JP5090280B2 - Filling port closing device - Google Patents

Description

  The present invention relates to a fuel filler closing device that opens and closes a guide opening that guides a fuel filler nozzle inserted from a fuel filler opening by a flapper that is pivotable downward while being pushed upward by a torsion coil spring, for example. .

  The configuration that attaches and closes the filler port cap to the filler port has the advantage that it is easy to ensure the sealing property of the filler port, but it requires labor to attach and remove the filler port cap, and the tightening operation when attaching the cap is inappropriate There is a risk that the sealing will be insufficient and the removed filler cap may be lost. In view of this, there has been proposed a fuel filler closing device including a flapper that is pushed by an oil filler nozzle inserted from the outside and pivots downward to open, and that pivots upward when the fuel nozzle is pulled out. According to the fuel filler closing device, the fuel filler cap is not forgotten to be tightened, and the fuel filler opening is closed until just before the fuel filler nozzle is actually inserted. There is an advantage that the fuel supply port is opened only during the substantial refueling operation to be injected, and the release of fuel vapor can be suppressed.

  The filler closing device is configured to open and close by a flapper that rotates a guide opening that guides a filler nozzle inserted from the filler opening, and the flapper is rotated downward while being pushed upward by a torsion coil spring. The guide opening is opened when the oil supply nozzle is pushed by the oil supply nozzle inserted through the oil supply port opening and rotated downward, and when the oil supply nozzle is pulled out, the guide opening is closed by rotating upward with a torsion coil spring. Here, since the guide opening is recessed from the oil supply opening, if the oil supply opening is exposed to the outside as it is, dust and rainwater accumulate in the area up to the guide opening, and the oil supply nozzle is inserted to open the flapper. When this occurs, there is a problem that dust and rainwater enter the oil supply pipe body. From this, in the fuel filler closing device, a cover for opening and closing the fuel filler opening is often provided.

  As is apparent from the above, the fuel filler closing device tends to be complicated in construction. For this reason, the fuel filler closing device is divided into several units, and is manufactured by a procedure for assembling individually assembled units at the end. For example, in the fuel filler closing device disclosed in Patent Document 1, a closing unit (tubular adapter 20) having a guide opening that opens and closes by a flapper (lid 24) that is rotatable downward is formed integrally with the fuel filler, and is rotated upward. A cover unit (filling tub 10) having an oil supply opening (actuation bush 40) opened and closed by a movable cover (fuel tank cap 16) is connected to the closing unit. The fuel filler closing device disclosed in Patent Literature 2 or Patent Literature 3 is also different from the detailed configuration in detail, but the overall configuration is the same as the fuel filler closing device disclosed in Patent Literature 1.

International Publication No. 2008/007179 pamphlet U.S. Patent No. 6,991,006 International Publication No. 2005/077698 Pamphlet

  Taking the fuel filler closing device disclosed in Patent Document 1 as an example, the cover unit and the closing unit are connected by simple engagement of lugs 62 and detent beaks 66, and are fixed from the outside. Separation is possible when the above impact is applied. This is a means for avoiding the possibility that the closing unit is pulled by the cover unit that moves together with the outer surface of the vehicle body in the event of a vehicle collision or the like, and further the fuel supply pipe is damaged. However, the connection between the cover unit and the closing unit due to the engagement of the protrusions and the claw is not very strong, and there is a possibility that even a relatively slight collision may be separated. Accordingly, there is a need for a connection means that separates the cover unit and the closing unit when an impact of a certain level or more is applied from the outside, although it is not easily separated.

  Here, when connection means that does not easily separate is employed, the possibility that the cover unit is subjected to an impact before the cover unit is separated from the closing unit increases. In this case, a large impact is applied to the seal ring built in the closing unit pulled by the cover unit, and the seal ring may be deformed to deteriorate the sealing performance in the filler closing device. However, it is difficult to completely prevent the impact from being transmitted to the seal ring. Therefore, it is required to reduce the impact transmitted to the seal ring as much as possible. Then, the cover unit and the closing unit are connected by a connecting means that is not easily separated, and an oil filler closing device that reduces the impact transmission to the seal ring when the impact is not separated when the impact is applied was studied.

  As a result of the study, we developed a refueling port closing device that pushes the flapper that was biased upward and closed the guide opening by a refueling nozzle inserted from the refueling port opening to the guide opening. An oil supply port closing device is configured by fitting a closing unit having a guide opening that is opened and closed by a flapper into an oil supply port, and externally fitting a cover unit having an openable and closable oil supply port opening to the oil supply port. Specifically, the oil supply port forms a lower engagement step whose diameter is expanded above the connection port with the oil supply pipe main body, and forms a lower peripheral surface of the oil supply port above the lower engagement step. An upper engaging step that is expanded upward from the lower peripheral surface of the opening is formed, an upper peripheral surface of the fuel filler port is formed above the upper engaging step, and the closing unit is in contact with the upper peripheral surface of the fuel filler. A joint step is formed, and the cover unit has a covering peripheral surface that is fitted on the upper peripheral surface of the fuel filler opening. For example, the cover unit can be opened and closed by providing a cover that is rotatable upward with respect to the fuel filler opening.

  As a result, the closing unit is inserted into the oil supply port until the annular step on the peripheral surface of the unit is engaged with the lower engaging step, and the upper peripheral surface of the oil supply port is caulked intermittently or continuously and inward in the circumferential direction. A mouth caulking part is formed, and the oil filler caulking part is engaged with the unit engaging step from above, so that it is integrated with the oil filler port, and the cover unit is in contact with the outer peripheral surface of the upper oil filler port. The cover surface is externally fitted to the oil supply port until the unit plane with the oil supply port opening is in contact with the upper edge of the upper peripheral surface of the oil supply port, and the cover surface is intermittently and inwardly caulked in the circumferential direction. By forming a caulking portion and engaging the unit caulking portion with the upper engagement step from below, the unit can be integrated with the fuel filler opening.

  The fuel filler closing device of the present invention uses caulking as a connecting means, integrates the closing unit into the fuel filler so as not to be separated, and integrates the cover unit into the fuel filler so as to separate when a certain level of impact is applied. . The closing unit is inserted into the oil supply port until the annular step on the unit peripheral surface engages with the lower engagement step, and the upper oil supply port upper peripheral surface is intermittently or continuously and inwardly caulked in the circumferential direction. By engaging the mouth caulking portion with the unit engagement step from above, it is prevented from deviating upward from the fuel filler port, and is integrated with the fuel filler port so as not to be separated. Further, the cover unit is fitted over the oil filler port until the unit plane provided with the oil filler port contacts the upper peripheral edge of the upper peripheral surface of the oil filler port, and the cover peripheral surface is intermittently and internally connected in the circumferential direction. By engaging the caulking part of the unit that is caulked in the direction with the upper engagement step from below, the upper engagement step is applied when a sufficient impact is applied to apply sufficient force to plastically deform the unit caulking portion. So that the unit caulking portion is disengaged from the oil filler opening.

  In order to facilitate the caulking work, it is sufficient to intermittently form the filler filler caulking portion in the circumferential direction. In this case, the closing unit is intermittently provided in the circumferential direction with an oil filler caulking piece sandwiched between a pair of slits extending from the upper edge of the upper peripheral surface of the oil inlet, and the oil inlet caulking pieces are individually directed inwardly. It is preferable to caulk to form an oiling port caulking portion and engage the oiling port caulking portion with a unit engagement step of the oiling port from above. Similarly, the cover unit is provided with unit caulking pieces intermittently and inwardly in the circumferential direction surrounded by U-shaped cut grooves formed on the covering peripheral surface, and the unit caulking pieces are individually inwardly arranged. It is preferable that a unit caulking portion is formed and the unit caulking portion is engaged with the upper engagement step of the fuel filler port from below. It is preferable to provide three or more of these filler opening caulking pieces or unit caulking pieces at equal intervals in the circumferential direction.

  Further, to engage the unit caulking portion and the upper engagement step so that the engagement of the unit caulking portion with respect to the upper engagement step is released when the fuel filler closing device receives an impact of a certain level or more, It is preferable that the oil filler port has an upper engagement step as a tapered peripheral surface with respect to the lower peripheral surface of the fuel filler port, instead of a right-angle cross-section where the unit caulking portion cannot be engaged and overcome. As a result, the force (F) that pushes up the cover unit is distributed to a sine component force (F × sin θ) that pushes the unit caulking portion outward in the radial direction according to the taper angle (θ). When the force of the impact received exceeds a certain level, the unit caulking portion is plastically deformed and pushed open to the upper engagement step, and the unit caulking portion is disengaged from the upper engagement step.

  Further, the cover unit may be configured to have a long covering peripheral surface extending downward beyond a seal ring attached to the unit peripheral surface of the closing unit integrated with the fuel filler opening. The covering peripheral surface of the cover unit is located at the outermost shell in the fuel filler closing device of the present invention, and an external impact is likely to be applied to the covering peripheral surface first. From this, by absorbing the impact force as the force of plastic deformation of the cover surface, the degree of transmission to the oil filler port located inside the cover surface and further to the seal ring mounted on the unit surface of the closure unit is reduced. In addition, the deterioration of the sealing performance can be suppressed by preventing deformation of the oil filler port and the seal ring.

  The oil supply port closing device of the present invention integrates the closing unit into the oil supply port so that it cannot be separated by using caulking as a connecting means, and integrates the cover unit into the oil supply port so that it is separated when a certain impact is applied. Thus, the closing unit and the cover unit can be connected via the fuel filler opening. The caulking used as the connecting means is easy to process, and is solid when the closing unit is integrated with the filler port, and is separated by making the upper engaging step into a tapered surface when the cover unit is integrated with the filler port. There is an advantage that the impact can be adjusted and integrated.

  In addition, the structure in which the closing unit is inserted into the oil supply port and the cover unit is externally fitted to the oil supply port realizes high sealing performance, especially by pressing the seal ring mounted on the peripheral surface of the closing unit against the oil supply port. On the other hand, the cover ring that fits over the oil filler port is extended to the lower side beyond the seal ring, so that the seal ring sandwiched between the lower peripheral surface of the oil filler port and the unit peripheral surface receives external force. And the sealing performance can be easily maintained. In particular, the covered peripheral surface below the upper peripheral surface of the filler port is spaced radially outward from the lower peripheral surface of the filler port, so even if the peripheral surface is plastically deformed, the lower peripheral surface of the filler port The possibility of pushing is low and the chance of the seal ring being deformed is greatly reduced.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of a fuel filler closing device assembled by applying the present invention, FIG. 2 is an exploded perspective view of the fuel filler closing device of this example, and FIGS. FIG. 3 is a cross-sectional view corresponding to FIG. 1 showing an assembly procedure of the apparatus, FIG. 3 is a stage in which the closing unit 2 is fitted into the fuel filler opening 1, FIG. 4 is a stage in which the closing unit 2 is fixed to the fuel filler opening 1, and FIG. FIG. 6 is a step of fixing the cover unit 4 to the oil supply port 1 to which the closing unit 2 is fixed, and FIG. 7 is a step of fixing the cover unit 4 of the oil supply port closing device of this example. FIG. 2 is a cross-sectional view corresponding to FIG.

  First, the configuration of the fuel filler closing device of this example will be described. The fuel filler closing device of this example is composed of a fuel filler 1, a closing unit 2, and a cover unit 4 as seen in FIGS. The closing unit 2 is pushed down by an oil supply nozzle 7 inserted from an oil supply opening 44 of the cover unit 4, and a flapper 3 that opens a guide opening 211 is attached. Further, the cover unit 4 pivots the cover 5 that can be rotated upward on the unit plane 43 to open and close the fuel filler opening 44. The cover 5 is integrated with the cover unit 4 by fixing a mounting plate 56 on which the rotation shaft 511 of the cover main body 51 is attached to the unit plane 43. For this reason, in the assembly procedure of the fuel filler closing device, the cover 5 can be secured to the cover unit 4 after the cover unit 4 is covered and fixed to the fuel filler 1.

  The oil filler port 1 is a cylindrical member integrally formed by drawing from a single plate material. The upper end opening is wide, but the connection port 11 which is the lower end opening is narrowed in accordance with the oil supply pipe body 8 to be connected. Yes. The oil supply port 1 of this example forms a lower engagement step 12 through a frustum-shaped enlarged diameter portion above the connection port 11, and a cylindrical oil supply in a range of a certain height from the lower engagement step 12. A lower-stage peripheral surface 13 is provided, a frustum-shaped upper engagement step 14 is formed above the lower-stage peripheral surface 13 of the filler port, and an upper-stage peripheral surface 15 of the filler port is within a certain height range from the upper-engagement step 14. Is provided. On the upper peripheral surface 15 of the fuel filler opening, four fuel filler crimping pieces 161 are provided at intervals of 90 degrees in the circumferential direction. The filler filler caulking piece 161 is sandwiched between a pair of slits 162 aligned in the circumferential direction with the width of the unit engagement step 23, and can be pushed down inward in the radial direction. The fuel filler caulking portion 16 is formed by pushing down each oil filler caulking piece 161 inward in the radial direction.

  The closing unit 2 is a resin block that forms a nozzle guide 21 that guides a fuel nozzle inserted from a fuel inlet opening 44, and a flapper 3 that opens and closes a guide opening 211 corresponding to the bottom of the nozzle guide 21 is integrally assembled. The unit peripheral surface 22 is a cylindrical side surface equal to the inner diameter of the lower oil supply port lower peripheral surface 13, and a ring fitting groove 221 is provided near the upper edge to fit the seal ring 222. When the closing unit 2 is inserted into the fuel filler port 1, the seal ring 222 presses against the lower circumferential surface 13 of the fuel filler port so as to close the gap and secures the sealing performance except for the guide opening 211. Further, the unit peripheral surface 22 is provided with four unit engagement steps 23 at the upper edge at intervals of 90 degrees in the circumferential direction, and an annular step 24 is provided below. The unit engagement step 23 is a portion for engaging the fuel filler caulking portion 16, and the annular step 24 is a portion for engaging the lower engagement step 12 of the fuel filler 1.

  As described above, the cover unit 4 is a covering member provided with an oil filler opening 44 to be opened and closed of the cover 5, and surrounds the unit plane 43 for mounting the mounting plate 56 of the cover 5 and the unit plane 43. And a covering peripheral surface 41. The filler opening 44 folds the annular flange from the radially inward to the downward to form the latch receiver 441 and engages the latch 531 to keep the cover 5 closed. The cover unit 4 is a base member for attaching the cover 5 to the fuel filler opening 1 and is also a protective member having a covered peripheral surface 41 that protects the seal ring 222 of the closing unit 2 as will be described later.

  The covering peripheral surface 41 is covered with the cover unit 4 until the unit plane 43 comes into contact with the upper peripheral edge (in this example, the spacer 6 interposed between the closing unit 2 and the cover unit 4). Are fitted on the fuel filler opening 1, and four unit caulking pieces 421 are provided at intervals of 90 degrees in the circumferential direction on the circumferential surface whose lower edge exceeds the seal ring 222. Thereby, the impact from the outside is absorbed by the deformation of the covering peripheral surface, the possibility that the seal ring 222 is deformed is reduced, and the sealing performance of the fuel filler port 1 is secured. The unit caulking piece 421 is surrounded by a U-shaped cut groove 422 on the left and right and above, and can be pushed inward in the radial direction. The unit caulking portion 42 is formed by pushing each unit caulking piece 421 in the radial direction.

  The cover 5 is a member that opens and closes the fuel filler opening 44. In the fuel filler port 1 provided with the fuel filler closing device as in this example, the essential oil supply path blocking portion is the flapper 3 that opens and closes the guide opening 211, and the cover 5 is not an essential member. However, as is clear from FIG. 1, the nozzle guide 21 needs to have a certain length because of the relationship of guiding the fueling nozzle, and a recess is inevitably formed from the fueling port opening 44 to the guide opening 211. When the mouth opening 44 is in a state where it can be seen from the outside, rainwater and dust collect in the guide opening 211, and when the flapper 3 is opened, the rainwater and dust may enter the fuel supply pipe body 8. The cover 5 has a function of preventing such rainwater and dust from collecting in the guide opening 211.

  In the cover 5 of this example, a slider 53 having a latch 531 is attached to a cover main body 51 in which a cover rotating arm 519 is attached to a rotating shaft 511 supported by a mounting plate 56. The slider 53 is movably mounted in a state of being urged in the direction of engagement with the latch receiver 441, and the slider 53 is pressed by the slider presser 52. In this example, the distance between the pair of outer protrusions 521 provided on the slider presser 52 is narrower than the light oil supply nozzle and wider than the gasoline supply nozzle, while the distance between the pair of inner protrusions 533 provided on the slider 53 is the gasoline interval. By selecting the oil supply nozzle for opening the cover 5 so that only the oil supply nozzle for gasoline pushes the slider 53, the latch 531 can be disengaged from the latch receiver 441, It prevents the mistake of refueling.

  In addition, in the fuel filler closing device of this example, a spacer 6 made of a single plate material is interposed between the closing unit 2 and the cover unit 4. The spacer 6 is provided with a nozzle retaining opening 61 that is slightly smaller than the upper end opening of the nozzle guide 21 and engages and holds the inserted oil supply nozzle. The spacer 6 is also a protective member that prevents the closure unit 2 of the present example made of resin from being damaged. The spacer 6 of this example is provided with spacer retainers 62 that are L-shaped flanges having a cross section of the width of the unit engagement step 23 at four positions at intervals of 90 degrees in the circumferential direction. As a result, the filler press caulking piece 161 is folded and pressed in a state where the spacer presser 62 is placed on the unit engaging step 23 of the corresponding closing unit 2, thereby being integrated with the filler port 1 and the closing unit 2. The

  Next, the assembly procedure of the fuel filler closing device of this example will be described. First, as seen in FIG. 3, the closing unit 2 is inserted into the fuel filler opening 1, and the spacer 6 is brought into contact with the upper surface of the closing unit 2. The closing unit 2 is inserted into the oil filler port 1 until the annular step 24 is engaged with the lower engagement step 12, the unit peripheral surface 22 is brought into contact with the lower oil supply port lower peripheral surface 13, and in particular, the seal ring 222 is connected to the oil filler port. Press against the lower peripheral surface 13 to realize the sealing property of the oil filler port 1. At this time, the closing unit 2 with respect to the fuel filler opening 1 is positioned in the circumferential direction by making the unit engagement step 23 coincide with the oil filler crimping piece 161. The spacer 6 is positioned in the circumferential direction by fitting the spacer presser 62 into the unit engaging step 23 of the closing unit 2.

  When the closing unit 2 is inserted into the filler port 1 and the spacer 6 is placed on the closure unit 2, as shown in FIG. 4, the filler port caulking piece 161 (see FIG. 2) is bent inward in the radial direction. By forming the oil filler caulking portion 16 that is engaged so as to press the unit engagement step 23 from above with the spacer presser 62 interposed therebetween, the integration of the oil filler port 1, the closing unit 2, and the spacer 6 is completed. As described above, the unit engagement step 23, the spacer presser 62, and the oil filler caulking pieces 161 have the same width in the circumferential direction, and are provided at four locations at intervals of 90 degrees in the circumferential direction. By bending 161 to form the oil filler caulking portion 16, the mutual positional relationship in the circumferential direction is also specified. Thus, the formation of the oil filler caulking portion 16 has a function of specifying the mutual positional relationship in the circumferential direction in addition to the integration of the oil filler 1, the closing unit 2 and the spacer 6.

  Next, the cover unit 4 is covered and integrated with the oil filler opening 1 in which the closing unit 2 is inserted and integrated. In this example, as shown in FIG. 5, the cover unit 4 having a structure in which the cover 5 is attached to the cover unit 4 in advance is put on the fuel filler port 1, but as described above, only the cover unit 4 is covered first. The cover 5 may be separately attached to the oil supply port 1 afterwards. Here, the cover unit 4 with respect to the fuel filler port 1 has no particular engaging part and is not positioned in the circumferential direction as it is, but the fuel filler mouth crimping portion 16 looks through the notch groove 422 surrounding the unit crimping piece 421. Positioning in the circumferential direction can be achieved with reference to the fuel filler caulking portion 16.

  The cover unit 4 has the covering peripheral surface 41 in contact with the outer side of the upper peripheral surface 15 of the filler opening, and the upper edge of the upper peripheral surface 15 of the fuel filler (strictly speaking, the spacer 6 interposed between the closing unit 2). The covering peripheral surface 41 is externally fitted to the filler opening 1 until the unit flat surface 43 abuts. Then, as shown in FIG. 6, the unit caulking portion 42 formed by pushing the unit caulking piece 421 inward in the radial direction is engaged with the upper engagement step 14 of the oil filler 1 from below, so that the oil filler port 1 and integrated. The unit caulking portion 42 of this example is formed by pushing the unit caulking piece 421 inward in the radial direction while maintaining an upright posture. In addition, the unit caulking portion 421 may be tilted by pushing the upper portion of the unit caulking piece 421 inward in the radial direction, and the unit caulking portion 42 that engages the upper engaging step 14 with the upper portion may be formed.

  Thus, the fuel filler closing device of the present invention uses caulking as a connecting means for the closing unit 2 and the cover unit 4 to the fuel filler 1. However, the closing unit 2 with respect to the fuel filler opening 1 is integrated so as not to be separated, but the cover unit 4 with respect to the fuel filler opening 1 can be separated when an impact of a certain level or more is applied. As a result, the cover unit 4 is detached from the fuel filler port 1 when an external impact of a certain level or more (impact that causes the unit caulking portion 42 to be plastically deformed) is applied, and as the cover unit 4 moves, the fuel filler port 1 and the fuel pipe The possibility that the main body 8 is dragged is eliminated. At this time, since the flapper 3 in the closing unit 2 closes the guide opening 211, the sealing property of the fuel supply pipe is maintained, so that there is no possibility that the fuel leaks to the outside.

  The cover unit 4 is detached from the fuel filler port 1 by plastic deformation in the process in which the unit caulking portion 42 gets over the upper engagement step 14. This is because if the taper angle θ (see FIG. 7) of the upper engagement step 14 with respect to the lower peripheral surface 13 of the oil supply port is adjusted, the unit caulking portion 42 can be easily plastically deformed, that is, the cover unit 4 can be This means that it is possible to adjust the magnitude of the external impact force that deviates from the above. The unity between the filler port 1 and the cover unit 4 is sufficiently secured, and the taper angle (θ) that the cover unit 4 is detached from the filler port 1 only when a certain level of impact is applied is the material or plate of the cover unit 4 Although it depends on the thickness, it may be about 0 to 80 degrees (excluding 0 degrees), more preferably 30 to 60 degrees.

  Further, the cover unit 4 extends the covering peripheral surface 41 to the lower side beyond the seal ring 222 attached to the closing unit 2, thereby applying the impact force applied to the cover unit 4 from the outside to cause plastic deformation of the peripheral surface 41. It absorbs as a force and reduces the degree of transmission to the oil filler 1 located inside the covering peripheral surface 41 and further to the seal ring 222 attached to the closing unit 2, and prevents deformation of the oil filler 1 and the seal ring 222. Yes. As a result, the closing unit 2 can maintain the state in which the seal ring 222 is pressed against the lower circumferential surface 13 of the fuel filler port 1 and can suppress the deterioration of the sealing performance.

It is sectional drawing showing an example of the fuel filler closing device assembled | attached applying this invention. It is a disassembled perspective view of the fuel filler closing device of this example. FIG. 2 is a cross-sectional view corresponding to FIG. 1 illustrating a stage in which the closing unit is fitted into the fuel filler opening. FIG. 2 is a cross-sectional view corresponding to FIG. 1 illustrating a stage of fixing a closing unit to a fuel filler opening. FIG. 2 is a cross-sectional view corresponding to FIG. 1 illustrating a stage in which a cover unit is put on a fuel filler opening to which a closing unit is fixed. FIG. 2 is a cross-sectional view corresponding to FIG. 1 illustrating a stage of fixing a cover unit to a fuel filler opening to which a closing unit is fixed. FIG. 2 is a cross-sectional view corresponding to FIG. 1 illustrating a state in which a cover of the fuel filler closing device of the present example is closed.

Explanation of symbols

1 Refueling port
11 Connection port
12 Lower engaging step
13 Lower peripheral surface of oil filler
14 Upper engagement step
15 Upper surface of oil filler
16 Filling port caulking part 2 Closing unit
21 Nozzle guide
22 Unit surface
23 Unit engagement step
24 annular step 3 flapper 4 cover unit
41 Covered surface
42 Unit caulking section
43 Unit plane
44 Refueling port opening 5 Cover
51 Cover body
52 Slider presser
53 Slider
56 Mounting plate 6 Spacer
61 Nozzle latch opening
62 Spacer holder 8 Lubrication pipe body θ Taper angle to lower circumferential surface

Claims (4)

In the filler opening closing device that pushes the flapper that is biased upward and closed the guide opening by the filler nozzle inserted from the filler opening to the guide opening,
A closing unit having a guide opening that opens and closes by a flapper that can rotate downward is inserted into the filler opening, and a cover unit having an opening and closing opening that is freely openable is fitted to the filler opening.
The oil filler port forms a lower engagement step that is expanded above the connection port with the oil supply pipe main body, forms a lower step peripheral surface of the fuel filler port above the lower engagement step, and from the lower step peripheral surface of the fuel filler port Forming an upper engagement step that expands upward, forming an upper peripheral surface of the fuel filler port above the upper engagement step;
The closing unit forms a unit engagement step that is inscribed in the upper peripheral surface of the fuel filler opening,
The cover unit has a covering peripheral surface that is fitted on the upper peripheral surface of the fuel filler opening,
The closing unit is inserted into the oil supply port until the annular step on the unit peripheral surface engages with the lower engagement step, and the upper peripheral surface of the oil supply port is caulked intermittently or continuously and inward in the circumferential direction. And by engaging the oil filler caulking portion with the unit engagement step from above, it is integrated with the oil filler opening,
The cover unit has a covered peripheral surface that is in contact with the outside of the upper peripheral surface of the oil filler port, and the cover peripheral surface is externally fitted to the oil filler port until a unit plane that has an oil inlet opening on the upper edge of the upper peripheral surface of the oil filler port contacts. Then, the covering peripheral surface is intermittently and inwardly caulked in the circumferential direction to form a unit caulking portion, and the unit caulking portion is engaged with the upper engagement step from below to be integrated with the oil filler port. A fuel filler closing device. The closing unit is intermittently provided in the circumferential direction with an oil filler caulking piece sandwiched between a pair of slits extending from the upper edge of the upper peripheral surface of the oil filler inlet, and the oil inlet caulking pieces are individually caulked inwardly. The fuel filler closing device according to claim 1, wherein a fuel filler crimping portion is formed, and the fuel filler crimping portion is engaged with a unit engagement step of the fuel filler from above. The cover unit is provided with unit caulking pieces intermittently and inwardly in the circumferential direction surrounded by U-shaped cut grooves carved on the covering peripheral surface, and the unit caulking pieces are caulked inward individually. The oil filler closing device according to claim 1 or 2, wherein a caulking portion is formed and the unit caulking portion is engaged with an upper engaging step of the oil filler from below. The oil supply port closing device according to any one of claims 1 to 3, wherein the cover unit has a long covering peripheral surface extending downward beyond a seal ring attached to a unit peripheral surface of the closing unit integrated with the oil supply port.

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