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Title:
DEVICE FOR CLOSING PASSAGE OPENINGS SUCH AS GATE OR THE LIKE
Document Type and Number:
WIPO Patent Application WO/2019/150270
Kind Code:
A1
Abstract:
A device for closing passage openings such as gate, door, window, French window openings or the like, which device comprises a closing element at least partially constituted by a grid and which device is movable from a closed position of the passage opening to an at least partially or totally closed position of said passage opening, or vice versa. According to the invention, the closing element is made so that at least part of its extent, and preferably its entire extent, can be alternately wound around a winding core and unwound from said winding core, the grid element being constituted by a plurality of flexible, longitudinal cables, parallel and placed side-by-side, which are oriented in a direction basically perpendicular to the winding axis, which cables are connected to each other by a plurality of transverse elements oriented parallel to the winding axis and are retained by them at predetermined distances, while said transverse elements are stably coupled to each longitudinal cable at the point of intersection therewith, the completely wound condition of the grid element on the winding core corresponding to the open condition of the passage opening and the completely unwound condition of the grid element from the winding core to the completely closed condition of the passage opening.

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Inventors:
DI GESO, Paolo (Via Braie 299, Camporosso, 18033, IT)
Application Number:
IB2019/050738
Publication Date:
August 08, 2019
Filing Date:
January 30, 2019
Export Citation:
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Assignee:
CENTRO ALLUMINIO EUROPA S.A.S. (in Via Braie 229, Camporosso, 18033, IT)
International Classes:
E06B9/18; E06B9/15
Domestic Patent References:
WO1998024073A11998-06-04
Foreign References:
FR1458426A1966-03-04
Attorney, Agent or Firm:
KARAGHIOSOFF, Giorgio A. (Via F. Baracca 1r, Savona, 17100, IT)
Download PDF:
Claims:
CLAIMS

1. Device for closing passage openings such as gate, door, window, French window openings or the like, which device comprises a closing element at least partially constituted by a grid and which device is movable from a closed position of the passage opening to an at least partially or totally closed position of said passage opening, or vice versa ,

Characterized in that

the closing element is made so that at least part of its extent, and preferably its entire extent, can be alternately wound around a winding core and unwound from said winding core, the grid element being constituted by a plurality of flexible, longitudinal cables, parallel and placed side-by- side, which are oriented in a direction basically perpendicular to the winding axis, which cables are connected to each other by a plurality of transverse elements oriented parallel to the winding axis and are retained by them at predetermined distances, while said transverse elements are stably coupled to each longitudinal cable at the point of intersection therewith, the completely wound condition of the grid element on the winding core corresponding to the open condition of the passage opening and the completely unwound condition of the grid element from the winding core to the completely closed condition of the passage opening.

2. Device according to claim 1, wherein, in the unwound condition of said grid element, the end of the grid element opposite to the winding core comprises locking-in-position means to be locked to stationary anchoring abutments.

3. Device according to claim 1 or 2, characterized in that the grid element is provided in combination with two opposite side guides oriented parallel to the longitudinal cables and in which each side edge, parallel to said longitudinal cables, is slidingly engaged.

4. Device according to claim 3, wherein along each longitudinal side edge, i.e. parallel to the longitudinal cables, the grid element has a plurality of carriages or it carries a plurality of wheels or sliding rollers which are arranged along the length of each longitudinal edge of the grid element and which are respectively slidably engaged in a corresponding guide of said two longitudinal, side guides .

5. Device according to one or more of the preceding claims, characterized in that said carriages or said wheels or rollers are all fastened to a longitudinal cable which forms the side edge of the grid element, and optionally also at least to the nearest point of intersection between a longitudinal cable and a transverse element.

6. Device according to one or more of preceding claims 1 to 4 , in which the carriages, the wheels or the rollers are fastened to the opposite ends of some or all of the transverse elements of the grid element.

7. Device according to one or more of the preceding claims, in which the grid element is provided in combination with locking abutments to lock the passage opening in the closed position, i.e. in the condition unwound from the winding core, which are integral with one or more delimiting sides of the passage opening itself.

8. Device according to one or more of the preceding claims, in which the longitudinal side guides end in a spiral guide coaxial to the winding core .

9. Device according to one or more of preceding claims 1 to 6, wherein the grid element is provided in combination with a supporting frame which comprises a transverse upper element supporting the winding core, at least one pair of side guides, and optionally each guide ends in said spiral guide, and optionally a lower cross member is provided for connecting the ends of the two longitudinal side guides opposite the winding core.

10. Device according to one or more of the preceding claims, wherein the longitudinal cables are metal cables, preferably multifilament cables, whereas the transverse elements are constituted by flexible, multifilament, metal cables or by a rigid rod preferably of metal, or by a pair of said rigid rods , said rigid rods being arranged coincident and parallel to each other and respectively superimposed on one of the two opposite sides of the longitudinal cables .

11. Device according to claim 10, wherein the rigid rod is superimposed on one side of one of the longitudinal cables and on the opposite side of a subsequent longitudinal cable of the set of side-by- side longitudinal cables.

12. Device according to one or more of the preceding claims , wherein two or more cables intertwined with each other and around the transverse elements are provided in place of each longitudinal cable .

13. Device according to one or more of the preceding claims, in which the grid element consists of at least one continuous metal longitudinal cable which simultaneously forms both the transverse and the longitudinal elements of the grid element, the cable portions forming the longitudinal elements being locked to the cable portions forming the transverse elements at the intersecting regions and the initial end of the cable and the terminal end of the cable being connected together so as to close the cable like a loop.

14. Device according to claim 13, wherein at least two mutually intertwined cables are provided in place of a single cable.

15. Device according to one or more of the preceding claims, wherein the means for locking the lower cross member of the grid element, in the condition unwound from the winding core, and for closing the passage opening are constituted by engaging seats provided in the sliding side guides and cooperating with locking pins movable by manual or servocontrolled actuators, alternately to a retracted position of disengagement from said seats and to an outward-pulled position of engagement of said seats .

16. Device according to one or more of the preceding claims, wherein the winding core is driven in the winding and unwinding directions manually or by means of a drive motor for rotationally driving said winding core.

17. Device according to claims 15 or 16, characterized in that it is provided with a control unit which generates signals for powering the drive motor of the winding core and possibly the control actuators of the locking pins, said control unit being provided with a transceiver unit for transmitting and receiving activation signals and in combination with a remote control member which is provided with at least one unit for transmitting actuating signals to actuate the control unit upon the output of the actuating signals to actuate said motor and, if necessary, the actuators moving said locking pins .

18. Device according to one or more of the preceding claims, characterized in that the longitudinal cables and/or the transverse elements are combined with or constitute their tampering sensors, which detect actions of cutting said cables or transverse elements and/or actions of breaking the elements mutually constraining the longitudinal cables to the transverse elements and which sensors are connected to an alarm control unit for signaling said tampering actions .

19. Device according to one or more of the preceding claims, characterized in that at least one further element, such as a mosquito net and/or a sheet of transparent windproof plastic material, or the like, can be superimposed on at least one side or on both sides of the grid element, each of these can be wound and unwound from an independent roller parallel to the winding core of the grid element and driven independently of said winding core of the grid element, said grid element acting as a supporting structure for said mosquito net and/or said transparent windproof sheet.

20. Device according to claim 19, wherein side guides for at least the mosquito net and/or the transparent windproof sheet are provided parallel to the side guides for the grid element.

Description:
"Device for closing passage openings such as gate or the like"

Object of the present invention is a device for closing passage openings such as gate or the like, which device comprises a closing element at least partially constituted by a grid and which device is movable from a closed position of the passage opening to an at least partially or totally closed position of said passage opening, or vice versa.

Such devices are known and widely used in the form of shutters, roller shutters or the like.

However, the known devices have significant drawbacks .

A first drawback of the known devices is the considerable bulkiness in the wound condition that makes it difficult to install them, especially when additional closing elements, such as windows, French windows, doors, shutters or the like restrict the available space.

A further drawback is that these conditions can even become prohibitive for the assembling of traditional devices when they have to be mounted in combination with other pre-existing window fixtures.

Another drawback is that the current closing elements able to be wound are constituted by slats articulated to each other along the transverse sides and parallel to the winding axis and that, in closed condition, completely obscure the view and the passage of light.

A further not so marginal drawback is that the current closing devices are aesthetically unattractive, especially when they have to guarantee a certain mechanical resistance to breaking stresses.

Another drawback of the known devices is given by the cost of material and assembly.

Therefore, the invention aims to produce a closing device that, thanks to a relatively simple construction, allows all the drawbacks of the known devices to be overcome, thereby obtaining a closing device that is not only extremely resistant, but also takes up a little space both in the unwound and the wound conditions, and can be easily manufactured and above all can be easily adapted to different dimensions of the passage openings present in already existing buildings, and can be easily combined with safety and burglarproof or anti -tamper devices and is also aesthetically appealing, while avoiding to obscure the environment that it protects.

The invention achieves the above purposes through a device according to claim 1.

The closing element, made so that at least part of its extent, and preferably its entire extent, can be alternately wound around a winding core and unwound from said winding core, allows a passage opening to be effectively closed against burglaries.

It is possible to keep a limited weight and avoid the darkening of the protected room thanks to the fact that said grid element is made by combining a plurality of flexible, longitudinal cables parallel and placed side-by-side, which are oriented in a direction basically perpendicular to the winding axis and which are connected to each other by a plurality of transverse elements oriented parallel to the winding axis and the transverse elements being stably coupled to each longitudinal cable at the point of intersection therewith.

As will be more clearly shown below, the grid element can be made from one or more multifilament metal cables that can have different diameters, for example between 2mm and 12mm, preferably from 4 to 6 to 8mm.

By locking at the intersecting regions, structural rigidity is provided without preventing the flexibility required for a relatively tight winding and thus ensuring a small size in the wound condition .

Therefore, the grid element can be easily brought into the fully wound condition on the winding core, which corresponds to the open condition of the passage opening, and into the fully unwound condition from the winding core which corresponds to the fully closed condition of the passage opening.

In order to ensure that the passage opening is locked in the closed condition, the end of the grid element opposite the winding core, said grid element being in unwound condition, comprises locking-in- position means to be locked to stationary anchoring abutments .

These means can be of different types and may vary especially when planning the installation in combination with pre-existing windows.

As will appear more clearly from the following description, the locking may take place, for example, by hooks or seats walled or fixed to a delimiting wall, in particular a lower wall of the passage opening, or by an element anchored to said lower wall .

Alternatively, the locking can take place either by means of side bolts or by other means.

The lower side of the grid element can be constituted by a cross member having a preset weight and having the function of maintaining a downwards pulling force on the grid element, thereby facilitating the descent during unwinding and keeping the grid element flat.

The grid element is provided in combination with two opposite side guides oriented parallel to the longitudinal cables and in which each side edge, parallel to said longitudinal cables, is slidingly engaged .

In a preferred but not limiting embodiment, the grid element is provided in combination with two opposite side guides oriented parallel to the longitudinal cables and in which each side edge, parallel to said longitudinal cables, is slidingly engaged .

In order to facilitate the sliding in said guide, according to a further feature that may be provided for each of the embodiment variations, the grid element has a plurality of carriages or it carries a plurality of wheels or sliding rollers which are arranged along the length of each longitudinal edge of the grid element and which are respectively slidably engaged in a corresponding guide of said two longitudinal, side guides.

An embodiment variation provides that the guide is undercut and said carriages, rollers or said wheels are retained from laterally slipping out by rolling walls that partially close the guide towards the grid element thereby forming a longitudinal slot towards the grid element and through which longitudinal slot the grid element is connected to said carriages, said wheels or said rollers by means of side extensions whose thickness is less than the longitudinal slot.

In an embodiment variation, said carriages or said wheels or said rollers are all fastened to a longitudinal cable which forms the side edge of the grid element.

In a further variation, the carriages, the wheels or the rollers are fastened to the opposite ends of some or all of the transverse elements of the grid element.

According to an embodiment variation, in this case, i.e. when the rollers are fastened to the ends of the transverse elements and said transverse elements are constituted by a flexible cable, the roller supports extend towards the opposite side of the grid element to such an extent that they pass through the immediately adjacent fastening element together with the transverse element to which said support is fastened, said support being locked together with the transverse element and to the longitudinal element at their intersection and thus giving, thanks to the rigidity of the support of the roller (s) , greater positional stability of the rollers themselves.

Combinations of said solutions described above can also be provided, so that part of said carriages or rollers or wheels are fastened to a longitudinal cable that forms the side edge of the grid element and, alternatively, part is fastened to the opposite ends of some transverse elements of the grid element.

According to a particularly preferred embodiment variation, which can be provided in any combination with the embodiments and variations described above or below, the longitudinal side guides end in a spiral guide coaxial to the winding core .

In an advantageous embodiment in which the grid element is provided in combination with a supporting frame which comprises a transverse upper element supporting the winding core, at least one pair of side guides, and optionally each guide ends in said spiral guide, and optionally a lower cross member is provided for connecting the ends of the two longitudinal side guides opposite the winding core.

In this case, in place of providing the device in the form of a kit of parts to be assembled on site and, if necessary, to be adapted to the current conditions, the closing device can be provided already mounted on a frame that must only be properly fixed to the walls delimiting the passage opening.

Although the two solutions described above are alternatives to each other, they are both possible and can be chosen according to client's wishes or current conditions.

It should be noted that even the grid element can be resized at the implementation site as few tools are required for its construction.

As previously stated, the longitudinal cables are metal cables, preferably multifilament cables, whereas the transverse elements are constituted by flexible, multifilament, metal cables or by a rigid rod preferably of metal, or by a pair of said rigid rods , said rigid rods being arranged coincident and parallel to each other and respectively superimposed on one of the two opposite sides of the longitudinal cables .

Different metals can be used, such as steel, iron, stainless steel, galvanized steel or other alloys having sufficient mechanical and shear strength.

The transverse elements and the longitudinal cables can intersect with each other in various ways.

A simpler embodiment provides that the transverse elements are arranged so as to be superimposed only on one face of the longitudinal cables .

According to an embodiment variation, transverse elements are provided on both sides of the set of longitudinal cables adjacent to each other.

Similarly, according to an embodiment variation, each longitudinal cable can be doubled and each transverse element can be positioned between the pairs of longitudinal cables.

A further embodiment variation provides that longitudinal cables and transverse elements are positioned according to four different layers, the first layer consisting of longitudinal cables covered by a first layer of transverse elements, a second layer of longitudinal cables is superimposed on said layer of transverse elements and a second layer of transverse elements is superimposed on said second layer of longitudinal elements, the various cables being locked together at the intersections .

This layered arrangement can be repeated for more than the four layers described as it is possible to provide a different number of layers constituted by longitudinal cables and layers constituted by transverse elements .

According to a further possible variation, the cables and/or the transverse elements and the different layers can either coincide with each other or be staggered with each other.

Still according to a possible embodiment, the longitudinal cables can be intertwined with the transverse elements of the adjacent layer, being superimposed on one side of a transverse element and the diametrically opposite side of the adjacent transverse element.

Similarly, the transverse elements can also be intertwined with the longitudinal cables of the adjacent layer by being superimposed on one side of a longitudinal cable and the diametrically opposite side of the adjacent longitudinal cable.

When several layers of longitudinal cables and transverse elements are provided, these cables and/or transverse elements of the different layers may intertwine with each other according to different combinations of intertwining patterns .

When, in place of single longitudinal cables, one or more of these is replaced by two or more longitudinal cables, whose diameter is preferably smaller than the single cable, the two or more longitudinal cables that replace each single cable may intertwine with each other, e.g. helically or according to other patterns of mutual intertwining.

Both the embodiment where only one layer of longitudinal cables and one layer of transverse elements are provided and the embodiment variations where more than said two layers are provided, may comprise this feature in combination with one or more of the variation of intertwining of the longitudinal cables with the transverse elements.

In an embodiment variation, each transverse element is constituted by at least one metal cable.

In an embodiment variation, each transverse element is constituted by at least one metal rod.

Also in this case it is possible to provide two or more layers as described above and it is also possible to provide that the longitudinal cables are intertwined with the rods.

The two embodiment variations can also be combined by providing that some transverse elements consist of at least one metal cable and some transverse elements consist of at least one metal rod.

Still according to an embodiment, the grid element consists of at least one continuous metal longitudinal cable which simultaneously forms both the transverse and the longitudinal elements of the grid element, the cable portions forming the longitudinal elements being locked to the cable portions forming the transverse elements at the intersecting regions and the initial end of the cable and the terminal end of the cable being connected together so as to close the cable like a loop.

The winding and unwinding of the grid element and possibly also the locking action, in the closed condition of the passage opening, and/or the unlocking action, all can be carried out manually or by means of motorized actuators which are activated manually or by remote control .

According to an embodiment variation, automatic tampering detection sensors can be combined with the grid element.

Various solutions available at the state of the art are possible. An embodiment variation may provide that the same longitudinal cables and transverse elements form meshes in an electric circuit that are sensitive to variations in an electrical signal when a cable or element is cut or when a cable or transverse element is moved by deforming the grid to generate wider openings that allow passage. A further embodiment provides that sectioning and/or deformation detection sensors which may be, for example, optical fibers or the like, are combined with the cables and/or transverse elements, preferably inside the latter.

Both the sensors of the two above said variations are connected to an alarm control unit to signal said tampering actions .

It is also possible to consider a combination of the two solutions or other similar solutions.

Still according to an advantageous feature, the grid element can be a reinforcing and supporting element for a mosquito netting curtain and/or a transparent windproof sheet or the like.

In an embodiment, at least one or each of said curtain and said sheet can be provided with an independent winding/unwinding roller that is parallel to the winding core of the grid element and that can be operated independently of the said winding core of the grid element.

In order to give greater resistance to the mosquito netting curtain or the transparent windproof sheet and to guarantee better closure, an embodiment further provides that side guides for at least the mosquito net and/or the transparent windproof sheet are provided parallel to the side guides for the grid element .

The locking constraint of the cables to the transverse elements is obtained through a mechanical clamping constraint by means of clasps pressed against the cable and the transverse element or by welding or gluing or intertwining or else by combinations of these alternatives.

However, the invention is not limited to the embodiments described above. Thanks to these, in fact, it is possible to have a grid with rectangular or square openings having various sizes, both widthwise and lengthwise.

By providing longitudinal cables and transverse elements also consisting of cables, which longitudinal cables and transverse elements are tilted with respect to the direction perpendicular to the winding axis, grid elements with rhomboidal or diamond openings can be generated, without compromising the flexibility required for winding and unwinding the grid element.

This flexibility can also be advantageously modified by acting on the diameter of the cable and choosing, instead of only one cable, two cables that replace it and have smaller diameters and maybe are even wound on each other .

The invention has additional features that are the object of the dependent claims.

These and other advantages of the present invention will be more apparent from the following description of some exemplary embodiments depicted in the accompanying drawings, wherein:

Figure 1 shows a first embodiment of the closing device according to the invention.

Figure 2 shows a cross-sectional view according to a plane perpendicular to the plane defined by the grid element of figure 1 and parallel to the winding axis of the grid element on the winding core.

Figure 3 shows an embodiment variation of the device, as in Figure 1.

Figure 4 shows again a further embodiment variation of the device.

Figure 5 shows an enlarged detail of a grid element according to a further exemplary embodiment.

Figure 6 shows an enlarged detail of the sliding rollers and the respective guide according to the variation of figure .

Figures 7 and 8 show an enlarged detail of several fastening means to mutually fasten a cable and a transverse element at the intersection region, respectively.

Figure 9 shows an enlarged detail of a side guide having a sliding carriage engaged therewith, according to the examples of figures 1 to 3.

Figure 10 shows a plan view of a spiral-shaped end of the side guide.

Figure 11 shows a perspective view of the spiral end of figure 10.

Figures 12 to 18 show an embodiment of the locking system in the closing condition of the device according to the present invention.

In the present description and in the claims, the term longitudinal refers, for simplicity, to a direction basically perpendicular to the axis of rotation of the winding core of the grid element or to a direction comprising at least one directional component perpendicular to said axis of rotation.

Similarly, the term transverse refers to a direction basically parallel to the axis of rotation of the winding core of the grid element or to a direction comprising at least one directional component parallel to said axis when the transverse element is flexible and can be wound, whereas the term transverse refers to a direction parallel to the axis of the winding core when the transverse element is a rigid rod.

Therefore, although for simplicity the embodiment illustrated and described is directed to a grid element that is wound around a winding core with horizontal axis, this winding core can also be positioned vertically or tilted with respect to the horizontal direction.

Correspondingly, the term "side" denotes an edge parallel to the longitudinal direction.

It is therefore clear that the scope of this invention comprises an embodiment in which the winding and unwinding take place around a vertical axis, and the grid element slides along a horizontal direction and not vertically and therefore, in this variation, the sliding takes place laterally, i.e. from right to left or vice versa.

In the present invention, the term cable refers to a flexible element able to be wound that can be multifilament or monofilament or also comprises a plurality of parallel and grouped cables or a plurality of mutually intertwined cables.

The term rod defines and denotes either a single longitudinal rigid element, or a combination of longitudinal rigid elements coupled together rigidly or in articulated manner.

Referring to figure 1, an exemplary embodiment of the device according to the present invention comprises a grid element 1 consisting of a series of side-by-side longitudinal cables 101, i.e. in this case oriented vertically and perpendicularly to the axis of rotation of an upper winding roller or core 2.

A series of transverse elements 201 connect the longitudinal cables 101 together. The longitudinal cables 101 and the transverse elements are arranged at predetermined distances from each other. Distances may be chosen so as to form square or rectangular meshes. The meshes are sized so as to prevent the passage of a person. The mesh size can be constant over the entire extent of the grid element or it can vary either in accordance with the distance between longitudinal cables 101 or in accordance with the distance between transverse elements 201.

The longitudinal cables 101 and the transverse elements 201 are joined together fixedly at the intersection points, thanks to fastening means 301 that can be of mechanical type, such as clamping means that clamp by compression or mechanical seaming means, or else the connection can also take place by means of physico-chemical adhesion such as welding and/or gluing.

In the example of figure 1, the mutually connecting means 301 for the connection of the longitudinal cables 101 and the transverse elements 201 consist of two shell-like elements 301 that are shaped so as to form diametrically opposed passages for a longitudinal cable 101 and for a transverse element 201 and that comprise cooperating seats and extensions whose reciprocal coupling takes place by compressing them against each other.

The top end side of the grid element is connected by hooks or fastening means 102 to a fixed winding core 2 rotatable around a horizontal axis thanks to supporting brackets 10 or to a continuous transverse top element not shown in detail .

The winding core 2 can be housed in a storage compartment of the grid element, the compartment being obtained either in the thickness of a wall in which there is the passage opening intended to be closed by the device or in a box (not shown) housing the winding core 2 and the grid element when the latter is wound on the former.

Said core 2 can be rotationally driven in both winding and unwinding directions by means of a motor 70 preferably, but not only, of the type that can be housed inside the core 2, either in an end compartment or taking advantage of the fact that the core is made tubular. A manual control panel and/or a remote control or a remote control unit via cellular or telephone line or another wireless or wired communication network, allow the motor drive to be controlled. The construction of this type of systems is known in the art and is not illustrated in the figures, since a large number of different embodiments are possible and available at the state of the art.

In this case, the box is fixed to the upper side delimiting the passage opening provided in the wall .

A sliding guide 4 along each side of the side walls of the passage opening, which are oriented parallel to the longitudinal cables 101 or in the longitudinal direction, i.e. perpendicular to the axis of the winding core 2, the sliding guide having an inner sliding compartment for terminal elements such as slides, carriages or rollers or wheels that are arranged along the side edges of the grid element and oriented parallel to the longitudinal cables 101 or to the longitudinal direction as defined above, are provided.

The guide has a longitudinal slot 104 open on the side facing the inside of the opening, i.e. towards the corresponding side edge of grid element 1, the longitudinal slot being narrower than the corresponding size of the guide's inner compartment.

In the example of figures 1, 2 and 9, the side edge of the grid element carries a series of carriages 5 each comprising one or two coaxial pairs of wheels 105 and fixed at predetermined distances, preferably identical to each other, along the edges of the grid element 1, by means of terminal fastening elements denoted by 401 in figure 1, by 600 and 601 in the following figures. The thickness of said terminal elements 401 is less than the width of the slot 104 through which they are connected to the carriages 5 that, this way, remain engaged in the guide so that they can only be removed by disassembling each guide and withdrawing the carriages therefrom through the end opening.

In the example in figure 1, the grid element 1 and the longitudinal cables 101 and the transverse elements 201 are constituted by a single flexible cable arranged so as to form bents or arched lengths oriented in two different directions perpendicular to each other .

The two ends of the cable are connected to each other so as to close the cable like a loop, while the fastening to the winding core 2 to the carriages 5 and to a lower bar 6 takes place at said bends .

The lower bar 6 is either a terminal element for fastening the lower side of the grid element to a lower abutment of the passage opening, which may be an element permanently fixed to the lower delimiting wall of said opening, or a lower cross member connecting the two side guides 4 at their upper ends.

According to an embodiment, not illustrated, the winding core 2 can be fixed to an upper beam not illustrated and that connects, like the lower cross member, the upper ends of the two side guides while forming one of the walls of a storage box of the grid element 1 when the latter is wound on the winding core 2.

In addition, the side guides 4 and the upper and possibly the lower cross members can form a frame to which the grid element 1, the winding core 2 and all other mechanisms known per se for moving the roller are assembled for locking the grid element in the unwound condition.

It is evident that the device according to the present invention can be made either in the form of a finished product and able to be fastened to the delimiting walls of a passage opening, the frame and the grid element 1 as well as the other constructive parts of the device being previously sized to fit the measure of the passage opening and assembled to each other, or in the form of a kit of parts that can be joined together or simply separately fixed to the delimiting walls of the passage opening, when the installation is carried out.

Thanks to the constructional simplicity, standard parts may undergo dimensional adjustments to fit the opening, and in order to obtain fine dimensional adjustments, these can be easily made on site .

The longitudinal cables 101 and the transverse elements 201 are preferably made of metal and may consist of either a single multifilament cable or two or more multifilament cables coupled, e.g. helically wound, together.

Cables similar to those called push-pull and equipped with a flexible outer coating that encases a single or multifilament core are also possible, as well as any other metal cable having the required elastic deformability to allow repeated winding and unwinding .

The cables can also be colored with different colors within the same grid or each grid can have a single color chosen from a color palette so as to match the color of the windows and fagades of the buildings . In the embodiment of figure 1, the lower bar 6 is also a lower ballast element that facilitates the unwinding and therefore the sliding of the grid element 1 along the guides in the direction of closing the passage opening and that cooperates with fastening ears 7 embedded in the lower threshold and to which is stably coupled by means of removable transverse pegs 701, e.g. lock pins or the like that are not illustrated in detail being known per se and widely used for example for closing shutters.

As already described in the introductory part and also by the description of the following embodiments , a considerable number of embodiment variations of the example according to figure 1 are possible.

Figure 2 shows two different alternative embodiments for fastening the carriages 5 to the terminal elements of the transverse elements 201. In a first embodiment, the end length of the transverse element 201 is inserted and tightened in an inner compartment of a tubular wand 600 similarly to a splice or the like. This tubular wand 600 ends before reaching the first element 301 mutually connecting the transverse elements 201 to the vertical elements 101. By contrast, the embodiment variation denoted by

601 and with the extension part of the tubular wand 600 shown by a dashed line, provides that said tubular shaft extends to a greater extent than the 600 and goes beyond the first mutual -fastening element together with the length of the transverse element 201 inserted therein, so that the mutual - fastening element 301 locks not only the transverse element 201 and the vertical element 101 to each other but also the tubular wand 601 supporting the carriage 5.

Thanks to this construction, especially when reproducing the embodiment that uses flexible cables as transverse elements 201, a greater positioning stability is given to the carriages that are less prone to move thanks to the flexibility of the transverse element to which they are fastened, as is conversely possible in the case of the variant that uses the shorter wand 600.

The second embodiment variation of the figure is also provided in the exemplary embodiment of figure 3, but can also be provided in the embodiment of figure 4 as shown in detail in figure 6. Figure 3 shows a first embodiment variation in which the difference from the first one consists of a different mutually connecting element to connect the longitudinal cables 101 and the transverse elements 201. These elements 301 are illustrated in detail in figure 8 and consist of a clasp that is clamped against the longitudinal cable 101 and the transverse element 201 at the intersecting region, while the two shells of the clasp are constrained to each other by end flaps folded onto the outer delimiting edges of the combined shell .

A further difference between the embodiment of figure 3 and the embodiment of figure 1 is that the transverse elements 201 and the longitudinal cables 101 are made from separate elements cut to size and fixed together at the intersecting regions to form the grid element 1. Therefore, the side edges and the upper and lower edges of the grid element provide the end lengths of the individual longitudinal cables 101 and the individual transverse elements 201. The end lengths of the longitudinal cables 101 are combined with terminal fastening elements 201 fastened to the winding core 2 and to the lower cross member 6, respectively. The end lengths of the transverse elements 201 extend thanks to tubular fittings tightened thereon with the side carriages 5 slidingly engaged in the guides 4 and passing into the guide through the longitudinal slot 104, the latter being made wider than said fittings that couple the carriages to the end lengths of the transverse elements 201.

Figure 4 shows a further embodiment in which the longitudinal cables 101 and the transverse elements 201 are connected to each other by fastening elements 301 that are provided at each intersection and are made as shown in figure 7 and comprise a metal wire that wraps and tighten the lengths of the longitudinal cable 101 and those of the transverse element 201 adjacent to the point of intersection, thereby forming at least one bend 310 for binding the longitudinal cable 101 and the transverse element 201 in the region of mutual intersection.

The embodiment of figure 4 has a grid element 1 made in the same way as the one in figure 3, except for the different types of fastening means that mutually fasten the longitudinal cables 101 to the transverse elements 201.

A first variation is that in place of the carriages 5, each end length of the transverse elements 201 carries a roller 50 that is mounted so as to rotate around an axis essentially parallel to the axis of the transverse element 201. In particular, the illustrated embodiment shows an embodiment variation in which the axis of the rollers 50 is coaxial with the axis of the transverse elements 201.

A further difference with respect to the previous embodiments provides that the side guides extend in the region of the winding core 2 with a terminal element consisting of a spiral-like guide denoted by 404. A plan view of a detail relating to this spiral-like end length 404 of the guide for the grid element 1 is shown in the enlarged detail of figure 10.

At each side guide 4 and axially aligned therewith, in this case vertically or longitudinally aligned therewith (considering the previous definition of the term longitudinal) , a terminal guiding element having spiral pattern 404 is provided and flanks the corresponding head side of the winding core that is mounted on a spindle 8 coaxial with the spiral shape of the terminal element 404 of the guide .

During the winding and unwinding operations , therefore, the grid element is guided and retained in the optimal winding and unwinding condition by the two opposite spiral guides 404 that allow the grid element to remain taut without forming waviness or deformations that can cause hooking or can increase the winding and unwinding resistances.

Another difference in the embodiment according to figure 4 with respect to the previous embodiments is that the lower cross member 6, which consists of a hollow element and has engaging seats at the two opposite ends for two bolts 9 each positioned in a vertical guide, at the lower end thereof, and these bolts 9 have an engaging peg 901 to be engaged in said seat of the facing end of the lower cross member 6.

In the illustrated embodiment, each pin is controlled by a separate mechanism 902 that allows it to be alternatively:

moved outwards, to the seat engaging position thus generating the locking condition of the lower cross member 6 and therefore of the grid element in the closed condition of the passage opening as illustrated, and

moved backwards in the disengaging condition of the peg 901 from the seat, thus releasing the cross member 6 and therefore the grid element that can thus slide upward during its winding on the winding core

2.

The actuation can be either manual, for example by making the drive mechanisms 902 controlled by a key, or the actuation can take place via a motorized mechanism 902, for example thanks to an electric and/or electromagnetic and/or pneumatic and/or hydraulic motor.

An alternative not shown can provide a common drive mechanism acting on the two pegs 901 and causing their engagement and disengagement strokes so as to be engaged/disengaged with/from the seats thanks to a single actuator or a single key control , as already provided and known in combination with known closing devices available on the market.

With regard to the different variations shown in combination with the example in figure 4, it should be noted that these may be provided separately or all together or only partially even in combination with one or more of the variations described above, obviously considering the obvious changes that allow these variations to be applied in the previous embodiments .

According to another feature, with regard to the examples of figures 3 and 4, the transverse elements 201 can consist each of either a metal cable like the longitudinal cables, or at least one rigid transverse rod preferably also made of metal material .

It is also possible to provide that at least part of the transverse elements 201 consists of at least one rod and at least part of at least one metal cable, which can be distributed over the extension of the grid element 1 according to different orders and patterns .

According to an embodiment variation, each transverse element 201 and/or each longitudinal cable 101 can be formed of several transverse elements or cables grouped together in a transverse element and a longitudinal element, being connected together, for example, by means of mutual intertwining, winding and/or crimping or other mechanical or physico chemical fastening means.

In the embodiments described above, the longitudinal cables 101 and the transverse elements 201 are arranged on two planes placed side by side and come into contact with each other always on the same side. It is possible to provide that at least some and possibly all the transverse elements are superimposed on the first side of a longitudinal element on a diametrically opposite side of a second longitudinal element, this order can be kept identical for each transverse element or it can be modified for adjacent transverse elements by reversing the superimposing sides with respect to the adjacent transverse element.

The same can be provided alternatively or in combination for at least some, preferably for all the longitudinal elements 101.

The variation of the superimposing side can occur for each adjacent longitudinal and transverse elements, respectively, or for a greater number of transverse or longitudinal elements, respectively.

According to still another embodiment variation that can be provided for each of the variations described above, the grid element can be formed by several layers of cables or longitudinal elements and transverse elements .

A variant could consist of two grid elements made according to one or more of the previous embodiments and that provide a single layer of cables or longitudinal elements and a single layer of transverse elements for each grid element, the grid elements being superimposed on each other.

Another embodiment variation provides that if more than one layer are provided, the meshes formed by each layer have different shapes and some intersections pertaining to one layer fall within the mesh of another layer.

According to another variation the grid element is formed by an even number of layers of cables or longitudinal elements and an odd number of layers of transverse elements or vice versa.

On the other hand, a variation provides an identical number of alternating layers of longitudinal elements or longitudinal cables and transverse elements .

Figure 5 shows a further variation of the grid element in which instead of a plurality of longitudinal elements consisting of a single cable, each longitudinal element 101 consists of a plurality of longitudinal cables and in particular three cables parallel to each other and preferably multifilament.

In the example of figure 5, the transverse elements consist of a number of metal rods 201 that are held in position parallel and spaced with respect to each other by the longitudinal elements 101, each formed of three parallel cables. Said cables are connected to the transverse elements 201 and lock the latter in position by being intertwined in such a way that the two side cables are superimposed on a first side of a transverse element and on a second side diametrically opposite said first side of an adjacent transverse element 201, while the central cable is always superimposed on the side of the transverse element diametrically opposite that of the two side cables .

The distances between transverse elements 201 can be varied by changing the diameter of both the transverse elements 201 and the cables forming the longitudinal elements 101.

The grid element according to this embodiment variation has the advantage of having very small and dense meshes and maintaining very high strength, limited weight and very high deformability in relation to the winding and unwinding, as well as considerable shape stability especially with regard to the pattern in the plane parallel to the transverse rods 201.

A drive mechanism for rotationally driving the winding core 2, which can be manual or motorized, can be provided in combination with each of the illustrated embodiments. These types of mechanisms are known and widely used also in the field of doors and window frames.

The motorized mechanism may have push-button controls or alternatively or in combination remote controls .

These actuation modes may also be present in combination thus allowing the winding core 2 to be driven both by manual actuation and through control panel as well as through remote control .

Similarly, a manual and/or motorized mechanism with push-button and/or remote control of the locking means to lock the lower cross member 6 in the device's closed position can be provided. Again, these solutions are widely known and used in the art.

According to a further variation of the device according to the present invention, which can be provided in combination with any one of the previous variations, the grid element itself can be a burglary or tampering detection sensor for the device. In this case, the grid element is a mesh of conductive material that varies its characteristics of conductivity, capacitance and/or inductance in relation to an electrical signal injected thereon. A detector measures the signal and detects the variations thereof, for example if one or more longitudinal or transverse elements 101 and 201 are cut, or in case of loosening of some fastening regions and deformation of the corresponding longitudinal and transverse elements 101, 201. The signal changes processed by a signal analyzer of an alarm control unit are then used to cause the actuation of one or more alarm signals of acoustic or visual type and/or for sending messages to monitoring stations .

An embodiment variation, which can be provided alternatively to the previous one or in combination therewith in order to increase the security level, consists of using the grid element as a support for sensors detecting burglary and/or tampering activities .

A non-limiting example is constituted by optical fibers that are fixed to the transverse and/or longitudinal elements or that are intertwined or contained in the same elements and that detect deformations and/or cuts of said elements thanks to the variation of a light signal injected from a source into said fiber and read by a detector. The variations of the light signal are then analyzed in the same way as the electrical signals of the previous example and, if considered as resulting from a tampering or cutting action, the alarm signals are actuated.

As evident, when not only the grid element is used as a sensor but also an additional sensor is provided, the security is increased.

The grid element and/or also the side guides can be used to combine with the device mosquito nets or windproof sheets of transparent plastic material, or curtain-like elements.

These mosquito nets and/or windproof sheets of plastic material and/or curtain sheets may simply be attached to the grid element 1 that forms the support thereof, or they may also be wound each on its own winding roller that is separate from the roller for the grid element and allows the grid element to be combined with one of said mosquito nets, said curtains or said transparent windproof sheets or, at the same time, with two or more of them either in a position in which they are superimposed on each other or on two opposite sides of the grid element.

If necessary, side guides parallel to the side guides for the grid element may also be provided for these nets, curtains or sheets, and are fixed adjacent to said grid-element side guides or the latter are provided with several adjacent parallel guide channels.

From the foregoing the great advantages of the closing device according to the present invention, which have been described in the introductory part, are clearly evident.

Referring to figures 12 to 18, these figures show an embodiment variation of the removable locking system in the closed condition of the device according to the present invention.

At the lower end of the grid element there is a cross member 6, which is made with a C-shaped cross- section oriented with the open side downwards. The cross member 6 carries the pins 106 with enlarged head 206 at predetermined distances along the longitudinal axis of the cross member, the pins protruding downwards and being intended to engage corresponding holes 207 of a lower cross member 7 of the device frame .

The lower cross member 7 of the frame is tubular and has a hole 207 for each pin 106. The diameter of the holes 207 is slightly larger than the enlarged head 206 of the corresponding pin 106.

Inside the lower cross member 7 of the frame there is a slider 20 for each hole having, in a position axially coincident with the corresponding hole 207, an elongated hole 18 consisting of a part 118 circular and concentric with the hole 207 and having a diameter substantially identical to the hole 207, the circular part extending as an eyelet 218 whose width is smaller than the diameter of the enlarged head 206 of the pin 106 but greater than the diameter of the stem of the pin 106.

Advantageously, in an embodiment, the holes 18 combined with the corresponding holes 207 are provided on a single common slider having the shape of a flat bar that slides axially inside the lower cross member 7 and is tubular and parallel to the upper side of the said cross member.

Figures 12 to 18 show different views in the locked condition, in which the common slider 20 is moved to have the circular part 118 of the elongated hole coincident with the hole 207 in the cross member therefore allowing the axial passage of the pin 106, and in the locked position in which the slider 20 is translated to a position with respect to the cross member such that the elongated part 218 of the hole 18 is coincident with the hole 207 and engages the enlarged head thereby retaining it against the lower cross member 7.

The movement of the slider 20 can take place thanks to different actuators, both manual and motorized, and in particular thanks to the same actuators controlling the winding and unwinding of the grid part of the device.

Figures 12 and 13 show a further improvement that may or be provided or not. The width dimension of the frame in a direction perpendicular to the grid element in the closed position is greater than the corresponding dimension of the vertical side guides 4. These are mounted flush with the plane subtended by the frame and tangent on one side thereof, whereas for the remaining thickness of the frame, the side guides 4 are combined with tubular reinforcement posts 21 that are superimposed and adherent against them.

This solution reinforces the guides and prevents them from being widened by means of burglary instruments such as tackles or the like.

Still according to a further feature, the grid element and/or other parts of the device can be colored and anodized.