| 摘要 |
PROBLEM TO BE SOLVED: To prevent the leakage of foaming heat-insulating material more certainly. SOLUTION: At the gate 7 of a heat insulating box, decorative frames 6 are mounted on its four sides, while L-shaped corner boards 14 are attached to its corners. A sheet 18 consisting of rubber material nonpermeable and abundant in elasticity is stuck to the rear of the corner board 14, and is fixed by rivets 29. An L-shaped corner cover 21 is attached, spreading over the edge of the decorative frame 6 from the corner board 14. The corner cover 21 is fixed by the lock piece 24 projected at the rear being inserted into the lock hole 17 of the corner board 14 while drawing the sheet 18 and the lock tooth 27 being caught at the brim of the lock hole 17. After that, the box is filled with foaming heat-insulating material between an outer box and an inner box, and at that time, the occurrence of the leakage of the foaming heat-insulating material is prevented because the sections where space can arise at the corners of the gate 7 are all blocked with nonpermeable sheets 18.
|
