DOUBLE ROLL-TYPE CLOSURE

Abstract

A roll type closure has a fixed mounting frame, an inner curtain secured to an inner roller, an outer curtain secured to an external roller rotatably mounted to the inner roller, actuating mechanisms, a bottom rail disposed at the free end of the inner curtain and coupled with the outer roller so as to make the inner and outer rollers integral in rotation, a lever with a hook mounted on the outer roller to move from a retracted position, where the hook does not protrude from the outer roller, to an extracted position, where the hook protrudes from the outer roller, the lever being in the extracted position when the outer curtain is unrolled completely, and a stop member mounted in the frame such that when the lever is in the extracted position the hook is stopped against the stop member, blocking the rotation of the outer roller.

Claims

1. Roll type closure comprising: a fixed mounting frame, an inner roller rotatably mounted to the fixed mounting frame, an inner curtain secured to the inner roller, a tubular hollow outer roller rotatably mounted on the inner roller in such manner that the inner roller and the outer roller are coaxial and rotate independently, the said outer roller being provided with a longitudinal slot for the passage of the inner curtain, an outer curtain secured to the external roller, actuating mechanisms connected to the inner roller in order to drive the inner roller into rotation, a bottom rail disposed at the free end of the inner curtain and adapted to be coupled with the said longitudinal slot of the outer roller, when the inner curtain is rolled completely on the inner roller in such a manner to make the said inner and outer rollers integral in rotation, a lever with a hook mounted on the said outer roller to move from a retracted position, in which the hook does not protrude from the outer roller, to an extracted position, in which the hook protrudes from the outer roller, the said lever being in said extracted position when the said outer curtain is unrolled completely, and a stop member mounted in the said frame in such manner that when the lever is in extracted position the hook is stopped against the said stop member, blocking the rotation of the outer roller.

2. The roll type closure of claim 1, also comprising a spring that leads the said lever to the said extracted position.

3. The roll type closure of claim 2, wherein said lever has a curved shape and is hinged on the said external roller by means of a pin.

4. The roll type closure of claim 3, wherein the said spring is disposed between the said lever and a peg fitted to the said outer roller.

5. The roll type closure of claim 1, also comprising at least one collar, fitted to at least one end of the said outer roller and at least one bearing , disposed between the said inner roller and the said collar.

6. The roll type closure of claim 5, wherein the said lever is fixed to the said collar.

7. The roll type closure of claim 1, wherein the said fixed mounting frame comprises at least one flange disposed in at least one end of the inner roller and outer roller assembly and the said stop member is mounted on the said flange of the fixed mounting frame.

8. The roll type closure of claim 1, wherein the said actuating mechanisms comprise an electrically-operated geared motor.

9. The roll type closure of claim 8, wherein the said internal roller has a tubular hollow shape and the said actuating mechanisms comprise a tubular electrically-operated geared motor adapted to be inserted into the said inner roller.

10. The roll type closure of claim 9, also comprising a first adaptor and a second adaptor disposed between the electrically-operated geared motor and the inner roller, wherein the first adaptor is disposed on the drive shaft of the electrically-operated geared motor and the second adaptor is disposed on a stop ring of the electrically-operated geared motor.

Description

[0035] Further features of the invention will become apparent from the following detailed description, which refers to a merely illustrative, not limiting embodiment, illustrated in the enclosed figures, wherein:

[0036] FIG. 1 is an exploded perspective view of the different elements of the roll type closure in accordance with the invention;

[0037] FIG. 2 is a perspective view from a different direction compared to FIG. 1, showing some partially interrupted, assembled elements and other elements in an exploded view;

[0038] FIG. 3 is a cross-sectional view of the roll type closure of FIG. 1, here assembled, in a situation in which the inner curtain and the outer curtain are rolled completely;

[0039] FIG. 4 is the same view as FIG. 3, in which the outer curtain is unrolled completely and the inner curtain is rolled completely;

[0040] FIG. 5 is the same view as FIG. 4 in which the inner curtain starts being unrolled, and

[0041] FIG. 6 is the same view as FIG. 5, in which the inner curtain is partially unrolled.

[0042] Referring to the figures the roll type closure in accordance with the invention is disclosed, being generally indicated with reference numeral (100).

[0043] The roll type closure assembly (100) comprises an inner roller (1) and an outer roller (2). An inner curtain (O) is attached to the inner roller (1) in order to be rolled and unrolled on the inner roller (1). An outer curtain (T) is attached to the outer roller (2) in order to be rolled on the outer roller (2).

[0044] The outer curtain (T) is normally intended to face the interior of the building and is generally a translucent curtain, which from now on will be called curtain (T). The inner curtain (O) is intended to face the exterior of the building and is generally a black-out blind, which from now on will be called black-out blind (O).

[0045] The inner roller (1) is coaxially inserted into the outer roller (2). For this purpose, the outer roller is a hollow cylindrical tube with a longitudinal slot (20) where the black-out blind (O) passes through.

[0046] The roll type closure assembly (100) comprises a fixed mounting frame comprising a first flange (3) and a second flange (4) intended to be secured to the wall in order to support the different elements of the assembly (100). Each flange (3,4) is shaped like an L plate.

[0047] The first flange (3) comprises a U seat (30) which rotatably supports a pin (50) of an end-cap (5), of substantially cylindrical shape, placed inside the inner roller (1). For this purpose, the end-cap (5) is shaped as a sleeve provided with at least one outer groove (51) and the inner roller (1) is a hollow cylindrical tube provided with at least one rib (10) inwardly protruding, which is intended to be coupled in the groove (51) of the end-cap.

[0048] A first collar (21) and a second collar (22) are secured respectively to a first end and a second end of the outer roller (2). A first bearing (C1) is disposed between the inner roller (1) and the first collar (21). A second bearing (C2) is disposed between the inner roller (1) and the second collar (22). In this manner, the outer roller (2) is rotatably supported on the inner roller (1) and the two rollers (1,2) can rotate freely.

[0049] An electric motor (6) is secured to the second flange (4) and is connected to the inner roller (1) to drive it into rotation. The electric motor (6) comprises a drive shaft (60), a stop ring (64), and a pair of adaptors (61, 62).

[0050] The pair of adaptors (61, 62) comprises a first adaptor (61) and a second adaptor (62). The first adaptor (61) is a power take-off mounted on the drive shaft (60) and the second adaptor (62) is a driving wheel mounted on the stop ring (64). The pair of adaptors (61, 62) has a shape substantially similar to the end cap (5). For that purpose the first and second adaptor (61, 62) are adapted to be inserted into the inner roller (1) and both adaptors (61, 62) comprise at least one groove (63) adapted to accommodate the rib (10) of the inner roller (1).

[0051] The rotating part of the motor (6) is keyed on the inner roller (1) to drive it into rotation. In this manner, the rotation of the drive shaft (60) drives in rotation the first adaptor (61) which in turn drives in rotation the inner roller (1), driving the stop ring (64) through the driving wheel (61) in order to control the revolutions of the drive shaft (60).

[0052] A lever (7) comprises a hook (70). The lever (7) is connected to the outer roller (2) in such manner that the hook (70) protrudes outwards with respect to the outer roller (2). In particular, the lever (7) is connected with the second collar (22) secured at one end of the outer roller (2).

[0053] With reference to FIG. 2, the lever (7) has a curved shape and is pivoted to the second collar (22) by means of a pin (P1) in such manner to act as a lever. In this manner, the lever (7) can rotate around the axis of the pin

[0054] (P1) moving from a retracted position, in which the hook (70) does not protrude from the outer roller tube (2), to an extracted position, in which the hook (70) protrudes from the outer roller (2).

[0055] A peg (P2) is secured to the second collar (22) and a spring (M) is placed between the peg (P2) and the lever (7) in such manner to keep the lever (7) in its extracted position. In FIG. 4 the hook (70) of the lever is shown in extracted position. For this purpose the lever (7) comprises a first hole (71) for accommodating the pin (P1) and a second hole (72) for accommodating one end of the spring (M).

[0056] A stop member (8) is secured to the second flange (4) so that, when in extracted position, the hook (70) of the lever (7) can abut against the stop member (8). The stop member (8) has a curved shape that is substantially similar to that of the hook (70) of the lever. FIGS. 5 and 6 show the hook (70) against the stop member (8).

[0057] With reference to FIGS. 1 and 6, a bottom rail (9) is secured to the free end of the black-out blind (O). With reference to FIG. 3, when the black-out blind (O) is rolled completely in the inner roller (1), the bottom rail is engaged in the longitudinal slot (20) of the outer roller (2), thus making the inner (2) and the outer rollers (1) integral while rotate.

[0058] For this purpose the longitudinal slot (20) of the outer roller is arranged between two longitudinal edges (25, 26) with surfaces lying on a plane. The bottom rail (9) has a substantially T cross-section and comprises a central body (90) which fits in the longitudinal slot (20) and two side wings (91, 92) which abut against the edges (25, 26) of the outer roller (2).

[0059] This description continues with reference to the operation of the double roll type closure (100).

[0060] With reference to FIG. 3, initially, the black-out blind (O) is rolled completely on the inner roller (1) and the bottom rail (9) of the black-out blind is engaged in the longitudinal slot (20) of the outer roller. The curtain (T) is rolled completely on the outer roller (2) and therefore the windings of the curtain (T) press down the lever (7) in its retracted position against the action of the spring (M). In such a case, the hook (70) of the lever is not visible in FIG. 3.

[0061] Furthermore the windings of the curtain (T) also press down the bottom rail (9) in the longitudinal slot (20) of the outer roller, making the inner and the outer rollers integral while rotate. The motor (6) is locked and therefore the inner roller (1) cannot rotate.

[0062] As soon as the motor (6) is unlocked (i.e. the motor (6) is in neutral), if a weight is hung at the free end of the curtain (T), the curtain (T) goes down in the direction of the arrow (Y1) by gravity, causing the unrolling of the curtain (T) and the joined rotation of the outer roller (2) and the inner roller (1) in the direction of the arrow (F1). Alternatively, a rotation of the inner roller (1) in the direction of the arrow (F1) caused by the motor (6) would in any case cause a rotation of the outer roller (2) and the unrolling of the curtain (T).

[0063] When the curtain (T) is not completely unrolled, a rotation of the motor (6) in anticlockwise direction (arrow F1) causes the unrolling of the curtain; on the contrary, a rotation of the motor in clockwise direction (opposite to the arrow F1) causes the rolling of the curtain. The position of the curtain (T) can be adjusted in this way.

[0064] With reference to FIG. 4, when the curtain (T) is completely unrolled, the lever (7) of the outer roller is no longer pressed down by the windings of the curtain (T) and therefore the lever (7) snaps in its extracted position because of the action of the spring (M). In such a situation, the black-out blind (O) is still rolled and the bottom rail (9) is still in the longitudinal slot (20). Therefore a further rotation of the inner roller (1) in the direction of the arrow (F2) also causes a rotation of the outer roller (2) and therefore an approach of the hook (70) of the lever towards the stop member (8) secured with the second flange (4). In such a case the inner roller (1) and the outer roller (2) rotate together and therefore the black-out blind (O) is not unrolled from the inner roller (1).

[0065] With reference to FIG. 5, when the hook (70) of the lever abuts against the stop member (8), the outer roller (2) is locked and the inner roller (1) keeps on rotating in the direction of the arrow (F3). It must be noted how the provision of the lever (7) with the hook (70) and of the stop member (8) ensures the locking of the outer roller and a perfect unrolling of the black-out blind (O), without the need to use complex, unstable and uncertain counterweight systems.

[0066] With reference to FIG. 6, a further rotation of the inner roller (1) in the direction of the arrow (F4) causes the unrolling of the black-out blind (O), and consequently the disengagement of the bottom rail (9) from the longitudinal slot (20) and the lowering of the black-out blind in the direction of the arrow (Y2).

[0067] At this stage, the bottom rail (9) is out of the longitudinal slot (20) and therefore the inner roller (1) and the outer roller (2) are freed in mutual rotation.

[0068] When the black-out blind (O) is not completely rolled, an anticlockwise rotation of the motor (arrow F4) causes the unrolling of the black-out blind; on the contrary a clockwise rotation of the motor (opposite to arrow F4) causes the rolling of the black-out blind. The position of the black-out (O) can be adjusted in this way.

[0069] In order to roll or adjust the position of the curtain (T), the black-out blind must be rolled completely in such manner that the bottom rail (90) is engaged in the longitudinal slot (20) making the inner roller (1) integral with the outer roller (2) in rotation. In such a case a clockwise rotation of the inner roller causes a rotation of the outer roller and consequently the departure of the hook (70) from the stop member (8) and the winding of the curtain (T) on the outer roller (2), bringing the hook (70) to its retracted position.

[0070] Variations and equivalent modifications can be made to the present embodiment of the invention by a person skilled in the art, while still falling within the scope of the invention.

[0071] Although the figures show actuating mechanisms (6) comprising a tubular geared motor, the actuating mechanisms (6) may comprise a chain or a crank handle connected to the inner roller (1).

[0072] Although the drawings show a curtain (T) that is rolled or unrolled on the outer roller (2), the curtain (T) can be a Roman blind that closes like a folding curtain by means of traction exerted on the curtain by cords. In such a case, the cords of the Roman blind are rolled and unrolled on the outer roller tube (2) exactly in the same way in which the curtain (T) is rolled and unrolled.