JPS6323676Y2 - - Google Patents

Description

【考案の詳細な説明】 本考案は管接続具のガス漏出防止構造に関する
ものである。[Detailed Description of the Invention] The present invention relates to a structure for preventing gas leakage of a pipe connector.

従来の管接続具（ソケツト）にあつては、第１
図に示すように、プラグB′の弁体４′を押すため
の押棒５′を流出側筒部１a′と流入側筒部１b′と
の境から流入側筒部１b′の開口端面近くまで突出
し、押棒５′の基部近傍に複数個のガス流入用開
口６′を設け、流入側筒部１b′の内周にゴム製の
ベロー状パツキン７′を嵌込み、ベロー状パツキ
ン７′外周のコイルばね１０′でベロー状パツキン
７′の伸長を付勢するとともにベロー状パツキン
７′が押し縮められたときにその胴部７a′の一部
が内方へ陥没してガスの流通を妨げないようにベ
ロー状パツキン７′の内周に入れたばねa′により
保形している。したがつて保形用のばねa′は必ず
必要であつた。またベロー状パツキン７′は少く
とも通常用いられているゴムホースの寿命よりも
長寿のものが用いられているが、強化ゴムホース
（例えば、布やガラス繊維等を巻いたもの）等の
耐久性のある特殊なゴムホースに使用する場合に
より一層の性能が要求される。すなわちベロー状
パツキン７′の伸縮に伴ない比較的薄肉の胴部７
a′が繰返し変形を受けているうちに劣化あるいは
老化し、孔があいたり、亀裂が生じたりすると、
第２図の矢印のような経路を経てソケツトA′か
ら外部へガスが漏出するおそれがあり、安全性の
面で不安が生じるのである。 For conventional pipe fittings (sockets), the first
As shown in the figure, move the push rod 5' for pushing the valve body 4' of the plug B' from the boundary between the outflow side cylindrical part 1a' and the inflow side cylindrical part 1b' to near the opening end surface of the inflow side cylindrical part 1b'. A plurality of gas inflow openings 6' are provided near the base of the protruding push rod 5', and a rubber bellows-shaped packing 7' is fitted into the inner periphery of the inflow-side cylindrical portion 1b'. The coil spring 10' urges the extension of the bellows-like packing 7', and when the bellows-like packing 7' is compressed, a part of the body 7a' does not collapse inward to obstruct gas flow. The shape is maintained by the spring a' inserted into the inner periphery of the bellows-like packing 7'. Therefore, a shape-retaining spring a' was always necessary. In addition, the bellows-like packing 7' is made of a material with a longer lifespan than that of a commonly used rubber hose. Even higher performance is required when used in special rubber hoses. In other words, as the bellows-like packing 7' expands and contracts, the body 7 becomes relatively thin.
If a′ deteriorates or ages while undergoing repeated deformation, and holes or cracks form,
There is a risk of gas leaking from socket A' to the outside through the path shown by the arrow in FIG. 2, raising concerns about safety.

本考案は叙上の従来例の欠点に鑑みてなされた
ものであり、その目的とするところは万一ベロー
状パツキンが劣化あるいは老化して孔あきや亀裂
が生じてもソケツトから外部へガスが漏出するこ
とがなくて安全性に優れ、またベロー状パツキン
保形用のばねも必要としない管接続具を提供する
にある。 The present invention was developed in view of the drawbacks of the conventional examples mentioned above, and its purpose is to prevent gas from leaking from the socket to the outside even if the bellows-like packing deteriorates or ages and develops holes or cracks. To provide a pipe connector which does not leak, has excellent safety, and does not require a spring for maintaining the shape of a bellows-like packing.

以下本考案を実施例により詳述する。ソケツト
Ａは、第３図に示すようにソケツト本体１、保持
筒３、ベロー状パツキン７、操作環１１等より構
成されている。ソケツト本体１は硬質合成樹脂材
等により成形されていて流出側筒部１ａと流入側
筒部１ｂより成り、流入側筒部１ｂ外周面の後部
（流出側筒部寄り）にはばね受止め部１２を突設
してあり、流入側筒部１ｂの前部（流入側筒部の
開口側）において流入側筒部１ｂの側壁に複数箇
所の透孔１３を穿設してあり、流入側筒部１ｂの
前端外周面に突縁１４を周設してある。透孔１３
の流入側筒部１ｂの外周側の開口径は透孔１３へ
嵌められる鋼球９の直径よりも大きく、内周側の
開口径は鋼球９の直径よりも小さくしてある。保
持筒３は略円筒状をしており、保持筒３の基端に
は固定用鍔部１５を設けてあり、この保持筒３は
延出基部側を大径とするとともに、保持筒３の先
端部をやや小径に絞つて小径部３ａとしてあり、
小径部３ａの先端にガス流入用開口６を複数個開
口するとともに中央から押棒５を突出させてあ
る。この保持筒３は流入側筒部１ｂ内に同心状と
なるように嵌入されて固定用鍔部１５を流入側筒
部１ｂ内壁に嵌合させて固定されており、保持筒
３外周面と流入側筒部１ｂ内周面との間に間隙１
７を設け、押棒５を流入側筒部１ｂの開口端面近
くに突出させられている。もちろんソケツト本体
１と保持筒３とを一体に成形しても良い。操作環
１１は難燃性の合成樹脂材や金属材により成形さ
れており、操作環１１の内周には段部１８を形成
して段部１８の前部内周面１１ｂを後部内周面１
１ａよりも内径が大きくなるようにし、後部内周
面１１ａは流入側筒部１ｂの外周面に略ぴつたり
接触させてある。しかして流入側筒部１ｂの外周
面にばね１９を外挿し、透孔１３内に流入側筒部
１ｂ側壁の肉厚よりも直径の大きな鋼球９を遊嵌
している。操作環１１は流入側筒部１ｂの外周に
嵌挿させてあり、操作環１１は段部１８を突縁１
４に当接して係止されている。ばね１９はばね受
止め部１２と操作環１１の後部との間で、スライ
ド自在な操作環１１を前方へ突出付勢し、流入側
筒部１ｂ外周に嵌挿している。ベロー状パツキン
７は比較的薄肉の胴部７ａの両端に夫々フランジ
２０ａ，２０ｂを設け、先端側のフランジ２０ｂ
の外周には金属環２１を嵌着してあり、先端には
弾性を有する帯状リング部２３を突設し、内周面
先端部には２条の弾性を有する弾性突起８を周設
して弾性突起８間に環状溝１６を形成してある。
ベロー状パツキン７は金属環２１を除いてNBR
のような弾性材により一体に成形されるものであ
る。ベロー状パツキン７は胴部７ａの変形により
伸縮するものであり、胴部７ａの外周にコイルば
ね１０を介挿してベロー状パツキン７の伸長を強
制してある。このベロー状パツキン７は間隙１７
に嵌入され、その基端側は間隙１７の底部に座金
２２によつて固着され、先端側は自由となつてい
る。ベロー状パツキン７が伸長しているときに
は、ベロー状パツキン７の弾性突起８は保持筒３
の小径部３ａ外周に軽く接していて内部にちりや
ほこりが侵入しないようにしているが、弾性突起
８には力が加わらず弾性変形していないものであ
る。また環状溝１６内には真空グリスを充填して
ある。このソケツトＡが接続させられていない状
態では、第３図に示すように、ベロー状パツキン
７が伸びていて、その一端のフランジ２０ｂ外面
が鋼球９を押上げて鋼球９の上面を流入側筒部１
ｂの外周面より突出せしめており、操作環１１は
ばね１９に抗して押し込まれた位置でその内周の
段部１８が上記の突出している鋼球９の上面に当
接して係止される。 The present invention will be explained in detail below with reference to Examples. As shown in FIG. 3, the socket A is composed of a socket body 1, a holding cylinder 3, a bellows-shaped packing 7, an operating ring 11, and the like. The socket body 1 is molded from a hard synthetic resin material, etc., and consists of an outflow side cylindrical part 1a and an inflow side cylindrical part 1b, and a spring receiving part is provided at the rear of the outer peripheral surface of the inflow side cylindrical part 1b (closer to the outflow side cylindrical part). 12 are provided protrudingly, and a plurality of through holes 13 are bored in the side wall of the inflow side cylinder part 1b at the front part of the inflow side cylinder part 1b (opening side of the inflow side cylinder part). A projecting edge 14 is provided around the outer peripheral surface of the front end of the portion 1b. Through hole 13
The opening diameter on the outer circumferential side of the inflow side cylinder portion 1b is larger than the diameter of the steel ball 9 fitted into the through hole 13, and the opening diameter on the inner circumferential side is smaller than the diameter of the steel ball 9. The holding cylinder 3 has a substantially cylindrical shape, and a fixing collar 15 is provided at the base end of the holding cylinder 3.The holding cylinder 3 has a large diameter on the extending base side, and the holding cylinder 3 has a large diameter on the extending base side. The tip part is narrowed down to a slightly smaller diameter to form a small diameter part 3a,
A plurality of gas inflow openings 6 are opened at the tip of the small diameter portion 3a, and a push rod 5 is made to protrude from the center. This holding cylinder 3 is fitted concentrically into the inlet side cylinder part 1b, and is fixed by fitting the fixing collar part 15 to the inner wall of the inlet side cylinder part 1b, so that the outer peripheral surface of the holding cylinder 3 and the inflow side cylinder part 1b are fixed. There is a gap 1 between the inner circumferential surface of the side cylinder part 1b.
7 is provided, and the push rod 5 is made to protrude near the open end surface of the inflow side cylinder portion 1b. Of course, the socket body 1 and the holding tube 3 may be integrally molded. The operating ring 11 is molded from a flame-retardant synthetic resin material or a metal material, and a stepped portion 18 is formed on the inner periphery of the operating ring 11 so that the front inner circumferential surface 11b of the stepped portion 18 is connected to the rear inner circumferential surface 1.
1a, and the rear inner peripheral surface 11a is brought into substantially tight contact with the outer peripheral surface of the inflow side cylindrical portion 1b. A spring 19 is fitted onto the outer circumferential surface of the inflow side cylindrical portion 1b, and a steel ball 9 having a diameter larger than the wall thickness of the inflow side cylindrical portion 1b is loosely fitted into the through hole 13. The operating ring 11 is fitted onto the outer periphery of the inflow side cylindrical portion 1b, and the operating ring 11 connects the stepped portion 18 to the projecting edge 1.
4 and is locked. The spring 19 urges the slidable operating ring 11 to protrude forward between the spring receiving part 12 and the rear part of the operating ring 11, and is fitted into the outer periphery of the inflow side cylinder part 1b. The bellows-like packing 7 has flanges 20a and 20b at both ends of a relatively thin body 7a, and a flange 20b on the tip side.
A metal ring 21 is fitted on the outer periphery of the metal ring 21, an elastic band-shaped ring portion 23 is protruding from the tip, and two elastic protrusions 8 are provided around the tip of the inner circumferential surface. An annular groove 16 is formed between the elastic projections 8.
The bellows-like packing 7 is NBR except for the metal ring 21.
It is integrally molded from an elastic material such as. The bellows-like packing 7 expands and contracts as the body 7a deforms, and a coil spring 10 is inserted around the outer periphery of the body 7a to force the bellows-like packing 7 to expand. This bellows-like packing 7 has a gap 17
The proximal end is fixed to the bottom of the gap 17 by a washer 22, and the distal end is free. When the bellows-like packing 7 is extended, the elastic protrusion 8 of the bellows-like packing 7
Although the elastic protrusion 8 is in light contact with the outer periphery of the small diameter portion 3a to prevent dust from entering inside, no force is applied to the elastic protrusion 8 and it is not elastically deformed. Further, the annular groove 16 is filled with vacuum grease. When this socket A is not connected, as shown in FIG. Side tube part 1
When the operating ring 11 is pushed in against the spring 19, the step 18 on its inner circumference abuts against the upper surface of the protruding steel ball 9 and is locked. Ru.

この状態において、第６図に示すように、プラ
グＢをソケツト本体１内に挿入するとプラグＢ先
端の球帯面２４がベロー状パツキン７の帯状リン
グ部２３に圧接しながら押してコイルばね１０の
弾性力に抗してベロー状パツキン７を押し縮めつ
つプラグＢにソケツト本体１内を圧入すると押棒
５により弁体４が後退せしめられて弁体４が開成
し、バイパス溝２５を通つてプラグＢから流出し
たガスはガス流入用開口６から保持筒３へ移流
し、更に流出側筒部１ａ内を経てホースへと流出
してゆくものである。更にベロー状パツキン７を
圧縮してソケツト本体１内をプラグＢに挿入する
とプラグＢの頭部２外周面に周設したＶ字状溝部
２６がソケツト本体１の透孔１３の直下に来る。
この時鋼球９は下面に当接していたベロー状パツ
キン７のフランジ２０ｂ外周の金属環２１がなく
なつており、他方鋼球９の上面は操作環１１の段
部１８に押されるからプラグＢのＶ字状溝部２６
に落ち込む。鋼球９がプラグＢのＶ字状溝部２６
に落ち込むと、鋼球９の上面で係止せられていた
操作環１１は自由になり、ばね１９に押されて右
方に移動し、操作環１１の後部内周面１１ａが鋼
球９の上に来て、鋼球９が流入側筒部１ｂの外周
面に突出するのを妨げるから、プラグＢはＶ字状
溝部２６において鋼球９に係止せられ、ソケツト
ＡとプラグＢとは自然に抜けないようになる。こ
こでベロー状パツキン７が圧縮せられて変形して
も胴部７ａが保持筒３の外周に圧接させるだけで
ガスの流れを妨げることがないようにしてある。
ソケツトＡとプラグＢとの接続状態においては、
押し縮められたコイルばね１０の弾発力により帯
状リング部２３はプラグＢの球帯面２４に圧接さ
せられていてベロー状パツキン７の先端とプラグ
Ｂの先端との間の気密を保持されており、またベ
ロー状パツキン７のフランジ２０ａは座金２２に
より間隙１７の底部に圧接されていてベロー状パ
ツキン７の基端の気密を保つていてベロー状パツ
キン７の外へガスが漏出しないようにしている。
更にベロー状パツキン７先端の内周面に設けた弾
性突起８は保持筒３のやや大径の基部外周面に気
密的に圧接していてベロー状パツキン７内周と保
持筒３外周との間から胴部７ａの内周面側へガス
が流出しないようにシールしており、保持筒３の
内口をガスが流れるようにして保持筒３の先端に
だけガス流入用開口６のような孔をあけてあるか
ら、保持筒３の内口を流れるガスが保持筒３を通
つてベロー状パツキン７の内周面側へ漏れること
がなく、ベロー状パツキン７の胴部７ａ内周面と
保持筒３外周面との間へは決してガスが流れ込む
ことがないようになつており、したがつてベロー
状パツキン７を繰返し伸縮させて比較的薄肉の胴
部７ａを何度も変形させているうちに、万一胴部
７ａに孔あきや亀裂等が生じてもソケツトＡの外
部にガスが漏出しないようになつている。なおベ
ロー状パツキン７の内周面には複数個の弾性突起
８を周設してあるので、単にシール効果を高める
ばかりでなく、ベロー状パツキン７の成形時に一
方の弾性突起８にばり等が生じていても他方の弾
性突起８によりシールできるので製品の信頼性が
向上し、更に弾性突起８間の環状溝１６内に真空
グリスを充填しておくと一層シール効果が増し、
弾性突起８の摩耗を軽減するものであり、しかも
真空グリスは環状溝１６内に保持されていてプラ
グＢの頭部２に付着したりする心配のないもので
ある。 In this state, as shown in FIG. 6, when the plug B is inserted into the socket main body 1, the spherical band surface 24 at the tip of the plug B presses against the band-shaped ring part 23 of the bellows-shaped packing 7 and presses it, thereby increasing the elasticity of the coil spring 10. When the inside of the socket body 1 is press-fitted into the plug B while compressing the bellows-like gasket 7 against the force, the valve body 4 is retracted by the push rod 5 to open the valve body 4, and the valve body 4 is opened from the plug B through the bypass groove 25. The outflowing gas advects from the gas inflow opening 6 to the holding cylinder 3, and further flows out into the hose through the inside of the outflow side cylinder part 1a. When the bellows-shaped packing 7 is further compressed and the socket body 1 is inserted into the plug B, the V-shaped groove 26 provided around the outer peripheral surface of the head 2 of the plug B comes directly below the through hole 13 of the socket body 1.
At this time, the steel ball 9 has lost the metal ring 21 on the outer periphery of the flange 20b of the bellows-shaped gasket 7 that was in contact with the lower surface, and the upper surface of the steel ball 9 is pushed by the step 18 of the operation ring 11, so the plug B V-shaped groove 26
I feel depressed. The steel ball 9 is in the V-shaped groove 26 of the plug B.
When the steel ball 9 falls down, the operating ring 11 that was locked on the upper surface of the steel ball 9 becomes free and is pushed by the spring 19 and moves to the right, so that the rear inner circumferential surface 11a of the operating ring 11 is placed above the steel ball 9. , the steel ball 9 is prevented from protruding to the outer circumferential surface of the inflow side cylindrical portion 1b, so the plug B is locked to the steel ball 9 in the V-shaped groove 26, and the socket A and the plug B are naturally connected. It will not come off. Here, even if the bellows-like packing 7 is compressed and deformed, the body 7a is only brought into pressure contact with the outer periphery of the holding cylinder 3, so that the gas flow is not obstructed.
In the connection state between socket A and plug B,
Due to the elastic force of the compressed coil spring 10, the band-shaped ring portion 23 is brought into pressure contact with the spherical band surface 24 of the plug B, and airtightness between the tip of the bellows-shaped packing 7 and the tip of the plug B is maintained. In addition, the flange 20a of the bellows-shaped packing 7 is pressed against the bottom of the gap 17 by a washer 22 to keep the base end of the bellows-shaped packing 7 airtight and prevent gas from leaking out of the bellows-shaped packing 7. There is.
Furthermore, an elastic protrusion 8 provided on the inner circumferential surface of the tip of the bellows-shaped packing 7 is in airtight pressure contact with the outer circumferential surface of the slightly larger diameter base of the holding cylinder 3, so that there is a gap between the inner circumference of the bellows-shaped packing 7 and the outer circumference of the holding cylinder 3. A hole such as a gas inflow opening 6 is provided only at the tip of the holding cylinder 3 to allow the gas to flow through the inner opening of the holding cylinder 3. Since the opening is made, the gas flowing through the inner opening of the holding cylinder 3 does not leak through the holding cylinder 3 to the inner circumferential surface of the bellows-shaped packing 7, and the inner circumferential surface of the body 7a of the bellows-shaped packing 7 and the holding Gas never flows into the space between the tube 3 and the outer circumferential surface of the cylinder 3. Therefore, the bellows-like packing 7 is repeatedly expanded and contracted to deform the relatively thin body 7a many times. Furthermore, even if a hole or crack should occur in the body 7a, gas will not leak out of the socket A. Since a plurality of elastic protrusions 8 are provided around the inner peripheral surface of the bellows-shaped packing 7, this not only enhances the sealing effect, but also prevents burrs from forming on one of the elastic protrusions 8 during molding of the bellows-shaped packing 7. Even if the elastic protrusion 8 is formed, the seal can be sealed by the other elastic protrusion 8, which improves the reliability of the product.Furthermore, if the annular groove 16 between the elastic protrusions 8 is filled with vacuum grease, the sealing effect is further increased.
This reduces wear on the elastic protrusion 8, and since the vacuum grease is held within the annular groove 16, there is no fear of it adhering to the head 2 of the plug B.

逆に互いに接続されたソケツトＡとプラグＢと
を離脱するには、第６図の状態から操作環１１を
持つて左方へ引くと操作環１１はばね１９に抗し
て左方に引き込まれ、鋼球９の上面を押さえてい
るものがなくなるから、プラグＢはベロー状パツ
キン７とその外周に介挿されたコイルばね１０と
の力で押出され、鋼球９はベロー状パツキン７の
フランジ２０ｂ外周面に押上げられ、その上面が
流入側筒部１ｂ外周面上に突出するから手で引込
まれた操作環１１はその操作環１１の段部１８が
再び鋼球９の上面に当接して係止される。第３図
の状態に復すると、同時にプラグＢの弁体４は押
棒５から離れてプラグＢを閉塞するものである。
この離脱時においてはベロー状パツキン７は伸長
していて弾性突起８は小径部３ａに軽く接してお
り、このとき弾性突起８は保持筒３の基部による
弾性変形から回復しており、弾性疲労による弾性
突起８のシール効果の低下を防止されている。し
かもこのとき弾性突起８は小径部３ａに軽く接し
ているので内部にちりやほこりが侵入しないので
ある。 Conversely, in order to disconnect socket A and plug B that are connected to each other, hold the operating ring 11 and pull it to the left from the state shown in FIG. , since there is no longer anything holding down the upper surface of the steel ball 9, the plug B is pushed out by the force of the bellows-shaped packing 7 and the coil spring 10 inserted on its outer periphery, and the steel ball 9 is pushed out from the flange of the bellows-shaped packing 7. 20b, and its upper surface protrudes above the outer peripheral surface of the inflow-side cylinder portion 1b, so that when the operating ring 11 is manually pulled in, the stepped portion 18 of the operating ring 11 comes into contact with the upper surface of the steel ball 9 again. It is locked. When the state shown in FIG. 3 is restored, the valve body 4 of the plug B separates from the push rod 5 and closes the plug B at the same time.
At this time of detachment, the bellows-like packing 7 is elongated and the elastic protrusion 8 is in light contact with the small diameter portion 3a.At this time, the elastic protrusion 8 has recovered from the elastic deformation caused by the base of the holding cylinder 3, and is due to elastic fatigue. This prevents the sealing effect of the elastic protrusion 8 from deteriorating. Moreover, since the elastic protrusion 8 is in light contact with the small diameter portion 3a at this time, dirt and dust do not enter the inside.

第７図及び第８図に示すものは本考案の他の実
施例であり、保持筒３の先端部が円錐台状をして
いてこの部分が保持筒３の延出基部部分よりも小
径となつた小径部３ａとなつており、この円錐台
状をした小径部３ａにガス流入用開口６が設けて
あるとともに小径部３ａの先端が押棒５となつて
いるものである。ここでソケツトＡとプラグＢと
を接続してベロー状パツキン７を圧縮させたとき
には第８図のように弾性突起８が保持筒３外周に
気密的に圧接し、ソケツトＡをプラグＢから離脱
してベロー状パツキン７を伸長させたときには第
７図のように弾性突起８が保持筒３の延出基部の
大径の部分から外れて先端の円錐台状となつた小
径部３ａに対向して、弾性変形から回復するよう
にしたものである。 7 and 8 are other embodiments of the present invention, in which the tip of the holding tube 3 is shaped like a truncated cone, and this portion has a smaller diameter than the extending base portion of the holding tube 3. This truncated cone-shaped small diameter portion 3a is provided with a gas inflow opening 6, and a push rod 5 is provided at the tip of the small diameter portion 3a. When socket A and plug B are connected and bellows-like packing 7 is compressed, elastic protrusion 8 comes into airtight pressure contact with the outer periphery of holding cylinder 3, as shown in Fig. 8, and socket A is separated from plug B. When the bellows-like packing 7 is extended, the elastic protrusion 8 comes off the large diameter part of the extended base of the holding cylinder 3 and faces the small diameter part 3a which has a truncated cone shape at the tip, as shown in FIG. , which is designed to recover from elastic deformation.

本考案は叙述の如く流出側筒部の端部付近から
流入側筒部内へ保持筒を延出し、保持筒外周と流
入側筒部との間に伸縮自在なベロー状パツキンを
嵌入してあるから、ベロー状パツキンは保持筒に
より内周側からガードされ、ベロー状パツキンが
圧縮されたときに内周側へ潰れてガスの流れを妨
げることがなく、特別にベロー状パツキンの保形
用のばねを必要とせず、部品点数を削減し、組立
てを容易にできる利点がある。更に保持筒の先端
にガス流入用開口を設け、プラグ接続時に保持筒
外周面に気密的に弾接させ且つプラグ非接続時に
保持筒の延出先端部の小径となつた部分の外周に
対向する弾性突起をベロー状パツキン先端部の内
周面に周設してあるから、ベロー状パツキンは保
持筒によりガスから隔離されており、しかもプラ
グ接続時に弾性突起が保持筒外周面に気密的に圧
接していることによつてベロー状パツキンと保持
筒との間の間隙からベロー状パツキンの内周側に
ガスが侵入することも阻止されており、万一ベロ
ー状パツキンに孔あきや亀裂等が生じてもそこか
らソケツトの外部へガスが漏出する心配がなく、
優れて安全性が高いという利点があり、またプラ
グ非接続時に弾性突起が保持筒の延出先端部の小
径となつた部分の外周に対向するのでプラグ非接
続時には弾性突起が小径部の外周に強く弾接する
ことがなく、この結果プラグ非接続時に弾性突起
には力が加わることがなく弾性変形をしないもの
であつて、弾性突起が長期間経過しても劣化しな
いという効果がある。 As described above, in the present invention, the holding cylinder extends from near the end of the outflow side cylinder part into the inflow side cylinder part, and a bellows-like packing that can be freely expanded and contracted is fitted between the outer periphery of the holding cylinder and the inflow side cylinder part. The bellows-shaped packing is guarded from the inner circumference by a holding cylinder, and when the bellows-shaped packing is compressed, it does not collapse to the inner circumference and impede the gas flow. This has the advantage of reducing the number of parts and making assembly easier. Furthermore, a gas inflow opening is provided at the tip of the holding cylinder, and when the plug is connected, the gas inflow opening is brought into airtight elastic contact with the outer peripheral surface of the holding cylinder, and when the plug is not connected, it is opposite to the outer periphery of the small diameter portion of the extending tip of the holding cylinder. Since the elastic protrusion is provided around the inner circumferential surface of the tip of the bellows-shaped packing, the bellows-shaped packing is isolated from the gas by the holding cylinder, and when the plug is connected, the elastic protrusion is pressed against the outer circumferential surface of the holding cylinder in an airtight manner. This prevents gas from entering the inner circumferential side of the bellows-like packing through the gap between the bellows-like packing and the holding cylinder, and prevents holes or cracks in the bellows-like packing by any chance. There is no need to worry about gas leaking to the outside of the socket even if it occurs.
It has the advantage of being excellent and highly safe, and when the plug is not connected, the elastic protrusion faces the outer periphery of the small diameter part of the extending tip of the holding cylinder, so when the plug is not connected, the elastic protrusion faces the outer periphery of the small diameter part. There is no strong elastic contact, and as a result, when the plug is not connected, no force is applied to the elastic protrusions and they do not undergo elastic deformation, and the elastic protrusions do not deteriorate over a long period of time.

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

第１図は従来のソケツトを示す上半部を切欠し
た側面図、第２図は同上のソケツトをプラグと接
続したときの上半部を切欠した側面図、第３図は
本考案の一実施例を示す上半部を切欠した側面
図、第４図は第３図のＸ矢視図、第５図は同上の
ベロー状パツキンを示す下半部を切欠した側面
図、第６図は同上のソケツトをプラグと接続した
ときの上半部を切欠した側面図、第７図は本考案
の他の実施例を示す上半部を切欠した側面図、第
８図は同上のソケツトをプラグと接続たときの上
半部を切欠した側面図である。 １……ソケツト本体、１ａ……流出側筒部、１
ｂ……流入側筒部、２……プラグの頭部、３……
保持筒、４……プラグの弁体、５……押棒、６…
…ガス流入用開口、７……ベロー状パツキン、８
……弾性突起、９……鋼球、Ｂ……プラグ。 Figure 1 is a side view with the upper half cut away showing a conventional socket, Figure 2 is a side view with the upper half cut away when the above socket is connected to a plug, and Figure 3 is an implementation of the present invention. FIG. 4 is a side view with the upper half cut away showing an example, FIG. 4 is a view taken in the direction of the X arrow in FIG. Fig. 7 is a side view with the upper half cut away showing another embodiment of the present invention, and Fig. 8 is a side view with the upper half cut away when the above socket is connected with the plug. FIG. 3 is a side view with the upper half cut away when connected. 1... Socket body, 1a... Outflow side cylinder part, 1
b...Inflow side cylinder part, 2...Plug head, 3...
Holding cylinder, 4... Plug valve body, 5... Push rod, 6...
...Gas inflow opening, 7...Bellow-shaped packing, 8
...Elastic protrusion, 9...Steel ball, B...Plug.

Claims (1)

【実用新案登録請求の範囲】 (1) ガス流出側となる流出側筒部とプラグの頭部
を挿入される流入側筒部とからソケツト本体を
構成し、流出側筒部の端部付近から流入側筒部
内へ保持筒を延出し、この保持筒の延出基部側
を大径とし且つ延出先端部をやや小径に形成
し、プラグの弁体を押すための押棒とガス流入
用開口を保持筒の先端に設け、保持筒外周と流
入側筒部内周との間に伸縮自在なベロー状パツ
キンを嵌入し、プラグ接続時に保持筒の延出基
部側の大径となつた外周面に気密的に圧接させ
且つプラグ非接続時に保持筒の延出先端部の小
径となつた部分の外周に対向する弾性突起をベ
ロー状パツキン先端部の内周面に周設し、流入
側筒部先端部にプラグ連結用の鋼球を保持して
成る管接続具。 (2) 上記弾性突起をベロー状パツキンの内周面に
複数条周設して弾性突起と弾性突起との間に環
状溝を設けて成る実用新案登録請求の範囲第１
項記載の管接続具。[Scope of Claim for Utility Model Registration] (1) The socket body is composed of an outflow side cylindrical part which is the gas outflow side and an inflow side cylindrical part into which the head of the plug is inserted, and from near the end of the outflow side cylindrical part A holding cylinder is extended into the inflow side cylinder part, the extending base side of this holding cylinder is made large in diameter, the extending tip part is formed in a slightly small diameter, and a push rod for pushing the valve body of the plug and a gas inflow opening are provided. A bellows-shaped packing is provided at the tip of the holding cylinder and is fitted between the outer circumference of the holding cylinder and the inner circumference of the inlet side cylinder, and when the plug is connected, the large diameter outer peripheral surface of the extended base side of the holding cylinder is airtight. An elastic protrusion is provided around the inner circumferential surface of the bellows-shaped packing tip, and the elastic protrusion is brought into pressure contact with the inner circumferential surface of the bellows-shaped packing tip and faces the outer circumference of the small-diameter portion of the extending tip of the holding tube when the plug is not connected. A pipe fitting that holds a steel ball for plug connection. (2) Utility model registration claim No. 1, in which a plurality of the above-mentioned elastic protrusions are provided on the inner circumferential surface of a bellows-like packing, and an annular groove is provided between the elastic protrusions.
Pipe fittings as described in Section.