JP2013071217A - Entrance and exit management system for dangerous area - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an entrance and exit management system for a dangerous area capable of securing the safety of workers.SOLUTION: There is provided an entrance and exit management system 10 including gates G1 to G8 provided in a boundary between dangerous areas H1, H2 and safety areas S1 to S3 and a controller 17. The controller 17 includes ID tag readers 29, 30 and a display means 31 which are provided in the gates G1 to G8, an entrance permission or refusal output means 35 provided in an operating room 22a to indicate permission and refusal for entering the dangerous areas H1, H2, and an ID input means 34, and a gate control means 33. The entrance to the dangerous areas H1, H2 enabled by opening the gates G1 to G8 is permitted under conditions of the checking IDs of workers, the generation entrance permission signals to the dangerous areas H1, H2 by means of the entrance permission or refusal output means 35, and stopping vehicles 12 to 16 while the exit therefrom is permitted by a requirement of the checking of the IDs of the workers. The number of workers actually present in the dangerous areas H1, H2 is calculated from the number of entered and exited workers to and from the dangerous areas H1, H2 by means of the gates G1 to G8. If a worker is present in the dangerous areas H1, H2, the vehicles 12 to 16 are made to stop traveling.

Description

The present invention relates to an entry / exit management system for a dangerous area for ensuring the safety of an operator who enters the dangerous area where a vehicle travels.

For example, in a steelworks, coal is charged into a plurality of coke ovens (carbonization chambers) arranged in parallel with coke oven facilities, and the coal is dry-distilled with heat from a heat storage chamber to produce coke. Yes. The produced coke is extruded from the inside of the coke oven to the outside by an extruder that moves between the coke ovens on the coke extrusion side, and is installed in the fire extinguisher via a guide car that moves between the coke ovens on the coke exit side. After entering, it is cooled and supplied to the blast furnace.
As described above, in the coke oven equipment, there is a dangerous area where the extruder and the guide vehicle travel. In this dangerous area, the worker works (for example, getting on and off the extruder and the guide car, repairing the coke oven) And cleaning work, etc.), and it was necessary to ensure safety.
On the other hand, for example, Patent Document 1 proposes a monitoring system that monitors the entry / exit of a monitored person registered in advance in a specific area where monitoring gates are provided at a plurality of locations.
Further, Patent Document 2 proposes a management system at an entrance that permits entry and exit only for those who have specific authority.

JP 2007-7841 A JP 2006-236183 A

However, the conventional technique still has the following problems to be solved.
The technology of Patent Document 1 manages entry / exit of a monitored person in a specific area by detecting a self-other identification signal including ID information transmitted from a wireless transmitter such as an IC tag. For this reason, as described above, when a vehicle (extruder or guide vehicle) travels in a dangerous area, for example, when the vehicle is in a traveling state, or when the vehicle starts to travel soon, the worker is in danger. There is a risk of entering the area, which is dangerous.
In addition, since the monitoring gate has a pair of gate doors that are opened and closed in conjunction with each other, it is necessary to secure an installation space for the pair of gate doors. As the number of gate doors increases, the number of installed gate doors increases, which is uneconomical due to equipment costs.

The technique of Patent Document 2 includes a camera that captures a predetermined range around an entrance / exit, detects a person from image information of the camera, and determines whether to pass. For this reason, similarly to the above-described Patent Document 1, when a vehicle travels in a dangerous area, there is a risk that an operator may enter the dangerous area, which is dangerous.
Moreover, since it is necessary to provide cameras at all entrances / exits, the number of cameras installed increases with the increase in the number of entrances / exits, which is uneconomical due to equipment costs. In addition, since the image information of the camera needs to be processed by the image processing means, the equipment cost is further increased.
Furthermore, depending on the installation environment of the camera, dirt or the like may be attached to the lens of the camera, so that the camera must be frequently cleaned and the workability is poor.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide an entrance / exit management system for a dangerous area that can ensure the safety of an operator.

The dangerous area entrance / exit management system according to the present invention that meets the above object includes a dangerous area in which one or more vehicles travel on a track, a plurality of safety areas provided outside the dangerous area, and the dangerous area. And a dangerous area entrance / exit management system having a gate provided at each of the boundaries of the plurality of safety areas, and a control device that manages equipment including the gates,
The control device is provided at or near the gate, an ID tag reader for identifying IDs of visitors to and from the danger area, and display means provided at or near the gate. When,
Provided in the driver's cab of the vehicle, an entrance / exit output means for instructing permission and refusal to enter the dangerous area from the driver's cab, input means for registering an operator's ID in advance, and opening / closing operation of the gate Gate control means,
The entrance of the worker to the dangerous area by opening the gate by the gate control means is as follows. 1) The ID of the worker identified by the ID tag reader is registered in advance by the input means by the gate control means. 2) The entrance / exit output means generates a signal for allowing the operator to enter the dangerous area to the gate control means, and 3) the vehicle is stopped. Of the transmission of a signal to the gate control means, it is performed by satisfying the condition of 1) and either or both of 2) or 3),
The worker's exit from the dangerous area due to the gate opening by the gate control means is the ID of the worker identified by the ID tag reader registered in advance by the input means by the gate control means. On the condition that it is recognized,
The gate control means calculates the number of workers actually present in the dangerous area from the number of workers entering the dangerous area by the gate and the number of workers leaving the dangerous area. When the worker is present in the danger area, the vehicle is stopped.

In the entrance / exit management system for a dangerous area according to the present invention, the display means includes: a) the vehicle is moving, b) the worker's ID is being identified, and c) the gate. It is preferable to display that it is possible to enter the danger zone through.
Moreover, in the entrance / exit management system to the dangerous area according to the present invention, it is preferable that the gate is provided with an emergency switch that opens the gate without identification of the operator's ID.
And in the entrance / exit management system to the dangerous area which concerns on this invention, the material carrying gate wider than this gate may be provided in the boundary of the said dangerous area and the said safe area separately from the said gate.

In the entrance / exit management system for a hazardous area according to the present invention, the dangerous area and the safety area are set in a coke oven facility including a plurality of coke ovens, and the vehicle is provided on a coke extrusion side of the coke oven. It is preferable that the extruder and the guide wheel provided on the coke outlet side of the coke oven.
Moreover, the entrance / exit management system to the dangerous area which concerns on this invention WHEREIN: The said safe area can also be provided in the said extruder and the said guide vehicle.
In the hazardous area entry / exit management system according to the present invention, the coke oven facility is divided into a plurality of furnace groups each having a plurality of coke furnaces, and the dangerous area is set in a specific furnace group. At that time, the other furnace groups can be released from the danger zone.
Furthermore, in the entrance / exit management system for a dangerous area according to the present invention, the setting of the dangerous area for the specific furnace group may be performed by a mechanical stopper that can be opened and closed.

In the hazardous area entry / exit management system according to the present invention, the control device includes an ID tag reader and display means provided at or near the gate, an entrance / exit output means provided in the cab of the vehicle, and an ID input means. And gate control means, and in addition to the worker's ID recognition, the admission condition for the worker to enter the danger area by the admission right / out means is generated as the entry condition to the danger area of the worker by opening the gate. Or one or both of stopping the vehicle. For this reason, it is possible to determine whether the worker enters the hazardous area taking into account the traveling state of the vehicle, for example, when the vehicle is in a traveling state or when the vehicle will start traveling soon.
In addition, since there are two or more conditions for entering the worker's hazardous area by opening the gate, it is possible to strictly enter the worker's dangerous area, while the conditions for leaving the worker's dangerous area are as follows. Therefore, the worker can leave the danger area smoothly. By changing the number of entry and exit conditions, the configuration of the entrance / exit management system for the dangerous area can be simplified.
When the number of workers who entered the danger area by the gate and the number of workers who left the danger area are calculated, the number of workers actually present in the danger area is calculated. Since the traveling of the vehicle is stopped, for example, it is possible to prevent the vehicle from traveling after the worker enters the danger area where the vehicle is stopped.
From the above, by using the entrance / exit management system for the hazardous area according to the present invention, it is possible to ensure the safety of the worker who enters the dangerous area, and the system configuration can be simplified and economical.

In addition, when the display means displays each status of a) the vehicle is moving, b) the worker's ID is being identified, and c) entry into the dangerous area through the gate, the worker The situation can be easily confirmed and further safety can be ensured.
And when the emergency switch which opens a gate without the identification of an operator's ID is provided in the gate, for example, even if an operator loses ID in a danger area, he can leave a danger area. Thereby, the safety of the worker in an emergency can be ensured reliably.
Furthermore, when a material carrying gate wider than the gate is provided at the boundary between the hazardous area and the safety area, for example, an operator carrying a tool can move from the safety area to the hazardous area without passing through the narrow gate. Also, you can easily move from the hazardous area to the safe area.

Here, when the entrance / exit management system to the hazardous area is applied to a coke oven facility having a plurality of coke ovens, the safety of workers entering the hazardous area can be ensured also in the coke oven facility.
When the safety area is also provided in the extruder and in the guide car, for example, an operator who gets off the extruder (or the guide car) and enters the dangerous area may enter another extruder (or other guide) that is running. Car) eliminates the danger of being at risk.

When a coke oven facility is separated into multiple furnace groups and a dangerous area is set for a specific furnace group, when other furnace groups are released from the dangerous area, for example, the risk corresponding to the operating status of each furnace group Setting of the area, that is, the dangerous area can be set in the operating furnace group, and the anti-operation (non-operating) furnace group can be released from the dangerous area (set in the safe area). The movement limit of workers can be minimized.
Furthermore, when setting a hazardous area to a specific furnace group with a mechanical stopper, it is possible to divide the dangerous area from the safe area with a simple configuration.

It is a top view of the coke oven equipment which installed the entrance / exit management system to the dangerous area which concerns on one embodiment of this invention. It is explanatory drawing which shows the outline of a structure of the entrance / exit management system to the dangerous area. It is explanatory drawing which shows the usage method of the entrance / exit management system to the dangerous area. It is a flowchart which shows operation | movement of the entrance / exit management system to the dangerous area.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIGS. 1 to 3, an entrance / exit management system (hereinafter also simply referred to as an entrance / exit management system) 10 for a hazardous area according to an embodiment of the present invention includes a plurality of coke ovens (coking chambers). Danger areas H1 and H2 that are provided in the coke oven equipment 11 provided, the extruders (examples of vehicles) 12 and 13, and guide cars (examples of vehicles) 14 to 16 run on tracks (not shown), A plurality of safety areas S1 to S3 provided outside the dangerous areas H1 and H2, and gates G1 to G8 and gates G1 to G8 provided respectively at the boundaries of the dangerous areas H1 and H2 and the plurality of safety areas S1 to S3. And a control device 17 that performs management of the included devices. This will be described in detail below.

The coke oven facility 11 is separated into a plurality of furnace groups 18 and 19 each having a plurality of coke ovens, and each of the furnace groups 18 and 19 includes a coke oven in the running direction of the extruders 12 and 13 and the guide wheels 14 to 16. And heat storage chambers are arranged next to each other alternately. In addition, although the number of furnace groups is two here, it is not limited to this, One may be sufficient and three or more may be sufficient.
On the coke extrusion side (front side) of a plurality of coke ovens arranged side by side, the above-described extruders 12 and 13 capable of traveling on a track laid in a direction orthogonal to the coke extrusion direction are provided. An inspection vehicle (an example of a vehicle) 20 for maintenance inspection is also provided on the track on which the extruders 12 and 13 travel so as to be able to travel.

On the other hand, on the coke exit side (rear side) of the coke oven, the above-described guide wheels 14 to 16 that can run on a track laid in a direction orthogonal to the coke extrusion direction are provided. Further, on the outside of the track on which the guide wheels 14-16 travel (on the side opposite to the furnace groups 18, 19), another track is provided, and the fire extinguisher receives coke falling through the guide wheels 14-16. 21 and 22 are provided so that driving | running | working is possible.
In addition, the number of the above-described extruders, inspection vehicles, guide vehicles, and fire extinguishing vehicles is not limited to this, and may be one each, or may be two or more.

Above the furnace groups 18 and 19, a coal charging vehicle (not shown) for moving to the upper position of the coke oven to be charged with coke and charging the coal from above is disposed. Yes. The supply of coal to the coal charging vehicle is performed from a coal tower installed between the two furnace groups 18 and 19.
Operations of the coke oven equipment 11 shown above, for example, operation and monitoring of the extruders 12 and 13, guide cars 14 to 16, the inspection vehicle 20, the fire extinguishing vehicles 21 and 22, and the coal charging vehicle are provided separately. The operation is performed by remote control from a driver's cab (vehicle driver's cab, which is a central monitoring room) 22a, for example, using a monitor.

When operating the coke oven facility 11, first, the coal charging vehicle is moved to the coal tower and stopped, and the coal in the coal tower is supplied to the coal charging vehicle. Next, the coal charging vehicle is moved to a position above the coke oven in which the coal is charged, and after the coal in the coal charging vehicle is charged into the coke oven, the coal is heated by heat from the heat storage chamber. Coke is produced by dry distillation. The produced coke is removed from the coke oven by the extruder 12 (or the extruder 13) moved to the front of the coke oven, and then extruded from the coke oven to the coke outlet side (rear) and the rear of the coke oven. After being inserted into the fire-extinguishing vehicles 21 and 22 via the guide wheel 14 (or the guide wheels 15 and 16) that has moved to the position, it is cooled and supplied to a blast furnace (not shown).

Thus, in the coke oven equipment 11, the extruders 12 and 13 are moving in front of the coke oven, and the guide wheels 14 to 16 are moving behind. For this reason, when an operator performs work in the coke oven equipment 11, for example, when the extruders 12 and 13 and the guide wheels 14 to 16 get on and off, repair work and cleaning work of the coke oven, etc., the operator There is a risk of contact with 12, 13 and the guide wheels 14-16.
Further, since the inspection vehicle 20 moves in the same manner as the extruders 12 and 13 in front of the coke oven, for example, when performing repair work or cleaning work of the coke oven, the operator contacts the inspection vehicle 20. There is a fear. Further, behind the coke oven, for example, when an operator gets on and off the fire extinguishing vehicles 21 and 22, there is a possibility that they contact the guide vehicles 14 to 16.

Therefore, first, in the moving range of the extruders 12 and 13, that is, in front of the coke oven, the dangerous area H1 (the hatched portion on the right in FIG. 1) and in the moving range of the guide wheels 14 to 16, that is, behind the coke oven. , Dangerous areas H2 (upward left slanted lines in FIG. 1) are respectively set. Accordingly, the safety zone S1 is located outside the dangerous zones H1 and H2, that is, one side of the furnace group 18 (left side in FIG. 1), and the safety area S2 is located between the furnace group 18 and the furnace group 19 (below the coal tower). A safety zone S3 can be set on the other side of the furnace group 19 (right side in FIG. 1). In addition, partition fences (partition walls) 23 to 28 are provided at the boundaries between the dangerous areas H1 and H2 and the safety areas S1 to S3, respectively.
Further, the inside of the extruders 12 and 13, the guide cars 14 to 16, the inside of the inspection vehicle 20 and the fire extinguishing cars 21 and 22 are also outside the dangerous areas H1 and H2, and therefore can be set as safe areas.

Here, the gates G1 and G2 are provided on the left and right sides of the rear side of the furnace group 18, that is, on the right and left sides of the front side of the furnace group 18, that is, the partition fences 23 and 24 at the boundary between the dangerous area H1 and the safety areas S1 and S2. Gates G3 and G4 are respectively provided in the partition fences 25 and 26 at the boundary between the dangerous area H2 and the safety areas S1 and S2. Further, gates G5 and G6 are provided on the left and right sides on the front side of the other furnace group 19, that is, the partition fences 24 and 27 at the boundary between the dangerous area H1 and the safety areas S2 and S3. Gates G7 and G8 are provided on the partition fences 26 and 28 on both sides, that is, the boundary between the dangerous area H2 and the safety areas S2 and S3.
The gates G <b> 1 to G <b> 8 are not particularly limited as long as the workers can pass one by one, but for example, a tripod type gate can be used.
Thereby, the worker can move from the safety areas S1 to S3 to the dangerous areas H1 and H2 and move from the dangerous areas H1 and H2 to the safety areas S1 to S3 through the gates G1 to G8.

In addition to the gates G1 to G8, the gates G1 to G8 are provided between the gates G2 and G5 and between the gates G4 and G7 at the boundary between the dangerous areas H1 and H2 and the safety area S2. Wide material carrying gates G9 and G10 are provided. Note that the material carry-in gates G9 and G10 do not need to be installed if not necessary, and the number of installed materials can be set to one or more as necessary.
The material carry-in gates G9 and G10 are not particularly limited as long as the worker can carry the material into the safe area S2 and can carry out the material from the safe area S2. For example, the safe area S2 On the side, a gate that can be opened and closed within the range of 0 or exceeding 0 and 90 degrees (and 180 degrees) can be used.
Thereby, the worker can smoothly carry the material via the material carry-in gates G9 and G10.

In addition, gates G11 to G22 are provided at boundaries between the dangerous areas H1 and H2 and other safety areas, that is, at the gates on both sides of the extruders 12 and 13, the guide cars 14 to 16, and the inspection vehicle 20, respectively. Yes. As for the fire extinguishing vehicles 21 and 22, gates G23 and G24 are respectively provided at the entrances and exits of the fire extinguishing vehicles 21 and 22 that are the boundary between the dangerous area H2 and the safety area.
As the gates G11 to G22, for example, gates having the same configuration as the above-described gates G1 to G8 can be used, and for the gates G23 and G24, for example, from the position of 90 degrees to the dangerous area H2 side, A door that can be opened and closed up to a range of 90 degrees can be used, but is not limited thereto.
Thereby, the worker can move from each vehicle to the dangerous areas H1, H2 and move from the dangerous areas H1, H2 to each vehicle via the gates G11 to G24.

Furthermore, one dangerous zone H1 is provided with a furnace compartment partition fence (an example of a mechanical stopper) G25 to G28, and the other dangerous zone H2 is provided with a furnace compartment partition fence (an example of a mechanical stopper) G29 to G32. It has been.
The furnace compartment partition fences G25 and G26 on the dangerous zone H1 side are disposed on both sides of the furnace cluster 18 which is the moving direction of the extruders 12 and 13 and the inspection vehicle 20, and the furnace compartment partition fences G29 and G30 on the dangerous zone H2 side are provided. The guide wheels 14 to 16 are installed on both sides of the furnace group 18 in the moving direction so as to be openable and closable. Further, the other furnace group partitioning fences G27, G28, G31, and G32 are also installed on both sides of the furnace group 19 so as to be openable and closable similarly to the above-described furnace group 18.

In addition, the furnace group partition fences G26 and G27 located between the furnace group 18 and the furnace group 19 are respectively between the gates G2 and G5 and the material carry-in gate G9, and the furnace group partition fences G30 and G31 are each a gate G4. , G7 and the material carry-in gate G10. As a result, the movement from the safety area S2 to the danger areas H1, H2 and the movement from the danger areas H1, H2 to the safety area S2 can be performed without opening or closing the furnace partition partitions G26, G27, G30, G31. , G4, G5, G7, or material carry-in gates G9, G10.
By opening and closing the above-described furnace partition partitions G25 to G32, the movement ranges of the extruders 12 and 13, the guide cars 14 to 16 and the inspection vehicle 20 can be limited to, for example, the furnace group 18 or the furnace group 19. Therefore, when setting a dangerous area for a specific furnace group, the other furnace groups can be released from the dangerous area (set as a safe area) by opening and closing the furnace partition partitions G25 to G32.

As shown in FIG. 2, each of the gates G1 to G8 and G11 to G24 is provided with ID tag readers 29 and 30, a display lamp (an example of display means) 31, and a passage recognition sensor 32, respectively. .
The ID tag readers 29 and 30 identify the ID information (personal information) of the worker built in the ID tag by holding the ID tag possessed by each worker. The ID tag readers 29 and 30 are provided on the entrance side and the exit side of the gates G1 to G8 and G11 to G24, respectively, so that visitors to the danger areas H1 and H2 and exit from the danger areas H1 and H2 are provided. ID information (personal information) can be identified.
Accordingly, the ID tag readers 29 and 30 can be installed in the vicinity of the gates G1 to G8 and G11 to G24 as long as the ID tag readers 29 and 30 can be placed over each other.

The display lamp 31 displays the current work safety status. The display lamp 31 is, for example, an indicator colored in three colors (red, yellow, and blue), a) the vehicle is moving (red), and b) the worker ID is being identified. (Yellow) and c) that it is possible to enter the danger zone through the gate (blue). Note that the display type of the display lamp is not limited to this, and the display lamp is installed in the vicinity of each of the gates G1 to G8 and G11 to G24 as long as the display lamp is installed at a position that can be confirmed by the operator. You can also
The passage recognition sensor 32 is a sensor that detects that the worker has passed through the gates G1 to G8 and G11 to G24. For example, an optical sensor that detects the passage of the worker by blocking the light beam, or the like. Can be used. In addition, when a tripod type gate is used for each of the gates G1 to G8 and G11 to G24, the passage of the operator can be recognized by detecting that the bar of each gate has rotated 120 degrees with a limit switch. . Therefore, in this case, the limit switch becomes a passage recognition sensor.

Each of the gates G1 to G8 and G11 to G24 is preferably provided with communication means (not shown) such as a telephone or an interphone. This contact means is configured to be able to communicate with the manager of the cab 22a of the vehicle described above. For example, an operator who enters the dangerous areas H1 and H2 can notify the manager that he / she wants to enter before entering. The contact means does not necessarily need to make a call, and may be a contact button or the like. Further, the communication means can be installed in the vicinity of each of the gates G1 to G8 and G11 to G24 as long as it is installed at a position where the operator can use it.
And each gate G1-G8 which divides danger zone H1, H2 and safety zone S1-S3 is provided with the emergency switch which opens gate G1-G8, without identification of an operator's ID information. Is preferred. Thereby, for example, even if the worker loses the ID in the dangerous areas H1 and H2, the worker can leave the dangerous areas H1 and H2 to the safety areas S1 to S3.

A computer (an example of a gate control means) 33 is provided in the cab 22a. For example, the computer 33 can perform the following operations.
・ Registration (memory storage) of worker ID information
・ Signal input from ID tag readers 29 and 30 and verification with registration information ・ Signal output to display lamp 31 ・ Signal input from passage recognition sensor 32 ・ Gates G1 to G8, material carry-in gates G9 and G10, gates G11 to G11 Opening / closing operation of G24 and furnace group partition fences G25 to G32, signal input of vehicle operation information (movement, stop, position information) and signal output of vehicle operation

Also, the operator's ID information input means (for example, a keyboard) 34 operated by the administrator, and a switch (admission right / outward output means for instructing entry permission / rejection of the dangerous areas H1, H2) are provided in the cab 22a. An example) 35 is provided.
The administrator inputs the worker ID information using the input means 34, and the worker ID information is registered in the computer 33. In addition, when the administrator operates the switch 35, it is possible to output to the computer 33 signals for permitting entrance and rejecting the entrance to the dangerous areas H <b> 1 and H <b> 2.
The ID tag readers 29 and 30, the display lamp 31, the passage recognition sensor 32, the computer 33, the input unit 34, the switch 35 (further, the communication unit and the emergency switch) and the like described above constitute the control device 17.

Next, the operation of the entrance / exit management system 10 to the dangerous area according to the embodiment of the present invention will be described.
First, FIG. 1 shows a case where an operator enters the dangerous area H1 (same as the dangerous area H2) through the gate G1 (same as G2 to G8) from the safe area S1 (same as the safety areas S2 and S3). This will be described with reference to FIG.
With the entrance / exit management system 10 to the dangerous area activated, the worker in the safety area S1 approaches the gate G1 to enter and confirms the lighting state of the display lamp 31. At this time, if the extruder 12 is running, the red of the display lamp 31 is lit, so that the operator cannot enter the danger zone H1. On the other hand, if the extruder 12 is stopped, since the red color is not lit, the first condition that allows the operator to enter the hazardous area H1 is satisfied. The red lighting of the display lamp 31 is displayed when an output signal (running signal or stop signal) of operation information of the extruder 12 is input to the computer 33 (step 1 (ST1)).

Next, the operator notifies the manager of the cab 22a that he / she wants to enter the danger zone H1 by means of a contact means provided at the gate G1. When the operator operates the contact means, the manager displays the position (or name) of the gate G1 to which the worker intends to enter using a display device (for example, a monitor).
At this time, based on the operating state of the extruder 12 in the hazardous area H1, for example, when the extruder 12 is about to move, the manager notifies the operator that entry is not permitted by the above-mentioned contact means, while the extruder 12 If the machine 12 is not in a situation to move, this contact means informs the operator of the admission permission. Note that the contact button or the like described above, which does not require a direct call between the operator and the manager, can also be used as the contact means.

Here, when the manager notifies the worker of the entry permission by the contact means, the manager operates the switch 35 and outputs a signal for the entry permission to the dangerous area H <b> 1 to the computer 33. As a result, the second condition that allows the worker to enter the danger zone H1 is established. When the manager notifies the operator of the entry permission by the contact means, the manager operates the switch 35 and outputs a signal for refusing entry to the dangerous area H1 to the computer 33.
Further, when the operator uses the above-described contact button, an output signal of the contact button is input to the computer 33, and the administrator confirms this. As a result, the manager operates the switch 35 to output a signal for permitting entry to the dangerous area H1 or a signal for refusing to enter the dangerous area H1 to the computer 33. In addition, the signal of admission permission and admission refusal is output to the display lamp 31 provided in the gate G1, for example, and an operator can confirm (step 2 (ST2)).

As described above, the worker who has been notified of the admission permission from the administrator by the contact means (when the admission permission signal to the dangerous area H1 is transmitted to the computer 33 by the operation of the switch 35 by the administrator) The ID tag possessed is held over the entrance ID tag reader 29 provided at the gate G1. Thus, the computer 33 collates the ID information of the ID tag with the ID information registered in advance. At this time, the computer 33 lights the display lamp 31 in yellow to indicate that the worker ID is being identified.
Here, when the ID information of the ID tag does not exist in the registered ID information, the closed state of the gate G1 is maintained by the computer 33, so that the worker cannot enter the danger zone H1. On the other hand, if the ID information of the ID tag matches the registered ID information, the third condition that allows the operator to enter the dangerous area H1 is established (step 3 (ST3)).

As described above, when the above three conditions, that is, the three conditions for entering (hereinafter referred to as the admission condition) are established, the computer 33 lights the display lamp 31 in blue, and the operator passes through the gate G1. It is displayed that it is possible to enter the dangerous area H1 (step 4 (ST4)). Then, the gate G1 is opened by the computer 33, and the operator can enter the danger zone H1 through the gate G1 (step 5 (ST5)). The gate G1 is locked (locked) by the computer 33 after the passage recognition sensor 32 detects that the operator has passed the gate G1.
On the other hand, when an operator in the dangerous area H1 is going to leave the safe area S1, the ID tag reader for exit provided in the gate G1 approaches the gate G1 to leave and has an ID tag possessed by the worker. Just hold it over 30. The ID of the worker identified by the ID tag reader 30 is recognized by the computer 33 as an ID registered in advance. With this one condition, that is, only one condition for exiting (hereinafter referred to as an exit condition), the gate G1 is opened by the computer 33, and the worker can exit into the safety area S1 through the gate G1. Also in this case, the gate G1 is locked by the computer 33 after the passage recognition sensor 32 detects that the operator has passed the gate G1.

Since the above entry / exit of the worker in the dangerous area H1 is also performed in the other gates G2, G5, and G6, it is difficult to grasp the number of workers actually present in the dangerous area H1.
Therefore, when the worker enters the dangerous area H1, the passage recognition sensor 32 detects when the worker passes through the gates G1, G2, G5, and G6, and the number of persons that the computer 33 exists in the dangerous area H1 is detected. Count up (add) and store. On the other hand, when the worker leaves the dangerous area H1, the passage recognition sensor 32 detects when the worker passes through the gates G1, G2, G5, and G6, and the number of people that the computer 33 exists in the dangerous area H1. Count down (subtract) and store. Thereby, the number of workers actually present in the dangerous area H1 can be calculated by the computer 33 from the number of workers entering the dangerous area H1 and the number of workers leaving the dangerous area H1.
As described above, when the worker is present in the hazardous area H1 (when the number of calculations is 1 or more), the computer 33 prevents the extruders 12 and 13 from traveling (prohibition of traveling) in order to ensure the safety of the worker. ).

In addition, the above-described method can be similarly applied to getting on and off of each vehicle, that is, the extruders 12 and 13, the guide vehicles 14 to 16, the inspection vehicle 20, and the fire extinguishing vehicles 21 and 22.
Specifically, when the worker gets off each vehicle, that is, when the worker moves from the safety zone in each vehicle to the dangerous zones H1 and H2 through the gates G11 to G24, the above entrance condition is satisfied. is necessary. On the other hand, when the operator gets into each vehicle, that is, when moving into each vehicle from the dangerous areas H1 and H2 through the gates G11 to G24, the above exit condition needs to be satisfied.
Further, similarly to the above-described method, when the worker moves from the inside of each vehicle to the dangerous area H1, the computer 33 counts up and stores the number of persons existing in the dangerous area H1, and the worker stores the dangerous area H1. When moving into each vehicle, the computer 33 counts down and stores the number of people present in the dangerous area H1. Thereby, the presence or absence of the worker who actually exists in the danger zone H1 can be reliably grasped.

Next, the case where a dangerous area is set up using the furnace group partition fences G25-G32 is demonstrated. In addition, although the danger zone H1 side is demonstrated here, it is the same also about the danger zone H2 side.
When each furnace group 18 and 19 is in an operational state (a state in which coal is charged or coke is extruded), a computer is used so that the extruders 12 and 13 can move over the entire furnace groups 18 and 19. 33, each furnace group partition fence G25-G28 is made into an open state (the state moved to the position shown by the arrow from the position shown in FIG. 1). At this time, the entry / exit of the worker to / from the dangerous area H1 is performed by the same method as described above.
However, when the operation of one of the furnace groups 18 and 19 is stopped, for example, when the operation of one furnace group 18 is performed and the operation of the other furnace group 19 is stopped, the computer 33 causes the furnace group 18 to be stopped. The furnace group partition fence G26 on the side is closed (the state shown in FIG. 1).

In this way, by closing the furnace group partition fence G26 on the furnace group 18 side, this output signal is input to the computer 33, and the computer 33 uses the dangerous area H1 as the boundary and the furnace group partition fence G26 as a boundary. Divide into two areas. Then, the computer 33 identifies the region where the extruder 12 exists based on the travel position output signal of the extruder 12 (or the extruder 13), and sets the region where the extruder 12 exists, that is, the furnace group 18 side as a dangerous area. On the other hand, the area where the extruder 12 does not exist, that is, the furnace group 19 side is set as a safety area.
As a result, the furnace group 19 side is in a state in which the extruder 13 is stopped or does not exist. Therefore, the computer 33 cancels the furnace group 19 from the dangerous area without changing the dangerous area set in the furnace group 18, and is in a safe area. Set to.

In this way, by setting the dangerous area on the furnace group 18 side, when the worker moves from the safety area S1, S2 to the dangerous area H1, the entrance condition is satisfied when passing through the gates G1, G2. Is required. Further, when the worker moves from the danger area H1 to the safety areas S1 and S2, the exit condition needs to be satisfied when passing through the gates G1 and G2.
On the other hand, since all of the furnace group 19 is a safe area (the dangerous area is released), when the worker passes through the gates G5 and G6, one condition (an operator's ID recognition) is an exit condition. ) Only need to be established.
In this way, the computer 33 identifies the gates that can enter the dangerous area and the gates that can enter the safe area, thereby minimizing the management of entrance and exit to the dangerous area and the movement restrictions of workers. it can.

Finally, when an operator enters the dangerous area H1 (same for the dangerous area H2) from the safe area S1 (same for the safety areas S2 and S3) through the material carry-in gate G9 (also for the material carry-in gate G10). explain.
First, the worker who intends to use the material carry-in gate G9 enters the danger area H1 from the safety area S2 through the gate G2 (or gate G5). The passage through the gate G2 is performed by a method similar to the above method (establishment of entrance conditions).
Thereby, since an operator exists in the danger zone H1 (the number of calculations is 1 or more), the computer 33 prevents the extruders 12 and 13 from traveling (travel prohibition).

Next, the worker who has entered the dangerous area H1 releases the lock of the material carry-in gate G9 from the dangerous area H1 side and opens it. At this time, an output signal indicating that the material carry-in gate G9 is opened is output to the computer 33. Further, in this case, since the material carry-in gate G9 is opened, the computer 33 prevents the extruders 12 and 13 from running.
After the material carry-in gate G9 is opened, the worker can bring the material and move between the safe area S2 and the dangerous area H1. Here, even if the operator who unlocked the material carry-in gate G9 leaves the danger area H1, the extruders 12 and 13 cannot run by the computer 33 because the material carry-in gate G9 is open.

After the transportation of the materials is completed, the worker (the worker who entered from the gate G2 (or gate G5)) confirms that all other workers have exited from the hazardous area H1 to the safety area S2, and then carries the materials. The gate G9 is closed. Thereby, the computer 33 cancels the travel stop conditions of the extruders 12 and 13 due to the opened state of the material carry-in gate G9.
Then, the worker leaves the danger area H1 through the gate G2 (or the gate G5) to the safety area S2. The passage through the gate G2 is performed by the same method as described above (establishment of exit condition). Thus, the computer 33 also eliminates the travel stop condition of the extruders 12 and 13 due to the presence of an operator in the danger zone H1 (the number of calculations is 1 or more).
By the above method, the worker can carry in and carry out the material safely.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included. For example, a case where the entrance / exit management system for the dangerous area of the present invention is configured by combining a part or all of the above-described embodiments and modifications is also included in the scope of the right of the present invention.
Further, in the above embodiment, the case where the entrance / exit management system to the dangerous area is applied to the coke oven equipment has been described. However, the boundary between the dangerous area where the vehicle travels and the safety area is divided by the gate, and this dangerous area If it is the facility which an operator enters / exits, it will not specifically limit, For example, it can also apply to the facilities of various manufacturing plants, such as a steel mill, a motor vehicle, a chemical plant, a foodstuff, and a processed product.

In the above embodiment, the worker is in danger from the safe area under the three conditions: 1) ID recognition of the worker, 2) The switch generates an entrance permission signal to the dangerous area, and 3) The vehicle is stopped. Conditions for entering the area. However, if at least the above condition 1) is satisfied, either of the above conditions 2) or 3) may be satisfied, that is, the satisfaction of the two conditions may be used as the entry condition for the worker. it can. For example, as a precondition, when the switch of 2) above always generates an entrance permission signal to the dangerous area (always permits entry), the establishment of the two conditions of 1) and 3) For admission.
Furthermore, in the above embodiment, direction identification when an operator passes through the gate is performed based on the usage status of the ID tag readers provided on the entrance side and the exit side of each gate and the recognition status of the passage recognition sensor. It was. However, when a tripod type gate is used as the gate, the passing direction of the operator can be identified by detecting the rotation direction of the bar of each gate.

DESCRIPTION OF SYMBOLS 10: Entrance / exit management system to dangerous area, 11: Coke oven equipment, 12, 13: Extruder (vehicle), 14-16: Guide vehicle (vehicle), 17: Control apparatus, 18, 19: Furnace group, 20 : Inspection vehicle (vehicle), 21, 22: fire extinguisher, 22a: cab, 23-28: partition fence, 29, 30: ID tag reader, 31: indicator lamp (display means), 32: passage recognition sensor, 33: Computer (gate control means), 34: input means, 35: switch (input / output means)

Claims (8)

A danger area where one or more vehicles travel on the track, a plurality of safety areas provided outside the danger area, a gate provided at each boundary between the danger area and the safety areas, and the gate In a dangerous area entrance and exit management system having a control device that manages equipment including
The control device is provided at or near the gate, an ID tag reader for identifying IDs of visitors to and from the danger area, and display means provided at or near the gate. When,
Provided in the driver's cab of the vehicle, an entrance / exit output means for instructing permission and refusal to enter the dangerous area from the driver's cab, input means for registering an operator's ID in advance, and opening / closing operation of the gate Gate control means,
The entrance of the worker to the dangerous area by opening the gate by the gate control means is as follows. 1) The ID of the worker identified by the ID tag reader is registered in advance by the input means by the gate control means. 2) The entrance / exit output means generates a signal for allowing the operator to enter the dangerous area to the gate control means, and 3) the vehicle is stopped. Of the transmission of a signal to the gate control means, it is performed by satisfying the condition of 1) and either or both of 2) or 3),
The worker's exit from the dangerous area due to the gate opening by the gate control means is the ID of the worker identified by the ID tag reader registered in advance by the input means by the gate control means. On the condition that it is recognized,
The gate control means calculates the number of workers actually present in the dangerous area from the number of workers entering the dangerous area by the gate and the number of workers leaving the dangerous area. An entry / exit management system for a dangerous area, wherein the vehicle is stopped when an operator is present in the dangerous area. 2. The entrance / exit management system for a hazardous area according to claim 1, wherein the display means includes: a) the vehicle is moving, b) an operator ID is being identified, and c) the gate. An entrance / exit management system for a dangerous area, characterized by displaying that it is possible to enter the dangerous area through. The danger area entry / exit management system according to claim 1 or 2, wherein the gate is provided with an emergency switch for opening the gate without identification of an operator's ID. Entrance / exit management system for the area. The entrance / exit management system to the dangerous area according to any one of claims 1 to 3, wherein a material carrying gate wider than the gate is provided at a boundary between the dangerous area and the safety area. An entrance / exit management system for hazardous areas, characterized by being provided. In the entrance / exit management system to the dangerous area of any one of Claims 1-4, the said dangerous area and the said safety area are set to the coke oven installation provided with the some coke oven, The said vehicle is, An entrance / exit management system for a hazardous area, comprising: an extruder provided on a coke extrusion side of the coke oven; and a guide wheel provided on a coke exit side of the coke oven. 6. The entrance / exit management system for a dangerous area according to claim 5, wherein the safety area is also provided in the extruder and the guide vehicle. The dangerous zone entrance / exit management system according to claim 5 or 6, wherein the coke oven facility is divided into a plurality of furnace groups each having a plurality of coke ovens, and the dangerous area is set in a specific furnace group. In doing so, an entry / exit management system for a dangerous area, wherein the other furnace group is released from the dangerous area. 8. The entrance / exit management system for a dangerous area according to claim 7, wherein the setting of the dangerous area to the specific furnace group is performed by a mechanical stopper that can be opened and closed. .

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