It is called a clothes prop. At least that is what it is called in Pittsburgh Pennsylvania. When I moved to Texas I left mine behind and so wish I could find some to purchase in Houston Texas. With our humidity I have 2 lines in the garage to use when it will not do to hang outside and I use my dryer very little. One note, my garage if finished with a tile floor ,is heated and air conditioned, and is the most wonderful sewing room ever.
Donna