JP2019172230A - Fuel tank attachment structure - Google Patents

Abstract

To provide a fuel tank attachment structure which enables reduction of a concentration of a load near a fixing portion between a fuel tank and a vehicle body during a rear end collision.SOLUTION: A fuel tank attachment structure 1 attaches a fuel tank 2 made of resin to a vehicle body and includes: a tank body 20 which stores a fuel; a fixing piece 23 integrally molded with the tank body 20 and provided with a through hole 2h; a bolt 4 inserted into the through hole 2h and fixing the tank body 20 to the vehicle body; and a plate piece part 33. In the plate piece part 33, one end part 331 is supported by the fixing piece 23 and the other end side area 332 is disposed at the tank body 20 side. The other end side area 332 of the plate piece part 33 includes a facing surface 3f which is disposed facing an outer peripheral surface 2f of the tank body 20. During a rear end collision, the facing surface 3f contacts with the outer peripheral surface 2f of the tank body 20. The contact disperses a load caused by the rear end collision in a wider area of the tank body 20 to reduce a concentration of the load on the fixing piece 23 and an area around the fixing piece 23.SELECTED DRAWING: Figure 1

Description

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

  As a fuel tank of an automobile, a resin tank is used (for example, Patent Document 1). Patent Document 1 discloses a structure in which a resin fuel tank is attached to a vehicle body, and a plurality of support brackets formed integrally with a tank body for storing fuel are fixed to a fixing portion of the vehicle body with bolts and nuts.

  The resin fuel tank described above is typically integrally molded by blow molding using a parison. Specifically, as described in Patent Document 1, a split mold having an outer peripheral surface of a support bracket as a mating surface is used, and a main portion of a tubular parison is disposed in the cavities of both molds. Place the part other than the main part of the parison in a stacked state between the molds. In a state where the parison is housed in the mold, the main body is inflated by injecting compressed air into the main body to form the tank body by bringing the main body into contact with the cavity inner surface. A support bracket is formed by two overlapping positions sandwiched between both molds.

JP 2011-194916 A

  It is desirable to prevent the tank body from cracking at the time of a rear collision (hereinafter referred to as a rear collision) with respect to a resin fuel tank attached to the vehicle body.

  Here, in the resin-made fuel tank blow-molded using the parison as described above, a recess due to this manufacturing method exists in the tank body. More specifically, a region near the support bracket in the tank body is formed by the above-described two-layer parison. Therefore, a recess is formed in the vicinity of the support bracket on the inner peripheral surface of the tank body. At the time of a rear collision, the support bracket also tends to be displaced forward in accordance with the mounting bracket on the vehicle body side (see the vehicle body 4 of Patent Document 1) that is to be displaced forward of the vehicle. In particular, the support bracket on the rear side of the vehicle is displaced so as to enter the tank main body because the amount of displacement to the front of the vehicle is larger than the area on the front side of the vehicle in the tank main body. Therefore, the load accompanying the rear impact tends to concentrate on the support bracket on the vehicle rear side and in the vicinity thereof. Due to the concentration of the load, there is a possibility that the tank main body may be cracked starting from the concave portion of the tank main body described above, or in the worst case, the tank main body may be cracked.

  Accordingly, one of the objects of the present invention is to provide a fuel tank mounting structure that can reduce the concentration of a load in the vicinity of a location where the fuel tank is fixed to the vehicle body at the time of a rear collision.

A fuel tank mounting structure according to an aspect of the present invention includes:
A fuel tank mounting structure for mounting a resin fuel tank to a vehicle body,
A tank body for storing fuel;
A fixed piece formed integrally with the tank body and provided with a through hole;
A fastening member that is inserted through the through hole and fixes the tank body to the vehicle body;
A plate piece portion having one end portion supported by the fixed piece and the other end side region disposed on the tank body side;
The other end side region of the plate piece portion includes a facing surface disposed to face the outer peripheral surface of the tank body.

  It can be said that the opposing surface of the other end side region of the plate piece portion provided in the fuel tank mounting structure is disposed so as to be opposed to the outer peripheral surface of the tank body. The opposing surface of the plate piece portion is displaced at the time of rear-end collision with the fixed piece of the fuel tank as the vehicle body moves forward of the vehicle, and further with the displacement of the fixed piece, the plate piece portion moves forward of the vehicle. When displaced, it can come into contact with the outer peripheral surface of the tank body. By this contact, the load accompanying the rear collision can be dispersed, and the concentration of the load on the fixed piece and the vicinity thereof can be reduced. Therefore, the fuel tank mounting structure described above is that the fuel tank is blow-molded using a parison, and even if the inner peripheral surface has a recess in the vicinity of the fixed piece, It is possible to prevent the tank body from being cracked starting from the concave portion, and further the tank body from being cracked.

1 is a schematic cross-sectional view showing a fuel tank mounting structure according to Embodiment 1. FIG. It is a schematic perspective view which shows the cylinder metal fitting with which the fuel tank mounting structure of Embodiment 1 is equipped. It is a schematic bottom view which shows an example in the state where the fuel tank was attached to the vehicle body.

  Hereinafter, the fuel tank mounting structure of the present invention will be described in detail 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 Embodiment 1 will be described with reference to FIGS.
FIG. 3 is a bottom view of the fuel tank 2 attached to the vehicle body by the fuel tank attachment structure 1 according to the first embodiment when viewed from below the vehicle.
FIG. 1 is a partial cross-sectional view taken along line (I)-(I) 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 is the vehicle vertical direction, the horizontal direction of the paper is the vehicle front-rear direction, the upper side of the paper is the upper side of the vehicle (Up), the lower side of the paper is the lower side of the vehicle (Lwr), The right side of the page is the rear of the vehicle (Rr).

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

  Although not shown in detail, the automobile includes a vehicle body frame including a member arranged along the vehicle front-rear direction such as a side sill and a side member, and a member arranged along the vehicle width direction such as a cross member. Typically, as shown in FIG. 3, the fuel tank 2 is disposed between cross members 11 and 12 disposed at a predetermined interval in the vehicle front-rear direction, and is a bolt 4 ( The fixing piece 23 is attached to the fixing portion 10 (FIG. 1) of each cross member 11, 12 by an example of a fastening member) and a nut 5 (FIG. 1) fastened to the bolt 4. A mounting bracket or the like on the vehicle body side is used for the fixed portion 10.

  The fuel tank mounting structure 1 of Embodiment 1 includes a tank body 20, a fixing piece 23, and a bolt 4 for fixing the tank body 20 to the vehicle body. Furthermore, the fuel tank mounting structure 1 of Embodiment 1 includes a plate piece portion 33 having one end portion 331 supported by the fixed piece 23 and the other end side region 332 arranged on the tank body 20 side. The other end side region 332 of the plate piece portion 33 includes a facing surface 3 f disposed to face the outer peripheral surface 2 f of the tank body 20. The opposing surface 3f of the plate piece portion 33 is normally disposed close to the outer peripheral surface 2f of the tank body 20 (see the solid line in FIG. 1). It abuts on the surface 2f (see the two-dot chain line in FIG. 1). The plate piece portion 33 contributes to reducing the concentration of the load due to the rear collision and concentrating on the fixed piece 23 in the tank body 20 and the vicinity thereof by this contact.

  The fuel tank mounting structure 1 of this example further includes a cylindrical fitting 3 attached to the fixed piece 23, and a plate piece portion 33 is provided integrally with the cylindrical fitting 3. Specifically, the cylindrical metal fitting 3 is disposed on the cylindrical main body 30 penetrating the fixed piece 23 and the surface of the fixed piece 23 opposite to the vehicle body (the lower surface 23d in FIG. 1), and the radial direction from the outer periphery of the cylindrical main body 30 And a flange portion 31 extending outward. The plate piece portion 33 is connected to a part of the flange portion 31 in the circumferential direction (see also FIG. 3). This will be described in more detail below.

(Fuel tank)
The fuel tank 2 is a container for storing fuel such as gasoline used for the engine, and is a molded body made of resin such as polyethylene. The fuel tank 2 includes a tank main body 20 that forms the 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 selected as appropriate. 3 illustrates a case where the planar shape of the tank body 20 is a rectangular shape and is line symmetric with respect to the vehicle front-rear direction and the vehicle width direction, but may be asymmetrical (see FIG. 3 of Patent Document 1). .

<Fixed piece>
The fuel tank 2 of the present example includes two fixing pieces 23 in the tank main body 20 on the front side and the rear side of the vehicle (four in total). Each fixing piece 23 is a flat tongue piece projecting outward from an appropriate portion of the tank main body 20 (the vicinity of the corner is illustrated in FIG. 3), and is integrally formed with the tank main body 20 by the resin described above. Yes. Each fixing piece 23 is provided with a through hole 2h through which the cylinder main body 30 of the cylinder fitting 3 is inserted.

  The planar shape of each fixed piece 23 can be selected as appropriate, and FIG. 3 is an example. Further, the size of each fixing piece 23, for example, the protruding length from the tank body 20, the planar area, etc., is within the range in which the fuel tank 2 can be fixed, and the size of the metal fittings 3 and bolts 4, fastening workability, etc. An appropriate adjustment may be mentioned in consideration.

<Cylinder bracket>
"Overview"
A cylindrical fitting 3 is disposed on each fixed piece 23. The tube fitting 3 has the tube body 30 and the flange portion 31 as described above, and is provided with a through-hole 3 h that penetrates the tube body 30 and the flange portion 31. The tubular fitting 3 is disposed on the fixed piece 23 such that the tubular body 30 is inserted into the through hole 2 h of the fixed piece 23 and the axial direction of the through hole 3 h is substantially parallel to the thickness direction of the fixed piece 23. The One opening of the through hole 3h is disposed on the vehicle body side (upper side) of the fixed piece 23, and the flange portion 31 is disposed on the opposite side (lower side) of the vehicle body side. Examples of the constituent material of the tubular metal fitting 3 include metals that are superior in strength and heat resistance to the constituent resin of the tank body 20 and the fixed piece 23, such as iron and iron alloys. For the basic configuration of such a tubular fitting 3, a known flanged fitting (eg, see FIG. 4 of Patent Document 1) can be referred to.

  Furthermore, the cylindrical metal fitting 3 of this example has a plate piece portion in which one end portion 331 is connected to the flange portion 31 and the other end portion extends downward in the vehicle, and the other end side region 332 is disposed on the tank body 20 side. 33 (see also FIG. 2).

<Cylinder body>
The cylinder body 30 is a portion that has the through hole 3h as described above and penetrates the fixed piece 23. The through hole 3h in this example is a cylindrical hole having a uniform inner diameter along the axial direction. The inner diameter may be selected according to the outer diameter of the shaft portion 41 of the bolt 4. The cylinder main body 30 of this example is a cylinder having a uniform outer diameter in the axial direction, and has a coaxial outer peripheral surface on the inner peripheral surface of the cylinder forming the through hole 3h (see also FIG. 2). The planar shape (outer shape) of the tube body 30 can be changed as appropriate.

  The outer diameter of the cylinder body 30 may be selected according to the inner diameter of the through hole 2h of the fixed piece 23. In this example, the outer diameter of the cylinder body 30 is slightly larger than the inner diameter of the through hole 2h of the fixing piece 23, and the cylinder 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 main body 30 is slightly longer than the thickness of the fixed piece 23, and a region in the vicinity of one opening in the cylinder main body 30 is projected from the surface (upper surface 23 u) of the fixed piece 23 on the vehicle body side. Yes. By doing so, when the nut 5 is tightened, it is possible to make a metal contact between the tubular fitting 3 and the fixing portion 10 of the vehicle body, which can be firmly fixed. In addition, when the planar shape of the cylinder main body 30 and the flange part 31 to be described later is other than a circle, the outer diameter is the diameter of a circle circumscribing the contour of the planar shape.

<Flange part>
The flange portion 31 is a portion disposed so as to protrude from the lower surface 23 d of the fixed piece 23. One end surface (upper surface in FIG. 1) of the flange portion 31 is in contact with the lower surface 23d of the fixed piece 23, and the head 40 of the bolt 4 is disposed on the opposite end surface (lower surface in FIG. 1) via the washer 6. The

  The flange portion 31 of the present example is an annular plate that extends outward in the radial direction over the entire circumference of the cylinder body 30 and has an outer diameter larger than the outer diameter of the cylinder body 30. It arrange | positions coaxially with the hole 3h. The planar shape of the flange portion 31 of this example is similar to the cylinder body 30, but can be changed as appropriate. For example, polygonal shape etc. are mentioned.

  The outer diameter of the flange part 31 is larger than the outer diameter of the cylinder main body 30, and can be selected within a range in which the plate piece part 33 can be arranged. As illustrated in FIG. 1, the outer diameter of the flange portion 31 is such that the outer peripheral surface of the flange portion 31 excluding the connection portion of the plate piece portion 33 does not reach the outer peripheral surface of the fixed piece 23. . In addition, the thickness etc. of the flange part 31 can be selected suitably.

《Plate piece》
In this example, the plate piece portion 33 extends from a part of the flange portion 31 in the circumferential direction. The plate piece portion 33 in this example is a flat plate having a rectangular planar shape, one end in the longitudinal direction is a fixed end connected to the flange portion 31, and the other end (lower end in FIG. 1) is a free end. . The plate piece portion 33 is integrated with the flange portion 31. Since the flange portion 31 is supported by the fixed piece 23 of the fuel tank 2 by press-fitting the cylinder main body 30, as a result, the one end portion 331 that forms a connection point with the flange portion 31 in the plate piece portion 33 is formed on the fuel tank 2. It is supported by the fixed piece 23. In this example, the connecting length of the plate piece portion 33 with the flange portion 31 corresponds to about 50% of the circumferential length of the flange portion 31.

  As shown in FIGS. 1 and 2, the plate piece portion 33 of this example is bent at a right angle at the middle portion in the longitudinal direction. In a state where the cylindrical metal fitting 3 having such a plate piece portion 33 is attached to the fixed piece 23 of the fuel tank 2, the one end portion 331 and a region in the vicinity thereof are arranged along the flange portion 31 as shown in FIG. The other end side region 332 is separated from the cylinder main body 30 and the flange portion 31 and is disposed close to the tank main body 20. More specifically, of the front and back surfaces of the plate piece portion 33, the one end portion 331 and the vicinity thereof are arranged along the vehicle body side surface and the opposite surface (upper and lower surfaces in FIG. 1) of the flange portion 31. The region (other end side region 332) extending from the above-mentioned bent portion to the other end is arranged so as to be substantially parallel to the axis of the flange portion 31. The surface (one surface) of the other end side region 332 includes a facing surface 3 f disposed to face the outer peripheral surface 2 f of the tank body 20.

  The planar shape of the plate piece portion 33 can be changed as appropriate. For example, a trapezoidal shape that is wider from one end (fixed end) to the other end (free end) can be used. Or the shape where the one end part 331 of the board piece part 33 and the area | region of the vicinity are rectangular shape, and the other end side area | region 332 is wide trapezoid shape toward the free end side etc. are mentioned. If the other end side region 332 is the trapezoidal shape described above, it is easy to ensure a large area of the facing surface 3f disposed to face the outer peripheral surface 2f of the tank body 20. Since the area of the opposing surface 3f is large, the opposing surface 3f is likely to come into surface contact with the outer peripheral surface 2f of the tank body 20 at the time of a rear collision or the like. Furthermore, when the outer peripheral surface 2 f of the tank main body 20 has a curved shape, the other end side region 332 may be curved along the outer peripheral surface 2 f of the tank main body 20. In this case, the opposing surface 3f of the plate piece portion 33 is likely to come into surface contact with the outer peripheral surface 2f of the tank body 20 at the time of a rear collision or the like.

The size (thickness, width, length, length and area of the opposing surface 3f, length from one end to the bent portion, etc.) can be selected as appropriate.
The thickness and width of the plate piece portion 33 in this example are uniform throughout the plate piece portion 33.
Although the thickness of the plate piece part 33 of this example is thinner than the thickness of the flange part 31, it can change suitably. For example, it is mentioned that the thickness of the plate piece part 33 is equivalent to the thickness of the flange part 31. Since the plate piece portion 33 is thin to some extent, it is easy to make a light and small tubular fitting 3.
The width of the plate piece portion 33 in this example is substantially equal to the outer diameter of the flange portion 31, but may be smaller or larger than the outer diameter. Since the width is equal to the outer diameter of the flange portion 31, it is easy to secure a large area (width × length) of the facing surface 3 f, and it is easy to attach the tubular fitting 3 having the plate piece portion 33 to the fixed piece 23, Excellent workability.
The length of the plate piece portion 33 of this example is such that the position of the other end (here, the lower end of the plate piece portion 33) is located below the head 40 of the bolt 4 in a state where the fuel tank 2 is attached to the vehicle body. It is adjusted to the degree. Thus, since the length is long to some extent, it is easy to ensure a large area (width × length) of the facing surface 3f.
In this example, the length from one end to the bent portion (here, the minimum distance from the outer peripheral surface of the flange portion 31 to the bent portion) is usually the opposing surface 3f of the plate piece portion 33 and the outer peripheral surface 2f of the tank body 20. Is adjusted so that a predetermined gap g is provided between them (FIGS. 1 and 3).

  Since the plate piece portion 33 of this example is formed integrally with the tubular fitting 3, the constituent material of the plate piece portion 33 is the same as the constituting material of the tubular fitting 3. The plate piece portion 33 made of metal such as iron or iron alloy has high rigidity, and it is easy to obtain a load distribution effect at the time of rear collision.

  When the fixing pieces 23 of the fuel tank 2 are provided on the front side and the rear side of the vehicle, respectively, the tubular fitting 3 provided with the plate piece portion 33 is disposed on the fixing piece 23 on the rear side of the vehicle as in this example. It is preferable to obtain a load distribution effect at the time of rear collision appropriately (see FIG. 3). In addition to the fixed piece 23 on the vehicle rear side, the tubular fitting 3 including the plate piece portion 33 may be arranged on the fixed piece 23 on the vehicle front side.

"Production method"
The production of the tank body 20 and the fixed piece 23 of the fuel tank 2 includes, for example, using a molding method such as blow molding using a parison (see Patent Document 1). After molding, the through-hole 2h is provided in the fixed piece 23, and before the fuel tank 2 is attached, the tubular fitting 3 is fitted into the through-hole 2h. In this example, the tubular fitting 3 is fitted into the through-hole 2h so that the opposing surface 3f of the plate piece 33 is opposed to the outer peripheral surface 2f of the tank body 20.

  Instead of the above-described press-fitting, the inner diameter of the through hole 2h may be slightly larger than the outer diameter of the cylinder main body 30, and the cylinder main body 30 may be inserted into the through hole 2h. Alternatively, the through hole 2h is a female screw hole, a male screw is provided on the outer peripheral surface of the cylinder main body 30, and the cylinder main body 30 is screwed into the through hole 2h to integrate the cylindrical metal fitting 3 with the fixed piece 23. Alternatively, it is possible to perform injection molding or the like locally at the time of blow molding, and to integrate the cylindrical fitting 3 into 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 with the constituent resin of the fixing piece 23 in the cylinder body 30 can be increased. Excellent fixing strength with the tube fitting 3. In any of the above-described cases, the tubular metal fitting 3 is attached to the fixed piece 23 so that the opposing surface 3f of the plate piece portion 33 is disposed to face the outer peripheral surface 2f of the tank body 20.

<Fastening member>
The fastening member in this example is a bolt 4. The head portion 40 of the bolt 4 is typically brought into contact with the flange portion 31 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 and further inserted into the fixing portion 10 of the vehicle body (FIG. 1), and the nut 5 is tightened at 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 effects)
In the plate piece portion 33 provided in the fuel tank mounting structure 1 of the first embodiment, the other end side region 332 arranged on the tank main body 20 side of the fuel tank 2 is normally arranged close to the outer peripheral surface of the tank main body 20. Is done. One surface of the other end side region 332, here the opposing surface 3f, is disposed opposite to the outer peripheral surface 2f of the tank body 20 with a predetermined gap g as shown by a solid line in FIG. When the fixed piece 23 of the fuel tank 2 is displaced forward with the displacement of the vehicle body forward of the vehicle at the time of a rear collision, the plate piece portion 33 supported by the fixed piece 23 is also displaced forward with the fixed piece 23. To do. As a result, the gap g disappears, and the facing surface 3f of the plate piece portion 33 comes into contact with the outer peripheral surface 2f of the tank body 20. By this contact, the load accompanying the rear collision can be distributed over a wider range of the tank body 20, and the concentration of the load on the fixed piece 23 and the vicinity thereof can be reduced.

(Main effect)
As described above, the fuel tank mounting structure 1 of Embodiment 1 includes the fixed piece 23 of the fuel tank 2 and the plate piece portion 33 that can reduce the concentration of the load in the vicinity thereof at the time of rear collision. Therefore, in the fuel tank mounting structure 1 of the first embodiment, the fuel tank 2 is manufactured by blow molding using a parison or the like, and has a recess 2 c in the vicinity of the formation location of the fixing piece 23 on the inner peripheral surface of the tank body 20. Even in this case, it is possible to prevent the tank main body 20 from cracking from the concave portion 2c and the tank main body 20 from cracking at the time of rear collision.

  In the fuel tank mounting structure 1 of this example, since the plate piece portion 33 is integrated with the cylindrical metal fitting 3, the number of parts is not increased compared to the case where the plate piece portion 33 is a separate member. Excellent manufacturability. Also, the cost can be reduced.

The present invention is not limited to the configuration of the first embodiment described above, and can be changed as appropriate.
(1) For example, the plate piece part 33 is extended from the outer periphery of the upper end position or intermediate position of the flange part 31 in the thickness direction.
(2) For example, it is mentioned that the plate piece part 33 is not integrated with the tubular fitting 3 and is a member independent of the tubular fitting 3.
In this case, for example, the plate piece portion is supported by the fixed piece 23 by interposing one end portion of the plate piece portion between the lower surface 23 d of the fixed piece 23 and the flange portion 31. If one end part of the plate piece part is formed in a C shape or a through hole is provided in one end part so that the tube body 30 of the tube fitting 3 is inserted into the inside of the C shape or the through hole, the plate piece It is easy to prevent the part from coming off the fixed piece 23. An example of a member that is independent of the tube fitting 3 and includes the plate piece portion 33 is a washer 6. That is, the one having the washer 6 at one end of the plate piece 33 and the opposing surface 3f in the other end region can be mentioned.

DESCRIPTION OF SYMBOLS 1 Fuel tank mounting structure 2 Fuel tank 2h Through-hole, 2f Outer peripheral surface, 2c Concave part 20 Tank main body, 23 Fixed piece, 23u upper surface, 23d Lower surface (surface on the opposite side to a vehicle body)
3 Cylinder fitting 3h Through-hole, 3f Opposing surface 30 Cylinder body, 31 Flange part, 33 Plate piece part 331 One end part, 332 Other end side area 4 Bolt (fastening member), 40 Head part, 41 Shaft part, 5 Nut, 6 Washer 10 Fixed part, 11, 12 Cross member g Clearance

Claims (1)

A fuel tank mounting structure for mounting a resin fuel tank to a vehicle body,
A tank body for storing fuel;
A fixed piece formed integrally with the tank body and provided with a through hole;
A fastening member that is inserted through the through hole and fixes the tank body to the vehicle body;
A plate piece portion having one end portion supported by the fixed piece and the other end side region disposed on the tank body side;
The fuel tank mounting structure, wherein the other end side region of the plate piece includes a facing surface disposed to face the outer peripheral surface of the tank body.

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