JP3638866B2 - Tank connection parts mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tank connecting part mounting structure such as a filler, drain, and pipe of a resin fuel tank for a vehicle.
[0002]
[Prior art]
Unlike a passenger car, a resin fuel tank for trucks is in a state where the tank is exposed to the outside, and a filler (fuel filler port) is directly attached to the tank.
In the case of an iron tank, an iron filler is joined by brazing, soldering, welding or the like, and has sufficient strength to withstand the use environment.
In the case of a resin tank, since it is impossible to join the iron filler to the resin tank as it is, a structure as shown in FIGS.
[0003]
For example, when the iron filler 1 formed as shown in FIG. 7 is attached using screws 2,..., 2 as shown in FIG. 8, it is concentric with the opening 3a of the body 3 of the resin tank in advance. In particular, a reinforcing material or nut made of an iron sheet 4 is insert-molded or post-welded at the time of tank molding, and the iron filler 1 that has been caulked at the lower part and spread is provided with a packing 5 between the opening 3a and a screw. 2, 2, 2 are screwed, and the iron filler 1 is attached to the body 3.
Further, as shown in FIG. 9, the resin component 6 is concentrically fixed to the opening 3 a of the body 3 by welding or an insert, and an O-ring 7 is interposed at the upper end of the resin component 6 to lower the iron filler 1. The iron filler 1 is added to the tip of the resin component 6 and the iron filler 1 is attached to the body 3.
[0004]
〔problem〕
In such a conventional filler structure, the resin tank is more expensive than the iron tank. In the case of all resin fillers, both parts and man-hours can be made at the same cost as an iron tank, but the resin is scraped when the cap is opened and closed, and the seal surface is dented and scraped when the oil gun is inserted. This is not preferable because a malfunction due to poor sealing is assumed.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above-mentioned problems in the prior art, and the problem to solve this problem is that the number of parts can be reduced with respect to attachment of metal connection parts such as fillers provided in a resin fuel tank. It is an object of the present invention to provide a tank connecting part mounting structure capable of reducing costs by reducing man-hours.
[0006]
[Means for Solving the Problems]
The tank connection part mounting structure according to claim 1 of the present invention is a tank connection part mounting structure in which a metal connection part is attached to a resin tank, and a metal connection part having a flange formed at an end on the tank connection side, A resin holding member that is externally fitted to a metal connecting part and welds the flange to the resin tank; and a seal member that is interposed between the resin holding member and the metal connecting part to prevent leakage. The seal member is externally fitted to the metal connecting part, the resin holding member is externally fitted to the seal member and the metal connecting part, and an opening formed in the resin tank, The end face on the tank connection side of the resin restraining member is welded to the outer peripheral part of a hole such as a drain hole or a pipe connection part.
[0007]
The tank connecting part mounting structure according to claim 2 is characterized in that an iron connecting part is used for the metal connecting part and a member of the same material as the resin tank is used for the resin holding member. .
The tank connecting part mounting structure according to claim 3 is characterized in that the iron connecting part is made of an iron filler.
The tank connection part mounting structure according to claim 4 is characterized in that the iron connection part is an iron drain.
The tank connection part mounting structure according to claim 5 is characterized in that the iron connection part is an iron pipe.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the following embodiments of the present invention, a case where an iron filler is attached to a resin tank will be described. However, the same parts as those in the prior art are denoted by the same reference numerals and description thereof is omitted.
Further, this embodiment is specifically described for better understanding of the gist of the invention, and does not limit the content of the invention unless otherwise specified.
[0009]
〔Constitution〕
The truck-made resin fuel tank in the embodiment is made of a resin made of an iron filler 10 formed in the shape shown in the side sectional view of FIG. 1 and the lower plan view of FIG. 2 and a flange 11 formed at one end of the iron filler 10. A resin holding member 20 sandwiched between the tank body 3 side and an O-ring 30 fitted into an O-ring groove 21 formed on the inner edge of the resin holding member 20 to prevent leakage.
The truck-made resin fuel tank is formed of a thermoplastic resin such as ABS (acrylonitrile / butadiene / styrene) resin or PP (polypropylene). When the material used for the resin tank is a thermoplastic resin such as PP, the resin restraining member 20 is formed by using PP of a similar material, thereby facilitating welding to the body 3 side.
[0010]
The iron filler 10 is formed such that one end of the cylindrical portion 10a is bent outward to form a flange 11, and the other end is bent so as to be wound inward to form an oil supply gun insertion port 12, and the periphery of the bent portion of the oil supply gun insertion port 12 is bent. There are provided notches 13 and 13 at two equally spaced positions, and the notches 13 and 13 are fitted with engaging portions of caps (not shown) and rotated by 90 degrees to prevent them from coming off. To do.
[0011]
The resin restraining member 20 is formed in a short cylinder 23 having an inner diameter in which a flange 22 is provided at one end and into which the cylindrical portion of the iron filler 10 is fitted, and the end surface on the flange forming side is a surface 24 that contacts the body 3 of the resin tank. A groove having a level difference in three stages is formed by defining the smallest and deepest groove having the depth and diameter in the axial direction from the surface 24 as an O-ring groove 21.
[0012]
〔Production method〕
As shown in FIG. 4, the resin tank is assembled to the body 3 by first fitting the O-ring 30 to the iron filler 10 and then fitting the resin restraining member 20 to form the three members together. (FIG. 4A), and then the iron filler 10, the O-ring 30, and the resin restraining member 20 assembled together are supported by being sandwiched and supported by the chuck 40 (40a, 40b). The periphery of the hole in which the body 3 is to be assembled and the end face on the flange forming side of the resin restraining member 20 are heated by contacting the hot plate 50 (50a, 50b) (FIG. 4B). , (C)) When each heating surface is melted, the heating plate 50 is removed, and the heating surfaces 50 are brought into contact with each other and pressed until the melted resin 25 protrudes on both sides of the peripheral surface of the contact portion. (FIGS. 4D and 4E).
[0013]
[Function and effect]
In the embodiment configured as described above, leakage from the gap between the iron filler 10 and the resin restraining member 20 can be easily and reliably performed by the O-ring 30 and the cost for assembly and leakage is low. In addition, it is possible to fix three parts at the same time in one part welding process, and it is possible to effectively reduce the part cost, the man-hour cost and the like.
As for the fuel leak test, a good result was obtained when an airtight test was performed by applying a pressure assuming an actual vehicle.
[0014]
[Another aspect]
Although this embodiment is specifically described in order to facilitate understanding of the gist of the invention, it does not limit the content of the invention. It may be changed.
In this sense, another embodiment that meets the gist of the invention is shown below.
Below, the case of the connection part for resin fuel tanks which can apply the assembly method similar to the said embodiment is demonstrated.
[0015]
(First alternative embodiment) Drain structure This drain structure is a case where the drain provided on the lower surface side of the resin fuel tank is assembled to the iron discharge port member.
As shown in FIG. 5, an iron drain port 60 having a hole formed concentrically with the drain hole 3b formed in the body 3 of the resin fuel tank and having a female screw in the hole, and this iron A resin holding member 61 fitted over the drain port 60, an O-ring 62 interposed between the iron drain port 60 and the resin holding member 61, and a plug having a male screw screwed into the female screw of the iron drain port 60. 63, and a packing 64 interposed between the iron drain port 60 and the plug 63.
As in the embodiment, the peripheral portion of the drain hole 3b of the body 3 and the tank contact portion of the resin restraining member 61 in which the O-ring 62 is interposed between the iron drain port 60 are heated by a hot plate and melted. It joins by contacting and pressing a part.
Thereby, the iron drain port 60 can be attached to the lower surface side of the resin fuel tank, and the drain port can be easily sealed by screwing the plug 63 with the female screw of the iron drain port 60 via the packing 64. Can do.
[0016]
(Second alternative embodiment) Pipe mounting structure This pipe mounting structure is used when assembling an iron pipe provided at an arbitrary position of a resin fuel tank.
As shown in FIG. 6, an iron pipe 70 provided with a flange so as to be concentrically set in a pipe connection portion 3c formed in the body 3 of the resin fuel tank, and fitted on the flange forming side. It consists of a resin restraining member 71 and an O-ring 72 interposed between the iron pipe 70 and the resin restraining member 71.
As in the embodiment, the peripheral portion of the pipe connection portion 3c of the body 3 and the tank contact portion of the resin restraining member 71 in which the O-ring 72 is interposed between the iron pipe 70 and the resin restraining member 71 are heated. It joins by heating with a board and contacting and pressing a fusion | melting part.
As a result, the iron pipe 70 can be attached to the body 3 of the resin fuel tank, and leakage between the iron pipe 70 and the resin restraining member 71 can be prevented via the O-ring 72. The steel pipe 70 can be easily attached to the tank.
[0017]
【The invention's effect】
As described above, in the tank connection component mounting structure according to claim 1 of the present invention, the seal member is externally fitted to the metal tank connection component having a flange formed at the end on the tank connection side, and this seal member is externally fitted. With the resin restraining member fitted on the metal connecting part and the sealing member, the metal connecting part and the resin restraining member being integrated, the end face of the resin restraining member on the tank connection side is connected to the resin tank. It can be welded to the outer periphery of holes such as openings, drain holes or pipe connection parts, and metal connection parts can be firmly attached by resin restraining members, and between resin restraining members and metal connection parts It can be sealed by the sealing member, and three parts can be fixed at the same time in one step of parts welding, so that parts cost and man-hour can be reduced.
[0018]
Further, in the tank connecting part mounting structure according to claim 2, a cap connecting and closing is achieved by using an iron connecting part for the metal connecting part and using a member of the same material as the resin tank for the resin holding member. It is possible to prevent dents and scraping when inserting a fuel gun, and welding of the restraining member is facilitated, durability can be increased, manufacturing can be facilitated, and cost reduction can be realized.
In the tank connecting part mounting structure according to the third aspect, the iron filler can be firmly attached to the resin tank so as to prevent leakage.
In the tank connecting part mounting structure according to the fourth aspect, the iron drain can be firmly attached to the resin tank so as to prevent leakage.
In the tank connecting part mounting structure according to the fifth aspect, the iron pipe can be firmly attached to the resin tank so as to prevent leakage.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a filler mounting structure in an embodiment of a tank protruding part mounting structure according to the present invention.
FIG. 2 is a lower plan view showing the filler mounting structure.
FIG. 3 is a side cross-sectional view (a view taken along arrow BB in FIG. 2) showing a part of the filler mounting structure.
4A and 4B are explanatory views showing a mounting process of the filler mounting structure, wherein FIG. 4A is an explanatory view showing a process of combining a filler, an O-ring, and a resin restraining member, and FIG. 4B is a tank and resin restraining member; Explanatory drawing which shows the process of heating a junction part, (C) is the elements on larger scale which show the time of joining surface heating in (B), (D) is explanatory drawing which shows a filler attachment completion state, (E) is (D FIG.
FIG. 5 is a longitudinal cross-sectional explanatory view showing a drain structure of a first alternative embodiment of a tank protruding part mounting structure according to the present invention.
FIG. 6 is a longitudinal sectional explanatory view showing a pipe mounting structure of a second alternative embodiment of the tank protruding part mounting structure according to the present invention.
FIG. 7 is a perspective view showing a single filler of a conventional tank protruding part mounting structure.
FIG. 8 is a longitudinal sectional view showing a first mounting structure of a conventional filler mounting structure.
FIG. 9 is a longitudinal sectional view showing a second mounting structure of a conventional filler mounting structure.
[Explanation of symbols]
3 Body 10 (of resin fuel tank) Filler 11 Flange 20, 61, 71 Resin holding member 21 O-ring groove 24 Tank contact surface 30, 72 O-ring 60 Drain port 63 Plug 64 Packing 70 Iron pipe

Claims (5)

In the tank connection part mounting structure that attaches metal connection parts to the resin tank,
A metal connection part forming a flange at an end of the tank connection side, and a resin pressing member to dissolve wearing the flange and fitted into the metal connecting piece to the resin tank, and the resin pressing member Ri Do and a seal member for sealing leaks in interposed between the metal connecting parts,
The seal member is externally fitted to the metal connecting part, the resin holding member is externally fitted to the seal member and the metal connecting part, and an opening formed in the resin tank, a drain hole or A tank connection part mounting structure , wherein an end face of the resin restraining member on the tank connection side is welded to an outer peripheral part of a hole such as a pipe connection part . 2. The tank connection part mounting structure according to claim 1, wherein an iron connection part is used for the metal connection part, and a member of the same material as the resin tank is used for the resin holding member. The tank connecting part mounting structure according to claim 2, wherein the iron connecting part is made of an iron filler. The tank connecting part mounting structure according to claim 2, wherein the iron connecting part is an iron drain. 3. The tank connecting part mounting structure according to claim 2, wherein the iron connecting part is an iron pipe.

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