EP0974727B1 - Winding tube for roller shutter - Google Patents

Description

The present invention relates to a device for rolling shutter apron or similar, the apron being set in motion by a electric geared motor group. It aims more particularly a winding tube with geared motor, the tube comprising, of a part of the attachment means of the apron on the tube, and on the other hand a bore in which the group fits electric gear motor.

Conventionally, for motorizing a shutter shaft rolling, we just insert the geared motor inside of one end of the winding tube, the motor rotating the winding tube in the direction from the ascent or descent.

Document FR-A-2715432 shows an example of a winding tube equipped with a motor reducer.

• au niveau de la partie du palier de guidage, qui peut également servir de bague d'entraínement du système de gestion des fins de course d'arrêts haut et bas,
• au niveau de l'extrémité du corps du moteur, sur la bague d'entraínement qui transmet le couple de rotation dans un sens ou dans un autre.

The motor head is generally used as a fixed point and is secured by known means to the supports of the shutter box. The winding tube is connected to the motor via two precise points:

• at the level of the portion of the guide bearing, which can also serve as a drive ring of the management system of the top and bottom stops;
• at the end of the motor body, on the drive ring which transmits the torque in one direction or another.

The winding tubes known from the prior art have at one of their ends a ring interface which adapts, on the one hand to the bore of the tube, and on the other hand to the profile of the guide bearing. This guide ring is indexed on the guide bearing which has a key-shaped protrusion.

One of the main disadvantages lies particularly in the fact that it creates an extra thickness of material between the guide bearing of the geared motor unit electric and the winding tube.

Because of its existence, this ring imposes for issues of design and mechanical strength, a minimum thickness of room. This translates into an extra thickness of material at the level of guide bearing of the geared motor unit and by way of consequence, to an increase in the diameter of the tube winding of the rolling shutter apron.

Depending on the flap integration configurations rolling within buildings, whether in applications in new or renovation, installers and the designers of this type of installation have the concern constant to reduce the overall bulk of the box of the rolling shutter.

Indeed, for a given length of apron to be wound or unwind around a tube, and depending on the thickness of the apron blades, it is easy to see that the optimal size is obtained for a diameter minimum winding of the tube and the blades of the apron wrapped on it, the smallest possible.

The integration of an interface ring between the bearing guiding of the electric motor-reducer unit and the tube winding, goes against this objective.

A first solution to this problem is to use a cylindrical tube not ribbed and smooth. Disadvantage of this type of tube is that it has no surface latching to transmit the engine torque to the tube, the connection can not be made for example that by jamming. In addition, it is difficult to solidarize of these same tubes the elements outside the tube which allow the connection to the apron of the shutter (ring, automatic lock etc ...).

Moreover, the incorporation of the detection means necessary for the operation of the limit switches within a smooth tube is delicate. Indeed, the link between the guide bearing and the tube forces to achieve the machining of a notch at the end of the dimension tube equivalent to the raised key-shaped area. In addition, the connection between the drive ring and the tube must be able to transmit the torque, this being done using screws or rivets also requiring prior machining.

The present invention therefore aims to overcome the disadvantages of the known devices of the prior art, proposing the combination of a winding tube and a geared motor which does not require the use of an interface ring, which guarantees the correct functioning of the end-of-race systems, and allows the attachment of ancillary components of the tube winding, while ensuring a winding diameter final as small as possible.

For this purpose, the winding tube with motor reducer for shutter apron according to the invention is such that the tube comprises a succession of first and second grooves alternating according to the circumference of the tube, the bottom walls of the second flutes being in contact of a guide bearing of a geared motor, the said grooves furthermore having at least one reservation of material allowing cooperation with a relief zone coming from the guide bearing of the geared motor.

• la figure 1 est une vue en perspective illustrant schématiquement le montage d'un moto-réducteur électrique au sein d'un tube d'enroulement pour tablier de volet roulant ;
• la figure 2 est une vue en coupe et en élévation latérale d'un montage selon l'art antérieur ;
• la figure 3 est une vue en coupe et en élévation latérale d'un tube d'enroulement pour tablier de volet roulant selon l'invention ;
• la figure 4 est une vue en coupe et en élévation latérale d'un tube d'enroulement selon un premier mode de réalisation ;
• la figure 5 est une vue en coupe et en élévation latérale d'un tube d'enroulement selon un deuxième mode de réalisation ;
• la figure 6 est une vue en coupe et en élévation plane d'un tube d'enroulement selon l'invention.

Other features and advantages of the present invention will emerge from the description given below, with reference to the accompanying drawings which illustrate an embodiment having no limiting character. In the figures:

• Figure 1 is a perspective view schematically illustrating the mounting of an electric gear motor in a winding tube for rolling shutter apron;
• Figure 2 is a sectional and side elevational view of a mounting according to the prior art;
• Figure 3 is a sectional and side elevational view of a rolling tube for shutter apron according to the invention;
• Figure 4 is a sectional side elevational view of a winding tube according to a first embodiment;
• Figure 5 is a sectional side elevational view of a winding tube according to a second embodiment;
• Figure 6 is a sectional and planar elevational view of a winding tube according to the invention.

According to a preferred embodiment of the tube winding 1 for shutter apron or similar according to the invention, it is developed according to a first embodiment, from a strip metal thickness including between 0.5 and 1 mm and whose width corresponds substantially to perimeter of the tube, the latter being measured at its average diameter.

FIG. 1 diagrammatically shows a tube winding 1 in which it comes to introduce a geared motor electric device with a body, provided with one of its ends of a tube 15 drive ring winding 1, and at its other end, a bearing of guide 9 which cooperates with the tube 1.

Two of the parallel side walls 2, 3 of the strip will be connected to one another at a system level stapling 4 formed by lips 5 engaged one in the other, after having undergone a plurality of manufacturing and production (drilling, stamping, cutting, forming ...) to conform a tube.

These intermediate operations which are carried out during of the transformation of the shaped sheet into a plate to the strip shaped tube, consist essentially to develop machining such as holes 6 of various profiles that allow the hanging elements attached to the tube (latching bolt of the apron to the winding tube), as well as operations stampings that generate hollow shapes and relief on the cross section of the tube, the set of these operations being commonly called profiling.

Thus, it is realized along the average perimeter of the tube 1, a plurality of first and second flutes 7, 8 evenly distributed around the circumference so alternating between the first and second flutes. The depth of the grooves 8 is conditioned by the outside diameter of the guide bearing 9 of the geared motor unit electrical power (see Figure 3) and the respective width of the grooves 8 is sufficient to ensure a bearing surface between the guide bearing 9 and the tube 1 which allows the transmission of the torque of rotation transmitted by the electric gear motor, also well on the ascent and descent of the shutter apron rolling. According to a first embodiment, the tube 1 comprises an alternating succession of first three and second grooves 7, 8 disposed substantially at 120 ° one of the other (refer to Figure 4). So, for example, for a standard tube 1 with an outer diameter of 54 mm, the inside diameter measured at the bottom of the grooves 8 is 47.5 mm, the opening of these grooves 8 measured between the two side walls 10, 11 and the center of the tube 1 corresponds substantially to an angle of 40 °.

According to a second embodiment, the tube 1 comprises an alternating succession of at least three first and second grooves 7, 8, preferentially to the number of four, arranged at approximately 90 ° to one another ( refer to Figure 5). So, for a diameter tube 54 mm, the inside diameter measured at the bottom of grooves 8 is 47.5 mm, the opening of the grooves 8 measured between the two side walls 10, 11 and the center of the tube 1 corresponds substantially to an angle of 30 °.

Whatever the embodiment of the tube 1 obtained by profiling of a metal strip, at least one of the first and second grooves 7 and / or 8 has a reservation 12 projecting to receive a zone in relief 13 forming key, made on the bearing of guidance 9 of the electric geared motor unit.

Depending on the type of engine to be integrated into inside the tube 1, it is planned to have different reservation profiles 12 (not shown on the figures) on each of the first and second flutes 7 and / or 8. Thus, depending on the origin of the geared motor group, the user angularly positions the area in relief 13 formed on the guide bearing 9 in the flute 7 and / or 8 who owns reservation 12 of adapted profile.

According to a second embodiment of the tube 1 winding for shutter apron or the like according to the invention, it is produced from a plastic or metal extrusion technique through a sector whose profile corresponds to the cross section of the tube.

Similarly, the cross section of the tube 1 has a plurality of first and second grooves 7, 8 evenly distributed on the circumference and of which at least one of the grooves 7 and / or 8 has a reservation 12 whose profile is adapted to the raised area 13 of the guide bearing 9 of the electric geared motor group.

The zones 14 of the tube 1 between each groove 8 being away from the body of the engine, these generate space free way which allows the passage of the fixing screws or hooks inside the holes and lights 6 practiced along the tube 1.

If we use a method of obtaining the tube from the profiling a strip, it is necessary to connect between them two lateral walls 2, 3 parallel to the strip.

This operation is carried out by training, in particular by stamping, on each of these two walls side 2, 3 staple lips 5 which come during of the final operation of formation of the tube, to be superimposed against each other before being definitively rendered in solidarity, in particular by a crimping operation or point-to-point welding.

The present invention as described above offers multiple benefits because it allows you to mount a electric geared motor group inside a tube without the use of an interface ring, and the grooves can also connect ancillary elements of the shutter system, in particular a system of compensator for direct pull maneuvering, a bit for strap operation, or a device for maneuver by winch crank or cord.

It remains understood that the present invention is not not limited to the exemplary embodiments described and above, but includes all variants falling within the scope defined by the claims.

Claims (6)

1. Winding tube (1) with a motor reduction unit for the apron of a roller blind, the tube comprising a succession of alternate first and second corrugations (7, 8) round the circumference of the tube, the bottom walls of the second corrugations being in contact with a guide bearing (9) of the motor reduction unit, said corrugations (7, 8) also possessing at least one outward notch (12) which enables it to cooperate with a projecting zone (13) integral with the guide bearing (9) of the motor reduction unit.
2. Winding tube (1) with a motor reduction unit for the apron of a roller blind according to claim 1, characterised in that the depth of the corrugations (8) is dependent on the external diameter of the guide bearing (9) of the electric motor reduction unit assembly, and the respective width of the corrugations (8) is sufficient to guarantee a support surface between the guide bearing (9) and the tube (1) which allows transmission of the torque transmitted by the electric motor reduction unit during both the ascent and the descent of the apron of the roller blind.
3. Winding tube (1) with a motor reduction unit for the apron of a roller blind according to either of claims 1 or 2, characterised in that the tube (1) comprises an alternate succession of three first and second corrugations (7, 8) disposed substantially at 120° from one another.
4. Winding tube (1) with a motor reduction unit for the apron of a roller blind according to either of claims 1 or 2, characterised in that the tube (1) comprises an alternate succession of at least three first and second corrugations (7, 8), preferably four, disposed substantially at 90° to one another.
5. Winding tube (1) with a motor reduction unit for the apron of a roller blind according to any of the preceding claims, characterised in that various outward notches (12) may be disposed on each of the first and second corrugations (7, 8).
6. Winding tube (1) with a motor reduction unit for the apron of a roller blind according to any of the preceding claims, characterised in that it comprises zones (14) positioned between each corrugation (8), these zones (14) being spaced from the motor body to allow the passage of fixing screws or hooks inside holes or apertures (6) made along the tube (1).

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