GB2291860A

GB2291860A - Web winding machine

Info

Publication number: GB2291860A
Application number: GB9514014A
Authority: GB
Inventors: Dieter Duppengiesser; Armin Hutzenlaub
Original assignee: Kampf GmbH and Co Maschinenfabrik
Current assignee: Kampf GmbH and Co Maschinenfabrik
Priority date: 1994-07-27
Filing date: 1995-07-10
Publication date: 1996-02-07
Anticipated expiration: 2015-07-10
Also published as: GB2291860B; ITMI951470A1; GB9514014D0; ITMI951470A0; DE4426492A1; IT1275500B; DE4426492C2

Description

TITLE Web Winding Machine 2291860 This invention relates to a machine for

winding webs of material and having winding stations for winding mainly narrow webs of material, particularly of plastic, paper or the like, with base structures carrying the winding arms of the winding stations, the said base structures being displaceably mounted on a linear guiding means of a supporting traverse and lockable thereon. Winding machines of this kind are known in the art. The winding arms can be constructed either as rigid arms for centre winding in which the drive is confined to the winding centre, or as pivotable arms for central and peripheral winding in which a combined drive is provided at the centre and on the periphery. The winding web width is altered by linear displacement of the winding arms on the supporting traverse, transversally to the winding direction.

In a system described in DE 43 03 971A, three linear guides are provided for the purpose of guiding the base structures on the supporting traverse of a winding machine with individual winding stations. An additional fourth linear guide is required on a vertical side of the supporting traverse for an adjusting device, by means of which an adjusting block, connected to the base structure by a system of rods, can be adjusted.

An object of this invention is to provide a web cutting machine having winding stations for winding mainly narrow webs of material which, while maintaining a stable supporting system for the winding arms, will not only make it possible to wind particularly narrow webs but will also provide means for rapidly setting or readjusting the cutting widths and effecting control of the opening and closing movements of the winding arms in a simple manner for the purpose of changing the winding cores.

According to this invention there is provided a web winding machine with winding stations for winding up narrow webs of material, the machine having a base supporting winding arms of the winding stations, the said base being displaceably mounted on a linear guide of a supporting traverse and capable of being locked thereon, wherein the base of each winding station, as seen in plan view, being formed by substantially step- shaped supporting plates which engage one another and of which one plate has in the zone of a first linear guide a narrow side having at least one bearing element and provided in the zone of a second linear guide with a wider side having at least two bearing elements, the other supporting plate being provided in the zone of the first linear guide with a wider side having at least two bearing elements and in the zone of the second linear guide with a narrower side having at least one bearing element, and wherein, for the purpose of limited linear displacement of the supporting plates and of the winding arms associated therewith, a cylinder-piston unit is provided associated with each supporting plate and which is mounted in an adjusting block substantially parallel to the linear guides and lockable by a braking device on the supporting traverse.

The means according to this invention provide a web cutting machine through which, by the skillful arrangement on different sides of at least one and at least two bearing elements in the side zone of the respective two supporting plates, the distance between them can be further reduced, so that even narrower webs of material can be wound while at the same time, due to the distribution of the bearing elements according to this invention, the tilting moments and load moments accompanying the winding process can be satisfactorily taken-up. As a result of the cylinder and piston ram unit also provided and the braking device included, the supporting plates can be adapted without difficulty to the particular web width desired, while the opening and closing movement of the winding arms resting on the supporting plate structure is adjustable to a fine degree.

In a preferred embodiment of this invention supporting plates of a winding station which interact in pairs have zones adjustable in opposite directions, i.e. in addition to the side zones having the bearing elements, a receiving zone preferably of the same width for both supporting plates and serving for the winding arms and an adjusting zone situated on one common side. The piston-cylinder unit is situated in the adjusting zone and is provided with a cylinder occupying a fixed position on the adjusting block and with a piston adjustable therewith by means of a pressure fluid medium, such as air, and with rods extending therefrom on both sides and mounted in holding elements which in the adjustment zone of the supporting plates are affixed to arms on the said plates which are associated with each other fork-wise in respective pairs. This arrangement of the cylinder-piston units in the zone of the adjusting block, which in its turn is positioned between the bifurcated arms of the supporting plates, results in a particularly compact construction.

It is an important factor that the distance between the arms of each supporting plate and/or the holding elements affixed thereto correspond to the width of the relevant adjusting block and/or of the adjusting stroke required for releasing and clamping winding reels secured between the winding arms of any mutually adjacent supporting plates. Thus, on the side of a wider winding arm provided with a drive for a winding core the adjusting stroke may be greater than on the side of the winding arm associated therewith and designed as a narrow supporting arm. At all events the adjustment stroke must be selected to ensure that in the case of winding stations immediately succeeding one another in a row the winding arms of adjacent supporting plates will not collide with one another on the opening stroke.

In a further simplified structure the adjusting block and the braking device form a constructional unit, preferably in such a way that the cylinder-piston unit is situated in the upper zone and the braking device in the lower zone of the adjusting block.

In a further embodiment of the invention the adjusting block which is manually displaceable in a direction substantially parallel to the linear guide is provided with two frame plates situated a distance apart which enclose the piston-cylinder unit between them and which, in the zone of the braking device, extend around a supporting body which is provided, on the side opposite to the bearing, an operating device with a braking surface interacting with a brake plate.

A preferred embodiment according to this invention is shown by way of example in the accompanying drawings and described hereinafter in detail.

In the drawings:- Figure 1 shows a general plan view of a winding station of a web cutting machine, Figure 2 shows a side view of the machine in Figure 1 ' Figure 3 shows a front view of part of the adjusting device, Figure 4 shows a perspective view of an alternative constructional version of a supporting plate, Figure 5 shows a securing device for positioning and securing the winding stations on the supporting plates and shown in an initial position, and shows the securing device of Figure 5 in a clamped position. shows a winding station 1 of a web cutting is not illustrated in detail and which is up preferably narrow webs of material, Figure 6 Figure 1 machine which used to wind 7 - particularly of plastic, paper or the like. The individual winding station has a base structure in the form of supporting plates 2 engaging one another in a stepped manner, the supporting plate 2 shown on the left side in Figure 1 serves to accommodate one winding arm, not shown in the drawing, while the supporting plate 2 on the right side serves to accommodate another winding arm, likewise not shown, these arms forming the winding station. The winding arms may take the form of rigid arms for a central driven winding system or else of pivotable arms for a central and peripheral driven winding operation. The supporting plates have bearing elements 3, 4 and 5 positioned non-uniformly as between the left and the right supporting plates 2. in such a manner that the bearing element 3 of the left supporting plate is situated in the zone of a first linear guide 7 or guide track while the two opposed bearing elements 4 and 5 associated with this plate are situated in the zone of a second linear guide 7 or guide track. In the case of the supporting plate 2 situated on the right the converse applies, that is the bearing element 3 is situated in the zone of the second guide track 7 while the other two bearing elements 4 and 5 are positioned in the zone of the first guide track 6. The guide tracks 6 and 7 bear on a supporting traverse 8 carried by a cross member 9 as may be seen in Figure 2. The linear guides are preferably constructed as linear ball track guides.

As may also be seen from Figure 1, the supporting plates 2, as viewed from above, have an angular and substantially L-shaped configuration. In the zone of the narrower side there is in each case one bearing element 3, while the two bearing elements 4 and 5 are provided on the wider side. A central receiving zone for the winding arms extends between the two side zones.

On the same side of each of the bearing plates 2 are fork-shaped arms 11 in each case arranged in pairs. In the zone of the arms 11 there is in each case a doubleacting and for preference pneumatically operated ram unit 12 which has a piston 14 movable to and fro inside a cylinder 13 with a rod 15 extending therefrom on both sides, of which the ends are secured in bearing elements 16 positioned on the lower sides of the arms 11. Spaces to the left and right of the piston 14 (outer spaces 17, inner spaces 18) are connected through a piping system 19 with a compressed air source 21. By means of a control valve 22, shown schematically, the inner spaces 18 and 17 of the cylinder 13 affixed to a lockable adjusting block 10, the pistons 14 and thus the rods 15 can be moved to and fro in such a way that the supporting plates 2 and thus the winding arms affixed thereto can thereby be moved into an open or clamped position. This enables finished wound reels to be take out of the winding arms or new winding cores to be inserted into corresponding mountings of the winding arms. The stroke distance is selected according to requirements. The adjusting stroke is determined both by the width of the adjusting block and by the nature of the winding arms.

As shown in detail in Figures 2 and 3, the adjusting block 10 mainly comprises two frame plates 26 situated at a certain distance apart, in the upper zone of which is situated the cylinder 13 belonging to the ram unit 12 and covered by a plate 27, while a braking device 28 is accommodated in the lower zone. This latter device has a supporting structure 29 situated between the frame plates 26 and provided with an operating handle 31. On the opposite side of the structure 29 is a braking surface 32 or a brake lining which interacts with a brake plate 33 affixed to the traverse plate 8. On the opposite side is a further brake surface 34 or a brake lining of a counter-pressure plate 35 screw connected with the adjusting block 10.

The web cutting machine constructed according to this invention operates as follows:

When the braking device 28 has been released the individual supporting plates 2 of the winding stations are manually adjusted on the linear guides 6 and 7 of the supporting traverse 8, according to the required winding width for the webs of material to be wound. This adjustment can be effected using a measuring system not shown or else, for example, by ultra-sound measurement using an appropriate indicator device. In the selected positions the supporting plates 2 are secured on the supporting traverse 9 by means of the adjusting block 10 and the brake device 28. By subjecting the inner spaces 18 of the cylinder 13 of the ram unit 12 to compressed air as required the two supporting plates 2 and thus the winding arms of each winding station are moved apart axially symmetrically so that a new winding core can be inserted into the winding arms. The outer spaces 17 are then subjected to pressure in order to clamp the winding tube. After the completion of the web winding operation the inner spaces 18 of the cylinders 13 are once again subjected to pressure, as a result of which the supporting plates 2 and the winding arms are moved into their open position whereby the finished reel can be extracted.

In the case of narrow winding cores it is sometimes necessary to ensure that clamping rims of the winding arms do not penetrate the winding core too deeply, so that the winding stations, which are closer together in consequence of the shorter opening stroke will not come into contact. In this case the adjusting stroke can be limited by a stop device 25 (Figure 3) insertable between one arm 11 of the supporting plate 2 and one frame plate 26 of the adjusting block 10.

With the L-shaped arrangement of the supporting plates 2, with one supporting element positioned in the zone of one guide track and two supporting elements in that of the other guide track, the theoretical minimum winding width obtainable is calculated as follows: Wmin = HL + 3 x L + HR 2 wherein HL clamping stroke, left, HR clamping stroke, right, L length of a bearing element.

Exampl e:

HL HR L Wmi n mm (the relevant winding arm being driven) 20 mm (the relevant winding arm not being driven) 85 mm.

+ 3 x 85 + 20 150 mm.

2 If for smaller cut widths the principle of this invention is to be used, owing to the advantage which it offers, but the dimensions of the bearing element is to be retained, in order to benefit from the possible combinations of very narrow and wider winding stations, it serves little purpose to seek the solution in a further restriction of the clamping stroke. A more effective method is to reduce the number of bearing elements per guide track from two to three. This object can be very easily achieved by providing a third linear guide on which, as on the other two guide tracks, two bearing elements are guided, in which case the bearing element guided on the third guide track in each case can be provided underneath the adjacent supporting plate. A three-track arrangement of this kind is shown in Figure 4. Between the first and the second guide tracks 6, 7 the third guide track 6' is provided, on which the additional bearing element S' is guided. The bearing element 5' is positioned on the lower side of a laterally projecting crosspiece 36 of the supporting plate 2. This crosspiece 36 in each case extends underneath the adjacent supporting plate or as far as a recess provided in the lower side of the latter. A construction of this kind enables the winding arms to be moved still closer together.

The theoretical minimum winding width obtainable is now as follows:

Wmin ' HL + 2 x L + HR 2 Example:

HL = 18 mm HR = 12 mm L = 8 5 mm.

Wmin 18 + 2 x 85 + 12 100 mm.

2 The supporting plates 2 are preferably so constructed that the winding stations borne by them can be secured by simple means and moved into reproducible positions. The interchangeability serves both for the optional insertion of winding arms with and without a driving motor and for the installation of stations for a different winding principle, for example central winding or central and peripheral winding. For possible maintenance purposes likewise it is desirable to make the winding station rapidly removable and replaceable. The positioning and securing method shown in Figure 5 has a fastening device 20 with spring tongues 37 which are screwed onto the supporting plates 2 and which combine with a groove 38 in the foot 39 of the winding station to ensure that the winding arms 40, indicated in broken lines, will rest at right angles and in exactly the right position in the displacement direction. For positioning transversally to the said direction and for the fastening, the operator's side of the reel cutting machine is fitted with clamp 41 which, in conjunction with a clamping surface 42, engages a groove 42a which is provided on the operator's side in the foot 39 and which likewise has a clamping surface and which can be firmly secured by means of bolts 43. On the side of the machine opposite to the operator's side, furthermore, a strap 44 having a guide groove 48 and attachable by means of screws to the foot 39 is provided together with an angle piece 45 which on the foot of the winding arms serves to effect a displacement as far as a fixed stop light which is not shown in the drawing. The angle piece 45 serves at the same time as a fastening device for a ram unit 46 of which the piston rod, in a manner not shown in the drawing, is connected to the winding arms 40 of each winding station, which are pivotable together but adjustable in relation to one another in the axial direction. Access to bolts for locking purposes is only necessary on the operator's side.

The invention is not limited to the example illustrated, variations being possible within the scope - is - of the claims. In principle, the displacement movement of the supporting plates 2 can naturally be equally well effected by using a positioning motor with a suitable measuring device. The invention is applicable whether the winding stations are immediately adjacent to one another on one side of the reel cutting machine or whether they alternate between opposite sides thereof.

Claims

1. A web winding machine with winding stations for winding up narrow webs of material, the machine having a base supporting winding arms of the winding stations, the said base bei"ng displaceably mounted on a linear guide of a supporting traverse and capable of being locked thereon, wherein the base of each winding station, as seen in plan view, is formed by substantially step-shaped supporting plates which engage one another and of which one plate has in the zone of a first linear guide a narrow side having at least one bearing element and in the zone of a second linear guide a wider side having at least two bearing elements, the other supporting plate being provided in the zone of the first linear guide with a wider side having at least two bearing elements and in the zone of the second linear guide with a narrower side having at least one bearing element, and wherein, for the purpose of limited linear displacement of the supporting plates and of the winding arms associated therewith, a cylinder-piston unit is provided associated with each supporting plate and which is mounted in an adjusting block substantially parallel to the linear guides and lockable by a braking device on the supporting traverse.

2. A web winding machine in accordance with Claim 1, wherein the pairs of supporting plates of a winding station which interact have zones graduated or stepped in opposite directions and in addition to side zones having the bearing elements, a receiving zone preferably of the same width on both supporting plates and carrying the winding arms is provided with an adjusting zone situated on a common side.

3. Web winding machine in accordance with Claim 1 or 2, wherein the cylinder-piston unit mounted on the side of the adjusting zone has a cylinder occupying a fixed position on the adjusting block and a piston displaceable therein by means of a fluid pressure medium, such as air, the piston having rods extending from both sides and which are mounted in holding elements which in the adjusting zone of the supporting plates are affixed to arms of the supporting plate which are arranged fork-wise in relation to each other.

4. Web winding machine in accordance with any one of Claims 1 to 3, wherein the distance between the arms of each supporting plate and/or the holding elements affixed thereto corresponds to the width of the relevant adjusting block and/or of the adjusting stroke required for releasing and clamping winding cores held between the winding arms of each pair of adjacent supporting plates.

5. Web winding machine in accordance with any one of Claims 1 to 4, wherein the adjusting block and the braking device form an integral unit, preferably arranged so that the piston-cylinder unit is situated in an upper zone and the braking device in a lower zone of the adjusting block.

6. Web winding machine in accordance with any one of Claims 1 to 5, wherein the adjusting block is manually displaceable in a direction generally parallel to the linear guides and includes two frame plates situated a distance apart which encloses the cylinder-piston unit between them and which, in the zone of the braking device, extends around a supporting body which is provided on the side opposite to an associated bearing with an operating device and a brake lining interacting with a brake plate.

7. Web winding machine in accordance with any one of Claims 1 to 6, wherein a brake plate is affixed to a traverse plate of the supporting traverse and interacts, on a side opposite to the brake lining of the supporting body, with a counter-pressure plate which is likewise provided with a brake lining and which is affixed to the adjusting block.

8. Web winding machine in accordance with any one of Claims 1 to 7, wherein the adjusting stroke of the supporting plates is additionally limited as an optional measure by a stop device which can be inserted between the adjusting block and one arm of the supporting plate.

9. Web winding machine with winding stations for winding up narrow webs of material, the machine having a base supporting winding arms of the winding stations, the said base being displaceably mounted on a linear guide of a supporting traverse and capable of being locked thereon, wherein the base of each winding station is formed from identically constructed supporting plates each with a laterally projecting crosspiece which extends into the zone of an adjacent supporting plate and on which, in the two end zones of each supporting plate, bearing elements are provided which are displaceable on respective linear guides.

10. Web winding machine in accordance with Claim 9, wherein the lateral crosspiece of each supporting plate can be moved underneath the adjacent supporting plate.

11. Web winding machine in accordance with Claim 9, wherein the lateral crosspiece of each supporting plate may lie in a corresponding recess of the adjacent supporting plate.

12. Web winding machine in accordance with any one of Claims 1 to 11, wherein a securing device for positioning and securing the winding stations on the supporting plates is provided between the said supporting plates and the winding stations carried thereon.

13. Web winding machine in accordance with any one of Claims 1 to 12, wherein the securing device is provided on the upper side of each supporting plate with spring tongues and provided on the foot of the winding station with a groove enabling a transverse displacement to be effected, clamping and securing elements being provided.

14. Web winding machine in accordance with any one of Claims 1 to 13, wherein the clamping elements of a lockable clamp which is subject to spring force and which has clamping surfaces engaging a groove in the foot of a winding station, and the securing elements, are formed by a strap with a guide groove situated level with the supporting plate.

15. Web winding machine constructed and arranged to function as described herein and exemplified with reference to the drawings.

16. A winding arm support structure for a web winding machine constructed and arranged to function as described herein and exemplified with reference to the drawings.