FIELD OF INVENTION

The present invention pertains to arrangements for covering a staircase, in particular a cover member, such as a panel or a profile for covering at least a portion of a stair of a stair case, more in particular a stair nose cover member.

BACKGROUND OF INVENTION

Staircases are common installations and typically constructed in wood, stone or concrete. Further, staircases are typically custom built for the specific location and may thus be expensive and complicated to replace should there be a need or desire to replace the staircase. Thus, complete replacement of a staircase is typically avoided. Instead, for example, in such cases when it is desired to change the appearance of a staircase, it is common to for example apply paint to the stairs of the staircase.

Wear of the stairs of a staircase may according to known systems be at least to some extent prevented by arranging a fabric, such as a textile carpet, along the staircase. A carpet may also render the properties of a staircase: a concrete staircase may for example become softer. Wear of the stairs of a staircase may reduce the surface roughness of the material and the stairs may thus become slippery and pose a hazard to users.

According to some known systems, adhesive friction imparting strips may be adhered on the stairs or adjacent to the stair nose of the stairs. In other known systems, friction imparting profiles may be arranged on an edge of the stair nose to prevent slipping.

As such, known systems fail to provide a versatile system for protecting and/or adapting the properties of a staircase to desired properties.

SUMMARY It is an object of the present invention to provide a system for covering at least part of a staircase.

It is a further object to provide a system which allows the user to change the appearance and/or properties of a staircase.

It is a yet further object to provide a system which allows a floating floor to merge with a staircase, for example by facilitating that a staircase may be covered with building panels, such as floor panels, having an appearance similar or essentially identical to that of an adjacent floor, such as a floating floor. It is a still further object to provide a system which facilitate that a staircase may be covered with floor panels.

It is a further object to provide a system for covering a staircase which facilitates that an essentially continuous surface is obtained along the extension of the staircase, for example from a floating floor of a ground floor to a floating floor on a first upper floor.

It is a further object to provide a system for covering a staircase which is easy to install.

At least some of these objects have now been achieved by a first aspect where there is provided a stair nose cover member, such as a profile or panel, the cover member comprising a first edge, such as a long edge, comprising a mechanical locking system configured to cooperate with a mechanical locking system of a first edge of an adjacent first panel for horizontal and vertical locking of the cover member to the first panel. The cover member may comprise a second edge comprising a mechanical locking system configured to cooperate with a mechanical locking system of a first edge of an adjacent second panel for horizontal and vertical locking of the cover member to the second panel. The cover member may be configured such that in assembled position of the cover member with the first panel and the second panel, a front surface of the first panel extends in a first plane, such as one of a horizontal or vertical plane, and a front surface of the second panel extends in a second plane being essentially perpendicular, preferably perpendicular the first plane, such as the other of a horizontal or vertical plane.

The arrangement may bring about the technical advantage that building panels, such as floor panels, may be used to cover at least part of the staircase, such as a stair and a stair nose.

The second and/or second panel may be building panels, such as floor panels comprising a mechanical locking system configured for assembling the panels with adjacent similar essentially identical panels to form a floor. In particular, the arrangement may bring about the advantage that a mechanical locking system of the first and second panels may be utilized to provide a floating cover for at least a portion of a staircase and thus provide a visually essentially continuous surface from a first upper stair to a second lower stair of a staircase. Consequently, the arrangement may facilitate that a flush surface is obtained along a staircase. Additionally, the arrangement may facilitate that a continuous flush surface extending from a floating floor and along a staircase.

By utilizing the inherent mechanical locking system of the first and second panels, simple assembling may be facilitated.

By stair nose it is generally meant an outer portion of edge of a stair of a staircase.

In some embodiments the cover member and/or one or more of the first panel and the second panel may be adhered to the stair.

In a second aspect, there is provided a set comprising the cover member, the first panel and preferably the second panel according to any embodiment of the first aspect.

In any embodiment, the set may preferably be configured to be assembled independent the stair nose and independent the stair or staircase. For example, the set may be assembled independently and subsequently arranged on the staircase or a portion of the staircase, such as on the stair nose. Thereby, flexibility and compatibility of the set are facilitated while that the set may be arranged on virtually any type of staircase. Preferred embodiments are set forth in the appended dependent claims, the detailed description and the item section.

It should be appreciated that any of the aspects disclosed herein may equally be applied to cover any building element, such as an edge or corner of a wall or ceiling, a column or a pillar. The first and second panels may thus be wall panels. Accordingly, according to a third aspect, there is provided a cover member, such as a profile or panel, the cover member being configured to cover at least a portion of an edge or a corner, such as a right-angle edge of a stair nose, a wall or a ceiling, the cover member comprising a first edge, such as a long edge, comprising a mechanical locking system configured to cooperate with a mechanical locking system of a first edge of an adjacent first panel for horizontal and vertical locking of the cover member to the first panel. The cover member may comprise a second edge comprising a mechanical locking system configured to cooperate with a mechanical locking system of a first edge of an adjacent second panel for horizontal and vertical locking of the cover member to the second panel. The cover member may be configured such that in assembled position of the cover member with the first panel and the second panel, a front surface of the first panel extends in a first plane, such as one of a horizontal or vertical plane, and a front surface of the second panel extends in a second plane being essentially perpendicular, preferably perpendicular the first plane, such as the other of a horizontal or vertical plane. The embodiments of the first aspect are combinable with the third aspect unless stated otherwise. It has been contemplated that one or more of the first edge and the second edge of the cover member comprises the locking tongue and the adjacent first edge of the first panel and/or second panel comprises the tongue groove.

Accordingly, in a fourth aspect, there is provided the cover member such as a profile or panel, the cover member being configured to cover at least a portion of an edge or a corner, such as a right-angle edge of a stair nose, a wall or a ceiling, the cover member comprising a first edge, such as a long edge, comprising a mechanical locking system configured to cooperate with a mechanical locking system of a first edge of an adjacent first panel for horizontal and vertical locking of the cover member to the first panel. The cover member may comprise a second edge comprising a mechanical locking system configured to cooperate with a mechanical locking system of a first edge of an adjacent second panel for horizontal and vertical locking of the cover member to the second panel. The cover member may be configured such that in assembled position of the cover member with the first panel and the second panel, a front surface of the first panel extends in a first plane, such as one of a horizontal or vertical plane, and a front surface of the second panel extends in a second plane being essentially perpendicular, preferably perpendicular the first plane, such as the other of a horizontal or vertical plane. One of the first edge of the cover member or the first edge of the first panel comprises a tongue groove configured to open in a direction parallel the first plane in assembled position of the cover member and the first panel, said tongue groove configured to receive a locking tongue of the other of the first edge of the first panel or the first edge of the cover member, for locking of the cover member from being displaced along the second plane, such as along a horizontal plane or along a vertical plane. The said one of the first edge of the cover member or the first edge of the first panel which comprises the tongue groove may comprise a locking element configured to project in a direction perpendicular the first plane in assembled position of the cover member and the first panel. The locking element may be configured to be received in a locking groove of the other of the first edge of the first panel and the first edge of the first panel by means of said folding displacement or linear translation for locking of the cover member and the first panel from parting away from each other in a direction along the first panel. The locking groove preferably being open in a direction along the second plane in the assembled state of the cover member and the first panel, such as open towards the stair nose. BRIEF DESCRIPTION OF DRAWINGS

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

FIG.1 A shows a perspective view of a stair of a stair case and a cover member according to an embodiment in assembled position with a first and a second panel.

FIG.1 B shows an alternative view of a stair of a stair case and a cover member according to the embodiment of FIG.1 A.

FIG.2 shows a cross-sectional view of a cover member according to the embodiment of FIG.1A in assembled position with a first panel.

FIG.3 is a schematic illustration of a cover member according to the embodiment of FIG.1A being configured in in assembled position by means of a folding displacement.

FIG.4 is a schematic illustration of a cover member according to the embodiment of FIG.1A being configured in in assembled position by means of a linear translation.

FIG.5A shows a cross-sectional view of a cover member according to a further embodiment.

FIG.5B shows a resilient strip according to an embodiment. FIG.6 shows a cover member according to a still further embodiment.

FIG.7A shows a cover member according to another embodiment configured in assembled position with a first panel and a second panel.

FIG.7B is another view of the cover member of FIG.7A.

FIG.8 is an alternative arrangement of the embodiment of FIG.7A. FIG.9 shows a set according to an embodiment.

DETAILED DESCRIPTION

Referring to FIGS.1A-1 B, there is shown a stair nose 6 cover member according to an embodiment. FIGS 1 A, 1 B shows exemplary ways of installing the cover member. In FIG.1 A, the cover member 10 is configured to cover at least a portion of a stair or stair nose, for example an outermost portion extending vertically. FIG.1 B shows the embodiment of FIG.1 A in an exemplary alternative orientation where the cover member rests on top of the stair 5 of the staircase. A first panel may be arranged on an upper surface of the stair. FIG.1A and FIG.1 B also shows an exemplary embodiment of the second aspect of the disclosure; a set 2 comprising the cover member 10 and the first panel 20, optionally also the second panel 30.

FIG.1 A shows the cover member being configured in assembled position and thus locking state with the first panel 20.

The cover member, the first panel and the second panel may respectively comprise a front surface 15, 15’, 15” and a back surface 16, 16’, 16”. The front surfaces may be a proximal surface intended to be a visible surface. The front surface may comprise a decorative layer, such as a veneer or a print, such as a printed paper or printed powder. The back surface may be a distal surface and may comprise a backing layer.

As derivable i. a. from FIG.1 A, FIG.1 B, FIG.7A and FIG.8, the outer surface of the cover member may be flush with the front surface 15’ of the first panel 20 and flush with the front surface 15” of the second panel 30, thereby providing a visually continuous surface from a first upper stair to a second lower stair, or vice versa.

Referring to FIG.2, A stair nose cover member 10, such as a profile or panel, the cover member comprising a first edge 11 , such as a long edge, comprising a mechanical locking system configured to cooperate with a mechanical locking system of a first edge 21 of an adjacent first panel 20 for horizontal and vertical locking of the cover member 10 to the first panel 20.

A second edge 12, such as an opposite long edge may preferably comprise a mechanical locking system configured to cooperate with a mechanical locking system of a first edge 31 of an adjacent second panel 30 for horizontal and vertical locking of the cover member to the second panel 30.

The cover member may be configured such that in assembled position of the cover member with the first panel and the second panel, a front surface 15’ of the first panel extends in a first plane P1 , such as one of a horizontal H or vertical V plane, and a front surface 15” of the second panel extends in a second plane P2 being essentially perpendicular, preferably perpendicular the first plane P1 , such as the other of a horizontal or vertical plane.

For example, in FIG.1A the front surface 15’ of the first panel in arranged is a horizontal H plane, the first plane P1 being parallel the horizontal H plane. The front surface 15” of the second panel 30 being arranged in a vertical V plane, the second plane P2 being parallel the vertical V plane. Alternatively, as shown in FIG.1 B, the front surface 15’ of the first panel is arranged in a vertical V plane, the first plane P1 being parallel the vertical V plane. The front surface 15” of the second panel 30 being arranged in a horizontal H plane, the second plane P2 being parallel the horizontal H plane.

Thus, a front surface 15 of the cover member may be configured to extend in the second plane P2, in assembled position with one of the second or second panels.

In particular, as shown for example in FIG.2, at least a portion of the front surface 15 of the cover member may configured to extend in the first plane P1 , in assembled position with one of the second or second panels.

As derivable e.g. from FIG. 1A, FIG. 1 B, in any of the embodiments the first 31 edge of the second panel 30 may be essentially identical first edge 21 of the first panel 20. For example, the first 31 edge of the second panel 30 may be identical first edge 21. In particular, the first panel and the second panel may comprise identical mechanical locking systems.

Accordingly, the first edge 11 and/or the second edge 12 of the cover member may comprise a mechanical locking system configured to cooperate with at least one edge of the first panel, such as the first edge 21 and/or the second panel, such as the first edge 31 to thereby lock the cover member horizontally and vertically from parting from the first panel and/or second panel in assembled position therewith.

Referring in particular to FIG.3, FIG.6 and FIG.7B, the cover member 10 may be configured such that the first edge 11 of the cover member is assembled in locking state with the first edge 21 of the first panel 20 by means of a folding F or pivoting displacement of the cover member and first panel 20 relative each other. For example, the embodiment shown in FIG.3 may be configured in assembled position by means of the illustrated folding F displacement, such as a folding displacement about the first edge 11 . However, courtesy of the displaceable tongue 114 of this particular embodiment, the cover member may alternatively be configured in assembled position with the first edge 21 by means of linear displacement in a single direction, as will be further elucidated herein.

Also, in the embodiment of FIG.5, courtesy of the flexible strip 115 of this particular embodiment, the cover member may alternatively be configured in assembled position with the first edge 21 by means of linear displacement T in a single direction, as will be further elucidated herein.

Referring in particular to FIG.3, FIG.6 and FIG.7B, the cover member 10 may configured such that the second edge 12 of the cover member is assembled in locking state with the first edge 31 of the second panel 30 by means of a folding F or pivoting displacement of the cover member and second panel 30 relative each other. However, courtesy of the displaceable tongue 124 of this particular embodiment, the cover member may alternatively be configured in assembled position with the first edge 31 by means of linear displacement T in a single direction, as will be further elucidated herein.

As has been explained herein, the cover member may be configured such that the first edge 11 is configured in assembled position with the first edge 21 of the first panel 20 by means of linear translation T or linear displacement of the cover member 10 and/or the first panel 20 towards the other, preferably exclusively a linear translation, such as a linear translation in a direction along the first plane P1. An example is shown in the embodiments of FIG.4 and FIG.5. Accordingly, the cover member may be configured such that the second edge 12 is configured in assembled position with the first edge 31 of the second panel 30 by means of linear translation T or linear displacement of the cover member 10 and/or the second panel 30 towards the other, preferably exclusively a linear translation, such as a linear translation in a direction along the second plane P2. An example is shown in the embodiment of FIG. 4.

The first edge may comprise a tongue groove 112 configured to open in a direction parallel the first plane P1 in assembled position of the cover member and the first panel 20. The tongue groove may be configured to receive a locking tongue 215 of the first edge 21 of the first panel 20, for locking of the cover member from being displaced along the second plane P2, such as along a horizontal H plane or along a vertical V plane.

The first edge 11 of the cover member may comprise a locking element 114 configured to project in a direction perpendicular the first plane P1 in assembled position of the cover member and the first panel. The locking element may be configured to be received in a locking groove 216 of the first edge 21 of the first panel 20 by means of said folding displacement or linear translation as has been described herein. By receiving the locking element 114 in the locking groove 216 the cover member and the first panel may be mutually locked from parting away from each other in a direction along the first plane P1 as shown i.a. in FIG.2, FIG.7A. The locking groove 216 may preferably be open in a direction along the second plane P2 in the assembled state of the cover member and the first panel, such as open towards the stair nose 2.

In the assembled state, immediately juxtaposed upper portions of the first edge 11 of the cover member and the first edge 21 of the first panel 20, may form a forth plane P2’, such as fourth plane, being parallel the second plane P2, such as one of a vertical plane VP or a horizontal plane HP.

The first tongue groove 112 may disposed outboard of said fourth plane P2’, such as away from the stair nose 6 or away from the back surface 16. The locking element 114 may be disposed inboard of the fourth plane P2’, such as towards the stair nose 6 and/or towards the back surface 16 of the cover member and/or towards a center of the first panel 20. The locking element 114 may comprise a displaceable locking tongue, configured to displace in a displacement groove 113 of the first edge 11. The displacement groove 113 may be open in a direction along the second plane P2 in locking position of the cover member 10 and the first panel 20. The displaceable tongue 114 may be configured to displace between an unlocking position and a locking position, wherein the locking position the displaceable locking tongue cooperates with the locking groove 216 of the first panel 20 for locking of the cover member and the first panel from parting away from each other in a direction along the first plane P1. The first 11 edge may extend from the front surface 15 to the back surface

16, preferably the second edge 12 extends from the front surface 15 to the back surface 16.

The first edge 11 may be disposed between the front surface 15 and the back surface 16, preferably, the second edge 12 is disposed between the front surface 15 and the back surface 16. The first edge 11 may comprise an outermost surface extending perpendicular the front surface 15. The outermost surface may be contiguous the front surface 15, preferably the transition comprises a rounded edge portion. At least portion of the outermost surface, or proximal surface, of the cover member may be arranged in the same plane as a front surface of the first panel 20, in assembled state of the cover member and the first panel.

The first edge 21 of the first panel 20 may be essentially identical the first edge 31 of the second panel 30.

The second edge 12 may comprise a second tongue groove 122 of the cover member. The second tongue groove may be configured to open in a direction parallel the second plane P2, such as vertically downwards as shown in FIG.2. The second tongue groove 122 may be configured to receive a locking tongue 315 of the first edge 31 of the second panel 30 in assembled state of the cover member and the second panel 30. By receiving the locking tongue 315 in the second tongue groove 122, the cover member and the second panel may be locked from parting away from each other in a direction along the first plane P1 , such as horizontally away from the stair.

The second edge 12 comprises a second locking element 124 configured to project in a direction parallel the first plane P1 in assembled state of the cover member and the second panel, said second locking element 124 configured to be received in a second locking groove 316 of the second panel 30 in locking assembled state for locking of the cover member and the second panel from parting away from each other in a direction along the second plane P2, said second locking groove preferably being open in a direction along the first plane P1 in assembled state, such as open in a direction towards the stair 5.

In the assembled state, immediately juxtaposed upper edge portions of the second edge 12 of the cover member and the first edge 31 of the second panel 30, may form a third plane PT, such as a third plane, parallel the first plane P1 , such as a horizontal plane HP.

The second tongue groove 122 may be disposed inboard of the third plane PT, such as towards the first edge 11 of the cover member. The second locking element may be disposed outboard of the third plane P1 such as away from the center of the cover member 10.

The second locking element 124 may comprise a displaceable locking tongue 123, configured to displace in a second displacement groove 123 of the second edge. The second displacement groove 123 may preferably be open in a direction away from the back surface 16, such as sideways in assembled state of the cover member and the second panel. The second displaceable tongue 124 may be further configured to displace between an unlocking position and a locking position, wherein the locking position the displaceable locking tongue cooperates with said second locking groove 316 for locking of the cover member and the second panel from parting away from each other in a direction along the second plane P2, such as vertically. Referring to FIG.5, the one or more of the first and second locking element may be detachably attached to the first edge 11 or second edge 12, such as detachably attached to the first tongue groove 112. For example, as shown in FIG.5, a strip 115, which may comprise a resilient material, such as a polymer, may be arranged in one of the first or second tongue grooves 112, 122 such that the resilient strip extends from the tongue groove and projects beyond the back surface 16 of the cover member. The resilient strip 115 may preferably comprise the locking element 114. Thereby, the cover member may be configured in assembled position with the first panel by means of linear translation or a folding displacement as has been explained herein. Curtesy of the strip projecting beyond the back surface 16 of the cover member, it may be facilitated that a thickness, such as a distance between the back surface 16 and the front surface 15 of the cover member may be reduced. Thus, the embodiment may bring about advantages when using a thin cover member.

The panels 20, 30 may comprise a laminate. In all embodiments, one or more of the cover member and/or the first and second panels may comprise a top layer 7, a back layer 8 and a core 9, as illustrated in FIG.3 and FIG.8. The core may comprise wood, such as HDF, MDF or comprising polymer, or comprising concrete or mineral or combinations thereof, such as mineral and polymer.

The first 114 and/or second locking element 124 may be formed in the core of the cover member, preferably by means of milling and/or cutting. One or more of the locking tongues 215, 315 the locking grooves 216, 316 may be formed in the core of the panels 20, 30, preferably by means of milling and/or cutting. In a preferred embodiment the cover member is made from solid wood.

The first 114 and/or second locking element 124 may be formed in the solid wood of the cover member, preferably by means of milling and/or cutting.

In another preferred embodiment the cover member is made of metal, such as aluminum, preferably solid metal, such as extruded metal, more preferably extruded aluminum. The embodiment of FIG.7A may be particularly suitable for being manufactured in metal.

As shown e.g. in FIG.7A and FIG.7B, a surface, such as a portion of the front surface 15, may comprise a plurality of friction imparting grooves, the grooves preferable extending in a longitudinal direction along at least part of the cover member.

As indicated for example in FIG.8, the second panel 30 may be configured in assembled position with the cover member 10 by means of a folding F displacement of the second panel. Also, as indicated, the first panel 20 may be configured in assembled position with the cover member by means of a folding F displacement of the first panel 20. However, it should be understood that the figures indicate exemplary ways of installing the set 2 on the stair 5. For example, the set 2 may be configured in assembled position with each other firstly, and subsequently arranged on the stair 5.

According to embodiments, the cover member may be substantially flat or non-angled, preferably the entire back surface 16 is planar, more preferably the back surface and the front surface 15 are planar.

The first edge 11 may be configured to face towards the first panel 20 in assembled position of the cover member and the first panel.

The second edge 12 may be configured to face away from the first panel 20, in assembled position of the cover member and the first panel.

A further embodiment of a set is shown in FIG.9. The first edge 11 and the second edge 12 of the cover member respectively comprises, in addition to the features of the cover member explained in relation to any of the embodiments of FIGS 1-8, a second locking tongue 118. 128 provided between the tongue groove 112, 122 and the front surface 15, 15a. The first panel 20 and the second panel 30 further comprises at a respective first edge 21 , 31 a complementary second tongue groove 218, 318 between the locking tongue 215, 315 and the front surface 15’,

15”, for receiving the second locking tongue. Thereby, the joints between the cover member and the first and second panels respectively may be provided with improved sealing properties. ITEMS

ITEM 1. A stair nose cover member 10, such as a profile or panel, the cover member comprising a first edge 11 , such as a long edge, comprising a first mechanical locking system configured to cooperate with a mechanical locking system of a first edge 21 of an adjacent first panel 20 for horizontal and vertical locking of the cover member 10 to said first panel 20, and a second edge 12 comprising a second mechanical locking system configured to cooperate with a mechanical locking system of a first edge 31 of an adjacent second panel 30 for horizontal and vertical locking of the cover member to said second panel, wherein the cover member is configured such that in assembled position of the cover member with the first panel and the second panel, a front surface 15’ of the first panel extends in a first plane P1 , such as one of a horizontal H or vertical V plane, and a front surface 15” of the second panel extends in a second plane P2 being essentially perpendicular, preferably perpendicular the first plane P1 , such as the other of a horizontal or vertical plane.

ITEM 2. The cover member according to item 1 , wherein a front surface 15 of the cover member is configured to extend in the second plane P2, in assembled position with one of the second or second panels.

ITEM 3. The cover member according to item 1 or 2, wherein at least a portion of the front surface 15 of the cover member is configured to extend in the first plane P1 , in assembled position with one of the second or second panels.

ITEM 4. The cover member according to any one of the preceding items 1 to 3, wherein the first 31 edge of the second panel 30 is essentially identical first edge 21 of the first panel 20.

ITEM 5. The cover member according to any one of the preceding items 1 to 4, wherein the cover member 10 is configured such that the first edge 11 of the cover member is assembled in locking state with the first edge 21 of the first panel 20 by means of a folding F or pivoting displacement of the cover member and first panel 20 relative each other.

ITEM 6. The cover member according to any one of the preceding items 1 to 5, wherein the cover member 10 is configured such that the second edge 12 of the cover member is assembled in locking state with the first edge 31 of the second panel 30 by means of a folding F or pivoting displacement of the cover member and second panel 30 relative each other.

ITEM 7. The cover member according to any one of the preceding items 1 to 6, wherein the cover member is configured such that the first edge 11 is configured in assembled position with the first edge 21 of the first panel 20 by means of linear translation T or linear displacement of the cover member 10 and/or the first panel 20 towards the other, preferably exclusively a linear translation, such as a linear translation in a direction along the first plane P1.

ITEM 8. The cover member according to any one of the preceding items 1 to 7, wherein the cover member is configured such that the second edge 12 is configured in assembled position with the first edge 31 of the second panel

30 by means of linear translation T or linear displacement of the cover member 10 and/or the second panel 30 towards the other, preferably exclusively a linear translation, such as a linear translation in a direction along the second plane P2.

ITEM 9. The cover member according to any one of the preceding items 1 to 8, wherein the first edge comprises a tongue groove 112 configured to open in a direction parallel the first plane P1 in assembled position of the cover member and the first panel 20, said tongue groove configured to receive a locking tongue 215 of the first edge 21 of the first panel 20, for locking of the cover member from being displaced along the second plane P2, such as along a horizontal H plane or along a vertical V plane.

ITEM 10. The cover member according to any one of the preceding items 1 to 9, wherein the first edge 11 of the cover member comprises a locking element 114 configured to project in a direction perpendicular the first plane P1 in assembled position of the cover member and the first panel, said locking element configured to be received in a locking groove 216 of the first edge 21 of the first panel 20 by means of said folding displacement or linear translation for locking of the cover member and the first panel from parting away from each other in a direction along the first plane P1 , said locking groove 216 preferably being open in a direction along the second plane P2 in the assembled state of the cover member and the first panel, such as open towards the stair nose 2.

ITEM 11. The cover member according to any one of the preceding items 1 to 10, wherein respective upper edge portions of the first edge 11 of the cover member and the first edge 21 of the first panel 20, in the assembled state, forms a forth plane P2’ being parallel the second plane P2, such as one of a vertical V plane or a horizontal H plane. ITEM 12. The cover member according to any one of the preceding items 1 to 11 , wherein said tongue groove 112 is disposed outboard of said fourth plane P2’, such as away from the stair nose 6, and said locking element 114 is disposed inboard of said fourth plane P2’, such as towards the stair nose 6 and/or towards the back surface 16 of the cover member and/or towards a center of the first panel 20.

ITEM 13. The cover member according to any one of the preceding items 1 to 12, wherein the locking element 114 comprises a displaceable locking tongue 114, configured to displace in a displacement groove 113 of the first edge 11 , said displacement groove 113 opening in a direction along the second plane P2 in locking state of the cover member 10 and the first panel 20, said displaceable tongue 114 being configured to displace between an unlocking position and a locking position, wherein the locking position the displaceable locking tongue cooperates with said second locking groove 216 for locking of the cover member and the first panel 20 from parting away from each other in a direction along the first plane P1.

ITEM 14. The cover member according to any one of the preceding items 1 to 13, wherein said first 11 edge extends from the front surface 15 to the back surface 16, preferably said second edge 12 extends from the front surface 15 to the back surface 16.

ITEM 15. The cover member according to any one of the preceding items 1 to 14, wherein said first edge 11 is disposed between the front surface 15 and the back surface 16, preferably, said second edge 12 is disposed between the front surface 15 and the back surface 16.

ITEM 16. The cover member according to any one of the preceding items 1 to 15, wherein the first edge 11 comprises an outermost surface 15a extending perpendicular the front surface 15, the outermost surface is contiguous the front surface, preferably the transition comprises a rounded corner.

ITEM 17. The cover member according to any one of the preceding items 1 to 16, wherein a portion of the outermost surface is arranged in the same plane as a front surface of the first panel, in assembled state of the cover member and the first panel.

ITEM 18. The cover member according to any one of the preceding items 1 to 17, wherein the first edge 21 of the first panel 20 is essentially identical the first edge 31 of the second panel 30.

ITEM 19. The cover member according to any one of the preceding items 1 to 18, wherein the second edge 12 comprises a second tongue groove 122, configured to open in a direction parallel the second plane P2, such as vertically downwards, said second tongue groove 122 configured to receive a locking tongue 315 of the first edge 31 of the second panel 30 in assembled state of the cover member and the second panel 30, for locking of the cover member from being displaced in a direction along the first plane, such as horizontally away from the stair.

ITEM 20. The cover member according to any one of the preceding items 1 to 19, wherein the second edge 12 comprises a second locking element 124 configured to project in a direction parallel the first plane P1 in assembled state of the cover member and the second panel, said second locking element 124 configured to be received in a second locking groove 316 of the second panel 30 in locking assembled state for locking of the cover member and the second panel from parting away from each other in a direction along the second plane P2, said second locking groove preferably being open in a direction along the first plane P1 in assembled state, such as open in a direction towards the stair 5. ITEM 21. The cover member according to any one of the preceding items 1 to 20, wherein respective upper edge portions of the second edge 12 of the cover member and the first edge 31 of the second panel 30, in assembled state, forms a third plane PT parallel the first plane P1 , such as a horizontal H plane.

ITEM 22. The cover member according to any one of the preceding items 1 to 21 , wherein said second tongue groove 122 is disposed inboard of said third plane PT, such as towards the first edge 11 of the cover member, and said second locking element is disposed outboard of the third plane PT, such as away from the center of the cover member 10.

ITEM 23. The cover member according to any one of the preceding items 1 to 22, wherein the second locking element 124 comprises a displaceable locking tongue 123, configured to displace in a second displacement groove 123 of the second edge, said displacement groove preferably opening away the back surface 16, such as sideways in assembled state of the cover member and the second panel, said second displaceable tongue 124 being configured to displace between an unlocking position and a locking position, wherein the locking position the displaceable locking tongue cooperates with said second locking groove 316 for locking of the cover member and the second panel from parting away from each other in a direction along the second plane P2, such as vertically. ITEM 24. The cover member according to any one of the preceding items 1 to 23, wherein the one or more of the first and second locking element is detachably attached to the first edge 11 or second edge 12, such as detachably attached to the first tongue groove 112.

ITEM 25. The cover member according to any one of the preceding items 1 to 24, wherein one or more of the cover member, the first panel, the second panel comprises a top layer 7, a back layer 8 and a core 9, the core comprising wood, such as HDF, MDF or comprising polymer, or comprising concrete or mineral or combinations thereof, such as mineral and polymer.

ITEM 26. The cover member according to any one of the preceding items 1 to 25, wherein the first 114 and/or second locking element 124 is formed by means of milling and/or cutting.

ITEM 27. The cover member according to any one of items 1 to 26, wherein the cover member is made of solid wood or metal, such as aluminum, preferably extruded metal, more preferably extruded aluminum.

ITEM 28. The cover member according to any one of items 1 to 27, wherein a surface, such as a portion of the front surface 15, comprises a plurality of friction imparting grooves, the grooves preferable extending in a longitudinal direction along at least part of the cover member.

ITEM 29. The cover member according to any one of items 1 to 28, wherein the cover member is substantially flat or non-angled, preferably the entire back surface 16 is planar, more preferably the back surface and the front surface 15 are planar, most preferable the back surface and the front surface 15 are planar and parallel.

ITEM 30. The cover member according to any one of items 1 to 29, wherein the first edge 11 is configured to face towards the first panel 20, and the second edge is configured to face away from the first panel 20, in assembled position of the cover member and the first panel.

ITEM 31. The cover member according to any one of the preceding items 1 to 30, wherein the first edge 11 comprises an outermost surface 15a extending perpendicular the front surface 15, the outermost surface and the front surface 15 extend continuously, preferably the front surface 15 transcends into the outermost surface 15a, such as via a rounded edge. ITEM 32. The cover member according to any one of the preceding items 1 to 31 , wherein the first edge 11 and the second edge 12 are configured to be assembled with like building panels, such as essentially identical building panels. ITEM 33. The cover member according to any one of the preceding items 1 to 32, wherein the first mechanical locking system and the second mechanical locking system are essentially identical locking systems. ITEM 34. A set comprising the cover member 10, the first panel 20 and preferably the second panel 30 according to any one of the preceding items 1 to 33.

ITEM 35. The set according to item 34, wherein the set is configured to be assembled independent the stair 5.