EP3235968A1 - Assembly of pivoting arm for blind and associated installation method - Google Patents

Abstract

The invention relates to a pivoting arm assembly for a blind, comprising an arm (1) and an arm support (2), an axial articulation (A) provided with a convex cylindrical surface (S), comprising an element of biasing (3) the arm toward the deployed position, being the biasing member (3) provided with an attachment end (31) at the union end (13), a cable segment (32) wound on the convex cylindrical surface (S), a fastening end (33) to be fixed with respect to the arm support (2), a spring (34) arranged between the fastening end (31) and the cable segment ( 32) and an adjustable length segment (35) between the attachment end (31) at the union end (13) and the spring (34). It also relates to a mounting method of the assembly.

Description

Technical sector of the invention

The present invention relates to a pivoting arm awning whose characteristics give it more mounting possibilities than the pivoting arms of the prior art. In particular, the object of the arm of the present invention makes it possible to preload the internal elastic element without a clean / specific tool for this purpose. The invention also relates to a method of mounting this arm.

Technical background of the invention

Awning pivot arm sets are known, comprising an arm and an arm support for attachment to a fixed structure.

The pivoting is done by means of an axial articulation between the arm support and the arm which makes it possible to pivot the arm with respect to the arm support between a folded position and an extended position.

The arm is composed of an arm section, a hinge end and a union end to a blind extension bar.

The axial joint includes a convex cylindrical surface and the arm includes a biasing member of the arm toward the deployed position. The biasing member has a fastening end at the union end, a cable segment wound on the convex cylindrical surface, a fastening end for the arm support and a spring located between the fastening end and the segment. of cable.

The cable is wound on the convex surface, which is coaxial with the hinge axis, so that the length of the biasing element tends to shorten as the arm moves to the deployed position, that is, that is, the arm will tend to stretch the awning fabric, which will expand by the action of the spring. That is, the biasing member is tensioned to be balanced in the absence of other forces, the arm is deployed.

To fold the blind, the winder must overcome the pulling force of the biasing element, so that the blind can be folded or brought to the retracted position.

In order for the arm, or the arms, because there will usually be two of them, to be able to deploy the cloth, and also to keep it taut, it is necessary that the biasing element, which is generally a helical spring, be tightly tensioned. to ensure sufficient strength to overcome the resistance of the canvas. To perform prestressing, it is necessary to have a special tool, which implies limitations as to where the arm can be mounted.

It often happens that an intermediate client needs to give a particular aspect to the arm, especially to paint it with a certain color. However, it is the arm manufacturer that usually has the spring preloader, which means it will be the latter who will have to paint the arm before sending it to the intermediate client, who usually does not have the 'tool. This means that it will have to carry out the painting operation before sending it to the intermediate customer, which implies high storage costs and differential treatment, especially as regards the limited series.

As a result, a technical solution is missing that allows the intermediate customers to receive the dismantled arms to proceed to their own custom finishing, before mounting the spring, but without having to acquire the tensioning tool and the necessary personnel. to use it.

Description of the invention

To overcome the drawbacks of the prior art, the present invention proposes a set of pivot arm for blind, comprising an arm and an arm support intended to be fixed to a fixed structure, comprising an axial articulation between the arm support and the arm which pivots the arm relative to the arm support between a folded position and an extended position, the arm being provided with an arm section, a hinge end and a union end at a blind extension bar, the axial articulation being provided with a convex cylindrical surface and coaxial with the hinge axis, the arm comprising a biasing element of the arm towards the deployed position, the biasing element being provided with from a fastening end to the union end, a cable segment wound on the convex cylindrical surface, a fixing end to be fixed relative to the arm support and a reso located between the fixing end and the cable segment, and comprising a segment of adjustable length between the attachment end at the union end. and the spring.

Thus, it is no longer necessary for the assembly step to have a specialized tool as mentioned before, so that the arm can be mounted anywhere there are means to adjust the length of the segment adjustable length.

In some embodiments, the adjustable length segment is composed of an internally threaded tube and a threaded rod or screw screwed to the tube.

This is a very simple embodiment of the adjustable length segment that can be easily housed inside the arm section.

In some embodiments, the end of union to a blind extension bar is provided with a first segment of casing in the arm section, a second segment oblique with respect to the first segment and a tercer segment parallel to the first segment, the union end being provided with a through hole parallel to the first segment and at the transition between segments the first and the second segment.

The threaded rod or screw is inserted into the through hole of the union end, the head of the threaded rod or screw having a shape suitable for handling with a tool, the head being accessible from the outside.

With these features it is possible to easily access the end of the threaded rod or screw for adjusting the tension of the biasing element.

In some embodiments, the hinge end comprises a hollow cylindrical body with an axis coinciding with the axis of articulation and a casing extension in the arm section perpendicular to the axis of articulation.

In some embodiments, the assembly comprises a concentric hinge cylinder with the cylindrical body and disposed in its interior so that, between the cylindrical body and the hinge cylinder, is defined a cylindrical volume for the housing of the cable segment wound on the convex cylindrical surface, the outer surface of the hinge cylinder being the convex surface, the hinge cylinder being provided with a through axial channel for the passage of a fastening screw of the hinge.

In some embodiments, the hinge cylinder is a part of the arm support. Thus, the assembly is very simple because since the cylinder is accessible, first the end of the cable segment is fixed to the arm support, after it is wound on the cylindrical surface, to finally be introduced by an opening to the inside of the arm for its anchorage to the spring.

In some embodiments, the arm support comprises a cylindrical body of diameter coinciding with the cylindrical body of the articulation end, the cylindrical body being provided with a notch for fixing the fixing end of the biasing element. , the cylindrical body being provided with a through fixing hole axially coinciding with the axial channel passing through the articulation cylinder, the through-fixing hole being widened for the support of a screw head.

It is also expected that the arm support has a first attachment plate joined to the cylindrical body and contained in a plane perpendicular to the hinge axis, and a second attachment plate joined to the first attachment plate by an edge, the plane of the second fixing plate being parallel to the hinge axis.

In some embodiments, the assembly comprises a ring provided convex and an anchoring of the fixing end of the biasing element, the ring being partially located on one of its sides in the hollow cylindrical body anchoring the the hinge end, the ring being on the other of its sides provided with projections, the arm support comprising a cylindrical body provided with recesses of complementary shapes to the projections, so that the cooperation between the projections and the hollows block the rotation of the ring.

By the use of this ring as an intermediate piece, assembly of the assembly is facilitated because the fixing of the end of the cable is done in two stages, first immobilization with respect to the ring, then immobilization of the ring relative to the arm support.

In some embodiments, the ring comprises a perimeter channel for housing the wound cable segment.

In some embodiments, the anchoring of the attachment end of the biasing element is a cavity in the ring in communication with the perimeter channel.

In some embodiments, the ring comprises an axial through channel for the passage of a coupling screw between the end of the arm and the arm support.

In some embodiments, the hollows of the cylindrical body delimit between them ribs having the shape of a T, so that they allow only the casing of the projections of the ring in a position.

In some embodiments, the ring is plastic.

• Introduire l'élément de sollicitation dans le bras;
• Enrouler le segment de câble sur la surface cylindrique convexe de la bague;
• Fixer l'extrémité de fixation à la bague;
• Introduire la bague dans le corps cylindrique du bras;
• Introduire les saillies de la bague dans les creux du corps cylindrique du support de bras;
• Fixer l'extrémité de fixation à l'extrémité d'union;
• Régler la longueur du segment de longueur réglable.

The invention also relates to a method of coupling a blind swivel arm assembly to any one of the ring-provided variants, comprising the steps of:

• Introduce the biasing element into the arm;
• Wrap the cable segment on the convex cylindrical surface of the ring;
• Fix the fixing end to the ring;
• Insert the ring into the cylindrical body of the arm;
• Insert the projections of the ring into the recesses of the cylindrical body of the arm support;
• Fix the fixing end to the union end;
• Set the length of the adjustable length segment.

Brief description of the drawings

• La figure 1 est une perspective de l'ensemble monté.
• La figure 2 est une vue analogue à la figure 1, mais ici le profilé de bras a été retiré de sorte que l'on puisse apprécier la disposition interne du ressort et du segment de longueur réglable.
• La figure 3 est un agrandissement de l'extrémité d'union du bras à la barre frontale du store (non représenté).
• La figure 4 montre la pièce formant l'extrémité d'articulation du bras.
• La figure 5 montre l'emboîtage du support de bras sur l'extrémité d'articulation.
• La figure 6 est analogue à la figure 5, mais ici le support de bras et l'extrémité d'articulation ont été fixés par une vis et un couvercle a été mis en place pour cacher la tête de vis.
• La figure 7 montre le support de bras.
• La figure 8 montre la disposition de l'extrémité de l'élément de sollicitation.
• La figure 9 montre l'articulation du bras, montée.
• La figure 10 montre la position relative de la bague par rapport au support de bras.
• La figure 11 montre le support de bras pourvu d'un creux de blocage de la bague.
• La figure 12 montre l'emboîtement de la bague sur l'extrémité du bras.
• Les figures 13 et 14 montrent l'extrémité de bras et le support de bras couplés, avec interposition de la bague.
• La figure 15 montre en vue éclatée l'ensemble extrémité de bras, support de bras et bague.
• La figure 16 montre dans son ensemble l'élément de sollicitation.
• Les figuras 17 et 18 montrent l'ancrage de l'élément de sollicitation dans la bague.
• Les figures 19 a 21 montrent des détails de la bague, tels que les creux de blocage sur le support de bras, le canal d'insertion du segment de câble enroulé, la cavité/entaille de blocage de l'extrémité du câble, et sa forme d'enveloppe cylindrique pour l'emboîtage dans des cavités complémentaires de l'extrémité de bras et du support de bras.

To complete the description and in order to help a better understanding of the features of the invention, according to an exemplary practical embodiment thereof as an integral part of the description, here is a set of drawings to illustrate not limitation the invention, where is represented:

• The figure 1 is a perspective of the assembled set.
• The figure 2 is a view similar to the figure 1 , but here the arm section has been removed so that one can appreciate the internal arrangement of the spring and adjustable length segment.
• The figure 3 is an enlargement of the union end of the arm at the front bar of the blind (not shown).
• The figure 4 shows the piece forming the articulation end of the arm.
• The figure 5 shows the casing of the arm support on the hinge end.
• The figure 6 is analogous to the figure 5 but here the arm support and the hinge end were fixed by a screw and a cover was put in place to hide the screw head.
• The figure 7 shows the arm support.
• The figure 8 shows the disposition of the end of the biasing element.
• The figure 9 shows the articulation of the arm, mounted.
• The figure 10 shows the relative position of the ring relative to the arm support.
• The figure 11 shows the arm support provided with a locking recess of the ring.
• The figure 12 shows the interlocking of the ring on the end of the arm.
• The Figures 13 and 14 show the arm end and the arm support coupled, with interposition of the ring.
• The figure 15 shows in exploded view the arm end assembly, arm support and ring.
• The figure 16 shows as a whole the solicitation element.
• Figures 17 and 18 show the anchoring of the biasing element in the ring.
• The figures 19 a 21 show details of the ring, such as the locking recesses on the arm support, the insertion channel of the wound cable segment, the locking cavity / notch of the end of the cable, and its shape. cylindrical casing for fitting into complementary cavities of the arm end and the arm support.

Description of Embodiments of the Invention

As can be appreciated on the figure 1 , the invention relates to a set of pivot arm for blind (not shown), comprising an arm 1 and an arm support 2 intended to be fixed to a fixed structure.

In the figure only one arm 1 has been shown, but obviously, there will be another complementary arm A axis coinciding.

This axial articulation A between the arm support 2 and the arm 1 makes it possible to pivot the arm 1 with respect to the arm support 2 between a folded position, that which is shown on the figure 9 and an unfolded position.

The arm 1 is composed of an arm section 11, a hinge end 12 and a union end 13 to a blind extension bar. In this case, the union end 13 ends with a bearing zone formed by two surfaces forming a V for the pressure support of the front extension bar of the blind.

As can be appreciated on the figure 8 , the axial joint A comprises a convex cylindrical surface S, whose function will be explained later.

As can be appreciated on the figure 2 , the arm comprises a biasing element 3 of the arm to the deployed position. This biasing element 3 is in turn formed by a fastening end 31 at the union end 13, a cable segment 32 wound on the convex cylindrical surface S, a fixing end 33 to the support arm 2 and a spring 34 disposed between the fixing end 31 and the cable segment 32.

Then, when the arm is pivoted about the axis of rotation A, the biasing element is forced to increase or reduce its length, in the direction of rotation, and thus to change the voltage state of the spring 34. This is due to the fact that the end of the cable is wound on the convex surface S, which is concentric with the axis of articulation.

According to the present invention, the assembly comprises an adjustable length segment 35 between the fastening end 31 at the union end 13 and the spring 34. This adjustable length segment makes it possible to mount the solicitation without high voltages, so that, once mounted, it is possible to adjust the spring tension using the adjustable length segment 35.

As can be appreciated on the figure 3 for example, the adjustable length segment 35 is composed of an internally threaded tube 37 and a threaded rod or screw 36 screwed onto the tube 37. Then, to tension the spring 34, it suffices to screw the screw 36 on the tube 37.

To be able to tap comfortably, the configuration of the union end 13 described later is provided.

Specifically, as shown on the figure 3 , the union end 13 is provided with a first segment 131 of casing in the arm section 11, a second segment 132 oblique with respect to the first segment 131 and a third segment 133 parallel to the first segment 131.

At the transition between the first 131 and second 132 segments, there is a through hole 134 parallel to the first segment 131 and the segments can be accessed at the head of the screw 36 for the tensioning of the element. solicitation.

For this, the head 361 of the threaded rod or screw 36 is provided with a shape suitable for handling with a tool.

and as we can appreciate on the figure 4 the hinge end 12 comprises a hollow cylindrical body 121 with an axis coinciding with the hinge axis A and an extension 122 of casing in the arm section 11 perpendicular to the hinge axis A.

As can be appreciated on the figure 7 , the assembly comprises a hinge element 123 concentric with the cylindrical body 121. This element may be cylindrical or cone section, preferably small opening angle.

This hinge cylinder, or cone section element 123, belongs to the arm support, as shown in FIG. figure 4 .

This hinge element 123 must be placed, when the assembly is mounted, inside the cylindrical body 121 so that there remains between them a cylindrical volume 124 for housing the cable end.

The outer surface of the hinge cylinder 123 is the convex surface S on which the cable segment 32 of the biasing element is wound, and thus constitutes the innermost delimiting surface of the cylindrical volume.

The articulation cylinder has an axial channel 125 passing through for the passage of a fixing screw of the articulation A.

As it is shown on the figure 7 , the hinge cylinder 123 is a part of the arm support 2, that is to say that it comes from one of the plates 23 which form the support. As seen in this figure, cable assembly is easy because access to the outer surface S of the cylinder is easy.

The assembly of the cable can be done in two ways with respect to the cylinder or articulation member 123. In particular, it can be wound on the surface S so that the extension of the spring occurs either when the arm is raised or well when you drop it. If, as usual, it is desirable for the arms to tend, by the force of the spring, to descend and therefore to unroll the blind fabric, then the cable coming from the inside of the arm will have to be wound under the cylinder hinge 123.

The arm support 2 comprises a cylindrical body 21 of diameter coinciding with the cylindrical body 121 of the articulation end 12.

According to one embodiment, this cylindrical body 21, as shown on the figure 7 , comprises a notch 22 for fixing the fixing end 33 of the biasing element 3.

According to another embodiment, and as shown on the Figures 10 to 21 , the assembly comprises a ring 4 provided on its outer surface with the convex cylindrical surface S and an anchorage 42 of the fixing end 33 of the biasing element 3.

As it is shown on the figure 12 this ring 4 is partially on one of its sides in the hollow cylindrical body 121 anchoring the hinge end 12, so that it can rotate in its interior, then the ring is fixed relative to the support of arm 2.

Moreover, as it is illustrated on the figure 12 , the ring 4 has on the other side of it protrusions 43., as we appreciate on the figure 11 , the arm support 2 comprises a cylindrical body 21 provided with recesses 26 of complementary shapes to the projections, so that the cooperation between the projections 43 and the recesses 26 block the rotation of the ring 4.

To ensure proper positioning of the wound cable segment 32 in the ring 4, it comprises a perimetric channel 44 for housing the wound cable segment 32, leading to a cavity 42 in the ring 4.

As can be appreciated on the figure 15 , the recesses 26 of the cylindrical body delimit between them ribs 27 having the shape of a T, so that they allow only the casing of the projections 43 of the ring in a position. On the figure 21 it can be seen that the projections delimit between them the shape of a complementary T. Thus, a polarizing mounting device is formed, so that the end of the cable will always be correctly mounted.

As we see on the figure 15 the ring also comprises an axial through channel 41 for the passage of a coupling screw T between the end of the arm 12 and the arm support 2.

• Introduire l'élément de sollicitation 3 dans le bras 1;
• Enrouler le segment de câble 32 sur la surface cylindrique S convexe de la bague 4;
• Fixer l'extrémité de fixation 33 à la bague 4;
• Introduire la bague 4 dans le corps cylindrique 121 du bras 1;
• Introduire les saillies 43 de la bague 4 dans les creux du corps cylindrique 21 du support de bras 2;
• Fixer l'extrémité de fixation 31 à l'extrémité d'union 13;
• Régler la longueur du segment de longueur réglable 35.

The method of coupling the awning pivot arm assembly according to the invention is realized according to these steps:

• Insert the biasing element 3 into the arm 1;
• Winding the cable segment 32 on the convex cylindrical surface S of the ring 4;
• Fix the fixing end 33 to the ring 4;
• Insert the ring 4 into the cylindrical body 121 of the arm 1;
• Insert the projections 43 of the ring 4 into the recesses of the cylindrical body 21 of the arm support 2;
• Fix the fixing end 31 to the union end 13;
• Set the length of the adjustable length segment 35.

This method is very simple and convenient for the user, because it avoids assembly errors and work without energized elements.

On the other hand, this cylindrical body 21 is provided with a through-fixing hole 25 coinciding axially with the axial channel 125 passing through the hinge cylinder 123, the hole fastening 25 being widened for the support of a screw head.

Finally, as it is shown on the figure 7 the arm support 2 comprises a first fixing plate 23 joined to the cylindrical body 21 and contained in a plane perpendicular to the hinge axis A, and a second fixing plate 24 joined to the first fixing plate 23 by a edge, the plane of the second attachment plate 24 being parallel to the hinge axis A.

Moreover, the invention is not limited to the specific embodiments that have been described, but it also covers, for example, variants that can be made by those skilled in the art, in that which is deduced from demands.

Claims (15)

A swivel arm assembly for a blind comprising an arm (1) and an arm support (2) for attachment to a fixed structure, comprising an axial joint (A) between the arm support (2) and the arm (1). ) which rotates the arm (1) relative to the arm support (2) between a folded position and an extended position, being provided with the arm (1) of an arm section (11), an end d hinge (12) and a union end (13) to a blind extension bar, being provided with the axial articulation (A) of a convex cylindrical surface (S), comprising a biasing element ( 3) from the arm to the deployed position, being the biasing member (3) provided with an attachment end (31) at the union end (13), a cable segment (32) wound on the surface cylindrical (S) convex, a fixing end (33) to be fixed relative to the arm support (2) and a spring (34) arranged between the fixing end one (31) and the cable segment (32), characterized in that it comprises an adjustable length segment (35) between the fixing end (31) at the union end (13) and the spring (34). The assembly of claim 1, wherein the adjustable length segment (35) is comprised of an internally threaded tube (37) and a threaded rod or screw (36) threaded onto the tube (37). An assembly according to any one of the preceding claims, wherein the union end (13) to a blind extension bar is provided with a first casing segment (131) in the arm section (11). a second segment (132) oblique to the first segment (131) and a tercer segment (133) parallel to the first segment (131) being provided with the union end of a through-hole (134); ) parallel to the first segment (131) and at the transition between the first (131) and second (132) segments. An assembly according to claims 2 and 3, wherein the threaded rod or screw (36) is inserted into the through hole (134) of the union end (13), being the head (361) of the threaded rod or screw (36) provided with a forma suitable for actuation with a tool, being the head (361) accessible from the outside. An assembly according to any one of the preceding claims, wherein the hinge end (12) comprises a hollow cylindrical body (121) with an axis coincident with the hinge axis (A) and an extension (122) of casing in the arm section (11) perpendicular to the hinge axis (A). An assembly according to claim 5, comprising a cylinder, or frustoconical section member hinge (123) concentric with the cylindrical body (121) and arranged in its interior so that is defined between the cylindrical body (121) and the cylinder hinge (123) a cylindrical volume (124) for accommodating the cable segment (32) wound on the convex cylindrical surface (S), being the outer surface of the hinge cylinder (123) the convex surface (S) , being provided with the hinge cylinder (123) of an axial channel (125) therethrough for the passage of a fixing screw of the hinge (A). An assembly according to claim 6, wherein the hinge cylinder (123), or frusto-conical section member, is a part of the arm support (2). An assembly according to any one of claims 5 to 7, wherein the arm support (2) comprises a cylindrical body (21) of diameter coincident with the cylindrical body (121) of the hinge end (12), being provided with the body cylindrical (21) of a notch (22) for fixing the fixing end (33) of the biasing element (3), being the cylindrical body provided with a through-fixing hole (25) axially coincide with the axial channel (125) passing through the hinge cylinder (123), being widened the through-fixing hole (25) for the support of a screw head. An assembly according to claim 8, wherein the arm support (2) comprises a first attachment plate (23) joined to the cylindrical body (21) and contained in a plane perpendicular to the hinge axis (A), and comprising a second attachment plate (24) joined to the first attachment plate (23) by an edge, being the plane of the second attachment plate (24) parallel to the hinge axis (A). An assembly according to claim 5, comprising a ring (4) provided on its outer surface with the convex cylindrical surface (S) and an anchorage (42) of the attachment end (33) of the biasing element (3). ), being the ring (4) partially arranged on one of its sides in the hollow cylindrical body (121) anchoring the hinge end (12), being the ring (4) on the other of its sides provided with projections (43), comprising the arm support (2) a cylindrical body (21) provided with recesses (26) of complementary shapes to the projections, so that the cooperation between the projections (43) and the recesses (26) block the rotation of the ring (4). An assembly according to claim 10, wherein the ring (4) comprises a perimeter channel (44) for housing the wound cable segment (32). The assembly of claim 10, wherein the anchoring (42) of the attachment end (33) of the biasing member (3) is a cavity in the ring in communication with the perimeter channel (44). An assembly according to any one of claims 10 to 12, wherein the recesses (26) of the cylindrical body delimit between them ribs (27) having the shape of a T, so that they allow only the casing of the projections (43) of the ring in one position. An assembly according to any one of claims 10 to 13, wherein the ring comprises an axial through channel (41) for the passage of a coupling screw (T) between the end of the arm (12) and the arm support (2). ) and wherein the ring (4) is plastic. A method of coupling a blind swivel arm assembly according to any one of claims 10 to 14, comprising the following steps: - Insert the biasing element (3) into the arm (1); - Wrap the cable segment (32) on the convex cylindrical surface (S) of the ring (4); - Fix the fixing end (33) to the ring (4); - Insert the ring (4) in the cylindrical body (121) of the arm (1); - Insert the projections (43) of the ring (4) into the recesses of the cylindrical body (21) of the arm support (2); - Fix the fixing end (31) to the union end (13); - Set the length of the adjustable length segment (35).

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