JPS6391279U - - Google Patents

Description

[Brief explanation of the drawing]

Figures 1a and 1b are a top view and a front view, respectively, of the main parts of the safety device of the upper looper stop mechanism according to this invention;
FIG. 2 is a perspective view of essential parts showing the release lever in an incorrectly engaged state, FIG. 3 is a front view of an example of the entire conventional upper looper stop mechanism, and FIG. 4 is a vertical cross-sectional view of the escape hole thereof. Fig. 5 is a perspective view of the main part showing the release lever in the properly engaged state, Fig. 6 is a perspective view of the main part in the incorrectly engaged state (corresponding to Fig. 2 of the embodiment), and Fig. 7 and 8
Figures a, b, and c are a top view, a front view, and a sectional view of the machine frame wall of the relief hole, respectively, showing operation sequence diagrams of other improvement examples. FIG. 7 is a perspective view showing an operation sequence of an improved example. 1... upper looper release arm, 1a... dent,
1b...Top surface slope part, 2...Release lever, 2
a...Lower edge rounded part, 3...Upper looper swing arm, 4...
...Activating arm, P...pin, Lu/L1...upper/lower looper.

Claims (1)

[Scope of utility model registration request] In the two-needle, multi-thread lock sewing machine, the upper surface of the upper looper release arm is formed to be inclined downward toward the tip, and the upper surface of the upper looper release arm of the release lever pivotally supported by the upper looper swing arm is A safety device for an upper looper stop mechanism of a lock sewing machine, characterized in that a lower edge at the start of engagement with an engagement groove is smoothly rounded.