SU111708A1 - Adaptation to a round knitting machine to turn off its press and turn on scissors when the thread is broken and tightened - Google Patents

Description

There are known devices for a round knitting machine to turn off its press and turn on scissors when the thread is broken and tightened, provided with a latch holding the moving part of the press stem, an electromagnet to release the latch, contacts to turn on the electromagnet held by the thread with a comb releasing the thread loop with a lever interacting with the press latch, and scissors kinematically connected with the movable part of the press.

The described device has the difference that, in order to increase the sensitivity of its work, the contacts are made interacting with the comb when the thread is broken, and the latch is made in the form of a clamp locking the tooth on the movable bushing of the press plate. To break the power supply circuit of the electromagnet after turning off the press in the power supply circuit of this electromagnet Included are normally open contacts, locked by a finger attached to the movable bushing of the press stem, with the press position turned on and openable when it is turned off.

In order to signal the shutdown of the press, it used a signal light, lit when the contacts are closed.

FIG. 1 shows a general view of the described fixture mounted on one of the sewing systems of a round knitting machine; in fig. 2 is a side view of a comb with contacts; in fig. 3 - section along the press stem latch; in fig. 4 - wiring diagram.

The fixture consists of a latch of a press bar, an electromagnet for releasing the latch, a comb with contacts, a tightening lever and an electrical circuit with a signal lamp and a rectifier.

On the lower part / round knitting machine, by means of the bar 2, an unbalanced comb 4, rotatably mounted on axis 5, and an insulated contact 6, which is closed by a comb when the thread breaks, are retained by the thread 5.

In the lower part of the glass 7 of the press 8 is installed on the axis 9 of the press latch 10 in the form of a bracket locking the tooth 11 attached to the slide. -No 111708 bushing 12 of the press stem 13, and an electromagnet 14 interacting with the latch 10. The electromagnet is activated by the contacts 6 of the comb. On the axis 15 of the press cup, a clamp 17 lever supported by the spring 16 is set, which pulls the thread loop 3 and cooperates by means of the transfer lever 19 mounted on the axis 18 with the press latch 10. The press rod 13 via a lever transmission (not shown) includes spring-loaded scissors 20 cutting the second thread 21 when the first thread 3 is broken or tightened. To open the power supply circuit of the electromagnet 14 after turning off the press, normally open contacts 22 are turned on in the power supply circuit of this electromagnet locked with a forked finger 23 attached to the tooth // on the movable hub of the press stem when it is turned on and open when the tooth moves in the direction of arrow A when the press is turned off. The fork 23, after turning off the press, interacts with one of the pens of the contacts 22, including the power supply of the light bulb 24 mounted on the column 25 of the machine. The electrical circuit of the device is powered through a transformer 26 by a selenium rectifier 27 with smoothing ripple of the rectifier current capacitors 28 and a choke 29. The operation of the device proceeds as follows. When the thread 3 is broken, the comb 4 held by it falls and closes contact 6. The contact turns on the electromagnet 14, which attracts the latch 10- The latch releases the tooth // attached to the movable sleeve 12 of the blade 13 of the press 8, rejecting it from the machine needles, thereby preventing the reset from the needles of the produced web or the formation of holes in it. After turning off the press, the normally open contacts 22 turn off the power of the electromagnet 14; at the same time, the forked pin 23 turns on the power of the signal lamp 24. When the yarn is tightened, the tightening lever 17 by means of the transfer lever 19 releases the latch 10, as a result of which the press is turned off and the signal light turns on. At the same time, by means of a lever transfer, the press jaw 13 activates scissors 20, cutting the second thread 21. Object of the invention 1. An attachment to a round knitting machine for turning off its press and turning on the scissors when the thread is broken and tightened, provided with a latch holding the movable part of the press stem, an electromagnet to release the latch; contacts to turn on the electromagnet held by the thread with a comb, the thread pulling lever that interacts with the press latch, and scissors are kinematically connected bubbled with a movable part of the press, characterized in that, in order to increase the sensitivity of its operation, contacts formed with combs cooperating with the yarn breakage, and the latch is designed as a bracket, the locking tooth on the movable sleeve schtoka press. 2. The form of the device according to claim 1, characterized in that to open the power supply circuit of the electromagnet after turning off the press, normally open contacts are included in the power supply circuit of the electromagnet, which are closed by a finger attached to the movable sleeve of the press stem when it is turned on.

3. The form of the device according to claim 1, characterized in that, in order to signal the shutdown of the press, a signal lamp is used in it that is lit when the contacts are closed.