| 摘要 |
PROBLEM TO BE SOLVED: To prevent a moment from acting on a screw even if a radial load is generated in a pulley by an easy configuration.SOLUTION: In an injection device 40 of an injection molding machine, a drive shaft 43 connected with a rear end of a screw 41 is disposed to be enclosed with a housing 44, and the drive shaft 43 is disposed to be rotatable and to be able to move in the central axis O direction. A radial bearing 45 and a thrust bearing 51 are mounted on the drive shaft 43, and the outer races of both bearings 45 and 51 are mounted on the housing 45. A driven pulley 60 is fixed to the drive shaft 43, the torque of a drive motor 58 provided at the outer peripheral side of the housing 44 is transmitted to the driven pulley 60 and the drive shaft 43 through a belt 61, and a screw 41 is rotated in a heating cylinder 71. The center position of the width direction of the belt 61 and the center position of the radial bearing 45 overlap with a line L orthogonal with the central axis O of the drive shaft, and thereby a moment does not act on the screw 41. |
