The invention relates to a partition (19) having horizontal guide rails (14, 14') held between lateral stops (16) and including three collapsible door panels (18, 20, 22) adapted to be moved to and from either side. The middle panel (20) is offset to the front and is articulated to one outer panel (22), whereas a groove (36) is provided on the upper edge of the middle panel for guiding a slidable articulation (28) attached to the other outer panel (18). An opener (40) having two lever arms (42, 48) is mounted to the articulation (30) and will be pivoted as the slidable articulation (28) passes, a long lever arm (48) engaging a slide face (52) of a joint crown (50). Magnetic gibs (60) are provided on the lateral stops (16) and on ledges (58) of the adjacent vertical edges (56) of the outer panels (18, 22). Preferably ball-boren rollers (66) support the door panels along the upper guide rail (14).

A collapsible doorplate assembly includes a fixing member secured to a wall, a length-adjustable connecting device having a first end securely connected to the fixing member and a second end, a number of pivotal connecting members, and a number of leaf plates. Each two adjacent leaf plates are pivotally connected by one of the pivotal connecting members. An innermost one of the pivotal connecting members, which is nearest to the fixing member, is connected between the length-adjustable connecting device and an innermost one of the leaf plates which is nearest to the fixing member. The length-adjustable connecting arrangement includes an engaging member and a movable member. The engaging member includes a first end securely engaged with the fixing member and a second end. The movable member includes a first end slidably engaged with the second end of the engaging member and a second end in pivotal connection with the innermost pivotal connecting member.

A foldable door includes two door panels each having a rounded adjacent side. A safety member is disposed in the gap formed between the door panels and includes two curved recesses for engaging with the rounded adjacent sides of the door panels. Two couplers are secured to the safety members and each includes two shafts engaged in the door panels for pivotally coupling the door panels together and for allowing the door panels to be rotated about the shafts. The safety member may enclose the gap for preventing a user from being hurt between the door panels.

A bifold door comprises a pair of door panels 12.1, 12.2 joined to one another along a centre hinge 14. Each door panel, at the end thereof remote from the center hinge, is supported on a track 16 by a runner assembly 18 to which the door panel is pivotally connected. Each runner assembly is provided with a cam 32 whereby the runner assembly can releasably be locked in position with respect to the track.

A folding partition (1), for example, a door or a wall, made up of modules. Each module includes four panels arranged in two opposite pairs of hinged panels (4) and connectors (5) interconnecting said pairs along the non-hinged edges of the panels to form a box-shaped module (3) which can be suspended from a guide. Connectors of adjacent modules can be connected with one another. Each connector comprises two coupling members extending each along a non-hinged edge of a panel and two or more bridge pieces arranged between the coupling members, while the coupling members of the connectors of adjacent modules can be coupled with one another, by U-shaped coupling strips (13), in order to have the partition readily manufactured on an industrial scale and easily transported and mounted to and on the building site respectively.