Motorized carriage for a curtain and concealment facility comprising such a carriage
A motorized carriage for opening/closing a screen moves along a rail by means of a friction wheel that is rotated by a motor and is in contact with at least one running surface of the rail. The contact force between the friction wheel and the running surface can be regulated by a presser means that enables the contact force to be varied according to a resistive force that depends on the load pulled or pushed by the carriage as it moves.
1. A motorized carriage for opening or closing a screen, said motorized carriage moving along a rail using a friction wheel rotatably mounted in a housing suspended to the rail by suspension arms, said friction wheel being driven in rotation around a first axis by a motor and in contact with at least one running surface of the rail, said motorized carriage comprising:
the suspension arms applying a contact force between the friction wheel and the running surface,
wherein one of the suspension arms is movable with respect to the housing and configured to one of increase and decrease the contact force according to a resistive force which depends on the change in the load pulled or pushed by the motorized carriage as it moves, via a rotation of the one suspension arm about an axis parallel to the first axis or a translation of the one suspension arm in a longitudinal direction with respect to the housing.
2. The motorized carriage according to claim 1 ,
wherein
the housing pivots with respect to the rail around a second axis parallel to the first axis.
3. The motorized carriage according to claim 1 further comprising a motor driving the friction wheel powered by an autonomous source of energy.
4. The motorized carriage according to claim 1 further comprising:
at least two pairs of guide wheels running on tracks of the rail,
wherein the suspension arm is kinetically connected to the housing of the carriage and mobile in relation to the latter between a first at rest position, where it imposes on the housing a first location in relation to the rail such that the contact force has a first value, and at least one second position of movement, where it imposes on the housing a second location in relation to the rail such that the contact force has a second value, and
wherein the suspension arm modifies the separation of the axes of rotation of the two pairs of guide wheels by varying the contact force when the arm passes from the first position to at least one of the second positions, or reciprocally.
5. The motorized carriage according to claim 4 wherein the housing pivots around a second axis parallel to the first axis and wherein the pivoting axis of the housing is coextensive with the axis of rotation of the wheels of a pair of guide wheels.
6. The motorized carriage according to claim 4 wherein one of the two pairs of guide wheels is supported by the suspension arm.
7. The motorized carriage according to claim 6 wherein the suspension arm pivots in relation to the housing about an axis parallel to the first axis, according to the change in the resistive force.
8. The motorized carriage according to claim 6 wherein the suspension arm is in contact with a guide cam to modify the position of the suspension arm in relation to the running surface.
9. A concealment facility for an opening comprising:
the rail,
the motorized carriage, and
the screen hooked to the motorized carriage,
wherein the carriage is according to claim 1 and the friction wheel is in contact with at least one running surface of the rail and exerts on the running surface a contact force that varies according to the resistive force.