DE7822315U1 - DEVICE FOR DETECTING A THREAD OR BREAKDOWN IN A TEXTILE MACHINE - Google Patents

Description

Device for detecting a thread or roving break in a textile machine

The innovation relates to a device for detecting a thread or roving break in a textile machine, in which the broken thread or the roving is captured by the suction flow of a suction nozzle and drawn into a suction channel is where the presence of the thread or the fuse is detected by electro-optical means.

Devices of the type mentioned are known in which rakes are arranged in the suction channel, which capture the thread or the sliver that has been drawn into the suction channel. In the area of the ends of the prongs of the rake is a light source on one side of the canal and a light-sensitive one on the other side Component arranged. The light beam between the light source and the component is interrupted if a A thread or a fuse gets stuck on the rake. As soon as the light beam is interrupted, the tines swivel

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7677/325 / Ch / Gr - 3 - July 25, 1978

of the rake in the direction of the axis of the suction channel, WO \ with the thread or the fuse slip off the rake. I.

At the same time, when the light beam is interrupted, \

the textile machine stopped. When commissioning the rake swings back to its normal position.

The use of mechanical, pivotable components makes the device complex. Also is it is not ensured that the thread or slotted parts detected by the rake also interrupt the light beam with certainty. Furthermore, it is not guaranteed that when the rake is swiveled in the direction of the channel axis, the parts of the thread or the rake detected by the rake also slip away from this with certainty, which means that after commissioning the textile machine and after When the rake is swiveled into its normal position, the parts stuck on the rake can in turn interrupt the light beam, which leads to an unjustified interruption in the operation of the textile machine.

The object is therefore to design the device in such a way that mechanically moving parts are omitted a reliable gripping of sucked thread or sliver parts is possible.

This problem is solved with the features of claim 1.

An exemplary embodiment is shown in the drawing, wherein in

Fig. 1 shows the device in side view and in Fig. 2 in plan view.

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7677/325 / Ch / Gr - 4 - July 25, 1978

Part 1 is a filter box connected to a suction fan, a suction channel 2 goes from this filter box rectangular cross-section, to which one or more suction pipes 3 are connected, each in a wide suction nozzle 4 open. These suction nozzles 4 load. can be found in the area of the threads or fuses, which from run out of a drafting system past the nozzles 4.

In the suction channel 2 in front of the filter box 1, a so-called light curtain 5 is inserted, which covers the entire cross section of channel 2 occupies. This light curtain consists of at least one light source 6, reflection mirrors 7 on at least two opposite sides of the rectangular channel 2 and at least one light-sensitive Component 8 at a corner of the channel 2. The light beam emanating from the light source 6 is strongly focused and is reflected several times by the mirror 7 until it strikes the light-sensitive component 8 in a focused manner. In this way, an almost complete picture is created Illuminated cross-sectional field, with the light beam between the light source 6 and the light-sensitive component 8 being interrupted when a thread or a fuse enters this field, whereby an electrical signal is generated which leads to the shutdown of the textile machine.

7822315 09.1178

Claims (1)

Dipl.-Ing. β β it β Λ β RolfCharrier Patent attorney Rehlingenstrasse 8 P.O. Box 260 D-8900 Augsburg 31 Telephone 0821/36015 + 36016 Telex 53 3 275 Postal checking account: Munich No. 154789-801 Ernst Jacobi & Co. KG 7677/325 / Ch / Gr Augsburg, July 25, 1978 Claim to protection Device for detecting a thread or roving break in a textile machine, in which the broken thread or the fuse detected by the suction flow of a suction nozzle and is drawn into a suction channel where the presence of the Thread or the fuse is detected electro-optically], characterized in that im Suction channel in front of the filter box a light curtain is arranged which occupies the entire cross section of the channel and which consists of at least one light source, reflecting mirrors on at least two opposite sides of the rectangular cross section and at least one light-sensitive component at one corner of the channel.