Tonneau cover system with integral side rail clamp
A tonneau cover system for a pickup truck cargo box comprising a tonneau cover sized and shaped for covering the cargo box. A side rail comprises a first clamping surface adapted to engage the first side of the downward flange. A rod has a rod axis and is mounted on the side rail. A clamp body is mounted on the rod and includes a clamp arm having a second clamping surface adapted to engage the second side of the side rail. A cam is included with one of the side rail and the clamp body. A cam follower engages with the cam. The cam follower is included with the other one of the side rail and the clamp body. Movement of the clamp body along the axis of the rod advances the cam follower along the cam to thereby move the first clamping surface toward the downward flange.
1. A tonneau cover system for a cargo box of a pickup truck, the cargo box comprising a side wall including a downward flange having a first side facing the cargo box and a second side opposite to the first side, the tonneau cover system comprising:
a tonneau cover sized and shaped for covering the cargo box;
a side rail mountable to the side wall to support the cover, the side rail comprising a first clamping surface adapted to engage the first side of the downward flange;
a rod having a rod axis and mounted on the side rail;
a clamp body mounted on the rod and including a clamp arm having a second clamping surface;
a cam included with one of the side rail and the clamp body; and
a cam follower for engaging with the cam, the cam follower included with the other one of the side rail and the clamp body;
wherein movement of the clamp body along the axis of the rod advances the cam follower along the cam to thereby move the first clamping surface toward the downward flange.
2. The tonneau cover system of claim 1 , wherein the second clamping surface is adapted to engage the second side of the side rail.
3. The tonneau cover system of claim 1 , wherein the second clamping surface is adapted to engage an undersurface of a ledge of the cargo box sidewall.
4. The tonneau cover system of claim 1 , wherein:
the second clamping surface is adapted to engage the second side of the side rail;
the clamp arm further includes a third clamping surface adapted to engage an undersurface of a ledge of the cargo box sidewall; and
movement of the clamp body along the axis of the rod advances the cam follower along the cam to thereby move the third clamping surface toward the undersurface of the ledge of the cargo box sidewall.
5. The tonneau cover of claim 4 , wherein at least one of the second clamping surface and the third clamping surface includes a flexible member.
6. The tonneau cover system of claim 1 , wherein:
the cam is included with the side rail; and
the cam follower is included with the clamp body.
7. The tonneau cover system of claim 1 , wherein the cam is part of the side rail.
8. The tonneau cover system of claim 1 , further comprising a ramp body, said cam being formed in the ramp body, and wherein the side rail includes a channel, said ramp body being received in said channel.