A friction device for roll-up curtains and the like

E - Fixed Constructions – 06 – B

Patent

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Details

E06B 9/44 (2006.01) E06B 9/60 (2006.01) E06B 9/62 (2006.01)

Patent

CA 2451024

A friction device (10), applied to roll-up curtains and the like, includes a tubular roller (1), on which the curtain (2) rolls up, and which is rotatably carried on a horizontal axis. The friction device (10) includes a threaded shaft (9), situated axially inside the roller (1) and connected to the roller (1) by interposition of an angular speed reducer group (4). A body (11), mounted sliding axially inside the roller (1), is screw-coupled with the threaded shaft (9), so as to translate axially due to the shaft (9) rotation during unrolling or rolling up of the curtain (2) on the roller (1). One or more elastic members (12), subjected to pressure or counter-thrust, are compressed, on opposite ends, between abutment means (13) and a surface of the body 11 and a surface of the body (11), to determine a friction effect, which varies as a function of the rotation direction of the roller (1).

L'invention concerne un dispositif de friction (10) pour rideaux à enroulement et assimilés, comportant un rouleau tubulaire (1) sur lequel le rideau (2) vient s'enrouler et qui est maintenu en rotation sur un axe horizontal. Le dispositif de friction (10) comprend également une tige filetée (9), placée dans l'axe à l'intérieur du rouleau (1) et reliée au rouleau (1) par l'intermédiaire d'un mécanisme de réduction de la vitesse angulaire (4). Un corps (11), monté coulissant dans l'axe à l'intérieur du rouleau (1), est couplé à la tige filetée (9) au moyen de vis, ce qui lui permet d'effectuer un mouvement de translation axial sous l'effet de la rotation de la tige (9), pendant l'enroulement du rideau (2) sur le rouleau (1) ou son déroulement de ce dernier. Un ou plusieurs éléments élastiques (12), soumis à la pression ou à la contre-poussée, sont comprimés, aux extrémités opposées, entre les éléments de butée (13) et une surface du corps (11), afin que soit déterminé un effet de friction, lequel varie en fonction de la direction de rotation du rouleau (1).

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