JP2014047888A - Plug-in joint structure - Google Patents

Plug-in joint structure Download PDF

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JP2014047888A
JP2014047888A JP2012193344A JP2012193344A JP2014047888A JP 2014047888 A JP2014047888 A JP 2014047888A JP 2012193344 A JP2012193344 A JP 2012193344A JP 2012193344 A JP2012193344 A JP 2012193344A JP 2014047888 A JP2014047888 A JP 2014047888A
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slit
outer pipe
pipe
closed
peripheral wall
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JP5967365B2 (en
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Toshimasa Tanaka
寿昌 田中
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Mitsubishi Motors Corp
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Mitsubishi Motors Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/06—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends
    • F16L21/065—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends tightened by tangentially-arranged threaded pins

Abstract

PROBLEM TO BE SOLVED: To provide a plug-in joint structure having a simple configuration in which a fastening power between two pipes and a sealability between the two pipes can be assured.SOLUTION: A plug-in joint structure of the present invention is constructed such that an end part peripheral wall of an outer pipe 2 is provided with a slit 10 having closed both ends in such a way that it may extend along an axial direction of the outer pipe within a fastening region X where the pipe is fastened with a clamp member 3, and further provided with a disconnection slit 9 released at the end part of the outer pipe overlapped with a middle part of the closed slit. With this configuration, upon fastening it with a clamp member, the peripheral wall part having the released slit and the closed slits is deformed into a small diameter side to cause an end inner surface of the outer pipe to be closely contacted with the end outer surface of the inner pipe. The annular peripheral wall portion adjacent to the closed slits is bulged outwardly to generate a clearance. However, the closed slits are covered from outside by the clamp member to have no place to go, so that no leakage of oil from the closed slits to outside occurs.

Description

本発明は、パイプ同士をクランプ部材で接続する差込み継手構造に関する。   The present invention relates to an insertion joint structure in which pipes are connected by a clamp member.

ガスや液体など流体の輸送には、長尺な配管が用いられる。こうした配管のパイプ端同士の接続には、インナ側となるインナパイプの端部をアウタ側となるアウタパイプの端部に差込み、差込んだアウタパイプの外周面の周りをバンド形のクランプ部材で締付けて固定する、差込み継手構造と呼ばれる構造が用いられる。
通常、差込み継手構造では、アウタパイプの端部周壁には、アウタパイプ端で開放して、アウタパイプの軸心方向に延びる直線状の開放スリットが設けられる。つまり、クランプ部材の締付け力が加わると、アウタパイプの端部周壁の全体が、径の小さくなる側（縮径側）に変形して、アウタパイプの端部内面をインナパイプの端部外面に密接させ、パイプ端部間を締結する構造としてある（特許文献１を参照）。 Long pipes are used for transporting fluids such as gas and liquid. To connect the pipe ends of such piping, insert the end of the inner pipe on the inner side into the end of the outer pipe on the outer side, and tighten around the outer peripheral surface of the inserted outer pipe with a band-shaped clamp member. A fixed structure called a plug-in joint structure is used.
Usually, in the insertion joint structure, a linear opening slit that extends in the axial direction of the outer pipe is provided on the outer peripheral wall of the end portion of the outer pipe. That is, when the clamping force of the clamp member is applied, the entire outer peripheral wall of the outer pipe is deformed to the side with a smaller diameter (reduced diameter side), and the inner surface of the outer pipe end is brought into close contact with the outer surface of the inner pipe end. In this structure, the pipe ends are fastened (see Patent Document 1).

実開昭６０−２９９８８公報Japanese Utility Model Publication No. 60-29988

差込み継手構造では、締結力の確保と、シール性の確保との双方が求められつつある。
ところが、差込み継手構造は、アウタパイプの開放スリットは、インナパイプと締結させるために必須であるものの、同開放スリットの影響でパイプ間のシール性が損なわれやすくなる問題がある。
すなわち、アウタパイプの開放スリットの有る端部は、径方向に変形可能である。しかし、開放スリットの閉じた端と隣接するアウタパイプの端部の周壁部分は、環状のままなので、径方向には変形可能ではない。このため、クランプ部材でアウタパイプの端部を締め付けたとき、開放スリット近傍の環状の周壁部分においては、外側へ隆起する部分が生じて、インナパイプとアウタパイプ間に隙間をもたらす。そのため、インナパイプやアウタパイプ内を流れる流体が、この隙間、開放スリット内を通じ、アウタパイプ端から外部に漏洩してしまうことがある。 In the insertion joint structure, both securing of fastening force and securing of sealing performance are being demanded.
However, in the plug joint structure, although the open slit of the outer pipe is indispensable for fastening with the inner pipe, there is a problem that the sealing performance between the pipes is easily impaired due to the influence of the open slit.
That is, the end portion of the outer pipe having the open slit can be deformed in the radial direction. However, since the peripheral wall portion of the end portion of the outer pipe adjacent to the closed end of the open slit remains annular, it cannot be deformed in the radial direction. For this reason, when the end portion of the outer pipe is tightened by the clamp member, a portion protruding outward is generated in the annular peripheral wall portion in the vicinity of the open slit, and a gap is provided between the inner pipe and the outer pipe. Therefore, the fluid flowing in the inner pipe or the outer pipe may leak outside from the outer pipe end through the gap and the open slit.

そこで、本発明の目的は、簡単な構造で、パイプ間の締結力とシール性の確保が可能な差込み継手構造を提供することにある。   Therefore, an object of the present invention is to provide an insertion joint structure that can secure a fastening force between pipes and a sealing property with a simple structure.

請求項１に記載の発明は、アウタパイプの端部周壁が、クランプ部材で締付けられる締付領域内で、アウタパイプの軸心方向に沿って延びるように配置された、両端の閉じた閉塞スリットと、閉塞スリットの近傍に位置して閉塞スリットと並行に配置され、アウタパイプ端で開放して閉塞スリットの中途部分とオーバラップするまで延びる開放スリットとを有するものとした。   According to the first aspect of the present invention, the closed end slits of the outer pipe are arranged so as to extend along the axial direction of the outer pipe within the tightening region where the outer pipe is tightened by the clamp member; It was located in the vicinity of the closing slit and was arranged in parallel with the closing slit, and had an open slit that opened at the end of the outer pipe and extended to overlap with the middle part of the closing slit.

同構成により、インナパイプの端部をアウタパイプの端部に差込み、差込んだアウタパイプの外周面の周りをクランプ部材で締付けると、開放スリットの有る周壁部分は、径の小さくなる側（縮径側）に変形して、アウタパイプの端部内面をインナパイプの端部外面に密接させる。と共に開放スリットの閉じた端の有る周壁部分も、閉塞スリットの形成により、径の小さくなる側（縮径側）に変形して、同様にアウタパイプの端部内面をインナパイプの端部外面に密接させ、パイプ間の締結力を確保する。一方、閉塞スリットのアウタパイプの端部とは反対側の端と隣接する環状の周壁部分は、クランプ部材の締付けにより、外側へ隆起する部分が生じ、インナパイプとアウタパイプ間に隙間をもたらすが、閉塞スリットの全体は、外側からバンド部材で覆われ、行き場の無い空間になるため、隙間からパイプ内の流体が閉塞スリット内へ漏れたとしても、閉塞スリットから外部へ漏れることはない。つまり、パイプ間のシール性は確保される。   With this configuration, when the end of the inner pipe is inserted into the end of the outer pipe and the periphery of the inserted outer pipe is tightened with a clamp member, the peripheral wall portion with the open slit becomes the smaller diameter side (the reduced diameter side) And the inner surface of the end portion of the outer pipe is brought into close contact with the outer surface of the end portion of the inner pipe. At the same time, the peripheral wall portion having the closed end of the open slit is also deformed to the smaller diameter side (reduced diameter side) due to the formation of the closing slit, and the inner surface of the end portion of the outer pipe is similarly brought into close contact with the outer surface of the inner pipe end portion And secure the fastening force between the pipes. On the other hand, the annular peripheral wall portion adjacent to the end of the closing slit opposite to the end of the outer pipe is raised to the outside by tightening the clamp member, which causes a gap between the inner pipe and the outer pipe. Since the entire slit is covered with a band member from the outside and becomes a space without a place to go, even if fluid in the pipe leaks from the gap into the closing slit, it does not leak from the closing slit to the outside. That is, the sealing performance between the pipes is ensured.

請求項２に記載の発明は、さらに効果的にパイプ間の締結力とシール性とが増せるよう、閉塞スリットを、開放スリットを挟んで両側にそれぞれ配置するものとした。
請求項３に記載の発明は、同じく、閉塞スリットを締付領域内の軸方向に渡り配置し、開放スリットを、アウタパイプ端と反対側の閉じた端が、閉塞スリットのほぼ長さ方向中央域に配置されるものとした。 According to the second aspect of the present invention, the closing slits are arranged on both sides of the opening slit so that the fastening force between the pipes and the sealing performance can be more effectively increased.
In the third aspect of the invention, similarly, the closing slit is arranged in the axial direction in the tightening region, and the opening slit is arranged so that the closed end opposite to the outer pipe end is substantially in the central region in the length direction of the closing slit. To be placed in.

請求項４に記載の発明は、開放スリットの閉じた端付近が、変形しやすくなるよう、開放スリットの、アウタパイプ端と反対側の閉じた端は、当該開放スリットのスリット幅よりも大きな切欠部を有するものとした。   According to a fourth aspect of the present invention, the closed end of the open slit opposite to the outer pipe end is larger than the slit width of the open slit so that the vicinity of the closed end of the open slit is easily deformed. It was supposed to have.

請求項１の発明によれば、インナパイプの端部をアウタパイプの端部に差込み、差込んだアウタパイプの外周面の周りをクランプ部材で締付けると、開放スリットの有る周壁部分は、径の小さくなる側に変形して、アウタパイプの端部内面をインナパイプの端部外面に密接させる。と共に開放スリットの閉じた端の有る周壁部分も、閉塞スリットにより、径の小さくなる側に変形して、同様にアウタパイプの端部内面をインナパイプの端部外面に密接させる。また閉塞スリットのアウタパイプ端とは反対側の環状の周壁部分では、クランプ部材の締付けにより、外側へ隆起する部分が生じ、インナパイプとアウタパイプ間に隙間をもたらすものの、閉塞スリットの全体は、外側からクランプ部材で覆われ、行き場の無い空間になるため、パイプ内の流体が閉塞スリットから外部へ流体が漏れることはない。   According to the first aspect of the present invention, when the end portion of the inner pipe is inserted into the end portion of the outer pipe, and the periphery of the inserted outer pipe is tightened with the clamp member, the peripheral wall portion having the open slit becomes smaller in diameter. The inner surface of the end of the outer pipe is brought into close contact with the outer surface of the end of the inner pipe. At the same time, the peripheral wall portion having the closed end of the open slit is also deformed by the closing slit to the side having a smaller diameter, and the inner surface of the end portion of the outer pipe is also brought into close contact with the outer surface of the end portion of the inner pipe. In addition, in the annular peripheral wall portion on the opposite side of the outer pipe end of the closing slit, a portion that protrudes to the outside is generated by tightening the clamp member, and a gap is formed between the inner pipe and the outer pipe. Since the space is covered with the clamp member and has no place to go, the fluid in the pipe does not leak from the closing slit to the outside.

それ故、閉塞スリット、開放スリットを組合わせた簡単な構造で、パイプ間における締結力とパイプ間におけるシール性を十分に確保することができる。
請求項２，３の発明によれば、効果的にパイプ間の締結力とシール性とを増すことができる。
請求項４の発明によれば、閉塞スリットに対し、局所ながらも、できるだけ接近する開放スリットとすることができ、容易に開放スリットの端付近を変形しやすくでき、容易にパイプ間の締結性、シール性を向上させることができる。 Therefore, it is possible to sufficiently secure the fastening force between the pipes and the sealing performance between the pipes with a simple structure combining the closing slit and the opening slit.
According to the second and third aspects of the invention, the fastening force between the pipes and the sealing performance can be effectively increased.
According to the invention of claim 4, it can be an open slit that is as close as possible to the closed slit, but can be easily deformed near the end of the open slit, and can be easily fastened between pipes. Sealability can be improved.

本発明の第１の実施形態に係る差込み継手構造の全体を示す斜視図。The perspective view which shows the whole plug-in coupling structure which concerns on the 1st Embodiment of this invention. 同差込み継手構造の各部を示す分解斜視図。The disassembled perspective view which shows each part of the insertion joint structure. インナパイプとアウタパイプとをバンド形のクランプ部材でクランプしたときの各部の挙動を説明するための断面図。Sectional drawing for demonstrating the behavior of each part when an inner pipe and an outer pipe are clamped with a band-shaped clamp member. 本発明の第２の実施形態の要部を示す断面図。Sectional drawing which shows the principal part of the 2nd Embodiment of this invention. 本発明の第３の実施形態の要部を示す断面図。Sectional drawing which shows the principal part of the 3rd Embodiment of this invention.

以下、本発明を図１ないし図３に示す第１の実施形態にもとづいて説明する。
図１は本発明を適用した、例えばガスの流れる配管における差込み継手構造の全体図を示し、図２は同継手構造を分解した分解図を示している。
図中１はインナパイプ、２はアウタパイプ、３はバンド形のクランプ部材を示している。インナパイプ１、アウタパイプ２、クランプ部材３は、いずれも配管内を流れる流体、ここではガスに対応した部材、例えばステンレス鋼で形成されたＳＵＳ製が用いられている。 The present invention will be described below based on the first embodiment shown in FIGS.
FIG. 1 shows an overall view of an insertion joint structure to which the present invention is applied, for example, in a pipe through which gas flows, and FIG. 2 shows an exploded view of the joint structure.
In the figure, 1 is an inner pipe, 2 is an outer pipe, and 3 is a band-shaped clamp member. The inner pipe 1, the outer pipe 2, and the clamp member 3 are all members that correspond to a fluid flowing in the pipe, in this case, a gas, for example, SUS made of stainless steel.

アウタパイプ２は、インナパネル１の径寸法よりも若干、大きく形成されていて、インナパイプ１の端部がアウタパイプ２の端部内へ差込める。ちなみに、アウタパイプ２は、端部だけをインナパイプ１の径寸法よりも大きくしたものでもよい。
クランプ部材３は、帯形の薄肉部材で形成されたほぼＣ形のバンド部４と、同バンド部４の両端部に形成された一対の座部５と、同座部５に組付き、バンド部４を径の小さくなる側へ変位させる締結部材、例えばボルト・ナット部材７とを有して構成される。バンド部４の外形は、アウタパイプ２の外形に準じた形状をなしていて、アウタパイプ２の周りに挿通できるものである。 The outer pipe 2 is formed slightly larger than the diameter of the inner panel 1, and the end of the inner pipe 1 can be inserted into the end of the outer pipe 2. Incidentally, the outer pipe 2 may be one in which only the end portion is made larger than the diameter dimension of the inner pipe 1.
The clamp member 3 includes a substantially C-shaped band portion 4 formed of a strip-shaped thin member, a pair of seat portions 5 formed at both ends of the band portion 4, and the seat portion 5. It has a fastening member, for example, a bolt / nut member 7 for displacing the portion 4 to the side where the diameter becomes smaller. The outer shape of the band portion 4 has a shape similar to the outer shape of the outer pipe 2 and can be inserted around the outer pipe 2.

つまり、クランプ部材３は、インナパイプ１の端部をアウタパイプ２の端部内に差し込んだ後、インナパイプ１と重なり合うアウタパイプ２の外周面上にバンド部４を配置し、工具（図示しない）を用いて、座部５，５が接近する側にボルト・ナット部材７を回転操作すると、狭まるバンド部４で、アウタパイプ２の端部周壁２ａを周りから締め付ける構造となっている。   That is, in the clamp member 3, after the end portion of the inner pipe 1 is inserted into the end portion of the outer pipe 2, the band portion 4 is disposed on the outer peripheral surface of the outer pipe 2 overlapping the inner pipe 1, and a tool (not shown) is used. When the bolt / nut member 7 is rotated to the side where the seat portions 5 and 5 approach, the band portion 4 that narrows the end peripheral wall 2a of the outer pipe 2 is tightened from around.

一方、アウタパイプ２の端部周壁２ａの複数箇所、例えば両側には、一対の開放スリット９と一対の複数（二本）の閉塞スリット１０が設けられている。いずれのスリット９，１０も、アウタパネル２の軸心方向に沿って延びるスリットで形成されている。またいずれのスリット９，１０も、図３にも示されるようにクランプ部材３で締付けられる締付領域Ｘ（詳しくはバンド部４で覆われる外周面の領域：図３中の二点鎖線で囲まれる領域）に設けられている。   On the other hand, a pair of open slits 9 and a pair of plural (two) closing slits 10 are provided at a plurality of places, for example, both sides, of the end peripheral wall 2a of the outer pipe 2. Each of the slits 9 and 10 is formed by a slit extending along the axial direction of the outer panel 2. Further, as shown in FIG. 3, each of the slits 9 and 10 is also tightened by a clamping region X (specifically, an outer peripheral surface region covered by the band portion 4: surrounded by a two-dot chain line in FIG. 3. Area).

このうち閉塞スリット１０は、図３にも示されるようにバンド部４で締付けられる締付領域Ｘの軸方向に渡り配置されている。具体的には、閉塞スリット１０は、一端が締付領域Ｘのアウタパイプ端側の近くに配置され、他端が締付領域Ｘのアウタパイプ端とは反対側の近くに配置された、両端の閉じたスリットで形成される。
開放スリット９は、この閉塞スリット１０の近傍位置に、同閉塞スリット１０と並行に配置されている。開放スリット９は、一端がアウタパイプ端で開放し、他端が閉塞スリット９の中途部分とオーバラップするまで延びたスリット、具体的には閉じた他端が閉塞スリット９のほぼ長さ方向中央域に配置された直線状のスリット（ここでは１本）で形成されている。これら開放スリット９、閉塞スリット１０によって、バンド部４から締付力が加わると、アウタパイプ２の端部周壁２ａの内面全体が縮径側に変形されつつ、覆うバンド部４の内面により閉塞スリット１０が行き場のない密閉状態となるようにしている。 Of these, the closing slit 10 is arranged in the axial direction of the fastening region X to be fastened by the band portion 4 as shown in FIG. Specifically, the closing slit 10 has one end disposed near the outer pipe end side of the tightening region X and the other end disposed near the opposite side of the outer pipe end of the tightening region X. It is formed with a slit.
The open slit 9 is disposed in the vicinity of the closing slit 10 in parallel with the closing slit 10. The open slit 9 has one end opened at the end of the outer pipe and the other end extended until it overlapped the middle part of the closing slit 9, specifically, the other end closed is a central region in the longitudinal direction of the closing slit 9. Are formed by linear slits (here, one). When a tightening force is applied from the band portion 4 by the opening slit 9 and the closing slit 10, the entire inner surface of the end peripheral wall 2 a of the outer pipe 2 is deformed to the reduced diameter side, and the closing slit 10 is formed by the inner surface of the covering band portion 4. Is in a sealed state with no place to go.

この際、締付領域Ｘの有るアウタパイプ２の端部が縮径側へ変形しやすくなるよう、閉塞スリット１０は、開放スリット９を挟んだ両側にそれぞれ配置してある。特に開放スリット９と閉塞スリット１０の間の距離は、狭ければ狭くなるほどアウタパイプ２の締付領域Ｘは変形しやすくなるものの、反面、狭くなるほど、スリット加工が難しくなる傾向にあるので、ここでは両者の両立が図れるよう、開放スリット９の閉じた端（アウタパイプ端とは反対側の端）は、開放スリット９のスリット幅よりも大きな切欠部、ここでは円形な孔部９ａを形成して、局所的でも閉塞スリット１０間を狭くさせている。また両側の閉塞スリット１０でも、閉塞スリット１０を孔部９ａを中心に両端側が開放スリット９と接近する方向に円弧形に曲成した円弧形スリットが用いて、閉塞スリット１０の両端側においても、開放スリット９間、閉塞スリット１０間を狭くさせてある。   At this time, the closing slits 10 are respectively arranged on both sides of the opening slit 9 so that the end portion of the outer pipe 2 having the tightening region X is easily deformed to the reduced diameter side. In particular, the narrower the distance between the open slit 9 and the closed slit 10, the easier the deformation of the tightening region X of the outer pipe 2, but on the other hand, the narrower it becomes, the more difficult the slit processing becomes. In order to achieve both compatibility, the closed end of the open slit 9 (the end opposite to the outer pipe end) forms a notch that is larger than the slit width of the open slit 9, here a circular hole 9a, The gap between the blocking slits 10 is narrowed even locally. Also, the closed slits 10 on both sides are arc-shaped slits that are curved in an arc shape in the direction in which both ends are close to the open slit 9 with the hole 9 a as the center, and the closed slits 10 are formed at both ends of the closed slit 10. Also, the space between the open slits 9 and the space between the closing slits 10 are narrowed.

すなわち、差込み継手構造は、図３に示されるようにインナパイプ１の端部をアウタパイプ２の端部に差込み、差込んだアウタパイプ２の外周面の周りをクランプ部材３のバンド部４で締付ける。すると、開放スリット９の有る周壁部分は、径の小さくなる側に変形して、インナパイプ１の端部周壁１ａの外面にアウタパイプ２の端部周壁２ａの内面を密接させる。と共に開放スリット９の閉じた端の有る周壁部分も、閉塞スリット１０により、径の小さくなる側に変形して、同様にアウタパイプ２の端部周壁２ａの内面をインナパイプ１の端部周壁１ａの外面に密接させ、パイプ１，２間を強固に締結させる。   That is, in the insertion joint structure, as shown in FIG. 3, the end portion of the inner pipe 1 is inserted into the end portion of the outer pipe 2, and the band portion 4 of the clamp member 3 is tightened around the outer peripheral surface of the inserted outer pipe 2. Then, the peripheral wall part with the open slit 9 is deformed to the side where the diameter becomes smaller, and the inner surface of the end peripheral wall 2a of the outer pipe 2 is brought into close contact with the outer surface of the end peripheral wall 1a of the inner pipe 1. At the same time, the peripheral wall portion having the closed end of the open slit 9 is also deformed by the closing slit 10 to the side where the diameter is reduced, and the inner surface of the end peripheral wall 2a of the outer pipe 2 is similarly changed to the end peripheral wall 1a of the inner pipe 1. The pipes 1 and 2 are firmly fastened closely to the outer surface.

一方、閉塞スリット１０の奥側の端（アウタパイプ端とは反対側の端）の近くの周壁部分９ｂは、開放スリット９や閉塞スリット１０が有る部分とは異なり、縮径方向に変位しない環状の周壁部分なので、同周壁部分９ｂａには、バンド部４の締付力が加わるにしたがい、外側へ隆起する部分が生じ、インナパイプ１とアウタパイプ２間に隙間をもたらす。しかし、閉塞スリット１０の全体は、外側からバンド部４で覆われ、行き場の無い空間になるため、隙間からパイプ１，２内のガス（流体）が、図３中の矢印ａのように閉塞スリット１０内へ漏れたとしても、閉塞スリット１０から外部へ漏れることはない。   On the other hand, the peripheral wall portion 9b near the end on the back side of the closing slit 10 (the end opposite to the outer pipe end) differs from the portion having the opening slit 9 and the closing slit 10 in an annular shape that does not displace in the reduced diameter direction. Since it is a peripheral wall portion, a portion that protrudes outward is generated in the peripheral wall portion 9ba as the tightening force of the band portion 4 is applied, and a gap is formed between the inner pipe 1 and the outer pipe 2. However, since the entire closing slit 10 is covered with the band part 4 from the outside and becomes a space without a place to go, the gas (fluid) in the pipes 1 and 2 is blocked from the gap as indicated by an arrow a in FIG. Even if it leaks into the slit 10, it does not leak from the closing slit 10 to the outside.

したがって、開放スリット９および閉塞スリット１０を組合わせた簡単な構造で、パイプ１，２間における締結力を十分に確保できることはもちろん、パイプ１，２間におけるシール性も十分に確保することができる。開放スリット９の両側に閉塞スリット１０を設けると、効果的にパイプ１，２間の締結力とシール性を増すことができる。
特に、閉塞スリット１０を締付領域Ｘ内の軸方向の大部分を占めるように設け、開放スリット９を同閉塞スリット１０の長さ方向中央域に配置するまで設けると、開放スリット９、閉塞スリット１０を十分に利用して、周壁２ａで大きな変位量が確保でき、一層、効果的にパイプ１，２間における締結力とシール性を増大させることができる。 Therefore, with a simple structure in which the open slit 9 and the closed slit 10 are combined, not only the fastening force between the pipes 1 and 2 can be sufficiently secured, but also the sealing performance between the pipes 1 and 2 can be sufficiently secured. . Providing the closing slits 10 on both sides of the open slit 9 can effectively increase the fastening force between the pipes 1 and 2 and the sealing performance.
In particular, when the closing slit 10 is provided so as to occupy most of the axial direction in the tightening region X, and the opening slit 9 is provided until it is arranged in the central region in the longitudinal direction of the closing slit 10, the opening slit 9 and the closing slit are provided. 10 can be fully utilized to secure a large amount of displacement at the peripheral wall 2a, and the fastening force and the sealing performance between the pipes 1 and 2 can be further effectively increased.

そのうえ、開放スリット９の奥側の端に孔部９ａを形成すると、簡単、かつ加工が容易なスリット構造で、開放スリット９の端付近を変形しやすくでき、容易にパイプ１，２間の締結性、シール性を高めることができる。加えて、開放スリット９を挟んだ両側の閉塞スリット１０の両端側を孔部９ａを中心に中央側へ接近する方向に曲成した円弧スリットにすると、孔部９ａと協同して、一層、効果的にパイプ１，２間における締結力とシール性を増大させることができる。   In addition, if the hole 9a is formed at the end on the back side of the open slit 9, the end structure of the open slit 9 can be easily deformed with a simple and easy slit structure, and the pipes 1 and 2 can be easily fastened. And sealing properties can be improved. In addition, if both ends of the closing slit 10 on both sides of the open slit 9 are arc slits bent in the direction approaching the center with the hole 9a as the center, the effect is further enhanced in cooperation with the hole 9a. Therefore, the fastening force and the sealing performance between the pipes 1 and 2 can be increased.

図４は、本発明の第２の実施形態を示す。
本実施形態は、閉塞スリット１０を円弧形でなく、直線状のスリットを用いたものである。このようにしても第１の実施形態と同様の効果を奏する。
図５は、本発明の第３の実施形態を示す。
本発明は、開放スリット９として、孔部のない直線状のスリットを用いたものである。もちろん、開放スリット９の閉じ側の端は、二点鎖線ｓのようにアウタパイプ１端寄りの地点に配置されても、二点鎖線ｔのようにアウタパイプ１端から離れる側寄りの地点に配置されても、第１の実施形態と同様の効果を奏する。 FIG. 4 shows a second embodiment of the present invention.
In the present embodiment, the closing slit 10 is not a circular arc but a linear slit. Even if it does in this way, there exists an effect similar to 1st Embodiment.
FIG. 5 shows a third embodiment of the present invention.
In the present invention, a straight slit without a hole is used as the open slit 9. Of course, the end on the closed side of the open slit 9 is arranged at a point near the end of the outer pipe 1 as shown by a two-dot chain line s, even if it is arranged at a point near the end of the outer pipe 1 as shown by a two-dot chain line s. However, the same effects as those of the first embodiment can be obtained.

但し、図４および図４において、上述した第１の実施形態と同じ部分には、同一符号を付勢してその説明を省略した。
なお、本発明は、上述した実施形態に限定されるものではなく、本発明の主旨を逸脱しない範囲内で種々可変して実施しても構わない。例えば上述した実施形態では、ガスが流れる配管に本発明の差込み継手構造を適用したが、これに限らず、液体が流れる配管などに適用してもよい。また上述の実施形態では、開放スリットの両側に閉塞スリットも配置した例を挙げたが、さらにその閉塞スリットの両側に多段的に閉塞スリットを設けるようにしても構わない。また閉塞スリットの両側に開放スリットを設ける構造でも構わない。 However, in FIG. 4 and FIG. 4, the same parts as those in the first embodiment described above are energized with the same reference numerals, and the description thereof is omitted.
Note that the present invention is not limited to the above-described embodiment, and various modifications may be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the insertion joint structure of the present invention is applied to a pipe through which a gas flows. However, the present invention is not limited thereto, and may be applied to a pipe through which a liquid flows. In the above-described embodiment, an example in which blocking slits are also arranged on both sides of the opening slit has been described. However, blocking slits may be provided in multiple stages on both sides of the blocking slit. Further, a structure in which open slits are provided on both sides of the closing slit may be used.

１ インナパイプ
２ アウタパイプ
３ クランパ部材
９ 開放スリット
１０ 閉塞スリット
９ａ 孔部（切欠部）
Ｘ 締付領域 DESCRIPTION OF SYMBOLS 1 Inner pipe 2 Outer pipe 3 Clamper member 9 Opening slit 10 Closing slit 9a Hole (notch)
X Tightening area

Claims (4)

インナパイプの端部をアウタパイプの端部内に差込み、前記インナパイプと重なり合う前記アウタパイプの外周面をクランプ部材で周りから締付けて、前記インナパイプの端部周壁と前記アウタパイプの端部周壁同士を固定する差込み継手構造であって、
前記アウタパイプの端部周壁は、
前記クランプ部材で締付けられる締付領域内で、前記アウタパイプの軸心方向に沿って延びるように配置された、両端の閉じた閉塞スリットと、
前記閉塞スリットの近傍に位置して前記閉塞スリットと並行に配置され、前記アウタパイプ端で開放して前記閉塞スリットの中途部分とオーバラップするまで延びる開放スリットとを有している
ことを特徴とする差込み継手構造。 The end of the inner pipe is inserted into the end of the outer pipe, and the outer peripheral surface of the outer pipe that overlaps the inner pipe is tightened from around with a clamp member to fix the end peripheral wall of the inner pipe and the end peripheral wall of the outer pipe together. Plug-in joint structure,
The outer peripheral wall of the outer pipe is
Closed slits at both ends, which are disposed so as to extend along the axial center direction of the outer pipe in a tightening region tightened by the clamp member;
It is located in the vicinity of the closing slit, and is arranged in parallel with the closing slit, and has an open slit that opens at the end of the outer pipe and extends to overlap with the middle portion of the closed slit. Plug-in joint structure. 前記閉塞スリットは、前記開放スリットを挟んで両側にそれぞれ配置されることを特徴とする請求項１に記載の差込み継手構造。   The plug joint structure according to claim 1, wherein the closing slits are disposed on both sides of the opening slit. 前記閉塞スリットは、前記締付領域内に渡り配置され、
前記開放スリットは、前記アウタパイプ端と反対側の閉じた端が、前記閉塞スリットのほぼ長さ方向中央域に配置されることを特徴とする請求項１または請求項２に記載の差込み継手構造。 The closing slit is arranged in the tightening region,
3. The insertion joint structure according to claim 1, wherein the open slit has a closed end opposite to an end of the outer pipe disposed in a substantially central region in the length direction of the closing slit. 4. 前記開放スリットの、前記アウタパイプ端と反対側の閉じた端は、当該開放スリットのスリット幅よりも大きな切欠部を有していることを特徴とする請求項１ないし請求項３のいずれか一つに記載の差込み継手構造。   The closed end of the open slit opposite to the outer pipe end has a cutout portion larger than the slit width of the open slit. The insertion joint structure described in 1.
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