| 摘要 |
A first ceiling panel supporting stringer 1 has an insertion hole 10 formed through a main plate portion 4 thereof, and a second ceiling panel supporting stringer has a base plate portion 21 extending from an end thereof and having a forward end engageable with one side of the main plate portion 4 of the first ceiling panel supporting stringer 1, and a connecting projection 22 extending from the forward end of the base plate portion 21. The connecting projection 22 has a U-shaped rise 24, which is provided with a reinforcing rib 31 for improved strength. The first and second ceiling panel supporting stringers can be unseparably connected by pressingly inserting the connecting projection 22 of the second ceiling panel supporting stringer 1 through the insertion hole 10 of the first ceiling panel supporting stringer 1 without special skills. Also, the U-shaped rise 24 can be formed by swaging without preprocessing such as bending, so that the production process of the ceiling panel supporting stringer 1 can be facilitated, enhancing production efficiency and reducing production costs.
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