Futaba Industrial Co., Ltd.

Aoyama Seisakusho Co., Ltd.

Hirotaka Niinomi

Yukinori Fujimoto

Kazuhiro Koga

Keiichiro Masui

Masatoshi Tanabe

Yuusuke Asai

Yoshihiro Morioka

Provided is a method of manufacturing a pipe including a large-diameter portion, a small-diameter portion, and a reduced diameter portion connecting the large-diameter portion and the small-diameter portion, the method comprising: forming a metal plate member into a U-shaped member having a U-shaped cross section; and forming the U-shaped member into a shape of the pipe. The U-shaped member includes: a curved portion facing an opening between both edges of the U-shaped cross section; and two facing side walls continued from the curved portion. An opening degree of the two facing side walls in a portion to form the small-diameter portion is larger than an opening degree of the two facing side walls in a portion to form the large-diameter portion.

Method of manufacturing pipe

A pipe is formed by press molding a U-shaped member including a U-shaped cross section. The U-shaped cross section includes at least five curved portions. The curved portions include a center curved portion facing an opening of the U-shaped cross section defined by both edges of the U-shaped cross section; a first right curved portion; a second right curved portion; a first left curved portion; and a second left curved portion. At least the center curved portion, the first right curved portion, and the first left curved portion each have a radius of curvature smaller than a radius of curvature of a corresponding portion of the pipe cross section.

A nut is caulked and fixed to a plate material and a protrusion at an end of a collar is press-fitted into a recessed groove generated on the opposite surface of the plate material at the time of the caulking fixation, thereby fixing the nut and the collar to both surfaces of the plate material, respectively. The plate material is, for example, a metal panel, and the nut is, for example, a pierce nut. Since the collar is caulked and fixed, thermal strain is not generated.

Method for attaching nut and collar to plate material and attachment structure of nut and collar to plate material

Provided is a fastening component for vehicles that comprises a holding member, a nut, and a spacer. The holding member is made of a piece of plate material and bent to form first and second opposing portions that oppose each other. The nut comprises a bolt insertion hole and is arranged on an outer surface of the first opposing portion. The spacer having a cylindrical shape is arranged on an outer surface of the second opposing portion. The holding member comprises first and second through holes respectively penetrating the first and second opposing portions in respective thickness directions thereof. The first and second through holes are arranged to be continuous with the bolt insertion hole of the nut. The spacer is arranged to surround the bolt insertion hole when viewed along a central axis of the nut.

Growing community of inventors

Okazaki, Japan

Hirotaka Niinomi