Anchor rod anchor system of a concrete wall form

A locking device of an anchor system for concrete wall form elements, the anchor system having an anchor rod with an outer thread, the device comprising:

• a fastening element cooperating with a back of a form element;
• a dome plate cooperating with said fastening element to fasten said dome plate to the back of the form element, said dome plate having a spherically shaped plate section defining an opening;
• a screw nut element having an inner opening with a screw thread for cooperation with the outer thread of the anchor rod, said screw nut element being disposed in said opening of said spherical plate section with radial play, said screw nut element defining a receptacle structured as a radial groove around an entire circumference thereof, said radial groove accepting edges of said spherical plate section opening;
• and
• a tubular guidance facility aligned with said screw thread of said screw nut element and disposed at an end of said screw nut element facing a form element.