ITPD20010050A1 - ARTICULATION MECHANISM FOR ROLLING BLINDS. - Google Patents

Description

ARTICULATION MECHANISM FOR CURTAINS

ROLLS UP

DESCRIPTION

The present patent relates to roller blinds and their joint mechanisms for outreach and closure. In particular, it concerns a new articulation mechanism for the opening and inclination of the folding arms of the roller blinds.

Rolling awnings are known, consisting of a cloth wrapped and unwound on a rotating shaft, a front bar applied to the extensible edge of the cloth, folding arms hinged to the front bar and to the bearing bar by means of particular joints designed to allow a controlled inclination towards the bottom of the awning and folding arms.

The current joints for tilting roller blinds contemplate various solutions aimed at limiting and adjusting the inclination of the arms of the roller awning both to orient their inclination and to prevent vertical oscillation in the event of wind.

The purpose of the present invention is to create a joint that is able to lock the arms in the correct position, preventing them from swinging.

Another object is to provide a joint with an easy opening in the initial phase.

A further purpose is to create a joint that allows you to adjust the inclination of the arms themselves.

All said purposes have been achieved as better specified below by a new articulation mechanism for roller blinds which is constituted in its main parts by a new support for fixing to the bearing bar with a new folding arm-holder lever hinged to it and by relative levers and elastic elements described below.

The description of the new articulation mechanism for roller blinds for display convenience is continued with reference to the attached tables by way of non-limiting example. The fixing support (7, figures 3a and 3b) to the bearing bar (1) consists of an element suitable both for fixing to said horizontal bearing bar (1) for alignment and connection to the wall, and for connection with the folding arm holder lever ( 5).

In particular, the part of the fixing support (7) opposite its connection to the bearing bar (1) has two vertical parallel wings (7.1).

On each of said two parallel wings (7.1) there are two through holes (7.21, 7.22) horizontal and parallel to the bearing bar (1). The lower pair of holes (7.21) forms the seat for the rotation pin of the folding arm holder lever (5).

The upper pair of holes (7.22) houses a barrel or cylinder (10) which has, in its median position, a threaded hole (10.1) perpendicular to the length of the barrel (10) itself.

A screw (9) with a spherical head (9.1) and seat (9.2) is screwed into this threaded hole (10.1) of the barrel (10) for screwing and unscrewing it with a tool.

The folding arm-carrying lever (5, figures 3a and 3c) consists of a particularly shaped element composed of a substantially U-shaped shape with, on one side of the U-shape, two wings (5.1) parallel to each other and perpendicular to the various walls ( 5.2, 5.3) of the U-shape, later called side wings (5.1).

The distance between the wings (5.3) of the U-shape (5) is substantially equal to the distance between the outer surfaces of the two wings (7.1) of the fixing support (7).

On the lower part of the wings (5.3) of the U-shape (5) there is a through hole (5.31) designed to house a pin (6) which is simultaneously housed in certain holes (5.31) of the wings (5.3) of the folding arm holder lever. (5) and in the lower holes (7.21) of the wings (7.1) of the fixing support (7).

This pin (6) acts as the rotation axis of the tilting arm holder lever (5) so as to allow the downward inclination of the folding arms (4) and consequently also of the awning.

An elastic element (12) is inserted between the fixing support (7) and the folding arm holder lever (5) in such a way as to exert a push, towards the outside T, between the fixing support (7) and the folding arm holder lever ( 5) thus generating a downward rotation of the folding arm holder lever (5) from the initial opening phase.

On the upper part of the central wall (5.2) of the U-shape (5) there are two orthogonal holes (5.21, 5.22) of which one (5.22) is horizontal, parallel to said central wall (5.2) and perpendicular to the wings (5.3) of the U shape (5) and the other (5.21) perpendicular to the central wall (5.2) of the U shape (5).

These two holes (5.21, 5.22) are communicating or have a portion in common. Substantially part of the lower half of the hole (5.22) parallel to the central wall (5.2) of the U-shape (5) is in common with the hole (5.21) perpendicular to said central wall (5.2).

The hole (5.21) perpendicular to the central wall (5.2) of the U-shape (5) has two different diameters and in particular the section with a larger diameter (5.211), opposite the wings (5.3) of the U-shape (5), is such as to allow the passage of the spherical head (9.1) of the screw (9) screwed into the barrel (10) of the fixing support (7) while the smaller diameter section (5.212), facing the wings (5.3) of the U-shape (5), is such as to allow the passage of only the threaded body of the aforementioned spherical head screw (9) (9.1). In fact, the spherical head screw (9) (9.1) is inserted in the perpendicular hole (5.21) of the central wall (5.2) of the U-shape (5) and is screwed into the threaded hole (10.1) of the barrel (10) of the support fastening (7).

By screwing or unscrewing this spherical head screw (9) (9.1), the rotation and maximum downward inclination of the tilting arm holder lever (5), of the arm (4) and consequently also of the awning are determined.

The hole (5.22) parallel to the central wall (5.2) of the U-shape (5) accommodates a preferably L-shaped pin (11). The pin (11) is housed in said hole (5.22) of the central wall (5.2) so that its longer side (11.1) is inside the hole (5.22) and its smaller side (1 1.2) is on the side of the side wings (5.1) of the folding arm holder lever (5). In this way the longer side (11.1) of the L-shaped pin (11) crosses the perpendicular hole (5.21) of the central wall (5.2) of the U-shape (5) limiting its section.

The end of said L-shaped pin (11) opposite to the shorter side (11.2) is connected to the folding arm holder lever (5) by means of an elastic element (15) which holds the shorter side (1 1.2) of said pin (11) next to the folding arm holder lever (5).

The surface of the longer side (11.1) of the L-shaped pin (11) is not perfectly cylindrical but has a hollow or concave annular groove (11.11) near the end of the longer side (11.1). In particular, the portion with groove (1 1.1 1) of the longer side (11.1) of the L-shaped pin (11) normally remains between the hole (5.21) perpendicular to the central wall (5.2) of the U-shape (5) and the wing (5.3) of the U-shape (5) opposite the shorter side (1 1.2) of the L-shaped pin (11).

By overcoming the resistance of the elastic element (15) at the end of the L-shaped pin (1 1), or by translating it so that the smaller side (1 1.2) of the L-shaped pin (11) moves away from the wing (5.3) of the U-shape (5), the groove (11.11) is located in correspondence with the hole (5.21) perpendicular to the central wall (5.2) of the U-shape (5) and in particular the groove (11.11) completely frees said hole (5.21 ) of said central wall (5.2). When the groove (11.11) of the L-shaped pin (11) completely frees the hole (5.21) of the central wall (5.2), the spherical head (9.1) of the screw can slide freely, allowing the tilting arm holder lever (5) to tilt, when the L-shaped pin (11) limits the section of the hole (5.21) of the central wall (5.2) the spherical head (9.1) of the screw (9) is immobilized on the bottom of the hole (5.21) of the central wall (5.2) blocking accordingly rotation of the folding arm holder lever (5) on the fixing support (7).

The side wings (5.1) of the U-shape (5), parallel and horizontal, each have a vertical hole (5.1 1) suitable for housing a rotation pin (17).

In fact, between these wings (5.1) houses the male end (4.1) of the folding arm (4) equipped with a vertical hole (4.11) in which the rotation pin (17) is housed.

A lever (13) connected to the folding arm (4) acts on the smaller side (11.2) of the L-shaped pin (11) and in particular in the closing rotation of the folding arm (4) a traction is exerted on said smaller side (11.2 ) of the L-shaped pin (11) overcoming the resistance of the elastic element (15) present at the end of the longer side (11.1) of the L-shaped pin (11) while in the opening rotation of the folding arm (4) the pin is released L-shaped (11) favoring the action of the elastic element (15) present at the end of the longer side (11.1) of the L-shaped pin (11).

The hole (5.1 1, figure 2b) of the upper side wing (5.1) of the folding arm holder lever (5) is larger than the diameter of the rotation pin (17); on this lateral wing (5.1) there is also a threaded hole (5.12) with adjustment dowel (5.13) arranged perpendicularly to the wings (5.3) of the U-shape of the folding arm holder lever (5). The adjustment dowel (5.13) allows the adjustment of the axis of the rotation pin (17) of the arm (4) and consequently of the inclination of the folding arm (4) when closed.

What has been described so far for the folding arm (4) with male end and folding arm holder lever (5) with side wings (5.1), female, is also valid and can be used for folding arm (4) with female end, two parallel wings, and lever folding arm holder (5) male, with a single thick side wing.

The articulation mechanism for roller blinds thus constituted has considerable advantages:

- it is no longer necessary to weigh down the front bar to favor the downward inclination of the folding arm holder lever (5) but this inclination is forcedly caused by the elastic element (12) present between the fixing support (7) and the arm holder lever tipper (5);

- the L-shaped pin (11), which blocks the spherical head (9.2) of the adjustment screw (9) of the maximum inclination of the tilting arm holder lever (5), is translated in opposition to its elastic element (15) by the arm ( 4) in opening while it is returned to the locking position by its elastic element (15);

- the inclination due to the weight of the parts of the foldable arm (4) closed is compensated by the adjustment dowel (5.13) placed perpendicular to the wings (5.3) of the U-shape of the folding arm holder lever (5)

- another advantage of this invention consists in the fact that for any inclination of the tilting arm lever (5), the L-shaped pin (11) locks the spherical head (9.1) of the screw (9) always in tangency (as can be observed from the inclined arm-carrying lever section (5), figure 3d) so as to reduce to zero the play of the lever lever (5) - support (7), which is moreover harmful to the system in the event of gusts of wind;

- the same elastic element (12), whose main task is to ensure the overturning of the arm-holder lever (5), also has a secondary use of contrasting the gusts of wind in the presence of play in the system.

A second embodiment is provided, illustrated in Figures 4, 5, 6, 7, in which a plate (14) with a cam (14.1) is applied to the folding arm (4) instead of the traction lever (13). push on the smaller side (11.2) of the L-pin (1 1). In this solution, the groove (1 1.1 1) of the L-shaped pin (11) is pushed in the opposite direction instead of being approached to the side wings (5.1), limiting in any case the section of the hole (5.21) perpendicular to the central wall (5.2) of the U shape (5). Figure 2b illustrates a section of the detail of the adjustment dowel (5.13) which insists on the rotation pin (17) of the arm (4) modifying its position in order to adjust the inclination of the arm (4) with respect to the lever (5 ).

It should be noted that this adjustment is made possible by the fact that the lever (5) - arm (4) coupling occurs thanks to the fact that the connection of the lever (5) is female while the connection of the arm (4) is male.

These are the schematic modalities sufficient for the skilled person to realize the invention, consequently, in concrete application there may be variations without prejudice to the substance of the innovative concept.

Therefore, with reference to the preceding description and to the attached table, the following claims are expressed.

Claims (7)

CLAIMS Articulation mechanism for roller awnings having a fabric wound and unwound on a rotating shaft, a front bar applied to the extensible edge of the fabric, folding arms hinged to the mechanism and to the front bar and to the bearing bar, and where each articulation mechanism is composed by a support for fixing to the bearing bar and by a folding arm-carrying lever, characterized in that the fixing support is equipped with at least one hole that houses a barrel or cylinder equipped with a central threaded hole in which a limiting element is inserted and adjustment of the inclination of the folding arm holder lever. Articulation mechanism for roller blinds as per claim 1, characterized by the fact that the folding arm-carrying lever has two intersecting holes, one of which is parallel and one is orthogonal to the limiting and adjustment element of the inclination, and where said parallel hole is such to accommodate the end of the limiting and adjusting element of the inclination of the tilting arm-carrying lever, and where said hole orthogonal to the limiting and adjusting inclination element accommodates a device for locking and releasing the end of the limiting element and adjustment above. Articulation mechanism for roller blinds as per claim 2, characterized by the fact that an elastic element exerts the action of moving the locking and release device in locking of the limiting and inclination adjustment element. 4 Articulation mechanism for roller blinds as per claim 3, characterized in that the folding arm has a lever applied to said locking and release device in correspondence with its hinge with the folding arm-carrying lever. Articulation mechanism for roller blinds as per claim 4, characterized by the fact that the lever of the folding arm contrasts the action of the aforementioned elastic element for the entire closing excursion of the arm or of the awning except for its terminal section in which the folding arm holder lever resumes the horizontal position, and vice versa this mechanism or lever of the folding arm releases the action of the aforementioned elastic element immediately after the start of the unwinding and opening of the awning or as soon as the folding arm holder lever tilts with respect to the horizontal. Articulation mechanism for roller awnings having a fabric wound and unwound on a rotating shaft, a front bar applied to the extensible edge of the fabric, folding arms hinged to the mechanism and to the front bar and to the bearing bar, and where each articulation mechanism is composed by a support for fixing to the bearing bar and by a folding arm holder lever, characterized by the fact of having an elastic element between the fixing support and the folding arm holder lever able to favor and force the tilting of the folding arm holder lever with respect to the support as soon as the cloth is unwound. 7. Articulation mechanism for roller awnings having a fabric wound and unwound on a rotating shaft, a front bar applied to the extensible edge of the fabric, folding arms hinged to the mechanism and to the front bar and to the bearing bar, and where each articulation mechanism is composed of a support for fixing to the bearing bar and a folding arm holder lever, characterized by the fact that the folding arm holder lever has a female attachment on the upper wing of which there is a threaded hole with an adjustment dowel inserted, preferably parallel to the fixing, which insists on the rotation pin of the folding arm, so as to allow the adjustment of the inclination of said rotation pin of the folding arm and where the upper seat of the rotation pin is slotted.