DE2329798A1 - METHOD FOR APPLYING A RESERVE DEVELOPMENT DURING SPOOL CHANGES ON A SPINNING MACHINE AND DEVICE FOR PERFORMING THE METHOD - Google Patents

Description

PATENT Attorneys 5 'K O L N 51

MAXTON sr.MAXTON jr. pferdmenqesstr. βο

DIPLOMAIN ENGINEERS 1. June 1973

Applicant: Maschinenfabrik Rieter AG, Winterthur (Switzerland) Designation: Procedure for applying a reserve winding

when changing bobbins on a spinning machine and device for carrying out the process Our reference: 412 pg 733

The present invention relates to a method for Application of a reserve winding when changing the bobbin on a spinning machine and a device for carrying out the process.

The bobbin change on open-end spinning machines is lüsher donon the thread continuously through take-off rollers from the spinning unit pulled off and from an overlying on a drive:; roller has been recorded on the bobbin, made by the support or frame receiving the bobbin together swiveled up full bobbin, the full bobbin unclamped from the carrier, d. H. removed and the one running towards this ! • Viden is severed by hand. So that the hands of the operator then become free for inserting the new empty bobbin case, If the bobbin is deposited on the machine or elsewhere, the free from the spinning device is uninterrupted by the take-off rollers The subsequently delivered end is removed from the traversing system and is usually placed between the take-off rollers and the wind-up point arranged thread suction nozzle, and finally the empty one

309883 / 097.7

Coil inserted. The carrier is then lowered, i.e. H. the sleeve is placed on the drive roller and the thread end as desired thrown onto the sleeve, which, because of its adhesive surface, holds the thread and thus the winding of the new bobbin initiates the traversing after reinsertion.

It has been suggested to do this by hand Automate operation on open-end spinning machines by adding rlio full bobbin automatically lifted, notched, ejected and open a conveyor belt is guided in order to then automatically deliver a new, empty bobbin tube from a magazine into the Insert the coil carrier and bring it into the operating position. That between the drive roller and the newly inserted bobbin case on the one hand and the discarded coil, on the other hand, is longer orgebondu The piece of thread then becomes oclilingen without severing the thread thrown with a blower nozzle onto the empty bobbin tube, which is already under power again, before the winding starts, and the thread will inevitably break when the bobbin is full. Both the manual application and the above-mentioned practically fully automatic However, spool changes have the serious disadvantage that in this way no reserve winding is formed can, d. H. the inner thread end of the bobbin is covered and can no longer be grasped when the bobbin is completely wound. Then is the fully automatic execution is very complicated and expensive, mostly without regulating devices and time relays, which the respective operating conditions

conditions (yarn number, delivery speed, etc.) must not get along.

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The object of the present invention is to use open-end spinning machines by creating a reserve winding when changing the bobbin to create the conditions that be.i one r.pltorcn Processing of the coils, for example on knitting machines Od (T like the free thread end of each bobbin with the thread beginning the subsequent at any time during the Processing can be combined without having to accept business interruptions and excessive waste. Another one The task is to find such a supply in a simple manner produce in which the thread end lying directly on the sleeve is not involved in the actual bobbin winding so that problems in further processing caused by unsuccessful attempts to free the wrapped end be dated.

Furthermore, the separation of the thread between a full bobbin should

the new tube to be inserted and the keservewrap / even with very low thread tension can be carried out safely and cleanly. In addition, any risk of injury should be excluded for the operating personnel. In addition, the energy consumption should remain negligibly small.

In a method for applying an iterative winding to a Bobbin case when changing bobbins on a spinning machine in which a thread continuously withdrawn from a spinning device and after passing a traversing on one of a carrier p.bnohmbaron. "coil sleeve is wound on a drive roller rests, the fully wound bobbin being lifted off the drive roller for bobbin change, stopped and removed from the carrier

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removed and the thread leading to the bobbin cut off and the newly delivered thread placed on an empty tube inserted in the meantime and then wound up, the object according to the invention is achieved in that the thread during the bobbin change in a thread course lying next to the normal chonging area a suction opening is fed that the Tr ^: iger with the inserted empty bobbin tube is lowered in the direction of the drive roller, that the thread is severed shortly before or upon contact of the sleeve with the drive roller and the resulting thread end taken up by the sleeve, held and the subsequently supplied thread as a reserve winding is initially wound next to the normal traversing range and then returns to the normal traversing range to form the normal winding.

There is a device for carrying out the method according to the invention provided, which can be swung up into a rest position and swiveled down into an operating position for a removable carrier Spool tube on v / eist, the spool tube resting on a drive roller in the operating position of the carrier, driven and is wound with traversing. According to the invention is the device characterized in that the pivotable carrier has a thread suction device and a cutting device -. seen in the direction of the thread - the drive roller is assigned, and that the carrier is given away with a switching element, by dns when swiveling down shortly before reaching the operational disturbance the cutting device in readiness for cutting is actuated. * Behind

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i> io invention is explained below with reference to preferred exemplary embodiments, which further features of the invention can be found in more detail. Show it

Fig. 1 is a schematic representation of an open-end spinning machine in outline,

FIG. 2 is a plan view of a wind-up point, FIG. 3 is a section of a suction and cutting device, Fig. A a switching sleeve in development,

5 shows a variant of the device in a perspective view,

6 shows another variant of a part of the device,

en
7 shows a / carrier in plan, FIG. 0 shows a section along line VIII - VIII of FIG. 7, FIG. 9 shows a view of the arm from direction IX of FIG.

Dan Offenond a spinning device 1 supplied staple fiber tape 2 is peeled off from this as a twisted thread 3 by a Abzugswalzenpoar l \ and aufgewickelt- on a spool 5, the loading in

3 09 883/0977

drive position on a drive roller 6 by friction drive rotates. The spinning device is provided with a thread suction device, on whose suction channel 8 a suction nozzle known per se 7 is connected, which is arranged over the take-off rollers 4 and which the thread z. B. absorbs thread breakage.

According to the invention, it opens into the same suction channel 8 of the thread suction device also a suction channel 24, which is connected to a second suction device 9, which according to the invention is a thread cutting device 10 is combined.

The coil 5 is clamped laterally in a two-armed carrier 11, whose arms 12, 13 (Fig. 2) tend resiliently against each other and for bobbin removal or for inserting a .Spulenhülse spread v / earth. The Fade'nabsaug- and cutting device 9, 10 combined according to the invention is as close as possible on the drive roller 6 or on the sleeve 14 in the operating position and is in the vicinity of the vertical pivot plane of the Arm 12 arranged, d. H. it is seen in the running direction of the thread and is roughly aligned with respect to the operating position arranged with an end plane of the inserted bobbin tube 14 on the machine frame.

In front of the drive roller 6 there is a hub area II traversing thread guide 16 and a guide plate 17, the outside of the stroke II has a notch 18 at a distance a into which the thread can be inserted. The notch 18 and the suction and cutting

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Device 9, 10 have opposite the traversing stroke II laterally ctv / a the same distance a. The sleeve 14 used has, in this exemplary ^r 'form guide at the same distance a from H IJormalchangiorboreich an adhesive zone 19, z. B. in the form of a roughening, flocking or in the form of a circumferential depression with notches that take up and hold the thread when changing the bobbin, v / ie is described in more detail below.

The combined Fadcnabsaug- and cutting device 9, 10 gen ^ ß the invention (Fig. J?) Consists of a cutting pin 20, which is axially displaceable and secured against rotation in a housing 21 and by a. Spring 22 is held in an upper suction and cutting readiness position. At the top, or has a recess 23 into which a downwardly extending central suction channel 2 ¹ opens, which supplies the recess ? .J> uit negative pressure from the suction channel θ. A rotatable switching sleeve 25 is installed between two snap rings 26, 27, in the outer surface of which a system of hats 20, 29,;> 0 (i-ig · ^ enlarged and shown in development) is arranged, and in which an i : n housing 21 attached pin 31 engages.

According to the invention, this iiutensysten points in the circumferential direction SchalttiUlae 25 seen two spaced apart Beware 28, J> 0, the length of which corresponds to the stroke of the cutting pin 20 corresponds and which are brought together approximately in a V-shape at their lower end, the upper ends of which are Shorter in its longitudinal extension, also approximately V-shaped connecting groove 29 connected to a self-contained groove system

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.are bound. Due to this design following procedure yields:.. If the cutting pin 20 from the top in FIG ^v> suction position shown pressed down, the Schnlthülse drives 25 With this down and is lead in dor jute 20, in which the pin! ~> 1 moves upwards from position Z relative to the tendon sleeve 25, rotated a little and the pin ~ 1 ro- · reaches relative to the sleeve in position X. This covers the recess 23 and interrupts the suction air flow. ICntf: If the pressure on the cutting pin 20 is now applied, the spring 22 lifts it up against the switching sleeve 25 until the pin 31 comes to rest in position Y, ie the cutting pin 20 remains sunk in the housing 31 to such an extent that according to the invention the recess 23 and thus the suction opening are covered and the suction remains ineffective. Only when the next pressure is applied to the cutting pin 20, with further rotation of the tendon sleeve 25, the pin 31 briefly moves through the groove 29 into a relative position Z ¹ . When the pressure is subsequently stopped, the spring 22 causes the switch sleeve 25 to move up, guided through the groove 30, or the cutting pin 20 to extend completely, with the pin 31 then moving relative to the switch sleeve 25 in the groove 50 leads down and comes back to position Z. The switching sleeve 25 is then again in the starting position, which is shown in FIG. 3. Accordingly, after a first push, the cutting pin 21 does not move so high that the recess 23 becomes free when the pushing force is removed; only a subsequent second push allows it to be fully extended. According to the invention, the procedure is now as follows:

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',.' When the bobbin 5 is full or has reached the desired diameter, it is lifted off the anti-cancer roller 6 by means of a handle on the carrier 11 and the carrier 11 is held in the holed position by a latching mechanism (not shown) (see dash-dotted position in FIG. 1 ). The bobbin 5 is then removed from the carrier 11 by unclamping the bobbin case 14 and placed on the machine, e.g. B. on a conveyor belt, or otherwise set aside ^ after the thread has previously been lifted out of the traversing thread guide 16 by hand and lived in the notch 10 of the thread guide plate 17. The extending to the full bobbin thread v / then IRD by hand to the suction device 9 is brought and collected there, unl is a loop) is being fed, is then carried out the clamping of an empty bobbin 14 in the carrier 11. The lateral spacing a the suction device ^f J ensures that the thread runs to the side of the normal traversing stroke II approximately at a distance a from the notch 18 to the suction device 9. This thread run also falls into the area of the adhesive zone 19 of the sleeve 14. According to the invention, a switching element for actuating the cutting device is now located on the carrier 11 _; Forr.i a PIr. tte 15 arranged, wherein the cutting pin PO is located exactly in the pivoting range of the plate 15, which pivots with the carrier 11.

.. Now the TrMgor 11 with the inserted empty sleeve 14 pivoted downwards again until the plate 15 comes into abutment with the cutting pin 20 for the time being. By further pivoting of the carrier 11, the cutting pin 20 lowers until the Absau £, nut recess 23 is immersed and covered and the

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Cutting pin 20 has reached the lowest operating position of the Triigers 11 in the lowest position (Fig. 1). Due to the shearing action of a razor-sharp upper edge 32 on the housing 21 and the edge 33, the thread, which is only very slightly tensioned by the suction, is securely separated very close to the contact point of the bobbin tube 14 and the resulting advancing short, free thread end in the adhesive zone 19 of the bobbin tube 14 in der.i Woiient brought into connection with this, in that the bobbin tube 14 begins to rotate by resting on the drive roller 6. As a result, the short thread end is taken up on the side of the sleeve 14 by the zone 19 and held in place. By the now following './indungen a thread reserve winding 34 is created, which binds the free end under itself. As the next step, the thread is hooked into the traversing thread guide 16 by hand and the normal winding structure over the stroke K can begin. When the bobbin reaches its desired size, the bobbin changing process begins again.

This method according to the invention not only produces the reserve winding that is very desirable for further processing

Cut off, but formed by the / of the thread near the wind-up point it is ensured that the resulting short thread end does not extend laterally inward from the adhesive zone 19 of the sleeve 14 the reserve winding protrudes into the normal maneuvering area, v / o it could be integrated. This allows the reserve winding 34 slightly different from the

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.iiilr.c 1A stripped off and the tying process with the following Coil can be shortened in the next processing stage. The method has the further advantage that in the case of the cutting and suction device combined according to the invention the suction to avoid unnecessary air loss v: "during the whole coil build-up is set and only is used during the short period of time in which the Operation from spinning rack to spinning station changes the bobbin be undertaken. The combination of suction and cutting device has the further advantage that the very low thread tension, which is also able to generate a weak suction, is sufficient for a safe and clean separation of the To ensure thread.

In the procedure described above, the suction, cutting and the thread catching process on the tube is largely automated, the remaining manipulations are carried out by the operating personnel by: .and executed. However, these processes are alone Crucial for simple operation and the reliable creation of a usable thread reserve winding. Ils exists on the other hand, the Höglicht aas procedure going further to automate, if this is desired and a higher effort is justified.

In the. Embodiment explained below according to FIG. the thread is also lifted out of the traversing and the lateral laying in the area of the ndiiHsivcn zone the .Jpulenhülse automatically as soon as the bobbin is lifted.

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Furthermore, the thread is automatically traversed again returned as soon as the empty bobbin tube is placed on the drive roller. The following is used for this purpose described device:

On the pivot axis 35 of the coil support 36 is a free pivotable lever 39 consisting of two arms 37 and 38 attached, the arm 33 still has an extension 40 on a link 41 is hinged to the other end with the angled linden tree 4-2 one in a holder 43 rotatable Linkage 44 is articulated. At the front end of this Gesttinges 44 this has a thread guide 45, which is now when swiveling up the bobbin 56 by the stop of the arm 37 pivoted on a cross member 46 of the carrier 36 from the dashed horizontal position by a little more than 90 ° clockwise until it remains in an approximately vertical position. On the arm 30 still engages a tension spring 47, which the Resetting of the lever 39 concerned as soon as the cross member 46 when pivoting the carrier 36 a pawl 43 from one to your Arm-attached pin 49 notches, which happens at the moment of the support of the sleeve. Furthermore, a damping device is for the lever 39 50 provided. Behind the thread guide 45 located in the vertical box is a thread guide plate 51 with a inclined inwardly extending thread guide edge 52 attached to the frame.

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ii. in the second, inserted in the arm 38, horizontally in the frame 53 still forward displaceable bracket 54 has a curved front part 55, the outside of the Ilormalf adenlauf it approximately below a traversing and drive roller 56 is in the rest position. As soon If the coil carrier 36 is pivoted up, the bracket 54 hits according to the rotation of the lever 39 forward and lifts the one in Fig. 5 in the position shown in phantom Thread 57 from the hats 5Q of the traversing and drive roller 56 into the position shown in solid lines, in which the thread guide piece 45 can grasp it well. Seen in the direction of the thread Behind the traversing and drive roller 56 there is again a cutting and suction device 59, similar to that of FIG FIG. 4. In this case, the process is carried out as follows; .

When the bobbin 60 is full, the carrier 36 is swiveled up until the cross member 46 swivels the lever 39 and the bracket 54 lifts the thread out of the flute 58, ie out of the traverse. At the same time, the thread is grasped by the thread guide piece 45 pivoting in the vertical and pushed outwards and upwards along the guide edge 52 until the lever 39 comes to a standstill in one end position. Then the thread has reached the position shown in dashed lines in FIG. The full bobbin 60 is now removed by hand from the carrier 36 and the thread is fed to the suction opening 61. Then a new empty sleeve 62 is inserted into the carrier 36 and the latter is lowered again. The thread running into the suction opening 61 and forming a loop in the suction channel 24 or in the channel 8 is shortly before reaching the operating position again

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of the carrier 56 by the combined with the suction device 59 Cutting device (not shown in more detail) close to the empty sleeve 62 or the traversing and drive roller severed. The subsequently supplied free thread end is immediately taken up by the adhesive zone 63 of the empty bobbin 62 and the Formation of the thread reserve winding starts at this point. In the meantime, the thread guide piece 45 and the bracket 54 are also in place by the action of the spring 47 and the damping 50 in the rest position returned. Since the thread is no longer from the suction device 61 in the lateral, the adhesive zone 65 corresponding Position 63 is held in a corresponding position, it strives to create a few reserve turns on the leading edge 52 towards the middle of the sleeve and jumps back into the traverse groove 58, whereupon the normal winding process begins.

On the folded-up full bobbin 60 is the sleeve 62 with the reserve winding produced at the beginning of the winding process 64 visible.

In the event that bobbin tubes without an adhesive zone are used for the thread, a solution can be chosen as a variant of the embodiment shown in FIG. 5. In Fig. 6 is on the left arm 65, on which the broken plate 66 is for the confirmation of the suction and cutting device 59, a plate 67 is provided, which is axially displaceable in the arm 65 and via a lever 68 and a spring 69 accommodated in, clamping position with the sleeve 70 or _x is kept. By a lock 71, the lever 60 is in the non-clamping position

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ment locked (Fig. 6). The thread now runs from the guide piece 45 and dor the leading edge 52 between plate 67 and face the manually held ready sleeve 70. After the Arm 65 has been lowered, the lock.71 is unlocked by hand and the plate 67 comes to rest on the end face of the sleeve 70 (dashed position), whereby the latter is clamped will. The thread is immediately clamped and at the same time by a bracket 72 displaceable with the plate 67 in position moved, in which the reserve turns are to be formed on the sleeve 70. That when inserting the arm 65 in the operating position short separated from the suction and sclineid device 59 As a result, the end of the thread is clamped between the end face of the sleeve 70, ν / ο the thread is clamped, and that fixed by the bracket 72 Position of the resulting reserve winding included.

For the same case (sleeve without adhesive zone) a more extensive automated mechanism can be used:

According to FIG. 7, the coil carrier consists of two coupled arms 73 and 74, known per se, which are resiliently inward tend and to manually insert the empty sleeve 70 are spread so far that the arm 74 on the piston 75 of the suction and cutting device 76 with a nose 77 (FIG. 8) comes to rest. At the same time, the arm 74 is on one support 70 fixed to the frame, which ensures that the arm 74 does not occupy the lowest position. Furthermore, the arm 74 carries the outside another one stored in it that can be swiveled up and down as

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Switching member a lever 79 on which a member 80 is attached on the other side of the arm, which is pivotable in the plane of the arms 73,74. The end of this link 80 engages when the arm 73 is placed on the support 73 and the sojfclic'non stop of the nose 77 on the cutting pin 75 in a slot 81 (FIG. 8) of the same. The arne 73, 74 are internally provided with rotatably mounted plates 82 for receiving the sleeve 70. The thread leading to the full bobbin now runs past the swiveled thread guide piece 45 and the thread guide edge 52 to the suction opening 83 (FIG. 8), namely on the side of the hand-held sleeve 70 to be inserted (see FIG. 7) and on a Height which corresponds to the end face of the sleeve 70 or of the plate 82 when the arm 74 is still supported. If the lever 79 is now pressed down, the cutting pin 75 is lowered, actuated by the link 30, and the thread is cut. As a result, the arm 74 is also released for horizontal inward movement and the sleeve 70 is clamped between the plates 82. The thread lying next to plate 82 and the face of the sleeve is thus clipped. When the clamping is carried out, the arm 73 falls from the support 73 downward into the position shown in dashed lines in FIG. 8 and the empty sleeve 70 comes to rest on the drive roller 56 underneath. In the same ton pushes a reserve hoop 84 the thread on the sleeve 70 until the zone of the bunch winding, which now aes involving short, free end of the filament is created. The pivoting of the thread guide piece 45 into the rest position takes place by disengaging the pawl 48 in the moment in which the sleeve comes open. Then it changes back to normal.

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According to the invention, the cutting device is in one Distance - seen in the direction of the thread - arranged behind the sleeve located in Betrirbsstellung that the in the The short thread end described above, which is produced after cutting by the cutting device, has a length that is a maximum of approximately the circumference of the sleeve is equivalent to.

The formation of a reserve according to the invention is advantageous insofar as untrained peraanal can also work properly perform and also the device can operate and maintain v / egen its simplicity. From the fact that the If the thread reserve is always formed on the same side of the bobbin, there are no difficulties when processing it further When inserting new coils in later processing, the ncservc can always be placed in the same position in all positions and therefore all the resulting thread balloons of bobbins lying next to one another have the same desired direction of rotation during unwinding have, namely the one for which the thread guides are provided.

Above all, however, the short attachment caused by this results in a high level of security in further processing. Even with regard to the sleeve quality, only minor requirements are required put to ground. The described procedure for the formation of rcsorve is also for the most diverse updraft tensions, how they z. B. for weft yarns for V / eb-

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machines on the one hand and dye bobbins on the other become usable. The procedure is very flexible; H. it can be changed manually as well as with a fully automatic bobbin change Use bills of exchange. Since it allows you to work quickly, the waste is very low and so is the air requirement for the suction of the thread loop insignificant.

Expectations

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Claims (1)

- 19th 2329738 1. Method of applying a reserve winding to a spool tube when changing bobbins on a spinning machine, in which a thread is continuously withdrawn from a spinning device and after passing a traversing on a removable from a carrier Spool tube is wound, which rests on a drive roller, with the fully wound bobbin for changing the bobbin lifted off the drive roller, stopped and removed from the carrier and the thread leading to the bobbin cut off and the new one delivered thread is placed on an empty bobbin sleeve ■ which has been inserted in the meantime and is then wound up, characterized in that the thread during the bobbin change * normal traversing yarn path is fed to a suction opening so that the carrier with the empty spool inserted ' lenhülsein direction is lowered to the drive roller that the The thread just before or when the bobbin case comes into contact with the drive roller - seen in the running direction of the thread - severed behind the bobbin case in the operating position and the resulting one The end of the thread is taken up by the tube, held in place and the subsequently supplied thread as a reserve winding next to the normal one Wound traversing area and then returns to the normal traversing area to form the normal winding. 2. The method according to claim 1, characterized in that da2 the thread is cut at a distance from the bobbin tube that corresponds at most approximately to its circumference. 5. The method according to claim 1 or 2, characterized in that * in one next to the 309883/0977 ORIGINAL INSPECTED 23/9 798 net that the thread after the supply line to the suction from the Traversing removed and after applying the reserve winding is inserted again into the traversing. 4.! The method according to claim 1, 2 or 3, characterized in that g e k e η η - draws that this forms the beginning of the reserve winding Thread end taken up by an adhesive zone on the bobbin tube and is held. 5. The method according to claim 4, characterized in that the reserve winding is applied in the adhesive zone. 6. The method according to claim 1, 2 or 3, characterized geke η nze leans that the taking up and holding of the thread on the bobbin is done by clamping the thread on an end face of the bobbin. > 7. The method according to claim 6, characterized in that nac: the clamping of the thread run between normal traversing area and face of the sleeve is placed. 8. Device for performing the method according to one of the claims 1 to 7, which have an up-swiveling into a rest position and swiveling down into an operating position for a removable carrier Has bobbin case, wherein the bobbin case rests in the operating position of the carrier on a drive roller, driven and is wound with traversing, thereby marked te net that the pivotable carrier (11) has a thread suction device 309883/0977
ORIGINAL INSPECTED (9) and a thread cutting device (10) - seen in the running direction of the bath - is assigned behind the drive roller (6) and that the carrier (11) is provided with a switching element (15, 79), through which, when it is pivoted down, shortly before the operating position is reached the cutting device (10), which is ready to cut, is actuated. 9. Device according to one of the claims, characterized in that the cutting edge of the cutting device (10) and the suction opening (23) of the pad suction device - viewed in the running direction of the thread and based on the operating position - approximately in alignment with an end plane of the inserted one Spool tube (14) are arranged on the machine frame. 10. Apparatus according to claim 8 or 9, characterized in that the cutting device (10) has a suction opening which is in communication with the thread suction device. 11. The device according to claim 8, 9 or 10, characterized in that that the cutting device (10) has a housing (21) in which a preferably pushed against spring pressure Cutting pin (20) is guided, one end of the cutting pin (20) protruding from the housing. 12. The device according to claim 8, 9, 10 or 11, characterized in that the cutting pin (20) at its ^{end protruding from a} housing (21) preferably transversely to 309883/0977 its longitudinal axis extending recess (23), one edge (33) of which forms a cutting edge, the one on the housing (21) a fixed cutting edge (32) is assigned. 13. Apparatus according to claim 3, 9, 10, 11 or 12, characterized in that that the cutting pin (20) has a longitudinal channel (24) at the protruding end of the cutting pin opens out in the recess (23) and there forms the suction opening and that within the housing (21) with the thread suction device (8) communicates. 14. Device according to one of claims 8 to 13, characterized in e that within the housing (21) on the cutting pin (20) an at least partially rotatable, in the longitudinal direction UnQrschiebliche switching sleeve (25) is mounted, which has a system of guide grooves (28, 29, 30) into which an on Housing attached guide pin (31) engages and which is designed so that in cooperation with the guide pin (31) the grooves in each case when the cutting pin (20) is moved in the housing (21), the latter is alternately fully extended into the cutting position or is held in the rest position under cover of the aneaug opening in the housing. 15. The device according to claim 14, characterized in that that the groove system in the circumferential direction of the switching sleeve seen having two grooves (28, 30) arranged at a distance from one another, the longitudinal extent of which corresponds approximately to the stroke of the cutting pin (20) and which are approximately V-shaped at their lower ends. 309883/0977 2379798 are üc iuiuonge adds, their upper ends by a further shorter, in Llirer LängserStockung also approximately V-shaped connecting groove (29) to a closed insich groove system comparable are bound. 16. The device according to claim 15, characterized in that that the longitudinal plugging of the shorter, V-shaped connecting groove (29) is dimensioned so that the guide pin (31) the Cutting pin (20) locked in a small position in the housing, da.?, the recess (23) provided with the suction opening is covered is. 1;. Device according to one of Claims 8 to 16, characterized in that a mechanism (39 »40, 41» 44, 45 ^% ) is provided, which is actuated by the bobbin carrier (36) - shortly before lifting the thread out of the traversing Reaching the maximum extreme swiveling up position can be moved in the lifted position. 13. The device according to claim 17, characterized in that that the mechanism for the thread lifting after downward pivoting of the carrier (36) can be reset by a certain amount in the rest position. 1y. Device according to dependent claim 18, characterized in that an IlechanisniUG which can be actuated by the carrier (36) zuiii guiding the thread lifted from the traversing in one next to the normal traversing range of the sleeve (62) Zone is provided. ' 309883/0977 2379798 20. The device according to claim 19, characterized in that the Liechanisiiius zui: i guiding the thread during Moving into the lowest operating position of the carrier in the rest position is resettable. .''1. Device according to one of the preceding claims, inr.beoondei-e for carrying out the method according to claims 7, characterized in that the machine frame has a support (7o) on which the carrier ('M) at I.'iedorschv / enken kura rests before reaching the operating position, that the carrier (74) has a nose (77) which is arranged so that the carrier (74) thereby snows laterally on the Sehneidstift (75) located is supported, and that a switching lever (79, SO) is preferably mounted on the carrier, through which the cutting pen can be printed into its housing. -Wr se 0 9 8 8 3/0977