JPH02148675U

JPH02148675U -

Info

Publication number: JPH02148675U
Application number: JP5771889U
Authority: JP
Priority date: 1989-05-18
Filing date: 1989-05-18
Publication date: 1990-12-18

Description

[Brief explanation of drawings]

第１図はこの考案を具体化したミシンの平面図
、第２図はミシンの底部フレームを省略して示す
平断面図、第３図は正断面図、第４図は可動刃作
動機構を示す側断面図、第５図は糸案内体作動機
構を示す側断面図、第６図は固定刃及び可動刃を
示す斜視図、第７図はミシンの上軸角度に対する
各部の作動タイミングを示すグラフである。２……針板、４……水平釜、８……ボビン、１
１……針、１３……糸案内体、２３……駆動部材
としての糸押えカム、３２……固定刃、３４……
可動刃、Ｙ１……上糸、Ｙ２……下糸。 Fig. 1 is a plan view of a sewing machine that embodies this idea, Fig. 2 is a plan sectional view with the bottom frame of the sewing machine omitted, Fig. 3 is a front sectional view, and Fig. 4 shows the movable blade operating mechanism. 5 is a side sectional view showing the thread guide operating mechanism, FIG. 6 is a perspective view showing the fixed blade and the movable blade, and FIG. 7 is a graph showing the operation timing of each part relative to the upper shaft angle of the sewing machine. It is. 2... Throat plate, 4... Horizontal hook, 8... Bobbin, 1
DESCRIPTION OF SYMBOLS 1... Needle, 13... Thread guide body, 23... Thread presser cam as a driving member, 32... Fixed blade, 34...
Movable blade, Y1... Upper thread, Y2... Lower thread.

Claims

[Claims for Utility Model Registration] The needle thread Y1 is moved up and down passing through the needle plate 2.
A needle 11 through which the bobbin thread is inserted, a horizontal hook 4 in which the bobbin 8 for bobbin thread is housed and rotated in a horizontal plane in order to form a stitch by cooperation with the needle 11, and one part of the horizontal hook 4. A fixed blade 32 disposed on the side, and a movable blade 34 that is reciprocated within a horizontal plane to cut the upper thread Y1 and lower thread Y2 in cooperation with the fixed blade 32.
The sewing machine is provided below the throat plate 2 so as to be able to move toward and away from the horizontal hook 4, and when moving away, retreats from the thread path between the throat plate 2 and the horizontal hook 4, and , a thread guide body 13 that bends both the upper and lower threads by engaging with both the upper and lower threads Y1 and Y2 when approaching, and arranges a part of the threads so as to cross the moving path of the movable blade 34; and the upper and lower threads Y1 and Y2. A thread cutting device for a sewing machine, comprising: a drive member 23 that drives the thread guide body 13 in synchronization with the reciprocating movement of the movable blade 34 during cutting.