JP4563572B2 - Fuel tank filler tube - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a filler tube of a fuel tank provided with a fuel gun insertion portion into which a nozzle of a fuel gun having a sensing port of an auto-stop mechanism and a fuel vapor suction port for sucking fuel vapor is inserted.
[0002]
[Prior art]
A fuel gun insertion portion for inserting a nozzle of the fuel gun is provided at the upper end of the filler pipe extending upward from the fuel tank of the automobile toward the outside of the vehicle body. In the fuel gun insertion portion, an annular nozzle guide for facilitating insertion of the nozzle of the fuel gun and an annular seal member for preventing diffusion of fuel vapor to the atmosphere are arranged adjacent to each other in the vertical direction. The
[0003]
A cylinder that slides in the axial direction by fitting to the tip of the nozzle in order to prevent the fuel vapor from diffusing into the atmosphere by making the seal member closely contact the outer periphery of the nozzle while facilitating the insertion of the nozzle into the seal member Japanese Patent Application No. 11-299366 proposes connecting a cylindrical nozzle insertion member to the seal member and deforming the seal member radially inward in accordance with the sliding of the nozzle insertion member to closely contact the outer periphery of the nozzle. Has been.
[0004]
[Problems to be solved by the invention]
In general, the nozzle of a fuel gun is provided with a sensing port and a fuel vapor suction port. When the fuel tank is full and the fuel level in the filler tube rises, the sensing port is submerged below the fuel level. The auto-stop mechanism is activated to automatically stop the fuel supply, and the fuel vapor pushed up into the filler tube with refueling is sucked into the fuel vapor suction port to prevent diffusion to the atmosphere. Is done.
[0005]
However, as proposed in Japanese Patent Application No. 11-299366, when the tip of the nozzle formed with the sensing port and the fuel vapor suction port is inserted into the cylindrical nozzle insertion member, the fuel vapor suction port sucks it. Since fuel vapor flows at a high flow rate through a narrow gap between the nozzle insertion member and the nozzle, a large negative pressure acts on the sensing port that opens to the gap, and the fuel tank is not full, In some cases, the auto-stop mechanism malfunctions and fuel supply stops.
[0006]
The present invention has been made in view of the above circumstances, and suppresses a large negative pressure from acting on the sensing port due to the fuel vapor sucked into the fuel vapor suction port, thereby preventing the auto-stop mechanism of the fuel gun from malfunctioning. The purpose is to prevent.
[0007]
[Means for Solving the Problems]
To achieve the above object, according to the invention described in claim 1, and the fuel gun inserted portion in which the nozzle of the fuel gun with fuel vapor suction port for sucking the sensing port and fuel vapor automatic stop mechanism is inserted In the filler tube of the fuel tank provided with the tube member provided with the fuel gun insertion portion, the fuel gun insertion portion includes a cylindrical sliding support member supported on the inner peripheral surface of the tube member, and It is slidably supported on the inner peripheral surface of the sliding support member, a substantially tubular nozzle insertion member in which the nozzle of the fueling gun slides are inserted in the axial direction, with the sliding of the nozzle insertion member Te is elastically deformed, to seal between the outer periphery of the nozzle inner periphery to the fuel gun of the sliding support member above the sensing port and the fuel vapor suction port And sealing means, an opening formed so as to face the sensing port to the nozzle insertion member, the opening is formed between the outer periphery of the lower end inner periphery and the nozzle insertion member of the sliding support member a space communicating from the space to bypass the sensing port for sucking fuel vapor in the fuel vapor suction port, a fuel vapor suction passage through the inside of part of the sliding support member, said sliding support A shutter supported by the sliding support member so as to be movable between a closed position contacting each open lower end of the member and the nozzle insertion member and an open position spaced apart from each open lower end, and the shutter on the closed position side And a spring that biases the shutter against the spring by the nozzle insertion member that slides in conjunction with the fuel gun when refueling. Filler tube of the fuel tank, characterized in that it has to be forced movement to come position is proposed.
[0008]
According to the above configuration, the nozzle of the fueling gun is inserted into the substantially cylindrical nozzle insertion member that is slidably supported on the inner peripheral surface of the sliding support member, and the nozzle insertion member is slid in the axial direction. Then, the sealing means elastically deforms and seals between the inner periphery of the sliding support member and the outer periphery of the nozzle of the fuel gun above the sensing port and the fuel vapor suction port. In this state, the nozzle enters the filler tube. After the fuel is supplied, the fuel vapor pushed up from the fuel tank into the filler tube flows into the space communicating with the sensing port between the inner periphery of the lower end of the sliding support member and the outer periphery of the nozzle insertion member. to suck fuel vapor in the fuel vapor suction port while bypassing the sensing port, securely fuel vapor suction port part via a fuel vapor suction passage through the inside of the sliding support member Is prevented from diffusing to the atmosphere, and even if some fuel vapor is sucked through the nozzle insertion member, the flow rate of the fuel vapor is reduced by the opening formed to face the sensing port Thus, the generation of negative pressure is prevented. In this way, the fuel vapor sucked into the fuel vapor suction port bypasses the sensing port, or the flow velocity decreases in the vicinity of the sensing port, so that no negative pressure acts on the sensing port, and the fuel tank becomes full. Thus, the automatic stop mechanism is reliably prevented from malfunctioning before the sensing port is submerged below the fuel level.
[0009]
Further, a shutter supported by the holding member so as to be movable between a closed position contacting each open lower end of the sliding support member and the nozzle insertion member and an open position spaced apart from each open lower end, and this shutter toward the closed position side Since the shutter is forcibly moved to the open position against the spring by the nozzle insertion member that slides in conjunction with the oil gun during refueling, the filler tube oil gun insertion part The fuel vapor is prevented from diffusing outside when the nozzle of the fuel gun is not inserted.
[0010]
The sliding member 47 of the embodiment corresponds to the sliding support member of the present invention, and the second diaphragm 55 corresponds to the sealing means of the present invention.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples of the present invention shown in the accompanying drawings.
[0012]
1 to 6 show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a filler pipe oil gun insertion portion, FIG. 2 is a perspective view of a nozzle insertion member, and FIG. FIG. 4 is an operation explanatory diagram when the fueling gun is inserted deeply, FIG. 5 is a diagram showing a state when the fueling gun is refueled, and FIG. 6 is a state when the automatic stop mechanism of the fueling gun is operated. FIG.
[0013]
First, the structure of the fuel gun G provided with the auto-stop mechanism will be described with reference to FIGS.
[0014]
The fuel gun main body 12 connected to the fuel hose 11 includes a handle 13 and a nozzle 14, and an upstream first fuel passage 15 formed in the handle 13 and a downstream second fuel passage 16 formed in the nozzle 14 are provided. It is connected via a valve seat 17. An end portion of a valve shaft 19 fixed to a valve body 18 that can be seated on the valve seat 17 is connected by a pin 22 to one end of a bell crank 21 pivotally supported by a support shaft 20 at the center portion.
[0015]
A first rod 25 and a second rod 26 are arranged in series between a trigger 24 pivotally supported on the handle 13 via a support shaft 23 and the other end of the bell crank 21. The upper end of the first rod 25 that is freely supported abuts the other end of the bell crank 21 and the upper end and the lower end of the second rod 26 that can move in the front-rear direction (left-right direction in the figure) are respectively the first rod 25. It contacts the lower end and the trigger 24.
[0016]
A negative pressure chamber 28 defined by a diaphragm 27 is formed in front of the trigger 24, and the negative pressure chamber 28 communicates with a venturi 30 formed in front of the valve seat 17 via a first negative pressure passage 29. At the same time, it communicates with the sensing port 33 opened at the tip of the nozzle 14 via the second negative pressure passage 31 and the negative pressure pipe 32. The diaphragm 27 and the second rod 26 are connected by a connecting shaft 34 that is movable in the front-rear direction.
[0017]
A first fuel vapor suction passage 35 is formed on the outer periphery of the second fuel passage 16 passing through the nozzle 14 in the axial direction, and a number of fuel vapor suction ports 36 are provided at the front end of the first fuel vapor suction passage 35 (FIG. 3 and FIG. 4), and the rear end of the first fuel vapor suction passage 35 is connected to a negative pressure source (not shown) via a second fuel vapor suction passage 37 formed in the handle 13.
[0018]
Accordingly, when the oiler pulls the trigger 24, the other end of the bell crank 21 is pushed up via the second rod 26 and the first rod 25, and the valve shaft is connected to one end of the bell crank 21 that rotates clockwise around the support shaft 20. The valve body 18 pulled 19 is retracted and separated from the valve seat 17. As a result, the fuel supplied from the fuel supply hose 11 is supplied to the filler tube of the fuel tank of the automobile through the first fuel passage 15, the venturi 30 and the second fuel passage 16. At this time, the venturi 30 that generates the negative pressure communicates with the sensing port 33 through the first negative pressure passage 29, the negative pressure chamber 28, the second negative pressure passage 31, and the negative pressure pipe 32. Since it is open, the negative pressure generated by the venturi 30 does not act on the negative pressure chamber 28. Therefore, the diaphragm 27 in the negative pressure chamber 28 is held at the position shown in FIG. 5, and the valve body 18 is held at the valve open position.
[0019]
When the fuel tank becomes full due to the supply of fuel, the fuel level in the filler tube rises, and the sensing port 33 of the fuel gun G is submerged below the fuel level as shown in FIG. Thus, when the sensing port 33 is closed by the fuel, the negative pressure generated in the venturi 30 acts on the negative pressure chamber 28, the diaphragm 27 moves forward, and the second rod 26 pulled by the connecting shaft 34. Is separated from the trigger 24 and the first rod 25, the restraint of the bell crank 21 is released, so that the valve body 18 is seated on the valve seat 17 by the fuel pressure, and the auto-stop mechanism is activated to automatically supply the fuel. Stop.
[0020]
While the fuel is being supplied from the fuel gun G to the filler tube of the fuel tank as described above, the fuel vapor in the filler tube is sucked from the fuel vapor suction port 36 to the first fuel vapor suction passage 35 and the second fuel vapor suction. The air is sucked through the passage 37 and is prevented from diffusing into the atmosphere.
[0021]
Next, the structure of the oil supply gun insertion portion 42 of the filler tube 41 will be described with reference to FIGS. 1 and 2.
[0022]
An upper portion of the filler tube 41 extending upward from a fuel tank (not shown) is configured by connecting the first tube member 43 and the second tube member 44. The first tube member 43 includes a first cylindrical portion 43b having an oil supply port 43a, a first spherical guide portion 43c continuous with the first cylindrical portion 43b, and a first flange 43d continuous with the first spherical guide portion 43c. The second tube member 44 is connected to the first flange 43d of the first tube member 43 by caulking, the second spherical guide portion 44b connected to the second flange 44a, and the second spherical guide portion 44b. And a second cylindrical portion 44c. The first spherical guide portion 43c and the second spherical guide portion 44b constitute a part of the same spherical surface.
[0023]
The first swing member 45 is swingably supported on the inner surface of the first spherical guide portion 43 c of the first tube member 43. The first swing member 45 includes a third spherical guide portion 45a that slides with respect to the first spherical guide portion 43c of the first tube member 43, and a first cylindrical shape that continues to the radially outer side of the third spherical guide portion 45a. A guide portion 45b and an oil supply gun insertion guide portion 45c connected to the inner side in the radial direction of the third spherical guide portion 45a are provided. A second swing member 46 is swingably supported on the inner surface of the second spherical guide portion 44 b of the second tube member 44. The second rocking member 46 includes a fourth spherical guide portion 46a that slides with respect to the second spherical guide portion 44b of the second tube member 44, and a second cylindrical shape that continues to the radially inner side of the fourth spherical guide portion 46a. And a guide portion 46b.
[0024]
An annular diaphragm support member 48 is coupled to the upper end portion of the substantially cylindrical sliding member 47, and the outer peripheral surface of the diaphragm support member 48 is the inner periphery of the first cylindrical guide portion 45 b of the first swing member 45. Guided slidably on the surface. An annular seal support member 49 is coupled to the lower end of the sliding member 47, and the outer peripheral surface of the seal support member 49 slides on the inner peripheral surface of the second cylindrical guide portion 46 b of the second swing member 46. Guided freely. One end of the first diaphragm 50 is sandwiched and fixed between the first flange 43d of the first tube member 43 and the second flange 44a of the second tube member 44, and the other end is sandwiched between the sliding member 47 and the diaphragm support member 48. Fixed. A compression spring 51 is disposed between the second swing member 46 and the sliding member 47, and a compression spring 52 is disposed between the first swing member 45 and the diaphragm support member 48. In this way, the sliding member 47 is supported on the inner peripheral surfaces of the tube members 43 and 44. A plurality of fuel vapor guide grooves 47b extending in the axial direction are formed on the inner peripheral surface of the sliding member 47.
[0025]
As is apparent when referring to FIG. 2, the substantially cylindrical nozzle insertion member 53 extends to the upper side of the inner peripheral flange 53 a (see FIG. 1) and to the lower side of the inner peripheral flange 53 a. A spring accommodating portion 53c, a spring support portion 53d (see FIG. 1) for bridging the inner peripheral flange 53a, an outer peripheral flange 53e formed on the outer peripheral surface of the nozzle insertion portion 53b, and a nozzle insertion connected to the lower side of the outer peripheral flange 53e An opening 53f in which the portion 53b is cut out, a plurality of locking holes 53g through the outer peripheral flange 53e, and a plurality of fuel vapor through holes 53h through the outer peripheral flange 53e are provided.
[0026]
The nozzle insertion member 53 is slidably supported inside a sliding member 47 that functions as a sliding support member for the nozzle insertion member 53, and is urged upward by a spring 54. One end of the second diaphragm 55 is sandwiched and fixed between the sliding member 47 and the diaphragm support member 48, and the other end is locked in the three locking holes 53g (see FIG. 2) of the nozzle insertion member 53. It is fixed by an annular locking member 56. The second diaphragm 55 is formed with a plurality of fuel vapor passage holes 55a. A plate-like shutter 58 pivotally supported via a pin 57 on a bracket 47 a protruding from the lower end of the sliding member 47 includes a spring support portion 58 a provided on the upper surface thereof, a spring support portion 53 d of the nozzle insertion member 53, and the like. It is urged upward by a tension spring 59 disposed between them, and comes into contact with a seal member 60 fixed between the sliding member 47 and the seal support member 49.
[0027]
When the nozzle 14 of the fuel gun G is inserted into the fuel gun insertion portion 42 of the filler tube 41, the fuel vapor guide groove 47b of the sliding member 47, the fuel vapor passage hole 53h of the outer peripheral flange 53e of the nozzle insertion portion 53b, A fuel vapor suction passage 61 (see FIG. 5) for communicating the second cylindrical portion 44c of the second tube member 44 with the fuel vapor suction port 36 of the nozzle 14 of the fuel gun G through the fuel vapor passage holes 55a of the second diaphragm 55. 3 and the broken-line arrows in FIG. 4). The fuel vapor suction passage 61, part of which passes through the inside of the sliding member 47, is formed in the fuel gun insertion portion 42 so as to bypass the sensing port 33 of the fuel gun G.
[0028]
Next, the operation of the embodiment of the present invention having the above configuration will be described.
[0029]
As shown in FIG. 1, when the nozzle 14 of the fuel gun G is not inserted into the fuel gun insertion portion 42 of the filler tube 41, the sliding member 47 is biased upward by the elastic force of the compression spring 51, and The diaphragm support member 48 integrated with the sliding member 47 is stopped at the upper limit position where the diaphragm support member 48 contacts the first swing member 45. The nozzle insertion member 53 is biased upward by the spring force of the spring 54, and is stopped at the upper limit position where the outer peripheral flange 53 e abuts against the stepped portion of the sliding member 47. At this time, the shutter 58 is tensile biased upward by the resilient force of the spring 59 Ri position near the closed seated on the seal member 60, the lower end opening of the substantially cylindrical sliding member 47 and the nozzle insertion member 53 Is blocked. Further, the filler tube 41 and the upper end portion of the sliding member 47 are connected by the first diaphragm 50, whereby the second tubular portion 44 c of the second tube member 44 and the first tubular portion 43 b of the first tube member 43. And communication with the fuel vapor is prevented from spreading outside.
[0030]
As shown in FIG. 3, in order to inject fuel into the fuel tank, the nozzle 14 of the fuel gun G is inserted into the fuel gun insertion guide 45c, the second diaphragm 55, and the nozzle insertion member 53 of the first swing member 45 from the fuel inlet 43a. When the nozzle insertion member 53 is inserted and pushed in, the nozzle insertion member 53 whose inner peripheral flange 53 a is pressed against the tip of the nozzle 14 of the fuel gun G slides downward against the elastic force of the compression spring 54. To do. As a result, the shutter 58 pressed against the lower end of the nozzle insertion member 53 swings downward around the pin 57 to the open position against the elastic force of the tension spring 59, and the sliding member 47 and the nozzle insertion member 53 are moved. Open each lower end opening.
[0031]
In the state where the nozzle 14 of the fuel gun G is inserted into the fuel gun insertion portion 42 in this way, the third spherical guide portion 45a of the first swing member 45 guides the first spherical guide portion 43c of the first tube member 43. When the fourth spherical guide portion 46 a of the second swing member 46 is guided by the second spherical guide portion 44 b of the second tube member 44, the fuel supply gun insertion portion 42 is in the direction of the arrow A− with respect to the filler tube 41. It can swing within a predetermined angle range indicated by B, and the insertion angle of the fuel gun G can be freely changed.
[0032]
When the nozzle insertion member 53 slides downward due to the insertion of the nozzle 14 of the fuel gun G, the second diaphragm 55 whose other end is locked to the outer peripheral flange 53e of the nozzle insertion member 53 moves inward in the radial direction, The oil supply gun G is in close contact with the outer peripheral surface of the nozzle 14 to seal between the inner periphery of the sliding member 47 and the outer periphery of the nozzle 14 . At this time, the fuel vapor suction ports 36 that open to the nozzle 14 of the fuel gun G are positioned below the seal portion of the second diaphragm 55, and the sensing port 33 that opens to the nozzle 14 of the fuel gun G is a nozzle. It is located at the center of the opening 53f of the insertion member 53 (see the chain line in FIG. 2).
[0033]
When the supply is injected from the nozzle 14 of the fuel gun G in this state, the fuel flows into the fuel tank through the spring accommodating portion 53 c of the nozzle insertion member 53 and the second cylindrical portion 44 c of the second tube member 44. The fuel vapor pushed up into the filler tube 41 as the fuel level in the fuel tank rises is a space formed between the inner periphery of the sliding member 47 and the outer periphery of the nozzle insertion member 53 as shown in FIG. From α, fuel vapor guide grooves 47b of the sliding member 47, fuel vapor passage holes 53h of the outer peripheral flange 53e of the nozzle insertion portion 53b, and fuel vapor passage holes 55a of the second diaphragm 55 , Part of the fuel is sucked into the fuel vapor suction port 36 of the nozzle 14 of the fuel gun G through the fuel vapor suction passage 61 passing through the inside of the sliding member 47 , and diffusion to the atmosphere is prevented.
[0034]
By the way, when the fuel vapor sucked into the fuel vapor suction port 36... Flows at a high flow velocity in the vicinity of the sensing port 33 opened on the outer periphery of the nozzle 14 of the fuel gun G, a large negative pressure is generated in the sensing port 33. The negative pressure is transmitted to the negative pressure chamber 28 via the negative pressure pipe 32 shown in FIG. As a result, there is a possibility that the diaphragm 27 in the negative pressure chamber 28 is sucked and the auto-stop mechanism is activated before the fuel tank is full and the sensing port 33 is submerged below the fuel level.
[0035]
However, since the fuel vapor suction passage 61 is located away from the sensing port 33 that opens to the nozzle 14, it is possible to prevent negative pressure from being generated in the sensing port 33 due to fuel vapor flowing therethrough, and an auto-stop mechanism is unnecessary. It is possible to reliably prevent the operation.
[0036]
Part of the fuel vapor is a space α (see FIG. 3) formed between the inner periphery of the sliding member 47 and the outer periphery of the nozzle insertion member 53, an opening 53f formed in the nozzle insertion member 53, and fueling. Via the space β (see FIG. 3) formed between the outer periphery of the nozzle 14 of the gun G and the inner periphery of the nozzle insertion member 53, the fuel vapor suction port 36 opens to the outer periphery of the nozzle 14 of the fuel gun G. Although it is sucked, the opening 53f is formed in the nozzle insertion member 53 facing the sensing port 33 to sufficiently secure the flow path cross-sectional area of the fuel vapor, so that the flow velocity of the fuel vapor flowing in the vicinity of the sensing port 33 is reduced. Thus, the generation of negative pressure can be suppressed, and the automatic stop mechanism can be reliably prevented from operating unnecessarily.
[0037]
From the above, the auto-stop mechanism can be activated only when the fuel tank is full and the sensing port 33 is submerged below the fuel level (see FIG. 6).
[0038]
When the insertion amount of the nozzle 14 of the fuel gun G is small, only the nozzle insertion member 53 slides downward with respect to the sliding member 47 as shown in FIG. 3, and the sliding member 47 is the nozzle insertion member. 53, but when the insertion amount of the nozzle 14 of the refueling gun G is large, in addition to the nozzle insertion member 53 as shown in FIG. It slides downward relative to 45 and the second swing member 46. However, the actions relating to the suction of fuel vapor and the operation of the auto-stop mechanism are the same as in the case of FIG.
[0039]
Although the embodiments of the present invention have been described above, various design changes can be made without departing from the scope of the present invention.
[0040]
【The invention's effect】
As described above, according to the first aspect of the present invention, the nozzle of the fueling gun is inserted into the substantially cylindrical nozzle insertion member that is slidably supported on the inner peripheral surface of the sliding support member. When the nozzle insertion member is slid in the axial direction, the sealing means is elastically deformed and seals between the inner periphery of the sliding support member and the outer periphery of the nozzle of the fuel gun above the sensing port and the fuel vapor suction port. In this state, when fuel is supplied from the nozzle into the filler tube, the fuel vapor pushed up from the fuel tank into the filler tube is between the lower end inner periphery of the sliding support member and the outer periphery of the nozzle insertion member. after having flowed into the space communicating with the sensing port to suck fuel vapor in the fuel vapor suction port while bypassing the sensing port, a fuel vapor suction passage a portion of which passes through the inside of the sliding support member An opening formed so as to face the sensing port even if a part of the fuel vapor is sucked through the inside of the nozzle insertion member. This reduces the flow rate of the fuel vapor and prevents the generation of negative pressure. In this way, the fuel vapor sucked into the fuel vapor suction port bypasses the sensing port, or the flow velocity decreases in the vicinity of the sensing port, so that no negative pressure acts on the sensing port, and the fuel tank becomes full. Thus, the automatic stop mechanism is reliably prevented from malfunctioning before the sensing port is submerged below the fuel level.
[0041]
Further, a shutter supported by the holding member so as to be movable between a closed position contacting each open lower end of the sliding support member and the nozzle insertion member and an open position spaced apart from each open lower end, and this shutter toward the closed position side Since the shutter is forcibly moved to the open position against the spring by the nozzle insertion member that slides in conjunction with the oil gun during refueling, the oil gun insertion portion of the filler tube The fuel vapor is prevented from diffusing outside when the nozzle of the fuel gun is not inserted.
[Brief description of the drawings]
[Fig. 1] Longitudinal sectional view of filler pipe oil gun insertion part [Fig. 2] Perspective view of nozzle insertion member [Fig. 3] Illustration of operation when the oil gun is inserted shallow [Fig. 4] Oil gun inserted deep Fig. 5 is a diagram showing the state of the fuel gun during refueling. Fig. 6 is a diagram showing the state when the auto stop mechanism of the fuel gun is activated.
14 Nozzle 33 Sensing port 36 Fuel vapor suction port 42 Refueling gun insertion part
43,44 tube members
47 sliding member (sliding support member)
53 Nozzle insertion member 53f Opening 55 Second diaphragm (sealing means)
58 shutters
59 Spring 61 Fuel vapor suction passage G Refueling gun
alpha space

Claims (1)

Fuel gun insertion section nozzle (14) is inserted in sensing ports auto-stop mechanism (33) as well as fuel gun having a fuel vapor suction port (36) for sucking fuel vapor (G) and (42), inserting the fuel gun In a filler tube of a fuel tank comprising a tube member (43, 44) provided with a portion (42) ,
The oil gun insertion portion (42) includes a cylindrical sliding support member (47) supported on the inner peripheral surface of the tube member (43, 44),
As is slidably supported by the inner peripheral surface of the sliding support member (47), said substantially tubular nozzle insertion member in which the nozzle (14) slides is inserted in the axial direction of the fuel filling gun (G) ( 53)
Is elastically deformed in accordance with the sliding of the nozzle insertion member (53), the inner circumference and the oil supply of the sliding support member above the sensing port (33) and said fuel vapor suction port (36) (47) cancer sealing means for sealing between the outer peripheral of the nozzle (14) of (G) (55),
It said nozzle insert (53) into the formed opening so as to face the sensing port (33) and (53f),
A space (α) formed between the inner periphery of the lower end of the sliding support member (47) and the outer periphery of the nozzle insertion member (53) and communicating with the opening (53f);
The space (alpha) from bypassing the sensing port (33) for sucking the fuel vapor in the fuel vapor suction port (36), fuel vapor suction to pass through the inside of the part of the sliding support member (47) A passage (61);
The sliding support member (47) is movable between a closed position contacting each lower end opening of the sliding support member (47) and the nozzle insertion member (53) and an open position spaced apart from each lower end opening. A shutter (58) supported by
A spring (59) for urging the shutter (58) toward the closed position;
During refueling, the shutter (58) is forcibly moved to the open position against the spring (59) by the nozzle insertion member (53) sliding in conjunction with the refueling gun (G) . A filler tube for a fuel tank.

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