EP2440733B1 - Roller blind mounting assembly, including a tubular shaft - Google Patents

Description

The invention relates to a roller shutter mounting assembly of the type which comprises a tubular shaft which serves for winding and unwinding a roller shutter, a nozzle being provided for engaging in the shaft, the tip being traversed by an axis, one end of which, intended to be engaged in the tubular shaft, is equipped with a core for a connection in rotation with the shaft, the other end of the axis being intended to be received in a bearing bearing housing, the relative position of the nozzle along the length of the axis may vary according to the dimensions of the tubular shaft and the installation conditions of the shutter.

The patent application FR 2,877,689 shows a mounting assembly of the kind defined above and corresponding to the preamble of claim 1.

In the case of a roller shutter used as a garage door, a standard requires the use of a shutter fall arrest device or "stop fall" on the opposite side to the drive means, often consisting of a motor electric. The design of the fall stop allows it to block an axis, linked in rotation to the tubular shaft, in the case of the rupture of a component of the engine (brake, gear, fixed point of the engine, ...). The fall stop device responds to a strong acceleration or an excessive speed of the shaft. The adjustable tip installed on the side opposite the drive means must provide a rigid connection between the tubular shaft of the flap and the axis on which the tip is mounted, this axis being engaged in a bearing of the fall stop device. A square section axis is generally used, capable of supporting the resistive torque. To maintain the notion of adjustment in length, it is necessary to ensure a possibility of translation between the tip and the axis, while providing an effective locking in translation of the tip relative to the axis.

The object of the invention is, above all, to propose a mounting assembly with a blocking in translation of the endpiece which, while being simple, retains its efficiency over time, and prevents, in one direction at least, any relative sliding between the axis and the tip.

According to the invention, a roller shutter mounting assembly, of the kind defined above, is characterized in that it comprises a locking device in translation of the tip on the axis which comprises a stirrup having two spaced walls connected by a bridge, each wall having a window traversed by the axis, the bridge being provided with a pressure means located between the walls for exerting a clamping of the axis on an edge of the windows, said axis having notches distributed in a step along the length, with which can cooperate the edge of at least one window of the stirrup for a positive stop of the stirrup on the shaft and to lock the end against the stirrup.

Preferably, the distance between the edges of the windows provided to cooperate with the notches is equal to an integer number of steps of the notches of the axis, increased by a half-step, a single edge cooperating with a notch, the adjustment being possible thus be done half-step by half-step.

The stirrup may be metallic, in particular steel. The stirrup can have substantially the shape of an inverted U.

The cross section of the axis can be regular polygonal, in particular hexagonal or square. The end of the axis located on the side of the stirrup opposite the endpiece may be provided to cooperate with a square housing of a fall stop device.

Advantageously, the axis has a polygonal section, in particular hexagonal, whose distance between two opposite faces is equal to the side of the square housing, and the end of the axis intended to enter this housing is milled according to two perpendicular parallel faces. the previous to engage in the housing, the milling determining an axial stop which limits the engagement of the axis in the housing of the device stop fall.

The axis may have a square section and include, towards its end remote from the tip, a split ring engaged in at least one groove to limit the engagement of the axis in the housing of the stop device fall.

The pressure means may be constituted by a pressure screw screwed into a thread integral with the bridge of the stirrup.

• Fig.1 est une vue schématique en perspective éclatée d'un certain nombre d'éléments d'un montage d'arbre tubulaire de volet roulant avec embout engagé sur un axe.
• Fig.2 est une vue en perspective d'un axe carré sur lequel est monté l'embout de volet roulant équipé du dispositif de blocage selon l'invention.
• Fig.3 est une vue en élévation à plus grande échelle du dispositif de blocage de Fig.2.
• Fig.4 est une coupe suivant la ligne IV-IV de Fig.3, à plus grande échelle.
• Fig.5 est une vue schématique en élévation de l'extrémité d'un axe à section transversale hexagonale régulière, engagé dans un logement carré d'un dispositif stop chute, et
• Fig.6 est une section suivant la ligne VI-VI de Fig.5.

The invention consists, apart from the arrangements described above, in a certain number of other arrangements which will be more explicitly discussed hereinafter with regard to exemplary embodiments described with reference to the appended drawings, but which are not in no way limiting. On these drawings:

• Fig.1 is a schematic exploded perspective view of a number of elements of a roller shutter tubular shaft assembly with a tip engaged on an axis.
• Fig.2 is a perspective view of a square axis on which is mounted the shutter fitting equipped with the locking device according to the invention.
• Fig.3 is an enlarged view in elevation of the device of blocking Fig.2 .
• Fig.4 is a section along line IV-IV of Fig.3 , on a larger scale.
• Fig.5 is a schematic view in elevation of the end of a regular hexagonal cross section axis, engaged in a square housing of a fall arrest device, and
• Fig.6 is a section along line VI-VI of Fig.5 .

Referring to Fig.1 drawings, we can see several elements of a roller shutter assembly comprising a tubular shaft 1 which serves for the winding and unwinding of a shutter not shown. The shutter has blades articulated together, the upper blade being attached to the shaft 1 by locks 2, attached to the shaft 1 between two rings 3. The shaft 1 can be rotated by an electric motor 4 comprising a rotor 5 with extension engaged in the shaft 1. The rotor 5 cooperates, at its inner end, with ribs projecting inside the shaft 1 to ensure the connection in rotation between the motor and the shaft 1.

On the opposite side to the motor 4, a tip 6 is provided to engage the shaft 1. This tip 6, as visible on Fig.2 , comprises a system of ribs 6a, 6b grooves, adapted to cooperate with conjugate forms provided on the inner surface of the shaft 1 to ensure the rotational connection between the nozzle 6 and the shaft 1.

The end piece 6 is traversed by an axis 7, one end of which, intended to be engaged in the tubular shaft 1, is equipped with a core 8 provided on its periphery with ribs / grooves adapted to cooperate with internal grooves / ribs of the shaft 1 for a connection in rotation.

The other end 7a of the axis 7 is provided to be received in a housing 9 forming a rotary bearing. In the example considered, the housing 9 is located in a rotating element 10 of a device 11 "stop fall" comprising a stator adapted to be fixed on a support member, in particular a cheek 12. This cheek 12 comprises a vertical leg 13 adapted to be engaged in a room with a vertical slide 14, which guards the rolling shutter apron. Connecting means, not shown, are provided for fixing the stator of the fall stop device 11 on the cheek 12. Alternatively, the support member could be constituted by a simple console or inclined bracket instead of a cheek 12, when the shutter is installed in a masonry reservation.

At its end remote from the fall stop 11, the shutter shaft 1 and the drive motor 4 are supported by another cheek 15 also provided with a tab 13, cooperating with a vertical slide chamber 14.

The axis 7 in the example under consideration is a square-section axis capable of supporting the resistive torque, when the stop device 11 comes into action to block the shaft 1 in rotation.

The relative position of the end piece 6 along the length of the axis 7 may vary according to the dimensions of the tubular shaft 1 and the installation conditions of the shutter. Thus, the portion of the shaft 7 protruding from the end piece 6 on the side of the fall stop 11 may be longer or shorter.

It is therefore necessary to ensure a possibility of adjusting the locking in translation of the tip 6 relative to the axis 7.

According to the invention, the blocking device B (see Fig.2 ) comprises a stirrup 16 which, preferably, has substantially the shape of an inverted U with two walls 16a, 16b spaced apart, generally parallel. These walls are connected by a bridge 16c. Each wall 16a, 16b has a window 17a, 17b crossed by the axis 7. The bridge 16c is provided with a pressure means M advantageously constituted by a set screw 18, screwed into a thread integral with the bridge 16c, and located between the walls 16a, 16b. The stirrup 16 is preferably made of metal, especially steel.

The windows 17a, 17b have, at each vertex of their lower edge, inclined corner portions 19a, 19b forming gussets, as shown in FIG. Fig.4 for part 19a. The axis 7 has notches 20 ( Fig.3 ) at least on its face intended to cooperate with the parts 19a, 19b, and generally on two opposite faces. The notches 20 are formed on the edges of the axis 7 in the form of indentations in hollow dihedron, and are distributed regularly along a pitch p, along the length, at the area used to adjust the positions of the endpiece. 6.

The parts 19a, 19b of the windows can be chamfered to be able to enter the notches 20. Indeed, the thickness e ( Fig.3 ) of the caliper wall may be greater than the width of a notch. By way of non-limiting example, the thickness e may be equal to or greater than 1.5 mm.

The pressure screw 18, when tightened, bears against the axis 7 and pulls the stirrup 16 so that the corner portions 19a, 19b of the windows 17a, 17b, located on the axis side 7 opposite the screw 18, bear against the axis 7. The latter is tightened and blocked between the screw 18 and the parts 19a, 19b. The stirrup 16 is thus stopped on the axis 7 and makes it possible to block the endpiece 6 in a direction that would tend to make the endpiece 6 leave the tubular shaft 1.

Advantageously, the distance D ( Fig.3 ) between the mean planes of the walls 16a, 16b is equal to an integer X of pitch p increased by a half step p / 2. So we can write: $$\mathrm{D}\mathrm{=}\mathrm{X}\mathrm{\cdot }\mathrm{p}\mathrm{+}\mathrm{p}\mathrm{/}\mathrm{2.}$$

Under these conditions, the parts 19a or 19b of a single edge enter a notch 20, while the other corner portions 19b or 19a of the other edge bear on the portion of the axis 7 between two notches.

The vertical clearance between the upper horizontal edge of a window 17a, 17b and the upper face of the axis 7 in the tightened state, as illustrated in FIG. Fig.4 is sufficient to clear the parts 19a or 19b of the notches 20 when the screw 18 is loosened.

With this arrangement, it is possible to adjust the position of the stirrup 16 relative to the axis 7, half-step p / 2 by half-step p / 2.

The entry of at least one edge 19a, 19b into a notch 20 ensures a positive stop of the stirrup 16 relative to the axis 7, and to improve the accuracy of the adjustment.

To limit the entry of the axis 7 into the housing 9 is provided, at a suitable distance from the end 7e of the end 7a of the axis 7, a split stop ring 21 anchored in at least one groove of the axis 7.

The implementation of the locking device according to the invention immediately results from the foregoing explanations.

After introduction of the core 8 and the axis 7 into the tubular shaft 1 to the desired position, the tip 6 is slid until it abuts against the adjacent end of the shaft 1. The stirrup 16 is then placed in axial abutment against the outer face of the end piece 6 and the stirrup is locked on the spindle 7 by screwing the screw 18 so that one of the edges 19a, 19b is engages in the appropriate notch 20 of the axis 7. The end 7a of the axis 7 is then introduced into the housing 9. Alternatively, one can implement the end 7a in the housing 9 before performing the adjustment described above so that the tip 6 is introduced into the tubular shaft 1 after introduction of the end 7a in the housing 9.

For greater ease of realization of the notching on the axis, it is possible to use an axis 107 ( Fig.5 and 6 ) of regular hexagonal section. The distance or dimension j between two opposite dishes 22a, 22b of the axis 107 ( Fig.6 ) is chosen equal to the square side of the housing 9.

To enable the end 107a of the axis 107 to enter the housing 9, the end of the hexagonal axis is milled on two opposite faces 22c, 22d perpendicular to the first faces 22a, 22b. It suffices to mill the triangular end of the hexagonal contour which protrudes from the contour of the square 9 as illustrated on Fig.6 .

This solution has the advantage of creating an axial abutment K along the hexagonal outline of the axis 107 at the projection created by the milling of the faces 22c, 22d, which limits the engagement of the axis. 107 in the housing 9 stop fall. The last 107th ( Fig.5 ) of the end 107a remains at a distance from the end of the housing 9.

This arrangement eliminates the presence of a stop ring 21 as in the case of Fig.2 .

Whatever the solution adopted, the invention makes it possible, by clamping, an effective axial blocking of the tip 6 on the axis 7. The clamping is maintained in time, especially when the stirrup 16 is metal , especially steel, because none of the parts involved is creep.

The proposed solution is simple and quick to implement.

Claims (9)

1. Assembly for mounting a roller blind comprising a tubular shaft (1) which is used to roll up and unroll the roller blind, a tip (6) being provided for connecting with shaft (1), the tip (6) being traversed by a rod (7, 107), one end of which, intended to be connected with the tubular shaft (1), is provided with a core (8) for rotatable connection with the shaft (1), the other end (7a) of the rod (7) being provided to be received in a recess (9) forming a rotatable bearing, the relative position of the tip (6) along the length of the rod (7) being variable according to the dimensions of the tubular shaft (1) and the conditions of installation of the roller blind, the mounting assembly comprising a device for locking in translation the tip (6) on the rod (7) and being characterised in that said locking device comprises a yoke (16) having two walls (16a, 16b) which are spaced apart and connected by a bridge (16c), each wall comprising a window (17a, 17b) through which the rod (7, 107) passes, the bridge (16c) having a pressure means (M) between the walls for tightly clamping the rod onto an edge (19a, 19b) of the windows, said rod (7) comprising notches (20) that are distributed in steps (p) over the length thereof, with which the edge (19a, 19b) of at least one window (17a, 17b) of the yoke (16) can cooperate so as to firmly lock the yoke on the rod and lock the tip (6) against the yoke (16).
2. Mounting assembly according to claim 1, characterised in that the distance (D) between the edges (19a, 19b) of the windows provided for cooperating with the notches (20) is equal to a whole number (X) of steps (p) of the notches of the rod incremented by a half-step, a single edge cooperating with a notch, the control thus able to be half-step by half-step.
3. Mounting assembly according to claim 1 or 2, characterised in that the yoke (16) is made of metal, in particular steel.
4. Mounting assembly according to any one of the preceding claims, characterised in that the yoke (16) substantially has the shape of an inverted U.
5. Mounting assembly according to any one of the preceding claims, characterised in that the transverse cross-section of the rod (7, 107) is a regular polygon, in particular a hexagon or square.
6. Mounting assembly according to any one of the preceding claims, characterised in that the end (7a, 107a) of the rod from the side of the yoke opposite the tip (6) is provided for cooperating with a square recess (9) of a fall-stop device (11).
7. Mounting assembly according to claim 6, characterised in that the rod (107) has a polygonal cross-section, in particular hexagonal, the distance (j) between the two opposite faces (22a, 22b) being equal to the side of the square recess (9), and the end of the rod intended to enter into said recess (9) is cut along two parallel faces (22c, 22d) perpendicular to the preceding ones for engaging in the recess, the cutting determining an axial abutment (K) which limits the engagement of the rod (107) in the recess of the fall-stop device.
8. Mounting assembly according to claim 6, characterised in that the rod (7) has a square cross-section and comprises towards its end remote from the tip, a split ring (21) connected in at least one groove for limiting the connection of the rod (7) in the recess of the fall-stop device.
9. Mounting assembly according to any one of the preceding claims, characterised in that the pressing means (M) is formed by a pressure screw (18) screwed into a tapping in the bridge (16c) of the yoke.

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