Set of panels comprising a locking device

Abstract

The present disclosure relates to a set of panels comprising locking means for locking a first edge portion (1a) of a first panel (1) to a second edge portion (2b) of a second panel (2). The locking device comprises a horizontal locking device and a vertical locking device. The vertical locking device comprises a separate tongue (3) arranged in an insertion groove (4) of the first edge portion, and a tongue groove (5) provided in the second edge portion. In a vertically locked state of the first and second edge portions, an abutment member (13) provided at a longitudinal end portion of the individual tongue cooperates with the stop surface (12) of the second edge portion and the locking portion of the individual tongue cooperates with the tongue groove.

Description

Technical Field

[0001] The present disclosure generally relates to a set of panels including a locking device. More specifically, the locking device includes a single tongue configured to cooperate with a tongue groove for vertically locking an edge portion of a panel. The panel may be a building panel, a floor panel, a ceiling panel, a furniture component or a wall panel. Background Art

[0002] WO 2022 / 197234A1 discloses a panel comprising a novel mechanical locking system that allows the panel to be more easily disassembled. For example, the panel can be disassembled without using tools and / or without applying force to the edge of the panel with tools.

[0003] However, there is still room for improvement in such mechanical locking systems, particularly with respect to certain types of floor panels, such as floor panels having a greater thickness. Summary of the invention

[0004] It is therefore an object of at least some embodiments of the present disclosure to provide a set of panels comprising a locking device that can be disassembled in an improved manner, for example without the use of tools that interact with the locking device. For example, disassembly may involve manual operation only.

[0005] It is another object of at least some embodiments of the present disclosure to provide for easier and / or faster disassembly or reassembly of a set of panels.

[0006] These and other objects and advantages that will become apparent from the description have been achieved through the various aspects, embodiments and examples described below.

[0007] According to the present disclosure, a set of panels, such as building panels, is provided, the set of panels comprising a first panel and a second panel, and a locking device for locking a first edge portion of the first panel to a second edge portion of the second panel. The panels comprise a front side and a rear side, wherein a normal to a main plane extending along the front side and / or the rear side defines a vertical direction, which preferably extends away from the front side of the first panel and the second panel. The locking device comprises a horizontal locking device and a vertical locking device. The vertical locking device comprises: a separate tongue arranged in an insertion groove of the first edge portion, wherein a longitudinal extension length of the separate tongue extends along the first edge portion; and a tongue groove arranged in the second edge portion and extending along the second edge portion. In the vertical locked state of the first and second edge portions, an abutment member arranged at a longitudinal end portion of the separate tongue cooperates with a stop surface of the second edge portion, and a locking portion of the separate tongue cooperates with the tongue groove.

[0008] According to the present disclosure, in the vertically locked state, the lateral extension of the separate tongues from the insertion groove is greater at the locking portion than at the longitudinal end portions. Thus, the edge portions can be locally substantially vertically unlocked at the longitudinal end portions, and the separate tongues, which are preferably flexible, can be gradually inserted into the tongue grooves along the edge portions for providing their vertical locking.

[0009] In addition, according to the present disclosure, the first and second panels can be disassembled by vertically displacing the first edge portion and the second edge portion in a direction away from each other, preferably by means of a scissor-type or folding displacement, the first edge portion and the second edge portion being vertically displaced in a direction away from each other, the vertical displacement starting from the vicinity of the position of the abutment member. For example, these edge portions can be vertically unlocked by a relative vertical displacement of the first and second edge portions away from each other, the relative vertical displacement preferably being substantially performed manually, optionally using a lifting element below the second panel. During unlocking by means of a folding displacement, the separate tongue can be gradually displaced into the insertion groove along the first edge portion. In view of the above, disassembly or reassembly of the panels can be easier and / or less time-consuming. In particular, during disassembly, a separate tool that interacts with the locking device may not be required, although this is not excluded. As will be outlined elsewhere herein, in some embodiments, these edge portions can be unlocked by repeatedly displacing them vertically away from and toward each other. A separate tool may be suitable for removing certain fragile panels, such as perforated panels, which may be at risk of damage during manual removal.

[0010] The stop surface may prevent the separate tongue from being displaced outwards from the insertion groove, preferably at least in a horizontal direction. The stop surface may also be a guide surface, which guides the separate tongue, for example during locking.

[0011] The stop surface may comprise an area of ​​the second edge part which cooperates with the separate tongue in the locked state and optionally also an area which cooperates with the separate tongue during locking and / or during unlocking.

[0012] In general, the mating surfaces may be mated by direct engagement or may be mated indirectly. Examples of such mating surfaces include surfaces of abutment members and stop surfaces. In any embodiment described herein, a sealant such as wax or adhesive may be provided between the mating surfaces, thereby providing an example of indirect engagement.

[0013] The abutment member may be provided in an outer and preferably lower part of the separate tongue.

[0014] The abutment member may protrude downwardly.

[0015] In some embodiments, both opposite longitudinal end portions of the individual tenon may comprise an abutment member. Thus, the abutment member may be one of at least two abutment members, and each of the two opposite longitudinal end portions of the individual tenon comprises a corresponding one of the at least two abutment members. Thus, in the vertical locked state, the individual tenon may present a curved, preferably substantially symmetrical shape. Furthermore, the unlocking of these edge portions may start from either of their two sides. Furthermore, it may be applicable to situations where the group of panels comprises multiple types of panels so that these panels are locked to each other to form a pattern, such as a herringbone pattern, such as comprising so-called A-panels and B-panels. Here, the individual tenon may comprise an abutment member that faces a preferred portion or side of the edge portion, such as a specific corner portion, regardless of the type of panel into which it is inserted.

[0016] The first edge portion of the first panel and the second edge portion of the second panel may be short edge portions. However, in some embodiments, the two edge portions may be long edge portions. In general, the short edge portion is shorter than the long edge portion.

[0017] A stop surface may be provided below the tongue groove.

[0018] The stop surface may be provided outside the opening of the tongue groove.

[0019] In the vertical locked state, the locking portion of the separate tongue may be spaced apart from the stop surface.

[0020] The stop surface may be planar and may extend substantially vertically, e.g. vertically. With regard to extending substantially vertically, the stop surface may preferably be at an angle of 0°-10°, e.g. 0°-5° or 0°-2°, relative to the normal N. Thus, the cooperation between the abutment member and the stop surface may provide little or even no vertical locking of the edge portion. Thus, a simpler assembly and / or disassembly of the panel may be provided.

[0021] In the vertical locked state, the abutment member may be pre-tensioned against the stop surface. For example, the separate tongue may comprise a flexible member. Pre-tensioning of the separate tongue may result in it being biased outwards, for example by a spring force. By means of the abutment member, the separate tongue may present a longitudinally bent or curved form, such that one or more longitudinal end portions of the separate tongue cooperate with one or more stop surfaces of the second edge portion and its locking portion cooperates with the tongue groove.

[0022] Preferably, the separate tongue is flexible.

[0023] The separate tongue may comprise a flexible member configured to face an inner portion of the insert groove when the separate tongue is arranged in the insert groove.The flexible member may be configured to displace the separate tongue outwards during locking or unlocking.

[0024] During locking, the second edge portion, preferably the lower mating surface, may cooperate, preferably directly cooperate, with the locking portion for displacing the separate tongue into the insertion groove.

[0025] During locking, the locking part may be configured to be gradually inserted into the insertion groove along the first edge portion in a first stage, and in a subsequent second stage, the locking part may be configured to be gradually inserted into the tongue groove along the second edge portion.

[0026] The abutment member and the locking portion of the separate tongue may be operatively coupled such that during locking the second edge portion pushes the locking portion in a direction towards the inside of the insertion groove, thereby causing the abutment member to move together with the locking portion in a direction towards the inside of the insertion groove.

[0027] The abutment member may comprise a straight portion extending parallel to the longitudinal extension of the individual tongues, which straight portion is preferably arranged longitudinally inside a longitudinal curved section provided in one or more longitudinal end portions. By means of the straight portion a larger contact surface with the second edge portion may be provided. Thus, the risk of damaging fragile panels, such as porous panels, such as panels comprising particle boards or OSB boards, during locking and / or during unlocking may be reduced.

[0028] Each flexible member may extend from a respective base portion of an individual tongue. Each flexible member may extend from a respective base portion and may be bent around the respective base portion. In some embodiments, the flexible members extending from the base portion arranged at the longitudinal end portion may extend from the longitudinal inner side of the base portion and may be bent around the longitudinal inner side of the base portion. Thus, less force is required at the longitudinal end portion to displace the individual tongue and thus easier unlocking may be achieved.

[0029] The abutment member may be at least partially, for example completely, arranged longitudinally outside the flexible member.Therefore, the outwardly directed pressure from the flexible member becomes smaller at the location of the abutment member, and the edge portion can be unlocked more easily.

[0030] In the vertical locked state the separate tongue, preferably the locking part of the separate tongue, can be bent in the longitudinal direction.

[0031] The horizontal locking device may include a locking element arranged on a strip extending horizontally outward from a lower portion of the first edge portion, and a locking groove provided in the second edge portion. The locking element and the locking groove may be configured to cooperate to provide a horizontal locking state of the first and second edge portions.

[0032] The first and second edge portions may be configured to be vertically unlocked by a preferably forced relative vertical displacement of the first and second edge portions away from each other and / or by a repeated, preferably forced relative vertical displacement of the first and second edge portions away from each other and towards each other. The repeated relative vertical displacement may comprise a jerky displacement of the edge portions up and down. By means of repeated displacements, preferably by means of folding displacements, the unlocking of the edge portions becomes more controlled in some embodiments. In fact, after a first relative vertical displacement of the edge portions away from each other, a part of the individual tongue may be stuck, thereby obtaining a partially unlocked edge portion, and a second relative vertical displacement of the edge portions towards each other may at least partially release the individual tongue from the stuck; thereafter, a third relative vertical displacement of the edge portions away from each other may follow, whereby the edge portions may be further unlocked. Another advantage is that by means of the relative vertical displacement, the risk of damaging the edge portions, for example at their decorative layers, and / or the locking device may be reduced. In fact, excessive forces from a relative vertical displacement directed only in a single direction may damage the edge portions or the locking device, in particular for fragile panels.

[0033] In some embodiments, the abutment member may be provided in an outer and preferably upper part of the individual tongue. Such an embodiment is largely similar to the embodiments described elsewhere herein, in which the abutment member is provided in the outer lower part, to which reference is hereby made. However, any one or both of the following embodiments may be interchanged with the corresponding embodiments disclosed above: the abutment member and / or the stop surface may be inclined; the stop surface may be provided in an upper part of the tongue groove, or provided vertically above the tongue groove.

[0034] The first panel and the second panel can be elastic panels. The elastic panel may include a core, which includes a polymer material such as a thermoplastic material. The thermoplastic material can be foamed. The thermoplastic material may include polyvinyl chloride (PVC), polyester, polypropylene (PP), polyethylene (PE), polystyrene (PS), polyurethane (PU), polyethylene terephthalate (PET), polyacrylate, methacrylate, polycarbonate, polyvinyl butyral, polybutylene terephthalate, or a combination thereof. In some embodiments, the core may include at least two layers.

[0035] The first panel and the second panel may comprise a decorative layer, such as a decorative foil comprising a thermoplastic material. The thermoplastic material of the decorative layer may be or comprise PVC, polyester, PP, PE, PS, PU, ​​PET, polyacrylate, methacrylate, polycarbonate, polyvinyl butyral, polybutylene terephthalate, or a combination thereof. The decorative foil is preferably printed, such as by direct printing, rotogravure printing or digital printing.

[0036] The first panel and the second panel may include a wear layer, such as a film or foil. The wear layer may include a thermoplastic material. The thermoplastic material may be PVC, polyester, PP, PE, PS, PU, ​​PET, polyacrylate, methacrylate, polycarbonate, polyvinyl butyral, polybutylene terephthalate, or a combination thereof.

[0037] The first and second panels may comprise a wood based core, such as high density fibreboard, HDF, medium density fibreboard, MDF, particle board, oriented strand board, OSB or plywood.

[0038] Generally, unless explicitly defined otherwise, all terms used herein, such as all terms used in the claims, are to be interpreted according to their ordinary meanings in the technical field. Unless explicitly stated otherwise, all expressions of "one / an / the / said [element, member, device, component, mechanism, step, etc.]" should be interpreted openly as referring to at least one instance of the element, device, component, mechanism, step, etc. The expression of one or more of "at least one element" etc. may be simply referred to as "element". BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present disclosure will be described below in conjunction with exemplary embodiments and will be described in more detail with reference to the accompanying exemplary drawings, in which:

[0040] Figure 1a-1e An embodiment of a panel is shown in a top view ( Figure 1a-1b ) and assembled panel embodiments ( Figure 1c-1d ), and shows in perspective an embodiment of a panel during assembly or during disassembly ( Figure 1e ).

[0041] Figure 2a-2f Take the side view C1-C1( Figure 2a ) and cross-sectional side views C2-C2 and C3-C3 ( Figure 2c and Figure 2e ) and the corresponding enlarged side view ( Figure 2b ) and enlarged cross-sectional side view ( Figure 2d and Figure 2f ) shows, for example Figure 1c-1d Embodiment of the middle panel.

[0042] Figure 3a-3d In perspective ( Figure 3a ), the corresponding enlarged perspective view ( Figure 3b ) and along Figure 3a Section AA( Figure 3c ) and BB( Figure 3d ) shows an embodiment of a separate tongue in the form of a sectional side view.

[0043] Figure 4a-4b In top view ( Figure 4a ) and the corresponding enlarged top view ( Figure 4b ) shows an embodiment of a separate tongue in an unlocked state and in a locked state of the edge part.

[0044] Figure 4c A cut away perspective view of an embodiment of a first panel and a separate tongue in a locked state of the edge part is shown.

[0045] Figure 4d-4e In perspective ( Figure 4d ) and the corresponding enlarged perspective view ( Figure 4e ) shows an embodiment of a separate tongue.

[0046] Figure 5a-5c In perspective ( Figure 5a )、Side view( Figure 5b ) and the corresponding enlarged perspective view ( Figure 5c ) shows an embodiment of a separate tongue.

[0047] Figure 5d-5e In side view ( Figure 5d ) and the corresponding enlarged side view ( Figure 5e ) shows an embodiment of a set of panels.

[0048] Figure 6a-6c In perspective ( Figure 6a )、Side view( Figure 6b ) and the corresponding enlarged perspective view ( Figure 6c ) shows an embodiment of a separate tongue and its cooperation with the second edge portion.

[0049] Figure 6d-6e An embodiment of a separate tongue is shown in a perspective view ( Figure 6d ), and an embodiment of two such separate tongues arranged in an insertion groove ( Figure 6e ).

[0050] Figures 7a-7f In side view ( Figure 7a , Figure 7c and Figure 7e ) and the corresponding enlarged side view ( Figure 7b , Figure 7d and Figure 7f ) shows an embodiment of the first and second edge portions during locking.

[0051] Figures 8a-8f In side view ( Figure 8a , Figure 8c and Figure 8e ) and the corresponding enlarged side view ( Figure 8b , Figure 8d and Figure 8f ) shows an embodiment of the first and second edge portions during locking or during unlocking.

[0052] Figure 9a-9b An embodiment of the first and second edge portions is shown in a side view during locking or during unlocking.

[0053] Figure 9c-9f In side view ( Fig.9c and Fig.9e ) and the corresponding enlarged side view ( Figure 9d and Figure 9f ) shows an embodiment of the first and second edge portions during locking or during unlocking.

[0054] Figure 10a-10b In cross-sectional side view C3-C3 and / or C4-C4 ( Fig.10a ) and C2-C2( Fig.10b ) in the form of a sectional side view showing, for example, Figure 1c-1d Embodiment of locked first and second edge portions of a center panel.

[0055] Figure 10c-10e An embodiment of the first and second edge portions during locking or unlocking is shown in a side view.

[0056] Figure 11a-11b Shows Fig.10e An enlarged side view of the edge of the Fig.11a ) and a perspective view of a single tongue therein ( Fig.11b ).

[0057] Fig.11c An embodiment of a separate tongue is shown in a perspective view.

[0058] Fig.11d An embodiment of an assembled wall panel is shown.

[0059] Figure 12a-12c An embodiment of a set of panels during disassembly is shown in perspective view ( Figure 12a-12b ) and embodiments of the lifting element ( Fig.12c ).

[0060] Fig.12dAn embodiment of interlocking third and fourth edge portions is shown in side view, the third and fourth edge portions being, for example, Figure 1e In or can be obtained from Figure 1e Get those edge parts.

[0061] Figures 13a-13d Take the sectional side view C2-C2( Fig.13a ) and C3-C3 and / or C4-C4( Fig.13b ) in the form of a side view ( Figure 13a-13b ) shows, for example, during unlocking using a separate tool Figure 1c-1d , and shows an embodiment of such a separate tool ( Fig.13c ) and its use ( Fig.13d ) perspective view.

[0062] Figure 14a-14b A number of different embodiments of a separate tongue in an unlocked state are shown in a top view.

[0063] Figure 14c-14d In perspective ( Fig.14c ) and an enlarged perspective view near its longitudinal end portion ( Fig.14d ) shows an embodiment of a separate tongue. DETAILED DESCRIPTION

[0064] In the following, reference will be made to e.g. Figure 1a-1e , Figure 2a-2f , Figure 3a-3d , Figure 4a-4e , Figure 5a-5e , Figure 6a-6e , Figures 7a-7f , Figures 8a-8f , Figures 9a-9f , Figure 10a-10e , Figures 11a-11d , Figures 12a-12d , Figures 13a-13d and Figures 14a-14d Various different embodiments of the present disclosure are described with reference to the embodiments in the accompanying drawings.

[0065] The present disclosure relates to a set of panels, such as building panels, comprising a first panel 1 and a second panel 2, the first panel 1 and the second panel 2 comprising a first edge portion 1a and a second edge portion 2b, respectively, see e.g. Figure 1a-1e and Figure 2a-2f Preferably, the panels here are substantially identical. For example, these panels can be floor panels, but for example Fig.11dThe wall panels shown, or ceiling panels or furniture components are likewise conceivable. The panels 1, 2 each comprise a front side 1e, 2e and a rear side 1f, 2f, which preferably extend along a first horizontal direction X and a second horizontal direction Y that are perpendicular to each other. For example, the first edge portion 1a and the second edge portion 2b may extend along the first horizontal direction X. A normal N to a main plane M1, M2 extending along the front side 1e, 2e and / or the rear side 1f, 2f defines a vertical direction Z extending away from the front side of the first panel 1 and the second panel 2.

[0066] The set of panels also includes a locking device for locking the first edge portion 1a and the second edge portion 2b to each other and obtaining a locked state. The locking device here can be a mechanical locking device. Therefore, the first panel 1 and the second panel 2 can be assembled to each other. The locking device includes a horizontal locking device and a vertical locking device, which are configured to define the horizontal locked state and the vertical locked state of the first edge portion 1a and the second edge portion 2b, respectively.

[0067] The panels 1, 2 here may be rectangular, but in some embodiments may also be square. Preferably, the first edge portion 1a and the second edge portion 2b on which the locking device is arranged are short edge portions. Obviously, the panels 1, 2 may include opposite short edge portions 1b, 2a, such as Figure 1a As shown. The panels 1, 2 may further comprise opposing third edge portions 1c, 2c and fourth edge portions 1d, 2d, which are preferably long edge portions. For example, the third and fourth edge portions may extend along the second horizontal direction Y. However, the present disclosure also covers, mutatis mutandis, embodiments in which the opposing edge portions 1a, 1b, 2a, 2b are long edge portions and the opposing edge portions 1c, 1d, 2c, 2d are short edge portions.

[0068] The set of panels may include additional panels, such as a plurality of panels. Figure 1e , Fig.12a and Fig.12d As shown, the set of panels may comprise a third panel 1 ' to which the panels 1 , 2 may be assembled, for example along the third edge portion 1c', the fourth edge portion 1d' and / or the first edge portion 1a'.

[0069] The panels 1, 2, such as floor panels, building panels, ceiling panels, furniture components or wall panels, may be configured to be arranged on or connected to an underlying structure such as a subfloor 20. In some embodiments, the panels 1, 2 are floor panels, which may be arranged on and along the subfloor 20, preferably in a floating manner. Figure 1e, the horizontal directions X, Y may extend parallel to the underlying structure, such as the underlying floor, and the vertical direction Z may extend perpendicular to the underlying structure. Fig.11d As shown, in the case of wall panels, the horizontal directions X, Y may extend along the visible wall surface 21 and are typically arranged perpendicular to the subfloor 20 in the environment in which the wall panels are assembled, and the vertical direction Z may extend perpendicular to the subfloor.

[0070] For example, Figure 1a-1e , Figure 2a-2f , Figure 4c , Figure 5d-5e , Figure 6e , Figures 7a-7f , Figures 8a-8f , Figures 9a-9f , Figure 10-10e and Fig.11a As shown, the vertical locking device comprises a separate tongue 3 arranged in an insertion groove 4 of a first edge portion 1a and a tongue groove 5 provided in the second edge portion 2b. The insertion groove, the separate tongue and the tongue groove may each have an elongated shape and may have a transverse extension and a preferably greater longitudinal extension. The longitudinal extension of the insertion groove 4 and the separate tongue 3 may extend along the first edge portion 1a, and the longitudinal extension of the tongue groove 5 may extend along the second edge portion 2b. For example, the edge portions 1a, 2b may extend along a first horizontal direction X. The cross section of the locking device may be substantially constant along the edge portions 1a, 2b, except possibly at corner portions 8a, 8b, 8c, 8d of the panels 1, 2.

[0071] The individual tongues 3 may comprise longitudinal end portions 3a and a locking portion 6. In some embodiments, for example Figure 1c , Figure 3a , Figure 4a , Figure 4d , Figure 5a , Figure 6a as well as Figure 11b-11c and Figures 14a-14d As shown, the locking portion 6 may be a longitudinal inner portion of the individual tongue, which is preferably arranged between a pair of longitudinal end portions 3a. For example, the locking portion 6 may be a longitudinal central portion of the individual tongue. However, for example Figure 1d and Figure 6d As shown, in some embodiments the locking portion 6 may extend to the opposite longitudinal end portion 3a, preferably without including the abutment member 13. The separate tongue 3 thus comprises an abutment member 13 arranged at one or both longitudinal end portions 3a. Furthermore, the second edge portion 2b comprises a stop surface 12.

[0072] In the vertical locked state, the abutment member 13 cooperates, e.g. engages, with the stop surface 12, and the locking portion 6 cooperates, e.g. engages, with the tongue groove 5. For example, the end portion 3i of the separate tongue 3 may cooperate with the tongue groove 5 at the locking surface 5g, see Figure 2d The locking surface 5g may be at an angle ε relative to the main plane M2 (for clarity, this is transferred parallel downward to Figure 2c-2d ). Preferably, 10°≤ε≤50°, more preferably, 25°≤ε≤40°. In addition, in the vertical locked state, the lower side 3j of the end portion 3i (preferably the lower side at the outermost side) may be at an angle σ relative to the main plane M1 and / or M2. Preferably, 0°≤σ≤25°, more preferably, 0°≤σ≤10°, for example, 3°≤σ≤7°.

[0073] In the vertical locked state, the distance D2 from the inner portion 4a (e.g. the innermost portion) of the insertion groove 4 to the stop surface 12 may be smaller than the distance D1 from the inner portion 4a (e.g. the innermost portion) to the locking surface 5g with which the separate tongue 3 (e.g. the outermost section of the end portion 3i) cooperates. The distances D1 and D2 may be measured along the second horizontal direction Y. In a number of non-limiting examples, the difference between D1-D2 may be 0.1-3.0 mm, preferably 0.3-0.9 mm.

[0074] The locking portion 6 of the separate tongue 3 may be flexible. In fact, it may be curved in the vertical locked state, for example, its outermost surface 3m is convex, which can be seen from Figure 1c , Figure 1d , Figure 4a and Figure 4c The outermost surface 3m can be marked in a top view of the first panel 1, for example. By the longitudinal bending, the transverse length TL of the locking part 6 from the insertion groove 4 in the transverse direction T of the individual tongue can be greater than the transverse length TE of the end part 3a from the insertion groove 4, see e.g. Figure 4c Alternatively or preferably additionally, the separate tongue 3 may be bent by longitudinal bending about a normal N to the main plane M1 and / or about an axis AP extending perpendicularly to the groove plane GP arranged along the inner wall 4c of the insertion groove 4, see Figure 1c-1e , Figure 2f , Figure 4c and Figure 5d The longitudinal curvature and / or the distances D1 , D2 may be measured by a CT scanner, preferably in a central plane parallel to the main planes M1 and / or M2 .

[0075] For example Figure 2a-2f , Figure 3a-3d , Figure 4c-4e , Figure 5a-5e , Figure 6a-6e , Figures 7a-7f , Figures 8a-8f , Figures 9a-9f and Figures 14a-14d As shown, the abutment member 13 may be arranged in a preferably laterally outer and lower part of the individual tongue 3. The abutment member 13 may for example protrude downwards from the tongue body part 3c. In a first example, it may be substantially formed as a hook or tooth 13b. In a second example, as shown Figure 6a-6c As shown, it may comprise at least two, for example three, teeth 13b.

[0076] The tongue body part 3c may comprise a continuous longitudinal outer section 3q, which preferably extends along substantially the entire longitudinal extension L of the individual tongue 3, see e.g. Figure 3a , Figure 4a , Figure 4d , Figure 5a , Figure 6a , Figure 6d , Figure 11b-11c and Figures 14a-14d .

[0077] For example Figures 10a-10e and Figures 11a-11c As shown, in some embodiments the abutment member 13 may be provided in a preferably laterally outer and upper part of the separate tongue 3 .

[0078] Furthermore, in the locked state, in some embodiments, the abutment member 13 may be disposed at or above a groove plane GP arranged along the inner wall 4c, see for example Figure 2f The inner wall 4c may be a wall located below in the vertical direction. In some embodiments, the abutment member 13 may be disposed at or below the groove plane GQ arranged along the opposite inner wall 4d of the insertion groove 4, see for example Fig.11a The inner wall 4d may be a wall located upward in the vertical direction. In any of these embodiments, during locking, the abutment member 13 may be displaced into the insertion groove 4.

[0079] In some embodiments, and for example Figure 2a-2f , Figure 3a-3d , Figure 4d-4e , Figure 5a-5e , Figure 6a-6e , Figures 7a-7f , Figures 8a-8f , Figure 9c-9f , Figures 10a-10e , Figure 11a-11b and Figure 14c-14dAs shown, a preferably transversely outer part of the separate tongue 3 may comprise a longitudinally extending cavity 3d. The cavity 3d may be arranged laterally behind the abutment member 13, for example at one or both longitudinal end portions 3a and may face downwards when the separate tongue 3 is arranged in the insertion groove 4. By means of the cavity, the thickness of the separate tongue, for example the outer thickness TS, and thus the thickness TG of the tongue groove 5 may be reduced. Furthermore, the weight and / or costs of the separate tongue may also be reduced. The cavity 3d may extend along substantially the entire longitudinal length LT of the separate tongue 3, for example to the longitudinal end portions 3a or to their longitudinal distal ends. However, in some embodiments, for example as Figure 5a-5c , Fig.11c and Figure 14c-14d As shown, the thickness TS, for example the thickness TS of the main tongue portion 3c, may be substantially constant at one or both longitudinal end portions 3a, for example without the cavity 3d. Such a separate tongue is easier to manufacture. Optionally, the locking portion 6 may comprise a cavity 3d, see Figure 5a-5c and Figure 14c-14d .

[0080] In some embodiments, for example, Figures 10a-10e and Figures 11a-11c In the embodiment, the outer part of the separate tongue 3 may comprise a longitudinally extending upper cavity 3n which is preferably arranged longitudinally inside the abutment member 13 .

[0081] The abutment member 13 may be flexible along the transverse extension T of the separate tongue 3. For example, the flexibility may be achieved by means of the cavity 3d. Thus, a simpler unlocking of the edge parts 1a, 2b may be achieved.

[0082] In some embodiments, the opposite longitudinal end portions 3a of the individual tongues 3 each comprise an abutment member 13, see e.g. Figure 1a-1c , Figure 2a-2f , Figure 3a-3d , Figure 4a-4e , Figure 5a-5c , Figure 6a-6c , Figures 7a-7f , Figures 8a-8f , Figures 9a-9f , Figures 10a-10e , Figures 11a-11c and Figures 14a-14c Thus, the edge portions 1a, 2b can be unlocked from either side. However, in some embodiments only a single longitudinal end portion 3a of a separate tongue 3 comprises an abutment member 13, see e.g. Figure 1b , Figure 1d , Figure 6d-6e , Figures 7a-7f , Figures 8a-8f , Figures 9a-9f , Figures 10a-10e and Fig.11aThus, the edge parts 1a, 2b are preferably unlockable from one side. It should be understood that any of these alternatives are equally conceivable here.

[0083] For example, the longitudinal length LA of the abutment member 13 (eg its longitudinal length along the longitudinal extension L of the individual tongue 3) may be 1-20 mm, preferably 5-10 mm or 1-6 mm, more preferably 3-6 mm, see Figure 3a-3b , Figure 4e and Figure 5c It should be noted that a greater longitudinal length LA may mean a reduced vertical locking strength, but a simpler unlocking. In general, the vertical locking strength must be high enough to obtain a functional locking device along the edge portion; at the same time, the vertical locking strength must be configured at least locally so that the edge portion can be unlocked.

[0084] The stop surface 12 may be arranged vertically below the tongue groove 5, for example Figure 2a-2b , Figure 2e-2f , Figure 5d-5e , Figure 6b , Figures 7a-7f , Figures 8a-8f and Figures 9a-9f Additionally or alternatively, the stop surface 12 may be arranged outside the opening 5a of the tenon groove 5. The opening 5a may extend horizontally to a vertical plane VS arranged along the stop surface 12, for example the innermost part of the stop surface, and optionally to a vertical plane VP arranged along the joined upper parts 1g, 2g of the edge parts 1a, 2b in the locked state, see for example Figure 2c , Figure 5d , Figure 7d-7e , Figure 9b and Figure 9d With regard to the second panel 2, the vertical plane VS may be arranged horizontally inside the vertical plane VP, see e.g. Figure 9b Optionally, the tongue groove 5, for example the opening 5a, may comprise at least one inclined surface 5b, see Figure 2b , Figure 2d and Figure 2f Therefore, the stop surface 12 may be provided outside the inclined surface. The inclined surface 5b may be located adjacent to the locking surface 5g and may be formed as a groove guide surface.

[0085] In some embodiments, for example, Figures 10a-10e and Fig.11a As shown, the stop surface 12 may be arranged in the upper part of the tenon groove 5 or vertically above the tenon groove 5. The stop surface 12 may be arranged at the opening 5a or outside the opening 5a. For example, the stop surface 12 may be part of the upper slope 5b of the tenon groove 5, see Figure 10a-10b and Fig.11a .

[0086] In any embodiment herein, the stop surface 12 may be an edge surface and may extend along the second edge portion 2b, preferably with a constant cross section along the second edge portion, see Figure 1e and Figure 12b In the vertical locked state, the locking portion 6 may be spaced apart from the stop surface 12, see e.g. Figure 2c-2d , Fig.10b and Fig.10e .

[0087] For example Figure 2b , Figure 2f , Figure 5e , Figure 7f , Figure 8b , Figure 9b and Figure 9d As shown, at least a portion of the stop surface 12, for example the entire stop surface, may be planar, preferably extending substantially vertically, for example extending vertically. By extending substantially vertically, the stop surface 12 may form an angle τ of 0°-10°, for example 0°-5° or 0°-2° relative to the normal N, see Figure 2a .

[0088] In e.g. Figures 10a-10e and Figures 11a-11c The stop surface 12 in the embodiment may be planar and inclined at an angle δ relative to the vertical direction Z, for example 0°≤δ≤45°, for example 10°≤δ≤30°. In some embodiments, a portion of the stop surface 12 may be planar and substantially vertical. For example, the stop surface 12 may be formed by a sharp corner section between a joining surface 2k of the second edge portion 2b and an upper wall 5h of the tongue groove 5, for example, the joining surface 2k and the upper wall 5h of the tongue groove 5 are arranged at approximately 90° relative to each other.

[0089] In some embodiments, for example, Figure 2b , Figure 2f , Figure 7f , Figure 8f , Figure 9b and Figure 9d As schematically shown in FIG. 1 , the abutment member 13 , for example its outer surface 13 a , in the locked state may extend substantially vertically, preferably substantially vertically relative to the vertical direction Z. This may provide for simpler unlocking, preferably in conjunction with a substantially vertical, for example vertical, stop surface 12 .

[0090] However, in some embodiments, for example Figure 5e and Figure 6bAs schematically shown in FIG. 1 , the abutment member 13, for example the outer surface 13a, in the locked state may preferably be inclined at an angle β relative to the vertical direction Z. In the first example, as Figure 6b As shown, the angle may be negative, so that the outer surface 13a is inclined inwardly at an angle β, and the range of the angle β is, for example, 0°<β≤10°, for example, 1°≤β≤5°. Figure 5e As shown, the angle may be positive, so that the outer surface 13a is inclined outwardly at an angle β, and the range of the angle β is, for example, 0°<β≤10°, such as 1°≤β≤5°.

[0091] Alternatively or additionally to the inclined abutment member 13, in some embodiments, the stop surface 12 may be inclined. Figure 5e and Figure 6b In the locked state, there may be a relative angle φ between the stop surface and the abutment member. A non-zero relative angle φ may provide for a simpler panel disassembly. For example, a negative relative angle φ may be: -10°≤φ<0°, e.g. -5°≤φ≤-1°. A positive relative angle φ may additionally provide for a greater bending of the individual tongues 3, whereby a smaller locking length of the individual tongues may be obtained, and for example a simpler unlocking. For example 0°<φ≤10°, e.g. 1°≤φ≤5°.

[0092] For example Figures 10a-10e and Figures 11a-11c The abutment member 13 in the embodiment may be planar and may be inclined at an angle θ, such as 0°≤θ≤45°, such as 10°≤θ≤30°, relative to the vertical direction Z in the locked state. For example, the shapes of the stop surface 12 and the outer surface 13a may substantially correspond to each other.

[0093] A pair of oppositely arranged displacement surfaces 3g, 3h of the separate tongue 3 may position the separate tongue vertically in the insertion groove 4, preferably by cooperating with inner walls 4c, 4d of the insertion groove. Furthermore, the displacement surfaces 3g, 3h may be configured to be displaced against the inner walls 4c, 4d during locking or unlocking, the displacement preferably being oriented along the transverse extension T of the separate tongue and / or along the groove plane GP or GQ.

[0094] The separate tongue 3 may comprise a flexible member 3b, such as a flexible leg, which is configured such that when the separate tongue is arranged in the insertion groove 4, the flexible member 3b faces the inner part 4a of the insertion groove 4. The flexible member 3b may bend between an inner position 3k and an outer position 3i of the insertion groove (see Figure 4b and Figure 14a-14bBE in the drawing), preferably bent in a tongue insertion direction and / or tongue displacement direction which may be parallel to a transverse extension T of the individual tongue. Thus, the individual tongue 3 may be displaced between an inner position and an outer position of the insertion groove. An inwardly directed pressure exerted on the individual tongue 3 during locking (see arrow B1 ) or during unlocking (see arrow B2) may displace it inwardly towards the inner position, and the flexible member 3b may be configured to displace it outwardly towards its outer position during locking (see arrow B1 ') or during unlocking (see arrow B2'), e.g. by means of a biasing / biasing force of the flexible member 3b. For example, the individual tongue may be compressed.

[0095] The individual tongue 3 may comprise a polymer-based material such as a thermoplastic material, for example PP, and optionally a reinforcing element such as glass fiber. For example, the individual tongue may be formed by injection molding. Optionally, the individual tongue may comprise at least one friction element 3f for preventing it from being displaced from the insertion groove 4. The friction element 3f may be shaped as a local protrusion arranged on one or more flexible members 3b, which preferably extends vertically outward from either or both of the displacement surfaces 3g, 3h. By the cooperation between the stop surface 12 and the abutment member 13, the individual tongue may be prevented from being displaced into the tongue groove 5 at one or both longitudinal end portions 3a. Preferably, the abutment member 13 is pretensioned against the stop surface 12 in the vertical locked state.

[0096] In some embodiments, Figure 1b , Figure 1d and Figure 6e As shown, at least two separate tongues 3, for example a plurality of separate tongues, may be arranged in the insertion groove 4. The plurality of separate tongues 3 may be arranged side by side along the first edge portion 1a, 2a, for example along the first horizontal direction X, and / or as shown. Figure 1b As shown, the first edge portions 1a, 2a are arranged side by side along the third edge portions 1c, 2c. For example, the first edge portions 1a, 2a can be short edge portions, but long edge portions are also conceivable. It should be noted that, for example, Figure 1b The locking means on the third edge portion 1c, 2c and on the fourth edge portion 1d, 2d in the embodiment may be similar to, for example, Figure 2a-2f The locking device on the first edge part 1a, 2a and the second edge part 1b, 2b is implemented.

[0097] A plurality of individual tongues 3 comprising an abutment member 13 at a single longitudinal end portion 3a may each be oriented in a similar manner in the insertion groove 4, e.g. with the abutment member 13 of each individual tongue being located at the same longitudinal end portion 3a, see Figure 6eThus, along the entire length of the first edge portion 1a each individual tongue can be suitably moved into and out of the insertion groove 4. Furthermore, the edge portions 1a, 2b can become unlockable.

[0098] A person skilled in the art will appreciate that in some embodiments at least two separate tongues 3 may be arranged side by side in the insertion groove 4, each separate tongue comprising an abutment member 13 at two opposite longitudinal end portions 3a. Figure 2a-2f , Figure 3a-3d , Figure 4a-4e , Figure 5a-5e , Figure 6a-6c , Figures 9a-9f , Figures 10a-10e , Figures 11a-11c and Figures 14a-14d Any individual tongue in the.

[0099] Here, generally, for example Figure 1a-1e , Figure 2a-2f , Figure 3a-3d , Figure 4a-4e , Figure 5a-5e , Figure 6a-6e , Figures 7a-7f , Figures 8a-8f , Figures 9a-9f , Figures 10a-10e , Figures 11a-11d , Figure 12a-12b and Figures 14a-14d In any of the above, the abutment member 13 of the separate tongue 3 may be arranged in the end section 11 of the first edge portion 1a, which end section 11 may be arranged adjacent to the third edge portion 1c, 2c, see Figure 1e , Figure 6e and Figure 12a-12b The end section 11 may be configured to be locked during a final phase of locking (see arrow A1 ) of the edge portions 1a , 2a and / or unlocked during an initial phase of unlocking (see arrow A2 ) of the edge portions 1a , 2a , preferably by means of a folding displacement.

[0100] exist Figure 1b , said longitudinal end portions 3a of the individual tongues 3 in the short edge portions 1a, 2a and the long edge portions 1c, 2c may comprise an abutment member 13 on one longitudinal end portion 3a. Preferably, the abutment member of the individual tongue in the long edge portion is adjacent to the corner portion 8a (see below) where the strips 8, 18 of the long edge portion and the short edge portion meet. Thus, the risk of accidental unlocking of the long edge portion, for example in its middle section, may be reduced. Furthermore, the abutment member of the individual tongue in the short edge portion is preferably adjacent to the corner portion 8a and / or is arranged in the end section 11. Optionally, the individual tongues 3 in the short edge portions 1a, 2a may also comprise an abutment member 13 on the opposite longitudinal end portion 3a (see Figure 1b The leftmost reference numeral 13).

[0101] In general here, the flexible members 3b may each extend from a respective base portion 3r of an individual tongue 3. Each flexible member may extend from a respective base portion 3r and may bend around the respective base portion 3r. Figure 14a-14b As shown, the flexible member 3b extending from the base part 3r arranged at the longitudinal end part 3a may extend from the longitudinal inner side 3u of said base part 3r and may be bent around the longitudinal inner side 3u of said base part 3r. The inner side 3u may be the area of ​​the base part 3r which faces away from the nearest longitudinal outermost edge 3v of the separate tongue. In other words, the end section 3t of the flexible member 3b may be oriented towards the longitudinal central part of the separate tongue 3. Therefore, unlocking starting from this longitudinal end part 3a is preferred.

[0102] like Fig.14a As shown, the flexible members 3b may all be oriented in the same direction, for example, such that they all extend from the same longitudinal side of the base portion 3r, such as the inner side 3u or the outer side 3w. Fig.14b It is shown that in some embodiments, the flexible member 3b extending from the base portion 3r arranged at the corresponding longitudinal end portion 3a can extend from the longitudinal inner side 3u of the base portion 3r and can be bent around the longitudinal inner side 3u of the base portion 3r. Therefore, unlocking from either of the two longitudinal end portions 3a is equally preferred. Fig.14b As shown, the flexible members 3b can be grouped into two groups S1, S2, which are oppositely oriented, for example, so that they extend from opposite longitudinal sides, such as the inner side 3u, of the base portion 3r of the respective groups S1, S2. For example, the distance DF from the longitudinal outermost edge to the flexible member 3b, such as to the end section 3t, can be 5-30 mm, such as 10-20 mm.

[0103] In some embodiments, the abutment member 13 may be arranged at least partially on the longitudinal outside of the flexible member 3b, see e.g. Figure 14c-14d For example, the abutment member 13 may be arranged completely / entirely longitudinally outside the flexible member 3b. The separate tongue 3 preferably comprises a supporting member 3s arranged longitudinally outside the flexible member 3b. The supporting member 3s may cooperate with the inner part 4a during locking.

[0104] In some embodiments, the first edge portion 1a may include an auxiliary groove 4b for accommodating at least a portion of the abutment member 13 during locking, see Figure 9a-9bThe auxiliary groove 4b may be located below the opening 4e of the insertion groove 4 and may extend along the first edge portion 1a at least where the abutment member 13 is located, for example along the entire first edge portion. In the locked state, the abutment member 13 may therefore be at least partially, for example completely, arranged below the groove plane GP, see for example Figure 9a The insertion groove may be arranged above the groove plane GP. Therefore, during locking, the abutment member 13 may be displaced outside the insertion groove 4.

[0105] In any of the embodiments herein, for example in Figure 1a-1e , Figure 2a-2f , Figure 4c , Figure 5d-5e , Figure 6e , Figures 7a-7f , Figures 8a-8f , Figures 9a-9f , Figures 10a-10e , Fig.11a , Fig.11d , Figure 12a-12b and Figures 14a-14d In any of the embodiments, the first edge portion 1a may include a strip 8 extending horizontally outward from a lower portion thereof, for example, extending along a second horizontal direction Y. The horizontal locking device may include a locking element 7 arranged on the strip 8 and preferably extending upward, and a locking groove 9 provided in the second edge portion 2b. The locking element 7 may be configured to cooperate with, for example, engage with, the locking groove 9 to provide a horizontally locked state of the first edge portion 1a and the second edge portion 2b. For example, the inner portion 7a of the locking element 7 and the outer portion 9a of the locking groove 9 together with the engaged upper portions 1g, 2g may jointly lock the edge portions 1a, 2b in two opposite horizontal directions, for example, to lock the edge portions 1a, 2b along the second horizontal direction Y, see Figure 2e .

[0106] In some embodiments, for example, Figure 2a-2f , Figures 7a-7f , Figures 8a-8f , Figures 9a-9f , Figures 10a-10e and Fig.11a As shown, the inner walls 4c, 4d of the insertion groove 4 may extend substantially horizontally, for example substantially parallel to the main plane M1. This is preferred for thicker panels such as floor panels, for example having a thickness TP of at least 10 mm, preferably 10-25 mm, more preferably 12-16 mm.

[0107] In some embodiments, for example, Figure 5d-5e As shown, the insertion groove 4 can be inclined at an angle γ. The angle γ can be defined as the inclination of the groove plane GP relative to the main plane M1 (for clarity, it is translated downward to Figure 5d). For example, the angle γ may be less than 20°, preferably 5-15°, for example 10°. This is preferred for thinner panels such as laminate floor panels, for example having a thickness of not more than 10 mm, for example 8-10 mm.

[0108] Those skilled in the art will appreciate that the above embodiments are exemplary and any embodiments of the insertion grooves having angles γ=0 and γ>0 in the previous two paragraphs, respectively, are interchangeable.

[0109] For example Figure 9c-9f As shown, the second edge portion 2b may comprise a recess 5c for accommodating the abutment portion 13 in the locked state. The stop surface 12 may be provided as a recess inner surface 5d and / or a recess lower surface 5e. Preferably, the recess 5c is arranged below the tongue groove 5. The second edge portion 2b may further comprise a protrusion 5f arranged below the recess 5c. The recess and / or the protrusion may extend along substantially the entire second edge portion, preferably with a constant cross section along substantially the entire second edge portion. By means of the recess and / or the protrusion, a simpler panel disassembly may be provided. In particular, a faster displacement of the individual tongues 3 into the insertion groove 4 may be allowed. Furthermore, the displacement may be better controlled. Preferably, the recess inner surface 5d and / or the recess lower surface 5e are planar. For example, the recess inner surface 5d may extend substantially vertically, for example at 0°-10°, preferably at 0°-5°. The recessed portion lower surface 5 e may extend at an angle α relative to the vertical direction Z, 10°<α≤45°, preferably 10°≤α≤30°.

[0110] In some embodiments, the joined upper portions 1g, 2g may overlap horizontally. Figure 5d-5e As shown, the second edge portion 2b may extend above the first edge portion 1a. For example, the first edge portion 1a and the second edge portion 2b may include a boss portion 1i and an overlapping portion 2i, respectively, which cooperate with each other, such as engaging, in the locked state. Figure 5d-5e In the embodiment of FIG. 5 , the vertical plane VP may extend along the joined upper portions 1g, 2g of the edge portions 1a, 2b, and it may be disposed along the horizontal outermost surface of the upper portion 1g, such as the boss portion 1i.

[0111] The first edge portion 1a and the second edge portion 2b may be configured to be vertically locked to each other by a relative vertical displacement A1 of the first edge portion and the second edge portion towards each other (e.g. displacing the second edge portion against the first edge portion). The relative vertical displacement A1 preferably comprises a folding displacement, or equivalently a scissor-like displacement (e.g. a so-called downward folding), whereby the second edge portion is gradually vertically displaced towards the first edge portion, see e.g. Figure 1e , Figures 7a-7f , Figures 8a-8f , Figures 9a-9f and Figure 10c-10e (See arrow A1, from Figures 8a-8f and Figure 9c-9f ). By means of the folding displacement, a separate tongue 3, for example the locking part 6, can be gradually inserted into the insertion groove 4 along the first edge part 1a in a first stage and gradually inserted into the tongue groove 5 along the second edge part 2b in a subsequent second stage. Obviously, the relative vertical displacement A1 can also lock the edge parts 1a, 2b horizontally, for example by means of cooperating locking elements 7 and locking grooves 9.

[0112] During locking, the second edge portion 2b, preferably the lower mating surface 2j, may cooperate, preferably directly, with the outer mating surface 3e of the separate tongue 3 for displacing the separate tongue into the insertion groove 4, see e.g. Figures 7a-7f , Figures 8a-8f , Figure 9c-9f and Figure 10c-10e (See arrow A1). For example, during locking, the second edge portion 2b, preferably the lower mating surface 2j, may cooperate with the locking portion 6, preferably directly therewith, for displacing the individual tongue 3 into the insertion groove 4. The abutment member 13 and the locking portion 6 may be operatively coupled such that during locking, the locking portion 6 is pushed in the direction towards the inner portion 4a by the second edge portion 2b, causing the abutment member to be displaced together with the locking portion in the direction towards the inner portion 4a. The lower mating surface 2j and the outer mating surface 3e may be inclined, preferably with substantially corresponding inclinations. For example, the outer mating surface 3e may be arranged in the longitudinal outer section 3q. Furthermore, the outer mating surface 3e preferably extends along substantially the entire longitudinal extension length L. Optionally, the outer mating surface 3e may be chamfered at the longitudinal end portion 3a to form a chamfer 3p. Preferably, such a chamfer 3p may cooperate with the second edge portion 2b during locking for gradually inserting the individual tongue 3 into the insertion groove. The longitudinal end portion 3a may comprise a longitudinal curved section 3x, seen from a top view and / or a bottom view of the individual tongue 3. A chamfer 3p may be arranged in the curved section 3x.

[0113] During locking, preferably during the first and second stages and / or between the first and second stages, at least one selected from the group consisting of the stop surface 12, the bevel 5b, the recess inner surface 5d, the recess lower surface 5e and the protrusion 5f can cooperate with the separate tongue 3, for example with the end portion 3i and / or the abutment member 13.

[0114] In any embodiment herein, the abutment member 13 may include a straight portion extending parallel to the longitudinal extension L, which may optionally be completely straight, see e.g. Figure 3a-3b , Figure 4a-4e, Figure 5a-5c , Figure 6a-6e , Figure 11b-11c and Figures 14a-14d Preferably, the straight portion is arranged on the longitudinal inner side of the longitudinal curved section 3x and / or the chamfer 3p.

[0115] During the relative vertical displacement A1, preferably during the folding displacement, the pair of third edge portions 1c, 1c', 2c and the fourth edge portion 1d, 2d can be configured to lock with each other by relative angular displacement of the third and fourth edge portions against each other, for example by the third edge portion being rotated against the fourth edge portion by an angle, see Figure 1e The edge parts 1c, 1c', 2c, 1d, 2d may be locked to each other vertically and horizontally, for example, by means of locking means integrally formed with the core of the panels 1, 1', 2. For example, the edge parts may be interlocked by means of cooperating tongues 14 and tongue grooves 15 and the cooperation of locking elements 17 provided on the strips 18 with locking grooves 19, see for example Fig.12d Alternatively, these edge portions may be similar to the embodiments related to the first edge portions 1a, 2a and the second edge portions 1b, 2b described herein (e.g. Figure 2a-2f , Figure 5d-5e , Figure 6e , Figures 7a-7f , Figures 8a-8f , Figures 9a-9f , Figures 10a-10e and Fig.11a For example, a locking device on the third edge portion 1c, 2c and the fourth edge portion 1d, 2d may be used, which comprises one or more separate tongues 3, such as Figure 1b For other embodiments of edge portions 1c, 1c', 2c, 1d, 2d, we refer to, for example, pages 2, lines 13-22 and Figure 1a-1e and Figure 2a-2e , the contents of which are expressly incorporated herein by reference.

[0116] The first edge portion 1a and the second edge portion 2b may be configured to be vertically unlocked by a relative vertical displacement A2 of the first edge portion and the second edge portion away from each other, preferably by means of a folding displacement, see e.g. Figure 1e , Figures 8a-8f , Figure 9e-9f and Figure 12a-12b Alternatively or additionally, the first edge portion 1a and the second edge portion 2b may be configured to be vertically unlocked by repeated relative vertical displacement A2' of the first edge portion and the second edge portion away from and towards each other, see e.g. Figure 1e , Figures 8a-8f , Figure 9c-9f and Figure 12a-12c (See arrows A2, A2', from Figures 8a-8f and Figure 9c-9f ). By means of the folding displacement, a separate tongue 3, for example the locking part 6, can be gradually moved out of the tongue groove 5 along the second edge part 2b and gradually inserted into the insertion groove 4 along the first edge part 1a. Thus, the edge parts 1a, 2b can be gradually unlocked from each other. Similar to the above discussion, the relative vertical displacement A2, A2' can also unlock the edge parts 1a, 2b horizontally, for example by disengaging the locking element 7 from the locking groove 9. By unlocking the edge parts 1a, 2b, the first panel 1 and the second panel 2 can be detached from each other.

[0117] During unlocking, the second edge portion 2b may cooperate with the separate tongue 3, for example the locking portion 6, for displacing the separate tongue into the insertion groove 4, see for example Figures 8a-8f and Figure 9c-9f (See arrow A2 ). For example, at least one selected from the group consisting of the stop surface 12 , the chamfer 5 b , the recess inner surface 5 d , the recess lower surface 5 e and the protrusion 5 f may cooperate with a separate tongue, such as the end portion 3 i and / or the abutment member 13 .

[0118] In some embodiments, Figure 12a-12c As shown, unlocking can be achieved with the aid of a lifting element 16. The lifting element 16 may include a wedge-shaped portion 16a and a preferably inclined support portion 16b, see Fig.12c . This type of unlocking is particularly suitable in the following situation: the panels 1, 2 are arranged on a subfloor 20, which is preferably essentially horizontal or flat. For example, the assembled first panel 1 and the second panel 2 can be lifted or angled together along the third edge portion 1c, 2c, for example by inserting a lifting element 16 between the rear side 2f of the second panel 2 and the subfloor 20. For example, the lifting element 16 can be gradually displaced below the rear side 2f and the assembled panels 1, 2 can be gradually lifted in the vertical direction with the help of the wedge-shaped portion 16a. When inserted, the rear side 2f can thus rest on the supporting portion 16b. Thereafter, a force F can be applied to the front side 1e of the first panel 1, whereby the first edge portion 1a and the second edge portion 2b can be relatively vertically displaced A2 away from each other and vertical unlocking can thus be obtained, see Figure 12b By applying a greater force F, unlocking can be made faster.

[0119] In some embodiments, Figures 13a-13d As shown, a separate tool 22, such as an elongated rod, can be used to unlock the edge parts 1a, 2b and thus remove the panels 1, 2. This unlocking is particularly useful for Figure 10c-10e The embodiments in are preferred, such as Fig.10e 2a and 2b , as shown by dashed lines in FIG. 2 (see arrows A2 or A2'). Preferably, the separate tool 22 comprises a cylindrical end portion 23, e.g. having a cylindrical cross section along its entire length, but other geometries are possible. In a number of non-limiting embodiments, the thickness TT of the separate tool may be 0.5-2.0 mm, preferably 0.8-1.5 mm, e.g. 1.1 mm. The separate tool 22 may be inserted into the tongue groove 5 (see arrow AW) such that the separate tongue 3, e.g. the locking portion 6, may be gradually moved out of the tongue groove 5 along the second edge portion 2b and gradually inserted into the insertion groove 4 along the first edge portion 1a. Thus, the edge portions 1a, 2b may gradually unlock each other.

[0120] Other unlocking methods are also conceivable, in particular, WO 2022 / 197234 A1, page 18, line 22 to page 21, line 10 and FIG. 13, Figures 14a-14d , those described in Figures 15a-15b and Figures 16a-16b, the contents of which are expressly incorporated herein by reference.

[0121] During locking and / or during unlocking, the individual tongues 3 may be straightened at least partially, for example substantially completely, along their longitudinal extension, see Figure 4a For example, the outermost surface 3m of the individual tongue, preferably at least at the locking portion 6, may be straightened when the individual tongue is displaced into the insertion groove 4. Preferably, it is straightened from a convex shape (see curve Q) to a less convex shape (see curve Q'), such as being substantially straight, such as any local portion of the outermost surface 3m forms a maximum angle of 0°-10°, preferably 0°-5°, more preferably 0°-2° with respect to the inner portion 4a, or is completely straight, i.e. 0° (see curve S). For example, the outermost surface 3m may be marked in a top view of the individual tongue 3 and / or the first panel 1.

[0122] When at least one separate tongue 3 is provided along the short edge portions 1a, 2a (e.g. Figure 1a ), the short edge portions can be locked or unlocked by folding, and the long edge portions comprising an integrally formed locking device can be locked or unlocked by turning an angle. When at least one separate tongue 3 is provided along the short edge portions 1a, 2a and at least one separate tongue 3 is provided along the long edge portions 1c, 2c (e.g. Figure 1b The short edge portion or the long edge portion can be locked or unlocked by rotating an angle and / or folding.

[0123] The present disclosure has been basically described above with reference to several embodiments. However, as will be readily appreciated by those skilled in the art, other embodiments than those disclosed above are equally possible within the scope of the present disclosure. For example, it is clear that Figure 2a-2f , Figure 4c , Figure 5d-5e , Figures 7a-7f , Figures 8a-8f , Figures 9a-9f , Figures 10a-10e and Fig.11a Any of the embodiments of the present invention can be implemented as follows Figure 1c or the locked state in 1d, wherein appropriate modifications are made depending on whether the individual tongues 3 comprise a single abutment member 13 or two abutment members at two opposite longitudinal end portions 3a. Furthermore, it is emphasized that any panel 1, 2, 1' herein may comprise any one or a combination of the above-mentioned core materials and / or any one or a combination of the above-mentioned layers, as indicated at the end of the invention summary of this document, to which reference is hereby made. Finally, it is clear that any folding displacement described herein, such as the folding displacement of the edge portions 1a, 2b, may be achieved by an angular rotation of an adjacent edge portion, such as the third edge portion 2c, see Figure 1e and Figure 12a-12c .

Claims

1. A set of panels, such as building panels, comprising a first panel (1) and a second panel (2), and locking means for locking a first edge portion (1a) of the first panel to a second edge portion (2b) of the second panel, wherein the panels comprise a front side (1e; 2e) and a rear side (1f; 2f), a normal (N) to a main plane (M1; M2) extending along the front side and / or the rear side defining a vertical direction (Z), the vertical direction extending away from the front side (1e; 2e) of the first panel (1) and the second panel (2), wherein the locking means comprise horizontal locking means and vertical locking means, the vertical locking means comprising: a separate tongue (3) arranged in an insertion groove (4) of the first edge portion (1a), wherein a longitudinal extension (L) of the separate tongue (3) extends along the first edge portion (1a); as well as a tongue groove (5) provided in and extending along said second edge portion (2b), Wherein, in the vertical locking state of the first edge portion (1a) and the second edge portion (2b): an abutment member (13) provided at a longitudinal end portion (3a) of the separate tongue (3) cooperates with a stop surface (12) of the second edge portion (2b), the stop surface (12) being planar and extending substantially vertically, and The locking portion (6) of the separate tongue (3) cooperates with the tongue groove (5), During locking, the locking portion (6) is configured to be gradually inserted into the insertion groove (4) along the first edge portion (1a) in a first stage, and the locking portion (6) is configured to be gradually inserted into the tenon groove (5) along the second edge portion (2b) in a subsequent second stage.

2. A set of panels according to claim 1, wherein: The abutment member (13) is arranged in an outer lower part of the separate tongue (3).

3. A set of panels according to claim 1 or 2, wherein: The abutment member (13) protrudes downward.

4. A set of panels according to any one of the preceding claims, wherein: The abutment member (13) is one of at least two abutment members (13), wherein two opposite longitudinal end portions (3a) of the separate tongue (3) each comprise a respective one of the at least two abutment members (13).

5. A set of panels according to any one of the preceding claims, wherein: The first edge portion (1a) of the first panel and the second edge portion (2b) of the second panel are short edge portions shorter than the long edge portions.

6. A set of panels according to any one of the preceding claims, wherein: The stop surface (12) is arranged below the tenon groove (5).

7. A set of panels according to any one of the preceding claims, wherein: The stop surface (12) is arranged outside the opening (5a) of the tenon groove (5).

8. A set of panels according to any one of the preceding claims, wherein: In the vertical locked state, the locking portion (6) of the separate tongue (3) is spaced apart from the stop surface (12).

9. A set of panels according to any one of the preceding claims, wherein: In the vertical locked state, the abutment member (13) is pretensioned against the stop surface (12).

10. A set of panels according to any one of the preceding claims, wherein: The separate tongue (3) comprises a flexible member (3b) which is configured to face an inner portion (4a) of the insertion groove (4) when the separate tongue (3) is arranged in the insertion groove (4), the flexible member (3b) being configured to displace the separate tongue (3) outwards during locking or unlocking.

11. A set of panels according to claim 10, wherein: The flexible members (3b) each extend from a corresponding base portion (3r) of the individual tongues (3), and the flexible members (3b) extending from the base portion (3r) arranged at the longitudinal end portion (3a) extend from a longitudinal inner side (3u) of the base portion (3r) and are bendable around the longitudinal inner side (3u).

12. A set of panels according to claim 10 or 11, wherein: The abutment member (13) is at least partially arranged on the longitudinal outside of the flexible member (3b).

13. A set of panels according to any one of the preceding claims, wherein: In the vertical locked state, the locking portion (6) of the separate tongue (3) is bent in the longitudinal direction.

14. A set of panels according to any one of the preceding claims, wherein: The horizontal locking device includes a locking element (7) arranged on a strip (8) extending horizontally outward from the lower part of the first edge portion (1a), and a locking groove (9) provided in the second edge portion (2b), wherein the locking element (7) and the locking groove (9) are configured to cooperate to provide a horizontal locking state of the first edge portion (1a) and the second edge portion (2b).

15. A set of panels according to any one of the preceding claims, wherein: The first edge portion (1a) and the second edge portion (2b) are configured to be vertically unlocked by forced relative vertical displacement of the first edge portion and the second edge portion away from each other and / or by repeated forced relative vertical displacement of the first edge portion and the second edge portion away from and toward each other.

16. A set of panels according to any one of the preceding claims, wherein: During locking, the second edge portion (2b) cooperates with the locking portion (6) to displace the separate tongue (3) into the insertion groove (4).

17. A set of panels according to any one of the preceding claims, wherein: The abutment member (13) and the locking portion (6) of the separate tongue (3) are operatively connected so that during locking, the locking portion (6) is pushed in a direction toward an inner portion (4a) of the insertion groove (4) by the second edge portion (2b), thereby causing the abutment member (13) to move together with the locking portion (6) in a direction toward the inner portion (4a) of the insertion groove (4).

18. A set of panels according to any one of the preceding claims, wherein: The abutment member (13) comprises a straight portion extending parallel to the longitudinal extension (L) of the separate tongue (3).

19. A set of panels according to claim 18, wherein The straight portion is arranged longitudinally inside the longitudinal curved section (3x) located in one or more longitudinal end portions (3a).

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