BOBBINLESS DEVICE FOR CONTINUOUSLY FEEDING LOWER THREAD

Japanese Patent JP2015054229

A

PROBLEM TO BE SOLVED: To provide a bobbinless device for continuously feeding a lower thread which enables sewing operation while a bobbin is eliminated from a sewing machine, and a lower thread 24 is continuously fed from the outside of an outer hook 2 to the inside of an inner hook 3.SOLUTION: A lower thread protection pipe 5(3) is introduced from a sewing machine head part to a sewing machine bottom part and is connected to a lower thread protection pipe 5(1). The lower thread protection pipe 5(1) is inserted into an insertion hole of a rotary shaft 1 to be inserted into and connected to a joint shaft thread inlet 6c fitted to the front end of the rotary shaft 1 together with the outer hook 2, and is attached and fixed to the sewing machine bottom part with a support metal fitting 7. A joint shaft thread outlet 6d attached to the outer hook 2 is inserted into and connected to a thread inlet 5a of a lower thread protection pipe 5(2). A thread outlet shaft 5c of the lower thread protection pipe 5(2) is extended from the outer hook 2 to the inner hook 3 through a fitting part between a guide rail groove 2e on an outer hook side face and a guide rail 3f on an inner hook side face to be embedded in a groove 3h in the lower part of a guide rail notch part 3f(1) on the inner hook side face, and is inserted into the tube of a lower thread protection pipe attachment metal fitting 8 attached to a lower thread protection pipe attachment port 3b to be attached and fixed thereto. A bobbin case 4 is set in the inner hook 3.

JP4721148	Sewing machine clutch device
JP3971845	SEWING MACHINE WITH BOBBIN WINDING DEVICE

ARAI TAKESHI

JP2013207683A

March 23, 2015

September 13, 2013

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ARAI TAKESHI

D05B59/00

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