IT202100015533A1

IT202100015533A1 - CONNECTION JOINT

Info

Publication number: IT202100015533A1
Application number: IT102021000015533A
Authority: IT
Inventors: Nicola Bonato; Marco Bragagnolo; Francesco Sabini
Original assignee: Metalmeccanica Alba Srl
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2022-12-15

Description

TITOLO: GIUNTO DI COLLEGAMENTO TITLE: CONNECTION JOINT

DESCRIZIONE DESCRIPTION

Il presente trovato ha per oggetto un giunto atto a permettere il collegamento tra loro di tre profili o elementi tubolari costituenti il telaio di supporto per strutture componibili, quali, ad esempio, un mobile, un tavolo, uno scaffale, una scrivania, una seduta. The present invention relates to a joint suitable for allowing the mutual connection of three profiles or tubular elements constituting the support frame for modular structures, such as, for example, a piece of furniture, a table, a shelf, a desk, a seat.

Oggigiorno ? noto collegare tali profili mediante saldatura delle estremit? degli stessi, ma tale procedura richiede l?impiego di attrezzatura specifica e non risulta reversibile se non tagliando i profili per poi risaldarli. Nowadays ? known to connect these profiles by welding the ends? of the same, but this procedure requires the use of specific equipment and is not reversible except by cutting the profiles and then re-welding them.

Oggigiorno ? anche nota la domanda di brevetto italiana UD2010A000187 nella quale si rivendica un giunto di collegamento per una pluralit? di elementi tubolari (12,14) di una struttura componibile (16), in cui almeno un primo elemento tubolare (12) ed un secondo elemento tubolare (12) sono disposti sostanzialmente complanari e convergono in uno spigolo di convergenza, ed un terzo elemento tubolare (14) ? disposto sostanzialmente ortogonale al primo ed al secondo elemento tubolare (12) e converge nello stesso spigolo di convergenza formando una struttura sostanzialmente a triedro, caratterizzato dal fatto che comprende almeno: Nowadays ? also known is the Italian patent application UD2010A000187 in which a connection joint for a plurality of of tubular elements (12,14) of a modular structure (16), in which at least a first tubular element (12) and a second tubular element (12) are arranged substantially coplanar and converge in an edge of convergence, and a third element tubular (14) ? arranged substantially orthogonal to the first and second tubular element (12) and converge in the same convergent edge forming a substantially trihedral structure, characterized in that it comprises at least:

- un corpo centrale (30) definente lo spigolo di convergenza fra i tre elementi tubolari (12, 14); - a central body (30) defining the corner of convergence between the three tubular elements (12, 14);

- un primo profilo (31) di collegamento estendentesi lateralmente da detto corpo centrale (30) lungo un primo piano, ed inseribile all'interno del primo elemento tubolare (12); - a first connecting profile (31) extending laterally from said central body (30) along a first plane, and insertable inside the first tubular element (12);

- un secondo profilo (32) di collegamento estendentesi lateralmente da detto corpo centrale (30) in modo speculare a detto primo profilo (31) lungo detto primo piano, ed inseribile all'interno del secondo elemento tubolare (12); ed - a second connection profile (32) extending laterally from said central body (30) in a specular way to said first profile (31) along said first plane, and insertable inside the second tubular element (12); and

- un terzo profilo (33) di collegamento estendentesi da detto corpo centrale (30) lungo un secondo piano, sostanzialmente ortogonale al primo piano, ed avente un primo corpo (35) fissato a detto corpo centrale (30) e provvisto di almeno una prima superficie di aggancio (36) atta a cooperare, in uso, con un relativa superficie interna del terzo elemento tubolare (14), e di una prima superficie di guida (37) inclinata rispetto a detta prima superficie di aggancio (36), ed un secondo corpo (42), indipendente da detto primo corpo (35), disposto scorrevole rispetto a quest'ultimo e provvisto di una relativa seconda superficie di aggancio (43) opposta a detta prima superficie di aggancio (36) ed atta a cooperare, in uso, con una relativa superficie interna del secondo elemento tubolare, e di una seconda superficie di guida (45) disposta in scorrimento su detta prima superficie di guida (37) ed avente un'inclinazione coordinata a quest'ultima. - a third connection profile (33) extending from said central body (30) along a second plane, substantially orthogonal to the first plane, and having a first body (35) fixed to said central body (30) and provided with at least a first hooking surface (36) able to cooperate, in use, with a relative internal surface of the third tubular element (14), and with a first guide surface (37) inclined with respect to said first hooking surface (36), and a second body (42), independent of said first body (35), arranged to slide with respect to the latter and provided with a relative second hooking surface (43) opposite to said first hooking surface (36) and able to cooperate, in use, with a relative inner surface of the second tubular element, and of a second guide surface (45) arranged for sliding on said first guide surface (37) and having an inclination coordinated with the latter.

Questa soluzione nota presenta molteplici inconvenienti, tra i quali si annovera principalmente il fatto che risulta composta da un primo profilo ed un secondo profilo (31,32), rigidi e disposti a L e solidali quindi tra loro in una disposizione angolare, fissa rispetto ad un corpo centrale (30) da cui sporge inferiormente un primo corpo (35), al primo e secondo profilo (31,32) ed al primo corpo (35) essendo associabili i tre elementi tubolari (12,14), la vite 49 serrando meramente il terzo profilo (33) all'interno del terzo elemento tubolare (14). This known solution has many drawbacks, among which the main one is the fact that it is composed of a first profile and a second profile (31,32), rigid and arranged in an L shape and therefore integral with each other in an angular arrangement, fixed with respect to a central body (30) from which a first body (35) projects below, the first and second profile (31, 32) and the first body (35) being associated with the three tubular elements (12, 14), the screw 49 by tightening merely the third profile (33) inside the third tubular element (14).

Inoltre il corretto posizionamento dei vari componenti richiede che all'interno dei fori passanti 22 e dei fori filettati 23 vengano operativamente posizionate relative viti senza testa 25, o grani, di fissaggio reciproco fra le parti. Furthermore, the correct positioning of the various components requires that relative headless screws 25, or grub screws, for reciprocal fastening between the parts, be operatively positioned inside the through holes 22 and the threaded holes 23.

Compito principale di quanto forma oggetto della presente domanda ? quindi quello di risolvere i problemi tecnici evidenziati, eliminando gli inconvenienti di cui alla tecnica nota citata e quindi escogitando un giunto che permetta di congiungere, in modo rapido e agevole, tre profili disposti tra loro, in opera, a T. Main task of what is the subject of this application? then that of solving the technical problems highlighted, eliminating the drawbacks of the cited known art and therefore devising a joint which allows to join, quickly and easily, three profiles arranged together, on site, in a T shape.

Nell?ambito del compito sopra esposto, un altro importante scopo del trovato ? quello di realizzare un giunto che alle caratteristiche precedenti accomuni quella di permettere di conseguire un solido e duraturo collegamento tra i tre profili disposti a T. Within the scope of the above aim, another important object of the invention is that of creating a joint which associates the previous characteristics with that of allowing to achieve a solid and lasting connection between the three profiles arranged in a T.

Ancora uno scopo ? quello di realizzare un trovato che permetta all?utilizzatore di associarlo in modo semplice ai tre profili pervenendo al reciproco fissaggio in tempi rapidi e senza l?ausilio di particolari utensili. Still a purpose? that of realizing an invention which allows the user to associate it in a simple way to the three profiles achieving mutual fastening quickly and without the aid of particular tools.

Un altro scopo ? quello di ottenere un trovato che permetta di conseguire il suo utilizzo anche senza particolare manualit? da parte dell?utilizzatore. Another purpose? to obtain an invention that allows to achieve its use even without particular manual skills? by the user.

Ancora uno scopo ? quello di realizzare un giunto che sia allo stesso tempo facilmente e agevolmente rimovibile. Still a purpose? that of creating a joint that is both easily and easily removable.

Non ultimo scopo ? quello di ottenere un trovato che alle caratteristiche precedenti accomuni anche quelle di risultare strutturalmente semplice, che presenti costi di realizzazione contenuti e che sia realizzabile con gli usuali noti impianti. Not the ultimate goal? that of obtaining an invention which also associates with the preceding characteristics those of being structurally simple, which has low manufacturing costs and which can be manufactured with the usual known plants.

Il compito e gli scopi accennati, nonch? altri che pi? chiaramente appariranno in seguito, vengono raggiunti da un giunto (1) di collegamento per profili tubolari (2,3,4), che si caratterizza per il fatto di comprendere un guscio (5), divaricabile e conformato a T a definire una prima testa (6) dotata di due prime ali (7a,7b) e di un primo gambo (8), di contenimento per un controsagomato inserto (9) presentante una seconda testa (15) dotata di due seconde ali (16a,16b) e di un secondo gambo (17), in corrispondenza di detto inserto (9) essendo ricavata una quarta sede (18), assiale a detto secondo gambo (17), per una vite (19) atta a forzare la espansione radiale di detto primo gambo (8) e di dette prime ali (7a,7b), detti profili tubolari (2,3,4) essendo associabili esternamente a dette prime ali (7a,7b) e primo gambo (8) di detto guscio (5). The task and the purposes mentioned, as well as? others that more they will clearly appear later, are joined by a connection joint (1) for tubular profiles (2,3,4), which is characterized by the fact that it comprises a shell (5), which can be spread apart and shaped like a T to define a first head (6) equipped with two first wings (7a,7b) and with a first shank (8), containing a counter-shaped insert (9) having a second head (15) equipped with two second wings (16a,16b) and with a second stem (17), in correspondence with said insert (9) a fourth seat (18) being obtained, axial to said second stem (17), for a screw (19) able to force the radial expansion of said first stem ( 8) and of said first wings (7a,7b), said tubular profiles (2,3,4) being externally associated with said first wings (7a,7b) and first stem (8) of said shell (5).

Ulteriori caratteristiche e vantaggi del trovato risulteranno maggiormente dalla descrizione dettagliata di una particolare, ma non esclusiva, forma di realizzazione, illustrata a titolo indicativo e non limitativo nelle tavole di disegni allegate, in cui: Further characteristics and advantages of the invention will become clearer from the detailed description of a particular, but not exclusive, embodiment, illustrated for indicative and non-limiting purposes in the attached tables of drawings, in which:

la fig. 1 illustra il giunto assemblato in una vista di tre quarti laterale; the fig. 1 illustrates the assembled joint in a side three-quarter view;

la fig. 2 illustra il giunto in una vista dall?alto; the fig. 2 illustrates the joint in a top view;

la fig. 3 ? una vista operata secondo il piano di sezione III-II di fig. 2 nella condizione di attivazione parziale; the fig. 3 ? a view taken according to the section plane III-II of fig. 2 in the condition of partial activation;

la fig. 4 ? una vista analoga alla precedente nella condizione di attivazione finale; the fig. 4 ? a view similar to the previous one in the final activation condition;

la fig. 5 illustra in un esploso il giunto e i profili tubolari; the fig. 5 is an exploded view of the joint and the tubular profiles;

la fig. 6 illustra il giunto in una visata di tre quarti laterale; the fig. 6 shows the joint in a lateral three-quarter view;

la fig. 7 illustra il giunto parzialmente aperto; the fig. 7 illustrates the joint partially open;

la fig. 8 illustra il giunto in un esploso; la fig. 9 illustra il giunto assemblato con i profili tubolari parzialmente sezionati. the fig. 8 illustrates the joint in an exploded view; the fig. 9 shows the joint assembled with the tubular profiles partially sectioned.

Negli esempi di realizzazione che seguono, singole caratteristiche, riportate in relazione a specifici esempi, potranno in realt? essere intercambiate con altre diverse caratteristiche, esistenti in altri esempi di realizzazione. In the embodiment examples that follow, individual characteristics, reported in relation to specific examples, will actually be able to be interchanged with other different features, existing in other embodiments.

Inoltre ? da notare che tutto quello che nel corso della procedura di ottenimento del brevetto si rivelasse essere gi? noto, si intende non essere rivendicato ed oggetto di stralcio (disclaimer) dalle rivendicazioni. Furthermore ? to note that all that in the course of the procedure of obtaining the patent turned out to be already? known, is intended not to be claimed and subject to disclaimer from the claims.

Con riferimento alle figure precedentemente citate si ? indicato con il numero 1 un giunto di collegamento predisposto per permettere l'unione fra loro di tre profili tubolari, indicati con i numeri 2,3 e 4, che in opera si dispongono a T risultando i profili 2 e 3 in orizzontale ed il profilo 4 in verticale. With reference to the previously cited figures yes ? indicated with the number 1 a connection joint arranged to allow the union between them of three tubular profiles, indicated with the numbers 2,3 and 4, which are arranged in a T shape on site resulting in the profiles 2 and 3 horizontally and the profile 4 vertically.

Tali tre profili tubolari 2,3,4 costituiscono parte di un telaio di supporto per strutture componibili, non illustrate, quali, ad esempio, un mobile, un tavolo, uno scaffale, una scrivania, una seduta. These three tubular profiles 2,3,4 form part of a support frame for modular structures, not shown, such as, for example, a piece of furniture, a table, a shelf, a desk, a seat.

Il giunto 1 di collegamento ? costituito da un guscio 5 divaricabile conformato a T, a definire una prima testa 6, esternamente di forma cilindrica, dotata di due prime ali 7a,7b e di un primo gambo 8, esternamente di forma cilindrica, di contenimento per un controsagomato inserto 9. The connecting joint 1 ? consisting of a T-shaped spreadable shell 5, to define a first head 6, externally cylindrical in shape, equipped with two first wings 7a, 7b and a first stem 8, externally cylindrical in shape, for containing a counter-shaped insert 9.

Il guscio 5 ? divaricabile in quanto ? a sua volta composto da un primo semiguscio 10a conformato a T e da un secondo semiguscio 10b conformato a T, speculari tra loro rispetto ad un asse diametrale a detto guscio 5 cos? da poter essere tra loro sovrapposti a contenere detto inserto 9. Shell 5? divaricabile in how much ? in turn composed of a first T-shaped half-shell 10a and a second T-shaped half-shell 10b, specular to each other with respect to a diametrical axis of said shell 5 so? so that they can be superimposed on each other to contain said insert 9.

Detti primo e secondo semiguscio 10a,10b possono essere inizialmente interconnessi provvisoriamente mediante micro-giunture separabili alla attivazione di detto giunto 1. Said first and second half-shells 10a, 10b can initially be provisionally interconnected by means of micro-joints which can be separated upon activation of said joint 1.

Ciascuno di detti primo e secondo semiguscio 10a,10b presentano internamente, in corrispondenza di dette prime ali 7a,7b, prime sedi 11a,11b,11c,11d di forma sostanzialmente troncoconica con vertice rivolto verso le estremit? terminali che risultano cos? rastremate. Each of said first and second half-shells 10a, 10b has internally, in correspondence with said first wings 7a, 7b, first seats 11a, 11b, 11c, 11d having a substantially truncated conical shape with the apex facing the ends? terminals that are cos? tapered.

Ciascuno di detti primo e secondo semiguscio 10a,10b presentano internamente, in corrispondenza di detto primo gambo 8, seconde sedi 12a,12b di forma sostanzialmente troncoconica con vertice rivolto verso detta prima testa 6. Each of said first and second half-shells 10a, 10b have internally, in correspondence with said first shank 8, second seats 12a, 12b of substantially frusto-conical shape with apex facing said first head 6.

Ciascuno di detti primo e secondo semiguscio 10a,10b presenta inoltre, in corrispondenza delle superfici laterali di dette prime sedi 11a,11b,11c,11d e di dette seconde sedi 12a,12b, predisposte fessurazioni 13a,13b,13c,13d,13e,13f assiali e, in corrispondenza di dei bordi laterali sempre di dette prime sedi 11a,11b,11c,11d e di dette seconde sedi 12a,12b, predisposti scansi piani 26a,26b,26c,26d,26e,26f, 26g,26h, 26i,26j, 26k,26l tutti atti a consentire la divaricazione, in opera, di dette prime ali 7a,7b e di detto primo gambo 8. Each of said first and second half-shells 10a, 10b also has, in correspondence with the lateral surfaces of said first seats 11a, 11b, 11c, 11d and of said second seats 12a, 12b, slots 13a, 13b, 13c, 13d, 13e, 13f axial and, in correspondence with the side edges always of said first seats 11a,11b,11c,11d and of said second seats 12a,12b, arranged flat recesses 26a,26b,26c,26d,26e,26f, 26g,26h, 26i, 26j, 26k, 26l all adapted to allow the spreading, on site, of said first wings 7a, 7b and of said first stem 8.

In corrispondenza di detta prima testa 6 ? ricavata, internamente a ciascuno di detti primo e secondo semiguscio 10a,10b, una terza sede 14a,14b in asse con le seconde sedi 12a,12b. In correspondence with said first head 6 ? inside each of said first and second half-shells 10a, 10b, a third seat 14a, 14b is formed in line with the second seats 12a, 12b.

L?inserto 9, conformato anche esso a T, presenta una seconda testa 15, controsagomata a detta terza sede 14a,14b di detta prima testa 6, dotata di seconde ali 16a,16b, di forma sostanzialmente troncoconica con vertici rastremati rivolti verso le estremit? libere e controsagomate a dette prime sedi 11a,11b,11c,11d, e di un secondo gambo 17, di forma sostanzialmente troncoconica e controsagomato a dette seconde sedi 12a,12b. The insert 9, also T-shaped, has a second head 15, counter-shaped to said third seat 14a, 14b of said first head 6, equipped with second wings 16a, 16b, substantially frusto-conical in shape with tapered vertices facing the ends ? free and counter-shaped to said first seats 11a, 11b, 11c, 11d, and of a second stem 17, having a substantially frusto-conical shape and counter-shaped to said second seats 12a, 12b.

Il secondo gambo 17 dell?inserto 9 presenta una quarta sede 18 assiale per una vite 19 presentante una terza testa 20 girevolmente associata entro le terze sedi 14a,14b, assiali e passanti, ricavate su detta prima testa 6 ed in asse con detta quarta sede 18. The second shank 17 of the insert 9 has a fourth axial seat 18 for a screw 19 having a third head 20 rotatably associated within the third seats 14a, 14b, axial and through, formed on said first head 6 and aligned with said fourth seat 18.

La vite 19 presenta un terzo gambo 22, filettato alla estremit? interagente con un dado 23 bloccato in rotazione entro un predisposto alloggiamento 24 ricavato alla base di detto secondo gambo 17, detto alloggiamento comunicando ed essendo in asse con predisposti primi fori o aperture 25a,25b ricavate alle estremit? terminali di detti primo e secondo semiguscio 10a,10b in corrispondenza di dette seconde sedi 12a,12b. The screw 19 has a third shank 22, threaded at the end interacting with a nut 23 locked in rotation within a suitable housing 24 obtained at the base of said second stem 17, said housing communicating and being aligned with suitable first holes or openings 25a, 25b obtained at the ends? terminals of said first and second half-shells 10a, 10b in correspondence with said second seats 12a, 12b.

Quando viene avvitata, la vite 19 fa s? che il dado 23 sospinga verso l?alto il secondo gambo 17 dell?inserto 9 che, essendo conformato a tronco di cono, forza la dilatazione radiale del primo e del secondo semiguscio 10a,10b. When screwed in, screw 19 does s? that the nut 23 pushes the second leg 17 of the insert 9 upwards which, being shaped like a truncated cone, forces the radial expansion of the first and second half-shells 10a, 10b.

Contemporaneamente viene spinta verso l?alto anche la seconda testa 15 che presenta, lateralmente alle seconde ali 16a,16b, due primi piani inclinati 27a,27b sporgenti perpendicolarmente a detto secondo gambo 17 ed interagenti con secondi piani inclinati 28a,28b ricavati alla base di due cunei 29a,29b controsagomati ed alloggiabili entro dette prime sedi 11a,11b,11c,11d. At the same time, the second head 15 is also pushed upwards, which has, laterally to the second wings 16a, 16b, two first inclined planes 27a, 27b projecting perpendicularly to said second stem 17 and interacting with second inclined planes 28a, 28b formed at the base of two counter-shaped wedges 29a, 29b which can be housed in said first seats 11a, 11b, 11c, 11d.

Come illustrato nelle figure 3 e 4, il sollevamento del secondo gambo 17 comporta allo stesso tempo la divaricazione del primo gambo 8 del guscio 5 e la divaricazione delle prime ali 7a,7b del guscio 5. As illustrated in figures 3 and 4, the lifting of the second stem 17 involves at the same time the spreading of the first stem 8 of the shell 5 and the spreading of the first wings 7a, 7b of the shell 5.

Preventivamente alla attivazione della vite 19 si devono inserire, esternamente alle prime ali 7a,7b ed al primo gambo 8, i profili tubolari 2,3,4: alla attivazione della vite 19 si consegue cos? il serraggio del guscio 5 ai profili tubolari 2,3,4 per interferenza delle superfici laterali interne degli stessi con le prime ali 7a,7b ed il primo gambo 8, dilatati. Before activating the screw 19, the tubular profiles 2,3,4 must be inserted externally to the first wings 7a, 7b and the first stem 8: the tightening of the shell 5 to the tubular profiles 2,3,4 by interference of the internal lateral surfaces of the same with the first wings 7a,7b and the first stem 8, dilated.

Sono presenti mezzi di centraggio della posizione relativa tra detti guscio 5 ed inserto 9 i quali sono costituiti da una coppia di perni 30a,30b sporgenti assialmente alla seconda testa 15 ed atti ad alloggiare, nella condizione di serraggio di detto guscio 5 a detti profili tubolari 2,3,4, in corrispondenza di secondi fori 31a,31b, ricavati in prossimit? delle estremit? attigue dei profili 2 e 3, e terzi fori 32a,32b . There are means for centering the relative position between said shell 5 and insert 9 which consist of a pair of pins 30a, 30b protruding axially from the second head 15 and adapted to house, in the tightened condition of said shell 5, said tubular profiles 2,3,4, in correspondence with second holes 31a,31b, obtained in proximity? of the extremities? contiguous profiles 2 and 3, and third holes 32a, 32b.

In corrispondenza delle estremit? attigue dei profili 2 e 3 ? inoltre ricavata uno scanso semicircolare 33a,33b, attiguo detti secondi fori 31a,31b e definente una accesso per la terza testa 20 della vite 19. At the ends? contiguous of profiles 2 and 3 ? furthermore, a semicircular recess 33a, 33b is obtained, adjacent to said second holes 31a, 31b and defining an access for the third head 20 of the screw 19.

Le teste dei profili 2,3,4 sono opportunamente svasate per potersi accostare tra loro una volta inseriti nel guscio 5. The heads of the profiles 2,3,4 are suitably flared to be able to approach each other once inserted in the shell 5.

Si ? cos? constatato come il trovato abbia raggiunto il compito e gli scopi prefissati essendosi ottenuto un giunto che permette ad un utilizzatore di congiungere, in modo rapido e agevole, tre profili o elementi tubolari costituenti il telaio di supporto per strutture componibili, quali, ad esempio, un mobile, un tavolo, uno scaffale, una scrivania, una seduta. Yes ? what? having observed that the invention has achieved the intended aim and objects, a joint having been obtained which allows a user to join, quickly and easily, three profiles or tubular elements constituting the support frame for modular structures, such as, for example, a piece of furniture, a table, a shelf, a desk, a seat.

Inoltre il giunto permette di conseguire un solido e duraturo collegamento tra i tre profili disposti a T; l?utilizzatore riesce a collegare il giunto in modo semplice ai tre profili e riesce a conseguire il reciproco fissaggio in tempi rapidi e senza l?ausilio di particolari utensili. Furthermore, the joint allows to achieve a solid and lasting connection between the three profiles arranged in a T; the user is able to connect the joint in a simple way to the three profiles and is able to achieve reciprocal fastening quickly and without the aid of particular tools.

Il giunto risulta inoltre facilmente e agevolmente rimovibile. The joint is also easily and easily removable.

Infine la connessione tra i profili costituenti il telaio di supporto per strutture componibili non richiede alcuna saldatura. Finally, the connection between the profiles constituting the support frame for modular structures does not require any welding.

Infine il giunto risulta composto da un numero contenuto di componenti cos? da risultare strutturalmente semplice e realizzabile con costi di realizzazione contenuti. Finally, the joint is composed of a limited number of components so? to be structurally simple and feasible with low construction costs.

Naturalmente i materiali impiegati nonch? le dimensioni costituenti i singoli componenti del trovato potranno essere pi? pertinenti a seconda delle specifiche esigenze. Of course the materials used as well as? the dimensions constituting the single components of the invention could be more? relevant to specific needs.

Le caratteristiche indicate come vantaggiose, opportune o simili, possono anche mancare od essere sostituite da equivalenti. The characteristics indicated as advantageous, suitable or similar may also be missing or replaced by equivalents.

Claims

1. Connection joint (1) for tubular profiles (2,3,4), which is characterized by the fact that it comprises a shell (5), which can be spread apart and T-shaped to define a first head (6) equipped with two first wings (7a, 7b) and a first shank (8), containing a counter-shaped insert (9) having a second head (15) equipped with two second wings (16a, 16b) and a second shank (17), in correspondence with said insert (9) a fourth seat (18) being obtained, axial to said second stem (17), for a screw (19) suitable for forcing the radial expansion of said first stem (8) and of said first wings (7a,7b), said tubular profiles (2,3,4) being externally associated with said first wings (7a,7b) and first stem (8) of said shell (5).

2. Connection joint (1) as claimed in claim 1 which is characterized in that said shell (5), which can be spread apart and T-shaped, has a first head (6), externally cylindrical in shape, equipped with two first wings ( 7a, 7b) and a first stem (8), externally cylindrical in shape, for containing said, counter-shaped, insert (9), externally to said shell (5) being insertable, externally to said first wings (7a, 7b) and to said first stem (8), said tubular profiles (2,3,4) having heads suitably flared to be able to approach each other once inserted in said shell (5).

3. Connection joint (1) as to one or more? of the preceding claims which is characterized by the fact that it can be spread apart as ? composed of a first T-shaped half-shell (10a) and a second T-shaped half-shell (10b), specular to each other with respect to a diametrical axis of said shell (5) so? so that they can be superimposed on each other to contain said insert (9).

4. Connection joint (1) as to one or more? of the preceding claims which is characterized in that each of said first and second half-shells (10a, 10b) has internally, in correspondence with said first wings (7a, 7b), first seats (11a, 11b, 11c, 11d) substantially truncated cone with vertex facing the extremities? terminals that are cos? tapered, each of said first and second half-shells (10a, 10b) presenting internally, in correspondence with said first shank (8), second seats (12a, 12b) of substantially frustoconical shape with apex facing said first head (6).

5. Connection joint (1) as to one or more? of the preceding claims which is characterized in that each of said first and second half-shells (10a, 10b) has, in correspondence with the lateral surfaces of said first seats (11a, 11b, 11c, 11d) and of said second seats (12a, 12b), predisposed slots (13a,13b,13c,13d,13e,13f) and, in correspondence with the side edges always of said first seats (11a,11b,11c,11d) and of said second seats (12a,12b ), prepared flat areas (26a,26b,26c,26d,26e,26f,26g,26h, 26i,26j,26k,26l) all suitable to allow the divarication, on site, of said first wings (7a,7b) and of said first leg (8).

6. Connection joint (1) as to one or more? of the preceding claims which is characterized by the fact that in correspondence with said first head (6) ? formed, inside each of said first and second half-shells (10a, 10b), a third seat (14a, 14b) in line with said second seats (12a, 12b).

7. Connection joint (1) as to one or more? of the preceding claims which is characterized in that said T-shaped insert (9) has a second head (15), counter-shaped to said third seat (14a, 14b) of said first head (6), equipped with second wings (16a,16b), substantially truncated conical in shape with tapered vertices facing the ends? free and counter-shaped to said first seats (11a, 11b, 11c, 11d), and of a second stem (17), substantially truncated-conical in shape and counter-shaped to said second seats (12a, 12b), said second stem (17) of said insert (9) having a fourth axial seat (18) for a screw (19) having a third head (20) rotatably associated within said third seats (14a, 14b), axial and through, obtained on said first head (6) and aligned with said fourth seat (18), said screw (19) having a third shank (22), threaded at the end? interacting with a nut (23) locked in rotation within a prearranged housing (24) obtained at the base of said second stem (17), said housing communicating and being aligned with prearranged first holes or openings (25a, 25b) obtained at the ends? ends of said first and second half-shells (10a, 10b) in correspondence with said second seats 12a, 12b.

8. Connection joint (1) as to one or more? of the preceding claims which is characterized in that the rotation of said screw (19) drags, by means of said nut (23), said second shank (17) of said insert (9) upwards which, being shaped like a log cone, forces the radial expansion of said first and second half-shells (10a, 10b), simultaneously also being pushed upwards said second head (15) which has, laterally to said second wings (16a, 16b), two first inclined planes (27a, 27b) protruding perpendicularly to said second stem (17) and interacting with second inclined planes (28a, 28b) formed at the base of two counter-shaped wedges (29a, 29b) which can be housed inside said first seats (11a, 11b, 11c, 11d), the lifting of said second leg (17) forcing the spreading of said first leg (8) of said joint (6) and the spreading of said first wings (7a,7b) of said shell (5).

9. Connection joint (1) as to one or more? of the preceding claims which is characterized in that it has means for centering the relative position between said shell (5) and insert (9) which consist of a pair of pins (30a, 30b) protruding axially from said second head (15 ) and adapted to house, in the condition of tightening of said shell (5) to said tubular profiles (2,3,4), in correspondence with second holes (31a,31b), obtained near the of the extremities? contiguous of said profiles (2,3) and of third holes (32a,32b), in correspondence of the extremities? adjacent to said profiles (2,3) a semicircular recess (33a,33b) being formed, adjacent to said second holes (31a,31b) and defining an access for said third head (20) of said screw (19).

10. Connection joint (1) as to one or more? of the preceding claims which is characterized in that said first and second half-shells (10a, 10b) are initially provisionally interconnected by means of micro-joints which can be separated upon activation of said joint (1) itself.

The Agent Dr. Ing. Bruno Cavasin