SU100759A1 - Adaptation to sewing machines for automatic cutting of the upper and lower threads - Google Patents

Description

The subject of the invention is the adaptation to sewing machines for automatic cutting of the upper and "upper threads above the needle plate.

The proposed device has a simple structure. Oio is made in the form of a charging mechanism ukreilennogo on the paw holder, interacting with the impact mechanism and a fixed knife attached to the needle needle.

The loading mechanism consists of a body with an I-hingedly modulated roller lever, a spring-loaded lock with a tooth locking the spring plate of the hammer, and a spring-loaded figured square that interacts with one shelf and a lever roller, and the other with a leaf spring.

On the shelf of the figured square, which installs the lock in the working position, a spring-loaded probe is hinged, which leads the bxxator out of the working position, including the movable knife; at a free end, the probe is equipped with a roller that interacts with stitched parts.

The free end of the lever with the roller is located in the notch of the rolling in the vertical plane of the knife, interacting with the fixed knife. To clamp the movable knife to the fixed case, the loading mechanism is spring-loaded.

FIG. 1 shows a general view of the device; in fig. 2 - view along arrow A “and FIG. one; “And FIG. 3 - movable foot; in fig. 4 - drummer in two projections; in fig. 5 is a plan view of a needle plate with a fixed knife; in fig. 6 shows the position of the lock when the lamellar spring of the hammer is released; in fig. 7 - the position of the shaped square at the time of lowering the movable knife; in fig. 8 - position of individual elements of the device in its working state.

On the rod 1 (Fig. 1) the paw holders of the sewing machine are reinforced with a charging mechanism, having a body 2, and a percussion mechanism is installed on the needle bar, the body 3 of which is fastened with a screw 4 to the needle bar. The drummer 5 is inserted into the groove of this body and rotates freely on the axis 6. The spring 7 holds the drummer in the working position.

In the direction of the housing 2 (Fig. 3) of the charging mechanism is a stirring, a mandrel 8, on which a screw JO is attached to the screw 9; The polishing of the latter is regulated by VIIT. For the return of the scissors to the edge — not the upper position — it serves as a weapon for 12 mounted inside housing 2.

Under the action of an external 13 subbig knife 10, it is pressed against a fixed knife 14 (Fig. 5), closed with a screw 15 in the design of the needle plate 16.

The loading mechanism has a latch 17 (Fig. 6), hingedly LMOH-type: I-1 on the axis 18 and holding its tooth in the working position: a plate bushing 20, clamped by a clamp 19, clamped in the housing groove and predetermined to prevent premature switching of the knife 10. The latch 17 under the action of the spring 21 drops the iodine bracket 19.

Behind the housing 2 of the charging mechanism with screws 22 (Fig. 1) Fork 23 is attached to which lever 24 with roller 25 is attached. Freebie (lever 24 is passed through cutout "-yuzha 10 and serves as a stop for drummer 5 (Fig. 7 ).

On the side of the housing 2 on the axis 26 (Fig. 1), a figured square 27 is pivotally mounted, having two shelves, one of which it interacts with the rollercount 25 of the lever 24, and through the other acts on the bracket 19 of the spring 20.

A small piece of the shaped square 27 on axis 28 (phg. 8) is jointly strengthened with a probe 29, having a roller 30 at one end, interacting with its parts, and iHa another Kojrne fitted with a spring 31.

When the squeezed parts are placed on the table of the H1 machine and the presser foot is lowered, the probe 29, supported by the roller 30 on the surface of the part being closed, partially rotates on the axis 28, while simultaneously rotating on the axis 26 the fs-square goose and rests on the shelf 19 of the spring 20 which moves forward a little and overlaps the lever 24. The latch 17 (Fig. 6), which previously abutted with its tooth on the yoke 19, turns and goes under it, which prevents the spring 20 from taking the initial position.

With the described position of the individual E-Cements, the device is in working condition.

After turning on, the sewing machine begins to sew the parts.

The roller 30 of the probe 29 (Fig. 1) slides across the surface of the part to its edge, and then lowers onto the machine table.

The drummer 5 (Figs. 4 and 7) slides over the plate spring 20 (Fig. 8), without hitting the end of the lever 24, since the depth of the cover 20 overlaps the latter and is kept in the extreme position by the tooth of the lock 17.

Not stopping the machine, not breaking the threads and not extending the legs, begin to sew another part that pushes the probe 29 with its edge (fig. 1) with the hypo 30 1 back to the fastener 17. The probe 29, reaching the clamp 17, turns it around the axis 18.

The latch tooth comes out from under the bracket 19, and the spring 20 releases shock 5 (Fig. 7), which, pads, hits the skin 10. The latter, interacting with the fixed knife 14, cuts the upper and lower threads between the parts.

When lowering the knife 10, the lever 2 with the roller 25 presses the shelf of the figured square 27 (Fig. 8), which, turning, with another pad, raises the bracket 19 from 20.

The latch 17 under the action of the spring 21 drops under the bracket 19, and the probe 29 under the action of the spring 31 occupies the initial position. Fire 10 with lever 24 spring 12 rises, and the corners of the boom 27 spring 32 returns to its original position.

Subject and s about ip e te and and

Claims (5)

1. Adaptation to the sewing machines for automatic cutting of the upper and lower threads above the needle plate, in order to simplify the design, it is made in the form of a charging mechanism, strengthened on the paw holder and interacting with the percussion mechanism. , and a fixed knife attached to the needle plate. 2. The form of execution of the device according to claim 1, characterized by The fact that the charging mechanism consists of a housing with a roller lever mounted on it, a spring-loaded lock with a tooth locking the plate on the impact spring, and a spring-loaded figured square that interacts with one shelf with the lever roller and the other with a part-spring. 3. The form of performance is iridescent. PIA on PP. 1 and 2, that with the fact that on the pulley fngurio uglyapy-1ka, setting the locking device in the working position, the hinge on the reinforced spring-loaded outgoing locking device from the working position and including a sliding fire probe, fitted with at the free end of the roller, interacting with parts that are compressed. 4. Form Performing adaptation pop. 2, characterized in that the free end of the lever with the roller is located in the notch of the movable in the vertical plane of the knife, interacting with the fixed knife. 5. The form made by the device according to claims. 1-4, o t, and that in order to press the movable knife against the fixed one, the case of the charging mechanism is spring-loaded. S 3