JP7109278B2 - Structure around fuel filler - Google Patents

Description

TECHNICAL FIELD The present invention relates to a structure around a fuel filler port using a protective cover that has excellent rear collision resistance, is easy to attach and detach, and has recyclability when a resin fuel filler pipe is used.

From the viewpoint of reducing the weight of automobiles and securing interior space, the use of resin is also progressing in the fuel supply route due to its good moldability. degeneration is becoming commonplace. However, even when the fuel filler pipe is made of resin, a metal retainer is usually used in order to prevent damage due to contact with the fuel gun at the fuel filler port into which the fuel gun is inserted.

On the other hand, resin fuel filler pipes are generally made of non-conductive resin material, so they cannot ground the static electricity that builds up on the metal retainer. It is necessary to prevent gasoline from igniting due to sparks caused by static electricity.

Therefore, as shown in FIG. 4, a resin fuel filler pipe 1 connected to a fuel tank for mounting on an automobile has a large-diameter fuel filler port 11 and a taper 121 at the lower end of the fuel filler port 11 with a smaller diameter downward. is provided, and a diameter-reduced pipe portion 13 is provided below the taper 121 . In the fuel filler port 11, the upper half of the metal retainer 14 is inserted into the inner periphery of the conductive ring 15, and the flange 122 of the conductive ring 15 and the downward protruding piece 123 hanging down from the inner periphery of the conductive ring 122 are electrically conductive. It is joined to the upper edge of the fuel filler port 11 by an adhesive or by heating, and a narrow conductive resin piece 124 is provided on the outer side of the upper part of the fuel filler port 11 to the upper end in the vertical direction. By connecting the flange 122 of the ring 15, the base end of the metal retainer 14 is grounded, and the static electricity charged in the metal retainer 14 is grounded. (See Patent Document 1)

By the way, in the structure of FIG. 4, when the vehicle is hit from behind, there is a risk that the filler port 11 and the conductive ring 15 will be disassembled by the impact force, resulting in fuel leakage. FIG. 5 shows a metal retainer 14 at the end opposite to the fuel tank of the fuel filler pipe 1 extending from the fuel tank and attached to the fuel tank, which suppresses destruction due to a vehicle collision or the like. A conductive resin layer 125 fixed to the outer peripheral surface, a cylindrical protective body 126 fixed to the outer peripheral surface of the conductive resin layer 125, and a tip opening edge 127 extending from the end face of the cylindrical protective body 126 and the outer peripheral surface following this. and a part of the conductive resin layer 125 penetrates through the through hole 128 provided in the cylindrical protective body 126, and the outer surface of the cylindrical protective body 126 One end of the ground wire 130 is attached to the protrusion 129 by forming the protrusion 129 protruding from the outside. Then, in order to realize the above structure, the cylindrical protective body 126 is fitted to the metal retainer 14, and the O-ring 131 is pressed under pressure, and the gap between the metal retainer 14 and the cylindrical protective body 126 is used as a cavity for injection. A conductive resin layer 125 is formed by molding. (See Patent Document 2)

On the other hand, as shown in FIG. 6, the protector 132 that protects the periphery of the filler port has a main body 133 having a cylindrical shape, and a vehicle-exterior flange 134 and a vehicle-interior flange 135 formed at both ends. It is arranged on the inner opening peripheral edge 138 of the filler base 137 of the vehicle body via an elastic material 136 made of foamed sponge rubber or the like having a function and a cushioning function, and the vehicle inner flange 135 of the protector 132 is attached to the wheel house outer panel 139. A bolt 142 is secured to the portion 140 via a washer-like sealing member 141 . Although the fuel filler pipe 1 is disclosed in FIG. 6, the material thereof is not mentioned. (See Patent Document 3)

Japanese Utility Model No. 3-59583 JP-A-9-68126 JP-A-60-1026

By the way, in the case of automobiles, it is important to reduce exhaust gas by reducing weight, but from the viewpoint of environmental problems, recycling must also be fully considered. According to the structure of Patent Document 2, although it is certainly possible to deal with collisions from the rear regarding safety, between the metal retainer 14 and the fuel filler pipe 1, a cylindrical protective body 126 and a conductive resin layer are provided. Since 125 is interposed, the metal retainer 14 cannot be removed from the fuel filler pipe 1 later. Therefore, there was a problem in recyclability.

Further, according to the structure of Patent Document 3, it is possible to separate the fuel filler pipe 1 and the protector 132, but mounting and removing the protector 132 requires bolting and unbolting at multiple locations. There was a problem with workability.

In order to solve the above problems, the present invention of claim 1 provides a fuel filler pipe having a large-diameter fuel filler port, a diameter-reduced pipe portion, and a stepped portion connecting the fuel filler port and the diameter-reduced pipe portion, A fuel filler pipe peripheral structure having a cylindrical protective cover covering the side surface of the fuel filler pipe, wherein the protective cover can be attached from the upper end of the fuel filler pipe, and the fuel filler pipe of the protective cover On the stepped portion side of the stepped portion, a claw portion protruding toward the stepped portion is provided to prevent the protective cover from coming off from the upper end of the filler port when the protective cover is attached to the filler port. is formed so as to protrude from the stepped portion, and is provided with a slope portion extending from the vicinity of the lower end of the fuel filler port of the stepped portion to the same height as the outer peripheral surface of the lower end of the fuel filler port portion, and the claw portion of the protective cover is attached to the fuel filler. The fuel filler port peripheral structure is characterized in that the protective cover can be removed from the fuel filler port by moving on the slope portion of the stepped portion of the pipe, and the protective cover is detachable.

In the first aspect of the present invention, a fuel filler pipe having a large-diameter fuel filler port, a diameter-reduced pipe portion, and a stepped portion connecting the fuel filler port and the diameter-reduced pipe portion, and a fuel filler pipe portion of the fuel filler pipe. The protective cover can be attached from the upper end of the fuel filler port, and the protective cover has a claw portion on the stepped portion side. When the protective cover is attached from the upper end of the filler port, the protective cover can be fixed to the filler port and can be prevented from coming off from the upper end of the filler port.

In addition, since the claw portion is provided with a slope portion reaching the same height as the lower end of the fuel filler port near the stepped portion on the fuel filler port side, the claw portion of the protective cover can be adjusted by rotating the protective cover. However, the protective cover can be removed and reused when it moves on the slope of the step and reaches the same height as the lower end of the filler port.

According to the second aspect of the present invention, the slope portion provided at the stepped portion includes a convex arc-shaped or substantially straight-line inclined portion and a same-height portion as the outer peripheral surface of the lower end of the fuel filler port. It is a structure around a fuel filler opening. In the second aspect of the present invention, since the slope portion provided at the stepped portion has a convex arc-shaped or substantially linear inclined portion, by rotating the protective cover, the claw portion of the protective cover The convex arc-shaped slope can be gradually raised, and a constant load can guide the claws of the protective cover to the same height as the outer peripheral surface of the lower end of the fuel filler port, improving workability. do.

In addition, since the slope portion has the same height portion as the outer peripheral surface of the lower end of the fuel filler port, the protective cover is rotated so that the claw portion of the protective cover is flush with the outer peripheral surface of the lower end of the fuel filler port. It can be lifted up to the height position, and the protective cover can be reliably removed.

According to the third aspect of the present invention, the protruding length h of the claw portion of the protective cover toward the stepped portion is smaller than the height H of the slope provided at the stepped portion of the fuel filler pipe. According to the third aspect of the present invention, since the length h of the claw portion of the protective cover protruding toward the stepped portion is smaller than the height H of the slope provided at the stepped portion of the fuel filler pipe, the protective cover is rotated. Sometimes, the claws of the protective cover can move on the sloped part without coming off the sloped part, and the protective cover can be removed when it reaches the same height as the outer peripheral surface of the lower end of the fuel filler port. can be done.

According to a fourth aspect of the present invention, there is provided a fuel filler opening peripheral structure in which a side surface of the protective cover is provided with a protrusion that abuts against a side surface of the fuel filler pipe of the fuel filler pipe. In the fourth aspect of the present invention, since the side surface of the protective cover is provided with a protrusion that contacts the side surface of the fuel filler port, the attached protective cover is firmly fixed to the side surface of the fuel filler port by the protrusion. It is possible to prevent the occurrence of abnormal noise due to contact between the protective cover and the oil filler port due to vibration or the like.

According to the present invention of claim 5, the length L protruding downward from the lower end of the fuel filler port at the same height of the slope provided at the stepped portion of the fuel filler pipe is determined by attaching a protective cover to the fuel filler pipe. Sometimes, it is a structure around the fuel filling port in which the claw portion of the protective cover protrudes downward from the fuel filling port portion of the fuel filler pipe longer than the length l.

According to the fifth aspect of the present invention, the length L protruding downward from the lower end of the fuel filler opening at the same height of the slope portion provided in the stepped portion is such that when the protective cover is attached to the fuel filler opening, the Since the claw portion of the cover is longer than the downward projecting length l from the fuel filler port, the claw portion of the protective cover can reliably move on the slope portion of the stepped portion.

According to the sixth aspect of the present invention, the length W of the same height portion provided at the stepped portion of the fuel filler pipe is longer than the width w of the claw portion of the protective cover. In the sixth aspect of the present invention, the length W of the same height portion provided at the stepped portion of the fuel filler pipe is longer than the width w of the claw portion of the protective cover. can be raised to the same height as the outer peripheral surface of the lower end of the filler port, and the protective cover can be reliably removed. In particular, when the side surface of the protective cover is provided with a protrusion that abuts against the side surface of the fuel filler port, a relatively strong force is required to rotate the protective cover. If the length of the same-height portion is short, there is a possibility that depending on the degree of force, the pawl portion will pass through the same-height portion after going up the slope portion, making it impossible to remove the protective cover. Therefore, by having the same height portion longer than the width of the claw portion, the protective cover can be reliably removed.

According to a seventh aspect of the present invention, there is provided a fuel filler opening peripheral structure in which a side surface on the front side of the vehicle is notched when the protective cover is attached to the fuel filler opening. The present invention is directed to rear collision resistance. In the seventh aspect of the present invention, the side surface of the protective cover on the front side of the vehicle when the fuel filler pipe is attached is notched, so that the weight of the protective cover can be reduced while maintaining the rear collision resistance performance. can be done. In addition, since the notch makes it easy to grasp the orientation of the protective cover when attaching it, workability is improved.

According to an eighth aspect of the present invention, there is provided a fuel filler opening peripheral structure in which a trumpet-shaped expanded tube portion is provided at the upper end of the protective cover on the side opposite to the side where the claw portion is provided. In the eighth aspect of the present invention, since the trumpet-shaped expanded tube portion is provided at the upper end of the protective cover opposite to the side where the claw portion is provided, when the protective cover is attached and detached, the trumpet-shaped expanded tube portion can be held by hand, and workability is improved.

The present invention provides a fuel filler pipe having a large-diameter fuel filler port, a diameter-reduced pipe portion, and a stepped portion connecting the fuel filler port and the diameter-reduced pipe portion, and covering a side surface of the fuel filler pipe. The protective cover can be attached from the upper end of the fuel filler opening, and the stepped portion of the protective cover has a protective cover that is attached to the fuel filler port to the stepped portion. A claw portion for preventing the protective cover from coming off is provided, and the stepped portion has a slope portion extending from the vicinity of the lower end of the fuel filler port formed by projecting from the stepped portion to the same height as the lower end of the fuel filler port. is provided, when the protective cover is attached from the upper end of the filler port, the protective cover can be fixed to the filler port and the protective cover can be prevented from coming off from the upper end of the filler port. can. Furthermore, by rotating the protective cover, the protective cover can be removed when the claw portion of the protective cover moves on the slope portion of the stepped portion and reaches the same height as the outer peripheral surface of the lower end of the fuel filler port. can.

Further, since the slope portion provided at the stepped portion has a convex arc-shaped or substantially straight-line inclined portion and a same-height portion as the outer peripheral surface of the lower end of the fuel filler port, The claw portion of the protective cover can gradually rise up the convex arc-shaped slope portion, and the claw portion of the protective cover can be reliably raised to the same height as the lower end of the fuel filler port, The protective cover can be reliably removed.

Furthermore, the length h by which the claw portion of the protective cover protrudes from the fuel filler pipe toward the stepped portion, the height H of the slope portion provided at the stepped portion of the fuel filler pipe, and the protective cover attached to the filler port of the fuel filler pipe. When the claw portion of the protective cover protrudes downward from the fuel filler pipe, it protrudes downward from the lower end of the fuel filler port at the same height as the slope provided at the stepped portion of the fuel filler pipe. The relationship between the length L, the width w of the claw portion, and the length W of the same height portion provided at the stepped portion of the fuel filler pipe is h<H, l<L, and w<W. Therefore, the claw of the protective cover can be guided to the slope provided on the stepped part of the fuel filler pipe, and the entire claw of the protective cover can be reliably raised to the same height as the lower end of the fuel filler pipe. , the protective cover can be removed.

FIG. 4 is a diagram showing the relationship between a protective cover and a fuel filler pipe in the structure around the fuel filler opening of the first embodiment of the present invention, where (a) is a side view of the protective cover, (b) is a side view of the fuel filler pipe; (c) is a sectional view taken along line AA of (b), and (d) is a sectional view taken along line BB of (b). FIG. 1 (a) is a view when the protective cover is attached to (b) the fuel filler pipe of the fuel filler pipe, (a) is a side view, and (b) is a view from the diameter reduction pipe side of the fuel filler pipe. It is a bottom view. Fig. 2 shows a protective cover used in a fuel filler port peripheral structure of a second embodiment of the present invention, (a) is a top view, (b) is a side view of (a) viewed from the direction B , and (c) is ( (a) is a side view seen from direction A , (d) is a cross-sectional view along CC in (c), and (e) is a cross-sectional view along DD in (b). FIG. 10 is a cross-sectional view showing a structure around a fuel filler port in a conventional structure around a fuel filler port using a resin fuel filler pipe. (Patent Document 1) FIG. 10 is a cross-sectional view showing a structure around a fuel filler port in a conventional structure around a fuel filler port using a resin fuel filler pipe. (Patent document 2) FIG. 10 is a cross-sectional view of a conventional fuel filler port peripheral structure; (Patent document 3)

First, the relationship between the protective cover 2 and the fuel filler pipe 1 in the fuel filler port peripheral structure of the first embodiment of the present invention will be described with reference to FIGS. 1 and 2, and then the fuel filler of the second embodiment. The protective cover 2 used for the structure around the mouth will be described with reference to FIG. The fuel filler pipe 1 used in the fuel filler port peripheral structure of the second embodiment is the same as the fuel filler pipe 1 used in the first embodiment. Also, the same parts as those shown in the conventional example are denoted by the same reference numerals.

As shown in FIG. 1(a), the protective cover 2 that protects the filler port 11 of the fuel filler pipe 1 has a cylindrical shape and is made of stainless steel. The material may be other materials such as other metals such as iron, or may be coated by electrodeposition. The protective cover 2 used in the first embodiment is of a type that protects the entire periphery of the filler port 11 of the fuel filler pipe 1 . A claw portion 21 having a width w and a length l is provided on the lower portion of the protective cover 2 . A protrusion 22 is provided on the side surface of the protective cover 2 so as to protrude inward from the cylindrical protective cover 2 and abut on the side surface of the fuel filler pipe 11 of the fuel filler pipe 1 . Further, a trumpet-shaped expanded tube portion 23 is provided at the upper end of the protective cover 2 opposite to the side where the claw portion 21 is provided.

As shown in FIG. 1B, the fuel filler pipe 1 includes a large-diameter fuel filler port 11, a diameter-reduced pipe portion 13, and a stepped portion 12 connecting the fuel filler port 11 and the diameter-reduced pipe portion 13. and they are made of resin, for example molded from high density polyethylene. A metal retainer 14 is incorporated in the fuel filler opening 11 , and a conductive ring 15 is incorporated between the fuel filler opening 11 and the metal retainer 14 for grounding static electricity charged on the metal retainer 14 . As for the path from the conductive ring 15 for grounding the static electricity to the body (not shown), for example, Patent Document 1 described in Background Art can be used. A resin retainer may also be used. In this case, there is no problem of static electricity, so the conductive ring 15 is not required.

The stepped portion 12 is formed with a slope portion 16 extending from the vicinity of the lower end of the fuel filler port portion 11 protruding from the stepped portion 12 to the same height as the lower end of the fuel filler port portion 11 . The slope portion 16 has the same height as the inclined portion 17 (FIG. 1(c)) and the outer peripheral surface of the lower end of the fuel filler port portion 11, and has the same height portion 18 (FIG. 1(d)) having a length of W. have. Further, the length of protrusion of the same height portion 18 downward from the lower end of the fuel filler port portion 11 is L. As shown in FIG.

Here, the length L of the slope portion 16 provided on the stepped portion 12 of the fuel filler pipe 1 downward from the filler port portion 11, the length W of the same height portion 18, and the claw portion 21 provided on the protective cover 2 The relationship between the length l and the width w of is L>l and W>w. Regarding the length l of the claw portion 21, when the protective cover 2 is attached from the filler port 11 side of the fuel filler pipe 1, the lower end of the protective cover 2 exceeds the lower end of the filler port 11. (The amount by which the lower end of the protective cover 2 exceeds the lower end of the filler port 11 is x) must satisfy L>(l+x).

As shown in FIG. 2( a ), when the protective cover 2 is attached from the filler port 11 side of the fuel filler pipe 1 , the protective cover 2 is fixed to the filler port 11 of the fuel filler pipe 1 by the claws 21 . , to prevent it from coming off upward in the figure. Moreover, the protection cover 2 is fixed to the fuel filler pipe 1 of the fuel filler pipe 1 by the protrusion 22 coming into contact with the side surface of the fuel filler pipe 1 of the fuel filler pipe 1 .

FIG. 2(b) is a bottom view of the fuel filler pipe 1 as seen from the reduced diameter pipe portion 13 side. In addition, description of the protrusion 22 of the protective cover 2 is abbreviate|omitted in FIG.2(b). Here, the relationship between the length h of the claw portion 21 of the protective cover 2 protruding toward the stepped portion 12 of the fuel filler pipe 1 and the height H of the slope portion 16 provided on the stepped portion 12 is H>h. be. From this state, when the protective cover 2 is rotated clockwise in FIG. Further clockwise rotation causes the claw portion 21 to climb up the inclined portion 17 and eventually reach the same height portion 18 as the lower end of the fuel filler port portion 11 . Then, by W>w, the entire claw portion 21 is positioned at the same height portion 18 . From this state, when the protective cover 2 is pulled upward (backward in the figure), the claw portion 21 can move from the same height portion 18 of the stepped portion 12 to the outer peripheral surface of the lower end of the filler port portion 11 . Therefore, the protective cover 2 can be removed from the filler port 11 of the fuel filler pipe 1 .

FIG. 3 shows a protective cover 2 used in a fuel filler port peripheral structure according to a second embodiment of the present invention. c) is a side view seen from direction A in (a). (d) is a CC cross-sectional view in (c), and mainly relates to the protrusion 22. FIG. (e) is a cross-sectional view taken along line DD in (b), and mainly relates to the claw portion 21. FIG. On the other hand, as for the fuel filler pipe 1, the same one as shown in FIGS. 1 and 2 can be used. The arrow direction of A in (a) is the front of the vehicle.

In this embodiment, the protective cover 2 is composed of two members, a fuel filler fixing portion 24 and a fuel filler rear collision protection portion 25, and the filler filler fixing portion 24 and the fuel filler rear collision protection portion 25 are integrated by spot welding. ing. The inner diameters of the filler port fixing portion 24 and the filler port rear impact protection portion 25 (excluding the protrusion 22) are the same. A trumpet-shaped expanded tube portion 23 is formed on the upper portion of the fuel filler port fixing portion 24 . Note that spot welds are omitted. An alignment mark 28 is stamped or printed on the flared tube portion 23 . The material of both the filler port fixing portion 24 and the filler port rear impact protection portion 25 is stainless steel. The fuel filler port rear impact protection portion 25 is positioned at the rear of the vehicle body when the protective cover 2 is attached to the fuel filler port 11 of the fuel filler pipe 1, and protects the fuel filler port 11 of the fuel filler pipe 1 in the event of a rear collision. Protect. The material may be other materials such as other metals such as iron, or may be coated by electrodeposition.

The fuel filler port rear collision protection portion 25 is partially provided in the range of α with respect to the entire circumference (360°) of the fuel filler port fixing portion 24, and further, the fuel filler port fixing portion center 26 and the trumpet-shaped expanded tube portion center 27 are separated. It is fixed by welding with a displacement of β with respect to the knot-extended line. As a result, the rear collision protection portion 25 of the protective cover 2 has a notched side surface. As a result, the protective cover 2 can be provided in a necessary range in a necessary position, so that the weight can be reduced while maintaining the rear collision resistance performance of the protective cover 2 . It should be noted that the angles α and β can be appropriately changed depending on the type of vehicle, etc., in the sense that the protective cover 2 is provided at the required position and within the required range.

The claw portion 21 is formed at the lower end of the filler neck rear collision protection portion 25 , and the protrusion 22 is formed at both the filler neck fixing portion 24 and the filler neck rear collision protection portion 25 . As a result, in this embodiment, when the protective cover 2 is attached, the filler port 11 of the fuel filler pipe 1 reaches the flared tube portion 23 unlike the first embodiment shown in FIG. 2(a). is doing. Note that the protrusion 22 may be formed only on the fuel filler port rear collision protection portion 25 .

As is clear from FIG. 3(b), the claw portion 21 is formed at the lower end portion of the fuel filler port rear collision protection portion 25 of the protective cover 2. As shown in FIG. 3(e), the left side of the claw portion 21 is the fuel filler pipe 1 side of the fuel filler pipe 1. As shown in FIG. The claw portion 21 once bulges outward from the lower end portion of the fuel filler rear collision protection portion 25, then crosses the inner surface of the fuel filler rear collision protection portion 25 and is bent to the fuel filler pipe 11 side of the fuel filler pipe 1, and again. , the rear collision protection portion 25 of the fuel filler pipe 1 is bent outwardly, although it is located on the side of the fuel filler pipe 11 . This is to allow the protective cover 2 to be attached to and detached from the filler opening 11 of the fuel filler pipe 1, and to prevent the protective cover 2 from coming off upward from the filler opening 11 of the fuel filler pipe 1 when it is attached. is.

Further, the corners and side surfaces of the tip portion of the claw portion 21 are chamfered. This is because when the protective cover 2 is removed from the filler port 11 of the fuel filler pipe 1, the protective cover 2 is rotated to make it easier for the slope portion 16 provided at the stepped portion 12 of the fuel filler pipe 1 to rise. be.

As is clear from FIG. 3(d), the protrusion 22 is formed on the fuel filler port fixing portion 24 and the fuel filler port rear collision protection portion 25, is bent toward the fuel filler port portion 11 side of the fuel filler pipe 1, and then refuels. It is formed so that it is parallel to the port fixing portion 24 and the fuel filler port rear collision protection portion 25, or the tip thereof faces slightly outward. When the protective cover 2 is attached, the protective cover 2 is brought into contact with and fixed to the fuel filler pipe 11 of the fuel filler pipe 1 by the projection 22, and the protective cover 2 is attached to the fuel filler pipe 1 of the fuel filler pipe 1. This is for enabling detachment. In FIG. 3, four portions (three of them are on a straight line) are formed. If the fixing force of the protective cover 2 to the fuel filler port 11 is within a prescribed range, it can be changed as appropriate.

Further, it is desirable that the side surface of the protrusion 22 on the side of the filler port 11 of the fuel filler pipe 1 has a chamfered corner. Since the protective cover 2 is removed from the filler opening 11 of the fuel filler pipe 1, the protrusion 22 can easily move on the side surface of the filler opening 11 of the fuel filler pipe 1 when the protective cover 2 is rotated. It's for.

When attaching the protective cover 2 to the filler port 11 of the fuel filler pipe 1, the claw portion 21 is aligned with the outer shape of the filler port 11 of the fuel filler pipe 1 with reference to the alignment mark 28 of the flared tube portion 23. and put it on. Since the claw portion 21 has the above-described shape, it moves along the outer peripheral surface of the fuel filler opening 11, and when it passes over the lower end of the fuel filler opening 11, the protruding portion becomes the inner side surface of the fuel filler rear collision protection portion 25. By returning further inside, the protective cover 2 can be fixed to the filler opening 11 of the fuel filler pipe 1 and the protective cover 2 can be prevented from slipping out from the upper end of the filler opening 11 .

On the other hand, when the protective cover 2 is removed, the protective cover 2 is rotated in the same manner as described in FIG. After coming into contact, it climbs up the inclined portion 17 and eventually reaches the same height portion 18 as the outer peripheral surface of the lower end of the fuel filler port portion 11 . Then, by W>w, the entire claw portion 21 is positioned at the same height portion 18 . From this state, when the protective cover 2 is pulled upward, the claw portion 21 can move from the same height portion 18 of the stepped portion 12 to the outer peripheral surface of the lower end of the fuel filler port portion 11. It can be removed from the filler port 11 of the pipe 1 .

The implementation of the present invention is not limited to the above embodiments, and various modifications are possible without departing from the object of the present invention.

For example, in the same-height portion 18 , a convex portion may be provided at the end portion opposite to the inclined portion 17 . The convex portion serves as a stopper to prevent the claw portion 21 of the protective cover 2 from passing through the same height portion 18 and the protective cover 2 to be removed, when the protective cover 2 is removed. In this case, the convex portion may have a constant width (length y in the circumferential direction), or may be in the shape of a dot such as a hemisphere (length y in the circumferential direction). Note that the relationship between the length W of the same height portion 18 and the width w of the claw portion 21 of the protective cover 2 when the projection is provided is (Wy)>w.

For example, in the present embodiment, the stepped portion 12 of the fuel filler pipe 1 is provided at a position substantially perpendicular to the fuel filler port 11, but the lower end of the large diameter fuel filler port 11 has a smaller diameter downward. It may have a taper, and the reduced diameter pipe portion 13 may be provided below the taper. In this case, the inclined portion 17 of the slope portion 16 does not have a constant width as shown in FIGS. .

For example, in the present embodiment, the slope portion 16 protruding from the stepped portion 12 of the fuel filler pipe 1 is not in contact with the outer peripheral surface of the diameter-reduced pipe 13, but the height H of the slope portion 16 is equal to that of the diameter-reduced pipe. It may be enlarged until it touches the outer peripheral surface of 13 . In this case, there is an advantage that the strength of the slope portion 6 is increased. However, there is also a demerit that the weight of the slope portion 6 increases.

1 Fuel filler pipe 2 Protective cover 11 Fuel filler port 12 Stepped portion 13 Diameter reduction pipe portion 14 Metal retainer 15 Conductive ring 16 Slope portion 17 Inclined portion 18 Same height portion 21 Claw portion 22 Protruding portion 23 Flare-shaped expanded pipe portion 24 Oil supply Port fixing part 25 Oil filler port rear collision protection part 26 Oil filler part fixing center 27 Flare-shaped tube expansion part center 28 Alignment mark

Claims (8)

A fuel filler pipe having a large-diameter fuel filler port, a diameter-reduced pipe portion, and a stepped portion connecting the fuel filler port and the diameter-reduced pipe portion, and covering a side surface of the fuel filler pipe of the fuel filler pipe. A fuel filler port peripheral structure having a cylindrical protective cover,
The protective cover can be attached from the upper end of the fuel filler port,
The protective cover is provided on the stepped portion side of the fuel filler pipe for preventing the protective cover from coming off from the upper end of the fuel filler port when the protective cover is attached to the fuel filler port. A claw portion protruding toward the stepped portion is provided,
The stepped portion is provided with a slope portion that protrudes from the stepped portion and extends from the vicinity of the lower end of the fuel filler port of the stepped portion to the same height as the outer peripheral surface of the lower end of the fuel filler port,
By moving the claw portion of the protective cover on the slope portion of the stepped portion of the fuel filler pipe, the protective cover can be removed from the fuel filler port, and the protective cover can be attached and detached. A structure around a fuel filler opening, characterized in that 2. The slope portion provided at the stepped portion has a convex arc-shaped or substantially linear inclined portion and a same-height portion as the outer peripheral surface of the lower end of the fuel filler port. The structure around the fuel filler port described. 3. The protruding length h of the claw portion of the protective cover toward the step portion is smaller than the height H of the slope portion provided at the step portion of the fuel filler pipe. Structure around the fuel filler port. 4. The fuel filler opening peripheral structure according to claim 1, wherein a side surface of said protective cover is provided with a protrusion that contacts a side surface of said fuel filler pipe of said fuel filler pipe. The length L protruding downward from the lower end of the fuel filler port at the same height of the slope portion provided at the stepped portion of the fuel filler pipe is such that the protective cover extends from the fuel filler pipe to the fuel filler pipe. 3. The fuel filler opening peripheral structure according to claim 2, wherein the claw portion of the protective cover is longer than a length l of downward projection from the fuel filler port portion when the protective cover is attached to the fuel filler portion. 6. The fuel filler port peripheral structure according to claim 2 or 5, wherein the length W of the same height portion provided at the stepped portion of the fuel filler pipe is longer than the width w of the claw portion of the protective cover. . 7. The fuel filler port peripheral structure according to claim 1, wherein a side surface of the protective cover on the front side of the vehicle when the fuel filler port portion is attached is notched. 8. The fuel filler port peripheral structure according to claim 1, wherein a trumpet-shaped expanded tube portion is provided at the upper end of the protective cover opposite to the side where the claw portion is provided.

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