Cargo bed for utility vehicle

1. A cargo bed for a utility vehicle comprising a bottom plate, and a pair of right and left side walls extending upward from right and left ends of the bottom plate,

each of the side walls including:

a front pillar extending vertically at a front end of the bottom plate and configured by a pipe member;

a rear pillar extending vertically at a rear end of the bottom plate and configured by a pipe member;

a side panel extending between the front pillar and the rear pillar in an anteroposterior direction and having a rib extending in the anteroposterior direction; and

a bed rail positioned above the side panel with a space being provided therebetween, and extending between the front pillar and the rear pillar in the anteroposterior direction, wherein

the front pillar, the rear pillar, the side panel, and the bed rail are each made of metal, and

the side panel has a front end firmly fixed to a rear end surface of the front pillar by welding and a rear end firmly fixed to a front end surface of the rear pillar by welding.

2. The cargo bed for a utility vehicle according to claim 1 , wherein the bed rail is firmly fixed to the rear end surface of the front pillar and the front end surface of the rear pillar by welding and without being supported at any positions between front pillar and the rear pillar.

3. The cargo bed for a utility vehicle according to claim 1 , wherein the bed rail is configured to be inserted into sections of the front pillar and the rear pillar and be detachably attached to the front pillar and the rear pillar.

4. The cargo bed for a utility vehicle according to claim 3 , wherein the bed rail is configured to have a shiftable vertical position.

5. The cargo bed for a utility vehicle according to claim 1 ,

wherein the side panel has an upper end having a cornered U section or a closed section extending in the anteroposterior direction, and

wherein the upper end of the side panel is provided with at least one hook.