SU317293A1 - PETROL FOR THE MANUFACTURE OF A SECURITY DOUBLE-THREAD CHAIN STITCH - Google Patents

Description

The proposed looper can be used in sewing machines for making invisible stitches, for example, when filing a bottom nalto, a dress, a bottom of trousers, etc.

A known looper for making a countersunk two-pitch chain stitch contains a hook and an expander.

The purpose of the invention is. getting a good grip loop of the looper with a needle.

This is achieved by the fact that the extender is provided with a fork to hold and expand the thread and an extender, as well as is spring-loaded and hinged on a hook that has a thread guide and a hole for filling the thread into it.

FIG. 1 shows a double-thread secret chain weave, general view; in fig. 2 - looper in four projections; in fig. 3 shows diagrams explaining the stitch formation process for the four positions of the looper; in fig. 4 - kinematic diagram of the machine.

The looper contains odiorozhkovy hook 1 and the extender 2 (see Fig. 2), which is attached to the hook and spring-loaded with a hinge screw 3. One end of the spring 4 is hooked with a screw 5, and the other is inserted into the longitudinal groove of the expander.

Model 6 (see Fig. 4), which the hinge is connected to the hinge 7, and the rod - in the fork 8, communicating through the hinge axis with the coupling 9. Last through the crankshaft 1

connected to the main shaft 11 of the mashina. At the end of the hook there is a hook. groove hole for threading.

One end of the extender is made in the form of a fork 12, intended for expansion

looper thread, and the other end is provided with a step 13, which, during operation of the machine, interacts with the needle plastip.

The looper works as follows o6pa3oi | i (see Fig. 3).

The stitched product is placed under the needle plate and pressed against the movable platform with the tabs and the extruder. The machine turns on, with: I position. Curve needle 14, moving with

to the right, pierces the sewn-up fabrics curved by the extruded end and leaves the padding plate 15. When the needle reaches the rightmost position, the needle begins to move to the left, resulting in a needle

threads 16.

And position. The overlap enters into the 1Н1п 1С loop and leads thread 1 tucked into the hook into it. III nozheeeiye. Holding onto not yourself

Sit it on the left side of the stitch and needle plate. The needle, meanwhile, having reached the leftmost position, moves to the right, and the engine of the fabric moves the stitched fabrics for the length of the tie.

IV of the aforementioned. The hook 1 and the dilator 2 fit into the window of the needle plate.

The expander protrusion 13 touches the needle plate area, and the vnlochka 12 moves away from the hook and expands to drink a looper to grip it with a needle. The needle enters the mouth between the hook and the expander in the loop, the shape of the looper thread. Next, the needle pierces the stitched fabric, taken out by the extruder. The looper, moving in the direction of the operator, resets the needle loop to drink the looper.

The expander goes to the hook, and the looper goes to the right side of the needle

plates for grabbing the next net needles. The needle pierces the fabric, a needle thread is formed, and the whole process repeats from the beginning.

Subject invention

A looper for making a hidden double thread chain stitch, consisting of a hook fixed in the looper stem, and an expander, characterized in that, in order to obtain a reliable grip loop of the looper with a needle, the extender is provided with a fork to hold and expand the looper thread, spring-loaded and hingedly strengthened a hook that has a thread guide and a hole for threading it into it.

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