Abstract: A device for detachably supporting a work stand to a wall surface (2) for example. This includes a supporting member (4) which originates from the securing surface and which can be hooked up, by means of a coupling device (3) fitted to the supporting member, in a holder element (1) fixed to the wall surface. This is formed like a plate-shaped body which comprises at least one supporting surface adapted to be fixed to the wall surface (2) and two hooking-up portions which are directed away from one another and each of which has its own bearing surface facing the wall surface (2). The coupling device (3) comprises two portions (11) which are provided with guide surfaces facing one another. Between them these form a gap adapted to receive the holder element. Situated in the gap are locked members (16, 22) which are each hooked up by their own hooking-up portions. A device (21) is able to be changed over between a locking position and a releasing position.

Abstract: A device for coupling together laterally directed scaffold elements (11) and uprights in a scaffold (12) or the like. Each coupling device (1) includes an engagement member (2) which is connected to the upright and is open upwards at least in the position of use. Said member is provided with a wall (6) which extends with spacing from the upright and which delimits a space (4) situated between the upright and the wall. A hook-shaped member (9) is situated at least at one end of said scaffold element (11) and is adapted to hook into the engagement member. A first clamping member (14) is movable in relation to the scaffold member and is adapted to bear against the upright and the engagement member. A second clamping member (22/31) is adapted, in a locking position to be forcibly gripped between the first clamping member and the scaffold element.