Multiple-unit indexing clamp with mating vertically-grooved stacking units

A multiple-unit indexing, mechanical scissor clamp for handling one or more modular segmental retaining wall units, also called “SRW blocks” having opposite ends each provided with a vertical groove, wherein said indexing clamp comprises:

• a rigid clamp arm sized to fit into one of the grooves of the SRW unit;
• a moving clamp arm pivotably connected to the rigid clamp arm and sized to fit into the opposite groove of the same SRW unit;
• and
• a pair of hanger bars having upper ends pivotably connected to each other by a horizontal pin that is slideably moveable up and down into a groove forming a travel path with different holding positioning in a vertical indexing element, said hanger bars also having bottom ends respectively connected to the rigid and moving clamp arms in order to allow them to open and close while the pin moves through the travel path;
• and
• an indexing foot also connected to the horizontal pin said indexing foot being slideably mounted into the vertical indexing element and projecting downwardly from the same to contact the SRW block located just below.
• whereby, in use, positioning of the indexing clamp onto one or more stacked SRW blocks to be left, causes the indexing foot to move up and thus to cause the pin to move up also through the travel path until it reaches a suitable position where the clamp arms are actuated to catch the SRW block left in the lower position, and allow it and all the others that may be stacked on it, to be left.