JP3616696B2 - Entrance / exit monitoring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to, for example, an apparatus for monitoring the entry / exit of a worker to / from a dangerous area where the movable part of the machine can come into contact with the worker, and particularly monitors the entry / exit of the worker to / from the dangerous area using a responder. The present invention relates to an entry / exit monitoring device.
[0002]
[Prior art]
For example, in order to avoid an accident caused by contact between a machine movable part and an operator, the operation range of the machine movable part is defined as a dangerous area, and when an operator enters this dangerous area, the machine movable part It is necessary to perform safety control for stopping the operation and safety control for confirming that the worker has left the dangerous area and starting operation of the machine movable part.
[0003]
As a conventional technique for performing the control as described above, for example, an entrance monitoring means for detecting the entry of the worker and an exit monitoring means for detecting the exit of the worker are provided at the boundary of the dangerous area. It is known that the operation of the machine movable part is stopped when the entry of the operator is detected by the monitor means, and the operation of the machine movable part is started when the exit monitor means detects the exit of the worker. As this entry monitoring means, for example, a light beam sensor or the like that detects the entry of the worker based on the interruption of the light beam is used, and as the exit monitoring means, for example, the operator can operate by operating the operation start button. What detects the person's exit is used.
[0004]
As another conventional technique, for example, there is known a tablet system in which a dangerous area is surrounded by a guard provided with an entrance, and a locking means is provided at the entrance. In this tablet system, the doorway is locked during operation of the machine movable part, and can be unlocked when the operation is stopped. That is, when entering the danger area, the operator confirms the stop of the operation of the machine movable part, unlocks the locking means at the entrance using the key, and enters the danger area with the key. Since the entrance / exit locking means cannot be locked without using a key, the entrance / exit cannot be locked while the worker is in the danger zone, and the operation of the machine movable part is not started. As a result, it is possible to avoid a situation in which the operation of the machine moving part is erroneously started despite the presence of the worker in the dangerous area.
[0005]
[Problems to be solved by the invention]
However, in such a conventional technique, in the former case, since the worker is monitored only at the boundary of the dangerous area, another worker or the like operates while the worker is working in the dangerous area. There is a risk of pushing the start button.
Further, in the latter case, when working with a plurality of workers, there is a possibility that the worker who has left the door may lock the entrance / exit even though the worker still remains in the dangerous area. . Even if one worker enters the dangerous area as a rule in principle, considering that the worker forgets to put the key outside the dangerous area, or that another person can perform the locking operation with another key, etc. There is a possibility of incorrect operations on the outside.
[0006]
In order to cope with such problems of the conventional technology, (1) when one or more workers are present, an operation indicating exit from the dangerous area is performed by the worker who has entered the dangerous area. (2) When there are multiple workers, an operation indicating that one worker has left the dangerous area is not performed by another worker who has entered the dangerous area together. Guarantee, is necessary.
[0007]
The present invention has been made in view of the above points, and it is possible to reliably monitor the entry / exit of an arbitrary number of workers by individually identifying the workers entering / exiting the dangerous area using a responder. An object is to provide an apparatus.
[0008]
[Means for Solving the Problems]
For this reason, the entrance / exit monitoring device according to claim 1 of the present invention enters / exits the danger area preset in the movable range of the machine.pluralTo the workerRespectivelyGiven and responds to a given detection actionpluralEnter the dangerous area with the respondereachDetecting the response from the responder possessed by the worker, Corresponding to each workerAn entry detection means for generating an entry detection signal, and an entry detection means generated by the entry detection meanseachBased on the approach detection signaleachThe operator's approachRespectivelyRememberpluralEnter memory and exit from the dangerous areaeachDetecting the response from the responder possessed by the worker, Corresponding to each workerExit detection means for generating an exit detection signal; andeachBased on the worker entry stored in the entry storage means and the exit detection signal generated by the exit detection means, the worker entered the dangerous area.eachAn exit confirmation signal indicating that the worker has exitedRespectivelyGeneratepluralExit confirmation means,First AND operation means for performing an AND operation of the exit confirmation signals from the respective exit confirmation means, and generating a signal indicating that all workers who have entered the dangerous area have exited;It was configured with.
[0009]
According to this configuration, the responder was ownedpluralWhen an operator enters the hazardous area,eachThe response from the responder is detected by the entry detection means and stored in the entry storage means.eachThe operator's entry is stored. AndeachWhen an operator leaves the danger area,EachA response from the responder is detected by the exit detection means, and based on the detection result and the storage information of the approach storage means,eachThe exit confirmation means confirms the worker's exit and the exit confirmation signalRespectivelyGeneratedFurther, the first AND operation means performs AND operation of the exit confirmation signals from the respective exit confirmation means, and generates a signal indicating the exit of all workers who have entered the danger area.
[0010]
In the invention described in claim 2, the invention described in claim 1 is provided.As a specific configuration, an operation control means for controlling the operation of the machine according to a signal generated by the first AND operation means is provided.
[0011]
According to a third aspect of the present invention, in the first or second aspect of the present invention, a worker detecting means for detecting a worker entering the dangerous area and an input of an approach detection signal from the approach detecting means. A response confirmation signal, and a response confirmation means for stopping the generation of the response confirmation signal when an operator is detected by the worker detection means and there is no input of the entry detection signal;A signal indicating an operation result in the first AND operation meansAnd performing an AND operation of response confirmation signals from the response confirmation means,According to the calculation result, an exit confirmation signal indicating that all workers who have entered the dangerous area have exited is generated.Second AND operation meansAnd so on.
[0012]
According to such a configuration, when an operator who does not respond to the responder enters the dangerous area, the exit confirmation signal is not output from the second AND operation means. Therefore, workers who do not respond to responders remain in the danger area.NoThe exit confirmation signal is not erroneously generated even when
In invention of Claim 4, in the invention of any one of Claims 1-3, it approachs into the said dangerous area.eachAmong the workers, an entry permitting means for permitting the worker whose response from the responder is detected by the approach detection means to enter the dangerous area is provided.
[0013]
According to such a configuration, in the entry permission means, an operator who has a responder that operates normally is permitted to enter the dangerous area, and an operator who does not respond to the responder is prevented from entering.
According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, a response from the responder existing in a safety area outside the dangerous area is always detected.pluralComprising safe area response detection means,eachThe exit confirmation means is configured to generate the exit confirmation signal according to the detection result of the safety area response detection means.
[0014]
According to such a configuration, all workers present in the dangerous area and the safety area are monitored.
In the invention described in claim 6, as a specific configuration of the invention described in any one of claims 1 to 5,eachThe approach storage means uses the signal indicating the operation stop state of the machine as a hold input signal, the entry detection signal from the entry detection means as a trigger input signal, and self-holds the trigger input signal to generate an entry permission signal. Comprising first self-holding means,eachThe exit confirmation means uses the entry permission signal from the first self-holding means as a hold input signal, the exit detection signal from the exit detection means as a trigger input signal, and self-holds the trigger input signal to confirm the exit. A second self-holding means for generating a signal is provided.
[0015]
In a seventh aspect of the invention, as a specific configuration of the invention according to any one of the first to sixth aspects,eachThe responder is a card that stores information indicating that it is a monitoring target.
According to an eighth aspect of the present invention, in the invention according to the seventh aspect, the entry detecting means includes an entry reading unit that reads information stored in the card possessed by an operator entering the dangerous area. The aboveeachThe entry storage means issues a first card stacker unit for storing the card possessed by the worker who enters the dangerous area, and an auxiliary card that stores information read by the entry reading unit to the worker. An exit card reading unit, and the exit detection means includes an exit reading unit that reads information stored in the auxiliary card possessed by an operator exiting the dangerous area,eachA card return unit for returning a card storing information that matches information read by the exit reading unit out of the cards stored in the first card stacker unit; A card detection unit that detects the presence or absence of the card in the first card stacker unit, and a first exit confirmation unit that generates the exit confirmation signal when the card detection unit detects the absence of a card. did.
[0016]
According to such a configuration, when entering the dangerous area, the card possessed by the worker is stored in the first card stacker unit, and an auxiliary card storing the same information as the information stored in the card is issued to the worker. The Further, when leaving the dangerous area, the information of the auxiliary card possessed by the worker is read by the withdrawal reading unit, and the card storing the information corresponding to the information is returned from the first card stacker unit to the worker. Then, when the card detection unit detects that the card in the first card stacker unit has run out, the first exit confirmation unit generates an exit confirmation signal.
[0017]
The invention according to claim 9 is the invention according to claim 7, wherein the entry detecting means includes a card issuing unit that issues the card to an operator entering the dangerous area,eachA first card count for counting the number of cards issued from the card issuing unit, and a second card stacker unit that stores a predetermined number of cards in advance as cards issued from the card issuing unit. And the exit detection means has a reading unit for reading information stored in the card possessed by the worker who exits from the dangerous area,eachThe exit confirmation means counts the cards in the second card stacker unit, the card collection unit that collects the card to be monitored in the second card stacker unit based on the information read by the reading unit. And a second exit confirmation unit that generates the exit confirmation signal when the number of cards counted by the second card counter matches the predetermined number.
[0018]
According to such a configuration, the card stored in the second card stacker unit is issued to the worker when entering the dangerous area. When leaving the danger area, the information of the card possessed by the worker is read, and only the card to be monitored issued at the time of entry is collected. Then, the number of cards in the second card stacker unit is counted by the second card counting unit, the number of cards matches the predetermined number prepared in advance in the second card stacker unit, and all cards are collected. Then, an exit confirmation signal is generated by the second exit confirmation unit.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, as an example of an entry / exit monitoring device that is considered useful in understanding the present invention,A case will be described in which only one worker enters and leaves the dangerous area where the machine movable part and the worker can come into contact.
FIG.The above entrance / exit monitoring deviceIt is a block diagram which shows the structure of these.
[0021]
In FIG. 1, this apparatus includes an entry detection unit as an entry detection unit that detects an operator's entry into a dangerous area preset in the operation range of the machine movable unit using a responder 1 possessed by the worker. 2, an exit detection unit 3 as an exit detection means for detecting the exit of the worker from the dangerous area using the responder 1 possessed by the worker, and FIG. 2 described later provided at the boundary of the dangerous area. A gate control unit 4 that controls the operation of the gate G as an entry permission means installed at the entrance and exit of the guard g shown, and a detection signal R as an entry detection signal from the entry detection unit 2_DThe detection signal R as the exit detection signal from the exit detection unit 3_S, A gate monitor signal G described later from the gate control unit 4_MAnd an operation-off signal Off that indicates the operation stop state of the machine movable unit is input, and an exit / exit processing unit 5 that generates an exit confirmation signal when no worker is present in the dangerous area, and an entry / exit processing unit 5 output the signal. And an operation control unit 6 as operation control means for controlling the operation of the machine movable unit in response to the exit confirmation signal.
[0022]
The responder 1 is given to an operator who enters and leaves the danger area, and transmits a transmission signal sent from an entry detection unit 2 or an exit detection unit 3 described later into a response signal unique to the responder.
As shown in FIG. 2, the approach detection unit 2 includes a transmitter 2a and a receiver 2b, and transmits a transmission signal from the transmitter 2a to the responder 1 possessed by the worker who enters the dangerous area. The response signal converted in step 1 is received by the receiver 2b. When the receiver 2b receives the response signal from the responder 1, the detection signal R indicating that the worker enters the dangerous area._DIs output.
[0023]
As shown in FIG. 2, the exit detection unit 3 includes a transmitter 3 a and a receiver 3 b, and transmits a transmission signal from the transmitter 3 a to the responder 1 possessed by the worker who exits the dangerous area. The response signal converted in (1) is received by the receiver 3b. When the receiver 3b receives the response signal from the responder 1, the detection signal R indicating that the worker leaves the dangerous area._SIs output.
[0024]
As shown in FIG. 3, the gate control unit 4 includes an AND gate 4a that performs a logical product operation of the operation off signal Off and an entry permission signal described later from the entry / exit processing unit 5, and outputs and inputs of the AND gate 4a. The gate drive device 4b opens and closes the gate G based on a later-described exit confirmation signal from the exit processing unit 5. Further, the gate drive device 4b is configured so that when the gate G is in a closed state, the gate monitor signal G_MIs output.
[0025]
As shown in FIG. 4, the entry / exit processing unit 5 includes a self-holding circuit 5a as a first self-holding means and a self-holding circuit 5b as a second self-holding means. The self-holding circuit 5a detects the detection signal R from the approach detection unit 2._DIs used as a trigger input signal, and an operation permission signal Off is used as a hold input signal, and an approach permission signal that self-holds the trigger input signal is output. This entry permission signal is a signal for confirming that the worker has the responder 1 responding normally and has entered the danger area. Therefore, when the responder 1 does not respond, for example, when an operator forgets to place the responder 1 in a safety area outside the danger area and enters the danger area, the entry permission signal is not output from the self-holding circuit 5a. The self-holding circuit 5b receives the detection signal R from the exit detection unit 3._SIs used as a trigger input signal, an entry permission signal from the self-holding circuit 5a is used as a hold input signal, and an exit confirmation signal in which the trigger input signal is self-held is output. This exit confirmation signal is a signal for confirming that the worker detected by the exit detection unit 3 is the worker previously detected by the entry detection unit 2. That is, an exit confirmation signal is output when an operator who has the responder 1 and enters the dangerous area leaves the dangerous area. Further, as will be described later, the self-holding circuit 5a is reset when the operation of the machine movable portion is started and the output of the operation off signal Off is lost. By resetting the self-holding circuit 5a, the output of the entry permission signal is lost and the self-holding circuit 5b is also reset. In this way, the entry / exit processing unit 5 functions as an entry storage unit and an exit confirmation unit.
[0026]
As shown in FIG. 4, the operation control unit 6 includes a self-holding circuit 6a and a movable unit driving device 6b. The self-holding circuit 6 a uses the exit confirmation signal from the self-holding circuit 5 b as a trigger input signal, and the gate monitor signal G from the gate control unit 4._MIs used as a hold input signal, and a start permission signal with the trigger input signal held by itself is output. This activation permission signal is a signal for confirming that there is no worker in the dangerous area and that the worker is prevented from entering by the gate G. Further, the self-holding circuit 6a has a gate monitor signal G when the gate G is opened._MIt will be reset when the output of is lost. The movable part driving device 6b drives the machine movable part according to the activation permission signal from the self-holding circuit 6a, and outputs an operation-off signal Off when the machine movable part is in the operation stop state.
[0027]
The self-holding circuits 5a, 5b, and 6a described above include a fail-safe window comparator / AND gate composed of a plurality of transistors, a voltage doubler rectifier circuit, and a feedback resistor. US Pat. No. 5,027,114, etc. Therefore, the description thereof is omitted here.
next,Entrance / exit monitoring device shown in FIG.Will be described.
[0028]
First, when an operator tries to work in a dangerous area, he must always have the responder 1 and after confirming that the machine moving part is in an operation stop state (when the machine moving part is in an operation state). After the operation is stopped), entry into the dangerous area is performed from the entrance / exit provided in the guard g surrounding the boundary of the dangerous area. At this time, since the machine movable part is in the operation stop state, the operation off signal Off is output from the movable part driving device 6b and becomes the hold input signal of the self-holding circuit 5a.
[0029]
When the worker enters the boundary of the danger area, the possessed responder 1 receives a transmission signal from the transmitter 2a of the entry detection unit 2 and transmits a response signal. This response signal is received by the receiver 2b of the entry detection unit 2. As shown in FIG. 5, the detection signal R is received from the receiver 2b._DIs output. This detection signal R_DBecomes a trigger input signal of the self-holding circuit 5a of the entry / exit processing unit 5.
[0030]
In the self-holding circuit 5a of the entry / exit processing unit 5, the detection signal R_DIs input as a trigger input signal, the trigger input signal is held by itself, and the entry permission signal shown in FIG. 5 is generated. This entry permission signal continues until the operation of the machine movable part is started and the self-holding circuit 5a is reset. Then, the generated entry permission signal is sent to the gate control unit 4 and input to the self-holding circuit 5b as a hold input signal. In the gate controller 4, the AND gate 4a calculates the logical product of the entry permission signal and the driving off signal Off, and the calculation result is sent to the gate driving device 4b to open the gate G. By opening the gate G, the worker moves into the danger area. On the other hand, in the self-holding circuit 5b, the detection signal R from the exit detection unit 3_SNo exit confirmation signal is generated from the self-holding circuit 5b. Therefore, the activation permission signal is not generated from the self-holding circuit 6a of the operation control unit 6, and the operation of the machine movable unit remains stopped, and the safety of the operator is ensured.
[0031]
Next, when the worker leaves the danger area, the responder 1 possessed by the worker receives a transmission signal from the transmitter 3a of the exit detection unit 3 and transmits a response signal, and this response signal detects the entry. As shown in FIG. 5, the detection signal R is received from the receiver 3b._SIs output. This detection signal R_SBecomes a trigger input signal of the self-holding circuit 5b of the entry / exit processing unit 5.
[0032]
In the self-holding circuit 5b, the detection signal R_SIs input as a trigger input signal, the trigger input signal is held by itself and an exit confirmation signal shown in FIG. 5 is generated. This exit confirmation signal continues until the entry permission signal is not output from the self-holding circuit 5a and the self-holding circuit 5b is reset. The generated exit confirmation signal is sent to the gate control unit 4 and also input to the self-holding circuit 6a of the operation control unit 6 as a trigger input signal. In the gate control unit 4, the gate G is closed by the gate driving device 4b that has received the exit confirmation signal, and the gate monitor signal G_MIs output. This gate monitor signal G_MIs input to the self-holding circuit 6a of the operation control unit 6 as a hold input signal.
[0033]
The self-holding circuit 6a self-holds the trigger input signal based on the exit confirmation signal from the self-holding circuit 5b, generates a start permission signal, and sends the start permission signal to the movable part driving device 6b. The movable part driving device 6b activates the machine movable part in response to the activation permission signal.
The operation off signal Off is stopped by the start of the operation of the machine movable portion, and as shown in FIG. 5, the entry permission signal output from the self-holding circuit 5a of the entry / exit processing portion 5 is reset, and this entry permission signal is stopped. Along with this, the exit confirmation signal output from the self-holding circuit 5b is also reset. Further, the self-holding circuit 6a has a gate monitor signal G when the gate G is opened._MIt will be reset when the output of is lost. Therefore, since the start permission signal continues to be output as long as the gate G is not opened even when the operation of the machine movable part is stopped, it is not necessary to perform the above-described series of responder response detections every time the operation is stopped.
[0034]
However, when the self-holding output of the self-holding circuit 6a is reset when the power is turned on or during a power failure, the activation permission signal is not generated unless the response of the responder is detected once. In addition, even if a power failure occurs during work in a hazardous area, the self-holding entry permission signal is reset.RuTherefore, it is necessary to perform similar response detection.
in this wayEntrance / exit monitoring device shown in FIG.According to the above, the worker who has entered the dangerous area has the responder 1 and monitors the worker's entry into and exits from the dangerous area based on the response from the responder. It is possible to reliably detect whether or not the vehicle has left the safe area, and the safety of the worker in the dangerous area is ensured. Further, by providing the gate G at the entrance / exit of the boundary of the dangerous area, it is possible to prevent an operator who does not respond to the responder from entering the dangerous area.
[0035]
next,Of the present inventionEmbodiments will be described.
First1In this embodiment, there will be described a case where there are a plurality of workers (in this case, n persons) entering and leaving the dangerous area and the work in the dangerous area is always performed by n persons.
FIG.1It is a block diagram which shows the structure of the entrance / exit monitoring apparatus which concerns on this embodiment. However,Entrance / exit monitoring device shown in FIG.The same parts as those in FIG.
[0036]
In FIG. 6, this apparatus is a responder 1 that each worker possesses the entry of n workers into the dangerous area.₁~ 1_nAn entry detection unit 2 'that detects and identifies using the and the exit of each worker from the dangerous area, the responder 1₁~ 1_nThe exit detection unit 3 ′ that detects and identifies using the gate, the gate control unit 4 ′ that controls the operation of the gate G, and the reversal detection signal R that detects the worker entering the dangerous area._inThe worker detection unit 7 serving as a worker detection means for outputting the signal, and the inversion detection signal R from the worker detection unit 7_inAnd a detection signal R from the entry detection unit 2 ′_D1~ R_DnAnd a response confirmation unit 8 as a response confirmation unit for determining whether the worker entering the vehicle has a responder, and a detection signal R from the entry detection unit 2 ′._D1~ R_DnThe detection signal R from the exit detection unit 3 ′_S1~ R_SnThe response confirmation signal from the response confirmation unit 8 and the operation off signal Off indicating the operation stop state of the machine movable unit are input to generate an exit confirmation signal when there is no worker in the dangerous area. Processing unit 5_1nWhen,In the case of the entrance / exit monitoring device shown in FIG.And the same operation control unit 6.
[0037]
Responder 1₁~ 1_nIs given to each of the n workers entering and leaving the danger area, and a transmission signal sent from the entry detection unit 2 ′ or the exit detection unit 3 ′ is sent to each responder 1₁~ 1_nIt is converted into a response signal unique to the system and transmitted. The approach detection unit 2 ′Entrance / exit monitoring device shown in FIG.As in the case of the entry detection unit 2, the transmitter 2a and the receiver 2b (see FIG. 2) are provided, and a transmission signal is sent from the transmitter 2a to the responder possessed by each worker entering the dangerous area. The response signal converted by the responder is received by the receiver 2b. When the receiver 2b receives the response signal from each responder, the receiver 2b identifies the response signal and detects each of the detection signals R corresponding to the workers whose entry has been detected._D1~ R_DnIs output.
[0038]
The exit detection unit 3 ′Entrance / exit monitoring device shown in FIG.Similarly to the entry detection unit 3 of FIG. 2, the transmitter 3a and the receiver 3b (see FIG. 2) are provided, and a transmission signal is sent from the transmitter 3a to the responder possessed by each worker leaving the dangerous area, The response signal converted by the responder is received by the receiver 3b. When the receiver 3b receives the response signal from each responder, the receiver 3b identifies the response signal and detects the detection signal R corresponding to each worker whose exit has been detected._S1~ R_SnIs output.
[0039]
As shown in FIG. 7, the gate control unit 4 ′ includes an OR gate 4c, an AND gate 4a ′, and a gate driving device 4b. The OR gate 4c includes an entry / exit processing unit 5_1nOR operation of each entry permission signal to be described later is performed. The AND gate 4a ′ performs an AND operation between the operation result of the OR gate 4c and the operation off signal Off. The gate driving device 4b isEntrance / exit monitoring device shown in FIG.Similarly to the above, the calculation result of the AND gate 4a ′ and the entry / exit processing unit 5_1nThe gate G is opened and closed based on the exit confirmation signal from. Further, the gate drive device 4b receives the gate monitor signal G when the gate G is in a closed state._MIs output.
[0040]
The worker detection unit 7 detects the worker himself entering the dangerous area. The detection result is an inversion detection signal R._inIs output as Inversion detection signal R_inIs a signal that turns the output from on to off when the worker enters the dangerous area and turns the output on again when the worker enters the dangerous area.
As shown in FIG. 8, the response confirmation unit 8 includes two OR gates 8a and 8b and a self-holding circuit 8c. The OR gate 8a receives the detection signal R from the entry detection unit 2 '._D1~ R_DnPerform the logical OR operation. The OR gate 8b includes the calculation result of the OR gate 8a and the inversion detection signal R from the worker detection unit 7._inOR operation with. The self-holding circuit 8c uses the calculation result of the OR gate 8b as a hold input signal, uses the preset signal as a trigger input signal, and self-holds the trigger input signal to generate a response confirmation signal. However, the preset signal is a signal that can be generated only by the administrator of the apparatus, and the administrator can set the self-holding circuit 8c again by this preset signal.
[0041]
Entrance / exit processing part 5_1nAs shown in FIG. 9, n entry / exit confirmation circuits 5₁~ 5_nAND gate 5A as first AND means₁AND gate 5A as a second AND means₂It consists of. Entrance / exit confirmation circuit 5₁~ 5_nIs a self-holding circuit 5_1a~ 5_naAnd self-holding circuit 5_1b~ 5_nbEach self-holding circuit 5_1a~ 5_naIs a detection signal R from the entry detector 2 '._D1~ R_DnIs set as a trigger input signal, the operation off signal Off is set as a hold input signal, and the trigger input signal is held by itself to generate an entry permission signal. Each self-holding circuit 5_1b~ 5_nbIs a detection signal R from the entry detector 3 '._S1~ R_SnAs a trigger input signal, self-holding circuit 5_1a~ 5_naIs used as a hold input signal, and the trigger input signal is self-held to generate first to n-th exit confirmation signals. AND gate 5A₁Is an entry / exit confirmation circuit 5₁~ 5_nThe logical product of each exit confirmation signal from is calculated. Furthermore, the AND gate 5A₂The response confirmation signal from the response confirmation circuit 8 and the AND gate 5A₁An exit confirmation signal indicating the exit of all the workers is generated by calculating a logical product with the operation result.
[0042]
Each self-holding circuit 8c, 5_1a~ 5_na5_1b~ 5_nbThe configuration is the same as the configuration of the known self-holding circuit described above.
Where1The operation of the embodiment will be described.
First, one of the n workers (here, worker W_iAnd However, i is an arbitrary number from 1 to n), but when entering the dangerous area, the worker W_iResponder 1_iAfter confirming that the movable part of the machine is in a stopped state, the inside of the dangerous area can be seen from the entrance / exit provided on the card surrounding the boundary of the dangerous area.Whatenter in. At this time, since the machine movable part is in the operation stop state, the operation off signal Off is output from the movable part driving device 6b.
[0043]
Worker W_iWhen entering the danger zone boundary,Entrance / exit monitoring device shown in FIG.Similar to the operation of the responder 1_iReceives a transmission signal from the entry detection unit 2 ′ and transmits a response signal. The response signal is received and identified by the entry detection unit 2 ′, and the detection signal R_DiIs output. This detection signal R_DiIs input to the OR gate 8a of the response confirmation unit 8 and the entry / exit processing unit 5_1nSelf-holding circuit 5_iaTrigger input signal. In addition, the worker detection unit 7 detects the worker W entering the dangerous area._iDetects itself and reverse detection signal R_inOutput from on to off.
[0044]
In the response confirmation unit 8, the detection signal R_DiIn response, the output of the OR gate 8a is turned on, and the output of the OR gate 8b is turned on in response to the operation result of the OR gate 8a. The output from the OR gate 8b becomes the hold input signal of the self-holding circuit 8c, and a response confirmation signal is generated.
Here, the response confirmation unit 8 will be described in detail. First, when there is no worker entry, the entry detection unit 2 'detects the detection signal R._DiIs not generated, the output of the OR gate 8a of the response confirmation unit 8 is turned off, but the inversion detection signal R in the on state is output from the worker detection unit 7._inIs output, the output of the OR gate 8b is turned on. In the self-holding circuit 8c, the hold input signal is turned on by the output of the OR gate 8b, and the trigger input signal is also turned on by the preset signal generated by the administrator. Generate a signal. Next, responder 1_iW who possesses_iWhen the vehicle enters the danger area, the reverse detection signal R from the worker detection unit 7_inIs turned off, but the detection signal R from the approach detection unit 2 '_DiIs output, and the self-holding circuit 8c continuously generates a response confirmation signal. Here, it is assumed that the worker W_iResponder 1_iDoes not respond (worker W_iResponder 1_iIn this case, the detection signal R is detected by the approach detection unit 2 ′ as in the case where there is no entry by the worker._DiIs not generated, but the worker W entering the worker detection unit 7_iDetected by itself and inverted detection signal R_inOutput from on to off. As a result, the output of the OR gate 8b is turned off, the hold input signal of the self-holding circuit 8c is turned off, and the response confirmation signal from the self-holding circuit 8c is not generated.
[0045]
Entrance / exit processing part 5_1nEntrance / exit confirmation circuit 5_iThen, the detection signal R_DiSelf-holding circuit 5_iaIs input as a trigger input signal, the trigger input signal is self-held to generate an entry permission signal, and the self-hold circuit 5_ibAs a hold input signal and sent to the gate controller 4 '. Self-holding circuit 5_ibHere, the detection signal R from the exit detection unit 3 '_SiSince there is no input, self-holding circuit 5_ibNo i th exit confirmation signal is generated. As a result, the AND gate 5A₁Is turned off and the AND gate 5A₂No exit confirmation signal is generated.
[0046]
In the gate control unit 4 ′, the entry / exit processing unit 5_1nThe output of the OR gate 4c is turned on in response to the entry permission signal from, the AND gate 4a 'calculates the logical product of the operation off signal Off and the output from the OR gate 4c, and the calculation result is the gate drive device 4b. To open the gate G. By opening the gate G, the worker moves into the danger area.
[0047]
In the operation control unit 6, the entry / exit processing unit 5_1nSince no exit confirmation signal is generated from the self-holding circuit 6a (see FIG. 4), no activation permission signal is generated. Therefore, the operation of the machine movable part remains stopped and the operator W_iSafety is ensured.
In the same manner as described above, the entry of n workers into the dangerous area is detected, and the entry / exit processing unit 5_1nEach self-holding circuit 5_1a~ 5_naThe entrance permission signal is output from.
[0048]
Next, one worker W among the n workers who entered the dangerous area_iWhen a person leaves the danger area, the responder 1_iReceives a transmission signal from the exit detection unit 3 ′ and transmits a response signal. The response signal is received and identified by the entry detection unit 3 ′, and the detection signal R_SiIs output. This detection signal R_SiThe entry / exit processing unit 5_1nIs input.
[0049]
Entrance / exit processing part 5_1nThen, the detection signal R_SSelf-holding circuit 5_ibIs input as a trigger input signal, the trigger input signal is self-maintained to generate an i-th exit confirmation signal, and this i-th exit confirmation signal is generated by the AND gate 5A.₁Is input. AND gate 5A₁Then, each self-holding circuit 5_1b~ 5_nbAND operation of the 1st to n-th exit confirmation signals from is performed. Here, since another worker still exists in the dangerous area and not all the first to nth exit confirmation signals are generated, the AND gate 5A₁Is turned off and the AND gate 5A₂No confirmation signal is generated for everyone leaving. Therefore, the operation control unit 6 does not generate a start permission signal, and the operation of the machine movable unit remains stopped, and the safety of other workers existing in the dangerous area is ensured.
[0050]
When all n workers in the dangerous area have left the safe area, the detection signal R is output from the exit detection unit 3 '._S1~ R_SnOccurs, entry / exit processing unit 5_1nEach self-holding circuit 5_1b~ 5_nb1st to nth exit confirmation signals are respectively generated from the AND gate 5A.₁Is turned on. This AND gate 5A₁AND of the ON output of the signal and the response confirmation signal from the response confirmation unit 8 is AND gate 5A.₂Calculated with The response confirmation signal is not generated when one worker who does not respond to the responder enters the dangerous area, and is continuously generated when the responses of all the responders who have entered the dangerous area are confirmed. Is done. Accordingly, when the exit of all workers whose response of the responder is confirmed at the time of entry is detected, the AND gate 5A.₂Will output a confirmation signal for everyone leaving. This exit confirmation signal for all members is sent to the gate control unit 4 ′ and the operation control unit 6.
[0051]
In the gate control unit 4 ′, the exit confirmation signal is input to the gate driving device 4b, the gate G is closed by the gate driving device 4b, and the gate monitor signal G_MIs output. In the operation control unit 6,In the case of the entrance / exit monitoring device shown in FIG.In the same way as for everyone's exit confirmation signal and gate monitor signal G_MIn response to this, a start permission signal is generated, and the operation of the machine movable portion is started.
[0052]
Like this1According to the embodiment, the danger area is monitored by monitoring the entry / exit of the n workers to / from the danger area based on the response from each responder possessed by the n persons entering / leaving the danger area. It is possible to individually detect that n workers who have entered the safety zone have left the safety area, and the safety of the n workers who have entered the dangerous area is ensured. In addition, since the worker detection unit 7 and the response confirmation unit 8 are provided, when a worker whose response of the responder is not confirmed enters the danger area, the operation of the machine movable unit is not started. The safety of workers in the area can be further ensured.
[0053]
Note that the above1In the above embodiment, the case where the work in the dangerous area is always performed by n people has been described. However, even if the number of workers working in the dangerous area changes, by applying this embodiment, It is possible to monitor entry into and exit from dangerous areas. For example, when the number of workers varies between 1 and n, the entry / exit processing unit 5 shown in FIG._1nThe entry / exit processing unit 5 configured as shown in FIG._1n'And it is sufficient.
[0054]
In FIG. 10, the entry / exit processing unit 5_1n'Is the entry / exit processing unit 5_1nAre different from each entry / exit confirmation circuit 5₁~ 5_nCorresponding to the safety region presence detection circuit 5 as a safety region response detection means₁'-5_n′ And each OR gate 5B₁~ 5B_nThe corresponding entry / exit confirmation circuit 5₁~ 5_nAnd safety area existence confirmation circuit 5₁'-5_nThis is the point at which the logical sum operation of the output of ′ is performed. Each safety area existence confirmation circuit 5₁'-5_n′ Represents a self-holding circuit 5_1c~ 5_ncAND gate 5_1d~ 5_ndThe self-holding circuit 5_1c~ 5_ncIs a detection signal R from the exit detection unit 3 '._S1~ R_SnIs a hold input signal, and an operation on signal On generated during operation of the machine movable part is a trigger input signal. Each self-holding circuit 5_1c~ 5_ncOf the corresponding responder 1 when the machine moving part is operated.₁~ 1_nIs generated after confirming that it is in the safe area, and then the corresponding responder 1₁~ 1_nIs continuously generated as long as it exists in the safe area. AND gate 5_1d~ 5_ndIs a self-holding circuit 5_1c~ 5_ncAnd the operation OFF signal Off generated when the operation of the machine moving part is stopped, and the corresponding responder 1 is operated even when the operation of the machine moving part is stopped.₁~ 1_nIs provided to confirm that it exists in the safe area.
[0055]
With the above configuration, when an operator works in the hazardous area, the entry / exit of the worker into the hazardous area is confirmed by the corresponding entry / exit confirmation circuit, while the worker performs work in the hazardous area. If not, the fact that the worker continues to exist in the safety area is monitored by the corresponding safety area existence confirmation circuit to confirm that the worker has not entered the danger area. Therefore, the entry / exit confirmation circuit 5₁~ 5_nSafety region existence confirmation circuit 5 corresponding to the output of₁'-5_nEven if the number of workers working in the dangerous area changes by using the logical OR operation result with the output of 'as the first to nth exit confirmation signals, the worker entering and leaving the dangerous area Can be reliably monitored.
[0056]
Next2The embodiment will be described. First2In this embodiment, a case where a magnetic card is used as a responder will be described.
FIG.2It is a block diagram which shows the structure of the entrance / exit monitoring apparatus which concerns on this embodiment.
[0057]
In FIG. 11, this apparatus receives the magnetic card Cm from the worker when entering the danger area, reads the information stored in the magnetic card Cm, and the entry reading unit 10 reads the information. The inspection unit 11 that inspects whether or not entry is possible based on the information, and the magnetic card Cm received by the entry reading unit 10 are conveyed to the magnetic card stacker 12 as the first card stacker unit according to the inspection result of the inspection unit 11. The information read by the entry reading unit 10 is written in accordance with the inspection result of the inspection unit 11 to the copy card Cc as an auxiliary card provided in the magnetic card transport unit 13 and the copy card stacker 14, and the copy There is no magnetic card Cm in the issuing unit 15 as an auxiliary card issuing unit that passes the card Cc to the worker and in the magnetic card stacker 12. The magnetic card absence detection unit 16 as a card detection unit that detects this and generates an exit confirmation signal, and upon exit from the dangerous area, the copy card Cc is received from the operator and stored in the copy card Cc. The exit reading unit 17 for reading information, the stacker reading unit 18 for reading the stored information of the magnetic card Cm stored in the magnetic card stacker 12, and the information read by the exit reading unit 17 and the stacker reading unit 18 are read. In accordance with the collation result of the collation unit 19, the collation unit 19 that collates information, the copy card conveyance unit 20 that conveys the copy card Cc received by the withdrawal reading unit 17 to the copy card stacker 14, and exits. The return unit 21 returns the magnetic card Cm read by the stacker reading unit 18 to the worker. Here, the stacker reading unit 18, the collation unit 19, and the return unit 21 function as a card return unit and a first exit confirmation unit. In addition, the thick line arrow in FIG. 11 has shown the movement state of the magnetic card | curd Cm or the copy card | curd Cc.
[0058]
Configured in this way2The operation of the embodiment will be described.
The worker who enters the dangerous area has a magnetic card Cm in which information indicating that the person enters and leaves the dangerous area is monitored corresponding to the worker, and the magnetic card Cm is stored in the dangerous area. Presented to the entry reading unit 10 when entering. The approach reading unit 10 reads information stored in the magnetic card Cm, sends the information to the inspection unit 11 and the issuing unit 15, and passes the magnetic card Cm to the magnetic card transport unit 13. The inspection unit 11 inspects information from the entry reading unit 10 to determine whether or not to permit entry of the worker holding the presented magnetic card Cm into the dangerous area. This inspection result is sent to the magnetic card transport unit 13 and the issuing unit 15.
[0059]
When the inspection unit 11 permits the operator to enter, the magnetic card Cm is transported to the magnetic card stacker 12 by the magnetic card transport unit 13 and stored in the magnetic card stacker 12, and the issuing unit 15 Information from the entry reading unit 10 is copied to the copy card Cc provided in the copy card stacker 14, and is handed over to the operator who enters the copy card Cc. When the magnetic card Cm is stored in the magnetic card stacker 12, no operation permission signal is generated in the magnetic card absence detection unit 16, and the operation of the machine movable unit is stopped. An operator possesses a copy card Cc instead of the magnetic card Cm and enters the danger area to perform work. On the other hand, when the inspection unit 11 does not permit the worker to enter, the worker is prevented from entering by a gate (not shown) and the magnetic card Cm is returned to the operator. As a result, the number of magnetic cards in the magnetic card stacker 12 matches the number of workers present in the danger area.
[0060]
The worker who leaves the dangerous area hands over the copy card Cc received at the time of entry to the exit reading unit 17. The exit reading unit 17 reads the information stored in the copy card Cc, sends the information to the verification unit 19, and passes the copy card Cc to the copy card transport unit 20. Further, the stacker reading unit 18 takes out the magnetic card Cm stored in the magnetic card stacker 12 to read information, sends the information to the collating unit 19, and passes the taken out magnetic card Cm to the return unit 21. The collation unit 19 collates the information from the exit reading unit 17 and the information from the stacker reading unit 18 and sends the result to the copy card transport unit 20 and the return unit 21.
[0061]
As a result of the collation, when the mutual information matches, the copy card Cc is transported and stored by the copy card transport unit 20 to the copy card stacker 14, and the return unit 21 starts from the stacker reading unit 18. The delivered magnetic card Cm is returned to the worker who leaves. On the other hand, if the information does not match, the magnetic card Cm passed to the return unit 21 is returned to the magnetic card stacker 12, and the same verification operation as described above is performed for another magnetic card Cm in the magnetic card stacker 12. Is done.
[0062]
In this way, when all the magnetic cards Cm in the magnetic card stacker 12 are returned to the worker who leaves, the exit confirmation signal is output from the magnetic card absence detection unit. This exit confirmation signal is, for example,1As in the above embodiment, it is used for operation control of the machine movable part.
Like this2According to the embodiment, the magnetic card Cm is used as a responder, the magnetic card Cm of the worker who has entered the dangerous area is stored in the apparatus, and the entry / exit of the worker existing in the dangerous area is monitored, No. mentioned above1As in the embodiment, it is not necessary to set the number of workers entering / exiting the dangerous area in advance, and it is possible to reliably monitor the entry / exit of any number of workers. In addition, since the number of magnetic cards in the magnetic card stacker matches the number of workers in the dangerous area, even if there is a power failure, etc., it is easy to detect the remaining magnetic card in the magnetic card stacker. The presence of workers can be confirmed.
[0063]
Next3The embodiment will be described. First3In the embodiment,2While the embodiment of the present invention is an apparatus that detects that there is no magnetic card in the magnetic card stacker and determines that no worker is present in the dangerous area, the magnetic card prepared in the apparatus is dangerous. Explained when handing over to the worker entering the area, collecting the magnetic card when leaving, detecting that all the magnetic cards have returned to the device, and determining that there is no worker in the dangerous area To do.
[0064]
FIG.3It is a block diagram which shows the structure of the entrance / exit monitoring apparatus which concerns on this embodiment. In FIG. 12, this apparatus conveys a magnetic card stacker 30 as a second card stacker unit in which a predetermined number of magnetic cards Cm are prepared in advance, and a magnetic card Cm in the magnetic card stacker 30 to a dangerous area. An issuing transport unit 31 as a card issuing unit that issues to an entering worker, and a reading unit 32 that receives the magnetic card Cm presented by the worker leaving the dangerous area and reads information stored in the magnetic card Cm. And an inspection unit 33 that inspects information read by the reading unit 32, and a return unit that conveys the magnetic card Cm from which the information has been read by the reading unit 32 to the magnetic card stacker 30 according to the inspection result of the inspection unit 33. The conveyance unit 34 and the magnetic card Cm in the magnetic card stacker 30 are circulated to move the magnetic card Cm in the magnetic card stacker 30. A counter unit 35 that counts the number, a determination unit 36 as a second exit confirmation unit that determines the presence / absence of an operator in the dangerous area based on the count number of the counter unit 35 and sends an operation permission signal to the machine movable unit; Consists of
[0065]
Here, the inspection unit 33 and the return transport unit 34 function as a card collection unit, and the counter unit 35 functions as a first and second card detection unit. In addition, the counter unit 35 detects a magnetic card Cm in and out of the magnetic card stacker 30 in order to signal the start of the card circulation operation, and outputs of the sensor 35a and the power-on output of the apparatus. An OR gate 35b for calculating a logical sum is provided. In addition, the thick line arrow in FIG. 12 has shown the movement state of the magnetic card | curd Cm.
[0066]
Configured in this way3The operation of the embodiment will be described.
First, when starting the apparatus, a predetermined number of magnetic cards Cm are prepared in the magnetic card stacker 30 and the number is stored in the determination unit 36. The prepared magnetic card Cm stores information indicating that it is a monitoring target issued from this apparatus. When the apparatus is started by turning on the power, the power-on output is input to the OR gate 35b of the counter unit 30 to start the card circulation operation, and the number of magnetic cards Cm in the magnetic card stacker 30 is counted.
[0067]
When the worker enters the danger area, one magnetic card Cm among the magnetic cards Cm stored in the magnetic card stacker 30 is transported by the issuing transport unit 31 and delivered to the worker. The issuance of the magnetic card Cm is detected by the sensor 35a, and the start of the card circulation operation is signaled from the OR gate 35b to the counter unit 35. The number of magnetic cards Cm in the magnetic card stacker 30 counted by the counter unit 35 is sent to the determination unit 36 and compared with the number of magnetic cards Cm stored at the time of start-up. Here, since the number of magnetic cards Cm in the magnetic card stacker 30 has decreased from the time of starting, the exit confirmation signal is not output. The worker carries the delivered magnetic card Cm and proceeds to the dangerous area to perform the work. Therefore, the number of workers equal to the number of magnetic cards Cm prepared in the magnetic card stacker 30 can enter the dangerous area.
[0068]
When the worker leaves the danger area, the magnetic card Cm possessed is presented to the reading unit 32. The reading unit 32 reads information stored in the magnetic card Cm, sends the information to the inspection unit 33, and passes the magnetic card Cm to the return transport unit 34. Based on the information from the reading unit 32, the inspection unit 33 checks whether the presented magnetic card Cm is the magnetic card Cm issued from this apparatus when entering. If the inspection unit 33 determines that the magnetic card Cm is issued at the time of entry, the inspection result is sent to the return transport unit 34, and the magnetic card Cm is transported to the magnetic card stacker 30 and stored. The return of the magnetic card Cm is detected by the sensor 35a of the counter unit 35, and the sensor output is input to the OR gate 35b to signal the start of the card circulation operation from the OR gate 35b. As a result, the magnetic card Cm in the magnetic card stacker 30 circulates and the number thereof is counted. The counted number of magnetic cards is sent to the determination unit 36 and compared with a predetermined number of magnetic cards Cm prepared in the magnetic card stacker 30 first. If the count number of the counter unit 35 is equal to the predetermined number prepared first, it is determined that there is no worker in the dangerous area, and an exit confirmation signal is output. If the count number of the counter unit 35 is not equal to the predetermined number prepared first, it is still determined that there is an operator in the dangerous area, and the exit confirmation signal is not output.
[0069]
Like this3According to the embodiment, the magnetic card Cm is issued from the apparatus to the magnetic card Cm by issuing the magnetic card Cm to the worker who performs work in the dangerous area at the time of entering and collecting the magnetic card Cm at the time of leaving. It is only necessary to store information indicating that the object is a monitoring target, and it is not necessary to discriminate each magnetic card Cm, so that the apparatus configuration can be simplified. In addition, since it is not necessary for the operator to manage the magnetic card Cm except when working in a dangerous area, it is possible to provide an apparatus that is convenient for the operator.
[0070]
The above mentioned first1In the embodiment, the boundary of the dangerous area is surrounded by the guard g and the gate is provided at the entrance / exit. However, for example, instead of providing the guard g, the boundary of the dangerous area is monitored, for example, an optical sensor or the like. It is good also as a structure which installs this area monitor and monitors an operator's approach. In this case, the self-holding circuit 6a is reset by the entry detection signal of the area monitor, and after the worker leaves, the monitor signal is input to the self-holding circuit 6a as a hold input signal on condition that the area monitor is normal. , Generate a start permission signal.
[0071]
The second2, 3In the embodiment, the case where a magnetic card is used has been described. However, the responder used in the present invention is not limited to this. For example, an IC card or a non-contact card may be used. In addition3In this embodiment, every time the worker leaves and returns the magnetic card, the magnetic card in the magnetic card stacker is circulated to count the number. For example, the counted number is stored and stored. The number may be updated every time the magnetic card is issued or returned.
[0072]
In addition, the second1-3When a plurality of workers perform work in the dangerous area as in the embodiment described above, other workers take out the responders of the remaining workers and leave when there are still workers in the dangerous area. It is also possible to end up. To deal with this, for example,2, 3As in the above embodiment, responders are used as cards, each card stores identification information such as a password, and the other person's card is used for other work by confirming the password etc. to the worker when leaving. It may be configured such that a person cannot leave.
[0073]
【The invention's effect】
As described above, the invention according to claim 1 of the present invention enters and exits the dangerous area.pluralThe worker has a responderRespectivelyPossession,EachThe response from the responder is detected by the entry detection means and the exit detection means, and the approach storage means and the exit confirmation meanseachEntry / exit of workersIndividuallyBy monitoring, it entered the danger area without the wrong exit action as before.All ofSince it is possible to reliably detect the worker leaving, it is possible to improve the safety of the worker in the dangerous area.
[0074]
The invention described in claim 2In addition to the above effects, the operation control means is provided, so that the operation of the machine is controlled in accordance with the exit confirmation signal, so that the safety of the worker in the dangerous area can be further ensured.
In addition to the effect of the invention described in claim 1 or 2, the invention described in claim 3 detects a worker entering the danger area by the worker detection means, and generates a response confirmation signal from the response confirmation means. In the danger area, if the worker who has not confirmed the responder's response enters the danger area, the worker's exit will not be confirmed. The safety of the workers can be ensured.
[0075]
The invention according to claim 4 is the first aspect.3In addition to the effect of the invention described in any one of the above, since the entry permission means is provided, only the worker who responds to the responder is allowed to enter the dangerous area. Can be monitored more accurately.
In addition to the effect of the invention described in any one of claims 1 to 4, the invention described in claim 5 is provided with a safety region response detection means, and confirms the worker's exit according to the detection result. ThisWhenThus, even when the number of workers working in the dangerous area changes, the workers entering and leaving the dangerous area can be reliably monitored.
[0076]
In addition to the effects of the invention according to any one of claims 1 to 5, the invention according to claim 7 can be made an inexpensive responder with a simple configuration by using a responder as a card. is there.
In addition to the effect of the invention according to claim 7, the invention according to claim 8 stores the card possessed by the operator in the card stacker part when entering the danger area, and according to the presence or absence of the card in the card stacker part. By confirming the worker's exit, there is no need to set the number of workers entering and leaving the hazardous area in advance, and it is easy to start up the device due to a power failure. A device with excellent performance can be provided.
[0077]
In addition to the effect of the invention described in claim 7, the invention described in claim 9 is to be monitored by issuing a card to a worker entering the dangerous area and collecting the card upon exit. Since it is only necessary to store the information indicating the card in the card, the configuration of the device for processing the card can be simplified. Further, since the worker does not need to manage the card except when entering or leaving the danger area, the device can be more convenient for the worker.
[Brief description of the drawings]
FIG. 1 shows the present invention.Entrance / exit monitoring device related toIt is a block diagram which shows the structure of these.
[Figure 2]Entrance / exit monitoring device of FIG.It is a figure explaining a no entry detection part and an exit detection part.
[Fig. 3]Entrance / exit monitoring device of FIG.It is a figure which shows the structure of this gate control part.
[Fig. 4]Entrance / exit monitoring device of FIG.It is a figure which shows the structure of the entrance / exit processing part of this, and an operation control part.
[Figure 5]Entrance / exit monitoring device of FIG.It is a timing chart explaining the operation of.
FIG. 6 shows the first of the present invention.1It is a block diagram which shows the structure of this embodiment.
[Fig. 7] Same as above1It is a figure which shows the structure of the gate control part of this embodiment.
[Fig. 8] Same as above1It is a figure which shows the structure of the response confirmation part of embodiment of this.
[Fig. 9] Same as above1It is a figure which shows the structure of the entrance / exit processing part of embodiment.
FIG. 10 is a diagram showing a configuration of another entry / exit processing unit;
FIG. 11 shows the first of the present invention.2It is a block diagram which shows the structure of this embodiment.
FIG. 12 shows the first of the present invention.3It is a block diagram which shows the structure of this embodiment.
[Explanation of symbols]
1,1₁~ 1_n      Responder
2,2 'approach detector
3, 3 'Exit detection unit
4,4 'gate controller
5,5_1n, 5_1n’Entrance / exit processing department
6 Operation control unit
7 Worker detection unit
8 Response confirmation part
10 Approach reading section
11, 33 Inspection Department
12,30 Magnetic card stacker
13 Magnetic card transport
15 Issuing Department
16 Magnetic card absence detector
17 Exit reading section
18 Stacker reader
20 verification part
21 Return Department
31 Issuing transport section
32 Reading unit
34 Return transportation
35 Counter section
36 judgment part
G Gate
Cm magnetic card
Cc copy card

Claims (9)

A plurality of responders each of which is given to a plurality of workers entering and leaving a dangerous area set in advance in the movable range of the machine and responding to a predetermined detection operation;
An entry detecting means for detecting a response from the responder possessed by each worker entering the dangerous area and generating an entry detection signal corresponding to each worker ;
該進based on each ingress detection signal generated by the input detecting means, a plurality of ingress storage means for storing the entry of each worker respectively,
An exit detection means for detecting a response from the responder possessed by each worker exiting from the dangerous area and generating an exit detection signal corresponding to each worker ;
Generated based on the generated exit detection signal entry and the exit detector worker stored in said each entry storage unit, each worker entering into the danger area of the exit confirmation signal indicating that exited respectively A plurality of exit confirmation means,
First AND operation means for performing an AND operation of the exit confirmation signals from the respective exit confirmation means, and generating a signal indicating that all workers who have entered the dangerous area have exited;
An entrance / exit monitoring device characterized by comprising: 2. The entrance / exit monitoring apparatus according to claim 1, further comprising operation control means for controlling operation of the machine in accordance with a signal generated by the first AND operation means. Worker detection means for detecting each worker entering the dangerous area;
A response confirmation signal is generated in response to an input of an entry detection signal from the entry detection means, and the response confirmation signal is generated when an operator is detected by the worker detection means and no entry detection signal is input. A response confirmation means to cancel,
The logical product operation of the signal indicating the operation result in the first logical product operation means and the response confirmation signal from the response confirmation device is performed, and all workers who have entered the danger area have exited according to the operation result. a second aND operation means for generating an exit confirmation signal indicating,
The entry-exit monitoring apparatus according to claim 1, wherein further comprising a. Wherein among the workers entering the hazardous area, claims, characterized in that the response from the responder at the approach detecting means configured with entry permission means for permitting the entry into the detected operator only dangerous area The entry / exit monitoring device according to any one of Items 1 to 3. A plurality of safety area response detecting means for constantly detecting a response from the responder existing in the safety area outside the dangerous area;
The entry / exit according to any one of claims 1 to 4, wherein each of the exit confirmation means generates the exit confirmation signal according to a detection result of each of the safety area response detection means. Monitoring device. Each of the entry storage means uses a signal indicating the operation stop state of the machine as a hold input signal, an entry detection signal from the entry detection means as a trigger input signal, and self-holds the trigger input signal to provide an entry permission signal. Comprising first self-holding means for generating,
Each of the exit confirmation means uses the entry permission signal from the first self-holding means as a hold input signal, uses the exit detection signal from the exit detection means as a trigger input signal, self-holds the trigger input signal, and The entrance / exit monitoring device according to claim 1, further comprising a second self-holding unit that generates an exit confirmation signal. The entry / exit monitoring device according to claim 1, wherein each of the responders is a card that stores information indicating that it is a monitoring target. The entry detecting means has an entry reading unit for reading information stored in the card possessed by an operator entering the dangerous area;
Each of the entry storage means stores a first card stacker unit for storing the card possessed by the worker who enters the dangerous area, and an auxiliary card in which information read by the entry reading unit is stored. Has an auxiliary card issuing department to issue
The exit detection means has an exit reading unit that reads information stored in the auxiliary card possessed by an operator exiting the dangerous area,
Each exit confirmation means returns a card storing information that matches information read by the exit reading unit among the cards stored in the first card stacker unit to the worker. A card detection unit that detects the presence or absence of the card in the first card stacker unit, and a first exit confirmation unit that generates the exit confirmation signal when the card detection unit detects the absence of a card. 8. The entrance / exit monitoring device according to claim 7, wherein the entrance / exit monitoring device is configured as follows. The entry detection means has a card issuing unit that issues the card to a worker entering the dangerous area;
Each of the entry storage means counts the cards issued from the second card stacker unit that stores a predetermined number of cards in advance as cards issued from the card issuing unit, and the cards issued from the card issuing unit. A card counting unit,
The exit detection means has a reading unit that reads information stored in the card possessed by the worker who exits the dangerous area,
Each exit confirmation means counts the cards in the second card stacker unit, a card collection unit that collects the card to be monitored in the second card stacker unit based on the information read by the reading unit. And a second exit confirmation unit that generates the exit confirmation signal when the number of cards counted by the second card count unit matches the predetermined number. 8. The entrance / exit monitoring device according to claim 7, wherein

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