rolling pin for horse chestnut noodles
A specialized rolling pin used to make 栃麺 (tochi-men), noodles made from horse chestnut flour. The dough is very sticky and must be rolled quickly, hence the tool's name.
A tochi-menbou is a tool for rolling out noodles made from horse chestnuts.
Figurative use derived from the haste needed when rolling horse chestnut noodle dough. Often used in set phrases like 栃麺棒で追い立てられる (to be rushed as if with a rolling pin).
He finished his work as if being chased by a rolling pin.