JP2000280764A - Oil supplying device of fuel tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To apply an oil supplying device also to a resin-made tank main body not to be divided, by facilitating work for attaching a check valve to the tank main body, in a fuel tank. SOLUTION: A fuel tank is provided with a tank main body, a fuel injection pipe such as an inlet hose, and a check valve. A valve attaching part 14 is formed on the tank main body, and an engaging protrusion 14b is formed on the outer peripheral part of it. When the check valve is inserted in a passage 14a of the valve attaching part 14, a claw part of an engaging piece is engaged with and locked on the engaging protrusion 14b, and then sealed by an O-ring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel tank provided with a check valve for preventing fuel and fuel vapor in a tank body from flowing back to the outside.

[0002]

2. Description of the Related Art Conventionally, as a fuel tank of an automobile, there has been known a fuel tank provided with a check valve for preventing fuel and fuel vapor in a tank body from flowing back and being discharged to the outside during refueling. . FIG. 34 is a side view showing a part of a fuel tank of an automobile in a cutaway manner. The fuel tank 200 includes a fuel supply mechanism 210 on a side wall 204 of the tank body 202. The refueling mechanism 210 includes an inlet lower pipe 212 fixed to the side wall 204, and an inlet hose 21 attached to a distal end opening of the inlet lower pipe 212.
4, an inlet filler pipe 216 connected to the distal end opening of the inlet hose 214, and a fuel cap 218 attached to a fuel port 216 a of the inlet filler pipe 216. The tank body 20
A canister (not shown) is connected to the upper part of the tank 2, and fuel vapor in the tank body 202 is sent at the time of refueling or the like.

[0003] A check valve 220 is mounted on an opening 212a of the inlet lower pipe 212. The check valve 220 is for preventing fuel and fuel vapor in the tank body 202 from flowing back and being discharged to the outside during refueling. FIG. 35 is a sectional view showing a state where the check valve 220 is opened. In FIG. 35, the check valve 220 is connected to the housing 22 connected to the inlet lower pipe 212.
2 and a holding member 224 mounted on the housing 222
, A valve body 226 having a valve portion 226a, and a spring 2
28.

[0004] The holding member 224 is a member for supporting the valve body 226, and is formed by engaging a claw portion 224 c formed on a side wall portion 224 a with an engagement hole 222 a formed on the outer periphery of the housing 222. It is fixed to the housing 222. At one end of the holding member 224, fuel is supplied to the tank main body 2 together with an opening at the tip of the housing 222.
A discharge port 224d for discharging into the inside 02 is formed, and a guide part 225 for supporting the valve body 226 is formed at the center thereof. This guide part 225
Supports the support 226b of the valve body 226 slidably by the guide hole 225a.

Further, the guide portion 225 of the holding member 224
Supports one end of the spring 228. The other end of the spring 228 is supported by a spring stopper 226c fixed to the tip of the column 226b. Thus, the valve element 226 receives a biasing force in the valve closing direction by the spring 228.

With the structure of the check valve 220, when fuel reaches the valve body 226 by refueling, as shown in FIG.
The valve element 226 opens against the urging force of the spring 228, and fuel is supplied to the tank body 202 from the discharge port 224d. Then, when refueling is completed, the valve body 226 closes when the force in the valve opening direction received from the fuel falls below the urging force of the spring 228, and the fuel vapor in the tank body 202 is released to the outside. Preventing. Check valve 2
By disposing the fuel cell 20 in the tank body 202, low-temperature fuel can be sprayed from the check valve 220 over a wide range of the tank body 202, and the saturated vapor pressure of the fuel vapor in the tank body 202 is reduced, and the reverse flow of the fuel vapor Is further prevented.

[0007]

However, in the fuel tank 200, the tank body 202 is divided into an upper tank portion and a lower tank portion, and the check valve 220 is provided before the upper tank portion and the lower tank portion are integrated. Is attached to the bottom of the tank. That is, since the check valve 220 cannot be attached after the tank upper part and the tank lower part are integrated, it can be applied only to the fuel tank 200 of the type divided into the tank upper part and the tank lower part. However, there is a problem that the method cannot be applied to a fuel tank in which the tank body is not divided, as in the case of blow molding with a resin.

Further, in the metal fuel tank 200,
After joining the tank upper part and the tank lower part, the outer peripheral surface of the tank main body is painted. At this time, the tank main body 202 is exposed to a high temperature of about 170 ° C. for about two hours. For this reason, the check valve 220 attached to the tank body 202 needs to use a heat-resistant material containing glass fiber or the like so as to withstand this temperature.
This was a factor of cost increase.

The present invention solves the above-mentioned problems of the prior art, and can be applied to a configuration in which the mounting operation is easy and the tank body is not divided, and a check valve which does not require high heat resistance is provided. It is an object of the present invention to provide a fuel tank provided with the fuel tank.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The present invention provides a fuel injection pipe for injecting fuel into a tank main body, a tank main body and the fuel injection pipe. And prevents fuel and fuel vapor in the tank body from being discharged to the outside through the fuel injection pipe, and opens the fuel by injection of fuel into the fuel injection pipe to open the fuel in the tank body. A non-return valve to be introduced into the fuel tank,
A valve mounting portion provided so that the check valve can be mounted from the outside of the tank main body and having a passage for guiding fuel discharged from the check valve into the tank main body; and a tank side member formed in the valve mounting portion. And a housing having a valve chamber connected to a fuel injection pipe, and a discharge port for discharging fuel from the valve chamber into the tank body, and the check valve opens and closes the discharge port. A valve body, and a valve-side engaging portion that is formed on the housing and engages with the tank-side engaging portion when the housing is mounted on the valve mounting portion; And sealing means for sealing.

The check valve according to the present invention is connected between the tank main body and the fuel injection pipe, and opens when the fuel is injected into the fuel injection pipe to supply the fuel into the tank main body. Also,
When the fuel is not supplied, the valve body of the check valve closes the fuel passage to prevent the fuel and the fuel vapor in the tank body from flowing back and being discharged to the outside.

In order to attach the check valve to the tank body, the check valve housing is attached to the valve attaching portion from outside the tank body, and the valve side engaging portion formed in the check valve housing is attached to the valve attaching portion. This is performed by engaging a tank-side engaging portion provided in the portion. Thus, the check valve is attached to the tank body and connects the fuel injection pipe to the tank body. At this time, the check valve is securely attached to the tank body by the engagement of the valve side engagement portion of the housing with the tank side engagement portion of the tank body. At the same time, the sealing means is interposed between the tank body and the housing of the check valve to seal the inside of the tank body to the outside.

As described above, since the check valve can be mounted from the outside of the tank main body, the check valve can be integrally formed by blow molding with a resin main body without dividing the tank main body. Can also be applied.

Further, the check valve can be retrofitted to the tank body, that is, it can be attached after painting or welding of the tank body. Therefore, it is not necessary to use a heat-resistant material for the check valve. The range of choices is widened and it is easy to reduce costs.

[0015] In a preferred aspect of the present invention, as a sealing means, a sealing member for sealing the inside of the tank body to the outside is interposed between the housing and the valve mounting portion, thereby further improving the sealing performance. be able to. The seal member may be provided between the check valve and the valve mounting portion to seal the inside of the tank body to the outside. For example, the seal member may be provided on the inner peripheral side or the outer peripheral side of the valve mounting portion. Various modes, such as being disposed on one or both of them, being integrated in advance with the check valve, or being simply interposed with another member, can be adopted. Further, the sealing means may be formed separately from the housing or the like, may be formed integrally between the valve mounting portion and the housing, or may be formed integrally with a flexible resin therebetween.

In a preferred aspect of the present invention, it is preferable that the fuel injection pipe and the housing of the check valve are integrally formed of a resin material. This eliminates the need for a rubber hose or a seal member for connecting the fuel injection pipe and the check valve, thereby reducing the number of parts. Further, when the fuel injection pipe is formed of resin, gasoline permeability can be reduced as compared with the case where the fuel injection pipe is formed of rubber.

The tank-side engaging portion and the valve-side engaging portion are not particularly limited as long as they engage with each other to prevent the check valve from coming off the tank body. It may be formed integrally with the valve mounting portion of the main body or the housing of the check valve, or may be formed of a separate member.

According to another preferred aspect of the present invention, the housing is configured such that the front half of the housing and the rear half of the housing can be integrated by separate members, and the valve mounting portion is provided in the front half of the housing. A configuration in which a valve body is provided in the rear half of the housing can be adopted. With this configuration, if it is necessary to change the shape of the valve body etc. according to the shape of the fuel tank, the entire configuration of various check valves can be changed simply by changing the shape of the rear half of the housing only Therefore, there is no need to make a new mold in manufacturing the check valve, and the manufacturing process can be simplified.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the configuration and operation of the present invention described above, a preferred embodiment of the present invention will be described below.

FIG. 1 is a schematic diagram showing a fuel tank FT of an automobile. As shown in FIG. 1, the fuel tank FT includes a tank body TB and a fueling mechanism FS for supplying fuel into the tank body TB. The tank body TB is an integrated tank formed by a blow molding method using a resin material (high-density polyethylene). Further, a fuel cutoff valve 28 is mounted on an upper portion of the tank body TB. The fuel cutoff valve 28 is connected to a canister (not shown) via a pipe 28a.

FIG. 2 is a sectional view showing a fuel supply mechanism FS for supplying fuel to a fuel tank FT of an automobile, partially cut away. As shown in FIG. 2, the refueling mechanism FS connects the fuel tank FT to a fuel tank FT from a refueling unit FI attached to a side member outer 20 and a wheel house outer 30 (vehicle body-side mounting member) constituting the outer plate of the vehicle. The fuel supply system includes a fuel cap FC, an inlet filler pipe 40, a seal cup 50, a base 60, a connection pipe 80, and a check valve 90. The space SP between the side member outer member 20 and the wheel house outer member 30 and the periphery of the fuel cap FC of the wheel house outer member 30 are sealed by a seal cup 50.

With the configuration of the fuel supply mechanism FS, when the fuel cap FC is opened and fuel is supplied from the fuel gun (not shown) into the inlet filler pipe 40, the fuel becomes
The gas reaches the check valve 90 from the inlet filler pipe 40 via the connection pipe 80, opens the check valve 90, and is fed into the fuel tank FT. The check valve 90 is in a closed state other than during refueling, and prevents the fuel and the fuel vapor in the fuel tank FT from flowing back and being discharged to the outside even when the fuel cap FC is removed.

Hereinafter, the configuration of each part of the refueling mechanism FS will be described in detail. FIG. 3 is a cross-sectional view showing the vicinity of a fueling section FI of an automobile, and FIG. 4 is a cross-sectional view before the fueling section FI is assembled. In FIGS. 3 and 4, a side member outer 20 of the vehicle has a fuel filler opening 22 opened and closed by a fuel filler lid 21.
Are formed. An inlet 40 a of the inlet filler pipe 40 is arranged inside the vehicle of the fuel filler 22. The inlet filler pipe 40 supplies the supplied fuel to the fuel tank FT via the connection pipe 80 (see FIG. 2).
To send to. The inlet filler pipe 40 is
A pipe body 41 having a passage 40b;
Flange portion 4 formed slightly inward from injection port 40a of
2, a connecting portion 43 formed at the downstream end of the pipe main body 41, and a breather pipe 45 branched from a side wall of the pipe main body 41, and these are integrally formed of a fuel-resistant resin. The connection part 43 includes a connection pipe 80
Is press-fitted to connect the inlet filler pipe 40 to the connection pipe 80. In addition, a seal ridge 43 a is formed on the outer peripheral portion of the connection portion 43 to enhance the sealing performance between the connection portion 43 and the connection pipe 80.

The flange portion 42 extends in a disk shape from the side wall of the pipe body 41 and is mounted on the opening 32 of the wheel house outer 30 with one end of the seal cup 50 sandwiched therebetween. FIG. 5 is an enlarged cross-sectional view showing a peripheral portion of the flange portion 42, and FIG. 6 is an exploded cross-sectional view showing a state before assembly of the oil supply mechanism of FIG. That is, the bolt portion 42a is formed in the flange portion 42, and the bolt 72 is inserted into the bolt hole 42a and fastened by the nut 34, whereby the flange portion 42 of the inlet filler pipe 40 is fixed to the wheel house outer 30. At the same time, the cup bottom 51 of the seal cup 50 is fixed. In addition, the nut 34 is the wheel house outer 3
0 is fixed to the lower surface by welding.

Returning to FIG. 4, the seal cup 50 is formed in a cup shape surrounded by a side wall portion 52 and a cup bottom portion 51 by a rubber material, and the flange portion 42 and the wheel house are formed at the cup bottom portion 51 as described above. It is fixed by being sandwiched between the opening 32 of the outer 30 and is fixed to the side member outer 20 at the opening. FIG. 7 is a cross-sectional view showing the periphery of the opening of the seal cup 50, and FIG. 8 is a cross-sectional view showing a state before assembly in FIG. A fixing recess 54 is formed in the opening of the seal cup 50, and the seal cup 50 is fixed to the side member outer 20 by being pressed into the opening peripheral portion 23 of the side member outer 20. A ring recess 55 is formed in the opening, and the fixing ring 71 is press-fitted into the ring recess 55 to hold the opening of the seal cup 50 in a circular shape and to form the side member outer 20. The mounting strength to the is increased. As described above, the seal cup 50 is fixed to the side member outer 20 at the opening, and is fixed to the wheel house outer 30 at the cup bottom 51, so that the peripheral portion of the fuel cap FC is connected to the side member outer 20. The space SP between the wheel house outer 30 is sealed to protect the electric system wired in the space SP from water intrusion, and the space below the side member outer 20 and the wheel house outer 30 is protected by water. This prevents water from entering the closed area.

As shown in FIG. 4, a mouthpiece 60 is attached to the tip of the inlet filler pipe 40. The base 60 is a metal member for detachably mounting the fuel cap FC, and includes a base body 61 having a mounting space 61a. The cap holding portion of the inlet filler pipe 40 is provided in the mounting space 61a. 44 is inserted into the distal end of the inlet filler pipe 40 by being inserted. A screw portion 62 for stopping the fuel cap FC is formed on the inner side of the base body 61, and a positioning portion 63 for positioning a refueling gun inserted at the time of refueling is formed on the bottom side thereof. Is formed.

FIG. 9 is an explanatory view for explaining the positional relationship between the opening of the wheel house outer 30 and the inlet filler pipe 40. As shown in FIG. 9, an insertion notch 36 is formed in the opening of the wheel house outer 30. In other words, the breather pipe 45 is protruded from the side wall of the inlet filler pipe 40. The insertion notch 3 is used to prevent the breather pipe 45 from being inserted into the wheel house outer 30.
6 are formed.

Returning to FIG. 2, the inlet filler pipe 4
The connection pipe 80 connected to the downstream side of the bellows 0 is formed of rubber or resin, and has a bellows 8 for improving the bendability.
1 is provided. A check valve 90 is mounted downstream of the connection pipe 80.

FIG. 10 is a sectional view showing a peripheral portion of the tank body TB to which the check valve 90 is attached, and FIG. 11 is a sectional view showing a state before the check valve 90 is assembled to the tank body TB. 10 and 11, a valve mounting portion 14 is provided on the side of the tank body TB so as to protrude in a pipe shape. The valve mounting portion 14 is formed with a passage 14a that communicates the inside of the tank body TB with the outside. Further, on the side of the valve mounting portion 14, two engagement projections 14b, 14b (tank side engagement portion) for mounting the check valve 90 are formed at 180 ° positions as described later.

FIG. 12 is a side view showing the check valve 90, and FIG.
13 is a diagram viewed from the side of FIG. 12, and FIG. 14 is a diagram 14-1 in FIG.
FIG. 4 is a cross-sectional view of the check valve 90 taken along line 4. In these figures, the check valve 90 is connected to the fuel passage 80 of the connecting pipe 80.
a forming a valve chamber 91a communicating with the housing 91a
, A valve element 93 and a spring 95 as main components.

The housing 91 has a cylindrical shape in which a side wall portion 91b and a hose connection portion 91c projecting from the side wall portion 91b are integrally formed, and has a valve chamber 91a formed therein. The hose connection portion 91c is connected to the connection pipe 80.
Is connected to the fuel passage 80a of the connection pipe 80 to the valve chamber 91a. An engaging piece 91d (valve-side engaging portion) is formed on the outer peripheral portion of the housing 91. The engagement piece 91d is a resilient cantilever, and has a claw 91e at the tip. The claw portion 91e is provided in the housing 91 of the check valve 90.
The check valve 90 is prevented from falling out of the valve mounting portion 14 by engaging with the engagement protrusion 14b when the check valve 90 is inserted into the valve mounting portion 14. An annular groove 91f is formed in the outer peripheral portion of the housing 91. This annular groove 91f
, An O-ring 92 is mounted on the housing 91.
And the valve mounting portion 14 are sealed.

The other end of the housing 91 is a discharge port 91g, and the discharge port 91g is opened and closed by a valve 93. The valve element 93 includes a valve portion 93a and a shaft portion 93d formed integrally with the valve portion 93a. Valve section 93
a includes a seat portion 93b. Seat part 93b
Is a portion that opens and closes the discharge port 91g by being attached to and detached from the sheet surface 91h of the discharge port 91g. Further, a flare portion 93c is formed integrally with the sheet portion 93b. The flare portion 93c discharges fuel flowing through the valve chamber 91a to the discharge port 9c.
It is formed in a divergent shape so as to extend from 1 g to a wide range.

The valve body 93 is supported by a valve support portion 92 and a connection portion 92b of a housing 91 via a shaft portion 93d so as to be openable and closable. That is, a connection portion 92b and a valve support portion 92 for supporting the valve element 93 are provided on the valve chamber 91a side of the housing 91. The connecting portion 92b is
Three are radially arranged in the direction of 0 °, respectively, and a space therebetween is defined as a passage. A valve support portion 92 having a valve support hole 92a is integrally formed at a connection central portion of the three connection portions 92b. The shaft 93d of the valve body 93 is
The valve body 93 is movably supported by the housing 91 by penetrating the second valve support hole 92a. The tip of the shaft 93d is a snap fit that elastically engages the spring stopper 94.

A spring 95 biasing the valve element 93
Is mounted between the valve support 92 and the spring stop 94 by being mounted on the shaft 93d and engaging the spring stop 94 with an engagement portion 93e at the end of the shaft 93d. Therefore, the check valve 90 allows the shaft 93 d of the valve body 93 to pass through the valve support hole 92 a of the valve support 92,
After the spring 95 is mounted on the shaft 93d of the valve body 93, the spring stopper 94 is attached to the engaging portion 93e of the shaft 93d.
Can be assembled by engaging.

In the configuration of the check valve 90, the check valve 9
When 0 is closed, the fuel and the fuel vapor in the tank body TB are prevented from flowing backward and being discharged to the outside through the connection pipe 80 or the like. On the other hand, when fuel is supplied through the inlet filler pipe 40 and the connection pipe 80 at the time of refueling, the fuel flows from the fuel passage 80a through the valve chamber 91a of the check valve 90 and reaches the valve element 93. When the force from the fuel applied to the valve element 93 exceeds the urging force of the spring 95, the valve element 93 opens and the fuel is released from the tank body T.
B is supplied. At this time, the valve portion 93a of the valve body 93
Guides the fuel through the flared flared portion 93c and spreads the fuel over a wide range in the tank body TB. This prevents the low-temperature fuel at the time of refueling from lowering the saturated vapor pressure in the tank body TB, thereby preventing the fuel vapor from being released to the outside.

Next, an operation of attaching the refueling mechanism FS to the vehicle body in an automobile assembly line will be described. The following work is performed in advance as preparation before mounting the refueling mechanism FS. That is, the fuel tank FT is mounted on the vehicle body, and the nut 34 is welded to the wheel house outer 30 in advance. Further, the base 60 is fixed to the cap holding portion 44 of the inlet filler pipe 40 and the connecting portion 4
3 is connected to a connection pipe 80, and a check valve 90 is attached to the end of the connection pipe 80 to form an assembly. Further, as shown in FIGS. 7 and 8, a fixing ring 71 is attached to the ring recess 55 of the seal cup 50.

Next, the filler port 2 of the side member outer 20
2, the seal cup 50 is inserted from the outside of the vehicle body, and the assembled inlet filler pipe 40 and the like are further inserted. At this time, as shown in FIG. 9, the breather pipe 45 on the side wall of the inlet filler pipe 40 is aligned with the insertion notch 36 formed in the opening of the wheel house outer 30. Then, as shown in FIG. 5 and FIG. 6, the cup bottom 51 of the seal cup 50 is
Is sandwiched between the wheel housing outer 30 and the outer periphery of the opening. Subsequently, the fuel supply port 22 of the side member outer 20
The seal cup 50 is clamped between the flange portion 42 and the wheel house outer 30 by fastening the bolt 72 to the nut 34 by an operation from the side. Further, as shown in FIGS. 11 and 10, by engaging the engagement piece 91 d of the check valve 90 with the valve mounting portion 14, the tank body TB
Attach to Thereby, the refueling mechanism FS is fixed to the side member outer 20 and the wheel house outer 30. As shown in FIG. 6B, as another mode for attaching the inlet filler pipe 40 to the wheel house outer 30, the inlet filler pipe 40
The engagement hole 51a of the seal cup 50 is
Is temporarily provided with a locking claw 42b for temporary fixing. Then, as a preparation before attaching to the refueling mechanism FS, the engaging claw 42b is engaged with the engaging hole 51a to integrate the inlet filler pipe 40 and the seal cup 50, and then from the outside of the vehicle body through the refueling port 22. The inlet filler pipe 40 and the like may be inserted and assembled.

Subsequently, in order to mount the check valve 90 to the tank body TB from the state shown in FIG. 11, the check valve 90 is inserted into the valve mounting portion 14 from outside the tank body TB. At this time, the claw portion 91e of the engagement piece 91d of the check valve 90 is engaged with the engagement protrusion 14b of the valve mounting portion 14. Thereby, the check valve 90 is prevented from coming off with respect to the tank body TB. In this state, the space between the valve mounting portion 14 and the housing 91 of the check valve 90 is sealed by the O-ring 92. As described above, if the check valve 90 is inserted into the passage 14a of the valve mounting portion 14 from the outside of the tank body TB, the check valve 90 can be easily mounted on the tank body TB with one touch, and high sealing performance is ensured. Can be.

In the operation of assembling the refueling mechanism FS, an assembly such as the inlet filler pipe 40 can be attached from the outside of the automobile through the oil supply port 22 of the side member outer 20. No workability is excellent.

Further, when the inlet filler pipe 40 is attached to the wheel house outer 30, the cup bottom 51 of the seal cup 50 is sandwiched between the flange 42 of the inlet filler pipe 40 and the wheel house outer 30, so that the seal cup 50 At the same time as the mounting work, the periphery of the fuel cap FC can be sealed with respect to the space SP between the side member outer 20 and the wheel house outer 30. In addition, the cup bottom 51 of the seal cup 50 is connected to the flange 42 of the inlet filler pipe 40 and the wheel house outer 30.
Since the function of the seal member for sealing between the two members is also used and another seal member is not required, the configuration can be simplified.

Since the check valve 90 may be mounted from outside the tank body TB, the check valve 90 can also be applied to a non-divided type as described in the prior art. That is, in addition to a metal fuel tank, any resin fuel tank molded by a blow molding method or the like can be applied.

Further, the check valve 90 can be retrofitted from outside the tank body TB, that is, the tank body TB
Since it can be attached after painting or welding, it is not necessary to use a heat-resistant material for the material of the check valve 90, and the range of material selection is widened, and it is easy to reduce costs.

FIG. 15 is a half sectional view showing an oil supply mechanism according to another embodiment. FIG. 16 is a side view of a main part of FIG.
7 is a sectional view taken along the line aa in FIG. 16, and FIG.
FIG. 4 is a cross-sectional view taken along line bb of FIG. In the present embodiment, the inlet filler pipe 40B and the breather pipe 45
B and a signal pipe 46 for keeping the pressure in the fuel tank constant are formed separately. That is, a flange portion 47 is formed at a connection end of the breather pipe 45B and the signal pipe 46, and the breather pipe 45B is formed through the flange portion 47.
And the signal pipe 46 is the inlet filler pipe 4
OB is thermally welded. The breather pipe 45B and the signal pipe 46 are connected to the inlet filler pipe 4
It is bent at a substantially right angle so as to be arranged in parallel with zero.

In the above configuration, the breather pipe 45B
Since the signal pipe 46 is bent substantially at right angles to the inlet filler pipe 40B to shorten the distance L1 to the inlet filler pipe 40, FIG.
The opening 32 of the wheel house outer 30 as shown in FIG.
The assembly such as the inlet filler pipe 40 can be assembled in the wheel house outer 30 of the vehicle body without forming the insertion notch 36 in the vehicle body. In addition, since the breather pipe 45B is a separate part from the inlet filler pipe 40, it is easy to divide the mold at the time of injection molding, and it is easy to share parts.

As means for attaching the inlet filler pipe to the wheel house outer (body side member), various means such as bolts, screws, clips and the like which can be fastened from the outside of the automobile can be used.
For example, a clip 102B shown in FIG. 15, a clip 102C and an engaging portion 102D shown in FIGS. 19 and 20 can be used. Clip 102B shown in FIG.
Has an engaging portion 102Ba at the distal end, and the clip 102C shown in FIG. 19 has an engaging portion 102Ca formed of a multi-step projection. The engaging portion 102 shown in FIG.
D is a flange portion 42 of the inlet filler pipe 40.
It protrudes in the shape of a letter from the bottom. These engaging portions are elastically deformed at the time of fastening to fasten to the vehicle body side member. The clips 102B and 102C and the engaging portion 1
Since 02D does not use a nut and performs a retaining action by elastic deformation, the number of parts can be reduced, and it can be performed by one-touch mounting work, which is more excellent in workability. Further, since the clips 102B, 102C and the engaging portion 102D can be assembled into the vehicle body by assembling the seal cup 50 in advance into the inlet filler pipe 40, the workability can be improved.

As another means for attaching the inlet filler pipe to the wheel house outer (body-side member), the embodiment shown in FIGS.
25 and the embodiments shown in FIGS. 27 to 30
The embodiment shown in FIG.

As shown in FIGS. 21 to 23, the clip 102E protruding from the flange portion 42E of the inlet filler pipe 40 is applied with a predetermined load or more that separates the wheel house outer 30 from the inlet filler pipe 40. In this case, the inlet filler pipe 40 is separated from the wheel house outer 30 when it comes out. That is, the clip 102E includes a root portion 102Ea, a bent portion 102Eb, and a distal end locking portion 1
02Ec is integrally bent. FIG.
From the state shown in FIG. 22, as shown in FIG.
When E is inserted into the mounting hole 51b of the seal cup 50 and the mounting hole 30b of the wheel house outer 30, the clip 102E is elastically deformed, and the leading end engaging portion 102Ec hits the lower surface of the wheel house outer 30, and the inlet filler pipe 40 is prevented from coming off. Is done.

If the load that separates the inlet filler pipe 40 and the wheel house outer 30 becomes greater than a predetermined value due to the rearward collision of the vehicle and the movement of the tank body, the base 102Ea of the clip 102E and the tip The space between the stop portion 102Ec and the stop portion 102Ec becomes narrow due to elastic deformation, and comes out of the mounting hole 30b and the mounting hole 51b. Therefore, the inlet filler pipe 40 is connected to the wheel house outer 30.
And no large force is applied to the inlet filler pipe 40.

As shown in FIGS. 24 and 25,
The clip 102F may be configured to be broken when a load equal to or more than a predetermined value that separates the inlet filler pipe 40 and the wheel house outer 30 is applied.
The clip 102F includes a root portion 102Fa and a root portion 10F.
Tip locking portion 102F protruding from 2Fa at an acute angle
b. When a load equal to or more than a predetermined value is applied between the inlet filler pipe 40 and the wheel house outer 30, as shown in FIG. 25, it breaks between the acute-angled root portion 102 Fa and the tip locking portion 102 Fb, The inlet filler pipe 40 and the wheel house outer 30 are separated. This can prevent a large load from being applied to the inlet filler pipe 40.

As shown in FIG. 26, another means for separating the wheel house outer 30 and the inlet filler pipe 40 when a load more than a predetermined value is applied between the wheel house outer 30 and the inlet filler pipe 40, as shown in FIG. Cut 4 on bottom
A configuration in which 2d is formed in a ring shape can be adopted. That is, the flange portion 42 includes the bolt 72 and the nut 34.
Notches 42 in the flange 42 on the inner peripheral side of the fastening means.
By forming d, the mechanical strength of this portion decreases. Therefore, the notch 42 due to a predetermined load or more.
It breaks at the part d, and protects the wheel house outer 30. In this configuration, the notches 42d may be formed on both upper and lower surfaces of the flange 42,
By forming it on the lower surface of the substrate, the design can be improved.

Further, as shown in FIGS. 27 to 30, the inlet filler pipe 40 may be attached to the wheel house outer 30 without using bolts or clips. FIG. 27 is an explanatory diagram illustrating a state before the inlet filler pipe 40 is assembled to the wheel house outer 30. FIG. 28 illustrates a positional relationship between the inlet filler pipe 40 and the wheel house outer 30 when FIG. 27 is viewed from below. FIG.

As shown in FIG. 27, on the lower surface of the flange portion 42 of the inlet filler pipe 40, the engagement recess 11 is provided.
L-shaped engagement pieces 110, 110 having Oa protrude axially symmetrically. The engagement pieces 110, 110 have a gap between the lower surface of the flange 42 and the periphery of the opening 32 of the wheel house outer 30. on the other hand,
The opening 32 of the wheel house outer 30 has an engaging piece 1
Insertion notches 38, 38 into which 10 can be inserted are formed. Further, the wheel house outer 30 has a direction perpendicular to the insertion notches 38, 38 and the engagement recess 1.
An engagement protrusion 39 that engages with 10a is formed.

In order to attach the inlet filler pipe 40 to the wheel house outer 30, as shown in FIG. 28, the engaging pieces 110 are aligned with the insertion notches 38, 38, and the inlet filler pipe 40 is moved from outside the vehicle. insert. Subsequently, when the inlet filler pipe 40 is rotated, the periphery of the opening 32 of the wheel house outer 30 is sandwiched between the flange portion 42 and the engagement piece 110. Then, as shown in FIG. 29, when the inlet filler pipe 40 rotates to nearly 90 °, the engagement protrusion 39
Hits the engagement recess 110a, and when a predetermined torque is further applied to the inlet filler pipe 40, the engagement projection 39 engages with the engagement recess 110a as shown in FIG. Thereby, the inlet filler pipe 40 is positioned on the wheel house outer 30.

Since the inlet filler pipe 40 does not use any fastening means such as bolts to be attached to the wheel house outer 30, a fastening tool or the like is not required and the workability is excellent. In addition, a predetermined torque is required to engage the engagement recess 110a and the engagement protrusion 39, and a predetermined sense of moderation can be obtained when the two are engaged.

In the above embodiment, the seal cup 50 is used as a sealing means between the flange portion 42 of the inlet filler pipe 40 and the wheel house outer 30.
However, the present invention is not limited to this, and another seal member may be used.

The inlet filler pipe 40 may be formed of a conductive resin to impart conductivity and to be grounded, since the inner wall surface of the inlet filler pipe 40 is charged with static electricity when fuel flows during refueling. In order to make the inlet filler pipe 40 a conductive resin, the following configuration can be adopted. That is, it is obtained by combining one or more of the conductive whisker, the conductive carbon, and the conductive graphite powder, mixing the mixture into a resin material, and performing injection molding. In this case, the inlet filler pipe 40 preferably has a volume resistivity of 10 ¹¹ Ω · cm or less, at which static electricity can be conducted, and more preferably has a volume resistivity of 10 ⁹ Ω · cm or less. To achieve such a volume resistivity, 5 parts by weight of conductive whiskers and 10 parts by weight of conductive carbon are mixed with 100 parts by weight of polyacetal or polyamide (PA). Here, as a conductive whisker (trade name: Dentol: manufactured by Otsuka Chemical Co., Ltd.)
As conductive carbon (trade name Vulcan XC-7)
2: Cabot Corporation). The reason that the conductive fine material such as conductive whisker, conductive carbon, and conductive graphite was mixed into the insulating resin material such as polyacetal and polyamide in order to obtain the above-described volume resistivity only by the conductive resin was used. Then, the mechanical strength is reduced, and the impact resistance condition of the inlet filler pipe 40 is not satisfied. In addition, as the resin for imparting conductivity, other than polyacetal and polyamide, any material having excellent fuel resistance and fuel permeation resistance may be used. For example, a fluororesin (ETFE) or the like may be used. .

As described above, the inlet filler pipe 4
If conductivity is given to 0, the inlet filler pipe 4
If the part 0 is attached in a state of being in contact with the wheel house outer 30, the inlet filler pipe 40 can be grounded to the vehicle body side member. Therefore, the troublesome work of routing the ground wire to the inlet filler pipe 40 becomes unnecessary, and the workability can be improved and the cost can be reduced.

In order to impart conductivity to the inlet filler pipe 40, the inlet filler pipe 40 is formed by injection molding with the above-described conductive resin, and a conductive material is applied to the surface of the inlet filler pipe 40. Alternatively, a configuration in which a conductive resin is used for an inner layer which is formed in two layers of an inner layer and an outer layer and which comes into contact with at least fuel to be supplied can be adopted.

FIG. 31 shows a check valve 1 according to another embodiment.
FIG. The check valve 130 has a mounting structure with the valve mounting portion 14 of the tank body TB.
And other configurations are almost the same. In FIG. 31, an annular holding portion 1
33 are formed. The annular holding portion 133 is formed of two stages, a small-diameter portion 133a in which the outer circumference of the housing 132 is enlarged, and a large-diameter portion 133b in which the diameter is further increased from the small-diameter portion 133a. I have. A space for inserting the valve mounting portion 14 of the fuel tank FT is provided on the inner peripheral side of the storage space 133c, and a space for storing the O-ring 134 and the spacer 135 is provided on the outer peripheral side. O-ring 13
Numeral 4 is stored at the innermost side of the storage space 133c, and seals between the housing 132 and the valve mounting portion 14. The spacer 135 is an O-ring 1
The O-ring 134 is prevented from rattling on the side surface of the O-ring 134. Further, the storage space 13 for the large diameter portion 133b
3c, a retainer 136 is held. FIG. 32 is a plan view showing the retainer 136. FIG. Retainer 136
Is a supporting portion 136 supported on the inner wall surface of the large diameter portion 133b.
a, 136a, arch portions 136b, 136b bridged between support portions 136a, 136a, and arch portion 13
Claw portions 136c, 136c fixed to 6b, 136b
(Valve-side engaging portion). This claw part 136c, 1
36c, the check valve 130 engages with the engagement protrusion 14b (tank-side engaging portion) when the housing 132 of the check valve 130 is inserted into the valve mounting portion 14 so that the check valve 130 is
It is prevented from falling out.

In order to mount the check valve 130 on the tank body TB, the storage space 133c of the annular holding portion 133 is required.
After storing the O-ring 134, the O-ring 13
4 is held down by the spacer 135, and the retainer 136 is further housed. Then, the check valve 130 is inserted into the valve mounting portion 14 from outside the tank body TB. The valve mounting portion 14 is provided with the claw portions 136c and 136 of the retainer 136 at the engagement protrusions 14b.
6c, the arch portions 136b, 136b are expanded.
In a state where the engagement protrusion 14b has passed over the claw portions 136c, 136c, the valve mounting portion 14 is inserted into the inner peripheral side of the storage space 133c, and the engagement protrusion 14b is
6c and 136c. Thereby, the check valve 130 is stopped with respect to the tank body TB. In this state, the space between the valve mounting portion 14 and the housing 132 of the check valve 130 is sealed by the O-ring 134. Check valve 1
At 30, the position of the O-ring 134 is
And a claw portion 136c for engaging with the tank main body TB side is formed in a separate member from the housing 132, and thus various configurations can be taken as the sealing structure and the mounting structure. it can.

The present invention is not limited to the above-described embodiment, but can be embodied in various modes without departing from the gist thereof. For example, the following modifications are possible.

(1) In the above embodiment, the description has been made of the configuration in which the housing 91 of the check valve 90 and the connection pipe 80 are formed separately and connected. However, the present invention is not limited to this. Good. In this case, the number of parts can be reduced, and the resin pipe can reduce the oil permeability of the fuel as compared with the case of using a rubber hose, and further, a rubber hose for connection is not required. .

(2) In the above embodiment, the seal member such as the O-ring is used for the check valve and the valve mounting portion 14 of the housing.
Although only one is used between the two, a plurality may be arranged in parallel according to the specification of the sealing property, and the sealing structure is not particularly limited.

FIG. 33 shows a check valve 9 according to another embodiment.
It is sectional drawing which shows OC. In FIG. 33, the check valve 90
C has a feature in the configuration in which the housing 91C is formed by being divided, and other configurations are the same as those in FIG. 10. Therefore, the configuration of the housing 91C will be mainly described. That is, the housing 91C includes a housing front half 92C having an engagement piece 91d for mounting to the tank body TB, and the valve body 9C.
And a rear half 93C of the housing 3 for attaching the third housing 3 thereto. The housing front half 92C has an inner annular portion 92 at one end.
And a male screw 92C on the outer periphery of the inner annular portion 92Ca.
b is formed. On the other hand, the housing rear half 93
C has a female screw 93Ca screwed into the male screw 92Cb of the housing front half 92C at one end inner peripheral portion.
By screwing the male screw 92Cb and the female screw 93Ca, the housing front half 92C and the housing rear half 93C are integrally connected.

In order to assemble the check valve 90C to the tank body TB, the valve element 93 and the like are assembled to the rear half 93C of the housing, and then the rear half 93C of the housing is assembled to the front half 92C of the housing. Then, the engagement piece 91d of the check valve 90C is attached to the valve attachment portion 14 of the tank body TB.

As described above, the check valve 90C can be separated into the front half portion 92C of the housing and the rear half portion 93C of the housing, so that the route, angle, and length of the inlet pipe differ for each vehicle. Even if a different type is required, for example, a different check valve can be obtained by assembling the housing rear part 93C and a housing rear part 94C having a different shape. In this manner, only the rear half portions 93C and 94C of the housing need be changed, and there is no need to change the configuration of the entire check valve. Therefore, it is not necessary to manufacture various molds for each vehicle, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a fuel tank FT of an automobile.

FIG. 2 is a cross-sectional view showing a fuel supply mechanism FS for supplying fuel to a fuel tank FT of an automobile, partially cut away.

FIG. 3 is a cross-sectional view showing the vicinity of a fueling section FI of the automobile.

FIG. 4 is a sectional view before assembling a refueling unit FI.

FIG. 5 is an enlarged sectional view showing a peripheral portion of a flange portion 42;

FIG. 6 is an exploded cross-sectional view showing a state before assembly of the oil supply mechanism of FIG. 5;

FIG. 7 is a sectional view showing the periphery of an opening of the seal cup 50;

FIG. 8 is a sectional view showing a state before assembly in FIG. 7;

FIG. 9 is an explanatory diagram illustrating a positional relationship between an opening of a wheel house outer 30 and an inlet filler pipe 40.

FIG. 10 is a sectional view showing a state where the check valve 90 is assembled to the tank body TB.

FIG. 11 is a sectional view showing a state before the check valve 90 is assembled to the tank body TB.

FIG. 12 is a side view showing the check valve 90.

FIG. 13 is a view as seen from the direction of the arrow in FIG. 12;

14 is a cross-sectional view of the check valve 90 taken along line 14-14 of FIG.

FIG. 15 is a half sectional view showing an oil supply mechanism according to another embodiment.

FIG. 16 is a side view of a main part of FIG.

FIG. 17 is a sectional view taken along the line aa in FIG. 16;

FIG. 18 is a sectional view taken along line bb of FIG. 16;

FIG. 19: Clip 1 of inlet filler pipe 40
It is sectional drawing which shows the state before mounting by 02C.

FIG. 20 shows an inlet filler pipe 40 and an engaging portion 10;
It is sectional drawing which shows the state before mounting in 2D.

FIG. 21 shows an inlet filler pipe 40 clip 1
It is sectional drawing which shows the state before mounting by 02E.

FIG. 22 shows an inlet filler pipe 40 clip 1
It is sectional drawing which shows the state attached at 02E.

FIG. 23 is an explanatory diagram illustrating a state in which the inlet filler pipe 40 comes off the wheel house outer 30.

FIG. 24: Clip 1 of inlet filler pipe 40
It is sectional drawing which shows the state before mounting by 02F.

FIG. 25 is an explanatory diagram illustrating a state in which the inlet filler pipe 40 comes off the wheel house outer 30.

FIG. 26 shows an inlet filler pipe 4 according to another example.
FIG. 4 is an explanatory diagram illustrating a configuration for removing a wheel house from a wheel house outer.

FIG. 27 is an explanatory diagram illustrating a state before the inlet filler pipe 40 is assembled to the wheel house outer 30.

FIG. 28 is an explanatory diagram illustrating a state viewed from below in FIG. 27;

FIG. 29 is an explanatory diagram illustrating a state in which the inlet filler pipe 40 is rotated by 90 ° from FIG.

FIG. 30 shows an inlet filler pipe 40 and an engagement piece 11
It is explanatory drawing explaining the state attached at 0.

FIG. 31 is a half sectional view showing a check valve 130 according to another embodiment.

32 is a plan view showing a retainer 136. FIG.

FIG. 33 is a cross-sectional view showing a check valve 90C according to another embodiment.

FIG. 34 is a side view showing a fuel tank of a conventional automobile partially broken away.

FIG. 35 is a sectional view showing a conventional check valve 220.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 14 ... Valve mounting part 14a ... Passage 14b ... Engagement protrusion 20 ... Side member outer 21 ... Oil supply lid 22 ... Oil supply opening 23 ... Opening peripheral part 24 ... Inlet hose 28 ... Fuel cutoff valve 28a ... Pipe line 30 ... Wheel house outer 30b Mounting hole 32 Opening 34 Nut 36 Insert notch 38, 38 Insert notch 39 Engagement projection 40 Inlet filler pipe 40B Inlet filler pipe 40a Injection port 40b Passage 41 Pipe body 42 ... Flange part 42a ... Bolt hole 42b ... Locking claw 42E ... Flange part 43 ... Connecting part 43a ... Seal ridge 44 ... Cap holding part 45 ... Breezer pipe 45B ... Breezer pipe 46 ... Signal pipe 47 ... Flange part 50 ... Seal cup 51a: engagement hole 51b: mounting hole 51: cup bottom 52: Side wall portion 54: Fixing recess 55: Ring recess 60: Base 61: Base body 61a: Mounting space 62: Screw portion 63: Positioning portion 71: Fixing ring 72: Bolt 80: Connection pipe 80a: Fuel passage 81 ... bellows 90 ... check valve 90C ... check valve 91 ... housing 91C ... housing 91a ... valve chamber 91b ... side wall section 91b ... seat section 91c ... hose connection section 91d ... engagement piece 91e ... claw section 91f ... annular groove 91g ... Discharge port 91h ... seat surface 92 ... valve support portion 92a ... valve support hole 92b ... connecting portion 92C ... housing front half portion 92Ca ... inner annular portion 92Cb ... male screw 93 ... valve body 93a ... valve portion 93b ... seat portion 93c ... flare portion 93d: Shaft portion 93e: Engagement portion 93C, 94C: Rear half portion of housing 93Ca: Female screw 94: Spring stop portion 95: Splice 102B ... clip 102B ... clip 102Ba ... engaging portion 102C ... clip 102Ca ... engaging portion 102D ... engaging portion 102E ... clip 102Ea ... root portion 102Eb ... bending portion 102Ec ... tip locking portion 102F ... clip 102Fa ... root portion 102Fb: Tip locking portion 110: Engagement piece 110a: Engagement recess 130: Check valve 132: Housing 133a: Small-diameter portion 133b: Large-diameter portion 133c: Storage space 133: Annular holding portion 135: Spacer 136: Retainer 136c ... claw part 136a ... support part 136b ... arch part FT ... fuel tank TB ... tank body FS ... refueling mechanism FI ... refueling part FC ... fuel cap SP ... space

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tomohide Aoki 1 Ochiai, Nagahata, Kasuga-cho, Nishi-Kasugai-gun, Aichi F-term in Toyoda Gosei Co., Ltd. 3D038 CA25 CA38 CC03 CC04

Claims (4)

[Claims] 1. A fuel injection pipe for injecting fuel into a tank main body, a connection between the tank main body and the fuel injection pipe, and a fuel and a fuel vapor in the tank main body being passed through the fuel injection pipe. A check valve that prevents the fuel from being released to the outside and opens by injecting the fuel into the fuel injection pipe to introduce the fuel into the tank main body. A valve mounting portion provided so that the check valve can be mounted from the outside of the main body and having a passage for guiding fuel discharged from the check valve into the tank main body; and a tank-side engaging portion formed in the valve mounting portion. And a housing having a valve chamber connected to a fuel injection pipe and a discharge port for discharging fuel from the valve chamber into the tank body; and a valve element for opening and closing the discharge port. And formed on the housing And a valve-side engaging portion that engages with the tank-side engaging portion when the housing is mounted on the valve mounting portion; and sealing means for sealing between the housing and the tank body. A fuel tank, characterized in that: 2. The fuel supply device for a fuel tank according to claim 1, wherein the sealing means is a sealing member interposed between the housing and the valve mounting portion. 3. The fuel tank according to claim 1, wherein the fuel injection pipe and the housing of the check valve are integrally formed of resin. 4. The housing according to claim 1, wherein the housing is configured such that a front half of the housing and a rear half of the housing can be integrated by separate members.
A fuel supply device for a fuel tank, wherein the valve mounting portion is provided in a front half of a housing and a valve body is provided in a rear half of the housing.