assembly 41 on the spring arm support 29 the spring arm assembly 41 includes a helical spring portion 42 through which the machine screw and nut assembly 39 extends and a rod portion 43 extending from the helical spring portion 42 to which the blade 15 is secured by suitable fasteners the pivotable collar 24 retains a first end 48 of the support member and includes a rim 51 extending through a circular opening 50 formed in a reinforcement plate 52 the reinforcement plate 52 is a rigid member fastened to the side of the conveyor which is capable of withstanding the stresses applied to the cleaner 10 during operation and adjustment of the same in the disclosed embodiment the pivotable collar 24 includes a square opening 53 for receiving the first end 48 of the support member 18 the support member 18 is secured within the square opening 53 by means of set screws 54 in the disclosed embodiment but may be otherwise anchored to the pivotable collar 24 the locking collar 25 retains the support member 18 near the second end 56 of the support member the locking collar 25 has an annular rim 57 generally l shaped in cross section which extends through an opening 58 in the cover plate 59 the cover plate 59 is provided to secure the cleaner 10 to the conveyor 12 on the opposite side of the conveyor from the pivotable collar 24 the cover plate 59 reinforces the conveyor 12 where the cleaner 10 is attached the locking collar 25 is split into an upper portion 61 and a lower.