DE2411607A1 - SUCTION DEVICE ABLE TO COLLECT THREAD FOR CONTROLLING A FEED SOURCE - Google Patents

Description

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899 Lindau (Lake Constance)

Rennerle 10 P.O. Box 3160

March 6, 1974

Gfficine Savio S.P.A.

Uia Udine - I 33170 Pordenone / ltalisn

Suction device capable of collecting yarn, for controlling a supply source

The present invention relates to a suction device capable of collecting yarn for controlling a supply source; In particular, the invention is concerned with an improvement in a rotating suction cylinder which enables the feed rate of an existing source above the cylinder itself to be linked to the length of the yarn present in the cylinder _{or the like}

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Suction cylinders are known which consist of a hollow cylinder with holes in it to ujobei the suction in the holes takes place; the use of such cylinders in the processing of natural or synthetic yarns is known and the supply of yarn therein, which collects on the rotating cylinder, acts as a flywheel between a supply source and a point of application,

The device which is the subject of the present Invention is, creates rotating suction cylinders with further new, useful features.

The first useful feature resides in the fact that by scanning the supply on the rotating cylinder it is possible to obtain signals indicating the Conditional supply speed by the source attached above the device.

Another useful feature is the fact that it is possible with the same signal to determine the speed of rotation of the cylinder itself.

Furthermore, according to a variant, it is possible to arrange an additional scanning device which will emit a signal, to close off the application site when the stock deposited on the rotating cylinder falls below one

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certain permitted minimum amount decreases.

It is also possible according to another variant, additional To arrange scanners which will emit a signal to shut off the supply source when the on the Rotating cylinder deposited supply has reached a maximum allowable value.

Another advantage of the present invention is that it is located in place of a single scanner © des Stock to provide two scans on the cylinder · at a preset distance from the delivery of signals are carried out which tend to keep the size of the normal supply within such limits.

According to a further improved version, it is also possible check the amount of thread on the cylinder by checking the peel angle of the yarn from the cylinder, whereby it is also possible under this last version, the construction of the suction cylinder to simplify.

These useful features along with other new, useful benefits and advantages are therefore achieved as will be seen from the description below, by a suction device that is suitable and capable

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will be to collect yarn, to control a feed source, whereby the device has a feed and coil assembly sets up, which operates in cooperation with a rotating suction cylinder and is characterized in that it has at least one device for sensing the presence of yarn, the sensing device with the Feeding and Abuiickelordnung cooperates and also with the rotor assembly of the rotating suction cylinder to keep the supply of yarn within two preset amounts to keep.

The invention will now be described with reference to some non-limiting embodiments which are shown in the accompanying drawing are given as examples.

It shows:

1 shows a device according to the invention;

FIG. 2 shows a variant of the device from FIG. 1;

3 shows a variant of the device from FIG

₀ 4 is a sectional view of the cylinder of FIGS. 2 and ₃₀

The figures show the same parts or parts with

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the same functions are given the same reference numerals.

With regard to the figures of the drawing, the yarn 10, the whereupon a feed source comes and through the feed rollers 11 in an informal manner on the cylinder with Holes 12 are deposited and thus a supply 13 is created between the feed rollers 11 and the point of use 14, the point of use being represented here in a schematic and artificial way by the unwinding rollers is because it can take many different forms.

The cylinder with the holes 12 in it rotates in the direction 15 and its suction is provided by the lower bearing produced, in which a suction is carried out in the direction 17 by the suction device 27, which by the Motor 28 is put into operation.

According to the first illustrated solution, the supply 13 only checked by a device in order to scan the yarn present there, the scanning device thus a The inspection point and a photocell 18 exists, which is only put into operation by the light source 19 when the supply 13 to such an extent goes back that it no longer interrupts the light beam which divides the surface 29 of the cylinder and afterwards runs on it.

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Although the existing on the hole thread 12 of the cylinder Supply also extends below the light beam coming from the light source 19 and the surface of the Cylinder touches, there is no intervention according to the invention; however, if the supply 13 is to such an extent goes back to be spread out only in the area above the light beam, then the photocell 18 appears put into operation and emits a signal which acts on the motor 22 via an electrical circuit of a type which is known and is therefore not shown here and thus accelerates the feed roller 11 until the supply extends again to below the light beam and interrupts it. The emitted signal can ZoB. in a mid-speed electric motor, a low one Achieving speed instead of high speed or vice versa.

Different variants are possible; thus the light source 19 and the photocell 18 of the inspection point be replaced by an air nozzle or microcontact that is able to check the presence of the yarn and to scan its width.

Again, there could be two or more verification sites instead of just one 18-19, as shown here

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In such a case it would be possible to carry out a verification place close to edge 20 to check that an excessive supply on the cylinder has not been created is.

It would also be possible to place two locations (see Fig. 2) at a suitable distance from each other are arranged to keep the supply 13 within the maximum and minimum amounts in the space between the location 18-19 of the lowest level and the position 25-26 of the highest level are included.

It would also be possible to set up a review body closely to be placed at the point of arrival of the yarn 10 on the drum, to check that the supplies have the slightest degree of certainty not fall below the heat level. For further improvement of the invention since the devices contemplated herein need a drum that is well rectified and on top of it If the axis is well centered, a verification point could be provided be to feel the position of the yarn where it is withdrawn at 21.

When this happens, there is no longer any need for the cylinder to be precisely machined _o According to

of the invention is an apparatus improved in this way shown in Fig. 3. The yarn take-off 21 runs therein

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Before continuing to the exit point 14 with a Ring 30. This ring 30 requires an angle ex des Unwinding, which supports the area of changing the stock. This angle α is determined by two scanning devices checked, and in Fig. 3 from two groups exist, namely 18-19 and 25-26, which are influenced by the yarn and the latter the limits of the kink cX is reached, the limits being indicated as 34 and 35.

If the yarn is unwound at 21, it moves faster than its feed, the take-off point of the supply 13 moves backwards and the yarn take-off '21 runs outside the limit 34 of the angle CK and this is canceled by the scanner 18-19 Result on and increase the speed of the feed source. The scanner also increases the speed of the rotor 24. If, conversely, the yarn draw-off 21 runs beyond the limit 35, the scanner 25-26 can increase the draw-off speed of the point of use by acting on the rotor 23; it could also act on motors 24 and 22 and slow them down.

An improved cylinder suitable for the purpose is that shown in FIGS. 2-4. This shows that the Cylinder, which is received by the Uielle 31, due to the housing 32 through only on part of its circumference

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Suction is influenced. This housing 32 produces the required sealing with the felts 33, uielche on the Cylinder slide.

Some preferred designs of the suction device are described here, but other designs are possible, without departing from the essence of the invention. Thus it is possible to change the shape and dimensions of the cylinder that The number and type of scanners, the type of supply source and the type of dissipation point can be modified without this u to deviate from the essence and scope of the invention.

Claims

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Claims (1)

Claims y Suction device capable of collecting yarn and is suitable for controlling a feed source, the apparatus providing a feed assembly and an unwind assembly, which works in cooperation with a rotating suction cylinder and is characterized by it is that it has at least one device (18-19 or 25-26) to detect the presence of yarn to be scanned and with the feed arrangement (11) and the unwinding arrangement (14) and also with the motor (24) of the rotating suction cylinder to work together to keep the supply (13) υοη twine between two set amounts too keep. 2 _O suction device according to claim 1, characterized in that the devices (18-19 / 25-26) for sensing the presence of yarn on the surface of the suction cylinder cooperate with the holes (12) and along the generating longitudinal line of the suction cylinder. 3. suction device according to claim 1, characterized in that the devices (18-19 / 25-26) for sensing the presence of twine with the twine take-off (21) at the boundaries (34-35) of the U / angle (£ *) 409839/0718 - 11 - work together, which bedeqkt the expansion of the supply (13) of yarn. 4. Suction device according to claim 1 and one of the preceding Claims, characterized in that the devices (18-19) for scanning the smallest extension of the 1 / orrate (13) of yarn with the The rotor assembly (22-23-24) is essentially connected to increase the supply (13) of yarn while the device is being operated (25-26) for scanning the greatest extent of the supply (13) of yarn with the fflotor arrangement (22-23-24) connected to reduce the supply (13) of yarn, 5o suction device according to claim 1 and one of the preceding Claims, characterized in that the motor arrangement (22-23-24) has two-speed electric motors are. 6. Suction device according to claim 1 and one of the preceding claims, characterized in that that the scanning devices (18-19 / 25-26) consist of a light source (18-25) and a photocell (19-26) «, 7. Suction device according to claim 1 and one of the preceding Claims to claim 5, characterized characterized in that the scanning devices 4 0 9 8 3 9/0718 - 12 - (18-19 / 25-26) consist of an air device around the To feel the proximity. 8. suction device according to 'claim 1 and one of the preceding Claims to claim 5, characterized in that the scanning devices (18-19 / 25-26) consist of a microswitch. 409833/0718