JP6405508B2 - Fuel supply device and method of assembling the same - Google Patents

Description

  The present invention relates to a fuel fueling device provided in a fueling port of a vehicle and an assembling method thereof, and more particularly, to a configuration of a cap nut for screwing a fuel cap.

  The fuel refueling device accepts a fueling nozzle (fueling gun) inserted from the outside of the vehicle and enables fueling to a fuel tank installed in the vehicle body, and at one end is a receiving port for the fueling gun. A fuel inlet is formed, and a fuel pipe connected to the fuel tank is connected to the other end. A fuel cap for preventing leakage of fuel stored in the fuel tank is detachably attached to the fuel inlet of the fuel refueling device.

  9 and 10 show a first example of a conventionally known fuel supply apparatus. As shown in these drawings, the fuel refueling device 100 according to the first conventional example is disposed in the retainer 110 to which the fuel cap A is attached, the filler neck 120 to which the fuel pipe B is connected, and the filler neck 120. A gun guide member 130 and an O-ring 140 disposed between the inner peripheral surface of the retainer 110 and the outer peripheral surface of the filler neck 120 (paragraphs 0015 to 0019 of Patent Document 1 and FIG. 2). FIG. 3). In addition, the code | symbol A1 in a figure has shown the knob of the fuel cap A. FIG.

  The retainer 110 is formed in a cylindrical shape with a metal material. A flange-like fuel inlet 111 is formed at one end, and a large-diameter filler neck connecting portion 112 is formed at the other end. Further, between the fuel inlet 111 and the filler neck connecting portion 112, a thin cap mounting portion 114 having an internal thread 113 is formed. The female screw 113 is formed so as to protrude to the inner surface side of the cap mounting portion 114. The filler neck 120 is formed in a pipe shape with a resin material. An engagement recess 121 for locking the gun guide member 130 so as not to rotate is formed at one end, and a stepped groove 122 for connecting the fuel pipe B is formed at the other end. Furthermore, an annular groove 123 for mounting the O-ring 140 is formed on the outer peripheral surface in the vicinity of the engaging recess 121. The gun guide member 130 is formed in a funnel shape with a metal material, and an engagement convex portion 131 that can be engaged with an engagement concave portion 121 formed in the filler neck 120 is formed at the end on the large diameter side. Has been.

  When assembling the fuel supply apparatus 100, the gun guide member 130 is inserted into the inner space from one end of the filler neck 120 from the small diameter side, and the gun guide is inserted into the engagement recess 121 formed at one end of the filler neck 120. The engagement convex part 131 formed in the member 130 is engaged. Further, the O-ring 140 is attached to the annular groove 123 formed on the outer peripheral surface of the filler neck 120. Next, the gun guide member mounting side of the filler neck 120 is inserted into the filler neck connecting portion 112 formed on the retainer 110, and the end of the filler neck 120 is inserted between the filler neck connecting portion 112 and the cap mounting portion 114. The O-ring 140 is brought into close contact with the inner surface of the large-diameter portion of the retainer 110. Thereby, the assembly of the fuel supply apparatus 100 is completed.

  In the fuel oil supply device 100 according to the first conventional example, the cap mounting portion 114 having the female screw 113 is formed on the retainer 110, so that the fuel cap A having a female screw that can mesh with the female screw 113 can be detachably mounted.

  11 and 12 show a second example of a conventionally known fuel supply apparatus. As shown in these drawings, the fuel supply device 200 according to the second conventional example includes a metal retainer 210 to which the fuel cap A is attached, a resin filler neck 220 to which the fuel pipe B is connected, and a filler. It is mainly composed of a resin nozzle guide member 230 disposed in the neck 220 (see paragraphs 0011 to 0020 and FIGS. 1 and 2 of Patent Document 2). In addition, the code | symbol A1 in a figure has shown the knob of the fuel cap A. FIG.

  The retainer 210 is formed in a cap shape that can be attached to the tip of the filler neck 220, and the retainer 210 is positioned in the circumferential direction of the filler neck 220 between the retainer 210 and the retainer attachment portion of the filler neck 220. Therefore, a retaining mechanism (not shown) including an engaging portion and an engaged portion is provided. A female screw 221 for screwing a male screw S formed on the fuel cap A is formed on the inner surface of the filler neck 220 on the fuel cap mounting side. Further, a breather pipe 222 is branched from the side wall of the filler neck 220. The breather pipe 222 is for returning the fuel vapor in the fuel tank to the filler neck 220 so that the fuel can be smoothly supplied. The breather pipe 222 is connected to the fuel tank via the fuel vapor pipe C. In addition, the code | symbol 223 in a figure shows the stepped groove | channel for connecting the one end part of the fuel tube B, and the code | symbol 224 in the figure shows the stepped groove | channel for connecting the one end part of the fuel vapor pipe C. ing. The nozzle guide member 230 is formed in a funnel shape, and an engagement convex portion 231 that can be engaged with an engagement concave portion (not shown) formed in the filler neck 220 is formed at the end of the large diameter side. Yes.

  When assembling the fuel supply apparatus 200, the nozzle guide member 230 is inserted into the inner space from one end of the filler neck 220 from the small diameter side, and the nozzle guide is inserted into an engagement recess (not shown) formed on the inner surface of the filler neck 220. The engaging convex part 231 formed in the member 230 is engaged. Thereby, the nozzle guide member 230 is attached to the filler neck 220 while being positioned in the circumferential direction. Next, the engaging portion and the engaged portion formed between the retainer 210 and the filler neck 220 are engaged with each other, and the retainer 210 is attached to the distal end portion of the filler neck 220. Accordingly, the retainer 210 is attached to the filler neck 220 while being positioned in the circumferential direction. Next, the mounting portion of the retainer 210 is heated from the outside, and a part of the tip portion of the filler neck 220 is melted. Accordingly, the molten resin flows along the engaging portion formed in the retainer 210 and becomes an engaged portion of the engaging portion after solidification, so that the retainer 210 can be fixed to the filler neck 220. The fuel supply apparatus 200 according to the second conventional example is assembled by the above-described procedure.

  In the fuel supply apparatus 200 according to the second conventional example, the retainer 210 can be fixed to the filler neck 220 without using insert molding or the like, so that the production cost can be reduced.

JP2013-023168A JP 2014-104919 A

  However, the fuel refueling device 100 according to the first conventional example described in Patent Document 1 is formed by forming a female thread 113 on a metal retainer 110, so that a high-precision processing machine and a complicated machine are required for manufacturing the retainer 110. It requires processing steps, expensive molds, material selection to achieve complex screw shapes, and skilled manufacturing techniques. In addition, since both the retainer 110 and the gun guide member 130 are formed of a metal material, the fuel refueling device 100 that is a product increases in weight.

  On the other hand, in the fuel refueling device 200 according to the second conventional example described in Patent Document 2, the female screw 221 for screwing the male screw S formed on the fuel cap A is formed integrally with the filler neck 220. The direction of the knob A1 when the fuel cap A is closed with respect to the filler neck 220 is limited to a specific direction. Since the setting position and orientation of the filler neck 220 with respect to the vehicle body are determined for each vehicle type, after all, the fuel refueling device 200 according to the second conventional example has the orientation of the knob A1 when the fuel cap A is closed with respect to the vehicle body. There is a problem that it can be applied only to a specific vehicle type to which

  This point will be described in more detail with reference to the drawings. Depending on the type of vehicle, there is a fuel cap disposed on the right side of the vehicle body and a fuel cap disposed on the left side. In addition, depending on the vehicle type, there is a case where the direction of the knob A1 when the fuel cap A is closed is horizontal with respect to the vehicle body, and a case where it is vertical. And when using the fuel supply apparatus 200 provided with the filler neck 220 from which the breather pipe | tube 222 branched from the side wall like the fuel supply apparatus 200 which concerns on a 2nd prior art example, in order to aim at the safety at the time of a rear-end collision, a breather It is required to arrange the pipe 222 toward the front side of the vehicle body. FIG. 13A shows the knob A1 when the fuel cap A is closed with the fuel cap A facing the right side of the vehicle body and the breather pipe 222 branched from the filler neck 220 facing the front side of the vehicle body. The case where the fuel supply apparatus 200 in which the direction is horizontal is provided in the vehicle body is shown. If the fuel supply device 200 of this configuration is applied to a vehicle type in which the fuel cap A is arranged toward the left side of the vehicle body, the orientation of the knob A1 when the fuel cap A is closed as shown in FIG. Is inclined with respect to the vehicle body, it cannot be applied to a vehicle in which the orientation of the knob A1 is required to be horizontal. Therefore, it is necessary to prepare two types of fuel refueling apparatuses having different filler necks 220 for the vehicle in which the fuel cap is disposed toward the right side of the vehicle body and the vehicle in which the fuel cap is disposed toward the left side. For the same reason, it is necessary to prepare different types of fuel refueling devices for vehicle types that require the orientation of the knob A1 to be horizontal when the fuel cap A is closed and for vehicle types that are required to be vertical. .

  The direction of the knob A1 when the fuel cap A is closed can be adjusted by shifting the position of the screwing start point 221a (see FIG. 11) of the male screw S in the female screw 221 in the circumferential direction of the filler neck 220. That is, in the fuel supply apparatus 200 according to the second conventional example, since the female screw 221 is formed on the filler neck 220, the entire filler neck 220 needs to be remade in order to shift the screwing start point 221a of the female screw 221. is there. However, since the filler neck 220 is large and complicated in structure, it is an expensive part. If various filler necks 220 having different screwing start points 221a are prepared, the fuel supply device becomes expensive.

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a fuel supply apparatus having versatility that can be easily applied to various vehicles with light weight and low cost. Is to provide.

  In order to solve such a technical problem, the present invention relates to a fuel refueling device, and is arranged inside the vehicle body with the insertion port of the fueling nozzle facing the fueling port opened in the vehicle body. In a fuel refueling device in which a fuel cap is detachably attached to a port, a cap nut for screwing the fuel cap is a filler pipe having an insertion port for the fueling nozzle, one end is connected to the filler pipe, and the other end is a fuel A filler neck to which a pipe is connected and a nozzle guide disposed between the cap nut and the filler neck are formed as independent separate bodies.

  In this way, when the cap nut is formed separately from the filler pipe, the nozzle guide and the filler neck, the cap nut can be manufactured as a small and low-cost part, and the cap nut mounting position with respect to the filler neck can be manufactured. The degree of freedom can be increased. Since the cap nut is a part having a female screw for screwing the male screw formed on the fuel cap, the cap nut is attached to the filler neck in the circumferential direction by shifting the mounting position of the cap nut in the circumferential direction of the filler cap. The direction of the fuel cap knob can be changed as appropriate. Therefore, the versatility of the fuel refueling device is enhanced, and it is possible to cope with various vehicles in which the direction of the fuel cap knob is different when the fuel cap is closed. Further, as described above, since the cap nut can be manufactured as a small and low-cost component, a fuel supply apparatus having excellent versatility can be implemented at low cost. Furthermore, if the filler pipe and the cap nut are formed as separate bodies, the structure of the filler pipe can be inevitably simplified, so high precision processing machines, complicated processing steps, expensive molds and It is possible to facilitate the manufacture of the filler pipe without requiring a skilled manufacturing technique, and to reduce the cost of the fuel supply device. Furthermore, if the filler pipe and the cap nut are formed as separate bodies, the filler pipe and the cap nut can be formed using different materials. Scratch resistance and impact resistance against collision with the fueling nozzle can be maintained at the same level as the conventional product, and durability and reliability of the fueling device can be maintained. In addition, since the filler pipe can be inevitably reduced in size, the fuel supply device can be reduced in weight.

  According to the present invention, in the fuel supply apparatus having the above-described configuration, the cap nut is a resin molded product or a die-cast molded product.

  Thus, when the cap nut is a resin molded product or a die-cast molded product, the cap nut can be manufactured at a lower weight and at a lower cost compared to the case where the cap nut is formed using a pressed product of a metal material. The weight and cost of the device can be reduced.

  According to the present invention, in the fuel refueling device having the above-described configuration, a screw thread for screwing the fuel cap is formed in a circumferential direction of the inner surface of the cap nut, and the circumferential length of the screw thread is defined as the cap length. It is characterized by being formed shorter than the length of one round of the inner surface of the nut.

  If the circumferential length of the screw thread is less than or equal to the length of one circumference of the inner surface of the cap nut, a cap nut made of resin can be formed using an injection molding machine equipped with a normal two-part mold. Productivity can be increased, and the cost of the cap nut and thus the fuel supply system can be further reduced.

  Further, the present invention provides the fuel refueling device having the above-described configuration, for preventing rotation between the cap nut and the nozzle guide, between the cap nut and the filler neck, and between the nozzle guide and the filler neck, respectively. The engagement convex part and the engagement concave part are formed.

  As described above, when the engaging convex portion and the engaging concave portion for preventing rotation are formed between the respective members constituting the fuel supply apparatus, the respective members can be assembled quickly and without error. Cost can be reduced. Further, in the case where an engagement convex portion or an engagement concave portion for preventing rotation between the filler neck and the cap nut is formed on the cap nut, the engagement convex portion or the engagement with respect to the screwing start point of the female screw formed on the cap nut. By producing various cap nuts having different formation positions of the mating recesses, it is possible to assemble a fuel supply apparatus having a different arrangement of the internal thread with respect to the filler neck without changing the shape of the filler neck. Therefore, the fuel supply apparatus excellent in versatility can be implemented at low cost.

  According to the present invention, in the fuel supply apparatus having the above-described configuration, the filler neck is formed of a conductive resin material.

  As described above, when the filler neck is formed of a conductive resin material, the grounding operation of the fuel supply device can be facilitated, so that the operation of attaching the fuel supply device to the vehicle can be made efficient.

  According to the present invention, in the fuel supply apparatus having the above-described configuration, the nozzle guide is formed of a resin material.

  The nozzle guide can be made of metal or resin. If a metal nozzle guide is used, it can be expected to have high impact resistance, but the metal material for the nozzle guide is heavier and more expensive than the resin material for the nozzle guide, and the processing cost is also expensive. Therefore, the fuel refueling device as a product becomes heavy and expensive. On the other hand, when the resin nozzle guide is used, the nozzle guide can be manufactured at a low cost and at a low cost, and thus the fuel supply device can be reduced in weight and cost. Further, if an appropriate resin material is selected, practically sufficient impact resistance can be achieved.

  On the other hand, the present invention relates to a method of assembling a fuel supply device, a filler pipe having an insertion port for a fuel supply nozzle, a cap nut formed with a female screw for screwing a fuel cap, and one end connected to the filler pipe. An assembly method for a fuel supply device in which a filler fuel neck connected to a fuel pipe at the other end and a nozzle guide disposed between the cap nut and the filler neck are combined together to assemble a required fuel supply device. The cap nut is formed separately from the filler pipe, the nozzle guide, and the filler neck, and the filler neck is 1 for preventing rotation of the cap nut with respect to the filler neck. Use one type of filler neck with one or a set of engaging projections or engaging recesses In addition, the cap nut includes one or one set of engaging convex portions or engaging concave portions that are engaged with one or one set of engaging convex portions or engaging concave portions formed on the filler neck. A plurality of types of cap nuts formed at different positions with respect to the female screw forming position are prepared, and the one type of filler neck and one type of cap nut selected from the plurality of types of cap nuts are combined. A fuel refueling device having a different arrangement of the female screw with respect to the filler neck is assembled.

  As a filler neck, one type of filler neck formed with one or a set of engaging convex portions or engaging concave portions for preventing the cap nut from rotating is prepared, and the cap nut is formed on the filler neck as a cap nut. A plurality of one or one set of engaging convex portions or engaging concave portions engaged with one or one set of engaging convex portions or engaging concave portions formed at different positions with respect to the female screw forming position. When the types of cap nuts are prepared, by combining these one type of filler neck and one type of cap nut selected from a plurality of types of cap nuts, it is possible to assemble a fuel supply device having a different arrangement of the internal thread with respect to the filler neck. it can. Therefore, it is possible to change the direction of the fuel cap knob at the time of closing the fuel cap without changing the expensive filler neck, so that the versatility of the fuel supply device can be improved. Can be applied to various vehicles at low cost.

  According to the present invention, in the method of assembling the fuel supply apparatus having the above-described configuration, the filler neck includes a breather pipe branched from a side wall.

  When the breather pipe is formed in the filler neck, the fuel vapor in the fuel tank can be returned to the filler neck, so that the fuel flow is not hindered by the presence of the fuel vapor, and the fuel supply from the fuel supply device to the fuel tank is smoothly performed. Can be done. In addition, the filler neck formed with the breather pipe has the opposite direction of the breather pipe with respect to the vehicle body when the fuel refueling device is disposed on the right side of the vehicle body and when it is disposed on the left side. By changing the mounting position of the cap nut with respect to the filler neck, the direction of the fuel cap knob at the time of closing the fuel cap can be made the same.

  According to the present invention, since the cap nut is formed separately from the filler pipe, the nozzle guide, and the filler neck, the cap nut can be manufactured as a small and low-cost component, and the filler pipe, the nozzle guide, and the filler. The freedom degree of the attachment position of the cap nut with respect to a neck can be raised. Therefore, a high-strength fuel supply device having versatility that can be used for various vehicles in which the direction of the fuel cap knob when the fuel cap is closed can be provided at a low cost and at a low cost.

It is a disassembled perspective view of the fuel supply apparatus which concerns on embodiment. It is sectional drawing of the assembly state of the fuel supply apparatus which concerns on embodiment. It is a perspective view of a filler pipe concerning an embodiment. It is a perspective view of a cap nut concerning an embodiment. It is a perspective view of the nozzle guide which concerns on embodiment. It is a perspective view of a filler neck concerning an embodiment. It is a top view which shows the various cap nut from which the formation position of the engagement convex part with respect to the formation position of an internal thread differs. It is a perspective view of the filler neck which concerns on other embodiment. It is a disassembled perspective view of the fuel supply apparatus which concerns on a 1st prior art example. It is sectional drawing of the assembly state of the fuel supply apparatus which concerns on a 1st prior art example. It is a block diagram of the fuel supply apparatus which concerns on a 2nd prior art example. It is a disassembled perspective view of the fuel supply apparatus which concerns on a 2nd prior art example. It is a figure which shows the problem of the fuel supply apparatus which concerns on a 2nd prior art example.

  Hereinafter, an embodiment of a fuel supply device according to the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the fuel supply apparatus 1 according to the embodiment includes a metal filler pipe 10, a resin cap nut 20, a nozzle guide 30, a filler neck 40, a cap protector 50, and a filler pipe. 10 and an O-ring 60 that seals the gap between the filler neck 40 and fuel pipes 63 and 64 that are connected to the filler neck 40 via O-rings 61 and 62. The filler pipe 10 is disposed at a position facing the fuel filler opening opened in the vehicle body.

  The filler pipe 10 is a component that constitutes the insertion port of the oil supply nozzle, and is formed into a cylindrical shape with a high-strength metal material such as a stainless steel plate. As shown in detail in FIG. 3, the filler pipe 10 of the present example has a fuel cap mounting portion 11 and a filler neck connecting portion 12 continuously formed in the length direction via a step portion 13, so that the fuel cap is mounted. A flange-shaped fuel cap mounting surface 14 for mounting a fuel cap A (see FIGS. 10 and 11) to prevent fuel spillage is formed at the end of the portion 11. Further, an engagement step portion 15 for engaging the filler neck 40 is formed on the inner peripheral surface on the opening end side of the filler neck connecting portion 12.

  The cap nut 20 is a part for screwing the fuel cap A to the filler pipe 10 so as to be detachable. For example, a resin material excellent in impact resistance, rigidity, dimensional stability and long life such as fiber reinforced polyamide resin. Is a resin molded product using a ring shape. Moreover, it replaces with a resin molded product and can also use die-cast molded products, such as an aluminum alloy and a magnesium alloy, for example. As shown in detail in FIG. 4, the cap nut 20 of the present example is formed with a step portion 21 for contacting the end portion of the nozzle guide 30 on the outer surface, and on one circumferential surface through the step portion 21. The two first engaging protrusions 22a and 22b functioning as rotation stopper protrusions of the cap nut 20 with respect to the filler neck 40 are formed opposite to each other. These two first engaging protrusions 22a and 22b are formed to have different lateral widths in order to restrict the mounting direction of the cap nut 20 with respect to the filler neck 40. In addition, two second engagement convex portions 23 a and 23 b that function as rotation-preventing protrusions of the nozzle guide 30 with respect to the cap nut 20 are formed on the other end face through the step portion 21 so as to face each other. These two second engaging projections 23 a and 23 b are also formed in different lateral widths in order to restrict the mounting direction of the nozzle guide 30 with respect to the cap nut 20. Further, a female screw 24 for screwing the fuel cap A is formed in the circumferential direction of the inner surface of the cap nut 20. The circumferential length of the female screw 24 is adjusted to be shorter than the length of one round of the inner surface of the cap nut 20. Thereby, since the cap nut made of resin or die-casting can be molded using the two-part mold, the productivity of the cap nut 20 can be increased, and the cost of the fuel supply device 1 can be reduced. .

  The nozzle guide 30 is a component for holding a fuel nozzle inserted from the outside of the vehicle through a fuel filler opening opened in the vehicle body at a fixed position. For example, the nozzle guide 30 has a resin material having excellent impact resistance and wear resistance such as polyacetal resin. It is formed in a funnel shape. That is, as shown in detail in FIG. 5, the nozzle guide 30 of this example includes a fuel supply nozzle insertion portion 31, a fuel introduction portion 32, and an inclined portion 33 that connects them, and an end surface of the fuel supply nozzle insertion portion 31. Are formed with two engagement recesses 34a, 34b for engaging the two second engagement projections 23a, 23b formed in the cap nut 20. These two engagement recesses 34a and 34b are formed in different sizes so that the second engagement projections 23a and 23b having different lateral widths can be individually engaged. In addition, the portion extending from the outer surface of the inclined portion 33 to the outer surface of the fuel introduction portion 32 functions as a detent protrusion of the nozzle guide 30 with respect to the filler neck 40, a rectifying plate for fuel to be supplied, and a blowback prevention member from the fuel tank. Two engagement protrusions 35a and 35b are formed in parallel. Further, a vent hole 36 is formed in a part of the inclined portion 33.

  The filler neck 40 is a part for guiding the fuel supplied from the fueling nozzle inserted into the nozzle guide 30 to the fuel tank. The filler neck 40 can be formed of a non-conductive resin material and has conductivity. It can also be formed with a resin material. When using a resin material with conductivity, the grounding operation of the fuel supply device can be facilitated more than when a non-conductive resin material is used. As shown in detail in FIG. 6, the filler neck 40 of this example is branched from the cylindrical main body 41, the fuel outlet pipe 42 having one end connected to the end of the main body 41, and the fuel outlet pipe 42. A breather pipe 43 is provided. On the end surface of the main body 41, two engagement recesses 44a and 44b for engaging the two first engagement protrusions 22a and 22b formed on the peripheral surface of the cap nut 20 are formed. Further, on the outer peripheral surface of the main body 41, a mounting groove 45 of the O-ring 60, a locking claw 46 that is engaged with the engaging step 15 formed in the filler pipe 10, and a filler neck 40 for the cap protector 50. The rotation prevention protrusion 47 and the positioning protrusion 48 of the cap protector 50 are formed. Further, a mounting groove 42a for the O-ring 61 and a drop prevention protrusion 42b for the fuel pipe 63 are formed on the outer peripheral surface of the fuel outlet pipe 42. A mounting groove for the O-ring 62 is formed on the outer peripheral surface of the breather pipe 43. 43a and a protrusion 43b for preventing the fuel pipe 64 from falling off are formed.

  The cap protector 50 is a component for protecting the oil filler opening from impact during impact and deformation of the vehicle body. For example, the cap protector 50 has a resin material excellent in impact resistance, rigidity, dimensional stability and long life such as fiber reinforced polyamide resin. , Formed in a funnel shape. That is, as shown in FIG. 1, the cap protector 50 of the present example includes a hook-shaped part 51 and a cylindrical part 52 that is continuous with the bottom surface of the hook-shaped part 51. The engagement groove 53 for inserting the anti-rotation protrusion 46 formed in the filler neck 40 is formed.

  The positions where the first engaging protrusions 22a and 22b are formed in the cap nut 20 are such that the knob A1 of the fuel cap A is required by the vehicle manufacturer when the fuel cap A is attached to the fuel refueling device 1 installed on the vehicle body. It is adjusted to face. That is, the direction of the knob A1 when the fuel cap A is closed is determined by the position of the screwing start point 24a (see FIG. 4) of the female screw 24 formed on the cap nut 20 with the male screw formed on the fuel cap A. For this reason, as previously described with reference to FIG. 13, the cap nut 20 in which the first engagement convex portions 22 a and 22 b are formed at specific positions with respect to the screwing start point 24 a is attached to the breather pipe 43. When the filler neck 40 is formed with engagement recesses 44a and 44b formed at specific positions, the orientation of the knob A1 relative to the vehicle body is different depending on whether the fuel supply device is disposed on the right side or on the left side of the vehicle body. Will be different. In order to avoid such a problem, in the fuel supply device 1 according to the embodiment, as shown in FIGS. 7A and 7B, the first engagement protrusions 22a and 22b are formed with respect to the screwing start point 24a. Two types of cap nuts 20 having different positions are prepared. Of course, when the position of the knob A1 is required to be vertical when the fuel cap A is closed, the cap nut 20 having the first engagement protrusions 22a and 22b formed at other appropriate positions is used. prepare. On the other hand, for the filler neck 40, it is sufficient to prepare only one type in which the engagement concave portions 44a and 44b are formed at specific positions with respect to the breather pipe 43.

  Hereinafter, the assembly method of the fuel supply apparatus which concerns on embodiment is demonstrated.

  First, the nozzle guide 30 is inserted into the main body 41 of the filler neck 40 from the fuel introduction part 32 side. The nozzle guide 30 inserted into the main body 41 has two engagement protrusions 35a and 35b engaged with an engagement recess (not shown) formed in the main body 41, and positioning and rotation prevention with respect to the filler neck 40 are performed. Is done. This also makes it possible to rectify the fuel to be supplied and prevent the fuel tank from blowing back.

  Next, the cap nut 20 is attached to the main body 41 of the filler neck 40. At this time, the first engagement protrusions 22a and 22b are formed so that the knob A1 of the fuel cap A faces the direction required by the vehicle manufacturer when the fuel cap A is attached to the fuel supply device 1 installed on the vehicle body. The required cap nut 20 is selected and attached to the filler neck 40. When the cap nut 20 is attached to the main body 41, the two first engaging protrusions 22 a and 22 b formed on the peripheral surface of the cap nut 20 are replaced with the two engaging recesses 44 a and 44 b formed on the end surface of the main body 41. And the two second engaging projections 23a and 23b formed on the end surface of the cap nut 20 are engaged with the two engaging recesses 34a and 34b formed on the end surface of the nozzle guide 30. Do. Thereby, positioning of the cap nut 20 with respect to the filler neck 40 and the nozzle guide 30 is performed. In this case, the first engaging convex portions 22a and 22b, the engaging concave portions 34a and 34b, and the engaging concave portions 44a and 44b are formed in different lateral widths. The fitting recess is securely engaged, and the mounting direction of the cap nut 20 with respect to the nozzle guide 30 and the filler neck 40 is not mistaken. In addition, formation can also be abbreviate | omitted about 2nd engagement convex part 23a, 23b and engagement recessed part 34a, 34b.

  Next, after the O-ring 60 is mounted in the O-ring mounting groove 45 formed in the filler neck 40, the filler pipe 10 is attached to the main body portion 41 of the filler neck 40. The filler pipe 10 is attached to the main body portion 41 of the filler neck 40 by inserting the main body portion 41 of the filler neck 40 into the filler pipe 10 and engaging the engagement step portion 15 formed on the inner peripheral surface of the filler neck connecting portion 12. This is done by engaging a locking claw 45 formed on the filler neck 40. As a result, as shown in FIG. 2, the cap nut 20 is brought into contact with the back surface of the fuel cap mounting surface 14 formed on the filler pipe 10, and the cap nut 20 is fixed. Further, the gap between the outer surface of the filler neck 40 and the inner surface of the filler pipe 10 is sealed by the O-ring 60.

  Next, the cap protector 50 is attached to the main body 41 of the filler neck 40. The cap protector 50 is attached to the filler neck 40 by inserting an anti-rotation protrusion 47 formed on the outer peripheral surface of the main body 41 into an engagement groove 53 formed on the cap protector 50, and attaching the main body to the end surface of the cap protector 50. This is done by contacting the positioning protrusions 48 formed on the outer peripheral surface of 41. The filler neck 40 and the cap protector 50 can also be fixed using screws or the like.

  Finally, O-rings 61 and 62 are mounted in O-ring mounting grooves 42 a and 43 a formed in the filler neck 40, respectively, and then fuel is supplied to the outer periphery of the fuel outlet pipe 42 and the breather pipe 43 formed in the filler neck 40. The pipes 63 and 64 are connected to each other. A gap between the fuel outlet pipe 42 and the fuel pipe 63 is sealed with an O-ring 61, and a gap between the breather pipe 43 and the fuel pipe 64 is sealed with an O-ring 62.

  In the fuel supply device 1 according to the embodiment, the cap nut 20 is formed as a separate body independent of the filler pipe 10, the nozzle guide 30, and the filler neck 40, and therefore the first fuel cap A with respect to the screwing start point 24a. One type of cap nut 20 selected from a plurality of types in which the formation positions of the engaging convex portions 22 a and 22 b are different, and one type of filler in which engaging concave portions 44 a and 44 b are formed at specific positions with respect to the breather pipe 43. By combining with the neck 40, the direction of the knob A1 when the fuel cap A is closed can be appropriately adjusted. Therefore, the fuel supply apparatus excellent in versatility can be implemented at low cost.

  Moreover, since the fuel supply apparatus 1 according to the embodiment has the filler pipe 10 and the cap nut 20 formed as independent separate bodies, the configuration of the filler pipe 10 can be inevitably small and simple, The fuel refueling device 1 can be reduced in weight and cost. That is, when the filler pipe 10 is reduced in size, the amount of metal material used can be reduced, so that the fuel supply device 1 can be reduced in weight. In addition, since the metal material cost can be reduced, the fuel supply apparatus 1 can be reduced in cost. Further, when the configuration of the filler pipe 10 is simplified, the manufacturing of the filler pipe 10 does not require complicated processing machines or advanced skills, so that the manufacturing of the filler pipe 10 can be made more efficient and the production technology is low. Manufacturing with this becomes possible. Therefore, the cost reduction of the fuel supply apparatus 1 can be achieved also from this point. Furthermore, since the design, development and manufacture of the filler pipe 10 can be speeded up, the product can be started up early.

  Furthermore, since the fuel supply apparatus 1 according to the embodiment includes the metal filler pipe 10, the abrasion resistance against the attachment and detachment of the fuel cap and the impact resistance against the collision with the fuel nozzle are the same as those of the conventional product. The durability and reliability of the fuel supply device can be maintained.

  The present invention is characterized in that the cap nut is formed separately from the filler pipe, the nozzle guide, and the filler neck, and other configurations are described in the description of the embodiment. It can change suitably, without.

  For example, in the above-described embodiment, a plurality of types of cap nuts 20 having different formation positions of the first engagement convex portions 22a and 22b with respect to the screwing start point 24a of the fuel cap A are prepared. 8, two sets of engaging recesses 44a, 44b for engaging the two first engaging protrusions 22a, 22b formed on the cap nut 20 on the end surface of the filler neck 40, as shown in FIG. 44a 'and 44b' can also be formed. In this case, as the cap nut 20, it is sufficient to prepare two types of cap nuts 20 in which the first engagement convex portions 22a and 22b are formed at specific positions with respect to the screwing start point 24a of the fuel cap A. . In this case, the first engagement protrusions 22a and 22b formed on the cap nut 20 are engaged with the engagement recesses 44a and 44b formed on the end surface of the filler neck 40, or the engagement recesses 44a ′ and The direction of the knob A1 of the fuel cap A is adjusted by engaging with 44b '.

  Moreover, in the said embodiment, although the nozzle guide 30 was made into resin, it can also be made into metal. Furthermore, in the said embodiment, although the two 1st engaging convex parts 22a and 22b were formed facing, it does not necessarily need to form in the position of facing, and can also form in an asymmetrical position. Similarly, in the above-described embodiment, the two second engaging protrusions 23a and 23b are formed to face each other. However, the second engaging protrusions 23a and 23b are not necessarily formed at the opposite positions, and can be formed at asymmetric positions. In addition, in the above-described embodiment, the filler neck 40 in which the breather pipe 43 is branched from the side wall is used. However, a filler neck that does not have the breather pipe 43 may be used. In the above embodiment, two engaging projections and engaging recesses having different sizes are formed between two members assembled with each other, and positioning between these members is performed. One engaging projection and one engaging recess may be formed between the members.

  INDUSTRIAL APPLICABILITY The present invention can be used for an automobile fuel supply device.

DESCRIPTION OF SYMBOLS 1 Fuel supply apparatus 10 Filler pipe 20 Cap nut 30 Nozzle guide 40 Filler neck 50 Cap protector 60, 61, 62 O-ring 63, 64 Fuel pipe A Fuel cap

Claims (8)

In the fuel supply apparatus, the fuel supply device is disposed inside the vehicle body with the insertion port of the fuel supply nozzle facing the fuel supply port opened in the vehicle body, and a fuel cap is detachably attached to the insertion port of the fuel supply nozzle.
A cap nut for screwing the fuel cap is a filler pipe having an insertion port for the fueling nozzle, a filler neck having one end connected to the filler pipe and a fuel pipe connected to the other end, and the cap nut and the A fuel supply apparatus, wherein the fuel guide is formed as an independent separate body with respect to the nozzle guide disposed between the filler neck and the filler neck.   The fuel oil supply device according to claim 1, wherein the cap nut is a resin molded product or a die-cast molded product.   A screw thread for screwing the fuel cap is formed in the circumferential direction of the inner surface of the cap nut, and the circumferential length of the screw thread is shorter than the length of one round of the inner surface of the cap nut. The fuel supply device according to any one of claims 1 and 2.   An engaging convex portion and an engaging concave portion for preventing rotation are formed between the cap nut and the nozzle guide, between the cap nut and the filler neck, and between the nozzle guide and the filler neck, respectively. The fuel supply device according to any one of claims 1 to 3, wherein   The fuel filler apparatus according to any one of claims 1 to 4, wherein the filler neck is formed of a conductive resin material.   The fuel supply apparatus according to any one of claims 1 to 5, wherein the nozzle guide is formed of a resin material. A filler pipe having an insertion port for a fuel nozzle, a cap nut formed with a female screw for screwing a fuel cap, a filler neck having one end connected to the filler pipe and the other end connected to the fuel pipe; In an assembly method of a fuel supply device, a required fuel supply device is assembled by integrally combining a nozzle guide disposed between the cap nut and the filler neck.
The cap nut is formed separately from the filler pipe, the nozzle guide and the filler neck,
As the filler neck, one type of filler neck in which one or one set of engaging convex portions or engaging concave portions for preventing rotation of the cap nut with respect to the filler neck is prepared, and the cap As the nut, one or one set of engaging convex portions or engaging concave portions that are engaged with one or one set of engaging convex portions or engaging concave portions formed on the filler neck is formed as the female screw. Prepare multiple types of cap nuts formed at different positions with respect to the position,
A fuel refueling device comprising a combination of the one type of filler neck and one type of cap nut selected from the plurality of types of cap nuts to assemble a fuel refueling device having a different arrangement of the female screw with respect to the filler neck. Assembly method.   8. The method of assembling a fuel supply system according to claim 7, wherein the filler neck uses a breather pipe branched from a side wall.