SU113300A1 - Electric self-stopping knitting machines with tongue needles - Google Patents

Description

Known electric self-knitting knitting machines with tongue-and-needle needles, equipped with lockable threads and electric contacts, included in an electronic circuit with a relay and contactors, controlling switching off, for example, a driving motor and turning on signal lamps.

These self-stops ensure that the drive of the machine is turned off when the threads break, but they do not turn them off when the web or product is broken, the needle hooks are broken, their tabs are bent, the loop on the needle is broken, and the thread is skipped.

In the electric self-stopping, according to the invention, with-the-sword; the second drawback is eliminated by the fact that one of the electrical contacts is made stationary in the form of an insulated metal plate with a rounded contour, and the needle tongue occupying the wrong position during the conclusion caused by the marked defects.

FIG. 1 shows a side view of a tongue needle of a knitted fabric and a fixed contact plate; in fig. 2 - view of the needles and the movable contact plate in plan; in fig. 3 - a circuit diagram of a self-stopping machine.

One of the electrical contacts of the self-stopping device is made in the form of an insulated gasket 1 of a metal fixed plate 2, to which an adventure cable is soldered to an electrical circuit, and a pin 5 of needles 4, which occupies the wrong position during the process of insertion, is used as a movable contact. The incorrect position of the 5-needle tongue, in which it briefly touches the flat no. 113300

Article 2, occurs because of a thread breakage or its descent, breakdown of the product or web, breakage of needle hooks, bending of their tabs, break of a loop on the needle, or the needle passing the thread.

The contacts 5, when they are closed, increase the potential on the cold cathode control electrode of the thyratron 6, the consequence of which this thyratron ignites and remains ignited after the contacts are broken.

The anode current of the thyratron 6 actuates a relay 7, which opens its normally closed contact 8 and turns off the drive motor contactor 9. Disconnecting the contactor breaks the cathode circuit of the thyratron.

The capacitor 10 is designed to stabilize the operation of the circuitry, the diode // to supply the thyratron with direct current, the resistances 12, 13, 14 and 15 to maintain the corresponding parameters of the current in the circuitry.

The circuit is powered by alternating current through a transformer 16. The circuit includes signal lights 17 and 18, a switch 19 for disconnecting the contacts 5 when they can be closed according to the production technology, the starting button 20 of the contactor and the button 21 for manually stopping.

The number 22 denotes the normally open contacts of the contactor and the number 23 is normally closed.

The dotted line diagram shows the option of turning on the contactor 9 to the non-wired network. and the dash-dotted line is a variant of connecting an electromagnet 24 that, when a normally open contact of relay 25 is closed, mechanically disengages the drive of the machine, for example, by disengaging the clutch (not shown) or moving the drive belt without turning off the electrical switch itself.

Due to the power supply of the contacts with 5 microcurrents, the maintenance of the electric shutdown is safe.

The action of the described self-stopping takes place as follows. For example, when the thread is broken, the tongue 3 of the needle takes in the process of conclusion the incorrect polishing, as shown in Fig. 1 with a dotted line, and for the time being concerned an insulated contact plate 2.

Due to the closure of this contact plate on the mass of the machine body, the potential at the control electrode of the thyratron 5 in the self-stopping electrical circuit increases, causing ignition of this T1 rathron.

A relay 7 connected to the anode circuit of the thyratron opens the contacts 8 and by means of the contactor 9 switches off the drive motor of the machine or turns on the electromagnet 24, which turns off, for example, the clutch in the drive without turning off the motor.

Subject invention

Electric self-stopping knitwear with tongue-and-needle needles, fitted with electrical contacts, which are closed when the threads break, and included in the electronic circuit with relays and contactors, controlling the switching off of, for example, a driving motor and switching on signal lamps, in order to turn off the machine drive when the web or product is broken, the needle hooks break, their tabs are bent, the loop on the needle is broken, and the thread is skipped, one of the electrical contacts is fixed in the form of an isolated a metal plate with a rounded contour, and a needle tongue was used as a movable contact.

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