Removing the back rest from a sofa

[AndyF6]

I have 2 sofas and I need to take the head rests off them to move them through a door, as I'm trying to move them between rooms.

The sofas are made by a company called Sofa italia. I tried to contact them for advice but they didn't reply. The sofas were included in a house I bought so I've no idea how they got them in and don't have any instruction leaflets.

The headrests attach to the "base" of the sofa on 2 metal posts. I've included a photo showing this. The problem is there doesn't seem to be any way to un-clip these. Inside of the cushion there is what looks like an allen key type of nut but there's no space between this and the metal so can't get a key in to unscrew it.

Any advice would be appreciated.

 

[Boscho]

Can't be sure from your photo but if this is the style of sofa I'm imagining the headrest should fold flat. Would that give you the clearance you need?