Patent ID: 7073660

Claim:
A belt curve conveyor comprising a number of guide wheel units provided in proximity to the peripheral part of a fan-type belt slung over between tapered end pulleys of a drive side and a driven side, wherein an approximately semicircular profile is formed on both front and rear surfaces of the peripheral part of the belt in such a manner to abut on the guide wheels, said guide wheel units comprise a first guide wheel and a fourth guide wheel abutting the outside face edge of a carrier belt and a return belt, and a second guide wheel and a third guide wheel abutting the inside face edge of a carrier belt and a return belt; said first guide wheel and fourth guide wheel are supported by upper and lower horizontal edges of a holder member secured to an outer peripheral part of a base while said second guide wheel and third guide wheel are supported by upper and lower edges of a rotation axis bracket rotatably secured to the inner center of the holder member wherein a spacer rubber or a rubber bush for biasing each wheel in the radial direction, that is, the lateral direction, is engaged into an inner race of a rolling bearing in each guide wheel in such a manner to penetrate a supporting bolt into the spacer rubber or the rubber bush to be fixed to the upper and lower edges of the holder member or the bracket; and a rotary lock part provided at the inner center of the holder member around a same axis of the rotation axis of the bracket while a keyhole formed at the outer surface thereof so as to be engaged with a key part arranged at the end of a detachable lock handle so that the second guide wheel and the third guide wheel become separated from the inner surface of the belt by means of inserting the key part of the lock handle in the lock part, pressing and turning the lock to rotate the bracket in the same direction by 90 degrees, which enables the belt to be removed.