Falling and Rasing Edge Detector

I will use a motor adapter in my design.This motor adapter doesn't have a spice model. Therofore I will design inside structure of this adapter. In this motor adapter has a delay and xor gate part.I think this part makes edge detection.By using below reference desing from this website rising edge (0 to1)and falling edge(1 to 0) detector circuit for flipflops? I built a edge detector circuit in LTSpice by using 74HCT04 inverters. But 74HCT04 gives only inverse of input, it doesn't give any delay. How 74hct04 can give delay and how I can obtain an positive edge detector by using delay and xor gate?