JP4048936B2 - Piping joint - Google Patents

Piping joint Download PDF

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Publication number
JP4048936B2
JP4048936B2 JP2002348868A JP2002348868A JP4048936B2 JP 4048936 B2 JP4048936 B2 JP 4048936B2 JP 2002348868 A JP2002348868 A JP 2002348868A JP 2002348868 A JP2002348868 A JP 2002348868A JP 4048936 B2 JP4048936 B2 JP 4048936B2
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JP
Japan
Prior art keywords
piping
pipe
locking
joint
groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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JP2002348868A
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Japanese (ja)
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JP2004183703A (en
Inventor
誠 吉野
Original Assignee
株式会社デンソー
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Priority to JP2002348868A priority Critical patent/JP4048936B2/en
Publication of JP2004183703A publication Critical patent/JP2004183703A/en
Application granted granted Critical
Publication of JP4048936B2 publication Critical patent/JP4048936B2/en
Expired - Fee Related legal-status Critical Current
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a piping joint suitable for connecting a fluid piping member, for example, a refrigerant piping member of a refrigeration cycle.
[0002]
[Prior art]
Generally, in a pipe joint for connecting refrigerant pipe members for a refrigeration cycle, when connecting a first pipe member as a male side joint and a second pipe member as a female side joint, the number of parts of the pipe joint is reduced. Therefore, it has been cited as an issue to make the piping work easy or to prevent erroneous assembly. For example, in a conventional pipe joint, it is used for a pipe joint used in a pipe joint structure (Patent Document 1) as shown in FIG. 18 or a pipe joint structure (Patent Document 2) as shown in FIG. There are known pipe joints.
[0003]
In the former pipe joint shown in Patent Document 1, after connecting the first pipe member 100 having the flange 101 that expands from the outer peripheral surface of the pipe and the second pipe member 105 having the tapered outer surface 106. Thus, the first fixing member 110 and the second fixing member 115 as pipe joints for fixing both the piping members 100 and 105 are configured to cover the first piping member 100 and the second piping member 105, respectively. Has been. The first fixing member 110 is formed in a cylindrical shape and includes a spiral protruding portion 111 inside, and the second fixing member 115 is formed in a cylindrical shape and can be engaged with the protruding portion 111. Part 116 is provided. Then, after the first piping member 100 is inserted into the second piping member 105, the claw portion 116 is engaged with the protrusion 111 by rotating the second fixing member 115 relative to the first fixing member 110. As a result, the first fixing member 110 and the second fixing member 115 are locked, and accordingly, the hook engaging portion 112 formed at the tip of the cylindrical portion of the first fixing member 110 is the first fixing member 110. The first piping member 100 and the second piping member are pressed by pressing the flange portion 101 of the piping member 100 and the tapered inner surface 117 of the second fixing member 115 pressing the tapered outer surface 106 of the second piping member 105. 105 can be connected.
[0004]
In the latter pipe joint structure shown in Patent Document 2, when connecting the pipe member 120 having the annular protrusion 122 at the insertion part 121 to the insertion receptacle 126 of the female side joint 125, a part of the circumference is pivoted. By fitting a ring-shaped fixing member 130 cut out along the direction between the two, the attachment and detachment of the piping member 120 in the axial direction is restricted. The fixing member 130 is formed as an elastic stopper having elasticity in the circumferential direction, and includes an arcuate ridge 131 that fits into a groove 127 formed in the circumferential direction at the insertion receiving port 126 of the female side joint 125. When the piping member 120 is inserted into the insertion receiving port 126 of the female side joint 125 and the tip surface of the annular projection 122 abuts on the receiving surface 128 of the female side joint 125, the arcuate ridge 131 causes the annular projection 122 to become female. It arrange | positions so that it may clamp between the receiving surfaces 128 of the side coupling 125. FIG.
[0005]
Accordingly, the arcuate ridge 131 is inserted into the groove 127 formed in the insertion receiving port 126 of the female joint 125 and restricts the rearward movement of the annular protrusion 122, whereby the female joint 125 of the piping member 120 is regulated. Desorption from can be prevented. Moreover, since a part of the circumference of the fixing member 130 is cut out along the axial direction, the fixing member 130 has elasticity in the circumferential direction, so that the arc-shaped ridge 131 can be easily inserted into the groove 127 of the insertion receptacle 126. Can be fitted.
[0006]
[Patent Document 1]
JP-A-7-332563 (pages 4-5, FIG. 1)
[Patent Document 2]
Japanese Patent Laid-Open No. 8-200277 (pages 3 to 6, FIG. 1)
[0007]
[Problems to be solved by the invention]
However, among the pipe joints shown in the conventional publication, in the former case, the first fixing member 110 and the second fixing member 115 are manufactured separately from the first piping member 100 and the second piping member 105. Since the projections 111 and the claw portions 116 are respectively provided and engaged with each other, the number of parts increases, and the molding cost and assembly work cost of both the fixing members 110 and 115 are increased. It was.
[0008]
In the latter case, since the fixing member 130 as a pipe joint has directionality when attached, the contact portion between the pipe member 120 and the female side joint 125 does not necessarily match when fitted in the left-right reverse direction. Not limited to this, there is a possibility that a gap may be formed at the contact portion of each other or the assembly may be impossible.
[0009]
Accordingly, the present invention solves the above-described problems, and aims to provide a pipe joint that facilitates assembly and does not cause erroneous assembly, as well as reducing costs.
[0010]
[Means for Solving the Problems]
In order to solve the above-described problems, a pipe joint according to the present invention has a cylindrical shape in the pipe joint for connecting and fixing the first pipe member and the second pipe member. A plurality of first groove portions and second groove portions are alternately formed from both ends of the formed main body at equal intervals, Formed between the first groove portions or between the second groove portions. The thin end portions at both ends of the main body are provided with locking portions that can be locked with the first piping member or the second piping member.
[0011]
Since the end surfaces of the first groove portion and the second groove portion are opened, the pipe joint attached to the first pipe member or the second pipe member is inserted when any of the pipe members on the insertion side is inserted. In addition, when the thin-walled portion comes into contact with the insertion portion of any piping member, the diameter is increased and any piping member can be inserted.When the insertion of any piping member is completed, the elastic restoring force is applied to any piping member. It will be locked by the locking part.
[0012]
Therefore, since either the first piping member or the second piping member can be inserted and fixed to the mating piping member with one touch, the assembling work can be easily performed in a short time. Moreover, since the same groove and locking parts are formed on both the left and right ends of the pipe joint, even if it is mounted in the left and right direction, it will not interfere with the assembly and will cause incorrect assembly. Absent.
[0013]
In the invention according to claim 2, the pipe joint for connecting and fixing the first pipe member and the second pipe member is a pair of the first pipes alternately from both ends of the cylindrical body. The groove and the second groove are formed at positions facing the axis, Formed between the first groove portions or between the second groove portions. Thin part end Are provided with a pair of locking portions that can be locked with the first piping member or the second piping member.
[0014]
That is, in this invention, the virtual straight line connecting the center lines of the groove portions formed at the respective end portions is formed in a cross shape on the left end side and the right end side.
[0015]
Since the end surfaces of the first groove portion and the second groove portion are opened, the pipe joint attached to the first pipe member or the second pipe member is inserted when any of the pipe members on the insertion side is inserted. In addition, when the thin-walled portion comes into contact with the insertion portion of any piping member, the diameter is increased and any piping member can be inserted.When the insertion of any piping member is completed, the elastic restoring force is applied to any piping member. It will be locked by the locking part.
[0016]
Accordingly, since either the first piping member or the second piping member can be inserted and fixed to the mating piping member with one touch, the assembly work can be easily performed in a short time as in the first aspect of the invention. It can be carried out. In addition, since the same groove and locking portions are formed on the left and right ends of the pipe joint, even if the pipe joint is mounted in the left and right direction, the assembly is not hindered and no erroneous assembly occurs.
[0017]
In the invention described in claim 3, when the first piping member or the second piping member is inserted, the locking portion in the invention described in claim 1 or 2 is the first piping member or the second piping member. When contacted, the diameter is increased by being guided by the tapered surface portion formed in the first locking portion or the second locking portion, and when the insertion portion of the first piping member or the second piping member exceeds the tapered surface portion, The first locking portion or the second locking portion is reduced in diameter by the elastic restoring force and locked to the outer peripheral surface of the first piping member or the second piping member.
[0018]
Therefore, the first piping member and the second piping member can be assembled with one touch, and the assembling work can be performed in a short time.
[0019]
In the invention according to claim 4, since the thin portion is formed of an elastic material having elasticity in the axial direction and the radial direction, the pipe joint is in close contact with the outer peripheral surface of the first pipe member or the second pipe member. Thus, it can be locked and the sealing performance is improved, and the operation described in claim 3 can be smoothly performed without causing damage to the thin-walled portion.
[0020]
In the invention of claim 5, when the first piping member or the second piping member is inserted into the pipe joint, the outer diameter of the seal member mounted on the first piping member or the second piping member is In the natural state, the first pipe member and the second pipe member can be connected without damaging the outer peripheral surface of the seal member because it is formed smaller than the inner diameter of the thin portion of the pipe joint.
[0021]
In the invention described in claim 6, when the first piping member or the second piping member is inserted into the pipe joint, the inner diameter of the thin portion of the pipe joint in the natural state is the first piping member or the second piping. Since the outer diameter of the member is smaller than the outer diameter of the member, when the first piping member or the second piping member is locked by the elastic restoring force of the thin portion, the first piping member or the second piping member The backlash with the outer peripheral surface can be absorbed and the sealing performance can be improved.
[0022]
The invention according to claim 7 is a pipe joint structure in which the first pipe member and the second pipe member are connected by a pipe joint, and the first pipe member and the second pipe member are connected and fixed. In the joint, a plurality of first groove portions and second groove portions are alternately formed at equal intervals from both ends of the cylindrically formed main body, Formed between the first groove portions or between the second groove portions. Thin part end Is provided with a locking portion that can be locked with the first piping member or the second piping member.
[0023]
Since the end surfaces of the first groove portion and the second groove portion are opened, the pipe joint attached to the first pipe member or the second pipe member is inserted when any of the pipe members on the insertion side is inserted. In addition, when the thin-walled portion comes into contact with the insertion portion of any piping member, the diameter is increased and any piping member can be inserted.When the insertion of any piping member is completed, the elastic restoring force is applied to any piping member. It will be locked by the locking part.
[0024]
Therefore, since either the first piping member or the second piping member can be inserted and fixed to the mating piping member with one touch, the assembling work can be easily performed in a short time. Moreover, since the same groove and locking parts are formed on both the left and right ends of the pipe joint, even if it is mounted in the left and right direction, it will not interfere with the assembly and will cause incorrect assembly. Absent.
[0025]
In the invention according to claim 8, since the first piping member and the second piping member according to the invention according to claim 7 are brought into contact with each other by the tapered surfaces, they are connected and fixed by a pipe joint. In this state, since the pipe joint is formed with elasticity in the axial direction, the tapered surfaces are brought into pressure contact with each other, so that contact can be made in a wide range and the sealing performance can be improved.
[0026]
Furthermore, in the ninth aspect of the present invention, the female side joint of the second piping member according to the seventh aspect of the invention is extended to the first piping member side to provide a window portion. When the piping joint is mounted on the second piping member, by engaging the locking portion of the piping joint with the window portion, the load generated in the axial direction is not only the locking portion of the piping joint but also the female-side joint. Therefore, it is possible to reduce the fatigue applied to the engaging portion of the pipe joint and to increase the life of the pipe joint.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0028]
As shown in FIGS. 1 to 3, the pipe joint of the first embodiment is configured such that the first pipe member 2 having a male side joint is inserted and connected to the second pipe member 3 having a female side joint. The second piping member 3 is configured to be locked to the first piping member 2 side by a pipe joint (hereinafter referred to as a locking member) 10 attached to the distal end portion of the piping member 2.
[0029]
The first piping member 2 is formed in a cylindrical shape so as to circulate the refrigerant, and is formed as a male-side joint portion 22 whose insertion-side distal end portion has a diameter larger than that of the cylindrical portion 21. In the joint portion 22, a groove 23 into which the O-ring 5 is inserted is formed, and an expanded portion 24 is formed on the side opposite to the distal end portion of the groove 23. A tapered outer surface 25 having a small diameter is formed, and a stepped surface between the cylindrical portion 21 and the expanded portion 24 disposed at the rear portion of the expanded portion 24 is used as a locking surface 26 that locks the locking portion of the locking member 10. Is formed.
[0030]
The second piping member 3 is formed in a cylindrical shape for circulating the refrigerant, and is formed as a female-side joint portion 32 having a distal end portion on the insertion side whose diameter is larger than that of the cylindrical portion 31. The joint portion 32 includes an insertion port 33 into which the joint portion 22 of the first piping member 2 is fitted, and an insertion port distal end expanding portion 35 having a tapered inner surface 34 that contacts the tapered outer surface 25 of the first piping member 2. I have. Further, the rear end surface of the joint portion 33 is formed as an engagement surface 36 that can be engaged with the first locking portion 14 of the locking member 10 or the inner wall surface of the second locking portion 15.
[0031]
The locking member 10 is formed of a resin material, a metal material, or a mixture of a resin material and a metal material and integrally molded to have elasticity in the axial direction and the radial direction. 7, in the embodiment, a thin ring shape is formed so as to be attached to the outer peripheral surface of the first piping member 2, and groove portions each having an open end surface are formed from both ends of the ring-shaped main body ring portion 11. The first groove portion 12 and the second groove portion 13 are formed alternately at symmetrical positions on the circumference.
[0032]
The first groove portion 12 is formed to extend from the right end of the main body ring portion 11 to the vicinity of the left end in FIG. 4 and opens at the right end. In the embodiment, a pair of the first groove portions 12 is formed so as to face the symmetrical position with respect to the axis of the main body ring portion 11.
[0033]
The second groove portion 13 is formed by extending from the left end of the main body ring portion 11 to the vicinity of the right end in FIG. 5 at a position where the first groove portion 12 is rotated 90 ° with respect to the axis of the main body ring portion 11. It is open. In the embodiment, a pair of the second groove portions 13 is formed so as to face the symmetrical positions with respect to the axis of the main body ring portion 11.
[0034]
The thin portions where the groove portions at both ends of the main body ring portion 11 are not formed are provided with the locking portions protruding toward the axial center to form the first locking portion 14 and the second locking portion 15, respectively. is doing.
[0035]
As shown in FIG. 4, the first locking portion 14 is disposed on both sides of the first groove portion 12 from the thin end portion 11a of the main body ring portion 11 where the first groove portion 12 is not formed. A pair of locking portions 14 is formed so as to protrude toward the axial center and face the symmetrical position. The inner peripheral surface of the first locking portion 14 forms a straight portion 14a and a tapered surface portion 14b having a larger diameter from the straight portion 14a toward the end surface.
[0036]
The second locking portions 15 are arranged on both sides of the second groove portion 13 from the thin end portion 11b of the main body ring portion 11 where the second groove portion 13 is not formed, and project toward the axial center, respectively. A pair of locking portions 15 is formed so as to face the symmetrical position. The inner peripheral surface of the second locking portion 15 forms a straight portion 15a and a tapered surface portion 15b having a larger diameter from the straight portion 15a toward the end surface.
[0037]
Note that the first groove portion 12 or the second groove portion 13 is not formed at two locations on the circumference, but may be formed at three or more locations as long as they are equidistant from the axial center. Or the 2nd latching | locking part 15 may be three or more places corresponding to a groove part, even if the set which pinched | interposed the groove part is not two places.
[0038]
Next, a procedure for configuring the pipe joint structure configured as described above will be described with reference to FIGS. 1 and 8 to 9.
[0039]
As shown in FIG. 8, the locking member 10 abuts the inner wall surface of one second locking portion 15 against the rear end locking surface 26 of the expanded portion 24 of the first piping member 2, and the second The linear portion 15 a of the locking portion 15 is mounted so as to engage with the outer peripheral surface of the cylindrical portion 21. When this locking member 10 is attached to the first piping member 2, the thin end portion 11 b where the second groove portion 12 on the second locking portion 15 side of the main body ring portion 11 is not formed is expanded and opened. Thus, the locking member 10 can be easily attached to the joint portion 22 of the first piping member 2.
[0040]
In this state, when the joint portion 32 of the second piping member 3 is disposed at a position facing the joint portion 22 of the first piping member 2, the first locking portion 14 of the locking member 10 becomes the second. It will be arranged at a position facing the joint part 32 of the piping member 3.
[0041]
Next, as shown in FIG. 9, the first piping member 2 fitted with the locking member 10 is moved into the second piping member 3 or the second piping member 3 is advanced into the first piping member 2. Is connected, the tip expansion portion 35 of the joint portion 32 of the second piping member 3 is brought into contact with the first locking portion 14 of the locking member 10, thereby expanding the tip of the second piping member 3. The portion 35 presses the tapered surface portion 14b of the first locking portion 14 of the locking member 10, so that the first locking portion 14 is moved from the inner end portion of the second locking portion 15 to the thin end portion 11b. Bend in the direction of increasing the diameter around the center.
[0042]
When the tip expanded portion 35 of the second piping member 3 further enters the locking member 10, the tip expanded portion 35 presses the thin portion along the inner peripheral surface of the main body ring portion 11. The joint portion 22 of the first piping member 2 is accommodated in the insertion port 33 of the second piping member 3 while moving.
[0043]
The tip expanded portion 35 of the second piping member 3 further enters the tapered outer surface 25 formed in the expanded portion 24 of the first piping member 2 by entering the distal expanded portion 35 of the second piping member 3. When the taper inner surface 34 formed on the inner peripheral surface of the first contact portion 14 abuts, as shown in FIG. 1, the first locking portion 14 is elastically restored, and the inner wall surface of the first locking portion 14 is the second pipe. While engaging with the engaging surface 36 of the joint part 22 of the member 3, the linear part 14a engages with the general outer peripheral surface (cylinder part 31) of the second piping member 3.
[0044]
The locking member 10 is formed such that the first groove portion 12 and the second groove portion 13 are formed at positions where the phase of the first groove portion 12 and the second groove portion 13 are shifted from each other by 90 ° with respect to the axial center. Therefore, even when the locking member 10 is arranged in the left and right reverse direction and attached to the first piping member 2, the second locking portion 15 inserts the second piping member 3 Since the same operation as the first locking portion 14 described above is performed, the second piping member 3 can be inserted into the first piping member 2 without causing any trouble. Can be done.
[0045]
Therefore, if the 1st piping member 2 and the 2nd piping member 3 are connected using the locking member 10 of embodiment, the 1st locking arrange | positioned at one edge part of the locking member 10 will be described. Since the portion 14 or the second locking portion 15 is formed so that the diameter can be increased or reduced when the second piping member 3 is inserted by the formation of the first groove portion 12 or the second groove portion 13, with one touch. The second piping member 3 can be connected to the first piping member 2. Moreover, since the thin part of the main body ring 11 has elastic force in the axial direction and the radial direction, the first locking part 14 of the locking member 10 is connected to the rear surface of the joint part 32 in the second piping member 3. When engaging with the engagement surface 36 and the outer peripheral surface 31 of the general portion, the second piping member 3 can be fitted tightly and pressed to the first piping member 2 side. Desorption from the first piping member 2 can be prevented.
[0046]
In addition, the piping joint of this invention is not limited to said form, For example, the latching member 10 is attached to the 2nd piping member 3 as a 2nd form, and the 1st piping member 2 is 2nd. It can also be inserted into the piping member 3 and connected.
[0047]
In this case, as shown in FIG. 10, the locking member 10 abuts the inner wall surface of the first locking portion 14 on the rear end engaging surface 36 of the joint portion 32 of the second piping member 3, The linear portion 14 a of the locking portion 14 is mounted so as to be locked to the outer peripheral surface of the cylindrical portion 31. When this locking member 10 is attached to the second piping member 2, the thin end portion 11 a where the second groove portion 13 on the locking portion 14 side of the main body ring portion 11 is not formed is expanded and opened. The locking member 10 can be easily attached to the joint portion 32 of the second piping member 3.
[0048]
In this state, when the joint portion 22 of the first piping member 2 is arranged at a position facing the joint portion 32 of the second piping member 3, the first locking portion 15 of the locking member 10 is the first. It will be arranged at a position facing the joint portion 22 of the piping member 2.
[0049]
Next, as shown in FIG. 11, the second piping member 3 fitted with the locking member 10 is caused to enter the first piping member 2 or the first piping member 2 into the second piping member 3, and both When connected, the distal end portion of the joint portion 22 of the first piping member 2 is accommodated in the insertion port 33 of the second piping member 3, and the joint portion 22 of the first piping member 2 is further connected to the second piping member 3. When the expansion portion 24 of the first piping member 2 presses the tapered surface portion 15b of the second locking portion 15 of the locking member 10 when entering the insertion port 33, the second locking portion 15 is moved. The diameter is increased from the inner end portion of the first locking portion 14 around the thin end portion 11a.
[0050]
Then, as shown in FIG. 12, the tapered outer surface 25 formed on the expanded portion 24 of the first piping member 2 is the tapered inner surface 34 formed on the inner surface of the distal end expanded portion 35 of the second piping member 3. The first locking portion 15 is elastically restored, and the inner wall surface of the second locking portion 15 is brought into contact with the rear end locking surface 26 formed in the expanded portion 24 of the first piping member 3. While engaging, the linear part 15a latches to the general outer peripheral surface (cylinder part 21) of the first piping member 2.
[0051]
Therefore, the first piping member 2 and the second piping member 3 are mounted by attaching the locking member 10 of the first or second configuration to either the first piping member or the second piping member. If the connection is made, the first locking portion 14 or the second locking portion 15 arranged at one end of the locking member 10 is formed into the second pipe by forming the first groove portion 12 or the second groove portion 13. Since it is formed so that the diameter can be increased or decreased when the member 3 is inserted, the second piping member 3 can be connected to the first piping member 2 with one touch. Moreover, since the thin part of the main body ring 11 has an elastic force in the axial direction and the radial direction, the second locking part 15 of the locking member 10 is located behind the joint part 22 of the first piping member 2. When engaging the end locking portion 26 and the outer peripheral surface 21 of the general portion, the first piping member 2 can be tightly fitted and pressed toward the second piping member 3 side, so that the first piping member 2 can be pressed. Desorption from the second piping member 3 can be prevented.
[0052]
Further, since the locking member 10 can operate in the same manner even if it is mounted reversely in the left-right direction, the second piping member 3 can be connected to the first piping member 2 with one touch without causing erroneous assembly. Can do.
[0053]
Further, in the third embodiment, as shown in FIGS. 13 to 15, the second pipe member 3 </ b> A is provided with an extended cylinder part 37 extending forward from the tip expanded part 35 </ b> A, and the extended cylinder part 37 has a shaft. It is also possible to form the pair of window portions 38 at positions facing the heart so that the second locking portion 15 of the locking member 10 can be inserted. The outer diameter of the extended cylindrical portion 37 is formed to be substantially the same as the outer diameter of the tip expanding portion 35 in the first embodiment.
[0054]
When the first piping member 2 is inserted and connected in a state where the locking member 10 is attached to the second piping member 3A, the first piping member 2 is operated by the same operation as that described with reference to FIGS. Can be inserted and connected to the second piping member 3.
[0055]
That is, as shown in FIG. 13, after the joint portion 22 of the first piping member 2 is arranged at a position facing the extended cylindrical portion 37 of the second piping member 3A, as shown in FIG. When the second piping member 3A fitted with the stop member 10 is inserted into the first piping member 2 or the first piping member 2 and connected to each other, the joint of the first piping member 2 is connected. When the distal end portion of the portion 22 is accommodated in the insertion port 33 of the second piping member 3 and the joint portion 22 of the first piping member 2 enters the insertion port 33 of the second piping member 3, When the expanded portion 24 of the first piping member 2 presses the tapered surface portion 15b of the second locking portion 15 of the locking member 10, the second locking portion 15 is connected to the inner end of the first locking portion 14. Then, the diameter of the second locking portion 15 is increased from the window portion 38 by expanding the diameter around the thin end portion 11a.
[0056]
And as shown in FIG. 15, the taper outer surface 25 formed in the expansion part 24 in the 1st piping member 2 is the taper inner surface 34 formed in the inner surface of the front-end expansion part 35 of the 2nd piping member 3. As shown in FIG. The first locking portion 15 is elastically restored and enters the window portion 38 of the extended cylindrical portion 37 so that the inner wall surface of the second locking portion 15 is expanded by the first piping member 3. While engaging with the rear end locking surface 26 formed in the enlarged portion 24, the linear portion 15 a is locked to the outer peripheral surface (cylindrical portion 21) of the general portion of the first piping member 2.
[0057]
The second locking portion 15 of the locking member 10 is supported by the window portion 38 formed in the extended cylindrical portion 37 of the second piping member 3A, and the first direction is restrained in the axial direction. The piping member 2 is fixed to the second piping member 3.
[0058]
With this configuration, the second locking portion 15 of the locking member 10 causes the second piping member 3 </ b> A to react with a force that imparts the expansion portion 24 of the first piping member 2 to the second piping member 3 </ b> A side. Therefore, the fatigue of the locking member 10 can be reduced and the life of the locking member 10 can be extended.
[0059]
Further, as shown in FIG. 16, the outer peripheral surface of the joint portion 32A of the second piping member 3A in the third mode is made small in diameter, and the diameter expansion amount of the second locking portion 15 of the locking member 10 is reduced. You can also. In this case, the joint portion 22A of the first piping member 2A is formed slightly larger than the outer diameter of the cylindrical portion 21, and the expanded portion 24 having the above-described configuration is deleted. Then, the joint portion 32A of the second piping member 3B has a smaller diameter than that of the above-described form and includes the extended cylindrical portion 37B because the expanded portion is eliminated from the joint portion 22A of the first piping member 2A. To form. A window portion 38B is formed in the extended cylindrical portion 37B, and the second locking portion 15 of the locking member 10 in which the first locking portion 14 is locked to the end surface of the joint portion 32B of the second piping member 3B is provided. It is configured to be insertable into the window portion 38B.
[0060]
With this configuration, the diameter of the second locking portion 15 of the locking member 10 can be reduced, the fatigue of the locking member 10 can be reduced, and the life can be extended. Costs can be reduced by reducing the number of processing steps due to a decrease in the outer diameter of the member 2A and the second piping member 3B.
[0061]
Further, as shown in FIG. 17, the inner diameters of the inner peripheral surfaces (straight portions 14 a and 15 a) of the first locking portion 14 and the second locking portion 15 of the locking member 10 are set to the joint portions 22 of the first piping member 2. When the locking member 10 is mounted on the second piping member 3 </ b> C, the inner diameter of the first locking portion 14 or the second locking portion 15 is larger than the outer diameter of the O-ring 5 mounted on the inner surface. The O-ring 5 can be inserted without rubbing. In this case, it is performed by forming the outer diameter of the joint portion 22 of the first piping member 2 to be equal to or smaller than that of the cylindrical portion 21, and if necessary, the joint portion 32C of the second piping member 3C. Is formed thicker than the joint portion 32 or 32B of the above-described form. Thereby, damage to the O-ring 5 can be prevented.
[0062]
Further, if the inner diameter of the straight portion 14a (or 15a) in the first locking portion 14 (or the second locking portion 15) of the locking member 10 is smaller than the outer diameter of the tube portion 21, the first locking portion 14 (or the second locking portion 15) can be fitted tightly when locking to the first piping member 2 or the second piping member 3, and the first piping member 2 and the second piping member are connected to each other. Can be fixed without rattling.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view showing a pipe joint structure according to a first embodiment of the present invention.
FIG. 2 is a view taken in the direction of arrow A in FIG.
FIG. 3 is a view taken in the direction of arrow B in FIG. 1;
4 is a partial cross-sectional view showing a locking member as a pipe joint in FIG. 1. FIG.
5 is a view taken in the direction of arrow D in FIG. 4;
6 is a cross-sectional view taken along the line CC in FIG.
7 is a view taken in the direction of arrow E in FIG.
FIG. 8 is a partial cross-sectional view showing the operation of inserting the second piping member into the first piping member.
FIG. 9 is a partial cross-sectional view showing an operation of inserting the second piping member into the first piping member.
FIG. 10 is a partial cross-sectional view showing an operation of inserting the first piping member in the second embodiment into the second piping member.
FIG. 11 is a partial cross-sectional view showing an operation of inserting the second piping member into the first piping member.
FIG. 12 is a partial cross-sectional view showing a state where the first piping member and the second piping member are connected.
FIG. 13 is a partial cross-sectional view showing an operation of inserting the first piping member into the second piping member in the third embodiment.
FIG. 14 is a partial cross-sectional view showing the operation of inserting the second piping member into the first piping member.
FIG. 15 is a partial cross-sectional view showing a state where the first piping member and the second piping member are connected to each other.
FIG. 16 is a partial cross-sectional view showing another form of the joint portion of the second piping member in FIG. 15;
FIG. 17 is a partial cross-sectional view showing another form of the pipe joint structure in FIG. 15;
FIG. 18 is a partial cross-sectional view showing a conventional pipe joint structure.
FIG. 19 is a partial cross-sectional view showing still another conventional pipe joint structure.
[Explanation of symbols]
2 First piping member
3, 3A Second piping member
5 O-ring
10 Locking member
11 Body ring
12 First groove
13 Second groove
14 First locking portion
14a Straight line part (straight line engagement part)
14b Tapered surface
15 Second locking part
15a Straight line part (straight line engagement part)
22 Joint part
24 Expansion part
25 Taper outer surface
26 Locking surface
32, 32A Joint part
33 insertion slot
34 Tapered inner surface
36 engagement surface
37 Extended tube
38 windows

Claims (9)

  1. A pipe joint connecting a first pipe member arranged with a male side joint and a second pipe member arranged with a female side joint,
    A plurality of first groove portions extending from the end surfaces are formed at equal intervals from the one end of the cylindrically formed main body to the axis,
    At an intermediate position between the plurality of first groove portions, a plurality of second groove portions extending from an end surface opposite to the first groove portion are formed,
    At both ends of the main body, locking portions that protrude toward the axial center are formed at a plurality of locations on the ends of the thin portions formed between the first groove portions or between the second groove portions,
    The locking portion at the end of the thin portion formed between the first groove portions and the locking portion at the end of the thin portion formed between the second groove portions are bilaterally symmetrical with respect to the central portion in the axial direction. Formed,
    A pipe joint mounted on either the first pipe member or the second pipe member.
  2. A pipe joint connecting a first pipe member arranged with a male side joint and a second pipe member arranged with a female side joint,
    A pair of first groove portions extending from the end faces are formed at positions facing the axial center from one end of the cylindrically formed main body,
    At a position rotated by 90 ° with respect to the first groove portion, a pair of second groove portions extending from the end surface opposite to the first groove portion are formed,
    At both ends of the main body, at the positions where the locking portions protruding toward the shaft center are opposed to the shaft center at the thin-walled portion ends formed between the first groove portions or between the second groove portions. A pair is formed,
    The locking portion at the end of the thin portion formed between the first groove portions and the locking portion at the end of the thin portion formed between the second groove portions are bilaterally symmetrical with respect to the central portion in the axial direction. Formed,
    A pipe joint mounted on either the first pipe member or the second pipe member.
  3.   The locking portion includes a linear engagement portion that engages with the first piping member or the second piping member, and a tapered surface portion that is disposed from the linear engagement portion toward an end surface. The pipe joint according to claim 1 or 2, wherein the pipe joint is provided.
  4.   4. The pipe joint according to claim 1, wherein the thin portion is formed of an elastic material having an elastic force in a radial direction or an axial direction.
  5.   The male joint of the first piping member is provided with a sealing member, and the outer diameter of the sealing member is smaller than the inner diameter of the engaging portion of the piping joint. A pipe joint according to 2, 3 or 4.
  6.   6. The inner diameter of the locking portion is formed to be smaller than the outer diameter of the general portion of the first piping member or the second piping member. Pipe fittings.
  7. A pipe joint structure for connecting a first pipe member arranged with a male side joint and a second pipe member arranged with a female side joint with a pipe joint,
    The pipe joint is formed with a plurality of first groove portions extending from the end face at positions equidistant from the axial center from one end of the cylindrically formed main body, and the plurality of first A plurality of second groove portions extending from an end surface opposite to the first groove portion are formed at an intermediate position between the groove portions, and between the first groove portions or the second groove at both end portions of the main body. At the end of the thin part formed between the groove parts, locking parts protruding toward the axial center are formed at a plurality of locations,
    The locking portion at the end of the thin portion formed between the first groove portions and the locking portion at the end of the thin portion formed between the second groove portions are bilaterally symmetrical with respect to the central portion in the axial direction. Formed,
    When the pipe joint, connects the first pipe member or the second mounted on one of the pipe members of the pipe member, the other one of the first piping member or the second pipe member The pipe joint structure is characterized in that the engaging part of the pipe joint is configured to be able to expand and contract.
  8.   The pipe joint structure according to claim 7, wherein the first pipe member and the second pipe member are in contact with each other with tapered surfaces.
  9.   In the female side joint of the second piping member, an extending tube portion is formed integrally with the female side joint toward the first piping member side, and the extending tube portion is formed along the circumferential direction. The pipe joint structure according to claim 7 or 8, wherein a window part engageable with the engaging part of the pipe joint is disposed.
JP2002348868A 2002-11-29 2002-11-29 Piping joint Expired - Fee Related JP4048936B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002348868A JP4048936B2 (en) 2002-11-29 2002-11-29 Piping joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002348868A JP4048936B2 (en) 2002-11-29 2002-11-29 Piping joint

Publications (2)

Publication Number Publication Date
JP2004183703A JP2004183703A (en) 2004-07-02
JP4048936B2 true JP4048936B2 (en) 2008-02-20

Family

ID=32751659

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
JP (1) JP4048936B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4120571B2 (en) 2003-11-25 2008-07-16 株式会社デンソー Piping joint device
JP4196879B2 (en) 2004-05-18 2008-12-17 株式会社デンソー Piping joint device
JP2006313010A (en) 2005-04-04 2006-11-16 Denso Corp Piping joint device
JP4929864B2 (en) 2006-06-15 2012-05-09 株式会社デンソー Piping joint device
JP4345843B2 (en) 2007-04-27 2009-10-14 株式会社デンソー Heat exchanger

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