JP2006138364A - Pipe connecting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent deformation and breakage of a latch member by dispersing shearing force to the latch member over a wide range even if a force in the direction of causing one pipe member to go out of an opening of the other pipe member is generated. <P>SOLUTION: In this pipe connecting structure, a pair of engaging flat surfaces 31a, 31b opposite to each other in the axial direction of the pipe are formed in a part of the latch member 3 inserted in a window hole 22, the whole outer areas of the engaging flat surfaces 31a, 31b are positioned in the window hole 22, the whole inner areas of the engaging flat surfaces 31a, 31b are positioned in an engagement groove 12, thereby stretching the latch member 3 between the window hole 22 and the engagement groove 12 extending over the whole areas of the engaging flat surfaces 31a, 31b. When the force in the direction of causing one pipe member to go out of an opening of the other pipe member is generated, shearing force is applied to the engaging flat surfaces 31a, 31b of the latch member 3. The shearing force is dispersed widely over the whole areas of the engaging flat surfaces 31a, 31b. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pipe connection structure for connecting a pair of pipe members to each other.

  As this type of conventional pipe connection structure, for example, one end of one pipe member of a pair of pipe members is inserted into the opening of the other pipe member, and a retaining member is used in the inserted state. What prevents the other piping member from coming out of one piping member is known (for example, refer to Patent Document 1).

In this case, as shown in FIG. 4, an engagement groove A1 is provided on the outer peripheral surface of one piping member A, and a window is formed so as to face the engagement groove A1 while being inserted into the other piping member B. A hole B1 is formed in the piping member B. The retaining member C obtained by bending the wire is fitted into the window hole B1. Then, the pair of retaining portions C1 formed on the retaining member C is bridged over the engagement groove A1 and the window hole B1 at four positions indicated by D, so that the piping member A from the piping member B Omission is prevented.
Japanese Utility Model Publication No. 4-46294 (FIG. 4)

  When a force acts in a direction in which the piping member A comes out of the piping member B, the piping member A is not caught by the retaining portion C1 and does not come out from the piping member B, but a shearing force acts on the retaining portion C1. Although this shear force is dispersed at four locations indicated by D, the range in which the shear force acts is narrow even when all four locations are combined, so a large shear force acts locally on the retaining portion C1. Therefore, the retaining portion C1 may be deformed or broken.

  Further, in the above-described conventional device, the retaining portion C1 passes through the window hole B1 and fits into the engaging groove A1, so that the window hole B1 is opened with the retaining member C attached to the piping member B. It will remain as it is. Then, the problem that dust etc. penetrate | invades and accumulates in this window hole B1 also arises. Furthermore, since the tip of the retaining portion C1 protrudes from the window hole B1, there is a possibility that something will be caught in that portion and the retaining portion C1 will come off from the window hole B1.

  Then, this invention makes it a subject to provide the piping connection structure which does not produce the above-mentioned malfunction in view of said problem.

  In order to solve the above-described problem, the pipe connection structure according to the present invention is such that one end portion of a pair of pipe members is inserted into the other opening, and a retaining member is engaged with both pipe members. A pipe connection structure in which the pipes are not separated from each other, and an engagement groove is formed on the outer periphery of one of the pipes, and one of the pipes is inserted into the opening of the other pipe and faces the engagement groove. In the case where the window hole is formed in the other pipe and the retaining member is bridged between the window hole and the engaging groove, a pair of retaining members facing the axial direction of the pipe in the portion inserted into the window hole An engagement plane is formed, and the entire outer area of the engagement plane is positioned in the window hole and the entire inner area of the engagement plane is positioned in the engagement groove. And the engagement groove.

  When a force acts in a direction in which one piping member comes out of the opening of the other piping member, a shearing force acts on the engagement plane of the retaining member. Since the shear force is received over the entire area of the engagement plane, the shear force is widely distributed over the entire area of the engagement plane, and a large shear force is prevented from acting locally on the retaining member.

  Note that if the retaining member is configured to be mounted so as to substantially close the window hole, dust or the like can be prevented from entering the opening in the state where the retaining member is mounted.

  As is apparent from the above description, the present invention is able to disperse the shearing force acting on the retaining member over a wide range even if a force is generated in the direction in which one piping member exits from the opening of the other piping member. The stop member is prevented from being deformed or broken.

  Since the opening is closed with the retaining member attached, dust or the like does not enter the opening.

  With reference to FIGS. 1 to 3, in this embodiment, pipe 1 that is a piping member and pipe 2 that is a piping member are connected to each other. A small diameter portion 11 is formed at the end of the pipe 1, and the small diameter portion 11 is inserted into the opening 21 of the pipe 2. An engagement groove 12 is formed in the small diameter portion 11 so as to surround the small diameter portion 11. Further, an O-ring 13 for sealing is attached to the small diameter portion 11 on the distal end side from the engagement groove 12.

  On the other hand, a pair of window holes 22 are formed in the pipe 2 at symmetrical positions. The window hole 22 is formed at a position coincident with the engagement groove 12 in a state where the small diameter portion 11 is inserted into the opening 21. Then, the retaining member 3 is mounted in a state where the engagement grooves 12 and the window holes 22 coincide with each other.

  The retaining member 3 includes a pair of retaining portions 31 corresponding to each other and an elastic deformation portion 32 that couples both retaining portions 31. Both retaining portions 31 are fitted into the window holes 22 from the outside. Then, these retaining portions 31 are in a state of being bridged between the window hole 22 and the engaging groove 12.

  The retaining portion 31 is formed with engaging planes 31a and 31b that face each other and are parallel to each other. As described above, when the retaining portion 31 is spanned over both the window hole 22 and the engagement groove 12, the boundary line K between the window hole 22 and the engagement groove 12 coincides with the engagement planes 31a and 31b. That is, the entire outer area of the engagement planes 31 a and 31 b is located in the window hole 22 across the boundary line K, and the entire inner area is located in the engagement groove 12. In this state, for example, when a force in the direction of pulling out from the opening 21 acts on the pipe 1, the engagement groove 12 is caught by the retaining portion 31, and the small diameter portion 11 of the pipe 1 is prevented from slipping out of the opening 21.

  And the shear force in that case acts on engagement plane 31a, 31b. Since the retaining portion 31 is fitted into the window hole 22 over the entire circumferential direction of the window hole 22 as shown in the drawing, the shearing force is distributed over a wide range along the circumferential direction of the window hole 22, that is, along the boundary line K. In addition, a large shearing force does not act on the retaining portion 31 locally. Therefore, the retaining portion 31 is not deformed or broken by the shearing force.

  Further, when the retaining portion 31 fits into the window hole 22, the window hole 22 is almost blocked, so that unnecessary space does not remain. Therefore, dust or the like is placed in the window hole 22 with the retaining member 3 attached. Is prevented from entering and depositing. Furthermore, since the tip of the retaining member 31 is fitted in the window hole 22 and does not protrude to the outside, the retaining member 31 falls out of the window hole 22 by being inadvertently caught by the tip of the retaining portion 31 from the outside. Can be prevented.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention.

The figure which shows the structure of one embodiment of this invention Longitudinal section in the connected state III-III cross section Diagram showing a conventional piping connection mechanism

Explanation of symbols

1 Pipe 2 Pipe 3 Retaining Member 12 Engaging Groove 22 Window Hole 31 Retaining Part 31a Engaging Plane 31b Engaging Plane

Claims (2)

  A pipe connection structure in which one end of a pair of pipe members is inserted into the other opening and a retaining member is engaged with both pipe members so that the pipes are not separated from each other. An engagement groove is formed on the outer periphery of one pipe, and a window hole facing the engagement groove is formed in the other pipe with one pipe inserted into the opening of the other pipe. In the thing spanning the hole and the engagement groove, a pair of engagement planes facing the axial direction of the pipe are formed on the portion of the retaining member inserted into the window hole, and the entire outside area of the engagement plane is formed. Piping connection characterized in that the retaining member is bridged between the window hole and the engagement groove over the entire area of the engagement plane by being positioned in the window hole and the entire inner area of the engagement plane is positioned in the engagement groove. Construction. The piping connection structure according to claim 1, wherein the retaining member is mounted so as to substantially close the window hole.

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