JP2007162832A - Joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint mountable/demountable on/from a pipe body such as hose with easy operation. <P>SOLUTION: A protruded portion 14 is formed on the peripheral face of a joint body 12, and a first bagged portion 18 formed of a rubber and filled with fluid 24 is arranged on one side (on the opposite side to the hose 30) of the protruded portion 14. On the other side of the protruded portion, a second bagged portion 20 formed of a rubber and filled with the fluid 24 is arranged between the joint body 12 and the hose 30. The first bagged portion 18 and the second bagged portion 20 are communicated with each other via a connection pipe 22. A nut 16 is provided on a screw portion of the joint body 12, and the nut is fastened to the side of the protruded portion 14 to crush the first bagged portion 18. Thus, the fluid 24 moves through the connection pipe 22 to the second bagged portion 20, and then the second bagged portion 20 is expanded to thrust the inner wall of the hose 30. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a joint capable of attaching and detaching (detaching) a tubular body with a simple operation.

  Conventionally, when fixing a metal fitting constituting a joint to a hose, the hose is inserted into a metal pipe formed on the metal fitting, and the pipe is fixed to the hose by using a crimping machine. Further, an O-ring or the like disposed inside the joint is used for sealing the hose and the joint (see, for example, Patent Document 1).

However, with such a metal fitting, a dedicated caulking machine for fixing the metal fitting to the hose is required, and the work of fixing takes time. Moreover, once the metal fitting is crimped on the hose, the metal fitting cannot be removed from the hose and reused. Furthermore, although the O-ring is liable to cause fluid leakage due to sag or flat deformation, it cannot be repaired because the metal fitting is crimped to the hose.
JP-A-8-103837

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a joint capable of attaching and detaching (detaching) a tubular body such as a hose by a simple operation.

  In order to solve the above-mentioned problem, a joint according to the first aspect of the present invention is a joint that is detachably fixed to a pipe body, the joint body inserted into the pipe body, and the joint body A projecting portion that projects from the peripheral surface of the tubular body and contacts the mouth of the tubular body to position the tubular body, a movable member that is provided and movable in the axial direction of the tubular body, and the projecting portion, An elastic first bag-like portion provided between the moving members and enclosing a fluid therein, and provided between the joint body and the tubular body, and enclosing the fluid therein And a stretchable second bag-shaped portion communicating with the bag-shaped portion.

  According to the first aspect of the present invention, the joint body is inserted into the tube body, and the tube body is positioned by the mouth portion of the tube body coming into contact with the protruding portion. Between the projecting portion and the moving member that moves in the axial direction of the tube body, an elastic first bag-like portion in which a fluid is sealed is provided, and when the moving member is moved in the direction of the projecting portion The first bag-like portion is crushed. A stretchable second bag-like portion communicating with the first bag-like portion is provided between the joint body and the tube body, and when the first bag-like portion is crushed, The fluid moves to the second bag-like portion, and the second bag-like portion expands. Thereby, a 2nd bag-like part presses the inner wall of a pipe body, and a pipe body is hold | maintained at a coupling main body.

  Further, when the tubular body is detached from the joint body, the moving member is moved in a direction away from the protruding portion. As a result, the internal pressure of the second bag-shaped portion decreases (the pressing force of the second bag-shaped portion on the inner wall of the tube body is released), and the tube body can be pulled out from the joint body. Therefore, the tube body can be attached to and detached from the joint body by a simple operation.

  According to a second aspect of the present invention, in the joint according to the first aspect, the second bag-shaped portion is an annular body, and the second bag-shaped portion is connected to the first bag through a connecting pipe penetrating the protruding portion. It is characterized by being communicated with the shaped part.

  According to invention of Claim 2, the fluid in a 1st bag-like part moves to an annular body through a connection pipe, and the annular body as a 2nd bag-like part expand | swells. For this reason, the whole circumferential direction of the inner wall of the tubular body is pressed by the annular body, the tubular body is more securely held, and the tubular body and the joint are sealed by the annular body.

  According to a third aspect of the present invention, in the joint according to the first or second aspect, the moving member is a nut that is screwed into a threaded portion of a peripheral surface of the joint body.

  According to invention of Claim 3, a 1st bag-shaped part is crushed by tightening the nut screwed by the thread part of the surrounding surface of a coupling main body in the direction of a protrusion part, and a 2nd bag-shaped part Expands to hold the tube. Further, when the tube body is detached, the nut is turned back to the original position, and the tube body is pulled out from the joint body. For this reason, the attachment / detachment operation of the joint becomes easy.

  According to a fourth aspect of the present invention, in the joint according to the third aspect, the joint body is provided with a detent that restricts the nut from separating from the protruding portion.

  According to the fourth aspect of the present invention, the nut is prevented from being separated from the protruding portion by the rotation stopper provided in the joint body. For this reason, the nut does not move in a direction away from the protruding portion due to an external force when the joint is used, and the tubular body is prevented from being inadvertently detached from the joint body.

  According to a fifth aspect of the present invention, in the joint according to the first or second aspect, the moving member is made of an elastic member, and is elastically deformed when the tubular body is held by the second bag-like portion. It is characterized by providing the engaging part engaged with the to-be-engaged part formed in the said protrusion part.

  According to the fifth aspect of the present invention, when the tubular body is held by the second bag-like portion, the engaging portion of the moving member is elastically deformed and engaged with the engaged portion formed in the protruding portion. Is done. For this reason, when the joint is used, the moving member is not moved in a direction away from the protruding portion by an external force, and the tubular body is prevented from being carelessly detached from the joint body.

  According to a sixth aspect of the present invention, in the joint according to any one of the first to fifth aspects, the first of the moving member is interposed between the first bag-shaped portion and the moving member. It is characterized in that a washer for restricting biting into the bag-like portion is provided.

  According to the sixth aspect of the present invention, the washer is provided between the first bag-shaped portion and the moving member, and when the moving member moves, the moving member bites into the first bag-shaped portion by the washer. Is suppressed. For this reason, the breakage of the first bag-like portion is prevented.

  Since the joint according to the present invention is configured as described above, the joint can be attached to and detached from a tubular body such as a hose by a simple operation.

  Embodiments of the joint of the present invention will be described below with reference to the drawings.

  FIG. 1 is a half-cut sectional view showing a first embodiment of a joint 10 according to the present invention, and shows a state before the joint 10 is fixed to a hose 30.

  As shown in FIG. 1, the joint 10 includes a cylindrical joint body 12 that is inserted into a hose 30. The joint body 12 is provided with a projecting portion 14 projecting from the peripheral surface, and the hose 30 is positioned by bringing the mouth portion of the hose 30 into contact with the projecting portion 14.

  On the peripheral surface of the joint body 12, a male thread 15 is formed on one side of the protrusion 14 (opposite to the hose 30), and a nut 16 is screwed onto the male thread 15 to move in the axial direction of the joint body 12. It is possible.

  On the peripheral surface of the joint body 12, a stretchable first bag-like portion 18 is disposed between the protruding portion 14 and the nut 16. In addition, a stretchable second bag-like portion 20 is disposed between the joint body 12 and the hose 30 on the side opposite to the nut 16 of the protruding portion 14. The first bag-like portion 18 and the second bag-like portion 20 are communicated with each other by a stretchable connecting pipe 22. The connecting pipe 22 is penetrated through an opening 14 </ b> A formed at the base of the protruding portion 14.

  The first bag-shaped portion 18 and the second bag-shaped portion 20 are filled with a fluid 24 having viscosity inside, and the fluid 24 is between the first bag-shaped portion 18 and the second bag-shaped portion 20. It is movable through the connecting pipe 22. And when the fluid 24 moves from the 1st bag-like part 18 to the 2nd bag-like part 20, and the 2nd bag-like part 20 expand | swells, it is comprised so that the inner wall of the hose 30 may be pressed and the hose 30 may be hold | maintained. ing.

  As the material of the expansion and contraction portions of the first bag-shaped portion 18, the second bag-shaped portion 20, and the connecting pipe 22, an elastic material such as rubber is used. For example, SBR, NBR, EPDM, silicone rubber, fluororubber, IIR ( Butyl rubber) and natural rubber are used. Moreover, as the fluid 24, a liquid, a fluid with high viscosity, etc. can be used. For example, as the fluid 24, silicone oil, mineral hydraulic oil, grease, or the like is used. The joint 10 is made of metal such as stainless steel, but is not necessarily limited to metal, and may be made of plastic, for example. The hose 30 is made of rubber or resin.

  Further, a protective portion 16 </ b> A that is bent so as to cover the first bag-shaped portion 18 from the outside is formed on the outer peripheral surface of the nut 16. In addition, a protrusion 26 is formed at the distal end of the joint body 12 on the second bag-like portion 20 side and projects in the radial direction outside the end of the second bag-like portion 20.

  As shown in FIG. 3 (A), the first bag-shaped portion 18 is formed of an annular body, and a small-diameter cylindrical male screw portion 18A is projected on the side surface. The male screw portion 18A is made of plastic, for example. In addition, a female screw portion (not shown) to which the male screw portion 18 </ b> A is fastened is provided at one end portion of the inner peripheral surface of the connecting pipe 22. Further, the second bag-shaped portion 20 is formed of a flat annular body, and similarly to the first bag-shaped portion 18, a small-diameter cylindrical male screw portion (not shown) protrudes from the side surface, and the inner circumference of the connecting pipe 22. Fastened to the female screw portion 22A formed at the other end of the surface. And as shown in FIG.3 (B), the external thread part of the 2nd bag-shaped part 20 is fastened to the internal thread part 22A of the connection pipe 22 in the fluid 24 with which the inside of the bathtub which is not shown in figure was filled, and the 1st bag The male screw portion 18 </ b> A of the shaped portion 18 is fastened to the female screw portion of the connecting pipe 22. As a result, the first bag-shaped portion 18, the second bag-shaped portion 20, and the connecting pipe 22 are integrated, and the fluid 24 is filled therein.

  Next, the operation of the joint 10 will be described.

  As shown in FIG. 1, when the hose 30 is attached to the joint 10, the inside of the hose 30 is inserted outside the second bag-shaped portion 20 of the joint body 12. And the 1st bag-shaped part 18 is crushed by tightening the nut 16 to the direction of the protrusion part 14 (arrow A direction). As a result, as shown in FIG. 2, the fluid 24 in the first bag-shaped portion 18 moves to the second bag-shaped portion 20 through the connecting pipe 22, and the second bag-shaped portion 20 expands. And the 2nd bag-shaped part 20 presses the inner wall of the hose 30, and the hose 30 is hold | maintained at the coupling main body 12. FIG. Since the 2nd bag-shaped part 20 is a cyclic | annular body, it can contact | adhere to the inner wall of the hose 30 firmly, and can seal the hose 30 and the coupling 10. FIG.

  On the other hand, when the hose 30 is detached from the joint 10, the nut 16 is turned in a direction away from the protruding portion 14 and returned to its original state. At this time, the internal pressure of the 2nd bag-shaped part 20 falls (the pressing force of the 2nd bag-shaped part 20 to the inner wall of the hose 30 is open | released), and the hose 30 can be extracted from the coupling main body 12. FIG.

  In such a joint 10, a dedicated crimping machine for fixing to the hose 30 is not required, and the labor of the operation is reduced. Further, the joint 10 can be attached to and detached from the hose 30 by a simple operation, and the joint 10 can be detached and reused. Furthermore, since the joint 10 and the hose 30 are sealed by the second bag-shaped portion 20, the occurrence of fluid leakage due to sag and flat deformation when an O-ring is used can be reduced. Further, even if the holding force of the joint 10 is reduced, the second bag-shaped portion 20 and the first bag-shaped portion 18 may be replaced, so that the repair becomes easy.

  In addition, as shown in FIG. 4, instead of the first bag-shaped portion 18 of the joint 10, a stretchable spherical first bag-shaped portion 32 may be used. By fastening the male screw part 32A of the first bag-like part 32 to the female screw part 22A of the connecting pipe 22, the second bag-like part 20 and the first bag-like part 32 are integrated. The first bag-like portion 32 is disposed inside the protection portion 16 </ b> A of the nut 16.

  FIG. 5 shows a joint 40 according to a second embodiment of the present invention.

  In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment, and the overlapping description is abbreviate | omitted.

  The joint 40 is formed with a long male screw 44 in the axial direction in which the nut 16 is screwed onto the peripheral surface of the joint body 12. On the opposite side of the nut 16 from the first bag-like portion 18, when the nut 16 is moved to the protruding portion 14 side, a lock nut 42 as a detent for the nut 16 is fastened to the male screw 44. Thereby, the nut 16 is not loosened to the opposite side to the first bag-like portion 18 by an external force when the joint 40 is used, and the hose 30 can be prevented from being carelessly detached from the joint 40.

  FIG. 5 shows a joint 50 according to a third embodiment of the present invention.

  In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment, and the overlapping description is abbreviate | omitted.

  In the joint 50, a resin collar 52 that is movable in the direction of crushing the first bag-like portion 18 is extrapolated on the peripheral surface of the joint body 12. Further, a resin-made color lock 54 is provided on the peripheral surface of the joint body 12 at a position protruding between the collar 52 and the first bag-shaped portion 18. The outer peripheral side of the color lock 54 is bent in the direction of the first bag-like portion 18, and an engaging claw 54A is formed on the inner diameter side of the tip. Further, the outer peripheral portion of the collar 52 protrudes in the upper direction of the first bag-shaped portion 18, and an engaging groove 52 </ b> A for engaging the engaging claw 54 </ b> A is formed on the outer peripheral surface of the protruding portion. As the material of the color 52 and the color lock 54, for example, a resin such as PP, polybutylene terephthalate, or POM is used.

  In this joint 50, as shown in FIG. 7, the collar 52 is moved in the direction of the color lock 54 (arrow B direction), whereby the first bag-like portion 18 is crushed and the fluid 24 moves through the connecting pipe 22. Then, the second bag-like portion 20 is expanded. When the hose 30 is held by the second bag-like portion 20, the engagement claw 54A of the collar lock 54 is engaged with the engagement groove 52A of the collar 52 by elastic deformation, and the collar 52 is locked.

  In such a joint 50, the joint 50 can be fixed to the hose 30 with one touch by moving the collar 52 in the direction of the collar lock 54 and engaging the engaging claw 54A with the engaging groove 52A. Further, when the joint 50 is used, the engagement claw 54A and the engagement groove 52A are not disengaged and the collar 52 does not move to the opposite side of the second bag-shaped portion 20, and the hose 30 is not connected to the joint body 12. It is prevented from coming off.

  FIG. 8 shows a joint 60 according to a fourth embodiment of the present invention.

  In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment, and the overlapping description is abbreviate | omitted.

  In the joint 60, a washer 62 is disposed between the first bag-like portion 18 on the peripheral surface of the joint body 12 and the nut 16. When the nut 16 is moved in the direction of the first bag-shaped portion 18, the nut 16 is pushed and the washer 62 moves to crush the first bag-shaped portion 18. For this reason, when tightening the nut 16, the washer 62 can prevent the nut 16 from biting into the first bag-shaped portion 18, and the first bag-shaped portion 18 can be prevented from breaking.

  In the above-described embodiment, the first bag-like portion and the second bag-like portion are not limited to the above-mentioned shapes, and can be appropriately set as long as the hose can be held by the second bag-like portion. .

It is a half cut sectional view showing the joint of a 1st embodiment of the present invention. (A) is a half-cut sectional view showing a state in which the joint shown in FIG. 1 is mounted on a hose, and (B) is a sectional view of the joint taken along line AA. It is the disassembled perspective view which shows the 1st bag-like part used for the joint shown in FIG. 1, a connection pipe, and the 2nd bag-like part, and the perspective view at the time of a coupling | bonding. It is a disassembled perspective view which shows the modification of a 1st bag-like part, a connecting pipe, and a 2nd bag-like part, and a perspective view at the time of a coupling | bonding. It is a half section view showing a joint of a 2nd embodiment of the present invention. It is a half section view showing a joint of a 3rd embodiment of the present invention. (A) is a half-cut sectional view showing a state in which the joint shown in FIG. 6 is mounted on a hose, and (B) is a sectional view of the joint taken along line AA. It is a half cut sectional view showing the joint of a 4th embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Joint 12 Joint main body 14 Protruding part 14A Opening hole 15 Male thread 16 Nut (moving member)
18 1st bag-shaped part 18A Male thread part 20 2nd bag-shaped part 22 Connecting pipe 22A Female thread part 24 Fluid 26 Protrusion part 30 Hose (tube)
32 1st bag-like part 32A Male thread part 40 Joint 42 Lock nut (anti-rotation)
44 Male thread 50 Joint 52 Collar (moving member)
52A Engaging groove 54 Color lock 54A Engaging claw 60 Joint 62 Washer

Claims (6)

A joint that is detachably fixed to a pipe body,
A joint body inserted into the pipe body;
A protrusion that projects from the peripheral surface of the joint body, contacts the mouth of the tube, and positions the tube;
A movable member provided so as to be movable in the axial direction of the tubular body, and fixed;
A stretchable first bag-like portion provided between the projecting portion and the moving member and enclosing a fluid therein;
A stretchable second bag-shaped portion provided between the joint body and the pipe body, in which a fluid is sealed and communicated with the first bag-shaped portion;
A joint characterized by comprising:   The said 2nd bag-shaped part is a cyclic | annular body, The said 2nd bag-shaped part is connected to the said 1st bag-shaped part through the connection pipe which penetrated the said protrusion part, The Claim 1 characterized by the above-mentioned. Fittings.   The joint according to claim 1, wherein the moving member is a nut that is screwed into a threaded portion of a peripheral surface of the joint body.   The joint according to claim 3, wherein the joint body is provided with a detent that restricts the nut from separating from the protrusion.   The moving member is made of an elastic member, and includes an engaging portion that engages with an engaged portion formed in the protruding portion by elastic deformation when the tube body is held in the second bag-like portion. The joint according to claim 1 or 2, characterized by comprising:   6. A washer for restricting biting of the moving member into the first bag-like portion is provided between the first bag-like portion and the moving member. The joint according to any one of the above.

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