| 摘要 |
<p>The barrier (10) includes two flaps (24, 26) and two aligned, motor- (14, 22) driven shafts (16). One flap is held on each shaft. By driving the corresponding shaft, one flap is swung independently of the other. The shafts are separated by a bearing (18). Each flap is held on one shaft by fixed supports (36, 38; 42, 44) and on the other by a free bearing (40, 46). Direct current motors are used, each with a servo-controller. The shafts are hollow. The partitions (32, 34) are fixed to the bearing (18) and/or free bearing(s).</p> |
