Each restaurant has restaurant branches, each branch must determine which days of the week it opens, each of those days must determine (several) open_hour and close_hour thru that day.

I created one to many relationship using these tables: rest_names ---> rest_branches ---> open_days ---> open_hours

Am I going right this way? or there is another way to do this, maybe less complicated? And how the query will be like to get the hours of a restaurant on a specific day, say sunday?