EP2157224B1 - Method and device for producing in particular multi-layer workpiece - Google Patents

Description

The invention relates to a device for producing in particular multi-layered material, preferably mattress plates, as a section of a web, with a Mehrnadelnäheinrichtung, in particular a Vielnadelkettenstichnähmaschine, and one of the Mehrnadelnäheinrichtung in the conveying direction of the web downstream processing device, which is designed as Längsnäh- and cutting device and with the the Nähgutbahn is skirted and cut along its two longitudinal sides in the conveying direction, wherein the processing device has a sewing unit and a cutting device per longitudinal side of the Nähgutbahn. The invention furthermore relates to a method for producing, in particular, multi-layered sewing material, preferably mattress panels, as a section of a material web in which the sewing material web is hemmed and cut along its two longitudinal sides in the conveying direction by means of a processing device designed as a longitudinal sewing and cutting device.

Devices and methods of the generic type, that is for the production of in particular multi-layered fabric are known from the prior art, for example from the WO 2007/009516 A1 ,

By "material to be sewn" is meant, for example, mattress fabrics, in particular mattress top and / or side panels, quilts or the like. Mattress fabrics are used to re-tension mattress cores, this fabric in particular consisting of an upper material and a filler material, for example of foam, wherein the materials are sewn together. In such a case, the sewing material is multi-layered.

The from the WO 2007/009516 A1 Known apparatus for producing particularly multi-layered sewing material has a Mehrnadelnäheinrichtung designed as Vielnadelkettenstichnähmaschine. In the conveying direction of the Nähgutbahn the Vielnadelkettenstichnähmaschine is preceded by a storage device for individual Nähgutlagen. The individual fabric layers are removed with the formation of the fabric web of the storage device and fed in the conveying direction of the multi-needle sewing device, by means of which a sewing of the individual fabric layers takes place. The multi-needle sewing device preferably has a conveying device, by means of which the sewing material layers to be sewn are moved back and forth relative to the sewing elements of the multi-needle sewing device, namely the needles arranged on a needle bar and the grippers arranged on a gripper bar, in order to move predetermined patterns into the fabric layers or to desired ends to sew the sewing material.

The Mehrnadelnäheinrichtung is followed by a processing device in the conveying direction of the fabric web, which is designed as a longitudinal sewing and cutting device. By means of this processing device, the material web along its two longitudinal sides, that is, its two sides lined in the conveying direction and cut. In this case, the processing device has a sewing unit and a cutting device per longitudinal side of the material web.

In a further processing station then the ends or ends of the sewing materials are sewn at least two, preferably four or more seams transversely to the conveying direction of the sewing material and then the Nähgutbahn is cut between the seams for final formation of the sewing material between adjacent arranged Nähgüter a Nähgutbahn, due whose sewing materials arise as sections of a fabric web.

The above and for example from the WO 2007/009516 A1 Previously known apparatus for producing in particular multi-layered fabric has proven itself in everyday practical use. Nevertheless, there is a need for improvement, in particular with regard to the seaming and the cutting of the two longitudinal sides of the material web in the conveying direction. It has been found that the Nähgutbahn on their way from the Mehrnadelnäheinrichtung to the Mehrnadelnäheinrichtung downstream of the Nähgutbahn processing device can not be performed with sufficient accuracy, which is why it happens that the Nähgutbahn when entering the processing device transversely to the conveying direction and hike. As a result, the distance between the missed and cut longitudinal edges of the fabric web, on the one hand, and the sewing pattern introduced into the fabric web by means of the multi-needle sewing unit, on the other hand, disadvantageously varies. The moving back and forth of the Nähgutbahn can even lead to the Umsäumungsnaht and / or the Longitudinal cut enters the worn by the fabric web sewing pattern, resulting in an undesirable overall appearance of the final workpieces. It is therefore desirable to achieve improved Umsäumungs- and cutting accuracy with respect to the running in the conveying direction longitudinal sides of the fabric web.

It is therefore based on the above described the object of the invention to propose a device for the production of in particular multi-layered material, which allows improved with respect to the two extending in the conveying direction of the web of material webs of the webs Umsäumungs- and cutting accuracy. It should also be proposed a method for producing in particular multi-layered sewing material.

On the device side is proposed to solve the above problem that the sewing units and the cutting devices are formed transversely to the conveying direction of the web, the sewing units and / or the cutting devices via an independent of any sewing pattern in the Nähgutbahn existing reference element and / or signal in their movement relative to the web are controllable.

The proposed with the inventive device processing device has per longitudinal side to be hemmed and zuzuschneidenden Nähgutbahn a sewing unit and a cutting device, which may be preferably coupled in each case to a common Längsnäh- and cutting unit. The sewing units and the cutting devices, that is, in the case of their coupling, the respective longitudinal sewing and cutting units according to the invention formed transversely to the conveying direction of the Nähgutbahn movable, which makes it possible to align the sewing units and the cutting devices in their relative position relative to the position of the Nähgutbahn as desired.

The inventively provided possibility of positioning the sewing units and the cutting devices relative to the web of material has the advantage of making a desired and exact alignment of the Umsäumungsnähte and the cut edges against the sewing pattern provided by the Nähgutbahn. In this way, the sewing units and the cutting devices can be readjusted in particular in their relative position with respect to the material web when the material web travels back and forth transversely to the conveying direction as it enters the processing device. By means of the embodiment according to the invention, it is thus ensured that undesired introduction of a longitudinal seam and / or a longitudinal cut into the sewing pattern of the sewing material web is avoided.

It is further provided according to the invention that the sewing units and / or the cutting devices can be controlled in their movement relative to the material web by means of a reference element and / or signal present independently of any sewing pattern in the material web. This embodiment according to the invention has the advantage that a positionally accurate seaming or a position-accurate blank can be effected independently of a sewing pattern present in the sewing material web. It can thus also seams such as desired seams and cut, which have no pattern and / or have a pattern which can not be used as a possible reference for a Umsäumung or a blank, which is the case for example in a pattern, the does not have a parallel to the later Säumungsnaht and / or cutting edge extending pattern line, as is the case for example in part-circular pattern designs, as they are used in particular in the field of mattress panels.

As independent of the sewing pattern reference elements and / or signals come, for example, in the Nähgutbahn introduced coding threads, optical elements, such as colored lines and / or the like in question. As coding threads, for example, magnetic threads, color-contrasting marking threads or the like can be used by the sewing material in a detectable manner distinguishable threads.

As a reference can also serve a box cut at infinity parallel to the fabric web.

With the invention, a device is proposed as a whole, according to which it is possible to move the sewing units and cutting devices of the processing device transversely to the conveying direction of the Nähgutbahn, wherein the movement is controllable relative to the Nähgutbahn, by means of a reference element and / or signal, which independently from any sewing pattern of the fabric web. A desired longitudinal seaming or a desired longitudinal cutting of the material web can thus be ensured independently of any sewing pattern of the material web. Known prior art devices do not allow this.

Depending on the longitudinal side of the material web, the processing device provides a longitudinal sewing and cutting unit each having a sewing unit and a cutting device. These two longitudinal sewing and cutting units can be coupled to each other in their relative mobility transversely to the conveying direction of the web. A method of a longitudinal sewing and cutting unit then automatically leads to a similar process of the other longitudinal sewing and cutting unit. To reduce in particular the regular effort for the positionally accurate positioning of the longitudinal sewing and cutting units is the coupling of the two longitudinal sewing and cutting units preferred. However, it is also within the scope of the invention to be able to control and move the two longitudinal sewing and cutting units of the processing device independently of one another. Such a configuration results in particular for the case that the Nähgutbahn areas of different width, that is, with different distances between the longitudinal edges extending in the conveying direction, that is, should have long sides.

It is provided according to a further feature of the invention that the processing device has a control or regulating unit, which in turn has a measuring device and a comparison device, wherein the measuring device serves to position the Nähgutbahn relative to the position of the sewing units and / or the To detect cutting devices, and wherein the comparison device compares the detected by the measuring device actual position with a predetermined target position.

According to this particular proposal of the invention, a summarized to a control or regulating unit measuring device and comparator are provided. The measuring device serves to detect the relative position of the material web with respect to at least one, but possibly also both Längsnäh- and cutting units of the processing device, that is opposite to the sewing units and / or the cutting means of the processing device. By means of the measuring device so the actual actual position of the fabric web is determined. The measuring device outputs a signal corresponding to the determined actual position of the material web to the comparison device, by means of which a comparison can then be made between the determined actual position on the one hand and a predefinable desired position on the other hand. If this comparison results in a deviation, a positional correction of the longitudinal sewing and cutting units is carried out by moving them transversely to the conveying direction of the sewing material web. In the event that the longitudinal sewing and cutting units of the processing device are coupled together, both longitudinal sewing and cutting units are moved in the same way or simultaneously. If the longitudinal sewing and cutting units according to the aforementioned alternative embodiment of the invention are not coupled to one another but can be moved independently of one another, then both longitudinal sewing and cutting units are activated.

For detecting the actual position of the material web, the measuring device preferably has a sensor. This sensor can be designed as a light sensor, as a color sensor, as a magnetic sensor or the like. Which of the above-mentioned sensors is used depends above all on which output parameters are available for detecting the position of the material web. Thus, for example, according to a first embodiment of the invention, it can be provided that the sewing material web runs along a their two long sides carries a color marking as a reference element. In this case, the use of a color sensor is particularly suitable. Instead of a color marking but can also be made by means of a longitudinally extending magnetic thread, which allows the use of a magnetic sensor. In the simplest case, however, it is also possible to use light sensors, for example in the form of light barriers, which are arranged on the edge of a longitudinal side of the material web and detect the light beam interruption as a result of the migration of zones of web material.

It is proposed in this context with the invention in particular that the measuring device comprises two light source reflector units, each having a light source and a light source associated with the reflector, wherein the light sources in a plane above the Nähgutbahn and the reflectors in a Level are arranged below the Nähgutbahn.

The two light source reflector units are preferably arranged side by side with respect to a direction transverse to the conveying direction. When the material web is intended to be aligned, the reflector closest to the material web is covered by the material web. The reflector of the second light source-reflector unit, however, is uncovered by the Nähgutbahn. Should it come in the course of processing the Nähgutbahn to emigrate the same in a direction transverse to the conveying direction of the web, the Nähgutbahn runs either from the one, concealed in the intended case light source-reflector unit or in the case in the intended unobstructed light source-reflector unit inside. It can thus be detected with respect to the conveying direction of the fabric web both migrations of the fabric web to the left and to the right.

The above-described control device advantageously allows automatic operation. Manual adjustments by operators or the like are not required. Rather, the longitudinal sewing and cutting units of the processing device regulate themselves in their relative position to the fabric web, so that a positionally accurate configuration of the seam seams running in the longitudinal direction as well as the cutting edges running in the longitudinal direction are always ensured.

It is provided according to a further feature of the invention that in the conveying direction of the fabric web between the Mehrnadelnäheinrichtung and the processing means designed as a guiding and / or balancing device intermediate station is arranged. This guiding and / or compensating device serves on the one hand as a material buffer for the multi-needle sewing device leaving the conveyor belt in the conveying direction and for an alignment of the material web with respect to the processing device.

The method side is proposed to solve the above problem, a method for producing particularly multi-layered fabric, preferably mattress panels, as a section of a fabric web, wherein the Nähgutbahn is surrounded and cut by means designed as Längsnäh- and cutting device processing along its two longitudinal sides in the conveying direction, wherein the processing device has a sewing unit and a cutting device for each longitudinal side of the sewing material web, which are aligned in their relative position relative to the position of the web of material transversely to the conveying direction of the web, wherein the sewing units and / or the cutting devices via an independent of any sewing pattern in the Nähgutbahn existing Reference element and / or signal are controlled in their movement relative to the web.

In accordance with the method according to the invention, an alignment of the sewing unit provided on the longitudinal side of the material web and / or of the cutting device takes place relative to the web of sewing material so that a positionally accurate seaming seam and a positionally accurate cutting edge per longitudinal side of the material web are achieved in an advantageous manner.

In this case, the invention provides that the sewing units and / or the cutting devices are controlled in their movement relative to the Nähgutbahn. For this purpose serve reference elements and / or signals, which are independent of any sewing pattern of the fabric web. The method implementation according to the invention thus takes place in an advantageous manner without any reference to any Nähgutbahnmuster.

The method is advantageously fully automatic, that is unwound without the intervention of operating personnel, which is advantageously possible in that a control or regulating unit is provided with a measuring device, the relative position of the web against the position of the sewing unit and / or detects the cutting device and outputs a detected position of the corresponding actual signal, which is compared by means of a comparison circuit with a predetermined setpoint, depending on the determined comparison of actual signal on the one hand and setpoint on the other hand, an adjustment of the sewing unit and / or the cutting device transverse to Conveying direction of the web takes place.

The measuring device determines the position of the Nähgutbahn relative to the position of the sewing unit and / or the cutting device preferably by means of a sensor, which sensor may be a light sensor, a color sensor, a magnetic sensor or the like.

Fig. 1

in einer schematischen Darstellung eine Vorrichtung zur Herstellung von insbesondere mehrlagigem Nähgut gemäß dem Stand der Technik nach der WO 2007/009516 ;

Fig. 2

in einer schematischen Ausschnittsdarstellung die Vorrichtung zur Herstellung von insbesondere mehrlagigem Nähgut gemäß der Erfindung;

Fig. 3

in einer Draufsicht von oben die Vorrichtung nach der Erfindung gemäß Fig. 2;

Fig. 4

in einer Draufsicht von oben eine Nähgutbahn;

Fig. 5

in einer schematischen Darstellung die erfindungsgemäße Verfahrensdurchführung;

Fig. 6

in einer Draufsicht von oben eine nach dem erfindungsgemäßen Verfahren hergestellte Nähgutbahn;

Fig. 7

in einer Draufsicht von oben eine ohne die erfindungsgemäße Verfahrensdurchführung hergestellte Nähgutbahn;

Fig. 8

in einer Draufsicht von oben eine zur erfindungsgemäßen Verfahrensdurchführung markierte Nähgutbahn;

Fig. 9

in einer Draufsicht von oben eine erfindungsgemäß hergestellte Nähgutbahn gemäß Fig. 8;

Fig. 10

eine erfindungsgemäße Verfahrensdurchführung mit Bezug auf eine mit einer Markierung versehenen Nähgutbahn gemäß Fig. 8 und

Fign. 11a bis 11c

in jeweils schematischer Darstellung die erfindungsgemäße Verfahrensdurchführung mittels Lichtschranken.

Further features and advantages of the invention will become apparent from the following description with reference to FIGS. Show

Fig. 1

in a schematic representation of an apparatus for producing in particular multi-layered material according to the prior art according to the WO 2007/009516 ;

Fig. 2

in a schematic sectional view of the apparatus for producing in particular multi-layered material according to the invention;

Fig. 3

in a plan view from above the device according to the invention according to Fig. 2 ;

Fig. 4

in a plan view from above a Nähgutbahn;

Fig. 5

in a schematic representation of the method according to the invention;

Fig. 6

in a plan view from above a Nähgutbahn produced by the method according to the invention;

Fig. 7

in a plan view from above a Nähgutbahn produced without the method according to the invention;

Fig. 8

in a plan view from above a marked for carrying out the method according to the invention Nähgutbahn;

Fig. 9

in a plan view from above an inventively produced Nähgutbahn according to Fig. 8 ;

Fig. 10

a method according to the invention with respect to a provided with a marker fabric according to Fig. 8 and

FIGS. 11a to 11c

in a schematic representation of the process implementation according to the invention by means of light barriers.

Fig. 1 shows a schematic representation of an apparatus for producing particularly multi-layered fabric, as for example from the WO 2007/009516 A1 is known.

The device for producing in particular multi-layered material after Fig. 1 in the form of a multi-needle chain stitch sewing machine has a Mehrnadelnäheinrichtung 2. The Mehrnadelnäheinrichtung 2 is in the conveying direction 6 of the web 5 Nähgutlagenbeforratungseinrichtung 3 upstream. A processing device 4 is connected downstream of the multi-needle sewing device 2 in the conveying direction 6 of the sewing material web 5.

The Nähgutlagenbeforratungseinrichtung 3 has a plurality of winding 7 with fabric layers, which are subtracted from the reels 7 and the Mehrnadelnäheinrichtung 2 fed. In this case, the individual sewing fabric layers sewn together form the sewing material web 5 leaving the multi-needle sewing device in the conveying direction 6.

In the conveying direction 6 of the sewing web 5, a Nähgarnbevorratungseinrichtung 8 is provided with a plurality of sewing thread bobbins 9, of which the sewing yarn required for the sewing process is subtracted between the Nähgutlagenbevorrungungseinrichtung 3 and the Mehrnadelnäheinrichtung 2.

In the multi-needle sewing device 2 downstream in the conveying direction 6 processing device 4, the web 5 is folded over with respect to their running in the conveying direction 6 longitudinal edge, that is provided with a running in the longitudinal direction of the web 5 seaming seam on both sides and tailored on both sides. By means of corresponding rollers 13, the material web 15 is guided by the multi-needle sewing device 2 to the processing device 4. In this case, an intermediate station 12 is interposed in the conveying direction 6 between the Mehrnadelnäheinrichtung 2 and the processing device 4, which may be, for example, a Nähgutbahnpufferstation.

The processing device 4 is followed by a cutting station 10 in the conveying direction 6 of the web 5, which cuts the web 5 in sections by means of a cutting tool 11, in a direction transverse to the conveying direction 6. A section of the web separated by the cutting station 10 forms the finished fabric ,

According to the invention, the processing device 4, that is to say the processing station arranged in the conveying direction 6 of the sewing material web 5 between the multi-needle sewing device 2 and the cutting station 10, is improved, as can be seen from the following FIGS. 2 to 11 c results.

The processing device 4 has with respect to the conveying direction 6 of the web 5 on the left and right side each have a longitudinal sewing and cutting unit, each longitudinal sewing and cutting unit 14, 15 each have a sewing unit on the one hand and a On the other hand cutting device has. As in particular the representation after Fig. 3 can be seen wearing with respect to the conveying direction 6 of the web 5 on the left side longitudinal sewing and cutting unit, the reference numeral 15, whereas the right side with respect to the conveying direction 6 of the web 5 formed longitudinal sewing and cutting unit carries the reference numeral 14.

Each Längsnäh- and cutting unit 14, 15 serves to skirt the respective associated longitudinal edge of the fabric web 5, that is to be provided with a running in the longitudinal direction of the conveying direction 6 seaming seam and cut, that is to cut the Nähgutbahn 5 beyond the Säumungsnaht. For the formation of seaming seam, the respective sewing unit, which has, for example in the form of a needle via a sewing organ. For longitudinal cutting, the respective longitudinal cutting and cutting unit 14, 15 provided cutting device, which may have, for example, a cutting element in the form of a disc-shaped blade.

In Fig. 4 is shown in plan view from above a piece of fabric sewing 5. This is in the longitudinal direction, ie longitudinally in the conveying direction 6 by their longitudinal sides, ie side edges limited, wherein the left in the conveying direction 6 longitudinal side reference numeral 17 and the right in the conveying direction 6 longitudinal edge carries the reference numeral 18. In the Nähgutbahn 5 a sewing pattern 16 is introduced, as shown by way of example. The left-hand gap with respect to the conveying direction 6 between the left side edge 17 of the sewing material web 5 and the left-hand end of the pattern 16 is designated A _L. A corresponding distance is located on the right side, which is designated by A _R.

The distances A _L and A _R are not well defined and may vary due to a traveling movement of the web 5 with respect to a direction transverse to the conveying direction 6. To compensate for such fluctuations, the inventively designed device or the method according to the invention is used, as can be seen from Fig. 5 results.

The in Fig. 5 only schematically illustrated processing device 4 in the conveying direction 6 along its longitudinal sides 17 and 18 to be skirted and zuzuschneidende Nähgutbahn 5 is supplied. After leaving the processing device 4 in the conveying direction 6, the Nähgutbahn 5 is provided with respect to the conveying direction 6 on both sides with a seam seam and cut, with the reference to the conveying direction 6 left-sided hem seam the reference numeral 21 and the right-hand hem seam carries the reference numeral 22. The left-hand cut edge with respect to the conveying direction 6 is identified by the reference numeral 19. The right-hand cutting edge bears the reference numeral 20. The distance between these two Cut edges 19 and 20 are indicated by A.

The longitudinal sewing and cutting units 14 and 15 provided by the processing device 4 can be positioned transversely to the conveying direction 6 relative to the sewing web 5, so that they can be aligned as desired in order to be able to compensate for any traveling movements of the sewing web 5 transversely to the conveying direction 6 and thus to ensure in that the distances A _L and A _{R are} virtually identical, as shown by way of example in FIG Fig. 6 is shown. To control the movement of the longitudinal sewing and cutting units 14 and 15 are reference elements and / or signals, which are independent of any sewing pattern 16 of the fabric web according to the invention.

Fig. 7 shows an embodiment of cut edges 19 and 20 or seams 21 and 22, as they can form disadvantageously with a device according to the prior art. As can be clearly seen, the distances A _L and A _R are very different compared to each other, which disturbs the overall appearance of the entire fabric web 5 in a disadvantageous manner. In the case of devices known from the prior art, it may even happen that the cut edges and / or seam seams run into the pattern 16 of the sewing web 5. With the embodiment according to the invention this is avoided, as the representation after Fig. 6 shows.

In order to be able to align the longitudinal sewing and cutting units 14 and 15 as desired, a marking in the form of a marking line 23 may be provided as a reference element independent of a sewing pattern 16 of the sewing material web 5 according to a first alternative embodiment of the invention. This marking line 23 may be, for example, a color mark applied in a simple manner or a sewn metallic, preferably magnetically metallic thread. The marking line 23 is formed at a defined distance A _R to the pattern 16, as shown by Fig. 8 lets recognize. Will now, as in the rest of the basis of the FIGS. 9 and 10 will be described along the defined marker line 23 cut along, then results in firmly coupled together longitudinal sewing and cutting units 14 and 15, the undefined distance A _L , that is the left side in the conveying direction 6 distance between the pattern 16 and side edge 17 of the fabric 5 automatically.

A synopsis of FIGS. 9 and 10 1 shows that a sewing material web 5 equipped with a marking line 23 with respect to one of its longitudinal sides is introduced into the processing device 6 in the conveying direction 6. By means of a sensor 24 which scans the marking line 23, an alignment of the longitudinal sewing and cutting units 14 and 15 takes place. Here, the sensor 24 of the longitudinal sewing and cutting unit 14 is assigned, wherein a control device is provided which by means of a measuring device and a Comparative circuit aligns the longitudinal sewing and cutting unit 14 as desired and in precise position on the marking lines 23. The longitudinal sewing and cutting unit 14 is coupled with respect to its to the conveying direction 6 Querverfahrbarkeit with the longitudinal sewing and cutting unit 15 so that it is aligned with an adjusting movement of the longitudinal sewing and cutting unit 14 with.

As can be seen in particular Fig. 10 results after aligning the longitudinal sewing and cutting units 14 and 15 a positionally accurate training of both the cutting edges 19 and 20 and the Säumungsnähte 21 and 22, in such a way that the pattern 16 of the fabric web 5 substantially centrally with respect to the distance A is aligned between the cutting edges 21 and 22.

The FIGS. 11a to 11c show a second alternative embodiment of the invention, according to the light barriers in the form of light source-reflector units 25 and 26 are used, which generate a reference signal regardless of a possible sewing pattern of the web 5.

As the FIGS. 11a to 11c can be seen schematically, the Nähgutbahn 5 are juxtaposed with respect to one of its longitudinal sides two light source reflector units 25 and 26.

A light source / reflector unit 25 or 26 has a light source 27 or 28 and a respective light source associated reflector 29 and 30. Between the light source and the respective associated reflector of a light source-reflector unit is in a conventional manner formed a light beam 31 and 32, respectively.

Fig. 11a shows a starting position of the fabric web 5. In this starting position the Nähgutbahn 5 projects with its one edge into the first light source reflector unit 25, with the consequence that the associated first reflector 29 is hidden and the first light beam 31 is interrupted. In this starting position, the Nähgutbahn 5 is in its zero position.

The Fig. 11b shows a position of the Nähgutbahn 5, according to which it has emigrated with respect to the plane of the drawing to the left. As Fig. 11b can be seen, the first reflector 29 of the first light source reflector unit 25 in this position of the fabric web 5 is not further obscured. As a result, the over-wandering of the sewing material web 5 is recognized to the left and the sewing units or cutting devices can be readjusted in the manner described above, that is, in this case, with reference to the plane of the drawing to the left, until the coupled light source- Reflector units 25 and 26 in their relative position relative to the Nähgutbahn 5 again in FIG. 11a assume the initial position shown.

Fig. 11 c shows too far emigration of the Nähgutbahn 5 with respect to the plane of the drawing to the right. In this position, the marginal edge of the fabric web 5 has migrated into the light source-reflector unit 25 and 26, so that both the first reflector 29 and the second reflector 30 concealed and both the first light beam 31 and the second light beam 32 are interrupted. As a result, the too far emigration of the Nähgutbahn 5 is detected with respect to the plane of the drawing to the right and the sewing units and / or cutting devices are moved in the manner described above in their relative position to the fabric web 5 transversely to the conveying direction 6 to the right, so far, until the associated light source reflector units 25 and 26 assume their relative position relative to the fabric web 5 again, as in Fig. 11a is shown.

As the FIGS. 11a to 11c show the sewing units and / or cutting devices at a position of the web 5 according to Fig. 11b in the direction of travel 33 with respect to the plane of the drawing to the left. Otherwise, as in Fig. 11 c is shown, in the direction of travel 34, that is, with reference to the plane of the drawing to the right.

LIST OF REFERENCE NUMBERS

1

contraption

2

Mehrnadelnäheinrichtung

3

Nähgutlagenbevorratungseinrichtung

4

processing device

5

Nähgutbahn

6

conveying direction

7

reel

8th

Nähgarnbevorratungseinrichtung

9

Nähgarnspule

10

cutting station

11

cutting tool

12

stopover

13

roll

14

Longitudinal sewing and cutting unit right

15

Longitudinal sewing and cutting unit left

16

template

17

Long side sewing material left

18

Long side of sewing material right

19

Cutting edge of material to be sewn on the left

20

Cutting edge of fabric right

21

Hem seam left

22

Hem seam on the right

23

marking line

24

sensor

25

first light source reflector unit

26

second light source reflector unit

27

first light source

28

second light source

29

first reflector

30

second reflector

31

first light beam

32

second light beam

33

Travel direction to the left

34

Travel direction to the right

A _L

Distance left

A _R

Distance right

A

distance

Claims (10)

1. A device for producing in particular multi-layer sewn fabric, preferably mattress plates, as sections of a sewing fabric web (5), comprising a multi-needle sewing device (2), in particular a multi-needle chain stitch sewing machine, and a processing device (4) which is located downstream of the multi-needle sewing device with respect to the conveying direction (6) of the sewing fabric web (5), which processing device is designed as a longitudinally sewing and cutting device, by means of which the sewing fabric web (5) is hemmed and cut to seize along its two long sides (17, 18) oriented in the conveying direction (6), wherein the processing device (4) comprises one sewing aggregate and one cutting device for each long side (17, 18) of the sewing fabric web (5),
   characterized in
   that the sewing aggregates and the cutting devices are adapted to be displaced transversely to the conveying direction (6) of the sewing fabric web, wherein the displacement of the sewing aggregates and/or the cutting devices with respect to the sewing fabric web (5) can be controlled by a reference element and/or signal which is present in the sewing fabric web (5) independently from a pattern (16) that is possibly present on the web.
2. A device according to claim 1, characterized in that the processing device (4) comprises a control unit which on its part has got a measuring device and a comparing device, wherein the measuring device serves to detect the position of the sewing fabric web (5) with respect to the sewing aggregates and/or the cutting devices and wherein the comparing device compares the actual position detected by the measuring device to a pre-determinable target position.
3. A device according to claim 2, characterized in that the measuring device comprises a sensor (24), preferably a light, colour, magnetic sensor and/or suchlike sensor.
4. A device according to claim 2, characterized in that the measuring device comprises two light source/reflector units (25, 26), each of which possesses a light source (27, 28) and a reflector (29, 30) assigned to the light source, wherein the light sources (27, 28) are located on a level above the sewing fabric web (5) and the reflectors (29, 30) are located on a level beneath the sewing fabric web (5).
5. A device according to one of the preceding claims 2 through 4, characterized in that one measuring device is provided for each long side (17, 18) of the sewing fabric web (5).
6. A device according to claim 1, characterized in that an intermediate station (12) designed as guiding and/or compensating device is placed between the multi-needle sewing device (2) and the processing device (4) in the conveying direction (6) of the sewing fabric web (5).
7. A method for producing in particular multi-layer sewn fabric, preferably mattress plates, as sections of a sewing fabric web (5), in which the sewing fabric web (5) is hemmed and cut to seize along its two long sides (17, 18) oriented in the conveying direction (6) by means of a processing device (4) designed as longitudinally sewing and cutting device, wherein the processing device (4) comprises one sewing aggregate and one cutting device for each long side (17, 18) of the sewing fabric web (5), wherein the relative position of the sewing aggregate and the cutting device with respect to the position of the sewing fabric web (5) is oriented transversely to the conveying direction (6) of the sewing fabric web (5), wherein the displacement of the sewing aggregates and/or the cutting devices with respect to the sewing fabric web (5) is controlled by a reference element and/or signal which is present in the sewing fabric web (5) independently from a pattern (16) that is possibly present on the web.
8. A method according to claim 7, characterized in that the relative position of the sewing fabric web (5) with respect to the position of the sewing aggregates and/or the cutting devices is detected by a measuring device and an actual signal corresponding to the detected position is put out.
9. A method according to claim 8, characterized in that the actual signal sent out by the measuring device is compared to a pre-determinable set value by a comparing device and the sewing aggregates and/or cutting devices are displaced transversely to the conveying direction (6) of the sewing fabric web (5) in dependence on the comparison of the actual signal and the set value.
10. A method according to claim 8, characterized in that the measuring device determines the position of the sewing fabric web (5) with respect to the position of a sewing aggregate and/or a cutting device by means of a sensor, preferably a colour sensor, a magnetic sensor and or suchlike sensor.

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