Packing and steam cooking device and method for manufacturing steam cooking device

摘要

An insertion hole (83a) is provided in a packing (83) and a rotating shaft (81a) is inserted into the insertion hole (83a). A sliding portion (83b) forming an air clearance (83c) is provided on the outside of the packing (83). The rotating shaft (81a) is inserted into the insertion hole (83a) with a grease G applied to the circumferential surface thereof. When the rotating shaft (81a) is inserted, the grease G is shaved off by the sliding portion (83b) and a sufficient amount of the grease G is stored in the air clearance (83c). Consequently, frictional sound and heat are and thus reduced between the rotating shaft (81a) and the packing (83), the sliding portion (83b) can come into tight contact with the rotating shaft (81a), thereby enhancing airtightness.