DEVICE AT FENCE SYSTEM TO CONNECT WIRE NETTING AND PROFILE MOULDING

Abstract: Device at fence systems, comprising wire netting (1), moulding strips (2) having at least one longitudinally extending track (3) and fittings (9) for connecting wire netting and moulding strips. The tracks (3) of the moulding strips have an opening (4) which is restricted by two longitudinally extending wall parts (5, 6) inside which the track expands. The wire netting (1) has an outer edge part along which, at least partly, the outermost edge is a edge wire (8). This at a joining to a moulding strip (2) is introduced through an opening (4) of the track (3) and is moved to the side inside a first (5) of said wall parts (5, 6). The fittings (9) have a locking part (10) and a gripping part (11), that the locking part (10) projects from the gripping part (11) and is designed in such a way that it can be introduced through the opening (4) of the moulding strip in at least two opposite turning positions. The locking part (10) at its free end has a hook (14) or the like projecting in one direction, which hook is arranged to extend in the longitudinal direction of the opening in said turning positions. Said hook (14) is arranged to, in at least one of said locking positions at the turning of the gripping part (11) into one locking direction, enter into locking engagement underneath the second wall part (6), whereby the locking part (10) fix the edge wire (8) inside the first wall part (5). The fitting (9) can, at dismounting of the fence, be brought out off locking position by a simple turming movement.

Description: DEVICE AT FENCE SYSTEM TO CONNECT WIRE NETTING AND PROFILE MOULDING The present invention relates to a device at fence system comprising wire netting, moulding strips having at least one longitudinally extending track for connecting wire netting and moulding strips. In industries, it is suitable to fence in machinery for security reasons, which machinery can cause cut or jamming, by using a protecting fence or the like. Similar needs are present within the process industry. Further, it is of utmost importance to fence in industry robots, which to a occasional visitor can move unpredictable, with some sort of protecting fence. It is particularly important to prevent unauthorised personal to come close to dangerous machinery and the like, on one hand due to the risk for damages, on the other hand due to the fact that the visitor by purpose or imprudence may damage sensitive equipment or disturb a manufacturing process. Many factories have many visitors and it is unsuitable to have fences that has a marking function only and can be easily passed. For security reasons it is necessary that the fences are hard to pass. At reconstruction of factories, e.g., in connection with installation of new machinery or reconstruction of machinery it is often desirable to have occasional fences. Even occasional visits to a factory can lead to the necessity of rapidly protecting sensitive equipment from insight. The need for occasional fences can also exists at tests and test runnings of a sensitive nature, and which has to be kept secret. Thus there is a great need for fence systems which are easily mounted, easily dismounted and which simultaneously have a good fencing function. An important aspect is certainly the cost factor of the fence system, as well, as it may quite often be large surfaces that need fencing. It is known from our own Swedish Patent Application 9702620-7 a fence system which for many reasons functions quite well. By means of the present invention means have been obtained of the kindly mentioned in the preamble, which even in a comparison with the means of the said patent application is considerably more simple to mount and dismount. The means according to the present invention is characterized in that the moulding strips have an opening which is restricted by two longitudinally extending walls within which the track expands, that the wire netting has an outer edge part along which, at least partly, the outermost edge is a edge wire, that this at a joining to a moulding strip is introduced through an opening of the track and is moved to the side inside a first of said wall parts, that the fittings have a locking part and a gripping part, that the locking part projects from the gripping part and is designed in such a way that it can be introduced through the opening of the moulding strip in at least two opposite turned positions, that the locking part at its free end has a hook or the like projecting in one direction, which hook is arranged to extend in the longitudinal direction of the opening in said turned positions, that said hook is arranged to, in at least one of said locking positions at the turning of the gripping part into one locking direction, enter into locking enganment underneath the second wall part, whereby the locking part fix the edge wire inside the first wall part, and that the fitting being fixed by the edge wire is releaseable by a returning turning. The great advantage using the means according to the present invention is that no tools are needed at all to join the moulding strips and the wire netting to continuous fences, and to dismount fences present. Thus one eliminates, in comparison with the device in accordance with the above mentioned application, the time consuming mounting work which is required to join and disjoin, respectively, moulding strips and netting parts using screws. At the device in accordance with the present invention there is only required some simple hand grips to apply and lock a fitting for joining a netting part to a moulding strip, and to release the fittings, respectively. The invention will be described in the following more in detail with reference to a suitable embodying example which is shown on the accompanying drawings, whereby on Fig. 1 a netting system according to the invention is shown. Figure 2 shows a perspective view of a suitable moulding strip. Figure 3 shows a suitable netting of the fencing system according to the present invention. Figures 4-6 show four different perspective view of a suitable embodying example of a fitting for joining moulding strips and netting parts. Figures 7-9 show how the connection of moulding strip and netting parts is made step by step using the fittings. Fig. 10 shows a modified embodying example compared to the fitting according to Fig. 4-6. Figure 1 shows a fence built of netting parts 1 and moulding strips 2, which, as evident from the drawing are applied as frame sides into rectangular frames of a consecutive fencing system. A particularly suitable embodiment of the moulding strip 2 is shown in figure 2. The moulding strip can have another design. The essential thing is that the moulding strip has at least one longitudinally extending track 3 which in cross section can be T-shaped, dovetail shaped, or the similar. The moulding strip 2 of figure 2 is symmetric having four tracks 3, one along each side of a four-sided moulding. This design is particularly suitable as a moulding strip of this kind can be used for connecting two fencing parts 1 which runs in the same or different directions. The tracks 3 of the moulding strips have a, in relation to the size of the tracks, relatively narrow opening 4. This is restricted by wall parts 5, 6, inside which the track widens uniformly in opposite directions. In figure 3 a particularly suitable embodiment of a netting is shown. This consists of a square shaped net with horizontal and vertical wires 7, and 8, respectively, whenin a upright position. The horizontal wires 7 are all situated on the same side of all crossing, vertical wires 8. The horizontal wires are welded together with the vertical wires in each joint. The outermost edge of each wire edge part 1 is an edge wire 7 and 8, respectively, to facilitate connection with the moulding strips, which will be described more in detail herein below. The fitting shown in Figs. 4-6, which as a totality has been denoted 9, consists of a locking part 10 and a grip part 11. The grip part is oblong having a flat or planar underside 12 and from said underside the locking part projects perpendicularly from a site near one end of the grip part. At the other end of the grip part there is arranged on the underside 12 a stop neck 13, which as will described more in detail below, cooperates with the track to restrict the turning movement of the fitting. The fitting 9 is suitably cast in one piece of plastic material. The locking part 10 is provided with a hook 14 which projects sidewise. This hook consists of two continuous parts running in the longitudinal direction of the fitting, of which a first part 15 is relatively thick seen in the projecting direction from the planar underside of the grip part of the locking part, and when subject to stress it is non-flexible, while the other part 16 is relatively thin. A fastening part 17 of the grip part comprising a part of the said planar surface 12 projects sidewise outside the locking part in the same direction as the hook 14 and forms, together with this, a slot shaped space 18, which, as will be described below, is intended to receive one of the wall parts 5 or 6, respectively, of the track, when the fitting has been applied and when it has been turned into locking position. The slot shaped space 18 is wider right in front of the thicker first part 15 than right in front of the thinner part 16 and the width of the slot diminishes further in the direction to the free end 16' of the thinner part. The slot width right in front of the thinner part 16 has been dimensioned in relation to the thickness of the wall parts 5, 6 of the moulding strips so that the thinner part of the hook is resiliently abutting the wall part 5 or 6, respectively, of the track, when it is applied in the slot shaped space. This resilient function allows tolerances of the thicknesses of the wall parts 5 and 6. The locking part 10 has, between the planar surface 12 of the grip part and the hook 14 a substantially cylindric part, the diameter of which has been so chosen that it is substantially fitting the width of the opening 4 of the moulding strip. The cylindrical part gas a radially projecting thin rib 19 arranged right in front of the slot 18, which rib is intended to compensate for fitting tolerances of the width of the opening and of the diameter of the cylindrical part. The moulding strip is preferably made of aluminum which material has many advantages when used as a moulding strip. One drawback of aluminum is, however, that the manufacturing exactness with regard to dimensions is low, and that the fitting tolerances thereby become large. This has as mentioned above been compensated for by arranging the Right in front of the hook part 15 the locking part is provided with a projecting corner 20 which is intended to serve as a latch and thereby only allow turning of the fitting in one turning direction at the application of the fitting onto the moulding strip as described below. In figures 7-9 a cross-section of the moulding strip 2 is shown and how a fence part is being applied onto the moulding strip and locked using the fitting 9. In figure 7 an edge wire 8 has been introduced through the opening 4 to a track 3 and been moved to the side underneath a wall part 5. Figure 7 even shows how the fitting is introduced into the track. The locking part of the fitting 9 is more narrow at the longitudinal direction of the grip part than in the cross-section of the grip part, in which direction the hook 14 projects. The locking part is dimensioned in relation to the opening 4 in such a way that it can be introduced through the opening when the hook stretches across the opening, such as shown in Fig. 7. In figure 8 the locking part is introduced through the opening and locks in this position the edge wire 8 against a sidewise movement, i.e., downwards in Fig. 8. It is per se possible to introduce the locking part through the opening of the track if the fitting is applied through the opening in an opposite turning position, i.e., having the end part 10' of the grip part directed upwardly in Fig. 8. In such a turning position the projecting corner 20 prevents that the fitting can be turned to the locking position shown in Fig. 9. The projecting corner 20 will then enter into engagement with the edge wire 8. When the fitting has been brought into the track, as shown in Fig. 8, it can be turned anticlockwise in the direction of the arrow A, whereby the broad, slot shaped space right in front of the broad part 15 of the hook, is firstly applied around the wall part 6 and whereafter the thinner part 16 of the hook is applied in a resilient abutment to the wall part 6 for locking the fitting. When the fitting goes into locking position which position is shown in Fig. 9 the projecting corner snaps down inside the edge part of the opening at the wall part 6. As evident from Fig. 9 the edge wire 8 and thereby the fence part 1 locked sidewise. The diameter of the netting wire 7,8 and the depth of the track has, however, been given such dimensions that the fence can be moved to some extent longitudinally, i.e., in the direction of the netting wires 7 of Fig. 9. This tolerance play which is present in all moulding strips 2 serving as fence poles or frames facilitates the mounting of the fence as the distance between neighbouring or a number of fence poles can be varied somewhat by utilizing said tolerance play. A further important advantage of the means according to the present invention compared with previously known embodiments where the edge wire is fixed by screwing this, is that a fence part attached into a moulding strip, as shown in figure 9, can be turned somewhat in the direction of the arrow B, as there is a certain play for the edge wire 8 even sidewise. This turning possibility of the fence parts facilitates the building of the fence as the fence becomes more easily adaptable to different directions. The embodying example shown in figure 10 corresponds substantially to that embodying example which is shown of figs. 4-6 and corresponding parts have been provided with the same reference numbers. In the embodiment according to figure 10 the projecting corner 20 has been eliminated. Further the stop neck 13 is evenly thick. The fitting 9 according to figure 10 can be introduced in the way as shown in figure 8 but can also be attached having the grip part in opposite direction. The fitting thus becomes turnable in two directions as the projecting corner 20 is eliminated. The end parts of the stop neck 13 snap inside the edge parts of the wall parts 5, 6 when the fitting move into locking position. He fitting 9 is intended to easily become attached in locking position and easily become released. As it may be suitable at certain embodiments from a security point of view to have the fittings more permanently present in locking position a groove 21 has been applied on the grip part of the fitting which groove serves as an introduction site for an optional locking screw. The invention is not restricted to the embodying examples given above but a number of modifications are possible within the scope of the accompanying claims. Thus the fitting need not be designed as described above. The essential thing is that there is a grip part and from this an extending locking part, which can be introduced into the track for locking the edge wire and which is provided with a hook which can be applied in locking position underneath a wall part surrounding the track opening. The edge wire 7, and 8, respectively, need not necessarily extend continously over the whole edge of the fence part but it is enough that there are a number of separated edge wires 7, and 8 respectively where the fittings can be attached. The netting fence need not necessarily have the design as described but may be varied. The fittings need not be designed in a polymeric material but can be designed in any other material such as aluminum. If one should choose aluminum one has to consider that this is a relatively rigid and the e.g., the stop neck 13 has to be designed resiliently e.g., in the form of a resilient iron sheet.

Claims: CLAIMS 1. Device at fence systems, comprising wire netting (1), moulding strips (2) having at least one longitudinally extending track (3) and fittings (9) for connecting wire netting and moulding strips, characterized in that the track (3) of the moulding strips has an opening (4) which is restricted by two longitudinally extending wall parts (5, 6) inside which the track expands, that the wire netting (1) has an outer edge part along which, at least partly, the outermost edge is a edge wire (8), that this at a joining to a moulding strip (2) is introduced through an opening (4) of the track (3) and is moved to the side inside a first (5) of said wall parts (5, 6), that the fittings (9) have a locking part (10) and a gripping part (11), that the locking part (10) projects from the gripping part (11) and is designed in such a way that it can be introduced through the opening (4) of the moulding strip in at least two opposite turning positions, that the locking part (10) at its free end has a hook (14) or the like projecting in one direction, which hook is arranged to extend in the longitudinal direction of the opening in said turning positions, that said hook (14) is arranged to, in at least one of said locking positions at the turning of the gripping part (11) into one locking direction, enter into locking engagement underneath the second wall part (6), whereby the locking part (10) fix the edge wire (8) inside the first wall part (5), and that the fitting (9) fixing the edge wire is releaseable by a returning turning. 2. Device according to claim 1, characterized in that the wire netting (1) is a square shaped netting having when being in upright position, horizontal and vertical wires (7) and (8), respectively, that all horizontal wires (7, and 8, resp.) Are situated on the sae side of all cross-running, vertical wires (7, and 8, resp.), that the outermost edge of a wire netting part, which is intended to be connected to a moulding strip is an edge wire (8), that this at a joining to a moulding strip (2) is introduced through an opening (4) of the track (3) and moved sidewise inside the first (5) of said wall parts (5, 6), whereby those wires (7) extending perpendicularly to the edge wire (8) abut the edge part of the opening (4) at said first wall part (5). 3. Device according to claim 1 or 2, characterized in that the gripping part (10) is oblong and that the locking part (9) extending from the gripping part is arranged close to one end of the gripping part, whereby a lever arm effect is obtained when turning the gripping part by influencing its opposite end. 4. Device according to claim 1, characterized in that the outside of the moulding strip (2) around the opening (4) of the track (3) is flat, that the surface (12) of the gripping part from which surface the locking part projects is flat and is intended to abut with its planar side (12) against to the planar outside of the moulding strip when the locking part is introduced into the track (3), that at least one fastening part (17) of the gripping part comprising a part of said flat surface extends sidewise in the same direction as the hook (14) outside the locking part, that the fastening part (17) and the hook (14) create a slot shaped space (18) for receiving one of the wall parts (5, 6) of the track (3) when the fitting is applied and has been turned into locking position, that the thickness of the wall parts (5, 6) and the slot shaped space (18) have so dimensioned that the wall part in the locking psoition of the fitting is clamped into said space. 5. Device according to claim 4, characterized in that the hook (14) projecting from the locking part (9) consists of two, in the direction of the slot and thereby the longitudinal direction of the fitting (9) coherent and of the same material designed parts, of which a first part (15) seen in a direction of the width of the slot is thick and at existing use forces is non-resilient, and the second part (16) is relatively thin and resiliently arranged to the wall part (5, 6) of the track when this is applied or has been applied into the slot shaped space (18) and whereby the slot is wider ringht in front of the thick first part (15) than right in front of the resilient second part (16), whereby a fastening of the wall parts will occur only by means of the resilient second part. 5 6. Device according to claim 4 or 5, characterized in that at the opposite end of the flat surface of the gripping part in relation to the position of the locking part (10) there is arranged a stop neck (13) projecting from the planar surface (12) which stop neck is intended to be brought into grip with at least an edge part of one of the 0 wall parts (5, 6) of the track for restricting the turning movement of the fitting when this is turned from an open position to a locked position. 7. Device according to any of the preceding claims, characterized in 15 that the fitting (9) is cast in one piece of polymeric material. 8. Device according to claim 7, characterized in that the locking part (10) between the hook (14) and the planar surface (12) has a 0 substantially cylindrical part the diameter of which is chosen to mainly fit the width of the opening (4) of the moulding strip, and that the cylindrical part right in front of the slot (18) has a radially projecting thin rib (19) which is intended to compensate for tolerance plays of the width of the opening (4) and of the diameter of the cylindrical part. 25 9. Device according to any of claims 3-8, characterized in that the oblong gripping part (11) of the fitting (9) has a depression (21) which intended to be a site of introduction for applying an optional locking screw. 30 10. Device according to any of the preceding claims, characterized in that the depth pf the track inside said wall parts (5, 6) and in the direction of wires (7) extending perpendicular to the edge wire (8) substantially exceeds the diameter of the edge wire whereby a tolerance play is achieved which facilitates the mounting of the fence system. 11. Device according to any of the preceding claims, characterized in that the locking part (9) right in fron of the hook (14) is provided with a projecting corner (20) which is arranged to prevent turning of the fitting (9) into a locking position in one of said turning positions in which the locking part can be introduced through the opening. 12. Device according to any of the preceding claims, characterized in that the moulding strips (2) consist of square mouldings and that these are symmetrical and each provided with four of said longitudinally extending tracks (3), one along each side.

Inventors: LINGER MATS, LINGER, MATS
Applicants: JOKAB SAFETY AB, LINGER MATS, LINGER, MATS
Application year: 2000
Main classification: E04H17
IPC codes: E04H17