| 摘要 |
PROBLEM TO BE SOLVED: To support one end of a screw structure in the state of inhibiting its axial movement, in supporting one end of the screw structure supporting a plurality of screw units by a second shaft by a bearing. SOLUTION: The screw structure has the second insertion hole 26 of a first shaft 22 in a screw unit, a second shaft 31 of a square cross-section which can be fitted into the insertion hole 26, a top body 45 having a support hole 46 of a square cross-section into which the shaft 31 can fit, and a bearing portion 41 rotatably supporting the top body 45. The bearing portion 41 is installed on a foundation bed, adjacent screw units 20 are mutually linked and supported by fitting both ends of the second shaft 31 into the second shaft insertion hole 26 of the shaft body 23, the second shaft 31 projecting from the screw unit 20 located at the end is fitted into the support hole 46 of the top body 45. The top body 45 is rotatably supported on the bearing portion 41, the end face of the second shaft 31 supported on the bearing portion 41 through the top body 45 is inhibited from making an axial movement by a receiving member 47 provided in the bearing portion 41. COPYRIGHT: (C)2008,JPO&INPIT
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