| 摘要 |
According to this invention, a boat carried by an elevator is put on a boat supporting unit installed at a boat delivery position and capable of moving up and down and then, the boat is delivered from the boat supporting unit to transfer means for a heat-treating furnace. Therefore, boats can be transferred by the common elevator to the boat delivery positions at heat-treating furnace arranged in multiple stages. Even when heat-treating furnaces of different types are installed in multiple stages, boats can be transferred to those furnaces by using the common elevator. As a result, when boats to be sent to different types of furnaces arrive at the work position, for example, boats can be delivered to the furnaces with extremely high efficiency and by simple devices.
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