JP5940298B2 - Pipe fittings - Google Patents

Pipe fittings Download PDF

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Publication number
JP5940298B2
JP5940298B2 JP2011290311A JP2011290311A JP5940298B2 JP 5940298 B2 JP5940298 B2 JP 5940298B2 JP 2011290311 A JP2011290311 A JP 2011290311A JP 2011290311 A JP2011290311 A JP 2011290311A JP 5940298 B2 JP5940298 B2 JP 5940298B2
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cylinder member
outer cylinder
cap nut
end side
cylindrical portion
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JP2013139839A (en
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小林　茂
茂 小林
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Bridgestone Corp
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Bridgestone Corp
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本発明は、管体を他の部材に接続するための管体用継手に関する。   The present invention relates to a joint for a tubular body for connecting the tubular body to another member.

エルボ管の一端に袋ナットが取り付けられ、他端に内筒部が相対回転可能に連結されたホース用継手が開示されている（特許文献１参照）。ホースは、内筒部に設けられたホース固定部に加締め接続されるようになっている。   A joint for hose is disclosed in which a cap nut is attached to one end of an elbow pipe and an inner cylinder part is connected to the other end so as to be relatively rotatable (see Patent Document 1). The hose is caulked and connected to a hose fixing part provided in the inner cylinder part.

特開平９−２２９２５９号公報JP-A-9-229259

袋ナットがホースの加締め接続部に隣接している継手の場合、該ホースの加締め加工時に、加締め部材の外径を袋ナットの内径よりも大きくすることにより、袋ナットのホース側への移動を抑制することが可能である。   In the case of a joint in which the cap nut is adjacent to the caulking connection part of the hose, when the hose is caulked, the outer diameter of the caulking member is made larger than the inner diameter of the cap nut to move the cap nut to the hose side. Can be suppressed.

しかしながら、上記した従来例のように、エルボ管と内筒部とを相対回転可能にする場合には、エルボ管に内筒部の長さに応じた直線部分が必要であり、エルボ管の一端から他端（ホースの加締め接続部）までの長さが大きくなる。   However, in the case where the elbow pipe and the inner cylinder portion can be rotated relative to each other as in the conventional example described above, a straight portion corresponding to the length of the inner cylinder portion is required in the elbow pipe, and one end of the elbow pipe is required. To the other end (hose caulking connection) increases.

また袋ナットをエルボ菅に組み付ける際に、エルボ管の他端部（内筒部取付側）から袋ナットを通し、一端まで移動させる構造であるため、エルボ管の外径は、袋ナットの内径よりも小さく設定されている。   In addition, when the cap nut is assembled to the elbow 菅, the outer diameter of the elbow tube is the inner diameter of the cap nut because the cap nut is passed from the other end of the elbow tube (inner cylinder mounting side) to the end. Is set smaller than.

従って、配管施工時にエルボ管の一端側を上方に向けた際には、該一端側に位置する袋ナットが重力によって他端部側へ大きく移動してしまうことがある。そうなると、袋ナットをエルボ管の一端側へ戻す作業が必要となったり、エルボ管と内管部との間に配置されたパッキン等のシール部材が脱落してしまったりする。   Therefore, when one end side of the elbow pipe is directed upward at the time of piping construction, the cap nut positioned on the one end side may move greatly to the other end side due to gravity. If it becomes so, the operation | work which returns a cap nut to the one end side of an elbow pipe will be needed, or seal members, such as packing arrange | positioned between an elbow pipe and an inner pipe part, will drop off.

本発明は、上記事実を考慮して、配管施工性を向上させることを目的とする。   In view of the above facts, an object of the present invention is to improve piping workability.

請求項１の発明は、接続対象への締結手段である袋ナットと、前記袋ナットに挿通されてこの袋ナットと連結され、前記袋ナットへの挿通の先端側から後端側に向かって順に外径が大きくなる段付き形状とされ、最も前記先端側の第１円筒部にＯリングが嵌め込まれ、前記第１円筒部よりも外径が大きい第２円筒部に係合手段が設けられた内筒部材と、一端側から前記内筒部材が差し込まれて前記係合手段と係合し前記内筒部材と周方向に相対回転可能に連結され、他端側に管体を接続可能に構成された外筒部材と、前記外筒部材に設けられ、前記一端側から前記他端側への前記袋ナットの移動を制限する移動制限部と、を有し、前記外筒部材の一端側の内周面は、前記内筒部材の段付き形状に対応して一端側から他端側に向かって順に内径が小さくなる段付き形状とされ、前記外筒部材は、前記内筒部材の前記第１円筒部に対応した外筒部材側第１円筒部、及び前記内筒部材の前記第２円筒部に対応するとともに前記外筒部材側第１円筒部よりも内径が大きい外筒部材側第２円筒部を有し、該外筒部材側第２円筒部と前記外筒部材側第１円筒部との境界部はテーパ形状とされている。 The invention of claim 1 includes a cap nut that is a fastening means to the connection object, and is inserted through the cap nut and connected to the cap nut, and sequentially from the front end side to the rear end side of the insertion into the cap nut. A stepped shape with an increased outer diameter is formed, an O-ring is fitted in the first cylindrical portion on the most distal end side, and an engagement means is provided in a second cylindrical portion having a larger outer diameter than the first cylindrical portion. The inner cylinder member is inserted into the inner cylinder member from one end side, engaged with the engaging means, and connected to the inner cylinder member so as to be relatively rotatable in the circumferential direction, and a tube body can be connected to the other end side. an outer cylinder member being provided in the outer cylinder member, have a, a movement restricting portion for restricting the movement of the cap nut to the other end from the one end, the one end of the outer cylinder member The inner peripheral surface has an inner diameter in order from one end side to the other end side corresponding to the stepped shape of the inner cylindrical member. The outer cylinder member corresponds to the outer cylinder member-side first cylinder part corresponding to the first cylinder part of the inner cylinder member and the second cylinder part of the inner cylinder member. And an outer cylinder member-side second cylindrical portion having an inner diameter larger than that of the outer cylinder member-side first cylindrical portion, and a boundary portion between the outer cylinder member-side second cylindrical portion and the outer cylinder member-side first cylindrical portion. Is tapered.

請求項１に記載の管体用継手では、配管施工時に、袋ナットを接続対象に締結することで、該袋ナットに連結されている内筒部材が、該接続対象に対して固定される。この内筒部材は、外筒部材と周方向に相対回転可能に連結されているので、接続対象への袋ナットの締結が完了した状態で、外筒部材を自在に回転させることができる。従って、外筒部材に接続された管体の曲がりぐせに逆らうことなく、継手の接続作業を行うことができる。   In the pipe joint according to claim 1, the inner cylinder member connected to the cap nut is fixed to the connection target by fastening the cap nut to the connection target at the time of piping construction. Since the inner cylinder member is connected to the outer cylinder member so as to be relatively rotatable in the circumferential direction, the outer cylinder member can be freely rotated in a state where the fastening of the cap nut to the connection target is completed. Therefore, the joint connection work can be performed without countering the bending of the pipe connected to the outer cylinder member.

また配管施工時に、外筒部材の一端側（袋ナット側）を上方に向けた場合でも、該外筒部材に設けられた移動制限部により、重力による該外筒部材の一端側から他端側への袋ナットの移動が制限される。従って、接続対象への袋ナットの締結作業を円滑に行うことができ、また、パッキン等のシール部材の脱落を防止できる。   Further, even when one end side (cap nut side) of the outer cylinder member is directed upward at the time of piping construction, the movement restricting portion provided on the outer cylinder member causes the gravity to move from one end side to the other end side of the outer cylinder member. The movement of the cap nut to is restricted. Therefore, the fastening operation of the cap nut to the connection target can be performed smoothly, and the seal member such as the packing can be prevented from falling off.

このように請求項１に記載の管体用継手によれば、配管施工性を向上させることができる。   Thus, according to the joint for pipes of a 1st aspect, piping workability can be improved.

請求項２の発明は、請求項１に記載の管体用継手において、前記移動制限部は、前記外筒部材の前記一端側の端面であり、該端面の外径は、前記袋ナットの内径よりも大きく設定されている。   According to a second aspect of the present invention, in the pipe joint according to the first aspect, the movement restricting portion is an end face on the one end side of the outer cylinder member, and an outer diameter of the end face is an inner diameter of the cap nut. Is set larger than.

請求項２に記載の管体用継手では、外筒部材の一端側の端面により、袋ナットの移動を制限することができる。このため、簡易な構成で、接続対象への袋ナットの締結作業を円滑に行うことができる。   In the joint for tubular bodies according to claim 2, the movement of the cap nut can be restricted by the end face on the one end side of the outer cylinder member. For this reason, the fastening operation of the cap nut to the connection target can be smoothly performed with a simple configuration.

請求項３の発明は、請求項１又は請求項２に記載の管体用継手において、前記外筒部材が、曲がり管である。   According to a third aspect of the present invention, in the pipe joint according to the first or second aspect, the outer cylinder member is a bent pipe.

上記した従来例では、袋ナットを締結対象に対して締結する際に、エルボ管が袋ナットとの摩擦により共回りすると、該エルボ管の角度位置が変化し、管体の方向が予定した方向からずれてしまう。この状態でエルボ管が締結固定されてしまうと、袋ナットを緩めない限り、管体の方向を所望の方向に修正することは困難であり、袋ナットの締め直しが必要となる。   In the conventional example described above, when the elbow pipe is rotated by friction with the cap nut when the cap nut is fastened to the fastening target, the angular position of the elbow pipe changes, and the direction of the tube body is a predetermined direction. It will deviate from. If the elbow pipe is fastened and fixed in this state, unless the cap nut is loosened, it is difficult to correct the direction of the tube body to a desired direction, and it is necessary to retighten the cap nut.

これに対し、請求項３に記載の管体用継手では、袋ナットを接続対象に締結することで、該袋ナットに連結されている内筒部材が、該接続対象に対して固定される。この内筒部材は、外筒部材と周方向に相対回転可能に連結されているので、接続対象への袋ナットの締結が完了した状態で、内筒部材に対して外筒部材を自在に回転させ、管体の方向を所望の方向に修正することができる。   On the other hand, in the pipe joint according to the third aspect, the inner cylinder member connected to the cap nut is fixed to the connection target by fastening the cap nut to the connection target. Since the inner cylinder member is connected to the outer cylinder member so as to be relatively rotatable in the circumferential direction, the outer cylinder member can freely rotate with respect to the inner cylinder member in a state where the fastening of the cap nut to the connection target is completed. Thus, the direction of the tube can be corrected to a desired direction.

請求項４の発明は、請求項３に記載の管体用継手において、前記外筒部材の前記他端側に差し込まれてこの外筒部材と周方向に相対回転可能に連結されると共に、前記管体が接続可能に構成された第２内筒部材を有している。   According to a fourth aspect of the present invention, in the tubular body joint according to the third aspect, the pipe member is inserted into the other end side of the outer cylinder member and connected to the outer cylinder member so as to be relatively rotatable in the circumferential direction. It has the 2nd inner cylinder member comprised so that a tubular body was connectable.

請求項４に記載の管体用継手では、管体が接続される第２内筒部材が、外筒部材に対して周方向に相対回転可能であるので、配管施工時における管体の捩れを抑制することができる。   In the pipe joint according to claim 4, since the second inner cylinder member to which the pipe is connected is rotatable relative to the outer cylinder member in the circumferential direction, the pipe is twisted at the time of piping construction. Can be suppressed.

請求項５の発明は、請求項１〜請求項４の何れか１項に記載の管体用継手において、前記移動制限部により制限される前記袋ナットの許容移動量が、この袋ナットの幅以下に設定されている。   According to a fifth aspect of the present invention, in the pipe joint according to any one of the first to fourth aspects, the allowable movement amount of the cap nut limited by the movement limiting portion is a width of the cap nut. It is set as follows.

請求項５に記載の管体用継手では、袋ナットの許容移動量が、該袋ナットの幅以下に設定されているので、接続対象への袋ナットの締結作業を、より一層円滑に行うことができる。
請求項６の発明は、請求項１に記載の管体用継手において、前記移動制限部が前記外筒部材の外周面から突出している。 In the joint for tubular bodies according to claim 5, since the allowable movement amount of the cap nut is set to be equal to or less than the width of the cap nut, the fastening operation of the cap nut to the connection target is performed more smoothly. Can do.
According to a sixth aspect of the present invention, in the pipe joint according to the first aspect, the movement restricting portion protrudes from the outer peripheral surface of the outer cylinder member.

以上説明したように、本発明に係る請求項１に記載の管体用継手によれば、配管施工性を向上させることができる、という優れた効果が得られる。   As explained above, according to the joint for pipe bodies according to claim 1 concerning the present invention, the outstanding effect that piping workability can be improved is acquired.

請求項２に記載の管体用継手によれば、簡易な構成で、接続対象への袋ナットの締結作業を円滑に行うことができる、という優れた効果が得られる。   According to the joint for pipes of a 2nd aspect, the outstanding effect that the fastening operation of the cap nut to the candidate for connection can be performed smoothly by simple composition is acquired.

請求項３に記載の管体用継手によれば、接続対象への袋ナットの締結が完了した状態で、管体の方向を所望の方向に修正することができる、という優れた効果が得られる。   According to the joint for tubular bodies according to claim 3, an excellent effect is obtained that the direction of the tubular body can be corrected to a desired direction in a state where the fastening of the cap nut to the connection target is completed. .

請求項４に記載の管体用継手によれば、配管施工時における管体の捩れを抑制することができる、という優れた効果が得られる。   According to the joint for tubular bodies according to claim 4, an excellent effect is obtained that the twist of the tubular body at the time of piping construction can be suppressed.

請求項５に記載の管体用継手によれば、接続対象への袋ナットの締結作業を、より一層円滑に行うことができる、という優れた効果が得られる。   According to the joint for pipes of a 5th aspect, the outstanding effect that the fastening operation of the cap nut to the candidate for connection can be performed still more smoothly is acquired.

図１から図４は、第１実施形態に係り、図１は管体用継手を示す半断面図である。1 to 4 relate to the first embodiment, and FIG. 1 is a half sectional view showing a joint for a tubular body. 袋ナット、内筒部材及び外筒部材の組立て方法を示す分解断面図である。It is a disassembled sectional view which shows the assembly method of a cap nut, an inner cylinder member, and an outer cylinder member. （Ａ）係合手段としての鉤状突起を示す拡大断面図である。（Ｂ）係合手段としての断面半円形状の突起を示す拡大断面図である。(A) It is an expanded sectional view which shows the hook-shaped protrusion as an engaging means. (B) It is an expanded sectional view which shows the protrusion of a cross-sectional semicircle shape as an engaging means. （Ａ）シール部材として、内筒部材の端面にＯリングを配置した例を示す半面図である。（Ｂ）シール部材として、内筒部材の第５円筒部にＯリングを配置した例を示す半面図である。（Ｃ）内筒部材の外周角部にテーパ部を形成した例を示す半断面図である。(A) It is a half view which shows the example which has arrange | positioned O-ring to the end surface of an inner cylinder member as a sealing member. (B) It is a half view which shows the example which has arrange | positioned O-ring to the 5th cylindrical part of an inner cylinder member as a sealing member. (C) It is a half cross-sectional view showing an example in which a tapered portion is formed at the outer peripheral corner of the inner cylinder member. 図５及び図６は、第２実施形態に係り、図５は管体用継手を示す半断面図である。5 and 6 relate to the second embodiment, and FIG. 5 is a half sectional view showing a joint for a tubular body. 接続対象に接続した状態において、外筒部材が回動自在であることを示す斜視図である。It is a perspective view which shows that an outer cylinder member is rotatable in the state connected to the connection object. 図７及び図８は、第３実施形態に係り、図７は管体用継手を示す半断面図である。7 and 8 relate to the third embodiment, and FIG. 7 is a half sectional view showing a joint for a tubular body. 接続対象に接続した状態において、外筒部材が回動自在であると共に、ホースが回動自在であることを示す斜視図である。It is a perspective view which shows that a hose is rotatable while an outer cylinder member is rotatable in the state connected to the connection object.

以下、本発明を実施するための形態を図面に基づき説明する。   Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

［第１実施形態］
図１，図２において、本実施形態に係る管体用継手１０は、例えば洗浄トイレユニットへの給水用のために、管体の一例たるホース１２を接続対象の一例たる給水管１４（図６参照）に接続するための配管部材である。図１において、矢印Ａ方向は管体用継手１０の軸線方向の一方を意味し、矢印Ｂ方向は該軸線方向の他方を意味する。ホース１２は、例えばメッシュ１３により補強されたゴム管であり、可撓性を有している。なお管体は、ホース１２に限られるものではなく、樹脂管等の比較的硬質のものであってもよい。 [First Embodiment]
1 and 2, a pipe joint 10 according to the present embodiment includes, for example, a water supply pipe 14 (FIG. 6) as an object to be connected to a hose 12 as an example of a pipe body for water supply to a cleaning toilet unit. Reference) is a piping member for connection. In FIG. 1, the arrow A direction means one of the axial directions of the pipe joint 10, and the arrow B direction means the other of the axial directions. The hose 12 is a rubber tube reinforced by, for example, a mesh 13 and has flexibility. The tube body is not limited to the hose 12 and may be a relatively hard tube such as a resin tube.

管体用継手１０は、袋ナット１６と、内筒部材２１と、外筒部材２４と、移動制限部２６と、を有している。   The tubular joint 10 includes a cap nut 16, an inner cylinder member 21, an outer cylinder member 24, and a movement restriction portion 26.

袋ナット１６は、接続対象である給水管１４の雄ねじ１４Ａ（図６）への締結手段である。図１に示されるように、この袋ナット１６は、矢印Ａ方向側が開口部１６Ａとなっている。袋ナット１６には、開口部１６Ａから矢印Ｂ方向に所定の深さまで雌ねじ１６Ｂが形成されている。袋ナット１６の開口部１６Ａと反対側（矢印Ｂ方向側）の端部には、雌ねじ１６Ｂの内径よりも小径とされた小径部１６Ｃが形成されている。   The cap nut 16 is a fastening means to the external thread 14A (FIG. 6) of the water supply pipe 14 to be connected. As shown in FIG. 1, the cap nut 16 has an opening 16A on the arrow A direction side. The cap nut 16 is formed with a female screw 16B from the opening 16A to a predetermined depth in the arrow B direction. A small-diameter portion 16C having a smaller diameter than the inner diameter of the female screw 16B is formed at the end of the cap nut 16 opposite to the opening 16A (arrow B direction side).

内筒部材２１は、袋ナット１６に挿通されてこの袋ナット１６と連結される部材であり、全体的に円筒状に形成されている。この内筒部材２１の外周面は、先端側（矢印Ｂ方向側）から後端側（矢印Ａ方向側）に向かって順に外径が大きくなる段付き形状とされている。一例として、内筒部材２１には、先端側から後端側に向かって順に、第１円筒部２１Ａ、第２円筒部２１Ｂ、第３円筒部２１Ｃ、第４円筒部２１Ｄ及びフランジ２１Ｅが形成されている。   The inner cylinder member 21 is a member that is inserted into the cap nut 16 and connected to the cap nut 16 and is formed in a cylindrical shape as a whole. The outer peripheral surface of the inner cylinder member 21 has a stepped shape in which the outer diameter increases in order from the front end side (arrow B direction side) to the rear end side (arrow A direction side). As an example, the inner cylinder member 21 is formed with a first cylindrical portion 21A, a second cylindrical portion 21B, a third cylindrical portion 21C, a fourth cylindrical portion 21D, and a flange 21E in order from the front end side to the rear end side. ing.

第１円筒部２１Ａの外周面には環状溝２１Ｆが形成されており、該環状溝２１ＦにはＯリング２８が嵌め込まれている。この環状溝２１Ｆ及びＯリング２８の数は、１つに限られない。   An annular groove 21F is formed on the outer peripheral surface of the first cylindrical portion 21A, and an O-ring 28 is fitted in the annular groove 21F. The number of the annular grooves 21F and the O-rings 28 is not limited to one.

第２円筒部２１Ｂの外周面には環状溝２１Ｇが形成されており、該環状溝２１ＧにはＣリング３２が嵌め込まれている。このＣリング３２は、内筒部材２１と外筒部材２４とを連結した際に、これらが互いに離脱しないようにするための係合手段の一例である。具体的には、Ｃリング３２は、弾性を有する金属材料を全体としてＣ字形に形成したＣ形止め輪であり、内径及び外径を弾性的に拡縮可能に構成されている。   An annular groove 21G is formed on the outer peripheral surface of the second cylindrical portion 21B, and a C ring 32 is fitted in the annular groove 21G. The C-ring 32 is an example of an engaging means for preventing the inner cylinder member 21 and the outer cylinder member 24 from being separated from each other when the inner cylinder member 21 and the outer cylinder member 24 are connected. Specifically, the C-ring 32 is a C-shaped retaining ring in which a metal material having elasticity is formed in a C shape as a whole, and is configured so that the inner diameter and the outer diameter can be elastically expanded and contracted.

環状溝２１Ｇの直径は、Ｃリング３２の外径を、第２円筒部２１Ｂの外径と同等になるまで縮径させることができるように設定されている。具体的には、環状溝２１Ｇの直径は、Ｃリング３２の外径を、第２円筒部２１Ｂの外径と同等になるまで縮径させたときにおける、該Ｃリング３２の内径未満に設定されている。   The diameter of the annular groove 21G is set so that the outer diameter of the C ring 32 can be reduced until it becomes equal to the outer diameter of the second cylindrical portion 21B. Specifically, the diameter of the annular groove 21G is set to be smaller than the inner diameter of the C ring 32 when the outer diameter of the C ring 32 is reduced to be equal to the outer diameter of the second cylindrical portion 21B. ing.

なお、係合手段はＣリング３２には限られず、Ｅリング（Ｅ形止め輪）であってもよい。また、Ｃリング３２やＥリングを用いずに、図３（Ａ）に示されるように、内筒部材２１の外周面に鉤状突起２１Ｈを設け、該鉤状突起２１Ｈが外筒部材２４の環状溝２４Ｇに係合するようにしてもよい。更に図３（Ｂ）に示されるように、内筒部材２１の外周面に、断面半円形の突起２１Ｊを設け、該突起２１Ｊが外筒部材２４の環状溝２４Ｇに係合するようにしてもよい。このように、係合手段を内筒部材２１に一体的に形成することにより、部品点数を削減することができる。   The engaging means is not limited to the C ring 32, and may be an E ring (E-shaped retaining ring). Further, as shown in FIG. 3A, without using the C ring 32 or the E ring, a hook-like protrusion 21H is provided on the outer peripheral surface of the inner cylinder member 21, and the hook-like protrusion 21H is formed on the outer cylinder member 24. You may make it engage with the annular groove 24G. Further, as shown in FIG. 3B, a protrusion 21J having a semicircular cross section is provided on the outer peripheral surface of the inner cylinder member 21, and the protrusion 21J is engaged with the annular groove 24G of the outer cylinder member 24. Good. Thus, by forming the engaging means integrally with the inner cylinder member 21, the number of parts can be reduced.

図３（Ａ），（Ｂ）に示される例では、内筒部材２１を外筒部材２４に差し込んで連結する際、鉤状突起２１Ｈや断面半円形の突起２１Ｊが環状溝２４Ｇに入り込むまでの間に弾性変形を伴う。従って、図３（Ａ），（Ｂ）に示される構成は、内筒部材２１や外筒部材２４が樹脂製とされる場合に好適である。   In the example shown in FIGS. 3A and 3B, when the inner cylinder member 21 is inserted and connected to the outer cylinder member 24, the hook-shaped protrusion 21H and the protrusion 21J having a semicircular cross section enter the annular groove 24G. With elastic deformation in between. Therefore, the configuration shown in FIGS. 3A and 3B is suitable when the inner cylinder member 21 and the outer cylinder member 24 are made of resin.

図１において、第４円筒部２１Ｄは、袋ナット１６の小径部１６Ｃに挿通される部分である。従って、第４円筒部２１Ｄの外径は、小径部１６Ｃの内径よりも若干小さく設定されている。これにより、袋ナット１６は、第４円筒部２１Ｄの外周面に沿って周方向に回動可能となっている。   In FIG. 1, the fourth cylindrical portion 21 </ b> D is a portion inserted through the small diameter portion 16 </ b> C of the cap nut 16. Therefore, the outer diameter of the fourth cylindrical portion 21D is set slightly smaller than the inner diameter of the small diameter portion 16C. Thereby, the cap nut 16 is rotatable in the circumferential direction along the outer peripheral surface of the fourth cylindrical portion 21D.

フランジ２１Ｅは、袋ナット１６の小径部１６Ｃに係合し、該袋ナット１６が内筒部材２１に対して矢印Ａ方向に離脱することを制限する部位である。従って、フランジ２１Ｅの外径は、袋ナット１６の小径部１６Ｃの内径よりも大きく、かつ雌ねじ１６Ｂの内径よりも小さく設定されている。なお、袋ナット１６の内部におけるフランジ２１Ｅの開口部１６Ａ側（矢印Ａ方向側）の端面には、シール部材としてパッキン３４が配置される。   The flange 21 </ b> E is a part that engages with the small diameter portion 16 </ b> C of the cap nut 16 and restricts the cap nut 16 from being detached in the direction of arrow A with respect to the inner cylinder member 21. Accordingly, the outer diameter of the flange 21E is set larger than the inner diameter of the small diameter portion 16C of the cap nut 16 and smaller than the inner diameter of the female screw 16B. A packing 34 is disposed as a seal member on the end surface of the flange 21E on the opening 16A side (arrow A direction side) inside the cap nut 16.

なお、シール部材はパッキン３４に限られるものではなく、図４（Ａ），（Ｂ）に示されるように、Ｏリング４４，４６を用いてもよい。図４（Ａ）に示される例では、内筒部材２１のフランジ２１Ｅにおける袋ナット１６の開口部１６Ａ側の端面に、環状溝２１Ｋが形成されている。Ｏリング４４は、該環状溝２１Ｋ内に配置されている。このＯリング４４は、給水管１４（図６）へのホース用継手１０の接続時に、該給水管１４の端面（図示せず）に密着するようになっている。   The seal member is not limited to the packing 34, and O-rings 44 and 46 may be used as shown in FIGS. 4 (A) and 4 (B). In the example shown in FIG. 4A, an annular groove 21 </ b> K is formed on the end surface on the opening 16 </ b> A side of the cap nut 16 in the flange 21 </ b> E of the inner cylinder member 21. The O-ring 44 is disposed in the annular groove 21K. The O-ring 44 comes into close contact with an end surface (not shown) of the water supply pipe 14 when the hose joint 10 is connected to the water supply pipe 14 (FIG. 6).

図４（Ｂ）に示される例では、内筒部材２１のフランジ２１Ｅの更に矢印Ａ方向側に第５円筒部２１Ｌが形成されており、該第５円筒部２１Ｌに環状溝２１Ｍが形成されている。Ｏリング４６は、該環状溝２１Ｍに嵌め込まれている。このＯリング４６は、給水管１４（図６）へのホース用継手１０の接続時に、第５円筒部２１Ｌと共に給水管１４の内部に差し込まれ、該給水管１４の内周面に密着するようになっている。   In the example shown in FIG. 4B, a fifth cylindrical portion 21L is formed further on the side of the flange 21E of the inner cylinder member 21 in the direction of arrow A, and an annular groove 21M is formed in the fifth cylindrical portion 21L. Yes. The O-ring 46 is fitted in the annular groove 21M. The O-ring 46 is inserted into the water supply pipe 14 together with the fifth cylindrical portion 21 </ b> L when the hose joint 10 is connected to the water supply pipe 14 (FIG. 6) so as to be in close contact with the inner peripheral surface of the water supply pipe 14. It has become.

また、図４（Ｃ）に示されるように、シール部材によらず、給水管１４の端部形状と内筒部材２１の端部形状とを、相互に対応するようなテーパ形状とすることにより、シール性を持たせてもよい。図４（Ｃ）に示される例では、内筒部材２１の端部の外周角部に、テーパ部２１Ｔが、例えばフランジ２１Ｅに連なるように形成されている。給水管１４の端部の内周角部には、このテーパ部２１Ｔに対応するテーパ部が形成される（図示せず）。   Further, as shown in FIG. 4C, the end shape of the water supply pipe 14 and the end shape of the inner cylinder member 21 are tapered so as to correspond to each other regardless of the seal member. The sealing property may be given. In the example shown in FIG. 4C, a tapered portion 21T is formed at the outer peripheral corner portion of the end portion of the inner cylinder member 21 so as to continue to the flange 21E, for example. A tapered portion corresponding to the tapered portion 21T is formed at an inner peripheral corner portion of the end portion of the water supply pipe 14 (not shown).

次に、外筒部材２４は、一端側から内筒部材２１が差し込まれてこの内筒部材２１と周方向に相対回転可能に連結され、他端側にホース１２を接続可能に構成され、屈曲部のない筒状に形成されている。ここで、外筒部材２４の一端とは矢印Ａ方向側の端部であり、他端とは矢印Ｂ方向側の端部である。外筒部材２４の一端側の内周面は、内筒部材２１の段付き形状に対応して、一端側から他端側に向かって順に内径が小さくなる段付き形状とされている。一例として、外筒部材２４には、一端側から他端側に向かって順に、第３円筒部２４Ｃ、第２円筒部２４Ｂ及び第１円筒部２４Ａが形成されている。   Next, the outer cylinder member 24 is configured such that the inner cylinder member 21 is inserted from one end side and is connected to the inner cylinder member 21 so as to be relatively rotatable in the circumferential direction, and the hose 12 can be connected to the other end side. It is formed in a cylindrical shape with no part. Here, one end of the outer cylinder member 24 is an end portion on the arrow A direction side, and the other end is an end portion on the arrow B direction side. The inner peripheral surface on one end side of the outer cylinder member 24 has a stepped shape corresponding to the stepped shape of the inner cylinder member 21, and the inner diameter decreases in order from the one end side toward the other end side. As an example, the outer cylindrical member 24 is formed with a third cylindrical portion 24C, a second cylindrical portion 24B, and a first cylindrical portion 24A in order from one end side to the other end side.

外筒部材２４の第１円筒部２４Ａ、第２円筒部２４Ｂ及び第３円筒部２４Ｃの内径は、内筒部材２１の第１円筒部２１Ａ、第２円筒部２１Ｂ及び第３円筒部２１Ｃの外径よりも夫々若干大きく設定されている。また外筒部材２４の第１円筒部２４Ａ及び第２円筒部２４Ｂの軸方向長さは、内筒部材２１の第１円筒部２１Ａ及び第２円筒部２１Ｂの軸方向長さと夫々同等とされている。内筒部材２１の第３円筒部２１Ｃは、外筒部材２４の第３円筒部２４Ｃよりも軸方向長さが大きくなっている。この第３円筒部２１Ｃの軸方向長さは、後述する袋ナット１６の許容移動量Ｓに応じて適宜変更される。   The inner diameters of the first cylindrical portion 24A, the second cylindrical portion 24B, and the third cylindrical portion 24C of the outer cylindrical member 24 are outside the first cylindrical portion 21A, the second cylindrical portion 21B, and the third cylindrical portion 21C of the inner cylindrical member 21. Each is set slightly larger than the diameter. The axial lengths of the first cylindrical portion 24A and the second cylindrical portion 24B of the outer cylindrical member 24 are equal to the axial lengths of the first cylindrical portion 21A and the second cylindrical portion 21B of the inner cylindrical member 21, respectively. Yes. The third cylindrical portion 21 </ b> C of the inner cylinder member 21 is longer in the axial direction than the third cylindrical portion 24 </ b> C of the outer cylinder member 24. The axial length of the third cylindrical portion 21C is appropriately changed according to the allowable movement amount S of the cap nut 16 described later.

外筒部材２４の第３円筒部２４Ｃは、Ｃリング３２の導入部である。従って、第３円筒部２４Ｃの内径は、自然状態におけるＣリング３２の外径よりも若干大きく設定されている。第３円筒部２４Ｃと第２円筒部２４Ｂの境界部は、Ｃリング３２の通過を円滑にするためにテーパ形状とされている。   The third cylindrical portion 24 </ b> C of the outer cylinder member 24 is an introduction portion of the C ring 32. Therefore, the inner diameter of the third cylindrical portion 24C is set slightly larger than the outer diameter of the C ring 32 in the natural state. The boundary portion between the third cylindrical portion 24C and the second cylindrical portion 24B is tapered to facilitate the passage of the C-ring 32.

外筒部材２４の第２円筒部２４Ｂは、Ｏリング２８の導入部である。従って、第２円筒部２４Ｂの内径は、環状溝２１Ｆに嵌め込まれたＯリング２８の外径よりも若干大きく設定されている。第２円筒部２４Ｂと第１円筒部２４Ａの境界部は、Ｏリング２８の通過を円滑にするためにテーパ形状とされている。   The second cylindrical portion 24 </ b> B of the outer cylinder member 24 is an introduction portion of the O-ring 28. Accordingly, the inner diameter of the second cylindrical portion 24B is set slightly larger than the outer diameter of the O-ring 28 fitted in the annular groove 21F. The boundary portion between the second cylindrical portion 24B and the first cylindrical portion 24A is tapered to facilitate the passage of the O-ring 28.

また第２円筒部２４Ｂには、環状溝２４Ｇが形成されている。この環状溝２４Ｇは、外筒部材２４に対する内筒部材２１の連結時に、Ｃリング３２と係合する部位である。この連結時に、Ｃリング３２は、環状溝２１Ｇ，２４Ｇの双方に入り込んで係合し、外筒部材２４からの内筒部材２１の離脱を防止するようになっている。またこの連結時に、Ｏリング２８は、内筒部材２１の環状溝２１Ｆと外筒部材２４の第１円筒部２４Ａとに夫々密着して、内筒部材２１と外筒部材２４との間の気密性及び水密性を保持するようになっている。   An annular groove 24G is formed in the second cylindrical portion 24B. The annular groove 24 </ b> G is a part that engages with the C ring 32 when the inner cylinder member 21 is connected to the outer cylinder member 24. At the time of this connection, the C ring 32 enters and engages both the annular grooves 21G and 24G to prevent the inner cylinder member 21 from being detached from the outer cylinder member 24. Further, at the time of this connection, the O-ring 28 is in close contact with the annular groove 21F of the inner cylinder member 21 and the first cylindrical portion 24A of the outer cylinder member 24, respectively, and the airtightness between the inner cylinder member 21 and the outer cylinder member 24 is reached. It is designed to maintain the property and watertightness.

外筒部材２４の他端側には、ホース固定部３６が一体的に形成されている。このホース固定部３６の外径は、ホース１２の中に挿入可能な程度に該ホース１２の内径よりも大きく設定されている。ホース固定部３６の矢印Ｂ方向側の端部の外周面は、ホース１２を接続し易くするためのテーパ部３６Ｂが形成されている。このテーパ部３６Ｂより矢印Ａ方向側の外周面には、環状溝３６Ｆが形成されており、該環状溝３６ＦにＯリング３８が嵌め込まれている。またホース固定部３６の矢印Ａ方向側の端部には、ホース１２の差込み深さを制限する大径部３６Ａが形成されている。   A hose fixing portion 36 is integrally formed on the other end side of the outer cylinder member 24. The outer diameter of the hose fixing portion 36 is set to be larger than the inner diameter of the hose 12 to such an extent that it can be inserted into the hose 12. A tapered portion 36B for facilitating connection of the hose 12 is formed on the outer peripheral surface of the end portion on the arrow B direction side of the hose fixing portion 36. An annular groove 36F is formed on the outer peripheral surface on the arrow A direction side from the tapered portion 36B, and an O-ring 38 is fitted in the annular groove 36F. A large-diameter portion 36A that limits the insertion depth of the hose 12 is formed at the end of the hose fixing portion 36 on the arrow A direction side.

ホース固定部３６の径方向外側には、例えば金属製のホース締付け部材４０が配置され、該ホース締付け部材４０によりホース１２がホース固定部３６に加締め固定されている。ホース固定部３６に対するホース１２の接続は、次のようにして行われる。   For example, a metal hose fastening member 40 is disposed outside the hose fixing portion 36 in the radial direction, and the hose 12 is caulked and fixed to the hose fixing portion 36 by the hose fastening member 40. Connection of the hose 12 to the hose fixing part 36 is performed as follows.

ホース締付け部材４０の初期状態（図示省略）での内径は、ホース１２の外径よりも若干大きく設定されている。このホース締付け部材４０にホース１２を通してから、該ホース１２を、その先端が大径部３６Ａに当接するまでホース固定部３６に矢印Ａ方向に差し込む。次に、ホース締付け部材４０をホース固定部３６の径方向外側に配置して、該ホース締付け部材４０を締め具（図示せず）によって軸方向の複数箇所を部分的に縮径させて加締め部４０Ａを形成する。これにより、ホース１２がホース固定部３６に加締め固定され、ホース固定部３６からのホース１２の抜けを抑制できるようになっている。   The inner diameter of the hose fastening member 40 in the initial state (not shown) is set slightly larger than the outer diameter of the hose 12. After passing the hose 12 through the hose fastening member 40, the hose 12 is inserted into the hose fixing portion 36 in the direction of arrow A until the tip of the hose 12 comes into contact with the large diameter portion 36A. Next, the hose tightening member 40 is disposed outside the hose fixing portion 36 in the radial direction, and the hose tightening member 40 is partially crimped with a fastener (not shown) partially reduced in diameter in the axial direction. Part 40A is formed. As a result, the hose 12 is caulked and fixed to the hose fixing portion 36 so that the hose 12 can be prevented from coming off from the hose fixing portion 36.

なお、ホース固定部３６の構成は、上記構成には限られず、ホース１２を接続して固定できる構造であればよい。またホース固定部３６とホース１２との間の気密性や水密性が確保できれば、Ｏリング３８を用いなくてもよい。この気密性や水密性を高めると共に、ホース１２の抜けを抑制するための手段として、ホース固定部３６の外周面に、ホース１２の内周面に食い込むような、例えば環状の凸部を設けてもよい。   In addition, the structure of the hose fixing | fixed part 36 is not restricted to the said structure, What is necessary is just the structure which can connect and fix the hose 12. FIG. If the airtightness and watertightness between the hose fixing part 36 and the hose 12 can be secured, the O-ring 38 may not be used. As a means for enhancing the air tightness and water tightness and suppressing the hose 12 from coming off, for example, an annular convex portion that bites into the inner peripheral surface of the hose 12 is provided on the outer peripheral surface of the hose fixing portion 36. Also good.

次に、移動制限部２６は、外筒部材２４に設けられ、一端側から他端側への袋ナット１６の移動を制限する部位である。この移動制限部２６は、外筒部材２４の一端側の端面であり、該端面の外径は、袋ナット１６における小径部１６Ｃの内径よりも大きく設定されている。   Next, the movement restricting portion 26 is a part that is provided in the outer cylinder member 24 and restricts the movement of the cap nut 16 from one end side to the other end side. The movement restricting portion 26 is an end face on one end side of the outer cylinder member 24, and the outer diameter of the end face is set larger than the inner diameter of the small diameter portion 16 </ b> C in the cap nut 16.

移動制限部２６により制限される袋ナット１６の許容移動量Ｓは、該移動制限部２６と袋ナット１６との間の軸方向隙間に相当する。この許容移動量Ｓは、袋ナット１６の幅Ｗ以下に設定されている。配管施工性を考慮すると、許容移動量Ｓは、袋ナット１６を内筒部材２１や外筒部材２４に対して周方向に回転可能とするための最小限の隙間を残した上で、なるべく小さく設定することが望ましい。   The allowable movement amount S of the cap nut 16 restricted by the movement restricting portion 26 corresponds to an axial clearance between the movement restricting portion 26 and the cap nut 16. This allowable movement amount S is set to be equal to or smaller than the width W of the cap nut 16. In consideration of piping workability, the allowable movement amount S is as small as possible while leaving a minimum gap for allowing the cap nut 16 to rotate in the circumferential direction with respect to the inner cylinder member 21 and the outer cylinder member 24. It is desirable to set.

なお移動制限部２６は、外筒部材２４の一端側の端面に限られるものではない。外筒部材２４の表面に、該表面から突出する突起や、Ｃリング、カラー等を設けることで、袋ナット１６の移動を制限するようにしてもよい（図示せず）。この場合、外筒部材２４の一端側の円筒部分の外径は、袋ナット１６の小径部１６Ｃの内径より小さくてもよい。   The movement restricting portion 26 is not limited to the end surface on the one end side of the outer cylinder member 24. The movement of the cap nut 16 may be limited (not shown) by providing a protrusion protruding from the surface, a C ring, a collar, or the like on the surface of the outer cylinder member 24. In this case, the outer diameter of the cylindrical portion on one end side of the outer cylinder member 24 may be smaller than the inner diameter of the small diameter portion 16C of the cap nut 16.

（作用）
本実施形態は、上記のように構成されており、以下その作用について説明する。本実施形態に係る管体用継手１０の組立ては、図２に示されるように、まず内筒部材２１の環状溝２１ＦにＯリング２８を嵌め込み、環状溝２１ＧにＣリング３２を嵌め込む。次に、袋ナット１６を、内筒部材２１に対して、第１円筒部２１Ａ側から矢印Ｃ方向に通す。換言すれば、内筒部材２１の第１円筒部２１Ａを袋ナット１６の開口部１６Ａに差し込むようにして、該内筒部材２１を袋ナット１６に挿通する。そして、袋ナット１６の小径部１６Ｃをフランジ２１Ｅに係合させて、内筒部材２１と袋ナット１６とを連結する。 (Function)
This embodiment is configured as described above, and the operation thereof will be described below. As shown in FIG. 2, the tube joint 10 according to the present embodiment is assembled by first fitting the O-ring 28 into the annular groove 21 </ b> F of the inner cylinder member 21 and fitting the C-ring 32 into the annular groove 21 </ b> G. Next, the cap nut 16 is passed through the inner cylinder member 21 in the direction of arrow C from the first cylindrical portion 21A side. In other words, the first cylindrical portion 21 </ b> A of the inner cylinder member 21 is inserted into the opening 16 </ b> A of the cap nut 16, and the inner cylinder member 21 is inserted through the cap nut 16. And the small diameter part 16C of the cap nut 16 is engaged with the flange 21E, and the inner cylinder member 21 and the cap nut 16 are connected.

次に、内筒部材２１を第１円筒部２１Ａ側から外筒部材２４の一端側から差し込み、Ｃリング３２が外筒部材２４の環状溝２４Ｇに係合するまで挿入する。このとき、Ｃリング３２は、外筒部材２４の第３円筒部２４Ｃから第２円筒部２４Ｂにかけて弾性的に縮径されるが、環状溝２４Ｇに入り込むことにより弾性的に拡径する。そしてＣリング３２が環状溝２１Ｇ，２４Ｇの双方に係合することにより、外筒部材２４からの内筒部材２１の離脱が防止される。   Next, the inner cylinder member 21 is inserted from the first cylindrical portion 21 </ b> A side from one end side of the outer cylinder member 24 until the C ring 32 is engaged with the annular groove 24 </ b> G of the outer cylinder member 24. At this time, the C-ring 32 is elastically reduced in diameter from the third cylindrical portion 24C to the second cylindrical portion 24B of the outer cylinder member 24, but is elastically expanded by entering the annular groove 24G. The C-ring 32 is engaged with both the annular grooves 21G and 24G, so that the inner cylinder member 21 is prevented from being detached from the outer cylinder member 24.

またこのとき、Ｏリング２８は、内筒部材２１の環状溝２１Ｆと外筒部材２４の第１円筒部２４Ａとに夫々密着した状態となる。これにより、内筒部材２１と外筒部材２４の間の気密性及び水密性を保持しつつ、内筒部材２１と外筒部材２４との相対回転が許容される。   At this time, the O-ring 28 is in close contact with the annular groove 21 </ b> F of the inner cylinder member 21 and the first cylindrical portion 24 </ b> A of the outer cylinder member 24. Thereby, the relative rotation of the inner cylinder member 21 and the outer cylinder member 24 is permitted while maintaining airtightness and watertightness between the inner cylinder member 21 and the outer cylinder member 24.

このようにして、図１に示されるように、袋ナット１６が内筒部材２１に連結されると共に、外筒部材２４が内筒部材２１に対して周方向に相対回転可能に連結され、管体用継手１０となる。なお、袋ナット１６内には、パッキン３４が配置される。   In this way, as shown in FIG. 1, the cap nut 16 is connected to the inner cylinder member 21 and the outer cylinder member 24 is connected to the inner cylinder member 21 so as to be relatively rotatable in the circumferential direction. It becomes the joint 10 for bodies. A packing 34 is disposed in the cap nut 16.

この管体用継手１０は、配管施工時に、袋ナット１６を接続対象の一例たる給水管１４（図６参照）の雄ねじ１４Ａに締結することで、該給水管１４に接続される。このとき、袋ナット１６に連結されている内筒部材２１は、給水管１４に対して固定される。内筒部材２１は、外筒部材２４と周方向に相対回転可能に連結されているので、給水管１４の雄ねじ１４Ａへの袋ナット１６の締結が完了した状態でも、外筒部材２４を自在に回転させることができる。従って、ホース１２の曲がりぐせに逆らうことなく、継手の接続作業を行うことができる。   The pipe joint 10 is connected to the water supply pipe 14 by fastening a cap nut 16 to a male screw 14A of a water supply pipe 14 (see FIG. 6) as an example of a connection object at the time of piping construction. At this time, the inner cylinder member 21 connected to the cap nut 16 is fixed to the water supply pipe 14. Since the inner cylinder member 21 is connected to the outer cylinder member 24 so as to be relatively rotatable in the circumferential direction, the outer cylinder member 24 can be freely used even when the fastening of the cap nut 16 to the male screw 14A of the water supply pipe 14 is completed. Can be rotated. Therefore, the connection work of the joint can be performed without countering the bending of the hose 12.

また配管施工時に、外筒部材２４の一端側（袋ナット１６側）を上方に向けた場合でも、該外筒部材２４に設けられた移動制限部２６により、重力による該外筒部材２４の一端側から他端側への袋ナット１６の移動が制限される。具体的には、外筒部材２４の一端側の端面により、袋ナット１６の移動を制限することができる。袋ナット１６の許容移動量Ｓは、該袋ナット１６の幅Ｗ以下に設定されている。これにより、重力による外筒部材２４の一端側から他端側へ袋ナット１６が大きく移動することが制限される。このため、簡易な構成で、給水管１４の雄ねじ１４Ａへの袋ナット１６の締結作業を円滑に行うことができ、またパッキン３４の脱落を防止できる。またこれによって、配管施工性を向上させることができる。   Further, even when one end side (cap nut 16 side) of the outer cylinder member 24 is directed upward at the time of piping construction, the movement restricting portion 26 provided on the outer cylinder member 24 causes one end of the outer cylinder member 24 due to gravity. Movement of the cap nut 16 from the side to the other end side is restricted. Specifically, the movement of the cap nut 16 can be restricted by the end surface on the one end side of the outer cylinder member 24. The allowable movement amount S of the cap nut 16 is set to be equal to or less than the width W of the cap nut 16. Thereby, it is restricted that the cap nut 16 largely moves from one end side to the other end side of the outer cylinder member 24 due to gravity. For this reason, with a simple configuration, the fastening operation of the cap nut 16 to the male screw 14A of the water supply pipe 14 can be performed smoothly, and the packing 34 can be prevented from falling off. In addition, this makes it possible to improve the piping workability.

［第２実施形態］
図５において、本実施形態に係る管体用継手２０では、外筒部材２４が曲がり管とされており、具体的には軸方向の中央部２４Ｄが屈曲したエルボ型とされている。外筒部材２４の屈曲角度は、図示の例に限られず、４５°、９０°、１２０°等、任意に設定することが可能である。また外筒部材２４の形状は、エルボ型に限られず、チーズ型（Ｔ型）であってもよい。 [Second Embodiment]
In FIG. 5, in the tubular joint 20 according to the present embodiment, the outer cylinder member 24 is a bent pipe, and specifically, an elbow type in which an axial center portion 24 </ b> D is bent. The bending angle of the outer cylinder member 24 is not limited to the illustrated example, and can be arbitrarily set to 45 °, 90 °, 120 °, or the like. The shape of the outer cylinder member 24 is not limited to the elbow type, and may be a cheese type (T type).

他の部分については、第１実施形態と同様であるので、同一の部分には図面に同一の符号を付し、説明を省略する。   Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

（作用）
本実施形態は、上記のように構成されており、以下その作用について説明する。上記した特許文献に係る従来例では、袋ナットを締結対象に対して締結する際に、エルボ管が袋ナットとの摩擦により共回りすると、該エルボ管の角度位置が変化し、ホースの方向が予定した方向からずれてしまう。この状態でエルボ管が締結固定されてしまうと、袋ナットを緩めない限り、ホースの方向を所望の方向に修正することは困難であり、袋ナットの締め直しが必要となる。 (Function)
This embodiment is configured as described above, and the operation thereof will be described below. In the conventional example according to the above-mentioned patent document, when the elbow pipe is rotated together by friction with the cap nut when the cap nut is fastened to the fastening target, the angular position of the elbow pipe changes and the direction of the hose is changed. Deviation from the planned direction. If the elbow pipe is fastened and fixed in this state, it is difficult to correct the direction of the hose to a desired direction unless the cap nut is loosened, and the cap nut needs to be retightened.

これに対し、本実施形態に係る管体用継手２０では、袋ナット１６を接続対象である給水管１４（図６）の雄ねじ１４Ａに締結することで、該袋ナット１６に連結されている内筒部材２１が、該給水管１４に対して固定される。この内筒部材２１は、外筒部材２４と周方向に相対回転可能に連結されている。従って、図６に示されるように、給水管１４の雄ねじ１４Ａへの袋ナット１６の締結が完了した状態で、内筒部材２１（図５）に対して外筒部材２４を矢印Ｒ１方向に自在に回転させ、ホース１２の方向を所望の方向に修正することができる。またこれによって、配管施工性を向上させることができる。   On the other hand, in the pipe joint 20 according to the present embodiment, the cap nut 16 is connected to the cap nut 16 by fastening the cap nut 16 to the male screw 14A of the water supply pipe 14 (FIG. 6) to be connected. A cylindrical member 21 is fixed to the water supply pipe 14. The inner cylinder member 21 is connected to the outer cylinder member 24 so as to be relatively rotatable in the circumferential direction. Therefore, as shown in FIG. 6, the outer cylinder member 24 can be freely moved in the direction of the arrow R <b> 1 with respect to the inner cylinder member 21 (FIG. 5) in the state where the fastening of the cap nut 16 to the male screw 14 </ b> A of the water supply pipe 14 is completed. The direction of the hose 12 can be corrected to a desired direction. In addition, this makes it possible to improve the piping workability.

［第３実施形態］
図７において、本実施形態に係る管体用継手３０では、外筒部材２４の他端側に第２内筒部材２２が設けられている。この第２内筒部材２２は、外筒部材２４の他端側に差し込まれて該外筒部材２４と周方向に相対回転可能に連結されている。また第２内筒部材２２には、ホース１２が接続可能に構成されている。即ち、外筒部材２４は、第２内筒部材２２を介して、間接的にホース１２を接続可能になっている。 [Third Embodiment]
In FIG. 7, in the pipe joint 30 according to the present embodiment, a second inner cylinder member 22 is provided on the other end side of the outer cylinder member 24. The second inner cylinder member 22 is inserted into the other end side of the outer cylinder member 24 and connected to the outer cylinder member 24 so as to be relatively rotatable in the circumferential direction. Further, the hose 12 is connectable to the second inner cylinder member 22. That is, the outer cylinder member 24 can connect the hose 12 indirectly via the second inner cylinder member 22.

具体的には、第２内筒部材２２は、全体的に円筒状に形成されている。この第２内筒部材２２の外周面は、先端（矢印Ａ方向側）から後端（矢印Ｂ方向側）に向かって順に外径が大きくなる段付き形状とされている。一例として、第２内筒部材２２には、先端側から後端側に向かって順に、第１円筒部２２Ｊ、第２円筒部２２Ｋ及びフランジ２２Ｌが形成されている。   Specifically, the second inner cylinder member 22 is formed in a cylindrical shape as a whole. The outer peripheral surface of the second inner cylindrical member 22 has a stepped shape in which the outer diameter increases in order from the front end (arrow A direction side) to the rear end (arrow B direction side). As an example, the second cylindrical member 22 is formed with a first cylindrical portion 22J, a second cylindrical portion 22K, and a flange 22L in order from the front end side to the rear end side.

第１円筒部２２Ｊの外周面には環状溝２２Ｆが形成されており、該環状溝２２ＦにはＯリング４８が嵌め込まれている。この環状溝２１Ｆ及びＯリング４８の数は、１つに限られない。   An annular groove 22F is formed on the outer peripheral surface of the first cylindrical portion 22J, and an O-ring 48 is fitted in the annular groove 22F. The number of the annular grooves 21F and the O-rings 48 is not limited to one.

第２円筒部２２Ｋの外周面には環状溝２２Ｈが形成されており、該環状溝２２ＨにはＣリング４２が嵌め込まれている。このＣリング４２は、第２内筒部材２２と外筒部材２４とを連結した際に、これらが互いに離脱しないようにするための係合手段の一例であり、内筒部材２１に設けられるＣリング３２と同様の部材である。   An annular groove 22H is formed on the outer peripheral surface of the second cylindrical portion 22K, and a C-ring 42 is fitted into the annular groove 22H. The C-ring 42 is an example of an engaging means for preventing the second inner cylinder member 22 and the outer cylinder member 24 from being separated from each other when the second inner cylinder member 22 and the outer cylinder member 24 are connected to each other. This is the same member as the ring 32.

環状溝２２Ｈの直径は、Ｃリング４２の外径を、第２円筒部２２Ｋの外径と同等になるまで縮径させることができるように設定されている。具体的には、環状溝２２Ｈの直径は、Ｃリング４２の外径を、第２円筒部２２Ｋの外径と同等になるまで縮径させたときにおける、該Ｃリング４２の内径未満に設定されている。なお、係合手段はＣリング４２には限られず、Ｅリング（Ｅ形止め輪）であってもよい。また図３（Ａ），（Ｂ）に示される鉤状突起２１Ｈや断面半円形の突起２１Ｊに相当する形状を、第２内筒部材２２の外周面に設けてもよい。   The diameter of the annular groove 22H is set so that the outer diameter of the C ring 42 can be reduced until it becomes equal to the outer diameter of the second cylindrical portion 22K. Specifically, the diameter of the annular groove 22H is set to be less than the inner diameter of the C-ring 42 when the outer diameter of the C-ring 42 is reduced to be equal to the outer diameter of the second cylindrical portion 22K. ing. The engaging means is not limited to the C ring 42 but may be an E ring (E type retaining ring). 3A and 3B may be provided on the outer peripheral surface of the second inner cylindrical member 22 so as to correspond to the hook-like protrusion 21H and the protrusion 21J having a semicircular cross section.

第２内筒部材２２の後端側には、ホース固定部３６が一体的に形成されている。ホース固定部３６の構成は、第１実施形態と同様である。   A hose fixing part 36 is integrally formed on the rear end side of the second inner cylinder member 22. The configuration of the hose fixing part 36 is the same as that of the first embodiment.

外筒部材２４の他端側の内周面は、第２内筒部材２２の段付き形状に対応して、他端側から一端側に向かって順に内径が小さくなる段付き形状とされている。一例として、外筒部材２４には、他端側から一端側に向かって順に、第３円筒部２４Ｌ、第２円筒部２４Ｋ及び第１円筒部２４Ｊが形成されている。   The inner peripheral surface of the outer cylinder member 24 on the other end side has a stepped shape corresponding to the stepped shape of the second inner cylinder member 22 so that the inner diameter decreases in order from the other end side toward the one end side. . As an example, the outer cylinder member 24 is formed with a third cylindrical portion 24L, a second cylindrical portion 24K, and a first cylindrical portion 24J in order from the other end side toward the one end side.

外筒部材２４の第１円筒部２４Ｊ、第２円筒部２４Ｋ及び第３円筒部２４Ｌの内径は、第２内筒部材２２の第１円筒部２２Ｊ、第２円筒部２２Ｋ及び第３円筒部２２Ｌの外径よりも夫々若干大きく設定されている。また外筒部材２４の第１円筒部２４Ｊの軸方向長さは、第２内筒部材２２の第１円筒部２２Ｊの軸方向長さと同等とされている。外筒部材２４の第２円筒部２４Ｋ及び第３円筒部２４Ｌの軸方向長さの合計は、第２内筒部材２２の第２円筒部２２Ｋの軸方向長さと同等とされている。   The inner diameters of the first cylindrical portion 24J, the second cylindrical portion 24K, and the third cylindrical portion 24L of the outer cylindrical member 24 are the same as the first cylindrical portion 22J, the second cylindrical portion 22K, and the third cylindrical portion 22L of the second inner cylindrical member 22. The outer diameter of each is set slightly larger. The axial length of the first cylindrical portion 24J of the outer cylindrical member 24 is equivalent to the axial length of the first cylindrical portion 22J of the second inner cylindrical member 22. The total axial length of the second cylindrical portion 24K and the third cylindrical portion 24L of the outer cylinder member 24 is equivalent to the axial length of the second cylindrical portion 22K of the second inner cylindrical member 22.

外筒部材２４の第３円筒部２４Ｌは、Ｃリング４２の導入部である。従って、第３円筒部２４Ｌの内径は、自然状態におけるＣリング４２の外径よりも若干大きく設定されている。第３円筒部２４Ｌと第２円筒部２４Ｋの境界部は、Ｃリング４２の通過を円滑にするためにテーパ形状とされている。なお、第２内筒部材２２のフランジ２２Ｌの外径は、外筒部材２４の第３円筒部２４Ｌの内径よりも大きく設定されている。これにより、第２内筒部材２２を外筒部材２４の他端側に差し込んで連結した際に、フランジ２２Ｌが外筒部材２４の他端側の端面に当接又は近接対向するようになっている。   The third cylindrical portion 24L of the outer cylinder member 24 is an introduction portion of the C ring 42. Accordingly, the inner diameter of the third cylindrical portion 24L is set slightly larger than the outer diameter of the C-ring 42 in the natural state. A boundary portion between the third cylindrical portion 24L and the second cylindrical portion 24K is tapered to facilitate passage of the C-ring 42. The outer diameter of the flange 22L of the second inner cylinder member 22 is set larger than the inner diameter of the third cylinder portion 24L of the outer cylinder member 24. Accordingly, when the second inner cylinder member 22 is inserted and connected to the other end side of the outer cylinder member 24, the flange 22 </ b> L comes into contact with or is opposed to the end surface on the other end side of the outer cylinder member 24. Yes.

外筒部材２４の第２円筒部２４Ｋは、Ｏリング４８の導入部である。従って、第２円筒部２４Ｋの内径は、環状溝２２Ｆに嵌め込まれたＯリング４８の外径よりも若干大きく設定されている。第２円筒部２４Ｋと第１円筒部２４Ｊの境界部は、Ｏリング４８の通過を円滑にするためにテーパ形状とされている。   The second cylindrical portion 24K of the outer cylinder member 24 is an introduction portion of the O-ring 48. Therefore, the inner diameter of the second cylindrical portion 24K is set slightly larger than the outer diameter of the O-ring 48 fitted in the annular groove 22F. A boundary portion between the second cylindrical portion 24K and the first cylindrical portion 24J has a tapered shape in order to facilitate the passage of the O-ring 48.

また第２円筒部２４Ｋには、環状溝２４Ｈが形成されている。この環状溝２４Ｈは、外筒部材２４に対する第２内筒部材２２の連結時に、Ｃリング４２と係合する部位である。この連結時に、Ｃリング４２は、環状溝２２Ｈ，２４Ｈの双方に入り込んで係合し、外筒部材２４からの第２内筒部材２２の離脱を防止するようになっている。またこの連結時に、Ｏリング４８は、第２内筒部材２２の環状溝２２Ｆと外筒部材２４の第１円筒部２４Ｊとに夫々密着して、第２内筒部材２２と外筒部材２４との間の気密性及び水密性を保持するようになっている。   An annular groove 24H is formed in the second cylindrical portion 24K. The annular groove 24 </ b> H is a portion that engages with the C ring 42 when the second inner cylinder member 22 is connected to the outer cylinder member 24. At the time of this connection, the C-ring 42 enters and engages both the annular grooves 22H and 24H to prevent the second inner cylinder member 22 from being detached from the outer cylinder member 24. Further, at the time of this connection, the O-ring 48 is in close contact with the annular groove 22F of the second inner cylinder member 22 and the first cylinder portion 24J of the outer cylinder member 24, and the second inner cylinder member 22 and the outer cylinder member 24 Airtightness and watertightness between the two are maintained.

他の部分については、第１実施形態又は第２実施形態と同様であるので、同一の部分には図面に同一の符号を付し、説明を省略する。   Since other parts are the same as those in the first embodiment or the second embodiment, the same parts are denoted by the same reference numerals and the description thereof is omitted.

（作用）
本実施形態は、上記のように構成されており、以下その作用について説明する。図８において、本実施形態に係る管体用継手３０では、第２実施形態と同様に、給水管１４の雄ねじ１４Ａへの袋ナット１６の締結が完了した状態で、内筒部材２１（図７）に対して外筒部材２４を矢印Ｒ１方向に自在に回転させ、ホース１２の方向を所望の方向に修正することができる。 (Function)
This embodiment is configured as described above, and the operation thereof will be described below. 8, in the tubular body joint 30 according to the present embodiment, the inner cylinder member 21 (FIG. 7) in a state where the fastening of the cap nut 16 to the male screw 14 </ b> A of the water supply pipe 14 is completed as in the second embodiment. ) To freely rotate the outer cylinder member 24 in the direction of the arrow R1 to correct the direction of the hose 12 to a desired direction.

本実施形態では、これに加えて、外筒部材２４の他端側に差し込まれて連結される第２内筒部材２２が、該外筒部材２４に対して周方向（図８の矢印Ｒ２方向）に相対回転可能となっている。この第２内筒部材２２には、ホース１２が接続されている。従って、配管施工時にホース１２を矢印Ｒ２方向に適宜回転させて、ホース１２の捩れを抑制することができる。   In the present embodiment, in addition to this, the second inner cylinder member 22 inserted and connected to the other end side of the outer cylinder member 24 is circumferential with respect to the outer cylinder member 24 (in the direction of arrow R2 in FIG. 8). ) Relative rotation is possible. The hose 12 is connected to the second inner cylinder member 22. Therefore, the hose 12 can be appropriately rotated in the direction of the arrow R2 at the time of piping construction to suppress the hose 12 from being twisted.

このように、本実施形態では、内筒部材２１、外筒部材２４及び第２内筒部材２２を互いに相対回転可能に構成することにより、各部材の角度位置の自由度を高めて、配管施工性をより一層向上させることができる。   As described above, in this embodiment, the inner cylinder member 21, the outer cylinder member 24, and the second inner cylinder member 22 are configured to be relatively rotatable with each other, thereby increasing the degree of freedom of the angular position of each member. The property can be further improved.

１０ 管体用継手
１２ ホース（管体）
１４ 給水管（接続対象）
１６ 袋ナット
２０ 管体用継手
２１ 内筒部材
２１Ａ 第１円筒部
２１Ｂ 第２円筒部
２２ 第２内筒部材
２４ 外筒部材
２６ 移動制限部
３０ 管体用継手
３２ Ｃリング（係合手段）
Ｓ 許容移動量
Ｗ 袋ナットの幅 10 Joint for pipe body 12 Hose (tubular body)
14 Water supply pipe (target for connection)
16 Cap nut 20 Joint for pipe body 21 Inner cylinder member
21A 1st cylindrical part
21B 2nd cylindrical part 22 2nd inner cylinder member 24 Outer cylinder member 26 Movement restriction part 30 Joint for pipe bodies
32 C-ring (engaging means)
S Allowable travel W Cap nut width

Claims (6)

接続対象への締結手段である袋ナットと、
前記袋ナットに挿通されてこの袋ナットと連結され、前記袋ナットへの挿通の先端側から後端側に向かって順に外径が大きくなる段付き形状とされ、最も前記先端側の第１円筒部にＯリングが嵌め込まれ、前記第１円筒部よりも外径が大きい第２円筒部に係合手段が設けられた内筒部材と、
一端側から前記内筒部材が差し込まれて前記係合手段と係合し前記内筒部材と周方向に相対回転可能に連結され、他端側に管体を接続可能に構成された外筒部材と、
前記外筒部材に設けられ、前記一端側から前記他端側への前記袋ナットの移動を制限する移動制限部と、
を有し、
前記外筒部材の一端側の内周面は、前記内筒部材の段付き形状に対応して一端側から他端側に向かって順に内径が小さくなる段付き形状とされ、
前記外筒部材は、前記内筒部材の前記第１円筒部に対応した外筒部材側第１円筒部、及び前記内筒部材の前記第２円筒部に対応するとともに前記外筒部材側第１円筒部よりも内径が大きい外筒部材側第２円筒部を有し、
該外筒部材側第２円筒部と前記外筒部材側第１円筒部との境界部はテーパ形状とされている管体用継手。 A cap nut as a fastening means to the connection object;
It is inserted into the cap nut and connected to the cap nut, and has a stepped shape in which the outer diameter increases in order from the front end side to the rear end side of the insertion into the cap nut. An inner ring member in which an O-ring is fitted in a part, and an engagement means is provided in a second cylindrical part having a larger outer diameter than the first cylindrical part;
An outer cylinder member configured such that the inner cylinder member is inserted from one end side, is engaged with the engagement means, is connected to the inner cylinder member so as to be relatively rotatable in the circumferential direction, and a tubular body can be connected to the other end side. When,
A movement restricting portion provided on the outer cylinder member for restricting movement of the cap nut from the one end side to the other end side;
I have a,
The inner peripheral surface on one end side of the outer cylinder member has a stepped shape in which the inner diameter decreases in order from one end side toward the other end side in correspondence with the stepped shape of the inner cylinder member.
The outer cylinder member corresponds to the outer cylinder member side first cylindrical part corresponding to the first cylindrical part of the inner cylinder member and the second cylindrical part of the inner cylinder member, and the outer cylinder member side first. An outer cylinder member side second cylindrical portion having an inner diameter larger than that of the cylindrical portion;
A joint for a tubular body in which a boundary portion between the outer cylindrical member side second cylindrical portion and the outer cylindrical member side first cylindrical portion is tapered . 前記移動制限部は、前記外筒部材の前記一端側の端面であり、
該端面の外径は、前記袋ナットの内径よりも大きく設定されている請求項１に記載の管体用継手。 The movement restricting portion is an end face on the one end side of the outer cylinder member,
The joint for pipe bodies according to claim 1, wherein an outer diameter of the end face is set larger than an inner diameter of the cap nut. 前記外筒部材は、曲がり管である請求項１又は請求項２に記載の管体用継手。   The joint for tubular bodies according to claim 1 or 2, wherein the outer cylinder member is a bent pipe. 前記外筒部材の前記他端側に差し込まれてこの外筒部材と周方向に相対回転可能に連結されると共に、前記管体が接続可能に構成された第２内筒部材を有する請求項３に記載の管体用継手。   4. A second inner cylinder member configured to be connected to the outer cylinder member so as to be relatively rotatable in the circumferential direction while being inserted into the other end side of the outer cylinder member and to be connected to the tubular body. The joint for pipes described in 1. 前記移動制限部により制限される前記袋ナットの許容移動量は、この袋ナットの幅以下に設定されている請求項１〜請求項４の何れか１項に記載の管体用継手。   The joint for pipe bodies according to any one of claims 1 to 4, wherein an allowable movement amount of the cap nut limited by the movement limiting portion is set to be equal to or less than a width of the cap nut. 前記移動制限部は、前記外筒部材の外周面から突出している請求項１に記載の管体用継手。   The pipe joint according to claim 1, wherein the movement restricting portion protrudes from an outer peripheral surface of the outer cylinder member.
JP2011290311A 2011-12-29 2011-12-29 Pipe fittings Expired - Fee Related JP5940298B2 (en)

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JPS6032471Y2 (en) * 1981-11-27 1985-09-27 株式会社 冨士精密製作所 Threaded leakproof pipe fittings
US4804206A (en) * 1987-10-13 1989-02-14 Dover Corporation Swivel construction and method of making the same
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JP3025738U (en) * 1995-12-12 1996-06-25 前田バルブ工業株式会社 Polyethylene pipe fittings
JP4120727B2 (en) * 1998-09-22 2008-07-16 Ｎｏｋ株式会社 Quick connector
JP4988999B2 (en) * 2001-08-20 2012-08-01 株式会社タブチ Expansion joints
JP4081296B2 (en) * 2002-05-01 2008-04-23 株式会社堀場製作所 Fitting for pipe connection
JP3932509B2 (en) * 2002-08-29 2007-06-20 ニッタ・ムアー株式会社 Pipe fitting
JP2007309414A (en) * 2006-05-18 2007-11-29 Kubota Ci Kk Pipe joint
JP2011169408A (en) * 2010-02-18 2011-09-01 Abc Coupling Kogyo Co Ltd Rotary joint and swivel elbow using the same

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