Panel locking structure for cargo bed of vehicle

1. A panel locking structure for a cargo bed of a vehicle, comprising:

a cargo bed having an openable and closable gate-type tail panel at a rear end of said cargo bed and a side panel adjacent to said gate-type tail panel in a width direction of the vehicle, said gate-type tail panel and said side panel being separate, discrete panels; and

a panel locking mechanism for holding said gate-type tail panel in a closed position, said panel locking mechanism including:

a locking lever pivotably supported on a rear surface of said gate-type tail panel via a bracket and a vertical support shaft, said rear surface of said gate-type tail panel having a bump located between said locking lever and a rear end surface of said side panel;

a substantially U-shaped movable hook made of spring steel, said movable hook having a first end pivotably supported at a midsection of said locking lever, a second end opposite said first end, and a straight section; and

a stationary hook fixed to said rear end surface of said side panel and configured to engage said second end of said movable hook;

wherein, in a locked state in which said gate-type tail panel is in a closed position, a rear surface of said bump is within a plane of said rear end surface of said side panel, said second end of said movable hook is engaged with said stationary hook of said side panel and a pulling force is applied to said movable hook by pivoting said locking lever in a locking direction, a midsection of said straight portion of said movable hook with respect to a longitudinal direction of said movable hook directly presses onto said rear surface of said bump of said gate-type tail panel so as to press said gate-type tail panel in a forward direction of said cargo bed by a resilient force.

2. The panel locking structure according to claim 1 , wherein said side panel is one of a pair of side panels located on opposite side of said gate-type tail panel, each of said side panels has a metal core at a rear end thereof, said stationary hook being mounted on said metal core of a respective one of said side panels.

3. The panel locking structure according to claim 1 , wherein said panel locking mechanism is mounted on an inclined surface of said gate-type tail panel, said inclined surface being inclined forward relative to a perpendicular plane along a rear end face of said gate-type tail panel.

4. The panel locking structure according to claim 1 , wherein, when viewed from a pivoting axis-direction of said movable hook, said straight portion of said movable hook is formed substantially linearly, and a portion of said movable hook closer to said first end of said movable hook is curved and projects in a direction away from said gate-type tail panel.

5. The panel locking structure according to claim 1 , wherein said gate-type tail panel has a recess for accommodating an accessory, said recess being recessed outward of said cargo bed.

6. The panel locking structure according to claim 1 , wherein said side panel is a first one of a pair of opposing side panels, an inner surface of each of said side panels having a plurality of grooves for engaging a partitioning plate inserted from an upper end of each of said panels to a lower end of each of said panels.

7. The panel locking structure according to claim 1 , wherein, when viewed from above, said midsection of said straight portion of said movable hook with respect to a longitudinal direction of said movable hook directly presses onto said rear surface of said bump of said gate-type tail panel so as to press said gate-type tail panel inward of said cargo bed by a resilient force.