| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite round beam inexpensively manufacturable with a simple structure, and capable of manufacturing many kinds of products different in roundness. SOLUTION: This composite round beam is formed by integrally joining an upper divided beam material 1 and a lower divided beam material 2 vertically divided and roundly bent in a round shape capable of superposing joining via a joint member 3. A flange part 6 respectively projecting sideways in the longitudinal direction is formed in a lower end part of the upper divided beam material 1 and an upper end part of the lower divided beam material 2. The upper-lower divided beam materials 1 and 2 are integrally joined by fitting the joint member 3 to the flange part 6 of both divided beam materials 1 and 2 in a state of allowing a lower end surface of the upper divided beam material 1 to abut on an upper end surface of the lower divided beam material 2. COPYRIGHT: (C)2007,JPO&INPIT
|
