FIELD: construction.
SUBSTANCE: gates include the drive system by which moving gate leaf (2) located in side guides moves between closed and opened position. Balancing unit includes rope member (8) and spring member (9) on one or each side of gates leaf, and device (12) for levelling rope tension related to rope member (8). Device (12) for levelling rope tension or each of such devices is protected against rope break. Rope member (8) or each of rope members consists of rope (10), which envelopes members of device (12) for levelling rope tension placed rigidly so that there are two rope branches passing at a distance from each other. Loose ends of rope (10) are connected and strengthened on gates leaf (2). In alternative version device (12) for levelling rope tension may be strengthened on the gates leaf (2). Then loose ends of rope (10) are rigidly fixed.
EFFECT: improving reliability.
10 cl, 4 dwg
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