JP3694184B2 - Saddle faucet gasket - Google Patents

Saddle faucet gasket Download PDF

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Publication number
JP3694184B2
JP3694184B2 JP03464899A JP3464899A JP3694184B2 JP 3694184 B2 JP3694184 B2 JP 3694184B2 JP 03464899 A JP03464899 A JP 03464899A JP 3464899 A JP3464899 A JP 3464899A JP 3694184 B2 JP3694184 B2 JP 3694184B2
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Japan
Prior art keywords
saddle
pipe
gasket
groove
water faucet
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JPH11344189A (en
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隆一 米田
宏昭 坂本
親徳 福井
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Kubota Corp
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Kubota Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L41/00—Branching pipes; Joining pipes to walls
    • F16L41/02—Branch units, e.g. made in one piece, welded, riveted

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints With Pressure Members (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Description

【０００１】
【産業上の利用分野】
この発明は、サドル付分水栓用ガスケットに関し、特にたとえばサドル付分水栓と管との接合部を止水するためにサドル付分水栓に装着される、サドル付分水栓用ガスケットに関する。
【０００２】
【従来の技術】
図８に示す一般的なサドル付分水栓１は、管２の外面にボルト・ナット３で固定されるサドル１ａとサドル１ａにねじ接合される分水栓１ｂとを含み、サドル１ａにおける分水栓取付口４の下部には、図９からよくわかるように、断面略矩形状のサドル付分水栓用ガスケット（以下、単に「ガスケット」という。）５が装着される。そして、このサドル付分水栓１を管２の外面に装着すると、ボルト・ナット３の締着力によってガスケット５が管２の外面に圧接され、それによって、サドル付分水栓１と管２との接合部が止水される。
【０００３】
【発明が解決しようとする課題】
従来のガスケット５（図８，図９）は、鋳鉄製管またはポリ塩化ビニル（ＰＶＣ）管等のような比較的硬質の管２に適用することを前提として開発されたものであり、ガスケット５を管２の外面に強く圧接させるために、ガスケット５の圧縮代を大きくして面圧を高くしていた。そのため、たとえばポリエチレン（ＰＥ）管等のような軟質の管２にこれを適用した場合には、図９中の仮想線（二点鎖線）で示すように、ガスケット５の復元力によって管２が経時的に内側へ変形されてしまい、特に低水圧下において止水機能が損なわれる恐れがあった。
【０００４】
この問題を解決する一手段として、ガスケット５に代えて、Ｏリングを用いることが考えられる。Ｏリングによると、圧縮代を小さくして面圧を低くすることができるため、管２が軟質管（ポリエチレン管等）であっても、その変形を防止できる。しかしながら、Ｏリングでは水圧が高くなったときに止水性を保持することが困難であった。また、たとえば地盤変動によって管２が湾曲された場合には、その湾曲にＯリングが追従しないため、止水性を保持することができなかった。
【０００５】
それゆえに、この発明の主たる目的は、軟質管に適用した場合でも止水性を確実に保持できる、ガスケットを提供することである。
【０００６】
【課題を解決するための手段】
この発明は、サドル付分水栓と管との接合部を止水するためにサドル付分水栓に装着されるサドル付分水栓用ガスケットであって、管に形成された分岐孔の周囲において管の外面に圧接される環状の本体、本体の内周面に形成される溝、および溝の上面および下面の少なくとも一方に周方向に間隔を隔てて形成される複数の突部を備え、本体は溝の下面を構成する板状のリップ部を含む、サドル付分水栓用ガスケットである。
【０００７】
【作用】
サドル付分水栓を管の外面に取り付けると、ガスケットのリップ部が管の外面に圧接されて溝が閉じられる。この場合でも、溝の上面および下面の少なくとも一方に形成された突部がスペーサとして機能するため、溝内には常に空間が確保される。また、複数の突部は間隔を隔てて形成されるため、突部の間には溝内の空間と連通する開口が確保される。したがって、通水時には、この開口を通して溝の奥部にまで水が入り込み、溝の下面すなわちリップ部の上面に水圧が作用する。
【０００８】
【発明の効果】
この発明によれば、リップ部の上面に水圧を作用させることによって、リップ部を管の外面に圧接させることができるので、リップ部の圧縮代を小さくして面圧を低くしても十分な止水性を得ることができる。したがって、ガスケットの復元力によって管（軟質管）が経時的に変形するのを防止でき、止水性を確実に保持できる。また、複数の突部によってリップ部を管の外面に押圧することができるので、水圧が低い場合でも、止水性を保持できる。
【０００９】
そして、リップ部を溝の開口端へ向かうに従って下方へ傾斜させると、リップ部の復元幅を大きくすることができるので、たとえば地盤変動によって管が湾曲された場合でも、リップ部を管の湾曲に追従させることができる。また、溝の上面の少なくとも開口側端縁を管の外面に沿うように湾曲させると、管の外面においてガスケットを安定させることができる。さらに、溝の上面全体を管の外面に沿うように湾曲させると、溝の下面と上面との間で突部の全てを均等に圧縮することができる。
【００１０】
また、リップ部の平面視内周形状を管の軸方向を長径とする楕円状または長円状に設定すると、リップ部を管の外面に圧接した状態でその内周形状を真円にすることができるので、リップ部４４に張力を均一に作用させることができる。したがって、不均一な張力によるリップ部の浮き上がりを抑制できる。
この発明の上述の目的，その他の目的，特徴および利点は、図面を参照して行う以下の実施例の詳細な説明から一層明らかとなろう。
【００１１】
【実施例】
図１および図２に示すこの実施例のガスケット１０は、図３および図４に示すように、ポリエチレン，ポリブテンまたはポリプロピレン等のような軟質材料からなる管１２とサドル付分水栓１４との接合部を止水するために、サドル付分水栓１４に装着されるものである。
【００１２】
サドル付分水栓１４（図３，図４）は、管１２の外面に固定されるサドル部１６と、図示しない分岐管が接合される分水栓１８とを含む。サドル部１６は、上側部分１６ａと下側部分１６ｂとを含み、これらの周方向両端部には、ボルト・ナット２０を取り付けるための取付部２２が形成される。そして、上側部分１６ａの中央部には孔２４が形成され、孔２４の周縁部から立ち上がって分水栓取付口２６が形成される。さらに、分水栓取付口２６の下部内周面にはガスケット受容部２８が形成され、上部内周面には雌ねじ３０が形成される。一方、分水栓１８は、内部に逆Ｌ字状の通水路が形成された本体３２を含み、本体３２の下部（通水路の一端）には第１接続口３４が形成され、側部（通水路の他端）には第２接続口３６が形成され、第１接続口３４の外周面には雄ねじ３８が形成される。そして、サドル部１６のガスケット受容部２８にガスケット１０が装着され、サドル部１６の雌ねじ３０と分水栓１８の雄ねじ３８とが螺合される。
【００１３】
ガスケット１０（図１，図２）は、ゴム等のような弾性材料からなる環状の本体４０を含む。本体４０の外径はガスケット受容部２８の内径とほぼ同じサイズに設定され、本体４０の内径は管１２に形成される分岐孔１４ａの口径よりも大きく設定される。また、本体４０の外周部の高さはガスケット受容部２８の深さよりもやや高めに設定される。そして、本体４０の内周面にはコ字状の溝４２が形成され、本体４０のうち溝４２の下面を構成する部分がリップ部４４となる。
【００１４】
リップ部４４は、後述する突部４６からの押圧力とそれ自体の復元力と水圧とによって管１２の外面に圧接される部分であり、止水機能を有効に発揮するために、所定の復元力を得る程度の剛性と管１２の外面に沿う程度の変形容易性とを併有する必要がある。そのため、リップ部４４は、溝４２の開口端側へ向かうに従って下方へ傾斜されるとともに、開口端側へ向かうに従って薄くなる板状に形成される。すなわち、リップ部４４を傾斜させることによって所定の弾性変形角θが確保され、リップ部４４の基部を厚くすることによって所定に剛性が確保され、リップ部４４の先端部を薄くすることによって変形容易性が確保される。なお、図１（Ｂ）では、リップ部４４は傾斜されていないが、この部分（ＩＢ−ＩＢ線断面部）においては、リップ部４４が水平であっても所定の弾性変形角θが確保されるので問題はない。つまり、リップ部４４の傾斜角は、管１２の管壁との関係において相対的に設定される。
【００１５】
また、溝４２の上面の開口側端縁は管１２の外面に沿うように湾曲され、溝４２の上面には、略半円状の断面を有する複数（この実施例では８個）の突部４６が周方向に間隔を隔てて形成される。ただし、突部４６は、溝４２の下面すなわちリップ部４４の上面に形成されてもよいし、溝４２の上下両面に形成されてもよい。
【００１６】
そして、本体４０の上面内周縁には、略半円状の断面を有する環状突部４８が形成さる。したがって、サドル部１６に分水栓１８を接合すると、分水栓１８の下端面が環状突部４８に圧接され、それによって、サドル部１６と分水栓１８との接合部が止水される。
ガスケット１０（図１，図２）が装着されたサドル付分水栓１４（図３）をボルト・ナット２０を用いて管１２の外面に固定すると、ボルト・ナット２０の締着力によってガスケット１０が圧縮され、リップ部４４の下面が管１２の外面に圧接されて接合部が止水される。ガスケット１０が圧縮された状態では、図５に示すように、溝４２が閉じられるが、溝４２の内面に形成された複数の突部４６がスペーサとして機能するため、溝４２内には高さαの空間が確保される。また、複数の突部４６は溝４２の内面に間隔を隔てて形成されているため、突部４６の間には、開口５０（図５）が確保される。したがって、管１２およびサドル付分水栓１４を含む管路に通水した際には、開口５０を通して溝４２の奥部にまで水が入り込み、リップ部４４の上面に水圧が作用する。
【００１７】
この実施例によれば、リップ部４４の上面に水圧を作用させることによって、リップ部４４を管１２の外面に圧接する力を補うことができるので、ガスケット１０の圧縮代を小さくして面圧を低くすることができる。したがって、ガスケット１０の復元力による軟質管１２の経時的な変形を防止でき、止水性を保持できる。また、水圧が低い場合でも、複数の突部４６によってリップ部４４を管１２の外面に押圧することができ、しかも、リップ部４４の薄肉の先端部を管１２の外面に密着させることができるので、止水性を保持できる。さらに、地盤変動等によって管１２が湾曲された場合でも、その湾曲に追従してリップ部４４が弾性変形されるので、止水性を保持できる。また、溝４２の上面の少なくとも開口側端縁を管１２の外面に沿うように湾曲させているので、管１２の外面においてガスケット１０を安定させることができる。
【００１８】
図６に示す他の実施例のガスケット５２では、溝４２の上面およびリップ部４４の上下両面が管１２の外面に沿うように湾曲される。また、リップ部４４の平面視内周形状（図６（Ａ））が、VIＢ−VIＢ線方向を短径とし、VIＣ−VIＣ線方向を長径とした楕円状または長円状に設定される。そして、溝４２の上面および下面の少なくとも一方には周方向に間隔を隔てて複数の突部４６が形成される。
【００１９】
この実施例によれば、図７に示すように、溝４２の上面の曲率中心と管１２の外面の曲率中心とが一致するため、溝４２の上面と下面（リップ部４４の上面）との間で複数の突部４６を均等に圧縮でき、複数の突部４６の全てから同じ大きさで、かつ、管１４の中心へ向かう復元力Ｆを得ることができる。したがって、リップ部４４をその全周にわたって均等な力で管１２の外面に圧接させることができ、接合部をむらなく確実に止水できる。
【００２０】
また、リップ部４４の内周形状を楕円状または長円状に設定しているので、リップ部４４が管１４の外面に圧接された状態では、その内周形状が真円となる。つまり、図６（Ｂ）に示された部分すなわち短径部分が管１４の外面に圧接されると、リップ部４４が斜めになるため、短径が拡大される。一方、図６（Ｃ）に示された部分すなわち長径部分が管１４の外面に圧接されると、リップ部４４が水平になるため、長径が縮小される。その結果、リップ部４４の全体として内周形状が真円となる。したがって、リップ部４４に張力を均一に作用させることができ、不均一な張力によるリップ部４４の浮き上がりを抑制できる。
【００２１】
なお、リップ部４４の浮き上がりを抑制するために、リップ部４４の平面視内周形状を楕円状または長円状に設定することは、図１実施例のガスケット１０に対しても、同様に適用できる。
【図面の簡単な説明】
【図１】この発明の一実施例を示す図解図である。
【図２】図１実施例の斜視図（底面）である。
【図３】図１実施例の使用状態を示す図解図である。
【図４】図１実施例の使用状態を示す図解図である。
【図５】ガスケットが圧縮された状態を示す図解図である。
【図６】この発明の他の実施例を示す図解図である。
【図７】図６実施例の使用状態を示す図解図である。
【図８】従来技術を示す図解図である。
【図９】従来技術を示す図解図である。
【符号の説明】
１０，５２ …ガスケット
１２ …管
１４ …サドル付分水栓
４０ …本体
４２ …溝
４４ …リップ部
４６ …突部
５０ …開口[0001]
[Industrial application fields]
TECHNICAL FIELD The present invention relates to a saddle-equipped water faucet gasket, and more particularly to a saddle-equipped water faucet gasket that is attached to a saddle-equipped water faucet, for example, to stop the joint between a saddle-equipped water faucet and a pipe. .
[0002]
[Prior art]
8 includes a saddle 1a fixed to the outer surface of a pipe 2 with bolts and nuts 3 and a water stopper 1b screwed to the saddle 1a. As can be seen from FIG. 9, a saddle-equipped water faucet gasket (hereinafter simply referred to as “gasket”) 5 having a substantially rectangular cross section is attached to the lower part of the faucet mounting opening 4. Then, when the saddle-equipped water faucet 1 is attached to the outer surface of the pipe 2, the gasket 5 is pressed against the outer surface of the pipe 2 by the fastening force of the bolts and nuts 3, whereby the saddle-equipped water faucet 1 and the pipe 2 The joint of is stopped.
[0003]
[Problems to be solved by the invention]
The conventional gasket 5 (FIGS. 8 and 9) was developed on the assumption that it is applied to a relatively hard pipe 2 such as a cast iron pipe or a polyvinyl chloride (PVC) pipe. In order to strongly press the tube 2 against the outer surface of the tube 2, the compression margin of the gasket 5 is increased to increase the surface pressure. Therefore, when this is applied to a soft pipe 2 such as a polyethylene (PE) pipe, for example, the pipe 2 is pulled by the restoring force of the gasket 5 as indicated by a virtual line (two-dot chain line) in FIG. There was a risk that the water stop function would be impaired, especially under low water pressure.
[0004]
As one means for solving this problem, it is conceivable to use an O-ring instead of the gasket 5. According to the O-ring, the compression allowance can be reduced and the surface pressure can be lowered. Therefore, even if the tube 2 is a soft tube (polyethylene tube or the like), deformation thereof can be prevented. However, it has been difficult to maintain the water stoppage when the water pressure increases with the O-ring. For example, when the pipe 2 is bent due to ground fluctuation, the O-ring does not follow the curve, and thus the water stoppage cannot be maintained.
[0005]
Therefore, a main object of the present invention is to provide a gasket capable of reliably retaining water-stopping even when applied to a soft pipe.
[0006]
[Means for Solving the Problems]
The present invention relates to a saddle-equipped water faucet gasket that is attached to a saddle-equipped water faucet in order to stop a joint between the saddle-equipped water faucet and a pipe, and is provided around a branch hole formed in the pipe. An annular main body pressed against the outer surface of the tube, a groove formed on the inner peripheral surface of the main body, and a plurality of protrusions formed at intervals in the circumferential direction on at least one of the upper surface and the lower surface of the groove, The main body is a saddle-equipped water faucet gasket including a plate-like lip portion constituting the lower surface of the groove.
[0007]
[Action]
When the saddle-equipped water faucet is attached to the outer surface of the pipe, the lip of the gasket is pressed against the outer surface of the pipe and the groove is closed. Even in this case, since the protrusions formed on at least one of the upper surface and the lower surface of the groove function as spacers, a space is always ensured in the groove. Further, since the plurality of protrusions are formed at intervals, an opening communicating with the space in the groove is secured between the protrusions. Therefore, when water flows, water enters the deep part of the groove through this opening, and water pressure acts on the lower surface of the groove, that is, the upper surface of the lip portion.
[0008]
【The invention's effect】
According to this invention, since the lip portion can be brought into pressure contact with the outer surface of the pipe by applying water pressure to the upper surface of the lip portion, it is sufficient even if the compression margin of the lip portion is reduced and the surface pressure is lowered. Water stoppage can be obtained. Therefore, it is possible to prevent the pipe (soft pipe) from being deformed over time due to the restoring force of the gasket, and it is possible to reliably maintain the water stoppage. Further, since the lip portion can be pressed against the outer surface of the pipe by the plurality of protrusions, the water stoppage can be maintained even when the water pressure is low.
[0009]
If the lip part is inclined downward toward the opening end of the groove, the restoring width of the lip part can be increased, so that even if the pipe is bent due to ground fluctuation, for example, the lip part is bent to the pipe. Can be followed. Further, when at least the opening side edge of the upper surface of the groove is curved along the outer surface of the tube, the gasket can be stabilized on the outer surface of the tube. Furthermore, if the entire upper surface of the groove is curved along the outer surface of the tube, all of the protrusions can be evenly compressed between the lower surface and the upper surface of the groove.
[0010]
In addition, when the inner peripheral shape of the lip portion in plan view is set to be elliptical or oval with the axial direction of the tube as the major axis, the inner peripheral shape of the lip portion is made into a perfect circle with the outer surface of the tube pressed against the outer surface. Therefore, the tension can be applied uniformly to the lip portion 44. Therefore, the lift of the lip portion due to uneven tension can be suppressed.
The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.
[0011]
【Example】
A gasket 10 of this embodiment shown in FIGS. 1 and 2 is formed by joining a pipe 12 made of a soft material such as polyethylene, polybutene or polypropylene and a saddle-equipped water faucet 14 as shown in FIGS. In order to stop the water, the water faucet with saddle 14 is attached.
[0012]
Saddle-equipped water faucet 14 (FIGS. 3 and 4) includes a saddle portion 16 fixed to the outer surface of pipe 12 and a water faucet 18 to which a branch pipe (not shown) is joined. The saddle portion 16 includes an upper portion 16a and a lower portion 16b, and attachment portions 22 for attaching the bolts and nuts 20 are formed at both circumferential ends thereof. And the hole 24 is formed in the center part of the upper part 16a, and it comes up from the peripheral part of the hole 24, and the water faucet attachment port 26 is formed. Further, a gasket receiving portion 28 is formed on the lower inner peripheral surface of the water faucet mounting port 26, and a female screw 30 is formed on the upper inner peripheral surface. On the other hand, the water faucet 18 includes a main body 32 having an inverted L-shaped water passage formed therein, and a first connection port 34 is formed at a lower portion of the main body 32 (one end of the water passage). A second connection port 36 is formed on the other end of the water passage, and a male screw 38 is formed on the outer peripheral surface of the first connection port 34. Then, the gasket 10 is attached to the gasket receiving portion 28 of the saddle portion 16, and the female screw 30 of the saddle portion 16 and the male screw 38 of the water faucet 18 are screwed together.
[0013]
The gasket 10 (FIGS. 1 and 2) includes an annular main body 40 made of an elastic material such as rubber. The outer diameter of the main body 40 is set to be approximately the same size as the inner diameter of the gasket receiving portion 28, and the inner diameter of the main body 40 is set to be larger than the diameter of the branch hole 14 a formed in the pipe 12. Further, the height of the outer peripheral portion of the main body 40 is set to be slightly higher than the depth of the gasket receiving portion 28. A U-shaped groove 42 is formed on the inner peripheral surface of the main body 40, and a portion constituting the lower surface of the groove 42 in the main body 40 is a lip portion 44.
[0014]
The lip portion 44 is a portion that is pressed against the outer surface of the pipe 12 by a pressing force from a projection 46, which will be described later, and its own restoring force and water pressure. It is necessary to have both rigidity sufficient to obtain a force and ease of deformation along the outer surface of the tube 12. Therefore, the lip portion 44 is formed in a plate shape that is inclined downward toward the opening end side of the groove 42 and becomes thinner toward the opening end side. That is, a predetermined elastic deformation angle θ is ensured by inclining the lip portion 44, a predetermined rigidity is ensured by thickening the base portion of the lip portion 44, and deformation is easy by thinning the tip portion of the lip portion 44. Sex is secured. In FIG. 1B, the lip portion 44 is not inclined, but in this portion (IB-IB line cross-sectional portion), a predetermined elastic deformation angle θ is secured even when the lip portion 44 is horizontal. So there is no problem. That is, the inclination angle of the lip portion 44 is set relatively in relation to the tube wall of the tube 12.
[0015]
Moreover, the opening side edge of the upper surface of the groove 42 is curved along the outer surface of the tube 12, and a plurality of (eight in this embodiment) protrusions having a substantially semicircular cross section are formed on the upper surface of the groove 42. 46 are formed at intervals in the circumferential direction. However, the protrusion 46 may be formed on the lower surface of the groove 42, that is, the upper surface of the lip portion 44, or may be formed on both upper and lower surfaces of the groove 42.
[0016]
An annular protrusion 48 having a substantially semicircular cross section is formed on the inner peripheral edge of the upper surface of the main body 40. Therefore, when the water faucet 18 is joined to the saddle portion 16, the lower end surface of the water faucet 18 is pressed against the annular protrusion 48, thereby stopping the joint between the saddle portion 16 and the water faucet 18. .
When the saddle-equipped water faucet 14 (FIG. 3) to which the gasket 10 (FIGS. 1 and 2) is attached is fixed to the outer surface of the pipe 12 using the bolts and nuts 20, the gasket 10 is removed by the tightening force of the bolts and nuts 20. Compressed, the lower surface of the lip portion 44 is pressed against the outer surface of the tube 12, and the joint portion is stopped. In the compressed state of the gasket 10, the groove 42 is closed as shown in FIG. 5, but a plurality of protrusions 46 formed on the inner surface of the groove 42 function as spacers. α space is secured. Further, since the plurality of protrusions 46 are formed on the inner surface of the groove 42 at intervals, an opening 50 (FIG. 5) is secured between the protrusions 46. Therefore, when water passes through the pipe line including the pipe 12 and the saddle-equipped water faucet 14, water enters the deep part of the groove 42 through the opening 50, and water pressure acts on the upper surface of the lip part 44.
[0017]
According to this embodiment, by applying a hydraulic pressure to the upper surface of the lip portion 44, it is possible to supplement the force that presses the lip portion 44 against the outer surface of the tube 12, so that the compression margin of the gasket 10 is reduced and the surface pressure is reduced. Can be lowered. Accordingly, the deformation of the soft tube 12 over time due to the restoring force of the gasket 10 can be prevented, and the water stoppage can be maintained. Even when the water pressure is low, the lip portion 44 can be pressed against the outer surface of the tube 12 by the plurality of protrusions 46, and the thin tip portion of the lip portion 44 can be brought into close contact with the outer surface of the tube 12. As a result, the water stoppage can be maintained. Furthermore, even when the tube 12 is bent due to ground fluctuation or the like, the lip portion 44 is elastically deformed following the curve, so that the water stoppage can be maintained. Further, since at least the opening side edge of the upper surface of the groove 42 is curved along the outer surface of the tube 12, the gasket 10 can be stabilized on the outer surface of the tube 12.
[0018]
In the gasket 52 of another embodiment shown in FIG. 6, the upper surface of the groove 42 and the upper and lower surfaces of the lip portion 44 are curved along the outer surface of the tube 12. Further, the inner peripheral shape (FIG. 6A) in plan view of the lip portion 44 is set to an elliptical shape or an elliptical shape having a minor axis in the VIB-VIB line direction and a major axis in the VIC-VIC line direction. A plurality of protrusions 46 are formed on at least one of the upper and lower surfaces of the groove 42 at intervals in the circumferential direction.
[0019]
According to this embodiment, as shown in FIG. 7, the center of curvature of the upper surface of the groove 42 coincides with the center of curvature of the outer surface of the tube 12, so that the upper surface and the lower surface of the groove 42 (the upper surface of the lip portion 44) The plurality of protrusions 46 can be evenly compressed between them, and the restoring force F toward the center of the tube 14 can be obtained from all of the plurality of protrusions 46 with the same size. Therefore, the lip portion 44 can be pressed against the outer surface of the pipe 12 with a uniform force over the entire circumference, and the joint portion can be surely stopped without unevenness.
[0020]
Further, since the inner peripheral shape of the lip portion 44 is set to be oval or oval, the inner peripheral shape of the lip portion 44 is a perfect circle when the lip portion 44 is in pressure contact with the outer surface of the tube 14. That is, when the portion shown in FIG. 6B, that is, the short diameter portion is pressed against the outer surface of the tube 14, the lip portion 44 is inclined, so that the short diameter is enlarged. On the other hand, when the portion shown in FIG. 6C, that is, the long diameter portion is pressed against the outer surface of the tube 14, the lip portion 44 becomes horizontal, and thus the long diameter is reduced. As a result, the inner peripheral shape of the entire lip portion 44 becomes a perfect circle. Therefore, the tension can be applied uniformly to the lip portion 44, and the lift of the lip portion 44 due to the non-uniform tension can be suppressed.
[0021]
In order to suppress the lifting of the lip portion 44, setting the inner peripheral shape of the lip portion 44 in plan view to be elliptical or oval is similarly applied to the gasket 10 of FIG. 1 embodiment. it can.
[Brief description of the drawings]
FIG. 1 is an illustrative view showing one embodiment of the present invention;
FIG. 2 is a perspective view (bottom surface) of the embodiment in FIG. 1;
FIG. 3 is an illustrative view showing a use state of the embodiment in FIG. 1;
4 is an illustrative view showing a use state of the embodiment in FIG. 1; FIG.
FIG. 5 is an illustrative view showing a state in which a gasket is compressed.
FIG. 6 is an illustrative view showing another embodiment of the present invention.
FIG. 7 is an illustrative view showing a use state of the embodiment in FIG. 6;
FIG. 8 is an illustrative view showing a conventional technique.
FIG. 9 is an illustrative view showing a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10,52 ... Gasket 12 ... Pipe 14 ... Saddle with a saddle 40 ... Main body 42 ... Groove 44 ... Lip part 46 ... Projection part 50 ... Opening

Claims (5)

サドル付分水栓と管との接合部を止水するために前記サドル付分水栓に装着されるサドル付分水栓用ガスケットであって、
前記管に形成された分岐孔の周囲において前記管の外面に圧接される環状の本体、
前記本体の内周面に形成される溝、および
前記溝の上面および下面の少なくとも一方に周方向に間隔を隔てて形成される複数の突部を備え、
前記本体は前記溝の下面を構成する板状のリップ部を含む、サドル付分水栓用ガスケット。A saddle-equipped water faucet gasket attached to the saddle-equipped water faucet in order to stop the joint between the saddle-equipped water faucet and the pipe,
An annular main body pressed against the outer surface of the pipe around a branch hole formed in the pipe;
A groove formed on the inner peripheral surface of the main body, and a plurality of protrusions formed at intervals in the circumferential direction on at least one of the upper surface and the lower surface of the groove;
The saddle-equipped water faucet gasket, wherein the main body includes a plate-like lip portion constituting the lower surface of the groove. 前記リップ部は前記溝の開口端へ向かうに従って下方へ傾斜される、請求項１記載のサドル付分水栓用ガスケット。The saddle-equipped water faucet gasket according to claim 1, wherein the lip portion is inclined downward toward the opening end of the groove. 前記溝の上面の少なくとも開口側端縁は前記管の外面に沿うように湾曲される、請求項１または２記載のサドル付分水栓用ガスケット。The gasket for a water faucet with a saddle according to claim 1 or 2, wherein at least an opening side edge of the upper surface of the groove is curved along the outer surface of the pipe. 前記溝の上面全体が前記管の外面に沿うように湾曲される、請求項３記載のサドル付分水栓用ガスケット。The saddle-equipped water faucet gasket according to claim 3, wherein the entire upper surface of the groove is curved along the outer surface of the pipe. 前記リップ部の平面視内周形状が前記管の軸方向を長径とする楕円状または長円状に設定される、請求項１ないし４のいずれかに記載のサドル付分水栓用ガスケット。The water faucet gasket with a saddle according to any one of claims 1 to 4, wherein an inner peripheral shape of the lip portion in a plan view is set to an elliptical shape or an elliptical shape having a major axis in the axial direction of the pipe.
JP03464899A 1998-03-31 1999-02-12 Saddle faucet gasket Expired - Lifetime JP3694184B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP03464899A JP3694184B2 (en) 1998-03-31 1999-02-12 Saddle faucet gasket

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP8516498 1998-03-31
JP10-85164 1998-03-31
JP03464899A JP3694184B2 (en) 1998-03-31 1999-02-12 Saddle faucet gasket

Publications (2)

Publication Number Publication Date
JPH11344189A JPH11344189A (en) 1999-12-14
JP3694184B2 true JP3694184B2 (en) 2005-09-14

Family

ID=26373472

Family Applications (1)

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JP03464899A Expired - Lifetime JP3694184B2 (en) 1998-03-31 1999-02-12 Saddle faucet gasket

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4502158B2 (en) * 2000-05-18 2010-07-14 コスモ工機株式会社 Fitting for branch pipe connection
JP4492836B2 (en) * 2001-02-19 2010-06-30 コスモ工機株式会社 Fitting for branch pipe connection

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