| 摘要 |
The anti-extraction safety system incorporates, on each side, one side component which does not rotate with the corresponding roller, that incorporates at least one inclined flap articulated to pivot between a lowered position wherein its lower part extends under the rail head, and a raised position in which its lower part is laterally distanced from the rail. The pivot axis of the flap is inclined upwards and is located in the rear part of the flap, above the lower part in the lowered position. This flap is subjected to a downward return force which maintains it in the lowered position, but which allows it to pivot to the raised position when an upward force greater than the return force, is applied on its lower part. |
| 主权项 |
1. A guidance head of a guidance system for a road vehicle with at least one guide roller designed to roll on the upper surface of the head of a guide rail on the ground, with sides, each being connected by a recess in the body of the rail;
with at least one guide being mounted on a shaft on a mounting of the guidance system; with the guidance system being joined to the vehicle by a connection that is distortable under the effect of movement of the guidance head when it is in engagement with the guide rail, and constraining the guidance head to remain in contact with the head of the guide rail; with this guidance head being equipped with an anti-extraction safety system, and being characterized in that: the anti-extraction safety system incorporates, on each side, a side component that does not rotate with the at least one guide roller, of which the base is designed to be located, in use, under the corresponding recess in the guide rail, to counteract a force that would cause extraction of the guidance system; at least one of its side components incorporates at least one flap inclined downwards towards the guide rail, with the said at least one flap being pivotally articulated about an inclined pivot axis such that the at least one flap pivots between: a lowered safety position in which the lower part of the at least one flap extends, in use, under the corresponding recess of the guide rail, so as to oppose extraction of the guidance system; and a raised re-engagement position in which the lower part of the at least one flap is, in use, laterally distanced from the corresponding side of the guide rail, allowing its vertical passage relative to the guide rail and, therefore, the disengagement or re-engagement of the guidance system from or onto the guide rail; the at least one flap is subjected to a downward force which keeps it in the lowered safety position, but which allows the pivoting of the at least one flap into the raised re-engagement position when an upwardly-directed force exceeding the downward force is applied to the lower part of the at least one flap or when this pivoting is commanded by an actuator. |
