DE20120110U1 - Device for winding a web - Google Patents

Abstract

The machine for reeling a web material involves a feed (3,3'') for driving a cardboard reel (4) to cause the web to wind up. A first reeling roller (1) moves over the web path. A second horizontal reeling roller (2) engages the reeled material and can move with respect to the first roller. A new reel can be guided from below against the web path (5) so that the web can be fed onto the new reel.

Description

Device for winding a web of material

The invention relates to a device for winding a web of material according to the preamble of claim 1.
5

In web processing machines, a device for winding the continuously transported, wide web of material is provided at the outlet end. The web of material is wound onto a winding body, for example a cardboard tube, to form a roll of material. In order to ensure continuous operation of the web processing machine, it must be ensured that the finished roll of material is deposited after the web of material has been cut crosswise and that a new winding body is provided and wound on.

From DE-A-36 29 216 a device for winding a web of material is known which has a swivel frame which carries at its upper end, via a rotary axis, two support arms arranged in pairs and working in turning mode. The two opposite ends of the two-armed support arms each have holders for rotatably receiving and supporting a winding body on which the web of material coming from the handling machine is wound into a roll. A horizontally aligned pressure roller is also provided, via which the web of material is fed to the winding body and which is in supporting contact with the roll of material.

As soon as the fabric roll is finished, the swivel frame is swivelled away from the pressure roller and the two support arms are rotated by about 180° so that a new winding body comes into contact with the fabric web.

After the swivel frame is swiveled back, the web is cut crosswise and the new winding body is wound.

Although this known device enables smooth and continuous operation, extremely powerful motors are required to pivot the swivel frame and rotate the support arms.

The device disclosed in EP-B-O 424 423 for winding a new empty winding body to replace a full roll of fabric takes a different approach by dispensing with the pivoting frame with the two-armed support arms. In the device according to EP-B-O 424 423, the device for winding a web of fabric essentially consists of a device for feeding a winding body onto which the web of fabric is wound to form a roll of fabric, a first, horizontally aligned winding roller, via which the web of fabric is fed to the winding body, and a second, horizontally aligned winding roller, which is in supporting contact with the roll of fabric and can be pivoted away from the first winding roller together with the finished roll of fabric. In addition, the roll of fabric is guided in guide rails at the ends of the winding body.

In this known device, a new winding body is guided from above against the winding track, so that the web of material guided above over the first winding roller is transferred to the new winding body. Furthermore, a device is provided below the web of material, with the help of which the cut end of the web of material

around the new winding body. The mechanism required for this is relatively complex, but does not guarantee safe and good winding.
5

The invention is therefore based on the object of improving the device for winding a web of material according to the preamble of claim 1, in particular with regard to a more reliable winding behavior.
10

According to the invention, this object is achieved by the features of claim 1.

The device according to the invention for winding a web of material essentially consists of a device for feeding a winding body onto which the web of material is wound to form a web of material, a first, horizontally aligned winding roller, via which the web of material is fed to the winding body, and a second, horizontally aligned winding roller, which is in supporting contact with the web of material and can be pivoted away from the first winding roller together with the finished web of material. The device for feeding the winding body is arranged according to the invention in such a way that a new winding body is guided against the web of material from below, so that the web of material guided from below around the first winding roller is transferred to the new winding body and partially wraps around it.

The tests on which the invention is based have shown that the solution according to the invention enables improved winding. In addition, a significantly better winding hardness can also be achieved.

Further embodiments of the invention are the subject of the subclaims.

According to the invention, a counter-holding device is further provided which can be moved back and forth between a rest position and a working position, wherein during a movement from the rest position to the working position it comes into contact with the web of material in such a way that the wrap angle of the web of material around the new winding body increases.

Furthermore, a device for cross-cutting the web is expediently provided in an area between the swiveled-out web and the new winding body.

In a special embodiment of the counterholding device, it has a front contact area and a rear contact area, whereby the web of material is guided over the front and rear contact areas in the working position of the counterholding device. The device for cross-cutting the web of material is then advantageously arranged on the other side of the web of material with respect to the counterholding device and interacts with the counterholding device in such a way that the web of material is cut in the area between the front and rear contact areas of the counterholding device.

In a particularly advantageous embodiment of the counter-holding device, this has a support arm, at one end of which a double-armed lever arm is pivotally mounted, which at one end supports the

whose contact area at one end and the rear contact area at its other end, wherein the web of material is guided over the front and rear contact areas in the working position of the counter-holding device.
5

In a further embodiment of the invention, the front contact area in the working position of the counter-holding device points into the downwardly open gusset formed by the first winding roller and the new winding body, wherein this front contact area is designed as a nozzle that can be acted upon by compressed gas in order to blow the cut end into the gusset formed between the first winding roller and the new winding body after the web has been cross-cut.

Further advantages and embodiments of the invention are explained in more detail below with reference to the description of two embodiments and the drawing.
20

Show in the drawing

Fig.l is a schematic side view of the winding device during winding,
25

Fig.2 is a schematic side view of the winding device with the fabric roll swung away,

Fig.3 a schematic side view of the winding device with the counter-holding device pivoted in,

Fig.4

Fig.5

Fig.6

a schematic side view of the winding device shortly before the cutting process,

a schematic detailed view of the counterholding device during the cutting process,

a schematic side view of the winding device in the initial stage of the new fabric winding,

Fig.7

Fig.8

Fig.9

a sectional view of the feeding device in the area of one end of a winding body,

a schematic side view of the winding device in the winding position according to a second embodiment and

a side view of the winding device according to Fig.8 in the cutting position.

The winding device according to Fig. 1 consists essentially of a device 3 for feeding a winding body 4, onto which a web of material 5 is wound to form a web of material 6, a first, horizontally aligned winding roller 1, via which the web of material 5 is fed to the winding body 4, and a second, horizontally aligned winding roller 2, which is in supporting contact with the web of material 6 and can be pivoted away from the first winding roller together with the finished web of material (see Fig. 2).

5 ·>'&Ggr; . ^s · i &iacgr; :

Furthermore, a counter-holding device 7 is provided which can be moved back and forth between a rest position (Fig. 1) and a working position (Fig. 4), whereby during a movement from the rest position to the working position it comes into contact with the web of material in such a way that the wrap angle of the web of material around the new winding body 4 increases (see Fig. 5).

The counter-holding device 7 has a front contact area 7a and a rear contact area 7b, whereby the web of material is guided over the front and rear contact areas in the working position (Fig. 5) of the counter-holding device. The counter-holding device 7 also consists of a support arm 7c which is pivotally mounted about an axis 7d and which pivotally mounts a double-armed lever arm 7e at its end opposite the axis 7d. As can be seen in particular from Fig. 5, the front contact area 7a is formed at one end and the rear contact area 7b at the other end of the double-armed lever arm 7e.

Furthermore, a device 8 for cross-cutting the web of material 5 is provided in an area between the pivoted-off web 6 and the new winding body 4, while the counter-holding device 7 is arranged above the web of material 5, the device 8 for cross-cutting the web of material is located below the web of material, with both devices interacting in such a way that the web of material is cut in the area between the front and rear contact areas 7a, 7b of the counter-holding device (see Fig. 5).

In the present embodiment, the device 3 for feeding a winding body provides a lifting device (see Fig. 3) with which a new winding body 4 is gripped from a magazine 9 and the new winding body is guided against the web 5 from below by means of the lifting device.

To grip a new winding body 4, the feed device has two holding means designed as sleeves 3b, which can be inserted laterally into the winding body 4 as shown in Fig.7. The sleeves and thus the winding body 4 can be driven by a drive 10 which is only indicated schematically.

The operation of the winding device is explained in more detail below using Fig. 1 and 7:

In the winding position according to Fig. 1, the web of material 5 is fed to the first winding roller 1 via a deflection roller 11. The web of material guided from below around the first winding roller 1 is transferred to the winding body or the fabric roll being formed. The fabric roll being formed is supported by the first and above all by the second winding roller 2. At the beginning of the winding phase, the winding body 4 is guided laterally by the holding means 3b. The winding process and in particular the winding hardness can be controlled in a targeted manner by means of the winding body's own drive.

As the diameter of the product roll 6 increases, the guide rails 12 take over the guidance of the product roll, whereby the ends of the winding body come into contact with the guide rails.

- ■ 9 -

medium 3b are then pulled off to the side and brought into a waiting position.

The peripheral speed of the first winding roller 1 corresponds to the speed of the web in the treatment device. The peripheral speed of the second winding roller can, if it is equipped with an individual drive, be driven with advance or retardation in order to influence the winding strength.

When the fabric roll 6 has reached the desired diameter, it is swiveled away with the aid of an adjusting device 13 together with the second winding roller 2, as can be seen in Fig. 2. A new winding body 4 is guided from the magazine 9 against the fabric web 5 from below with the aid of the feed device 3, so that the fabric web 5 guided from below around the first winding roller 1 is transferred to the new winding body 4 and partially wraps around it.

Then the counterholding device 7 is pivoted in according to Fig.3, with its support arm being aligned so that the counterholding device with its front contact area 7a first comes into contact with the web 5. Then the support arm 7c is rotated into position according to Fig.4, with the front contact area 7a of the counterholding device pointing into the downwardly open gusset 16 formed by the first winding roller 1 and the new winding body 4, so that the wrap angle of the web 5 around the new winding body 4 increases (see Fig.4).

The cutting process takes place immediately thereafter within fractions of a second (see Fig. 4 and 9), whereby the device 8 for cross-cutting the web of material is moved back into the waiting position according to Fig. 1 to 4 immediately after the cutting process.

The material web 5 is shown in Fig. 5 before the cutting process by a dot-dash line. The two ends 5a and 5b of the material web resulting from the cutting process are shown in dashed lines. While the end 5b is wound onto the material roll 6 by the drive of the second winding roller 2, the new winding body 4 is wound onto the other end 5a. The directions of rotation of the first winding roller 1 and the new winding body 4 are shown by the arrows 14 and 15.

As can be seen in particular from Fig. 5, the new winding body 4 is already wrapped around approximately three quarters of the material web 5 with the aid of the counter-holding device 7. In order to facilitate the introduction of the end 5a of the material web into the gusset 16 formed between the first winding roller 1 and the new winding body 4, the front contact area 7a of the counter-holding device is designed as a rounded strip with an approximately triangular cross-section. The front contact area is also provided with nozzles 17 which can be pressurized with compressed gas. By applying appropriate compressed air after the cutting process, the cut end of the material web is blown into the gusset 16, which significantly assists the winding process.

- Ii -

After winding has been completed, the counter-holding device 7 is also rotated back to its rest position, while at the same time the finished roll of fabric 6 is deposited in a device not shown in detail. The winding roller 2 is then pivoted with the guide rails 12 into an intermediate position in order to continue the winding (see Fig. 6). As soon as a predetermined diameter of the newly wound roll of fabric is reached, the winding roller 2 is pivoted back into the winding position according to Fig. 1.

The two winding rollers 1, 2, the counter-holding device 7 and the device 8 for cross-cutting the web are designed for a maximum working width. Only the holding means designed as sleeves, the guide rails 12 and the magazine 9 must be adjustable to possibly smaller working widths.

The device 8 for cross-cutting the web is usually provided with rotating cutting knives (see Fig. 5). However, fixed knives are also conceivable in this context.

A further embodiment is shown in Figs. 8 and 9. It differs from the first embodiment essentially only in the device ³¹ for feeding a new winding body 4. Instead of the lifting device 3a according to the first embodiment, a swivel arm 3'a is provided here, which enables a somewhat more compact design. During the winding process, the new winding body 4 is taken out of the magazine 9 with the swivel arm 3'a and brought into the waiting position according to Fig. 8.

When the fabric roll 6 has reached the desired diameter, it is swiveled away so that the winding body 4 in the waiting position is rotated into the winding position according to Fig.9.
5

The holding means 3'b designed as sleeves are arranged as a separate device above the web and are then pivoted downwards in order to receive the winding body 4 in the winding position.

The counter-holding device 7 is then pivoted in, the cutting, the winding, the turning back of the counter-holding device and the depositing of the roll of fabric take place in the manner already shown above with regard to the first embodiment.

Both embodiments are characterized by improved winding behavior.

Claims (17)

1. Device for winding a web of material ( 5 ), with - a device ( 3 , 3 ') for feeding a winding body ( 4 ) onto which the web of material is wound to form a roll of material ( 6 ), - a first, horizontally aligned winding roller ( 1 ) over which the web is fed to the winding body, and - a second, horizontally aligned winding roller ( 2 ) which is in supporting contact with the fabric roll and can be pivoted away from the first winding roller together with the finished fabric roll, - characterized in that the device for feeding the winding body ( 4 ) is arranged such that a new winding body is guided from below against the web of material ( 5 ), so that the web of material guided from below around the first winding roller ( 1 ) is transferred to the new winding body ( 4 ) and partially wraps around it. 2. Device according to claim 1, characterized by a counter-holding device ( 7 ) which can be moved back and forth between a rest position and a working position, wherein during a movement from the rest position to the working position it comes into contact with the web of material ( 5 ) in such a way that the wrap angle of the web of material around the new winding body ( 4 ) increases. 3. Device according to claim 1, characterized by a device ( 8 ) for cross-cutting the web of material in a region between the pivoted-off roll of material ( 6 ) and the new winding body ( 4 ). 4. Device according to claim 2, characterized in that the counter-holding device ( 7 ) has a front contact region ( 7a ) and a rear contact region ( 7b ), the web of material ( 5 ) being guided over the front and rear contact regions in the working position of the counter-holding device. 5. Device according to claim 2, characterized by a device ( 8 ) for cross-cutting the web of material, which is arranged on the other side of the web of material ( 5 ) with respect to the counter-holding device ( 7 ). 6. Device according to claim 4, characterized by a device ( 8 ) for cross-cutting the web of material, which is arranged on the other side of the web of material ( 5 ) with respect to the counter-holding device ( 7 ) and cooperates with the latter in such a way that the cutting of the web of material takes place in the region between the front and rear contact region ( 7a , 7b ) of the counter-holding device. 7. Device according to claim 2, characterized in that the counter-holding device ( 7 ) has a support arm ( 7c ), at one end of which a double-armed lever arm ( 7e ) is pivotally mounted, which has a front contact area ( 7a ) at one end and a rear contact area ( 7b ) at its other end, the web of material being guided over the front and rear contact areas in the working position of the counter-holding device. 8. Device according to claim 7, characterized in that the front contact region ( 7a ) of the counter-holding device ( 7 ) is formed by a rounded strip which is approximately triangular in cross section. 9. Device according to claim 4, characterized in that the front contact region ( 7a ) in the working position of the counter-holding device ( 7 ) points into the downwardly open gusset ( 16 ) formed by the first winding roller ( 1 ) and the new winding body ( 4 ). 10. Device according to claim 4, characterized in that the front contact area ( 7a ) in the working position of the counter-holding device ( 7 ) points into the downwardly open gusset ( 16 ) formed by the first winding roller ( 1 ) and the new winding body ( 4 ), and this front contact area is designed as a nozzle ( 17 ) to which compressed gas can be applied in order to blow the cut end ( 5a ) into the gusset ( 16 ) formed between the first winding roller and the new winding body after the web has been cross-cut. 11. Device according to claim 1, characterized in that the winding body ( 4 ) has its own drive. 12. Device according to claim 1, characterized in that the feeding device ( 3 ) has a lifting device ( 3a ). 13. Device according to claim 1, characterized in that the feeding device ( 3 ') has a pivoting arm (3'a). 14. Device according to claim 1, characterized in that the fabric roll ( 6 ) is in supporting contact with the first and the second winding roller ( 1 , 2 ) during winding. 15. Device according to claim 1, characterized in that the second winding roller ( 2 ) has its own drive. 16. Device according to claim 1, characterized in that guide rails ( 12 ) are also provided for guiding the ends of the winding body ( 4 ). 17. Device according to claim 1, characterized in that the feed device has two holding means ( 3b ) which can be inserted laterally into the winding body ( 4 ) in order to hold it.