A METHOD FOR JOINING WALLBOARDS TOGETHER AND A NOVEL WALL ELEMENT

Abstract: The invention relates to a wall element comprising a wall panel with its first side edge (10) bent into an L-section and the second side edge (11) bent into a Z-section. The bent sections are provided with holes (12, 12') at specific intervals from each other along the height of the wall panel. When two panels (L1, L2) are placed side by side so that the L-section of the second panel (L2) touches the Z-section of the first panel (L1), then the holes (12, 12') come opposite one another. A U-shaped tongue strip (20) is fitted against the L-section of the panel, the strip being provided with tongues (22) shaped and dimensioned so that the tongues go through the holes (12, 12') of the side edges of both adjacent panels. A U-shaped wedge strip (30) is temporarily fitted against the Z-section of the panel, the strip being provided with holes (32) shaped and dimensioned so that the tongues (22) go through the holes (32). The panels attach to each other when the wedge strip (30) is knocked downwards.

Description: A Method for Joining Wallboards Together and a Novel Wall Element. The invention relates to a method for attaching wall panels to each other and a new wall element. According to a known method partition panels or wall elements, particularly in the installation of so-called cassettes used in shipbuilding, are attached to each other only at the floor and at the ceiling where the points of attachment can be protected with covering strips. The panels are not at all attached to each other in the middle because it would require separate protective strips to cover the points of attachment. The problem with this method of attachment is that gaps readily appear between the elements in the middle. Another problem is poor alignment of the elements which may lead to an uneven wall surface. Various attachment mechanisms have also been suggested whereby the wall panels or elements can be attached to each other also in the middle or in practice over the entire height of the wall. These kinds of systems are often composed of various profiled strips which are, for example, placed against the edge of the panel or the element and are screwed fast at specific intervals. Therefore, attachment of these known profiled strips is in practice rather tedious . The purpose of this invention is to eliminate the above problem and obtain a new method for attaching wall panels without the above drawbacks . The purpose of the invention is also to obtain a wall element comprising all tools needed in the attachment, the element being, according to the method, attachable to other similar elements. The characteristic features of the invention appear in claims 1 and 2 . By means of the invention wall panels can be firmly attached and accurately aligned with each other over the whole length of the panel. Installation is rapid because no screwing or the like is needed to be performed on the building site. The strips employed in the method have a simple structure and their manufacturing cost is low. The invention will be described in the following referring to the enclosed drawings in which Fig. 1 shows wall panels attached to each other as a perspective view partly cross-sectioned, Figs. 2A and 2B show the perforation of the edge sections of the wall panel, Fig. 3 shows the structure of a tongue strip, Fig. 4 shows the structure of a wedge strip, Fig. 5 shows wall panels fitted adjacently seen from above, Fig. 6 shows a cross-section of a joint along the line A-A of Fig. 5 before knocking down the wedge strip, Fig. 7 shows the joint of Fig. 6 after knocking down the wedge strip, Fig. 8 shows the structure of a wall element of wall panels placed against each other. Figures 1 and 5 show the attachment of adjacent wall panels LI and L2 to each other. The first side edge 10 of the panel LI is bent into an L-section and the second side edge 11 is bent into a Z-section. The bent L- and Z- sections are provided with holes 12 respectively 12' at a suitable interval from each other over the height of the wall panel in the manner shown in Figs. 2A and 2B. The edges of the second panel L2 are bent in the same way. The L- and Z-sections of the panel L2 are also provided with holes 12 respectively 12' disposed in the same way as those of the panel LI over the height of the wall panel. Thus the holes 12, 12' of the edge sections of both panels come opposite one another when the panel LI is placed adjacent to the panel L2. The L-section of the second panel L2 is placed against the Z-section of the first panel LI according to Figs . 1 and 5. The perforated part 15 of the L-section of the second panel presses against the similarly perforated part 16 of the Z-section of the first panel. A tongue strip 20 with a U-profile, the structure of which appears in more detail in Fig. 3, is attached against the L-section of the panels by gluing or riveting, for example. The middle part 21 of the U- section of the tongue strip 20 is provided with upward pointing tongues 22 over the height of the strip. The tongues 22 are dimensioned and fitted so that the tongues go through both holes 12, 12' of the edge sections 15, 16 of the panels LI and L2 placed side by side. A wedge strip 30 with a U-profile, the structure of which appears in more detail in Fig. 4, is placed against the Z-section of the panel LI. The middle part 31 of the U-shaped section of the wedge strip is provided with holes 32 over the height of the strip which are shaped and dimensioned so that the tongues 22 go through the holes 32 when the wedge strip is placed against the Z-section. The panels LI and L2 are attached to each other by knocking the wedge strip 30 downwards whereupon the upper edges 33 of the holes 32 go into the pockets 23 formed by the tongues 22, preferably up to the bottom of the pockets. The location of the holes 32 of the wedge strip must, of course, be such that the strip can be knocked down in this way. Viewing from above, perforation of the wedge strip starts so that the upper edge 33 of the first hole is at the same height as the bottom of the pocket 23 of the first tongue. By means of the wedge strip the panels can be attached to each other and aligned correctly in place. Naturally, the tongue strip can be attached to the L- section of the panel on the building site but assembly is quickened if the strip is pre-attached to the L-section of the panel already in the factory. To obtain a joint between the panels which is as tight as possible, the tongue strip must be firmly attached to the L-section. Naturally, the wedge strip cannot be permanently fixed to the Z-section of the panel in the factory because assembly requires that the strip can be moved in the vertical direction. However, it is preferable if the wedge strip is temporarily attached against the Z-section by light gluing or by other means . It must be attached to the edge section 16 of the panel so that the tongues 22 go through its holes 32 when two panels are placed side by side. According to an advantageous solution, the wedge strip is temporarily fixed to the edge section 16 so that it extends a tongue-length above the panel itself . When knocked down its upper edge will be at the same height as the panel . The upper edge of the wedge strip 30 is suitably provided with holes 34 into which a locking member can be fitted. When the wall is being disassembled, a suitable tool can be fitted into the holes 34 to lift the strip up whereupon the panels release from each other. According to an advantageous embodiment, the holes 32 of the wedge strip narrow upwards as shown in Fig. 4. In this way a better attachment is obtained. The tongue strip 20 is suitably fabricated so that the tongues 22 are punched out of the middle part 21 of the U-section and are bent in a desired fashion. Fig. 6 shows the location of the wedge strip when it is temporarily fixed to the part 16 of the Z-section. By forcing the strip downwards in the direction of the arrow, one obtains the locking shown in Fig. 7. The attachment method described above is particularly suitable for the assembly of metal-plate partition walls used in shipbuilding. Insulation can be fitted inside the plates. The plates can be placed against each other in the way shown in Fig. 8 to make up a double thickness. Adjacent tongue strips and adjacent wedge strips are coupled to each other so that the wall structure is compact also in the direction of width. The U-sections of the tongue strip and the wedge strip are shaped so that there is enough space for the outermost flanges of the Z- sections of the panels. It is obvious to a specialist in the field that the different embodiments may vary within the limits of the enclosed claims.

Claims: Claims 1. Method for attaching wall panels (LI, L2) to each other wherein the panels are placed side by side characterized in that - the first side edge (10) of the panels (LI, L2 ) is bent into an L-section and the second side edge (11) thereof is bent into a Z-section, the bent L- and Z-sections being provided with holes (12, 12') at specific intervals from each other over the height of the wall panel so that the holes of the edge sections of both panels come opposite one another when the panels are placed side by side by fitting the L-section of the second panel (L2) against the Z-section of the first panel (LI), and - a U-shaped tongue strip (20) is fitted against the L- section of the second panel (L2), the middle part (21) of the U-shaped section being provided with upward tongues (22) over the height of the strip, the tongues being shaped and dimensioned so that they go through both holes (12, 12'), placed against one another, of the side edges of the panels, and - a U-shaped wedge strip (30) is fitted against the Z- section of the first panel (LI), the middle part (31) of the U-shaped section being provided with holes (32) over the height of the strip, the holes being shaped and dimensioned so that the tongues go through the holes (32) when the strip is placed against said Z-section, and - the wedge strip (30) is knocked downwards so that the upper edges (33) of the holes (32) in the strip go into the pockets (23) formed by the tongues (22) whereupon the panels attach to each other. 2. Wall element comprising a wall panel (LI) and strips (20, 30) for attaching it to another similar panel (L2) characterized in that - the first side edge (10) of the panel (LI) is bent into an L-section and the second side edge (11) thereof is bent into a Z-section, the bent L- and Z-sections being provided with holes (12, 12') at specific intervals from each other over the height of the wall panel so that the holes of the edge sections of both panels (LI, L2 ) come opposite one another when the panel (LI) is placed side by side the second panel (L2) by fitting the L-section of the second panel (L2) against the Z-section of the first panel (LI), and that - a U-shaped tongue strip (20) is attached against the L- section of the panel (LI), the middle part (21) of the U- shaped section being provided with upward tongues (22) over the height of the strip, the tongues being shaped and dimensioned so that they go through both holes (12, 12'), placed against one another, of the side edges of the adjacent panels (LI, L2), and that - a U-shaped wedge strip (30) is temporarily attached against the Z-section of the panel (LI), the middle part (31) of the U-shaped section being provided with holes (32) along the height of the strip, the holes being shaped and dimensioned so that the tongues (22) go through the holes (32) and the upper edges (33) of the holes (32) in the strip go into the pockets (23) formed by the tongues (22) when the wedge strip (30) is knocked downwards whereupon the panels (LI, L2 ) attach to each other. 3. Wall element according to claim 2 characterized in that the wedge strip (30) is attached to the edge section of the panel so that the wedge strip extends a tongue- length higher than the panel itself . 4. Wall element according to claim 2 or 3 characterized in that the upper edge of the wedge strip (30) is provided with holes (34) whereby the strip (30) can be locked or released. 5. Wall element according to claim 2, 3 or 4 characterized in that the holes (32) of the wedge strip (30) narrow upwards. 6. Wall element according to any of the claims 2 - 5 characterized in that the tongues (22) are strips punched out of the middle part of the U-shaped section (21) and bent in a desired fashion. 7. Wall element according to any of the claims 2 - 6 characterized in that a suitable insulating material is fitted inside the panel.

Inventors: KORDELIN TAPIO, KORDELIN, TAPIO
Applicants: KORDELIN TAPIO, SHIPPAX LTD OY, KORDELIN, TAPIO, OY SHIPPAX LTD.
Application year: 1995
Main classification: E04B1
IPC codes: E04B1, E04B2