Merging two Access tables into one
Create a new table that have all the columne in all your 5 tables, then create the needed SQL statment like SELECT * FROM Tb1 INTO TableWithAllColumns
eventually add some WHERE to exclude the duplicate rows from the insert.

This will work if your table doesent have similar rows.
If you need to merge similar rows together, there is no a simple  way to tho this.
The best you can do is find, or write, a tool that can compare all the value in all the columns and act in the right way.