Title:
NEEDLE-BAR STROKE CHANGER OF SEWING MACHINE
Document Type and Number:
Japanese Patent JP3646067
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a needle-bar stroke changer of a sewing machine capable of accurately changing needle-bar stroke.
SOLUTION: The needle-bar stroke changer of the sewing machine includes a needle-bar crank attached to an arm shaft, a connecting rod rotatably journaled to a portion of a needle bar, and an eccentric pin having eccentric mating shafts on the right and left for connecting the needle-bar crank and the connecting rod individually to the mating shafts. The changer varies the stroke of the needle bar by varying the condition in which the needle-bar crank mates with the eccentric pin. At least one dent is provided in the end face of the mating shaft mated with the needle-bar crank, along the diameter position of the shaft, and a protrusion is provided in the eccentric-pin mating hole of the needle-bar crank. To vary the needle-bar stroke, the eccentric pin is axially slid from the needle-bar crank and rotated 180°, after which the dent in the eccentric pin is mated again with the protrusion of the needle-bar crank.
Inventors:
Yoshihiro Yamazaki
Application Number:
JP2001018213A
Publication Date:
May 11, 2005
Filing Date:
January 26, 2001
Export Citation:
Assignee:
Pegasus Sewing Co., Ltd.
International Classes:
D05B55/14; (IPC1-7): D05B55/14
Domestic Patent References:
| JP2002219293A | ||||
| JP751480A | ||||
| JP5208087A | ||||
| JP2119892A | ||||
| JP11226283A | ||||
| JP5022464B1 | ||||
| JP4426697B1 | ||||
| JP6357078B2 | ||||
| JP223243B2 |