Abstract: A roller device mountable rotatably on a spindle includes a roller body having a tubular wall with two opposite open-end portions. Each open-end portion is provided with a retaining member formed on an inner peripheral surface of the tubular wall. Two covers are inserted respectively into the open-end portions of the tubular wall, and are adapted to be sleeved rotatably around the spindle. Each cover has an annular end wall transverse to the corresponding open-end portion, a surrounding wall extending inwardly and axially from an outer periphery of the end wall and abutting against the inner peripheral surface of the tubular wall, and an engaging member formed on an outer peripheral surface of the surrounding wall and interlocking the retaining member. The retaining and engaging members have recess-and-protrusion interlocking surfaces.

Abstract: A weather-resistant roller device for a conveyer includes a roller body which has two axially opposite end walls respectively having indented wall regions each confining a receiving groove, a spindle supporting the roller body and having two engaging parts each projecting out of a respective end wall, bearing assemblies sleeved on the spindle, two anti-leak assemblies each provided in a respective receiving groove, and two protective caps each covering a respective engaging part. Each anti-leak assembly has an outer fixed seal member disposed annularly around the spindle and extending from the spindle to a respective indented wall region. Each protective cap has an inner skirt abutting sealingly against the outer fixed seal member of a respective anti-leak assembly, and a hollow neck extending outwardly from the inner skirt and receiving fittingly a respective engaging part.

Abstract: A roller device mountable rotatably on a spindle includes a roller body having a tubular wall with two opposite open-end portions. Each open-end portion is provided with a retaining member formed on an inner peripheral surface of the tubular wall. Two covers are inserted respectively into the open-end portions of the tubular wall, and are adapted to be sleeved rotatably around the spindle. Each cover has an annular end wall transverse to the corresponding open-end portion, a surrounding wall extending inwardly and axially from an outer periphery of the end wall and abutting against the inner peripheral surface of the tubular wall, and an engaging member formed on an outer peripheral surface of the surrounding wall and interlocking the retaining member. The retaining and engaging members have recess-and-protrusion interlocking surfaces.

Abstract: A weather-resistant roller device for a conveyer includes a roller body which has two axially opposite end walls respectively having indented wall regions each confining a receiving groove, a spindle supporting the roller body and having two engaging parts each projecting out of a respective end wall, bearing assemblies sleeved on the spindle, two anti-leak assemblies each provided in a respective receiving groove, and two protective caps each covering a respective engaging part. Each anti-leak assembly has an outer fixed seal member disposed annularly around the spindle and extending from the spindle to a respective indented wall region. Each protective cap has an inner skirt abutting sealingly against the outer fixed seal member of a respective anti-leak assembly, and a hollow neck extending outwardly from the inner skirt and receiving fittingly a respective engaging part.