Stuck, stuck, stuck and lost

Hi. I am on the 5th floor. I only know this because the strategy guide says that the items that I got most recently are obtained there.
I haven't played in a couple of days & cannot remember at all what I last did but I have these items on me:
gear
elevator ke
energy cell
joystick

I have been back & forth over & over trying to find the elevator depicted in the guide but I'm just not finding it.
Where I am now (hope this helps?) is in a room that has a conveyor belt slightly to the left & a rope to climb down on the right side.

I just keep going around in circles. Not sure I like the fact that you cannot get hints in this game unless they're related to a specific item. If you know what I mean. That's a little bit hard to explain, but is basically how it works.

Hi to the left is a box you have to open the box with the knife and get the contents to use in the elevator room. hope this helps