JPH1160788A - Porous resin and bearing device using porous resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject inexpensive resin, capable of providing a bearing device excellent in oil recovering functions and excellent in the functions by thermally melting a granular material of an olefinic resin and an additive and then eluting and removing the additive. SOLUTION: This porous resin is obtained by mixing (A) a granular material of an olefinic resin (e.g. polyethylene or polypropylene) with (B) a water-soluble finely divided additive (e.g. sodium chloride or sodium sulfate), thermally melting the resultant mixture, then eluting the initially added component B from the prepared solid mixture with water and removing the component B. An oil recovering member is preferably composed of the objective resin to afford a bearing device.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、多孔質組成の多孔
質樹脂及び多孔質樹脂を用いた軸受装置に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a porous resin having a porous composition and a bearing device using the porous resin.

【０００２】[0002]

【従来の技術】例えば実開昭６２―１４９５０号公報に
は、無給油式の軸受装置が示されている。この種の軸受
装置は、図６に示すように電動機の外殻１０１により軸
受１０３が保持され、この軸受１０３の周囲に接する状
態に含油部材１０４が設けられている。軸受１０３に挿
通された回転軸１０５の軸方向に含油部材１０４に連接
して、回転軸１０５を取り囲むようにフェルト材からな
る油回収部材１０６が設けられている。回転軸１０５に
はこの油回収部材１０６に包囲される油切りカラー１０
７が装着されている。この軸受装置では、軸受１０３か
ら回転軸１０５を伝って流出した潤滑油は、油切りカラ
ー１０７に達し、回転軸１０５と共回りする油切りカラ
ー１０７により飛散され、周囲にある油回収部材１０６
に吸着されることにより回収される。2. Description of the Related Art For example, Japanese Unexamined Utility Model Publication No. Sho 62-14950 discloses an oilless bearing device. In this type of bearing device, as shown in FIG. 6, a bearing 103 is held by an outer shell 101 of an electric motor, and an oil-impregnated member 104 is provided in contact with the periphery of the bearing 103. An oil recovery member 106 made of a felt material is provided so as to be connected to the oil-containing member 104 in the axial direction of the rotary shaft 105 inserted into the bearing 103 and surround the rotary shaft 105. The rotating shaft 105 has an oil draining collar 10 surrounded by the oil collecting member 106.
7 is mounted. In this bearing device, the lubricating oil flowing out of the bearing 103 along the rotating shaft 105 reaches the oil draining collar 107, is scattered by the oil draining collar 107 rotating together with the rotary shaft 105, and the surrounding oil collecting member 106
It is recovered by being adsorbed on.

【０００３】しかしながら、含油部材１０４や油回収部
材１０６がフェルト材により構成されていると、フェル
ト材から繊維屑が出やすく、この繊維屑が他の塵埃とと
もに回転軸１０５側に付着して、軸受１０３から出た潤
滑油が油回収部材１０６側へ飛散することを妨害するよ
うなことも起り易く、油回収機能が低下する。このよう
な不都合を防止するために、油回収部材１０６を多孔質
樹脂により構成した軸受装置も開発されている。この油
回収部材１０６に使われている多孔質樹脂は、従来にお
いては１００〜３５０μｍ程度の粉体に加工された樹脂
を、その粉体状態を保持したまま熱により粉体相互を結
合させることで連通した多孔質組成を得る方法や、特開
昭６１―８５４５０号公報に示されているような方法で
製造されている。[0003] However, if the oil-containing member 104 and the oil recovery member 106 are made of felt material, fiber waste is likely to come out of the felt material, and the fiber waste adheres to the rotating shaft 105 side together with other dust, and the bearing material is removed. It is easy for the lubricating oil discharged from 103 to scatter to the oil recovery member 106 side, and the oil recovery function is reduced. In order to prevent such inconvenience, a bearing device in which the oil recovery member 106 is made of a porous resin has been developed. The porous resin used in the oil recovery member 106 is a resin that has conventionally been processed into a powder of about 100 to 350 μm, and the powder is bonded to each other by heat while maintaining the powder state. It is produced by a method for obtaining a continuous porous composition or a method as disclosed in JP-A-61-85450.

【０００４】前者は、１００〜３５０μｍ程度の粉体に
加工されたポリエチレン又はポリプロピレンの粉状樹脂
を、圧縮成形機の金型の成形空間に振動を加えながら自
重によって定量を充填し、金型を閉じて成形した後、加
熱炉で約２２０〜２５０℃の熱を１０分〜１５分加えて
粉状樹脂の粉状態を保持したまま熱により相互を結合さ
せ連通した多孔質組成を得る仕方である。後者は、プラ
スチックフィルムやシートの片面に水溶性樹脂よりなる
連続する線状の皮膜を形成し、これを積層し熱溶融させ
て一体化させた後、水溶液中で皮膜を溶出させて取り除
き、連続的な通気孔を得る仕方である。[0004] In the former, a fixed amount of a powdery resin of polyethylene or polypropylene processed into a powder of about 100 to 350 µm is charged by its own weight while applying vibration to a molding space of a mold of a compression molding machine. After closing and molding, a method of applying a heat of about 220 to 250 ° C. for 10 to 15 minutes in a heating furnace to combine with each other by heat while maintaining the powdery state of the powdery resin to obtain a continuous porous composition. . The latter forms a continuous linear film made of a water-soluble resin on one side of a plastic film or sheet, laminates it, melts it and integrates it. It is a way to obtain a proper ventilation hole.

【０００５】[0005]

【発明が解決しようとする課題】上記のような従来の多
孔質樹脂は、多孔組成の粗密を任意に調整することが困
難であり、しかも表面を加熱溶融するためどうしても表
面部の多孔組成が損なわれ易く、多孔組成による機能が
低下し勝ちであった。従って、これを油回収部材に用い
た軸受装置も油回収機能に不満が残るものであった。ま
た、多孔質樹脂そのものが量産しにくくコストも高いと
いった問題点があった。即ち、粉状樹脂を使うもので
は、粉状のままの粉状樹脂が取扱い難く、複雑な加熱制
御を備えた加熱炉も必要であり、自動化が困難であっ
た。特にポリエチレンの粉状樹脂は、静電気により金型
に付着するため、成形空間への自重により落下させての
充填は随分面倒な作業となるうえ、付着した粉状樹脂を
金型から除去する清掃にも手間がかかる。[0007] Conventional porous resin as described above, it is difficult to arbitrarily adjust the density of the porous composition, yet absolutely porous composition of the surface portion is impaired for heating melt surface It was easy to be deteriorated, and the function by the porous composition was likely to decrease. Therefore, the bearing device using the oil collecting member as the oil collecting member is still unsatisfied with the oil collecting function. In addition, there is a problem that the porous resin itself is difficult to mass-produce and the cost is high. That is, in the case of using a powdery resin, it is difficult to handle the powdery resin as it is, and a heating furnace having complicated heating control is required, and automation is difficult. In particular, polyethylene powder resin adheres to the mold due to static electricity, so filling it by dropping it into the molding space by its own weight is a very cumbersome operation, and cleaning for removing the powder resin that has adhered from the mold. It also takes time.

【０００６】一方、水溶性樹脂の皮膜を形成したプラス
チックフィルム又はシートの積層体による多孔質樹脂
は、多孔質といっても一連の通気孔による組成しか得ら
れず、全体が多孔組成とはならないため、得られる多孔
質樹脂の用途は限定されたものとなるので、軸受の油回
収部材には用いることができない。On the other hand, a porous resin made of a laminate of a plastic film or a sheet having a water-soluble resin film formed thereon can be obtained only by a series of vents even if it is porous, and does not have a porous composition as a whole. Therefore, the use of the obtained porous resin is limited, and it cannot be used for an oil recovery member of a bearing.

【０００７】本発明は、上記した従来の問題点を解消す
るためになされたもので、本発明の課題とするところ
は、広範な用途を持つ機能の優れた安価な多孔質樹脂を
得ることであり、その多孔質樹脂を用いて油回収機能の
優れた軸受装置を得ることである。The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to obtain an inexpensive porous resin having a wide range of uses and excellent functions. There is a need to obtain a bearing device having an excellent oil recovery function using the porous resin.

【０００８】[0008]

【課題を解決するための手段】前記課題を達成するため
に請求項１の発明は、オレフィン系の樹脂の粒体と水溶
性の微細な添加材を混合し加熱溶融した後に得られる固
体の混合物から当初添加した添加材を水により溶出させ
て除去して多孔質樹脂を得る手段を採用する。In order to achieve the above object, an object of the present invention is to provide a solid mixture obtained by mixing granules of an olefin-based resin and a water-soluble fine additive and melting them by heating. Means for obtaining a porous resin by eluting and removing the additive initially added from water.

【０００９】前記課題を達成するために請求項２の発明
は、回転する軸を回転可能に保持する含油素材により構
成した軸受の周囲に潤滑油を含浸させた含油部材を配設
し、この含油部材に軸受から流出する潤滑油を回収して
戻す油回収部材を備えた軸受装置について、その油回収
部材を、オレフィン系の樹脂の粒体と水溶性の微細な添
加材を混合し加熱溶融した後に得られる固体の混合物か
ら当初添加した添加材を水により溶出させて除去して得
られる多孔質樹脂により構成する手段を採用する。According to another aspect of the present invention, an oil-impregnated member impregnated with lubricating oil is provided around a bearing made of an oil-impregnated material for rotatably holding a rotating shaft. For a bearing device equipped with an oil recovery member that recovers and returns the lubricating oil flowing out of the bearing to the member, the oil recovery member was heated and melted by mixing olefin resin particles and a water-soluble fine additive. A means composed of a porous resin obtained by eluting and removing the initially added additive from the solid mixture obtained later with water is employed.

【００１０】[0010]

【発明の実施の形態】次に本発明の実施の形態を図面に
基づいて説明する。 実施の形態１．図１，２により示すこの実施の形態１の
多孔質樹脂は、図１に示すようなオレフィン系の樹脂が
粒状態で絡み合うように接合し、粒状部分１間に微細な
連続した空隙２が不規則に表面及び内部の全体にわたり
ほぼ一様に多数分布する多孔質組成をしたものであり、
軽量で高い吸水性（吸油性）や吸音性を具備し、広範な
用途を持つプラスチック材料である。Embodiments of the present invention will now be described with reference to the drawings. Embodiment 1 FIG. The porous resin of the first embodiment shown in FIGS. 1 and 2 is joined such that the olefin-based resin shown in FIG. 1 is entangled in a granular state, and fine continuous voids 2 are not present between the granular portions 1. It has a porous composition that is distributed almost uniformly over the entire surface and inside in a regular manner,
A plastic material that is lightweight, has high water absorption (oil absorption) and sound absorption, and has a wide range of applications.

【００１１】多孔質樹脂３の原材料は、ポリエチレン又
はポリプロピレン等のオレフィン系樹脂の粒体４と、塩
化ナトリウム又は硫酸ナトリウム等の水溶性の添加材５
である。粒体４は市販されているプラスチック材料のペ
レットでもよいが、１００〜３５０μｍ程度の粒径のも
のが添加材５との馴染みもよく混合がし易い。添加材５
は微細な粉末又は粒状のものを使い、例えば重量比で９
０パーセントの添加材５に対し１０パーセントの粒体４
を混合した混合物６を作る。具体的には図２に示すよう
に二軸押出機７の一軸のホッパ８から添加材５を、他の
一軸のホッパ９から粒体４を投入し、自動計測手段によ
り所定の割合になるように計量して、まず粒体４を二軸
押出機７の混合部１０に送り込む。混合部１０には約１
７０℃に加熱された二本のスクリュー１１が回転してお
り、送り込まれた粒体４を加熱溶融させ流動化させる。The raw materials of the porous resin 3 are granules 4 of an olefin resin such as polyethylene or polypropylene, and a water-soluble additive 5 such as sodium chloride or sodium sulfate.
It is. The granules 4 may be pellets of a commercially available plastic material, but those having a particle size of about 100 to 350 μm are well compatible with the additive 5 and are easily mixed. Additive 5
Uses fine powder or granules, for example, 9
10% granules 4 for 0% additive 5
To make a mixture 6. Specifically, as shown in FIG. 2, the additive 5 is charged from a single-screw hopper 8 of the twin-screw extruder 7 and the granules 4 are charged from another single-screw hopper 9. First, the granules 4 are fed into the mixing section 10 of the twin-screw extruder 7. Approximately 1
The two screws 11 heated to 70 ° C. are rotating, and the fed granules 4 are heated and melted and fluidized.

【００１２】続いて混合部１０に添加材５が送り込ま
れ、流動化した樹脂に添加材５が混ぜられ撹拌されて、
流動性のある混合物６が混合部１０において作られる。
この混合物６は二軸押出機７の出口から麺状の形態で押
出され、切断機１２のカッタ１３によって例えば２．５
ｍｍ径で長さ３ｍｍ程に切断され、多数のペレット１４
にされる。以上は混合の工程であり、この後は成形工程
に移行する。Subsequently, the additive 5 is fed into the mixing section 10 and the fluidized resin is mixed with the additive 5 and stirred.
A fluid mixture 6 is formed in the mixing section 10.
The mixture 6 is extruded in a noodle-like form from the outlet of the twin-screw extruder 7,
mm and cut to a length of about 3 mm.
To be. The above is the mixing step, and thereafter the process proceeds to the molding step.

【００１３】成形工程は、射出成形機１５を使って行な
われる。射出成形機１５のホッパに多数のペレット１４
を投入し、射出成形機１５の外周に巻かれたヒーターの
熱と、射出成形機１５のスクリュー１６によりペレット
１４がせん断されるときの発熱とによりペレット１４を
溶融させ、流動化させ、これを予め定められた量ずつス
クリュー１６の回転により射出圧力をかけてノズルから
金型１７に流し込み、金型１７の成形空間に充填する。
金型１７内で固化した混合物６を金型１７を開放して取
り出せば、混合物６の成形物１８ができる。この成形物
１８は、多孔質組成でなく緻密な組成をしており、次の
添加材除去工程で多孔組成に変化する。The molding process is performed using an injection molding machine 15. A large number of pellets 14 are placed in the hopper of the injection molding machine 15.
The pellet 14 is melted and fluidized by the heat of the heater wound around the outer periphery of the injection molding machine 15 and the heat generated when the pellet 14 is sheared by the screw 16 of the injection molding machine 15. The injection pressure is applied by a predetermined amount of rotation of the screw 16, the resin is poured into the mold 17 from the nozzle, and is filled in the molding space of the mold 17.
When the mixture 6 solidified in the mold 17 is opened and taken out, a molded product 18 of the mixture 6 is obtained. The molded product 18 has a dense composition instead of a porous composition, and changes to a porous composition in the next additive removing step.

【００１４】添加材除去工程は、成形物１８から添加材
５を除去する工程であり、成形物１８を水１９に浸漬す
ることにより行なわれる。浸漬する水１９は停滞してい
るより流水の方が添加材５の濃度も上がらず除去の進行
が早く、確実性も高いので、流水槽を使って行なう方が
よい。流水槽に成形物１８を約２４時間浸漬しておけ
ば、成形物１８に含有されていた水溶性の添加材５は水
に溶出し、成形物１８から除去される。添加材５の除去
された成形物１８は、添加材５の抜け跡による空隙２が
表面及び内部の全体にでき、多孔質組成となる。これを
自然乾燥又は強制乾燥させて空隙２から水１９を除去す
れば多孔質樹脂３が得られる。The additive removing step is a step of removing the additive 5 from the molded product 18, and is performed by immersing the molded product 18 in water 19. The water 19 to be immersed in the flowing water does not increase in the concentration of the additive 5 and the removal progresses faster and the reliability is higher than in the stagnant water. If the molded article 18 is immersed in the flowing water tank for about 24 hours, the water-soluble additive 5 contained in the molded article 18 elutes in water and is removed from the molded article 18. The molded article 18 from which the additive 5 has been removed has a porous composition on the entire surface and inside due to traces of the additive 5, resulting in a porous composition. The porous resin 3 can be obtained by removing the water 19 from the voids 2 by air drying or forced drying.

【００１５】盤状やブロックの多孔質樹脂３を得る場合
には、オレフィン系の樹脂の粒体４と添加材５を混合し
加熱溶融した後に盤状やブロックの固体の混合物６と
し、この混合物６から当初添加した添加材５を添加材除
去工程により除去すればよい。また、粒体４と添加材５
を混合し、一旦この混合物６をペレット１４にする方が
扱い易く射出成形には向いているが、加熱溶融した混合
物６をそのまま射出成形機１５に送り込んで射出成形
し、その成形物１８から添加材除去工程で添加材５を除
去しても前述と同様の多孔質樹脂３を得ることができ
る。樹脂の粒体４と添加材５との混合割合は多孔質組成
の多孔状態を決定するものであり、その割合を調節する
ことにより用途に応じた空隙２を持つ多孔質樹脂３を得
ることができる。毛細管現象による吸水性の高い多孔質
樹脂３の場合には前述のように粒体４と添加材５とを重
量比で１対９とするとよく、この割合による多孔質樹脂
３は吸音性も高く、吸音材や浄水器等のフィルターにも
適しているが、２対８程度までの混合比なら多孔組成に
よる機能の良好な多孔質樹脂が得られる。In order to obtain a disk-shaped or block-shaped porous resin 3, the olefin-based resin particles 4 and the additive 5 are mixed and heated and melted, and then a disk-shaped or block-shaped solid mixture 6 is obtained. The additive material 5 initially added from 6 may be removed in the additive material removing step. The granules 4 and the additive 5
It is easier to handle and mix the mixture 6 into pellets 14 and is suitable for injection molding. However, the mixture 6 heated and melted is directly sent to an injection molding machine 15 for injection molding, and added from the molded product 18. Even if the additive material 5 is removed in the material removing step, the same porous resin 3 as described above can be obtained. The mixing ratio of the resin particles 4 and the additive 5 determines the porous state of the porous composition. By adjusting the mixing ratio, it is possible to obtain the porous resin 3 having the voids 2 according to the application. it can. In the case of the porous resin 3 having high water absorption due to the capillary action, the weight ratio between the granules 4 and the additive 5 is preferably 1 to 9 as described above, and the porous resin 3 having this ratio has high sound absorption. It is also suitable for filters such as sound absorbing materials and water purifiers, but if the mixing ratio is up to about 2 to 8, a porous resin having a good function due to the porous composition can be obtained.

【００１６】添加材５は水溶性の形状保持の可能な微細
なものであればよいが、塩化ナトリウム又は硫酸ナトリ
ウムが安価でもあり最も利用しやすく、効果的に多孔質
組成を得ることができる。いずれにしろ、粉状の樹脂を
直接自重を利用して金型に充填することはなく、複雑な
加熱制御を備えた加熱炉等の設備も不要であり、簡易に
低コストで機能の優れた多孔質樹脂３を得ることができ
る。前述の各工程は容易に自動化が可能であり多孔質樹
脂３を容易に量産することができる。The additive 5 may be any fine material that can maintain a water-soluble shape, but sodium chloride or sodium sulfate is inexpensive and most easily used, and a porous composition can be obtained effectively. In any case, the powdered resin is not directly charged into the mold using its own weight, and there is no need for equipment such as a heating furnace with complicated heating control. The porous resin 3 can be obtained. The above steps can be easily automated, and the porous resin 3 can be easily mass-produced.

【００１７】実施の形態２．図３〜図５により示すこの
実施の形態２は、実施の形態１で示した多孔質樹脂３を
回転軸２１を縦方向にして使う電動機の軸受装置に適用
したものである。図３に示すように電動機の回転軸２１
は軸受２２により回転可能に支持されている。この軸受
２２は、焼結金属等の多孔質の含油素材により構成さ
れ、筐体状の保持部材２３内に内装され、保持部材２３
を介して電動機の外殻２４に保持されている。保持部材
２３は上部側の軸受側部分２５と、下部側の軸回り部分
２６とに分割されている。軸受側部分２５は上プレート
２７及びフレーム２８並びにこれらを外側から囲むブラ
ケット２９により構成され、ブラケット２９において電
動機の外殻２４の一面にカシメ付けられている。Embodiment 2 FIG. The second embodiment shown in FIGS. 3 to 5 is one in which the porous resin 3 shown in the first embodiment is applied to a bearing device for an electric motor using a rotating shaft 21 in a vertical direction. As shown in FIG.
Is rotatably supported by a bearing 22. The bearing 22 is made of a porous oil-impregnated material such as a sintered metal, and is housed inside a housing-like holding member 23.
Are held on the outer shell 24 of the motor. The holding member 23 is divided into an upper bearing-side part 25 and a lower-side shaft part 26. The bearing-side portion 25 includes an upper plate 27, a frame 28, and a bracket 29 that surrounds the upper plate 27 and the frame 28. The bracket 29 is caulked to one surface of the outer shell 24 of the electric motor.

【００１８】軸回り部分２６は、図３に示すようにカッ
プ状の容器体として構成され、軸受側部分２５に対向さ
せる取付側には外方へ突き出すフランジ３０を備えてい
る。また、軸回り部分２６の底部は受け部３１として構
成され、その中央には回転軸２１を挿通する回転軸２１
の外径より少し大きい内径の軸挿通孔が設けられてい
る。この軸挿通孔の口縁には回転軸２１に近接し、軸受
２２側に向う立上りが内向きに形成されている。この軸
回り部分２６も取付側のフランジ３０を介して電動機の
外殻２４に軸受側部分２５に対向してカシメ付けられて
いる。The shaft portion 26 is formed as a cup-shaped container body as shown in FIG. 3, and has a flange 30 protruding outward on the mounting side facing the bearing side portion 25. In addition, the bottom of the portion 26 around the axis is configured as a receiving portion 31, and the center of the receiving portion 31 is
A shaft insertion hole having an inner diameter slightly larger than the outer diameter of the shaft is provided. At the edge of the shaft insertion hole, a rising portion which is close to the rotating shaft 21 and faces the bearing 22 is formed inward. The shaft portion 26 is also caulked to the outer shell 24 of the electric motor via the flange 30 on the mounting side so as to face the bearing side portion 25.

【００１９】保持部材２３の軸受側部分２５の上プレー
ト２７とフレーム２８とブラケット２９により画成され
た空所には、円環状のフェルト材に潤滑油を含ませた潤
滑部材３２が内装されている。この潤滑部材３２は、軸
受２２の外周にその内周が当接している。また、保持部
材２３の軸回り部分２６と軸受側部分２５の内部には、
当該部の回転軸２１の周囲を隙間をもって囲む油回収部
材３３がそれぞれ内装されている。この各油回収部材３
３は、実施の形態１で示した多孔質樹脂３を図４に示す
ような円筒形に形成したもので、その一端側に形成され
た複数個の突部３４がフレーム２８と上プレート２７と
に開けられた複数個の孔から潤滑部材３２側に突入して
潤滑部材３２に当接するように連設されている。In the space defined by the upper plate 27, the frame 28 and the bracket 29 of the bearing-side portion 25 of the holding member 23, a lubricating member 32 in which lubricating oil is contained in an annular felt material is provided. I have. The lubricating member 32 has an inner periphery in contact with an outer periphery of the bearing 22. In addition, the inside of the shaft rotation portion 26 and the bearing side portion 25 of the holding member 23 include
Oil recovery members 33 that surround the rotation shaft 21 of the portion with a gap are provided therein. Each oil recovery member 3
Reference numeral 3 denotes a porous resin 3 shown in Embodiment 1 formed in a cylindrical shape as shown in FIG. 4, and a plurality of protrusions 34 formed at one end thereof are formed by a frame 28, an upper plate 27 and The lubricating member 32 is connected to the lubricating member 32 through a plurality of holes.

【００２０】軸回り部分２６内の油回収部材３３の内周
面に臨む回転軸２１には、軸挿通孔寄りの回転軸２１と
油回収部材３３との隙間において、回転軸２１と共回り
するゴム等によりなる円盤状の油切り部材３５が回転軸
２１との間での液密を保持して装着されている。また、
軸受２２の上部側の回転軸２１には油回収部材３３に囲
まれる油切り機能を果たす円環状のカラー３６が装着さ
れている。The rotary shaft 21 facing the inner peripheral surface of the oil recovery member 33 in the shaft rotation portion 26 rotates together with the rotary shaft 21 in a gap between the rotary shaft 21 near the shaft insertion hole and the oil recovery member 33. A disk-shaped oil draining member 35 made of rubber or the like is mounted while maintaining liquid tightness with the rotating shaft 21. Also,
An annular collar 36 that functions as an oil drain and is surrounded by an oil recovery member 33 is mounted on the rotating shaft 21 on the upper side of the bearing 22.

【００２１】この実施の形態２の軸受装置においては、
回転軸２１を垂直方向にして電動機を機能させる場合
に、潤滑油の循環経路を形成することができる。即ち、
回転軸２１が回転している状態で、軸受２２から回転軸
２１を伝って流下する潤滑油はやがて油切り部材３５に
達し、回転している油切り部材３５の遠心力を受けてそ
の上面を外周方向に移動し、油回収部材３３に向って吹
き飛ばされ、油回収部材３３に吸着される。油回収部材
３３に吸着された潤滑油は、毛細管現象により接触して
いる潤滑部材３２に移動し、潤滑油は循環される。軸受
２２の上側から回転軸２１に伝って移動した潤滑油も、
カラー３６に到達するとカラー３６に吹き飛ばされ、油
回収部材３３に吸着される。油回収部材３５に吸着され
た潤滑油は、重力及び毛細管現象により接触している潤
滑部材３２に移動し、潤滑油は循環される。回転軸２１
が停止している状態では、軸受２２から回転軸２１を伝
って流下した潤滑油は、油切り部材３５に達し上面に溜
ることになる。この状態で回転軸２１が回転すれば、上
述したような経路で溜った潤滑油は回収される。In the bearing device according to the second embodiment,
When the electric motor is operated with the rotating shaft 21 in the vertical direction, a circulation path for lubricating oil can be formed. That is,
In a state where the rotating shaft 21 is rotating, the lubricating oil flowing down from the bearing 22 along the rotating shaft 21 eventually reaches the oil draining member 35, and receives the centrifugal force of the rotating oil draining member 35 to change the upper surface thereof. It moves in the outer peripheral direction, is blown off toward the oil recovery member 33, and is absorbed by the oil recovery member 33. The lubricating oil adsorbed by the oil collecting member 33 moves to the lubricating member 32 that is in contact with it by capillary action, and the lubricating oil is circulated. The lubricating oil moved from the upper side of the bearing 22 to the rotating shaft 21 also
When it reaches the collar 36, it is blown off by the collar 36 and is adsorbed by the oil recovery member 33. The lubricating oil adsorbed on the oil recovery member 35 moves to the lubricating member 32 that is in contact with it by gravity and capillary action, and the lubricating oil is circulated. Rotating shaft 21
Is stopped, the lubricating oil flowing down from the bearing 22 along the rotating shaft 21 reaches the oil draining member 35 and accumulates on the upper surface. If the rotating shaft 21 rotates in this state, the lubricating oil accumulated on the above-described path is collected.

【００２２】このようにこの実施の形態２の軸受装置で
は潤滑油の循環経路が確保され、潤滑油が外部へ流出し
ないため、外部から潤滑油を補給する必要もなく、軸受
装置の寿命をより延ばすことができる。潤滑油の外部へ
の流出がないので、天井等に設けられる換気装置等の機
器の電動機に対する軸受装置として好適である。また、
潤滑部材３２のみがフェルト材により構成されているの
で、潤滑油の循環を妨害する要因になりやすい繊維屑が
出ることも少ない。但し、油回収部材３３を構成してい
る多孔質樹脂３は吸水性（吸油性）が高いものであるか
ら、潤滑部材３２も多孔質樹脂３により構成してもよ
い。従って、図５に示すような回転軸２１を水平方向に
して使う電動機の軸受装置の潤滑部材３２にもこの多孔
質樹脂３を使うことができ、安価で油回収機能の優れた
軸受装置が得られる。As described above, in the bearing device according to the second embodiment, a circulation path for the lubricating oil is ensured, and the lubricating oil does not flow out. Therefore, it is not necessary to supply the lubricating oil from the outside, and the life of the bearing device can be extended. Can be extended. Since the lubricating oil does not flow out, it is suitable as a bearing device for a motor of a device such as a ventilation device provided on a ceiling or the like. Also,
Since only the lubricating member 32 is made of a felt material, fiber debris, which tends to hinder the circulation of the lubricating oil, rarely occurs. However, since the porous resin 3 constituting the oil recovery member 33 has high water absorption (oil absorption), the lubricating member 32 may also be composed of the porous resin 3. Therefore, this porous resin 3 can be used also for the lubricating member 32 of the bearing device of the electric motor which uses the rotating shaft 21 in the horizontal direction as shown in FIG. 5, and a bearing device which is inexpensive and has an excellent oil recovery function can be obtained. Can be

【００２３】[0023]

【発明の効果】以上、実施の形態での説明からも明らか
なように、請求項１の発明によれば広範な用途を持つ機
能の優れた安価な多孔質樹脂が得られる。As is apparent from the above description of the embodiment, according to the first aspect of the present invention, an inexpensive porous resin having a wide range of uses and excellent functions can be obtained.

【００２４】請求項２の発明によれば、多孔質樹脂を用
いた油回収機能の優れた安価な軸受装置が得られる。According to the second aspect of the present invention, an inexpensive bearing device having an excellent oil recovery function using a porous resin can be obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図１】 実施の形態１の多孔質樹脂の組成を示す説明
図である。FIG. 1 is an explanatory diagram showing a composition of a porous resin according to a first embodiment.

【図２】 実施の形態１の多孔質樹脂の製造工程を示す
説明図である。FIG. 2 is an explanatory diagram illustrating a manufacturing process of the porous resin according to the first embodiment.

【図３】 実施の形態２の軸受装置を示す断面図であ
る。FIG. 3 is a cross-sectional view illustrating a bearing device according to a second embodiment.

【図４】 実施の形態２の軸受装置の油回収部材を拡大
して示す斜視図である。FIG. 4 is an enlarged perspective view showing an oil recovery member of the bearing device according to the second embodiment.

【図５】 実施の形態２の他の軸受装置の断面図であ
る。FIG. 5 is a sectional view of another bearing device according to the second embodiment.

【図６】 従来の軸受装置を示す断面図である。FIG. 6 is a sectional view showing a conventional bearing device.

【符号の説明】[Explanation of symbols]

３ 多孔質樹脂、 ４ 粒体、 ５ 添加材、 ６ 混
合物、 １９ 水、２１ 回転軸、 ２２ 軸受、 ２
３ 保持部材、 ３３ 油回収部材（多孔質樹脂）。3 porous resin, 4 granules, 5 additive, 6 mixture, 19 water, 21 rotating shaft, 22 bearing, 2
3 holding member, 33 oil recovery member (porous resin).

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.⁶ 識別記号 ＦＩ // Ｃ０８Ｌ 23/02 Ｃ０８Ｌ 23/02 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI // C08L 23/02 C08L 23/02

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 オレフィン系の樹脂の粒体と水溶性の微
細な添加材を混合し加熱溶融した後に得られる固体の混
合物から当初添加した前記添加材を水により溶出させて
除去して得られる多孔質樹脂。1. An additive obtained by mixing particles of an olefin-based resin with a water-soluble fine additive and melting the mixture by heating to obtain a solid mixture obtained by eluting the additive initially added with water and removing the additive. Porous resin. 【請求項２】 回転する軸を回転可能に保持する含油素
材により構成した軸受の周囲に潤滑油を含浸させた含油
部材を配設し、この含油部材に前記軸受から流出する潤
滑油を回収して戻す油回収部材を備えた軸受装置であっ
て、その油回収部材を、オレフィン系の樹脂の粒体と水
溶性の微細な添加材を混合し加熱溶融した後に得られる
固体の混合物から当初添加した前記添加材を水により溶
出させて除去して得られる多孔質樹脂により構成したこ
とを特徴とする軸受装置。2. An oil-impregnated member impregnated with lubricating oil is disposed around a bearing made of an oil-impregnated material for rotatably holding a rotating shaft, and the oil-impregnated member collects lubricating oil flowing out of the bearing. A bearing device provided with an oil recovery member, which is initially added from a solid mixture obtained after mixing olefin-based resin granules with a water-soluble fine additive and heating and melting the mixture. A bearing device comprising a porous resin obtained by eluting and removing said additive material with water.