To provide a framework where those pinches do not wind each other since a pinch which is installed in the same product winds each other and it reduces a working efficiency in a washing product which uses at least more than one pinch.

Since other pinches make an intrusion into a space in the upper part of a pinch, entanglement occurs. A bridge is installed in the upper part so that other pinches do not make an intrusion into the space. An entrance to the space is closed.