EP1215316B1 - Apparatus for extracting residual packages or empty tubes from a creel - Google Patents

Abstract

The extraction unit (12), to remove partially-wound bobbins and empty bobbin sleeves from a creel, has at least one powered conveyor roller (13) which, in the extraction position, has a friction contact with the outer side of the bobbin or sleeve (3) and carry them clear of their spindles (6). The mechanism to extract partially-wound bobbins and empty bobbin sleeves from a creel, acts with bobbin spindles moved into a horizontal plane. The conveyor unit is placed under the horizontal bobbin/sleeve, as at least one conveyor roller, with its rotary axis across the spindle. The extraction unit has a ramp in front of the roller, in relation to the direction of spindle movement, to lift the bobbin/sleeve. The ramp is a component part of a roller table (22), with an opening (21) for the roller to pass through partially and act on the bobbin/sleeve surface. The table is sprung vertically, to lie against bobbins/sleeves of different diameters. The extraction unit is moved from its working position into an inactive rest position, outside the movement range of the spindles. The creel is a V-type with two V-shaped bobbin carriers, each with a number of bobbin carrier tubes on continuous chains moved from a working position at the outer side of the creel to a doffing position at the inner side of the creel. The spindles are on a number of creel levels. An extraction unit is at the inner side of the creel, for each bobbin carrier, which moves from the working position at the peak of the V-creel parallel to the bisection of the V-shape into a rest position against the open side of the V-creel. The bobbin/sleeve extraction unit is moved on a vertical carrier to the required creel level. The carrier is on a chassis which can be driven over the uppermost creel level at a carrier from the extraction position into the rest position. A curtain, at least at the extraction position, is between neighboring extraction units to deflect the removed bobbin/sleeve downwards, and a curtain also protects the extraction units from the ejected bobbins/sleeves. A catch trough under the extraction units takes the falling bobbins/sleeves, to be carried away by a conveyor belt. The extraction unit is tensed against the spindle movement in the extraction position, so that an emergency switch is tripped if there is a collision between a bobbin or sleeve and the extraction unit. A sensor is in front of the extraction unit, in the movement zone of the spindles, to generate a signal on detecting a full bobbin or a bobbin sleeve with residual wound yarn.

Description

The invention relates to a device for discharging residual spools or empty tubes on a creel according to the preamble of claim 1. With such a device, the bobbin change to a warping or warp gate is to be simplified by the not completely exhausted residual bobbins before the refitting of a coil board Empty tubes are automatically discharged to avoid laborious manual work.

There are already known generic comparable devices in which a discharge device is provided in the range of movement of the spindles to automate the discharge process. Thus, for example, by EP-A-652309 a device has become known in which in the range of motion of the bobbin for each spindle row connected to a spring device impact element is arranged, which cooperates with the bobbin such that it can be biased by their movement and that after passing through a triggering position, the spring device is so relaxed that the impact element emits a force pulse in the direction of the nearest spindle or an attached thereto residual coil or empty tube. This simple device works very reliable and can be easily retrofitted to the creel.

From EP-A-0 474 990 a similar device is known in which the sleeves are displaced from the spindles to the transport mandrels of an endless conveyor by means of an actuatable slider.

In certain cases, however, it is necessary that coils with an even considerable amount of yarn or almost full bobbins are to be removed by hand, since they can not be thrown off with the discharge device. The known discharge devices are usually fixed and can not be disabled easily. It is therefore an object of the invention to provide a device of the type mentioned, which not only gently discharges the remaining coils or empty tubes, but which can be deactivated in a simple manner, if a drop or a discharge is not desired or not possible.

This object is achieved according to the invention with a device having the features in claim 1. The drivable conveying means of the discharge device acts frictionally on the outside of the remaining coils or the bobbin tubes and can thus be relatively easily deactivated by a relative displacement. Remaining coils with a residual application in a range of up to 15mm can be easily removed from the spindles. In addition, the discharge takes place gently and reliably.

A particularly simple arrangement results when the spindles are movable on an approximately horizontal plane and when the conveying means is arranged in the discharge position below the plane of movement of the spindles. It is sufficient in this case the weight of the remaining coils or empty tubes to be detected by the conveyor and transported away. Of course, it would also be conceivable that the remaining coils or empty tubes are clamped by two funding, to achieve a defined frictional engagement.

The conveying means is preferably at least one conveying roller whose axis of rotation extends transversely to the spindles in the discharge position. To increase the friction, the roller on the surface of a plastic material or of rubber and / or it may be structured. So a discharge is possible, the roller must be apparent to apply a force component which is parallel to the spindles. The roll axis does not necessarily have to be arranged at right angles to the spindles. Instead of rollers, the conveyor could also consist of a conveyor belt.

A particularly reliable discharge is achieved when a ramp for lifting the remaining coils or empty tubes is arranged on the discharge device relative to the direction of movement of the spindles in front of the conveyor roller. To secure the coils when unwinding the threads bends or lugs are arranged at the ends of the spindles. To overcome this obstacle, therefore, a slight lifting of the remaining coils or empty tubes is required, which is realized by means of the ramp in the simplest way.

The ramp is advantageous part of an opening provided with a roller table, under which the conveyor roller is mounted such that a segment protrudes through the opening on the roller table. The roller table thus leaves just as much of the roller free, as is required for the discharge movement. At the same time it serves as a support for the remaining coils or empty tubes to be discharged.

The roller table can be mounted resiliently in the vertical direction such that its relative position can be adapted to different outer diameters of residual coils or empty tubes. This can be expedient particularly in those cases in which residual bobbins are not to be removed manually, but also with the discharge device. Since the residual yarn application can be different, the outer diameters can turn out very differently, which can be compensated by the resilient mounting of the roller table. For one optimal operation, it is particularly advantageous if the discharge from the discharge position in a rest position outside the range of movement of the spindles is movable. The discharge can thus be delivered if necessary and does not interfere with the operation in the rest position.

The movable discharge device is particularly suitable for use on a V-gate with two V-shaped coil carrying devices, each coil carrying device comprises a plurality of bobbin tubes that are movable at endless train chains from the operating position on the gate outer side in the changing position on the gate inside and have the spindles on several gate floors. In this case, a discharge device is arranged on the gate inside for each bobbin carrying device, which is movable from the discharge position at the top of the V-gate approximately parallel to the bisector of the V-gate in the rest position against the open side of the V-gate. Thus, it is particularly easy to achieve an overlap of the discharge device with the range of movement of the spindles, which can be reversed by retracting the discharge against the open side of the gate.

The discharge device may be adjustable on at least one vertical support on different gate floors, wherein the vertical support is secured to a chassis or on a carriage or the above the uppermost gate day on a carrier from the discharge position to the rest position movable or displaceable. The discharge can be brought in this way quickly by motor to the desired location, with a remote control is conceivable.

Advantageously, at least in the region of the discharge position, a curtain is arranged between the two discharge devices, which deflects the discharged residual bobbins or empty tubes downwards. This also prevents the remaining coils or empty tubes of the two gate sides, which move toward one another, from colliding with one another.

In addition, in addition to the discharge position to protect the bobbin devices before discarded residual coils on each gate side can be arranged in each case a curtain near the bobbin carriers. In this way, no discarded remaining coils or empty tubes can fall into the range of motion of the bobbin carrying device.

Below the two discharge devices advantageously a pit for receiving the discharged residual coils or empty tubes is arranged. These can be transported away with a conveyor belt which is arranged at the bottom of the pit.

A particularly high degree of operational safety is achieved when the discharge is biased under a direction opposite to the direction of movement of the spindles biasing force in the discharge position, and when an allowable counterforce in the event of a collision of a residual coil or a bobbin with the discharge an emergency switch for switching off the Coil carrier device is actuated. This reliably prevents damage. The bias can be effected for example by spring force or pneumatically. A slight relative displacement of the discharge against the biasing force can be sufficient to actuate the emergency switch and trigger the machine stop.

Residual spools are particularly easy to remove manually, if in the range of movement of the spindles before the discharge a sensor is arranged, which generates a signal when detecting full bobbins or sleeves with a yarn application. This signal can cause a stop of the bobbin carrying device and at the same time a driving away of the discharge device in the rest position. This eliminates the need for visual monitoring of the discharge process.

It is also possible that a remaining spool with excessive yarn application or a full spool pushes the discharge device against a biasing force (pneumatic or mechanical) in the rest position and generates a stop of the Spulenaustragsvorrichtung by the displacing into the rest position discharge device actuates a limit switch.

Figur 1

eine schematische Darstellung eines V-Gatters mit endlosen Spulentragvorrichtungen,

Figur 2

eine Seitenansicht auf ein Spulentragrohr mit zwei bestückten Spindeln,

Figur 3

eine Seitenansicht auf eine Spindel mit zugestellter Austragvorrichtung,

Figur 4

eine Ansicht aus Pfeilrichtung A auf die Anordnung gemäss Figur 3,

Figur 5

eine Draufsicht auf die Spitze des V-Gatters gemäss Figur 1 mit zwei Austragvorrichtungen für jede Gatterseite,

Figur 6

eine Seitenansicht des Traggestells für die Austragvorrichtung gemäss Figur 5, und

Figur 7

eine Ansicht in Pfeilrichtung B auf das Gestell gemäss Figur 6.

Further advantages and individual features of the invention will become apparent from the following description of an embodiment and from the drawings. Show it:

FIG. 1

a schematic representation of a V-gate with endless bobbins,

FIG. 2

a side view of a Spulentragrohr with two equipped spindles,

FIG. 3

a side view of a spindle with an attached discharge device,

FIG. 4

a view from the direction of arrow A on the arrangement according to Figure 3,

FIG. 5

a top view of the tip of the V-gate according to Figure 1 with two discharge devices for each gate side,

FIG. 6

a side view of the support frame for the discharge device according to Figure 5, and

FIG. 7

a view in the direction of arrow B on the frame according to Figure 6.

Figure 1 shows schematically the top view of a known creel 1 in a V-shaped arrangement. Each gate side is provided with endless pull chains 7 on which the bobbin tubes 23 (FIG. 2) are arranged. The chains thereby form coil-carrying devices 5 and 5 ', which are transported from an operating position 8, in which the threads are withdrawn, in the transport direction T in a change position 9, in which 11 new coils 4 are plugged from a bobbin supply. Relatively close to the Kettenumlenkrädern 10, which are seen in the transport direction between the operating position 8 and the change position 9, and which divide the transport chain into corresponding Kettentrums, the discharge device according to the invention in the region of the tip 24 of the gate is arranged. The open gate side is designated 25 and the bisector 26 between the two gate sides corresponds to the direction of movement on which the discharge devices can be moved to a rest position.

Figure 2 shows a portion of a vertical Spulentragrohrs 23 with two spindles 6. The ends of the spindles are provided with a nose 16. The upper spindle carries an empty tube 3 and the lower spindle a residual coil 2, which still has a specific Has yarn residue order. The empty tube 3 is shown in a position that it must take, so that it can be removed via the nose 16. In contrast, the remaining coil 2 shows the actual rest position on the spindle, which occupies it under the action of gravity and in which it would be prevented by the nose 16 at a removal.

FIGS. 3 and 4 show the basic principle of the discharge device according to the invention. The conveying means in this case consists of a conveying roller 13, which is mounted below a roller table 22 such that a segment of the roller surface protrudes through an opening 21 above the roller table. The roller is rotatably drivable in the direction of arrow a about its axis 15 with a motor 18. The roll table 22 runs on one side into a ramp 20, the function of which will be described below.

The spindles 6 on the bobbin carrier move in the direction of arrow b on a plane of movement 19. The roller table 22 is arranged at a distance from the plane of movement 19 that an incoming empty tube 3 runs on the ramp 20 and is lifted by this. In this case, the empty tube is brought into a position in which they can not be retained by the nose 16. As soon as the empty tube comes into the effective range of the roller 13, there is a transport away from the spindle in the direction of arrow c.

The discharge position 14 of a discharge device 12 relative to the bobbin carrying device 5 is shown in more detail in FIG. For reasons of clarity, a coil carrier device 5 'is shown here only on one side. In contrast, a discharge device 12,12 'is provided for each gate inner side, wherein the pair on a carrier 27 from the discharge position 14 is movable in a rest position 17. The spindles 6 run over the rollers at an angle which is slightly smaller than 90 °. Evidently, the kinematics of the spindles causes a lateral relative movement of the remaining coils or empty tubes on the roll surface. However, the rolls are of sufficient length to ensure complete removal before the spindles leave the area of influence of the rolls.

The discharge devices 12, 12 'can be biased in the direction of the arrow d under a biasing force, so that they are forced away in the event of a collision with a full spool. About the relative displacement, an emergency switch can be actuated. In the direction of movement in front of a discharge device 12, a sensor 32 can be arranged, which detects full bobbins or a residual order of yarn. In the rest position 17, the discharge devices are evidently outside the range of movement of the spindles 6, so that they are easily accessible for a manual removal of residual spools.

From Figures 6 and 7, further details of the storage of the discharge devices can be seen.

On a frame 29, the carrier 27 is mounted above the uppermost gate floor in the middle of the V-gate. The two discharge devices 12,12 'are attached to a vertical support 30 and adjustable in this direction in the direction of arrow e on different gate floors. The vertical support is attached to a trolley 28 which is guided on the carrier 27. Instead of the trolley and a slide would be conceivable that can be moved over a rack or a cable.

The collecting pit 34 with the conveyor belt 35 is shown only symbolically in FIGS. 6 and 7. Similarly, the curtain 36 between the two sides of the gate for deflecting the discharged residual coils and empty tubes, and the two curtains 37,37 '(Figure 5) to prevent residual coils fall into the bobbin carrying device

Claims (15)

1. Device for the discharge of bobbins with residual threads or empty bobbins on a bobbin creel (1), comprising a moving bobbin carrying device (5, 5') on which several spindles (6) are arranged to hold bobbins (4), whereby the bobbin carrying device can be moved from a working position (8) for unwinding the bobbins to a changing position (9) for reloading the spindles, wherein a discharge device (12) is provided in the movement area of the spindles, and wherein the discharge device (12) has at least one driven conveyor (13), characterized in that in one discharge position (14), the driven conveyor (13) is in frictional contact with the outside of the bobbins with residual threads (2) or the bobbin cases (3) and transports these away from the spindles (6).
2. Device according to Claim 1, characterized in that the spindles (6) can be moved on a roughly horizontal plane (19) and that in the discharge position (14) the conveyor (13) is located underneath the movement plane of the spindles.
3. Device according to Claim 1 or 2, characterized in that the conveyor (13) is at least one conveying roll whose pivot axis (15) in the discharge position runs at right angles to the spindles (6).
4. Device according to Claim 3, characterized in that a ramp (20) for lifting the bobbins with residual threads or empty bobbins is arranged on the discharge device (12) upline of the conveying roll (13) relative to the direction of movement of the spindles (6).
5. Device according to Claim 4, characterized in that the ramp (20) is part of a roll table (22) provided with an opening (21), under which the conveying roll (13) is mounted in such a way that a segment protrudes over the roll table through the opening.
6. Device according to Claim 5, characterized in that the roll table (22) is spring-mounted in vertical direction in such a way that its relative position can be adapted to different outside diameters of bobbins with residual threads or empty bobbins.
7. Device according to one of Claims 1 to 6, characterized in that the discharge device (12) can be moved from the discharge position (14) into a rest position (17) outside the movement area of the spindles (6) .
8. Device according to Claim 7, characterized in that the bobbin creel (1) is a V-creel with two bobbin carrying devices (5, 5') arranged in a V-shape, whereby each bobbin carrying device has a plurality of bobbin carrying tubes (23) that can be moved on the endless draw chains (7) from the working position (8) on the outside of the creel to the changing position (9) on the inside of the creel and have spindles (6) on several creel tiers, and that a discharge device (12, 12') for each bobbin carrying device is arranged on the inside of the creel that can be moved from the discharge position (14) at the tip (24) of the V-creel roughly parallel to the bisecting line (26) of the V-creel into the rest position (17) against the open side (25) of the V-creel.
9. Device according to Claim 8, characterized in that the discharge device (12, 12') can be adjusted to different creel tiers at least at one vertical girder (30), and that the vertical girder is attached to a chassis (28) that can be moved from the discharge position to the rest position above the uppermost creel tier on a girder (27).
10. Device according to Claim 8 or 9, characterized in that at least in the area of the discharge position, a curtain (33) is arranged between the two discharge devices (12, 12') that diverts the discharged bobbins with residual threads or empty bobbins downwards.
11. Device according to one of Claims 8 to 10, characterized in that in the area of the discharge position, a curtain (37, 37') is arranged on each side of the creel near the bobbin carrying devices to protect the bobbin carrying devices (5, 5') from discharged bobbins with residual threads.
12. Device according to one of Claims 8 to 11, characterized in that a pit is arranged below the two discharge devices (12, 12') to receive the discharged bobbins with residual threads or empty bobbins.
13. Device according to Claim 12, characterized in that the discharged bobbins with residual threads or empty bobbins can be transported away by means of a conveyor belt.
14. Device according to one of Claims 1 to 13, characterized in that the discharge device is preloaded in the discharge position under a preloading force in the opposite direction to the direction of movement of the spindles, and that on exceeding an admissible counter-force in the event of a collision between a bobbin with residual threads or empty bobbin and the discharge device, an emergency switch can be actuated to switch off the bobbin carrying device.
15. Device according to one of Claims 1 to 14, characterized in that a sensor is arranged in the area of movement of the spindles (6) upline of the discharge device (12) that generates a signal on detection of full bobbins or bobbins with residual threads.

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