Isolating device for an opening traversed by conveyor cars

Claim 2

An isolating apparatus for an opening in a wall traversed by a conveyor track, comprising: a door adapted to close said opening; hinge means for swingably mounting said door adjacent said opening for displacement of said door from an open position wherein said door extends generally in the direction of said track into a closed position wherein said door closes said opening and lies perpendicular to said direction; a movable section of said track adjacent said opening between fixed sections of said track, said movable section being shiftable in said direction to clear a path for said door; and coupling means connecting said door to said movable section for displacing same in said direction as said door is displaced between said positions, said door being swingably mounted above said track.

Claim 3

An apparatus defined in claim 1, further comprising drive means operatively connected to said door for opening and closing same.

Claim 4

An apparatus defined in claim 1, further comprising a door closer connected with said door and prestressed to shift said door into a closed position, and retaining means for releasably retaining said door in its open position against the prestress of said door closer.

Claim 5

An isolating apparatus for an opening in a wall traversed by a conveyor track, comprising: a door adapted to close said opening; hinge means for swingably mounting said door adjacent said opening for displacement of said door from an open position wherein said door extends generally in the direction of said track into a closed position wherein said door closes said opening and lies perpendicular to said direction; a movable section of said track adjacent said opening between fixed sections of said track, said movable section being shiftable in said direction to clear a path for said door; and coupling means connecting said door to said movable section for displacing same in said direction as said door is displaced between said positions, said movable section being provided with means enabling same to ride up over a stationary track section, said stationary track section being provided with a ramp upon which said movable track section rides.

Claim 6

An isolating apparatus for an opening in a wall traversed by a conveyor track, comprising: a door adapted to close said opening; hinge means for swingably mounting said door adjacent said opening for displacement of said door from an open position wherein said door extends generally in the direction of said track into a closed position wherein said door closes said opening and lies perpendicular to said direction; a movable section of said track adjacent said opening between fixed sections of said track, said movable section being shiftable in said direction to clear a path for said door; and coupling means connecting said door to said movable section for displacing same in said direction as said door is displaced between said positions, said movable section being provided with means enabling same to ride up over a stationary track section, said stationary track section being provided with a ramp upon which said movable track section rides.

Claim 7

An isolating apparatus for an opening in a wall traversed by a conveyor track, comprising: a door adapted to close said opening; hinge means for swingably mounting said door adjacent said opening for displacement of said door from an open position wherein said door extends generally in the direction of said track into a closed position wherein said door closes said opening and lies perpendicular to said direction; a movable section of said track adjacent said opening between fixed sections of said track, said movable section being shiftable in said direction to clear a path for said door; and coupling means connecting said door to said movable section for displacing same in said direction as said door is displaced between said positions, said movable track section being formed as a plurality of articulated track segments and said movable track section is folded within said opening as said door is swung into its closed position.

Claim 8

An isolating apparatus for an opening in a wall traversed by a conveyor track, comprising: a door adapted to close said opening; hinge means for swingably mounting said door adjacent said opening for displacement of said door from an open position wherein said door extends generally in the direction of said track into a closed position wherein said door closes said opening and lies perpendicular to said direction; a movable section of said track adjacent said opening between fixed sections of said track, said movable section being shiftable in said direction to clear a path for said door; and coupling means connecting said door to said movable section for displacing same in said direction as said door is displaced between said positions, said movable track section being formed as a plurality of articulated track segments and said movable track section is folded within said opening as said door is swung into its closed position.

Claim 9

An apparatus defined in claim 5, further comprising a spring acting upon said segments for enabling the folding of said movable track section in said opening.

Claim 10

An apparatus defined in claim 6 wherein three such segments are provided and are folded in a zigzag configuration.

Claim 11

An apparatus defined in claim 5 wherein said coupling means is constructed and arranged to fold said movable track section.

Claim 12

An apparatus defined in claim 8 wherein said coupling means includes a cable connecting said movable track section and said door.

Claim 13

An apparatus defined in claim 8 wherein said coupling means includes bars on one of said segments and on said door and a link pivotally connected to said bars.

Claim 14

An apparatus defined in claim 8 wherein said coupling means includes a longitudinal guide on said door and means connected to one of said segments and riding in said guide.

Claim 15

An apparatus defined in claim 5, further comprising means between said segments for urging same into an unfolded operating position.

Claim 16

An apparatus defined in claim 12 wherein the last mentioned means includes a hinge drum between two such segments and a spiral spring on said hinge drum extending to a stationary track section.