FR3012509A1 - DEVICE FOR DISRUPTING A STORE. - Google Patents

Abstract

The invention relates to a device for winding a blind for a window, comprising a winding tube (2) on which a fabric (3) is wound or unrolled so that said fabric translates between a retracted position where it is wound on said tube and an occultation position where it is unwound, said winding tube being rotated by means of an electric motor (4), characterized in that the electric motor (4) rotates a motorized shaft (40) which is offset from the roller tube (2) and on which is fixed a first gear (51a), which gear (51a) is engaged with an intermediate gear (71a) disposed below said first wheel , which pinion (71a) is engaged with a second gear (61a) disposed below said pinion, said second wheel (61a) being integral with the winding tube (2), the different gears (51a, 61a) and the pinion (71a) being aligned one below the other others and mounted in rotation on a common support plate (81a).

Description

DEVICE FOR THE WINDING OF A STORE Description Technical field of the invention. The invention relates to a remote device for winding a blind. It also relates to a window incorporating such a winding device. It relates to the technical field of devices for manipulating the fabric of a blind. State of the art The winding devices of a window blind are known from the prior art. They generally comprise a winding tube on which wraps or unfolds an occulting fabric. According to the direction of rotation of the winding tube, the fabric translates between a retracted position where it is wound on said tube and an occultation position where it is unwound. Generally, the roller tube is rotated by means of an electric motor in direct contact with the latter. The roller tube and the motor rotation shaft are at least coaxial or even merged. This arrangement poses a congestion problem, especially when the blackout blind has to be integrated into a double (or triple) glazed window. The integration of a blind between the two glass volumes ensures better light management, minimum maintenance level and perfect hygiene. However, the variations in temperature and pressure to which the glazing is subjected, create internal overpressures that prevent the manufacture of insulating glass units with high air knife thicknesses. However, the winding devices known from the prior art are generally relatively bulky and require increasing the thickness of the air gap to accommodate them between the two glass volumes. Indeed, in the retracted position, the thickness of the blackout fabric adds to the diameter of the roller tube and that of the motorization. The invention aims to remedy this state of affairs. In particular, the invention aims to provide a device for winding a blackout blind whose size is reduced.

Another object of the invention is to provide an obscuring blind winding device whose design is simple and inexpensive. Yet another object of the invention is to provide an insulating multi-glazing window, incorporating a blind in its glass volume, while having a small thickness of air gap. Disclosure of the invention.

The solution proposed by the invention is a device for winding a blind for a window, comprising a winding tube on which rolls or unfolds a fabric so that said fabric translates between a retracted position where it is wound on said tube and an occultation position where it is unwound, said winding tube being rotated by means of an electric motor.

This device is remarkable in that it is remote, the electric motor rotates a motorized shaft which is offset from the roller tube and on which is fixed a first gear, which toothed wheel is engaged with an intermediate idler gear disposed below said first wheel, which pinion is engaged with a second gear disposed below said pinion, said second wheel being secured to the winding tube, the individual gears and pinion being aligned one below the other and mounted in rotation on a common support board.

This transmission return mechanism makes it possible to absorb the thickness of the fabric in the retracted position, in the space between the reel tube and the engine block. The size of the latter does not add to the size induced by the thickness of the fabric wound on the roller tube.

The overall size of this winding device is reduced, which allows to reduce accordingly the thickness of the air gap of a multi-window insulating window in which is integrated said device. Other advantageous features of the remote winding device object of the invention are listed below. Each of these characteristics can be considered alone or in combination with the remarkable characteristics defined above, which remarkable characteristics are not indispensable as such to the resolution of the technical problems that the following characteristics propose to solve: - Preferentially , the first gear has a diameter less than or equal to the thickness - or diameter - of the engine; and the second gear has a diameter less than or equal to the diameter of the wire wound on the tube. - The first gear can have a diameter of 17 mm and 32 teeth, the pinion can have a diameter of 13 mm and 24 teeth, the second gear can have a diameter of 24 mm and 48 teeth. - 4 - - Advantageously, the motorized shaft comprises two opposite ends each provided with a first gear, the winding tube also comprising two opposite ends each provided with a second gear, an intermediate gear being interposed between each first gear wheel and each second gear wheel, each transmission unit: first gear wheel / pinion gear / second gear wheel, being associated with a plate - The first gear wheel, the pinion, the second gear wheel and the support plate are preferably made of polyoxymethylene.

Another aspect of the invention relates to a window comprising a frame in which are fixed at least two glazings spaced from each other, a winding device of a blackout blind is installed in the frame. This window is remarkable in that the winding device comprises a winding tube on which a fabric is wound or unrolled, said winding tube being arranged so that said fabric translates into the internal space separating the two glazings between a position retracted where it is wound on said tube and an occultation position where it is unwound, an electric motor rotating a motorized shaft on which is fixed a first gear, which gear is engaged with an intermediate gear disposed below said first wheel, which pinion is engaged with a second gear disposed below said pinion, said second wheel being integral with the winding tube, the different gears and the pinion being aligned one below the other and mounted in rotation on a common support board attached to the frame.

Other advantageous features of the window object of the invention are listed below: The thickness of the fabric and the diameter of the roller tube are dimensioned so that in the retracted position, the bulk of said fabric wound on said tube is less than the distance separating the two glazings. - The motor has a thickness - or a diameter - which is less than the distance between the two glazings. - The motorized shaft comprises two opposite ends each provided with a first gear, the winding tube also comprising two opposite ends each provided with a second gear, an intermediate gear being interposed between each first gear and each second gear , each transmission unit: first gear / pinion / second gear, being associated with a support plate. Description of the figures.

Other advantages and characteristics of the invention will appear better on reading the description of a preferred embodiment which follows, with reference to the accompanying drawings, made by way of indicative and non-limiting examples and in which: FIG. 1 is a diagrammatic view in longitudinal section of a window according to the invention, the fabric of the blind being in the occultation position; FIG. 2 is a schematic view in longitudinal section of a window according to FIG. invention, the fabric of the blind being in the retracted position, - Figure 3 is a sectional view along AA of the window according to Figure 1 - Figure 4 is a sectional view along BB of the window according to Figure 2. Modes preferred embodiment of the invention.

The window object of the invention is intended to be installed in offices or in homes. In the accompanying figures, it comprises a frame 1 opening or fixed consisting of two vertical uprights 10a, 10b parallel and vertical crosspieces 11a, 11b parallel, assembled together so as to form a rigid rectangular frame supporting the glazing. By way of example, this frame may have a height of between 1 m and 5 m and a width of between 0.5 m and 10 m. The elements 10a, 10b, 11a, 11b of the frame 1 may be made of PVC, aluminum, wood, or any other material suitable for the skilled person. At least two glazings V1, V2 spaced apart from one another are fixed in the frame 1. In FIGS. 3 and 4, the distance "D" separating these two stained-glass windows V1, V2 defines the thickness of the blade of air. The constituent material of the stained glass windows V1 and V2 is of the type usually used by those skilled in the art. They are transparent to let in daylight and / or see through. In Figures 3 and 4, the glazing V2 which is oriented towards the interior of the room, is doubled by an additional glazing V3 (the window is in this case triple glazed). This additional glazing is however not essential depending on the degree of thermal insulation and / or acoustic sought. Preferably, a flow of air is created between the two glazings V1, V2, so that the window object of the invention is said to be "breathable".

A winding device of a blind is installed in the frame 1. This blind ensures a better thermal efficiency of the window. This device comprises a winding tube 2 on which rolls or unwinds a fabric 3. The tube 2 is advantageously in the form of a hollow tube made of aluminum or plastic, whose axis of rotation is parallel to the crosspieces 11a. , 11b. It extends all along the sleepers 11a, 11b. Its diameter is between 10 mm and 20 mm. The fabric 3 is preferably opaque, leaving little or no light. It is made of an occulting material, for example flexible fabric or paper. It may also consist of a set of opaque rigid blades, metal, wood or plastic, assembled together to form a generally flexible apron capable of being wound on the tube 2. The fabric 3 is however not necessarily opaque, but may be translucent, in part or in whole. It may for example be made of a material which allows light to pass but which filters UV. In practice, the upper end 3a of the fabric 3 - 7 - is fixed to the tube 2 and the lower end 3b can be weighted so as to promote the downward movement. As clearly shown in Figures 3 and 4, the tube 2 is arranged in the frame 1 so that the fabric 3 translates into the internal space between the two glazings V1, V2 above. In other words, the canvas 3 translates into the air space. In the appended figures, the tube 2, like the entire winding device, is hidden in the thickness of the upper cross member 11a.

According to the direction of rotation of the tube 2, the fabric 3 moves more particularly between a retracted position (FIGS. 2 and 4) and a concealment position (FIGS. 1 and 3). In the retracted position, it is wound on the tube 2: the glazings V1, V2 (and V3) are completely free, the brightness which filters through them being maximum. In the occultation position, the fabric 3 is unwound.

Its lower end 3b substantially reaches the lower crossbar llb so that the glazings V1, V2 (and V3) are completely obscured, the brightness which filters through them being minimal in the case where the fabric is blackout. Of course, the fabric 3 may be partially unwound between the occultation position and the retracted position so as to only partially hide the glazings V1, V2 (and V3).

An electric motor 4 rotates a shaft 40, both clockwise and anticlockwise. Advantageously, the motor 4 operates at 24 volts, at 30 rpm, developing a torque of between 0.5 N and 1.5 N. Its thickness - or diameter - is less than the distance D between the two glazings V1, V2 . This diameter is preferably between 20 mm and 40 mm, preferably 25 mm. One can for example use a SOMFY® motor, marketed under the reference NW25E83, this engine resistant to temperatures of the order of 85 ° C. The motorized shaft 40 is advantageously associated with an end-of-travel device, of the worm type with stop, for example, to automatically stop the motor 4 when the occultation position or the unwrapped position is reached.

The motorized shaft 40 is advantageously in the form of a steel tube whose axis of rotation is parallel to that of the tube 2, but offset from the latter. The device of the invention is therefore a remote winding device, the motor 4 not directly driving the tube 2. The shaft 40 extends all along the cross members 11a, 11b. In Figures 1 and 2, the shaft 40 has two ends 41a, 41b opposite, each being provided with a first gear 51a, 51b. The reel tube 2 also comprises two opposite ends 21a, 21b which are each provided with a second gear 61a, 61b. The first wheels 51a, 51b and the second wheels 61a, 61b are not directly engaged. An intermediate gear 71a, 71b is in fact interposed between each first gear 51a, 51b and each second gear 61a, 61b. The winding device thus comprises two transmission assemblies each consisting of a first gear, a pinion and a second gear. These transmission assemblies are symmetrically disposed at the ends of the motor shaft and the tube 2, in order to optimize the balancing of the torques. The intermediate gear 71a, 71b has the function of transmitting the rotational movement of the motor shaft 40, to the retractor tube 2. The motor shaft 40 and the winding tube 2 rotating in the same direction: either clockwise (by example to descend the fabric 3), or in the counterclockwise direction (for example to mount the fabric 3). The use of this intermediate gear 71a, 71b also makes it possible to reduce the diameter of the first wheels 51a, 51b and / or second wheels 61a, 61b. Indeed, it could be expected that the first and second wheels are directly engaged, but for the same spacing of the shaft 40 and the tube 2, their diameter should be increased, thereby impacting the overall size of the device. winding. The use of the intermediate gear 71a, 71b thus contributes to reducing the bulk of the winding device. A similar result is obtained by replacing the intermediate gear with a drive belt engaged with each first gear 51a, 51b and each second gear 61a, 61b. It is also possible to insert several intermediate gears between each first gear 51a, 51b and each second gear 61a, 61b. The objective is to interpose a transmission system between the motor shaft 40 and the tube 2, this transmission system having a minimum footprint. In the preferred embodiment which is illustrated in the accompanying figures, each second gear 61a, 61b is disposed below each intermediate gear 71a, 71b. And each intermediate gear 71a, 71b is disposed below each first gear 51a, 51b. The respective axes of rotation of these different elements are parallel and located in the same vertical plane.

Each transmission unit: first toothed wheel 51a-pinion 71a-second gear 61a on the one hand, and first gear 51b-pinion 71b-second gear 61b, on the other hand, is associated with a support plate 81a, 81b . The latter is fixed on the frame 1, by screwing, gluing, clipping, welding, etc. Each plate 81a, respectively 81b, is therefore common to: a first toothed wheel 51a, respectively 51b; an intermediate gear 71a, respectively 71b; - and a second gear 61a, respectively 61b; these elements being aligned one below the other and mounted in rotation on said plate. The latter may include bearings to reduce friction. Since the temperature constraints can be relatively large between the glazings V1 and V2, materials resistant to temperatures of the order of 85 ° C. are used. The material preferably chosen for manufacturing the first gears 51a, 51b, pinions 71a, 71b, second gears 71a, 71b, and platens 81a, 81b, is polyoxymethylene, commonly called POM. This material has in fact excellent stability at temperatures of the order of 85 ° C. Other materials can obviously be used, such as Teflon or nylon for example.

As shown in FIG. 4, the thickness of the fabric 3 and the diameter of the tube 2 define the width of the winding device. They are dimensioned so that in the retracted position, the size of said fabric on said tube is less than the distance D between the two glazings V1, V2. In fact, thanks to the invention, it can be seen that the thickness D of the air knife depends solely on this size - or diameter - of the fabric 3 wound on the tube 2. For example, using a tube 2 having a diameter of about 18 mm and a cloth fabric 3 about 0.5 mm thick, taking place over a length of 2 m, the final diameter of said fabric wound on said tube of about 40 mm is obtained . This size is perfectly compatible with a 45mm air gap, usually used in breathable glass facades of office buildings. To optimize the bulk of the winding device, the first gear 51a, 51b has a diameter less than or equal to the thickness - or diameter - of the motor 7. Similarly, the second gear 61a, 61b has a smaller diameter or equal to the diameter of the fabric 3 wound on the tube 2. The dimensions of the toothed wheels 51a, 51b and 61a, 61b are thus contained in the larger ones of the motor 4 and the fabric wound on the tube 2. The pinions 71a, 72, have a smaller diameter than the toothed wheels 51a, 51b and 61a, 61b. Their size is therefore also contained in the larger ones of the motor 4 and the fabric wound on the tube 2. By way of example, the Applicant has obtained an optimum bulk when the first toothed wheels 51a, 51b have a diameter of 17 mm. and 32 teeth, the pinions 71a, 71b have a diameter of 13 mm and 24 teeth, and the second gears 61a, 61b have a diameter of 24 mm and 48 teeth.

The arrangement of the various elements and / or means of the invention, in the embodiments described above, should not be understood as requiring such an arrangement in all implementations. In any case, it will be understood that various modifications can be made to these elements and / or means without departing from the spirit and scope of the invention. In particular, it can be provided to use only one transmission unit: first gear / pinion / second gear.

Claims (9)

REVENDICATIONS1. Apparatus for winding a blind for a window, comprising a winding tube (2) on which a web (3) is wound or unrolled so that said fabric translates between a retracted position where it is wound on said tube and a occultation position where it is unwound, said winding tube being rotated by means of an electric motor (4), characterized in that the electric motor (4) rotates a motorized shaft (40) which is offset from the reel tube (2) and on which is fixed a first gear (51a), which gear (51a) is engaged with an intermediate gear (71a) disposed below said first gear, which pinion (71a) ) is engaged with a second toothed wheel (61a) disposed below said pinion, said second wheel (61a) being integral with the winding tube (2), the different toothed wheels (51a, 61a) and the pinion (71a) being aligned one below the other and mounted in a ro tation on a common support plate (81a). 2. Device according to claim 1, wherein: the first toothed wheel (51a) has a diameter less than or equal to the thickness - or diameter - of the motor (4), - the second toothed wheel (61a, 61b) has a diameter less than or equal to the diameter of the fabric (3) wound on the tube (2). 3. Device according to one of the preceding claims, wherein: the first gear (51a) has a diameter of 17 mm and 32 teeth, the pinion (71a) has a diameter of 13 mm and 24 teeth, the second gear (61a) has a diameter of 24 mm and 48 teeth. 4. Device according to one of the preceding claims, wherein the motorized shaft (40) comprises two opposite ends (41a, 41b) each provided with a first toothed wheel (51a, 51b), the winding tube (2) comprising also two opposite ends (21a, 21b) each provided with a second gear (61a, 61b), an intermediate gear (71a, 71b) being interposed between each first gear (51a, 51b) and each second gear (61a). , 61b), each transmission unit: first gear / pinion / second gear, being associated with a support plate (81a, 81b). 5. Device according to one of the preceding claims, wherein the first toothed wheel (51a, 51b), the pinion (71a, 71b), the second toothed wheel (71a, 71b) and the support plate (81a, 81b) are made of polyoxymethylene. 6. Window comprising a frame (1) in which are fixed at least two glazings (V1, V2) spaced from one another, a winding device of a blind is installed in said frame, characterized by the the winding device comprises a winding tube (2) on which a fabric (3) is wound or unrolled, said winding tube being arranged such that said fabric (3) translates into the internal space separating the two glazings (V1, V2) between a retracted position where it is wound on said tube and an occultation position where it is unwound, an electric motor (4) rotating a motorized shaft (40) on which is fixed a first wheel toothed gear (51a), which toothed wheel is engaged with an intermediate gear (71a) disposed below said first gear, which gear is engaged with a second gear (61a) disposed below said gear, said second gear being secured winding tube (2), the different toothed wheels (51a, 61a) and the pinion (71a) being aligned one below the other and rotatably mounted on a common support plate (81a) fixed to the frame (1). 7. Window according to claim 6, wherein the thickness of the fabric (3) and the diameter of the winding tube (2) are dimensioned so that in the retracted position, the size of said fabric wound on said tube is less than at the distance (D) separating the two glazings (V1, V2). 8. Window according to one of claims 6 or 7, wherein the motor (4) has a thickness - or a diameter - which is smaller than the distance (D) between the two windows (V1, V2). 9. Window according to one of claims 6 to 8, wherein the motorized shaft (40) comprises two opposite ends (41a, 41b), each provided with a first toothed wheel (51a, 51b), the roller tube ( 2) also comprising two opposite ends (21a, 21b), each provided with a second gear (61a, 61b), an intermediate gear (71a, 71b) being interposed between each first gear (51a, 51b) and each second toothed wheel (61a, 61b), each transmission unit: first gear wheel / pinion gear / second gear wheel, being associated with a support plate (81a, 81b).