This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
簂 combines 竹 (bamboo) with 國, but the exact historical development and original meaning are uncertain.
The top is bamboo 竹 and the bottom is country 國. Imagine a bamboo artifact from an old country, but its exact purpose is unclear.
For ケ, picture a bamboo basket shaped like the letter K: K -> ケ, and the basket is from an old country.