JP2004224542A - Maintenance safety device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive and easily realizable maintenance safety device of an elevator capable of setting to a predetermined operation mode when a person in charge of maintenance rides on an elevator car. <P>SOLUTION: An elevator system is provided with a load weight detection part 12 detecting load weight of the elevator car 30 and a car door passing detection part 14 detecting passing of an inlet of an opened car door 38. An elevator controller 10 has a mode setting part 16 setting operation mode of the elevator based on detection signals of the load weight detection part 12 and the car door passing detection part 14. When the load weight detection part 12 detects increase of load weight and the car door passing detection part 14 does not detect its passing, the mode setting part 16 sets ordinary operation inhibit mode for inhibiting ordinary operation of the elevator. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a maintenance and safety device for an elevator, and more particularly to setting of an operation mode when a maintenance person gets on an elevator car.
[0002]
[Prior art]
FIG. 5 is a diagram showing the overall configuration of the elevator system. As shown in FIG. 5, the elevator system includes an elevator car 30 and a counterweight 32 suspended at both ends of a main rope 34, and the main rope 34 is a mesh wheel and a deflector wheel of a hoisting machine 36 that performs a lifting drive. Wrapped around. The elevator car 30 is provided with a car door 38, and the landings 40-1 to 40-n are provided with landing doors 42-1 to 42-n at positions facing the car door 38 of the elevator car 30 to be stopped. Can be The elevator system is provided with an elevator control device 44. The elevator control device 44 responds to a user's driving instruction input to a control panel provided in the landing 40-1 to 40-n or the elevator car 30. Thus, the elevator car 30 is controlled to move up and down and to open and close the door.
[0003]
In the elevator system configured as described above, a maintenance person regularly gets on the elevator car 30 and performs maintenance and inspection. FIG. 6 is a diagram showing a state of conventional maintenance and inspection.
[0004]
As shown in FIG. 6, during the maintenance and inspection work, the elevator car 30 is moved so that the ceiling surface 30a of the elevator car 30 and the floor of the landing, for example, the floor surface 40-2a of the second floor 40-2 are almost the same height. The maintenance staff is stopped, and the maintenance staff opens the landing door 42-2 on the second floor using a special jig (unlock) and rides on the elevator car 30. Thereafter, the maintenance staff operates the maintenance / inspection switch 46 provided in the elevator car 30 or on the car ceiling surface 30a to perform a maintenance / inspection mode in which the elevator can be operated from a normal operation mode such as a high-speed automatic operation or a manual operation or a low-speed operation. And perform maintenance.
[0005]
In addition, a boarding sensor 48 (for example, a weight detection sensor) for detecting the entry of a maintenance person is provided on the elevator car 30. When the boarding sensor 48 detects the entry of the maintenance person, the elevator automatically enters the maintenance and inspection mode. Switching devices have also been proposed. For example, such an apparatus is disclosed in, for example, JP-A-11-322214 (Patent Document 1) and JP-A-2000-351545 (Patent Document 2).
[0006]
[Patent Document 1]
JP-A-11-322214 [Patent Document 2]
JP 2000-351545 A
[Problems to be solved by the invention]
However, when the maintenance and inspection switch 46 is operated to set the maintenance and inspection mode in the maintenance and inspection, the maintenance staff may forget to operate the maintenance and inspection switch 46. When such a human error occurs, the elevator is operated as usual, and a situation occurs in which the maintenance staff cannot perform desired maintenance and inspection.
[0008]
Further, a device in which the boarding sensor 48 is provided on the elevator car 30 and automatically switches to the maintenance and inspection mode has a problem that the cost is high.
[0009]
Accordingly, an object of the present invention is to provide an inexpensive and easily realizable elevator maintenance and safety device that can be set to a predetermined operation mode when a maintenance person gets on an elevator car.
[0010]
[Means for Solving the Problems]
The maintenance and safety device for an elevator according to the present invention includes a load weight detecting means for detecting a load weight of the elevator car, a car door passage detecting means for detecting passage of an opened car door, and a load weight detecting means for detecting a load weight. And a mode setting means for setting a normal operation prohibition mode for prohibiting normal operation of the elevator when the car door passage detection means does not detect the passage.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention (hereinafter, referred to as embodiments) will be described with reference to the drawings. In this case, the same or corresponding members as in the related art are denoted by the same reference numerals, and description thereof will be omitted.
[0012]
FIG. 1 is a diagram showing the overall configuration of an elevator system to which an elevator maintenance and safety device 1 of the present embodiment is applied.
[0013]
As shown in FIG. 1, the elevator system includes an elevator car 30, a counterweight 32, a hoist 36 that drives the elevator car 30 up and down, and an elevator control device 10 that controls these elevator cars. The elevator control device 10 has a microcomputer, and controls the operation of the elevator by microcomputer control.
[0014]
In the present embodiment, in addition to the above-described elevator system, a load weight detection unit 12 that detects a load weight of the elevator car 30, a car door passage detection unit 14 that detects passage of an opened car door 38 through an entrance, , Is provided. In addition, the elevator control device 10 has a mode setting unit 16 that sets the operation mode of the elevator based on detection signals from the load weight detection unit 12 and the car door passage detection unit 14. As a result, the mode setting unit 16 makes a predetermined determination, determines that the maintenance person has got on the elevator car 30, and can set the normal operation prohibition mode in which the normal operation is prohibited. The details will be described below.
[0015]
In the present embodiment, the load weight detection unit includes, for example, the weighing device 12. The weighing device 12 is provided below the elevator car 30, detects the load weight of the elevator car 30, and outputs a detection signal. This detection signal is output to the elevator control device 10. It is also preferable that the weighing device 12 outputs a load weight increase signal when the load weight increases. The increase in the load weight is detected, for example, by comparing the load weight at the time when the elevator car 30 stops and the load weight detected during the stop period. When the threshold value is exceeded, a load weight increase signal of the load weight can be output.
[0016]
Conventionally, the elevator car 30 is provided with the weighing device 12 for use in detecting an excess of the loaded weight of the elevator car 30 or by outputting a detection signal of the weighing device 12 to the elevator control device 10 and winding a current corresponding to the load weight. It is supplied to the upper unit 36 to control the operation of the elevator. The weighing device 12 of the present embodiment can also be used as the weighing device 12 for detecting the excess of the loaded weight and controlling the operation.
[0017]
As shown in FIG. 1, the car door passage detection unit 14 includes, for example, a multi-beam door sensor 14 (product name, MBS). As shown in FIG. 1, the multi-beam door sensor 14 includes a light emitting unit 14a that emits infrared light and a light receiving unit 14b that receives the light, provided on both sides of the door frame of the car door 38. When a user of the elevator or a loaded luggage passes through the entrance 38a of the car door 38, the infrared light emitted from the light emitting unit 14a is blocked by the passage of the user or the like, and the passage of the user can be detected. Conventionally, such a multi-beam door sensor 14 is used to prevent a user or the like from being pinched by the closing operation of the car door 38, and in the present embodiment, the car door passage detection unit 14 is prevented from being pinched as described above. Can also be used as the multi-beam door sensor 14 for The detection signal of the multi-beam door sensor 14 is output to the elevator control device 10.
[0018]
FIG. 2 is a diagram illustrating another embodiment of the car door passage detection unit. As shown in FIG. 2, it can be constituted by an ultrasonic door sensor (USDS) 18 provided above the car door 38. The ultrasonic door sensor 18 detects passage of a user or the like by ultrasonic waves. In addition, the car door passage detection unit includes a photoelectric device or a human door sensor (trade name, a detection device using a thermocouple assembly element, a sensor attached to the top of the car door, and a radiant infrared ray of a user passing through the entrance. Energy detecting device).
[0019]
The elevator control device 10 of the present embodiment controls the operation of the elevator and realizes the function of the mode setting unit 16 as described above. That is, the mode setting unit 16 determines that the maintenance person has stepped on the elevator car 30 based on the detection signals from the weighing device 12 and the multi-beam door sensor 14, and prohibits the normal operation of the elevator. Set. Here, normal operation refers to normal operation of the elevator such as high-speed automatic operation.
[0020]
FIG. 3 is a diagram illustrating a state in which a maintenance person gets on the elevator car 30 during maintenance and inspection. As shown in FIG. 3, the floor surface 40-2a of the landing 40-2 on the second floor and the ceiling surface 30a of the elevator car 30 are flush with each other, and the maintenance staff removes the landing door 42-2 by a dedicated jig (unlock). And open the elevator car 30. In such a state of getting on the elevator car 30, the weighing device 12 detects an increase in the load weight, and the multi-beam door sensor 14 does not detect the passage through the entrance 38a of the car door 38. Therefore, in the present embodiment, the mode setting unit 16 determines that the maintenance person has stepped on the elevator car 30 when the weighing device 12 detects an increase in the load weight and the multi-beam door sensor 14 does not detect the passage. Then, set the normal operation prohibition mode. Thus, when the maintenance person gets on the elevator car 30, normal operation of the elevator can be prohibited.
[0021]
Next, the operation of the maintenance and safety device 1 for an elevator will be described. FIG. 4 is a flowchart showing the operation of the maintenance and safety device 1 for an elevator.
[0022]
The detection signals of the weighing device 12 and the multi-beam door sensor 14 are supplied to the elevator control device 10 (S10). The mode setting unit 16 determines whether the output of the weighing device 12 has increased, that is, whether the weighing device 12 has detected an increase in load weight (S12). When the weighing device 12 has detected an increase in the load weight (YES in S12), the mode setting unit 16 sets the multi-beam door sensor 14 to the car within a predetermined time (for example, within 10 seconds) before the increase in the load weight. It is determined whether passage of the entrance 38a of the door 38 has been detected (S14). When the multi-beam door sensor 14 does not detect the passage (NO in S14), the mode setting unit 16 sets the normal operation prohibition mode (S16). By the determinations in S12 and S14, it is determined that the elevator maintenance staff has got on the elevator car 30, and the normal operation prohibition mode is set, so that the normal operation of the elevator can be prohibited.
[0023]
If the answer is NO in S12 and the answer is YES in S14, it is determined that the vehicle gets in and out of the normal elevator car 30, and the normal operation prohibition mode is not set (S20).
[0024]
Subsequently, the release of the normal driving prohibition mode will be described.
[0025]
In the state of the normal operation prohibition mode, the mode setting unit 16 determines whether the maintenance and inspection switch 46 has been operated, for example, to enter the maintenance and inspection mode (S22). When the maintenance mode is set (YES in S22), the normal operation prohibition mode is released (S24). As a result, the maintenance staff can perform desired maintenance and inspection in the maintenance and inspection mode. If NO in S22, that is, the normal operation prohibition mode is not released until the maintenance inspection switch 46 is operated. Therefore, the normal operation of the elevator can be prohibited until the maintenance staff operates the maintenance inspection switch 46.
[0026]
【The invention's effect】
As described above, according to the present invention, it is possible to determine whether a maintenance person has entered the elevator car based on the detection signals of the load weight detection unit and the car door passage detection unit. Can be set to
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an overall configuration of an elevator system to which an elevator maintenance and safety device according to an embodiment is applied.
FIG. 2 is a diagram illustrating another embodiment of a car door passage detection unit.
FIG. 3 is a diagram showing a state in which a maintenance person gets on an elevator car.
FIG. 4 is a flowchart showing the operation of the maintenance and safety device of the elevator.
FIG. 5 is a diagram showing an overall configuration of an elevator system.
FIG. 6 is a diagram showing a state of a conventional maintenance inspection.
[Explanation of symbols]
1 Elevator maintenance safety device, 10 elevator control device, 12 load weight detection unit, 14 car door passage detection unit, 16 mode setting unit, 18 ultrasonic door sensor, 30 elevator car, 32 counterweight, 34 main rope, 36 winding , 38 car door, 38a entrance, 40 landing, 42 landing door, 44 elevator control unit, 46 maintenance switch, 48 boarding sensor.

Claims (1)

Load weight detection means for detecting the load weight of the elevator car,
Car door passage detection means for detecting passage of the entrance of the opened car door;
Mode setting means for setting a normal operation prohibition mode for prohibiting normal operation of the elevator, when the load weight detection means detects an increase in load weight, and when the car door passage detection means does not detect passage,
A maintenance safety device for an elevator, comprising:

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