Cleaning equipment signs / signs

In public places which are always open, cleaners usually start to clean the area after setting up the safety
sign panel for the safety of the people or smooth cleaning. However, when it comes to storing it, it takes
up much spaces and has to be moved privately because it is kept separately with the cleaning equipment.
I suggest combination method of cleaning equipment and safety sign panel.
I would like to design it that two are combined to be kept at once and handled by one hand.