JPH08192646A - Fuel pipe mounting structure - Google Patents

Abstract

PURPOSE: To eliminate masking for a tightening nut at the time of a painting work by fixing the nut to the reverse side of a bracket mounting section, positioning the upper surface of the section at the reverse side of a tank flange, and then fastening the section to the tank flange with a screw. CONSTITUTION: When fuel tank side pipes 18 are connected to the tank flange 12 of a fuel tank 2, each end of a fuel supply pipe 6, a fuel return pipe 8 and an evaporation pipe 10, and a bracket mounting section 22 are inserted in a pipe insertion hole 14 from an upper level toward a lower level and, then, the section 22 is positioned on the lower side of the flange 12. Thereafter, a screw 38 is passed through a flange screw hole 36 and a mounting section screw hole 30 from a position above the flange 12, and screwed to the tapped hole 34 of a tightening nut 32. According to this construction, masking for protecting the tapped hole 34 of the nut 32 against paint such as a tipping coat and a shower coat can be eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel pipe mounting structure, and more particularly to a fuel pipe mounting structure that does not require masking of a fuel tank.

[0002]

2. Description of the Related Art In a vehicle, various pipes such as a fuel supply pipe for guiding fuel (fuel) from a fuel tank to an engine are installed. The various pipes are integrally held by the pipe holding bracket, and thus a so-called fuel tank side pipe is formed as a pipe assembly.

That is, as shown in FIGS. 8 to 10, a fuel pump 104 is installed in the fuel tank 102. To the fuel pump 104, one ends of a fuel supply pipe 106 and a fuel return pipe 108 are connected in parallel. Central portions of the fuel supply pipe 106 and the fuel return pipe 108 extend along the upper surface, which is the surface of the fuel tank 102. Further, in the fuel supply pipe 106 and the fuel return pipe 108,
Evaporative pipe 1 for guiding evaporated fuel to an engine (not shown)
10 are arranged in parallel. The other ends of the fuel supply pipe 106, the fuel return pipe 108, and the evaporation pipe 110 are arranged in parallel with each other into a long hole-shaped pipe insertion hole 114 formed in the tank flange 112 from above, which is the surface side of the fuel tank 102. It is inserted toward the lower surface side which is the back surface. The other end of each of the fuel supply pipe 106, the fuel return pipe 108, and the evaporation pipe 110 is fixedly attached to the pipe holding portion 118 of the pipe holding bracket 116, whereby a so-called fuel tank side pipe 120 is configured as a pipe assembly. It The lower surface, which is the back surface, of the bracket mounting portion 122 of the pipe holding bracket 116 is joined to the upper surface, which is the front surface of the tank flange 112. A mounting portion screw hole 124 is formed in the bracket mounting portion 122, and a flange screw hole 126 is formed in the tank flange 112 at the position of the mounting portion screw hole 124. Further, the screw 1 is provided on the lower surface which is the back surface of the tank flange 112.
A fixing nut 130 for screwing 28 is fixed by welding or the like. A screw hole 132 is formed in the fixing nut 130.

Therefore, the pipe holding bracket 116 is
The screw 128 is fixed to the tank flange 112 by being screwed from the upper surface side of the fuel tank 102 to the screw hole 132 of the fixing nut 130 through the mounting portion screw hole 124 and the flange screw hole 126. Further, one end sides of the fuel supply pipe 106 and the fuel return pipe 108 are fixed to one end side holding brackets 134 and attached to the fuel tank 102 by one end side screws 136. Further, the central portions of the fuel supply pipe 106, the fuel return pipe 108, and the evaporation pipe 110 are fixed to the central portion holding bracket 138, and attached to the fuel tank 102 by the central portion screw 140.

The upper surface, which is the surface of the fuel tank 102, is coated with a chipping coat or a shower coat to prevent corrosion. Therefore, in order to prevent the tightening of the screw 128 from becoming difficult due to the paint of the chipping coat or the shower coat adhering to the screw hole 132 of the fixing nut 130, the tank flange 1 of the fuel tank 102 is prevented.
Masking is performed on the fixing nut 130 on the upper surface, which is the surface of 12.

A mounting structure for such a fuel pipe is disclosed in, for example, Japanese Utility Model Laid-Open No. Sho 63-109220 and Japanese Utility Model Laid-Open No. 6-36931. Japanese Utility Model Laid-Open No. 63-109220 discloses a structure in which a fuel pipe for supplying fuel from a fuel tank to an engine and returning excess fuel to the fuel tank is attached to the fuel tank. The side wall is provided with a mounting recess, and the fuel pipe is inserted into the fuel tank by penetrating the wall surface of the mounting recess. The one described in Japanese Utility Model Laid-Open No. 6-36931 discloses that a grommet holds the connectors of a plurality of hoses in parallel so that the plurality of hoses are bundled together, and the location of a pipe to be connected to each connector. The connector holding structure is a grommet configured to be fixed to a mounting portion in the vicinity of a pipe disposing portion in order to dispose the grommet. When the divided bodies are joined together, a ridge corresponding to the outer shape of the small tube portion of each connector is formed.

[0007]

However, in the conventional fuel pipe mounting structure, since the upper surface, which is the surface of the fuel tank, is masked for the fixing nut, the masking allowance (masking There is a disadvantage in that the number of man-hours required for the tape) and the attachment / detachment increase, and the cost becomes high.

Further, in the masking of the fuel tank, it is impossible to mask only the screw hole portion of the fixing nut. Therefore, the masking tape is used to mask the periphery of the fixing nut. The corrosion prevention chipping coat and shower coat paint did not adhere to the fuel tank, and therefore there was the inconvenience that corrosion occurred from the parts where this paint did not adhere.

[0009]

Therefore, in order to eliminate the above-mentioned inconvenience, the present invention provides various pipes such as a fuel supply pipe integrally provided on a pipe holding bracket. In a fuel pipe mounting structure which is inserted into a pipe insertion hole formed in a tank flange of a fuel tank and fixedly mounts a bracket mounting portion of the pipe holding bracket to the tank flange by a screw, the back surface of the bracket mounting portion is provided with A fixing nut for screwing the screw is fixedly provided, the front surface side of the bracket mounting portion is arranged on the back surface side of the tank flange, and the bracket mounting portion is fixed to the tank flange by the screw. Is characterized by.

[0010]

According to the structure of the present invention, in the pipe holding bracket holding various pipes, the bracket mounting portion of the pipe holding bracket is located on the back side of the tank flange of the fuel tank, and the bracket mounting portion is formed by the screw. By being attached to the tank flange, it is fixed to the tank flange. Therefore, when the chipping coat or shower coat is applied to the tank flange of the fuel tank, masking is not required for the fixing nut, thus eliminating the need for masking tape and reducing the number of man-hours and the cost. You can

Further, since the fuel tank is not required to be masked in this way, the corrosion preventing chipping coat and shower coat paint can be surely adhered to the surface of the fuel tank to ensure the corrosion resistance.

Further, the pipe holding bracket can be attached to the tank flange of the fuel tank by the same attachment method as in the prior art, which is practically advantageous.

[0013]

Embodiments of the present invention will be described in detail and specifically with reference to the drawings. 1 to 7 show an embodiment of the present invention. In FIG. 1, 2 is a fuel tank mounted on a vehicle (not shown), and 4 is a fuel pump 4 installed in the fuel tank 2. One end of each of a fuel supply pipe 6 and a fuel return pipe 8 as various pipes is connected in parallel to the fuel pump 4.

The central portions of the fuel supply pipe 6 and the fuel return pipe 8 extend in parallel along the upper surface which is the surface of the fuel tank 2. Evaporative pipes 10, which are other various pipes for guiding the evaporated fuel to an engine (not shown), are provided in parallel at the central portions of the fuel supply pipe 6 and the fuel return pipe 8.

The other end of each of the fuel supply pipe 6, the fuel return pipe 8 and the evaporation pipe 10 is inserted into the elongated pipe insertion hole 14 formed in the tank flange 12 of the fuel tank 2 from above to below. Are installed.

The other end of each of the fuel supply pipe 6, the fuel return pipe 8 and the evaporation pipe 10 is held by a pipe holding bracket 16, which constitutes a fuel tank side pipe 18 (see FIGS. 4 and 5). .
The pipe holding bracket 16 includes a pipe holding portion 20 and a bracket mounting portion 22. As shown in FIG. 3, the pipe holding portion 20 is formed with a fuel supply pipe holding bay portion 24, a fuel return pipe holding bay portion 26, and an evaporation pipe holding bay portion 28.

A mounting portion screw hole 30 is formed in the bracket mounting portion 22. Also, the bracket mounting portion 2
The lower surface 22a, which is the back surface of the second member 2, has a mounting portion screw hole 30
The fixing nut 32 is fixed to the position by welding or the like. A screw hole 34 is formed in the fixing nut 32.

A flange screw hole 36 is formed in the tank flange 12 at the position of the attachment screw hole 30.

A screw 38 is inserted into the flange screw hole 36 and the mounting portion screw hole 30 from above. The screw 38 is screwed into the screw hole 34 of the fixing nut 32.

Further, one end sides of the fuel supply pipe 6 and the fuel return pipe 8 are held by one end side holding brackets 40, and the one end side holding brackets 40 are fixed to the fuel tank 2 by the one end side screws 42. As a result, the fuel tank 2 is attached.

Further, the central portions of the fuel supply pipe 6, the fuel return pipe 8 and the evaporation pipe 10 are held by a central portion holding bracket 44, and the central portion holding bracket 44 is fixed to the fuel tank 2 by the central portion screw 46. By installing this fuel tank 2
Mounted on.

The bracket mounting portion 22 has a pipe insertion hole 1
4 is inserted from the upper side to the lower side, the upper surface 22b side that is the front surface is disposed on the lower surface 12a side that is the back surface of the tank flange 12, and is joined and attached to the lower surface 12a of the tank flange 12.

Next, the operation of this embodiment will be described.

When the fuel tank side pipe 18 is attached to the tank flange 12 of the fuel tank 2, the fuel supply pipe 6, the fuel return pipe 8 and the evaporation pipe 1 are attached.
The other end side of each of 0 and the bracket mounting portion 22 is inserted through the pipe insertion hole 14 from the upper side to the lower side, and the bracket mounting portion 22 is positioned on the lower surface side of the tank flange 12.

Then, the screw 38 is attached to the tank flange 1.
The pipe holding bracket 16 is inserted into the flange screw hole 36 and the mounting portion screw hole 30 from above and screwed into the screw hole 34 of the fixing nut 32.
The bracket mounting portion 22 of is attached to the tank flange 12.

As a result, the lower surface 12 of the tank flange 12
a is a bracket mounting portion 20 of the pipe holding bracket 16
Since the tank flange 12 is provided with a mounting surface, the tank flange 12 is provided with the pipe insertion hole 14 and the flange screw hole 36 to protect the screw hole 34 portion of the fixing nut 32 from the paint of the chipping coat or the shower coat. No need for masking.

By eliminating the need for such masking, the masking cost (masking tape cost) and the number of man-hours can be reduced and the cost can be reduced. Further, the surface of the fuel tank 2 can be reliably coated with a chipping coat or a shower coat for corrosion prevention, whereby the corrosiveness of the fuel tank 2 can be secured.

Furthermore, the screw 38 can be attached from above the tank flange 12 of the fuel tank 2, and the pipe holding bracket 16 can be attached to the fuel tank 2 by the conventional attaching method, which is practically advantageous.

[0029]

As is apparent from the above detailed description, according to the present invention, a fixing nut for screwing a screw is fixedly provided on the back surface of the bracket mounting portion of the pipe holding bracket, and the surface of the bracket mounting portion is fixed. Side is located on the back side of the tank flange and the bracket mounting part is fixed to the tank flange with a screw, so that when the chipping coat or shower coat is applied to the tank flange of the fuel tank, the fixing nut Therefore, masking is not required, and thus masking tape cost is not required, and the number of working steps can be reduced and the cost can be reduced.

Further, since the masking on the fuel tank is not required in this way, the corrosion preventing chipping coat and shower coat paint can be surely adhered to the surface of the fuel tank to ensure the corrosion resistance.

Further, the pipe holding bracket can be attached to the tank flange of the fuel tank by the same attachment method as the conventional one, which is practically advantageous.

[Brief description of drawings]

FIG. 1 is a perspective view of a fuel pipe mounting structure.

FIG. 2 is a side view of an arrow 〓 in FIG.

3 is a plan view of arrow 〓 of FIG.

FIG. 4 is a plan view of a fuel tank side pipe.

FIG. 5 is a side view of a fuel tank side pipe.

FIG. 6 is a side view of a pipe holding bracket portion.

7 is a cross-sectional view taken along the line 〓-〓 of FIG.

FIG. 8 is a perspective view of a conventional fuel pipe mounting structure.

9 is a side view of arrow 〓 of FIG.

10 is a plan view of arrow 〓 of FIG.

[Explanation of symbols]

 2 Fuel Tank 6 Fuel Supply Pipe 8 Fuel Return Pipe 10 Evaporative Pipe 12 Tank Flange 14 Pipe Insertion Hole 16 Pipe Holding Bracket 18 Fuel Tank Side Pipe 22 Bracket Mounting Part 32 Fixing Nut 38 Screw

Claims (1)

[Claims] 1. Various pipes such as a fuel supply pipe are integrally held by a pipe holding bracket, and the various pipes are inserted into pipe insertion holes formed in a tank flange of a fuel tank and the pipe holding bracket is also provided. In the mounting structure of the fuel pipe provided by fixing the bracket mounting part to the tank flange with a screw, a fixing nut for screwing the screw is fixedly provided on the back surface of the bracket mounting part. A mounting structure for a fuel pipe, wherein a front surface side is arranged on a rear surface side of the tank flange, and the bracket mounting portion is fixed to the tank flange by the screw.