IT202000005383A1 - Guide organ for the threads of a circular weaving machine - Google Patents

Description

DESCRIPTION

attached to a patent application for PATENT D? INDUSTRIAL INVENTION entitled:

? GUIDING ORGAN FOR THE WIRES OF A TEXTILE MACHINE

CIRCULAR?

Field of the found

The present invention relates to a guide member for the threads of a circular textile machine, in particular for knitwear or hosiery. The invention also relates to a circular weaving machine comprising this guide member.

Background of the finding

The present invention relates to the technical sector of circular textile machines for knitting, seamless knitting, hosiery and the like.

Circular textile machines are typically equipped with thread guide organs (typically called? Boxes ?,? Sills ?,? Nozzles ?, or in English? Throat plate?). These thread guiding members are located externally to the needle holder cylinder and face it, typically in correspondence with a thread feeding point, or? Drop? of the textile machine. Pi? in detail, the guiding members are usually located in correspondence with the thread feeding devices of the weaving machine (or? thread guiding groups?), which are responsible for delivering the threads to the needles of the weaving machine. The yarn guide members are interposed between the yarn guides and the knitting surface on the cylinder, and have an operating surface facing the cylinder needles. This operative surface serves to contain the movement of the tongues of the needles in rotation with the cylinder, to prevent said tongues from closing, accidentally, before having received the thread (or threads) necessary for the formation of the stitch. In fact, the formation of the stitch foresees that the needle presents, wound around its stem, the loop of stitch formed at the previous feed; the needle - continuing its rotation - begins to rise, thanks to the action of the? needle lifting cams ?, to take the next thread. During this ascent, the tab moves to the open position and passes over the knitting bush; subsequently the needle, with the open tongue, receives a new thread, after which? it descends and - during this descent - the tab closes (by rotating) due to the thrust imparted by the knitting bush present on the needle stem itself. In this way the needle, carrying the new thread, creates a new knitting loop; the cycle of formation of the mesh pu? then resume with a new needle rise.

? It is evident that if at the moment of the needle ascent (needle in the? up? position) the tab was closed for some reason, it would not be possible for the needle to take the new thread and then form a new stitch.

The wire guide member, with its front surface facing the cylinder, prevents the closing of the tabs: in this way yes? certain that the needles, ready to receive the respective thread, have their tongue correctly open. The guide organ of the wires? then positioned in the weaving machine in such a position as to ensure that the tabs of the needles (which have unloaded the previous stitch and are rising) are kept open until the new thread is picked up. Subsequently, the tab you can? close and not? pi? the presence of the guide organ is necessary. In fact, in the points where the needles descend in proximity? of the knitting formation, thanks to the action of the knitting cam, not? there is no active surface on the tabs.

An example of a thread guide for textile machines? described in patent document WO2015107406 A1, in the name of the same Applicant. Such a wire guide member? intended, in particular, to be used in the case of a textile processing in? vanis ?? (in English? plating?). This process involves the simultaneous use of two threads inside the same needle: a first thread, called? Bottom thread? and a second thread, called? filo in vanis ??, each fed by a respective thread guide. The result of this processing consists in a fabric which has only the bottom thread visible on its external side, while only the vanis? Thread is visible on its internal side. Basically, the textile processing in vanis? combines two distinct threads (and typically having different characteristics) in a single fabric, which is characterized by two sides with properties? different, based on the thread emerging on each side.

A vanis processing ?, so that? the resulting fabric is correct and the threads are visible on the intended side, does it require precise positioning of the bottom thread and the vanis thread? inside the needle head; there? - in turn - it requires that the two threads, fed by a respective thread guide, assume a respective determined feed trajectory from the thread guide to the needle, such as to determine a correct positioning of the threads.

Pi? in detail, consider that the head of a needle shaped like a hook has a? tip?, that is the end? of the needle itself that can be opened and closed by the tongue, and a? back ?, in correspondence of which the head? connected to the needle shaft. Is the tip of the head in the lowest position? external, that is more? away from the main axis of the cylinder, while the back of the head is in the most position? internal, that is more? close to the main axis of the cylinder.

In this condition, the thread in vanis? (destined to be inside the fabric) must be positioned, inside the head of the needle, towards the tip of the head itself, while the bottom thread (destined to be on the outside of the fabric) must be positioned, too? inside the needle head, towards the back of the head itself. In this way, the bottom thread is positioned more? close (radially) to the axis of the cylinder, while the wire in vanis? is positioned more? away (radially) from the cylinder axis.

To obtain a correct positioning of the wires for processing in vanis ?,? known the use of special needles for vanis?, shaped in such a way as to force the positioning of the two threads in the needle head in the manner described above, furthermore, the respective heights of the thread guides carrying the bottom thread and the thread are selected. vanis ?, in order to send the two threads into the needle head with a certain inclination and obtain the correct positioning of the two threads inside and outside the head.

The solution of the patent document WO2015107406 A1, on the other hand, provides for providing the thread guide member, in addition to an operating surface facing the needles of the cylinder, also with a guide portion shaped like a? Step ?, re-entering from the operating surface towards the outside of the needle holder cylinder and defining an abutment able to radially contain the thread in vanis? positioned and sliding on it.

The step allows cos? to correctly position the two threads inside the needle head, and to define precise trajectories for the threads used in the vanis? processing.

Summary

The Applicant has found that the known type of guiding members of the yarns are not free from drawbacks and can be improved under various aspects. In particular, the guide members are subject to wear phenomena that can compromise their functionality.

In greater detail, the front surfaces - facing the needle holder cylinder - are responsible for guiding the feeding threads, delivered by the thread guiding devices, towards the needles rotating with the cylinder. The power wires run over the surfaces of the guide member and press on them. This continuous action causes a consumption of the material of the guide member, in particular in the case of particularly abrasive yarns or yarns containing synthetic fibers or with high hardness.

The consumption of material can? create grooves and damage the surface of the wire guide organ: there? can determine an incorrect positioning of the threads, an imprecise or incorrect formation of the stitch and, more? in general, can? lead to the formation of errors or imperfections in the knit, in particular in the vanis knitting.

The known type solutions are therefore plagued by wear problems, which can lead to a lowering of the quality. of the mesh produced by the textile machine.

In this context, the Applicant has verified that known guide members do not provide the performance required for optimal textile processing.

In this situation, the underlying purpose of the present invention, in its various aspects and / or embodiments,? provide a guide member for the threads of a circular weaving machine and a circular weaving machine comprising this member which may be able to obviate one or more? of the aforementioned drawbacks.

A further purpose of the present invention? that of providing a guide member for the threads of a circular textile machine capable of solving the problems associated with wear due to the sliding and rubbing of the feed threads.

A further purpose of the present invention? that of providing an organ for guiding the yarns of a textile machine capable of precisely defining the trajectory of one or more? power wires.

A further purpose of the present invention? that of providing a guide organ suitable also for use for textile processing in vanis ?.

A further purpose of the present invention? that of providing a guide organ capable of preventing the presence of any bent or crooked needles from damaging one or more? power wires.

A further purpose of the present invention? that of providing a guide member for the threads of a circular textile machine, and a method for the realization of a textile processing, which allow to obtain a quality fabric? high and / or free of imperfections.

These objects, and other possible objects, which will become clearer in the course of the following description, are substantially achieved by a guide member for the threads of a circular weaving machine, and / or a circular weaving machine comprising this member, and / or a method for the realization of a textile processing, according to one or more? of the joined claims, each of which taken alone (without its dependencies) or in any combination with the other claims, as well as? according to the following aspects and / or embodiments, variously combined, also with the aforementioned claims.

In a first aspect, the invention relates to a guide member for threads of a circular weaving machine, said guiding member being intended to be mounted on a fixed structure of a circular weaving machine, so as to be positioned externally to a needle holder cylinder of the circular textile machine housing a plurality of of needles and rotatable around a main axis of the needle holder cylinder.

In one aspect, the guide member comprises a body of the guide member having at least one operating surface intended to face the needle-holder cylinder and to extend around at least an angular portion of the needle-holder cylinder.

In one aspect, the operating surface? configured to keep the tabs of the needles open, in rotation with the needle holder cylinder, during the passage of the needles in front of the operating surface, and to define the paths of the threads. In one aspect, the operating surface? intended to be positioned at a point of thread feeding to the needles, so that the tabs of the needles are kept open and the needles are able to receive the respective thread or threads.

In one aspect, the guide member comprises an insert, distinct from said body and mountable thereto.

In one aspect the insert? equipped with at least one guiding surface configured - in use - to receive at least one feed thread running on it, carried by a thread guide of the textile machine.

In one aspect the driving surface? configured to guide and / or direct said at least one feed thread in its path from the thread guide to the needles of the weaving machine.

In one aspect the insert? removable mountable to the body of the guide member. In a said aspect, at least one thread slides over at least a portion of the guiding surface.

In one aspect, the driving surface of the insert? configured to at least partially deviate, on the basis of a geometry of the guiding surface itself, the trajectory of the thread to convey it into the needles.

In one aspect, said sliding of said at least one feed thread on the guiding surface occurs with contact of the feed thread on at least a portion of the guiding surface.

In one aspect, the guide surface is, in use, subjected to the passage of one or more? feeding threads, to guide their trajectory from the thread guides to the needles of the textile machine, said guide surface being the portion of the guide member subjected to wear due to the sliding of the threads, said insert being interchangeable (replaceable) to allow the ? guide member of a new guide surface.

In one aspect said driving surface? distinct from said operating surface. In one aspect the insert? mounted to the body of the guide member in such a way that the guide surface follows the operating surface with respect to the direction of rotation of the needle holder cylinder.

In one aspect the guide surface follows the working surface with continuity. with respect to it, so as not to interfere with the passage of the needles and / or the needle tabs.

In one aspect the driving surface? configured to intercept and guide the yarns supplied by the yarn guides in an intermediate position between an upstream side, from where the yarns are delivered, to a downstream side, where the yarns engage with the needles, set in motion by the knitting cams due to the rotation of the needle holder cylinder. In one aspect, the guiding surface comprises a front portion facing the needle-holder cylinder and facing the needles.

In one aspect the front portion develops entirely (ie lies) on a single vertical plane parallel to the main axis of the needle holder cylinder. In one aspect the front portion develops from a lower edge to a vertically overlapping upper edge.

In one aspect, alternative to the previous two, the front portion? curved or inclined in such a way that its development from a lower edge to an upper edge, with respect to the main axis of the needle holder cylinder, progressively moves away, in a radial direction, with respect to the main axis of the needle holder cylinder.

In one aspect, the guiding surface comprises a lateral portion extending laterally with respect to the front portion and before it with respect to the direction of rotation of the needle-holder cylinder.

In one aspect the lateral portion? facing the operating surface of the guide member.

In one aspect, the lateral portion of the guiding surface develops continuously. from the front portion, and between them? defined, and shared, a contact edge.

In one aspect, the lateral portion forms an angle with the front portion in such a way as to extend, starting from the contact edge, away from the needles and towards a side of origin of the yarns delivered by the yarn guides.

In one aspect the lateral portion? facing said upstream side, from where the yarns are delivered.

In one aspect the driving surface? shaped in such a way that the wires interact with it by sliding in contact at least partially on said front portion and / or on said side portion and / or on said contact edge. In one aspect the driving surface? shaped in such a way that the wires interact with it by sliding in contact at least partially on the lateral portion and on the contact edge.

In one aspect the driving surface? shaped in such a way that the wires interact with it by sliding in contact at least partially on the contact edge only.

In one aspect the yarns slide on the front portion and / or on the lateral portion of the guiding surface according to the trajectory of the yarns and the position of the yarn guides and the knitting cams.

In one aspect the driving surface can includes more? lateral portions developing in sequence alongside the front portion.

In one aspect the driving surface? composed of a plurality? of portions, in such a way as to be multifaceted.

In one aspect the insert includes an end (lower and / or lateral), preferably pointed in shape. This extremity? can be both a portion of the extremity? lower, is a portion of the extremity? side of the insert.

In one aspect the extremity? lower and / or lateral? facing the operating surface.

In one aspect on the extremity? lower and / or lateral? defined at least a portion of the guide surface.

In one aspect on the extremity? lower and / or lateral? defined an initial portion of the guide surface along the direction of rotation of the needle-holder cylinder (ie the first part of the guide surface which meet the rotating needles).

In one aspect the extremity? lower and / or lateral? facing the operating surface.

In one aspect the extremity? lower and / or lateral? destined to be placed side by side with the operative surface, in such a way that the extremity? basically follows with continuity? the operating surface along the direction of rotation of the needle holder cylinder. In one aspect the extremity? lower and / or lateral? configured to be, with the insert mounted to the body of the wire guide member, at least partially below the operating surface.

In one aspect the extremity? lower and / or lateral? configured to be, with the insert mounted to the body of the wire guide member, at least partially covered, or surmounted, by a portion of the body on which? defined the term (or end part) of the operating surface.

In one aspect the insert? mountable to the body of the guide organ in such a way that the end? bottom is (slightly) set back from the operating surface, away from the main axis.

In one aspect, preferably in case the end? is of pointed shape, on the extremity? the front portion and / or the lateral portion and / or the contact edge of the guiding surface terminate and preferably converge.

In one aspect the insert has a front side, at which? the guiding surface is defined, and a mounting portion, comprising members for the removable mounting of the insert to the body of the guiding member.

In one aspect, the mounting portion of the insert? placed in correspondence of a rear side of the insert, opposite to the front side.

In one aspect the insert? a monobloc element, i.e. made in a single piece. In one aspect the body of the guide organ? a monobloc element, i.e. made in a single piece.

In one aspect, the body comprises a mounting section configured to at least partially receive said members for mounting the insert, in which the insert is mounted to the body according to a determined positioning, and in which said mounting section and said members for the assembly allow a registration of said positioning.

In one aspect, the positioning adjustment comprises an adjustment of the radial position of the guiding surface, moving away from or approaching the main axis, and / or an adjustment of the lateral position of the guiding surface, in a circumferential direction with respect to the distribution of the needles. of the needle holder cylinder, and / or axial, i.e. substantially parallel to the main axis.

In one aspect, the body mounting section comprises a mounting seat and the insert mounting members comprise a ridge, having the shape of a notch or pin, configured to be inserted into said mounting seat to carry out the mounting of the insert. to the body according to said determined positioning.

In one aspect said relief of the insert? integral, or in a single piece, with the entire insert.

In one aspect the assembly site? configured to allow, once the relief of the insert? inserted in it, the registration of the position of the relief to determine said positioning of the insert with respect to the body.

In one aspect, the adjustment of the positioning of the insert relative to the body determines the position of the guiding surface relative to the needle cylinder. In one aspect the assembly site? set back from an anterior side of the body, at which? defined the operating surface.

In one aspect, the mounting seat has a cavity conformation. or recess.

In one aspect, the mounting seat extends radially between a front abutment, facing the needle-holder cylinder, and a rear abutment, radially away from the front abutment.

In one aspect, the front stop and the rear stop are parallel to each other and oriented orthogonally to a radial direction with respect to the main axis of the needle holder cylinder.

In one aspect, the relief extends between a front edge, facing the needle holder cylinder, and a rear edge, radially away from the front stop.

In one aspect the leading edge and the trailing edge are parallel to each other.

In one aspect, the (radial) distance between the front abutment and the rear abutment of the assembly seat, i.e. the length of a segment orthogonal to both abutments,? greater than the distance between the front edge and the rear edge of the insert relief.

In one aspect, in relief inserted in the assembly seat,? present a free space that can? be between the front edge and the front stop and / or between the rear edge and the rear stop.

In one aspect the radial extension of the mounting seat? greater than the radial extension of the relief, and the difference between the radial extension of the mounting location and the radial extension of the relief? equal to said free space. In one aspect, the free space has a radial extension equal to the sum of the (radial) distance between the leading edge and the front stop and the (radial) distance between the rear edge and the rear stop.

In one aspect, the relief can? be positioned in the assembly seat in a radial position at will between an advanced position, in which the leading edge? in abutment on the front striker, and a backward position, in which the rear edge? abutment on the rear striker.

In one aspect, free space in the forward position? present only between the rear edge and the rear stop, and coincides with the (radial) distance between the rear edge and the rear stop, while in the rear position the free space? present only between the front edge and the front stop, and coincides with the distance (radial) between the front edge and the front stop. In one aspect, in an intermediate mounting position between the forward position and the rear position, the relief? inserted in the assembly seat without the front edge touching the front stop and without the rear edge touching the rear stop, thus there is a free space (front) between the front edge and the front stop and a respective free space (rear) between the rear edge and the rear abutment, the sum of these two free spaces being equal to the difference between the radial extension of the mounting seat and the radial extension of the relief.

In one aspect the insert can? be mounted to the body in any position, with the insert pad placed in the mounting seat in a position between the forward position and the rear position (included).

In one aspect, the relief of the insert and the mounting seat are configured to allow an adjustment of the mounting of the insert to the body of the guide member, in particular along a radial direction (facing towards, and passing through, the main axis of the needle cylinder).

In one aspect, the profile of the insert relief and the respective profile of the body mounting seat are generally counter-shaped to each other, but with a free space in the radial direction.

In one aspect, the body of the guide member comprises a fixing hole for the insert and the insert comprises a fixing member, preferably of the threaded type (e.g. a screw), configured to fit into the fixing hole and fix the position. of the insert with respect to the body, with the relief in the mounting location.

In one aspect, the insert comprises a slot for the passage of the fastening member, the slot extending along a radial direction to allow the insert to be mounted in any position between the forward position and the rear position.

In one aspect, the longitudinal extension of the slot, in the radial direction,? equal at least to the radial dimension of said free space.

In one aspect the body of the guide organ? made of metallic material, preferably steel.

In one aspect the insert? made of a material resistant to the wear of the sliding wires, preferably a material with high hardness.

In one aspect the insert? made of metallic material, preferably steel. In one aspect the insert? made of zirconium.

In one aspect the insert? made of ceramic material.

In one aspect the insert? made of a material, such as steel, coated with a wear-resistant film, in which the film? applied to the insert by means of a physical vapor deposition (PVD) process.

In a film aspect? in titanium nitride or chromium nitride.

In one aspect, the external surface of the insert, in particular said guide surface, has a surface finish characterized by a low roughness. In one aspect, the driving surface of the insert? shaped according to certain characteristics of the textile processing to be carried out with the textile machine.

In one aspect, the driving surface of the insert? shaped according to the characteristics of the power supply wires that the insert? intended to guide during textile processing.

In an independent aspect, the present invention relates to a textile machine, in particular of the circular type for knitting, hosiery or the like, comprising:

- a fixed structure;

- at least one needle-holder cylinder rotatably mounted in said supporting structure; - a plurality? of needles supported by said needle-holder cylinder and movable parallel to an axis of rotation of the needle-holder cylinder to produce a knitted fabric;

- at least one guide organ according to one or more? of the aspects and / or the appended claims, mounted to the fixed structure in such a way as to be positioned externally to the needle holder cylinder.

In one aspect, said fixed structure comprises a support ring extending circumferentially around said needle holder cylinder, the guide member being mounted to said support ring.

In one aspect, the textile machine comprises a plurality of materials. of guide members, distributed - preferably in a uniform manner - on said support ring and each positioned in correspondence with a respective feed point, or drop point, of the textile machine.

In an independent aspect, the present invention relates to a method for carrying out a textile processing, the method comprising the steps of:

- providing a textile machine, preferably of the circular type;

- providing at least one guide member according to any one of the preceding claims;

- arranging at least one feeding thread, delivered by a thread guide of the textile machine;

- feeding the needles of the textile machine with said feed thread and producing knitting stitches.

In one aspect, the method comprises, during the step of feeding the needles of the weaving machine, a step of guiding or directing the thread, through the guiding surface of the guiding member, in its path from the thread guide to the needles of the weaving machine.

Each of the above aspects of the invention can? be taken alone or in combination with any of the claims or other aspects described. Further characteristics and advantages will become clearer from the detailed description of some embodiments, including also a preferred embodiment, exemplary but not exclusive, of a guide member for the threads of a circular weaving machine in accordance with the present invention and of a method for carrying out a textile processing, in accordance with the present invention.

Description of the drawings

This description will come? shown below with reference to the accompanying drawings, provided for indicative purposes only and, therefore, not limitative, in which:

Figure 1 shows a perspective view of a possible embodiment of a thread guide member of a circular weaving machine according to the present invention,

Figure 2 shows a top plan view of the guide member of Figure 1; Figure 3 shows a front view of the guide member of Figure 1;

Figure 4 shows an enlargement of a portion of Figure 1;

- figure 4A? a further enlargement of a portion of figure 4;

- figure 5? an exploded perspective view of the guide member of figure 1; - figure 6? a sectional view of the guide member of figure 2, sectioned along the plane VI-VI;

- figure 7? a rear perspective view of the guide member of figure 1, with some parts removed;

- figure 8? a perspective view, from below, of a possible embodiment of an insert of a guide member according to the present invention;

- figure 9? a further rear perspective view of the insert of figure 8; - figure 10? a perspective view of a further possible embodiment of an insert of a guide member according to the present invention, alternative to the embodiment of figure 8.

Detailed description

With reference to the aforementioned figures, with the reference number 1? Overall, a thread guide member has been indicated, for a circular weaving machine, in accordance with the present invention. Generally, the same reference number? used for the same or similar elements, possibly in their construction variants.

Figure 1 shows a possible embodiment of a guide member for the threads of a textile machine according to the present invention. The textile machine and its components (needle holder cylinder, control elements, processing unit, etc.) are not shown in detail in the figures, as per se? known and conventional types. From a point of view of textile technology, the operation of the entire textile machine (for example the interaction between the yarn guides and the needles, the cooperation between needles and threads, etc.) is not? described in detail, since it is known in the technical field of the present invention. See also what is described in the patent document WO2015107406 A1, in the name of the same Applicant

The guide organ 1? intended to be mounted on a fixed structure of a circular weaving machine, in such a way as to be positioned externally to a needle-holder cylinder of the circular weaving machine, which houses a plurality of of needles and d? able to rotate around a main axis of the needle holder cylinder.

The needle holder cylinder can? have a variable diameter according to the textile needs; for example, the diameter can? be 4 inches, 8 inches, 16 inches, 24 inches, etc .. The needle cylinder can be, in an equivalent way, a needle holder plate. In the context of this description, the use of terms such as? Anterior ?,? Posterior ?,? Radial ?,? Superior ?,? Inferior ?,? Horizontal ?,? Vertical ?,? Front ?, and the like refers, except different specific indications, to a spatial orientation that normally the object of the invention can? assume in operating conditions or conditions of use (in particular, with the guide member in use, ie mounted in a textile machine in its correct position with respect to the needle holder cylinder). For example, the radial direction? always considered with reference to the main axis of the needle holder cylinder, around which the guiding members are mounted.

The guide member 1 comprises a body 2 having at least one operating surface 5 intended to face the needle-holder cylinder and to extend around at least an angular portion of the needle-holder cylinder. The operating area 5? configured to keep the tabs of the needles open, in rotation with the needle holder cylinder, during the passage of the needles in front of the operating surface, and to define the trajectories of the feeding threads.

The operating area 5? intended to be positioned at a point of feeding thread to the needles, or? drop?, so that the tabs of the needles are kept open and the needles are able to receive the respective thread or the respective feed threads.

The guide member 1 further comprises an insert 10, distinct from the body 2 and mountable thereto. The insert 10? equipped with at least one guide surface 4 configured - in use - to receive at least one feed thread running on it, carried by a thread guide of the textile machine. In other words, the driving surface 4? configured to guide and / or direct a wire, or more? feeding threads in their path from the thread guides to the needles of the textile machine. Preferably the insert 10? removably mountable to the body 2 of the guide member.

Preferably said at least one thread slides on at least a portion of the guide surface 4.

Preferably the guiding surface 4 of the insert 10? configured to at least partially deviate, on the basis of a geometry of the guiding surface itself, the trajectory of the thread to convey it towards the needles.

Preferably the aforesaid sliding of said at least one feed thread on the guide surface 4 occurs with contact of the feed thread on at least a portion of the guide surface.

Preferably, the guide surface 4 is, in use, subjected to the passage of one or more? feed threads, to guide their trajectory from the thread guides to the needles of the weaving machine, and the guiding surface 4? the portion of the guide member 1 subjected to wear due to the sliding of the yarns. The insert 10? interchangeable (ie replaceable) to allow - if necessary - to equip the guide member with a new guiding surface.

Preferably the guiding surface 4? distinct from the operative surface 5. Preferably the insert 10? mounted to the body 2 of the guiding member 1 in such a way that the guiding surface 4 follows the operating surface 5 along the direction of rotation of the needle holder cylinder (this direction of rotation is indicated by the arrow? R? in figure 1) .

Preferably the guiding surface 4 follows the operative surface 5 with continuity. with respect to it, so as not to interfere with the passage of the needles and / or the needle tabs.

Preferably the guiding surface 4? configured to intercept and guide the yarns delivered by the yarn guides in an intermediate position between an upstream side, from where the yarns are delivered, to a downstream side, where the yarns engage with the needles, the latter being set in motion by the knitting cams due to the rotation of the needle holder cylinder.

Preferably, the guiding surface 4 comprises a front portion 11 facing the needle holder cylinder and facing the needles.

Preferably, the front portion 11 extends entirely (ie lies) on a single vertical plane parallel to the main axis of the needle-holder cylinder. In this case the front portion 11 extends from a lower edge 11a to a vertically overlapping upper edge 11b.

Alternatively, the front portion 11? curved or inclined in such a way that its development from a lower edge 11a to an upper edge 11b, with respect to the main axis of the needle holder cylinder, progressively moves away, in a radial direction, with respect to the main axis of the needle holder cylinder. needles.

Preferably, the guiding surface 4 comprises a lateral portion 12 extending laterally with respect to the front portion 11 and before it with respect to the direction of rotation of the needle-holder cylinder.

Preferably the lateral portion 12? facing the operating surface of the guide member.

Preferably, the lateral portion 12 of the guide surface 4 develops continuously. from the front portion 11, and between them? defined and shared a contact edge 13.

Preferably the lateral portion 12 forms an angle with the front portion 11 in such a way as to extend, starting from the contact edge 13, away from the needles and towards a side of origin of the yarns delivered by the yarn guides.

In one aspect the lateral portion 12? facing the aforementioned upstream side, from where the wires are delivered.

Preferably the guiding surface 4? shaped in such a way that the wires interact with it by sliding in contact at least partially on the front portion 11 and / or on the side portion 12.

Preferably the wires can interact with the guiding surface 4 sliding in contact at least partially on the lateral portion 12 and on the contact edge 13, or possibly even only on the contact edge 13.

Preferably the yarns slide on the front portion 11 and / or on the lateral portion 12 of the guiding surface 4 according to the trajectory of the yarns and the position of the yarn guides and the knitting cams.

Preferably, the guiding surface 4 can? includes more? lateral portions developing in sequence alongside the front portion. In one possible embodiment, the guide surface can be composed of a plurality? of portions, in such a way as to be multifaceted.

In a possible embodiment, exemplarily shown in the figures, the insert 10 comprises an end? lower (and / or lateral), preferably of pointed shape, facing the operative surface 5. On the extremity? inferior ? defined at least a portion of the guide surface, in particular? defined an initial portion of the guide surface 4 along the direction of rotation of the needle holder cylinder (ie the first part of the guide surface 4 which meet the rotating needles).

Preferably the end? inferior ? included in a lateral portion pi? external part of the insert, destined to be placed side by side with the operative surface 5, so that said lateral portion more? external of the insert follows substantially with continuity? the operative surface 5 along the direction of rotation of the needle holder cylinder.

Preferably the end? inferior ? configured to be, with the insert mounted to the body of the wire guide member, at least partially below the operating surface 5, in particular the terminal part of the operating surface. In other words, preferably the end? inferior ? configured to be, with the insert mounted to the body of the wire guide member, at least partially covered, or overhung, by a portion of the body 2 on which? defined the term of the operational area 5.

Thereby ? possible to obtain continuity? between the operating surface 5 and the guiding surface 4: in fact, following the direction of rotation of the needle holder cylinder, the needles first meet the operating surface 5 and then pass continuously. to the guide surface 4 of the insert 10. The positioning of the extremity? lower part of the insert below the end of the operative surface 5 minimizes discontinuity between the operating surface 5 and the guiding surface 4, ensuring optimal operation and avoiding problems of misalignment or protrusion of parts of the insert 10. There? it avoids possible collisions of the needles and / or of the tabs with the guide member 1 during rotation.

This solution ? observable, for example, in figures 1, 2, 3, 4 and 4a, which show the extremity? lower tip of insert 10 placed - insert 10 mounted to body 2 - below the end point of guide surface 5.

Preferably, the insert 10? mountable to the body of the guide organ in such a way that the end? in addition to being partially below the operative surface 5, it is also (slightly) set back with respect to it, away from the main axis.

Preferably, for example in the embodiment of the figures, in which? of pointed shape, on the extremity? lower end, and preferably converge, the front portion 11 and / or the side portion 12 and / or the contact edge 13 of the guide surface 4.

The end can be both a portion of the extremity? lower, is a portion of the extremity? side of the insert, as exemplarily shown in the figures. In this case, the end? substantially constitutes a? portion of a corner? of the insert.

It should be noted that, preferably but not exclusively, the guiding surface is responsible for guiding the yarns delivered by the smaller yarn guides. close to the stitch cam (often referred to as yarn guide 1 and yarn guide 2, following the numbering of a plurality of yarn guides of a stitch feed). Such threads are typically the so-called? Vanis? Threads.

Preferably, the insert 10 has a front side 14, at which? the guiding surface 4 is defined, and a mounting portion 16, comprising members for the removable mounting of the insert 10 to the body 2 of the guiding member.

Preferably the mounting portion 16 of the insert? placed in correspondence with a rear side 15 of the insert, opposite to the front side.

Preferably the insert 10? a monobloc element, i.e. made in a single piece.

Preferably the body 2 of the guide member? a monobloc element, i.e. made in a single piece.

Preferably, the body comprises a mounting section 20 configured to at least partially receive said members for mounting the insert 10, in which the mounting of the insert 10 to the body 2 takes place according to a determined positioning, and in which the mounting section 20 is the assembling members allow a registration of said positioning. For? Registration? we mean an adjustment or calibration of the aforesaid determined positioning. Preferably, the positioning adjustment comprises an adjustment of the radial position of the guiding surface 4, moving away from or approaching the main axis, and / or an adjustment of the lateral position of the guiding surface 4, in a circumferential direction with respect to the distribution of the needles. of the needle holder cylinder, and / or in an axial direction, substantially parallel to the main axis.

Preferably, the mounting section 20 of the body comprises a mounting seat 21 and the members for mounting the insert comprise a relief 17, having the shape of a tooth or pin, configured to be inserted into the mounting seat 21 to carry out the mounting of the insert. insert 10 to the body 2 according to the aforesaid determined positioning.

Preferably the relief 17 of the insert 10? integral, or in a single piece, with the entire insert.

Preferably the mounting seat 21? configured to allow, once the relief 17 of the insert? inserted therein, the registration of the position of the relief 17 to determine the positioning of the insert 10 with respect to the body 2.

Preferably, the adjustment of the positioning of the insert 10 with respect to the body 2 determines the position of the guiding surface 4 with respect to the needle-carrying cylinder.

Preferably the mounting seat 21? set back from an anterior side of the body, at which? defined the operating surface 5.

Preferably, the mounting seat 21 has a cavity conformation. or recess. Preferably, the mounting seat 21 extends radially between a front abutment A, facing the needle-holder cylinder, and a rear abutment B, radially away from the front abutment A.

Preferably, the front stop A and the rear stop B are parallel to each other and oriented orthogonally to a radial direction with respect to the main axis of the needle holder cylinder.

Preferably, the relief 17 extends between a front edge 18, facing the needle holder cylinder, and a rear edge 19, radially away from the front stop.

Preferably the front edge 18 and the rear edge 19 are parallel to each other. Preferably the distance between the front abutment A and the rear abutment B of the assembly seat 21, ie the length of a segment orthogonal to both abutments,? greater than the distance between the front edge 18 and the rear edge 19 of the relief 17 of the insert.

In one aspect, in relief 17 inserted in the assembly seat 21,? present a free space 22 that can? be between the front edge 18 and the front stop A and / or between the rear edge 19 and the rear stop B.

Preferably the radial extension of the mounting seat 21? greater than the radial extension of the relief 17, and the difference between the radial extension of the mounting seat and the radial extension of the relief? equal to free space 22.

Preferably the free space 22 - in relief 17 inserted in the assembly seat 21 - has a radial extension equal to the sum of the distance between the front edge 18 and the front stop A and the distance between the rear edge 19 and the rear stop B.

Preferably the relief 17 can? be positioned in the mounting seat 21 in a radial position at will comprised between an advanced position, in which the front edge 18? in abutment on the front stop A, and a rear position, in which the rear edge 19? against the rear stop B. Preferably, in the forward position the free space 22? present only between the rear edge 19 and the rear stop B, and coincides with the distance between the rear edge and the rear stop, while in the rear position the free space? present only between the front edge 18 and the front abutment A, and coincides with the distance between the front edge and the front abutment.

Preferably, in an intermediate mounting position between the forward position and the rear position, the relief 17? inserted in the assembly seat 21 without the front edge 18 being in contact with the front stop A and without the rear edge 19 being in contact with the rear stop B, thus there being a free space 22 (front) between the front edge 18 and the front stop A and a respective free space 22 (rear) between the rear edge 19 and the rear stop B. The sum of these two free spaces? equal to the difference between the (radial) extension of the mounting seat 21 and the (radial) extension of the relief 17.

Preferably the insert 10 can? be mounted to the body in any position desired, with the relief 17 of the insert 10 located in the mounting seat 21 in a position between the forward position and the rear position (included).

Preferably, the relief 17 of the insert 10 and the mounting seat 21 are configured to allow an adjustment of the mounting of the insert 10 to the body 2 of the guide member 1, in particular along a radial direction (facing towards, and passing through, the main axis of the needle cylinder).

Preferably, as shown by way of example in the figures, the profile of the relief 17 of the insert 10 and the respective profile of the mounting seat 21 of the body 2 are generally counter-shaped to each other, but with a free space 22 in the radial direction.

Preferably the body 2 of the guide member 1 comprises a fixing hole 25 for the insert and the insert 10 comprises a fixing member 26, preferably of the threaded type (for example a screw 26), configured to fit into the fixing hole 25 and fix the position of the insert 10 with respect to the body 2, with the relief 17 in the mounting seat 21.

Preferably the insert 10 comprises a slot 27 for the passage of the fastening member 26 (which in this way crosses the insert vertically), the slot 27 extending along a radial direction to allow the insert 10 to be mounted in one position. as desired between the forward position and the rear position. Buttonhole 27? passing, between an upper surface and a lower surface of the insert 10.

Preferably the longitudinal extension of the slot 27, in the radial direction, is at least equal to the radial dimension of the free space 22.

The present invention also comprises a method for registering / calibrating a guide member 1.

This method can? advantageously be implemented with a guide member of the type described above, and illustrated by way of example in Figures 1-10.

The method provides, according to the desired position for the insert with respect to the body, i.e. according to how the position of the guiding surface 4 is to be adjusted, the execution of different operations:

- to mount the insert in a (fully) forward position,? it is possible to insert the relief 17 into the assembly seat 21, bring the front edge 18 abutment against the front stop A, and then insert the fixing member 26 through the slot 27 and tighten it in the fixing hole 25 of the body 2;

- to mount the insert in a (completely) back position,? it is possible to insert the relief 17 into the assembly seat 21, bring the rear edge 19 abutment against the rear striker B, and then insert the fixing member 26 through the slot 27 and tighten it in the fixing hole 25 of the body 2;

- to mount the insert in an intermediate mounting position between the forward position and the rear position (i.e. with a front free space between the front edge 18 and the front stop A and a respective rear free space 22 between the rear edge 19 and the rear striker B),? It is possible to introduce the relief 17 into the mounting seat 21, move it as desired inside the mounting seat (using the free space 22), and then insert the fixing element 26 through the slot 27 and tighten it in the fixing hole 25 body 2.

In addition, to mount the insert in an intermediate mounting position between the forward position and the rear position,? It is also possible to operate in other ways. In fact, in the guide member 1 illustrated above, the radial extension of the mounting seat 21 and the respective radial extension of the relief 17 are known; furthermore, the radial extension of the mounting seat 21? greater than the radial extension of the relief 17, by a value equal to the free space 22.

Therefore, if it is desired to mount the insert 10 to the body 2 in an intermediate mounting position which envisages spacing the relief 17 from the stop A by a value equal to X,? It is possible to temporarily insert - between the rear edge 19 and the rear stop B - a suitable thickness having a dimension, in the radial direction with respect to the seat 21, equal to a value Y, where? Y = dimension of free space? X ".

Then the rear edge is pressed against the thickness and the fixing member 26 is tightened in the fixing hole 25.

For example, if the free space between seat 21 and relief 17? by 1mm and you want to move back the relief in the seat by 0.3mm (X) from the front stop A,? It is possible to insert between the rear edge 19 and the rear stop B a thickness of 0.7mm (Y = 1mm? 0.3mm = 0.7mm), then bring the rear edge up against the thickness, and the latter against the rear stop B, and then lock the insert.

An? Additional modality? in the forward position, as an alternative to pressing the front edge 18 of the relief against the front stop A of the mounting seat,? that of temporarily inserting - between the rear edge 19 and the rear abutment B - a thickness having a dimension Y equal to the dimension of the free space 22. In this way the front edge 18 will be? automatically against the front striker A, and you can? proceed with fixing the position.

The use of a thickness allows to obtain a registration more? precise position of the insert and avoids errors by the operator or inaccuracies in assembly.

? It is possible to provide a set of spacers, each characterized by a respective dimension Y, to realize different assemblies each with a certain retraction of the relief 17 in the seat 21, and therefore a determined positioning of the guide surface 4 of the wires by the insert 10.

Preferably the body 2 of the guide member 1? made of metallic material, preferably steel.

Preferably the insert 10? made of a material resistant to the wear of the sliding wires, preferably a material with high hardness.

For example, the? Insert? made of metallic material, preferably steel.

With a hardened steel? It is possible to obtain a hardness of the insert of for example 700HV.

Alternatively, the insert can? be made of zirconium.

With zirconium? It is possible to obtain a hardness of the insert of for example 1500HV.

Alternatively, the insert can? be made of ceramic material.

Alternatively, the insert can? be made of a material, such as steel, coated with a wear-resistant film, in which the film? applied to the insert by means of a physical vapor deposition (PVD) process. Thereby ? It is possible to obtain a hardness of the insert of for example 2000-3000HV. Preferably the movie? in titanium nitride or chromium nitride.

Preferably the outer surface of the insert 10, in particular the guiding surface 4, has a surface finish characterized by a low roughness. Preferably the guiding surface 4 of the insert? shaped according to certain characteristics of the textile processing to be carried out with the textile machine. For example, the shape and / or the inclination of the guiding surface 4 can be configured to perform terry knitting, or perforated knitting, or a vanis? Knitting.

Preferably, the driving surface of the insert can be shaped according to the characteristics of the power supply wires that the insert? intended to guide during textile processing.

Preferably, as shown in the exemplary embodiment shown in Figures 1-9, the guide surface 4 also comprises a vanis sector? 7 configured to guide a vanis? Thread, or vanis? Thread, carried by a thread guide of the weaving machine, called vanis? scrolling on the vanis sector? to form, together with a base thread, a textile processing in vanis ?.

Preferably, the operating surface 5 has a curvilinear course and extends concentrically to the needle-holder cylinder, the operating surface having a center of curvature placed on the main axis of the needle-holder cylinder. Preferably, the operative surface 5 substantially lies on a cylindrical surface concentric with respect to the needle-holder cylinder.

Preferably, as exemplary shown in the figures, the vanis? 7? defined by a step 8 falling back from the guide surface 4 (preferably from the front portion 11) away from the main axis of the needle holder cylinder.

Preferably the vanis sector? 7? positioned, in the guide member, in such a way as to be, with the guide member 1 mounted to the weaving machine, close to a thread guide carrying the vanis? thread.

Preferably the vanis sector? 7? oriented transversely with respect to the front portion of the guide surface.

Preferably the vanis sector? 7? made by means of a chamfer (or relief), defining the aforementioned step 8, which falls from the guide surface towards the outside of the needle holder cylinder.

Preferably the step 8 defining the vanis sector? 7 defines an abutment surface 9 configured to radially contain the wire in vanis? positioned and sliding on the vanis sector? 7.

Preferably the vanis sector? 7 and the abutment surface 9 cooperate to guide said wire in vanis ?.

Preferably the vanis sector? 7 has an extension, in a radial direction with respect to the main axis of the needle holder cylinder, such as to contain at least a portion of a thickness of a vanis? Thread, preferably the entire thickness of a vanis? Thread, avoiding that such wire detaches from the insert as it approaches the main axis.

Preferably the vanis sector? 7 ends at the front on a front edge 7a and at the rear on a rear edge 7b.

Preferably the vanis sector? 7 develops longitudinally between an? Extremity? initial 7c, corresponding to the point where the thread in vanis ?, in the direction of feeding from the thread guide to the needles, begins to flow on the vanis? sector, and an end? 7d, corresponding to the point where the vanis? thread separates from the vanis? sector in the feed direction from the thread guide to the needles. and proceeds beyond it.

Preferably the vanis sector? 7? tilted down, the end? initial 7c being at an altitude pi? high compared to the extremity? final 7d.

Preferably the end? initial of the vanis sector? ? positioned, in the guide member, at a height equal to or greater than the vertical dimension of a meeting point between the trajectory of the heads of the rotating needles in the needle held position and the thread.

Preferably the end? initial 7c of the vanis sector? ? destined to constitute the initial point of contact between the wire in vanis? and the guide organ and the extremity? 7d final of the vanis sector? ? destined to constitute the terminal point of contact between the wire in vanis? and the guide organ.

Preferably the vanis sector? 7, on which? intended to run the thread in vanis ?,? configured to prevent contact and / or interference from the outside of the rotating needle heads with the vanis? thread.

Preferably step 8? configured to contain, in a radial direction with respect to the main axis, a vanis? wire, preventing it from moving in correspondence with the operating surface 5 or from moving radially beyond the abutment surface 9.

Preferably the operating surface? configured to radially contain the movement of the needles of the needle-holder cylinder, in particular any radial movements, towards the outside of the needle-holder cylinder, of the rotating needles.

Preferably the operating surface 5? destined to be positioned, when the guide organ? mounted to the textile machine, at a height corresponding to the maximum height reached by the needle tabs in rotation with the needle holder cylinder, and / or to the maximum height reached by the needle tabs when they come out of the? knitting surface ?.

Preferably the operating surface 5? configured to position itself in correspondence with the diameter traveled by the needle tabs during the rotation of the needle holder cylinder.

Preferably the insert 10? configured to route the wire in vanis? to the needles according to a specific configuration, in order to obtain a correct textile processing in vanis? by the thread in vanis? and the bottom thread.

Preferably the head of a needle shaped like a hook has a? Tip?, That is the end? of the needle itself that can be opened and closed by the tongue, and a? back ?, in correspondence of which the head? connected to the stem of the needle, the tip of the head being in the most position? external, that is more? distant from the main axis of the cylinder, while the back of the head being in the most position? internal, that is more? close to the main axis of the cylinder.

Preferably the textile processing in vanis? provides for the insertion of a pair of threads, i.e. a bottom thread and a vanis? thread, in the head of the same needle, the bottom thread being positioned towards the back of the needle head and the vanis? being positioned towards the tip of the needle head, so that the bottom thread is radially approached to the axis of the needle holder cylinder and the thread in vanis? is radially spaced from the cylinder axis.

Preferably the textile processing in vanis? creates a fabric characterized by an external side and an internal side.

Preferably, in the textile processing in vanis? the bottom thread (positioned towards the back of the needle head)? destined to be on the outer side of the fabric made, while the thread in vanis? (positioned towards the tip of the needle head)? destined to be on the inner side of the fabric made.

Preferably the vanis sector? 7? conformed, oriented and shaped to guide the wire in vanis? in such a way that it reaches the needle positioning itself, inside the head of the needle, towards the tip of the head itself, i.e. in a radially more position. external with respect to the position assumed by the bottom thread in the head of the same needle, the bottom thread positioning itself towards the back of the head itself, i.e. in a radially more position. close to the axis of the needle cylinder.

In one aspect, the vanis? Sector, on which the vanis? configured to prevent contact (and / or interference or interaction) of the rotating needles (in particular of the needle heads) with the vanis? thread.

Preferably the operating surface? configured to radially contain the motion of the needle tongues of the needle holder cylinder.

Figure 10 shows a further embodiment of the insert 10 according to the present invention, which differs from the embodiment of Figures 1-9 in that it does not have the vanis sector on the guide surface 4. The insert of the embodiment of figure 10? therefore equipped with a front portion 11 of the guide surface 4 which extends vertically without bevels or interruptions from the lower edge 11a to the upper edge 11b.

Preferably the body 2 of the wire guide member 1 comprises:

- a fixing portion 28 configured to allow fixing of the guide member to a fixed structure of a circular weaving machine;

- an operating portion 29 on which the operating surface 5 and the mounting section 20 for the insert are defined, the operating portion 29 being designed to face a portion of the needle holder cylinder frontally.

Preferably the fixing portion 28 and the operative portion 29 are integral with each other. Preferably the body 2 of the guide member? a monobloc body, i.e. made in a single piece.

Preferably, the guide member 1 comprises fixing means (not shown), for example one or more? screws, configured to mount the fastening portion 28 to the circular weaving machine. In a possible embodiment, the fixing portion 28 can be be fixed, preferably in a removable way, to a yarn guide assembly of a textile machine.

In use, preferably the guide member of the present invention is recorded both in height, ie along a direction parallel to the main axis of the needle-holder cylinder, and radially, ie in terms of distance from the main axis.

The present invention also relates to a? Kit? (i.e. equipment) for textile machinery comprising:

- a single body 2 of a guide member 1;

- a plurality? of inserts 10;

in which each insert 10 of the plurality? of inserts has at least its own guide surface 4 shaped according to the characteristics of the textile processing that is to be carried out with the textile machine and / or according to the characteristics of the feeding threads that the insert? intended to guide during textile processing.

The kit? configured to allow the selection of a specific insert 10 among the plurality of of inserts, to be mounted on the single body 2 to realize a guide member 1 having certain characteristics according to the selected insert.

Basically, the kit includes a body and a set of inserts, all interchangeable and mountable on the body, and each with its own characteristics (eg shape of the guide surface, material, etc.); According to the needs ? it is therefore possible to decide, in use, which insert 10 to mount to the body 2 to make the guide member 10 operative.

The present invention also relates to a further? Kit? for textile machines comprising:

- a plurality? of bodies 2 for guide members of the threads;

- a single insert 10;

in which each body 2 of the plurality? of bodies has certain dimensional characteristics linked to certain specifications of the textile machine to which? intended, said specifications being - for example - the model of the textile machine and / or the diameter of the textile machine and / or the type of thread feeds of the textile machine.

The kit? configured to allow the selection of a determined body 2 among the plurality? of bodies, and the insert 10? unique for all the plurality? of bodies. The insert? universally mountable to each of the bodies, to provide a guide member 1 having certain characteristics on the basis of the selected body.

A textile machine according to the present invention is now described, in particular of the circular type for knitting, hosiery or the like. The textile machine includes:

- a fixed structure;

- at least one needle-holder cylinder rotatably mounted in the supporting structure; - a plurality? of needles supported by the needle cylinder and movable parallel to an axis of rotation of the needle cylinder to produce a knitted fabric; - at least one guide member 1 according to the present invention, mounted to the fixed structure in such a way as to be positioned externally to the needle holder cylinder.

Preferably, the fixed structure comprises a support ring extending circumferentially around the needle-holder cylinder (ie arranged around the needle-holder cylinder and concentric thereto), the guide member being mounted to this support ring. Preferably, the support ring is part of the weaving head of the weaving machine.

Preferably, the textile machine comprises a plurality of materials. of guide members, distributed - preferably evenly - on the support ring and each positioned in correspondence with a respective feed point, or? fall ?, of the textile machine.

Preferably, the textile machine comprises a plurality of materials. of devices for feeding yarn to the needles, or? yarn guide groups?, each comprising a plurality of yarn feed members, or? yarn guides? . Each of the yarn guiding groups? mounted to the support ring at a respective feed point, or drop point, of the textile machine. Preferably, each guide member? mounted to a respective yarn guide assembly.

The present invention also relates to a method for carrying out a textile processing. This method includes the following steps:

- providing a textile machine, preferably of the circular type;

- prepare one or more? feed threads, delivered by thread guides of the textile machine;

- providing at least one guide member of the yarns 1 according to the present invention; - feeding the needles of the textile machine with said one or more? power wires; - make knitting stitches.

Preferably, the step of feeding the needles of the weaving machine comprises a step of guiding or directing the thread or threads, by means of the guiding surface of the guide member 1, in their path from the thread guides to the needles of the weaving machine.

The present invention includes alternative forms, different from the exemplary form shown in the figures, in terms of size, shape and / or orientation of the guiding surface, all sharing the function of guiding the threads. The size, shape and / or orientation of the guiding surface may vary depending on the application, for example according to the size of the cylinder, the fineness of the needles, the fineness of the machine (quantity of needles per inch of the needle bed) and / or according to the yarn guides that supply the yarns.

The invention achieves important advantages. First of all, the invention allows to overcome at least some of the drawbacks of the known art.

The thread guide member 1 object of the present invention allows the threads to be guided in such a way that they correctly reach the heads of the needles and produce the stitch in an optimal way. Furthermore, the guide member 1 of the present invention allows to protect the threads from the passage of any bent or crooked needles.

The guiding member of the present invention integrates in a single device the traditional function of keeping the tabs of the needles open with the innovative function of guiding and directing the trajectories of the threads coming from the thread guides and directed to the needles. The present invention makes it possible to have a precise reference, represented by the guiding surface, which is used to correctly guide the feeding wires.

Furthermore, a fundamental advantage obtained by the present invention? that of being able to have an element - the insert - that is responsible for guiding / defining the trajectories of the wires and at the same time? interchangeable and easily replaceable. There? brings numerous benefits from a technical point of view. First of all, consider that the portion of the guide organ that is responsible for guiding the trajectories of the wires? the one most subject to wear phenomena. These phenomena are undesirable since? lead to deterioration or damage of the guide member, which - in the known art - requires the replacement of the entire guide member, with a considerable cost, and also entails a further economic expenditure due to the complex replacement operations and the relative machine stop. The pressure of the wires on the guide member? present, and necessary for the correct direction of the yarns and for their descent with the needles when the latter are lowered due to the effect of the mesh cams. causes continuous wear and consequent damage to the needle holder. An additional reason for wear? given by the abrasive characteristics of certain yarns, for example of a technical type, and the speed? high levels of machining of the machine, and therefore of wire sliding. All of this? ? solved by the guide member with insert according to the present invention, which allows easy replacement of only the portion which is responsible for guiding the threads. So, in case of wear, can it? the insert alone can be easily replaced, without having to intervene on the body of the guide member. There? it translates into considerable savings both in terms of time and in terms of costs. Again, the replacement of the insert alone does not require a new registration of the entire guide organ, but? only a calibration of the position of the insert itself, which as illustrated above? particularly simple and quick thanks to the presence of the assembly seat and the parts for assembling the insert to this seat.

Furthermore, the possibility? replacing only one insert allows you to select it from a range of possible inserts, each with certain characteristics of the guiding surface that make it suitable for particular textile operations or yarns to be managed. For example, setting up the textile machine for the creation of a specific garment,? Is it possible to equip the guide organs with specific inserts for the type of mesh that will be used? to realize.

In addition, the present invention lends itself optimally to the improvement of the management costs of the articles and of the component warehouse connected to the management and use of textile machines. In fact, do you think that there may be dozens of different textile machines, each one destined to particular processes or textile articles, as well as? different versions of the same; furthermore, for each machine there may be different diameters of the needle holder cylinder. Well, each type of machine or version in the catalog requires its own guiding elements, and the replacement of the traditional guiding elements, for example due to wear of the guiding surface, requires having spare parts for each machine. By means of the present invention, on the other hand, only one type of insert can? be substantially universal and be mounted to a series of different guide member bodies. Basically, the insert of the present invention? interchangeable and easily replaceable, even for dozens of different guiding parts.

Also the cost associated with the materials or surface treatments necessary to increase hardness? significantly reduced: in fact in the known art? it is necessary to realize the entire guide member with certain characteristics in terms of material or finish, while with the present invention? It is possible to act only on the insert (which is the part subjected to contact with the wires and which therefore needs to meet particular technical specifications), which represents - dimensionally - a small fraction of the entire guiding organ.

The present invention allows to reduce the configuration and maintenance times of the textile machine and to increase productivity. Furthermore, ? It is possible to limit positioning errors and facilitate maintenance operations.

Overall, you get a pi? efficient textile processing and in particular? possible to obtain high quality fabrics? and uniformity. Finally, the guide member of the threads of the present invention? characterized by a competitive cost and a simple and rational structure.

Claims (16)

CLAIMS 1. Guide member (1) for threads of a circular weaving machine, said guiding member (1) being intended to be mounted on a fixed structure of a circular weaving machine, so as to be positioned externally to a cylinder carrying needles of the circular weaving machine housing a plurality of of needles and rotatable around a main axis of the needle holder cylinder, the guiding member (1) comprising a body (2) of the guiding member having at least one operating surface (5) intended to face the needle-holder cylinder and to extend around at least an angular portion of the needle-holder cylinder , said operating surface (5) being configured to keep the tabs of the needles open, in rotation with the needle holder cylinder, during the passage of the needles in front of the operating surface, and to define the paths of the threads, said operating surface (5) being intended to be positioned in correspondence with a point of thread feeding to the needles, in such a way that the tabs of the needles are kept open and the needles are able to receive the respective thread or the respective threads, the guide member (1) further comprising an insert (10), distinct from said body (2) and mountable thereto, said insert (10) being equipped with at least one guide surface (4) configured - in use - for receiving sliding on it at least one feed thread, carried by a thread guide of the textile machine, said guide surface (4) being configured to guide and / or direct said at least one feed thread in its path from the thread guide to the machine needles textile. Guide member (1) according to claim 1, wherein the insert (10)? removably mountable to the body of the guide member (1), and / or in which said at least one wire slides on at least a portion of the guide surface (4), and / or in which the guide surface (4) of the insert ? configured to at least partially deviate, on the basis of a geometry of the guiding surface itself, the trajectory of the thread to convey it towards the needles. Guide member (1) according to claim 1 or 2, wherein said sliding of said at least one feed thread on the guiding surface (4) occurs with contact of the feed thread on at least a portion of the guiding surface (4 ), and / or in which the guide surface is, in use, subjected to the passage of one or more? feeding threads, to guide their trajectory from the thread guides to the needles of the textile machine, said guide surface (4) being the portion of the guide member (1) subjected to wear due to the sliding of the threads, said insert (10) being interchangeable and replaceable to allow to equip the guide member (1) with a new guide surface (4). Guide member (1) according to any one of the preceding claims, wherein the guide surface (4)? configured to intercept and guide the yarns supplied by the yarn guides in an intermediate position between an upstream side, from where the yarns are delivered, to a downstream side, where the yarns engage with the needles, set in motion by the knitting cams due to the rotation of the needle holder cylinder, and / or in which the insert (10)? mounted to the body (2) of the guiding member in such a way that the guiding surface (4) follows the operating surface (5) with respect to the direction of rotation of the needle holder cylinder, and / or in which the guiding surface ( 4) follows the operating surface (5) with continuity? with respect to it, in such a way as not to interfere with the passage of the needles and / or the needle tabs, and / or in which the insert (10) includes an end? inferior and / or lateral, preferably of pointed shape, on which? defined at least an initial portion of said guide surface (4), said end? being destined to be flanked to, and turned towards, said operating surface (5), so that the end? basically follows with continuity? the operating surface (5) along the direction of rotation of the needle-holder cylinder, and / or in which said end? ? configured to be, with the insert (10) mounted to the body (2) of the guiding member, at least partially below the operating surface (5), and / or in which said end? ? configured to result, with the insert (10) mounted to the body (2) of the guide member, at least partially covered, or overhung, by a portion of the body (2) on which? defined a term of the operational surface (5), to obtain a continuity? between the operating surface (5) and the guiding surface (4). Guiding member (1) according to any one of the preceding claims, wherein the guiding surface (4) of the insert (10)? shaped according to certain characteristics of the textile processing to be carried out with the textile machine and / or according to the characteristics of the feeding threads that the insert? intended to guide during textile processing. Guide member (1) according to any one of the preceding claims, in which the guiding surface (4) comprises a front portion (11) facing the needle-holder cylinder and facing the needles, and / or in which the portion front (11) develops entirely on a single vertical plane parallel to the main axis of the needle holder cylinder, and / or in which the guiding surface (4) includes a lateral portion (12) extending laterally with respect to the front portion (11 ) and before it with respect to the direction of rotation of the needle holder cylinder, and / or in which the lateral portion (12) of the guiding surface (4) develops continuously. from the front portion (11), and between them? defined and shared a contact edge (13), the lateral portion (12) forming an angle with the front portion (11) in such a way as to extend, starting from the contact edge (13), away from the needles and towards a side of origin of the yarns dispensed by the yarn guides, and / or in which the lateral portion (12)? facing said upstream side, from where are the yarns delivered, and / or where the guiding surface (4)? shaped in such a way that the wires interact with it by sliding in contact at least partially on said front portion (11) and / or on said side portion (12), and / or in which the wires slide on the front portion (11) and / or on the lateral portion (12) of the guiding surface according to the trajectory of the yarns and the position of the yarn guides and knit cams. Guide member (1) according to any one of the preceding claims, in which the insert (10) has a front side (14), at which? the guide surface (4) is defined, and a mounting portion (16), preferably placed at a rear side (15) of the insert, comprising members for the removable assembly of the insert (10) to the body (2) of the guide member, and / or in which the body (2) comprises a mounting section (20) configured to at least partially receive said members for mounting the insert, in which the mounting of the insert (10) to the body (2) takes place according to a determined positioning, and in which said mounting section (20) and said mounting members allow a registration of said positioning, and / or in which the positioning registration comprises an adjustment of the radial position of the surface of guide (4), moving away from or approaching the main axis, and / or an adjustment of the lateral position of the guiding surface (4), in a circumferential direction with respect to the distribution of the needles of the needle-holder cylinder, and / or in an axial direction, substantially parallel to the principal axis. Guide member (1) according to any one of the preceding claims, wherein the mounting section (20) of the body (2) comprises a mounting seat (21) and the members for mounting the insert (10) comprise a relief (17), having the shape of a notch or pin, configured to be inserted in said mounting seat (21) to carry out the mounting of the insert to the body according to said determined positioning, and in which the mounting seat (21)? configured to allow, once the relief of the insert? inserted in it, the registration of the position of the relief (17) to determine said positioning of the insert (10) with respect to the body (2), and / or in which the registration of the positioning of the insert (10) with respect to the body ( 2) determines the position of the guiding surface (4) with respect to the needle holder cylinder, and / or in which the mounting seat (21) has a cavity conformation? or recess and extends radially between a front stop (A), facing the needle holder cylinder, and a rear stop (B), radially away from the front stop. Guide member (1) according to the preceding claim, in which the relief (17) extends between a front edge (18), facing the needle cylinder, and a rear edge (19), radially away from the front striker, and / or in which the distance between the front striker (A) and the rear striker (B) of the mounting seat (21)? greater than the distance between the front edge (18) and the rear edge (19) of the relief (17) of the insert, and / or where, in relief inserted (17) in the mounting seat (21),? present a free space (22) that can? be between the front edge (18) and the front stop (A) and / or between the rear edge (19) and the rear stop (B), and / or where the radial extension of the mounting seat (21)? greater than the radial extension of the relief (17), and the difference between the radial extension of the mounting seat (21) and the radial extension of the relief (17)? equal to said free space (22). Guide member (1) according to the preceding claim, wherein the free space (22) has a radial extension equal to the sum of the distance between the front edge (18) and the front stop (A) and the distance between the edge posterior (19) and the posterior abutment (B), and in which the relief (17) pu? be positioned in the assembly seat (21) in a radial position as desired between an advanced position, in which the leading edge? in abutment on the front striker, and a backward position, in which the rear edge? against the rear stop, and / or in which the free space (22) in the forward position? present only between the rear edge (19) and the rear stop (B), and coincides with the distance between the rear edge and the rear stop, while in the rear position the free space (22)? present only between the front edge (18) and the front stop (A), and coincides with the distance between the front edge and the front stop, and / or which in an intermediate mounting position between the forward position and the rear position, the relief (17)? inserted in the assembly seat (21) without the front edge (18) touching the front stop (A) and without the rear edge (19) touching the rear stop (B), thus being there is a free space between the front edge and the front stop and a respective free space between the rear edge and the rear stop, the sum of these two free spaces being equal to the difference between the extension of the assembly seat and the extension of the relief . Guide member (1) according to any one of claims 8 to 10, wherein the insert (10) can? be mounted to the body (2) in any position, with the relief (17) of the insert placed in the mounting seat (21) in a position between the forward position and the rear position, or coincident with one of them, and / or in which the relief (17) of the insert (10) and the mounting seat (21) are configured to allow an adjustment of the mounting of the insert to the body of the guide member, in particular along a radial direction with respect to to the main axis of the needle holder cylinder, and / or in which the body (2) of the guide member (1) includes a fixing hole (25) for the insert and the insert (10) includes a fixing (26), preferably of the threaded type, configured to fit into the fixing hole and fix the position of the insert with respect to the body, with the relief (17) in the mounting seat (21). Guide member (1) according to any one of the preceding claims, wherein the guide member body (2)? made of metal material, preferably steel, and in the insert (10)? made of a material resistant to the wear of the sliding wires, preferably a material with high hardness, and / or in which the insert (10)? made of metal material, preferably steel, or zirconium, or ceramic material, or a material coated with a wear-resistant film, in which the film? applied to the insert by means of a physical vapor deposition (PVD) process. Guide member (1) according to any one of the preceding claims, wherein the guide surface (4) of the insert (10) comprises a vanis sector? (7) configured to guide a vanis? Thread, or vanis? Thread, carried by a thread guide of the weaving machine, called vanis? scrolling on the vanis sector? (7) to form, together with a background thread, a textile processing in vanis ?, and / or in which the vanis? (7)? defined by a step (8) falling back from the guiding surface away from the main axis of the needle holder cylinder, and / or in which the sector vanis? (7)? positioned, in the guiding member, in such a way as to be, with the guiding member (1) mounted to the weaving machine, next to a thread guide carrying a vanis? thread, and / or in which the vanis? (7)? made by means of a chamfer, defining said step (8), which falls from the guide surface towards the outside of the needle holder cylinder, and / or in which the step (8) defining the vanis sector? (7) defines an abutment surface (9) configured to radially contain the wire in vanis? positioned and sliding on said vanis sector ?. 14. Textile machine kit comprising: - a single body (2) for a guide member (1), the body having at least one operating surface (5) intended to face the needle cylinder and to extend around at least an angular portion of the needle cylinder, said operating surface (5) being configured to keep the needles tabs open, in rotation with the needle holder cylinder, during the passage of the needles in front of the operating surface, and to define the paths of the threads, said operating surface (5) being intended to be positioned at a point of thread feeding to the needles, so that the tabs of the needles are kept open and the needles are able to receive the respective thread or threads; - a plurality? of inserts (10) for guiding members (1), distinct from said body (2) and mountable thereto, in which each insert (10)? equipped with at least one guiding surface (4) configured - in use - to receive sliding on it at least one feed thread, carried by a thread guide of the textile machine, said guiding surface (4) being configured to guide and / or directing said at least one feed thread in its path from the thread guide to the needles of the weaving machine; wherein each insert (10) of said plurality of inserts has at least its own guiding surface (4) shaped according to the characteristics of the textile processing to be carried out with the textile machine and / or according to the characteristics of the feeding threads that the insert? intended to guide during textile processing; where the kit? configured to allow the selection of a certain insert (10) in said plurality? of inserts, to be mounted on said single body (2) to make a guide member (1) having certain characteristics based on the insert (10) selected. 15. Textile machine kit comprising: - a plurality? of bodies (2) for guide members, in which each body (2)? equipped with at least one operating surface (5) intended to face the needle-holder cylinder and to extend around at least an angular portion of the needle-holder cylinder, said operating surface (5) being configured to keep the needle tongues open, in order to rotation with the needle holder cylinder, during the passage of the needles in front of the operating surface, and to define the trajectories of the threads, said operating surface (5) being intended to be positioned in correspondence with a point of feeding thread to the needles, in such a way that the tabs of the needles are kept open and the needles are able to receive the respective thread or threads; - a single insert (10) for guiding members (1), distinct from said bodies (2) and configured to be mounted to each of them, the insert (10) being equipped with at least one guiding surface (4) configured - in use - to receive at least one feed thread running on it, carried by a thread guide of the textile machine, said guide surface (4) being configured to guide and / or direct said at least one feed thread in its path from the thread guide to the needles of the textile machine; in which each body (2) of said plurality? of bodies has certain dimensional characteristics linked to certain specifications of the textile machine to which? intended, said specifications being the model of the textile machine and / or the diameter of the textile machine and / or the type of thread feeds of the textile machine; where the kit? configured to allow the selection of a determined body (2) in said plurality? of bodies, said insert (10) being unique for all the plurality? of bodies and being universally mountable to each of them, to provide a guide member (1) having certain characteristics based on the selected body. 16. Textile machine, in particular of the circular type for knitting, hosiery or the like, comprising: - a fixed structure; - at least one needle-holder cylinder rotatably mounted in said supporting structure; - a plurality? of needles supported by said needle-holder cylinder and movable parallel to an axis of rotation of the needle-holder cylinder to produce a knitted fabric; - at least one guiding member (1) according to any one of claims 1 to 13, or a guiding member (1) made with a kit for textile machines according to claim 14 or 15, mounted to the fixed structure in such a way as to be positioned outside the needle holder cylinder.