Bead guide implement for facilitating the mounting of tires onto respective wheel rims

A tire mounting machine comprising:

• a base frame;
• a generally horizontal self centering unit mounted there on a generally vertical column located on said base frame at a distance from an axis of said horizontal self centering unit;
• a generally horizontal arm supported by said generally vertical column, said generally horizontal arm having a free end which protrudes over said self centering unit;
• a prismatic generally vertical rod slidingly mounted at said free end of said generally horizontal arm;
• a tire mounting tool fixed at a lower end of said rod;
• and
• a shaped arm pivotally connected at one end to a ring which is rotatably and slidably mounted on said prismatic vertical rod, said shaped arm supports a projecting profiled head at a second end, said shaped arm being able to occupy a raised rest position and a lowered working position in which said projecting profiled head can be inserted between an edge of a wheel rim locked by the self centering unit and a bead of a tire to be mounted, and to rest against a seat of a wheel which receives the bead.