DE3050149A1 - Weft thread storage device for weaving machines - Google Patents

Description

I 3050U9

T.566b / Bk / mm

Sulzer Brothers Aktiengesellschaft, Winterthur / Schwelζ

Weft thread spoon device for weaving machines

The invention relates to a weft thread storage device for Weaving machines, with a thread driver with thread guide for depositing the weft thread in the form of a loop on at least one Part of the outer circumference of a thread carrier.

A known device of this type (AT-PS 247 810) has the disadvantage that the storage and depletion of the loop takes place by a swivel mechanism, which at today's high machine speeds to strong alternating loads of the machine parts concerned. The storage is initiated by removing the loop from the swivel mechanism The friction and stretching loads on the yarn are high here.

The invention is based on the object of a weft thread storage device of the type defined at the beginning, in which the stress on the mechanical parts and the yarn is only low According to the invention are to solve this problem in the characterizing Part of claim 1 specified design features provided; the subclaims relate to advantageous developments.

In addition to solving the problem posed, the device also offers the advantage that the loops can be unstored by a small stroke, e.g. 5. that of the armature of an electromagnet is initiated. The point in time at which the storage is removed and thus the storage length can thus be controlled in a simple manner.

An exemplary embodiment of the subject matter of the invention is shown below described with reference to the drawing. The single figure of the drawing shows a weft thread storage device according to FIG Invention in perspective.

The thread store has a thread driver in the form of an angled one Air tube 92 which is rotatable about a longitudinal axis 93. The thread 94 transported through the air tube 92 becomes after leaving the mouth 95, which is to be understood here as a thread guide, on the circumference of a thread carrier in the form of a drum 96 stored as a loop 97 with two legs 98 and 99. The loop 97 is prevented from sliding off the drum 96 by a pin 100 which is the armature of an electromagnet 101. The free end of the thread 94 runs through an entry nozzle 102 to the (not shown) shed. When the electromagnet 101 is excited, the pin 100 is raised so that the loop 97 is released and first the leg 99 is entered by the entry nozzle 102, followed by the leg 98 of the smart fe. To form the next loop, the electromagnet 101 is de-energized so that the pin 100 rests on the drum again and holds the beginning of the loop.

Although the movement of the pen 100 to initiate the development Storage of the loop is described here as being caused by an electromagnet, the pen can of course also to others, e.g. B. mechanical or pneumatic way.

Furthermore, although the subject matter of the invention has been described here for a loom with air intake, it is also suitable for other looms, e.g. B. for a gripper projectile weaving machine

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Claims (1)

Claims 1. Weft thread storage device for weaving machines, with a thread driver with thread guide for depositing the weft thread in the form of a loop on at least part of the outer circumference of a thread carrier and a release device for releasing the loop for unloading, characterized in that the thread carrier is designed as a drum (96) and the release device (100, 101) has a body (100) which is positioned between a position against the drum, in which the beginning of the loop (97) is prevented from sliding off the drum, and a position raised from the drum, in which the loop is released for depletion, is controllable . 2. Device according to claim 1, characterized in that the body (100) is the armature of an electromagnet (101).