ES2558206B1 - SUPPORT FOR TOLDING ARM WITH INCLINATION REGULATION DEVICE - Google Patents

Abstract

Support for awning arm with inclination adjustment device. # The invention relates to a support (1) for awning arm with inclination adjustment device, comprising: a fixed part (2) defining a rotation axis ( AND); a pivoting part (3) facing the fixed part (2) and coaxial to the axis (E); an intermediate piece (4) rigidly coupled to the pivoting part (3) and with the possibility of turning to the fixed part (2); angular adjustment means; and a locking mechanism; characterized in that the intermediate part (4) comprises a body (5) of polygonal cross section with a plurality of lateral faces (6), coaxially arranged to the axis (E) with its cross section parallel to a face (7) of the pivoting part (3); and the pivoting part (3) comprises on said face (7) a cavity (8) coaxial to the axis (E) with lateral walls (9) adapted to fit on the lateral faces (6) of the body (5).

Description

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DESCRIPTION

SUPPORT FOR TOLDING ARM WITH REGULATION DEVICE

INCLINATION

The present invention relates to a support for awning arm with inclination adjustment device capable of adjusting the inclination of the awning canvas to a desired angular position. In particular, the awning arm support of the present invention makes it possible to vary the inclination of the arm in a simple and precise manner, reducing the tension on the support, which allows larger awning dimensions and avoids possible loss of regulation due to wind blows.

Background of the invention

A canopy typically comprises a winding drum of a tarp, a loading bar to which the leading edge of the tarp is attached, and two supports capable of being fixed to a wall, ceiling or between walls, arranged on both sides of the awning, to which the ends of articulated arms linked to the load bar are linked to deploy or collect the canvas.

In general, it is necessary to adjust the inclination of the canvas with respect to the horizontal so that the canvas adopts a desired angular position when the awning is deployed. For this purpose, the awning arm supports usually include a mechanism to regulate the inclination of the arms.

Awnings arm supports with a tilt adjustment device comprising a fixed part defining a rotation axis are known in the state of the art, the fixed part being able to be fixed to a wall or ceiling so that said axis of rotation is parallel to the winding axis of the awning canvas, and a pivoting piece facing the fixed part and coaxial to the rotation axis, the pivoting piece being able to support an awning arm.

In these supports, as shown for example in publications ES1037252U and ES1050802U, the fixed part includes a grooved cavity in which the regulating device is housed, which comprises a spindle arranged longitudinally in said cavity and a

pin arranged transversely to the spindle, protruding from the fixed part, and coupled to

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this one end through a threaded through hole, which allows the spike to move by means of thread along the spindle. In addition, the pivoting part comprises another cavity, away from the axis of rotation, configured to receive and engage with the end of the pin protruding from the fixed part. Due to this coupling, a longitudinal displacement of the pin, when acting on the spindle, produces a rotation of the pivoting piece, varying the inclination of the awning arm.

The solutions of this type have as main drawback that the transmission of the load of the pivoting piece, with the awning arm connected to it, to the inclination adjustment device is very poor. When the pivoting part is connected to said regulation device only at the point of attachment between the pin and the cavity of the pivoting piece, the tensions of the structure on the pin are concentrated, which can cause its deformation or breakage.

An attempt to solve this problem consists in adding to the support an intermediate part arranged between the fixed part and the pivoting part. Said intermediate piece is crimped with the pivoting part and is coupled with the possibility of rotation to the fixed piece, so that the intermediate piece and the pivoting piece can rotate jointly with respect to the fixed piece around said axis of rotation. The intermediate piece has the form of a circular sector comprising a plurality of cylindrical projections, arranged in the vicinity of the arc of the circular sector, which are coupled to cavities provided in the pivoting part.

In this case, the support also includes angular adjustment means to place the intermediate piece in a desired angular position with respect to the fixed part, thereby determining the degree of inclination of the awning arm, and an operable locking mechanism to approximate and secure the pivoting piece to the fixed piece and thereby gagging the intermediate piece between them.

However, this solution also does not solve the problems described, since the coupling between the pivoting piece and the intermediate piece, on which the angular adjustment means act, continues to occur in a few discrete points, which are subject to high stresses.

It would therefore be desirable to have an awning arm support with a device for

inclination regulation where the transmission of the load of the pivoting piece to the

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Tilt adjustment device is more efficient, so that its inclination can be varied simply and accurately.

Description of the invention

With the awning arm support with tilt adjustment device according to claim 1, the aforementioned drawbacks are resolved, also presenting other advantages that will be described.

One aspect of the present invention relates to a support for awning arm with inclination adjustment device, comprising: a fixed part defining a rotation axis, the fixed part being able to be fixed to a bearing element so that said axis of rotation is parallel to the axis of winding of a canvas of the awning; a pivoting piece facing the fixed and coaxial piece to the rotation axis, the pivoting piece being capable of supporting an awning arm; an intermediate piece disposed between the fixed part and the pivoting part, said intermediate part being rigidly coupled to the pivoting part and coupled with the possibility of rotation to the fixed part, so that the intermediate piece and the pivoting part can rotate in relation to the fixed piece around said axis of rotation; angular adjustment means for placing the intermediate piece in a desired angular position with respect to the fixed part, thereby determining the degree of inclination of the awning arm; and an operable locking mechanism to approximate and secure the pivoting piece to the fixed piece and thereby gag the intermediate piece between them. Said awning arm support is characterized in that the intermediate part comprises a polygonal cross-sectional body with a plurality of lateral faces, said body being coaxially disposed to said rotation axis with its cross-section parallel to a face of the pivoting part; and because the pivoting part comprises in said face a cavity coaxial to the axis of rotation with lateral walls adapted to fit on the lateral faces of the body of the intermediate piece.

In accordance with the present invention, the body of the intermediate piece has a cross section (that is, according to a plane perpendicular to the axis of rotation) polygonal, with as many lateral faces as edges it has said cross section and which are arranged around the axis of rotation but without intersecting it. Thus, the body of the intermediate piece has a prismatoidal shape, preferably of a prismatic or truncated pyramidal type.

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On the other hand, the side walls of the cavity of the pivot piece define a surface complementary to the surface defined by the side faces of the body of the intermediate piece, so that a cross-section of the cavity (according to a plane perpendicular to the axis of rotation) also defines a polygonal contour with the same number of edges as in the cross section of the body of the intermediate piece. Consequently, the side walls of the cavity are also arranged around the axis of rotation but without intersecting it.

Therefore, in the awning arm support of the present invention, the coupling between the pivot piece and the intermediate piece is advantageously performed by crimping each of the side walls of the pivot piece cavity on a side face corresponding to the body of the intermediate piece. Thus, the transmission of the load of the pivoting piece (and of the awning arm connected to it) to the intermediate piece is distributed evenly over a perimeter band of contact between the side faces of the body of the intermediate piece and the side walls of the pivot piece cavity. In this way, the stresses that the intermediate piece supports are considerably attenuated, thereby reducing the possibility of breaking this piece.

In addition, unlike what happens in the solutions of the state of the art, since the coupling is between the intermediate piece and the pivoting piece distributed over a whole perimeter band of contact, the moment (or torque) of the force exerted by the Angular adjustment means on the intermediate piece is transferred more efficiently to the pivoting piece, therefore requiring a smaller force to rotate the awning arm.

Consequently, since the structure of the support is subjected to lower mechanical stresses, the awning arm support of the present invention allows to vary the inclination of the awning simply and precisely.

In some embodiments, especially when the awning is mounted on a wall, ceiling, or between walls, the supporting element to which the fixed part of the support can be fixed is a wall or ceiling. On the other hand, in other embodiments, especially when the awning is of the monobloc or chest type, the supporting element to which said fixed part can be fixed is advantageously a metal bar, preferably of square or rectangular cross-section, which in turn can be fixed to a wall, ceiling, or beam, or that can even be self-supporting.

In the context of the present invention, an element (such as a piece, a body or a

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cavity) coaxially arranged to the axis of rotation preferably refers to said element being centered on said axis and which can rotate around it. In this sense, the term does not presuppose that the element is cylindrical or has a symmetry of revolution.

In some embodiments, the cross section of said body has a regular polygonal shape. Advantageously, the center of said regular polygonal shape is in the axis of rotation. Having the shape of a regular polygon, the cross-section of the body of the intermediate piece has several symmetry axes (in particular as many as the edges have said cross-section). Consequently, by applying a rotation to the pivoting part with respect to the intermediate piece corresponding to the angle between two of said symmetry shafts, the lateral faces of the body of the intermediate piece maintain their correspondence with the side walls of the cavity of the pivoting piece. .

In this way, the adjustment range of the inclination of the awning arm can be advantageously extended since, when the angular adjustment means reach the end of its travel, the relative angular position of the pivoting piece can be changed manually relative to the intermediate piece That is, the entire range of regulation can be broken down into several ranges of angular adjustment (coarse adjustment of the inclination), each determined by a relative angular position of the pivoting piece relative to the intermediate piece. Within each angular range, the angular adjustment means allow a fine adjustment of the awning of the awning arm.

Preferably, in these embodiments, said regular polygonal shape is a regular octagon. Ace! the symmetry axes of the cross section are arranged every 45 ° (360 ° divided by 8), so that it is possible to select between a first and a second angular adjustment ranges in which the angular adjustment means perform, respectively, the fine adjustment between 0 ° -45 ° and 45 ° -90 °.

However, in other cases the regular polygonal shape may be an equilateral triangle, a square, a regular pentagon, a regular hexagon or a regular heptagono. In fact, regular polygonal cross sections with between three and eight sides are particularly advantageous since they provide a better transmission of the momentum of the force exerted by the angular adjustment means.

In certain embodiments, the body of the intermediate piece has a trunk-pyramidal shape,

its cross section being smaller at a first end of said body close to the

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pivoting and larger piece at a second end of said body next to the fixed part.

Thus, when the locking mechanism muzzles the intermediate piece between the pivot piece and the fixed piece, all the clearance that may exist in the fit between the pivot piece and the intermediate piece is eliminated due, for example, to the tolerances of fabrication

In the state-of-the-art supports, despite the fact that the pivoting part is secured to the fixed part, the residual clearance of the pivoting part with the intermediate piece (or with the means of angular adjustment) causes the pivoting part to vary slightly its angular position with respect to the desired position, for example as a result of wind blows against the awning. These differences in inclination translate into differences in height at the end of the awning arms linked to the load bar.

In accordance with the present invention, this problem is solved by providing the body of the intermediate piece with a trunk-pyramidal shape. Since the side walls of the cavity of the pivot piece are adapted to fit on the side faces of the body of the intermediate piece, in these embodiments the cavity of the pivot piece also has a trunk-pyramidal shape. Therefore, the adjustment between the body of the intermediate piece and the cavity of the pivoting piece is, to some extent, similar to that achieved with a morse cone.

Preferably, at least 60, 65, 70, 75, 80, 85, 90 or 95% of the surface of said face of the pivoting piece is inside the perimeter defined by the side walls of said cavity.

The greater the distance from the axis of rotation at which the adjustment of the side walls of the cavity of the pivoting piece takes place with the corresponding lateral faces of the body of the intermediate piece, the greater the lever arm on the pivoting piece. to rotate the awning arm, thereby reducing the force necessary to achieve the same torque. Ace! therefore, the larger the cross section of the body of the intermediate piece, the further away from the axis of rotation will be the side walls of the cavity of the pivoting piece, and the greater the surface of the face of the pivoting piece that is inside will be of the polygonal perimeter that define the side walls of the cavity in said face of the pivoting piece. In this way, the size of the perimeter contact band between said side faces and said side walls is increased,

thereby reducing the tension on the intermediate piece.

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Also preferably, the locking mechanism comprises a screw adapted to be passed in the direction of the rotation axis through two through axial holes formed, respectively, in the fixed part and the intermediate part, and screwed in the pivoting part.

This allows to easily approximate the pivot piece to the fixed piece by efficiently gagging the intermediate piece between them. Said screw can be screwed into an axial threaded threaded hole formed in the pivot piece or, alternatively, in a nut retained in a housing of the pivot piece.

Optionally, the angular adjustment means comprise angular fixing elements for fixing the intermediate piece in the angular position selected by means of said angular adjustment means. In this way it is avoided that the angular position of the intermediate piece can deviate from the selected position due to mechanical tolerances, or due to wind blows on the awning.

In some embodiments, the body of the intermediate piece comprises, on a transverse face of said body facing the fixed piece, a first projection; the fixed part comprises an arc-shaped groove of concentric circumference to the axis of rotation, the groove being adapted to receive said first projection during the rotation of the intermediate part with respect to the fixed part; and the angular adjustment means are coupled to said first projection and to said groove.

This configuration allows a better transmission of the force from the angular adjustment means to the intermediate piece so that it rotates to the desired angular position.

Preferably in these embodiments, the angular adjustment means comprise a first stud passed through an orifice of the fixed part and screwed into a first nut housed at one end of the groove of said fixed part, said stud being mechanically coupled to the first projection. of the body of the intermediate piece. In this way, a linear displacement of the asparagus advantageously results in a rotation of the intermediate piece.

Also preferably it is these embodiments, the body of the intermediate piece

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it comprises, on said transverse face of the body, a second projection adapted to fit in the groove of the fixed part, and the first projection and the second projection are arranged in two positions that define a second arc of concentric circumference to the axis of rotation. This configuration greatly facilitates the integration of an angular position fixing element.

In some cases, the angular separation between said first projection and second projection is advantageously between 130 ° and 160 °. This range of angular separations allows the angular adjustment means a good margin of regulation of the awning of the awning and, at the same time, facilitates the fixation of the angular position. However, in other cases, said angular separation may be greater or lesser depending on the path of the angular adjustment means and / or the type of awning in which the support is used.

In certain cases, the first projection and / or the second projection of the intermediate piece are adapted to be guided in the groove of the gliding fixed part during the rotation of the intermediate part with respect to the fixed part.

Optionally, the angular adjustment means comprise a second stud passed through a second hole of the fixed part and screwed into a second nut housed in the end of the groove of said fixed part opposite the end in which the first nut is housed. said second stud being mechanically coupled to the second projection of the body of the intermediate piece, the second stud being able to immobilize the angular position of said intermediate piece for a direction of rotation of the intermediate piece with respect to the fixed piece and the first stud being capable of immobilizing the angular position of said intermediate piece for the opposite direction of rotation.

In certain embodiments, the intermediate piece is symmetrical with respect to a plane containing the axis of rotation. In this way, the same type of intermediate piece can be advantageously used interchangeably in the support of either side of the awning, preventing the awning assembly kit from requiring specific intermediate parts for the support of the right side and the left side. .

Optionally, the intermediate piece is integrally constituted of aluminum or zamak. These materials suppose a good commitment of mechanical resistance to withstand the tensions produced by the load of the pivoting part and the awning arm, and of

deformability to obtain a good fit of the polygonal cross-sectional body in

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the cavity of the pivoting piece.

Also optionally, the fixed part comprises a fixing member with three orthogonal faces defining a trihedron angle. This makes it possible that the fixed part of the support can be fixed simply to a front wall, a side wall, or a ceiling.

The present invention also relates to a canopy comprising: a winding drum of a canvas; a loading bar to which the leading edge of the canvas is attached; two supports capable of being fixed to a supporting element, arranged on both sides of the awning, to which the ends of articulated arms linked to the loading bar are linked to deploy or collect the canvas; wherein at least one of said two supports is a support for awning arm with inclination adjustment device according to the present invention.

Brief description of the figures

For a better understanding of how much has been exposed, some drawings are combined in which, schematically and only by way of non-limiting example, a practical case of realization is represented.

Figure 1 shows, in a perspective view, an exploded view of a support for awning arm with inclination adjustment device according to an embodiment of the present invention

Figure 2 corresponds to the exploded view of the same awning arm support of Figure 1, but in a perspective view from a side opposite that of Figure 1.

Figure 3 represents a perspective view of the intermediate piece and the pivoting part of the awning arm support of Figure 1.

Figure 4 is a view similar to Figure 3 but in which the angular adjustment means are also shown.

Figure 5 shows a front view of the fixed part of the awning arm support of Figure 1.

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Description of a preferred embodiment

An embodiment of the awning arm support with inclination adjustment device of the present invention is shown in Figures 1-5. In particular, the support 1 comprises: a fixed part 2 defining an axis of rotation E; a pivoting part 3 facing the fixed part 2 and coaxial to the axis of rotation E; an intermediate piece 4 arranged between the fixed part 2 and the pivoting part 3, said intermediate part 4 being rigidly coupled to the pivoting part 3 and coupled with the possibility of rotation to the fixed part 2, so that the intermediate part 4 and the part pivot 3 can rotate integrally with respect to the fixed part 2 about said axis of rotation E.

The fixed part 2 is capable of being fixed to a bearing element so that said axis of rotation E is parallel to the axis of winding of a canvas of the awning. For this, the fixed part 2 comprises a fixing member 30 with three orthogonal faces defining a trihedron angle. For its part, the pivoting part 3 is capable of supporting an arm of said awning.

Figures 1 and 2 show an exploded view of the support 1 for the awning arm in which the different parts that comprise it can be seen. Figure 1 provides a perspective view from the outer side of the fixed part 2, while Figure 2 corresponds to a perspective from the side of the pivoting part 3 to which the awning arm is linked.

As can be seen in the figures, the intermediate piece 4 comprises a body 5 of polygonal cross-section with a plurality of lateral faces 6, said body 5 being coaxially arranged to said axis of rotation E with its cross-section parallel to one side 7 of the pivoting part 3. The pivoting part 3 comprises on said face 7 a cavity 8 coaxial to the rotation axis E with lateral walls 9 adapted to fit on the lateral faces 6 of the body 5 of the intermediate piece 4.

The body 5 of the intermediate part 4 has a trunk-pyramidal shape, its cross section being smaller at a first end 10 of said body close to the pivoting part 3 and larger at a second end 11 of said body close to the fixed part 2 In addition, the cross section of the body 5 has a regular polygonal shape, in particular said shape is a regular octagon.

As for the pivoting piece, at least 75% of the surface of the face 7 of the piece

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pivot 3 is inside the perimeter defined by the side walls 9 of the cavity 8. In fact, as can be seen in figure 1, said percentage exceeds 90% of the surface of the face 7, since practically all of the face 7, originally circular in shape, has been lowered to create cavity 8.

Figure 3 shows the body 5 of the intermediate piece 4 fitted in the cavity 8 of the pivoting piece 3. Since the adjustment of the lateral faces 6 of the body 5 with the side walls 9 of the cavity 8 occurs far from the rotation axis E, a larger lever arm is obtained to rotate the awning arm. In addition, due to the regular octagonal geometry of the cross section of the body 5, the pivoting part 3 rotating 45 ° with respect to the intermediate piece 4, the body 5 can be fitted back into the cavity 8, thus allowing it to alternate between a regulation range angular from 0 ° to 45 °, and a second range of angular regulation from 45 ° to 90 °.

The awning arm support 1 further comprises angular adjustment means for placing the intermediate part 4 in a desired angular position with respect to the fixed part 2, thereby determining the degree of inclination of the awning arm; and an operable locking mechanism to approximate and secure the pivoting part 3 to the fixed part 2 and thereby gag the intermediate piece 4 between them.

The locking mechanism comprises a screw 12 adapted to be passed in the direction of the axis of rotation E through two axial through holes 13 and 14 formed, respectively, in the fixed piece 2 and the intermediate piece 4, and screwed in the piece pivot 3. In the embodiment described in the figures, the screw 12 can be screwed into a nut 16 retained in a housing 15 of the pivot part 3.

In Figure 2 it can be seen that the fixed part 2 comprises a groove 19 in the form of an arc of concentric circumference to the axis of rotation E. On the other hand, as seen in Figure 3, the body 5 of the intermediate part 4 comprises , on a transverse face 17 of said body facing the fixed part 2, a first projection 18 and a second projection 20 arranged in respective positions that define a second arc of concentric circumference to the axis of rotation E. In the example of the figures, the first projection 18 and the second projection 20 are connected by an intermediate section 21. However, in other examples of awning arm supports according to the present invention, the first and second projections are separated.

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The groove 19 is adapted to receive the first projection 18 during the rotation of the intermediate part 4 with respect to the fixed part 2. For this purpose, the angular adjustment means are coupled to the first projection 18 and the groove 19. The second projection 20 It is also adapted to fit in slot 19 of the fixed part 2.

The angular adjustment means of the awning arm support 1 are illustrated in Figures 2, 4 and 5. These comprise a first stud 22 passed through a hole 23 of the fixed part 2 and screwed into a first nut 24 housed at one end of the groove 19 of the fixed part 2. A first washer 25 retains the first nut 24 in its place. The stud 22 is mechanically coupled to the first boss 18 of the body 5 of the intermediate piece 4.

By manually turning the first stud 22 in the sense that it is screwed into the first nut 24, the first stud 22 pushes the first shoulder 18 upwards, causing the intermediate piece 4 (and the pivoting piece 3 to rotate with the awning arm attached to it) with respect to the fixed part 2. When turning the first stud 22 in the opposite direction, it is unscrewed from the first nut 24, moving downwards. The weight of the awning arm connected to the pivoting part 3 causes the intermediate piece 4 to rotate, so that the first projection 18 remains in contact with the first stud 22.

The angular adjustment means of the awning arm support 1 further comprise angular fixing elements for fixing the intermediate piece 4 in the angular position selected by said adjustment means. The angular adjustment means comprise a second stud 26 passed through a second hole 27 of the fixed part 2 and screwed into a second nut 28 housed at the end of the groove 19 of the fixed part 2 opposite the end where houses the first nut 24. A second washer 29 holds the second nut 28 in place. The second stud 26 is mechanically coupled to the second boss 20 of the body 5 of the intermediate piece 4 and is capable of immobilizing the angular position of the intermediate piece 4 for a direction of rotation of the intermediate piece 4 with respect to the fixed part 2. The First stud 22 is capable of immobilizing the angular position of said intermediate piece 4 for the opposite direction of rotation.

By manually turning the second stud 26 in the sense that it is unscrewed from the second nut 28, the second stud 26 moves down and stops being in

contact with the second projection 20. In this way, the angular position of

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the intermediate piece 4 acting on the first stud 22. Instead, when turning the second stud 26 in the opposite direction, it is screwed into the second nut 28, moving upwards until contacting the second boss 20 and pressing it firmly, fixing the position angle of intermediate piece 4.

Figure 4 shows how the first and second studs 22 and 26 are arranged in relation to the first and second projections 18 and 20 of the body 5 when an angular position of the intermediate piece 4 has been fixed. For clarity, in the Figure 4 the fixed part 2 has not been shown.

As described, to vary the angular position of an awning arm linked to the support 1 it is necessary, first, to loosen the screw 12 of the locking mechanism to separate the pivoting part 3 from the fixed part 2, thereby allowing a clearance between the fixed part and intermediate part 4. Secondly, the second stud 26 of the angular adjustment means must be unscrewed to allow the rotation of the intermediate part 4 with respect to the fixed part. Then, the angular position of the intermediate piece 4 can be varied by acting on the first stud 22. Once it is located in the desired angular position, the second stud 26 must be pressed to angularly immobilize the intermediate piece 4 and finally tighten the screw 12 to secure the pivoting part 3 to the fixed part 2, gagging between them the intermediate piece 4.

Although reference has been made to a specific embodiment of the invention, it is evident to one skilled in the art that the awning arm support with the inclination adjustment device described is susceptible to numerous variations and modifications, and that all mentioned details can be replaced by other technically equivalent ones, without departing from the scope of protection defined by the appended claims.

Claims (15)

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Support (1) for awning arm with inclination adjustment device, comprising: a fixed part (2) defining a rotation axis (E), the fixed part (2) being able to be fixed to a bearing element so that said axis of rotation (E) is parallel to the axis of winding of a canvas of the awning; a pivoting part (3) facing the fixed part (2) and coaxial to the axis of rotation (E), the pivoting part (3) being able to support an awning arm; an intermediate part (4) disposed between the fixed part (2) and the pivoting part (3), said intermediate part (4) being rigidly coupled to the pivoting part (3) and coupled with the possibility of rotation to the fixed part (2) ), so that the intermediate part (4) and the pivoting part (3) can rotate in solidarity with respect to the fixed part (2) around said axis of rotation (E); angular adjustment means for placing the intermediate part (4) in a desired angular position with respect to the fixed part (2), thereby determining the degree of inclination of the awning arm; and an operable locking mechanism to approximate and secure the pivoting part (3) to the fixed part (2) and thereby gag the intermediate piece (4) between them; characterized in that the intermediate piece (4) comprises a body (5) of polygonal cross section with a plurality of lateral faces (6), said body (5) being coaxially arranged to said axis of rotation (E) with its cross section parallel to a face (7) of the pivoting part (3); and because the pivoting part (3) comprises on said face (7) a cavity (8) coaxial to the axis of rotation (E) with lateral walls (9) adapted to fit on the lateral faces (6) of the body (5) of the intermediate piece (4). 2. Support for awning arm according to revindication 1, where the cross section of said body (5) has a regular polygonal shape. 3. Support for awning arm according to revindication 2, wherein said regular polygonal shape is a regular octagon. 4. Support for awning arm according to any one of claims 1 to 3, wherein the body (5) of the intermediate piece (4) has a trunk-pyramidal shape, its minor cross section being at a first end (10) of said body next to the pivoting part (3) and greater at a second end (11) of said body next to the fixed part (2). 5. Support for awning arm according to any of claims 1 to 4, wherein minus 75% of the surface of said face (7) of the pivoting part (3) is inside fifteen 5 10 fifteen twenty 25 30 35 of the perimeter defined by the side walls (9) of said cavity (8). 6. Support for awning arm according to any one of claims 1 to 5, wherein the locking mechanism comprises a screw (12) adapted to be passed in the direction of the rotation axis (E) through two holes (13, 14) through axial axes formed, respectively, on the fixed part (2) and the intermediate part (4), and screwed on the pivoting part (3). 7. Support for awning arm according to any of claims 1 to 6, wherein the body (5) of the intermediate part (4) comprises, on a transverse face (17) of said body facing the fixed part (2) , a first projection (18); wherein the fixed part (2) comprises a groove (19) in the form of an arc of concentric circumference to the axis of rotation (E), the groove (19) being adapted to receive said first projection (18) during the rotation of the part intermediate (4) with respect to the fixed part (2); and wherein the angular regulation means are coupled to said first projection (18) and to said groove (19). 8. Support for awning arm according to claim 7, wherein the angular adjustment means comprise a first stud (22) passed through a hole (23) of the fixed part (2) and screwed into a first nut (24 ) housed in one end of the groove (19) of said fixed part (2), said asparagus (22) being mechanically coupled to the first projection (18) of the body (5) of the intermediate part (4). 9. Support for awning arm according to claim 8, wherein the body (5) of the intermediate piece (4) comprises, on said transverse face (17) of the body, a second projection (20) adapted to fit in the groove (19) of the fixed part (2), and wherein the first projection (18) and the second projection (20) are arranged in two positions that define a second arc of concentric circumference to the axis of rotation (E). 10. Support for awning arm according to claim 9, wherein the angular adjustment means comprise angular fixing elements for fixing the intermediate piece (4) in the angular position selected by means of said angular adjustment means. 11. Support for awning arm according to claim 10, wherein the angular adjustment means comprise a second stud (26) passed through a second hole (27) of the fixed part (2) and screwed into a second nut ( 28) housed at the end of the groove (19) of said fixed part (2) opposite the end in which the first is housed 16 5 10 fifteen twenty 25 nut (24), said second stud (26) being mechanically coupled to the second boss (20) of the body (5) of the intermediate piece (4), the second stud (26) being able to immobilize the angular position of said intermediate piece (4) for a direction of rotation of the intermediate piece (4) with respect to the fixed part (2) and the first stud (22) being able to immobilize the angular position of said intermediate piece (4) for the opposite direction of rotation . 12. Support for awning arm according to any of the preceding claims, wherein the intermediate piece (4) is symmetrical with respect to a plane containing the axis of rotation (E). 13. Support for awning arm according to any of the preceding claims, wherein the intermediate piece (4) is integrally constituted of aluminum or zamak. 14. Support for awning arm according to any of the preceding claims, wherein the fixed part (2) comprises a fixing member (30) with three orthogonal faces defining a trihedron angle. 15. Awning, comprising: a drum for winding a canvas; a loading bar to which the leading edge of the canvas is attached; two supports capable of being fixed to a supporting element, arranged on both sides of the awning, to which the ends of articulated arms linked to the loading bar are linked to deploy or collect the canvas; wherein at least one of said two supports is according to any of the preceding claims.