JPS6312376U

JPS6312376U -

Info

Publication number: JPS6312376U
Application number: JP10600686U
Authority: JP
Priority date: 1986-07-10
Filing date: 1986-07-10
Publication date: 1988-01-27

Description

[Brief explanation of drawings]

図面は本考案を具体化した一実施例を示し、第
１図は回動腕及び糸繰出し腕が原位置に配置され
ている状態を示し、その要部のみを針板下方から
見た正面図、第２図は第１図における２―２線断
面図、第３図は下糸切断時を示す第１図に相当す
る正面図、第４図は第３図における４―４線断面
図、第５図は糸繰出し腕のみを示す正面図である
。３は針板、４は針孔、６は固定刃、８はボビン
、１０は回動腕、１４は刃部（移動刃）、１５は
糸繰出し腕、１７は糸繰出し部、１８は切欠、２
０はスリツト、２１は下糸捕捉孔（下糸捕捉部）
である。 The drawings show an embodiment embodying the present invention, and FIG. 1 shows a state in which the rotating arm and the thread pay-out arm are placed in their original positions, and is a front view of only the essential parts seen from below the throat plate. , FIG. 2 is a sectional view taken along the line 2-2 in FIG. 1, FIG. 3 is a front view corresponding to FIG. 1 showing when the bobbin thread is cut, and FIG. 4 is a sectional view taken along the line 4-4 in FIG. FIG. 5 is a front view showing only the thread payout arm. 3 is a throat plate, 4 is a needle hole, 6 is a fixed blade, 8 is a bobbin, 10 is a rotating arm, 14 is a blade part (movable blade), 15 is a thread feeding arm, 17 is a thread feeding part, 18 is a notch, 2
0 is the slit, 21 is the lower thread catching hole (lower thread catching part)
It is.

Claims

[Scope of claim for utility model registration] Fixed blade 6 fixed to one side of the needle hole 4 on the lower surface of the throat plate
The proximal end is rotatably supported on the lower surface of the throat plate 3 around a vertical axis, and the fixed blade 6 is attached to the distal end.
a rotating arm 10 having a movable blade 14 that cuts the bobbin thread extending from the bobbin 8 to the needle hole 4 in cooperation with the needle hole 4; , and a thread unwinding arm formed with a thread unwinding part 17 that engages with the lower thread and lets out the lower thread from the bobbin 8 prior to cutting the lower thread through cooperation between the movable blade 14 and the fixed blade 6. 15, when sewing is finished, the rotating arm 10 and the thread feeding arm 15 are rotated in one direction toward the fixed blade 6 to cut the bobbin thread, and then rotated in the opposite direction to release the original thread. In the sewing machine configured to be returned to the position, the thread letting-out section 17 of the thread letting-out arm 15 includes a bobbin thread catching section 21 that catches the bobbin thread when the thread letting-out arm 15 rotates in the one direction. A thread cutting device for a sewing machine, characterized in that: