JP2013220895A - Operation control system for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a lower portion of a balance weight and the like from coming into contact with a maintenance person and the like in a pit, by automatically detecting the presence of the maintenance person and the like in the pit in the case of the presence of the maintenance person and the like in the pit to regulate an operation of a cage.SOLUTION: A person detection sensor (sensor such as a pyroelectric infrared sensor, a transmissive photoelectric sensor, a reflective photoelectric sensor or an ultrasonic sensor) 4 directly detects whether or not a maintenance person 18 is in a pit 16. When the maintenance person 18 is in the pit 16, the entry of a balance weight 4 into the pit 16 is prevented by regulating an operation of a cage 2 so that the cage 2 cannot go up to a top floor.

Description

  Embodiments described herein relate generally to an elevator operation control system that can ensure the safety of maintenance personnel who perform work in an elevator hoistway.

  Conventionally, as a technique related to ensuring the safety of maintenance personnel working in an elevator hoistway, there is one described in Patent Document 1.

  In the invention described in Patent Document 1, an illumination switch that indirectly detects whether or not there is a person in the pit of the elevator hoistway is installed. When a lighting switch is operated by a maintenance worker, a part of the response to each car call is prohibited so as not to move the car into the pit of the elevator hoistway where it is estimated that the maintenance worker is present.

JP 2006-44444 A

  By the way, in the maintenance work of an elevator, one maintenance person gets into the car and raises and lowers the car, while another maintenance person performs the maintenance work in the pit.

  In this case, when the car reaches the vicinity of the lowermost floor, there is a possibility that maintenance personnel in the pit may come into contact with the lower part of the car. For this reason, in the above-mentioned conventional example, a part of the response to each call is prohibited, and the car is restricted from entering the predetermined floor related to the place where the maintenance staff is detected, for example, the lowest floor. The safety of maintenance personnel in the pit is ensured.

  However, such a conventional elevator operation does not consider the position of the counterweight at all. For this reason, when the car reaches the top floor, the counterweight reaches the vicinity of the pit, and there is a possibility that the maintenance staff in the pit may come into contact with the lower part of the counterweight.

  In the embodiment of the present invention, when a person is present in the pit, the operation of the car is restricted so that not only the lower part of the car but also the lower part of the counterweight contacts the person in the pit. An object of the present invention is to provide an elevator operation control system that can be prevented.

  In order to achieve the above object, an embodiment of the present invention is a human detection sensor that detects whether or not a person is present in a pit of an elevator hoistway in which a car and a counterweight connected by a main rope move up and down. When no person is detected by the person detection sensor, the motor is controlled to respond to calls from the landing buttons, the destination floor buttons of the operation panel in the car, and the inspection switch. On the other hand, when a person is detected by the human detection sensor, a control unit is provided that controls the vertical movement of the car so that the counterweight does not enter the pit. It is characterized by. Here, in the embodiment of the present invention, the “pit” includes not only the bottom of the hoistway but also a work space that is a predetermined distance above the bottom of the hoistway.

1 is a schematic configuration diagram of a first embodiment of an elevator operation control system. FIG. The circuit diagram which shows the circuit example of the operation control system of the elevator shown in FIG. Explanatory drawing which shows an example of the attachment position of a person detection sensor.

<< First Embodiment >>
FIG. 1 is a schematic configuration diagram showing an elevator system to which an embodiment of an elevator operation control system is applied.

  In the elevator system 1 shown in this figure, a car 2 and a counterweight 4 connected to the car 2 and a main rope 3 are disposed in an elevator hoistway 5 so as to be freely raised and lowered. On the upper part of the elevator hoistway 5, a hoisting machine 6 that moves the main rope 3 and lifts the car 2 and the counterweight 4 in a slidable manner is disposed. In addition, a car position detection sensor 7 is attached to the hoisting machine 6 so that the car position signal indicating the position of the car 2 is output by detecting the rotation speed and rotation angle of the hoisting drum.

  A hall button 12 that outputs a car call signal in response to an operation is arranged at the top floor hall 11, and each hall button that outputs a car call signal in response to an operation is arranged at each hall 13 other than the top floor. In the car 2, an in-car operation panel 15 is arranged that outputs a call signal (destination floor signal) when the destination floor button is pressed.

  Further, in this embodiment, a human detection sensor 17 is installed in the pit 16 that forms the bottom of the elevator hoistway 5, and it is detected whether a maintenance person 18 is present in the pit 16. The human detection sensor 17 is a pyroelectric infrared sensor that detects a heat ray emitted by a person and outputs a signal, an infrared light emitting element, a transmission photoelectric sensor that detects the presence or absence of a person by combining the infrared light receiving element, or a reflection type sensor. A photoelectric sensor or an ultrasonic sensor that detects the presence or absence of a person using ultrasonic waves can be used. Here, in this embodiment, the “pit 16” is not only the bottom of the elevator hoistway 5 but a wide concept including the work space of maintenance personnel in the elevator hoistway 5 above the bottom by a predetermined distance. .

  Further, on the upper part of the elevator hoistway 5, the hoisting machine 6, the door opening / closing device and the like are driven based on the outputs of the landing buttons 12, the respective landing buttons 14, the in-car operating panel 15, and the human detection sensor 17. A control panel 19 for moving the car 2 up and down, stopping, opening and closing the door is disposed.

  As shown in FIG. 2, a plurality of relay coils 21, 22, 23, 24, 25,. The relay coil 21 is energized when the human detection sensor 17 detects the maintenance person 18 and the internal switch 26 is in the ON state (closed state), and opens the two break contacts 27 and 28. The relay coil 22 is excited when the break contact 27 is closed and the hall button 12 provided on the top floor is pressed, and outputs a car call signal on the top floor. The relay coil 23 is energized when the break contact 28 is closed and the destination button 31 indicating the highest floor is pressed among the destination buttons provided on the in-car operation panel 15 in the car 2. The floor car call signal is output. A plurality of relay coils 24 are provided. When each landing button 14 other than the top floor is pressed, the relay coil 24 is excited and outputs a car call signal indicating each landing 13 other than the top floor. A plurality of relay coils 23 are also provided, and when each destination button 32 other than the top floor is pressed among the destination buttons provided on the in-car operation panel 15 in the car 2, the top floor is excited. A call signal indicating each hall 13 other than is output. A plurality of relay coils (not shown) that output various signals such as an acceleration instruction signal, a constant speed instruction signal, a deceleration instruction signal, a drum brake release signal, and a door opening permission signal based on the output of the car position detection sensor 7 and the like. Yes).

<Operation>
When there is no maintenance person 18 in the pit 16 and the switch 26 provided inside the human detection sensor 17 is in the open state, the relay coil 21 of the control panel 19 is in a non-excited state, and each break contact 27 , 28 are closed.

  Accordingly, when the hall button 12 provided on the hall 11 on the top floor, the hall buttons 14 provided on the halls 13 other than the top floor, or the operation panel 15 in the car are operated, the hall buttons 12 are displayed. , 14, the operation contents of the in-car operation panel 15, the car position information output from the car position detection sensor 7, etc., the relay coils 22 to 25 are excited. As a result, various signals such as a call signal indicating the destination floor, a drum brake release signal, and a door opening permission signal are output, and the hoisting machine 10, each door opening / closing device, etc. operate, and passengers at the landings 11 and 13 It is possible to move to the destination floor.

  Further, when the maintenance person 18 is present in the pit 16 and the switch 26 provided in the human detection sensor 17 is in the closed state, the relay coil 21 of the control panel 19 is excited and each break contact 27, 28 is opened.

  In this state, the instruction of the landing button 14 provided on the landing 11 on the top floor and the instruction of the destination button 31 indicating the top floor provided on the in-car operation panel 15 in the car 2 are invalidated, and the counterweight The operation of the car 2 is restricted so that 4 does not go near the pit 16. This protects the maintenance staff 18 in the pit 16 from coming into contact with the counterweight 4.

  Even in such a case, each landing button 14 provided on each landing 13 other than the top floor and each destination button 32 other than the top floor provided on the in-car operation panel 15 in the car 2 are operated. At times, the relay coils 22, 23, etc. are excited according to the normal driving content, that is, the operation content of each landing button 14, the operation content of each destination button 32 provided on the operation panel 15 in the car, Various signals such as a call signal indicating a destination floor, a drum brake release signal, a door opening permission signal, and the like are output, and a passenger at each landing 13 can move to the destination floor.

  At this time, the position of the car 2 is always grasped by the control panel 19 based on the car position information output from the car position detection sensor 7 and the ascent speed and the descending speed of the car 2 are adjusted. .

  As a result, the car 2 rises and the car 2 is gradually decelerated as it approaches the floor one level below the top floor, etc., so that the lower part of the counterweight 4 slowly moves to the maintenance person 18 in the pit 16. The ascending speed of the car 2 is regulated so as to approach, and the safety of the maintenance staff 18 in the pit 16 is ensured.

As described above, in the first embodiment, whether or not the maintenance person 18 is present in the pit 16 is directly detected by the human detection sensor 17 installed in the pit 16, and when the maintenance person 18 is present in the pit 16. Thus, the operation of the car 2 is restricted so that the car 2 does not go to the top floor, and the counterweight 4 can be prevented from entering the pit 16. Therefore, it is possible to ensure the safety of the maintenance person 18 in the pit 16 without causing the maintenance person 18 entering the pit 16 to perform a special switch operation, for example, an operation of turning on a specific lighting fixture or the like. In the first embodiment, when the maintenance person 18 is in the pit 16, the car 2 is driven between the floor one level below the top floor and the bottom floor. For this reason, even when the maintenance staff 18 is present in the pit 16, it is possible to prevent the convenience of passengers using floors other than the top floor from being hindered.

  Furthermore, in the first embodiment, the position of the car 2 is always detected by the car position detection sensor 7. For this reason, when the car 2 rises and approaches the floor one level lower than the top floor, the car 2 is appropriately decelerated, and the lower part of the counterweight 4 and the like are maintenance personnel 18 in the pit 16. You can approach slowly. This can alert the maintenance staff 18 in the pit 16 and further ensure safety.

  Furthermore, in 1st Embodiment, when the maintenance person 18 exists in the pit 16, the instruction | indication of the landing button 14 provided in the top floor and the top floor provided in the in-car operation panel 15 in the car 2 are shown. The instruction of the destination button 31 is invalidated. Therefore, when there is a maintenance person 18 in the pit 16, the landing button 14 provided on the top floor and the destination button 31 indicating the top floor provided on the in-car operation panel 15 in the car 2 are erroneously operated. Even in this case, the lower part of the counterweight 4 and the like can be prevented from coming into contact with the maintenance person 18 in the pit 16, thereby ensuring the safety of the maintenance person 18 in the pit 16.

<Modification 1>
In the first embodiment described above, one human detection sensor 17 is attached to the hoistway wall surface of the pit 16. However, as shown in FIG. 3, for example, two person detection sensors 17 are used, one is provided on the lower surface of the counterweight 4, and the other is a hoistway wall different from the hoistway wall on which the counterweight 4 moves up and down. You may make it provide in. Thereby, when the counterweight 4 approaches the pit 16 by a predetermined distance, it becomes active and can detect the maintenance staff 18. In addition, the blind spot on the detection of the human detection sensor 17 can be eliminated, and even if one of the sensors breaks down, the presence of the maintenance staff 18 can be reliably detected. Various attachment modes are conceivable, such as providing a plurality of places for attaching the human detection sensor 17 on the wall surface of the hoistway or providing a plurality of places on the counterweight 4.

<Modification 2>
In the first embodiment described above, when a pyroelectric infrared sensor, a transmission photoelectric sensor, a reflection photoelectric sensor, an ultrasonic sensor, or the like is used as the human detection sensor 17 and the maintenance person 18 is in the pit 16, This is directly detected. However, a method of indirectly detecting whether or not the maintenance person 18 is present in the pit 16, for example, when a lighting fixture installed in the pit 16 is turned on, or a disable switch in the pit 16 (Disable switch) may be installed, and when this disable switch is turned on, it may be determined that there is a maintenance person 18 in the pit 16.

<Modification 3>
In the first embodiment described above, one type of sensor is selected and used as the human detection sensor 17 from a pyroelectric infrared sensor, a transmission photoelectric sensor, a reflection photoelectric sensor, an ultrasonic sensor, and the like. However, a combination of a plurality of types of sensors such as the pyroelectric infrared sensor, the transmission photoelectric sensor, the reflection photoelectric sensor, and the ultrasonic sensor is used to determine whether the maintenance person 18 is present in the pit 16. Anyway.

  By doing so, deficiencies in detection characteristics of the sensors can be covered with each other, and the safety of the maintenance staff 18 in the pit 16 can be more reliably ensured.

<Modification 4>
In the first embodiment described above, when the maintenance staff 18 is in the pit 16, the car 2 is driven between the floor one level below the top floor and the bottom floor. By regulating the operation of the car so that the car 2 can only move between the floor one level above the lowest floor and the floor one level below the top floor, the counterweight 4 and The car 2 may be prevented from entering the pit 16.

<Modification 5>
In the above-described embodiment, when the maintenance person 18 is in the pit 16, the operation of the car 2 is restricted so that the car 2 does not go to the top floor so that the counterweight 4 does not enter the pit 16. However, when the maintenance person 18 is in the pit 16, the operation of the car 2 is restricted so that the car 2 does not go to the top floor and the bottom floor, and the car 2 and the counterweight 4. May not enter the pit 16.

<Other embodiments>
As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Elevator system 2 ... Riding car 3 ... Main rope 4 ... Balance weight 5 ... Elevator hoistway 6 ... Hoisting machine 7 ... Position detection sensor 10 ... Hoisting machine 11, 13 ... Landing 12, 14 ... Landing button 15 ... Car Internal operation panel 16 ... Pit 17 ... Human detection sensor 18 ... Maintenance staff 19 ... Control panel 21, 22, 23, 24, 25, ... Relay coil 26 ... Switch 27, 28 ... Break contact 31, 32 ... Destination button

Claims (6)

A person detection sensor for detecting whether or not there is a person in the pit of the elevator hoistway where the riding car and the counterweight connected by the main rope move up and down;
When no person is detected by the person detection sensor, the motor is controlled to respond to a call from each landing button, a destination floor button on the operation panel in the car, and a check switch. When the person is detected by the person detection sensor, the controller for controlling the vertical movement of the car and controlling the operation so that the counterweight does not enter the pit;
An elevator operation control system comprising: The elevator operation control system according to claim 1,
The elevator operation control system, wherein the human detection sensor is installed in the pit or in the counterweight. The elevator operation control system according to claim 1,
A plurality of the human detection sensors are installed, either in the pit and in the counterweight, in a plurality of in the pit, or in a plurality of the counterweight An elevator operation control system characterized in that an installation mode is adopted. In the elevator operation control system according to any one of claims 1 to 3,
The elevator detection control system is characterized in that the person detection sensor is activated to detect a person when the car ascends an elevator hoistway and the counterweight approaches the pit by a predetermined distance. . The elevator operation control system according to any one of claims 1 to 4,
Install a car position detection sensor to detect the position of the car,
When the person is detected by the person detection sensor, the control unit uses the position information of the car output from the car position detection sensor to set the moving range of the car to the lowest floor and the top floor. And control the ascending / descending speed of the car.
An elevator operation control system characterized by the above. The elevator operation control system according to any one of claims 1 to 4,
When the person is detected by the human detection sensor, the control unit indicates the top floor among the instruction of the landing button provided on the top floor and each destination button provided on the in-car operation panel in the car. Disable the destination button instructions and prohibit calls to the top floor.
An elevator operation control system characterized by the above.

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