Manufacturing method of building hardware

摘要

PROBLEM TO BE SOLVED: To provide a cylindrical joint metal easy-to-manufacture which is applied for joining a first member and a second member in a wooden structure capable of enhancing the construction efficiency by configuring to be easily inserted into a concave hole.SOLUTION: A cylindrical body 31 includes: plural first pin holes 15, 15 formed at one side 3a (first member side); and plural second pin holes 18, 19, 20 formed at the other side 4a (second member side). The cylindrical body 31 is formed in a pipe shape by bending a flat plate, and on one end 3 of the cylindrical body 31, a dome-like front end part 35 is formed. The dome-like front end part 35 is formed of a front end protruding plate 10, 10A (disposed without gap) at the one side 3 of the cylindrical body 1 by bending into a hemispherical outer shape.SELECTED DRAWING: Figure 1