JPH0547346Y2 - - Google Patents

Description

【考案の詳細な説明】 〔産業上の利用分野〕 この考案は、主として熱水や化学薬品等、パツ
キンの劣化を早める流体移送用パイプの接続に使
用される管継手の改良に関する。[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to improvements in pipe joints used to connect pipes for transferring fluids such as hot water and chemicals that accelerate the deterioration of packing.

〔従来の技術〕[Conventional technology]

従来一般の管継手は、第３図に示したように本
管イに接続された継手本体ロの一端にパツキン
ニ、座金ホ、チヤツクリングヘ及び袋ナツトトを
緩めた状態で取り付け、該各部材を貫通して上記
継手本体イに銅管等の接続管ハを嵌挿した後、上
記袋ナツトトを締め付けることにより、接続管ハ
表面にチヤツクリングヘを食い込ませて接続管の
抜け外れを防ぐと共に、上記パツキンニの内面を
接続管ハ表面に圧着して内部流体の漏洩を防止す
るようにしたものである。 As shown in Figure 3, in conventional pipe joints, the fitting, washer, chuck ring, and bag nut are attached to one end of the fitting body connected to the main pipe (A) in a loosened state, and each member is penetrated. After inserting a connecting pipe C such as a copper pipe into the joint body A, tightening the cap nut, the chuck ring digs into the surface of the connecting pipe to prevent the connecting pipe from coming off, and also prevents the inner surface of the fitting from coming off. is crimped onto the surface of the connecting tube to prevent leakage of internal fluid.

〔考案が解決しようとする課題〕[The problem that the idea attempts to solve]

しかし上述した構造の管継手は、これを熱水や
化学薬品等の流体移送用パイプの接続に使用した
場合、上記パツキンニが継手本体ロと接続管ハと
の隙間から浸入してくる流体に常時曝されて、そ
の劣化ないしは老化を早めるものであつた。 However, when a pipe joint with the above-mentioned structure is used to connect a pipe for transferring fluids such as hot water or chemicals, the above-mentioned pipe fitting is always exposed to the fluid that enters from the gap between the joint body B and the connecting pipe C. Exposure hastened its deterioration or aging.

更に従来の袋ナツトトは、その内周面のほぼ全
域に亘つて内ネジチが切設されていた関係上、該
袋ナツトトの締め付けによつて圧迫されるパツキ
ンニの変形量が上記内ネジチの凹部に塑入して接
続管ハの周面に対する面圧を低下させていた上、
上記パツキンニが袋ナツトトの内ネジチによつて
傷付けられたり、裂けたりしていた。 Furthermore, because the conventional bag nut has an internal thread cut out over almost the entire inner peripheral surface, the amount of deformation of the nut compressed by the tightening of the bag nut is caused by the amount of deformation in the concave part of the internal thread. In addition to reducing the surface pressure on the circumferential surface of the connecting pipe C by inserting it,
The above-mentioned jacket was damaged or torn by the inner screw of the bag nut.

この他、上記接続管ハの連結後に何らかの原因
によつて接続管だけが傾けられた場合、面接触に
よるシール機能を発揮するパツキンニは、これと
反対側の圧着力が低下する等、何れも流体の漏洩
傾向を呈するという課題が見られたものである。 In addition, if the connecting pipe is tilted for some reason after the connecting pipe C has been connected, the seal, which performs the sealing function by surface contact, may lose its crimp force on the opposite side. There was a problem with the leakage tendency.

〔課題を解決するための手段〕[Means to solve the problem]

そこで本考案は、上述した課題を解決するため
に、継手本体に嵌挿される接続管をパツキン、座
金、チヤツクリング及び袋ナツトによつて抜け止
め並びにシール可能に接続するようにした管継手
において、上記継手本体の接続管側開口部の内周
に段部を環設し、該段部にＯリング及び座金を嵌
着する一方、上記袋ナツトの内周中間部をパツキ
ンの外周面とほぼ同径の無ネジ面にするという手
段を用いた。 Therefore, in order to solve the above-mentioned problems, the present invention provides a pipe joint in which a connecting pipe that is inserted into a joint body is connected to the joint body using a packing, a washer, a chuck ring, and a cap nut in a manner that prevents the connecting pipe from coming off and allows sealing. A step is provided on the inner periphery of the opening on the connecting pipe side of the joint body, and an O-ring and washer are fitted to the step. We used a method of making the surface without threads.

〔作用〕 本考案管継手は、継手本体と接続管との間隙に
浸入し、パツキンと接触する流体をＯリングによ
つてシールすると共に、Ｏリングの線接触機能に
よつて接続管の傾きによるシール性の低下を防止
するという作用を奏する。[Function] The pipe fitting of the present invention uses the O-ring to seal fluid that enters the gap between the fitting body and the connecting pipe and comes into contact with the packing, and also uses the line contact function of the O-ring to prevent fluid from inclining the connecting pipe. It has the effect of preventing deterioration of sealing performance.

〔実施例〕〔Example〕

以下、本考案の構成を図面に示す実施例に基づ
いて更に具体的に述べると、１は両端の外周に外
ネジ１ａを切設した継手本体であつて、銅管等か
らなる設置管Ｐの挿着側の開口部内周に段部１
ｂ，１ｃを環設し、該段部に耐熱・耐薬品性に優
れた合成ゴム系Ｏリング２及び座金３を嵌着した
ものである。また４は上記継手本体１の端面及び
座金３と当接するパツキン、５は上記パツキン押
え用の座金、６は一側を傾斜面としたチヤツクリ
ング、更に７は袋ナツトであつて、第２図に示し
たように、その内周面を上記パツキン４の外周面
とほぼ同径とした上、開口端側の内周にのみ継手
本体１の外ネジ１ａと螺合する内ネジ７ａを切設
し、該内ネジと内奥面７ｃとの中間部を平滑な無
ネジ面７ｂとする一方、上記接続管Ｐ挿通用の透
孔端面をチヤツクリング６の傾斜面と添合可能に
傾斜させたものである。 Hereinafter, the structure of the present invention will be described in more detail based on the embodiment shown in the drawings. Reference numeral 1 denotes a joint body with external threads 1a cut on the outer periphery of both ends, and the installation pipe P made of copper pipe or the like. There is a step 1 on the inner circumference of the opening on the insertion side.
b and 1c are arranged in a ring, and a synthetic rubber O-ring 2 and a washer 3 having excellent heat resistance and chemical resistance are fitted into the stepped portions. Further, 4 is a packing that comes into contact with the end face of the joint body 1 and the washer 3, 5 is a washer for holding down the packing, 6 is a chuck ring having an inclined surface on one side, and 7 is a cap nut. As shown, its inner circumferential surface is made approximately the same diameter as the outer circumferential surface of the packing 4, and an inner thread 7a is cut only on the inner circumference of the opening end to engage with the outer thread 1a of the joint body 1. , while the intermediate part between the inner thread and the inner deep surface 7c is a smooth unthreaded surface 7b, the end surface of the through hole for insertion of the connecting pipe P is inclined so as to be compatible with the inclined surface of the chuck ring 6. be.

而して本案管継手は、先ず継手本体１の一端側
を本管P′に接続し、他端側の内周段部１ｂ，１ｃ
にＯリング２及び座金３を嵌着した後、継手本体
１の先端とその外ネジ１ａに緩く螺合された袋ナ
ツト７との間にパツキン４、座金５、チヤツクリ
ング６を装着しておく。しかる後、接続管Ｐを継
手本体１に挿入し、袋ナツト７を締め付ければ、
上記パツキン４はチヤツクリング６に押されて袋
ナツト７の無ネジ面７ｂに沿つて摺接・前進し、
該チヤツクリングと継手本体１及び座金３との間
で押圧される。 Therefore, in the proposed pipe joint, first, one end side of the joint body 1 is connected to the main pipe P', and the inner circumferential stepped portions 1b, 1c on the other end side are
After fitting the O-ring 2 and washer 3 to the joint body 1, a packing 4, a washer 5, and a chuck ring 6 are installed between the tip of the joint body 1 and a cap nut 7 loosely screwed onto the external thread 1a. After that, insert the connecting pipe P into the joint body 1 and tighten the cap nut 7.
The packing 4 is pushed by the chuck ring 6 and slides into contact with and moves forward along the non-threaded surface 7b of the cap nut 7,
The chuck ring is pressed between the joint body 1 and the washer 3.

この時、チヤツクリング６が接続管Ｐの表面に
食い込んでその抜け外れを防止することは従来と
同様であるが、上記パツキン４の外周面は平滑な
無ネジ面７ｂに押止されているため、パツキン内
周面が縮径しようとして接続管Ｐの表面に強く圧
着され、該部を確実にシールすると同時に、継手
本体の段部１ｂに内嵌されたＯリング２も亦、そ
の段面と座金３によつて三方が当接しているた
め、接続管Ｐの表面と強く線接触して該部を効果
的にシールするのである。 At this time, the chuck ring 6 bites into the surface of the connecting pipe P to prevent it from coming off, as in the conventional case, but since the outer peripheral surface of the packing 4 is pressed against the smooth non-threaded surface 7b, The inner circumferential surface of the packing is strongly pressed against the surface of the connecting pipe P in an attempt to reduce its diameter, and at the same time, the O-ring 2 fitted inside the stepped portion 1b of the joint body is also pressed against the stepped surface and the washer. 3, the three sides are in contact with each other, so that there is strong line contact with the surface of the connecting pipe P, effectively sealing that part.

〔考案の効果〕[Effect of idea]

以上述べたように本考案の管継手は、継手本体
と接続管を本体の段部に内嵌したＯリングと、締
め込み式のパツキンとで二重にシールするように
したものであるから、特に熱水や化学薬品等の流
体移送パイプの接続に使用した場合であつても、
該接続管と継手本体との間隙から浸入する流体が
耐熱・耐薬品性に優れる上記Ｏリングによつてパ
ツキンの手前で遮断され、該パツキンが上記流体
に直接曝されることがなく、その劣化ないしは老
化の進行を防止することができる。従つて長期に
亘つて高いシール効果を維持できるのである。 As mentioned above, the pipe joint of the present invention double-seals the joint body and the connecting pipe with an O-ring fitted into the stepped part of the main body and a tightening type packing. Especially when used to connect fluid transfer pipes such as hot water or chemicals.
Fluid entering from the gap between the connecting pipe and the fitting body is blocked before the packing by the O-ring, which has excellent heat and chemical resistance, and the packing is not directly exposed to the fluid, preventing its deterioration. Or the progress of aging can be prevented. Therefore, a high sealing effect can be maintained for a long period of time.

また何らかの原因で上記接続管に傾きが生じ、
一部パツキンとの圧接力が低下しても、接続管と
線接触するＯリングによつて流体の漏洩を確実に
防止できるのである。 Also, due to some reason, the above connecting pipe may become tilted.
Even if the contact force with the packing partially decreases, the O-ring that is in line contact with the connecting pipe can reliably prevent fluid leakage.

この他、本案管継手は袋ナツトの中間部をパツ
キンの外周面と摺接可能な無ネジ面としたもので
あるから、上記パツキンの内周面が強力に接続管
の表面に圧着されてシール機能が一層向上する
上、従来品のようにパツキンが袋ナツトの内ネジ
で傷付けられたり、裂けたりすることもない等、
優れた効果を発揮するものである。 In addition, in the proposed pipe joint, the middle part of the cap nut is a non-threaded surface that can slide into contact with the outer circumferential surface of the packing, so the inner circumferential surface of the packing is strongly crimped to the surface of the connecting pipe, creating a seal. In addition to further improving functionality, the packing is not damaged or torn by the internal threads of the cap nut, unlike conventional products.
It exhibits excellent effects.

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

第１図は本案管継手の一部を切欠して示す側面
図、第２図はその要部の拡大断面図、第３図は管
継手の従来例を示す一部切欠側面図である。 尚、図中１……継手本体、１ｂ，１ｃ……段
部、２……Ｏリング、３……座金、４……パツキ
ン、５……座金、６……チヤツクリング、７……
袋ナツト、７ａ……内ネジ、７ｂ……無ネジ面。 FIG. 1 is a partially cut-away side view of the proposed pipe joint, FIG. 2 is an enlarged sectional view of the main part thereof, and FIG. 3 is a partially cut-away side view of a conventional pipe joint. In the figure, 1... joint body, 1b, 1c... stepped portion, 2... O-ring, 3... washer, 4... packing, 5... washer, 6... chuck ring, 7...
Cap nut, 7a...Inner thread, 7b...Unthreaded surface.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 継手本体に嵌挿される接続管をパツキン、座
金、チヤツクリング及び袋ナツトによつて抜け止
め並びにシール可能に接続するようにした管継手
において、上記継手本体１の接続管側開口部の内
周に段部１ｂ，１ｃを環設し、該段部にＯリング
２及び座金３を嵌着する一方、上記袋ナツト７の
内周中間部をパツキン４の外周面とほぼ同径の無
ネジ面７ｂとしたことを特徴とする管継手。 In a pipe joint in which a connecting pipe to be inserted into the joint body is connected to the joint body using a packing, a washer, a chuck ring, and a cap nut in a manner that prevents it from coming off and allows a seal, a step is formed on the inner periphery of the opening on the side of the connecting pipe of the joint body 1. The O-ring 2 and the washer 3 are fitted into the step portions 1b and 1c, and the middle portion of the inner periphery of the cap nut 7 is formed with a non-threaded surface 7b having approximately the same diameter as the outer periphery of the packing 4. A pipe joint characterized by: