SU47617A1 - Tool for cutting the end of the weft thread when changing the spool - Google Patents

Description

The use of movable hook blades for cutting the end of the weft thread when changing spools is widely known on Northrop automatic machines, but the operation of these blades together with the fixed flat does not ensure reliable cutting of the end of the weft thread even with a slight blunting of the cutting blades.

The invention is intended to use a figure-shaped rotary knife to ensure trouble-free operation of the device.

The schematic drawing shows the general arrangement of the parts of the fixture.

The device and operation of the proposed device are as follows. The lever L, which is freely seated on the spindle B, is pulled back to the forward position (to the left in the drawing) by the spring B. The nosal part AA of the lever A consists of two plates with the pin G. fixed in them.

Between the plates AA is placed figure knife L, which sits with its hole on the roll E of the reel and is provided with an slot I, in which pin G. is placed.

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The principle of operation of scissors is as follows. After the spool has been changed in the shuttle and the shuttle has passed into the opposite box, the thread from the spool inserted into the shuttle, being tied to the battery's battery disc, will remain tensioned between the fabric and the cable disc (shown in the drawing G).

When the batana approaches the chest, as the arrow shows, the lever A from the pressure of the body of the bat will rotate on the roller B until the AA nose piece lies on the spin roller and thus, turning the knife D a little forward, seizes the thread Z with hooks.

Further movement of the bat, and therefore of the lever A, will occur by moving lever A to the right, which is why the thread between the plates and the rotating knife will be cut off, and when the blunt knife is broken, the blade plane goes far beyond the nose.

The design feature of the proposed scissors consists in the use of a rotating knife D, as well as in such a design of the nose AA of the lever A, which, being between the two guide spindles B and 3, can easily be advanced further than the place assigned to it in those cases when, for some reason, lever A will be pushed much further than is required by its normal operation.

The subject matter of the invention.

A device for cutting the end of the weft thread when changing the spool using two hook blades actuated by pressing the baton on the lower end thereof, characterized in that the O-ring knob mounted on the roller E of the crochet to cut the weft thread is oscillating pin D, mounted on hook-shaped blades x .A A and entering the slotted And figure knife D.