JP2010242814A - Sealing device - Google Patents

Sealing device Download PDF

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JP2010242814A
JP2010242814A JP2009090424A JP2009090424A JP2010242814A JP 2010242814 A JP2010242814 A JP 2010242814A JP 2009090424 A JP2009090424 A JP 2009090424A JP 2009090424 A JP2009090424 A JP 2009090424A JP 2010242814 A JP2010242814 A JP 2010242814A
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sealing device
ring
fixed
stationary ring
seal
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光 ▲但▼野
Hikari Tadano
Kenichi Agui
賢一 安喰
Nobuyuki Eguchi
信行 江口
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Nok Corp
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Nok Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing device which is easily assembled and removed without the necessity of a special tool so as to be used for assembling, removing or press-fitting. <P>SOLUTION: The sealing device includes a stationary ring fixed to one member to seal the annular gap between two members so as to be assembled in a mutually movable state, and a seal body fixed to the stationary ring so as to touch the other member slidably. A threaded section is provided in the stationary ring so as to be screwed and fixed into a threaded section provided in the one member. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、たとえば建設機械や一般機械に用いられる油空圧シリンダ、自動車のショックアブソーバ等のダストシール、あるいは一般的な環付のオイルシールとしても適用可能な密封装置に関する。   The present invention relates to a sealing device that can be applied as a dust seal such as an oil / pneumatic cylinder used in construction machinery and general machinery, a shock absorber of an automobile, or a general oil seal with a ring.

一般に、ダストシールは、油空圧機器のシリンダ内部へダスト等の異物が浸入することを防止する機能を有するパッキンである。
ダストシールには、大別して、（ｉ）ＮＢＲやウレタンなどのゴム材単体のタイプのパッキン１００（図４（Ａ）参照）と、（ｉｉ）ゴム材よりなるシール本体部１１２に固定環１１１を焼き付けたタイプの環付きパッキン１１０と（図４（Ｂ）参照）、（ｉｉｉ）樹脂リング１２２とゴム状弾性材製のゴムリング１２１を組み合わせた組合せパッキン１２０で、摺動面側に樹脂リング１２２を用いたタイプの組合せパッキン（図４（Ｃ）参照）の３種類のパッキンが用いられている。 Generally, the dust seal is a packing having a function of preventing foreign matters such as dust from entering the cylinder of the hydraulic / pneumatic equipment.
The dust seal is roughly divided into (i) a packing 100 (see FIG. 4A) of a single rubber material such as NBR or urethane, and (ii) a fixed ring 111 is baked on the seal body 112 made of the rubber material. Type seal 110 with a ring (see FIG. 4B), (iii) a combination packing 120 in which a resin ring 122 and a rubber ring 121 made of a rubber-like elastic material are combined. Three types of packings of the type of combination packing used (see FIG. 4C) are used.

この中で、建設機械に代表されるダスト環境の厳しい用途には、シールの安定性を重視して、（ｉｉ）の固定環１１１を焼付けた環付きパッキン１１０を適用するのが一般的である。   Among these, for severe applications in a dust environment typified by construction machinery, it is common to apply the packing 110 with a ring in which the stationary ring 111 of (ii) is baked, with an emphasis on the stability of the seal. .

一方で、建設機械、特にブレーカーなどに代表されるダスト環境が厳しい部位で使用されるダストシールは、破損、磨耗などにより長寿命化が困難であり、しばしば定期交換部品（消耗品）として取り扱われている。   On the other hand, it is difficult to extend the service life of dust seals used in construction machinery, especially in parts with severe dust environments, such as breakers, and they are often handled as regular replacement parts (consumables). Yes.

しかし、環付きパッキンは、図４（Ｅ）に示すように、ハウジング１３０に対して、圧入治具１４０を用いて圧入して組み込む必要がある。圧入嵌合されるために、取り外しも容易ではなくなる。また、組み込み時に、プレスなどの圧入のための特殊な工具が必要となるため、建設現場や工事現場などでの補修や交換作業が困難であり、定期交換部品（消耗品）としては作業性の課題が残る。
そのため、従来は、特に消耗品としてパッキン交換頻度の高いブレーカー用途などへは、使用が見送られてきた。 However, as shown in FIG. 4E, the ring-attached packing needs to be assembled by being press-fitted into the housing 130 using the press-fitting jig 140. Since it is press-fitted, removal is not easy. In addition, since special tools for press-fitting such as presses are required at the time of assembly, repair and replacement work at construction sites and construction sites are difficult, and workability is good for regular replacement parts (consumables). Issues remain.
For this reason, in the past, use has been postponed, particularly for breaker applications where packing replacement frequency is high as a consumable item.

また、固定環１１１とハウジング１３０の金属同士を嵌合して組みつけているため、嵌合部には、金属の傾きによる隙間が生じやすく、外周側から液体状の外部ダストが浸入する可能性もある。
なお、外周からのダスト浸入については、図４（Ｄ）に示すように、外周面に副リップ１１３を設けたタイプの環付パッキン１１０′が知られているが、嵌合面に副リップ１１３を設定しているため、斜めに挿入した場合などは組み込み時にめくれたり、破損するという可能性がある。
なお、このような一般的なパッキンについては、たとえば、特許文献１，２に記載されている。 Further, since the metal of the stationary ring 111 and the housing 130 are fitted and assembled, a gap due to the inclination of the metal is likely to occur in the fitting portion, and liquid external dust may enter from the outer peripheral side. There is also.
As for dust intrusion from the outer periphery, as shown in FIG. 4 (D), a ring-shaped packing 110 ′ having a sub lip 113 provided on the outer peripheral surface is known. Therefore, if you insert it at an angle, there is a possibility that it will turn over or break during installation.
Such a general packing is described in Patent Documents 1 and 2, for example.

一方、本出願人は、図５に示すように、ダストシール１１０Ａ、１１０Ｂを２つ設け、外部空間Ａ側のダストシール１１０Ｂについて、周方向１箇所で切断し、切断部Ｃの切断端部同士の隙間が軸の径以上となるように変形させることができ、かつ外力をなくすと元の形に復元する程度の柔軟性と弾性復元力とを有する素材によって構成することで、組み込み性の改善を図ったものを提案している（特許文献３参照）。しかし、この場合には、分割部Ｃのシール性について検討する必要がある。   On the other hand, as shown in FIG. 5, the present applicant provides two dust seals 110 </ b> A and 110 </ b> B, cuts the dust seal 110 </ b> B on the outer space A side at one place in the circumferential direction, and a gap between the cut ends of the cut portion C. Can be deformed to be larger than the diameter of the shaft, and it is made of a material that has enough flexibility and elastic restoring force to restore to its original shape when the external force is removed. Have been proposed (see Patent Document 3). However, in this case, it is necessary to examine the sealing performance of the divided portion C.

実開昭５９−２２３６０号公報Japanese Utility Model Publication No.59-22360 実開平０５−８３４１０号公報Japanese Utility Model Publication No. 05-83410 特開２００８−２２３９００号公報JP 2008-223900 A

本発明は、上記した従来技術の問題点を解決するためになされたもので、その目的とするところは、従来の圧入嵌合のように圧入に使用するような特殊な工具は不要で、かつ組み込み、取り外し作業が容易にできる固定環付きの密封装置を提供することにある。   The present invention has been made to solve the above-described problems of the prior art, and the purpose thereof is to eliminate the need for a special tool used for press-fitting as in the conventional press-fitting, and An object of the present invention is to provide a sealing device with a fixed ring that can be easily assembled and removed.

上記目的を達成するために、本発明は、互いに移動自在に組み付けられる二部材間の環状隙間をシールするもので、一方の部材に固定される固定環と、該固定環に固定され他方の部材に対して摺動自在に接触するシール部材とを備えた密封装置において、前記固定環に、前記一方の部材に設けられたねじ部にねじ込み固定可能なねじ部を設けたことを特徴とする。
固定環の外部空間側に固定環を回転させるための工具が係合する工具係合部を設けることが有効である。
また、ねじ部が設けられる固定環外周部をテーパ形状とすることも有効である。
ねじ部には、シールテープを装着し、また、液状ガスケットを塗布するようにしてもよい。 In order to achieve the above-mentioned object, the present invention seals an annular gap between two members that are assembled so as to be freely movable, a fixed ring fixed to one member, and the other member fixed to the fixed ring. The sealing device includes a sealing member that is slidably in contact with the fixing ring, and the fixing ring is provided with a screw portion that can be screwed into a screw portion provided on the one member.
It is effective to provide a tool engaging portion with which a tool for rotating the fixed ring is engaged on the outer space side of the fixed ring.
It is also effective to make the outer periphery of the stationary ring provided with the threaded portion tapered.
A seal tape may be attached to the thread portion, or a liquid gasket may be applied.

本発明に係る密封装置によれば、圧入嵌合のように圧入あるいは取り外すための特殊な工具が不要で、固定環を回転させることにより、一方の部材への組み込み・取り外しが容易にでき、交換作業の作業性が向上する。   The sealing device according to the present invention does not require a special tool for press-fitting or removing, such as press-fitting, and can be easily assembled and removed from one member by rotating the stationary ring. Workability is improved.

図１（Ａ）は本発明の実施の形態に係る密封装置をハウジングに装着した状態の一例を示す要部縦断面図、同図（Ｂ）は（Ａ）の密封装置を取り出して示す要部縦断面図である。FIG. 1A is a longitudinal sectional view of an essential part showing an example of a state in which a sealing device according to an embodiment of the present invention is mounted on a housing, and FIG. 1B is an essential part of the sealing device shown in FIG. It is a longitudinal cross-sectional view. 図２は図１（Ａ）の密封装置とハウジングのねじ部を示す一部破断分解斜視図である。FIG. 2 is a partially broken exploded perspective view showing the sealing device of FIG. 図３（Ａ）は固定環に設けられるスリットを設けた密封装置の一部破断斜視図、同図（Ｂ）は同図（Ａ）のＸ方向部分矢示図、同図（Ｃ）は図１（Ｂ）の固定環の筒状部をテーパ形状とした形態を示す要部縦断面図である。3A is a partially broken perspective view of a sealing device provided with a slit provided in a stationary ring, FIG. 3B is a partial arrow view in the X direction of FIG. 3A, and FIG. It is a principal part longitudinal cross-sectional view which shows the form which made the cylindrical part of the stationary ring of 1 (B) into the taper shape. 図４（Ａ）は従来のゴム単体のパッキンの一例を示す要部縦断面図、同図（Ｂ）は従来の環付きパッキンの一例を示す要部縦断面図、同図（Ｃ）は従来の組み合わせパッキンの一例を示す要部縦断面図、同図（Ｄ）は従来の副リップを設けた環付きパッキンの一例を示す要部縦断面図、同図（Ｅ）は環付きパッキンの圧入状態を示す概略断面図である。FIG. 4A is a main part longitudinal sectional view showing an example of a conventional single rubber packing, FIG. 4B is a main part longitudinal sectional view showing an example of a conventional ring packing, and FIG. The main part longitudinal cross-sectional view which shows an example of this combination packing, the figure (D) is a principal part longitudinal cross-sectional view which shows an example of the packing with a ring which provided the conventional sublip, The figure (E) is press-fit of the packing with a ring It is a schematic sectional drawing which shows a state. 図５は従来の環付きパッキンを２連配置したダストシールの構成を示すもので、同図（Ａ）は要部縦断面図、同図（Ｂ）は固定環の分割部を示す正面図である。FIGS. 5A and 5B show the structure of a dust seal in which two conventional packings with a ring are arranged. FIG. 5A is a longitudinal sectional view of an essential part, and FIG. 5B is a front view showing a divided part of a stationary ring. .

以下に本発明を図示の実施例に基づいて詳細に説明する。ただし、以下の実施例は本発明の例示であって、実施例に記載されている構成部品の寸法、材質、形状、その相対配置
などは、特に特定的な記載がない限りは、この発明の範囲をそれらのみに限定する趣旨のものではない。 Hereinafter, the present invention will be described in detail based on illustrated embodiments. However, the following examples are illustrations of the present invention, and the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in the examples are unless otherwise specified. It is not intended to limit the scope only to them.

図１（Ａ）は本発明の実施例に係る密封装置をハウジングに装着した状態の一例を示す要部縦断面図、同図（Ｂ）は（Ａ）の密封装置を取り出して示す要部縦断面図、図２は図１（Ａ）の密封装置とハウジングのねじ部を示す一部破断分解斜視図である。   FIG. 1A is a longitudinal sectional view of an essential part showing an example of a state in which a sealing device according to an embodiment of the present invention is mounted on a housing, and FIG. 1B is a longitudinal sectional view of an essential part taken out of the sealing device of FIG. FIG. 2 is a partially broken exploded perspective view showing the sealing device of FIG.

図において、密封装置１は、互いに往復動自在に組み付けられるハウジング５０とロッド６０間の環状隙間をシールするもので、ハウジング５０内周に設けられた取付溝５１に装着されている。本実施例の密封装置１は、たとえば建設機械や一般機械に用いられる油空圧シリンダ、自動車のショックアブソーバ等のダストシールに用いられるもので、密封空間Ｆから外部空間Ａへの密封流体の流出を防止すると共に、外部空間Ａから塵埃等の異物が密封空間Ｆ側に進入しないようにシールする。   In the figure, a sealing device 1 seals an annular gap between a housing 50 and a rod 60 that are assembled so as to be reciprocally movable, and is mounted in a mounting groove 51 provided on the inner periphery of the housing 50. The sealing device 1 of this embodiment is used for dust seals such as hydraulic / pneumatic cylinders used in construction machines and general machines, shock absorbers of automobiles, etc., and discharges the sealing fluid from the sealed space F to the external space A. While preventing, it seals so that foreign materials, such as dust, may not enter the sealed space F side from the external space A.

取付溝５１は、ハウジング５０の外部空間Ａ側の端面に開いた構成で、ロッド６０が挿通されるロッド孔５３の外部空間Ａ側の端部を一段大径に拡径した構成となっている。この取付溝５１の内周面は中心軸と平行に延びる円筒形状で、雌ねじ５２が形成されている。   The mounting groove 51 is configured to open on the end surface on the outer space A side of the housing 50 and has a configuration in which the end portion on the outer space A side of the rod hole 53 through which the rod 60 is inserted is expanded to a larger diameter. . The inner peripheral surface of the mounting groove 51 has a cylindrical shape extending in parallel with the central axis, and a female screw 52 is formed.

密封装置１は、取付溝５１に固定される固定環１０と、この固定環１０に固定されロッド６０に摺動自在に接触するシール本体部２０とを備えている。
固定環１０は金属製で、円筒形状の筒状部１１と、筒状部１１の外部空間側端部から半径方向内方に向かって伸びるワッシャ状の内向きフランジ部１２とを備えた構成となっている。
筒状部１１の外周には、上記したハウジング５０の取付溝５１内周に形成された雌ねじ５２と螺合する雄ねじ１３が形成され、固定環１０が、取付溝５１にねじ込み固定されている。筒状部１１の密封空間側端部は、取付溝５１の奥端面５１ａに突き当てられている。 The sealing device 1 includes a fixed ring 10 fixed to the mounting groove 51 and a seal main body 20 fixed to the fixed ring 10 and slidably contacting the rod 60.
The stationary ring 10 is made of metal, and includes a cylindrical tubular portion 11 and a washer-shaped inward flange portion 12 extending radially inward from an outer space side end of the tubular portion 11. It has become.
On the outer periphery of the cylindrical portion 11, a male screw 13 is formed to be screwed with the female screw 52 formed on the inner periphery of the mounting groove 51 of the housing 50, and the fixing ring 10 is screwed and fixed to the mounting groove 51. The sealed space side end of the cylindrical portion 11 is abutted against the back end surface 51 a of the mounting groove 51.

組み込み時に、雄ねじ１３にシールテープが装着してもよいし、液状ガスケットを塗布してもよい。このようにすれば、外周縁からの液状ダストの浸入を防ぐことができ、ねじ嵌合部のシール性を向上させることができる。   At the time of assembly, a seal tape may be attached to the male screw 13 or a liquid gasket may be applied. If it does in this way, infiltration of the liquid dust from an outer periphery can be prevented, and the sealing performance of a screw fitting part can be improved.

シール本体部２０はゴム状弾性材で構成され、固定環１０の内周面に焼付け固定される内周ゴム部２３と、内向きフランジ部１２の密封空間側の側面に焼付け固定されるフランジ状ゴム部２４と、フランジ状ゴム部２４から密封空間Ｆ側に延びる密封空間側リップ部２１と、内向きフランジ部１２の内径端部から外部空間Ａ側に延びるダストリップ部２２と、を備えている。   The seal main body 20 is made of a rubber-like elastic material, and has an inner peripheral rubber portion 23 that is baked and fixed to the inner peripheral surface of the stationary ring 10 and a flange shape that is baked and fixed to the side surface of the inward flange portion 12 on the sealed space side. A rubber portion 24; a sealed space-side lip portion 21 extending from the flange-shaped rubber portion 24 toward the sealed space F; and a dust lip portion 22 extending from the inner diameter end of the inward flange portion 12 toward the outer space A. Yes.

密封空間側リップ部２１は、フランジ状ゴム部２４の内径端部から軸方向密封空間Ｆ側に向かって徐々に小径となるように傾斜して延び、リップ先端がロッド６０の外周面に密封状態で接触している。   The sealed space-side lip portion 21 extends so as to gradually decrease in diameter from the inner diameter end of the flange-shaped rubber portion 24 toward the axial sealed space F side, and the lip tip is sealed to the outer peripheral surface of the rod 60. In contact.

ダストリップ部２２は、内向きフランジ部１２の内径端部から軸方向外部空間Ａに向かって徐々に小径となるように傾斜して延び、リップ先端がロッド６０の外周面に密封状態で接触している。
固定環１０の外部空間側の端面である内向きフランジ部１２の外部空間側端面には、ねじ込み作業用の工具が係合する係合部としての凹部１５が設けられている。
なお、シール本体部２０の材料としては、ニトリムゴム、シリコーンゴム、ふっ素ゴム等の架橋ゴム材料だけでなく、ウレタンゴム等の熱可塑性エラストマーでもよいし、ＰＴ
ＦＥ等の樹脂材でもよい。 The dust lip portion 22 extends while inclining from the inner diameter end portion of the inward flange portion 12 so as to gradually decrease in diameter toward the axial outer space A, and the lip tip contacts the outer peripheral surface of the rod 60 in a sealed state. ing.
On the outer space side end surface of the inward flange portion 12, which is the end surface on the outer space side of the fixed ring 10, a recess 15 is provided as an engaging portion with which a tool for screwing work is engaged.
The material of the seal body 20 may be not only a crosslinked rubber material such as nitride rubber, silicone rubber or fluorine rubber, but also a thermoplastic elastomer such as urethane rubber, or PT.
A resin material such as FE may be used.

図３には、この凹部１５の一例を示している。
凹部１５は四角形状で、周方向に複数等配されている。この凹部１５に不図示の工具ヘッドの凸部を係合させて、密封装置１に回転方向のトルクを付与するようになっている。図示例では、シール本体部２０を構成するゴム材を内向きフランジ部１２の外部空間側の端面に回り込ませ、ゴム材によって凹部１５を成形している。このようにすれば、加工工数を変えずに成形することができ、加工上有利である。もっとも、内向きフランジ部１２の金属部に切削加工などによって凹部を形成してもよい。 FIG. 3 shows an example of the recess 15.
The concave portions 15 have a quadrangular shape, and a plurality of the concave portions 15 are arranged in the circumferential direction. A convex portion of a tool head (not shown) is engaged with the concave portion 15 to apply torque in the rotational direction to the sealing device 1. In the example of illustration, the rubber material which comprises the seal main-body part 20 is wound around the end surface by the side of the external space of the inward flange part 12, and the recessed part 15 is shape | molded with the rubber material. In this way, molding can be performed without changing the number of processing steps, which is advantageous in processing. But you may form a recessed part in the metal part of the inward flange part 12 by cutting.

工具係合部としては、凹部１５に限定されるものではなく、凸部であってもよく、要するに工具を回転方向にかけることができ、固定環１０に回転トルクを付与できる構成であればよい。   The tool engaging portion is not limited to the concave portion 15 and may be a convex portion. In short, any configuration may be used as long as the tool can be applied in the rotational direction and rotational torque can be applied to the stationary ring 10. .

本実施例に記載の密封装置にあっては、次のように取付け、取り外し作業を行う。
取付作業は、密封装置１の固定環１０の筒状部１１の雄ねじ１３を、ハウジング５０の取付溝５１内周の雌ねじ５２にねじ込み、最終的には不図示の工具を内向きフランジ部１２の凹部１５に係合し、筒状部１１の密封空間側端部が取付溝の奥端面５１ａに突き当て締め付け、ねじ部の締め付け力を得る。 In the sealing device described in the present embodiment, the attachment and removal operations are performed as follows.
In the mounting operation, the male screw 13 of the cylindrical portion 11 of the stationary ring 10 of the sealing device 1 is screwed into the female screw 52 on the inner periphery of the mounting groove 51 of the housing 50, and finally a tool (not shown) is attached to the inward flange portion 12. Engaging with the recess 15, the sealed space side end of the cylindrical portion 11 is abutted against and tightened against the back end surface 51 a of the mounting groove to obtain a tightening force of the screw portion.

その後、押さえ板５５をハウジング５０に固定し、密封装置１の抜け止めが図られる。図示例では、押さえ板５５は、ハウジング５０の外部空間側端面に、ねじ等によって固定されるワッシャ状部材で、その内径側端部が取付溝５１の開口部に被さって、密封装置１の外部空間側端面である固定環１０の内向きフランジ部１２に係合するようになっている。もっとも、抜け止め部材としては、押さえ板に限定されるものではなく、たとえば、取付溝５１の内周に設けた溝に弾性的に係合する抜け止めリング等、種々の構成を適用し得る。   Thereafter, the holding plate 55 is fixed to the housing 50, and the sealing device 1 is prevented from coming off. In the illustrated example, the holding plate 55 is a washer-like member fixed to the outer space side end surface of the housing 50 with a screw or the like, and the inner diameter side end portion covers the opening of the mounting groove 51, and the outside of the sealing device 1. It engages with the inward flange portion 12 of the stationary ring 10 which is the space side end face. However, the retaining member is not limited to the pressing plate, and various configurations such as a retaining ring that elastically engages with a groove provided on the inner periphery of the mounting groove 51 can be applied.

取り外し作業は、組み付け作業とは逆に、押さえ板５５を外し、内向きフランジ部１２の凹部１５に不図示の工具を係合し、取り外し方向に回転させて取り外す。   Contrary to the assembling operation, the removing operation is performed by removing the pressing plate 55, engaging a tool (not shown) with the recess 15 of the inward flange portion 12, and rotating it in the removing direction.

このように、本発明によれば、従来の圧入嵌合のように圧入あるいは取り外すための特殊な工具が不要で、固定環１０を回転させることにより、ハウジング５０への組み込み・取り外しが容易にでき、交換作業の作業性が向上する。   As described above, according to the present invention, there is no need for a special tool for press-fitting or removing as in the conventional press-fitting, and it is easy to incorporate and remove the housing 50 by rotating the stationary ring 10. The workability of the exchange work is improved.

なお、上記実施例では、雄ねじ１３が形成された固定環１０の筒状部１１が円筒形状となっているが、図３に示すように、筒状部１１がテーパ形状であってもよい。すなわち、筒状部１１の中心軸に対して平行の基準線Ｎに対して所定角度θだけ傾斜している。テーパの方向は、密封空間Ｆ側から軸方向外部空間Ａ側に向けて徐々に大径となるように傾斜する形状である。特に、図示しないが、ハウジングの取付溝の内周面も、特に図示しないが、密封空間Ｆ側から軸方向外部空間Ａ側に向けて徐々に大径となるテーパ形状とする。このようにすれば、組み込み・取り外し性を向上させ、かつ、締め付け力を大きくすることができるので、外周からの液体状のダスト浸入を防ぐことができる。   In addition, in the said Example, although the cylindrical part 11 of the stationary ring 10 in which the external thread 13 was formed becomes a cylindrical shape, as shown in FIG. 3, the cylindrical part 11 may be a taper shape. That is, it is inclined by a predetermined angle θ with respect to a reference line N parallel to the central axis of the cylindrical portion 11. The direction of the taper is a shape that is inclined so as to gradually increase in diameter from the sealed space F side toward the axial direction external space A side. Although not particularly shown, the inner peripheral surface of the mounting groove of the housing is not particularly shown, but has a tapered shape with a gradually increasing diameter from the sealed space F side toward the axial external space A side. In this way, the incorporation / removability can be improved and the tightening force can be increased, so that liquid dust intrusion from the outer periphery can be prevented.

なお、上記実施例では、固定環がハウジングにねじ込み固定され、シール本体部がロッド外周に摺接する密封装置について説明したが、本発明はこれに限定されるものではなく、固定環がロッドにねじ込み固定され、シール本体部がハウジング内周に摺接するような密封装置にも適用可能である。その場合には、固定環の内周にねじ部としての雌ねじを形成し、ロッド側にねじ部としての雄ねじを形成すればよい。   In the above embodiment, the sealing device in which the stationary ring is screwed and fixed to the housing and the seal main body is in sliding contact with the outer periphery of the rod has been described. However, the present invention is not limited to this, and the stationary ring is screwed into the rod. The present invention can also be applied to a sealing device that is fixed and in which the seal main body is in sliding contact with the inner periphery of the housing. In that case, an internal thread as a threaded portion may be formed on the inner periphery of the fixed ring, and an external thread as a threaded portion may be formed on the rod side.

また、本発明は油空圧機器のダストシールに限定されるものではなく、その他往運動する摺動部のシールとして広く適用可能である。また、往復運動する場合ではなく、回転運動する部分のシールとしても適用可能であるし、回転と往復の複合運動する部分のシールとしても適用可能である。   Further, the present invention is not limited to the dust seal of the hydraulic / pneumatic device, but can be widely applied as a seal for a sliding portion that moves forward and backward. Further, it can be applied not only as a reciprocating motion but also as a seal for a portion that rotates, or as a seal for a portion that performs a combined rotation and reciprocation.

尚、本発明の密封装置は、上記した実施例に限定されるものではなく、本発明の趣旨を逸脱しない範囲で種々の変更が可能である。   The sealing device of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

１ 密封装置
１０ 固定環
１１ 筒状部、１２ 内向きフランジ部、１３ 雄ねじ（ねじ部）
１５ 凹部
２０ シール本体部
２１ 密封空間側リップ部、２２ ダストリップ部
２３ 内周ゴム部、２４ フランジ状ゴム部
５０ ハウジング
５１ 取付溝、５１ａ 奥端面、５２ 雌ねじ（ねじ部）
５３ ロッド孔、５５ 抜け止め部材
６０ ロッド
１１０，１１０′ 環付パッキン、１１１ シール本体部、１１２ 固定環、
１１３ 副リップ
１２０ 組合せパッキン、１２１ 樹脂リング、１２２ ゴムリング
１３０ ハウジング
Ａ 外部空間
Ｆ 密封空間 DESCRIPTION OF SYMBOLS 1 Sealing device 10 Fixed ring 11 Cylindrical part, 12 Inward flange part, 13 Male thread (screw part)
15 Recess 20 Seal body portion 21 Sealed space side lip portion, 22 Dustrip portion 23 Inner peripheral rubber portion, 24 Flange-shaped rubber portion 50 Housing 51 Mounting groove, 51a Back end surface, 52 Female thread (thread portion)
53 Rod hole, 55 Retaining member 60 Rod 110, 110 'Packing with ring, 111 Seal body, 112 Fixed ring,
113 Sub lip 120 Combination packing, 121 Resin ring, 122 Rubber ring 130 Housing A External space F Sealed space

Claims (3)

互いに移動自在に組み付けられる二部材間の環状隙間をシールするもので、一方の部材に固定される固定環と、該固定環に固定され他方の部材に摺動自在に接触するシール本体部とを備えた密封装置において、
前記固定環に、前記一方の部材に設けられたねじ部にねじ込み固定可能なねじ部を設けたことを特徴とする密封装置。 Sealing an annular gap between two members that are movably assembled with each other, and a fixed ring fixed to one member and a seal main body fixed to the fixed ring and slidably contacting the other member In the sealing device provided,
The sealing device according to claim 1, wherein a screw portion capable of being screwed and fixed to a screw portion provided on the one member is provided on the stationary ring. 固定環の密封対象側の端部に、固定環を回転させるための工具が係合する工具係合部が設けられていることを特徴とする請求項１に記載の密封装置。 The sealing device according to claim 1, wherein a tool engagement portion with which a tool for rotating the stationary ring is engaged is provided at an end of the stationary ring on the sealing target side. 固定環がテーパ形状となっている請求項１又は２に記載の密封装置。 The sealing device according to claim 1, wherein the stationary ring has a tapered shape.
JP2009090424A 2009-04-02 2009-04-02 Sealing device Withdrawn JP2010242814A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2399729A1 (en) * 2010-08-10 2013-04-03 Carl Freudenberg Kg Radial shaft sealing ring has supporting body, where sealing lip is arranged, and form-fit elements are formed as cam, which protrudes in radial direction or in axial direction
CN103244683A (en) * 2013-05-23 2013-08-14 张家港市三利密封合金材料有限公司 Sealing ring with inner screw thread
JP2018162842A (en) * 2017-03-27 2018-10-18 Nok株式会社 Sealing device and seal member used for the same
JP2020090998A (en) * 2018-12-06 2020-06-11 Nok株式会社 Sealing device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2399729A1 (en) * 2010-08-10 2013-04-03 Carl Freudenberg Kg Radial shaft sealing ring has supporting body, where sealing lip is arranged, and form-fit elements are formed as cam, which protrudes in radial direction or in axial direction
CN103244683A (en) * 2013-05-23 2013-08-14 张家港市三利密封合金材料有限公司 Sealing ring with inner screw thread
JP2018162842A (en) * 2017-03-27 2018-10-18 Nok株式会社 Sealing device and seal member used for the same
JP2020090998A (en) * 2018-12-06 2020-06-11 Nok株式会社 Sealing device
JP7246905B2 (en) 2018-12-06 2023-03-28 Nok株式会社 sealing device

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