FIG. 1 is a perspective view of a shelf unit in accordance with the invention;
FIG. 2 is a front elevational view of the shelf unit thereof;
FIG. 3 is an end elevational view of the shelf unit thereof;
FIG. 4 is a rear elevational view of the shelf unit thereof;
FIG. 5 is a top plan view of the shelf unit thereof;
FIG. 6 is a bottom plan view of the shelf unit thereof;
FIG. 7 is a perspective view of a second embodiment of the shelf unit shown in FIG. 1;
FIG. 8 is a front elevational view of the shelf unit thereof;
FIG. 9 is an end elevational view of the shelf unit thereof;
FIG. 10 is a rear elevational view of the shelf unit thereof;
FIG. 11 is a top plan view of the shelf unit thereof;
FIG. 12 is a bottom plan view of the shelf unit thereof;
FIG. 13 is a perspective view of a third embodiment of the shelf unit shown in FIG. 1;
FIG. 14 is a front elevational view of the shelf unit thereof;
FIG. 15 is an end elevational view of the shelf unit thereof;
FIG. 16 is a rear elevational view of the shelf unit thereof;
FIG. 17 is a top plan view of the shelf unit thereof;
FIG. 18 is a bottom plan view of the shelf unit thereof;
FIG. 19 is a perspective view of a fourth embodiment of the shelf unit shown in FIG. 1;
FIG. 20 is a front elevational view of the shelf unit thereof;
FIG. 21 is an end elevational view of the shelf unit thereof;
FIG. 22 is a rear elevational view of the shelf unit thereof;
FIG. 23 is a top plan view of the shelf unit thereof;
FIG. 24 is a bottom plan view of the shelf unit thereof;
FIG. 25 is a perspective view of a fifth embodiment of the shelf unit shown in FIG. 1;
FIG. 26 is a front elevational view of the shelf unit thereof;
FIG. 27 is an end elevational view of the shelf unit thereof;
FIG. 28 is a rear elevational view of the shelf unit thereof;
FIG. 29 is a top plan view of the shelf unit thereof;
FIG. 30 is a bottom plan view of the shelf unit thereof;
FIG. 31 is a perspective view of a sixth embodiment of the shelf unit shown in FIG. 1;
FIG. 32 is a front elevational view of the shelf unit thereof;
FIG. 33 is an end elevational view of the shelf unit thereof;
FIG. 34 is a rear elevational view of the shelf unit thereof;
FIG. 35 is a top plan view of the shelf unit thereof;
FIG. 36 is a bottom plan view of the shelf unit thereof;
FIG. 37 is a perspective view of a seventh embodiment of the shelf unit shown in FIG. 1;
FIG. 38 is a front elevational view of the shelf unit thereof;
FIG. 39 is an end elevational view of the shelf unit thereof;
FIG. 40 is a rear elevational view of the shelf unit thereof;
FIG. 41 is a top plan view of the shelf unit thereof; and,
FIG. 42 is a bottom plan view of the shelf unit thereof.