JP6483562B2

JP6483562B2 - Seal ring

Info

Publication number: JP6483562B2
Application number: JP2015152349A
Authority: JP
Inventors: 政徳藤井; 賢一木津
Original assignee: Mitsubishi Cable Industries Ltd
Current assignee: Mitsubishi Cable Industries Ltd
Priority date: 2015-07-31
Filing date: 2015-07-31
Publication date: 2019-03-13
Anticipated expiration: 2035-07-31
Also published as: JP2017032065A

Description

本発明は、シールリングに関する。 The present invention relates to a seal ring.

従来、円周１箇所に切れ目を有する略円環状の全体形状を有し、リング本体と、このリング本体の両端部から周方向へ突出した第１凸部と第２凸部を有し、圧縮機の可動スクロールとハウジングの間のシールを行うシールリングは、公知であり、その材質はＰＴＦＥ（ポリテトラフルオロエチレン）が主として使用されている（例えば、特許文献１，特許文献２参照）。 Conventionally, it has a generally annular overall shape with a cut at one circumference, has a ring main body, a first convex part and a second convex part that protrude in the circumferential direction from both ends of the ring main body, and is compressed A seal ring for sealing between the movable scroll of the machine and the housing is known, and the material thereof is mainly PTFE (polytetrafluoroethylene) (see, for example, Patent Document 1 and Patent Document 2).

特開２００７−２４７５２６号公報JP 2007-247526 A 特開平８−２７６５０８号公報JP-A-8-276508

従来のこの種のシールリングは、円筒状のＰＴＦＥ素材を、まず、機械的に輪切りし、次いで、切削・研削・切断加工等の機械加工によって、製造していた。
従って、従来のものは、機械加工等の加工工数が掛かり、材料ロスも多く発生し、製造コストも割高となる欠点があった。 A conventional seal ring of this type has been manufactured by first mechanically cutting a cylindrical PTFE material and then machining such as cutting, grinding, and cutting.
Therefore, the conventional ones have the disadvantages that the number of processing steps such as machining is increased, the material loss is increased, and the manufacturing cost is high.

一方、射出成形による製造もありえるが、その場合、第１凸部と第２凸部の合せ目部位における密封性が低下し、この合せ目部位からの流体（オイル）の漏れ量が過大となるという欠点があった。揺動試験においては、ＰＴＦＥ製シールリングと比較して流体（オイル）漏洩量が顕著に過大となることが確認された。シール部位からの流体漏洩が極端に増大することは圧縮機の機能上好ましくない。
そこで、本発明者は、樹脂材質をＰＴＦＥ以外のものとすると共に、上記合せ目部位からの流体の漏れ量を減少させる第１凸部と第２凸部の形状等につき、多大な研究開発努力を続けている。 On the other hand, manufacturing by injection molding is possible, but in that case, the sealing performance at the joint portion of the first convex portion and the second convex portion is lowered, and the amount of fluid (oil) leakage from the joint portion is excessive. There was a drawback. In the rocking test, it was confirmed that the amount of fluid (oil) leakage was significantly larger than that of the PTFE seal ring. It is not preferable from the viewpoint of the function of the compressor that the fluid leakage from the seal portion is extremely increased.
Accordingly, the present inventor made a great amount of research and development efforts on the shape of the first and second protrusions that reduce the amount of fluid leakage from the joint portion, while making the resin material other than PTFE. Continue.

ところで、リング本体に比較すれば、第１凸部と第２凸部の大きさは極めて小さいが故に、上記圧縮機に組込む（装着する）際、作業者が上下（表裏）逆に組込む―――誤装着してしまう―――虞がある。上記研究開発努力によって、微妙な形状・寸法等の特別なアイデア（新技術）を、上記第１凸部と第２凸部に付与したとしても、圧縮機への組込み作業に於て、誤装着（組込ミス）を行っては、流体漏洩が急増する結果となる。 By the way, since the size of the first and second protrusions is extremely small compared to the ring body, when installing (attaching) to the compressor, the operator installs it upside down (front and back). -Wrong wearing-There is a risk. Even if a special idea (new technology) such as a subtle shape / dimension is given to the first and second convex parts by the above research and development efforts, it is installed incorrectly in the compressor. Performing (installation mistake) results in a rapid increase in fluid leakage.

そこで、本発明は、シールリングの組込作業における誤装着を、確実に防止することを目的とする。特に、スクロール運動を行う圧縮機へのシールリング組込作業における組込ミスを、簡易な構成にて有効防止することを目的とする。 Accordingly, an object of the present invention is to reliably prevent erroneous mounting in the assembly work of the seal ring. In particular, it is an object to effectively prevent a mistake in assembling a seal ring into a compressor that performs a scrolling motion with a simple configuration.

本発明に係るシールリングは、円周１箇所に切れ目を有する円環状であって、リング本体と、該リング本体の第１端部・第２端部から周方向に延伸状の第１凸部・第２凸部とを有し、さらに、直交する二つの被密封面にて形成される隅部に配設されて上記被密封面に圧接して密封作用をなすシールリングに於て、直交する二つの上記被密封面に対向する密封用対向領域を除外した非対向領域に、誤装着防止用目印を有し、上記誤装着防止用目印は、周方向に所定ピッチで散点状に配設した有底孔から成り、散点状の上記有底孔を有するシールリング全体が熱可塑性樹脂組成物にて射出成形されているものである。
また、本発明に係るシールリングは、円周１箇所に切れ目を有する円環状であって、リング本体と、該リング本体の第１端部・第２端部から周方向に延伸状の第１凸部・第２凸部とを有し、さらに、直交する二つの被密封面にて形成される隅部に配設されて上記被密封面に圧接して密封作用をなすシールリングに於て、直交する二つの上記被密封面に対向する密封用対向領域を除外した非対向領域に、誤装着防止用目印を有し、上記誤装着防止用目印は、周方向に所定ピッチで散点状に配設した小凹窪部から成り、散点状の上記小凹窪部を有するシールリング全体が熱可塑性樹脂組成物にて射出成形されているものである。 The seal ring according to the present invention is an annular shape having a cut at one place on the circumference, the ring main body, and a first convex portion extending in the circumferential direction from the first end and the second end of the ring main body. -In a seal ring having a second convex portion and further arranged in a corner formed by two sealed surfaces orthogonal to each other and pressed against the sealed surface to form a sealing action The non-opposing area excluding the sealing opposed areas facing the two sealed surfaces is provided with an erroneous mounting prevention mark, and the erroneous mounting prevention mark is arranged in a dotted pattern at a predetermined pitch in the circumferential direction. The whole seal ring which consists of the provided bottomed hole and has the dotted bottomed hole is injection-molded with a thermoplastic resin composition .
Further, the seal ring according to the present invention is an annular shape having a cut at one place on the circumference, and the ring main body and the first end extending in the circumferential direction from the first end and the second end of the ring main body. In a seal ring having a convex portion and a second convex portion, and further disposed in a corner formed by two orthogonally sealed surfaces to be in pressure contact with the sealed surface to form a sealing action In addition, a non-facing area is provided in a non-facing area excluding a sealing facing area facing the two surfaces to be sealed that are orthogonal to each other, and the mismounting prevention marks are scattered at a predetermined pitch in the circumferential direction. It consists small recessed portion which is arranged to, in which the whole sealing ring having a scattered point-like manner of the small recessed portion is molded out morphism Te in the thermoplastic resin composition.

本発明によれば、誤装着防止用目印を作業者が確認して、直交する二つの被密封面にて形成された隅部に対して、正常なシールリングの姿勢をもって、間違い（ミス）なく組込むことができる。
そして、誤装着防止用目印は、密封用対向領域には存在せず、シールリングの機能面（シール性能）への影響は全くない。 According to the present invention, a mark for erroneous mounting prevention check worker, with respect to the corner portion formed by two of the tightly sealing surface orthogonal, with the orientation of the normal seal ring, mistakes (mistakes) without Can be incorporated.
In addition, the mark for preventing erroneous mounting does not exist in the opposing area for sealing, and there is no influence on the functional surface (seal performance) of the seal ring.

本発明に係るシールリングを組込んだ圧縮機断面図である。It is a compressor sectional view incorporating a seal ring concerning the present invention. 本発明の実施の一形態を示し、装着状態の拡大断面図である。1 shows an embodiment of the present invention and is an enlarged cross-sectional view in a mounted state. FIG. 切れ目開状態を示す平面図である。It is a top view which shows a break open state. （後方部位を一部省略して図示した）切れ目開状態の正面図である。It is a front view of a cut open state (illustrated with a part of the rear portion omitted). 切れ目閉状態の底面図である。It is a bottom view of a break closed state. 切れ目閉状態の正面図である。It is a front view of a break closed state. 射出成形による製法の説明を兼ねた底面図である。It is a bottom view which served as explanation of the manufacturing method by injection molding. 種々の実施例を示した要部拡大断面図である。It is the principal part expanded sectional view which showed the various Example. 種々の実施例を示した要部拡大断面図である。It is the principal part expanded sectional view which showed the various Example. 組込（装着）状態の一例を説明する拡大断面図である。It is an expanded sectional view explaining an example of a built-in (mounting) state. 組込（装着）状態の他の例を説明する拡大断面図である。It is an expanded sectional view explaining other examples of a built-in (mounting) state. 種々の実施例を示した要部拡大断面図である。It is the principal part expanded sectional view which showed the various Example. 組込（装着）状態の別の実施の形態を説明する拡大断面図である。It is an expanded sectional view explaining another embodiment of a built-in (mounting) state. さらに別の種々の実施例を示した要部拡大断面図である。It is the principal part expanded sectional view which showed another various Example.

以下、実施の形態を示す図面に基づき本発明を詳説する。
図３と図４に示すように、本発明のシールリングＳは、自由状態では、円周１箇所に切れ目５を有する円環状の全体形状を有している。そして、このシールリングＳは、 360°よりも僅かに小さい中心角度を占めるリング本体１と、リング本体１の第１端部１１と第２端部１２から周方向に延伸状に第１凸部２１・第２凸部２２が付設されている。
図１と図２に於て使用状態を示し、エアコンディショナー用の圧縮機２のスクロール圧縮機構３に適用されている場合を例示する。 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
As shown in FIGS. 3 and 4, the seal ring S of the present invention has an annular overall shape having a cut 5 at one place in the circumference in a free state. The seal ring S includes a ring main body 1 occupying a central angle slightly smaller than 360 °, and a first convex portion extending in a circumferential direction from the first end portion 11 and the second end portion 12 of the ring main body 1. 21. A second convex portion 22 is attached.
FIGS. 1 and 2 show the state of use, and exemplifies a case where the present invention is applied to a scroll compression mechanism 3 of a compressor 2 for an air conditioner.

スクロール圧縮機構３は、主に、ハウジング４と、ハウジング４の上方に密着して配置される固定スクロール６と、固定スクロール６に噛合する可動スクロール７等から構成される。ハウジング４には、可動スクロール７の下面（背面）７Ａと対向する平面部４Ａにシール溝４Ｂが凹設され、このシール溝４Ｂに本発明のシールリングＳが装入されている。
シールリングＳは、可動スクロール７の背面７Ａ、及び、ハウジング４の平面部４Ａの間を密封（シール）して、背圧空間を形成する。（なお、図２は図１のＹ部の拡大図である。 The scroll compression mechanism 3 mainly includes a housing 4, a fixed scroll 6 disposed in close contact with the upper side of the housing 4, a movable scroll 7 that meshes with the fixed scroll 6, and the like. In the housing 4, a seal groove 4 B is formed in a flat surface portion 4 A facing the lower surface (back surface) 7 A of the movable scroll 7, and the seal ring S of the present invention is inserted in the seal groove 4 B.
The seal ring S seals between the back surface 7A of the movable scroll 7 and the flat portion 4A of the housing 4 to form a back pressure space. (Note that FIG. 2 is an enlarged view of a Y portion in FIG. 1.

そして、図３と図４に示すように、切れ目５が開状態である全体形状に、熱可塑性樹脂組成物にて、一体形成する。図３と図７に於て、矢印Ｆは射出成形時の溶融樹脂の注入方向を示し、１０は注入ゲート（跡）部であり、（図示省略した）切断刃にて可能な限り美しく切断したとしても、微小突部が残留形成される虞もあって、仕上げのために研削等の機械加工を行うこともあり得る。しかしながら、このような注入ゲート跡部１０以外は、機械加工を省略して、射出成形面とすることが可能である。なお、図７の底面図に於て、湯道１０Ｆと注入ゲート部１０とを一例として図示している。 And as shown in FIG. 3 and FIG. 4, it forms integrally with the thermoplastic resin composition in the whole shape which the cut | interruption 5 is an open state. In FIGS. 3 and 7, arrow F indicates the injection direction of the molten resin at the time of injection molding, 10 is an injection gate (trace) portion, and was cut as beautifully as possible with a cutting blade (not shown). However, there is a possibility that the minute protrusions may remain and machining such as grinding may be performed for finishing. However, except for such an injection gate trace portion 10, machining can be omitted to form an injection molding surface. In the bottom view of FIG. 7, the runner 10F and the injection gate 10 are shown as an example.

本発明のシールリングＳを射出成形するのに好適な熱可塑性樹脂組成物としては、ＰＥＳ樹脂組成物を挙げ得る。射出成形品に、いわゆるバリが発生しにくい利点があり、さらに、熱膨張率が低く金型から取出した後の収縮性が低くシールリングＳの寸法も高精度に維持され、前述の機械加工を省略可能となる利点がある。 As a thermoplastic resin composition suitable for injection molding the seal ring S of the present invention, a PES resin composition may be mentioned. The injection-molded product has the advantage that so-called burrs are less likely to occur. Furthermore, the thermal expansion coefficient is low, the shrinkability after taking out from the mold is low, and the size of the seal ring S is maintained with high accuracy, so that the above-mentioned machining can be performed. There is an advantage that it can be omitted.

さらに、その他の材質をも加えて詳しく説明する。
本発明において射出成形すべき熱可塑性樹脂組成物としては、曲げ弾性率が1500MPa 以上、6000MPa 以下のものであればよく、例えば、ポリサルフォン系樹脂組成物、具体的には、ＰＥＳ（ポリエーテルサルフォン）樹脂組成物、ＰＳＵ（ポリサルフォン）樹脂組成物、ＰＰＳＵ（ポリフェニルサルフォン）樹脂組成物が好ましい。特に、曲げ弾性率は2000MPa 以上、4000MPa 以下が望ましい。 Furthermore, it adds and demonstrates in detail other materials.
The thermoplastic resin composition to be injection-molded in the present invention may be one having a flexural modulus of 1500 MPa or more and 6000 MPa or less. For example, a polysulfone-based resin composition, specifically, PES (polyethersulfone). ) A resin composition, a PSU (polysulfone) resin composition, and a PPSU (polyphenylsulfone) resin composition are preferred. In particular, the flexural modulus is preferably 2000 MPa or more and 4000 MPa or less.

また、本発明に係るシールリングに好適なＰＥＳ樹脂組成物としては、ＰＥＳ樹脂にグラファイト粉末等の層状結晶構造を有する化合物、及び／または、フッ素樹脂粉末等を添加したＰＥＳ樹脂組成物である。このような添加によって、上述の曲げ弾性の範囲に特性を調整し易くなり、シールリングとしての耐摩耗性に優れ、耐熱・耐薬品性も良好で、十分な伸張性を有し、装着性及びシール性も良好であり、図１に例示したエアコンディショナー用圧縮機等に好適である。
なお、他の熱可塑性樹脂組成物として、ポリアリ−レンサルファイド系樹脂組成物、具体的には、ＰＰＳ（ポリフェニルサルファイド）樹脂に上記したグラファイト粉末等の層状結晶構造を有する化合物、フッ素樹脂粉末、及び／または、ガラス繊維、カーボンファイバ等の繊維状充填材を添加したＰＰＳ樹脂組成物も適用できる。 The PES resin composition suitable for the seal ring according to the present invention is a PES resin composition obtained by adding a compound having a layered crystal structure such as graphite powder and / or a fluororesin powder to the PES resin. Such addition makes it easy to adjust the characteristics within the above-mentioned range of bending elasticity, excellent wear resistance as a seal ring, good heat and chemical resistance, sufficient stretchability, wearability and It also has good sealing properties and is suitable for the air conditioner compressor exemplified in FIG.
In addition, as another thermoplastic resin composition, a polyarylene sulfide-based resin composition, specifically, a compound having a layered crystal structure such as the above-described graphite powder in a PPS (polyphenyl sulfide) resin, a fluororesin powder, A PPS resin composition to which a fibrous filler such as glass fiber or carbon fiber is added can also be applied.

そして、図３に示した如く、切れ目５が開状態の全体形状に、上述の熱可塑性樹脂組成物にて一体に形成されるのであるが、射出金型から取出した、切れ目５が開状態であるシールリングＳのリング本体１は、切れ目５と反対側に曲率半径Ｒ₁₃が最大寸法である（最大寸法の）部位１３を有し、この最大寸法の部位１３から第１端部１１・第２端部１２の各々に向かって、周方向Ｍ_１，Ｍ_２に近づくに従って、曲率半径Ｒ_１，Ｒ_２がしだいに減少して、第１端部１１・第２端部１２の曲率半径Ｒ₁₁，Ｒ₁₂が最小寸法となるように設定され、さらに、（小さな突出寸法である）第１凸部２１・第２凸部２２の外周面の曲率半径は前記Ｒ₁₁，Ｒ₁₂と同一とする。
なお、前記曲率半径Ｒ₁₃，Ｒ_１，Ｒ_２，Ｒ₁₁，Ｒ₁₂は、図３に示したように、中心点Ｏ_１から、リング本体１の外周面までの寸法とする。 Then, as shown in FIG. 3, the cut 5 is integrally formed with the above-described thermoplastic resin composition in the entire shape in the open state, but the cut 5 taken out from the injection mold is in the open state. The ring main body 1 of a certain seal ring S has a portion 13 having the maximum radius of curvature R ₁₃ (the maximum size) on the side opposite to the cut 5, and the first end portion 11. As each of the two end portions 12 approaches the circumferential directions M ₁ and M ₂ , the curvature radii R ₁ and R ₂ gradually decrease, and the first and second end portions 11 and 12 have a curvature radius R. _11, R ₁₂ is set so that the minimum dimension, further, the same as (a small projection dimension) the radius of curvature of the outer peripheral surface of the first protrusion 21, the second convex portion 22 is the R _11, R ₁₂ To do.
The curvature radii R ₁₃ , R ₁ , R ₂ , R ₁₁ , R ₁₂ are the dimensions from the center point O ₁ to the outer peripheral surface of the ring body 1 as shown in FIG.

さらに、追加説明すると、図３の平面図に於て、開状態のリング本体１は、切れ目５の中央の点（中心点）Ｐ_５に対して 180°±30°の範囲内に、最大寸法の部位１３が存在する。つまり、図３に示したθは30°であり、２θ＝60°の範囲内に最大寸法の部位１３を配設している。（なお、図３に於て、Ｌ_０は中央点Ｐ_５を含んだ直径を示す線である。） Further, in addition, in the plan view of FIG. 3, the ring body 1 in the open state has a maximum dimension within a range of 180 ° ± 30 ° with respect to the central point (center point) P ₅ of the cut 5. The site | part 13 exists. That is, θ shown in FIG. 3 is 30 °, and the portion 13 having the maximum dimension is disposed in the range of 2θ = 60 °. (In FIG. 3, L ₀ is a line indicating the diameter including the center point P _5. )

このように、金型のキャビティの形状・寸法、及び、それから取出されたシールリングＳ（図３参照）は、その外周縁形状が、切れ目５に対して 180°反対側における±θ（＝±30°）の範囲内に、曲率半径Ｒ₁₃が最大寸法の部位１３を配設し、この部位１３から切れ目５に向かってしだいに減少する非真円形に設定する。
使用状態―――図２に示すようにシール溝４Ｂに装着された状態―――では、第１凸部２１と第２凸部２２とが相互に重なり合って切れ目閉状態となるが、切れ目開状態下で上述した非真円形であることによって、弾性変形に伴って、（図５に示す如く）中心点Ｏ_１から同一の曲率半径Ｒ_０の真円形になり、図２に示したシール溝４Ｂのラジアル方向外側の内壁面１４に対して密に接触する。切れ目開状態（図３）から切れ目閉状態（図５）へ変形する際、最大寸法の部位１３が最も大きく曲率半径が減少するように変形し、第１端部１１・第２端部１２側はほとんど変形しない。従って、図５に示した前記曲率半径Ｒ_０は、図３に示した端部１１，１２の曲率半径Ｒ₁₁，Ｒ₁₂に相等しくなる。 As described above, the shape and size of the cavity of the mold and the seal ring S (see FIG. 3) taken out from the cavity have an outer peripheral edge shape of ± θ (= ± on the opposite side of 180 ° with respect to the cut 5. A portion 13 having a maximum radius of curvature R ₁₃ is disposed within a range of 30 °), and is set to a non-circular shape that gradually decreases from this portion 13 toward the cut 5.
In the use state--in the state where it is mounted in the seal groove 4B as shown in FIG. 2, the first convex portion 21 and the second convex portion 22 overlap each other to form a cut-closed state. Due to the non-circular shape described above under the state, it becomes a perfect circle with the same radius of curvature R ₀ from the center point O ₁ (as shown in FIG. 5) due to elastic deformation, and the seal groove shown in FIG. It comes into close contact with the inner wall surface 14 on the radially outer side of 4B. When deformed from the cut open state (FIG. 3) to the cut closed state (FIG. 5), the portion 13 having the largest dimension is deformed so that the radius of curvature is the largest, and the first end portion 11 and the second end portion 12 side. Hardly deforms. Accordingly, the curvature radius R ₀ shown in FIG. 5 is equal to the curvature radii R ₁₁ and R ₁₂ of the end portions 11 and 12 shown in FIG.

リング本体１の横断面形状は、一例として、矩形状である。本発明に於て、「矩形状」とは、図２，図９等に示した正方形，長方形は勿論包含し、さらに、基本矩形Ｇから１角部１５を傾斜状直線によって面取りした形状を含み、かつ、図示省略するが上記１角部１５以外の残りの角部の一部乃至全部を小さく面取りした多角形状を含み、浅溝状切欠部を有する形状を含み、また、小アール部を４つの角部の内の少なくとも一つに有する形状をも包含すると、定義する。
図２に示す使用状態で、可動スクロール７の背面７Ａ等の（可動側）被密封面Ｐ_１に摺接する第１摺接面２６と、シール溝４Ｂの内壁面１４等の（固定側）被密封面Ｐ_２に摺接する第２摺接面２７とを、有している。直交する二つの被密封面Ｐ_１，Ｐ_２によって形成される隅部８に、受圧時に押付けられる。 The cross-sectional shape of the ring main body 1 is a rectangular shape as an example. In the present invention, the “rectangular shape” includes, of course, the squares and rectangles shown in FIGS. 2 and 9, and further includes a shape in which one corner 15 is chamfered from the basic rectangle G by an inclined straight line. In addition, although not shown in the drawing, the shape includes a polygonal shape in which part or all of the remaining corners other than the one corner 15 are chamfered, a shape having a shallow groove-like notch, and 4 small round portions. It is defined to include a shape having at least one of the corners.
In use state shown in FIG. 2, the rear 7A such the movable scroll 7 and the first sliding contact surface 26 in sliding contact with the (movable side) to be tightly sealed surface P _1, the seal groove 4B inner wall surface 14 or the like (fixed side) and a second sliding contact surface 27 in sliding contact with the tight sealing plane P _2, it has. The corner portion 8 formed by two of the tightly sealed surface P _1, P ₂ orthogonal, pressed at the pressure receiving.

ところで、本発明は、ＰＥＳ樹脂組成物等の熱可塑性樹脂組成物を採用したことにより、図２等に示した横断面を正方形，長方形としても（面取りを省略しても）、スクロール運動中にシールリングＳの１角部１５が、背面７Ａと平面部４Ａとの間隙９に、噛み込む等の不具合が生じない利点がある。（但し、安全を見て小さな面取り部を形成しても、自由である。） By the way, the present invention adopts a thermoplastic resin composition such as a PES resin composition, so that the cross section shown in FIG. 2 or the like is made square or rectangular (even if chamfering is omitted), or during the scroll motion. There is an advantage that the corner portion 15 of the seal ring S does not cause a problem such as biting into the gap 9 between the back surface 7A and the flat surface portion 4A. (However, it is free to form a small chamfer for safety reasons.)

第１凸部２１と第２凸部２２の横断面形状は、図８、図１２に示す如く、種々のものを考え得る。そして、図１０、図１１に示した使用状態に於て、図８（Ａ）、図１２（Ｃ）の横断面形状の第１凸部２１と第２凸部２２は、直交する二つの被密封面Ｐ_１，Ｐ_２にて形成された隅部８に押圧される。さらに、リング本体１は、同様に隅部８に押圧されつつ、図２に示すように、二つの被密封面Ｐ_１，Ｐ_２に、第１摺接面２６と第２摺接面２７が、圧接する。 Various cross-sectional shapes of the first convex portion 21 and the second convex portion 22 can be considered as shown in FIGS. 10 and FIG. 11, the first convex portion 21 and the second convex portion 22 having the cross-sectional shapes in FIG. 8A and FIG. It is pressed against the corner portion 8 formed by tightly sealing surfaces _P _1, P _2. Further, the ring body 1 while being pressed against the corner portion 8 as well, as shown in FIG. 2, the two of the tightly sealed surface P _1, P _2, and the first sliding surface 26 and the second sliding surface 27 , Press contact.

図２、図１０、図１１等に示すように、リング本体１には、二つの上記被密封面Ｐ_１，Ｐ_２に対向する密封用対向領域Ｘを除外した―――前記第１摺接面２６及び第２摺接面２７を除外した―――非対向領域Ｚに、シールリングＳの装着の向きを誤らない（ミスしない）ための誤装着防止用目印Ｕを、設ける。 2, FIG. 10, as shown in FIG. 11 or the like, the ring in the body 1, excluding the sealing opposed region X that faces the two above the dense sealing surface P _1, P ₂ --- the first sliding contact The surface 26 and the second slidable contact surface 27 are excluded --- in the non-facing region Z, a mark U for erroneous mounting prevention is provided to prevent the mounting direction of the seal ring S from being incorrect (not missed).

リング本体１が矩形状の横断面であれば、前記第１摺接面２６及び第２摺接面２７以外の二辺が、非対向領域Ｚであり、この非対向領域Ｚに、目印Ｕを配設する。図３と図４と図５と図７に於ては、第１摺接面２６と平行な反対側の面４６に、周方向に所定ピッチをもって円形の有底孔４７をもって、目印Ｕとしている。
図７に示す実施の形態では、シールリングＳの全体を熱可塑性樹脂組成物にて射出成形する際に、誤装着防止用目印Ｕとしての有底孔４７を、同時に一体形成している。 If the ring main body 1 has a rectangular cross section, the two sides other than the first slidable contact surface 26 and the second slidable contact surface 27 are non-opposing regions Z. Arrange. 3, 4, 5, and 7, a circular bottomed hole 47 having a predetermined pitch in the circumferential direction is formed on the opposite surface 46 parallel to the first sliding contact surface 26 as a mark U. .
In the embodiment shown in FIG. 7, when the entire seal ring S is injection-molded with the thermoplastic resin composition, a bottomed hole 47 as an erroneous mounting prevention mark U is formed integrally at the same time.

図９（Ｂ）（Ｃ）に示した実施例では、第２摺接面２７と平行な内周面４８と、下面４６との角部１８を切欠く小凹窪部４９を、シールリングＳの全体にわたって（図７と同様に）所定ピッチにて配設している。小凹窪部４９は図９（Ｂ）では立方体状であり、図９（Ｃ）では、４半円柱状又は４半球状である。なお、図１１に示す実施例でも、図９（Ｃ）と同様の小凹窪部４９を設けて、目印Ｕを構成している。 In the embodiment shown in FIGS. 9 (B) and 9 (C), the small concave recess 49 that cuts out the corner 18 between the inner peripheral surface 48 parallel to the second slidable contact surface 27 and the lower surface 46 is used as the seal ring S. Are arranged at a predetermined pitch (similar to FIG. 7). The small concave depression 49 has a cubic shape in FIG. 9B, and has a four semi-cylindrical shape or a four hemispherical shape in FIG. 9C. In the embodiment shown in FIG. 11 as well, a small concave recess 49 similar to that shown in FIG.

次に、第１凸部２１と第２凸部２２の横断面形状は、図９に示したような（横断面矩形状の）基本矩形を、分離線Ｌｃにて２分割して、第１対応面２３と第２対応面２４をもって、相互に対応する。第２凸部２２は、前述したリング本体１の１角部１５に連続した１角部１５Ａを有し、図８（Ａ）（Ｂ）（Ｃ）のいずれも、第２凸部２２の方が、第１凸部２１よりも、断面積が小さく、この第２凸部２２の上記１角部１５Ａを頂点とする三角形が、図１０に示すように、隅部８の奥隅部に対応して、間隙９を閉鎖状として密封性を発揮する。図８（Ａ）（Ｂ）（Ｃ）は、各々、第２凸部２２の断面が、三角形、小矩形、４半円形の場合を例示している。また、図５と図６に示すように、第１凸部２１と第２凸部２２とが相互に重なり合った切れ目閉状態に於て、図８に示すように、第１凸部２１と第２凸部２２が、基本矩形Ｇ（図９参照）から食み出さない寸法（寸法公差）に、第１凸部２１と第２凸部２２の横断面各部寸法を設定する。 Next, the cross-sectional shapes of the first convex portion 21 and the second convex portion 22 are obtained by dividing a basic rectangle (cross-sectional rectangular shape) as shown in FIG. The corresponding surface 23 and the second corresponding surface 24 correspond to each other. The second convex portion 22 has a corner portion 15A that is continuous with the corner portion 15 of the ring body 1 described above, and both of FIGS. 8A, 8B, and 8C are directed to the second convex portion 22. However, the cross-sectional area is smaller than that of the first convex portion 21, and the triangle having the vertex 15A of the second convex portion 22 as the apex corresponds to the back corner portion of the corner portion 8 as shown in FIG. Thus, the gap 9 is closed and the sealing performance is exhibited. FIGS. 8A, 8 B, and 8 C each illustrate a case where the cross section of the second convex portion 22 is a triangle, a small rectangle, or a semicircular shape. Further, as shown in FIGS. 5 and 6, in the closed state where the first convex portion 21 and the second convex portion 22 overlap each other, as shown in FIG. 8, the first convex portion 21 and the second convex portion 22 The dimensions of the cross sections of the first convex portion 21 and the second convex portion 22 are set so that the two convex portions 22 do not protrude from the basic rectangle G (see FIG. 9).

次に、図１２に於て、第２凸部２２の断面形状は、三角形であるのに対し、第１凸部２１は第１対応面２３の反対側に削り取り部（凹部）３３が形成されている。図１２（Ａ）と図１２（Ｂ）（実線）に於て、第１凸部２１の断面形状は、第１対応面２３と平行な傾斜線２５を底面とする台形であり、また、厚さ寸法Ｔ_１は大小設計変更可能である。さらに、図１２（Ｂ）に一点鎖線をもって示したように、第１凸部２１の底面を成す傾斜線２５Ａを、第１対応面２３と非平行状としても良い。 Next, in FIG. 12, the cross-sectional shape of the second convex portion 22 is a triangle, whereas the first convex portion 21 is formed with a scraped portion (concave portion) 33 on the opposite side of the first corresponding surface 23. ing. In FIG. 12A and FIG. 12B (solid line), the cross-sectional shape of the first convex portion 21 is a trapezoid whose bottom surface is an inclined line 25 parallel to the first corresponding surface 23. dimensioned T ₁ can be large and small design changes. Furthermore, as indicated by the alternate long and short dash line in FIG. 12B, the inclined line 25 A that forms the bottom surface of the first convex portion 21 may be non-parallel to the first corresponding surface 23.

次に、図１２（Ｃ）に於て、第１凸部２１は、傾斜片部３０と、その両端の折曲片部３１，３２から成る断面形状を有し、削り取り部３３は、ダイヤモンド形断面である。
また、図１２（Ｄ）では、凹部３３を曲線円弧状に形成している。そして、第１凸部２１は被密封面Ｐ_１，Ｐ_２（図２参照）に当接する当接片部３１Ａ，３２Ａを有する。
さらに、図１２（Ａ）〜（Ｄ）に於て、リング本体１側に形成された誤装着防止用目印Ｕを、破線にて図示している。即ち、非対向領域Ｚに誤装着防止用目印Ｕを凹設している。具体的には、図１２（Ａ）（Ｃ）（Ｄ）の目印Ｕは、図９（Ｂ）（Ｃ）と同様の位置に配置され、また、図１２（Ｂ）の目印Ｕは、図９（Ａ）と同様である。 Then, At a FIG. 12 (C), the first convex portion 21, the inclined piece portion 30 has a sectional shape consisting of bent piece portions 31 and 32 at both ends, chipping unit 33, diamond-shaped It is a cross section.
In FIG. 12D, the recess 33 is formed in a curved arc shape. The first convex portion 21 is secret sealing surfaces P _1, _{P 2} abuts (see FIG. 2) abutting piece portion 31A, has a 32A.
Further, in FIGS. 12A to 12D, the erroneous mounting prevention mark U formed on the ring body 1 side is shown by a broken line. That is, it recessed a non-facing regions attachment preventing mark U erroneous Z. Specifically, the mark U in FIGS. 12A, 12C, and 12D is disposed at the same position as in FIGS. 9B and 9C, and the mark U in FIG. It is the same as 9 (A).

次に、図１３に示した、さらに他の実施例では、シールリングＳのリング本体１の横断面形状が円形であり、スクロール圧縮機構３のハウジング４のシール溝４Ｂに装着された装着状態では、円弧状の第１・第２摺接面２６Ａ，２７Ａが、被密封面Ｐ_１，Ｐ_２に夫々摺接する。この第１・第２摺接面２６Ａ，２７Ａは、円形リング本体１の断面に於て、約90°の中心角度を成す位置に在る。このような円形の横断面のリング本体１にあっても、非対向領域Ｚには誤装着防止用目印Ｕ（有底孔４７）が配設される。このように、リング本体１は、基本円形Ｇ´であるということができる。 Next, in still another embodiment shown in FIG. 13, the cross-sectional shape of the ring body 1 of the seal ring S is circular, and in the mounted state in which the seal groove 4 B of the housing 4 of the scroll compression mechanism 3 is mounted. , arcuate first and second sliding surface 26A, 27A are respectively brought into sliding contact with the object to be tightly sealed surface P _1, _{P 2.} The first and second slidable contact surfaces 26A and 27A are located at a center angle of about 90 ° in the cross section of the circular ring body 1. Even in the ring body 1 having such a circular cross section, the non-facing region Z is provided with a mark U (bottomed hole 47) for preventing erroneous mounting. Thus, it can be said that the ring body 1 is the basic circle G ′.

図１４に示すように、この基本円形Ｇ´を分離線Ｌｃにて２分割し、第１凸部２１と第２凸部２２を形成する。第１凸部２１と第２凸部２２とは、微小シール間隙ｇをもって、第１対応面２３と第２対応面２４が対向する。そして、第１凸部２１は第１対応面２３の反対面側に削り取り部３３が形成されている。第１凸部２１と第２凸部２２とが相互に重なり合った切れ目閉状態で、第１凸部２１と第２凸部２２がリング本体１の横断面の輪郭線（基本円形Ｇ´）から、食み出さない寸法に設定されている。 As shown in FIG. 14, the basic circle G ′ is divided into two by the separation line Lc, and the first convex portion 21 and the second convex portion 22 are formed. The first corresponding surface 23 and the second corresponding surface 24 are opposed to each other between the first protrusion 21 and the second protrusion 22 with a minute seal gap g. The first convex portion 21 is formed with a scraping portion 33 on the opposite side of the first corresponding surface 23. In the closed state where the first convex portion 21 and the second convex portion 22 overlap each other, the first convex portion 21 and the second convex portion 22 are from the outline (basic circle G ′) of the cross section of the ring body 1. The dimensions are set so as not to protrude.

そして、第２凸部２２の横断面形状は、細い弓形であり、円弧部５２と、（弦としての）第２対応面２４をもって形成され、この第２凸部２２の円弧部５２が、（図１３に示した）使用状態下で、被密封面Ｐ_１，Ｐ_２に圧接（摺接）する。
なお、図示省略するが、第１凸部２１に於て、削り取り部３３を省略した横断面形状としても良い。 And the cross-sectional shape of the 2nd convex part 22 is a thin arch shape, and is formed with the circular arc part 52 and the 2nd corresponding surface 24 (as a string), and the circular arc part 52 of this 2nd convex part 22 is ( in) under use state shown in FIG. 13, it is pressed (sliding contact) to be tightly sealed surface P _1, _{P 2.}
Although not shown, the first convex portion 21 may have a cross-sectional shape in which the scraping portion 33 is omitted.

図１４（Ａ）のものは、削り取り部３３が大き目の弓形であって、第１凸部２１は、第１対応面２３と、これと平行な傾斜線２５を有する傾斜片部３０をもって、構成されている。なお、この肉厚をいずれか一方へしだいに減少するように形成しても良い。
図１４（Ｂ）では、削り取り部３３の断面形状が屋根型であり、第１凸部２１は、両端に釘部４３，４３を有するカスガイ形である。
次に図１４（Ｃ）では、削り取り部３３の断面形状はラグビー球形であり、第１凸部２１は、外側に、直線傾斜状の第１対応面２３を有すると共に、内側（裏面側）に、弧状曲線凹部を有する。 In FIG. 14A, the shaving portion 33 is a large arcuate shape, and the first convex portion 21 has a first corresponding surface 23 and an inclined piece portion 30 having an inclined line 25 parallel thereto. Has been. In addition, you may form so that this thickness may reduce to either one gradually.
In FIG. 14 (B), the cross-sectional shape of the shaving part 33 is a roof type, and the 1st convex part 21 is a snail shape which has the nail parts 43 and 43 at both ends.
Next, in FIG. 14C, the cross-sectional shape of the scraping portion 33 is a rugby sphere, and the first convex portion 21 has a linearly inclined first corresponding surface 23 on the outer side and on the inner side (back side). And having an arcuate curved recess.

ところで、図１４（Ａ）に於ては、リング本体１の非対向領域Ｚに、誤装着防止用目印Ｕとして、小凸部４４，４４を設けている。このような小凸部４４を、既述の図２〜図７、図９、図１１、図１２の孔４７や小凹窪部４９に代えて、付設するも、自由である。
そして、図１４（Ｃ）では、目印Ｕとして孔４７を、図１４（Ｄ）では、目印Ｕとして小凹窪部４９が設けられた場合を、例示している。 By the way, in FIG. 14 (A), the small convex parts 44 and 44 are provided in the non-facing area Z of the ring main body 1 as the mark U for erroneous attachment prevention. Such small convex portions 44 may be provided in place of the holes 47 and the small concave recess portions 49 in FIGS. 2 to 7, 9, 11, and 12 described above.
14C illustrates the case where the hole 47 is provided as the mark U, and in FIG. 14D, the small concave recess 49 is provided as the mark U.

図１０，図１１に示した使用状態に於て、同図の上下を逆とした誤装着を想定すれば、隅部８の最奥部に配置されるべき第２凸部２２が下方に存在し、第１凸部２１が最奥部に配置され、流体を漏洩しないようにシールすることが困難となることは、明らかである。
特に、図９，図１０でも判るように、リング本体１の大きさに比べて、第１凸部２１・第２凸部２２は極めて小さく、どちらを隅部８（の最奥部）に対応させるべきか、目視にて作業時に判断することが至難である。本発明では、図３〜図６に例示したように、裏返せば、装着作業時に目視にて、簡単かつ明確に、シールリングＳの装着方向が、判断可能である。即ち、シールリングＳの誤装着を、簡単かつ確実に、防止可能となる。また、図７と図５等からも明らかな如く、シールリングＳの形状・構造はほとんど複雑化させずに、目印Ｕを付設できる。 10 and FIG. 11, the second convex portion 22 that should be disposed at the innermost portion of the corner portion 8 is present at the lower side when an erroneous mounting is assumed in which the top and bottom of the drawing are reversed. However, it is clear that the first convex portion 21 is disposed at the innermost portion and it is difficult to seal the first convex portion 21 so as not to leak the fluid.
In particular, as can be seen in FIGS. 9 and 10, the first convex portion 21 and the second convex portion 22 are extremely small compared to the size of the ring main body 1, which corresponds to the corner portion 8 (the innermost portion). It is very difficult to determine at the time of work whether or not it should be done. In the present invention, as illustrated in FIG. 3 to FIG. 6, if turned over, the mounting direction of the seal ring S can be easily and clearly determined by visual observation during the mounting operation. That is, erroneous mounting of the seal ring S can be prevented easily and reliably. Further, as is clear from FIGS. 7 and 5 and the like, the mark U can be provided without making the shape and structure of the seal ring S almost complicated.

ところで、摩擦抵抗低減のために可動側被密封面Ｐ_１に対応する第１摺接面２６（２６Ａ）に凹溝を形成するのが望ましい場合がある。そのような凹溝を形成したシールリングＳに於て、図３〜図７に示すように多数個の小さな有底孔４７を周方向に所定ピッチをもって配設することで、摩擦抵抗低減のための上記凹溝と混合することなく、明確に識別できる利点もある。なお、誤装着防止用目印Ｕとしては、上述の実施例に限らず、文字・図形・記号を凹状に、又は、凸状に、非対向領域Ｚに付設しても、好ましい場合があり、さらには、上述の実施例と、文字・図形・記号とを、併用するも、自由である。 Incidentally, it may be desirable to form the groove in the first sliding surface 26 corresponding to the movable side to be tightly sealed surface P ₁ (26A) for drag reduction. In the seal ring S in which such a concave groove is formed, a large number of small bottomed holes 47 are arranged at a predetermined pitch in the circumferential direction as shown in FIGS. There is also an advantage that can be clearly identified without mixing with the above-mentioned concave groove. In addition, the erroneous mounting prevention mark U is not limited to the above-described embodiment, and it may be preferable that the character, figure, or symbol is concavely or convexly attached to the non-facing region Z. The above-described embodiment and characters / graphics / symbols can be used in combination.

本発明は、以上詳述したように、円周１箇所に切れ目５を有する円環状であって、リング本体１と、該リング本体１の第１端部１１・第２端部１２から周方向に延伸状の第１凸部２１・第２凸部２２とを有し、さらに、直交する二つの被密封面Ｐ_１，Ｐ_２にて形成される隅部８に配設されて上記被密封面Ｐ_１，Ｐ_２に圧接して密封作用をなすシールリングに於て、直交する二つの上記被密封面Ｐ_１，Ｐ_２に対向する密封用対向領域Ｘを除外した非対向領域Ｚに、誤装着防止用目印Ｕを設けた構成であるので、スクロール圧縮機への組込み（装着）作業に於ける、上下（表裏）逆に組込むミス（誤装着）を、確実に防止できる。これによって、極めて小さな第１凸部２１と第２凸部２２の微妙かつ斬新な形状に関しての研究開発の成果を、現場に於て、間違いなく発揮できることとなる。
また、熱可塑性樹脂組成物にて全体が射出成形され、かつ、上記誤装着防止用目印Ｕを上記射出成形にて、一体に形成したので、誤装着防止用目印Ｕを能率良く簡単に設けることができる。しかも、熱可塑性樹脂組成物の射出成形にて、高品質・高性能のシールリングを容易・安価に得ることができる。 As described in detail above, the present invention is an annular shape having a cut 5 at one place on the circumference, and the ring body 1 and the circumferential direction from the first end 11 and the second end 12 of the ring body 1. a and a stretching-shaped first protrusions 21, second protrusions 22, further arranged in the corner portion 8 formed by two of the tightly sealed surface P _1, P ₂ perpendicular to the object to be tightly pressed against the sealing surface P _1, P ₂ at a sealing ring forming a sealing action, the non-facing regions Z excluding the two sealing opposing region X that faces the to be tightly sealed surface P _1, P ₂ orthogonal, Since it is provided with the mark U for erroneous mounting prevention, it is possible to reliably prevent mistakes (erroneous mounting) that are installed upside down (front and back) in the assembly (mounting) work into the scroll compressor. As a result, the results of research and development regarding the delicate and novel shapes of the very small first convex portion 21 and the second convex portion 22 can be exhibited without fail in the field.
Moreover, since the whole of the thermoplastic resin composition is injection-molded, and the erroneous mounting prevention mark U is integrally formed by the injection molding, the erroneous mounting prevention mark U is provided efficiently and easily. Can do. In addition, a high-quality and high-performance seal ring can be obtained easily and inexpensively by injection molding of the thermoplastic resin composition.

１リング本体
５切れ目
１１第１端部
１２第２端部
２１第１凸部
２２第２凸部
Ｐ_１可動側被密封面（平面）
Ｐ_２固定側被密封面（曲面）
Ｓシールリング
Ｕ誤装着防止用目印
Ｘ密封用対向領域
Ｚ被対向領域 1 ring body 5 cuts 11 first end 12 second end 21 first protrusion 22 second protrusion P ₁ movable object tight sealing surface (plane)
P ₂ fixed side to be tightly sealed surface (curved)
S Seal ring U Mark for preventing improper mounting X Sealing counter area Z Counter area

Claims

An annular shape having a notch (5) at one circumference, the ring body (1), and the ring body (1) from the first end (11) and the second end (12) in the circumferential direction A corner (8) having elongated first protrusions (21) and second protrusions (22), and formed by two orthogonally sealed surfaces (P ₁ ) (P ₂ ) A seal ring which is disposed on the surface to be sealed and press-contacts the sealed surface (P ₁ ) (P ₂ ),
A non-opposing region (Z) excluding the sealing opposing region (X) facing the two sealed surfaces (P ₁ ) and (P ₂ ) orthogonal to each other has a mark (U) for preventing erroneous mounting ,
The erroneous mounting prevention mark (U) is composed of bottomed holes (47) arranged in a dotted pattern at a predetermined pitch in the circumferential direction,
A seal ring characterized in that the whole seal ring having the dotted hole (47) having a dotted shape is injection-molded with a thermoplastic resin composition .

An annular shape having a notch (5) at one circumference, the ring body (1), and the ring body (1) from the first end (11) and the second end (12) in the circumferential direction Corner portion (8) having elongated first convex portions (21) and second convex portions (22), and further formed by two orthogonal surfaces to be sealed (P ₁ ) (P ₂ ) A seal ring which is disposed on the surface to be sealed and press-contacts the sealed surface (P ₁ ) (P ₂ ),
Exclude sealing opposing region (X) facing two orthogonal surfaces to be sealed (P ₁ ) (P ₂ )
The non-facing area (Z) has a mark (U) for preventing erroneous mounting,
The erroneous mounting prevention mark (U) is composed of small concave depressions (49) arranged in a dotted pattern at a predetermined pitch in the circumferential direction,
Sealing ring the entire seal ring, characterized in that it has been formed out morphism Te thermoplastic resin composition having an unevenness distribution of the small recessed portion (49).