WO2021145167A1 - Intake manifold - Google Patents

Intake manifold Download PDF

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Publication number
WO2021145167A1
WO2021145167A1 PCT/JP2020/047902 JP2020047902W WO2021145167A1 WO 2021145167 A1 WO2021145167 A1 WO 2021145167A1 JP 2020047902 W JP2020047902 W JP 2020047902W WO 2021145167 A1 WO2021145167 A1 WO 2021145167A1
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WIPO (PCT)
Prior art keywords
welding
welded portion
welded
resin molded
molded body
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PCT/JP2020/047902
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French (fr)
Japanese (ja)
Inventor
敬之 林
Original Assignee
株式会社ミクニ
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Publication of WO2021145167A1 publication Critical patent/WO2021145167A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a resin intake manifold applied to the intake system of an engine, and more particularly to an intake manifold formed by joining preformed resin molded members to each other by vibration welding.
  • Patent Document 1 and Patent Document 2 As a conventional intake manifold, one in which two preformed resin molded members are vibration-welded in order to define a surge tank and a plurality of branch pipes is known (see, for example, Patent Document 1 and Patent Document 2). ).
  • one resin molding member is provided with a first welded portion forming a ridge having a constant width and two burr concealing ribs sandwiching the first welded portion, and the other resin molding member is opposed to the first welded portion.
  • a second welded portion having a certain width of ridges is provided, and both resin molding members are pressed against each other to vibrate, thereby vibrating the first welded portion and the second welded portion.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to prevent burrs from protruding due to vibration welding without causing an increase in size, complexity, etc.
  • An object of the present invention is to provide an intake manifold capable of increasing mechanical strength and the like.
  • the intake manifold of the present invention is an intake manifold formed by vibration welding of a first resin molded body and a second resin molded body in order to define a surge tank and a plurality of branch pipes, and the first resin molded body is a first resin molded body.
  • the second resin molded body includes a first flange portion and a first convex welded portion protruding from the first flange portion, and the second resin molded body protrudes from the second flange portion and the second flange portion facing the first flange portion.
  • the second ridge welded part to be joined to the one ridge welded part and the first flange part are projected from the second flange part in order to define the burr accumulation space inside and outside of the second ridge welded part, respectively.
  • the structure includes a width welded portion and a widened welded portion formed to be wider than the reference width welded portion.
  • the widening welded portions may be arranged discretely in the vibration direction of the vibration weld.
  • the first ridge welded portion and the second ridge welded portion are convex in the opposite direction in which the extension welding region extending in the vibration direction of the vibration welding and the first flange portion and the second flange portion face each other.
  • a configuration may be adopted in which a curved welding region that is curved in a shape is included and a widening welding portion is provided in an extension welding region.
  • the second convex welded portion includes the reference width welded portion and the widened welded portion, and the welded width dimension of the widened welded portion of the second convex welded portion is the welded width dimension of the first convex welded portion.
  • the configuration formed below may be adopted.
  • a configuration may be adopted in which the cross-sectional area occupied by the melting allowance in the widened welded portion is set to 0.75 to 1 times the cross-sectional area of the burr storage space.
  • the widening welded portion may adopt a configuration provided in the area where the branch pipe is arranged.
  • the first resin molded body includes a plurality of branch pipes, a first outer wall portion that continuously defines a part of a surge tank in the plurality of branch pipes, the first flange portion, and the first.
  • the second resin molded body includes a ridge welded portion, and the second resin molded body includes a second outer wall portion that defines a surge tank in cooperation with the first outer wall portion, the second flange portion, and the second ridge welded portion.
  • a configuration may be adopted that includes the inner rib and the outer rib.
  • the intake manifold having the above configuration, it is possible to prevent the burrs from protruding due to vibration welding and to increase the pressure resistance strength, the mechanical strength, etc., without causing the increase in size and complexity.
  • FIG. 5 is an exploded perspective view showing a state before the first resin molded body and the second resin molded body constituting the intake manifold shown in FIG. 1 are welded. It is a perspective view which shows the 1st resin molded body which constitutes an intake manifold. It is a perspective view which shows the 2nd resin molded body which constitutes an intake manifold. It is a front view which looked at the 2nd flange part of the 2nd resin molded body from the front. In the intake manifold shown in FIG.
  • FIG. 1 a cross-sectional view showing a welded state between a first convex welded portion of a first resin molded body and a second convex welded portion in a region of a reference width welded portion of a second resin molded body.
  • FIG. 1 it is a cross-sectional view showing a welded state between a first convex welded portion of a first resin molded body and a second convex welded portion in a region of a widened welded portion of a second resin molded body. ..
  • FIG. 1 It is a perspective cross-sectional view which shows the welding state in the curved region of the 1st flange part of the 1st resin molded part and the 2nd flange part of a 2nd resin molded body.
  • Schematic diagram illustrating the melting allowance of the second ridge welded portion (reference width welded portion) in the welding of the first ridge welded portion of the first resin molded body and the second ridge welded portion of the second resin molded body.
  • the intake manifold according to the present invention is formed by using a resin material and is arranged between a throttle device located downstream of an intake duct in the intake system of an engine and a cylinder head of the engine. As shown in FIGS. 1 and 2, the intake manifold M according to the embodiment vibrates the first resin molded body 10 and the second resin molded body 20 in order to define the surge tank T and the plurality of branch pipes 11. It is formed by integrally joining by welding.
  • the first resin molded body 10 is previously molded by a mold using a thermoplastic resin material, and is formed long in the axis L direction as shown in FIGS. 1 to 3, and has three branch pipes. 11.
  • the first outer wall portion 12, the upstream flange portion 13, the first flange portion 14, and the first ridge welded portion 15 are provided.
  • a part of the three branch pipes 11 is shown in a state where the flange portion connected to the cylinder head is omitted, and the three branch pipes 11 are formed so as to be arranged in the L direction of the axis so as to communicate with the intake port of the cylinder head. It is to be placed.
  • the first outer wall portion 12 is formed in a semi-cylindrical shape that is continuous with the three branch pipes 11 and defines a part of a substantially cylindrical surge tank T.
  • the upstream flange portion 13 defines a circular inlet 13a on the upstream side of the surge tank T, and includes a joint surface 13b for joining the throttle device and four screw holes 13c for screwing the fastening screw.
  • the first flange portion 14 is formed in an annular shape, and has two extension regions 14a and 14a and two extension regions 14a and 14a extending in the axis L direction parallel to the vibration direction Vd during vibration welding.
  • a U-turn region 14b connecting the two extending regions 14b, a curved region 14c adjacent to the surface opposite to the joint surface 13b of the upstream flange portion 13, and two bending regions 14d connecting the two extension regions 14a and 14a and the curved region 14c, It has 14d.
  • the two extension regions 14a and 14a extend in the L direction along the axis parallel to each other.
  • the two extension regions 14a and 14a, the U-turn region 14b, and the two bending regions 14d and 14d are formed as flat surfaces P1 located on the same plane parallel to the plane including the axis L.
  • the curved region 14c is convexly curved toward the second flange portion 24 in the facing direction Fd facing the second flange portion 24 of the second resin molded body 20, that is, from the flat surface P1 to the facing direction Fd. It is formed as a convex curved surface C1 that protrudes in a substantially semicircular convex shape and is parallel to the vibration direction Vd.
  • the first ridge welded portion 15 is welded to the second ridge welded portion 25 of the second resin molded body 20 by vibration welding, and as shown in FIG. 3, the flat surface P1 of the first flange portion 14 It is formed so as to protrude from the convex curved surface C1 in the facing direction Fd.
  • the first ridge welding portion 15 includes two extension welding regions 15a and 15a, a U-turn welding region 15b, a curved welding region 15c, and two bending welding regions 15d and 15d.
  • the two extension welding regions 15a and 15a are formed in the two extension regions 14a and 14a of the first flange portion 14, and as shown in FIGS. 6 and 7, project as the dimensions after welding in the cross section perpendicular to the axis L. It has a rectangular cross section with a height H1 and a welding width W1.
  • the U-turn welding region 15b is formed in the U-turn region 14b of the first flange portion 14, and has a rectangular cross section having a protruding height H1 and a welding width W1 as dimensions after welding, similarly to the two extended welding regions 15a and 15a. Make.
  • the curved welding region 15c is formed in the curved region 14c of the first flange portion 14, and has a rectangular cross section having a protruding height H1 and a welding width W1 as dimensions after welding.
  • the welding width of the curved welding region 15c may be formed narrower than the welding width W1.
  • the two bent welding regions 15d and 15d are formed in the bent regions 14d and 14d of the first flange portion 14, and form a rectangular cross section having a protruding height H1 and a welding width W1 as the dimensions after welding.
  • the welding width of the bent welding region 15d may be formed narrower than the welding width W1.
  • the second resin molded body 20 is previously molded by a mold using a thermoplastic resin material, and is formed long in the axis L direction as shown in FIGS. 1, 2, 4, and 5.
  • the second outer wall portion 22, the second flange portion 24, the second convex welded portion 25, the inner rib 26, and the outer rib 27 are provided.
  • the second outer wall portion 22 is formed in a semi-cylindrical shape that defines a part of the surge tank T that has a substantially cylindrical shape.
  • the second flange portion 24 is formed in an annular shape, and has two extension regions 24a and 24a and two extension regions 24a and 24a extending in the axis L direction parallel to the vibration direction Vd during vibration welding. It is provided with a U-turn region 24b, a curved region 24c, and two bent regions 24d, 24d connecting the two extended regions 24a, 24a and the curved region 24c.
  • the two extension regions 24a and 24a extend in the L direction along the axis parallel to each other.
  • the two extension regions 24a and 24a, the U-turn region 24b, and the two bending regions 24d and 24d are formed as flat surfaces P2 located on the same plane parallel to the plane including the axis L.
  • the curved region 24c is concavely curved toward the first flange portion 14 in the facing direction Fd facing the first flange portion 14 of the first resin molded body 10, that is, substantially from the flat surface P2 to the facing direction Fd. It is formed as a concave curved surface C2 that is recessed in a semicircular shape and is parallel to the vibration direction Vd.
  • the second ridge welded portion 25 is welded to the first ridge welded portion 15 of the first resin molded body 10 by vibration welding, and as shown in FIG. 4, the flat surface P2 of the second flange portion 24 It is formed so as to project from the concave curved surface C2 in the opposite direction Fd.
  • the second ridge welding portion 25 includes two extension welding regions 25a and 25a, a U-turn welding region 25b, a curved welding region 25c, and two bending welding regions 25d and 25d. ..
  • One extension welding region 25a is formed in one extension region 24a of the second flange portion 24 as shown in FIGS. 4 and 5, and is formed in a cross section perpendicular to the axis L as shown in FIGS. 6 and 7.
  • the reference width welding portion 25a 1 forming a rectangular cross section of the protruding height H2 and the welding width W2, and the rectangular cross section of the height H2 and the welding width W2w as the dimensions after welding in the cross section perpendicular to the axis L. It is formed so as to include the widened welded portion 25a 2 forming the above.
  • the widened welded portions 25a 2 have a substantially rectangular parallelepiped shape having an angle R having a predetermined length in the axis L direction when viewed from the facing direction Fd, and are discretely arranged in the vibration direction Vd of the vibration welding.
  • the three widening welded portions 25a 2 are arranged at equal intervals in the axis L direction and are arranged in the region where the branch pipe 11 is arranged.
  • the welding width W2w of the widened welding portion 25a 2 is formed to be wider than the welding width W2 of the reference width welding portion 25a 1.
  • the dimension of the welding width W2w is formed to be the same as the dimension of the welding width W1 of the extended welding region 15a of the first convex welding portion 15.
  • the welding width W2w is appropriately selected within a range larger than the welding width W2 and equal to or less than the welding width W1.
  • the other extension welding region 25a is formed in the other extension region 24a of the second flange portion 24, and as shown in FIGS. 6 and 7, the protrusion height H2 and the protrusion height H2 and the dimensions after welding are the dimensions after welding in the cross section perpendicular to the axis L. It has a rectangular cross section with a welding width W2. That is, the other extended weld region 25a is only reference width welded portion 25a 1, but does not include a widening weld portion 25a 2, a form including the widening welded portion 25a 2 like the one elongated weld region 25a You may.
  • the U-turn welding region 25b is formed in the U-turn region 24b of the second flange portion 24, and has the protrusion height H2 and the protrusion height H2 as the dimensions after welding as the reference width welding portion 25a 1 of the two extension welding regions 25a and 25a. It has a rectangular cross section with a welding width W2.
  • the curved welding region 25c is formed in the curved region 24c of the second flange portion 24, and has a rectangular cross section having a protruding height H2 and a welding width W2 as dimensions after welding.
  • the welding width of the curved welding region 25c may be formed narrower than the welding width W2.
  • the two bent welding regions 25d and 25d are formed in the bent regions 24d and 24d of the second flange portion 24, and form a rectangular cross section having a protruding height H2 and a welding width W2 as the dimensions after welding.
  • the welding width of the bent welding region 25d may be formed narrower than the welding width W2.
  • the inner rib 26 is formed as a thin-walled piece that projects substantially annularly from the second flange portion 24 in the opposite direction Fd with a distance D from the second convex welded portion 25. 2
  • the burr accumulation space Si inside is defined in cooperation with the ridge welding portion 25, and the inner wall surface thereof defines a part of the inner wall surface of the surge tank T.
  • the inner rib 26 is not provided in the curved region 24c of the second flange portion 24. The reason is that in the second flange portion 24 of the second resin molded body 20, a sufficient space is defined in the curved region 24c, so that burrs can be captured in this space, and vibration welding is also possible.
  • the outer rib 27 is formed as a thin-walled piece that annularly protrudes from the second flange portion 24 in the opposite direction Fd with a distance D from the second convex welded portion 25.
  • the outer burr storage space So is defined in cooperation with the ridge welding portion 25, and the outer wall surface of the outer wall surface defines a part of the outer contour.
  • the end faces of the inner rib 26 and the outer rib 27 are the first flange of the first resin molded body 10 in a state where the first resin molded body 10 and the second resin molded body 20 are integrally joined by vibration welding. Closely opposed to the portion 14. As a result, the burr storage spaces Si and So are substantially closed, and it is possible to prevent burrs generated by vibration welding from protruding from the burr storage space Si into the surge tank T, and from the burr storage space So to the outside. It can be prevented from sticking out.
  • the relationship between the melting allowance of the second convex welded portion 25 and the burr accumulation spaces Si and So is the total of the burr accumulation spaces Si and So in the cross section perpendicular to the axis L.
  • S be the cross-sectional area of St
  • the cross-sectional area occupied by the melting allowance of the reference width welding portion 25a 1 be S1
  • the cross-sectional area indicated by the melting allowance of the widened welding portion 25a 2 S2.
  • S2: St 1: 1 to 1.5.
  • the cross-sectional area St in the region of the widened welded portion 25a 2 is slightly narrower than the cross-sectional area St in the region of the reference width welded portion 25a 1 , but here, the cross-sectional area St in the region of the widened welded portion 25a 2 is used. It is calculated as a reference value. That is, the cross-sectional area S2 occupied by the melting allowance in the widened welded portion 25a 2 is set to 0.75 to 1 times the cross-sectional area St of the burr accumulation spaces Si and So. According to the above configuration, the burrs generated by the melting of the reference width welding portion 25a 1 flow into the burr storage spaces Si and So adjacent to the inside and the outside.
  • the burrs generated by the melting of the widened welding portion 25a 2 flow into the burr storage spaces Si and So adjacent to the inside and the outside, and also flow into the burr storage spaces Si and So adjacent to the inside and the outside of the reference width welding portion 25a 1. It flows in. Therefore, it is possible to prevent the burrs from protruding due to the melting of the widened welded portion 25a 2.
  • the burrs generated by the melting of the widening welding portions 25a 2 are moved in the vibration direction Vd. , It can be positively guided to the burr storage spaces Si and So defined around the reference width welding portion 25a 1 located between the widening welding portions 25a 2.
  • the burr accumulation spaces Si and So defined around the reference width welding portion 25a 1 can be widened and welded in the widening welding portion 25a 2 without causing the first flange portion 14 and the second flange portion 24 to be widened or enlarged. It can be effectively used as an escape space for burrs generated by melting, and it is possible to increase the pressure resistance and mechanical strength and prevent the burrs from sticking out.
  • the vibration welding of the intake manifold M will be described.
  • the first resin molded body 10 is fixed to the lower jig, and the second resin molded body 20 is fixed to the upper jig.
  • pressure is applied so that the first ridge welded portion 15 of the first resin molded body 10 comes into contact with the second ridge welded portion 25 of the second resin molded body 20 via the lower jig.
  • the second resin molded body 20 is reciprocally vibrated with respect to the second resin molded body 20 in the vibration direction Vd via the upper jig, and vibration welding is performed.
  • the vibration frequency is 200 Hz to 250 Hz
  • the amplitude is in the range of 0.5 mm to 2.0 mm.
  • frictional heat is generated on the contact surface between the first ridge welding portion 15 and the second ridge welding portion 25, and the second ridge welding portion 25 is positively melted and welded.
  • the relatively heavy first resin molded body 10 integrally including the upstream flange portion 13 and the three branch pipes 11 is statically held, and the semi-cylindrical relatively lightweight second resin molded body is molded. Since the body 20 is reciprocally vibrated, vibration welding can be efficiently performed. Further, the vibration direction Vd of the vibration welding is the axis L direction of the first outer wall portion 12 and the second outer wall portion 22 defining the surge tank T of the intake manifold M, that is, the first convex welded portion 15 and the second convex. Since the direction is along the extension regions 15a and 25a of the welding portion 25, vibration welding can be performed even though the curved welding regions 15c and 25c that are convexly curved in the opposite direction Fd are included.
  • the reference width weld portion 25a It can be positively guided to the burr storage spaces Si and So adjacent to the inside and the outside of 1.
  • the generated burr B is prevented from protruding to the outside of the burr storage spaces Si and So. be able to.
  • the pressure resistance strength and mechanical resistance of the intake manifold M are not increased without increasing the width dimension of the first resin molded body 10 and the second resin molded body 20 and increasing the overall size.
  • the strength can be increased.
  • FIG. 12 shows another embodiment of the second ridge welded portion according to the present invention.
  • the second convex welded portion 125 according to this embodiment has a widened shape in the shape of a rectangular parallelepiped or a cube whose length is shorter than the shape of the widened welded portion 25a 2 of the second convex welded portion 25 described above.
  • the welded portion 125a 2 is adopted. According to this embodiment, the distance until the burr B generated by the melting of the widening welded portion 125a 2 reaches the burr storage spaces Si and So adjacent to the inside and the outside of the reference width welding portion 25a 1 is shortened.
  • the burrs B generated by melting the widened welded portion 125a 2 can be easily guided to the burr storage spaces Si and So adjacent to the inside and outside of the reference width welded portion 25a 1.
  • the generated burr B is prevented from protruding to the outside of the burr storage spaces Si and So. be able to.
  • the pressure resistance strength and mechanical resistance of the intake manifold M are not increased without increasing the width dimension of the first resin molded body 10 and the second resin molded body 20 and increasing the overall size. The strength can be increased.
  • FIG. 13 shows still another embodiment of the second ridge welded portion according to the present invention.
  • the second convex welded portion 225 according to this embodiment has an ellipse or a circle having a shorter length and a rounded shape than the shape of the widened welded portion 25a 2 of the second convex welded portion 25 described above.
  • the widened welded portion 225a 2 having a shape is adopted.
  • the burr B caused by the melting of the widening weld portion 225a 2 is burr reservoir space Si adjacent to the inner and outer reference width welded portion 25a 1, easily flow into So., widening the welding portion 225a 2
  • the burrs B generated by the melting of the burrs can be easily guided to the burrs storage spaces Si and So adjacent to the inside and the outside of the reference width welding portion 25a 1.
  • the generated burr B is prevented from protruding to the outside of the burr storage spaces Si and So. be able to.
  • the pressure resistance strength and mechanical resistance of the intake manifold M are not increased without increasing the width dimension of the first resin molded body 10 and the second resin molded body 20 and increasing the overall size.
  • the strength can be increased.
  • the widening welded portion 25a 2 is provided in one of the two extended welding regions 25a and 25a, but the present invention is not limited to this.
  • a plurality of widening welding portions 25a 2 may be provided in each of the two extension welding regions 25a and 25a.
  • the configuration in which the widening welding portion 25a 2 is provided corresponding to the region where the branch pipe 11 is arranged is shown, but the present invention is not limited to this, and the widening welding portion is provided in other regions. You may.
  • the dimension of the welding width W2w of the widened welding portion 25a 2 shows the same configuration as the dimension of the welding width W1 of the first convex welded portion 15, but the present invention is not limited to this, and W2 It can be appropriately selected within the range of ⁇ W2w ⁇ W1.
  • the reference width welding portion 25a 1 and the widening welding portion 25a 2 are provided for the second ridge welding portion 25 as one of the first ridge welding portion 15 and the second ridge welding portion 25.
  • the present invention is not limited to this, and a configuration in which a reference width welding portion and a widening welding portion are provided with respect to the first convex welded portion 15 may be adopted.
  • the intake manifold of the present invention it is possible to prevent the burrs from protruding due to vibration welding and to increase the pressure resistance strength, the mechanical strength, etc., without causing an increase in size or complexity. Therefore, it is of course applicable to the intake system of an engine mounted on an automobile or the like, and is also useful in the intake system of an engine mounted on a two-wheeled vehicle or other vehicle or an engine used as a single unit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

An intake manifold (M) according to the present invention is formed by vibration-welding a first resin molded body and a second resin molded body so as to define a surge tank and a plurality of branch pipes. The first resin molded body (10) includes a first flange part (14) and a first projecting welding portion (15) protruding from the first flange part. The second resin molded body (20) includes: a second flange part (24) facing the first flange part; a second projecting welding portion (25) which protrudes from the second flange part and is welded with the first projecting welding portion; and an inner rib (26) and an outer rib (27) which sandwich the second projecting welding portion, protrude from the second flange part so as to define burr storage spaces (Si, So) on the inner side and the outer side, and face the first flange part. The second projecting welding portion (25) includes a reference width welding portion (25a１) and a wide width welding portion (25a２) having an expanded welding width.

Description

インテークマニホールドIntake manifold
　本発明は、エンジンの吸気系に適用される樹脂製のインテークマニホールドに関し、特に、予め成形された樹脂成形部材同士を振動溶着により接合して形成されるインテークマニホールドに関する。 The present invention relates to a resin intake manifold applied to the intake system of an engine, and more particularly to an intake manifold formed by joining preformed resin molded members to each other by vibration welding.
　従来のインテークマニホールドとしては、サージタンク及び複数の分岐管を画定するべく、予め成形された二つの樹脂成形部材を振動溶着するものが知られている（例えば、特許文献１、特許文献２を参照）。
　例えば、一方の樹脂成形部材に、一定幅の凸条をなす第１溶着部と、第１溶着部を挟んで二つのバリ隠しリブを設け、他方の樹脂成形部材に、第１溶着部と対向する一定幅の凸条をなす第２溶着部を設け、両方の樹脂成形部材を互いに押し付けて振動させることにより、第１溶着部と第２溶着部とを振動溶着するものである。 As a conventional intake manifold, one in which two preformed resin molded members are vibration-welded in order to define a surge tank and a plurality of branch pipes is known (see, for example, Patent Document 1 and Patent Document 2). ).
For example, one resin molding member is provided with a first welded portion forming a ridge having a constant width and two burr concealing ribs sandwiching the first welded portion, and the other resin molding member is opposed to the first welded portion. A second welded portion having a certain width of ridges is provided, and both resin molding members are pressed against each other to vibrate, thereby vibrating the first welded portion and the second welded portion.
　このようなインテークマニホールドにおいて、耐圧強度を高めるには、例えば、溶着部の溶着幅を全体的に拡大し、その拡大寸法に比例して二つのバリ隠しリブの間隔等を拡大することが考えられる。
　しかしながら、この手法では、二つの樹脂成形部材を接合するフランジ部の大型化、さらにはインテークマニホールド全体の大型化を招くため、車両側の配置スペースに制約がある場合にはその適用が困難である。 In such an intake manifold, in order to increase the pressure resistance strength, for example, it is conceivable to increase the welding width of the welded portion as a whole and increase the distance between the two burr concealing ribs in proportion to the enlarged dimension. ..
However, this method causes an increase in the size of the flange portion that joins the two resin molded members and an increase in the size of the entire intake manifold, so that it is difficult to apply the method when the arrangement space on the vehicle side is limited. ..
特開２００６－１２５２２７号公報Japanese Unexamined Patent Publication No. 2006-125227 特開２０１８－１７１７１２号公報JP-A-2018-1717112
　本発明は、上記の事情に鑑みて成されたものであり、その目的とするところは、大型化、複雑化等を招くことなく、振動溶着により生じるバリのはみ出しを防止して、耐圧強度、機械的強度等を高めることのできるインテークマニホールドを提供することにある。 The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent burrs from protruding due to vibration welding without causing an increase in size, complexity, etc. An object of the present invention is to provide an intake manifold capable of increasing mechanical strength and the like.
　本発明のインテークマニホールドは、サージタンク及び複数の分岐管を画定するべく第１樹脂成形体及び第２樹脂成形体の振動溶着により形成されるインテークマニホールドであって、第１樹脂成形体は、第１フランジ部と、第１フランジ部から突出する第１凸条溶着部を含み、第２樹脂成形体は、第１フランジ部と対向する第２フランジ部と、第２フランジ部から突出すると共に第１凸条溶着部と接合される第２凸条溶着部と、第２凸条溶着部を挟んで内側及び外側にそれぞれバリ溜め空間を画定するべく第２フランジ部から突出すると共に第１フランジ部に対向する内側リブ及び外側リブを含み、第１凸条溶着部及び第２凸条溶着部の一方は、第１凸条溶着部及び第２凸条溶着部の他方よりも溶着幅が狭い基準幅溶着部と、基準幅溶着部よりも幅を拡げて形成された拡幅溶着部を含む、構成となっている。 The intake manifold of the present invention is an intake manifold formed by vibration welding of a first resin molded body and a second resin molded body in order to define a surge tank and a plurality of branch pipes, and the first resin molded body is a first resin molded body. The second resin molded body includes a first flange portion and a first convex welded portion protruding from the first flange portion, and the second resin molded body protrudes from the second flange portion and the second flange portion facing the first flange portion. The second ridge welded part to be joined to the one ridge welded part and the first flange part are projected from the second flange part in order to define the burr accumulation space inside and outside of the second ridge welded part, respectively. A reference in which one of the first ridge welded portion and the second ridge welded portion has a narrower welding width than the other of the first ridge welded portion and the second ridge welded portion. The structure includes a width welded portion and a widened welded portion formed to be wider than the reference width welded portion.
　上記インテークマニホールドにおいて、拡幅溶着部は、振動溶着の振動方向において離散的に配列されている、構成を採用してもよい。 In the intake manifold, the widening welded portions may be arranged discretely in the vibration direction of the vibration weld.
　上記インテークマニホールドにおいて、第１凸条溶着部及び第２凸条溶着部は、振動溶着の振動方向に伸長する伸長溶着領域と、第１フランジ部と第２フランジ部とが対向する対向方向に凸状に湾曲する湾曲溶着領域を含み、拡幅溶着部は伸長溶着領域に設けられている、構成を採用してもよい。 In the intake manifold, the first ridge welded portion and the second ridge welded portion are convex in the opposite direction in which the extension welding region extending in the vibration direction of the vibration welding and the first flange portion and the second flange portion face each other. A configuration may be adopted in which a curved welding region that is curved in a shape is included and a widening welding portion is provided in an extension welding region.
　上記インテークマニホールドにおいて、第２凸条溶着部は、基準幅溶着部及び拡幅溶着部を含み、第２凸条溶着部の拡幅溶着部の溶着幅寸法は、第１凸条溶着部の溶着幅寸法以下に形成されている、構成を採用してもよい。 In the intake manifold, the second convex welded portion includes the reference width welded portion and the widened welded portion, and the welded width dimension of the widened welded portion of the second convex welded portion is the welded width dimension of the first convex welded portion. The configuration formed below may be adopted.
　上記インテークマニホールドにおいて、拡幅溶着部における溶融代の占める断面積は、バリ溜め空間の断面積の０．７５～１倍に設定されている、構成を採用してもよい。 In the intake manifold, a configuration may be adopted in which the cross-sectional area occupied by the melting allowance in the widened welded portion is set to 0.75 to 1 times the cross-sectional area of the burr storage space.
　上記インテークマニホールドにおいて、拡幅溶着部は、分岐管が配置される領域に設けられている、構成を採用してもよい。 In the intake manifold, the widening welded portion may adopt a configuration provided in the area where the branch pipe is arranged.
　上記インテークマニホールドにおいて、第１樹脂成形体は、複数の分岐管と、複数の分岐管に連続してサージタンクの一部を画定する第１外壁部と、上記第１フランジ部と、上記第１凸条溶着部を含み、第２樹脂成形体は、第１外壁部と協働してサージタンクを画定する第２外壁部と、上記第２フランジ部と、上記第２凸条溶着部と、上記内側リブ及び外側リブを含む、構成を採用してもよい。 In the intake manifold, the first resin molded body includes a plurality of branch pipes, a first outer wall portion that continuously defines a part of a surge tank in the plurality of branch pipes, the first flange portion, and the first. The second resin molded body includes a ridge welded portion, and the second resin molded body includes a second outer wall portion that defines a surge tank in cooperation with the first outer wall portion, the second flange portion, and the second ridge welded portion. A configuration may be adopted that includes the inner rib and the outer rib.
　上記構成をなすインテークマニホールドによれば、大型化、複雑化等を招くことなく、振動溶着により生じるバリのはみ出しを防止して、耐圧強度、機械的強度等を高めることができる。 According to the intake manifold having the above configuration, it is possible to prevent the burrs from protruding due to vibration welding and to increase the pressure resistance strength, the mechanical strength, etc., without causing the increase in size and complexity.
本発明のインテークマニホールドを示すものであり、スロットル装置を取り付ける上流側フランジ部の側から視た外観斜視図である。The intake manifold of the present invention is shown, and is an external perspective view seen from the side of the upstream flange portion to which the throttle device is attached. 図１に示すインテークマニホールドを構成する第１樹脂成形体と第２樹脂成形体とが溶着される前の状態を示す分解斜視図である。FIG. 5 is an exploded perspective view showing a state before the first resin molded body and the second resin molded body constituting the intake manifold shown in FIG. 1 are welded. インテークマニホールドを構成する第１樹脂成形体を示す斜視図である。It is a perspective view which shows the 1st resin molded body which constitutes an intake manifold. インテークマニホールドを構成する第２樹脂成形体を示す斜視図である。It is a perspective view which shows the 2nd resin molded body which constitutes an intake manifold. 第２樹脂成形体の第２フランジ部を正面から視た正面図である。It is a front view which looked at the 2nd flange part of the 2nd resin molded body from the front. 図１に示すインテークマニホールドにおいて、第１樹脂成形体の第１凸条溶着部と、第２樹脂成形体の基準幅溶着部の領域における第２凸条溶着部との溶着状態を示す断面図である。In the intake manifold shown in FIG. 1, a cross-sectional view showing a welded state between a first convex welded portion of a first resin molded body and a second convex welded portion in a region of a reference width welded portion of a second resin molded body. be. 図１に示すインテークマニホールドにおいて、第１樹脂成形体の第１凸条溶着部と、第２樹脂成形体の拡幅溶着部の領域における第２凸条溶着部との溶着状態を示す断面図である。In the intake manifold shown in FIG. 1, it is a cross-sectional view showing a welded state between a first convex welded portion of a first resin molded body and a second convex welded portion in a region of a widened welded portion of a second resin molded body. .. 第１樹脂成形体の第１フランジ部と第２樹脂成形体の第２フランジ部との湾曲領域における溶着状態を示す斜視断面図である。It is a perspective cross-sectional view which shows the welding state in the curved region of the 1st flange part of the 1st resin molded part and the 2nd flange part of a 2nd resin molded body. 第１樹脂成形体の第１凸条溶着部と第２樹脂成形体の第２凸条溶着部との溶着において、第２凸条溶着部（基準幅溶着部）の溶融代を説明する模式図である。Schematic diagram illustrating the melting allowance of the second ridge welded portion (reference width welded portion) in the welding of the first ridge welded portion of the first resin molded body and the second ridge welded portion of the second resin molded body. Is. 第１樹脂成形体の第１凸条溶着部と第２樹脂成形体の第２凸条溶着部との溶着において、第２凸条溶着部（拡幅溶着部）の溶融代を説明する模式図である。It is a schematic diagram explaining the fusion allowance of the second ridge welded part (widening welded part) in the welding of the first ridge welded part of the first resin molded body and the second ridge welded part of the second resin molded body. be. 第２樹脂成形体の第２凸条溶着部において部分的に設けられた拡幅溶着部の溶融により発生したバリの流れを説明する模式図である。It is a schematic diagram explaining the flow of the burr generated by the melting of the widening welding part partially provided in the 2nd convex welded part of the 2nd resin molded body. 本発明に係る拡幅溶着部の他の実施形態を示す模式図である。It is a schematic diagram which shows the other embodiment of the wide welding part which concerns on this invention. 本発明に係る拡幅溶着部のさらに他の実施形態を示す模式図である。It is a schematic diagram which shows still another embodiment of the wide welding part which concerns on this invention.
　以下、本発明の実施の形態について、添付図面を参照しつつ説明する。
　本発明に係るインテークマニホールドは、樹脂材料を用いて形成され、エンジンの吸気系において吸気ダクトの下流に位置するスロットル装置とエンジンのシリンダヘッドとの間に配置されるものである。
　一実施形態に係るインテークマニホールドＭは、図１及び図２に示すように、サージタンクＴ及び複数の分岐管１１を画定するべく、第１樹脂成形体１０と第２樹脂成形体２０とを振動溶着により一体的に接合して形成されている。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
The intake manifold according to the present invention is formed by using a resin material and is arranged between a throttle device located downstream of an intake duct in the intake system of an engine and a cylinder head of the engine.
As shown in FIGS. 1 and 2, the intake manifold M according to the embodiment vibrates the first resin molded body 10 and the second resin molded body 20 in order to define the surge tank T and the plurality of branch pipes 11. It is formed by integrally joining by welding.
　第１樹脂成形体１０は、熱可塑性樹脂材料を用いて予め金型により成形されたものであり、図１ないし図３に示すように、軸線Ｌ方向に長尺に形成され、３つの分岐管１１、第１外壁部１２、上流側フランジ部１３、第１フランジ部１４、第１凸条溶着部１５を備えている。 The first resin molded body 10 is previously molded by a mold using a thermoplastic resin material, and is formed long in the axis L direction as shown in FIGS. 1 to 3, and has three branch pipes. 11. The first outer wall portion 12, the upstream flange portion 13, the first flange portion 14, and the first ridge welded portion 15 are provided.
　３つの分岐管１１は、シリンダヘッドに連結されるフランジ部が省略された状態でその一部が図示されており、軸線Ｌ方向に配列されて形成され、シリンダヘッドの吸気ポートに連通するように配置されるものである。
　第１外壁部１２は、３つの分岐管１１に連続すると共に略円筒状をなすサージタンクＴの一部を画定する半円筒状に形成されている。
　上流側フランジ部１３は、サージタンクＴの上流側において円形の入口１３ａを画定すると共に、スロットル装置を接合する接合面１３ｂ、締結ネジを捩じ込む４つのネジ穴１３ｃを備えている。 A part of the three branch pipes 11 is shown in a state where the flange portion connected to the cylinder head is omitted, and the three branch pipes 11 are formed so as to be arranged in the L direction of the axis so as to communicate with the intake port of the cylinder head. It is to be placed.
The first outer wall portion 12 is formed in a semi-cylindrical shape that is continuous with the three branch pipes 11 and defines a part of a substantially cylindrical surge tank T.
The upstream flange portion 13 defines a circular inlet 13a on the upstream side of the surge tank T, and includes a joint surface 13b for joining the throttle device and four screw holes 13c for screwing the fastening screw.
　第１フランジ部１４は、図３に示すように、環状に形成され、振動溶着時の振動方向Ｖｄと平行な軸線Ｌ方向に伸長する二つの伸長領域１４ａ，１４ａ、二つの伸長領域１４ａ，１４ａを連結するＵターン領域１４ｂ、上流側フランジ部１３の接合面１３ｂと反対側の面に隣接する湾曲領域１４ｃ、二つの伸長領域１４ａ，１４ａと湾曲領域１４ｃとを連結する二つの屈曲領域１４ｄ，１４ｄを備えている。 As shown in FIG. 3, the first flange portion 14 is formed in an annular shape, and has two extension regions 14a and 14a and two extension regions 14a and 14a extending in the axis L direction parallel to the vibration direction Vd during vibration welding. A U-turn region 14b connecting the two extending regions 14b, a curved region 14c adjacent to the surface opposite to the joint surface 13b of the upstream flange portion 13, and two bending regions 14d connecting the two extension regions 14a and 14a and the curved region 14c, It has 14d.
　二つの伸長領域１４ａ，１４ａは、互いに平行に軸線Ｌ方向に伸長している。
　そして、二つの伸長領域１４ａ，１４ａ、Ｕターン領域１４ｂ、及び二つの屈曲領域１４ｄ，１４ｄは、軸線Ｌを含む平面と平行な同一面上に位置する平坦面Ｐ１として形成されている。
　一方、湾曲領域１４ｃは、第２樹脂成形体２０の第２フランジ部２４と対向する対向方向Ｆｄにおいて第２フランジ部２４に向けて凸状に湾曲する、すなわち、平坦面Ｐ１から対向方向Ｆｄに略半円の凸状に突出し、かつ、振動方向Ｖｄと平行な凸状湾曲面Ｃ１として形成されている。 The two extension regions 14a and 14a extend in the L direction along the axis parallel to each other.
The two extension regions 14a and 14a, the U-turn region 14b, and the two bending regions 14d and 14d are formed as flat surfaces P1 located on the same plane parallel to the plane including the axis L.
On the other hand, the curved region 14c is convexly curved toward the second flange portion 24 in the facing direction Fd facing the second flange portion 24 of the second resin molded body 20, that is, from the flat surface P1 to the facing direction Fd. It is formed as a convex curved surface C1 that protrudes in a substantially semicircular convex shape and is parallel to the vibration direction Vd.
　第１凸条溶着部１５は、第２樹脂成形体２０の第２凸条溶着部２５と振動溶着により溶着されるものであり、図３に示すように、第１フランジ部１４の平坦面Ｐ１及び凸状湾曲面Ｃ１から対向方向Ｆｄにおいて突出するように形成されている。
　そして、第１凸条溶着部１５は、二つの伸長溶着領域１５ａ，１５ａ、Ｕターン溶着領域１５ｂ、湾曲溶着領域１５ｃ、二つの屈曲溶着領域１５ｄ，１５ｄを備えている。 The first ridge welded portion 15 is welded to the second ridge welded portion 25 of the second resin molded body 20 by vibration welding, and as shown in FIG. 3, the flat surface P1 of the first flange portion 14 It is formed so as to protrude from the convex curved surface C1 in the facing direction Fd.
The first ridge welding portion 15 includes two extension welding regions 15a and 15a, a U-turn welding region 15b, a curved welding region 15c, and two bending welding regions 15d and 15d.
　二つの伸長溶着領域１５ａ，１５ａは、第１フランジ部１４の二つの伸長領域１４ａ，１４ａに形成され、図６及び図７に示すように、軸線Ｌに垂直な断面において溶着後の寸法として突出高さＨ１及び溶着幅Ｗ１の矩形状断面をなす。
　Ｕターン溶着領域１５ｂは、第１フランジ部１４のＵターン領域１４ｂに形成され、二つの伸長溶着領域１５ａ，１５ａと同様に、溶着後の寸法として突出高さＨ１及び溶着幅Ｗ１の矩形状断面をなす。
　湾曲溶着領域１５ｃは、第１フランジ部１４の湾曲領域１４ｃに形成され、溶着後の寸法として突出高さＨ１及び溶着幅Ｗ１の矩形状断面をなす。尚、湾曲溶着領域１５ｃの溶着幅は、溶着幅Ｗ１よりも狭く形成されてもよい。
　二つの屈曲溶着領域１５ｄ，１５ｄは、第１フランジ部１４の屈曲領域１４ｄ，１４ｄに形成され、溶着後の寸法として突出高さＨ１及び溶着幅Ｗ１の矩形状断面をなす。尚、屈曲溶着領域１５ｄの溶着幅は、溶着幅Ｗ１よりも狭く形成されてもよい。 The two extension welding regions 15a and 15a are formed in the two extension regions 14a and 14a of the first flange portion 14, and as shown in FIGS. 6 and 7, project as the dimensions after welding in the cross section perpendicular to the axis L. It has a rectangular cross section with a height H1 and a welding width W1.
The U-turn welding region 15b is formed in the U-turn region 14b of the first flange portion 14, and has a rectangular cross section having a protruding height H1 and a welding width W1 as dimensions after welding, similarly to the two extended welding regions 15a and 15a. Make.
The curved welding region 15c is formed in the curved region 14c of the first flange portion 14, and has a rectangular cross section having a protruding height H1 and a welding width W1 as dimensions after welding. The welding width of the curved welding region 15c may be formed narrower than the welding width W1.
The two bent welding regions 15d and 15d are formed in the bent regions 14d and 14d of the first flange portion 14, and form a rectangular cross section having a protruding height H1 and a welding width W1 as the dimensions after welding. The welding width of the bent welding region 15d may be formed narrower than the welding width W1.
　第２樹脂成形体２０は、熱可塑性樹脂材料を用いて予め金型により成形されたものであり、図１、図２、図４、図５に示すように、軸線Ｌ方向に長尺に形成され、第２外壁部２２、第２フランジ部２４、第２凸条溶着部２５、内側リブ２６、外側リブ２７を備えている。 The second resin molded body 20 is previously molded by a mold using a thermoplastic resin material, and is formed long in the axis L direction as shown in FIGS. 1, 2, 4, and 5. The second outer wall portion 22, the second flange portion 24, the second convex welded portion 25, the inner rib 26, and the outer rib 27 are provided.
　第２外壁部２２は、略円筒状をなすサージタンクＴの一部を画定する半円筒状に形成されている。
　第２フランジ部２４は、図４に示すように、環状に形成され、振動溶着時の振動方向Ｖｄと平行な軸線Ｌ方向に伸長する二つの伸長領域２４ａ，２４ａ、二つの伸長領域２４ａ，２４ａを連結するＵターン領域２４ｂ、湾曲領域２４ｃ、二つの伸長領域２４ａ，２４ａと湾曲領域２４ｃとを連結する二つの屈曲領域２４ｄ，２４ｄを備えている。 The second outer wall portion 22 is formed in a semi-cylindrical shape that defines a part of the surge tank T that has a substantially cylindrical shape.
As shown in FIG. 4, the second flange portion 24 is formed in an annular shape, and has two extension regions 24a and 24a and two extension regions 24a and 24a extending in the axis L direction parallel to the vibration direction Vd during vibration welding. It is provided with a U-turn region 24b, a curved region 24c, and two bent regions 24d, 24d connecting the two extended regions 24a, 24a and the curved region 24c.
　二つの伸長領域２４ａ，２４ａは、互いに平行に軸線Ｌ方向に伸長している。
　そして、二つの伸長領域２４ａ，２４ａ、Ｕターン領域２４ｂ、及び二つの屈曲領域２４ｄ，２４ｄは、軸線Ｌを含む平面と平行な同一面上に位置する平坦面Ｐ２として形成されている。
　一方、湾曲領域２４ｃは、第１樹脂成形体１０の第１フランジ部１４と対向する対向方向Ｆｄにおいて第１フランジ部１４に向けて凹状に湾曲する、すなわち、平坦面Ｐ２から対向方向Ｆｄに略半円の凹状に凹み、かつ、振動方向Ｖｄと平行な凹状湾曲面Ｃ２として形成されている。 The two extension regions 24a and 24a extend in the L direction along the axis parallel to each other.
The two extension regions 24a and 24a, the U-turn region 24b, and the two bending regions 24d and 24d are formed as flat surfaces P2 located on the same plane parallel to the plane including the axis L.
On the other hand, the curved region 24c is concavely curved toward the first flange portion 14 in the facing direction Fd facing the first flange portion 14 of the first resin molded body 10, that is, substantially from the flat surface P2 to the facing direction Fd. It is formed as a concave curved surface C2 that is recessed in a semicircular shape and is parallel to the vibration direction Vd.
　第２凸条溶着部２５は、第１樹脂成形体１０の第１凸条溶着部１５と振動溶着により溶着されるものであり、図４に示すように、第２フランジ部２４の平坦面Ｐ２及び凹状湾曲面Ｃ２から対向方向Ｆｄに突出するように形成されている。
　そして、第２凸条溶着部２５は、図５に示すように、二つの伸長溶着領域２５ａ，２５ａ、Ｕターン溶着領域２５ｂ、湾曲溶着領域２５ｃ、二つの屈曲溶着領域２５ｄ，２５ｄを備えている。 The second ridge welded portion 25 is welded to the first ridge welded portion 15 of the first resin molded body 10 by vibration welding, and as shown in FIG. 4, the flat surface P2 of the second flange portion 24 It is formed so as to project from the concave curved surface C2 in the opposite direction Fd.
As shown in FIG. 5, the second ridge welding portion 25 includes two extension welding regions 25a and 25a, a U-turn welding region 25b, a curved welding region 25c, and two bending welding regions 25d and 25d. ..
　一方の伸長溶着領域２５ａは、図４及び図５に示すように、第２フランジ部２４の一方の伸長領域２４ａに形成され、図６及び図７に示すように、軸線Ｌに垂直な断面において溶着後の寸法として突出高さＨ２及び溶着幅Ｗ２の矩形状断面をなす基準幅溶着部２５ａ１と、軸線Ｌに垂直な断面において溶着後の寸法として高さＨ２及び溶着幅Ｗ２wの矩形状断面をなす拡幅溶着部２５ａ２を含むように形成されている。 One extension welding region 25a is formed in one extension region 24a of the second flange portion 24 as shown in FIGS. 4 and 5, and is formed in a cross section perpendicular to the axis L as shown in FIGS. 6 and 7. As the dimensions after welding, the reference width welding portion 25a 1 forming a rectangular cross section of the protruding height H2 and the welding width W2, and the rectangular cross section of the height H2 and the welding width W2w as the dimensions after welding in the cross section perpendicular to the axis L. It is formed so as to include the widened welded portion 25a 2 forming the above.
　拡幅溶着部２５ａ２は、対向方向Ｆｄから視て、軸線Ｌ方向に所定長さで角Ｒが設けられた略直方体の形状をなし、振動溶着の振動方向Ｖｄに離散的に配置されている。
　ここでは、３つの拡幅溶着部２５ａ２が、軸線Ｌ方向において等間隔で離れて配置されると共に、分岐管１１が配置されている領域に配置されている。
　また、拡幅溶着部２５ａ２の溶着幅Ｗ２wは、基準幅溶着部２５ａ１の溶着幅Ｗ２よりも幅を拡げて形成されている。ここでは、溶着幅Ｗ２wの寸法は、第１凸条溶着部１５の伸長溶着領域１５ａの溶着幅Ｗ１の寸法と同一に形成されている。
　尚、溶着幅Ｗ２wは、溶着幅Ｗ２よりも大きく、溶着幅Ｗ１以下の範囲で適宜選定される。 The widened welded portions 25a 2 have a substantially rectangular parallelepiped shape having an angle R having a predetermined length in the axis L direction when viewed from the facing direction Fd, and are discretely arranged in the vibration direction Vd of the vibration welding.
Here, the three widening welded portions 25a 2 are arranged at equal intervals in the axis L direction and are arranged in the region where the branch pipe 11 is arranged.
Further, the welding width W2w of the widened welding portion 25a 2 is formed to be wider than the welding width W2 of the reference width welding portion 25a 1. Here, the dimension of the welding width W2w is formed to be the same as the dimension of the welding width W1 of the extended welding region 15a of the first convex welding portion 15.
The welding width W2w is appropriately selected within a range larger than the welding width W2 and equal to or less than the welding width W1.
　他方の伸長溶着領域２５ａは、第２フランジ部２４の他方の伸長領域２４ａに形成され、図６及び図７に示すように、軸線Ｌに垂直な断面において溶着後の寸法として突出高さＨ２及び溶着幅Ｗ２の矩形状断面をなす。
　すなわち、他方の伸長溶着領域２５ａは、基準幅溶着部２５ａ１だけであり、拡幅溶着部２５ａ２を含んでいないが、一方の伸長溶着領域２５ａと同様に拡幅溶着部２５ａ２を含む形態であってもよい。 The other extension welding region 25a is formed in the other extension region 24a of the second flange portion 24, and as shown in FIGS. 6 and 7, the protrusion height H2 and the protrusion height H2 and the dimensions after welding are the dimensions after welding in the cross section perpendicular to the axis L. It has a rectangular cross section with a welding width W2.
That is, the other extended weld region 25a is only reference width welded portion 25a 1, but does not include a widening weld portion 25a 2, a form including the widening welded portion 25a 2 like the one elongated weld region 25a You may.
　Ｕターン溶着領域２５ｂは、第２フランジ部２４のＵターン領域２４ｂに形成され、二つの伸長溶着領域２５ａ，２５ａの基準幅溶着部２５ａ１と同様に、溶着後の寸法として突出高さＨ２及び溶着幅Ｗ２の矩形状断面をなす。
　湾曲溶着領域２５ｃは、第２フランジ部２４の湾曲領域２４ｃに形成され、溶着後の寸法として突出高さＨ２及び溶着幅Ｗ２の矩形状断面をなす。尚、湾曲溶着領域２５ｃの溶着幅は、溶着幅Ｗ２よりも狭く形成されてもよい。
　二つの屈曲溶着領域２５ｄ，２５ｄは、第２フランジ部２４の屈曲領域２４ｄ，２４ｄに形成され、溶着後の寸法として突出高さＨ２及び溶着幅Ｗ２の矩形状断面をなす。尚、屈曲溶着領域２５ｄの溶着幅は、溶着幅Ｗ２よりも狭く形成されてもよい。 The U-turn welding region 25b is formed in the U-turn region 24b of the second flange portion 24, and has the protrusion height H2 and the protrusion height H2 as the dimensions after welding as the reference width welding portion 25a 1 of the two extension welding regions 25a and 25a. It has a rectangular cross section with a welding width W2.
The curved welding region 25c is formed in the curved region 24c of the second flange portion 24, and has a rectangular cross section having a protruding height H2 and a welding width W2 as dimensions after welding. The welding width of the curved welding region 25c may be formed narrower than the welding width W2.
The two bent welding regions 25d and 25d are formed in the bent regions 24d and 24d of the second flange portion 24, and form a rectangular cross section having a protruding height H2 and a welding width W2 as the dimensions after welding. The welding width of the bent welding region 25d may be formed narrower than the welding width W2.
　内側リブ２６は、図６及び図７に示すように、第２凸条溶着部２５と距離Ｄを隔てて第２フランジ部２４から対向方向Ｆｄに略環状に突出する薄肉片として形成され、第２凸条溶着部２５と協働して内側のバリ溜め空間Ｓｉを画定し、その内壁面がサージタンクＴの内壁面の一部を画定する。
　ここでは、図８に示すように、第２フランジ部２４の湾曲領域２４ｃにおいて、内側リブ２６が設けられていない。その理由としては、第２樹脂成形体２０の第２フランジ部２４において、湾曲領域２４ｃに十分な空間が画定されるため、この空間でバリを捕獲することができるからであり、又、振動溶着の際において、振動方向Ｖｄの振幅代を十分確保するためである。
　外側リブ２７は、図６及び図７に示すように、第２凸条溶着部２５と距離Ｄを隔てて第２フランジ部２４から対向方向Ｆｄに環状に突出する薄肉片として形成され、第２凸条溶着部２５と協働して外側のバリ溜め空間Ｓｏを画定し、その外壁面が外輪郭の一部を画定する。 As shown in FIGS. 6 and 7, the inner rib 26 is formed as a thin-walled piece that projects substantially annularly from the second flange portion 24 in the opposite direction Fd with a distance D from the second convex welded portion 25. 2 The burr accumulation space Si inside is defined in cooperation with the ridge welding portion 25, and the inner wall surface thereof defines a part of the inner wall surface of the surge tank T.
Here, as shown in FIG. 8, the inner rib 26 is not provided in the curved region 24c of the second flange portion 24. The reason is that in the second flange portion 24 of the second resin molded body 20, a sufficient space is defined in the curved region 24c, so that burrs can be captured in this space, and vibration welding is also possible. This is to ensure a sufficient amplitude allowance in the vibration direction Vd.
As shown in FIGS. 6 and 7, the outer rib 27 is formed as a thin-walled piece that annularly protrudes from the second flange portion 24 in the opposite direction Fd with a distance D from the second convex welded portion 25. The outer burr storage space So is defined in cooperation with the ridge welding portion 25, and the outer wall surface of the outer wall surface defines a part of the outer contour.
　そして、内側リブ２６及び外側リブ２７の端面は、第１樹脂成形体１０と第２樹脂成形体２０とが振動溶着により一体的に接合された状態で、第１樹脂成形体１０の第１フランジ部１４に密接して対向する。
　これにより、バリ溜め空間Ｓｉ，Ｓｏが略閉塞された空間となり、振動溶着により生じたバリがバリ溜め空間ＳｉからサージタンクＴの内部へはみ出すのを防止でき、又、バリ溜め空間Ｓｏから外部へはみ出すのを防止できる。 The end faces of the inner rib 26 and the outer rib 27 are the first flange of the first resin molded body 10 in a state where the first resin molded body 10 and the second resin molded body 20 are integrally joined by vibration welding. Closely opposed to the portion 14.
As a result, the burr storage spaces Si and So are substantially closed, and it is possible to prevent burrs generated by vibration welding from protruding from the burr storage space Si into the surge tank T, and from the burr storage space So to the outside. It can be prevented from sticking out.
　また、第２凸条溶着部２５の溶融代とバリ溜め空間Ｓｉ，Ｓｏとの関係は、図９及び図１０に示すように、軸線Ｌに垂直な断面において、バリ溜め空間Ｓｉ，Ｓｏの合計の断面積をＳｔとし、基準幅溶着部２５ａ１の溶融代の占める断面積をＳ１とし、拡幅溶着部２５ａ２の溶融代の示す断面積をＳ２とすると、Ｓ１：Ｓｔ＝１：２～２．５、Ｓ２：Ｓｔ＝１：１～１．５程度に設定されている。
　尚、拡幅溶着部２５ａ２の領域における断面積Ｓｔは、基準幅溶着部２５ａ１の領域における断面積Ｓｔよりも僅かに狭くなるが、ここでは、拡幅溶着部２５ａ２の領域における断面積Ｓｔを基準値として算出されている。
　すなわち、拡幅溶着部２５ａ２における溶融代の占める断面積Ｓ２は、バリ溜め空間Ｓｉ，Ｓｏの断面積Ｓｔの０．７５～１倍に設定されている。
　上記構成によれば、基準幅溶着部２５ａ１の溶融により生じたバリは、内側及び外側に隣接するバリ溜め空間Ｓｉ，Ｓｏに流れ込む。それ故に、基準幅溶着部２５ａ１の溶融により生じたバリのはみ出しを防止できる。
　また、拡幅溶着部２５ａ２の溶融により生じたバリは、内側及び外側に隣接するバリ溜め空間Ｓｉ，Ｓｏに流れ込むと共に基準幅溶着部２５ａ１の内側及び外側に隣接するバリ溜め空間Ｓｉ，Ｓｏに流れ込む。それ故に、拡幅溶着部２５ａ２の溶融により生じたバリのはみ出しを防止できる。 Further, as shown in FIGS. 9 and 10, the relationship between the melting allowance of the second convex welded portion 25 and the burr accumulation spaces Si and So is the total of the burr accumulation spaces Si and So in the cross section perpendicular to the axis L. Let S be the cross-sectional area of St, the cross-sectional area occupied by the melting allowance of the reference width welding portion 25a 1 be S1, and the cross-sectional area indicated by the melting allowance of the widened welding portion 25a 2 be S2. .5, S2: St = 1: 1 to 1.5.
The cross-sectional area St in the region of the widened welded portion 25a 2 is slightly narrower than the cross-sectional area St in the region of the reference width welded portion 25a 1 , but here, the cross-sectional area St in the region of the widened welded portion 25a 2 is used. It is calculated as a reference value.
That is, the cross-sectional area S2 occupied by the melting allowance in the widened welded portion 25a 2 is set to 0.75 to 1 times the cross-sectional area St of the burr accumulation spaces Si and So.
According to the above configuration, the burrs generated by the melting of the reference width welding portion 25a 1 flow into the burr storage spaces Si and So adjacent to the inside and the outside. Therefore, it is possible to prevent the burrs from protruding due to the melting of the reference width welding portion 25a 1.
Further, the burrs generated by the melting of the widened welding portion 25a 2 flow into the burr storage spaces Si and So adjacent to the inside and the outside, and also flow into the burr storage spaces Si and So adjacent to the inside and the outside of the reference width welding portion 25a 1. It flows in. Therefore, it is possible to prevent the burrs from protruding due to the melting of the widened welded portion 25a 2.
　上記構成においては、複数の拡幅溶着部２５ａ２が振動溶着の際の振動方向Ｖｄにおいて離散的に配置されているため、拡幅溶着部２５ａ２の溶融により生じたバリを振動方向Ｖｄに移動させて、拡幅溶着部２５ａ２同士の間に位置する基準幅溶着部２５ａ１の周りに画定されるバリ溜め空間Ｓｉ，Ｓｏに積極的に導くことができる。
　これにより、第１フランジ部１４及び第２フランジ部２４の拡幅化や大型化を招くことなく、基準幅溶着部２５ａ１の周りに画定されるバリ溜め空間Ｓｉ，Ｓｏを拡幅溶着部２５ａ２の溶融により生じたバリの逃げ空間として有効に利用することができ、耐圧強度及び機械的強度を高めることができると共にバリのはみ出しを防止できる。 In the above configuration, since the plurality of widening welding portions 25a 2 are discretely arranged in the vibration direction Vd at the time of vibration welding, the burrs generated by the melting of the widening welding portions 25a 2 are moved in the vibration direction Vd. , It can be positively guided to the burr storage spaces Si and So defined around the reference width welding portion 25a 1 located between the widening welding portions 25a 2.
As a result, the burr accumulation spaces Si and So defined around the reference width welding portion 25a 1 can be widened and welded in the widening welding portion 25a 2 without causing the first flange portion 14 and the second flange portion 24 to be widened or enlarged. It can be effectively used as an escape space for burrs generated by melting, and it is possible to increase the pressure resistance and mechanical strength and prevent the burrs from sticking out.
　次に、上記インテークマニホールドＭの振動溶着について説明する。
　先ず、第１樹脂成形体１０が下側治具に固定され、第２樹脂成形体２０が上側治具に固定される。
　続いて、下側治具を介して、第１樹脂成形体１０の第１凸条溶着部１５が第２樹脂成形体２０の第２凸条溶着部２５に当接するように圧力が加えられる。
　続いて、上側治具を介して、第２樹脂成形体２０が第２樹脂成形体２０に対して振動方向Ｖｄに往復振動させられて、振動溶着が施される。
　この振動溶着において、振動周波数は２００Ｈｚ～２５０Ｈｚであり、振幅は０．５ｍｍ～２．０ｍｍの範囲である。ここでは、第１凸条溶着部１５と第２凸条溶着部２５の接触面に摩擦熱を発生させて、第２凸条溶着部２５を積極的に溶融させて溶着させる。 Next, the vibration welding of the intake manifold M will be described.
First, the first resin molded body 10 is fixed to the lower jig, and the second resin molded body 20 is fixed to the upper jig.
Subsequently, pressure is applied so that the first ridge welded portion 15 of the first resin molded body 10 comes into contact with the second ridge welded portion 25 of the second resin molded body 20 via the lower jig.
Subsequently, the second resin molded body 20 is reciprocally vibrated with respect to the second resin molded body 20 in the vibration direction Vd via the upper jig, and vibration welding is performed.
In this vibration welding, the vibration frequency is 200 Hz to 250 Hz, and the amplitude is in the range of 0.5 mm to 2.0 mm. Here, frictional heat is generated on the contact surface between the first ridge welding portion 15 and the second ridge welding portion 25, and the second ridge welding portion 25 is positively melted and welded.
　ここでは、上流側フランジ部１３及び３つの分岐管１１を一体的に備える比較的に重量の第１樹脂成形体１０を静的に保持し、半円筒状の比較的に軽量の第２樹脂成形体２０を往復振動させるため、振動溶着を効率良く施すことができる。
　また、振動溶着の振動方向Ｖｄは、インテークマニホールドＭのサージタンクＴを画定する第１外壁部１２及び第２外壁部２２の軸線Ｌ方向、すなわち、第１凸条溶着部１５及び第２凸条溶着部２５の伸長領域１５ａ、２５ａに沿う方向であるため、対向方向Ｆｄに凸状に湾曲する湾曲溶着領域１５ｃ、２５ｃを含むにも拘わらず、振動溶着を施すことができる。 Here, the relatively heavy first resin molded body 10 integrally including the upstream flange portion 13 and the three branch pipes 11 is statically held, and the semi-cylindrical relatively lightweight second resin molded body is molded. Since the body 20 is reciprocally vibrated, vibration welding can be efficiently performed.
Further, the vibration direction Vd of the vibration welding is the axis L direction of the first outer wall portion 12 and the second outer wall portion 22 defining the surge tank T of the intake manifold M, that is, the first convex welded portion 15 and the second convex. Since the direction is along the extension regions 15a and 25a of the welding portion 25, vibration welding can be performed even though the curved welding regions 15c and 25c that are convexly curved in the opposite direction Fd are included.
　また、複数の拡幅溶着部２５ａ２は、振動方向Ｖｄに離散的に配置されているため、図１１に示すように、拡幅溶着部２５ａ２の溶融により生じたバリＢを、基準幅溶着部２５ａ１の内側及び外側に隣接するバリ溜め空間Ｓｉ，Ｓｏに積極的に導くことができる。
　これにより、基準幅溶着部２５ａ１の溶着幅Ｗ２よりも幅広い溶着幅Ｗ２ｗをなす拡幅溶着部２５ａ２を設けても、発生したバリＢがバリ溜め空間Ｓｉ，Ｓｏの外側にはみ出すのを防止することができる。
　また、拡幅溶着部２５ａ２を設けたことにより、第１樹脂成形体１０及び第２樹脂成形体２０の幅寸法の増加や全体の大型化を招くことなく、インテークマニホールドＭの耐圧強度、機械的強度を高めることができる。 Further, a plurality of widening the welding portion 25a 2, because they are discretely arranged in the vibration direction Vd, as shown in FIG. 11, the burr B caused by the melting of the widening weld portion 25a 2, the reference width weld portion 25a It can be positively guided to the burr storage spaces Si and So adjacent to the inside and the outside of 1.
As a result, even if the widened welding portion 25a 2 having a welding width W2w wider than the welding width W2 of the reference width welding portion 25a 1 is provided, the generated burr B is prevented from protruding to the outside of the burr storage spaces Si and So. be able to.
Further, by providing the widening welded portion 25a 2 , the pressure resistance strength and mechanical resistance of the intake manifold M are not increased without increasing the width dimension of the first resin molded body 10 and the second resin molded body 20 and increasing the overall size. The strength can be increased.
　図１２は、本発明に係る第２凸条溶着部の他の実施形態を示すものである。
この実施形態に係る第２凸条溶着部１２５は、前述の第２凸条溶着部２５の拡幅溶着部２５ａ２の形状に比べて、長さ寸法が短くなった直方体又は立方体の形状をなす拡幅溶着部１２５ａ２を採用するものである。
　この実施形態よれば、拡幅溶着部１２５ａ２の溶融により生じたバリＢが、基準幅溶着部２５ａ１の内側及び外側に隣接するバリ溜め空間Ｓｉ，Ｓｏに辿り着くまでの距離が短くなるため、拡幅溶着部１２５ａ２の溶融により生じたバリＢを、基準幅溶着部２５ａ１の内側及び外側に隣接するバリ溜め空間Ｓｉ，Ｓｏに容易に導くことができる。
　これにより、基準幅溶着部２５ａ１の溶着幅Ｗ２よりも幅広い溶着幅Ｗ２ｗをなす拡幅溶着部１２５ａ２を設けても、発生したバリＢがバリ溜め空間Ｓｉ，Ｓｏの外側にはみ出すのを防止することができる。
　また、拡幅溶着部１２５ａ２を設けたことにより、第１樹脂成形体１０及び第２樹脂成形体２０の幅寸法の増加や全体の大型化を招くことなく、インテークマニホールドＭの耐圧強度、機械的強度を高めることができる。 FIG. 12 shows another embodiment of the second ridge welded portion according to the present invention.
The second convex welded portion 125 according to this embodiment has a widened shape in the shape of a rectangular parallelepiped or a cube whose length is shorter than the shape of the widened welded portion 25a 2 of the second convex welded portion 25 described above. The welded portion 125a 2 is adopted.
According to this embodiment, the distance until the burr B generated by the melting of the widening welded portion 125a 2 reaches the burr storage spaces Si and So adjacent to the inside and the outside of the reference width welding portion 25a 1 is shortened. The burrs B generated by melting the widened welded portion 125a 2 can be easily guided to the burr storage spaces Si and So adjacent to the inside and outside of the reference width welded portion 25a 1.
As a result, even if the widened welding portion 125a 2 having a welding width W2w wider than the welding width W2 of the reference width welding portion 25a 1 is provided, the generated burr B is prevented from protruding to the outside of the burr storage spaces Si and So. be able to.
Further, by providing the widening welded portion 125a 2 , the pressure resistance strength and mechanical resistance of the intake manifold M are not increased without increasing the width dimension of the first resin molded body 10 and the second resin molded body 20 and increasing the overall size. The strength can be increased.
　図１３は、本発明に係る第２凸条溶着部のさらに他の実施形態を示すものである。
この実施形態に係る第２凸条溶着部２２５は、前述の第２凸条溶着部２５の拡幅溶着部２５ａ２の形状に比べて、長さ寸法が短くなってかつ丸みを帯びた楕円又は円形状をなす拡幅溶着部２２５ａ２を採用するものである。
　この実施形態よれば、拡幅溶着部２２５ａ２の溶融により生じたバリＢが、基準幅溶着部２５ａ１の内側及び外側に隣接するバリ溜め空間Ｓｉ，Ｓｏに流れ込み易くなるため、拡幅溶着部２２５ａ２の溶融により生じたバリＢを、基準幅溶着部２５ａ１の内側及び外側に隣接するバリ溜め空間Ｓｉ，Ｓｏに容易に導くことができる。
　これにより、基準幅溶着部２５ａ１の溶着幅Ｗ２よりも幅広い溶着幅Ｗ２ｗをなす拡幅溶着部２２５ａ２を設けても、発生したバリＢがバリ溜め空間Ｓｉ，Ｓｏの外側にはみ出すのを防止することができる。
　また、拡幅溶着部２２５ａ２を設けたことにより、第１樹脂成形体１０及び第２樹脂成形体２０の幅寸法の増加や全体の大型化を招くことなく、インテークマニホールドＭの耐圧強度、機械的強度を高めることができる。 FIG. 13 shows still another embodiment of the second ridge welded portion according to the present invention.
The second convex welded portion 225 according to this embodiment has an ellipse or a circle having a shorter length and a rounded shape than the shape of the widened welded portion 25a 2 of the second convex welded portion 25 described above. The widened welded portion 225a 2 having a shape is adopted.
According to this embodiment, since the burr B caused by the melting of the widening weld portion 225a 2 is burr reservoir space Si adjacent to the inner and outer reference width welded portion 25a 1, easily flow into So., widening the welding portion 225a 2 The burrs B generated by the melting of the burrs can be easily guided to the burrs storage spaces Si and So adjacent to the inside and the outside of the reference width welding portion 25a 1.
As a result, even if the widened welding portion 225a 2 having a welding width W2w wider than the welding width W2 of the reference width welding portion 25a 1 is provided, the generated burr B is prevented from protruding to the outside of the burr storage spaces Si and So. be able to.
Further, by providing the widening welded portion 225a 2 , the pressure resistance strength and mechanical resistance of the intake manifold M are not increased without increasing the width dimension of the first resin molded body 10 and the second resin molded body 20 and increasing the overall size. The strength can be increased.
　上記実施形態においては、拡幅溶着部２５ａ２が二つの伸長溶着領域２５ａ，２５ａのうち一方の伸長溶着領域２５ａに設けられた構成を示したが、これに限定されるものではない。例えば、二つの伸長溶着領域２５ａ，２５ａにそれぞれ複数の拡幅溶着部２５ａ２を設けてもよい。
　上記実施形態においては、分岐管１１が配置される領域に対応させて拡幅溶着部２５ａ２を設けた構成を示したが、これに限定されるものではなく、その他の領域に拡幅溶着部を設けてもよい。
　上記実施形態においては、拡幅溶着部２５ａ２の溶着幅Ｗ２ｗの寸法が第１凸条溶着部１５の溶着幅Ｗ１の寸法と同一の構成を示したが、これに限定されるものではなく、Ｗ２＜Ｗ２ｗ＜Ｗ１の範囲で適宜選択することができる。
　上記実施形態においては、第１凸条溶着部１５及び第２凸条溶着部２５の一方としての第２凸条溶着部２５に対して、基準幅溶着部２５ａ１及び拡幅溶着部２５ａ２を設けた構成を示したが、これに限定されるものではなく、第１凸条溶着部１５に対して、基準幅溶着部及び拡幅溶着部を設けた構成を採用してもよい。 In the above embodiment, the widening welded portion 25a 2 is provided in one of the two extended welding regions 25a and 25a, but the present invention is not limited to this. For example, a plurality of widening welding portions 25a 2 may be provided in each of the two extension welding regions 25a and 25a.
In the above embodiment, the configuration in which the widening welding portion 25a 2 is provided corresponding to the region where the branch pipe 11 is arranged is shown, but the present invention is not limited to this, and the widening welding portion is provided in other regions. You may.
In the above embodiment, the dimension of the welding width W2w of the widened welding portion 25a 2 shows the same configuration as the dimension of the welding width W1 of the first convex welded portion 15, but the present invention is not limited to this, and W2 It can be appropriately selected within the range of <W2w <W1.
In the above embodiment, the reference width welding portion 25a 1 and the widening welding portion 25a 2 are provided for the second ridge welding portion 25 as one of the first ridge welding portion 15 and the second ridge welding portion 25. However, the present invention is not limited to this, and a configuration in which a reference width welding portion and a widening welding portion are provided with respect to the first convex welded portion 15 may be adopted.
　以上述べたように、本発明のインテークマニホールドによれば、大型化、複雑化等を招くことなく、振動溶着により生じるバリのはみ出しを防止して、耐圧強度、機械的強度等を高めることができるため、自動車等に搭載されるエンジンの吸気系に適用できるのは勿論のこと、二輪車その他の車両に搭載されるエンジン又は単体として使用されるエンジンの吸気系においても有用である。 As described above, according to the intake manifold of the present invention, it is possible to prevent the burrs from protruding due to vibration welding and to increase the pressure resistance strength, the mechanical strength, etc., without causing an increase in size or complexity. Therefore, it is of course applicable to the intake system of an engine mounted on an automobile or the like, and is also useful in the intake system of an engine mounted on a two-wheeled vehicle or other vehicle or an engine used as a single unit.
Ｍ　インテークマニホールド
Ｔ　サージタンク
Ｖｄ　振動溶着の振動方向
Ｆｄ　対向方向
１０　第１樹脂成形体
１１　分岐管
１２　第１外壁部
１４　第１フランジ部
１５　第１凸条溶着部
１５ａ　伸長溶着領域
１５ｃ　湾曲溶着領域
２０　第２樹脂成形体
２２　第２外壁部
２４　第２フランジ部
２５　第２凸条溶着部
２５ａ　伸長溶着領域
２５ａ１　基準幅溶着部
２５ａ２　拡幅溶着部
２５ｃ　湾曲溶着領域
Ｓｉ，Ｓｏ　バリ溜め空間
２６　内側リブ
２７　外側リブ
Ｓ２　拡幅溶着部における溶融代の占める断面積
Ｓｔ　バリ溜め空間の断面積
Ｗ１　第１凸条溶着部の溶着幅
Ｗ２　第２凸条溶着部の溶着幅
Ｗ２ｗ　拡幅溶着部の溶着幅
  M Intake Manifold T Surge Tank Vd Vibration direction of vibration welding Fd Opposite direction 10 1st resin molded body 11 Branch pipe 12 1st outer wall part 14 1st flange part 15 1st convex welded part 15a Extended welding area 15c Curved welding area 20 2nd resin molded body 22 2nd outer wall part 24 2nd flange part 25 2nd convex welded part 25a Extended welding area 25a 1 Reference width welding part 25a 2 Widened welding part 25c Curved welding area Si, So Burr storage space 26 Inner rib 27 Outer rib S2 Cross-sectional area occupied by melting allowance in widened welded part St Cross-sectional area of burr reservoir space W1 Welding width of first convex welded part W2 Welding width of second convex welded part W2w Welding width of widened welded part

Claims (7)

  1. 　サージタンク及び複数の分岐管を画定するべく、第１樹脂成形体及び第２樹脂成形体の振動溶着により形成されるインテークマニホールドであって、
    　前記第１樹脂成形体は、第１フランジ部と、前記第１フランジ部から突出する第１凸条溶着部を含み、
    　前記第２樹脂成形体は、前記第１フランジ部と対向する第２フランジ部と、前記第２フランジ部から突出すると共に前記第１凸条溶着部と溶着される第２凸条溶着部と、前記第２凸条溶着部を挟んで内側及び外側にそれぞれバリ溜め空間を画定するべく前記第２フランジ部から突出すると共に前記第１フランジ部に対向する内側リブ及び外側リブを含み、
    　前記第１凸条溶着部及び第２凸条溶着部の一方は、前記第１凸条溶着部及び第２凸条溶着部の他方よりも溶着幅が狭い基準幅溶着部と、前記基準幅溶着部よりも幅を拡げて形成された拡幅溶着部を含む、
    インテークマニホールド。     An intake manifold formed by vibration welding of a first resin molded body and a second resin molded body in order to define a surge tank and a plurality of branch pipes.
    The first resin molded body includes a first flange portion and a first ridge welded portion protruding from the first flange portion.
    The second resin molded body includes a second flange portion facing the first flange portion, a second ridge welded portion that protrudes from the second flange portion and is welded to the first ridge welded portion. The inner rib and the outer rib that protrude from the second flange portion and face the first flange portion in order to define the burr accumulation space on the inner side and the outer side of the second convex welded portion, respectively, are included.
    One of the first ridge welded portion and the second ridge welded portion is a reference width welded portion having a narrower welding width than the other of the first ridge welded portion and the second ridge welded portion, and the reference width welding portion. Including a widened welded part formed wider than the part,
    Intake manifold.
  2. 　前記拡幅溶着部は、前記振動溶着の振動方向において離散的に配列されている、
    ことを特徴とする請求項１に記載のインテークマニホールド。     The widened welding portions are arranged discretely in the vibration direction of the vibration welding.
    The intake manifold according to claim 1.
  3. 　前記第１凸条溶着部及び前記第２凸条溶着部は、前記振動溶着の振動方向に伸長する伸長溶着領域と、前記第１フランジ部と前記第２フランジ部とが対向する対向方向に凸状に湾曲する湾曲溶着領域を含み、
    　前記拡幅溶着部は、前記伸長溶着領域に設けられている、
    ことを特徴とする請求項１又は２に記載のインテークマニホールド。     The first ridge welded portion and the second ridge welded portion are convex in the direction in which the extension welding region extending in the vibration direction of the vibration welding and the first flange portion and the second flange portion face each other. Includes a curved welding region that curves like a
    The widened welding portion is provided in the extended welding region.
    The intake manifold according to claim 1 or 2.
  4. 　前記第２凸条溶着部は、前記基準幅溶着部及び前記拡幅溶着部を含み、
    　前記拡幅溶着部の溶着幅寸法は、前記第１凸条溶着部の溶着幅寸法以下に形成されている、
    ことを特徴とする請求項１ないし３いずれか一つに記載のインテークマニホールド。     The second ridge welded portion includes the reference width welded portion and the widened welded portion.
    The welding width dimension of the widened welded portion is formed to be equal to or smaller than the welded width dimension of the first convex welded portion.
    The intake manifold according to any one of claims 1 to 3.
  5. 　前記拡幅溶着部における溶融代の占める断面積は、前記バリ溜め空間の断面積の０．７５～１倍に設定されている、
    ことを特徴とする請求項１ないし４いずれか一つに記載のインテークマニホールド。     The cross-sectional area occupied by the melting allowance in the widened welded portion is set to 0.75 to 1 times the cross-sectional area of the burr storage space.
    The intake manifold according to any one of claims 1 to 4.
  6. 　前記拡幅溶着部は、前記分岐管が配置される領域に設けられている、
    ことを特徴とする請求項１ないし５いずれか一つに記載のインテークマニホールド。     The widened welded portion is provided in a region where the branch pipe is arranged.
    The intake manifold according to any one of claims 1 to 5.
  7. 　前記第１樹脂成形体は、前記複数の分岐管と、前記複数の分岐管に連続して前記サージタンクの一部を画定する第１外壁部と、前記第１フランジ部と、前記第１凸条溶着部を含み、
    　前記第２樹脂成形体は、前記第１外壁部と協働して前記サージタンクを画定する第２外壁部と、前記第２フランジ部と、前記第２凸条溶着部と、前記内側リブ及び外側リブを含む、
    ことを特徴とする請求項１ないし６いずれか一つに記載のインテークマニホールド。
          The first resin molded body includes the plurality of branch pipes, a first outer wall portion that continuously defines a part of the surge tank in the plurality of branch pipes, the first flange portion, and the first convex portion. Including the welded part,
    The second resin molded body includes a second outer wall portion that defines the surge tank in cooperation with the first outer wall portion, the second flange portion, the second convex welded portion, the inner rib, and the inner rib. Including outer ribs,
    The intake manifold according to any one of claims 1 to 6.
PCT/JP2020/047902 2020-01-16 2020-12-22 Intake manifold WO2021145167A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005337108A (en) * 2004-05-26 2005-12-08 Toyota Boshoku Corp Connection structure of surge tank, surge tank, and intake manifold
JP2009002220A (en) * 2007-06-21 2009-01-08 Mahle Filter Systems Japan Corp Resin assembly and method for manufacturing the same
JP2015059431A (en) * 2013-09-17 2015-03-30 株式会社Roki Intake manifold
JP2018171712A (en) * 2017-03-31 2018-11-08 株式会社デンソー Joined body
JP2019137001A (en) * 2018-02-14 2019-08-22 トヨタ紡織株式会社 Welding rib structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005337108A (en) * 2004-05-26 2005-12-08 Toyota Boshoku Corp Connection structure of surge tank, surge tank, and intake manifold
JP2009002220A (en) * 2007-06-21 2009-01-08 Mahle Filter Systems Japan Corp Resin assembly and method for manufacturing the same
JP2015059431A (en) * 2013-09-17 2015-03-30 株式会社Roki Intake manifold
JP2018171712A (en) * 2017-03-31 2018-11-08 株式会社デンソー Joined body
JP2019137001A (en) * 2018-02-14 2019-08-22 トヨタ紡織株式会社 Welding rib structure

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