Abstract: A webbing locking device for the seat belt of an automotive vehicle comprises a retractor base, a speed change detector, a webbing take-up reel, a brake for the reel, a rotor for winding the webbing, and rotor arms supporting the rotor for relative movement and mounted so as to be pivotable relative to the retractor base. The outer peripheral surface of the rotor is formed with rotor latch teeth, and the upper end of the rotor arms is formed into a brake for meshing with the rotor latch teeth.

Abstract: An emergency locking type retractor has a retractor base, a take-up reel rotatably supported by the retractor base, locking means provided in the retractor base, a latch member, a guide member, a biasing member for urging the latch member towards axially outward direction, a ratchet wheel, a first ratchet movably mounted on the ratchet wheel, an inertia member, a latch portion for engagement with the first ratchet, and a vehicle sensing mechanism having a second ratchet. The retractor is designed such that when rotation of the ratchet wheel is stopped by the first ratchet or the second ratchet, the latch member is caused to slide axially by a cam portion of the ratchet wheel and is led by the guide member to a position in which it is engaged with the locking means, whereby the rotation of the take-up reel in webbing draw-out direction is locked.