JP2020128182A - Opening/closing device of fuel tank - Google Patents

Abstract

To provide an opening/closing device of a fuel tank, in which movability of a liquid discharge valve for opening and closing a liquid discharge path of the device is secured.SOLUTION: A housing surrounding a nozzle insertion passage is provided with a first opening through which the nozzle insertion passage is opened to the atmosphere, and a cover main body to which the housing is assembled is provided with a nozzle insertion port and a second opening, opposing to the first opening, through which the passage is opened to the atmosphere. Further, a liquid discharging mechanism mounted on the housing comprises a liquid discharge port on the liquid discharge passage 48d extending from the first opening to the second opening so that the port leads to the first opening, which makes a liquid discharge valve 47 open and close the liquid discharge port. When the liquid discharge valve opens the liquid discharge port by turning a valve main body with a turning shaft as a base point, an opening restricting part contacts a portion of an upper surface of the valve main body, so as to restrict the turning of the valve main body.SELECTED DRAWING: Figure 10

Description

The present invention relates to a fuel tank opening/closing device.

A conventional fuel tank opening/closing device includes a drain valve that opens and closes a flow path in a drain passage that communicates a fuel passage with the outside of the device, as described in Japanese Patent Laid-Open No. 2004-242242. In Patent Document 1, the drainage passage is normally closed by a drainage valve to prevent dust or the like from entering from the outside. Further, if liquid such as rainwater enters the fuel passage, the entered liquid is discharged to the outside by opening the drainage passage by the drainage valve.

JP, 2017-114272, A

In the fuel tank opening/closing device described in Patent Document 1, the drainage passage forming portion projects outward from the outer body, and the protruding portion is exposed in the fuel supply chamber in which the opening/closing device is mounted. Since the drainage valve that opens and closes the drainage passage is disposed at this protruding portion, it is likely to be affected by the outside, for example, an external force due to the contact of the oil supply nozzle. In order to reduce the influence from the outside, the drain valve may be housed in the drain passage forming portion. However, the switchgear is required to be space-saving due to the restriction of the installation space in the fuel tank of the vehicle. Therefore, in the storage area of the drainage valve, the drainage valve is arranged close to the peripheral member surrounding the drainage valve. I have to do it. Then, the drainage valve that is driven to open the drainage path may enter the gap between the peripheral members surrounding the drainage valve, and the mobility of the drainage valve may be impaired. If the drain valve is left open, it is impossible to prevent dust and the like from entering from the drain path, and therefore it has been required to secure the mobility of the drain valve.

The present invention can be realized as the following modes.

(1) According to one aspect of the fuel tank opening/closing device, a fuel tank opening/closing device is provided. The fuel tank opening/closing device includes a housing having a passage peripheral wall formed so as to surround a nozzle insertion passage of a fuel supply nozzle, and a first opening formed in the passage peripheral wall to open the nozzle insertion passage to the atmosphere. A cover body in which a housing is incorporated, having a peripheral wall formed so as to surround the housing, and a second opening that is formed in the peripheral wall and faces the first opening and is open to the atmosphere, and the ceiling of the peripheral wall. The cover main body having a nozzle insertion opening of the refueling nozzle on a wall, an insertion opening opening/closing mechanism for opening and closing the nozzle insertion opening, and the cover main body attached to the housing so as to be continuous with the first opening A drainage mechanism located between the housing and a housing, wherein the drainage mechanism is a drainage passage extending from the first opening to the second opening, the drainage passage extending from the nozzle insertion passage to the first opening. And a valve body, which is provided with a drainage port for a liquid flowing toward the first opening in a continuous manner with the first opening, and is held so as to be located closer to the central axis side of the nozzle insertion passage than the valve body. A drainage valve that has a rotation axis, and opens and closes the drainage port by rotation of the valve body around the rotation axis; and a valve body of the drainage valve that closes the drainage port. When the valve body rotates to face each other and open the drainage port, the valve body comes into contact with a part of the valve body upper surface of the valve body to regulate the rotation of the valve body.
In the fuel tank opening/closing device of this aspect, when the fluid flows from the nozzle insertion passage formed by the housing toward the first opening, the liquid reaches the drain port of the drain mechanism between the cover body and the housing. To do. Then, when the drain port is opened by the drain valve, the liquid passes through the drain port and flows into the second opening of the cover body that faces the first opening of the housing. Since the second opening is formed on the peripheral wall surrounding the housing and is open to the atmosphere, the liquid flowing to the second opening can be drained from the second opening to the outside of the device without any trouble.
The drainage mechanism that participates in the liquid drainage from the first opening to the second opening is arranged between the cover body and the housing incorporated therein, that is, in the assembly region of the housing. Therefore, in the cover body, which serves as the outer body of the fuel tank opening/closing device, it is sufficient that the second wall opening to the atmosphere is formed on the peripheral wall, and it is not necessary to provide the drainage passage forming portion protruding outside the device. This makes it possible to meet the demand for space saving.
In addition to this, in the fuel tank opening/closing device of this embodiment, a drain valve that opens and closes the drain port by rotating the valve body around the pivot axis is provided with the pivot axis on the central axis side of the nozzle insertion passage. It is held by being positioned and held. The drain valve held in this way closes the drain port in the state where the liquid has not reached the drain port, and when the liquid reaches the drain port, it is pushed by the liquid and opens the drain port. At the time of opening the drainage port, the valve body rotates about the rotation axis, and when the valve opening restricting portion comes into contact with a part of the upper surface of the valve body, the rotation of the valve body is restricted. It will be stopped. In this rotation stopped state, since the valve opening restricting portion is in contact with a part of the upper surface of the valve body, it is possible to prevent the drain valve from entering the gap between the peripheral members surrounding the drain valve. As a result, according to the fuel tank opening/closing device of this aspect, the liquid that has entered the nozzle insertion passage can be reliably drained, and the mobility of the drain valve that opens the drain port can be secured.
(2) In the fuel tank opening/closing device of the above aspect, the drainage mechanism holds the rotating shaft of the drainage valve so that the valve body rotates about the rotating shaft. A holding member may be provided, and the holding member may be provided with, as the valve opening restricting portion, a convex portion protruding toward the valve body upper surface side of the valve body. In this way, holding of the drainage valve and rotation restriction by the valve opening restricting portion can be achieved by the holding member, so that the moldability and the assemblability of the member can be improved, and the convex portion can secure a part of the upper surface of the valve main body. Can be brought into contact with each other.
(3) In the fuel tank opening/closing device of the above aspect, the convex portion may be formed to extend along the liquid discharge direction of the liquid in the liquid discharge passage. With this configuration, even if a large amount of liquid flows into the drainage passage, the liquid can be guided to the second opening while being guided by the inclined surface of the convex portion extending along the drainage direction, and the drainage property is secured. it can.

The present invention can be implemented in various modes. For example, the present invention can be implemented in the form of a fuel tank having a fuel tank opening/closing device, a filler neck having a fuel tank opening/closing device, or a method of manufacturing a fuel tank opening/closing device.

It is explanatory drawing which shows the outline|summary of the oil supply apparatus containing the opening/closing apparatus of the fuel tank concerning embodiment of this invention. FIG. 3 is a perspective view schematically showing a filler neck in which the fuel tank opening/closing device according to the embodiment is incorporated. It is explanatory drawing which shows the principal part of a filler neck in sectional view along the 3-3 line of FIG. FIG. 3 is an exploded perspective view of a fuel tank opening/closing device. It is explanatory drawing which expands and shows the peripheral area of the drainage mechanism in FIG. It is explanatory drawing which shows the drainage port formation member which comprises a drainage mechanism seen from the arrow A direction in FIG. FIG. 7 is an explanatory diagram showing the drainage port forming member as viewed in the direction of arrow B in FIG. 6. It is explanatory drawing which shows the drainage valve hold|maintained by the holding member which comprises a drainage mechanism by the front view from the arrow A direction in FIG. 3, and its right side view. It is explanatory drawing which shows the holding member which comprises a drainage mechanism seen from the arrow C direction in FIG. It is explanatory drawing which shows the assembly state of the principal part of a switchgear seeing from the arrow D direction in FIG.

FIG. 1 is an explanatory diagram showing an outline of a fuel supply device FS including a fuel tank opening/closing device 20 according to an embodiment of the present invention. The refueling device FS is mounted on the vehicle and guides the fuel supplied from the refueling nozzle FN to the fuel tank FT. An arrow G indicating the vertical direction is described in each of the drawings after FIG. The fuel supply device FS includes a filler neck 100, a fuel vapor port 102, a filler pipe FP, a check valve TV, a fuel vapor tube NT, a gas release valve BV, and a mounting member FE. The filler neck 100 is mounted in the fueling chamber FR of the vehicle by the mounting member FE and receives the insertion of the fueling nozzle FN into the nozzle insertion port 104. The filler neck 100 may be attached to the oil supply chamber FR by using a disk-shaped substrate having a circular hole formed in the center thereof, into which a part of the filler neck 100 is inserted, instead of the attachment member FE shown in the figure. ..

The filler neck 100 is connected to the fuel tank FT by the filler pipe FP and the fuel vapor tube NT. Then, the filler neck 100 guides the liquid fuel such as gasoline from the refueling nozzle FN (see FIG. 1) inserted in the nozzle insertion port 104 to the fuel tank FT connected through the filler pipe FP. The filler pipe FP is, for example, a resin tube having a bellows structure at two locations, and can expand and contract and bend within a certain range. The filler pipe FP is connected to the fuel tank FT via the check valve TV. The fuel discharged from the refueling nozzle FN inserted in the nozzle insertion port 104 is guided from the check valve TV to the fuel tank FT through a fuel flow path (described later) formed by the filler neck 100 and a filler pipe FP. The check valve TV prevents the fuel from flowing back from the fuel tank FT to the filler pipe FP.

The fuel vapor tube NT has one end connected to the fuel tank FT via the gas release valve BV and the other end connected to the fuel vapor port 102 protruding from the filler neck 100. The gas release valve BV functions as a joint that connects the fuel vapor tube NT to the fuel tank FT. The air in the tank containing the fuel vapor flows into the fuel vapor tube NT from the gas release valve BV. The fuel vapor is guided to the fuel tank FT through the filler pipe FP together with the supplied fuel when refueling from the refueling nozzle FN. Hereinafter, the filler neck 100 will be described in detail.

FIG. 2 is a perspective view schematically showing a filler neck 100 in which the fuel tank opening/closing device 20 according to the embodiment is incorporated. FIG. 3 is an explanatory view showing a main part of the filler neck 100 in a sectional view along the line 3-3 in FIG. FIG. 4 is an exploded perspective view of the fuel tank opening/closing device 20. When describing the positional relationship of the members in the following description, the side close to the fuel tank FT is appropriately referred to as the “fuel tank side”, and the side close to the nozzle insertion port 104 is appropriately referred to as the “insertion side”. To call. Further, in FIG. 3, for the sake of clear illustration of the constituent members, appropriate internal constituent members are shown in a sectional end view.

As shown in FIGS. 3 and 4, the filler neck 100 includes an insertion opening opening/closing mechanism 10, an opening/closing device 20, a tank side opening/closing mechanism 30, and a drainage mechanism 40. The opening/closing device 20 includes an outer body 21 having a nozzle insertion port 104 into which a fueling nozzle FN (see FIG. 1) is inserted, an inner body 22 having a nozzle insertion passage 100N of the fueling nozzle FN, and a tank side opening/closing on the fuel tank side. An underbody 23 for assembling the mechanism 30 to the inner body 22 and a fuel passage forming portion 25 forming a fuel passage 100P for guiding the liquid fuel supplied from the refueling nozzle FN to the fuel tank FT are provided. Each body has a substantially cylindrical shape.

The outer body 21 is a cover body in which the inner body 22 is incorporated, and has a second opening 42 that is open to the atmosphere in a peripheral wall 21 a that surrounds the inner body 22. The second opening 42 faces a first opening 41 of the inner body 22 described later. Further, the outer body 21 has a nozzle insertion opening 104 of the fuel supply nozzle FN on the ceiling wall 21b of the peripheral wall 21a. The nozzle insertion port 104 is formed so that the tapered nozzle insertion side peripheral wall 104t is continuous with the oil supply port peripheral wall 104s having a substantially circular hole shape. The outer body 21 is a resin molded product using an oil resistant resin such as PA (polyamide).

The inner body 22 is a housing having a first opening 41 in a passage peripheral wall 22a surrounding the nozzle insertion passage 100N, and the first opening 41 opens the nozzle insertion passage 100N to the atmosphere. As shown in FIGS. 3 and 4, in the inner body 22, a partial region of the passage peripheral wall 22a is a protruding wall portion 22b that protrudes outward along the radial direction of the nozzle insertion passage 100N. Then, in the inner body 22, the first opening 41 formed in the protruding wall portion 22b is continuous with the nozzle insertion passage 100N, and the passage peripheral wall 22a on the opening bottom side of the first opening 41 is the inclined wall portion 22c. The inner body 22 has a plurality of ribs between the upper and lower flanges of the body in order to reinforce the passage peripheral wall 22a, and also has a protruding piece on the lower flange for exerting a holding force with respect to the outer body 21. Since these members are not directly related to the gist of the present invention, description thereof will be omitted.

The inclined wall portion 22c has a mounting posture in which the filler neck 100 has been mounted on the vehicle, and more specifically, as shown in FIG. 3, a slanting posture in which the filler neck 100 is inclined at a predetermined inclination angle θ1 (30 to 50°) with respect to the vertical direction. When it is, the first opening 41 side is inclined so as to be located at least vertically below the nozzle insertion passage 100N side. The function of the inclined wall portion 22c will be described later. The inner body 22 and an underbody 23, which will be described later, are resin molded products using an oil resistant resin such as PA (polyamide). The inclination angle θ1 is the inclination angle of the central axis OL of the nozzle insertion passage 100N or the fuel passage 100P with respect to the vertical direction.

The insertion opening opening/closing mechanism 10 is arranged on the ceiling wall 21b side of the outer body 21 and opens/closes the nozzle insertion opening 104. That is, this insertion opening opening/closing mechanism 10 moves to the insertion opening open position by opening the nozzle insertion opening 104 with the insertion of the oil supply nozzle FN into the nozzle insertion opening 104, and when the oil supply nozzle FN is not inserted, the nozzle insertion The bottom of the opening of the mouth 104 is closed from the nozzle insertion passage 100N side.

The insertion opening opening/closing mechanism 10 includes an insertion opening opening/closing member 11 for opening/closing the nozzle insertion opening 104, an insertion side spring 12 fixed to the inner body 22 for urging the insertion opening opening/closing member 11 in a closing direction, and opening/closing of the insertion opening. The annular body 15 is attached to the ceiling wall 21b of the outer body 21 so as to surround the member 11. The annular body 15 is a molded product made of porous sponge rubber, reduces the impact applied to the ceiling wall 21b, and limits the outflow of fuel vapor to the atmosphere. The insertion opening opening/closing member 11 is a molded product using a material having a higher hydrophobicity than the outer body 21, for example, PPS (polyphenylene sulfide), and is formed in a disk shape having a central portion depressed toward the nozzle insertion passage 100N. There is. As shown in FIG. 4, the insertion opening opening/closing member 11 has a recessed recess 11a on its upper surface. The depressed recess 11a functions as a communication port that connects the nozzle insertion passage 100N to the atmosphere on the peripheral wall of the nozzle insertion port 104.

The insertion side spring 12 is fixed to the inner body 22 at a fixed end 12L, and is fixed to the insertion opening opening/closing member 11 at a free end opposite to the fixed end 12L. The insertion-side spring 12 rotates about the fixed end 12L within a predetermined angle range and biases the insertion opening/closing member 11 in the direction in which the fuel passage 100P is closed. Therefore, the insertion opening opening/closing member 11 closes the nozzle insertion opening 104 by being pressed against the end surface of the nozzle insertion opening 104 at the opening lower end side of the oil supply opening peripheral wall 104 s when not refueling. The insertion port opening/closing mechanism 10 may be a pair of flap valve types in which the nozzle insertion port 104 opens and closes left and right or up and down in front view of the insertion port as the fueling nozzle FN is inserted.

In relation to the insertion opening opening/closing member 11 of the insertion opening opening/closing mechanism 10 described above, the outer body 21 uses the lower end side end surface of the fuel supply opening peripheral wall 104s as the seating end surface of the insertion opening opening/closing member 11. The outer body 21 has a communication port 21c on the lower end side end surface of the fuel filler peripheral wall 104s, as shown in FIG. The communication port 21c is formed by cutting out the end surface on the lower end side of the fuel supply peripheral wall 104s. Then, the communication opening 21c overlaps with the depression recess 11a of the insertion opening opening/closing member 11 in the situation where the insertion opening opening/closing member 11 of the insertion opening opening/closing mechanism 10 closes the nozzle insertion opening 104, and the depression recess 11a. At the same time, the nozzle insertion passage 100N communicates with the atmosphere at the peripheral wall of the nozzle insertion port 104. It should be noted that either one of the recessed recess 11a and the communication port 21c may be formed, or both of them may be formed at different positions so that the nozzle insertion passage 100N is individually connected to the atmosphere on the peripheral wall of the nozzle insertion port 104. You can

The fuel passage forming portion 25 is attached to the lower end side of the outer body 21, and connects the fuel passage 100P to the nozzle insertion passage 100N of the inner body 22 with the tank side opening/closing mechanism 30 described later interposed.

As shown in FIG. 3, the tank-side opening/closing mechanism 30 is arranged at a portion where the fuel passage 100P formed by the fuel passage forming portion 25 and the nozzle insertion passage 100N are continuous, and opens/closes the nozzle insertion passage 100N on the fuel tank side. To do. The assembly target member of the tank side opening/closing mechanism 30 is the underbody 23, and the underbody 23 is liquid-tightly and airtightly attached to the outer body 21 and the inner body 22 via a seal member. The tank-side opening/closing mechanism 30 is assembled to the underbody 23 via the fuel passage forming portion 25, and the tank-side opening/closing member 31 for opening/closing the nozzle insertion passage 100N and the tank-side opening/closing member fixed to the fuel passage forming portion 25. A tank-side spring 32 for urging the member 31 in the closing direction. The tank-side opening/closing member 31 is a flap valve that prevents the liquid fuel from leaking from the fuel tank side to the insertion side. The tank-side spring 32 is fixed to the fuel passage forming portion 25 at a fixed end 32L, and is fixed to the tank-side opening/closing member 31 at a free end opposite to the fixed end 32L. The tank-side spring 32 rotates about the fixed end 32L within a predetermined angle range, and biases the tank-side opening/closing member 31 in the direction in which the nozzle insertion passage 100N is closed. The tank-side spring 32 has the fixed end 32L above the free end in the gravity direction with the tank-side opening/closing mechanism 30 closed when the filler neck 100 is mounted on the vehicle in the inclined posture shown in FIG. Are arranged as follows. The tank side opening/closing mechanism 30 includes a pressure adjusting mechanism in the tank side opening/closing member 31, and adjusts the fuel vapor pressure (tank internal pressure) in the fuel tank FT. That is, when the internal pressure of the tank becomes positive or negative than the specified pressure and the internal pressure is abnormal, the tank side opening/closing mechanism 30 releases the air in the tank to the nozzle insertion passage 100N side or the inside of the tank from the nozzle insertion passage 100N. The pressure inside the tank is adjusted by introducing air into the tank.

The drainage mechanism 40 is attached to the inner body 22 so as to be located between the outer body 21 and the inner body 22, and is continuous with the first opening 41 of the inner body 22. As shown in FIG. 4, the drainage mechanism 40 includes a rectangular annular seal body 45, a drainage port forming member 46, a drainage valve 47, and a holding member 48 from the inner body 22 side. The annular seal body 45 is a molded product of oil-resistant rubber, and receives the pressing force of the drainage port forming member 46 attached to the first opening 41 of the inner body 22 to extend the first opening 41 over its opening area. Liquid tightly seal.

FIG. 5 is an explanatory view showing a peripheral area of the drainage mechanism 40 in FIG. 3 in an enlarged sectional view. FIG. 6 is an explanatory diagram showing the drainage port forming member 46 that constitutes the drainage mechanism 40 as viewed from the direction of arrow A in FIG. FIG. 7 is an explanatory diagram showing the drainage port forming member 46 viewed from the direction of arrow B in FIG. FIG. 8 is an explanatory view showing a drainage valve 47 held by a holding member 48 constituting the drainage mechanism 40 in a front view from the direction of arrow A in FIG. 3 and a right side view thereof. As shown in FIGS. 3 and 4, the drainage port forming member 46 is attached to the first opening 41. The drainage port forming member 46 thus mounted has a drainage port 46a in a recess wall 46c protruding from the first opening 41 side toward the central axis OL side of the nozzle insertion passage 100N and recessed on the first opening 41 side. The recess wall 46c defines an area of the recess surrounded by the first opening 41 as a drainage passage 48d continuous with the second opening 42 of the outer body 21. As shown in the sectional view of FIG. 3 and the enlarged sectional view of FIG. 5, the drainage port forming member 46 surrounds the drainage port 46a with the tapered pedestal portion 46d, and the valve body of the drainage valve 47 described later. 47c is received by the upper end surface of the opening of the drainage port 46a. As shown in the cross-sectional views of FIG. 3 and FIG. 5, constituent members of a holding member 48 described later are also positioned in the drainage passage 48d, and a drainage valve 47 described later is held in the recess wall 46c. Therefore, the drainage passage 48d and the recess wall 46c will be described later together with the configurations of the holding member 48 and the drainage valve 47.

The arrow A direction in FIG. 3 coincides with the direction of the opening axis line orthogonal to the opening surface of the drainage port 46a. Therefore, in FIG. 6, a front view of the drainage port 46a is shown. As shown in FIG. 6, the drainage port 46a is an elliptical opening when viewed from the front.

As shown in FIG. 8, the drainage valve 47 that opens and closes the drainage port 46a having an elliptical opening has a rotating shaft 47a and a valve body 47c. The valve body 47c has an elliptical shape in a front view, and the length of the long side parallel to the rotation shaft 47a is longer than the length of the short side perpendicular to the rotation shaft 47a. The drainage valve 47 of this embodiment is formed such that the length of the long side parallel to the rotation shaft 47a is 1.1 to 1.5 times the length of the short side perpendicular to the rotation shaft 47a. The valve body 47c is formed. The drainage port 46a closed by the valve body 47c of the drainage valve 47 is also an elliptical opening corresponding to the elliptical shape of the valve body 47c. The drainage port 46a is located at one end on the first opening 41 side of the inclined wall portion 22c of the inner body 22 and is continuous with the inclined wall portion 22c. Therefore, the liquid that has entered the nozzle insertion passage 100N is guided from the nozzle insertion passage 100N to the inclined wall portion 22c, flows toward the first opening 41, and naturally reaches the drainage port 46a. Further, the drainage port forming member 46 has a convex portion 46b on the holding member 48 side. The protrusion 46b will be described in association with the configuration of the holding member 48 described later.

FIG. 9 is an explanatory view showing the holding member 48 constituting the drainage mechanism 40 as seen from the direction of arrow C in FIG. FIG. 10 is an explanatory view showing the assembled state of the main parts of the opening/closing device 20 as seen from the direction of arrow D in FIG. The holding member 48 has a third opening 43 in the central region of the frame body, and has a convex portion 43a at the upper end of the third opening 43, as shown in FIGS. 4 and 10. The third opening 43 is formed by extending the upper end of the opening to the upper side in FIG. 10 in order to secure a passage area for the liquid to be discharged to the outside via the drainage passage 48d. Since the third opening 43 supports a holding piece 48c described later from the third opening 43 side, the upper end side of the opening is narrowed in the left-right direction when viewed from the front, and an opening shoulder portion 48f is formed in the narrowed portion. The protrusions 43a protruding from the upper end of the third opening 43 protrude from the opening shoulders 48f on both sides thereof downward in FIG. 10, that is, toward the upper surface of the valve body 47c. Then, the convex portion 43a faces the valve body 47c of the drainage valve 47 having the drainage port 46a closed. Further, when the valve body 47c is rotated to open the drainage port 46a, the convex portion 43a abuts a part of the valve body upper surface of the valve body 47c, more specifically, a substantially central upper surface of the valve body 47c so as to contact the valve body 47c. Regulate the rotation of the. That is, the convex portion 43a functions as the valve opening restriction portion in the present invention. The convex portion 43a is shown in a sectional view in FIG. 5, and is formed so as to extend in a streak shape from the third opening 43 on the front surface side of the holding member 48 to the inner side of the opening. Since the direction from the inner side of the opening of the holding member 48 toward the third opening 43 on the front side is the drainage direction, the convex portion 43a extends along the drainage direction in the drainage passage 48d.

In addition, the holding member 48 is provided with two engaging arms 48 a protruding from the frame body of the third opening 43 toward the drainage port forming member 46. The engaging arm 48a is flexible so that the facing interval is widened, and has a pair of elongated engaging holes 48b from the engaging arm base portion to the distal end side. In the engagement arm 48a, the inner body 22 allows the convex engagement projection 22d provided on the periphery of the first opening 41, specifically, the protruding wall portion 22b surrounding the first opening 41 to enter into the engagement hole 48b. Then, it engages with this engagement protrusion 22d. That is, since the holding member 48 engages the engaging arm 48a with the engaging protrusion 22d that the inner body 22 has as the engaging portion, the engaging arm 48a functions as the engaged portion. The holding member 48 is attached to the inner body 22 so that the drainage port forming member 46 that has been attached to the first opening 41 of the inner body 22 as described above is held in this attached state. Specifically, the holding member 48 is attached to the inner body 22 so that the engagement protrusions 22d of the inner body 22 are engaged with the engagement holes 48b of the engagement arms 48a, and the drain port forming member 46 is the first member. The state of being attached to the opening 41 is maintained. In the present embodiment, the engagement hole 48b is formed by cutting out the base portion of the engagement arm 48a. Therefore, when the holding member 48 is attached to the inner body 22, the convex portion 46b of the drainage port forming member 46 described above engages with the engaging hole 48b on the base side of the holding member 48.

As shown in FIG. 9, the holding member 48 has a pair of holding pieces 48c on the drain port forming member 46 side. The holding piece 48 c is a member for holding the drainage valve 47 that opens and closes the drainage port 46 a of the drainage port forming member 46 with respect to the recess wall 46 c of the drainage port forming member 46. That is, the holding piece 48c has a curved surface portion 48e that faces the shaft surface of the rotating shaft 47a and is curved at the rotating shaft portion 48e when the drainage forming member 46 is mounted on the inner body 22 as described above. Hold 47a. The rotation shaft 47a has a columnar shape on the valve body 47c side, and has a flat portion 47b formed by cutting out the cylinder on the opposite side, that is, on the central axis OL side. The holding piece 48c receives the rotating shaft 47a of the drain valve 47 by the curved surface portion 48e on the side of the columnar portion opposite to the flat portion 47b. The curved surface portion 48e is formed so that its curvature is smaller than the curvature of the cylindrical portion of the rotating shaft 47a. The rotation shaft 47a of the drainage valve 47 is slidably held along the curved surface of the curved surface portion 48e on the side of the cylindrical portion thereof, and serves as a base point for rotation of the valve body 47c. That is, the valve body 47c is rotatable about the rotation shaft 47a, and in the process of rotation of the valve body 47c, the rotation shaft 47a is along the curved surface of the curved surface portion 48e on the cylindrical portion side. Can slide. The rotation shaft 47a is held by the holding piece 48c such that the rotation shaft 47a is located closer to the central axis OL of the nozzle insertion passage 100N than the valve body 47c.

The drainage valve 47 incorporated in the recess wall 46c of the drainage port forming member 46 and held by the pair of holding pieces 48c closes the drainage port 46a by the valve body 47c by its own weight. In this closed state, the valve body 47c of the drainage valve 47 is in contact with the opening upper end surface of the drainage port 46a in the tapered pedestal portion 46d, as shown in FIG. Further, as shown in FIGS. 5 and 6, the recess wall 46c of the drainage port forming member 46 has an inner peripheral wall 46e of the recess wall 46c when the drainage port 46a is closed. It is formed so as not to come into contact with 47a. In addition to this, as shown in FIGS. 5 and 6, the drainage port forming member 46 has a groove portion 46da on the tapered slope of the pedestal portion 46d. The groove 46da is formed by being depressed at both ends of the drainage port 46a when viewed from the front as shown in FIG. Explaining in connection with the drainage valve 47 held by the holding piece 48c as described above, the groove portion 46da is formed on the tapered slope of the pedestal portion 46d at both axial ends of the rotation shaft 47a of the drainage valve 47. Is formed by being depressed, and enlarges the non-contact area of the rotating shaft 47a with respect to the inner peripheral wall 46e of the recess wall 46c. Due to the expansion of the non-contact area, the valve main body 47c rotates about the rotation shaft 47a as a reference point without any trouble. More specifically, when the rotating shaft 47a slides along the curved surfaces of the curved surface portions 48e of the pair of holding pieces 48c on the side of the columnar portion as described above, one end side of the rotating shaft 47a And the other end side may have different sliding conditions. In this case, the rotating shaft 47a is inclined such that one end in the axial direction is closer to the tapered slope of the pedestal portion 46d than the other end is. Even if the rotating shaft 47a is tilted in this way, the end of the rotating shaft that is closer to the tapered slope of the pedestal portion 46d does not contact the inner peripheral wall 46e of the recess wall 46c due to the groove 46da. Therefore, as described above, the valve body 47c can be rotated without any trouble with the rotation shaft 47a as the base point.

On the other hand, as described above, when the liquid flows from the nozzle insertion passage 100N to the first opening 41 through the inclined wall portion 22c, the valve body 47c is pushed by this fluid and rotates about the rotation shaft 47a. Then, the drain port 46a is opened. The drainage valve 47, which is pushed by the fluid to open the drainage port 46a, rotates so that the valve body 47c approaches the convex portion 43a in the third opening 43 of the holding member 48. That is, the valve body 47c of the drainage valve 47 rotates so that the contact portion with the convex portion 43a becomes the rotation end, and the convex portion 43a functions as a stopper of the drainage valve 47 to rotate the valve body 47c. Regulate movement.

In addition, the holding member 48, as described above so as to hold the drainage forming member 46, is attached to the inner body 22, and as shown in FIG. The opening 42 is made continuous. In addition, the holding member 48 prevents the liquid flowing out of the drain port 46a from flowing in the already-described recess area of the recess wall 46c between the third opening 43 and the drain port 46a of the drain port forming member 46. The drainage passage 48d to the second opening 42 is used. In addition to this, in the process in which the holding member 48 is attached to the inner body 22 as described above, the holding member 48 is provided with the convex portion 46b of the drainage port forming member 46 in the engaging hole 48b and the engaging arm 48a. Insert from the tip side. As the attachment of the holding member 48 to the inner body 22 progresses, the convex portion 46b reaches the base side of the engagement hole 48b while remaining in the engagement hole 48b. Accordingly, the convex portion 46b functions as a positioning portion that determines the posture of the holding member 48 when the holding member 48 engages with the inner body 22. Further, the holding member 48 engages the convex portion 46b and the engaging protrusion 22d with the engaging hole 48b at different positions in the engaging hole 48b. Therefore, the protrusions 46b and the engagement protrusions 22d can be engaged with each other, and the shape of the holding member 48 can be simplified.

As shown in FIG. 10, the drain port forming member 46 and the holding member 48 are assembled and attached to the inner body 22 as described above with the drain port 46a (see FIG. 4) closed by the drain valve 47. To be done. Then, the inner body 22 is attached to the outer body 21 together with the insertion opening/closing mechanism 10 and the annular body 15 in a state where the drainage forming member 46 and the holding member 48 hold the drainage valve 47 and are so-called temporarily assembled. Incorporated. Specifically, the inner body 22 is incorporated into the outer body 21 so that the third opening 43 of the holding member 48 shown in FIG. 9 overlaps the second opening 42 of the outer body 21. That is, since it is only necessary to temporarily assemble the drainage port forming member 46 and the holding member 48, strict strength design or the like is not required for these members, and the product design can be simplified.

In the filler neck 100 having the opening/closing device 20 of the present embodiment described above, when the fluid flows from the nozzle insertion passage 100N formed by the inner body 22 toward the first opening 41, the liquid is discharged to the outer body 21 and the inner body. It reaches the drainage port 46a of the drainage mechanism 40 installed between the drain 22 and the drain 22. In this case, as shown in FIG. 3, the filler neck 100 having the opening/closing device 20 of the present embodiment has a predetermined inclination angle θ1 (30 to 50°) with respect to the vertical direction in the mounting posture that is already mounted on the vehicle. The inclined wall portion 22c is inclined so that the first opening 41 side is vertically below the nozzle insertion passage 100N side. Therefore, the opening/closing device 20 causes the liquid itself such as rainwater that has entered the nozzle insertion passage 100N from the depression 11a and the communication port 21c toward the first opening 41 by the inclined wall portion 22c inclined as described above. Is discharged using its own weight to reach the drain port 46a. In the filler neck 100 having the opening/closing device 20 of the present embodiment, the inclination angle θ2 with respect to the horizontal direction of the inclined wall portion 22c that is inclined so that the first opening 41 side is the vertically lower side, as shown in FIG. The angle was set to 2 to 5° from the direction toward the lower side. This ensures that the liquid flows from the nozzle insertion passage 100N into the first opening 41 through the inclined wall portion 22c. Therefore, the efficiency of draining the liquid that has entered the nozzle insertion passage 100N is increased. Further, even if the inclination angle θ2 of the inclined wall portion 22c is 0°, the liquid is caused to flow from the nozzle insertion passage 100N to the first opening 41 and drained due to vehicle vibration or the like, so that the inclination wall portion 22c is inclined. The angle θ2 is preferably 2 to 5° from the horizontal direction to the lower side.

In the filler neck 100 having the opening/closing device 20 of the present embodiment, when the drain valve 47 is pushed by the liquid that has reached the drain port 46a, the drain valve 47 opens the drain port 46a. Then, the liquid that has opened the drain valve 47 passes through the drain passage 48d in the recess region of the recess wall 46c, reaches the third opening 43 of the holding member 48, and then the third opening 43. To the second opening 42 of the outer body 21 continuous with the. Since the second opening 42 is formed in the peripheral wall 21 a surrounding the inner body 22 and is open to the atmosphere, the liquid flowing to the second opening 42 is discharged from the second opening 42 to the outside of the switchgear 20. It

The drainage mechanism 40 that is involved in the liquid drainage from the first opening 41 of the inner body 22 to the second opening 42 of the outer body 21 has a drainage mechanism 40 between the outer body 21 and the inner body 22 incorporated therein, that is, the inner body 22. Is only arranged in the built-in area of. Therefore, in the outer body 21 of the opening/closing device 20, it is sufficient that the peripheral wall 21a is formed with the second opening 42 that is open to the atmosphere, and it is necessary to provide a portion for forming a drainage passage for draining liquid to the outside of the device. There is no. In addition to this, in the opening/closing device 20 of the present embodiment, the drainage valve 47 opens and closes the drainage port 46a by the rotation of the valve body 47c with the pivot shaft 47a as the base point. The drainage valve 47 is held by positioning and holding the rotating shaft 47a on the side of the central axis OL of the nozzle insertion passage 100N. The drain valve 47 held in this way closes the drain port 46a in a state where the liquid has not reached the drain port 46a, and when the liquid reaches the drain port 46a, the drain valve 47 is pushed by the liquid to drain the drain port. 46a is opened. When the drainage port 46a is opened, the valve body 47c rotates about the rotation shaft 47a. When the convex portion 43a comes into contact with a part of the upper surface of the valve main body to restrict the rotation of the valve main body 47c, the valve main body 47c is brought into a rotation stop state. In this rotation stopped state, since the convex portion 43a is in contact with a part of the upper surface of the valve body, the gap between the peripheral members surrounding the drainage valve 47, specifically, both sides of the convex portion 43a shown in FIG. The valve body 47c of the drainage valve 47 does not enter the gap between the opening shoulders 48f. As a result, according to the opening/closing device 20 of the present embodiment, the liquid that has entered the nozzle insertion passage 100N can be reliably drained, and the mobility of the drain valve 47 that opens the drain port 46a is secured. it can.

The filler neck 100 having the opening/closing device 20 of the present embodiment holds the rotating shaft 47a of the drainage valve 47 by the holding member 48 so that the valve body 47c rotates about the rotating shaft 47a. The holding member 48 has a convex portion 43a protruding toward the valve body upper surface side of the valve body 47c. Therefore, according to the filler neck 100 having the opening/closing device 20 of the present embodiment, the holding member 48 can hold the drainage valve 47 and regulate the rotation by the convex portion 43a, so that the moldability and the assembling property of the member are improved. As the height increases, the convex portion 43a can surely make contact with a part of the upper surface of the valve body.

In the filler neck 100 having the opening/closing device 20 of the present embodiment, the convex portion 43a is formed in a shape extending along the liquid discharge direction of the liquid in the liquid discharge passage 48d. Therefore, according to the filler neck 100 having the opening/closing device 20 of the present embodiment, even if a large amount of liquid flows into the drainage passage 48d at one time, the liquid is guided by the inclined surface of the convex portion 43a extending along the drainage direction. Meanwhile, the liquid can be guided to the second opening 42 between the convex portion 43a and the opening shoulder portion 48f, and the drainage property can be secured.

In the filler neck 100 including the opening/closing device 20 of the present embodiment, the drainage valve 47 that opens and closes the drainage port 46a projects from the first opening 41 side toward the central axis OL side of the nozzle insertion passage 100N, and is a recessed wall. The holding piece 48c holds the drainage passage 48d in the recessed area of 46c. As the holding area of the drainage valve 47 expands from the first opening 41 side to the outer body 21 side, the built-in area of the drainage mechanism 40 expands to the outer body 21 side. In the opening/closing device 20 of the present embodiment, since the drainage valve 47 is retained in the drainage passage 48d in the recessed area of the recessed wall 46c protruding toward the center axis OL side of the nozzle insertion passage 100N, the drainage valve 47 is retained. It is possible to suppress the expansion of the built-in region of the mechanism 40. As a result, according to the filler neck 100 having the opening/closing device 20 of the present embodiment, it is possible to reliably drain the liquid that has entered the nozzle insertion passage 100N, and the outer body 21 of the opening/closing device 20 is placed outside the device. It can be prevented from protruding, or the degree of protrusion can be suppressed more reliably.

In the filler neck 100 having the opening/closing device 20 of the present embodiment, the rotating shaft 47a of the drainage valve 47 is held by the curved surface portions 48e of the pair of holding pieces 48c that are curved so as to face the shaft surface of the rotating shaft 47a. To do. Therefore, according to the filler neck 100 including the opening/closing device 20 of the present embodiment, the drainage valve 47 can be smoothly rotated about the rotation shaft 47a. Moreover, even if the rotating shaft 47a slides along the curved surfaces of the respective curved surface portions 48e of the pair of holding pieces 48c and is inclined, the rotating shaft 47a is recessed in the drainage port forming member 46 by the groove portion 46da. The inner wall 46e of the inner wall 46c is not contacted. That is, even if the rotating shaft 47a is slanted by sliding, the valve body 47c smoothly rotates about the rotating shaft 47a as a reference point without any trouble. As a result, the drainability of the liquid that has entered the nozzle insertion passage 100N is further enhanced.

In the filler neck 100 having the opening/closing device 20 of the present embodiment, in the drainage passage 48d in the recess wall 46c of the drainage port forming member 46, the drain main body 47c of the drainage valve 47 is formed by the pedestal portion 46d. It is received by the upper end surface of the opening of the mouth 46a. In addition, the filler neck 100 holds the drainage valve 47 so that the pivot shaft 47a does not contact the inner wall surface of the recess wall 46c. Therefore, according to the filler neck 100 having the opening/closing device 20 of the present embodiment, the valve main body 47c can be further smoothly rotated about the rotation shaft 47a as a base point, so that the drainage property can be further enhanced. ..

In the opening/closing device 20 of the present embodiment, the valve body 47c that rotates for opening and closing the drainage port 46a from the rotation shaft 47a located on the central axis OL side of the nozzle insertion passage 100N as a base point is rotated in a front view. The elliptical shape is such that the side perpendicular to the moving axis 47a is the short side. The valve body length in the direction perpendicular to the rotation axis 47a defines the expansion of the area in which the drainage mechanism 40 is incorporated from the central axis OL of the nozzle insertion passage 100N. In the opening/closing device 20 according to the present embodiment, the valve body length in the direction perpendicular to the rotating shaft 47a is made shorter than the valve body length in the direction parallel to the rotating shaft 47a, so that the drainage mechanism 40 is assembled. The expansion of the embedded area can be suppressed. Further, by forming the drainage port 46a into an elliptical opening corresponding to the valve body 47c, it is possible to secure an opening area that can reliably drain the liquid that has entered the nozzle insertion passage 100N. As a result, according to the filler neck 100 having the opening/closing device 20 of the present embodiment, it is possible to reliably drain the liquid that has entered the nozzle insertion passage 100N, and the outer body 21 of the opening/closing device 20 is external to the device. The protrusion can be prevented, or the degree of protrusion can be suppressed more reliably. In addition to this, according to the filler neck 100 having the opening/closing device 20 of the present embodiment, it is possible to avoid or suppress external contact with the drainage mechanism 40.

In the filler neck 100 having the opening/closing device 20 of the present embodiment, the rotating shaft 47a of the drain valve 47 is a rotating shaft having the flat portion 47b on the central axis OL side with respect to the center of the rotating shaft 47a. The expansion of the installation region of the drainage mechanism 40 from the central axis OL of the nozzle insertion passage 100N can be further suppressed by the amount of the cutout of the rotation shaft 47a to form the flat portion 47b. Therefore, according to the filler neck 100 having the opening/closing device 20 of the present embodiment, it is possible to further suppress the outer body 21 of the opening/closing device 20 from protruding to the outside of the device, and to prevent the drainage mechanism 40 from coming into contact with the outside. It can be more reliably avoided or suppressed.

In the filler neck 100 having the opening/closing device 20 of the present embodiment, the valve body 47c of the drainage valve 47 has a longer side parallel to the rotating shaft 47a than a shorter side perpendicular to the rotating shaft 47a. The elliptical shape is 1.1 to 1.5 times. Then, as described above, the inclined wall portion 22c for guiding the liquid toward the first opening 41 is provided in the inner body 22, and when the filler neck 100 is inclined and mounted on the vehicle, the first opening 41 side is It was inclined at a predetermined inclination angle θ2 (2 to 5°) with respect to the horizontal direction so as to be on the vertically lower side. Therefore, according to the filler neck 100 having the opening/closing device 20 of the present embodiment, it is possible to more reliably suppress the expansion of the built-in region of the drainage mechanism 40, and to incline the liquid that has entered the nozzle insertion passage 100N. The liquid can be reliably drained through 22c.

The filler neck 100 having the opening/closing device 20 of the present embodiment holds the drainage mechanism 40 from the outside to the inner body 22 by the outer body 21 to which the inner body 22 is attached. Therefore, according to the filler neck 100 having the opening/closing device 20 of the present embodiment, the drainage mechanism 40 can be reliably held from the outside of the device, and the drainage mechanism 40 can be prevented from being directly subjected to an external force. it can.

The filler neck 100 having the opening/closing device 20 according to the present embodiment has a posture of the holding member 48 when the engaging arm 48 a of the holding member 48 engages with the engaging protrusion 22 d of the inner body 22 on the drain port forming member 46. Has a convex portion 46b that determines Therefore, according to the filler neck 100 having the opening/closing device 20 of the present embodiment, the drainage mechanism 40 including the drainage forming member 46 and the holding member 48 can be easily assembled to the first opening 41 of the inner body 22. You can

The filler neck 100 having the opening/closing device 20 of the present embodiment includes an engagement protrusion 22d on the inner body 22, and the engagement protrusion 22d enters the engagement hole 48b and engages with the drain port forming member 46. 48a. Therefore, according to the filler neck 100 having the opening/closing device 20 of the present embodiment, the drainage mechanism 40 including the drainage forming member 46 and the holding member 48 is provided before the inner body 22 is attached to the outer body 21. In this state, the inner body 22 can be easily assembled by the first opening 41.

In the filler neck 100 having the opening/closing device 20 of the present embodiment, the fuel passage 100P that guides the liquid fuel supplied from the fueling nozzle FN to the fuel tank FT is formed by the fuel passage forming portion 25, and the fuel passage forming portion 25 is formed. The fuel passage 100P is provided in the inner body 22 via the underbody 23 so that the fuel passage 100P is continuous with the nozzle insertion passage 100N of the inner body 22. In addition to this, the opening/closing device 20 of the present embodiment has a tank-side opening/closing mechanism 30 that opens/closes the nozzle insertion passage 100N at a portion where the fuel passage 100P and the nozzle insertion passage 100N are continuous, and includes the outer body 21 and the insertion port. The opening/closing mechanism 10 has a communication port 21c for communicating the nozzle insertion passage 100N with the atmosphere on the peripheral wall of the nozzle insertion port 104, and a depressed recess 11a. Therefore, according to the opening/closing device 20 of the present embodiment, the filler neck 100 that guides the fuel supplied from the refueling nozzle FN to the fuel tank FT can be provided with the opening/closing device 20 and when the internal pressure of the fuel tank FT is abnormal. In the above, the tank side opening/closing mechanism 30 releases the valve closed state, and the air in the tank can be discharged to the atmosphere from the communication port 21c of the peripheral wall of the nozzle insertion port 104 and the recessed recess 11a of the insertion port opening/closing member 11.

The present invention can be implemented in various modes. For example, the present invention can be implemented in the form of a fuel tank having a fuel tank opening/closing device, a filler neck having a fuel tank opening/closing device, or a method of manufacturing a fuel tank opening/closing device.

Other embodiments:
In the above-described embodiment, the drain valve 47 is held by the curved surface portion 48e of the holding piece 48c facing the shaft surface of the rotating shaft 47a, but instead of the curved surface portion 48e, a concave wall surface recessed in a V-shape You may make it hold|maintain the rotating shaft 47a by a site|part.

In the above embodiment, the pedestal portion 46d that receives the valve body 47c has a tapered shape. However, the pedestal portion 46d is not limited to a tapered shape as long as the rotating shaft 47a does not contact the inner wall surface of the recess wall 46c. For example, it may be a pedestal portion 46d having an annular convex portion that is annularly raised at the opening of the drainage port 46a.

In the above-described embodiment, the valve body 47c of the drainage valve 47 has an elliptical shape whose long side is in the direction parallel to the rotation shaft 47a, but the valve body length in the direction parallel to the rotation shaft 47a does not change. The shape is not limited to the elliptical shape as long as it is longer than the valve body length in the direction perpendicular to the moving axis 47a. For example, the valve body 47c may be a rectangular valve body whose valve body length in the direction parallel to the rotation shaft 47a is longer than the valve body length in the direction perpendicular to the rotation shaft 47a.

In the above-described embodiment, the drainage port 46a is an elliptical opening corresponding to the elliptical valve body 47c, but the drain port 46a is not limited to the elliptical shape as long as it can be opened and closed by the valve body 47c. For example, the drainage port 46a may be a rectangular opening corresponding to the rectangular valve body 47c or a rectangular opening that can be opened and closed by the elliptical valve body 47c.

In the above embodiment, the drainage port forming member 46 is provided with the convex portion 46b, and the convex portion 46b is inserted into the engaging hole 48b when the holding member 48 is attached to the inner body 22, and the posture of the holding member 48 is changed. However, it is not limited to this. For example, by defining the interval between the engaging arms 48a in the holding member 48 in accordance with the dimension of the drainage port forming member 46 in the width direction, the posture when the holding member 48 is attached to the inner body 22 is determined. Good.

In the above-described embodiment, the fuel passage forming portion 25 that forms the fuel passage 100P that guides the liquid fuel supplied from the refueling nozzle FN to the fuel tank FT, and the tank side opening/closing mechanism 30 that opens and closes the nozzle insertion passage 100N are provided. However, it is not limited to this. For example, the opening/closing device 20 having only the tank side opening/closing mechanism 30 may be used. Specifically, the form as the opening/closing device 20 may be adopted instead of the form as the filler neck 100 having the tank side opening/closing mechanism 30 and the fuel passage forming portion 25 in addition to the opening/closing device 20.

The present invention is not limited to the above-described embodiments, examples, and modified examples, and can be realized in various configurations without departing from the spirit of the invention. For example, the technical features in the embodiments, examples, and modifications corresponding to the technical features in each mode described in the section of the outline of the invention are to solve some or all of the above problems, or In order to achieve some or all of the above effects, it is possible to appropriately replace or combine them. If the technical features are not described as essential in the present specification, they can be deleted as appropriate.

Reference numeral 10... Insert opening/closing mechanism, 11... Insert opening/closing member, 11a... Recessed recess, 12... Insertion side spring, 12L... Fixed end, 15... Annular body, 20... Opening/closing device, 21... Outer body, 21a... Peripheral wall, 21b... Ceiling wall, 21c... Communication port, 22... Inner body, 22a... Passage peripheral wall, 22b... Projecting wall part, 22c... Inclined wall part, 22d... Engaging protrusion, 23... Underbody, 25... Fuel passage forming part, 30... Tank side opening/closing mechanism, 31... Tank side opening/closing member, 32... Tank side spring, 32L... Fixed end, 40... Drainage mechanism, 41... First opening, 42... Second opening, 43... Third opening, 43a ... Convex part, 45... Annular seal body, 46... Drainage port forming member, 46a... Drainage port, 46b... Convex part, 46c... Recess wall, 46d... Pedestal part, 46da... Groove part, 46e... Inner peripheral wall, 47 ... Drainage valve, 47a... Rotating shaft, 47b... Flat part, 47c... Valve body, 48... Holding member, 48a... Engaging arm, 48b... Engaging hole, 48c... Holding piece, 48d... Drainage passage, 48e Curved surface part, 48f... Opening shoulder part, 100... Filler neck, 100N... Nozzle insertion passage, 100P... Fuel passage, 102... Fuel vapor port, 104... Nozzle insertion port, 104s... Oil supply port peripheral wall, 104t... Nozzle insertion side Peripheral wall, BV... Gas release valve, FE... Mounting member, FN... Refueling nozzle, FP... Filler pipe, FR... Refueling chamber, FS... Refueling device, FT... Fuel tank, NT... Fuel vapor tube, OL... Central axis, TV …Check valve

Claims (3)

A fuel tank opening/closing device (20),
A passage peripheral wall (22a) formed so as to surround the nozzle insertion passage (100N) of the oil supply nozzle (FN), and a first opening formed in the passage peripheral wall (22a) to open the nozzle insertion passage (100N) to the atmosphere. A housing (22) having (41),
A cover body (21) in which the housing (22) is incorporated, the peripheral wall (21a) being formed so as to surround the housing (22), and the first opening (41) formed in the peripheral wall (21a). ) And a second opening (42) for opening to the atmosphere, and a cover body (21) having a nozzle insertion opening (104) of the refueling nozzle (FN) in a ceiling wall (21b) of the peripheral wall (21a). )When,
An insertion opening opening/closing mechanism (10) for opening and closing the nozzle insertion opening (104);
A drainage mechanism (40) mounted on the housing (22) so as to be continuous with the first opening (41) and positioned between the cover body (21) and the housing (22). ,
The drainage mechanism (40) is
A drainage passage (48d) from the first opening (41) to the second opening (42), which is for discharging the liquid flowing from the nozzle insertion passage (100N) toward the first opening (41). A drainage passage (48d) provided with a drainage port (46a) continuous with the first opening (41);
The valve body (47c) and a rotation shaft (47a) held so as to be located closer to the central axis (OL) side of the nozzle insertion passageway (100N) than the valve body (47c), A drainage valve (47) for opening and closing the drainage port (46a) by pivoting of the valve body (47c) about a shaft (47a);
When the valve body (47c) rotates to face the valve body (47c) of the drainage valve (47) with the drainage port (46a) closed and to open the drainage port (46a), An opening/closing device (20) for a fuel tank, comprising: a valve opening restricting portion (43a) that abuts a part of an upper surface of the valve body (47c) to restrict the rotation of the valve body (47c). A fuel tank opening/closing device (20) according to claim 1,
The drainage mechanism (40) is
A holding member (48) for holding the rotating shaft (47a) of the drainage valve (47) is provided so that the valve body (47c) rotates about the rotating shaft (47a). ,
A fuel tank opening/closing device (20), wherein the holding member (48) includes, as the valve opening restricting portion (43a), a convex portion (43a) protruding toward the valve body upper surface side of the valve body (47c). The fuel tank opening/closing device (20) according to claim 2,
An opening/closing device (20) for a fuel tank, wherein the convex portion (43a) is formed so as to extend along the drainage direction of the liquid in the drainage passage (48d).

Images