| 摘要 |
The invention concerns a stand borne by a frame (1) and divided into three groups: one central group (6) of bleachers constituting the hinge element between the front group (9) and the rear group (10). The central group (6) is articulated about a horizontal longitudinal pin (11) and is mobile by the effect of an actuator (25). The front group (9) is articulated about a pin (12) at the central group (6) lower end and the rear group (10) is articulated about a pin (15) at the rear end of an arm (20) integral with the central group (6) rear end. The groups are collapsed in the shape of a Z. Each of the group comprises a matching support, either a support integral with the trailer frame (1), or, in the case of the front group (9) with legs (13) provided with rollers (14) forming a support directly on the ground. The efforts related to the unfolding or collapsing movements are compensated and balanced by the movement of the roof (31), which roof (31) is linked by means of a connecting rod (36) to the pivot pin (15) interposed between the central group (6) and the rear group (10). |
