Patent Description:
There are different covering systems using sheets or tarpaulins. Such systems include, for example, "single-piece" sheets of adequate size to the area to be covered, supported by supporting structures, such as for example reticular structures. In the case of very large areas to be covered, the "single-piece" tarpaulin, or rather a non-interrupted tarpaulin, is also necessarily large (mostly made up of smaller sheets welded together). It is evident that a tarpaulin of such dimensions foresees high production costs, considering also the fact that it is often created "ad hoc" for a specific use and can not therefore enjoy the advantages of economies of scale.

Other examples of coverage, provide for the use of tarpaulins of smaller dimensions, placed side by side on each other. However, these covers have the disadvantage of not allowing adequate protection from the weather, since any protection elements of the contact areas between adjacent sheets are mostly improvised. <CIT> illustrates a covering system of the prior art.

<CIT> discloses another known covering system.

The object of the present invention is to solve the drawbacks claimed in cover systems of a known type.

Another important purpose of the present invention is to provide a sheet coating system which is flexible in use and which therefore allows to adequately cover both small and large areas.

Another important purpose of the present invention is to provide a covering system by sheets, which is quick and easy to install.

Another object of the present invention is to provide a covering system by sheets, which allows to obtain an optimum protection from the weather.

Last but not least important purpose of the present invention is to provide a covering system using sheets, which is versatile and can be adapted to the temporary or final covering of roofs having two or more slopes with different inclination angles.

These and other purposes, which will be clearer later, are achieved with a modular covering system, according to claim <NUM>, i. to associate with one or more loadbearing structures comprising.

In the system of the invention, each sheet comprises a second side, contiguous to said first side, along which, parallel thereto, there is joined, by means of a joining strip thereof, a second said band, said second band being arranged on the upper face of said sheet and protruding with respect to the edge of said second side to be able to overlap a sheet arranged adjacent to said second side; said second band comprising reversible connection means to said adjacent sheet, said reversible connection means comprising an upper connection strip provided on said second band and a lower strip produced on said adjacent sheet, adapted for connection with said upper strip.

Preferably, said first and said second band form a single band, preferably with a shape similar to an "L".

Preferably, said joining strip, preferably made by gluing or welding, is produced on said sheet in a position opposite the edge of the respective side with respect to the series of eyelets produced along said respective side.

Preferably, said upper connection strip provided on said band and said lower strip produced on said adjacent sheet, adapted for connection with said upper strip, comprise male-female elements of hook and loop type, preferably of waterproof type.

Preferably, said lower strip produced on said adjacent sheet, adapted for connection with said upper strip, comprises holes with eyelets, while said upper connection strip provided on said band is provided with pins facing downwards, adapted to be inserted into respective said holes with eyelets, said pins being provided with a portion to prevent removal from said holes with eyelets, movable reversibly to a configuration that allows removal and to a configuration that prevents removal.

Preferably, said sheet is adapted to be arranged sloping and said first side is at a lower height with respect to the opposite side of the sheet, so that said band that is joined, with waterproof seal, to said sheet and that extends along said first side, overlaps the edge area of the upper side of the adjacent sheet, so that any water running on said sheet runs over said band without penetrating between band and sheet and therefore continues to run on said adjacent sheet.

Preferably, the modular covering system comprises a said sheet adapted to occupy the position close to the ridge of the covering, said ridge sheet being sloping and having an upper side adjacent to an elongated element of the supporting structure that defines the ridge of the covering system; said sheet comprising three of said bands, a first lower band, that extends along the lower side of the sheet, for covering the space between the sheet and the edge of the lower adjacent sheet, a second lateral band that extends along a lateral side of the sheet, for covering the space between the sheet and the edge of a laterally adjacent sheet, and a third upper band that extends along the upper side of the sheet, for covering the space between the sheet and the edge of the adjacent sheet on the other part of the ridge of the covering system.

Preferably, said sheet is adapted to be arranged sloping and said first side is the lower side of the sheet, or the side that is at a lower height with respect to the others.

Preferably, said connection means, at least partially reversible, of said bands with the respective sheets comprise, for each band, at least a connection strip that comprises pins facing downwards, adapted to be inserted into respective holes with eyelets produced on portions or parts of said band integral with said sheet, or on said sheet; said pins being provided with a portion to prevent removal from said holes with eyelets, movable reversibly to a configuration that allows removal and to a configuration that prevents removal.

In an embodiments not according to the invention, at least a first of said bands is joined at least partially irreversibly along a side of a respective sheet, said first band being divided into three parts:.

In another embodiment not according to the invention, at least a second of said bands is joined at least partially irreversibly along a side said respective sheet, said second band being divided into three portions.

According to another aspect, the invention also concerns a covering assembly according to claim <NUM>.

Further characteristics and advantages of the invention will become clearer from the description of a preferred but not exclusive embodiment thereof, illustrated by way of non-limiting example in the accompanying drawings, wherein.

The covering system <NUM> is associated with supporting structures formed for example by scaffolding equipped with support posts on the ground <NUM> (which can also be cantilevered by means of reticular structures) on which frames <NUM>, preferably quadrangular, and more preferably rectangular, are fixed. Frames <NUM> are made of elongated elements, such as 12T cross members and <NUM> side members.

For example, these frames are inclined to provide a sloping cover which therefore has a longitudinal portion of ridge <NUM>. Covering sheets <NUM>, preferably rectangular, are arranged inside the areas defined by the frames <NUM>, and fixed to the same frames, as explained below. In practice, the frames <NUM> define support areas for the sheets <NUM>.

For example, the covering sheets <NUM> are arranged to cover an extended surface, for example an house roof in reconstruction, and are therefore impervious and arranged adjacent one to the other, above the roof, according to a matrix configuration. <FIG> shows an example of a covering system configuration in which there are nine adjacent sheets, arranged according to a 3x3 matrix, inclined by the longitudinal portion of ridge <NUM> downwards. The direction of downward inclination or rather the slope is indicated by arrow Z.

It should be noted that the ground uprights <NUM> are not always necessary, in the sense that it is not strictly necessary that one or more uprights <NUM> are associated with a frame <NUM>. In fact, in most cases, the frames <NUM> are connected together to form a matrix, while the supports on the ground can be present, for example only in the sides relative to the ends of the matrix (for example, in the case of one single building to be covered, the uprights can be four, placed at the corners of the matrix, and however there are nine or more frames, so it is evident that many of these will be free of uprights but will be supported by adjacent frames).

Name with a, b, c the rows and columns of the matrix, with "a" at the top and left side of the matrix and "c" the lower and right part, the sheets are also indicated with an apex: <NUM>aa indicates the first sheet close to the ridge <NUM>, <NUM>ac indicates the last sheet close to the ridge, <NUM>ab indicates a second sheet close to the ridge <NUM>, included between <NUM>aa and <NUM>ac. Likewise, <NUM>ba indicates the sheet lowerly adjacent the sheet <NUM>ac, <NUM>bb indicates the sheet lowerly adjacent to the sheet <NUM>ab and so on, also for row c.

The sheets <NUM> preferably include, along their perimeter, close to the edge area, a plurality of eyelets <NUM> to allow fixing to the frames <NUM> by means of cables <NUM>, hooks or the like, according to the prior art.

In practice, in this example, each side of a sheet is connected to the elongated member of the nearest frame <NUM>. Each side of a sheet <NUM> is indicated with the number of the corresponding sheet (with relative quotes) followed by one of the letters i (lower), h (upper), d (right), s (left) which respectively indicate the position with reference to the orientation on the figures. Therefore <NUM>abi indicates the lower side of the sheet <NUM>ab, <NUM>cbd indicates the right side of the sheet <NUM>cb etc..

Moreover, two sides of two sheets <NUM> adjacent to each other are fixed, on opposite sides, to an elongated element 12T or <NUM>. In this configuration, the elongate element 12T or <NUM> is placed in the boundary zone between adjacent sheets and the edges of these are spaced from one another. For example, between the <NUM>bad side of the sheet <NUM>ba and the <NUM>bbh side of the adjacent sheet <NUM>bb there is space occupied by a crosspiece 14T, to which the two sheets are connected by cables <NUM>, passing through the eyelets <NUM> associated with said sides.

In other embodiments, the sheets may have dimensions that are integer multiples of the corresponding frame sizes, thus reducing the number of required eyelets and the assembly and disassembly time of the system.

The covering system comprises bands <NUM>, which are also suitably waterproof, for covering the border areas between adjacent sheets. In particular, these bands <NUM> are superimposed onto the edge areas of the sheets, or rather they overlap these edge areas, in correspondence with the boundary areas which they must cover.

More in particular, the bands <NUM> also overlap the eyelets <NUM> present in the edge areas of both adjacent sheets that the bands connect.

According to a first embodiment of the invention, there are two bands <NUM> for each sheet <NUM>, arranged on adjoining orthogonal sides, each one welded on the upper face of a relative sheet <NUM>, parallel to a respective side thereof. In the following, the numbering of the bands follows the same logic of the numbering of the sides of the sheets.

For example, taking reference to the sheet <NUM>ba (see <FIG> and <FIG>), there is a first band <NUM>bai welded (or glued or other technology which allows liquid tight seal, or a "waterproof" seal) along a joining strip <NUM>, to the upper face of the sheet, parallel to its lower side <NUM>bai (defined hereinafter also as "first side"). Said band <NUM>bai has a width (or rather the dimension according to the direction z) such that it protrudes from to the edge of the lower side <NUM>bai and overlap the edge area of the sheet adjacent below14ca.

It should be noted that the joining strip <NUM> is made on the sheet <NUM>ba in the opposite edge position of the respective side <NUM>bai in relation to the series of eyelets <NUM> made along said side <NUM>bai, so that the band <NUM>bai overlaps the eyelets.

Each band <NUM>, in addition to the connecting strip to the respective sheet, also comprises reversible connecting means <NUM> to the respective adjacent sheet towards which the band protrudes. For example, these connecting means <NUM> comprise an upper connecting strip <NUM> provided on the lower face of the respective band and a lower connection strip <NUM> provided on the upper face of the adjacent sheet, with the two connecting strips which are adapted to fix each other in a reversible way. For example, the two connecting strips are male-female strips of a Velcro-type fastening system, suitably of the liquid-tight type. Considering the band <NUM>bai of the aforementioned sheet <NUM>ba, this comprises, near its lower edge, an upper female (or male) velcro connection strip <NUM>bai. On the adjacent sheet <NUM>ca, in the edge area of the upper side <NUM>cah, along this, there is a complementary lower connection male (or female) velcro strip <NUM>cah.

It should be noted that the lower connection strip with male (or female) velcro <NUM>cah is made on the adjacent sheet <NUM>ca in the opposite edge position of the respective side <NUM>cah in relation to the series of eyelets <NUM> made along said side <NUM>cah, therefore the band <NUM>bai overlaps the eyelets on this side too.

In this way the lower band <NUM>bai overlaps all the downwardly openings present on and between the two adjacent sheets <NUM>ba and <NUM>ca or rather the eyelets <NUM> and the space between the lower and upper sides of the two sheets, close to the elongated element 12T. In the event of rain, the water slides along the sheet <NUM>ba, passes over the lower band <NUM>bai sliding on the lower adjacent sheet <NUM>ca, overcoming the eyelets and the space between the sheets without slipping under the sheets.

The second band <NUM> associated with the sheet <NUM> is placed along a second contiguous and orthogonal side to the first lower side to which the first described band is associated. It is in practice a side band that covers the eyelets and the intermediate space between two laterally adjacent sheets.

Always taking the <NUM>ba sheet as an example (see <FIG> and <FIG>), the second band <NUM>bad is welded (or glued or other technology which allows a liquid tight seal, or a "waterproof" seal) along a respective union strip <NUM>, to the upper face of the sheet, parallel to its right side <NUM>bad (defined hereinafter also as "second side"). Said band <NUM>bad has a width (or rather, the left-right side dimension referred to the figures) such that it protrudes from the edge of the right side <NUM>bad and overlaps the edge area of the laterally adjacent sheet <NUM>bb.

It should be noted that the joining strip <NUM> is made on the sheet <NUM>ba in the opposite edge position of the respective side <NUM>bad in relation to the series of eyelets <NUM> made along this side <NUM>bad, so that the band <NUM>bad overlaps the eyelets.

Similarly to the first band <NUM>bai, the second band <NUM>bad, or rather the side band of the sheet <NUM>ba comprises, near its right edge, a upper connection strip of female (or male) velcro <NUM>bad. On the side adjacent sheet <NUM>bb, in the edge area of the left side <NUM>bbs, along this, there is a complementary lower connection male (or female) velcro strip <NUM>bbs.

It should be noted that the lower connection male (or female) velcro strip <NUM>bbs is made on the laterally adjacent sheet <NUM>bb in the opposite edge position of the respective side <NUM>bbs in relation to the series of eyelets <NUM> made along said side <NUM>bbs, so that the lateral band <NUM>bad overlaps the eyelets of this side too.

In this way the side band <NUM>bad overlaps all the openings to the right present on and between the two adjacent sheets <NUM>ba and <NUM>bb or rather the eyelets <NUM> and the space between the side edges of the two sheets, close to the elongated element <NUM>. In case of rain, the water slides along the side band <NUM>bad and can slide indifferently towards the sheet <NUM>ba or the sheet <NUM>bb, without slipping under the sheets.

The first band (or lower band) and the second band (or side band) can be made separately or, in an advantageous form of embodiment, in a single "L" shaped band.

<FIG> show an example of four adjacent sheets (according to a matrix arrangement 4x4 ba, bb, ca, cb), in which the overlapping of the sheets and their overlapping area are visible.

It should be noted that, preferably, the width of the bands, in the overlapping direction to the adjacent sheet, is such that the end edge of the band is downstream of the bottom connection male (or female) Velcro strip <NUM> which connected to the adjacent sheet (or rather the upper female - or male - velcro strip <NUM> is not placed exactly on the edge of the band, but further upstream of this).

The system <NUM> provides, for each sheet present on a first side close to the ridge <NUM>, a band welded also on the upper side of the sheet, (or rather a three-band configuration) such as to cover the space between the upper edges of the sheets along the ridge <NUM>. Each sheet present on the opposite side of the ridge has instead a configuration with two bands, as described above.

<FIG> show a cross section relative to the ridge <NUM>. Here is shown the ridge crosspiece 12T which divides the support structure of the sheets into two slopes. On the left side of the ridge, in relation to the figure, the sheet <NUM>ab is shown, with the side <NUM>abh parallel to the ridge <NUM> and spaced from it. On the right side of the ridge the sheet <NUM>AB is shown, similar , for example, to the sheet <NUM>ba described above.

This ridge sheet <NUM>ab advantageously comprises three covering bands <NUM>, a first lower band (not shown in these figures), which extends along the lower side of the sheet <NUM>abi, to close the gap between the sheet <NUM>ab and the edge of the adjacent lower sheet <NUM>bb, a second side band <NUM>abd, which extends along a lateral side of the sheet, to close the gap between the sheet <NUM>ab and the edge of the adjacent lateral sheet <NUM>ac, and a third upper band <NUM>abh which extends along the upper side <NUM>abh of the sheet <NUM>ab, to close the gap between the ridge sheet <NUM>ab and the edge of the adjacent sheet <NUM>AB on the other side of the ridge itself. As for the previous cases, the third upper band <NUM>abh is welded (or glued or other technology that allows a liquid tight seal, or a "waterproof" seal) along a union strip <NUM>, to the upper face of the sheet, parallel to its upper side <NUM>abh. The third band <NUM>abh has a width (or rather the dimension along the slant from bottom to top) such that it protrudes from the upper edge side <NUM>abh and crosses the ridge and overlaps the edge area of the adjacent sheet <NUM>AB on the other side of the ridge itself.

It should be noted that the joining strip <NUM> is made on the sheet <NUM>ab in the opposite edge position of the respective side <NUM>abh in relation to the series of eyelets <NUM> made along said side <NUM>abh, so that the band <NUM>abh overlaps the eyelets.

Also in this case, the band-sheet connecting means <NUM> include, in proximity of the upper edge, a upper female (or male) velcro connection strip <NUM>abh. On the adjacent sheet <NUM>AB, in the edge area of its upper side <NUM>ABh, along this, there is a complementary lower male (or female) velcro connection strip <NUM>ABh.

It should be noted that the lower male (or female) velcro connection strip <NUM>ABh is made on the adjacent sheet <NUM>AB in the opposite edge position of the respective side <NUM>ABh in relation to the series of eyelets <NUM> made along said side, so that the band <NUM>abh overlaps the eyelets of this side too.

In this way the upper band <NUM>abh overlaps all the openings downwards present on and between the two adjacent ridge sheets on opposite sides <NUM>ab and <NUM>AB, or rather the eyelets <NUM> and the space between the upper sides of the two sheets, close to the elongated ridge element 12T. In case of rain, the water falls on the upper band <NUM>abh and slides along the sheet <NUM>ab or <NUM>AB, passing over the eyelets and the space between the sheets without slipping under the sheets.

<FIG> show alternative connection means <NUM> in relation to the velcro. For example, the lower strip made on the adjacent sheet <NUM>', suitable for connection with said upper strip, comprises eyelet holes <NUM>, slotted, while the upper connection strip on the band <NUM> provides pins <NUM> facing downwards (fixed with fluid seal to the band), suitable to be inserted into respective eyelet holes <NUM>. The pins <NUM> are equipped with an anti-slip portion 26A from these eyelet holes <NUM>, movable in a reversible manner to assume an extraction configuration and an anti-slip configuration. In this example, the portion 26A has a complementary shape to the respective eyelet hole, or rather an elongated shape in one direction. This portion 26A rotates on an axis k coinciding with the insertion axis in the eyelets (or rather the axis of the pin), in order to be able to assume two configurations; a first configuration of insertion in the eyelet hole, in which the portion of the pin is rotated so as to be aligned with the development of the eyelet hole (to allow insertion), and a second configuration orthogonal to the first, with the portion 26A transversal to the development of the eyelet hole, which prevents the extraction movement of the pin <NUM> from the eyelet hole <NUM>.

In some embodiments, in place of the welded zones (or glued or other irreversible liquid-tight connection form), connection regions may be present as shown in <FIG> and described above, with coupling between pins and eyelets holes of the liquid-tight type, for example for the presence of gaskets between pins and holes.

<FIG> show an embodiment of a covering system not according to the invention.

In this case, the covering system, globally indicated with <NUM>, shows coverage bands for the spaces between the sheets <NUM> which are composed of several elements, as explained below. The sheets <NUM> are arranged inclined according to the slope Z, as in the previous example. In particular, there are two types of bands, a first band <NUM> and a second band <NUM>.

The first band <NUM> relates to the covering of the spaces between the sides of the orthogonal sheets to the direction of the slope Z, or rather those occupied by the crosspieces 12T, while the type of the second band <NUM> relates to the covering of the spaces between the sides of the parallel sheets to the direction of the slope Z, or rather those occupied by the longitudinal members <NUM>.

<FIG> shows nine sheets arranged in a matrix and numbered according to the previous example, and referring to the sheets of the columns "a" and "b", and the rows "b" and "c". Taking the <NUM>bb sheet as a reference, the first band <NUM> is divided into three parts. A first part <NUM>bbi is joined irreversibly, by means of its own joining strip <NUM> (for example welding or sealing with liquid tightness) along the lower side <NUM>bbi of the sheet <NUM>bb, made in an opposite edge position of the respective lower side <NUM>bbi in relation to the series of eyelets <NUM> made along this side.

A second part <NUM>cbh is irreversibly joined, by means of its own joining strip <NUM>, along the upper side <NUM>cbh of the sheet <NUM>cb lower adjacent to the sheet <NUM>bb, made on the sheet <NUM>cb in an opposite edge position of the side <NUM>cbh on which it is joined in relation to the series of eyelets <NUM> made along this side.

A third part <NUM>x of band <NUM>, has a rectangular shape and is a part released from the sheets before assembly, which is fixed to these by means of connection <NUM>, visible in <FIG>. In particular, such connection means allow connection of this third part <NUM>x to the second part <NUM>cbh (above that second part) and with the part of the sheet <NUM>bb in a position underlying the first part of the band <NUM>bbi, that is the part between the eyelets <NUM> and the joining strip <NUM> of the lower side <NUM>bbi.

In this example, these connecting means are the same as those described above with reference to <FIG> and the numbers relating to this example are indicated in parentheses.

In particular, this third part <NUM>x comprises, along its opposite sides, two parallel strips of pins <NUM> facing downwards (fixed with liquid tightness to the third part of the band <NUM>), adapted to be inserted in respective eyelet holes <NUM> made both along the second part <NUM>cbh of the first band <NUM>, and along the position below the first part of the band <NUM>bbi, or rather, as said the part comprised between the eyelets <NUM> and the joining strip <NUM> of the lower side <NUM>bbi.

Analogously to the example already described, the pins <NUM> are provided with a portion 126A anti-slipping from these eyelet holes <NUM>, movable in a reversible manner to assume a slip-off configuration and an anti-slip configuration. It should be noted that in <FIG>, the anti-extraction portion 126A is rotated into a sealing position and can not be removed.

Therefore, the first band <NUM> joins, with liquid tightness, in the direction of the slope, two adjacent sheets, preventing the water that slides on such sheets, to fall between the spaces around the crosspieces <NUM> and relative to the eyelets <NUM>. The first part of the band <NUM>bbi, preferably free above the third part, prevents the water from infiltrating under the third part of the band <NUM>x.

In an embodiment variant, not according to the invention, shown in <FIG>, the first band <NUM> is subdivided into only two parts.

A first part <NUM>bbi is joined irreversibly, by means of its own joining strip <NUM> (for example welding or liquid-tight gluing ) along the lower side <NUM>bbi of the sheet <NUM>bb, made in an opposite edge position of the respective lower side <NUM>bbi in relation to the series of eyelets <NUM> made along this side.

A second part <NUM>xk (which in practice is the combination of the second and third parts of the band <NUM> described above), has a rectangular shape and is a part released from the sheets before assembly, which is fixed thereto by connecting means <NUM>, visible in <FIG>, <FIG>. In particular, these connecting means allow the connection of this second part <NUM>xk with the part of the sheet <NUM>bb in a position below the first part <NUM>bbi, and with the part of the sheet <NUM>cb along its upper side <NUM>cbh of the sheet <NUM>cb, in an opposite edge position of the side <NUM>cbh on which it is joined in relation to the series of eyelets <NUM> made along this side.

For example, the connection means <NUM> are the pins and the eyelet holes described above, which however have a liquid tight coupling, for example due to the presence of gaskets between pins and holes.

The second band <NUM> can also be divided into three portions (see in particular <FIG>). A first portion <NUM>bbd is joined in an irreversible manner, by means of its own joining strip <NUM> (for example welding or liquid-tight gluing ) along the side <NUM>bbd of the sheet <NUM>bb, made in an opposite edge position of the respective side <NUM>bb with respect to series of eyelets <NUM> made along this side.

A second portion <NUM>bcs is irreversibly connected, by means of its own joining strip <NUM>, along the side <NUM>bcs of the sheet <NUM>bc laterally adjacent to the sheet <NUM>bb, made on the sheet <NUM>bc in an opposite edge position of the side <NUM>bcs on which it is joined to the series of eyelets <NUM> made along this side.

A third portion of band <NUM>x, has a rectangular shape and is a portion released from the sheets before assembly, which is fixed to these by means of the same connection means <NUM> described above. In particular, said connecting means allow the connection of such third portion <NUM>x with the second portion <NUM>bc and with the first portion <NUM>bbd, with the third portion which is arranged above them.

In particular, this third portion <NUM>x comprises (see <FIG>), along its opposite sides, two parallel strips of pins <NUM> facing downward (fixed with liquids seal to the third portion of the band <NUM>), adapted to be inserted into respective eyelet holes <NUM> made both along the second portion <NUM>bcs of the second band <NUM>, and along the first portion of band <NUM>bbd.

All the third parties <NUM>x or portions <NUM>x are connected to the sheets on their respective long side and to each other in contiguity on the short side.

It should be noted that the sheet <NUM>bb (as well as all the other sheets adjacent thereto) of this second embodiment, advantageously presents four rectangular flaps, of the same material of the sheet, welded along the four sides; the flap along the lower side <NUM>bbi corresponds to the first part of band <NUM>bbi of a first band <NUM>x placed lowerly, the flap along the upper side <NUM>bbh corresponds to the second part <NUM>abh of a first band <NUM>x placed above. The flaps along the lateral edges of the sheet <NUM>bb correspond respectively to the first portion of band <NUM>bbd and to a second portion of band <NUM>bbs for the connection to corresponding opposite second side bands <NUM>x.

Claim 1:
Modular covering system (<NUM>), to associate with one or more loadbearing structures (<NUM>,<NUM>), comprising
- a plurality of identical adjacent covering sheets (<NUM>) quadrangular in shape, adapted to be arranged adjacent to one another and at least partially according to a matrix arrangement,
- flexibles bands (<NUM>) for covering the border areas between adjacent sheets, arranged to overlap the edge areas of said sheets in the border areas they must cover, one band made by a single piece of continuous material being provided to cover the border area between two adjacent sheets,
- connection means (<NUM>) of said bands with the respective sheets, said connection means being adapted to provide a reversible connection with at least one of said sheets,
wherein said sheets comprise, along their perimeter, close to the edge area, a plurality of eyelets (<NUM>) for fixing to the supporting structures with which they are associated, by means of cables (<NUM>), hooks or the like; said covering bands (<NUM>) being arranged to overlap said eyelets,
wherein each sheet (<NUM>ba) comprises a first side (<NUM>bai) along which, parallel thereto, there is joined, by means of a joining strip (<NUM>) thereof, a said band (<NUM>bai), said band being arranged on the upper face of said sheet and protruding with respect to the edge of said first side to be able to overlap a sheet (<NUM>ca) arranged adjacent to said first side; said band comprising reversible connection means (<NUM>) to said adjacent sheet, said reversible connection means comprising an upper connection strip (<NUM>) provided on said band and a lower strip (<NUM>) produced on said adjacent sheet, adapted for connection with said upper strip,
wherein each sheet comprises a second side (<NUM>bad), contiguous to said first side (<NUM>bai), along which, parallel thereto, there is joined, by means of a joining strip (<NUM>) thereof, a second said band (<NUM>bad), said second band being arranged on the upper face of said sheet and protruding with respect to the edge of said second side to be able to overlap a sheet (<NUM>bb) arranged adjacent to said second side; said second band comprising reversible connection means to said adjacent sheet, said reversible connection means comprising an upper connection strip (<NUM>bad) provided on said second band and a lower strip (<NUM>bbs) produced on said adjacent sheet, adapted for connection with said upper strip.