Revolving door system

• US 6,493,991 B1
• Filed: 10/12/2000
• Issued: 12/17/2002
• Est. Priority Date: 11/02/1999
• Status: Expired due to Fees

• Current Assignee: Nabco Ltd. (Nabtesco Corporation)
• Original Assignee: Nabco Ltd. (Nabtesco Corporation)
• Inventors: Yokotachi, Hiroyuki, Hamada, Yoshinori
• Primary Examiner(s): Strimbu, Gregory J.
• Application Number:
  US09/689,559
• Time in Patent Office: 796 Days
• Field of Search: 49/42, 49/43, 109/2, 109/3, 109/5, 109/6, 109/7, 109/8, 109/9
• US Class Current: 49/42
• CPC Class Codes: E05F 15/608 for revolving wings
• CPC Class Codes: E05Y 2900/132 Doors
• CPC Class Codes: E06B 3/90 Revolving doors; Cages or housings therefor turnstiles E06B11/08

Abstract

A revolving door system includes outer walls (2) disposed in parallel with a doorway in a building. A hollow center core (3) having a racetrack-shaped cross-section is disposed between the outer walls, whereby passageways are defined by the lower surface (4a) of a ceiling (4), the floor, the center core and the outer walls. Upper and lower rails (10) and (11) are secured within the center core, and with which plural sets of upper and lower suspension devices (13) and (14) are movable engaged. A plurality of doors (12) are supported by the upper and lower suspension devices. A pulling bar (56) is linked to the upper suspension device for each door. The pulling bars are connected to a driving chain (75) driven to move by a door driving arrangement. A carrier bar (15) is connected to each upper suspension device, for rotatably supporting the upper portion of each door at a location near the center core. The lower portion of each door is rotatably supported by one of the lower suspension devices. An electromagnetic locking arrangement (51) detachably holds the upper portion of each door with respect to the carrier bar at a location remote from the center core.

Claims

1. A revolving door system for installation in a doorway defined by an opening in a wall of a building, said revolving door system comprising:

a pair of outer walls of substantially equal length and height, each outer wall being attachable to a side of the doorway in a position which is substantially perpendicular to said building wall;

a hollow center core disposed between said outer walls, said center core comprising a pair of side walls positioned in substantially parallel spaced relationship to said outer walls, each side wall having a length substantially equal to the length of each of said outer wall, said center core further comprising two curved end portions, each curved end portion connecting respective adjacent ends of said side walls, said side walls and end portions forming an outer surface of said hollow center core;

a ceiling member extending above said center core and said outer walls, said ceiling member, said center core and said outer walls defining two passageways for the doorway, each on a respective side of said center core;

upper and lower rails disposed on said center core, said rails extending horizontally around and parallel with the outer surface of said center core;

a plurality of doors, each door having an upper portion and a lower portion;

each door including upper and lower suspension devices, attached to said upper and lower portions respectively of said door, said upper and lower suspension devices being movably engaged with said upper and lower rails, respectively, so as lo enable movement along said upper and lower rails, thereby enabling movement of each of said doors along said passageways;

a door driving chain coupled to said upper suspension devices through pulling bars and moving along a predetermined path;

a rotation driver coupled to said door driving chain for driving said chain along said predetermined path; and

each door including a door supporting structure, each of said door supporting structures comprising a carrier bar coupled to a respective one of said upper suspension devices, each of said carrier bars extending in parallel with a plane defined by said ceiling member and having a length substantially equal to a width of each door;

each of said carrier bars being attached to the upper portion of a respective one of said doors and rotatably supporting said door at an end portion of said door proximate said center core and detachably holding an end portion of said door distal from said center core; and

the lower portion of each of said doors being rotatably supported by a respective one of said lower suspension devices which is attached to said end portion of said door proximate said center core.

2. The revolving door system according to claim 1 wherein each of said carrier bars electromagnetically detachably holds a respective one of said end portions of said doors distal to said center core.

3. A revolving door system for installation in a doorway defined by an opening in a wall of a building, said revolving door system comprising:

a pair of outer walls of substantially equal length and height, each outer wall being attachable to a side of the doorway in a position which is substantially perpendicular to said building wall;

a hollow center core disposed between said outer walls, said center core comprising a pair of side walls positioned in substantially parallel spaced relationship to said outer walls, each side wall having a length substantially equal to the length of each of said outer walls, said center core further comprising two curved end portions, each curved end portion connecting respective adjacent ends of said side walls, said side walls and end portions forming an outer surface of said hollow center core;

a ceiling member extending above said center core and said outer walls, said ceiling member, said center core and said outer walls defining two passageways for the doorway, each on a respective side of said center core;

upper and lower rails disposed on said center core, said rails extending horizontally around and parallel with the outer surface of said center core;

a plurality of doors, each door having an upper portion and a lower portion;

each door including, upper and lower suspension devices attached to said upper and lower portions respectively of said door, said upper and lower suspension devices being movably engaged with said upper and lower rails, respectively, so as to enable movement along said upper and lower rails, thereby enabling movement of each of said doors along said passageways;

a door driving chain coupled to said upper suspension devices through pulling bars and moving along a predetermined path;

a rotation driver coupled to said door driving chain for driving said chain along said predetermined path; and

each door including a door supporting structure, each of said door supporting structures comprising a carrier bar coupled to a respective of said upper suspension devices, each of said carrier bars extending in parallel with a plane defined by said ceiling member and having a length substantially equal to a width of each door, each of said door supporting structures further comprising a vertical support secured to an end portion of said carrier bar, proximate said center core each vertical support extending in parallel with the outer surface of said center core and having a lower end portion thereof connected to a respective one if said lower suspension devices;

each of said carrier bars being attached to the upper portion of a respective one of said doors and rotatably supporting said door at an end portion of said door proximate said center core and detachably holding an end portion of said door distal from said center core; and

the lower portion of each of said doors being rotatably supported by a respective one of said lower suspension devices which is attached to said end portion of said door proximate said center core.

4. The revolving door system according to claim 3 wherein each of said carrier bars electromagnetically detachably holds a respective one of said end portions of said doors distal to said center core.

5. A revolving door system for installation in a doorway defined by an opening in a wall of a building, said revolving door system comprising:

a pair of outer walls of the substantially equal length and height, each outer wall being attachable to a side of doorway in a position which is substantially perpendicular to said building wall;

a hollow center core disposed between said outer walls, said center core comprising a pair of side walls positioned in substantially parallel spaced relationship to said outer walls each side wall having a length substantially equal to the length of each of said outer walls, said center core further comprising two curved end portions, each curved end portion connecting respective adjacent ends of said side walls, said side walls and end portions forming an outer surface of said hollow center core;

a ceiling member extending above said center core and said outer walls, said ceiling member, said-floor, said center core and said outer walls defining two passageways for the doorway, each on a respective side of said center core;

upper and lower rails disposed on said center core, said rails extending horizontally around and parallel with the outer surface of said center core;

a plurality of doors, each door having an upper portion and a lower portion;

each door including upper and lower suspension devices, attached to said upper and lower portions respectively of said door, said upper and lower suspension devices being movably engaged with said upper and lower rails, respectively, so as to enable movement along said upper and lower rails, thereby enabling movement of each of said doors along said passageways;

a door driving chain coupled to said upper suspension devices through pulling bars and moving along a predetermined path;

a rotation driver coupled to said door driving chain for driving said chain along said predetermined path; and

each door including a door supporting structure, each of said door supporting structures comprising a carrier bar coupled to a respective one of said upper suspension devices, each of said carrier bars extending in parallel with a plane defined by said ceiling member and having a length substantially equal to a width of each door and a width substantially equal to a thickness of each door;

each of said carrier bars being hollow and housing therein a bearing for rotatably supporting a respective one of the doors, an arrangement for magnetically detachably holding the door, and a sensor for sensing an object in a moving path of the door.

6. A revolving door system for installation in a doorway defined by an opening in a wall of a building, said revolving door system comprising,

a pair of outer walls of substantially equal length and height, each outer wall being attachable to a side of the doorway in a position which is substantially perpendicular to said building wall;

a hollow center core disposed between said outer walls, said center core comprising a pair of side walls positioned in substantially parallel spaced relationship to said outer walls, each side wall having a length substantially equal to the length of each of said outer walls, said center core further comprising two curved end portions, each curved end portion connecting respective adjacent ends of said side walls, said side walls and end portions forming an outer surface of said hollow center core;

a ceiling member extending above said center core and said outer walls, said ceiling member, said center core and said outer walls defining two passageways for the doorway, each on a respective side of said center core;

upper and lower rails disposed on said center core, said rails extending horizontally around and parallel with the outer surface of said center core;

a plurality of doors, each door having an upper portion and a lower portion;

each door including upper and lower suspension devices, attached to said upper and lower portions respectively of said door, said upper and lower suspension devices being movably engaged with said upper and lower rails, respectively, so as to enable movement along said upper and lower rails, thereby enabling movement of each of said doors along said passageways;

a door driving chain coupled to said upper suspension devices through pulling bars and moving along a predetermined path.

a rotation driver coupled to said door driving chain for driving said chain along said predetermined path; and

each door including a door supporting structure, each of said door supporting structures comprising a carrier bar coupled to a respective one of said upper suspension devices, each of said carrier bars extending in parallel with a plane defined by said ceiling member and having a length substantially equal to a width of each door;

each of said carrier bars being hollow and housing therein a bearing which rotatably supports a pivot secured to the upper portion of a respective one of the doors at an end portion of said door proximate said center core;

each of said doors including a spring biased automatic door closing arrangement for automatically pivoting said door about said pivot into a closed position, each of said automatic door closing arrangements being disposed within said ceiling member and extending in parallel with an associated one of said pulling bars, each of said pulling bars having a linkings member secured to an associated one of the carrier bars and to an associated one of the upper suspension devices.

7. A revolving door system for installation in a doorway defined by an opening in a wall of a building, said revolving door system comprising:

a pair of outer walls of substantially equal length and height, each outer wall being attachable to a side of the doorway in a position which is substantially perpendicular to said building wall;

a hollow center core disposed between said outer walls, said center core comprising a pair of side walls positioned in substantially parallel spaced relationship to said outer walls, each side wall having a length substantially equal to the length of each of said outer walls, said center core further comprising two curved end portions, each carved end portion connecting respective adjacent ends of said side walls, said side walls and end portions forming an outer surface of said hollow center core;

a ceiling member extending above said center core and said outer walls, said ceiling member, said center core and said outer walls defining two passageways for the doorway, each on a respective side of said center core;

upper and lower rails disposed on said center core, said rails extending horizontally around and parallel with the outer surface of said center core;

a plurality of doors, each door having an upper portion and a lower portion;

each door including upper and lower suspension devices, attached to said upper and lower portions respectively of said upper and lower suspension devices being movably engaged with said upper and lower rails, respectively, so as to enable movement along said upper and lower rails, thereby enabling movement of each of said doors along said passageways;

a door driving chain coupled to said upper suspension devices through pulling bars and moving along a predetermined path;

a rotation driver coupled to said door driving chain for driving said chain along said predetermined path; and

each door including a door supporting structure which pivotally supports said door at an end portion of said door proximate said center core and is supported by a respective pair of said upper and lower suspension devices, each of said door supporting structures further including an error absorbing device disposed between one of said respective pair of said upper and lower suspension devices and said door supporting structure for absorbing variations in distance between said one of said respective pair of said upper and lower suspension devices and said door supporting structure.

8. A revolving door system for installation in a doorway defined by an opening in a wall of a building, said revolving door system comprising:

a pair of outer walls of substantially equal length and height each outer wall being attachable to a side of the doorway and in a position which is substantially perpendicular to said building wall;

a hollow center core disposed between said outer walls, said center core comprising a pair of side walls positioned in substantially parallel spaced relationship to said outer walls, each side wall having a length substantially equal to the length of each of said outer walls, said center core further comprising two curved end portions, each curved end portion connecting respective adjacent ends of said side walls, said side walls and end portions forming an outer surface of said hollow center core;

a ceiling member extending above said center core and said outer walls, said ceiling member, said center core and said outer walls defining two passageways for the doorway, each on a respective side of said center core;

upper and lower rails disposed on said center core, said rails extending horizontally around and parallel with the outer surface of said center core;

a plurality of doors, each door having an upper portion and a lower portion;

each door including upper and lower suspension devices, attached to said upper and lower portions respectively of said door, said upper and lower suspension devices being movably engaged with said upper and lower rails, respectively, so as to enable movement along said upper and lower rails, thereby enabling movement of each of said doors along said passageways;

a door driving chain coupled to said upper suspension devices through pulling bars and moving along a predetermined path;

a rotation driver coupled to said door driving chain for driving said chain along said predetermined path; and

each door including a door supporting structure, each of said door supporting structures comprising a carrier bar coupled to a respective one of said upper suspension devices, each of said carrier bars extending in parallel with a plane defined by said ceiling member and having a length substantially equal to a width of each door;

each of said carrier bars being attached to the upper portion of a respective one of said doors and rotatably supporting said door at an end portion of said door proximate said center core and detachably holding an end portion of said door distal from said center core;

the lower portion of each of said doors being rotatably supported by a respective one of said lower suspension devices which is attached to said end portion of said door proximate said center core;

each of said upper and lower suspension devices having two sets of four wheels, each set disposed within a rigid frame and rotatably supported by an associated wheel support, said four wheels in each set rotatably engaging with an associated one of said rails so that a respective one of said suspension devices can move along said associated rail, one set of said two sets of four wheels of each of said upper and lower suspension devices being spaced from the other set of said two sets of four wheels of a respective one of said upper and lower suspension devices along said associated rail.