DE102012112190B3 - Fixing machine for fixing superimposed textile layers e.g. collars, in confectionary industry, has positioning device pivoting deflection element and coupled with controller that deactivates positioning device during middle running of tapes - Google Patents

Abstract

The machine (1) has circulating, endless tapes (3, 4), and alignment devices (11, 12) for automatic resetting of the tapes during off-center tape operation. The alignment devices comprise a deflection element extending transverse to a tape running direction (B). The deflection element is designed as a rotatably supported rocker joist formed as a part of a joist. A positioning device pivots the deflection element and coupled with a controller that deactivates the positioning device during middle running of the tapes such that the deflection element is freely tilted.

Description

The invention relates to a fixing machine for fixing superposed textile layers, with endless belts and rollers for supporting and driving the belts and at least one alignment device for automatically returning the associated belt in the case of off-center belt travel, wherein the alignment device extends transversely to the belt running direction, from the belt having contacted deflecting element.

Fusing machines are used in the clothing industry to reinforce textiles by gluing or laminating superimposed textile layers together, which is the case for collars or cuffs, for example. Usually there is a conveyor belt and an overlying so-called masking tape, which run tightly in a press nip one above the other. Thus, the two bands hold the multilayer package of outer fabric, adhesive and liner in position. A heating device, which heats the two belts, heats the textile layers so that they are glued together in the press nip under pressure and heat.

The belts are mounted laterally without stop and forced guidance on the rollers, so that they can deviate from a central tape run and it can come to an off-center tape run. In order to reorient the tape, an alignment device is provided which comprises a movably mounted roll or beam extending transversely to the direction of tape travel. By unilaterally increasing the belt tension of the tape is corrected. The roller or the beam are pivoted about an adjusting device, such as a spindle motor or a lifting cylinder and thus skewed to bring the tape back to the central position.

From the WO 2006/102946 A1 It is known to pivotally support the roller of the alignment at one axial end and to move at the opposite end on the adjusting device transversely to the axial direction of the roller. The control is usually carried out so that for rapid achievement of the center position, the roller is pivoted beyond the center position in the opposite direction, so that the belt passes quickly into the center position. The role is then left in the respective tilted position, when the sensor is again detected the center position of the tape. In this context, it is of course necessary that a certain Nachsteuerbewegung takes place, because the band is usually first about the center position addition to the opposite side, based on the center position, migrate, and then back to the center position to arrive.

Another design, which has also prevailed in practice, provides at the opposite ends of the role each have their own adjusting device, so that further adjustment options are connected.

From the WO 92/06908 A1 For a belt conveyor, a mechanically operating rocker is provided for the middle position of the belt. Lateral guide rollers are coupled with a lifting mimic for the rocker, so that the rocker is tilted when one hits the edge of the belt on one of the rollers via the lifting mimic. The bearing of the rocker is off-center.

A belt conveyor with a rocker beam, which is adjusted by a piston-cylinder unit, shows the WO 2009/142570 A1 ,

The DE 1 574 298 A describes a device for the position adjustment of an endless belt, in which an edge sensor is used.

The object of the invention is to provide a fixing machine which has a low cost for the alignment and allows a quick alignment.

This is achieved in a fixing machine of the type mentioned by a transversely to the strip running direction extending, contacted by the belt deflection element, which is designed as a pivotally mounted part of a rocker, wherein the rocker extends transversely to the strip running direction and the rocker bearing is arranged centrally to the bandwidth , wherein an adjusting device for pivoting the deflecting element is present. The control device coupled with the control device is programmed so that the adjusting device deactivated in belt center run and the deflecting element is tilted freely. This means that in general the centering device is deactivated, whereby the rocker can tilt freely and the belt can settle.

The fixing device according to the invention supports the deflection element in the middle, that is to say in the middle third of the web, in particular substantially exactly in the middle of the web, via the rocker bearing so that only one adjustment device is present and this adjustment device also requires very small adjustment strokes compared to the prior art. Due to the small strokes the tape feedback is also very fast. The deflecting element extending transversely to the strip running direction is preferably contacted by the strip over the entire strip width and can be designed as a deflection bar or deflection strip or else as a deflection roller.

In addition, an adjusting device should be present only on a rocker arm, in particular at one end of the rocker beam, so that the number of adjusting devices required and the size of the adjusting device and thus the costs associated with it are reduced.

The actuator may be a piston-cylinder unit, in the form of a pull / push cylinder, to allow for quick response. Alternatively, of course, a spindle motor or other linear motor could be used.

The adjusting device is coupled according to the preferred embodiment with a controller which is programmed so that in eccentric tape, the adjusting device brings the tape in a predefined center position and the adjusting device is then depressurized or de-energized when reaching the mid-belt position. The actuator thus gives the band a pulse and returns the band to the center position. While in the prior art, a slight overdriving took place and then was put back again, that is, that a number of control pulses were necessary, the actuator is depressurized or de-energized when reaching the center position, so that the rocker is tilted freely. The rocker and the belt oscillate surprisingly quickly and without intervention of the adjusting device. Thus, few control pulses are necessary. Moreover, this also makes it possible to return the belt to the center position at a relatively high lateral speed. High lateral velocities of the tape always resulted in overdriving in the prior art, so that the tape migrated beyond the center position in the opposite direction, and then back again until approaching asymptotically to the center position. This high control effort is avoided by the invention.

For the endless belts and a belt tensioner is required. The invention provides that the alignment device itself is designed as a belt tensioning device and the rocker bearing is biased against the belt. As a result, a band tensioning device can be saved.

The band tensioning device comprises at least one spring element.

The preferred embodiment of the invention even envisages that the alignment device is the only belt tensioning device for the associated endless belt. This means that either a band or both bands provided in the fixing machine according to the invention are designed with their own alignment device, which at the same time also forms the band tensioning device or forms the single band tensioning device.

The invention also provides a fixing machine according to the preamble of claim 1, characterized by a sensor unit for web edge detection, arranged with a arranged at the tape edge, non-contact sensor head, an electronic transducer that is positioned away from the sensor head and away from the tape, and a signal transmission conductor coupling the sensor head and the signal converter. This variant can be used without or with the aforementioned rocker. The problem with the tape edge sensor devices in the prior art was that the tapes are strongly heated and thus the sensor, and especially the electronics installed in the sensor was subjected to high temperature stress. To avoid this, in the fixing device according to the invention sensor head and electronics are clearly removed from each other and are coupled together via a signal transmission conductor. This allows the electronics to be located away from the belt.

The sensor head works, for example, with LEDs (transmitters) and phototransistors (receivers). An alternative is a solution with ultrasonic sensors, which is less susceptible to dirt than an optical solution.

Depending on the design of the sensor unit, a cable, a light guide or a tube for transmission is then used as signal transmission conductor, for example.

The signal transmission conductor should have a length of at least 50 mm, so that sensor head and electronics have at least a distance of 50 mm. Electronics and sensor head can sit on a board body, which has the advantage that sensor head and electronics are mounted on the same part.

Of course, several sensor heads can be arranged side by side.

In fixing machines is provided in the prior art for each band on the so-called inlet side in which enter the textile layers, and on the outlet side in each case a deflection roller. The outlet side pulleys are the drive rollers for the two bands. A common drive drives a chain, which then drives both pulleys synchronized to each other on the outlet side. In the region of the outlet side, the deflection rollers represent the narrowest gap between the belts or define this narrowest gap. A disadvantage of this construction is that changing chain tension changes the contact pressure and the belt tension. As a result, the bonding of the textile webs also depends indirectly on the belt and chain tension.

Another object of the invention is to avoid these disadvantages described above.

This is achieved in a fixing machine according to the invention or, more generally, in a fixing machine according to the preamble of claim 1, characterized in that the inlet-side guide rollers are designed as drive rollers and thus driven. Since the chain tension depends among other things on the temperature and the temperature on the output side is higher than on the input side, the temperature influence can be reduced by driving the input-side deflection rollers. In addition, none of the pulleys on the input side are responsible for the press nip so that variations in drive chain tension and / or belt tension are not significant. This idea can be used with the above-mentioned ideas of the alignment device with rocker and / or remote from the signal transducer sensor head or regardless of these ideas in a fuser.

The two inlet-side deflection rollers of the two belts are preferably coupled to one another in terms of drive by means of a pulling strand, in particular a toothed belt.

Further features and advantages of the invention will become apparent from the following description and from the following drawings, to which reference is made. In the drawings show:

1 a schematic sectional view through a fixing machine according to the invention,

2 a cross-sectional view along the line II-II in 1 .

3 a simplified representation of the cover strip and its course according to 1 , and

4 a stylized view in the direction of a tape with adjacent sensor unit.

In 1 is a fuser 1 shown in the superimposed textile layers 2 be bonded together over the entire surface, by gluing or laminating under the action of heat and pressure. The superimposed textile layers 2 are in 1 shown stylized.

The fuser 1 includes two circumferential, endless bands 3 . 4 of which the band 3 the lower band is what is called a conveyor belt. The upper band arranged above it 4 is also referred to as masking tape. The ribbon 3 comprises a front in the strip running direction pulley 5 , which also serves as an inlet-side deflection roller 5 is referred to, as well as one at the opposite end of the fixing 1 existing outlet side pulley 6 ,

Accordingly, the band has 4 an inlet side pulley 7 and an outlet side pulley 8th , which adjacent to the pulley 6 is arranged.

The ribbon 4 is shorter than the band 3 and accordingly, the inlet side pulley 7 in the direction of the pulley 5 arranged so that one is not off the line 4 Covered section of the band 3 for the circulation and supply of textile layers 2 arises.

The distance between the ribbons 3 . 4 forms a gap, which in the region of the deflection roller 7 is still relatively large, but then goes to zero, so that the two bands 3 . 4 press against each other and the textile layers 2 be pressed against each other.

heating elements 10 For example, in the form of heated strips, contact the tapes 3 . 4 each on the inside and heat the bands, so that the textile layers 2 glued and laminated together under pressure and heat.

The preferably provided with an elastic jacket pulleys 6 . 8th then make the place with the highest on textile floors 2 applied pressure.

The press nip 9 which is between the two only through the bands 3 . 4 spaced apart rollers 6 . 8th is therefore closest at this point.

It should be emphasized in this context that all roles that are mentioned previously and subsequently, preferably cylindrical and extend at least over the entire bandwidth continuously, so that the band 3 . 4 also rests on the respective role over its entire width.

Moreover, all the rollers are also preferably cylindrical on their outer surface, that is not spherical or the like. This allows the bands 3 . 4 but deviate outwardly from their ideal center position laterally in operation. A lateral stop or forced guidance for the bands 3 . 4 is not intended, because a stop would be the edges of the tapes 3 . 4 destroy over time.

To reset the bands 3 . 4 in off-center tape is an alignment 11 . 12 for every band 3 . 4 provided, which then acts when via sensor units 13 . 14 an off-center tape is detected.

In 2 is one of the alignment devices 12 simplified, wherein the second alignment device 11 may be identical or even something may differ from it.

The alignment device 12 comprises a transversely to the direction of tape B, which simplifies the transport direction for the textile layers 2 should be, extending deflector 15 , This deflecting element 15 runs across the entire bandwidth and is also wider than the band 4 itself, so that even with off-center tape is guaranteed that the tape 4 over its entire width the deflecting element 15 contacted.

In the embodiment shown, the deflecting element 15 a beam or a strip whose surface is very smooth, possibly coated, so that the tape 4 on the deflecting element 15 along slides.

The deflecting element 15 is part of a rocker and pivotally mounted as a rocker beam, wherein the rocker extends transversely to the direction of tape B. The rocker bearing 16 is centered, that is in the middle third of the bandwidth or the deflecting element 15 arranged. Preferably, the rocker bearing 16 but essentially exactly in the middle of the tape 4 , based on its optimized center position stored.

The rocker bearing 16 thus forms during operation of the fixing machine 1 the middle of the band 4 with perfectly aligned band 4 ,

The rocker bearing 16 is at a base 17 attached, which is optional, this is not meant to be limiting in the direction of the band 4 is biased by means of one or more spring elements 18 , which can be designed as cylinders or as springs. By these spring elements 18 becomes the alignment device 12 at the same time as the band pretensioning device, by means of which the band is tensioned to a predefined degree. Due to the double function of the alignment device 12 Other band pretensioners may be omitted or, as in the embodiment according to 1 All other tape pretensioning devices are eliminated, so that only the alignment device 12 is used for tape bias.

Also the alignment device 11 can be carried out accordingly.

The deflecting element 15 is by an adjusting device 19 automatically pivoted when the tape 4 off-center or off-center by a certain amount. The adjusting device 19 is attached to one arm of the rocker so that only a single actuator is present.

For example, the adjusting device 19 at one of the two opposite ends 20 of the deflecting element 15 appropriate.

Preferably, the adjusting device is a piston-cylinder unit with a stroke pressure cylinder. Instead of a piston-cylinder unit and an electric drive can be provided.

The adjusting device is controlled 19 via an electronic control 21 connected to the sensor unit 14 is coupled.

Run the tape 4 in the middle, that is the adjusting device 19 deactivated, so that the deflecting element 15 around the rocker bearing 16 can swing freely, causing the tape 3 . 4 Usually leveled in its central position.

Dodge the band 3 . 4 then in the course of operation from the center position, the adjusting device 19 accordingly actuated so that the deflecting element 15 correspondingly pivots in one direction or the other to the band 4 returned to the center position.

The adjusting device 19 is always deflected by the same given stroke either in one direction or the other, regardless of whether the band is extremely or slightly off-center running.

This hub can be designed so that the deflection 15 in the optimal position, preferably in the horizontal position, but it can also go something beyond this position to the band 3 . 4 to give a stronger impulse in the opposite direction.

The control 21 is programmed so that the adjusting device 19 is deactivated again when the belt center or near reaching the center run, so that the deflection 15 again tilted freely. The ribbon 4 then settles again in the middle position. There are usually no post-corrections necessary, so that very few control pulses are sufficient.

Instead of a rigid bar or a rigid bar, the deflector 15 also be executed as a roll, which is in 2 symbolized by the center axis A of the role. Here is the deflector 15 so to speak, a multi-part rocker beam with a roller, which is mounted on a beam or bar, which in turn from the rocker bearing 16 is held pivotally.

In 4 is the sensor unit 13 . 14 shown at the edge 22 of the respective band 3 . 4 is positioned.

The sensor unit comprises one or more sensor heads 23 and clearly from the sensor heads 23 removes electronics with a transducer 24 , The distance between the transducer 24 and the sensor heads 23 is at least 50 mm and is via a signal transmission conductor 25 bridged, that of the sensor head 23 recorded signal to the transducer 24 forwards. An electronic circuit is thus close to the sensor head 23 not present, otherwise due to the strong heat radiation of heated to 200 ° C tapes 3 . 4 would be thermally stressed.

As with underlined lines in 4 shown, two opposite sensor heads 23 be provided, which are mounted on a fork.

The sensor units may be ultrasonic sensor units or also optical sensor units, accordingly the signal transmission conductor 25 a tube, a high temperature cable or a fiber optic cable.

The fuser 1 can be driven on inlet side or outlet side. The preferred embodiment provides that it is driven on the inlet side. This means the inlet side pulleys 5 . 7 are driven, but not the outlet side pulleys 6 . 8th ,

A common drive motor 30 for both bands 3 . 4 drives a train 31 , preferably a toothed belt, via a drive pinion 32 at. The train 31 is about corresponding gears, with the pulley 5 . 7 are coupled, looped, preferably also a deflection wheel 33 is present, as a tensioning unit for the Zugtrum 31 is executed. Despite different temperatures of the train 31 In the course of operation and different belt or Zugtrumspannung the Zugtrumspannung has no effect on the width of the press nip 9 ,

Claims (12)

Fixing machine for fixing superimposed textile layers ( 2 ), with circumferential, endless bands ( 3 . 4 ), at least one alignment device ( 11 . 12 ) for automatically resetting the assigned band ( 3 . 4 ) in the case of off-center striping, wherein the alignment device ( 11 . 12 ) extending transversely to the direction of tape travel (B), from the belt ( 3 . 4 ) contacted deflecting element ( 15 ), characterized in that the deflecting element ( 15 ) is formed as a pivotally mounted, part of a rocker forming rocker beam, wherein the rocker extends transversely to the strip running direction (B) and the rocker bearing ( 16 ) is arranged centrally to the belt, that an adjusting device ( 19 ) for pivoting the deflecting element ( 15 ) and that the actuator ( 19 ) with a controller ( 21 ) which is programmed so that the actuating device ( 19 ) deactivated in strip center run and the deflection ( 15 ) is freely tiltable. Fuser according to claim 1, characterized in that only on a rocker arm, preferably at one end of the rocker beam, an actuating device ( 19 ) is available. Fixing machine according to claim 1 or 2, characterized in that the adjusting device ( 19 ) is a piston-cylinder unit or an electric drive. Fixing machine according to one of the preceding claims, characterized in that the adjusting device ( 19 ) with a controller ( 21 ) which is programmed in such a way that, in the case of off-center strip running, the adjusting device ( 19 ) is adjusted in a predefined center position and the adjusting device is then deactivated upon reaching the center position, so that the deflecting element ( 15 ) is freely tiltable. Fixing machine according to one of the preceding claims, characterized in that the alignment device ( 11 . 12 ) is designed as a band biasing device. Fixing machine according to claim 5, characterized in that for forming the band pretensioning device the rocker bearing ( 16 ) against the band ( 3 . 4 ) is biased. Fixing machine according to one of claims 5 and 6, characterized in that the band biasing means at least one spring element ( 18 ), which the deflecting element ( 15 ) with a force against the band ( 3 . 4 ) presses. Fixing machine according to one of claims 4 to 6, characterized in that the alignment device ( 11 . 12 ) the only tape biasing device for the associated tape ( 3 . 4 ). Fixing machine according to one of the preceding claims, in particular according to the preamble of claim 1, characterized in that a sensor unit ( 13 . 14 ) is provided for tape edge detection, with a at the band edge ( 22 ), non-contact sensor head ( 23 ), an electronic transducer ( 24 ) away from the sensor head ( 23 ) and removed from the band ( 3 . 4 ) and the sensor head ( 23 ) with the signal converter ( 24 ) coupling signal transmission conductor ( 25 ). Fixing machine according to claim 9, characterized in that the signal transmission conductor ( 25 ) has a length of at least 50 mm. Fixing machine according to one of the preceding claims, in particular according to the preamble of claim 1, characterized in that the fixing machine ( 1 ) an inlet side for the textile layers ( 2 ) and an outlet side, with inlet-side and outlet-side deflection rollers ( 5 . 7 respectively 6 . 8th ) for the bands ( 3 . 4 ), wherein the inlet-side deflection rollers ( 5 . 7 ) Are drive rollers. Fixing machine according to claim 11, characterized in that the two inlet-side deflection rollers ( 5 . 7 ) of the two bands ( 3 . 4 ) about a train turn ( 31 ), in particular a toothed belt, are drivingly coupled to each other and driven.

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