I've got two twin beds "joined". There are basically four independent components: two mattresses and two bed bases.
They are pretty uncomfortable to sleep on. They shift as I move at night. They aren't fixed in any way.
I was thinking of connecting them by a strap. Something like this, but not that fancy. It would help to solve the upper part. The lower one would still be free and detached.
Do you have any idea how to make this thing stable and interconnected?
Thank you in advance.
Update:
It's a rented apartment, and I am not supposed to sell things or change them significantly.
I don't wanna buy new furniture.
Best Answer
What I would actually do:
For sale: two twin beds.
Want to buy or trade: one (double, queen, king) bed.
It's the simple solution, it's the right solution, it gets rid of the fundamental problem at a fundamental level.
Your pictures do not inform about the bedframes very well. Standard iron frames could be easily conjoined with hose clamps, or bolts, or u-bolts. Wooden frames can be screwed or bolted if you don't mind putting some holes in them.
At the upper level, I vaguely recall some sort of T-pad being sold for the center joint, and it helps immensely if you put on a mattress pad that fits over both beds, as well as sheets that do the same.