WO2003000577A1

WO2003000577A1 - Device for receiving a material web, damping device and method for inserting a material web into one such device

Info

Publication number: WO2003000577A1
Application number: PCT/EP2002/006481
Authority: WO
Inventors: Paul Süss
Original assignee: Solipat Ag
Priority date: 2001-06-25
Filing date: 2002-06-13
Publication date: 2003-01-03
Also published as: EP1270471A1

Abstract

The invention relates to a device for receiving a material web, said device comprising a plurality of rotatably positioned rollers (2,3). First rollers (2) are arranged in a fixed manner. Second rollers (3) are arranged in such a way that they can be displaced in one direction (R), between an insertion position (E) and an operating position (B). The material web (W) can be drawn through the first and second rollers (2,3), in the insertion position (E), in an essentially straight manner. In the operating position (B), the material web (W) alternately winds round the first and second rollers (2,3). The first and second rollers are respectively arranged in at least two interspaced (a, b) groups (P, P´). As a result, the length of the material web which can be received in the device (1) can be increased, without having to increase the outer dimensions of the device. The inventive device (1) is preferably provided with means for damping the material web (W).

Description

Device for receiving a web, damping device and method for inserting a web into such a device

The invention relates to a device for receiving a web, a damping device for steaming a web and a method for inserting a web into such a device.

Dampers are often installed in textile machines, for example in washing machines. A continuously guided material web is to be exposed to a saturated steam atmosphere in a steaming compartment. For this purpose, it is already known to loop the material web several times around rotatably mounted rollers. The residence time of the web in a steaming compartment with predetermined external dimensions can be increased. A disadvantage of such vapors is that the introduction of the web is relatively time-consuming. The web has to be wrapped around each roller.

So-called goods stores are also known in textile machine construction. In order to temporarily accommodate a certain length of a web or to create a buffer for different goods and discharge speeds, it is known to loop the web several times around rotatably mounted rollers. A first group of rollers is fixed. A second group of rollers can be moved transversely to the web direction. In an insertion position, the displaceably arranged rollers are arranged below the fixedly arranged rollers, so that a material web is carried out precisely between the group of fixedly arranged and the group of displaceably arranged rollers can. The slidably arranged rollers are then shifted upward transversely to the direction of the web so that the web is wrapped around the rollers. In this way, the length of goods that can be accommodated in a compartment is increased. By adjusting the distance between the fixed and the slidably arranged rollers, a compensation can be achieved if the feed speed and the take-off speed of the goods are not identical. The material web can therefore be temporarily stored in such a device.

These devices also have various disadvantages. In particular, the quantity of goods that can be stored in this way is limited. A length of goods can be accommodated per pair of fixed and movably arranged rolls, which corresponds to approximately twice the distance between these rolls. However, the distance between the rollers cannot be increased arbitrarily, since otherwise the forces acting on the web would be too great.

It is an object of the present invention to avoid the disadvantages of the known, in particular thus to create a device for receiving a web, in which the longest possible web length can be accommodated in a compartment with a predetermined size. The web of material should be able to be inserted into the device simply and without great manual effort.

Another object of the invention is to provide a damping device for steaming a web, in which the web can be inserted in a simple manner. It should be possible to treat the largest possible length of material in a steaming compartment with predetermined dimensions, or should the dwell time of the web in a damper with predetermined dimensions can be increased.

Another object of the invention is also to provide a damping device as a component of a textile machine, in which the web of material, if no damping is desired, can be passed directly through the damping device, i.e. without wrapping.

According to the invention, these objects are achieved with a device for receiving a web, a damping device and a method for inserting a web into such a device with the features of the independent claims.

The device for receiving a web has a plurality of rotatably mounted rollers around which the web can be guided. Here and in the following one generally speaks of a material web. Material web is understood to mean all types of flat structures, in particular textile webs such as woven or knitted fabrics, but also other continuously conveyed or conveyable goods, for example a group of threads.

First rollers are fixed in the device and second rollers are slidably arranged in the device. Here and in the following, first and second rollers are understood to be rollers which are arranged fixedly or displaceably. The second rollers are displaceably arranged between an insertion position and an operating position such that, in the insertion position, the material web can be carried out essentially straight between the first and second rollers and that in the operating position the material web alternately wraps around the first and second rollers. In this context, the operating position means a position at a distance from the insertion position. The operating position can also change in operation (eg to compensate for speed differences between web feed and removal). The second rollers can be moved in a direction transverse to the web in the insertion position. In this context, cross does not mean parallel to the web. Typically, the direction of displacement is approximately perpendicular to the web in the insertion position.

The first and second rollers are each arranged in at least two groups. The at least two groups of the first rollers and the at least two groups of the second rollers are each arranged at a distance from one another, each group preferably being arranged approximately in one plane. These levels run approximately parallel to one another and parallel to the web in the insertion position. The planes are defined by the axes of the rollers. The first and second rollers are aligned with each other in the direction of displacement of the second rollers.

This device has several advantages. When the device is in the insertion position, the web can be easily and essentially straight between a group of first and second rollers. The web can then be passed between a further group of first and second rollers.

The second rollers can then be moved into the operating position. This results in the material web being wrapped around the first and second rollers, which increases the length of the goods that can be accommodated in the device. Because the first and second rollers are each arranged in at least two groups and aligned with one another in the direction of displacement of the second rollers, the individual are interleaved Loops of the material web without, however, making the insertion process substantially more difficult.

The goods are bound through the device. It is not necessary to provide a large distance between the fixed and the movably arranged rollers in order to accommodate a sufficient web length in the device. A sufficient length of the goods that can be picked up is already achieved by nesting. If a textile machine is to be operated with such a device without increasing the dwell time of the goods in the device, it can be operated with the device in the insertion position. The material web is then simply passed directly through the device without wrapping.

According to a preferred embodiment, the device according to the invention is provided with a sump for steaming the web. The sump is designed in a manner known per se as a basin for holding water, which can be evaporated by supplying heat.

According to a further preferred embodiment, the second rollers can be moved together. Wrapping the web around the plurality of rollers is thereby simplified. The operating position can be reached by moving all the second rollers together. The two rollers are preferably mounted on both sides on a slide which is displaceable in the device. The carriage can have recesses running in the direction of displacement in the region of the first rollers. The slide can thus be arranged within a housing for the device without the fixed, first rollers hindering the displacement process. The distance between groups with rollers of the first type or rollers of the second type is advantageously approximately the same. In a preferred exemplary embodiment, the second rollers can be displaced by a distance which corresponds at least approximately to twice the distance between adjacent groups of a specific roller type, ie of first rollers or of second rollers.

An odd number of groups or levels with first rollers and of groups or levels with second rollers is advantageously provided. Typically five groups can be provided. An odd number of groups means that the material web can be fed on one side of the device and removed on the other side of the device. For example, in each case with five groups of fixedly arranged and displaceably arranged rollers, the material web is guided twice through the device in the insertion position and back again and then again through the device.

The operating position can also be adjustable. This means that depending on the length of the material web to be accommodated in the device or depending on the desired dwell time, the second rollers can be shifted into a corresponding position and that the device can be operated in this way.

According to a further aspect of the invention, a steaming device for steaming a web is proposed. The damping device has in a known manner a plurality of rotatably mounted rollers around which the web can be guided. The steaming device is also provided with a sump for steaming the web. A device of the type described above can typically be used. According to the damping device has a group of first, fixed rollers and a group of second, transverse to the web so displaceably arranged between an insertion position and an operating position that in the insertion position the web can be passed straight between the first and second rollers and that in the operating position the web alternately wraps around the first and second rollers. According to this aspect, therefore, a web store is used, each with fixed and displaceable rollers lying approximately in one plane in a damping device. Of course, designing the goods store with a plurality of groups of first and second rollers arranged at a distance from one another is particularly advantageous for the above reasons.

To introduce the web into the aforementioned device, the web is first carried out between a group of fixedly arranged rollers and a group of slidably arranged rollers. This process is repeated for at least one further level of first and second rollers. The second rollers are then moved in such a way that the web alternately wraps around the first and second rollers.

The invention is explained in more detail below in exemplary embodiments and with reference to the drawings. Show it:

FIG. 1 shows a schematic illustration of a textile machine with a device according to the invention,

FIG. 2 side view of a device according to the invention in the insertion position,

FIG. 3 shows an enlarged illustration of a slide for receiving the slidably mounted rollers, FIG. 4 side view of the device according to the invention in the operating position,

Figure 5 View of the device according to the invention in the running direction of the web and

Figure 6 side view of an alternative embodiment of a damping device according to the invention.

Figure 1 shows a textile machine 10 which is provided with various components known per se. The textile machine 10 has a device 1 which serves to accommodate a certain length of a web.

The device 1 is shown in FIG. 2 in a side view.

The device 1 is provided with first rotatably mounted rollers 2, which are arranged in a fixed position. The device 1 also has rotatably mounted second rollers 3 which can be displaced in a direction R. The first rollers 2 are arranged in five groups P. A group P of first rollers 2 lies in one plane. The second rollers 3 are also arranged in five groups P ^λ . Each group P lies on one level. The distance between adjacent groups P of first rollers 2 (or between the axes) is each a. The distance between adjacent groups P ^λ of second rollers 3 is b. The distances a, b are of equal size in the exemplary embodiment shown, but this is not mandatory. In the exemplary embodiment according to FIG. 2, five groups of first rollers 2 and five groups of second rollers 3 are shown. However, a different number of groups is also conceivable. In FIG. 2, the device 1 is in an insertion position E. A material web W can be inserted around a deflection roller 8 and can be passed through the device 1 between the lowest group P ^λ of second rollers 3 and the lowest group P of first rollers 2. The web of material is then carried out between the second and first rollers 2, 3 from further groups P, P, the web of material being passed back and forth twice through the device 1. The introduction of the material web W is simple, since the material web only has to be pulled back three times through the device and twice before it is led away from the device 1 in the region of a second deflecting roller 8. Wrapping is not necessary.

The slidably mounted second rollers 3 are arranged on a carriage 5. The carriage 5 is shown schematically in Figure 3. The carriage 5 has brackets 9 which are designed in the manner of tines. Each holder 9 carries a series of second rollers 3. By moving the carriage 5, the rollers 3 can be moved together in relation to the device 1. Recesses 6 are provided between the brackets 9. The first rollers 2, which cannot be moved relative to the device 1, are arranged in the region of the cutouts 6. The carriage 5 can therefore be displaced without the displacement process being hindered by the first rollers 2.

In order to increase the length of the web W that can be accommodated in the device 1, the second rollers 3 are displaced in the direction of displacement R. The second rollers 3 reach an operating position B (see Figure 4). In the operating position B, the second rollers 3 are displaced by a displacement distance d with respect to the insertion position E (see FIG. 2). For each pair of rollers from a first roller 2 and from a second roller 3, the length of the web that can be accommodated in the device 1 can be increased by almost twice the displacement distance d. Since several groups of first rollers 2 or second rollers 3 are provided at a distance from one another, the recordable length of material web per unit length of the device 1 can be increased several times without the displacement distance d having to be increased. Because five groups of first rollers 2 and five groups of second rollers 3 are provided in the exemplary embodiment according to FIGS. 2 and 4, the length of the web that can be taken up can also be almost five. The web is wound in individual loops around the rollers 2, 3. Due to the arrangement of rollers in several superimposed levels, the individual loops are nested one inside the other. The material web W first runs zigzag-like (according to the illustration in FIG. 4) from right to left through the device and then runs twice in a corresponding number of zigzag loops from left to right and from right to left before it around the deflection roller 8 ^{λ is} guided away from the device 1. In the exemplary embodiment shown, the length L of the device can be, for example, 2.5 meters. The distance 1 between corresponding first rollers 2 and second rollers 3 is somewhat less than the displacement distance d. In the exemplary embodiment shown, the distance 1 is, for example, 1.35 meters, so that a loop length of 2.7 meters results from a pair of first rollers 2 and a second roller 3. In the exemplary embodiment shown, 110 meters of goods can be stored in a device with a length L of 2.5 meters.

A sump 4 is optionally arranged below the web W in the device according to FIGS. 2 and 4. A liquid F, typically water, can be held in the sump 4 and heated so that it evaporates. The device 1 can be In this case, operate as a damper, the length of time of the web W in the damper, which is only 2.5 meters long, can be increased to 90 seconds at a web speed of 70 m / min. Thanks to the relatively short length between two successive loops of 1.35 meters, the web W runs essentially bound through the device 1, so that the forces acting on the web W remain below tolerable limits. If necessary, the rollers can be driven at least in part.

The device 1 is arranged in a housing 7.

In Figure 5, the device 1 is shown in the direction of movement of the web W. The first, fixedly arranged rollers 2 are rotatably mounted on two side walls 11 of the housing 7. The displaceable rollers 3 are arranged on a carriage 5 which is arranged within that of the housing 7. The carriage 5 can be moved in the direction R on rails. The carriage 5 can be operated pneumatically or hydraulically or electrically, for example.

The group P, P ', of first rollers 2 and second rollers 3 run horizontally in the exemplary embodiment according to FIGS. 2 and 4. The axes of the rollers 2, 3 run exactly in these planes. Deviations from the horizontal or arrangements of rollers of a group slightly outside a plane are also conceivable within the scope of the invention. The displacement direction R runs vertically in the exemplary embodiment according to FIG. 2/4. Deviations are also conceivable here without departing from the scope of the invention.

An alternative exemplary embodiment of a damping device 1 is shown in FIG. A sump 4 is arranged in a housing 7. assigns. A liquid F is provided in a basin, which can be evaporated by heating. This creates a saturated steam atmosphere inside the housing. A material web W is guided into the housing 7 via a first deflection roller 8 and out of the housing 7 via a second deflection roller 8. Similar to the previous exemplary embodiments, rotatably mounted rollers 2, 3 are also provided here. First rollers 2 are fixed. Second rollers 3 are arranged to be displaceable in a displacement direction R. 6 is only a group P of first rollers 2, which lie in one plane and a group P ^λ of second rollers 3, which are in one plane. The web W shown in solid lines can be carried out between the first rollers 2 in the plane P and the second rollers 3 in the plane P when the second rollers 3 are in an insertion position E. So that the dwell time of the web W in the device 1 can be increased, the second rollers 3 are moved in the shifting direction into an operating position B. In the operating position B, the web W ¹ (shown in dashed lines) is guided back and forth in loops between the first rollers 2 and the second rollers 3.

Claims

claims

1. Device (1) for receiving a web (W),

with a plurality of rotatably mounted rollers (2, 3) around which the web (W) can be guided,

wherein first rollers (2) are arranged fixedly in the device (1) and second rollers (3) are arranged displaceably between an insertion position (E) and an operating position (B) such that in the insertion position (E) the web (W ) can be carried out essentially straight between the first and the second rollers (2, 3),

and that in the operating position (B) the material web (W) alternately wraps around the first and second rollers (2, 3),

and wherein the first and second rollers (2, 3) are each arranged in at least two groups (P, P ^Λ ) arranged at a distance (a, b) from one another.

2. Device according to claim 1, characterized in that the device is provided with means, in particular with a sump (4) for steaming the web (W).

3. Device according to one of claims 1 or 2, characterized in that the second rollers (3) are displaceable together.

4. The device according to claim 3, characterized in that the second rollers (3) are mounted on both sides on a sliding carriage (5). Apparatus according to claim 4, characterized in that the carriage (5) in the region of the first rollers (2) in the direction of displacement (R) has cutouts (6).

Device according to one of claims 1 to 5, characterized in that the second rollers (3) are displaceable by a displacement distance (d) which is at least approximately twice the distance (a, b) between adjacent groups

(P) from first rollers (2) or between adjacent groups

(P ^λ ) of second rollers (3).

Device according to one of claims 1 to 6, characterized in that an odd number of groups (P, P ^λ ) with first and second rollers (2, 3) are provided, preferably five groups (P, P *).

Device according to one of claims 1 to 7, characterized in that the operating position (B) is adjustable.

Damping device (1) for steaming a web (W), with a plurality of rotatably mounted rollers (2, 3) around which the web (W) can be guided and with means, in particular a sump (4) for steaming the web, in particular with a device for receiving the web according to one of claims 1 to 8,

characterized in that the damping device has a group (P) of first, fixed rollers (2) and a group (P ^x ) of second rollers (3) which can be displaced between an insertion position (E) and an operating position (13) that in the insertion position (E) the web (W) can be carried out substantially straight between the first and second rollers (2, 3) and that in the operating position (B) the web (W) alternately wraps around the first and second rollers (2, 3)

10. Device according to one of claims 1 to 9, characterized in that the device is designed such that it can also be operated in the insertion position (E).

11. A method for introducing a web (W) into a device according to one of claims 1 to 8, characterized by the steps

(a) passing the web (W) between a group (P) with fixed rollers (2) and a group (P *) with slidably arranged rollers (3)

(b) repeating step (a) for at least one further group (P, P ¹ ) each of first and second rollers (2, 3)

(c) Shifting the second rollers (3) such that the web (W) alternately wraps around the first and second rollers (2, 3).