The ornamental design for a checklanestructure, as shown and described.
FIG. 1 is perspective view of a check lane structure;
FIG. 2 is a right side view of the check lane structure thereof;
FIG. 3 is a left side view of the check lane structure thereof;
FIG. 4 is a front view of the check lane structure thereof;
FIG. 5 is a back view of the check lane structure thereof;
FIG. 6 is a top view of the check lane structure thereof;
FIG. 7 is a bottom view of the check lane structure thereof; and,
FIG. 8 is an enlarged section view of the check lane structure thereof.
The broken lines shown are included for the purpose of illustrating portions of the check lane structure that form no part of the claimed design. The concentric circles representing a bullseye design and shown in broken lines is a registered trademark of Target Brands, Inc.