JP2006001381A - Fixing member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing member low in cost and high in versatility capable of firmly fixing a resin fuel tank on a car body. <P>SOLUTION: The fixing member 22 burying a metallic nut 28 in a resin member 27 integrally molded in two layers of penetration resistant resin 25 and welded/adhesive resin 26 is welded 29 on the resin fuel tank 12 at a point of the welding/adhesive resin 26. It is possible not only to firmly fix the fuel tank 12 by sufficiently securing depositing strength as the welded/adhesive resin 26 is welded but also to prevent penetration of evaporated fuel from the circumference of the nut 28 by the penetration resistant resin 25 laminated on the welding/adhesive resin 26. It is possible to improve generality and contribute to cost reduction as the fixing member 22 can be fixed on an optional portion of various fuel tanks 12. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fixing member that is attached to a resin member by welding or adhesion and can be used when the member is fixed to another member or when the other member is fixed to the member.

  In order to attach the fuel tank of an automobile to the vehicle body, both ends of a band spanned in a groove formed on the surface of the fuel tank are bolted to the vehicle body, and the surface of the fuel tank is pressed against the vehicle body via cushion rubber and fixed. Is known from Patent Document 1 below.

In addition, in order to fix the lid that closes the opening formed in the upper tank shell of the fuel tank, an annular set plate in which bolts are pre-installed is welded around the opening of the upper tank shell, and the lid is attached to the set plate. Patent Document 2 below discloses that a nut that is overlapped and screwed to the bolt is fastened.
JP-A-5-294150 JP 2000-127771 A

  By the way, since what was described in the said patent document 1 hold | suppressed and fixed the fuel tank with the band, there existed a possibility that the position shift of a fuel tank might become incomplete and a position shift might generate | occur | produce by external force or a vibration. .

  Further, in the above-mentioned Patent Document 2, the structure of the portion for fixing the set plate in which the bolt is implanted to the fuel tank is complicated and the processing cost increases, and the set plate can be diverted to another model. There was a problem that versatility was poor due to difficulty.

  The present invention has been made in view of the above-described circumstances, and can be used when fixing a resin member to another member or fixing another member to a resin member, and is low-cost and highly versatile. An object is to provide a fixing member.

  In order to achieve the above object, according to the invention described in claim 1, a metal screw member is embedded in a resin member integrally formed in a multilayer with at least a permeation-resistant resin and a welding / adhesive resin. A featured fixing member is proposed.

  According to the second aspect of the present invention, in addition to the structure of the first aspect, the welding / adhesive resin is welded or bonded to a resin fuel tank, and the permeation-resistant resin is interposed via a screw member. A fixing member is proposed which is fixed to the support member.

  The mounting bracket 23 of the embodiment corresponds to the support member of the present invention, and the nut 28 of the embodiment corresponds to the screw member of the present invention.

  According to the configuration of the first aspect, since the metal screw member is embedded in the resin member integrally formed in a multilayer with at least the permeation resistant resin and the welding / adhesive resin, the welding / adhesive resin is used as the resin article. By fixing by welding or bonding, the resin article can be fixed to another member via a screw member, or the other member can be fixed to the resin article. In addition, since the portion fixed to the resin article is made of a welded / adhesive resin, not only can the welded strength and adhesive strength be sufficiently secured to enable strong fixing, but also the welded / adhesive resin. Permeation of volatile substances from the periphery of the screw member can be prevented by the permeation-resistant resin laminated on the screw member. Further, since the fixing member can be fixed to any part of various articles, it is highly versatile and can contribute to cost reduction.

  According to the configuration of the second aspect, since the welding / adhesive resin is welded or bonded to the resin fuel tank and the permeation resistant resin is fixed to the support member via the screw member, the fuel tank is firmly attached to the support member. Moreover, the diffusion of the evaporated fuel from the fuel tank can be suppressed by the permeation resistant resin.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples of the present invention shown in the accompanying drawings.

  1 to 3 show a first embodiment of the present invention. FIG. 1 is a perspective view of a vehicle fuel tank, FIG. 2 is a sectional view taken along line 2-2 of FIG. 1, and FIG. It is a 3 line expanded sectional view.

  As shown in FIGS. 1 and 2, a tank body 11 of a vehicle fuel tank T has an upper half 12 and a lower half 13 and is formed of a synthetic resin. A fuel pump unit 17 is supported via a stay 16 on the lower surface of a mounting flange 15 that detachably covers the opening 14 formed in the upper half 12 of the tank body 11, and a feed pipe 18 extending from the fuel pump unit 17 is mounted. A return pipe 19 from the engine extends through the mounting flange 15 and into the fuel tank T while passing through the flange 15 and connected to the engine (not shown). A liquid level sensor 21 having a float 20 is provided on the lower surface of the mounting flange 15.

  As is clear from FIG. 3, the fuel tank T has a plurality (six in the embodiment) of fixing members 22 fixed to the upper half 12 of the tank body 11 and the same number of mounting brackets 23. It is fixed to the lower surface of the floor panel 24 via.

  The fixing member 22 is a substantially cylindrical member, and consists of a permeation-resistant resin 25 that is less permeable to volatile substances such as fuel vapor, and a welding / adhesive resin 26 that is excellent in weldability or adhesion. Is provided with a resin member 27 integrally formed therewith. At this time, a nut 28 with a flange 28a for retaining the protrusion protruding on the outer periphery is insert-molded inside the permeation resistant resin 25, and the upper surface of the nut 28 is flush with the upper surface of the permeation resistant resin 25. . As the permeation resistant resin 25, for example, polyamide can be used, and as the welding / adhesive resin 26, the same material as the surface of the tank body 11, for example, polyethylene can be used.

  Therefore, the welding / adhesive resin 26 of the fixing member 22 is fixed in advance to the upper half 12 of the tank body 11 by welding (or bonding) 29, and the nut 28 inserted into the fixing member 22 is attached to the mounting bracket with the bolt 30. By fastening to 23, the fuel tank T can be supported on the lower surface of the floor panel 24. Since the welding / adhesive resin 26 is firmly welded (or adhered) 29 to the upper half 12 of the tank body 11, the support rigidity of the fuel tank T can be increased. Further, the permeation-resistant resin 25 prevents the fuel vapor from permeating, so that the fuel vapor that has permeated through the upper half 12 of the tank body 11 and the welding / adhesive resin 26 is prevented from being diffused from the periphery of the nut 28 to the atmosphere. be able to.

  As described above, since the fixing members 22... Manufactured in advance as separate members are welded (or bonded) 29 to the tank main body 11, the tank is compared with the case where the fixing portion into which the nut is inserted is formed integrally with the tank main body 11. Manufacturing of the main body 11 is facilitated and the cost can be reduced. Further, since the common fixing member 22 can be shared by the fuel tanks T having different specifications, the cost can be further reduced.

  Next, a second embodiment of the present invention will be described with reference to FIG.

  In the first embodiment described above, the upper surface of the nut 28 is exposed on the upper surface of the permeation-resistant resin 25, but in this second embodiment, the nut 28 is completely embedded in the permeation-resistant resin 25. By doing so, it is possible to prevent the nut 28 from falling off from the permeation-resistant resin 25 without forming the flange 28 a on the nut 28.

  Other configurations and effects of the second embodiment are the same as those of the first embodiment described above.

  Next, a third embodiment of the present invention will be described with reference to FIG.

  The third embodiment is a modification of the first embodiment, and the fixing member 22 formed in an arch shape as a whole is composed of a permeation-resistant resin 25 and is welded or bonded to the tank body 11. The portion is formed of a welding / adhesive resin 26. A metal nut 28 is embedded in a portion corresponding to the apex of the permeation resistant resin 25. Thus, the fixing strength can be increased by welding or bonding the fixing member 22 to the tank body 11 at two locations.

  Other configurations and effects of the third embodiment are the same as those of the first embodiment described above.

  Although the embodiments of the present invention have been described above, various design changes can be made without departing from the scope of the present invention.

  For example, in the embodiment, the fixing member 22 is fixed to the upper half 12 of the tank body 11, but it may be fixed to the lower half 13, or the upper half 12 and the lower half 13 are coupled. It may be fixed to the flange.

  In the embodiment, the fixing member 22 is used to attach the fuel tank T to another member. However, the fixing member 22 can be used to attach the other member to the fuel tank T or for any other purpose.

  In the embodiment, the nut 28 is inserted into the fixing member 22, but a bolt may be inserted.

  In the embodiment, the permeation-resistant resin 25 and the welding / adhesive resin 26 are integrally formed in two layers. However, as long as at least two layers of the permeation-resistant resin 25 and the welding / adhesive resin 26 are included, It may be formed integrally with three or more layers.

1 is a perspective view of a vehicle fuel tank according to a first embodiment. 2-2 sectional view of FIG. 3-3 enlarged sectional view of FIG. The figure corresponding to the said FIG. 3 based on 2nd Example. The figure corresponding to the said FIG. 3 based on 3rd Example.

Explanation of symbols

23 Mounting bracket (supporting member)
25 Permeation Resistant Resin 26 Welding / Adhesive Resin 27 Resin Member 28 Nut (Screw Member)
29 Welding or bonding T Fuel tank

Claims (2)

  A fixing member characterized in that a metal screw member (28) is embedded in a resin member (27) integrally formed in multiple layers with at least a permeation-resistant resin (25) and a welding / adhesive resin (26). The welding / adhesive resin (26) is welded or bonded (29) to a resin fuel tank (T), and the permeation-resistant resin (25) is attached to a support member (23) via a screw member (28). The fixing member according to claim 1, wherein the fixing member is fixed.

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