JPH09310791A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector to facilitate insertion and removal of a pipe body in and from a pipe body insertion part, to simplify structure and reduce the number of manufacturing processes, and to eliminate a need for time and labor for assembly through which parts are assembled together to form structure in which a pipe body is insertable. SOLUTION: A connector 1 comprises a pipe body connection part 11; a body 10 having a pipe body insertion part 13; and a retaining ring 20 slidably fitted externally of a slide part 15 on the outer periphery of the pipe body insertion part 13. A cut 17 to expand the inlet side is formed in the pipe insertion part 13, and a slip protection part 18 to lock the lock part 31 of the pipe body 30 inserted in the inner peripheral surface. Fixing means 21 and 16 for the retaining ring 20 are arranged on the inlet side of the pipe insertion part 13 of the slide part 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for connecting a pipe (for example, one of which may be a hose or a tube) for transferring a fluid such as gasoline or oil in an automobile. The present invention relates to the structure of (connected body).

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIGS. 10 and 11, a connector for connecting a tubular body 100 and a hose 110 such as a fuel pipe and a fuel hose in an automobile.
The reference numeral 120 includes a body 130 having a hose connecting portion 131 and a tubular body inserting portion 132, and a clip 140 for fixing the tubular body 100 inserted in the tubular body inserting portion 132 to the body 130. clip
140 is a pair of taper-like locking claws 144 in which flexible legs 143 are formed on one side of a substrate 142 having an insertion hole 141, and the legs 143 are narrowed at the front end side and widened at the rear end side. Is formed so as to be supported by the leg portion 143 inside the rear end.

As shown in FIG. 11, the clip 140 is inserted into the tubular body insertion portion 132 of the body 130 from the tip end thereof, and then the tape 140 is inserted.
The rear end of the pawl-shaped locking claw 144 is projected from the stopper hole 133 of the body 130 to form the body 130 with the clip 140 assembled. Then, the tubular body 100 is inserted into the body 130. Tube 100
Has a retaining projection 101 on the outer periphery of the end on the insertion side. As shown in FIG. 11, the tubular body 100 is inserted between the leg portions 143 of the clip 140 and the insertion hole 141 into the tubular body insertion portion 132, and the tubular body 100 is inserted.
The tip of the locking claw 144 engages with the rear end of the retaining projection 101 of the tube 100 to lock the tubular body 100. When removing the tubular body 100, by pushing both legs 143 in the direction of the axis L of the body 130, the locking claw 144 is disengaged from the stop hole 133. In this state, pull the tubular body 100 in the removing direction. , The pipe 100 with the clip 140 attached can be easily removed.

[0004]

In the conventional connector 120 described above, the two retaining claws 144 of the clip 140 fix the retaining projection 101 of the pipe 100 to the pipe insertion portion 132. The body 100 is easy to insert and does not interfere with normal use. However, since this connector 120 has a structure in which the pipe body 100 is inserted after the clip 140 is fitted in the pipe body insertion portion 132, the structure of the connector 120 is complicated and requires a lot of manufacturing man-hours. There is an inconvenience that it takes time to assemble the body so that the body can be inserted.

Therefore, an object of the present invention is to solve the above-mentioned inconveniences in the conventional connector, and the insertion and removal of the pipe body from the pipe body insertion portion are as easy as in the conventional case. It is an object of the present invention to provide a connector that has a simple structure, requires a small number of manufacturing steps, and has a structure in which parts can be assembled so that a tubular body can be inserted and does not require assembly work.

[0006]

In order to solve the above-mentioned problems, the invention of a connector according to claim 1 is to provide a pipe connecting portion,
A body having a tubular body insertion portion, and a retaining ring slidably fitted on a slide portion on the outer periphery of the tubular body insertion portion, the tubular body insertion portion having a notch for expanding the inlet side thereof, and The inner peripheral surface is provided with a retaining portion for retaining the retaining portion of the inserted tubular body, and a fixing means for the retaining ring is provided at the inlet side of the tubular body inserting portion of the slide portion. Is characterized by.

In order to solve the above-mentioned problems, the invention of a connector according to a second aspect is the connector according to the first aspect, wherein the tubular body connecting portion and the tubular body inserting portion are formed to communicate with each other, and the tubular body inserting portion has a retaining portion. At the inner side, a seal that closely contacts the outer peripheral surface of the inserted tube
It is characterized in that a structure is provided.

According to a third aspect of the invention for solving the above-mentioned problems, in the first or second aspect, the retaining ring is fitted in the slide portion so as to be slidable at a predetermined interval in the longitudinal direction of the tubular body insertion portion, The fixing means of the retaining ring is characterized by having a fitting structure of a concave portion and a convex portion.

According to a fourth aspect of the invention for solving the above-mentioned problems, in the first, second or third aspect, the locking portion of the tubular body and the retaining portion of the tubular body inserting portion are tubular bodies. It is characterized in that it is composed of both projections that can prevent the

[0010]

According to the first aspect of the present invention, the stop ring can slide the slide portion in the longitudinal direction. When the stop ring is located on the inner end side of the slide portion, the diameter of the tubular body insertion portion can be increased from the inlet side by cutting. In this state, the pipe body can be inserted into the pipe body insertion portion. The tube body has its locking portion positioned inside the tube body insertion portion. When the stop ring is slid to the front end side of the slide portion and fixed by the fixing means, the inner diameter of the tubular body insertion portion is held. In this state, the inserted tube is stopped.

In the second aspect, the tubular body inserted into the tubular body inserting portion is communicated with the tubular body connecting portion side. The tubular body of the tubular body insertion portion is closely attached by the seal structure so that the fluid flowing into the tubular body does not leak.

In claim 3, the stop ring is fixed to the slide portion by a fitting structure. In Claim 4, the pipe body is retained in the pipe body insertion portion.

[0013]

EXAMPLE An example of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 and 2, the connector 1 of this example includes a tubular body 10 and a retaining ring 20 for fixing the tubular body 30 to the body 10. The body 10 of this example is integrally formed of synthetic resin. The stopper ring 20 is externally inserted on the slide portion 15 of the body 10 to form the connector 1 of this example.
It is said.

The tubular body 30 is formed with an annular locking portion (usually called a bulge) 31 protruding outward on the outer peripheral surface on the insertion side. The locking portion 31 has a mountain shape in which the front and rear surfaces in the longitudinal direction are slanted or arcuate.

The body 10 is, as shown in FIGS. 1 and 2, a flexible tubular body such as a tube or a hose, and in this embodiment, is a tubular shape for connecting the hose 40 and has a small diameter. Tube connection part
A tube body insertion portion 13 is formed having 11 on one end side and the locking portion 31 side of the tube body 30 inserted and attached to the other end side. A plurality of retaining portions 11A for retaining the hose 40 in a retaining manner are provided on the outer peripheral surface of the tubular body connecting portion 11.

As shown in FIG. 2, the tubular hole of the tubular body insertion portion 13 has a large-diameter portion 13A into which the locking portion 31 of the tubular body 30 can be inserted, the portion having a predetermined length from the inlet side. The tip of the body 30 is a small-diameter portion 13B into which the body 30 can be inserted. The inner end of the small-diameter portion 13B communicates with the small-diameter through hole portion 12 of the tubular body connecting portion 11.

As shown in FIG. 2, the small-diameter portion 13B of the tube insertion portion 13 has a close contact structure composed of an O-ring 14A and an interposer 14B, and the peripheral surface of the inserted tube 30 is in close contact with the O-ring 14A. It is supposed to do. The close contact structure is O-ring 14
The structure is not limited to A, but may be another seal structure (not shown) such as a seal layer.

The large-diameter portion 13A of the tubular body insertion portion 13 is provided with a plurality of longitudinal notches 17 from the inlet side to the inner side. In this example, four circular notches 17 are provided on the circular peripheral surface of the inlet at equal intervals. The diameter can be expanded.

The outer peripheral surface of the large-diameter portion 13A of the tube insertion portion 13 serves as a slide portion 15, and a stop ring 20 formed of a small-width cylindrical body is externally fitted so as to be slidable in the longitudinal direction. A front ring stopper 15A protruding outward in a flange shape is provided on the inlet side of the slide portion 15, and a large-diameter rear ring stopper 15B is provided on the outer circumference on the other end side of the slide portion 15. The stop ring 20 is slidable in the longitudinal direction of the body 10 between the front ring stop 15A and the rear ring stop 15B.

The stop ring 20 is made of a synthetic resin or a metal ring, or a ring of a rigid metal strip. As shown in FIG. 3, the retaining ring 20 has a groove portion 21 formed along the inner peripheral surface thereof. On the other hand, in the vicinity of the front ring stopper 15A of the slide portion 15, a fixing protrusion 16
(One in this example) is provided, and when the stopper ring 20 is slid toward the inlet side, the protrusion 16 is engaged with the groove portion 21 to fix the stopper ring 20 in position.

A large diameter portion 13A of the tube insertion portion 13 is provided with a retaining portion 18 in a circular arc shape for retaining the inserted tube body 30 in the circumferential direction of the divided inner peripheral surface of the central portion. . Stopper 18
Has a mountain-shaped or semi-circular cross-section, and has a function of abutting the retaining portion 31 of the tubular body 30 in which the retaining portion 18 is raised and retaining.

The length of the notch 17 in the large-diameter portion 13A of the tube insertion portion 13 is set so that the stop ring 20 is located on the inner end side (the rear ring stop 15B side) of the slide section 15 and the tube 30
When the is inserted into the tubular body insertion portion 13, the locking portion 31 of the tubular body 30 and the retaining portion 18 contact, the locking portion 31 of the tubular body 30 can pass through the retaining portion 18, a large diameter portion. It is provided so that the diameter of the divided inlet side of 13A (that is, the slide portion 15) can be increased.

Next, an example of use of the connector 1 of this example will be described. As shown in FIG. 7, after the stop ring 20 of the connector 1 is positioned on the rear ring stop 15B side of the slide portion 15, the insertion side of the pipe body 30 is arranged at the inlet side of the pipe body insertion portion 13 of the connector 1. . Subsequently, as shown in FIG. 8, when the tubular body 30 is inserted into the tubular body inserting portion 13, the locking portion 31 of the tubular body 30 contacts the retaining portion 18 of the tubular body inserting portion 13. Then, when the tube body 30 is continuously inserted, the locking portion 31 of the tube body 30 presses the retaining portion 18 of the tube body inserting portion 13 to thereby divide the large diameter portion by the notch 17.
The diameter of 13A is expanded outward to allow the tube 30 to be inserted.

After the locking portion 31 of the tubular body 30 passes through the retaining portion 18 of the large diameter portion 13A, the divided large diameter portion 13A returns to its original shape, so that the retaining ring 20 is fixed to the front ring retaining portion 15A. Side (inlet side), slide groove 21 of stop ring 20
The stopper ring 20 is fixed to the front ring stopper 15A side by engaging with the protrusion 16 of the reference numeral 15. Since the expansion of the slide portion 15 is stopped by fixing the stop ring 20, the inserted tubular body 30 does not come off due to the contact between the locking portion 31 and the retaining portion 18.

Next, as shown in FIG. 7, a predetermined hose 40 is connected to the pipe body connecting portion 11. Note that the hose 40 may be connected to the tube body connecting portion 11 prior to the insertion of the tube body 30 in the state where only the body 10 is provided. In the inserted state of the tubular body 30, the outer periphery of the tubular body 30 on the insertion tip side is in close contact with the O-ring 14A of the tubular body inserting portion 13, so that the fluid inside the tubular body 30 does not leak and the tubular body connecting portion 11 Can be sent to the hose 40 via.

When the tubular body 30 inserted into the connector 1 is to be removed, the retaining ring 20 in the state shown in FIG. 9 is strongly pulled backward and returned to the rear ring stopper 15B, and then the tubular body 30 is pulled outward.
When the locking portion 31 comes into contact with the retaining portion 18 and is further pulled, the divided large diameter portion 13A expands in diameter and the retaining portion 31 raises the retaining portion 18, so that the tubular body 30 is easier than the connector 1. It can be removed. Locking portion 31 of tubular body 30 and retaining portion 18 of tubular body inserting portion 13
Since the cross section has a mountain shape or a semicircular shape, the passage after the contact between the two can be made smooth.

The fixing means of the stop ring 20 is not limited to the above-mentioned embodiment, but as shown in FIG. 5, the arc-shaped projection 16A provided on the slide portion 15 is engaged with the groove 21 of the stop ring 20. The stopper ring 20 may be fixed to the slide portion 15 by a fitting structure of a concave portion and a convex portion such as a groove portion provided on the slide portion and a protrusion portion provided on the stopper ring.

As shown in FIG. 6, the retaining portion 18 for retaining the tubular body 30 in the tubular body inserting portion 13 may be a retaining portion 18A composed of a point-like projection on the divided large diameter portion 13A, For example, a point-shaped projection locking part is provided on the tube 30 side, and an arcuate retaining part is provided on the divided large diameter part. An appropriate structure composed of protrusions can be formed.

[0029]

According to the first aspect of the present invention, the locking portion of the tubular body is inserted inwardly of the retaining portion of the tubular body inserting portion with the retaining ring positioned on the inner end side of the slide portion. Then, by fixing the stop ring to the inlet side of the tubular body inserting portion, the tubular body can be easily attached to the tubular body inserting portion. By fixing the stop ring to the inlet side of the tubular body insertion portion, the tubular body inserted in the tubular body insertion portion cannot be removed. When removing the tubular body inserted into the tubular body inserting portion, the retaining ring is unfixed, the retaining ring is slid to the inner end side of the slide portion, and then the tubular body can be easily removed by pulling the tubular body. Further, in the invention of claim 1, unlike the above-mentioned conventional connector, since a clip having a complicated structure to be mounted in the body is not required, the number of manufacturing steps for manufacturing is small, and the body for use is Assembling the parts of the and retaining ring is easy and does not require labor.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, the pipe body of the pipe body insertion portion is closely attached so as not to leak fluid, and the fluid is supplied to the pipe body connection portion side. It is made into a communication form that can be distributed.

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, the stop ring can be easily fixed.

According to the invention of claim 4, claim 1 described above
Alternatively, in addition to the effects of claim 2 or claim 3, the tubular body is retained in the tubular body insertion portion by the protrusion.

[Brief description of drawings]

FIG. 1 is a perspective view of a connector.

FIG. 2 is a cross-sectional view of a connector and a shape view of an insertion side of a tubular body.

FIG. 3 is a sectional view of a clip.

FIG. 4 is a plan view mainly showing a stopper shape of a slide portion.

FIG. 5 is a plan view showing another example of the stopper shape of the slide portion.

FIG. 6 is a view showing another example of the retaining portion of the tubular body inserting portion.

FIG. 7 is a shape diagram of a connector when inserting a tubular body into a tubular body inserting portion.

FIG. 8 is a shape view of a tubular body insertion portion when the tubular body is inserted.

FIG. 9 is a shape diagram of a tubular body insertion portion at the time of completion of insertion of the tubular body.

FIG. 10 is a partially cutaway perspective view showing a structure of a conventional connector.

11 is an enlarged view of a clip of the conventional connector shown in FIG.

[Explanation of symbols]

 1 Connector 10 Body 11 Tube connection section 13 Tube insertion section 13A Large diameter section 13B Small diameter section 14A O-ring 15 Slide section 16, 16A Projection section 17 Notch 18 Pullout prevention section 20 Stop ring 21 Groove section 30 Tube body 31 Lock section

Claims (4)

[Claims] 1. A tubular body connecting portion, a body having a tubular body inserting portion, and a retaining ring slidably fitted on a slide portion on the outer periphery of the tubular body inserting portion, wherein the tubular body inserting portion has its inlet port. A notch for expanding the side is provided, a retaining portion for locking the locking portion of the inserted tube is provided on the inner peripheral surface, and the inlet side of the tube inserting section of the slide section is A connector characterized in that a fixing means for a retaining ring is provided. 2. A seal structure in which a tubular body connecting portion and a tubular body inserting portion are formed in communication with each other, and a seal structure which is in intimate contact with the outer peripheral surface of the tubular body inserted is located inside the retaining portion of the tubular body inserting portion. The connector according to claim 1, wherein the connector is provided. 3. The stop ring is fitted into the slide part so as to be slidable at a predetermined interval in the longitudinal direction of the tubular body insertion part, and the fixing means of the stop ring is an inner peripheral surface of the stop ring and a recess provided on the peripheral surface of the slide part. The connector according to claim 1 or 2, wherein the connector has a fitting structure with convex portions. 4. The pipe according to claim 1, wherein the locking portion of the tubular body and the retaining portion of the tubular body inserting portion are both projections capable of retaining the tubular body. Connector described.