JP7001032B2 - Fuel tank switchgear - Google Patents

Description

The present invention relates to a fuel tank switchgear.

As described in Patent Document 1, the conventional fuel tank switchgear is provided with a switchgear in the drainage passage that communicates the fuel passage and the outside of the device. Further, in Patent Document 1, the drainage passage is normally closed by an on-off valve to prevent the intrusion of dust and the like from the outside. Further, when a liquid such as rainwater enters the fuel passage, the liquid that has entered is discharged to the outside by opening the inside of the switchgear with an on-off valve.

Japanese Unexamined Patent Publication No. 2017-114272

In the fuel tank switchgear described in Patent Document 1, the drainage passage forming portion protrudes outward from the outer body, and the protruding portion is exposed in the refueling chamber to which the switchgear is mounted. Due to restrictions on the installation space of the switchgear in the refueling room of the vehicle and restrictions on the appearance design that the user can see each time refueling, it is possible that the formed portion of the drainage channel cannot be greatly projected from the outer body. On the other hand, if the protrusion of the drainage channel formation site is suppressed, the drainage property may be deteriorated. For these reasons, it has been required to suppress the protrusion of the outer body while ensuring the drainage property.

The present invention can be realized as the following forms.

(1) According to a form of a fuel tank switchgear, a fuel tank switchgear is provided. The fuel tank opening / closing device includes a housing having a passage peripheral wall formed so as to surround the nozzle insertion passage of the refueling nozzle, and a first opening formed on the passage peripheral wall to open the nozzle insertion passage to the atmosphere. A cover body into which a housing is incorporated, which has a peripheral wall formed so as to surround the housing and a second opening formed in the peripheral wall and open to the atmosphere facing the first opening, and the ceiling of the peripheral wall. The cover body having the nozzle insertion port of the refueling nozzle on the wall, the insertion port opening / closing mechanism for opening and closing the nozzle insertion port, and the liquid is drained from the nozzle insertion passage located between the cover body and the housing. It has a drainage mechanism for draining liquid, and the drainage mechanism is mounted on the first opening, protrudes from the first opening side toward the central axis side of the nozzle insertion port, and is recessed on the first opening side. A drainage port formation having a recessed wall in which a place is continuously formed in the second opening, and a drainage port for liquid flowing from the nozzle insertion passage toward the first opening is formed in the recessed wall. A drainage valve having a member, a rotation shaft, and a valve body, and opening and closing the drainage port by rotation of the valve body with the rotation shaft as a base point, and the rotation shaft. It includes a holding member having a holding piece to hold against the recessed wall.
In this form of fuel tank switchgear, when a 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. do. Then, when the drain port is opened by the drain valve, the liquid passes through the recess and flows to the second opening of the cover body facing 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 involved in the liquid drainage from the first opening to the second opening is arranged between the cover main body and the housing incorporated therein, that is, in the built-in area of the housing. Therefore, in the cover body which is the outer body of the fuel tank opening / closing device, it is sufficient that the peripheral wall is formed with a second opening open to the atmosphere, and it is not necessary to provide the drainage passage forming portion so as to project to the outside of the device. In addition to this, in this form of fuel tank switchgear, the drain valve that opens and closes the drain port is held by a holding piece in a recessed portion that protrudes from the first opening side toward the central axis side of the nozzle insertion port. .. As the holding area of the drainage valve expands from the first opening side to the cover body side, the built-in area of the drainage mechanism expands to the cover body side. In this form of the fuel tank opening / closing device, since the drain valve is held in the recessed portion protruding toward the central axis side of the nozzle insertion port, it is possible to suppress the expansion of the built-in area of the drain mechanism. As a result, according to this type of fuel tank opening / closing device, the liquid that has entered the nozzle insertion passage can be reliably drained, and the cover body, which is the outer body of the opening / closing device, does not protrude to the outside of the device. Or, the degree of protrusion can be suppressed more reliably.
(2) In the fuel tank opening / closing device of the above-described embodiment, the holding piece may hold the rotating shaft at a curved surface portion facing the shaft surface of the rotating shaft. By doing so, the valve body can be smoothly rotated around the rotation shaft, so that the drainage property can be improved.
(3) In the fuel tank opening / closing device of the above-described embodiment, the drainage port forming member has the valve body on the opening of the drainage port so that the rotation shaft does not come into contact with the inner wall surface of the recessed wall. It may have a pedestal portion that receives it at the end face. By doing so, the valve body can be rotated more smoothly with the rotation shaft as the base point, so that the drainage property can be further improved.

The present invention can be realized in various aspects. For example, it can be realized in the form of a fuel tank having a fuel tank opening / closing device, a form of a filler neck having a fuel tank opening / closing device, a method of manufacturing a fuel tank opening / closing device, and the like.

It is explanatory drawing which shows the outline of the refueling apparatus which includes the opening / closing device of the fuel tank which concerns on embodiment of this invention. It is a perspective view which made a schematic view of the filler neck which incorporated the opening / closing device of the fuel tank which concerns on embodiment. It is explanatory drawing which shows the main part of the filler neck in cross-sectional view along line 3-3 of FIG. It is an exploded perspective view of the opening / closing device of a fuel tank. It is explanatory drawing which shows the peripheral area of the drainage mechanism in FIG. 3 in the enlarged cross-sectional view. It is explanatory drawing which shows the drainage port forming member constituting the drainage mechanism as seen from the direction of arrow A in FIG. It is explanatory drawing which shows the drainage port forming member as seen from the direction of arrow B in FIG. It is explanatory drawing which shows the drainage valve held by the holding member constituting the drainage mechanism by the front view from the direction of arrow A in FIG. 3 and the right side view thereof. It is explanatory drawing which shows the holding member constituting the drainage mechanism as seen from the direction of arrow C in FIG. It is explanatory drawing which shows the assembling state of the main part component of a switchgear as seen from the direction of arrow D in FIG.

FIG. 1 is an explanatory diagram showing an outline of a refueling 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. In each of the figures after FIG. 1, an arrow G indicating a vertical direction is described. The refueling 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, an outgassing valve BV, and a mounting member FE. The filler neck 100 is mounted in the refueling chamber FR of the vehicle by the mounting member FE, and accepts the insertion of the refueling nozzle FN into the nozzle insertion port 104. Instead of the mounting member FE shown in the figure, the filler neck 100 may be mounted on the refueling chamber FR by using a disk-shaped substrate having a circular hole in which a part of the filler neck 100 is inserted in the center. ..

The filler neck 100 is connected to the fuel tank FT by a filler pipe FP and a 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 into the nozzle insertion port 104 to the fuel tank FT connected via the filler pipe FP. The filler pipe FP is, for example, a resin tube having a bellows structure at two positions, and can be expanded and contracted and curved 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 into the nozzle insertion port 104 is guided to the fuel tank FT from the check valve TV via the fuel flow path and the filler pipe FP described later formed by the filler neck 100. The check valve TV prevents the backflow of fuel from the fuel tank FT to the filler pipe FP.

One end of the fuel vapor tube NT is connected to the fuel tank FT via the gas discharge valve BV, and the other end is connected to the fuel vapor port 102 protruding from the filler neck 100. The outgassing 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 at the time of refueling from the refueling nozzle FN. Hereinafter, the filler neck 100 will be described in detail.

FIG. 2 is a perspective view schematically showing the 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 cross-sectional view along the line 3-3 of FIG. FIG. 4 is an exploded perspective view of the fuel tank opening / closing device 20. In the following description, when the positional relationship of the members is described, 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". Refer to. Further, in FIG. 3, for the purpose of clearly showing the constituent members, appropriate internal constituent members are shown in a cross-sectional end view.

As shown in FIGS. 3 and 4, the filler neck 100 includes an insertion port 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 has an outer body 21 having a nozzle insertion port 104 into which a refueling nozzle FN (see FIG. 1) is inserted, an inner body 22 having a nozzle insertion passage 100N of the refueling 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 for 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 into which the inner body 22 is incorporated, and has a second opening 42 open to the atmosphere in the peripheral wall 21a surrounding the inner body 22. The second opening 42 faces the first opening 41 of the inner body 22 described later. Further, the outer body 21 has a nozzle insertion port 104 for a refueling 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 fuel filler 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 the passage peripheral wall 22a surrounding the nozzle insertion passage 100N, and the nozzle insertion passage 100N is opened to the atmosphere by the first opening 41. As shown in FIGS. 3 and 4, the inner body 22 is a protruding wall portion 22b in which a part of the passage peripheral wall 22a is projected outward along the radial direction of the nozzle insertion passage 100N. On the inner body 22, the first opening 41 formed in the protruding wall portion 22b is made continuous with the nozzle insertion passage 100N, and the passage peripheral wall 22a on the opening bottom side of the first opening 41 is used as 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 on the outer body 21. Since these members are not directly related to the gist of the present invention, the description thereof will be omitted.

The inclined wall portion 22c has a mounting posture in which the filler neck 100 is already mounted on the vehicle, and more specifically, as shown in FIG. 3, an inclined posture in which the filler neck 100 is inclined at a predetermined inclination angle θ1 (30 to 50 °) with respect to the vertical direction. The first opening 41 side is inclined so as to be located at least vertically downward from the nozzle insertion passage 100N side. The function of the inclined wall portion 22c will be described later. The inner body 22 and the underbody 23 described later are resin molded products using an oil resistant resin such as PA (polyamide). The inclination angle θ1 is an 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 port opening / closing mechanism 10 is arranged on the ceiling wall 21b side of the outer body 21 to open / close the nozzle insertion port 104. That is, the insertion port opening / closing mechanism 10 moves to the insertion port open position along with the insertion of the refueling nozzle FN into the nozzle insertion port 104 to open the nozzle insertion port 104, and inserts the nozzle when the refueling nozzle FN is not inserted. The bottom of the opening of the mouth 104 is closed from the nozzle insertion passage 100N side.

The insertion port opening / closing mechanism 10 includes an insertion port opening / closing member 11 for opening / closing the nozzle insertion port 104, an insertion side spring 12 fixed to the inner body 22 and urging the insertion port opening / closing member 11 in the closing direction, and an insertion port opening / closing mechanism 10. An annular body 15 mounted on the ceiling wall 21b of the outer body 21 so as to surround the member 11 is provided. The annular body 15 is a molded product of porous sponge rubber, which cushions 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 the central portion is formed in a disk shape recessed on the nozzle insertion passage 100N side. There is. As shown in FIG. 4, the insertion opening opening / closing member 11 is provided with a recessed portion 11a on the upper surface thereof. The recessed portion 11a functions as a communication port for communicating the nozzle insertion passage 100N with 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 around the fixed end 12L within a range of a predetermined angle, and urges the insertion port opening / closing member 11 in the direction in which the fuel passage 100P closes. Therefore, the insertion port opening / closing member 11 is pressed against the end surface on the lower end side of the opening of the refueling port peripheral wall 104s in the nozzle insertion port 104 during non-lubricating, and closes the nozzle insertion port 104. The insertion port opening / closing mechanism 10 may be a pair of flap valve types in which the nozzle insertion port 104 opens / closes left / right or up / down when the refueling 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 filler 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 port peripheral wall 104s, as shown in FIG. The communication port 21c is formed by cutting out the lower end side end surface of the fuel filler port peripheral wall 104s. The communication port 21c overlaps with the recessed portion 11a of the insertion port opening / closing member 11 in the situation where the insertion port opening / closing member 11 of the insertion port opening / closing mechanism 10 described above closes the nozzle insertion port 104, and the communication port 21c overlaps with the recessed portion 11a. At the same time, the nozzle insertion passage 100N is communicated with the atmosphere at the peripheral wall of the nozzle insertion port 104. Either one of the recessed portion 11a and the communication port 21c may be formed, and the two are formed at different positions so that the nozzle insertion passage 100N individually communicates with the atmosphere at the peripheral wall of the nozzle insertion port 104. You may do it.

The fuel passage forming portion 25 is assembled on the lower end side of the outer body 21, and the fuel passage 100P is continuously connected to the nozzle insertion passage 100N of the inner body 22 via the tank side opening / closing mechanism 30 described later.

As shown in FIG. 3, the tank side opening / closing mechanism 30 is arranged at a position where the fuel passage 100P formed by the fuel passage forming portion 25 and the nozzle insertion passage 100N are continuous, and the nozzle insertion passage 100N is opened / closed on the fuel tank side. do. The assembly target member of the tank side opening / closing mechanism 30 is an 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 is fixed to the tank-side opening / closing member 31 that opens / closes the nozzle insertion passage 100N and the fuel passage forming portion 25 to open / close the tank side. A tank-side spring 32 that urges the member 31 in the closing direction is provided. The tank side opening / closing member 31 is a flap valve that prevents 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 around the fixed end 32L within a predetermined angle range, and urges the tank-side opening / closing member 31 in the direction in which the nozzle insertion passage 100N closes. When the filler neck 100 is already mounted on the vehicle in the inclined posture shown in FIG. 3, 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. It is arranged like this. The tank-side opening / closing mechanism 30 is provided with a pressure adjusting mechanism in the tank-side opening / closing member 31, and regulates the fuel vapor pressure (tank internal pressure) in the fuel tank FT. That is, when the internal pressure in the tank becomes positive or negative than the specified pressure, the tank side opening / closing mechanism 30 discharges the air in the tank to the nozzle insertion passage 100N side or from the nozzle insertion passage 100N into the tank. The pressure inside the tank is adjusted by introducing the 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 is subjected to the pressing force of the drainage port forming member 46 mounted on the first opening 41 of the inner body 22 to extend the first opening 41 over the opening region thereof. Seal tightly.

FIG. 5 is an explanatory view showing an enlarged cross-sectional view of the peripheral region of the drainage mechanism 40 in FIG. FIG. 6 is an explanatory view showing the drainage port forming member 46 constituting the drainage mechanism 40 as viewed from the direction of arrow A in FIG. FIG. 7 is an explanatory view showing the drainage port forming member 46 as viewed from the direction of arrow B in FIG. FIG. 8 is an explanatory view showing a front view of the drainage valve 47 held by the holding member 48 constituting the drainage mechanism 40 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 mounted in this way has a drainage port 46a in the recessed wall 46c that protrudes from the first opening 41 side toward the central axis OL side of the nozzle insertion passage 100N and is recessed on the first opening 41 side. The recessed wall 46c has a recessed area surrounded by a recess from the first opening 41 side as a drainage passage 48d continuous with the second opening 42 of the outer body 21. Further, as shown in the cross-sectional view of FIG. 3 and the enlarged cross-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 main body in the drainage valve 47 described later. 47c is received by the upper end surface of the opening of the drain port 46a. As shown in the cross-sectional views of FIGS. 3 and 5, a component member of the holding member 48 described later is also located in the drainage passage 48d, and the drainage valve 47 described later is held in the recessed wall 46c. Therefore, the drainage passage 48d and the recessed wall 46c will be described later together with the configurations of the holding member 48 and the drainage valve 47.

The direction of arrow A in FIG. 3 coincides with the direction of the opening axis 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 rotation shaft 47a and a valve body 47c. The valve body 47c has an elliptical shape when viewed from the front, 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 drain valve 47 of the present embodiment is formed so that the length of the long side parallel to the rotating shaft 47a is 1.1 to 1.5 times the length of the short side perpendicular to the rotating shaft 47a. It has a valve body 47c. 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 of the inner body 22 on the first opening 41 side of the inclined wall portion 22c, 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 and 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 convex portion 46b will be described in relation to 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 viewed from the direction of arrow C in FIG. The holding member 48 has a third opening 43 in the central region of the frame, and has a convex portion 43a at the upper end of the third opening 43 as shown in FIG. Further, the holding member 48 is provided with two engaging arms 48a 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 distance between the engaging arms 48a is widened, and has a pair of elongated engaging holes 48b from the base of the engaging arm to the tip side. In the engaging arm 48a, the convex engaging projection 22d that the inner body 22 has on the protruding wall portion 22b surrounding the first opening 41, specifically, the first opening 41 is inserted into the engaging hole 48b. Then, it engages with the engaging protrusion 22d. That is, since the holding member 48 engages the engaging arm 48a with the engaging projection 22d that the inner body 22 has as the engaging portion, the engaging arm 48a functions as the engaged portion. The holding member 48 attaches the drainage port forming member 46, which has already been attached to the first opening 41 of the inner body 22, to the inner body 22 so that the attached state is maintained. Specifically, the holding member 48 is attached to the inner body 22 so that the engaging projection 22d of the inner body 22 engages with the engaging hole 48b of the engaging arm 48a, and the drainage port forming member 46 is the first. The state of being attached to the opening 41 is maintained. In this embodiment, the engaging hole 48b is formed so as to cut out the base of the engaging arm 48a. Therefore, in a state where the holding member 48 is mounted on 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 drainage port forming member 46 side. The holding piece 48c is a member for holding the drainage valve 47 that opens and closes the drainage port 46a of the drainage port forming member 46 with respect to the recessed wall 46c of the drainage port forming member 46. That is, the holding piece 48c is a curved surface portion 48e that is curved toward the shaft surface of the rotating shaft 47a in a state where the drainage port forming member 46 is mounted on the inner body 22 as described above. Holds 47a. The rotation shaft 47a has a cylindrical shape on the valve body 47c side, and has a flat portion 47b on which the cylinder is cut out on the opposite side, that is, on the central axis OL side. The holding piece 48c receives the rotation shaft 47a of the drain valve 47 by the curved surface portion 48e on the cylindrical portion side 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 cylindrical portion side thereof, and then 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 as a base point, 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 shape side. Can slide. The rotation shaft 47a is held by the holding piece 48c so that the rotation shaft 47a is located on the central axis OL side of the nozzle insertion passage 100N from the valve body 47c.

The drainage valve 47 incorporated in the recessed wall 46c of the drainage port forming member 46 and held by the pair of holding pieces 48c closes the drainage port 46a by its own weight at the valve body 47c. 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, in the recessed wall 46c of the drainage port forming member 46, the inner peripheral wall 46e of the recessed wall 46c is the rotation shaft of the drainage valve 47 in the closed state of the drainage port 46a. A dent is formed so as not to come into contact with 47a. In addition, 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 viewed from the front as shown in FIG. Explaining in relation to the drainage valve 47 held by the holding piece 48c as described above, the groove portion 46da is a tapered slope of the pedestal portion 46d on both sides of the rotation shaft 47a of the drainage valve 47 in the axial direction. It is formed by being depressed in the recessed wall 46c, and expands the non-contact region of the rotating shaft 47a with respect to the inner peripheral wall 46e of the recessed wall 46c. Due to the expansion of this non-contact region, the valve body 47c rotates without any trouble with the rotation shaft 47a as a base point. More specifically, when the rotating shaft 47a slides along the curved surface of each curved surface portion 48e in the pair of holding pieces 48c on the cylindrical portion side as described above, one end side of the rotating shaft 47a The sliding situation may be different between the one on the other end side and the other end side. In this case, the rotation shaft 47a is inclined so that one end in the axial direction is closer to the tapered slope of the pedestal portion 46d than the other end. Even if the rotation shaft 47a is tilted in this way, the end portion of the rotation shaft that is close to the tapered slope of the pedestal portion 46d does not come into contact with the inner peripheral wall 46e of the recessed wall 46c due to the groove portion 46da. Therefore, as described above, the valve body 47c rotates 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 through the inclined wall portion 22c to the first opening 41, the valve body 47c is pushed by this fluid and rotates around the rotation shaft 47a. Then, the drainage port 46a is opened. The drainage valve 47, which is pushed by the fluid and opens 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 point with the convex portion 43a becomes the rotation end, and the convex portion 43a functions as a stopper for the drainage valve 47.

Further, in a state where the holding member 48 is attached to the inner body 22 so as to hold the drainage port forming member 46, as shown in FIG. 3, the third opening 43 is the second of the outer body 21. It is continuous with the opening 42. Further, the holding member 48 is a liquid flowing out from the drainage port 46a in the recessed region of the recessed wall 46c between the third opening 43 and the drainage port 46a in the drainage port forming member 46. The drainage passage to the second opening 42 is 48d. In addition to this, in the process in which the holding member 48 is attached to the inner body 22 as described above, the convex portion 46b of the drainage port forming member 46 is inserted into the engaging hole 48b by the engaging arm 48a. Insert from the tip side. As the mounting of the holding member 48 to the inner body 22 progresses, the convex portion 46b reaches the base side of the engaging hole 48b while being inserted into the engaging hole 48b. As a result, 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 engaging partner of the convex portion 46b and the engaging projection 22d can be made one, and the shape of the holding member 48 can be simplified.

FIG. 10 is an explanatory diagram showing the assembled state of the main parts of the switchgear 20 as viewed from the direction of arrow D in FIG. As shown in the figure, the drainage port forming member 46 and the holding member 48 are assembled and mounted on the inner body 22 in a state where the drainage port 46a (see FIG. 4) is closed by the drainage valve 47. .. The inner body 22 is attached to the outer body 21 together with the insertion port opening / closing mechanism 10 and the annular body 15 in a state where the drainage port forming member 46 and the holding member 48 hold the drainage valve 47 and are so-called temporarily assembled. Be 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 a fluid flows from the nozzle insertion passage 100N formed by the inner body 22 toward the first opening 41, the liquid flows to the outer body 21 and the inner body. It reaches the drainage port 46a of the drainage mechanism 40 incorporated between the 22 and the drainage mechanism 40. 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 already mounted on the vehicle. The inclined posture is such that the inclined wall portion 22c is inclined so that the first opening 41 side is vertically downward from the nozzle insertion passage 100N side. Therefore, the switchgear 20 directs the liquid such as rainwater that has entered the nozzle insertion passage 100N from the recessed portion 11a and the communication port 21c toward the first opening 41 by the inclined wall portion 22c as described above. It is flushed out using its own weight and reaches the drainage 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 inclined so that the first opening 41 side is the vertically downward side is horizontal as shown in FIG. It was set to 2 to 5 ° from the direction to the lower side. As a result, it is possible to secure the flow of the liquid 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 drained from the nozzle insertion passage 100N to the first opening 41 due to vehicle vibration or the like, so that the inclined wall portion 22c is inclined. The angle θ2 is preferably 2 to 5 ° from the horizontal direction to the lower side.

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

The drainage mechanism 40 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 is between the outer body 21 and the inner body 22 incorporated therein, that is, the inner body 22. It is only arranged in the built-in area of. Therefore, in the outer body 21 of the switchgear 20, it is sufficient that the peripheral wall 21a is formed with the second opening 42 open to the atmosphere, and it is necessary to provide a portion for forming the drainage passage for liquid drainage so as to project 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 that opens / closes the drainage port 46a protrudes from the first opening 41 side toward the central axis OL side of the nozzle insertion passage 100N and is recessed. It is held by the holding piece 48c in the drainage passage 48d in the recessed region of the above. The more the holding region of the drainage valve 47 expands from the first opening 41 side to the outer body 21 side, the more the embedded region of the drainage mechanism 40 expands to the outer body 21 side. In the switchgear 20 of the present embodiment, the drain valve 47 is held in the drainage passage 48d in the recessed region of the recessed wall 46c that protrudes and is recessed toward the central axis OL side of the nozzle insertion passage 100N, so that the liquid is drained. It is possible to suppress the expansion of the built-in area of the mechanism 40. As a result, according to the filler neck 100 having the opening / closing device 20 of the present embodiment, the outer body 21 of the opening / closing device 20 is moved to the outside of the device after ensuring that the liquid that has entered the nozzle insertion passage 100N can be drained. It can be prevented from protruding, or the degree of protrusion can be suppressed more reliably.

The filler neck 100 having the switchgear 20 of the present embodiment holds the rotation shaft 47a of the drainage valve 47 at the curved surface portion 48e of the pair of holding pieces 48c curved so as to face the shaft surface of the rotation shaft 47a. do. Therefore, according to the filler neck 100 having the opening / closing device 20 of the present embodiment, the drainage valve 47 can be smoothly rotated about the rotation shaft 47a as a base point. Moreover, even if the rotating shaft 47a slides and tilts along the curved surface of each curved surface portion 48e in the pair of holding pieces 48c, the groove portion 46da causes the rotating shaft 47a to be recessed in the drainage port forming member 46. Do not contact the inner peripheral wall 46e of the place wall 46c. That is, even if the rotation shaft 47a is tilted due to sliding, the valve body 47c rotates smoothly with the rotation shaft 47a as the base point without any trouble. As a result, the drainage property 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 recessed wall 46c of the drainage port forming member 46, the valve 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. On top of that, the filler neck 100 holds the drain valve 47 so that its rotation shaft 47a does not come into contact with the inner wall surface of the recessed wall 46c. Therefore, according to the filler neck 100 having the opening / closing device 20 of the present embodiment, the valve body 47c can be rotated more smoothly from the rotation shaft 47a as the base point, so that the drainage property can be further improved. ..

In the opening / closing device 20 of the present embodiment, the valve body 47c that rotates for opening / closing the drainage port 46a with respect to the rotation shaft 47a located on the central axis OL side of the nozzle insertion passage 100N is rotated in the front view. The elliptical shape is such that the side perpendicular to the moving axis 47a is the short side. The length of the valve body in the direction perpendicular to the rotation shaft 47a defines the expansion of the built-in region of the drainage mechanism 40 from the central shaft OL of the nozzle insertion passage 100N. In the opening / closing device 20 of the present embodiment, the length of the valve body in the direction perpendicular to the rotation shaft 47a is shorter than the length of the valve body in the direction parallel to the rotation shaft 47a. The spread of the inclusion area can be suppressed. Further, by making the drainage port 46a an elliptical opening corresponding to the valve main body 47c, it is possible to secure an opening area capable of reliably draining 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, the outer body 21 of the opening / closing device 20 is outside the device after ensuring that the liquid that has entered the nozzle insertion passage 100N can be drained. It can be prevented from protruding, 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 switchgear 20 of the present embodiment, the rotation shaft 47a of the drainage valve 47 is a rotation shaft having a flat portion 47b on the central axis OL side with respect to the center of the rotation shaft 47a. By the amount that the rotation shaft 47a is cut out to form the flat portion 47b, the expansion of the incorporated region of the drainage mechanism 40 from the central shaft OL of the nozzle insertion passage 100N can be further suppressed. Therefore, according to the filler neck 100 having the opening / closing device 20 of the present embodiment, it is possible to further suppress the protrusion of the outer body 21 of the opening / closing device 20 to the outside of the device, and to prevent the outer body 21 from coming into contact with the drainage mechanism 40 from the outside. It can be avoided or suppressed more reliably.

In the filler neck 100 having the switchgear 20 of the present embodiment, the length of the long side of the valve body 47c of the drainage valve 47 parallel to the rotation shaft 47a is larger than the length of the short side perpendicular to the rotation shaft 47a. The elliptical shape was 1.1 to 1.5 times. Then, as described above, the inner body 22 has the inclined wall portion 22c that guides the liquid toward the first opening 41, and the filler neck 100 is inclined and mounted on the vehicle. It was tilted at a predetermined tilt angle θ2 (2 to 5 °) with respect to the horizontal direction so as to be vertically downward. Therefore, according to the filler neck 100 having the opening / closing device 20 of the present embodiment, the expansion of the built-in area of the drainage mechanism 40 can be more reliably suppressed, and the inclined wall portion in which the liquid that has entered the nozzle insertion passage 100N is inclined. 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 assembled. 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 directly exerting an external force. can.

In the filler neck 100 having the opening / closing device 20 of the present embodiment, the posture of the holding member 48 when the engaging arm 48a of the holding member 48 engages with the engaging projection 22d of the inner body 22 with the drainage port forming member 46. It 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 composed of the drainage port forming member 46 and the holding member 48 can be easily assembled to the first opening 41 of the inner body 22. Can be done.

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

In the filler neck 100 having the opening / closing device 20 of the present embodiment, the fuel passage 100P for guiding the liquid fuel supplied from the refueling 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 continuous with the nozzle insertion passage 100N of the inner body 22 so as to be provided on the inner body 22 via the underbody 23. In addition to this, the opening / closing device 20 of the present embodiment has a tank-side opening / closing mechanism 30 for opening / closing the nozzle insertion passage 100N at a portion where the fuel passage 100P and the nozzle insertion passage 100N are continuous, and has an outer body 21 and an insertion port. The opening / closing mechanism 10 has a communication port 21c and a recessed portion 11a for communicating the nozzle insertion passage 100N with the atmosphere on the peripheral wall of the nozzle insertion port 104. 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 provided, and when the internal pressure of the fuel tank FT is abnormal. In, 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 on the peripheral wall of the nozzle insertion port 104 or the recessed portion 11a of the insertion port opening / closing member 11.

The present invention can be realized in various aspects. For example, it can be realized in the form of a fuel tank having a fuel tank opening / closing device, a form of a filler neck having a fuel tank opening / closing device, a method of manufacturing a fuel tank opening / closing device, and the like.

Other embodiments:
In the above 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, the concave wall surface recessed in a V shape is formed. The rotation shaft 47a may be held at the site.

In the above embodiment, the pedestal portion 46d for receiving the valve body 47c is tapered, but the rotating shaft 47a is not limited to the tapered shape as long as it does not contact the inner wall surface of the recessed wall 46c. For example, the pedestal portion 46d having an annular convex portion raised in an annular shape at the opening of the drainage port 46a may be used.

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

In the above embodiment, the drainage port 46a has an elliptical opening corresponding to the elliptical valve body 47c, but the opening 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 a convex portion 46b, and when the holding member 48 is attached to the inner body 22, the convex portion 46b enters the engaging hole 48b and the posture of the holding member 48. However, it is not limited to this. For example, by defining the distance between the engaging arms 48a in the holding member 48 according to the dimension in the width direction of the drainage port forming member 46, the posture when the holding member 48 is attached to the inner body 22 is determined. May be good.

In the above embodiment, the fuel passage forming portion 25 for forming the fuel passage 100P for guiding the liquid fuel supplied from the refueling nozzle FN to the fuel tank FT, and the tank side opening / closing mechanism 30 for opening / closing 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 may be not the form of 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, but the form of the opening / closing device 20.

The present invention is not limited to the above-described embodiments, examples, and modifications, and can be realized with various configurations within a range not deviating from the gist thereof. For example, the technical features in the embodiments, examples, and modifications corresponding to the technical features in each of the embodiments described in the column of the outline of the invention may be used to solve some or all of the above-mentioned problems. , Can be replaced or combined as appropriate to achieve some or all of the above effects. Further, if the technical feature is not described as essential in the present specification, it can be appropriately deleted.

10 ... Insertion port opening / closing mechanism 11 ... Insertion port opening / closing member 11a ... Depressed recess 12 ... Insertion side spring 12L ... Fixed end 15 ... Ring body 20 ... Opening / closing device 21 ... Outer body 21a ... Circumferential wall 21b ... Ceiling wall 21c ... Communication port 22 ... Inner body 22a ... Passage peripheral wall 22b ... Protruding wall part 22c ... Inclined wall part 22d ... Engagement 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 portion 45 ... Circular seal body 46 ... Drainage port forming member 46a ... Drainage port 46b ... Convex portion 46c ... Recessed wall 46d ... Pedestal 46da ... Groove 46e ... Inner peripheral wall 47 ... Drain valve 47a ... Rotating shaft 47b ... Flat part 47c ... Valve body 48 ... Holding member 48a ... Engagement arm 48b ... Engagement hole 48c ... Holding piece 48d ... Drainage passage 48e ... Curved surface part 100 ... Filler neck 100N ... Nozzle insertion passage 100P ... Fuel passage 102 ... Fuel steam port 104 ... Nozzle insertion port 104s ... Refueling port peripheral wall 104t ... Nozzle insertion side peripheral wall BV ... Gas discharge valve FE ... Mounting member FN ... Refueling nozzle FP ... Filler pipe FR ... Refueling room FS ... Refueling device FT ... Fuel tank NT ... Fuel steam tube OL ... Central axis TV ... Check valve

Claims (3)

A fuel tank switchgear (20)
A passage peripheral wall (22a) formed so as to surround the nozzle insertion passage (100N) of the refueling nozzle (FN), and a first opening formed on the passage peripheral wall (22a) to open the nozzle insertion passage (100N) to the atmosphere. A housing (22) having (41) and
A cover body (21) into which the housing (22) is incorporated, the peripheral wall (21a) formed so as to surround the housing (22), and the first opening (41) formed in the peripheral wall (21a). ) And the second opening (42) open to the atmosphere facing the atmosphere, and the cover body (21) having the nozzle insertion port (104) of the refueling nozzle (FN) on the ceiling wall (21b) of the peripheral wall (21a). )When,
An insertion port opening / closing mechanism (10) that opens / closes the nozzle insertion port (104),
It has a drainage mechanism (40) located between the cover body (21) and the housing (22) to drain liquid from the nozzle insertion passage (100N).
The drainage mechanism (40)
A recess that is mounted on the first opening (41), protrudes from the first opening (41) side toward the central axis (OL) side of the nozzle insertion port (104), and is recessed on the first opening (41) side. It has a recessed wall (46c) that continuously forms (48d) in the second opening (42), and the first opening (41) from the nozzle insertion passage (100N) in the recessed wall (46c). A drainage port forming member (46) having a drainage port (46a) for flowing liquid toward the surface, and a drainage port forming member (46).
It has a rotation shaft (47a) and a valve body (47c), and in the recess (48d), the drainage port (47c) is rotated by the rotation of the valve body (47c) with the rotation shaft (47a) as a base point. A drain valve (47) that opens and closes 46a),
A fuel tank switchgear (20) comprising a holding member (48) having a holding piece (48c) that holds the rotating shaft (47a) against the recessed wall (46c). The fuel tank switchgear (20) according to claim 1.
The holding piece (48c) is a curved surface portion (48e) facing the shaft surface of the rotating shaft (47a), and is a fuel tank opening / closing device (20) that holds the rotating shaft (47a). The fuel tank switchgear (20) according to claim 1 or 2.
The drainage port forming member (46) has the valve body (47c) of the drainage port (46a) so that the rotation shaft (47a) does not come into contact with the inner wall surface of the recessed wall (46c). A fuel tank switchgear (20) having a pedestal portion (46d) that receives it on the upper end surface of the opening.

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