JP2009101155A5

JP2009101155A5 -

Info

Publication number: JP2009101155A5
Application number: JP2008265138A
Authority: JP
Filing date: 2008-10-14
Publication date: 2012-10-18
Anticipated expiration: 2028-10-14

Claims

Arm (1),
Base plate (3),
A needle (6) supported in the arm (1) to guide the needle thread (8),
Hook (12),
A bobbin case (21) mounted in the hook (12) so as to be freely rotatable with respect to the hook (12);
Case lifter (33, 33 '), and
A sewing machine configured with control curves (39, 54),
The needle (6) can be driven to move up and down,
The hook (12) can be driven to rotate around the axis (13) in the rotational direction (40) by a vertical hook drive shaft (14, 14 '), and the hook drive shaft (14, 14). ') Configured with the lower side (55) facing
The case lifter (33, 33 ') are lifter lever (32, 32' and) is configured by a sensor (37,56) being a load by a spring (36, 36 '),
The control curve (39,54) is I drivable der to rotate about an axis of the hook drive shaft (14, 14 ') (13) at a rotational speed of the hook (12), the control disc In the sewing machine that is formed on the outer periphery of (38, 58) and in which the sensor (37, 56) can be installed against the control curve (39, 54) ,
The bobbin case (21) includes a lifter cam (31) and a stop rib (22), and the lifter cam (31) cooperates with the lifter lever (32, 32 ′) to form the stop rib ( 22) cooperates with a cam (23) fixed to the base plate (3) to prevent rotation of the bobbin case (21) in the direction of rotation (40);
The control curve (39,54), the speed of the stop rib (22) in the direction of rotation (40), have a significantly reduced is such a shape at a distance from the previous distance b of the cam (23) ,
For this purpose, the control curve (39, 54) has a substantially constant distance with respect to the axis (13), the maximum (42, 42 '), the minimum (43, 43'), and the transition zone (46 46 ′) and the transition zone (46) still has a distance b corresponding to 0.05 mm ≦ b ≦ 0.15 mm with respect to the cam (23) with which the retaining rib (22) is fixed. A sewing machine characterized by starting when it has .

The sewing machine according to claim 1 , wherein b≈0.1 mm applies to the distance b.

Control curve (39,54), characterized in that coupled to the hook (12) in non-rotating manner, the sewing machine according to claim 1.

Control curve (39), characterized in that attached to the hook drive shaft (14), the sewing machine according to claim 3.

Sewing machine according to claim 3 , characterized in that the control curve (54) is attached to the underside (55) of the hook (12).

Hook (12),
A bobbin case (21) mounted in the hook (12) so as to be freely rotatable with respect to the hook (12);
Case lifter (33, 33 '), and
A hook system for a sewing machine configured with control curves (39, 54),
The hook (12) can be driven to rotate around the axis (13) in the rotational direction (40) by the hook drive shaft (14, 14 ′), and the hook drive shaft (14, 14 ′). Configured with the lower side (55) facing the
The case lifter (33, 33 ′) includes a lifter lever (32, 32 ′) and a sensor (37, 56) loaded by a spring (36, 36 ′).
The control curve (39, 54) can be driven to rotate around the axis (13) of the hook drive shaft (14, 14 ') at the rotational speed of the hook (12). 38, 58) and the sewing machine hook system in which the sensor (37, 56) can be installed against the control curve (39, 54) .
The bobbin case (21) includes a lifter cam (31) and a stop rib (22), and the lifter cam (31) cooperates with the lifter lever (32, 32 ′) to form the stop rib (22). ) Cooperate with a cam (23) fixed to the base plate (3) to prevent rotation of the bobbin case (21) in the direction of rotation (40);
The control curve (39, 54) can be coupled to the hook (12) in a non-rotating manner;
The control curve (39, 54) has such a shape that the speed of the stop rib (22) in the rotational direction (40) is significantly reduced at a distance b from just before the cam (23),
For this purpose, the control curve (39, 54) has a substantially constant distance with respect to the axis (13), the maximum (42, 42 '), the minimum (43, 43'), and the transition zone (46 46 ′) and the transition zone (46) still has a distance b corresponding to 0.05 mm ≦ b ≦ 0.15 mm with respect to the cam (23) to which the retaining rib (22) is fixed. A hook system characterized by starting when having .

Hook system according to claim 6 , characterized in that the control curve (39) is attached to the hook drive shaft (14).

Hook system according to claim 6 , characterized in that the control curve (54) is attached to the underside (55) of the hook (12).