JP3213755B2 - Mechanical coupling - Google Patents
Mechanical couplingInfo
- Publication number
- JP3213755B2 JP3213755B2 JP04977391A JP4977391A JP3213755B2 JP 3213755 B2 JP3213755 B2 JP 3213755B2 JP 04977391 A JP04977391 A JP 04977391A JP 4977391 A JP4977391 A JP 4977391A JP 3213755 B2 JP3213755 B2 JP 3213755B2
- Authority
- JP
- Japan
- Prior art keywords
- elastic packing
- joint
- housing
- tightening
- pressing
- 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 - Fee Related
Links
Landscapes
- Joints With Pressure Members (AREA)
- Joints With Sleeves (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ステンレス鋼のような
接合管を用いて一般の給水配管、温水配管や、特に空調
システムの冷温水配管を施工するような場合に使用され
るメカニカル継手に関するもので、詳しくは、そのシー
ル構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical joint used for connecting a general water supply pipe, a hot water pipe, and particularly a cold / hot water pipe of an air conditioning system using a joint pipe such as stainless steel. More specifically, the present invention relates to the sealing structure.
【０００２】[0002]
【従来の技術】図３は、従来一般のこの種のメカニカル
継手の構造を示すものであり、同図において、１は筒状
の継手本体で、ステンレス鋼管のような接合管２が挿入
される端部には、その外周面に雄ねじ部３が形成された
環状のハウジング部４が連設されているとともに、その
内周には、端部側ほど大径となるように軸線方向に傾斜
したパッキン押圧用の傾斜面５が形成されている。６は
上記ハウジング部４に対応して上記接合管２に外装され
て上記継手本体１との間をシールするための環状の弾性
パッキンである。７は上記接合管２に外嵌された押輪で
あり、その大径部７ａの内面には、上記雄ねじ部３に螺
合する雌ねじ部８が形成されている。９は上記接合管２
に外嵌されて上記両ねじ部３，８の螺合により押輪７を
締付け操作した際、上記弾性パッキン６をハウジング部
４の内側に圧入させて上記の傾斜面５に押し付ける環状
のリテーナ、１０は接合管２に外装された抜け止めリン
グであり、上記押輪７の締付け時に該押輪７における小
径部７ｂ側の内周面に形成の傾斜面１１によって接合管
２に予め施されている溝１２に押し込められるようにな
っている。2. Description of the Related Art FIG. 3 shows the structure of a conventional general mechanical joint of this type. In FIG. 3, reference numeral 1 denotes a cylindrical joint body into which a joining pipe 2 such as a stainless steel pipe is inserted. An annular housing portion 4 having an external thread formed on an outer peripheral surface thereof is continuously provided at an end portion, and an inner peripheral portion thereof is inclined in an axial direction so as to have a larger diameter toward the end portion. An inclined surface 5 for packing pressure is formed. Reference numeral 6 denotes an annular elastic packing which is provided on the joint pipe 2 corresponding to the housing portion 4 and seals the joint body 1 with the joint pipe 1. Reference numeral 7 denotes a pressing ring fitted to the outside of the joining pipe 2, and a female screw portion 8 screwed to the male screw portion 3 is formed on the inner surface of the large diameter portion 7 a. 9 is the joint pipe 2
When the pressing ring 7 is tightened by screwing the two screw portions 3 and 8 to the outside, the elastic packing 6 is pressed into the inside of the housing portion 4 to press the annular retainer 10 against the inclined surface 5. Reference numeral denotes a retaining ring provided on the joint pipe 2. A groove 12 formed in the joint pipe 2 in advance by an inclined surface 11 formed on the inner peripheral surface of the press ring 7 on the small diameter portion 7 b side when the press ring 7 is tightened. It can be pushed into.
【０００３】上記構成のものにおいて、押輪７側の雌ね
じ部８を継手本体１側の雄ねじ部３に螺合して締付け操
作すると、弾性パッキン６がリテーナ９によって軸方向
へ押し移動されて継手本体１のハウジング部４の内側へ
圧入される。このため、弾性パッキン６は傾斜面５に押
圧され、上記接合管２の外周面２Ａに密着するので、該
接合管２の外周面２Ａと継手本体１の内周面との間がシ
ールされる。In the above-mentioned construction, when the female thread 8 on the side of the press wheel 7 is screwed into the male thread 3 on the side of the joint body 1 and tightened, the elastic packing 6 is pushed and moved in the axial direction by the retainer 9 to thereby move the joint body. It is pressed into the inside of one housing part 4. For this reason, the elastic packing 6 is pressed against the inclined surface 5 and is brought into close contact with the outer peripheral surface 2A of the joint pipe 2, so that the space between the outer peripheral surface 2A of the joint pipe 2 and the inner peripheral surface of the joint body 1 is sealed. .
【０００４】また、上記押輪７の締付けによって抜け止
めリング１０が上記押輪７の小径部７ｂ側の傾斜面１１
により接合管２側の溝１２に押し込められ、接合管２の
引き抜けが阻止される。[0004] Further, the tightening of the pressing ring 7 causes the retaining ring 10 to be turned into an inclined surface 11 on the small diameter portion 7b side of the pressing ring 7.
As a result, it is pushed into the groove 12 on the side of the joining tube 2, and the withdrawal of the joining tube 2 is prevented.
【０００５】[0005]
【発明が解決しようとする課題】上記したような構成の
従来のメカニカル継手は、継手本体１のハウジング部４
の内面に形成した傾斜面５に弾性パッキン６を押し付け
る構成であるために、押輪７の締付トルクと弾性パッキ
ン６の面圧との関係が図４のように比例関係となり、押
輪７による締付量が増すにつれて操作がしにくくなり、
さらに押輪７の進み量が大きくなると、図５のように弾
性パッキン６の面圧が急激に大きくなり、一定の面圧を
保つ位置にセットしにくいという難点がある。The conventional mechanical joint having the above-described structure is composed of the housing 4 of the joint main body 1.
Since the elastic packing 6 is configured to press the elastic packing 6 against the inclined surface 5 formed on the inner surface of the inner ring, the relationship between the tightening torque of the pressing ring 7 and the surface pressure of the elastic packing 6 becomes proportional as shown in FIG. Operation becomes difficult as the weight increases,
Further, when the amount of advance of the pressing wheel 7 increases, the surface pressure of the elastic packing 6 rapidly increases as shown in FIG. 5, and there is a problem that it is difficult to set the elastic packing 6 at a position where a constant surface pressure is maintained.
【０００６】とくに、上記傾斜面５によって弾性パッキ
ン６を変形させるので、弾性パッキン６の拘束面（接触
面）６ａが自由面（比接触面）６ｂに比して大きくなる
ので、シール性が流体の温度変化の影響を受けやすい傾
向にある。すなわち、弾性パッキン６の線膨脹係数は
１．５×１０-4／℃と金属の線膨脹係数１．２〜１．８
×１０-5／℃に比べて大きいことから、上記拘束面６ａ
が大きいと、流体温度の高い状態で体積膨脹が自由面に
限定されることから、面圧が著しく上昇して弾性パッキ
ン６の劣化が進み易くなり、逆に流体温度が低くなる
と、面圧が著しく小さくなってシール性の低下を来すこ
とになる。たとえば常温組付け時での弾性パッキン６の
面圧が６０ｋｇｆ／ｃｍ2 の場合、流体温度が８５℃で
は面圧が１２０ｋｇｆ／ｃｍ2 と大きくなり、流体温度
が５℃では面圧が８ｋｇｆ／ｃｍ2 と著しく小さくな
る。したがって、水圧１０ｋｇｆ／ｃｍ2 下で使用する
場合、低温時に漏れが生じるおそれがある。In particular, since the elastic packing 6 is deformed by the inclined surface 5, the constraining surface (contact surface) 6a of the elastic packing 6 becomes larger than the free surface (specific contact surface) 6b, so that the sealing property is fluid. Tend to be susceptible to temperature changes. That is, the coefficient of linear expansion of the elastic packing 6 is 1.5 × 10 −4 / ° C., and the coefficient of linear expansion of metal is 1.2 to 1.8.
Since it is larger than × 10 −5 / ° C., the constraining surface 6a
When the fluid temperature is high, the volume expansion is limited to a free surface in a state where the fluid temperature is high. Therefore, the surface pressure is significantly increased and the deterioration of the elastic packing 6 is apt to progress. Conversely, when the fluid temperature is lowered, the surface pressure is reduced. It becomes extremely small, resulting in a decrease in sealing performance. For example, when the surface pressure of the elastic packing 6 at the time of assembly at room temperature is 60 kgf / cm 2 , the surface pressure becomes as large as 120 kgf / cm 2 at a fluid temperature of 85 ° C. and 8 kgf / cm 2 at a fluid temperature of 5 ° C. It is significantly smaller than 2 . Therefore, when used under a water pressure of 10 kgf / cm 2 , leakage may occur at low temperatures.
【０００７】本発明は上記のような問題点を解消するた
めになされたもので、押輪の締付け操作を容易にして一
定の面圧を確保でき、しかも流体の温度変化に関係な
く、適正なシール性を維持させることができるメカニカ
ル継手を提供することを目的としている。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can secure a constant surface pressure by facilitating a tightening operation of a pressing wheel. It is an object of the present invention to provide a mechanical joint capable of maintaining the performance.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するた
め、本発明に係るメカニカル継手は、接合管が挿入され
る端部にねじ部を有する環状ハウジング部が連設された
筒状の継手本体と、上記接合管に嵌合されて上記ねじ部
に螺合するねじ部が形成された押輪と、上記筒状継手本
体のハウジング部に対応して上記接合管に外装された環
状の弾性パッキンと、上記両ねじ部の螺合による押輪の
締付けにより上記弾性パッキンを上記ハウジング部の内
側へ圧入させる環状のリテーナとを備えたメカニカル継
手において、上記筒状継手本体のハウジング部の内周面
に上記接合管の外周面に平行な弾性パッキン用押圧面を
形成して、上記押輪の締付けにともない弾性パッキンを
径方向に圧縮させて互いに平行な面に押圧させるように
構成してあり、押輪の締付け 完了時に、リテーナが継手
本体の端面に当接して、上記ハウジング部の内側に、ハ
ウジングと接合管と弾性パッキンとにより囲まれて流体
の温度変化に伴う弾性パッキンの膨張および収縮を許容
する空間が形成されるようになっていると共に、その空
間の幅が、弾性パッキン用押圧面と接合管の外周面との
間隔と同じ寸法になっているものである。In order to achieve the above object, a mechanical joint according to the present invention has a tubular joint body having an annular housing portion having a threaded portion at an end into which a joining pipe is inserted. A press ring formed with a threaded portion fitted to the joint tube and screwed into the thread portion; and an annular elastic packing provided on the joint tube corresponding to a housing portion of the tubular joint body. An annular retainer that press-fits the elastic packing into the inside of the housing by tightening the press ring by screwing the two threaded portions together, wherein the inner peripheral surface of the housing of the tubular joint main body is provided with an annular retainer. forming a pressing surface for parallel elastic packing on the outer peripheral surface of the joint tube, Yes and configured to be pressed in a plane parallel to one another by compressing the elastic packing with the tightening of the junk ring radially junk ring At the time of tightening is complete, retainer fittings
Abutting against the end face of the main body,
Fluid surrounded by housing, joint tube and elastic packing
Expansion and contraction of elastic packing due to temperature change
Space is formed, and
The width between the gap between the elastic packing pressing surface and the outer peripheral surface of the joint pipe
It has the same dimensions as the interval .
【０００９】[0009]
【作用】本発明によれば、押輪の締付け時に継手本体の
ハウジング部の内側に圧入される弾性パッキンが継手本
体のハウジング部の内周面に形成された押圧面により押
圧されて、その径方向（厚さ方向）へ変形するのみであ
るから、一定の締付トルクで容易に締付け作業を行なえ
るうえ、押圧面と接合管の外周面との間隔で弾性パッキ
ンに対する圧縮率が決まり、一定の面圧が得られやすく
なり、さらに、弾性パッキンの自由面が大きくとれるの
で、流体の温度変化があっても、弾性パッキンの膨張お
よび収縮がハウジング部の内側に形成されている空間に
よって許容され、しかも、その空間の幅が、弾性パッキ
ン用押圧面と接合管の外周面との間隔と同じ寸法になっ
ているので、弾性パッキンの局部的な面圧変化を小さく
することができる。According to the present invention, when the pressing ring is tightened, the elastic packing press-fitted inside the housing portion of the joint main body is pressed by the pressing surface formed on the inner peripheral surface of the housing portion of the joint main body, and its radial direction is reduced. (Thickness direction), it can be easily tightened with a fixed tightening torque, and the compression ratio against the elastic packing is determined by the distance between the pressing surface and the outer peripheral surface of the joint pipe. Surface pressure can be easily obtained, and the free surface of the elastic packing can be increased .
And shrinkage in the space formed inside the housing part
Therefore, it is allowed and the width of the space is
Dimensions are the same as the distance between the pressing surface for
Therefore, a local change in the surface pressure of the elastic packing can be reduced.
【００１０】[0010]
【実施例】以下、本発明の一実施例を図面にもとづいて
説明する。An embodiment of the present invention will be described below with reference to the drawings.
【００１１】図１は本発明の一実施例によるメカニカル
継手を示す半截断面図であり、同図において、図３に示
す従来例と同一部所には、同一の符号を付して、それら
の説明を省略する。FIG. 1 is a half sectional view showing a mechanical joint according to an embodiment of the present invention. In FIG. 1, the same parts as those in the conventional example shown in FIG. Description is omitted.
【００１２】図１において、継手本体１の内周面には、
上記接合管２の外周面２Ａに平行な上記弾性パッキン用
の押圧面２１が形成されており、また、押輪７の締付け
完了時にリテーナ９が継手本体１の端面１ａと押輪７の
開口端面７Ｃに当接するように設定されている。２２は
上記継手本体１の開口端部内縁に形成された弾性パッキ
ン案内用のテーパ面であり、これに対応して弾性パッキ
ン６の一端外縁にもテーパ面２３（図２）が形成されて
いる。２４は上記抜け止めリング１０に対応して押輪７
の内周面に、接合管２の外周面２Ａに沿うように形成さ
れた平行面であり、図２に示すように、この平行面２４
の軸方向の長さＬは、押輪７の締付け時に抜け止めリン
グ１０が押輪７の傾斜面１１に押圧されないように締付
け長ｌよりも大に設定されている。In FIG. 1, on the inner peripheral surface of the joint body 1,
A pressing surface 21 for the elastic packing is formed in parallel with the outer peripheral surface 2A of the joining pipe 2, and a retainer 9 is provided on the end surface 1a of the joint body 1 and the opening end surface 7C of the pressing ring 7 when the tightening of the pressing ring 7 is completed. It is set to abut. Reference numeral 22 denotes a tapered surface for guiding the elastic packing formed on the inner edge of the opening end of the joint main body 1. A tapered surface 23 (FIG. 2) is also formed on the outer edge of one end of the elastic packing 6 correspondingly. . 24 is a pressing wheel 7 corresponding to the retaining ring 10.
Are formed on the inner peripheral surface of the joint pipe 2 along the outer peripheral surface 2A of the joint pipe 2, and as shown in FIG.
Is set larger than the tightening length l so that the retaining ring 10 is not pressed against the inclined surface 11 of the press wheel 7 when the press wheel 7 is tightened.
【００１３】つぎに、上記構成の動作について説明す
る。継手本体１の雄ねじ部３に押輪７の雌ねじ部８を螺
合して押輪７を締付け操作すると、リテーナ９により弾
性パッキン６が継手本体１側のハウジング部４内に圧入
される。この時、ハウジング部４の開口端部内縁のテー
パ面２２で弾性パッキン６の一端のテーパ面２３をガイ
ドするので、圧入はスムーズになされる。このテーパ面
２２の傾斜角度は３０°程度が好ましい。また、この実
施例では、上記押輪７の締付け完了と同時に、リテーナ
９が継手本体１の開口端面１ａに当るので、締付トルク
が急上昇し、押輪７の前進が阻止されるので、配管作業
者は容易に締付け完了を把握することができる。Next, the operation of the above configuration will be described. When the female thread 8 of the push ring 7 is screwed into the male thread 3 of the joint body 1 and the push ring 7 is tightened, the elastic packing 6 is pressed into the housing part 4 of the joint body 1 by the retainer 9. At this time, since the tapered surface 23 at one end of the elastic packing 6 is guided by the tapered surface 22 at the inner edge of the opening end of the housing portion 4, the press-fitting is performed smoothly. The inclination angle of the tapered surface 22 is preferably about 30 °. In this embodiment, since the retainer 9 hits the opening end face 1a of the joint body 1 simultaneously with the completion of the tightening of the press wheel 7, the tightening torque sharply increases, and the advance of the press wheel 7 is prevented. Can easily grasp the completion of tightening.
【００１４】上記弾性パッキン６がハウジング部４内に
圧入されると、この弾性パッキン６は継手本体１の内周
面に形成された押圧面２１により、径方向から押圧され
て弾性変形して接合管２の外周面２Ａに密着されること
になり、継手本体１の内周面と接合管２の外周面２Ａと
の間が液密にシールされることになる。このように弾性
パッキン６が径方向のみに弾性変形するだけであるか
ら、押輪７による締付け時には、一定のトルクで締付け
操作をやり易くなる。さらに、上記弾性パッキン６がハ
ウジング部４の内側に圧入される際の圧縮率は、図２に
示す弾性パッキン６の径方向の厚さ寸法Ｈと、押圧面２
１と接合管２の外周面２Ａとの間隔Ｗとで決まり、押輪
７の締付量に関係なく、一定の面圧を得ることができ
る。When the elastic packing 6 is press-fitted into the housing portion 4, the elastic packing 6 is pressed from the radial direction by a pressing surface 21 formed on the inner peripheral surface of the joint body 1, and is elastically deformed and joined. The inner peripheral surface of the joint body 1 and the outer peripheral surface 2A of the joint pipe 2 are sealed in a liquid-tight manner. Since the elastic packing 6 is elastically deformed only in the radial direction as described above, the tightening operation can be easily performed with a constant torque when tightening with the pressing wheel 7. Further, the compression ratio when the elastic packing 6 is pressed into the inside of the housing portion 4 is determined by the radial thickness H of the elastic packing 6 shown in FIG.
A constant surface pressure can be obtained irrespective of the tightening amount of the pressing wheel 7, which is determined by the distance W between the outer ring 1 and the outer peripheral surface 2 </ b> A of the joining pipe 2.
【００１５】とくに、上記押圧面２１は接合管２の外周
面２Ａに平行であるので、弾性パッキン６の自由面（非
接触面）６ｂが大きくなる。このため、流体の温度変化
にともなう弾性パッキン６の膨脹および収縮がハウジン
グ部４の内側の空間で許容され、シール面での面圧変化
が小さくなる。たとえば、常温組付時の面圧が２５ｋｇ
ｆ／ｃｍ2 の場合、流体温度８５℃では、面圧が３０ｋ
ｇｆ／ｃｍ2 となり、また流体温度が５℃では１５ｋｇ
ｆ／ｃｍ2 となり、低温時でもシール性が十分に確保さ
れることが判った。In particular, since the pressing surface 21 is parallel to the outer peripheral surface 2A of the joining pipe 2, the free surface (non-contact surface) 6b of the elastic packing 6 becomes large. For this reason, expansion and contraction of the elastic packing 6 due to the temperature change of the fluid are allowed in the space inside the housing portion 4, and the change in the surface pressure on the sealing surface is reduced. For example, the surface pressure when assembled at room temperature is 25 kg
f / cm 2 , at a fluid temperature of 85 ° C., the surface pressure is 30 k
gf / cm 2 , and 15 kg at a fluid temperature of 5 ° C.
f / cm 2 , which proved that the sealing property was sufficiently ensured even at a low temperature.
【００１６】ところで、上記押輪７の内面には、その軸
芯方向に沿って適当な長さの平行面２４が形成されてい
る。この平行面２４は、継手本体１の両側から差し込ま
れた接合管２の端部同志が突き当たってしまったような
場合において、抜け止めリング１０を傾斜面１１により
接合管２の外周面２Ａに喰い込まないようにして、接合
管２を軸芯方向に移動可能とするためのものであり、こ
の平行面２４の存在により継手本体１と接合管２との初
期の組付け設定を容易にすることができる。Incidentally, a parallel surface 24 having an appropriate length is formed on the inner surface of the pressing wheel 7 along the axial direction thereof. This parallel surface 24 bites the retaining ring 10 on the outer peripheral surface 2A of the joint pipe 2 by the inclined surface 11 when the ends of the joint pipe 2 inserted from both sides of the joint main body 1 abut against each other. The joint plane 2 is made to be movable in the axial direction so as not to be inserted, and the presence of the parallel surface 24 facilitates initial setting of the joint body 1 and the joint pipe 2. Can be.
【００１７】なお、上記弾性パッキン６の他端外縁に
も、図２のようにテーパ面２３と同様にテーパ面２５を
形成しておくと、弾性パッキン６の装着時の方向性が規
制されず、組付け作業性が一層改善される。If a tapered surface 25 is formed on the outer edge of the other end of the elastic packing 6 in the same manner as the tapered surface 23 as shown in FIG. Further, the assembling workability is further improved.
【００１８】[0018]
【発明の効果】以上のように、本発明によれば、継手本
体側のハウジング部の内周面に、接合管の外周面に平行
な弾性パッキン用の押圧面を形成したので、押輪の締付
け操作を一定の締付トルクで容易に行なうことができる
とともに、締付量に関係なく一定の面圧を得ることがで
き、締付け作業性の向上を図り得る。とくに弾性パッキ
ンの自由面が大となって、配管環境や流体の温度変化に
よるシール面の面圧変化が小さくなり、良好なシール性
を保持させることができる。As described above, according to the present invention, the pressing surface for elastic packing parallel to the outer peripheral surface of the joint pipe is formed on the inner peripheral surface of the housing portion on the joint body side, so that the pressing ring is tightened. The operation can be easily performed with a fixed tightening torque, and a constant surface pressure can be obtained irrespective of the tightening amount, so that tightening workability can be improved. In particular, the free surface of the elastic packing becomes large, so that the change in the surface pressure of the seal surface due to the change in the piping environment or the temperature of the fluid becomes small, and good sealing performance can be maintained.
【図１】本発明の一実施例によるメカニカル継手を示す
半截断面図である。FIG. 1 is a half sectional view showing a mechanical joint according to an embodiment of the present invention.
【図２】メカニカル継手の要部の寸法関係を示す図であ
る。FIG. 2 is a diagram showing a dimensional relationship of a main part of a mechanical joint.
【図３】従来のメカニカル継手を示す半截断面図であ
る。FIG. 3 is a half sectional view showing a conventional mechanical joint.
【図４】弾性パッキンの締付トルクと面圧との関係を示
す図である。FIG. 4 is a diagram showing a relationship between a tightening torque of an elastic packing and a surface pressure.
【図５】押輪の進み量と面圧との関係を示す図である。FIG. 5 is a diagram showing the relationship between the amount of advance of the pressing wheel and the surface pressure.
１ 継手本体 ２ 接合管 ３ 雄ねじ部 ４ ハウジング部 ６ 弾性パッキン ７ 押輪 ８ 雌ねじ部 ９ リテーナ ２１ 押圧面 DESCRIPTION OF SYMBOLS 1 Joint main body 2 Joint pipe 3 Male thread part 4 Housing part 6 Elastic packing 7 Pressing ring 8 Female thread part 9 Retainer 21 Pressing surface
フロントページの続き (72)発明者 森 健二 大阪府大阪市中央区平野町四丁目１番２ 号 大阪瓦斯株式会社内 (72)発明者 松原 為敏 大阪府大阪市中央区平野町四丁目１番２ 号 大阪瓦斯株式会社内 (72)発明者 井上 正親 大阪府岸和田市田治米町153番地の１ 日本鋼管継手株式会社内 (72)発明者 西潟 徹 大阪府岸和田市田治米町153番地の１ 日本鋼管継手株式会社内 (56)参考文献 特開 昭48−94012（ＪＰ，Ａ) 実開 昭52−108617（ＪＰ，Ｕ) 実開 昭61−123286（ＪＰ，Ｕ) 実公 平２−17265（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.7，ＤＢ名) F16L 19/00 - 19/08 F16L 21/00 - 21/08 Continued on the front page (72) Inventor Kenji Mori 4-1-2 Hirano-cho, Chuo-ku, Osaka-shi, Osaka Inside Osaka Gas Co., Ltd. (72) Inventor Takitoshi Matsubara 4-1-1, Hirano-cho, Chuo-ku, Osaka, Osaka No. 2 Inside Osaka Gas Co., Ltd. (72) Inventor Masachika Inoue 153-1, Tajimemachi, Kishiwada-shi, Osaka Nippon Steel Pipe Fitting Co., Ltd. (72) Inventor Tohru Nishigata 1 153, Tajimemachi, Kishiwada-shi, Osaka (56) References JP-A-48-94012 (JP, A) JP-A-52-108617 (JP, U) JP-A-61-123286 (JP, U) JP-A-2-17265 (JP, A) Y2) (58) Fields investigated (Int. Cl. 7 , DB name) F16L 19/00-19/08 F16L 21/00-21/08
Claims (1)
る環状ハウジング部が連設された筒状の継手本体と、上
記接合管に嵌合されて上記ねじ部に螺合するねじ部が形
成された押輪と、上記筒状継手本体のハウジング部に対
応して上記接合管に外装された環状の弾性パッキンと、
上記両ねじ部の螺合による押輪の締付けにより上記弾性
パッキンを上記ハウジング部の内側へ圧入させる環状の
リテーナとを備えたメカニカル継手において、上記筒状
継手本体のハウジング部の内周面に上記接合管の外周面
に平行な弾性パッキン用押圧面を形成して、上記押輪の
締付けにともない弾性パッキンを径方向に圧縮させて互
いに平行な面に押圧させるように構成してあり、押輪の
締付け完了時に、リテーナが継手本体の端面に当接し
て、上記ハウジング部の内側に、ハウジングと接合管と
弾性パッキンとにより囲まれて流体の温度変化に伴う弾
性パッキンの膨張および収縮を許容する空間が形成され
るようになっていると共に、その空間の幅が、弾性パッ
キン用押圧面と接合管の外周面との間隔と同じ寸法にな
っていることを特徴とするメカニカル継手。1. A tubular joint body having an annular housing portion having a threaded portion at an end into which a joining tube is inserted, and a threaded portion fitted to the joining tube and screwed to the threaded portion. Formed with a pressing ring, and an annular elastic packing that is provided on the joining pipe corresponding to the housing portion of the tubular joint body,
A mechanical joint having an annular retainer that press-fits the elastic packing into the inside of the housing by tightening the press ring by screwing the two threaded parts together, wherein the joining is performed on the inner peripheral surface of the housing of the tubular joint main body. A pressing surface for elastic packing is formed parallel to the outer peripheral surface of the tube, and the elastic packing is configured to be radially compressed and pressed against surfaces parallel to each other with the tightening of the pressing ring.
When tightening is completed, the retainer abuts against the end face of the joint body.
And a housing and a joining pipe inside the housing portion.
Elastic due to temperature change of fluid surrounded by elastic packing
A space is formed to allow expansion and contraction of the packing.
And the width of the space is
Be sure to have the same dimension as the distance between the kin pressing surface and the outer peripheral
Mechanical joints and said that you are me.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04977391A JP3213755B2 (en) | 1991-03-14 | 1991-03-14 | Mechanical coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04977391A JP3213755B2 (en) | 1991-03-14 | 1991-03-14 | Mechanical coupling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04285384A JPH04285384A (en) | 1992-10-09 |
| JP3213755B2 true JP3213755B2 (en) | 2001-10-02 |
Family
ID=12840492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04977391A Expired - Fee Related JP3213755B2 (en) | 1991-03-14 | 1991-03-14 | Mechanical coupling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3213755B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8056693B2 (en) | 2000-08-03 | 2011-11-15 | Christini Technologies, Inc. | Two-wheel drive two-wheeled vehicle |
-
1991
- 1991-03-14 JP JP04977391A patent/JP3213755B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8056693B2 (en) | 2000-08-03 | 2011-11-15 | Christini Technologies, Inc. | Two-wheel drive two-wheeled vehicle |
| US8689957B2 (en) | 2000-08-03 | 2014-04-08 | Christini Technologies, Inc. | Two-wheel drive two-wheeled vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04285384A (en) | 1992-10-09 |
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