JPH0640650A - Debvice for loading fiber web on holding belt which circulates - Google Patents

Abstract

PURPOSE: To array the edges of fleece band coils to be applied on a support web in sequence by providing a detector which detects the connecting edge of the fleece band in a device for applying the fleece bands forming a plurality of coils lined side by side to a support web. CONSTITUTION: A device for applying a non-woven strip 1 to a circulating support web 2 comprises a fleece band feed device 3 which can be moved in the right-angle direction to the moving direction of the support web piece. The feed device 3 is provided with a device for rewinding a fleece band coil roll 11 and edge trimmers 12 which acts on the non-woven strip 1 rewound and fed to the support web 2. The edge trimmers 12 are operated so as to trim the non-woven strip 1 which receives tensile stress between a belt conveyor 14 and a drawing roller 15. To apply the trimmed non-woven strip 1 at a given pitch angle to the support web 2, the feed device 3 is provided pivotally on a slide base 4. All the movements above are controlled based on the output of a detector 25 of fleece band connecting edge.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a fiber web feeding device having an edge aligning device for a fibrous web area fed to a holding strip, the fiber web feeding device being able to run at right angles to the holding strip, and a fiber to be fed. A device for depositing a longitudinal web of a previously laid fibrous web winding, which forms the contacting edge of the web area, and for placing the woven fibrous web on a circulating retaining strip in side-by-side winding .

[0002]

2. Description of the Prior Art A holding strip for a feeding device for placing a fibrous web in a plurality of side-by-side windings on a circulating holding strip in such a way that the individual windings are exactly juxtaposed with respect to the edge. Transverse feed of the pieces, forming each contact edge,
It is known to make adjustments in accordance with the longitudinal course or the longitudinal edge course of a fibrous web winding already placed on a holding strip. To this end, on the basis of the course of the indicator thread detected by the row camera, in order to derive a manipulated variable for controlling the drive for the lateral feed of the holding strip relative to the stationary feeder in this case, It is known to feed marking yarns parallel to a fibrous web (EP-A-123969). It is known to detect the longitudinal edges of a fibrous web winding which form the contact edges of the incoming fibrous web area, in order to allow only deviations from a given longitudinal course of the fibrous web winding to be taken into account. Yes (Austrian Patent No. 391676), which is based on the assumption that a constant fiber web width can be expected due to the alignment of the fiber web areas fed to the holding strip. Allows precise juxtaposition on edges. In practice, the width variation in the area of the fibrous web area fed to the holding strip,
Therefore, it has also been found that non-uniform juxtaposition of individual fiber web windings occurs many times.

[0003]

SUMMARY OF THE INVENTION The problem underlying the present invention is to improve the device for placing a fibrous web on a circulating holding strip by simple structural means so that it can be placed on the holding strip in sequence. In order to ensure an exact juxtaposition with respect to the edges of the fiber web winding.

[0004]

According to the invention, the object is to deliver fibers to the holding strip between the edge aligning device and the hit point on the holding strip of the fed fiber web area. A device for detecting the position of the connecting edge of the web area is provided, and a device for detecting the longitudinal edge progress of the already loaded fiber web winding is sent to the holding strip as a target value transmitter. The devices for detecting the position of the connection edge of the fiber are connected to the regulator as actual value transmitters, respectively, and this regulator sets the controller for the course of the connection edge of the incoming fiber web area as the target value and the actual value. It is solved by urging the values to match.

By these measures, not only deviations in the extent of the course of the contact edges of the already loaded fibrous web windings but also in the extent of the width of the fibrous web area fed to the holding strip are taken into account. It This is because the course of the contact edge of the previously loaded fibrous web winding forms a setpoint value for the course of the connecting edge of the incoming fiber web section and the course of this connecting edge is controlled by the control device. , Because it can be controlled so as to eliminate the generated difference between the target value and the actual value.

In order to detect the position of the connecting edges of the fibrous web area which is fed to the holding strip, different detectors are sufficient, without the edge contours impairing the fibrous web characteristics or the fibrous web course by these detectors. It can be used if it can be accurately determined. In this connection, a particularly advantageous situation is obtained by means of a device consisting of an optoelectronic receiver which is directed to a turning guide device for the fiber web area. Because the measurement can be carried out contactlessly in a known manner via a photoelectric receiver, preferably a row camera, and the deflection guide for the fiber web area determines the course of this fiber web area relative to the measuring device. Yes, that is especially important with respect to the focusing of the optoelectronic receiver required for sufficient resolution.

As a control device for the course of the connecting edges of the fiber web section fed to the holding strip, any operation capable of achieving a lateral movement of the fed fiber web section relative to the holding strip. The device may be used. For this reason, drive devices for the transverse feed of the feeder are conceivable for this purpose. However, the relatively large mass of the entire feeder causes an increase in expenditure when trying to achieve fine tuning. In this connection, the feeding device is arranged on a slide or vehicle which ensures lateral feed and can be swung about this slide or vehicle about an axis of rotation extending at right angles to the fiber web area or the holding strip. A more favorable situation arises when the mass to be moved can be limited due to the lateral movement of the incoming fibrous web section, as is the case when it is supported on the. The lateral movement of the incoming fibrous web area by means of a constant lateral drive of the slide or vehicle can be superposed on the lateral movement by the rotation of the feeding device, which lateral movement is wound and fed. Since all deviations from the immediate flutes in the area of the fibrous web area are taken into account, the fed fibrous web area is always aligned with the pitch angle at which this fibrous web area is placed on the holding strip. It has the additional advantage of being directed.

Another possibility of controlling the course of the connecting edge of the incoming fiber web area is obtained by controlling and trimming the connecting edge, in which case the edge alignment corresponding to this connecting edge. The blades are aligned at right angles. This control does not require any intervention in the transverse feed of the fibrous web area fed to the holding strip, so that the placement of the fibrous web area with a constant pitch angle can be maintained, which This has the advantage of ensuring a flashing course of the contact edge of the subsequent winding of the fibrous web.

If the external tension on the fibrous web area supplied to the holding strip is changed, then necessarily the width of this fibrous web area also changes. This is because the increase in tension leads to the contraction of the width of the fiber web. This effect can also be used for control of the edge course of the fibrous web area, if the feeding rate of the fibrous web area can be adjusted. The tension on the fiber web area results from the difference between the fiber web feed rate and the fiber web withdrawal rate, which is determined by the peripheral speed of the holding strip. In this case also, in some cases, additional interventions for transverse feed can be omitted.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS The drawing shows an exemplary embodiment of the invention.

The illustrated device for placing the fibrous web 1 on a circulating holding strip 2 comprises a feeding device 3 for the fibrous web 1, which feeds via a slide 4 a turning roller 6. It is possible to run along the rail guide device 5 at right angles to the holding strips 2 which are guided and combined in a tubular shape. A rack 7 parallel to the rail guide 5 is used to drive the slide 4, and this rack engages with a pinion 9 driven by an electric motor 8. The feeding device itself has an unwinding device 10 for the fiber web roll 11 and an edge aligning device 12 for the fiber web zone 1 which is unwound from this fiber web roll 11 and sent to the holding strip 2. ing. The fibrous web section drawn from the fibrous web roll 11 first passes through a free slack section 13 in order to allow the cancellation of the internal stresses due to the winding, and then this fibrous web section reaches the belt conveyor 14, The fiber web 1 between the belt conveyor and the pair of drawing rollers 15
Is subjected to tensile stress and can be trimmed precisely by the edge aligning device 12. The trimmed fibrous web area then maintains a predetermined tensile stress in order to form a plurality of side-by-side windings 2a mounted on the holding strip 2 with a predetermined pitch angle. And is supplied to the holding strip 2 via the turning roller 16.

A fibrous web section 1 drawn from a fibrous web winding body 11 and trimmed on the edge side by an edge aligning device 12 can be accurately placed on a circulating holding strip 2 with a predetermined pitch angle. In order to do so, the fibrous web section 1 is directed through the feeding device 3 in the direction of the pitch angle. For this purpose, the feeding device 3 is supported on the slide 4 by swivel bearings 17 in such a way that it can be swiveled around its axis of rotation, which axis of contact strikes the holding strip 2 with the fiber web zone 1. It extends at right angles to the fibrous web area or holding strip 2 in the region of the point 18, but is spaced from this point 18.

A swivel cylinder 19 is provided for rotating the supply device 3 relative to the slide 4, which is pivotally mounted between the slide 4 and the supply device 3 and receives hydraulic pressure on both sides. be able to. This control of pressurization takes place via a valve 20 in the pressurization conduits, only one of which is shown diagrammatically in FIG. 1 for clarity. Operating drive 2 for these valves 20
1 is controlled by a regulator 22, which is connected to an angle transmitter 23 in order to receive the actual value of the rotational position of the feeding device 3 with respect to the slide 4. In addition, a device 24 for detecting the longitudinal course of the already loaded fibrous web winding 2a, which forms the contacting edge of the fibrous web area fed to the holding strip 2, is fed to the holding strip. The regulator 22 is connected to a device 25 for detecting the position of the connecting edge of the incoming fiber web section. This device 25 for detecting the course of the longitudinal edges of the connecting edge 1a of the incoming fiber web zone 1 with the already wound fiber web winding 2a is preferably a photoelectric receiver 2
6, preferably as a row camera, for example, this row camera having a draw roller 15 and a contact point 1
8 for detecting the connecting edge 1a of the fibrous web section 1 in the area of the turning guide device 16 for the fibrous web, which is necessary for accurate position detection. You can decide. A light source 27 for illuminating the fiber web edge to be detected is preferably provided on the side of the turning guide device 16 opposite the row camera 26. The deflection guide device 16, which should have a width-maintaining effect on the fibrous web, and is thus designed spherically, has a cutout 28 in the region of the fibrous web edge to be detected.
Allows light transmission to a or free peek of the row camera.

In order to ensure an exact juxtaposition with respect to the edges of the individual fiber web windings 2a, the measured values of the device 24 with respect to the position of the contact edges of the fiber web winding 2a with respect to the holding strip width are used as target values, The fiber web winding 2a on which the fiber web area 1 to be sent has already been placed on this target value
In order to ensure that the following is true, the actual values determined by the connecting edge 1a of the incoming fiber web section 1 must be fitted. If the setpoint-actual value difference is detected by the regulator 22, the drive motor 8 can be driven for the lateral feed of the slide, thereby eliminating deviations in the course of the rolling turns which collide. You can

Another possibility of controlling the edge profile is that the output signal of the device 24 for detecting the longitudinal edge profile of the already loaded fiber web winding 2a is a pitch when the fiber web is deposited on the holding strip 2. It consists in energizing the valve 20 so that the target value and the actual value coincide, as in the case of the angular guide amount.

If the aligning device has a laterally adjustable cutting tool 29, which is accompanied by a position adjusting device 30 which can be controlled by the adjuster 22 during the alignment, another control intervention is required. Done. By means of these cutting tools 29, which can be positioned at right angles to the width of the fibrous web, the respective connecting edges of the section of fibrous web which is fed in can be trimmed according to the detected target-actual difference. It can be trimmed differently from the progress.

An electric motor 31 is used to drive the pull-out roller pair 15 of the aligning device 12, which allows a constant tension for the aligning process to be exerted on the fiber web area. The belt conveyor 14 is also driven at a predetermined gear ratio with respect to the pull-out roller 15. Since this electric motor 31 can be actuated by an adjuster, under constant tension conditions the feed rate of the fibrous web section 1 to the holding strip 2 is adjusted in the range of the aligning device so that the target and actual values match. can do. If so, holding strip 2
As the feed rate of the fibrous web section 1 to the generally invariant peripheral speed of the is decreased, the tension in the fibrous web section in the range between the aligning device and the point of impact of the fibrous web section on the holding strip increases, The fiber web width is thereby reduced, which makes it possible to eliminate deviations in the course of the contact edges of the already loaded fiber web winding. The increase in the feeding speed of the fiber web section 1 naturally has the reaction of increasing the width of the fiber web.

The invention is, of course, not overlooked in the illustrated embodiments. The individual means for controlling the edge course of the fibrous web area thus fed to the holding strip can be used alone or in any combination, as the situation requires.

[Brief description of drawings]

FIG. 1 is a schematic cutaway side view of a device for placing a plurality of side-by-side windings on a circulating retaining strip according to the present invention.

FIG. 2 is a cutaway enlarged side view of a preferred device for locating the connecting edge of a fibrous web section fed to a holding strip.

FIG. 3 is a schematic plan view of this position detection device.

FIG. 4 is an IV-I of FIG. 1 of a swing drive for a feeder.
It is an enlarged plan view which follows the V cross section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fiber web 2 Holding strip 2a Fiber web winding 12 Edge aligning device 18 Places per 18 22 Adjuster 24 Device for detecting vertical edge progress of fiber web winding 25 Device for detecting position of connecting edge of fiber web area

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Peter Michelle, Austria Marchtrenk Rennell Schieutlerse 30 (72) Inventor Hannes Poum, Austria Alberndorf Scheuv Mvuek 35

Claims (6)

[Claims] 1. A fibrous web feeding device having an edge aligning device for the fibrous web area fed to the holding strip, which can run at right angles to the holding strip, and a contact edge of the fed fibrous web area. An edge aligning device (12) for forming a side-by-side winding of a fiber web onto a circulating holding strip, the device comprising: ) And the contact point (18) on the holding strip (2) of the fed fibrous web zone (1), a device (25) for detecting the position of the connecting edge of the fed fibrous web zone (1). ) Is provided, and the device for detecting the longitudinal edge progress of the already wound fiber web winding (2a) is sent as a target value transmitter and to the holding strip (2). Device for detecting the position of the connection edge of
5) are respectively connected as actual value transmitters to the regulator (22), which adjusts the control device for the course of the connecting edge of the incoming fiber web zone (1) to the target value and the actual value. Device for placing a fibrous web on a circulating holding strip, characterized in that it is biased so that the values match. 2. A device (25) for detecting the position of the connecting edge of the fibrous web section (1) fed to the holding strip (2),
2. An optoelectronic receiver directed to a turning guide (16) for a fiber web section (1), characterized in that it comprises a photoelectric receiver.
Equipment described in 3. The control device for the course of the connecting edge (1a) of the incoming fiber web section (1) comprises a drive device (8) for the lateral feed of the feeding device (3). Device according to claim 1 or 2, characterized. 4. A control device for the course of the connecting edge (1a) of the incoming fiber web zone (1) is provided perpendicular to the fiber web zone (1) or to the holding strip (2). Device according to one of claims 1 to 3, characterized in that it comprises a device (19) for rotating the supply device (3) about a rotation axis extending at right angles. 5. A control device for the course of the connecting edge (1a) of the incoming fiber web section (1) is provided with an edge aligning device (corresponding to the connecting edge of the incoming fiber web section (1)). 5. Device according to claim 1, characterized in that it comprises a device (30) for laterally adjusting the edge-aligning blade (29) of (12).
The device according to one of the above. 6. A device for controlling the course of the connecting edge (1a) of the incoming fiber web zone (1) for adjusting the feed rate of the fiber web zone (1) to the holding strip (2). (31) It consists of (31), Claim 1 characterized by the above-mentioned.
An apparatus according to any one of 1 to 5.