JPH02138681U

JPH02138681U -

Info

Publication number: JPH02138681U
Application number: JP4611389U
Authority: JP
Priority date: 1989-04-19
Filing date: 1989-04-19
Publication date: 1990-11-20

Description

[Brief explanation of drawings]

第１図はこの考案に係る一実施例の全体構成を
示す平面図、第２図は第１図に示した作動部Ｂを
示す斜視図、第３図は第２図に示したものの底面
図、第４図は第３図に示した糸捕捉刃及び回転移
動刃の取付状態を示す平面図、第５図は第１図に
示した解除部材の一部切欠斜視図、第６図は第２
図に示した回転移動メスの取付状態を示す平面図
、第７図ａ〜ｆは第２図に示したものの動作状態
を示す一部切欠底面図、第８図ａ〜ｅは、従来の
ミシンの糸切り装置の一例を示す底面図である。Ａ……駆動部（駆動手段）、Ｐｃ……糸切断位
置、１１……糸切り土台、２１……解除部材、２
４……糸捕捉刃、２８……係止部材（ストツパ）
、３１……移動刃駆動台（駆動部材）、３１ａ…
…係合溝、３９……回転移動刃、３９ａ……刃部
。 Fig. 1 is a plan view showing the overall configuration of an embodiment of this invention, Fig. 2 is a perspective view showing the actuating section B shown in Fig. 1, and Fig. 3 is a bottom view of what is shown in Fig. 2. , FIG. 4 is a plan view showing the attached state of the thread catching blade and rotationally moving blade shown in FIG. 3, FIG. 5 is a partially cutaway perspective view of the release member shown in FIG. 1, and FIG. 2
7a-f are partially cutaway bottom views showing the operating state of the rotating knife shown in FIG. 2, and FIGS. 8a-e are views of a conventional sewing machine. It is a bottom view showing an example of a thread cutting device. A... Drive unit (drive means), Pc... Thread cutting position, 11... Thread cutting base, 21... Release member, 2
4... Thread catching blade, 28... Locking member (stopper)
, 31... movable blade drive stand (drive member), 31a...
...Engagement groove, 39...Rotating movable blade, 39a...Blade portion.

Claims

[Scope of Claim for Utility Model Registration] A sewing thread catcher formed at one end by a predetermined driving means that fits in a thread trimming base fixed to the sewing machine frame so as to be capable of linear reciprocating motion and operates in response to a thread trimming command; a thread catching blade that reciprocates along a straight path from an initial position where the thread cutting blade is spaced from a thread cutting position set near the needle drop point to a predetermined return movement starting point via the cutting position; and the thread cutting base. A blade portion formed at one end is rotatably attached to the thread cutting knife so that the blade portion can move along a substantially arcuate curved path from a predetermined initial position that deviates from the movement path of the thread trimming knife to the cutting position. a movable blade; a drive member that fits into the thread cutting base so as to be capable of linear reciprocating movement and rotates the rotationally movable blade by the reciprocating motion; an elastic member that constantly biases the drive member in the forward direction; a locking member that engages with an engagement groove formed on one side of the driving member when the driving member is at the forwardmost position, and locks the driving member at the forwardmost position; and the thread catching blade. The locking member moves together with the thread catching blade, comes into contact with the end of the driving member at the initial position of the thread catching blade, holds the driving member at the most backward movement position, and after the thread catching blade moves back to the thread cutting position. A thread cutting device for a sewing machine, comprising: and a release member for releasing the engagement with the engagement groove.