FR2508530A1 - Opening-closing drive for door - incorporates friction clutch which prevents motor burning out when door jams - Google Patents

Abstract

The opening and closing drive for a door comprises a motor, the output shaft (11) of which meshes with a cog (17) attached to a second shaft (12). Rotational movement of the output shaft causes the second shaft (12) to turn, moving an arm (32) attached to the door through an arc to open and close the door. A friction clutch (15) is incorporated into the second shaft (12) to prevent the motor burning out, if an obstacle is encountered by the door.

Description

'System intended for closing and / or opening a leaf, in particular a door or gate leaf ".

 The present invention relates to a system intended for closing and / or opening a leaf, in particular a door or gate leaf.

 Systems of this kind which are currently known generally include a mechanical or electronic torque limiting device. Some are also remotely controllable. Most of the known systems are heavy, complex, and consequently expensive.

One is known, however, which, although being simple, has drawbacks. In fact, in this known closure system, all the means making it possible to transmit the rotational movement of the drive motor to the leaf are carried by the output shaft of this motor, so that the bearings which carry this shaft must support all the forces required to close or open the leaf.

 It is therefore necessary to size the drive motor accordingly.

 The object of the present invention is to remedy the drawbacks of the existing technique and consequently relates to a system intended for closing and / or opening a leaf of simple, light and inexpensive structure, while retaining large poses. mechanical sensitivities.

 The system for closing and / or opening a leaf, in particular a door leaf or gate leaf according to the present invention comprises a drive means such as a reduction motor whose output shaft is connected in rotation to said leaf by means of a torque limiting friction device, this torque limiting friction device making it possible in particular to protect the system and in particular the drive means if for example an obstacle prevents opening or closing the leaf.

 According to the present invention, the system comprises a secondary shaft on which the friction drive device is mounted and which makes it possible to transmit the rotational movement of the output shaft of the drive means to the leaf via the device friction. In this way, a large part of the forces necessary for the rotation of the leaf are transferred to the secondary shaft which can be carried by a support annexed to the drive means, the output shaft of the drive means supporting only the forces due to the transmission of its rotational movement to the secondary shaft.

 According to the present invention, the system preferably comprises a gear link between the output shaft of the drive motor and said secondary shaft.

 According to the present invention, the friction device preferably comprises a wheel mounted free in rotation and connected in rotation to the output shaft of said drive means as well as means integral in rotation with said secondary shaft and making it possible to link said rotation in rotation wheel to the secondary shaft by friction, this secondary shaft being linked in rotation to said leaf.

 In a particularly simple variant, the friction device comprises, successively mounted on said secondary shaft, a first ring forming an axial stop, a pinion mounted freely on said secondary shaft and connected in rotation to the output shaft of said means of drive in particular by a gear link, a second ring, an axially deformable elastic element for exerting pressure on said second ring in the direction of said first ring in order to pinch said pinion and a means for maintaining the pressure of the elastic element , at least one of said rings being connected in rotation to said secondary shaft in order to link said pinion in rotation to this secondary shaft by friction of this pinion on at least one of the rings.

 Said axially deformable elastic element may be formed by elastic washers, one or more rubber rings, or any equivalent elastic element.

 According to the present invention, said holding means preferably comprises a radial pin passing through said secondary shaft on either side and sleeves for adjusting the pressure or the axial deformation of the elastic element mounted on the projecting ends of the pin on either side of said secondary shaft.

 Said adjustment sleeves can be of circular section and have a diameter suitable for adjusting the pressure of the desired elastic element. In another variant, said sockets can be provided with a polygonal section and be mounted on said pin so as to be able to rotate around an off-center axis so that the distance between their axis of rotation and each of their faces varies. By rotation of these pins of polygonal section, one can modify the adjustment of the axial deformation of the elastic element.

 The system according to the present invention preferably comprises at least one means of rotational connection between said secondary shaft and said leaf. This rotary connection means can be formed by two rods hinged together and one of which is articulated on said leaf and the other is linked in rotation to said secondary shaft.

 According to the present invention, said links can be made so as to form a means for locking the leaf in the closed position by stop. Indeed, according to the present invention, when said leaf is in the closed position, said links are preferably aligned or go beyond their alignment, a stop being provided to limit the movement of the rods when the leaf is in closed position. In a variant, at least one of the links comprises a stop in rotation for the other link.

 The system according to the present invention can be mounted in a housing, at least one of the ends of said secondary shaft extending outside this housing for its connection in rotation to said leaf and a sealed connection being provided between the housing and secondary shaft to protect the system from weather and dust.

 With a view to cutting off the supply to said drive means when said leaf reaches its open or closed position, the system preferably comprises means detecting the angular position of said secondary shaft.

The present invention will be better understood from the study of a particular system intended for closing and / or opening a leaf described by way of nonlimiting example and illustrated by the drawing in which
- Figure I shows a top view of the wing of a portal provided with the system according to the present invention
- Figure 2 shown in vertical section the system according to the present invention
and FIG. 3 represents section III-III of a part of the system shown in FIG. 2.

There is in Figure 1 a leaf I mounted on a pole
vertical 2 of rectangular section through hinge
res 3, the leaf i being in the closed position.

On the inside face of the post 2 is fixed a system
closing and opening leaf 1, this system being identified
generally by reference 4.

More particularly in Figure 2, we see that the
closing and opening system 4 includes a support 5 present
as a U-shaped profile comprising a core 6 on the side of the post 2,
an upper wing 7 and a lower wing 8, the wings 7 and 8
being horizontal and extending forward.

 The support 5 is arranged inside a parallelepipedal housing 9 so that two of its opposite faces are in contact with the external faces of the axils 7 and 8 of the support 5, the housing 9 comprising, on the side opposite to the 're 6 of the support 5, a door not visible in the figures.

 The system 4 comprises a drive means formed by a gear motor 10 whose output shaft 11 is vertical. This motor-reducer 10 is fixed to the train 6 of the support 5 by any known means, between its wings 7 and 8.

 The system 4 further comprises a secondary secondary shaft 12 which is carried by the support 5 by means of bearings 13 and 14 which are mounted respectively in the orifices of the wings 7 and 8 of the support 5, the ends of the secondary shaft 10 extending beyond the bearings 13 and 14 outside the housing 9.

 The secondary shaft 12 carries between the elders 7 and 8 of the support 5 a friction drive device generally identified by the reference 15.

 The friction drive device 15 comprises, successively mounted in a stacked fashion on the shaft 12, a first ring 16 preferably made of plastic, a pinion 17 preferably metallic, a second ring 18 preferably made of plastic, an element elastic formed in the example represented by a rubber ring 19, a washer 20 and a holding means generally identified by the reference 21, the elastic element 19 being compressed axially so that the pinion 17 is pinched between the rings 16 and 18.

 The ring 16 is fixed to the secondary shaft 12 by means of a pin 22.

 The pinion 17 is mounted freely on the shaft 12 and is engaged with a pinion 23 mounted on the end of the output shaft 11 of the motor-reducer 10.

 The ring 18 is linked in rotation to the shaft 12 by means of a keying 24 which allows an axial displacement of this ring along the secondary shaft.

 The elastic ring 19 and the washer 20 are freely mounted on the secondary shaft 12.

 The holding means 21 comprises a pin 25, for example a split pin, which passes radially through the secondary shaft 12 so that its ends project on either side of the secondary shaft 12, this pin 25 being maintained at the secondary shaft 12.

 On the protruding ends of the pin 25 are arranged respectively two sockets 26 and 27. The sockets 26 and 27 have holes 28 and 29 respectively and are mounted such that the protruding ends of the pin 25 are inserted respectively in the holes 28 and 29 of these sockets and that one of their ends is in contact with the secondary shaft 12 and their other end extends beyond the washer 20 and the elastic ring 19, their periphery being in contact with the washer 20.

 As can be seen in Figure 3, the sockets 26 and 27 have a hexagonal profile and their holes 28 and 29 receiving the ends of the pin 25 are off-center so that the distance between the axis of the holes 28 and 29 and each of their faces varies. So,. by rotation of the sockets 26 and 27 for example using a wrench, it is possible to modify the compression or the axial deformation of the elastic element 19, the sockets 26 and 27 being, in the adjusted position, arranged so that one of their faces is in contact with the washer 20.

 Generally identified by the references 30 and 31, the system 4 also comprises, outside of the housing 9, two means of connection in rotation between the secondary shaft 12 and the leaf 1, these means of connection in rotation being produced symmetrically and the connecting means 30 being -solidated from the upper end of the secondary shaft 12 while the connecting means 31 is secured to its lower end.

 The connecting means 30 comprises two links 32 and 33 which are, at their ends, hinged together around an axis 34 which passes through them, the links 32 and 33 respectively carrying bearings 35 and 36 which surround the axis 34 and being separated by a washer 37.

 The end of the link 32 opposite its hinged end on the link 33 is fixed to a ring 38 which is itself fixed to the upper end of the secondary shaft 12, outside the housing 9, by l 'through a needle screw 39, the link 32 extending radially to the secondary shaft 12 and the axis 34 and the secondary shaft 12 being parallel.

 The end of the link 33 opposite its end articulated around the link-32 is connected to the leaf 1 by means of a joint comprising an L-shaped support 40, one of the wings of which is fixed to the leaf 1 at a distance from the hinge 3 and the other axis of which carries a hinge pin 41 which passes through a bearing 42 mounted in the link 33 which is parallel to the axis 34 and to the secondary shaft 12, the axis 41 being able to between, like the axis 34, formed in a simple way by a rivet or a bolt.

 The bearing 13 and the ring 38 form a sealed connection between the secondary shaft 12 and the housing 9. In fact, the bearing 13 has an L-shaped section wall whose radial wing 43 extends opposite and at the outside of the housing 9 around the opening of the housing 9 and of the support 5 crossed by its axial wing 44, a seal 45 being disposed between the radial wing 43 and the housing 9 while a circlip 46 is in engagement with the axial wing 44 and bears against the inner face of the upper wing 7 of the support 5 so as to crush the annular seal 45. The seal between the bearing 13 and the secondary shaft 12 is produced by a O-ring 47 which is disposed in an inner annular groove of the bearing 13 and which bears on the periphery of the secondary shaft 12. Between the ring 38 and the radial wing 43 of the bearing 13 is also disposed a sealing washer 48 and, bearing on the outer face of the ring 38, a ring is mounted 49 by means of a screw 50 which is screwed into the end of the secondary shaft 12.

 The housing 9 and the friend 6 of the support 5 include four through holes 51 which are intended for fixing the system on the post 2 for example by screws. In the example shown, two orifices placed on either side of the secondary shaft 12 and adjacent to the wings 7 and 8 of the support 5 are provided.

 To open or close the leaf 1, it suffices to supply electrical power to the gear motor 10 so as to rotate its output shaft 11 in one direction or the other. It will be noted that, in the example shown, the output shaft i1 of the gear motor 10 rotates in the opposite direction to the leaf 1.

 The pinion 23 mounted on the end of the output shaft 11 of the gear motor 10 rotates the pinion 17. Thanks to the friction between the pinion 17 and the rings 22 and 18 due to the axial pressure caused by the crushing of the rubber ring 19 in the direction of the ring 16 fixed on the secondary shaft 12, the secondary shaft 12 is driven in rotation and causes the leaf 1 to rotate by means of the rods of the rotation connection means 30 and 32.

 The open position of the leaf i and the closed position of the latter correspond to two extreme positions of the secondary shaft 12. In order to detect these two extreme positions of the auxiliary shaft 12, a detector 52 is provided, comprising a finger 53 which can cooperate with two notches provided in the ring 16 linked in rotation with the secondary shaft 12, these two notches being suitably disposed at the periphery of this ring 16.

 In the example shown, when the leaf 1 is in the closed position, the axes of the secondary shaft 12 and the articulation axes 34 and 41 are in the same plane. In order to limit the rotational movement of the link 32 caused by the gear motor 10, the end of the link 32 which extends well beyond the axis of articulation 34 carries a finger 54 which forms a stop. It will be noted that as the links 32 and 33 are aligned, they form a means for locking the leaf in the closed position by stop.

To increase the security of this locking means formed by the links 32 and 33, provision could be made for the articulation axis 34 to go slightly beyond the line joining the axis of the secondary shaft 12 and the axis of the joint 41, the finger 54 being arranged accordingly and forming a stop involved in the locking in the closed position of the leaf 1. It will be noted that in the example, when the leaf 1 is opened, the axis of articulation 34 moves away from leaf 1 while, when it is closed, it approaches it.

 It is also possible to operate the leaf 1 manually to open or close it. In particular, if it is desired to open the leaf 1 from its closed position, it suffices to act with one hand on one of the rods of the connecting means 30 and 31 in the direction which moves the axis 34 away from the leaf 1. The connecting means 30 and 31 are then released and the leaf 1 can be opened.

 If, during the operation of the leaf 1, this leaf is stopped in some way, the pinion 17 will rotate by rubbing on the rings 16 and 18. As the washer 20 and the elastic ring 19 are placed between the ring 18 and the holding means 21 which are integral in rotation with the secondary shaft 12, the ring 19 will not undergo any torsional deformation torque.

 The torque at which the pinion 17 slides on the rings 16 and 18 obviously depends on the axial force exerted by the elastic element 19. The value of this torque is easily adjustable thanks to the holding means 21 by rotation of its hexagonal sockets 26 and 27.

 The closing and opening system 4 may also include electronic circuits arranged in the housing 9, these electronic circuits not having been shown in the figures.

These electronic circuits can be designed to remotely control the gear motor 10.

 The closing and opening system 4 as just described has many advantages. In particular, it allows the use of a small-sized motor-reducer, it can be associated with different leaves because the deformation of the elastic element is easily adjustable, it is perfectly protected against weather and dust and it forms at the same time a means for operating the leaf 1, a means for locking this leaf in the closed position.

 The present invention is obviously not limited to the example described above. One can indeed replace the rubber ring 19 for example with elastic washers. A single connection means can be provided between the secondary shaft 12 and the leaf 1, the other end of the secondary shaft 12 then preferably being articulated inside the housing 9. It is also possible to replace the section sockets hexagonal 26 and 27 by cylindrical sockets, the adjustment of the pressure or the axial deformation of the elastic element 19 can be achieved by taking sockets of different diameter larger or smaller. A connection can be provided between the output shaft 11 of the gear motor 10 and the friction drive device 15 with several pinions, for example to increase the speed of rotation of the output shaft 11 relative to the speed of rotation of the secondary shaft 12. Furthermore, the means making it possible to produce a high coefficient of friction of the friction drive device 15 may be different, and in particular discs could be used. Many other variants are possible without departing from the scope of the present invention defined by the appended claims.

Claims (12)

RESELL ICAT IONS  1. System intended for closing and / or opening a leaf, in particular a door leaf or gate leaf, comprising a drive means such as a gear motor, the output shaft of which is rotationally connected to said leaf by means of a torque limiting friction device, characterized in that it comprises a secondary shaft (12) on which is mounted the friction drive device (15) and which allows transmitting the rotational movement of the output shaft (11) of the drive means (10) to the leaf by means of the friction device.  2. System according to claim 1, characterized in that it comprises a gear link between the output shaft (11) of the drive means and said secondary shaft (12).  3. System according to claim 1, characterized in that the friction device (15) comprises a wheel (17) mounted free in rotation on said secondary shaft (12) and connected in rotation to the output shaft (11) of said drive means, as well as means integral in rotation with said secondary shaft and making it possible to connect said wheel in rotation to the secondary shaft by friction.  4. System according to claim 1, characterized in that the friction device (15) comprises, successively mounted on said secondary shaft (12), a first ring (16) forming an axial stop, a pinion (17) mounted freely on said secondary shaft and connected in rotation to the output shaft (11) of said drive means (1G) by a gear link (23), a second ring (18), an elastic element (19) axially deformable to exert a pressure on said second ring in the direction of said first ring in order to pinch said pinion and a means for maintaining (21) the pressure of the elastic element, at least one of the rings being connected in rotation to said secondary shaft in view of linking said pinion in rotation to this secondary shaft by friction of this pinion on at least one of the rings.  5. System according to claim 4, characterized in that said holding means (21) comprises a radial pin (25) passing on either side said secondary shaft (12) and sockets (26, 27) for adjustment pressure or axial deformation of the elastic element mounted on the protruding ends of the pin on either side of said secondary shaft.  6. System according to claim 5, characterized in that said sockets (26, 27) are of polygonal section and are mounted on said pin to be able to rotate around an off-center axis so that the distance between their axis of rotation and each of their faces varies.  7. System according to any one of the preceding claims, characterized in that it comprises at least one rotational connection means (30, 31) between the secondary shaft (12) and said leaf (1).  8. System according to claim 7, characterized in that said rotational connection means comprises two links (32, 33) articulated between them and one of which is articulated on said leaf and the other linked in rotation to said secondary shaft .  9. System according to claim 8, characterized in that when said leaf is in the closed position, said links are aligned or go beyond their alignment, a stop being provided to limit the movement of the links so that these links form a means for locking the leaf in the closed position by stop.  10. System according to claim 9, characterized in that at least one of the links comprises a stop (54) in rotation for the other link.  11. System according to any one of the preceding claims, characterized in that it is mounted in a housing (9), at least one of the ends of said secondary shaft extending outside of this housing in view of its connection in rotation to said leaf and a sealed connection being provided between the housing and the secondary shaft.  12. System according to any one of the preceding claims, characterized in that it comprises means (52) detecting the position of said secondary shaft with a view to cutting off the supply of said drive means when said leaf reaches its open position. or its closed position.