JP2004125034A - Connector for pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector for a pipe preventing the failure in sealing by surely preventing the movement of a pressing ring. <P>SOLUTION: A socket 40 is mounted on one pipe end to be connected and a plug is mounted on the other pipe end. The socket 40 has a pair of notch grooves 53 on its peripheral face at both sides opposite to each other. Gate-shaped stoppers 60 are mounted on the notch grooves 53. The plug 20 is provided with a groove 25 for fitting the stopper 60, and a tapered wall 24 for guiding the stopper 60 to the groove 25. A seal ring 50 for air-tightly sealing an inner periphery of the socket 40 and an outer periphery of the plug 20, and the pressing ring 49 for regulating the movement of the seal ring 50 to an opening part side of the socket 40 are mounted on the inner periphery of the socket 40. Further a projecting part 21 engaged with the pressing ring 49 mounted on the inner periphery of the socket 40, is formed on a tip side with respect to the groove 25, of the plug 20 to configurate this connector 10 for the pipe. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a piping connector preferably used for a fluid piping in an engine cooling system or an intake system of an automobile, for example.
[0002]
[Prior art]
For example, when connecting a radiator hose or the like of an automobile, a pipe connector (one-touch connection) is achieved by simply inserting a plug attached to the end of one tube into a socket attached to the end of one tube. Pipe fittings) are widely used.
[0003]
As such a pipe connector, for example, Japanese Patent Application Laid-Open No. 10-9470 discloses a notch groove in which an outer peripheral groove is provided on the outer periphery of a female pipe (socket), and the outer peripheral groove penetrates the inner and outer diameters and faces at a required angle. And a stopper arm (stopper) is engaged with a valley peripheral portion of the non-notched groove portion, and each locking arm extending from the stopper arm is bridged and locked in each notched groove. It discloses that a part of the arm protrudes into the female pipe and fits into a groove on the outer periphery of the male pipe (plug).
[0004]
In such a connector for piping, a stopper that projects into the inner periphery of the socket through the notch groove of the socket is easy to engage with the groove on the outer periphery of the plug. Is formed.
[0005]
In addition, a seal ring is disposed between the inner periphery of the socket and the outer periphery of the plug in order to hermetically seal such that fluid flowing inside the pipe does not leak when the connector is connected. The seal ring is mounted in an annular groove formed by an annular step provided at the back of the socket and a press ring provided at an opening side at a predetermined distance from the step. . The holding ring is fixed to the inner periphery of the socket by welding or the like.
[0006]
[Patent Document 1]
JP-A-10-9470
[Problems to be solved by the invention]
However, in the above-described conventional piping connector, although the holding ring is fixed to the inner periphery of the socket by welding or the like, the holding ring is peeled off from the inner periphery of the socket during use due to the influence of the fluid pressure flowing inside the piping. I couldn't say that there was no possibility.
[0008]
If the press ring is peeled off from the inner periphery of the socket, the press ring moves due to the influence of the fluid pressure or the like received by the seal ring, and there is a possibility that the seal ring is displaced and the sealing performance is reduced.
[0009]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a piping connector in which the movement of a holding ring is reliably prevented so that poor sealing does not occur.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a first aspect of the present invention comprises a substantially tubular socket attached to one pipe end to be connected, and a substantially tubular plug attached to the other pipe end. A pair of notch grooves are provided on the peripheral surfaces on both sides facing each other, and a stopper having a gate shape is mounted on the notch groove.The plug has a groove in which the stopper fits, and a stopper. A diameter-enlarging taper portion formed on the distal end side of the groove so as to guide the groove, and a seal ring hermetically sealing the outer periphery of the plug with an inner periphery of the socket; A presser ring for controlling movement of the ring to the socket opening side is mounted, and a convex portion with which the presser ring arranged on the inner periphery of the socket engages on the distal end side of the plug from the groove. Is formed There is provided a pipe connector according to claim.
[0011]
According to the invention, when the plug is inserted into the socket, the stopper mounted on the socket slides along the tapered portion of the plug and then fits into the groove of the plug. As a result, the plug is prevented from falling out of the socket, and the tubes can be connected with one touch. The gap between the socket and the plug is hermetically sealed by a seal ring, and the movement of the seal ring is regulated by the presser ring. Furthermore, even when the presser ring is peeled off from the inner periphery of the socket due to, for example, the fluid pressure flowing through the inside of the pipe, the convex portion provided on the plug is engaged with the presser ring. Can be regulated, thereby preventing the occurrence of poor sealing of the seal ring.
[0012]
A second aspect of the present invention is the pipe connector according to the first aspect, wherein the convex portion is provided on a diameter-increased tapered portion of the plug and at a position where the stopper does not interfere with sliding. Is provided.
[0013]
According to the above invention, by providing the convex portion on the enlarged diameter tapered portion of the plug, it becomes easy to remove the mold at the time of molding the plug, reduce the cost of the injection molding die, and improve the manufacturing workability. be able to. In addition, since the seal ring mounted on the inner periphery of the socket can be disposed at a position close to the tapered portion of the plug, the axial length of the connector can be reduced as much as possible.
[0014]
A third aspect of the present invention provides the piping connector according to the first or second aspect, wherein the convex portion is provided at a plurality of locations.
[0015]
According to the above invention, since the holding ring can be locked by the convex portions provided at a plurality of locations, the movement of the holding ring can be more reliably prevented. In addition, by reducing the width and the like of the convex portions, the amount of resin required for molding can be reduced, and the occurrence of sink marks and the like during molding can be prevented.
[0016]
A fourth aspect of the present invention provides the piping connector according to any one of the first to third aspects, wherein the pressing ring is temporarily held on an inner periphery of the socket.
[0017]
According to the above invention, since the holding ring only needs to be temporarily held on the inner periphery of the socket, operations such as welding can be omitted, and productivity can be increased. Even if the presser ring is not completely fixed to the socket, after the plug is inserted and connected, the convex portion formed on the plug engages and restricts the movement of the presser ring. There is no problem.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 4 show an embodiment of the piping connector of the present invention. 1A and 1B are perspective views of the connector, in which FIG. 1A is an exploded perspective view, FIG. 1B is a perspective view showing a connected state, FIG. 2 is a connected state of the connector, FIG. 3B shows a side sectional view of the connector, FIG. 3A shows a socket of the connector, FIG. 4A is a sectional view showing a state in which a stopper is being mounted, FIG. 4B is a sectional view showing a state in which a stopper is mounted, and FIG. 3A and 3B show a plug of the connector, wherein FIG. 3A is a side view, FIG. 3B is an end view as viewed from the distal end side, and FIG. 3C is a perspective view.
[0019]
As shown in FIG. 1, the connector 10 includes a substantially tubular plug 20 attached to one end of a tube to be connected, a substantially tubular socket 40 attached to an end of the other tube, and a socket 40. And a stopper 60 formed of a bent wire to be mounted. In addition, the plug 20 and the socket 40 constitute an internal flow path that connects a pair of pipes to be connected in a state where they are connected to each other.
[0020]
Referring also to FIG. 2, the socket 40 has, at one end, a mounting port 41 to which the other pipe (not shown) to be connected, for example, a hose, a tube, or the like is connected, and receives the plug 20 at the other end. It has an insertion port 43. The attachment port 41 is formed so as to be bent and extended at an angle of about 60 degrees with respect to the socket body. An annular rib 42 is formed at the distal end of the mounting opening 41 to enhance the effect of preventing the pipe to be connected from coming off.
[0021]
The main body of the socket 40 has a cylindrical shape of a size and shape for receiving the plug 20. In particular, as shown in FIG. 2B, the main body of the socket 40 has a shape that gradually increases in diameter, and a first enlarged portion 44 having an inner diameter slightly enlarged from a connection portion of the mounting port 41. A second enlarged diameter portion 45 slightly enlarged from the first enlarged diameter portion 44 and a third enlarged diameter portion 46 further enlarged from the second enlarged diameter portion 45 are provided.
[0022]
On the inner circumference of the socket 40, a step 47 is formed between the first enlarged diameter portion 44 and the second enlarged diameter portion 45, and between the second enlarged diameter portion 45 and the third enlarged diameter portion 46. Is formed with a stepped portion 48. A press ring 49 having an L-shaped cross section and having an annular shape is attached to the step portion 48.
[0023]
Further, a seal ring 50 is provided in an annular groove formed between the step portion 47 and the press ring 49. That is, the seal ring 50 is held at a predetermined position by the step portion 47 and the press ring 49. The holding ring 49 is joined to the inner periphery of the socket 40 by welding, bonding, or the like.
[0024]
A guide groove 51 into which a positioning protrusion of the plug 20 described later is inserted is formed in the third enlarged diameter portion 46 of the socket 40, and the outer periphery of the guide groove 51 forms a partially bulged wall portion 52. ing.
[0025]
Referring also to FIG. 3, a cutout groove 53 into which the stopper 60 is inserted is formed in the third enlarged diameter portion 46. The notch groove 53 is formed in a slit shape so as to penetrate the inside and outside of the socket 40 along a circumferentially opposed portion of the third enlarged diameter portion 46.
[0026]
A pair of ribs 54 projecting from the opposing edges of the notch groove 53 are formed in the upper half of the notch groove 53 on the outer periphery of the third enlarged diameter portion 46, and these ribs 54 are securely sandwiched by the stopper 60. I keep it. Further, a concave portion 55 having a V-shaped cross section along the circumferential direction is formed in a part of the cutout groove 53 on the outer periphery of the third enlarged diameter portion 46. Further, at the lower end of the notch groove 53 on the outer periphery of the third enlarged-diameter portion 46, a housing recess 56 surrounded by a U-shaped wall for housing the end of the stopper 60 is formed.
[0027]
The stopper 60 is composed of a wire or the like bent as a whole as a whole. At the center of the stopper 60, an outward bent portion 61 that fits the outer periphery of the bulging wall portion 52 is formed. At both ends of the stopper 60, a front bent portion 62 is formed which is bent at substantially 90 ° toward the insertion port 43 in the axial direction of the socket 40. Further, an inward bent portion 63 bent inward in an arc shape is formed in a portion slightly closer to the base from the forward bent portion 62.
[0028]
As shown in FIGS. 3A and 3B, in order to mount the stopper 60 on the socket 40, first, while expanding both ends of the stopper 60, insert the stopper 60 into the notch groove 53 of the socket 40 from above. Put on. Then, the front bent portion 62 of the stopper 60 is fitted and temporarily held in the V-shaped concave portion 55 on the outer periphery of the socket 40. When the stopper 60 is further pushed downward in this state, the both ends of the stopper 60 slide while expanding again, and the front bent portion 62 fits into the accommodation recess 56.
[0029]
At this time, both ends of the stopper 60 are inserted into the notch grooves 53 of the socket 40, and a part thereof is in a state of protruding inward from the inner periphery of the notch groove 53. In particular, the inner bent portion 63 is It protrudes greatly. At this time, each end of the stopper 60 traverses the circumference of the notch groove 53 like a chord and intersects the notch groove 53 at two upper and lower positions. It is formed at the intersection.
[0030]
On the other hand, the plug 20 has a shape extending from the distal end tapered portion 22 through the straight portion 23 to the enlarged diameter tapered portion 24, and an annular groove portion 25 and a positioning projection 26 are formed on the outer periphery of the top of the enlarged diameter tapered portion 24. It has a formed structure.
[0031]
The first enlarged diameter portion 44 of the socket 40 has an inner diameter into which the tip tapered portion 22 and the straight portion 23 of the plug 20 are inserted. Further, the seal ring 50 arranged on the second enlarged diameter portion 45 of the socket 40 has an inner diameter that is in close contact with the straight portion 23 of the plug 20. Further, the third enlarged diameter portion 46 of the socket 40 has an inside diameter capable of accommodating the enlarged diameter tapered portion 24, the annular groove portion 25, the positioning projection 26, and the like of the plug 20. The positioning projection 26 is inserted into the guide groove 51 of the socket 40, whereby the angle at which the plug 20 and the socket 40 are assembled is regulated.
[0032]
The greatest feature of the present invention resides in that a convex portion 21 that partially projects is provided in the diameter-increased tapered portion 24 of the plug 20. In this case, the convex portion 21 is formed at a position that does not interfere with the stopper 60 when the plug 20 is inserted into the socket 40, avoiding the surface on which the stopper 60 of the enlarged diameter tapered portion 24 slides. That is, in this embodiment, the protrusions 21 are formed at two positions, that is, the direction in which the positioning projections 26 are formed and the direction opposed thereto. When the plug 20 is inserted into the socket 40, the projecting end surface of the projection 21 comes into contact with the pressing ring 49.
[0033]
Next, the operation of the connector 10 will be described.
When the positioning projections 26 of the plug 20 are positioned so as to be inserted into the guide grooves 51 of the socket 40, and the plug 20 is inserted into the insertion opening 43 of the socket 40 from the front end thereof, the front end tapered portion 22 of the plug 20 becomes It is inserted into the inner periphery of the first enlarged diameter portion 44 of the socket 40. Then, the straight portion 23 of the plug 20 is inserted into a seal ring 50 arranged on the inner periphery of the second enlarged diameter portion 45 of the socket 40, and the seal ring 50 hermetically seals the outer periphery of the plug 20 and the inner periphery of the socket 40. Seal.
[0034]
When the plug 20 is further pushed in, both ends of the stopper 60 come into contact with the enlarged diameter tapered portion 24 of the plug 20, and ascend the tapered wall while being enlarged along the enlarged diameter tapered portion 24. The convex portion 21 is formed on the enlarged diameter tapered portion 24. The convex portion 21 is located at a position that does not interfere with the stopper 60, that is, the direction in which the positioning projection 26 is formed and the direction opposite thereto. Since the stopper 60 is formed at the two positions, the stopper 60 does not get caught on the protrusion 21.
[0035]
When both ends of the stopper 60 have climbed up the enlarged diameter tapered portion 24, they are fitted into the annular groove 25 of the plug 20 as shown in FIG. As a result, the plug 20 is prevented from falling out of the socket 40, and the pipe is connected.
[0036]
At this time, the convex portion 21 of the plug 20 comes into contact with the press ring 49 of the socket 40 from the side opposite to the seal ring 50. The movement of the seal ring 50 is restricted between the press ring 49 and the step 47 formed between the first enlarged diameter portion 44 and the second enlarged diameter portion 45. Therefore, even if a high-pressure fluid flows inside the connected pipe, the seal ring 50 can be firmly held. The movement of the seal ring 50 may be restricted by being tightly sandwiched between the press ring 49 and the step portion 47, or may have a slight clearance.
[0037]
Even if the press ring 49 is peeled off from the inner periphery of the socket 40, the press ring 49 is prevented from moving because the opposite side of the press ring 49 from the seal ring 50 is in contact with the projection 21 of the plug 20. You. As a result, the displacement of the seal ring 50 can be reliably prevented for a long period of time, and the sealing performance can be maintained.
[0038]
In addition, by providing the convex portion 21 of the plug 20 in the enlarged diameter tapered portion 24, the length of the insertion portion of the plug 20 can be shortened as much as possible, and compactness can be achieved. Further, since the mold can be pulled out in the axial direction, the design of the mold for injection molding can be facilitated, and the cost of the mold can be reduced. Furthermore, since the protrusions 21 are provided at two locations facing the circumferential direction of the plug 20, the holding ring 49 can be locked without bias.
[0039]
FIG. 5 shows another embodiment of the connector of the present invention.
In this connector, the socket 40 and the stopper 60 are the same as those in the above-described embodiment, except that the shape of the plug 20 in the above-described embodiment is partially different.
[0040]
That is, in this connector, the protrusions 27 of the plug 20 are formed as a plurality of ribs extending in the axial direction, and are formed in parallel with a predetermined gap. These rib-shaped protrusions 27 are formed at two positions, that is, the direction in which the positioning projections 26 of the plug 20 are formed and the direction opposite thereto. According to this embodiment, since the thickness of the convex portion 27 can be reduced, it is possible to obtain an advantage that the amount of resin can be reduced and the occurrence of sink during molding can be prevented.
[0041]
In the present invention, the pressing ring 49 does not necessarily need to be fixed to the inner periphery of the socket 40, but may be temporarily fixed. Even in such a case, if the plug 20 is inserted into the socket 40 and connected by the connector 10, the convex portion 27 of the plug 20 abuts on the press ring 49, thereby preventing the press ring 49 from moving. The ring 50 is not displaced, and the sealing performance can be maintained.
[0042]
【The invention's effect】
As described above, according to the present invention, even when the presser ring is peeled off from the inner periphery of the socket due to the influence of fluid pressure or the like flowing inside the pipe connected by the connector, the convex portion provided on the plug is Since it is engaged with the ring, it is possible to restrict the movement of the presser ring, thereby preventing the displacement of the seal ring and maintaining the sealability reliably for a long period of time.
[Brief description of the drawings]
FIG. 1 is a perspective view of a piping connector according to an embodiment of the present invention, where (a) is an exploded perspective view and (b) is a perspective view showing a connected state.
FIGS. 2A and 2B show a connection state of the connector, wherein FIG. 2A is a side view and FIG.
3A and 3B show a socket of the connector, wherein FIG. 3A is a cross-sectional view showing a state in which a stopper is being mounted, and FIG. 3B is a cross-sectional view showing a state in which the stopper is mounted.
4A and 4B show a plug of the connector, wherein FIG. 4A is a side view, FIG. 4B is an end view seen from the front end side, and FIG. 4C is a perspective view.
5A and 5B show a plug of a piping connector according to another embodiment of the present invention, in which FIG. 5A is a side view, FIG. 5B is an end view as viewed from the tip side, and FIG. 5C is a perspective view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Connector 20 Plug 21, 27 Convex part 24 Increasing diameter taper part 25 Annular groove part 40 Socket 47 Step part 49 Pressing ring 50 Seal ring 53 Notch groove 60 Stopper

Claims (4)

It comprises a substantially tubular socket attached to one end of the pipe to be connected, and a substantially tubular plug attached to the other end of the pipe, and the socket has a pair of notched grooves on the peripheral surfaces on opposite sides. A notch-shaped stopper is provided in the notched groove, and a groove in which the stopper is fitted and a stopper formed on the distal end side of the groove so as to guide the stopper into the groove. A seal ring for hermetically sealing the outer periphery of the plug with an inner periphery of the socket, and a presser for restricting the movement of the seal ring toward the socket opening. A piping connector, wherein a ring is attached to the plug, and a convex portion with which the presser ring arranged on the inner periphery of the socket engages is formed on a distal end side of the plug with respect to the groove. The piping connector according to claim 1, wherein the convex portion is provided on a diameter-increased tapered portion of the plug and at a position where the stopper does not interfere with sliding. The piping connector according to claim 1, wherein the protrusion is provided at a plurality of locations. The piping connector according to any one of claims 1 to 3, wherein the holding ring is temporarily held on an inner periphery of the socket.

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