| 摘要 |
<p>Disclosed is a furnace in which the inside of the furnace (11) enclosed by a furnace wall having an inner surface lined with a heat insulating material (17, 18, 25) is vertically divided into upper and lower furnace chambers (45, 46) by a partition (43, 44). Heaters (81) for heating the inside of the upper furnace chamber (45) to a predetermined temperature, and an upper turntable (48) supported so as to be rotatable horizontally and arranged to mount works (67) on an upper surface thereof are provided in the upper furnace chamber (45). Other heats (85) for heating the inside of the lower furnace chamber (46) to a predetermined temperature, and a lower turntable (41) supported so as to be rotatable horizontally independently of the upper turntable (48) and arranged to mount works (67) on an upper surface thereof are provided in the lower furnace chamber (46). Delivery of a work (67) from/to the outside of the furnace to/from each of the upper and lower turntables (48, 41) is performed by insertion of a fork (68) through an opening (71, 72) formed in a predetermined position of the furnace wall (17). In this configuration, for example, carburizing treatment on a work is carried out in the upper furnace chamber (45) and diffusion treatment on a work is carried out in the lower furnace chamber (46).</p> |
