EP0761854B1 - False-twisting machine with pneumatic yarn insert guide - Google Patents

Description

The invention relates to a texturing machine with a height adjustable Thread feeder according to the preamble of claim 1, s. the document US-A-3 981 128.

Texturing machines with height-adjustable thread feeders are further out following publications known. From DE-PS 23 48 322 a thread feeder is known, which a height-adjustable handrail with slide guide and a rope mechanism described with pulleys for bridging larger operating heights. The mechanism is relatively complicated and requires long operating paths in manual operation of the handrail and also requires in addition to a high level of force, a high level of skill on the part of the operator.

From DE 25 30 125 C2 is also a thread feed rod with straight guides known which is to be operated manually and swivel arms for Includes thread guides. This manually operated thread feed rod also requires a high level of strength and skill especially when the machine is at great heights.

From DE-PS 1 817 084 is a manually lifting and lowering rod known as a gallows for a thread guide. Again, it is for them Operator required the rod manually with great force and a lot Raise or lower skill.

From DE-AS 21 55 514 is also a manually displaceable rod known with guides as thread feeders.

All known texturing machines with the height-adjustable thread feeders The state of the art has in common that, above all, for large A relatively large amount of effort by the operator as well as a high level Skill for putting on a thread from a lower threading position in an upper thread feed position is required. The disadvantage of mechanical thread feeders used in the known texturing machines consists in the fact that the displacement of the operator bar is up to approx. Protrudes 1.20 m into the operator aisle. This relatively large rod must go through the Operator are moved.

It is therefore the object of the present invention, a texturing machine to create with height-adjustable thread feeder, which with low Effort and without great skill with small to be covered Can be operated because of the operator.

This task is done with a texturing machine with adjustable height Thread feeder with the features according to claim 1 solved. Appropriate Further training is defined in the subclaims.

Then the texturing machine, which has a height-adjustable Thread feeder for applying a thread in a heating device and / or Cooling device is provided and in which at each workstation Thread over a delivery plant, the heating device, the cooling device, one False twist and a take-off unit is wound up. There in the event of a power failure in a machine, the threads in the heaters melt quickly can or even burn, it is desirable to remove all threads quickly to remove from the heaters. For this purpose, the operator is as possible easy-to-use thread feeder required. According to the invention the thread feeder has a sliding element with at least one magnet, which is attached to the outer surface of a sleeve and slidable thereon is attached. The polarity of the magnet is opposite to the polarity one guided inside the sleeve and displaceable pneumatically with compressed air rodless magnetic piston. Through the compressed air Magnetic pistons can use the sliding element with continuous supply of compressed air which the thread guide can be moved into a desired position or can also be held in this by a corresponding circuit.

The control of the compressed air supply to the respective side of the in the sleeve guided magnetic piston takes place by means of a control valve, which is preferably is designed as a 4/3-way valve.

The magnetic piston can be controlled so that the thread feeder is in any desired position Position can be locked. The 4/3-way valve can be manually switched between a first rest position for retracting or driving the Thread guide, a second locking position for holding the thread guide in a certain position and a third locking position for extending the Thread guide can be adjusted. Through the different rest positions the supply of compressed air from a compressed air source to the top or Underside or on the top and bottom of the magnetic piston realized. When the compressed air is on the top of the magnetic piston in the Is fed sleeve, the magnetic piston in the sleeve from the top to shifted below, i.e. the sliding element or the thread guide is retracted.

If, on the other hand, compressed air is applied to the underside of the magnetic piston , the magnetic piston of moved upwards, causing the thread guide to extend becomes. If the second locking position is selected, compressed air is both on the top of the magnetic piston as well as the bottom of the magnetic piston led, due to the prevailing pressure equalization between the top and bottom of the magnetic piston in the sleeve, the thread feeder is held in this position. This stop position can during the insertion stroke and also during the extension stroke of the thread feeder can be activated in any position along the sleeve.

According to a further embodiment is also to control the 4/3-way valve an additional 2/2-way valve is provided, which has a separate control device is controlled. This 2/2-way valve is included an additional compressed air connection connected to the 4/3-way valve, so that in the event of a power failure via this additional compressed air connection, the 4/3-way valve is so controllable that the thread guide is retractable. That is so far important than in the event of a power failure due to their heat capacity, the heaters Maintain temperature for a relatively long time. The one that was no longer extracted Thread can thus come into contact with the heater surfaces and thereby melt or burn, which is why it is important to such a power failure the thread easily, relatively quickly and easily led out of the heater or also from the cooling device can be. This is done by retracting the thread guide.

In a further preferred embodiment, the locking positions realized by means of a plunger. With this tappet the 4/3-way valve, d. h. his spool controlled, this spool as Double piston is formed and, depending on the locking position, the supply of compressed air controls to the bottom and / or top of the magnetic piston. The different locking positions of the plunger are close enough and need only the distance between the individual pistons of the double piston correspond so that the corresponding leads to the Bottom or top of the magnetic piston can be covered or released are. This results in short distances that are easy for the operator and can be carried out with little effort. For realization these locking positions are provided in the plunger locking grooves, which engage in spring-loaded locking elements, so that by moving the Plunger engages in the desired locking groove. The direction of operation is in accordance with the desired direction of movement of the Thread guide. The direction of actuation is to be understood as the direction in which the plunger must be pressed or pulled.

The locking grooves can both between the plunger handle and the Double piston or between the individual pistons of the double piston be arranged. The latter type represents a more compact type for the 4/3-way valve serving as a control valve.

Another embodiment shows an advantageous embodiment of the upper stop, in which a contact switch is integrated. As a result, control pulses can be transmitted to a control device for opening and closing a heating flap of the heating device. The operator can thus control both the thread feeder and the heating flap with a single actuation of a control valve. It is particularly advantageous here if the heating flap is adjusted with a control device that is pressurized with compressed air. The thread feeder and the control device can be supplied with a pressure source.
Further advantages, features and possible applications of the invention will now be explained in more detail using exemplary embodiments in conjunction with the drawings.

Fig. 1

ein pneumatisches Schaltbild des pneumatisch beaufschlagten Fadenanlegers;

Fig. 2

den prinzipiellen Aufbau einer Texturiermaschine in Verbindung mit der üblichen Anordnung eines Fadenanlegers;

Fig. 3

einen mit einem 4/3-Wege-Ventil gesteuerten Magnetfadenanleger in einer ersten Raststellung (Hochfahren) des Steuerventils;

Fig. 4

ein Fadenanlegersystem gemäß Fig. 3 in einer zweiten Raststellung (Position Halten) des Steuerventils;

Fig. 5

ein Fadenanlegersystem gemäß Fig. 3 in einer dritten Raststellung (Einfähren) des Steuerventils;

Fig. 6

ein weiteres Ausführungsbeispiel mit zwischen den Einzelkolben eines Doppelkolbens angeordneten Rastnuten;

Fig. 7

zwei Fadenanleger, die eine Heizeinrichtung bedienen, in ausgefahrenem Zustand.

Show it:

Fig. 1

a pneumatic circuit diagram of the pneumatically loaded thread feeder;

Fig. 2

the basic structure of a texturing machine in connection with the usual arrangement of a thread feeder;

Fig. 3

a magnet thread feeder controlled with a 4/3-way valve in a first latching position (raising) of the control valve;

Fig. 4

a thread feeder system according to FIG 3 in a second locking position (holding position) of the control valve.

Fig. 5

a thread feed system according to Figure 3 in a third locking position (insertion) of the control valve.

Fig. 6

a further embodiment with locking grooves arranged between the single pistons of a double piston;

Fig. 7

two thread feeders, which operate a heating device, in the extended state.

Fig. 1 shows a pneumatic circuit diagram of a basic arrangement of a first embodiment of the invention. A compressed air source 1 is over a 4/3-way valve 2 connected to the thread feeder 5. The thread feeder 5 has a sleeve in which piston rodless by pressurization a magnetic piston can be moved up and down. On the outside the sleeve is a sliding element 14 slidably attached as a magnet, which one Has polarity that is different from that of the magnetic piston inside the sleeve. This will make the magnet attached to the outer periphery of the sleeve or Gleitelememt 14 when pressure is applied to the magnetic piston inside the sleeve moves up and down. Slidable on the outer circumference of the sleeve arranged sliding element 14, a thread guide 6 is arranged by means of which the thread is inserted into the heating device 8 or cooling device 9 can be.

The 4/3-way valve 2 is controlled via a 2/2-way valve 3 which is in turn controlled by a control device 4. The 2/2 way valve 3 serves that in the event of a power failure, the compressed air source 1 with the in the sleeve 26 of the thread feeder 5 formed above the magnetic piston 7 Room is connected, so that in this situation with compressed air supply this space the magnetic piston 7 is moved from top to bottom.

Fig. 2 shows the basic structure of a texturing machine, in which the thread 10 from the payout spool 34 at each corresponding work station via a delivery unit 11, which consists of corresponding conveyor rollers, one Heating device 8 supplied. At the end of the heater 8 is a deflection roller 36 over which the thread 10 runs and is deflected, so that he then enters a cooling device 9. From the cooling device the thread 10 becomes a false twister 31 and a take-off mechanism 12 fed from where it is fed to a winder 13. At a In another embodiment, the thread 10 is passed through in front of the delivery mechanism 12 led another heater 33. Between the heater 33 and the False twist 31, the delivery mechanism 32 is arranged. In the upper part of the Texturing machine between the heater 8 and the cooling device 9 above The thread feeder 5 is shown from operating aisle 35. The elongated trained rod is designed as a sleeve 26, which on one side Has plugs for compressed air, and which on their other side, i.e. the lower side in Fig. 2, the actual with a plunger 16th has actuatable 4/3-way valve 2. That on the outside of the sleeve 26th guided sliding element 14, to which the thread guide 6 is attached, is in Fig. 2 shown in the top position. The top position corresponds to the Position in which the control valve receives compressed air from the compressed air source for as long 1 has fed to the bottom of the magnetic piston 7 until this in the sleeve in its uppermost position against the inlet plug or in an outer stop.

Fig. 3 shows the thread feeder in a first embodiment of the 4/3-way valve 2. A compressed air source 1 is provided on the control valve, via which compressed air is fed to the control valve. From this control valve is formed depending on the position of one by two individual pistons 15 Double piston a supply line to the underside of a rodless magnetic piston 7 or to the top of this magnetic piston 7, which is guided in a cylindrical sleeve 26. In opposite Polarity to polarize the magnet of the magnetic piston 7 is slidable on the outer circumference of the sleeve 26, a sliding element 14 with magnets which the actual thread guide 6 is attached with deflection roller 36. The magnetic piston 7 has a plurality of ring magnets arranged parallel to one another 29 on. In contrast, the ring magnets 28 in the outer jacket Sliding element 14 arranged. There is a compressed air connection in the 4/3-way valve 2 20 for connecting the compressed air source 1 to the control valve Compressed air connection 21 for connecting the control valve 2 to the top of the magnetic piston 7 via a compressed air connection piece 24 on the Top of the sleeve 26 to act on the top of the magnetic piston, a compressed air connection 22 for acting on the magnetic piston 7 from the bottom and a compressed air connection 23 for automatic Retracting the thread guide, i.e. to remove the thread from the heating device 8 or the cooling device 9 is provided. The double piston 15 of the control valve 2 also has a tappet 16 with a tappet handle. Between the double piston 15 and the tappet handle 3 are in the tappet Locking grooves 17 incorporated, which the respective locking positions of the thread guide 6 correspond. In the housing of the control valve 2 there is one with a spring 19 loaded ball 18, which in one of the respective Locking position engages corresponding locking groove 17 and so this respective Locked position locked. The first locking position shown in FIG. 3 corresponds the position at which the compressed air from the compressed air source 1 via the Compressed air connection 20 and the compressed air connection 22 the underside of the Magnetic piston 7 is applied, whereby it is extended, i.e. from is moved upwards. The compressed air connection 21 is with the ventilation channel 30 of the double piston connected so that the top of the Magnetic piston 7 is relieved. If the compressed air supply remains long enough, the magnetic piston 7 is moved up to the stop 43. Because of the different polarity of the ring magnets of the magnetic piston 7 inside the sleeve 26 and the ring magnet sliding on the outside thereof 28 thus the thread feeder 6 becomes synchronous with the movement of the magnetic piston 7 moves.

4 corresponds to the basic arrangement according to the invention according to FIG. 3, but in which the plunger 16 is in the second latching position, which the Holding the position of the thread guide 6 corresponds. If the ball 18 with the spring 19 is engaged in the second locking groove 17, the pressure connections 20 for the supply of compressed air from the compressed air source 1, the Compressed air connection 21 for the application of the top of the magnetic piston 7 and the compressed air connection 22 to act on the underside of the Magnetic piston 7 between the individual pistons 15 of the double piston arranged. This causes compressed air from the compressed air source to both Top of the magnetic piston 7 and led to the bottom. As a result, there is both on the top and on the bottom of the Magnetic piston 7 the same pressure, causing the magnetic piston and thus the thread guide 6 can be obtained in the respective position.

FIG. 5 shows the thread feeder according to FIG. 3, but in a third latching position of the plunger 16. This third locking position, in which the ball 18 with Spring 19 engages in the third locking groove, causes the compressed air connection 22 is connected to the ventilation duct 30, so that the underside of the Magnetic piston 57 is relieved. The two other compressed air connections 20, 21 are thus one above the other between the individual pistons 15 of the Double piston room connected to each other, so that compressed air from the compressed air source 1 directly via the connecting piece 24 to the top of the magnetic piston 7, whereby this together with the thread guide 6 is moved from top to bottom.

So that all threads are quickly removed from the heaters in the event of a power failure can to prevent them from burning, the control valve 2 with a further compressed air connection 23 connected in a chamber ends on the face of the double piston. If this compressed air connection 23 with Compressed air, preferably acted upon by the compressed air source 1, the Double piston without manual support in the third shown in Fig. 5 Rest position shifted, i.e. a switch position for retracting the thread layer.

To check whether all thread feeders are in the respective operating position a simple laser system with a sensor can be used. Such a laser is arranged transversely to the thread feeder 5, so that the laser beam can detect the position of the respective thread feeder 5. The can be done by monitoring the actual position of the thread guide 6, but this can also be done by detecting the position of the plunger 16 can be realized.

Fig. 6 shows a further embodiment, which in its basic Structure corresponds to that of FIG. 3. The control valve 2 has the locking grooves for fixing the corresponding locking positions in the area between the two pistons 15 of the double piston. As locking elements serves a locking pin 27 which, depending on the locking position in the corresponding Locking groove 17 engages.

The sleeve 26 of the thread feeder 5 is preferably made of metal; in a still preferred embodiment, the sleeve 26 consists of a stainless steel tube. However, it is also possible to make the sleeve 26 from a plastic tube to train. In any case, the tube is inserted in an aluminum profile. The compressed air lines are preferably included in the profile itself poured. At one end is the control valve with the tappet 16 or the shift rod arranged. Is at the opposite end the compressed air connection 24, via which a pressure connection to the pressure source 1 is realized. The aluminum profile is preferably an extruded profile educated.

Fig. 7 shows a further embodiment in which the thread feeder with its sliding elements 14 abuts an upper stop. The attack is formed here by a contact switch 38. The contact switch 38 is connected to a control device 37. The control device 37 consists of a control valve 39 and a lock cylinder 40. In the The position shown is the control valve 39 by means of the contact switch 38 shifted to its left switch position. The contact switch 38 receives here its switching impulse from the sliding element 14. In the left switching position of the control valve 39, which is designed as a 3/2-way valve Compressed air source 1 connected to the pressure chamber 41 of the lock cylinder 40. The locking cylinder 40 is by means of its piston rod 42 with the heating flap 44 of the heater 8 connected. When pressurizing the pressure chamber 41 extends the piston and thus closes the heating flap 44. At In the embodiment shown, the heating device 8 has two heating channels 43.1 and 43.2. A thread 10 is guided in each heating channel. The control device 37 in this case has two control valves 39, each controlled by a contact switch. Each contact switch 38 forms the stop for the respective thread feeder of the threads 10.1 and 10.2. With this arrangement, the heating flap 44 is closed only in the case that both thread guides or sliding elements 14.1 and 14.2 in their Stop. As soon as a sliding element 14 or thread guide from Stop is removed, the control valve is switched to its right switch position. In this switching position, the pressure chamber 41 of the locking cylinder 40 vented so that the heating flap 41 of the heating device 8 is opened or remains open. The thread can thus be removed.

Reference list

1

Compressed air source

2nd

Control valve (4/3-way valve)

3rd

Control valve (2/2-way valve)

4th

Control device

5

Thread feeder

6

Thread guide

7

Magnetic piston

8th

Stoker

9

Cooling device

10th

thread

11

Delivery plant

12th

Deduction mechanism

13

Winding up

14

Sliding element

15

Double piston

16

Pestle

17th

Locking groove

18th

Locking ball

19th

feather

20th

Compressed air connection

21

Compressed air connection

22

Compressed air connection

23

Compressed air connection

24th

Compressed air connection piece

25th

Compressed air connection piece

26

Sleeve

27

Locking pin

28

Ring magnet

29

Ring magnet

30th

Ventilation duct

31

False twist

32

Delivery plant

33

Stoker

34

Spool

35

Operating aisle

36

Overflow roller

37

Control device

38

Contact switch

39

Control valve

40

Locking cylinder

41

Pressure room

42

Piston rod

43

Heating duct

44

Heater flap

Claims (11)

1. Texturing machine with a plurality of work stations, in which a yarn (10) is guided via a feed mechanism (11), a heating device (8), a cooling device (9), a false twister and a draw-off mechanism (12) to a winding (13) at each work station,

   and in which a vertically adjustable yarn spreader is provided for spreading a yarn (10) in the heating device (8) and/or cooling device (9),

   wherein the yarn spreader (5) comprises a vertically adjustable slide element (14), to which a yarn guide (6) is secured,

   wherein the slide element (14) is a magnet which is mounted in a displaceable manner on the outer face of a sleeve (26) and the polarity of which is opposite to that of a magnetic piston (7) without a piston rod which is guided by compressed air inside the sleeve (26),

   characterised in that the magnetic piston (7) can be controlled by means of a control valve (2) to move the slide element (14) and

   that the control valve (2) can be manually adjusted between a first detent position for moving the yarn spreader (5) in, a second detent position for holding the latter and a third detent position for moving it out.
2. Texturing machine according to claim 1,
   characterised in that the control valve (2) is constructed as a 4/3-way valve.
3. Texturing machine according to any one of claims 1 and 2,
   characterised in that the slide element (14) can be locked.
4. Texturing machine according to claims 2 to 3,
   characterised in that a pilot valve (3) is provided, by means of which valve the control valve (2) can be controlled via an additional compressed-air connection (23) in the case of a power failure such that the yarn spreader (5) can be moved in.
5. Texturing machine according to claim 1,
   characterised in that the detent positions can be set by means of a tappet (16).
6. Texturing machine according to any one of claims 2 to 5,
   characterised in that the 4/3-way valve (2) comprises a control piston (15) which is formed as a double piston and controls the supply of compressed air (1) to the underside and/or the upper side of the magnetic piston, according to the detent position.
7. Texturing machine according to claim 6,
   characterised in that the detent grooves (17) are disposed between the tappet stem and the double piston and between pistons forming the double piston.
8. Texturing machine according to any one of claims 2 to 7,
   characterised in that the detent positions can in each case be set by means of a spring-loaded detent element (18, 26) which engages in a detent groove (17).
9. Texturing machine according to any one of claims 1 to 8,
   characterised in that the yarn spreader (5) causes a heating flap (44) of the heating device (8) to open or close, wherein the position of the yarn guide (6) is delivered as a control signal to a control device (37).
10. Texturing machine according to any one of claims 1 to 9,
    characterised in that the upper stop of the slide element (14) is formed by a contact switch (38), and that the contact switch (38) is connected to a control device (37) for opening and closing a heating flap (44) of the heating device (8).
11. Texturing machine according to claim 10,
    characterised in that the control device (37) comprises a 3/2-way valve (39) and a closing cylinder (40), wherein the 3/2-way valve (39) is actuated by the contact switch such that the pressure chamber (41) of the closing cylinder (40) is deaerated or connected to a pressure source (1).

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