JP2000301957A - Sealing device for gas filling port - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an inserted gas feed gun maintain stable sealability to provide excellent reliability. SOLUTION: A seal packing 6 is expanded from a root of a lip part 6a along an outside diameter direction, its outer circumferential end part has a freely expandable film part 6c fixed to a through hole 3 wall face, and the film part 6c is extended or contracted thereby to allow movement of the lip part 6b. Therefore, the lip part 6b supported by the film part 6c is moved following movement of a gas feed gun 16 so as to maintain stable sealability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for, for example, a filler port of a filler tube led to a fuel tank of an automobile, and is provided with a seal packing for sealing a gap with a nozzle portion of an inserted refueling gun. The present invention relates to a filler opening sealing device.

[0002]

2. Description of the Related Art Conventionally, as a fuel supply port sealing device for preventing fuel vapor (evaporative gas) in a fuel tank or a filler tube 15 connected to the fuel tank to which fuel such as gasoline or light oil is supplied from leaking, For example, there is a filler opening sealing device 101 as shown in FIG. FIG. 8A is a schematic configuration diagram showing a conventional oil filler sealing device.
(B) is a view from the tank side, and FIG. 8 (c) is a view from the atmosphere side. FIG. 8A shows an AA cross section of FIG. 8C.

[0003] The fuel filler sealing device 1 in FIG. 1 is mounted on an opening of a filler tube 115 and has a through-hole 103 into which a nozzle 116 of a fuel gun (hereinafter referred to as a fuel gun) is inserted. A fuel filler body 102 which is a shape member is provided, and a filler tube 115 is connected to the tank side T on the outer periphery of the fuel filler body 102.

[0004] The filler opening sealing device 101 comprises a filler opening body 1.
02 and the refueling gun 1 when the refueling gun 116 is inserted.
And a seal packing 106 made of a rubber-like elastic material for sealing a gap with the oil filler body 10.
2 and a shutter 1 that closes the through hole 103 when the refueling gun 116 is not inserted.
08.

FIG. 9 is a view showing the fuel filler body 102. As shown in FIG. 9A is a cross-sectional view of the fuel filler body, FIG. 9B is a view from the tank side, and FIG.
It is sectional drawing of the C line.

A fuel filler body 102 shown in FIG. 9 has a cylindrical shape and a through hole 103 penetrating from the atmosphere side A to the tank side T.
Having. In the through hole 103, a seal packing 106 and a plate 107 are mounted.

At the end A on the atmosphere side of the fuel filler body 102,
A cover 110 having a U-shaped cross section is attached (see FIG. 8). On the inner diameter side of the cover 110, a female screw 110a for a filler cap having a projecting cross section is provided (see FIG. 12), and the refueling gun 11 inserted into the female screw 110a is provided.
No. 6 hooking portion 116a is hooked.

[0008] Two O-ring grooves 102a and 102b are provided on the outer peripheral surface of the filler opening body 102 for interposing rubber-like elastic O-rings 111 and 112 between the filler tube 115 and the cover 110. ing. As a result, the O-ring 111 and the O-ring 111 are provided between the filler tube 115 and the cover 110 and the outer periphery of the fuel filler body 102.
112 intervenes to prevent leakage to the outside.

[0009] The through hole 103 of the fuel filler body 102 is for inserting the fuel gun 16 so that the atmosphere side A to which the cover 110 is attached has a large diameter and the diameter decreases toward the tank side T. , The first step 104 and the second step 1
Reference numeral 05 denotes a stepped hole.

The plate 107 is fitted to the first step portion 104 at a portion which is reduced in diameter by a tapered surface from the atmosphere side A covered by the cover 110. The second step portion 105 is further reduced in diameter by one step on the tank side T of the first step portion 104, and the seal packing 106 fixed to the plate 107 is in close contact.

The first step portion 104 has a hook hole 104a into which a claw 107a provided on the plate 107 is hooked. As shown in FIG. 9 (c), the hook hole 104a is easily manufactured by penetrating the through hole 103 in the horizontal direction and closing the outer peripheral side of the fuel filler body 102.
Four are provided for three.

On the end face of the fuel supply port body 102 on the tank side T, a shutter packing 109 is provided around the opening of the through hole 3, and a shutter 108 is provided above the opening of the through hole 3.
And a support portion 113 for supporting the

On the other hand, when the refueling gun 116 is inserted, the seal packing 10 for sealing a gap with the refueling gun 116 is provided.
6 is a fixing portion 106a positioned and closely attached to the inner periphery of the second step portion 105 of the through hole 103;
And a lip portion 106b having a wedge-shaped cross section and extending toward the tank side T while reducing the diameter from the inner diameter end of 6a. Further, the seal packing 106 is provided with a large thickness and high rigidity in order to prevent return.

The fixing portion 106a has an annular groove 106 on the inner diameter side.
d is provided, and the annular projection 107 of the plate 107 is provided.
c, the seal packing 106 is fixed to the plate 107.

The plate 107 is shown in FIG. FIG.
10A is a cross-sectional view of the plate 10, FIG. 10B is a view from the tank side T, and FIG.
FIG.

As shown in FIG. 10, the plate 107
Hook hole 104a of through hole 103 of filler port body 102
This is a ring-shaped member provided on the outer periphery with a claw 107a that is hooked on the member.

A tapered guide surface 107b is provided on the inner periphery of the center hole of the plate 107. The tapered guide surface 107b reduces the diameter from the atmosphere side A to the tank side T for guiding the refueling gun 116 to be inserted. An annular groove 10 provided in the fixing portion 106a of the seal packing 106 is provided at the T end of the plate 107 on the tank side.
An annular projection 107c that protrudes in the outer diameter direction and that engages with 6d is provided.

The claw 107a of the plate 107 projects in the outer diameter direction, and the surface on the tank side T is an inclined surface protruding from the center toward the tank side T, so that it can be easily pushed into the tank side T. Further, the portion where the claw 107a is provided is provided in a thin plate shape, and when inserted into the through hole 103, resiliently repels in the outer diameter direction.

Next, the filler port body 102 of the plate 107
A description will be given of the mounting on the. First, the plate 107 to which the seal packing 106 is fixed is pushed into the through hole 103 into the tank side T. When the pushed claw 107a is hooked into the hook hole 104a, the fixing portion 106a of the seal packing 106 is pressed in the tank side T direction by the plate 107 and compressed to a certain extent in the tank side of the second step portion 105. Close contact with T wall.

On the other hand, the shutter 108 is rotatably supported by a rotation shaft 113a supported by a support portion 113 on the tank side T side surface of the fuel filler body 102, and
02 can be in close contact with the shutter packing 109 provided around the opening of the through hole 103 on the side surface of the tank side T. The shutter 108 is urged to the atmosphere side A by a coil spring 114 wound around a rotation shaft 113a. When the refueling gun 116 is not inserted, only the urging force of the spring 114 acts on the shutter 108. , The shutter 108 is pressed against the shutter packing 109 and is in close contact therewith.

When the refueling gun 116 is inserted, the tip of the refueling gun 116 contacts the shutter 108, and when the pushing force of the refueling gun 116 exceeds the force of the spring 114 for urging the shutter 108, the shutter 108 rotates. Then, the refueling gun 116 is inserted further to the back (indicated by a two-dot chain line in FIG. 8), and the outer periphery of the refueling gun 116 is sealed with the seal packing 10.
No. 6 lip portion 106b holds the lip portion 106b closely so that refueling is possible.

As described above, the filler opening sealing device 10
Reference numeral 1 indicates that the sealed state is maintained and the evaporative gas on the tank side T is prevented from being released into the atmosphere regardless of whether the fuel gun 116 is inserted or not inserted.

In the fuel supply port sealing device 101, a pressure sensing hole or a fuel supply
There are scratches and burrs on the outer periphery, and the lip 10 of the seal packing 106 is
6b may be damaged, and the damaged and worn seal packing 6 may be replaced.

In this case, in the conventional oil filler opening sealing device 101, the plate 107 fitted to the first step portion 104 in the through hole 103 is provided detachably from the atmosphere side A.
According to the attachment and detachment of the plate 107, the plate 1
07 can also be attached and detached.

The replacement of the seal packing 106 will be specifically described. First, the claw 107a of the plate 107 is moved toward the inner diameter side and removed from the hook hole 104a. Then, from the atmosphere side A, the plate 107 and the worn seal packing 10
6 can be taken out. Then, the plate 107 to which the new seal packing 106 is fixed is pushed in, the claws 107a of the plate 107 are fitted into the hook holes 104a, and the plate 107 and the new seal packing 106 are mounted.

[0026]

However, in the case of the above-described conventional oil filler sealing device, there are the following problems.

Generally, refueling guns have various shapes as shown in FIG. FIG. 11A shows a shape in which the refueling gun 116 has the same outer diameter up to the base and a hook-like portion 116a such as a spring is provided. FIG. 11B shows a shape in which the outer diameter of the base is increased. FIG. 11C shows a shape that is bent halfway. FIG. 11D shows the hook portion 116a having a thick shape.

As shown in FIG. 12, the refueling gun is fixed by hooking the hook 116a of the refueling gun 116 on the female thread 110a of the cover 110 at the refueling port entrance when refueling, so depending on the shape of the refueling gun. The insertion angle of the gun may be greatly inclined from the axial direction. For example, the smaller the φA in the shape as shown in FIG. 11A, and the smaller the distance B in the shape as shown in FIG. 11C, the smaller the insertion angle of the refueling gun in the axial direction. And the amount of eccentricity increases. In the worst case, it is difficult to ensure the sealing performance.

Although there is a standard for the outer diameter of the refueling gun, there is a large tolerance of about 0.8 mm. In order to ensure the sealing performance, the seal packing is adjusted to the minimum diameter of the outer diameter of the refueling gun. In addition to setting the interference, it is necessary to set the guide so as to be able to be guided according to the maximum diameter of the fuel gun outer diameter in order to secure the fuel gun insertability. However, setting to be able to guide according to the maximum diameter of the refueling gun outer diameter increases the amount of eccentricity when a refueling gun having a normal or small outer diameter is inserted.

In order to cope with the large inclination and eccentricity of the insertion angle from the axial direction, it is necessary to increase the interference of the lip portion of the seal packing with the oil supply gun and to reduce the diameter of the oil supply inlet. Conceivable. However, increasing the interference increases the insertion load of the refueling gun, and reducing the diameter of the refueling port entrance requires a reexamination of the dimensions of the refueling port cap and the like.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a highly reliable lubricating oil that maintains stable sealing with respect to an inserted lubricating gun. It is to provide a mouth sealing device.

[0032]

In order to achieve the above object, according to the present invention, there is provided a fuel filler body having a through hole into which a nozzle portion of a fuel gun is inserted, and a tank side connected to a filler tube. And a seal packing having a lip portion disposed in the through hole of the fuel filler body and sealingly contacting the nozzle portion of the fuel gun, wherein the seal packing includes a wall surface of the through hole. And a stretchable film portion provided between the outer circumferential end portion and the base of the lip portion.

Therefore, since the membrane seals between the outer peripheral end and the base of the lip and supports the lip,
The lip portion can be moved by the expansion and contraction of the film portion, and the lip portion supported by the film portion can move following the refueling gun, so that stable sealing performance can be maintained.

[0034] It is preferable that a holder is provided on the inner side of the seal packing on the atmosphere side with respect to the lip portion to maintain the seal packing in a constant shape.

As a result, the seal packing is maintained in a fixed shape, and there is no gap between the lip and the nozzle of the refueling gun.

A refueling gun having a through-hole into which a nozzle portion of the refueling gun is inserted, a tank side connected to a filler tube, and a refilling gun body disposed in the through-hole of the refueling port body; A seal packing having a lip portion that comes into sealing contact with the oil supply port sealing device, wherein the seal packing is disposed so as to be circumferentially divided into the inner diameter of the seal packing on the atmosphere side with respect to the lip portion, and the seal packing has a predetermined shape. Characterized in that it is provided with a holder that can be moved in the radial direction so as to maintain

Therefore, since the holder moves in the radial direction in accordance with the outer diameter of the nozzle portion of the refueling gun, the eccentricity of the refueling gun can be prevented by the holder, and stable sealing can be maintained.

A refueling gun having a through-hole into which a nozzle portion is inserted, and a tank side connected to a filler tube, and a refueling gun nozzle disposed in the refueling-port body through-hole. A seal packing having a lip portion that makes sealing contact with the seal packing; and a guide hole that guides a nozzle portion of the refueling gun while maintaining the seal packing in a constant shape. Wherein the guide hole is provided eccentrically with respect to the center of the lip portion in accordance with the inclination of the insertion angle of the refueling gun. And

Therefore, the lip portion comes into close contact with the nozzle portion of the refueling gun in which the insertion angle at the time of refueling is inclined, so that stable sealing performance can be maintained.

[0040]

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the dimensions of the components described in this embodiment,
The materials, shapes, relative arrangements, and the like are not intended to limit the scope of the present invention only to them unless otherwise specified. Further, the same reference numerals are given to the same portions as the conventional technology, and the description thereof will be omitted, and the characteristic portions of the embodiment will be described in detail.

(First Embodiment) FIG. 1 (a) is a schematic configuration diagram showing a fuel filler opening sealing device according to a first embodiment, and FIG. FIG. 1 (c) is a view as viewed from T, and FIG. Further, FIG. 1A is a view taken along the line AA in FIG.
It shows a cross section.

The filler opening sealing device 1 shown in FIG. 1 is for preventing leakage of fuel vapor (evaporative gas) from a fuel tank to which fuel such as gasoline or light oil has been supplied or a filler tube 15 connected to the fuel tank. It is attached to the opening of the tube 15.

The filler port sealing device 1 includes a filler tube 1
The fuel supply port body 2 is a cylindrical member having a through hole 3 into which a refueling gun 16 is inserted. The filler tube 15 is provided on the tank side T on the outer periphery of the refueling port body 2. Is connected.

The filler opening sealing device 1 includes a filler opening body 2,
Nozzle part of refueling gun (hereinafter referred to as refueling gun) 16
And a seal packing 6 made of a rubber-like elastic body for sealing a gap with the oil supply gun 16 when the seal is inserted.
And a shutter 8 for closing the through hole 3 when the fuel gun 16 is not inserted.

The fuel filler body 2 has the same cylindrical shape as that described in the prior art, and has a through hole 3 penetrating from the atmosphere side A to the tank side T. The seal packing 6 and the plate 7 are mounted in the through hole 3.

A cover 10 having a U-shaped cross section is attached to the end A on the atmosphere side of the fuel filler body 2. This cover 1
A female thread 10a for a filler cap having a projecting cross section is provided on the inner diameter side of 0, so that a hook 16a of a refueling gun 16 inserted into the female thread 10a is hooked.

On the outer peripheral surface of the fuel filler body 2, two O-rings 11 and 12 made of rubber-like elastic material are interposed at portions where the filler tube 15 and the cover 10 abut.
Ring grooves 2a and 2b are provided. by this,
O-rings 11 and 12 are interposed between the filler tube 15 and the cover 10 and the outer periphery of the filler opening body 2 so as not to leak outside.

The through hole 3 of the fuel filler body 2 is
The first step portion 4 and the second step portion 5 are provided so that the atmosphere side A to which the cover 10 is attached has a large diameter and the diameter decreases toward the tank side T. It is a stepped hole.

The first step portion 4 is provided on the tank side T reduced in diameter by a tapered surface from the atmosphere side A on which the cover 10 is mounted, and the seal packing 6 and the plate 7 are fitted. Second
The step portion 5 is further reduced in diameter on the tank side T of the first step portion 4, and a gap is provided between the first step portion 4 and the seal packing 6 so that the seal packing 6 can be moved.

The first step portion 4 is provided with four hook holes 4 a for hooking the claws 7 a provided on the plate 7 with respect to the through holes 3. A relief hole 4 is provided in the upper two hook holes 4a.
b is provided.

On the end face of the fuel filler body 2 on the tank side T, a shutter packing 9 made of a rubber-like elastic material around the opening of the through hole 3 and a fixing member 19 for fixing the shutter packing 9 are provided. And a support portion 13 for supporting the shutter 9 above the opening of the through hole 3.

On the other hand, the seal packing 6 for sealing the gap with the fuel gun 16 when the fuel gun 16 is inserted includes a fixed portion 6a to which the holder 20 is fixed, and a fixed portion 6a.
A wedge-shaped lip portion 6b extending toward the tank side T while reducing the diameter from the inner diameter end of the lip portion, and a thin film washer-shaped stretchable film portion 6c extending in the outer diameter direction from the fixed portion 6a which is the root of the lip portion 6b. And an outer peripheral end of the outer periphery of the film part.

The fixing portion 6a is provided with an annular groove 6d on the inner diameter, and an annular projection 20a formed on the outer diameter of the holder 20 is engaged with the annular groove 6d, so that the holder 20 is fixed to the seal packing 6. .

The holder 20 is disposed on the atmosphere side A of the seal packing 6 to maintain the seal packing 6 in a constant shape, guide the inserted oil supply gun 16, and also has a protrusion 20c at the tank side T end. To prevent the seal packing 6 from returning.

The holder 20 has a seal packing 6
Annular projection 20 which engages with annular groove 6d provided in the inner diameter of
a and a flange portion 20 extending in the outer diameter direction at the end A on the atmosphere side
b and a projection 20c at the tank-side T end.

On the other hand, the lip portion 6b is held in close contact with the outer periphery of the refueling gun 16 to be inserted. The film part 6c is provided between the outer peripheral end and the fixed part 6a. The outer peripheral end is fixed by being sandwiched between the first step portion 4 and the plate 7, and the outer peripheral end is compressed and sandwiched to have a sealing property.

The plate 7 for compressing the membrane portion 6c of the seal packing 6 is provided with a hook hole 4a of the through hole 3 of the fuel filler body 2.
This is a ring-shaped member provided with a claw 7a on the outer periphery of the claw 7a. A tapered guide surface 7b that reduces the diameter from the atmosphere side A to the tank side T for guiding the refueling gun 16 to be inserted is provided on the inner periphery of the guide hole at the center of the plate 7. The holder 20 fixed to the seal packing 6 comes into contact with the tank side T of the plate 7.

The pawl 7a of the plate 7 projects in the outer diameter direction,
The surface of the claw 7a on the tank side T is an inclined surface with the center direction protruding toward the tank side T, so that the claw 7a can be easily pushed into the tank side T. Elastic rebound.

The attachment of the plate 7 to the filler body 2 will be described. First, the plate 7 on which the seal packing 6 is fixed is pushed into the through hole 3 toward the tank side T.
When the pushed claw 7a is hooked into the hook hole 4a, the film portion 6c of the seal packing 6 has its outer peripheral end pressed by the pressing portion 7c of the plate 7 and is compressed to some extent by the first step portion 4. Close to the tank side T wall surface.

On the other hand, the shutter 8 has a rotating shaft 13a supported by a support portion 13 on the tank-side T side surface of the fuel filler body 2.
Is rotatably supported on the tank side T of the fuel filler body 2.
The shutter packing 9 provided around the opening of the through hole 2 on the side surface can be closely contacted.

The shutter 8 is urged toward the atmosphere side A by a coil spring 14 wound around a rotating shaft 13a. When the fuel gun 16 is not inserted, only the urging force of the spring 14 is applied to the shutter 8. 8, the shutter 8 is pressed against the shutter packing 9 and is in close contact therewith.

When the refueling gun 16 is inserted, the tip of the refueling gun 16 comes into contact with the shutter 8 by being guided by the guide surface 7 b of the plate 7 and the holder 20.
When the pushing force exceeds the force of the spring 14 for urging the shutter 8, the shutter 8 rotates to the tank side T, and the refueling gun 16 is inserted further to the back (indicated by a two-dot chain line in FIG. 1). The outer periphery of the gun 16 is held in close contact with the lip portion 6b so that refueling is possible.

As described above, the refueling port sealing device 1 maintains the sealed state regardless of whether the refueling gun 16 is inserted or not inserted, and ensures that the evaporative gas on the tank side T is released into the atmosphere. Preventing. By the way, in the oil filler opening sealing device 1, the oil refueling gun 16 has a pressure sensing hole and a scratch or a burr formed on the outer periphery of the oil refueling gun 16, and the oil refueling gun 16 which slides on the seal packing 6 by inserting or removing operation. As a result, the lip portion 6b may be damaged, and the worn seal packing 6 may be replaced.

In the fuel supply port sealing device 1 of this embodiment, the plate 7 fitted to the first step portion 4 in the through hole 3 is provided detachably from the atmosphere side A. In addition, the seal packing 6, which has fixed the membrane portion 6c by the pressing portion 7c of the plate 7, can be detached.

The replacement of the seal packing 6 will be specifically described. First, the pawl 7a is moved toward the inner diameter side, removed from the hook hole 4a, and the plate 7 is taken out. In the present embodiment, since the relief holes 4b are provided for the upper two hook holes 4a, a rod-shaped jig of about φ2 to 3 is inserted into the relief holes 4b, and the jig is lowered in the center direction, so that the relief holes 4b are easily lowered. The claw 7a can be easily removed from the hook hole 4a by applying a load to the claw 7a and moving the claw 7a to the inner diameter side.

Thus, the exhausted seal packing 6 can be taken out from the atmosphere side A. Then, the new seal packing 6 is pushed in, the outer peripheral end of the seal packing 6 is sandwiched between the tank-side T wall surface of the first step portion 4 and the plate 7, and the claws 7a are fitted into the hook holes 4a for mounting.

Next, a characteristic operation of the present embodiment at the time of refueling with the refueling gun 16 inserted will be described with reference to FIG.

At the time of refueling, the hook 16 of the refueling gun 16
a on the female thread 10a of the cover 10 and
And refuel.

However, the refueling gun 16 to be inserted is
1 as described in the related art, when the hook 16a is hooked on the female screw 10a, the insertion angle of the fuel gun 16 is increased from the axial direction depending on the inserted fuel gun 16. May tilt.

In such a case, as shown in FIG.
The holder 20 for guiding the refueling gun 16 is
Is moved according to the inclination of the insertion angle of the
0, the seal packing 6 to which the holder 20 is fixed also moves.
The film portion 6c of FIG. 3 expands and contracts, thereby preventing a gap from being formed between the refueling gun 16 and the lip portion 6b.

Since the fixing portion 6a and the lip portion 6b of the seal packing 6 move in accordance with the inclination of the refueling gun 16 together with the holder 20, the lip portion 6b moves with respect to the refueling gun 16 with respect to the insertion angle and the amount of eccentricity. Can be closely related to each other.

Accordingly, it is not necessary to provide a large interference allowance for the lip portion 6b in order to enhance the sealing performance regardless of the inclination of the insertion angle of the refueling gun 16, so that the insertion load can be reduced and the diameter of the refueling port inlet can be reduced. Does not need to be reduced, and components such as caps which have been conventionally used can be used as they are.

When the angle of insertion of the refueling gun 16 is inclined, the seal packing 6 is kept in a fixed shape by the holder 20, thereby preventing a problem that the lip portion 6 b does not come into close contact with the refueling gun 16.

When the inclination and the amount of eccentricity of the fuel gun 16 are large, the flange portion 20b of the holder 20 abuts on the second step 5 to prevent the fuel gun 16 from being excessively inclined or eccentric. . Thereby, expansion and contraction of the film part 6c is suppressed, the film part 6c can withstand long-term use, and the durability of the seal packing 6 is improved.

As described above, in the present embodiment,
When the film portion 6c expands and contracts in accordance with the inclination of the refueling gun 16, the seal packing 6 follows the refueling gun and maintains stable sealing. Thereby, even when various kinds of refueling guns are used, the seal packing 6 can maintain stable sealing performance.

(Second Embodiment) FIGS. 4 and 5 show a second embodiment. In the present embodiment, the holder 2 is sandwiched between the tank-side T wall surface of the second step portion 5 of the fuel filler body 2 and the removable plate 7 together with the seal packing 6 and divided into a plurality in the circumferential direction.
The seal packing 6 follows the outer diameter of the oil supply gun 16 by moving the holder 21 in the radial direction.

Since other configurations and operations are the same as those of the first embodiment, the same components are denoted by the same reference numerals, and the description thereof will be omitted. Only the characteristic portions will be described here. .

FIG. 4 is a diagram showing a fuel supply port sealing device according to the present embodiment. FIG. 4A is a schematic configuration diagram illustrating a fuel filler opening sealing device, FIG. 4B is a diagram viewed from the tank side T, and FIG. 4C is a diagram viewed from the atmosphere side A. FIG. 4A shows a cross section taken along line AA of FIG. 4C.

In FIG. 4, the seal packing 6 is sandwiched between the plate 7 and the tank-side T wall surface of the second step portion 5 of the fuel filler body 2 together with the holder 21.
As a result, the seal packing 6 is pressed against the tank side T so as to be in close contact with the tank side T wall surface of the second step portion 5.

The seal packing 6 has a cylindrical fixing portion 6a to be compressed and fixed, and a lip portion having a wedge-shaped cross section extending further toward the tank side T while reducing its diameter from the inner diameter end of the fixing portion 6a on the tank side T. 6b, an annular groove 6d formed on the inner peripheral surface of the fixed portion 6a, and two annular support portions 6e formed at both axial ends of the outer peripheral surface of the fixed portion 6a.

The holder 21 is disposed on the inner periphery of the seal packing 6 on the atmosphere side A with respect to the lip portion 6b. The holder 21 keeps the seal packing 6 in a constant shape and guides the refueling gun 16 to be inserted.

The holder 21 has an annular projection 21a which engages with an annular groove 6d provided on the inner periphery of the seal packing 6,
A flange portion 21b extending in the outer diameter direction at the atmosphere side A end portion,
And a protrusion 21c at the end on the tank side T for preventing the seal packing 6 from returning to the atmosphere side A.

The holder 21 is divided into two parts by a cutting part 22 in the circumferential direction. The inner diameter G when connecting the divided holders 21 with the cut portions 22 abutting on each other without any gap is set in accordance with the outer diameter of the fuel supply gun having the smallest diameter.

The holder 21 is provided movably in the radial direction. When the refueling gun 16 is not inserted, the holder 21 divided by being urged in the radial direction by the fixing portion 6a is held at a diameter corresponding to the minimum diameter refueling gun with which the cutting portion 22 abuts. You.

That is, the insertion of the refueling gun 16 allows the holder 21 to move in the outer diameter direction, and reduces the restoring force in the inner diameter direction in order to return to a state where the holder 21 is maintained at a diameter corresponding to the minimum diameter refueling gun. Have. Therefore, when the inserted refueling gun 16 is taken out, the holder 21 is restored to the diameter corresponding to the minimum diameter refueling gun.

On the other hand, the plate 7 presses the seal packing 6 and the holder 21 against the tank side T, and has a claw 7a and a guide surface 7b as in the first embodiment. The tank side T of the plate 7 is flat so that the holder 21 can easily move in the radial direction.

The attachment and detachment of the plate 7 is performed in the same manner as in the first embodiment. Also in this embodiment, the first step portion 4 is provided with the escape hole 4b, and the jig is inserted into the escape hole 4b so that the engagement of the claw 7a can be easily released, so that the plate 7 can be easily removed. I have to.

Next, a characteristic operation of the present embodiment at the time of refueling with the refueling gun 16 inserted will be described with reference to FIG.

Although there is a standard for the outer diameter of the refueling gun 16, there is a tolerance of about 0.8 mm between the maximum diameter and the minimum diameter. When the oil gun 16 having a large outer diameter is inserted, as shown in FIG.
Is moved in the outer diameter direction according to the outer diameter of the refueling gun 16 so as to be pushed and spread by the refueling gun 16 to be inserted, and guides the refueling gun 16.

At this time, the cutting portion 22 is expanded by the movement of the holder 21 in the outer diameter direction, and a gap is formed between the divided holders 21.

Since the holder 21 moves in the outer diameter direction in accordance with the outer diameter of the refueling gun 16 in this manner, the holder 21 can guide the holder in accordance with the diameter of the refueling gun 16.
The eccentricity of the refueling gun 16 is prevented, and stable sealing is maintained.

Since both ends in the axial direction of the fixing portion 6a are supported in the outer diameter direction by the annular support portions 6e, only the center portion in the axial direction is deformed in the outer diameter direction by the movement of the holder 21. Thereby, the annular support portion 6e comes into close contact with the second step portion 5 by the movement of the holder 21.

Further, the flange portion 21b of the holder 21 abuts on the second step portion 5 to prevent the holder 21 from moving more than necessary in the outer diameter direction. Thereby, even if a large force is applied, the inclination and the amount of eccentricity of the refueling gun 16 do not increase, and deterioration of the sealing performance is prevented.

On the other hand, when the fuel gun 16 having the smallest outer diameter is inserted, as shown in FIG. 5B, the cut portion 22 of the divided holder 21 has the smallest inner diameter with no gap. Since they are equal, the holder 21 does not move in the outer diameter direction,
In the same state as when the refueling gun 16 is not inserted, the lip portion 6b holds the outer periphery of the refueling gun 16 in close contact.

As described above, in order to enhance the sealing performance regardless of the outer diameter of the refueling gun 16, the lip portion 6b of the seal packing 6 is used.
Since it is not necessary to provide a large interference, the insertion load can be reduced by reducing the interference.

As described above, in the present embodiment,
The holder 21 can be moved in the outer diameter direction according to the outer diameter dimension of the refueling gun 16. With this, holder 2
1 guides the refueling gun 16 in accordance with the outer diameter of the refueling gun 16, so that stable sealing can be maintained by following the outer diameter of the refueling gun 16.

In this embodiment, the holder 21 is
Although the shape is divided into two parts, it is easy to come off, but the structure may be further divided into many parts.

(Third Embodiment) FIGS. 6 and 7 show a third embodiment. In this embodiment, the guide hole of the plate 7 to which the seal packing 6 is fixed is not provided with the holder, and the lip portion 6b of the seal packing 6
Are eccentric downward with respect to the center.

The other configuration and operation are the same as those of the first embodiment. Therefore, the same components are denoted by the same reference numerals, and the description thereof will be omitted. Only the characteristic portions will be described here. .

FIG. 6 is a diagram showing a fuel supply port sealing device according to the present embodiment. FIG. 6A is a schematic configuration diagram illustrating a fuel filler sealing device, FIG. 6B is a diagram viewed from the tank side T, and FIG. 6C is a diagram viewed from the atmosphere side A. FIG. 6A shows an AA cross section of FIG. 6C.

In FIG. 6, the seal packing 6 is fixed to the plate 7 and is pressed against the tank side T by fitting of the plate 7 so as to be in close contact with the tank side T wall surface of the second step portion 5. .

The seal packing 6 has a cylindrical fixing portion 6a to be compressed and fixed, and a wedge-shaped lip portion extending toward the tank side while reducing the diameter from the inner diameter end of the fixing portion 6a on the tank side T. 6b, and an annular groove 6d formed on the inner peripheral surface of the fixing portion 6a.

The plate 7 has an annular projection 6d and an annular groove 6d.
, The seal packing 6 is maintained in a fixed shape, and the seal packing 6 is pressed against the tank side T.

The plate 7 has a claw 7a and a guide surface 7b.
An annular protrusion 7d which engages with an annular groove 6d provided on the inner diameter of the seal packing 6;
And a convex portion 7e at the tank-side T end for preventing return to the front.

The plate 7 has a guide hole formed in the lip portion 6.
It is provided eccentrically below the center of b by the amount of eccentricity X below in the figure. For this reason, the inner peripheral surface of the plate 7 is wider in the axial direction on the lower side than on the upper side. Also, this guide hole
It is provided in accordance with the maximum outer diameter of the refueling gun.

The mounting and dismounting of the plate 7 is performed in the same manner as in the first embodiment. Also in the present embodiment, the first step portion 4 is provided with the escape hole 4b, and the jig is inserted into the escape hole 4b so that the engagement of the claw 7a can be easily released, so that the plate 7 can be easily removed. I have to.

Next, a characteristic operation of the present embodiment at the time of refueling with the refueling gun 16 inserted will be described with reference to FIG.

At the time of refueling, the hook 16 of the refueling gun 16
a on the female thread 10a of the cover 10 and
And refuel. At the time of this fixing, since the refueling gun 16 is generally heavier on the rear end side than the front end of the inserted gun, the rear end side of the gun is lowered with the portion abutting on the seal packing 6 or the plate 7 as a fulcrum, and the hook 16a is In the lower part of the figure.

In the present embodiment, as described above,
6 corresponds to the hook 16a being hooked below the female screw 10a, and since the guide hole position of the plate 7 is aligned with the oil refueling gun 16 in which the rear end side of the gun at the time of refueling is lowered, the sealing performance is improved. Deterioration is prevented.

More specifically, as shown in FIG. 7, since the guide hole of the plate 7 is provided eccentrically below the center of the lip portion 6b by the amount of eccentricity X, as described above, When the fuel gun 16 whose rear end is lowered is hooked, the fuel gun 16 is attached to the lip 6 of the seal packing 6.
The rear end side of the gun is lowered with the portion held in b as a fulcrum, and the refueling gun 16 in this state is guided by the guide hole of the plate 7.

For this reason, the portion of the refueling gun 16 serving as a fulcrum, which is gripped by the lip portion 6b, is substantially concentric with the center of the lip portion 6b, and the lip portion 6b is located on the lower portion in FIG. And have a minimum interference Y.

Further, it is not necessary to provide a large interference of the lip portion 6b in order to enhance the sealing performance regardless of the inclination of the hooked fuel gun 16 as in the prior art. Can be reduced.

As described above, in the present embodiment,
The guide hole of the plate 7 is provided eccentrically downward in accordance with the refueling gun 16 in which the rear end side of the gun at the time of refueling is lowered and the insertion angle is inclined. As a result, the lip portion 6b comes into close contact with the refueling gun 16 in which the insertion angle at the time of refueling is inclined.
Stable sealing performance can be maintained.

If the guide hole of the plate 7 is eccentric in accordance with the direction in which the fuel gun 16 is inclined at the time of refueling, the present invention can be applied without being limited to the eccentricity of the guide hole in the downward direction.

[0115]

As described above, the seal packing comprises the outer peripheral end fixed to the wall surface of the through hole, and the stretchable film provided between the outer peripheral end and the base of the lip. By having the film portion, the film portion seals between the outer peripheral end portion and the base of the lip portion and supports the lip portion, so that the film portion expands and contracts so that the lip portion can move, and the lip supported by the film portion The part can move following the refueling gun, and can maintain a stable sealing property.

[0116] Further, by providing a holder which is disposed on the inner side of the seal packing on the atmosphere side from the lip portion and maintains the seal packing in a fixed shape, the seal packing is maintained in a fixed shape, and the lip portion and the oil supply gun are provided. There is no gap between the nozzle and the nozzle.

By providing a radially movable holder for maintaining the seal packing in a constant shape, the holder being disposed circumferentially divided on the inner diameter of the seal packing on the atmosphere side from the lip portion, the nozzle of the refueling gun is provided. Since the holder moves in the radial direction according to the outer diameter of the part, the holder can prevent eccentricity of the refueling gun, and can maintain stable sealing.

The guide hole is provided eccentrically with respect to the center of the lip portion in accordance with the inclination of the insertion angle of the refueling gun. The parts are close to each other, and stable sealing performance can be maintained.

[Brief description of the drawings]

FIG. 1 is a view showing an oil filler opening sealing device according to a first embodiment.

FIG. 2 is a diagram illustrating removal of a plate.

FIG. 3 is a diagram showing a state at the time of refueling of the fuel filler opening sealing device according to the first embodiment.

FIG. 4 is a view showing a fuel filler opening sealing device according to a second embodiment.

FIG. 5 is a diagram illustrating a state of refueling of a refueling port sealing device according to a second embodiment.

FIG. 6 is a view showing a fuel filler opening sealing device according to a third embodiment.

FIG. 7 is a diagram illustrating a state of refueling of a fuel filler opening sealing device according to a third embodiment.

FIG. 8 is a view showing a conventional oil supply port sealing device.

FIG. 9 is a view showing a conventional fuel filler body.

FIG. 10 shows a prior art plate.

FIG. 11 is a view showing a refueling gun.

FIG. 12 is a diagram showing a state of the filler opening sealing device at the time of refueling.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filler sealing device 2 Filler body 2a, 2b O-ring groove 3 Through hole 4 First step 4a Hook hole 4b Relief hole 5 Second step 6 Seal packing 6a Fixed part 6b Lip 6c Membrane 6d Ring groove 6e Annular support portion 7 Plate 7a Claw 7b Guide surface 7c Pressing portion 7d Annular protrusion 7e Convex portion 8 Shutter 9 Shutter packing 10 Cover 10a Female thread 11, 12 O-ring 13 Support portion 13a Rotating shaft 14 Coil spring 15 Filler tube 16 Oil gun 19 Fixing member 20, 21 Holder 20a, 21a Annular protrusion 20b, 21b Flange part 20c, 21c Convex part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shoji Mizumachi 4-3-1 Tsujido Shinmachi, Fujisawa-shi, Kanagawa F-term in NOK Corporation 3D038 CA22 CB01 CC14 CD14

Claims (4)

[Claims] An oil supply body having a through hole into which a nozzle portion of the oil supply gun is inserted, and a tank side connected to a filler tube; A seal packing having a lip portion that comes into sealing contact with the nozzle portion, wherein the seal packing includes an outer peripheral end fixed to the wall surface of the through hole, and an outer peripheral end fixed to the wall surface of the through hole. A filler port sealing device, comprising: a stretchable film portion provided between the base and the base. 2. The oil filler opening sealing device according to claim 1, further comprising a holder disposed on the inner diameter of the seal packing on the atmosphere side from the lip portion to maintain the seal packing in a constant shape. . 3. A fuel filler body having a through-hole into which a nozzle portion of a fuel gun is inserted, and a tank side connected to a filler tube, and disposed in the through-hole of the fuel filler body. A sealing gasket having a lip portion that comes into sealing contact with the nozzle portion, wherein: A filler port sealing device comprising a holder movable in a radial direction to maintain the shape of the filler port. 4. A refueling gun having a through-hole into which a nozzle portion of the refueling gun is inserted, the refueling port body having a tank side connected to a filler tube, and being disposed in the through-hole of the refueling port body. A seal packing having a lip for sealingly contacting the nozzle, and a guide hole for guiding the nozzle of the refueling gun while maintaining the seal packing in a fixed shape, wherein the through hole is provided on the atmosphere side of the seal packing. A plate fitted in the hole, wherein the guide hole is provided eccentrically with respect to the center of the lip portion in accordance with the inclination of the insertion angle of the fuel gun. An oil filler sealing device.