Reborn as a Vending Machine, I Now Wander the Dungeon, Vol. 1 (light novel)

A middle-aged man with only one passion in his life meets a fitting end in a traffic accident. That's where most stories would end, but instead, this is when his story begins when he's reborn as what he admired the most in life—a vending machine! But his new lease on life(?) happens in the worst place possible—what can a vending machine do in a monster-infested dungeon when he can't speak or even move on his own?