EP2590538B1 - Driving carriage for a motorized curtain and occultation device with such a driving carriage - Google Patents

Driving carriage for a motorized curtain and occultation device with such a driving carriage Download PDF

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Publication number
EP2590538B1
EP2590538B1 EP11743303.7A EP11743303A EP2590538B1 EP 2590538 B1 EP2590538 B1 EP 2590538B1 EP 11743303 A EP11743303 A EP 11743303A EP 2590538 B1 EP2590538 B1 EP 2590538B1
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EP
European Patent Office
Prior art keywords
carriage
rail
arm
friction wheel
case
Prior art date
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Application number
EP11743303.7A
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German (de)
French (fr)
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EP2590538A1 (en
Inventor
Pierre-Emmanuel Cavarec
Sébastien LEMAITRE
Rémi Sourain
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Somfy Activites SA
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Somfy Activites SA
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Publication of EP2590538A1 publication Critical patent/EP2590538A1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47H—FURNISHINGS FOR WINDOWS OR DOORS
    • A47H5/00—Devices for drawing draperies, curtains, or the like
    • A47H5/02—Devices for opening and closing curtains
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47H—FURNISHINGS FOR WINDOWS OR DOORS
    • A47H5/00—Devices for drawing draperies, curtains, or the like
    • A47H5/02—Devices for opening and closing curtains
    • A47H5/032—Devices with guiding means and draw cords
    • A47H5/0325—Devices with guiding means and draw cords using electrical or electronical drive, detecting or controlling means

Definitions

  • the invention relates to a motorized carriage for opening / closing a screen, this carriage being able to move along a rail, and an occultation installation of an opening comprising, among others, such a device. carriage.
  • the head carriage comprises guide wheels, generally at least two pairs of wheels, rolling along rolling tracks formed along a rail fixed near the ceiling of a room.
  • JP-A-2005-095364 and JP-A-09-327373 describe a head carriage incorporating a friction wheel rotated by a motor and adapted to be in contact, on a portion of its periphery, with a running surface formed along a rail.
  • the contact force between the friction wheel and the running surface is statically adjustable by a pressing means.
  • DE-A-24 36 753 teaches to consider the direction of movement of a carriage to adjust the contact force of a friction zone on a rail. Once the direction of movement of the carriage established, the contact force is independent of the weight of the curtain.
  • the motor must be dimensioned so as to be able to draw the curtain at the end of the race, that is to say, a significant effort proportional to the total mass of the curtain and can compensate the elastic reaction of the curtain stretched .
  • the head carriage At the beginning of a closing maneuver, the head carriage tows a light load because the mass of the curtain is supported by static support carriages. During this phase, the head carriage moves only a few support carriages and therefore only a few curtain panels, which represents a low weight. Then, the head carriage drives more and more support trolleys. As a result, it tows a mass of curtain larger.
  • the carriage needs to provide a significant effort, in particular proportional to the total mass of the curtain.
  • the motor is oversized, which results in poor performance of the device and therefore negatively influences the engine consumption. This disadvantage is even more penalizing when the engine is powered by an autonomous power source, in which case the optimization of the consumption is sought.
  • the invention provides a motorized curtain carriage to optimize the energy consumption of the engine.
  • the invention relates to a motorized carriage for opening / closing a screen, this carriage being according to claim 1 or claim 2.
  • the carriage is similar to the carriages of the prior art cited above with the exception of the pressing means which is designed to allow the variation of the contact force as a function of the evolution of the load pulled or pushed by the carriage during its movement, including the weight of the deployed portion of the curtain and associated carriages.
  • the carriage comprises at least two pairs of guide wheels rolling on tracks of the rail.
  • the pressing means enables the friction wheel to be brought closer to the rail by modifying the vertical distance between the axis of the friction wheel and a plane passing through the contacts of the guide wheels with the tracks of the rail.
  • This rating can be adjusted by simple means. In reality, this is a small variation of this value since, in operation, the friction wheel is continuously in contact with the rail. This variation is in fact directly proportional to the wheel deformation due to the increase of the pressure force.
  • one solution consists in that the pressing means modifies the spacing of the two pairs of guide wheels to vary the contact force between the friction wheel and the corresponding running surface of the rail.
  • the pressing means comprises a movable element relative to a housing supporting the friction wheel, the movable element, on which is hung the curtain to move, supporting one of the two pairs of guide wheels.
  • the pair of guide wheels associated with the movable member is braked proportionally to the curtain mass pulled or pushed, which naturally tends to separate or bring the two pairs of guide wheels.
  • the friction wheel can then be plated, more or less strongly, on the running surface depending on the spacing of the guide wheels, which results in a variation of the contact force between the friction wheel and the running surface.
  • the device of the invention is particularly suitable for a motorized system powered by an autonomous power source.
  • the invention also relates to an occultation installation of an opening comprising a rail, a motorized carriage and a curtain attached to the motorized carriage, characterized in that the carriage is as mentioned above and its friction wheel is in contact with the running surface of the rail and exerts on this surface a variable contact force as a function of the resistant force.
  • the figure 1 illustrates a known system of motorization of a curtain 10 in a blind installation of a window which is not shown for clarity of the drawing.
  • the curtain which forms an occultation screen, is suspended from trolleys of two types, 20 and 100 by hooks not shown. These carriages comprise guide wheels rolling on rolling tracks arranged along a rail 50 fixed near the ceiling of a room. Thus, the curtain can move freely along the rail. At one of its high ends, the curtain is hooked to a stop 30 fixed to the rail. At its other high end, the curtain is attached to a motorized head carriage 100 whose structure is detailed on the Figures 2 and 3 .
  • the curtain 10 is composed of sections of fabric P11, P12, P13, P14, P15, P16 corresponding to the fabric surface hanging between two support carriages 20.
  • the closing of the curtain takes place by moving the curtain to the left at the figure 1 . Its opening takes place by moving it to the right.
  • the words “up” and “down”, “upper” and “lower” are used with reference to an operating configuration of the system of the figure 1 .
  • the words “before” and “back” relate to the direction of movement of the curtain 10 when it is closed.
  • a "front” part is located on the left of the figure 1 compared to a “back” part.
  • the towed mass evolves as the head carriage 100 moves the support carriages 20 and the fabric sections P11 to P16.
  • the support trolleys are driven by the fabric stretched between two support carriages or by a link connecting two consecutive carriages, for example, a chain.
  • the head carriage begins by stretching the first pan P11, then drives the first support carriage 20, then extends the second pan P12, then drives the second carriage 20 and so on.
  • the last panels P12, P13, P14, P15, P16 do not move, they are supported by static support carriages 20. The mass of these last panels is distributed on these carriages and is not pulled by the head carriage 100.
  • the mass towed by the head carriage increases as the curtain 10 is closed. of the effort necessary to ensure the closing of the curtain is not regular. It increases significantly towards the end of the race to move the total mass of the curtain but also to compensate for the elastic reaction of the curtain in traction.
  • the pushed mass also changes as the head carriage 100 pushes the support carriages, the sides P11 to P16 being loose between two support carriages 20.
  • the head carriage starts by relaxing the first pan P11, then pushes the first carriage support, then relaxes the second pan P12, and so on.
  • the last panels P12, P13, P14, P15, P16 do not move, they are supported by static support carriages 20 which support the bulk of the mass of the curtain.
  • the mass of curtain pushed by the head carriage increases as the screen is opened.
  • the evolution of the effort required to ensure the opening of the curtain is not regular. It increases significantly towards the end of the stroke to move the total mass of the curtain but also to compensate for the elastic reaction of the curtain in compression.
  • a first solution is to detect the tension of the curtain.
  • the fabric or the link between a support carriage 20 and another adjacent carriage 20 or 100 is stretched. Since the last pan P16 of the curtain is connected to the stop 30 fixed on the rail 50, the movement of the motorized head carriage 100 is stopped. This motorized trolley 100 can therefore stop on detecting an increase in torque or a variation in speed.
  • one solution is to place a stop 40 on the trajectory of the head carriage. This stops as soon as it meets the stop 40.
  • the detection principle may be similar to the previous solution.
  • This second solution has the advantage of controlling the stopping position of the head carriage and also it avoids stretching the fabric of the curtain 100, which is less likely to damage it.
  • This solution is particularly suitable for a double curtain structure closing at the center of the rail or at desired positions.
  • the two curtains can have a different race.
  • the first curtain may, for example, have a race corresponding to one third of the length of the rail while the second curtain will have a race corresponding to two thirds.
  • the same stop 40 can be used for both curtains, thus ensuring control of the stopping position of the two head carriages.
  • This common abutment can also be used to resynchronize the two motorized carriages which is more relevant in the case of a central stop.
  • the opening of the curtain stops when the set of support carriages is stacked and abuts against the stop 30.
  • the detection of this stop by the motorized carriage 100 is similar to the detection described above.
  • the Figures 2 and 3 represent a known motorized trolley.
  • the motorized carriage 100 comprises a housing 110 suspended from the rail 50 of "square" section. It is split longitudinally on its underside, thus forming, on either side of the slot 55, two inner tracks 51 and 52 and two outer race surfaces 53 and 54.
  • the inner tracks are intended to receive support and guide the guide wheels of the motorized trolley and support trolleys.
  • the housing 110 is suspended, at the front, a first pair of guide wheels 151, 152 respectively rolling on the tracks 51, 52 and, at the rear, a second pair of guide wheels rolling respectively on the tracks. 51, 52. Only one of these wheels is visible, at the figure 2 , with the reference 162.
  • the other rear wheel 161 is located behind the wheel 151 in the representation of the figure 3 and behind the wheel 162 in the representation of the figure 2 .
  • the carriage 100 moves along the rail 50 through a friction wheel 140, housed in the housing 110, rolling on the bearing surfaces 53 and 54.
  • the axis X 141 of rotation of the wheel 140 is substantially perpendicular to the direction of movement of the carriage along the rail and substantially parallel to the axes of the guide wheels.
  • the motorization of the carriage is performed by an electric motor 130 powered by an autonomous power source 120, such as batteries.
  • the motor 130 rotates the friction wheel 140 by a transmission 135 shown schematically on the figure 2 .
  • the pressing means described in this solution is integrated in one of the suspensions of the housing 110.
  • the first front suspension comprises the front wheels 151 and 152 rotating about an axis X 153 materialized by a front shaft 153.
  • a front suspension arm 154 passes through the slot 55 and connects the center of the front shaft 153 to the housing 110.
  • the second rear suspension is composed of the rear wheels 161 and 162 rotating about an axis X 163 materialized by a rear shaft 163.
  • a rear arm of The suspension 164 passes through the slot 55 and connects the center of the rear shaft 163 to the housing 110 at a longitudinal distance d from the pair of front wheels.
  • the second rear arm 164 is not fixed directly to the housing 110.
  • This rear arm 164 passes through a wall of the housing. It comprises a thread 164a at one end so as to cooperate with a nut 165.
  • a helical spring 166 centered by the rear arm, presses, on one side, against an inner wall of the housing and, on the other side, against the nut 165. Accordingly, the screwing of the nut 165 on the thread 164a of the rear arm 164 compresses the spring 166 which transmits the compressive force on the inner wall of the housing 110.
  • the housing pivots around the X axis 153 of the front shaft 153 so as to bring the rear of the housing 10 of the rail 50.
  • This movement is limited by the friction wheel 140 housed between the two arms and a portion of which exceeds the upper face 111 of the housing, thanks to a slot 112 formed on this face.
  • this friction wheel which rotates about the axis X 141 materialized by a shaft 141 integral with the housing, abuts against the rolling surfaces 53 and 54 of the rail, thus blocking the pivoting of the housing around the X axis 153 .
  • the elements 164, 165 and 166 and the internal face of the housing 110 together constitute the pressing means of the wheel 140 against the running surfaces 53 and 54.
  • the variation of the compression force of the spring 166 makes it possible to vary the contact force between the friction wheel 140 and the running surfaces 53 and 54.
  • This contact force results from a double contact which is exerted, on the one hand, between the guide wheels 151, 152, 161 and 162 and the tracks 51, 52 of the rail 50 and, on the other hand, between a portion of the periphery of the friction wheel 140 and the rolling surfaces. 53, 54.
  • the intensity of the contact force exerted by the friction wheel 140 depends on its position relative to the rail 50. Its position varies as a function of the pivot angle of the housing with respect to the X axis 153 .
  • the pressing means 110-164-165-166 makes it possible to adjust this angle, and thus to directly modify the contact force.
  • the pivot angle or the variation of position of the wheel relative to the rail is low. Indeed, in operation, the friction wheel is continuously in contact with the rail. However, it is the crushing of the wheel against the rolling surfaces that generates the increase in the contact force. As a result, the crush height defines the pivot angle and the position variation of the wheel relative to the rail.
  • the wheel is preferably relatively flexible material which increases the crush height and increase the contact surface.
  • the housing 110 comprises a first lug 113, at the front of the carriage and a second lug 114, at the rear of the carriage. These two ears allow the hooking hooks not shown and fixed on the top of the first pan P11 of the curtain.
  • the contact force must be adjusted to be able to drive the total mass of the curtain 10 equipped with support carriages 20, this is at say, the load to tow at the end of a curtain move. Once set, this effort does not vary during the movement. Thus, at the beginning of a movement of the curtain, the contact force is stronger than necessary. Since the electrical consumption of the motor is directly proportional to this contact force, it is penalized during most of the curtain stroke.
  • the Figures 4 to 6 represent a first embodiment of the invention.
  • the overall structure of the motorized trolley 100b is similar to that of the motorized trolley 100 of the prior art described above, with the exception of the pressing means.
  • the elements of the motorized carriage according to this embodiment are referenced by the same numbers as those of the motorized carriage of the prior art to which the index "b" is added. Elements identical to those of Figures 1 to 3 are not described in detail.
  • the carriage 100b comprises a motor and a transmission not shown and similar to the elements 130 and 135 which rotate a friction wheel 140b.
  • the pressing means of the friction wheel 140b on the running surfaces 53 and 54 of the rail 50 is formed by a rear attachment device of the motorized trolley 100b.
  • the rear suspension arm 164b of the carriage 100b includes an end similar to that of the rear arm 164 at the rail but differs at its other end.
  • the rear arm 164b On the side of the rail 50, the rear arm 164b is connected to a rear shaft 163b supporting two rear guide wheels 161b and 162b.
  • the rear arm 164b thus serves to support the carriage 100b under the rail 50, as the rear arm 164 of the carriage 100, in cooperation with a front arm 154b identical to the front arm 154.
  • the rear arm 164b is hinged to an ear 115b secured to the housing 110b of the motorized trolley 100b, about an axis X 167b materialized by a second shaft 167b. Consequently, the rear arm 164b can pivot about the X axis 167b which is parallel to the axes of the guide wheels 151b, 152b, 161b and 162b and perpendicular to the direction of travel of the carriage 100b along the rail 50. Moreover, the rear arm 164b supports an ear 114b for hooking a hook, not shown and fixed on the top of the first panel P11 of the curtain.
  • the figure 4 represents the position of the motorized carriage 100b at rest.
  • the rear arm 164b is in a vertical position, its longitudinal axis A 164b coinciding with a vertical line D intersecting the X axis 167b .
  • the axes X 153b and X 163b of the two pairs of guide wheels 151b / 152b and 161b / 162b are spaced a distance E 1b , along the rail 50.
  • the friction wheel 140b exerts a contact force F R distributed over running surfaces 53 and 54.
  • the figure 5 illustrates the closing of the curtain.
  • the carriage 100b moves in the direction of the arrow F 1 .
  • the friction wheel 140b rolls along the rolling surfaces 53 and 54 by rotating about an X axis 141b , thereby causing the carriage 100b to move, which in turn drives the curtain via the lug 114b.
  • the rear arm 164b rotates, clockwise to the figure 5 around the pivot axis X 167b .
  • This rotation increases the value of an angle ⁇ defined between the vertical line D intersecting the X axis 167b and the longitudinal axis A 164b of the rear arm 164b.
  • the rear arm 164b is then beyond the line D with respect to the housing 110b of the carriage 100b.
  • This rotation causes, on the one hand, the spacing of the two pairs of wheels 151b / 152b and 161b / 162b relative to each other and, on the other hand, the pivoting of the housing 110b around the axis X 153b , anti-clockwise represented by the arrow F 2 .
  • the distance between the axes of rotation X 153b and X 163b of the pairs of guide wheels increases to a value E 2b greater than the value E 1b .
  • the carriage 100b thus passes from the configuration represented by the box 110b in dashed lines to the configuration in solid lines at the figure 5 .
  • the figure 6 illustrates the opening of the curtain.
  • the operating principle is similar to that of closing the curtain.
  • the friction wheel 140b rolls along the tread surfaces 53 and 54, thereby causing movement in the direction of the arrow F 3 of the carriage 100b which pushes, in turn, the curtain via the ear 114b.
  • the mass M T pushed curtain M P increases the resistive force R P increases and the rear arm 164b rotates, anti-clockwise around the pivot axis X 167b .
  • This rotation increases the absolute value of an angle ⁇ defined between the line D and the axis A 164b .
  • the rear arm 164b is then between the line D and the housing 110b.
  • This rotation causes, on the one hand, the approximation of the two pairs of guide wheels 151b / 152b and 161b / 162b and, on the other hand, the pivoting of the casing 110b about the axis X 153b , in the anti- rotation direction. time represented by the arrow F 2 .
  • the distance between the axes X 153b and X 163b then decreases to a value E 3b less than the value E 1b .
  • the carriage 100b changes from the configuration represented by the dotted box 110b to the solid line configuration at the figure 6 .
  • the Figures 7 and 8 represent a second embodiment of the invention.
  • the structure of the motorized trolley 100c is similar to that of the motorized trolley 100 of the prior art described above, with the exception of the pressing means.
  • the elements of the motorized trolley according to this embodiment are referenced by the same numbers of the motorized trolley of the prior art to which the index "c" is added. Elements identical to those of Figures 1 to 3 are not described in detail.
  • the carriage 100c comprises a motor and a transmission not shown and similar to the elements 130 and 135 which rotate a friction wheel 140b.
  • the pressing means of the friction wheel 140b on the running surfaces 53 and 54 of the rail 50 is also formed by a rear attachment device of the motorized trolley 100c.
  • the rear suspension arm 164c of the carriage 100c has an end similar to that of the rear arm 164 at the rail but differs at its other end.
  • the rear arm 164c On the side of the rail 50, the rear arm 164c is connected to a rear shaft 163c supporting two rear guide wheels 161c and 162c.
  • the rear wheels 161c and 162c also serve to suspend the carriage 100c under the rail 50, in conjunction with the front wheels 151c and 152c rotatably mounted at the upper end of a front suspension arm 154c identical to the front arm 154.
  • the rear arm 164c carries a pin 168c extending in a direction parallel to the axes X 153c and X 163c of rotation of the guide wheels.
  • This pin cooperates with a guide path 116c, inverted "V" formed on an ear 115c integral with the housing 110c of the motorized carriage 100c.
  • the path of 116c is formed by a light cut into the ear 115c.
  • the arm comprises two pins, arranged on either side of the arm.
  • the housing is secured to two lugs 115c each incorporating a guide path associated with each peg.
  • the rear arm 164c extends, opposite the rear wheels 161c, 162c by an ear 114c for hooking a hook not shown attached to the top of the first panel P11 of the curtain.
  • the adjustment of the contact force between the friction wheel and the running surface is obtained by varying the spacing between the two pairs of wheels 151c / 152c and 161c / 162c.
  • the figure 7 represents the position of the motorized carriage 100c at rest.
  • the pin 168c is located at the top and in the middle of the inverted "V" shaped guide track 116c.
  • the two pairs of wheels 151c / 152c and 161c / 162c are spaced apart by a distance E 1c .
  • the friction wheel 140c exerts a force F R distributed on the running surfaces 53 and 54.
  • the figure 8 illustrates the closing of the curtain.
  • the friction wheel rolls along the running surfaces by rotating about an X axis 141c , thereby causing the carriage 100c to move in the direction of the arrow F 1 , which causes the curtain via the ear 114c.
  • the load resistance R T increases and the rear arm 164c moves horizontally in the direction opposite to the movement of the carriage.
  • the displacement of the carriage 100c relative to the ear 114c is a translation along one of the rectilinear branches of the guide path 116c.
  • the path 116c therefore constitutes a guide cam of the rear arm 164c, via the pin 168c.
  • This movement thus causes the spacing of the two pairs of wheels 151c / 152c and 161c / 162c arriving at a position where their axes of rotation X 153c and X 163c are spaced apart by a distance E 2c greater than the distance E 1c .
  • this translation causes the casing 110c to pivot about the axis X 153c , in the direction of the arrow F 2 .
  • the carriage 100c thus passes from the configuration represented by the box 110b in dashed lines to the configuration in solid lines at the figure 8 .
  • the reasoning is the same except that the two pairs of wheels 151c / 152c and 161c / 162c are getting closer.
  • the pawn then cooperates with the other inverted "V" branch in a manner comparable to that described with reference to the figure 6 for the first embodiment.
  • the contact force F R between the friction wheel 140b or 140c and the running surfaces 53 and 54 in the rest position can be adjustable.
  • the solutions described consist in using the reaction force generated following the compression of the friction wheel against the running surfaces.
  • return means such as one or more springs, for bringing the movable member of the pressing means to an equilibrium position.
  • the pressing means of the carriage makes it possible to take account of the evolution of the weight of the towed or pushed part of the curtain, and therefore of the evolution of the load, by adjusting accordingly the contact force. Indeed, the higher the weight of the curtain, the more the resistant force increases and the movable arm 164b, 164c or equivalent is displaced relative to the housing 110b or 110c and from its rest position, which induces a corresponding increase in contact force.
  • the drive motor of the friction wheel 140b or 140c is fed from an autonomous power source, similar to the source 120 shown in FIG. figure 2 for example a set of batteries.
  • the front high end of the curtain is hooked to the rear arm of the carriage.
  • this high end of the curtain can also be attached to the carriage housing so as to hide it.
  • an ear can extend to the front of the carriage analogously to the ear 113 in the prior art.
  • the invention is described in the case where the friction zone 140b or 140c cooperates with two running surfaces 53 and 54. It also applies in the case where this zone cooperates with a single running surface.
  • the invention is not limited to the embodiments described.
  • Other solutions may be envisaged to vary the contact force depending on the evolution of the load pulled or pushed by the carriage during its movement. Similarly, the evolution of the contact force can be obtained by simple translation of the housing of the carriage, and more particularly of the friction wheel, towards the rail instead of rotating it about an axis.
  • the invention can also be adapted to carriages moving along other types of rail having a different profile.
  • the rail must thus be considered as a support for guiding the carriage, its important shape little.
  • the rail may be a circular section rod truncated by a flat portion on its lower part so as to form the raceway for the friction wheel.
  • the curtain is attached to rings surrounding the quasi-circular rod.
  • the concept of "load” must be understood in the broad sense, including also the effects related to a load variation such as the "inertia" of the screen during its displacement.
  • the invention also covers horizontally sliding panels.
  • the operating principle is reversed.
  • the effort to be supplied is important since the carriage must set in motion the movable panel.
  • the screen is driven, the effort to be supplied decreases thanks to the inertia of the panel.
  • a carriage incorporating the principle of the invention therefore makes it possible to adapt its energy requirement as a function of the movement of the panel.

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  • Curtains And Furnishings For Windows Or Doors (AREA)

Description

Domaine technique : Technical field :

L'invention concerne un chariot motorisé d'ouverture/fermeture d'un écran, ce chariot étant apte à se déplacer le long d'un rail, ainsi qu'une installation d'occultation d'une ouverture comprenant, entre autres, un tel chariot.The invention relates to a motorized carriage for opening / closing a screen, this carriage being able to move along a rail, and an occultation installation of an opening comprising, among others, such a device. carriage.

Etat de la technique : State of the art :

Il existe de nombreux dispositifs permettant de manoeuvrer l'ouverture d'un rideau. Une des solutions consiste à motoriser le déplacement du chariot de tête sur lequel est fixée une extrémité du rideau. Le chariot de tête comprend des roues de guidage, en général, au moins deux paires de roues, roulant le long de pistes de roulement formées le long d'un rail fixé à proximité du plafond d'une pièce.There are many devices for manipulating the opening of a curtain. One of the solutions is to motorize the movement of the head carriage on which is fixed one end of the curtain. The head carriage comprises guide wheels, generally at least two pairs of wheels, rolling along rolling tracks formed along a rail fixed near the ceiling of a room.

Les demandes JP-A-2005-095364 et JP-A-09-327373 décrivent un chariot de tête incorporant une roue de friction entraînée en rotation par un moteur et apte à être en contact, sur une portion de sa périphérie, avec une surface de roulement formée le long d'un rail. L'effort de contact entre la roue de friction et la surface de roulement est réglable, en statique, par un moyen presseur.The requests JP-A-2005-095364 and JP-A-09-327373 describe a head carriage incorporating a friction wheel rotated by a motor and adapted to be in contact, on a portion of its periphery, with a running surface formed along a rail. The contact force between the friction wheel and the running surface is statically adjustable by a pressing means.

DE-A-24 36 753 enseigne de tenir compte du sens de déplacement d'un chariot pour ajuster l'effort de contact d'une zone de friction sur un rail. Une fois le sens de déplacement du chariot établi, l'effort de contact est indépendant du poids du rideau. DE-A-24 36 753 teaches to consider the direction of movement of a carriage to adjust the contact force of a friction zone on a rail. Once the direction of movement of the carriage established, the contact force is independent of the weight of the curtain.

Or, lors du déplacement d'un rideau, l'effort nécessaire à fournir au chariot de tête afin d'entraîner le rideau, évolue au fur et à mesure de son déplacement. Pour pouvoir fermer le rideau, le moteur doit être dimensionné de manière à pouvoir tracter le rideau en fin de course, c'est-à-dire, un effort important proportionnel à la masse totale du rideau et pouvant compenser la réaction élastique du rideau tendu. Au début d'une manoeuvre de fermeture, le chariot de tête tracte une faible charge, car la masse du rideau est supportée par des chariots support statiques. Durant cette phase, le chariot de tête ne déplace que quelques chariots support et donc uniquement quelques pans de rideau, ce qui représente un faible poids. Puis, le chariot de tête entraîne de plus en plus de chariots support. En conséquence, il tracte une masse de rideau plus grande. En fin de course, le chariot a besoin de fournir un effort important, notamment proportionnel à la masse totale du rideau. De ce fait, en début de fermeture de rideau, le moteur est surdimensionné, ce qui se traduit par un mauvais rendement du dispositif et, donc, influe négativement la consommation du moteur. Cet inconvénient est encore plus pénalisant lorsque le moteur est alimenté par une source d'énergie autonome, cas pour lequel l'optimisation de la consommation est recherchée.However, when moving a curtain, the effort required to provide the head carriage to drive the curtain, evolves as it moves. To be able to close the curtain, the motor must be dimensioned so as to be able to draw the curtain at the end of the race, that is to say, a significant effort proportional to the total mass of the curtain and can compensate the elastic reaction of the curtain stretched . At the beginning of a closing maneuver, the head carriage tows a light load because the mass of the curtain is supported by static support carriages. During this phase, the head carriage moves only a few support carriages and therefore only a few curtain panels, which represents a low weight. Then, the head carriage drives more and more support trolleys. As a result, it tows a mass of curtain larger. At the end of the race, the carriage needs to provide a significant effort, in particular proportional to the total mass of the curtain. As a result, at the beginning of curtain closing, the motor is oversized, which results in poor performance of the device and therefore negatively influences the engine consumption. This disadvantage is even more penalizing when the engine is powered by an autonomous power source, in which case the optimization of the consumption is sought.

Exposé de l'invention : Presentation of the invention

L'invention propose un chariot de rideau motorisé permettant d'optimiser la consommation énergétique du moteur.The invention provides a motorized curtain carriage to optimize the energy consumption of the engine.

A cet effet, l'invention concerne un chariot motorisé d'ouverture/fermeture d'un écran, ce chariot étant selon la revendication 1 ou selon la revendication 2.For this purpose, the invention relates to a motorized carriage for opening / closing a screen, this carriage being according to claim 1 or claim 2.

Ainsi, le chariot est similaire aux chariots de l'art antérieur cités précédemment à l'exception du moyen presseur qui est conçu de manière à permettre la variation de l'effort de contact en fonction de l'évolution de la charge tractée ou poussée par le chariot lors de son déplacement, notamment du poids de la partie déployée du rideau et des chariots associés.Thus, the carriage is similar to the carriages of the prior art cited above with the exception of the pressing means which is designed to allow the variation of the contact force as a function of the evolution of the load pulled or pushed by the carriage during its movement, including the weight of the deployed portion of the curtain and associated carriages.

Selon des aspects avantageux mais non obligatoires de l'invention, un tel chariot peut incorporer une ou plusieurs des caractéristiques suivantes, prises dans toute combinaison techniquement admissible :

  • Le moyen presseur permet de modifier la distance entre l'axe de rotation de la roue de friction et la surface de roulement du rail.
  • Le boîtier pivote autour d'un axe parallèle à l'axe de rotation de la roue de friction.
  • L'axe de pivotement du boîtier est confondu avec l'axe de rotation des roues d'une paire de roues de guidage.
  • Le bras mobile du moyen presseur peut pivoter par rapport au boîtier autour d'un axe parallèle à l'axe de la roue de friction, en fonction de l'évolution de l'effort résistant. - Un moteur d'entraînement de la roue de friction est alimenté par une source d'énergie autonome.
According to advantageous but non-obligatory aspects of the invention, such a carriage may incorporate one or more of the following features, taken in any technically permissible combination:
  • The pressing means makes it possible to modify the distance between the axis of rotation of the friction wheel and the running surface of the rail.
  • The housing pivots about an axis parallel to the axis of rotation of the friction wheel.
  • The pivot axis of the housing coincides with the axis of rotation of the wheels of a pair of guide wheels.
  • The movable arm of the pressing means is pivotable relative to the housing about an axis parallel to the axis of the friction wheel, depending on the evolution of the resistant force. - A drive motor of the friction wheel is powered by an autonomous power source.

Généralement, le chariot comprend au moins deux paires de roues de guidage roulant sur des pistes du rail. Préférentiellement, le moyen presseur permet de rapprocher la roue de friction du rail en modifiant la distance verticale entre l'axe de la roue de friction et un plan passant par les contacts des roues de guidage avec les pistes du rail. Cette cote peut être réglée par des moyens simples. En réalité, il s'agit d'une faible variation de cette valeur puisque, en fonctionnement, la roue de friction est continuellement en contact avec la rail. Cette variation est en fait directement proportionnelle à la déformation de roue due à l'augmentation de l'effort de pression.Generally, the carriage comprises at least two pairs of guide wheels rolling on tracks of the rail. Preferably, the pressing means enables the friction wheel to be brought closer to the rail by modifying the vertical distance between the axis of the friction wheel and a plane passing through the contacts of the guide wheels with the tracks of the rail. This rating can be adjusted by simple means. In reality, this is a small variation of this value since, in operation, the friction wheel is continuously in contact with the rail. This variation is in fact directly proportional to the wheel deformation due to the increase of the pressure force.

Parmi les moyens simples de réglage, une solution consiste à ce que le moyen presseur modifie l'écartement des deux paires de roues de guidage pour faire varier l'effort de contact entre la roue de friction et la surface de roulement correspondante du rail.Among the simple means of adjustment, one solution consists in that the pressing means modifies the spacing of the two pairs of guide wheels to vary the contact force between the friction wheel and the corresponding running surface of the rail.

Avantageusement, le moyen presseur comporte un élément mobile par rapport à un boîtier supportant la roue de friction, l'élément mobile, sur lequel est accroché le rideau à déplacer, supportant une des deux paires de roues de guidage. Avec cette structure, la paire de roues de guidage associée à l'élément mobile est freinée proportionnellement à la masse de rideau tractée ou poussée, ce qui tend naturellement à écarter ou rapprocher les deux paires de roues de guidage. Aussi, grâce à des pivots ou des cames, la roue de friction peut alors être plaquée, plus ou moins fortement, sur la surface de roulement en fonction de l'écartement des roues de guidage, ce qui se traduit par une variation de l'effort de contact entre la roue de friction et la surface de roulement.Advantageously, the pressing means comprises a movable element relative to a housing supporting the friction wheel, the movable element, on which is hung the curtain to move, supporting one of the two pairs of guide wheels. With this structure, the pair of guide wheels associated with the movable member is braked proportionally to the curtain mass pulled or pushed, which naturally tends to separate or bring the two pairs of guide wheels. Also, thanks to pivots or cams, the friction wheel can then be plated, more or less strongly, on the running surface depending on the spacing of the guide wheels, which results in a variation of the contact force between the friction wheel and the running surface.

Le dispositif de l'invention est particulièrement adapté à un système motorisé alimenté par une source d'énergie autonome.The device of the invention is particularly suitable for a motorized system powered by an autonomous power source.

L'invention concerne également une installation d'occultation d'une ouverture comprenant un rail, un chariot motorisé et un rideau accroché au chariot motorisé, caractérisée en ce que le chariot est tel que mentionné ci-dessus et sa roue de friction est en contact avec la surface de roulement du rail et exerce sur cette surface un effort de contact variable en fonction de l'effort résistant.The invention also relates to an occultation installation of an opening comprising a rail, a motorized carriage and a curtain attached to the motorized carriage, characterized in that the carriage is as mentioned above and its friction wheel is in contact with the running surface of the rail and exerts on this surface a variable contact force as a function of the resistant force.

Description des dessins : Description of the drawings :

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés sur lesquels :

  • la figure 1 est un schéma d'un rideau intégrant un chariot motorisé de l'art antérieur ;
  • la figure 2 est une vue schématique, en coupe longitudinale, d'un chariot motorisé de l'art antérieur en place au voisinage d'un rail de guidage représenté en vue extérieure ;
  • la figure 3 est une vue schématique de côté du chariot et du rail représentés à la figure 2 ;
  • les figures 4 à 6 sont des vues de face représentant le fonctionnement d'un chariot motorisé conforme à un premier mode de réalisation l'invention ;
  • les figures 7 à 8 sont des vues de face représentant le fonctionnement d'un chariot motorisé conforme à un deuxième mode de réalisation l'invention ;
The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the appended drawings in which:
  • the figure 1 is a diagram of a curtain incorporating a motorized carriage of the prior art;
  • the figure 2 is a schematic view, in longitudinal section, of a motorized carriage of the prior art in place in the vicinity of a guide rail shown in external view;
  • the figure 3 is a schematic side view of the carriage and rail shown in FIG. figure 2 ;
  • the Figures 4 to 6 are front views showing the operation of a motorized carriage according to a first embodiment of the invention;
  • the Figures 7 to 8 are front views showing the operation of a motorized carriage according to a second embodiment of the invention;

Description des modes de réalisation : Description of the embodiments :

La figure 1 illustre un système connu de motorisation d'un rideau 10 au sein d'une installation d'occultation d'une fenêtre qui n'est pas représentée pour la clarté du dessin. Le rideau, qui forme un écran d'occultation, est suspendu à des chariots de deux types, 20 et 100 grâce à des crochets non représentés. Ces chariots comprennent des roues de guidage roulant sur des pistes de roulement ménagés le long d'un rail 50 fixé à proximité du plafond d'une pièce. Ainsi, le rideau peut se déplacer librement le long du rail. A l'une de ses extrémités hautes, le rideau est accroché à une butée 30 fixée au rail. A son autre extrémité haute, le rideau est accroché à un chariot de tête motorisé 100 dont la structure est détaillée sur les figures 2 et 3. Le rideau 10 est composé de pans de tissu P11, P12, P13, P14, P15, P16 correspondant à la surface de tissu pendant entre deux chariots support 20.The figure 1 illustrates a known system of motorization of a curtain 10 in a blind installation of a window which is not shown for clarity of the drawing. The curtain, which forms an occultation screen, is suspended from trolleys of two types, 20 and 100 by hooks not shown. These carriages comprise guide wheels rolling on rolling tracks arranged along a rail 50 fixed near the ceiling of a room. Thus, the curtain can move freely along the rail. At one of its high ends, the curtain is hooked to a stop 30 fixed to the rail. At its other high end, the curtain is attached to a motorized head carriage 100 whose structure is detailed on the Figures 2 and 3 . The curtain 10 is composed of sections of fabric P11, P12, P13, P14, P15, P16 corresponding to the fabric surface hanging between two support carriages 20.

La fermeture du rideau a lieu en déplaçant le rideau vers la gauche à la figure 1. Son ouverture a lieu en le déplaçant vers la droite.The closing of the curtain takes place by moving the curtain to the left at the figure 1 . Its opening takes place by moving it to the right.

Dans la présente description, les mots « haut » et « bas », « supérieur » et « inférieur » sont utilisés en référence à une configuration de fonctionnement du système de la figure 1. Les mots « avant » et « arrière » sont relatifs au sens de déplacement du rideau 10 lors de sa fermeture. Ainsi, une partie « avant » est située sur la gauche de la figure 1 par rapport à une partie « arrière ».In the present description, the words "up" and "down", "upper" and "lower" are used with reference to an operating configuration of the system of the figure 1 . The words "before" and "back" relate to the direction of movement of the curtain 10 when it is closed. Thus, a "front" part is located on the left of the figure 1 compared to a "back" part.

Lors d'un mouvement de fermeture du rideau, la masse tractée évolue au fur et à mesure que le chariot de tête 100 déplace les chariots support 20 et les pans de tissu P11 à P16. Les chariots support sont entraînés grâce au tissu tendu entre deux chariots support ou grâce à un lien reliant deux chariots support consécutifs, par exemple, une chaînette. Ainsi, pour ce mouvement, le chariot de tête commence par tendre le premier pan P11, puis entraîne le premier chariot support 20, puis tend le deuxième pan P12, ensuite entraîne le deuxième chariot support 20 et ainsi de suite. En début de manoeuvre, les derniers pans P12, P13, P14, P15, P16 ne bougent pas, ils sont supportés par des chariots support 20 statiques. La masse de ces derniers pans est répartie sur ces chariots et n'est pas tractée par le chariot de tête 100. Ainsi, la masse tractée par le chariot de tête augmente au fur et à mesure de la fermeture du rideau 10. L'évolution de l'effort nécessaire pour assurer la fermeture du rideau n'est pas régulière. Elle augmente significativement vers la fin de la course pour déplacer la masse totale du rideau mais également pour compenser la réaction élastique du rideau en traction.During a closing movement of the curtain, the towed mass evolves as the head carriage 100 moves the support carriages 20 and the fabric sections P11 to P16. The support trolleys are driven by the fabric stretched between two support carriages or by a link connecting two consecutive carriages, for example, a chain. Thus, for this movement, the head carriage begins by stretching the first pan P11, then drives the first support carriage 20, then extends the second pan P12, then drives the second carriage 20 and so on. At the beginning of the maneuver, the last panels P12, P13, P14, P15, P16 do not move, they are supported by static support carriages 20. The mass of these last panels is distributed on these carriages and is not pulled by the head carriage 100. Thus, the mass towed by the head carriage increases as the curtain 10 is closed. of the effort necessary to ensure the closing of the curtain is not regular. It increases significantly towards the end of the race to move the total mass of the curtain but also to compensate for the elastic reaction of the curtain in traction.

Lors d'un mouvement d'ouverture du rideau, la masse poussée évolue également au fur et à mesure que le chariot de tête 100 pousse les chariots support, les pans P11 à P16 étant lâches entre deux chariots support 20. Dans ce cas, le chariot de tête commence par détendre le premier pan P11, puis pousse le premier chariot support, puis détend le deuxième pan P12, et ainsi de suite. En début de manoeuvre, les derniers pans P12, P13, P14, P15, P16 ne bougent pas, ils sont supportés par des chariots support statiques 20 qui supportent l'essentiel de la masse du rideau. Là encore, la masse de rideau poussée par le chariot de tête augmente au fur et à mesure de l'ouverture de l'écran. L'évolution de l'effort nécessaire pour assurer l'ouverture du rideau n'est pas régulière. Elle augmente significativement vers la fin de la course pour déplacer la masse totale du rideau mais également pour compenser la réaction élastique du rideau en compression.During an opening movement of the curtain, the pushed mass also changes as the head carriage 100 pushes the support carriages, the sides P11 to P16 being loose between two support carriages 20. In this case, the head carriage starts by relaxing the first pan P11, then pushes the first carriage support, then relaxes the second pan P12, and so on. At the beginning of the maneuver, the last panels P12, P13, P14, P15, P16 do not move, they are supported by static support carriages 20 which support the bulk of the mass of the curtain. Here again, the mass of curtain pushed by the head carriage increases as the screen is opened. The evolution of the effort required to ensure the opening of the curtain is not regular. It increases significantly towards the end of the stroke to move the total mass of the curtain but also to compensate for the elastic reaction of the curtain in compression.

Pour arrêter la fermeture du rideau 10, une première solution consiste à détecter la tension du rideau. Lorsque le rideau est déployé, le tissu ou le lien entre un chariot support 20 et un autre chariot 20 ou 100 adjacent est tendu. Du fait que le dernier pan P16 du rideau est relié à la butée 30 fixée sur le rail 50, le déplacement du chariot de tête motorisé 100 est stoppé. Ce chariot motorisé 100 peut donc s'arrêter sur détection d'une augmentation de couple ou d'une variation de vitesse.To stop closing the curtain 10, a first solution is to detect the tension of the curtain. When the curtain is deployed, the fabric or the link between a support carriage 20 and another adjacent carriage 20 or 100 is stretched. Since the last pan P16 of the curtain is connected to the stop 30 fixed on the rail 50, the movement of the motorized head carriage 100 is stopped. This motorized trolley 100 can therefore stop on detecting an increase in torque or a variation in speed.

Alternativement, une solution consiste à placer une butée 40 sur la trajectoire du chariot de tête. Celui-ci s'arrête donc dès qu'il rencontre la butée 40. Le principe de détection peut être analogue à la solution précédente. Cette deuxième solution présente l'avantage de contrôler la position d'arrêt du chariot de tête et également elle permet d'éviter de tendre le tissu du rideau 100, ce qui risque moins de l'abîmer. Cette solution est particulièrement adaptée à une structure double rideaux venant se fermer au centre du rail ou à des positions souhaitées. Dans le deuxième cas, les deux rideaux peuvent avoir une course différente. Le premier rideau peut, par exemple, avoir une course correspondant à un tiers de la longueur du rail alors que le second rideau aura une course correspondant aux deux tiers. En effet, la même butée 40 peut servir pour les deux rideaux, assurant ainsi la maîtrise de la position d'arrêt des deux chariots de tête. Cette butée commune peut également servir à resynchroniser les deux chariots motorisés ce qui est plus pertinent dans le cas d'une butée centrale.Alternatively, one solution is to place a stop 40 on the trajectory of the head carriage. This stops as soon as it meets the stop 40. The detection principle may be similar to the previous solution. This second solution has the advantage of controlling the stopping position of the head carriage and also it avoids stretching the fabric of the curtain 100, which is less likely to damage it. This solution is particularly suitable for a double curtain structure closing at the center of the rail or at desired positions. In the second case, the two curtains can have a different race. The first curtain may, for example, have a race corresponding to one third of the length of the rail while the second curtain will have a race corresponding to two thirds. Indeed, the same stop 40 can be used for both curtains, thus ensuring control of the stopping position of the two head carriages. This common abutment can also be used to resynchronize the two motorized carriages which is more relevant in the case of a central stop.

L'arrêt du rideau à l'ouverture se produit lorsque l'ensemble des chariots support s'empile et bute contre la butée 30. La détection de cette butée par le chariot motorisé 100 est analogue à la détection décrite précédemment.The opening of the curtain stops when the set of support carriages is stacked and abuts against the stop 30. The detection of this stop by the motorized carriage 100 is similar to the detection described above.

Les observations ci-dessus s'appliquent également à une installation d'occultation conforme à l'invention incorporant un chariot tel que représenté aux figures 4 à 8 et décrit ci-après.The above observations also apply to an occultation installation according to the invention incorporating a trolley as shown in FIGS. Figures 4 to 8 and described below.

Les figures 2 et 3 représentent un chariot motorisé connu. Le chariot motorisé 100 comprend un boîtier 110 suspendu au rail 50 de section « carrée ». Celui-ci est fendu longitudinalement sur sa face inférieure, formant ainsi, de part et d'autre de la fente 55, deux pistes internes 51 et 52 et deux surfaces de roulement externes 53 et 54. Les pistes internes sont destinées à recevoir en appui et guider les roues de guidage du chariot motorisé et des chariots support. Le boîtier 110 est suspendu, à l'avant, à une première paire de roues de guidage 151, 152 roulant respectivement sur les pistes 51, 52 et, à l'arrière, à une deuxième paire de roues de guidage roulant respectivement sur les pistes 51, 52. Une seule de ces roues est visible, à la figure 2, avec la référence 162. L'autre roue arrière 161 est située derrière la roue 151 dans la représentation de la figure 3 et derrière la roue 162 dans la représentation de la figure 2.The Figures 2 and 3 represent a known motorized trolley. The motorized carriage 100 comprises a housing 110 suspended from the rail 50 of "square" section. It is split longitudinally on its underside, thus forming, on either side of the slot 55, two inner tracks 51 and 52 and two outer race surfaces 53 and 54. The inner tracks are intended to receive support and guide the guide wheels of the motorized trolley and support trolleys. The housing 110 is suspended, at the front, a first pair of guide wheels 151, 152 respectively rolling on the tracks 51, 52 and, at the rear, a second pair of guide wheels rolling respectively on the tracks. 51, 52. Only one of these wheels is visible, at the figure 2 , with the reference 162. The other rear wheel 161 is located behind the wheel 151 in the representation of the figure 3 and behind the wheel 162 in the representation of the figure 2 .

Le chariot 100 se déplace le long du rail 50 grâce à une roue de friction 140, logée dans le boîtier 110, roulant sur les surfaces de roulements 53 et 54. L'axe X141 de rotation de la roue 140 est sensiblement perpendiculaire à la direction de déplacement du chariot le long du rail et sensiblement parallèle aux axes des roues de guidage. La motorisation du chariot est réalisée par un moteur électrique 130 alimenté par une source d'énergie autonome 120, telle que des piles. Le moteur 130 entraîne en rotation la roue de friction 140 par une transmission 135 représentée schématiquement sur la figure 2.The carriage 100 moves along the rail 50 through a friction wheel 140, housed in the housing 110, rolling on the bearing surfaces 53 and 54. The axis X 141 of rotation of the wheel 140 is substantially perpendicular to the direction of movement of the carriage along the rail and substantially parallel to the axes of the guide wheels. The motorization of the carriage is performed by an electric motor 130 powered by an autonomous power source 120, such as batteries. The motor 130 rotates the friction wheel 140 by a transmission 135 shown schematically on the figure 2 .

Pour que le chariot entraîne une charge déterminée, il est nécessaire que l'effort de contact entre la roue de friction 140 et les surfaces de roulement 53 et 54 soit suffisant pour que la roue 140 ne patine pas. Grâce à un moyen presseur, cet effort peut être ajusté. Le moyen presseur décrit dans cette solution est intégré dans une des suspensions du boîtier 110. La première suspension avant comprend les roues avant 151 et 152 tournant autour d'un axe X153 matérialisé par un arbre avant 153. Un bras avant de suspension 154 passe à travers la fente 55 et relie le centre de l'arbre avant 153 au boîtier 110. La deuxième suspension arrière est composée des roues arrière 161 et 162 tournant autour d'un axe X163 matérialisé par un arbre arrière 163. Un bras arrière de suspension 164 passe à travers la fente 55 et relie le centre de l'arbre arrière 163 au boîtier 110, à une distance longitudinale d de la paire de roues avant.In order for the carriage to carry a determined load, it is necessary that the contact force between the friction wheel 140 and the running surfaces 53 and 54 be sufficient for the wheel 140 not to slip. Thanks to a pressing means, this effort can be adjusted. The pressing means described in this solution is integrated in one of the suspensions of the housing 110. The first front suspension comprises the front wheels 151 and 152 rotating about an axis X 153 materialized by a front shaft 153. A front suspension arm 154 passes through the slot 55 and connects the center of the front shaft 153 to the housing 110. The second rear suspension is composed of the rear wheels 161 and 162 rotating about an axis X 163 materialized by a rear shaft 163. A rear arm of The suspension 164 passes through the slot 55 and connects the center of the rear shaft 163 to the housing 110 at a longitudinal distance d from the pair of front wheels.

Contrairement au bras avant 154, le deuxième bras arrière 164 n'est pas fixé directement sur le boîtier 110. Ce bras arrière 164 traverse une paroi du boîtier. Il comprend un filetage 164a à une extrémité de manière à coopérer avec un écrou 165. Un ressort hélicoïdal 166, centré par le bras arrière, appuie, d'un côté, contre une paroi interne du boîtier et, de l'autre côté, contre l'écrou 165. En conséquence, le vissage de l'écrou 165 sur le filetage 164a du bras arrière 164 comprime le ressort 166 qui transmet l'effort de compression sur la paroi interne du boîtier 110. Ainsi, le boîtier pivote autour de l'axe X153 de l'arbre avant 153 de manière à rapprocher l'arrière du boîtier 10 du rail 50. Ce mouvement est limité par la roue de friction 140 logée entre les deux bras et dont une partie dépasse de la face haute 111 du boîtier, grâce à une fente 112 ménagée sur cette face. En effet, cette roue de friction, qui tourne autour de l'axe X141 matérialisé par un arbre 141 solidaire du boîtier, vient en appui contre les surfaces de roulement 53 et 54 du rail, bloquant ainsi le pivotement du boîtier autour de l'axe X153. Ainsi, les éléments 164, 165 et 166 et la face interne du boîtier 110 constituent ensemble le moyen presseur de la roue 140 contre les surfaces de roulement 53 et 54.Unlike the front arm 154, the second rear arm 164 is not fixed directly to the housing 110. This rear arm 164 passes through a wall of the housing. It comprises a thread 164a at one end so as to cooperate with a nut 165. A helical spring 166, centered by the rear arm, presses, on one side, against an inner wall of the housing and, on the other side, against the nut 165. Accordingly, the screwing of the nut 165 on the thread 164a of the rear arm 164 compresses the spring 166 which transmits the compressive force on the inner wall of the housing 110. Thus, the housing pivots around the X axis 153 of the front shaft 153 so as to bring the rear of the housing 10 of the rail 50. This movement is limited by the friction wheel 140 housed between the two arms and a portion of which exceeds the upper face 111 of the housing, thanks to a slot 112 formed on this face. Indeed, this friction wheel, which rotates about the axis X 141 materialized by a shaft 141 integral with the housing, abuts against the rolling surfaces 53 and 54 of the rail, thus blocking the pivoting of the housing around the X axis 153 . Thus, the elements 164, 165 and 166 and the internal face of the housing 110 together constitute the pressing means of the wheel 140 against the running surfaces 53 and 54.

La variation de l'effort de compression du ressort 166 permet de faire varier l'effort de contact entre la roue de friction 140 et les surfaces de roulement 53 et 54. Cet effort de contact résulte d'un double contact qui s'exerce, d'une part, entre les roues de guidages 151, 152, 161 et 162 et les pistes 51, 52 du rail 50 et, d'autre part, entre une portion de la périphérie de la roue de friction 140 et les surfaces de roulement 53, 54. L'intensité de l'effort de contact exercé par la roue de friction 140 dépend de sa position par rapport au rail 50. Sa position varie en fonction de l'angle de pivotement du boîtier par rapport à l'axe X153. Le moyen presseur 110-164-165-166 permet de régler cet angle, et donc de modifier directement l'effort de contact. L'angle de pivotement ou la variation de position de la roue par rapport au rail est faible. En effet, en fonctionnement, la roue de friction est continuellement en contact avec le rail. Or, c'est l'écrasement de la roue contre les surfaces de roulement qui génère l'augmentation de l'effort de contact. En conséquence, la hauteur d'écrasement définit l'angle de pivotement et la variation de position de la roue par rapport au rail. La roue est de préférence en matière relativement souple ce qui permet d'accroître la hauteur d'écrasement et d'augmenter la surface de contact.The variation of the compression force of the spring 166 makes it possible to vary the contact force between the friction wheel 140 and the running surfaces 53 and 54. This contact force results from a double contact which is exerted, on the one hand, between the guide wheels 151, 152, 161 and 162 and the tracks 51, 52 of the rail 50 and, on the other hand, between a portion of the periphery of the friction wheel 140 and the rolling surfaces. 53, 54. The intensity of the contact force exerted by the friction wheel 140 depends on its position relative to the rail 50. Its position varies as a function of the pivot angle of the housing with respect to the X axis 153 . The pressing means 110-164-165-166 makes it possible to adjust this angle, and thus to directly modify the contact force. The pivot angle or the variation of position of the wheel relative to the rail is low. Indeed, in operation, the friction wheel is continuously in contact with the rail. However, it is the crushing of the wheel against the rolling surfaces that generates the increase in the contact force. As a result, the crush height defines the pivot angle and the position variation of the wheel relative to the rail. The wheel is preferably relatively flexible material which increases the crush height and increase the contact surface.

Par ailleurs, le boîtier 110 comprend une première oreille 113, à l'avant du chariot et une deuxième oreille 114, à l'arrière du chariot. Ces deux oreilles permettent l'accroche des crochets non représentés et fixés sur le haut du premier pan P11 du rideau.Furthermore, the housing 110 comprises a first lug 113, at the front of the carriage and a second lug 114, at the rear of the carriage. These two ears allow the hooking hooks not shown and fixed on the top of the first pan P11 of the curtain.

Avec le dispositif décrit précédemment, l'effort de contact doit être réglé pour pouvoir entraîner la masse totale du rideau 10 équipé des chariots support 20, c'est à dire, la charge à tracter à la fin d'un déplacement de rideau. Une fois réglé, cet effort ne varie pas au cours du mouvement. Ainsi, au début d'un mouvement du rideau, l'effort de contact est plus fort que nécessaire. Or, comme la consommation électrique du moteur est directement proportionnelle à cet effort de contact, celle-ci est pénalisée pendant la plus grande partie de la course du rideau.With the device described above, the contact force must be adjusted to be able to drive the total mass of the curtain 10 equipped with support carriages 20, this is at say, the load to tow at the end of a curtain move. Once set, this effort does not vary during the movement. Thus, at the beginning of a movement of the curtain, the contact force is stronger than necessary. Since the electrical consumption of the motor is directly proportional to this contact force, it is penalized during most of the curtain stroke.

Les figures 4 à 6 représentent un premier mode de réalisation de l'invention. La structure globale du chariot motorisé 100b est similaire à celle du chariot motorisé 100 de l'art antérieur décrit précédemment, à l'exception du moyen presseur. Les éléments du chariot motorisé selon ce mode de réalisation sont référencés par les mêmes numéros que ceux du chariot motorisé de l'art antérieur auxquels on ajoute l'indice « b ». Les éléments identiques à ceux des figures 1 à 3 ne sont pas décrits en détail. Le chariot 100b comprend un moteur et une transmission non représentés et analogues aux éléments 130 et 135 qui entraînent en rotation une roue de friction 140b.The Figures 4 to 6 represent a first embodiment of the invention. The overall structure of the motorized trolley 100b is similar to that of the motorized trolley 100 of the prior art described above, with the exception of the pressing means. The elements of the motorized carriage according to this embodiment are referenced by the same numbers as those of the motorized carriage of the prior art to which the index "b" is added. Elements identical to those of Figures 1 to 3 are not described in detail. The carriage 100b comprises a motor and a transmission not shown and similar to the elements 130 and 135 which rotate a friction wheel 140b.

Dans ce mode de réalisation, le moyen presseur de la roue de friction 140b sur les surfaces de roulement 53 et 54 du rail 50 est réalisé par un dispositif d'accroche arrière du chariot motorisé 100b. Ainsi, le bras arrière de suspension 164b du chariot 100b comprend une extrémité similaire à celle du bras arrière 164 au niveau du rail mais diffère à son autre extrémité.In this embodiment, the pressing means of the friction wheel 140b on the running surfaces 53 and 54 of the rail 50 is formed by a rear attachment device of the motorized trolley 100b. Thus, the rear suspension arm 164b of the carriage 100b includes an end similar to that of the rear arm 164 at the rail but differs at its other end.

Du côté du rail 50, le bras arrière 164b est relié à un arbre arrière 163b supportant deux roues arrières de guidage 161b et 162b. Le bras arrière 164b sert donc à supporter le chariot 100b sous le rail 50, comme le bras arrière 164 du chariot 100, en coopération avec un bras avant 154b identique au bras avant 154. Les roues de guidage 151b, 152b, 161b et 162b, montées tournantes autour d'axes X153b et X163b en partie haute des bras 154b et 164b, servent à la fois à suspendre le chariot 100b et à le guider le long du rail 50.On the side of the rail 50, the rear arm 164b is connected to a rear shaft 163b supporting two rear guide wheels 161b and 162b. The rear arm 164b thus serves to support the carriage 100b under the rail 50, as the rear arm 164 of the carriage 100, in cooperation with a front arm 154b identical to the front arm 154. The guide wheels 151b, 152b, 161b and 162b, mounted rotating about axes X 153b and X 163b in the upper part of the arms 154b and 164b, serve both to suspend the carriage 100b and to guide it along the rail 50.

De l'autre côté, le bras arrière 164b est articulé sur une oreille 115b solidaire du boîtier 110b du chariot motorisé 100b, autour d'un axe X167b matérialisé par un deuxième arbre 167b. En conséquence, le bras arrière 164b peut pivoter autour de l'axe X167b qui est parallèle aux axes des roues de guidage 151b, 152b, 161b et 162b et perpendiculaire à la direction de déplacement du chariot 100b le long du rail 50. Par ailleurs, le bras arrière 164b supporte une oreille 114b destinée à l'accroche d'un crochet, non représenté et fixé sur le haut du premier pan P11 du rideau.On the other side, the rear arm 164b is hinged to an ear 115b secured to the housing 110b of the motorized trolley 100b, about an axis X 167b materialized by a second shaft 167b. Consequently, the rear arm 164b can pivot about the X axis 167b which is parallel to the axes of the guide wheels 151b, 152b, 161b and 162b and perpendicular to the direction of travel of the carriage 100b along the rail 50. Moreover, , the rear arm 164b supports an ear 114b for hooking a hook, not shown and fixed on the top of the first panel P11 of the curtain.

Le principe de variation de l'effort de contact en fonction de l'évolution de la charge tractée ou poussée par le chariot lors de son déplacement est illustré par les figures 4 à 6.The principle of variation of the contact force as a function of the evolution of the load pulled or pushed by the carriage during its displacement is illustrated by the Figures 4 to 6 .

La figure 4 représente la position du chariot motorisé 100b au repos. Le bras arrière 164b est en position verticale, son axe longitudinal A164b étant confondu avec une droite verticale D coupant l'axe X167b. Les axes X153b et X163b des deux paires de roues de guidage 151b/152b et 161b/162b sont espacées d'une distance E1b, le long du rail 50. La roue de friction 140b exerce un effort de contact FR réparti sur les surfaces de roulement 53 et 54.The figure 4 represents the position of the motorized carriage 100b at rest. The rear arm 164b is in a vertical position, its longitudinal axis A 164b coinciding with a vertical line D intersecting the X axis 167b . The axes X 153b and X 163b of the two pairs of guide wheels 151b / 152b and 161b / 162b are spaced a distance E 1b , along the rail 50. The friction wheel 140b exerts a contact force F R distributed over running surfaces 53 and 54.

La figure 5 illustre la fermeture du rideau. Le chariot 100b se déplace dans le sens de la flèche F1. La roue de friction 140b roule le long des surfaces de roulement 53 et 54 en tournant autour d'un axe X141b, provoquant ainsi le déplacement du chariot 100b qui entraîne, à son tour, le rideau via l'oreille 114b. Au fur et à mesure que la masse de rideau tractée MT augmente, l'effort résistant RT au déplacement du chariot 100b augmente, le bras arrière 164b tourne, dans le sens horaire à la figure 5 autour de l'axe de pivotement X167b. Cette rotation fait augmenter la valeur d'un angle α défini entre la droite verticale D coupant l'axe X167b et l'axe longitudinal A164b du bras arrière 164b. Le bras arrière 164b est alors au-delà de la droite D par rapport au boîtier 110b du chariot 100b.The figure 5 illustrates the closing of the curtain. The carriage 100b moves in the direction of the arrow F 1 . The friction wheel 140b rolls along the rolling surfaces 53 and 54 by rotating about an X axis 141b , thereby causing the carriage 100b to move, which in turn drives the curtain via the lug 114b. As the towed curtain mass M T increases, the resisting force R T to the displacement of the carriage 100b increases, the rear arm 164b rotates, clockwise to the figure 5 around the pivot axis X 167b . This rotation increases the value of an angle α defined between the vertical line D intersecting the X axis 167b and the longitudinal axis A 164b of the rear arm 164b. The rear arm 164b is then beyond the line D with respect to the housing 110b of the carriage 100b.

Cette rotation provoque, d'une part, l'écartement des deux paires de roues 151b/152b et 161b/162b l'une part rapport à l'autre et, d'autre part, le pivotement du boîtier 110b autour de l'axe X153b, dans le sens anti-horaire représenté par la flèche F2. La distance entre les axes de rotation X153b et X163b des paires de roues de guidage augmente jusqu'à une valeur E2b supérieure à la valeur E1b. Le chariot 100b passe ainsi de la configuration représentée par le boîtier 110b en pointillés à la configuration en traits pleins à la figure 5.This rotation causes, on the one hand, the spacing of the two pairs of wheels 151b / 152b and 161b / 162b relative to each other and, on the other hand, the pivoting of the housing 110b around the axis X 153b , anti-clockwise represented by the arrow F 2 . The distance between the axes of rotation X 153b and X 163b of the pairs of guide wheels increases to a value E 2b greater than the value E 1b . The carriage 100b thus passes from the configuration represented by the box 110b in dashed lines to the configuration in solid lines at the figure 5 .

Ces mouvements ont pour conséquence le rapprochement de l'axe X141b de rotation la roue de friction 140b et du rail 50 et donc l'augmentation de l'effort FT de contact entre la roue de friction et les surfaces de roulement 53 et 54. L'augmentation de cet effort de contact permet l'augmentation de l'effort de tractage du chariot motorisé 100b. Avec ce mécanisme, l'effort de contact s'ajuste à l'effort de tractage nécessaire pour déplacer une masse MT de rideau définie et vaincre l'effort résistant RT correspondant. Ainsi, lors de la fermeture de l'écran, l'effort de contact s'auto-ajuste, notamment en fonction de l'évolution de la masse de rideau à tracter. La consommation du moteur est alors optimisée.These movements result in the approximation of the axis X 141b of rotation the friction wheel 140b and the rail 50 and therefore the increase of the force F T of contact between the friction wheel and the running surfaces 53 and 54 The increase in this contact force makes it possible to increase the towing force of the motorized trolley 100b. With this mechanism, the contact force is adjusted to the towing force required to move a mass defined curtain M T and overcome the corresponding resistant force R T. Thus, when closing the screen, the contact force self-adjusts, in particular according to the evolution of the curtain mass to tow. The consumption of the engine is then optimized.

La figure 6 illustre l'ouverture du rideau. Le principe de fonctionnement est analogue à celui de la fermeture du rideau. La roue de friction 140b roule le long des surfaces de roulement 53 et 54, provoquant ainsi le déplacement dans le sens de la flèche F3 du chariot 100b qui pousse, à son tour, le rideau via l'oreille 114b. Au fur et à mesure que la masse MT de rideau poussée MP augmente l'effort résistant RP augmente et le bras arrière 164b tourne, dans le sens anti-horaire autour de l'axe de pivotement X167b. Cette rotation fait augmenter la valeur absolue d'un angle β défini entre la droite D et l'axe A164b. Le bras arrière 164b est alors entre la droite D et le boîtier 110b.The figure 6 illustrates the opening of the curtain. The operating principle is similar to that of closing the curtain. The friction wheel 140b rolls along the tread surfaces 53 and 54, thereby causing movement in the direction of the arrow F 3 of the carriage 100b which pushes, in turn, the curtain via the ear 114b. As the mass M T pushed curtain M P increases the resistive force R P increases and the rear arm 164b rotates, anti-clockwise around the pivot axis X 167b . This rotation increases the absolute value of an angle β defined between the line D and the axis A 164b . The rear arm 164b is then between the line D and the housing 110b.

Cette rotation provoque, d'une part, le rapprochement des deux paires de roues de guidage 151b/152b et 161b/162b et, d'autre part, le pivotement du boîtier 110b autour de l'axe X153b, dans le sens anti-horaire représenté par la flèche F2. La distance entre les axes X153b et X163b diminue alors jusqu'à une valeur E3b inférieure à la valeur E1b. Le chariot 100b passe de la configuration représentée par le boîtier 110b en pointillés à la configuration en traits pleins à la figure 6. Ces mouvements ont pour conséquence le rapprochement de l'axe X141b de rotation de la roue de friction 140b et du rail 50 et donc l'augmentation de l'effort FP de contact entre la roue de friction et les surfaces de roulement. L'effort de contact s'auto-ajuste alors de la même manière que précédemment.This rotation causes, on the one hand, the approximation of the two pairs of guide wheels 151b / 152b and 161b / 162b and, on the other hand, the pivoting of the casing 110b about the axis X 153b , in the anti- rotation direction. time represented by the arrow F 2 . The distance between the axes X 153b and X 163b then decreases to a value E 3b less than the value E 1b . The carriage 100b changes from the configuration represented by the dotted box 110b to the solid line configuration at the figure 6 . These movements result in the approximation of the axis X 141b of rotation of the friction wheel 140b and the rail 50 and therefore the increase of the force F P of contact between the friction wheel and the running surfaces. The contact force then self-adjusts in the same way as before.

Les figures 7 et 8 représentent un deuxième mode de réalisation de l'invention. La structure du chariot motorisé 100c est similaire à celle du chariot motorisé 100 de l'art antérieur décrit précédemment, à l'exception du moyen presseur. Les éléments du chariot motorisé selon ce mode de réalisation sont référencés par les mêmes numéros du chariot motorisé de l'art antérieur auxquels on ajoute l'indice « c ». Les éléments identiques à ceux des figures 1 à 3 ne sont pas décrits en détail. Le chariot 100c comprend un moteur et une transmission non représentés et analogues aux éléments 130 et 135 qui entraînent en rotation une roue de friction 140b.The Figures 7 and 8 represent a second embodiment of the invention. The structure of the motorized trolley 100c is similar to that of the motorized trolley 100 of the prior art described above, with the exception of the pressing means. The elements of the motorized trolley according to this embodiment are referenced by the same numbers of the motorized trolley of the prior art to which the index "c" is added. Elements identical to those of Figures 1 to 3 are not described in detail. The carriage 100c comprises a motor and a transmission not shown and similar to the elements 130 and 135 which rotate a friction wheel 140b.

Le moyen presseur de la roue de friction 140b sur les surfaces de roulement 53 et 54 du rail 50 est également réalisé par un dispositif d'accroche arrière du chariot motorisé 100c. Le bras arrière de suspension 164c du chariot 100c comprend une extrémité similaire à celle du bras arrière 164 au niveau du rail mais diffère à son autre extrémité.The pressing means of the friction wheel 140b on the running surfaces 53 and 54 of the rail 50 is also formed by a rear attachment device of the motorized trolley 100c. The rear suspension arm 164c of the carriage 100c has an end similar to that of the rear arm 164 at the rail but differs at its other end.

Du côté du rail 50, le bras arrière 164c est relié à un arbre arrière 163c supportant deux roues arrière de guidage 161c et 162c. Les roues arrière 161c et 162c servent également à suspendre le chariot 100c sous le rail 50, en conjonction avec les roues avant 151c et 152c montées tournante à l'extrémité supérieure d'un bras avant de suspension 154c identique au bras avant 154.On the side of the rail 50, the rear arm 164c is connected to a rear shaft 163c supporting two rear guide wheels 161c and 162c. The rear wheels 161c and 162c also serve to suspend the carriage 100c under the rail 50, in conjunction with the front wheels 151c and 152c rotatably mounted at the upper end of a front suspension arm 154c identical to the front arm 154.

En partie médiane, le bras arrière 164c porte un pion 168c s'étendant selon une direction parallèle aux axes X153c et X163c de rotation des roues de guidage. Ce pion coopère avec un chemin de guidage 116c, en forme de « V » inversé, ménagé sur une oreille 115c solidaire du boîtier 110c du chariot motorisé 100c. En pratique, le chemin de guidage 116c est formé par une lumière découpée dans l'oreille 115c. Avantageusement, le bras comprend deux pions, disposés de part et d'autre du bras. Dans ce cas, le boîtier est solidaire de deux oreilles 115c intégrant chacune, un chemin de guidage associé à chaque pion. Par ailleurs, le bras arrière 164c se prolonge, à l'opposé des roues arrière 161c, 162c par une oreille 114c destinée à l'accroche d'un crochet non représenté fixé sur le haut du premier pan P11 du rideau.In the middle part, the rear arm 164c carries a pin 168c extending in a direction parallel to the axes X 153c and X 163c of rotation of the guide wheels. This pin cooperates with a guide path 116c, inverted "V" formed on an ear 115c integral with the housing 110c of the motorized carriage 100c. In practice, the path of 116c is formed by a light cut into the ear 115c. Advantageously, the arm comprises two pins, arranged on either side of the arm. In this case, the housing is secured to two lugs 115c each incorporating a guide path associated with each peg. Furthermore, the rear arm 164c extends, opposite the rear wheels 161c, 162c by an ear 114c for hooking a hook not shown attached to the top of the first panel P11 of the curtain.

Tout comme le premier mode de réalisation, l'ajustement de l'effort de contact entre la roue de friction et la surface de roulement est obtenu en faisant varier l'écartement entre les deux paires de roues 151c/152c et 161c/162c.Like the first embodiment, the adjustment of the contact force between the friction wheel and the running surface is obtained by varying the spacing between the two pairs of wheels 151c / 152c and 161c / 162c.

La figure 7 représente la position du chariot motorisé 100c au repos. Le pion 168c se situe en haut et au milieu du chemin de guidage 116c en forme de « V » inversé. Les deux paires de roues 151c/152c et 161c/162c sont espacées d'une distance E1c. La roue de friction 140c exerce un effort FR réparti sur les surfaces de roulement 53 et 54.The figure 7 represents the position of the motorized carriage 100c at rest. The pin 168c is located at the top and in the middle of the inverted "V" shaped guide track 116c. The two pairs of wheels 151c / 152c and 161c / 162c are spaced apart by a distance E 1c . The friction wheel 140c exerts a force F R distributed on the running surfaces 53 and 54.

La figure 8 illustre la fermeture du rideau. La roue de friction roule le long des surfaces de roulement en tournant autour d'un axe X141c, provoquant ainsi le déplacement du chariot 100c dans le sens de la flèche F1, ce qui entraîne le rideau via l'oreille 114c. Au fur et à mesure que la masse de rideau tractée MT augmente l'effort résistant RT augmente et le bras arrière 164c se déplace horizontalement dans la direction inverse du déplacement du chariot. Le déplacement du chariot 100c par rapport à l'oreille 114c est une translation le long d'une des branches rectilignes du chemin de guidage 116c. Le chemin 116c constitue donc une came de guidage du bras arrière 164c, par l'intermédiaire du pion 168c. Ce mouvement provoque ainsi l'écartement des deux paires de roues 151c/152c et 161c/162c qui arrivent dans une position où leurs axes de rotation X153c et X163c sont écartés d'une distance E2c supérieure à la distance E1c. En même temps, grâce à la coopération entre le pion 168c et le chemin de guidage 116c, cette translation entraîne le pivotement du boîtier 110c autour de l'axe X153c, dans le sens de la flèche F2. Le chariot 100c passe ainsi de la configuration représentée par le boîtier 110b en pointillés à la configuration en traits pleins à la figure 8. Comme pour le mode de réalisation précédent, ces mouvements ont pour conséquence le rapprochement de l'axe X141c de rotation de la roue de friction vers le rail et donc l'augmentation de l'effort FT de contact entre la roue de friction 140c et les surfaces de roulement 53 et 54. L'effort de contact s'auto-ajuste alors de la même manière.The figure 8 illustrates the closing of the curtain. The friction wheel rolls along the running surfaces by rotating about an X axis 141c , thereby causing the carriage 100c to move in the direction of the arrow F 1 , which causes the curtain via the ear 114c. As the towed curtain mass M T increases the load resistance R T increases and the rear arm 164c moves horizontally in the direction opposite to the movement of the carriage. The displacement of the carriage 100c relative to the ear 114c is a translation along one of the rectilinear branches of the guide path 116c. The path 116c therefore constitutes a guide cam of the rear arm 164c, via the pin 168c. This movement thus causes the spacing of the two pairs of wheels 151c / 152c and 161c / 162c arriving at a position where their axes of rotation X 153c and X 163c are spaced apart by a distance E 2c greater than the distance E 1c . At the same time, thanks to the cooperation between the pin 168c and the guide path 116c, this translation causes the casing 110c to pivot about the axis X 153c , in the direction of the arrow F 2 . The carriage 100c thus passes from the configuration represented by the box 110b in dashed lines to the configuration in solid lines at the figure 8 . As for the previous embodiment, these movements result in the approximation of the axis X 141c of rotation of the friction wheel towards the rail and therefore the increase of the force F T of contact between the friction wheel 140c and the running surfaces 53 and 54. The contact force then self-adjusts in the same way.

Pour l'ouverture du rideau, le raisonnement est le même sauf que les deux paires de roues 151c/152c et 161c/162c se rapprochent. Le pion coopère alors avec l'autre branche du « V » inversé, d'une façon comparable à ce qui est décrit en référence à la figure 6 pour le premier mode de réalisation.For the opening of the curtain, the reasoning is the same except that the two pairs of wheels 151c / 152c and 161c / 162c are getting closer. The pawn then cooperates with the other inverted "V" branch in a manner comparable to that described with reference to the figure 6 for the first embodiment.

En variante des modes de réalisation décrits précédemment, l'effort de contact FR entre la roue de friction 140b ou 140c et les surfaces de roulement 53 et 54 en position de repos peut être réglable. Par exemple, on peut prévoir un moyen ajustant la hauteur d'un des bras de suspension 154b, 164b, 154c ou 164c reliés aux roues de guidage. On peut également transposer la solution de réglage de l'art antérieur décrite aux figures 2 et 3.As a variant of the embodiments described above, the contact force F R between the friction wheel 140b or 140c and the running surfaces 53 and 54 in the rest position can be adjustable. For example, one can provide a means adjusting the height of one of the suspension arms 154b, 164b, 154c or 164c connected to the guide wheels. It is also possible to transpose the adjustment solution of the prior art described in Figures 2 and 3 .

Pour ramener le chariot dans une position d'équilibre ou de repos, les solutions décrites consistent à utiliser l'effort de réaction généré suite à la compression de la roue de friction contre les surfaces de roulement. Alternativement, il peut être prévu des moyens de rappel, tels qu'un ou plusieurs ressorts, permettant de ramener l'organe mobile du moyen presseur vers une position d'équilibre.To bring the carriage back to a position of equilibrium or rest, the solutions described consist in using the reaction force generated following the compression of the friction wheel against the running surfaces. Alternatively, it may be provided return means, such as one or more springs, for bringing the movable member of the pressing means to an equilibrium position.

Quel que soit le mode de réalisation ou la variante considéré, le moyen presseur du chariot permet de tenir compte de l'évolution du poids de la partie tractée ou poussée du rideau, donc de l'évolution de la charge, en ajustant en conséquence l'effort de contact. En effet, plus le poids du rideau est élevé, plus l'effort résistant augmente et plus le bras mobile 164b, 164c ou équivalent est déplacé, par rapport au boîtier 110b ou 110c et à partir de sa position de repos, ce qui induit une augmentation correspondante de l'effort de contact.Whatever the embodiment or the variant considered, the pressing means of the carriage makes it possible to take account of the evolution of the weight of the towed or pushed part of the curtain, and therefore of the evolution of the load, by adjusting accordingly the contact force. Indeed, the higher the weight of the curtain, the more the resistant force increases and the movable arm 164b, 164c or equivalent is displaced relative to the housing 110b or 110c and from its rest position, which induces a corresponding increase in contact force.

Dans les deux modes de réalisation décrits ci-dessus, le moteur d'entraînement de la roue de friction 140b ou 140c est alimenté à partir d'une source d'énergie autonome, analogue à la source 120 représentée à la figure 2, par exemple un ensemble de piles.In the two embodiments described above, the drive motor of the friction wheel 140b or 140c is fed from an autonomous power source, similar to the source 120 shown in FIG. figure 2 for example a set of batteries.

De même, il est décrit que l'extrémité haute avant du rideau est accrochée au bras arrière du chariot. Pour des raisons esthétiques, cette extrémité haute du rideau peut également être accrochée au boîtier du chariot de manière à le masquer. Ainsi, une oreille peut s'étendre à l'avant du chariot de manière analogue à l'oreille 113 dans l'art antérieur. Cependant, il faut prévoir un jeu de fonctionnement entre l'oreille d'accrochage avant liée au boîtier et l'oreille d'accrochage arrière liée au bras arrière.Similarly, it is described that the front high end of the curtain is hooked to the rear arm of the carriage. For aesthetic reasons, this high end of the curtain can also be attached to the carriage housing so as to hide it. Thus, an ear can extend to the front of the carriage analogously to the ear 113 in the prior art. However, it is necessary to provide an operating clearance between the front attachment hook attached to the housing and the rear hooking lug connected to the rear arm.

L'invention est décrite dans le cas où la zone de friction 140b ou 140c coopère avec deux surfaces de roulement 53 et 54. Elle s'applique également dans le cas où cette zone coopère avec une seule surface de roulement. L'invention n'est pas limitée aux modes de réalisation décrit. D'autres solutions peuvent être envisagées pour faire varier l'effort de contact en fonction de l'évolution de la charge tractée ou poussée par le chariot lors de son déplacement. De même, l'évolution de l'effort de contact peut être obtenue par simple translation du boîtier du chariot, et plus particulièrement de la roue de friction, vers le rail au lieu de le faire pivoter autour d'un axe.The invention is described in the case where the friction zone 140b or 140c cooperates with two running surfaces 53 and 54. It also applies in the case where this zone cooperates with a single running surface. The invention is not limited to the embodiments described. Other solutions may be envisaged to vary the contact force depending on the evolution of the load pulled or pushed by the carriage during its movement. Similarly, the evolution of the contact force can be obtained by simple translation of the housing of the carriage, and more particularly of the friction wheel, towards the rail instead of rotating it about an axis.

L'invention peut également s'adapter à des chariots se déplaçant le long d'autres types de rail ayant un profil différent. Le rail doit ainsi être considéré comme un support de guidage du chariot, sa forme important peu. Le rail peut être une tringle de section circulaire tronquée par un méplat sur sa partie inférieure de manière à former la piste de roulement pour la roue de friction. Pour ce mode de réalisation, le rideau est accroché à des anneaux entourant la tringle quasi-circulaire.The invention can also be adapted to carriages moving along other types of rail having a different profile. The rail must thus be considered as a support for guiding the carriage, its important shape little. The rail may be a circular section rod truncated by a flat portion on its lower part so as to form the raceway for the friction wheel. For this embodiment, the curtain is attached to rings surrounding the quasi-circular rod.

Dans cette description, la notion de « charge » doit se comprendre au sens large, incluant également les effets liés à une variation de charge comme par exemple l' « inertie » de l'écran lors de son déplacement. Ainsi, l'invention couvre aussi les panneaux coulissant horizontalement. Dans ce mode de réalisation, le principe de fonctionnement est inversé. Au début du mouvement, l'effort à fournir est important puisque le chariot doit mettre en mouvement le panneau mobile. Par contre, une fois l'écran entraîné, l'effort à fournir diminue grâce à l'inertie du panneau. Un chariot reprenant le principe de l'invention permet donc d'adapter son besoin énergétique en fonction du mouvement du panneau.In this description, the concept of "load" must be understood in the broad sense, including also the effects related to a load variation such as the "inertia" of the screen during its displacement. Thus, the invention also covers horizontally sliding panels. In this embodiment, the operating principle is reversed. At the beginning of the movement, the effort to be supplied is important since the carriage must set in motion the movable panel. On the other hand, once the screen is driven, the effort to be supplied decreases thanks to the inertia of the panel. A carriage incorporating the principle of the invention therefore makes it possible to adapt its energy requirement as a function of the movement of the panel.

Claims (8)

  1. Motorised carriage (100b) for opening/closing a screen (10), with this carriage able to move along a rail (50) thanks to a friction wheel (140b) driven in rotation by a motor and in contact with at least one running surface (53, 54) of the rail, the motorised carriage comprising at least two pairs of guide wheels (151b, 152b, 161b, 162b) running on tracks (51, 52) of the rail (50), the contact force (F) between the friction wheel and the running surface being adjustable by a presser means (164b) comprising an arm (164b) kinetically connected to a case (110b) of the carriage (100b) which houses the friction wheel (140b), whereas one (161b, 162b) of the two pairs of guide wheels is supported by the arm (164b), the arm being mobile in relation to the case (110b) between a first at rest position, where it imposes on the case a first position in relation to the rail (50) such that the contact force has a first value (FR), and at least one second position of movement (F1, F3), where it imposes on the case a second position in relation to the rail such that the contact force has a second value (FT, FP), the presser means (164b) making it possible to vary the contact force (FR, FT, FP) according to a resistive force (RT, RP) which depends on the change in the load (MT, MP) pulled or pushed by the carriage (100b) as it moves (F1, F3), characterised in that the variation of the contact force (FR, FT, FP) occurs due to a pivoting of the arm (164b) with respect to the case (110b) in a direction of modification of the separation (E1b, E2b, E3b) of the axes of rotation (X153b, X163b) of the two pairs of guide wheels by varying the contact force (FR, FT, FP) when the arm (164b) passes from its first position to its second position, or reciprocally, the arm being pivotally mobile with respect to the case.
  2. Motorised carriage (100c) for opening/closing a screen (10), with this carriage able to move along a rail (50) thanks to a friction wheel (140c) driven in rotation by a motor and in contact with at least one running surface (53, 54) of the rail, the motorised carriage comprising at least two pairs of guide wheels (151c, 152c, 161c, 162c) running on tracks (51, 52) of the rail (50), the contact force (F) between the friction wheel and the running surface being adjustable by a presser means (164c), the presser means comprising an arm (164c) kinetically connected to a case (110c) of the carriage (100c) which houses the friction wheel (140c), whereas one (161c, 162c) of the two pairs of guide wheels is supported by the arm (164c), the arm being mobile in translation with respect to the case (110c) between a first at rest position, where it imposes on the case a first position in relation to the rail (50) such that the contact force has a first value (FR), and at least one second position of movement (F1), where it imposes on the case a second position in relation to the rail such that the contact force has a second value (FT), and the presser means (164c) making it possible to vary the contact force (FR, FT) according to a resistive force (RT, RP) which depends on the change in the load (MT, MP) pulled or pushed by the carriage (100c) as it moves (F1), thanks to a translation of the arm (164c) with respect to the case (110c) in a direction of modification of the separation (E1c, E2c) of the axes of rotation (X153c, X163c) of the two pairs of guide wheels by varying the contact force (FR, FT) when the arm (164c) passes from its first position to its second position, or reciprocally, characterised in that the mobile arm (164c) of the presser means is in contact with a in contact with a guide came (116c) making it possible to modify the position of the presser means in relation to the running surface (53, 54).
  3. Motorised carriage according to one of claims 1 or 2 characterised in that the presser means (164c; 164d) makes it possible to modify the distance between the axis (X141b; X141c) of rotation of the friction wheel and the running surface (53, 54) of the rail.
  4. Motorised carriage according to one of the preceding claims characterised in that the case (110b; 110c) pivots around an axis (X153b; X153c) parallel to the axis (X141b; X141c) of rotation of the friction wheel.
  5. Motorised carriage according to claim 4 characterised in that the pivoting axis (X153b; X153c) of the case (110b, 110c) is confounded with the axis of rotation of the wheels (151b, 152b; 151c, 152c) of a pair of guide wheels.
  6. Motorised carriage according to claim 1 characterised in that the mobile arm (164b) of the presser means pivots in relation to the case (110b) about an axis (X167b) parallel to the axis (X141b) of the friction wheel (140b), according to the change in the resistive force (RT, RP).
  7. Motorised carriage according to one of the preceding claims characterised in that a motor for driving the friction wheel (140b, 140c) is powered by an autonomous source of energy (120).
  8. Concealment facility for an opening comprising a rail (50), a motorised carriage (100b, 100c) and a screen (10) hooked to the motorised carriage, characterised in that the carriage (100b, 100c) is according to one of the preceding claims and its friction wheel (140b, 140c) is in contact with at least one running surface (53, 54) of the rail (50) and exerts on this surface a contact force (FR, FT, FP) that varies according to the resistive force (RT, RP).
EP11743303.7A 2010-07-06 2011-07-06 Driving carriage for a motorized curtain and occultation device with such a driving carriage Active EP2590538B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1055472A FR2962317B1 (en) 2010-07-06 2010-07-06 MOTORIZED CURTAIN TROLLEY AND OCCULTATION INSTALLATION COMPRISING SUCH A TROLLEY
PCT/FR2011/051606 WO2012004530A1 (en) 2010-07-06 2011-07-06 Motorized carriage for a curtain, and concealment facility comprising such a carriage

Publications (2)

Publication Number Publication Date
EP2590538A1 EP2590538A1 (en) 2013-05-15
EP2590538B1 true EP2590538B1 (en) 2018-07-04

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EP11743303.7A Active EP2590538B1 (en) 2010-07-06 2011-07-06 Driving carriage for a motorized curtain and occultation device with such a driving carriage

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US (1) US9101239B2 (en)
EP (1) EP2590538B1 (en)
JP (1) JP2013530000A (en)
CN (1) CN103068285B (en)
AU (1) AU2011275581B2 (en)
BR (1) BR112013000223A2 (en)
FR (1) FR2962317B1 (en)
WO (1) WO2012004530A1 (en)

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Publication number Publication date
WO2012004530A1 (en) 2012-01-12
FR2962317B1 (en) 2013-04-05
AU2011275581B2 (en) 2016-08-04
CN103068285B (en) 2016-06-01
BR112013000223A2 (en) 2016-05-31
AU2011275581A1 (en) 2013-01-31
FR2962317A1 (en) 2012-01-13
US9101239B2 (en) 2015-08-11
US20130160955A1 (en) 2013-06-27
JP2013530000A (en) 2013-07-25
CN103068285A (en) 2013-04-24
EP2590538A1 (en) 2013-05-15

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