EP0916756A2 - False-twisting machine with pneumatic yarn insert guide - Google Patents

Abstract

The apparatus for yarn false twisting has a yarn layer which opens and closes a heating flap (44) at the heater (8). The position of the yarn guide is fed to the control (37) as a control signal. The upper limit stop of the sliding unit (14), for the yarn layer, is a contact switch (38) linked to the control (37) to open and close a heater flap at the heater (8). The control has a 3/2 path valve (39) and a closing cylinder (40), where the cylinder pressure zone (41) is evacuated or filled by a pressure supply (1). The sliding unit (14) is a magnet, which moves over the outer surface of a sleeve (26), and has an opposing polarity to the moving compressed air magnet piston within the sleeve. The magnet piston is controlled by a 4/3 path control valve, to move the sliding unit. The control valve is set manually between ratchet positions for the movement of the yarn layer to move in, be held in place and be moved out. The ratchet positions can be set by a push rod. The sliding unit can be locked.

Description

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

Texturing machines with height-adjustable thread feeders are further from the following Publications known. From DE-PS 23 48 322 a thread feeder is known which is a height-adjustable handrail with slide guide and a rope mechanism with deflection rollers to bridge larger operating heights described. The mechanism is relatively complicated and requires long operating paths in manual operation of the handrail and also requires additional 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 receiving Has thread guides. This manually operated thread feed rod requires also a high level of power and skill above all great heights of the machines.

From DE-PS 1 817 084 is a manually raised and lowered rod with one Gallows known for a thread guide. Again, it is for the operator required the rod manually with great strength and skill to raise or lower.

DE-AS 21 55 514 also has a manually displaceable rod Guides known as thread feeders.

All known texturing machines with the height-adjustable thread feeders of the State of the art is common, especially at high altitudes a relative great effort by the operator and a high level of skill Applying a thread from a lower thread threading position to an upper thread feeding position is required. The disadvantage of the known Texturing machines used mechanical thread feeder is that the The displacement of the operator bar extends up to approx. 1.20 m into the operator aisle. This relatively large bar must be moved by the operator.

It is therefore the object of the present invention to use a texturing machine to create height-adjustable thread feeder, which requires little effort and without great skill on the part of small distances to be covered Operator can be operated.

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 the thread over a Supply plant, the heating device, the cooling device, a false twister and a Deduction unit is led to a winding. Because in the event of a power failure Machine that can quickly melt or even burn the threads in the heaters, it is desirable to quickly remove all threads from the heaters. This is a The thread feeder is as easy to use as possible for the operator required. According to the thread layer causes the opening or closing a heating flap of the heating device, so that the position of the Thread guide can be fed as a control signal to a control device.

According to the invention, an upper stop of the sliding element is by a Contact switch formed, the contact switch with a control device for Opening and closing a heating flap of the heating device is connected.

For this purpose, the control device preferably has a 3/2-way valve and one Lock cylinder on, the 3/2-way valve with the contact switch such is controlled that a pressure chamber of the lock cylinder is vented or with a Pressure source is connected.

Due to the advantageous design of the upper stop, in which preferably a Contact switch is integrated, control pulses can be sent to a control device Opening and closing a heating flap of the heating device can be transferred. Thus, the operator can use both the thread feeder and the heating flap Control once actuation of a control valve. Here it is particularly of Advantage if the heating flap is adjusted with a compressed air Control device takes place. The supply of the thread feeder and the control device can be done with a pressure source.

The thread feeder preferably has a sliding element with at least one Magnet on 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-guided magnetic piston can the sliding element with the thread guide be moved into a desired position or by appropriate Circuit can also be kept in this.

The control of the compressed air supply to the respective side of the guided in the sleeve Magnetic piston takes place in particular 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. To do this, the 4/3-way valve can be manually switched between one first stop position for retracting or lowering the thread guide, one 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. By The various rest positions will be the supply of compressed air from one Compressed air source on the top or bottom or on the top and bottom of the magnetic piston realized. When the compressed air is on the top of the magnetic piston is supplied in the sleeve, the magnetic piston in the sleeve of shifted downwards, 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, during the duration of the compressed air supply, the magnetic piston moves from the bottom to the bottom moved up, which causes the thread guide to be extended. If the second Rest position is selected, compressed air is both on the top of the Guided magnetic piston as well as on the underside of the magnetic piston, whereby, due to the prevailing pressure equalization between the top and the Bottom of the magnetic piston in the sleeve, the thread feeder in this position is held. This stop position can be during the retracting stroke as well during the extension stroke of the thread feeder in any position along the Sleeve are activated.

According to a further exemplary embodiment, it is also used to control the 4/3-way valve In addition, a 2/2-way valve is provided, which has a separate Control device is controlled. This 2/2-way valve comes with an additional Compressed air connection connected to the 4/3-way valve, so that in the event of a power failure The 4/3-way valve can be controlled via this additional compressed air connection in such a way that the thread guide is retractable. This is important in the event of a power failure as a result Due to their heat capacity, the heaters maintain their temperature for a relatively long time. Of the Thread that is no longer conveyed can thus come into contact with the heater surfaces reach and thereby melt or burn, which is why it is important that with such a power failure the thread easily, relatively quickly and can be easily led out of the heater or also from the cooling device can. 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, i.e. be Control piston controlled, this control piston is designed as a double piston and depending on the locking position, the supply of compressed air to the bottom and / or to Controls the top of the magnetic piston. The different locking positions of the ram are close enough to each other and only need to be spaced apart Correspond to pistons of the double piston, so that the corresponding supply lines or Derivatives 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 are spring-loaded Engage locking elements so that they snap into place by moving the plunger into the desired locking groove. The direction of actuation is included according to the desired direction of movement of the thread guide. Under direction of operation is to understand the direction in which the plunger is pressed or pulled must become.

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

Further advantages, features and possible uses of the invention will be now using exemplary embodiments in conjunction with the drawings explained.

Fig. 1

ein pneumatisches Schaltbild eines 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 (Einfahren) des Steuerventils;

Fig.6

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

Fig. 7

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

Show it:

Fig. 1

a pneumatic circuit diagram of a 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

3 in a third latching position (retracting) of the control valve;

Fig. 6

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

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 pneumatically actuated thread feeder 5. A compressed air source 1 is via a 4/3-way valve 2 connected to the thread feeder 5. The thread feeder 5 has a sleeve in which a piston rodless by pressurization Magnetic piston can be moved up and down. On the outside of the sleeve is a Sliding element 14 slidably attached as a magnet, which has a polarity that is different is that of the magnetic piston inside the sleeve. This will make the External circumference of the sleeve attached magnet or Gleitelememt 14 at Pressurization of the magnetic piston moves up and down inside the sleeve. On the outer circumference of the sleeve slidably arranged sliding element 14 is a Thread guide 6 arranged by means of which the thread in the heating device 8 or Cooling device 9 can be inserted.

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

Fig. 2 shows the basic structure of a texturing machine, in which each corresponding job of the thread 10 from the payout spool 34 via a delivery unit 11, which consists of corresponding conveyor rollers, a heating device 8 fed. At the end of the heating device 8 there is a deflection roller 36, above which the thread 10 runs and is deflected so that it is then in a cooling device 9 occurs. From the cooling device, the thread 10 is one False twist 31 and a take-off unit 12, from where it is wound up 13 is supplied. Alternatively, the thread 10 can pass through in front of the delivery mechanism 12 another heater 33 are performed. 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 Operating aisle 35, the thread feeder 5 is shown. The elongated rod is formed as a sleeve 26, which has a connection plug for compressed air on one side and which on its other side, i.e. the lower side in Fig. 2, the actual 4/3-way valve 2 which can be actuated by a tappet 16. That at the Sliding element 14 guided on the outside of the sleeve 26, on which the thread guide 6 is shown in Fig. 2 in the uppermost position. The top position corresponds the position in which the control valve receives compressed air from the compressed air source for so long 1 has fed to the bottom of the magnetic piston 7 until this in the Sleeve in its uppermost position in contact with the inlet plug or in one outer stop is.

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. This control valve will depend on Position of a double piston formed by two single pistons 15 a feed line to the underside of a rodless magnetic piston 7 or to the top of this Guided magnetic piston 7, which in a cylindrical sleeve 26th is led. In opposite polarity to the polarity of the magnet of the magnetic piston 7, a sliding element 14 is slidably on the outer circumference of the sleeve 26 with magnets on which the actual thread guide 6 with deflection roller 36 is appropriate. The magnetic piston 7 has a plurality arranged parallel to one another Ring magnets 29. In contrast, the ring magnets 28 in the outer jacket Sliding element 14 arranged. In the 4/3-way valve 2 is a compressed air connection 20 for the connection of the compressed air source 1 with the control valve, a compressed air connection 21 for the connection of the control valve 2 with the upper side of the magnetic piston 7 via a compressed air connection piece 24 on the top of the sleeve 26 for loading the top of the magnetic piston, a compressed air connection 22 for Actuation of the magnetic piston 7 from the bottom and a compressed air connection 23 for automatic retraction of the thread guide, i.e. to remove of the thread from the heating device 8 or the cooling device 9 is provided. Of the Double piston 15 of the control valve 2 also has a tappet 16 Push handle open. Between the double piston 15 and the tappet handle are in the tappet 3 locking grooves 17 incorporated, which correspond to 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 acted upon ball 18, which corresponds to a respective locking position Locking groove 17 engages and locked this respective locking position. The one shown in Fig. 3 first latching position corresponds to 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 Underside of the magnetic piston 7 is applied, whereby it is extended, i.e. is moved from bottom to top. 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 moves 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 28 sliding on the outside thereof thus becomes the thread feeder 6 moved synchronously with the movement of the magnetic piston 7.

Fig. 4 corresponds to the arrangement of FIG. 3, but in which the plunger 16 in the second latching position, which is the holding of the position of the thread guide 6 corresponds. When the ball 18 is engaged with the spring 19 in the second locking groove 17 is, the pressure ports 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 upon 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. Thereby prevails both on the top and on the bottom of the magnetic piston 7 same pressure, whereby the magnetic piston and thus the thread guide 6 in the position.

Fig. 5 shows the thread feeder according to FIG. 3, but in a third locking position of the Ram 16. This third locking position, in which the ball 18 with spring 19 in the third Locking groove engages, causes the compressed air connection 22 with the ventilation channel 30 is connected 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 space located between the individual pistons 15 of the double piston interconnected so that compressed air from the compressed air source 1 directly over the Connection piece 24 reaches the top of the magnetic piston 7, whereby this is moved together with the thread guide 6 from top to bottom.

So that all threads can be quickly removed from the heaters in the event of a power failure, to prevent them from burning, the control valve 2 is with another Compressed air connection 23 connected to the face of the double piston in a chamber flows. If this compressed air connection 23 with compressed air, preferably from the Pressurized compressed air source 1, so the double piston without manual support shifted to the third latching position shown in Fig. 5, 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 is a laser arranged transversely to the thread feeder 5, so that the laser beam the position of the can capture each thread feeder 5. This can be done through surveillance the actual position of the thread guide 6, but this can also be done via the Detection of 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 to fix the corresponding locking positions in the area between the two Piston 15 of the double piston. A locking pin 27 serves as locking elements depending on the locking position engages in the corresponding locking groove 17.

The sleeve 26 of the thread feeder 5 is preferably made of metal; in yet preferred embodiment, the sleeve 26 consists of a stainless steel tube. However, it is also possible to form the sleeve 26 from a plastic tube. In any case the tube is inserted in an aluminum profile. Preferably, the Compressed air lines cast into the profile itself. At one end it is Control valve arranged with the plunger 16 or the shift rod. On the opposite At the end there is the compressed air connection 24, via which a pressure connection to the pressure source 1 is realized. The aluminum profile is preferably as Extruded profile formed.

FIG. 7 shows how the thread feeder 5 according to the invention with its sliding elements 14 abuts an upper stop. The stop is preferably by a contact switch 38 is formed. The contact switch 38 is with a Control device 37 connected. The control device 37 consists of a Control valve 39 and a lock cylinder 40. In the position shown, the Control valve 39 by means of the contact switch 38 in its left switching position postponed. The contact switch 38 receives its switching pulse from the Sliding element 14. In the left switching position of the control valve 39, which acts as a 3/2-way valve is carried out, compressed air source 1 with the pressure chamber 41 of the Lock cylinder 40 connected. The lock cylinder 40 is by means of it Piston rod 42 is connected to the heating flap 44 of the heating device 8. At Pressurization of the pressure chamber 41 extends the piston and thus closes the heating flap 44. 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 In this case, control device 37 has two control valves 39, each of can be controlled by a contact switch. Each contact switch 38 forms the Stop for the respective thread feeder of threads 10.1 and 10.2. At this The heater flap 44 is closed only in the event that both Thread guides or sliding elements 14.1 and 14.2 are in their stops. As soon as a sliding element 14 or thread guide removed from the stop, the control valve switched to its right switch position. In this switch position the Pressure chamber 41 of the lock cylinder 40 is vented, so that the heating flap 41 Heating device 8 is opened or remains open. So the thread 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 (13)

Texturing machine with several workstations, in which at each workstation a thread (10) is fed via a delivery unit (11), a heating unit (8), a cooling unit (9), a false twister and a take-off unit (12) to a winding (13) ,
and in which a height-adjustable thread feeder is provided for applying a thread (10) in the heating device (8) and / or cooling device (9),
the thread feeder (5) having a height-adjustable sliding element (14) to which a thread guide (6) is attached,
characterized in that
the thread feeder (5) opens or closes a heating flap (44) of the heating device (8), the position of the thread guide (6) being fed as a control signal to a control device (37). Texturing machine according to claim 1,
characterized in that
the upper stop of the sliding 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). Texturing machine according to claim 2,
characterized in that
the control device (37) has a 3/2-way valve (39) and a locking cylinder (40), the 3/2-way valve (39) being controlled with the contact switch (38) in such a way that a pressure chamber ( 41) of the locking cylinder (40) is vented or connected to a pressure source (1). Texturing machine according to claim 2,
characterized in that
that the sliding element (14) is a magnet which is slidably mounted on the outer surface of a sleeve (26) and whose polarity is opposite to that of a rodless magnetic piston (7) guided by compressed air inside the sleeve (26). Texturing machine according to claim 4,
characterized in that
the magnetic piston (7) can be controlled by means of a control valve (2) for moving the sliding element (14). Texturing machine according to claim 5,
characterized in that
the control valve (2) is designed as a 4/3-way valve. Texturing machine according to claim 5 or 6,
characterized in that
the control valve (2) is manually adjustable between a first locking position for retracting, a second locking position for holding and a third locking position for extending the thread feeder (5). Texturing machine according to one of claims 4 to 7,
characterized in that
that sliding element (14) can be locked. Texturing machine according to claim 5 to 8,
characterized in that
A pilot valve (3) is provided, by means of which the control valve (2) can be controlled via an additional compressed air connection (23) in the event of a power failure in such a way that the thread feeder (5) can be retracted. Texturing machine according to claim 7,
characterized in that
the locking positions are adjustable by means of a plunger (16). Texturing machine according to one of claims 6 to 10,
characterized in that
the 4/3-way valve (2) has a control piston (15) which is designed as a double piston and, depending on the detent position, controls the supply of compressed air (1) to the underside and / or to the top of the magnetic piston. Texturing machine according to claim 11,
characterized in that
the locking grooves (17) are arranged between the plunger handle and the double piston and between the pistons forming the double piston. Texturing machine according to one of claims 6 to 12,
characterized in that
the locking positions can each be adjusted by means of a spring-loaded locking element (18, 26) engaging in a locking groove (17).

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