I'm going to recline the chair now / I'm going to move the chair into a reclining position now
I'm going to move the chair back up now / I'm going to return the chair to the upright position now
「椅子を倒します」= I'm going to recline the chair now / I'm going to move the chair into a reclining position now
「椅子を戻します」= I'm going to move the chair back up now / I'm going to return the chair to the upright position now