【００１５】 図２に示すように、円筒ケース４４の一端開口部には、球体４２の軸方向の移 動を係止する係止部４４ａが形成され、また、他端開口部には、係止部４４ａと ほぼ同程度の内径を有する環状ストッパ４８が固定される。これにより、球体４ ２は、凹溝４５から軸方向に脱離するのが防止されている。 円筒ケース４４の係止部４４ａの反対側の端部には、径外方向に延びるフラン ジ４７が形成される。フランジ４７の内周壁面には、環状ストッパ４８を固定す るためのねじ溝をもつ環状凹部４７ａが形成される。また、フランジ４７は、円 筒ケース４４がフレーム２５の貫通穴から浴中ロール２４の反対方向へ押し出さ れて外れるのを防止する。As shown in FIG. 2, a locking portion 44 a for locking the movement of the spherical body 42 in the axial direction is formed at one end opening of the cylindrical case 44, and an engaging portion 44 a is provided at the other end opening. An annular stopper 48 having an inner diameter approximately the same as that of the stopper 44a is fixed. As a result, the spherical body 42 is prevented from being detached from the concave groove 45 in the axial direction. A flange 47 extending radially outward is formed at an end of the cylindrical case 44 opposite to the locking portion 44a. An annular concave portion 47a having a thread groove for fixing the annular stopper 48 is formed on the inner peripheral wall surface of the flange 47. Further, the flange 47 prevents the cylindrical case 44 from being pushed out from the through hole of the frame 25 in the direction opposite to the bath roll 24 and coming off.
【００１６】 円筒ケース４４に球体４２を組付ける場合、まず、凹溝４５にフランジ４７側 から軸方向に所定数個の球体４２を挿入する。次いで、環状凹部４７ａに環状ス トッパ４８をねじ締め固定する。すると、係止部４４ａと環状ストッパ４８とに より球体４２に軸方向に荷重が加えられ、各球体４２が軸方向に密着する。この ため、各球体４２は、同一方向に回転しやすくなり、回転軸との摩擦係数が大幅 に低減する。When assembling the spherical bodies 42 into the cylindrical case 44, first, a predetermined number of spherical bodies 42 are inserted into the concave grooves 45 from the flange 47 side in the axial direction. Next, the annular stopper 48 is screwed and fixed in the annular recess 47a. Then, a load is applied to the spherical bodies 42 in the axial direction by the locking portion 44a and the annular stopper 48, and the spherical bodies 42 come into close contact with each other in the axial direction. Therefore, the spheres 42 easily rotate in the same direction, and the coefficient of friction with the rotating shaft is significantly reduced.
【００１７】 浴中ロール２４の回転時、回転軸３６の外周壁面が球体４２に点接触により当 接する。このとき、球体４２は、凹溝４５内で回動可能であるため、回転軸３６ の回動力を低減させることはない。このため、回転軸３６と軸受４０との回転抵 抗が比較的小さく保持されるので、浴中ロール２４が安定して回転し、帯鋼板２ ６をスムーズに誘導することができる。When the roll 24 in the bath rotates, the outer peripheral wall surface of the rotating shaft 36 contacts the sphere 42 by point contact. At this time, since the spherical body 42 is rotatable in the groove 45, the turning force of the rotary shaft 36 is not reduced. For this reason, since the rotational resistance between the rotary shaft 36 and the bearing 40 is kept relatively small, the roll 24 in the bath rotates stably and the strip steel plate 26 can be smoothly guided.
【００１８】 また、円筒ケース４４内に侵入したドロス等の異物は、周方向に隣合う球体４ ２の間に軸方向に貫通する隙間から自然に円筒ケース４４の外部に排出される。 このため、軸受４０は、回転軸３６、球体４２等にドロス等が堆積しにくく、異 物の付着等に起因する回転抵抗の増大はほとんど生じない。 このように前記第１実施例の軸受４０によると、浴中ロール２４の回転を円滑 にし帯鋼板２６を所定速度で正確に送ることができ、しかも、軸受４０付近の溶 融金属の流動性を良好にすることから帯鋼板２６に均質に溶融亜鉛を付着させ、 高品質のめっき処理を実現することができる。In addition, foreign matter such as dross that has entered the cylindrical case 44 is naturally discharged to the outside of the cylindrical case 44 from a gap that penetrates in the axial direction between the spherical bodies 42 adjacent in the circumferential direction. Therefore, in the bearing 40, dross or the like is unlikely to be deposited on the rotary shaft 36, the spherical body 42, and the like, and the increase of the rotational resistance due to the adhesion of foreign matter hardly occurs. As described above, according to the bearing 40 of the first embodiment, the roll 24 in the bath can be smoothly rotated and the strip steel plate 26 can be accurately fed at a predetermined speed, and moreover, the fluidity of the molten metal in the vicinity of the bearing 40 can be improved. Since it is favorable, the molten zinc can be uniformly adhered to the strip steel plate 26, and high-quality plating treatment can be realized.
【００１９】 次に、第１実施例による軸受について、耐久性および回転抵抗を試験した。試 験に用いた軸受は、軸受ケースの内周壁面に１６本の凹溝を設け、この凹溝内に 直径８ｍｍのＡｌ2 Ｏ3 −ＺｒＯ2 系セラミック球を連続封入したものである。 この軸受を補助ローラの軸受として所定期間使用した。 試験の結果、軸受ケース内周壁に４ｍｍＲの断面円弧状螺旋溝を形成した従来 の軸受に比べ、第１実施例の軸受は、使用寿命が２倍に向上し、また、浴中回転 必要トルクが１／４に低下した。なお、第１実施例の実使用期間は、延２か月で あった。これにより、前記第１実施例によると、めっき処理の作業性を向上し、 生産性を大幅に高めることが判明した。Next, the bearing according to the first embodiment was tested for durability and rotation resistance. The bearing used in the test has 16 recessed grooves formed on the inner peripheral wall surface of the bearing case, and Al 2 O 3 —ZrO 2 system ceramic balls having a diameter of 8 mm are continuously enclosed in the recessed grooves. This bearing was used as a bearing for an auxiliary roller for a predetermined period. As a result of the test, the bearing of the first embodiment has twice as long a service life as that of the conventional bearing in which the inner peripheral wall of the bearing case is formed with a spiral groove having an arcuate section of 4 mmR, and the required torque for rotation in the bath is It fell to 1/4. The actual usage period of the first example was 2 months. As a result, it was found that the workability of the plating process was improved and the productivity was significantly increased according to the first embodiment.
【００２０】 次に、本考案の第２実施例を図５に示す。 第２実施例による軸受５０は、浴中ロールの回転軸を支持する支持部材として 円柱体５２と球体４２を用いたものである。セラミック等からなる円柱体５２は 、円筒ケースの凹溝４５に球体４２と交互に軸方向に挿入される。円柱体５２の 外径は、球体４２の直径に等しく、円柱体５２の軸方向長さは、球体４２の直径 よりも大きく設定される。Next, a second embodiment of the present invention is shown in FIG. The bearing 50 according to the second embodiment uses a cylindrical body 52 and a spherical body 42 as a supporting member for supporting the rotating shaft of the bath roll. The cylindrical body 52 made of ceramic or the like is axially inserted into the concave groove 45 of the cylindrical case alternately with the spherical body 42. The outer diameter of the cylindrical body 52 is equal to the diameter of the spherical body 42, and the axial length of the cylindrical body 52 is set larger than the diameter of the spherical body 42.
【００２１】 浴中ロール２４の回転時、円柱体５２は、回転軸３６の外周壁面に線接触で当 接し、凹溝４５内で周方向に自由に回動する。このため、回転軸３６の回転抵抗 を比較的小さく保持する。 第２実施例によると、円柱体５２と回転軸３６とが線接触し、球体４２と回転 軸３６とが点接触となるため、円柱体５２および球体４２に作用する単位面積当 たりの負荷荷重が低減されるので耐久性が向上する。また、回転軸３６の支持体 に円柱体を用いるため、部品点数が減り軸受４０の組付性が良好になる。また、 円柱体に比べ製作コストの高い球体４２の使用数を少なくすることができるため 、前記第１実施例に比べ製造コストを低減させることができる。なお、円柱体に 両端に半球体を一体成形したものを用いることも可能である。When the in-bath roll 24 rotates, the columnar body 52 comes into linear contact with the outer peripheral wall surface of the rotating shaft 36, and freely rotates in the circumferential direction in the concave groove 45. Therefore, the rotational resistance of the rotary shaft 36 is kept relatively small. According to the second embodiment, the cylindrical body 52 and the rotary shaft 36 make a line contact, and the spherical body 42 and the rotary shaft 36 make a point contact, so that the load applied per unit area acting on the cylindrical body 52 and the spherical body 42. Is reduced and durability is improved. Further, since the columnar body is used as the support of the rotary shaft 36, the number of parts is reduced and the assemblability of the bearing 40 is improved. Further, since the number of the spherical bodies 42 used, which is higher in manufacturing cost than the cylindrical body, can be reduced, the manufacturing cost can be reduced as compared with the first embodiment. In addition, it is also possible to use a cylindrical body integrally formed with hemispheres at both ends.
【００２２】 本考案の第３実施例を図６に示す。 第３実施例による軸受６０は、上ケース６２および下ケース６４からなる半割 りタイプのものである。上ケース６２および下ケース６４の半円弧状面に周方向 に等間隔に軸方向に延びる凹溝４５が形成されている。上ケース６２および下ケ ース６４の端面６２ａ、６４ａを合わせると、球体４２が回転軸３６の外周壁面 に当接する。A third embodiment of the present invention is shown in FIG. The bearing 60 according to the third embodiment is of a half-split type including an upper case 62 and a lower case 64. The semicircular surfaces of the upper case 62 and the lower case 64 are formed with grooves 45 extending in the axial direction at equal intervals in the circumferential direction. When the end faces 62a, 64a of the upper case 62 and the lower case 64 are brought together, the spherical body 42 comes into contact with the outer peripheral wall surface of the rotating shaft 36.
【００２３】 第３実施例によると、回転軸３６の脱着作業が比較的容易になるため、回転軸 ３６等のメンテナンス作業が実施しやすくなる。 本考案の第４実施例を図７に示す。 第４実施例による軸受７０は、互いに直交する方向に延びる第１板部７２およ び第２板部７４からなるケース７６を有し、このケース７６の軸方向に延びる半 円弧面に球体４２を保持する凹溝４５を形成したものである。第１板部７２を水 平にし、第２板部７４を垂直に配置すると、回転軸３６を比較的安定に支持し、 かつ脱着しやすくなる。According to the third embodiment, since the work of attaching and detaching the rotary shaft 36 becomes relatively easy, the work of maintaining the rotary shaft 36 and the like becomes easy to carry out. A fourth embodiment of the present invention is shown in FIG. The bearing 70 according to the fourth embodiment has a case 76 composed of a first plate portion 72 and a second plate portion 74 extending in directions orthogonal to each other, and a spherical body 42 is formed on a semi-circular surface extending in the axial direction of the case 76. The concave groove 45 for holding is formed. When the first plate portion 72 is horizontal and the second plate portion 74 is arranged vertically, the rotary shaft 36 is supported relatively stably and is easily attached and detached.
【００２４】 第４実施例によると、ロール脱着がさらに容易になるため、補助ロールの回転 軸の軸受に用いると、帯鋼板２６の取替時の作業時間を短縮化することができる 。According to the fourth embodiment, the roll can be easily attached and detached. Therefore, when the roll is used as a bearing for the rotating shaft of the auxiliary roll, the working time for replacing the strip steel plate 26 can be shortened.
【００２５】[0025]
以上説明したように、本考案の溶融金属浴用軸受によれば、ケースの内周に回 転軸を支持する支持部材を所定間隔をあけて回動可能に配置する構成としたため 、ケース内に溶融金属の循環を良好にし、かつ回転軸の回転抵抗を大幅に低減さ せることができるという効果がある。 As described above, according to the molten metal bath bearing of the present invention, since the supporting member for supporting the rotating shaft is rotatably arranged at a predetermined interval on the inner circumference of the case, the molten metal bath bearing is melted in the case. This has the effects of improving the circulation of metal and significantly reducing the rotational resistance of the rotary shaft.
【図１】本考案の第１実施例による溶融金属浴用軸受を
示す正面図である。FIG. 1 is a front view showing a bearing for molten metal bath according to a first embodiment of the present invention.
【図２】図１に示すＡ−Ａ線縦断面図である。FIG. 2 is a vertical sectional view taken along the line AA shown in FIG.
【図３】本考案の第１実施例による浸漬装置を示す模式
側面図である。FIG. 3 is a schematic side view showing an immersion device according to a first embodiment of the present invention.
【図４】本考案の第１実施例による浸漬装置を示す模式
正面図である。FIG. 4 is a schematic front view showing a dipping device according to a first embodiment of the present invention.
【図５】本考案の第２実施例による溶融金属浴用軸受を
示す縦断面図である。FIG. 5 is a vertical cross-sectional view showing a bearing for molten metal bath according to a second embodiment of the present invention.
【図６】本考案の第３実施例による溶融金属浴用軸受を
示す模式正面図である。FIG. 6 is a schematic front view showing a bearing for molten metal bath according to a third embodiment of the present invention.
【図７】本考案の第４実施例による溶融金属浴用軸受を
示す模式正面図である。FIG. 7 is a schematic front view showing a bearing for molten metal bath according to a fourth embodiment of the present invention.
【図８】従来の溶融金属浴用軸受の一例を示す斜視図で
ある。FIG. 8 is a perspective view showing an example of a conventional molten metal bath bearing.
３６ 回転軸 ４０ 軸受（溶融金属浴用軸受） ４２ 球体（支持部材） ４４ 円筒ケース（ケース） ４４ａ 係止部（ストッパ） ４５ 凹溝 ４８ 環状ストッパ（ストッパ） 36 rotating shaft 40 bearing (molten metal bath bearing) 42 spherical body (supporting member) 44 cylindrical case (case) 44a locking portion (stopper) 45 concave groove 48 annular stopper (stopper)
Claims (1)
され、前記回転軸を支持する球状または円柱状の支持部
材と、 前記回転軸の外周に配置され、前記支持部材を軸方向に
挿入可能な凹溝に前記支持部材を回動可能に保持するケ
ースと、 前記凹溝の軸方向の開口端を封止するストッパとを備え
たことを特徴とする溶融金属浴用軸受。1. A spherical or cylindrical support member, which is arranged at a predetermined interval in the circumferential direction of the rotary shaft and supports the rotary shaft, and a support member, which is arranged on the outer periphery of the rotary shaft, in the axial direction. A bearing for a molten metal bath, comprising a case that rotatably holds the support member in a groove that can be inserted, and a stopper that seals an axial opening end of the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5650192U JPH0618724U (en) | 1992-08-11 | 1992-08-11 | Bearing for molten metal bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5650192U JPH0618724U (en) | 1992-08-11 | 1992-08-11 | Bearing for molten metal bath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0618724U true JPH0618724U (en) | 1994-03-11 |
Family
ID=13028861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5650192U Pending JPH0618724U (en) | 1992-08-11 | 1992-08-11 | Bearing for molten metal bath |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0618724U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011068160A1 (en) * | 2009-12-02 | 2011-06-09 | 住友重機械工業株式会社 | Gear device |
-
1992
- 1992-08-11 JP JP5650192U patent/JPH0618724U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011068160A1 (en) * | 2009-12-02 | 2011-06-09 | 住友重機械工業株式会社 | Gear device |
| JP2011117521A (en) * | 2009-12-02 | 2011-06-16 | Sumitomo Heavy Ind Ltd | Gear device |
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