US 12,420,327 B2
Joint structure for groove-shaped members and joining method for groove-shaped members
Hao Huang, Fukuoka (JP)
Assigned to MATSUMOTO INDUSTRY CO., LTD., Fukuoka (JP)
Appl. No. 18/844,528
Filed by MATSUMOTO INDUSTRY CO., LTD., Fukuoka (JP)
PCT Filed Mar. 4, 2023, PCT No. PCT/JP2023/008196
§ 371(c)(1), (2) Date Sep. 6, 2024,
PCT Pub. No. WO2023/171586, PCT Pub. Date Sep. 14, 2023.
Claims priority of application No. 2022-034028 (JP), filed on Mar. 7, 2022.
Prior Publication US 2025/0196217 A1, Jun. 19, 2025
Int. Cl. B21D 39/03 (2006.01); B21D 19/08 (2006.01)
CPC B21D 39/03 (2013.01) [B21D 19/08 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A joint structure for groove-shaped members in which a substantially U-shaped cross-sectional first groove-shaped member and second groove-shaped member each including a bottom surface portion and a pair of side surface portions rising from both ends of the bottom surface portion are fitted to each other with the bottom surface portions and the pairs of side surface portions in close contact with each other and are joined, comprising:
a bottom surface clinched portion formed on the bottom surface portions in fitted portions of the first groove-shaped member and the second groove-shaped member by spot clinching; and
a pair of edge folding portions each formed on the pairs of side surface portions in the fitted portions by hemming.