Oh man...I'm not sure how to describe it... A quick runover would be: 1) get a belt and attaching 2 carabiners to it, this will be where you hand your swords from.
2) Using a length of rope (or two), tie 2 swords together in a fixed angle. Use the other length of rope to tie the 3rd sword on and secure the angle. If there's some rope leftover, tie a loop so that it can hang from the carabiner.
3) Get another length of rope, tie it behind the carabiner on the belt. This will be used to support the back of the swords so that it hangs on an angle and not vertically down.
With regards to exactly how to tie the swords, it's hard to explain over the internet D:
omg, can you possibly send me a link when u upload those stuff?!?! (cos.. i'm sorry for the trouble but my inbox gets very cluttered/busy... ;A; cry but i want to see your new works - so if it isn't a trouble... it'd be great if you can spam my profile page or Note with your links ^p^ (only if you don't mind lol )
looking forward to it ^^ good luck! <333
ps. WAhhh... you know of my artworks..? ;w; (embarrassed... i didn't even know if you look at my crap..! thank you!! ･ﾟ･(ﾉД`)･ﾟ･ such a big compliment... ;A; )