KR20130129430A - Safety control device for elevator - Google Patents

Abstract

In the safety control device of an elevator, the plurality of landing door switches are divided into a plurality of systems. The safety control unit can recognize the opening of the landing door independently for each system of the landing door switch. In addition, the safety control unit may be configured to have two or more systems when the car gate switch indicates the door closed state, when the landing door switch of a system indicates the door open state, and when the car gate switch indicates the door open state. When the landing door switch shows the door open state, the movement of the maintenance worker to the lifting path is detected.

Description

Safety control device of elevator {SAFETY CONTROL DEVICE FOR ELEVATOR}

The present invention relates to a safety control device of an elevator for controlling the operation of the elevator in terms of safety.

In modern elevators, the machine-roomless type, which does not have a machine room and is provided with a hoist or a control device in a hoistway, has become mainstream. For this reason, at the time of repair of an elevator apparatus, the frequency with which a repairman enters a hoistway and performs repair work is increasing.

For example, when the hoisting machine or the control device is installed in the upper part of the hoistway, the maintenance worker rides on the car and performs maintenance work on the hoisting machine or the control device. Moreover, also when repairing a landing door apparatus, various switches in a hoistway, etc., a maintenance worker rides on a car and performs maintenance work. In addition, when the hoist and the control device are installed in the lower part of the hoistway, the maintenance worker enters the hoistway pit to perform the maintenance work of the hoister and the control device.

An overtravel limiting switch is provided on the upper and lower portions of the hoistway in order to secure a space for evacuation of the crew during such repair work, and the elevator exceeds the excess travel limiting switch during the maintenance operation. The cell is prevented from moving. Moreover, when a maintenance worker enters a pit and performs maintenance work, or when getting on a car and performing maintenance work, it is necessary to be careful about a car running suddenly.

In addition, in a conventional elevator, the maintenance worker detects that the elevator door is unlocked and automatically stops the operation of the car, thereby preventing the car from running suddenly (for example, the patent document). 1).

In addition, in another conventional elevator, by installing a special device, the maintenance worker detects that the danger zone has entered the hoistway, and shifts the operation of the car to the special operation mode, thereby preventing the elevator from moving into the danger zone. (See, for example, Patent Document 2).

Patent Document 1: Japanese Patent Application Laid-Open No. 8-91730 Patent Document 2: Japanese Patent Application Laid-Open No. 2004-5347070

In the conventional apparatus as described above, there is a problem that additional equipment for detecting the movement of the maintenance worker to the hoistway is required, and the cost is high.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to obtain an elevator safety control device capable of efficiently detecting movement of a maintenance worker into a hoistway by using an existing device efficiently. It is done.

The safety control device for an elevator according to the present invention is input from a car gate switch detecting an opening of a car door, a plurality of landing door switches detecting an opening of a plurality of landing doors, and a car gate switch and a landing door switch. The safety control part which carries out safety control based on the information to be provided, The landing door switch is divided into several systems, The safety control part can recognize the opening of a landing door independently for every system of a landing door switch, When the door gate switch of a system shows the door open state, when the cage gate switch shows the door closed state, and when the cage gate switch shows the door open state, two or more platform door switches open the door. Indicate open state In the case, thereby detecting a movement of a circle of the maintenance elevator shaft.

The elevator safety control device of the present invention efficiently utilizes existing car gate switches and landing door switches, and provides low and low cost for maintenance workers in each case when the car door is closed and when the car door is closed. The movement to the furnace can be detected more reliably.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the machine roomless type elevator which concerns on Embodiment 1 of this invention.
FIG. 2 is a block diagram illustrating a safety control device of the elevator of FIG. 1.
FIG. 3 is a flowchart illustrating safety control processing in the safety control unit of FIG. 1.
4 is a flowchart illustrating a reset process of automatic operation in the safety control unit of FIG. 1.
It is a block diagram which shows the machine roomless type elevator which concerns on Embodiment 2 of this invention.
It is a block diagram which shows the machine roomless type elevator which concerns on Embodiment 3 of this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

Embodiment 1

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the machine roomless type elevator which concerns on Embodiment 1 of this invention. In the figure, the hoisting machine 2 is provided in the lower part of the hoistway 1. The hoist 2 has a drive sheave, a hoisting motor which rotates a drive sheave, and a hoisting brake which brakes rotation of a drive sheave. Suspension means (not shown) are wound around the drive sheave. As the suspension means, a plurality of ropes or a plurality of belts are used.

The car 3 and the counterweight (not shown) are suspended in the hoistway 1 by the suspension means, and the hoist 2 lifts. In the lower part of the hoistway 1, the elevator control apparatus (control panel) 4 which controls the hoisting machine 2 is provided. The elevator control apparatus 4 has the operation control part 21 and the safety control part 22 which control the operation of the car 3.

In the driving mode of the car 3 by the driving control unit 21, an autonomous driving mode (normal driving mode) and a maintenance driving mode (manual driving mode) in response to a call from the landing and the car 3 are provided. Included. The safety controller 22 may instruct the driving controller 21 in the driving mode.

The landing door of each floor is opened and closed by the landing door 5. By opening the boarding point door 5 of the lowest floor, the movement of the maintenance source to the pit 1a which is the lowest part of the hoistway 1 is attained. In addition, by opening the landing doors 5 other than the lowermost floor, it is possible to move the maintenance staff onto the car 3 stopped below the floor.

The landing door 5 of each floor is provided with the landing door switch 6 which detects the open state of the landing door 5. Such a landing door switch 6 is provided as standard in a general elevator apparatus.

In addition, the landing door switch 6 is a lower floor landing door switch 6a for detecting the opening of the lowermost landing door 5, and a plurality of odd floor landing halls for detecting opening of the landing door 5 of the odd floor except the lowest floor. It is divided into three systems of the door switch 6b and the several even floor landing door switch 6c which detects the opening of the landing door 5 of an even floor.

Note that the odd-numbered and even-numbered floors here are not the number of floors in the actual building, but the number of floors when the floor with the landing door 5 is provided in order from the bottom with the lowest floor as the first floor. Therefore, the odd floor landing door switch 6b and the even floor landing door switch 6c are alternately arranged every one floor.

The signal of the landing door switch 6 is input to the elevator control apparatus 4 independently for every said system. Further, the odd floor landing door switch 6b and the even floor landing door switch 6c are connected in series for each system. Therefore, the elevator control device 4 can independently recognize the opening of the lowest landing platform door 5, the odd landing platform door 5 and the even floor landing door 5 for each system of the landing door switch 6. Do.

In the pit 1a, which is the lowermost part of the hoistway 1, the in-pit maintenance operation mode changeover switch (automatic operation disabling switch) 9 for switching the operation mode to the maintenance operation mode and the car 3 are in the maintenance operation mode. An in-pit maintenance driving device 10 for driving in a road is provided. The in-pit maintenance driving mode changeover switch 9 and the in-pit maintenance driving device 10 are arranged close to each other, and are electrically connected to the elevator control device 4.

The lowest floor platform is provided with a first reset switch 11 for resetting the switching of the driving mode to return the driving mode to the automatic driving mode. In the platform of predetermined floors other than the lowest floor (for example, 2nd floor), the 2nd reset switch 12 for resetting switching of a driving mode and returning a driving mode to an automatic driving mode is provided. The reset switches 11 and 12 are electrically connected to the elevator control device 4.

The car door is opened and closed by the car door 13. When the car 3 lands in the door zone during normal operation, the car door 13 is engaged with the landing door 5 of the floor. As a result, the landing door 5 is opened and closed in conjunction with the car door 13.

On the cage | basket | car 3, the door operator (elevator cage | floor station) 14 which controls opening and closing of the cage | basket | car door 13 is provided. The door operator 14 has a car maintenance mode switching switch (automatic operation disabling switch) 15 for switching the operation mode to the maintenance operation mode, and a car for driving the car 3 in the maintenance operation mode. The reward maintenance apparatus 16 is provided. The car maintenance operation mode changeover switch 15 and the car maintenance operation apparatus 16 are arrange | positioned near each other, and are electrically connected to the elevator control apparatus 4.

In this way, the pit maintenance repair mode switching switch 9, the pit repair operation apparatus 10, the car up maintenance operation mode changeover switch 15, and the car up maintenance operation apparatus 16 are all in the hoistway (1). It is arranged inside. For this reason, in order to operate these, a maintenance worker artificially opens the landing door 5 and enters into the hoistway 1.

The car door 13 is provided with a car gate switch 17 that detects an open state of the car door 13. In the lower part of the hoistway 1, the maintenance operation lower limit switch 18 which restricts the fall of the cage | basket | car 3 at the time of maintenance operation is provided. The upper part of the hoistway 1 is provided with the maintenance operation upper limit switch 19 which restricts the lift of the cage | basket | car 3 at the time of maintenance operation. The elevator cage | basket | car 3 is operated to operate the limit switches 18 and 19. FIG. The cam 20 is provided.

The safety control part 22 is a case where the gate door switch 6 of any system showed the door open state, and the car gate switch 17 when the car gate switch 17 showed the door closed state. When the door open state is indicated by the door, when the landing door switch 6 of the two or more systems shows the door open state, the movement of the maintenance worker to the hoistway 1 is detected and the automatic operation is invalidated. When the control of the safety control part 22 is divided into the case where the cage | basket | car door 13 is closed and the case where it is open, it becomes the following safety control logics 1 and 2. As shown in FIG.

Safety control logic 1.

The safety control unit 22 monitors the state of the car gate switch 17 and the three landing door switches 6a, 6b, and 6c so that when the car gate switch 17 is on, that is, the car door 13 ) When the landing door switch 6a, 6b, 6c is turned off, i.e., when it detects that the landing door 5 is open (not all closed), automatic operation is performed. Invalidate.

Safety control logic 2.

When the car gate switch 17 is off, that is, when the car door 13 is open, the safety control unit 22 turns off two or more of the landing door switches 6a, 6b, 6c. That is, when it detects that the landing door 5 of two or more systems opened the door, automatic operation is invalidated.

Usually, when a maintenance worker enters the pit 1a for maintenance work, the landing door 5 of the lowest floor is opened and it enters the pit 1a. Moreover, when a maintenance worker gets on the car 3, the landing door of the floor immediately above the stop floor of the car 3 (or after stopping the car 3 just below the floor on which it is going to ride) Open (5) and get on the car (3). At this time, normally, only the landing door 5 will be in an open state. Therefore, by controlling by the said safety control logic 1, most cases of the movement to the pit 1a and the car 3 of a maintenance worker can be detected.

However, as a rare case, the car 3 during autonomous operation stops on a certain floor, and both the car door 13 and the landing door 5 are open, and the maintenance worker makes a pit 1a or an elevator. There may be occasions to move above compartment (3). As a countermeasure in that case, even if both the car door 13 and the landing door 5 are in an open state on a certain floor by the control of the safety control logic 2 described above, the lowermost floor leading to the pit 1a is provided. The landing door 5 of the landing or the landing door 5 of the floor immediately above the stationary floor of the car 3 leading over the car 3, that is, opening of the landing door 5 of two or more systems is detected. Can detect the movement of maintenance personnel.

In addition, when the safety control part 22 invalidates automatic operation, the 1st reset switch 11 or the 2nd reset switch 12 which is outside the hoistway 1 is operated by a maintenance worker, and a reset signal is provided. The automatic operation is continued to be invalidated until it is received and further confirms the fully closed state of all the landing doors 5 and the car doors 13. When the power supply is reset due to a power failure or the like, automatic operation is invalidated for safety.

When the automatic control of the elevator is invalidated by the safety control unit 22, the maintenance worker changes the operation mode by the maintenance operation mode changeover switch 9 in the pit or the maintenance operation mode changeover switch 15 on the car. It is possible to switch to the manual operation (maintenance operation or inspection operation) of the cage | basket | car 3 by the in-pit maintenance driving apparatus 10 or the cage | basket | car maintenance repair apparatus 16. FIG. During manual operation, the moving range of the car 3 is limited by the maintenance operation lower limit switch 18 and the maintenance operation upper limit switch 19.

FIG. 2 is a block diagram illustrating a safety control device of the elevator of FIG. 1. In order to ensure sufficient reliability of safety control, the safety control part 22 is redundant (here, redundant) and has the 1st and 2nd logic circuits 23a and 23b which perform the same process. The signals from the switches 6a, 6b, 6c, 11, 12, and 17 are input to both the first logic circuit 23a and the second logic circuit 23b, respectively. At this time, the input signals from the landing door switches 6a, 6b and 6c and the car gate switch 17 are also duplicated, and are compared with each other by the first logic circuit 23a and the second logic circuit 23b.

The logical circuits 23a and 23b take the logical product of the inputs from the three systems of the landing door switches 6a, 6b and 6c (connected in series), whereby the conventional landing door switch 6 A signal equivalent to the input of is obtained. By outputting this signal to another device such as the driving control unit 21 or the relay output, control similar to that of a conventional elevator (for example, control of door open travel prevention) can be performed.

The first and second logic circuits 23a and 23b perform safety control, take the logical product of the output result (valid / invalid of automatic operation), and output the result to the first and second relays 24a and 24b. . The first and second relays 24a and 24b are connected in series, and are input to the operation control unit 21 so that automatic operation becomes effective only when both the contacts are closed (on). That is, when either of the 1st and 2nd logic circuits 23a and 23b outputs the command which makes automatic operation invalid, the automatic operation of the cage | basket | car 3 is invalidated.

The output result is again input to the first and second logic circuits 23a and 23b to diagnose whether the result is outputted correctly. In addition, the first and second logic circuits 23a and 23b have a self-diagnosis function for checking their health. When abnormality is detected by the logic circuits 23a and 23b, the output which invalidates automatic operation of the cage | basket | car 3 is performed.

Each of the logic circuits 23a and 23b may be realized by a computer including software (a computer different from the computer of the operation control unit 21). Each computer has a central processing unit (CPU), ROM, RAM, and a watch dog timer (WDT). Then, the inspection regarding the reading and writing of the ROM and the RAM and the time monitoring by the WDT are performed.

Each of the logic circuits 23a and 23b includes a simple (electronic) circuit (logical circuit) using an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), a complex programmable logic decision (CPLD), a transistor, or the like. Or a relay circuit or the like.

The maintenance work device 25 includes a repair operation mode changeover switch 9 in a pit, a repair operation apparatus 10 in a pit, a repair operation mode changeover switch 15 in a car, and a repair operation apparatus 16 in a car. It is.

FIG. 3 is a flowchart showing safety control processing in the safety control unit 22 of FIG. 1. The safety control unit 22 repeatedly executes the process of FIG. 3 while the automatic operation is not invalidated (valid).

In the safety control process, first, the input signal is diagnosed (step S1), and if there is an error, automatic operation is invalidated (step S2). If there is no abnormality, the car gate switch 17 is determined (step S3). If the cage door 13 is in the fully closed state, the landing door switches 6a, 6b, and 6c are determined (step S4). If the landing door 5 of any system is in the open state, automatic operation is invalidated (step S2).

When the car door 13 is in the door open state, the landing door switches 6a, 6b, and 6c are judged (step S5), and the automatic operation is invalidated when the landing doors 5 of two or more systems are open. (Step S2).

In other cases than the above, that is, when all the landing doors 5 and the car doors 13 are in a closed state, and only one system landing door 5 is in the open state when the car doors 13 are open. Next, the calculation results of the duplicated logic circuits 23a and 23b are collated (step S6). If the calculation result is inconsistent, automatic operation is invalidated (step S2). If the calculation results match, the output signal is diagnosed (step S7). If the diagnosis result of the output signal is abnormal, automatic operation is invalidated (step S2). If the arithmetic results match and there is no abnormality in the signal, the process ends.

FIG. 4 is a flowchart showing a reset process of automatic operation in the safety control unit 22 of FIG. 1. The safety control unit 22 repeatedly executes the process of FIG. 4 when the invalidation of the automatic operation is maintained.

In the reset process, the input signal is first diagnosed (step S11), and if there is an error, automatic operation invalidation is maintained (step S12). If there is no abnormality, the reset signal input is determined (step S13). If no reset signal is input, automatic operation invalidation is maintained (step S12).

If the reset signal is input, the car gate switch 17 is determined (step S14). If the car door 13 is in the open state, automatic operation invalidation is maintained (step S12). If the cage door 13 is in the fully closed state, the landing door switches 6a, 6b, and 6c are determined (step S15). If the landing door 5 is open even at one place, automatic operation invalidation is maintained (step S12).

When all the landing doors 5 are in the fully closed state, the arithmetic result of the overlapping logic circuits 23a and 23b is collated (step S16). If the calculation result is inconsistent, automatic operation invalidation is maintained (step S12). If the calculation results match, the output signal is diagnosed (step S17). If the diagnosis result of the output signal is abnormal, automatic operation invalidation is maintained (step S12). If the calculation results coincide with each other and there is no abnormality in the signal, the automatic operation invalidation is canceled (automatic operation is validated) (step S18), and the control is switched to the safety control process shown in FIG.

In the safety control device of such an elevator, for example, the car 3 is running in order to perform maintenance work while the car 3 is running or stopped on a certain floor with the door closed or the door open. By detecting that the landing door 5 leading to the upper or pit 1a is opened and automatically canceling the automatic operation, the car 3 suddenly runs for the maintenance worker even when the maintenance worker forgets the automatic driving invalidation operation. It can be prevented surely, and it is possible to ensure the safety of a maintenance worker. Moreover, the movement to the hoistway 1 of a maintenance worker can be detected at low cost by using the equipment provided in the elevator efficiently.

Embodiment 2 Fig.

5 is a block diagram which shows the machine roomless elevator by Embodiment 2 of this invention. In Embodiment 2, when the floor is set for the maintenance worker to climb on the cage | basket | car 3 (for example, when the disengagement apparatus for opening the landing door 5 from the landing side is provided only in the specific floor), It demonstrates. In this case, the landing door switch 6 can be divided into three systems: the lowest floor landing door switch 6a, the specific floor landing door switch 6d, and the non-specific floor landing door switch 6e provided on the other floor.

Safety control logic 1.

The safety control unit 22 monitors the state of the car gate switch 17 and the three landing door switches 6a, 6d, and 6e so that the car gate switch 17 is on, that is, the car door 13 ) Is in the fully closed state, when any landing door switch 6a, 6d, 6e is turned off, that is, when any landing door 5 is detected to be open, the automatic operation is invalidated.

Safety control logic 2.

When the car gate switch 17 is off, that is, when the car door 13 is open, the safety control unit 22 turns off two or more of the landing door switches 6a, 6d, and 6e. That is, when it detects that the landing door 5 of two or more systems opened the door, automatic operation is invalidated. The other configuration is the same as that of the first embodiment.

Even with such a structure, the movement to the hoistway 1 of a maintenance worker can be detected at low cost by using the apparatus existing in the elevator efficiently.

In addition, in Embodiment 1, 2, although the lowest floor landing door switch 6a was made into an independent system, when a maintenance worker does not open the landing board door 5 of the lowest floor and does not move into the pit 1a, It is not necessary to make the landing door switch 6 into an independent system.

In the first and second embodiments, the landing door switch 6 is divided into three systems, but may be divided into four or more systems.

Embodiment 3.

6 is a block diagram which shows the machine roomless type elevator which concerns on Embodiment 3 of this invention. In this example, the landing door switch 6 is divided into the system of the number of floors and the number of floors so that the opening / closing state of the landing door 5 of every floor can be detected individually. That is, the signals of all the landing door switches 6 are input to the elevator control apparatus 4 as independent systems, respectively.

Safety control logic 1.

The safety control unit 22 monitors the state of the car gate switch 17 and the landing door switch 6 of the entire system, so that when the car gate switch 17 is on, that is, the car door 13 is completely closed. In the state, when the landing door switch 6 is turned off, that is, when it detects that the landing door 5 is opened, automatic operation is invalidated.

Safety control logic 2.

The safety control unit 22 is used when two or more of the landing door switches 6 are turned off when the car gate switch 17 is turned off, that is, when the car door 13 is open. When it detects that the landing door 5 mentioned above opened the door, automatic operation is invalidated. The other configuration is the same as that of the first embodiment.

Even with such a structure, the movement to the hoistway 1 of a maintenance worker can be detected at low cost by using the apparatus existing in the elevator efficiently.

In addition, in Embodiments 1-3, when the movement of the maintenance worker to the hoistway 1 is detected, the automatic operation of the cage | basket | car 3 is invalidated, Even if the operation mode of the operation control part 21 is switched to the manual operation mode. do. Moreover, when detecting the movement of the maintenance worker to the hoistway 1, you may make it cut off the safety circuit of an elevator (not shown). In this case, since the energization to the hoisting motor and the hoisting brake is interrupted, the car 3 can be stopped without going through the operation control unit 21.

In addition, in Embodiments 1-3, although the connection from the various switches to the safety control part 22 was performed by wire, you may perform wirelessly.

In addition, although the reset switches 11 and 12 are provided only in the hoistway 1 in Embodiment 1-3, you may provide in the hoistway 1.

In addition, in Embodiments 1-3, although the hoisting machine 2 and the elevator control apparatus 4 are arrange | positioned in the lower part in the hoistway 1, it is not limited to this layout, These, for example, in the hoistway 1 This invention is applicable also to the elevator arrange | positioned at the upper part.

Moreover, although Embodiment 1-3 showed the machine roomless type elevator, if the elevator performs maintenance work in a hoistway, this invention can be applied to all types of elevators. For example, the present invention can also be applied to an elevator having a machine room, a double deck elevator, a ropeless elevator, a linear motor elevator, a hydraulic elevator, and the like.

Claims (11)

Car gate switch to detect opening of car door,
A plurality of landing door switches for detecting opening of the plurality of landing doors, and
A safety control section for performing safety control based on information input from the car gate switch and the landing door switch;
The landing door switch is divided into a plurality of systems,
The safety control unit can recognize the opening of the landing door independently for each system of the landing door switch, and when the car gate switch indicates the door closed state, the landing door switch of a certain system indicates the door opening state. When the door is opened, and when the car gate switch indicates the door open state, when the landing door switch of two or more systems shows the door open state, the elevator detects the movement of the maintenance worker to the hoistway. Safety control device. The method according to claim 1,
The system of the landing door switch includes two systems for detecting the opening of the landing door alternately on each floor. The method according to claim 1,
The system of the landing door switch comprises a system for detecting the opening of the landing door of the lowest floor, and two systems of three systems for detecting the opening of the landing door alternately on each floor except for the lowest floor. The method according to claim 1,
The system of the landing door switch is an elevator including a system for detecting the opening of the landing door of a specific floor which is opened when a maintenance worker enters the hoistway, and a system for detecting the opening of the landing door of another floor. Safety control device. The method according to any one of claims 1 to 4,
The landing door switch is an elevator safety control device connected in series for each system. The method according to claim 1,
The landing door switch is an elevator safety control device that is divided into a system of the number of floors and the number of floors so as to individually detect the opening of the landing doors of all floors. The method according to any one of claims 1 to 6,
The safety control device of the elevator that invalidates the automatic operation of the car when the safety control unit detects the movement of the maintenance personnel to the hoistway. The method of claim 7,
When the automatic control of the car is invalidated, the safety control unit operates a reset switch, and the safety control device of the elevator continues to invalidate the automatic operation until all the landing doors and the car doors are completely closed. . The method according to any one of claims 1 to 6,
The safety control device of the elevator to switch the operation mode of the car to the manual operation mode when the safety control unit detects the movement of the elevator to the hoistway. The method according to any one of claims 1 to 6,
The safety control unit of the elevator, when detecting the movement of the maintenance personnel to the hoistway, the safety control device of the elevator to cut off the power supply to the hoist and / or brake for lifting the car by breaking the safety circuit. The method according to any one of claims 1 to 10,
The safety control device of an elevator which has a plurality of logic circuits which perform the same processing and is overlapped.

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