JP4104364B2

JP4104364B2 - Swivel fitting

Info

Publication number: JP4104364B2
Application number: JP2002094739A
Authority: JP
Inventors: 黒沢勲冶
Original assignee: KABUSHIKI KAISYA TSUKIJI SEISAKUSYO
Current assignee: KABUSHIKI KAISYA TSUKIJI SEISAKUSYO
Priority date: 2002-03-29
Filing date: 2002-03-29
Publication date: 2008-06-18
Anticipated expiration: 2022-03-29
Also published as: JP2003287175A

Description

【０００１】
【発明の属します技術分野】
本発明は、流路を有します油圧機器に油圧ホース等を接続しますのに適合しますスイベル継手に関します。
【０００２】
【従来の技術】
スイベル継手の一例は、特開平２００１−９９３７１号公報に記載されています。このスイベル継手は、管状の第一部材と、この第一部材にスリーブを介して結合します環状の第二部材とから成る。
上記構成に於いては、各部材を組み合わせる際に、スリーブに第２部材を貫通させ、次に貫通したスリーブ先端部に複数個の部材（たとえば、止め具、ボールなど）を装着します。しかる後に、スリーブの一端部をカシメて、第一部材と第二部材とを結合します。
しかしながら上記構成にあっては、（１）部品点数が多い、（２）組み合わせが面倒であるというような問題点があった。
【０００３】
【発明が解決しようとします課題】
本発明は、以上のような従来の実施例が有します問題点に鑑み、継手の骨格となる部材を「二つの成形品」にし、組み合わせが容易であると共に、安価に製作しますことができるスイベル継手を提供しますことである。
【０００４】
【課題を解決しますための手段】
本発明のスイベル継手は、中央部の外周壁に形成されたナット部１２を基準として、一端部側１ａにホース継手３の係止片４が係合します係合溝５を有し、一方、他端部側の挿入部にシール面１７及び摺接面１８を有しますパイプ状の継手本体１と、前記ナット部１２の受け面１２ａに対して、その当り面２５ａが摺接します第２ナット部２５を有しますと共に、前記シール面１７及び摺接面１８に対しますシール面２６と嵌合面２８を有し、かつ、前記挿入部に回転自在に外嵌合します筒状連結体１５と、この筒状連結体１５を完全に貫通した前記継手本体１の他端部１ｂの嵌合溝２３に嵌め込まれる止め具２２と、前記筒状連結体１５の第２ナット部２５に連設します外周壁に形成され、かつ油圧機器８の流路９側のメネジ部３０に螺合します螺合部２７とから成る。
【０００５】
また本発明のスイベル継手は、中央部の外周壁に形成されたナット部１２を基準として、一端部側１ａにホース継手３Ｂが螺合します継手螺合部４１を有し、一方、他端部側の挿入部にシール面１７Ｂ及び摺接面１８を有しますパイプ状の継手本体１Ｂと、前記ナット部１２の受け面に対して、その当り面が摺接します第２ナット部２５を有しますと共に、前記シール面１７Ｂ及び摺接面１８に対しますシール面２６Ｂと嵌合面２８を有し、かつ、前記挿入部に回転自在に外嵌合します筒状連結体１５と、この筒状連結体１５を完全に貫通した前記継手本体１Ｂの他端部１ｂの嵌合溝２３に嵌め込まれる止め具２２と、前記筒状連結体１５の第２ナット部２５に連設します外周壁に形成され、かつ油圧機器８の流路９側のメネジ部３０に螺合します螺合部２７とから成り、前記継手本体１Ｂの一端部側１ａの内側に、その端面から突出し、かつ、ホース継手３Ｂの中に可撓性ホース２を介して該可撓性ホースの挿入端部内へと強制的に圧入可能な嵌入頭部４２を設け、この嵌入頭部４２に連設します筒状首部４３の外周壁と前記一端部側１ａの内周壁との間に可撓性ホース２の挿入端部が入り込む環状の間隙部４４を形成したことを特徴とします。
【０００６】
また本発明のスイベル継手は、一端部側１ａにはホース継手３の係止片４が係合します係合溝５を有しますと共に他端部がキャップ状に形成した継手本体１Ａと、この継手本体１Ａと止め具２２Ａを介して結合します筒状連結体１５Ａとから成るスイベル継手Ｘ１であって、継手本体１Ａは筒状連結体１５Ａの一端部に互いのシール面１７Ａ、２６Ａ並びに内装された前記弾発性止め具２２Ａを介して筒状連結体１５Ａに回転自在に外嵌合しますことを特徴とします。
【０００７】
【発明の実施の形態】
図１乃至図５に示す第１実施例のスイベル継手Ｘについて説明します。１は一端部側１ａの外周壁に可撓性ホース（例えば油圧ホース）２を連結したホース継手３の指先状係止片４と係合します係合溝５を有しますパイプ状継手本体である。
この継手本体１は一端部側１ａにホース継手３の流路６と連通します開口部７を有し、一方、他端部側１ｂには油圧機器８の流路９と連通します開口部１０を有します。
【０００８】
一端部側１ａの開口部７の径は他端部側１ｂの開口部１０のそれよりも大きい。そして、両方の開口部７，１０は、水平状態に連通し、一つの継手流路１１を形成しています。すなわち、この実施例では、継手本体１のみで継手１１の流路を構成しています。
【０００９】
さて、継手本体１には、中央部の外周壁にナット部１２が突出形成されています。このナット部１２を基準として一端部側１ａの外周壁に前述した係合溝５が周設されています。係合溝５は図１で示すように断面がゆるやかな弧状を呈しており、ホース継手３の係止片４の基端部４ａとの関係では、係止機能を有しますカム面５ａとなっています。
【００１０】
すなわち、ホース継手（例えば「カムロック」と称される継手）３は、たとえば対称的に２本の回動式係止片４、４を有し、これらの指先状の基端部４ａ，４ａは、横軸１３、１３を介して枢止されており、継手本体の係合溝５のカム面５ａを摺接します。したがって、図１で示すように係止片４が水平状態に傾倒した場合には、ホース継手３は２本の係止片４、４を介して継手本体１の一端部側に連結される。
【００１１】
次に継手本体１のナット部１２を基準とした他端部側１ｂは、本実施例では後述します筒状連結体１５との関係では挿入部１６となっています。この挿入部１６の外周壁は、前記ナット部近傍の大径シール面１７と、この大径シール面１７に段差状に連設しますやや長い摺接面１８とに一応区別しますことができる。
【００１２】
しかして、前記大径シール面１７には第１のオーリング１９用の周溝２０が形成されていますと共に、該周溝２０の隣の面も大径シール面１７の一部を構成し、そして、該一部に第２のオーリング２１が装着されています。
また、筒状連結体１５を完全に貫通した前記継手本体１の他端部１ｂの嵌合溝２３には、Ｃ型状止め具２２が嵌着しています。
【００１３】
次に筒状連結体１５について説明します。第１実施例の筒状連結体１５は継手本体１の他端部側１ｂの挿入部１６に大径シール面１７および摺接面１８を介して回転自在に外嵌合しています。この筒状連結体１５は、継手本体１のナット部１２を形成します受け面１２ａとストッパーとしての止め具２２との間で継手本体１に対して相対的に回転可能に装着されていますから、たとえば筒状連結体１５が油圧機器８に固定的に連結された場合には、継手本体１の方が固定側部材８，１５に対して回転可能となる。
【００１４】
しかして、筒状連結体１５は、一端部側に継手本体１のナット部１２の受け面１２ａとの摺接します第２ナット部２５を有し、該第２ナット部２５の大径の内周壁には、前述した第１及び第２のオーリング１９、２１に圧接しますシール面２６となっています。また筒状連結体は、その外周壁に第２ナット部２５にに連設します螺合部２７を有し、該螺合部２７の小径の内周壁は、継手本体１の摺接面１８に対します嵌合面２８となっています。そして、筒状連結体１５の螺合部（オネジ部）２７は、油圧機器８の開口部に形成されたメネジ部３０に螺着します。
【００１５】
上記構成に於いて、継手本体１の大径シール面１７に第１および第２のオーリング１９、２１を嵌着した後に、継手本体１の他端部側１ｂを筒状連結体１５に嵌挿します。次に継手本体１の第１ナット部１２の受け面１２ａと筒状連結体１５の第２ナット部２５の当り面２５ａとが面接触した所で筒状連結体１５から貫通した継手本体１の他端部側１ｂの嵌合溝２３に止め具２２を嵌め込む。そうしますと、とスイベル継手Ｘが簡単に出来上がる。
【００１６】
しかして、スイベル継手Ｘを油圧機器８に取り付ける場合には、図１で示すように筒状連結体１５のオネジ部２８を油圧機器８のメネジ部３０にねじ込む。この時ホース２が捩れています時には、継手本体１の方を適宜に回転させる。
【００１７】
【実施例】
この欄では、本発明の第１実施例と異なる他の実施例について説明します。なお、他の実施例の説明に当っては前記第１実施例と同一構成の部分には同一又は同様の符号を付し、重複します説明を省略します。
【００１８】
図６乃至図８は、本発明の第２実施例のスイベル継手Ｘ１である。この第２実施例が第１実施例と主に異なる点は、継手本体１Ａと筒状連結体１５Ａの両部材を結合します止め具２２Ａがスイベル継手Ｘ１の内部に設けたことである。
【００１９】
しかして、まず継手本体１Ａから説明しますと、その他端部はキャップ状に形成されています。そして、該継手本体１Ａは筒状連結体１５Ａの一端部に互いのシール面１７Ａ、２６Ａ並びに前記弾発性止め具２２Ａを介して回転自在に外嵌合します。継手本体１Ａは、他端部に内装したＣ型状止め具２２Ａを介して回転しますので、他端部側の大径内周壁には嵌合溝２３Ａが形成されています。
【００２０】
次に筒状連結体１５Ａについて説明します。筒状連結体１５Ａは継手本体１Ａと略同一の長さの成形品である。筒状連結体１５Ａの中央部の外周壁にはナット部２５が周設され、このナット部２５を基準とします一端部側のシール面２６Ａには、第１オーリング１９と第２オーリング２１とが嵌着します周溝がそれぞれ形成されています。また、第２オーリング２１が嵌着します周溝と前記ナット部２５との間には継手本体１Ａの嵌合溝２３Ａと対向します止め具２２Ａ用の第２嵌合溝２９が形成されています。ナット部２５を基準とします他端部側には、油圧機器８のメネジ部３０と螺合します螺合部２７Ａが形成されています。
【００２１】
上記のように構成しても、スイベル継手Ｘ１を「二つの成形品」にし、両成形品を、止め具を介して簡単に回転自在に組み合わせることができる。
【００２２】
図９乃至図１１は，本発明の第３実施例のスイベル継手Ｘ２である。この第３実施例が前記第１実施例と主に異なる点は、継手本体１Ｂ一端部側１ａの外周壁に継手螺合部（オネジ部）４１を形成したこと、また、前記継手本体１Ｂの一端部側１ａの内側に、その端面から突出し、かつ、ホース継手３Ｂの中に可撓性ホース２を介して該可撓性ホースの挿入端部内へと強制的に圧入可能なソロバン玉形状（断面のテーパ面が山形状の意味合い。）の嵌入頭部４２を設けたこと、この嵌入頭部４２に連設します筒状首部４３の外周壁と前記一端部側１ａの内周壁との間に可撓性ホース２の挿入端部が入り込む環状の間隙部４４を形成したことである。
【００２３】
なお、前述したホース継手３Ｂは、図９で示すように可撓性ホース２の端部に外嵌合しますホース締付けカラー４６と、この締付けカラー４６のフランジ状被係合部４７と係合します係合部４８を有しますと共に、内壁面に継手本体１Ｂの継手螺合部４１と螺合しますメネジ部４９を有します連結ナット５０とから成っています。
【００２４】
上記構成に於いて、ホース継手３Ｂを継手本体１Ｂに螺着します際に、まずホース挿入端部をホース継手３Ｂの締付けカラー４６に貫通させると共に、ホース挿入端部に継手本体１Ｂの嵌入頭部４２を嵌め込む。そうしますと、ホース挿入端部はその弾性力に抗して外拡変位します。しかる後に、ホース継手３Ｂを継手本体１Ｂに螺合しますと、ホース２は嵌入頭部４２のテーパ面と前記締付けカラー４６とによって挟持される。
【００２５】
ところでも前記第３実施例にあっては、図１２のように設計変更しても良い。この変形例（ここでは説明の便宜上「第４実施例」とします。）のスイベル継手Ｘ３は、第２実施例と同様に継手本体１Ｃの他端部をキャップ状に形成した点、筒状連結体１５Ｃを第２実施例と同様に形成した点、該継手本体１Ｃは筒状連結体１５Ｃの一端部に互いのシール面１７Ｃ、２６Ｃ並びに前記弾発性止め具２２Ｃを介して回転自在に外嵌合します点が異なる。なお、２７Ｃは油圧機器８の流路９内のメネジ部３０と螺合します螺合部２７Ｃである。
【００２６】
【発明の効果】
以上の説明から明らかなように、本発明にあっては、次に列挙しますような作用・効果がある。
（１）継手の骨格となる部材を「二つの成形品」にしたので、組み合わせが容易である。
（２）部品点数が少ないので安価に製作しますことができる。
（３）ホースの捩れを防止できる。
【図面の簡単な説明】
図１乃至図５は本発明の第１実施例を示す各説明図。図６乃至図８は本発明の第２実施例を示す各説明図。図９乃至図１１は本発明の第３実施例を示す各説明図。図１２は本発明の第３実施の変形例示す説明図。
【図１】本発明の第１実施例の使用状態の説明図である。
【図２】本発明の正面図。
【図３】本発明の左側面図
【図４】図２の４−４線断面図。
【図５】本発明の分解斜視図。
【図６】第２実施の形態を示す説明図。
【図７】第２実施の正面図。
【図８】第２実施の分解斜視図。
【図９】第３実施の形態を示す説明図。
【図１０】第３実施の正面図。
【図１１】第３実施の分解斜視図。
【図１２】第３実施の変形例示す説明図。
【符号の説明】
Ｘ，Ｘ１，Ｘ２、Ｘ３…スイベル継手、１，１Ａ，１Ｂ，１Ｃ…継手本体、２…可撓性ホース、３，３Ａ，３Ｂ…ホース継手、４…係止片、５…係合溝、６…流路、７…開口部、８…油圧機器、９…流路、１０…開口部、１１…継手流路、１２…ナット、１３…横軸、１５，１５Ａ，１５Ｂ，１５Ｃ…筒状連結体、１６…挿入部、１７，１７Ａ，１７Ｂ，１７Ｃ…大径シール面、１８…摺接面、１９…第１のオーリング、２０…周溝、２１…オーリング、２２，２２Ｂ，２２Ｃ…止め具、２３，２３Ｂ，２３Ｃ…嵌合溝、２５…第２ナット部、２６，２６Ａ，２６Ｂ、２６Ｃ…シール面、２７，２７Ａ，２７Ｂ，２７Ｃ…螺合部、２８，２８Ａ，…嵌合面、３０…メネジ，４１…継手螺合部、４２…嵌入頭部、４３…筒状首部、４４…間隙部、４６ホース締付け用カラー、４７…被係合部、４８…係合部、４９…メネジ部、５０…連結ナット。[0001]
[Technical field to which the invention belongs]
The present invention relates to a swivel joint suitable for connecting a hydraulic hose or the like to a hydraulic device having a flow path.
[0002]
[Prior art]
An example of a swivel joint is described in Japanese Patent Laid-Open No. 2001-99371. The swivel joint includes a tubular first member and an annular second member coupled to the first member via a sleeve.
In the above configuration, when combining each member, the second member is passed through the sleeve, and then multiple members (for example, fasteners, balls, etc.) are attached to the end of the sleeve that has passed through. After that, crimp one end of the sleeve and join the first and second members.
However, the above configuration has the problems that (1) the number of parts is large and (2) the combination is troublesome.
[0003]
[Problems to be solved by the invention]
In the present invention, in view of the problems of the conventional examples as described above, the member that becomes the skeleton of the joint is made of “two molded products”, which can be easily combined and manufactured at low cost. It is to provide a swivel joint that can.
[0004]
[Means for solving problems]
The swivel joint of the present invention has an engagement groove 5 on one end side 1a for engaging the locking piece 4 of the hose joint 3 with reference to the nut part 12 formed on the outer peripheral wall of the center part . The contact surface 25a is in sliding contact with the pipe-like joint body 1 having the seal surface 17 and the sliding contact surface 18 at the other end side insertion portion and the receiving surface 12a of the nut portion 12. A cylinder that has a second nut portion 25, and further has a sealing surface 26 and a fitting surface 28 with respect to the sealing surface 17 and the sliding contact surface 18, and is rotatably fitted to the insertion portion . A coupling body 15, a stopper 22 fitted into the fitting groove 23 of the other end 1 b of the joint body 1 that completely penetrates the cylindrical coupling body 15, and a second nut portion of the cylindrical coupling body 15 formed on the outer peripheral wall and continuously to 25, and screwed into the flow path 9 side of the female screw portion 30 of the hydraulic equipment 8 And a threaded portion 27.
[0005]
Further, the swivel joint of the present invention has a joint threaded portion 41 in which the hose joint 3B is threadedly engaged with the one end side 1a on the basis of the nut portion 12 formed on the outer peripheral wall of the central portion . A pipe-like joint body 1B having a seal surface 17B and a sliding contact surface 18 in the insertion portion on the side of the part, and a second nut portion 25 whose contact surface comes into sliding contact with the receiving surface of the nut portion 12 A cylindrical coupling body 15 having a sealing surface 26B and a fitting surface 28 with respect to the sealing surface 17B and the sliding contact surface 18 and being rotatably fitted to the insertion portion ; A stopper 22 fitted into the fitting groove 23 of the other end 1b of the joint body 1B completely penetrating through the tubular connecting body 15 and a second nut portion 25 of the tubular connecting body 15 are connected. formed on the outer peripheral wall, and screwed into the flow path 9 side of the female screw portion 30 of the hydraulic equipment 8 The first hose joint 3B is inserted into the hose joint 3B via the flexible hose 2. The first hose joint 3B is inserted into the hose joint 3B. An insertion head 42 that can be forcibly press-fitted into the end portion is provided, and is provided continuously with the insertion head portion 42. The flexibility is provided between the outer peripheral wall of the cylindrical neck portion 43 and the inner peripheral wall of the one end side 1a. It is characterized by the formation of an annular gap 44 where the insertion end of the hose 2 enters.
[0006]
The swivel joint of the present invention has a joint body 1A having an engagement groove 5 on one end side 1a to which the locking piece 4 of the hose joint 3 is engaged, and the other end formed in a cap shape, The swivel joint X1 is composed of the joint body 1A and the tubular connecting body 15A coupled via the stopper 22A. The joint body 1A is connected to one end of the tubular connecting body 15A with the seal surfaces 17A, 26A and It is characterized in that it is externally fitted to the cylindrical connector 15A via the internal elastic stopper 22A.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The swivel joint X of the first embodiment shown in FIGS. 1 to 5 will be described. 1 has an engaging groove 5 that engages with a fingertip-like locking piece 4 of a hose joint 3 in which a flexible hose (for example, a hydraulic hose) 2 is connected to an outer peripheral wall of one end side 1a. It is.
This joint body 1 has an opening 7 that communicates with the flow path 6 of the hose joint 3 on one end side 1a, and an opening that communicates with the flow path 9 of the hydraulic device 8 on the other end 1b. I have 10.
[0008]
The diameter of the opening 7 on the one end side 1a is larger than that of the opening 10 on the other end 1b. Both the openings 7 and 10 communicate with each other in a horizontal state to form one joint flow path 11. In other words, in this embodiment, the flow path of the joint 11 is constituted only by the joint body 1.
[0009]
The joint body 1 has a nut 12 projecting from the outer peripheral wall of the center. With the nut portion 12 as a reference, the engagement groove 5 described above is provided around the outer peripheral wall on the one end side 1a. As shown in FIG. 1, the engagement groove 5 has an arc shape with a gentle cross section, and has a locking function in relation to the base end portion 4 a of the locking piece 4 of the hose joint 3. It has become.
[0010]
That is, the hose joint (for example, a joint called “cam lock”) 3 has, for example, two rotational locking pieces 4, 4 symmetrically, and these fingertip-shaped base ends 4 a, 4 a are These are pivoted via the horizontal shafts 13 and 13 and slidably contact the cam surface 5a of the engagement groove 5 of the joint body. Therefore, as shown in FIG. 1, when the locking piece 4 is tilted in a horizontal state, the hose joint 3 is connected to one end side of the joint body 1 through the two locking pieces 4, 4.
[0011]
Next, the other end 1b with respect to the nut portion 12 of the joint body 1 serves as an insertion portion 16 in relation to the cylindrical connector 15 described later in this embodiment. The outer peripheral wall of the insertion portion 16 can be distinguished from the large-diameter seal surface 17 in the vicinity of the nut portion and the slightly long slidable contact surface 18 connected to the large-diameter seal surface 17 in a step shape. .
[0012]
Thus, a circumferential groove 20 for the first O-ring 19 is formed on the large-diameter seal surface 17, and a surface adjacent to the circumferential groove 20 also constitutes a part of the large-diameter seal surface 17. And the second O-ring 21 is attached to the part.
In addition, a C-shaped stopper 22 is fitted in the fitting groove 23 of the other end 1b of the joint body 1 that has completely penetrated the tubular connecting body 15.
[0013]
Next, the cylindrical connector 15 will be described. The cylindrical connecting body 15 of the first embodiment is rotatably fitted to the insertion portion 16 on the other end 1b of the joint body 1 via a large-diameter seal surface 17 and a sliding contact surface 18. This cylindrical connecting body 15 forms the nut portion 12 of the joint body 1 and is mounted so as to be rotatable relative to the joint body 1 between the receiving surface 12a and a stopper 22 as a stopper. For example, when the cylindrical connecting body 15 is fixedly connected to the hydraulic device 8, the joint body 1 can rotate with respect to the fixed-side members 8 and 15.
[0014]
Thus, the cylindrical connecting body 15 has a second nut portion 25 that is in sliding contact with the receiving surface 12a of the nut portion 12 of the joint body 1 on one end side, and the inner diameter of the second nut portion 25 is larger. The peripheral wall has a sealing surface 26 that presses against the first and second O-rings 19 and 21 described above. Further, the cylindrical coupling body has a threaded portion 27 that is connected to the second nut portion 25 on the outer peripheral wall thereof, and the inner peripheral wall of the small diameter of the threaded portion 27 is a sliding contact surface 18 of the joint body 1. On the other hand, it is a mating surface 28. Then, the threaded portion (male thread portion) 27 of the cylindrical connector 15 is screwed to the female thread portion 30 formed at the opening of the hydraulic device 8.
[0015]
In the above configuration, after fitting the first and second O-rings 19 and 21 to the large-diameter seal surface 17 of the joint body 1, the other end 1 b of the joint body 1 is fitted to the tubular connector 15. Insert. Next, the joint body 1 penetrating from the tubular coupling body 15 at the place where the receiving surface 12a of the first nut portion 12 of the joint body 1 and the contact surface 25a of the second nut portion 25 of the tubular coupling body 15 are in surface contact. The stopper 22 is fitted into the fitting groove 23 on the other end 1b. Then, swivel joint X is easily completed.
[0016]
Thus, when the swivel joint X is attached to the hydraulic device 8, the male screw portion 28 of the cylindrical connector 15 is screwed into the female screw portion 30 of the hydraulic device 8 as shown in FIG. 1. At this time, when the hose 2 is twisted, the joint body 1 is rotated appropriately.
[0017]
【Example】
This section describes another embodiment that is different from the first embodiment of the present invention. In the description of the other embodiments, the same or similar reference numerals are given to the same components as those in the first embodiment, and duplicate descriptions are omitted.
[0018]
6 to 8 show a swivel joint X1 according to the second embodiment of the present invention. The second embodiment is mainly different from the first embodiment in that a stopper 22A for connecting both the joint body 1A and the cylindrical connector 15A is provided inside the swivel joint X1.
[0019]
First, the joint body 1A will be explained. The other end is formed in a cap shape. The joint body 1A is rotatably fitted to one end portion of the cylindrical connecting body 15A via the seal surfaces 17A and 26A and the elastic stopper 22A. Since the joint body 1A rotates via a C-shaped stopper 22A built in the other end, a fitting groove 23A is formed in the large-diameter inner peripheral wall on the other end.
[0020]
Next, the cylindrical connector 15A will be described. The cylindrical connector 15A is a molded product having substantially the same length as the joint body 1A. A nut portion 25 is provided around the outer peripheral wall of the central portion of the cylindrical connecting body 15A, and the first O-ring 19 and the second O-ring 21 are provided on the seal surface 26A on one end portion with reference to the nut portion 25. A circumferential groove is formed on each. Further, a second fitting groove 29 for the stopper 22A is formed between the circumferential groove into which the second O-ring 21 is fitted and the nut portion 25 so as to face the fitting groove 23A of the joint body 1A. It is. On the other end side with the nut portion 25 as a reference, a threaded portion 27A that is threadedly engaged with the female thread portion 30 of the hydraulic device 8 is formed.
[0021]
Even if it comprises as mentioned above, swivel joint X1 can be made into "two molded products", and both molded products can be easily rotatably combined via a fastener.
[0022]
9 to 11 show a swivel joint X2 according to a third embodiment of the present invention. The third embodiment is mainly different from the first embodiment in that a joint threaded portion (male thread portion) 41 is formed on the outer peripheral wall of the joint body 1B one end side 1a, and that the joint body 1B An abacus ball shape that protrudes from the end face inside the one end side 1a and can be forcibly press-fitted into the insertion end of the flexible hose through the flexible hose 2 in the hose joint 3B ( The tapered surface of the cross section has a mountain shape.) Between the outer peripheral wall of the cylindrical neck portion 43 and the inner peripheral wall of the one end side 1a, which is connected to the inserted head portion 42. That is, an annular gap portion 44 into which the insertion end portion of the flexible hose 2 enters is formed.
[0023]
The hose joint 3B described above is fitted to the end of the flexible hose 2 as shown in FIG. 9 and engages with a hose fastening collar 46 and a flange-like engaged portion 47 of the fastening collar 46. It has an engaging part 48 and a connecting nut 50 that has a female threaded part 49 that engages with the joint threaded part 41 of the joint body 1B on the inner wall surface.
[0024]
In the above configuration, when the hose joint 3B is screwed to the joint body 1B, the hose insertion end is first passed through the fastening collar 46 of the hose joint 3B, and the fitting body 1B is inserted into the hose insertion end. The part 42 is fitted. Then, the hose insertion end will be displaced outward against its elastic force. Thereafter, when the hose joint 3B is screwed into the joint body 1B, the hose 2 is sandwiched between the tapered surface of the fitting head 42 and the tightening collar 46.
[0025]
By the way, in the third embodiment, the design may be changed as shown in FIG. The swivel joint X3 of this modified example (here, “fourth embodiment” for convenience of explanation) is similar to the second embodiment in that the other end of the joint body 1C is formed in a cap shape, and is a cylindrical connection. The body 15C is formed in the same manner as in the second embodiment, and the joint body 1C is rotatably attached to one end of the cylindrical connecting body 15C via the sealing surfaces 17C and 26C and the elastic stopper 22C. The point of mating is different. Reference numeral 27 </ b> C denotes a threaded portion 27 </ b> C that is threadedly engaged with the female thread portion 30 in the flow path 9 of the hydraulic device 8.
[0026]
【The invention's effect】
As is clear from the above description, the present invention has the following actions and effects.
(1) Since the member which becomes the skeleton of the joint is made of “two molded products”, the combination is easy.
(2) Since the number of parts is small, it can be manufactured at low cost.
(3) The hose can be prevented from being twisted.
[Brief description of the drawings]
1 to 5 are explanatory views showing a first embodiment of the present invention. 6 to 8 are explanatory views showing a second embodiment of the present invention. 9 to 11 are explanatory views showing a third embodiment of the present invention. FIG. 12 is an explanatory view showing a modification of the third embodiment of the present invention.
FIG. 1 is an explanatory diagram of a use state of a first embodiment of the present invention.
FIG. 2 is a front view of the present invention.
3 is a left side view of the present invention. FIG. 4 is a sectional view taken along line 4-4 of FIG.
FIG. 5 is an exploded perspective view of the present invention.
FIG. 6 is an explanatory diagram showing a second embodiment.
FIG. 7 is a front view of a second embodiment.
FIG. 8 is an exploded perspective view of a second embodiment.
FIG. 9 is an explanatory diagram showing a third embodiment.
FIG. 10 is a front view of a third embodiment.
FIG. 11 is an exploded perspective view of a third embodiment.
FIG. 12 is an explanatory diagram showing a modification of the third embodiment.
[Explanation of symbols]
X, X1, X2, X3 ... swivel joint, 1, 1A, 1B, 1C ... main body, 2 ... flexible hose, 3, 3A, 3B ... hose joint, 4 ... locking piece, 5 ... engagement groove, DESCRIPTION OF SYMBOLS 6 ... Flow path, 7 ... Opening part, 8 ... Hydraulic equipment, 9 ... Flow path, 10 ... Opening part, 11 ... Joint flow path, 12 ... Nut, 13 ... Horizontal axis, 15, 15A, 15B, 15C ... Cylindrical shape Connected body 16 ... insertion portion 17, 17A, 17B, 17C ... large diameter sealing surface, 18 ... sliding contact surface, 19 ... first O-ring, 20 ... circumferential groove, 21 ... O-ring, 22, 22B, 22C ... Stopper, 23, 23B, 23C ... Fitting groove, 25 ... Second nut part, 26, 26A, 26B, 26C ... Seal surface, 27, 27A, 27B, 27C ... Screwed part, 28, 28A, ... 30 ... Female thread, 41 ... Joint screwing part, 42 ... Inserting head part, 43 ... Cylindrical neck part, 44 ... Gap part 46 Color tightening hose, 47 ... engaged portion, 48 ... engaging portion, 49 ... female screw part, 50 ... connecting nut.

Claims

With the nut portion 12 formed on the outer peripheral wall of the center as a reference , the engaging piece 4 of the hose joint 3 engages with the one end side 1a, while the other end side is inserted. reserves the sealing surface 17 and the sliding surface 18 and a pipe-shaped joint body 1 in section, with respect to the receiving surface 12a of the nut 12, the contact surface 25a has a second nut 25 which will slidingly contacts In addition, the cylindrical coupling body 15 which has a sealing surface 26 and a fitting surface 28 with respect to the sealing surface 17 and the sliding contact surface 18 and is rotatably fitted to the insertion portion, and this cylinder A stopper 22 fitted into the fitting groove 23 of the other end 1b of the joint body 1 that completely penetrates the cylindrical connector 15 and a second nut portion 25 of the cylindrical connector 15 are connected to the outer peripheral wall. It is formed on, and it is screwed to the female screw portion 30 of the flow path 9 side of the hydraulic device 8 from the threaded portion 27. adult Swivel joints.

With the nut portion 12 formed on the outer peripheral wall of the central portion as a reference , the hose joint 3B is screwed to the one end portion side 1a, and a seal surface is provided to the insertion portion on the other end side. 17B and the sliding contact surface 18 have a pipe-like joint body 1B and a second nut portion 25 that comes into sliding contact with the receiving surface of the nut portion 12, and the sealing surface. have 17B and against the sliding surface 18 sealing surface 26B and the fitting surface 28, and it engages rotatably fitted in the insertion portion and the cylindrical connecting body 15, complete the tube-like connecting member 15 The fitting 22 is inserted into the fitting groove 23 of the other end 1b of the joint body 1B, and the second nut portion 25 of the cylindrical connecting body 15 is formed on the outer peripheral wall and is hydraulically connected. A threaded portion 27 that is threadedly engaged with the female threaded portion 30 on the flow path 9 side of the device 8; It is possible to forcibly press-fit into the insertion end of the flexible hose through the flexible hose 2 into the hose coupling 3B, protruding from the end surface inside the one end 1a of the joint body 1B. An annular insertion head 42 is inserted between the outer peripheral wall of the cylindrical neck 43 and the inner peripheral wall of the one end 1a. The swivel joint is characterized in that a gap portion 44 is formed.