SYSTEM FOR COVERING

Abstract: The invention concerns a system for fastening a fabric (8, 8', 8'') such as tarpaulin cloth to form a barrier, to a structure (1), such as a building, a building facade, scaffolding or the like, said fabric (8, 8', 8'') having a leach edge arranged for insertion into open fabric-receiving channels in at least one fabric-holding rail (5) which is secured to the structure. The system comprises basic rails (3), said rails being secured to the structure (1) by means of fasteners (4') and having coupling means (6) interconnecting said basic rails (3) and said fabric-holding rails (5), said basic rails (3) preferably being arranged intermediate the fabric-holding rails (5) and the structure (1). Basic rails (3) and fabric-holding rails (5), when interconnected by said coupling means (6), extend in intersecting directions.

Description: SYSTEM FOR COVERING Technical Field The present invention relates to a system for fastening a fabric, such as tarpaulin cloth to form a barrier or enclosure. The fabric has a leach edge configured for insertion into open fabric-reception channels in at least one fabric-holding rail which is associated with the structure. Background of the Invention Screening of a structure by means of fabric materials may be used in several applications. For instance, it may be desirable to form a barrier around a building faςade during renovation and/or building. The barrier prevents polluted substances and the like emanating from the work on the faςade from dropping outside the barrier and it likewise blocks the building site from view. In addition, it makes it possible to heat the area within an essentially sealed barrier by means of e.g. building fans. Likewise, the barrier may prevent rain water and the like from coming into contact with the faςade. The invention thus relates to a system for fastening a fabric material intended to be used as a barrier, to a structure, such as a building faςade, but it likewise relates to fastening of such a fabric material to other structures, such as to a building and in particular to scaffolding. The Norwegian Published Specification No. 177 802 discloses a device for attachment of fabric panels to be used as a barrier, to scaffolding, said fabric panels being provided with a leach edge configured to be inserted into open fabric-receiving channels in at least one fabric-receiving rail which is associated with the scaffolding. The fabric-holding rail has a longitudinally extending undercut upper channel which is adapted for reception therein of a head of a screw device and which is arranged to prevent the screw device from rotating while at the same time allowing the head to be displaced freely along said longitudinal open channel. A clamping means is provided to be secured to the rail by means of the screw device and in addition it is also adapted for gripping a stay or the like of the scaffolding in order to attach the fabric-holding rail to the scaffolding. One disadvantage found in this prior-art device is that the fabric-holding rails extend along the stays. Usually, each fabric panel is secured between parallel fabric-holding rails. The stays to which the fabric- holding rails are attached thus must be arranged in parallel relationship, which is not always possible in narrow spaces or for other reasons. The spacing between two neighbouring stays must be adapted to the spacing at the fabric between the leach edges at opposite fabric panel edges that are attached to the associated fabric- holding rails, which is a limiting feature inasmuch as it is not always practical or even possible to locate stays of scaffolding at definite spacings from and in parallel with each other. Further, the screw device requires a tightening tool at least to be secured to the fabric-holding rail and possibly also to immobilise the clamping device. In addition, the clamping device in accordance with the shown embodiment comprises screw means by means of which a clamping yoke is attached around the stay. It is easily understood that the use of several screw devices and screw means for attachment of the fabric-holding rails to the scaffolding is time- consuming. Since each fabric-holding rail is secured by means of one or several clamping devices along the same stay it might also be able to rotate about said stay, should the clamping devices not be properly attached or be subjected to stress, such as when exposed to wind load. This problem is aggravated upon increasing lengths of the screw device, since the effects of the moment of force on the clamping device from wind load acting on the fabric increase in such cases. This problem is aggravated by the fact that it is not unusual that the distance from the points of attachment in a structure such as scaffolding to the fabric is comparatively long, , since the structure may be formed with projecting parts with which the fabric should not come into contact in order not to be damaged as a result of abrasion. Object of the Invention The object of the subject invention is to substantially reduce the above outlined problem. Summary of the Invention The above object is achieved by the system in accordance with the invention, possessing the characteristics defined in the appended claims. Thus, the system in accordance with the invention is essentially characterised in that it comprises basic rails, said rails being secured to the structure by means of fasteners and/or being arranged in a self-supporting manner, in that the system comprises coupling means interconnecting said basic rails and fabric-holding rails, said basic rails preferably being arranged intermediate the fabric-holding rails and the structure, and in that basic rails and fabric-holding rails, when interconnected with the aid of said coupling means, extend in intersection directions. Contrary to the above prior-art device the present system thus comprises basic rails which are attached to the structure and to which the fabric-holding rails are secured. This arrangements brings about several advantages which will appear from the following detailed description of embodiments with reference to the accompanying drawings. Brief Description of the Drawings The invention will be described in closer detail in the following by means of one embodiment with reference to the accompanying drawings wherein identic numeral references in the different drawing figures denote corresponding components. Fig. 1 is a partly broken perspective view which schematically illustrates one embodiment of an inventive system. Fig. 2 is a partly broken schematical view of one embodiment of the inventive system including horizontally disposed basic rails and vertically disposed fabric- holding rails. Fig. 3 is a partly broken perspective view which schematically illustrates one embodiment of an inventive system comprising horizontally disposed basic rails, some vertically arranged fabric-holding rails and some essentially horizontally arranged fabric-holding rails but with the basic rails extending so as to cross the two first mentioned rails and the last mentioned fabric- holding rails. Fig. 4 is a partly broken perspective view of one embodiment of an inventive fastener arranged to fasten a basic rail in accordance with one inventive embodiment and illustrated in dash-and-dot-lines in Fig. 4, to the structure, which in this case is in the form of pipe, for instance a pipe being a part of a building scaffold and illustrated in Fig. 4 in dash-and-dot-lines. Fig. 5 is a partly broken perspective view of one embodiment of an inventive coupling means arranged to interconnect a basic rail illustrated in dash-and-dot- lines in Fig. 5 with an inventive fabric-holding rail in accordance with one embodiment illustrated in Fig. 5. Fig. 6 is a partly broken perspective view of one embodiment of an inventive interconnection means arranged to interconnect the end portions of adjoining rails, such as two basic rails or, as illustrated in Fig. 6, two fabric-holding rails, the left-hand fabric-holding rail in Fig. 6 being shown in dash-and-dot-lines. Fig. 7 is an end view of an interconnection means in accordance with Fig. 6 and inserted into a fabric-holding rail. Fig. 8 is a partly broken perspective view of a second embodiment of an inventive fastener arranged to secure a fabric-holding rail to the structure, which in this case is in the shape of a pipe, for example a pipe included in building scaffolding. Description of Embodiments The embodiment illustrated in Fig. 1 comprises a construction, generally designated by reference numeral 1, in accordance with the shown embodiment being a scaffold or the like. The scaffold in the drawing figure comprises a plurality of vertically disposed pipes 2 to which the inventive system in accordance with one embodiment thereof is secured. The system illustrated in the left-hand part of Fig. 1 comprises a plurality of basic rails 3 extending essentially in parallel with at least some of the pipes 2 to which they are secured by means of fasteners 4' . In turn, the basic rails 3 are connected to fabric- holding rails 5 by means of coupling means 6 (see Fig. 5) . The fabric-holding rails 5 and the basic rails 3 intersect and in accordance with the embodiment illustrated in the left-hand part of Fig. 1 the fabric- holding rails extend essentially horizontally so as to cross the basic rails 3 at an angle of approximately 90°. The fabric-holding rails 5 are formed with longitudinal open fabric-reception channels 7 (see embodiment of Fig. 5) . A fabric panel 8, such as a tarpaulin cloth etcetera, is formed with a leach edge (not shown) , preferably extending along the peripheral edges of the fabric panel 8 and the fabric-receiving channels 7 are configured for reception therein of said leach edge. The left-hand part of Fig. 1 illustrates several fabric panels 8 the upper and lower leach edges of which have been inserted into the fabric-reception channel 7 of an associated fabric- holding channel 5. Thus, the fabric panels 8 are maintained in a comparatively well tightened condition between an upper and a lower fabric holding rail 5. The lower part of Fig. 1 illustrates another example of a fabric panel 8' disposed close to the ground and having only an upper leach edge fitted into the fabric reception channel 7 of the corresponding fabric-holding rail 5. The right-hand part of Fig. 1 illustrates an alternative embodiment of the invention according to which joining means 4'' directly connect a fabric-holding rail 5 to the structure 1, the latter being in the form of a pipe 2. In accordance with this embodiment the fabric-holding rail 5 extends essentially vertically and the lateral edges of the fabric panels 8' ' are connected to the fabric-receiving channels 7 of the fabric-holding rail 5 via leach edges (not shown) . Fig. 2 illustrates another embodiment of the invention according to which essentially horizontal basic rails 3 are attached by means of fasteners 4' to a structure, such as scaffolding including pipes 2. The fabric-holding rails 5 cross the basic rails 3 and via coupling means 6 (see Fig. 5) they are connected to said basic rails 3 in the area of the point of intersection of rails 3 and 5. The right-hand part of Fig. 2 illustrates fabric panels 8'' the lateral edges of which are connected to the fabric-receiving channels 5 of the fabric-holding rails 5 via leach edges (not shown) . Fig. 3 illustrates a further embodiment of the invention wherein basic rails 3 extend essentially hori- zontally and are attached to a structure, such as the pipes 2 of a scaffold, via fasteners 4' . Fabric-holding rails 5 cross the basic rails 3 and in the lower part of Fig. 3 they extend essentially vertically. Via angled fabric-holding rails 9 and 10, respectively, these fabric-holding rails 5 are interconnected with essentially horizontal fabric-holding rails 5, shown in the upper part of Fig. 3. Via two interconnection means 11 (see embodiment in Fig. 6) the end portions of the left-hand angled fabric-holding rail 9 of Fig. 3 are interconnected with the essentially vertical left-hand lower fabric-holding rail 5, according to Fig. 3, and the essentially horizontal upper, left-hand fabric-holding rail, according to Fig. 3, respectively. The lower end portion of the right-hand angled fabric-holding rail 10, according to Fig. 3, is connected, via an interconnection means 11, with the essentially vertical lower right-hand fabric-holding rail 5, according to Fig. 3. The upper end portion of the fabric-holding rail 10 is formed with an aperture intermediate the fabric-receiving channels 7 through which extends the pipe 2. The essentially horizontal upper right-hand fabric-holding rail 5, according to Fig. 3, is connected to the pipe 2 via an interconnection means, such as means 11, and has such an extension that its corresponding fabric-receiving channel 7 extends in essentially the same direction as the fabric-receiving channels 7 formed in the upper end portion of the angled fabric-holding rail 10. This is achieved in accordance with the shown embodiment by connecting the interconnection means 11 to the attachment of the upper joining means 4' to the pipe 2, the positioning of the upper basic rail vertically, and thus of the upper right-hand fabric-holding rail 5 vertically, is determined by the essentially vertically extending arm 12 of the joining means 11. In accordance with the embodiment the invention illustrated in Fig. 3 a transitional area thus is obtained from a vertical stretch of the barrier to a lateral stretch thereof in a structure such as scaffolding. With reference to Figs. 4-6 some parts of the inven¬ tion will be described more in detail. Fig. 4 shows one embodiment of an inventive fastener 4' . The right-hand part of the fastener 4', according to Fig. 4 is, according to the shown example, secured to the pipe 2 by means of a clamping device known per se. The clamping device comprises two rigid arms 13 the central portion of which is of semi-circular configuration, said arms being connected to a plate 14. The distal end portions of the arms 13 are connected with a pin 15 forming a hinge about which a clamping piece 17 may pivot by means of loop-shaped portions 16. The central portion of the clamping piece 17 is of semi-circular configura¬ tion. A wedge-shaped piece 18 is positioned at the front end portion of the clamping piece 17. The wedge-shaped piece 18 is formed with an elongate loop (not shown) through which extends a shaft 19. The two end portions of the shaft 19 are connected to the clamping piece 17, the wedge-shaped piece 18 thus being connected with the shaft 19 for limited movement. In Fig. 4 the wedge-shaped piece 18 is illustrated in an essentially vertical wedged position, wherein it engages with and securely wedges the front end portion of the clamping piece 17 and the front end portions of the arms 13. In this position the clamping device and thus the fastener 4' are secured to the pipe 2. When displaced to an essentially horizontal position in Fig. 4 (not shown) the wedge-shaped piece 18 may be moved between the front end portions of the arms 13, making it possible to release the clamping device and thus fastener 4' from the pipe 2. The fastener 4' comprises a joining piece 20' con¬ stituted in accordance with the shown embodiment by a pin and connecting the clamping device with fastening means, generally designated by 21. The fastening means 21 is formed in accordance with the embodiment of Fig. 4 with a back-up portion 22 in the shape of a bead provided at the end of said joining piece 20' . Fig. 4 also shows one embodiment of an inventive basic rail 3. In accordance with the shown embodiment the basic rail 3 comprises four open, longitudinal undercut coupling channels 31, 32, 33, 34. The bead is insertable into and movable along the coupling channel 34 and preferably, it is likewise insertable into and movable along the other coupling channels 31, 32 and 33. The fastening means 21 also comprises a tightening device, generally designated by numeral reference 23, adapted to clamp the bead to the basic rail 3. In accordance with the shown embodiment the tighten¬ ing device 23 comprises a wedge-shaped member generally designated by 24. The wedge-shaped member 24 has a move- able wedge piece 25 and an abutment piece 26 which is fixedly mounted on the joining piece 20' and positioned externally of the coupling channel 34, when the back-up piece 22 is inserted into the coupling channel 34. The wedge piece 25 is arranged to wedge the back-up piece 22 to the coupling channel 34 by engagement of said abutment piece 26 with the outer face of the basic rail 23 that is turned towards the wedge piece 25. In accordance with the shown embodiment the wedge piece 25 is formed with an elongate loop portion 27 through which extends the joining piece 20' . In accordance with the shown embodiment the abutment piece 26 is formed with lateral faces 28, 29, 30 essentially enclosing those lateral faces of the cross-section of the wedge piece 25 that are turned away from the back-up piece 22. The back-up piece 22 surrounds at least a part of that lateral face of the cross-section of the wedge piece 25 that is turned towards the back-up piece 22, whereby the wedge piece 25 will be secured to the joining piece 20' for restricted movement in its lengthwise direction. During normal operation of the fastener the wedge piece 25 cannot be removed from the fastener in the same manner as the wedge 18 of the clamping device, with the result that all components of the fastener form an integral unit. The wedge piece 25 is likewise formed with abutment faces at both ends, facilitating ramming of the wedge piece 25 into and out of, respectively, the wedging position. Fig. 5 shows one embodiment of an inventive coupling means 6 for joining together said basic rails 3 and fabric-holding rails 5. Fig. 5 likewise illustrates one embodiment of a fabric-holding rail 5 having an open, longitudinally extending coupling channel 35 which is undercut and turned towards the basic rail coupling channel 31. The coupling channels 31 and 35 are intended to interconnect the two rails 3 and 5, respectively. The coupling means 6 is formed with a joining piece 36 comprising two fastening members 21' of the same type as the fastening member 21 illustrated in Fig. 4 and comprising tightening devices 23' and wedge-shaped members 24' . The fastening members 21' are adapted to be clamped to coupling channels 31 and 35, respectively. The beads of the fastening members 21 and 21' , shown in Figs 4 and 5, respectively, preferably are configured to fit the associated coupling channel so as to allow the individual bead to be turned inside the associated coupling channel when in its non-clamped position, the bead preferably being of cylindrical shape. Owing to this arrangement the basic rails 3 and the fabric-holding rails 5 need not intersect at a certain angle, such as 90°, increased possibilities thus being created regarding how to secure the rails relatively to one another, compared with prior-art technology. Figs 6-7 illustrate one embodiment of an inventive interconnection means, generally designated by 37, which is designed to join together the end portions of neighbouring basic rails and fabric-holding rails, respectively. For exemplifying purposes, Fig. 6 illustrates the manner in which the end portions 41, 42 of two neighbouring fabric-holding rails 5 may be inter- connected by means of the interconnection means 37. The interconnection means 37 comprises a back-up piece 38 in the shape of a body which is insertable into and movable along the coupling channel 35 of the fabric-holding rail 5. When inserted, the body extends along said coupling channel 35 and at each end it supports a joining piece 39, one end of which is attached to the body and the opposite end of which is arranged to extend through the coupling channel 35 in its said inserted position. In addition, each joining piece 39 of the interconnection means 37 supports a tightening device, generally designated by numeral reference 40 and arranged to fasten the body to the end portions 41, 42 of the respective fabric-holding rails in such a position that said body bridges said end portions 41, 42 inside the coupling channels 35 of the neighbouring rails. In accordance with the shown preferred embodiment shown in Figs 6-7 the tightening device 40 comprises a wedge-shaped member, generally designated by numeral reference 46 and being of the same type as the wedge- shaped members 24 and 24', respectively, shown in Figs 4-5, respectively, the wedge-shaped member 43 in this case arranged to wedge the back-up piece 38 in position inside the coupling channel 35, interconnecting the two end portions. In a similar manner to back-up pieces 22 and 22' , respectively, the back-up piece 38 in accordance with this embodiment surrounds at least a portion of that lateral face of the cross-section of the wedge piece forming part of the wedge-shaped member 43 that faces the back-up piece 38, said wedge piece being secured to the joining piece 39 for limited movement in its longitudinal direction. In accordance with the preferred embodiment illustrated, the body is formed with guide faces (see Fig. 7) co-operating with the lateral walls of the coupling channels 35 and being operative to ensure that two interconnected rails assume a position in alignment with one another horizontally and also ensuring non- torsional interconnection of said rails. In turn this arrangement ensures that the interconnection of basic rails and fabric-holding rails with the aid of an inventive interconnection means 37 is such that coupling channels and, when used, fabric-holding channels of said rails will have an essentially continuous extension also in the internal joint area. Fig. 8 illustrates an alternative embodiment of the invention according to which a fabric-holding rail 5 in¬ cluding a fastener 4'' is secured directly to a structure in the shape of a pipe 2 by means of a clamping device of the same type as that illustrated in Fig. 4. The joining piece 20'' in Fig. 8 is also somewhat longer than the joining piece 20' in Fig. 4. The fabric-holding rail 5 in Fig. 8 extends essentially in parallel with the pipe 2. However, it is easily understood that the fabric-holding rail 5 in Fig. 8 could have a different extension in the area where it crosses that of the pipe 2 and thus be secured to several spaced-apart pipes forming part of the structure. In accordance with a preferred embodiment of the invention all coupling channels 31, 34 used in the embodiment above in the basic rail 3 and the coupling channel 35 in the fabric-holding rail are adapted to receive an optional one of either back-up piece 22 or 38 of the fasteners 4', 4'', of the coupling means 6, and of the interconnection piece 37. Preferably, this option feature is applicable also to the coupling channels 32 and 33 of the basic rail 3 to which coupling channels fasteners 4', 4'', coupling means 6, and interconnection means 37 may also be secured. In this manner the invention provides a flexible system. According to one embodiment (not shown) the fabric- receiving channels 7 of the fabric-holding rails 5 are formed with apertures through which leach edges of the fabric panels may be inserted into or removed from the fabric-receiving channels in order to facilitate fastening of the fabric panels to the fabric-holding rails. In accordance with another embodiment (not shown) the coupling channels of the basic rails and/or the fabric-holding rails of the system are formed with apertures through which back-up pieces, such as pieces 22, 22' or 38, may by slid into or out of the coupling channels in order to facilitate fastening of such pieces as fasteners 4', 4'', coupling means 6, or inter¬ connection means 37 to the coupling channels. When basic rails 3 are used they are shown in the drawings figures in a position intermediate the fabric- holding rails 5 and the very structure. This is a preferred embodiment but it is easily understood that it is quite possible to use the inventive system in cases where at least the basic rails are located interiorly of at least parts of the structure. This could be achieved by e.g. interconnecting basic rails and pipes forming part of the structure in such a manner that the joining pieces of the fasteners extend towards the interior of the structure, whereby the basic rails will assume a position interiorly of said pipes, the coupling means being arranged to project outwardly from said basic rails to an area externally of the construction, in which area fabric-holding rails are provided. Therefore, said pipes forming part of the structure will be arranged between the basic rails and the fabric-holding rails in question. In accordance with the embodiments illustrated the basic rails and the fabric-holding rails are inter¬ connected with the aid of coupling means mounted in facing coupling channels. The arrangement according to which the basic rails and the fabric-holding rails are formed with facing coupling channels is a preferred embodiment but it is easily understood that this arrangement is not essential to the invention. For instance, the coupling channel of the basic rail could be turned away from the coupling channel in the fabric- holding rail and the interconnection of the coupling channels could be achieved for instance by means of a coupling means having a joining piece of such an angled configuration that the two fastening means of the coupling means could be arranged in their respective one of the coupling channels. When using intersecting basic rails and fabric- holding rails that are attached to one another in the manner taught by the invention the spacing between the fabric-holding rails could be adapted to the fabric, independently of the spacing between the basic rails, which increases the freedom and the independence with respect to the choice of the place of attachment of the basic rails to the structure compared to when fabric- holding rails are attached directly to or in parallel with stays, as in accordance with prior-art technology. Since interconnected basic and fabric-holding rails intersect and the basic rails are connected to the structure in different places the invention also provides a non-torsional, stable system which is capable of absorbing comparatively heavy wind loads. This is achieved also in case the fasteners and/or the coupling means have joining pieces of comparatively long dimensions, despite the consequential increase of the momentum of force on the system. Owing to the use in accordance with the illustrated embodiments of the invention of fastening means including wedge-shaped members the system is easily mounted on and dismantled from, respectively, a structure. It is easily understood that it is possible to deviate somewhat from the described embodiments. The structure, to which the system is attached, thus need not be a scaffold. Instead, the fasteners of the system could be attached in any suitable manner to any structure, such as directly to a fagade, using another suitable device than the clamping device of Figs 4 and 8 for attachment to the faςade. All varieties and modifications that are comprised by the general inventive idea should, however, fall within the scope of the appended claims. Within the scope of the invention it is even possible that the structure comprising basic and fabric-holding rails is self-supporting and thus does not necessarily have to be secured to a separate structure. This could be the case, for instance, as regards detached covering devices.

Claims: CLAIMS 1. A system for fastening a fabric (8, 8', 8''), such as tarpaulin cloth, to form a barrier or enclosure, said fabric (8, 8', 8'') having a leach edge arranged for insertion into open fabric-receving channels (7) in at least one fabric-holding rail (5) which is secured to the structure (1) , c h a r a c t e r i s e d in that said system comprises basic rails (3), said rails being secured to the structure (1) by means of fasteners (4') and/or being arranged in a self-supporting manner, in that the system comprises coupling means (6) inter¬ connecting said basic rails (3) and fabric-holding rails (5) , said basic rails (3) preferably being arranged intermediate the fabric-holding rails (5) and the structure (1), and in that basic rails (3) and fabric- holding rails (5), when interconnected with the aid of said coupling means (6), extend in intersecting directions. 2. A system as claimed in claim 1, c h a r a c - t e r i s e d in that at least two basic rails (3) extend in an essential vertical direction, and in that at least two fabric-holding rails (5) which are connected to said basic rails (3) extend in an essentially horizontal direction. 3. A system as claimed in claim 1, c h a r a c ¬ t e r i s e d in that at least two basic rails (3) extend in an essentially horizontal direction, and in that at least two fabric-holding rails (5) , which are connected to said basic rails 3, extend in an essentially vertical direction. 4. A system as claimed in any one of the preceding claims, c h a r a c t e r i s e d in that the basic rails (3) and the fabric-holding rails (5) are formed with open longitudinal and undercut coupling channels (31, 35), said channels preferably arranged in facing relationship for interconnection of the two rails (3, 5), and in that the coupling means (6) comprises a joining piece (36) having two fastening means (21' ) arranged to be fastened to said coupling channels (31, 35) . 5. A system as claimed in claim 4, c h a r a c ¬ t e r i s e d in that the basic rails (3) are formed with a second open longitudinal and undercut coupling channel (34) for attachment to said structure (1), and in that the fastener (4') is formed with a joining piece (20') having a fastening means (21) at its end facing the basic rail (3), said fastening means arranged to be fastened to said second coupling channel (34) . 6. A system as claimed in claim 4 or 5, c h a r ¬ a c t e r i s e d in that the fastening means (21; 21' ) has a back-up up piece (22, 22' ) in the shape of a bead provided at the end of said joining piece (20' ; 36) and being insertable into and movable along the associated coupling channel (34; 31; 35), and in that the fastening means (21; 21') is formed with a tightening device (23; 23' ) arranged to fasten the bead to the rail (3; 5) . 7. A coupling means as claimed in claim 6, c h a r a c t e r i s e d in that the bead is configured in conformity with the coupling channel (34; 31; 35) in such a manner as to be turnable inside the coupling channel (34; 31; 35) in the non-fastened condition, said bead preferably having a cylindrical configuration. 8. A system as claimed in any one of claims 4-7, c h a r a c t e r i s e d in that the system comprises at least one interconnection means (37), said interconnec¬ tion means (37) arranged to interconnect the end portions (41, 42) of adjoining basic rails and fabric-holding rails, respectively, and being provided with a back-up piece (38) in the form of a body which is insertable into and movable along the associated coupling channel (35), in that the body, when in its inserted position, extends along said coupling channel (35) , said body preferably having guide faces thereon co-operating with the faces of the coupling channel (35) , in that each body end is formed with a joining piece (39), one end of which is attached to the body and the opposite end which is arranged to extend through the coupling channel (35) in said inserted position, and in that a tightening device (40) is provided at each joining piece (39) of the interconnection means (37), said device (40) arranged to fasten the body to the end portions (41, 42), respect¬ ively, of the associated rail in a position, wherein said body bridges said end portions (41, 42) of the coupling channels (35) of the respective rails. 9. A system as claimed in any one of claims 6-8, c h a r a c t e r i s e d in that the tightening device (23; 23'; 40) comprises a wedge-shaped member (24; 24' ; 43), that said wedge-shaped member is formed with a movable wedge piece (25) and with an abutment (26) rigidly formed on the joining piece (20' ; 36; 39) , said abutment extending externally of the coupling channel (34; 31; 35) when the back-up piece (22; 22'; 38) is inserted in the coupling channel (34; 31; 35), and in that the wedge piece (25) is arranged to securely wedge the back-up piece (22; 22'; 38) inside the coupling channel (34; 31; 35) by engagement of said abutment (26) with said rail (3; 5) . 10. A system as claimed in claim 9, c h a r a c ¬ t e r i s e d in that the wedge piece (25) is formed with an elongate loop (27) through which runs said joining piece (20' ; 36; 39) , in that the abutment (26) is formed with lateral faces (28, 29, 30) essentially enclosing lateral faces of the cross-section of the wedge piece (25) that are turned away from the back-up piece (22; 22'; 38), and in that the back-up piece (22; 22' ; 38) surrounds at least a part of the lateral face of the cross-section of the wedge piece (25) that is turned towards the back-up piece (22; 22'; 38), said wedge piece (25) being mounted on said joining piece (20' ; 36; 39) for restricted movement in its longitudinal direction. 11. A system as claimed in any one of claims 4-10, c h a r a c t e r i s e d in that all coupling channels (34, 31, 35) in the basic rails (3) and in the fabric- holding rails (5) are adapted to receive an optional back-up piece (22; 22' ; 38) .

Inventors: NYLANDER BERNT, NYLANDER, BERNT
Applicants: JONSERED MILJOESYSTEM AB, NYLANDER BERNT, NYLANDER, BERNT
Application year: 1997
Main classification: E04G21
IPC codes: E04G5, E04G7, E04G21