FR2647152A3 - Disengagement lever for electrical brake motors - Google Patents

Abstract

The invention concerns a lever with automatic blocking for disengaging the brake motors and permitting the manual manoeuvring of the devices driven by the latter, in particular for the roller blinds, shop grilles, etc., comprising a base 2 made of sheet metal of 3 mm thickness supporting the mechanism consisting of an arm 8 of steel integral with a shaft 20 and a toothed wheel 6 itself soldered on the shaft and provided with a catch 7. A cap 1 of sheet metal covers the assembly. The disengagement of the brake motor is ensured by the sheathed cable 10 fixed on a lug 18 soldered on the arm 8 when the user pulls on the handle 9 in the direction (downwards) indicated by the arrow 11. The engagement position is obtained by pressing on the lever 5 which releases the block via the catch.

Description

The present invention relates to an automatic locking lever for disengaging the brake motors, and allowing manual operation of the devices driven by them, in particular for roller shutters, grilles, curtains
This lever is constituted according to Figures I, 2, 3, 4, by a base (2) in sheet metal 3 mm thick, bent at the square on one side supporting the mechanisms, and by a cover in lacquered sheet 0.8 mm thick with slots (23 - 24 - 21) for the passage of operating devices (8 - 5) and the release cable (IO).

The cover is held by two slotted screws (22) positioned by the holes (26)
The mechanism comprises two square steel parts (16 - 25) spot welded to the base (2), in which a steel pin (20) pivots on which a lever arm (8) is welded in flat iron and a quarter gear (6) in steel.

 On the square piece (I6) is fixed a pawl (28) by means of an axis (4) ensuring its mobility; this pawl held by a spring (17) comes to engage via a lug (7) on the toothed wheel (6). The spring (I7) is anchored on the angle piece (I6), one of the angles of which is raised and pierced (FIG. 1, 2, 4).

 The operation of the pawl is ensured by a lever (5) integral with the latter.

On the lever arm (8) is welded a bracket-lug (I8) pierced to receive the target tIO) for disengaging the brake motor maintained by a cable clamp (19); the lever (8) is handled by a plastic handle (9) screwed onto a threaded part (I2) attached by welding.

The lever evolution zone (8) is around 85- (li) which represents a target stroke of 25 mm
The target tension (IO) is adjustable by means of a hollow screw (I4) forming sheath stop (13); this screw runs in the thread made in the base (2); a lock nut (3) blocks the screw after adjustment.

 The base is pierced with holes for fixing to walls, ect.00.

 By pulling according to its evolution zone (II) the cable is stretched and activates the declutching. The pawl (28) taking into account the inclination of the teeth of the wheel (6) prevents the lever from going back, the position n with the engine disengaged "is maintained; the resetting into position" engaged fl is effected by pulling the lever ( 8) while pushing the lever (5); arrows are drawn on the cover to indicate the direction of operation of the levers (8 and 5).

In conclusion, this device allows rapid manual commissioning, in a simple way, by the occupants of a room in the event of a breakdown of the electrical system and also in the event of a disaster, which is not the case for the majority of devices currently in service (a certain physical p # force is necessary to activate them). The simplicity of manufacture and assembly makes it possible to obtain a relatively low cost price for this device t also taking into account its small dimensions which are s Length I20 mm
Width 50 mm
Height 60 mm
Weight 450 g

Claims (5)

 I) Automatic locking lever to disengage the brake motors fitted to shutters such as roller shutters, curtains, grids of the type comprising a square base (2> supporting the mechanisms and a sheet metal cover (I) provided with slots (21-23) - 24) for the passage of the operating devices t5- 8) and the release cable (in).  2) Device according to claim I characterized in that the base (2) is folded square to support the target tension system consisting of a hollow screw (I4) and a locknut (3) which flows through the thread made in the base (2).  3) Device according to claim I characterized in that the mechanism comprises two square-shaped parts (I6- 25) in which pivots a steel axis (20) on which are welded a lever arm in flat iron (8) and a quarter steel gear wheel (6) on which a pawl (28) engages via a lug (7)  4) Device according to claims I and 3 characterized in that the pawl (28) is held on the toothed wheel by a spring (I7) fixed on the raised angle and pierced with the bracket (I6) welded to the base ( 2)  5) Device according to claims I and 3 characterized in that on the lever arm (8) is welded a bracket-lug (18) drilled to receive the declutching target (IO) held by a cable clamp (I9)