APPARATUS FOR VIEWING INSIDE OF DRY FURNACE

摘要

An apparatus for observing inside a drying furnace is provided to detect defective drying in advance, and to reduce manufacturing costs by observing inside the drying furnace through the apparatus frequently. An apparatus for observing inside a drying furnace comprises a coupling tube(110), a fixed plate(200), a movement plate(300) and a rotational shaft(400). The coupling tube is fixed to a hole drilled in a wall surface of one side of the drying furnace. The fixed plate has an observation hole connected to the coupling tube. The movement plate has size mating to the fixed plate, and one portion provided with a hole having transparent glass(320) mating to the observation hole. The rotational shaft couples the movement plate to the fixed plate so as to be rotated.