BEDDING BOX FOR BUILDING STRUCTURES

Abstract: In the establishing of power take-off points in connection with cable installations in bricked and moulded walls, bedding boxes (2) are established to which are led the cable conduits through which the relevant cables are drawn. However, the securing of the bedding boxes (2) in recesses (4) in said walls can be problematic, namely if cables are led to these boxes before the boxes are firmly bedded in. In order to solve this problem, there is disclosed a bedding box (2) which is characterised by comprising mounting brackets (6, 8) which can be mounted on the box, and which have at least two legs which form right-angles to each other, where the first leg (10, 12) is designed for locking engagement with the sides (14, 16) of the bedding box, and where the second leg (18, 20), in the positioning of the bedding box (2), is designed for contact with the wall surface (26), so that the front edge (3) of the bedding box is flush with the front (26) of the wall surface, and where the second leg (18, 20) has at least one hole (30) for the accommodation of a securing means (28).

Description: Bedding box for building structures The present invention concerns bedding boxes of the kind which are used for building into a surface by being bedded into a recess, mainly in wall surfaces of building struc- tures, and namely in connection with power supply and low- current installations. Where mention is made here of bedding boxes, this is to be understood in a broad sense, i.e. these can involve both the traditionally-known bedding boxes for installation in re- cesses in brick-built, moulded or prefabricated wall elements which form part of wall constructions in buildings, and also bedding boxes for use in the establishing of power take-off points in normal service installations or low-current installations, e.g. for EDP networks, and antenna outlets. In the establishing of bedding boxes in bricked or prefabricated walls, a recess is established in which the bedding box must be placed. As a rule, said recess is made sufficiently large to enable the bedding box to be accommodated securely within the confines of the recess. Hereafter, the bedding box is placed in the recess and is screwed/wedged firmly in the vertical/horizontal position in the opening, and such that it is endeavoured to ensure that the box is retained in the middle of the recess, in that there must be room for the application of a binding agent, e.g. in the form of mortar, around the whole periphery of the box, so that the box sits in the correct position after application of the mortar. Precisely this work involved in the screwing/wedging firmly of the box can be very time-consuming, the reason being that the recesses are not normally of the same size. This situation also has the result that it is necessary for the electricians to wait until the mortar around the boxes has set, in that the boxes must be sitting firmly before it is possible to draw the cables, since this work would otherwise push the boxes out of their positions. Consequently, this situation gives rise to a considerable need for co-ordination of the efforts e.g. on a building site, where electrical installations and the like are to be established, and there will also be a need for the respective craftsmen to be transported to and from the building site several times in order to effect the various stages of the work. It is the object of the invention to provide a bedding box of the kind disclosed with which the above-mentioned problems are solved. This object is achieved with a bedding box of the kind disclosed, with the characteristic feature as disclosed in claim 1. There is hereby achieved a bedding box whereby the bedding box can be retained in the correct mounting position in the recess in the surface in which the box is placed, in that the longest leg extends over the slot between the side wall of the bedding box and the side confines of the recess, and in over the wall surface where it is secured. The securing can be effected with securing means which can either be adhered firmly to the side surfaces and wall surface respectively of the bedding box, alternatively the securing of the second leg to the wall surface can be effected with a fixing agent intended for driving into the wall surface. There is hereby achieved the great advantage that cables can be mounted in the bedding box according to the invention without this necessarily having to be walled into/moulded into the wall surface, in that the mounting bracket secures the box in its correct position during the execution of this work. After the bedding-in and setting of the mortar or the moulding-in mass, the longest leg is broken off the mounting bracket and the installation is finished. The mounting bracket thus comes to serve as a temporary fixture which secures the bedding box in the correct position in a sufficiently firm manner, with the front edge flush with the wall surface, during and after the mounting of cables etc. in the box. As a rule, such bedding boxes are provided with assembly links which enable a number of bedding boxes to be installed assembled in one unit in a wall surface. Said assembly links are as a rule configured as co-operating, non-circular cross- sections, and with especially preferred embodiments of the mounting brackets as disclosed and characterised in the claims 2-5, it is disclosed how the first leg on the mounting brackets for the bedding boxes can with advantage be configured so that with easy manipulation they can be mounted in the correct position on the bedding boxes' assembly links by use of these along the periphery of a bedding box or a plurality of such boxes. With the object of easing the breaking-off of the second leg after the bedding-in mortar has set, the mounting bracket can with advantage be provided with a weakening as disclosed in claim 7. With the object of having a bedding box according to the invention as an assembly set, the mounting brackets can be disposed in the bedding box as disclosed in claim 8. With the object of being able to use the mounting brackets in connection with bedding boxes which are not delivered with the mounting brackets, these can be configured as dis- closed in the claims 9-15. In the following, the invention is explained in more detail with reference to the drawing, where fig. 1 is a perspective view of a bedding box according to the invention built into a wall, fig. 2 is a front view of fig. 1, fig. 3 is a view of the bedding box seen in section along the line A-A in fig. 2, fig. 4 is a perspective view of a first embodiment of a mounting bracket according to the invention, fig. 5 is a cross-sectional view along the line B-B in fig. 4, fig. β is a perspective view of a second embodiment of a mounting bracket according to the invention, fig. 7 is a cross-sectional view along the line C-C in fig. 6, fig. 8 shows a bedding box and mounting bracket according to the invention, and fig. 9 shows the same as in fig. 8, but where the mount- ing brackets are mounted on the sides of the bedding box. In fig. 1 and fig. 2 there is shown a bedding box 2 according to the invention in the form of a bedding box placed in a recess 4 in a wall construction 5. The bedding box 2 is secured in the correct position in the opening in the recess 4 by means of mounting brackets 6, 8, the first shorter legs 10, 12 of which are fastened to the vertical sides 14, 16 of the box, and the second longer legs 18, 20 of which are extending transversely across the slots between the edge 22 of the box and the confines 24 of the recess, and in over the wall surface 26, where these are secured in the wall construction 5 by fastening means 28, for example nails, which through holes 30 (cf. fig. 4 and fig. 6) arranged for this purpose in the second longer legs 18, 20, are driven into the wall . The bedding box 2 is a standard bedding box which on the external periphery 22 comprises assembly links in the form of undercut projections 32 and undercut grooves 34, which are used for the securing of the respective boxes in connection with the establishing of a modular build-up of a number of bedding boxes 2, where the projections 32 in the one side wall 14 are brought into sliding engagement with the undercut grooves 34 in a corresponding side wall 16 in the neighbouring box. Undercut projections 32 and undercut grooves 34 re- spectively will thus always exist along the periphery of a bedding box 2 or a modular build-up of such boxes. As will be seen from figs. 4, 5, 6 and 7, nearest the free ends of the first short legs 10, 12, the mounting brack- ets 6, 8 comprise a projecting part respectively comprising an undercut projection 36 and an undercut groove 38 which are configured in such a manner that they can be inserted in locking engagement with the assembly links which consist of the above-mentioned undercut projections 32 and undercut grooves 34. In figs. 8 and 9 it is shown how the respective mounting brackets 6, 8 are inserted into engagement, so that an undercut projection 36 on the first shorter leg 10 is inserted in an undercut groove 34 in the side of the bedding box, and so that the undercut groove 38 on the shorter first leg 12 is slid in over the undercut projection 32 on the side of the bedding box 2, after which the bedding box 2, now provided with the mounting brackets 6, 8, is now ready for insertion in a recess 4 and fastening in the correct position by means of securing means driven into the wall surface 26, said securing means being led through holes 30 provided for this purpose in the longer legs 18, 20. It should also be noted that the mounting brackets 6, 8 can also be mounted on the bottom and top of the bedding box, where undercut grooves 34 and undercut projections 32 are provided respectively. As will also appear from figs. 3, 4 and 6, near the longer legs 18, 20, the first shorter legs 10, 12 on the mounting brackets 6, 8 are provided with a V-shaped notch 40 which serves to facilitate the breaking-off of the longer legs 18, 20, in that these are superfluous after the bedding box 2 has been walled firmly into the recess 4 by filling out with mortar or similar jointing material in the slot 42 between the sides of the bedding box 2 and the confines 24 of the recess. There is hereby provided a bedding box of the type disclosed which allows the building-in of cables and cable conduits to and from the box before the bedding-in is effected, in that the bedding box is provided with mounting brackets 6, 8 which can be fastened on the sides and the ends of the box, and which facilitate or almost obviate difficult coordination between electricians, bricklayers and carpenters on a construction site, in connection with the establishing of power take-off points and cable installations. It shall be mentioned that the mounting brackets can with advantage be made of a breakable plastic material, and that the undercut grooves and projections can assume many shapes other than described in the above, and in the configuration shown in the drawing, which indicates a bedding box of the "FUGA" type. It will thus be obvious that the undercut projections 36 and the undercut grooves 38 on the shorter legs 10, 12 of the mounting brackets can assume shapes which correspond to the geometry of the assembly links on all types of bedding boxes, also including e.g. of the "OPUS66" type. It shall also be mentioned that the mounting brackets 6, 8 can also be delivered as independent units for use together with already-delivered bedding boxes, and also that the securing means between the sides of the box and the first shorter leg do not necessarily need to consist of co- operating undercut grooves and projections corresponding to and co-operating with corresponding parts on a bedding box. Here, for example, use could be made of a strong adhesive or cementing powder, and use could also be envisaged of a securing means between the wall surface 26 and the sides of the longer legs 18, 20 of the mounting brackets 6, 8 which face in towards this surface. The inventive aspect thus consists partly in the realisation of making use of the geometry of a bedding box, including the geometry of assembly links, in the establishing of herewith co-operating mounting brackets 6, 8 for establishing an effective fastening of bedding boxes 2 which are not bedded firmly into a wall construction, and surprisingly in that an assembly bracket configured with a second longer leg 18, 20 for securing to/in a wall surface will be sufficient to establish the necessary fastening of a bedding box in a recess in a wall surface.

Claims: C L A I M S 1. Bedding box (2) of the kind which is used for build- ing-into a surface (26) , especially in wall surfaces of a building structure, and namely in connection with power supply and/or low-current installations, c h a r a c t er i s e d in that it comprises mounting brackets (6, 8) which can be mounted on the box, and which have at least two legs which in the condition of use substantially form right- angles to each other, where the first leg (10, 12) is designed for locking engagement on the sides (14, 16) of the bedding box, and where the second leg (18, 20), in the positioning of the bedding box (2), is intended for abutment with that surface (26) of the wall (5) in which the bedding box is to be built, preferably so that the front edge (3) of the bedding box lies flush with the front side (26) of the wall surface, and where the second leg (18, 20) comprises means for fastening to the surface, or at least a hole (30) for the accommodation of a securing means (28). 2. Bedding box (2) according to claim 1, c h a r a c t er i s e d in that the second leg (18, 20) is substantially longer than the first leg (10, 12), and that the mounting bracket (6, 8) is made of a breakable material, so that it is breakable at least at the transition between the first and the second leg. 3. Bedding box (2) according to claim 1 or 2, c h ar a c t e r i s e d in that the first leg (10, 12) of the mounting bracket comprises locking means (36, 38) which cooperate with the bedding box (2) for the locking engagement of the mounting bracket (6, 8) on the sides of the bedding box. 4. Bedding box (2) according to claim 3, c h a r a ct e r i s e d in that the locking means consist of undercut grooves (34, 38) and projections (32, 36) on the first leg (10, 12) and the sides of the bedding box. 5. Bedding box (2) according to claim 4, c h a r a ct e r i s e d in that the undercut grooves and projections have a non-circular cross-section. 6. Bedding box (2) according to claim 4, c h a r a c- t e r i s e d in that the undercut grooves (34, 38) and projections (32, 36) are dovetailed. 7. Bedding box (2) according to any of the claims 1-6, c h a r a c t e r i s e d in that near the transition between the first (10, 12) and the second leg (18, 20), the mounting bracket (6, 8) comprises a weakening (40) of the breakable material transversely in relation to the longitudinal axis of the first leg. 8. Bedding box according to any of the claims 1-7, c h a r a c t e r i s e d in that this comprises a removable dividing wall inserted in its cavity, behind which the mounting brackets (6, 8) are placed in the not-mounted state. 9. Mounting bracket (6, 8) for bedding boxes (2) of the kind which are used for building into a surface (26) , especially in wall surfaces (5) of a building structure, and namely in connection with power supply and/or low-current installations, c h a r a c t e r i s e d in that it comprises two legs (10, 12, 18, 20) substantially at right-angles to each other, where the first leg (10, 12) is designed for locking engagement with the sides (14, 16) of the bedding box, and where the second leg (18, 20), in the positioning of the bedding box (2) , is designed for contact with that surface (26) in which the bedding box is to be built, preferably so that the front edge (3) of the bedding box is flush with the front (26) of the surface, and where the second leg (18, 20) com- prises means for fastening to the surface, or at least a hole (30) for the accommodation of a securing means (28) which is driven into the wall (5) . 10. Mounting bracket (6, 8) according to claim 9, c h a r a c t e r i s e d in that the second leg (18, 20) is substantially longer than the first leg (10, 12), and that the mounting bracket is made of a breakable material, so that it is breakable at least at the transition between the first and the second leg. 11. Mounting bracket (6, 8) according to claim 9 or 10, c h a r a c t e r i s e d in that the first leg has locking means (36, 38) which co-operate with assembly links (32, 34) on the sides of the bedding box for securing the mounting bracket (6, 8) to the sides of the bedding box. 12. Mounting bracket (6, 8) according to claim 11, c h a r a c t e r i s e d in that the locking means consist of co-operating, undercut grooves (34, 38) and projections (32, 36) on the first leg (10, 12) and the sides of the bedding box. 13. Mounting bracket (6, 8) according to claim 11 or 12, c h a r a c t e r i s e d in that the undercut grooves (34, 38) and projections (32, 36) have a non-circular cross- section. 14. Mounting bracket (6, 8) according to claim 11 or 12, c h a r a c t e r i s e d in that the undercut grooves (34, 38) and projections (32, 36) are dovetailed. 15. Mounting bracket (6, 8) according to any of the claims 9-14, c h a r a c t e r i s e d in that near the transition between the first (10, 12) and the second leg (18, 20), it comprises a weakening (40) of the breakable material transversely in relation to the longitudinal axis of the first leg.

Inventors: NIELSEN OLE, SIMONSEN KENT H, NIELSEN, OLE, SIMONSEN, KENT, H.
Applicants: NIELSEN OLE, SIMONSEN KENT H, NIELSEN, OLE, SIMONSEN, KENT, H.
Application year: 2000
Main classification: H02G3
IPC codes: H02G3