Fraco Exoskeleton by Mawashi


Discover the most recent innovation in the field of masonry



Fraco exoskeleton by mawashi unveiled at world of concrete (woc) 2020 in las vegas



Actuation System for the Upper Limbs


  • Hybrid system combining passive and quasi-passive actuation to support and assist the mason’s arm

  • Assists the mason in lifting and placing the masonry blocks as well as manipulating masonry tools

  • Does no restrict the mason’s ease and range of motion when using the trowel and applying mortar

  • Aims at reducing muscle fatigue during various tasks involving the upper limbs


Quasi-Passive Joint Locking Mechanism


  • Supports the weight of the mason’s arm, masonry blocks and tools by compensating for gravity

  • Positioned directly at the arm articulations

  • Supports torques of up to N·m on the elbow and shoulder joints

  • Can support up to 15 lb per arm (outstretched arm)

  • Can support up to 26 lb per arm at the elbow

  • Very low energy consumption

  • Rapid engagement/disengagement

  • Several days of autonomy for standard masonry tasks

  • Compatible with Li-on packs


Passive Lifting Assistance Mechanism


  • Consists of an elastic system coupled with an optimized spring-cam mechanism

  • Provides up to 27.5 N·m (Peak) at the shoulder joint and 17.5 N·m at the elbow joint to the user when lifting objects with his arms

  • Can lift up to 10.5 lb per arm (outstretched arm)

  • Can lift up to 10.5 lb per arm at the elbow joint

Data provided for a man of average height (5’10”)