JPH0643600Y2 - Resin inlet pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is designed such that an O-ring 7 is fitted on the inner circumference of the mouth of a resin-made inlet pipe body 8 and the inlet pipe body 8 is
The metal retainer 1 in which the head piece 2b is formed so as to cover the end surface 8a at a distance from the end surface 8a of the inlet pipe body 8 by protruding the head piece 2b, and is fitted below the O-ring 7. A resin seal pipe 4 is formed by injection molding from the outer circumference of the tip end portion of the inlay pipe body 8 to the lower surface of the head piece 2b of the metal retainer 1 to form the inlet pipe body 8 and the metal retainer 1 by the resin seal pipe 4. The present invention provides a resin-made inlet pipe connected through the.

(Prior Art) Inlet pipes to be joined to fuel tanks are often formed in a bent shape, and in addition, since they are mass-produced, they are often formed using a resin material. However, the refueling port for inserting the fuel refueling gun of the inlet pipe is conventionally reinforced by fitting a metal retainer. The structure is as illustrated in FIG. 3, and the outer periphery of the resin inlet pipe a is shown. A caulking groove b and a peripheral groove c into which the O-ring d is fitted are formed, and an inner peripheral piece f, an outer peripheral piece g, and both pieces f and g are folded back by pressing at the inner circumference and the outer circumference of the tip of the resin inlaid pipe a. Bending part e deep-drawn by molding
The metal retainer i consisting of is fitted, and the caulking piece h at the end of the outer peripheral piece g is caulked into the caulking peripheral groove b to form an O-ring d.
Is compressed.

However, the metal retainer i used for this is the inner peripheral piece f.
Is formed by squeezing, thread groove j is formed, and head e
Since the outer peripheral piece g must be formed by the order of forming by deep drawing as described above, the number of press forming steps increases,
Get expensive.

(Problems to be solved by the invention, purpose of the invention) The present invention aims to improve the above-mentioned various drawbacks due to the deep depression of the head of the metal retainer and to make it possible to use the metal retainer which can be easily press-formed. This is the problem to be solved and the object of the present invention.

(Means for Solving Problems) The present invention meets the above-mentioned object, and the O-ring 7 is fitted in the fitting groove of the O-ring machined on the inner periphery of the mouth of the resin inlet pipe body 8. At the same time, the metal retainer 1 formed with the head piece 2b which covers the end surface 8a of the inlet pipe body 8 at a distance is fitted below the O-ring 7 from the outer periphery of the tip end portion of the inlet pipe body 8. A resin seal pipe 4 is formed up to the lower surface of the head piece 2b of the metal retainer 1 by injection molding, and the inlet pipe body 8 and the metal retainer 1 are connected via the resin seal pipe 4. It is related to the inlet pipe.

(Embodiment) FIG. 1 of the accompanying drawings is a vertical sectional view of a first embodiment of the present invention, and FIG. 2 is a vertical sectional view of a second embodiment of the present invention.

In the first embodiment (FIG. 1), reference numeral 1 denotes a metal retainer, which is formed on a main body 2a into which a fuel supply gun is inserted by press-molding a metal pipe material and an end face 8a of a resin-made inlet pipe main body 8 described later. "He" which covers at intervals above
A collar-shaped head piece 2b having a shaped cross section is formed, and a screw groove 3 into which a screw lid (not shown) is screwed is formed below the head piece 2b.

The inlay pipe body 8 is formed by blow molding a resin material into a bent or straight pipe shape, and the metal retainer 1 has the outer circumference of the inner circumference 2c of the body 2a adjusted to the inner diameter of the inlet pipe body 8. And mold. After being formed in the inlet pipe body 8, a fitting groove for fitting the O-ring 7 is formed below the end surface 8a, and then the head piece 2b of the metal retainer 1 is projected above the end surface 8a and the inner circumference 2c is formed. Is placed below the O-ring 7, and the inner surface of the O-ring 7 is elastically contacted with and compressed by the outer surface of the inner circumference 2c of the metal retainer 1 by the fitting. (Fig. 1).

After this work is completed, the diameter is changed from the end of the inlet pipe body 8 to the end surface 8a, and from the end surface 8a to the lower surface of the head piece 2b of the metal retainer 1 as shown in the drawing, and the diameter is substantially integrated. The resin seal pipe 4 is molded by injection molding means. (Fig. 2).

The seal pipe 4 has its outer peripheral seal surface 5 inserted into an inlet pipe insertion port y of an automobile body x to generate a sealing action.

In the second embodiment (FIG. 2), the inner peripheral projection ring 4a at the lower end of the resin seal pipe 4 is inserted into the peripheral groove 8c provided on the outer periphery of the inlet pipe body 8 and injection molding is carried out. The connection between the pipe body 8 and the resin seal pipe 4 is strengthened, and the other parts are the same as those in the first embodiment shown in FIG.

(Operation and effect) As is clear from the above, the present invention is such that the metal retainer 1 fitted in the fuel supply port of the resin inlet pipe body 8 for reinforcement is spaced above the end surface 8a of the inlet pipe body 8. The head piece 2b to be covered by the press is formed by cantilevering, and the outer retainer piece, the inner peripheral piece and the bent piece corresponding to the head piece 2b of the present invention are press-formed to form a metal retainer for deep drawing. The resin inlet pipe can be constructed without lowering the strength, and the disadvantage of the metal retainer 1 being cantilevered is sufficiently compensated by the injection molding of the resin seal pipe 4, and the metal retainer 1 is press-molded. Increased strength of the resin-made inlet pipe 8, increased sealing performance between the sealing surface 5 of the resin seal pipe 4 and the inlay pipe insertion port y of the automobile x, and reduced manufacturing man-hours due to reduction in overall assembly and manufacturing man-hours. It has the effect of causing a bottom and the like and providing a resin-made inlet pipe which has never been seen.

[Brief description of drawings]

FIG. 1 of the accompanying drawings is a longitudinal sectional view of a first embodiment of the present invention,
FIG. 2 is a vertical sectional view of a second embodiment of the present invention. Third
The figure is a vertical sectional view of a conventional example. 1 → Metal retainer, 2a → Main body, 2b → Head piece 3 → Screw groove, 4 → Resin seal pipe 4a → Inner peripheral projection ring, 5 → Seal surface 7 → O ring, 8 → Resin insert pipe body 8a → End surface

Claims (1)

[Scope of utility model registration request] 1. An O-ring 7 is fitted into a fitting groove of an O-ring cut on the inner circumference of the mouth of a resin-made inlet pipe body 8 and is covered on the end surface 8a of the inlet pipe body 8 with a space. The metal retainer 1 formed with the head piece 2b is fitted below the O-ring 7, and the resin seal pipe 4 is inserted from the outer periphery of the tip end portion of the inlet pipe body 8 to the lower surface of the head piece 2b of the metal retainer 1. A resin-made inlet pipe, characterized by being formed by injection molding and connecting an inlet pipe body 8 and a metal retainer 1 via a resin seal pipe 4.