Operable wall assembly with drive system

1. An operable wall assembly for use in a building having a floor, the operable wall assembly comprising:

first and second end supports transferring substantially the entire weight of supported portions of the operable wall assembly to the floor such that the operable wall assembly is substantially free standing;

a top support assembly supported at opposite ends by the first and second end supports, the top support assembly including a track, a space being bounded by the first and second end supports, top support assembly, and floor, the top support assembly includes

a top rail,

a bottom rail that includes the track and a runner extending along the track between the first and second end supports, and

a truss assembly interconnected between the top rail and the bottom rail;

a plurality of wall panels suspended from the top support assembly and movable along the track between a deployed condition in which the wall panels close the space and a stacked condition in which the wall panels do not close the space, the wall panels are suspended from the track by way of a plurality of carriers connected to the wall panels and adapted to move along the track;

a prime mover; and

a drive system supported by the first and second end supports and interconnected between prime mover and the wall panels to move the wall panels between the deployed condition and stacked condition under the influence of the prime mover, the drive system includes a flexible force transmitting member supported by the runner and extending from the first end support to the second end support and back to the first end support in a loop,

wherein the runner extends along first and second opposite sides of the track such that the flexible force transmitting member extends in a loop along the first and second sides of the track.

2. The operable wall assembly of claim 1 , wherein the flexible force transmitting member is interconnected between the prime mover and at least one of the wall panels.

3. The operable wall assembly of claim 1 , wherein the flexible force transmitting member includes a chain interconnected between the prime mover and at least one of the wall panels.

4. The operable wall assembly of claim 1 , wherein the runner supports moving portions of the flexible force transmitting member.

5. The operable wall assembly of claim 1 , wherein the runner that is integrally formed with the track in the top support assembly and supports moving portions of the flexible force transmitting member.

6. The operable wall assembly of claim 1 , wherein the runner is integrally formed with the track in the top support assembly and extends alongside the track between the first and second end supports and supporting moving portions of the flexible force transmitting member.

7. The operable wall assembly of claim 1 , wherein the flexible force transmitting member includes a chain.

8. The operable wall assembly of claim 7 , wherein the drive system includes a return sprocket proximate the second end support for turning the chainback toward the first end support.

9. The operable wall assembly of claim 8 , wherein:

the prime mover includes a motor supported by the first and second end supports, the motor having a motor shaft;

the drive system includes a transmission operating in response to rotation of the motor shaft and a drive sprocket rotated by the transmission and interconnected with the chain proximate the first end support.

10. The operable wall assembly of claim 9 , wherein the motor shaft extends horizontally and the drive sprocket rotates about a vertical axis.

11. The operable wall assembly of claim 9 , wherein:

the top support assembly includes first and second oppositely-facing sides; and

the motor and transmission are both mounted to the first side of the top support assembly.

12. The operable wall assembly of claim 1 , further comprising a control system for controlling operation of the prime mover, wherein:

the top support assembly includes first and second oppositely-facing sides; and the prime mover and control system are both mounted to the first side of the top support assembly.

13. The operable wall assembly of claim 1 , further comprising a control system for operating the prime mover, the control system include a limit switch to limit travel of the wall panels.

14. An operable wall assembly for use in a building having a floor, the operable wall assembly comprising:

first and second end supports transferring substantially the entire weight of the operable wall assembly to the floor such that the operable wall assembly is substantially free standing;

a top support assembly supported at opposite ends by the first and second end supports, the top support assembly including a track and a chain runner adjacent the track, a space being bounded by the first and second end supports, top support, and floor, a top rail, a bottom rail, and a truss assembly interconnected between the top rail and the bottom rail;

a plurality of wall panels suspended from the track of the top support assembly by way of a plurality of carriers connected to the wall panels and movable along the track between a deployed condition in which the wall panels close the space and a stacked condition in which the wall panels do not close the space;

a motor;

a drive sprocket rotated by the motor; and

a chain supported by the chain runner and interconnected between a least one of the wall panels and the drive sprocket to move the wall panels between the deployed condition and stacked condition under the influence of the motor and chain, the chain extending from the first end support to the second end support and back to the first end support in a loop,

wherein the bottom rail includes the track and the chain runner extending along the track between the first and second end supports, and

wherein the chain runner extends along first and second opposite sides of the track such that the chain extends in a loop along the first and second sides of the track.

15. The operable wall assembly of claim 14 , wherein the chain is interconnected between the motor and at least one of the wall panels.

16. The operable wall assembly of claim 14 , wherein the chain runner is formed integrally with the track.

17. The operable wall assembly of claim 14 , further comprising a transmission operably interconnecting the motor with the drive sprocket, wherein:

the motor includes a horizontal motor shaft; and the drive sprocket rotates about a vertical axis.

18. The operable wall assembly of claim 14 , further comprising a control system including a controller for controlling the motor and at least one limit switch providing a signal to the controller for stopping the motor when the wall panels have reached the deployed condition.

19. The operable wall assembly of claim 14 , further comprising:

a transmission operably interconnecting the motor with the drive sprocket; and a controller for the motor;

wherein the top support assembly includes first and second oppositely-facing sides; and wherein the motor, transmission, and controller are all mounted to the first side of the top support assembly.