| 摘要 |
<p>A device comprising a frame (3) composed of lengths of tubing (2) and coupling pieces (4) interconnecting the same, coupling piece and coupling piece parts for the same, each coupling piece having a cubical body (9) provided on each outer face with a recess (28) with undercut engaging rims for receiving a base part (35) of an arm (11) connected with a tubing (2) and having complementary engaging rims (35) in a manner such that the arm (11) is fixed in place at least in the direction transverse of the outer face. The edge of the body (9) is equal to the thickness of the tubings, the body (9) consists of two identical parts (10) having a square head face, each part heaving complementary connecting means (25) for joining a body part by a base face to the base face of the other body part in a direction transverse of the head face, whilst each side face has a recess (32) which is accessible only from the base face for the base part (35) of the arm (11) and which forms, together with a corresponding recess (32) in the other body part, the recess for receiving the base part (35) of an arm (11).</p> |
