JP7015718B2 - Fuel tank mounting structure - Google Patents

Description

The present invention relates to a fuel tank mounting structure for mounting a fuel tank on a vehicle body.

Resin-made fuel tanks are used as fuel tanks for automobiles (eg, Patent Documents 1 and 2). Patent Document 1 has a structure in which a resin fuel tank is attached to a vehicle body, in which a plurality of support brackets are integrally molded on a tank body for storing fuel, bolts are inserted into each support bracket and a fixing point of the vehicle body, and a nut is used. Disclose the structure for tightening. Each support bracket is a tongue piece protruding from the tank body, and the bolt insertion hole is formed by a metal collar penetrating the tongue piece (see FIG. 4 of Patent Document 1). The metal collar is a flanged metal fitting composed of a cylindrical cylinder body and an annular flange portion extending radially outward from the outer circumference of the cylinder body. The flange portion is arranged on the surface (lower surface in the vertical direction of the vehicle) opposite to the fixing portion of the vehicle body in the support bracket.

Patent Document 2 discloses a structure in which a tank body is arranged and a plurality of bands are bridged between two cross members arranged apart from each other in the front-rear direction of the vehicle, and the lower surface of the tank body is supported by these bands. do.

Japanese Unexamined Patent Publication No. 2011-194916 Japanese Unexamined Patent Publication No. 2012-066633

It is desired to improve the flame resistance performance when the resin fuel tank is attached to the vehicle body.

When the lower part of the tank body is exposed to a flame with the resin fuel tank attached to the vehicle body, the flame heats the fuel tank and the resin constituting the support bracket described above softens or melts. It is conceivable that the fixed state of the fuel tank with respect to the vehicle body will be loosened. In the worst case, the fuel tank can fall if it is loosened.

When a band as described in Patent Document 2 is used, it is necessary to use a band having a length across the tank body, which causes an increase in weight. Further, since the long band is arranged at a predetermined place, the working time tends to be long, which may lead to a decrease in productivity. In addition, it can lead to increased costs. When, for example, a protective cover that covers the entire lower surface of the tank body is provided instead of the band, the weight is likely to be further increased and the productivity is likely to be further reduced.

Therefore, one of the objects of the present invention is to provide a mounting structure for a fuel tank having excellent flame resistance.

The mounting structure of the fuel tank according to one aspect of the present invention is
It is a fuel tank mounting structure that mounts a fuel tank made of resin to the vehicle body.
A fixed piece that is integrally molded with the tank body that stores fuel,
A tubular metal fitting having a tubular body penetrating the fixed piece and a flange portion of the fixed piece arranged on a surface of the fixed piece opposite to the vehicle body and extending radially outward from the outer periphery of the tubular body. ,
A fastening member that is inserted into the tubular metal fitting and fixes the tank body to the vehicle body is provided.
The flange portion is
An intervening cylinder portion of the fixed piece that comes into contact with the surface of the fixed piece opposite to the vehicle body,
An outer side of the fixed piece, which is arranged with a predetermined gap in the axial direction of the tubular metal fitting with respect to the surface of the fixed piece opposite to the vehicle body, and extends outward in the radial direction from the outer periphery of the intervening tubular portion. It has a stepped shape with a flange portion.

In the above fuel tank mounting structure, the flange portion of the cylinder fitting provided on the fixed piece has multiple stages of the intervening cylinder portion and the outer flange portion, and the outer flange portion protrudes from the outer periphery of the intervening cylinder portion. It has a large outer diameter and is arranged with a gap for the fixed piece. In such a fuel tank mounting structure, the fixed piece, particularly the region near the cylinder body of the cylinder fitting, softens or melts when the lower part of the tank body is exposed to a flame from the following points. Can be reduced to prevent the fuel tank from loosening. Therefore, the above fuel tank mounting structure is excellent in flame resistance.

(1) Looking at the mounting structure of the fuel tank from below the vehicle, the area near the cylinder body in the fixed piece is covered by the outer flange portion.
Since the outer flange portion is generally made of a metal having a higher flame resistance than the resin, it is possible to prevent the fixed piece made of the resin, particularly the region near the cylinder body described above, from being directly exposed to the flame.
(2) The fixed piece can be kept away from the flame according to the gap provided between the fixed piece and the outer flange portion, and the heat of the outer flange portion can be difficult to transfer to the fixed piece.
(3) With respect to the surface of the fixed piece opposite to the vehicle body (hereinafter, may be referred to as a lower surface), the contact area with the tubular metal fitting is about the size of the end surface of the intervening tubular portion. Therefore, the contact area can be reduced as compared with the case where the large-diameter flange portion does not have an intervening cylinder portion and directly contacts the lower surface of the fixed piece, and softening due to heat conduction from the flange portion to the fixed piece, etc. The point that it is easy to reduce.

Further, since the mounting structure of the fuel tank can be constructed by changing the shape of the conventional metal collar, the increase in weight can be made very small as compared with the case of using the band, the protective cover, or the like described above. Further, the above-mentioned fuel tank mounting structure can be constructed by substantially the same work as the case of having the above-mentioned conventional metal collar, and the productivity is not likely to be lowered.

It is a schematic sectional drawing which shows the mounting structure of the fuel tank of Embodiment 1. FIG. It is a schematic bottom view which shows the mounting structure of the fuel tank of Embodiment 1. FIG. It is a schematic bottom view which shows an example of the state which the fuel tank is attached to the vehicle body.

Hereinafter, the mounting structure of the fuel tank of the present invention will be specifically described with reference to the drawings. In the figure, the same reference numerals indicate the same names.

[Embodiment 1]
The fuel tank mounting structure 1 of the first embodiment will be described with reference to FIGS. 1 to 3.
FIG. 3 is a bottom view of the fuel tank 2 mounted on the vehicle body by the fuel tank mounting structure 1 of the first embodiment as viewed from below the vehicle.
FIG. 2 is a partially enlarged view of FIG. 3, and shows an enlarged view of the vicinity of the fuel tank mounting structure 1 of the first embodiment.
FIG. 1 is a partial cross-sectional view cut along the (I)-(I) cutting line shown in FIG.
In FIG. 3, the left-right direction of the paper surface is the vehicle width direction, the upper side of the paper surface is the front of the vehicle (Fr), and the lower side of the paper surface is the rear of the vehicle (Rr).
In FIG. 1, the vertical direction of the paper surface is the vertical direction of the vehicle, the upper side of the paper surface is the upper side of the vehicle (Up), and the lower side of the paper surface is the lower side of the vehicle (Lwr).

(overall structure)
The fuel tank mounting structure 1 of the first embodiment is used to mount a fuel tank 2 for storing fuel used in an automobile engine at a predetermined position of an automobile. The fuel tank 2 is made of resin, and the fixing piece 23 is integrally molded with the tank body 20 for storing fuel (FIG. 3).

Although details are not shown, the automobile includes a body frame including members arranged along the vehicle front-rear direction such as side sills and side members, and members arranged along the vehicle width direction such as cross members. As shown in FIG. 3, the fuel tank 2 is typically arranged between the cross members 11 and 12 arranged at predetermined intervals in the front-rear direction of the vehicle, and has a bolt 4 (an example of a fastening member) and a nut. According to 5 (FIG. 1), the fixing piece 23 is attached to and fixed to the fixing portion 10 (FIG. 1, an example of the vehicle body) of each of the cross members 11 and 12.

As shown in FIG. 1, the fixing piece 23 is provided with a metal fitting with a flange (cylinder metal fitting 3) for forming an insertion hole for the bolt 4, and the fuel tank mounting structure 1 of the first embodiment includes the fixing piece 23 and the fixing piece 23. A cylinder metal fitting 3 and a bolt 4 that is inserted through the cylinder metal fitting 3 and fixes the tank body 20 to the vehicle body are provided. The flange portion 31 of the tubular metal fitting 3 is arranged on the surface of the fixed piece 23 opposite to the vehicle body, that is, on the lower surface 233 in the vertical direction of the vehicle. In the fuel tank mounting structure 1 of the first embodiment, the flange portion 31 has a multi-stage stepped shape having an intervening cylinder portion 32 and an outer flange portion 33. The outer flange portion 33 is arranged with a predetermined gap g in the axial direction (vertical direction in FIG. 1) of the cylinder fitting 3 with respect to the lower surface 223 of the fixed piece 23, and has a diameter from the outer periphery of the intervening cylinder portion 32. It extends outward in the direction and protrudes outward from the intervening cylinder portion 32. The flange portion 31 having such a specific stepped shape prevents the fixed piece 23 from softening or melting when the lower part of the fuel tank 2 is exposed to a flame. Hereinafter, a more detailed description will be given.

(Fuel tank)
The fuel tank 2 is a container for storing fuel such as gasoline used in an engine, and is a molded body made of a resin such as polyethylene. The fuel tank 2 includes a tank main body 20 that forms a fuel storage space, and a fixing piece 23 that protrudes outward from the tank main body 20 and is used for fixing to the vehicle body. The planar shape of the tank body 20 can be appropriately selected. FIG. 3 illustrates a case where the planar shape of the tank body 20 is rectangular and is line-symmetrical in the vehicle front-rear direction and the vehicle width direction, but the shape can be asymmetrical (see Patent Documents 1 and 2).

<Fixed piece>
The fuel tank 2 of this example includes two fixed pieces 23 at the front of the vehicle and at the rear of the vehicle in the tank body 20 (four in total). Each fixed piece 23 is a flat plate-shaped tongue piece that protrudes outward from an appropriate portion of the tank body 20 (the vicinity of the corner is illustrated in FIG. 3), and is integrally molded with the tank body 20 by the above-mentioned resin. There is. The planar shape of each fixed piece 23 can be appropriately selected, and FIGS. 2 and 3 are examples.

The size of each fixed piece 23 can be appropriately selected within a range in which the fuel tank 2 can be fixed, and is preferably selected within a range that does not cause an increase in weight or an increase in size. For example, the thicker the fixed piece 23 is, the less likely it is to soften even when exposed to the above-mentioned flame, and the more excellent the flame resistance is. However, it tends to increase the weight. The length of protrusion from the tank body 20 of the fixed piece 23, the plane area, and the like may be adjusted in consideration of the sizes of the tubular metal fittings 3 and the bolts 4, the fastening workability, and the like. In this example, each fixing piece 23 is provided with a through hole 2h through which the cylinder body 30 of the cylinder metal fitting 3 is inserted.

<Cylinder metal fittings>
Each fixing piece 23 is provided with a tubular metal fitting 3 having a through hole 3h. The tubular metal fitting 3 is made of a metal having higher flame resistance and heat resistance than the constituent resins of the tank body 20 and the fixing piece 23. Examples of the metal include iron and iron alloys.

In the tubular metal fitting 3 of this example, the tubular body 30 is inserted through the through hole 2h of the fixed piece 23, one opening of the through hole 3h is arranged on the vehicle body side (upper side) of the fixed piece 23, and the other opening. Is placed on the opposite side (lower side) of the car body. Further, the tubular metal fitting 3 is arranged on the fixed piece 23 so that the axial direction of the through hole 3h is substantially parallel to the thickness direction of the fixed piece 23.

The through hole 3h in this example is a cylindrical hole having a uniform inner diameter along the axial direction thereof. Therefore, the inner peripheral surface of the tubular metal fitting 3 in this example is a cylindrical surface having a uniform inner diameter. The inner diameter may be selected according to the outer diameter of the shaft portion 41 of the bolt 4.

The cylinder metal fitting 3 has a cylinder body 30 penetrating the fixing piece 23, and a flange portion 31 extending radially outward from the outer periphery of the cylinder body 30. The flange portion 31 is arranged on the surface (lower surface 233) of the fixed piece 23 opposite to the vehicle body. Further, the flange portion 31 includes an intervening cylinder portion 32 that is in contact with the lower surface 233 of the fixed piece 23, and an outer flange portion 33 that protrudes outward from the outer periphery of the intervening cylinder portion 32. The outer flange portion 33 does not come into contact with the lower surface 233 of the fixed piece 23, and is arranged away from the lower surface 233 toward the side opposite to the vehicle body. A predetermined gap g is provided between the outer flange portion 33 and the lower surface 233 of the fixed piece 23. The outer flange portion 33 of this example extends radially outward of the intervening cylinder portion 33 from the outer edge of the intervening cylinder portion 33 on the side opposite to the vehicle body. Therefore, the gap g corresponds to the thickness t of the intervening cylinder portion 32. Such a cylinder metal fitting 3 has a two-stage structure of a cylinder body 30 and a flange portion 31, and further has a three-stage structure of a cylinder body 30, an intervening cylinder portion 32, and an outer flange portion 33. With respect to the cylinder body 30, the intervening cylinder portion 32, and the outer flange portion 33 forming each stage, the outer diameters R ₃₀ , R ₃₂ , and R ₃₃ become larger toward the side (lower side) away from the vehicle body (R ₃₀ <R ₃₂ <. R ₃₃ ).

《Cylinder body》
The cylinder body 30 is a portion that penetrates the fixed piece 23 as described above. The cylinder body 30 of this example is a cylinder having a uniform outer diameter R ₃₀ in the axial direction thereof, and has a coaxial outer peripheral surface on the inner peripheral surface of the cylinder forming the through hole 3h. The planar shape (outer shape) of the cylinder body 30 can be changed as appropriate.

The outer diameter R ₃₀ of the cylinder body 30 may be selected according to the inner diameter of the through hole 2h of the fixed piece 23. The outer diameter R ₃₀ of this example is slightly larger than the inner diameter of the through hole 2h of the fixing piece 23, and the cylinder metal fitting 3 can be fixed to the fixing piece 23 by press-fitting the cylinder body 30 into the through hole 2h. The length of the cylinder body 30 may be selected according to the thickness of the fixed piece 23. In this example, the length of the cylinder body 30 is slightly longer than the thickness of the fixed piece 23, and the region near one opening in the cylinder body 30 is projected from the vehicle body side surface (upper surface 231) of the fixed piece 23. There is. By doing so, when the nut 5 is tightened, the metal contact between the tubular metal fitting 3 and the fixing portion 10 of the vehicle body can be achieved, and the nut 5 can be firmly fixed. When the planar shape of the tubular body 30, the intervening tubular portion 32, which will be described later, and the outer flange portion 33 are other than circular, the outer diameters R ₃₀ , R ₃₂ , and R ₃₃ are the diameters of circles circumscribing the contour of the planar shape. ..

《Flange part》
The flange portion 31 is a portion that is arranged so as to project from the lower surface 233 of the fixed piece 23. The flange portion 31 of this example has a two-stage shape as described above, and the upper stage in the vertical direction of the vehicle is the intervening cylinder portion 32, and the lower stage is the outer flange portion 33. The upper surface of the intervening cylinder portion 32 forming one end surface of the flange portion 31 is in contact with the lower surface 233 of the fixed piece 23, and the lower surface of the outer flange portion 33 forming the opposite end surface is flanged from the lower surface 233 of the fixed piece 23. They are arranged apart by the thickness of the portion 31.

The intervening cylinder portion 32 of this example is a cylinder having a uniform outer diameter R ₃₂ in the axial direction thereof, and has a coaxial outer peripheral surface on the inner peripheral surface of the cylinder forming the through hole 3h. The planar shape of the intervening cylinder portion 32 can be changed as appropriate. For example, when the flame-resistant member 7 described later is provided, if the intervening cylinder portion 32 has an annular groove portion or a plurality of groove portions arranged apart from each other in the circumferential direction, and the flame-resistant member 7 has a protrusion that fits into the groove portion, the flame-resistant member It is possible to make it difficult for the 7 to be misaligned or for it to fall. When the flameproof member 7 is welded to the tubular metal fitting 3, stable welding workability can be performed and the workability is excellent.

The outer diameter R ₃₂ of the intervening cylinder portion 32 can be appropriately selected within a range larger than the inner diameter of the through hole 3h and the outer diameter R ₃₀ of the cylinder body 30. The larger the outer diameter R ₃₂ of the intervening cylinder portion 32, the larger the area covering the fixed piece 23 on the upper surface (end surface) of the intervening cylinder portion 32, and the area in the vicinity of the cylinder body 30 in the intervening cylinder portion 23 is exposed to the flame. Can be reduced. As a result, it is possible to prevent the fuel tank 2 from being loosened. However, increasing the diameter of the intervening cylinder portion 32 tends to increase the weight of the cylinder fitting 3 and the amount of heat conduction to the fixed piece 23 via the intervening cylinder portion 32. As an example of FIG. 1, the outer diameter R ₃₂ of the intervening cylinder portion 32 is set so that the outer peripheral surface of the intervening cylinder portion 32 does not protrude from the outer edge of the fixed piece 23.

The thicker the thickness t of the intervening cylinder portion 32, the more effectively it is possible to prevent the fixed piece 23 from being exposed to the flame. In this example, since the thickness t corresponds to the distance from the lower surface 233 of the fixed piece 23 to the outer flange portion 33, the thicker the thickness t, the more the gap between the lower surface 233 of the fixed piece 23 and the outer flange portion 33. A large amount of g can be secured. From this point as well, it is possible to effectively prevent the fixed piece 23 from being exposed to the flame. However, the thicker the thickness t, the more likely it is that the weight of the tubular metal fitting 3 will increase. The thickness t may be, for example, about 10% to 50% of the length of the cylinder body 30.

The outer flange portion 33 extends radially outward over the entire circumference of the intervening cylinder portion 32. The outer flange portion 33 of this example is an annular plate having a uniform outer diameter R ₃₃ in the axial direction thereof, and has a coaxial outer peripheral surface on the inner peripheral surface of the cylinder forming the through hole 3h. That is, the planar shape of the outer flange portion 33 is similar to that of the cylinder body 30 and the intervening cylinder portion 32, and the outer peripheral surface of the cylinder fitting 3 does not have a cylindrical surface having a uniform outer diameter, and three different outer diameters _R30 . , R ₃₂ , R ₃₃ consists of three cylindrical surfaces. The planar shape of the outer flange portion 33 can be changed as appropriate. For example, a polygonal shape and the like can be mentioned.

The outer diameter R ₃₃ of the outer flange portion 33 can be appropriately selected within a range larger than the outer diameter R ₃₂ of the intervening cylinder portion 32. As the outer diameter R ₃₃ of the outer flange portion 33 is larger, the area covered by the outer flange portion 33 can be increased when the fixing piece 23 and the tubular metal fitting 3 are viewed from below the vehicle as shown in FIG. Therefore, it is possible to effectively prevent the region near the cylinder body 30 of the fixed piece 23 from being exposed to the flame. As a result, it is possible to prevent the fuel tank 2 from being loosened. For example, if the outer diameter R ₃₃ of the outer flange portion 33 is such that the outer peripheral surface of the outer flange portion 33 protrudes from the outer peripheral surface of the fixed piece 23, the fixed piece 23 is more reliably prevented from being exposed to the flame. Easy to do. However, increasing the diameter of the outer flange portion 33 tends to increase the weight of the tubular metal fitting 3. The outer diameter R ₃₃ of the outer flange portion 33 may be such that the outer peripheral surface of the outer flange portion 33 extends to the outer peripheral surface of the fixed piece 23 as illustrated in FIG.

The thicker the outer flange portion 33 is, the more effectively the fixing piece 23 can be prevented from being exposed to the flame, but the weight of the tubular metal fitting 3 is likely to increase. Further, even if the thickness of the outer flange portion 33 is thin to some extent, the large outer diameter R ₃₃ can prevent the fixed piece 23 from being exposed to flame. As illustrated in FIG. 1, the thickness of the outer flange portion 33 may be thinner than the thickness t of the intervening cylinder portion 32, and examples thereof include about 10% to 50% of the thickness t.

"Production method"
For the production of the tank body 20 and the fixed piece 23 of the fuel tank 2, for example, a molding method such as blow molding may be used (see Patent Document 1). After molding, the fixing piece 23 is provided with a through hole 2h, and the cylinder metal fitting 3 is fitted into the through hole 2h before the fuel tank 2 is attached. Instead of the above-mentioned press fitting, the inner diameter of the through hole 2h may be slightly larger than the outer diameter R ₃₀ of the cylinder body 30, and the cylinder body 30 may be inserted into the through hole 2h. Alternatively, the through hole 2h may be a female screw hole, a male screw may be provided on the outer peripheral surface of the cylinder body 30, and the cylinder body 30 may be screwed into the through hole 2h to integrate the cylinder fitting 3 into the fixing piece 23. Alternatively, at the time of blow molding, injection molding or the like is locally performed, and the tubular metal fitting 3 is integrated with the fixed piece 23 by insert molding. In the case of insert molding, if the cylinder body 30 is, for example, a polygonal cylinder or a cylinder having irregularities on the outer surface, the contact area of the fixing piece 23 in the cylinder body 30 with the constituent resin can be increased, and the fixing piece 23 and the fixing piece 23 can be formed. Excellent fixing strength with the cylinder metal fitting 3.

<Fastening member>
The fastening member in this example is a bolt 4. The head 40 of the bolt 4 is typically abutted on the outer flange portion 33 via the washer 6. The shaft portion 41 of the bolt 4 is inserted into the through hole 3h of the tubular metal fitting 3, further inserted into the fixing portion 10 of the vehicle body (FIG. 1), and the nut 5 is tightened to the tip portion thereof. By this tightening, the fuel tank 2 is fixed to the vehicle body via the fixing piece 23, and the fuel tank mounting structure 1 of the first embodiment can be constructed. Known bolts 4 and nuts 5 can be used.

(Main effect)
The fuel tank mounting structure 1 of the first embodiment includes a tubular metal fitting 3 having a flange portion 31 having a specific stepped shape on a fixed piece 23 of the fuel tank 2, so that the fuel tank is exposed to a flame from below the vehicle. It is possible to prevent the mounting state of 2 from loosening, and it has excellent flame resistance. The outer flange portion 33 has an outer diameter R ₃₃ large enough to protrude from the outer periphery of the intervening cylinder portion 32, and the area in the vicinity of the cylinder body 30 of the cylinder fitting 3 in the resin fixing piece 23 is the entire circumference of the cylinder body 30. This is because it can be covered with the outer flange portion 33 made of metal. Further, a gap g is provided between the fixed piece 23 and the outer flange portion 33 to keep the fixed piece 23 away from the flame, and it is difficult to transfer the heat of the large-diameter outer flange portion 33 to the fixed piece 23. Is. Further, although the outer flange portion 33 has a large diameter, the contact area of the lower surface 233 of the fixing piece 23 with the flange portion 31 is as small as the size of the upper surface (end surface) of the intervening cylinder portion 32, and is fixed from the flange portion 31. This is because it is easy to reduce softening due to heat conduction to the piece 23.

In particular, the fuel tank mounting structure 1 of this example has a simple configuration of changing the shape of the metal collar as compared with the case of having the above-mentioned conventional metal collar, and the flame resistance can be improved without increasing the number of parts. On top, the weight increase can be very small. It is hard to invite an increase in cost. Further, the installation work of the fuel tank 2 is substantially the same as that of the case of having the above-mentioned conventional metal collar, and it is difficult to cause a decrease in productivity.

The present invention is not limited to the configuration of the first embodiment described above, and can be appropriately modified.
(1) For example, as virtually shown by a two-dot chain line in FIG. 1, a flameproof member 7 arranged between the fixed piece 23 and the outer flange portion 33 may be provided.
By providing the flame resistant member 7, it is easier to prevent the fixed piece 23 from being directly exposed to the flame than when the gap g is air. In particular, if the outer periphery of the flameproof member 7 has a size protruding outward from the outer periphery of the outer flange portion 33, and further has a size protruding from the outer peripheral surface of the fixed piece 23, the fixed piece 23 becomes a flame. It is easier to prevent exposure.

An example of the flame resistant member 7 is a washer made of a metal such as iron or an iron alloy. When this washer is fixed to the tubular metal fitting 3 by welding or the like, it can be firmly fixed to the tubular metal fitting 3 and can be prevented from falling off. Therefore, as illustrated in FIG. 1, the thickness of the washer can be made thinner than the size of the gap g.
Another example of the flame-resistant member 7 is a sheet material made of an elastic material such as rubber. When this sheet material is press-fitted between the lower surface 233 of the fixed piece 23 and the outer flange portion 33, for example, it is possible to prevent misalignment, dropout, and the like. Therefore, the thickness of the sheet material can be made thicker than the size of the gap g.
In addition, as the flame resistant member 7, various materials having excellent flame resistance can be appropriately used. For example, a plate material made of ceramic fibers such as rock wool and glass wool, a felt sheet, and the like can be mentioned. Alternatively, the refractory member 7 may be formed by directly spraying rock wool on at least the surface of the outer flange portion 33 on the vehicle body side. A part of the spraying material may be provided on the surface of the outer flange portion 33 opposite to the vehicle body, the washer 6, and the like.

(2) For example, the outer flange portion 33 may extend from the outer periphery of the intermediate position in the axial direction of the intervening cylinder portion 32.
Even in this case, since the gap g is provided between the lower surface 233 of the fixing piece 23 and the outer flange portion 33, the fixing piece 23 can be kept away from the flame as described above, and the heat of the outer flange portion 33 is transferred to the fixing piece. It's hard to tell 23. The above-mentioned flame-resistant member 7 may be provided in this gap g.

1 Fuel tank mounting structure 2 Fuel tank 20 Tank body, 23 Fixed piece, 231 Top surface, 233 Bottom surface (face opposite to the vehicle body)
2h through hole 3 cylinder metal fittings 30 cylinder body, 31 flange part, 32 intervening cylinder part, 33 outer flange part 3h through hole 4 bolt (fastening member), 40 head, 41 shaft part, 5 nuts, 6 washers 7 flameproof member 10 Fixed location, 11,12 cross member, g gap

Claims (1)

It is a fuel tank mounting structure that mounts a fuel tank made of resin to the vehicle body.
A fixed piece that is integrally molded with the tank body that stores fuel,
A tubular metal fitting having a tubular body penetrating the fixed piece and a flange portion of the fixed piece arranged on a surface of the fixed piece opposite to the vehicle body and extending radially outward from the outer periphery of the tubular body. ,
A fastening member that is inserted into the tubular metal fitting and fixes the tank body to the vehicle body is provided.
The flange portion is
An intervening cylinder portion of the fixed piece that comes into contact with the surface of the fixed piece opposite to the vehicle body,
An outer side of the fixed piece, which is arranged with a predetermined gap in the axial direction of the tubular metal fitting with respect to the surface of the fixed piece opposite to the vehicle body, and extends outward in the radial direction from the outer periphery of the intervening tubular portion. A mounting structure for a fuel tank that has a stepped shape with a flange.

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