Set of building panels comprising a locking device

Abstract

A set of panels including a locking device for locking a first edge portion of a first panel to a second edge portion of a second panel. The locking device includes a horizontal locking device and a vertical locking device. The vertical locking device includes a separate tongue arranged in an insertion groove of the first edge portion, wherein the separate tongue includes flexible members, and a tongue groove provided in the second edge portion. In a vertically locked state of the first and second edge portions, an abutment member provided 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. The stop surface is arranged closer than the locking portion to an inner portion of the insertion groove.

1 . A 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, wherein the locking device comprises a horizontal locking device and a vertical locking device, the vertical locking device comprising:
 a separate tongue arranged in an insertion groove of said first edge portion, a longitudinal extension of the separate tongue extending along the first edge portion, wherein the separate tongue comprises flexible members configured to face an inner portion of the insertion groove when the separate tongue is arranged in the insertion groove, the flexible members being configured to displace the separate tongue outwards during locking or unlocking, and   a tongue groove provided in, and extending along, said second edge portion,   wherein the locking device is configured such that, in a vertically locked state of the first and second edge portions:   an abutment member provided at a longitudinal end portion of the separate tongue cooperates with a stop surface of the second edge portion,   a locking portion of the separate tongue cooperates with the tongue groove, and   the stop surface is arranged closer than an outermost section of the locking portion to said inner portion of the insertion groove, and   the locking portion of the separate tongue is longitudinally bent,   wherein, during locking, the locking portion is configured to be gradually inserted into the insertion groove along the first edge portion in a first stage, and in a second subsequent stage the locking portion is configured to be gradually inserted into the tongue groove along the second edge portion.   
     
     
         2 . The set of building panels according to  claim 1 , wherein the locking device is configured such that, in the vertically locked state, a horizontal distance from the inner portion to the stop surface is smaller than a horizontal distance from the inner portion to the locking portion. 
     
     
         3 . The set of building panels according to  claim 1 , wherein the locking device is configured such that, in the vertically locked state, the stop surface forms an angle of 0°-10°, with respect to a vertical direction. 
     
     
         4 . The set of building panels according to  claim 1 , wherein the stop surface is one of at least two stop surfaces, and wherein two of the at least two stop surfaces are arranged on opposing sides of the tongue groove. 
     
     
         5 . The set of building panels according to  claim 1 , wherein the stop surface is arranged adjacent to the tongue groove along the second edge portion. 
     
     
         6 . The set of building panels according to  claim 1 , wherein the stop surface is disposed at a same vertical level as a portion of the tongue groove. 
     
     
         7 . The set of building panels according to  claim 1 , wherein the locking device is configured such that, in the vertically locked state, the stop surface prevents a displacement of the separate tongue outwards from the insertion groove. 
     
     
         8 . The set of building panels according to  claim 1 , wherein the stop surface is provided in a separate material that is distinct from other portions of the second edge portion. 
     
     
         9 . The set of building panels according to  claim 1 , wherein the abutment member is one of at least two abutment members, and wherein opposing longitudinal end portions of the separate tongue each comprise a respective one of the at least two abutment members. 
     
     
         10 . The set of building panels according to  claim 1 , wherein the abutment member is pretensioned against the stop surface in said vertically locked state. 
     
     
         11 . The set of building panels according to  claim 1 , wherein a longitudinal length of the separate tongue exceeds a longitudinal length of the tongue groove. 
     
     
         12 . The set of building panels according to  claim 1 , wherein a longitudinal length of the second edge portion exceeds a longitudinal length of the tongue groove. 
     
     
         13 . The set of building panels according to  claim 1 , wherein the locking portion protrudes from the insertion groove along at least 50% of a longitudinal length of the separate tongue in the vertically locked state. 
     
     
         14 . The set of building panels according to  claim 1 , wherein the first edge portion of the first panel and the second edge portion of the second panel are short edge portions which are shorter than long edge portions of the first and second panels. 
     
     
         15 . The set of building panels according to  claim 1 , wherein, during locking, the second edge portion cooperates with the locking portion for displacing the separate tongue into the insertion groove. 
     
     
         16 . The set of building panels according to  claim 1 , wherein the flexible members each extend from a respective base portion of the separate tongue, a flexible member extending from a base portion arranged at the longitudinal end portion extending from and being bendable around a longitudinal inner side of the base portion. 
     
     
         17 . The set of building panels according to  claim 1 , wherein the horizontal locking device comprises a locking element arranged on a strip extending horizontally outwards 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 being configured to cooperate to provide a horizontally locked state of the first and the second edge portions. 
     
     
         18 . The set of building panels according to  claim 1 , wherein the first and second edge portions are configured to be vertically unlocked by a forced relative vertical displacement of the first and second edge portions away from each other and/or by a repeated forced relative vertical displacement of the first and second edge portions away and towards each other.