Tabby said:
6mm steel rod runs from wall to midway out on the table at each end.
Rear of table pushes into holes in wall. To collapse, pull table
outwards and rotate it flat to the wall. The steel rods dont
disconnect, they pivot at each end.
Good answer, but only if the purpose of the table is such that having
the rods coming that far out doesn't mean they're going to be in the
way. The OP hasn't indicated the purpose but has hinted that its working
height is quite high, so it probably isn't for dining, but if it were,
the rods would be in the way of half the diners. It might help if the
OP said what it was to be for.
Another is to have the table entirely liftoffable, and hang it on
hooks on the wall to store.
Nor has the OP said what form of support he had in mind for the
end of the table most distant from the wall. A cord or chain anchored
in the ceiling? A cord to a ceiling mounted pulley and thence to a
cleat on the wall? A hinged single leg? One could conceivably put his
"movable pivot" into practice. I.e. have the table's hinged end not
attached to the wall directly, but to a fitting which is attached to
the wall in such a way that it can be cranked up and down somehow.
But a simplified form of this would be similar to your "liftoffable"
suggestion: Affix a dowel to the wall end of the table, this dowel
should be some 3 inches or so longer than the table's edge, so that
it projects out a bit on both ends. To the wall affix two pairs of
large hooks (preferably carved out of wood), they need to be large
enough for the dowel to sit in their grooves. Affix one pair low
down, at a distance from the ceiling at least long enough for the
table to clear the ceiling. Affix the other pair at working height.
This upper pair could also incorporate an arrangement for clipping
the table in the stowed position, so that it doesn't come crashing
down of its own accord.