| 摘要 |
<p>An outer plate (7) has an almost rectangular outer window (11) formed between a pair of link pin apertures and an inner plate (4) has an almost rectangular inner window (10) formed between a pair of bush apertures (5). The outer and inner windows are each rounded at its corners. The outer plate (7) and inner plate (4) are each composed of a circular arc portion (41, 71) at lengthwise both ends thereof and a side (42, 72) extending almost linearly and widthwise outwardly thereof. The sides (72) are set so as to extend inwardly relative to the end-tangential directions of the circular arc portions (71) of the outer plate (7).</p> |
