Corner clamp, a method of producing such a corner clamp, and a box structure

A corner clamp (1) for interconnecting a first wall element of a box structure to a second wall element of said box structure, said corner clamp (1) comprising:

• a first portion (2) having a first wall (3), a second wall (4) and an interconnecting portion (5) that interconnects the first wall (3) with the second wall (4), wherein the first wall (3), the second wall (4) and the interconnecting portion (5) together define a U-shaped cross-section,
• a second portion (6) having a first wall (7), a second wall (8) and interconnecting portion (9) that interconnects the first wall (7) with the second wall (8), wherein the first wall (7), the second wall (8) and the interconnecting portion (9) together define a U-shaped cross-section, and
• an interconnection member (10) which interconnects the first portion (2) with the second portion (6),
• wherein, in an operative position in which the corner clamp (1) interconnects a first and a second wall element (21, 22) of a box structure, the first portion (2) is configured to enclose a part of the first wall element (21) between its first wall (3) and its second wall (4), and the second portion (6) is configured to enclose a part of the second wall element (22) between its first wall (7) and its second wall (8), and
• along at least one of the first wall (3, 7) and second wall (4, 8) of the first portion (2) or the second portion (6), there is provided at least one barb (11) on an inner side of said wall (3, 4, 7, 8), said barb (11) having a tip (12) pointing in a direction towards the interconnecting portion (5, 9) that interconnects said first and second wall (3, 4, 7, 8).