Webbing take-up device

A webbing take-up device comprising:

• a take-up shaft that takes up a webbing belt for restraining a vehicle passenger;
• a metal frame that axially supports the take-up shaft at both ends of the take-up shaft;
• and
• a lock mechanism comprising a lock plate that blocks rotation in the pullout direction of the webbing of the take-up shaft by engaging the take-up shaft directly or indirectly, a torsion shaft that rotates as one with the take-up shaft and which can deform when a twisting load exceeding a preset load is applied thereto, and a lock gear latched to the torsion shaft, wherein
• the lock plate is formed by press-punch and press-bend processing of a metal plate and has
• a lock that engages the take-up axis at one end thereof,
• a connecting portion that spans between the one end side and the other end side of the frame, the connecting portion being formed so that the one end side thereof is continuous with the lock and supports the lock,
• a temporary retaining unit that is formed facing the frame and continuous with the connecting portion, and which comes into contact with the frame in the spanning direction of the connecting portion and prevents the lock plate from slipping from the frame,
• and a lock arm formed in the vicinity of the temporary retaining unit and continuous with the connecting portion and having a shaft holder;
• the lock is formed to be larger along a widthwise direction that is the direction perpendicular to the spanning direction and the thickness direction of the connecting portion than the measurement of the connecting portion along the widthwise direction, and the surface in the thickness direction of the connecting portion and the cut surfaces of the lock surface on the side of the connecting portion are made to be substantially parallel;
• and the lock is axially supported to be turnable inside a notch formed in the frame by an axial support component attached to the frame, and the lock plate is axially supported to be turnable, and when the lock plate turns, the lock comes into contact with an edge portion of the cutout;
• the torsion shaft further comprises a biasing mechanism that biases the take-up shaft and the lock gear in the direction for taking up the webbing belt;
• and
• the shaft holder of the lock arm is rotatably supported inside another cutout formed in the frame by a support shaft provided on the biasing mechanism.