WO2010143104A2

WO2010143104A2 - Roller blind mounting assembly, including a tubular shaft

Info

Publication number: WO2010143104A2
Application number: PCT/IB2010/052477
Authority: WO
Inventors: Mikaël PELERIN; Jean-Marie Allemand
Original assignee: Zurfluh Feller
Priority date: 2009-06-08
Filing date: 2010-06-03
Publication date: 2010-12-16
Also published as: EP2440733A2; FR2946385A1; EP2440733B1; ES2403507T3; WO2010143104A3

Abstract

The invention relates to a roller blind mounting assembly, including a tubular shaft used to roll and unroll the blind and a tip (6) for insertion into the shaft, and through which a rod (7) passes, one end of which is provided with a core (8) for the rotatable linking with the shaft, the other end (7a) of the rod being received in a recess forming a rotatable bearing, the relative position of the tip (6) along the length of the rod (7) being variable, said assembly comprising a device for translatably locking the tip (6) onto the rod (7), including 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) passes, the bridge (16c) having a pressure means (M) for tightly clamping the rod on an edge (19a, 19b) of the windows, the rod (7) comprising notches (20) that are distributed over the length thereof, with which the edge (19a, 19b) of at least one window (17a, 17b) of the yoke (16) are engageable so as to firmly stop the yoke on the rod and lock the tip (6) against the yoke (16).

Description

SHIFTING ASSEMBLY ASSEMBLY COMPRISING A TUBULAR SHAFT.

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.

Patent application FR 2 877 689 shows a mounting assembly of the kind defined above.

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.

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

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 tip equipped with the locking device according to the invention.

Fig. 3 is a view in elevation on a larger scale of the device of blocking of Fig.2.

Fig.4 is a section along line IV-IV of Fig.3, on a larger scale.

Fig.5 is a schematic elevational view of the end of a regular hexagonal cross section axis, engaged in a square housing of a fall stop device, and

Fig.6 is a section along the line VI-VI of Fig.5.

Referring to Fig.1 of the drawings, one 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 in Fig.2, comprises a system of ribs 6a, grooves 6b, adapted to cooperate with conjugate shapes provided on the inner surface of the shaft 1 to ensure the rotational connection between the end piece 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 considered is a square section axis, capable of supporting the resistive torque, when the device 11 stop falls into action to lock in rotation the shaft 1. The relative position of the endpiece 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 locking 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, 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 angle portions 19a, 19b forming gussets, as shown in Fig.4 for the 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. In fact, the thickness e (Fig.3) of the wall of the stirrup can 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 one half not p / 2. So we can write:

D = X - p + p / 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 shown in Fig.4, is sufficient to allow to disengage 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 per 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 inserted into the tubular shaft 1 after introduction of the end 7a in the housing 9. For greater ease of realization of the notch on the axis, it can be provided to use an axis 107 (Fig.5 and 6) of regular hexagonal section.

The distance or dimension j between two opposed plates 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 in FIG. 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 end 107e (FIG. 5) of the end 107a remains at a distance from the end of the housing 9.

This arrangement makes it possible to overcome the presence of a stop ring 21 as in the case of FIG.

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 fast implementation.

Claims

1. Roller shutter mounting assembly comprising a tubular shaft (1) which serves for winding and unwinding of a roller shutter, a nozzle (6) being provided for engaging in the shaft (1), end piece (6) traversed by an axis (7, 107) whose end, intended to be engaged in the tubular shaft (1), is equipped with a core (8) for a connection in rotation with the shaft (1), the other end (7a) of the axis (7) being adapted to be received in a housing (9) forming a rotary bearing, the relative position of the end piece (6) along the length of the axis (7) which can vary according to the dimensions of the tubular shaft (1) and the conditions of installation of the shutter, characterized in that it comprises a locking device in translation of the tip (6) on the axis (7, 107), which comprises a stirrup (16) having two spaced walls (16a, 16b) connected by a bridge (16c), each wall having a window (17a, 17b) traversed by the axis (7, 107) , the bridge (16c) being provided with a pressure means (M) situated between the walls for exerting a tightening of the axis on an edge (19a, 19b) of the windows, said axis (7) comprising notches (20) distributed according to a step (p) along the length, with which the edge (19a, 19b) of at least one window (17a, 17b) of the stirrup (16) can cooperate for a positive stop of the stirrup on the axis and to lock the tip (6) against the stirrup (16).

2. Mounting assembly according to claim 1, characterized in that the distance (D) between the edges (19a, 19b) of the windows provided to cooperate with the notches (20) is equal to an integer number (X) of pitch ( p) notches of the axis, increased by a half-step, a single edge cooperating with a notch, the adjustment can thus be performed half-step by half-step.

3. Mounting assembly according to claim 1 or 2, characterized in that the stirrup (16) is metallic, in particular steel.

4. Mounting assembly according to any one of the preceding claims, characterized in that the stirrup (16) has substantially the shape of an inverted U.

5. Mounting assembly according to any one of the preceding claims, characterized in that the cross section of the axis (7, 107) is regular polygonal, in particular hexagonal or square.

6. Mounting assembly according to any one of the preceding claims, characterized in that the end (7a, 107a) of the axis located on the side of the stirrup opposite the end piece (6) is provided to cooperate with a square housing (9) of a fall arrest device (11).

7. Mounting assembly according to claim 6, characterized in that the axis (107) has a polygonal section, in particular hexagonal, whose distance (j) between two opposite faces (22a, 22b) is equal to the side of the housing square (9), and the end of the axis intended to enter this housing (9) is milled according to two parallel faces (22c, 22d) perpendicular to the preceding to engage in the housing, the milling determining an axial stop (K) which limits the engagement of the axis (107) in the housing of the stop device falls.

8. Mounting assembly according to claim 6, characterized in that the axis (7) has a square section and comprises, towards its end remote from the endpiece, a split ring (21) engaged in at least one groove to limit the engagement of the axis (7) in the housing of the stop device drops.

9. Mounting assembly according to any one of the preceding claims, characterized in that the pressure means (M) is constituted by a screw (18) screwed into a thread integral with the bridge (16c) of the caliper.