dovetail drawer guide?
My neighbor has twin 3 year olds, one is autistic and a husband with MS so she had me build a 'door/gate' for her kitchen so she can escape. It's a galley kitchen with about 6' opening between the cabinets and the far wall.
I took a piece of 3/4" plywood, cut it into ~thirds and put heavy duty 23" drawer glides in between so the three sections can telescope out to cover the walkway or retract to hug the end of the cabinet. I also added a wheel to the leading edge so the glides didn't support the whole weight.
One of the boys grabbed the end third and shook it until the glide popped apart sending ball bearings everywhere. So rather than replacing the drawer glide every time, maybe I should redesign the glide. The sections are offset by 1/2" (the thickness of the glides).
My first thought is dovetail drawer glide set on its side. My next thought is to design a different kind of pocket glide, maybe a "G" type shape for the female side and a reverse "h" shape for the male side.