| 摘要 |
A frame (1) has elongated upper and lower angle members (2, 3) each comprising two parts (2A, 2B; 3A, 3B) both having L-shaped cross sections and joint portions (J) of T-shaped cross sections formed at adjacent end portions of the two parts. The legs (9) of the T-shaped joint portions (J) are connected by a coupling member (8) disposed on the legs and secured thereto by fastening members (10, 11). |
