Reminds me of a midieval torture device.

For a reasonable idea of the size of this contraption, look at the propane cylinder on the plywood next to it.

As an aside... I find it interesting that on my upper right hand corner.... "Talk Dirty To me" is a related group to this.

Hmmmmmm......

It looks painful!!

A splitter for kindling....

I haven’t a clue!

If the rails for the slide are about 6" apart I would have to go with clanks as far as it being a fruit slicer, increase that's a 12" and then maybe a log splitter. And with some retro engineering you could make it into a can crusher. Or maybe a turnip twaddler. Opus had one of them.

Log splitter

I can't tell the size from the photo but it looks like a lemon and lime or orange slicer that would be used in a restaruant.

I don't know. It appears to be made mostly of aluminum. It seems it would be too flimsy for splitting wood. With what appears to be a standard grill propane bottle in the background, I think it would also be too small for splitting wood. Perhaps intended for fruits and vegetables.

Log Splitter.

Hand operated wood burning stove wood splitter. Lay the handle down flat and pull back to the end of the carriage rails gives just over 14" for an 8" diameter or less log. We had one similar to this for our stove on the farm in Oregon circa 1945. This one is not the same, though ours cut logs into 6 pieces as well and the handle arrangement on ours was a bit different, but the general layout is the same. Our stove took pieces no longer than 12", hence the short throw. It was bolted down to the floor next to the wood bin by the stove so we wouldn't have to be outside in the snow and -10° temperature splitting wood for dinner.

An older manual engine cylinder hone? Was there perhaps a do it yourselfer car/truck mechanic in the family?

I'm going to guess vaginal stimulator.

It slides on the rails obviously, my guess would be some form of wood splitter, but it seems a bit short for a wood splitter.

post a vid of it moving

Is it some kind of shooting stick?

How big is it? It looks like some kind of splitter, but looks too small to be a log splitter. Maybe a kindling splitter? I don’t know, but looks like it splits something more or less cylindrical in shape into six smaller wedge shaped pieces.

No idea. Sorry.