Tonneau rail system and attachment device for securing a tonneau rail to a vehicle

1. A tonneau rail system comprising a tonneau rail and an attachment device that is configured to secure the tonneau rail to an accessory rail on a bed wall of a cargo area of a vehicle, the accessory rail comprises a channel that extends at least partially along a length of the bed wall, wherein the attachment device comprises an anchor, a clamp member, and a fastener that engages the anchor and the clamp member to secure the anchor and the clamp member to the channel of the accessory rail, and the clamp member is configured to clamp or press the tonneau rail directly or indirectly against the bed wall.

2. The tonneau rail system according to claim 1 , wherein the clamp member comprises an attaching member that is configured to engage the tonneau rail in a location above the channel of the accessory rail.

3. The tonneau rail system according to claim 2 , wherein the attaching member is configured to press the tonneau rail against a face of a bed cap or a face of the bed wall of the cargo area.

4. The tonneau rail system according to claim 3 , wherein the attaching member is configured to engage a first finger of the tonneau rail.

5. The tonneau rail system according to claim 4 , wherein the attaching member comprises a finger that is downwardly facing, and the first finger of the tonneau rail is upwardly facing.

6. The tonneau rail system according to claim 5 , wherein the tonneau rail comprises a second finger that is downwardly facing, and the attaching member is received between the first finger and the second finger of the tonneau rail.

7. The tonneau rail system according to claim 3 , wherein the anchor is configured to engage the accessory rail from inside the channel and the clamp member is configured to engage the accessory rail from outside the channel.

8. The tonneau rail system according to claim 7 , wherein the clamp member comprises an engagement member that is configured to be received into an opening in the accessory rail that is defined between two opposing tabs of the accessory rail.

9. The tonneau rail system according to claim 7 , wherein the anchor comprises a flange that is configured to be received into an opening in the accessory rail that is defined between two opposing tabs of the accessory rail.

10. The tonneau rail system according to claim 8 , wherein the anchor comprises flange that is configured to be received into the opening of the accessory rail.

11. The tonneau rail system according to claim 1 , wherein the anchor is configured to engage the accessory rail from inside the accessory rail and the clamp member is configured to engage the accessory rail from outside the accessory rail.

12. The tonneau rail system according to claim 11 , wherein the clamp member comprises an engagement member that is configured to be received into an opening in the accessory rail that is defined between two opposing tabs of the accessory rail.

13. The tonneau rail system according to claim 11 , wherein the anchor comprises a flange that is configured to be received into an opening in the accessory rail that is defined between two opposing tabs of the accessory rail.

14. The tonneau rail system according to claim 12 , wherein the anchor comprises a flange that is configured to be received into an opening in the accessory rail that is defined between two opposing tabs of the accessory rail, and the attachment device is configured to press the tonneau rail against a face of a bed cap or a face of the bed wall of the cargo area.

15. The tonneau rail system according to claim 12 , wherein the anchor comprises one or more angled walls for engaging opposing inside surfaces of the channel of the accessory rail.

16. An attachment device that is configured to secure an accessory to an accessory rail that is attached to a bed wall of a cargo area of a vehicle, wherein the accessory rail comprises a channel that extends at least partially along a length of the bed wall, wherein the attachment device comprises an anchor, a clamp member, and a fastener that engages the anchor and the clamp member to secure the anchor and the clamp member to the accessory rail, wherein the accessory is clamped or pressed directly or indirectly against the bed wall by the clamp member, wherein the clamp member comprises an attaching member that is configured to engage the accessory in a location above the channel of the accessory rail and press the accessory against a face of a bed cap or a face of the bed wall of the cargo area.

17. The attachment device according to claim 16 , wherein the anchor is configured to engage the accessory rail from inside the accessory rail and the clamp member is configured to engage the accessory rail from outside the accessory rail.

18. The attachment device according to claim 16 , wherein the clamp member comprises an engagement member that is configured to be received into an opening in the accessory rail that is defined between two opposing tabs of the accessory rail, and the anchor comprises a flange that is configured to be received into the opening in the accessory rail, and the attaching member is configured to press a tonneau rail against a face of a bed cap or a face of the bed wall of the cargo area.

19. An attachment device that is configured to secure an accessory to an accessory rail that is attached to a bed wall of a cargo area of a vehicle, wherein the accessory rail comprises a channel that extends at least partially along a length of the bed wall, wherein the attachment device comprises an anchor, a clamp member, and a fastener that engages the anchor and the clamp member to secure the anchor and the clamp member to the accessory rail, wherein the accessory is clamped or pressed directly or indirectly against the bed wall by the clamp member, wherein the anchor comprises one or more angled walls for engaging opposing inside surfaces of the channel of the accessory rail.