DE20012778U1 - Bobbin changing device - Google Patents

Description

Applicant:

AUTEFA

automation GmbH Roentgenstr. 1-5 86316 Friedberg

Representative:

Patent Attorneys Dipl.-Ing. H.-D. Ernicke Dipl.-Ing. Klaus Ernicke Schwibbogenplatz 2b 8 6153 Augsburg / DE

Date:

File:

21.07.2000 727-130

DESCRIPTION

Bobbin changing device 5

The invention relates to a bobbin changing device for one or more bobbin devices with the features in the preamble of the main claim.

In practice, winding devices, so-called winders, are known for carpet yarn, which wind the carpet yarn into spools at high speed on two tubes, each one on a spool mandrel. The spool change is carried out manually, with the fully wound spools being pulled off the mandrel via a lifting drawer and placed in front of the winder for collection. The operator removes the spools, puts them in a grid trolley and replaces them with two new empty tubes on the spool mandrel. This spool change is problematic in terms of time and operational reliability. The manual collection must be carried out very punctually because the winder is already winding the next pair of spools on a second spool mandrel. When changing spools, the spool mandrels also move in an arc or circular path according to the increasing spool thickness. Another problem is the fact that several winders are usually arranged in several rows one behind the other and next to each other, whose winding times sometimes overlap. In addition, there is often little space on the winders for changing the bobbin. Another disadvantage is the high personnel costs.

It is the object of the present invention to show a better possibility for changing the spool.

The invention solves this problem with a bobbin changing device having the features in the main claim.

A stationary lifting doffer is arranged at each of the various spool devices, which automatically carries out the process with a spool changer and transfers the finished spools to a transport device for further transport, which is located high up in the area of the spool device and outside of its working area. This means that the spool change can be carried out very quickly, and the spools do not have to travel any great distances. They can be transferred to the transport device directly at the winder, so that the lifting doffer is immediately ready for the next spool change.

Preferably, each winding device or winder is assigned its own lifting doffer, whereby at least the winders in a row have a common transport device. This allows the bobbin change to take place independently. The transport device, which is preferably designed as a monorail system, is also able to pick up bobbins from lifting doffers at different points at the same time.

In a further embodiment, the spool changer can be equipped with a tube magazine and an automatic tube changer, so that refilling with empty tubes can also be done automatically and without manual intervention.

The lifting doffer is equipped with a preferably vertical support column and a carriage that can be raised and lowered on it. Due to the eccentric positioning of the support column and the floating carriage bearing, the access area at the front of the winder and in the area of the winding mandrels is only accessible during the bobbin tube change.

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blocked. When the wound spools are subsequently transferred to the transport device, the access area is free again. Due to the short cycle times when changing spools and the quick release of the access area, an operator can quickly get back to the winder if, depending on the type, additional manual work is required, e.g. clamping the new thread onto the empty tube or similar. The operator also has enough time for this during the winding time due to the short spool change times.

The bobbin changing device can have a safety device that allows access to the winder only when the carriage is raised and only when the machine is not changing bobbins and tubes. This is to prevent accidents and ensure operational safety.

A particular advantage of the bobbin changing device is its small space requirement, which enables it to be installed even when the winders are arranged closely together and also requires very little space in the aisle between the rows of winders. The bobbin changing device can therefore be retrofitted to existing systems. The bobbin changing device according to the invention requires only a small amount of construction and cost. This makes it particularly economical and efficient.

Further advantageous embodiments of the invention are specified in the subclaims. 30

The invention is illustrated by way of example and schematically in the drawings. In detail:

Figure 1: A bobbin changing device with a H-ubdoffer, a bobbin changer, a

Transport device and a partially broken off winding device in side view,

Figure 2: a front view of the arrangement according to

Arrow II of Figure 2 and

Figure 3: a plan view of the arrangement with several winding devices and lifting doffers in plan view according to arrow III of Figure 1.

In Figure 1, a bobbin changing device (1) and a winding device (2) are shown partially broken away. The winding device (2) is preferably designed as a so-called winder for carpet yarn, but can also have any other design. It is used to wind thread material, i.e. yarns, filaments or the like, onto empty tubes (21) to form bobbins (3). Instead of the tubes (21), other bobbin carriers can also be used if necessary. In the embodiment shown, the winder (2) has two winding mandrels (7, 8), on each of which two tubes (21) are placed one behind the other at a distance and are rotated by rotationally driven winding mandrels (7, 8). Appropriate tensioning devices are provided for this. Alternatively, there can also be more or fewer winding mandrels (8). The number of tubes (21) or bobbins (3) placed one behind the other can also vary.

Preferably, several winding devices (2) are arranged in one or more rows next to each other or one behind the other to form a system. Figure 3 shows a top view

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a section with two winding devices (2) arranged next to each other.

The bobbin changing device (1) preferably has a separate lifting doffer (4) for each winding device (2). This has a lifting guide (10) which is preferably designed as a substantially vertical support column and which is arranged laterally next to the access area (9) on the winding device (2). It is located

&iacgr;&ogr; also to the side next to the area of the winding mandrels (7,8) and the bobbins (3) there. A carriage (12) is mounted on the lifting guide (10), preferably in a floating manner, and can be moved back and forth along the lifting guide (10) via a lifting drive (11). In the preferred embodiment, it is raised and lowered. Above the winding device (2) or the winding mandrels (7,8) is the transport device (5), which is arranged in the area of the winding device (2) and the lifting doffer (4). The stationary lifting doffer (4) can transfer the picked-up bobbins (3) to the transport device (5) for further transport. This transfer takes place at a distance above the winding mandrels (7,8) and outside the access area (9) at the front of the winding device (2). Figures 1 and 2 show the carriage (12) in the lower and upper positions respectively.

Each lifting doffer (4) has a changer (15), the components of which are at least partially arranged on the carriage (12). The bobbin changer (15) has a device for taking over the fully wound bobbins (3) from the bobbin device (2) and for transferring these bobbins (3) to the transport device (5). In the embodiment shown, a transfer device (17) is arranged on the bobbin device (2) for this purpose, which, after releasing the clamping position, transfers the fully wound bobbins (3) from the bobbin mandrels (7, 8) to a receiving mandrel (14) on the carriage (12) and a bobbin holder (18) there.

A push-off device (16) is arranged on the carriage (12), which then pushes the spools (3) onto the transport device (5) and its spool holder (24) in the upper position shown in dashed lines. This separate arrangement of the devices (16, 17) allows the carriage (12) to be very light and small. It also has few moving parts and fewer drives.

In the preferred embodiment, the bobbin changer (15) also has an automatic tube changer (19) which is arranged on the carriage (12) together with a tube magazine (20) for several empty tubes (21). With the tube changer (19), tubes (21) can be put on and tensioned again after the bobbins (3) have been taken over onto the empty winding mandrel (7, 8).

In the preferred embodiment, the push-off device (16) and the push-over device (17) preferably consist of fork-shaped sliding grippers which are mounted so that they can move along the mandrels (7, 8, 14) via cylinders and guides and which reach behind the bobbins (3) for the respective push-over or push-off movement and push them preferably by resting on the protruding collars of the sleeves (21). The bobbin holder (18) can also contain a sliding device with which the receiving mandrel (14) can be moved horizontally back and forth in order to be able to connect closely to the winding mandrels (7, 8) or the bobbin holder (24) for the bobbin transfer. The sleeve changer (19) also has a similar sliding device.

The transport device (5) is preferably designed as a monorail system and spans several winding devices (2). It has, for example, a conveyor rail (22) on which several transport carriages (23) are guided and can be moved separately from one another via corresponding drives. Each transport carriage (23) has a

or several coil holders (24). As Figure 1 shows, the transport device (5) is arranged in the immediate vicinity of the stationary lifting doffer (4). In Figures 2 and 3, the transport device (5) or its conveyor rail (22) is symbolized by a dot-dash line.

The winding process preferably takes place continuously on the winding device (2). Two spools (3) are wound onto each spool mandrel (7, 8), while the other spool mandrel (8, 7) is ready with empty tubes (21) for the next winding process. The two spool mandrels (7, 8) rotate on an arcuate path, in particular a circular path, around a central, horizontal axis. This rotary movement can take place in accordance with the increase in thickness of the spools (3).

When two spools (3) have been wound, the thread material is cut or severed on the winding device (2) in a suitable manner, preferably fully automatically. The two spools (3) are then ready for the spool change. The lifting doffer (4) has a rest position in which the carriage (12) is in the raised position. To change the spools, the carriage (12) is lowered and its receiving mandrel (14) is brought to the height of the spool mandrel (7) ready for the change. The receiving mandrel (14) is then moved close to the spool mandrel (7), whereupon the transfer device (17) pushes the two spools (3) onto the receiving mandrel (14). The receiving mandrel (14) returns to its starting position.

The carriage (12) is then raised a little until the bobbin magazine (20) and the bobbin changer (19) are level with the now empty winding mandrel (7). In the magazine (20) two empty tubes (21) are available at a distance below the receiving mandrel (14), which are then pushed onto the winding mandrel (7) by the tube changer (19) after a corresponding axial feed. The tube changer (19)

has a clamping device with which it clamps the rear tube after positioning the front tube (21) and the one adjacent to the winding device (2) and then moves back a little with it. In the winding device (2) a tube stop located approximately in the middle of the winding mandrel (7) can then be extended, against which the bobbin changer (19) then pushes the rear tube (21). The empty tubes are then removed by a corresponding ^clamping device on the winding mandrel (7).

(21) and are ready for the next winding process. The core changer (19) slides back into the starting position, with two new cores (21) being made available from the core magazine (20) for the next changing process. The carriage (12) then moves upwards into the transfer position to the transport device (5). As soon as a transport carriage (23) is ready, the spool holder (18) extends the receiving mandrel (14) and the push-off device (16) pushes one or both spools (3) onto the spool holder (24), which is also provided with a mandrel. If the transport carriage (23) has two spool holders (24) next to each other in the conveying direction, it must move forwards a little to transfer the second spool. As soon as the spool transfer is finished, the spool holder (18) retracts into the starting position and the carriage (12) remains in the raised rest position until the next changing process. The transport device (5) then transports the received spools (3) in any suitable manner to a collection point, further processing or the like.

Preferably, the bobbin changing device (1) with the various lifting doffers (4), the transport device (5) and the winding device (2) with the transfer devices (17)~ have a common control (27), which is shown schematically in Figure 3. On this control

(27) the provision signals of the coil devices (2) for the fully wound coils (3) arrive, which

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whereupon the control (27) starts the associated lifting doffer (4) and its bobbin changer (15). At the appropriate time, the control (27) then also controls and operates the transfer devices (17) on the winders (2). A transport carriage (22) is then requested and made available via the control (27) for the bobbin change. The bobbin transfer to the transport device (5) can also take place with a slight time delay.

The bobbin changing device (1) can have a safety device (6). In the embodiment shown, this consists, for example, of several stationary barriers (25), e.g. fences, which protect the bobbin changing devices

(2) at least at their front access areas (9) and shield them from one another. The fences (25) also extend beyond the lifting doffers (4) and are each connected to a door (26) at the front, preferably an automatic sliding door. This sliding door (26) blocks the access area (9) in front of the winding devices (2) during the bobbin and tube change and during the time in which the carriage (12) is in the lower position in front of the winding mandrels (7,8). When the carriage (12) assumes the raised rest position, it sends a corresponding position signal to the control (27), which in turn is then connected to the safety device (6) and automatically opens the door (26). An operator can then access the freshly placed empty tubes (21) and, if necessary, carry out any operating work required by the winding device (2), e.g.

clamp the new thread to the empty tubes (21). The operator must then leave the access area (9) in good time before the next bobbin change, which is signaled and suggested to him in an appropriate manner by the safety device (6). The door (26) is then closed again for the next bobbin change process.

Modifications to the embodiment shown are possible in various ways. On the one hand, the lifting doffer (4) can also have a differently designed and aligned lifting guide

(10). Pivoting guides or the like are also possible here. Furthermore, a lifting doffer (4) can also serve several adjacent winding devices (2) if suitably designed and for this purpose can have a limited additional axis, a correspondingly pivoting carriage or the like. The design and arrangement of the various components of the bobbin changer (15) and in particular of the devices (16, 17, 18) is also variable. The automatic tube changer (19) with the tube magazine (20) can also be varied and, if necessary,

can also be omitted. The transport device (5) is also variable and can be designed in any other suitable way as a suspended conveyor or the like. In the preferred embodiment, it is arranged above the access area (9). Depending on the design of the winder and its arrangement, it can also be arranged to the side of the winding device (2), with the lifting doffer (4) and its lifting guide (10) being adapted accordingly. The safety device (6) can also be modified in its design and arrangement. It can also be omitted without replacement or only partially implemented. The common control (27) can also be designed and arranged differently. On the one hand, it can be integrated into a system-wide central process control. On the other hand, each lifting doffer (4) can also be assigned its own control, which in turn is connected to a central process control or the like in order to receive the provision signals for the wound coils (3) and the coil change. Likewise, the transport device

(5) and the safety device (6) are controlled independently and connected in a suitable manner to other controls or integrated into a control sequence.

that be.

LIST OF REFERENCE SYMBOLS

1 Bobbin changing device 2 Winder

3 Coil

4 lifting doffers

5 Transport device

6 Safety device 7 Winding mandrel

8 Winding mandrel

9 Access area

10 Lifting guide, support column

11 Lifting drive 12 Slide

13 Cable drag

14 Mandrel

15 bobbin changers

16 Push-off device Hubdoffer 17 Push-over device Winder

18 spool holders

19 Shell changer

20 shell magazine

21 Sleeve

22 Conveyor rail, monorail

23 transport trolleys

24 spool holder

25 demarcation, fence

2 6 doors

27 Control

Claims (9)

1. Bobbin changing device for one or more winding devices which wind thread material into bobbins, characterized in that the bobbin changing device ( 1 ) each has a lifting doffer ( 4 ) arranged stationary on the winding device ( 2 ) with a bobbin changer ( 15 ) and a transport device ( 5 ) for the bobbins ( 3 ) arranged high in the region of the winding device(s) ( 2 ). 2. Bobbin changing device according to claim 1, characterized in that the lifting doffer ( 4 ) has a lifting guide ( 10 ) arranged next to the access area ( 9 ) of the winding device ( 2 ) with a carriage ( 12 ) mounted on it in a floating manner and a lifting drive ( 11 ). 3. Bobbin changing device according to claim 1 or 2, characterized in that at least parts of the bobbin changer ( 15 ) are arranged on the carriage ( 12 ). 4. Bobbin changing device according to claim 1, 2 or 3, characterized in that the bobbin changer ( 15 ) has a transfer device ( 17 ) arranged on the winding device ( 2 ) for transferring bobbins to a bobbin holder ( 18 ) on the carriage ( 15 ) and a push-off device ( 16 ) arranged on the carriage ( 15 ) for delivering bobbins to the transport device ( 5 ). 5. Bobbin changing device according to one of claims 1 to 4, characterized in that the bobbin changer ( 15 ) has a tube changer ( 19 ) arranged on the carriage ( 15 ) and a tube magazine ( 20 ) for empty tubes ( 21 ). 6. Bobbin changing device according to one of claims 1 to 5, characterized in that the transport device ( 5 ) is designed as a monorail system and has a conveyor rail ( 22 ) with several transport carriages ( 23 ) mounted thereon so as to be independently movable and having one or more bobbin receptacles ( 24 ). 7. Bobbin changing device according to one of claims 1 to 6, characterized in that a securing device ( 6 ) for its access area ( 9 ) is arranged on each bobbin device ( 2 ). 8. Bobbin changing device according to one of claims 1 to 7, characterized in that the securing device ( 6 ) has a rigid barrier ( 25 ) and a controllable door ( 26 ) which is coupled to the lifting doffer ( 4 ). 9. Bobbin changing device according to one of claims 1 to 8, characterized in that the bobbin changing device ( 1 ) has several lifting doffers ( 4 ) with a common transport device ( 5 ) and a common control ( 27 ), which is also connected to the winding devices ( 2 ) and the securing device ( 6 ).