CS268227B1 - Lower thread mechanism for chain-stitch sewing machine - Google Patents

Abstract

filament refers to the lower Nile the chain-of-the-chain machine. Bottom Nile Meohanism Contains Bottom the yoke lever pivotally mounted on the pin embedded in the Aioi motherboard machinery. Bottom Lever Lever In Its with a hook on the front part a guide rail for guiding and stretched1 is poured.

Description

The present invention relates to a lower thread dochaniene of a chain silage machine.

The known bottom mine meohanism of the Sio machine for loosening and tensioning the bottom yarn comprises at least one rotating control lamella, which are associated with two lower thread threads formed on a fixed bracket located next to the control lamella. The lower thread guided through the dies is loosened and tensioned by the surface of at least one of the control slats coinciding with the speed of the main shaft of the machine.

A disadvantage of this lower yarn meohanism is that the lower yarn is very difficult to thread into the draw-throughs and performs a considerable inertial movement on high-speed Siohoh machines. In addition, the control plates are difficult to manufacture and balance.

It is an object of the present invention to overcome these disadvantages of the bottom thread mechanism.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a low-level low meohanism of a Si machine which includes a simple single-lever rivet lever allowing reliable stitch binding even at high machine speeds.

The problem is solved by the lower thread meohanieraen of the Sio machine, which is based on the fact that the lower handle is provided with an anchor hook in its front part, having a guide sliding surface yellow.

Further features and advantages of the lower thread mechanism of the chain sewing machine result from the description of the exemplary embodiment shown in the accompanying drawing, wherein FIG. 1 is a view of the drop thread mechanism and FIG. 2 shows the detail of the thread mechanism itself.

The stitching machine comprises a base plate (FIG. 1), in the lower part of which the main shaft of the machine is provided, equipped with a crank connected to the eye 2 formed on the connecting rod. It is connected via a pivoted fork lever 4 to a lower altar lever 6, which is supported pivotably on a pin 10 fixed to the machine base plate. The connection of the fork lever 4 and the lower thread lever <5 is carried out by means of a fixed screw 2, allowing its adjustment. The lower rivet lever 6 is located in the fork 11, which is fastened to the link 2, and is provided with two dies for guiding the lower thread 14. A thread hook 1b having a sliding surface 11 is formed in the front part of the lower thread lever 6.

The lower, threaded meohanism flows as follows:

The pivoting movement of the main shaft of the machine is transmitted by a crank to a connecting rod which has an ellipse having an elliptical movement. The movement of the connecting rod 6 is also pushed by the fork-like pivot lever 6 to the lower-level lever 6, which performs a rocking movement between the dies 8, 2. Both these movements cause the yarn 14 to be threaded into the dies 8 during movement. The thread 14 runs freely to the Spioi of the gripping hook 10 as the loop is moved back from the Sewing Needle 21.

Claims (1)

The lower thread moohaniamus of the chain sieve machine, comprising a lower rivet lever mounted pivotably between the fork and the thread guides for the thread guide, characterized in that the lower node lever (6) is provided with a hook (10) in its front part 1 i) threads (14).