Patent ID: 11952165
Assignee: nan
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 16:
17. The assembled unit according to claim 1, wherein the assembled unit further comprises a third plate member, which is disposed between the pair of first plate members, wherein:
both ends of each third plate member is insertable inserted into the corresponding sliding grooves of the lateral guide rails and slid freely along the sliding groove;
on a surface of each third plate member, a second engaging slot is disposed in a direction parallel to the lateral guide rail;
the second engaging slot extends across a whole surface of the third plate member and matches the position of the engaging slot on an adjacent plate member; and
the sliding block of the spine member can slidably fit with the second engaging slot, such that the spine member can be slid along the second engaging slot but is locked in a direction perpendicular to the surface of the corresponding plate member.