JP2000006675A - Oil feed pipe device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the sealing property, manufacturing property and fitting/ replacing property of a shutter packing by providing a lug having a side wall face section inclined toward the atmospheric side on a shutter member, and providing a lip section kept in contact with the side wall face section and extending nearly in the axial direction on the shutter packing. SOLUTION: A seal packing 3 seals the gap with the nozzle tip section of an oil feed gun 250 inserted for oil feeding. A shutter 7 serving as a shutter member is rotated by a rotary shaft 1f via a support arm 7a to close an opening section 1c, and it is provided with a lug having a side wall face section inclined toward the atmospheric side to the center section where the oil feed gun 250 is inserted. A shutter packing 5 is provided with a lip section kept in contact with the side wall face section and extending nearly in the axial direction, and the lip section is kept in contact with the side wall face section of the shutter 7 when the shutter 7 is closed. The manufacturing property of the shutter packing 5 is improved, and a more stable sealing property is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel supply pipe device provided at a fuel supply port of a fuel supply pipe connected to a fuel tank of an automobile, for example.

[0002]

2. Description of the Related Art Conventionally, in order to prevent the emission of fuel vapor such as gasoline at the time of refueling, a refueling pipe device serving as a so-called refueling port is provided at a tip end of a refueling pipe connected to a fuel tank of an automobile. I have.

FIG. 5 is a view for explaining a cross-sectional structure of this kind of oil supply pipe device 100. As shown in FIG. The fuel supply pipe device 100 has a substantially cylindrical shape, and one end of a cylindrical portion 101 a of a body 101 is fitted and fixed to a fuel supply port 201 of a fuel supply pipe 200.

[0004] The body 101 has a flange portion 101b protruding radially inward at one end side (the oil supply pipe 200 side) of the cylindrical portion 101a, and the other end side (the side where the oil supply gun 250 is inserted) of the cylindrical portion 101a. The filler neck 102 is fitted and fixed by a flange portion 102a folded back in the axial direction.

[0005] The filler neck 102 is provided with a refueling gun 250.
An inclined guide surface portion 102b and an opening 102c are formed at the distal end of the inclined guide surface portion 102b so as to serve as an insertion guide for the nozzle tip portion.

[0006] On the flange portion 101b of the body 101,
Opening 10 into which nozzle tip of refueling gun 250 is inserted
1c is formed, and the seal packing 103 is fitted.

The seal packing 103 includes a lip portion 103a for sealing a gap between the nozzle tip of the refueling gun 250 inserted when refueling, and a flange portion 103b abutting against an annular seating surface 101d provided in the opening 101c. It has. The flange 103b of the seal packing 103 is fixed by the fixing ring 104 so as to be sandwiched between the seal packing 103 and the annular seating surface 101d.

The fixing ring 104 is fixed to the fitting portion of the body 101 by press-fitting, or is fixed by welding the fixing ring 104 to the body 101 (heating welding or ultrasonic welding). I have.

Further, the flange portion 101b of the body 101
A shutter packing 105 is fixed to the oil supply pipe 200 side by a fixing ring 106. The fixing ring 106 is also fixed by the same method as the fixing ring 104.

The shutter 107 has a flange 101b.
Support portion 10 projecting in the axial direction (offset amount L1)
The supporting arm 107 is rotated by the rotating shaft 101f at the front end of 1e.
The shutter 101 is rotated through a, abuts on the shutter packing 105, and closes the opening 101c. 108 is shutter 1
07 is a spring that urges 07 in the closing direction.

This offset amount L1 is determined by the shutter 10
7, the lip 105a of the shutter packing 105 is brought into full contact with the lip 105a of the shutter packing 105 with a more uniform lip flexure amount to obtain a good sealing state.
07 is provided to increase the opening degree when the refueling gun 250 is inserted so as not to hinder the inflow of fuel.

When the refueling gun 250 is not inserted (the refueling cap (not shown) is opened), the shutter 107 closes to release fuel vapor from the refueling pipe 200 to the outside. Alternatively, it is possible to prevent a foreign substance or the like from accidentally entering the inside of the oil supply pipe 200.

[0013]

In the conventional oil supply pipe device 100 having such a configuration, the shutter gasket 105 is provided in a non-contact state (a valve open state) of the shutter 107 in order to improve the sealing property with the shutter 107. )
6A, the lip portion 105a is slightly raised toward the oil supply pipe 200 side (the left side in the figure) as shown in FIG. 6A. As shown in FIG.
5a is bent and deformed to follow the deformation and inclination of the shutter 107, thereby exhibiting the sealing property.

However, since the offset amount L1 exists, the shutter 107 is
When the shutter 107 comes into contact with immediately before contact with the shutter 5, the moving amount of the shutter 107 has a radial component (in the direction of the arrow A <b> 101). There is a concern that the sealing performance may be reduced.

Note that the shutter 107 is pressed against the shutter packing 105 even when the pressure in the fuel tank to which the fuel supply pipe 200 is connected becomes high. However, in this case, there is a radial component in the movement amount. Become.

The radial component of the movement amount of the shutter 107 mainly depends on the offset amount L1.
As the offset amount L1 increases, the radial component of the movement amount also increases.

The lip deflection of the lip portion 105a is larger on the side (lower side in the figure) away from the rotation shaft 101f because the rotation shaft 101f is displaced from the center axis of the oil supply pipe device 100. It is difficult to make it uniform all around.

The problem with productivity is that the lip 10
5a is warped outward, so that the shutter packing 10
When the mold 5 is molded, the mold needs to be removed from the mold (the product is released while being bitten by the cavity of the mold). It was hanging.

The process of attaching the shutter packing 105 to the flange portion 101b of the body 101 will be described with reference to FIG. 7, which is an enlarged view of the portion D101 in FIG. In the state, the mounting seat surface 101g of the flange portion 101b is
To the shutter packing 1 with the fixing ring 106.
05 and fix the flange 105b.

Mounting seat surface 101g of fixing ring 106
The welding is performed by ultrasonic welding, in which the annular tip 260a of the welding horn 260 is pressed against the fixing ring 106 while avoiding interference with the lip 105a of the shutter packing 105.

However, since the lip portion 105a is warped outward, the area of the annular tip portion 260a of the welding horn 260 is reduced to avoid interference, and the stability of the welding process may be impaired.

Also, when the shutter packing 105 is incorporated (fitted) into the fixing ring 106, it is necessary to narrow the lip portion 105a that is warped outward, which makes the operation difficult and requires many steps.

On the other hand, the seal packing 103 which comes into contact with the nozzle portion of the refueling gun 250 is attached by fixing the fixing ring 104 to the flange portion 101b of the body 101 by ultrasonic welding similarly to the shutter packing 105.

When the nozzle portion of the refueling gun 250 is inserted, the nozzle portion may be damaged due to scratches or contamination of the nozzle portion.

However, the conventional seal packing 10
Since the mounting method 3 is fixed to the flange portion 101b, it is difficult to replace the seal packing 103, and the entire body 101 needs to be replaced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and has as its object to improve the sealability and manufacturability of a shutter gasket in contact with a shutter; It is an object of the present invention to provide an oil supply pipe device which can easily replace and replace a seal packing which comes into contact with the oil supply pipe.

[0027]

In order to achieve the above object, according to the present invention, there is provided a hinge type which is disposed at an oil supply port of an oil supply pipe and is pushed by a nozzle tip of an oil supply gun to open an insertion hole. A shutter member, a shutter packing that abuts on the closed shutter member, and a seal packing that seals a gap between the outer periphery of the nozzle of the oil gun and the insertion hole, wherein the shutter member includes: The shutter packing includes a convex portion having a side wall surface inclined toward the atmosphere, and the shutter packing includes a lip portion extending substantially in the axial direction and in contact with the side wall surface portion.

With this configuration, the tip of the lip of the shutter packing and the abdomen slightly away from the tip abut on the side wall surface of the shutter member, so that a stable sealing property can be obtained.

At this time, even if there is a radial component in the amount of movement immediately before the shutter member closes, the lip portion is deformed with the movement of the side wall surface portion. It is possible to prevent a decrease in the performance.

Since the lip portion does not need to be largely warped, the productivity of the shutter packing can be improved, such as improving the releasability of the lip portion during molding, preventing interference with the welding horn in the welding process, and improving the incorporation into the fixing ring. Improve.

A hinge-type shutter member which is pushed by a nozzle tip of a refueling gun to open an insertion hole, and a shutter which comes into contact with the closed shutter member are provided on a cylindrical body disposed at a refueling port of a refueling pipe. A packing, a seal packing for sealing a gap between the outer periphery of the nozzle of the refueling gun and the insertion hole, and a detachably fixed to a peripheral wall portion of the body on the atmosphere side, which serves as an insertion guide for a nozzle tip of the refueling gun. And a guide member, wherein the seal packing is sandwiched and fixed between an insertion hole of the body and a holding portion of the guide member facing the insertion hole.

With such a configuration, the seal packing can be replaced by removing the guide member from the body.

A hinge type shutter member which is pushed by a nozzle tip of a refueling gun to open an insertion hole portion, and a shutter which abuts on the closed shutter member are provided on a cylindrical body arranged at a refueling port of a refueling pipe. A packing, a seal packing for sealing a gap between the outer periphery of the nozzle of the refueling gun and the insertion hole, and a detachably fixed to a peripheral wall portion of the body on the atmosphere side, which serves as an insertion guide for a nozzle tip of the refueling gun. And a guide member, wherein the seal packing is provided on the guide member.

With this configuration, when the guide member is removed from the body, the seal packing is also removed at the same time, so that the seal member can be easily replaced.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIG. 1 is an explanatory sectional view of a fuel supply pipe device KS1 according to a first embodiment. The refueling pipe device KS1 is provided with a refueling port 2 of a refueling pipe 200 connected to a fuel tank of a vehicle (not shown) for the purpose of preventing fuel vapor such as gasoline from diverging during refueling.
01.

The oil supply pipe device KS1 has a substantially cylindrical shape, and one end of the cylindrical portion 1a of the body 1 is fitted and fixed to the oil supply port 201 of the oil supply pipe 200.

The body 1 has a flange 1b protruding radially inward at one end of the cylindrical portion 1a (on the side of the oil supply pipe 200), and the other end of the cylindrical portion 1a of the body 1 (with the oil gun 250). A filler neck 2 as a guide member is fitted and fixed to the inserted atmosphere side O) by a flange portion 2a that is folded back in the axial direction.

The filler neck 2 is provided on the inclined guide surface 2 so as to serve as an insertion guide for the nozzle tip of the refueling gun 250.
b, and an opening 2c is formed at the tip of the inclined guide surface 2b.

An opening 1c is formed in the flange 1b of the body 1 as an insertion hole into which the nozzle tip of the refueling gun 250 is inserted, and the seal packing 3 is fitted therein.

The seal packing 3 includes a lip portion 3a for sealing a gap between the nozzle tip of the refueling gun 250 inserted during refueling, and a flange portion 3b abutting against an annular seating surface 1d provided in the opening 1c. It has. The flange portion 3b of the seal packing 3 is fixed by the fixing ring 4 so as to be sandwiched between the seal packing 3 and the annular seating surface 1d.

The fixing ring 4 is fixed to the fitting portion of the body 1 by press-fitting, or the fixing ring 4
Is fixed to the body 1 by welding (heating welding or ultrasonic welding).

Further, a shutter packing 5 is fixed by a fixing ring 6 to the oil supply pipe 200 side of the flange portion 1b of the body 1. Note that the fixing ring 6 is also the fixing ring 4
It is fixed by the same method as.

The shutter 7 as a shutter member includes
It protrudes in the axial direction from the flange portion 1b (the offset amount L
2) The support portion 1e is rotated via the support arm 7a by the rotation shaft 1f at the distal end portion, and comes into contact with the shutter packing 5 to close the opening 1c. A spring 8 biases the shutter 7 in a closing direction.

Since the biasing position of the spring 8 moves to the atmosphere side O, the offset amount L2 shown in FIG.
It can be set smaller than.

FIG. 2 shows an enlarged view of the structure near the shutter 7. The shutter 7 is provided with a convex portion 7c having a side wall surface portion 7b inclined toward the center toward the atmosphere side O where the refueling gun 250 is inserted.

The shutter packing 5 has a lip portion 5a extending substantially in the axial direction and abutting on the side wall surface portion 7b.

Therefore, with the shutter 7 closed, the lip 5a comes into contact with the side wall 7b of the shutter 7.
That is, as shown in FIGS. 3A, 3B, and 3C, the biasing force of the shutter 7 causes the lip tip and the abdomen (inner peripheral surface) slightly away from the tip to be inclined by the side wall surface 7b. The diameter increases outward along the surface, and becomes a seal nip portion N (a contact portion between the shutter 7 and the lip portion 5a of the shutter packing 5 and a portion exhibiting sealing properties).

At this time, even if there is a radial component (the direction of arrow A1 in FIG. 2) in the amount of movement immediately before the shutter 7 closes, the lip portion 5a is deformed along with the movement of the side wall surface portion 7b. It is possible to prevent a decrease in sealing performance due to uneven contact of the lip portion 5a due to this. Further, when there is some backlash in the hinge portion of the shutter 7, there is also an effect of suppressing the movement of the side wall surface portion 7b in the radial direction.

Further, since it is not necessary to largely warp the lip portion 5a in advance, it is possible to improve the releasability of the lip portion 5a at the time of molding, to prevent interference with the welding horn in the welding step, and to improve the incorporation into the fixing ring 6. The productivity of the shutter packing 5 is improved.

The lip portion 5a is used to improve the followability with the side wall surface portion 7b or to make the tip of the lip stably contact the flat surface portion 7d at the bottom of the convex portion 7c of the shutter 7.
To balance with the manufacturability, it is also possible to provide an outward inclination or a tip radius at an angle smaller than the spreading angle of the side wall surface portion 7b.

The position of the seal nip portion N on the side wall surface portion 7b (in the height direction of the convex portion 7c) is determined by the lip portion 5.
The relationship between the flexural rigidity of a and the urging force of the spring 8 for urging the shutter 7 and the lip tip portion is a flat portion 7d at the bottom of the convex portion 7c.
By setting it in consideration of whether or not the contact is made, it is possible to obtain a more stable sealing property.

(Embodiment 2) FIG. 4 is an explanatory sectional view showing a configuration of an oil supply pipe device KS2 according to a second embodiment. In the oil supply pipe device KS2, the same components as those of the oil supply pipe device KS1 of the first embodiment are denoted by the same reference numerals.

The oil supply pipe device KS2 is characterized by a method of fixing the seal packing 23 for sealing the lip 23a between the outer periphery of the nozzle of the oil supply gun 250 and the insertion hole 1c of the body 1.

The filler neck 22 serving as a guide member serving as an insertion guide for the nozzle tip of the refueling gun 250 is provided on the other end side of the cylindrical portion 1a of the body 1 (the peripheral wall portion on the atmospheric side where the refueling gun 250 is inserted). The collar portion 22a folded back in the axial direction is fitted and fixed so as to cover the outside of the cylindrical portion 1a. Further, the front end portion 22a1 of the collar portion 22a is engaged with the edge portion 1a2 of the outer peripheral concave stepped portion 1a1 to prevent it from falling off.

Accordingly, the filler neck 22 is provided at the flange 2
The diameter of the tip 22a1 of 2a can be disengaged from the edge 1a2 by expanding the diameter thereof, so that it can be easily removed.

The filler neck 22 has an opening 22c at the tip of the inclined guide surface 22b, into which the tip of the nozzle of the refueling gun 250 is inserted.

An axial cylindrical portion 22d forming the opening 22c and a flange portion 22e as an engagement means extending outward at an end of the axial cylindrical portion 22d are provided, and these and a part of the inclined guide surface portion 22b. Are the holding portions 22h of the seal packing 23 provided on the guide member 22, and the bead portions 23b of the seal packing 23 are fitted and held on the outer peripheral surface of the axial cylindrical portion 22d.

On the other hand, an axial fitting portion 1h is provided on the inner peripheral side of the opening 1c of the body 1, and the holding portion 22h holding the seal packing 23 enters the position facing the axial fitting portion 1h. The outer peripheral surface of the bead portion 23b of the seal packing 23 contacts.

The seal packing 23 has a bead 23b with a predetermined fitting margin from the inner peripheral side and the outer peripheral side between the axial cylindrical portion 22d of the guide member 22 and the axial fitting portion 1h. And it will be fixed.

Therefore, even if the axial relative position between the guide member 22 and the body 1 changes, the fitting allowance of the seal packing 23 can be kept constant, and the axial fitting portion 1 can be maintained.
h, it is possible to stably maintain the sealing property.

Further, since the seal packing 23 is held by the holding portion 22h of the guide member 22, when the seal packing 23 is detached from the body 1, it can be easily removed even if the seal packing 23 is in close contact with the body 1 side. It is possible to prevent the packing 23 from falling.

In this embodiment, the seal packing 23
Is detachable from the holding portion 22h of the guide member 22, and it is possible to replace only the seal packing 23 after the guide member 22 is removed from the body 1, but the seal packing 23 is replaced with the holding portion of the guide member 22. In the case where the seal packing 23 and the guide member 22 are formed integrally with each other (for example, by baking fixation or adhesive fixation during rubber molding), it is necessary to replace the seal member 23 with the guide member 22.

[0063]

As described above, according to the present invention,
It has become possible to improve the sealability and the manufacturability of the shutter packing.

In the shutter packing, the tip of the lip and the abdomen slightly away from the tip abut against the side wall surface of the shutter member, and a stable sealing property is obtained. At this time, even if there is a radial component in the amount of movement immediately before the shutter member closes, the lip portion is deformed along with the movement of the side wall surface portion, so that the sealing property is reduced due to uneven contact of the lip portion due to turning over or the like. Can be prevented.

Since there is no need to significantly warp the lip portion, the productivity of the shutter packing is improved, such as improvement of the releasability of the lip portion during molding, prevention of interference with the welding horn in the welding step, and improvement of incorporation into the fixing ring. Is improved.

Further, by removing the guide member from the body, mounting and replacement of the seal packing can be easily performed.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view of a fuel supply pipe device according to a first embodiment of the present invention.

FIG. 2 is an explanatory sectional view showing an enlarged view of the vicinity of a shutter member of the oil supply pipe device.

FIG. 3 is a diagram illustrating a sealing state of a shutter member and a shutter packing of the oil supply pipe device.

FIG. 4 is a cross-sectional configuration explanatory view of an oil supply pipe device according to a second embodiment of the present invention.

FIG. 5 is an explanatory view of a cross-sectional configuration of a conventional oil supply pipe device.

FIG. 6 is a view for explaining a sealing state of a shutter member and a shutter packing of a conventional oil supply pipe device.

FIG. 7 is a diagram for explaining a method of welding a shutter packing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 1a Cylindrical part 1a1 Outer peripheral recessed step part 1a2 Edge part 1b Flange part 1c Opening 1d Annular seating surface 1e Supporting part 1f Rotating shaft 1h Axial fitting part 2 Filler neck (guide member) 2a Collar part 2b Inclined guide surface 2c Opening hole 3 Seal packing 3a Lip part 3b Flange part 4 Fixing ring 5 Shutter packing 5a Lip part 6 Fixing ring 7 Shutter (shutter member) 7a Support arm 7b Side wall surface part 7c Convex part 8 Spring 22 Filler neck (guide member) 22a Collar Part 22a1 Tip part 22b Inclined guide surface 22c Opening hole 22d Axial cylindrical part 22e Flange part 22h Holding part 23 Seal packing 23a Lip part 23b Bead part 200 Oil supply pipe 201 Oil supply port 250 Oil supply gun KS1, KS2 Oil supply pipe unit N seal Part O atmosphere side

Claims (3)

[Claims] A hinge-type shutter member which is disposed at a fuel supply port of a fuel supply pipe and is pushed by a nozzle tip of a fuel supply gun to open an insertion hole; a shutter packing which abuts on the closed shutter member; A seal packing for sealing a gap between the outer periphery of the nozzle of the gun and the insertion hole, wherein the shutter member includes a convex portion having a side wall surface inclined toward the atmosphere side, the shutter An oil supply pipe device characterized in that the packing includes a lip portion extending substantially in the axial direction and in contact with the side wall surface portion. 2. A hinge-shaped shutter member which is pushed by a nozzle tip of a refueling gun to open an insertion hole and a closed shutter member is provided on a cylindrical body arranged at a refueling port of a refueling pipe. A shutter gasket, a seal gasket for sealing a gap between the outer periphery of the nozzle of the refueling gun and the insertion hole, and a detachable gasket fixed to the peripheral wall of the body on the atmosphere side,
A guide member that serves as an insertion guide for a nozzle tip of a refueling gun, wherein the seal packing is provided between an insertion hole of the body and a holding portion of a guide member facing the insertion hole. An oil supply pipe device which is fixedly held. 3. A hinge-shaped shutter member, which is pushed by a nozzle tip of a refueling gun to open an insertion hole, and a closed shutter member is provided on a cylindrical body disposed at a refueling port of a refueling pipe. A shutter gasket, a seal gasket for sealing a gap between the outer periphery of the nozzle of the refueling gun and the insertion hole, and a detachable gasket fixed to the peripheral wall of the body on the atmosphere side,
A fuel supply pipe device comprising: a guide member serving as an insertion guide for a nozzle tip of a fuel supply gun; and a seal packing provided on the guide member.