| 摘要 |
A drive apparatus for an injection molding machine comprises a drive means (71), a rotation transmission shaft (88), a screw shaft (93), a nut (92) and a driven member (38). The rotation transmission shaft (88) is connected to the drive means (71) and rotated by the drive means. The screw shaft (93) is rectilinearly movably disposed, surrounds the rotation transmission shaft (88), and engages with an outer cylindrical surface of the rotation transmission shaft (88) on an inner cylindrical surface of the screw shaft (93). The nut (92) is threadably engaged with the screw shaft (93). The driven member (38) is disposed on the screw shaft (93). In this apparatus, the rotation generated by the drive means (71) is transmitted to the screw shaft (93) and the screw shaft is advanced and retracted not to rotate the nut (92). Therefore, the inertia of the drive apparatus becomes small and the response of mold opening/closing becomes rapid when the drive means is driven. <IMAGE> |
