公开(公告)号：US12257636B2

公开(公告)日：2025-03-25

申请号：US17329468

申请日：2021-05-25

Applicant: STAR MICRONICS CO., LTD.

Inventor： Takayuki Ishikawa

IPC: B23B31/20 ,  B23B13/02 ,  B23B3/16 ,  B23B13/12

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：US10335860B2

公开(公告)日：2019-07-02

申请号：US15618355

申请日：2017-06-09

Applicant: STAR MICRONICS CO., LTD.

Inventor： Takayuki Ishikawa

IPC: B23B7/06 ,  B23Q1/26 ,  B23Q1/70 ,  F16C29/12 ,  F16C29/00 ,  B23Q1/01

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.

公开(公告)号：US20210276100A1

公开(公告)日：2021-09-09

申请号：US17329450

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 shortening a spindle with respect to a spindle axis direction. A spindle provided with a chuck at the front end thereof is rotatably supported on a support by bearings. A chuck operating apparatus includes a tilt claw and a shifter. A built-in motor is disposed between the bearings to rotate the spindle. The claw is provide outside the spindle and between the bearings. The claw has a movable end whose distance from the spindle axis varies between 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 is provided outside the claw and movable in the spindle axis direction to be 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.

公开(公告)号：US20210276106A1

公开(公告)日：2021-09-09

申请号：US17329504

申请日：2021-05-25

Applicant: STAR MICRONICS CO., LTD.

Inventor： Takayuki Ishikawa

IPC: B23B31/26 ,  B23B31/20

Abstract: A chuck operating apparatus includes a claw, a shifter, and a shifter drive unit. The rotatable claw 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 rotatable shifter 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. The shifter drive unit has a shifter lever having an insertion part provided with a shifter bearing capable of being brought into contact with a side surface of an outward groove of the shifter. A roller is provided on one of the claw and the shifter in a contact position with the other to roll in a spindle axis direction and a groove is formed on the other to receive the roller when the chuck is in the opened state.

公开(公告)号：US12251764B2

公开(公告)日：2025-03-18

申请号：US17329504

申请日：2021-05-25

Applicant: STAR MICRONICS CO., LTD.

Inventor： Takayuki Ishikawa

IPC: B23B31/16 ,  B23B25/00 ,  B23B31/20 ,  B23B31/26

Abstract: A chuck operating apparatus includes a claw, a shifter, and a shifter drive unit. The rotatable claw 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 rotatable shifter 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. The shifter drive unit has a shifter lever having an insertion part provided with a shifter bearing capable of being brought into contact with a side surface of an outward groove of the shifter. A roller is provided on one of the claw and the shifter in a contact position with the other to roll in a spindle axis direction and a groove is formed on the other to receive the roller when the chuck is in the opened state.

公开(公告)号：US12011768B2

公开(公告)日：2024-06-18

申请号：US17329450

申请日：2021-05-25

Applicant: STAR MICRONICS CO., LTD.

Inventor： Takayuki Ishikawa

IPC: B23B3/16 ,  B23B25/00 ,  B23B31/20 ,  B23Q39/00

CPC classification number: B23B3/16 ,  B23B25/00 ,  B23B31/2072 ,  B23Q2039/008 ,  Y10T279/17119

Abstract: A lathe capable of shortening a spindle with respect to a spindle axis direction. A spindle provided with a chuck at the front end thereof is rotatably supported on a support by bearings. A chuck operating apparatus includes a tilt claw and a shifter. A built-in motor is disposed between the bearings to rotate the spindle. The claw is provided outside the spindle and between the bearings. The claw has a movable end whose distance from the spindle axis varies between 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 is provided outside the claw and movable in the spindle axis direction to be 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.

公开(公告)号：US12005511B2

公开(公告)日：2024-06-11

申请号：US17827445

申请日：2022-05-27

Applicant: STAR MICRONICS CO., LTD.

Inventor： Takayuki Ishikawa ,  Hiroyuki Ogasawara

IPC: B23B29/32 ,  B23B13/02 ,  B23B27/06 ,  B23Q39/00 ,  B23Q39/02

CPC classification number: B23B29/326 ,  B23B13/02 ,  B23B27/065 ,  B23Q2039/008 ,  B23Q39/027

Abstract: A machine tool includes a spindle capable of holding a workpiece and rotatable on a spindle axis and a tool post on which a tool is attachable to machine the workpiece held by the spindle. The tool post includes a first turnable holder turnable on a first turning axis perpendicular to the spindle axis. The first turnable holder has a first tool unit mounting part where a rotary tool is attachable. The tool post further includes a second turnable holder turnable on a second turning axis perpendicular to the spindle axis and different from the first turning axis. The second turnable holder has a second whirling tool mounting part where a thread whirling tool is attachable.

公开(公告)号：US10427260B2

公开(公告)日：2019-10-01

申请号：US15867611

申请日：2018-01-10

Applicant: STAR MICRONICS CO., LTD.

Inventor： Koji Masuda ,  Takayuki Ishikawa ,  Motohiro Kawamura

IPC: B32B13/12 ,  B23Q7/00 ,  B23B13/12

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.