The ornamental design for a volleyballtrainer, as shown and described.
FIG. 1 is a front perspective view of a volleyball trainer according to the present invention.
FIG. 2 is a top right perspective view of the volleyball trainer according to the present invention.
FIG. 3 is a right side view of the volleyball trainer, the left side view being identical, according to the present invention.
FIG. 4 is a front view of the volleyball trainer, the back view being identical, according to the present invention.
FIG. 5 is a top view of the volleyball trainer according to the present invention; and,
FIG. 6 is a bottom view of the volleyball trainer according to the present invention.
The broken lines on the claimed volleyball trainer, in FIGS. 1-6, depict portions that form no part of the claimed design. The remaining broken lines, in FIG. 1, depict environmental structure and form no part of the claim.