The ornamental design for a locking-closing device, as shown and described.
FIG. 1 is a front, top and right side perspective view of a locking-closing device showing the new design with a coupling plate and receiving plate shown in broken lines.
FIG. 2 is a top view thereof.
FIG. 3 is a left side view thereof.
FIG. 4 is a right side view thereof.
FIG. 5 is a front view thereof.
FIG. 6 is rear view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines in FIG. 1 depict plates that form no part of the claimed design.
The broken lines in FIGS. 2, 6 and 7 depict flow or control passages that form no part of the claimed design.