WO2011007243A1

WO2011007243A1 - Independent device for joining textile threads or yarns

Info

Publication number: WO2011007243A1
Application number: PCT/IB2010/001734
Authority: WO
Inventors: Marco Turchi
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-07-15
Filing date: 2010-07-15
Publication date: 2011-01-20
Anticipated expiration: 2012-01-15
Also published as: HRP20130990T1; ITMO20090182A1; CN102498053B; IT1395522B1; ES2433103T3; CN102498053A; EP2454181A1; EP2454181B1

Abstract

The independent device for joining textile threads or yarns comprises a containment body, pneumatic joining means for joining two textile threads or yarns associated with the containment body and at least a rechargeable compressed-air tank (3), housed in the containment body (2) and connectable to at least a compressor, the joining means (4) being operatively connectable to the tank (3).

Description

INDEPENDENT DEVICE FOR JOINING TEXTILE THREADS OR YARNS

Technical Field

The present invention relates to an independent device for joining textile threads or yarns.

Background Art

It is known how textile machines or coners are generally fitted with devices for the pneumatic joining of two textile threads or yarns.

More in particular, these devices are suitable for joining together two threads, e.g. in the case of breakages of same during the manufacture of a garment or to restore the continuity of the thread or yarn being worked on a coner in case of its being interrupted due to a voluntary elimination of faulty sections, to accidental breakage or to the termination of the pirn from which the thread is being unwound.

These devices are of the fixed type and are generally connected to the compressed-air line of the relative textile machine.

The use of these devices known for the pneumatic joining of threads has become increasingly more frequent during the course of the years.

The presence of the joining devices on textile machines or on coners does however have a number of drawbacks.

In fact, equipping each textile machine or coner with a joining device obviously has a consequent economic cost, which increases according to the number of machines which a company has and which therefore affects the price of the finished product.

Furthermore, the joining devices of known type are very complex both from a construction and a functional viewpoint, and can therefore be subject to breakages or malfunctions which consequently require maintenance jobs. The larger the number of joining devices used, the higher the number of jobs required.

The maintenance jobs aimed at restoring the correct operation of the joining devices, besides also involving high costs, also involves corresponding machine down times that therefore limit productivity. For this reason, portable devices have been conceived comprising a supporting frame with wheels and at least a compressed-air storage tank that can be connected at one end to a pneumatic joining device and at the other end to a compressed-air line, e.g., the compressed-air line of the factory where the textile machines or coners are located, for filling the above-mentioned tank.

Notwithstanding the fact that this type of known portable device allows reducing the number of joining devices at the disposal of each machine and moving these inside the factory according to requirements, it also however has a number of drawbacks.

In fact, these portable devices are distinguished by lack of operating flexibility and are not easy to use.

More precisely, the far from negligible overall dimensions of the compressed- air storage tank and of the relative support structure make difficult the transit in confined spaces, often existing between one machine and another or along the pathways inside a factory.

The dimensions of the storage tank and the need to connect the latter to an external supply line causes a number of problems due in particular to the need to move the device to reach the compressed-air supply line or simply to move it from one machine to another.

This movement difficulty and therefore the difficulty in using portable devices of known type, inevitably translates into a slowdown in work times and consequently in productivity.

The portable devices of known type do not therefore allow finding a functional balance between overall dimensions and operating autonomy.

Object of the Invention

The main aim of the present invention is to provide an independent device for joining textile threads or yarns, which can be moved inside a plant, between a machine and another, in an easier and more practical way than the devices of known type.

An object of the present invention is to provide an independent device which is portable without the aid of supporting structures or the like and therefore of reduced overall dimensions, and which at the same time has an operating autonomy comparable to that of the devices of known type.

Another object of the present invention is to provide a joining device which is independent of external supply sources.

Another object of the present invention is to provide an independent device for joining textile threads or yarns which allows obtaining a greater productivity with respect to known portable devices.

The above objects are all achieved by the present independent device for joining textile threads or yarns, characterised by the fact that it comprises:

a containment body;

- pneumatic joining means for joining two textile threads or yarns associated with said containment body;

at least a rechargeable compressed-air tank housed in said containment body and connectable to at least a compressor;

said joining means being operatively connectable to said tank.

Brief Description of the Drawings

Other characteristics and advantages of the present invention will become more evident from the description of a preferred, but not sole, embodiment of an independent device for joining textile threads or yarns, illustrated purely as an example but not limited to the annexed drawings in which:

figure 1 is a perspective view of the device according to the invention in a first embodiment;

figure 2 is a longitudinal section of the device of figure 1;

figure 3 is a perspective view of the device according to the invention in a second embodiment;

figure 4 is a longitudinal schematic section of the device of figure 3;

figure 5 is a plan view from above of the device of figure 3 with two threads or yarns inserted to join together.

Embodiments of the Invention

With reference to such figures, globally indicated by 1 is an independent device for joining textile threads or yarns.

The present treatise describes two different embodiments, represented in the figures 1, 2 and in the figures 3, 4 and 5 respectively. The elements common to both the embodiments, i.e., which cany out the same functions, are identified in the illustrations by the same reference numbers.

According to the invention, the device 1 comprises an internally hollow containment body 2, e.g., made of plastic or the like, and pneumatic joining means 4 of two threads or yarns Fl and F2 associated with the body 2.

The device 1 also comprises a rechargeable compressed-air tank 3, housed inside the body 2 and connectable to at least a compressor or to a compressed- air line. The body 2 has dimensions such as to be easily gripped by an operator. Advantageously, the device 1 comprises opening/closing means 30 for opening/closing the tank 3 suitable for allowing/preventing the release of the compressed air from the tank itself.

More in particular, the opening/closing means 30 comprise at least one valve 8 placed between the tank 3 and the joining means 4 and controllable in opening to allow the outflow of the compressed air from the tank 3 towards the joining means 4.

The opening/closing means 30 are therefore suitable for placing in communication/isolating the tank 3 and the joining means 4.

In the first embodiment shown in figure 2, the valve 8 is of the mechanical type and comprises a shutter 31 mobile inside a relevant seat obtained in the body 2 and the opening/closing means 30 comprise at least a control element 32 of the valve 8 which can be operated manually.

More in particular, the control element 32 is of the type of a button mechanically connected to the shutter 31, the latter being shaped so as to open/close the valve 8 according to its position inside the relevant seat. The pressure applied on the control element 32 causes the opening of the valve 8 and therefore the release of the compressed air from the tank 3 towards the joining means 4.

In this first embodiment, the device 1 comprises removable connection means 35 with a compressor or with an external compressed-air line. The connection means 35 are communicating with the tank 3 to allow this to be filled.

More in particular, the tank 3 has dimensions such as to contain enough compressed air to make a plurality of joinings, so as to provide the device itself with a fair amount of autonomy.

Preferably, the device 1 also comprises a closing element 36 associated in a removable way with the body 2 and configured so as to protect the connection means 35. The closing element 36 is then removed by the operator every time the tank 3 has to be connected to a compressor or to an external compressed-air line.

Alternatively, as shown in the second embodiment shown in the figures from 3 to 5, the compressor can also be contained inside the body 2.

More in particular, in the second embodiment shown in the figures from 3 to 5, the device 1 also comprises at least a compressor 5, housed inside the body 2 and suitable for filling the compressed-air tank 3 and activation means of the compressor 5, these also associated with the body 2.

Preferably, inside the tank 3 is contained a pressure sensor operatively connected to the compressor 5 and suitable for starting it when the pressure inside the tank drops below a preset value. This way, therefore, the compressor 5 automatically recharges the tank 3 when this is empty.

In this second embodiment, the tank 3 can contain enough air to make a plurality of joinings, as described for the first embodiment, or, alternatively, it can contain enough air to make just one joining, so as to reduce overall dimensions to the utmost.

In the second embodiment of the device according to the invention, the compressor 5 comprises at least a first electric motor 7 and the activation means are made up of an electric battery 6.

Advantageously, the battery 6 is of the rechargeable type.

Furthermore, the battery 6 is suitably associated in a removable way with the body 2, so as to allow its removal and replacement when it is run-down.

In the second embodiment shown in the figure 4, the valve 8 positioned inside the body 2 between the tank 3 and the joining means 4 is of the solenoid valve type and consequently its operation is controlled by sending an electric signal, as explained in greater detail below.

The solenoid valve 8 is controllable in opening to allow the compressed air to flow out of the tank 3 towards the joining means 4. Advantageously, in both embodiments shown, the joining means 4 are associated in a removable way with the body 2 so as to allow its easy replacement in case of breakage or malfunction, or only just to change the type. The pneumatic joining means 4 are associated with a support element 9 and comprise a joining chamber 10 open at the top, having side openings 11 for the insertion and the exit of the threads or yarns Fl and F2 to be joined and connectable to the tank 3 by means of a compressed-air flow pipe 12. More in particular, the pipe 12 is placed in communication with the tank 3 by means of the opening of the valve 8.

The joining element, associated with the support element 9, which defines the chamber 10 is identified in the illustrations by the reference number 13.

The joining means 4 also comprise an upper closing element 14 of the chamber 10 and cutting means 15 of the portions of threads or yarns Fl and F2 exiting from the chamber 10.

At least one between the closing element 14 and the cutting means 15 is moving between an idle configuration, wherein it is moved away from the chamber 10 to allow inserting the threads or yarns Fl and F2, and an active configuration, wherein it is moved close to the chamber 10 with respect to the idle configuration to allow the joining of the threads or yarns Fl and F2.

Suitably, the device 1 comprises movement means 16 of at least one between the closing element 14 and the cutting means 15. Advantageously, the cutting means 15 are integrally associated with the closing element 14 and are therefore both moving between an idle configuration and an active configuration.

More in particular, the chamber 10 is open at the top with the closing element 14 in the idle configuration and is closed at the top with the closing element 14 in the active configuration.

Preferably, the chamber 10 has an elongated shape and the cutting means 15 are arranged aligned and parallel with each other on opposite sides with respect to the chamber 10 so as to contact both the threads or yarns Fl and F2. The cutting means 15 are also arranged asymmetrically with respect to the longitudinal median plane of the chamber 10, i.e., they are arranged misaligned with respect to the longitudinal axis of the chamber itself. In both the embodiments shown in the illustrations, the cutting means 15 comprise a pair of cutting blades 17, arranged on opposite sides with respect to the chamber 10, each of which is suitable for cutting the corresponding portion of thread or yarn Fl, F2 exiting from the chamber itself.

Advantageously, the cutting means 15 of the device 1 are of the pressure type. More in particular, the joining means 4 comprise a fixed locator element 18 against which rest the cutting means 15 in active configuration. The joining means 4 therefore comprise two locator elements 18 connected to the support element 9, each of which defines a relevant locator surface 18a for each cutting blade 17.

In the idle configuration of the cutting means 15, the cutting blades 17 are therefore raised with respect to the respective locator surfaces 18a, while in the active configuration they rest on these to cut the portions of the threads or yarns Fl and F2 exiting from the chamber 10.

The locator surfaces 18a are suitably arranged in correspondence to the walls of the joining element 13 which laterally delimits the chamber 10 and on which are defined the openings 11.

Advantageously, the cutting blades 17 are arranged, with the cutting means 15 in active configuration, in correspondence to the openings 11, so the cut extremities of the threads or yarns Fl and F2 are as close as possible to the chamber 10.

Alternatively, i.e., in the case wherein the cutting blades 17 are arranged at a distance from the openings 11, the cutting means 15 comprise a pair of withdrawal levers of the threads or yarns Fl and F2, not shown in the illustrations, suitable for moving the cut extremity of the threads Fl and F2 close to the chamber 10.

The movement means 16 of the closing element 14 and of the cutting means 15 can be operated manually.

Preferably, the movement means 16 are of the mechanical type.

More in particular, in the first embodiment shown in the figures 1 and 2, the movement means 16 comprise at least an articulated quadrilateral 33, wherein the closing element 14 represents a mobile rod. The articulated quadrilateral 33 thus comprises a fixed element 33a, composed of the body 2, two cranks 33b and a connecting rod 33c, the latter corresponding to the closing element 14. In an alternative embodiment, not shown in the illustrations, the movement means 16 are of the mechanical type and comprise a lever mechanism that can be operated manually by an operator and mechanically associated with the closing element 14. More in particular, such lever mechanism comprises a first rod hinged at one extremity to the body 2 and at the opposite extremity to a second rod in turn hinged to the closing element 14. In this embodiment, the closing element 14 has a fixed fulcrum associated with the support element 9 and a mobile fulcrum associated with the lever mechanism, and more in particular with the second rod.

In a further alternative embodiment, this neither shown in the illustrations, the movement means 16 are of the pneumatic type, i.e., the movement of the closing element 14 and of the cutting means 15 occurs by effect of the compressed air contained in the tank 3. In this embodiment, the pipe 12 comprises a branch suitable for conveying a part of the compressed air towards the closing element 14 and the cutting means 15.

In the second embodiment shown in the figures 3, 4, and 5, the movement means 16 comprise at least a second electric motor 19, associated with the support element 9 and suitable for operating in translation at least a mobile element 20 connected to at least one between the closing element 14 and the cutting means 15.

More in particular, the mobile element 20 is composed of a worm screw moved in translation by the second motor 19 and operating on the closing element 14. In this embodiment as well, the closing element 14 has a fixed fulcrum 21, hinged to the support element 9, and a mobile fulcrum 22 that cooperates with the mobile element 20 and is moving in translation along a slot 23 integral with the mobile element itself.

Advantageously, the device 1 also comprises operating means for manually operating the second electric motor 19.

More in particular, the operating means are made up of a control button 24, which can be operated by an operator and operatively connected to the second motor 19.

In this second embodiment, the opening/closing means 30 of the tank 3 comprise a sensor operatively connected to the solenoid valve 8 and which can be operated once the cutting means 15 have reached the active configuration. More in particular, the sensor starts when the cutting means 15 reach the active configuration and opens the solenoid valve 8 to allow the compressed air contained in the tank 3 to flow out inside the pipe 12.

The solenoid valve 8 can stay open until the cutting means 15 return to idle configuration or can be connected to the sensor by means of a timer, this too not visible in the illustrations, suitable for defining the opening time of the solenoid valve itself.

Alternatively, the opening/closing means 30 can comprise at least a sensor operatively connected to the solenoid valve 8 and which can be operated by the second motor 19. In this alternative embodiment, therefore, the sensor commands the opening of the solenoid valve 8 following the operation of the second motor 19. The solenoid valve 8 can be operatively connected to a timer, not shown in the illustrations, suitable for delaying the opening of the solenoid valve itself with respect to the operation of the second motor 19 and/or keeping it open for a preset time, long enough to complete the joining of the threads Fl and F2. As an alternative to the presence of the timer, the solenoid valve 8 can be kept open by the sensor as long as the second motor 19 remains on.

The joining means 4 also comprise means for the temporary retention of the threads or yarns Fl and F2. The means of retention of the threads or yarns Fl and F2 are arranged on opposite sides of the joining chamber 10.

More in particular, the means of retention of the threads or yarns Fl and F2 comprise first retention means 25a, 25b suitable for retaining the first thread or yarn Fl and second retention means 26a, 26b suitable for retaining the second thread or yarn F2.

In fact, each of the retention means 25a, 25b and 26a, 26b comprises a relevant first grip element 25a, 26a and a relevant second grip element 25b, 26b.

The first grip elements 25a and 26a are arranged on opposite sides of the respective second grip elements 25b and 26b with respect to the chamber 10 and with respect to its longitudinal median plane.

Again, the first grip elements 25a and 26a, just like the second grip elements 25b and 26b, are arranged aligned and parallel with one another and on the same side with respect to the longitudinal median plane of the chamber 10 but on opposite sides with respect to the latter.

More in particular, the first grip elements 25a and 26a are suitable for retaining the portion of the corresponding threads or yarns Fl and F2 entering the chamber 10, while the second grip elements 25b and 26b are suitable for retaining the portion of the corresponding threads or yarns Fl and F2 exiting from the chamber itself.

The threads or yarns Fl and F2 enter and exit therefore from opposite sides of the chamber 10, crossing over inside this, as can be seen in the illustration 3. In the preferred embodiment shown in the illustrations 1 and 2, each grip element 25a, 26a, 25b, 26b has a respective recess 34 with a substantially V shape. Each recess 34 is blind and converges as it approaches the chamber 10. Such conformation of the recess 34 ensures easy insertion of the threads or yarns Fl and F2 and their fastening by effect of the tensioning of same. More in particular, each recess 34 is defined by two fixed elements, staggered the one to the other, i.e., arranged at two different heights. This embodiment does not therefore envisage the use of any moving part.

In the second embodiment shown in the figures from 3 to 5, each grip element 25a, 26a, 25b, 26b, is preferably made up of a vice comprising a fixed part 27 and a moving part 28.

The moving part 28 of each vice is associated with contrast means, e.g., a helical spring not shown in the illustrations and having an extremity associated with the relevant moving part 28 and the opposite extremity connected to the support element 9, which push the moving part itself towards the corresponding fixed part 27. The positioning of the threads or yarns Fl and F2 inside the relevant retention means 25a, 25b and 26a, 26b occurs therefore by moving the relevant moving parts 28 away from the corresponding fixed parts 27 and then releasing the moving parts themselves, in such a way that these, by moving towards the respective fixed parts 27, secure the thread or yarn Fl, F2 placed between them.

The operation of the present invention is as follows.

The reduced dimensions of the device 1 allow the operator to easily transport it by gripping the body 2, so as to serve from time to time the textile machine or the coner having the need to join together two threads or yarns F 1 and F2.

The device 1 as shown in the illustrations is then moved by the operator in correspondence to the machine on which a job has to be performed.

The device 1 relating to the first embodiment shown in the figures 1 and 2 must be charged before being used. More in particular, this device 1 is connected by means of the connection means 35 to an external compressor, e.g., to the compressed-air line of the relative machine on which the job has to be performed, so as to fill the tank 3 with compressed air.

After charging the tank 3, the device 1 is removed from the relative compressed-air line; the device 1 can now be used independently, without the need for any accessory element, to perform a plurality of joinings of threads or yarns Fl and F2.

The device 1 relating to the second embodiment shown in the figures from 3 to 5, does not on the other hand require any connection to an external compressed- air line, because it already has a compressor 5 integrated in the body 2. This compressor 5 thus fills the tank 3 in an independent way.

Having thus positioned the device 1 on a relative textile machine or coner, the threads or yams Fl and F2 must be arranged to join on the joining means 4. More in particular, the threads or yarns Fl and F2 are made to pass through the chamber 10 inserting them from opposite sides of the chamber itself.

The thread or yarn Fl, therefore, enters the chamber 10 through an opening 11 and exits from the opposite opening 11 and the thread or yarn F2 enters the chamber 10 through the opening 11 from where the thread or yarn Fl exits and exits from the opposite opening 11; the threads or yarns Fl and F2 therefore cross one another inside the chamber 10.

The threads or yarns Fl and F2 are subsequently secured by means of the first and the second retention means 25 a, 25b and 26a, 26b respectively.

More precisely, the part of the thread or yarn Fl entering the chamber 10 is secured by the first grip element 25a and its part exiting from the chamber 10 is secured by the second grip element 25b.

In the same way, the part of the thread or the yarn F2 entering the chamber 10 is secured by the first grip element 26a and its exiting part by the second grip element 26b.

During the positioning of the threads or yarns Fl and F2, the closing element 14 and the cutting means 15 are in the raised configuration, so as to allow the insertion of the threads or yarns themselves inside the chamber 10 and their subsequent securing.

After securing the threads or yarns Fl and F2 these can then be joined.

In the first embodiment of the device according to the invention, the operator manually moves the closing element 14 from the idle configuration to the active configuration, thereby closing the chamber 10. At the same time, the cutting blades 17 rest against the respective locator surfaces 18a and cut the threads or yarns Fl and F2.

The operator, by keeping pressed the closing element 14 in the active configuration, operates the control element 32 in such a way as to open the valve 8 and place in communication the tank 3 with the joining means 4. This way, the air in the tank 3 comes out and flows through the pipe 12 until it reaches the inside of the chamber 10.

Following the joining of the threads or yarns Fl and F2, the operator releases the control element 32, thereby interrupting the flow of air inside the chamber 10 and returns the closing element to the idle configuration, so as to allow the extraction of the threads or yarns Fl and F2 now joined together.

After the threads or yarns Fl and F2 have been joined, the operator can remove their extremities from the respective recesses 34.

As soon as the tank 3 is empty and no longer therefore allows further joining, the operator recharges it by connecting it to a compressor or to an external compressed-air line by means of the connection means 35.

In the second embodiment, after securing the threads or yarns Fl and F2 by means of the grip elements 25a, 25b, 26a, 26b, the operator manually pushes the control button 24 that starts the second motor 19. The second motor 19 drives the mobile element 20 in translation and this moves the closing element 14 and the cutting blades 17 from the raised configuration to the lowered configuration.

Upon reaching the lowered configuration, the cutting blades 17 contact the respective locator surfaces 18a and cut the portions of the threads or yarns Fl and F2 exiting from the chamber 10.

As described above, depending on the embodiment, the reaching of the lowered configuration by the cutting blades 17 or the starting of the second motor 19 results in the operation of a corresponding sensor operatively connected to the solenoid valve 8 to command it to open. In the first case, the sensor trips as soon as the cutting blades 17 move to lowered configuration contacting the respective locator surfaces 18a, so the compressed air inside the tank 3 is sent to the pipe 12 only after the threads or yarns Fl and F2 have been cut and their extremities are therefore available for reciprocal joining inside the chamber 10. In this embodiment, the time during which the solenoid valve 8 remains open can be defined by a timer or by the cutting blades 17, i.e., the solenoid valve itself remains open until the cutting blades 17 are in lowered configuration. In the second case, i.e., when the solenoid valve 8 is controlled by a sensor connected to the second motor 19, this sensor can be connected to the solenoid valve 8 by means of a timer suitable for slightly delaying the opening to allow the cutting of the threads or yarns Fl and F2. In this embodiment, the duration of the emission of compressed air can be controlled by the timer itself or, if this is not fitted, by the second motor 19. In this latter case, the solenoid valve 8 remains open until the second motor 19 remains excited and therefore until the cutting means 15 and the closing element 14 remain in lowered configuration. The release of the button 18 by the operator results in the disabling of the second motor 19 and therefore the return of the closing element 14 and cutting means 15 to raised configuration.

In this second embodiment, as soon as the pressure of the air inside the tank 3 drops below a preset value, the pressure sensor inside this starts the first motor 7, and therefore the compressor 5, which allows the immediate recharging of the tank itself. The speed of recharge of the tank 3, which is very high, allows considerably reducing its overall dimensions and therefore upgrading its transportability. In the event of the battery 6 running down during use of the device 1, it can be removed from the body 2 and replaced with another already-charged one, or else can be recharged.

In the same way, in the event of the joining means 4 showing malfunctions or of more efficient versions being made, these can be removed from the body 2 and thus be replaced.

It has in fact been ascertained how the described invention achieves the proposed objects and in particular the fact is underlined that the independent device for joining textile threads or yarns according to the invention can be easily transported and positioned near any machine and does not require the presence of a constant and fixed connection to an external supply source, thus being completely independent and considerably practical.

In fact, the presence of a rechargeable tank allows the execution of a plurality of joinings without the aid of any fixed supply source, thereby allowing the easy and flexible use of the device itself.

Alternatively, the presence of the compressor integrated in the body of the device allows considerably reducing the dimensions of the compressed-air containment tank. More in particular, thanks to the speed of recharge allowed by the compressor, the tank can have very reduced dimensions such as to contain the quantity of air also needed to make a single joining.

The particular structure of the device 1 therefore allows obtaining extremely reduced dimensions and such as to permit an operator to hold it easily in one hand during transport and use.

Again, the complete independence of the device according to the invention, which makes it independent, at least during operation, from external supply sources, enables the device itself to operate in an almost continuous manner and, therefore, to achieve high productivity.

Claims

1) Independent device (1) for joining textile threads or yarns, characterised by the fact that it comprises:

a containment body (2);

- pneumatic joining means (4) for joining two textile threads or yarns (Fl,

F2) associated with said containment body (2);

at least a rechargeable compressed-air tank (3), housed in said containment body (2) and connectable to at least a compressor;

said joining means (4) being operatively connectable to said tank (3).

2) Device (1) according to claim 1, characterised by the fact that it comprises opening/closing means (30) for opening/closing said tank (3) suitable for allowing/preventing the release of the compressed air from the tank itself.

3) Device (1) according to claim 2, characterised by the fact that said opening/closing means (30) comprise at least one valve (8) placed between said tank (3) and said joining means (4), said valve (8) being controllable in opening to allow the outflow of the compressed air from said tank (3) towards said joining means (4).

4) Device (1) according to one or more of the preceding claims, characterised by the fact that it comprises at least a compressor (5) housed in said containment body (2) and suitable for filling said compressed-air tank (3).

5) Device (1) according to claim 4, characterised by the fact that it comprises activation means of said compressor (5) associated with said containment body

(2).

6) Device (1) according to one or more of the preceding claims, characterised by the fact that said compressor (5) comprises at least a first electric motor (7) and by the fact that said activation means comprise at least an electric battery (6).

7) Device (1) according to claim 6, characterised by the fact that said battery (6) is of the rechargeable type.

8) Device (1) according to claim 6 or 7, characterised by the fact that said battery (6) is associated in a removable way with said containment body (2). 9) Device (1) according to one or more of the preceding claims, characterised by the fact that said joining means (4) are associated in a removable way with said containment body (2).

10) Device (1) according to one or more of the preceding claims, characterised by the fact that said joining means (4) comprise at least a joining chamber (10), open at the top and having side openings (11) for the insertion and the exit of the threads or yarns (Fl, F2) to be joined and connectable to said tank (3), at least an upper closing element (14) of said chamber (10) and cutting means (15) for cutting the portions of threads or yarns (Fl, F2) coming out of the chamber itself.

11) Device (1) according to claim 10, characterised by the fact that at least one between said closing element (14) and said cutting means (15) is moving between an idle configuration, wherein it is moved away from said joining chamber (10) to allow inserting said threads or yarns (Fl, F2), and an active configuration, wherein it is moved close to said joining chamber (10) with respect to said idle configuration to allow the joining of said threads or yarns (Fl, F2).

12) Device (1) according to claim 11, characterised by the fact that it comprises movement means (16) of at least one between said closing element (14) and said cutting means (15).

13) Device (1) according to one or more of the preceding claims, characterised by the fact that said cutting means (15) are integrally associated with said closing element (14).

14) Device (1) according to one or more of the preceding claims, characterised by the fact that said cutting means (15) are of the pressure type.

15) Device (1) according to claim 14, characterised by the fact that it comprises at least a fixed locator element (18) against which rest said cutting means (15) in said active configuration.

16) Device (1) according to one or more of the preceding claims, characterised by the fact that said cutting means (15) are arranged in correspondence to said side openings (11) in said active configuration.

17) Device (1) according to one or more of the preceding claims, characterised by the fact that said movement means (16) can be operated manually. 18) Device (1) according to one or more of the preceding claims, characterised by the fact that said movement means (16) are of the mechanical type.

19) Device (1) according to one or more of the preceding claims, characterised by the fact that said movement means (16) comprise at least an articulated quadrilateral, said closing element (14) corresponding to a mobile rod of said articulated quadrilateral.

20) Device (1) according to one or more of the claims from 1 to 18, characterised by the fact that said closing element (14) has at least a fixed fulcrum (21) connected to said body (2) and at least a mobile fulcrum (22) connected to said movement means (16).

21) Device (1) according to one or more of the preceding claims, characterised by the fact that said movement means (16) comprise a lever mechanism associated with at least one between said closing element (14) and said cutting means (15).

22) Device (1) according to one or more of the claims from 1 to 17, characterised by the fact that said movement means (16) comprise at least a second electric motor (19) suitable for operating in translation at least one mobile element (20) connected to at least one between said closing element (14) and said cutting means (15).

23) Device (1) according to one or more of the preceding claims, characterised by the fact that said opening/closing means (30) comprise at least a control element (32) of said valve (8) which can be operated manually.

24) Device (1) according to one or more of the claims from 1 to 22, characterised by the fact that said valve (8) is of the type of a solenoid valve and by the fact that it comprises at least a sensor operatively connected to said solenoid valve (8) to control the opening thereof when said cutting means (15) reach the active configuration.

25) Device (1) according to one or more of the claims from 1 to 22, characterised by the fact that said valve (8) is of the type of a solenoid valve and by the fact that it comprises at least a sensor operatively connected to said solenoid valve (8) to control the opening thereof when said second electric motor (19) has been activated. 26) Device (1) according to one or more of the preceding claims, characterised by the fact that it comprises at least one pressure sensor inserted in said tank (3) and suitable for activating said compressor (5) when a preset pressure value is reached inside the tank itself.

27) Device (1) according to one or more of the preceding claims, characterised by the fact that it comprises retention means (25a, 25b, 26a, 26b) of said threads or yarns (Fl, F2) arranged on opposite sides of said joining chamber (10) and defining respective substantially V-shaped recesses (34).

28) Device according to claim 27, characterised by the fact that said recesses (34) converge towards said joining chamber (10).