JPH047074U

JPH047074U -

Info

Publication number: JPH047074U
Application number: JP4514390U
Authority: JP
Priority date: 1990-05-01
Filing date: 1990-05-01
Publication date: 1992-01-22

Description

[Brief explanation of the drawing]

第１〜３図はこの考案の１実施例を示し、第１
図は自動糸切りミシンの下糸挟持装置を示す一部
断面図、第２図は同装置を示す分解斜視図、第３
図は可動刃の先端部を示す斜視図である。１……針板、２……ボビンケース、２ａ……ボ
ビン、３……釜取付台、３ａ……ピン用孔、４…
…可動刃、４ａ……糸さばき部、４ｂ……糸捕捉
用フツク部、５……固定刃、６……ブラケツト、
７……トラツパー、７ｂ……先端部、８……弾性
的押圧装置、９……ピン、１０……作動ピン、１
１……圧縮ばね、１２……調圧ねじ、１３……ロ
ツクナツト、１４……ミシンベツド、ＴＢ……下
糸。 Figures 1 to 3 show one embodiment of this invention.
The figure is a partial sectional view showing the bobbin thread clamping device of the automatic thread trimming sewing machine, Figure 2 is an exploded perspective view showing the same device, and Figure 3
The figure is a perspective view showing the tip of the movable blade. 1... Throat plate, 2... Bobbin case, 2a... Bobbin, 3... Hook mounting base, 3a... Pin hole, 4...
...Movable blade, 4a... Thread handling section, 4b... Thread catching hook section, 5... Fixed blade, 6... Bracket,
7... Trapper, 7b... Tip, 8... Elastic pressing device, 9... Pin, 10... Operating pin, 1
1...Compression spring, 12...Pressure adjustment screw, 13...Lock nut, 14...Sewing machine bed, TB...Bobbin thread.

Claims

[Claims for Utility Model Registration] (1) A throat plate attached to the sewing machine bed, a fixed blade positioned below the throat plate and fixed to the sewing machine bed side, and a fixed blade supported on the sewing machine bed side, the throat plate It moves in a reciprocating arc downward along the side of the fixed blade, catches the upper thread connected to the needle and the lower thread connected to the bobbin bobbin at the operating position, then cuts it in cooperation with the fixed blade, and returns to the return position. A bobbin thread clamping device for an automatic thread trimming sewing machine, comprising a movable blade that returns to its original position, the hook being swingably supported on the hook mount side fixed to the sewing machine bed, and a hook for catching the thread of the movable blade that is in the return position. A trapper whose tip is pressed near the section to hold the cut bobbin thread; an operating pin that is placed in a pin hole provided on the hook mount side and presses and swings the trapper; 1. A bobbin thread clamping device for an automatic thread trimming sewing machine, comprising: a compression spring that is biased to protrude and biased; and a pressure adjustment screw that is screwed into the pin hole and adjusts the elastic force of the compression spring. (2) The bobbin thread clamping device for an automatic thread trimming sewing machine according to claim (1), further comprising a lock nut for fixing the pressure adjusting screw.