公开(公告)号：US20210276101A1

公开(公告)日：2021-09-09

申请号：US17329468

申请日：2021-05-25

Applicant: STAR MICRONICS CO., LTD.

Inventor： Takayuki ISHIKAWA

IPC: B23B3/16 ,  B23B31/20 ,  B23B25/00

Abstract: A lathe capable of facilitating maintenance of a chucking mechanism. A chuck operating apparatus includes a claw and a shifter to open and close a chuck provided on a spindle. The tilt claw provided outside the spindle has a first posture to bring the chuck into the opened state and a second posture to bring the chuck into the closed state. The shifter provided outside the spindle and movable in a spindle axis direction is brought in a first position to bring the claw into the first posture and in a second position to bring the claw into the second posture. A roller is mounted on the shifter in a contact position with the claw to roll in the spindle axis direction.

公开(公告)号：US20180264609A1

公开(公告)日：2018-09-20

申请号：US15867611

申请日：2018-01-10

Applicant: STAR MICRONICS CO., LTD.

Inventor： Koji MASUDA ,  Takayuki ISHIKAWA ,  Motohiro KAWAMURA

IPC: B23Q7/00

CPC classification number: B23Q7/006 ,  B23B13/128

Abstract: The invention provides a machine tool capable of facilitating a process of switching product ejecting apparatuses. The machine tool comprises a spindle which rotates a workpiece around an axis of the spindle, an actuator which reciprocates a rod arranged parallel to the axis of the spindle, and a coupler switched between a coupling position and a standby position. The coupler connects the rod and an ejecting shaft inserted in the spindle when held in the coupling position. The coupler is not connected to at least the ejecting shaft when held in the standby position. The ejecting shaft along with the coupler is moved in the direction of the axis of the spindle according to reciprocation of the rod when the coupler is held in the coupling position.

公开(公告)号：US20170274457A1

公开(公告)日：2017-09-28

申请号：US15618355

申请日：2017-06-09

Applicant: STAR MICRONICS CO., LTD.

Inventor： Takayuki ISHIKAWA

IPC: B23B7/06

CPC classification number: B23B7/06 ,  B23B2260/008 ,  B23Q1/017 ,  B23Q1/26 ,  B23Q1/70 ,  F16C29/005 ,  F16C29/12 ,  F16C2322/39

Abstract: The invention provides a machine tool capable of facilitating a switching between a guide bush mode and a non-guide bush mode. A machine tool comprises a headstock provided with a main spindle for gripping a workpiece, a rail extended along a main spindle axis, a first bearing fixed to the headstock and guided on the rail, a second bearing fixed to the headstock on the front side of the first bearing and guided on the rail, a supporting bed on which a guide bush is removably mounted, and a guide mounted on the supporting bed to movably support the headstock in a direction of the main spindle axis when the guide bush is removed. The rail provides a larger play on the second bearing when the headstock is supported by the guide than when the headstock is not supported by the guide.