WO2018147031A1 - Mounting structure for fuel system component - Google Patents

Mounting structure for fuel system component Download PDF

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Publication number
WO2018147031A1
WO2018147031A1 PCT/JP2018/001396 JP2018001396W WO2018147031A1 WO 2018147031 A1 WO2018147031 A1 WO 2018147031A1 JP 2018001396 W JP2018001396 W JP 2018001396W WO 2018147031 A1 WO2018147031 A1 WO 2018147031A1
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WO
WIPO (PCT)
Prior art keywords
component mounting
arm
fuel system
fuel
system component
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Application number
PCT/JP2018/001396
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French (fr)
Japanese (ja)
Inventor
池谷　昌紀
崇 蟹江
Original Assignee
愛三工業株式会社
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Filing date
Publication date
Application filed by 愛三工業株式会社 filed Critical 愛三工業株式会社
Publication of WO2018147031A1 publication Critical patent/WO2018147031A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines

Definitions

  • the present invention relates to a mounting structure for fuel system parts.
  • the fuel supply device that supplies the fuel in the fuel tank to the outside of the fuel tank includes a fuel pump, a fuel filter, a pressure regulating valve, a fuel pipe that connects these, and the like.
  • the conventional example disclosed in Japanese Patent Laid-Open No. 2013-174183 includes a pressure regulating valve having a flange on the outer peripheral portion and a fuel pipe having a component mounting portion that receives and supports the pressure regulating valve.
  • the component mounting portion is formed with a locking projection that protrudes radially outward.
  • a U-shaped elastic engagement piece is formed on the cap that covers the pressure regulating valve.
  • the elastic engagement piece of the cap is engaged with the locking projection of the component mounting portion, that is, snap-fit engaged using elastic deformation.
  • the pressure regulator (26), the fitting part (80), the claw part (82), and the fitting part (88) of Japanese Patent Application Laid-Open No. 2013-174183 are the fuel system parts, the part mounting part, and the locking protrusion of this specification, respectively. Corresponds to an elastic engagement piece.
  • the cap since a cap is necessary, the number of parts and assembly man-hours are increased.
  • an elastic engagement piece is formed in the component attachment portion of the fuel pipe, and the elastic engagement piece is snap-fit engaged with the flange of the pressure regulating valve.
  • the elastic engagement piece functions as a retaining portion for the flange of the pressure regulating valve. The load resistance of the retaining portion is determined by the amount of engagement of the elastic engagement piece with the flange.
  • the engagement amount of the elastic engagement piece with respect to the flange needs to have a predetermined size in order to hold the load due to the fuel pressure acting on the pressure regulating valve.
  • This structure is not practical because the amount of elastic deformation of the elastic engagement piece radially outward becomes excessive. Therefore, conventionally, there is a need for an attachment structure in which the amount of elastic deformation of the retaining portion in the radial direction is small while securing the amount of engagement of the retaining portion with the flange of the fuel system component.
  • the fuel system component mounting structure includes a fuel system component having a flange on the outer peripheral portion and a fuel pipe having a component mounting portion for receiving and supporting the fuel system component.
  • the component mounting portion is formed with a retaining portion for retaining the flange by snap-fit engagement.
  • the retaining portion includes a first arm portion, a connection portion, and a second arm portion.
  • the first arm portion extends axially forward from the component mounting portion and is formed so as to be elastically deformable radially outward.
  • the connecting portion is formed at the tip end portion in the axial direction of the first arm portion.
  • the second arm portion extends rearward in the axial direction from the connection portion, and is formed to be elastically deformable radially outward.
  • An engaging portion that engages with the flange of the fuel system component is provided at the tip of the second arm portion.
  • this structure obtains stepwise elastic deformation of elastic deformation of the first arm portion outward in the radial direction and elastic deformation of the second arm portion outward in the radial direction. Therefore, the engaging portion of the second arm portion is snap-fit engaged with the flange of the fuel system component. Thereby, the amount of elastic deformation of the retaining portion in the radial direction can be suppressed while securing the amount of engagement of the retaining portion necessary for the engagement of the fuel system component with the flange.
  • the connecting portion is formed with a guide portion that extends in the axial direction and guides the flange coaxially with respect to the component mounting portion.
  • the first arm part and the second arm part are arranged on the same plane. According to this configuration, even when a load due to the fuel pressure acting on the fuel system component attached to the component attachment portion is applied to both arm portions, the radially outward component force is unlikely to act on both arm portions. Therefore, elastic deformation can be suppressed outward in the radial direction of both arm portions, and detachment of the fuel system component due to the elastic deformation can be suppressed.
  • a stepped recess is formed in the inner peripheral portion of the flange on the retaining side.
  • An engaging projection that can be engaged with the stepped recess is formed on the engaging portion of the second arm portion.
  • the engaging portion of the second arm portion is formed with a guide inclined surface that is inclined radially outward from the tip end side in the axial direction of the component mounting portion toward the rear in the axial direction.
  • the connecting portion is formed with a guide inclined surface that is inclined radially outward from the tip end side in the axial direction of the component mounting portion toward the rear in the axial direction.
  • FIG. 1 is a configuration diagram of a fuel supply device according to Embodiment 1.
  • FIG. It is sectional drawing of a pressure regulating valve. It is a front sectional view of the mounting structure of the pressure regulating valve. It is a sectional side view of the attachment structure of a pressure regulating valve. It is a plane sectional view of the attachment structure of a pressure regulation valve. It is a perspective view of the pressure regulation valve and component attachment part of the state mutually separated. It is a partially broken perspective view of a component attachment part. It is a side view of a pressure regulation valve in assembly process 1, and a sectional view of a component attachment part. It is a side view of a pressure regulation valve in assembly process 2, and a sectional view of a component attachment part.
  • FIG. 1 It is a side view of a pressure regulation valve in assembly process 3, and a sectional view of a component attachment part. It is a side view of a pressure regulation valve in assembly process 4, and a sectional view of a component attachment part.
  • FIG. 1 It is sectional drawing of the metal mold
  • FIG. It is sectional drawing of the metal mold
  • FIG. It is a partially broken perspective view of the component attachment part concerning Embodiment 3.
  • FIG. It is typical sectional drawing which shows the relationship between an inner side arm part and a lower slide type
  • FIG. It is a typical sectional view of an inner side arm part and a lower slide type in die cutting process 2. It is a typical sectional view showing the relation between a connection arm part and a lower slide type. It is a typical sectional view of a connection arm part and a lower slide type in die cutting process 1. It is a typical sectional view of a connection arm part and a lower slide type in die cutting process 2.
  • a fuel system component mounting structure according to the present embodiment can be applied to a pressure regulating valve mounting structure in a fuel supply device used in a vehicle engine such as an automobile.
  • the fuel supply device 10 includes a fuel pump 14 disposed in a fuel tank 12, a pressure adjustment valve (fuel system component) 16, a fuel pipe 18, and the like.
  • the fuel pump 14 is a motor-integrated fuel pump, and supplies fuel in the fuel tank 12 to a so-called engine outside the tank.
  • a fuel filter 20 for filtering fuel is provided at the fuel inlet of the fuel pump 14.
  • a fuel pipe 18 is connected to the fuel suction port of the fuel pump 14.
  • the fuel pipe 18 has a fuel passage 22 and a branch passage 24 branched from the fuel passage 22.
  • a fuel supply passage 26 provided outside the fuel tank 12 is connected to the fuel passage 22.
  • a pressure regulating valve 16 is connected to the branch passage 24.
  • the fuel supply passage 26 is connected to the engine.
  • the pressure adjusting valve 16 is a diaphragm type pressure adjusting valve, and adjusts the pressure of the fuel in the fuel passage 22 so-called fuel pressure to a predetermined pressure.
  • the vertical direction is defined based on FIG. However, the vertical direction does not specify the arrangement direction of the pressure regulating valve 16.
  • the pressure regulating valve 16 includes a hollow cylindrical casing 28.
  • the casing 28 includes a first case half 29 and a second case half 30 that are divided into upper and lower parts. Both case halves 29 and 30 are press-formed products made of metal such as iron.
  • the second case half 30 is formed in a cup shape having an upper surface opened.
  • An annular flange portion 32 projecting outward in the radial direction is formed at the upper end portion of the second case half 30.
  • a vent hole 33 is formed in the side wall (upper wall) of the second case half 30.
  • the first case half 29 is formed in an inverted cup shape having a lower surface opened, specifically, a three-step cylindrical shape.
  • An annular flange portion 35 projecting radially outward is formed at the lower end of the lower cylindrical portion of the first case half 29.
  • a plurality of fuel introduction holes 36 are formed at equal intervals in the circumferential direction.
  • a fuel discharge hole 37 is formed in the upper wall portion (tip wall portion) of the first case half 29.
  • a hollow cylindrical valve seat member 39 is attached to the middle cylinder portion of the first case half 29 by press-fitting.
  • the outer peripheral portion of the annular plate-shaped diaphragm 41 is sandwiched between the flange portion 35 of the first case half 29 and the flange portion 32 of the second case half 30.
  • the upper flange portion 35 is caulked so as to wrap the lower flange portion 32.
  • the case halves 29 and 30 are integrated with the diaphragm 41 therebetween.
  • the diaphragm 41 is made of a rubber-like elastic material and has flexibility.
  • a flange 43 projecting from the outer peripheral portion of the casing 28 is formed by both flange portions 32 and 35.
  • the internal space of the casing 28 is divided into two upper and lower chambers, that is, a pressure regulating chamber 46 and a back pressure chamber 45 by a diaphragm 41.
  • An annular recess 44 is formed on the inner peripheral portion of the lower surface of the flange 43.
  • the valve holding member 49 and the spring receiving member 48 are integrally coupled to the inner peripheral portion of the diaphragm 41 by caulking with the diaphragm 41 interposed therebetween.
  • the pressure regulating chamber 46 is provided with a disc-shaped valve body 51 and a ball 52 positioned below the valve body 51.
  • the ball 52 is swingably supported by the valve holding member 49 via a locking plate 53.
  • a spring 55 (for example, a coil spring) is interposed between the opposing surfaces of the second case half 30 and the spring receiving member 48.
  • the spring 55 urges the valve body 51 in a direction in which the valve body 51 is seated on the valve seat member 39, that is, a valve closing direction (upward in FIG. 2).
  • a spacer ring 57 and an O-ring 58 are mounted on the outer peripheral surface of the lower cylinder portion of the first case half 29.
  • the spacer ring 57 is held between the flange 43 and the O-ring 58.
  • An O-ring 59 is attached to the outer peripheral surface of the upper cylindrical portion of the first case half 29.
  • FIG. 3 a connecting pipe portion 61 that is bent downward is formed at the downstream end portion of the branch passage 24 of the fuel pipe 18.
  • the connecting pipe part 61 is formed in an inner / outer double cylinder shape composed of an inner cylinder part 62 and an outer cylinder part 63.
  • the fuel pipe 18 is made of resin.
  • the downstream portion of the branch passage 24 is formed by the space between the inner cylinder portion 62 and the outer cylinder portion 63.
  • An excess fuel discharge passage 65 is formed in the inner cylinder portion 62.
  • a connection base 64 having a long rectangular outer shape that is slightly longer in the front-rear direction than in the left-right direction is formed in a flange shape at the lower end of the outer cylinder 63 (see FIG. 6).
  • a cylindrical fitting tube portion 66 projects concentrically from the lower end surface of the connection base portion 64.
  • the fitting cylinder part 66 has an inner diameter larger than the inner diameter of the connection base part 64.
  • the fitting cylinder part 66 has an outer diameter slightly smaller than the dimension of the connection base part 64 in the short direction (left-right direction).
  • a component mounting portion 68 including a connection base portion 64 and a fitting tube portion 66 is formed at the lower end portion of the outer tube portion 63 by integral molding.
  • the lower cylinder portion of the first case half 29 of the pressure regulating valve 16 is fitted in the lower end portion of the outer cylinder portion 63 of the fuel pipe 18.
  • the fuel introduction hole 36 is communicated with the branch passage 24.
  • the lower end surface of the fitting cylinder portion 66 is in contact with or close to the upper surface of the flange 43 of the pressure regulating valve 16.
  • the middle cylinder part and the upper cylinder part of the first case half 29 are fitted in the lower part of the inner cylinder part 62.
  • the fuel discharge hole 37 is communicated with the surplus fuel discharge passage 65.
  • An O-ring 58 and a spacer ring 57 are disposed in the fitting cylinder portion 66.
  • the O-ring 58 elastically seals between the first case half 29 and the fitting cylinder portion 66.
  • An O-ring 59 is disposed in the inner cylinder portion 62. The O-ring 59 elastically seals between the first case half 29 and the inner cylinder portion 62.
  • the fuel pump 14 operates to suck and pressurize the fuel in the fuel tank 12 through the fuel filter 20. Thereafter, the fuel pump 14 supplies fuel to the engine via the fuel passage 22 and the fuel supply passage 26. Part of the fuel supplied to the engine is introduced from the fuel passage 22 into the pressure regulating chamber 46 of the pressure regulating valve 16 through the branch passage 24.
  • the pressure adjustment valve 16 adjusts the fuel pressure supplied to the engine to a predetermined pressure. That is, as shown in FIG. 2, when the fuel pressure in the pressure regulating chamber 46 is lower than the elastic force of the spring 55 of the back pressure chamber 45 of the pressure regulating valve 16, the valve body 51 is seated on the valve seat member 39. The valve is closed.
  • the component mounting portion 68 includes hanging piece-like retaining arms (preventing portions) 70 on the left and right sides of the connection base 64.
  • the left and right retaining arms 70 are symmetrical to each other.
  • each retaining arm 70 has a pair of front and rear outer arm portions 72, one connection arm portion 74, one inner arm portion 76, and one guide arm portion 78.
  • the pair of outer arm portions 72 extends downward (in the axial direction of the component mounting portion 68) from both front and rear end portions of the side portion of the connection base portion 64.
  • the outer arm portion 72 has a band plate shape and extends from the rear side (upper) in the axial direction of the component mounting portion 68 to the front side (lower) in the axial direction.
  • the pair of outer arm portions (first arm portions) 72 extend in parallel to each other and are located on the same plane parallel to the axis of the component mounting portion 68.
  • the outer arm portion 72 is formed so as to be elastically deformable, that is, so-called flexibly deformed radially outward with a connection portion with the connection base portion 64 as a fulcrum (see a two-dot chain line 72 in FIG. 3).
  • connection arm portion (connection portion) 74 is constructed between the distal end portions (lower end portions) of the outer arm portions 72.
  • the connection arm portion 74 is formed in a band plate shape extending in the front-rear direction.
  • the connecting arm portion 74 is disposed on the same plane as the outer arm portions 72 (see FIG. 5).
  • the inner arm portion (second arm portion) 76 is formed in a strip shape extending upward from the center portion of the connection arm portion 74.
  • the inner arm portion 76 is disposed in parallel and on the same plane as the outer arm portions 72 (see FIG. 5).
  • the inner arm portion 76 is formed so as to be elastically deformed, that is, so-called flexibly deformed radially outward with a connection portion with the connection arm portion 74 as a fulcrum (see a two-dot chain line 76 in FIG. 3).
  • the retaining arm 70 is formed with an inverted U-shaped opening groove 79 surrounded by the connection base portion 64, both outer arm portions 72, the connection arm portion 74 and the inner arm portion 76.
  • the distal end portion (upper end portion) of the inner arm portion 76 is an engaging portion 80.
  • a fitting groove portion 81 having a circular arc cross section having a slightly larger radius than the outer peripheral surface of the second case half 30 of the pressure regulating valve 16 is formed.
  • the groove bottom surface of the fitting groove portion 81 is connected to the groove bottom surface of a guide groove 84 described later.
  • the front and rear side wall portions of the fitting groove portion 81 protrude inward from the inner side surface of the remaining portion of the inner arm portion 76 (see FIG. 3).
  • the front end surface (upper end surface) of the engaging portion 80 is formed on a plane orthogonal to the axis of the component mounting portion 68.
  • the front end surface of the engaging portion 80 is in contact with or close to the lower surface of the flange 43 of the pressure regulating valve 16 attached to the component attaching portion 68.
  • the front end surface of the engaging portion 80 faces the flange 43 located on the retaining side.
  • the engaging portion 80 is disposed in the projection plane of the flange 43 in plan view (see FIG. 5).
  • the guide arm portion (guide portion) 78 is formed in a band plate shape extending downward from the central portion of the connection arm portion 74.
  • the guide arm portion 78 is formed in an inclined shape that is inclined at a predetermined angle ⁇ (for example, 15 °) radially outward of the component mounting portion 68 from the base end portion (upper end portion) to the distal end portion (lower end portion).
  • ⁇ for example, 15 °
  • the remaining portions of the both retaining arms 70 excluding the guide arm portion 78 are substantially parallel to each other.
  • the portion extends linearly in the axial direction (vertical direction) of the component mounting portion 68.
  • a guide groove 84 extending in the axial direction (vertical direction) of the component mounting portion 68 is formed on the inner side surface of the central portion in the front-rear direction of the retaining arm 70.
  • the groove depth of the guide groove 84 (the dimension in the front and back direction in FIG. 4) is shallow.
  • the groove width (the dimension in the front-rear direction) of the guide groove 84 is gradually decreased from the tip (lower end) of the guide arm portion 78 toward the engaging portion 80 of the inner arm portion 76.
  • the upper end of the guide groove 84 is connected to the fitting groove portion 81 of the engaging portion 80.
  • the pressure regulating valve 16 is disposed between the guide arm portions 78 of the both retaining arms 70.
  • the left and right end portions of the flange 43 of the pressure regulating valve 16 are fitted into the guide grooves 84 of the guide arm portion 78.
  • a spacer ring 57 and O-rings 58 and 59 are attached to the pressure adjustment valve 16 in advance.
  • the pressure regulating valve 16 is further inserted into the component attachment portion 68.
  • the flange 43 is slid upward along the fitting groove 81 beyond the guide groove 84.
  • both inner arm portions 76 are expanded in the opposite direction, that is, radially outward using elastic deformation.
  • the middle cylinder portion and the upper cylinder portion of the first case half 29 of the pressure regulating valve 16 are inserted into the inner cylinder portion 62 of the connection pipe portion 61 together with the O-ring 59.
  • the lower cylinder portion of the first case half 29 is inserted into the fitting cylinder portion 66 together with the O-ring 58.
  • the pressure adjusting valve 16 is attached to the component attaching portion 68 in a state of being positioned in the axial direction (vertical direction in FIG. 3).
  • both inner arm portions 76 are simultaneously elastically deformed radially outward. Thereby, the engaging part 80 is disengaged from the flange 43. In this state, the pressure regulating valve 16 can be pulled out from the component mounting portion 68.
  • the mold 90 includes a lower slide mold 92 and left and right side slide molds 94.
  • a cavity corresponding to the component mounting portion 68 is formed by closing the lower slide die 92 and the both side slide die 94.
  • FIG. 12 shows a state where the cavity is filled with resin and the component mounting portion 68 is molded.
  • the lower slide die 92 is provided so as to be slidable in the axial direction (vertical direction).
  • the lower slide mold 92 moves upward toward the side slide mold 94 and closes the mold.
  • the lower slide die 92 has a molding convex portion 96, and the molding convex portion 96 has a molding surface corresponding to the inner peripheral surface of the component mounting portion 68.
  • the forming convex portion 96 has a tapered undercut portion 98 having an inclined surface 98a.
  • the undercut portion 98 is located between the fitting tube portion 66 and the inner arm portion 76 and forms the upper side portion of the opening groove 79 of the component attachment portion 68.
  • the inclined surface 98a gradually decreases the diameter of the undercut portion 98 from the upper end to the lower side.
  • the double-sided slide mold 94 is provided so as to be slidable in the radial direction (left-right direction), and is closed by movement in the opposite direction.
  • Both side surface slide molds 94 are bilaterally symmetric and have a molding recess 100.
  • the molding recess 100 has molding surfaces corresponding to both half halves of the outer peripheral surface of the component mounting portion 68.
  • An inverted U-shaped opening groove forming portion 101 corresponding to each of the opening grooves 79 of the component mounting portion 68 protrudes from the forming recess 100.
  • An inclined surface 101 a corresponding to the inclined surface 98 a of the undercut portion 98 of the forming convex portion 96 is formed at the tip of the opening groove forming portion 101.
  • Resin (specifically, molten resin) is injected from a resin injection gate (not shown) of the fuel pipe 18 into the cavity of the mold 90 described above. Thereby, the component attachment part 68 is molded together with the fuel pipe 18.
  • the pressure adjusting valve 16 is attached to the retaining arm 70 as described above by elastically deforming the outer arm portion 72 radially outward and the inner arm portion 76 radially outward. This causes a gradual elastic deformation with elastic deformation. Thereby, the engaging portion 80 of the inner arm portion 76 is snap-fit engaged with the flange 43 of the pressure regulating valve 16. As a result, it is possible to suppress the amount of elastic deformation of the retaining arm 70 in the radially outward direction while securing the amount of engagement of the engagement portion 80 necessary for engagement with the flange 43.
  • the mounting structure of the pressure regulating valve 16 eliminates the cap required in the conventional example, so that the number of parts and assembly man-hours can be reduced.
  • the attachment structure of the retaining arm 70 utilizes two-stage elastic deformation by the outer arm portion 72 and the inner arm portion 76. Therefore, this structure allows a large displacement while shortening the dimension in the axial direction of the component mounting portion 68 as compared with the elastic engagement piece by one-stage elastic deformation of the conventional example. For this reason, the retaining arm 70 can be compactly formed in the axial direction of the component mounting portion 68, and the moldability of the lower slide die 92 (see FIG. 13) can be improved.
  • the outer arm 72 and the inner arm 76 of the retaining arm 70 are arranged on the same plane. Therefore, even if a load due to the fuel pressure acting on the pressure adjustment valve 16 attached to the component attachment portion 68 is applied to both arm portions 72 and 76, a component force radially outward acts on both arm portions 72 and 76. Hateful. Therefore, elastic deformation can be suppressed outward in the radial direction of both arm portions 72 and 76, and detachment of the pressure regulating valve 16 due to the elastic deformation can be suppressed.
  • both arm portions 74 and 76 are formed in a strip shape extending in the axial direction of the component mounting portion 68.
  • the upper end surface of the engaging portion 80 of the inner arm portion 76 is orthogonal to the axial direction of the component attaching portion 68.
  • both the arm portions 74 and 76 are easily elastically deformed radially outward.
  • both the arm portions 74 and 76 after assembly are not easily elastically deformed by a load due to the fuel pressure acting on the pressure regulating valve 16, and the holding force against the load is high.
  • the engagement area of the engagement portion 80 of the inner arm portion 76 with respect to the flange 43 of the pressure regulating valve 16 can be increased.
  • the holding force with respect to the load by the fuel pressure which acts on the pressure regulation valve 16 can be increased.
  • the number of retaining arms 70 is set to be an even number, it is possible to facilitate the mold design for resin molding as compared to the case of an odd number.
  • Embodiment 2 has a structure in which the inner arm portion 76 (see FIG. 3) of the retaining arm 70 of Embodiment 1 is changed.
  • the engagement protrusion 103 is formed on the upper end surface of the engagement portion 80 of the inner arm portion 76 (specifically, the upper end surfaces of the front and rear side wall portions of the fitting groove portion 81).
  • the engagement protrusion 103 is configured to be engageable with the stepped recess 44 of the flange 43 of the pressure regulating valve 16.
  • the engaging protrusion 103 engages with the stepped recess 44 of the flange 43 of the pressure regulating valve 16. Thereby, the position shift to the radial direction outward (right side in FIG. 17) of the engaging part 80 of the inner side arm part 76 can be suppressed.
  • Embodiment 3 has a structure in which the retaining arm 70 (see FIG. 7) of Embodiment 1 is changed.
  • the changed structure will be described with reference to FIGS. 18 to 24, and a duplicate description will be omitted.
  • guide protrusions 105 are formed on both sides of the engaging portion 80 of the inner arm portion 76.
  • the guide protrusion 105 has a guide slope 106 that is inclined radially outward from the lower side toward the upper side.
  • the connection arm portion 74 has a pair of front and rear guide inclined surfaces 108 between the outer arm portion 72 and the inner arm portion 76. Each guide slope 108 is inclined radially outward from the lower side to the upper side.
  • the lower slide mold 92 is formed with a molding slope (slope on the mold side) 110.
  • the forming slope 110 corresponds to the guide slope 106 of the guide protrusion 105 of the inner arm portion 76.
  • the lower slide die 92 moves downward relative to the inner arm portion 76 when the component attaching portion 68 is die-molded during resin molding.
  • the molding slope 110 of the lower slide mold 92 slides on the guide slope 106 of the guide projection 105 of the inner arm portion 76.
  • the engaging portion 80 of the inner arm portion 76 is pushed outward in the radial direction.
  • the engaging portion 80 of the inner arm portion 76 can be easily released.
  • the load concerning the engaging part 80 of the inner side arm part 76 at the time of mold release is reduced.
  • the forming slope 110 of the lower slide die 92 exceeds the guide slope 106 of the guide protrusion 105, the inner arm portion 76 is elastically restored to the original position.
  • a molding slope (one side slope) 112 is formed at the lower end portion of the opening groove molding portion 101 of the lower slide die 92.
  • the forming slope 112 corresponds to the guide slope 108 of the connection arm portion 74.
  • connection arm portion 74 is elastically restored by the outer arm portion 72. It abuts on the molded part 97. Then, when the molding slope 112 of the lower slide die 92 exceeds the guide slope 108 of the connection arm portion 74, the inner arm portion 76 is elastically restored to the original position (see FIG. 21).
  • Embodiment 4 has a process in which the assembly process of the pressure regulating valve 16 to the component mounting portion 68 of Embodiment 1 is changed.
  • the changed process will be described with reference to FIGS. 25 and 26, and a duplicate description will be omitted.
  • the pressure adjustment valve 16 is assembled to the component mounting portion 68 using a jig 114.
  • the jig 114 is formed in a pillar shape, and has a U-shaped groove 115 that receives the second case half 30 of the pressure regulating valve 16 at the upper end.
  • the second case half 30 of the pressure regulating valve 16 is received in the U-shaped groove 115 of the jig 114.
  • the upper end surfaces of the left and right side wall portions 116 of the U-shaped groove 115 are brought into contact with the lower end surface of the flange 43 of the pressure regulating valve 16.
  • the pressure adjustment valve 16 is pushed up together with the jig 114 with respect to the component mounting portion 68.
  • the left and right side surfaces of the jig 114 are moved upward while elastically sliding and contacting the connection arm portion 74 and the inner arm portion 76.
  • the jig 114 is extracted downward.
  • the outer arm portion 72 is elastically restored, and the engaging portions 80 of the inner arm portions 76 are snap-fit engaged with the flange 43, and the pressure adjusting valve 16 is prevented from coming off at the component attaching portion 68.
  • Embodiment 5 has a configuration in which the retaining arm 70 (see FIG. 5) of Embodiment 1 is changed.
  • the changed configuration will be described with reference to FIG. 27, and redundant description will be omitted.
  • the component mounting portion 68 has three retaining arms 70 at equal intervals in the circumferential direction. In this way, by increasing the number of retaining arms 70 to three, it is possible to further prevent the pressure regulating valve 16 from coming off.
  • Embodiment 6 has a configuration in which the retaining arm 70 (see FIG. 5) of Embodiment 1 is changed.
  • the changed configuration will be described with reference to FIG. 28, and redundant description will be omitted.
  • the component mounting portion 68 has four retaining arms 70 at equal intervals in the circumferential direction.
  • the number of retaining arms 70 is an even number, the mold design for resin molding can be facilitated.
  • the present invention is not limited to the above-described embodiments, and modifications can be made without departing from the present invention.
  • the present invention is not limited to the pressure regulating valve 16 and may be applied to other fuel system parts, for example, a mounting structure such as a fuel pressure sensor for detecting the fuel pressure in the fuel pipe 18.
  • the pressure regulating valve 16 may be a pressure regulating valve 16 such as a bellows type or a relief valve type in addition to the diaphragm 41 type.
  • the number of retaining arms 70 may be any other number.
  • the guide arm portion 78 may be omitted.
  • the guide slope 106 may be formed on the engaging portion 80 itself, and the guide protrusion 105 may be omitted.
  • the guide slope 108 may be formed with a guide projection having the guide slope 108 on the connection arm 74 instead of the connection arm 74 itself.

Abstract

This mounting structure for a fuel system component comprises: a pressure regulation valve (16) having a flange (43); and fuel piping (18) having a component mounting section (68). The component mounting section (68) has formed thereon a retention arm (70) for retaining the flange (43) by snap-fit engagement. The retention arm (70) has an outer arm section (72), a connection arm section (74), and an inner arm section (76). The outer arm section (72) is extended axially forward from the component mounting section (68) and is formed to be elastically deformable. The connection arm section (74) is formed at the axial front end of the outer arm section (72). The inner arm section (76) is extended axially rearward from the connection arm section (74), has at the front end thereof an engagement section (80) engaging with the flange (43), and is formed to be elastically deformable.

Description

燃料系部品の取り付け構造Mounting structure for fuel system parts
　本発明は、燃料系部品の取り付け構造に関する。 The present invention relates to a mounting structure for fuel system parts.
　燃料タンク内の燃料を燃料タンク外に供給する燃料供給装置は、燃料ポンプ、燃料フィルタ、圧力調整弁、これらを接続する燃料配管等により構成されている。特開２０１３－１７４１８３号公報に開示の従来例は、外周部にフランジを有する圧力調整弁と、圧力調整弁を受け入れて支持する部品取り付け部を有する燃料配管とを備えている。部品取り付け部には、径方向外方に突出する係止突起が形成されている。圧力調整弁を覆うキャップには、Ｕ字状の弾性係合片が形成されている。燃料配管の部品取り付け部に圧力調整弁が嵌合された状態で、部品取り付け部の係止突起にキャップの弾性係合片が弾性変形を利用して係合すなわちスナップフィット係合される。これにより燃料配管に圧力調整弁が抜け止めされている。特開２０１３－１７４１８３号公報のプレッシャレギュレータ（２６）、嵌合部（８０）、爪部（８２）、嵌合部（８８）がそれぞれ本明細書の燃料系部品、部品取り付け部、係止突起、弾性係合片に相当する。 The fuel supply device that supplies the fuel in the fuel tank to the outside of the fuel tank includes a fuel pump, a fuel filter, a pressure regulating valve, a fuel pipe that connects these, and the like. The conventional example disclosed in Japanese Patent Laid-Open No. 2013-174183 includes a pressure regulating valve having a flange on the outer peripheral portion and a fuel pipe having a component mounting portion that receives and supports the pressure regulating valve. The component mounting portion is formed with a locking projection that protrudes radially outward. A U-shaped elastic engagement piece is formed on the cap that covers the pressure regulating valve. In a state where the pressure adjusting valve is fitted to the component mounting portion of the fuel pipe, the elastic engagement piece of the cap is engaged with the locking projection of the component mounting portion, that is, snap-fit engaged using elastic deformation. As a result, the pressure regulating valve is prevented from coming off from the fuel pipe. The pressure regulator (26), the fitting part (80), the claw part (82), and the fitting part (88) of Japanese Patent Application Laid-Open No. 2013-174183 are the fuel system parts, the part mounting part, and the locking protrusion of this specification, respectively. Corresponds to an elastic engagement piece.
　従来例によると、キャップが必要であることから、部品点数及び組み付け工数の増加を招いている。キャップを省略する構成として、燃料配管の部品取り付け部に弾性係合片を形成し、その弾性係合片を圧力調整弁のフランジにスナップフィット係合させることが考えられる。しかし、部品取り付け部に取り付けられた圧力調整弁に燃料配管内の高い燃圧（燃料圧力）が作用した場合、圧力調整弁が抜け方向へ押圧される。弾性係合片は、圧力調整弁のフランジに対する抜け止め部として機能する。抜け止め部の耐荷重は、弾性係合片のフランジに対する係合量によって決定される。そのため弾性係合片のフランジに対する係合量は、圧力調整弁に作用する燃圧による荷重を保持するために所定の大きさが必要である。この構造は、弾性係合片の径方向外方への弾性変形量が過大になってしまうため、実用的ではない。したがって従来、燃料系部品のフランジに対する抜け止め部の係合量を確保しつつ、抜け止め部の径方向外方への弾性変形量の小さい、取り付け構造が必要とされている。 According to the conventional example, since a cap is necessary, the number of parts and assembly man-hours are increased. As a configuration in which the cap is omitted, it is conceivable that an elastic engagement piece is formed in the component attachment portion of the fuel pipe, and the elastic engagement piece is snap-fit engaged with the flange of the pressure regulating valve. However, when a high fuel pressure (fuel pressure) in the fuel pipe is applied to the pressure adjustment valve attached to the component attachment portion, the pressure adjustment valve is pressed in the removal direction. The elastic engagement piece functions as a retaining portion for the flange of the pressure regulating valve. The load resistance of the retaining portion is determined by the amount of engagement of the elastic engagement piece with the flange. Therefore, the engagement amount of the elastic engagement piece with respect to the flange needs to have a predetermined size in order to hold the load due to the fuel pressure acting on the pressure regulating valve. This structure is not practical because the amount of elastic deformation of the elastic engagement piece radially outward becomes excessive. Therefore, conventionally, there is a need for an attachment structure in which the amount of elastic deformation of the retaining portion in the radial direction is small while securing the amount of engagement of the retaining portion with the flange of the fuel system component.
　本発明の１つの特徴によると、燃料系部品の取り付け構造は、外周部にフランジを有する燃料系部品と、燃料系部品を受け入れて支持する部品取り付け部を有する燃料配管を備えている。部品取り付け部には、フランジをスナップフィット係合により抜け止めする抜け止め部が形成されている。抜け止め部は、第１アーム部と接続部と第２アーム部とを有している。第１アーム部は、部品取り付け部から軸方向先方に延在されかつ径方向外方へ弾性変形可能に形成されている。接続部は、第１アーム部の軸方向先端部に形成されている。第２アーム部は、接続部から軸方向後方に延在され、径方向外方へ弾性変形可能に形成されている。第２アーム部の先端部に燃料系部品のフランジに係合する係合部が設けられている。 According to one aspect of the present invention, the fuel system component mounting structure includes a fuel system component having a flange on the outer peripheral portion and a fuel pipe having a component mounting portion for receiving and supporting the fuel system component. The component mounting portion is formed with a retaining portion for retaining the flange by snap-fit engagement. The retaining portion includes a first arm portion, a connection portion, and a second arm portion. The first arm portion extends axially forward from the component mounting portion and is formed so as to be elastically deformable radially outward. The connecting portion is formed at the tip end portion in the axial direction of the first arm portion. The second arm portion extends rearward in the axial direction from the connection portion, and is formed to be elastically deformable radially outward. An engaging portion that engages with the flange of the fuel system component is provided at the tip of the second arm portion.
　したがってこの構造は、第１アーム部の径方向外方への弾性変形と、第２アーム部の径方向外方への弾性変形との段階的な弾性変形を得る。そのため第２アーム部の係合部が燃料系部品のフランジにスナップフィット係合される。これにより、燃料系部品のフランジに対する係合に必要な抜け止め部の係合部の係合量を確保しつつ、抜け止め部の径方向外方への弾性変形量を抑制することができる。 Therefore, this structure obtains stepwise elastic deformation of elastic deformation of the first arm portion outward in the radial direction and elastic deformation of the second arm portion outward in the radial direction. Therefore, the engaging portion of the second arm portion is snap-fit engaged with the flange of the fuel system component. Thereby, the amount of elastic deformation of the retaining portion in the radial direction can be suppressed while securing the amount of engagement of the retaining portion necessary for the engagement of the fuel system component with the flange.
　本発明の他の特徴によると、接続部には、軸方向先方へ延在されかつ部品取り付け部に対してフランジを同軸状にガイドするガイド部が形成されている。この構成によると、部品取り付け部に燃料系部品を取り付ける際、ガイド部によって燃料系部品のフランジが部品取り付け部に対して同軸状にガイドされる。このため、燃料系部品を部品取り付け部にスムーズに取り付けることができる。 According to another feature of the present invention, the connecting portion is formed with a guide portion that extends in the axial direction and guides the flange coaxially with respect to the component mounting portion. According to this configuration, when the fuel system component is attached to the component mounting portion, the flange of the fuel system component is guided coaxially with respect to the component mounting portion by the guide portion. For this reason, a fuel system component can be smoothly attached to a component attachment part.
　本発明の他の特徴によると、第１アーム部と第２アーム部とは、同一平面上に配置されている。この構成によると、部品取り付け部に取り付けられた燃料系部品に作用する燃圧による荷重が両アーム部に加わっても、両アーム部に径方向外方への分力が作用しにくい。したがって、両アーム部の径方向外方へ弾性変形を抑制し、その弾性変形による燃料系部品の抜け外れを抑制することができる。 According to another characteristic of the invention, the first arm part and the second arm part are arranged on the same plane. According to this configuration, even when a load due to the fuel pressure acting on the fuel system component attached to the component attachment portion is applied to both arm portions, the radially outward component force is unlikely to act on both arm portions. Therefore, elastic deformation can be suppressed outward in the radial direction of both arm portions, and detachment of the fuel system component due to the elastic deformation can be suppressed.
　本発明の他の特徴によると、フランジの抜け止め側の内周部には、段付き凹部が形成されている。第２アーム部の係合部には、段付き凹部に係合可能な係合突起が形成されている。この構成によると、燃料系部品のフランジの段付き凹部に対して第２アーム部の係合突起が係合する。これによって、第２アーム部の係合部の径方向外方への位置ずれを抑制することができる。 According to another feature of the present invention, a stepped recess is formed in the inner peripheral portion of the flange on the retaining side. An engaging projection that can be engaged with the stepped recess is formed on the engaging portion of the second arm portion. According to this configuration, the engagement protrusion of the second arm portion engages with the stepped recess of the flange of the fuel system component. Thereby, it is possible to suppress the displacement of the engaging portion of the second arm portion outward in the radial direction.
　本発明の他の特徴によると、第２アーム部の係合部には、部品取り付け部の軸方向先端側から軸方向後方に向かって径方向外方に傾くガイド斜面が形成されている。この構成によると、部品取り付け部の樹脂成形時の型抜きに際し、第２アーム部の係合部のガイド斜面に対して型側の斜面が摺動しつつ第２アーム部の係合部が径方向外方へ押しやられる。これにより、第２アーム部の係合部を容易に離型させることができる。このため、離型時に第２アーム部の係合部にかかる負荷を軽減できる。その結果、その負荷により第２アーム部の係合部に発生する欠損を抑制することができる。 According to another feature of the present invention, the engaging portion of the second arm portion is formed with a guide inclined surface that is inclined radially outward from the tip end side in the axial direction of the component mounting portion toward the rear in the axial direction. According to this configuration, when the mold is removed during resin molding of the component attachment portion, the engaging portion of the second arm portion has a diameter while the inclined surface on the die side slides with respect to the guide inclined surface of the engaging portion of the second arm portion. Pushed out of the direction. Thereby, the engaging part of a 2nd arm part can be released easily. For this reason, the load concerning the engaging part of a 2nd arm part at the time of mold release can be reduced. As a result, it is possible to suppress a defect generated in the engaging portion of the second arm portion due to the load.
　本発明の他の特徴によると、接続部には、部品取り付け部の軸方向先端側から軸方向後方に向かって径方向外方に傾くガイド斜面が形成されている。この構成によると、部品取り付け部の樹脂成形時の型抜きに際し、接続部のガイド斜面に対して型側の斜面が摺動しつつ接続部が径方向外方へ押しやられる。これにより、接続部と共に第１アーム部及び第２アーム部が径方向外方へ押しやられるため、両アーム部を容易に離型させることができる。このため、離型時に両アーム部にかかる負荷を軽減できる。その結果、その負荷により第２アーム部の係合部に発生する欠損を抑制することができる。 According to another feature of the present invention, the connecting portion is formed with a guide inclined surface that is inclined radially outward from the tip end side in the axial direction of the component mounting portion toward the rear in the axial direction. According to this configuration, when the part mounting part is molded during resin molding, the connecting part is pushed radially outward while the mold-side inclined surface slides with respect to the guide inclined surface of the connecting part. Thereby, since the 1st arm part and the 2nd arm part are pushed to a diameter direction outside with a connection part, both arm parts can be released easily. For this reason, the load concerning both arm parts at the time of mold release can be reduced. As a result, it is possible to suppress a defect generated in the engaging portion of the second arm portion due to the load.
実施形態１にかかる燃料供給装置の構成図である。1 is a configuration diagram of a fuel supply device according to Embodiment 1. FIG. 圧力調整弁の断面図である。It is sectional drawing of a pressure regulating valve. 圧力調整弁の取り付け構造の正断面図である。It is a front sectional view of the mounting structure of the pressure regulating valve. 圧力調整弁の取り付け構造の側断面図である。It is a sectional side view of the attachment structure of a pressure regulating valve. 圧力調整弁の取り付け構造の平断面図である。It is a plane sectional view of the attachment structure of a pressure regulation valve. 相互に離された状態の圧力調整弁と部品取り付け部の斜視図である。It is a perspective view of the pressure regulation valve and component attachment part of the state mutually separated. 部品取り付け部の一部破断斜視図である。It is a partially broken perspective view of a component attachment part. 組み付け工程１における圧力調整弁の側面図と部品取り付け部の断面図である。It is a side view of a pressure regulation valve in assembly process 1, and a sectional view of a component attachment part. 組み付け工程２における圧力調整弁の側面図と部品取り付け部の断面図である。It is a side view of a pressure regulation valve in assembly process 2, and a sectional view of a component attachment part. 組み付け工程３における圧力調整弁の側面図と部品取り付け部の断面図である。It is a side view of a pressure regulation valve in assembly process 3, and a sectional view of a component attachment part. 組み付け工程４における圧力調整弁の側面図と部品取り付け部の断面図である。It is a side view of a pressure regulation valve in assembly process 4, and a sectional view of a component attachment part. 部品取り付け部にかかる金型の断面図である。It is sectional drawing of the metal mold | die concerning a component attachment part. 型抜き工程１における金型の断面図である。It is sectional drawing of the metal mold | die in the die cutting process 1. FIG. 型抜き工程２における金型の断面図である。It is sectional drawing of the metal mold | die in the die cutting process 2. FIG. 型抜き工程３における金型の断面図である。It is sectional drawing of the metal mold | die in the die cutting process 3. FIG. 型抜き工程４における金型の断面図である。It is sectional drawing of the metal mold | die in the die cutting process 4. FIG. 実施形態２にかかる圧力調整弁のフランジと内側アーム部の係合部との関係を示す断面図である。It is sectional drawing which shows the relationship between the flange of the pressure control valve concerning Embodiment 2, and the engaging part of an inner side arm part. 実施形態３にかかる部品取り付け部の一部破断斜視図である。It is a partially broken perspective view of the component attachment part concerning Embodiment 3. FIG. 内側アーム部と下側スライド型との関係を示す模式的断面図である。It is typical sectional drawing which shows the relationship between an inner side arm part and a lower slide type | mold. 型抜き工程１における内側アーム部と下側スライド型の模式的断面図である。It is typical sectional drawing of the inner side arm part and lower slide type | mold in the die cutting process 1. FIG. 型抜き工程２における内側アーム部と下側スライド型の模式的断面図である。It is a typical sectional view of an inner side arm part and a lower slide type in die cutting process 2. 接続アーム部と下側スライド型との関係を示す模式的断面図である。It is a typical sectional view showing the relation between a connection arm part and a lower slide type. 型抜き工程１における接続アーム部と下側スライド型の模式的断面図である。It is a typical sectional view of a connection arm part and a lower slide type in die cutting process 1. 型抜き工程２における接続アーム部と下側スライド型の模式的断面図である。It is a typical sectional view of a connection arm part and a lower slide type in die cutting process 2. 組み付け工程１における実施形態４にかかる圧力調整弁の側面図と部品取り付け部の断面図である。It is the side view of the pressure regulation valve concerning Embodiment 4 in the assembly | attachment process 1, and sectional drawing of a component attachment part. 組み付け工程２における実施形態４にかかる圧力調整弁の側面図と部品取り付け部の断面図である。It is the side view of the pressure control valve concerning Embodiment 4 in the assembly | attachment process 2, and sectional drawing of a component attachment part. 実施形態５にかかる圧力調整弁の取り付け構造の平断面図である。It is a plane sectional view of the attachment structure of the pressure regulation valve concerning Embodiment 5. 実施形態６にかかる圧力調整弁の取り付け構造の平断面図である。It is a plane sectional view of the attachment structure of the pressure regulation valve concerning Embodiment 6.
　本発明の１つの実施の形態を図面を用いて説明する。 One embodiment of the present invention will be described with reference to the drawings.
　［実施形態１］本実施形態に係る燃料系部品の取り付け構造は、自動車等の車両用エンジンに用いられる燃料供給装置における圧力調整弁の取り付け構造などに適用できる。図１に示すように、燃料供給装置１０は、燃料タンク１２内に配置された燃料ポンプ１４、圧力調整弁（燃料系部品）１６、及び、燃料配管１８等を備えている。 [Embodiment 1] A fuel system component mounting structure according to the present embodiment can be applied to a pressure regulating valve mounting structure in a fuel supply device used in a vehicle engine such as an automobile. As shown in FIG. 1, the fuel supply device 10 includes a fuel pump 14 disposed in a fuel tank 12, a pressure adjustment valve (fuel system component) 16, a fuel pipe 18, and the like.
　図１に示すように、燃料ポンプ１４は、モータ一体型の燃料ポンプであり、燃料タンク１２内の燃料をタンク外いわゆるエンジンへ供給する。燃料ポンプ１４の燃料吸入口には、燃料を濾過する燃料フィルタ２０が設けられている。燃料ポンプ１４の燃料吸出口には、燃料配管１８が接続されている。燃料配管１８は、燃料通路２２と、その燃料通路２２から分岐した分岐通路２４を有している。燃料通路２２には、燃料タンク１２外に設けられた燃料供給通路２６が接続されている。分岐通路２４には、圧力調整弁１６が接続されている。燃料供給通路２６は、エンジンに接続されている。 As shown in FIG. 1, the fuel pump 14 is a motor-integrated fuel pump, and supplies fuel in the fuel tank 12 to a so-called engine outside the tank. A fuel filter 20 for filtering fuel is provided at the fuel inlet of the fuel pump 14. A fuel pipe 18 is connected to the fuel suction port of the fuel pump 14. The fuel pipe 18 has a fuel passage 22 and a branch passage 24 branched from the fuel passage 22. A fuel supply passage 26 provided outside the fuel tank 12 is connected to the fuel passage 22. A pressure regulating valve 16 is connected to the branch passage 24. The fuel supply passage 26 is connected to the engine.
　圧力調整弁１６は、ダイヤフラム式の圧力調整弁で、燃料通路２２の燃料の圧力いわゆる燃圧を所定の圧力に調整する。以下の説明は、都合上、図２を基に上下方向を定めて説明する。しかし上下方向は、圧力調整弁１６の配置方向を特定するものではない。図２に示すように、圧力調整弁１６は、中空円筒状のケーシング２８を備えている。ケーシング２８は、上下に分割された第１ケース半体２９と第２ケース半体３０とにより構成されている。両ケース半体２９，３０は、鉄等の金属製のプレス成形品である。 The pressure adjusting valve 16 is a diaphragm type pressure adjusting valve, and adjusts the pressure of the fuel in the fuel passage 22 so-called fuel pressure to a predetermined pressure. In the following description, for convenience, the vertical direction is defined based on FIG. However, the vertical direction does not specify the arrangement direction of the pressure regulating valve 16. As shown in FIG. 2, the pressure regulating valve 16 includes a hollow cylindrical casing 28. The casing 28 includes a first case half 29 and a second case half 30 that are divided into upper and lower parts. Both case halves 29 and 30 are press-formed products made of metal such as iron.
　図２に示すように、第２ケース半体３０は、上面を開口するカップ状に形成されている。第２ケース半体３０の上端部には、径方向外方へ張り出す環状のフランジ部３２が形成されている。第２ケース半体３０の側壁部（上壁部）には、通気孔３３が形成されている。 As shown in FIG. 2, the second case half 30 is formed in a cup shape having an upper surface opened. An annular flange portion 32 projecting outward in the radial direction is formed at the upper end portion of the second case half 30. A vent hole 33 is formed in the side wall (upper wall) of the second case half 30.
　図２に示すように、第１ケース半体２９は、下面を開口する逆カップ状、詳しくは３段の段付き円筒状に形成されている。第１ケース半体２９の下段筒部の下端部には、径方向外方へ張り出す環状のフランジ部３５が形成されている。第１ケース半体２９の下段の段付き部には、燃料導入孔３６が周方向に等間隔で複数形成されている。第１ケース半体２９の上壁部（先端壁部）には、燃料排出孔３７が形成されている。第１ケース半体２９の中段筒部には、中空円筒状の弁座部材３９が圧入により取り付けられている。 As shown in FIG. 2, the first case half 29 is formed in an inverted cup shape having a lower surface opened, specifically, a three-step cylindrical shape. An annular flange portion 35 projecting radially outward is formed at the lower end of the lower cylindrical portion of the first case half 29. In the lower stepped portion of the first case half 29, a plurality of fuel introduction holes 36 are formed at equal intervals in the circumferential direction. A fuel discharge hole 37 is formed in the upper wall portion (tip wall portion) of the first case half 29. A hollow cylindrical valve seat member 39 is attached to the middle cylinder portion of the first case half 29 by press-fitting.
　図２に示すように、第１ケース半体２９のフランジ部３５と第２ケース半体３０のフランジ部３２との間に円環板状のダイヤフラム４１の外周部を挟持される。この状態で、上側のフランジ部３５が下側のフランジ部３２を包むようにかしめ付けられている。これにより、両ケース半体２９，３０がダイヤフラム４１を間にして一体化されている。ダイヤフラム４１は、ゴム状弾性材により形成されており、可撓性を有している。両フランジ部３２，３５により、ケーシング２８の外周部に張り出すフランジ４３が形成されている。ケーシング２８の内部空間は、ダイヤフラム４１によって上下２室すなわち調圧室４６と背圧室４５とに区画されている。フランジ４３の下面の内周部には、環状の凹部４４が形成されている。 As shown in FIG. 2, the outer peripheral portion of the annular plate-shaped diaphragm 41 is sandwiched between the flange portion 35 of the first case half 29 and the flange portion 32 of the second case half 30. In this state, the upper flange portion 35 is caulked so as to wrap the lower flange portion 32. As a result, the case halves 29 and 30 are integrated with the diaphragm 41 therebetween. The diaphragm 41 is made of a rubber-like elastic material and has flexibility. A flange 43 projecting from the outer peripheral portion of the casing 28 is formed by both flange portions 32 and 35. The internal space of the casing 28 is divided into two upper and lower chambers, that is, a pressure regulating chamber 46 and a back pressure chamber 45 by a diaphragm 41. An annular recess 44 is formed on the inner peripheral portion of the lower surface of the flange 43.
　図２に示すように、ダイヤフラム４１の内周部には、ダイヤフラム４１を間にして弁保持部材４９とスプリング受け部材４８とがかしめにより一体的に結合されている。調圧室４６には、円板状の弁体５１と、弁体５１の下方に位置するボール５２が設けられる。ボール５２は、係止板５３を介して弁保持部材４９に揺動可能に支持されている。背圧室４５において、第２ケース半体３０とスプリング受け部材４８との対向面間には、スプリング５５（例えばコイルスプリング）が介在されている。スプリング５５は、弁体５１を弁座部材３９に着座する方向いわゆる閉弁方向（図２において上方）に付勢している。 As shown in FIG. 2, the valve holding member 49 and the spring receiving member 48 are integrally coupled to the inner peripheral portion of the diaphragm 41 by caulking with the diaphragm 41 interposed therebetween. The pressure regulating chamber 46 is provided with a disc-shaped valve body 51 and a ball 52 positioned below the valve body 51. The ball 52 is swingably supported by the valve holding member 49 via a locking plate 53. In the back pressure chamber 45, a spring 55 (for example, a coil spring) is interposed between the opposing surfaces of the second case half 30 and the spring receiving member 48. The spring 55 urges the valve body 51 in a direction in which the valve body 51 is seated on the valve seat member 39, that is, a valve closing direction (upward in FIG. 2).
　図２に示すように、第１ケース半体２９の下段筒部の外周面には、スペーサリング５７とＯリング５８が装着されている。スペーサリング５７は、フランジ４３とＯリング５８との間に保持されている。第１ケース半体２９の上段筒部の外周面には、Ｏリング５９が装着されている。 As shown in FIG. 2, a spacer ring 57 and an O-ring 58 are mounted on the outer peripheral surface of the lower cylinder portion of the first case half 29. The spacer ring 57 is held between the flange 43 and the O-ring 58. An O-ring 59 is attached to the outer peripheral surface of the upper cylindrical portion of the first case half 29.
　次に、圧力調整弁１６の取り付け構造を図３～５を参照して説明する。説明の都合上、図３を基に上下左右方向を定めるが、上下方向は圧力調整弁１６の取り付け構造の配置方向を特定するものではない。図３に示すように、燃料配管１８の分岐通路２４の下流側端部には、下方へ折れ曲がる接続管部６１が形成されている。接続管部６１は、内筒部６２と外筒部６３とからなる内外二重筒状に形成されている。燃料配管１８は樹脂製である。 Next, the mounting structure of the pressure regulating valve 16 will be described with reference to FIGS. For convenience of explanation, the vertical and horizontal directions are defined based on FIG. 3, but the vertical direction does not specify the arrangement direction of the mounting structure of the pressure regulating valve 16. As shown in FIG. 3, a connecting pipe portion 61 that is bent downward is formed at the downstream end portion of the branch passage 24 of the fuel pipe 18. The connecting pipe part 61 is formed in an inner / outer double cylinder shape composed of an inner cylinder part 62 and an outer cylinder part 63. The fuel pipe 18 is made of resin.
　図３に示すように、内筒部６２と外筒部６３との間の空間部により分岐通路２４の下流部分が形成されている。内筒部６２内に余剰燃料排出通路６５が形成されている。外筒部６３の下端部には、左右方向よりも前後方向を少し長くする長四角形状の外形を有する接続基部６４がフランジ状に形成されている（図６参照）。接続基部６４の下端面には、円筒状の嵌合筒部６６が同心状に突出されている。嵌合筒部６６は、接続基部６４の内径よりも大きい内径を有している。嵌合筒部６６は、接続基部６４の短手方向（左右方向）の寸法よりも僅かに小さい外径を有している。外筒部６３の下端部には、接続基部６４及び嵌合筒部６６を含む部品取り付け部６８が一体成形により形成されている。 As shown in FIG. 3, the downstream portion of the branch passage 24 is formed by the space between the inner cylinder portion 62 and the outer cylinder portion 63. An excess fuel discharge passage 65 is formed in the inner cylinder portion 62. A connection base 64 having a long rectangular outer shape that is slightly longer in the front-rear direction than in the left-right direction is formed in a flange shape at the lower end of the outer cylinder 63 (see FIG. 6). A cylindrical fitting tube portion 66 projects concentrically from the lower end surface of the connection base portion 64. The fitting cylinder part 66 has an inner diameter larger than the inner diameter of the connection base part 64. The fitting cylinder part 66 has an outer diameter slightly smaller than the dimension of the connection base part 64 in the short direction (left-right direction). A component mounting portion 68 including a connection base portion 64 and a fitting tube portion 66 is formed at the lower end portion of the outer tube portion 63 by integral molding.
　図３に示すように、圧力調整弁１６の第１ケース半体２９の下段筒部は、燃料配管１８の外筒部６３の下端部内に嵌合されている。これにより、燃料導入孔３６が分岐通路２４と連通されている。嵌合筒部６６の下端面は、圧力調整弁１６のフランジ４３の上面に当接又は近接している。第１ケース半体２９の中段筒部及び上段筒部は、内筒部６２の下部内に嵌合されている。これにより、燃料排出孔３７が余剰燃料排出通路６５と連通されている。嵌合筒部６６内に、Ｏリング５８及びスペーサリング５７が配置されている。Ｏリング５８は、第１ケース半体２９と嵌合筒部６６との間を弾性的にシールしている。内筒部６２内に、Ｏリング５９が配置されている。Ｏリング５９は、第１ケース半体２９と内筒部６２との間を弾性的にシールしている。 3, the lower cylinder portion of the first case half 29 of the pressure regulating valve 16 is fitted in the lower end portion of the outer cylinder portion 63 of the fuel pipe 18. Thereby, the fuel introduction hole 36 is communicated with the branch passage 24. The lower end surface of the fitting cylinder portion 66 is in contact with or close to the upper surface of the flange 43 of the pressure regulating valve 16. The middle cylinder part and the upper cylinder part of the first case half 29 are fitted in the lower part of the inner cylinder part 62. Thereby, the fuel discharge hole 37 is communicated with the surplus fuel discharge passage 65. An O-ring 58 and a spacer ring 57 are disposed in the fitting cylinder portion 66. The O-ring 58 elastically seals between the first case half 29 and the fitting cylinder portion 66. An O-ring 59 is disposed in the inner cylinder portion 62. The O-ring 59 elastically seals between the first case half 29 and the inner cylinder portion 62.
　図１に示すように、燃料ポンプ１４は、作動することにより、燃料タンク１２内の燃料を燃料フィルタ２０を介して吸入し加圧する。その後、燃料ポンプ１４は、燃料を燃料通路２２及び燃料供給通路２６を介してエンジンへ供給する。エンジンに供給される燃料の一部は、燃料通路２２から分岐通路２４を介して圧力調整弁１６の調圧室４６に導入される。圧力調整弁１６は、エンジンに供給される燃圧を所定の圧力に調整する。すなわち、図２を参照するように圧力調整弁１６の背圧室４５のスプリング５５の弾性力に比べて、調圧室４６の燃圧が低いときは、弁体５１が弁座部材３９に着座する閉弁状態となる。一方、調圧室４６内の燃圧がスプリング５５の弾性力よりも高くなるときは、スプリング５５の弾性力に抗して弁体５１が弁座部材３９から離座する開弁状態となる。これにより、調圧室４６内の燃料のうちの余剰燃料が燃料排出孔３７から余剰燃料排出通路６５を介して排出される。このようにして、燃料通路２２の燃圧が所定の圧力に調整される。 As shown in FIG. 1, the fuel pump 14 operates to suck and pressurize the fuel in the fuel tank 12 through the fuel filter 20. Thereafter, the fuel pump 14 supplies fuel to the engine via the fuel passage 22 and the fuel supply passage 26. Part of the fuel supplied to the engine is introduced from the fuel passage 22 into the pressure regulating chamber 46 of the pressure regulating valve 16 through the branch passage 24. The pressure adjustment valve 16 adjusts the fuel pressure supplied to the engine to a predetermined pressure. That is, as shown in FIG. 2, when the fuel pressure in the pressure regulating chamber 46 is lower than the elastic force of the spring 55 of the back pressure chamber 45 of the pressure regulating valve 16, the valve body 51 is seated on the valve seat member 39. The valve is closed. On the other hand, when the fuel pressure in the pressure regulating chamber 46 becomes higher than the elastic force of the spring 55, the valve body 51 is in an open state in which the valve body 51 is separated from the valve seat member 39 against the elastic force of the spring 55. As a result, surplus fuel in the fuel in the pressure regulating chamber 46 is discharged from the fuel discharge hole 37 through the surplus fuel discharge passage 65. In this way, the fuel pressure in the fuel passage 22 is adjusted to a predetermined pressure.
　図５，６に示すように、部品取り付け部６８は、接続基部６４の左右両側部に垂下片状の抜け止めアーム（抜け止め部）７０を備えている。左右の抜け止めアーム７０は、相互に左右対称状である。 As shown in FIGS. 5 and 6, the component mounting portion 68 includes hanging piece-like retaining arms (preventing portions) 70 on the left and right sides of the connection base 64. The left and right retaining arms 70 are symmetrical to each other.
　図６に示すように、各抜け止めアーム７０は、前後一対の両外側アーム部７２と１つの接続アーム部７４と１つの内側アーム部７６と１つのガイドアーム部７８とを有している。一対の外側アーム部７２は、接続基部６４の側部の前後両端部から下方（部品取り付け部６８の軸方向先方）へ延在する。外側アーム部７２は、帯板状であって部品取り付け部６８の軸方向後方（上方）から軸方向先方（下方）へ延びている。 As shown in FIG. 6, each retaining arm 70 has a pair of front and rear outer arm portions 72, one connection arm portion 74, one inner arm portion 76, and one guide arm portion 78. The pair of outer arm portions 72 extends downward (in the axial direction of the component mounting portion 68) from both front and rear end portions of the side portion of the connection base portion 64. The outer arm portion 72 has a band plate shape and extends from the rear side (upper) in the axial direction of the component mounting portion 68 to the front side (lower) in the axial direction.
　図５，６に示すように、一対の外側アーム部（第１アーム部）７２は、相互に平行に延出し、部品取り付け部６８の軸線に平行する同一平面上に位置している。外側アーム部７２は、接続基部６４との接続部分を支点として径方向外方に弾性変形いわゆる撓み変形可能に形成されている（図３中、二点鎖線７２参照）。 As shown in FIGS. 5 and 6, the pair of outer arm portions (first arm portions) 72 extend in parallel to each other and are located on the same plane parallel to the axis of the component mounting portion 68. The outer arm portion 72 is formed so as to be elastically deformable, that is, so-called flexibly deformed radially outward with a connection portion with the connection base portion 64 as a fulcrum (see a two-dot chain line 72 in FIG. 3).
　図６に示すように、接続アーム部（接続部）７４は、両外側アーム部７２の先端部（下端部）の相互間に架設されている。接続アーム部７４は、前後方向に延在する帯板状に形成されている。接続アーム部７４は、両外側アーム部７２と同一平面上に配置されている（図５参照）。 As shown in FIG. 6, the connection arm portion (connection portion) 74 is constructed between the distal end portions (lower end portions) of the outer arm portions 72. The connection arm portion 74 is formed in a band plate shape extending in the front-rear direction. The connecting arm portion 74 is disposed on the same plane as the outer arm portions 72 (see FIG. 5).
　図６に示すように、内側アーム部（第２アーム部）７６は、接続アーム部７４の中央部から上方へ延在する帯板状に形成されている。内側アーム部７６は、両外側アーム部７２と平行にかつ同一平面上に配置されている（図５参照）。内側アーム部７６は、接続アーム部７４との接続部分を支点として径方向外方に弾性変形いわゆる撓み変形可能に形成されている（図３中、二点鎖線７６参照）。抜け止めアーム７０には、接続基部６４、両外側アーム部７２、接続アーム部７４及び内側アーム部７６により取り囲まれた逆Ｕ字状の開口溝７９が形成されている。 As shown in FIG. 6, the inner arm portion (second arm portion) 76 is formed in a strip shape extending upward from the center portion of the connection arm portion 74. The inner arm portion 76 is disposed in parallel and on the same plane as the outer arm portions 72 (see FIG. 5). The inner arm portion 76 is formed so as to be elastically deformed, that is, so-called flexibly deformed radially outward with a connection portion with the connection arm portion 74 as a fulcrum (see a two-dot chain line 76 in FIG. 3). The retaining arm 70 is formed with an inverted U-shaped opening groove 79 surrounded by the connection base portion 64, both outer arm portions 72, the connection arm portion 74 and the inner arm portion 76.
　図５－７に示すように、内側アーム部７６の先端部（上端部）は係合部８０とされている。係合部８０の内側面には、圧力調整弁１６の第２ケース半体３０の外周面より僅かに大きい半径を有する断面円弧状の嵌合溝部８１が形成されている。嵌合溝部８１の溝底面は、後述するガイド溝８４の溝底面と接続されている。嵌合溝部８１の前後両側壁部は、内側アーム部７６の残りの部分の内側面よりも内側に突出されている（図３参照）。 As shown in FIG. 5-7, the distal end portion (upper end portion) of the inner arm portion 76 is an engaging portion 80. On the inner side surface of the engaging portion 80, a fitting groove portion 81 having a circular arc cross section having a slightly larger radius than the outer peripheral surface of the second case half 30 of the pressure regulating valve 16 is formed. The groove bottom surface of the fitting groove portion 81 is connected to the groove bottom surface of a guide groove 84 described later. The front and rear side wall portions of the fitting groove portion 81 protrude inward from the inner side surface of the remaining portion of the inner arm portion 76 (see FIG. 3).
　図３に示すように、係合部８０の先端面（上端面）は、部品取り付け部６８の軸線に直交する平面に形成されている。係合部８０の先端面は、部品取り付け部６８に取り付けられた圧力調整弁１６のフランジ４３の下面に当接又は近接されている。換言すると、係合部８０の先端面は、抜け止め側に位置するフランジ４３に対面している。係合部８０は、平面視で、フランジ４３の投影面内に配置されている（図５参照）。 As shown in FIG. 3, the front end surface (upper end surface) of the engaging portion 80 is formed on a plane orthogonal to the axis of the component mounting portion 68. The front end surface of the engaging portion 80 is in contact with or close to the lower surface of the flange 43 of the pressure regulating valve 16 attached to the component attaching portion 68. In other words, the front end surface of the engaging portion 80 faces the flange 43 located on the retaining side. The engaging portion 80 is disposed in the projection plane of the flange 43 in plan view (see FIG. 5).
　図３，６に示すように、ガイドアーム部（ガイド部）７８は、接続アーム部７４の中央部から下方へ延在する帯板状に形成されている。ガイドアーム部７８は、基端部（上端部）から先端部（下端部）に向かって部品取り付け部６８の径方向外方へ所定角度θ（例えば、１５°）で傾く傾斜状に形成されている。 As shown in FIGS. 3 and 6, the guide arm portion (guide portion) 78 is formed in a band plate shape extending downward from the central portion of the connection arm portion 74. The guide arm portion 78 is formed in an inclined shape that is inclined at a predetermined angle θ (for example, 15 °) radially outward of the component mounting portion 68 from the base end portion (upper end portion) to the distal end portion (lower end portion). Yes.
　図３，６に示すように、両抜け止めアーム７０のガイドアーム部７８を除いた残りの部分は、相互に略平行をなしている。該部分は、部品取り付け部６８の軸方向（上下方向）に直線状に延在している。図４，７に示すように、抜け止めアーム７０の前後方向の中央部の内側面には、部品取り付け部６８の軸方向（上下方向）に延在するガイド溝８４が形成されている。ガイド溝８４の溝深さ（図４において紙面表裏方向の寸法）は、浅い。ガイド溝８４の溝幅（前後方向の寸法）は、ガイドアーム部７８の先端（下端）から内側アーム部７６の係合部８０に向かって次第に減少されている。ガイド溝８４の上端は、係合部８０の嵌合溝部８１に接続されている。 As shown in FIGS. 3 and 6, the remaining portions of the both retaining arms 70 excluding the guide arm portion 78 are substantially parallel to each other. The portion extends linearly in the axial direction (vertical direction) of the component mounting portion 68. As shown in FIGS. 4 and 7, a guide groove 84 extending in the axial direction (vertical direction) of the component mounting portion 68 is formed on the inner side surface of the central portion in the front-rear direction of the retaining arm 70. The groove depth of the guide groove 84 (the dimension in the front and back direction in FIG. 4) is shallow. The groove width (the dimension in the front-rear direction) of the guide groove 84 is gradually decreased from the tip (lower end) of the guide arm portion 78 toward the engaging portion 80 of the inner arm portion 76. The upper end of the guide groove 84 is connected to the fitting groove portion 81 of the engaging portion 80.
　次に、部品取り付け部６８に対する圧力調整弁１６の組み付け工程を説明する。 Next, the process of assembling the pressure adjustment valve 16 to the component mounting portion 68 will be described.
［組み付け工程１］図８に示すように、両抜け止めアーム７０のガイドアーム部７８の相互間に圧力調整弁１６が配置される。圧力調整弁１６のフランジ４３の左右両端部は、ガイドアーム部７８のガイド溝８４に嵌合される。なお、圧力調整弁１６には、予めスペーサリング５７、Ｏリング５８，５９が装着されている。 [Assembly Step 1] As shown in FIG. 8, the pressure regulating valve 16 is disposed between the guide arm portions 78 of the both retaining arms 70. The left and right end portions of the flange 43 of the pressure regulating valve 16 are fitted into the guide grooves 84 of the guide arm portion 78. Note that a spacer ring 57 and O- rings 58 and 59 are attached to the pressure adjustment valve 16 in advance.
［組み付け工程２］図９に示すように、部品取り付け部６８に対して圧力調整弁１６が押し込まれる。これにより、フランジ４３がガイド溝８４に沿って上方へ摺動されるにともない、両ガイドアーム部７８がそれぞれ外側アーム部７２の弾性変形を利用して相反方向すなわち径方向外方へ拡開される。 [Assembly Process 2] As shown in FIG. 9, the pressure regulating valve 16 is pushed into the component attachment portion 68. Thereby, as the flange 43 is slid upward along the guide groove 84, both the guide arm portions 78 are expanded in the opposite direction, that is, radially outward using the elastic deformation of the outer arm portion 72, respectively. The
［組み付け工程３］図１０に示すように、部品取り付け部６８に対して圧力調整弁１６がさらに押し込まれる。これにより、フランジ４３がガイド溝８４に沿って上方へ摺動されるにともない、両ガイドアーム部７８がそれぞれ外側アーム部７２の弾性変形を利用してさらに拡開される。 [Assembly Step 3] As shown in FIG. 10, the pressure regulating valve 16 is further pushed into the component attaching portion 68. As a result, as the flange 43 is slid upward along the guide groove 84, both guide arm portions 78 are further expanded using the elastic deformation of the outer arm portion 72.
［組み付け工程４］図１１に示すように、部品取り付け部６８に対して圧力調整弁１６がさらに込まれる。フランジ４３がガイド溝８４を超えて嵌合溝部８１に沿って上方へ摺動される。これにともない、両内側アーム部７６がそれぞれ弾性変形を利用して相反方向すなわち径方向外方へ拡開される。これにともない、圧力調整弁１６の第１ケース半体２９の中段筒部及び上段筒部がＯリング５９と共に接続管部６１の内筒部６２内に挿入される。第１ケース半体２９の下段筒部がＯリング５８と共に嵌合筒部６６内に挿入される。フランジ４３が接続アーム部７４から内側アーム部７６に移行することにより、両外側アーム部７２は、弾性復元力を利用して元の位置に戻る。 [Assembly Process 4] As shown in FIG. 11, the pressure regulating valve 16 is further inserted into the component attachment portion 68. The flange 43 is slid upward along the fitting groove 81 beyond the guide groove 84. Along with this, both inner arm portions 76 are expanded in the opposite direction, that is, radially outward using elastic deformation. Accordingly, the middle cylinder portion and the upper cylinder portion of the first case half 29 of the pressure regulating valve 16 are inserted into the inner cylinder portion 62 of the connection pipe portion 61 together with the O-ring 59. The lower cylinder portion of the first case half 29 is inserted into the fitting cylinder portion 66 together with the O-ring 58. As the flange 43 moves from the connecting arm portion 74 to the inner arm portion 76, the outer arm portions 72 return to their original positions using elastic restoring force.
　図３に示すように、フランジ４３が嵌合筒部６６の下端面に当接又は近接すると、フランジ４３が両内側アーム部７６の係合部８０を通過する。すると、内側アーム部７６が弾性復元することにより、フランジ４３の下面に両内側アーム部７６の係合部８０がスナップフィット係合する。これにより、部品取り付け部６８に圧力調整弁１６が抜け止めされる。この状態において、フランジ４３が嵌合筒部６６の下端面に当接することにより、圧力調整弁１６の部品取り付け部６８に対するさらなる挿入が規制される。フランジ４３が係合部８０の上端面に当接することにより、圧力調整弁１６に作用する燃圧による荷重を保持することができる。上記のようにして、部品取り付け部６８に圧力調整弁１６が軸方向（図３において上下方向）に位置決めされた状態に取り付けられる。 As shown in FIG. 3, when the flange 43 abuts or approaches the lower end surface of the fitting tube portion 66, the flange 43 passes through the engaging portions 80 of both inner arm portions 76. Then, the inner arm portion 76 is elastically restored, so that the engaging portions 80 of the inner arm portions 76 are snap-fit engaged with the lower surface of the flange 43. As a result, the pressure adjustment valve 16 is prevented from coming off at the component mounting portion 68. In this state, when the flange 43 abuts on the lower end surface of the fitting tube portion 66, further insertion of the pressure regulating valve 16 into the component mounting portion 68 is restricted. When the flange 43 comes into contact with the upper end surface of the engaging portion 80, the load due to the fuel pressure acting on the pressure adjusting valve 16 can be held. As described above, the pressure adjusting valve 16 is attached to the component attaching portion 68 in a state of being positioned in the axial direction (vertical direction in FIG. 3).
　図３に示すように、部品取り付け部６８から圧力調整弁１６を取り外す場合には、両内側アーム部７６を同時的に径方向外方へ弾性変形させる。これにより、フランジ４３から係合部８０が係合解除される。この状態で、部品取り付け部６８から圧力調整弁１６を下方へ抜くことができる。 As shown in FIG. 3, when the pressure regulating valve 16 is removed from the component mounting portion 68, both inner arm portions 76 are simultaneously elastically deformed radially outward. Thereby, the engaging part 80 is disengaged from the flange 43. In this state, the pressure regulating valve 16 can be pulled out from the component mounting portion 68.
　次に、部品取り付け部６８の樹脂成形にかかる金型を説明する。図１２に示すように、金型９０は、下側スライド型９２と左右の両側面スライド型９４とを備えている。下側スライド型９２と両側面スライド型９４との型閉じによって、部品取り付け部６８に対応するキャビティが形成されている。なお、図１２は、キャビティに樹脂が充填され、部品取り付け部６８が成形された状態が示されている。 Next, a mold for resin molding of the component mounting portion 68 will be described. As shown in FIG. 12, the mold 90 includes a lower slide mold 92 and left and right side slide molds 94. A cavity corresponding to the component mounting portion 68 is formed by closing the lower slide die 92 and the both side slide die 94. FIG. 12 shows a state where the cavity is filled with resin and the component mounting portion 68 is molded.
　図１２，１３に示すように、下側スライド型９２は、軸方向（上下方向）にスライド可能に設けられている。下側スライド型９２は、側面スライド型９４に向けて上方へ移動して型を閉じる。下側スライド型９２は成形凸部９６を有し、成形凸部９６は、部品取り付け部６８の内周面に対応する成形面を有している。成形凸部９６は、傾斜面９８ａを具備するテーパ状のアンダーカット部９８を有している。アンダーカット部９８は、嵌合筒部６６と内側アーム部７６の間に位置し、部品取り付け部６８の開口溝７９の上辺部を形成する。傾斜面９８ａは、上端から下方に向かって次第にアンダーカット部９８の径を小さくする。 As shown in FIGS. 12 and 13, the lower slide die 92 is provided so as to be slidable in the axial direction (vertical direction). The lower slide mold 92 moves upward toward the side slide mold 94 and closes the mold. The lower slide die 92 has a molding convex portion 96, and the molding convex portion 96 has a molding surface corresponding to the inner peripheral surface of the component mounting portion 68. The forming convex portion 96 has a tapered undercut portion 98 having an inclined surface 98a. The undercut portion 98 is located between the fitting tube portion 66 and the inner arm portion 76 and forms the upper side portion of the opening groove 79 of the component attachment portion 68. The inclined surface 98a gradually decreases the diameter of the undercut portion 98 from the upper end to the lower side.
　図１２，１３に示すように、両側面スライド型９４は、半径方向（左右方向）にスライド可能に設けられており、その対向方向への移動により型閉じされている。両側面スライド型９４は、相互に左右対称状をなしており、成形凹部１００を有している。成形凹部１００は、部品取り付け部６８の外周面の両片半部にそれぞれ対応する成形面を有している。成形凹部１００には、部品取り付け部６８の両開口溝７９にそれぞれ対応する逆Ｕ字状の開口溝成形部１０１が突出されている。開口溝成形部１０１の先端部には、成形凸部９６のアンダーカット部９８の傾斜面９８ａに対応する傾斜面１０１ａが形成されている。 As shown in FIGS. 12 and 13, the double-sided slide mold 94 is provided so as to be slidable in the radial direction (left-right direction), and is closed by movement in the opposite direction. Both side surface slide molds 94 are bilaterally symmetric and have a molding recess 100. The molding recess 100 has molding surfaces corresponding to both half halves of the outer peripheral surface of the component mounting portion 68. An inverted U-shaped opening groove forming portion 101 corresponding to each of the opening grooves 79 of the component mounting portion 68 protrudes from the forming recess 100. An inclined surface 101 a corresponding to the inclined surface 98 a of the undercut portion 98 of the forming convex portion 96 is formed at the tip of the opening groove forming portion 101.
　上記した金型９０のキャビティ内に、燃料配管１８の樹脂射出ゲート（不図示）から樹脂（詳しくは、溶融樹脂）が射出される。これにより、燃料配管１８と共に部品取り付け部６８が成形される。 Resin (specifically, molten resin) is injected from a resin injection gate (not shown) of the fuel pipe 18 into the cavity of the mold 90 described above. Thereby, the component attachment part 68 is molded together with the fuel pipe 18.
　続いて、部品取り付け部６８の樹脂成形後の型抜き工程を説明する。 Subsequently, a die cutting process after resin molding of the component mounting portion 68 will be described.
［型抜き工程１］図１３に示すように、両側面スライド型９４が相反方向へ移動すなわち型開きされる。 [Die-cutting process 1] As shown in FIG. 13, the both-side slide mold 94 is moved in the opposite direction, that is, the mold is opened.
［型抜き工程２］図１４に示すように、下側スライド型９２が下方へ移動される。これにより、下側スライド型９２の嵌合筒部成形部９７とアンダーカット部９８とのなす角部が、両内側アーム部７６の係合部８０の内側面を摺動していく。これにより、両内側アーム部７６が弾性変形を利用して相反方向（径方向外方）へ押しやられる。このため、内側アーム部７６の係合部８０を容易に離型させることができる。 [Die cutting step 2] As shown in FIG. 14, the lower slide die 92 is moved downward. As a result, the corner portion formed by the fitting cylindrical portion forming portion 97 and the undercut portion 98 of the lower slide die 92 slides on the inner side surface of the engaging portion 80 of both inner arm portions 76. Thereby, both the inner side arm parts 76 are pushed to the reciprocal direction (radially outward) using elastic deformation. For this reason, the engaging part 80 of the inner arm part 76 can be easily released.
［型抜き工程３］図１５に示すように、下側スライド型９２がさらに下方へ移動される。これにより、下側スライド型９２の嵌合筒部成形部９７の上端角部が、両内側アーム部７６の係合部８０の内側面を超えることにより、両内側アーム部７６が弾性復元する。そして接続アーム部７４が下側スライド型９２の嵌合筒部成形部９７に弾性的に当接する。 [Die Cutting Step 3] As shown in FIG. 15, the lower slide die 92 is further moved downward. As a result, the upper end corner portion of the fitting cylindrical portion forming portion 97 of the lower slide die 92 exceeds the inner side surface of the engaging portion 80 of both inner arm portions 76, whereby both inner arm portions 76 are elastically restored. Then, the connection arm portion 74 elastically contacts the fitting cylinder portion forming portion 97 of the lower slide die 92.
［型抜き工程４］図１６に示すように、下側スライド型９２がさらに下方へ移動される。これにより、下側スライド型９２の嵌合筒部成形部９７が、両接続アーム部７４を超える。これにより、両外側アーム部７２が元の位置へ弾性復元する。その後、成形品としての部品取り付け部６８を有する燃料配管１８を金型９０のキャビティから取り出す。 [Die-cutting step 4] As shown in FIG. 16, the lower slide die 92 is further moved downward. As a result, the fitting cylindrical portion forming portion 97 of the lower slide die 92 exceeds the connecting arm portions 74. Thereby, both the outer side arm parts 72 are elastically restored to the original position. Thereafter, the fuel pipe 18 having the component mounting portion 68 as a molded product is taken out from the cavity of the mold 90.
　図３に示すように、圧力調整弁１６の取り付け構造は、上述するように抜け止めアーム７０において、外側アーム部７２の径方向外方への弾性変形と、内側アーム部７６の径方向外方への弾性変形との段階的な弾性変形を生じる。これにより、内側アーム部７６の係合部８０が圧力調整弁１６のフランジ４３にスナップフィット係合する。その結果、フランジ４３に対する係合に必要な係合部８０の係合量を確保しつつ、抜け止めアーム７０の径方向外方への弾性変形量を抑制することができる。 As shown in FIG. 3, the pressure adjusting valve 16 is attached to the retaining arm 70 as described above by elastically deforming the outer arm portion 72 radially outward and the inner arm portion 76 radially outward. This causes a gradual elastic deformation with elastic deformation. Thereby, the engaging portion 80 of the inner arm portion 76 is snap-fit engaged with the flange 43 of the pressure regulating valve 16. As a result, it is possible to suppress the amount of elastic deformation of the retaining arm 70 in the radially outward direction while securing the amount of engagement of the engagement portion 80 necessary for engagement with the flange 43.
　図３，６を参照するように、圧力調整弁１６の取り付け構造は、従来例で必要とされたキャップが不要となるため、部品点数及び組み付け工数を削減することができる。抜け止めアーム７０の取り付け構造は、外側アーム部７２と内側アーム部７６とによる２段階の弾性変形を利用している。したがって本構造は、従来例の１段階の弾性変形による弾性係合片と比べて、部品取り付け部６８の軸方向の寸法を短縮しながら、大変位が可能である。このため、抜け止めアーム７０を部品取り付け部６８の軸方向にコンパクトに成形することができ、下側スライド型９２（図１３参照）の型抜き性を向上することができる。 3 and 6, the mounting structure of the pressure regulating valve 16 eliminates the cap required in the conventional example, so that the number of parts and assembly man-hours can be reduced. The attachment structure of the retaining arm 70 utilizes two-stage elastic deformation by the outer arm portion 72 and the inner arm portion 76. Therefore, this structure allows a large displacement while shortening the dimension in the axial direction of the component mounting portion 68 as compared with the elastic engagement piece by one-stage elastic deformation of the conventional example. For this reason, the retaining arm 70 can be compactly formed in the axial direction of the component mounting portion 68, and the moldability of the lower slide die 92 (see FIG. 13) can be improved.
　図８，９に示すように、部品取り付け部６８に圧力調整弁１６を取り付ける際、ガイドアーム部７８によって圧力調整弁１６のフランジ４３が部品取り付け部６８に対して同軸状にガイドされる。このため、圧力調整弁１６を部品取り付け部６８にスムーズに取り付けることができる。 As shown in FIGS. 8 and 9, when the pressure adjusting valve 16 is attached to the component attaching portion 68, the flange 43 of the pressure adjusting valve 16 is guided coaxially with respect to the component attaching portion 68 by the guide arm portion 78. For this reason, the pressure regulating valve 16 can be smoothly attached to the component attaching portion 68.
　図５に示すように、抜け止めアーム７０の外側アーム部７２と内側アーム部７６とが同一平面上に配置されている。したがって、部品取り付け部６８に取り付けられた圧力調整弁１６に作用する燃圧による荷重が両アーム部７２，７６に加わっても、両アーム部７２，７６に径方向外方への分力が作用しにくい。したがって、両アーム部７２，７６の径方向外方へ弾性変形を抑制し、その弾性変形による圧力調整弁１６の抜け外れを抑制することができる。 As shown in FIG. 5, the outer arm 72 and the inner arm 76 of the retaining arm 70 are arranged on the same plane. Therefore, even if a load due to the fuel pressure acting on the pressure adjustment valve 16 attached to the component attachment portion 68 is applied to both arm portions 72 and 76, a component force radially outward acts on both arm portions 72 and 76. Hateful. Therefore, elastic deformation can be suppressed outward in the radial direction of both arm portions 72 and 76, and detachment of the pressure regulating valve 16 due to the elastic deformation can be suppressed.
　図４，６に示すように、両アーム部７４，７６が部品取り付け部６８の軸方向に延在する帯板状に形成されている。内側アーム部７６の係合部８０の上端面が部品取り付け部６８の軸方向に直交する。このため、圧力調整弁１６の組み付け時には、両アーム部７４，７６が径方向外方へ弾性変形しやすい。しかも、組付け後の両アーム部７４，７６は、圧力調整弁１６に作用する燃圧による荷重によって弾性変形しにくく、その荷重に対する保持力が高い。また、圧力調整弁１６のフランジ４３に対する内側アーム部７６の係合部８０の係合面積が大きくとれる。このため、圧力調整弁１６に作用する燃圧による荷重に対する保持力を増大することができる。また、抜け止めアーム７０の数は、偶数とすることで、奇数とする場合と比べて、樹脂成形にかかる型設計を容易化することができる。 As shown in FIGS. 4 and 6, both arm portions 74 and 76 are formed in a strip shape extending in the axial direction of the component mounting portion 68. The upper end surface of the engaging portion 80 of the inner arm portion 76 is orthogonal to the axial direction of the component attaching portion 68. For this reason, when the pressure regulating valve 16 is assembled, both the arm portions 74 and 76 are easily elastically deformed radially outward. In addition, both the arm portions 74 and 76 after assembly are not easily elastically deformed by a load due to the fuel pressure acting on the pressure regulating valve 16, and the holding force against the load is high. Further, the engagement area of the engagement portion 80 of the inner arm portion 76 with respect to the flange 43 of the pressure regulating valve 16 can be increased. For this reason, the holding force with respect to the load by the fuel pressure which acts on the pressure regulation valve 16 can be increased. In addition, by setting the number of retaining arms 70 to be an even number, it is possible to facilitate the mold design for resin molding as compared to the case of an odd number.
［実施形態２］実施形態２は、実施形態１の抜け止めアーム７０の内側アーム部７６（図３参照）を変更した構造を有している。以下、変更した構造について説明し、重複する説明は省略する。図１７に示すように、内側アーム部７６の係合部８０の上端面（詳しくは、嵌合溝部８１の前後両側壁部の上端面）に、係合突起１０３が形成されている。係合突起１０３は、圧力調整弁１６のフランジ４３の段付き凹部４４に係合可能な構成である。係合突起１０３が圧力調整弁１６のフランジ４３の段付き凹部４４に係合する。これにより、内側アーム部７６の係合部８０の径方向外方（図１７において右方）への位置ずれを抑制することができる。 [Embodiment 2] Embodiment 2 has a structure in which the inner arm portion 76 (see FIG. 3) of the retaining arm 70 of Embodiment 1 is changed. Hereinafter, the changed structure will be described, and redundant description will be omitted. As shown in FIG. 17, the engagement protrusion 103 is formed on the upper end surface of the engagement portion 80 of the inner arm portion 76 (specifically, the upper end surfaces of the front and rear side wall portions of the fitting groove portion 81). The engagement protrusion 103 is configured to be engageable with the stepped recess 44 of the flange 43 of the pressure regulating valve 16. The engaging protrusion 103 engages with the stepped recess 44 of the flange 43 of the pressure regulating valve 16. Thereby, the position shift to the radial direction outward (right side in FIG. 17) of the engaging part 80 of the inner side arm part 76 can be suppressed.
［実施形態３］実施形態３は、実施形態１の抜け止めアーム７０（図７参照）を変更した構造を有している。以下、図１８～２４を参照して変更した構造について説明し、重複する説明は省略する。図１８に示すように、内側アーム部７６の係合部８０の両側には、ガイド突起１０５が形成されている。ガイド突起１０５は、下側から上方に向かって径方向外方に傾くガイド斜面１０６を有している。接続アーム部７４は、外側アーム部７２と内側アーム部７６との間に前後一対のガイド斜面１０８を有している。各ガイド斜面１０８は、下側から上方に向かって径方向外方に傾いている。 [Embodiment 3] Embodiment 3 has a structure in which the retaining arm 70 (see FIG. 7) of Embodiment 1 is changed. Hereinafter, the changed structure will be described with reference to FIGS. 18 to 24, and a duplicate description will be omitted. As shown in FIG. 18, guide protrusions 105 are formed on both sides of the engaging portion 80 of the inner arm portion 76. The guide protrusion 105 has a guide slope 106 that is inclined radially outward from the lower side toward the upper side. The connection arm portion 74 has a pair of front and rear guide inclined surfaces 108 between the outer arm portion 72 and the inner arm portion 76. Each guide slope 108 is inclined radially outward from the lower side to the upper side.
　図１９に示すように、下側スライド型９２には、成形斜面（型側の斜面）１１０が形成されている。成形斜面１１０は、内側アーム部７６のガイド突起１０５のガイド斜面１０６に対応している。 As shown in FIG. 19, the lower slide mold 92 is formed with a molding slope (slope on the mold side) 110. The forming slope 110 corresponds to the guide slope 106 of the guide protrusion 105 of the inner arm portion 76.
　図２０に示すように、部品取り付け部６８の樹脂成形時の型抜きに際し、下側スライド型９２が内側アーム部７６に対して下方へ移動する。この時、内側アーム部７６のガイド突起１０５のガイド斜面１０６に対して下側スライド型９２の成形斜面１１０が摺動する。これにより内側アーム部７６の係合部８０が径方向外方へ押しやられる。その結果、内側アーム部７６の係合部８０を容易に離型させることができる。このため、離型時に内側アーム部７６の係合部８０にかかる負荷を軽減する。かくして、その負荷により内側アーム部７６の係合部８０（主に先端部）に発生する欠損を抑制することができる。図２１に示すように、下側スライド型９２の成形斜面１１０がガイド突起１０５のガイド斜面１０６を超えると、内側アーム部７６が元の位置に弾性復元する。 As shown in FIG. 20, the lower slide die 92 moves downward relative to the inner arm portion 76 when the component attaching portion 68 is die-molded during resin molding. At this time, the molding slope 110 of the lower slide mold 92 slides on the guide slope 106 of the guide projection 105 of the inner arm portion 76. Thereby, the engaging portion 80 of the inner arm portion 76 is pushed outward in the radial direction. As a result, the engaging portion 80 of the inner arm portion 76 can be easily released. For this reason, the load concerning the engaging part 80 of the inner side arm part 76 at the time of mold release is reduced. Thus, it is possible to suppress a defect that occurs in the engaging portion 80 (mainly the tip portion) of the inner arm portion 76 due to the load. As shown in FIG. 21, when the forming slope 110 of the lower slide die 92 exceeds the guide slope 106 of the guide protrusion 105, the inner arm portion 76 is elastically restored to the original position.
　図２２に示すように、下側スライド型９２の開口溝成形部１０１の下端部には、成形斜面（片側の斜面）１１２が形成されている。成形斜面１１２は、接続アーム部７４のガイド斜面１０８に対応している。 As shown in FIG. 22, a molding slope (one side slope) 112 is formed at the lower end portion of the opening groove molding portion 101 of the lower slide die 92. The forming slope 112 corresponds to the guide slope 108 of the connection arm portion 74.
　部品取り付け部６８の樹脂成形時の型抜きに際し、図２２，２３に示すように、下側スライド型９２が接続アーム部７４に対して下方へ移動する。この時、接続アーム部７４のガイド斜面１０８に対して下側スライド型９２の成形斜面１１２が摺動する。これにより接続アーム部７４が径方向外方へ押しやられる。上述するように、接続アーム部７４と共に外側アーム部７２及び内側アーム部７６が径方向外方へ押しやられる。その結果、両アーム部７２，７６を容易に下側スライド型９２から離型することができる。このため、離型時に両アーム部７２，７６にかかる負荷を軽減できる。これにより、その負荷により内側アーム部７６（主に係合部８０の先端部）に発生する欠損を抑制することができる。 When the mold is removed during resin molding of the component mounting portion 68, the lower slide die 92 moves downward with respect to the connection arm portion 74 as shown in FIGS. At this time, the molding slope 112 of the lower slide die 92 slides with respect to the guide slope 108 of the connection arm portion 74. As a result, the connecting arm portion 74 is pushed outward in the radial direction. As described above, the outer arm portion 72 and the inner arm portion 76 together with the connecting arm portion 74 are pushed radially outward. As a result, both arm portions 72 and 76 can be easily released from the lower slide die 92. For this reason, the load concerning both the arm parts 72 and 76 at the time of mold release can be reduced. Thereby, the defect | deletion which generate | occur | produces in the inner side arm part 76 (mainly the front-end | tip part of the engaging part 80) by the load can be suppressed.
　図２４に示すように、下側スライド型９２の嵌合筒部成形部９７が接続アーム部７４のガイド斜面１０８を超えると、接続アーム部７４が外側アーム部７２の弾性復元により嵌合筒部成形部９７に当接する。そして、下側スライド型９２の成形斜面１１２が接続アーム部７４のガイド斜面１０８を超えると、内側アーム部７６が元の位置に弾性復元する（図２１参照）。 As shown in FIG. 24, when the fitting tube portion molding portion 97 of the lower slide die 92 exceeds the guide slope 108 of the connection arm portion 74, the connection arm portion 74 is elastically restored by the outer arm portion 72. It abuts on the molded part 97. Then, when the molding slope 112 of the lower slide die 92 exceeds the guide slope 108 of the connection arm portion 74, the inner arm portion 76 is elastically restored to the original position (see FIG. 21).
［実施形態４］実施形態４は、実施形態１の部品取り付け部６８に対する圧力調整弁１６の組み付け工程を変更した工程を有している。以下、図２５，２６を参照して変更した工程について説明し、重複する説明は省略する。図２５に示すように、治具１１４を用いて部品取り付け部６８に圧力調整弁１６を組み付ける。治具１１４は、支柱形状に形成されており、上端部に圧力調整弁１６の第２ケース半体３０を受け入れるＵ字溝１１５を有している。 [Embodiment 4] Embodiment 4 has a process in which the assembly process of the pressure regulating valve 16 to the component mounting portion 68 of Embodiment 1 is changed. Hereinafter, the changed process will be described with reference to FIGS. 25 and 26, and a duplicate description will be omitted. As shown in FIG. 25, the pressure adjustment valve 16 is assembled to the component mounting portion 68 using a jig 114. The jig 114 is formed in a pillar shape, and has a U-shaped groove 115 that receives the second case half 30 of the pressure regulating valve 16 at the upper end.
　図２５，２６に示すように、治具１１４のＵ字溝１１５に圧力調整弁１６の第２ケース半体３０を受け入れる。Ｕ字溝１１５の左右の両側壁部１１６の上端面を圧力調整弁１６のフランジ４３の下端面に当接させる。この状態で、部品取り付け部６８に対して治具１１４と共に圧力調整弁１６を押し上げていく。すると、外側アーム部７２の弾性変形を利用して、治具１１４の左右の両側面が接続アーム部７４及び内側アーム部７６に弾性的に摺動接触しつつ上方へ移動されていく。そして、フランジ４３が接続基部６４に当接した後、治具１１４を下方へ抜き出す。すると、外側アーム部７２が弾性復元することにより、フランジ４３に両内側アーム部７６の係合部８０がスナップフィット係合し、部品取り付け部６８に圧力調整弁１６が抜け止めされる。 25 and 26, the second case half 30 of the pressure regulating valve 16 is received in the U-shaped groove 115 of the jig 114. The upper end surfaces of the left and right side wall portions 116 of the U-shaped groove 115 are brought into contact with the lower end surface of the flange 43 of the pressure regulating valve 16. In this state, the pressure adjustment valve 16 is pushed up together with the jig 114 with respect to the component mounting portion 68. Then, using the elastic deformation of the outer arm portion 72, the left and right side surfaces of the jig 114 are moved upward while elastically sliding and contacting the connection arm portion 74 and the inner arm portion 76. Then, after the flange 43 comes into contact with the connection base 64, the jig 114 is extracted downward. Then, the outer arm portion 72 is elastically restored, and the engaging portions 80 of the inner arm portions 76 are snap-fit engaged with the flange 43, and the pressure adjusting valve 16 is prevented from coming off at the component attaching portion 68.
［実施形態５］実施形態５は、実施形態１の抜け止めアーム７０（図５参照）を変更した構成を有している。以下、図２７を参照して変更した構成について説明し、重複する説明は省略する。図２７に示すように、部品取り付け部６８は、周方向に等間隔で３つの抜け止めアーム７０を有している。このように抜け止めアーム７０を３つに増やすことで、圧力調整弁１６の抜け外れを一層抑制することができる。 [Embodiment 5] Embodiment 5 has a configuration in which the retaining arm 70 (see FIG. 5) of Embodiment 1 is changed. Hereinafter, the changed configuration will be described with reference to FIG. 27, and redundant description will be omitted. As shown in FIG. 27, the component mounting portion 68 has three retaining arms 70 at equal intervals in the circumferential direction. In this way, by increasing the number of retaining arms 70 to three, it is possible to further prevent the pressure regulating valve 16 from coming off.
［実施形態６］実施形態６は、実施形態１の抜け止めアーム７０（図５参照）を変更した構成を有している。以下、図２８を参照して変更した構成について説明し、重複する説明は省略する。図２８に示すように、部品取り付け部６８は、周方向に等間隔で４つの抜け止めアーム７０を有している。このように抜け止めアーム７０を４つに増やすことで、圧力調整弁１６の抜け外れを一層抑制することができる。また、抜け止めアーム７０の数は、偶数であるので、樹脂成形にかかる型設計を容易化することができる。 [Embodiment 6] Embodiment 6 has a configuration in which the retaining arm 70 (see FIG. 5) of Embodiment 1 is changed. Hereinafter, the changed configuration will be described with reference to FIG. 28, and redundant description will be omitted. As shown in FIG. 28, the component mounting portion 68 has four retaining arms 70 at equal intervals in the circumferential direction. Thus, by increasing the number of retaining arms 70 to four, it is possible to further prevent the pressure regulating valve 16 from coming off. Further, since the number of retaining arms 70 is an even number, the mold design for resin molding can be facilitated.
［他の実施形態］本発明は上記実施形態に限定されるものではなく、本発明を逸脱しない範囲における変更が可能である。本発明は、圧力調整弁１６に限らず、その他の燃料系部品、例えば、燃料配管１８内の燃圧を検出する燃圧センサ等の取り付け構造に適用してもよい。また、圧力調整弁１６は、ダイヤフラム４１式の他、ベローズ式、リリーフ弁式等の圧力調整弁１６でもよい。また、抜け止めアーム７０の数は他の任意の数でよい。また、ガイドアーム部７８は省略してもよい。また、ガイド斜面１０６を係合部８０自体に形成し、ガイド突起１０５を省略してもよい。また、ガイド斜面１０８は、接続アーム部７４自体に代え、ガイド斜面１０８を有するガイド突起を接続アーム部７４に形成してもよい。 [Other Embodiments] The present invention is not limited to the above-described embodiments, and modifications can be made without departing from the present invention. The present invention is not limited to the pressure regulating valve 16 and may be applied to other fuel system parts, for example, a mounting structure such as a fuel pressure sensor for detecting the fuel pressure in the fuel pipe 18. Further, the pressure regulating valve 16 may be a pressure regulating valve 16 such as a bellows type or a relief valve type in addition to the diaphragm 41 type. The number of retaining arms 70 may be any other number. Further, the guide arm portion 78 may be omitted. Further, the guide slope 106 may be formed on the engaging portion 80 itself, and the guide protrusion 105 may be omitted. The guide slope 108 may be formed with a guide projection having the guide slope 108 on the connection arm 74 instead of the connection arm 74 itself.

Claims (6)

  1. 　燃料系部品の取り付け構造であって、
    　外周部にフランジを有する燃料系部品と、
    　前記燃料系部品を受け入れて支持する部品取り付け部を有する燃料配管を有し、
    　前記部品取り付け部には、前記フランジをスナップフィット係合により抜け止めする抜け止め部が形成され、
    　前記抜け止め部は、第１アーム部と接続部と第２アーム部とを有し、
    　前記第１アーム部は、前記部品取り付け部から軸方向先方に延在されかつ径方向外方へ弾性変形可能に形成され、
    　前記接続部は、前記第１アーム部の軸方向先端部に形成され、
    　前記第２アーム部は、前記接続部から軸方向後方に延在され、その先端部に前記燃料系部品のフランジに係合する係合部を有しかつ径方向外方へ弾性変形可能に形成されている、燃料系部品の取り付け構造。     A fuel system component mounting structure,
    A fuel system component having a flange on the outer periphery;
    A fuel pipe having a component mounting portion for receiving and supporting the fuel system component;
    The component mounting portion is formed with a retaining portion for retaining the flange by snap-fit engagement,
    The retaining portion includes a first arm portion, a connection portion, and a second arm portion,
    The first arm portion is formed so as to extend axially forward from the component mounting portion and to be elastically deformable radially outward.
    The connecting portion is formed at an axial tip portion of the first arm portion,
    The second arm portion extends rearward in the axial direction from the connection portion, and has an engaging portion that engages with a flange of the fuel system component at a tip portion thereof, and is formed to be elastically deformable radially outward. Installation structure for fuel system parts.
  2. 　請求項１に記載の燃料系部品の取り付け構造であって、
    　前記接続部には、軸方向先方へ延在されかつ前記部品取り付け部に対して前記フランジを同軸状にガイドするガイド部が形成されている、燃料系部品の取り付け構造。     The fuel system component mounting structure according to claim 1,
    A fuel system component mounting structure in which the connecting portion is formed with a guide portion that extends axially forward and guides the flange coaxially with respect to the component mounting portion.
  3. 　請求項１又は２に記載の燃料系部品の取り付け構造であって、
    　前記第１アーム部と前記第２アーム部は、同一平面上に配置されている、燃料系部品の取り付け構造。     A fuel system component mounting structure according to claim 1 or 2,
    The fuel system component mounting structure, wherein the first arm portion and the second arm portion are arranged on the same plane.
  4. 　請求項１～３のいずれか１つに記載の燃料系部品の取り付け構造であって、
    　前記フランジの抜け止め側の内周部には、段付き凹部が形成されており、
    　前記第２アーム部の係合部には、前記段付き凹部に係合可能な係合突起が形成されている、燃料系部品の取り付け構造。     A fuel system component mounting structure according to any one of claims 1 to 3,
    A stepped recess is formed in the inner peripheral portion of the flange on the retaining side,
    An attachment structure for a fuel system component, wherein an engagement protrusion that can be engaged with the stepped recess is formed on the engagement portion of the second arm portion.
  5. 　請求項１～４のいずれか１つに記載の燃料系部品の取り付け構造であって、
    　前記第２アーム部の係合部には、部品取り付け部の軸方向先端側から軸方向後方に向かって径方向外方に傾くガイド斜面が形成されている、燃料系部品の取り付け構造。     The fuel system component mounting structure according to any one of claims 1 to 4,
    A fuel system component mounting structure in which an engaging slope of the second arm portion is formed with a guide slope inclined radially outward from the tip end side in the axial direction of the component mounting portion toward the rear in the axial direction.
  6. 　請求項１～５のいずれか１つに記載の燃料系部品の取り付け構造であって、
    　前記接続部には、部品取り付け部の軸方向先端側から軸方向後方に向かって径方向外方に傾くガイド斜面が形成されている、燃料系部品の取り付け構造。     A fuel system component mounting structure according to any one of claims 1 to 5,
    A fuel system component mounting structure in which the connecting portion is formed with a guide slope inclined radially outward from the tip end side in the axial direction of the component mounting portion toward the rear in the axial direction.
PCT/JP2018/001396 2017-02-09 2018-01-18 Mounting structure for fuel system component WO2018147031A1 (en)

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JP7305577B2 (en) * 2020-02-13 2023-07-10 愛三工業株式会社 pressure regulator

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