JP7286447B2 - fuel tank lid - Google Patents

Description

The technology disclosed in this specification relates to a fuel tank lid.

Conventionally, there is a fuel tank lid disclosed in, for example, Patent Document 1. The fuel tank lid includes a lid member that closes the opening of the fuel tank, and a connecting member that is connected to the lid member so as to be vertically movable. The lid member has a columnar portion extending in the vertical direction. The connecting member has a tubular portion that extends vertically and is inserted into the tubular portion so as to be axially movable. By engaging the projection of the elastic engagement piece provided on the column with the slot provided on the tube, the tube is connected to the column so as to be vertically movable and suspended. there is

JP 2007-77972 A

According to Patent Document 1, when the lid member is vigorously lifted and a large downward load is applied to the connecting member, a tensile load acts on the elastic engagement piece, causing the elastic engagement piece to move against the slot. The projection is likely to be elastically deformed in the disengagement direction, and in extreme cases, the connecting member may fall off.

An object of the technology disclosed in the present specification is to prevent the connecting member from falling off when the lid member is vigorously lifted.

The technology disclosed in this specification takes the following measures.

A first means is a fuel tank lid comprising a lid member that closes an opening of a fuel tank, and a connecting member that is connected to the lid member so as to be vertically movable, the lid member comprising: The connecting member has a vertically extending cylindrical portion, and the connecting member has a columnar portion extending vertically and inserted into the cylindrical portion so as to be axially movable. The cylindrical portion is connected to the cylindrical portion by a suspension snap fit so as to be axially movable and suspended, and the suspension snap fit is either the cylindrical portion or the column portion. An engaging portion provided on one member and an elastic engaging piece having an engaged portion extending in the axial direction of the other member in a cantilevered manner and capable of being engaged with the engaging portion and when the columnar portion is suspended from the cylindrical 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 means, when the connecting member is suspended from the cover member, the engagement between the engaging portion and the engaged portion applies a compressive load to the elastic engaging piece, thereby causing the elastic engaging piece to move. Elastic deformation in the disengagement direction can be suppressed. Therefore, even when a large downward load is applied to the connecting member when the lid member is vigorously lifted, disengagement of the suspension snap fit can be suppressed. Therefore, the object is to prevent the connecting member from coming off when the lid member is vigorously lifted.

A second means is the fuel tank lid of the first means, wherein the engaging portion is provided on the columnar portion, the elastic engaging piece is provided on the cylindrical portion, and the A support portion of the cylindrical portion that supports the elastic engagement piece in a cantilever manner is a fuel tank lid that is arranged below the engagement portion.

According to the second means, 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 third means is the fuel tank lid of the first means, wherein the engaging portion is provided on the tubular portion, the elastic engaging piece is provided on the columnar portion, and the A supporting portion of the columnar portion that supports the elastic engaging piece in a cantilever manner is a fuel tank lid that is arranged above the engaging portion.

According to the third means, 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 fourth means is the fuel tank lid of any one of the first to third means, wherein the engaging surface of the engaging portion and the engaged portion of the engaged portion facing the engaging surface are engaged. The mating surface is a fuel tank lid that is an inclined surface that is inclined upward from the tubular portion side toward the columnar portion side.

According to the fourth means, it is possible to effectively suppress the elastic deformation of the elastic engaging piece in the disengagement direction.

According to the technique disclosed in this specification, it is possible to prevent the connecting member from falling off when the lid member is vigorously lifted.

2 is a rear view showing the fuel supply device according to Embodiment 1; FIG. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1; It is a sectional view showing a pump unit. It is a perspective view which explodes and shows a cover member and a pump unit. FIG. 4 is a perspective view showing a partially cutaway peripheral portion of the suspension snap fit. FIG. 4 is a rear view showing the fuel tank lid in a suspended state of the connecting member; FIG. 4 is a cross-sectional view showing a suspension snap fit; FIG. 5 is a cross-sectional view showing a suspension snap fit according to a second embodiment;

Hereinafter, embodiments for implementing the technology disclosed in this specification will be described with reference to the drawings.

[Embodiment 1]
A fuel tank lid according to this embodiment is used in a fuel supply device. 2. Description of the Related Art A fuel supply system is installed in a fuel tank mounted in 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. 1 is a rear view showing the fuel supply device, FIG. 2 is a cross-sectional view taken along line II--II in FIG. 1, FIG. 3 is a cross-sectional view showing the pump unit, and FIG. 4 is an exploded view showing the cover member and the 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 gravitational direction, that is, the vertical direction when mounted in the fuel tank of the vehicle. Further, the front, rear, left, and 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 a top wall portion 11 and a bottom wall portion 12 . The fuel tank 10 is made of resin and deforms, that is, expands and contracts mainly in the vertical direction due to changes in tank internal pressure. A circular hole-shaped opening 13 is formed in the upper wall portion 11 . For example, gasoline as liquid fuel is stored in the fuel tank 10 .

(Overview of fuel supply device)
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 disc shape. A short cylindrical fitting tube portion 27 is concentrically formed on the lower surface of the cover plate portion 26 . An annular plate-shaped flange portion 28 is formed on the outer peripheral portion of the cover plate portion 26 so as to protrude radially outward from the fitting cylinder portion 27 . The lid member 22 is made of resin such as polyacetal resin (POM).

As shown in FIG. 4 , the cover plate portion 26 is provided with a fuel discharge port 30 and an electrical connector portion 32 . The fuel discharge port 30 is formed in a tubular shape vertically penetrating the cover plate portion 26 . The upper end of the fuel discharge port 30 is bent rearward. The fuel discharge port 30 is used for connecting fuel pipes inside and outside the fuel tank 10 . The electrical connector portion 32 is used to connect electrical wiring inside and outside the fuel tank 10 .

A standoff portion 34 is formed on the lower surface of the rear portion of the cover plate portion 26 . The standoff portion 34 has a hanging tubular 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 cover plate portion 26 (see FIG. 2). When viewed from the rear, both curved wall portions 36 are formed in a substantially triangular shape that converges downward from the fitting tube portion 27 (see FIG. 1). Both curved wall portions 36 are formed symmetrically on both sides of the hanging tubular 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 has a sub-tank 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 resin such as polyacetal resin (POM).

The tank forming portion 54 is formed in a hollow cylindrical shape. The pump case portion 55 is formed in the upper surface portion of the tank forming portion 54 in a hollow cylindrical shape. A vertically intermediate portion of the pump case portion 55 is connected to an upper surface portion of the tank forming portion 54 .

The fuel passage portion 56 is formed in the shape of a straight pipe 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 inlet 56a is open downward. The outlet 56b of the fuel passage portion 56 and the lower end of the fuel discharge port 30 are connected via a flexible tubular member 62 such as a flexible tube or rubber hose (see FIG. 1).

The branch passage portion 57 is formed in a tubular shape extending downward from the fuel passage portion 56 . A vertically 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 opening downward is formed below the upper surface portion of the tank forming portion 54. As shown in FIG.

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

Fuel filter 50 has a filter member 68 and a connecting member 72 . A filter member 68, which is the main body of the fuel filter 50, is formed in a hollow bag shape from a filter material made of resin nonwoven fabric. The outer shape of the filter member 68 is formed in a substantially disc shape. Disposed within the filter member 68 is an internal bone member that secures an interior volume of the filter member 68 . The connection member 72 is arranged on the top surface of the filter member 68 . The connecting member 72 is coupled with the inner bone member so as to communicate the inside and outside of the filter member 68 . The connecting member 72 and the inner 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 before the lower cover 48 is attached to the tank forming portion 54 . The connecting member 72 is attached to the lower end portion of the pump case portion 55 by snap fitting. By attaching the lower cover 48 to the sub-tank main body 46, the peripheral edge 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 body 46 and the fuel discharged from the pressure regulator 42 .

The fuel pump 40 is a substantially cylindrical electric fuel pump. The fuel pump 40 is inserted into the pump case portion 55 from below before the connection member 72 of the fuel filter 50 is attached to the pump case portion 55 . Along with this, the fuel discharge port 40 a of the fuel pump 40 is connected to the inlet 56 a of the fuel passage portion 56 . By attaching the connection member 72 to the pump case portion 55 , the fuel pump 40 is accommodated and held in the pump case portion 55 in a vertical position. Accordingly, the fuel pump 40 is arranged inside the sub-tank main body 46 . Further, the internal space of the filter member 68 communicates with the fuel suction port of the fuel pump 40 via the connection member 72 .

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

The pressure regulator 42 is housed within the regulator case portion 58 . A cap 43 made of resin that prevents 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 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.

As shown in FIG. 4 , a post attachment 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 . The connection strut 52 is vertically attached to the strut mounting portion 59 . The connection strut 52 has a tubular column portion 87 formed in a hollow tubular shape. The cylindrical column portion 87 is formed in the shape of a bottomed rectangular cylinder having a predetermined height. A pedestal portion 83 that enlarges the outer shape is formed at the lower end portion of the cylindrical column portion 87 . By attaching the pedestal portion 83 to the column attachment portion 59 of the sub-tank main body 46, the cylindrical column portion 87 is vertically supported. The connecting strut 52 is made of resin such as polyamide resin (PA66+GF33) mixed with glass fiber. The connecting strut 52 corresponds to the "connecting member" referred to in this specification.

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

A connection mechanism 53 is configured by the hanging cylinder portion 35 of the lid member 22 and the cylinder column portion 87 of the connection strut 52 . The hanging tubular portion 35 corresponds to the "tubular portion" referred to in this specification. Further, the cylindrical columnar portion 87 corresponds to the “columnar portion” referred to in this specification.

A metallic coil spring 85 is arranged in the internal space formed by the hanging tubular portion 35 and the tubular column portion 87 . The coil spring 85 urges the lid member 22 and the sub-tank main body 46 in opposite directions, that is, in the separation direction.

(Installation of fuel supply device 20)
When the fuel supply device 20 is installed in the fuel tank 10 , the pump unit 24 is suspended from the lid member 22 in an extended state. In this state, the lid member 22 and the pump unit 24 are in the farthest state. Subsequently, the pump unit 24 is inserted through the opening 13 of the fuel tank 10 and placed on the bottom wall 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 metal fittings and bolts. At this time, the fitting cylinder portion 27 of the lid member 22 is fitted into the opening portion 13 . By closing the opening 13 of the fuel tank 10 with the cover 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 biasing force of the coil spring 85 . A fuel supply pipe leading to the engine is connected to the fuel discharge port 30 of the lid member 22 . An external connector connected to a power source, an ECU, etc. is connected to the electrical connector portion 32 .

(Operation of fuel supply device 20)
The fuel pump 40 is driven by drive 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 via 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 body 46 flows through the fuel passage portion 56, passes through the pipe member 62, and is supplied to the engine from the fuel discharge port 30 of the lid member 22. be. Also, the pressure of the pressurized fuel flowing through the fuel passage portion 56 is adjusted by flowing to the pressure regulator 42 via the branch passage portion 57 .

Further, the fuel tank 10 deforms, that is, expands and contracts due to changes in internal pressure due to changes in temperature, changes in the amount of fuel, and the like. As a result, the distance between the top 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 follow the change in height of the fuel tank 10 by relatively moving in the vertical direction.

Further, when the fuel tank 10 is about to contract excessively, the stand-off portion 34 of the lid member 22 abuts against the base portion 83 of the connection strut 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 regulated to the minimum distance.

(Fuel tank lid)
In the fuel supply device 20, the lid member 22, the connecting strut 52, and the coil spring 85 constitute a 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. FIG. 6 shows a state in which the connecting strut 52 is suspended from the lid member 22 . As shown in FIG. 6, the cylindrical column portion 87 of the connection strut 52 is connected to the hanging cylindrical portion 35 of the lid member 22 by a snap fit 110 for axial movement and suspension. .

(Suspension snap fit 110)
FIG. 5 is a perspective view showing a partially broken peripheral portion of the suspension snap fit, and FIG. 7 is a sectional view showing the suspension snap fit. As shown in FIG. 5, the rear wall 35a of the hanging tubular portion 35 of the lid member 22 is formed with an elongated opening 112 extending in the vertical direction (see FIG. 2). An elastic engagement piece 114 extending upward is formed in the center of the lower end of the opening 112 in the left-right direction. The elastic engagement piece 114 extends in the axial direction of the hanging tubular portion 35 in a cantilevered manner. A portion of the rear side wall 35a of the hanging tube portion 35 that supports the lower end portion of the elastic engagement piece 114 in a cantilever manner is referred to as a support portion 35b.

The elastic engaging piece 114 is formed so as to be elastically deformable in the front-rear direction (see two-dot chain line 114 in FIG. 7). An engaging claw portion 114 a protrudes from the front side of the elastic engaging piece 114 . The thickness in the front-rear direction of the elastic engaging piece 114 including the engaging claw portion 114a gradually increases from the bottom to the top. The upper surface 114b of the elastic engaging piece 114 is formed as an inclined surface that slopes upward from the rear toward the front. The engaging claw portion 114a corresponds to the "engaged portion" in this specification. The upper surface 114b corresponds to the "engaged surface" in this specification.

An engaging projection 120 protrudes from the upper end of the rear surface of the rear side wall 87a of the cylindrical column portion 87 of the connecting post 52. As shown in FIG. The thickness of the engaging protrusion 120 in the front-rear direction gradually increases from the top to the bottom. A lower surface 120a of the engaging projection 120 is an inclined surface that slopes downward from the front to the rear. The engaging protrusion 120 corresponds to the "engaging portion" referred to in this specification. The lower surface 120a corresponds to the "engagement surface" referred to in this specification.

When the cylindrical column portion 87 is inserted into the hanging cylindrical portion 35 from below, the engaging protrusion 120 interferes with the engaging claw portion 114a of the elastic engaging piece 114, thereby elastically deforming the elastic engaging piece 114 ( flexural deformation) to get over the engaging claw portion 114a. As a result, the engaging projection 120 is engaged with the engaging claw portion 114a of the elastic engaging piece 114 so as to be vertically movable (see FIGS. 1 and 6). Further, the supporting portion 35b of the hanging tube portion 35 is arranged below the engaging projection 120 (see FIG. 7).

In this state, when the cylindrical column portion 87 is suspended from the hanging cylindrical portion 35, the engaging projection 120 abuts against the engaging claw portion 114a of the elastic engaging piece 114, thereby causing the cylindrical column portion 87 to come off. It is stopped (see FIG. 7). The elastic engaging piece 114 and the engaging projection 120 constitute the suspension snap fit 110 .

(Advantages of this embodiment)
According to the fuel tank lid 100 described above, when the connecting strut 52 is suspended from the lid member 22, a compressive load acts on the elastic engagement piece 114 due to the engagement between the engagement projection 120 and the engagement claw portion 114a. As a result, elastic deformation of the elastic engaging piece 114 in the disengagement direction can be suppressed. More specifically, as shown in FIG. 7, an engagement projection 120 is provided on the cylindrical column portion 87, an elastic engagement piece 114 is provided on the hanging tube portion 35, and a support portion 35b of the hanging tube portion 35 is It is arranged below the engaging projection 120 . Therefore, when the connecting post 52 is suspended from the cover member 22, the engagement between the engaging projection 120 and the engaging claw portion 114a causes an elastic load F to be applied to the cylinder portion 87 to pull it downward. A compressive load F1 acts on the engaging piece 114 . As a result, the elastic engaging piece 114 is urged in the direction (forward) in which the engaging claw portion 114 a engages the engaging projection 120 . Therefore, it is possible to suppress elastic deformation of the elastic engaging piece 114 in the disengagement direction (backward).

Therefore, even if a large downward load is applied to the connecting strut 52 when the lid member 22 is vigorously lifted, disengagement of the suspension snap fit 110 can be suppressed. Therefore, it is intended to prevent the connection struts 52 from coming off when the lid member 22 is forcefully lifted.

In addition, the lower surface 120a of the engaging projection 120 and the upper surface 114b of the engaging claw portion 114a facing the lower surface 120a form an inclined surface that slopes upward from the hanging tubular portion 35 side toward the tubular column portion 87 side. It is Therefore, it is possible to effectively suppress the elastic deformation of the elastic engagement piece 114 in the disengagement direction (backward).

[Embodiment 2]
Since the present embodiment is obtained by modifying the suspension snap fit 110 (see FIG. 7) of the first embodiment, the modified portions will be described, and the same parts as those of the first embodiment will be given the same reference numerals. We omit redundant explanations. FIG. 8 is a sectional view showing a suspension snap fit.

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

An elongated opening 213 extending in the vertical direction is formed in the upper end portion of the rear wall 87a of the cylindrical column portion 87 of the connecting post 52 . An elastic engaging piece 214 extending downward is formed in the center of the upper end of the opening 213 in the left-right direction. The elastic engaging piece 214 extends in the axial direction of the hanging tubular portion 35 in a cantilevered manner. A portion of the rear wall 87a of the cylindrical column portion 87 that supports the upper end portion of the elastic engagement piece 214 in a cantilever manner is called a support portion 87b.

The elastic engaging piece 214 is formed so as to be elastically deformable in the front-rear direction (see chain double-dashed line 214 in FIG. 8). An engaging claw portion 214 a projects from the rear side of the elastic engaging piece 214 . The thickness in the front-rear direction of the elastic engaging piece 214 including the engaging claw portion 214a gradually increases from top to bottom. A lower surface 214b of the engaging claw portion 214a is an inclined surface that slopes downward from the front to the rear. The engaging claw portion 214a corresponds to the "engaged portion" in this specification. The lower surface 214b corresponds to the "engaged surface" in this specification.

When the cylindrical column portion 87 is inserted into the hanging cylindrical portion 35 from below, the engaging projection 220 interferes with the engaging claw portion 214a of the elastic engaging piece 214, thereby elastically deforming the elastic engaging piece 214 ( flexural deformation) to get over the engaging claw portion 214a. As a result, the engaging claw portion 214a of the elastic engaging piece 214 is engaged with the engaging protrusion 220 so as to be vertically movable. The elastic engaging piece 214 extends in the axial direction in a cantilevered manner and has an engaging claw portion 214 a that can be engaged with the engaging projection 220 at the tip.

In this state, when the cylindrical column portion 87 is suspended from the hanging cylindrical portion 35, the engaging claw portion 214a of the elastic engaging piece 214 abuts against the engaging projection 220, thereby causing the cylindrical column portion 87 to come off. be stopped. At this time, a compressive load acts on the elastic engagement piece 214 . The elastic engaging pieces 214 and the engaging projections 220 form a suspension snap fit 210 that connects the cylindrical column portion 87 to the hanging cylindrical portion 35 so as to be movable in the vertical direction and to be suspended. there is

This embodiment also provides the same functions and effects as those of the first embodiment. An engaging projection 220 is provided on the hanging tube portion 35, an elastic engaging piece 214 is provided on the cylindrical column portion 87, and the supporting portion 87b of the cylindrical column portion 87 is positioned above the engaging protrusion 220. are 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 214 a when the connecting post 52 is suspended from the cover member 22 .

[Other embodiments]
The embodiments of the technology disclosed in this specification have been described above, but the technology can be implemented in various other forms. For example, the fuel tank lid of the technology disclosed in this specification is not limited to the fuel supply device 20 of a vehicle such as an automobile, and may be applied to fuel tank lids of other fuel supply devices.

10 Fuel tank 13 Opening 22 Lid member 35 Drooping cylindrical portion (cylindrical portion)
35b Supporting portion 52 Connecting strut (connecting member)
87 Cylindrical part (columnar part)
87b support portion 100 fuel tank lid 110 suspension snap fit 114 elastic engaging piece 114a engaging claw portion (engaged portion)
114b upper surface (engaged surface)
120 engagement protrusion (engagement portion)
120a Lower surface (engagement surface)
210 Suspension snap fit 220 Engagement projection (engagement portion)
220a upper surface (engagement surface)
214 elastic engaging piece 214a engaging claw portion (engaged portion)
214b upper surface (engaged surface)

Claims (4)

a lid member that closes the opening of the fuel tank;
a connecting member connected to the lid member so as to be vertically movable;
A fuel tank lid comprising:
The lid member has a tubular portion extending in the vertical direction,
The connecting member has a columnar portion that extends vertically and is inserted into the cylindrical portion so as to be axially movable,
The columnar portion is connected to the cylindrical portion by a snap fit for suspension so as to be axially movable and suspendable,
The suspension snap fit includes an engaging portion provided on one of the cylindrical portion and the columnar portion, and a cantilevered portion extending in the axial direction of the other member and engaged with the engaging portion. and an elastic engaging piece having an engaged portion that can be engaged with the portion,
The elastic engaging piece is configured to be elastically deformed in an engagement releasing direction by contacting the engaging portion when the columnar portion is inserted into the tubular portion,
when the columnar portion moves upward with respect to the tubular portion, the engaging portion and the elastic engaging piece are separated from each other;
When the columnar portion moves downward and is suspended from the cylindrical portion, a compressive load acts on the elastic engaging piece due to the engagement between the engaging portion and the engaged portion. This suppresses elastic deformation of the elastic engagement piece in the direction of disengagement ,
The engaging surface of the engaging portion and the engaged surface of the engaged portion facing the engaging surface are inclined surfaces that are inclined upward from the cylindrical portion side toward the columnar portion side. A fuel tank lid . The fuel tank lid according to claim 1,
the side wall of the tubular portion has an axially extending aperture,
The fuel tank lid, wherein the elastic engaging piece or the engaging portion provided on the tubular portion extends in the axial direction within the opening hole. The fuel tank lid according to claim 1 or 2,
The engaging portion is provided on the columnar portion,
The elastic engagement piece is provided on the tubular portion,
A fuel tank lid, wherein a supporting portion of the cylindrical portion that supports the elastic engaging piece in a cantilever manner is arranged below the engaging portion. The fuel tank lid according to claim 1 or 2,
The engaging portion is provided on the cylindrical portion,
The elastic engagement piece is provided on the columnar portion,
A fuel tank lid, wherein a supporting portion of the columnar portion that supports the elastic engaging piece in a cantilever manner is arranged above the engaging portion.

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