JP4714917B2

JP4714917B2 - Pipe fitting

Info

Publication number: JP4714917B2
Application number: JP2001089955A
Authority: JP
Inventors: 真一長井; 信之浅里
Original assignee: Nitta Corp
Current assignee: Nitta Corp
Priority date: 2001-03-27
Filing date: 2001-03-27
Publication date: 2011-07-06
Anticipated expiration: 2021-03-27
Also published as: JP2002286182A

Description

【０００１】
【発明の属する技術分野】
この発明は、ホースやチューブなどの配管類の接続機構を有する管継手に関するものである。
【０００２】
【従来の技術】
従来より、油、水、エアー等の流体の配管のためにホースをグリッパーで保持する機構を有する管継手が使用されている。
【０００３】
図５に示すように、この管継手はホース21の挿入初期の使用前の段階では、合成樹脂製のグリッパー22はホース21表面に軽く食いついているだけの状態である。この状態でホース21を加圧すると、内圧によってホース21とグリッパー22は図示右側に一体的に移動し、継手本体23内壁のテーパー部24に沿ってグリッパー22は縮径してホース21に食い込んでいく。
【０００４】
このグリッパー22の縮径変形によってホース21を保持し、使用中の抜けを防止する。そして使用するにつれグリッパー22はホース21表面に食い込んでいき、ホース21は経時的に更に抜け難くなっていく。ところが、一定期間装置を使用した後のメンテナンスや掃除などの際には、ホース21を管継手から取り外す必要がある。
【０００５】
しかし、前記の通りホース21は非常に抜け難くなっている。このため、継手本体23の側面に予め孔部（図示せず）を穿設しておいて、この孔部から継手内部へとピン（図示せず）を挿入してグリッパー22の移動を拘束した状態でホース21を引き抜くなどの工夫が考えられるが、より簡単な操作で引き抜くことが要望される。
【０００６】
【発明が解決しようとする課題】
そこでこの発明は、より簡単な態様で配管を引き抜くことができる管継手を提供しようとするものである。
【０００７】
【課題を解決するための手段】
前記課題を解決するためこの発明では次のような技術的手段を講じている。
（１）この発明の管継手は、配管を継手本体内で把持する保持部材と前記保持部材を奥側へ押し込む解除部材とを有し、前記保持部材は、管挿入口側の端部へ向かってのみテーパー面が形成されると共に、奥側の端部が前記テーパー面に連なって円筒状に形成され、保持部材と挿入された配管が抜け方向に移動すると、保持部材は、前記継手本体のテーパー面に沿ってのみ縮径して配管に食い込むようにしていると共に、前記継手本体内には、配管を挿入した終端側を塞ぐ壁面に、前記保持部材の奥側の端部を拡径させる乗り上げ面を有し、また継手本体の内壁には、前記保持部材の奥側の端部を囲う内筒面と、この内筒面から連なって管挿入口側へ向かって縮径したテーパー面とが形成され、また前記解除部材には保持部材の管挿入口側の端部を拡径させるテーパー面が形成され、
前記解除部材によって保持部材を奥側へ押し込むと、保持部材は、奥側の端部が前記乗り上げ面に接して全体的に拡径方向に変形し、保持部材による配管への食い込みが解除された状態となるようにしており、この食い込みが解除された状態において、保持部材を奥側へ押し込んだとき、保持部材は、継手本体内の乗り上げ面と解除部材のテーパー面とに挟まれて、配管から離反する方向に対して保持部材の前後の双方から変形させる力が加わり、保持部材が全体的に拡径方向に変形し、保持部材の前記奥側の端部の外周面及び前記テーパー面が、それぞれ継手本体内の内壁の前記内筒面及びテーパー面に沿う状態となることを特徴とする。
また前記保持部材は、内周面のうち両端部を除く軸方向中央寄りの部位に内周面が平坦状になった突起を含む複数条の環状突起帯が突設されることが好ましい。
【０００８】
この管継手では使用後に配管を引き抜くときは、解除部材によって保持部材を奥側へ押し込むことにより保持部材の奥側の端部が継手本体内の乗り上げ面に乗り上げて拡径した状態とする。これにより保持部材による配管への食い込みが解除され、配管を引き抜くことができる。
▲２▼ 前記解除部材に保持部材の管挿入口側の端部を拡径させるテーパー面が形成されたこととしてもよい。
【０００９】
このように構成すると保持部材は、その奥側の端部を拡径させる継手本体内の乗り上げ面とその管挿入口側の端部を拡径させる解除部材のテーパー面とに挟まれて全体的に拡管方向に変形するので、保持部材の配管への食い込みがより完全に解除される。
▲３▼ 前記保持部材の管挿入口側の端部に解除部材側のテーパー面と対向するテーパー面が形成されたこととしてもよい。
【００１０】
このように構成すると、解除部材側のテーパー面とこれに対向する保持部材の管挿入口側の端部のテーパー面によって保持部材の管挿入口側の端部はより円滑に拡径せしめられる。
【００１１】
【発明の実施の形態】
以下、この発明の実施の形態を図面を参照して説明する。
【００１２】
図１乃至図４に示すように、この管継手は、合成樹脂製の配管（ホース）１を継手本体２内で把持する合成樹脂製の筒状の保持部材（グリッパー）３と前記保持部材３を奥側へ押し込む合成樹脂製の筒状の解除部材（リリース）４とを有する。
【００１３】
前記保持部材３（図４参照）は、管挿入口側の端部と奥側の端部との前後から交互に複数本のスリット５が平行に形成されており、拡縮径を可能としている。また保持部材３の内周面には、配管１の外周面に食い込んで強固に保持するように複数条の環状突起帯６が突設されている。
【００１４】
そして、使用時に前記保持部材３と挿入された配管１が抜け方向に一緒に移動すると、保持部材３は継手本体２内のテーパー面７（テーパー状の傾斜面）に沿って縮径して配管１に食い込んでいくようにしている。保持部材３は配管１の外周面を全体的に押さえ込んで食い締めしっかりと緊締する。
【００１５】
また継手本体２内には、前記保持部材３の奥側の端部を拡径させる乗り上げ面８を形成している。この乗り上げ面８は、継手本体２内における配管１を挿入した終端側の壁面に形成している。一方、前記解除部材４には、保持部材３の管挿入口側の端部を拡径させるテーパー面９を形成している。さらに前記保持部材３の管挿入口側の端部に、解除部材４側のテーパー面９と相対向するテーパー面10を形成している。
【００１６】
次に、この実施形態の管継手の使用状態を説明する。
【００１７】
図１に示すように、配管１の挿入初期の使用前の段階では合成樹脂製の保持部材３は配管１表面に軽く食いついているだけの状態である。
【００１８】
この状態で配管１を加圧すると、図２に示すように、内圧によって配管１と保持部材３は図示右側に一体的に移動し、継手本体２内壁のテーパー部７に沿って保持部材３は縮径して配管１に食い込んでいく。この保持部材３の縮径変形によって配管１を保持し、使用中の抜けを防止する。
【００１９】
図３に示すように、使用後に配管１を引き抜くときは先ず配管１を奥側に押し込む。また解除部材４によって保持部材３を奥側へ押し込むことにより、保持部材３の奥側の端部が継手本体２内における終端側の壁面の乗り上げ面８に乗り上げて拡径した状態とする。これにより保持部材３による配管１への食い込みが解除され、配管１を引き抜くことができる。したがって保持部材３が配管１表面に食い込んで配管１が経時的に抜け難くなっていても、容易に引き抜くことができる。
【００２０】
この管継手によると、継手本体２の側面に予め穿設した孔部から継手内部へピンを挿入して保持部材３の移動を拘束した状態で配管１を引き抜くような手がかかる態様でなくても配管１を引き抜くことができるので、より簡単な態様で配管１を引き抜くことができるという利点がある。
【００２１】
また前記解除部材４に、保持部材３の管挿入口側の端部を拡径させるテーパー面９を形成しており、保持部材３は、その奥側の端部を拡径させる継手本体２内の乗り上げ面８とその管挿入口側の端部を拡径させる解除部材４のテーパー面９とに挟まれて全体的に拡径方向に変形するので、保持部材３の配管１への食い込みがより完全に解除されるという利点がある。すなわち、配管１から離反する方向に対して保持部材３の前後の双方から変形させる力が加わり、保持部材３が片方端からだけではなく全体的に拡径するので非常に分離し易い。
【００２２】
さらに、前記保持部材３の管挿入口側の端部に解除部材４側のテーパー面９と対向するテーパー面10を形成したので、解除部材４側のテーパー面９とこれに対向する保持部材３の管挿入口側の端部のテーパー面10によって保持部材３の管挿入口側の端部はより円滑に拡径せしめられるという利点がある。
【００２３】
【発明の効果】
この発明は上述のような構成であり、次の効果を有する。
【００２４】
継手本体の側面に予め穿設した孔部から継手内部へピンを挿入してグリッパーの移動を拘束した状態でホースを引き抜くような手がかかる態様でなくても配管を引き抜くことができるので、より簡単な態様で配管を引き抜くことができる管継手を提供することができる。
【図面の簡単な説明】
【図１】この発明の管継手の実施形態で配管挿入時初期の状態を示す半断面図。
【図２】図１の管継手で配管加圧後の状態を示す半断面図。
【図３】図２の管継手で配管分離時の状態を示す半断面図。
【図４】図１の管継手の保持部材の構造を説明するために継手本体から離して示す分解半断面図。
【図５】従来の管継手を示す半断面図。
【符号の説明】
１配管
２継手本体
３保持部材
４解除部材
７テーパー面（継手本体内）
８乗り上げ面
９テーパー面（解除部材）
10 テーパー面（保持部材）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe joint having a connection mechanism for piping such as a hose and a tube.
[0002]
[Prior art]
Conventionally, a pipe joint having a mechanism for holding a hose with a gripper has been used for piping of fluids such as oil, water, and air.
[0003]
As shown in FIG. 5, this pipe joint is in a state where the synthetic resin gripper 22 is lightly biting the surface of the hose 21 at the stage before the use of the hose 21 at the initial stage of insertion. When the hose 21 is pressurized in this state, the internal pressure causes the hose 21 and the gripper 22 to move integrally to the right side in the figure, and the gripper 22 is reduced in diameter along the tapered portion 24 of the inner wall of the joint body 23 and bites into the hose 21. Go.
[0004]
The hose 21 is held by the reduced diameter deformation of the gripper 22 to prevent the gripper 22 from coming off during use. As it is used, the gripper 22 bites into the surface of the hose 21, and the hose 21 becomes more difficult to come off over time. However, it is necessary to remove the hose 21 from the pipe joint during maintenance or cleaning after using the device for a certain period of time.
[0005]
However, as described above, the hose 21 is very difficult to come off. For this reason, a hole (not shown) is previously formed in the side surface of the joint body 23, and a pin (not shown) is inserted into the joint from the hole to restrain the gripper 22 from moving. Although a device such as pulling out the hose 21 in a state can be considered, it is desired to pull it out with a simpler operation.
[0006]
[Problems to be solved by the invention]
Therefore, the present invention intends to provide a pipe joint that can pull out a pipe in a simpler manner.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention takes the following technical means.
(1) The pipe joint of the present invention has a holding member that holds the pipe within the joint body and a release member that pushes the holding member to the back side, and the holding member faces the end on the pipe insertion port side. Rutotomoni Tenomi tapered surface is formed, the ends of the rear side is formed in a cylindrical shape continuous to the tapered surface, when the inserted pipe and the holding member omission moves in a direction, the holding member, the joint body together so that bites into the pipe decreases in diameter only along the tapered surface, the said joint body, the wall closing the end side of the insertion of the pipe, increase the diameter of the end portion of the back side of the holding member The inner wall of the joint body has a riding surface, and an inner cylindrical surface that surrounds the inner end of the holding member, and a tapered surface that is continuous from the inner cylindrical surface and is reduced in diameter toward the tube insertion port. The release member is formed on the tube insertion port side of the holding member. Part tapered surface for diameter is formed, and
When the holding member is pushed into the back side by the release member, the holding member is deformed in the diameter increasing direction with the end on the back side coming into contact with the riding surface, and the biting into the pipe by the holding member is released. In this state where the biting is released, when the holding member is pushed inward, the holding member is sandwiched between the riding surface in the joint body and the tapered surface of the releasing member, and the piping A force to deform from both the front and rear sides of the holding member is applied to the direction away from the holding member, the holding member is deformed as a whole in the diameter increasing direction, and the outer peripheral surface and the tapered surface of the rear end portion of the holding member are The inner wall of the joint body is in a state along the inner cylindrical surface and the tapered surface .
Moreover, it is preferable that the holding member is provided with a plurality of annular protrusion bands including a protrusion having a flat inner peripheral surface at a portion near the center in the axial direction excluding both ends of the inner peripheral surface.
[0008]
In this pipe joint, when the pipe is pulled out after use, the holding member is pushed into the back side by the release member, so that the end on the back side of the holding member rides on the riding surface in the joint body and is expanded in diameter. Thereby, the biting into the pipe by the holding member is released, and the pipe can be pulled out.
(2) The release member may be formed with a tapered surface for expanding the diameter of the end of the holding member on the tube insertion port side.
[0009]
With this configuration, the holding member is sandwiched between the riding surface in the joint body that expands the end on the back side and the tapered surface of the release member that expands the end on the tube insertion port side. Therefore, the holding member is more completely released from biting into the pipe.
(3) A tapered surface facing the tapered surface on the release member side may be formed at the end of the holding member on the tube insertion port side.
[0010]
If comprised in this way, the diameter of the edge part by the side of the tube insertion port of a holding member will be more smoothly expanded by the taper surface of the release member side and the taper surface of the edge part by the side of the tube insertion port of the holding member which opposes this.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0012]
As shown in FIG. 1 to FIG. 4, this pipe joint includes a synthetic resin tubular holding member (gripper) 3 for holding a synthetic resin pipe (hose) 1 in a joint body 2 and the holding member 3. And a cylindrical release member (release) 4 made of synthetic resin that pushes the back into the back side.
[0013]
In the holding member 3 (see FIG. 4), a plurality of slits 5 are alternately formed in parallel from the front and rear of the end portion on the tube insertion port side and the end portion on the back side, thereby enabling an expansion / contraction diameter. Further, a plurality of annular protrusion bands 6 protrude from the inner peripheral surface of the holding member 3 so as to bite into the outer peripheral surface of the pipe 1 and hold it firmly.
[0014]
Then, when the holding member 3 and the inserted pipe 1 are moved together in the withdrawal direction during use, the holding member 3 is reduced in diameter along the tapered surface 7 (tapered inclined surface) in the joint body 2 and the piping. I try to bite into one. The holding member 3 presses the outer peripheral surface of the pipe 1 as a whole and tightens it tightly.
[0015]
Further, a ride-up surface 8 is formed in the joint body 2 for expanding the diameter of the end on the back side of the holding member 3. The riding surface 8 is formed on the wall surface on the terminal side into which the pipe 1 is inserted in the joint body 2. On the other hand, the release member 4 is formed with a tapered surface 9 for expanding the diameter of the end of the holding member 3 on the tube insertion port side. Further, a tapered surface 10 opposite to the tapered surface 9 on the release member 4 side is formed at the end of the holding member 3 on the tube insertion port side.
[0016]
Next, the use state of the pipe joint of this embodiment will be described.
[0017]
As shown in FIG. 1, the holding member 3 made of synthetic resin is only slightly biting on the surface of the pipe 1 at the stage before use of the pipe 1 at the initial stage of insertion.
[0018]
When the pipe 1 is pressurized in this state, as shown in FIG. 2, the pipe 1 and the holding member 3 are integrally moved to the right side by the internal pressure, and the holding member 3 is moved along the tapered portion 7 of the inner wall of the joint body 2. Reduce the diameter and bite into the pipe 1. The pipe 1 is held by the reduced diameter deformation of the holding member 3 to prevent the pipe 1 from coming off during use.
[0019]
As shown in FIG. 3, when pulling out the pipe 1 after use, the pipe 1 is first pushed into the back side. Further, the holding member 3 is pushed into the back side by the release member 4, so that the end on the back side of the holding member 3 rides on the riding surface 8 on the wall surface on the terminal end side in the joint body 2 to increase the diameter. Thereby, the biting into the pipe 1 by the holding member 3 is released, and the pipe 1 can be pulled out. Therefore, even if the holding member 3 bites into the surface of the pipe 1 and the pipe 1 is difficult to be removed over time, it can be easily pulled out.
[0020]
According to this pipe joint, it is not a mode in which it takes a hand to pull out the pipe 1 in a state in which a pin is inserted into the joint from a hole previously drilled in the side surface of the joint body 2 and the movement of the holding member 3 is restricted. Since the pipe 1 can be pulled out, there is an advantage that the pipe 1 can be pulled out in a simpler manner.
[0021]
Further, the release member 4 is formed with a tapered surface 9 for expanding the diameter of the end of the holding member 3 on the tube insertion port side, and the holding member 3 is inside the joint main body 2 for expanding the diameter of the end on the back side. Is sandwiched between the lifting surface 8 and the tapered surface 9 of the release member 4 that expands the diameter of the end portion on the tube insertion port side, and is deformed in the overall diameter increasing direction, so that the holding member 3 bites into the pipe 1. There is an advantage that it is released more completely. That is, a force for deforming both the front and rear sides of the holding member 3 in the direction away from the pipe 1 is applied, and the holding member 3 expands not only from one end but as a whole, so that it is very easy to separate.
[0022]
Further, since the tapered surface 10 opposite to the tapered surface 9 on the release member 4 side is formed at the end of the holding member 3 on the tube insertion port side, the tapered surface 9 on the release member 4 side and the holding member 3 opposite to the tapered surface 9 are formed. There is an advantage that the diameter of the end of the holding member 3 on the tube insertion port side can be increased more smoothly by the tapered surface 10 at the end of the tube insertion port.
[0023]
【The invention's effect】
The present invention is configured as described above and has the following effects.
[0024]
Since it is possible to pull out the pipe even if it is not an aspect that takes a hand to pull out the hose in a state where the pin is inserted into the joint from the hole previously drilled in the side surface of the joint body and the movement of the gripper is restrained, A pipe joint capable of pulling out a pipe in a simple manner can be provided.
[Brief description of the drawings]
FIG. 1 is a half sectional view showing an initial state when a pipe is inserted in an embodiment of a pipe joint of the present invention.
2 is a half cross-sectional view showing a state after pressure is applied to the pipe joint of FIG.
FIG. 3 is a half cross-sectional view showing a state at the time of pipe separation in the pipe joint of FIG.
4 is an exploded half cross-sectional view showing the structure of the holding member of the pipe joint of FIG. 1 apart from the joint body. FIG.
FIG. 5 is a half sectional view showing a conventional pipe joint.
[Explanation of symbols]
1 Piping 2 Joint body 3 Holding member 4 Release member 7 Tapered surface (in joint body)
8 Riding surface 9 Tapered surface (release member)
10 Tapered surface (holding member)

Claims

The holding member and the holding member for gripping a pipe inside the joint body and a releasing member pushing to the far side, the holding member is tapered surfaces only towards the end of the tube insertion port side is formed Rutotomoni, When the back end is connected to the tapered surface and formed into a cylindrical shape, and the holding member and the inserted pipe move in the removal direction, the holding member is reduced in diameter only along the tapered surface of the joint body. together so that bites into the pipe, the said fitting body, the wall closing the end side of the insertion of the pipe, has a run-up surface for enlarged end portion of the back side of the holding member, also of the joint body The inner wall is formed with an inner cylindrical surface that surrounds the end on the back side of the holding member, and a tapered surface that is continuous from the inner cylindrical surface and is reduced in diameter toward the tube insertion port side. Tapered surface that expands the diameter of the end of the holding member on the tube insertion port side Is formed,
When the holding member is pushed into the back side by the release member, the holding member is deformed in the diameter increasing direction with the end on the back side coming into contact with the riding surface, and the biting into the pipe by the holding member is released. In this state where the biting is released, when the holding member is pushed inward, the holding member is sandwiched between the riding surface in the joint body and the tapered surface of the releasing member, and the piping A force to deform from both the front and rear sides of the holding member is applied to the direction away from the holding member, the holding member is deformed as a whole in the diameter increasing direction, and the outer peripheral surface and the tapered surface of the rear end portion of the holding member are Each of the pipe joints is in a state along the inner cylindrical surface and the tapered surface of the inner wall in the joint body .

2. The tube according to claim 1, wherein the holding member is provided with a plurality of annular protrusion bands including protrusions having a flat inner peripheral surface at a portion near the center in the axial direction excluding both ends of the inner peripheral surface. Fittings.

The pipe joint according to claim 1 or 2, wherein a tapered surface facing the tapered surface on the release member side is formed at an end of the holding member on the tube insertion port side.