bamboo container for food
籩 centers on a container made of bamboo, specifically used for holding food.
籩 combines 竹 (bamboo) with 邊, which likely contributes the sound. The character denotes a bamboo vessel for food.
The top 竹 is bamboo, and the bottom 邊 suggests a container. Picture a woven bamboo basket filled with food.
For ヘン, imagine a hen pecking at food from a bamboo container: hen -> ヘン.