FIELD: transport. ^ SUBSTANCE: invention relates to conveyor and handling machine retainers. Proposed roller retainer comprised stationary circular housing 1 accommodating sleeve 3 with wedge-like slits fitted on shaft 2 to rotate thereon. Said wedge-like slits accommodate jamming elements made up of slides 5 interacting with wedge-like slit and housing inner surface. Slides have flat surface on sleeve side and curved on housing side along radius equal to that of housing inner surface. ^ EFFECT: higher braking moment developed by retainer. ^ 1 dwg
