Foldable Container

A plastic corrugated folding container comprising:

• a first side panel (3),
• provided connectedly to each of two sides of a floor panel (2), with a folding line (1A) interposed therebetween,
• provided with a lower short side panel (3A), with an incision (3b) interposed therebetween, and
• provided with an upper short side panel (3B), with an incision (3c) interposed therebetween,
• wherein an incision (3a) is formed at a position midway in the height direction of each first side panel (3) excluding the lower short side panel (3A) and the upper short side panel (3B);
• a latch side panel (6) having an engaging hole (6A, 6A), formed on each of two ends of the floor panel (2), with a folding line (2B) interposed therebetween;
• a pair of second side panels (4) attached to the floor panel (2),
• wherein
• an upper part piece (4A) is formed on an upper part of each second side panel with an incision (4a) interposed therebetween, and
• an engaging piece (4B, 4B) is provided on a lower part of each second side panel with a folding line (4D) interposed therebetween;
• column members (7) for supporting end parts of the first side panels (3), wherein
• each column member has
• a sandwiching piece (7a) provided with a stopper (7e) and being substantially U-shaped in cross section,
• a connecting piece (7b), and
• an abutting piece (7d) continuous with the connecting piece (7b),
• each column member (7) is separated into upper and lower column members across the incision (3a) of each first side panel (3), and
• end parts of each first side panels (3) are firmly fixed by being sandwiched in the column members (7),
• wherein
• each of the incisions enables flat folding,
• a horizontal face (k1) and a vertical face (s) are provided at both ends of the lower short side panel (3A) of each first side panel (3),
• an inclined face (α2) and a vertical face (k) are formed at both ends of each latch side panel (6) for the floor panel (2),
• the first side panels (3, 3) and the latch side panels (6, 6) are configured to bend in an inward direction, by applying a heating bar set to a prescribed temperature to each of the folding lines (1A) and each of the folding lines (2B) of the floor panel (2) and,
• the engaging pieces (4B) are configured to bend in an outward direction, by applying a heating bar set to a prescribed temperature to the folding line (4D) of each second side panels (4), and
• the engaging piece (4B) of each second side panel (4) is configured to engage with each engaging hole (6A) of the latch side panel (6), to form a box body.