Patent ID: 6305304
Filing Date: 2001-10-23
Classification: D05B

Abstract:
A sewing machine comprising:an upper shaft having an axial direction;two needles arranged in parallel to each other in said axial direction of said upper shaft, wherein said two needles are movable in a vertical direction to be synchronized with said upper shaft, and are possible to change a gap between themselves;two hooks, each positioned on locus of the vertical movement of said respective needle;two lower shafts including:each of said lower shafts having a leading end to which one of said two hooks is fixed, wherein each of said lower shafts is disposed in parallel to said upper shaft to rotate synchronizing with said upper shaft; andthe other of said lower shafts having a leading end to which the other of said two hooks is fixed, wherein said other of said lower shafts is disposed in parallel to said upper shaft to rotate such that said other of said lower shafts interlocks with said upper shaft;a link member linking between said lower shafts to synchronize rotations of said lower shafts;hook gap adjusting means for moving at least one of said lower shafts in said axial direction to change a gap between said two hooks;driving means, being electrically driven, for driving said hook gap adjusting means;control means for controlling said driving means such that said two hooks have a distance to each other corresponding to a distance between said two needles.