BE1027254A1 - Method for replenishing yarn supplies in a yarn supply device of a textile machine and a yarn supply device provided for this purpose - Google Patents

Abstract

This invention relates to a method for replenishing yarn supplies placed on spools at primary set locations (P1) - (P4) of a yarn supply device (100), wherein an unfilled spool (1) - (4) is moved to a secondary pitch (S1) - (S4), the yarn (21) is picked up from the moved bobbin (1) - (4), a new bobbin (1N) - (4N) is placed on the released primary pitch (P1) and the yarn ends (41b), (51a) of the yarn on the new bobbin (1N) - (4N) and the yarn on the moved bobbin (1) - (4). The invention also relates to a yarn supply device (100) provided for applying this method.

Description

This invention relates to a method for replenishing yarn supplies in a yarn supply device in which a plurality of yarn supplies in the form of bobbins wound on respective bobbin holders are placed at respective setting locations, while from these stocks of yarns are taken up by a machine for the pattern production of textile products, wherein replenishing a yarn stock means providing a new bobbin with a new yarn stock at a primary depot in the yarn stocking device.

The present invention also relates to a yarn supply apparatus for a machine for producing textile products in a pattern, in which a plurality of yarn supplies in the form of bobbins wound on respective bobbin holders are placed at respective positions.

In this patent application, the term "textile machine" is used to mean a machine for the pattern-based production of textile products.

The machine production of textile products often involves processing a large number of different yarns.

There must be a stock of each yarn, and the textile machine must be able to continuously take the yarn from that yarn stock as the production process progresses.

When textile products are produced that show a pattern, a drawing or a figure (such production is referred to in this patent application by the term "pattern-based production"), the yarn consumption is often irregular and also uneven for the different yarns.

As a result, a common yarn stock, such as for instance a warp beam, from which all warp yarns are released at the same speed, is in many cases not suitable.

Respective yarn supplies must then be provided for the different yarns, for example in the form of a bobbin where the yarn is wound up on a bobbin sleeve or a bobbin core and from which each yarn can be taken up separately by the textile machine.

For example, when multicolored weaving and tufting of carpet with cut pile or loop pile, large numbers of pile yarns of different colors must be supplied to the weaving or tufting device.

The consumption of these pile yarns depends on the design of the carpet and is therefore generally not uniform and not the same for every pile yarn in the fabric.

The yarn supply device must therefore contain a separate yarn supply for each different pile yarn.

It is known to achieve this in weaving machines by feeding the different yarns from respective bobbins which are rotatably arranged in a bobbin rack.

Because the yarns are pulled in the direction of the textile machine, the bobbins rotate so that the yarn is unwound.

Such a bobbin rack must often contain many thousands of bobbin.

Each bobbin has a respective set-up location, or in other words, a location where there is means for rotatably arranging the bobbin in a position of use for supplying yarn supply to the textile machine.

Also with other textile machines, such as certain tufting machines and knitting machines, such bobbin racks are often provided.

A drawback of the known bobbin racks is that they take up a lot of space in the vicinity of the textile machine.

Usually it is not possible to provide a bobbin rack for each yarn with a yarn stock that is sufficiently large for the entire production process.

Therefore, the yarn stocks must be replenished regularly.

To replenish a thread stock, each time the bobbin of which the thread stock is almost used up, must be removed from the bobbin rack and a new full bobbin with a new stock of the relevant thread must be placed in the vacant position of the removed bobbin, and the yarn running from the original bobbin to the fabric machine are cut, and the free end of the yarn running to the fabric machine tied to the end of the yarn on the new bobbin.

The yarn must therefore be introduced into a yarn guide and finally the tension must be put back on the yarn, for example by placing weights on it.

In order to have sufficient time for all these operations, in this method it is necessary to replace the bobbins before the yarn wound on it is completely used up.

This entails a lot of yarn loss.

It is true that the yarn that remains on different bobbins can be knotted together and reused, but then one has the disadvantage that the yarn has a relatively many knots.

When the textile machine is shut down to replenish the yarn supplies, this is very detrimental to the productivity and the overall profitability of the weaving machine.

Due to the irregular and uneven yarn consumption, it is also very difficult to work according to plan.

As textile machines continue to achieve higher production speeds, it also becomes increasingly difficult to replenish yarn supplies during the operation of the textile machine. With certain tufting machines, bobbin racks are provided where two equal bobbins with the respective yarn are provided in the bobbin rack per thread stock. These are non-rotating bobbins of which the yarn is unwound over the bobbin head. This makes it possible to provide a double yarn supply per yarn, so that for each yarn one can wait until the yarn from one of the two spools is used up and yarn is taken off from the second spool before replacing the empty spool with a new one. However, the disadvantage is that such a bobbin rack takes up twice as much space.

Another known yarn supply device is disclosed in EP 2 721 204 B1 and comprises separate yarn supply spaces in which loose yarn supplies are provided, a yarn loader being provided to connect an end portion of a yarn supply to an end portion of an external yarn supply and to transfer a quantity of yarn into said yarn supply space. , wherein the yarn to be added is first wound up on a winding body and then added in the wound-up state into the storage space. This known device makes it possible to automate the time-consuming and labor-intensive activities in the bobbin rack, but is not suitable in circumstances where greater yarn supplies in the form of bobbins wound on bobbin holders are preferred, for example to reduce the number of knots in the yarn. reduce. Economic considerations can also lead to a preference in certain circumstances, for example with a large number of different yarn supplies and a high yarn consumption rate, for a yarn supply device in which the yarn supplies are provided in the form of bobbins. An object of the present invention is overcome the above disadvantages by providing a method for replenishing yarn supplies provided in the form of bobbins wound on bobbin holders in a yarn stocking device, and by providing a yarn stocking device in which yarn stocks in the form of bobbins wound on bobbin holders be provided, with which the continuity of the production process of a corresponding textile machine can be guaranteed, which also allows to work very systematically when replenishing yarn stocks, so that any yarn loss can be avoided, thus reducing the number of knots in the yarn per fabricvery limited, and which moreover also permits a very compact construction of the yarn supply device.

These objects are achieved by providing, according to the present invention, a method for replenishing yarn supplies in a yarn supply apparatus in which a plurality of yarn supplies in the form of respective bobbins wound on bobbin holders are placed at respective primary set points, while yarns are taken up from these supplies by a machine for the pattern production of textile products, wherein replenishing a yarn stock means providing a new bobbin with a new yarn stock at a primary depot in the yarn stock device, and wherein, according to this invention, a yarn stock is replenished by a non- full bobbin containing the yarn supply to be replenished from its primary set-up location to a secondary set-up location in the yarn supply device so that the yarn can be taken up by the machine in operation further from this displaced bobbin, the new bobbin on the front the threaded primary set point, and connect a unwinding end of the yarn on the new bobbin to one end of the yarn on the moved bobbin so that, after the yarn has been taken up on the moved bobbin, the yarn continues from the new bobbin is recording.

The term "bobbin holder" is used in the sense of an article on which an amount of yarn can be wound, and on which the yarn wraps can be held so that it can act as a support for the yarn wraps.

It is preferably an elongated element such as, for example, a sleeve with a substantially cylindrical shape made of a light material such as, for example, plastic or cardboard.

The term "bobbin" refers to the thread stock wound on a bobbin holder.

The successive turns of a bobbin are wound concentrically with a common winding shaft on the bobbin holder.

Preferably, several layers of windings are also provided on top of each other, so that a bobbin comprises a substantially tubular whole of yarn windings, the inner side of which adjoins the bobbin holder and the outer side forms the outer surface of the bobbin.

A "full bobbin" is a bobbin that contains almost the entire initial thread stock or of which no thread or almost no thread has been taken.

A non-full bobbin is a bobbin from which a non-negligible portion of the initial yarn supply has already been taken.

A full bobbin and a non-full bobbin are distinguished from each other in that they have a different bobbin diameter or their volume.

For example, in a yarn supply device, when bobbins are provided which have a default starting diameter D, it can be determined that a bobbin is considered a full bobbin when the bobbin diameter is equal to the starting diameter D or is at least 95% of the starting diameter D.

A bobbin is then regarded as a non-full bobbin if the starting diameter is smaller than the starting diameter D, or smaller than 95% of the starting diameter D, respectively.

For example, it can also be determined that a non-full bobbin has a bobbin diameter that is less than 75%, preferably less than 50%. A typical starting diameter is about 320mm or 250mm or 200mm or intermediate dimensions.

A full bobbin and a non-full bobbin can be defined in an analogous way on the basis of a bobbin parameter other than the bobbin diameter, such as the volume taken up by the yarn or the weight of the bobbin, the length of the yarn that was removed from the bobbin. unwound or the yarn layer thickness on the bobbin, measured from the outside diameter from the bobbin holder.

For example, it can also be determined that an unfilled bobbin has a bobbin diameter where the remaining yarn layer thickness on the bobbin is less than 75%, preferably less than 50%, even more preferably less than 30% of the initial yarn layer thickness of the full bobbin.

In a highly preferred method, a non-full bobbin is defined as a bobbin having a diameter where the remaining yarn layer thickness is less than 10% of the initial yarn layer thickness, and for example even less than 5% of the initial yarn layer thickness.

The bobbin diameter at which the remaining amount of yarn has reached a certain percentage is approximately obtained by taking the stated percentage of the difference between the outer diameter and the inner diameter (the diameter of the bobbin holder) of the bobbin and then adding the diameter of the bobbin holder. count.

If the bobbin holder is a cylindrical element with diameter d1 and the bobbin has an initial outer diameter d2, then the bobbin diameter at which the remaining yarn layer thickness is still approximately 5% equal to: [(d2-d1) x 0.05] + d1.

A typical starting diameter of a bobbin is about 320mm or 250mm or 200mm or other dimensions that are between 200mm and 320mm.

A typical diameter for a cylindrical bobbin holder is about 78 to 82 mm.

In what follows, the term bobbin also refers to the entirety of the bobbin - the yarn stock - and the bobbin holder on which this yarn stock is wound.

In this patent application, the term 'depot' is understood to mean a space in the yarn supply device which is provided with means for setting up a bobbin therein in a position whereby the yarn supply present thereon can be fed to a textile machine and wherein the yarn supply, during operation of the textile machine, can be absorbed by this machine.

The terms 'primary depot' and 'secondary depot' are only used to distinguish between the two depots on which a bobbin can be placed, and do not indicate a different importance or a particular order of use of these depots, and can for example nor be considered as an indication of a greater or lesser length of time during which the bobbins would be placed on these primary and secondary depots.

A set-up place also preferably comprises holding means for holding a bobbin in a predetermined position in the yarn supply device, and guiding means for guiding the yarn from the bobbin placed in the set-up place to the textile machine.

When a set point is provided for unwinding the yarn from the bobbin, the holding means must be provided to hold the bobbin holder so that it is freely rotatable about its longitudinal axis.

The rotation is preferably done by the pulling force exerted on the yarn as it is taken up by the machine for the pattern production of textile products.

By "the available bobbin space at a depot," an expression further used in this patent application, we mean the space that can be occupied on the depot in question by a bobbin that is provided in a utilization arrangement as yarn stock.

The size of an available bobbin space can be expressed by the value (s) of one or more bobbin parameters that relate to the size and / or the volume of the largest possible bobbin that can be placed as yarn stock at that depot in a use setup. to become. Such a parameter is, for example, a size of the bobbin, such as the outer diameter and / or the length thereof, or the yarn layer thickness, or the volume that the bobbin takes up. Other bobbin parameters, such as for instance the weight of the bobbin, can also be such a parameter, if the volume or the size of the bobbin can be derived from them, whether or not in combination with other data. In the context of this patent application, such a parameter is preferably a bobbin parameter whose value changes as yarn is taken off the bobbin. A bobbin parameter whose value changes as thread is taken off the bobbin is hereinafter referred to as a "varying bobbin parameter."

In a bobbin where the yarn is wound in several layers on a bobbin holder, an outer dimension of the bobbin is such a "varying bobbin parameter". When the successive yarn wraps are wound around a common central winding axis so that the yarn volume has a substantially cylindrical outer shape, the outer diameter of the yarn volume on the bobbin - hereinafter referred to as bobbin diameter - is a varying bobbin parameter. When the yarn volume has an outer cylindrical shape with a longitudinally varying diameter or has a non-cylindrical outer shape, the largest outer diameter of the bobbin is, respectively, the largest transverse dimension of the bobbin in a direction perpendicular to the axis of the bobbin, a varying bobbin parameter. The length of the bobbin, measured according to the direction of its axis, can also be a varying bobbin parameter for a particular bobbin type. When two sets have respective available bobbin space of different size, this size difference can therefore be expressed as a ratio between on the one hand a bobbin parameter of the largest possible bobbin that can be placed on one installation site and on the other hand the same bobbin parameter of the largest possible bobbin of the same type that can be placed on the other site. The bobbin parameters mentioned in this section are preferably varying bobbin parameters. In that case, the said size difference can be expressed as a ratio between, on the one hand, a varying bobbin parameter of the largest possible bobbin that can be placed on one setting location and, on the other hand, the value that the same varying bobbin parameter of the same bobbin may have at most around this bobbin on the other. to be able to place a depot.

The above objects are also achieved by providing, according to the present invention, a yarn supply device for a machine for producing textile products in a pattern, in which a plurality of yarn supplies in the form of bobbins wound on respective bobbin holders are placed at respective primary positions, the yarn supply device according to this invention. The invention comprises, at least one secondary set-up location for placing an unfilled bobbin, displacing means which are provided to move an unfilled bobbin from its primary set-up location to a secondary set-up location, so that the yarn farther from this displaced bobbin passes through the machine. operation can be included, positioning means provided to place a new bobbin on the vacant primary setpoint, and connecting means provided to connect a unwinding end of the yarn present on the new bobbin to one end of the thread on the packaging. last bobbin present so that after the thread has been picked up on the moved bobbin, the yarn continues to be picked up from the new bobbin.

The said moving means comprise, for example, movably disposed holding means for keeping the respective bobbins in a position of use in the storage device, wherein the holding means are movable, for example mobile over a rail or some other guiding system, in order to move said holding means between a first location where the bobbin is placed on a primary depot and a second location where the bobbin is placed on a secondary depot. This movement can be done manually or can be fully or partially automated, for example by means of a movement means, such as a motor, which is controlled by a control signal generated by a central control unit when a sensor or monitoring device detects a relevant bobbin parameter, such as, for example, the bobbin diameter, has reached a certain threshold value at which the replenishment process must be started, the bobbin in question being automatically moved from the primary deposition to the secondary deposition by the movement means and any mechanism driven by it.

Said positioning means can be provided in an analogous manner for moving a full bobbin, for instance by means of movable holding means, either manually or at least partially automatically, from a bobbin stock to the vacant primary positioning place and to hold it there in a position of use.

Here, too, the automatic displacement can be realized with the aid of a movement means, such as a motor, which is controlled by a control signal generated by a central controller when a sensor or monitoring device detects that the relevant primary positioning place is free, whereby the relevant full bobbin is automatically moved by the movement means and any mechanism driven by it from its position in a bobbin stock to the released primary deposition.

A unwinding end of the yarn present on the new bobbin can be connected automatically or not to one end of the yarn present on the displaced bobbin by means of known yarn connecting means.

These yarn connecting means can also be operated completely manually.

After the yarn has been picked up on the repositioned bobbin, the yarn is picked up further from the new bobbin.

As a result, the thread on a bobbin that is being replaced is completely taken up and consumed by the textile machine before the thread is picked up from the new bobbin.

So there is not the slightest loss of yarn here.

Because unfilled bobbins can be moved to a secondary depot at a time of choice, it is also possible to work very systematically.

Continuity of the production process is guaranteed as there is always enough time for the last thread on a previous bobbin to be used up, even though a new full bobbin can be prepared.

Because the available bobbin space on the secondary depots must only suffice for the placement of non-full spools, these secondary depots can be smaller - have a smaller available bobbin space - than the primary depots where there must be sufficient available bobbin space for placing a full bobbin.

As a result, the entire yarn supply device can be of compact design.

Even if both a primary deposition and a secondary deposition are provided for each bobbin, the total volume of the yarn supply device is always less than double the total volume of a yarn supply device in which, for the same number of spools, only primary sets are provided.

A yarn stocking device according to this invention may even have a volume that is only 50%, preferably 30% or 20%, greater than the volume of a yarn stocking device in which only a primary set-up location is provided for the same number of spools.

A yarn supply device which only comprises the features of the following paragraph and does not include the other features of the above-mentioned yarn supply device, and is thus not provided with, inter alia, the said displacing means, positioning means and connecting means, is a first additional object of this patent application.

Said first additional article is a yarn supply apparatus for a machine for the pattern production of textile products, in which yarn supplies in the form of first bobbins wound on respective bobbin holders are placed on respective primary set locations, and in which one or more yarn supplies in the form of on respective bobbin holders wound second bobbins are placed at respective secondary set locations, wherein a unwinding end of the yarn on at least one first bobbin is connected to one end of the yarn on a respective second bobbin, the yarns being guided from the respective bobbins to a textile machine via guide means, so that the yarns are unwound from the first bobbins on yarn take-off and are unwound from the second bobbins in a substantially axial direction.

In such a yarn stocking device there are provided one or more pairs of two bobbins which are respectively placed on a primary and a secondary depot while their yarns are joined together so that together they form a continuous yarn stock. By unwinding the second bobbin of each pair in an axial direction in such a yarn supply device, the second bobbin can stand still during the further yarn take-off, making the yarn end of the yarn on the second bobbin easy and trouble-free with the yarn on the first bobbin of the pair. can be connected.

Such a yarn supply device is preferably a bobbin rack. The secondary deposition locations preferably have an available bobbin space that is smaller than the available bobbin space of the primary deposition locations.

A yarn supply device which comprises only the features of the following paragraph and does not include the other features of the above-mentioned yarn supply devices, and thus, inter alia, is not provided with the said displacement means, positioning means and connecting means, is a second additional subject matter of this patent application.

Said second additional article is a yarn supply apparatus for a machine for the pattern production of textile products, in which yarn supplies in the form of first bobbins wound on respective bobbin holders are placed at respective primary set locations so that their bobbin shafts extend in a first direction, and in which one or more multiple yarn supplies in the form of second bobbins wound on respective bobbin holders are disposed at respective secondary set locations so that their bobbin shafts extend in a second direction different from the first direction, with a unwinding end of the yarn on at least one first bobbin connected to a end of the yarn on a respective second bobbin.

In such a yarn stocking device there are provided one or more pairs of two bobbins which are respectively placed on a primary and a secondary depot while their yarns are joined together so that together they form a continuous yarn stock.

By placing the bobbins of each pair with their bobbin axes in mutually different first and second directions, the yarn stocking device can be made more compact than the existing yarn stocking devices with such a double yarn stock.

Such a yarn supply device is preferably a bobbin rack.

The secondary deposition locations preferably have an available bobbin space that is smaller than the available bobbin space of the primary deposition locations.

The features of this second additional article of the patent application can be combined with one or more features of the aforementioned first additional article of this patent application.

A yarn stocking device which only comprises the features of the following paragraph and does not include the other features of the above-mentioned yarn stocking devices, and thus, inter alia, is not provided with the said displacing means, placing means and connecting means, is a third additional subject of this patent application.

Said third additional article is a yarn supply apparatus for a machine for the pattern production of textile products, in which yarn supplies in the form of first bobbins wound on respective bobbin holders are placed on respective primary set points, and in which one or more yarn supplies in the form of on respective bobbin holders are placed on respective bobbin holders. wrapped second bobbins are placed at respective secondary set locations so that the bobbin shafts of the first and second bobbins extend in the same direction, with an unwinding end of the yarn on at least one first bobbin connected to one end of the yarn on a respective second bobbin , and wherein the secondary set points have an available bobbin space that is less than the available bobbin space of the secondary set points. Preferably, the available bobbin space at the secondary depots is at most 50% of the available bobbin space at the primary depots.

Preferably, yarn guiding means are provided which are positioned such that the first bobbins and the second bobbins are unwound in a substantially axial direction. The features of this third additional article of the invention may be combined with one or more features of the aforementioned first additional article of this invention.

All of the features of these first, second and third additional articles of this patent application can be combined with any combination of one or more compatible features of the yarn stocking device further indicated in this description and in the claims.

In a preferred method, the yarn supply device is provided to unwind the machine-picked yarn from each bobbin placed on a primary set-up location, and to unwind from each bobbin placed on a secondary set-up in a substantially axial direction from the bobbin.

By 'unwinding yarn from a bobbin in a substantially axial direction' in this patent application it is meant that the yarn is unwound from the bobbin by pulling it from the bobbin in a direction (hereinafter referred to as 'the drawing direction') corresponding to, or a forms an acute angle with the direction of the winding axis of the bobbin, so that the successive turns thereby, during the yarn take-off, are drawn over one end of the bobbin, while the bobbin is not caused to rotate by this pulling force. The said pulling direction is preferably determined by a yarn guiding element, the yarn extending substantially rectilinearly from the bobbin to the yarn guiding element.

The yarn guide element is preferably positioned such that the yarn is guided from the bobbin to a location substantially coincident with the extension of the axis of the bobbin.

By 'unwinding yarn from a bobbin' in this patent application it is meant that the yarn is unwound from the bobbin holder by pulling it from the bobbin in a direction corresponding to, or at an acute angle to, a direction perpendicular to the winding axis. of the bobbin.

The yarn hereby exerts a force on the bobbin surface, causing the bobbin to rotate.

The yarn wraps are thus unwound from the bobbin.

Here too, the drawing direction is preferably determined by a yarn guiding element, the yarn extending substantially rectilinearly from the bobbin to the yarn guiding element.

In an arrangement where the yarn is unwound from the bobbins (a thread take-off from a bobbin that is referred to by the technical term “déroulé”), the bobbins rotate during the yarn take-off.

The fact that the bobbins can be moved to a depot where they do not have to rotate but can stand still during the further yarn take-off (a yarn take-off from a bobbin designated by the technical term “défilé”) makes this method easier to perform.

In a highly preferred method of this invention, the yarn supply device is provided to hold the bobbins at their respective primary sets and at their respective secondary sets in a position with their bobbin axes extending in the same direction, and includes at least one yarn guiding device around the to guide yarn in a direction from a bobbin on a secondary setpoint where it is unwound in a substantially axial direction from this bobbin by a pulling force in the yarn on yarn takeoff and to guide the yarn from a bobbin on a primary setpoint in a direction whereby it is unwound from this bobbin by a pulling force in the yarn when the yarn is taken off.

Preferably, for each set of a primary set point and an associated secondary set point, a yarn guiding device is provided which comprises at least one yarn guide, and this yarn guiding device is provided to guide the yarn from the bobbin at the secondary set point in such a way that it is fed into the yarn is unwound from this bobbin on yarn take-off in a substantially axial direction, and so as not to guide the yarn from the bobbin at the primary setting point so that it is unwound by a pulling force in the yarn on yarn take-off from this bobbin. In a particularly preferred method, each yarn guiding device comprises for each set of a primary and a secondary set point at least one associated yarn guide and the yarn supply device is arranged such that, when replenishing a yarn supply, the yarn follows a first yarn path from a displaced bobbin on a secondary position to an associated yarn guide and thereby unwinds in a substantially axial direction from this displaced bobbin, and, after all the yarn has been removed from the displaced bobbin, runs along a second yarn path to the associated yarn guide, and each yarn guide is provided to to stop guiding of the yarn as a result of this change in the yarn path, and as a result of stopping this guide the yarn follows a third yarn path in which the yarn is further unwound from said new bobbin.

The yarn supply device is then preferably provided to hold the bobbins at their respective primary set point in a position where their bobbin axis lines extend in a first direction, and to hold a bobbin at at least one secondary set point in a position where said bobbin axis extends in a second direction different from the first direction. The first direction and the second direction are preferably not parallel to each other. In a special method the first and the second direction are substantially perpendicular to each other.

In an alternative method, the yarn supply device is preferably provided to unwind the machine-picked yarn from each bobbin placed on a primary set-up and from each bobbin placed on a secondary set-up in a substantially axial direction from the bobbin. In such a yarn supply device, the yarn is unwound axially from the bobbin (in "défilé") both at the primary set points and at the secondary set points.

In another preferred method, a respective secondary set-up location is provided for each bobbin in the yarn supply device. A secondary deposition location is hereby available at any time for each bobbin, so that each bobbin in the yarn supply device can be moved to a secondary deposition at any time.

It is also possible to provide a yarn supply device in which the number of secondary settlements is less than the number of primary settlements.

This of course makes it possible to make the yarn supply device more compact.

However, moving a bobbin can only take place if there is at least one secondary depot that is not already occupied by another bobbin.

In a most preferred method, a yarn stocking device is provided in which the available bobbin space at each secondary depot of the yarn stocker is less than the available bobbin space at each primary depot.

This is made possible because the available bobbin space at the secondary depots must only suffice for the placement of non-full bobbins.

Such a yarn supply device can be designed in a particularly compact manner, while the continuity of the production is guaranteed without yarn loss.

The available bobbin space on the secondary depots is then, for example, at most 75% or more preferably at most 50%, or even more preferably at most 35% of the available bobbin space at the primary depots.

In a particular method, a yarn supply device is provided which comprises at least two secondary depots, and at least two yarn supplies are replenished simultaneously.

Preferably, the empty bobbin holder is removed from the displaced bobbin during this process after the yarn has been taken up on the displaced bobbin.

In a particularly preferred method, use is made of a yarn supply device with a monitoring device that determines from at least one bobbin, repeatedly or permanently, a respective bobbin parameter proportional to the length of the yarn present on the bobbin, and the yarn stock present on a bobbin is measured. supplemented when the respective bobbin parameter has reached a predetermined threshold value.

A bobbin parameter is a parameter that is a measure of the size of the thread stock remaining on a bobbin.

This is for example the bobbin diameter, the thread layer thickness or the volume occupied by the bobbin or the weight of the bobbin.

When the approximate length of the yarn on a full bobbin is known, the length of the yarn picked up from that bobbin is also a bobbin parameter from which the size of the remaining yarn supply can be derived.

A bobbin parameter can be determined by means of one or more sensors and / or by image analysis via an image recording device.

The length of the spent yarn can be determined, inter alia, by guiding the yarn over a rotation element that rotates while and as the yarn travels over it, so that the length of the spent yarn can be derived from the number of rotations that have been made since the beginning of the yarn take-off by the rotating element was performed.

The yarn supply apparatus of this invention preferably includes at least one secondary set up location where the available bobbin space is less than the available bobbin space at the primary set locations.

More preferably, the yarn supply device of this invention comprises at least one secondary set-up location where the available bobbin space is less than the average available bobbin space of all primary set-up locations of the yarn supply device.

The yarn supply apparatus of this invention is preferably arranged to unwind the yarn taken up by the textile machine from each bobbin placed on a primary set-up location, and to unwind from each bobbin placed on a secondary set-up location in a substantially axial direction from the bobbin.

The fact that the spools can be moved to a depot where they do not have to rotate (“déroulé”) but can stand still during the further yarn removal (“défilé”) makes it easier to replenish yarn stocks.

The yarn supply device is provided, in a highly preferred embodiment, for holding the bobbins at their respective primary sets and at their respective secondary sets in a position where their bobbin axes extend in the same direction, and includes a yarn guiding device for moving the yarn from a bobbin onto to guide a secondary deposit in a direction in which it is unwound by a pulling force in the yarn on thread take-off in a substantially axial direction from this bobbin, and to guide the yarn from a bobbin at a primary deposit in a direction where it is unwound by a pulling force is unwound in the yarn when this bobbin is taken off.

Because the reels are placed with parallel axes on the primary and secondary depots, moving the reels is easy. This also simplifies the construction of the yarn supply device, with the secondary setting points being located in the free spaces between the primary setting points. Torsion of the yarn at the junction of the yarn of the new bobbin and the yarn of the displaced bobbin is avoided by unwinding the yarn on the displaced bobbin in defile. The yarn guiding device ensures that the transition from yarn take-off from the moved bobbin to yarn take-off from the new bobbin is smooth.

A particularly preferred embodiment is obtained when the yarn guiding device comprises for each set of a primary and a secondary set-up location at least one associated yarn guide, and the yarn supply device is arranged such that, when replenishing a yarn supply, the yarn follows a first yarn path from a displaced bobbin. runs at a secondary deposition to the associated yarn guide and thereby unwinds in a substantially axial direction from this displaced bobbin, and, after all yarn has been taken off the displaced bobbin, runs a second yarn path to an associated yarn guide, and each yarn guide is provided to stop the guiding of the yarn as a result of this change of the yarn path, and the yarn as a result of the stopping of this guiding follows a third yarn path with the yarn being further unwound from said new bobbin. In addition, it is preferred to provide the yarn supply device such that the bobbins at their respective primary set-up location are held in a position with their bobbin axes extending in a first direction, and that a bobbin is held in position at at least one secondary set-up location. wherein said bobbin axis extends in a second direction different from the first direction. The first direction and the second direction are preferably not parallel to each other. In a special embodiment, the first and the second direction are substantially perpendicular to each other.

The yarn supply device may also be provided for unwinding the yarn taken up by the machine from each bobbin placed on a primary set-up location and from each bobbin placed on a secondary set-up location in a substantially axial direction from the bobbin.

In such a yarn supply device, the yarn is unwound axially from the bobbin (in "défilé") both at the primary set points and at the secondary set points.

The supply apparatus preferably includes a first series of primary locating locations for juxtaposing a plurality of first coils in a position with their axes extending transverse to the direction of travel, and a second series of primary locating locations for placing on a parallel second row adjacent to each other. placing a plurality of second bobbins together in a position having their axis lines transverse to the direction of travel, the first row of bobbins and the second row of bobbins being parallel to each other with a horizontal spacing so as to form a gap, the yarn supply device extending into the said spacing series of secondary settlements for placing unfilled first coils and unfilled second coils in a position where their axis lines are transverse to said direction of travel, and wherein the secondary settlements are arranged so that the unfilled bobbin an intermediate line running in the direction of travel j shapes in which the successive non-full bobbins are located one after the other in the direction of travel.

The consecutive unfinished bobbins of the intermediate row can be located alternately substantially to the left and substantially to the right of the vertical symmetry plane of the interspace, and alternately be provided as a secondary setting place for a first bobbin and as a secondary setting place for a second bobbin.

Preferably, a respective secondary set-up location is provided for each bobbin in the yarn supply device.

The number of secondary depots in the storage device can also be smaller than the number of primary depots.

In a highly preferred embodiment of the yarn supply device according to this invention, the available bobbin space at each secondary deposition location of the yarn supply device is less than the available bobbin space at the primary deposition locations, preferably at most 75%, more preferably at most 50%, even more preferably at most 35% of the available bobbin space on the primary depots.

If not all primary pitches have the same available bobbin space, the expression “the available bobbin space at the primary pitches” can be interpreted as “the average available bobbin space of the primary pitches of the yarn stocking device”. In the most preferred embodiment, the yarn supply device is a bobbin rack and the machine is a weaving machine or a tufting machine or a knitting machine.

The yarn supply device of this invention can be provided with a device that allows at least some of the yarns going to the textile machine to interact with a yarn tensioning device. The yarn tensioning device may be provided to control the yarn tension of each yarn individually and is, for example, a yarn tension system according to the patent WO 2017/077454 A9, which comprises a rotatable brake roll around which one or more yarns are at least partially wrapped to keep them under tension, and includes a motor for providing torque to the brake roll, said motor being controllable in regenerative operation to maintain the yarn under tension. By having a motor deliver an adjustable torque to the brake roller, it is easier to respond to deviating and / or changing properties of yarns and / or a change in the yarn trajectory and / or changes in the production process of the textile machine. By driving the motor in the opposite direction in motor operation, yarn can be recovered, which may be necessary due to the shed formation. Such a yarn tension system further preferably also comprises measuring means for determining the length of the yarn taken off by the textile machine.

For each brake roller, the length of a yarn held under tension by this brake roller can thus be calculated from the number of revolutions of the brake roller or the angular rotation of the motor and the diameter of the brake roller without the need for additional length measuring sensors. When the length of the yarn is calculated in this way, the said measuring means comprise the necessary calculation means for this purpose.

This measurement and / or calculation of the used yarn or of the yarn still present in a yarn stock can be used to control means to generate a warning signal that indicates that a yarn stock must be replenished, or to generate a control signal that one or more controls more means which automatically implement one or more steps of the method according to the present invention and which, for example, form part of the above-mentioned monitoring device.

The invention will now be further elucidated on the basis of the following more detailed description of a possible embodiment of a yarn supply device according to the present invention and of a possible method for replenishing the yarn supplies in such a yarn supply device. It is emphasized here that the device and method described are only examples of the general principle of the invention and can therefore in no way be regarded as a limitation of the scope of the protection, nor of the scope of the invention.

In this detailed description reference is made by reference numerals to the accompanying figures, of which. Figure 1a represents a schematic side view of a bobbin rack with bobbins according to the present invention placed at primary and secondary set points and a weaving machine which is supplied from this bobbin rack; . Figure 1b represents a front view of a portion of the bobbin rack of Figure 1 on which no bobbin has been placed; . Figure 1c is the front view of Figure 1b showing the primary and secondary depots; . Figure 2 is a schematic side view of a portion of a bobbin rack according to the present invention with bobbin placed at primary and secondary depots; 20. Figure 3 is a perspective view of the portion of the bobbin rack shown in Figure 2; . Figures 4a to 4e each show in perspective the portion of the bobbin rack shown in Figures 2 and 3, the consecutive drawings showing five consecutive situations during the replenishment of the yarn supply of the bobbin located at the top left according to this invention; and . Figure 5 shows in perspective a schematic representation of a part of a bobbin rack with two horizontal rows of 8 primary set points each on which full bobbins are placed and, to the right of these rows, four secondary set points on which unfilled bobbins are placed. . Figure 6 shows in perspective a schematic representation of a part of a bobbin rack with two horizontal rows of 8 primary set positions each on which full bobbins are placed and two intermediate rows of 8 secondary set points each on which unfilled bobbins have been placed;

Figure 7 is a perspective view of a portion of the bobbin rack of Figure 6 with four full bobbins at respective primary sets and four unfilled bobbins at respective secondary sets;

10. Figures 8a to 8h are perspective views of the portion of the bobbin rack shown in Figure 7, the successive figures showing the different steps in replenishing a yarn supply;

. Figure 9 shows in perspective a schematic representation of a part of a differently designed bobbin rack in which, at different levels, parallel horizontal rows of primary depots are provided and wherein, in a space between these rows of primary depots, a series of secondary depots are provided, and wherein the bobbins on the primary depots and the bobbins on the secondary depots have parallel axes;

. Figure 10 represents a top view of the bobbin rack shown in Figure 9;

20. Figures 11a to 11h are perspective views of the bobbin stretch shown in Figures 9 and 10, the successive figures showing the different steps in replenishing a yarn supply;

The double-piece weaving machine (101) shown in Figure 1a is equipped for producing two pile fabrics simultaneously.

This weaving machine includes two warp yarn trees

(102), (103) on which the backing warp yarns (104), (105) for forming the two backing fabrics are provided and run to the weaving machine (101).

For pile formation on these pile fabrics, a large number of differently colored pile warp yarns (21) are required.

For each of these different pile warp yarns (21) there is provided in a bobbin rack (100) a yarn supply in the form of a bobbin (1), (2), (3), (4) wound on a bobbin holder.

From these bobbins the necessary yarns (21) run via guide means to the weaving machine (101) where they are positioned by means of a jacquard device (106) with respect to the levels at which weft yarns (not shown) are inserted by means of grippers (not shown).

For the sake of clarity of the drawing, only a limited number of the many bobbins (1), (2), (3), (4) have been drawn in the bobbin rack (100), and only a limited number have been weaving machine running pile warp yarns (21).

Figures 1b and 1c show a portion of the bobbin rack (100) of Figure 1a without the bobbin.

The bobbin rack (100) comprises a support structure composed of a number of vertical support profiles (30).

Rotatable bobbin carriers (33) are attached to these carrier profiles (30).

Each bobbin carrier (33) is provided to carry a bobbin (1) - (4), (1N) - (4N) in a position of use where it acts as a yarn supply for the weaving machine (101) and allows the yarn to unwind from the bobbin while the bobbin rotates on its axis.

Each bobbin carrier (33) thus forms a primary deposition (P1) - (P4) or a secondary deposition (S1) - (S4) for a bobbin (see Figures 1b and 1c) Around each bobbin carrier (33) there is a space available that can be occupied by a bobbin, the so-called 'available bobbin space'. In Figure 1c this available bobbin space is indicated for the primary (P1) - (P4) and for the secondary positioning locations (S1) - (S4) by means of a hatched circle.

At these set points (P1) - (P4), (S1) - (S4) the size of the available bobbin space can be indicated on the basis of the diameter (D), (d) of the largest possible bobbin that is a user setup can be placed as a yarn stock.

The size of the available bobbin space on the primary depots (P1) - (P4) is determined by a diameter (D) that is much larger than the diameter (d) which determines the size of the available bobbin space on the secondary depots (S1) - (S4). The ratio of, on the one hand, the size of the available bobbin space at the secondary setting points (S1) - (S4) and, on the other hand, the size of the available bobbin space at the primary setting points (P1) - (P4), is therefore the ratio d / D of the said diameters and is approximately 40% in the embodiment shown in Figures 1a, 1b and 1c.

In the bobbin rack (100), the bobbin carriers (33) and the associated yarn guiding means (31) are provided on both the primary set points (P1) - (P4) and on the secondary set points (S1) - (S4) so that the yarn of the bobbins (1) - (4) can be unwound and can be guided via the yarn guiding means (31) to the weaving machine (101).

The available bobbin space at the primary set points (P1) - (P4) is such that full bobbin (1) - (4) with a standard bobbin diameter (D) can be placed.

A number of commonly used standard bobbin diameters are between 20 cm and 25 cm, for example 20 cm, 22 cm or 24 cm.

In exceptional cases, the bobbin diameter can be larger and be between 25 cm and 32 cm.

At the secondary depots (P1) - (P4) there is insufficient space for placing full bobbins (1) - (4) with a standard bobbin diameter (D), but non-full bobbins can be placed provided that their outside diameter (d) is at most 40% of the standard bobbin diameter (D). In the bobbin rack (100) shown in Figures 1a and 1b, an associated secondary depot (S1) (-S4) is also provided for each primary (P1) - (P4) deposition location.

In the bobbin rack of figure 1a, unfilled bobbins (1), (2), (3), (4) have been placed at all secondary set points (S1) - (S4).

Because more than half of the yarn volume of those bobbins has already been taken off by the weaving machine (101), said bobbins have an outer diameter (d) which is at most 40% of the standard diameter of the full bobbins.

A full bobbin (1N), (2N), (2N), (4N) has been placed on each associated primary pitch (P1) - (P4) with a new supply of the appropriate yarn.

These full bobbins have a bobbin diameter that is almost equal to the standard diameter (D). The unfinished bobbins (1), (2), (3), (4) and the full bobbins (1N), (2N), (3N), (4N) are arranged so that their axes are parallel to each other. and extend substantially perpendicular to the plane of the bobbin stretch (100).

Preferably, however, the bobbin shafts are inclined slightly upward in the direction of the free end of the bobbin.

The coils are then better restrained on their support rods by the acting gravity.

In an alternative embodiment of the bobbin rack (see Figures 2 and 3), it comprises a number of primary set points (P1) - (P4) where respective full bobbin (1N) - (4N) with bobbin shafts (A1) running in a first direction (R1) - (A4) can be placed on first support rods (not visible in the figures) with their bobbin axes (A1) - (A4) extending horizontally and parallel to each other in a first direction (R1) which is perpendicular to the plane (V) which is determined by the support structure (30) of the bobbin rack (100). The bobbin rack (100) includes for each primary pitch (P1) - (P4) a secondary pitch (S1) - (S4) where respective unfilled bobbin (1) - (4) with bobbin shafts running in a second direction (R2) (B1) - (B4) can be placed on second support rods (not visible in the figures), their bobbin shafts (B1) - (B4) extending in a second direction (R2) forming an acute angle (a) in a horizontal plane ) with the plane (V) defined by the support structure (30) of the bobbin rack (100). Each secondary depot (S1) - (S4) is located diagonally above the associated primary depot (P1) - (P4). The first support bars and the second support bars are attached to the support structure (30) and extend substantially perpendicular to the said plane (V). The bobbins (1N) - (4N), (1) - (4) each contain a yarn stock in the form of multiple layers of longitudinally abutting yarn coils which are placed on respective hollow cylindrical bobbin cases (H1-H4), (H1N- H4N) are wound with a common winding shaft that coincides with the bobbin shaft.

Together, the yarn wraps form a volume of yarn (40) having a generally cylindrical outer shape with an outer diameter (D), (d) that decreases as more yarn is unwound or unwound from the bobbin.

From each bobbin (1) - (4), (1N-4N) the yarn is fed to the weaving machine (101), each yarn passing through a respective tube (31), also called 'tubing', which is attached to the support structure (30) is confirmed.

Figures 2 and 3 do not show the yarns running to the weaving machine (101).

As the production process of the weaving machine progresses and depending on the weaving pattern, yarn is removed from the bobbins.

For the bobbins (1N) - (4N) placed on the primary setting locations (P1) - (P4) with their bobbin shafts (A1) - (A4) in the first direction (R1), the yarn is unwound tangentially.

Due to the force with which the yarn is pulled towards the weaving machine (101), these bobbins are rotated about their bobbin axis.

Such a removal of yarn from a bobbin is also referred to by the technical term "déroulé".

The bobbins (1) - (4) placed on the secondary set points (S1) - (S4) with their bobbin shafts (B1) - (B4) in the second direction (R2) are oriented so that the yarn in a substantially axial direction is drawn over the bobbin end (or over the bobbin head) and is thus unwound from the bobbin without the bobbin rotating. Such a removal of yarn from a bobbin is also referred to by the technical term "défilé". Figures 4a to 4e each show the part of the bobbin rack (100) shown in Figure 3, in successive situations during replenishment of a yarn supply according to a preferred method according to the present invention. According to this method, when a yarn supply on a bobbin has reached a minimum threshold where the bobbin diameter (d) is only 40% of the standard starting diameter (D) of a full bobbin, it is determined that this yarn stock can be replenished. This can be visually determined by an operator. However, a monitoring device (not shown in the figures) may also be provided, in conjunction with an image recording means (e.g. a camera) and / or one or more sensors that monitor the bobbin diameters of the various bobbin, said monitoring device being programmed to, when the minimum threshold of a bobbin diameter is reached, to generate a warning signal indicating that the relevant thread stock can be replenished and / or to generate a control signal with which the aforementioned components of an automatic filling device are controlled to automatically replenish the relevant thread stock .

The bobbin (1), which in figure 4a is located at the top left of a primary setting place (P1), comprises a yarn supply, the yarn (41) of which is guided via a guide tube (31) to the weaving machine (101). This bobbin has a bobbin diameter (d) that is only 40% of the starting diameter (D) and is therefore in the situation described above where the minimum threshold has been reached so that it is determined - by an operator and / or a monitoring device - that this yarn stock is refillable.

As a result of this determination, in a next step of the method, the respective bobbin (1) whose supply of yarn (41) is replenished is moved to the holding means (not shown in the figure) of the secondary deposition point (S1) associated with the primary depot (P1) from which the bobbin (1) comes. The situation where the bobbin has been moved is shown in figure 4b. The yarn taken from this bobbin (1) is still guided via the guide tube (31) to the weaving machine (101). Now, however, the yarn (41) is no longer unwound from the bobbin (1), but is unwound over the bobbin end without the bobbin (1) rotating.

This displacement of the bobbin (1) can also be realized automatically by means of displacement means in another method with a differently designed bobbin stretch.

For example, each bobbin is carried by a carrier movable by a drive motor on a guide rail to move the bobbin from the above-indicated position on a primary pitch to the above-indicated position on a secondary pitch, the drive motor being provided to move the carrier. automatically moved to the secondary depot (S1) after its actuation by means of a control signal generated by said monitoring device.

As soon as the bobbin (1) has been moved, a new full bobbin (1N) with a new stock of thread of the relevant yarn type is placed on the primary setting point (P1) that has become available as a result.

The end (41b) of the yarn (41) on the displaced bobbin (1) is therefore connected to the unwinding end (51a) of the yarn (51) on the new bobbin (1N). The joined yarn ends (41b), (51a) and the joint itself are enlarged and indicated schematically in Figures 4c and 4d.

The situation after placing the full bobbin (1N) and after connecting the yarns (41), (51) is shown in figure 4c.

Because both the new bobbin (1N) and the moved bobbin (1) are stationary, the connection of the yarns can be carried out easily and the further yarn take-off from the moved bobbin (1) is prevented from causing torsion in the between the two bobbin (1) , (1N) standing yarn.

During the weaving process, the weaving machine further takes the yarn (41) from the displaced bobbin (1) and continues to do so until all of the yarn (41) has been removed from this bobbin (1).

This means that there is not the slightest loss of yarn.

Because the end (41b) of the yarn on the moved bobbin (1) is connected to the unwinding end of the yarn (51) on the new bobbin (1N), the yarn from the new bobbin (1N) is automatically pulled in the direction of the weaving machine and the yarn (51) is automatically unwound further from the new bobbin (LN).

This yarn removal now takes place tangentially again by rotating the bobbin (1N). The yarn (51) taken from this bobbin (1N) is still guided via the guide tube (31) to the weaving machine (101).

Figure 4d shows the situation at the moment when the last yarn has been unwound from the displaced bobbin (1) and the yarn (51) from the new bobbin is entrained by the yarn connection (41b, 51a). In the above-mentioned other method with a differently designed bobbin stretch, the placement of a new bobbin (LN) on the vacant primary set point (P1) and the connection of the yarn ends (41b, 51a) can also be realized automatically by means of positioning means and connecting means of an automatic replenishment device. The placing means then comprise, for example, means for moving a full bobbin from a bobbin stock to the bobbin rack and placing it in the correct position on the released primary positioning place. For this purpose, these positioning means can comprise, for example, analogous to the displacement means described above, a carrier which is displaceable by a drive motor on a guide rail in order to move the bobbin from the bobbin stock to the vacant primary deposition, wherein the drive motor is provided to automatically move the carrier to the to move the primary depot after control by means of a control signal, for instance after it has been determined by image detection and / or a sensor that the primary depot is free.

The bonding of the yarn ends (41b), (51a) can also be realized automatically by means of known bonding means for automatically bonding yarns. These connecting means can also form part of a replenishment device.

As the last step of the method, the empty sleeve (H1) is then removed from the displaced bobbin (1) in order to free this secondary set-up place (51) for the next replenishment of the respective yarn. It goes without saying that the removal of this empty sleeve (H1) can also be automated, for instance by means of controllable pushing means which form part of the above-mentioned filling device.

In Figure 5, a portion of another embodiment of a bobbin rack (100) is shown. The bobbin rack (100) also comprises a support structure composed of vertical support profiles (30) and attached bobbin supports (not visible) for placing bobbins (1N) - (8N) in horizontal rows one above the other on primary depot positions with their bobbin axes (A1) ) - (A8) horizontally parallel to each other and perpendicular to the plane (V) of the bobbin rack (100).

The yarns are guided from the bobbins via respective guide tubes (31) to the weaving machine (101).

However, this bobbin rack (100) does not have a secondary depot for every primary depot.

For each horizontal row of eight primary depots, only two secondary depots are provided on the right side of this row.

At these two secondary set points per row, the respective bobbin (1), (8) are arranged so that their bobbin axes (B1), (B8) are in parallel vertical planes and sloped to the left from the bottom end to the top end walk towards it.

The available bobbin space on the secondary depots is here 50% of the available bobbin space on the primary depots.

The bobbin diameter (d) of the bobbins on the secondary depots can thus be at most 50% of the bobbin diameter (D) of the largest possible full bobbins (1N) - (8N) that can be placed on the primary depots.

With such a bobbin stretch (100), therefore, per horizontal row of eight bobbins only two bobbins can be moved to a secondary depot at the same time, so that only two yarn supplies per row of bobbins can be replenished at the same time according to the method according to the present invention.

The yarn stocks of the spools of the same row can therefore be replenished in successive turns of at most two yarn stocks at a time.

Because the available bobbin spaces on the secondary depots can be much smaller than the available bobbin spaces on the primary depots, such a bobbin rack with a limited number of secondary depots must be only slightly larger than a bobbin rack that only has primary depots, while the presence of the secondary depots offers the advantage that yarn stocks can be replenished more systematically, without yarn loss and without any interruption to the production process of the textile machine.

In an alternative embodiment, the bobbin rack (100) comprises a plurality of horizontal rows of primary set points with an intermediate horizontal rows of secondary set points each time between each two rows. On the part of the bobbin rack shown in figure 6, part of two horizontal rows with 8 primary positions each and part of two intermediate horizontal rows with 8 secondary positions each can be seen. A respective full bobbin (1N) - (8N) is placed on each primary set-up place and a bobbin (1) - (8) is placed on each secondary set-up place which only contains a small amount of yarn.

The diameter (d) of these unfilled bobbins (1) - (8) is, for example, about 35% of the diameter (D) of the full bobbins (1N) - (8N). The bobbin rack (100) comprises a support structure composed of vertical support profiles (30). The bobbins (1) - (8), (1N) - (8N) sit on support rods (not visible in the figures) which are attached to these support profiles (30) and extend from these support profiles practically perpendicular to the plane (V) of extend the bobbin rack (100) but slightly upwardly inclined toward their free end. Each primary set point with a full bobbin (1N) - (8N) has an associated secondary set point for an unfilled bobbin, with the unwinding end (the leading end) of the yarn connected to the full bobbin (1N) - (8N) with the back end of the thread still on the unfilled bobbin (1) - (8).

Furthermore, for each pair of a primary set-up location and an associated secondary set-up location, there is also provided a guiding device (42) comprising a yarn eye (43) and a yarn clamp (44). Its function is clarified by the description of the successive situations in replenishing a yarn supply of this bobbin rack, with reference to Figures 8a to 8h.

Figure 7 shows a smaller portion of the bobbin stretch (100) of Figure 6, with four full bobbins (1N) - (4N) and four unfilled bobbins (1) - (4). Figure 8a shows a situation in which the yarn stock of the bobbin (1) at the primary set-up point at the top left has to be replenished because the remaining yarn amount has reached a certain minimum threshold.

For this purpose, this bobbin is moved in a first step to the associated secondary setting place at the top left (see fig. 8b) so that the yarn is unwound further from the moved bobbin (1).

The yarn is guided from the displaced bobbin (1) through the yarn eye (43) so that the yarn is pulled over the bobbin end and unwinds "in defile" in a substantially axial direction from the bobbin (1).

In a next step, a new full bobbin (1N) is placed on the vacant primary set point (P1) (see fig. 8c). In a third step, the front unwinding ends of the yarn on the full bobbin (LN) are connected to the rear end of the yarn on the displaced unfilled bobbin (1), sandwiching between the two bobbins (1), (1N ) extending yarn portion is held by said yarn clip (44) (see Figure 8d). (When all the yarn has been taken off the displaced bobbin (1) (see Figure 8e) the yarn is first pulled out of the yarn eye (43) ( see figure 8f) and then also pulled out of the thread clamp (44) (see figure 8g) .Then the thread is further unwound from the new bobbin (1N) 'in déroulé' (see figure 8g). Finally, the empty sleeve ( H1) from the displaced bobbin (1) (see Fig. 8h). In yet another embodiment of the bobbin rack (see Fig. 9), the bobbin rack (100) comprises, at different levels, parallel horizontal rows of primary set points, where, in a space between these rows of primary depots, a series of secondary depots n is provided.

On the part of the bobbin rack that is shown in figures 9 and 10, only two such levels are represented, and per level there are each time two consecutive full bobbins (1N), (2N) of a left row of primary positioning places and two consecutive bobbins (3N) , (4N) of a right row of primary depots.

The axes of these spools are approximately perpendicular to the direction (Z) of the rows (called the driving direction). A series of secondary depots are provided at each level between the left row and this right row of primary depots.

In Figs. 9 and 10, at four consecutive secondary positioning places, respective unfilled bobbins (3), (1), (4), (2) are placed, which are located one after the other in the direction of travel (R).

The bobbin shafts of the incomplete bobbin (1) - (4) in this interspace also extend in a direction which is substantially perpendicular to the said direction of travel (R). the consecutive unfinished bobbins (3) (1), (4) (2) of the intermediate row are located alternately mainly to the left and mainly to the right of the vertical symmetry plane (S) of the interspace, and are placed on secondary depots that alternately belong to a primary depot of the left row and belong to a primary depot of the right row primary depots. As best seen in Figure 10, the secondary set points to the right of the plane of symmetry (S), on which the first (3) and the third unfilled bobbin (4) are placed, belong respectively to the primary set points of the right row on which the full bobbins (3) and (4) are placed, and the secondary set points to the left of the symmetry plane (S), on which the second (1) and the fourth unfilled bobbin (2) are placed, belong respectively to the primary set points of the left row on which the full bobbins (1) and (2) are placed. Figures 11a to 11d show the successive process steps in supplementing the bobbin rack, part of which is shown in Figures 9 and 10. The two reels placed on a primary depot and on an associated secondary depot are positioned one behind the other with their reel shafts in line and can be moved together on a slidable carrier (60) along the longitudinal direction of their reel shafts.

When the amount of yarn on a bobbin (3) has reached a certain minimum threshold, the carrier is shifted backwards as shown in figure 11b, the unfilled bobbin (3) is placed on the secondary set-up place (ie the front part of the carrier (60) ), after which a new full bobbin (3N) is placed on the vacant secondary setting point (ie the rear part of the carrier (60)). This situation is shown in figure 11c. The yarn ends of the yarn on the unfilled bobbin (3) and of the yarn on the full bobbin (3N) are joined together. The carrier (60) is finally pushed back forward so that the reels take up their original position in the reel rack (100). During these operations, the yarn take-off continues, the yarn being passed through the front end of the u-shaped carrier (60).

Claims (28)

CONCLUSIONS A method for replenishing yarn supplies in a yarn supply device (100) in which a plurality of yarn supplies in the form of bobbins (1 - 16) wound on respective bobbin holders (H1 - H16) are placed at respective primary set locations (P1 - P16), while, from these stocks, yarns (21) are taken up by a machine (101) for the pattern production of textile products, the replenishing of a yarn stock means that a new bobbin (1N-16N) with a new yarn stock at a primary depot (P1- P16) is provided in the yarn stocking device (100), characterized in that a yarn stock is replenished by - moving an unfilled bobbin (1-16) containing the yarn stock to be replenished from its primary depot (P1-P16) to a secondary setting point (S1-S16) in the yarn supply device (100), so that the yarn (21) can be taken up further from this displaced bobbin (1 - 16) by the machine (101) in operation , - place the new bobbin (IN - 16N) on the released primary setting point (P1), and - connect a unwinding end (1a) of the yarn present on the new bobbin (1N - 16N) to one end of (1b) of the yarn present on the moved bobbin (1 - 16), so that after the yarn has been picked up on the moved bobbin (B :), the yarn is picked up further from the new bobbin (1N-16N). A method for replenishing yarn supplies according to claim 1, characterized in that the yarn supply device (100) is arranged so that the yarn (21) taken up by the textile machine (101) from a bobbin placed at a primary setting point (P1-P16) (1-16, 1N-16N) is unwound, and is unwound from a bobbin (1-16) placed on a secondary deposition site (S1-S6) in a substantially axial direction (R2) from the bobbin. A method for replenishing yarn supplies according to claim 2, characterized in that the yarn supply device (100) is provided to keep the bobbins at their respective primary set points (P1) - (P4) and at their respective secondary set points (S1) - (S4). ) in a position where their bobbin axes extend in the same direction, and includes at least one yarn guiding device (42) for guiding the yarn from a bobbin (1) at a secondary setpoint in a direction where it is pulled by a pulling force in the yarn is unwound from this bobbin (1) on yarn take-off in a substantially axial direction, and to guide the yarn from a bobbin (1N) at a primary setting point in a direction where a pulling force in the yarn during yarn withdrawal from this bobbin ( 1N) is unwound. A method for replenishing yarn supplies according to claim 3, characterized in that the yarn guide device (42) comprises at least one associated yarn guide (43), (44) for each set of a primary and a secondary set-up point, and that the yarn supply device is so provided is that, when replenishing a yarn supply, the yarn travels along a first yarn path from a displaced bobbin (1) at a secondary set-up location to an associated yarn guide (43) and thereby becomes in a substantially axial direction of this displaced bobbin (1). unwound, and, after all the yarn has been taken off the displaced bobbin (1), runs along a second yarn path to the associated yarn guide (43), each yarn guide (43), (44) being provided to stop the guiding of the yarn as a result of this change in the yarn path, and that as a result of the stopping of this guide the yarn follows a third yarn path with the yarn further from the said The new bobbin (1N) on the primary depot is unwound. A method for replenishing yarn stocks according to claim 2, characterized in that the yarn stocking device (100) is provided to hold the bobbins at their respective primary set point (P1) - (P4) in a position where their bobbin axis lines are aligned along extends in a first direction, and to maintain a bobbin at at least one secondary positioning site in a position wherein said bobbin axis extends in a second direction different from the first direction. A method for replenishing yarn supplies according to claim 5, characterized in that the first direction and the second direction are not parallel to each other. A method for replenishing yarn supplies according to claim 1, characterized in that the yarn supply device (100) is provided to collect the yarn received by the machine (101) from each bobbin placed on a primary set-up location and from each bobbin placed on a secondary set-up location. to be unwound in a substantially axial direction from the bobbin. A method for replenishing yarn supplies according to any one of the preceding claims, characterized in that a respective secondary setting point is provided for each bobbin in the yarn supply device (100). A method for replenishing yarn stocks according to any one of claims 1 to 7, characterized in that the number of secondary set points in the stock device (100) is less than the number of primary set points. A method for replenishing yarn supplies according to any one of the preceding claims, characterized in that the available bobbin space at each secondary deposition location of the yarn supply device (100) is less than the available bobbin space at each primary deposition location. A method for replenishing yarn supplies according to claim 8, characterized in that the available bobbin space at the secondary depots is at most 75%, preferably at most 50%, more preferably at most 35% of the available bobbin space at the primary depots . Method for replenishing yarn supplies according to any one of the preceding claims, characterized in that the yarn supply device (100) has at least two secondary positions and that at least two yarn supplies are replenished simultaneously. A method for replenishing yarn supplies according to any one of the preceding claims, characterized in that, after the yarn has been taken up on the moved bobbin, the empty bobbin holder is removed from the moved bobbin. A method for replenishing yarn stocks according to any one of the preceding claims, characterized in that the yarn stocking device comprises a monitoring device which repeatedly or permanently determines a respective bobbin parameter of at least one bobbin that is proportional to the length of the yarn present on the bobbin, and that the stock of yarn present on a bobbin is replenished when the relevant bobbin parameter has reached a predetermined threshold value. A yarn supply device (100) for a machine (101) for the pattern production of textile products, in which a plurality of yarn supplies in the form of bobbins (1-16) wound on respective bobbin holders are placed at respective primary set points (P1-P6), with characterized in that the yarn supply device (100) comprises - displacement means provided to move an unfilled bobbin (B:} from its primary set point (P;) to a secondary set point (S1), so that the yarn (1) further from this displaced bobbin (1-16) can be received by the machine (101) in operation, - positioning means provided for placing a new bobbin (1N-16N) on the released primary positioning site (P1), and - connecting means providing are to connect a unwinding end (1a) of the yarn present on the new bobbin (1N-16N) to one end of (1b) of the yarn present on the displaced bobbin (1-16) so that, after the yarn (1 ) on the moved The bobbin (1) is taken up, the yarn is picked up further from the new bobbin (1N-16N). A yarn supply device (100) according to claim 15, characterized in that it comprises at least one secondary set-up location where the available bobbin space is less than the available bobbin space at the primary set-up locations. A yarn stocking device (100) according to claim 15 or 16, characterized in that the yarn stocking device (100) is provided to unwind the yarn (1-6) taken up by the machine (101) from each bobbin placed on a primary set-up location , and unwind from each bobbin placed on a secondary deposition in a substantially axial direction from the bobbin. A yarn supply device (100) according to any one of claims 15 to 17, characterized in that it is provided to hold the bobbins at their respective primary set points (P1) - (P4) and at their respective secondary set points (S1) - (S4). ) in a position where their bobbin axes extend in the same direction, and that it includes a yarn guiding device for guiding the yarn in a direction from a bobbin at a secondary set-up location where, by a pulling force in the yarn on yarn take-off, it is essentially axial direction of this bobbin, and to guide the yarn from a bobbin at a primary setting point in a direction where it is unwound by a pulling force in the yarn as the yarn is taken off this bobbin. A yarn supply device (100) according to claim 18, characterized in that the yarn guide device comprises at least one associated yarn guide for each set of a primary and a secondary set-up location, and that the yarn supply device is arranged such that, when replenishing a yarn supply, yarn runs along a first yarn path from a displaced bobbin at a secondary setting location to the associated yarn guide and thereby unwinds in a substantially axial direction from this offset bobbin, and, after all the yarn has been taken off the displaced bobbin, along a second yarn path to a accompanying yarn guide, and that each yarn guide is provided to stop the guiding of the yarn as a result of this change in the yarn path, and that as a result of the stop of this guide the yarn follows a third yarn path with the yarn further from said new bobbin is unwound. A yarn stocking device (100) according to any one of claims 15 to 17, characterized in that the yarn stocking device (100) is provided to hold the bobbins at their respective primary set-up location in a position where their bobbin axis lines extend in a first direction. and to maintain a bobbin at at least one secondary set-up location in a position where said bobbin axis extends in a second direction different from the first direction. A yarn supply device (100) according to claim 20, characterized in that the first direction and the second direction are not parallel to each other. A yarn supply device according to claim 15 or 16, characterized in that the yarn supply device (100) is provided to collect the yarn (1-6) taken up by the machine (101) from each bobbin placed on a primary set-up location and from each on a secondary unwind placed bobbin in a substantially axial direction from the bobbin. A yarn supply device (100) according to claim 22, characterized in that the supply device comprises a first series of primary set-up locations for placing a plurality of first bobbins side by side on a first row in a position having their axis lines transverse to the direction of travel, and a second set of primary set points for placing a plurality of second coils side by side on a parallel second row in a position where their axis lines are transverse to the direction of travel, that the first row of coils and the second row of coils are parallel to each other with a horizontal spacing so that a spacing is formed, the yarn supply device including a series of secondary set points located in said spacing for placing unfilled first bobbins and unfilled second bobbins in a position having their axis lines transverse to said direction of travel, and that the secondary depots are provided in such a way that the non-vo All bobbins form an intermediate row running in the direction of travel, in which the successive non-full bobbins are located one after the other in the direction of travel. A yarn supply device (100) according to claim 23, characterized in that the successive non-full bobbins of the intermediate row are alternately located substantially to the left and substantially to the right of the vertical symmetry plane of the interspace, and alternately as a secondary setting place for a first bobbin and be provided as a secondary depot for a second bobbin. A yarn stocking device (100) according to any one of claims 15 to 24, characterized in that a respective secondary set-up location is provided for each bobbin in the yarn stocking device (100). A yarn supply device (100) according to any one of claims 15 to 24, characterized in that the number of secondary set points in the supply device (100) is less than the number of primary set points. A yarn supply device (100) according to any one of claims 15 to 26, characterized in that the available bobbin space on the secondary pitches is less than available bobbin space on the primary pitches, preferably is at most 75%, more preferably at most 50% is, even more preferably, at most 35% of the available bobbin space at the primary depots. A yarn stocking device (100) according to any one of claims 15 to 27, characterized in that the yarn stocking device (100) is a bobbin rack and that the machine (101) is a weaving machine or a tufting machine or a knitting machine.