JP2642507B2

JP2642507B2 - Pipe fittings

Info

Publication number: JP2642507B2
Application number: JP2271888A
Authority: JP
Inventors: 隆弘横松; 研二三根; 愼一郎加藤
Original assignee: BURIJISUTON FUROOTETSUKU KK
Current assignee: BURIJISUTON FUROOTETSUKU KK
Priority date: 1990-10-08
Filing date: 1990-10-08
Publication date: 1997-08-20
Anticipated expiration: 2012-08-20
Also published as: JPH03249496A

Description

【発明の詳細な説明】（産業上の利用分野）本発明は管継手、例えば、内管、補強層および外被等
の複合構造を有するホースを締結するのに、加締用の機
器、治具等を用いずにワンタッチ式に締結でき、また、
機器と接続するのに接続部品を用いず、かつホースにね
じれの生じない管継手に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a caulking device, a jig for fastening a hose having a composite structure such as a pipe joint, for example, an inner pipe, a reinforcing layer, and a jacket. It can be fastened with one touch without using tools, etc.
The present invention relates to a pipe joint that does not use connecting parts for connecting to equipment and does not cause a hose to be twisted.

（従来の技術及び本発明が解決しようとする課題）一般に、常用圧力30kg/cm²以上の高圧流体の流路に用
いるホースは、内管、補強層および外被等からなる複層
の複合構造を有している。そして、このようなホースの
管継手には、加締タイプのもと非加締タイプのものとが
ある。(Prior art and problems to be solved by the present invention) Generally, a hose used for a flow path of a high-pressure fluid having a normal pressure of 30 kg / cm ² or more has a multi-layered composite structure including an inner pipe, a reinforcing layer, and a jacket. have. Such hose fittings include a caulking type and a non-caulking type.

従来の加締タイプの管継手としては、例えば、第15図
に示すようなものがある。第15図において、１は管継手
であり、管継手１は、芯金具２と芯金具２に取付けられ
た締金具３とを有している。管継手１に内管５、補強層
６および外被７からなるホース８を締結する場合、ホー
ス８は、管継手１の芯金具２の筒状の芯部2aと締金具３
との間に挿入され、ホースメーカー等の工場において、
加締機により加締められる。このため、このような管継
手１は管継手１にホース８を締結するのに専用の加締機
が必要であるばかりでなく、ホース８の長さの調節が必
要になる配管作業の現場において、仕様できないという
問題点がある。As a conventional caulking type pipe joint, for example, there is one as shown in FIG. In FIG. 15, reference numeral 1 denotes a pipe joint, and the pipe joint 1 has a metal core 2 and a clamp 3 attached to the metal core 2. When the hose 8 including the inner pipe 5, the reinforcing layer 6, and the jacket 7 is fastened to the pipe joint 1, the hose 8 is connected to the tubular core 2 a of the core 2 of the pipe joint 1 and the fastener 3.
At a factory such as a hose manufacturer.
It is caulked by a caulking machine. For this reason, such a pipe joint 1 requires not only a special caulking machine to fasten the hose 8 to the pipe joint 1 but also a piping work site where the length of the hose 8 needs to be adjusted. , There is a problem that it cannot be specified.

また、非加締タイプのものとしては、例えば、第16図
に示すようなものがある。第16図において、11は管継手
としてのいわゆるリューザブル金具であり、リューザブ
ル金具11は筒状の芯金具12と、芯金具12の芯部12aの外
周のネジ12bに螺合するフランジ部13aを有する締金具13
とを有している。リューザブル金具11に複合構造のホー
ス８を締結する場合、まず、バイス等を用いて締金具13
をホース８に取り付けておき、次に芯金具12の芯部12a
をスパナ等でホース８の内側にねじ込んでいき、ホース
との締結を完了するものである。しかしながら、このも
のは、締結の際にバイスやスパナ等の締付金具が必要で
あるとともに、締結に時間がかかり、作業効率が悪いと
いう問題点がある。As a non-crimping type, for example, there is a type as shown in FIG. In FIG. 16, reference numeral 11 denotes a so-called reversible metal fitting as a pipe joint, and the reusable metal fitting 11 has a cylindrical core metal part 12, and a flange part 13a screwed to a screw 12b on an outer periphery of a core part 12a of the core metal part 12. Fastener 13
And When the composite structure hose 8 is fastened to the reusable metal fitting 11, first, the fastener 13 is fastened using a vise or the like.
Is attached to the hose 8, and then the core 12a of the core fitting 12 is attached.
Is screwed into the hose 8 with a spanner or the like to complete the fastening with the hose. However, this method requires a fastener such as a vise or a spanner at the time of fastening, and requires a long time for fastening, resulting in poor working efficiency.

また、ワンタッチ管継手としては、例えば第17図に示
すように、実開昭55−98888号公報、実公昭61−4796号
公報等で提案されたものがある。第17図に示すワンタッ
チ管継手15は、管状の継手本体16と継手本体16内に挿入
された単層のチューブ17と外接するシール部材としての
Ｏリング18と、チューブ17の外側に喰い付くチャック19
を有している。そして、チューブ17内の流体のシールは
チューブ17の外側からＯリング18が圧接することにより
行っている。このため、これら公知のワンタッチ管継手
に複合構造のホースを締結すると、ホースの補強層が繊
維を編組みした空隙の存在する層であるため、ホース内
の流体がホースの端部から補強層内に進入してホースに
膨れを生じさせたり、または流体の漏れを生ずる等の不
具合を発生する。また、チャック19によるチューブ17の
把持がチューブ17の外側を鋭利な爪状部19aによりほと
んど軸方向長さを持たない先端部で行っている。この
め、このようなワンタッチ管継手15はホースの外被を破
ったり、ホースの抜け等の不具合を発生し、複合構造の
ホースには適用できないという問題がある。更に、チュ
ーブ自体の耐圧力が低いこと、該ワンタッチ管継手15が
主に常用圧力20kg/cm²以下の単層構造のチューブ用に設
計されていること等の理由により、常用圧力が30kg/cm²
を越えるような高圧仕様には耐えられないものであっ
た。As one-touch fittings, for example, as shown in FIG. 17, there are those proposed in Japanese Utility Model Laid-Open No. 55-98888 and Japanese Utility Model First Publication No. 61-4796. The one-touch fitting 15 shown in FIG. 17 includes an O-ring 18 as a sealing member that circumscribes a tubular joint body 16 and a single-layer tube 17 inserted into the joint body 16, and a chuck that bites outside the tube 17. 19
have. The sealing of the fluid in the tube 17 is performed by pressing the O-ring 18 from outside the tube 17. For this reason, when a hose having a composite structure is fastened to these known one-touch fittings, since the reinforcing layer of the hose is a layer having a gap formed by braiding fibers, the fluid in the hose flows from the end of the hose into the reinforcing layer. , Causing swelling of the hose or leakage of fluid. Further, the gripping of the tube 17 by the chuck 19 is performed outside the tube 17 by a sharp claw 19a at a tip portion having almost no axial length. For this reason, such a one-touch fitting 15 has a problem that it breaks the outer jacket of the hose, causes the hose to come off, and the like, and cannot be applied to a hose having a composite structure. Furthermore, pressure resistance of the tube itself is low, because, for example to the one-touch fitting 15 is designed for tube mainly conventional pressure 20 kg / cm ² or less of the single-layer structure, conventional pressure 30kg / cm ^Two
It could not withstand high pressure specifications that exceeded

また、実公昭58−17193号公報に提案されたものがあ
る。これは、内圧により摺動する摺動管の軸方向力によ
って、チューブの内側に位置する膨出部とチューブの外
側に位置する爪がチューブを圧縮して係合する構造であ
る。しかしながら、係合部材がほとんど軸方向長さをを
持たないため、流体の繰り返し衝撃圧力が30kg/cm²以上
を越えるような場合には、繰り返し応力が係合部分に集
中し、遂にはホースの外被破れやホースの抜け等の不具
合を生じ易いという問題点がある。Also, there is one proposed in Japanese Utility Model Publication No. 58-17193. This is a structure in which a bulge located inside the tube and a claw located outside the tube compress and engage the tube by the axial force of the sliding tube that slides due to the internal pressure. However, since the engaging member has almost no axial length, when the repetitive impact pressure of the fluid exceeds 30 kg / cm ² or more, the repetitive stress concentrates on the engaging portion, and finally the hose There is a problem that defects such as tearing of the sheath and detachment of the hose are likely to occur.

また、機器の圧力配管等で、ホースの外傷等によりホ
ースの一部分のみを補修する場合には、まず補修部分を
切り、残った２ケ所にホースの口金具を加締等により取
り付けてから各々の接続する必要があった。ところが加
締等により口金具を取り付けるには、機器から一度ホー
ス配管をはずさなければならず、また、口金具を取り付
け後、再び配管し直す必要があり非常に手間がかかると
いう問題があった。また、新品ホースの場合、製造可能
な長さを越えた長さのホースが必要なとき、ホースは荷
扱い上およびメンテナンス上でホースの長さが制限され
るので、中間の接続継手が必要になるという問題点があ
る。If only a part of the hose is to be repaired due to damage to the hose with the pressure piping of the equipment, cut the repaired part first, attach the hose fittings to the remaining two places by crimping, etc. Had to connect. However, in order to attach the fitting by caulking or the like, there is a problem that it is necessary to remove the hose pipe from the device once, and after attaching the fitting, it is necessary to reconnect the piping, which is extremely troublesome. Also, in the case of a new hose, when a hose longer than the manufacturable length is required, the length of the hose is limited for handling and maintenance, so an intermediate connection joint is required. There is a problem that becomes.

また、従来、機器の高圧配管等において、機器にホー
スを接続しようとする場合、ホースの両端に管継手とし
ての加締金具が加締め固着されているホース組立体を用
いる。このとき、ホースにねじれが加わらない様にする
ため、第18図（ａ）に示す様に、ホース組立体130は少
なくとも一端に加締金具131、他端にユニオンナット付
の加締金具132を有するものを用いる。まず、加締金具1
31はホース組立体130を回転させながら機器Ａにねじ込
み接続し、そして他端の加締金具132のユニオンナット1
33を予め、機器Ｂに接続しておいたアダプター134に接
続する。または、第18図（ｂ）に示す様に、ホース組立
体130Aは両端に雄ねじ付の加締金具131を用い、接続ア
ダプターとしてユニオンナット付のアダプター135を用
いて機器ＡおよびＢに接続する。いずれの場合にも、ホ
ース組立体以外に余分の金具類であるユニオンナット、
およびアダプター等が必要となる。さらに、ユニオンナ
ット133を締付ける際、第18図（ｃ）に示すように、共
回りによるホースのねじれを防止するため、ユニオンナ
ット付の加締金具132の固定ナット132Aをスパナ等で固
定しておいて、ユニオンナット133を回転締付けなけれ
ばならず、締付けに手間がかかるという問題点もある。Conventionally, when connecting a hose to a device in a high-pressure pipe or the like of the device, a hose assembly having a crimping fitting as a pipe joint fixed to both ends of the hose is used. At this time, in order to prevent the hose from being twisted, as shown in FIG. 18 (a), the hose assembly 130 has a crimp fitting 131 at least at one end and a crimp fitting 132 with a union nut at the other end. Use what you have. First, caulking bracket 1
Reference numeral 31 denotes a screw connection to the device A while rotating the hose assembly 130, and a union nut 1 of the crimping fitting 132 at the other end.
33 is connected to the adapter 134 previously connected to the device B. Alternatively, as shown in FIG. 18 (b), the hose assembly 130A is connected to the devices A and B by using a crimping fitting 131 having male threads at both ends and using an adapter 135 having a union nut as a connection adapter. In any case, union nuts that are extra fittings other than the hose assembly,
And an adapter etc. are required. Further, when tightening the union nut 133, as shown in FIG. 18 (c), in order to prevent the hose from twisting due to co-rotation, fix the fixing nut 132A of the crimping fitting 132 with the union nut with a spanner or the like. In this case, the union nut 133 has to be rotationally tightened, and there is a problem that the tightening is troublesome.

そこで本発明は、第１筒部材の大径孔部の内壁に摺動
するフランジ部および軸孔を有する軸部を有する第２筒
部材と、第１筒部材の大径孔部の内側に傾斜面部を有す
るスリーブおよび該傾斜面部に接触して軸方向にスリー
ブに接近させることにより縮径するコレットを設けるこ
とにより、軸部とコレットとの間に挿入されたホースを
コレットが縮径してホースにくい込むようにし、高圧の
流体に用いる複合構造のホースを加締用の機器、治具等
を用いずホースを管継手に挿入する一動作で、いわゆる
ワンタッチで管継手に締結できることを目的とし、ま
た、ホースとホースとを締結するのに、前述のように、
ホースを管継手内に挿入するのみで、ワンタッチで簡単
に締結できるとともに、この締結部分の長さを短くする
ことを目的とし、さらにまた、機器にホースを接続し、
配管する際、ホースにねじれを与えず接続でき、また機
器の可動部に接続し、ホースにねじれが起こっても、加
圧負荷時にホースの回転が自在でねじれの解消のできる
管継手を提供することを目的とする。Therefore, the present invention provides a second cylindrical member having a flange portion and a shaft portion having a shaft hole that slides on the inner wall of the large-diameter hole portion of the first cylindrical member, and a tilted inside of the large-diameter hole portion of the first cylindrical member. By providing a sleeve having a surface portion and a collet that is reduced in diameter by coming into contact with the inclined surface portion and approaching the sleeve in the axial direction, the hose inserted between the shaft portion and the collet is reduced in diameter by the collet, and a hose is formed. One operation of inserting a hose into a pipe joint without using a caulking device, jig, etc., with a composite structure hose used for high-pressure fluid so that it can be inserted into the pipe joint, so that it can be fastened to the pipe joint with one touch, Also, when connecting the hose to the hose, as described above,
Just by inserting the hose into the fitting, it can be easily fastened with one touch, and the purpose is to shorten the length of this fastening part, and also connect the hose to the equipment,
Provide a pipe joint which can be connected without giving a twist to a hose when piping, and which can be connected to a movable part of a device and which can be freely rotated at the time of pressurizing load even if the hose is twisted, thereby eliminating the twist. The purpose is to:

（課題を解決するための手段）本願の請求項１記載の発明は、繊維部材からなる空隙
を有する補強層を備えた複合構造のホースを接続する管
継手であって、小径孔部および小径孔部に連なる小径孔
部より孔径の大きい大径孔部を有する第１筒部材と、第
１筒部材の大径孔部と軸方向で摺動するフランジ部およ
びフランジ部に連なり小径孔部に連通する軸孔を有する
軸部を有する第２筒部材と、第１筒部材の大径孔部と第
２筒部材のフランジ部との間をシールする第１シール部
材と、第２筒部材の軸部の外周に設けた第２シール部材
と、第２筒部材との間に前記大径孔部側から小径孔部側
に向かってホースを挿入することができるよう大径孔部
内に設けられ、軸方向に摺動するとき拡縮径可能なコレ
ットと、大径孔部内に設けられ、前記第２筒部材が前記
フランジ部に作用する流体圧によって軸方向に移動する
とき該第２筒部材と協働して前記コレットを内方に加圧
し、前記コレットを縮径させるスリーブと、を備え、前
記大径孔部側から小径孔部側に向かって前記第２筒部材
の軸部と前記コレットとの間にホースを挿入した状態
で、前記フランジ部に加わる流体圧により前記第２筒部
材を軸方向に移動させ、前記ホースを前記コレット、ス
リーブおよび第２筒部材により緊締するようにしたこと
を特徴とするものであり、請求項２記載の発明のように、繊維部材からなる空隙
を有する補強層を備えた複合構造のホースを接続する管
継手であって、小径孔部および小径孔部に連なる小径孔
部より孔径の大きい大径孔部を有するとともに、該大径
孔部の内周面の直径が小径孔部側から大径孔部側に向か
って減少する傾斜面部が設けられた第１筒部材と、第１
筒部材の大径孔部と軸方向で摺動するフランジ部および
フランジ部に連なり小径孔部に連通する軸孔を有する軸
部を備えた第２筒部材と、第１筒部材の大径孔部と第２
筒部材のフランジ部との間をシールする第１シール部材
と、第２筒部材の軸部の外周に設けた第２シール部材
と、第２筒部材との間に前記大径孔部側から小径孔部側
に向かってホースを挿入することができるよう大径孔部
内に設けられ、前記第２筒部材と連動して前記傾斜面部
内を軸方向に移動するとき縮径する筒状のコレットと、
を備え、前記大径孔部側から小径孔部側に向かって前記
第２筒部材の軸部と前記コレットとの間にホースを挿入
した状態で、前記フランジ部に加わる流体圧により前記
第２筒部材およびコレットを軸方向に移動させ、前記ホ
ースを前記コレットおよび第２筒部材により緊締するよ
うにしたことを特徴とするもの、あるいは、請求項４記載の発明のように、繊維部材か
らなる空隙を有する補強層を備えた複合構造のホースを
接続する管継手であって、小径孔部および小径孔部に連
なる小径孔部より孔径の大きい大径孔部を有する第１筒
部材と、第１筒部材の大径孔部と軸方向で摺動するフラ
ンジ部およびフランジ部に連なり小径孔部に連通する軸
孔を有する軸部を備えた第２筒部材と、第１筒部材の大
径孔部と第２筒部材のフランジ部との間をシールする第
１シール部材と、第２筒部材の軸部の外周に設けた第２
シール部材と、前記大径孔部側から前記小径孔部側に向
かって直径が減少するよう傾斜した外周面部および複数
の凸部が形成された内周面部を有し、第２筒部材との間
に前記大径孔部側から小径孔部側に向かってホースを挿
入することができるよう大径孔部内に設けられるととも
に、前記第１筒部材により前記大径孔部の軸方向への移
動を規制されたコレットと、前記大径孔部側から前記小
径孔部側に向かって直径が減少するとともにコレットの
外周面部に当接可能な内周面部を有し、前記第２筒部材
のフランジ部に当接し前記第２筒部材と連動して軸方向
に移動するとき、前記コレットの外周面部を内方に加圧
して前記コレットを縮径させるスリーブと、を備え、前
記大径孔部側から前記小径孔部側に向かって前記第２筒
部材の軸部と前記コレットとの間にホースを挿入した状
態で、前記フランジ部に加わる流体圧により前記第２筒
部材およびスリーブを軸方向に移動させ、前記ホースを
前記コレット、スリーブおよび第２筒部材により緊締す
るようにしたことを特徴とするものである。(Means for Solving the Problems) The invention according to claim 1 of the present application is a pipe joint for connecting a hose having a composite structure provided with a reinforcing layer having a void made of a fiber member, wherein the small-diameter hole portion and the small-diameter hole are provided. A first cylindrical member having a large-diameter hole portion having a larger diameter than the small-diameter hole portion connected to the portion, a flange portion sliding in the axial direction with the large-diameter hole portion of the first cylindrical member, and communicating with the flange portion to communicate with the small-diameter hole portion; A second cylindrical member having a shaft portion having a shaft hole to be formed, a first seal member for sealing between a large diameter hole portion of the first cylindrical member and a flange portion of the second cylindrical member, and a shaft of the second cylindrical member. A second seal member provided on the outer periphery of the portion, provided in the large diameter hole so that a hose can be inserted from the large diameter hole side toward the small diameter hole side between the second cylindrical member, A collet capable of expanding and contracting when sliding in the axial direction; and a second cylinder provided in a large-diameter hole. A sleeve for compressing the collet inwardly in cooperation with the second tubular member when the member moves in the axial direction by fluid pressure acting on the flange portion to reduce the diameter of the collet; In a state where a hose is inserted between the shaft portion of the second cylindrical member and the collet from the diameter hole side toward the small diameter hole side, the second cylinder member is axially moved by the fluid pressure applied to the flange portion. And the hose is tightened by the collet, the sleeve, and the second tubular member. The reinforcing layer having a void made of a fiber member as in the invention of claim 2. A pipe joint for connecting a hose having a composite structure having a large-diameter hole having a larger diameter than the small-diameter hole and the small-diameter hole connected to the small-diameter hole, and an inner peripheral surface of the large-diameter hole. Large diameter from small hole side A first cylindrical member provided with an inclined surface portion decreasing toward the radial hole portion side;
A second cylindrical member having a flange portion sliding in the axial direction with the large-diameter hole portion of the cylindrical member and a shaft portion having a shaft hole connected to the flange portion and communicating with the small-diameter hole portion; and a large-diameter hole of the first cylindrical member. Part and second
A first seal member for sealing between a flange portion of a cylindrical member, a second seal member provided on an outer periphery of a shaft portion of a second cylindrical member, and a second cylindrical member between the large-diameter hole portion and the second cylindrical member; A cylindrical collet that is provided in the large-diameter hole so that the hose can be inserted toward the small-diameter hole, and that reduces its diameter when moving in the inclined direction in the axial direction in conjunction with the second cylindrical member. When,
The hose is inserted between the shaft portion of the second cylindrical member and the collet from the large-diameter hole side toward the small-diameter hole side, and the second pressure is applied to the second flange by the fluid pressure applied to the flange portion. The tube member and the collet are moved in the axial direction, and the hose is tightened by the collet and the second tube member. Alternatively, the hose is made of a fiber member as in the invention of claim 4. A first tubular member having a small-diameter hole and a large-diameter hole having a larger diameter than the small-diameter hole connected to the small-diameter hole; A second cylindrical member having a flange portion sliding in the axial direction with the large-diameter hole portion of the one cylindrical member and a shaft portion having a shaft hole connected to the flange portion and communicating with the small-diameter hole portion; Between the hole and the flange of the second cylindrical member. A first sealing member for sealing, and a second sealing member provided on an outer periphery of a shaft portion of the second cylindrical member.
A sealing member having an outer peripheral surface portion inclined so as to decrease in diameter from the large-diameter hole portion side toward the small-diameter hole portion side and an inner peripheral surface portion formed with a plurality of protrusions, and The large-diameter hole portion is provided in the large-diameter hole portion so that a hose can be inserted from the large-diameter hole portion side toward the small-diameter hole portion, and the first cylindrical member moves the large-diameter hole portion in the axial direction. A collet whose diameter is reduced from the large-diameter hole side toward the small-diameter hole side and an inner peripheral surface portion that can contact an outer peripheral surface portion of the collet; and a flange of the second cylindrical member. A sleeve that presses an outer peripheral surface of the collet inwardly to reduce the diameter of the collet when the collet moves in the axial direction in contact with the second cylindrical member, and the large-diameter hole side From the shaft portion of the second cylindrical member toward the small-diameter hole portion side and With the hose inserted between the collet, the second cylinder member and the sleeve are axially moved by fluid pressure applied to the flange portion, and the hose is tightened by the collet, the sleeve and the second cylinder member. It is characterized by having made it.

またコレットの材質はスチール、アルミニウム等の金
属、ポリアセタール、ナイロン等の合成樹脂、または、
ホースを圧縮、加締める荷重下において、また、使用時
の内圧力により負荷がかかった状態において、その形状
を保つことができる強度をもつものであればよい。ま
た、コレットは縮径作用を確実にするため、軸線方向に
スリットを介在させるのが好ましく、さらに好ましくは
ホース外周面と当接するコレット内周面に、ホースの締
結、保持性能を向上するためのリング状や螺子状の溝を
形成する。The material of the collet is steel, metal such as aluminum, polyacetal, synthetic resin such as nylon, or
It is sufficient that the hose has a strength capable of maintaining its shape under a load for compressing and crimping the hose and under a load applied by internal pressure during use. Further, the collet is preferably provided with a slit in the axial direction in order to ensure the diameter-reducing action, and more preferably on the inner peripheral surface of the collet which is in contact with the outer peripheral surface of the hose, for improving the fastening and holding performance of the hose. A ring-shaped or screw-shaped groove is formed.

（作用）本願の発明においては、ホースの端部が、第１筒部材
の大径孔部側から小径孔部側に向って第２筒部材のフラ
ンジ部に当接するまで前記軸部と前記コレットとの間に
挿入され、ホースと管継手とは係合する。次いで、内圧
が負荷されると、第２筒部材のフランジ部が流体の内圧
により大径孔部の内壁を軸方向に摺動して移動する。コ
レットは第２筒部材の移動とともにその外周面をスリッ
プの傾斜面部に内接しながらスリーブに近づくように移
動する。このとき、コレットは縮径しながら、かつ、コ
レットの筒状の内周部はホースの外周部にくい込みホー
ス端部と管継手とは強固に締結する。すなわち、ホース
と管継手との締結は加締用の機器、治具等を用いること
なく、流体の内圧によりワンタッチに完了する。(Operation) In the invention of the present application, the shaft portion and the collet are connected until the end of the hose comes into contact with the flange portion of the second cylindrical member from the large-diameter hole side of the first cylindrical member toward the small-diameter hole side. And the hose and the fitting engage. Next, when an internal pressure is applied, the flange portion of the second cylindrical member slides and moves on the inner wall of the large-diameter hole portion in the axial direction due to the internal pressure of the fluid. The collet moves so as to approach the sleeve while the outer peripheral surface is inscribed in the inclined surface of the slip as the second cylindrical member moves. At this time, the diameter of the collet is reduced, and the cylindrical inner peripheral portion of the collet is hardly engaged with the outer peripheral portion of the hose. That is, the fastening between the hose and the pipe joint is completed in one touch by the internal pressure of the fluid without using any caulking equipment, jigs, or the like.

また、前述のホースと管継手とが係合した状態におい
ては、ホースは第２筒部材の軸部とコレット間に挿入さ
れ、第２筒部材に圧接しているだけであり、かつ、第２
筒部材はシール部材により第１筒部材と摺動可能である
ので、ホースは第２筒部材とともに第１筒部材に対して
回転可能である。このため、ホースと管継手を係合した
状態でホースをねじることなく、管継手の第１筒部材を
回転して第１筒部材のねじ部を機器の接続部にねじ込み
接続可能である。When the hose and the pipe joint are engaged with each other, the hose is inserted between the shaft portion of the second tubular member and the collet, and only presses against the second tubular member.
Since the tubular member is slidable with the first tubular member by the seal member, the hose is rotatable with respect to the first tubular member together with the second tubular member. For this reason, without twisting the hose in a state where the hose and the pipe joint are engaged, the first tubular member of the pipe joint can be rotated and the threaded portion of the first tubular member can be screwed and connected to the connection part of the device.

また、内圧が負荷されると、前述の様にホースと管継
手は締結されるが、再び内圧を無負荷にすると、スリー
ブの外径は第１筒部材の大径孔部の内径より小さいの
で、ホースはスリーブとともに第１筒部材に対して回転
可能である。このため、ホースと管継手を締結後にも、
内圧を無負荷にすると、管継手の大径孔部は、ホースを
ねじることなく、また、アダプター、ユニオンナット等
を使用する必要なく、機器の接続部にねじ込み可能であ
る。When the internal pressure is applied, the hose and the pipe joint are fastened as described above. However, when the internal pressure is reduced again, the outer diameter of the sleeve is smaller than the inner diameter of the large-diameter hole of the first cylindrical member. The hose is rotatable with respect to the first tubular member together with the sleeve. For this reason, even after connecting the hose and the pipe joint,
When the internal pressure is set to no load, the large-diameter hole of the pipe joint can be screwed into the connection portion of the device without twisting the hose and without using an adapter, a union nut, or the like.

請求項３、４記載の発明では、第１筒部材によってス
リーブ又はコレットの軸方向移動が規制されるものの、
その回転を可能とすることで、内圧が負荷されている時
にも、ホースは周方向に回転自在となりホースをねじる
ことなく、機器の可動部に使用できる。According to the third and fourth aspects of the present invention, the axial movement of the sleeve or the collet is restricted by the first cylindrical member.
By enabling the rotation, the hose is rotatable in the circumferential direction even when the internal pressure is applied, and can be used for the movable part of the device without twisting the hose.

（実施例）以下、本願の第１発明の実施例を図面に基づいて説明
する。(Example) Hereinafter, an example of the first invention of the present application will be described with reference to the drawings.

第１〜４図は本願の第１発明に係る第１実施例を示す
図である。1 to 4 show a first embodiment according to the first invention of the present application.

まず、構成について説明する。第１図において、21は
管継手であり、管継手21は、軸方向に小径孔を有する小
径孔部22aおよび小径孔部22aに連なり、小径孔部22aよ
り孔径の大きい大径孔部22bを有する第１筒部材として
の継手本体22と、継手本体22の大径孔部22b内で軸方向
に摺動するフランジ部24aおよびフランジ部24aに連な
り、小径孔部22aに連通する軸孔24bを有する軸部24cを
備えた第２筒部材としての芯部材24とを備えている。継
手本体22の大径孔部22b内で小径孔部22aから遠い開口22
c側にスリーブ26が設けられている。スリーブ26はその
外周面26aを継手本体22の大径孔部22bの内壁22dに接
し、段差部22eと開口22c近傍の周溝22fに係合する係止
部材としての止めリング27により固定されている。スリ
ーブ26の内周面はその直径が軸方向開口22c側に向って
減少するよう傾斜した傾斜面部26cを有している。28は
コレットであり、筒状のコレット28はスチールからなり
継手本体22の大径孔部22b内でスリーブ26の傾斜面部26c
に接触する円錐状の外周面28aを有している。コレット2
8の内面には、複数の凹凸のリング状の周溝28bが設けら
れ、コレット28がスリーブ26内で軸方向に摺動するとき
拡縮径可能である。コレット28は、第３、４図に示すよ
うに、周上に、複数の軸方向スリット28cが設けられ、
後述のホースの圧縮、加締める荷重下においてもその形
状を保持できるとともに、縮径が確実にできるようなさ
れている。29はＯリング（第１シール部材）であり、Ｏ
リング29は芯部材24のフランジ部24aの外周部に設けら
れ、継手本体22と芯部材24のフランジ部24aとをシール
する。30はＯリング（第２シール部材）であり、Ｏリン
グ30は芯部材24の軸部24cの外周部で、コレット28の周
溝28bと対向する位置に設けられ、挿入されたホースの
内管と密着して内管と軸部24cとの間を封止するように
なされている。First, the configuration will be described. In FIG. 1, reference numeral 21 denotes a pipe joint. The pipe joint 21 is connected to a small-diameter hole 22a having a small-diameter hole in the axial direction and a large-diameter hole 22b having a larger diameter than the small-diameter hole 22a. A joint main body 22 as a first cylindrical member having, a flange 24a sliding in the axial direction within the large-diameter hole 22b of the joint main body 22 and a shaft hole 24b communicating with the flange 24a and communicating with the small-diameter hole 22a. And a core member 24 as a second cylindrical member having the shaft portion 24c. The opening 22 far from the small-diameter hole 22a in the large-diameter hole 22b of the joint body 22
A sleeve 26 is provided on the c side. The sleeve 26 has its outer peripheral surface 26a in contact with the inner wall 22d of the large-diameter hole portion 22b of the joint body 22, and is fixed by a stop ring 27 as a locking member engaged with the step 22e and the peripheral groove 22f near the opening 22c. I have. The inner peripheral surface of the sleeve 26 has an inclined surface portion 26c that is inclined such that its diameter decreases toward the axial opening 22c. Numeral 28 is a collet, and the cylindrical collet 28 is made of steel and has an inclined surface 26c of a sleeve 26 in a large-diameter hole 22b of the joint body 22.
And has a conical outer peripheral surface 28a that comes into contact with the outer peripheral surface 28a. Collet 2
The inner surface of 8 is provided with a plurality of ring-shaped peripheral grooves 28b having irregularities so that the diameter of the collet 28 can be enlarged and reduced when the collet 28 slides in the sleeve 26 in the axial direction. As shown in FIGS. 3 and 4, the collet 28 is provided with a plurality of axial slits 28c on its periphery.
The shape of the hose can be maintained even under a load for compressing and caulking the hose, which will be described later, and the diameter can be reliably reduced. 29 is an O-ring (first sealing member);
The ring 29 is provided on the outer peripheral portion of the flange portion 24a of the core member 24, and seals the joint body 22 and the flange portion 24a of the core member 24. Reference numeral 30 denotes an O-ring (second sealing member). The O-ring 30 is provided at a position facing the circumferential groove 28b of the collet 28 at an outer peripheral portion of the shaft portion 24c of the core member 24, and is provided with an inner pipe of the inserted hose. To tightly seal the space between the inner tube and the shaft portion 24c.

このような管継手21を組立てる際、芯部材24のフラン
ジ部24aの外周溝にＯリング29を入れ、芯部材24の軸部2
4cの外周部にＯリング30を入れる。そして、芯部材24は
継手本体22の開口22c側から芯部材24のフランジ部24aが
小径孔部22aに当接するまで挿入し、さらにコレット28
を芯部材24のフランジ部24aに当接するまで挿入する。
その後、コレット28の外周面に接触するようスリーブ26
を継手本体22の内側に挿入し段差部22eと止めリング27
により固定する。When assembling such a pipe joint 21, an O-ring 29 is inserted into the outer peripheral groove of the flange portion 24a of the core member 24, and the shaft portion 2 of the core member 24 is inserted.
Insert the O-ring 30 into the outer periphery of 4c. The core member 24 is inserted from the opening 22c side of the joint body 22 until the flange portion 24a of the core member 24 contacts the small-diameter hole portion 22a.
Is inserted until it comes into contact with the flange portion 24a of the core member 24.
Thereafter, the sleeve 26 is brought into contact with the outer peripheral surface of the collet 28.
Into the inside of the joint body 22, and insert the step 22e and the retaining ring 27
Fix with.

ホース31は、第２図に示すように、内径D₃₁が9.5mmの
複合構造の高圧ホースであり、材質は内管32がナイロン
樹脂、補強層33がポリエステル繊維の１層編み構造、外
皮34がポリウレタンである。ホース31の端部31aは、第
２図（ａ）に示すように、継手本体22の大径孔部22b側
から小径孔部22a側に向って芯部材24の軸部24cとコレッ
ト28との間にフランジ部24aに当接するまで挿入され
る。As shown in FIG. 2, the hose 31 is a composite high-pressure hose having an inner diameter D ₃₁ of 9.5 mm. The material of the hose ₃₁ is a one-layer knitted structure of nylon resin for the inner tube 32, a polyester fiber for the reinforcing layer 33, and an outer sheath 34. Is polyurethane. As shown in FIG. 2 (a), the end 31a of the hose 31 is formed between the shaft 24c of the core member 24 and the collet 28 from the large-diameter hole 22b side of the joint main body 22 to the small-diameter hole 22a. It is inserted until it comes into contact with the flange portion 24a.

次いで、管継手21内に内圧が加わると、小径孔部22a
内の内圧により芯部材24はスリーブ26に接近するよう軸
方向に移動させられ、コレット28が芯部材24に係合して
芯部材24と一緒に移動すると、コレット28はこの外周面
28aがスリーブ26内でスリーブ26の傾斜面部26cに接触し
て軸方向に摺動しながら縮径する。そして、コレット28
と軸部24cとによりホース31の端部31aは緊締される。こ
のように、芯部材24がそのフランジ部24aに作用する流
体圧によって移動するとき、この芯部材24とスリーブ26
とが協働してコレット28を内方に加圧せしめることで、
大径孔部22b側から小径孔部22a側に向かって芯部材24の
軸部24cとコレット28との間に挿入された複合構造ホー
ス31を、前記コレット28、スリーブ26および芯部材24に
より緊締するようになっている。Next, when an internal pressure is applied to the pipe joint 21, the small-diameter hole 22a
The core member 24 is moved in the axial direction by the internal pressure so as to approach the sleeve 26. When the collet 28 engages with the core member 24 and moves together with the core member 24, the collet 28
28a contacts the inclined surface portion 26c of the sleeve 26 in the sleeve 26 and contracts while sliding in the axial direction. And collet 28
The shaft 31c tightens the end 31a of the hose 31. Thus, when the core member 24 moves by the fluid pressure acting on the flange portion 24a, the core member 24 and the sleeve 26 move.
And collaborate to press the collet 28 inward,
The composite structure hose 31 inserted between the shaft portion 24c of the core member 24 and the collet 28 from the large-diameter hole portion 22b side toward the small-diameter hole portion 22a side is tightened by the collet 28, the sleeve 26, and the core member 24. It is supposed to.

次に、作用について説明する。 Next, the operation will be described.

ホース31の端部31aが第２図（ａ）に示すように、継
手本体22の大径孔部22b側から小径孔部22a側に向って芯
部材24のフランジ部24aに当接するまで軸部24cとコレッ
ト28との間に挿入されホース31と管継手21とは係合す
る。ホース31の内面31bは軸部24c上のＯリング30に接触
して密封し、管継手21内の内圧が無圧力下および極低圧
下である場合でも、流体の漏洩はない。本発明の管継手
21は継手本体22の大径孔部22b内にスリーブ26およびコ
レット28を有しているので、管継手21に内圧が加わる
と、小径孔部22a内の内圧により、芯部材24のフランジ
部24aがスリーブ26に接近するよう軸方向に移動すると
ともに、コレット28が芯部材24に係合して芯部材24と一
緒に移動する。そして、コレット28の外周面28aは、第
２図（ｂ）に示すように、スリーブ26の傾斜面部26cに
接触してスリーブ26内で軸方向に摺動する。このとき、
コレット28はスリット28cの間隙が小さくなり、縮径す
るとともに、コレット28の凹凸状の複数の周溝28bはホ
ース31の外皮34の外周面に広い周面でくい込む。そし
て、ホース31は十分に加締められつつ開口22c側に移動
し、ホース31と管継手21とは十分に緊締され、ホース31
内の流体は漏洩することはない。また、スリーブ26は傾
斜面部26cの最大径部26dの直径が芯部材24のフランジ部
24aの外径より小さいので、所定の内圧において、フラ
ンジ部24が最大径部26dに係止される。このため、ホー
ス31はコレット28と芯部材24により過剰に加締められる
ことがなくなり、外皮34等の外傷の発生が防止され、補
強層切れも防止される。ホース31は管継手21の小孔径部
22a内の内圧によってのみ加締められ管継手21にワンタ
ッチ式に緊締される。したがって、加締用の機器および
治具等を必要とせず、緊締作業が極めて容易にできる。As shown in FIG. 2 (a), the end of the hose 31 extends from the large-diameter hole 22b of the joint body 22 toward the small-diameter hole 22a until the end 31a comes into contact with the flange 24a of the core member 24. The hose 31 and the pipe joint 21 are inserted between the 24c and the collet 28 to engage with each other. The inner surface 31b of the hose 31 contacts and seals the O-ring 30 on the shaft portion 24c, and there is no leakage of fluid even when the internal pressure in the pipe joint 21 is under no pressure or extremely low pressure. Pipe fitting of the present invention
21 has a sleeve 26 and a collet 28 in the large-diameter hole portion 22b of the joint main body 22, so when an internal pressure is applied to the pipe joint 21, the internal pressure in the small-diameter hole portion 22a causes the flange portion 24a of the core member 24. Is moved in the axial direction so as to approach the sleeve 26, and the collet 28 is engaged with the core member 24 and moves together with the core member 24. Then, the outer peripheral surface 28a of the collet 28 contacts the inclined surface 26c of the sleeve 26 and slides in the sleeve 26 in the axial direction as shown in FIG. 2 (b). At this time,
In the collet 28, the gap between the slits 28c is reduced and the diameter is reduced, and the plurality of concave and convex peripheral grooves 28b of the collet 28 are inserted into the outer peripheral surface of the outer cover 34 of the hose 31 with a wide peripheral surface. Then, the hose 31 moves to the opening 22c side while being sufficiently caulked, and the hose 31 and the pipe joint 21 are sufficiently tightened, and the hose 31
The fluid inside will not leak. The sleeve 26 has a maximum diameter portion 26d of the inclined surface portion 26c having a diameter of the flange portion of the core member 24.
Since it is smaller than the outer diameter of 24a, the flange portion 24 is locked to the maximum diameter portion 26d at a predetermined internal pressure. For this reason, the hose 31 is not excessively swaged by the collet 28 and the core member 24, and the occurrence of trauma such as the outer cover 34 is prevented, and the reinforcing layer is also prevented from being cut. The hose 31 is the small hole diameter part of the pipe joint 21
It is crimped only by the internal pressure in 22a and is fastened to the pipe joint 21 in a one-touch manner. Therefore, no crimping device or jig is required, and the tightening operation can be extremely easily performed.

また、管継手21を高圧の機器に接続する際、ホース31
を芯部材24の軸部24cとコレット28との間に挿入し、ホ
ース31と管継手21とが係合した状態においては、ホース
31は芯部材24に対し、または継手本体22に対し回転可能
であるので、管継手21はホース31をねじることなく、継
手本体22を回転して小径孔部22aのねじ部22gを機器の接
続部にねじ込み接続可能である。When connecting the pipe joint 21 to high-pressure equipment,
Is inserted between the shaft portion 24c of the core member 24 and the collet 28, and when the hose 31 and the pipe joint 21 are engaged, the hose
31 is rotatable with respect to the core member 24 or the joint body 22, so that the pipe joint 21 rotates the joint body 22 without twisting the hose 31 and connects the screw portion 22g of the small-diameter hole 22a to the equipment. It can be screwed into the part.

また、ホース31と管継手21は締結後でも、内圧を無負
荷にすると、ホース31はスリーブ26とともに継手本体22
に対して回転可能であるので、管継手21はホース31をね
じることなく、機器の接続部にねじ込み接続可能であ
る。Even after the hose 31 and the pipe joint 21 have been fastened, if the internal pressure is reduced to no load, the hose 31 is moved together with the sleeve 26 into the joint body 22.
The pipe joint 21 can be screwed and connected to the connection portion of the device without twisting the hose 31.

次に、本願の第１発明の第２実施例について説明す
る。Next, a second embodiment of the first invention of the present application will be described.

第５図は本願の第１発明に係る管継手の第２実施例41
を示す図である。第５図において、第１実施例と同じ構
成には同じ符号をつける。FIG. 5 shows a second embodiment 41 of the pipe joint according to the first invention of the present application.
FIG. In FIG. 5, the same components as those of the first embodiment are denoted by the same reference numerals.

第２実施例においては、第５図に示すように、継手本
体22の大径孔部22b内において、芯部材24のフランジ部2
4aとコレット28との間に円筒体42が介装されている。ホ
ース31は、ホース31の先端31cから円筒体42の長さだけ
離れた部分31dにおいて、コレット28の周溝28bと芯部材
24の軸部24cに加締められ緊締される。このため、ホー
ス31の先端部分がコレット28により損傷されることがな
くなり、円筒体がない場合に比べ、より高圧での使用を
可能にし寿命も長くなる。In the second embodiment, as shown in FIG. 5, the flange portion 2 of the core member 24 is accommodated in the large-diameter hole portion 22b of the joint body 22.
A cylindrical body 42 is interposed between 4a and the collet 28. The hose 31 includes a core member and a circumferential groove 28b of the collet 28 at a portion 31d that is away from the tip 31c of the hose 31 by the length of the cylindrical body 42.
It is caulked and tightened to the 24 shaft portions 24c. For this reason, the distal end portion of the hose 31 is not damaged by the collet 28, and can be used at a higher pressure and has a longer life than when there is no cylindrical body.

次に、本願の第１発明の第３実施例について説明す
る。Next, a third embodiment of the first invention of the present application will be described.

第６図は本願の第１発明に係る管継手の第３実施例45
を示す図である。FIG. 6 shows a third embodiment 45 of the pipe joint according to the first invention of the present application.
FIG.

第６図において、第１実施例と同じ構成には同じ符号
をつける。6, the same components as those of the first embodiment are denoted by the same reference numerals.

第３実施例においては、第６図に示すように、継手本
体22の大径孔部22b内において、スリーブ26が芯部材24
のフランジ部24aに接し、コレット28がスリーブ26より
開口22c側に配置された場合である。スリーブ26はその
内周面26bの直径が軸方向開口22c側に向って増大するよ
う、第１実施例の場合とは逆方向に傾斜した傾斜面部26
cを有している。また、コレット28は継手本体22の大径
孔部22b内でスリーブ26の傾斜面部26cに逆の傾斜で接触
する外周面28aを有すると共に、継手本体22の段差部22e
と止めリング27とにより継手本体22に固定されている。
小径孔部22a内の内圧によりフランジ部24aがコレット28
に接近するよう軸方向に移動するとともに、スリーブ26
がフランジ部24aに係合してフランジ部24aと一緒に移動
する。ホース31の端部31aはコレット28の縮径によりコ
レット28と軸部24cとの間に加締められ、管継手45に緊
締される。この結果、ホース31は開口22c側に殆ど移動
せずに加締めが完成する。In the third embodiment, as shown in FIG. 6, in the large-diameter hole portion 22b of the joint body 22, the sleeve 26 is
In this case, the collet 28 is disposed on the opening 22c side of the sleeve 26 in contact with the flange portion 24a. The sleeve 26 has an inclined surface 26 inclined in a direction opposite to that of the first embodiment so that the diameter of the inner peripheral surface 26b increases toward the axial opening 22c.
has c. The collet 28 has an outer peripheral surface 28a that contacts the inclined surface portion 26c of the sleeve 26 with a reverse inclination in the large-diameter hole portion 22b of the joint body 22, and a step portion 22e of the joint body 22.
And to the joint main body 22 by the retaining ring 27.
The internal pressure in the small-diameter hole 22a causes the flange 24a to
Move in the axial direction to approach
Engages with the flange portion 24a and moves together with the flange portion 24a. The end 31a of the hose 31 is crimped between the collet 28 and the shaft portion 24c due to the diameter reduction of the collet 28, and is tightened to the pipe joint 45. As a result, the hose 31 hardly moves to the opening 22c side, and the caulking is completed.

なお、前述の実施例において、スリーブ26は継手本体
22の大径孔部22bと別個のものとして説明したが、本発
明においては、これらの実施例に限らず、スリーブ26
は、第７図に示す本発明に係る管継手の第４実施例55の
ように、継手本体22の大径孔部22bの開口22cの近傍を塑
性変形させて、大径孔部22bがその内周面を開口22cに近
づくほど直径D₂₂が減少するよう大径孔部22bと一体的な
傾斜面部56を有してもよい。In the above-described embodiment, the sleeve 26 is
Although described as being separate from the large-diameter hole portion 22b of the sleeve 22, the present invention is not limited to these embodiments, and the sleeve 26
As in the fourth embodiment 55 of the pipe joint according to the present invention shown in FIG. 7, the vicinity of the opening 22c of the large-diameter hole 22b of the joint body 22 is plastically deformed so that the large-diameter hole 22b the inner peripheral surface diameter D ₂₂ closer to the opening 22c may have a large-diameter hole portion 22b integral with the inclined surface portion 56 so as to decrease.

また、コレット28は、その外周面28aがコレット28の
円錐状に形成された場合について説明したが、本発明に
おいてはこの実施例に限らず、外周面28aはスリーブ26
内でスリーブ26の傾斜面部26cに接触して軸方向に摺動
しながら縮径するならば、第８図（ａ）（ｂ）に示すよ
うに、円錐状のコレット28の外周面の一部であってもよ
いし、第８図（ｃ）（ｄ）に示すように、曲線状の外周
面28aを有するものであってもよいし、または、第８図
（ｅ）に示すように台形状のコレット28の端部を形成す
る外周面28aであってもよい。Further, the collet 28 has been described in the case where the outer peripheral surface 28a is formed in a conical shape of the collet 28, but the present invention is not limited to this embodiment, and the outer peripheral surface 28a is
If the diameter is reduced while sliding in the axial direction by contacting the inclined surface portion 26c of the sleeve 26, a part of the outer peripheral surface of the conical collet 28 as shown in FIGS. 8 (c) and (d), and may have a curved outer peripheral surface 28a, or as shown in FIG. 8 (e). An outer peripheral surface 28a forming an end of the collet 28 having a shape may be used.

次に、本願の第１発明の第５実施例について説明す
る。Next, a fifth embodiment of the first invention of the present application will be described.

第９〜11図は本願の第１発明の第５実施例を示す図で
あり、第１実施例と同じ構成には同じ符号をつける。第
５実施例においては、第９図に示すように、中間管継手
61は、図の中央線Ｃに対して各構成を左右対称になるよ
うになされたもので、左右の管継手61_A、61_Bは中央の小
径孔部22aにより連結している。第９図の中央線Ｃの右
側はホース31を管継手61_Bに挿入し係合したものを示
し、第10図は内圧が負荷され、ホース31の端部31aと管
継手61_Bが強固に締結したものを示す。この中間管継手6
1によれば、ホースの外傷時に外傷部を切除し中間管継
手61を介しての再連結が容易にでき、従来の接続時のよ
うに、加締機、ネジ部22gおよびスパナ掛けの為の六角
部等が不要となる。ホースを接続するためには、この中
間管継手に両側からホース31を挿入するだけでよいの
で、ホースの接続は迅速で容易にかつ運送時の単位長さ
を短くできる。第11図は支柱63に固定された複数の中間
管継手61を用いて複数のホース31を中間管継手61の両側
に接続した場合である。9 to 11 are views showing a fifth embodiment of the first invention of the present application, and the same reference numerals are given to the same components as those of the first embodiment. In the fifth embodiment, as shown in FIG.
61 has been made so as to be symmetrical to each component relative to the center line C of FIG, left and right of the pipe joint 61 _A, 61 _B are linked by a central small-diameter hole portion 22a. 9 view of the center line C right indicates that engagement by inserting the hose 31 to the pipe joint 61 _B, Fig. 10 is loaded pressure, end 31a and the pipe joint 61 _B of the hose 31 is firmly Shows what was concluded. This intermediate fitting 6
According to (1), when the hose is injured, the injured part can be cut off and reconnected via the intermediate pipe joint 61 easily, and as in the conventional connection, a crimping machine, a screw part 22g and a spanner Hexagons and the like become unnecessary. In order to connect the hoses, it is only necessary to insert the hoses 31 from both sides into this intermediate fitting, so that the hoses can be connected quickly and easily and the unit length during transportation can be shortened. FIG. 11 shows a case where a plurality of hoses 31 are connected to both sides of the intermediate pipe joint 61 by using a plurality of intermediate pipe joints 61 fixed to the support 63.

次に本願の第２発明の実施例について説明する。 Next, an embodiment of the second invention of the present application will be described.

第12〜14図は本発明の一実施例を示す図であり、第１
図と同じ構成には同じ符号をつける。FIGS. 12 to 14 are views showing an embodiment of the present invention.
The same components as those in the drawings are denoted by the same reference numerals.

この実施例においては、第12、13図に示すように、管
継手71はスリーブ26と止めリング27との間に介装されス
リーブ26を回転可能にする摺動部材としてのスラストベ
アリング73を有している。この管継手71は内圧が負荷さ
れると、前述のように、ホース31の端部31aと芯部材24
は軸方向の押圧力により開口22c側に押圧され、スリー
ブ26が止めリング27側に押しつけられるが、本発明の管
継手71はスリーブ26と止めリング27の間にスラストベア
リング73を有しているので、ホース31と管継手71とが締
結され、管継手71が機器に接続されて内圧が負荷された
時においても、ホース31は第14図に示すように、芯部材
24、コレット28およびスリーブ26と一体的となり継手本
体22に対して周方向に回転自在である。このため、内圧
の負荷時にも、ホース31はねじれることはない。In this embodiment, as shown in FIGS. 12 and 13, the pipe joint 71 has a thrust bearing 73 as a sliding member interposed between the sleeve 26 and the retaining ring 27 to enable the sleeve 26 to rotate. doing. When the internal pressure is applied, the pipe joint 71 is connected to the end 31a of the hose 31 and the core member 24 as described above.
Is pressed against the opening 22c side by the pressing force in the axial direction, and the sleeve 26 is pressed against the retaining ring 27 side.The pipe joint 71 of the present invention has a thrust bearing 73 between the sleeve 26 and the retaining ring 27. Therefore, even when the hose 31 and the pipe joint 71 are fastened and the pipe joint 71 is connected to the device and an internal pressure is applied, the hose 31 is still connected to the core member as shown in FIG.
24, the collet 28 and the sleeve 26 are integrated with each other and are rotatable in the circumferential direction with respect to the joint body 22. Therefore, the hose 31 is not twisted even when the internal pressure is applied.

次に、ホースを１種類と、管継手の試料を５種類（実
施例３種類、比較例２種）を作成し、本発明の効果を確
認したので説明する。Next, one kind of hose and five kinds of pipe joint samples (three kinds of examples and two kinds of comparative examples) were prepared, and the effect of the present invention was confirmed.

管継手の試料１は前述の第１実施例（第１図）と同じ
であり、継手本体の大径孔部の内径が20mm、コレットの
長さが15mm、スリットが12本である。試料２は前述の第
１実施例において、コレットがポリアセタールからなる
ものである。試料３は前述の第２実施例と同じ軸長10mm
の円筒体42を介装させたものである。試料４は前述の第
15図に示す従来の150kgf/cm²用の加締タイプの管継手と
同じ、試料５は前述の第17図に示す従来のワンタッチ式
管継手と同じものである。Sample 1 of the pipe joint is the same as in the first embodiment (FIG. 1) described above, in which the inner diameter of the large-diameter hole of the joint body is 20 mm, the length of the collet is 15 mm, and the number of slits is 12. Sample 2 is the same as the first embodiment except that the collet is made of polyacetal. Sample 3 has the same axial length of 10 mm as in the second embodiment.
The cylindrical body 42 is interposed. Sample 4 is
Sample 5 is the same as the conventional crimping type pipe joint for 150 kgf / cm ² shown in FIG. 15, and sample 5 is the same as the conventional one-touch type pipe joint shown in FIG.

試験は管継手の破壊圧試験Ａ、Ｂ、繰返し衝撃試験
Ａ、ＢについてJIZ B8362−1983に準じて実施した。破
壊圧試験Ａ、Ｂは管継手にホースを挿入又は緊締した
後、流体の圧力を徐々に上昇し、破壊時の圧力を測定し
た。破壊圧試験Ａは新品の試験ホースについて、破壊圧
試験Ｂは繰返し衝撃試験Ａを実施した後の試験ホースに
ついて実施した。繰返し衝撃試験Ａ、Ｂは流体温度100
℃でそれぞれ105kgf/cm²および140kgf/cm²までの衝撃圧
力を繰返し印加したときの破壊時の回数により評価し
た。試験結果は次表に示す。The tests were performed for pipe joint burst pressure tests A and B and repeated impact tests A and B according to JIZ B8362-1983. In the burst pressure tests A and B, after inserting or tightening a hose in the pipe joint, the pressure of the fluid was gradually increased, and the pressure at the time of breakage was measured. The burst pressure test A was performed on a new test hose, and the burst pressure test B was performed on the test hose after the repeated impact test A was performed. Repeated impact tests A and B are fluid temperature 100
It was evaluated by the number at break upon application of repeated impact pressure of up to 105kgf / cm ² and 140 kgf / cm ^2, respectively ° C.. The test results are shown in the following table.

試験結果は前表に示すように、試料１〜３（第１、２
実施例）は試料４、５（比較例１、２）に比較し、破壊
圧試験Ａおよび高圧の繰返し衝撃試験Ａ、Ｂに対して大
幅に優れた結果を示している。試料１〜３は試料４の比
較例１に比較し、破壊圧試験Ｂで耐圧性に優れた結果を
示すとともにホースの抜けおよび油漏れの発生がなく、
優れた結果を示している。 As shown in the preceding table, the test results are shown in Samples 1 to 3 (first, second,
Example) shows remarkably superior results in burst pressure test A and high-pressure repeated impact tests A and B as compared with samples 4 and 5 (comparative examples 1 and 2). Samples 1 to 3 showed excellent results in pressure resistance in the burst pressure test B as compared to Comparative Example 1 of Sample 4, and there was no hose coming off and no oil leakage.
Excellent results are shown.

（効果）以上説明したように、本願の発明によれば、第１筒部
材の大径孔部の内壁に摺動するフランジ部および軸部を
有する第２筒部材と、第１筒部材の大径孔部の内側に傾
斜面部（又はこれを有するスリーブ）および該傾斜面部
に内接して軸方向にスリーブに近づくことで、縮径する
コレットを設けることにより軸部とコレットとの間に挿
入されたホースの端部を小径孔部の内圧により、コレッ
トが縮径してホースにくい込むようにし、高圧の流体に
用いる複合構造のホースを管継手に挿入するのみで加締
用の機器、治具等を必要とせずワンタッチに締結し、配
管の作業性を著しく向上させることができる。(Effects) As described above, according to the invention of the present application, the second cylindrical member having the flange portion and the shaft portion sliding on the inner wall of the large-diameter hole portion of the first cylindrical member, and the large-sized first cylindrical member An inclined surface portion (or a sleeve having the same) is provided inside the radial hole portion and a collet that is inscribed in the inclined surface portion and approaches the sleeve in the axial direction is provided. The internal pressure of the small-diameter hole at the end of the hose reduces the diameter of the collet so that the hose does not enter the hose, and only inserts a composite-structured hose used for high-pressure fluid into the pipe joint. It can be fastened with one touch without the need for the like, and the workability of piping can be remarkably improved.

また、ホースを管継手の第２筒部材の軸部とコレット
の間に挿入して、ホースと管継手とを係合した状態では
ホースは第２筒部材または第１筒部材に対して回転可能
であるので、ホースをねじることなく、管継手を回転し
て、機器の接続部にねじ込み接続できる。When the hose is inserted between the shaft of the second tubular member of the pipe joint and the collet, and the hose and the pipe joint are engaged, the hose can rotate with respect to the second tubular member or the first tubular member. Therefore, the pipe joint can be rotated and screwed to the connection portion of the device without twisting the hose.

また、ホースと管継手とを、内圧を負荷して締結した
後にも、再び内圧を無負荷すると、スリーブは第１筒部
材に対して回転可能であるので、ホースをねじることな
く管継手を回転して機器の接続部に接続できる。Also, even after the hose and the fitting are fastened by applying the internal pressure, if the internal pressure is not applied again, the sleeve can rotate with respect to the first tubular member, so that the fitting is rotated without twisting the hose. Connected to the connection of the device.

さらにまた、本願の請求項３、４記載の発明によれ
ば、内圧負荷時にもホースの周方向への回転を許容させ
ることで、ホースをねじることなく、機器の可動部に使
用できる。Furthermore, according to the inventions described in claims 3 and 4 of the present application, by allowing the hose to rotate in the circumferential direction even when an internal pressure is applied, the hose can be used as a movable portion of a device without twisting the hose.

[Brief description of the drawings]

第１〜４図は本願の第１発明に係る管継手の第１実施例
を示す図であり、第１図はその一部縦断面図、第２図
（ａ）はホースを挿入時のその一部断面図、第２図
（ｂ）はホースを緊締時のその一部縦断面図、第３図は
そのコレットの正面図、第４図はそのコレットの一部縦
断面図である。第５〜７図はそれぞれ本願第１発明に係
る管継手の第２〜４実施例を示す一部縦断面図である。
第８図（ａ）〜（ｅ）はそれぞれ本発明に係る管継手の
コレットの他の実施例を示す図であり、第８図（ａ）は
その他の側面説明図、第８図（ｂ）は第８図（ａ）の正
面説明図、第８図（ｃ）はそのさらに他の側面説明図、
第８図（ｄ）は第８図（ｃ）の正面説明図、第８図
（ｅ）はそのもう１つさらに他の側面説明図である。第
９〜11図は本願第１発明の第５実施例を示す図であり、
第９図はその縦断面図、第10図はその作用を示す一部断
面図、第11図はその取付け状態を示す説明図である。第
12〜14図は本願の第２発明の一実施例を示す図であり、
第12図はその作用を示す縦断面図、第13図はその要部拡
大断面図、第14図は機器との接続を示す正面図である。
第15〜18図はそれぞれ従来の管継手を示す図であり、第
15図はその縦断面図、第16図（ａ）はその他の一部縦断
面図、第16図（ｂ）は第16図（ａ）にホースを締結時の
縦断面図、第17図はさらに他の縦断面図、第18図（ａ）
〜（ｃ）はそれぞれ管継手と機器との接続を示す正面図
である。 21、41、45、55、61、71……管継手、 22……継手本体（第１筒部材）、 22a……小径孔部、 22b……大径孔部、 24……芯部材（第２筒部材）、 24a……フランジ部、 24b……軸孔、 26……スリーブ、 26a……外周面、 26c……傾斜面部、 27……止めリング（係合部材）、 28……コレット、 28a……外周面、 29……Ｏリング（第１シール部材）、 30……Ｏリング（第２シール部材）、 31……ホース。1 to 4 are views showing a first embodiment of a pipe joint according to the first invention of the present application, wherein FIG. 1 is a partial longitudinal sectional view, and FIG. 2 (b) is a partial longitudinal sectional view of the hose when the hose is tightened, FIG. 3 is a front view of the collet, and FIG. 4 is a partial longitudinal sectional view of the collet. 5 to 7 are partial longitudinal sectional views showing second to fourth embodiments of the pipe joint according to the first invention of the present application.
8 (a) to 8 (e) are views showing another embodiment of the collet of the pipe joint according to the present invention. FIG. 8 (a) is another side explanatory view, and FIG. 8 (b). Fig. 8 (a) is a front view, Fig. 8 (c) is another side view,
FIG. 8D is a front view of FIG. 8C, and FIG. 8E is another side view of FIG. 9 to 11 are views showing a fifth embodiment of the first invention of the present application,
FIG. 9 is a longitudinal sectional view, FIG. 10 is a partial sectional view showing the operation, and FIG. 11 is an explanatory view showing an attached state. No.
12 to 14 are views showing an embodiment of the second invention of the present application,
FIG. 12 is a longitudinal sectional view showing the operation, FIG. 13 is an enlarged sectional view of a main part thereof, and FIG. 14 is a front view showing connection with equipment.
15 to 18 are views showing conventional pipe joints, respectively.
FIG. 15 is a longitudinal sectional view, FIG. 16 (a) is a partial longitudinal sectional view of other parts, FIG. 16 (b) is a longitudinal sectional view when a hose is fastened to FIG. 16 (a), and FIG. Still another longitudinal sectional view, FIG. 18 (a)
(C) is a front view showing the connection between the pipe joint and the device. 21, 41, 45, 55, 61, 71 ... pipe joint, 22 ... joint body (first cylindrical member), 22a ... small diameter hole, 22b ... large diameter hole, 24 ... core member (first 2a cylindrical member), 24a ... flange part, 24b ... shaft hole, 26 ... sleeve, 26a ... outer peripheral surface, 26c ... inclined surface part, 27 ... retaining ring (engaging member), 28 ... collet, 28a ... outer peripheral surface, 29 ... O-ring (first seal member), 30 ... O-ring (second seal member), 31 ... hose.

Claims

(57) [Claims]

1. A pipe joint for connecting a hose having a composite structure provided with a reinforcing layer having a void made of a fiber member, wherein the large diameter hole has a larger diameter than the small diameter hole and the small diameter hole connected to the small diameter hole. A first cylindrical member having: a second cylindrical member having a flange portion sliding in the axial direction with the large diameter hole portion of the first cylindrical member, and a shaft portion having a shaft hole connected to the flange portion and communicating with the small diameter hole portion; A first seal member for sealing between a large-diameter hole portion of the first cylinder member and a flange portion of the second cylinder member; a second seal member provided on an outer periphery of a shaft portion of the second cylinder member; A collet that is provided in the large-diameter hole so that a hose can be inserted from the large-diameter hole side toward the small-diameter hole side between the cylindrical member and the collet that can expand and contract when sliding in the axial direction. The second cylindrical member is provided in a large-diameter hole, and the second cylindrical member is operated by a fluid pressure acting on the flange. A sleeve that presses the collet inward in cooperation with the second cylindrical member when moving in the axial direction to reduce the diameter of the collet, from the large-diameter hole side to the small-diameter hole side. With the hose inserted between the shaft portion of the second cylindrical member and the collet, the second cylindrical member is moved in the axial direction by fluid pressure applied to the flange portion, and the hose is moved to the collet. A pipe joint characterized by being tightened by a sleeve and a second tubular member.

2. A pipe joint for connecting a hose having a composite structure provided with a reinforcing layer having a void made of a fiber member, wherein the large diameter hole has a larger diameter than the small diameter hole and the small diameter hole connected to the small diameter hole. A first cylindrical member having an inclined surface in which the diameter of the inner peripheral surface of the large-diameter hole decreases from the small-diameter hole toward the large-diameter hole; and a large-diameter of the first cylindrical member. A second cylindrical member having a flange portion sliding in the axial direction with the hole portion and a shaft portion having a shaft hole connected to the flange portion and communicating with the small-diameter hole portion; a large-diameter hole portion of the first cylindrical member and a second cylinder member; A first seal member for sealing between a flange portion of the member, a second seal member provided on an outer periphery of a shaft portion of the second tubular member, and a small diameter between the large-diameter hole portion and the second tubular member. It is provided in the large-diameter hole so that the hose can be inserted toward the hole, and is connected to the second cylindrical member. A cylindrical collet that reduces its diameter when moving in the axial direction in the inclined surface portion; and a shaft portion of the second cylindrical member and the collet from the large-diameter hole portion side to the small-diameter hole portion side. The second cylinder member and the collet are moved in the axial direction by fluid pressure applied to the flange portion in a state where the hose is inserted between the second cylinder member and the second cylinder member, and the hose is tightened by the collet and the second cylinder member. A pipe fitting characterized by the following.

3. The inclined surface of the first cylindrical member is provided with an inclined surface having an inner peripheral surface diameter decreasing from the small-diameter hole toward the large-diameter hole. 3. The pipe joint according to claim 2, comprising a sleeve whose axial movement is restricted.

4. A pipe joint for connecting a hose having a composite structure provided with a reinforcing layer having a void made of a fiber member, wherein the large diameter hole has a larger diameter than the small diameter hole and the small diameter hole connected to the small diameter hole. A second cylindrical member having a first cylindrical member having: a first cylindrical member; a second cylindrical member having a flange portion sliding in the axial direction with the large-diameter hole portion of the first cylindrical member; A first seal member for sealing between a large-diameter hole portion of the first cylinder member and a flange portion of the second cylinder member; a second seal member provided on an outer periphery of a shaft portion of the second cylinder member; An outer peripheral surface portion inclined so that the diameter decreases from the large-diameter hole portion side toward the small-diameter hole portion side; and an inner peripheral surface portion formed with a plurality of convex portions, and the large-diameter portion is provided between the large-diameter hole portion and the second cylindrical member. Provided inside the large diameter hole so that the hose can be inserted from the hole side to the small diameter hole side And a collet whose axial movement of the large-diameter hole is regulated by the first cylindrical member; and a diameter of the collet decreases from the large-diameter hole toward the small-diameter hole and the outer periphery of the collet. An inner peripheral surface portion that can abut on the surface portion, and when the abutment member contacts the flange portion of the second cylindrical member and moves in the axial direction in conjunction with the second cylindrical member, the outer peripheral surface portion of the collet is added inward. A sleeve for compressing the collet to reduce the diameter of the collet, wherein the second hole extends from the large-diameter hole side toward the small-diameter hole side.
In a state where a hose is inserted between the shaft portion of the cylindrical member and the collet, the second pressure is applied by the fluid pressure applied to the flange portion.
A pipe joint, wherein a tube member and a sleeve are moved in an axial direction, and the hose is tightened by the collet, the sleeve and the second tube member.