JPS63196672U

JPS63196672U -

Info

Publication number: JPS63196672U
Application number: JP8783387U
Authority: JP
Priority date: 1987-06-05
Filing date: 1987-06-05
Publication date: 1988-12-19

Description

[Brief explanation of the drawing]

第１図はこの考案の実施例のミシンの切断装置
における解除装置の正断面図、第２図は同じく側
断面図、第３図は第１図のＡ―Ａ線断面図、第４
図はこの考案の要部をなす解除装置およびクラツ
チ機構を示す斜視図、第５図Ａは切断装置が非作
動状態のときの解除装置とクラツチ機構を示す説
明図、第５図Ｂは第５図ＡのＢ―Ｂ線断面図、第
６図Ａは切断装置が作動状態のときの解除装置と
クラツチ機構を示す説明図、第６図Ｂは第５図Ａ
のＣ―Ｃ線断面図、第７図は解除操作体が操作さ
れてクラツチ機構が遮断する状態を示す説明図で
ある。６……メス駆動腕、７……係合体、１０……メ
ス軸、１５……第１の操作部、１９……第１のば
ね、２０……クラツチ体、２２……溝部、２３ａ
……平坦面、２９……第２のばね、３０……解除
操作体、３１……第２の操作部、３２……プツシ
ヤー、４０……カム。 1 is a front sectional view of a release device in a cutting device of a sewing machine according to an embodiment of this invention, FIG. 2 is a side sectional view of the same, FIG.
The figure is a perspective view showing the release device and the clutch mechanism that constitute the essential parts of this invention, FIG. A sectional view taken along line B-B in Figure A, Figure 6A is an explanatory diagram showing the release device and clutch mechanism when the cutting device is in the operating state, and Figure 6B is Figure 5A.
FIG. 7 is an explanatory view showing a state in which the release operation body is operated and the clutch mechanism is shut off. 6... Knife drive arm, 7... Engaging body, 10... Knife shaft, 15... First operating section, 19... First spring, 20... Clutch body, 22... Groove, 23a
... Flat surface, 29 ... Second spring, 30 ... Release operation body, 31 ... Second operation section, 32 ... Pusher, 40 ... Cam.

Claims

[Scope of Claim for Utility Model Registration] A knife shaft is supported by the sewing machine arm so as to be movable up and down, and has an upper knife fixed thereon for cutting the material to be sewn in cooperation with a lower knife disposed on the sewing machine bed. , a first spring that biases the knife shaft upward; a knife drive arm that is provided on the sewing machine arm so as to be able to swing up and down and has an engaging body protruding from its free end; and a knife drive arm that is integrated with the knife shaft. a clutch body that is provided to be movable up and down and rotatable around the female shaft; and a second spring that biases the clutch body to rotate in one direction; A flat surface that faces the engaging body of the knife drive arm and extends relative to the rocking locus of the engaging body, and is formed continuously with the flat surface so that the engaging body can fit therein and the clutch body can rotate. When the knife shaft is moved against the first spring, the clutch body is rotated by the biasing force of the second spring, and the knife driving arm is formed in the groove. A cutting device for a sewing machine configured such that an engaging body is fitted to connect the knife drive arm and the clutch body, comprising: a first operation part fixed to an upper end of the knife shaft; A release operating body is provided at the upper end of the female shaft so as to be movable up and down, and has a second operating section at the upper end and a pusher at the lower end; A sewing machine comprising: a cam that converts the pressing force of the pusher into a direction that rotates the clutch body against the second spring when the release operation body is pressed upward or downward. release device in a cutting device.