curtain at front of carriage
幰 centers on a specific type of covering: a curtain hung at the front of a carriage. Its meaning is narrow and concrete, with no common abstract extensions.
幰 combines 巾 (cloth) with 憲, which likely provides the sound. The character was created to name a specific carriage curtain.
The cloth radical 巾 on the left hints at fabric. The right side 憲 looks like a complex structure with a roof-like top, suggesting a carriage with a cloth curtain hanging at the front.
For ケン, imagine a carriage driver named Ken pulling back the front curtain: Ken -> ケン, and the curtain is made of cloth (巾).