A system (1) for detecting the breakage of rollers of continuous roller conveyors, particularly for kilns and dryers for the ceramics industry.The continuous conveyor (100) is of the type that comprises a structure (101) for supporting at least one conveyance surface (102) which comprises a plurality of rollers (103) that are arranged so that their corresponding longitudinal axes (A) are substantially parallel and juxtaposed along a transfer direction (T) that is substantially transverse to the longitudinal axes (A) of the rollers, each roller (103) having a first end (104) associated with means for rotational actuation (105) about its own longitudinal axis (A) and a second end (106), arranged opposite the first end, which is supported so that it can rotate freely; the system (1) comprises a main cable (2) which is adapted to be arranged in an upper region proximate to, but not in contact with, the idle second ends (106) of the rollers (103) of the at least one conveyance surface (102), and which is made of an electrically conducting material and has a characteristic value (V) of electrical resistance per unit of length; the main cable (2) therefore has a maximum value (V) of electric resistance that corresponds to its total length (L); the system (1) further comprises a plurality of contact elements (3) made of electrically conducting material, which are distributed along the main cable (2) and are arranged above it and not in contact with it; following the breakage of a roller (103) the inclination of the corresponding second end (106) is adapted to interfere with the main cable (2) until it is brought into contact with at least one of the contact elements (3); the system (1) further comprises a secondary cable (9) made of electrically conducting material which is electrically connected in series to the plurality of contact elements (3), means for detecting (10) a value (V) of electrical resistance referred to the main cable (2), which are electrically connected to the main and secondary cables (2, 9), in the event of breakage of a roller (103) the value (V) detected by the means for detecting (10) being lower than the maximum value (V) and corresponding to the length (L) of the portion of main cable (2) comprised between the means for detecting proper and the contact element (3) on which the cable abuts, and processing means (11) which are adapted to compare the detected value (V) with the maximum value (V) and, if a difference is detected, to deactivate the means for rotational actuation (105).
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