| 摘要 |
A clip ( 10 ) has a frame ( 31 ) and a flapper ( 32 ). Two dry bearings ( 37 ) are inserted into a hole ( 32 d) formed in the flapper. Then an attaching shaft ( 35 ) is inserted from one of the holes ( 34 a) in the frame ( 31 ) to the other through the dry bearings ( 37 ), so as to swingably attaching the flapper ( 32 ) to the frame ( 31 ). DAIDAYNE DDK 01 of DAIDO METAL Corp. is used as the dry bearing ( 37 ). A first and a second clip covers ( 51,52 ) are provided to cover the clips ( 10 ). Fresh air feeding pipes ( 55 ) are connected to the first and second clip covers ( 51,52 ). Fresh air is fed from the fresh air feeding pipes ( 55 ) toward the clips ( 10 ) through air outlets ( 56 ) provided in the first and second clip covers ( 51,52 ).
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