EP0873276B1 - Spooling machine - Google Patents

Abstract

The invention relates to a spooling machine winding a continuously running thread onto a spool. The thread (2) is thus guided back and forth along a cross-winding traverse by a cross-winding device, alternating between a guiding edge (28) of a main guide (8) and a counter guiding edge (29) of an auxiliary guide (9) located in the traverse end areas. The guiding edge of the main guide and the counter guiding edge of the auxiliary guide penetrate the cross-winding plane in an opposite direction. The auxiliary guide can be moved across the cross-winding plane (21) so that the counter guiding edge (29) of the auxiliary guide penetrates the cross-winding plane to a lesser extent or not at all.

Description

The invention relates to a winding machine for winding a continuously starting thread according to the preamble of claim 1.

Such a winding machine is known from EP 0 677 019 (Bag. 2058). Here, the thread is transversely to by means of a traversing device Thread running back and forth along a predetermined traversing stroke. The traversing device is designed as wing traversing. It is therefore necessary to equalize the traversing speed over the entire traversing stroke of the thread by means of a leading edge a guideline is steered from the traversing plane. This will compensates for the difference in thread guide speed of the wing. Around moreover, the wrap angle occurring due to the deflection of the thread to equalize at the leading edges, the well-known Winding machine in each of the stroke end areas on an auxiliary ruler that penetrate the traversing plane with their counter-guide edges in such a way that the thread is deflected in the opposite direction.

With this arrangement, the problem arises that the thread when changing the bobbin is not freely deflectable in the stroke end areas and therefore not is to be removed from the traversing. The evasive movement of the thread in the stroke end areas is through the leading edge of the main ruler and limited by the opposite guide edge of the auxiliary guide.

The US 4,674,694 discloses a winding machine in which the thread by means of several wings arranged side by side within a traverse stroke is brought about. In particular, the thread is made up of three co-rotating wings from one stroke end to the opposite stroke end and vice versa, the thread simultaneously sliding along the leading edge of a guide ruler. On The ends of the guide ruler each have pivotable end sections which are transverse to the The position of the thread running plane can be changed. The end sections of the ruler will be only to influence the length of the traversing stroke in its position changed. Here, the end sections of the guideline have opposite guide edges on, which are firmly coupled to the end portions of the guideline. The However, opposite guide edges do not lead the thread in the sense of the registration. They only affect the thread transfer between the wings. A Movement relative to the guideline is not possible.

Accordingly, it is an object of the invention, a winding machine of the beginning mentioned type in such a way that the thread in the stroke end areas can be guided out of the traverse for the purpose of changing the bobbin.

Another object of the invention is to change the length of the traversing stroke perform.

The solution results from the features of claim 1.

According to the invention, the auxiliary guide can be moved transversely to the traversing plane in such a way that that the opposite guide edge the traversing plane less or not penetrates. So that the thread in the partial area between one Transition point and the stroke reversal point through the wing. The The transition point is the position in which the leading edge of the main guideline penetrates the traversing plane, so that the leading edge in the Section to the end of the traversing stroke runs outside the traversing plane. Thus, the thread detaches from the leading edge of the at the transition point Hauptleitlineals. Since the counter guide edge arranged for thread deflection the auxiliary guide has moved out of the traversing plane, the thread is free for inclusion in a thread catcher which removes the thread from the area of influence the wing leads. The advantage of the invention is that Thread due to the missing counter guide edge before reaching the Stroke reversal point slides down from the leading wing tip. So that will on the one hand a stroke reduction is achieved and on the other hand it is prevented that the thread tension drops during the bobbin change, so that Wrong windings caused, for example, by the so-called striker on full coil can be avoided.

Furthermore, the winding machine according to the invention has the advantage that when changing the thread with high security from the thread catching element can be taken over, since the thread is only passed through the wing and is therefore offered repeatedly to the catch element.

The development according to claim 2 has the advantage that the drag length of the thread is almost constant. The drag length is defined here than the length between the leading edge of the ruler and the point of impact on the pressure roller. This gives an exact length of the traversing stroke respected.

The arrangement of the main guide and auxiliary guides according to claim 3 is particularly advantageous for operating and threading the thread.

Here, the embodiment according to claim 4 is a particularly cheap and simple design of the main guideline.

Another particularly advantageous development according to claim 5 before that a thread catching element is arranged adjacent to the auxiliary guideline, which in the stroke end area of the traverse stroke to take over the thread is movable out of the traversing. Here, the thread catching element is such positioned that the caught thread is not immediately near the turning point runs onto the full spool. The thread continues placed securely on the spool.

It is advantageous here if the thread catching element according to claim 6 is trained. As a result, the thread is moved in directly by means of the traversing guided the catch slot of the thread catching element. The wrap of the Thread on the leading edge of the catch causes the thread to catch no substantial thread tension fluctuations occur.

It is particularly when the thread is transferred to the traversing device beneficial if the movements of the auxiliary ruler and the movement of the catch lock are coupled (claim 7). This ensures that between the thread reserve formed on the sleeve and the first layer within the traverse stroke, a smooth transition without thread accumulation arises. The coupling of the sequence of movements can be done by predetermined Define motion laws, such as through gears.

For removing the thread from the traversing device and for transfer of the thread in the traversing device, it is also advantageous if the movements of the auxiliary guide and the Catch lock are synchronous (claim 8).

According to a particularly advantageous embodiment of the winding machine Claim 9, the opposite guide edge is used to remove the thread free the catch slot of the catch lock.

The embodiment according to claim 10 is particularly advantageous in order to reproducible wrap angles at each winding Get leading edges.

The development of the winding machine according to claim 11 is advantageous especially when changing the bobbin, since the movements between the Thread catcher and the movable part guide in a simple way can be combined.

To change the traverse stroke length during the formation of the coil and so that a so-called breathing can be realized, the winding machine is in accordance with Claim 13 advantageously executable.

Further advantageous developments of the invention are in the subclaims Are defined.

Some embodiments are described below with reference to the attached drawings described in more detail.

Fig. 1

die Vorderansicht einer erfindungsgemäßen Aufspulmaschine;

Fig. 2 und 3

die Seitenansicht der Aufspulmaschine aus Fig. 1 mit unterschiedlichen Fadenstellungen längs des Changierhubes;

Fig. 4 und 5

die schematische Aufsicht auf eine Changiereinrichtung mit Hauptlineal und Hilfsleitlineal;

Fig. 6 und 7

ein weiteres Ausführungsbeispiel einer Changiereinrichtung mit einem aus einem beweglichen und einem ortsfesten Teilleitlineal bestehenden Hilfsleitlineal;

Fig. 8

ein weiteres Ausführungsbeispiel einer Aufspulmaschine in der Wechselphase beim Umlegen des Fadens.

They represent:

Fig. 1

the front view of a winding machine according to the invention;

2 and 3

the side view of the winding machine of Figure 1 with different thread positions along the traverse stroke.

4 and 5

the schematic plan view of a traversing device with a main ruler and auxiliary guide ruler;

6 and 7

a further embodiment of a traversing device with an auxiliary guide ruler consisting of a movable and a fixed partial guide ruler;

Fig. 8

a further embodiment of a winding machine in the change phase when turning the thread.

In Fig. 1 is a front view of the winding machine according to the invention shown. Here, the thread 2 runs over a head thread guide 1 to one Traversing device. The traversing device is as wing traversing executed as known from EP 0 114 642 (Bag. 1321) and there is described in detail. The wing traversing device consists of the Wings 6 and 7, which are driven in opposite directions by the traversing drive 5 become. The main guideline is in a plane parallel to wings 6 and 7 8 arranged. The auxiliary guideline is opposite the main guideline 8 9 arranged. Here, the auxiliary guide 9 with a linear drive 10 connected. The thread catching element is in a plane parallel to the auxiliary guide 9 11 with the carrier 12 attached to a linear guide 13. The Linear guide 13 is moved in the direction of movement 33 by means of the drive 14 emotional. A pressure roller 4 can be rotated below the traversing device mounted on a rocker 39 in the machine frame 19. The pressure roller 4 lies on the coil surface with a predetermined contact pressure the coil 3. The coil 3 is formed on a sleeve 15.1. The sleeve 15.1 is clamped on a winding spindle 16.1. The winding spindle 16.1 is driven by the spindle motor 17.1. Here, the Spindle speed controlled so that the peripheral speed of the coil remains constant during winding. For this, the speed of the Pressure roller measured. The winding spindle 16.1 is on a turret 18 stored. The turret 18 is 180 ° with respect to the spindle 16.1 offset a second spindle 16.2. On the winding spindle is 16.2 the empty sleeve 15.2 stretched.

In the winding machine shown, the thread 2 is without interruption Delivered at a constant speed. The thread 2 is first through guided the head thread guide 1, which forms the tip of the traversing triangle. The thread then enters the wing traversing device. It assigns the Wing 6 and 7, which are attached to two rotors (not shown here). The rotors rotate in different directions and drive the wings so that the thread alternately on the leading edges of the main guideline and the auxiliary guideline, the one wing takes the lead in one direction and then under the ruler dips while the other wing guides in the other Direction takes over and then dips under the ruler. Behind the traversing device the thread on the pressure roller 4 with more than 90 ° deflected and then wound on the spool 3. The coil 3 is on the sleeve 15.1 formed. The sleeve 15.1 is on the freely rotatable winding spindle 16.1 clamped. The winding spindle 16.1 is located on it clamped sleeve 15.1 in the operating position. Located at that time the second winding spindle 16.2 is in a waiting position. After the coil 3 is wound up to the end, the winding spindles 16.1 and 16.2 by means of Revolvers 18 pivoted such that the winding spindle 16.2 with the empty tubes 15.2 engage in the thread path. The sequence of movements for this will described later. '

In Figures 2 and 3, the winding machine is different Thread positions along the traverse stroke shown in the side view. Compared to the arrangement from FIG. 1, the traversing device is here represented by the rotors 22 and 23, wherein on the rotor 22 the Wing 7 and the rotor 23 of the wing 6 is arranged. The rotors 22 and 23 are arranged such that the wings 6 and 7 in two closely adjacent, revolve around parallel planes of rotation. Between the head thread guide 1 and the pressure roller 4, the traversing plane 21 is spanned.

In the situation shown in Fig. 2, the thread 2 is through the wing 6 along the main guide 8. Here is the thread 2 from the Traversing plane 21 deflected. This situation corresponds to the thread run in the Middle range of the traverse stroke.

3 is the situation in the stroke end regions of the traversing stroke shown. Here, the thread is attached to the auxiliary guide by means of the wing 6 9 led. The thread 2 is in the opposite direction deflected to the center of the stroke from the traversing plane. By this arrangement ensures that the wrap angle on the Main ruler and the auxiliary ruler in the extreme deflection points Traversing level are approximately the same size. Thus, in the stroke end areas there is no significant drop in thread tension.

4 is a schematic plan view of a traversing device with Main ruler and auxiliary ruler shown. The main guideline 8 is on the Drive side of the traversing device attached such that its leading edge 28 penetrates the traversing plane 21 at the transition points 24. Thus, the thread 2 with the wings of the traversing device inside the traversing stroke between the transition points - i.e. in the middle area - guided along the leading edge 28. In the neighboring to the central area Areas of the traverse stroke are opposite the auxiliary guide 9 the main ruler 8 arranged. Here, the auxiliary guide 9 has a Counter guide edge 29 on the traversing level 21 in the immediate vicinity penetrate the transition points 24 in the direction of the drive side. The Counter-guide edge 29 of the auxiliary guide 9 extends over the stroke reversal points out. This ensures that as soon as the thread 2 in leadership has passed the transition point 24 along the leading edge 28, the thread as it passes through the traversing plane from the leading edge 28 to the opposite guide edge 29. The thread is then in the Area between the transfer point 24 and the reversal point 25 at the Counter guide edge 29 out. The stroke reversal point 25 occurs in each case thread-guiding wing away from the main guide and the non-thread-guiding Wing takes over the thread.

The mobility of the auxiliary guide 9 makes it possible to determine the stroke reversal point to change the thread during winding. So that will advantageously affects the traversing stroke. Thus, the thread deposit on the to be formed coil are influenced such that hard coil edges as well saddle formation on the coil can be avoided.

The thread guide runs in the operating position of the auxiliary guide 9 accordingly so that the thread in the middle of the traversing stroke on the Leading edge 28 of the main guide 8 is guided along. Here is the Middle area characterized by the area between the transition points 24. Outside the central area in the adjacent sub-areas becomes the thread between the transition point 24 and the stroke reversal point 25 guided on the opposite guide edge 29. Now the auxiliary ruler 9 by means of the linear drive 10 in the direction of movement 32 essentially displaced perpendicular to the traversing plane, the thread loosens upon entry into a partial area of the traversing stroke adjacent to the central area the leading edge 28 of the main guideline 8. The thread is now exclusive guided by the leading wing. Because no excursion the traversing plane through the counter guide edge 29, the remains Thread in the traversing plane. As a result, the thread moves with increasing Rotate the wing along the leading edge of the wing until it is off the wing tip drops. The thread can no longer go from the wing to the stroke reversal point 25 are performed. Thus, the traverse stroke is shortened, which is advantageously used to control the mass distribution on the coil can be.

In the embodiment of the traversing device according to FIG. 4, this is Auxiliary ruler 9 with its counter guide edge 29 on the opposite Arranged side to the guide ruler 8 with the leading edge 28. Around To be able to insert the thread 2 in the traversing becomes the auxiliary guide 9 move by means of the linear drive 10 such that the distance enlarged between the guide edge 28 and the counter-guide edge 29, so that thread insertion or when changing from a full spool to one Empty bobbin a thread end name is made possible by a thread catching element. After the thread 2 is grasped by a wing when it is inserted, that is Move the auxiliary guide 9 into its operating position using the linear drive. The operating position is predetermined by a fixed stop 40. to The windows are reduced in the stroke end areas in the auxiliary guide 27 incised. There is also an incision in the main guide 8 Window 26 introduced to reduce mass.

5 shows a further exemplary embodiment of a traversing device shown. The structure is very similar to the exemplary embodiment from FIG. 4, and in this respect reference is made to the description of FIG. 4 and the functional description to Fig. 4 referenced. In contrast to the embodiment 4 is the auxiliary guide 9 according to the embodiment 5 U-shaped. The thigh ends have an approach on which the counter-guide edge 29 in each case in the stroke end regions is trained. The one intended for moving the auxiliary guide Linear drive 10 engages the cross strut carrying the legs. This Arrangement has the advantage that all drives and thus any connections lie on one side of the traversing plane. This is particularly beneficial for the operation as well as for the thread guidance of the winding machine.

6 is another embodiment of a movable auxiliary guide shown. Here, the auxiliary guide is in two sub-guides 9.1 and 9.2 divided up. The partial guide ruler has the opposite guide edge 29.1 and that Partial ruler 9.2 the opposite edge 29.2. The partial guideline 9.2 is stationary with connected to the main guideline. The sub-ruler 9.1, on the other hand, is movable executed and can be moved by means of the linear drive 10 such that the counter-guide edge 29.1 emerges from the traversing plane. At this Arrangement is the same thread course as previously in the embodiment 4 described.

In Fig. 6 it is also shown that in a parallel plane to the partial guide 9.1 the thread catching element 11 is arranged. The thread catcher 11 has a catching guide edge 30 which ends in a catching slot 31. The thread catching element 11 is in the direction of movement by means of the linear drive 13 33 movable parallel to the traversing plane. The partial guideline is 9.1 by means of the linear drive 10 in the direction of movement 32 transversely to the traversing plane movable.

In Fig. 7 the situation is now shown in which the partial guide rule 9.1 is perpendicular to the traversing plane, so that the opposite guide edge 29 no longer penetrates the traversing plane 21. In this situation the thread 2 guided by the wing in the area between the transition point 24 and the stroke reversal point 25 none for deflecting the thread from the Obtain the guiding level provided. Thus, the thread is already there before reaching the stroke reversal point 25 from the wing tip of the thread guiding Wing fall down. The situation shown in Fig. 7 concerns however the bobbin change. Therefore, at the same time as moving the partial ruler 9.1 the thread catching element 11 is moved into the traversing stroke. The Thread catching element 11 takes a position in the area between the Transition point 24 and the stroke reversal point 25. Now the thread 2 out by means of the wing 6, the thread after passing through Transition point along the catch guide edge 30 of the catch lock 11 in Slide in the direction of the catch slot 31. The thread 2 falls at the end of the Catch guide edge 30 in the catch slot 31 of the thread catching element. in this connection the thread comes as far as possible out of the reach of the rotating wings. The wing bringing the thread sweeps over to guide the thread into the Catch slot 31 just the catch guide edge 30 of the thread catching element. The catch slot 31 is directed so that the thread from the area of immersed rotating wing towards the traversing plane. So is the thread is guided in the thread catching element 11, for example for changing the bobbin with the thread again from the area of the traverse stroke is moved. In this situation there is now a change between the full spool and before the new coil to be formed, as in the known one Winding machine according to EP 0 374 536 (Bag. 1670) runs. So far referred to this document, the exact movements of the revolver with the two winding spindles in the change phase.

As soon as the thread on the full spool through an extended swivel plate (see FIG. 8) is fixed, the thread catching element 11 moves with the thread to the right outside of the traverse stroke in a so-called catch position. In this position the thread over the sleeve catch slot 20 (see Fig. 1) led the new sleeve. When the thread is caught, it is repeated Movement of the catch lock to the left. In this phase the thread reserve formed on the new sleeve. With the movement of the catch lock 11 in the direction of the stroke reversal point, the partial guide ruler 9.1 in his operating position moves. This in turn takes place one after the other coordinated movement of the partial guide and the catch lock. While if the thread catching element 11 moves to the left, the retracting element lifts Counter guide edge 29.1 the thread continuously from the catch slot 31 of the catch lock 11 out. Shortly before reaching an issue position of the catch lock, the thread is completely led out of the catch slot 31 and thus returns to the traversing. This issue position of the Catch lock is only just outside the traversing stroke, so that the iridescent thread do not touch the thread catcher element still standing there can. The counter guide edge 29.1 of the partial guide rule 9.1 is now completely moved into their working position. So the thread can be normal again be changed.

The exact coordination of the movements of the partial guideline and the catch lock can be controlled via software-controlled pneumatic switching elements and separate linear drives 10 and 13 or by a change-over gear with a linear actuator.

In the embodiment of the traversing device according to FIGS. 6 and 7 however, it is also possible to close the second partial ruler 9.2 with a drive Mistake. This gives you the option of sub-guidelines 9.1 and 9.2 to move during the winding travel such that a mutual or equilateral traverse stroke shortening can be set. Through this Measure allows breathing to a limited extent during the winding trip realize. Here, the partial guideline with the respective opposite guide edge moved out of the traversing plane so that the thread in front Reaching the stroke reversal point early from the leading wing slides. The thread then turns from that in the opposite direction rotating wing taken over and returned.

8 is another embodiment of a winding machine in the Change phase shown. This winding machine corresponds essentially to that known winding machine from EP 0 374 536; to that extent too Reference to this document. The thread 2 is hereby a lifting device 34 lifted out of the traversing. The lifting device is pivotally attached to the pivot axis 35. The In this situation, auxiliary guide 9 is extended so far that the thread run unhindered from the lifting device 34 onto the pressure roller 4 can. Between the empty sleeve 15.2 and the coil 3 is a pivot lever 36 pivoted, which guides the thread 2 with a sheet 38, that the thread 2 runs on the full spool 3. The lifting device 34 itself or a thread catching element, as shown in FIGS. 6 and 7, now leads the thread from the traversing area to the swivel plate now at an angle running thread is guided over the catch slot of the empty tube 15.2. The pivot lever 36 is pivotally attached to the pivot axis 37. After the thread 2 on the empty tube 15.2 in the tube catch slot is caught and thus the thread between the full spool 3 and the empty tube 15.2 is broken, the new winding process can begin. For this the lifting device 34 is positioned such that the thread 2 again is taken over by the change. At the same time, the auxiliary ruler 9 returned to its operating position.

In the design of the winding machine, in which the main guide and the auxiliary ruler lie in parallel planes to each other, can advantageously Thread wrap, in particular in the area of stroke reversal, is enlarged in this way be that the leading edge of the main guideline and the Cover the leading edge of the auxiliary ruler. With such an arrangement can, e.g. is described in DE 34 17 457 (Bag. 1405), the Drag length can be varied. It can also be used to thread any thread to adjust.

It should be expressly mentioned here that the winding machine according to the invention also such wing movements recorded in which the thread by means of several wings arranged side by side over a traversing stroke is relocated.

LIST OF REFERENCE NUMBERS

1

Yarn guide

2

thread

3

Kitchen sink

4

pressure roller

5

Traversing drive

6

Driver arm, wing

7

Driver arm, wing

8th

main guide

9

auxiliary guide

10

linear actuator

11

Yarn catching element

12

carrier

13

linear guide

14

drive

15

shell

16

winding spindle

17

spindle motor

18

revolver

19

machine frame

20

Sleeve catching slit

21

Traversing plane

22

rotor

23

rotor

24

Transfer point

25

stroke reversal point

26

window

27

window

28

leading edge

29

Opposite guiding edge

30

Fang leading edge

31

catching slit

32

movement direction

33

movement direction

34

lifting device

35

swivel axis

36

pivoting lever

37

swivel axis

38

sheet

39

wing

40

attack

Claims (13)

1. Take up machine for winding a continuously advancing yarn (2) to a package (3) on a tube (15), the apparatus comprising a rotary plate type traversing apparatus, which is arranged between an apex yarn guide and a contact role (4), the apex yarn guide (1) and the contact role (4) forming a tangential plane (traversing plane 21), and which reciprocates the yarn by means of driven rotary plate (6, 7) traversely to the direction of yarn advance along a predetermined traverse stroke;
   two guide plates (8, 9), of which a main guide plate (8) has a curved guiding edge (28), which extends through the traversing plane in a sectional region (medial region) comprising the centre of the traverse stroke, wherein an auxiliary guide plate comprises an opposite guiding edge (29) facing the guiding edge (28) of the main guide plate (8), the opposite guiding edge (29) extending through the traversing plane (21) in the partial regions adjacent to the medial region,
   characterized in that the auxiliary guide (9) is movable crosswise to the traversing plane (21) in such a manner, that the opposite guiding edge (29) extends to a lesser extend or does not extend through the traversing plane (21) and that the distance between the guiding edge (28) and the opposite guiding edge (29) is increased.
2. Take up machine as in claim 1, characterized in that the main guide plate (8) and the auxiliary guide plate (9) extend in one plane.
3. Take up machine as in claim 1 or 2, characterized in that the main guide plate (8) and the auxiliary guide plate (9) are arranged in the direction of yarn advance upstream of the rotary plates (6, 7).
4. Take up machine as in one of claims 1 to 3, characterized in that the main guide plate (8) is located on the drive side of the rotary plates with respect to the traversing plane (21), and that the auxiliary guide plate (9) is located on the side of the traverse plane facing away from the drive side of the rotary plates.
5. Take up machine as in one of claims 1 to 4, characterized in that a yarn catching element (11) adjacent to the auxiliary guide plate (9) is arranged outside of the traverse stroke, and that the yarn catching element (11) is movable into the end region of the traverse stroke for receiving the yarn from the traversing range.
6. Take up machine as in claim 5, characterized in that the yarn catching element (11) is movable with a guiding edge (30) and a catching slot (31) formed at the end of the guiding edge (30) into a sectional region of the traverse stroke adjacent to the medial region, wherein the rotary plate (6) that delivers the yarn paths over the guiding edge (30) for purposes of transferring the yarn.
7. Take up machine as in claim 5 or 6, characterized in that the movement of auxiliary yarn guide (9) from the traversing plane and the movement of the yarn catching element (11) into and out of the region of the traversing stroke are coupled.
8. Take up machine as in claim 7, characterized in that the auxiliary guide plate (9) and the yarn catching element (11) are synchronously movable.
9. Take up machine as in one of claims 5 to 8, characterized in that during the movement of the auxiliary guide plate (9), the opposite guiding edge (29) passes over the catching slot (31) of the yarn catching element (11), the catching slot being oriented substantially traversely to the traversing plane (21).
10. Take up machine as in one of the claims 1 to 9, characterized in that the movement of the auxiliary guide plate (9) to its operating position is limited by a stop (40).
11. Take up machine as in one of claims 1 to 10, characterized in that the auxiliary guide plate consists of two sectional guide plates (9.1, 9.2), each sectional guide plate being arranged in the stroke end regions, and that the one sectional guide plate (9.1) is movable on the side of the catching element (11), and the other sectional guide plate (9.2) is stationary.
12. Take up machine as in claim 11, characterized in that the main guide plate (8) and the sectional guide plates (9.1, 9.2) are arranged on a support, which is mounted on the drive side of the rotary plates with respect to the traversing plane.
13. Take up machine as one of claims 1 to 10, characterized in that the auxiliary yarn guide consists of two sectional yarn guides (9.1, 9.2) which are each arranged in the stroke end regions, and that both sectional guide plates (9.1, 9.2) are movable.

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