JP7308967B2 - Elevator control device, elevator control method and elevator system - Google Patents

Description

The present invention relates to an elevator control device, an elevator control method, and an elevator system.

2. Description of the Related Art When an elevator is installed in a building or the like, or when maintenance is performed after the elevator has been put into operation, it is necessary to perform maintenance and inspections such as adjusting the magnetic poles of the motor and adjusting the load sensor in order to ensure smooth operation of the elevator. In conventional maintenance and inspections, maintenance personnel have to climb on top of the car and inspect the equipment installed in the car, or the machines installed in the machine room at the top of the hoistway. there were. In this maintenance inspection, it is necessary to control the car so that maintenance personnel on other floors cannot operate the car by mistake.

Therefore, in Patent Document 1, "When the operation mode switching means provided at a predetermined location among a plurality of locations switches the operation mode to the inspection operation mode, the operation mode switching provided at another location and prevents the switching of the operation mode by the means and the switching of the rated speed by the speed switching means provided in other places."

JP 2006-117375 A

In recent elevators, an electric motor is often installed in the pit of the hoistway or near the height of the bottom floor of the hoistway. Various devices may be attached to the lower part of the car. During the maintenance and inspection of such elevators, maintenance personnel enter the pit to inspect the electric motors and devices under the car.

By the way, a pit is a space provided below the lowest floor (for example, the first floor) of a building. For this reason, when maintenance personnel are in the pit and the maintenance personnel on the floor or in the car raises or lowers the car, the state in the pit and the position of the car in the hoistway will be affected. Therefore, the car cannot be stopped at a position where the safety of the maintenance personnel can be secured, and accidents have occurred in which the car and counterweight come into contact with maintenance personnel. Also, in order to ensure the safety of maintenance personnel in the pit, if the movement range of the car is restricted, the stop position of the car may not be at a height where maintenance personnel in the pit can work easily. . When the operation of the car is restricted so as to ensure the safety of the maintenance personnel in the pit, the work of the maintenance personnel is inconvenient, resulting in a decrease in work efficiency.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the present invention is to improve work efficiency while ensuring the safety of maintenance personnel in the pit.

In the elevator control device according to the present invention, during maintenance and inspection of the elevator, the car is operated in a maintenance operation mode in which the moving speed of the car moving in the hoistway is controlled to be lower than the moving speed in the normal operation mode. At the bottom of the hoistway, there is an in-pit operation reception unit that receives operations performed by maintenance personnel who have entered the pit. and an in-pit operation unit that allows maintenance personnel in the pit to operate the car, and the in-pit operation reception unit notifies that there is a maintenance person in the pit. Second, the operation mode of the elevator is changed from the maintenance operation mode to the first restriction mode that restricts the movement of the car to a predetermined floor, or the second restriction mode that restricts the operation of the car from a place other than the pit. When the in-pit operation reception unit receives detection information from the maintenance personnel detection unit, the operation mode is changed from the maintenance operation mode to the first restriction mode, and the maintenance operation mode is changed to the first restriction mode. and, when the in-pit operation reception unit detects an operation performed by the in-pit operation unit to release the driving restricted by the first limit mode, the operation mode change is performed to change from the first limit mode to the second limit mode. and the operation of the car is controlled according to the first restriction mode or the second restriction mode changed by the operation mode change unit , and when the operation mode is the first restriction mode, the car is moved to the top floor and an operation control unit that limits the operation to move to the bottom floor and the operation to move to the lowest floor .

According to the present invention, when maintenance personnel are present in the pit during maintenance and inspection of the elevator, the operation mode of the elevator is changed from the maintenance operation mode to the first restriction mode or the second restriction mode. It is possible to improve the work efficiency while ensuring the safety of maintenance personnel in the field.
Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

1 is an overall configuration diagram of an elevator according to an embodiment of the present invention; FIG. 1 is an external view showing a configuration example of an in-pit operating panel according to an embodiment of the present invention; FIG. It is a block diagram showing an example of an internal configuration of an elevator control device concerning one embodiment of the present invention. 1 is a block diagram showing a hardware configuration example of a computer according to an embodiment of the present invention; FIG. 4 is a flow chart showing an example of control in maintenance and inspection of an elevator according to one embodiment of the present invention;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. In the present specification and drawings, constituent elements having substantially the same function or configuration are denoted by the same reference numerals, thereby omitting redundant description.

[One embodiment]
<Overall configuration example of elevator>
FIG. 1 is an overall configuration diagram of an elevator 1. As shown in FIG.
The elevator 1 includes a car 2 capable of moving up and down inside a hoistway 10. - 特許庁The hoistway 10 is provided with floors where the lowest floor is the 1st floor and the highest floor is the nth floor, and a pit that is dug down from the 1st floor (lowest floor) of the building.

This elevator 1 comprises a car 2, a car device 3, a tail cord 4, a pulley 5, a rope 6, a hoist 7 and a counterweight 8. Inside the hoistway 10, a wire mesh 11 for protecting a switchboard and the like (not shown) and an elevator control device 12 are provided.

The tail cord 4 communicates between the car 2 and a hoistway 10 along which the car 2 moves up and down. The tail cord 4 is generally a cord in which a plurality of multicore cables such as control lines and power lines and a steel cord or the like serving as a reinforcing material for supporting the weight of the tail cord 4 are coated with an insulating material. The tail cord 4 has a substantially rectangular cross section in order to prevent twisting, and has a length that takes into account the range of movement of the car 2 and is bent so that a curved portion is always generated.

The car 2 includes a door 2a, a passenger detection sensor 2b, an operation panel 2c and a switch box 2d. When the car 2 arrives at the destination floor indicated by the passenger using the operation panel 2c, the door 2a and the landing door (not shown) are opened. While the car 2 is moving, the door 2a and the landing door are closed. The door 2a is provided with a passenger detection sensor 2b for detecting the boarding and alighting of passengers. When a passenger passes through the open door 2a, the passenger detection sensor 2b detects that the passenger is getting on and off the car 2, and sends the detection result to the elevator control device 12 through the tail cord 4. - 特許庁

Further, during maintenance and inspection of the elevator 1, the switch box 2d provided in the car 2 is opened by the maintenance staff 32, and the maintenance staff 32 changes the operation mode of the elevator 1 from the normal operation mode through the switch box 2d. Change to driving mode. In the maintenance operation mode, the car 2 is controlled so as not to move even if a passenger presses a call button on each floor. In the maintenance operation mode, the moving speed of the car 2 moving on the hoistway 10 is controlled to be lower than the moving speed in the normal operation mode.

A car device 3 is attached to the bottom surface of the car 2, and one end of a tail cord 4 is connected. The car device 3 outputs to the elevator control device 12 through the tail cord 4, information such as opening/closing information of the door 2a and information on the number or weight of passengers boarding the car 2, and the like.

The other end of the tail cord 4 is connected to an elevator controller 12 installed in the hoistway. A control signal and electric power for controlling the operation of the car 2 are sent from the elevator control device 12 to the car 2 via the tail cord 4 . On the other hand, information such as the destination floor indicated by the passenger who got into the car 2 and the current floor where the car 2 is located is sent from the car 2 to the elevator control device 12 via the tail cord 4 .

Two sets of pulleys 5 are provided on the ceiling of the hoistway 10 . A car 2 is attached to one end of the rope 6 via a pulley 5 , and a counterweight 8 is attached to the other end of the rope 6 via a hoist 7 . A counterweight 8 is used to balance the car 2 connected to the rope 6 .

A wire mesh 11 is installed on one wall surface in the hoistway 10 where the elevator control device 12 is installed. Between the wire mesh 11 and the wall surface of the hoistway 10, an elevator control device 12 to which the other end of the tail cord 4 is connected, and various devices (not shown) are installed. The wire netting 11 is used to prevent the tail cord 4, which swings in the frontage direction as the car 2 rises and lowers, from coming into contact with equipment and the like installed in the hoistway 10. As shown in FIG.

A wireless communication device 15 is provided on the wall surface of each hall from the 1st floor to the nth floor. Maintenance terminals 31 and 33 used by maintenance personnel 30 and 32 can communicate with the elevator control device 12 through the wireless communication device 15 . The operation status of the elevator 1 output from the elevator control device 12 is displayed on the maintenance terminals 31 and 33 . The maintenance terminal 33 used on each floor (for example, the first floor) other than the pit can be used to control the movement of the car 2 to an arbitrary floor or to stop it in the middle of the floor. Further, maintenance results are output from the maintenance terminals 31 and 33 to the elevator control device 12 .

A wall surface of the hall on each floor may be provided with a communication connection section to which cables extended from the maintenance terminals 31 and 32 can be connected, for example. The maintenance terminals 31 and 32 may be configured so as to be capable of communicating with the elevator control device 12 through the communication connection unit, and may be configured without the wireless communication device 15 .

A hoist 7 is installed on the floor of the pit, and an in-pit operation panel 20 (an example of an in-pit operation section) is installed on the wall.

The in-pit operation panel 20 can be operated only by the maintenance personnel 30 in the pit, and the car 2 is operated through the in-pit operation panel 20. - 特許庁Operation information for operations performed through the in-pit operation panel 20 is output to the elevator control device 12 . When the elevator control device 12 determines that there is a maintenance worker in the pit based on the operation information received from the pit operation panel 20, the elevator control device 12 changes the operation mode of the elevator 1 to operate on each floor other than the pit (for example, the first floor). ) so that the maintenance person 32 in the car 2 cannot operate it. Maintenance personnel 30 in the pit operate the pit operation panel 20 to drive the car 2, operate the maintenance terminal 31, and operate the car device 3 provided under the floor of the car 2. , maintenance work to inspect the hoist 7 installed on the pit floor.

In the normal operation mode, under the control of the elevator control device 12, the hoisting machine 7 winds up the rope 6 and raises and lowers the car 2 to the destination floor indicated by the passenger while adjusting the moving speed of the car 2.例文帳に追加In the maintenance operation mode, under the control of maintenance personnel 32 on the floor, the hoist 7 winds up the rope 6 and the car 2 moves.

In this embodiment, a first restriction mode and a second restriction mode are prepared for the maintenance personnel 30 in the pit to instruct the operation of the car 2 . In the first restriction mode, the operation of moving the car 2 to predetermined floors (for example, the top floor and the bottom floor) is restricted. In the second restriction mode, maintenance personnel 30 can operate the pit operation panel 20 to move the car 2 to the top floor and the bottom floor. In the second restriction mode, maintenance personnel 30 in the pit can lower the car 2 to a height within reach of maintenance personnel 30 to inspect the car device 3 .

The maintenance operation mode according to this embodiment is changed to a first restriction mode or a second restriction mode, which will be described later with reference to FIG. 5 . Both the first restriction mode and the second restriction mode are examples of maintenance operation modes applied for the maintenance personnel 30 in the pit to safely instruct the car 2 to ascend and descend. Detailed contents of the first restriction mode and the second restriction mode will be described later.

<Configuration example of control panel in pit>
FIG. 2 is an external view showing a configuration example of the in-pit operating panel 20. As shown in FIG.
The in-pit operation panel 20 includes a human detection sensor 21 , a mode changeover switch 22 , and an elevation instruction switch 23 . The human detection sensor 21 is a device that operates automatically and does not require operation by maintenance personnel 30 . On the other hand, both the mode changeover switch 22 and the lift instruction switch 23 are operated by maintenance personnel 30 in the pit.

When the human detection sensor 21 detects the maintenance worker 30 in the pit, it outputs detection information to the in-pit operation reception unit 41 (see FIG. 3 described later) of the elevator control device 12 . As the human detection sensor 21, a pyroelectric infrared sensor that detects heat rays emitted by a person and outputs a signal, an infrared light emitting element or a transmission type photoelectric sensor that detects the presence or absence of a person by combining this infrared light receiving element, a reflection type sensor, or a reflective type sensor. A photoelectric sensor or an ultrasonic sensor that detects the presence or absence of a person using ultrasonic waves may be used. A camera capable of imaging the inside of the pit may be used as the human detection sensor 21 .

Note that the human detection sensor 21 may be attached to a location away from the in-pit operation panel 20 . Also, by attaching a plurality of human detection sensors 21 to each wall in the pit, blind spots may be eliminated and maintenance personnel 30 in the pit may be reliably detected.

The mode changeover switch 22 can switch the operation mode of the elevator 1 to either a maintenance operation mode or an in-pit maintenance operation mode. The in-pit maintenance operation mode may be rephrased as a second restriction mode. By turning the mode changeover switch 22 to the OFF position, the operation mode is switched to the maintenance operation mode.

The elevation instruction switch 23 is a switch for the maintenance personnel 30 in the pit to operate to raise or lower the car 2 in the second restriction mode. The ascending/descending speed of the car 2 moved by operating the ascending/descending instruction switch 23 is made lower than the speed in the maintenance operation mode for safety. When maintenance personnel 30 presses the upward arrow button of lift instruction switch 23 , a lift signal is output to elevator control device 12 . Therefore, maintenance personnel 30 in the pit can raise the car 2 by operating the pit operation panel 20 .

On the other hand, when the maintenance worker 30 presses the downward arrow button of the lift instruction switch 23 , a descending signal is output to the elevator control device 12 . Therefore, maintenance personnel 30 in the pit can operate the pit operation panel 20 to lower the car 2 .

<Example of internal configuration of elevator control device>
FIG. 3 is a block diagram showing an internal configuration example of the elevator control device 12. As shown in FIG.
The elevator control device 12 includes an in-pit operation reception unit 41 , an operation mode change unit 42 and an operation control unit 43 .

During maintenance and inspection of the elevator 1, the in-pit operation reception unit 41 receives an in-pit operation performed by the maintenance worker 30 who has entered the pit below the hoistway 10 while the car is being operated in the maintenance operation mode. Operations in the pit are performed through the pit operation panel 20 . A maintenance worker 30 presses the lift instruction switch 23 of the pit operation panel 20 to gradually lower the car 2 while looking at the bottom of the car 2 from the pit, and raise the car to a height that facilitates maintenance. 2 can be stopped. The information received by the in-pit operation receiving unit 41 also includes detection information output from the human detection sensor 21 (see FIG. 2). Upon receiving the detection information, the in-pit operation reception unit 41 notifies the operation mode change unit 42 that maintenance personnel 30 are in the pit.

The operation mode changing unit 42 changes the operation mode to either the normal operation mode or the maintenance operation mode set in the switch box 2d. When the operation mode changing unit 42 is in the maintenance operation mode and the in-pit operation reception unit 41 notifies that the maintenance worker 30 is in the pit, the operation mode changing unit 42 changes the operation mode of the elevator 1 to the maintenance operation mode. mode to the first restricted mode or the second restricted mode. Therefore, when the in-pit operation reception unit 41 receives detection information from the human detection sensor 21 (see FIG. 2), the operation mode changing unit 42 changes the operation mode from the maintenance operation mode to the first restriction mode. . However, when the detection information is not input from the human detection sensor 21, the operation mode changing unit 42 determines that the maintenance worker 30 is not in the pit, and does not change the maintenance operation mode.

The operation mode change unit 42 changes the maintenance operation mode to the first restriction mode, and the in-pit operation reception unit 41 performs an operation to cancel the operation restricted by the first restriction mode performed on the in-pit operation panel 20. (For example, pressing of the lifting instruction switch 23) is detected, the mode is changed from the first restriction mode to the second restriction mode. After that, when the in-pit operation reception unit 41 detects an operation (for example, turning off the mode changeover switch 22) to restrict the driving in the first limit mode performed on the in-pit operation panel 20. Second, the operation mode is changed from the second restriction mode to the first restriction mode. Then, when the in-pit operation reception unit 41 no longer receives detection information from the human detection sensor 21, the operation mode change unit 42 changes from the first restriction mode to the maintenance operation mode.

The operation control unit 43 controls the operation of the car 2 according to the operation mode (normal operation mode, maintenance operation mode, first restriction mode, or second restriction mode) changed by the operation mode changing unit 42 . In the maintenance operation mode, control signals from the maintenance terminals 31 and 33 are input to the operation control unit 43 . Therefore, the operation of the car 2 is controlled by the maintenance staff 30 operating the maintenance terminal 31 or the maintenance staff 32 operating the maintenance terminal 33 .

The operation control unit 43 according to the present embodiment controls the operation of the car 2 according to the first restriction mode or second restriction mode changed from the maintenance operation mode by the operation mode changing unit 42 . Specifically, when the operation mode is the first restriction mode, the operation control unit 43 restricts the operation of moving the car 2 to the top floor and the operation of moving the car 2 to the bottom floor. In addition, the operation control unit 43 enables the car 2 to move to the top floor and the bottom floor by operating the in-pit operation panel 20 in the second restriction mode. Then, the operation control unit 43 lowers or raises the car 2 in accordance with the operation of the in-pit operating panel 20 . Note that the operation control unit 43 controls the speed at which the car 2 is lowered or raised in the second restriction mode to be lower than the movement speed controlled in the maintenance operation mode.

<Computer hardware configuration example>
Next, the hardware configuration of the computer 50 that constitutes the elevator control device 12 will be described.
FIG. 4 is a block diagram showing a hardware configuration example of the computer 50. As shown in FIG. The computer 50 is an example of hardware used as a computer operable as the elevator control device 12 .

The computer 50 includes a CPU (Central Processing Unit) 51 , a ROM (Read Only Memory) 52 , and a RAM (Random Access Memory) 53 connected to a bus 54 . Further, computer 50 includes non-volatile storage 55 and network interface 56 .

The CPU 51 reads the program code of the software that implements each function according to the present embodiment from the ROM 52, loads it into the RAM 53, and executes it. Variables, parameters, etc. generated during the arithmetic processing of the CPU 51 are temporarily written in the RAM 53, and these variables, parameters, etc. are read by the CPU 51 as appropriate. However, an MPU (Micro Processing Unit) may be used instead of the CPU 51 . Each function of the in-pit operation reception unit 41, the operation mode change unit 42, and the operation control unit 43 of the elevator control device 12 shown in FIG.

As the nonvolatile storage 55, for example, HDD (Hard Disk Drive), SSD (Solid State Drive), flexible disk, optical disk, magneto-optical disk, CD-ROM, CD-R, magnetic tape, nonvolatile memory, or the like is used. be done. The nonvolatile storage 55 stores an OS (Operating System), various parameters, and programs for making the computer 50 function. The ROM 52 and the non-volatile storage 55 permanently record programs and data necessary for the operation of the CPU 51, and are computer-readable non-transitory recording media storing programs executed by the computer 50. used as an example of In the nonvolatile storage 55 , for example, operation information of the elevator 1 , failure information, etc. are recorded together with the occurrence time of each information, and can be read by the maintenance terminals 31 and 33 .

For example, a NIC (Network Interface Card) or the like is used as the network interface 56, and various data can be transmitted and received between devices via a LAN (Local Area Network), a dedicated line, or the like connected to the terminal of the NIC. It is possible. Further, the network interface 56 can transmit operation information of the elevator 1, failure information, etc. to a monitoring center that monitors the operation of the plurality of elevators 1. FIG. Upon receiving the fault information, the monitoring center takes measures to direct maintenance personnel 30 and 32 to the elevator 1 in which the elevator control device 12 that has transmitted the fault information is installed.

<Elevator control flow>
FIG. 5 is a flow chart showing an example of control in maintenance and inspection of the elevator 1. As shown in FIG. The elevator control device 20 according to the present embodiment realizes an elevator control method performed by cooperation of the functional blocks shown in FIG.

First, the in-pit operation reception unit 41 determines whether or not the human detection sensor 21 has detected that the maintenance worker 30 is in the pit (S1). If the detection information is not output from the human detection sensor 21, the human detection sensor 21 has not detected the maintenance worker 30 in the pit (NO in S1). The elevator 1 is operated in the normal operation mode or in the maintenance operation mode (S2).

On the other hand, if detection information is output from the human detection sensor 21, the human detection sensor 21 has detected the maintenance worker 30 in the pit (YES in S1). In this case, the in-pit operation receiving unit 41 notifies the operation mode changing unit 42 that the maintenance worker 30 is in the pit. The operating mode changing unit 42 that has received this notification changes the operating mode to the first restriction mode (S3). In the first restricted mode, the moving speed of the car 2 is restricted to a speed lower than the normal speed.

Next, the operation control unit 43 restricts the operation of moving the car 2 to the top floor and the operation of moving the car 2 to the bottom floor according to the first restriction mode (S4). When driving to the top floor is restricted, the car 2 does not move to the top floor, so the counterweight 8 does not descend to the pit. Also, since the car 2 does not move to the lowest floor, the car 2 does not descend to the pit. In either case, it is possible to prevent the car 2 or the counterweight 8 from descending to a height not intended by the maintenance personnel 30 in the pit.

Next, the in-pit operation reception unit 41 determines whether or not the descent operation restriction has been lifted in the pit (S5). The release of the descent operation restriction in the pit means that the mode changeover switch 22 of the in-pit operation panel 20 shown in FIG. It is determined whether or not a signal has been input to the in-pit operation reception unit 41 . If the descent operation restriction has not been lifted in the pit (NO in S5), the process proceeds to step S11.

If the descent operation restriction has been lifted in the pit (YES in S5), the operation mode changing unit 42 is notified by the in-pit operation receiving unit 41 that the descent operation restriction has been lifted. Therefore, the operating mode changing unit 42 changes the operating mode to the second restriction mode (S6). In the second restricted mode, car operation from outside the pit is disabled. Therefore, for example, even if maintenance personnel 32 on the first floor or maintenance personnel riding in the car 2 try to move the car 2 or open the door 2a, they cannot operate.

The operation control unit 43 enables the car 2 to be driven downward only by the operation in the pit according to the second restriction mode (S7). A maintenance worker 30 in the pit pushes the downward arrow button of the elevation instruction switch 23 of the pit operation panel 20 shown in FIG. 2 to lower the car 2 to an arbitrary height. Upon receiving the descent signal output from the elevation instruction switch 23 , the in-pit operation reception unit 41 turns on the descent flag only while the descent signal is output to the operation control unit 43 . The operation control unit 43 gradually moves the car 2 downward while the descent flag is turned on. Then, when the maintenance worker 30 releases the downward arrow button of the elevation instruction switch 23, the descent signal is turned off. Therefore, the operation control unit 43 stops moving the car 2 . Then, when the car 2 descends to an arbitrary height, the maintenance person 30 can inspect the car device 3. - 特許庁

In the second restriction mode, in order to correct excessive movement of the car 2, it is also possible to drive the car 2 upward only by operating in the pit. A maintenance worker 30 in the pit pushes the upward arrow button of the elevation instruction switch 23 of the pit operation panel 20 to raise the car 2 to an arbitrary height. When the in-pit operation receiving unit 41 receives the lift signal output from the lift instruction switch 23 , the lift flag is turned on only while the lift signal is output to the operation control unit 43 . The operation control unit 43 gradually moves the car 2 upward while the lift flag is turned on. Then, when the maintenance worker 30 releases the upward arrow button of the lift instruction switch 23, the lift signal is turned off. Therefore, the operation control unit 43 stops moving the car 2 .

Next, the in-pit operation receiving unit 41 determines whether or not to cancel the descent operation restriction in the pit (S8). Releasing the descent operation restriction in the pit means that the mode switching switch 22 of the in-pit operation panel 20 shown in FIG. 2 has been switched from the "in-pit maintenance operation mode" to "OFF". It is determined whether or not a signal has been input to the in-pit operation reception unit 41 . If the in-pit operation receiving unit 41 does not determine to cancel the descent operation restriction cancellation in the pit (NO in S8), it continues to monitor the judgment in step S8 as to whether or not to cancel the descent operation restriction cancellation. do.

On the other hand, when the in-pit operation receiving unit 41 determines that the descent operation restriction is to be canceled in the pit (YES in S8), the operation control unit 43 restricts the operation of the car 2 to the lowest floor ( S9). At this time, the operating mode changing unit 42 changes the operating mode to the first restriction mode. After the mode is changed to the first restriction mode, when the car 2 rises to the first floor, the operation control unit 43 controls the car 2 to be movable only to floors higher than the first floor. Therefore, since the car 2 does not descend to the pit, the maintenance worker 30 can safely leave the pit.

Next, the operation control unit 43 validates car operation from other than the pit (S10). At this time, the operation mode changing unit 42 changes the operation mode from the first restriction mode to the maintenance operation mode. Therefore, for example, maintenance personnel 32 on the first floor and maintenance personnel riding in the car 2 can move the car 2 and open and close the door 2a.

Next, the operation control unit 43 determines whether or not there is a maintenance worker in the pit (S11). For example, when the in-pit operation reception unit 41 receives that an operation is performed through the in-pit operation panel 20, the operation control unit 43 can determine that a maintenance worker is in the pit. When the operation control unit 43 determines that there is a maintenance worker in the pit (YES in S11), the operation control unit 43 returns to step S5 and continues to determine whether or not the descent operation restriction has been lifted in the pit.

On the other hand, when the operation control unit 43 determines that there is no maintenance worker in the pit (NO in S11), the operation control unit 43 returns to step S1 to determine whether the human detection sensor 21 has detected that the maintenance worker 30 is in the pit. continue to judge.

In the elevator 1 according to the embodiment described above, the operation of the car 2 is restricted when the maintenance worker 30 is in the pit. Here, in the first restriction mode, the operation is restricted so that the car 2 does not move to the top floor and the bottom floor, so the car 2 and the counterweight 8 descend to a height not intended by the maintenance personnel 30. driving is avoided.

Further, in the second restriction mode, car operation from outside the pit is disabled. In other words, only the operation by maintenance personnel 30 through the in-pit operation panel 20 is valid. Therefore, the maintenance staff 30 can lower the car 2 to a safe height and inspect the car device 3 . Thus, when maintenance personnel 30 are present in the pit, the operation mode of the elevator is changed from the maintenance operation mode to the first restriction mode or the second restriction mode. Work efficiency can be improved while ensuring.

[Modification]
In the above-described embodiment, after the operation mode of the elevator is changed from the maintenance operation mode to the first restriction mode through operation of the pit operation panel 20, the car 2 can be operated in the second restriction mode. became. However, in the pit, instead of the in-pit operating panel 20, a communication connection section connected to the elevator control device 12 may be provided. Then, the maintenance worker 30 in the pit connects the maintenance terminal 31 to the communication connection unit provided in the pit, and instructs to change the operation mode from the maintenance operation mode to the first restriction mode through the maintenance terminal 31. , the operation of the car 2 in the second restricted mode may be enabled.

In addition, if the maintenance worker 30 leaves the pit but forgets to set the mode changeover switch 22 to the "pit maintenance operation mode", the car 2 is moved to an arbitrary location within the hoistway 10. I can't do the inspection to make it work. Therefore, the driving mode changing unit 42 prevents the in-pit operation receiving unit 41 from receiving detection information from the human detection sensor 21 for a predetermined period of time or longer when the driving mode is the first restriction mode or the second restriction mode. case, the operation mode is changed from the first restriction mode or the second restriction mode to the maintenance operation mode. By changing to the maintenance operation mode, maintenance personnel 32 on the floor can operate the car 2 . When the mode switching switch 22 remains in the "intra-pit maintenance operation mode" for a predetermined period of time, the operation control unit 43 notifies the maintenance terminals 31 and 32 that the mode switching switch 22 has been forgotten to return. An alarm may be issued.

The present invention is not limited to the above-described embodiments, and it goes without saying that various other applications and modifications can be made without departing from the gist of the present invention described in the claims.
For example, the above-described embodiment describes the structure of the elevator in detail and specifically in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to those having all the structures described. Moreover, it is possible to add, delete, or replace a part of the configuration of this embodiment with another configuration.
Further, the control lines and information lines indicate those considered necessary for explanation, and not all control lines and information lines are necessarily indicated on the product. In practice, it may be considered that almost all configurations are interconnected.

DESCRIPTION OF SYMBOLS 1... Elevator, 3... Car apparatus, 7... Hoisting machine, 10... Hoistway, 12... Elevator control device, 20... Operation panel in a pit, 21... Human detection sensor, 22... Mode changeover switch, 23... Lifting instruction Switch 31 Maintenance terminal 41 In-pit operation reception unit 42 Operation mode change unit 43 Operation control unit

Claims (9)

In the maintenance and inspection of the elevator, while the car is operated in a maintenance operation mode in which the moving speed of the car moving in the hoistway is controlled to be lower than the moving speed in the normal operation mode, the lower part of the hoistway an in-pit operation reception unit that receives in-pit operations performed by maintenance personnel who entered a certain pit;
In the pit, a maintenance worker detection unit that outputs detection information to the in-pit operation reception unit when the maintenance worker in the pit is detected, and a maintenance worker in the pit that can operate the car. and an in-pit operation unit is provided, and when the in-pit operation reception unit notifies that the maintenance worker is in the pit, the operation mode of the elevator is changed from the maintenance operation mode to the car. to a first restriction mode that restricts movement to a predetermined floor, or to a second restriction mode that restricts the operation of the car performed from a place other than the pit , and the in-pit operation reception unit receives the maintenance personnel When the detection information is received from the detection unit, the operation mode is changed from the maintenance operation mode to the first restriction mode, and in the state where the maintenance operation mode is changed to the first restriction mode, the inside of the pit an operation mode changing unit configured to change from the first restriction mode to the second restriction mode when the operation receiving unit detects an operation performed by the in-pit operation unit to release the operation restricted by the first restriction mode; and,
The operation of the car is controlled according to the first limit mode or the second limit mode changed by the operation mode changing unit , and when the operation mode is the first limit mode, the car and an operation control unit that restricts the operation of moving the elevator to the top floor and the operation of moving the elevator to the bottom floor . 2. The elevator control device according to claim 1 , wherein in the second restriction mode, the operation control unit enables the car to move to the top floor and the bottom floor by operating the in-pit operation unit. . The maintenance personnel in the pit can operate the pit operation unit to lower the car,
The elevator control device according to claim 2 , wherein the operation control section lowers the car in accordance with the operation of the in-pit operation section. The elevator control device according to claim 2 , wherein the operation control unit controls the speed at which the car is lowered in the second limit mode to be lower than the movement speed controlled in the maintenance operation mode. The maintenance personnel in the pit can operate the pit operation unit to raise the car,
The elevator control device according to claim 2 , wherein the operation control unit raises the car in accordance with the operation of the in-pit operation unit. The driving mode changing unit switches the driving mode to the second restriction mode when the in-pit operation receiving unit detects an operation performed by the in-pit operation unit to restrict driving in the first restriction mode. to the first restricted mode. The operation mode changing unit is configured such that, when the operation mode is the first restriction mode or the second restriction mode, the in-pit operation reception unit receives the detection information from the maintenance personnel detection unit for a predetermined time or more. is not accepted , the operation mode is changed from the first restriction mode or the second restriction mode to the maintenance operation mode. In the maintenance and inspection of the elevator, while the car is operated in a maintenance operation mode in which the moving speed of the car moving in the hoistway is controlled to be lower than the moving speed in the normal operation mode, the lower part of the hoistway a step in which an in-pit operation reception unit receives an in-pit operation performed by a maintenance worker who has entered a certain pit ;
In the pit, a maintenance worker detection unit that outputs detection information to the in-pit operation reception unit when the maintenance worker in the pit is detected, and a maintenance worker in the pit that can operate the car. a first restriction mode for restricting movement of the car from the maintenance operation mode to a predetermined floor when notified that the maintenance worker is in the pit ; Alternatively , the operation is changed to a second restriction mode that restricts the operation of the car performed from a place other than the pit, and when the in-pit operation reception unit receives the detection information from the maintenance personnel detection unit, the operation is performed. The mode is changed from the maintenance operation mode to the first restriction mode, and in the state in which the maintenance operation mode is changed to the first restriction mode, the in-pit operation receiving unit is the in-pit operation unit. changing from the first restriction mode to the second restriction mode when an operation to release the operation restricted by the first restriction mode is detected;
The operation of the car is controlled according to the changed first limit mode or second limit mode, and when the operation mode is the first limit mode, the car is moved to the top floor. a step of restricting operation and operation to move to the lowest floor . a car that travels down the hoistway,
A pit operation unit operated in the pit by maintenance personnel who entered the pit at the bottom of the hoistway;
an elevator control device that controls the operation of the car according to the operation in the pit during maintenance and inspection of the elevator;
The elevator control device includes:
Maintenance who entered the pit at the bottom of the hoistway while the car was being operated in a maintenance operation mode in which the moving speed of the car moving in the hoistway was controlled to be lower than the moving speed in the normal operation mode. an in-pit operation reception unit that receives in-pit operations performed by staff;
In the pit, a maintenance worker detection unit that outputs detection information to the in-pit operation reception unit when the maintenance worker in the pit is detected, and a maintenance worker in the pit that can operate the car. and an in-pit operation unit is provided, and when the in-pit operation reception unit notifies that the maintenance worker is in the pit, the operation mode of the elevator is changed from the maintenance operation mode to the car. to a first restriction mode that restricts movement to a predetermined floor, or to a second restriction mode that restricts the operation of the car performed from a place other than the pit , and the in-pit operation reception unit receives the maintenance personnel When the detection information is received from the detection unit, the operation mode is changed from the maintenance operation mode to the first restriction mode, and in the state where the maintenance operation mode is changed to the first restriction mode, the inside of the pit an operation mode changing unit configured to change from the first restriction mode to the second restriction mode when the operation receiving unit detects an operation performed by the in-pit operation unit to release the operation restricted by the first restriction mode; and,
The operation of the car is controlled according to the first limit mode or the second limit mode changed by the operation mode changing unit , and when the operation mode is the first limit mode, the car an operation control unit that restricts the operation of moving the elevator to the top floor and the operation of moving the elevator to the bottom floor .

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