WO2021006009A1

WO2021006009A1 - Lid for fuel tank

Info

Publication number: WO2021006009A1
Application number: PCT/JP2020/024112
Authority: WO
Inventors: 和貴 ▲高▼橋; 祐一真鍋
Original assignee: 愛三工業株式会社
Priority date: 2019-07-08
Filing date: 2020-06-19
Publication date: 2021-01-14
Also published as: JP7286447B2; JP2021011851A

Abstract

This lid (100) for a fuel tank comprises: a lid member (22) that closes an opening part of the fuel tank; and a connection column (52) that is connected to the lid member (22) to be movable in the vertical direction. The lid member (22) has a hanging tube part (35) extending in the vertical direction. The connection column (52) has a tubular column part (87) that extends in the vertical direction and is inserted into the hanging tube part (35) to be movable in the axial direction. The tubular column part (87) is connected to the hanging tube part (35) by a suspension snap fit (110) to be movable in the axial direction and suspendible. The suspension snap fit (110) is configured by: an engagement protrusion (120) provided in the tubular column part (87); and an elastic engagement piece (114) having an engagement claw part that extends axially from the hanging tube part (35) in a cantilever shape and can engage with the engagement protrusion (120).

Description

Fuel tank lid

This disclosure relates to a fuel tank lid.

For example, Japanese Patent Application Laid-Open No. 2007-77972 discloses a kind of conventional fuel tank lid. The lid includes a lid member that closes the opening of the fuel tank and a connecting member that is movably connected to the lid member in the vertical direction. The lid member has a columnar portion extending in the vertical direction. The connecting member has a tubular portion that extends in the vertical direction and is inserted into the tubular portion so as to be movable in the axial direction. By engaging the protrusion of the elastic engaging piece provided on the columnar portion and the slot provided on the tubular portion, the tubular portion is connected to the columnar portion so as to be movable in the vertical direction and suspended. There is.

According to Japanese Patent Application Laid-Open No. 2007-77972, when a large downward load is applied to the connecting member when the lid member is vigorously lifted, a tensile load acts on the elastic engaging piece to cause elastic engagement. The piece is likely to be elastically deformed in the direction of disengagement of the protrusion with respect to the slot, and in severe cases, the connecting member may fall off.

The purpose of the present disclosure is to prevent the connecting member from falling off when the lid member is vigorously lifted.

In one aspect of the present disclosure, the fuel tank lid includes a lid member that closes the opening of the fuel tank and a connecting member that is movably connected to the lid member in the vertical direction. The lid member has a tubular portion extending in the vertical direction, and the connecting member has a columnar portion extending in the vertical direction and movably inserted into the tubular portion in the axial direction. The columnar portion is connected to the tubular portion so as to be movable in the axial direction and to be suspended by the suspension snap fit, and the suspension snap fit is connected to the tubular portion and the suspension. An elastic engagement portion having an engaging portion provided on any one member of the columnar portion and an engaged portion extending in the other member in a cantilever shape in the axial direction and engaging with the engaging portion. It is composed of a pair of pieces, and when the columnar portion is suspended from the tubular portion, a compressive load acts on the elastic engaging piece due to the engagement between the engaging portion and the engaged portion. It is configured to do.

According to the above aspect, when the connecting member is suspended from the lid member, a compressive load acts on the elastic engaging piece due to the engagement between the engaging portion and the engaged portion, so that the elastic engaging piece is engaged. Elastic deformation in the release direction can be suppressed. Therefore, when the lid member is vigorously lifted, even when a large downward load is applied to the connecting member, it is possible to suppress the disengagement of the suspension snap fit. Therefore, it is intended to prevent the connecting member from falling off when the lid member is vigorously lifted.

It is a rear view of the fuel supply device which concerns on Embodiment 1. FIG. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. It is sectional drawing of a pump unit. It is an exploded view of the fuel supply device of FIG. It is a partial cross-sectional view of the snap-fit structure for suspension. It is a rear view which shows the lid for a fuel tank in a suspended state of a connecting member. It is sectional drawing which shows the snap fit for suspension. It is sectional drawing which shows the snap fit for suspension concerning Embodiment 2. FIG.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[Embodiment 1]
The fuel tank lid according to the first embodiment is used in a fuel supply device. The fuel supply device is installed in a fuel tank mounted on a vehicle such as an automobile equipped with an engine, which is an internal combustion engine, and supplies fuel in the fuel tank to the engine. FIG. 1 is a rear view showing a fuel supply device, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, FIG. 3 is a sectional view showing a pump unit, and FIG. 4 is an exploded view of a lid member and a pump unit. It is a perspective view. The orientation of the fuel supply system is determined as indicated by the arrows in each figure. The vertical direction corresponds to the direction of gravity when mounted on the fuel tank of the vehicle, the so-called top-bottom direction. Moreover, the front-back and left-right directions are not specified.

(Fuel tank)
As shown in FIG. 1, the fuel tank 10 is formed in the shape of a hollow container having an upper wall portion 11 and a bottom wall portion 12. The fuel tank 10 is made of resin and is deformed by a change in the internal pressure of the tank, that is, it expands and contracts mainly in the vertical direction. A circular hole-shaped opening 13 is formed in the upper wall portion 11. Gasoline as a liquid fuel, for example, is stored in the fuel tank 10.

(Overview of fuel supply system)
As shown in FIG. 1, the fuel supply device 20 includes a lid member 22 and a pump unit 24 (see FIG. 4).

(Lid member 22)
As shown in FIG. 2, the lid plate portion 26, which is the main body of the lid member 22, is formed in a disk shape. Short cylindrical fitting cylinders 27 are concentrically formed on the lower surface of the lid plate 26. An annular plate-shaped flange portion 28 is formed on the outer peripheral portion of the lid plate portion 26 so as to project outward in the radial direction from the fitting cylinder portion 27. The lid member 22 is made of, for example, a resin made of polyacetal resin (POM).

As shown in FIG. 4, the lid plate portion 26 is provided with a fuel discharge port 30 and an electric connector portion 32. The fuel discharge port 30 is formed in a tubular shape that penetrates the lid plate portion 26 in the vertical direction. The upper end of the fuel discharge port 30 is bent rearward. The fuel discharge port 30 is used for connecting the fuel pipes inside and outside the fuel tank 10. Further, the electric connector portion 32 is used for connecting the electric wiring inside and outside the fuel tank 10.

A standoff portion 34 is formed on the lower surface of the rear portion of the lid plate portion 26. The standoff portion 34 has a hanging cylinder portion 35 and both left and right curved wall portions 36. The hanging tubular portion 35 is formed in a tubular shape extending downward from the lid plate portion 26 (see FIG. 2). In rear view, both curved wall portions 36 are formed in a substantially triangular shape that converges downward from the fitting cylinder portion 27 (see FIG. 1). Both curved wall portions 36 are formed symmetrically on both side portions of the hanging cylinder portion 35.

(Pump unit 24)
As shown in FIG. 3, the pump unit 24 includes a sub tank 38, a fuel pump 40, and a pressure regulator 42.

The sub tank 38 includes a sub tank main body 46, a lower cover 48, and a fuel filter 50. The sub-tank main body 46 has a tank forming portion 54, a pump case portion 55, a fuel passage portion 56, and a branch passage portion 57. The sub tank main body 46 is made of, for example, a resin made of polyacetal resin (POM).

The tank forming portion 54 is formed in a celestial cylindrical shape. The pump case portion 55 is formed in a celestial cylindrical shape on the upper surface portion of the tank forming portion 54. The vertical intermediate portion of the pump case portion 55 is connected to the upper surface portion of the tank forming portion 54.

The fuel passage portion 56 is formed in a straight tubular shape extending horizontally on the upper surface portion of the pump case portion 55. The fuel passage portion 56 has an inlet 56a at one end and an outlet 56b at the other end. The entrance 56a is opened downward. The outlet 56b of the fuel passage portion 56 and the lower end portion of the fuel discharge port 30 are connected via a flexible pipe member 62 such as a flexible tube and a rubber hose (see FIG. 1).

The branch passage portion 57 is formed in a tubular shape extending downward from the fuel passage portion 56. The vertical intermediate portion of the branch passage portion 57 is connected to the upper surface portion of the tank forming portion 54. In the branch passage portion 57, a regulator case portion 58 that opens downward is formed in a portion below the upper surface portion of the tank forming portion 54.

The lower cover 48 is formed in a circular shallow dish shape having a lattice plate-shaped bottom plate portion 66. The lower cover 48 is attached to the tank forming portion 54 by a snap fit so as to cover the lower surface opening thereof. The lower cover 48 is made of resin.

The fuel filter 50 has a filter member 68 and a connecting member 72. The filter member 68, which is the main body of the fuel filter 50, is formed in a hollow bag shape by a filter medium made of a non-woven fabric made of resin. The outer shape of the filter member 68 is formed in a substantially disk shape. Inside the filter member 68, an internal bone member that secures the internal volume of the filter member 68 is arranged. The connecting member 72 is arranged on the upper surface of the filter member 68. The connecting member 72 is connected to the internal bone member so as to communicate with the inside and outside of the filter member 68. The connecting member 72 and the internal bone member are made of resin.

The filter member 68 is arranged substantially horizontally so as to close the lower surface of the tank forming portion 54 prior to attaching the lower cover 48 to the tank forming portion 54. The connecting member 72 is attached to the lower end of the pump case portion 55 by a snap fit. By attaching the lower cover 48 to the sub tank main body 46, the peripheral edge portion of the filter member 68 is sandwiched between the sub tank main body 46 and the lower cover 48 in a sealed state.

A fuel storage space 74 surrounded by both

members

46 and 50 is formed between the sub tank main body 46 and the fuel filter 50. Fuel is stored in the fuel storage space 74. The fuel stored in the fuel storage space 74 includes the fuel in the fuel tank 10 flowing in from the opening of the sub tank main body 46 and the fuel discharged from the pressure regulator 42.

The fuel pump 40 is composed of a substantially columnar electric fuel pump. The fuel pump 40 is inserted into the pump case portion 55 from below prior to the attachment of the connecting member 72 of the fuel filter 50 to the pump case portion 55. Along with this, the fuel discharge port 40a of the fuel pump 40 is connected to the inlet 56a of the fuel passage portion 56. Further, by attaching the connecting member 72 to the pump case portion 55, the fuel pump 40 is vertically housed and held in the pump case portion 55. As a result, the fuel pump 40 is arranged inside the sub tank main body 46. Further, the internal space of the filter member 68 is communicated with the fuel suction port of the fuel pump 40 via the connecting member 72.

The fuel pump 40 sucks fuel through the filter member 68, pressurizes the fuel, and then discharges the fuel from the fuel discharge port 40a into the fuel passage portion 56. The filter member 68 filters the fuel sucked into the fuel pump 40. The electric connector of the fuel pump 40 and the electric connector portion 32 of the lid member 22 are electrically connected via electrical wiring.

The pressure regulator 42 is housed in the regulator case portion 58. A resin cap 43 for preventing the pressure regulator 42 from coming off is attached to the regulator case portion 58 by snap-fitting. The pressure regulator 42 adjusts the pressure in the fuel passage portion 56 to a predetermined pressure, and discharges the surplus fuel from the surplus fuel discharge port 42a. The pressurized fuel discharged from the surplus fuel discharge port 42a is discharged to the fuel storage space 74 through the opening hole 43a provided in the cap 43.

As shown in FIG. 4, a support column mounting portion 59 is formed on the rear side portion of the upper end portion of the tank forming portion 54 of the sub tank main body 46. A connecting strut 52 is vertically attached to the strut mounting portion 59. The connecting column 52 has a tubular column portion 87 formed in a hollow tubular shape. The cylinder pillar portion 87 is formed in a bottomed square cylinder shape having a predetermined height. A pedestal portion 83 having a large outer shape is formed at the lower end portion of the cylinder pillar portion 87. By attaching the pedestal portion 83 to the column mounting portion 59 of the sub tank main body 46, the tubular column portion 87 is supported in an upright shape. The connecting column 52 is made of, for example, a resin made of a polyamide resin (PA66 + GF33) mixed with glass fibers. The connecting column 52 corresponds to the "connecting member" referred to in the present disclosure.

As shown in FIG. 2, the cylinder pillar portion 87 is inserted into the hanging cylinder portion 35 of the lid member 22 so as to be movable in the axial direction, that is, in the vertical direction. The cylinder pillar portion 87 is connected to the hanging cylinder portion 35 by a suspension snap fit 110 so as to be movable in the axial direction and to be suspended. As a result, the pump unit 24 is connected to the lid member 22 so as to be movable in the vertical direction and suspended. The suspension snap fit 110 will be described later.

The connecting mechanism 53 is composed of the hanging cylinder portion 35 of the lid member 22 and the cylinder pillar portion 87 of the connecting column 52. The hanging tubular portion 35 corresponds to the “cylindrical portion” referred to in the present disclosure. Further, the cylinder pillar portion 87 corresponds to the “columnar portion” referred to in the present disclosure.

A metal coil spring 85 is arranged in the internal space formed by the hanging cylinder portion 35 and the cylinder pillar portion 87. The coil spring 85 urges the lid member 22 and the sub tank main body 46 in the opposite direction, that is, in the separating direction.

(Installation of fuel supply device 20)
When the fuel supply device 20 is installed in the fuel tank 10, the fuel supply device 20 is in an extended state, that is, a state in which the pump unit 24 is suspended from the lid member 22. In this state, the lid member 22 and the pump unit 24 are separated from each other. Subsequently, the pump unit 24 is inserted through the opening 13 of the fuel tank 10 and placed on the bottom wall portion 12 of the fuel tank 10.

Subsequently, the lid member 22 is pushed down against the urging force of the coil spring 85, and the flange portion 28 is fixed to the upper wall portion 11 of the fuel tank 10 via fixing means such as fixing brackets and bolts. At this time, the fitting cylinder portion 27 of the lid member 22 is fitted in the opening 13. By closing the opening 13 of the fuel tank 10 with the lid member 22 as described above, the installation of the fuel supply device 20 is completed (see FIGS. 1 and 2).

In the installed state of the fuel supply device 20, the lower cover 48 is held in a state of being pressed against the bottom wall portion 12 of the fuel tank 10 by the urging force of the coil spring 85. Further, a fuel supply pipe connected to the engine is connected to the fuel discharge port 30 of the lid member 22. Further, an external connector connected to a power supply, an ECU, or the like is connected to the electric connector unit 32.

(Operation of fuel supply device 20)
The fuel pump 40 is driven by driving power from the outside. Then, the fuel in the fuel tank 10 and / or the fuel in the fuel storage space 74 of the sub tank 38 is sucked into the fuel pump 40 through the fuel filter 50 and pressurized. The pressurized fuel discharged from the fuel pump 40 into the fuel passage portion 56 of the sub tank main body 46 flows through the fuel passage portion 56 and then is supplied to the engine from the fuel discharge port 30 of the lid member 22 via the pipe member 62. To. Further, the pressurized fuel flowing through the fuel passage portion 56 is regulated by flowing to the pressure regulator 42 via the branch passage portion 57.

Further, the fuel tank 10 is deformed, that is, expanded and contracted due to a change in internal pressure due to a change in temperature, a change in the amount of fuel, or the like. As a result, the distance between the upper wall portion 11 and the bottom wall portion 12 of the fuel tank 10 changes (increases or decreases). Along with this, the lid member 22 and the pump unit 24 relatively move in the vertical direction to follow the change in the height of the fuel tank 10.

Further, when the fuel tank 10 is about to contract excessively, the standoff portion 34 of the lid member 22 comes into contact with the pedestal portion 83 of the connecting column 52 of the pump unit 24 and acts as a tension rod. As a result, the distance between the lid member 22 and the pump unit 24 is restricted to the minimum distance.

(Fuel tank lid)
In the fuel supply device 20, the lid member 22, the connecting column 52, and the coil spring 85 constitute the fuel tank lid 100 (see FIG. 1). FIG. 6 is a rear view showing the fuel tank lid in a suspended state of the connecting member. In FIG. 6, the connecting column 52 is suspended from the lid member 22. As shown in FIG. 6, the tubular column portion 87 of the connecting column 52 is connected to the hanging tubular portion 35 of the lid member 22 so as to be movable in the axial direction and so as to be suspended by the suspension snap fit 110. ..

(Snap fit 110 for suspension)
FIG. 5 is a perspective view showing a partially broken peripheral portion of the suspension snap fit, and FIG. 7 is a cross-sectional view showing the suspension snap fit. As shown in FIG. 5, a long hole-shaped opening hole 112 extending in the vertical direction is formed in the rear side wall 35a of the hanging cylinder portion 35 of the lid member 22 (see FIG. 2). A projecting piece-shaped elastic engaging piece 114 extending upward is formed at the center of the lower end of the opening hole 112 in the left-right direction. The elastic engaging piece 114 extends in a cantilever shape in the axial direction of the hanging cylinder portion 35. A portion of the rear side wall 35a of the hanging cylinder portion 35 that supports the lower end portion of the elastic engaging piece 114 in a cantilever shape is referred to as a support portion 35b.

The elastic engagement piece 114 is formed so as to be elastically deformable in the front-rear direction (see the alternate long and short dash line 114 in FIG. 7). An engaging claw portion 114a projects from the front side of the elastic engaging piece 114. The wall thickness of the elastic engaging piece 114 including the engaging claw portion 114a in the front-rear direction is gradually increased from the bottom to the top. The upper surface 114b of the elastic engagement piece 114 is an inclined surface that inclines upward from the rear to the front. The engaging claw portion 114a corresponds to the "engaged portion" referred to in the present disclosure. The upper surface 114b corresponds to the "engaged surface" referred to in the present disclosure.

An engaging protrusion 120 projects from the upper end of the rear surface of the rear side wall 87a of the cylinder pillar portion 87 of the connecting column 52. The wall thickness of the engaging protrusion 120 in the front-rear direction gradually increases from the top to the bottom. The lower surface 120a of the engaging projection 120 is an inclined surface that inclines downward from the front to the rear. The engaging protrusion 120 corresponds to the "engaging portion" referred to in the present disclosure. The lower surface 120a corresponds to the "engaging surface" referred to in the present disclosure.

When the tubular column portion 87 is inserted into the hanging tubular portion 35 from below, the engaging projection 120 interferes with the engaging claw portion 114a of the elastic engaging piece 114, so that the elastic engaging piece 114 is elastically deformed ( It gets over the engaging claw portion 114a by utilizing the bending deformation). As a result, the engaging projection 120 is movably engaged with the engaging claw portion 114a of the elastic engaging piece 114 in the vertical direction (see FIGS. 1 and 6). Further, the support portion 35b of the hanging cylinder portion 35 is arranged below the engaging projection 120 (see FIG. 7).

In this state, when the cylinder pillar portion 87 is suspended from the hanging cylinder portion 35, the cylinder pillar portion 87 comes off due to the engagement protrusion 120 coming into contact with the engagement claw portion 114a of the elastic engaging piece 114. It is stopped (see FIG. 7). The elastic engagement piece 114 and the engagement protrusion 120 constitute a suspension snap fit 110.

(Advantage of Embodiment 1)
According to the fuel tank lid 100 described above, when the connecting column 52 is suspended from the lid member 22, a compressive load acts on the elastic engaging piece 114 due to the engagement between the engaging projection 120 and the engaging claw portion 114a. As a result, elastic deformation of the elastic engaging piece 114 in the disengagement direction can be suppressed. Specifically, as shown in FIG. 7, the engaging projection 120 is provided on the cylinder pillar portion 87, the elastic engaging piece 114 is provided on the hanging cylinder portion 35, and the support portion 35b of the hanging cylinder portion 35 is provided. It is arranged below the engagement protrusion 120. Therefore, when the engaging projection 120 and the engaging claw portion 114a are engaged when the connecting column 52 is suspended from the lid member 22, the tubular column portion 87 is elastic when a load F for pulling downward is applied. A compressive load F1 acts on the engaging piece 114. As a result, the elastic engaging piece 114 is urged in the direction (forward) of engaging the engaging claw portion 114a with the engaging projection 120. Therefore, elastic deformation of the elastic engagement piece 114 in the disengagement direction (rearward) can be suppressed.

Therefore, even when a large downward load is applied to the connecting column 52 when the lid member 22 is vigorously lifted, it is possible to suppress the disengagement of the suspension snap fit 110. Therefore, the purpose is to prevent the connecting column 52 from falling off when the lid member 22 is vigorously lifted.

Further, the lower surface 120a of the engaging protrusion 120 and the upper surface 114b of the engaging claw portion 114a facing the lower surface 120a are inclined surfaces that incline upward from the hanging cylinder portion 35 side toward the cylinder pillar portion 87 side. Has been done. Therefore, the elastic deformation of the elastic engagement piece 114 in the disengagement direction (rearward) can be effectively suppressed.

[Embodiment 2]
Since the second embodiment is a modification of the suspension snap-fit 110 (see FIG. 7) of the first embodiment, the changed portion will be described, and the same parts as those of the first embodiment are designated by the same reference numerals. The duplicate description will be omitted. FIG. 8 is a cross-sectional view showing a snap fit for suspension.

As shown in FIG. 8, in the second embodiment, the engaging projection 220 adjacent to the lower end of the opening hole 112 protrudes from the front surface of the rear side wall 35a of the hanging cylinder portion 35. The wall thickness of the engaging protrusion 220 in the front-rear direction gradually increases from the bottom to the top. The upper surface 220a of the engaging projection 220 is an inclined surface that inclines upward from the rear to the front. The engaging protrusion 220 corresponds to the "engaging portion" referred to in the present disclosure. The upper surface 220a corresponds to the "engaging surface" referred to in the present disclosure.

A long hole-shaped opening hole 213 extending in the vertical direction is formed at the upper end of the rear side wall 87a of the tubular column portion 87 of the connecting column 52. A projecting piece-shaped elastic engaging piece 214 extending downward is formed at the center of the upper end of the opening hole 213 in the left-right direction. The elastic engaging piece 214 extends in a cantilever shape in the axial direction of the hanging cylinder portion 35. A portion of the rear side wall 87a of the tubular column portion 87 that cantileverly supports the upper end portion of the elastic engaging piece 214 is referred to as a support portion 87b.

The elastic engagement piece 214 is formed so as to be elastically deformable in the front-rear direction (see the two-dot chain line 214 in FIG. 8). An engaging claw portion 214a projects from the rear side of the elastic engaging piece 214. The wall thickness of the elastic engaging piece 214 including the engaging claw portion 214a in the front-rear direction is gradually increased from the top to the bottom. The lower surface 214b of the engaging claw portion 214a is an inclined surface that inclines downward from the front to the rear. The engaging claw portion 214a corresponds to the "engaged portion" referred to in the present disclosure. The lower surface 214b corresponds to the "engaged surface" referred to in the present disclosure.

When the tubular column portion 87 is inserted into the hanging tubular portion 35 from below, the engaging projection 220 interferes with the engaging claw portion 214a of the elastic engaging piece 214, so that the elastic engaging piece 214 is elastically deformed ( It gets over the engaging claw portion 214a by utilizing the bending deformation). As a result, the engaging claw portion 214a of the elastic engaging piece 214 is engaged with the engaging projection 220 so as to be movable in the vertical direction. The elastic engaging piece 214 has an engaging claw portion 214a that extends in a cantilever shape in the axial direction and is capable of engaging with the engaging projection 220 at the tip portion.

In this state, when the cylinder pillar portion 87 is suspended from the hanging cylinder portion 35, the cylinder pillar portion 87 comes off due to the engagement claw portion 214a of the elastic engaging piece 214 coming into contact with the engagement protrusion 220. It will be stopped. At this time, a compressive load acts on the elastic engaging piece 214. The elastic engaging piece 214 and the engaging projection 220 form a suspension snap fit 210 having a structure in which the tubular column portion 87 is connected to the hanging tubular portion 35 so as to be movable in the vertical direction and suspended. There is.

The same action / effect as that of the first embodiment can be obtained by the second embodiment. Further, the engaging protrusion 220 is provided on the hanging cylinder portion 35, the elastic engaging piece 214 is provided on the cylinder pillar portion 87, and the support portion 87b of the cylinder pillar portion 87 is above the engaging protrusion 220. Have been placed. Therefore, a compressive load acts on the elastic engaging piece 214 due to the engagement between the engaging projection 220 and the engaging claw portion 214a when the connecting column 52 is suspended from the lid member 22.

[Other Embodiments]
Although the embodiments of the present disclosure have been described above, they can be implemented in various other embodiments. For example, the fuel tank lid of the present disclosure is not limited to the fuel supply device 20 of a vehicle such as an automobile, and may be applied to the fuel tank lid of other fuel supply devices.

In this disclosure, the technology was disclosed in various ways. The first aspect is a fuel tank lid including a lid member that closes an opening of the fuel tank and a connecting member that is movably connected to the lid member in the vertical direction. The connecting member has a tubular portion extending in the vertical direction, and the connecting member has a columnar portion extending in the vertical direction and movably inserted into the tubular portion in the axial direction. The columnar portion is connected to the tubular portion so as to be movable in the axial direction and suspendable by a snap fit for suspension, and the snap fit for suspension is either the tubular portion or the columnar portion. By an engaging portion provided on one member and an elastic engaging portion having an engaged portion extending in the axial direction of the other member in a cantilever manner and engaging with the engaging portion. When the columnar portion is suspended from the tubular portion, a compressive load acts on the elastic engaging piece due to the engagement between the engaging portion and the engaged portion. It is a lid for a fuel tank.

According to the first aspect, when the connecting member is suspended from the lid member, a compressive load acts on the elastic engaging piece due to the engagement between the engaging portion and the engaged portion, so that the elastic engaging piece Elastic deformation in the disengagement direction can be suppressed. Therefore, when the lid member is vigorously lifted, even when a large downward load is applied to the connecting member, it is possible to suppress the disengagement of the suspension snap fit. Therefore, it is intended to prevent the connecting member from falling off when the lid member is vigorously lifted.

The second aspect is the fuel tank lid of the first aspect, wherein the engaging portion is provided on the columnar portion, and the elastic engaging piece is provided on the tubular portion. The support portion of the tubular portion that supports the elastic engaging piece in a cantilever shape is a fuel tank lid that is arranged below the engaging portion.

According to the second aspect, a compressive load acts on the elastic engaging piece due to the engagement between the engaging portion and the engaged portion when the connecting member is suspended from the lid member.

The third aspect is the fuel tank lid of the first aspect, wherein the engaging portion is provided in the tubular portion, and the elastic engaging piece is provided in the columnar portion. The support portion of the columnar portion that supports the elastic engaging piece in a cantilever shape is a fuel tank lid that is arranged above the engaging portion.

According to the third aspect, a compressive load acts on the elastic engaging piece due to the engagement between the engaging portion and the engaged portion when the connecting member is suspended from the lid member.

A fourth aspect is the fuel tank lid according to any one of the first to third aspects, wherein the engaging surface of the engaging portion and the engaged portion facing the engaging surface are engaged. The mating surface is a lid for a fuel tank, which is an inclined surface that inclines upward from the tubular portion side toward the columnar portion side.

According to the fourth aspect, elastic deformation of the elastic engaging piece in the disengagement direction can be effectively suppressed.

Claims

A lid member that closes the opening of the fuel tank,
A connecting member that is movably connected to the lid member in the vertical direction,
It is a lid for a fuel tank equipped with
The lid member has a tubular portion extending in the vertical direction.
The connecting member has a columnar portion that extends in the vertical direction and is inserted into the tubular portion so as to be movable in the axial direction.
The columnar portion is connected to the tubular portion by a snap fit for suspension so as to be movable in the axial direction and suspendable.
The suspension snap fit is cantilevered in the axial direction of an engaging portion provided on one of the tubular portion and the columnar portion and the other member, and the engaging portion is provided. It is composed of an elastic engaging piece having an engaged portion that can be engaged with the portion.
A lid for a fuel tank in which a compressive load acts on the elastic engaging piece by engaging the engaging portion with the engaged portion when the columnar portion is suspended from the tubular portion.
The fuel tank lid according to claim 1.
The engaging portion is provided on the columnar portion, and the engaging portion is provided on the columnar portion.
The elastic engagement piece is provided on the tubular portion and is provided on the tubular portion.
A fuel tank lid in which the support portion of the tubular portion that supports the elastic engaging piece in a cantilever shape is arranged below the engaging portion.
The fuel tank lid according to claim 1.
The engaging portion is provided on the tubular portion, and the engaging portion is provided on the tubular portion.
The elastic engagement piece is provided on the columnar portion and is provided on the columnar portion.
The support portion of the columnar portion that supports the elastic engaging piece in a cantilever shape is a lid for a fuel tank, which is arranged above the engaging portion.
The fuel tank lid according to any one of claims 1 to 3.
The engaging surface of the engaging portion and the engaged surface of the engaged portion facing the engaging surface are inclined surfaces that incline upward from the tubular portion side toward the columnar portion side. The lid for the fuel tank.