Twist lock accessory rack system

1 . An accessory rack system comprising:

a frame rail adapted to couple to a side wall of a cargo area, the frame rail comprising:

one or more frame rail locking features, and

a tonneau cover support portion adapted for supporting a tonneau cover over the cargo area;

at least one post engageable with the frame rails, the at least one post comprising one or more post locking feature extending from an end of the at least one post; and

wherein one of the post locking features is inserted into one of the frame rail locking features in a direction orthogonal to a longitudinal direction of the frame rail and, with rotation of the at least one post, rotates into locking engagement with the one of the frame rail locking features so that the at least one post is prevented from disengaging from the frame rail and/or prevented from longitudinal translation along the frame rail, and

wherein the one or more frame rail locking features include a track extending at least partially the length of each of the frame rail and the one or more post locking features include a wedge extending from an end of the at least one post; and wherein the track accepts the wedge.

2 . The accessory rack system according to claim 1 , wherein the track is accessible through an opening defined between two opposing flanges; and wherein the width of the track is greater than the width of the opening.

3 . The accessory rack system according to claim 2 , wherein the width of the wedge is generally equal to or less than the width of the opening; wherein the wedge is locatable within the track through the opening by aligning the width of the wedge with the width of the opening; and wherein the length of the wedge is generally equal to the width of the track.

4 . The accessory rack system according to claim 3 , wherein the wedge comprises two opposing rounded corners and two opposing squared corners; wherein by twisting the wedge the two opposing rounded corners slide against opposing surfaces of the track and the two opposing squared corners preclude further rotation of the wedge.

5 . The accessory rack system according to claim 4 , wherein at least one edge of the wedge is beveled so that twisting the wedge into locking engagement with the track causes a surface of the track to translate along the at least one beveled edge and frictionally engage with the wedge.

6 . The accessory rack system according to claim 5 , wherein the wedge is translatable along the length of the track when not in a locked engagement with the track.

7 . An accessory rack system comprising:

a frame rail adapted to couple to a side wall of a cargo area, the frame rail comprising:

one or more frame rail locking features, and

a tonneau cover support portion adapted for supporting a tonneau cover over the cargo area;

at least one post engageable with the frame rails, the at least one post comprising one or more post locking feature extending from an end of the at least one post; and

wherein one of the post locking features rotates into locking engagement with one of the frame rail locking features so that the at least one post is prevented from disengaging from the frame rail and/or prevented from longitudinal translation along the frame rail;

wherein the frame rail comprises a first frame rail locking feature and one or more second frame rail locking features; and

the at least one post comprises a first post locking feature and a second post locking feature.

8 . The accessory rack system according to claim 7 , wherein the first frame rail locking feature includes a track and the one or more second frame rail locking features include one or more holes disposed at one or more locations along the length of the frame rail; and wherein the first post locking feature includes a wedge that is engageable with the track, and the second post locking feature includes a bracket having a hole that is coaxially alignable with the holes of the one or more second frame rail locking features.

9 . The accessory rack system according to claim 8 , wherein twisting of the at least one post relative to the frame rail causes the hole of the bracket to align coaxially with the holes of the one or more second frame rail locking features.

10 . The accessory rack system according to claim 9 , wherein the accessory rack system comprises a locking member; wherein the locking member comprises a pin and a handle extending from an end of the pin; wherein the pin extends through the hole of the bracket and into the hole of the one or more second frame rail locking features; and wherein the handle assists a user twist the pin.

11 . The accessory rack system according to claim 10 , wherein the pin of the locking member is insertable into the second post locking feature and the one or more second frame rail locking features upon the coaxial alignment of the hole of the bracket with the holes of the one or more second frame rail locking features; and wherein the locking member prevents rotation of the wedge within the track.

12 . The accessory rack system according to claim 11 , wherein the one or more holes of the one or more second frame rail locking features comprise one or more groove guides extending from an inner surface of the one or more holes and the pin comprises one or more grooves formed into the pin; and wherein the one or more grooves are adapted to accept the one or more groove guides.

13 . The accessory rack system according to claim 12 , wherein the one or more grooves extend in a first direction along a length of the pin and then in a second direction along a circumference of the pin such that translating the one or more groove guides within the one or more grooves in the second direction prevents axial displacement of the at least one post from the frame rails.

14 . The accessory rack system according to claim 13 , wherein the second direction is oriented generally 90° to the first direction.

15 . The accessory rack system according to claim 1 , wherein the engagement of the at least one post with the frame rail does not interfere with the supporting of a tonneau cover by the frame rail or a folding operation of the tonneau cover.

16 . The accessory rack system of according to claim 1 , further comprising a cross bar connected to and extending from the at least one post.