EP0830472A1

EP0830472A1 - Tenter unit

Info

Publication number: EP0830472A1
Application number: EP96905734A
Authority: EP
Inventors: Steffen Greif; Peter Pfeiffer; Ingo Lison
Original assignee: Kuesters Zittauer Maschinenfabrik GmbH
Current assignee: Kuesters Zittauer Maschinenfabrik GmbH
Priority date: 1995-06-03
Filing date: 1996-03-09
Publication date: 1998-03-25
Anticipated expiration: 2016-03-09
Also published as: US5819382A; JPH10506443A; EP0830472B1; WO1996039554A1; JP2977615B2; DE59602888D1; DE19520513C1

Abstract

The tenter unit (100) for textile fabric webs comprises a first porcupine disk unit (20) with two porcupine disks (26, 28) arranged along a first axis (27) with a distance between them corresponding to the width of the fabric web (4) and a second porcupine disk unit (40) with a second axis (47) parallel to the first axis (27) and situated in the tilting plane, with two porcupine disks (46, 48) perpendicular to axis (47) and revolving around it at the same circumferential speed as the first two porcupine disks (46, 48). The axial distance between the porcupine disks (46, 48) is equal to the axial distance between the first porcupine disks (26, 28) in their expanded separation. The edges of the porcupine disks (26, 46 and 28, 48) nearly touch each other in their expanded separation, and so the fabric web (4) can be transferred from the first porcupine disks (26, 28) to the second porcupine disks (46, 48) without giving up the pinning to at least one of the porcupine disks (26 or 46 and 28 or 48).

Description

Spreader unit

The invention relates to a spreader unit of the type corresponding to the preamble of claim 1.

Needle disks with the material web are to be understood to be wheel-like disks mostly made of metal, which on their circumferential edge are all around with closely spaced needles of the same length pointing radially outwards, which penetrate the edges of the material web and this in the width direction allow tensioning or tensioning.

A generic spreader unit is known from DE-PS 480 155. The web runs on two needle disks which are inclined in the web plane in the area in which they have a smaller axial distance at their needled edge, orbits the needle disks by approximately 240 °, the edges of the needle disks moving axially apart and one Spreading of the material web packed at the edges by the needles takes place and leaves it again in a plane which is offset at an angle of approximately 90 ° to the inlet plane. The angular position and the transverse spacing of the needle disks are adjustable and driven together.

From DE 41 41 779 AI a device for leveling a web is known, which also with works two needle disks which can be changed in their angular position. The purpose of this device is to equalize a web with much less effort than a conventional tenter frame and still produce a treatment effect equivalent to leveling a tenter frame.

A common feature of the known devices with needle disks which can be pivoted relative to one another and arranged on a common axis is that the treated material web is released after leaving the needle disks. When such a device is used in mercerising and similar systems, however, the web has a tendency to shrink again after it has been spread. It jumps in the transverse direction immediately after leaving the needle disks.

The invention has for its object to develop a generic spreader unit so that the spreading achieved is still maintained over a certain distance of the web.

This object is achieved by the invention reproduced in claim 1.

Thus, the first needle disk unit is assigned a second needle disk unit, to which the web passes at the point of its maximum spreading without being released, and on which the web is still pinned on a certain circumferential route in the transverse direction.

A special application of such a spreader unit is a mercerizing system, in which the spreader unit connects to the diffusion line which follows the application of the mercerizing liquor. In this area, the web has a strong tendency to shrink in the transverse and longitudinal directions and is prevented from doing so by the second needle disk unit.

A so-called palmer disc arrangement, in which the material web at its edges via inclined disc ben runs and is held in the transverse direction, so that it has to take part in the increase in distance when the disks circulate, is the subject of DE-PS 610 937. The goods web passes here to an immediately downstream unit in the form of a calender roll on which it is held flat in bound goods management. However, the transition does not take place without relinquishing the bound goods management and not in such a way that the web is then only gripped at the edge and held in the transverse direction.

The degree of spreading in the invention is set by pivoting the two needle disks of the first needle disk assembly.

In order to achieve an automatic adjustment of the distance between the needle disks of the second needle disk assembly to the new width position, the configuration according to claim 2 is recommended, which can be designed in detail in the manner set out in claims 3 to 7.

An advantageous embodiment and arrangement of the swivel drive is the subject of claim 8.

An important feature is the support drum according to claim 9. A material web deflected into a partially cylindrical shape by a needle disk engaging in the edge and under transverse tension has the tendency to constrict radially, i.e. to be concave between the needle disks. This can be counteracted by the support drums, which prevent constriction.

The length of the support drum between the needle disks, that is to say transversely to the web of material, is expediently adjustable in order to be able to adapt to the set position of the needle disks (claim 10), which is particularly due to the construction specified in claim 11 can be realized in which the support drum in the simplest case consists of two interlocking parts, but can also comprise more than two correspondingly configured axially interlocking parts. The preferred arrangement of the two needle disk units is the stacking arrangement according to claim 12. This has a number of advantages. It makes it possible, for example, to mount a control station according to claim 13, which permits the entry of the material web onto the first needle disk unit to be observed. It is also freely possible, according to claim 14, to apply a treatment liquid to the fabric web encircling the needle disk units during and after the spreading process, as a result of which the treatment liquid can be provided in a spread position. For example, when mercerizing on the needle disk units, rinsing of the mercerizing liquor can begin, which has the consequence that the web loses its tendency to shrink before it is released. In this way, the essential first phase of the stabilization of the product web provided with alkali can take place without having to fear loss of width due to the product web being released too early. It goes without saying that the arrangement above one another is also advantageous with regard to a small footprint.

It may be advisable to provide edge spreaders on both edges before the web runs onto the first needle disk unit in order to ensure that the web reaches the needles in a perfect wide position (claim 15).

An embodiment of the spreader unit according to the invention, which is important in practice, is the subject of claim 16. At the transition from the first needle plate unit to the second needle plate unit, only the longitudinal tensile stress in the web is available without special measures, around the edges of the web Needle to run onto the second needle disk unit. Since the needling is carried out at a point where there may still be considerable transverse tensile stresses in the web, the needling onto the second needle disk unit must take place even under difficult conditions. In order to support this process and to make it safer, a uranium needle device is provided according to claim 16, which presses the edges of the web positively radially from the outside into the needles of the second needle disk unit.

In the preferred embodiment of claim 17, such a needling device can comprise a roller provided with circumferential grooves for the needles to pass through, rolling on the edge of the fabric web or the circumference of the respective needle disks, which roll the fabric web next to the needles on the Presses edge of the needle washers.

However, the role is only one possible implementation of such a needle changing device. Circulating brushes, suitably shaped pressure rails or a nozzle system can also be used which directs air or a liquid medium radially from the outside onto the edge of the web in the area of the needles and presses the edge onto the needles.

The respective roller should be mounted on the support member there, which also serves to support the first needle disk unit.

This has the sense that when the width is adjusted, the roller moves automatically and always maintains its correct position relative to the edge of the needle disk.

In order to further secure this position, the roller can have a radially projecting collar with which it is resiliently pressed axially from the outside against the edge of the respective needle disk.

As a result, the roller is always positioned exactly opposite the edge of the needle disk, so that the needles always run cleanly through the circumferential grooves of the roller.

A further embodiment relates to the run-up of the web of material running towards the first needle disk unit from the last guide roller in cases in which the top vertex thereof is approximately at the same height as the upper vertex of the first needle disc unit and in which the web is guided tied up to the last guide roller. Normally, when moving from the last guide roller to the first needle disc unit, a free goods path inevitably arises for geometric reasons, which can be very undesirable.

The embodiment according to claim 20 serves to prevent this free stretch of goods, the effect of which is to hold the bound web guide completely until it comes into contact with the first needle disk unit.

In order for the deflection roller to fit evenly into the gusset between the last guide roller and the first needle plate assembly, a certain flexibility of the bearing of the deflection roller is recommended.

At the outlet of the material web from the second needle disk unit, the most uninterrupted maintenance of the bound material web guide can be important and can be achieved by a needle roller according to claim 22. The needle roller removes the web tangentially from the second needle disk unit and lies under its weight and the web train on the first following roller, whereby it is freely movable in the guide in the vertical direction.

In order to be able to optimize the position of the needle roller with respect to the second needle disk unit, it is advisable to adjust the guide in the horizontal direction, ie against the second needle disk unit or away from it (claim 23).

The spreading of the material web can be automated according to a further embodiment of the spreader unit according to the invention, in that the swivel drives for the first needle disk unit, which experience the transverse tension of the material web, are connected via force transducers, the signals of which can be input to a control device which can be input via Drive mσtor the width adjustment of the second needle disc controls the unit and thus also the first needle disc unit.

According to claim 26, a measuring device for the actual value of the set width of the second needle disk unit can also be provided, the signal of which can be input to the control device.

According to claim 25, a control device can be assigned to the control device, which regulates the width setting of the second needle disk unit in such a way that the transverse tension of the web remains between a minimum and a maximum value, ie in a target range.

The material web must not become slack in the transverse direction if the spreader unit is to make sense. On the other hand, it must also not be stretched in the transverse direction to such an extent that destruction occurs in particular at the edges of the web. The maximum tension endured by a certain web is known from tests. The regulation is thus carried out in such a way that the material web is subjected to a predetermined transverse tensile stress as it passes through the spreader unit and in this way undergoes a constant structural change.

In order to prevent the second needle disk unit from spreading apart to the maximum width in the event of an accidentally tearing or needling of the web edges, the regulation can have the configuration set out in claim 27.

In order to be able to influence the stretching of the web not only in the transverse direction or, in particular, to counteract a longitudinal shrinkage occurring during mercerization, a combination of the spreader unit with a longitudinal stretching field can be expedient (claim 28), which in a spreader unit with needle disc units arranged one above the other Advantage upstream of the spreader unit (claim 29), because it then forms at the same time the necessary transition section to get from the height of the upstream system part to the apex height of the upper needle disk unit. All of the features described are essential to the invention both on their own and in any combination.

Exemplary embodiments of the invention are shown in the drawing.

1 shows a schematic side view of a spreader unit integrated in a continuous treatment plant;

Fig. 2 shows a schematic view according to the arrows II-II in Fig. 1 with the control panel omitted;

3 shows a perspective view of the mutual engagement of the needles of interacting needle disks;

4 shows a side view of the spreader unit;

5 shows a perspective detailed view from the run-up area of the web;

FIG. 6 shows a perspective side view of the spreader unit from the side opposite to FIG. 4;

FIG. 7 shows an enlarged detail from FIG. 1 with a needling device;

FIG. 8 shows the needle device according to FIG. 7 from above;

Fig. 9 shows a longitudinal section through the role of the needling device on an enlarged scale;

FIG. 10 shows a partial view corresponding to FIG. 1 of an embodiment modified at the inlet and outlet of the spreader unit;

FIG. 11 shows a view corresponding to FIG. 2 with automation elements.

The spreader unit, designated 100 as a whole in FIG. 1, is part of a mercerizing system in the exemplary embodiment shown. This comprises an upstream system part in the form of a diffusion compartment 1, through which the material web 4 passes after the mercerizing liquor has been applied. - 9 -

In the diffusion compartment 1, the mercerizing liquor 1 has the opportunity to diffuse completely into the web 4.

All of the rollers and needle disks mentioned have mutually parallel axes running in the width direction of the web 4.

The diffusion compartment 1 is adjoined by a longitudinal stretching field 2, in which the material web 4 is transferred in a bound manner from the height of the diffusion compartment 1, that is to say approximately half a man's height, to a greater height of approximately 2 m. The longitudinal stretching field 2 comprises fixed guide rollers 7, guide rollers 8 and 8 "mounted in tensile force transducers 8 ', pendulum-suspended guide rollers 9 and a driven pull roller 10. Via the drive of the pull roller 10, it is possible to move the web 4 before the spreading process To stretch in the longitudinal direction and to check the longitudinal tension occurring in the web 4 by the upstream roller 8 with the tensile force transducers 8 '. The two guide rollers 8, 8 "do not rest on their neighboring rollers, but can be slightly under the tension of the web 4 Move well to enable the measurement in the tensile force transducers 8 '. The sequence of rolls 8,7,9,7,9,9,10,8 ", which comprises the longitudinal stretching field 2, extends upwards, ie the later rolls of the sequence are always higher with their axes, so that a height difference is overcome can be.

From the upper guide roller 8 "as the last roller in the sequence, the material web 4 runs approximately horizontally from the longitudinal stretching field 2 into the spreader unit 100. This comprises a first, in the exemplary embodiment upper needle plate unit 20 and a second needle plate unit 40 arranged vertically below. The goods ¬ track 4 runs in the area of the upper vertex on the upper needle disk assembly 20, circles it by about 180 °, passes at point 3 to the lower needle disk assembly 40, circles it by about 270 ° and leaves the lower needle disk assembly 40 the point 14, where it is removed from the needles 30 by a guide roller 21 leads and is transferred by means of a further guide roller 23 to the subsequent machine part, in the exemplary embodiment the stabilizing compartment 22 of the mercerizing machine.

Above the essentially horizontal guide line provided by the guide rollers 21, 23 there is an operating station 24 which extends across the width of the material web and on which an operator 25 can follow the proper entry of the material web 4 onto the first, upper needle disc unit 20.

In order to make the process of needling the material web 4 securely at its edges onto the first, upper needle disk unit 20, a mechanical edge spreader 5 is provided on each side immediately before it hits the needle disk unit 20 and is above the two needle disks of the needle disk unit 20 Pressure roller rollers 6 are provided which press the edge of the web into the needles 30 of the needle disk unit 20. The presence of the fabric edge in the area of the edge spreader 5 is determined by an electronic fabric edge detection 12, the proper needling, i.e. the presence of the web edge in the area of the needle disks by means of appropriate sensors 18.

The actual spreading of the goods is carried out by the upper needle disk assembly 20, while the lower needle disk assembly 40 holds the width of the web of material that has been reached during its circulation over the 270 °. In this circulation area, in the exemplary embodiment below the lower needle disk unit 40, there is an application device for treatment liquid in the form of a pair of spray tubes 16 which spray water or highly diluted alkali against the web 4 radially from the outside, in order to stabilize it initiate. Excess treatment liquid is discharged through a trough 17 arranged under the lower needle disk unit 40. The structure of the two needle disk units 20 and 40 is shown in more detail in FIG. 2.

The first needle disk unit 20 in the running direction of the web 4, in the exemplary embodiment upper, comprises two needle disks 26, 28 of approximately 800 mm in diameter which are arranged in the region of the edges 4 'of a web 4 along a first axis 27 and are essentially perpendicular thereto which carry radial needles 30 which are close together on their circumference and protrude approximately 10 to 15 mm radially freely, pierce the edges 4 'of the web 4 and hold them in the axial direction. The needle disks 26, 28 are rotatably supported about axes of rotation 35, 37 on essentially mutually directed shaft journals 32, 34 which are fastened to the respective upper end of essentially upright pivoting members 36, 38 which can be pivoted about a pivot axis 15, which is perpendicular to the plane passing through the axes 27 of the upper needle disk assembly 20 and 47 of the lower needle disk assembly 40 and extends tangentially to the needle disks 26 and 28, respectively. When the respective pivot member 36, 38 is pivoted, the edge of the needle disks 26, 28 always remains in the region of the pivot axis 15 in its lower apex. When the pivot member 36, 38 is pivoted, the axes of rotation 35, 37 also shift Needle disks 26, 28 in the indicated manner out of the aligned position, and the two needle disks 26, 28 are inclined in the manner shown in FIG. 2. The pivoting is effected by a swivel drive 13, which as a linear drive, e.g. is designed as a spindle or piston / cylinder unit and engages at one end at a point of application 31 on the outside of the swivel members 36, 38 in the region of the axes 35, 37.

The pivot axis 15 is formed by a bearing on a pair of substantially upright support members 56, 58 to be assigned to the lower needle disk assembly 40. The support members 56, 58 are approximately T-shaped in the view of FIG. 2 and have one to the axis 47 of the lower needle disk unit 40 have approximately parallel crossbeams 56 'and 58', on the mutually facing inner free ends of the bearing points with the pivot axes 15 and on the outer free ends of the other point of engagement 31 'for the respective pivot drive 13 is. The swivel drive 13 is therefore arranged outside the swivel member 36 or 38 and is capable of pivoting it in the direction of the arrow, as a result of which the inclined position of the needle disks 26, 28 can be changed. The webs 56 ", 58" of the support members 56, 58 are each welded to the bottom with a hub 42, 44, which is arranged on a shaft 41 with the axis 47. The shaft 41 is supported in bearing blocks 43 in the machine frame.

On the inside of the hubs 42, 44, the needle disks 46, 48 of the second needle disk assembly 40 are rotatably mounted on the shaft 41, which in the exemplary embodiment have a diameter of approximately 1000 mm. They are positioned in the axial direction so that their outer edge with the needles 30 is located in the same transverse plane of the axis 47 as the pivot axis 15. In the region of the pivot axis 15, the circumferences of the needle disks 26 and 46 and / or 28 and 48 directly with a small distance 55 (FIG. 3) which only slightly exceeds the needle length. This situation does not change if the needle disks 26, 28 are changed in their inclined position.

The hubs 42, 44 and with them the needle disks 46, 48 can be displaced along the shaft 41 in the direction of the arrows 77 in order to be able to bring about an adjustment of the axial position of the needle disks 46, 48 to the width of the web. In the event of such a displacement, the support members 56, 58 and 36, 38 go along and move together with them. Even when the needle disks 46, 48 are displaced, the mutual position of the needle disks 26 and 46 or 28 and 48 in the region of the pivot axes 15 is retained.

The pivot member 36 and the support member 56 on the one hand and the swivel member 38 and the support member 58, on the other hand, each form a closed assembly, which represents an axially adjustable support 50, which carries both needle disks on one side and these when adjusted while maintaining their same axial position or their immediate position Counterpart in the area of the swivel axis.

If the material web 4 runs onto the needle disk unit 20 at the top and circles it downward by 180 ° as shown in FIG. 2, it is stretched in the width direction because the needles 30 gripping the material web 4 at the edges 4 'move away from one another in the axial direction. A flexible sheetlike structure such as a textile web has the tendency to constrict under such a transverse pull with a partially cylindrical course, so that the "diameter" in the middle becomes smaller than at the edge. In order to prevent this phenomenon, both needle disk assemblies 20, 40 between the needle disks 26, 28 and 46, 48 comprise support drums 29 and 49, which rotate with the needle disks. In the exemplary embodiment, the support drums 29, 49 each consist of two identical cylindrical halves 29 ', 29 "and 49', 49", the diameter of which is the same as the diameter of the respectively assigned needle disks 26, 28 and 46.48. The halves 29 ', 29 "and 49', 49" are arranged coaxially on the axes 27 and 47, respectively, and rotate with the needle disks. On the sides facing each other, the halves 29 ', 29 "are divided into axially parallel, narrow, finger-like segments 51 which are uniformly distributed over the circumference and which are divided between axially parallel recesses 52 of a width slightly exceeding the width of the segments 51, so that the mutually facing ends of the segments 29 ', 29 "in the manner shown in FIG. 2 can be pushed axially into one another and also be axially displaced relative to one another without the support of the web in the central region thereby suffering significantly. The halves 29 ′, 29 ″ or 49 ′, 49 ″ are axially displaced when the supports 50 are displaced in the direction of the arrow. taken so that the length of the space between the needle disks 26,28 and 46,48 in the axial direction almost filling support drums 29,49 automatically adjusts.

3 shows the engagement area of the needle disks assigned to one another in detail using the example of needle disks 26, 46. The needle disks 26, 46 have axially projecting collars 53, 54 of rectangular cross section, which form the peripheral edges 26 'and 46' of the needle disks 26 and 46, respectively. In a circumferential groove 68 of the circumferential edge 46 'there is arranged a needle strip 39 with the needles 30 which fills it. The same applies to the peripheral surface 26 '. The needles 30 are each provided in two mutually adjacent planes perpendicular to the axis of the respective needle disk 26, 46. At the narrowest point, the circumferential surfaces 26 ', 46' leave the already mentioned distance 55 from one another. Since the needles 30 are also slightly offset from one another in the axial direction, the needle regions on both sides can penetrate one another without the needles 30 touching one another or touching the opposite collar 53 or 54. 3 shows the situation without a web. When the material web is in the device, it passes at the narrowest point at a distance 55 from the upper needle disk 26 to the lower needle disk 46. This point is therefore the transition point 3 in FIG. 1. In the area of point 3, the web is gripped both by the needles 30 of the upper needle disk 26 and by the needles 30 of the lower needle disk. The needles 30 of the upper needle disk 26 then lift out of the material web during further circulation, which at that moment is already needled on the needles 30 of the lower needle disk 46. The transition to the needle disk 46 thus takes place without any intermediate release or loosening of the detection of the web at its edge.

The needle disks 26, 46 and 28, 48 are coupled by the web in the circumferential direction and therefore run from even with the same peripheral speed corresponding to the web speed. It is not necessary to drive the needle disks 26, 46, 28, 48 because they, like the support drums 29, 49, are taken along by the web 4.

4 shows a side view of the spreader unit 100 in a specific embodiment. A handwheel 57 can be rotated on the axis 47, by means of which the carrier 50 is adjusted along the shaft 41 in the direction of the arrow. Instead of manual adjustment, a motorized adjustment drive can also be provided. The support member 56 has a cross member 59 at the upper end, on which a frame-fixed guide 60 engages, which prevents the carrier 50 from tipping over the shaft 41. The pivot member 38 also has a cross member 61 at the lower end, which runs parallel above the cross member 59 and is pivotable thereon about the pivot axis 15. A cross member 62 is also arranged at the upper end of the swivel member 36, on which on the one hand the edge spreader 5 and the pressure roller 6 and the sensor 12 are attached, as can be seen in detail in FIG. 5.

6 shows a perspective view from the side opposite FIG. 4. The reference numbers are the same. It can be seen that the lower cross member 61 of the pivot member 38 has downwardly extending bearing flanges 63 which are pivotable on the pivot axis 15 extending in the region of the cross member 59 of the support member 58.

FIGS. 7 to 9 show a needling unit designated as a whole with 90, one of which is assigned to each edge of the web. Only the needling device 90 assigned to the front and left edge of the web according to FIG. 1 is described. It is arranged on a carrier 91 which is fixedly connected to the support member 56 and thus moves along in the transverse direction of the fabric direction.

On the carrier 91 is one to the axis of the needle disk 46 parallel pivot axis 92 is provided, on which an angled lever 93 is pivotably mounted, the downward-pointing leg 93 'of which is loaded clockwise according to FIG. 7 by a spring 94 which can be adjusted by means of a screw 95.

The pivot axis 92 is arranged in the circumferential direction of the needle disk 46 at a distance outside the central plane M connecting the axes of the needle disks 26, 46, just above the needle disk 46. The second leg 93 "of the angle lever 93 points against the gap between the needle disks 26, 46 and carries at the free end a roller 96 which can be freely rotated about an axis parallel to the axis of the needle disk 46 or the needle disk assembly 40 and on the ^* edge 46 'of the needle disk 46 rolls, the roller 96 being pressed onto the edge 46' by the action of the spring 94. In the edge 46 'are the needle strips 39 with the radially projecting planes and in two planes perpendicular to the axis of the needle disk 46 arranged needles 30. The roller 96 is substantially cylindrical in the region of the width of the edge 46 'and has two circumferential grooves 97 at the location of the needles 30, which can completely accommodate the needles 30 in the manner shown in FIG Due to the action of the spring 94, the roller 96 is pressed onto the edge 46 ', the edge 4' of the web 4 in between being pressed onto the needles 30 and thus securely needled The roller 96 has a relatively small diameter of approximately 60 mm in its cylindrical part and has moved as close as possible to the gap between the needle disks 24, 26 in the circumferential direction so that the distance between the needles and the transition point 3 is as complete as possible is low.

At its axially outer end, the roller 96 has a circumferential collar 98 with a side surface 98 'perpendicular to the axis of the roller 96. The roller 96 is axially displaceable on its shaft 99 and is surrounded by a helical compression spring 70 surrounding the shaft with the side surface 98 ' of the federal government 98 against the outer end face 46 "of the edge 46 'of the needle plate 46, whereby the correct mutual position of the needles 30 and the circumferential grooves 97 is ensured.

FIG. 10 shows a deflecting roller 72 which is arranged in the region of the entry of the web 4 onto the first needle disk unit and serves to avoid the free path of the web 4 visible in FIG. 1 and indicated by 4 "in FIG. 10 Up to the upper vertex of the last guide roller 8 ", the web runs in a bound or essentially bound guide. In order to avoid the free path 4 ", a deflecting roller 72 is pivotally mounted on links 73 about an axis 74 arranged in the area of the upper half of the last guide roller 8" and can be broken out of a line by means of a linear drive 75 which acts on the links 73 reproduced position above the line 4 "can be pivoted into a position shown in solid lines, in which the lower part of the deflection roller 72 is wrapped by the web 4 and the deflection roller 72 both on the last guide roller 8" and on the first needle disk unit 20 or its support drum 29 (between the needles 30). In this way, the bound goods guidance is also ensured on the route between the last guide roller 8 "and the first needle disk unit 20.

The bearing of the deflecting roller 72 at the end of the link 73 is designed to be somewhat resilient so that the deflecting roller 72 can find its correct position in uniform contact with the guide roller 8 "and the support drum 29 itself. This is due to the fork-like design of the end of the Handlebar 73 in Fig. 10 may be indicated schematically.

In the exemplary embodiment shown, the deflection roller 72 and the last guide roller 8 ″ have approximately the same diameter, while the support drum 29 has approximately the triple diameter.

To ensure that the second needle To ensure that the disk unit 40 at the needle point 14, on the web of material 4 runs approximately vertically upwards, a special needle roller 78 is provided according to the example at the bottom right in FIG. 10, which can move freely in a vertical guide 65 is stored. After it has released itself from the needles of the second needle disk assembly 40, the web of material 4 loops around the upper half of the needle roller 78 and passes from it, which is in contact with the follower roller 79 from above, to the follower roller 79 in bound guidance. The needle roller 78 is freely movable in the guide 65 in the direction of the arrows 66 and seeks its position in the vertical direction under its own weight and the longitudinal tensile stress in the web itself. By the position of the needle roller 78 when it is in contact with the follower roller 79 In order to optimize the needles of the second needle disk unit 40 with regard to the needling process, the guide 65 can be adjusted horizontally in the direction of the arrow 67. However, this adjustment is self-locking, ie the needle roller 78 cannot shift itself in the horizontal direction.

In the exemplary embodiment shown, the needle point 14 lies somewhat above the axis of the second needle disk unit 40. The needle roller 78 has a diameter which essentially corresponds to the diameter of the rollers 8 "and 72. The needle roller 78 is moved by a suitable displacement the guide 65 is positioned in the direction of the arrow 67 in such a way that it just barely touches the needles of the second needle disk unit 40.

A possibility of automating the operation of the spreader unit 100 is indicated in FIG. 11. A control and regulating device 80 is provided. The swivel drives 13 of the first needle disk unit experience the transverse tension of the material web. They act on the respective legs 56 ', 58' of the support members 56, 58 via force measuring members 81, the signals of which are fed to the control and regulating device 80 via lines 82. The width adjustment of the second needle plate assembly 40 and thus also of the first needle plate assembly 20 is carried out by a motor 85, which is controlled by the control and regulating device via a line 86. To detect the actual value of the width setting of the second needle disk unit 40, a measuring device 83 can be provided, the signal of which can also be fed to the control and regulating device 80 via a line 84.

The regulation can take place in such a way that the transverse tensile stress is set to a certain value, which lies between a minimum value and a maximum value, which is determined by the tensile strength of the web in the transverse direction and previously determined experimentally. A web of goods treated in this way has therefore always experienced the same transverse tensile stress and the associated structural change.

However, it is also possible to carry out the regulation in such a way that a certain width of the web to be achieved is specified. This width is maintained regardless of the voltage required for this. If, however, the minimum value or in particular the maximum value of the transverse tensile stress is exceeded, a corresponding signal is given or the unit is switched off.

Claims

Patent claims

1. spreader unit for textile webs with a first needle disc unit (20) with two needle discs (26,28) arranged along a first axis (27) at a distance corresponding to the width of the web (4) with radially distributed over the circumference external needles (30) for insertion into the edges (4 ') of the web (4), with a device (13, 50) for pivoting the axes of rotation (35, 37) of the needle disks (26, 28) in a through the Axial swiveling plane and with a device for needling the material web (4) with its edges onto the needles (30) of the needle disks (26, 28) in the region of the smaller axial distance of the edges of the needle disks (26, 28) , characterized in that the first needle disk unit (20) is assigned a second needle disk unit (40) with a second axis (47) parallel to the first axis (27) and located in the pivoting plane, about the two to the axis (47 ) lower or needle disks (46, 48) rotate at the same circumferential speed as the first needle disks (26, 28) so that the axial distance of the needle disks (46, 48) equals the axial distance of the first needle disks (26, 28) in a region of their increased distance and that the edges of the needle disks (26, 46 or 28,48) almost touch each other in the area of increased distance, so that a transition of the material web (4) from the first needle disks (26,28) to the second needle disks (46,48) without the needling on at least one of the needle disks ( 26 or 46 or 28 or 48) can be effected.

2. spreader unit according to claim 1, characterized in that the needle disks (26, 46 and 28, 48) of the two needle disk units (20 and 40) located on one edge (4 ') of the web (4) together against the the other edge (4 ') located needle disks (28,48 or 26,46) in the width direction of the web (4) are adjustable.

3. spreader unit according to claim 2, characterized ge indicates that the needle disks (26, 46 and 28, 48) of the two needle disk units (20 and 40) located on each edge (4 ') of the web (4). have a common support (50) mounted on the second axis (47) and the opposing supports (50, 50) on the second axis (47) are mutually adjustable.

4. spreader unit according to claim 3, characterized in that each carrier (50) to the second axis (47) angled support member (56,58) and a second support member (36,38) for the axes of rotation (35,37) of the needle ¬ disks (26,28) of the first needle disk unit (20), which on the first support member (56,58) by means of a pivot drive (13) is pivotable about a pivot axis (15) which is perpendicular to the axis (47) The plane is perpendicular to the connecting plane of the axes (27, 47) and tangential to the needle washers (26 and 46 or 28 and 48).

5. spreader unit according to claim 4, characterized characterized in that the first support member (56, 58) is angled and fastened with the foot of the leg (56 ", 58") radial to the second axis (47) to a hub (42, 44) mounted on the second axis (47) is, while the axially parallel other leg (56 ', 58') carries the pivot axis (15) at its free end.

6. spreader unit according to claim 5, characterized in that the first support member (56,58), seen perpendicular to the connecting plane of the axes (27,47), T-shaped and the web (56 ", 58") of "T" is one leg, while the transverse bar (56 ', 58'), which is parallel to the axis, has the pivot axis (15) at the inner free end and the one point of attack (31 ') at the outer free end Swivel drive (13) carries.

7. spreader unit according to one of claims 4 to 6, characterized in that the second support member is at one end on the first support member (56,58) about the pivot axis (15) pivotally mounted pivot member (36,38), at the other end the axis of rotation (35,37) for each of the first needle disks (26,28) is attached.

8. spreader unit according to one of claims 4 to 7, characterized in that the swivel drive (13) is a linear drive which, seen in the axial direction of the first needle disk unit (20), is arranged axially outside of the swivel member (36, 38) and on which attacks another point (31) near the free end of the pivot member (36,38).

9. spreader unit according to one of claims 1 to 8, characterized in that between the Nadel¬ discs (26,28; 46,48) of at least one needle disc unit (20,40) a the space in the axial direction almost filling the same diameter like the related ones Needle disks (26,28 or 46,48) supporting drum (29,49) for the web (4) is provided.

10. spreader unit according to claim 9, characterized in that the support drum (29,49) is adjustable in length.

11. spreader unit according to claim 10, characterized in that the support drum (29,49) consists of at least two coaxial cylindrical parts of the same diameter, the circumference of which is formed on the mutually facing sides by freely projecting finger-like segments (51) , which leave spacing spaces (52) between them in the circumferential direction of the segment width, that the segments (51) of one part engage in the spacing spaces of the other part, and that means are provided for the parts (29 ', 29 "or 49 ', 49 ") to move axially against each other.

12. spreader unit according to one of claims 1 to 11, characterized in that the first Nadelschei¬ benaggregat (20) above the second needle plate unit (40) is arranged and the web (4) is guided such that it is approximately horizontal in the region of the upper Parting line runs onto the first needle disc unit (20).

13. spreader unit according to claim 12, characterized in that above the from the second needle disk unit (40) continuous web (4) on the web inlet on the first needle disk unit (20) opposite a side across the goods web (4th ) extending control station (24) is provided.

14. spreader unit according to one of claims 1 to 13, characterized in that in de from the goods (4) wrapped areas of the needle disk gregate (40) an application arrangement (16) for applying a treatment liquid to the web (4) is provided.

15. spreader unit according to one of claims 1 to 14, characterized in that shortly before the emergence of the web (4) on the first needle plate unit (20) on both edges of the web (4) edge spreaders (5) are provided.

16. spreader unit according to one of claims 1 to 15, characterized in that on each edge of the web (4) in the running direction of the web (4) after the transition point (3) from the first needle plate unit (20) to the second needle plate unit (40) a Umna¬ deleinrichtung (90) is provided, by means of which the penetration of the needles (30) of the second needle disk unit (40) into the edge (4 ') of the web (4) promoting radially from the outside pressure on the edge (4 ') of the web (4) can be exercised.

17. spreader unit according to claim 16, characterized in that the needling device (90) on each edge (4 ') of the web (4) a resilient from the outside to the edge (4') of the web (4) or the peripheral edge (46 ') of the respective needle disk (46) of the second needle disk unit (40) pressed roller (96), which is rotatable about an axis parallel to the axis of the second needle disk unit (40) and circumferential grooves (97) to let the Has needles (30).

18. spreader unit according to claim 17, characterized in that the roller (96) on the respective support member (56 or 58) is mounted.

19. spreader unit according to claim 17 or 18, characterized in that the roller (96) a radial projecting collar (98) with which it is resiliently pressed axially from the outside against the end face (46 ") of the peripheral edge (46 ') of the respective needle plate (46).

20. spreader unit according to one of claims 12 to 19, characterized in that the last guide roller (8 ") before emergence of the web (4) on the first needle plate unit (20), whose upper apex approximately at the same height as the upper apex of the first needle disk unit (20), a deflection roller (72), whose diameter is larger, is arranged on links (73) pivotable about links (24) about an axis (24) approximately at the level of the upper half of the guide roller (8 ") than the clear distance between the guide roller (8 ") and the first needle disk unit (20) and that from a position above the web running from the apex of the guide roller (8") to the apex of the first needle disk unit (20) 4 ") can be pivoted down into a position in which it rests both on the guide roller (8") and on the support drum (29) of the first needle disk unit (20) between its needles (30) and in its lower region from the goods web (4) is partially wrapped.

21. Wide stretching unit according to claim 20, characterized in that the axis of the deflecting roller (72) on the links (73) is slightly displaceable.

22. spreader unit according to one of claims 12 to 21, characterized in that a needle roller (78) is provided at the outlet (77) of the web (4) of the second needle disk unit (40), the diameter of which is greater than the clear distance from it second needle disk unit (40) to the first follower roller (79) and which is freely movable on a vertical guide (65) such that it rests on the follower roller (79) and the needles (30) of the second needle disk unit (40) just not touched anymore.

23. spreader unit according to claim 22, characterized in that the guide (65) in the horizontal direction (67) is adjustable.

24. spreader unit according to one of claims 4 to 23, characterized in that the pivot drives (13) via force transducers (81) are connected, the signals of a control and regulating device (80) can be input, the width via a drive motor (85) ¬ position of the second needle disk unit (40) controls.

25. spreader unit according to claim 24, characterized in that a measuring device (83) is provided for the actual value of the set width of the second needle disc unit (40), the signal of the control and regulating device (80) can be input.

26. spreader unit according to claim 24 or 25, characterized in that the control and regulating device (80) regulates the width adjustment of the second needle disc unit (40) so that the transverse tension in the web (4) is between a minimum and a maximum value remains.

27. spreader unit according to one of claims 24 to 26, characterized in that in the event of a sudden drop in the transverse tensile stress in the web (4) when tearing or needling the web edges (4 ') an uncontrolled spreading of the second needle disk unit (40) is prevented.

28. spreader unit according to one of claims 1 to 27, characterized by its combination with a longitudinal stretching field.

29. spreader unit according to claim 28, characterized in that the longitudinal stretching field (2) is connected upstream of the spreader unit (100).