(19)
(11)EP 3 392 428 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
29.04.2020 Bulletin 2020/18

(21)Application number: 18171009.6

(22)Date of filing:  07.03.2014
(51)International Patent Classification (IPC): 
E04F 15/02(2006.01)
E04F 15/10(2006.01)
E04F 15/04(2006.01)

(54)

BUILDING PANELS PROVIDED WITH A MECHANICAL LOCKING SYSTEM

BAUPLATTEN MIT EINEM MECHANISCHEN VERSCHLUSSSYSTEM

PANNEAUX DE CONSTRUCTION MUNIS D'UN SYSTÈME DE VERROUILLAGE MÉCANIQUE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 08.03.2013 SE 1350279
08.03.2013 US 201361774749 P

(43)Date of publication of application:
24.10.2018 Bulletin 2018/43

(62)Application number of the earlier application in accordance with Art. 76 EPC:
14760606.5 / 2964851

(73)Proprietor: Välinge Innovation AB
263 65 Viken (SE)

(72)Inventors:
  • NYGREN, Per
    SE-253 60 RAMLÖSA (SE)
  • BERGELIN, Marcus
    SE-263 52 LERBERGET (SE)

(74)Representative: Välinge Innovation AB 
Patent Department Prästavägen 513
263 65 Viken
263 65 Viken (SE)


(56)References cited: : 
FR-A1- 2 975 716
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    Technical Field of the Invention



    [0001] The present invention relates to a building panel such as a floor panel, a wall panel, a ceiling panel, a furniture component or the like, which is provided with a mechanical locking system comprising a displaceable tongue.

    Technical Background



    [0002] Building panels provided with a mechanical locking system comprising a displaceable tongue cooperating with a tongue groove for vertical locking is known and disclosed in, e.g., FR 2 975 716. The mechanical locking system in FR 2 975 716 has a displaceable tongue comprising an outer element which is pushed by a wedge part of a removable inner part of the tongue into a tongue groove, for vertical locking of adjacent edges of two floorboards. A drawback with this known system is that the locking strength is rather low.

    [0003] The above description of various known aspects and drawback is the Applicant's characterization of such, and is not an admission that any of the above description is considered as prior art.

    [0004] Although the description in the present disclosure relates to a floor panel, the description of techniques and problems thereof is applicable to other applications as well. For example, the description is also applicable to panels for other purposes, such as wall panels, ceiling panels, furniture panels and components, etc.

    Summary



    [0005] It is an object of embodiments of the present invention to provide an improvement over the above described conventional techniques.

    [0006] A further object of embodiments of the present disclosure is to provide building panels, such as floorboards, wall panels or panels for furniture, provided with a locking system that comprises a tongue that improves the vertical locking of the floorboards.

    [0007] Another object of embodiments of the present disclosure is to provide a more efficient production method, which requires less complicated production equipment.

    [0008] At least some of these and other objects and advantages that will be apparent from the present disclosure have been achieved by certain embodiments of the building panels described herein.

    [0009] The invention is defined by the appended claims.

    [0010] The building panels, such as floorboards, are provided with a locking system that comprises a displacement groove at a first edge of a first floorboard and a tongue groove at a second edge of a second floorboard. A tongue is arranged in the displacement groove and is configured to cooperate, in a second position, with the tongue groove for vertical locking of the first edge and the second edge. The tongue comprises, in a first position, an inner element and an outer element. The inner element is removable along the displacement groove, and is configured to cooperate with the outer element to obtain a displacement of the outer element towards the tongue groove and thereby obtain the second position. The inner element and the outer element are preferably configured to vertically overlap each other in the first position to obtain an increased contact surface between a surface of the displacement groove and the outer element of the tongue in the second position. The inner element and the outer element are arranged such that the increased contact surface takes up a moment of force that arises on the tongue when a load is applied on the first or the second floorboard. The inner element in the first position may be arranged above or below the outer element. The inner element in the first position may also be arranged partly above and partly behind the outer element, or may be arranged partly below the outer element and partly behind the outer element.

    [0011] The entire outer element is in the first position preferably arranged within the displacement groove.

    [0012] The first position may be an initial position before a removal of inner element is initiated.

    [0013] Said inner element and said outer element preferably vertically overlap each other when the inner element is displaced in order to remove the inner element from the displacement groove.

    [0014] The inner element is preferably a bar element. An advantage with a bar element may be that the inner element may be displaced forth and back in the case the inner element gut stuck during the removal of the inner element.

    [0015] An innermost surface of the inner element, in the first position, may be arranged within the guiding groove along an inner surface of the outer element.

    [0016] The outer element may be provided with a guiding groove at either an inner and upper edge of the outer element or at an inner and lower edge of the outer element, wherein at least a part of the inner element in the first position is arranged in said guiding groove. The outer element may be provided with a guiding groove at an inner surface of the outer element, between an upper surface and lower surface of the outer element, wherein at least a part of the inner element is arranged in said guiding groove in the first position. The guiding groove facilitates the removal of the inner element by guiding the inner element in a controlled manner and provides a groove without obstructions and with an eligible friction. The guiding groove preferably extends essentially along the whole longitudinal length of the outer element. This embodiment of the outer element provides for a simple production of the outer element for example by plastic profile extrusion and cutting of the profile in the desired length.

    [0017] The inner element preferably comprises a first protruding part configured to cooperate with the guiding groove, to obtain said displacement of the outer element.

    [0018] The first protruding part in the first position is preferably arranged outside of the outer element and/or in a recess of the outer element. When the inner element is removed by a displacement along the displacement groove and preferably in the guiding groove, the outer element is gradually pushed into the tongue groove to obtain the second position.

    [0019] The first protruding part may be wedge shaped or of an essentially spherical shape. Such shapes facilitate the displacement of the inner element. The outer element may also be provided with guiding surfaces at the location of the first protruding part in the first position. The first protruding part is preferably elastic, to make it easier to displace the first protruding part over irregularities in the displacement groove. The first protruding part may comprise an elastic material and may be provided with a recess to increase the elasticity.

    [0020] The inner element is preferably provided with a second protruding part, preferably configured such that the second protruding part is easy to grasp by an installer of the floorboards. The second protruding part may also be configured such that the inner element is secured in the correct position.

    [0021] The cross section of the inner element may be L-shaped or rectangular or of an essentially circular shape.

    [0022] The inner element may comprise plastic and may be produced by injection moulding or extrusion. An extruded inner element of plastic may be provided with the first and or the second protruding part by heating and compressing a part of the extruded profile in a press tool.

    [0023] The inner and outer element may be produced in one piece by injection moulding of plastic and connected together by a connection configured to break when the inner element is displaced or when the tongue is inserted into the displacement groove.

    [0024] The building panels may comprise a wood-based core, preferably made of at least one of MDF, HDF, OSB, WPC (Wood Plastic Composite), and particleboard, or of plastic, such as vinyl or PVC.

    Brief Description of the Drawings



    [0025] The present invention will by way of example be described in more detail with reference to the appended schematic drawings, which illustrate several embodiments.

    Figs. 1-3 show a known locking system with a tongue comprising an inner and an outer element.

    Figs. 4-7 show a tongue comprising a guiding groove at an inner edge, according to embodiments of the invention.

    Figs. 8 and 9 each shows a tongue from a top view, according to embodiments of the invention.

    Figs. 10 and 11 show cross-sections of a tongue comprising an L-shaped inner element, according to embodiments of the invention.

    Figs. 12-15 show tongues comprising a guiding groove at an inner surface, according to embodiments of the invention.

    Figs. 17-19 show a method for producing an inner element of a tongue, according to embodiments of the invention.

    Fig. 20 shows an embodiment of an inner element of a tongue, according to an embodiment of the invention.

    Figs. 21 and 22 show a tongue with an inner element having a circular cross-section.

    Figs. 23-25 show a displacement groove provided with recess, according to an embodiment of the invention.

    Figs. 26 shows a tongue from a top view, according to an embodiment of the present disclosure.


    Detailed Description



    [0026] Figs. 1-3 show floorboards provided with a known locking system which comprises a tongue 20 having an inner element 21 and an outer element 22. The tongue 20 is arranged in a displacement groove 24 at a first edge 1b of a first floorboard. Fig. 1 shows a position during assembling of the first floorboard. The first floorboard is arranged in a second row and is connected at a third edge to a fourth edge of a third floorboard in first row. A second floorboard is arranged in an angled position with a third edge adjacent the fourth edge of the third floorboard and a second edge 1c of the second floorboard is arranged adjacent the first edge 1b of the first floorboard.

    [0027] Fig. 2 shows a cross-section of the first edge 1b and the second edge 1c after the second floorboard is angled down and connected to the third floorboard in the first row. The first edge 1b and the second edge 1c are in Fig. 2 locked together in the horizontal direction, and the inner element 21 and the outer element 22 of the tongue 20 are arranged in a first position. The first edge 1b and the second edge 1c are in the first position vertically unlocked. To lock the first edge 1b and the second edge 1c in the vertical direction, the inner element 21 is displaced and removed along the first edge 1b. The inner element 21 is provided with a protruding part. The protruding part pushes the outer element 22 of the tongue 20 into a tongue groove 23 at the second edge 1c of the second floorboard when the inner element 21 is displaced and removed.

    [0028] Fig 3 shows a cross-section of the first edge 1b and the second edge 1c in a second position. The inner element 21 of the tongue 20 is in the second position displaced and removed. The outer element 22 of the tongue 20 cooperates with the tongue groove 23 at the second edge 1c of the second floorboard for vertical locking of the first edge 1b and the second edge 1c.

    [0029] An embodiment of the invention is shown in Fig. 4 and Fig. 5, with an inner and outer element 31, 30 of the tongue 10 arranged in a displacement groove 32 at a first edge 1b of a first floorboard. Figs. 4 and 5 illustrate the first position and the second position, respectively, of the inner and outer elements 31, 30. The outer element 30 of the tongue 10 extends below the inner element 31 of the tongue 10, such that the inner element 31 vertically overlaps the outer element 30. The inner element 31 is in this embodiment arranged in a guiding groove 60 at an inner and upper edge of the outer element 30. The width x of a first contact surface between a lower surface of the outer element 30 of the tongue 10 and the displacement groove 32 is increased, as compared to the known locking system shown in Fig. 3, in order to improve the strength of the locking system and minimize the offset in height between the first edge 1b and the second edge 1c when a load is applied, in the second position, on the first floorboard.

    [0030] The second position in which the outer element 30 is pushed into the tongue groove 33 at the second edge 1c is shown in Fig. 5. The outer element 30 is pushed into tongue groove 33 by a first protruding part 36 (see Figs. 8 and 9) arranged on the inner element 31, when the inner element 31 is removed and displaced along the first edge 1b. A load applied on the first edge 1b will be taken up by a second contact surface, between an upper surface of the outer element 30 of the tongue 10 and the displacement groove 32, and a third contact surface between a lower surface of the outer element 30 of the tongue and the tongue groove 33. Since the second contact surface and the third contact surface are displaced, the load applied will result in a moment of force, which is taken up by the first contact surface. In order to increase the strength of the locking system, the width x of the first contact surface is preferably larger than the width y of the third contact surface, and preferably the width x is about twice ore more the width y. For the purpose of reducing the momentum that arises when a load is applied on the first edge 1b, the horizontal distance between the second and the third contact surfaces should be as small as possible, preferably less than about 1 mm and more preferably less than about 0,5 mm. This applies also to the embodiments described below.

    [0031] The locking system additionally comprises in this embodiment a locking strip 6, which protrudes horizontally from the first edge 1b. The locking strip 6 is provided with a locking element 8 which cooperates with a locking groove 14 provided at the second edge 1c for horizontal locking of the first edge 1b and the second edge 1c. A load applied on the second edge 1c is preferably taken up by a strip contact surface between an upper surface of the locking strip 6 and a lower surface of the second edge 1c.

    [0032] In order to push the first edge 1b and the second edge 1c vertically against each other, a lower surface of the tongue groove 33 at the third contact surface is preferably arranged with an angle β1 in relation to the horizontal plane of the floorboards. The angle β1 may be in the range of about 5 ° to about 20 °, and preferably about 15°.

    [0033] In the embodiment shown in Figs. 6 and 7, the tongue 10 is arranged in a displacement groove 32 at the second edge 1c. The inner element 31 of the tongue 10 is for this embodiment preferably arranged in a guiding groove 60 at an inner and lower edge of the outer element 30 of the tongue 10 to obtain an increased first contact surface between an upper surface of the outer element 30 of the tongue 10 and the displacement groove 32. Also, in this embodiment the first contact surface takes up a momentum force resulting from a load applied at the first edge 1b, in a similar way as described for the embodiment shown in Figs. 4 and 5. In order to push the first edge 1b and the second edge 1c vertically against each other, an upper surface of the tongue groove is preferably arranged with an angle β2 in relation to the horizontal plane of the floorboards. The angle β2 may be in the range of about 5 ° to about 20 °, and preferably about 15°.

    [0034] Figs. 8 and 9 show top view embodiments of a tongue 10 of an elongated shape, to be arranged in a displacement groove 32 at a first edge 1b of a first floorboard. The tongue comprises an inner element 31 and an outer element 30. The inner element 31 is arranged in a guiding groove 60 at an inner edge of the outer element 30. The inner element 31 is preferably a bar element of an elongated shape and is provided at a first short edge with a first protruding part in the form of a wedge shaped element 36. The wedge shaped element 36 is configured to push the outer element 30 into a tongue groove 33 of an adjacent second edge 1c of a second floorboard when the inner element 31 is removed and displaced along the first edge 1b. The wedge shaped element is in a prefered embodiment guided by the guiding groove during the displacement of the inner element. The wedge shaped element 36 is, before the displacement, preferably arranged adjacent and at least partly outside a first short edge of the outer element 30 as shown in Fig. 8. A second edge of the inner element 31 is preferably provided with a gripping part 37 that facilitates the displacement of the inner element 31. Fig. 9 shows that the first short edge of the outer element 30 may be provided with first chamfer 38 that guides the wedge shaped element 36 into the guiding groove 60. The gripping part 37 is, before displacement of the inner element 31, preferably arranged adjacent a second short edge of the outer element 30 and preferably outside the second edge. As shown in Fig. 9 the inner element 31 may be provided with a second protruding part 40, for a correct positioning of the inner element 31, that before displacement of the inner element is preferably arranged in a notch or in a second chamfer 39 provided at the second short edge of the outer element 30. The outer element 30 may have a uniform cross-section from the first short edge to the second short edge. A uniform cross-section makes it possible to produce the outer element 30 at low cost, by e.g., extrusion of plastic. Also the inner element 31 may have uniform cross-section with the exception of the protruding part (wedge shaped element) 36 at the first edge. For the purpose of obtaining a correct position of the inner element 31, a preferred embodiment of the present disclosure comprises the first chamfer 38 and the second chamfer 39, which cooperate with the first protruding part 36 and the second protruding part 40, respectively.

    [0035] Figs. 10 and 11 show an embodiment of the tongue 10 comprising an L-shaped inner element 31 arranged in a corresponding guiding groove at an inner edge of the outer element 30.

    [0036] Figs. 12-15 show an embodiment of the tongue 10 comprising inner element 31 arranged in a guiding groove 60 at an inner surface of the outer element 30. Fig. 13 shows that outer edges 42, 43 of the outer element 30 may be chamfered in order to guide the outer element 30 into the tongue groove 33. Fig. 14 shows a cross section of the tongue 10 and that the guiding groove 60 may be provided with chamfered edges 41. Fig. 15 shows a cross section of the tongue 10 in a plane indicated by AA in Fig. 14. The inner element 31 in this embodiment is provided with friction elements 44 that avert that the inner element 31 from falling out before the floorboards are installed. The first protruding part 36 is provided with a recess 45 that makes its most protruding part 46 more resilient. The most protruding part 46 may be, during the displacement of the inner element 31, compressed during, e.g., entrance of the inner element 21 into the guiding groove 60, or at any irregularities in the displacement groove 32. Also the other embodiments of the tongue 10 may be provided with a friction element 44 on the inner element 31 and/or on the outer element 30, and/or a recess 45 in the first protruding part 36.

    [0037] A method for producing the first protruding part 36 and/or the second protruding part 40 of the inner element 31 is illustrated in Figs. 17-19. A plastic blank 50 of an elongated shape is displaced into a press tool comprising a first part 55 and a second part 56. The first part 55 and the second part 56 are displaced against each other and a protruding part 35 at a first short edge of the plastic blank 50 is formed under heat and pressure. The process may be repeated for a second short edge of the plastic blank 50. The method may also comprise the step of forming the second protruding part 35 simultaneously and essentially in the same manner as the first protruding part 35. The produced first and/or second protruding part 35 may be of, for example, an essentially spherical shape or wedge shaped. Fig. 20 shows an inner element 31 that may be produced according to the method illustrated in Figs. 17-19. The inner element 31 preferably has an essentially circular cross-section and preferably comprises protruding parts 35 of an essentially spherical shape.

    [0038] Figs. 21 and 22 not forming part of the present invention, show that an inner element 31 with a circular cross section may be combined with a displacement groove 32 having an inner surface 62, which is smaller than the opening of the displacement groove 32. The inner surface 62 may be provided with a round shaped bottom that facilitates the displacement of the inner element 31.

    [0039] An upper or lower surface of the displacement groove 32 may be provided with a recess 34 having an angled surface at an angle β3 to the horizontal plane. The angle β3 may be in the range of about 3° to about 10°. An embodiment of the recess 34 is shown in Figs. 23-25. The recess 34 and the angled surface has the effect that the outer element 30 of the tongue 10 tilts and the outer element 30 is restrained from being displaced back into the displacement groove 32 after the outer element 30 is pushed into the tongue groove 33 by the inner element 31. Such a recess 34 may be provided in locking systems comprising any type of the disclosed displaceable tongue.

    [0040] A prefered embodiment of the tongue 10 is shown in Fig 26. The inner element 31 and the outer element 30 are produced in one piece by injection moulding of plastic. The inner element 31 and the outer element 30 are connected together by a connection 47 configured to break when the inner element is displaced or when the tongue is inserted into the displacement groove.


    Claims

    1. Floorboards including at least a first floorboard and a second floorboard provided with a mechanical locking system comprising:

    a displacement groove (32) at a first edge (1b) of the first floorboard and a tongue groove (33) at a second edge of the second floorboard (1c), a tongue (10) arranged in the displacement groove (32) and configured to cooperate, in a second position, with the tongue groove (33) for vertical locking of the first edge (1b) and the second edge (1c),

    wherein the tongue (10) comprises, in a first position, an inner element (31) and an outer element (30), the inner element being removable along the displacement groove (32) and configured to cooperate with the outer element to obtain a displacement of the outer element (30) towards the tongue groove (33) and thereby obtain the second position,

    wherein the displacement groove (32) comprises in use an upper surface, a lower surface, an opening and an inner surface (62) between the upper surface and the lower surface,

    wherein the displacement groove (32) comprises a recess (34) starting from the opening of the displacement groove,

    characterized in that the recess (34) has an angled surface at an angle (β3) to the horizontal plane such that the outer element (30) of the tongue (10) tilts and the outer element (30) is restrained from being displaced back into the displacement groove (32) after the outer element (30) is pushed into the tongue groove (33) by the inner element (31).


     
    2. Floorboards as claimed in claim 1, wherein the angle (β3) is in the range of about 3° to about 10°.
     
    3. Floorboards as claimed in claim 1 or 2, wherein said inner element (31) and said outer element (30) vertically overlap each other in the first position.
     
    4. Floorboards as claimed in any one of the preceding claims, wherein said inner element (31) and said outer element (30) vertically overlap each other when the inner element is displaced, in order to be removed from the displacement groove.
     
    5. Floorboards as claimed in any one of the preceding claims, wherein the inner element (31) is a bar element.
     
    6. Floorboards as claimed in any one of the preceding claims, wherein the inner element (31) in the first position is arranged above or below the outer element (30).
     
    7. Floorboards as claimed in any one of the preceding claims 1-5, wherein the inner element (31) in the first position is arranged partly above and partly behind the outer element (3), or is arranged partly below the outer element and partly behind the outer element.
     
    8. Floorboards as claimed in any one of the preceding claims, wherein the outer element (30) is provided with a guiding groove (60) at either an inner and upper edge of the outer element or at an inner and lower edge of the outer element (30), and at least a part of the inner element in the first position is arranged in said guiding groove (60).
     
    9. Floorboards as claimed in any one of the preceding claims 1-7, wherein the outer element is provided with a guiding groove (60) at an inner surface of the outer element (30), between an upper surface and a lower surface of the outer element, and at least a part of the inner element is arranged in said groove in the first position.
     
    10. Floorboards as claimed in claim 8 or 9, wherein the guiding groove (60) extends essentially along the whole longitudinal length of the outer element.
     
    11. Floorboards as claimed in any one of the claims 8-10, wherein in the first position an innermost surface of the inner element (31) is within the guiding groove (60) along an inner surface of the outer element (30).
     
    12. Floorboards as claimed in any one of the claims 8-11, wherein the inner element (31) comprises a first protruding part (36) configured to cooperate with the guiding groove (60), to obtain said displacement of the outer element.
     
    13. Floorboards as claimed in claim 12, wherein the first protruding part (36) in the first position is arranged outside of the outer element and/or in a recess of the outer element.
     
    14. Floorboards as claimed in claim 12 or 13, wherein the first protruding part is one of wedge shaped and essentially spherical shaped.
     
    15. Floorboards as claimed in any one of the preceding claims, wherein the entire outer element is arranged within the displacement groove in the first position.
     


    Ansprüche

    1. Bodenplatten, die wenigstens eine erste Bodenplatte und eine zweite Bodenplatte einschließen, die mit einem mechanischen Verriegelungssystem versehen sind, das umfasst:

    eine Verschiebungs-Nut (32) an einer ersten Kante (1b) der ersten Bodenplatte und eine Feder-Nut (33) an einer zweiten Kante der zweiten Bodenplatte(1c), eine Feder (10), die in der Verschiebungs-Nut (32) angeordnet und so ausgeführt ist, dass sie in einer zweiten Position mit der Feder-Nut (33) zusammenwirkt, um die erste Kante (1b) und die zweite Kante (1c) vertikal zu verriegeln,

    wobei die Feder (10) in einer ersten Position ein inneres Element (31) sowie ein äußeres Element (30) umfasst, das innere Element entlang der Verschiebungs-Nut (32) entfernt werden kann und so ausgeführt ist, dass es mit dem äußeren Element zusammenwirkt, um eine Verschiebung des äußeren Elementes (30) auf die Feder-Nut (33) zu zu erreichen und damit die zweite Position einzunehmen,

    die Verschiebungs-Nut (32) in Funktion eine obere Fläche, eine untere Fläche, eine Öffnung sowie eine innere Fläche (62) zwischen der oberen Fläche und der unteren Fläche umfasst,

    die Verschiebungs-Nut (32) eine von der Öffnung der Verschiebungsnut ausgehende Aussparung (34) aufweist,

    dadurch gekennzeichnet, dass die Aussparung (34) eine schräge Fläche in einem Winkel (β3) zu der horizontalen Ebene aufweist, so dass das äußere Element (30) der Feder (10) geneigt ist und das äußere Element (30) daran gehindert wird, wieder in die Verschiebungs-Nut (32) hinein verschoben zu werden, nachdem das äußere Element (30) durch das innere Element (31) in die Feder-Nut (33) hinein geschoben worden ist.


     
    2. Bodenplatten nach Anspruch 1, wobei der Winkel (β3) im Bereich von ungefähr 3° bis ungefähr 10° liegt.
     
    3. Bodenplatten nach Anspruch 1 oder 2, wobei das innere Element (31) und das äußere Element (30) einander in der ersten Position vertikal überlappen.
     
    4. Bodenplatten nach einem der vorangehenden Ansprüche, wobei das innere Element (31) und das äußere Element (30) einander vertikal überlappen, wenn das innere Element verschoben wird, um es aus der Verschiebungs-Nut zu entfernen.
     
    5. Bodenplatten nach einem der vorangehenden Ansprüche wobei das innere Element (31) ein Schienen-Element ist.
     
    6. Bodenplatten nach einem der vorangehenden Ansprüche, wobei das innere Element (31) in der ersten Position oberhalb oder unterhalb des äußeren Elementes (30) angeordnet ist.
     
    7. Bodenplatten nach einem der vorangehenden Ansprüche 1-5, wobei das innere Element (31) in der ersten Position teilweise oberhalb von und teilweise hinter dem äußeren Element (3) oder teilweise unterhalb von dem äußeren Element und teilweise hinter dem äußeren Element angeordnet ist.
     
    8. Bodenplatten nach einem der vorangehenden Ansprüche, wobei das äußere Element (30) mit einer Führungs-Nut (60) entweder an einer inneren und oberen Kante des äußeren Elementes oder an einer inneren und unteren Kante des äußeren Elementes (30) versehen ist, und wenigstens ein Teil des inneren Elementes in der ersten Position in der Führungs-Nut (60) angeordnet ist.
     
    9. Bodenplatten nach einem der vorangehenden Ansprüche 1-7, wobei das äußere Element mit einer Führungs-Nut (60) an einer inneren Fläche des äußeren Elementes (30) zwischen einer oberen Fläche und einer unteren Fläche des äußeren Elementes versehen ist und wenigstens ein Teil des inneren Elementes in der ersten Position in der Nut angeordnet ist.
     
    10. Bodenplatten nach Anspruch 8 oder 9, wobei sich die Führungsnut (60) im Wesentlichen über die gesamte Länge des äußeren Elementes in Längsrichtung erstreckt.
     
    11. Bodenplatten nach einem der Ansprüche 8-10, wobei in der ersten Position eine innerste Fläche des inneren Elementes (31) sich im Inneren der Führungsnut (60) entlang einer inneren Fläche des äußeren Elementes (30) befindet.
     
    12. Bodenplatten nach einem der Ansprüche 8-11, wobei das innere Element (31) einen ersten vorstehenden Teil (36) umfasst, der so ausgeführt ist, dass er mit der Führungs-Nut (60) zusammenwirkt, um die Verschiebung des äußeren Elementes zu bewirken.
     
    13. Bodenplatten nach Anspruch 12, wobei der erste vorstehende Teil (36) in der ersten Position außerhalb des äußeren Elementes und/oder in einer Aussparung des äußeren Elementes angeordnet ist.
     
    14. Bodenplatten nach Anspruch 12 oder 13, wobei der erste vorstehende Teil keilförmig oder im Wesentlichen sphärisch ist.
     
    15. Bodenplatten nach einem der vorangehenden Ansprüche, wobei das gesamte äußere Element in der ersten Position im Inneren der Verschiebungs-Nut angeordnet ist.
     


    Revendications

    1. Lames de plancher incluant au moins une première lame de plancher et une seconde lame de plancher munies d'un système de verrouillage mécanique comprenant :

    une rainure à déplacement (32) au niveau d'un premier bord (1b) de la première lame de plancher et une rainure à languette (33) au niveau d'un second bord de la seconde lame de plancher (1c), une languette (10) disposée dans la rainure à déplacement (32) et configurée pour coopérer, dans une seconde position, avec la rainure à languette (33) pour un verrouillage vertical du premier bord (1b) et du second bord (1c),

    où la languette (10) comprend, dans une première position, un élément interne (31) et un élément externe (30), l'élément interne pouvant être retiré le long de la rainure à déplacement (32) et configuré pour coopérer avec l'élément externe pour obtenir un déplacement de l'élément externe (30) en direction de la rainure à languette (33) et obtenir ainsi la seconde position,

    où la rainure à déplacement (32) comprend pendant l'utilisation une surface supérieure, une surface inférieure, une ouverture et une surface interne (62) entre la surface supérieure et la surface inférieure,

    où la rainure à déplacement (32) comprend un évidement (34) commençant depuis l'ouverture de la rainure à déplacement,

    caractérisées en ce que l'évidement (34) a une surface oblique à un angle (β3) par rapport au plan horizontal de sorte que l'élément externe (30) de la languette (10) s'incline et l'élément externe (30) est empêché d'être déplacé en arrière dans la rainure à déplacement (32) après que l'élément externe (30) soit poussé dans la rainure à languette (33) par l'élément interne (31).


     
    2. Lames de plancher selon la revendication 1, où l'angle (β3) est dans la plage d'environ 3° à environ 10°.
     
    3. Lames de plancher selon la revendication 1 ou 2, où ledit élément interne (31) et ledit élément externe (30) se chevauchent verticalement dans la première position.
     
    4. Lames de plancher selon l'une quelconque des revendications précédentes, où ledit élément interne (31) et ledit élément externe (30) se chevauchent verticalement quand l'élément interne est déplacé, pour être retiré de la rainure à déplacement.
     
    5. Lames de plancher selon l'une quelconque des revendications précédentes, où l'élément interne (31) est un élément en barre.
     
    6. Lames de plancher selon l'une quelconque des revendications précédentes, où l'élément interne (31) dans la première position est disposé au-dessus ou en-dessous de l'élément externe (30).
     
    7. Lames de plancher selon l'une quelconque des revendications 1-5 précédentes, où l'élément interne (31) dans la première position est disposé en partie au-dessus et en partie derrière l'élément externe (3), ou est disposé en partie en-dessous de l'élément externe et en partie derrière l'élément externe.
     
    8. Lames de plancher selon l'une quelconque des revendications précédentes, où l'élément externe (30) est muni d'une rainure de guidage (60) au niveau d'un bord interne et supérieur de l'élément externe ou au niveau d'un bord interne et inférieur de l'élément externe (30), et au moins une partie de l'élément interne dans la première position est disposée dans ladite rainure de guidage (60).
     
    9. Lames de plancher selon l'une quelconque des revendications 1-7 précédentes, où l'élément externe est muni d'une rainure de guidage (60) au niveau d'une surface interne de l'élément externe (30), entre une surface supérieure et une surface inférieure de l'élément externe, et au moins une partie de l'élément interne est disposée dans ladite rainure dans la première position.
     
    10. Lames de plancher selon la revendication 8 ou 9, où la rainure de guidage (60) s'étend sensiblement le long de toute la longueur longitudinale de l'élément externe.
     
    11. Lames de plancher selon l'une quelconque des revendications 8-10, où dans la première position une surface la plus interne de l'élément interne (31) est dans la rainure de guidage (60) le long d'une surface interne de l'élément externe (30).
     
    12. Lames de plancher selon l'une quelconque des revendications 8-11, où l'élément interne (31) comprend une première partie en saillie (36) configurée pour coopérer avec la rainure de guidage (60), pour obtenir ledit déplacement de l'élément externe.
     
    13. Lames de plancher selon la revendication 12, où la première partie en saillie (36) dans la première position est disposée à l'extérieur de l'élément externe et/ou dans un évidement de l'élément externe.
     
    14. Lames de plancher selon la revendication 12 ou 13, où la première partie en saillie est en forme de coin ou sensiblement en forme de sphère.
     
    15. Lames de plancher selon l'une quelconque des revendications précédentes, où tout l'élément externe est disposé dans la rainure à déplacement dans la première position.
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description