Not sure, but it looks like it might be an older Hinterberg frame. Does it have black plastic knobs to turn the ratchets?
Try doing a Google of "images" for quilting frames to see if you can find one that looks like it.
There are 3 poles with ratchets, right? If so, I think it would load like any other 3-pole hand quilting frame. There might be a Youtube video on how to do that.