ITRM20120133A1 - PLEATED MOSQUITO WITH ROLLER ROLLER. - Google Patents

Description

â € œPLEATED MOSQUITO NET WITH REEL ROLLERâ €

______________________________________________________________________ Description

Technical sector

The present invention refers to a mosquito net for a window or a French window. In particular, the invention relates to an improvement to mosquito nets with winder roller.

Known technique

In traditional insect screens with winding roller, the winding roller receives the flat mesh fabric of the insect screen by wrapping it automatically (thanks to a return spring) around its surface when the user releases the handle bar, that is the mobile profile to which One end of the flat net is attached. The diameter of the winding roller therefore increases as the net wraps around the roller, so that the dimensions of the profile (box) that houses the winding roller must also be quite large. However, this often makes it impossible to mount this box, especially in modern homes, where the walls are rather thin and therefore the mounting space of a mosquito net (between the shutter / roller shutter and the window) is very limited. .

Therefore, in the field of insect screens with winding roller there is currently the need to provide an insect screen whose structure is such as to allow easy assembly in all situations.

A further disadvantage of traditional insect screens with roller is the difficulty of keeping the flat fabric of the net taut at its side edges (wind resistance). In particular, in the case of a French window, the lower guide (lower guide profile) of the handle bar of the mosquito net would have a height incompatible with the safety of people crossing the threshold of the French window. In fact, such people can easily trip over the lower guide if they do not pay due attention, and in the case of older people the traditional guide would even be an uncomfortable obstacle. On the other hand, if the bottom guide is too low (thin), the bottom edge of the mesh may at least partially come out of the guide due to a gust of wind or other reasons. Therefore, there is nowadays the need on the part of the consumer to be able to have a functional and safe mosquito net in this respect.

These and other objects are achieved thanks to a mosquito net as specified in the attached claims.

Some particular embodiments of the mosquito net, object of the present invention, are defined in the dependent claims.

In order to better understand the present inventive concept to a person skilled in the art, the present invention will now be illustrated purely by way of non-limiting example, resorting to a particular embodiment thereof shown in the figures and currently considered preferred.

Furthermore, in order to simplify the following detailed description of the invention, it is appropriate to limit oneself to the description of a French window, since the generalization of the present inventive concept (also to the case of a window) is directly within the reach of the average person skilled in the art.

Brief description of the drawings

In the figures:

FIGURE 1 is a perspective view of the mosquito net for French windows, according to the present invention;

FIGURE 2 is a front view of the mosquito net (of Fig. 1) object of the present invention;

FIGURE 3 shows the box assembly, according to the present invention, in an exploded perspective view;

Figure 4a shows a first detail of Fig. 3;

FIGURE 4b shows a second detail of Fig. 3;

FIGURE 5 represents, in perspective, the net assembly of the mosquito net according to the present invention, coupled to the handle bar;

FIGURE 6 is the analogue of Fig. 5, according to a section and plan view;

FIGURE 7 is a sectional and plan view of the detail relating to the arrival upright and to the handle bar of the mosquito net according to the present invention;

FIGURE 8 is a sectional and plan view of the mesh group assembled to the handle bar, at one end, and to the box, at the other end;

FIGURE 9 is the sectional and plan view of a mosquito net for French windows at the end of the assembly and installation, according to the preferred embodiment of the invention, and during the actuation phase of the handle bar (movement towards the upright of arrival);

FIGURE 10 is the homologous of Fig. 9, in a front view (see Fig. 2).

Detailed description of the preferred embodiment

From the following detailed description of a preferred embodiment of the present invention it is evident to an average person skilled in the art how the present invention solves the previous technical problems and what further and considerable advantages it is able to offer to the user.

First of all, the mosquito net of the present invention constitutes a mosquito net with a pleated fabric winding roller. This in itself is already an absolute novelty, but the resulting advantages in terms of technical progress will be understood only after reading this description.

Basically, the inventor of the mosquito net of the present invention has decided to avoid winding the fabric of the mosquito net around the winding roller, as occurs in traditional flat net mosquito nets, and to wind around the winding roller only threads whose function It is to keep the pleated net in one plane, in an extended position, preventing it from skidding in the presence of wind or other external forces.

From this it follows that the pleated net folds on itself like an accordion, or stretches, when the mosquito net is closed or respectively when it is opened, without ever entering inside the box and even less winding itself around the winder roller. To avoid confusion, in the following we will always use the verb `` close '' the mosquito net in the sense of `` moving the handle bar towards the box '' (rest position of the mosquito net), and `` open '' in the sense of moving the handle bar towards the arrival post (see below), ie towards the operating position of the mosquito net (position that prevents insects from entering).

The threads will be constantly subjected to the traction force exerted by the spring of the winding roller, so that especially in the operative position of the mosquito net they will constitute very valid means for keeping the pleated net of the mosquito net taut. This is why it will be sufficient to provide a lower guide of the handle bar (for example only about 4 mm in height) much lower / thinner than the lower guide of the handle bar in traditional insect screens with roller.

It will therefore be sufficient to provide the last wire (the lowest one) at a suitable height with respect to the floor level, to ensure that the mosquito net will not let insects pass even in the presence of wind, i.e. that the lower edge of the pleated fabric will remain aligned inside the lower guide. Furthermore, since according to the present invention the box will no longer have to accommodate the roller insect screen net, this box may have transversal dimensions (section) much smaller than those of a traditional box, and for example its dimensions they may be only about 2.8 cm or less. This will allow, as has been said, to mount the insect screen in all situations, even when for reasons of space the traditional roller insect screen cannot be installed.

Even if this is an obvious consideration, it is still worth remembering that any roller insect screen has the advantage, compared to other insect screens (even compared to those with pleated fabric already made and without a winding roller), that the handle bar does not have to be accompanied by the user towards the closed position (rest), since it is “pulled” towards this position by the spring of the winder roller. Therefore, a potential user of the winding roller system, which is more comfortable in some respects, may not be able to install it only for reasons of space; the present invention remedies this drawback.

The technical details which allow to implement the invention in its preferred embodiment will now be described.

Fig. 1, annexed to the present patent application for invention, illustrates the external appearance of the insect screen with roller according to the present invention, installed in a French window.

It includes an arrival upright 9, a lower guide 8, a box 1, and an upper guide 7. All these elements are stationary and are fixed to the wall of the French window (not shown) by means of known techniques not relevant for the purposes of the invention. The handle bar 10 is nothing more than a profile operated by the user to open the mosquito net, which will be blocked by magnets or other systems in the operating position of the mosquito net, and which will be released by the user to close the mosquito net, automatically returning towards the box 1 under the action of the return force of the spring 5 placed inside the box 1.

The mesh 4 constitutes a pleated fabric that always remains outside the box. The pleated fabric of the net 4 receives the threads 3.1 - 3.n in a plurality of holes arranged in a row (a row of holes for each thread 3.i) in the way already described for example in EP 1 701 641 B1.

Fig. 2 does not substantially add anything new to Fig. 1 and it only represents the mosquito net of the invention seen from the front. In Fig. 2, however, it can be better seen how the height of the lower guide 8 is minimal compared to the height of the upper guide 7. This is possible, as mentioned above, since in this case the tension of the lower thread 3.n (which is kept under tension by the elastic return spring 5 of the winding roller located in the box 1) is sufficient to prevent the lower edge of the net 4 from coming out of the lower guide 8.

Fig. 3 shows the unit of the box 1, in an exploded view.

The box 1 is composed of an aluminum profile, closed at the ends by two covers 6, 6, on which a winding roller 2 is centered, in the manner described below. The box 1 also contains the spiral spring 5 (return spring 5) and a screw with metric pitch 14 (see Fig. 4a) which allows the rotation and at the same time also the translation of the winding roller 2 itself. In detail, with reference to Figs. 4a and 4b, the upper hood 6 is rigidly connected to the box 1 and to the metric pitch screw 14. The other end of the latter is received inside the internally threaded upper end of the winding roller 2. The latter has a plurality of collars acting as bearings, 2a, as shown in Fig. 3 and in Fig. 4a (which shows only the upper collar 2a). These collars 2a come into contact with the inner wall of the box 1 and allow the rotation of the winding roller 2 around its own axis inside the box 1 which is obviously stationary.

As far as the lower end of the box group is concerned, shown in particular in Fig. 4b, one end of the spiral spring 5 is fixed to a polygonal head element (pin) 5a which is pressed into the Inside of the lower end (in Fig. 3) of the winding roller 2, in an axial hole of the latter. The lower end (in Fig. 4b) of the spiral spring 5 is instead fixed to the lower casing 6 (in turn fixed to the box 1) by means of a vertical extension 6a of the casing 6, which is inserted for approx. . 2 cm in the spiral spring 5.

The function of the metric pitch screw 14 will be clarified later.

The network group is shown in Figs. 5 and 6. It includes a certain quantity of pleated net 4, perforated and fixed on two net holder profiles 11a, 11b. In the holes present, relative to the â € œnâ € rows of holes, â € œnâ € corresponding threads 3.1 â € ¦ 3.n are passed (see EP 1701 641 B1), which cross the pleated mesh 4 for the entire length of the mosquito net.

Said wires 3.1 to 3.n are:

- on the one hand fixed to a spring device 12 (Fig. 6) which allows the length to be adjusted (to compensate for example the effects of thermal changes on the wires themselves);

- and on the other they are left free to slide and ready to be fixed to the box group.

On the side where the adjustment devices 12 are present, the handle bar 10 is interlocked (Fig. 6).

The completion profiles 7, 8, 9 (upper guide, lower guide, arrival upright) are those that complete the â € œfixed frameâ € of the mosquito net of the invention, which obviously includes first of all the box 1, containing the fundamental elements of the kinematics, which remain adequately protected inside the box itself 1.

Note once again that the lower guide 8 is particularly low / thin (no more than 4 mm, for example); its very reduced thickness facilitates and makes the passage easier, without constituting an obstacle.

Inside the arrival upright 9 there are magnetic devices 13 (see Fig.7), which allow the hooking and keeping of the handle bar 10 in the open position.

During assembly, the wires 3.1 â € ¦ 3.n previously left free (Fig. 5) are fastened to the winder roller 2, which, operated manually, allows the wires to be wound; thanks to the metric screw 14 they do not overlap, in fact (see Figs. 3 and 4a) during the rotation of the winding roller 2 it kneads on the metric screw 14 and therefore at the same time it moves longitudinally (translates) along its longitudinal axis preventing the overlapping of each wire 3.i on itself.

As a result of the winding of the wires 3.1 â € ¦ 3.n, the net 4 and the handle bar 10 are recalled towards the box 1, resulting in â € œpackagingâ €. The box 1 and the net unit are joined together by hooking the net holder profile 11b (see Fig. 8).

Once the phase of winding the wires has been completed, the spiral spring 5 is charged (preloaded), which in turn is possible, by intervening directly on it.

The size of the mosquito net determines the winding revolutions to be given to the spring. After installation (Figs. 9 and 10) it will be possible to operate the handle bar 10 and take it towards the arrival upright 9 so as to hook it to the magnetic retaining means 13; this action will load the spring 5 even more, which by putting tension on the threads 3.1 â € ¦ 3.n will allow the net (free to move on the threads themselves) to stretch at will, guaranteeing a solid barrier against insects in general.

Obviously the present invention is not limited to the means described in the preferred embodiment illustrated in the drawings.

For example, the magnets 13 could be replaced by other retaining means. The metric screw 14 could be replaced by a more complicated but functionally equivalent system, such as to transform an angle of rotation Î ± into a minimum translation and (preferably) proportional to Î ±, so as to avoid the overlapping of each wire on itself while winding around the take-up reel 2.

Purely by way of example, a translation of about 6 cm of the winding roller 2 along its longitudinal axis, simultaneously with its rotation around the same axis, has proved to be sufficient to avoid the overlapping of the wires in the case of French doors with a width of up to 3 about meters.

The present description obviously does not include the detailed description of all those means which are already known to the skilled in the art and which are necessary for the correct functioning of the mosquito net, insofar as these means do not fall within the scope of the present inventive concept. For example, there will necessarily be a system to slow down / brake the travel of the handle bar that is released by the user (or detached from the magnets or similar means of restraint), in order to prevent the handle bar 10 `` crashing '' against the box 1 Such means are obvious to a person skilled in the art and could consist of magnets placed on the lower base of the handle bar (which faces the lower guide) and in suitable points of the lower guide itself. The interaction between these magnets causes the desired slowdown of the handle bar.

The advantages of the mosquito net are:

a) greater wind resistance;

b) very thin lower guide;

c) safer and more constant mechanical friction;

d) less dirt accumulated on the net;

e) greater isolation from crawling insects;

f) for aesthetic purposes, the user is free to regulate the mains voltage.

List of reference numbers

1 box

2nd collars, bearings

winder roller

.1 â € ¦ 3.n wires

pleated net

return spring

caps / covers

to extension of the cuff

guide profile (upper in the case of French windows) guide profile (lower in case of French windows) end profile (arrival jamb for French windows) 0 handle bar

1st net holder profile (connected to the handle bar)

1b net holder profile (connected to the box)

2 wire adjustment

3 magnetic restraint devices

4 screws with metric pitch

Claims (12)

CLAIMS 1. Mosquito net with roller (2) for windows or French windows, comprising a roller (2), a return spring (5) for the insect protection net (4), a stationary box (1) for containing and supporting the winding roller (2), which is mounted in the housing (1) so that it can rotate around its longitudinal axis, a handle bar (10), guide profiles (7, 8) of the handle bar (10) can be fixed, such as the housing (1 ), at the respective edges of the window opening or French window, in which said insect protection net (4) extends between the box (1) and the handle bar (10), characterized by the fact that the insect protection net (4) is pleated and has rows of holes on its pleated portions for the passage of wires (3.1 - 3.n) which extend between said box (1) and said handle bar (10) keeping the net (4) substantially on the plane of the same wires (3.1 â € ¦ 3.n) in all the positions assumed by the handle bar (10); in which these wires (3.1 - 3.n) are fixed at one end to the winding roller (2) and at the other end to the handle bar (10) or to a part (11a) connected to it, and in which the net (4) is fixed at one end to the box (1) or to a part (11b) connected to it, and to the other end to the handle bar (10) or to a part (11a) connected to it, in which said return spring (5) is preloaded and acting on the winding roller (2) constantly exerts a traction on the wires (3.1 - 3.n) tending to make the handle bar (10) return to a starting position. 2. Mosquito net according to claim 1, characterized in that it comprises means (14) suitable for causing the translation of the winding roller (2) along its longitudinal axis, simultaneously with its rotation around its longitudinal axis, in order to avoid the overlapping of each wire (3.1 â € ¦ 3.n) on itself during the return of the handle bar (10) towards said starting position. 3. Mosquito net according to claim 2, characterized in that said means (14) consist of a screw (14) with metric pitch. 4. Mosquito net according to any one of the preceding claims, characterized in that it constitutes a mosquito net for French windows and in which the lower guide profile (8), placed on a floor, has a minimum height, not greater than about 4 mm. 5. Mosquito net according to any one of the preceding claims, characterized in that the box (1) has a maximum dimension of its cross section that does not exceed about 2.8 mm. 6. Mosquito net according to any one of the preceding claims, characterized in that it comprises an arrival profile (9), which is located on the opposite edge of the window or French window with respect to the box (1). 7. Mosquito net according to claim 6, characterized in that in the arrival profile (9) restraint devices (13) are provided to lock the handle bar (10) in an arrival position in contact with said arrival profile (9). 8. Mosquito net according to claim 7, characterized in that in the arrival profile (9) magnetic restraint devices (13) are provided, to lock the handle bar (10) in the arrival position in contact with said arrival profile (9) . 9. Mosquito net according to any one of claims 6, 7 or 8, characterized in that it has devices (12) for adjusting the length of the wires (3.1 up to 3.n), in said arrival profile (9) constituting an upright arrival (9) in the case of a mosquito net for French windows; such length adjustment devices (12) being provided to compensate for any variation in the length of the wires (3.1 up to 3.n) due to thermal excursions. 10. Mosquito net according to any one of the preceding claims, characterized in that it comprises a group of the box (1) consisting of: - said box (1), constituting a profile open at the opposite ends, preferably in aluminum; - two caps (6, 6) for closing said opposite ends of the box (1); - said winding roller (2), centered or coaxial with respect to said covers (6, 6) and to the box (1), and having collars or bearings (2a) preferably distributed equidistant on the surface of the winding roller (2) itself for allowing its free rotation around its own longitudinal axis with respect to a stationary internal surface of the box (1); - a metric pitch screw (14), integral with a first hood (6) of said two hoods (6, 6), coaxial to said longitudinal axis of the winding roller (2), and whose thread engages with a internal threading of a threaded axial hole obtained at a first end of the winding roller (2); - an extension (6a), integral with a second hood (6) of said two hoods (6, 6) and coaxial to said longitudinal axis of the winding roller (2), this extension (6a) being inserted and locked in a first end of a preloaded return spring (5), constituting a torsion coil spring (5), the other end of which is rigidly inserted in a polygonal head pin (5a), in turn inserted by pressure and rigidly coupled in a second axial hole of complementary polygonal shape, obtained at a second end of the winding roller (2); in such a way that by rotating, the winder roller (2) can also perform a translation of an entity proportional to its instantaneous angle (Î ±) of rotation, by twisting and compressing or respectively decompressing the return spring (5), and in such a way that said wires (3.1 â € ¦ 3.n) fixed at one end to the winding roller (2) are wound without overlapping, around the latter, due to the preloading of the return spring (5), when the handle bar (10) it is not subject to traction forces of the user, while they are unwound by the winder roller (2) when the handle bar (10) is subject to a traction force of the user. 11. Mosquito net according to any one of the preceding claims, characterized in that said box (1) has, over its entire longitudinal extension, a continuous longitudinal opening for coupling with said part (11b) connected to the box (1), the which constitutes a net holder profile (11b) of a modular net group (4). 12. Mosquito net according to any one of the preceding claims, characterized in that said handle bar (10) has, over its entire longitudinal extension, a continuous longitudinal opening for coupling with said part (11a) connected to the handle bar (10), the which constitutes a net holder profile (11a) of a modular net group (4).