CZ20002124A3 - Winding device for belt winding, mechanism for control of shutter or sunblind provided with this winding device and process for producing such winding device - Google Patents

Abstract

The solution relates to a winding device (1) for winding a strip (2) or the like for controlling blinds, blinds or the like the device. The winding device (1) comprises a winding member (3) a tensioning said belt (2) arranged inside the box consisting of two skins (4, 8), each of which includes at least one one edge flange (44, 84) lying substantially in the direction perpendicular to the base wall (41, 81) of each housing (4, 8). These the edge flanges (44, 84) are arranged to be brought into position interconnecting by means of a reciprocal sliding movement (F1) in a direction substantially parallel to the respective the base walls (41, 81) of said sheaths (4, 8) v an arrangement wherein the first edge skirt (44) of the first skirt (4) it is surrounded by a second rim (84) of the second housing (8).

Description

A strip winding device, a roller or blind control mechanism provided with such a winding device, and a method for manufacturing the winding device

Technical field

BACKGROUND OF THE INVENTION The invention relates to a winding device for winding a belt, a mechanism for operating a roller shutter or a blind provided with the winding device, and to a method for producing the winding device.

BACKGROUND OF THE INVENTION

It is known to use a belt, strap or other flexible rod to operate a roller shutter or blind, and more generally for any device provided with a roller shutter adapted to be wound accordingly onto a shaft to cover or expose an opening, such as a window or building door.

In order to prevent the belt or strap from hanging down to the ground, especially when the roller shutter is in a wound configuration, there are belt winding devices disposed near such an opening, the winding device being provided with a tensioning member for said belt. the belt by automatically winding it inside the winding device.

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For example, EP-A-0 812 795 discloses a belt winding device comprising a spring box disposed within a body formed by two skins arranged on a hinge so that they can snap together by rotating about the hinge axis. When such a winding device is in the mounted position, there is a slot for the connection between the two skins, the width of the slot being not accurately determined due to the normal manufacturing tolerances for this type of device.

In the above-mentioned slit they tend to accumulate impurities, which is both aesthetic and unfavorable from the health point of view. In addition, such a winding device, which is located near the aperture, is exposed to temperature changes of significant amplitude, particularly as a result of being exposed to the sun's rays. It is often the case that such shells, which are subjected to different thermal stresses depending on their location, are deformed to such an extent that the slit opens wide, which is another significant drawback.

Finally, the manufacture of the hinge requires the use of complex tools, resulting in a substantial increase in manufacturing cost for the manufacture of the box in known winding devices.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the aforementioned drawbacks by providing a belt winding device, the casing of which is simple and thus designed.

very reliably, avoiding the formation of a groove in which dirt could collect.

For this purpose, the present invention relates to a winding device for winding a belt or the like for operating a roller shutter, a blind or the like, said winding device comprising a winding and tensioning member of said belt arranged within a two-shell container each comprising at least one edge flange extending in a direction substantially perpendicular to the base wall of each shell, said edge flanges being arranged to engage with one another in a direction substantially parallel to the respective base walls of said skins in an arrangement wherein the first edge flange of the first the skirt is surrounded by a second skirt of the second skirt.

Each of said edge flanges preferably lies in at least two substantially perpendicular directions.

The outer surface of the first edge flange is preferably provided with relief elements adapted to cooperate with corresponding relief elements formed on the inner surface of said second edge flange for assembling said sheaths.

Each of said skins is preferably provided with a substantially rectilinear edge and a concave edge whose concave shape in the assembled receptacle configuration faces the tensioning member, said edge flanges extending at the level of said concave edge over an angular sector with an apex angle which is greater or equal to 180 °.

Preferably, one of said skins comprises a second peripheral skirt extending in a direction substantially perpendicular to said direction of relative sliding movement of said skins, and provided with at least one recess for receiving a protuberance formed on the other skirt.

Preferably, one of said sheaths is provided with a resilient stop adapted to cooperate with a corresponding part of the other sheath to secure said sheaths in an assembled configuration of the receptacle.

Preferably, said resilient stop is formed on a rectilinear edge of said housing, which is oriented towards the bulkhead in the vicinity of which the winding device is adapted to be mounted, said resilient stop being masked by the winding device in a normal position of use.

Said stop is preferably formed by a resiliently deformable tongue lying in a direction substantially perpendicular to said direction of relative sliding movement of the skins.

Due to the object of the present invention, it is not necessary to use a hinge to assemble the coil box. On the other hand, in the assembled configuration, one edge skirt surrounds the other edge skirt, the outer surface of the outer skirt forming a uniform visible surface of the receptacle without a slot or opening.

In accordance with the preferred features of the present invention, the winding device has one or more of the following features:

Each of the edge flanges substantially perpendicular to the directions of the two skins, immobilized by the co-operation, lies at least. This allows the edge flange shapes parallel to the two directions to be achieved in two mutually reciprocal directions.

The outer surface of the first edge flange is provided with relief elements adapted to cooperate with corresponding relief elements formed on the inner surface of the second edge flange for assembling the sheaths. These relief elements, which may include grooves and ribs of corresponding profiles, make it possible to achieve a sufficient connection of the edge flanges and to prevent the casings from detaching one another.

The skins are provided with a substantially rectilinear edge and a concave edge whose concave shape in the assembled receptacle configuration faces the tensioning member, the edge flanges extending at the level of the concave edge over an angular sector with an apex angle greater than or equal to 180 °.

One of the skins comprises a second peripheral skirt extending in a direction substantially perpendicular to the direction of relative sliding movement of the skins and provided with at least one recess for receiving a protuberance formed on the other skirt. This makes it possible to achieve additional immobilization of the two sheaths forming the shell relative to one another.

One of the jackets is provided with a resilient stop adapted to cooperate with a corresponding part of the other jacket to secure the jackets in the assembled configuration of the receptacle. In the present case, the stop is preferably formed at the edge of the housing, which is oriented towards the bulkhead in the vicinity of which the winding device is adapted to be mounted, the flexible stop being masked by the winding device in the normal position of use. Due to this aspect of the present invention, said stop is not directly accessible to a user who is unaware of its existence, for example a child, while a professional worker can access the stop by rotating the winding device or by sliding fingers between the winch and the baffle.

In addition, said stop may be formed by a resiliently deformable tongue lying in a direction substantially perpendicular to the direction of relative sliding movement of the skins.

The present invention also relates to a mechanism for operating a roller shutter, blind or the like comprising a belt winding device as described above. Such an actuating mechanism is much more economical, and is much easier to install than known devices.

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Finally, the present invention relates to a method for manufacturing a belt winding device or the like for a roller shutter, blind or the like as described above, comprising a belt winding and tensioning member and two jackets adapted to form a receptacle for said winding device. the method includes the following steps:

molding two jackets each having a base wall and an edge flange extending in a direction substantially perpendicular to said base wall, providing one of said jackets with fastening elements and / or a brake for said belt, in particular by riveting, assembling said jackets by subjecting them to relative sliding movement in a direction substantially parallel to their respective base walls, and sealing said skirts together by cooperating in the shape of said edge skirts.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be explained in more detail below with reference to exemplary embodiments of a belt winding device in accordance with the basic principles of the present invention, the description of which will be given with reference to the accompanying drawings, in which:

Fig. 1 is an axonometric view of a belt winding device according to the present invention during assembly;

Fig. 2 is an axonometric view of the belt winding device of Fig. 1 in an already assembled configuration;

Fig. 3 is a cross-sectional view of the winding device of the present invention, taken along the line III-III in Fig. 2, wherein neither the belt nor the lower bracket of the winding device is shown;

Fig. 4 is a cross-sectional view similar to that of Fig. 3, with the winding device being assembled and an intermediate arrangement between Figs. 1 and 2;

Fig. 5 is an enlarged cross-sectional view taken along the line V-V of Fig. 2;

Fig. 6 is an enlarged cross-sectional view taken along the line VI-VI of Fig. 2; and FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. 2.

scale,

DETAILED DESCRIPTION OF THE INVENTION

In the accompanying drawings, a winding device 1 is shown which is intended to keep the belt 2 in tension.

condition when operating the roller or roller blind winding shaft (not shown). The spring receptacle 3 is arranged for exerting a resilient force on the belt 2, which tends to wind the belt 2 around the periphery of the spring receptacle 3 in the direction of the arrow R of Fig. 1.

The spring box 41 is arranged on a housing 8 made of plastic material and comprising a base wall 41, in the central part of which a shaft 42 is integrally formed for receiving and centering the spring box 3. The base wall 41 is provided with a substantially straight edge 41a and a concave edge 41b, whose concavity is directed towards the shaft 42 and to the spring box 3.

At the level of the rectilinear edge 41a, the base wall 41 passes into a substantially rectilinear rim 43 that is perpendicular to the base wall 41. Similarly, the edge flange 44 extends at the level of the concave edge 41b of the base wall 41 perpendicular to the base wall 41, wherein the edge flange 43 and the edge flange 44 extend on the same side with respect to the base wall 41.

The edge flange 43 is provided with two elongated holes 43a that are substantially parallel to the rectilinear edge 41a. A tongue 43b is also formed in the skirt 43 by means of two slits 43c that are substantially perpendicular to the rectilinear edge 41a. The outer surface of the tongue 43b, i.e. the surface facing outwardly from the spring receptacle 3, is provided with grooves or grooves 43d.

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The outer surface 44a of the skirt 44 is provided with a groove 44b that is substantially parallel to the concave skirt 41b of the base wall 41. Near the skirt 43 the skirt 44 widens to form two pads 44c on which the brackets 5 are riveted allowing mounting of the winding a vertical baffle device 7 by means of bolts, represented only by dashed lines, representing respective axes 6 of bolts.

In the upper part of the rim 43 and opposite the rim 44c, there is also provided a brake 4 which is riveted to the rim 44c by means of a corresponding bracket 5. This brake comprises a cam 7a articulated about the pin 7b and adapted to cooperate with the other. a pin 7c to block the belt 2 when it extends in a substantially vertical direction as shown in FIG. 1.

All of the components 3 to 7 that are housed in the housing 4 allow the winding device 11 to function, and these components 3 to 2 must be protected from the effects of the environment.

For this purpose, there is provided another casing made of plastic material, which comprises a base wall 81 having a shape similar to the base wall 41 and which is similarly provided with a rectilinear edge 81a and a concave edge 81b. The rectilinear edge 81a of the base wall 81 is provided with two elongated-shaped protrusions 83a that correspond to the shape of the elongate holes 43a.

The small size recess 83b extends transversely to the rectilinear edge 81a in its central portion. Concave · • * «» · β 4 4 4 * _β ···· ·· · T «W • ·» · R · * «• ♦ ··· ·« · «« * • · «· The edge 81b of the base wall 81 carries an edge flange 84 extending in a direction substantially perpendicular to the base wall 81 over most of the concave edge 81b.

The inner surface 84a of the skirt 84, i.e. the surface facing the base wall 81, is provided with a rib 84b whose profile corresponds to the profile of the groove 44b in the skirt 44. In fact, as shown in FIG. 5, the profiles of the surfaces 44a and 84a are complementary.

In accordance with the present invention, the housing is adapted to be mounted on the housing 4 by a sliding movement parallel to the base walls 41 and 81, and shown in FIG. The purpose of this movement is to bring the straight edges 41a and 81a to one another, and to bring the edge flange 84 to the edge flange 44 so as to actually completely surround and cover it, as shown in Figure 2.

In the assembled state shown in FIG. 2, the winding device 11 is a closed assembly with the protrusions 83a engaging in the holes 43a while the recess 83b passes beyond the tongue 43b, thereby locking the tongue 43b within the recess 83b.

As best seen in the comparative figures of FIGS. 3 and 4, the groove 44b and the rib 84b cooperate to guide the sliding movement in the direction of the F1 direction of movement as shown in FIG. 4 and to effectively mount it. the edge skirts 44 and 84 toward each other as shown in the position of FIG. 3.

Fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl fl • · * ·

The mutual cooperation of the profiles of the surface areas 44a and 84a is best seen in the illustration of FIG. 5.

The concave edges 41b and 81b of the base walls 41 and 81 lie substantially parallel to the direction arrow F1 in the X direction and substantially perpendicular to the direction arrow F1 in the Y direction. In this way, the edge flanges 44 and 84 lie in two directions so that when one of them rests on the other, the tires 4 and <3 are relatively immobilized in both the X and Y directions. In other words, the non-rectilinear nature of the edge flanges 44 and 84 ensures good immobilization of the jackets 4 and 8 relative to each other.

The edge flanges 44 and 84 extend around the shaft 42 over an angular sector with an apex angle of approximately 220 °, which means that the edge flanges 44 and 84 cooperate over more than half the circumference of the thus formed receptacle as viewed from the shaft 42.

As can be seen more clearly in FIG. 6, the protrusions 83a of the rectilinear edge 81a fit into the elongate holes 43a of the skirt 43, thereby preventing premature opening of the shell formed between the free edge 43e of the skirt 43e. and a straight edge 81a. Thus, the protrusions 83a prevent inward deformation of the rectilinear edge 81a when the winding device 1 is in the assembled state.

As can be seen from FIG. 7, the beak 43f of the tongue 43b is arranged to extend beyond the recess 83b due to the tapered face facing the direction of the bevel. · The interior space of the housing _4. In this position, the tongue 43b then acts as a resilient lock, preventing movement of the housing 60 in a direction opposite to that of the arrow F1.

If it is necessary to open the housing formed by the sheath 8 and the sheath 8, it is sufficient to apply a force in the direction of arrow F2 in FIG. 7 to the tongue 43b so that the tongue 43b assumes a position shown by dashed line in which the beak 43f no longer prevents sliding. in the direction of arrow F3.

The winding device 1 can be assembled automatically, since the riveting of the brackets 5 and the brake 4 to the pads 44c can be done by one handling device, while the positioning and adjustment of the spring box 3 on the shaft 42 can also be automated. The second jacket 8 can then be arranged on the first jacket 8, after which the winding device 1 can be packaged and distributed.

At the place of installation, the user then attaches the winding device 7 to the frame of the respective opening by means of brackets 5 and releases the casing 8 to allow access to the spring box 3. Then it is sufficient to attach the lower end of the belt 2 to the spring box 3 and remove the clip 9 immobilizing the spring box 3 before sliding the housing 8 in the direction of the arrow F1 to close the spring housing 3 formed by the housing 8 and the housing 8, the end of movement of the housing 8 resulting in fastening the spring housing 3 in a closed configuration by cooperating the shapes of the elongated hole 43a, tongue 43b 83a and concession 83b.

Taking into account the usual orientation of the brackets 5, the edge flange 43 of the housing 4 is designed to face the partition on which the winding device 7 is mounted. As a result, the tongue 43b and the elongated holes 43a are not immediately accessible, especially for children, which avoids the risk of unauthorized opening.

If the skilled person or authorized person wishes to open the spring box 3 formed by the housing 4 and the housing 8, it is sufficient to rotate the housing 4 around a hinged bearing formed by rivets fastening the brackets 5 in order to gain access to the tongue 43b which can then be applied to withdraw the beak 43f as shown by the arrow F2 in FIG. 7.

The present invention is illustrated with a housing 4 which is provided with a flexible tongue 43b. However, such an element can be equally well arranged on the housing 8 without departing from the scope of protection of the present invention.

In any case, the winding device 1 of the present invention is aesthetically harmonious without a slot forming an aperture at its edge and the assembly has good durability, both of which can be easily manufactured by pressing without the use of complex molds such as sliding forms.

Moreover, the winding device 1 according to the invention can be assembled automatically, which makes it possible to significantly reduce its cost and costs.

Claims (9)

PATENT CLAIMS A winding device (1) for winding a belt (2) or the like for operating a roller shutter, a blind or the like, said winding device (1) comprising a winding and tensioning member (3) arranged within the box, formed by two skins (4, 8) each comprising at least one edge skirt (44, 84) lying in a direction substantially perpendicular to the base wall (41, 81) of each skirt (4, 8), characterized in that: said edge flanges (44, 84) are arranged to be brought together by a reciprocal translational movement (F1) in a direction substantially parallel to the respective base walls (41, 81) of said skins (4, 8) in an arrangement wherein the first edge flange (44) of the first shell (4) is surrounded by a second edge flange (84) of the second shell (8). A winding device (1) according to claim 1, characterized in that each of said edge flanges lies in at least two substantially perpendicular directions (X, Y). Winding device (1) according to any one of the preceding claims, characterized in that the outer surface (44a) of the first edge flange (44) is provided with relief elements (44b) adapted to cooperate with corresponding relief elements (84b) formed on the inner surface (84a) of said second edge flange (84) for assembling said sheaths (4, 8). • · · · A winding device (1) according to any one of the preceding claims, characterized in that each of said sheaths (4, 8) is provided with a substantially rectilinear edge (41a, 81a) and a concave edge (41b, 81b) whose concave shape in the assembled configuration of the receptacle, it is directed towards the tensioning member (3), said edge flanges (44, 84) extending at the level of said concave edge (41b, 81b) over an angular sector with apex angle (α) which is bigger or equal to 180 °. 5. Retractable equipment (1) according to any from the previous claims, v y z learning in that one of said skins comprises a second peripheral skirt (43) extending in a direction substantially perpendicular to said direction (Fl) of the relative sliding movement of said skins and provided with at least one recess (43a) for receiving a protrusion (83a) formed on another jacket (8). Winding device (1) according to any one of the preceding claims, characterized in that one of said sheaths (4, 8) is provided with a resilient stop (43b) adapted to cooperate with a corresponding part (83b) of the other sheath (8, 4). ) in order to secure said sheaths (4, 8) with the box arrangement assembled. A winding device (1) according to claim 6, characterized in that said resilient stop (43b) is formed on a rectilinear edge (41a) of said casing (4) which is oriented towards the bulkhead in proximity of the winding device (1). 1) adapted · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · The flexible stop is masked by the winding device (1) in the normal position of use. Winding device (1) according to claims 6 or 7, characterized in that said stop is formed by a resiliently deformable tongue (43b) lying in a direction substantially perpendicular to said direction (F1) of the relative sliding movement of the sheaths (4, 8) . A mechanism for operating a roller shutter, blind or the like, characterized in that it comprises a winding device (1) for winding the belt (2) according to any one of the preceding claims. A method for manufacturing a winding device (1) for winding a belt (2 of a device 11, to be assembled for a device (1) or the like for a roller blind, comprising a belt member (3) and two shells comprising the following steps: a winding or similar winding and tensioning (4, 8) adapted to form a winding box of said winding, characterized in that the molding of two shells (4, 8) each having a base wall (41, 81) and an edge flange (44, 84) ) extending in a direction substantially perpendicular to said base wall (41, 81), providing one of said casings with fastening elements (5) and / or a brake (7) for said strip (2), in particular by riveting, assembling said casings by subjecting them to a relative displaceable movement (F1) in a direction substantially parallel to their respective base walls (41, 81), and closing said skins (4, 8) together by cooperating the shapes (44b, 84b) of said edge frames (44) , 84).