EP3165635B1 - Stretching device - Google Patents

Description

The invention relates to a stretching device, i.e. a device that is able to draw in slivers, for example from several cans, then lay them next to one another, stretch them and combine them into a new, single sliver, which preferably has the same width dimensions as each of the drawn-in slivers , several slivers. In the context of the application, the width dimension means the extent of the sliver in any direction transverse to the longitudinal extension of the sliver.

For drawing in the sliver, gate arrangements are usually used in which cans are arranged next to one another in one or more rows, viewed along their longitudinal extension. Usually up to ten slivers can be drawn into a drafting system.

The problem is that a large number of routes are necessary in the context of a processing chain from raw fibers such as cotton fiber bales or man-made fibers to roving. This leads to an increased space requirement, since each individual route must be accessible. Simply juxtaposing several routes does not reduce this problem.

Therefore, so-called double routes were developed. These have two drafting systems which, viewed along their length, are arranged very close to one another. In addition, this enables the use of three-row gate arrangements in which 1½ longitudinal rows can be provided for each of the two drafting devices. Both drafting systems are placed close to each other and effectively connected to each other by means of waves Both drafting systems are driven by one motor through a common drive train. The entire machine periphery (control cabinet, control, extraction / filter box and display) is only required once. Since the machines always run simultaneously, only one gate arrangement is required. This means that very little space can be used, and the performance of two lines or drafting systems can still be used. The problem of land use becomes greater the more transverse rows of cards are provided one behind the other, the fiber slivers of which are to be stretched.

Since both drafting units are drive-coupled to one another, both drafting units work or both are at a standstill. If a malfunction occurs on one drafting system and it has to be temporarily shut down, this automatically also affects the second drafting system. This leads to the fact that, although possible, the drafting system, which is intact per se, cannot work, which unnecessarily reduces the throughput and thus the performance of the entire drafting device or double section. This is particularly annoying when maintenance or service work is necessary in the meantime on only one drafting system.

In addition, these drafting devices can only be operated from their outer sides and from the side of the double section facing away from the gate arrangement. I. E. the person concerned is always in a danger area with regard to vehicles driving around, for example.

Apart from that, such drafting systems usually do not work identically synchronously with one another. Also, the cans that are to feed the sliver to the drafting system are usually not necessarily filled identically. So it can happen that a drafting system has the associated Can empty faster than the other. In this case, both drafting systems may have to be stopped in order to change the feeder can (s) in question, although the other drafting system could continue to work. This also reduces the efficiency of such a double line.

And since both drafting systems are operated by one and the same drive, both drafting systems are always operated at the same speed to each other. I. E. Both drafting systems must be fed with the same fiber material from the same number of cans. In addition, these double distances are only variable in relation to the respective processing process, as the speed of the driven rollers allows; this is fixed due to the drive coupling. All settings (drafts, delivery speed, belt number) for both drafting systems must be identical, in particular the drafting field widths. The drafting devices can therefore only ever be used for the same material or for the same passage. In the case of uneven number of pre-sections according to the spinning plan, one more section must always be supplied. Overall, there is less flexibility when using such double routes.

From the DE 10 2008 000 920 A1 a double-head draw frame is known whose drawing units can be mechanically decoupled from one another. It is also known to be able to set and / or control both drafting devices via at least one control panel.

The EP 0 799 916 A2 discloses a device for forming a sliver, in which the sliver formed by a first drafting device of this device is fed to a second drafting device of the same device. The second drafting system can be switched off via a control unit and a clutch while the first drafting system continues to run. The U.S. 3,295,170 A discloses a drafting system with a downstream fan which is arranged

The object of the invention is to counter these disadvantages.

This object is achieved by the subject matter of claim 1. Advantageous further developments of the invention are specified in the subclaims.

According to the invention, a stretching device is provided which has two stretching units. Each of these two drafting devices has, in a known manner, an intake section, a drafting section and an output section. The intake section is designed to convey sliver from the outside in relation to the associated drafting device in the direction of the drafting section of the associated drafting device. This stretching section is designed to stretch and equalize the conveyed sliver according to predetermined specifications. The output section, in turn, is designed to discharge the stretched and evened fiber sliver from the associated drafting system to the outside. This is done in the usual way by placing it in a jug. Furthermore, each drafting system has its own drive device. This is designed to drive the sections, that is to say the intake section, the drawing section and / or the output section of the same, associated drawing device. The drive devices of the drafting systems are configured to work independently of one another.

According to the invention, the stretching device also has a single, central operating unit. This is set up to enable a user to operate the two drafting systems at least independently of one another to configure and / or control. Since the drive devices of the drafting units are configured to work independently of one another, the drafting units can work in coordination with one another, but this is done independently of one another. There is no coupling between the two drafting units which could lead to both drafting units being operated mechanically in relation to one another. This has the advantage that, for example, the failure of one drafting system does not lead to the necessary standstill of the other drafting system. Another advantage is that both drafting units can still be arranged in a space-saving manner. The central control unit turns the self-sufficient drafting units or drafts into a very variable (double) drafting unit. This fulfills the requirement for efficient use of space and universal operability.

As an alternative or in addition to the aforementioned operating unit, the stretching device according to the invention further comprises an air extraction device. This is fluidically coupled to the stretching sections in such a way that the air extraction device is able to suck in air from the stretching sections in the direction of the air extraction device. I. E. During the stretching operation, foreign substances such as dirt particles and unwanted fibers are transported away from the area of the respective stretching section as usual, in that air is preferably sucked off by negative pressure. Furthermore, the air extraction device is designed to interrupt the air extraction from a respective one of the two stretching sections. The air extraction device is therefore able to continue working when the associated drafting system is at a standstill, for example due to a fault in relation to the other drafting system, and nevertheless no longer suck in any air from the stationary, associated drafting system. In this way, the malfunction on the associated drafting system can be eliminated. There is thus a single drive for the air extraction device, for example in the form of a fan for two drafting systems possible, which enormously reduces the installation space for the otherwise two necessary air extraction devices. This benefits the small footprint of the entire double route.

Each dispensing section preferably has a can changer. This makes it possible to change the cans of one drafting system while the other can continue to work.

The can changers are preferably designed as linear changers and extend parallel to the longitudinal extension of the respectively associated drafting device. This enables a particularly narrow arrangement of all components of the respective drafting system and thus of the entire drafting device.

Each of the aforementioned stretching devices can also have a connecting section. This is, seen in the longitudinal extension of the two drafting devices, arranged between the two drafting devices. As a result, the two drafting devices are arranged at a distance from one another, at least in the area of the connecting section. Last but not least, the connecting section extends in the longitudinal direction of the two drafting units. I. E. the connecting section only widens the entire arrangement by its own width. This enables a user to simultaneously have access to both drafting devices at one and the same point, namely in the area of the connecting section. The drafting devices surrounding him protect the user from possible dangers such as vehicles driving around or the like. Another advantage is that only the width of the connecting section is additionally required to operate both drafting devices. If this connecting section were missing and the drafting systems were set up directly adjacent to one another, the operation would have to be at least on one outside of the Stretching device space can be provided. Access to the gate arrangements from outside can also be realized in this way via the intermediate section, combined with a lower risk of accidents. I. E. the space is used optimally. A second stretching device could, viewed along its longitudinal extension, be arranged directly adjacent to the stretching device described here.

The connecting section is preferably attached to at least one of the two drafting devices. The connecting section thus forms a structural unit with the attached drafting device (s). This facilitates the assembly, arrangement and alignment of all components of the stretching device with respect to one another.

Preferably, each of the aforementioned connecting sections forms a passage between the two drafting devices of the associated drafting device along their longitudinal extension. Thus, with the aid of the connecting section, the drafting devices are accessible from both ends of the connecting section, that is to say from the side of the sliver feed (intake section) and from the side of the sliver discharge (output section). This makes operation more convenient and universal with regard to the respective local conditions.

When such a connecting section is present, the operating unit is preferably arranged at one end of the connecting section, viewed in the longitudinal direction of the drafting devices. This enables access to other parts of the drafting system, such as housing parts that have to be opened or removed in order to remove, for example, dirt from the respective drafting system in the form of lost fibers that have not been sucked off.

Each of the aforementioned connecting sections can be provided with a pedestal section. As the name suggests, this has a predetermined height in relation to a floor on which the stretching device is arranged. This makes it possible, at least for the operation of the drafting devices and / or drive devices, to install the cabling under the floor, i. H. to be able to lay under the connecting section. In this way, for example, both drafting devices or their drive devices can be supplied with energy from one side of the drafting device. It is also possible to couple the control unit with the drafting systems or their controls in an elegant way. Also, if present, the pipe connection required for the air extraction device from one drafting system to the other drafting system, where the fan is usually arranged, can be formed under the floor, so it is not in the way.

If such a pedestal section is provided, the connecting section is preferably also provided with at least one ramp-like or stair-like stairway section. This is designed to rise from a free end of the connecting section along the longitudinal extension of the two drafting devices in the direction of the pedestal section and attached to the pedestal section or formed in one piece with it. This provides a simple way of getting to the platform section. The ramp can be provided in order to be able to roll up a container and fill it with the aforementioned dirt.

In all of the above-mentioned stretching devices, the operating unit can be attached to one of the two stretching units. A type of master-slave arrangement can thus be created. The drafting system with control unit forms the master, which would also function without the other drafting system, the slave. It is therefore possible to use the drafting system ex works as To be provided individually or as a master device, depending on whether the control unit is coupled to another drafting system or not. This enables a standardized drafting system and thus helps to reduce manufacturing costs.

As an alternative, the operating unit or only one possibility of attachment for it can be attached to each of the connecting sections mentioned, if such a section is present. This has the advantage that the drafting devices can be designed to be functionally identical, apart from a possible mirror-image arrangement of their components to one another. In any case, the drafting devices do not have to be provided with a construction with regard to an operating unit, which enables standardized drafting devices, combined with low production costs.

If the aforementioned air extraction device is present, the interruption of the air extraction is preferably implemented in that an influencing device is provided between at least one of the respective stretching sections and the air extraction device. This is designed to block an air flow connection from the at least one stretching section to the air extraction device in a first operating state. I. E. in this state, for example, the aforementioned disturbance at the same stretching section can be eliminated. Accordingly, the air extraction device is also designed to release the air flow connection, in a second operating state different from the first operating state, from the at least one stretching section to the air extraction device. I. E. this operating state is provided in order to remove the aforementioned foreign matter from the associated drafting system. The air flow from the drafting device does not have to be interrupted by switching off the air extraction device, but the air flow is simply diverted and thus "bypasses" the drafting device; it is therefore a kind of bypass solution. This enables the air extraction device according to the invention to be implemented in a simple manner.

The first or second operating state is preferably brought about by operating the influencing device. Accordingly, the second or first operating state is brought about by not operating the influencing device. This makes it possible to achieve one of the two operating states without operating the influencing device and thus without external electrical energy, which benefits energy consumption.

Instead, a bistable influencing device can also be provided. This is designed to bring about a change from the first to the second operating state or back again during operation. I. E. the actual operating states can be maintained without an external power supply. This can be done, for example, by latching, which further reduces the overall energy requirement.

Each of the aforementioned influencing devices can preferably have a blocking element. In a blocking position corresponding to the first operating state, the blocking element releases an air flow between an area which is fluidically isolated from the stretching section and the air extraction device. In terms of flow technology, it means that in this position, due to the construction of the double section, it is practically impossible to suck air out of the associated section; there is no air flow generated by the air extraction device in the area of this drafting system. Air is advantageously sucked in from the outside in relation to the double path. Accordingly, in a release position corresponding to the second operating state, the blocking element provides an air flow between the at least a stretching section and the air extractor free. The release position thus corresponds to the normal operating position in order to transport foreign matter out of the associated stretching section.

The influencing device preferably comprises a reset mechanism. This is designed to urge the locking member in the direction of the blocking position or the release position. It can happen, for example, that one stretching section has failed and needs to be repaired. If the power supply to the influencing device fails, it can, for example, push the blocking element into the blocking position, so that the drive of the stretching section can be repaired. It therefore increases security.

The return mechanism preferably has a spring pretensioned in the direction of the blocking position or the release position. This is a particularly simple and inexpensive implementation of such a reset mechanism.

Each of the aforementioned influencing devices preferably has a drive. According to the invention, this pushes the blocking element in the direction of the release position or blocking position when it is operated.

Figur 1

eine Doppelstrecke in Draufsicht, gemäß einer ersten Ausführungsform der Erfindung,

Figur 2

eine Doppelstrecke in einer perspektivischen Ansicht, gemäß einer zweiten Ausführungsform der Erfindung,

Figur 3

eine Doppelstrecke in einer perspektivischen Ansicht, gemäß einer dritten Ausführungsform der Erfindung,

Figur 4

eine Doppelstrecke gemäß einer vierten Ausführungsform der Erfindung, in drei Ansichten,

Figur 5

eine Doppelstrecke in Draufsicht, gemäß einer fünften Ausführungsform der Erfindung,

Figur 6

eine Doppelstrecke in Draufsicht, gemäß einer sechsten Ausführungsform der Erfindung,

Figur 7

eine Doppelstrecke gemäß einer siebten Ausführungsform der Erfindung, in zwei Ansichten,

Figur 8

eine Doppelstrecke in Draufsicht, gemäß einer achten Ausführungsform der Erfindung,

Figur 9

eine Doppelstrecke in Draufsicht, gemäß einer neunten Ausführungsform der Erfindung,

Figur 10

eine Doppelstrecke in Draufsicht, gemäß einer zehnten Ausführungsform der Erfindung,

Figur 11

eine Doppelstrecke gemäß einer elften Ausführungsform der Erfindung, in zwei Ansichten,

Figur 12

das in Figur 1 obere Streckwerk in größerem Detail und in verschiedenen Ansichten,

Figur 13

den Luftabzugsmechanismus des Streckwerks von Figur 12 in verschiedenen Ansichten,

Figur 14

den Umschaltabschnitt von Figur 13 in größerem Detail und in verschiedenen Ansichten und

Figur 15

die zu Figur 12 analoge Box des anderen, in Figur 1 unteren Streckwerks in verschiedenen Ansichten.

Figur 1 zeigt eine Streckvorrichtung 1 in Draufsicht, gemäß einer ersten Ausführungsform der Erfindung, die als Doppelstrecke ausgebildet ist.Further features and advantages of the invention emerge from the following description of preferred embodiments. Show it:

Figure 1

a double line in plan view, according to a first embodiment of the invention,

Figure 2

a double line in a perspective view, according to a second embodiment of the invention,

Figure 3

a double line in a perspective view, according to a third embodiment of the invention,

Figure 4

a double line according to a fourth embodiment of the invention, in three views,

Figure 5

a double line in plan view, according to a fifth embodiment of the invention,

Figure 6

a double line in plan view, according to a sixth embodiment of the invention,

Figure 7

a double line according to a seventh embodiment of the invention, in two views,

Figure 8

a double line in plan view, according to an eighth embodiment of the invention,

Figure 9

a double line in plan view, according to a ninth embodiment of the invention,

Figure 10

a double track in plan view, according to a tenth embodiment of the invention,

Figure 11

a double line according to an eleventh embodiment of the invention, in two views,

Figure 12

this in Figure 1 upper drafting system in greater detail and in different views,

Figure 13

the air extraction mechanism of the drafting system from Figure 12 in different views,

Figure 14

the toggle section of Figure 13 in greater detail and in different views and

Figure 15

the to Figure 12 analog box of the other, in Figure 1 lower drafting system in different views.

Figure 1 shows a stretching device 1 in plan view, according to a first embodiment of the invention, which is designed as a double stretch.

The double draw frame 1 comprises two draw frame units 2 which are arranged above a respective can changer 3.

The drafting devices 2 are designed in a conventional manner, that is to say they have drafting rollers and a corresponding sensor system for the sliver thickness. In addition, each drafting system 2 has its own, invisible drive. The drive and stretching rollers are preferably arranged under a respective housing cover 14.

Each can changer 3 is designed, for example, as a linear changer. I. E. a respective empty can 4 is seen in the longitudinal extension of the double section 1 according to Figure 1 that is, horizontally, laterally inserted into the respective can changer 3 from an outside thereof. This is in Figure 1 indicated by the vertical block arrows.

A jug 5 to be filled is in the in Figure 1 shown state already under a corresponding, non-visible output section of the respective can changer 3. The output section is used to deposit the sliver material processed by the respective drafting device 2 in the associated can 5 and fill it with it.

If the respective can 5 is full, it is preferably automatically conveyed outward from the respective can changer 3 in the direction of the longitudinal extension of the stretching device 1, as indicated by the horizontally running block arrows pointing to the right.

The drafting devices 2 are separated from one another by means of an intermediate section 7, for example. The intermediate section 7 extends along the longitudinal extension of the drafting devices 2 or the can changer 3 arranged below. In order to be able to operate both drafting devices 2 manually from the intermediate section 7, they are preferably mirror images of one another, viewed along their longitudinal extension, at least with regard to the components to be handled. The intermediate section 7 opens, for example, at both ends into a respective staircase 25. The staircase 25 is used to overcome the height difference between the intermediate section 7 and a floor (not shown here) on which the double section 1 is set up so that a person can walk on the intermediate section 7.

On the left side of the drafting devices 2 there is a gate arrangement 8, which is designed in three rows in the example shown. It comprises a frame 9, below which three rows of four cans 11 each extending in the longitudinal direction of the adjoining drafting devices 2 are arranged.

Depending on the number of transverse rows extending transversely to the longitudinal extent of the drafting devices 2, here four transverse rows, each consisting of three cans 11, the frame 9 has a corresponding number of Pairs of arms 10, only two of which are provided with reference numerals. In each of these pairs, the two arms 10 extend from the frame 9 away from one another. Their free ends are located above an outer one of the three cans 11 of the associated transverse row.

In sections above the respective outer can 11 and also in the area of the centrally arranged can 11, each arm 10 has a deflection mechanism, for example in the form of a roller, in order to deflect the sliver removed from the associated can 11 in the direction of the drafting devices 2.

At one end of the frame 9 facing the drafting system 2 there is a sliver guide in the form of two free-standing arms extending away from one another as a guide section 12. These are preferably designed parallel to the arms 10. The guide section 12 ensures that the slivers removed from the cans 11 are fed to the respectively associated drafting device 2 in a suitable manner.

In the example shown, sliver material from the upper four and the two cans 11 on the left in the middle is fed to the upper drafting system 2, whereas the sliver material from the remaining six cans 11 is fed to the lower drafting unit 2 here.

In the example shown, the intermediate section 7 forms a passage between the two drafting units 2. This enables access to the gate arrangement 8 from the end of the drafting units 2 facing away from the gate arrangement 8.

Furthermore, an operating terminal 15 is shown, via which both drafting units 2 can be monitored and / or operated using software.

Figure 2 shows a double stretch 1 according to a second embodiment of the invention. It differs from the in Figure 1 The double draw frame 1 shown essentially by the gate arrangement 8 and the position of the control terminal 15, which is now arranged on the other of the two drawing frames 2.

The gate arrangement 8 is designed in two rows and comprises two frames 9 in the example shown. These in turn have pairs of arms 10 on the mutually facing sides for twenty cans, not shown here, which facilitate the removal of the sliver from the can in each case arranged underneath in the direction of the associated drafting system 2 are used.

At the end facing the drafting devices 2, each frame 9 in turn has a guide section 12 here in the form of two free-standing arms that extend towards one another.

The sliver material is guided over the respective arm of the guide section 12 through an intake 13 of the respective drafting device 2 in the direction of the respective rollers stretching the sliver material, which are located under a respective housing cover 14 and are therefore not visible.

A can changer 3 is located below the drafting devices 2, the cans that can be arranged are not shown. It can be seen particularly well here that the can changer 3 has an opening 16 in each case on the side and on the front in the area of these cans. In the With respect to the longitudinal extension of the drafting devices 2 and the gate arrangement 8, openings 16 arranged laterally serve to insert an empty can, whereas the openings 16 at the front serve to guide the filled cans out of the respective can changer 3.

The control terminal 15 is attached, for example, to the right drafting system 2. It is designed to be able to make adjustments to the two drafting units 2 separately from one another or together. Furthermore, the state or the respective processing process of both drafting devices 2 can be displayed on one and the same control terminal 15. For this purpose, the operating terminal 15 is coupled to a respective control that belongs to the respective drafting system 2. For this purpose, the electrical cabling is routed to the drafting devices 2 via a rod 26, which runs vertically here and to which the control terminal 15 is attached.

In the case of the right drafting device 2, this is not a major problem in that the holding rod 26 is attached to its upper cover 27.

In order to also couple the left drafting system 2 to the control terminal 15, the intermediate section 7 is preferably used.

As can be seen, the intermediate section 7 is designed in the manner of a pedestal. I. E. on its underside it has a cavity in which the necessary cabling to the left drafting device 2 is advantageously laid. At a front end, the platform section 7 has a staircase 25 in the form of an intermediate step, which enables a person to move comfortably past the drafting devices 2, for example to the gate arrangement 8 or even just to the control terminal 15.

Figure 3 shows a double stretch 1 according to a third embodiment of the invention. This differs from the in Figure 2 shown therein that the gate arrangement 8 is again designed differently.

As can be seen, the gate arrangement 8 comprises two frames 9 which are arranged next to one another at a distance from one another and which are arranged extending in the direction of the longitudinal extension of a respective drafting device 2. The frames 9 are exemplarily analogous to the gate arrangement 8 according to FIG Figure 1 educated. I. E. each frame 9 has free-standing arms 10 on its sides facing and facing away from the respective other frame 9, which are used to remove the sliver material from the can (not shown here) arranged below it.

At their ends facing the respective drafting system 2, both frames 9 thus also each have a guide section 12 in the form of two free-standing arms that extend from one another.

Since the rest of the structure of the double path 1 is the same, its explicit description is dispensed with.

Figure 4 shows a double stretch 1 according to a fourth embodiment of the invention and in three views, once in perspective ( Figure 4a ) and twice as modified plan views ( Figure 4b and Figure 4c ).

The frame 9 of the gate arrangement 8 is constructed in principle like the right or left frame 9 according to FIG Figure 3 . However, eight cans 11 can be arranged here in each longitudinal row by way of example. However, contrary to the third embodiment, the two lateral arms of the guide section 12 open of the invention in a separate drafting system 2 of the double draw frame 1.

Each drafting system 2 has drafting rollers in a known manner. These, including the associated drive, are each arranged by way of example under an associated cover 27 with a housing cover 14.

The can changers 3, which are located below the respective stretching roller arrangement, are designed in the example shown to fill the right and left can arranged here. I. E. Both cans can represent an empty can 4, a can 5 to be filled or a full can 6. So if the left or right jug is filled (jug 5), the other jug is an empty jug 4 or a full jug 6; or the associated can storage space is empty.

The can changer 3 is preferably designed so that its non-visible turntable, via which the stretched and evened sliver is filled into the respective can 5, can change its position from one can position to the other. In the example shown, the left front can is full (reference number 6), and the right front can (reference number 4) is empty, but is currently not filled.

Furthermore, a connecting section 7 is again located between the two drafting devices 2.

The control terminal 15 is at in Figure 4a rear of the two drafting devices 2 arranged or formed.

Figure 4b differs from the representation in Figure 4a in that fiber tape material 17 is also shown here.

It can be clearly seen how the slivers led out of the respective longitudinal rows of cans are fed in the direction of the respective drafting system 2, specifically in the direction of a respective intake 13. Each intake 13 is set up to bundle the respectively fed sliver material and the one under the corresponding housing cover 14 located stretching rollers.

It can also be seen that the individual slivers of the respective longitudinal row of eight cans 11, which form the sliver material 17 and are indicated by dash-dotted lines, are aligned parallel to one another via the arms 10 and are fed in this constellation to the respective free-standing arm of the guide section 12.

In addition, one of the two drawers 13, or even both, can be set up to detect the sliver thickness and thus to trigger the drafting devices 2 in order to be able to produce the sliver even more uniformly and in the desired sliver thickness.

Figure 4c also shows a top view of the double draw frame 1, without drafting devices 2 in the area of the can changer 3. That is, the interior of the can changer 3 is visible.

This view serves to illustrate the arrangement of the cans 4, 5, 6 in relation to the respective can changer 3.

Figure 5 shows a double draw frame 1 according to a fifth embodiment of the invention in plan view and also with can changers 3 open.

The gate arrangement 8 is similar to that in FIG Figure 1 . Only the 1½ longitudinal rows of cans 11 assigned to the respective drafting device 2 are arranged somewhat offset from one another transversely to the longitudinal extension of the drafting devices 2. The fiber sliver, not shown here, can thus be fed preferably symmetrically from the cans 11 via the corresponding part of the guide section 12 with respect to the associated drafting system 2, without having to provide an extra deflection.

Figure 6 shows a double track 1 according to a sixth embodiment of the invention in plan view. The gate arrangement 8 is, for example, identical to that in FIG Figure 1 shown.

Figure 7 shows a double stretch 1 according to a seventh embodiment of the invention, in two views. These two views are similar to the first two views of the fourth embodiment.

In contrast to the previous embodiments, there is no intermediate section 7 between the two drafting units 2. Rather, a platform section 18 is located at least on the drafting unit 2 on which the control terminal 15 is arranged. In order to be able to clean both drafting units 2, for example, is preferably located a second platform 18 also on the outside of the rear drafting device 2, which faces rearward in FIG. 7a.

The platforms 18 extend essentially over approximately half the length of the respective drafting system 2 or the can changer 3 arranged below, specifically in the area of a respective recess 24 formed on the associated drafting system. The platforms 18 open at their ends facing the gate arrangement 8 each in a stair-like staircase 25.

As can be seen, each can changer 3 is designed in such a way that there is space for three cans next to one another in a direction transverse to the longitudinal extension of the drafting devices 2. In order to equip the can changers 3, it is provided, for example, that empty cans 4, viewed in the longitudinal direction of the drafting devices 2, are arranged centrally with respect to the arrangement of the two can changers 3. If the cans arranged on the side are filled (for example the can 6 at the rear here), they can, for example, be automatically pushed out, preferably automatically, in the longitudinal direction of the drafting devices 2 away from the gate arrangement 8. The next empty can 4 arranged between cans 5, 6 is then preferably automatically moved to the position at which the ejected, full can 6 was arranged. The next empty can 4, which according to FIG Figure 7a is arranged outside the drafting devices 2, move into the position in which the can 4 on the left is located here.

Since the platforms 18 do not extend over the entire length of the respective drafting system 2, there is corresponding space for these cans.

Figure 7b Fig. 13 shows a plan view of this embodiment.

Here is the in Figure 7a The rear side of the upper drafting device 2, which is not visible here, can be seen. Furthermore, the sliver material 17 is shown, which is guided via drawers 13 of the drafting devices 2 in the direction of the respective drafting rollers which are arranged below the housing cover 14. The "kink" that occurs when the respective sliver is deflected is achieved by means of fiber sliver guides (not shown).

Figure 8 shows a double track 1 according to an eighth embodiment of the invention in plan view. This embodiment is similar to the fourth embodiment of the invention.

The difference is that only one can changer 3 is used, which is able to move cans 4, 5, 6 exemplarily clockwise by means of a rotary part 28 and attached, exemplary projection-like drivers 19, so that in one formed here below Guide track 22 or empty cans 4 arranged merely on the surface can be conveyed into the active or filling areas of the can changer 3 and full cans 6 can be conveyed into the area of the upper guide track 22 or surface out of this.

Figure 9 shows a double track 1 according to a ninth embodiment of the invention. This embodiment is a combination of the gate arrangement 8 of FIG Figure 5 with the arrangement of drafting units 2 and can changer 3 of Figure 8 .

Figure 10 shows a double track 1 according to a tenth embodiment of the invention. This embodiment is a combination of the gate arrangement 8 of FIG Figure 6 with the arrangement of drafting units 2 and can changer 3 of Figure 8

Figure 11 shows a double track 1 according to an eleventh embodiment of the invention, in two views. These two views are similar to those of the fourth embodiment. The gate arrangement 8 corresponds, for example, to that in FIG Figure 3 shown third embodiment of the invention.

As can be seen, other can changers 3 are arranged or formed here. The can changers 3 assigned to the drafting devices 2 each have two guide tracks 22, which are exemplarily arranged to run parallel to one another. Both guide tracks 22 open at one end into the active area of the respective can changer 3 and at the other end into a respective ramp 21, which creates a height compensation of the respective guide tracks 22 with the floor, not shown further.

In the example shown, only three empty cans 4 are arranged in the respective feed guide track 22. When they are moved into the effective area of the respective can changer 3, i. H. moved beneath the associated housing cover 14 in the direction of the filling position due to a run-on bevel 20 which is formed on the respective pedestal 18.

If a now full can 6 is already located below the respective housing cover 14, it is urged in the direction of the respective other guide track 22 by means of a respective run-on bevel 23 formed on an intermediate section 7. This enables the cans to be moved around.

Furthermore, instead of the gate arrangement 8, a guide section 12 is formed on the drafting devices 2. I. E. the guide section 12 is absent from the gate arrangement 8.

In addition, both the intermediate section 7 and the side platforms 18 are preferably each formed with two or one staircase 25. In this way, the person concerned can choose how to approach the work on double line 1. In this way, several people can also work comfortably on both drafting units 2, for example.

Figure 12 shows an example in Figure 1 upper drafting system 2 in greater detail and in different views.

Figure 12a shows this drafting system 2 from one of the gate arrangements 8, not shown here, on which the intake 13 is located. Furthermore, the housing cover 14 is shown, under which the stretched section 29, which can be seen in a hint, is located. The housing cover 14 is attached pivotably to a frame 30. The frame 30 here has six feet, not designated, which preferably carry the entire drafting system 2. On the side facing the gate arrangement 8, the drafting device 2 has a box-like or box-like extension 31. This box 31 comprises four circumferential outer walls, one of which is provided with the reference numeral 33. The front end wall pointing in the direction of the gate arrangement 8 is not shown in order to allow a view into the interior of the box 31. A vertically extending intermediate wall 32 extending transversely to the longitudinal extent of the drafting system 2 is inserted inside. This separates the interior of the box 31 into a front sub-space pointing in the direction of the gate arrangement 8, which is used, for example, to accommodate control-technical components, and a rear part, which is not visible here.

From an outer side of the wall 33 on the right here, an air guide tube 37 protrudes, which will be explained in more detail later.

Figure 12b shows the drafting system 2 in a cutout and without the left side wall of the box 31. Here, the said rear part of the interior can be seen from the left side. This is enclosed as a cavity by the box 31 and the partition 32. An air guide tube 39 is located in this part.

Figure 12c shows a similar section, only this time without a partition 32. D. h. here the structure of said cavity can be seen.

As can be seen, the air guide tube 39 begins at the upper left corner of the cavity and initially runs vertically downwards towards the floor and then bends obliquely towards the wall 33. At its lower end, an air guiding part 36 connects here in the form of a tube open in the direction of the intermediate wall 32 (not shown). It first extends the air guide tube 39 and then preferably bends horizontally on an underside of the box 31 in the direction of the right wall 33. At its end facing the right wall 33, the air guiding part 36 opens into the wall 33, which has an opening 34 at this point. The air guide tube 37 adjoins the aforementioned outside of this wall 33 facing away from the air guide part 36.

Arranged above the air guide part 36 is another air guide part 35, which is likewise open, for example, in the direction of the intermediate wall 32. In terms of flow, it connects three openings 34 formed on the same right wall 33, in terms of flow, with an opening in the air guide part 35, which can be seen hinted at, and an opening 63 in the rear wall 61 of the box 31 facing the indentation 13, which is in alignment and is not visible here.

In the example shown, the intermediate wall 32 closes off both air guide parts 35, 36 in terms of flow on their open sides. Thus, two air lines are "laid" through the box 31.

Furthermore, in Figure 12 an air guide tube 38 is shown, which connects the stretching section 29 in terms of flow to the upper end of the air guide tube 39 facing away from the air guide part 36 via a switchover section 40, which will be explained in more detail later.

Figure 13 shows only the parts of the drafting system 2 relevant in terms of air flow. These parts form, as explained in more detail below, an air extraction mechanism.

Figure 13a shows the air guide parts 35 and 36. On a side of the air guide part 35 facing the indentation 13, which is not shown, the aforementioned opening, not designated, is formed. A fan 43 is arranged in or on this. On the outside of the air guide part 35 pointing in the direction of the intake 13, there is a pipe 42 which, in terms of flow, opens into the stretched section 29, which is likewise not shown here. The fan 43 is operated in such a way that it presses air out of the air guiding part 35 in the direction of the pipe 42. I. E. Via the aforementioned three openings 34, air is sucked in from the outside in relation to the box 31 via the arrangement intermediate wall 32 - air guide part 35 and is pressed into the stretching section 29 via the tube 42.

On a left-hand side of the stretching section 29 (not shown), the air guide tube 38 connects, which in the example shown is constructed in several parts. Starting from the stretching section 29, this kinks in the direction of the box 31 (not shown), specifically in the direction of the aforementioned upper left corner of the facing wall 61 of the box 31. The tube 38 opens into the switchover section 40 at its end facing the box 31. This in turn opens into the upper end of the air guide tube 39 at the other end. In normal stretching operation, air, which is pressed into the stretching section 29 by the fan 43, is conveyed with the foreign substances taken up in the stretching section 29 from the fiber material 17 to be stretched, not shown, via the pipe 38, the switching section 40, the air guide tube 39, the arrangement of the partition 32 - air guide part 36 and the air guide tube 37 and thus removed from the drafting system 2. As will be explained in more detail later, the air guide tube 37 opens into the other drafting system 2 of the double draw frame 1, not shown here.

Figure 13b shows the arrangement of Figure 13a from the part of the stretching section 29, not shown, in the direction of the box 31, which is also not shown. It can be seen that there is an additional air extraction section. This comprises two inlet funnels 41, each of which opens into a hose 45 on its underside. The two hoses 45 thus open at the other end into the air duct 38. The inlet funnels 41 are part of the intake 13, which is otherwise not shown in detail. The air extracted via the intake funnel 41 serves the purpose of removing foreign matter occurring in the intake 13 so that it does not reach the stretching section 29 at all reach first. A kind of pre-cleaning thus takes place before the sliver material 17 is stretched and evened out.

In terms of flow, the inlet funnels 41 are not connected to the fan 43, which is not visible here due to the pipe 42, but are arranged parallel to it.

If the respective drafting system 2 has to be shut down for maintenance work, for example, the air suction would have to be switched off. But since both drafting units 2 of the double section 1 flow together with one another are connected, switching off the associated fan 43 would not do much. The negative pressure in the air guide tube 37 would continue to lead to an air flow through the stretching section 29 to be shut down, so that maintenance or the like is hardly or not at all possible. The switchover section 40 is provided for this purpose.

Figure 13c shows the arrangement of pipe 38, switchover section 40 and air guide pipe 39 from one facing the floor, according to FIG Figure 13a Underside of the switching section 40 forth.

As can be seen, the switchover section 40 is open on its underside pointing in the direction of the floor and preferably has a grid 44.

Figure 14 FIG. 10 shows the switching section 40 of FIG Figure 13 in greater detail and in different views, twice from the connection side to the pipe 38 (not shown) ( Figure 14a and Figure 14b ) and once from the side facing the indentation 13, which is also not shown ( Figure 14c ).

The switching section 40 is provided with a frame 46. The frame 46 is designed in such a way that it is only open in the direction of the pipe 38, air guide part 39 and grille 44. A flap 47 is located on the side of the grille 44 which faces the interior space enclosed by the frame 46.

Figure 14b shows the switching section 40 in a similar perspective. Only the front wall of the frame 46 is missing here.

The flap 47 is on its in Figure 14a and Figure 14b forward facing, the tube 38 not shown facing open side by means a shaft 49 pivotally mounted. The shaft 49 penetrates the aforementioned in a fluidically sealed manner Figure 14b wall, not shown, and is rotationally connected to a lever 51 at its end facing away from the flap 47. I. E. a rotation of the shaft 49 causes the lever 51 to pivot or vice versa. This is achieved in that said end of the shaft 49 is in non-positive and / or positive engagement with the lever 51. In the simplest case, this is achieved in that the end of the shaft 49 has a non-circular outer contour, as seen in the longitudinal direction of the shaft 49. The lever 51 accordingly has, at its end facing the shaft 49, an inner contour that is preferably complementary to the outer contour of the shaft. Additionally or alternatively, the lever 51 is fixed in a rotationally fixed manner on the shaft 49 by means of a nut 50 screwed onto the shaft 49.

The end of the lever 51 remote from the shaft 49 is pivotally coupled to one end of a pneumatic cylinder 52.

At its end facing away from the lever 51, the cylinder 52 is pivotably mounted on a fastening 54. In the example shown, the fastening 54 comprises a fastening seat which is attached to the upper part of the frame 46 by means of screws 55 or is also integrally formed.

The cylinder 52 has two compressed air connections 53. If compressed air is introduced into one of these connections, a piston mounted displaceably in the cylinder is moved accordingly. In the example shown, the piston is pivotably attached to the lever 51 with its free end. If the piston is drawn into the rest of the cylinder 52, the shaft 49 is accordingly rotated clockwise. This causes the flap 47 to pivot away from the grille 44 with its side facing away from the shaft 49. In this way, the grid outlet of the switchover section 40 is fluidically connected to the air guide part 39.

The flap 47 preferably has a contact section 48 on the side facing away from the shaft 49. This is plate-like and bends away from the rest of the flap in the direction of the grille 44. If the flap 47 is pivoted, this takes place until the contact section 48 rests against the inside of the upper frame part here, which runs parallel to the grille 44, for example. Since the flap 47 is also on the in Figure 14a rests on the right and left sides of the frame 46, in this state it closes the flow passage from the pipe 40 to the air guide part 39. As a result, no more air can be transported away from the associated stretching section 29, whereby the aforementioned maintenance work can be carried out. It is therefore not necessary to switch off the aforementioned take-off device, and the other drafting system 2 can continue to work.

Since air can furthermore be transported from the grid 44 through the switchover section 40 to the other drafting device 2, nothing or hardly anything changes in the pressure conditions in the entire air extraction mechanism. As a result, hardly anything changes in the operation of the other, not shut down drafting system 2. This can be further improved by arranging an additional fan in the area of the grille 44. When the flap 47 is swung out, this is controlled in such a way that exactly as much air is conveyed in the direction of the adjoining air guide tube 39 as is the case with the one in FIG Figure 14 shown, not pivoted flap 47 would take place.

Figure 15 shows the to Figure 12 analog box 31 of the other, in Figure 1 lower drafting system 2 of the double section 1 in different views The box 31 of the second drafting system 2, not shown here, is essentially, as seen in the longitudinal direction of the drafting system 2, a mirror image of FIG Figure 12 Box 31 shown is formed. I. E. the wall 33 is arranged here on the left. The box 31 comprises an air guide part 56. This is preferably designed analogously to the air guide part 35. Only the opening for a fan is missing here. This is due to the fact that the air guide part 56 points with its open side in the direction of the rear wall 61 and is attached there in a sealing manner.

Here, too, there is now an opening at the top right to a switchover section 40, not shown, which has the same function as the switchover section 40 of the other drafting system 20. However, the switchover section 40 does not open into an air guide tube 39 but a frame section 60 formed of two frame walls 60a, 60b, which enclose an angle of 90 °, for example, and are attached or formed on their edges facing away from one another on the inner sides of the box 31 in a fluidically sealing manner. The frame section 60 is thus designed to be open on the switchover section 40 and on the side opposite thereto. Its extension in the longitudinal direction of the drafting system 2 is shorter than a corresponding (depth) inside dimension of the box 31 in this direction. Air coming from the associated switchover section 40 is thus sucked into an intermediate space 62 of the box 31 (cf. Figure 15b ).

The wall 33, analogous to the wall 33 of the other box 31, also includes a lower opening 34. The air guide tube 37, not shown here, opens into this from the outside of the box 31. This opening 34 opens into a frame section 59, which is designed similar to the frame section 60 is. The frame section 59 is also formed by means of two frame walls 59a, 59b, which include an angle of 90 °, for example and at their edges facing away from one another on the inner sides of the box 31 are attached or formed in a fluidically sealing manner. Furthermore, both walls 59a, 59b are also arranged on the rear wall 61 in a sealing manner. The frame section 59 is thus designed to be open only on the side facing away from the rear wall 61. Its extension in the longitudinal direction of the drafting system 2 is also shorter than the corresponding dimensions of the box 31. Air coming from the associated opening 34, that is, from the other drafting system 2, is also sucked into the space 62 of the box 31.

The space 62 of the box 31 is at the gate arrangement 8, not shown, facing, in Figure 15a the front side of the box 31 is preferably sealed in terms of flow by means of doors (not shown). In this intermediate space 62, a filter is inserted, preferably in the form of a mat, which by way of example fills the entire cross section of the intermediate space 62, seen along the longitudinal extension of the drafting system 2.

In the corner area of the interior of the box 31 between the frame sections 59, 60 and the air guide part 56, a wall part 57, which is triangular here and has an opening 58, is formed. The wall part 57 preferably extends parallel to the rear wall 61 and rests on the filter at least in the area of the opening 58.

Figure 15b shows the box 31 without circumferential walls, thus also without wall 33. It can be seen here that the frame section 60 is provided with an opening 64 via which the frame section 60 is fluidically connected to the switchover section 40. It can also be seen that a fan housing 65, which will be explained in more detail later, is located behind the wall part 57. Apart from that, one closes the all around formed walls of the box 31 facing away from the oblique edge of the wall part 57, a wall 68 which extends in the direction of the rear wall 61 and preferably encloses an angle of 90 ° with the wall part 57.

Figure 15c shows the box 31 according to Figure 15a , only without air guiding part 56. The openings 34, 63 for the air guiding part 56 can be clearly seen here, as they are also in the case of the box 31 according to FIG Figure 12 are designed for the air guide part 35, just a mirror image of it.

Figure 15d shows the box 31 from the one facing the intake 13, that is from the one in relation to FIG Figure 15a Back of box 31. Figure 15e shows the box 31 from the same perspective, only without a rear wall 61.

Accordingly, the rear wall 61 is essentially constructed in two parts. The part of the rear wall 61 shown here has an opening in the area of the fan housing 65. This is closed by means of a flap, not shown here, belonging to the rear wall 61.

The flap is provided to allow a person access to a space 66 of the box 31. The intermediate space 66 is enclosed by the left front side wall of the box 31, a bottom wall 69 of the box 31, the wall 68, the wall part 57 and the rear wall 61.

The fan housing 65 is designed, for example, like a worm housing and is part of a radial fan. This is in flow connection with the opening 58 on the inlet side and has an opening 70 on the outlet side into the space 66. The bottom wall 69 has an opening 67 which is arranged in such a way that that from the radial fan, ie Via the opening 70 of which air escaping from the box 31 can be discharged to the outside.

The air guide parts 35, 56 and the boxes 31 can be composed of parts of the same type, although the arrangement is realized in mirror image to one another. This keeps costs low and enables standardized parts to be used.

The invention is not restricted to the prescribed embodiments.

In the case of the presented double draw frames 1, any type of gate arrangement can be used, provided that it is set up to deliver sliver material to two draw frames 2.

Each can changer 3 can also be combined with each of the prescribed drafting devices 2.

The pedestals 18 and the intermediate section 7 can be foreseen in each embodiment or can also be omitted. If the intermediate section 7 is missing, the respective operating terminal 15 is arranged or formed on one of the two outer sides of the drafting devices 2 pointing away from one another.

The coupling of the operating terminal 15 to the drafting devices 2 or one or more control (s) controlling them does not have to be wired. It can also take place wirelessly, for example using Bluetooth.

The can changers 3 described can also be arranged separately.

The stairs 25 can be omitted in whole or in part, or they can be designed in any other way than the staircase shape described above. For example, with regard to the intermediate section 7, it is advisable to provide a ramp-like stairway at its end facing away from the gate arrangement 8. In this way, for example, a dirt container can be rolled up onto the intermediate section 7 for maintenance purposes, in order to be able to deposit material from the respective stretching section which has not been suctioned off therein.

The intermediate section 7 can also be designed in the manner of a plate or have a shape that rises in relation to the floor.

As a result, the invention offers a simple and universally applicable solution for realizing double routes which offer the greatest possible flexibility of use with the least possible space requirement.

The space requirement is reduced, in particular with regard to the width of the entire double section 1. Linear can changers can be used for cans with a diameter of 1000 mm, which benefits the efficiency. A can magazine is not absolutely necessary. With the presented double (head forward) stretchers without mechanical coupling with one another and with separate drive technology, peripheral equipment (switch cabinet, control, suction / filter box, operator terminal / display) can be used jointly by or for both stretching units 2.

Due to the drive-related separation of the two drafting units 2, the unaffected drafting unit 2 can continue to operate in the event of a fault become. This also applies to maintenance work / service if this is only to be carried out on one drafting system 2.

The distance between the two drafting units 2 can be selected to be so large that operation from the middle between the two drafting units 2 is possible.

In addition, a direct passage to the gate arrangement can be realized; the distances for the operator are reduced to a minimum.

The settings on both drafting units 2 can be made completely independently. This makes it possible to use the stretching device 1 according to the invention with different materials or, for example, as a first or second passage without any problems.

Due to the invention, the drafting system 2 with the control terminal 15 can also be used as a single-head pre-draw. This means that uneven numbers of sections can also be realized.

Instead of the cylinder, any drive which is able to pivot the flap 47 can be used. One possibility is, for example, a worm drive.

In addition, it can be provided that the drive of the flap 47 only acts in one direction. In the other direction, a preferably mechanically acting return mechanism is provided. In the in Figure 14 For example, the return mechanism can be formed by means of a leg spring, one end of which is supported on the frame 46 and the other end of which is fastened to the lever 51 or is supported on a stop arranged thereon.

It is indicated above that the flap 47 lies in a sealing manner at its edges on the associated inner sides of the frame 46. Alternatively, the flap 47 is preferably at a distance from each of these inner sides. This distance is dimensioned in such a way that air flows through it, but to a negligible extent. I. E. this is not noticeable on the route section 29 when the flap 47 is pivoted open. The result of the spacing is that foreign matter in the air does not nestle in the contact area between the flap 47 and the frame 46 and thereby could clamp the flap 47 to the frame 46 so that it could no longer be moved. The distance therefore serves the operational safety of the switchover section 40.

Instead of the pivotable flap 47, a displaceable part can also be provided. This could, for example, have two free legs which are arranged at right angles to one another. One leg extends parallel to the orientation of the flap 47 in FIG Figure 14 . The other leg extends from this leg in the direction of the grille 44. A rack and pinion drive could be provided as the drive. A motor shaft rotates and meshes with a number bar, which is attached or molded onto the other leg through a rubber lip seal, for example. A compression or tension spring can be provided here as a return mechanism.

Alternatively or additionally, a bistable design can be provided. In the case of the lever 51, for example, it can be designed in such a way that when it is pivoted it is moved past a resilient part that is curved towards it. Approximately in the middle of the movement, the part is pretensioned to the maximum and, when the lever is moved further, urges it towards the respective end position due to its relaxation.

Instead of the box 31 with a filter mat, provision can also be made for the corresponding box 31 to be provided with air guide parts. These are designed in such a way that the air from the air duct 37 and the air coming from the switch section 40 directly connected to this box 31 is discharged to the outside with respect to the box 31 to an external air suction device.

List of reference symbols

1

Double route

2

Drafting system

3

Can changer

4th

empty jug

5

jug to be filled

6th

full pot

7th

Intermediate section

8th

Gate arrangement

9

frame

10

poor

11

Jug

12th

Guide section

13th

Indent

14th

Housing cover

15th

Control terminal

16

opening

17th

Sliver material

18th

Pedestal section

19th

Carrier

20th

Approach slope

21

ramp

22nd

Guideway

23

Approach slope

24

Recess

25th

Rise

26th

pole

27

cover

28

Rotating part

29

Stretching section

30th

frame

31

box

32

Partition wall

33

wall

34

opening

35

Air control part

36

Air control part

37

Air duct

38

Air duct

39

Air duct

40

Switching section

41

Feed hopper

42

pipe

43

fan

44

Grid

45

tube

46

frame

47

flap

48

Adjoining section

49

wave

50

mother

51

lever

52

pneumatic cylinder

53

Compressed air connection

54

Attachment

55

screw

56

Air control part

57

Wall part

58

opening

59

Frame section

59a, 59b

wall

60

Frame section

60a, 60b

wall

61

Back wall

62

Space

63

opening

64

opening

65

Fan housing

66

Space

67

opening

68

Wall

69

Bottom wall

70

opening

Claims (18)

1. A draw device (1)

   • including two drafting systems (2) each with

   - an intake section (13), configured for transporting sliver (17) from outside with regard to the associated drafting system (2) in the direction of a drafting section (29) of the associated drafting system (2),

   - the drafting section (29) itself, configured for drafting and harmonizing the transported sliver (17) according to predetermined specifications,

   - an output section (3) configured for delivering to the outside the drafted and harmonized sliver out of the associated drafting system (2), as well as

   - a drive device, configured for driving the sections (3, 13) of the associated drafting system (2),

   • wherein both drive devices are configured for operating independently of each other, and

   • the draw device (1) further comprises

   - an operator unit (15), adapted for allowing a user to configure and/or to control the operation of the two drafting systems (2) independently of each other, and/or

   - an air extraction device (36, 37, 39), which

   • is fluidically coupled to the drafting sections (29) such that the air extraction device (36, 37, 39) is able to suction air from the drafting sections (29) in the direction air extraction device (36, 37, 39), and

   • is configured for interrupting the air suctioning from a respective one of the two drafting sections (29).
2. The device (1) according to claim 1, wherein each output section (3) includes a can changer (3).
3. The device (1) according to claim 2, wherein the can changers (3)

   • are formed as linear changers, and

   • extend parallel to the longitudinal extension of the respective associated drafting system (2).
4. The device (1) according to any of the preceding claims, further including a connecting section (7), which

   • seen in longitudinal extension of the two drafting systems (2), is disposed between the two drafting systems (2) so that the two drafting systems (2) are disposed spaced apart from each other at least in the area of the connecting section (7), and

   • extends in longitudinal direction of the two drafting systems (2).
5. The device (1) according to claim 4, wherein the connecting section (7) is attached to at least one of the two drafting systems (2).
6. The device (1) according to claim 4 or 5, wherein the connecting section (7) forms a passage between the two drafting systems (2).
7. The device (1) according to any of the claims 4 to 6, wherein, seen in longitudinal direction of the drafting systems (2), the operator unit (15) is disposed at an end of the connecting section (7).
8. The device (1) according to any of the claims 4 to 7, wherein the connecting section (7) is provided with a platform section, which has a predetermined height with regard to a floor, on which the draw device (1) is disposed.
9. The device (1) according to claim 8, wherein the connecting section (7) is further provided with at least one ramp-like or stair-like access section (25), which

   • is formed to ascend from the free end of the connecting section (7) along the longitudinal extension of the two drafting systems (2) in the direction platform section, and

   • is attached to the platform section or formed integrally therewith.
10. The device (1) according to any of the preceding claims, wherein the operator unit (15) is mounted to any of the two drafting systems (2).
11. The device (1) according to any of the claims 4 to 9, wherein the operator unit (15) is mounted to the connecting section (7).
12. The device (1) according to any of the preceding claims, wherein, if the air extraction device (36, 37, 39) is present, interrupting the air suctioning is realized by providing a directing device (40) between at least one respective one of the drafting sections (29) and the air extraction device, which directing device (40) is configured

    • in a first operating state, for blocking an air flow connection from the at least one drafting section (29) to the air extraction device (36, 37, 39), and

    • in a second operating state, for unblocking the air flow connection from the at least one drafting section (29) to the air extraction device (36, 37, 39).
13. The device (1) according to claim 12, wherein

    • the first or second operating state is caused by means of operating the directing device (40), and

    • accordingly the second or first operating state is caused by non-operating the directing device (40).
14. The device (1) according to claim 12, wherein, when operated, the directing device is configured for causing a change from the first to the second operating state or back again.
15. The device (1) according to any of the claims 12 to 14, wherein the directing device (40) includes a shut-off element (47), which

    • in a blocking position, corresponding to the first operating state, enables air flow between an area fluidically isolated from the drafting section (29) and the air extraction device (36, 37, 39), and

    • in an unblocking position, corresponding to the second operating state, enables air flow between the at least one drafting section (29) and the air extraction device (36, 37, 39).
16. The device according to claim 15, wherein the directing device (40) comprises a reset mechanism, configured for urging the shut-off element (40) in the direction blocking position or unblocking position.
17. The device according to claim 16, wherein the reset mechanism includes a spring biased in the direction blocking position or unblocking position.
18. The device according to any of the claims 14 to 17, wherein the directing device (40) includes a drive (52), which, when operating with the shut-off element (47), urges the same in the direction unblocking position or blocking position.

Images