Fastening system and screen installation for a greenhouse, as well as method for attaching the same

1. A fastening system, comprising a flexible sheet member and at least one flat strip attached to the sheet member,

said at least one flat strip having main surfaces that face away and are mutually parallel,

as well as at least one fastening section that has an undercut chamber and a longitudinal opening that opens into this chamber,

wherein the strip is accommodated in the chamber of the fastening section, in such a way that one of the main surfaces thereof faces towards the longitudinal opening and the other main surface faces away from the longitudinal opening, and so that the sheet member attached to the strip does not come into contact with inner walls of the chamber and extends out of the fastening section through the longitudinal opening thereof,

wherein the sheet member is fastened to the main surface of the strip facing towards the longitudinal opening at a fastening position that is located at the level of the longitudinal opening, and keeping free at least the other main surface of the strip, and

wherein the strip extends over the entire length of the flexible sheet member and is located at a distance from a free edge of the sheet member forming a free flap which is defined between the strip and the free edge of the sheet member, wherein the free flap extends at least out of the chamber into the longitudinal opening.

2. The fastening system according to claim 1 , wherein the flap extends from the longitudinal opening towards the outside.

3. The fastening system according to claim 1 , wherein the surface of the strip facing towards the longitudinal opening abuts against, or can be brought to directly abut against, an internal surface of the chamber on opposite sides of the longitudinal opening thereof.

4. The fastening system according to claim 1 , wherein the flat strip has a total thickness dimension that is at least one order of magnitude smaller than the width thereof.

5. The fastening system according to claim 1 , wherein the flexible sheet member is fastened to the strip by means of a fastening, as obtained by stitching, adhesion, melting, or riveting.

6. The fastening system according to claim 5 , wherein the fastening extends essentially in the centre of the strip, viewed from the widthwise direction of the strip.

7. The fastening system according to claim 5 , wherein the flexible sheet member and the strip are stitched together.

8. The fastening system according to claim 1 , wherein the undercut chamber of the fastening section has an essentially rectangular or square internal transverse cross-section.

9. The fastening system according to claim 1 , wherein the longitudinal opening is located essentially in the middle of one of a plurality of walls that delimit the chamber.

10. The fastening system according to claim 1 , wherein the widthwise direction of the strip is oriented transversely with respect to the flexible member.

11. The fastening system according to claim 1 , wherein the transverse cross-sectional dimensions of the strip and the transverse cross-sectional dimensions of the undercut chamber are selected in such a way that the strip is locked into the chamber to prevent the strip from leaving the chamber via the longitudinal opening thereof.

12. The fastening system according to claim 11 , wherein the undercut chamber of each fastening section is open on at least one longitudinal end thereof, for sliding a strip into the chamber with the flexible member and flap attached to the strip.

13. A method for assembling a fastening system according to claim 1 , comprising:

creating an assembly comprising a flexible sheet member and at least one flat strip fastened to the flexible sheet member which strip is fastened at a distance from the adjacent free edge of the flexible sheet member forming a free flap,

providing a fastening section that has an undercut chamber and a longitudinal opening that opens out into this chamber,

inserting the assembly into the free longitudinal end of the fastening section so that one end of the strip and the flexible sheet member fastened thereto and the flap fastened thereto reach into a longitudinal end of the fastening section, and the screen protrudes outwards from the longitudinal opening,

moving the assembly thus inserted into the fastening section along the fastening section.

14. The method according to claim 13 , comprising:

providing an assembly in the form of a roll, the roll centreline of which is oriented transversely to the longitudinal direction of the strip,

placing the roll close to a free longitudinal end of the fastening section,

unrolling the assembly of the roll and transferring the unrolled end of the assembly to the free or open longitudinal end of the fastening section.

15. The method according to claim 14 , comprising:

after unrolling the assembly, orienting the widthwise direction of the strip transversely with respect to the screen,

folding or turning over the flap with respect to the flexible sheet member,

subsequently introducing the strip into the fastening section.

16. A greenhouse or warehouse comprising a roof, a supporting structure on which the roof is supported, as well as a fastening system, wherein the fastening system comprises a flexible sheet member with flat strips attached to the sheet member, wherein each of said flat strips has main surfaces that face away and are mutually parallel, and fastening sections, each having an undercut chamber and a longitudinal opening that opens into this chamber,

wherein the flexible sheet member is suspended on opposite edges thereof on the supporting structure in each case by means of one of said strips that is accommodated in the chamber of one of said fastening sections, in such a way that one of the main surfaces of said strip faces towards the longitudinal opening and the other main surface faces away from the longitudinal opening, and so that the sheet member attached to the strip extends out of the fastening section at least into the longitudinal opening thereof and does not contact any interior walls of the chamber, wherein the sheet member is fastened to the main surface of the strip facing towards the longitudinal opening at a fastening position that is located at the level of the longitudinal opening, and keeping free at least the other main surface of the strip, and wherein the strip extends over the entire length of the flexible sheet member and is located at a distance from a free edge of the sheet member forming a free flap which is defined between the strip and the free edge of the sheet member, which flap extends from the fastening position on the strip out of the chamber at least into the longitudinal opening.

17. The greenhouse or warehouse according to claim 16 , wherein the screen is essentially horizontally-oriented, wherein the supporting structure is provided with mutually parallel beams, between which an essentially horizontal wire apron with mutually parallel wires is tensioned, and wherein the fastening sections are oriented transverse, preferably perpendicular, with respect to the wires of the wire apron, wherein the screen and at least one of the fastening sections, which at least one fastening section is implemented as a screen section, are supported by the wire apron so that they can be displaced back and forth, as well as a driving means for displacing the at least one screen section and the screen back and forth.

18. The greenhouse or warehouse according to claim 16 , wherein the roof comprises gutters and a ridge supported at a higher level than the gutters by means of rods between the gutters, wherein panels are accommodated between the ridge, the respective gutter, and the rods that extend from the gutter to the ridge, to form a roof part, and wherein the flexible sheet member extends at a distance from and essentially parallel to the roof part, thereby forming a cavity between the roof part and the flexible sheet member, which flexible sheet member is fastened in each case onto or close to the gutter and the ridge by means of a respective fastening system.

19. An assembly for use in a greenhouse or warehouse, comprising a flexible sheet member and at least one flat strip, which is fastened to the flexible sheet member, and which defines first and second main surfaces that face away and are mutually parallel, wherein the strip extends over the entire length of the flexible sheet member, wherein the flexible sheet member is fastened to the first main surface of the strip by means of a linear fastening obtained by stitching which extends essentially in the centre of the strip, viewed in the widthwise direction of the strip, and wherein the second main surface of the strip is kept free, and wherein the strip is located at a distance from a free edge of the sheet member forming a free flap which is defined between the strip and the free edge of the sheet member such that the sheet member does not come into contact with any internal walls of a chamber with a longitudinal opening in which the strip is inserted for use in the greenhouse wherein the free flap extends at least out of the chamber into the longitudinal opening.

20. The assembly according to claim 19 , which is rolled up around a centreline that extends transversely with respect to the longitudinal direction of the screen, to form a roll.