Patent ID: 8540179
Filing Date: 2013-09-24
Classification: B60R

Abstract:
1. A webbing take-up device comprising: a spool that takes up and stores a long band-shaped webbing from a length direction base end side of the webbing by rotating in a take-up direction, and that is rotated in a pullout direction opposite to the take-up direction by the webbing being pulled towards a leading end side; a first energy absorbing member inserted into a first insertion hole formed in the spool at a position separated in a radial direction from a central axis of the spool and opening at a first axial direction end of the spool; a second energy absorbing member inserted into a second insertion hole formed at a different position in the spool from the forming position of the first insertion hole, at a position separated in a radial direction from the central axis of the spool and opening at the first axial direction end of the spool; a coupling member coupled to a portion at a second axial direction end of the spool or at an intermediate axial direction portion of the spool, such that the coupling member is not able to perform relative rotation with respect to the spool; a lock unit comprising a lock base and restricting rotation of the lock base when actuated, wherein the lock base: is provided at the first axial direction end side of the spool so as to be rotatable relative to the spool, is coupled through the coupling member to the spool so as to be non-rotatable relative to the spool, retains base end portions of the first energy absorbing member and the second energy absorbing member, by relative rotation with respect to the spool in the take-up direction, engages the first energy absorbing member with the spool and deforms the first energy absorbing member along the spool circumferential direction while pulling the first energy absorbing member out from the first insertion hole such that the first energy absorbing member is coiled on a front face of the lock base, and by relative rotation with respect to the spool in the take-up direction, engages the second energy absorbing member with the spool and deforms the second energy absorbing member along the spool circumferential direction while pulling the second energy absorbing member out from the second insertion hole such that the second energy absorbing member is coiled on a front face of the lock base; wherein the base end portion of the second energy absorbing member is retained at the first axial direction end of the spool by a second retaining portion of the lock base at a position separated further toward to the rotation radial direction outside from the central axis of the spool than a distance from the central axis of the spool to the first insertion hole opening position at the first axial direction end of the spool, and the base end portion of the first energy absorbing member is retained at the first axial direction end of the spool by a first retaining portion of the lock base at a position separated further toward the rotation radial direction outside from the central axis of the spool than a distance from the central axis of the spool to the second insertion hole opening position at the first axial direction end of the spool, and wherein when the first and second retaining portions and first and second insertion holes are not superimposed with each other along an axial direction when the first and second retaining portions and first and second insertion holes are aligned with each other along a radial direction of the spool.