JP-7856137-B1 - Detection device and detection method

JP7856137B1JP 7856137 B1JP7856137 B1JP 7856137B1JP-7856137-B1

Abstract

[Problem] To detect a malfunction where the safety shoe is incorrectly detected as having moved even though no object is in contact with it, while the door is not fully closed. [Solution] One embodiment of the present disclosure is a detection device for detecting a malfunction of a safety shoe provided at the closing end of a door in an elevator car (10) and movable in the opening and closing direction of the door. The detection device comprises a shoe switch (13) that detects that the safety shoe has moved a predetermined distance from its initial state to a first state in the opening direction of the door; a detection unit (14) that detects an object in the first area in which the door is movable; and a detection unit (24) that detects the malfunction based on the detection result from the shoe switch (13) and the detection result from the detection unit (14). [Selection Diagram] Figure 1

Inventors

三重野剛

Assignees

フジテック株式会社

Dates

Publication Date: 20260511
Application Date: 20241224

Claims (5)

A detection device for detecting a malfunction of a safety shoe, which is provided at the closing end of a door in an elevator car and is movable in the opening and closing direction of the door, A shoe switch that detects that the safety shoe has moved a predetermined distance from its initial state to a first state in the direction of opening the door, A detection unit that detects an object in a first region where the door is movable, The system includes a detection unit that detects the fault based on the detection result from the shoe switch and the detection result from the detection unit , The detection unit is If the detection unit does not detect an object in the first area within a first predetermined time from the time the shoe switch detects that the safety shoe has changed to the first state, the fault is detected, or A detection device for detecting a malfunction when the shoe switch detects that the safety shoe is in the first state at a time after a second predetermined time has elapsed from the point in time when the detection unit stops detecting an object in the first region .
If the shoe switch detects an object, and the detection unit has detected an object, or If, within a third predetermined period from the time when the detection unit stops detecting an object in the first region, the shoe switch detects that the safety shoe is in the first state, The detection device according to claim 1, wherein the detection unit determines that there is no malfunction.
The detection device according to claim 1, wherein the detection unit is a door sensor that detects an object in the first region using light.
The detection device according to claim 1, wherein the detection unit detects an object in the first region by analyzing an image or video captured in the first region.
A detection method for detecting a malfunction of a safety shoe provided at the closing end of a door in an elevator car, which is movable in the opening and closing direction of the door, A first detection step that detects whether the safety shoe has moved a predetermined distance from its initial state to a first state in the direction of opening the door, A second detection step involves detecting an object in a first region where the door is movable, The process includes a detection step that detects the fault based on the detection result obtained in the first detection step and the detection result obtained in the second detection step, In the detection step, If, within a first predetermined time from the time the shoe switch detects that the safety shoe has changed to the first state, no object is detected in the first area during the second detection step, then the fault is detected, or A detection method for detecting a malfunction when the shoe switch detects that the safety shoe is in the first state at a time after a second predetermined time has elapsed from the point in the second detection step when an object is no longer detected in the first region .

Description

This invention relates to a detection device for detecting a safety shoe malfunction, and the like. Some elevators are equipped with door safety shoes as a safety device. In such elevators, a shoe switch detects when the safety shoe is pressed against and moved by a passenger's body or other object, and the doors open automatically. This prevents people from getting caught in the doors and getting injured, or objects getting stuck and causing elevator malfunction. Patent Document 1 describes a device for determining whether a malfunction has occurred in which the safety shoe is incorrectly detected as having moved, even though no object is in contact with the safety shoe, while the door is fully closed. International Public Gazette 2017/199426 This is a block diagram showing the main components of an elevator system according to Embodiment 1 of the present invention.This is a front view of the elevator car in the elevator system described above.This is a view of the inside of the elevator car shown above, seen from above.This flowchart shows an example of a detection method for detecting a malfunction of the safety shoe in the elevator system described above.This flowchart shows another example of a detection method for detecting a malfunction of the safety shoe in the elevator system described above.Figure 5 is an illustrative diagram of the detection pattern of the detection unit and shoe switch in the detection method. The following describes in detail one embodiment of the present invention. Figure 1 is a block diagram showing the main components of the elevator system 100 (elevator) in this embodiment. As shown in Figure 1, the elevator system 100 comprises an elevator car 10 and an elevator control unit 20. The elevator car 10 is configured to carry people and cargo and move up and down within the elevator shaft. Figure 2 is a front view of the elevator car 10. Figure 3 is a view of the interior of the elevator car 10 from above. As shown in Figures 2 and 3, the elevator car 10 includes a pair of doors 11, a safety shoe 12, a shoe switch 13, and a detection unit 14. The door 11 is movable horizontally. In the elevator system 100 of this embodiment, the door 11 is a double-leaf type door; however, in one aspect of the elevator system of this disclosure, the door 11 may be a single-leaf type door. As shown in Figure 3, each pair of doors 11 consists of two doors: a landing door 11A on the landing side and a car door 11B on the elevator car side. A motor (not shown) is attached to the car door 11B, and the landing door 11A is pulled by the car door 11B, causing both the landing door 11A and the car door 11B to open and close simultaneously. The safety shoe 12 is provided at the closing end of each of the pair of doors 11. More specifically, the safety shoe 12 is provided at the closing end of the car door 11B of the door 11. The safety shoe 12 is a bar with a height approximately equal to the height of the door 11. The safety shoe 12 is movable in the opening and closing direction (horizontal direction) of the door 11. When the safety shoe 12 comes into contact with an object such as a passenger's body or another object while the door 11 is moving in the closing direction, it is pressed in the opening direction of the door 11, and is configured to move from its initial state in the opening direction of the door 11. When the safety shoe 12 is pressed by an object and moves relative to the door 11 in the opening direction, it is pulled up vertically, and when the pressing force from the object is removed, it returns to its initial state by its own weight. The shoe switch 13 is a switch for detecting that the safety shoe 12 has moved a predetermined distance from its initial state relative to the door 11, reaching a first state. The shoe switch 13 is located inside the car door 11B of the door 11. The shoe switch 13 may be, for example, a mechanical switch. In this embodiment, the shoe switch 13 is connected to the safety shoe 12 by a link-cam mechanism (not shown). When the safety shoe 12 is pushed in by the predetermined distance from its initial state, the link-cam mechanism switches from OFF to ON. This allows the shoe switch 13 to detect that the safety shoe 12 has reached the first state. In other words, the shoe switch 13 detects that the safety shoe 12 is in the first state. The shoe switch 13 outputs the detection result (hereinafter also referred to as the first detection result) to the elevator control unit 20. The detection unit 14 detects objects in a first region, which is the area in the elevator car 10 where the door 11 is movable. The first region is the area between a pair of doors 11. As an example, the first region in Figure 3 is shown as region A. The detection unit 14 is a door sensor that detects objects in the first region using light. The detection unit 14 may be, for example, a single-axis or multi-axis infrared sensor. In this embodiment, the detection unit 14 is a multi-axis infr