FR2777941A1 - MANUAL DRIVE DEVICE FOR ROLLING SHUTTER - Google Patents

Abstract

The invention relates to a manual drive device for a roller shutter provided with a reduction mechanism (10) of the movement of a pulley (9) provided capable of being driven by a traction member, such as a strap, cord. , chain or the like for controlling in rotation a winding shaft (3) of the shutter curtain, this winding shaft (3) being kept in rotation, at its ends (5), by bearings (6 ) associated with supporting cheeks (7). According to the invention, the bearing (6) associated with the support cheek (7) on the side of the pulley (9) is defined by a tubular end piece (11) on which is mounted in rotation the corresponding end (5) of the 'winding shaft (3), this tubular end piece (11) defining, internally, a housing (12) for receiving said reduction mechanism (10).

Description

The invention relates to a manual drive device for a shutter.

  roller or the like comprising a mechanism for reducing the movement of a pulley of the nested epicycloidal gear type, said pulley being adapted to be driven by a traction member, such as a strap, cord, chain or the like, for controlling in rotation of a winding shaft of the roller shutter deck, this shaft being kept in rotation, at its ends, by bearings associated with supporting cheeks. The present invention will find its application in the field of roller shutters and relates, more particularly, to a

  manual drive device for such rolling shutters.

  It is known, of course, several manual drive devices for roller shutters or the like comprising a mechanism for reducing the movement of a pulley otherwise provided adapted to be driven by a traction member, such as a strap, a cord, chain or the like, for the rotary control of a winding shaft of the deck of the

roller shutter.

  In this regard, it should be observed that such a winding shaft is kept in rotation, at its ends, by means of bearings usually associated with supporting cheeks taking position inside a box. intended to receive all of this drive mechanism including the apron once folded around the aforementioned winding shaft. It is obvious, of course, that for reasons of size and weight of such a roller shutter curtain, it is necessary frequently and unless resorting to complex assistance means, to multiply the action carried out on the pulley in relation to the winding shaft. Also, use is made of reduction mechanisms which are either interposed between said pulley and the corresponding end of the winding shaft, or disposed at the opposite end of this winding shaft, this with respect to this pulley. Such an embodiment is notably

  described in document FR-A-2,349,722.

  In fact, it is undeniable that this type of arrangement of the reduction mechanism leads to a roller shutter box of greater width. However, this can pose major problems of implantation of said box at an opening corresponding to a door, window or the like, of predefined dimension at the level of a construction. Thus, in certain designs, this roller shutter box, including the sleeping frame of a door, window or the like, must take position in the doorway itself so that said box cannot have a width greater than that of said sleeping frame . If, under such conditions, it is necessary to reduce the length of the winding shaft due to a bulky reduction mechanism, this necessarily results in a shutter curtain of smaller width, therefore , a clear window,

  level of a window for example, more reduced.

  Similar constraints are encountered in the field of renovation o an assembly composed of a roller shutter box surmounting a renovation frame is brought to take a position between the uprights and crosspieces of a pre-existing frame. Consequently, here again it is necessary to avoid the presence of any mechanism which reduces the size of the winding shaft and therefore of the deck of said rolling shutter. In such a situation, this is all the more important since there is already substantial loss of glazing clear through the presence of this roller shutter box but also of the frame.

  renovation from the pre-existing sleeping frame.

  On this, it will also be observed that it is also known, in particular through document EP-0.163.927, a reduction mechanism taking position in the thickness of the pulley

  drive, this in the context of an application to blinds.

  In fact, the pulley here defines a crown, fitted internally, with a toothing in engagement with one or more satellites mounted in rotation on a satellite carrier which is also made integral with the winding shaft of the blind. The satellite has, here, a double toothing, one in engagement with the crown of the pulley, while the other cooperates with the toothing of a

fixed planetary in rotation.

  As is apparent from this prior document, this reduction mechanism proves to be particularly complex, not to mention that it uses small toothed wheels so that it results in general fragility and a more difficult design. Consequently, the object of the present invention is to propose an advantageous solution in this field of manual drive devices for roller shutters provided with a mechanism for reducing the movement of a pulley provided capable of being driven by a traction member, such as a strap, cord, chain or the like, for controlling the rotation of a winding shaft of the roller shutter deck, this winding shaft being kept in rotation at its ends by bearings associated with support cheeks, characterized in that at least the bearing associated with the support cheek on the side of the pulley is defined by a tubular end-piece on which the corresponding end of the winding shaft is rotatably mounted, this tubular end-piece defining, internally, a housing for the

  receipt of said reduction mechanism.

  According to a preferred embodiment of the invention, this reduction mechanism is of the nested epicycloidal gear type. Thus, it will be observed that by positioning itself, in a way, in the internal space delimited by the winding shaft of the deck, the reduction mechanism does not generate any excess length at the level of the casing of this rolling shutter. Consequently, the present invention responds favorably to the

problem.

  Other objects and advantages of the present invention

  will appear during the description which follows relating to

  to an embodiment which is given only by way of example

indicative and not limiting.

  Understanding this description will be facilitated by

  referring to the attached drawing in which: - Figure 1 is a schematic representation of a roller shutter box receiving, internally, the winding shaft of an apron whose rotation drive is provided by the intermediate of a pulley on which is able to act a user using an appropriate traction member; - Figure 2 is a schematic representation in section of the manual drive device according to the invention, adapted to

  a roller shutter as shown in Figure 1.

  As visible in the attached drawings, the present invention relates to the field of roller shutters provided with a

  manual type drive device.

  In fact, there has been shown in FIG. I such a rolling shutter i comprising, housed inside a box 2, a winding shaft 3, notably visible in FIG. 2 around which an apron is caused to wind up. 4. This winding shaft 3 is held, at its ends 5, by bearings 6 associated with support cheeks 7 and allowing its free rotation under the impulse of a manual drive device 8 also taking position

inside this box 2.

  About this drive device 8, it is defined, essentially, by a pulley 9 provided capable of being driven by any traction member, such as a strap, cord, chain or the like, falling out of the box 2 , so

accessible to a user.

  In fact, this pulley 9 ensures the rotation control of the winding shaft 3, through a mechanism

reduction 10.

  In this regard and according to the invention, at least the bearing 6 associated with the support cheek 7, on the side of the pulley 9, is defined by a tubular end piece 11 on which the corresponding end 5 of the shaft is rotatably mounted winding 3, this tubular end piece 11 and, where appropriate, in part said end 5 of this winding shaft 3 defining, internally, a housing 12 for the

  receipt of said reduction mechanism 10.

  In the end, this tubular end piece 11 associated with the support cheek 7 defines the bearing 6 with which comes to cooperate, by being fitted on the latter, a sleeve 13 equipping, advantageously,

  this end 5 of the winding shaft 3.

  According to a preferred embodiment of the invention, this reduction mechanism 10 is of the planetary gear type

nested.

  More specifically, the pulley 9, disposed outside the support cheek 7, this with respect to the winding shaft 3, comprises, at its center, a shaft 14 which is integral with it in rotation and mounted so as to rotate at a bearing 15 associated with said support cheek 7 while crossing the latter so as to extend, axially, in the housing 12. At the height of the latter, this shaft 14 comprises, according to a first embodiment, a satellite carrier 16 which it is integral in rotation and on which are mounted, coaxially, one or more satellite wheels 17. More specifically, this or these satellite wheels 17 are mounted rotating on an axis 18 maintained, at

  through the satellite carrier 16, parallel to the shaft 14.

  In fact, this or these satellite wheels 17 are meshed, through at least one toothing 19, on the one hand, on a first toothed ring 20 formed at the level of the internal wall 21 of the tubular end piece 11 and , on the other hand, on a second toothed ring 22 associated with the winding shaft 3. Preferably, this second toothed ring 22 is formed at the level of the internal wall 23 corresponding to a bore 24 at the sleeve 13

  associated with the end 5 of said winding shaft 3.

  It should be observed that in the case of satellite wheels 17 having only a single toothing 19 which, as illustrated in FIG. 2, meshes, simultaneously, on each of the toothed rings 20, 22 of the same diameter primitive, it will be necessary, to guarantee proper functioning of this reduction mechanism 10, to adjust accordingly the number of teeth of a crown 20 relative to the other 22. Thus, the number of their teeth will be chosen slightly different to avoid blockage

of the mechanism.

  In fact, such a design makes it possible, through an adapted correction of the different teeth, to advantageously ensure the balancing of the tangential forces on the gears between, on the one hand, the satellite wheel or wheels 17 and the ring gear 22 of the winding shaft 3 and, on the other hand, this or these same planet wheels 17 and the ring gear 20 of the tubular end piece 11, from which ultimately results the irreversibility of this mechanism reduction gear 10. This makes it possible to get rid of any braking device acting on the winding shaft 3 or even on any

traction.

  However, according to another embodiment, such satellite wheels 17 can also be provided with a double toothing of different pitch diameters which mesh, respectively, on the fixed toothed crown 20 and on the toothed crown 22

  associated with the winding shaft 3.

  As is apparent from the above description, the tree 14

  of the pulley 9 directly attacks the satellite wheel or wheels 17 through a satellite carrier 16 which is associated with it. However, one can imagine, in particular for obtaining a higher gear ratio, to equip this shaft 14 with a sun wheel coming to attack, through an appropriate toothing, the satellite wheel or wheels 17 rotatably mounted on a satellite carrier provided capable of rotating, coaxially, around the shaft 14. This or these satellite wheels 17 again come to mesh simultaneously, on toothed rings 20, 22 associated, respectively, with the end piece tubular 11 and to the winding shaft

3 through the sleeve 13.

  Of course, such a reduction mechanism 10 can also borrow other embodiments than those of the nested epicycloidal gear type. Thus, one can imagine mounted on the shaft 14, in its part introduced into the housing 12, a solar unit meshing on one or more satellite wheels 17 of a satellite carrier fixedly mounted in the housing 12, either by relative to the tubular end piece 11, that is to say with respect to the winding shaft 3. In the first case, the planet wheel or wheels 17 come to mesh on a ring gear 22 associated with the winding shaft 3 , while if this satellite carrier is mounted integral in rotation at the level of the winding shaft 3, this or these satellite wheels 17 cooperate exclusively on a ring gear 20 associated with one end piece

tubular 11.

  It appears from the above description that this mechanism of

  reduction ratio 10, through the features of the present invention, does not constitute any additional space requirement on either side of the winding shaft 3. In fact, the implantation according to the invention of this reduction mechanism 10 allows , finally, to adjust with greater precision the desired gear ratio. Indeed, it should be noted that if the mechanisms described above usually lead to a relatively large reduction ratio, this can be adjusted, to obtain a lower ratio of the order of 2 to 3 , by the implantation, in the thickness of the pulley 9 of a mechanism 25 (illustrated diagrammatically in FIG. 2) defined capable of amplifying the movement exerted by the user on this pulley 9. By way of example , such a mechanism 25 can again be defined by a solar 26 fixedly mounted on the shaft 14 and coming to mesh on one or more satellite wheels 27 engaged with a ring gear 28 defined by

said pulley 9.

  Although the invention has been described in connection with an embodiment, it is understood that it is in no way limited thereto and that it is possible to make various modifications to it in terms of shapes, materials and combinations of these various elements without it

  move away from the framework and the spirit of the invention.

Claims (9)

Claims   1. Manual drive device for rolling shutter (1) or the like comprising a mechanism for reducing the movement (10) of the movement of a pulley (9) provided capable of being driven by a traction member, such as a strap, cord. , chain or the like, for controlling the rotation of a winding shaft (3) of the deck (4) of the rolling shutter (1), this winding shaft (1) being kept in rotation at its ends (5 ), by bearings (6) associated with support cheeks (7), characterized in that at least the bearing (6) associated with the support cheek (7) on the side of the pulley (9) is defined by a tubular end piece (11) on which the corresponding end (5) of the winding shaft (3) is rotatably mounted, this tubular end piece (11) defining, internally, a housing (12) for receiving said mechanism reduction gear (10).   2. Manual drive device according to claim 1, characterized in that the housing (12) for receiving the reduction mechanism (10) is further defined, in part,   by said end (5) of the winding shaft (3).   3. Manual drive device according to any one of   Claims 1 and 2, characterized in that the end (5)   of the winding shaft (3) is provided with a sleeve (13) fitted on the tubular end piece (11) associated with the support cheek (7) and defining the bearing (6).   4. Manual drive device according to any one of   previous claims, characterized in that the   gear reduction mechanism (10) is of the nested epicycloidal gear type. 5. Manual drive device according to claim 4, characterized in that the pulley (6) has, in its center, a shaft (14) which is integral with it in rotation and mounted for rotation at a level (15 ) associated with said support cheek (7) while crossing the latter so as to extend axially in the housing (12), up to the latter this shaft (14) comprising a satellite carrier (16) which is integral with it rotation and on which are mounted, coaxially, one or more satellite wheels (17) meshing through at least one toothing (19), on the one hand, on a first toothed ring (20) formed at the internal wall (21) of the tubular end piece (11) and, on the other hand, on a second toothed ring (22) associated with the shaft winding (3).   6. Manual drive device according to claim 5, characterized in that the satellite wheel or wheels (17) mesh with the same toothing (19) on each of the toothed rings (20, 22) d '' an identical pitch diameter, the different teeth being, moreover, corrected in order to ensure the balancing of the tangential forces on the gears, between, on the one hand, the satellite wheel (s) (17) and the ring gear ( 22) of the winding shaft (3) and, on the other hand, this or these satellite wheels (17) and the ring gear (20) of the tubular end piece (11) and, therefore, the irreversibility of said mechanism reduction (10).   7. Manual drive device according to claim 5 or 6, characterized in that the second toothed ring (22) is formed at the level of the internal wall (23) corresponding to a bore (24) at the sleeve (13 ) associated with the end (5) of said winding shaft (3).   8. Manual drive device according to claim 5, characterized in that the satellite wheel or wheels (17) are provided with a double toothing of different pitch diameters which mesh, respectively, on the ring gear (20) fixed and on the ring gear (22) associated with the winding shaft (3). 9. Manual drive device according to any one of   previous claims characterized in that the pulley   (9) has, in its thickness, a mechanism (25) defined capable of amplifying the movement exerted by the user on this pulley (9) by   through the traction unit.