The ornamental design for a rainchaincomponent, as shown and described.
FIG. 1 is an upper perspective view of a rain chain component;
FIG. 2 is a lower perspective view of the rain chain component;
FIG. 3 is a side elevational view of the rain chain component;
FIG. 4 is an opposite side view of FIG. 3 of the rain chain component;
FIG. 5 is a front view of the rain chain component;
FIG. 6 is a rear view of the rain chain component;
FIG. 7 is a top view of the rain chain component;
FIG. 8 is a bottom view of the rain chain component; and,
FIG. 9 is an upper perspective view of the rain chain component shown in the position of use, interconnected to multiple components to form a rain chain, the broken line for the purpose of illustrating environment only that form no part of the claim.