KR20070095392A - Circular knitting machine and method for taking up the fabric by a circular knitting machine - Google Patents

Abstract

A method for taking up the fabric (4) produced by the cylinder (3) of a circular knitting machine (1), comprising the steps of taking down the fabric (4) and taking up the fabric (4) by actuating in rotation a take-down and take-up assembly (6) independently from the cylinder (3) at a speed differing from the speed of the cylinder (3). It is further provided for a circular knitting machine comprising a cylinder (3) that can be actuated in rotation at a first angular speed so as to produce at least a tubular fabric (4), and a take-down and take-up assembly (6) that can be actuated in rotation at a second angular speed so as to engage and take up the fabric (4) produced by the cylinder (3), in which said take-down and take-up assembly (6) can be actuated in rotation independently from the motion of the cylinder (3) at a second angular speed differing from the first angular speed of the cylinder (3).

Description

CIRCULAR KNITTING MACHINE AND METHOD FOR TAKING UP THE FABRIC BY A CIRCULAR KNITTING MACHINE

The present invention relates to a circular knitting machine and a method for winding a fabric produced by the circular knitting machine.

TECHNICAL FIELD The present invention relates to the field of textiles, and in particular to fabrics by means of circular knitting machines equipped with take-down and take-up assemblies and rotating cylinders for unwinding and winding fabrics produced by circular knitting machines. It is related to doing. In more detail, the devices for unwinding (unwinding) and winding (winding) tubular fabrics, as disclosed and described in Italian patent IT1.309.184, issued to the applicant of the present application, generally rotate on the machine frame. Possibly mounted and acting on a tubular fabric coming out of the corresponding cylinder.

Eventually, the movable sea cover and winding assembly includes an apparatus for flattening the tubular fabric to be fed, and one or more traction elements for feeding the fabric to be processed in a controlled manner.

As is known, the moveable sea circle and take-up assembly rotates integrally with the machine cylinder. In other words, both the machine cylinder and the sea zone and the take-up assembly turn at the same angular velocity about a common central axis of rotation. Simultaneous synchronized movement of the machine cylinder and the sea roll and take up assembly is achieved by pulling the sea roll and take up assembly or by giving the sea roll and take up assembly mechanical drive at the same angular velocity as the machine cylinder.

The sea voyage and take-up assembly may wind up the tubular woven fabric by rolling or lap after decoupling the tubular woven fabric, and the sea voyage and take-up assembly is provided with cutting means for automatically cutting the fabric coming out of the cylinder. Where the cut fabric is then opened through suitable outspreading devices and unwound in an already open roll.

The knitting machines described above have several disadvantages mainly in the case of discontinuous or over-plied yarns which suffer from inherent structural fabric twists, a phenomenon commonly known as "turns."

Such behavior due to the intrinsic stress of the yarn structure as described above, i.e. the twisting, to increase the structural resistance of the yarn, affects to a considerable extent the organization of the tubular fabric produced by the knitting machine, so that the fabric, When cut directly by the winding assembly, it may be deformed or twisted into a cylindrical shape having a "twisting" or deformed flat shape.

Thus, the tubular fabric produced and wound by a knitting machine tends to deform due to the stress as mentioned above. As a result, in some cases, problems of severe deformation occur in manufactured articles manufactured with fabric wound on a roll, which occurs even after further finishing the manufactured article, resulting in a deterioration of the quality of the manufactured article. Bring it. In order to overcome these problems, some manufacturing apparatuses have means for balancing yarns in order to avoid their own twisted structure.

Some of these use balanced twisted yarns (which are very expensive), and use opposite twisted yarns (which have the undesirable effect known as "millerays"). Or winding the tubular fabric followed by natural twisting of the fabric followed by manual cutting.

In the latter solution, the knitted tube is suspended and dropped without the action of stress to deform into its own natural spiral twist. The knit fabric is then manually cut in a twisted manner with respect to the ribs or vertical cords, ie "twisted warps" of the knit fabric, of course followed by the deformation helix of the fabric. Win. The flat fabric thus obtained is cut in a twisted form, and of course here is also followed by a strain line, but since the flat fabric is already twisted and thus has reached its own structural stability, subsequent deformation of the flat fabric has been achieved. It can be prevented.

Even when the fabric tube is automatically wound up without cutting directly from the winding assembly, a permanent fold in the fabric sometimes occurs, the fold being inclined with respect to the subsequent cutting line, thereby degrading the quality of the fabric and the end product. It should be noted.

Thus, by using the fabric that has been "torsion-cut", it is possible to obtain an article of clothing which retains tissue while maintaining various treatments such as, for example, dyeing, hot washing, milling for softening, and the like.

Torsional cutting does not cause any aesthetic problem in the final product, because at a given thickness the final product is uniform even after various treatments and vertical cords or wales are no longer distinguished from horizontal courses Because it is not. Thus, it is irrelevant to the aesthetic point of view that the fabric is torsionally cut about the vertical cords.

After the tubular fabric is cut after deformation in consideration of the deformation, it is possible to obtain a stable and undeformed product during the treatment of various washing and ironing operations before or after sale. FIG. 10 shows a knitted tube 4 made of plied yarn, showing a state before deformation as seen in a conventional tube made of conventional yarn, along a knitting cord or fabric bone in the vertical direction. It is cut along the cutting line parallel to the central axis "X". The flat fabric thus obtained is cut parallel to the vertical knitting cord or wale 4a as shown in FIG. 11 and then twisted (shown exaggerated for clarity) as shown in FIG. ), Resulting in deformation of the knitted product made from the fabric (4).

10a shows that the same knitted tube 4 is represented by the angle α set between the direction of the vertical cord or fabric bone 4a after deformation and the corrected cut line 5 during the twisted warp. It shows the knitted tube 4 after deformation occurring when suspended without action. The cutting line 5 twisted with respect to the fabric bone 4a gives a fabric as shown in FIG. 11A, which is twisted with respect to the fabric bone 41 but is already deformed and no longer Without deformation, the dimensions are stabilized accordingly.

However, empirical manual fabric manufacturing as described above is very expensive, low in reliability, and low in repeatability since it depends on the ability of the operator.

Moreover, such techniques are not applicable to seamless products that are not cut, sewn and maintain the same structure as the knitting tubes made in knitting machines.

After all, it should be noted that winding the fabric into the tube sometimes does not produce correctly, given the subsequent fabric deformations that result in permanent folds in the fabric, resulting in poor quality of the final product.

Thus, products manufactured at different qualities can often appear, with a large amount of pieces occurring, resulting in significant economic losses.

In this situation, the technical problem in the present invention is to provide a circular knitting machine and a fabric manufacturing method that can basically solve the above-mentioned defects. In the basic framework of the above technical problem, a main object of the present invention is that a sea circle and a winding assembly operating on a tubular fabric produced by a circular knitting machine cylinder may wind up a knitting tube in view of subsequent fabric deformation due to internal stress. I would like to create a circular knitting machine. Another object of the present invention is to mechanically detect a knitting tube made by a knitting machine by means of a control system of the knitting machine, so that a flat fabric can be obtained that is dimensionally stable and that does not undergo subsequent structural deformation. It is an object of the present invention to provide a machine and method for winding in a mathematically controlled manner.

It is a final technical object of the present invention to provide a machine and method capable of winding a knitted tube made by a knitting machine by taking into account the internal stress of the fabric and thereby automatically cutting the fabric correctly for subsequent deformation of the fabric. will be.

The technical problems and objects mentioned here are basically achieved by a circular knitting machine and a fabric manufacturing method, characterized in that it comprises one or more technical solutions as claimed below.

The following description includes, but is not limited to, the description of some embodiments with reference to the embodiments according to the present invention shown in the accompanying drawings as non-limiting exemplary.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front view of a machine according to the present invention, in partial cross section, according to a first embodiment of winding a fabric into a tube.

FIG. 1A shows a second embodiment of the machine of the invention as in FIG. 1, in which displacement between the sea circle and the winding assembly and the cylinder is carried out by a mechanical device.

FIG. 1B shows a stationary frame of the machine as shown in the preceding figure. FIG.

FIG. 2 is a front view of a third embodiment of the apparatus of FIG. 1, in which the sea circle and winding assembly automatically cuts and unfolds the fabric and winds up the unrolled fabric and the fabric produced accordingly.

3 is a perspective view of a lower portion of a knitting machine having a device which automatically winds up in an open form by cutting the tubular fabric produced by the cylinder of the knitting machine of FIG. 2;

FIG. 4 is a perspective view of the support frame of the sea circle and take-up assembly as shown in FIG. 2.

FIG. 5 is a perspective view of an unsealed and wound assembly of a machine as shown in FIG. 2.

FIG. 6 is an enlarged perspective view of the cutting means of the sea circle and winding assembly of FIG. 5;

Fig. 7 is a front view showing, in partial cross section, a machine of the invention according to a first modification of the first embodiment of the invention;

8 is a front view showing, in partial cross section, a machine of the invention according to a second modification of the first embodiment of the invention;

Fig. 9 is a front view showing, in partial cross section, a machine of the present invention according to a third modification of the first embodiment of the present invention.

FIG. 10 is a schematic representation of an unstrained tubular fabric showing a traditional cut line parallel to the axis of rotation and parallel to the axis of the ribs of the knitted fabric.

FIG. 10A is a view similar to that of FIG. 10, showing that the fabric is deformed by internal stress, and showing the axis and correction cut line of the rib of the deformed fabric.

FIG. 11 is a schematic illustration of a feature that is cut in a traditional manner parallel to the fabric lip and subjected to structural modification.

FIG. 11A is a schematic illustration of a fabric cut to the correct slope and free of structural deformation in accordance with the present invention. FIG.

12 shows a tubular fabric showing spiral cut lines corresponding to structural deformations.

Referring to the accompanying drawings, reference numeral 1 generally denotes a circular knitting machine according to the present invention.

The circular knitting machine 1 (not shown fully in the drawing) includes a stationary support frame 2 comprising a lower stationary frame with a base 2a, three lateral strut legs 2b, and an upper strut ring 2c. 1b); And a movable cylinder 3. The movable cylinder 3 is mounted on the upper ring 2c, on which at least a tubular fabric (shown as indicated by reference numeral 4 in Fig. 2) is gradually produced. Knitting machine 1 also includes a sea circle and take-up assembly 6, which is cooperatively engaged with the support frame 2 on the cylinder 3 for winding up the tubular fabric produced by the cylinder 3. The movable cylinder 3 can be operated to rotate at a predetermined angular velocity suitable for the tubular fabric currently being produced about the central axis of rotation X. The sea circle and take-up assembly 6 comprises a support frame 7 which rotates about the central axis of rotation X, wherein the upper portion of the support frame preferably flattens the tubular fabric emerging from the cylinder 3. The planarization means 8 is provided. The flattening means 8 comprises an unfolding frame (which can have any shape) and a fabric being properly spaced from one another, which gradually deforms the cylindrical shape of the tubular fabric by essentially flattening the tubular fabric in the radial direction. It includes a pair of parallel rollers 9 defining the range of.

A fabric conveying roller 13 is placed in the center of the support frame 7 of the sea roll and take up assembly 6, with a set of pull rollers 14 for feeding the fabric through the sea roll and take up assembly 6. Is engaged on the same placement plane as the transfer roller 13. A winding assembly 15 for unfolding the fabric outward is arranged downstream of the set of pull rollers 14. Alternatively, it is also possible to provide a currently known device for winding tubular fabric with layered layers.

In the third embodiment shown in FIG. 2, referring to a machine, generally known as an “open” type, in which the fabric is automatically cut under the parallel roller 9 in the machine, as will be described in detail below. Cutting means 10 are operatively arranged to gradually cut while being fed along a predetermined cutting trajectory, and there are opening and spreading means 11 for spreading the cut fabric into a single layer.

2, the opening and unfolding means 11 further comprise two branching rollers 12 for the lateral edges of the fabric obtained by weaving and cutting, from which the fabric unfolds the fabric. The conveying roller 13 for reaching. Each of the branching rollers 12 is preferably and advantageously provided with an independent motor 12a, which assists in spreading the fabric during feeding of the fabric. The branching roller 12 is preferably inclined along a downwardly diverging line, which results in a more uniform traction on the fabric around the cylinder. 4 shows a support 43 for the branching roller 12.

According to the invention, the machine of the invention further comprises means 16, 23, 44 for varying the relative angular position between the sea roll and the winding assembly 6 and the cylinder 3 during winding of the fabric.

The means 16, 23, 44 are described in detail in the following description of the particular embodiment, which in some cases is a control means for rotating the sea circle and winding assembly 6 independently of the cylinder 3. (16);

From the first operating state in which the sea roll and take-up assembly 6 is integral with the cylinder 3 (rotates integrally with the cylinder), the sea roll and take-up assembly 6 is given relative to the cylinder 3. Interconnecting means (23) capable of selectively switching to a second operating state moving at a state instantaneous angular velocity;

And an intermittent offset device 45, 46 for biasing the relative angular position between the sea circle and take-up assembly 6 and the cylinder 3 to at least one rotational angular position of the cylinder.

It should be noted that the term "angular velocity" herein includes both the instantaneous relative angular velocity (at each moment) and the total or average angular velocity obtained after multiple revolutions. Thus, even if the sea roll and take-up assembly 6 rotates integrally with the cylinder 3 during the entire rotation and are intermittently deflected at some angle, the space between the sea roll and take-up assembly 6 and the cylinder 3 will therefore be limited. There will be some difference in angular velocity.

Preferably, the knitting machine 1 of the present invention rotates the sea roll and take-up assembly 6 at an angular velocity that varies from a minimum value below the angular velocity of the movable cylinder 3 to a maximum value above the angular velocity of the movable cylinder 3. It further comprises a control means 16 operatively coupled with the sea zone and take-up assembly 6 for operation. Preferably, the constant control means 16

At least one disposed inside the housing compartment in the support frame 2, for example, so that the angular velocity of the sea-sea and the winding assembly 6 can be adjusted according to the torsion rate of the tubular fabric 4 produced on the cylinder 3. Operatively coupled to the electronic control unit 17 (shown schematically in FIG. 3). In other words, the electronic control unit 17 controls the angular velocity of the sea voyage and take-up assembly 6 via the control means 16, whereby the sea voyage and take-up assembly 6 attempts to define a trajectory to wind the fabric. In order to meet the object of the invention it is to rotate faster or slower than the cylinder (3). Preferably, the electronic control unit 17 is integrated into a conventional overall control system of the knitting machine so that it can be controlled by conventional knitting machine control means. In the embodiment of FIG. 2, the electronic control unit 17 preferably acts on an independent motor 12a of the branching roller 12 in order to control the optimum fabric winding in proportion to the fabric cutting angle. The winding depends on the sea roll and the relative rotation between the winding assembly 6 and the cylinder 3.

Knitting machines also include optical means or other forms of automatic detection means (not shown in the drawings) that can automatically detect the inclination of the fabric deformation spiral and are operatively connected to the electronic control unit 17.

The detection means is activated, for example, when production has begun, when manufacturing part of the tubular fabric without traction, when the tubular fabric is left in its free state without deformation, and when the deformation of the fabric is detected.

The detection value thus detected is compared with a value which is set manually or compared with a value predicted in advance according to the type of yarn or the remaining manufacturing variables, and serves as an additional check on the accuracy of the machine setting.

Particularly as an example, the relative rotation of the sea circle and the winding assembly 6 relative to the cylinder 3 follows the following mathematical equation.

P = π2rtan (90-α)

P = πDtan (90-α)

Here, "P" (when referring to FIGS. 11A and 12) is the torsion rate of the tubular fabric, i. Number of millimeters of fabric; "D" and "r" are each the diameter and radius of the tubular fabric; "α" represents the spiral inclination angle set in the electronic control unit 17 before the knitting machine 1 operates.

Knitting machine 1 is, for example, a 30-inch circular knitting machine with a helix slope of 5 mm 3, and the torsion rate according to one of the above equations is:

P = π · 762mm · 11.43

P = 27,348mm = 27.348m

In this case, the sea roll and take-up assembly 6 is delayed by one revolution relative to the cylinder 3 every 27,348 mm of the tubular fabric produced.

Tubular, manufactured every revolution, which depends on several variables of the manufacturing process and can be obtained from the rotational speed of the expander roller, the value of which can be directly detected by the control unit 17 or set manually. Considering the fabric, the following equation can be obtained as an example.

Prg = 60 mm / rotation

By dividing the torsion rate in mm by the manufactured tubular fabric Prg, it is possible to obtain a rotational speed that requires 360 ° of displacement (one revolution) between the cylinder 3 and the sea circle and winding assembly 6.

27,348mm: 60mm / revolution = 455.8 revolutions

Furthermore, dividing the 360 ° deflection between the cylinder 3 and the unsealed and unwound assembly 6 by the number corresponding to the number of revolutions required for the unsealed and unwound assembly 6 to deflect 360 °, the unsealed and unwound assembly The angular displacement pre-rotational speed between 6 and the cylinder 3 can be obtained.

360 ㅀ: 455.8 revolutions = 0.789 ㅀ for every revolution of the cylinder

According to these variables, the sea area and take-up assembly 6 are delayed 0.789 kPa relative to the cylinder 3 at every rotation of the cylinder 3, and the speed of the inflator is proportionally lower than the speed of the cylinder.

On the contrary, when the knitting machine 1 is a 30-inch circular knitting machine and the spiral inclination is -5 ㅀ, the torsion rate according to the above equation becomes as follows.

P = π762 mm (-11.43) = -27.348 m

In this case, the sea roll and take-up assembly 6 rotates one revolution before the cylinder 3 every 27,348 mm of the tubular fabric produced.

According to a first embodiment of the present invention as shown in FIG. 1, the sea circumference and winding assembly 6 rotates about a central axis of rotation X and is coupled to the cylinder 3 via interconnection means 23. The interconnecting means is adapted to move the seattle and take-up assembly 6 at a given instantaneous angular velocity with respect to the cylinder 3 from the first operating condition in which the seattle and take-up assembly 6 is integral with the cylinder 3. Can be selectively switched to the second operating condition. In particular, the interconnecting means 23 transmits at least one first movement drive element 24 which transmits an integral movement to the cylinder 3, and transmits the combined movement to the sea tract and winding assembly 6 and the auxiliary motor. At least one second movement drive element 25, wherein the auxiliary motor acts on the second movement drive element.

Said first motion drive element 24 is mounted on the frame of the sea circle and take-up assembly 6 by means of a conventional bearing system 24a, for example as a crown wheel which rotates integrally with the cylinder 3. The second movement drive element 25 is operatively coupled with a wing crown wheel as a toothed wheel mounted on the sea circle and take-up assembly 6. The engagement between the first and second motion drive element and the cylinder 3 and the sea circle and take-up assembly 6 may be reversed as long as basically the same result can be achieved.

Basically, the sea zone and winding assembly 6 rotates integrally with the cylinder 3 when the auxiliary motor 25 is in an inactive state, while the auxiliary motor 25 is operated by a machine control system. When present, the sea zone and take-up assembly 6 rotate relative to the cylinder, such that the total rotation at an absolute rotational speed different from the cylinder 3 speed is increased or lowered in some cases.

This technical solution makes it possible to obtain a very high drive ratio (e.g., 1 / 4,200) between the first motion drive element 24 and the second motion drive element 25, thus rotating the cylinder 3 A very high accuracy in the difference between the speed and the rotational speed of the sea roll and the take-up assembly 6 can be obtained.

In particular, the sea roll and take-up assembly 6 is connected to the cylinder 3 by at least one towing frame 42 (see FIGS. 1 and 4). When the cylinder 3 is in rotational operation about the central axis of rotation X, the cylinder rotates with the traction frame 42, which will be described in detail below, but by way of example the sea-sea and winding assembly 6. It includes two towing arms that rotate rotationally.

The movement of the cylinder 3 is obtained by the conventional drive means 30, which is well known for the conventional drive means and will not be described in further detail.

In a second embodiment as shown in FIG. 1A, the means 16, 23, 44 for changing the relative angular position may be configured to determine the relative angular position between the sea circumference and winding assembly 6 and the cylinder 3. Mechanically intermittent offset devices 44, 45, 46 for biasing at least one rotational angular position of 3).

In practice, in the above case, for example, the first movement drive element 24 (eg crown wheel) rotates integrally with the cylinder, and the second movement drive element 25 (eg tooth shaping wheel) is a sea zone and There is one mounted on the winding assembly 6 and operatively coupled with the first movement drive element 24.

In this case, however, there is no auxiliary motor 26 and the mechanical biasing device is a stationary element 45 (eg rack or cam) integral with the stationary support frame 2 of the knitting machine. The stationary element is coupled to the second movement drive element 25 when the second movement drive element 25 comes into orbit with the sea tract and take-up assembly during rotation of the sea tract and take-up assembly 6. It cooperates with the second motion drive element 25 so that a predetermined rotation can be caused and thus a predetermined deviation can be caused for every rotation between the sea zone and the winding assembly 6 and the cylinder 3. In such a case, the second motion drive element 25 must be mounted on the sea tract and take-up assembly 6 by a suitable device 46 (including, for example, a bearing and a known free wheel device). In addition, the second movement drive element is provided with an operating lever which cooperates with the cam 45 and is returned to its position by the spring after the second movement drive element 25 rotates.

Basically, known instruments that can be used for the intermittent biasing devices 44, 45, 46 are not disclosed in further detail herein.

In another alternative embodiment, a rotating frame 7 may be provided which is integral with the cylinder 3 or which somehow rotates in synchronization with the cylinder 3, on which the sea circle and winding assembly 6 is provided. Can be mounted, in which case the sea roll and take up assembly can be shifted on the rotating frame such that a desired difference in angular velocity between the sea roll and take up assembly 6 and the cylinder 3 can be obtained. .

In the third embodiment as shown in Figs. 2 to 6, referring to a machine designed as a so-called "open" type machine in the conventional manner, the sea circumference and winding assembly 6 automatically cuts the fabric before the fabric is wound. Cutting means 10 are provided.

As can be seen in FIGS. 5 and 6, the cutting means 10 are essentially parallel to the central axis of rotation X, so that the tubular fabric coming out of the cylinder 3 can be cut basically on a spiral cutting trajectory. At least one cutting element 10a which is switched between the first position and the second position inclined with respect to the central axis of rotation X, wherein the torsion rate of the cutting trajectory is preferably in accordance with the torsion rate of the tubular fabric. Corresponds.

The position of the cutting element 10a is between the cylinder 3 and the sea zone and winding assembly 6 so as to define the desired inclination of the cutting spiral to follow the torsional spiral of the tubular fabric made by the knitting machine. It is selected in proportion to the difference in the angular velocity of. As can be seen in FIGS. 5 and 6, the cutting means 10 preferably further comprise at least one electric motor 4, which is electronically controlled to operate the cutting element 10a. It is advantageous to be controlled by the unit 17.

The cutting element 10a is also associated with an actuating means 39 for switching the cutting element 10a between the first and second positions so that the cutting element 10a can be placed in a suitable position for cutting the feeding tubular fabric. desirable.

The actuation means 39 can be configured manually. In this case, the proper position of the cutting element 10a for cutting the tubular fabric being fed is such that the knitting of the tubular fabric has different parameters compared to the previous one before every operation of the knitting machine 1 or according to the manufacturing requirements. When making on the loom 1, the operator performing the operation of the actuating means 39 can be achieved directly by displacing the actuating means with respect to the gradually changing scale 39a.

As an alternative example, the actuating means 39 can be configured automatically and thus directly by the electronic control unit 17 so as to define the cutting element 10a in an automatic and programmed manner according to the desired inclination. Can be controlled.

Here, the cutting trajectory, which is inclined with respect to the central axis of rotation X and is preferably spiral, can be established differently according to the torsion rate of the tubular fabric due to the stress of the yarn, and is obtained through the angular velocity difference between the cylinder and the sea zone and the winding assembly. Be aware of this.

According to a first variant of the first embodiment of the invention as shown in FIG. 7, the control means 16 comprises at least one electric motor 18, preferably a brushless motor or any other conventional form. And a drive means 19 operatively disposed between the electric motor 18 and the sea roll and take up assembly 6 for rotating the sea roll and take up assembly at a predetermined angular velocity.

As can be seen in FIG. 7, the electric motor 18 can be rotated about the center axis of rotation X together with the sea circle and take-up assembly 6 to support the frame of the sea circle and take-up assembly 6. The drive means 19, which are integrally coupled with the lateral edge 7a of 7) and connected to the drive shaft 18a which extends below the electric motor 18, extend mainly under the sea circle and take-up assembly 6. More specifically, the drive means 19 comprises a first drive pulley 20 mounted to the drive shaft 18a of the electric motor 18. The first drive pulley 20 rotates integrally with the drive shaft 18a about a first rotational axis Y that is essentially parallel to the central rotational axis X of the cylinder 3 and the sea circle and take-up assembly 6. do. The drive means 19 also comprise a second drive pulley 21 lying essentially on the same plane as the first drive pulley 20. The second drive pulley 21 is operatively cooperating with the first drive pulley 20 and is integrally coupled to the fixed support frame 2 on the central rotation axis X. A drive belt 22 is further operably disposed between the first drive pulley 20 and the second drive pulley 21. The drive belt 22 is configured to drive the first and second drives so that the sea circle and the winding assembly 6 can be rotated according to the result of the rotation of the first drive pulley 20 about the first rotation axis Y. Partially surrounds pulleys 20 and 21.

According to a second variant of the first embodiment of the invention as shown in FIG. 8, the motor 18 is constituted together with the drive means 19 and the control means 16 for operating the sea rocket and take-up assembly 6. ) Is integrally coupled to the stationary support structure 2. In other words, in this embodiment situation, the sea roll and winding assembly 6 is to rotate independently of the stationary motor 18.

As can be seen in FIG. 8, the drive means 19 designed for rotationally actuating the sea circle and take-up assembly 6 are essentially relative to the central axis of rotation X of the cylinder 3 and the sea roll and take-up assembly 6. And a first tooth forming wheel 27 mounted to the drive shaft 18a of the motor 18 so as to rotate about the first parallel rotation shaft Z in parallel. The drive means 19 also includes a second toothed wheel 28 which lies essentially on the same plane as the first toothed wheel 27 and cooperates with the first toothed wheel. The fourth tooth-forming wheel 28 is integrally coupled with the sea roll and take-up assembly 6 such that it can rotate with the sea roll and take-up assembly 6 about the central axis of rotation X. As an alternative embodiment of the fully equivalent form, instead of the toothed wheels 27 and 28, a pair of pulleys connected by suitable drive belts may be provided. In more detail, the fourth toothed wheel 28 is unsealed and wound via suitable rolling means 28 operatively disposed between the fourth toothed wheel 28 and the stationary support frame 2. Fully support the assembly 6. Advantageously, the control means 16 further comprises a motor 29 of known type which is engaged with the stationary support frame 2 and the cylinder 3 at a predetermined angular velocity about the central axis of rotation X. It also includes a second drive means 30 operatively arranged between the motor 29 and the cylinder 3 of the knitting machine 1 so as to be rotatable.

In particular, the second drive means 30 comprise first and second drive pulleys 31, 32 lying on the same plane and operatively connected to each other by a drive belt 33. The first drive pulley 31 is mounted on a drive shaft 29a of the motor 29 and is a first axis of rotation that is essentially parallel to the center axis of rotation X of the cylinder 3 and the sea circle and take-up assembly 6. It can rotate freely about (B). On the other hand, the second drive pulley 32 is mounted on the corresponding drive shaft 34 together with the drive shaft 34 about the second rotation axis C which is basically parallel to the first rotation axis B. It is supposed to rotate.

The second and third drive means 30 also lie on the same plane, essentially parallel to the plane in which the first and second drive pulleys 31, 32 are placed, to cooperate to rotate the cylinder 3 to actuate. It also includes four toothed wheels 35 and 36. The third toothed wheel 35 is integrated with the drive shaft 34 so as to rotate about the second rotation shaft C together with the drive shaft 34 and the second drive pulley 32. The fourth toothed wheel 36 is integrally engaged with the cylinder 3 of the knitting machine 1 and engaged with the toothed wheel 35 so as to rotate the cylinder at a desired angular speed. The fourth drive pulley 36 is a cylinder 3 of the knitting machine 1 via suitable rolling means 36a operatively disposed between the fourth toothed wheel 36 and the stationary support frame 2. Partially supported.

According to a third variant of the first embodiment of the present invention as shown in FIG. 9, the control means 16 provides for the movement of the cylinder 3 of the knitting machine 1 and the sea area and the winding assembly 6 to the fixed type. Controlled and controlled by one motor 18 ′ integrally coupled to the support frame 2. In this case, the control means 16 is provided with first and second drive means 37 and 38, and the first and second drive means are the sea circle and the winding assembly in the second modification of the first embodiment. It is basically the same as the drive means 19 for rotating (6) and the second drive means 30 for rotating the cylinder 3. In this embodiment situation, both the first and second drive means 37, 38 are engaged on both sides of the drive shaft 18a ′ of the motor 18 ′ and use the movement of the drive shaft.

As is evident in this case, the first drive means 37 (or optionally the second drive means 38) can be operated manually or in order to vary the rotational speed of the sea zone and the winding assembly with respect to the speed of the cylinder. Or preferably a speed variable 41 which is automatically controlled by the electronic control unit 17. In order to reduce the number of reference numerals used to distinguish the constituent members of the knitting machine 1, the constituent members constituting the first driving means 37 are basically driven means of the second modification of the first embodiment. The same reference numerals as used in the description of (19) are given, and the constituent members constituting the second driving means 38 are basically the same reference numerals as used in the description of the second driving means 30. Was granted.

As can be seen clearly, the embodiments described with reference to the various drive means used to rotate the cylinder 3 and the sea zone and take-up assembly 6 are not intended to limit the invention in any way, Any other type of known driving device for rotating the sea-sea and wind-up assembly 6 is also conceivable, independent of the cylinder 3 of the loom 1.

The present invention has the following important advantages.

Firstly, the knitting machines and methods according to the invention make it possible to obtain high quality and high quality fabrics that do not undergo significant structural deformations in subsequent manufacturing steps. This is achieved by winding the fabric in anticipation of the subsequent natural torsional spiral of the fabric due to the internal tension of the fabric, thereby preventing subsequent deformation of the "right" wound fabric. Ultimately, it should be noted that the machines and methods according to the invention are not very complex and very inexpensive.

Claims (38)

A fabric winding method for winding up a fabric (4) manufactured by a cylinder (3) of a circular knitting machine (1) rotating about a central axis (X), Unsealing the fabric (4) made by the cylinder (4), A method of winding a fabric comprising winding the fabric (4) by rotationally actuating the winding and winding assembly (6) disposed on the cylinder (3) to wind and wind the fabric (4). And wherein the angular position of said sea roll and take-up assembly (6) changes with respect to said cylinder (3) during said step of winding said fabric (4). Method according to claim 1, characterized in that during the winding of the fabric (4) the sea circle and take-up assembly (6) are operated to rotate at an angular velocity different from the speed of the cylinder (3). Method according to one of the preceding claims, characterized in that during the winding of the fabric (4) the sea circle and take-up assembly (6) rotate in rotation independently of the cylinder (3). 2. The angular position of the sea cover and take-up assembly 6 with respect to the cylinder 3 in accordance with claim 1 in at least a predetermined angular position at every rotation of the cylinder 3 during the winding of the fabric 4. Fabric winding method comprising the step of biasing. Method according to one of the preceding claims, characterized in that the fabric (4) is wound directly as a tube. The method of any one of the preceding claims, further comprising the step of holding the tubular fabric (4) from the cylinder (3) before the winding of the fabric (4). Method according to one of the preceding claims, characterized in that the angular velocity difference between the cylinder (3) and the sea circle and take-up assembly (6) is given as a function of the twist rate of the tubular fabric (4). . The method according to any one of the preceding claims, further comprising the step of progressively cutting the fabric 4 along a predetermined cutting trajectory, before the fabric 4 is wound up. Fabric winding method. 9. The method of claim 8 wherein the cutting trajectory is inclined about the central axis of rotation (X). 10. The method according to claim 8 or 9, wherein the steps of unsealing the fabric (4) made by the cylinder, cutting the fabric (4), and winding the fabric (4) comprise: 6. A sea circle and take-up assembly 6 which is provided with cutting means 10 arranged to cut the tubular fabric 4 emerging from (3) and which is arranged on the cylinder 3 to seae and wind the fabric 4. And the cutting means (10) are rotated at a different speed than the cylinder (3). 11. The cutting means (10) according to claim 10, wherein the cutting means (10) is integrally coupled with the sea circle and take-up assembly (6) and can be operated independently of the cylinder (3) at a speed that can be different from the cylinder (3). Fabric winding method characterized in that. The method according to claim 8, wherein Holding the tubular fabric 4 emerging from the cylinder 4 prior to cutting the fabric 4, Branching the cut fabric 4 onto the lateral edge defined by the cutting operation; And unfolding the branched fabric (4) out before winding the fabric (4). 13. A method according to any one of claims 8 to 12, wherein the cutting of the tubular fabric (4) takes place along a cutting trajectory that is essentially spiral. 14. The cutting trajectory according to any one of claims 8 to 13, wherein the cutting trajectory comprises the torsion rate of the tubular fabric (4), the cylinder (3), the sea cover and winding assembly (6), and the cutting means (10). Fabric winding method characterized in that it is determined according to the difference in angular velocity between. In the fabric manufacturing method for producing a fabric (4) on a circular knitting machine (1), Rotating the rotating cylinder 3 so that the fabric 4 can be manufactured, Winding the fabric (4) through the method according to any one of the preceding claims. A support frame 2; A cylinder (3) coupled to the support frame (2), the cylinder (3) being rotated about a central axis of rotation (X) at a first angular velocity such that at least a tubular fabric (4) can be produced; A sea zone coupled with the support frame 2 and engaged with the tubular fabric 4 produced by the cylinder 3 to rotate about a central axis of rotation X at a second angular velocity so as to wind up the fabric; In the circular knitting machine including the winding assembly (6), And a means (16, 44) for varying the relative angular position between said sea roll and winding assembly (6) and said cylinder (3) during fabric winding. 18. The circular knitting machine according to claim 17, wherein the sea circle and take-up assembly (6) rotates about a central axis of rotation (X) at a second angular velocity different from the first angular velocity of the cylinder (3). 19. The circular knitting machine according to claim 17 or 18, characterized in that the sea circle and take-up assembly (6) rotates about a central axis of rotation (X) independently of the movement of the cylinder (3). 17. The device according to claim 16, wherein the means for changing the relative position (16, 44) comprises an intermittent offset device (45, 46) of mechanical form, wherein the intermittent biasing device comprises: 6) and the relative angle position between the cylinder (3) is biased to at least one rotation angle position of the cylinder. 20. The method according to any one of claims 16 to 19, wherein the second angular velocity of the sea roll and take-up assembly (6) is a minimum value less than or equal to the first angular velocity of the cylinder (3) and the first angular velocity of the cylinder (3). The circular knitting machine which can fluctuate between the above maximum values. 21. The method according to any one of claims 16 to 20, wherein the means for changing the relative angular position (16, 44) is cooperating with the sea voyage and take-up assembly to rotate the sea voyage and take-up assembly (6). Combined control means 16, characterized in that the control means 16 define the movement of the sea-crust and the winding assembly 6 in accordance with a predetermined relationship between the first and second angular velocities. Circular knitting machine. The control means (16) according to claim 21, wherein the angular velocity of the sea-crust and the winding assembly (6) can be adjusted according to the torsion rate of the tubular fabric (4) manufactured on the cylinder (3) of the circular knitting machine (1). And an electronic control unit (17) operably coupled to the circular knitting machine. 23. The apparatus according to claim 22, further comprising a torsion rate automatic detection means for automatically detecting a torsion rate of the tubular fabric (4) manufactured on the cylinder (3). A circular knitting machine, characterized in that it is operatively connected to 17). 24. The sea circle and take-up assembly 6 according to any one of claims 16 to 23, wherein the sea circle and take-up assembly 6 is coupled with the cylinder 3 via an interconnection means 23, the interconnection means being the sea circle and take-up. Optionally from a first operating condition in which the assembly 6 is integral with the cylinder 3, to a second operating condition in which the sea area and the winding assembly 6 move at a given relative angular velocity with respect to the cylinder 3 Circular knitting machine characterized in that it can be. 25. The method according to claim 24, wherein the interconnecting means comprises at least a first moving drive element (24) which rotates integrally with the cylinder (3) and at least a second moving drive element associated with the sea circle and take-up assembly (6). 25) and an auxiliary motor (26) acting on the second motion drive element (25). 26. The method of claim 25, wherein the first motion drive element 24 is a crown wheel that rotates integrally with the cylinder 3, and the second motion drive element 25 is the sea circle and winding assembly (26). And 6) a toothed wheel rotatably mounted on and operatively coupled to the crown wheel. 24. The motor according to any one of claims 16 to 23, wherein the control means (16) rotates the at least one motor (18) and the sea circumference and winding assembly (6) at a second angular speed. And a drive means (19) operatively arranged between the (18) and the sea-sea and take-up assembly (6). 28. The system according to claim 27, wherein the at least one motor (18) is integrally engaged with the sea-coil and take-up assembly (6) so as to rotate about the central axis of rotation (X) together with the sea-coil and take-up assembly (6). Circular knitting machine characterized in that it became. 28. The circular knitting machine according to claim 27, wherein the motor (18) is integrally coupled to the support frame (2). The method according to any one of claims 16 to 23, wherein the control means 16, A motor 18 'integrally coupled with the support frame 2; A first drive operatively disposed between the motor 18 'and the sea-coil and take-up assembly 6 such that the sea-coil and take-up assembly 6 rotates at a second angular velocity about the central axis of rotation X; Means 37; The cylinder 3 of the circular knitting machine 1 is operably disposed between the motor 18 'and the cylinder 3 of the circular knitting machine so that the cylinder 3 rotates at a first predetermined angular velocity about the central rotation axis X. Second drive means (38); Means 41 for varying a speed ratio for changing the rotational speed of the sea-cike and take-up assembly 6 and / or the cylinder 3 combined with the first drive means 37 or the second drive means 38. Circular knitting machine comprising a. 31. Cutting means (10) according to any one of claims 16 to 30, wherein the cutting means (10) is operatively associated with the sea-sea and winding assembly (6) for progressively cutting the tubular fabric (4) along a predetermined cutting trajectory. Also includes a circular knitting machine. 32. Circular knitting machine according to claim 31, characterized in that the cutting means (10) are configured to cut the fabric (4) along an orbit inclined about a central axis of rotation (X). 33. A circular knitting machine according to claim 31 or 32, characterized in that the cutting means (10) are integrally combined with the sea circumference and winding assembly (6). 34. The cutting device (10) according to any one of claims 31 to 33, wherein the cutting means (10) is symmetrically in a first position inclined with respect to the central axis of rotation (X) and in an opposite direction with respect to the central axis of rotation (X). At least a cutting element 10a which is at least moved between the inclined second positions, the cutting element 10a being a first variable gradually changing in accordance with the difference in angular velocity between the cutting means 10 and the cylinder 3. A circular knitting machine characterized in that shifted between an angular position and a second angular position. 35. A circular knitting machine according to claim 34, wherein said cutting means (10) can be switched between a plurality of said gradually changing operating positions. 36. Circular knitting machine according to claim 34 or 35, characterized in that the cutting means (10) can be manually switched between the operating positions. 36. The cutting device (10) according to claim 34 or 35, characterized in that the cutting means (10) can be manually switched between the first and second positions and is controlled and operated by the electronic control unit (17). Circular knitting machine. 38. The circular knitting machine according to any one of claims 31 to 37, wherein the cutting trajectory of the cutting means (10) is basically helical.

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