Copy a keyframe to change the location

Hi everyone could you please help me.
How to copy the rigs keyframes of the objects to make them move or jumping forward in order to change the location? I made a copy of the Pixar logo animation. All keyframes were put from 0 points
to the letter ''R"yellow road![pixar animation “created keyframes for the table lamp was indicated with the yellow marker on the picture” I would like to use the same keyframes continually move forward the table lamp.