ES2907802T3 - Sliding screening device - Google Patents

Abstract

Sliding screening device, comprising: an upper guide (2) that hooks along an upper side of a window; a lower guide (3) that hooks along a lower side of the window; a screening assembly (4) comprising an upright (5), a movable bar (6) parallel to the upright (5) and a screening sheet (7) having mutually opposite end edges, which respectively engage the bar mobile (6) and to the upright (5); at least a first (8) and a second slider (9), each one supported by one of the opposite ends of the mobile bar (6) and which are respectively slidably hooked along the upper guide (2) and the lower guide (3), to guide the movement of the mobile bar (6) away from and towards the upright (5); stabilizer devices (40) to maintain the mobile bar (6) according to an orientation parallel to the upright (5); in which said stabilizer devices (40) comprise: at least one toothed pinion (41) that is rotatably hooked to the first slider (8) according to an axis of rotation parallel to the longitudinal extension of the mobile bar (6 ); a rack toothing (42) that operatively engages with the teeth of at least one toothed pinion (41) and that extends along a side wall of the upper guide (2) parallel to the direction of movement of the bar movable gear (6), further comprising at least one auxiliary toothed pinion (45), and an auxiliary rack toothing (46) that operatively engages with the teeth of at least one auxiliary toothed pinion (45) and extends along along the lower guide (3) parallel to the direction of movement of the mobile bar (6), characterized in that said at least one auxiliary toothed pinion (45) is hooked to the second slider (9) in a rotatable manner according to a respective axis of rotation perpendicular to the longitudinal extension of the mobile bar (6), and in that said sliding screening device further comprises anchoring members (28, 29) to fix at least the upright (5) with respect to a vertical side of the window, in which said members of anc laje (28, 29) comprise a lower anchor (29) that works between an end of the lower guide (3) and a lower end of the upright (5), in which the lower anchor (29) comprises a toothed insert (29a ) that is supported by the lower end of the upright (5) and is operatively engaged with the auxiliary rack toothing (46).

Description

DESCRIPTION

Sliding screening device

The present invention relates to a screening device, more specifically to an improved sliding screening device. More in detail, the invention particularly relates to mosquito nets, blackout curtains, decorative panels or similar devices for installation on windows, French windows or other types of window fittings in premises for residential or commercial use.

Screening devices of the type described above essentially comprise a screening sheet which is engaged between a first and a second section bar along two of their opposite sides respectively. One of the bars of the support section, generally known as a fixed stud or "roller shutter box", is suitable for fixing along one side of the window, French window or other opening in which the shutter is to be installed. device. The other bar of the support section, generally called "grab bar", is movable far and near to the fixed post, to bring the screen sheet selectively between an operative condition, in which it is stretched in the opening area , and a rest condition, in which it is rolled or compacted close to the fixed stud to free passage through the opening in which the protection device is installed. The opposite ends of the grip bar are normally guided along two guide bars, respectively upper and lower, which extend in the direction of movement.

An auxiliary strut, which is fixed along the side of the window opposite the fixed strut, supports magnetic or mechanical elements that are operatively engaged with the handlebar, to keep it in a usable condition. In many cases, stabilizing devices are also required that, for example, by means of one or more ropes or cables that are properly guided on respective returns, restrict the opposite ends of the handlebar so that the latter maintains a vertical orientation, without leaning uncontrollably. , also during the sheet stretching and return operations.

JP 2004204673 and EP 0489450 provide illustrative embodiments of screening devices, in which the stabilizing devices include sprockets provided on respective opposite ends of the handlebar, which engage respective racks provided along the upper guides. and bottom.

In the current state of the art, the use of stabilizing devices supposes an important structural complication of the mosquito net, with the consequent increases in production and installation costs. There are also problems related to assembly difficulties and the reduced installation versatility of mosquito nets. In fact, in the present mosquito nets, the constructive conception of the stabilizing devices turns out to be such that it requires a sensible and precise adjustment of the cables and/or of the respective transmissions during installation.

These operations necessarily involve long execution times and require the use of expert operators. The necessary use of skilled operators also prevents the mosquito net from being easily removed and reassembled by the end user, for example, for cleaning and maintenance operations, or for storage in the winter season or other periods of inactivity. It follows that the mosquito net remains permanently exposed to the elements, even for long periods when its presence is not necessarily required, such as during the winter seasons.

Additional problems may arise in the not infrequent cases where the user wishes to reverse the direction of the mosquito net opening.

The object of the present invention is to improve the state of the art by proposing a mosquito net that has effective stabilizing devices, the presence of which does not impair the ease of installation and use of the same mosquito net.

Another object of the invention is to propose a structurally simplified one, which lends itself to being installed more simply.

Another purpose of the invention is to make a mosquito net that is suitable for being easily disassembled and reassembled by the end user, without the intervention of qualified operators.

Another purpose of the invention is to propose a mosquito net that is suitable for mounting indistinctly in one or the other direction to allow its opening from the right or from the left, depending on the requirements. A mosquito net is also proposed that, whenever required, lends itself to being easily disassembled and reassembled by the user in the event that it is desired to change the opening direction.

More specifically, the object of the present invention is a sliding screening device, according to claim 1.

The invention may further comprise at least one of the following preferred features.

Preferably, the stabilizer devices further comprise mechanical transmission members operating between the pinion gear and the auxiliary pinion gear to synchronize the movements of the first and second slider respectively along the upper and lower guide.

Preferably, said mechanical transmission members comprise a kinematic chain that is configured to transmit rotary motion from the pinion gear to the auxiliary pinion gear, and vice versa.

Preferably, said mechanical transmission members comprise a kinematic chain that is configured to drive the auxiliary pinion gear according to a peripheral speed equal to the peripheral speed of the pinion gear, and vice versa.

Preferably, the kinematic chain comprises a transmission shaft that extends along the moving bar and is operatively connected to the pinion and the auxiliary pinion gear.

Preferably, the transmission shaft and the pinion are connected to each other by means of a pair of upper gear wheels, respectively, which are supported by the same pinion and by an upper end of the transmission shaft. Preferably, the transmission shaft and the auxiliary pinion are mutually connected by a first pair of gears that are respectively supported by the transmission shaft and by a return bushing that rotatably engages on the moving bar, and a second pair of sprockets supported respectively by the return hub and the auxiliary sprocket.

Preferably, the transmission hub is rotatably supported according to an axis of rotation parallel to an axis of rotation of the transmission shaft.

Preferably, at least one of said first and second gear wheels is a bevel pair.

Preferably, the rack toothing and/or the auxiliary rack toothing is defined by at least one toothed belt.

Preferably, the toothed belt is fixed along an inner side wall of the upper guide.

Preferably, at least one tooth of the toothed pinion is interposed in contact relationship between two consecutive teeth of the rack toothing.

Preferably, the teeth of the rack and pinion gears each have a longitudinal extension parallel to the axis of rotation of the pinion gear.

Preferably, each tooth of the rack toothing and of the toothed pinion have a longitudinal extension of at least 5 mm.

Preferably, the axis of rotation of the toothed pinion is in a central longitudinal plane of the upper guide.

Preferably, the first slider supports at least two toothed pinions equidistant from a central longitudinal plane of the upper guide.

Preferably, each of said pinions operatively engages a respective rack toothing.

Preferably, the first slider supports at least two pairs of toothed pinions, said pairs being equidistant from a central longitudinal plane of the upper guide.

Preferably, retaining devices are also provided to counteract the sliding of the mobile bar relative to the guides themselves.

Preferably, said retention devices are configured to hold the mobile bar in any fixed position along the upper and lower guides.

Preferably, the retaining devices comprise a coupling joint comprising a rotating collar that engages rigidly along the drive shaft, and a locking collar that is rotatably traversed by the drive shaft.

Preferably, the locking collar is slidably engaged along the movable drive shaft between a disengaged position in which it moves away from the rotating collar, and an engaged position in which the axial projections and clutch seats that they are supported respectively by the rotating collar and the locking collar which interlock with each other to block the rotation of the transmission shaft.

Preferably, the locking collar is mobile along the transmission axis by order of at least one knob that protrudes externally from the mobile bar.

Preferably, the locking collar is rotatably fixed with respect to the handlebar.

Preferably, said retaining devices operate between at least one of the sliders and the respective upper and/or lower guide.

Preferably, the retention devices comprise at least one shoe that is supported by the mobile bar and that works in an elastic thrust relationship along a lower edge of the upper guide.

Preferably, the runner is elastically pushed by a spring that is housed in an integral casing of the mobile bar and that houses the same runner in a slidable manner towards the upper guide.

Preferably, the shoe is configured to be releasably inserted in at least one niche that is formed along the lower edge of the upper guide and/or in at least one of the coupling terminals.

Preferably, said retention devices comprise at least one friction surface that is arranged on the slider and at least one clamping member that works between the pinion gear and the slider itself, to axially push the pinion gear and the friction surface against each other.

Preferably, said clamping member comprises a threaded pin rotatably passing through the toothed pinion.

Preferably, at least one elastic insert is operatively interposed between the slider and the pinion gear to elastically push the friction surface against the pinion gear itself.

Preferably, the elastic insert comprises at least one elastic washer or a Belleville washer coaxial with the toothed pinion.

Preferably, the anchor members comprise an upper anchor operating on one end of the upper guide and on an upper end of the post, and said lower anchor operating on one end of the lower guide and on a lower end of the post.

Preferably, said anchoring members comprise inserts that are disposed near opposite ends of at least one of said upper guide and lower guide.

Preferably, each of said inserts has a latching portion supporting a sealing seat and a ramp portion decreasing in thickness from the sealing seat.

Preferably, at least the first inserts can be slidably positioned and releasably fixed along a longitudinal slot provided in the lower guide.

Preferably, the removable latching devices operate between at least one of the sliders and a respective end of at least one of said upper and lower guides.

Preferably, the removable latching devices comprise at least one latching member that is supported by the first and/or second slider and operatively engages with a respective grip seat.

Preferably, the grip seat is supported by an insert that is releasably fixed with respect to the respective lower and/or upper guide.

Preferably, said latching member comprises a magnet and the sealing seat comprises a tab protruding from one end of the insert.

Preferably, the post, in a section of its extension extending from the upper anchor to the lower anchor, approaches along the respective vertical side of the window in the absence of additional fixing elements.

Preferably, at least one of said upper and lower guides comprises a section bar having at least one end that engages with respect to a coupling terminal.

Preferably, the end of the section bar and the coupling terminal are mutually connected in a sliding latching relationship.

Preferably, the opposite ends of the section bar engage the respective coupling terminals.

Preferably, each docking terminal is configured to be attached to the window. Preferably, each coupling terminal can be fixed to the window, at an angle that is formed by the upper or lower side, with one of the vertical sides.

Preferably, each coupling terminal has a cover that engages the end of the top guide and a closing end wall that can be rigidly engaged in the corner of the window.

Preferably, the protector has at least one open side that extends between two peripheral edges projecting towards each other, so that each one forms a notch.

Preferably, the end of the upper guide can be hooked by forced insertion through the open side, possibly imposing an elastic partition on the protector at the protruding perimeter edges, to hook the terminal edges of the opposite wings of the guide in the respective notches. upper, so that it is retained in the protector.

Preferably, biasing devices are also provided which are configured to push opposite ends of the upper guide away from each other.

Preferably, said pushing devices operate between the section bar and the coupling terminal at at least one of the opposite ends of the upper and/or lower guide, to push said section bar and coupling terminal in opposite directions respectively.

Preferably, the push devices comprise a base body that is supported by one of the ends of the section bar, and a push insert that is slidably hooked to the base body and movable along an extension direction. longitudinal part of the section bar, through the action of a rotatably drivable control spindle.

Preferably, the control spindle extends parallel to the longitudinal extent of the section bar and rigidly supports a bevel drive wheel operatively engaging a bevel control wheel, which bevel drive wheel is rotatably drivable about an axis perpendicular to the longitudinal extent of the section bar.

Preferably, said top anchor operates between the top end of the post and one of said coupling terminals.

Preferably, the upper anchor comprises at least one clutch seat that is defined against the closure wall of each coupling terminal, to accommodate a gripping portion that is defined at the upper end of the post, preferably by insertion along a direction parallel to the longitudinal extension of the same stud.

Preferably, the lower anchor comprises at least one hooking pin that protrudes inferiorly from a lower end insert that is supported by the post and that engages in the sealing seat of the respective insert, to firmly restrain the lower end of the same post.

Preferably, the upper guide, the lower guide, and possibly also the anchoring members, are mirror-symmetrical with respect to a median vertical plane transverse to the longitudinal extent of the upper and lower guides.

Preferably, the movable bar is slidably engaged between the upper guide and the lower guide together with the mounting bracket.

Other features and advantages will become more apparent from a preferred, but not limiting, detailed description of an embodiment of a screening device in accordance with the present invention.

Said description will be established below with reference to the attached drawings that are given for illustrative purposes only and, therefore, not limiting, in which:

Figure 1 schematically shows in perspective view a screening device according to the present invention, with the respective screening sheet partially extended in an operative condition; - Figure 2 shows a section of a construction detail showing an upper anchorage between the upright and the upper guide of the device;

- Figure 3 shows a section of a construction detail showing a lower anchor between the upright and a lower guide according to the invention and presented solely for illustrative purposes;

- Figure 4 shows in perspective and in partial section another enlarged detail showing the upper anchorage; - Figure 5 shows a perspective view of one of the coupling terminals that are arranged at the ends of the upper guide;

- Figure 6 shows a perspective view of a detail that shows the hooking devices between the end of the lower guide and the second slider that is located under the mobile bar;

- Figure 7 shows a partially interrupted perspective view of a detail showing the second slider that is arranged at the lower end of the mobile bar;

- Figure 8 shows a partially interrupted perspective view of a detail showing the first slider that is arranged at the upper end of the mobile bar, according to a first embodiment;

- Figure 9 is a detail sectional view of Figure 8;

- Figure 10 shows a partially interrupted perspective view of a detail showing the first slider that is arranged at the upper end of the mobile bar, according to an illustrative embodiment;

- Figure 11 shows a partially interrupted perspective view of a detail showing the first slider that is arranged at the upper end of the mobile bar, according to a third illustrative embodiment; - Figure 12 shows in perspective view providing an illustrative embodiment with retention devices operating between the lower guide and the second slider;

Figure 13 shows a discontinuous perspective view of a preferred embodiment variant, which is equipped with mechanical transmission members to synchronize the movements of the first and second slider respectively along the upper guide and along the lower guide;

- Figure 14 shows a discontinuous perspective section of said preferred embodiment, showing the coupling between the upper guide and the upper end of the upright;

- Figure 15 shows an interrupted perspective section of the embodiment of Figure 13, showing the engagement of the end of the upper guide with a corresponding angle of the window;

Figure 16 shows an interrupted perspective section of the embodiment variant of Figure 13, showing the engagement of the end of the lower guide with the corresponding end of the upright;

- Figure 17 shows an interrupted perspective section of the embodiment of Figure 13, showing the coupling between a transmission shaft and a toothed pinion that is supported by a first slider of the mobile bar;

- Figure 18 shows an interrupted perspective section of the embodiment of Figure 13, showing the coupling between the transmission shaft and an auxiliary pinion that is supported by a second slider of the mobile bar; Figure 19 shows an interrupted perspective section of the variant embodiment of Figure 13, showing the retaining devices operating along the transmission axis.

With reference to the attached figures, 1 globally indicates a screening device according to the present invention.

In the illustrated example, the screening device 1 lends itself to being installed in the opening that defines a window or French window (not shown in the drawings) to perform mosquito net functions, that is to say to prevent the passage of flies, mosquitoes and other insects or small animals through the same opening.

To this end, the screening device 1 essentially comprises an upper guide 2 hooking along an upper side of the window, a lower guide 3 hooking along a lower side of the window, and an assembly screen 4, preferably pre-assembled, which is operatively hooked between the upper guide 2 and the lower guide 3.

The screening assembly 4 comprises an upright 5, which is constituted, for example, by at least one bar with a tubular section that can be fixed along a vertical side of the window on which the screening device 1 is to be installed.

The upright 5 is arranged parallel to a mobile bar 6, which can also be made in the form of a bar with a tubular metal section.

A screening sheet 7 has two opposite end edges which respectively engage with the upright 5 and the moving bar 6.

The screening sheet 7 can be made, for example, in the form of a net of synthetic material having mesh sizes indicatively between 0.3 mm and 2 mm, or in any case to provide a effective barrier to the passage of small insects such as ants and mosquitoes, which favor adequate air permeability.

In the illustrative embodiment illustrated, a first end edge of the screening sheet 7 is rigidly fixed to an anchor element (not shown) that is supported by the movable bar 6. A second end edge is hooked to its Once a winding roller (not shown) is operatively arranged within the upright 5 and subjected to the action of elastic means that tend to rewind the screened sheet 7 on the same winding roller. The pre-assembly of the screening sheet 7 with the upright 5 and the mobile bar 6 for the purpose of obtaining the screening assembly 4 can be carried out, for example, at the production site or at an authorized distributor.

The mobile bar 6 lends itself to being moved manually, which moves away and approaches the upright 5. The withdrawal of the mobile bar 6 from the upright 5 determines the unwinding of the screening sheet 7 and its extension in the rest plane of the window on which the screening device 1 is installed, as opposed to the action of the elastic recovery means associated with the winding roller. On the other hand, when the moving bar 6 is brought closer to the upright 5, the screening sheet 7 is rewound within the same upright 5, by the action of said elastic recovery means.

However, the possibility of using, instead of the winding roller, a screening sheet 7 to be spread and compacted in an accordion fashion is not excluded.

The mobile bar 6 is guided along the upper and lower guides 2, 3, by means of a first slider 8 and a second slider 9 which are each supported by one of the opposite ends, respectively upper and lower, of the same moving bar 6.

The upper guide 2 comprises a section bar 2a preferably having a substantially "inverted" U-shaped cross-section, having a base portion 10 from the side edges of which extend two opposite wings 11 between which the first slider is housed 8, to hide from the view of the observer.

In a preferred embodiment, the upper guide 2 further comprises a pair of coupling terminals 12, which are preferably connected in a sliding engagement relationship with the opposite ends of the section bar 2a and which are fixed to the window, each one in a of the corners formed by the upper side with each of the vertical sides.

Each coupling terminal 12 preferably has a closing end wall 13, from which a cover 14 extends perpendicularly, partially circumscribing the end of the section bar 2a belonging to the upper guide 2.

Preferably, the cover 14 has at least one open side 14a which extends between two mutually projecting perimeter edges 15, each to form a notch 15a. The open side 14a allows the forced insertion of the end of the upper guide 2 towards the interior of the cover 14, in a transverse direction to the longitudinal extension of the upper guide itself, which imposes an elastic division on the cover 14 at the perimeter edges 15 outgoing. When the insertion is complete, the projecting perimeter edges 15 elastically engage in the respective notches 15a of the end edges of the opposite wings 11 of the upper guide 2, so that it is retained in the cover 14.

Each coupling terminal 12 can be rigidly engaged in a respective corner of the window, for example, by means of a spindle which works through a hole 13a which is formed in the closing end wall 13, and possibly which is combined with an expansion fixing pin.

Alternatively, the mating terminal 12 may be attached by gluing or interposing double-sided adhesive tape.

In addition, or as an alternative, as exemplified in Figures 13 to 15, the fixing of the coupling terminals 12 and of the upper guide 2 as a whole, can take place by friction developed against the corresponding side of the window.

For example, pushing devices 16 may be provided which are configured to push opposite ends of the upper guide 2, with possible coupling terminals 12, away from each other. Pushing devices 16 preferably operate between section 2a and coupling terminal 12 at at least one of the opposite ends of upper guide 2, so that the same section and coupling terminal are pushed in opposite directions respectively.

For this, the push devices 16 preferably comprise a base body 17 that is supported by one of the ends of the section bar 2a. For example, the base body 17 can be fixed to the section bar 2a by means of threaded members or by interlocking. The base body 17 has a guide seat 17a in which slidably engages a push insert 18. The push insert 18 is movable in the guide seat 17a along a longitudinal extension direction of the section bar 2a, by the action of a control spindle 18a rotating through the same base body and operatively engages in a threaded hole provided in the same push insert 18.

Control spindle 18a extends parallel to the longitudinal extent of section bar 2a and rigidly supports a drive bevel gear 19 which operatively engages with a bevel control wheel 20. Bevel control wheel 20 is rotatably engaged in a housing 17b which is provided in the base body 17 and has, on its own side opposite the base wall 10, an axial coupling seat 20a accessible from an opening defined between the wings 11 of the bar section 2a.

With the aid of a screwdriver or other suitable hand tool that engages with the axial coupling seat 20a, the drive bevel 19 lends itself to be rotatably driveable about its own axis perpendicular to the longitudinal extent of the drive rod. section 2b. The rotary drive of the driving conical wheel 19 causes the rotary drive of the control spindle 18a and the consequent displacement of the thrust insert 18 along the guide seat 17a which is provided in the base body 17. Therefore, the thrust insert push 18 lends itself to being pushed against the respective coupling terminal 12 on the closing front wall 13, which pushes the same coupling terminal against the corresponding side of the window. At the same time, the base body 17, together with the section 2a, is pushed towards the coupling terminal 12 which is mounted at the end opposite to that which supports the pushers 16, which push the same coupling terminal against the corresponding side of the window. The opposing thrusts that are exerted through the coupling terminals consequently cause the locking of the upper guide 2 by friction against the corresponding sides of the window.

Similarly to what is described above, the pushing devices 16 can optionally equip the lower guide 3, in addition to or as an alternative to the upper guide 2.

The lower guide 3, which is located along the lower horizontal side of the opening, has a substantially flattened cross-sectional profile, with the longest side substantially perpendicular to the plane in which the screening sheet 7 lies in the extended state. . More specifically, it is envisaged that the lower guide 3 has a base portion 21 that bears against the corresponding lower side of the window. From the base portion 21 protrudes above, preferably in a centered position, at least one longitudinal relief 22 that slidably engages with a lateral retaining groove 23 that is arranged on a lower surface of the second slider 9. The sides laterally opposite sides of the longitudinal relief 22 lend themselves to acting against the respective lateral surfaces of the containment groove 23, to guide the second slider 9 along a rectilinear path along the longitudinal extension of the lower guide 3.

As exemplified in Figure 7, one or more pairs of slider rollers 24 may be provided which are rotatably supported by the second slider 9. The slider rollers 24 act along opposite longitudinal strips of the base portion 10, to facilitate the translation of the same slider along the lower guide 3. The opposite longitudinal bands of the base portion 10 are each interposed between the second slider 9 and the lower side of the window, to protect the lower side of the window. window of the sliding contacts with the second slider 9.

The lower guide 3 also lends itself to hooking a mobile containment member 25, which is designed to protect the corresponding lateral edge of the screening sheet 7. The mobile containment member 25 has a first portion that is fixed to one of said bar movable 6 and post 5, and a second portion that is slidably guided along the other of said movable bar 6 and post 5. More particularly, in the illustrated embodiment, the first portion of the movable containment member 25 is constrained terminally to a terminal insert 26 that is fixed to the lower end of the vertical post 5, while the second portion is slidably housed inside the mobile bar 6.

The mobile containment member 25 is dragged longitudinally with the movement of the mobile bar 6, to extend its first portion along the corresponding lateral edge of the screening sheet 7, which thus remains slidingly engaged in a longitudinal housing that is defined in the same mobile containment member 25, and suitably retained in relation to lateral and/or vertical displacements. In a manner known per se, the mobile containment member 25 can be made, for example, in the form of a flexible band of plastic material, or by a plurality of mesh elements 27 that are consecutively linked in the form of a chain, to lend themselves to bending. easily to divert its path of movement entering and leaving the mobile bar 6, in the transition zone between the first section and the second section.

The screening device 1 further comprises anchoring members 28, 29, to fix the upright 5 with respect to one of the vertical sides of the window.

More particularly, an upper anchor 28 and a lower anchor 29 are provided for the strut 5. Preferably, the upper anchor 28 functions between an upper end of the strut 5 and an end of the upper guide 2, preferably at the respective coupling terminal 12. The lower anchor 29 works between a end of the lower guide 3 and a lower end of the upright 5. In a section of its extension that extends from the upper anchor 28 to the lower anchor 29, the upright 5 preferably approaches along the respective vertical side of the window in the absence of additional fixing elements.

In the illustrated examples, the upper anchor 28 provides for the presence of at least one clutch seat 30 which is defined near the closing end wall 13 of each coupling terminal 12, for example, by means of one or more ribs 31 protruding internally from the cover 14 parallel to the end wall itself. The clutch seat 30 itself lends itself to receiving a gripping portion 32 defined at the upper end of the strut 5, preferably by insertion along a direction parallel to the longitudinal extension of the strut itself. The grip portion 32 can be made directly on the tubular section bar that constitutes the upright 5, as exemplified in Figure 2, or in a terminal insert 5a that is fixed to the end of the upright itself, as exemplified in Figure 14. In the embodiment best represented in Figures 1 and 3, the lower anchor 29 can in turn provide the use of at least one, preferably two inserts 33 that are removably fixed to the lower guide 3, each one against one of the ends of the latter. Each insert 33 is slidably engaged along a longitudinal groove 34 that is formed in the longitudinal relief 22 of the lower guide 3 and is locked, for example, by means of a threaded pin 35 at the corresponding end of the same guide. bottom 3. Each insert 33 has an engaging portion 33a supporting a sealing seat 36, for example made in the form of a through hole, and a ramp portion 33b having a thickness decreasing from the sealing seat 36.

As best illustrated in Figure 3, a hooking pin 37 projecting inferiorly from the terminal insert 26 which is supported inferiorly by the post 5 lends itself to engage in the sealing seat 36 of the respective insert 33, to firmly restrain the lower end of the pillar 5.

According to the invention best represented in Figure 16, the lower anchor 29 takes advantage of the presence of an auxiliary rack 46 that is arranged along the lower guide 3. More particularly, the lower anchor 29 comprises a toothed insert 29a that is supported by the lower end of the upright 5 and which is operatively engaged with the auxiliary rack toothing 46.

Preferably, the toothed insert 29a is fixed removably with respect to the post 5, for example, on the terminal insert 26. The toothed insert 29a lends itself to being easily removed or omitted to allow sliding engagement of the post 5 with respect to the guide. lower 3, for example, when the screening device 1 provides the use of two or more screening assemblies 4 which are arranged one after the other along the lower 3 and upper 2 guides. In this case, the upright 5 of a second screening assembly 4 can be fixed to the mobile bar 6 of a first screening assembly 4, the latter having its own upright 5 which is fixed against one of the vertical sides by the opening in which the screening device 1 is ride.

As best illustrated in Figures 6 and 7, the mobile bar 6 can be associated with removable hooking devices 38, 39, which preferably operate between at least one of the sliders 8, 9 and a respective end of each of said upper guide. 2 and lower guide 3. The removable latching devices preferably comprise at least one latching member 38 that is supported by the second slider 9 and that operatively engages with the insert 33 that is mounted on the end of the lower guide 3 opposite the upright 5. As exemplified in Figure 6, a possible preferred embodiment provides for this purpose, that the hooking member 38 comprises a magnet and the insert 33 has a tab protruding from its own end to define a grip seat 39. In a possible embodiment variant that is not shown, the function of the gripping seat 39 can be carried out by said sealing seat 36, which is arranged to receive a small and sphere that constitutes the hooking member 38, which is elastically pushed towards the lower guide 33. When the mobile bar 6 moves away from the upright 5, it reaches near the vertical side of the window opposite the upright itself, the hooking member 38 that is supported by the second slider 9 interacts with the grip seat 39, made of metallic material to magnetically hold the mobile bar 6 in the condition of approaching the respective vertical side of the window, on the opposite side to the upright 5, with the sheet screening 7 in extended condition. Furthermore, near the upper end of the moving bar 6, the latching devices 38, 39 may provide a similar mechanical or magnetic restraint system, which operates between the upper end of the moving bar itself and the coupling terminal 12.

It can conveniently be provided that the upper guide 2, the lower guide 3 and preferably also the anchoring members 28, 29, 33, are mirror-symmetrical with respect to a median vertical plane of the screening device 1. This center line is transverse to the longitudinal extension of the upper 2 and lower 3 guides.

Furthermore, stabilizer devices 40 are conveniently provided which are configured to maintain the movable bar 6 in accordance with an orientation parallel to the post 5. In other words, the stabilizer devices 40 lend themselves to counteract any abnormal stress imposed on the strut. mobile bar 6 during its movement towards and away from the fixed upright 5, to prevent it from mobile bar to tilt and/or oscillate undesirably in the rest plane of the screening sheet 7, which assumes an inclined orientation with respect to a vertical direction.

As exemplified in Figure 1 and Figures 8 to 11, the stabilizer devices 40 operate at least between the upper guide 2 and the upper end of the mobile bar 6. The stabilizer devices 40 comprise at least one toothed pinion 41 that is hooks to one of the sliders 9, in the example described to the first slider 8, rotatably along an axis of rotation parallel to the longitudinal extension of the mobile bar 6. The toothed pinion 41 is that it hooks operatively with a rack toothing 42, which extends along the upper guide 2 parallel to the direction of movement of the mobile bar 6. The rack toothing 42 can advantageously be defined by a toothed belt 43, more specifically a piece of it is preferably fixed along an inner wall of the upper guide 2, for example, on one of its wings 11. The toothed belt 43 can be fixed, for example, by gluing.

As exemplified in Figures 8 and 9, the toothed pinion 41 can be arranged with its own axis of rotation coplanar with a central longitudinal plane M of the mobile bar 6 and/or of the upper guide 2, and/or equidistant from the walls. inner at 11 o'clock on top guide 2.

According to possible embodiments exemplified in Figures 10, 11 and 13, two or more toothed pinions 41 can be provided, preferably equidistant from the central longitudinal plane M of the upper guide 2. In the examples of Figures 10, 13 and 17, provide two toothed pinions 41, while Figure 11 shows a possible alternative embodiment providing the use of two pairs of toothed pinions 41, which are arranged equidistant from the longitudinal center line M of the upper guide. 2. In both cases, the use of a single rack toothing 42, which works in engagement with only one of the two toothed pinions 41 as shown in Figure 10, can be provided. In a configuration such as that shown in Figure 11, a single rack toothing 42 can work in engagement with only one of the pairs of pinions 41, which are arranged on the same side with respect to the longitudinal axis M of the upper guide 2.

Alternatively, as shown in Figures 11, 13 and 17, the presence of two racks 42 can be provided, which are each anchored to one of the wings 11 of the upper guide 2. In the latter case all the toothed pinions 41 work in a hooking relationship, each one with one of the rack teeth 42, to favor the dynamic balance of the system.

The use of two toothed pinions 41 and/or two rack teeth 42 opposite with respect to the longitudinal plane M of the upper guide 2, however, favors a correct engagement between the rack teeth 42 and the respective pinion 41, regardless of the direction of the shown orientation of the movable bar 6. In other words, the movable bar 6 can be hooked to the upper guide 2 according to two orientations rotated respectively by 180° to allow the opening of the mosquito net 1 from the right and from the left respectively, which ensures in both cases the engagement of the rack toothing 42 with the teeth of the respective pinion 41.

In operating conditions, at least one tooth of the toothed pinion 41 is interposed in a contact relationship between two consecutive teeth of the rack toothing 42. In this circumstance, the toothed rack 42 holds the toothed pinion that favors the maintenance of the mobile bar. 6 in vertical orientation, even in the presence of forces transmitted manually by the user during the stretching and retracting operations of the screening sheet 7.

To favor the operation described above to stabilize the mobile bar 6, it is preferable that each tooth of the rack 42 and of the toothed pinion 41 has a longitudinal extension parallel to the axis of rotation of the same toothed pinion.

The stabilization of the mobile bar 6 is also tendentially favored with the increase in the length of the teeth of the rack and pinion 42. In this regard, it is preferable that the teeth of the rack and pinion gears have a longitudinal extension equal to or greater than 5 mm.

As exemplified in the embodiments illustrated in Figure 12 and Figures 13 to 19, the stabilizer devices 40 further comprise at least one auxiliary toothed pinion 45 that engages in the second slider 9 in a rotatable manner according to an axis of rotation respectively, perpendicular to the longitudinal extension of the mobile bar 6, and an auxiliary rack 46 that operatively engages with the teeth of the auxiliary toothed pinion 45. The auxiliary rack toothing 46, which can also be formed by a section of toothed belt, is extends along the lower guide 3 parallel to the direction of movement of the mobile bar 6.

Preferably, as best exemplified in figures 13, 17 and 18, the stabilizer devices 40 further comprise mechanical transmission members 60 operating between the pinion gear 41 and the auxiliary pinion gear 45 to synchronize the movements of the first and second slider 8 , 9 respectively along the upper and lower guide 2, 3.

Mechanical transmission members 60 preferably comprise a powertrain 61 that is configured to transmit rotary motion from pinion gear 41 to pinion gear 45, and vice versa. More particularly, the powertrain 61 may be configured to operate the auxiliary pinion gear 45 in accordance with a peripheral speed equal to the peripheral speed of the pinion gear 41, and vice versa.

For example, the kinematic chain 61 may comprise a transmission shaft 62 which is rotatably supported within the mobile bar 6, which extends along the latter and which is operatively connected with the pinion 41 and the auxiliary pinion gear. Four. Five.

Preferably, the transmission shaft 62 and the auxiliary pinion 45 are mutually connected by a first pair of gear wheels 63 and a second pair of gear wheels 64. The gear wheels belonging to the first pair 63, preferably cylindrical, which are respectively supported by the transmission shaft 62 and by a transmission hub 65 that are rotatably engaged in the mobile bar 6, preferably along an axis of rotation parallel to an axis of rotation of the transmission shaft 62.

The gear wheels belonging to the second pair 64, preferably forming a conical pair, which are respectively supported by the transmission hub 65 and the auxiliary gear pinion 45.

The transmission shaft 62 and the pinion 41 are in turn mutually connected by a pair of upper gear wheels 66, preferably cylindrical, which are respectively supported by the same pinion and by an upper end of the transmission shaft 62.

The presence of the kinematic chain 61 favors a stable maintenance of the mobile bar 6 according to a vertical orientation or in any case parallel to the upright 5, also in the presence of imbalances in the tensions that are transmitted respectively through the first and second slider 8, 9 during movement.

In addition, retention devices 44 can be conveniently provided to adequately counteract the sliding of the mobile bar 6 with respect to the upper 2 and/or lower 3 guide. The action of the retention devices 44 can favor the regularity of the sliding of the mobile bar. 6 during movement, both in the presence and absence of the transmission kinematic chain 61, and/or suitably counteract the elastic return action exerted on the screening sheet 7 so that the same mobile bar, in the absence of tension from the of the user, it can be placed in any position spaced from the fixed upright 5.

As exemplified in Figures 9 and 12, the retention devices 44 can function between at least one of the sliders 8, 9 and the respective upper 2 and/or lower 3 guide. More in detail, at least one of the upper sliders 8 and lower 9 have a friction surface 47, 48 and a respective clamping member 49, 50 operating between the pinion gear 41, 45 and the slider itself, to push the pinion gear and the friction surface axially with respect to each other.

The clamping member 49, 50 may comprise a threaded pin which passes coaxially and rotatably through the respective pinion gear 41, 45 and engages by screwing into the first and/or second slider 8, 9. As exemplified in Figure 9, the friction surface may be defined on opposite sides of an elastic insert, for example, a spring washer or Belleville washer 47, which is elastically compressed between a side wall of the pinion gear 41 and the respective slider 8, so that the friction surface is pushed against the same toothed pinion.

Alternatively, as exemplified in Figure 12, the friction surface can be defined by opposite walls of a seat 50 that is arranged in the slide for lateral containment of the auxiliary pinion gear 45, which is compressed between said opposite walls, elastically deformable by the action of the clamping member 50. In both cases, by screwing or unscrewing the clamping member, it is possible to precisely adjust the opposing resistance of the pinion 41, 45 to the displacement of the mobile bar 6, in order to favor the stability of the bar itself when released in the use position, or in any intermediate position between the use position and the rest position, without penalizing softness.

As best exemplified in Figure 19, the retention devices 44 can be configured to hold the mobile bar 6 in any fixed position along the upper 2 and lower 3 guide.

For example, retaining devices 44 may comprise a coupling joint 51 comprising a rotating collar 52 that engages rigidly along drive shaft 62, and a locking collar 53 that is rotatably traversed along the same axis. of transmission.

The rotating collar 52 and the locking collar 53 are respectively provided with axial projections 53a and complementary clutch seats 52a respectively, mutually engaging by axial insertion.

The locking collar 53, rotatably fixed with respect to the movable bar 6, is slidably engaged along the transmission shaft 62 and movable between a disengaged position, in which it moves away from the rotating collar 52, so that axial projections 53a disengage from clutch seats 52a, and an engaging position in which said axial projections 53a and clutch seats 52a engage each other. In the engaged position, the rotation of the transmission shaft 62 is blocked and, consequently, the engagement of the pinion gear 41 and the auxiliary pinion gear 45 with the respective racks 42, 46 and through the kinematic chain 51 prevents the sliding of the sliders 8, 9 along the respective upper 2 and lower 3 guides.

The locking collar 53 is movable along the transmission axis 62 by command of at least one knob 54 protruding externally from the movable bar 6. In the illustrated example, two knobs 54 are provided, respectively protruding from opposite sides. Each knob 54 can also act as a grip element to move the mobile bar 6 and supports at least one fixing pin 55 that is rigidly connected to the locking collar 53 through a sliding slot 56 that is formed in the mobile bar 6. The mutual engagement between the fixing pin 55 and the sliding groove 56 causes the locking collar to be rotatably fixed with respect to the moving bar 6. In addition, or as an alternative to what has been described above, the retaining devices 44 can comprise at least one runner 57 that is supported by the mobile bar 6 and that works in an elastic thrust relationship along a lower edge 11a of the upper guide 2. The runner 57 can be elastically pushed by a spring (which not shown) which is housed inside a casing 58 integral with the mobile bar 6 and which houses the same slider in a slidable manner towards the upper guide 2. The slider 57 can be arranged to be inserted removably and n at least one niche of suitable depth (not shown), which is made, for example, along the lower edge 11a of the upper guide 2 and/or in at least one of the coupling terminals, for example, on the perimeter edge 15 of the respective cover 14, to hold the mobile bar in a stretching position of the sheet or any other predetermined position.

The installation of the screening device 1 provides that the upper guide 2 and the lower guide 3 are respectively fixed along the upper and lower sides of the window, after performing possible cutting operations according to a measurement substantially the same or slightly inferior to the development of the same sides. The fixing of the lower guide 3 can be obtained, for example, by gluing, for example with the help of a double-sided adhesive tape.

Instead, the fixing of the upper guide 2 is preferably carried out by first fixing each of the coupling terminals 12 against a respective corner of the window. The cover 14 of each coupling terminal 12 is supported against the upper side of the window, while the respective closing wall 13 is fixed against the end of the corresponding vertical side. The upper guide 2 can then be fixed against the upper side which presses its opposite ends into the covers 14 of the coupling terminals 12, to be retained by the notches 15a that are defined by the terminal edges 15. The terminals 33 are fixed near the respective opposite ends of the lower guide 3.

The preassembled screening assembly 4 lends itself to being operatively coupled to the lower 3 and upper 2 guides that are previously installed. For this, the screening assembly 4 is arranged between the upper guide 2 and the lower guide 3, according to an orientation substantially coplanar to them and initially inclined in the rest plane of the window, so that the grip portion 32 defined at the upper end of the upright 5 is placed in the hooking seat 30 that is arranged in one of the coupling terminals 12. The screening assembly 4 is then oriented parallel to the vertical sides of the window, which determines the insertion of the gripping portion 32 inside the clutch seat 30. Upon reaching the vertical orientation, the hitch pin 37 is also inserted into the sealing seat 36 of the respective insert 33 previously fixed to the end of the lower guide 3.

The upright 5 is fixed in this way firmly with respect to the respective vertical side of the window, by means of the upper anchor 28 and the lower anchor 29 operating on the respective ends of the upper 2 and lower 3 guide. At the same time, the mobile bar 6 is slidably engaged with the upper 2 and lower 3 guide, by means of the first and second sliders 8, 9 which are supported by the opposite ends of the mobile bar 6. An elastic deformability of the wings of the upper guide allows the slider to be inserted in an inclined state between the same wings. When the mobile bar and the upright are brought to assume a vertical orientation, the elastic return of the wings in an undeformed state favors the correct operative engagement of the rack 42 with the respective toothed pinion 41.

The symmetry of the upper guide 2, of the lower guide 3, of the sliders 8, 9 and of the anchoring members 28, 29, 33, with respect to the vertical axis of the window and of the screening device 1, causes the assembly screen 4 to be mounted indistinctly to provide the opening of the mobile bar 6 in one or another direction, that is to say from right to left or vice versa.

The screening assembly 4 also lends itself to being easily removed from the upper and lower guides 2, 3, by means of a simple sequence of actions in the reverse order to those performed for assembly purposes. These operations can also be easily performed by the same user. The user therefore has the possibility of easily removing the screening assembly 4 for cleaning, maintenance and/or storage operations. After any removal of the upper guide 2, the disassembly and assembly of the device 1 is also carried out with an opening direction reversed with respect to the previous one, without the need to resort to skilled operators.

Claims (10)

1. Sliding screening device, comprising: a top guide (2) that engages along a top side of a window; a lower guide (3) that hooks along a lower side of the window; a screening assembly (4) comprising an upright (5), a movable bar (6) parallel to the upright (5) and a screening sheet (7) having mutually opposite end edges, respectively engaging the bar mobile (6) and to the upright (5); at least a first (8) and a second slider (9), each one supported by one of the opposite ends of the mobile bar (6) and which are respectively slidably hooked along the upper guide (2) and the lower guide (3), to guide the movement of the mobile bar (6) away from and towards the upright (5); stabilizer devices (40) to maintain the mobile bar (6) according to an orientation parallel to the upright (5); wherein said stabilizer devices (40) comprise: at least one toothed pinion (41) rotatably hooked to the first slider (8) according to a rotation axis parallel to the longitudinal extension of the mobile bar (6); a rack toothing (42) that operatively engages with the teeth of at least one toothed pinion (41) and that extends along a side wall of the upper guide (2) parallel to the direction of movement of the bar mobile (6), further comprising at least one auxiliary toothed pinion (45), and an auxiliary rack toothing (46) operatively engaging with the teeth of at least one auxiliary toothed pinion (45) and extending along the lower guide (3) parallel to the direction of movement of the moving bar (6), characterized in that said at least one auxiliary toothed pinion (45) is hooked to the second slider (9) in a rotatable manner according to a respective axis of rotation perpendicular to the longitudinal extension of the mobile bar (6), and in that said device sliding screen further comprises anchoring members (28, 29) to fix at least the upright (5) with respect to a vertical side of the window, wherein said anchoring members (28, 29) comprise a lower anchor (29 ) operating between one end of the lower guide (3) and a lower end of the upright (5), in which the lower anchor (29) comprises a toothed insert (29a) that is supported by the lower end of the upright (5 ) and operatively engages with the auxiliary rack toothing (46). Device according to claim 1, in which the stabilizer devices (40) further comprise mechanical transmission members (60) operating between the at least one toothed pinion (41) and the at least one auxiliary toothed pinion (45). ) to synchronize the movements of the first and second slider (8, 9) respectively along the upper and lower guide (2, 3). Device according to claim 2, in which said mechanical transmission members (60) comprise a kinematic chain (61) that is configured to drive the at least one auxiliary toothed pinion (45) according to an equal peripheral speed at the peripheral speed of the at least one toothed pinion (41), and vice versa. Device according to claim 3, in which the kinematic chain (61) comprises a transmission shaft (62) that extends along the mobile bar (6) and that is operatively connected with the pinion (41). ) and the at least one auxiliary toothed pinion (45). Device according to one of the preceding claims, further comprising retention devices (44) that are configured to hold the mobile bar (6) in any fixed position along the upper and lower guides (2, 3) . Device according to claim 4 and 5, in which the retention devices (44) comprise a coupling joint (51) comprising a rotating collar (52) that engages rigidly along the transmission axis ( 62), and a locking collar (53) that rotates through the transmission shaft (62). Device according to claim 6, in which the locking collar (53) is slidably engaged along the drive shaft (62) and is movable between a disengaged position away from the collar swivel (52) and a latching position in which the axial projections (53a) and the clutch seats (52a) which are respectively supported by the swivel collar (52) and the locking collar (53) mutually engage to block the rotation of the drive shaft (62). Device according to one of the preceding claims, in which at least one of said upper guide (2) and lower guide (3) comprises a section bar (2a) having at least one end that engages slidably with respect to a coupling terminal (12), said device (1) comprising push devices (16) that are configured to mutually move away the opposite ends of the upper (2) and/or lower (3) guide . Device according to claim 8, in which the thrust devices (16) comprise a base body (17) that is supported by one of the ends of the section bar (2a), and a thrust insert ( 18) which is slidably hooked to the base body (17) and is movable along a direction of longitudinal development of the section bar (2a), through the action of a rotatably operable control spindle (18a) . Device according to claim 9, in which the control spindle (18a) extends parallel to the longitudinal extension of the section bar (2a) and rigidly supports a drive bevel gear (19) which is operatively engaged with a conical control wheel (20), preferably said conical drive wheel (20) being rotatable about an axis perpendicular to the longitudinal extension of the section bar (2a).