DE102008041120B4 - Knotting device for the simultaneous formation of two nodes - Google Patents

Abstract

Knotting device (1) for the simultaneous formation of two nodes, wherein a knotter pinion (6), a spur gear (7) and a Knoterschnabel (2.1) on a drive shaft (13) are arranged and that on a spaced therefrom output shaft (14) has a second Spur gear (7) and a second Knoterschnabel (2.2) are arranged and the two shafts (13, 14) with the Knoterschnäbeln (2) are formed simultaneously and in opposite directions movable, wherein the drive shaft (13) via the Knoterritzel (6) of a Knüpferwelle (3) via a Knüpferscheibe (4) is drivably formed and the Knoterschnäbel (2) in their shape mirrored to a median plane between the two Knoterschnäbeln (2) and two lateral Fadenandrücker (9) the Knoterschnäbeln (2) are assigned, wherein a Catcher disc (22) and a clamping segment (23) are each arranged to a thread holder (24) for clamping the threads and to form a thread reserve, which assign the Knoterschnäbeln (2) t and together as a unit between them.

Description

The The invention relates to a knotter device and a method for simultaneous formation of two nodes, as for example for large balers is used by means of two twine strands, a top and a Lower thread, on spanned, cuboid pressed bale an end node of the pressed bale and at the same time a starting knot for one to produce new bales.

such Big balers are agricultural machines in which, for example, straw, Hay, silage and renewable resources pressed into compact bales which are then with threads or twine entwined and largely in the pressed form be kept fixed. Further fields of application for generic knotting devices are garbage, Paper or waste presses.

in the The prior art known as Einfadensysteme, which get along with only one twine and form individual knots. These Systems therefore work with a thread feed and only own a knotter's beak. By pressing the crop into a length of thread When Einfadensystem are the high frictional forces between pressed bales and Threads disadvantageous and to lead often to tearing out the threads from the thread holder or to tear the threads.

Around to increase the efficiency of the machines, systems have been developed which greater pressing pressures on the pressed bale achieve what the efficiency of storage and transportation of the Pressballen increased. These systems are referred to as two-thread systems that come in different Versions with a Knoterschnabel and separate threads work. The threads are named after their position as upper thread and lower thread. The knots, the end and start nodes turn one or two knotter shaft turns in succession educated. Other two-thread systems already have two knotter beaks largely simultaneous or time-delayed formation of two nodes on.

A device of this kind is used in the DE 28 20 241 A1 described. This discloses a method for placing a cord around a bale and an apparatus for carrying out the method in which two nodes are generated in succession. The Knotervorrichtung knits with two separate knotter beaks, which have the same sense of rotation, a time-delayed end and an initial node automatically.

The execution the two Knoter as separate and independently acting elements has the consequence that also separate Knoterscheiben, which also as Knüpfer slices required, to separate Knoterantriebssystemen required are the ones you want two nodes in at least partially matching timings too socialize.

Of the Disadvantage of this device is evident in that the two knotter beaks can not be set in motion at the same time and the movement too does not end at the same time. Another disadvantage is a high constructive and thus also costs to drive the Knoter separately and to synchronize. Mechanically complex solutions always have that too Disadvantage of higher susceptibility to interference.

The successive formation of two nodes in a pair of strands during a complete cycle of operation is also shown in FIG DE 60 2005 000 693 T2 which discloses a binding mechanism for a baler.

From the DE 10 2004 055 134 A1 is also a binding device for large balers with two twine strands out. In this case, the twine wrapping a bale at two remote locations, each with a node that are formed with a time delay, connected to each other. Each node device is associated with a twine clamping device. The twine strand is firmly secured against movement during the period of the knot withdrawal.

Furthermore, from the DE 10 2007 000 678 B3 , as post-published prior art, it is known that in Knotereinrichtungen for the simultaneous formation of two nodes with two kneavers acting parallel knotter with the help of a arranged between two Knoterschnäbeln mean Fadenandrückers a thread reserve in the form of a thread triangle is formed. This thread reserve is needed in Knotereinrichtungen according to the prior art for knot formation, so that the Knoterschnäbeln even enough free thread length is available for the Knotvorgang when rewinding of the threads from the outer strands through the loop by the looping the Knoterschnäbel a high Burden on the threads means.

Indeed is with this solution the disadvantage associated with that over a loose or too tightly stretched thread triangle a defined, reliably reproducible thread layer can not be achieved with the result of occurring faulty bindings.

The invention has for its object to provide a knotter for large balers available that efficiently with two constructive and technical effort two Knot can create high reliability of binding.

The The object of the invention is achieved by a knotter device for simultaneous Forming two nodes according to claim 1 and by a method solved according to claim 13. A knotter sprocket, a spur gear and a knotter beak are on a drive shaft arranged and spaced on a drive shaft to the output shaft a second spur gear and a second knotter beak are arranged, wherein the two spur gears engaged with each other and the two waves with the Knoterschnäbeln with it are designed to be movable simultaneously and in opposite directions, wherein the Drive shaft over the knotter sprocket is drivable.

The two knotter beaks are in their form mirror image or mirror symmetry to a Center plane between the two Knoterschnäbeln running.

Farther Advantageously, two lateral Fadenandrücker adjacent to the two Knoterschnäbeln provided and assigned to this.

Of the Distance between the two knotter beaks to each other determines the type of node formed with. At a smaller distances of the waves to each other are nodes with a solid Thread end formed. At a greater distance The waves become knots with integrated thread ends formed, which is a higher Have resistance to the pulling up of the knots. According to experience in a transition area the distance depending on various other parameters both solid nodes and Loop knot formed.

To A preferred embodiment of the invention is the knotter sprocket through one on a knotter shaft arranged Knüpferscheibe driven, with the Knüpferscheibe one with the knotter sprocket corresponding teeth and a Cam track for having a transmission.

Advantageous has the knotter device according to the invention Furthermore, a thread holder, which in turn consists of a clamping segment and a catcher disk exists and over the gearbox is driven. Grip clamping segment and catcher disk into each other and thereby form the thread holder, the function has, the threads to position, to move specifically and to hold with a defined force or to clamp.

The both, the Knoterschnäbeln assigned and a unit forming catcher discs have at least a notch on, in the starting position together with the clamping segment in front forms a depression in the introduction of the rotational movement, in which the threads the upper thread and the lower thread are inserted.

In an advantageous embodiment of the invention, the catcher disc just a notch on and moves in a pivoting motion and back. She is swinging for the steps "pinching threads" and "cutting threads" and "throwing threads" first forward and after ejecting the threads back again in the starting position. Then the notch can again create new threads for the next knotting process take up.

In an alternative embodiment, the catcher disc has four such Scores and moves gradually rotating. A backward movement does not happen then.

The catch disk becomes the knotting process in an advantageous embodiment of Invention driven by the transmission, that of the cam track on the Knüpferscheibe, a lever and a coupling rod is formed. The respectively trained Transmission leads to a pivotal movement or, for example, to a quarter turn each of the two catcher discs. In an alternative embodiment, the transmission of a separate Cam on the knotter shaft, formed the lever and the coupling rod.

The Clamping segment acts as active partner in the thread holder passive and is biased by a spring mechanism. It acts in each case a coil spring as a helical compression spring on each of the clamping segments Both knot devices alike. In an advantageous Further development of the knotter device according to the invention is the tension of each spring separately adjustable, so that each knotter device can be adjusted individually.

Becomes this embodiment further developed such that the voltage of the Coil spring during the knot forming process varies in a controlled manner, this can be loose Thread end are released from the clamp at a predetermined time, so that a solid knot forms. Will the loose end of the thread but longer clamped in the thread holder, the loop is knotted and it arises a stable loop knot that does not have sharp edges and thus the threads less burdened. In addition to the distance between the two Knüpferschäbel can over the controlled spring tension the type of knot to be influenced.

With the bias of the coil spring pushes the clamping segment the threads in the Catch disk. Depending on the bias, the threads are thus there more or less clamped.

in the Area between both thread holders is still a single, passive, fixed knife for cutting the threads attached. The Training a fixed knife is of particular advantage because the cutting process is more surprising Be so particularly reliable and reproducible executed can be.

The Knoterschnäbeln assigned is a knot puller, which in duplicate for both Knoterschnäbel is provided, therefore, double acting. The knot puller serves to complete the knot after the formation of the loops. The knot puller allows a peeling of the knot formed by the Knoterschnäbeln and thus ends the binding process, before formation of the following Ballens the process of thread recovery and knot formation starts over.

A advantageous embodiment of the invention consists in the parallel Spacing of drive and output shaft. Alternatively, by a suitable gearing the drive and output shaft in one Are executed angle to each other.

One inventive method for generating two nodes is realized by that at one revolution of the knotter shaft a needle by means of a Einschwenkbewegung the lower thread to the upper thread leads and The strings on the Knoterschnäbeln positioned. At the same time the threads are placed in an opening, the by clamping segment and catcher disc is formed when the latter is in an appropriate position located. Subsequently, the catcher disc rotates in the clamping segment into, with which she constantly engages and forms a thread holder, in which the threads clamped can be. For this purpose, the rotating catcher disc engages the ones lying in the opening Threads and pulls it with the pivoting movement into the thread holder. There will be The strings clamped so that they get enough tension during the knot process without being held so tight that when pulling the threads in the Knot process tear would. The catcher disk performs thus with each Knotvorgang a pivoting movement in pendency from the cam shape on the knotter disk. In an alternative embodiment performs the catcher disk a rotating forward movement.

Parallel the knotter beaks turn to it and form the loops. Up to a quarter turn of the Knoterschnäbel become the threads of outside fed the Knoteinrichtung ago. Is the rotational movement, however significantly further, there is an inhibition of the threads and a pulling through of Outside is only possible under high load of threads. The result are thread breaks or at least damage.

Becomes the catcher disk with the clamped threads Moves on, pulls the catcher disk The strings in the area between both thread holders over a single, passive, fixed knife. The threads in this area are without Generation of a remnant piece cut through and the two thread ends, at the same time Nodes are to be formed, are separated from each other.

In order to the two thread ends are separated and clamped freely in the thread holder. The to the complete Formation of loops more necessary length of thread get the knotter beaks now from the thread holder. There the threads are still clamped, however, only so strong that they are due to the knotter beaks in the need Length still can be pulled out.

Both Loops are still in the thread holder due to the remaining thread ends clamped, unless they were pulled out during the knot process. You should now completely released from the clamping device become. This is done by turning the catcher discs so far be that the thread ends pushed out of the thread holders become.

To the rotation of the knotter beaks the formed thread loop still sits on the Knoterschnabel. The Both formed loops are assigned by means of the Knoterschnäbeln, double-acting knotter pullers subsequently deducted. The needle then swings back to the starting position.

In order to Both knots are free, the knotting process is finished and the knotting device ready to form two new nodes.

A further embodiment of the invention has an active counter cutting edge parallel to the thread holder. Also in this embodiment thread holder and active counter cutting edge are made double. In the middle between the two identically designed parts of the drive of the catcher disc is provided. This drive takes place via the coupling rod, the lever which has a cam roller at its upper end. The cam roller is engaged with a cam track which is driven by a catcher pinion via a shaft. Due to different shapes of the cam track different cycles can be achieved during the pivoting movement. The catcher pinion is in temporary engagement with the toothing of the knotter disc, which in turn is driven by the Knüpferwelle. By the gear formed from the aforementioned elements, a pivoting movement is caused, which enabled the functional movement of the catcher disc light and realized in cooperation with clamping segment and knife holding and cutting the threads. With the insertion of the active counter-blade between the catcher discs of the thread holder results in an expansion of the distance between the two knotter beaks.

Therefore this embodiment of the invention has a wheel chain. Under a wheel chain is an arrangement of gears understood that interact in the manner of a transmission. In the embodiment according to the invention they are spur gears with parallel shafts and axles. The gears are stationary engaged with each other. Forms an even number of gears Gear chain, is the direction of rotation of the first gear of the chain opposite to the Direction of rotation of the last gear, odd number is the Same direction of rotation. about the wheel chain becomes the rotary motion of the knotter shaft and the knotter disc of the drive shaft to the output shaft, where the Knoterschnäbel attached are, transferred. The Waves move in opposite directions Turning sense, because the number of gears of the wheel chain is even. The first gear wheel chain is mounted on the drive shaft, followed by two gears, the supported by axles are, the last gear is mounted on the output shaft.

The active counter cutting has notches on its circumference, which the Take up threads. The in the active counter-blade and in the catcher disks the thread holder held threads be while the pivoting movement of the active counter-blade pressed against the knife and severed in the course of the knot process.

Advantageous in the illustrated invention is in particular the constructive relatively uncomplicated design the knotter, which is capable of two knots at the same time and to form in parallel. It is exploited conceptually, that only one Knoterschnabel is driven directly and within the drive train of the first Knoterschnabels via a spur gear of the second Knoterschnabel is driven in parallel and in opposite directions rotating.

Farther advantageous is the solution without formation of a loose thread reserve. Instead, a thread reserve held in the thread holder. This can in addition to the fixation of the thread ends without additional expenditure on equipment required for knotting thread reserve be formed. Due to the spring tension on the clamping segment, the Thread tension individually for every knotter will be varied.

Farther It is advantageous that a high binding safety is achieved and that when separating the threads oddments be avoided. This increases the Safety to prevent accidents when feeding animals with the big bales, there accidents and troublesome thread remnants are avoided. Also the reliability of the binding systems is increased, as clogging and blocking by remaining pieces and thread remains can not be done.

Further Details and advantages of the invention will become apparent from the following Description of exemplary embodiments with reference to the associated Drawings. Show it:

1 : Knotter device, built into a large baler,

2 Image: Full view of knot device in perspective,

3 : Knotter device, side view,

4 Photos: Knot detail, side view in section,

5 : Knotter device without knot puller and gearbox, rear view,

6 : Knotter device with alternative drive of the catcher disk,

7 : Knotter device with alternative drive of the knotter beaks,

8th : Knotter device with counterknife in side view,

9 : Knotter device with counterknife in rear view,

10 : Knotter device with exposed counter-blade and alternative drive of the catcher disc,

11 : Knotter device with counterknife in perspective view,

12 : Detail knotter device, catcher disc and counterknife.

In 1 a knotter device of a large baler in the neckline is shown schematically. Center of the view is the knotter device 1 , which is arranged above the press channel of the large baler. The generic large balers use an upper thread 15 and a bobbin thread 16 , which the pressed material, the big bales 17 , enclose. The knotter device 1 is spatially above and in front of the finished large bale 17 arranged and knots the end knot of the ferti Pressballens 17 and at the same time the initial node of the next bale to be pressed.

A needle 8th leads the upper and lower thread 15 . 16 into the knotter device 1 and holds the parallel threads during the knot above the Knoterschnäbel 2 almost at rest.

The lateral Fadenandrücker 9 , in each case externally adjacent to the Knoterschnäbeln 2 arranged, fix the two threads 15 and 16 each during the knot-forming process. Likewise, the double thread holder fixes 24 the two threads 15 and 16 , which initially in the open in the initial position notch of the thread holder 24 are located. After further movement of the catcher disk 22 become the two threads 15 and 16 securely fixed in the labyrinthine thread holder 24 , formed by catcher disk 22 and clamping segment 23 ,

The clamping segment 23 as the active partner of the catcher disc 22 in the thread holder 24 works passively and is biased by a spring mechanism. This act in the illustrated embodiment of the invention knotter device 1 two coil springs 25 as helical compression springs directly on each clamping segment 23 both thread holder 24 , The spring mechanism is designed so that the spring force and thus the bias can be adjusted. With this bias the clamping segment pushes 23 The strings 15 . 16 into the catcher disk 22 , Depending on the bias, the threads are thus more or less clamped.

The drive of the knotter device 1 takes place via the rotation of the knotter shaft 3 on which the Knüpferscheibe 4 and the cam 11 sits and which the rotary movement over further elements on the Knoterschnäbel 2 to form the node transmits.

2 shows a complete view of the knotting device 1 in perspective with the knot puller 12 , This is to better visibility of the other elements in the 3 . 4 . 5 . 6 and 10 omitted. In the position shown is the Knotenabzieher 12 pivoted back. After the loop is formed and on the Knoterschnäbeln 2 lies, with the tongues 19 holding the loop, pivots the mounted on a shaft, double-acting knotter puller 12 forward, the loop pulls from both Knoterschnäbeln 2 and thus completes the knot formation process.

The gearbox for generating the movement of the catcher disk 22 the thread holder 24 gets out of the cam 11 , the cam roller 26 , the lever 21 and the coupling rod 27 educated.

3 shows the knotter device 1 in side view. The details of the lower node formation area are in 4 shown enlarged. 3 leaves the function of the cam 11 recognize that with the knotter shaft 3 connected and the gear moves. This is done via the on the knotter frame 20 stored lever 21 whose upper end is a cam roller 26 that with the cam 11 engaged without being forced. The lower end has a coupling rod 27 on that the pivotal movement of the catcher disc 22 causes.

The gearbox is over the cam roller 26 on the lever 21 with the cam 11 connected.

In 4 is the lower part of the knotter device 1 enlarged and shown in side view in section. In particular, the site of action of catcher disc 22 and clamping element 23 the thread holder 24 also shown is the fixed, adjustable knife 10 , the coil spring 25 as well as the gearbox that the catcher disc 22 over the coupling rod 27 drives, from a cam 11 is moved and each pivotal movement of the catcher disc 22 causes.

The catcher discs 22 have notches, which in the starting position before the initiation of the rotary movement together with the clamping device 23 form a notch-like opening into which the threads 15 . 16 be inserted to securely into the thread holder 24 to be drawn.

The catcher disk 22 is driven for knotting by a gear which generates the pivoting movement and the movement of a cam 11 over the cam roller 26 and the lever 21 as well as the coupling rod 27 on the catcher disk 22 transfers. As a result, this working movement can be realized without additional drive device and the knotter device 1 technically simplified despite more complex functionality.

The clamping segment 23 as the active partner of the catcher disc 22 in the thread holder 24 acts passive and is biased by a spring mechanism. In this case, the knotter device according to the invention acts in an advantageous development 1 one coil spring each 25 as a helical compression spring against the clamping segment of the respective Knotereinrichtungen 1 ,

With this bias the clamping segment pushes 23 The strings 15 . 16 in the thread holder 24 , Depending on the bias, the threads are 15 . 16 thus more or less clamped.

Will the catcher disc 22 with the clamped threads 15 . 16 moved on, she pulls the Threads in the area between both thread holders 24 over a single, passive, fixed knife 10 , This will be the threads 15 . 16 cut through in this area and the two ends of the yarn, at which nodes are to be formed simultaneously, separated from each other.

The individual elements of the knotter device 1 can be driven individually or together by motors as an alternative to the illustrated drive form. For this purpose, electric, hydraulic or pneumatic motors can be used.

In 5 is the knotting device 1 in rear view without knot puller 12 shown. The knotter device 1 consists essentially of two waves 13 . 14 with the associated Knoterschnäbeln 2 ,

The first shaft is the drive shaft 13 , which with a Knotritzel 6 a spur gear 7 and a knotter's beak 2.1 is designed as a drive train.

The lower shaft ends of the drive shaft 13 and the output shaft, not shown 14 are from the two mirror-image shaped Knoterschnäbeln 2 formed, which thus also rotate in opposite directions.

In the illustrated embodiment, the output shaft 14 parallel to the drive shaft 13 arranged. The drive and the output shaft 13 . 14 are in operative connection via the spur gears 7 , The spur gear 7 of the drive train 13 stands with the spur gear 7 the output train 14 engages and transmits the rotational movement thereby on the output line 14 and its knotter's beak 2.2 ,

In 6 is an alternative embodiment of the drive of the catcher disc 22 shown. Shown is the knotter device 1 , cut longitudinally and leaves the function of the Knüpferscheibe 4 recognize that with the knotter shaft 3 is connected and the transmission to drive the catcher disc 22 over the on the Knoterrahmen 20 stored lever 21 and the attached cam roller 26 emotional. The cam roller 26 stands with the curved path on the Knüpferscheibe 4 engaged. The lower end of the lever 21 has the coupling rod 27 on that the pivotal movement of the catcher disc 22 which causes the knotter frame 20 is mounted rotatably.

The motion transmission within the knotter device 1 can thus be summarized as follows. About the knotter shaft 3 becomes the knotter disc 4 moves, which in a peripheral area a toothing 5 having. The gearing 5 corresponds to the hidden in the diagram Knotritzel 6 and drive this. The over the Knotritzel 6 driven, also not visible in the figure drive shaft 13 moves the associated spur gear 7 , With the spur gear 7 the drive shaft 13 is the spur gear 7 the output shaft 14 engaged so that upon movement of the drive shaft 13 simultaneously and in opposite directions the output shaft 14 is moved.

The movement of the catcher disk 22 the thread holder 24 comes with the movement of the knotter shaft 3 synchronized via a curved path on the Knüpferscheibe 4 and a gear moves. The lever 21 the gearbox is rotatable on the knotter frame 20 stored.

In the illustrated embodiment of the invention, the drive shaft 13 and the output shaft 14 spaced parallel to each other. Between them acts not shown thread holder 24 and pinches the threads lying together, the upper thread 15 and bobbin thread 16 , so firmly that the threads still through the unrepresented rotating Knoterschnäbel 2 pulled out and can be effective as a thread reserve when the thread tension in the looping of Knoterschnäbel 2 is correspondingly high. This is according to the invention after a rotation of about 270 ° of Knoterschnäbel 2 the case.

By the further movement of the catcher disc 22 become the threads 15 . 16 through the thread holder 24 and against the knife 10 pressed, whereby it comes to the cut and the thread ends are already present separately before the formation of the knot and thereby still of the two thread holders 24 being held.

The 7 describes a further advantageous embodiment of the knotter device. Here is a wheel chain 28 shown. The wheel chain 28 is from the drive shaft 13 driven, she stands with the spur wheels 7 engaged and drives the two knotter beaks 2 at. By the inventive linkage of the wheel chain 28 is the sense of rotation of Knoterschnäbel 2 in opposite directions.

The drive shaft 13 is driven by the Knüpferscheibe 4 , the interlocking teeth 5 and with this gearing 5 engaged knotter sprocket 6 , The Knüpferscheibe 4 with the teeth 5 also drives the catcher pinion 31 that's about a shaft with the cam track 30 connected is. The knotter frame 20 holds the illustrated components and serves the power transmission.

At the knotter frame 20 the knotter device 1 are the mirror-inverted-shaped normally open contacts 18 for controlling the movement of the tongues 19 the knotter beak 2 arranged on these provided cam.

The 8th shows the knotter device 1 in the side view. The cam track 30 is engaged with the cam roller 26 shown. This functional unit leads to the programmed movement of the lever 21 and with this articulated coupling rod 27 which the catcher disk 22 drives. The one due to the shape of the cam track 30 given movement sequence causes the catcher disc 22 the threads in the clamping segment 23 clamps and in a later step against the knife 10 press that makes the cut.

In the 8th is also the Knoterschnabel 2.2 to recognize the over the wheel chain 28 and the spur gear 7 is driven. The tongue 19 of the knotter beak 2 is shown in open position.

9 shows the knotter device 1 in the rear view. The knotter shaft 3 is in positive connection with the Knüpferscheibe 4 their interlocking 5 engaged with the catcher pinion 31 stands. This is about a shaft with the cam track 30 connected to the cam roller 26 moved on a given curved path. The cam roller 26 is in turn with the lever 21 connected. The joint becomes a thread holder via a joint 24 transfer. At this time, the gear formed by the aforementioned elements moves the catcher disk 22 the thread holder 24 , which thereby performs a functionally advantageous pivotal movement. The pivoting movement of the catcher disk 22 is carried out such that the threads 15 . 16 for looping on the Knoterschnäbeln 2 in the thread holder 24 be clamped.

10 shows a side view of the knotter device 1 , In the upper area are the cam track 30 and the cam roller engaging therewith 26 shown. The shape of the cam track 30 determines the movement cycle of the cam roller 26 and with it the movement of the catcher disk 22 that over the lever 21 and the coupling rod 27 is moved. In the upper part of the figure are still the Knüpferscheibe 4 and the knotter shaft 3 recognizable with the knotter frame 20 are movably connected.

The catcher disk 22 and the active counterknife 29 are formed as a unit. The active counter-blade 29 is motion coupled with the catcher disc. Both perform in the embodiment of the same movement, because the catcher disc 22 and the active counterknife 29 are positively connected with each other. The active counter-blade 29 thus performs the same pivotal movement and thereby pushes the threads 15 . 16 on the knife 10 causing the threads 15 . 16 get cut. After the cut, the thread ends are still in the thread holder 24 clamped, resulting from the interaction of clamping segment 23 and catcher disk 22 he follows. The intensity of the clamping in the thread holder 24 is set by the preload of the coil spring 25 ,

The NO contact 18 acts on the Knoterschnabel not shown 2 and opens and closes its tongue 19 ,

The 11 shows the knotter device 1 in perspective view. In this figure, the aforementioned elements can be seen. The knot pullers 12 holding the loops from the knotter's beak 2 peel off and thus lead to knot formation are shown as well as the Knoterrahmen 20 and the power transmission from the knotter shaft 3 to the catcher disk 22 the thread holder 24 , In this case, the rotational movement of the knotter shaft 3 on the Knüpferscheibe 4 transfer. From there, the transmission takes place by means of the toothing 5 on the catcher pinion 31 and the cam track 30 , This is in engagement with the cam roller 26 , The lever 21 is for a movement according to the shape of the cam track 30 and continue on the coupling rod 27 on the catcher disk 22 and the linked with this the active counter-blade 29 designed.

The active counter-blade 29 is designed in pairs, so that between the two mirror-like elements of the active counter-blade 29 a slit-like opening is formed in which the knife 10 intervenes. Due to the pivoting movement of the catcher disc 22 and active counterknife 29 be in the thread holder 24 clamped threads 15 . 16 that in a notch of the active counterknife 29 lie against the knife 10 pressed and cut.

Both thread ends are still in the thread holder 24 clamped. By the further rotation of the Knoterschnäbel 2 , driven by the wheel chain 28 , the threads are with their ends further from the thread holder 24 pulled out. In order to release the finished loops formed, there is a further pivotal movement of the catcher disc 22 with the aim of thread ends down from the clamp in the clamping segment 23 push out. Thereafter, the node is pulled off by the node puller 12 the loops formed by the Knoterschnäbeln not shown 2 strips off and these are pulled together into a knot. This completes the formation of both nodes.

12 shows an enlarged view of a portion of the knotter device 1 as they are in 11 is shown. The thread holder is particularly easy to recognize 24 with the catcher discs 22 , the active counterknife 29 that with the coupling rod 27 connected is. Also shown becomes the Knoterschnabel 2 and the wheel chain 28 that serves to his drive. Furthermore, the knot puller 12 , the knotter frame 20 and the lever 21 visible in the figure.

The function of the knotter device 1 and their interaction with the big baler for the formation of pressed or large bales 17 will be described below in part.

The big bale 17 is in not fully illustrated press channel in 1 guided and by an upper thread 15 and a bobbin thread 16 entwined. The two threads 15 . 16 be by a movement of the needle 8th together through the knotter device 1 passed through and over the Knoterschnäbeln 2 positioned. The knotter's beak 2.1 forms the final node for the finished big bale 17 and the knotter's beak 2.2 forms the initial node for the next big bale to be formed 17 , The thread reserve for forming the knots is by pulling the threads 15 . 16 in the thread holder 24 educated.

The energy for forming the nodes is in the illustrated embodiment of the movement of the Knüpferwelle 3 on the Knüpferscheibe 4 transfer. The Knüpferscheibe 4 is for this purpose on the knotter shaft 3 fixed so that a transmission of the rotational movement is possible. The Knüpferscheibe 4 has a toothing 5 - At least on a portion of its outer periphery - on, over which the Knoterritzel 6 is driven. The Knotritzel 6 transmits the rotational movement to the drive train, the drive shaft 13 on which also the spur gear 7 and the knotter's beak 2.1 to sit. About the spur gear 7 the drive shaft 13 the rotational movement is to an adjacent and with the first spur gear 7 engaged second spur gear 7 transmitted, which in turn with an output shaft 14 connected is. The thus driven output shaft 14 transfers the rotary motion to the one with the output shaft 14 connected second knotter beak 2.2 , In one embodiment of the invention drives the drive shaft 13 the wheel chain 28 on, from which the rotary motion on the two knotter beaks 2 is transmitted.

In time advance to the knot forming process moves the catcher disk 22 The strings 15 . 16 continue through the thread holder 24 , first against the knife 10 , which leads to the separation of the two thread ends. After the loop forming process, the thread ends are removed from the thread holder 24 pushed out. This is done to make sure that the thread ends the thread holder 24 even if they have not been pulled out of it during the looping process.

Subsequently, the removal of the knots of the knotter beaks closes 2 through this associated node puller 12 at. The needle 8th Swings back to the starting position and the next cycle can begin.

1

Knotereinrichtung

2

knotter

2.1

knotter termination node

2.2

knotter start node

3

knotter shaft

4

Knüpfer disc

5

gearing

6

Knoterritzel

7

spur gear

8th

needle

9

lateral Fadenandrücker

10

knife

11

cam

12

Knotenabzieher

13

drive shaft

14

output shaft

15

upper thread

16

lower thread

17

Big bales, bales

18

turnkey

19

tongue

20

knotting

21

lever

22

catch disk the thread holder

23

clamping segment the thread holder

24

thread holder

25

coil spring

26

cam roller

27

coupling rod

28

wheel chain

29

active against cutting

30

cam track

31

catchers gear

Claims (13)

Knotting device ( 1 ) for the simultaneous formation of two nodes, comprising two knotter beaks ( 2.1 . 2.2 ), characterized in that a catcher disc ( 22 ) and a clamping segment ( 23 ) each to a thread holder ( 24 ) are arranged for clamping the threads and for forming a thread reserve, wherein the two thread holder ( 24 ) the Knoterschnäbeln ( 2.1 . 2.2 ) and together as a unit between the Knoterschnäbeln ( 2.1 . 2.2 ) are arranged. Knotting device ( 1 ) according to claim 1, characterized in that on a knotter shaft ( 3 ) for driving the catcher disc ( 22 ) - a Knüpferscheibe ( 4 ), wherein the Knüpferscheibe ( 4 ) with a cam track ( 30 ) and the cam track ( 30 ) over a gearbox be with the catcher disc ( 22 ) or - a cam ( 11 ), wherein the cam disc ( 11 ) via a gear with the catcher disc ( 22 ) connected is. Knotting device ( 1 ) according to claim 2, characterized in that the cam track ( 30 ) via a catcher pinion ( 31 ) from the Knüpferscheibe ( 4 ) and an active counter cutting edge ( 29 ) together with the catcher disk ( 22 ) via the gear with the cam track ( 30 ) connected is. Knotting device ( 1 ) according to claim 3, characterized in that the catcher disc ( 22 ) and the active counter cutting edge ( 29 ) are formed as a unit, wherein the active counter cutting edge ( 29 ) with the catcher disk ( 22 ) is motion coupled. Knotting device ( 1 ) according to one of claims 2 to 4, characterized in that the catcher disc ( 22 ) is connected to the transmission such that it performs a pivoting movement back and forth. Knotting device ( 1 ) according to one of claims 1 to 5, characterized in that the drive of the catcher disc ( 22 ) is designed such that it performs a continuous rotational movement in one direction of rotation. Knotting device ( 1 ) according to one of claims 1 to 6, characterized in that the catcher disc ( 22 ) has at least one notch, wherein the notch, the thread layer of an upper thread ( 15 ) and a bobbin thread ( 16 ) secures. Knotting device ( 1 ) according to one of claims 1 to 7, characterized in that both clamping segments ( 23 ) by two coil springs ( 25 ) are loaded adjustable and in each thread holder ( 24 ) the thread tension is separately adjustable. Knotting device ( 1 ) according to one of claims 1 to 8, characterized in that between the thread holders ( 24 ) a fixed, adjustable, with a Knoterrahmen ( 20 ) firmly connected knife ( 10 ) is arranged. Knotting device ( 1 ) according to claim 9, characterized in that the rotatable catcher disc ( 22 ) of the thread holder ( 24 ) is designed in such a way that the threads ( 15 . 16 ) over the knife ( 10 ) and the threads ( 15 . 16 ) cuts. Knotting device ( 1 ) according to claim 9, characterized in that the active counter cutting edge ( 29 ) is designed in such a way that the threads ( 15 . 16 ) over the knife ( 10 ) and the threads ( 15 . 16 ) cuts. Knotting device ( 1 ) according to one of claims 1 to 11, characterized in that the Knoterschnäbeln ( 2.1 . 2.2 ) a double-acting knotter puller mounted on a shaft ( 12 ) assigned. A method for producing two simultaneously formed nodes by means of a device according to claim 1 to 12, comprising the steps of: - positioning of upper thread ( 15 ) and bobbin thread ( 16 ) on the Knoterschnäbeln ( 2.1 . 2.2 ) and in the notches of the catcher discs ( 22 ), - fixing of upper thread ( 15 ) and bobbin thread ( 16 ) on one side of the knotter beaks ( 2.1 . 2.2 ), - pivoting the catcher disc ( 22 ) in the clamping segment ( 23 ) of the thread holder ( 24 ) and fixing the threads ( 15 . 16 ) in the thread holder ( 24 ) on the other side of the knotter beaks ( 2.1 . 2.2 ), - Beginning of the loop formation by means of knotter beaks ( 2.1 . 2.2 ), - severing the threads ( 15 . 16 ) between the two thread holders ( 24 ), - completion of the loops with further movement of the knotter beaks ( 2.1 . 2.2 ), - ejecting the thread ends from the thread holder ( 24 ) by timed further rotation of the catcher disc ( 22 ) and - knot formation when removing the loops from the Knoterschnäbeln ( 2.1 . 2.2 ).