braid
辮 centers on the act of braiding, specifically intertwining strands of thread or hair into a single plait.
辮 combines 辡 (a doubled 辛, likely phonetic) with 糸 (thread), suggesting the idea of braiding threads together.
The outer 辡 looks like two twisted strands, and the inner 糸 is thread. Picture twisting threads together into a braid.
For ベン, imagine braiding a long bench of threads: bench -> ベン, and the threads are woven into a braid.