US 11,919,384 B2
Resin filler tube and manufacturing method for the same
Fumiya Mizuno, Komaki (JP); Tomoyuki Fukuyasu, Komaki (JP); Atsuo Miyajima, Komaki (JP); Yoshikazu Kaneyasu, Tokyo (JP); Nao Sato, Tokyo (JP); and Tsubasa Suzuki, Tokyo (JP)
Assigned to Sumitomo Riko Company Limited, Komaki (JP); and HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by Sumitomo Riko Company Limited, Komaki (JP); and HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Dec. 22, 2020, as Appl. No. 17/130,096.
Claims priority of application No. 2019-231091 (JP), filed on Dec. 23, 2019.
Prior Publication US 2021/0188082 A1, Jun. 24, 2021
Int. Cl. B60K 15/04 (2006.01); B29C 48/00 (2019.01); B29C 48/13 (2019.01); B29C 48/21 (2019.01); B29K 77/00 (2006.01); B29K 23/00 (2006.01)
CPC B60K 15/04 (2013.01) [B29C 48/0011 (2019.02); B29C 48/13 (2019.02); B29C 48/21 (2019.02); B29K 2023/065 (2013.01); B29K 2077/00 (2013.01); B60K 2015/0464 (2013.01); B60K 2015/047 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A resin filler tube to be welded to an outer circumferential edge of an opening hole of a fuel tank, the resin filler tube comprising:
a tubular body having an outermost layer formed by using an outermost layer material, and one or more inner layers each formed by using an inner layer material;
a flange having a plurality of layers that are of same kinds as those of the tubular body, the flange having a diameter greater than an outer diameter of the tubular body, a thickness greater than a thickness of the tubular body, and a predetermined width in an axial direction, the flange having a first axial end face forming a weld surface to be welded to the outer circumferential edge of the opening hole of the fuel tank; and
a base-end-side reverse tapered portion having a plurality of layers that are of same kinds as those of the tubular body, the base-end-side reverse tapered portion connecting between an end of the tubular body on the fuel tank side and an end of an outer circumferential surface of the flange on a side opposite to the fuel tank side, the base-end-side reverse tapered portion being reversely tapered so as to increase a diameter toward the flange, wherein
the base-end-side reverse tapered portion is formed so as to have an inner diameter that is not less than an inner diameter of the tubular body over an entire range in the axial direction, and
the base-end-side reverse tapered portion includes:
a first-stage reverse tapered portion connected to the end of the tubular body on the fuel tank side, the first-stage reverse tapered portion having a diameter increased toward the flange, and
a second-stage reverse tapered portion connecting between an end of the first-stage reverse tapered portion and the end of the outer circumferential surface of the flange on the side opposite to the fuel tank side, the second-stage reverse tapered portion having a diameter increased toward the flange, the second-stage reverse tapered portion having an outer circumferential surface that has a taper angle greater than a taper angle of an outer circumferential surface of the first-stage reverse tapered portion.