Yes the 4069 is a simple and effective way of doing what you want, if you want your outputs to go (0) low when you have a high (1) input
Use a 10k pulldown resistor from your input to ground, this will keep your output high when there is nothing connected to it, and when you send a high to your input the output will go low, and as soon as you disconnect that high from the input, the 10K pulldown resistor will sent the output high again.
if you want to have it the other way around (if you want to sent a low (0) to the input in stead of a high, you can connect a 10K resistor to +V, and this will keep your output low, until you connect a low to your input)