The ornamental design for a shower cubicle, as shown and described.
1. Shower cubicle
1.1 : Perspective front view of cubicle right side
1.2 : Top view of the cubicle
1.3 : Perspective rear view of cubicle left side
1.4 : Front elevated view of the cubicle
1.5 : Left lateral elevated view of cubicle
1.6 : Rear elevated view of the cubicle
1.7 : Bottom view of the cubicle
Shower cubicle with rotating cylinder for transporting persons with reduced mobility, whose cylinder occupies the front of the cubicle, accessing it through a double-leaf side door; the cylinder is mounted on a lower axle anchored to the floor that crosses the shower tray and its base, forming a cavity to house transmission elements, to allow the rotation of the cylinder of the lower axle and upper axle; at the rear, a vertical pipe protrudes from the controls and bends into a horizontal section that ends at the top of the cylinder for connecting to the shower.
The broken lines in the drawings illustrate portions of the shower cubicle and form no part of the claimed design.