JP2003036104A - Emergency stop device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an emergency stop device which can speedily handle an accident in such a case and eliminates the need to periodically make a function check. SOLUTION: In a standby area 4 in which no accident possibly occurs, a standby area communication terminal 12 is provided which can communicate with only a portable terminal 11 in the standby area 4, and in a control area 3 where an accident is possibly caused by a machine 2 capable of entering and exiting from it through the standby area 4, a control area communication terminal 13 is provided which can communicate with only a portable terminal 11 in the control area 3; and the normalcy of the communication function of the portable terminal 11 is confirmed by confirming communication with all portable terminals 11 according to information from both the communication terminals 12 and 13 and if emergency stop information is received from a portable terminal 11 in the control area 3, the operation permission output of a control terminal 14 sent to a controller 2A of the machine 2 is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency stop device for industrial machines and the like, and more particularly to an emergency stop device which can be operated by a portable terminal carried by an operator.

[0002]

2. Description of the Related Art For example, in a factory equipped with industrial machines, an emergency stop device is provided as an auxiliary safety device. This emergency stop device is mainly used for avoiding the spread of accidents, and it is necessary to be able to immediately stop the machine in the event of an accident.

Therefore, conventionally, for example, a plurality of emergency stop switches are arranged at appropriate intervals along a fence surrounding the machine, and an operator can operate the emergency stop switches to cause an emergency stop of the machine when an accident occurs. Is done.

[0004]

However, in the case of the conventional device in which the emergency stop switch is fixed around the machine, there is a problem that the emergency stop switch cannot be swiftly responded to if an installation location of the emergency stop switch is not remembered. Also,
Since the emergency stop device is not usually used, there is a problem that it is necessary to regularly check whether the emergency stop switch works properly.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an emergency stop device capable of quickly responding to an accident and eliminating the need for periodical function check.

[0006]

Therefore, in the emergency stop device according to the first aspect of the present invention, a standby area in which an accident is unlikely to occur, and an accident can be caused by a machine that can enter and exit through the standby area. Establishing a management area with a certain nature, equipped with an information transmission unit capable of transmitting emergency stop information and its own existence information, a predetermined number of mobile terminals carried by a worker who enters the management area are always provided in the standby area, and The presence information of each mobile terminal is received to confirm whether the communication function of the mobile terminal is normal, and when the emergency stop information is received from the mobile terminal in the management area, the operation permission output to the machine is stopped and controlled. Then, the control means for emergency stop of the machine is provided.

With such a construction, the worker carries in the portable terminal when he enters the management area. The control means receives the presence information of each mobile terminal, confirms whether the communication status of all the mobile terminals is normal based on the reception status, and the emergency stop information is generated from the mobile terminals in the management area. When this is received, the operation permission output of the machine is stopped. Specifically, as in claim 2, the control means is a standby area communication terminal that is installed in the standby area and can communicate only with a mobile terminal in the standby area, and a standby area communication terminal installed in the management area. A management area communication terminal capable of communicating only with a mobile terminal, and when the presence information of all the mobile terminals is received based on the presence information received by both of the communication terminals, it is determined that the communication function of the mobile terminals is normal and And a control terminal for stopping and controlling the operation permission output of the machine when the emergency stop information of the mobile terminal is received via the management area communication terminal.

With this configuration, the standby area communication terminal and the management area communication terminal receive the presence information of the portable terminal.
The control terminal determines that the communication function of the mobile terminals is normal when the presence information of all the mobile terminals is received by both communication terminals. Also, when the emergency stop information is received via the management area communication terminal, the operation permission output of the machine is stopped. Claim 3
As described above, if the control terminal is configured to generate the operation permission output of the machine when the communication function of the mobile terminal is normal and the emergency stop information of the mobile terminal is not received, the communication function of the mobile terminal The operation permission output can be stopped when an abnormality is detected.

According to a fourth aspect of the present invention, as many monitoring units as the number of mobile terminals are provided to monitor whether or not the emergency stop information transmission function of the mobile terminals is checked in the standby area.
When a mobile terminal whose execution of the check is not confirmed moves to the management area, it is preferable to stop the operation permission output of the control terminal based on the output of the corresponding monitoring unit.

In such a configuration, when the worker does not check the emergency stop information transmitting function of the portable terminal in the standby area before entering the management area, the control terminal stops the operation permission output by the notification from the monitoring unit. Become. Specifically, the monitoring unit outputs an output when the emergency stop transmission function of the mobile terminal is checked based on the information received from the standby area communication terminal, as in claim 5. A circuit, a standby area presence information confirmation circuit that generates an output when the presence information of the portable terminal is received in the standby area, and a standby terminal presence information confirmation circuit output to the hold terminal, Stop function check circuit First self-holding circuit that receives the output and self-holds the output, management area presence information confirmation circuit that outputs when the presence information of the mobile terminal is received in the management area, and hold terminal A second self-holding circuit for inputting the output of the existence information confirmation circuit for the controlled area to the trigger terminal and the output of the first self-holding circuit for inputting the output to the trigger terminal; An emergency stop information check circuit that generates an output when stop information is not received, an AND gate that performs a logical product operation of the second self-holding circuit output and the emergency stop information check circuit output, the AND gate output and the standby area existence And an OR gate for ORing the outputs of the information confirmation circuit to generate a confirmation output.

As in the sixth aspect of the present invention, it is preferable that a portable terminal possession confirmation means for confirming whether or not the worker possesses the portable terminal is provided at the boundary between the standby area and the management area. 8. The portable terminal possession confirmation means is claim 7.
As described above, passage detecting means for detecting that a worker has passed the boundary between the standby area and the management area, and communication means capable of communicating with the mobile terminal when the worker passes through the boundary between the standby area and the management area. And a determination means for determining that the portable terminal is in possession when the communication means outputs an output indicating that the communication is present while the passage detection output is being generated.

In such a structure, when the worker enters the management area from the waiting area, the passage detecting means detects the operator. At this time, if the communication unit is not communicating with the mobile terminal, the determination unit determines that the mobile terminal is not carried. As in claim 8,
The passage detecting means includes first and second optical sensors provided on the standby area side and the management area side across the boundary, and detects the passage of an operator when the light beam of each optical sensor is blocked. It is preferable that the determination means be configured to determine the moving direction of the worker based on the detection output generation order of both optical sensors.

With such a configuration, it is possible to determine whether the worker moves from the standby area to the management area or from the management area to the standby area. Therefore, in which area the worker left the mobile terminal when he / she does not have it. You will be able to judge. The notification means is provided in the portable terminal possession confirmation means according to claim 9, and when the communication means does not generate an output indicating communication when the passage detection means detects passage of an operator, the notification means performs work. It is preferable that the person is informed that the mobile terminal is not carried.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a first embodiment of an emergency stop device according to the present invention. In FIG. 1, when using the emergency stop device of the present embodiment,
The machine 2 surrounded by the fence 1 is installed to provide a control area 3 which is a dangerous area where an accident may occur, and a standby area 4 which is a safety area where the machine 2 does not exist and an accident may not occur. . A partition is provided around the management area 3 so that it cannot enter and exit, and the entrance and exit of the management area 3 can be done only through the entrance and exit 5 provided at the boundary between the management area 3 and the waiting area 4 and always pass through the waiting area 4. To do so. 6 in the figure is a fence 1
It is a doorway provided in. The fence 1 may not be provided.

A predetermined number of emergency stop devices are always provided in the standby area 4, and a portable terminal 1 carried by an operator when entering the management area 3.
1, a standby area communication terminal 12 fixedly installed in the standby area 4, a management area communication terminal 13 fixedly installed in the management area 3, and a machine based on the reception information of both communication terminals 12 and 13. 2 and the control terminal 14 for controlling the operation permission output to the control device 2A. here,
The standby area communication terminal 12 and the management area communication terminal 1
3 and the control terminal 14 constitute a control means.

The portable terminal 11 includes, for example, an emergency stop button as an emergency stop operation unit, and an information transmission unit that periodically transmits presence information and transmits the emergency stop information when the emergency stop button is operated. . This mobile terminal 1
It is desirable that the item 1 is preliminarily incorporated into, for example, a helmet or other wearing equipment that the worker wears when entering the control area 3, but the object to be incorporated is not limited to this.
Also, the transmission method of emergency stop information is not limited to button operation,
A method of detecting the intention of the emergency stop from the movement of the human body and transmitting it may be considered.

The standby area communication terminal 12 can communicate only with the mobile terminals 11 in the standby area 4 within the communication area of the standby area 4, and informs the control terminal 14 of the number of mobile terminals 11 in communication. In addition, the emergency stop information of the mobile terminal 11 is not accepted. Communication terminal 1 for the management area
3 has a communication range within the management area 3 and can communicate only with the mobile terminals 11 within the management area 3, and notifies the control terminal 14 of the number of mobile terminals 11 that are in communication with the mobile terminal 1.
This is a configuration capable of receiving the emergency stop information of No. 1. Incidentally, FIG.
In the above, the management area communication terminal 13 is shown as one representative, but it is assumed that a plurality of communication terminals 13 are provided at appropriate positions around the machine 2, and at least one is provided from the standby area 4 to the management area 3 by the worker. It is installed at a position where information from the mobile terminal 11 can be immediately received when entering.

The control terminal 14 includes both communication terminals 12, 1.
It is equipped with a function to determine whether the total number of mobile terminals transmitted from 3 matches the predetermined number that is always provided in the standby area and to confirm whether the communication functions of all mobile terminals 11 are normal. When the communication function of the mobile terminal 11 is normal and the emergency stop information is not received from the management area communication terminal 13, the operation permission output is output to the control device 2A of the machine 2, and the communication functions of all the mobile terminals 11 are The configuration is such that the operation permission output is stopped and controlled when it is not normal or / and when the emergency stop information is received from the management area communication terminal 13.

Next, the operation will be described. The standby area communication terminal 12 receives the presence information periodically transmitted from the mobile terminals 11 in the standby area 4, and transmits the received mobile terminal number information to the control terminal 14. Management area communication terminal 13
Receives the presence information periodically transmitted from the mobile terminal 11 in the management area 3 owned by the worker present in the management area 3, and transmits the number information of the received mobile terminals to the control terminal 14. . For example, it is assumed that the worker carries the portable terminal 11 which is always provided in the standby area 4 and enters the management area 3 through the doorway 5 in order to work in the management area 3. in this case,
The number of mobile terminals from the standby area communication terminal 12 decreases by one, and the number of mobile terminals from the management area communication terminal 13 decreases by one.
The number will increase. In this way, the worker
By going in and out of, the number information transmitted by both communication terminals 12 and 13 changes, but the total value does not change from the predetermined number that is always stored in the standby area 4.

The control terminal 14 determines whether or not the total number of mobile terminals transmitted from both communication terminals 12 and 13 matches a predetermined number, and if they match, the communication functions of all mobile terminals 11 are determined. It is determined to be normal, and if they do not match, it is determined that there is a mobile terminal 11 having an abnormal communication function. If it is determined that the communication function of the mobile terminal 11 is abnormal, the control terminal 14 extinguishes the operation permission output of the machine 2 and immediately stops the machine 2 in an emergency. In this way, since the operation check is always performed by the communication between the mobile terminal 11 and both communication terminals 12 and 13, it is not necessary to check the operation regularly as in the conventional case. And the control terminal 1
4 confirms the presence / absence of emergency stop information from the management area communication terminal 13, and when the emergency stop information is received from the management area communication terminal 13, the operation permission output of the machine 2 is extinguished, and the machine 2 is immediately returned to the emergency state. Stop.

According to this construction, since each worker carries the portable terminal 11 for the emergency stop operation, it is not necessary to remember the position of the emergency stop switch as in the conventional fixed installation method of the emergency stop switch, and the accident is prevented. The emergency stop operation at the time of occurrence can be performed quickly. Further, since the communication function of the mobile terminal 11 is constantly checked, it is not necessary to perform a regular operation confirmation work of the emergency stop device, and the cost required for maintaining and managing the emergency stop device can be reduced.

As a method of checking the communication function of the mobile terminal 11, in addition to the method of checking the number of mobile terminals communicating, for example, an ID unique to each mobile terminal 11 is used.
Information is given, ID information is periodically transmitted from each mobile terminal 11 as its own existence information, and based on the received ID information, the control terminal 14 checks whether or not the communication function of each mobile terminal 11 is normal. It may be a method.

Next, a second embodiment of the present invention will be described. The second embodiment is provided with a function of preventing the portable terminal 11 from being brought into the management area 3 without checking the emergency stop function of the mobile terminal 11 in the standby area 4. FIG. 2 shows a block diagram of the control terminal 20 of the second embodiment. The rest of the configuration is similar to that of the first embodiment. However, it is necessary to specify the mobile terminal 11, and in the second embodiment, the mobile terminal 11 transmits unique ID information as the existence information.

Referring to FIG. 2, the control terminal 14 of the present embodiment.
Is N as a monitoring unit that monitors whether or not the emergency stop function check is performed in the standby area 4 for each of a predetermined number (N in this case) of mobile terminals 11 that are always provided in the standby area 4. Monitor circuits 21-1 to 21-N, and an AND gate 22 that performs a logical AND operation on the confirmation outputs of the monitor circuits 21-1 to 21-N to generate an operation permission output.

The configuration of the monitor circuits 21-1 to 21-N will be described. The monitor circuits 21-1 to 21-N
Have the same configuration, and the monitor circuit 21-1 will be described here. The monitor circuit 21-1 includes an emergency stop function check circuit 21A for checking whether or not the emergency stop function check of the mobile terminal 11 having the corresponding ID number # 1 is performed based on the information from the standby area communication terminal 12. , A standby area presence information confirmation circuit 21B for checking whether or not the ID information is periodically received from the portable terminal 11 having the ID number # 1 in the standby area 4, and the hold terminal H for confirming the standby area presence information. The output of the circuit 21B is input, the output of the emergency stop function check circuit 21A is input to the trigger terminal T, and the first self-holding circuit 21C that holds the trigger input by itself and the management area based on the information from the communication terminal 13 for the management area Three
Output of the management area presence information confirmation circuit 21D for checking whether or not the ID information is periodically received from the portable terminal 11 having the ID number # 1 inside, and the hold area H output of the management area presence information confirmation circuit 21D. Input to trigger terminal T
A second self-holding circuit 21E that receives the output of the self-holding circuit 21C and holds the trigger input by itself, an emergency stop information check circuit 21F that checks whether or not emergency stop information is received from the management area communication terminal 13, and a second Self-holding circuit 21
AND gate 21G for ANDing the output of E and the output of emergency stop information check circuit 21F, and AND gate 21
It is configured to include an OR gate 21H that performs an OR operation on the output of G and the output of the standby area presence information confirmation circuit 21B.

Next, the operation of the second embodiment will be described. If the standby area communication terminal 12 receives the presence information periodically transmitted from the mobile terminal 11 having the ID number # 1 and inputs the information to the standby area presence information confirmation circuit 21B, the standby area presence information exists. An output of logical value 1 is generated from the information confirmation circuit 21B, and the hold terminals H and O of the first self-holding circuit 21C are generated.
Input to the R gate 21H. Therefore, all mobile terminals 1
If the ID information of 1 is received by the standby area communication terminal 12, all the monitor circuits 21-1 to 21-N output the logical value 1 and the AND gate 22 outputs the operation permission output. The machine 2 is ready for operation.

In this state, the ID number # 1 is set in the waiting area 4.
When the emergency stop function check of the mobile terminal 11 is performed,
The information with the emergency stop function check is input from the standby area communication terminal 12 to the emergency stop function check circuit 21A, and the output of the logical value 1 is input from the emergency stop function check circuit 21A to the trigger terminal T of the first self-holding circuit 21C. To do. As a result, the output of the logical value 1 is input from the first self-holding circuit 21C to the trigger terminal T of the second self-holding circuit 21E. The first self-holding circuit 21C self-holds this output and stores that the emergency stop function check is performed.

When the worker carries the portable terminal 11 having the ID number # 1 and enters the management area 3, the ID information periodically transmitted from the portable terminal 11 is received by the management area communication terminal 13. The information is the existence information confirmation circuit 21 for the management area.
Then, the control area presence information confirmation circuit 21D outputs a logical value of 1 and inputs it to the hold terminal H of the second self-holding circuit 21E. As a result, the output of the logical value 1 is input to the AND gate 21G from the second self-holding circuit 21E. At this time, if the emergency stop information is not input from the management area communication terminal 13, the emergency stop information check circuit 2
Since the output of logical value 1 from 1F is input to the AND gate 21G, the output of logical value 1 is input from the AND gate 21G to the OR gate 21H. When the mobile terminal 11 with ID number # 1 moves from the standby area 4 to the management area 3, the output of the standby area presence information confirmation circuit 21B becomes a logical value 0, but if the mobile terminal 11 with ID number # 1 is normal. Before that, the output of the logical value 1 is generated from the AND gate 21G, so that the output of the logical value 1 of the OR gate 21H is continued. Further, the output of the first self-holding circuit 21C also has a logical value of 0, but the second self-holding circuit 2E is provided by the self-holding function of the second self-holding circuit 21E.
The logical value 1 of 1E continues.

On the other hand, when the portable terminal 11 is brought into the management area 3 without performing the emergency stop function check, the first self-holding circuit 21C does not output the logical value 1, and the standby area existence information confirmation circuit. When the output of the logical value 1 of 21B disappears, the output of the logical value 1 of the OR gate 21H disappears,
The operation permission output of the AND gate 22 disappears. As described above, according to the second embodiment, the emergency stop function check of the mobile terminal 11 must be performed in the standby area 4 in order to enter the management area 3 and perform the work. It will be further improved and the safety of workers will be ensured more reliably.

In this embodiment, the monitor circuit 21-1
.. 21-N is provided on the control terminal 14 side,
It may be provided on the mobile terminal 11 side. In this case, the mobile terminal 11 and the communication terminals 12, 1 for the management area and the standby area
The information communication form with 3 is reversed. That is, the mobile terminal 11 side receives signals periodically transmitted from the communication terminals 12 and 13 for the management area and the standby area. In addition, the emergency stop function check circuit 21A and the emergency stop information check circuit 21F are configured to make a determination based on the operation information of their own operation unit, and further, the OR gate 21
The confirmation output from H is configured to be wirelessly transmitted to the control terminal 14. The control terminal 14 generates the driving permission output from the AND gate 22 while receiving the confirmation output from all the mobile terminals 11. In this configuration, since the control terminal 14 does not need to identify the mobile terminal 11, the mobile terminal 11
The presence information transmitted from the control terminal 14 to the control terminal 14 is not limited to the unique ID information as long as it simply indicates the presence. The operation of each monitor circuit 21-1 to 21-N is the same as that of the case where it is provided on the control terminal 14 side, and the description thereof will be omitted.

Next, a third embodiment of the present invention will be described. The third embodiment is provided with a function of preventing an operator from entering the management area 3 without carrying the mobile terminal 11. FIG. 3 shows the main configuration of this embodiment. Note that FIG. 3 shows an example applied to the emergency stop device of the second embodiment. The same elements as those in the second embodiment are designated by the same reference numerals.

3, in the emergency stop device of the third embodiment, in addition to the configuration of the second embodiment, entrance / exit management as a portable terminal possession confirmation means at the entrance / exit 5 at the boundary between the standby area 4 and the management area 3 is performed. The device 30 is provided to monitor whether or not an operator passing through the device 30 has the mobile terminal 11. The entrance / exit management device 30 is, as shown in FIG.
The first optical sensor 3 provided on the standby area 4 side with the doorway 5 interposed therebetween
1 and a second optical sensor 32 provided on the side of the management area 3, FIG.
A communication terminal 33 as a communication means having a communicable range shown by a broken line, an alarm device 34 as an alarm means for issuing an alarm to an operator who does not carry the mobile terminal 11 and passes through the doorway 5, 2 Based on the outputs from the optical sensors 31 and 32 and the communication terminal 33, it is determined whether or not the worker who passes through the doorway 5 has the mobile terminal 11, and the mobile confirmation output and the alarm output are controlled based on the determination result. And a control device 35 as a determination unit for performing the operation. The first and second
The optical sensors 31 and 32 form a passage detecting unit.

The control terminal 14 has the AN shown in FIG.
An AND gate 23 for ANDing the output of the D gate 22 and the portable confirmation output of the entrance / exit management device 30 is provided, and the output of the AND gate 23 is used as the operation permission output. Next, the operation will be described. When the worker enters the communication range of the communication terminal 33 of the entrance / exit management device 30 (the range indicated by the broken line in FIG. 3), the light beam of the first optical sensor 31 is cut off and the output of the first optical sensor 31 becomes a logical value 0. Becomes At this time, if the worker has the mobile terminal 11, as shown in the time chart of FIG. 5, the communication terminal 33 and the mobile terminal 11 communicate with each other to output a logical value 1 indicating that communication is present from the communication terminal 33. Occurs and the portable confirmation output is held at the logical value 1. On the other hand, the worker uses the mobile terminal 11
6, the output of the communication terminal 33 remains the logical value 0 indicating no communication as shown in the time chart of FIG. 34 is driven to inform the operator that the mobile terminal 11 is not carried. If the worker shuts off the light beam of the second optical sensor 32 without noticing this alarm, the portable confirmation output of the logical value 1 output from the control device 35 disappears as shown in the time chart of FIG. The value becomes 0, and the operation permission output of the AND gate 23 of the control terminal 14 disappears.
It should be noted that the notification means may be any means capable of notifying the operator of the lack of possession, such as voice, indicator light, or screen display.

According to the third embodiment, it is possible to prevent the worker from entering the management area 3 without carrying the portable terminal 11. Even if the user enters the management area 3 without carrying the portable terminal 11, the operation permission output of the control terminal 14 disappears and the operation of the machine 2 is stopped, so that the safety of the worker can be ensured.
In the time charts of FIGS. 5 and 6, the worker is in the waiting area 4
This is an example of moving from the control area 3 to the management area 3, but when moving from the management area 3 to the standby area 4, the first optical sensor 31
Then, the operation order of the second optical sensor 32 is reversed. Therefore, since the moving direction of the worker can be detected from the operation order of the first optical sensor 31 and the second optical sensor 32, the worker can detect the mobile terminal 11
It is possible to judge whether the person has left it in the management area 3 or the waiting area 4 when he / she does not have it.

In the third embodiment, the optical sensor is used to detect the passage of the worker, but an automatic door or wireless communication in a narrow area can be used. In each of the above-described embodiments, the communication terminals 12 and 13 that communicate with the mobile terminal are separately fixed for the standby area and the management area and fixed so that the communicable range is limited. Without limitation, at least two communication terminals may be fixed and the position of the mobile terminal may be detected based on the principle of triangulation. That is, the distance from the mobile terminal to each communication terminal is calculated based on the transmission / reception time between the mobile terminal and each communication terminal, and the mobile terminal is calculated based on the triangulation principle from both calculated values and the distance between the communication terminals which is known in advance. The position of can be detected. It is possible to identify whether the mobile terminal is in the standby area or the management area based on the map data defining the detection position, the standby area, and the management area. When this detection method is adopted, for example, when multiple machines are installed in the controlled area, the position of the mobile terminal that has generated the emergency stop information is detected, and the machine existing in the effective range of the mobile terminal is selected. Control such as emergency stop is possible.

[0036]

As described above, according to the first and second aspects of the invention, the machine can be stopped by the portable terminal carried by the worker, so that it is possible to quickly respond when an accident occurs. Also, unlike the conventional emergency stop switch fixed type, there is no need to remember the installation location of the switch. Further, since the communication function of the mobile terminal is constantly checked, regular maintenance and inspection work are unnecessary, and the management cost of the emergency stop device can be reduced.

According to the third aspect of the invention, since the operation of the machine is not permitted when the abnormality of the communication function of the portable terminal is detected, the safety of the worker can be secured. According to the inventions of claims 4 and 5, it is necessary to check the emergency stop function of the mobile terminal before entering the management area in order to work in the management area. This will bring in the safety of the worker.

According to the sixth and seventh aspects of the present invention, it is possible to detect a worker who attempts to enter the management area without carrying a portable terminal. According to the invention of claim 8, when the worker who does not carry the mobile terminal is detected, it is possible to determine whether the mobile terminal is left in the management area or the standby area. According to the invention of claim 9, it is possible to inform an operator who does not own the mobile terminal and tries to enter the management area of the lack of the mobile terminal.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a first embodiment of the present invention.

FIG. 2 is a configuration diagram of main parts of a second embodiment of the present invention.

FIG. 3 is a configuration diagram of main parts of a third embodiment of the present invention.

FIG. 4 is a block diagram of an entry / exit management device according to the third embodiment.

FIG. 5 is an operation time chart of the entrance / exit management device when a mobile terminal is owned.

FIG. 6 is an operation time chart of the entry / exit management device when the mobile terminal is not carried

[Explanation of symbols]

2 machines 3 controlled areas 4 waiting areas 11 mobile terminals 12 Communication terminal for standby area 13 Management area communication terminals 14 Control terminal 21-1 to 21-N monitor circuit 22 AND gate 30 Access control device

Claims (9)

[Claims] 1. A standby area where an accident is unlikely to occur and a management area where an accident due to a machine may occur through the waiting area are set, and emergency stop information and own presence information are set. A predetermined number of mobile terminals carried by workers who enter the management area and which are capable of transmitting information are constantly provided in the standby area, and the presence information of each of the mobile terminals is received, and the communication function of the mobile terminals is normal. It is configured to include a control unit that confirms whether or not the emergency stop information is received from the portable terminal in the management area and stops the operation permission output to the machine to stop the machine in an emergency. Emergency stop device. 2. The control means is capable of communicating only with a standby area communication terminal installed in the standby area and capable of communicating only with mobile terminals within the standby area, and with a mobile terminal installed in the management area and within the management area. Management area communication terminal, and when the presence information of all mobile terminals is received based on the presence information received by both communication terminals, it is determined that the communication functions of the mobile terminals are normal, and the management area communication terminal is The emergency stop device according to claim 1, further comprising: a control terminal that stops and controls the operation permission output of the machine when the emergency stop information of the mobile terminal is received via the control terminal. 3. The control terminal is configured to generate an operation permission output of the machine when the communication function of the mobile terminal is normal and the emergency stop information of the mobile terminal is not received.
Emergency stop device described in. 4. The number of monitoring units for monitoring whether or not the emergency stop information transmitting function of the mobile terminal is checked in the standby area is provided, and the number of mobile terminals whose execution of the check is not confirmed is the above-mentioned. The emergency stop device according to any one of claims 1 to 3, wherein the operation permission output of the control terminal is stopped based on the output of the corresponding monitoring unit when moving to the management area. 5. The emergency stop function check circuit for producing an output when the emergency stop transmission function of the mobile terminal is checked based on the information received from the standby area communication terminal, and the mobile terminal. Presence information confirmation circuit for standby area that generates an output when the presence information is received in the standby area, and the output of the presence information confirmation circuit for the standby area is input to the hold terminal and the emergency stop function check circuit output to the trigger terminal. A first self-holding circuit for self-holding an input and an output, a control area presence information confirmation circuit for producing an output when the presence information of the portable terminal is received in the control area, and a control area presence information at a hold terminal. The emergency stop information is received from the second self-holding circuit, which receives the confirmation circuit output and the first self-holding circuit output to the trigger terminal and holds the output by itself, and the emergency stop information from the communication terminal for the controlled area. An emergency stop information check circuit that generates an output when it is open, an AND gate that performs a logical product operation of the second self-holding circuit output and the emergency stop information check circuit output, the AND gate output, and the standby area presence information confirmation circuit output 5. An emergency stop device according to claim 4, further comprising: an OR gate that performs a logical OR operation to generate a confirmation output. 6. A portable terminal possession confirmation means for confirming whether or not an operator possesses the portable terminal is provided at a boundary between the standby area and the management area. Emergency stop device 7. The portable terminal possession confirmation means, passage detection means for detecting that the worker has passed the boundary between the standby area and the management area, and the worker passes the boundary between the standby area and the management area. 7. The communication device according to claim 6, further comprising: communication means capable of communicating with the mobile terminal, and determination means for determining that the mobile terminal is in possession when the communication means outputs an output indicating that communication is in progress while the passage detection output is being generated. Emergency stop device. 8. The passage detecting means comprises first and second optical sensors provided on the standby area side and the management area side across the boundary, and when a light beam of each optical sensor is cut off, an operator passes. The emergency stop device according to claim 7, wherein the determination means is configured to determine the moving direction of the worker based on the detection output generation order of both optical sensors. 9. The notification means is provided in the portable terminal possession confirmation means, and if the communication means does not generate an output indicating communication when the passage detection means detects passage of the operator, the notification means informs the operator. The emergency stop device according to claim 7 or 8, wherein the emergency stop device is configured to notify that the mobile terminal is not carried.