How does this work? (Help please!!)

[rileytoolworks]

My wife has just shown me this sofa bed on ebay. http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 499wt_1159
Does anyone know how this hinges? I'd much rather make one than but one.
Thanks in advance for any help.

Adam.

 

[SketchUp Guru]

I've seen that mechanism somewhere. I'll look and see if I can find anything.

 

[rileytoolworks]

Thanks Dave.
How's the family?
Nice post about saving your Sketchup progress. I like your idea of keeping all the files neat and tidy. I must try that some day!

Adam.