Elevator control system with elevator hoistway operation monitoring system and method

• US 5,476,157 A
• Filed: 06/03/1994
• Issued: 12/19/1995
• Est. Priority Date: 06/03/1994
• Status: Expired due to Fees

• Current Assignee: Sam S. Todaro
• Original Assignee: Sam S. Todaro
• Inventors: Todaro, Sam S.
• Primary Examiner(s): Wong, Peter S.
• Assistant Examiner(s): NAPPI, ROBERT E
• Application Number:
  US08/254,045
• Time in Patent Office: 564 Days
• Field of Search: 187/390, 187/391, 187/393, 187/317, 187/316, 187/249, 187/280
• US Class Current: 187/280
• CPC Class Codes: B66B 13/24 Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers

Abstract

An elevator control system (40) for automatically controlling the operation of an elevator car (22A) having a car door (24A) in which the elevator moves between different floor levels of an elevator shaft (30A) in which each floor level has associated hoistway doors (26A, 26C) for providing access to the elevator car (22A) in the shaft (30A) and an elevator hoistway operation monitoring system (34) with individual floor monitoring switches (32) for determining the floor level location of the elevator car (22A), individual hoistway door monitoring sensors (38) for sensing the opening of a hoistway door (26A) relays (56, 58, 52) and contact (50) coupled with an elevator safety circuit (42) for automatically preventing the elevator car (22A) from moving if a hoistway door (26A) is opened at a floor level other than the floor level at which the elevator car (22A) is located and for prohibiting the car (22A) from moving in response to the closing of the opened hoistway door (26A).

Claims

1. In an elevator control system for automatically controlling the operation of an elevator car having a car door in which said elevator car moves between different ones of a plurality of floor levels through an elevator shaft and in which said floor levels each have a hoistway door providing access to the elevator car in the shaft the improvement being an elevator hoistway operation monitoring system comprising:

means for sensing an opening of at least one of the hoistway doors at one of a plurality of floor levels and sensing a location of the elevator car at one of a plurality of floor levels;

means for automatically preventing the elevator car from moving if the at least one hoistway door is opened at a floor level other than the floor level at which the elevator car is located; and

means for prohibiting the elevator car from moving upon a subsequent closing of the at least one hoistway door at the floor level other than the floor level at which the elevator car is located an which the prohibiting means is directly actuated with positioning the at least one hoistway door in an opened position at a floor level other than the floor level at which the elevator car is located.

2. The elevator control system of claim 1 in which the automatic preventing movement means includes means for preventing movement of at least one other elevator car positioned laterally adjacent to the elevator car whereby the other elevator car is in a bank of elevator cars in which the elevator car is located in response to the sensing means sensing the opening of said at least one of the hoistway doors at a floor level other than the floor level at which the elevator car is located.

3. The elevator control system of claim 2 in which the automatically preventing movement means includes means for preventing movement of all elevator cars in said bank.

4. The elevator control system of claim 3 in which the prohibiting means prevents movement of all elevator cars in said bank upon the subsequent closing of the hoistway door at a floor level other than the floor level at which the elevator car is located.

5. The elevator control system of claim 2 in which the prohibiting means prevents the movement of said at least one other elevator car in response to the closing of the hoistway door at the floor level other than the floor level in which the elevator car is located.

6. The elevator control system of claim 2 in which said sensing means includes means for sensing opening of another hoistway door associated with said at least one other elevator car in said bank, and

means for preventing movement of the elevator car in response to the sensing of the opening of the other hoistway door in which the other hoistway door is located at a different level than said at least one other elevator car is located.

7. The elevator control system of claim 6 in which the prohibiting means prevents movement of said at least one other elevator car upon a subsequent closing of the other hoistway door located at a different level than said at least one other elevator car is located.

8. The elevator control system of claim 1 including means for deactivating the prohibiting means to resume movement of the elevator car through the elevator shaft.

9. The elevator control system of claim 1 in which said automatically preventing means is coupled with an elevator safety circuit of the elevator control system.

10. The elevator control system of claim 1 including means for activating one of:

(a) an audible alarm coupled with the automatically preventing means, (b) a visible light alarm coupled with the automatically preventing means, or (c) both (a) and (b).

11. In an elevator control system for automatically controlling the operation of an elevator car having a car door in which said elevator car moves between different ones of a plurality of floor levels in which an associated hoistway door is located on each of said plurality of floor levels to provide access to the elevator car at each floor and in which at least one other elevator car is located in an elevator bank with said elevator and in which the at least one other elevator car is spaced laterally from the elevator car in the elevator bank and in which said at least one other elevator car in the bank moves between different ones of another plurality of floor levels in which an associated another elevator hoistway door is located on each of said other plurality of floor levels to provide access to the at least one other elevator car, the improvement being an elevator hoistway operation monitoring system comprising:

means for determining the floor level of the elevator car in the bank;

means for sensing an opening of at least one hoistway door associated with the elevator car at a floor level other than the floor level at which the elevator car is located; and

means responsive to said sensing means for automatically preventing said at least one other elevator car in the bank from moving if said at least one hoistway door associated with the elevator car is opened at a floor level other than the floor level at which the elevator car is located.

12. The elevator control system of claim 11 including means for preventing movement of the elevator car in response to the sensing movement means.

13. The elevator control system of claim 12 including means for prohibiting said elevator car from moving upon a subsequent closing of said at least one associated hoistway door at the floor level other than the floor level at which the elevator car is located.

14. The elevator control system of claim 13 including means for deactivating the prohibiting means to resume movement of said elevator car.

15. The elevator control system of claim 12 including means for prohibiting movement of the at least one other elevator car upon subsequent closing of the hoistway door at the floor level other than the floor level at which the elevator car is located.

16. The elevator control system of claim 15 including means for deactivating the prohibiting means to resume movement of said at least one other elevator car.

17. The elevator control system of claim 11 including

means for sensing movement of opening of at least one other hoistway door associated with the at least one other elevator car;

means for determining the floor level of the at least one other elevator car, and

means for automatically preventing movement of the at least one other elevator car in response to opening of the at least one other hoistway door associated with the said at least one other elevator car at the floor level other than the floor level at which the at least one other elevator car is located.

18. The elevator control system of claim 17 including means for prohibiting movement of all elevator cars in said bank upon subsequent closing of said at least one other hoistway door.

19. The elevator control system of claim 18 including means for deactivating the prohibiting means to resume movement of all of the elevator cars in said bank.

20. The elevator control system of claim 11 in which said automatically preventing means is coupled with an elevator safety circuit of the elevator control system.

21. The elevator control system of claim 11 including means for activating one of:

(a) an audible alarm coupled with the automatically preventing means, (b) a visible light coupled with the automatically preventing means, or (c) both (a) and (b).