JPS6039909B2 - U-packet for hydraulic cylinder - Google Patents

U-packet for hydraulic cylinder

Info

Publication number
JPS6039909B2
JPS6039909B2 JP52160739A JP16073977A JPS6039909B2 JP S6039909 B2 JPS6039909 B2 JP S6039909B2 JP 52160739 A JP52160739 A JP 52160739A JP 16073977 A JP16073977 A JP 16073977A JP S6039909 B2 JPS6039909 B2 JP S6039909B2
Authority
JP
Japan
Prior art keywords
lip
heel portion
heel
inner circumferential
ram
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP52160739A
Other languages
Japanese (ja)
Other versions
JPS5493749A (en
Inventor
鉄三 多小谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Tire Corp
Original Assignee
Toyo Tire and Rubber Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Tire and Rubber Co Ltd filed Critical Toyo Tire and Rubber Co Ltd
Priority to JP52160739A priority Critical patent/JPS6039909B2/en
Publication of JPS5493749A publication Critical patent/JPS5493749A/en
Publication of JPS6039909B2 publication Critical patent/JPS6039909B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Sealing With Elastic Sealing Lips (AREA)

Description

【発明の詳細な説明】 本発明は、ェレベータ用等の如く重量物を垂直方向に支
持し且つこれを上下方向に移動させるために用いられる
油圧シリンダ用Uパッキンの改良に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a U-packing for a hydraulic cylinder used for vertically supporting a heavy object such as an elevator and moving it vertically.

例えば第1図に示すように油圧シリンダAを地盤B中に
埋設し、ラムRによってェレベータ等の昇降ケージCを
ガイド支柱Dに沿って昇降させる際に、シリンダグラン
ド側シリンダカバーEにラムRの摺動面に対応して断面
略U形状をなす所謂UパッキンF(グランドパツキン)
を設ける必要があるが、従釆にあってはこの種油圧駆動
方式はカーリフト等荷物専用のェレベータに適用される
のが大半を占め、乗用としてのェレベータに適用される
ことは希であった。
For example, as shown in Fig. 1, when a hydraulic cylinder A is buried in the ground B and a lifting cage C such as an elevator is raised or lowered along a guide column D by the ram R, the ram R is placed on the cylinder cover E on the cylinder ground side. The so-called U packing F (grand packing) has a roughly U-shaped cross section corresponding to the sliding surface.
However, this type of hydraulic drive system was mostly applied to elevators exclusively for cargo such as car lifts, and was rarely applied to elevators for passenger use.

これは次の理由による。即ち、上述のように昇降ケージ
Cはガイド支柱Dに沿って昇降され、この際このガイド
支柱○の蓬付誤差を吸収するためにラムRとシリンダカ
バーEとの間にはある程度の間隙余裕を設け、これをU
パッキンFで補填するようにしているが、従来にあって
は上記余裕に対するラムRの偏崎力がUパッキンFに作
用するとき、ラムRに摺接するUパッキン内周面のうち
その全域がラムRに接触するためラムRに対する摩擦抵
抗が必要以上に高まり、特に静止時の静摩擦抵抗が昇降
時の動摩擦抵抗に比べて大幅に増大し、静止状態にある
とき昇降ケージCが静摩擦抵抗に抗して起動するときに
衝撃的に移動を開始することになり、これがために従来
にあってはこの種Uパッキンを使用したェレベータは乗
用として適さないという難点があつた。
This is due to the following reason. That is, as mentioned above, the elevator cage C is raised and lowered along the guide column D, and at this time, a certain amount of clearance is provided between the ram R and the cylinder cover E in order to absorb the error in lowering the guide column ○. and set this as U
This is compensated for by packing F, but conventionally, when the eccentric force of ram R against the above margin acts on U packing F, the entire area of the inner circumferential surface of U packing that is in sliding contact with ram R is covered by the ram. Since the ram R is in contact with the ram R, the frictional resistance against the ram R increases more than necessary, and in particular, the static frictional resistance when it is stationary increases significantly compared to the dynamic frictional resistance when lifting and lowering. When the elevator is started up, the elevator begins to move abruptly, and this has caused a problem in the past that elevators using this type of U-packing are not suitable for passenger use.

本発明は、上述のような難点を一挙に解決し得る画期的
なUパッキンを提供しようとするものである。
The present invention aims to provide an innovative U-packing that can solve the above-mentioned difficulties all at once.

本発明の一実施例を第2図以下の図面によって説明する
と、Uパツキン本体1はニトリルゴム等のパッキン材料
からなり、通常のUパツキンのように内外両リップ部2
,3とその基部のヒール部4とからなっており、該Uパ
ッキン本体1の内周面及び外周面は内外両リップ部2,
3からヒール部4に向って漸次肉薄になるようなテーパ
面5,6に形成されている。上記内外両リップ部2,3
のうち、内周側リップ部2の下緑内周を上記テーパ面5
に連続してやや突出状の曲面(アール)をなすアールリ
ップ綾部7に形成しており、更に内周側リップ部2のア
ールリップ綾部7の背部相当個所に全周にわたりコイル
ばね隊着溝8が凹入形成され、これにエンドレスなコイ
ルばね9が欧着され、前記アールリップ縁部7を通常ラ
ムRとの摺綾側たる内周側に押圧付勢するようになって
いる。
One embodiment of the present invention will be explained with reference to the drawings below in FIG.
, 3 and a heel portion 4 at the base thereof, and the inner and outer peripheral surfaces of the U packing body 1 have both inner and outer lip portions 2,
The tapered surfaces 5 and 6 are formed so as to become gradually thinner from the heel portion 3 toward the heel portion 4. Both inner and outer lips 2 and 3 above
The lower green inner periphery of the inner lip portion 2 is connected to the tapered surface 5.
The rounded lip twill part 7 is formed to form a slightly protruding curved surface (R) continuously, and furthermore, a coil spring platting groove 8 is formed around the entire circumference at a portion corresponding to the back of the rounded lip twill part 7 of the inner circumference side lip part 2. An endless coil spring 9 is attached to the concave portion, and the rounded lip edge portion 7 is normally pressed toward the inner circumferential side, which is the sliding side with respect to the ram R.

また上記ヒール部4の上緑内周角部を幅(肉厚)方向に
切欠して切欠段部10を形成し、該切欠段部10に摩擦
係数(抵抗)の小さい、たとえば四協化樹脂(テフロン
)、ナイロン等の硬質樹脂からなる扇平なバックアップ
リング11が鉄着される。この際、バックアップリング
11の先端面11′はヒール部4の内周面から突出して
おり、具体的には該先端面11′の内径が前記内周測り
ップ部2のアールリップ緑部7の内蓬とほぼ一致する程
度に突出している。更に前記硬質バックアップリング1
1の幅方向に対応する位置のヒール部4の外周には外周
側テーパ面6より突出して***部12が一体的に形成さ
れる。そして内周側リップ部2のアールリップ縁部7か
らこれに続く内周側テーパ面5及び前記切欠段部1川こ
至るUパッキン本体1に内周側全域において該内周表面
近くにキャンバス生地の如き布帯13,13が一体埋入
されている。この埋入布寅の数は図面では一点鎖線で示
すように2枚になっているが、特に限定されるものでは
ない。尚図中17はスクレーパである。かく構成された
本発明に係るUパッキン14は、第3図に示すように、
油圧シリンダAのシリンダカバーEに設けたパツキン隊
着溝15に競着され、この状態において硬質バックアッ
プリング11の先端面11′がラムR周面に摺接され、
且つ内周側リップ部2のアールリップ縁部7がコィルば
ね9に付勢されてラムR周面に礎接され、また外周側リ
ップ部3の最大径部にあたる外周下縁部16でシリンダ
カバーE側とのシール作用を果すようになっている。
Further, the upper green inner circumferential corner portion of the heel portion 4 is notched in the width (thickness) direction to form a notched stepped portion 10, and the notched stepped portion 10 is made of a material having a low coefficient of friction (resistance), such as a material made of a material such as Shikyouka resin. A fan-flat backup ring 11 made of hard resin such as Teflon (Teflon) or nylon is iron-bonded. At this time, the tip surface 11' of the backup ring 11 protrudes from the inner circumferential surface of the heel portion 4, and specifically, the inner diameter of the tip surface 11' It is protruding to the extent that it almost matches that of the Uchibō. Furthermore, the hard backup ring 1
A raised portion 12 is integrally formed on the outer periphery of the heel portion 4 at a position corresponding to the width direction of the heel portion 1 so as to protrude from the outer peripheral side tapered surface 6. Then, the U-packing body 1 from the rounded lip edge 7 of the inner lip portion 2 to the inner tapered surface 5 and the notch step 1 is covered with canvas fabric near the inner surface over the entire inner circumferential area. Cloth bands 13, 13 such as these are integrally embedded. Although the number of embedded cloths is two in the drawing as shown by the dashed line, it is not particularly limited. Note that 17 in the figure is a scraper. As shown in FIG. 3, the U-packing 14 according to the present invention thus configured has the following features:
The hard backup ring 11 is brought into contact with the packing groove 15 provided in the cylinder cover E of the hydraulic cylinder A, and in this state, the tip surface 11' of the hard backup ring 11 is brought into sliding contact with the circumferential surface of the ram R.
In addition, the rounded lip edge 7 of the inner lip 2 is urged by the coil spring 9 and comes into contact with the circumferential surface of the ram R, and the lower outer edge 16 corresponding to the maximum diameter of the outer lip 3 is attached to the cylinder cover. It is designed to perform a sealing action with the E side.

従って本発明によれば、内周側リップ部2の内周面に布
岳13が一体埋入されているため、表面には布富13の
織目が微小な粗面として現出し、これがオイルポケット
の役割を果すことになり、且つ内周側リップ部2の下縁
内周をアールリップ綾部7に形成することによって、ラ
ムR周面の油膜を全てそぎ落すことがなくなり、比較的
厚い油膜を形成することになり、ラムRの移動途中にお
けるスティックスリップ(ひびり現像)を極力小さく抑
えることができ、またUパツキン本体内周面の布寅埋入
による硬さと内周側リップ部の内周下緑をアールリップ
縁部7に形成したこととによってラムRの継ぎ足し部分
の段差に良好に追従する効果があり、更には布幕13を
Uパッキン本体1の内周面全域に埋入することによって
、特に内周側リップ部2のアールリップ緑部7のラムR
‘こ対する弾性力が若干不足することになるが、本発明
においてはコイルばね9でアールリップ縁部7をラムR
周面に常時押圧して上記弾性力を補償するようにしてい
るからシール性はなんら損われることはないという効果
がある。
Therefore, according to the present invention, since the cloth ridges 13 are integrally embedded in the inner circumferential surface of the inner peripheral side lip portion 2, the texture of the cloth ridges 13 appears on the surface as a minute rough surface, which is oily. By forming the inner periphery of the lower edge of the inner lip part 2 into the R lip twill part 7, the oil film on the circumferential surface of the ram R is not completely scraped off, and a relatively thick oil film is formed. As a result, stick-slip (crack development) during the movement of the ram R can be suppressed to a minimum, and the hardness due to the fabric embedding on the inner circumference of the U packing body and the inner circumference of the inner lip can be minimized. By forming the lower circumferential green on the R lip edge 7, it has the effect of well following the step of the added portion of the ram R, and furthermore, the cloth curtain 13 is embedded in the entire inner circumferential surface of the U packing body 1. In particular, the ram R of the round lip green portion 7 of the inner lip portion 2
Although the elastic force against the ram R is slightly insufficient, in the present invention, the coil spring 9 is used to connect the R lip edge 7 to the ram R.
Since the circumferential surface is constantly pressed to compensate for the above elastic force, there is an effect that the sealing performance is not impaired in any way.

そして本発明の最大の特徴とする点は、Uパッキン本体
1内周側全域にいて布幕13を一体埋入して該布入り切
欠段部10‘こ接着され、その先端面11′がヒール部
4の内周側テーパ面5より突出した硬質バックアップリ
ング11と、内周側リップ部2の布入りアールリップ縁
部7とをラムRに対する摺援面としたことである。
The most distinctive feature of the present invention is that a cloth curtain 13 is integrally embedded in the entire inner peripheral side of the U-packing body 1 and is bonded to the cloth-filled notch step 10', and its tip surface 11' is attached to the heel. The hard backup ring 11 protruding from the inner tapered surface 5 of the portion 4 and the cloth-filled rounded lip edge 7 of the inner lip portion 2 are used as sliding surfaces for the ram R.

これがためラムRに対する摺嬢面積が小さく、それだけ
摺動摩擦抵抗が軽減される。そして最も注目すべきこと
は上記硬質バックアップリング11とアールリップ緑部
7とは布幕13入りの硬質内周面によって夫々の関係位
置が常に保持されていることである。従ってラムRの偏
椅力によって硬質バックアップリング11を外周側に押
圧し、その先端面11′をヒール部4内に没入させよう
とする力が働いても、硬質バックアップリング11とヒ
ール部内周側テーパ面5とは硬質の布岳13で一体的で
受けられているから硬質バックアップリング11に追従
してヒール部内周側テーパ面5も関連移動し、該内周側
テーパ面5がラムR周面に摺接することがなく、常に硬
質バックアップリング11をヒ−ル部内周側テーパ面5
からの突出状態を維持して摺動摩擦抵抗の増大を阻止し
ている。そしてこれら硬質バックアップリング11とヒ
ール部内周側テーパ面5との関連移動量はヒール部4の
外周に突設した陸起部12の弾性変形によって吸収する
ようになっている。この点従来のUパツキンにあっては
ラムRの偏俺力によって前述のようにUパッキンの内周
面全域がラム周面に摺接し、摺動摩擦抵抗の増大の原因
となっていた。従って第1図のガイド支柱Dの蓬付誤差
によるラムRの偏俺力が本発明のUパッキンに作用して
も、上述のように常にラムR周面は硬質バックアップリ
ング11の先端面11′とアールリップ緑部7とで港後
保持されており、而も該バックアップリング11は四孫
化樹脂のような自己潤滑性が良く摩擦係数の小さい硬質
樹脂で形成されているため、ラムRを円滑に摺動させる
ことができる。以上のように本発明によれば従来のこの
種Uバッキンの難点を大幅に改善することになるから、
冒頭に述べたようにェレベータ等の大重量物支持用とし
ての油圧シリンダに本発明に係るUパッキンを採用すれ
ば極めて良好な成果を上げることができる。
Therefore, the sliding area against the ram R is small, and the sliding friction resistance is reduced accordingly. What is most noteworthy is that the hard backup ring 11 and the round lip green portion 7 are always maintained in their respective relative positions by the hard inner circumferential surface covered with the cloth curtain 13. Therefore, even if a force is applied to press the hard backup ring 11 toward the outer periphery by the eccentric force of the ram R and cause the tip end surface 11' to sink into the heel portion 4, the hard backup ring 11 and the inner periphery of the heel portion Since the tapered surface 5 is integrally supported by the hard cloth mount 13, the inner tapered surface 5 of the heel part also moves in relation to the hard back-up ring 11, and the inner tapered surface 5 moves along the ram R circumference. The hard backup ring 11 is always attached to the tapered surface 5 on the inner peripheral side of the heel portion without sliding on the surface.
This maintains the protruding state from above to prevent an increase in sliding frictional resistance. The amount of relative movement between the hard backup ring 11 and the tapered surface 5 on the inner peripheral side of the heel portion is absorbed by the elastic deformation of the raised portion 12 protruding from the outer periphery of the heel portion 4. In this regard, in the conventional U-packing, the entire inner circumferential surface of the U-packing comes into sliding contact with the ram circumferential surface due to the biasing force of the ram R, causing an increase in sliding frictional resistance. Therefore, even if the biasing force of the ram R due to the mounting error of the guide post D shown in FIG. The back-up ring 11 is made of a hard resin with good self-lubricating properties and a small coefficient of friction, such as Shisonka resin, so that the ram R is It can be slid smoothly. As described above, according to the present invention, the drawbacks of conventional U-backings of this type are greatly improved.
As mentioned at the beginning, if the U-packing according to the present invention is employed in a hydraulic cylinder for supporting a large heavy object such as an elevator, extremely good results can be achieved.

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

第1図は本発明に係るUパッキンを用いる油圧シリンダ
の一使用例を示す図、第2図は本発明に係るUパッキン
の縦断面図、第3図は同パッキンの油圧シリンダに対す
る装着状態を示す縦断面図である。 1……Uパッキン本体、2……内周側リップ部、3・…
・・外周側リップ部、4・・・・・・ヒール部、7・・
・・・・アールリップ緑部、9・・・・・・環状ばね部
材、10…・・・切欠段部、11・・・・・・硬質バッ
クアップリング、11′……硬質バックアップリングの
先端面、12・・・・・・***部、13・・・・・・布
用。 ※燐数協 象麹
Fig. 1 is a diagram showing an example of the use of a hydraulic cylinder using the U-packing according to the present invention, Fig. 2 is a longitudinal cross-sectional view of the U-packing according to the present invention, and Fig. 3 shows how the packing is attached to the hydraulic cylinder. FIG. 1... U packing body, 2... Inner circumference side lip part, 3...
...Outer lip part, 4...Heel part, 7...
... R lip green part, 9 ... Annular spring member, 10 ... Notch step, 11 ... Hard backup ring, 11' ... Tip surface of hard backup ring , 12... Raised portion, 13... For cloth. *Rin number symbiotic koji

Claims (1)

【特許請求の範囲】[Claims] 1 二叉状に分岐した内外両リツプ部とその基部である
ヒール部とからなるUパツキン本体において、該Uパツ
キン本体1の内周面及び外周面を内外両リツプ部2,3
からヒール部4に向つて漸次肉薄になるようなテーパ面
5,6に形成し、内外周側両リツプ部2,3のうち内周
側リツプ部2の外周に該内周側リツプ部を摺接面たる内
周側に押圧付勢する環状ばね部材9を圧嵌すると共に該
内周側リツプ部2の下縁内周をアール状に形成してアー
ルリツプ縁部7となし、前記ヒール部4の上縁内周角部
を幅方向に切欠して切欠段部10を形成し、上記アール
リツプ縁部7、内周側テーパ面5及び該切欠段部10に
至るUパツキン本体内周面全域に布帛13を一体埋設し
、該布帛13を埋設した切欠段部10に、その先端部1
1′がヒール部4の内周側テーパ面5よりやや突出する
ようにした摩擦係数の小さい硬質バツクアツプリング1
1を嵌着し、該硬質バツクアツプリングに対応するヒー
ル部外周面に***部12を一体成形してなる油圧シリン
ダ用Uパツキン。
1 In a U packing body consisting of both inner and outer lips branched into a bifurcated shape and a heel portion that is the base thereof, the inner and outer circumferential surfaces of the U packing body 1 are connected to the inner and outer lips 2 and 3.
The tapered surfaces 5 and 6 are formed so that they gradually become thinner from the heel portion 4 toward the heel portion 4, and the inner lip portion is slid on the outer periphery of the inner lip portion 2 of both the inner and outer lip portions 2 and 3. An annular spring member 9 is press-fitted to the inner circumferential side which is the contact surface, and the inner circumference of the lower edge of the inner circumferential lip portion 2 is formed into a rounded shape to form a rounded lip edge portion 7, and the heel portion 4 A notch step 10 is formed by notching the inner circumferential corner of the upper edge in the width direction, and the entire inner circumferential surface of the U packing body up to the round lip edge 7, the inner circumferential tapered surface 5, and the notch step 10 is formed. The fabric 13 is buried integrally, and the tip end 1 is inserted into the cutout step 10 in which the fabric 13 is buried.
A hard back-up spring 1 with a small coefficient of friction in which a portion 1' of the heel portion 4 slightly protrudes from the inner tapered surface 5 of the heel portion 4.
1, and a raised part 12 is integrally molded on the outer peripheral surface of the heel part corresponding to the hard back-up spring.
JP52160739A 1977-12-29 1977-12-29 U-packet for hydraulic cylinder Expired JPS6039909B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52160739A JPS6039909B2 (en) 1977-12-29 1977-12-29 U-packet for hydraulic cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52160739A JPS6039909B2 (en) 1977-12-29 1977-12-29 U-packet for hydraulic cylinder

Publications (2)

Publication Number Publication Date
JPS5493749A JPS5493749A (en) 1979-07-25
JPS6039909B2 true JPS6039909B2 (en) 1985-09-07

Family

ID=15721399

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52160739A Expired JPS6039909B2 (en) 1977-12-29 1977-12-29 U-packet for hydraulic cylinder

Country Status (1)

Country Link
JP (1) JPS6039909B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015232371A (en) * 2014-06-10 2015-12-24 ニッタ株式会社 Seal material and seal mechanism

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5084661U (en) * 1973-12-10 1975-07-19
JPS5161460U (en) * 1974-10-25 1976-05-14
JPS5189961U (en) * 1975-01-14 1976-07-19

Also Published As

Publication number Publication date
JPS5493749A (en) 1979-07-25

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