EP3363939A2 - Double bar knitting machine - Google Patents

Abstract

A double-shaped warp knitting machine (1) is provided with a first needle contour (2), which has a first knitting tool arrangement with a plurality of knitting tool types (4, 6, 8) which each have drive units (11, 12, 13) with a first main shaft (10). are in drive connection, a second needle contour (3) having a second knitting tool arrangement with a plurality of knitting tool types (14, 16, 18), which in each case via drive units (21, 22, 23) with a second main shaft (20) in drive connection, and a bar assembly (24) movable between the first needle contour (2) and the second needle contour (3).

One would like to achieve a double-sided warp knitting machine with high productivity.

For this purpose, it is provided that the bar assembly (24) via first drive units (29, 31) with the first main shaft (10) and second drive units (30, 32), the same movement of the bar assembly (24) as the first drive units (29 , 31), is in operative connection with the second main shaft (20).

Description

The present invention relates to a double-shaped warp knitting machine having a first needle contour, which has a first knitting tool arrangement with a plurality of knitting tool types, which are in drive connection via drive units with a first main shaft, a second needle contour, the second knitting tool arrangement with several Wirkwerkzeugarten, each via drive units are in driving connection with a second main shaft, and with a bar assembly movable between the first needle contour and the second needle contour. The barring also carries knitting tools.

Such a warp knitting machine is used, for example, to produce knitted fabrics. A spacer fabric has two cover layers, between which spacer threads are arranged. The two cover layers are each produced by effect tools, wherein the production of a cover layer serving knitting tools are each associated with a needle contour. For the spacer threads, the bar arrangement is used, which is the Spacer threads between the first cover layer and the second cover layer, ie between the first needle contour and the second needle contour leads. Each Wirkwerkzeugart a needle contour is usually attached to a bar. Each bar must perform a predetermined movement in a stitch forming operation. This movement is generated by drive units, which in turn are in operative connection with the main shaft. A drive unit here is the collective term for all moving parts that belong to a knitting tool type and a knitting tool movement and have an expression of kinematics.

Over the length of a bar usually attack several similar drive units to the bar. The more power units on a bar attack, the faster you can operate the warp knitting machine in principle. The more drive units are available, the more support points are available for each barre and the lower the forces per support point.

The increase in the number of units per barre, however, set economic limits. For economic reasons, one would like to use as few power units as possible in order to keep noise, friction, component costs and assembly costs low. Another problem is the limited space. On a certain width section of the warp knitting machine can not be installed as many drive units. Since there are different types of knitting tools with different movements in each needle contour, the number of drive units per knitting tool type and movement must be divided according to load and dynamics.

Each main shaft is exposed to different loads during one revolution, ie different forces and moments, eg by Imbalances and eccentrics. This can lead to speed fluctuations that are tolerable only up to a certain size. In double-contoured machines, the movement of the bar assembly, which guides the spacer threads, is usually effected via one of the main shafts, so that this main shaft is additionally loaded and the torque fluctuations and thus also the speed fluctuations can increase. When operating a warp knitting machine, however, it is important that the two main shafts are operated synchronously with each other. This limits working speed. Moreover, at different speeds, when a gear is used to drive both main shafts, increased wear results, which in turn can result in downtime, which can adversely affect the productivity of the warp knitting machine.

The invention has for its object to provide a double-shaped warp knitting machine with high productivity.

This object is achieved with a double-acting warp knitting machine of the type mentioned above in that the bar assembly is connected via first drive units with the first main shaft and second drive units, which cause the same movement of the bar assembly as the first drive units, with the second main shaft in operative connection.

With this solution, the stresses that are caused by the drive of the bar array, evenly distributed to the two main shafts. Each main shaft participates in controlling the movement of the bar assembly. This not only has the advantage that the load can be distributed more evenly to the two main shafts. One can additionally achieve that the bar arrangement over several "support points" distributed over its length can be driven, which improves the stability of the bar assembly.

Preferably, at least one first drive unit is arranged in an intermediate space between two second drive units parallel to the main shafts. This makes it possible to effect the activation of the bar arrangement, so to speak alternately by the two main shafts. Of course, at least a second drive unit between at least two first drive units may be arranged. Ideally, the first and second drive assemblies are alternately arranged along the length of the bar assembly. One can use a point-symmetric arrangement.

In a preferred embodiment, each main shaft on several sections, each section is mounted in a gearbox, adjacent gearboxes are interconnected by intermediate shafts and at least two gearboxes are arranged parallel to the main shafts offset from one another. The gearboxes, which may also be referred to as "crankcases", typically support the sections of the respective main shafts at their two end faces. If you offset the gear boxes parallel to the main shafts to each other, then you can also offset the corresponding support points on the bar assembly in a simple manner parallel to the main shafts to each other. The offset may mean that the gear boxes are arranged in a gap to each other. But it is also possible that the gear boxes overlap each other in the direction parallel to the main shafts.

Preferably, the billet assembly is driven with a motion resulting from a superposition of two basic motions, each basic movement being controlled by respective drive assemblies operating on both Main shafts are distributed. One of these basic movements is a pivoting movement used for stitching. The stitch formation takes place per main shaft rotation at least twice, ie once per needle contour, offset in time. The other basic movement is then a movement between the two needle contours. This serves to overcome large distances between the needle contours. Assembling the movement of the bar assembly by superimposing two basic motions facilitates the control of the movement and enables the production of spacer fabrics of large thickness.

It is preferred that at least a portion of the main shaft controls the first basic movement and the second basic movement. In this case, therefore, two different drive units are arranged on the portion of the main shaft, each of which controls one of the two basic movements.

It is also advantageous if a drive unit which controls the first basic movement and a drive unit which controls the second basic movement are arranged successively on a main shaft. This also keeps the load of the respective main shaft small.

In a preferred embodiment, it is provided that the drive units connected to the first main shaft engage the bar arrangement at a first position relative to a depth of the warp knitting machine and the drive assemblies connected to the second main shaft at a second position relative to the depth of the warp knitting machine at the bar arrangement attack, wherein the first position and the second position are arranged on different sides on a plane parallel to the main shafts and between the main shafts center plane. The "depth" of the warp knitting machine is a direction between the two needle contours. The drive units then attack outside the middle between the needle contours on the barring arrangement.

It is preferred that the first position and the second position are arranged symmetrically to the median plane. This can be at least largely build the warp knitting machine of two almost or completely identical machine parts, which are arranged back to back. This facilitates production and keeps costs low.

Preferably, each main shaft has its own drive motor. It is then only necessary to synchronize the two drive motors, which can be achieved with motor controls. Thus, the wear on the gear assembly between the two main shafts is kept small.

Fig. 1

eine stark schematisierte Darstellung einer ersten Ausführungsform einer doppelfonturigen Kettenwirkmaschine,

Fig. 2

eine stark schematisierte Darstellung einer vereinfachten Ausführungsform der Kettenwirkmaschine und

Fig. 3

eine Draufsicht auf die Ausführungsform nach Fig. 2.

The invention will be described below with reference to a preferred embodiment in conjunction with the drawings. Herein show:

Fig. 1

a highly schematic representation of a first embodiment of a double-contour warp knitting machine,

Fig. 2

a highly schematic representation of a simplified embodiment of the warp knitting machine and

Fig. 3

a plan view of the embodiment according to Fig. 2 ,

A schematically illustrated double-shaped warp knitting machine 1 has a first needle contour 2 and a second needle contour 3. The first needle contour 2 has knitting tools which form, for example, a first cover layer of a spacer knit, and the second needle contour 3 has knitting tools which form the second cover layer of the spacer knit.

For this purpose, the first needle contour 2 knitting needles 4, which are arranged on a knitting needle bar 5, guide needles 6, which are arranged on a Garnadelbarre 7, and piercing comb 8, which are arranged on a pierce comb 9. All arranged on one of the bars 5, 7, 9 knitting tools perform the same movements. These movements are controlled by a first main shaft 10, which are each connected via drive units 11, 12, 13 with the respective bars 5, 7, 9. The drive units 11, 12, 13 are shown here only as lines. In reality, the drive units usually comprise several elements, such as eccentrics or connecting rods on the first main shaft 10 and levers, joints and plunger, as is well known.

In the same way, the second needle contour knitting needles 14 which are arranged on a knitting needle 15, guide needles 16 which are arranged on a yarn needle bar 17, and piercing comb plates 18 which are arranged on a piercing comb bar 19, on. In the same way as in the first needle contour, the bars 15, 17, 19 are driven by a second main shaft 20 which is connected to the bars 15, 17, 19 via drive units 21, 22, 23, respectively.

In principle, the two needle contours 2, 3 may be mirror-symmetrical to each other and may then be arranged back to back to each other.

In some double-ended warp knitting machines, the guide needles 6, 16 and, accordingly, the guide needle bars 7, 17 are not moved. Here then the associated drive units 12, 22 omitted.

The warp knitting machine 1 further comprises a bar assembly 24, with the threads between the two needle contours 2, 3 are placed back and forth can. The bar assembly 24 is therefore intended to produce the spacer threads in the spacer fabric. The bar assembly 24 has a plurality of bars 25, each carrying laying needles or needles 26. Only at a bar guide needles 26 are shown in order not to affect the overview.

The movement of the bar assembly 24 is composed of two basic movements. A first basic movement is effected via a first lever arrangement 27, on which a second lever arrangement 28 is articulated, which controls the second basic movement. The first basic movement causes the billet assembly between the two needle contours 2, 3 is moved back and forth. The second basic movement causes the bars 25 can form 26 stitches with their guide needles. The second basic movement is therefore much smaller and basically serves only to guide the guide needles 26 around the knitting needles 4 of the first needle contour 2 or around the knitting needles 14 of the second needle contour 3.

The first lever arrangement 27 is controlled by first drive units 29 of the first main shaft 10 and second drive units 30 of the second main shaft 20. Both drive units 29, 30 mediate the first lever assembly 27, however, the same movement.

The first drive units 29 and the second drive units 30 engage over the working width or length of the warp knitting machine (in the drawing perpendicular to the plane of the drawing) at respectively different positions on the first lever arrangement 27. This achieves two things: on the one hand, the first lever arrangement 27 can be driven at a relatively large number of support points by the two main shafts 10, 20. On the other hand, the load of the first lever assembly 27 evenly distributed to the two main shafts 10, 20, so that by the movement of the first lever assembly 27 no or at most low torque differences act on the two main shafts 10, 20. The fluctuations in the rotational speeds of the two main shafts 10, 20 can be kept small accordingly and they can be at least approximately similar to each other.

The second basic movement, with which the second lever arrangement 28 is controlled, is effected by the two main shafts 10, 20 via first drive units 31 and second drive units 32. These two drive assemblies drive the second lever assembly 28 similar and attack over the length or working width of the warp knitting machine 1 at different positions. This is illustrated in both lever arrangements 27, 28 in that the two drive units 29, 30 and 31, 32 engage in front of and behind the lever arrangements 27, 28.

Fig. 2 shows a simplified embodiment of the warp knitting machine 1, in which only a basic movement of the bar assembly 24 is required. Accordingly, only one lever arrangement 28 is provided, which is controlled by the two drive units 31, 32, wherein the first drive unit 31 is in operative connection with the first main shaft 10 and the second drive unit 32 with the second main shaft 20.

The two drive units 31, 32 engage distributed over the length or working width of the warp knitting machine 1 at different positions, which is illustrated by the fact that the first drive unit 31 behind the lever assembly 28 and the second drive unit 32 engages in front of the lever assembly 28. Again impart both drive units 31, 32 of the bar assembly 24, the same movement.

Fig. 3 shows a highly schematic top view of the warp knitting machine 1 after Fig. 2 , For reasons of clarity, the comb combs 9, 19 are not shown here.

The main shaft 10 is driven by a drive motor 33. The main shaft 20 is driven by a drive motor 34. The two drive motors 33, 34 are electrically synchronized with each other, which is represented by a line 35. But it is also possible to mechanically synchronize the two drive motors 33, 34 with each other or to use a single motor which drives both drive shafts 10, 20 via a transmission.

The main shaft 10 has a plurality of sections 35, 36, 37, which are coupled to each other via an intermediate shaft 38. The intermediate shaft 38 is shown for reasons of clarity only between the sections 36 and 37 and connected to these two sections 36, 37 via couplings 39, 40. A similar intermediate shaft is also provided between the sections 35, 36 and between the drive motor 33 and the section 35.

The portion 35 of the main shaft 10 is disposed in a gear box 41, the portion 36 is disposed in a gear box 42 and the portion 37 is disposed in a gear box 43. The gear boxes can also be referred to as "crank boxes".

Each section 35, 36, 37 of the first main shaft 10 is connected to drive units 11, 12 for driving the Wirknadelbarre 5 and for driving the Garnadelbarre 7. In addition, the first portion 35 and the second portion 37 are connected to the main shaft 10 via first drive units 31 with the lever assembly 28 which controls the bar assembly 24.

Similarly, the second main shaft has a first portion 44 and a second portion 45, wherein the first portion 44 in a first Crank 46 and the second portion 45 is mounted in a second crankcase 47.

The first section 44 is connected to the knitting needle bar 15 via a drive unit 21. The first section 44 is also connected via a drive unit 22 with the Garnadelbarre 17 in operative connection. Furthermore, the second section 45 is connected via a drive unit 21 with the knitting needle bar 15 and via a drive unit 22 with the knitting needle bar 17 in operative connection.

Furthermore, both sections 44, 45 via second drive units 32 with the lever assembly 28 of the bar assembly 24 in operative connection, so that the drive of the bar assembly 24 via both main shafts 10 takes place simultaneously and similar.

As with the first main shaft 10 also, the two sections 46, 45 and the motor 34 are connected via intermediate shafts in connection, which are not shown in detail for reasons of clarity.

The gear boxes 41, 42, 43 of the first main shaft 10 and the gear boxes 46, 47 of the second main shaft 20 are parallel to the longitudinal direction of the main shafts 10, 20 offset from one another. You can still overlap. But they can also be arranged on a gap to each other.

Depending on the working width or length of the warp knitting machine, more than the illustrated three sections 35, 36, 37 of the first main shaft 10 and the two sections 44, 45 of the second main shaft 20 may be provided. The minimum distance from one crankcase to the next can be, for example, 300 to 350 mm. The distance of the units 11, 12, 31 and 21, 22, 32 within a crankcase, for example, 140 to 150 mm.

How to get the Fig. 3 can be seen, two second drive units 32 are arranged between two first drive units 31. But you can also arrange the first drive units 31 and the second drive units 32 alternately.

The embodiment of the warp knitting machine, which in the Fig. 2 and 3 When the bar assembly 24 is driven with a movement composed of a superposition of the first basic movement and the second basic movement, as in Fig. 1 shown, then you can on a main shaft 10, 20 consecutively one the first basic movement controlling drive unit 29, 31 and a second basic movement controlling drive unit 30, 32 arrange, which of course is also possible vice versa. Preferably, then these two drive units are arranged in a gearbox. But it is also possible to distribute these drive units on several gear boxes.

How to get into the Fig. 1 and 2 can recognize, engage with the first main shaft 10 connected drive assemblies 29, 31 and connected to the second main shaft 20 drive assemblies 30, 32 on both sides of a median plane to the lever assemblies 27, 28, wherein the median plane parallel to the main shafts 10, 20 and between the main waves runs.

Claims (9)

Double-face warp knitting machine (1) having a first needle contour (2) which is in drive connection with a first knitting tool arrangement with a plurality of knitting tool types (4, 6, 8) which are respectively drive-connected via drive units (11, 12, 13) to a first main shaft (10), comprising a second needle contour (3) having a second knitting tool arrangement with a plurality of knitting tool types (14, 16, 18), which in each case via drive assemblies (21, 22, 23) with a second main shaft (20) are in drive connection, and a bar assembly (24) which is movable between the first needle contour (2) and the second needle contour (3), characterized in that the bar assembly (24) via first drive units (29, 31) with the first main shaft (10) and second drive units (30, 32), which cause the same movement of the bar assembly (24) as the first drive units (31) is in operative connection with the second main shaft (20). Warp knitting machine according to claim 1, characterized in that parallel to the main shafts (10, 20) at least one first drive unit (31) is arranged in an intermediate space between two second drive units (32). Warp knitting machine according to claim 1 or 2, characterized in that each main shaft (10, 20) has a plurality of sections (35, 36, 37; 44, 45), each section (35, 36, 37; 44, 45) in a gear box (41, 42, 43, 46, 47), adjacent gear boxes (42, 43) are interconnected by intermediate shafts (38) and at least two gear boxes (35, 36, 37; 46, 47) parallel to the main shafts (10 , 20) are arranged offset from each other. Warp knitting machine according to one of claims 1 to 3, characterized in that the bar assembly (24) is driven with a movement resulting from a superposition of a first basic movement and a second basic movement, each basic movement in each case by drive units (29, 30; 31, 32) which are distributed on both main shafts (10, 20). Warp knitting machine according to claim 4, characterized in that at least a portion of the main shaft drives a drive unit controlling the first basic movement and a drive unit controlling the second basic movement. Warp knitting machine according to claim 4 or 5, characterized in that on a main shaft successively a first basic movement controlling drive unit and the second basic movement controlling drive unit or vice versa are arranged Warp knitting machine according to one of Claims 1 to 6, characterized in that the drive assemblies (29, 31) connected to the first main shaft (10) engage the bar assembly (24) at a first position relative to a depth of the warp knitting machine (1) and the Drive units (30, 32) connected to the second main shaft (20) engage the bar assembly (24) at a second position relative to the depth of the warp knitting machine, the first position and the second position being on different sides of a parallel to the main shafts (10 , 20) and between the main shafts (10, 20) extending median plane are arranged. Warp knitting machine according to claim 7, characterized in that the first position and the second position are arranged symmetrically to the median plane. Warp knitting machine according to one of claims 1 to 8, characterized in that each main shaft (10, 20) has its own drive motor (33, 34).

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