SU711205A1 - Device for trimming needle and looper threads in sewing machine - Google Patents

Description

FIELD OF THE INVENTION iioro machi1 acute1 1-; and, in part, to the device5 for trimming the threads of the gn and the loops on the sewing machines with a kachaika looper in the aa line stitch.

HasecTFio arranges Yu .al for trimming needle threads and sewing sewing loops .. and: for us, containing sewing machines stopped under the needle plate ((OW the movable and fixed knives, the movable knife drive and pulley for his wrench 1.

The lack of familiarity of the weather is that at the time of trimming the looper, making transverse lines of movement, is retracted from the sewing zone using an additional mechanism, which means that it complicates the design of the manshna and its adjustment.

The purpose of the invention is to improve the reliability of the device.

This is achieved by the fact that the drive movement of the south knife has a sharper setting; an upper needle guide and a crank connected to the loop of the loop shaft, while the movable knife is at one end of the clamp); It is located in the direction of;

The tool for turning off the movable .1l has a latch associated with the shaft of the single turn motor with the latch connected with the latch by means of a spring-loaded lever, and the tool is equipped with a lock lever, equipped with electrons tfiiHHT 1 jaws, one of which The case is Bii. Kefi, and the RTOpon is spring-loaded and connected to the E. ectro..a1nitom.

On fng. 1 shows a device, view cBep.xv; in fig. 2 is a view along arrow L of FIG. ; in fig. 3 - section BB of FIG. one; in fig. 4 - section B - B of FIG. 3; in fig. 5 shows a section of GGD FIG. four; in fig. 6-8 - scheme of trimming the threads of the needle and loop of the body.

The device for trimming the needle and looper H1 of the sewing machine contains 2 movable 2 and 3 non-sliding knives under the needle plate, 3 blades driven by: a single knife, including a vertical W 4 4. Shaft 4 half turns from shaft 5 through a pair of gear cogs 6 and 7. The rolling cutter 2 has inapniruly installed under the imitation of the plate on the axis in the Krg. Search for more than 9 N ifplayed if) and) 1 || I1:,: {chmti, galom 12 looper 3, And (: 1 point; n (liim vr; 1ceiio from the main pall of megshi-shk iri V-TOM 11o; 1c to 1.

knife 2 at one end .iflKptil. ((H; i K) HBO Uiunc 11 with a pin 4, and the other cockpit p 13MOUICH in the straight pin 10.

 Petlnsl 3 1K) L kachala movement from gear 15 through 16 and 17.

The tool for switching the sliding knife has a latch 18 connected to the shaft of the looper 2, a one-turn clutch with a pawl 19, consisting of gear-disk 20 and disk 21, and a parasitic gear 22,

The one-turn clutch is connected to the latch 18 by means of a spring 24 lever 23.

The control means of the retainer 18 has an electromagnet 25 and the cams 26 and 27, one of which is 27 n-motion, and e) the other 26 is spring-loaded and spring 28 connected with the electromagnet 25.

Dog 19 interacts with spring loaded spring 29 dog 30 and pin () volume 31. Spring 32 is used to lock the strand during the cutting.

The device works in a way.

Shaft 12 receives rotation from r aniioro of the machine shaft (noKa: iai in the drawing). Gear 15, on shaft 12, communicates the swinging movement to the Pslitlitol i3 cheroz link 16 and 17 and the driver's movement to the leading gear-disk 20 through the start gear 22. The gear-disk 20, yincic 21 with spring-loaded dogs 30 i; 19 in their combination represent a one-turn clutch, controlled by the lever 24 and allowing the mobile to engage: stand at the right moment.

A gear 18 is installed on gear 15. A latch 18, which can set two positions and control from two cams 26- and 27, while the cam 26 lowers the engine when the electromagnet 25 is turned on and becomes in the path of the latch 18, pushing it out.

When the gear 15 is rotated, the latch 18 (FIG. 1), when approaching the lever 24, presses it and disengages from the pawl 30. Under the action of the spring 29, the pawl 19 sinks into the hollow of the gear-disk 20 and turns the pawl 30 to the thrust plate 3. As a result, the gear-disk 20 with the disk 21 occurs. The shaft 5, having received rotation, passes through the bevel gears 6 and 7, the failure of the vertical shaft 4 and the crank 11.

The movable knife 2, which is fixed on crank 11, is reciprocating, turning around axis 8, At. what the teeth of the knife move

according to the connecting rod curve, igstpein () and c with d and “all those who go around,) em: first line and drink looped n). This | (x, knife 2 when returning the movement of teeth 2c to enter exactly R loop, obrpzgiguyu yoke.; 1st thread, tooth 2a to securely lock the looper. Then movable knife 2 brings them to a fixed knife.

When the cutting edges of the movable yuzh 2 and the stationary knife 3 are cut, the thread is cut, the needle drink is cut first, and then the looper thread, one end of which remains occupied by a single spring 32. The cut is done when the needle leaves the material and the splitter 13 occupies the extreme right position. The signal on the trimming unit comes from an electromagnet 25, which, in turn, generates a signal from a sensor mounted on the shaft of the man- ual). In the current position (not shown), the latch 18 is returned: cam 27.

Since cri1; o1ip i 1 gains speed

i 2 times as large as the main shaft, then the full cutting cycle is performed

for half a turn of the main.

stop it

Due to the fact that the drive of the looper p ppiod 1i;) dg of the cutting knife is inspected

from ueviCpHis-K)) iiB vui; iu, obspech -; tsyatsi: ads; K1gai C1} the device's operation, iotn) oh ps.chyuyugsn chty and lici.shte.g. At this crawl vochmonogz trimming threads ig.ly i-i without stopping the machine

s. going. dims gude pr ..; (; 1m.chg) th lamcon of1. A device for trimming the needle and looper 1sei1 OY Maiiiifibi, containing a set, e under the needle plate of the shawl. Padvy for and non-fang knives, the drive of the movable and adaptable for its inclusion, characterized in that, in order to increase the reliability of the work, the drive of the movable knife has a hinge direction and a crank connected to the shaft of the looper that is hinged under the needle plate. the knife is fixed at one end to the crank, while the other is placed in the direction of the knife.

2. The device according to G. 1. characterized by the heme, that the device for turning on the movable arm and has a retainer connected to the looper shaft, a one-turn clutch with a pawl, connected to the retainer by means of the spindle arm, arm

die shchsmiy (rikg; then () m, have j.) aM .irifHT and cups, one ich of which ficrio / ipizhei, and UTOIJOH is spring-loaded and removed from the electromagnet) m.

Information sources. G1) and thousand in attention during the examination 1. JauHT FRG NO 1485276, cl. 52 of 38/02. 1968

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Claims (2)

Claim 1. A device for cutting the threads of the needle and looper of the sewing machine, comprising movable and fixed knives mounted under the needle plate of the sewing machine, a movable blade drive and a device for turning it on, characterized in that, in order to increase the reliability of operation, the movable knife drive has a hinge a guide installed under the needle plate and a crank connected to the looper shaft, while the movable knife is fixed at one end on the crank and the other placed in the guide. 2. The device according to g !. 1. characterized in that the device for turning on the movable knife has a latch connected to the looper shaft, a one-turn clutch with a dog connected to the latch by means of a spring-loaded lever, and means s