JP5268100B2

JP5268100B2 - Pipe fitting

Info

Publication number: JP5268100B2
Application number: JP2008266293A
Authority: JP
Inventors: 智明田中
Original assignee: Toyox Co Ltd
Current assignee: Toyox Co Ltd
Priority date: 2008-10-15
Filing date: 2008-10-15
Publication date: 2013-08-21
Anticipated expiration: 2028-10-15
Also published as: JP2010096230A

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent the come-off of a male member from a female member. <P>SOLUTION: One of the female member 1 and the male member 2 has an expansive portion 3 to be elastically deformed in the radial direction during insertion, and the other has a locking portion 4 for engaging with the expansive portion 3 in the axial direction and a sliding portion 5 opposed to the front end of the expansive portion 3 reciprocatively in the axial direction. The sliding portion 5 is arranged so as to be moved in the axial direction while abutting on the expansive portion 3 during the insertion of the male member 2 into the female member 1 and to be moved in opposition thereto during the engagement of the locking portion 4 with the expansive portion 3 to hold the expansive portion 3 between the sliding portion 5 and the locking portion 4 in the radial direction. Thus, in the state of connecting the female member 1 to the male member 2, the expansive portion 3 is held between the sliding portion 5 and the locking portion 4 in the radial direction, and so the expansive portion 3 is prohibited from being deformed with its diameter enlarged/shrunk and prevented from coming off from the locking portion 4. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、例えば合成樹脂やゴムなどの弾性材料からなるチューブやホース又は硬質材料からなるパイプなどの導管を、差し込むだけで接続できる工具不要なワンタッチ式の管継手に関する。
詳しくは、継手本体と導管とを、それらに取り付けられた筒状の雌部材及び雄部材の軸方向への挿入により互いに嵌合させて接続する管継手に関する。 The present invention relates to a tool-free one-touch type pipe joint that can be connected by simply inserting a tube such as a tube or hose made of an elastic material such as synthetic resin or rubber, or a pipe made of a hard material.
Specifically, the present invention relates to a pipe joint that connects and connects a joint body and a conduit to each other by inserting a cylindrical female member attached thereto and a male member in the axial direction.

従来、この種の管継手として、雌部材のソケット金具に対し、ホースが接続された雄部材を挿入して、この雄部材に装着されたロックリングの係止部を、該ソケット金具の内周面に形成された被係止部の面取り部に当接させることにより、このロックリングの外径が縮小し、その係止部が前記ソケット金具の被係止部に圧接しながら乗り越えると、自身の弾性でロックリングの径が元に戻り、該係止部と前記ソケット金具の被係止部が係止され、雌部材に雄部材が抜け止めされた状態で連結され、また、雌部材から雄部材を外すには、上記と逆にロックリングを両側から押圧して外径を縮めることにより引き抜きが可能となるものがある（例えば、特許文献１参照）。 Conventionally, as a pipe joint of this type, a male member to which a hose is connected is inserted into a socket fitting of a female member, and an engaging portion of a lock ring attached to the male member is connected to the inner periphery of the socket fitting. By contacting the chamfered portion of the locked portion formed on the surface, the outer diameter of the lock ring is reduced, and when the locking portion gets over the locked portion of the socket metal fitting, Due to the elasticity of the lock ring, the diameter of the lock ring is restored, the locking portion and the locked portion of the socket fitting are locked, and the male member is connected to the female member in a state in which the male member is prevented from coming off. In order to remove the male member, there is a member that can be pulled out by pressing the lock ring from both sides to reduce the outer diameter in reverse to the above (for example, see Patent Document 1).

特開２００８−２５８０４号公報（第４−６頁、図１，４，６，７）JP 2008-25804 A (page 4-6, FIGS. 1, 4, 6 and 7)

しかし乍ら、このような従来の管継手では、ロックリングの縮径操作で雌部材から雄部材が容易に着脱可能であるが、これら雌部材と雄部材の連結状態で不意にロックリングを縮径させる方向へ力が掛かると、雌部材から雄部材が抜け出るおそれがあった。
ところで、工具不要なワンタッチ式の管継手は、例えば天井裏などの接続作業が困難な場所で特に有効であるが、上述したように連結状態で不意な力が作用すると抜けるおそれがあると、流体の漏れなどの大規模な事故に発展する可能性があって使用できないという問題があった。 However, in such a conventional pipe joint, the male member can be easily attached to and detached from the female member by the diameter reduction operation of the lock ring, but the lock ring is unexpectedly contracted when the female member and the male member are connected. When a force is applied in the diameter direction, the male member may come out of the female member.
By the way, a tool-free one-touch type pipe joint is particularly effective in places where connection work is difficult, such as the back of a ceiling, but if there is a risk that it will come off when an unexpected force is applied in a connected state as described above, There was a problem that it could not be used because it could develop into a large-scale accident such as leakage of water.

本発明のうち第一の発明は、雌部材からの雄部材の抜けを確実に防止することを目的としたものである。
さらに、流体を管内抵抗なしでスムーズに流すことを目的としたものである。
さらに、一部品のスライド部で確実なロック作動を実現することを目的としたものである。
第二の発明は、第一の発明の目的に加えて、導管の接続状態を目視で確認することを目的としたものである。 The first invention of the present invention aims to reliably prevent the male member from coming off from the female member.
Furthermore , it aims at flowing the fluid smoothly without resistance in the pipe.
Further , it is intended to realize a reliable locking operation with a single slide part.
The second invention is, in addition to the first inventions of interest is intended to check the connection state of the conduit visually.

前述した目的を達成するために、本発明のうち第一の発明は、継手本体と、チューブ，ホース又はパイプからなる導管と、前記導管に取り付けられる筒状の雌部材と、前記継手本体に取り付けられて軸方向への挿入により前記雌部材と互いに嵌合する雄部材と、前記雌部材に設けられて前記雌部材に対する前記雄部材の挿入に伴って径方向へ弾性変形する拡縮部と、前記雄部材に設けられて前記拡縮部と軸方向へ係合する係止部と、前記雄部材に前記拡縮部の先端と対向して軸方向へ往復動自在に設けられるスライド部と、前記雄部材に前記導管の接続端部の内周面と対向するように連設されるニップルと、前記雌部材に前記導管の接続端部の外周面を覆うように連設されるスリーブと、を備え、前記スライド部は、筒状に形成されて伸縮用スリットを軸方向へ螺旋状に開設し、前記雌部材に対する前記雄部材の挿入に伴い前記拡縮部と当接して軸方向へ移動し、前記拡縮部と前記係止部の係合に伴い逆移動して、前記スライド部と前記係止部との間に前記拡縮部を径方向へ挟み込むとともに、前記ニップルと前記スリーブとの間に前記導管の接続端部を径方向へ挟み込むことを特徴とするものである。
第二の発明は、第一の発明の構成に、前記拡縮部及びスリーブに、軸方向へ延びる縮径用スリットを切欠形成した構成を加えたことを特徴とする。
第三の発明は、第一の発明又は第二の発明の構成に、前記導管が弾性材料からなるチューブ，ホースであり、前記導管の外周に、前記スリーブを挟んで締め付け部材が取り付けられ、前記締め付け部材の締め付け力で前記スリーブを縮径変形させることを特徴とする。
第四の発明は、第三の発明の構成に、前記導管の開口部内に着脱自在に挿着されるキャップが備えられることを特徴とする。 To achieve the above object, the first invention of the present invention, and the fitting body, the tube, a conduit comprising a hose or a pipe, a tubular female member that is attached to the conduit, said fitting body A male member that is attached and fitted to the female member by insertion in the axial direction; and an expansion / contraction portion that is provided on the female member and elastically deforms in the radial direction as the male member is inserted into the female member ; wherein a locking portion provided on the male member engages to the scaling unit and the axial direction, and a slide portion that is provided to freely reciprocate in the axial direction to face the front end of the male member to the scaling unit, the A nipple connected to the male member so as to face the inner peripheral surface of the connection end of the conduit; and a sleeve connected to the female member so as to cover the outer peripheral surface of the connection end of the conduit; The slide part is formed in a cylindrical shape for expansion and contraction. Opened helically slit in the axial direction, the moving the relative female member in contact with the scaling unit due to the insertion of the male member those in the axial direction, opposite movement with the engagement of the locking portion and the scaling unit and, with sandwiching the radial direction the scaling unit between the locking portion and the sliding portion, characterized in that sandwich the connection end of the conduit to radially between said nipple sleeve Is .
The second invention, the first inventions of configuration, before Symbol scaling unit and the sleeve, and wherein the addition of structure forming notch a reduced diameter contouring slit extending in the axial direction.
A third invention is a tube or hose in which the conduit is made of an elastic material in the configuration of the first invention or the second invention, and a fastening member is attached to the outer periphery of the conduit with the sleeve interposed therebetween, The sleeve is reduced in diameter by a tightening force of a tightening member.
According to a fourth aspect of the present invention, in the configuration of the third aspect of the present invention, a cap that is detachably inserted into the opening of the conduit is provided.

本発明のうち第一の発明は、雌部材及び雄部材のいずれか一方に、これらの挿入に伴って径方向へ弾性変形する拡縮部を設け、他方には該拡縮部と軸方向へ係合する係止部を設けるとともに、前記拡縮部の先端と対向するスライド部を軸方向へ往復動自在に設け、このスライド部を、前記雌部材に対する前記雄部材の挿入に伴い前記拡縮部と当接して軸方向へ移動させ、この拡縮部と前記係止部の係合に伴い逆移動して、該スライド部と前記係止部との間に前記拡縮部を径方向へ挟み込むように配置することにより、雌部材と雄部材の連結状態で、拡縮部がスライド部と係止部との間に径方向へ挟み込まれて、該拡縮部が拡径変形又は縮径変形できず係止部から外れない。
したがって、雌部材からの雄部材の抜けを確実に防止することができる。
その結果、雌部材と雄部材の連結状態で不意にロックリングを縮径させる方向へ力が掛かると雌部材から雄部材が抜け出る従来のものに比べ、流体の漏れなどの事故が発生せず、安全であり、例えば天井裏やなどの接続作業が困難な場所で特に有効である。 According to the first aspect of the present invention, either the female member or the male member is provided with an expanding / contracting portion that elastically deforms in the radial direction upon insertion thereof, and the other is engaged with the expanding / contracting portion in the axial direction. And a sliding portion facing the tip of the expanding / contracting portion is provided so as to freely reciprocate in the axial direction, and the sliding portion abuts on the expanding / contracting portion as the male member is inserted into the female member. To move in the axial direction, and reversely move with the engagement of the expansion / contraction portion and the locking portion, so that the expansion / contraction portion is sandwiched in the radial direction between the slide portion and the locking portion. Thus, in the connected state of the female member and the male member, the expanding / contracting portion is sandwiched in the radial direction between the slide portion and the locking portion, and the expanding / contracting portion cannot be enlarged or deformed and detached from the locking portion. Absent.
Therefore, the male member can be reliably prevented from coming off from the female member.
As a result, accidents such as fluid leakage do not occur compared to the conventional one in which the male member is pulled out from the female member when a force is applied in the direction in which the diameter of the lock ring is unexpectedly reduced in the connected state of the female member and the male member, It is safe and is particularly effective in places where connection work is difficult, such as behind the ceiling.

さらに加えて、雌部材に拡縮部を配置し、雄部材に係止部とスライド部を配置することにより、流体が通る雄部材の内周面に突起物がなく平滑に形成可能となる。
したがって、流体を管内抵抗なしでスムーズに流すことができる。 In addition to the further, the scaling unit is arranged in the female member, by disposing the engaging portion and the sliding portion to the male member, the projections on the inner peripheral surface of the male member through which the fluid is formed smooth possible without.
Therefore, the fluid can flow smoothly without any resistance in the pipe.

さらに加えて、スライド部を筒状に形成して伸縮用スリットを軸方向へ螺旋状に開設することにより、拡縮部の当接に伴って該スライド部全体が軸方向へ圧縮変形するとともに、拡縮部が係止部に係合してスライド部との当接が外れると、該スライド部が伸張変形して、係止部との間に拡縮部が径方向へ挟み込まれる。
したがって、一部品のスライド部で確実なロック作動を実現することができる。
その結果、部品点数が減って全体の構造を簡素化できるとともに製造コストの低減化も図れる。 In addition to the further, by opening the expansion slit formed in the cylindrical slide portion in the axial direction in a spiral shape, with the entire the slide portion is compressed and deformed in the axial direction with the abutment of the expansion portion, When the expansion / contraction portion engages with the locking portion and the contact with the slide portion is released, the slide portion expands and deforms, and the expansion / contraction portion is sandwiched in the radial direction between the expansion portion and the locking portion.
Therefore, a reliable locking operation can be realized with a single slide part.
As a result, the number of parts can be reduced, the entire structure can be simplified, and the manufacturing cost can be reduced.

第二の発明は、第一の発明の効果に加えて、雌部材及び雄部材のいずれか一方にニップルを連設し、他方に拡縮部とスリーブを連設して、これらニップルとスリーブとの間に導管を挟み込み、拡縮部及びスリーブに、軸方向へ延びる縮径用スリットを切欠形成することにより、縮径用スリットを通して導管が外部から目視可能となる。
したがって、導管の接続状態を目視で確認することができる。
その結果、天井裏などの配管作業が行い難い場所においても、管接続状態が目視より容易に確認できて、非常に便利である。
The second invention is, in addition to the first inventions effects, the nipple is continuously provided on one of the female member and the male member, and continuously provided the scaling unit and the sleeve to the other, and these nipple and the sleeve By sandwiching the conduit between them and forming a slit for diameter reduction extending in the axial direction in the expansion / contraction part and the sleeve, the conduit becomes visible from the outside through the slit for diameter reduction.
Therefore, the connection state of the conduit can be visually confirmed.
As a result, even in places where it is difficult to perform piping work such as the ceiling, the pipe connection state can be easily confirmed by visual observation, which is very convenient.

本発明の管継手の実施形態は、図１〜図６に示す如く、継手本体Ａ又は例えばチューブやホース又はパイプなどの導管Ｂの一方に取り付けられる大径な円筒状の雌部材１と、該継手本体Ａ又は導管Ｂの他方に取り付けられる小径な円筒状の雄部材２と、これら雌部材１及び雄部材２のいずれか一方に設けられる径方向へ弾性変形可能な拡縮部３と、該雌部材１及び雄部材２の他方に設けられる該拡縮部３に軸方向へ係合する係止部４及び軸方向へ往復動自在なスライド部５とを備えている。 1 to 6, the embodiment of the pipe joint of the present invention includes a large-diameter cylindrical female member 1 attached to one of a joint body A or a conduit B such as a tube, a hose, or a pipe, A small-diameter cylindrical male member 2 attached to the other of the joint body A or the conduit B, an expansion / contraction portion 3 that is elastically deformable in a radial direction, provided on one of the female member 1 and the male member 2, and the female The expansion / contraction part 3 provided in the other of the member 1 and the male member 2 is provided with a locking part 4 that engages in the axial direction and a slide part 5 that can reciprocate in the axial direction.

そして、継手本体Ａと導管Ｂの配管接続時には、雌部材１に対して雄部材２を軸方向へ挿入することにより、先ず、拡縮部３が径方向へ弾性的に拡径又は縮径変形しながら、その先端がスライド部５に当接して該スライド部５を、雄部材２の挿入方向へ移動させる。 When the joint body A and the conduit B are connected to the pipe, the male member 2 is inserted into the female member 1 in the axial direction so that the expansion / contraction portion 3 is first elastically expanded or contracted in the radial direction. However, the front end abuts on the slide portion 5 to move the slide portion 5 in the insertion direction of the male member 2.

次に、拡縮部３が係止部４と対向する位置に到達したところで、該拡縮部３が径方向へ逆に縮径又は拡径変形して復元し、それにより係止部４と少なくとも雄部材２の挿入方向と逆向きに係合することにより、これら雌部材１と雄部材２が互いに嵌合して継手本体Ａと導管Ｂが連結されるとともに、該拡縮部３の径方向変形により、スライド部５が雄部材２の挿入方向と逆向きに移動して、該スライド部５と雄部材２及び係止部４との間に拡縮部３が径方向へ挟み込まれるようにしている。 Next, when the expanding / contracting portion 3 reaches a position facing the locking portion 4, the expanding / contracting portion 3 is restored by being contracted or expanded in diameter in the opposite direction in the radial direction, whereby at least the locking portion 4 and the male portion are restored. By engaging the female member 1 and the male member 2 in an opposite direction to the insertion direction of the member 2, the joint body A and the conduit B are connected to each other, and the expansion / contraction portion 3 is deformed in the radial direction. The slide portion 5 moves in the direction opposite to the insertion direction of the male member 2 so that the expansion / contraction portion 3 is sandwiched in the radial direction between the slide portion 5 and the male member 2 and the locking portion 4.

また、雌部材１と雄部材２のいずれか一方には、導管Ｂの内径と略同じか又はそれよりも若干大きい外径を有する円筒状のニップル６を連設し、他方には、該導管Ｂの外径と略同じか又はそれよりも若干大きい内径を有する円筒状のスリーブ７を連設して、これらニップル６とスリーブ７との間に導管Ｂを挟み込んで軸方向へ移動不能に支持することが好ましい。
以下、本発明の各実施例を図面に基づいて説明する。 Further, either one of the female member 1 and the male member 2 is provided with a cylindrical nipple 6 having an outer diameter substantially the same as or slightly larger than the inner diameter of the conduit B, and the other is connected to the conduit. A cylindrical sleeve 7 having an inner diameter substantially the same as or slightly larger than the outer diameter of B is provided continuously, and the conduit B is sandwiched between the nipple 6 and the sleeve 7 so as to be immovable in the axial direction. It is preferable to do.
Embodiments of the present invention will be described below with reference to the drawings.

この実施例１は、図１〜図３に示す如く、前記継手本体Ａの軸方向一端側のみに前記雄部材２と前記ニップル６を連設し、この雄部材２の外周面に係止部４を設けるとともに、これら雄部材２の一部外周及び係止部４を覆うように前記スライド部５が軸方向へ往復動自在に設けられ、前記雌部材１に前記拡縮部３と前記スリーブ７を連設し、このスリーブ７を前記導管Ｂの接続端部の外周に挿通して、環状の締め付け部材８により軸方向へ移動不能に取り付け、該スリーブ７において導管Ｂの挿入方向（以下「管挿入方向」という）先端には雌部材１と拡縮部３を配置し、また継手本体Ａの軸方向他端には、他の機器の管接続口（図示せず）に接続するための接続具９が連設される場合を示すものである。 In the first embodiment, as shown in FIGS. 1 to 3, the male member 2 and the nipple 6 are connected to only one end side in the axial direction of the joint body A, and a locking portion is provided on the outer peripheral surface of the male member 2. 4, the slide portion 5 is provided so as to reciprocate in the axial direction so as to cover a part of the outer periphery of the male member 2 and the locking portion 4, and the expansion / contraction portion 3 and the sleeve 7 are provided on the female member 1. The sleeve 7 is inserted into the outer periphery of the connection end of the conduit B, and is attached so as not to move in the axial direction by an annular fastening member 8. The female member 1 and the expansion / contraction part 3 are arranged at the tip (referred to as “insertion direction”), and the other end in the axial direction of the joint body A is connected to a pipe connection port (not shown) of another device. The case where 9 is connected is shown.

図示例では、図１（ｂ）及び図３（ａ）に示す如く、継手本体Ａに雄部材２とニップル６を、管挿入方向と逆方向（以下「反挿入方向」という）へ順次形成し、この雄部材２の外周面には、ニップル６の外径よりも小さい凹状の係止部４を、管挿入方向へ向けて外径が徐々に大径となる傾斜状に形成するとともに、これら雄部材２及び係止部４と対向するように円筒状のスライド部５を、管挿入方向及び反挿入方向へ伸縮自在に形成して、継手本体Ａの外周に挿着している。 In the illustrated example, as shown in FIGS. 1B and 3A, the male member 2 and the nipple 6 are sequentially formed in the joint body A in the direction opposite to the tube insertion direction (hereinafter referred to as “anti-insertion direction”). On the outer peripheral surface of the male member 2, a concave locking portion 4 smaller than the outer diameter of the nipple 6 is formed in an inclined shape in which the outer diameter gradually increases toward the tube insertion direction. A cylindrical slide portion 5 is formed so as to be able to expand and contract in the tube insertion direction and the anti-insertion direction so as to face the male member 2 and the locking portion 4, and is inserted into the outer periphery of the joint body A.

さらに、導管Ｂの接続端部の外周には、図１（ｂ）及び図３（ａ）に示す如く、スリーブ７を挟んで締め付け部材８が取り付けられ、この締め付け部材８の締め付け力で該スリーブ７を縮径変形させることにより、スリーブ７の内周面が導管Ｂの接続端部の外周面に密着して移動不能に組み付けられ、雌部材１及び拡縮部３の内周面には、ニップル６の外径よりも小さくて雄部材２の凹状係止部４と嵌め合う凸状部分１ａを管挿入方向へ向けて内径が徐々に大径となる傾斜状に一体形成している。 Further, as shown in FIGS. 1B and 3A, a fastening member 8 is attached to the outer periphery of the connection end of the conduit B with the sleeve 7 interposed therebetween. 7, the inner peripheral surface of the sleeve 7 is brought into close contact with the outer peripheral surface of the connecting end portion of the conduit B and is immovably assembled. The inner peripheral surfaces of the female member 1 and the expanding / contracting portion 3 are connected to the nipple. A convex portion 1a that is smaller than the outer diameter of 6 and fits with the concave locking portion 4 of the male member 2 is integrally formed in an inclined shape so that the inner diameter gradually increases toward the tube insertion direction.

その他の例として図示しないが、雄部材２の外周面に係止部４を管挿入方向へ向けて外径が徐々に大径となる凸状に形成し、これと対向して雌部材１及び拡縮部３の内周面には、該係止部４と嵌め合うように管挿入方向へ向けて内径が徐々に大径となる傾斜状の凹状部分を形成することも可能である。 Although not shown as another example, the engaging portion 4 is formed on the outer peripheral surface of the male member 2 in a convex shape with the outer diameter gradually increasing toward the tube insertion direction, and the female member 1 and On the inner peripheral surface of the expansion / contraction part 3, it is also possible to form an inclined concave part having an inner diameter that gradually increases in the tube insertion direction so as to fit with the locking part 4.

これら雄部材２及び係止部４と対向するように配置されるスライド部５は、図１（ｂ）及び図３（ａ）に示す如く、例えばポリアセタール樹脂やそれ以外の表面の滑り性と耐熱性に優れた合成樹脂などの弾性変形可能な材料で、拡縮部３の縮径時における外径と嵌り合う内径を有する円筒状に形成されるとともに、軸方向へ螺旋状に延びる伸縮用スリット５ａを開設することにより、全体的に軸方向へ伸縮変形可能にしている。 As shown in FIGS. 1 (b) and 3 (a), the slide portion 5 disposed so as to face the male member 2 and the locking portion 4 is made of, for example, polyacetal resin or other surface slipperiness and heat resistance. An elastically deformable material such as a synthetic resin having excellent properties, and is formed into a cylindrical shape having an inner diameter that fits the outer diameter of the expansion / contraction portion 3 when the diameter of the expansion / contraction portion 3 is reduced. As a result, it is possible to expand and contract in the axial direction as a whole.

このスライド部５の他の例として、図示しないが、複数の円筒体の間にスプリングバネなどの弾性体を介装して全体的に軸方向へ伸縮変形可能にしたり、継手本体Ａの外周に円筒体を往復動自在に取り付けてバネなどの弾性体で雌部材１へ向け押圧するように支持することも可能である。 As another example of the slide portion 5, although not shown, an elastic body such as a spring spring is interposed between a plurality of cylindrical bodies so as to be able to expand and contract in the axial direction as a whole, or on the outer periphery of the joint body A. It is also possible to support the cylindrical body so that it can be reciprocated and pressed toward the female member 1 with an elastic body such as a spring.

継手本体Ａに対するスライド部５の取り付け方法としては、予め継手本体Ａの外周面に突起５ｂと凹溝５ｃを形成しておき、この継手本体Ａの外周にスライド部５の内周を挿通した後に、該凹溝５ｃに止め輪などの止め具５ｄを装着することにより、これら突起５ｂと止め具５ｄとでスライド部５が軸方向へ挟み込まれ位置決めするように組み付けている。 As a method of attaching the slide portion 5 to the joint body A, after the protrusion 5b and the groove 5c are formed in advance on the outer peripheral surface of the joint body A and the inner periphery of the slide portion 5 is inserted into the outer periphery of the joint body A, By mounting a stopper 5d such as a retaining ring in the concave groove 5c, the protrusion 5b and the stopper 5d are assembled so that the slide portion 5 is sandwiched and positioned in the axial direction.

また、継手本体Ａ、雄部材２及びニップル６を一体化する場合には、図１（ｂ）及び図３（ａ）に示す如く、これら全体を金属などからなる円筒材料から例えば切削加工などで削り出すか、或いは例えばステンレスなどの変形可能な剛性材料からなる板材をプレス加工やその他の成形加工することで肉厚が薄い円筒体に形成される。 Further, when the joint body A, the male member 2 and the nipple 6 are integrated, as shown in FIGS. 1B and 3A, the whole is made of a cylindrical material made of metal or the like by, for example, cutting. It is formed into a thin cylindrical body by cutting it out or pressing a plate material made of a deformable rigid material such as stainless steel or other molding.

ニップル６の外周面６ａには、周方向へ延びる環状凹部６ｂを軸方向へ複数又は単数形成し、この環状凹部６ｂ内に弾性変形可能な環状シール材６ｃを嵌入して軸方向へ移動不能に保持するとともに、該環状シール材６ｃの外周端を該ニップル６の外周面６ａから突出させて配置している。
その他の例として、図示しないが、環状突起と環状溝を夫々軸方向へ交互に複数ずつ配置される竹の子状に形成することも可能である。 On the outer peripheral surface 6a of the nipple 6, a plurality or a single annular recess 6b extending in the circumferential direction is formed in the axial direction, and an annular seal material 6c that can be elastically deformed is fitted into the annular recess 6b so that it cannot move in the axial direction. While holding, the outer peripheral end of the annular sealing material 6 c is arranged to protrude from the outer peripheral surface 6 a of the nipple 6.
As another example, although not shown, it is also possible to form a plurality of annular protrusions and annular grooves in the shape of a bamboo slab that is alternately arranged in the axial direction.

ニップル６の先端外周には、その外径が管挿入方向へ向けて徐々に大径となるように傾斜するテーパー面６ｄを形成して、導管Ｂを挿入し易くすることが好ましい。 It is preferable to form a tapered surface 6d on the outer periphery of the tip of the nipple 6 so that its outer diameter gradually increases in the tube insertion direction so that the conduit B can be inserted easily.

さらに、雌部材１、拡縮部３及びスリーブ７を一体化する場合には、図１（ｂ）及び図３（ａ）に示す如く、これら全体を例えばポリアセタール樹脂やそれ以外の表面の滑り性と耐熱性に優れた合成樹脂などの弾性変形可能な材料で一体成形し、その開口端から軸方向へ延びる縮径用スリット３ａを周方向へ複数切欠形成して、全体的に径方向へ弾性変形し易くしている。 Further, when the female member 1, the expansion / contraction part 3 and the sleeve 7 are integrated, as shown in FIGS. 1 (b) and 3 (a), the whole is made to have, for example, polyacetal resin or other surface slipperiness. It is integrally molded with an elastically deformable material such as a synthetic resin having excellent heat resistance, and a plurality of diameter-reducing slits 3a extending in the axial direction from the opening end thereof are formed in the circumferential direction so as to be elastically deformed in the overall radial direction. It is easy to do.

このスリーブ７の外周面には、後述する締め付け部材８を位置決めするための凹溝部７ａが凹設され、該締め付け部材８として、図示例の場合には図３（ａ）に示す如く、例えばバネ鋼などの弾性材料を打ち抜き加工などにより帯板状に切り出した後に、円環状に回曲することで縮径する付勢力をもちながら径方向へ弾性変形するように成形される所謂ホースクランプを使用している。 A concave groove portion 7a for positioning a fastening member 8 to be described later is formed in the outer peripheral surface of the sleeve 7, and the fastening member 8 is, for example, a spring as shown in FIG. Uses a so-called hose clamp that is elastically deformed in the radial direction while having an urging force to reduce the diameter by turning into an annular shape after cutting out an elastic material such as steel by punching or the like doing.

このホースクランプ８は、この円環状に回曲されるクランプ本体８ａと、このクランプ本体８ａの両端部を夫々径方向外側へ屈曲して起立させた起立片８ｂとからなり、クランプ本体８ａを、その両端部の起立片８ｂが周方向において交差するように回曲させ、これら起立片８ｂを、例えば工具又は指などにより摘んで相互に接近させることにより、該クランプ本体８ａが拡径し、この拡径状態から弾性力により、該クランプ本体８ａが縮径して起立片８を相互に離隔させる。 The hose clamp 8 includes a clamp body 8a that is bent in an annular shape, and standing pieces 8b that are bent up at both ends of the clamp body 8a radially outward. By turning the upright pieces 8b at both ends so as to intersect in the circumferential direction, and by holding these upright pieces 8b with, for example, a tool or a finger, the clamp body 8a is expanded in diameter, The clamp body 8a is reduced in diameter by an elastic force from the expanded diameter state, and the upright pieces 8 are separated from each other.

このようなホースクランプ８を導管Ｂとして弾性材料からなるチューブやホースの外周に装着した場合には、その弾性的な締め付け力によって変形可能なチューブやホースの周壁が縮径変形するため、継手本体Ａに配管接続する前の状態では、図１（ａ）及び図２（ａ）に示す如く、チューブやホースの開口部Ｂ１内にキャップＣを着脱自在に挿着して潰れ変形しないようにすることが好ましい。 When such a hose clamp 8 is attached to the outer periphery of a tube or hose made of an elastic material as a conduit B, the deformable tube or hose peripheral wall is reduced in diameter by its elastic tightening force, so that the joint body In the state before the pipe connection to A, as shown in FIGS. 1A and 2A, the cap C is detachably inserted into the opening B1 of the tube or hose so as not to be crushed and deformed. It is preferable.

一方、継手本体Ａの軸方向他端に連設される接続具９は、斯かる管継手に接続する他の機器の管接続口の内周面に内ネジ部が刻設される場合には、これと対応する外ネジ部９ａを刻設し、また該管接続口の外周面に外ネジ部が刻設される場合には、これと対応する内ネジ部を刻設している。
図示例の場合には、図３（ａ）に示す如く、この接続具９として外ネジ部９ａが刻設されたナットを、継手本体Ａの管挿入方向側の端部に一体形成している。 On the other hand, when the connecting tool 9 connected to the other axial end of the joint body A is provided with an internal threaded portion on the inner peripheral surface of the pipe connection port of another device connected to the pipe joint. The external screw portion 9a corresponding to this is engraved, and when the external screw portion is engraved on the outer peripheral surface of the pipe connection port, the corresponding internal screw portion is engraved.
In the case of the illustrated example, as shown in FIG. 3A, a nut having an external threaded portion 9a formed as the connection tool 9 is integrally formed at the end of the joint body A on the tube insertion direction side. .

次に、斯かる管継手の管接続方法を工程順に従って説明し、それにより得られる作用効果についても説明する。
先ず、図１（ｂ）及び図２（ｂ）に示す如く、スライド部５が組み付けられた継手本体Ａの雄部材２及びニップル６に対し、締め付け部材８でスリーブ７が組み付けられた導管Ｂの接続端部を差し込むと、図１（ｃ）の実線及び図２（ｃ）に示す如く、該導管Ｂ側のスリーブ７に連設された雌部材１及び拡縮部３の凸状部分１ａが、ニップル６の外周面６ａに突き当たって、雌部材１及び拡縮部３が拡径変形する。 Next, the pipe connection method of such a pipe joint will be described in the order of steps, and the effects obtained thereby will also be described.
First, as shown in FIGS. 1 (b) and 2 (b), the conduit B in which the sleeve 7 is assembled with the fastening member 8 to the male member 2 and the nipple 6 of the joint body A to which the slide portion 5 is assembled. When the connecting end portion is inserted, as shown in the solid line of FIG. 1C and FIG. 2C, the female member 1 connected to the sleeve 7 on the conduit B side and the convex portion 1a of the expansion / contraction portion 3 are The female member 1 and the expansion / contraction part 3 are expanded and deformed by abutting against the outer peripheral surface 6a of the nipple 6.

そのまま導管Ｂを挿入し続けると、図１（ｃ）の二点鎖線に示す如く、拡縮部３の先端がスライド部５に当接し、それ以降は図１（ｄ）の実線に示す如く、この拡縮部３の先端による押圧で該スライド部５が管挿入方向へ圧縮変形する。 If the conduit B is continuously inserted as it is, the tip of the expansion / contraction part 3 comes into contact with the slide part 5 as shown by a two-dot chain line in FIG. 1 (c), and thereafter, as shown by a solid line in FIG. 1 (d). The slide portion 5 is compressed and deformed in the tube insertion direction by the pressing by the tip of the expansion / contraction portion 3.

それにより、ニップル６の外周面６ａ及び環状シール材６ｃが導管Ｂの内周面Ｂ２に当接し、締め付け部材８の締め付け力でスリーブ７を介して導管Ｂの内周面Ｂ２が、ニップル６の外周面６ａ及び環状シール材６ｃに密着し、これら両者間がシールされる。 As a result, the outer peripheral surface 6 a of the nipple 6 and the annular sealing material 6 c come into contact with the inner peripheral surface B 2 of the conduit B, and the inner peripheral surface B 2 of the conduit B passes through the sleeve 7 with the tightening force of the tightening member 8. The outer peripheral surface 6a and the annular sealing material 6c are in close contact with each other, and the space between them is sealed.

そして、雌部材１及び拡縮部３の凸状部分１ａが、図１（ｄ）の一点鎖線に示す如く、継手本体Ａ側の雄部材２の凹状係止部４と対向する位置まで到達すると、図１（ｄ）の実線及び図２（ｄ）に示す如く、該拡縮部３の形状が拡径前の元の形状に戻ろうとして縮径変形し、雄部材２の凹状係止部４と反挿入方向へ係合する。
それにより、これら雌部材１と雄部材２が互いに嵌合して継手本体Ａと導管Ｂが連結し、両者が反挿入方向へ抜け止めされる。 And when the convex part 1a of the female member 1 and the expansion / contraction part 3 reaches | attains the position which opposes the concave-shaped latching | locking part 4 of the male member 2 by the side of the coupling main body A as shown to the dashed-dotted line of FIG.1 (d), As shown in the solid line in FIG. 1D and FIG. 2D, the shape of the expansion / contraction portion 3 is reduced in diameter so as to return to the original shape before the expansion, and the concave engagement portion 4 of the male member 2 Engage in the anti-insertion direction.
Thereby, the female member 1 and the male member 2 are fitted to each other, the joint body A and the conduit B are connected, and both are prevented from coming off in the anti-insertion direction.

これと略同時に、拡縮部３の縮径変形に伴いスライド部５との当接が外れて、該スライド部５の圧縮元が無くなるため、図１（ｅ）及び図２（ｅ）に示す如く、このスライド部５が反挿入方向へ伸張変形して、該スライド部５と雄部材２及び凹状係止部４との間に拡縮部３が径方向へ挟み込まれる。
それにより、拡縮部３が拡径不能となるため、凹状係止部４から外れることはなく、雌部材１からの雄部材２の抜けを確実に防止できる。
しかも、このスライド部５の伸張変形により、雌部材１と雄部材２との接続完了を目視で確認できる。 At substantially the same time, the contact with the slide portion 5 is released as the diameter of the expansion / contraction portion 3 is reduced, and the compression source of the slide portion 5 disappears. Therefore, as shown in FIGS. 1 (e) and 2 (e). The slide portion 5 is stretched and deformed in the anti-insertion direction, and the expansion / contraction portion 3 is sandwiched in the radial direction between the slide portion 5 and the male member 2 and the concave locking portion 4.
Thereby, since the expansion / contraction part 3 becomes impossible to expand the diameter, it does not come off from the concave locking part 4, and the male member 2 can be reliably prevented from coming off from the female member 1.
In addition, the completion of the connection between the female member 1 and the male member 2 can be visually confirmed by the extension deformation of the slide portion 5.

さらに、本実施例では、雌部材１に拡縮部３を配置し、雄部材２の外周面に係止部４を設けるとともにスライド部５を配置したため、流体が通る雄部材２の内周面には突起物がなく平滑に形成可能となって、流体を管内抵抗なしでスムーズに流れるという利点がある。 Furthermore, in this embodiment, the expansion / contraction part 3 is disposed on the female member 1, the locking part 4 is provided on the outer peripheral surface of the male member 2, and the slide part 5 is disposed, so that the fluid is passed through the inner peripheral surface of the male member 2. Has the advantage that it can be formed smoothly without projections and the fluid flows smoothly without resistance in the tube.

また、円筒状のスライド部５に軸方向へ螺旋状に延びる伸縮用スリット５ａを開設して、拡縮部３の当接に伴い該スライド部５全体が軸方向へ圧縮変形するようにしたため、スライド部５を一部品とすることができ、その分だけ部品点数を減らすことができるという利点がある。 In addition, since the slit 5a for expansion and contraction extending spirally in the axial direction is opened in the cylindrical slide portion 5 and the entire slide portion 5 is compressed and deformed in the axial direction in accordance with the contact of the expansion and contraction portion 3, the slide The part 5 can be made into one component, and there is an advantage that the number of components can be reduced accordingly.

またさらに、雄部材２にニップル６を連設し、雌部材１に拡縮部３とスリーブ７を連設して、これらニップル６とスリーブ７との間に導管Ｂを挟み込み、雌部材１、拡縮部３及びスリーブ７に、軸方向へ延びる縮径用スリット３ａを切欠形成したため、縮径用スリット３ａを通して導管Ｂが外部から目視可能となり、導管Ｂの接続状態を目視で確認できるという利点がある。 Furthermore, the nipple 6 is connected to the male member 2, the expansion / contraction part 3 and the sleeve 7 are connected to the female member 1, and the conduit B is sandwiched between the nipple 6 and the sleeve 7, so that the female member 1 Since the diameter-reducing slit 3a extending in the axial direction is notched in the portion 3 and the sleeve 7, the conduit B can be viewed from the outside through the diameter-reducing slit 3a, and the connection state of the conduit B can be visually confirmed. .

この実施例２は、図４〜図６に示す如く、前記継手本体Ａの軸方向他端に接続具７を設けるのに代えて、その軸方向両側に前記雄部材２及び前記係止部４と前記ニップル６を夫々逆向きに一対ずつ設けることにより、２本の導管Ｂを接続する中間継手とした構成が、前記図１〜図３に示した実施例１とは異なり、それ以外の構成は図１〜図３に示した実施例１と同じものである。 In the second embodiment, as shown in FIGS. 4 to 6, instead of providing the connector 7 at the other axial end of the joint body A, the male member 2 and the locking portion 4 are provided on both sides in the axial direction. Unlike the first embodiment shown in FIGS. 1 to 3, the configuration of the intermediate joint for connecting the two conduits B is different from that of the first embodiment shown in FIG. Is the same as that of the first embodiment shown in FIGS.

図示例では、継手本体Ａに対して、これら一対の雄部材２の一部外周及び係止部４を夫々覆うように前記スライド部５が一つだけ軸方向へ往復動自在に設けられ、この一つのスライド部５で、一対の雄部材２及び凹状係止部４との間に一対の拡縮部３を径方向へ夫々挟み込むようにしている。
その他の例として図示しないが、これら一対の雄部材２及び係止部４を夫々覆うようにスライド部５を設けることも可能である。
従って、図４〜図６に示す実施例２も上述した実施例１と同様な作用効果が得られる。 In the illustrated example, only one slide portion 5 is provided on the joint body A so as to reciprocate in the axial direction so as to cover a part of the outer periphery of the pair of male members 2 and the locking portion 4. One slide portion 5 sandwiches the pair of expansion / contraction portions 3 in the radial direction between the pair of male members 2 and the concave locking portion 4.
Although not shown as another example, it is also possible to provide the slide portion 5 so as to cover the pair of male members 2 and the locking portion 4.
Therefore, the second embodiment shown in FIGS. 4 to 6 can obtain the same operational effects as the first embodiment.

なお、前示実施例では、前記継手本体Ａに雄部材２を取り付け、その外周に係止部４を設けるとともに、該雄部材２の一部外周及び係止部４を覆うようにスライド部５が軸方向へ往復動自在に設けられ、また導管Ｂの接続端部の外周に雌部材１を取り付け、この雌部材１の管挿入方向先端に拡縮部３を設けたが、これに限定されず、継手本体Ａに雌部材１を取り付けながら導管Ｂの接続端部に雄部材２を取り付けたり、雄部材２に拡縮部３を設けながら雌部材１に係止部４とスライド部５を設けるなど、これら雌部材１と雄部材２の連結状態で、拡縮部３をスライド部５と係止部４との間に径方向へ挟み込む配置であれば他の構造配置であっても良い。
さらに、前記スリーブ７を導管Ｂの接続端部の外周に挿通して環状の締め付け部材８により軸方向へ移動不能に取り付けたが、これに限定されず、締め付け部材８を用いずに他の固着手段よりスリーブ７を導管Ｂに一体的に取り付けても良く、また締め付け部材８も図示したホースクランプに限定されず、他の周知な形状の締め付け具を使用しても良い。 In the embodiment shown above, the male member 2 is attached to the joint body A, the locking portion 4 is provided on the outer periphery thereof, and the slide portion 5 is provided so as to cover a part of the outer periphery of the male member 2 and the locking portion 4. Is provided so as to be capable of reciprocating in the axial direction, and the female member 1 is attached to the outer periphery of the connecting end portion of the conduit B, and the expanding / contracting portion 3 is provided at the distal end of the female member 1 in the tube insertion direction. The male member 2 is attached to the connection end of the conduit B while the female member 1 is attached to the joint body A, or the locking portion 4 and the slide portion 5 are provided to the female member 1 while the expansion / contraction portion 3 is provided on the male member 2. Any other structural arrangement may be adopted as long as the expansion / contraction portion 3 is sandwiched in the radial direction between the slide portion 5 and the locking portion 4 in the connected state of the female member 1 and the male member 2.
Further, the sleeve 7 is inserted into the outer periphery of the connection end of the conduit B and is attached so as to be immovable in the axial direction by the annular fastening member 8. However, the present invention is not limited to this. The sleeve 7 may be integrally attached to the conduit B by means, and the tightening member 8 is not limited to the illustrated hose clamp, and other well-known tightening tools may be used.

本発明の管継手の一実施例を示す縦断側面図で、（ａ）がキャップの挿着時を示し、（ｂ）が導管の挿入前の状態を示し、（ｃ）が導管の挿入直後の状態を示し、（ｄ）がスライド部の逆移動前の状態を示し、（ｅ）が導管の接続状態を示している。It is a vertical side view which shows one Example of the pipe joint of this invention, (a) shows the time of insertion of a cap, (b) shows the state before insertion of a conduit | pipe, (c) is immediately after insertion of a conduit | pipe. The state is shown, (d) shows the state before the slide part is reversely moved, and (e) shows the connection state of the conduit. 同斜視図で、（ａ）がキャップの挿着時を示し、（ｂ）が導管の挿入前の状態を示し、（ｃ）が導管の挿入直後の状態を示し、（ｄ）がスライド部の逆移動前の状態を示し、（ｅ）が導管の接続状態を示している。In the perspective view, (a) shows when the cap is inserted, (b) shows a state before insertion of the conduit, (c) shows a state immediately after insertion of the conduit, and (d) shows the state of the slide portion. The state before reverse movement is shown, and (e) shows the connection state of the conduit. （ａ）が全体の分解斜視図であり、（ｂ）がスリーブ単体を逆方向から見た斜視図である。(A) is the whole exploded perspective view, (b) is the perspective view which looked at the sleeve simple substance from the reverse direction. 本発明の管継手の他の実施例を示す縦断側面図で、（ａ）が導管の挿入前の状態を示し、（ｂ）が導管の挿入直後の状態を示し、（ｃ）がスライド部の逆移動前の状態を示し、（ｄ）が導管の接続状態を示している。It is a vertical side view which shows the other Example of the pipe joint of this invention, (a) shows the state before insertion of a conduit | pipe, (b) shows the state immediately after insertion of a conduit | pipe, (c) is a slide part. The state before reverse movement is shown, and (d) shows the connection state of the conduit. 同斜視図で、（ａ）が導管の挿入前の状態を示し、（ｂ）が導管の挿入直後の状態を示し、（ｃ）がスライド部の逆移動前の状態を示し、（ｄ）が導管の接続状態を示している。In the perspective view, (a) shows a state before insertion of the conduit, (b) shows a state immediately after the insertion of the conduit, (c) shows a state before the slide portion is reversely moved, (d) shows The connection state of the conduit is shown. 全体の分解斜視図である。It is a whole exploded perspective view.

符号の説明Explanation of symbols

Ａ継手本体１雌部材
１ａ凸状部分２雄部材
３拡縮部３ａ縮径用スリット
４係止部５スライド部
５ａ伸縮用スリット５ｂ突起
５ｃ凹溝５ｄ止め具
６ニップル６ａ外周面
６ｂ環状凹部６ｃ環状シール材
６ｄテーパー面７スリーブ
７ａ凹溝部８締め付け部材
８ａクランプ本体８ｂ起立片
９接続具９ａ外ネジ部
Ｂ導管Ｂ１開口部
Ｂ２内周面Ｃキャップ A Joint body 1 Female member 1a Convex part 2 Male member 3 Expansion / contraction part 3a Diameter reduction slit 4 Locking part 5 Slide part 5a Expansion / contraction slit 5b Projection 5c Concave groove 5d Stopper 6 Nipple 6a Outer peripheral surface 6b Annular recess 6c Annular Sealing material 6d Tapered surface 7 Sleeve 7a Concave groove portion 8 Tightening member 8a Clamp body 8b Standing piece 9 Connection tool 9a External threaded portion B Conduit B1 Opening portion B2 Inner peripheral surface C Cap

Claims

継手本体と、
チューブ，ホース又はパイプからなる導管と、
前記導管に取り付けられる筒状の雌部材と、
前記継手本体に取り付けられて軸方向への挿入により前記雌部材と互いに嵌合する雄部材と、
前記雌部材に設けられて前記雌部材に対する前記雄部材の挿入に伴って径方向へ弾性変形する拡縮部と、
前記雄部材に設けられて前記拡縮部と軸方向へ係合する係止部と、
前記雄部材に前記拡縮部の先端と対向して軸方向へ往復動自在に設けられるスライド部と、
前記雄部材に前記導管の接続端部の内周面と対向するように連設されるニップルと、
前記雌部材に前記導管の接続端部の外周面を覆うように連設されるスリーブと、を備え、
前記スライド部は、筒状に形成されて伸縮用スリットを軸方向へ螺旋状に開設し、前記雌部材に対する前記雄部材の挿入に伴い前記拡縮部と当接して軸方向へ移動し、前記拡縮部と前記係止部の係合に伴い逆移動して、前記スライド部と前記係止部との間に前記拡縮部を径方向へ挟み込むとともに、前記ニップルと前記スリーブとの間に前記導管の接続端部を径方向へ挟み込むことを特徴とする管継手。 The fitting body ;
A conduit consisting of a tube, hose or pipe ;
A tubular female member that is attached to the conduit,
A male member attached to the joint body and fitted into the female member by insertion in the axial direction ;
An expansion / contraction part provided on the female member and elastically deforming in the radial direction along with the insertion of the male member into the female member ;
A locking portion provided on the male member and engaged with the expansion / contraction portion in the axial direction ;
A slide portion that is provided to freely reciprocate in the axial direction to face the front end of the male member to the scaling unit,
A nipple continuously connected to the male member so as to face the inner peripheral surface of the connecting end of the conduit;
A sleeve connected to the female member so as to cover the outer peripheral surface of the connection end of the conduit; and
The sliding portion is formed in a cylindrical shape stretching slit opened in the axial direction in a spiral shape, and the gain related the scaling unit and the contact with the insertion of the male member relative to the female member to move in the axial direction, the scaling parts and inversely moved with the engagement of the locking portion, together with the sandwich radially the scaling unit between the locking portion and the sliding portion, said conduit between said nipple sleeve A pipe joint characterized by sandwiching the connecting end portion in the radial direction .

前記拡縮部及び前記スリーブに、軸方向へ延びる縮径用スリットを切欠形成したことを特徴とする請求項１記載の管継手。 Before Symbol the scaling unit and the sleeve, according to claim 1 Symbol mounting tube joint, characterized in that the notches form a condensed diameter contouring slit extending in the axial direction.

前記導管が弾性材料からなるチューブ，ホースであり、前記導管の外周に、前記スリーブを挟んで締め付け部材が取り付けられ、前記締め付け部材の締め付け力で前記スリーブを縮径変形させることを特徴とする請求項１又は２記載の管継手。The conduit is a tube or a hose made of an elastic material, and a fastening member is attached to an outer periphery of the conduit with the sleeve interposed therebetween, and the sleeve is reduced in diameter by a fastening force of the fastening member. Item 3. A pipe joint according to item 1 or 2.

前記導管の開口部内に着脱自在に挿着されるキャップが備えられることを特徴とする請求項３記載の管継手。The pipe joint according to claim 3, further comprising a cap that is detachably inserted into the opening of the conduit.