| 摘要 |
PROBLEM TO BE SOLVED: To reduce weight of a screw feeding device even when moving a cargo having large load by the screw feeding device. SOLUTION: This screw feeding device 1 is provided with a bolt body 6 supported on a fixed side member 3 to reciprocate and turn A, B freely around a shaft axis 2, an electric motor 7 driving the bolt body 6 to reciprocate and turn A, B, and a movable body 9 screw-fitted in the bolt body 6 to reciprocate and move C, D freely in the axial direction of the bolt body 6 in accordance with reciprocation and turn A, B of the bolt body 6 and move the cargo 8 in the interlocking relationship with the moving. The movable body 9 is provided with a nut body 13 screw-fitted in the bolt body 6 on the shaft axis 2 and a movable body body 15 connected with the cargo 8 in the interlocking relationship and fitting the nut body 13 in play. The movable body body 15 has a frame shape having a pair of facing plates 28, 28 facing each end face in the axial direction of the nut body 13. Through holes 33 passing through a halfway part in the axial direction of the bolt body 6 in a play fitting manner are formed in each facing plate 28, respectively. COPYRIGHT: (C)2004,JPO
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