Roller conveyor motorized roller and roller conveyor device using the same
A motorized conveyor roller prevents slip between a power transmission mechanism in a roller tube and the roller tube due to aging. The power transmission mechanism includes a first closed-bottom cylindrical member fit over a second closed-bottom cylindrical member and a bolt for axially pressing the members against one another. The first member receives torque from a motor and a double-sided tape is laid on an outer surface of the first member. Facing surfaces of the first and second members are tapered, and the circumferential wall with the double-sided tape is expandable diametrically. The bolt diametrically expands the circumferential wall pressed by the tapered surface. Thus, an adhesive force of the double-sided tape sandwiched between the circumferential wall and the roller tube is exerted to adhere the outer surface of the first member to an inner surface of a roller tube.
1. A roller conveyor motorized roller, comprising:
a roller tube pivotally supported by a pair of support shafts erected so as to oppose each other from a pair of conveyor frames;
a motor fixed to one of the support shafts in the roller tube; and
a power transmission mechanism which is provided in the roller tube and which transmits torque of the motor to the roller tube,
the power transmission mechanism including:
first and second members which are respectively formed in a closed-bottom cylindrical shape and one of which is fitted into the other of which;
a screwing member for axially pressing the second member against the first member that receives torque from an output shaft of the motor; and
a pressure-sensitive adhesive layer laid on an outer circumferential surface of a circumferential wall of the member to be positioned on an outer circumferential side among the first and second members one of which is fitted into the other of which, and
the power transmission mechanism being configured such that at least one of surfaces, which face each other, of circumferential walls of the first and second members is formed in a tapered shape, the circumferential wall where the pressure-sensitive adhesive layer is laid is formed so as to be expandable in diameter, the diameter of the circumferential wall pressed by the tapered surface due to pressing by the screwing member expands, and an adhesive force of the pressure-sensitive adhesive layer is exerted to adhere the outer circumferential surface of the first member or the second member and an inner circumferential surface of the roller tube to each other.
2. The roller conveyor motorized roller according to claim 1 , wherein the power transmission mechanism has a reduction mechanism between the motor and the first member.
3. The roller conveyor motorized roller according to claim 1 , wherein on the outer circumferential surface of the first or second member on which the pressure-sensitive adhesive layer is laid in the power transmission mechanism, a rubber damper layer is first laminated and then the pressure-sensitive adhesive layer is laid.
4. A roller conveyor device that uses the roller conveyor motorized roller according to claim 1 .