| 摘要 |
PROBLEM TO BE SOLVED: To facilitate fixing and removal of a beam member and a frame body part by providing the frame body with a stopping means and securing a stopping means provided for the beam member removably thereto. SOLUTION: A protrusion 4 provided for a U-shaped stopper claw 3 is engaged with a stop window 2 provided at a frame body part 5 to restrict downward movement of the claw 3. A fitting part 20 made in a beam member 8 is fitted in a cut 1 made in the frame body part 5 to restrict movement of the claw 3. A resilient U-shaped part of the claw 3 is fitted in the cavity at the frame body part 5 where the U-shaped part presses the inner surface of the frame body part 5 to restrict the movement thereof thus securing the beam member 8 to the frame body part 5 without requiring any screw. According to the structure, fixing an removing work is facilitated and workability is enhanced.
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