Patent ID: 11946580
Assignee: KOBE STEEL, LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 0:
1. A joined body comprising:
a tubular first member;
a second member including a plate-shaped wall portion in which a through-hole is formed, the first member being inserted into the through-hole; and
a collar member interposed between the first member and the second member in at least a part of a hole peripheral wall of the through-hole, wherein
the first member and the second member are joined by expanding the first member at a portion corresponding to the through-hole so that a pair of bulging portions is formed in the first member with respect to the through-hole as a boundary, and the second member and the collar member disposed between the pair of bulging portions,
wherein the wall portion includes a first main surface and a second main surface facing each other in a thickness direction of the wall portion, and
the collar member includes:
a first base portion disposed on the first main surface; and
a tubular portion connected to the first base portion, extending in the thickness direction to penetrate the through-hole, including a first end portion located at a distance from the second main surface in the thickness direction, and having an inner peripheral surface in contact with the first member and an outer peripheral surface in contact with the hole peripheral wall of the through-hole,
wherein the collar member in its entirety stays on the external surface of the first member.