| 摘要 |
PURPOSE: A gas atmosphere substitution device of a kiln is provided to lift a door up and down by converting the linear motion of a cylinder into a rotatory motion and to seal a substitution chamber since the door is lifted down to be closely attached to a case body. CONSTITUTION: A gas atmosphere substitution device of a kiln comprises a case body, a door (200), a cylinder (300), a link (400), and a pinion gear (500). The pinion gear is connected through a shaft to a first pinion gear which is rotated while being interlocked with a first rack gear according to the state of the rack gear which moves back and forth, where the forward and backward movement is implemented according to the state of the operation of the cylinder. Stopper bearings, which prevent the door lifted up and down by being connected to the shaft from being lifted down further, are installed in the lower direction of an entrance and an exit which are formed on the case body. |
