Device for laterally guiding an endless conveyor belt of a trough conveyor

A lateral guide device for laterally guiding an endless conveyor belt of a trough conveyor, the device comprising:

• a support;
• an idle guide roller which is able to be mounted in a removable manner on the support between a first part that makes it possible to support, in an operational position, a first end of the an axle of the roller at an upper point and a second part that makes it possible to support a second end of the axle of the roller at a lower point, wherein the first part of the support is movable between said operational position and a retracted position;
• and
• a lock which locks the first part in said operational position, and wherein once the first part is locked in said operational position and the roller is mounted on the support, the first part can be unlocked and can be completely disengaged from the first end of the axle of the roller and brought into said retracted position,
• wherein the support comprises a retaining element which, when the first part of the support is brought into the retracted position and does not support the roller vertically retains the roller in a removal position in which the second end of the axle of the roller is supported at the lower point by the second part of the support.