Abstract: A frame has an upper support track and a lower guide rail and supports a first panel with a groove member and a sliding second panel. The second panel includes a tongue member to mate with the groove member, the tongue member disposed on a vertical edge of the second panel. The second panel includes a flange element disposed on the vertical edge to overlap a portion of the first panel when the tongue member is inserted into the groove member. A mutual attraction device is provided including a first mutual attraction part and a second mutual attraction part connected to the second panel. A fulcrum tilts the second panel when the first mutual attraction part engages the second mutual attraction part, the tilting allowing for the extension to disengage the lower guide rail to allow the second sliding panel to pivot about the sliding panel pivot axis.