DE2037576A1 - Device to prevent Schhn gene formations - Google Patents

Description

'PATENT ADVOCATE

Dipl.-Phys. dr. WALTHER JUNIUS 3 Hanover

ABBESTRASSE 20 TELEPHONE Ϊ3 45 30

July 26th, 197o My files: 1898

ELITEX, Zavody textilniho strojirenstvi, generälnl reditelstvl, L i b e r e 0 (Czechoslovakia)

Device for preventing loops from forming

The invention relates to a device for prevention of loop formation when thread unwinding from bobbins, especially when the thread unwinding is interrupted, e.g. while shuttle knitting a heel or toe of hosiery and the like on a knitting machine, wherein a Base body with a hyperboloidally shaped work surface is arranged coaxially with the sleeve of a coil and the unwound thread runs between this work surface and a ring.

Numerous devices of this type have been proposed, which were arranged in the immediate vicinity of the coils and to prevent sole formation should serve.

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For example, a "device is known which consists of a ribbon of fabric consists, which wraps around the coil surface at two opposite points, with fabric tape and Coil are arranged in a transparent cylindrical housing.

A device has also already been proposed two brake disks arranged above the bobbin, between which the unwinding thread passes later to be guided over a loosely rotatable roller so that the thread remains in the tensioned state «

Another known device is designed in such a way that a body is attached to a spool, -on the outer circumference of which a ring is loosely placed, with the thread passes between the body and the ring.

One of the newest devices of this type consists of a two-part body, which is joined with a hyperboloidal shape Working surface is provided on which a ring rests loosely, the thread when unwinding from one Coil is also passed between the work surface and the ring.

The listed devices usually have the disadvantage that they prevent the formation of loops only in the part of the coil which is wrapped around it. Most of the time they are complicated and demanding to use.

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ORIGINAL INSPECTED

The invention avoids these disadvantages.

The invention is based on a device in which a base body with a hyperboloidally shaped work surface is arranged coaxially with the sleeve of a coil and the unwound thread passes between this working surface and a ring.

The invention consists in that the working surface of the base body is at least terminated with a stepped part is, the diameter of which is smaller than the inner diameter of the ring, and that the stepped part with a support surface and / or with another hyperboloidal Shaped work surface of an additional part completes.

The essence of the invention is illustrated schematically in FIG Exemplary embodiments illustrated in the drawing show in more detail:

Figure 1 is a front view of the first embodiment the device arranged over a bobbin case, which is provided with reserve rings and in which a thread unwound from the bobbin is guided upwards,

FIG. 2 shows a similar front view as in FIG. 1, however with the difference that the device is arranged without reserve rings under the bobbin and a thread unwound from the bobbin is guided downwards,

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_ Ij. _

Figure J5 shows a longitudinal section through the device in disassembled state,

Figure 4 shows a further modified embodiment of the above a bobbin tube arranged device, at which the lower cylindrically stepped part by a further independent additional part is replaced, whose work surface also runs in the form of a hyperboloid »

The device for preventing loop formation can advantageously be made of plastic. The base body 1 with the hyperbolic work surface (Figures 1, 2) expediently consists of an upper part 2 and a lower part J5 The work surface of the base body 1 is designed in the form of a rotational hyperboloid and on one side with a cylindrical shoulder 4 and a support surface 5 completed “At the same time” the other side can also be completed with a cylindrical shoulder 6 and a support surface 7 in the form of a circular ring and the like. Backup rings 8, 9> Io can be slid onto a pin 11 (Figure 3) disposed or _o is completed by which the lower part 3, the pin 11 has such a diameter and such a design that it a in an unillustrated hole Sleeve 12 (Figure 1) can be inserted. Since the base body 1 consists of two independent parts 2, 3, the hyperboloidally shaped work surface is separated by a dividing plane 13, which advantageously lies at the apex of the rotational hyperboloid that is being formed.

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diameter larger than the outer diameter of the cylindrical Paragraph 4 or 6 and its outer diameter is smaller than the outer diameter of the bearing surfaces 5, 7 is «This measure is necessary so that the attached Ring 14 cannot leave the space of the work surface of the base body without external intervention. On the sleeve 12, a spool 15 is formed from a thread 16 according to a known type and design (FIG. 2).

The assembly of the base body 1 from its parts, the separate upper part 2 and lower part 3 (Figure 3), takes place advantageously with the help of a tenon connection. Z-.B. the upper part 2 has a pin 17 which can be pushed into a through hole 18 of the lower part 3 It is advantageous to also design the upper part 2 with a through hole 19, which with a recess 2o can be closed in order to then use the holes 18, 19 for various holding on the machine can.

As can be seen from Figure 4, the device can after the invention, for example, be designed so that on the pin 11 (Figure 3) of the lower part 3 an independent Additional part 21 (Figure 4) is attached, on the hyperboloidally shaped work surface a ring 22 of larger diameter and weight rests loosely · In this In this case, the base body 1 has two planes of division 13 and 23 on · This modified embodiment of the invention Execution enables the largest area of use and a very wide range of different types of oil.

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This meant that a single device according to the invention for different types of yarn - very fine up to coarse yarn - sufficient

The mode of operation of the device is as follows

Depending on the type of yarn to be processed, a suitable ring 8 _fl 9 ^ lo ₅ 14 or 22 can be used, which differs from the others primarily in its weight and diameter. The general principle applies that for a coarser thread to choose a heavier ring »

The ring 14 or 22 rests loosely on the working surface of the base body 1 _o The thread 16 unwinding from the bobbin 15 in the direction of the arrow S (Figure Ij 4) or Sg (Figure 2) is pulled through the aforementioned ring 14 or 22 and further ZoBo to individual _{thread guides #} Fadens tension, or Fadenbruohw.ächtern supplied As is generally known * the thread 16 is usually not unwound from the bobbin 15 at a constant speed reel © "the consequence _s that the thread is l6 alternately tensioned and © s why" when unwinding from the spool 15 easily undesirable to form loops _e comes the ring 14 IbTO ₀ 22 presses the dose ¹ solid thread ± 6, geg @ n di © working surface of the base body 1 Sn ₁ , which may cause unwanted loops that may form. @ rg @ pulled @ n and lh are prevented from moving further ₀

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Claims (1)

Pa t e η t a η s ρ r ü oh e 1. Device for preventing loop formation with the pad unwinding of bobbins, especially when the pad unwinding is interrupted, e.g. during the Pendulum knitting of a heel or toe of hosiery and the like. On a knitting machine, wherein a base body with a hyperboloidally shaped work surface is arranged coaxially with the sleeve of a bobbin and the unwound thread between this Work surface and a ring runs through it, characterized, that the working surface of the base body (1) at least with a cylindrical shoulder (4, 6) is completed, the diameter of which is smaller than that Inside diameter of a ring (14) and the mentioned paragraph (4, 6) with a bearing surface (5 # 7) and / or with a further hyperboloidal shape Closing the work surface of an additional part (21). 2. Device according to claim 1,
characterized, that the hyperboloid-shaped working surface of the base body (1) consists of three or more parts (2, J>, 21) which hold each other together with the help of a dismountable connection. - 8 ■■ - ■ ;. 109809 / U11 Device according to claims 1 and 2, characterized in that that the base body (l) with a through hole (l8, 19) is provided. 4. Device according to claims 1 Ms 3, characterized, that the connection of the individual parts (2, J>, 21) of the base body (1) takes place with the help of a journal bearing » 5. Device according to claims 1 to 4, characterized in that that on a pin (11) of the lower part (3) of the Base body (l) spare rings (8, 9 »Io) are attached, 1 0 9 8 0 9 / U 1 1 L e r s e i t e