Head curtains for dock shelters or dock seals

B - Operations – Transporting – 65 – G

Patent

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Details

B65G 69/00 (2006.01)

Patent

CA 2726218

Head curtains for dock.shelters or dock seals are disclosed. An example head curtain assembly for a vehicle loading dock includes a retractable curtain (22) stiffened by a resiliently compressible foam panel (34) that is more flexible about a horizontal axis than about a vertical axis. The difference in directional flexibility can be created by sewing the foam panel (34) to a pliable cover (38) using a series of parallel horizontal thread lines. The thread lines create in the foam a series of compressed indentations (36) that run horizontally across the curtain (22) so that the curtain (22) tends to bend more easily along those lines. The relative stiffness in the horizontal direction enables the curtain (22) to exert an appreciable sealing force against two lateral dock seal members, and the vertical flexibility makes the curtain (22) easy to retract to accommodate vehicles of various heights. Touch-and-hold (60, 62, 66, 68, 70, 74) fasteners make many of the individual components of the head curtain readily replaceable.

Linvention concerne des rideaux supérieurs pour abris de quai ou sas d'étanchéité. Dans un exemple, un ensemble rideau supérieur pour quai de chargement de véhicules comprend un rideau escamotable (22) renforcé par un panneau en mousse (34) à compression élastique qui est plus souple autour d'un axe horizontal qu'autour d'un axe vertical. La différence de souplesse directionnelle peut être créée par assemblage par couture du panneau en mousse (34) à une couverture pliable (38) au moyen d'une série de lignes de fil horizontaux parallèles. Les lignes de fil créent dans la mousse une série d'indentations comprimées (36) qui traversent horizontalement le rideau (22) de sorte que celui-ci (22) tende à fléchir plus facilement le long de ces lignes. La raideur relative dans le sens horizontal permet au rideau (22) d'exercer une force adhésive appréciable contre deux éléments de sas d'étanchéité latéraux; et la souplesse verticale facilite un escamotage vertical du rideau (22) qui adapte celui-ci (22) à des véhicules de différentes hauteurs. Des dispositifs de fixation par contact (60, 62, 66, 68, 70, 74) permettent de remplacer facilement nombre des éléments individuels du rideau supérieur.

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