JPS5921345Y2 - Packing type pipe fitting with biting ring - Google Patents
Packing type pipe fitting with biting ringInfo
- Publication number
- JPS5921345Y2 JPS5921345Y2 JP1976035256U JP3525676U JPS5921345Y2 JP S5921345 Y2 JPS5921345 Y2 JP S5921345Y2 JP 1976035256 U JP1976035256 U JP 1976035256U JP 3525676 U JP3525676 U JP 3525676U JP S5921345 Y2 JPS5921345 Y2 JP S5921345Y2
- Authority
- JP
- Japan
- Prior art keywords
- inclined surface
- cap nut
- pipe joint
- lock ring
- outer circumferential
- 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
Links
Landscapes
- Joints With Pressure Members (AREA)
Description
【考案の詳細な説明】
本考案は管継手に関し、更に詳述すれば合成樹脂で外周
を被覆したいわゆる樹脂被覆鋼管の接続に、も適用でき
るパツキン型管継手に関する。[Detailed Description of the Invention] The present invention relates to a pipe joint, and more specifically to a packing-type pipe joint that can be applied to the connection of so-called resin-coated steel pipes whose outer peripheries are coated with synthetic resin.
都市ガス、水道等の一般配管における鋼管の接続には管
用ねしによるねし接続が通常用いられているが、近年配
管作業の合理化および接続する管の強度保持のために管
端部にねし加工を施さずに管を接続するパツキン形管継
手が多く使用されるようになっている。Thread connections using pipe screws are normally used to connect steel pipes in general piping for city gas, water, etc., but in recent years, in order to streamline piping work and maintain the strength of the connected pipes, screws have been used at the ends of the pipes. Packet-type pipe fittings, which connect pipes without any processing, are increasingly being used.
特に配管寿命を延ばす必要から鋼管の外周面を合成樹脂
で被覆したいわゆる樹脂被覆鋼管の使用、が増加してき
ているが、この種の樹脂被覆鋼管を接続する場合管端部
に被覆層の除去を伴うねし加工を施すことは困難であり
、また鋼管の保護の面からも好ましいことではないので
、この点からもパツキン型管継手の必要性が高くなって
きている。In particular, the use of so-called resin-coated steel pipes, in which the outer peripheral surface of steel pipes is coated with synthetic resin, is increasing due to the need to extend the life of pipes.When connecting this type of resin-coated steel pipes, it is necessary to remove the coating layer from the pipe ends. It is difficult to apply the accompanying threading process, and it is also not preferable from the standpoint of protecting the steel pipe, so from this point of view as well, the need for packing-type pipe joints is increasing.
本考案は、従来の管継手を改良し、緊締効果、接続部の
可撓性、保守性に優れた管継手を提供することを目的と
する。The present invention aims to improve the conventional pipe joint and provide a pipe joint with excellent tightening effect, flexibility of the connection part, and maintainability.
以下に本考案の詳細を図示の実施例により説明する。The details of the invention will be explained below with reference to the illustrated embodiments.
本考案になるパツキン型管継手を合成樹脂被覆金属管の
接続に用いる場合を示す第１図において、管継手本体１
はその端部内周側に外広がりの傾斜面２を有し、その外
周側には雄ねじ部３を有する。In Fig. 1 showing the case where the packing-type pipe joint of the present invention is used for connecting synthetic resin-coated metal pipes, the pipe joint main body 1
has an outwardly expanding inclined surface 2 on the inner circumferential side of its end, and has a male threaded portion 3 on the outer circumferential side.
４は袋ナツトで、その内側内周には管継手本体１の雄ね
じ３に螺合する雌ねじ５が形成され、外周端部内周は外
すぼみの傾斜面６を形成する。Reference numeral 4 designates a cap nut, on its inner inner periphery, a female thread 5 is formed to be screwed into the male thread 3 of the pipe joint body 1, and on the inner periphery of the outer periphery end, an inclined surface 6 of a recess for removal is formed.
金属管８の表面には樹脂被覆層１８を形成することがで
き、金属管８と樹脂被覆層１８とで接続管Ｔを構成する
。A resin coating layer 18 can be formed on the surface of the metal tube 8, and the metal tube 8 and the resin coating layer 18 constitute a connecting tube T.
９は接続管Ｔの外周面である。接続管Ｔの外周面９と管
継手本体１の外広がりの傾斜面２とで形成される断面楔
状の空間内に環状の弾性パツキン７が挿入される。9 is the outer peripheral surface of the connecting tube T. An annular elastic packing 7 is inserted into a space having a wedge-shaped cross section formed by the outer circumferential surface 9 of the connecting pipe T and the outwardly expanding inclined surface 2 of the pipe joint body 1.
１０は弾性パツキン７の外側に位置し、弾性パツキン７
に外側から押圧する力を伝える座金である。10 is located outside the elastic packing 7;
This is a washer that transmits pressing force from the outside.
１１はロックリングで、第２図に示すように一部に切り
割り部１２を有し、その外周面は袋ナツト４の外すぼみ
傾斜面６に対応する外周傾斜面１３を有し、外側端部を
内周方向に突出させてフランジ部１４が形成しである。Reference numeral 11 denotes a lock ring, as shown in FIG. 2, it has a cut portion 12 in part, its outer circumferential surface has an outer circumferential inclined surface 13 corresponding to the recessed inclined surface 6 for removing the cap nut 4, and the outer end The flange portion 14 is formed by protruding in the inner circumferential direction.
ロックリング１１は装着状態においあフランジ部１４の
内周が接続管Ｔの外周面９に接触せず、接続管Ｔの外周
面９との間に間隙を存在させる。When the lock ring 11 is installed, the inner circumference of the flange portion 14 does not come into contact with the outer circumferential surface 9 of the connecting tube T, leaving a gap between the lock ring 11 and the outer circumferential surface 9 of the connecting tube T.
１５はコイル状スプリングよりなる食込環で、ロックリ
ング１１の内周面１６と接続管１Ｔの外周面９との間に
挿入されている。Reference numeral 15 denotes a biting ring made of a coiled spring, which is inserted between the inner circumferential surface 16 of the lock ring 11 and the outer circumferential surface 9 of the connecting tube 1T.
コイル状スプリングよりなる食込環１５としては、ピア
ノ線あるいはステンレス鋼線を使用し、耐食性を考慮し
た場合ステンレス鋼線を使用することが望ましい。Piano wire or stainless steel wire is used as the biting ring 15 made of a coiled spring, and it is preferable to use stainless steel wire in consideration of corrosion resistance.
また線径は、あまり細い場合にはコイルスプリングがそ
のコイルの径方向に撓み変形し易くなるために管抜は出
し阻止効果が弱くなるので好ましくなく、あまり太い径
の場合には必要以上に管に食込み、管の強さを損うと同
時に管接続部の可撓性を損うので好ましくない。In addition, if the wire diameter is too small, the coil spring will easily bend and deform in the radial direction of the coil, which will weaken the effect of preventing the tube from being pulled out, which is undesirable. It is undesirable because it digs into the tube, impairing the strength of the tube and at the same time impairing the flexibility of the tube connection.
結局、線径０．７〜２ｍｍφのものを使用する場合に好
結果が得られる。After all, good results can be obtained when using a wire with a diameter of 0.7 to 2 mmφ.
また、コイルスピッチについては、これがあまり密であ
ると、管外周面との接触点が密になるために食込み不足
となり管抜は出し阻止効果が弱くなるとともに、樹脂被
覆管に適用する場合には、樹脂被覆層を削りとりそれを
管軸方向に押し出す欠点を生じるので好ましくない。Regarding the coil pitch, if it is too dense, the points of contact with the outer circumferential surface of the tube will be dense, resulting in insufficient penetration and the effectiveness of preventing the tube from coming out will be weakened. This is not preferable since it has the disadvantage of scraping off the resin coating layer and pushing it out in the direction of the tube axis.
また、コイルピッチが過度に大なる場合には締付は時に
コイルが周方向に撓み変形し易くなるので充分な効果が
得られない。Further, if the coil pitch is excessively large, the tightening may sometimes cause the coil to be easily bent and deformed in the circumferential direction, so that a sufficient effect cannot be obtained.
コイルピッチを線径１．０〜１．７倍の範囲に選ぶ場合
に特に良好な結果が得られる。Particularly good results are obtained when the coil pitch is selected in the range of 1.0 to 1.7 times the wire diameter.
上記構成の本考案管継手において、袋ナツト４を管継手
本体１の雄ねじ３に螺合して締付けるにつれてロックリ
ング１１が内側方向に押圧されて移動しその内側端部１
７が座金１０に当接しこれを押圧して弾性パツキン７を
管継手本体１と接続管Ｔとの間の楔状空間に充填する。In the pipe joint of the present invention having the above structure, as the cap nut 4 is screwed onto the male thread 3 of the pipe joint body 1 and tightened, the lock ring 11 is pressed inward and moves, and the inner end 1
7 comes into contact with the washer 10 and presses it to fill the wedge-shaped space between the pipe joint body 1 and the connecting pipe T with the elastic packing 7.
袋ナツト４の螺合が進んで弾性パツキン７が充分に締め
付けられるとロックリング１１はもはや管軸方向へは移
動し難くなる。When the cap nut 4 is screwed on and the elastic packing 7 is sufficiently tightened, the lock ring 11 becomes difficult to move in the tube axis direction.
その後、さらに袋ナツト４を軸方向（左方向）へ移動さ
せようとすると、ロックリング１１の軸方向移動は阻止
されていても、ロックリング１１は切り割り部１２を有
しそれ自体外圧により押圧されてその径を減じ得るよう
になっているので、ロックリング１１は内径を減少する
ことによって袋ナツト４の軸方向移動を許す。After that, when an attempt is made to further move the cap nut 4 in the axial direction (to the left), even though the lock ring 11 is prevented from moving in the axial direction, the lock ring 11 has a cut portion 12 and is pressed by external pressure. The lock ring 11 allows the cap nut 4 to move in the axial direction by reducing its inner diameter.
コイル状スプリングを環状にしてなる食込環１５は、ロ
ックリング１１により接続管Ｔの外周面９に押圧されて
、断続的な多数点で接続管Ｔの外周面９に食込む。The biting ring 15 made of a coiled spring is pressed against the outer circumferential surface 9 of the connecting tube T by the lock ring 11, and bites into the outer circumferential surface 9 of the connecting tube T at multiple points intermittently.
袋ナツト４の螺合をさらに進めると、袋ナツト４はロッ
クリング１１の傾斜面１３上を摺動し、ロックリング１
１は一層径を縮小して食込管１５を半径方向に強圧し、
食込環１５は樹脂被覆層１８を貫通して金属管８に食込
み、大なる管抜は出し阻止効果を奏する。As the screwing of the cap nut 4 is further advanced, the cap nut 4 slides on the inclined surface 13 of the lock ring 11, and the lock ring 1
1 further reduces the diameter and strongly presses the biting pipe 15 in the radial direction,
The biting ring 15 penetrates the resin coating layer 18 and bites into the metal tube 8, and has a great effect of preventing the tube from coming out.
金属管８と食込環１５との間には摺動はほとんどなく、
袋ナツト４の螺合に伴う軸方向移動に際しては、摺動は
傾斜面６と傾斜面１３との間及び食込環１５と内周面１
６との間で受持つ。There is almost no sliding between the metal tube 8 and the biting ring 15,
When the cap nut 4 moves in the axial direction due to screwing, the sliding movement occurs between the inclined surface 6 and the inclined surface 13 and between the biting ring 15 and the inner circumferential surface 1.
Take charge between 6 and 6.
本考案の効果は次のとおりである。The effects of the present invention are as follows.
■ 弾性パツキン７が充分に締付けられた後、ロックリ
ング１１が径を縮小することによって袋ナツト４の外す
ぼみ傾斜面６がロックリング１１の外周傾斜面１３を摺
動することができるので、緊締効果が優れている。■ After the elastic packing 7 is sufficiently tightened, the diameter of the lock ring 11 is reduced so that the sloped surface 6 of the cap nut 4 that is removed can slide on the sloped outer surface 13 of the lock ring 11. The effect is excellent.
■ 袋ナツト４とロックリング１１との間は面接触であ
り、したがって袋ナツト４の充分な締付けが可能である
。(2) There is surface contact between the cap nut 4 and the lock ring 11, so that the cap nut 4 can be sufficiently tightened.
■ コイル状スプリングを環状にした食込環１５は接続
管Ｔに強圧されて金属管８の表面に食込むので大なる管
抜は出し阻止効果を奏する。(2) The biting ring 15, which is made of a coiled spring, is strongly pressed by the connecting tube T and bites into the surface of the metal tube 8, so that it has a great effect of preventing the tube from being pulled out.
■ 袋ナツト４は、通常、耐食性に優れた砲金等で作ら
れ、比較的高価であるが、食込環１５と直接摺動しない
ので傾斜面６が傷つけられることがなく、袋ナツト４の
寿命を長くすることができる。■ The cap nut 4 is usually made of gunmetal or the like with excellent corrosion resistance and is relatively expensive, but since it does not slide directly on the biting ring 15, the inclined surface 6 will not be damaged and the service life of the cap nut 4 will be extended. can be made longer.
■ ロックリング１１のフランジ部２４の内周が接続管
Ｔの外周面９から離れているので、食込環１５を支点と
して左右に撓むことが許され、したがって管の接続部に
おいて可撓性が確保される。■ Since the inner circumference of the flange portion 24 of the lock ring 11 is separated from the outer circumferential surface 9 of the connecting pipe T, it is allowed to bend from side to side using the biting ring 15 as a fulcrum, thus providing flexibility at the connecting portion of the pipe. is ensured.
■ ロックリング１１にフランジ部１４が形成されてい
るので、食込環１５が外部へ離脱するおそれがない。(2) Since the flange portion 14 is formed on the lock ring 11, there is no risk of the biting ring 15 coming off to the outside.
【図面の簡単な説明】
第１図は本考案管継手の実施例の断面図、第２図はロッ
クリングで゛ある。
１一管継手本体、３＝雄ねじ、４−袋ナツト、５−雌ね
じ、６−外すぼみ傾斜面、７−弾性パツキン、８＝金属
管、９＝外周面、１〇−座金、１１０ツクリング、１２
＝切り割り部、１３＝外周傾斜面、１４−フランジ部、
１５−食込環、１８−樹脂被覆層。[Brief Description of the Drawings] Fig. 1 is a sectional view of an embodiment of the pipe joint of the present invention, and Fig. 2 is a lock ring. 1-pipe joint body, 3=male thread, 4-cap nut, 5-female thread, 6-recessed inclined surface, 7-elastic packing, 8=metal tube, 9=outer surface, 10-washer, 110 ring, 12
= cut portion, 13 = outer peripheral inclined surface, 14 - flange portion,
15-biting ring, 18-resin coating layer.
Claims (1)
、管継手本体１の端部外周に形成された雄ねじ３に螺合
する雌ねじ５を一端に有し他端部内周に外すぼみの傾斜
面６を有する袋ナツト４と、管継手本体１の端部内周側
傾斜面２と接続管Ｔの外周面９とで形成される断面楔状
空間に充填される環状の弾性パツキン７と、環状弾性パ
ツキン７の外側に対接する座金１０と、袋ナツト４の外
すは゛みの傾斜面６と接続管Ｔの外周面９との間に挿入
されていて袋ナツト４を締めることにより接続管Ｔを緊
縮する緊締装置とを有するパツキン型管継手において、
該緊締装置は下記Ａ、 Ｂ及びＣの構成を具備するパツ
キン堅管管継手。 Ａ 袋ナツト４の外すぼみ傾斜面６に対応する外周傾斜
面１３を有し、且つ１個所に切り割り□部１２を有して
いて、外周傾斜面１３を袋ナツト４の外すぼみ傾斜面６
に対接させ、外側端部を内周方向に突出させてフランジ
部１４を形成し、フランジ部１４の内周と接続管Ｔの外
周面９との間に間隙を存在させたロックリング１１゜Ｂ
ロックリング１１と接続管Ｔの外周面９との間に挿入
され、ロックリング１１が緊縮されてその径を減少する
ことにより接続管Ｔの外周面９に押付けられるコイル状
スプリングを環状にした食込環１５゜ Ｃ１前記食込環１５は０．７〜２ｍｍφの範囲の径を有
する金属線から成ること。[Claims for Utility Model Registration] A pipe joint body 1 with an inclined surface 2 with an outer bottom on the circumferential side of the end, and a female thread 5 that is screwed into a male thread 3 formed on the outer periphery of the end of the pipe joint body 1. A wedge-shaped space in cross section formed by a cap nut 4 having a sloped surface 6 at one end and a recess on the inner periphery of the other end, an inclined surface 2 on the inner peripheral side of the end of the pipe joint body 1, and an outer peripheral surface 9 of the connecting pipe T. An annular elastic packing 7 is filled in the annular elastic packing 7, a washer 10 is placed in contact with the outside of the annular elastic packing 7, and a washer 10 is inserted between the inclined surface 6 of the cap nut 4 to be removed and the outer circumferential surface 9 of the connecting tube T. In a packing type pipe joint having a tightening device that tightens the connecting pipe T by tightening the cap nut 4,
The tightening device is a packing hard pipe joint having the following configurations A, B, and C. A: It has an outer peripheral inclined surface 13 corresponding to the recessed inclined surface 6 from which the cap nut 4 is removed, and has a cut □ section 12 at one place, and the outer peripheral inclined surface 13 corresponds to the recessed inclined surface 6 from which the cap nut 4 is removed.
A lock ring 11° having an outer end protruding toward the inner circumference to form a flange portion 14, and a gap existing between the inner circumference of the flange portion 14 and the outer circumferential surface 9 of the connecting pipe T. B
An annular coiled spring inserted between the lock ring 11 and the outer circumferential surface 9 of the connecting tube T, and pressed against the outer circumferential surface 9 of the connecting tube T when the lock ring 11 is compressed and its diameter is reduced. Engagement ring 15°C1 The engagement ring 15 is made of a metal wire having a diameter in the range of 0.7 to 2 mmφ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1976035256U JPS5921345Y2 (en) | 1976-03-25 | 1976-03-25 | Packing type pipe fitting with biting ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1976035256U JPS5921345Y2 (en) | 1976-03-25 | 1976-03-25 | Packing type pipe fitting with biting ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS52127313U JPS52127313U (en) | 1977-09-28 |
| JPS5921345Y2 true JPS5921345Y2 (en) | 1984-06-22 |
Family
ID=28494615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1976035256U Expired JPS5921345Y2 (en) | 1976-03-25 | 1976-03-25 | Packing type pipe fitting with biting ring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5921345Y2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS542422Y2 (en) * | 1973-06-11 | 1979-02-01 | ||
| JPS5028913U (en) * | 1973-07-06 | 1975-04-02 | ||
| JPS5416336Y2 (en) * | 1973-09-07 | 1979-06-27 |
-
1976
- 1976-03-25 JP JP1976035256U patent/JPS5921345Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52127313U (en) | 1977-09-28 |
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