JP6116146B2 - Valve device - Google Patents

Description

  The present invention relates to an improvement in a valve device that is combined with a filler pipe to form an oil supply port.

  There is a valve device that is fitted into an upper end portion of a filler pipe and constitutes a capless oil supply port. (Refer to Patent Documents 1 and 2) Such a valve device includes a flap valve that is pushed by an oiling nozzle to be inserted and rotates against an urging force to allow the oiling nozzle to enter the back of the filler pipe. Have. With such a flap valve, it is not necessary to close the upper end of the filler pipe with a cap at the time of non-fuel supply, and in this sense, such a valve device constitutes a capless oil supply port.

  Here, it is required to form a gap wide enough to smoothly release the gas in the fuel tank to the outside during refueling between the valve port closed by the flap valve and the refueling nozzle passing therethrough. It is done. However, when the valve opening is simply enlarged, the diameter of the valve device, and hence the filler pipe into which it is fitted, is increased. As shown in Patent Document 2, if the valve port is provided in the partition wall that obliquely intersects the central axis of the filler pipe, the gap can be made as wide as possible while miniaturizing the valve device. . However, in this type of valve device, it is also required that an auxiliary valve (called a check valve or the like) that is opened when the fuel tank side reaches a predetermined high pressure is separately incorporated. However, the thing of patent document 2 is not equipped with such an auxiliary valve.

US Pat. No. 6,189,581 US Pat. No. 7,708,036

  The main problem to be solved by the present invention is that a valve device that includes a flap valve and constitutes a capless oil filler can be made as small as possible without impairing its function.

In order to achieve the above object, according to the present invention, a valve device is combined with a filler pipe to form a fuel filler opening, and a main valve portion opened by inserting a fuel filler nozzle and a fuel tank side are predetermined. A valve device having a sub-valve portion that is opened when the pressure becomes high,
It has a partition wall formed so as to cross obliquely with respect to the central axis of the filler pipe,
In this partition wall, a flap valve that constitutes the main valve portion is seated from the fuel tank side by urging, and a circular large-diameter valve port that can pass through the fuel nozzle,
A valve body that constitutes the sub-valve part and is provided with a circular small-diameter valve port on which a valve body having a circular cross-sectional outer shape in a direction orthogonal to the movable direction is seated from the outside by biasing,
The accommodation chamber of the valve body constituting the auxiliary valve portion, in the direction of the cross section perpendicular to the moving direction of the valve body perpendicular to the imaginary straight line connecting the centers of said large diameter valve opening of the receiving chamber An oblong shape that is wide in the direction and narrow in the direction along the straight line, and when the fuel tank side becomes the predetermined high pressure between the storage chamber and the valve body, the air on the fuel tank side is formed. It was made to ensure the ventilation gap which escapes .

  The circular large-diameter valve port constituting the main valve portion is formed by a partition wall that is formed so as to cross obliquely with respect to the central axis of the filler pipe, so that the oil filler nozzle that passes through the large-diameter valve port The outer diameter of the valve device can be made as small as possible even if the air gap is sufficiently large to allow the air in the fuel tank to escape during refueling. That is, the large diameter valve port has an elliptical shape when viewed from the direction along the central axis of the filler pipe. On the other hand, since the large-diameter valve port is circular, the valve seat (seal part) on which the flap valve is seated can be configured circularly. Further, since the flap valve is seated from the fuel tank side on a partition wall formed so as to cross obliquely with respect to the central axis of the filler pipe, first, the flap disposed horizontally is initially inserted at the beginning of the fueling nozzle. The insertion load of the fuel nozzle can be reduced compared to the case where the fuel nozzle is abutted against the valve, and secondly, the flap valve can be turned less than 90 degrees from the seating position at the end of the fuel nozzle insertion. Therefore, the insertion load of the oil supply nozzle to the oil supply port can be reduced even in the entire insertion process. Further, the storage chamber constituting the sub-valve portion is configured to be wide in a direction orthogonal to a virtual straight line connecting the center of the storage chamber and the center of the large-diameter valve port, and narrow in a direction along the straight line. Therefore, while ensuring a sufficient ventilation gap between the storage chamber and the valve body for releasing air on the fuel tank side when the fuel tank side reaches the predetermined high pressure, It is possible to minimize the outer diameter.

  According to the present invention, the valve device that includes the flap valve and constitutes the capless oil supply port can be configured as small as possible without impairing the function thereof. Therefore, the present invention can be combined with the combination counterpart of the valve device. This contributes to a reduction in the diameter of the filler pipe, that is, the oil filler opening constituted by this valve device.

FIG. 1 is a cross-sectional configuration diagram illustrating a state where an oil supply nozzle is inserted into an oil supply port configured by a valve device according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the valve device. FIG. 3 is a sectional view showing the same state as FIG. 1 with the cap body constituting the valve device omitted. FIG. 4 is a perspective view of a main body constituting the valve device, and shows the main body as viewed from below. FIG. 5 is a side view of the main body. FIG. 6 is a side view showing the main body as viewed from a different direction from that of FIG. FIG. 7 is a side view showing the main body as viewed from a different direction from FIGS. 5 and 6. FIG. 8 is a plan view of the main body. FIG. 9 is a cross-sectional view taken along the line A-A in FIG. 8, showing the state in which the valve device is attached to the filler pipe, omitting the description of the cap body constituting the valve device, and the valve device is in the closed state. . 10 is a cross-sectional view taken along the line BB in FIG. FIG. 11 is a perspective view of an upper case constituting the main body. FIG. 12 is a perspective view of the upper case, which is viewed from below. FIG. 13 is a side view of the upper case. 14 is a cross-sectional view taken along the line CC in FIG. 15 is a cross-sectional view taken along the line DD in FIG. FIG. 16 is a perspective view of a lower case constituting the main body. FIG. 17 is a bottom view of a cap body constituting the valve device.

  Hereinafter, typical embodiments of the present invention will be described with reference to FIGS. The valve device according to this embodiment is combined with the filler pipe P to form the fuel filler port Pa. More specifically, such a valve device is pushed by this when the fuel nozzle N constituting the fuel gun is inserted and rotates against the bias to allow the fuel nozzle N to enter from the valve port to the back. The flap valve 102 is provided. When the fuel nozzle N is not inserted by the flap valve 102, the fuel filler Pa is closed. Thereby, this valve apparatus does not require an oil supply cap.

  Such a valve device includes a main body 1 and a cap body 2.

  The main body 1 includes a valve portion that is fitted inside the filler pipe P and that is opened by insertion of the fueling nozzle N. In this embodiment, the main body 1 is also provided with a valve portion that is opened when the fuel tank side I becomes a high pressure. Hereinafter, the valve portion 101 that is opened by inserting the fuel supply nozzle N is referred to as a main valve portion 10, and the valve portion that is opened when the fuel tank side I is at a high pressure is referred to as a sub-valve portion 11.

  In this embodiment, the main body 1 has a substantially cylindrical shape. In the illustrated example, the main body 1 has an outer diameter that is substantially equal to the inner diameter of the filler pipe P, typically the upper end side of the filler neck. The main body 1 is provided with an outer casing 12a at the upper end, and the outer casing 12a can be inserted into the filler pipe P until the insertion end position where the outer casing 12a is caught by the upper end of the filler pipe P.

  Further, the main body 1 is allowed to be inserted into the filler pipe P by elastic deformation, and at the same time, the main body 1 enters into the window hole Pb formed in the filler pipe P by elastic return at the insertion end position. The elastic engagement piece 12b is provided. In the illustrated example, the main body 1 is formed by combining an upper case 12 that has a substantially cylindrical shape and a lower case 13 that has a substantially cylindrical shape. The upper case 12 is provided with the outer casing 12a at the upper end thereof, and a valve port 101 constituting the main valve portion 10 is formed at the lower end side of the upper case 12. The elastic engagement piece 12b is constituted by a part of the side wall divided by a split groove 12c penetrating the side wall of the upper case 12. In the example shown in the figure, the upper case 12 is formed with three elastic hooking pieces 12b... 12b at intervals from the elastic hooking pieces 12b adjacent to each other in the direction around the cylinder axis of the upper case 12. . Each elastic engagement piece 12b is configured to have the outer casing 12a side as a free end and have an inclination gradually away from the cylinder axis of the upper case 12 toward the outer casing 12a.

  On the other hand, the cap body 2 has an annular shape through which the fueling nozzle N passes, and includes a hooking portion 20 for the hooked portion Na formed on the outer side of the fueling nozzle N, and is fitted on the outer side of the filler pipe P. It is supposed to be.

  In the illustrated example, the cap body 2 has a short cylindrical shape including a small-diameter cap upper portion 21 and a large-diameter cap lower portion 22. An outer step surface 23 facing upward and an inner step surface 24 facing downward are formed at the joint portion between the cap upper portion 21 and the cap lower portion 22 due to the difference in size between the cap upper portion 21 and the cap lower portion 22. The inner diameter of the cap lower portion 22 of the cap body 2 is substantially equal to the outer diameter of the portion where the outer casing 12a of the main body 1 is fitted into the filler pipe P as described above. On the other hand, the inner diameter of the cap upper portion 21 of the cap body 2 is smaller than the outer diameter of the portion where the outer casing 12a of the main body 1 is formed. The hook portion 20 is constituted by an inner collar 21 a formed on the cap upper portion 21 of the cap body 2.

  In addition, the cap body 2 allows the filler pipe P to be received inside the cap body 2 by elastic deformation, and a flange formed at the end of the filler pipe P by elastic return at the receiving end position. An elastic engagement piece 22a engaged with Pd is provided. In the illustrated example, the elastic engagement piece 22 a is constituted by a part of the side wall divided by a split groove 22 b that penetrates the side wall of the cap lower part 22. In the example shown in the figure, the cap lower portion 22 is formed with four elastic hooking pieces 22a... 22a at intervals from the adjacent elastic hooking pieces 22a in the direction around the cylindrical axis of the cap lower portion 22. . Each elastic engagement piece 22a is configured such that the inner stepped surface 24 side is a free end, and the inner surface of the free end side is inclined so as to gradually approach the cylindrical axis of the cap lower portion 22 toward the free end. Has been. In the illustrated example, when the filler pipe P is introduced into the cap lower part 22 of the cap body 2 from the state in which the main body 1 is fitted into the filler pipe P, the inner surface of the elastic hooking piece 22a comes into contact with the outer collar 12a of the main body 1. The elastic engagement piece 22a is once bent outward and the introduction of the filler pipe P into the cap body 2 is allowed. Then, when such introduction is performed up to a position where the inner step surface 24 of the cap body 2 contacts the upper surface of the outer casing 12a of the main body 1, each elastic engagement piece 22a is elastically restored to the lower surface of the flange Pd of the filler pipe P. The free end is engaged.

  In the figure, reference numeral 25 denotes an inner ring that has an outer diameter substantially equal to the inner diameter of the cap upper portion 21 of the cap body 2 and is fitted in the cap upper portion 21, and is lubricated by the inner shape of the inner ring 25. The tip of the fueling nozzle N inserted into the port Pa is guided to the main valve portion 10 of the main body 1. In the example shown in the drawing, the spiral raised portion (the raised portion formed so as to follow the virtual spiral around the central axis of the fuel nozzle N) as the hooked portion Na formed outside the fuel nozzle N, When the oil supply nozzle N is inserted into the oil supply port Pa to a predetermined position, the oil supply nozzle N is engaged with the engagement portion 20 to prevent the oil supply nozzle N from dropping off from the oil supply port Pa. (Figure 1)

  Thus, in this embodiment, the main body 1 provided with a valve portion (main valve portion 10) that is opened by insertion of the fueling nozzle N and the cap body 2 are separated, Since each is individually fitted to the filler pipe P, the cap body 2 is damaged when an external force that damages the cap body 2 located outside the filler pipe P is applied. Even when the main body 1 is not damaged, the main body 1 can secure the state where the fuel filler port Pa is closed. When such a damage to the cap body 2 occurs, the oil filler Pa can be easily repaired by simply replacing the cap body 2.

  Further, the main body 1 has a partition wall 12d formed so as to cross obliquely with respect to the central axis of the filler pipe P. Then, a circular large-diameter valve port 101 ′ that allows the flap valve 102 constituting the main valve portion 10 to be seated from the fuel tank side I and to pass through the fuel supply nozzle N, and to the partition wall 12d, The valve body 111 which comprises the subvalve part 11 is equipped with the small diameter valve port 111a which seats from the external side O by urging | biasing.

  In the illustrated example, the upper case 12 constituting the main body 1 is formed so that its lower end edge 12e is along an imaginary straight line x that obliquely crosses the cylinder axis of the upper case 12. (FIGS. 12 and 14) Further, the upper case 12 is in a range of about 180 degrees around the cylinder axis of the lower end edge 12e, and is located on the upper side across the cylinder axis. It has an inner flange 12f. The inner and outer surfaces of the inner flange-shaped portion 12f are formed along a virtual straight line x that obliquely intersects the cylinder axis. The inner surface of the upper case 12 in the range of about 180 degrees around the cylinder axis and the non-forming side of the inner flange-shaped portion 12f is between the upper end of the upper case 12 and the middle position in the vertical direction. The inclined surface 12g gradually narrows the inner diameter of the upper case 12 toward the middle position in the direction, and extends along the cylinder axis from the middle position in the vertical direction to the lower end of the upper case 12. It is a non-inclined surface 12h. A valve port 101 (large-diameter valve port 101 ′) constituting the main valve unit 10 is formed on the lower end side of the upper case 12 by the inner flange portion 12 f and the non-inclined surface 12 h. That is, in the illustrated example, the partition wall 12d is formed by the inner flange portion 12f.

  The flap valve 102 is configured to have a substantially disk shape. On the outer surface side of the partition wall 12d of the upper case 12, a pair of bearing portions 12i and 12i projecting downward are formed. A pair of bearing portions 102 a and 102 a are also formed in the lower part of the flap valve 102. In the illustrated example, the pair of bearing portions 102a, 102a of the flap valve 102 are accommodated between the pair of bearing portions 12i, 12i of the upper case 12, and the shaft body 3 is placed in the shaft holes provided in the bearing portions 12i, 102a. By passing, the flap valve 102 is rotatably combined with the outer side of the lower end of the upper case 12. In the illustrated example, the shaft body 3 is passed through the coil portion between the pair of bearing portions 102a, 102a of the flap valve 102, one arm portion is brought into contact with the outer surface of the flap valve 102, and the other arm portion is disposed. The flap valve 102 is urged as described above by the torsion coil spring 4 attached so as to abut the inner surface of the lower case 13. In the illustrated example, the flap valve 102 is configured by combining a lower part 102b having the bearing 102a with a disk-shaped upper part 102c seated on the large-diameter valve port 101 '.

  The small-diameter valve port 111a that constitutes the sub-valve portion 11 is a circular hole that vertically penetrates the partition wall 12d. (FIGS. 10 and 15) In the upper case 12, a tube-like portion 12j that protrudes upward with the lower end integrally connected to the partition wall 12d is formed. The small-diameter valve port 111a is formed in a part of a partition wall 12d surrounded by the lower end of the tubular portion 12j. The upper end of the tubular portion 12j is positioned below the upper end of the upper case 12. In the illustrated example, the partition wall 12d in the upper case 12, that is, the inner flange portion 12f is covered with a cover 14 attached immediately above. The upper end of the tubular part 12j is closed by a lattice-like ventilation part 14a of the cover 14. The inner edge of the cover 14 does not protrude inwardly from the edge of the large-diameter valve port 101 ′ when the upper case 12 is viewed from above, and is a circle that follows the edge of the large-diameter valve port 101 ′. It has an arc shape. (FIG. 8) In this tubular part 12j, the valve body 111 which comprises the said subvalve part 11, and the compression coil spring 113 which seats this valve body 111 from the external side O by energizing are accommodated. The compression coil spring 113 has the lower end of the spring abutted on the valve body 111 and the upper end of the spring abutted on the lattice-shaped ventilation portion 14 a of the cover 14.

  That is, the tubular chamber 12j constitutes a storage chamber 114 for the valve body 111 that constitutes the auxiliary valve portion 11. The valve body 111 is housed in the storage chamber 114 so as to be movable up and down, and has a circular cross-sectional shape in a direction perpendicular to the movable direction. On the other hand, the storage chamber 114 has a direction orthogonal to a virtual straight line y connecting the center of the storage chamber 114 and the center of the large-diameter valve port 101 ′ in a cross section orthogonal to the movable direction of the valve body 111. And is narrowed in the direction along the straight line y. (FIG. 15) In the illustrated example, the cross section of the accommodation chamber 114 has an oval shape. When the fuel tank side I reaches a predetermined high pressure, that is, when the pressure difference between the fuel tank side I and the external side O exceeds a predetermined value, the valve element 111 resists the bias of the compression coil spring 113. Is moved upward, the small-diameter valve port 111a is opened, and air on the fuel tank side I is released to the outside from between the valve body 111 and the tubular portion 12j.

  Since the circular large-diameter valve port 101 ′ constituting the main valve portion 10 is formed by a partition wall 12d formed so as to cross obliquely with respect to the central axis of the filler pipe P, the large-diameter valve port 101 ′. The outer diameter of the valve device can be made as small as possible even if the air gap is sufficiently secured to allow the air in the fuel tank to escape during refueling between the refueling nozzle N passing through the fuel tank. That is, the large-diameter valve port 101 ′ has an elliptical shape when viewed from the direction along the central axis of the filler pipe P. On the other hand, since the large-diameter valve port 101 ′ is circular, the valve seat portion 103 (seal portion) on which the flap valve 102 is seated can be configured to be circular. Therefore, it is possible to configure the valve seat portion 103 by attaching the ring seal body 5 described later made of an elastomer to the edge portion of the large-diameter valve port 101 ′ without causing distortion or the like. The flap valve 102 can be seated on the seal body 5 without any gap over the entire circumference of the valve port 101 ′, and the large-diameter valve port 101 ′ can be appropriately closed when the valve is closed. Further, since the flap valve 102 is seated from the fuel tank side I on the partition wall 12d formed so as to cross obliquely with respect to the central axis of the filler pipe P, first, the flap valve 102 is horizontal at the beginning of the insertion of the fueling nozzle N. The insertion load of the oil supply nozzle N can be reduced compared to the case where the oil supply nozzle N is abutted against the flap valve 102 disposed in the second position, and secondly, the rotation of the flap valve 102 from the seating position when the oil supply nozzle N is inserted is completed. Since the moving angle can be less than 90 degrees, the insertion load of the fuel nozzle N to the fuel filler Pa can be reduced even in the entire insertion process. In addition, the storage chamber 114 constituting the sub-valve portion 11 is wide in a direction orthogonal to a virtual straight line y connecting the center of the storage chamber 114 and the center of the large-diameter valve port 101 ′, and follows the straight line y. Since it is configured to be narrow in the direction, there is a sufficient ventilation gap between the storage chamber 114 and the valve body 111 for allowing the air on the fuel tank side I to escape when the fuel tank side I reaches the predetermined high pressure. It is possible to prevent the storage chamber 114 from becoming a factor that increases the outer diameter of the valve device. As a result, the valve device according to this embodiment can be configured as small as possible without impairing its function, and the filler pipe P that is the combination partner, that is, the diameter of the filler port Pa formed by this valve device is reduced. It has features that contribute to

  Further, in this embodiment, the valve device has an annular seal body 5 provided so as to surround the large diameter valve port 101 ′ constituting the main valve portion 10. The seal body 5 includes an annular main seal portion 50 that is in close contact with an annular main seal surface 102d formed on the outer periphery of the flap valve 102 when the flap valve 102 is seated, and an inner side of the main seal surface 102d. And an annular sub-seal portion 51 that is in close contact with an annular sub-seal surface 102e formed on the flap valve 102.

  In the illustrated example, the seal body 5 is held inside the lower case 13, and the lower case 13 holding the seal body 5 in this way is combined with the upper case 12 so that the partition wall 12d is provided on the lower side. In the illustrated example, the lower case 13 has an inner diameter substantially equal to the outer diameter on the lower end side of the upper case 12. On the upper end side of the lower case 13, a window hole 13 a into which the hooking claws 12 k formed on the lower end outer surface of the upper case 12 enter is formed. A rotating rib 13b is formed inside the lower case 13, and the upper surface of the rotating rib 13b is along the virtual straight line x inclined along the lower edge of the upper case 12.

  In the illustrated example, the seal body 5 has a circumferential groove 52 on the outer peripheral portion. Then, the circumferential rib 13 b is inserted into the circumferential groove 52 so as to be held inside the lower case 13. The diameter of the large-diameter valve port 101 ′ of the upper case 12 is smaller than the inner diameter of the lower case 13 at the position where the circumferential rib 13 b is formed. The lower end side of the upper case 12 is placed in the lower case 13 so that the direction of inclination of the circumferential rib 13b is aligned with the direction of inclination of the lower end edge 12e of the upper case 12, and the lower end edge 12e of the upper case 12 is It can be inserted to a position where it hits the upper part of the seal body 5 held in this way. (Indicated by reference numeral 13c in FIG. 16 is a notched portion formed in the lower case 13 in order to allow the bearing portion 12i of the upper case 12 to escape during the insertion.) This insertion is mainly a part of the lower case 13 side. The latching claw 12k enters the window hole 13a by elastic return at the insertion end position, and the upper case 12 and the lower case 13 are integrated. The flap valve 102 is attached to the upper case 12 after combining the upper case 12 and the lower case 13 in this way. 3 is a seal ring that seals between the upper case 12 and the filler pipe P above the position where the upper case 12 and the lower case 13 are engaged.

  When the flap valve 102 is seated, the outer peripheral portion of its upper surface is brought into close contact with the lower portion of the seal body 5 held as described above. That is, in the illustrated example, the outer peripheral portion of the flap valve 102 functions as the main seal surface 102d, and the lower portion of the seal body 5 functions as the main seal portion 50.

  Further, the seal body 5 includes a circumferential fin-like portion 53 that goes around the entire circumference of the seal body 5 on the inner peripheral portion thereof. The circumferential fin portion 53 protrudes so as to narrow the inner diameter of the seal body 5 as it goes downward, and the protruding end is positioned above the main seal portion 50. When the flap valve 102 is seated, the protruding end of the circumferential fin-like portion 53 is in close contact with the upper surface of the flap valve 102 inward of the main seal surface 102d. That is, in the illustrated example, the circumferential fin portion 53 of the seal body 5 functions as the sub seal portion 51.

  In the illustrated example, a circumferential step portion 102f is formed on the upper surface of the flap valve 102 to position an outer peripheral portion serving as the main seal surface 102d below the center side. The projecting end of the circumferential fin-like portion 53 comes into close contact with the central edge of the flap valve 102 on the step of the circumferential step portion 102f when the flap valve 102 is seated. That is, in the illustrated example, the central edge of the flap valve 102 functions as the secondary seal surface 102e, and the secondary seal surface 102e is positioned above the main seal surface 102d. In the illustrated example, a raised portion 102g is formed on the upper surface side of the flap valve 102 and inward of the sub seal surface 102e, and the flap valve 102 is inclined in a state of being seated on the large diameter valve port 101 ′. However, the oil supply nozzle N inserted by the raised portion 102g contacts and presses the flap valve 102 on the free end side of the flap valve 102 as much as possible.

  Thereby, in the valve device according to this embodiment, the dust that enters the fuel filler port Pa when the flap valve 102 is seated is blocked by the sub seal portion 51 and the sub seal surface 102e, and the dust is prevented from entering the main seal portion. 50 and the main seal surface 102d can be prevented from entering as much as possible. Thereby, it is possible to ensure a high sealing performance when the flap valve 102 is seated.

  In this embodiment, the mouth edge portion 101a of the large-diameter valve port 101 ′ is located inward of the large-diameter valve port 101 ′ from the sub-seal portion of the seal body 5, that is, a circumferential fin-shaped portion. 53 is positioned inward of the large-diameter valve port 101 ′ from the protruding end of 53. (FIG. 9) Thereby, in this embodiment, when the oil supply nozzle N is inserted into the oil supply port Pa, the oil supply nozzle N does not come into contact with the sub seal portion and is not damaged.

  Further, in this embodiment, the hooking portion 20 to be hooked to the hooked portion Na formed outside the fueling nozzle N is the outer side O across the large-diameter valve port 101 ′, The oil supply nozzle N is provided on one side across the central axis. (FIG. 1) In the illustrated example, the engaging portion 20 is formed at a position directly above the partition wall 12d. Further, the flap valve 102 comes into contact with the oil nozzle N to be inserted on the one side across the central axis of the oil nozzle N. (FIG. 1) In this embodiment, the central axis is sandwiched with respect to the oil supply nozzle N to be inserted at a position between the engagement portion 20 and the contact position of the flap valve 102. A fulcrum portion 7 that abuts on the other side is provided. In the illustrated example, the oil supply nozzle N inserted into the oil supply port Pa is guided by the inner ring 25 of the cap body 2 and the inclined surface 12g of the upper case 12 and guided to the large diameter valve port 101 ′, and the partition wall 12d Immediately below, the flap valve 102, which is rotatably coupled to the upper case 12, is pushed and rotated against the biasing force. Due to the urging force applied to the flap valve 102, a moment toward the right side in FIG. 1 is applied to the tip end side of the fueling nozzle N. From the contact position with the flap valve 102 on the right side surface of the fueling nozzle N. Also, the upper part is in contact with the non-inclined surface 12 h of the upper case 12. Therefore, a moment toward the left side in FIG. 1 is applied to the fuel supply nozzle N above the non-inclined surface 12h. As a result, the oil supply nozzle N inserted into the oil supply port Pa is engaged with its engaged portion Na on the valve device side by the urging force applied to the flap valve 102 on the outer side O than the large diameter valve port 101 ′. The parts are engaged firmly and stably. That is, in the illustrated example, the non-inclined surface 12h functions as the fulcrum portion 7 constituting a lever-like structure.

P Filler pipe N Refueling nozzle 10 Main valve portion 101 'Large diameter valve port 102 Flap valve 11 Sub valve portion 111a Small diameter valve port 112 Valve element 114 Storage chamber y Virtual straight line

Claims (1)

A valve comprising a main valve portion that is combined with a filler pipe to form a fuel filler opening, and that is opened by inserting a fuel filler nozzle, and a sub-valve portion that is opened when the fuel tank side reaches a predetermined high pressure. A device,
It has a partition wall formed so as to cross obliquely with respect to the central axis of the filler pipe,
In this partition wall, a flap valve that constitutes the main valve portion is seated from the fuel tank side by urging, and a circular large-diameter valve port that can pass through the fuel nozzle,
A valve body that constitutes the sub-valve part and is provided with a circular small-diameter valve port on which a valve body having a circular cross-sectional outer shape in a direction orthogonal to the movable direction is seated from the outside by biasing,
The accommodation chamber of the valve body constituting the auxiliary valve portion, in the direction of the cross section perpendicular to the moving direction of the valve body perpendicular to the imaginary straight line connecting the centers of said large diameter valve opening of the receiving chamber An oblong shape that is wide in the direction and narrow in the direction along the straight line, and when the fuel tank side becomes the predetermined high pressure between the storage chamber and the valve body, the air on the fuel tank side is formed. A valve device characterized in that a ventilation gap for escaping air is secured .

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