JPH0473377U

JPH0473377U -

Info

Publication number: JPH0473377U
Application number: JP11439290U
Authority: JP
Priority date: 1990-10-31
Filing date: 1990-10-31
Publication date: 1992-06-26

Description

[Brief explanation of the drawing]

第１図はこの考案に係る一実施例の外観を示す
正面図、第２図は第１図に示したものの平面図、
第３図は第１図に示したもののにおける糸結び動
作開始前の糸掛け状態を示す正面図、第４図は同
実施例における糸結び機構を示す要部拡大斜視図
、第５図ａ〜ｆは第３図に示したものの動作状態
を示す斜視図、第６図は第３図に示したものによ
り形成される糸の結節状態を示す説明図、第７図
は第４図に示したものの下側糸掛け部材に対する
糸掛け状態を示す平面図である。図において、８……上側糸掛け部材、８ａ，８
ｂ……溝部、９……下側糸掛け部材、９ａ，９ｂ
……溝部、｛１０……第１のクロスプレート、１
１……第２のクロスプレート、１２……糸案内フ
ツク｝……糸交叉機構、２０……第１の糸ガイド
、２０ａ……挿通孔（糸挿通部）、２１……第２
の糸挿通部、２１ａ，２１ｂ，２１ｃ……挿通孔
（糸挿通部）、Ｍ１……ミシンアーム、Ｉ１……
旧糸（使用中の糸）、Ｉ２……新糸（交換すべき
糸）。 Fig. 1 is a front view showing the appearance of an embodiment of this invention, Fig. 2 is a plan view of the one shown in Fig. 1,
Fig. 3 is a front view showing the threading state before the start of the thread tying operation in the device shown in Fig. 1, Fig. 4 is an enlarged perspective view of main parts showing the thread tying mechanism in the same embodiment, and Figs. f is a perspective view showing the operating state of the device shown in FIG. 3, FIG. 6 is an explanatory view showing the knotted state of the thread formed by the device shown in FIG. 3, and FIG. 7 is the same as shown in FIG. 4. FIG. 3 is a plan view showing a state in which the thread is threaded onto the lower thread threading member of the object. In the figure, 8... upper threading member, 8a, 8
b...Groove portion, 9...Lower thread hooking member, 9a, 9b
...Groove, {10...First cross plate, 1
DESCRIPTION OF SYMBOLS 1... Second cross plate, 12... Thread guide hook}... Thread crossing mechanism, 20... First thread guide, 20a... Insertion hole (thread insertion part), 21... Second
thread insertion part, 21a, 21b, 21c...insertion hole (thread insertion part), M1...sewing machine arm, I1...
Old thread (thread in use), I2...new thread (thread to be replaced).

Claims

[Scope of Claim for Utility Model Registration] A thread knot that connects the currently used sewing thread connected from the sewing needle provided at the tip of the sewing machine arm to the first sewing thread supply source to the thread to be replaced fed out from another sewing thread supply source. a thread tying mechanism, wherein the thread tying mechanism is formed such that a groove for hanging two threads fed out from the first thread supply source and another thread supply source is opened toward one end of the sewing machine arm. and a thread crossing mechanism that forms a machine knot by crossing both threads hooked to the thread hooking member, and both of the mechanisms are fixed to the upper surface of the sewing machine arm, and the groove portion of the thread hooking member is fixed to the upper surface of the sewing machine arm. The sewing machine arm is disposed at a position protruding from the front surface of the sewing machine arm, and has a thread insertion portion through which the thread from the sewing needle to the thread hook portion is inserted, the thread insertion portion protruding from the front side of the sewing machine arm, and the thread hook portion is disposed at a position protruding from the front surface of the sewing machine arm. A first sewing thread guide disposed to be located closer to the base of the sewing machine arm than the stop part, and a plurality of thread insertion parts through which threads fed out from each of the thread supply parts are inserted, respectively. 1. A thread exchange device for a sewing machine, comprising: a second thread guide disposed such that a portion thereof is located between the first sewing thread guide and each of the thread supply sources.