Building panels

Abstract

Flooring material comprising sheet-shaped floor elements with a mainly square or rectangular shape. The floor elements are provided with edges, a lower side and an upper decorative layer. The floor elements are intended to be joined by means of joining members. The floor elements are provided with male joining members on a first edge while a second edge of the floor elements are provided with a female joining member. The male joining member is provided with a tongue and a lower side groove while the female joining member is provided with a groove and a cheek. the cheek being provided with a lip. The floor elements are provided with a male vertical assembly joining member on a third edge while a fourth, opposite. edge is provided with female vertical assembly joining member.

Claims

1. A surface element designed to be assembled together with similar surface elements to form a plurality of joined surface elements: the surface element being a floor panel comprising a decorative upper surface, an opposed lower surface and at least four edges disposed between the upper and lower surfaces; the four edges comprising a first edge and a second edge defining a first pair of opposite sides, and a third edge and a fourth edge defining a second pair of opposite sides; the four edges including upper edge portions, towards which the surface elements seen from the top visually extend in joined condition; wherein the first edge of the surface element comprises a first male joining member and the second edge comprises a first female joining member; the first male joining member comprising a tongue and the first female joining member comprising a groove which is bordered by an upper lip and a lower lip, said lower lip forming a lower cheek extending in distal direction further than said upper lip; said lower cheek having an upwardly directed lip; said tongue having a lower side protrusion, said protrusion having a lowermost portion; said lowermost portion being located proximally from a vertical plane through the upper edge portion belonging to said first edge; a lower side groove located at said first edge; the first male joining member and the first female joining member being configured such that two of such surface elements can be coupled and locked at their respective first and second edges, wherein said locking provides a vertical locking as well as a horizontal locking; the vertical locking being realized in that the tongue fits in the groove that is bordered by the upper lip and the lower lip; the horizontal locking being realized in that said upwardly directed lip at said lower cheek cooperates with said lower side groove; wherein the third edge of the surface element comprises a second male joining member and the fourth edge comprises a second female joining member; said second male joining member and second female joining member of the surface element being configured such that two of such surface elements at their respective third edge and fourth edge can be engaged by a downward motion of the third edge of one of said two surface elements with respect to the fourth edge of the other of said two surface elements; said second male joining member being formed as an upper cheek protruding at said third edge and provided with a downward directed portion; said second female joining member being formed as a lower cheek protruding at said fourth edge and provided with an upward directed portion; said second male joining member comprising a male cheek surface at a lower side of said upper cheek and said second female joining member comprising a female cheek surface at an upper side of said lower cheek, the male and female cheek surfaces being arranged to interact with one another so that two joined adjacent surface elements become locked to each other in a horizontal direction; said third and fourth edges each comprising one or more locking surfaces for locking the third edge and a fourth edge of two of such coupled surface elements against vertical separation; and each of said locking surfaces of the fourth edge being located distally from a vertical plane through the upper edge portion belonging to the fourth edge.

2. The surface element of claim 1, wherein said lower cheek of the second edge is formed in one piece of a core material of the surface element.

3. The surface element of claim 1, wherein said lower cheek of the fourth edge is formed in one piece of a core material of the surface element.

4. The surface element of claim 1, wherein each of said joining members are formed in one piece of a core material of the surface element.

5. The surface element of claim 1, wherein said lower side protrusion is round.

6. The surface element of claim 5, wherein said lower side protrusion is formed as a substantially circle-shaped segment.

7. The surface element of claim 5, wherein said round protrusion substantially extends from the tip of the tongue up to a position that is located proximally from said lowermost portion.

8. The surface element of claim 1, wherein said lower side groove is located proximally adjacent of said lower side protrusion.

9. The surface element of claim 8, wherein said lower side protrusion has a proximally facing side, said proximally facing side defining a sidewall of said lower side groove.

10. The surface element of claim 9, wherein said lower side protrusion is formed as a substantially circle-shaped segment and said proximally facing sidewall forms part of the circle-shaped form.

11. The surface element of claim 1, wherein said tongue has an upper surface which extends upwards from a distal location to a more proximal location.

12. The surface element of claim 1, wherein said female cheek surface is inclined with respect to the plane of the surface element.

13. The surface element of claim 1, wherein the first and second edges are configured such that said tongue and groove provide a positive vertical locking, said tongue thereto extending with a distal length underneath the upper lip, said length being such that joining of the tongue and groove by means of only a plane parallel vertical lowering of one surface element in respect to the other is made impossible and as such an explicit lateral insertion of the tongue into the groove is required for joining.

14. The surface element of claim 13, wherein the first and second edges are configured such that for said lateral insertion an inclined lateral insertion is needed for bringing the tongue into the groove.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is described further in connection to enclosed figures showing different embodiments of a flooring material whereby,

(2) FIG. 1 shows, in cross-section, a first and a second edge 2.sup.I and 2.sup.II respectively, during joining

(3) FIG. 2 shows, in cross-section, a second embodiment of a first and a second edge 2.sup.I and 2.sup.II respectively, during joining.

(4) FIG. 3 shows, in cross-section, a third embodiment of a first and a second edge 2.sup.I and 2.sup.II respectively, during joining.

(5) FIG. 4 shows, in cross-section, a fourth embodiment of a first and a second edge 2.sup.I and 2.sup.II respectively, during joining.

(6) FIG. 5 shows, in cross-section, a third and a fourth edge 2.sup.I and 2.sup.IV respectively, during joining.

(7) FIG. 6 shows, in cross-section, a second embodiment of a third and a fourth edge 2.sup.III and 2.sup.IV respectively, during joining.

(8) FIG. 7 shows, in cross-section, a third embodiment of a third and a fourth edge 2.sup.III and 2.sup.IV respectively, during joining.

(9) FIG. 8 shows, in cross-section, a fourth embodiment of a third and a fourth edge 2.sup.III and 2.sup.IV respectively and a vertical assembly joining profile 30, during joining.

(10) FIG. 9 shows, in cross-section, a first and a second edge 2.sup.I and 2.sup.II respectively, during joining.

(11) FIG. 10 shows, in cross-section, a second embodiment of a first and a second edge 2.sup.I and 2.sup.II respectively, during joining.

(12) FIG. 11 shows, in cross-section, a third embodiment of a first and a second edge 2.sup.I and 2.sup.II respectively, during joining.

(13) FIG. 12 shows, in cross-section, a fourth embodiment of a first and a second edge 2.sup.I and 2.sup.II respectively, during joining.

(14) FIG. 13 shows, in cross-section, a third and a fourth edge 2.sup.III and 2.sup.IV respectively, during joining.

(15) FIG. 14 shows, in cross-section, a second embodiment of a third and a fourth edge 2.sup.III and 2.sup.IV respectively, during joining.

(16) FIG. 15 shows, in cross-section, a third embodiment of a third and a fourth edge 2.sup.III and 2.sup.IV respectively, during joining.

(17) FIG. 16 shows, in cross-section, a fourth embodiment of a third and a fourth edge 2.sup.III and 2.sup.IV respectively and a vertical assembly joining profile 30, during joining.

DETAILED DESCRIPTION OF THE INVENTION

(18) FIG. 1 shows, in cross-section, a first and a second edge 2.sup.I and 2.sup.II respectively, during assembly. The figure shows pans of a flooring material comprising sheet-shaped floor elements 1 with a mainly square or rectangular shape. The floor elements 1 are provided with edges 2, a lower side 5 and an upper decorative layer 3. The floor elements 1 are intended to be joined by means of joining members 10. Such floors floor elements, for example, be constituted of solid wood, fibre board, such as medium density fibre board (MDF), particle board, chip board, or any other construction comprising pieces or particles of wood, including combinations of plastic elements and the particles or pieces of wood. The floor elements 1 are provided with male joining members 101 on a first edge 2.sup.I while a second edge 2.sup.II of the floor elements 1 are provided with a female joining member 10.sup.II. The second edge 2.sup.II is arranged on a side opposite to the first edge 2.sup.I. The male joining member 10.sup.I is provided with a tongue 11 and a lower side 5 groove 12. The female joining member 10.sup.II is provided with a groove 13 and a cheek 14, the cheek 14 being provided with a lip 15. The floor elements 1 are intended to mainly be joined together by tilting the floor element 1 to be joined with an already installed floor element 1 or a row of already installed floor elements 1, with the male joining member 10.sup.I of the floor element 1 angled downwards and that the first edge 21 is allowed to be mainly parallel to the second edge 2.sup.II of the already installed floor element 1 or elements 1. The tongue 11 of the tilted floor element 1 is then inserted into the groove 13 of the female joining member 10.sup.II of the already installed floor element 1 or elements 1, whereby the tilted floor element 1 is turned downwards, with its lower edge as a pivot axis, so that the lip 15 eventually falls into the lower side 5 groove 12 where the decorative upper layer 3 of the floor elements 1 are mainly parallel.

(19) The embodiment shown in FIG. 1 corresponds mainly with the one shown in FIG. 1. The lip 15 and lower side 5 groove 12 are, however, provided with a cam 16 and a cam groove 17 which provides a snap action locking.

(20) The embodiment shown in FIG. 3 corresponds mainly with the one shown in FIGS. 1 and 2 above. The lip 15 and lower side 5 groove 12 are, however, provided with a cam 16 and a cam groove 17 which provides a snap action locking.

(21) The embodiment shown in FIG. 4 corresponds mainly with the one shown in FIG. 1 above. The lip 15 and cheek 14 is however shaped as a thin resilient section which provides a snap action locking.

(22) FIG. 5 shows, in cross-section, a third and a fourth edge 2.sup.II and 2.sup.IV respectively, of a floor element 1 according to any of the FIGS. 1 to 4. The floor elements 1 are provided with a male vertical assembly joining member 10.sup.III on a third edge 2.sup.III while a fourth edge 2.sup.IV is provided with a female vertical assembly joining member 10.sup.IV. The fourth edge 2.sup.IV is placed on a side opposite to the third edge 2.sup.III. The male vertical assembly joining members 10.sup.III are provided with mainly vertical lower cheek surfaces 21 arranged parallel to the closest edge 2. The lower cheek surfaces 21 are intended to interact with mainly vertical upper cheek surfaces 22 arranged on the female vertical assembly joining members 10.sup.IV so that two joined adjacent floor elements 1 are locked against each other in a horizontal direction. The male vertical assembly joining members 10.sup.III are moreover provided with two snapping hooks 23 while the female vertical assembly joining members 10.sup.IV are provided with matching under cuts 24, which by being provided with mainly horizontal locking surfaces limits the vertical movement between two joined adjacent floor elements 1.

(23) The joint between a third and a fourth edge 2.sup.III and 2.sup.IV respectively of two joined floor elements 1 further comprises contact surfaces which are constituted by the horizontal locking surfaces of the under cuts 24 and hooks 23, the mainly vertical upper cheek surfaces 22 lower cheek surfaces as well as upper mating surfaces 25. The joint between two joined floor elements 1 also comprises cavities 6.

(24) The embodiment shown in FIG. 6 corresponds in the main with the one shown in FIG. 5. The male vertical assembly joining members 10 are, however, provided with only one snapping hook 23 while the female vertical assembly joining members 10.sup.IV are provided with a matching undercut 24, which by being provided with mainly horizontal locking surfaces limits vertical movement between to joined adjacent floor boards 1.

(25) The embodiment shown in FIG. 7 corresponds in the main with the one shown in FIG. 6. The snapping hook 23 on the male vertical assembly joining member 10.sup.III is, however, moved somewhat inwards in the floor element 1 whereby a guiding angle is formed above the undercut 24 of the female vertical joining member 10.sup.IV.

(26) The embodiment shown in FIG. 8 corresponds mainly with the one shown in FIG. 7. Both the third and the fourth edges 2.sup.III and 2.sup.IV respectively are, however, provided with male vertical assembly joining members 10.sup.III. A vertical assembly joining profile 30, provided with a female vertical assembly joining profile 10.sup.IV on both sides of a vertical symmetry line, is used for joining the two floor elements 1. The female vertical assembly joining members 10.sup.IV of the vertical assembly joining profile 30 are equipped similar to the female vertical assembly joining members 10.sup.IV in FIG. 7 above.

(27) Two adjacent edges 2 of a floor element 1 can at the same time, and in the same turning motion, be joined with a floor element 1 adjacent to the first edge 21 and a floor element 1 adjacent to the third or fourth edge 2.sup.III and 2.sup.IV respectively, when assembling floor elements 1 according to the above described embodiments.

(28) The floor elements 1 according to the present invention most often comprises a core. The core is most often comprised of particles or fibre of wood bonded with resin or glue. It is advantageous to coat the surface closest to the joint in cases where the floor will be exposed to high levels of moisture since the cellulose based material is sensitive to moisture. This coating may suitably incorporate resin. wax or some kind of lacquer. It is not necessary to coal the joint when it is to be glued since the glue itself will protect from moisture penetration. The upper decorative layer 3 is constituted of a decorative paper impregnated with melamine-formaldehyde resin. One or more so called overlay sheets of a-cellulose, impregnated with melamineformaldehyde resin may possibly be placed on top of the decorative layer. The abrasion resistance may be improved by sprinkling one or more of the sheets with hard panicles of for example -aluminium oxide, silicon carbide or silicon oxide. The lower side 5 may suitably be coated with lacquer or a layer of paper and resin.

(29) FIGS. 9-16 demonstrate the improvement of the radially projected dimension of the length (L) of the groove or undercut and the horizontal rotated radially projected height (L) of the lip or upper cheek surface of the boards of the invention. With respect to FIGS. 9-12, the radially projected dimension, indicated at , corresponds to the length of the groove 13, while indicates the horizontal rotated length of lip 15. Additionally, indicates the length of the tongue 11, while is the horizontal rotated length of the locking groove 12. Because is greater than , and is greater than , adjacent floor elements cannot be assembled horizontally. In other words, because tongue 11 (as well as groove 13) is greater than lip 15 (as well as locking groove 12), the floor elements depicted in these figures can only be assembled by rotating or turning one of the floor elements. Generally, in each of these figures, is substantially equal to and is substantially equal to . This substantially equal relationship provides for a close fitting, while limiting movement of adjacent panels once assembled. For example, the difference in dimensions may be from 0.005-5%, or from 0.02-0.5 mm.

(30) In contrast, the floor elements shown in FIGS. 13-16 may be assembled through horizontal motion. Specifically, is the length of the undercut 24, while corresponds to the horizontal rotated length of the upper cheek surface 22. Additionally, indicates the length of the snapping hooks 23, while the horizontal rotated length of the lower cheek surface 21 is specified by .

(31) Because is less than and is less than , the floor elements can only be assembled through horizontal movement. That is to say, due to the particular dimensions of the undercuts 24, upper cheek surface 22, snapping hooks 23 and lower cheek surface 21, the floor panels of the invention may be joined through substantially vertical movement of one panel with respect to a second panel.

(32) The dimensions c and n may also be related to the thickness of the floor element itself. For example, the ratio between and the thickness (or and the surface) may be in the range of about 0.025 to 0.2, typically, about 0.05 to about 0.1, and more typically, about 0.07 to 0.09. That is to say, when the thickness is 8 mm, as is common in conventional boards, or would be from 0.2 to 1.5 mm. Additionally, (or ) can be at least 2 times greater than (or ), while (or ) is at least 2 times (or ).

(33) Moreover, all dimension lines of FIGS. 9-16 are intended to indicate the area taken up by the inserted pan as the recesses, such as, the groove 13 and need not be deeper than the tongue 11. Although in some cases, the recesses are deeper than the length of the tongue 11. With particular reference to FIG. 9, 13 effectively is zero, meaning that there is no undercut when pivoting the panel.

(34) Finally, the floor elements of this invention, preferably, comprise vertically-joined edges on at least two sides. For example, when the floor panel has a substantially rectangular shape, such vertically-joined edges may be found on two, three or all four sides. When the vertically-joined edges are located on less than all sides of the floor element, the remaining sides may include, for example, edges joined by rotating or horizontal movement or simple straight edges without a joining profile.

(35) The invention is not limited by the embodiments shown since they can be varied within the scope if the invention.