JP5075097B2

JP5075097B2 - Hinge for clean room and door device using the same

Info

Publication number: JP5075097B2
Application number: JP2008298999A
Authority: JP
Inventors: 榮一相田
Original assignee: Nakanishi Industrial Co Ltd
Current assignee: Nakanishi Industrial Co Ltd
Priority date: 2008-11-25
Filing date: 2008-11-25
Publication date: 2012-11-14
Anticipated expiration: 2028-11-25
Also published as: JP2010126878A

Description

本発明は、塵埃が飛散しないようにし高度のクリーン度が要求される場所で好適に使用されるクリーンルーム用丁番（蝶番）に関するものである。
The present invention relates to a hinge for a clean room (hinge) that is suitably used in a place where a high degree of cleanness is required so that dust is not scattered.

精密電子機器、記憶媒体、半導体等の製造工場では、従来のクリーン度より一層高度のクリーンさを要求されているが、扉に使用されている一般的な丁番では微小なダストが発生してしまうので、そのまま使用することができない。すなわち、通常、枠に対して扉を開閉自在に支持する丁番（蝶番）は、枠側に取り付ける板部およびほぼ円筒形状の管部を端縁に有する下羽根と該管部に固着され管部上端面から上方に突出する軸と管部下端に固着された儀星を具備する下羽根組立と、扉側に取り付ける板部およびほぼ円筒形状の管部を端縁に有する上羽根と該管部の上端に固着された儀星を具備する上羽根組立から成り、上記軸を上羽根組立の管部下端から管部内周に回転可能に嵌合している。そして、上記丁番を回動すると、上羽根は軸を回転中心として回転するが、この回転の際、上羽根の管部内周面との間で扉の倒れ荷重を受けた状態で摺動回転する内面摺動部と、上羽根の管部下端面と下羽根の管部上端面の間で扉の荷重を受けた状態で摺動回転する管端摺動部の２箇所を摺動部として、扉は自在に開閉するから、摺動部の摺動抵抗が大きく、摩滅によるダストが発生する。
Manufacturing factories for precision electronic equipment, storage media, semiconductors, etc. require a higher level of cleanliness than conventional cleanliness, but general hinges used for doors generate minute dust. Therefore, it cannot be used as it is. In other words, a hinge (hinge) that normally supports the door so that it can be opened and closed with respect to the frame is fixed to the pipe part and a lower blade having a plate part attached to the frame side and a substantially cylindrical pipe part at the edge. A lower blade assembly comprising a shaft projecting upward from the upper end surface of the member and a star fixed to the lower end of the tube portion, an upper blade having a plate portion attached to the door side and a substantially cylindrical tube portion at the edge, and the tube The upper blade assembly is provided with a star fixed to the upper end of the upper portion, and the shaft is rotatably fitted from the lower end of the tube portion of the upper blade assembly to the inner periphery of the tube portion. When the hinge is rotated, the upper blade rotates about the shaft as the center of rotation. During this rotation, the upper blade slides and rotates in a state of receiving the falling load of the door between the upper blade and the pipe inner peripheral surface. The sliding part is an inner surface sliding part, and a pipe end sliding part that slides and rotates in a state of receiving the load of the door between the lower blade surface of the upper blade and the upper edge surface of the lower blade, Since the door can be freely opened and closed, the sliding resistance of the sliding portion is large, and dust is generated due to abrasion.

上記丁番を構成する上・下羽根等の材質は、一般的にステンレススチールやスチール材料等で作られ、一枚の矩形薄板をせん断し、丸め加工して板部と管部を塑性加工により成形しているから、丸め加工した管部の先端部と板部の間には間隙が生じ、この間隙からダストが外部に飛散するおそれがある。なお、アルミニウム材料を押出し加工して板部と管部を一度に成形する場合はそのような間隙が生じるおそれはないが、重い扉の丁番として使用することはむずかしい。
The upper and lower blades that make up the hinge are generally made of stainless steel or steel material. One rectangular thin plate is sheared and rounded, and the plate and tube are plastic processed. Since it is molded, a gap is generated between the tip portion of the rounded tube portion and the plate portion, and dust may be scattered outside from this gap. In addition, when an aluminum material is extruded and a board part and a pipe part are formed at a time, such a gap does not occur, but it is difficult to use it as a hinge for a heavy door.

一方、クリーンルームで使用する丁番には、摺動部にオイル、グリース等の揮発性成分を含有する潤滑剤を使用できない。そこで、ダストの発生を少なくするよう摺動部に合成樹脂製の軸受を設けた丁番が提案されている（例えば特許文献１参照）。しかし、従来提案されているように、単に合成樹脂製のブッシュやワッシャーを組み合わせただけでは、金属粉塵の飛散を防止できるとしても、樹脂粉塵が外部に飛散するおそれがある。また、ベアリングの周りを環囲部で囲んだ構成も提案されている（例えば特許文献２参照）が、ベアリング部分の外周が開放されているので、ベアリング部分から生じた摩擦粉が落下する際、環囲部の底に落ち込まずに舞い上がって環囲部の上方に飛び出し外部に飛散するおそれがあり、充分とは言えない。環状溝を有するピン受部材を管部の内方に設けて軸から発生したダストを環状溝で捕捉する構成の丁番も知られているが（例えば、特許文献３参照）、上羽根と下羽根の管部の対向面からダストが飛散するおそれがあり、確実に防止できるとは考えられない。

特許第２９５８３０９号公報（特許請求の範囲、段落０００７、図３）特許第４１０８０９８号公報（特許請求の範囲、段落０００６、図２）特開平１０−２８０７８０号公報（特許請求の範囲、段落００１１、図３） On the other hand, the hinge used in the clean room cannot use a lubricant containing volatile components such as oil and grease in the sliding portion. In view of this, there has been proposed a hinge provided with a synthetic resin bearing on the sliding portion so as to reduce the generation of dust (see, for example, Patent Document 1). However, as conventionally proposed, merely combining a synthetic resin bush or washer may prevent the metal dust from being scattered to the outside, even though the metal dust can be prevented from scattering. Further, a configuration in which the periphery of the bearing is surrounded by an encircling portion has been proposed (see, for example, Patent Document 2), but since the outer periphery of the bearing portion is open, when the friction powder generated from the bearing portion falls, There is a risk that it will fly up without falling to the bottom of the surrounding part and jump out of the surrounding part and scatter outside, which is not sufficient. A hinge having a structure in which a pin receiving member having an annular groove is provided inward of the pipe portion and dust generated from the shaft is captured by the annular groove is known (for example, see Patent Document 3). Dust may scatter from the opposing surface of the blade tube portion, and it is not considered that it can be reliably prevented.

Japanese Patent No. 2958309 (Claims, paragraph 0007, FIG. 3) Japanese Patent No. 4108098 (Claims, paragraph 0006, FIG. 2) Japanese Patent Laid-Open No. 10-280780 (Claims, paragraph 0011, FIG. 3)

本発明の解決課題は、上記のように高度のクリーン度を要求されるクリーンルーム用の丁番において、回動に伴う金属粉末や合成樹脂粉末等の微細なダストが周囲に飛散しないようにしたクリーンムール用丁番を提供することである。 The problem to be solved by the present invention is a clean room hinge that requires a high degree of cleanliness as described above, in which fine dust such as metal powder and synthetic resin powder accompanying rotation is prevented from being scattered around. It is to provide a hinge for mussels.

本発明によれば、端縁に管部を形成した一対の羽根と、上下に組み合わせた各羽根の管部に連通する軸を有し、該軸を回転中心として上記羽根が回動するようにした丁番において、上記各羽根の対向する管部の端面に合成樹脂製の上軸受と下軸受を密着して設け、各軸受を摺接状態で当接し、下軸受の内周面の上部に切欠き部を設けて軸との間に空所を形成するとともに下軸受の外周面の外側に受溝部を形成するよう外周部との間に間隙を存して上方に起立する外周壁を形成し、上軸受の外周面に上記下軸受の受溝部に入り込み該下軸受と上軸受の摺接面を越えて下軸受の外周面に沿って下方に延びる被覆壁を設けたクリーンルーム用丁番が提供され、上記課題が解決される。
According to the present invention, a pair of blades each having a tube portion formed at an edge thereof and a shaft communicating with the tube portions of the blades combined in the vertical direction are arranged so that the blade rotates around the shaft. In the hinge, the upper and lower bearings made of synthetic resin are provided in close contact with the end faces of the pipe portions facing each of the blades, and the bearings are in sliding contact with each other and are placed on the upper part of the inner peripheral surface of the lower bearing. A notch is provided to form a space between the shaft and an outer peripheral wall that rises upward with a gap between the outer periphery and a receiving groove on the outer surface of the lower bearing. And a clean room hinge having a covering wall that extends into the receiving groove portion of the lower bearing on the outer peripheral surface of the upper bearing and extends downward along the outer peripheral surface of the lower bearing beyond the sliding contact surface of the lower bearing and the upper bearing. Provided to solve the above problems.

また、本発明によれば、上記被覆壁の先端は上記受溝部の底部に接しておらず、上記外周壁の下方には下羽根の管部に沿って下方に延びる嵌合壁が形成された上記クリーンルーム用丁番、外周壁の上部に上羽根の管部外周に形成した環状凹部に非接触状態で近接する突縁が設けられた上記クリーンルーム用丁番、及び上記軸を管部内周面に嵌合する大径部と管部内周面から離れた小径部に形成し、上記上軸受と下軸受の内周面に小径部と管部内周面間に嵌合する内方筒部を形成した上記クリーンルーム用丁番提供され、上記課題が解決される。 According to the present invention, the tip of the covering wall is not in contact with the bottom of the receiving groove portion, and a fitting wall extending downward along the tube portion of the lower blade is formed below the outer peripheral wall. The hinge for the clean room, the hinge for the clean room provided with a protruding edge adjacent to the annular recess formed on the outer periphery of the upper blade on the outer peripheral wall in a non-contact state, and the shaft on the inner peripheral surface of the pipe A large diameter part to be fitted and a small diameter part away from the inner peripheral surface of the pipe part are formed, and an inner cylindrical part to be fitted between the small diameter part and the inner peripheral surface of the pipe part is formed on the inner peripheral surfaces of the upper bearing and the lower bearing. The hinge for the clean room is provided, and the above problem is solved.

本発明は上記のように構成され、管部に軸を挿通して上羽根と下羽根を開閉可能に組み合わせた丁番において、上記各羽根の対向する管部の端面に合成樹脂製の上軸受と下軸受を密着して設け、各軸受を摺接状態で当接し、下軸受の内周面の上部に切欠き部を設けて空所を形成するとともに下軸受の外周面の外側に受溝部を形成するよう外周部との間に間隙を存して上方に起立する外周壁を形成し、上軸受の外周面に上記下軸受の受溝部に入り込み該下軸受と上軸受の摺接面を越えて下軸受の外周面に沿って下方に延びる被覆壁を設けたから、羽根の回転により生じた管部内の摩滅粉等のダストは下軸受の切欠き部によって形成された軸との間の空所に蓄積されて管部の外方に殆ど逸散されることがない。また上軸受と下軸受の摺接面から生じる合成樹脂粉等のダストのうち内周方向に向かったダストは上記軸との間の空所に収納され、外周方向に向かったダストは下軸受の外周に形成した受溝部内に落下して収納される。この際、上記摺接面の外周を被覆壁で覆ったので、摺接面から落下するダストが周囲に飛散しにくく、かつ落下する場合にダストは下軸受の外周面と被覆壁の内周面の間の狭い空間を通して確実に受溝部の底部に案内されるから、一層飛散しにくくすることができる。このようにして、本発明の丁番は、使用により生じるダストを二段階に捕捉して外部に飛散しないようにすることができる。
The present invention is configured as described above, and is a hinge in which an upper blade and a lower blade are combined to be opened and closed by inserting a shaft into the tube portion, and an upper bearing made of a synthetic resin on the end surface of the tube portion facing each of the blades And the lower bearings are in close contact with each other, and the bearings are in sliding contact with each other. A notch is provided in the upper part of the inner peripheral surface of the lower bearing to form a void, and a receiving groove portion on the outer side of the outer peripheral surface of the lower bearing. An outer peripheral wall that stands upward with a gap between the outer peripheral portion and the outer peripheral portion is formed to enter the receiving groove portion of the lower bearing on the outer peripheral surface of the upper bearing, and the sliding contact surface of the lower bearing and the upper bearing is formed. Since a coating wall extending downward along the outer peripheral surface of the lower bearing is provided, dust such as abrasion powder in the pipe portion caused by the rotation of the blades is emptied between the shaft formed by the notch portion of the lower bearing. Accumulated in the area and hardly dissipated outside the pipe. Of the dust such as synthetic resin powder generated from the sliding contact surfaces of the upper and lower bearings, the dust facing the inner circumference is stored in a space between the shaft and the dust facing the outer circumference is stored in the lower bearing. It is dropped and stored in a receiving groove formed on the outer periphery. At this time, since the outer periphery of the sliding contact surface is covered with the covering wall, the dust falling from the sliding contact surface is not easily scattered to the surroundings, and when falling, the dust is separated from the outer peripheral surface of the lower bearing and the inner peripheral surface of the covering wall. Since it is reliably guided to the bottom part of the receiving groove part through the narrow space between, it can be made more difficult to scatter. In this way, the hinge of the present invention can capture dust generated by use in two stages and prevent it from being scattered outside.

また、外周壁の下方に下羽根の管部に沿って延びる嵌合壁を形成したので、上記受溝部を形成する外周壁の強度を高めることができ、該外周壁の先端に上羽根の外周に形成した環状凹部に非接触状態で近接する突縁を設けると、上記受溝部の上方の開口部を閉鎖的に形成することができるので、被覆壁と協働して一層ダストの飛散を防止することができ、場合によっては上記被覆壁を設けなくてもダストの飛散を防止することができる。
In addition, since the fitting wall extending along the tube portion of the lower blade is formed below the outer peripheral wall, the strength of the outer peripheral wall forming the receiving groove portion can be increased, and the outer periphery of the upper blade is formed at the tip of the outer peripheral wall. By providing a projecting edge close to the annular recess formed in a non-contact state, the opening above the receiving groove can be closed, thus preventing dust from further scattering in cooperation with the coating wall In some cases, dust scattering can be prevented without providing the covering wall.

なお、上記軸を大径部と小径部に形成し、大径部を管部内周面に固定し、上記小径部に嵌合するよう上記各軸受に内方筒部を形成して嵌め合わせれば、金属材料で構成された軸と管部の摺動部を少なくし、摩滅粉の発生を少なくし、一層ダストの逸散を防止したクリーンルーム用の丁番が得られる。 If the shaft is formed into a large-diameter portion and a small-diameter portion, the large-diameter portion is fixed to the inner peripheral surface of the pipe portion, and an inner cylindrical portion is formed and fitted to each bearing so as to be fitted into the small-diameter portion. A hinge for a clean room is obtained in which the sliding portion between the shaft and the tube portion made of a metal material is reduced, the generation of abrasion powder is reduced, and dust is further prevented from escaping.

本発明のクリーンルーム用の丁番は、精密電子機器、記憶媒体、半導体等の製造工場その他の各種クリーンルームの扉やクリーン機器の開閉蓋その他適宜の機構の適所に適用することができる。図１〜図５を参照し、本発明の丁番は、それぞれ板部３，４の端縁に管部５，６を形成した上羽根１と下羽根２から成る一対の羽根と、この上羽根１と下羽根２を上下に組み合わせて上記管部５，６に連通した軸７を具備している。図に示す実施例において、該軸７の基端は下羽根２の管部６に図示を省略した溶接、圧入、ピン等で固定され、先端が管部６から上方に突出し、この突出部に上羽根１の管部５が回転可能に挿入され、軸７を回転中心として羽根が回動する。
The hinge for a clean room according to the present invention can be applied to a proper place of a precision electronic device, a storage factory for a semiconductor, a various other clean room, an open / close lid of a clean device, and other appropriate mechanisms. Referring to FIGS. 1 to 5, the hinge of the present invention includes a pair of blades composed of an upper blade 1 and a lower blade 2 formed with pipe portions 5 and 6 at the edges of the plate portions 3 and 4, respectively. A shaft 7 communicating with the pipe portions 5 and 6 is provided by combining the blade 1 and the lower blade 2 up and down. In the embodiment shown in the figure, the base end of the shaft 7 is fixed to the pipe portion 6 of the lower blade 2 by welding, press fitting, pins, etc. (not shown), and the tip protrudes upward from the pipe portion 6. The tube portion 5 of the upper blade 1 is rotatably inserted, and the blade rotates around the shaft 7 as a rotation center.

上記下羽根２の板部４には、枠側に取り付けるための取付孔８が形成され、上羽根１の板部３には扉側に取り付けるための取付孔９が形成され、各羽根１，２の管部端には儀星１０が嵌着され、管部内が密閉されている。なお、上記各羽根１，２や軸７は金属材料で構成されるが、各羽根をステンレススチール材料やスチール材料で塑性加工する場合には、図３、図４に示すように管部と板部の間隙からダストが逸散しないよう間隙部分を溶接、ロー付け、半田付け、或いは接着剤等の閉鎖部材１１で塞いでおく。アルミニウム材料で押出成形する場合にはそのような間隙が生じないので、その必要はない。
An attachment hole 8 for attachment to the frame side is formed in the plate portion 4 of the lower blade 2, and an attachment hole 9 for attachment to the door side is formed in the plate portion 3 of the upper blade 1. A star 10 is fitted to the end of the tube portion 2 to seal the inside of the tube portion. The blades 1 and 2 and the shaft 7 are made of a metal material. However, when plastically machining each blade with a stainless steel material or a steel material, as shown in FIGS. The gap portion is closed with a closing member 11 such as welding, brazing, soldering, or adhesive so that dust does not escape from the gap between the portions. In the case of extrusion molding with an aluminum material, such a gap does not occur, and this is not necessary.

上記上羽根１と下羽根２の上下に対向する管部５、６の端面にはそれぞれ合成樹脂製の上軸受１２と下軸受１３が密着状態で設けられ、各軸受１２，１３は摺接状態で当接している。該合成樹脂材料としては、耐摩耗性のある機械的強度の高い適宜の材料が選択される。上軸受１２の上面１４及び下軸受１３の下面１５は扉の荷重により各管部５，６の端面に密着しているが、接着剤で接着してもよい。
Synthetic resin upper bearings 12 and lower bearings 13 are provided in close contact with the upper and lower ends of the pipe portions 5 and 6 facing the upper and lower blades 1 and 2, respectively, and the bearings 12 and 13 are in sliding contact. In contact. As the synthetic resin material, an appropriate material having wear resistance and high mechanical strength is selected. The upper surface 14 of the upper bearing 12 and the lower surface 15 of the lower bearing 13 are in close contact with the end surfaces of the pipe portions 5 and 6 due to the load of the door, but may be bonded with an adhesive.

図５〜図８を参照し、下軸受１３は、中央に挿通孔１６を有する略円筒状に形成され、上記軸７に軽圧入による嵌合若しくは接着される内周面１７を有し、この内周面１７の上部には面取り等により形成される切欠き部１８を設けてある。この切欠き部は上方に開口し、通常の面取り加工よりも大きく形成するのが好ましい。下軸受１３の上面には摺接面１９が形成され、下面１５は上述したように管部６に圧着若しくは接着される。また、外周面２０の外側には、受溝部２１を形成するよう外周面２０との間に間隙を存して上方に起立する外周壁２２が設けられ、該外周壁２２の下方には上記下羽根２の管部６に沿って延びる嵌合壁２３が形成されている。この外周壁２２の内面面２４と上記上羽根１の管部５の外周面間には、両者が接触しない程度の間隔が設けられている。
Referring to FIGS. 5 to 8, the lower bearing 13 is formed in a substantially cylindrical shape having an insertion hole 16 in the center, and has an inner peripheral surface 17 that is fitted or bonded to the shaft 7 by light press fitting. A cutout portion 18 formed by chamfering or the like is provided on the inner peripheral surface 17. The notch is preferably opened upward and formed larger than a normal chamfering process. A sliding contact surface 19 is formed on the upper surface of the lower bearing 13, and the lower surface 15 is pressure-bonded or bonded to the tube portion 6 as described above. Further, an outer peripheral wall 22 is provided outside the outer peripheral surface 20 so as to form a receiving groove portion 21 with a gap between the outer peripheral surface 20 and the outer peripheral wall 20. A fitting wall 23 extending along the tube portion 6 of the blade 2 is formed. Between the inner surface 24 of the outer peripheral wall 22 and the outer peripheral surface of the tube portion 5 of the upper blade 1, an interval is provided so that they are not in contact with each other.

上記上軸受１２は、中央に挿通孔２５を有する略円板状に形成され、上記軸７に回転可能に摺接する内周面２６を有し、下面には上記下軸受１３の摺接面１９と摺接する摺接面２７が形成され、上面１４は上述したように管部５に圧着若しくは接着される。また、上軸受１２の外周面２８には、上記下軸受１３の受溝部２１に先端が入り込み上記下軸受１３と上軸受１２の摺接面１９，２７を越えて下軸受１３の外周面２０に沿って下方に延びる被覆壁２９が一連に形成されている。該被覆壁２９の先端は上記受溝部２１の底部に接触しない長さである。なお、該被覆壁２９の内周面３０は上記下軸受１３の外周面２０に接触していてもいいし、該外周面２０との間に隙間があってもよい。また、該被覆壁２９の外周面３１と上記下軸受１３の外周壁２２の内面面２４との間には、両者が接触しない程度の間隔が形成されている。
The upper bearing 12 is formed in a substantially disk shape having an insertion hole 25 in the center, has an inner peripheral surface 26 that is slidably contacted with the shaft 7, and a lower surface of the slidable contact surface 19 of the lower bearing 13. The upper surface 14 is pressure-bonded or bonded to the tube portion 5 as described above. In addition, the tip of the outer bearing 28 of the upper bearing 12 enters the receiving groove portion 21 of the lower bearing 13, and the outer peripheral surface 20 of the lower bearing 13 extends beyond the sliding contact surfaces 19 and 27 of the lower bearing 13 and the upper bearing 12. A covering wall 29 extending downward is formed in series. The tip of the covering wall 29 has a length that does not contact the bottom of the receiving groove 21. In addition, the inner peripheral surface 30 of the covering wall 29 may be in contact with the outer peripheral surface 20 of the lower bearing 13, or a gap may be formed between the inner peripheral surface 30 and the outer peripheral surface 20. Further, an interval is formed between the outer peripheral surface 31 of the covering wall 29 and the inner surface 24 of the outer peripheral wall 22 of the lower bearing 13 so that they do not contact each other.

上記の構成により上羽根１の管部５と軸７との回動による摩耗粉は、上羽根１の管部５の嵌合隙間から下方に落下する。一方、上軸受１２の上面１４は上羽根１の管部５の下端面との間で扉の荷重を受けて密着しており、内周面２６は軸７の外周面に回動自在に摺動するよう嵌合している。したがって、上方から落下した摩耗粉は一部が上軸受１２の内周面２６と軸７の外周面の間から下軸受１３と軸７の間に落ち込み、上記切欠き部１８により形成された空所（凹部）３２に溜まる。
With the configuration described above, the abrasion powder caused by the rotation of the tube portion 5 of the upper blade 1 and the shaft 7 falls downward from the fitting gap of the tube portion 5 of the upper blade 1. On the other hand, the upper surface 14 of the upper bearing 12 is in close contact with the lower end surface of the tube portion 5 of the upper blade 1 under the load of the door, and the inner peripheral surface 26 is slidably rotatable on the outer peripheral surface of the shaft 7. It is fitted to move. Therefore, a part of the wear powder dropped from above falls between the inner peripheral surface 26 of the upper bearing 12 and the outer peripheral surface of the shaft 7 and between the lower bearing 13 and the shaft 7, and the void formed by the notch 18. It collects in the place (concave part) 32.

上記上軸受１２の下面の摺接面２７と上記下軸受１３の上面の摺接面１９は扉の荷重を受けた状態で回動するため密着しているが、この間で発生する摩耗粉は軸受１２，１３の内周面および外周面方向に徐徐に排出され、内周面方向に向かった摩耗粉は上記空所（凹部）３２に溜まり、外周面方向に向かった摩耗粉は上記被覆壁２９により直接外方に拡散することなく、該被覆壁２９の内周面３０と下軸受１３の外周面２０の間を通って上記受溝部２１の下方に溜まり、外部に飛散することはない。このようにして、上記丁番は二段階にダストを捕捉するように構成されているので、ダストの飛散が確実に防止され、安心して使用することができる。
The slidable contact surface 27 on the lower surface of the upper bearing 12 and the slidable contact surface 19 on the upper surface of the lower bearing 13 are in close contact with each other because they rotate under the load of the door. 12 and 13 are gradually discharged in the direction of the inner peripheral surface and the outer peripheral surface, and the wear powder directed toward the inner peripheral surface is accumulated in the void (recess) 32, and the wear powder directed toward the outer peripheral surface is collected in the covering wall 29. Therefore, it does not directly diffuse outward, passes between the inner peripheral surface 30 of the covering wall 29 and the outer peripheral surface 20 of the lower bearing 13 and accumulates below the receiving groove portion 21 and does not scatter outside. In this way, the hinge is configured to capture dust in two stages, so dust scattering is reliably prevented and can be used with confidence.

上記実施例は軸７の太さが一様であったが、管部内周面に嵌合する大径部３３と管部内周面から離れている小径部３４に形成してもよい。図９はそのような実施例を示し、軸７の大径部３３は下羽根２の管部６に固定され、小径部３４は上方に突出している。上記上軸受１２および下軸受１３の内周面には上記小径部３４と管部内周面間に嵌合する内方筒部３５，３６が形成されている。このような構成によれば、軸７と管部５，６間の摺動部が少なくなるので、摩耗粉の発生を少なくすることができる。
Although the thickness of the shaft 7 is uniform in the above embodiment, the shaft 7 may be formed in the large diameter portion 33 fitted to the inner peripheral surface of the tube portion and the small diameter portion 34 separated from the inner peripheral surface of the tube portion. FIG. 9 shows such an embodiment, in which the large-diameter portion 33 of the shaft 7 is fixed to the tube portion 6 of the lower blade 2 and the small-diameter portion 34 protrudes upward. Inner cylindrical portions 35 and 36 are formed on the inner peripheral surfaces of the upper bearing 12 and the lower bearing 13 to fit between the small diameter portion 34 and the inner peripheral surface of the pipe portion. According to such a structure, since the sliding part between the shaft 7 and the pipe parts 5 and 6 decreases, generation | occurrence | production of abrasion powder can be decreased.

図１０は、他の実施例を示している。図において上軸受１２は上記実施例と同じであるが、下軸受１３の外周壁２２と上羽根１の管部５の関係が相違している。すなわち、上記上羽根１の管部外周に環状の凹部３７を設け、外周壁２２の先端に該環状凹部３７に向かって非接触状態で近接する突縁３８を形成している。このように構成すると、外周壁２２の先端突縁３８と環状凹部３７により受溝部２１内に溜まったダストの外部への流出が一層妨げられ、効果的である。また、この実施例においても、図１１に示すように軸７を大径部３３と小径部３４に形成してもよい。さらに、摩耗粉の発生が比較的少ない場合等には、図１２に示すように、上記下軸受１３の被覆壁２９を省略して先端突縁３８と環状凹部３７により拡散を防止するようにすることもできる。 FIG. 10 shows another embodiment. In the figure, the upper bearing 12 is the same as the above embodiment, but the relationship between the outer peripheral wall 22 of the lower bearing 13 and the tube portion 5 of the upper blade 1 is different. That is, an annular recess 37 is provided on the outer periphery of the pipe portion of the upper blade 1, and a protruding edge 38 is formed at the tip of the outer peripheral wall 22 in a non-contact state toward the annular recess 37. If comprised in this way, the outflow to the exterior of the dust collected in the receiving groove part 21 by the front-end | tip protrusion 38 and the annular recessed part 37 of the outer peripheral wall 22 will be prevented further, and it is effective. Also in this embodiment, the shaft 7 may be formed in the large diameter portion 33 and the small diameter portion 34 as shown in FIG. Further, when the generation of wear powder is relatively small, etc., as shown in FIG. 12, the covering wall 29 of the lower bearing 13 is omitted to prevent the tip protrusion 38 and the annular recess 37 from diffusing. You can also.

本発明の一実施例を示す丁番の正面図。The front view of the hinge which shows one Example of this invention. 図１の平面図。The top view of FIG. 羽根の平面図。The top view of a blade | wing. 羽根の一部の正面図。The front view of a part of feather. 管部に沿った断面図を示し、Ａは縦断面図、ＢはＡ図のＢ部拡大断面図。Sectional drawing along a pipe part is shown, A is a longitudinal cross-sectional view, B is the B section expanded sectional view of A figure. 下軸受を示し、Ａは断面図、Ｂは底面図。A lower bearing is shown, A is a sectional view, and B is a bottom view. 上軸受を示しＡは断面図、Ｂは底面図。An upper bearing is shown, A is a sectional view, and B is a bottom view. 下軸受と上軸受を組み合わせた状態に断面図。Sectional drawing in the state which combined the lower bearing and the upper bearing. 他の実施例を示す断面図。Sectional drawing which shows another Example. さらに他の実施例を示す断面図。Sectional drawing which shows another Example. さらに他の実施例を示す断面図。Sectional drawing which shows another Example. さらに他の実施例を示す断面図。Sectional drawing which shows another Example.

符号の説明Explanation of symbols

１上羽根
２下羽根
５，６管部
７軸
１０儀星
１２上軸受
１３下軸受
１９、２７摺動面
２１受溝部
２２外周壁
２３嵌合壁
２９被覆壁
３２空所（凹部）
３３大径部
３４小径部
３５，３６内方筒部
３７環状凹部
３８突縁 DESCRIPTION OF SYMBOLS 1 Upper blade 2 Lower blade 5, 6 Pipe part 7 Axis 10 Star 12 Upper bearing 13 Lower bearing 19, 27 Sliding surface 21 Receiving groove part 22 Outer peripheral wall 23 Fitting wall 29 Covering wall 32 Space (concave part)
33 Large-diameter portion 34 Small-diameter portions 35 and 36 Inner cylindrical portion 37 Annular recess 38 Projection edge

Claims

端縁に管部を形成した一対の羽根と、上下に組み合わせた各羽根の管部に連通する軸を有し、該軸を回転中心として上記羽根が回動するようにした丁番において、上記各羽根の対向する管部の端面に合成樹脂製の上軸受と下軸受を密着して設け、各軸受を摺接状態で当接し、下軸受の内周面の上部に切欠き部を設けて軸との間に空所を形成するとともに下軸受の外周面の外側に受溝部を形成するよう外周部との間に間隙を存して上方に起立する外周壁を形成し、上軸受の外周面に上記下軸受の受溝部に入り込み該下軸受と上軸受の摺接面を越えて下軸受の外周面に沿って下方に延びる被覆壁を設けたクリーンルーム用丁番。
In the hinge having a pair of blades each having a tube portion formed at the end edge and a shaft communicating with the tube portion of each blade combined vertically, the blade is rotated about the shaft as a rotation center. The upper and lower bearings made of synthetic resin are provided in close contact with the end faces of the pipes facing each blade, the bearings are in sliding contact with each other, and a notch is provided in the upper part of the inner peripheral surface of the lower bearing. A space is formed between the shaft and the outer peripheral wall of the lower bearing so as to form a receiving groove on the outer surface of the lower bearing. A hinge for a clean room provided with a covering wall that enters the receiving groove portion of the lower bearing on the surface and extends downward along the outer peripheral surface of the lower bearing beyond the sliding contact surface of the lower bearing and the upper bearing.

上記軸は下羽根の管部に固定され、上羽根と下羽根の管部端には儀星が嵌着され、上軸受は内周面が回転可能に上記軸に摺接していることを特徴とする請求項１に記載のクリーンルーム用丁番。
The shaft is fixed to the tube portion of the lower blade, a star is fitted to the upper blade and the tube portion of the lower blade, and the upper bearing is in sliding contact with the shaft so that the inner peripheral surface thereof can rotate. The hinge for a clean room according to claim 1.

上記被覆壁の先端は上記受溝部の底部に接していない請求項１または２に記載のクリーンルーム用丁番。
The hinge for a clean room according to claim 1 or 2, wherein a tip of the covering wall is not in contact with a bottom of the receiving groove.

上記外周壁の下方には下羽根の管部に沿って下方に延びる嵌合壁が形成されている請求項１から３のいずれかに記載のクリーンルーム用丁番。
The hinge for a clean room according to any one of claims 1 to 3, wherein a fitting wall extending downward along the tube portion of the lower blade is formed below the outer peripheral wall.

上記上羽根の管部外周には環状の凹部が形成され、外周壁の先端には該環状凹部に向かって非接触状態で近接する突縁が形成されている請求項１から４のいずれかに記載のクリーンルーム用丁番。
5. An annular recess is formed on the outer periphery of the tube portion of the upper blade, and a protruding edge is formed at the tip of the outer peripheral wall in a non-contact state toward the annular recess. The clean room hinge described.

上記軸は管部内周面に嵌合する大径部と管部内周面から離れている小径部に形成され、上記上軸受および下軸受の内周面には上記小径部と管部内周面間に嵌合する内方筒部が形成されている請求項１から５のいずれかに記載のクリーンルーム用丁番。
The shaft is formed in a large diameter portion that fits into the inner peripheral surface of the pipe portion and a small diameter portion that is separated from the inner peripheral surface of the pipe portion, and the inner peripheral surfaces of the upper bearing and the lower bearing are between the small diameter portion and the inner peripheral surface of the pipe portion. A hinge for a clean room according to any one of claims 1 to 5, wherein an inner cylindrical portion to be fitted to the inner wall is formed.

端縁に管部を形成した一対の羽根と、上下に組み合わせた各羽根の管部に連通する軸を有し、該軸を回転中心として上記羽根が回動するようにした丁番において、上記各羽根の対向する管部の端面に合成樹脂製の上軸受と下軸受を密着して設け、各軸受を摺接状態で当接し、下軸受の内周面の上部に切欠き部を形成するとともに下軸受の外周面の外側に受溝部を形成するよう外周部との間に間隙を存して上方に起立する外周壁を形成し、上記上羽根の管部外周に環状の凹部を設け、上記外周壁の先端に該環状凹部に向かって非接触状態で近接する突縁を形成したことを特徴とするクリーンルーム用丁番。
In the hinge having a pair of blades each having a tube portion formed at the end edge and a shaft communicating with the tube portion of each blade combined vertically, the blade is rotated about the shaft as a rotation center. Synthetic resin upper bearings and lower bearings are provided in close contact with the end faces of the pipes facing each blade, and the bearings are in sliding contact with each other to form a notch at the upper part of the inner peripheral surface of the lower bearing. And forming an outer peripheral wall that rises upward with a gap between the outer peripheral portion and the outer peripheral surface of the lower bearing so as to form a receiving groove portion. A hinge for a clean room, characterized in that a projecting edge is formed at the tip of the outer peripheral wall in a non-contact state toward the annular recess.

上記請求項１から７のいずれかに記載のクリーンルーム用丁番を具備する扉装置。 A door device comprising the clean room hinge according to any one of claims 1 to 7.