KR102346331B1 - Safety lockout system and operating method thereof - Google Patents

Abstract

The present invention relates to a safety locking system, which protects workers from unexpected operation when performing inspection and repair work of machine apparatuses and facilities at an industrial site, and an operating method thereof. According to an embodiment of the present invention, the safety locking system comprises: a locking remote switch box capable of shutting off an energy source in a work space and installed around a facility; and a shutoff device electrically connected to the locking remote switch box. The shutoff device includes a processor and a memory operatively connected to the processor and storing at least one code performed by the processor. The memory can store codes which, when executed through the processor, cause the processor to receive a shutoff request signal for the energy source from the locking remote switch box, shut off the energy source in response to the reception of the shutoff request signal, verify whether the shutoff of the energy source is completed, and output a verification completion signal to the locking remote switch box as the shutoff of the energy source is completed by the verification.

Description

SAFETY LOCKOUT SYSTEM AND OPERATING METHOD THEREOF

The present invention relates to a safety locking system for protecting workers from unexpected operation during inspection and maintenance of machinery and equipment in an industrial field, and an operating method thereof.

In industrial sites, numerous power machines and instruments (pumps, fans, etc.) are installed to operate the equipment of the process, and there are high and low voltage electric circuit breakers to supply electricity, which is the power. Each company conducts regular inspection and maintenance of process equipment and equipment for the purpose of proper productivity and efficiency, while also performing repair work in case of unexpected failure. Such inspection, maintenance, and repair work must be undertaken with the safety of workers secured, and the Industrial Safety and Health Act also stipulates this, and each company is operating a lockout tagout (LOTO) system to comply with it.

In this LOTO system, when the manager confirms the LOTO procedure suitable for the facility and job, the LOTO system notifies the relevant workers of the LOTO implementation and maintenance work, then identifies the cutoff location of the energy source that needs to be shut off, and restores the facility to normal. stop After that, when the blocking and verification of each energy source is completed, it is checked whether a lockout device and a tagout are installed by the operator, and the operation is performed. After the operation, the recovery sequence is reversed.

In the case of a production line to which the conventional LOTO system is applied, it takes a long time to block/verify each energy source, and to install a lockout and a tagout, there is a problem in that the equipment downtime increases. . In addition, since a person directly cuts off each energy source, there is a problem in that the probability of an accident increases due to the possibility of omission of the energy cutoff due to human error. In addition, as the number of energy sources to be blocked increases, there is a problem in that the required time and risk increase.

The above-mentioned background art is technical information that the inventor possessed for the derivation of the present invention or acquired in the process of derivation of the present invention, and cannot necessarily be said to be a known technique disclosed to the general public prior to the filing of the present invention.

Japanese Laid-Open Patent Publication No. 2009-032032 (2009.02.12)

One object of the present invention is to reduce equipment downtime by simplifying the LOTO point.

An object of the present invention is to secure safety from accidents caused by human error by systematizing and automating the blocking of each energy source.

The problem to be solved by the present invention is not limited to the above-mentioned problems, and other problems and advantages of the present invention not mentioned can be understood by the following description, and more clearly understood by the embodiments of the present invention will be In addition, it will be understood that the problems and advantages to be solved by the present invention can be realized by means and combinations thereof indicated in the claims.

A safety locking system according to an embodiment of the present invention includes a lockable remote switch box installed around a facility capable of shutting off an energy source in a work space, and a shut-off device electrically connected to the lockable remote switch box, wherein the processor includes a processor and a memory operatively coupled to the processor and storing at least one code to be executed on the processor, wherein the memory, when executed via the processor, causes the processor to signal a shut off request to the energy source from the lockable remote switch box. In response to the reception of the cutoff request signal, the energy source is cut off, it is verified whether the cutoff of the energy source is completed, and as the energy source cutoff is completed by verification, the verification completion signal is output to the lockable remote switch box You can store the code that causes you to do it.

A safety lock system according to another embodiment of the present invention is a safety lock system, comprising a lockable remote key box installed around a facility capable of blocking an energy source in a work space, and a blocking device electrically connected to the lockable remote key box wherein the blocking device comprises: a processor and a memory operatively coupled to the processor and storing at least one code to be executed by the processor, wherein the memory, when executed through the processor, causes the processor to activate the first key from the lockable remote key box. Upon receiving the RFID key input signal, the first RFID key information included in the received first RFID key input signal and the comparison result of the pre-stored RFID key information match the code for causing the energy source to be blocked.

In an operating method of a safety lock system according to an embodiment of the present invention, the blocking device receives a blocking request signal for an energy source from a lockable remote switch box installed around a facility capable of blocking an energy source in a work space The steps of, the blocking device blocking the energy source in response to the reception of the blocking request signal, the blocking device verifying whether the blocking of the energy source has been completed, the blocking device blocking the energy source by verification It may include outputting a verification completion signal to the lockable remote switch box upon completion.

A method of operating a safety lock system according to another embodiment of the present invention includes: receiving, by a blocking device, a first RFID key input signal from a lockable remote key box installed around a facility capable of blocking an energy source in a work space and, blocking the energy source according to the comparison result of the RFID key information included in the received first RFID key input signal and the pre-stored RFID key information, by the blocking device.

In addition to this, another method for implementing the present invention, another system, and a computer-readable recording medium storing a computer program for executing the method may be further provided.

Other aspects, features and advantages other than those described above will become apparent from the following drawings, claims, and detailed description of the invention.

According to the present invention, it is possible to reduce the equipment downtime by simplifying the LOTO point.

In addition, it is possible to secure safety from accidents caused by human error by systematizing and automating the blocking of each energy source.

In addition, the operator can safely perform the work through real-time diagnosis and monitoring of the energy cut-off state until the maintenance work is completed.

In addition, it is possible to check and respond to unintended operation and energy source input in real time during maintenance, so that the operator can perform work safely.

Effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is an exemplary view of a safety lock system according to an embodiment of the present invention.
FIG. 2 is a view schematically illustrating a lockable remote switch box according to an embodiment of the safety locking system of FIG. 1 .
3 is a block diagram schematically illustrating a configuration of a blocking device according to an embodiment of the safety locking system of FIG. 1 .
4 is a table showing a comparison result of the work required time of the prior art and the present embodiment.
5 is a block diagram schematically illustrating a configuration of a blocking device according to another embodiment of the safety locking system of FIG. 1 .
6 is an exemplary view of a safety lock system according to another embodiment of the present invention.
7 is an exemplary view applying the safety locking system of FIG. 6 to a sheet metal line.
8 is an exemplary view of a safety lock system according to another embodiment of the present invention.
9 is a block diagram schematically illustrating a configuration of a blocking device according to an embodiment of the safety locking system of FIG. 8 .
10 is an exemplary view of a safety lock system according to another embodiment of the present invention.
11 is an exemplary view for explaining an operation procedure of the safety lock system of FIG. 10 .
12 to 14 are flowcharts for explaining an operation method of the safety lock system according to the present embodiment.

Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the detailed description in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments presented below, it can be implemented in a variety of different forms, and should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. . The embodiments presented below are provided so that the disclosure of the present invention is complete, and to completely inform those of ordinary skill in the art to which the present invention pertains to the scope of the invention. In describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof. Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

Also, in this application, “unit” may be a hardware component such as a processor or circuit, and/or a software component executed by a hardware component such as a processor.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. decide to do

1 is an exemplary diagram of a safety locking system according to an embodiment of the present invention, and FIG. 2 is a diagram schematically illustrating a lockable remote switch box according to an embodiment of the safety locking system of FIG. 1 . 1 and 2 , the safety locking system 1 according to an embodiment may include a lockable remote switch box 100 and a blocking device 200 .

The lockable remote switch box 100 may be installed around a facility capable of shutting off an energy source (electricity, pneumatic, hydraulic, etc.) within the work space. Here, the energy source may include all hazardous energy that can harm workers and personnel residing nearby, for example, a chemical substance, an electrical substance, a form of hydraulic operation, a machine It may include an electrical type, a high-pressure air type, an electrical type, and other energy. Also, the vicinity of the facility capable of blocking the energy source may include a blocking point capable of blocking the energy source. For example, a cut-off point for a sheet metal line may include a press, robot, scrap conveyor, input/discharge, die change, and the like.

One or more lockable remote switch boxes 100 may be installed depending on the configuration type. For example, in order to control the energy source of an entire working space, the first lockable remote switch box 100_1 may be installed at one blocking point. As another example, a first lockable remote switch box 100_1 and a second lockable remote switch box 100_2 are installed at two blocking points to control each energy source by dividing a work space into two. can As another example, in order to establish an energy source supplied to each of 50 robots installed on an arbitrary sheet metal line, first to 50th lockable remote switch boxes 100_1 to 100_50 may be installed.

In this embodiment, the lockable remote switch box 100 may include a rotary switch 110 , a lock 120 , and a lamp 130 .

The rotary switch 110 may be operated by an operator to cut off the energy source of the work space in which the lockable remote switch box 100 is installed. When the rotary switch 110 is operated in an on state, a blocking request signal for the energy source may be generated and transmitted to the blocking device 200 .

The lock 120 may be installed by an operator to prevent a change in operation of the rotary switch 110 . The state of the rotary switch 110 can be changed only when the lock 120 is released.

The lamp 130 may be turned on when a verification completion signal is received from the blocking device 200 . Here, the verification completion signal includes a signal indicating that the blocking device 200 that has received the blocking request signal blocks the energy source of the blocking point, verifies whether the energy source is completely blocked, and indicates that the energy source has been safely blocked. can do.

The blocking device 200 may be electrically connected to the lockable remote switch box 100 . Here, being electrically connected may include that the lockable remote switch box 100 and the blocking device 200 are connected by electrical wiring.

The blocking device 200 may receive a blocking request signal for the energy source of the blocking point from the lockable remote switch box 100 , and may block the energy source in response to the reception of the blocking request signal.

After blocking the energy source, the blocking device 200 may verify whether the blocking of the energy source is completed, and may output a verification completion signal to the lockable remote switch box 100 as the energy source is blocked by the verification.

3 is a block diagram schematically illustrating a configuration of a blocking device according to an embodiment of the safety locking system of FIG. 1 . In the following description, descriptions of parts overlapping with those of FIGS. 1 and 2 will be omitted. Referring to FIG. 3 , the blocking device 200 may include a communication unit 210 , a blocking unit 220 , a verification unit 230 , a storage unit 240 , and a control unit 250 .

The communication unit 210 interworks with the network (400 in FIG. 5 ) to provide a communication interface necessary to provide a transmission/reception signal between the blocking device 200 and an external device (the management device 300 in FIG. 5 ) in the form of packet data. can Also, the communication unit 210 may transmit a predetermined information request signal to an external device and receive response data processed by the external device. In addition, the communication unit 210 may be a device including hardware and software necessary for transmitting and receiving signals such as control signals or data signals through wired/wireless connection with other network devices. In addition, the communication unit 210 may support various things intelligent communication (Internet of things (IoT), Internet of everything (IoE), Internet of small things (IoST), etc.), and M2M (machine to machine) communication, V2X ( Vehicle to everything communication) communication, D2D (device to device) communication, etc. may be supported.

The blocking unit 220 may block the corresponding energy source in response to a blocking request signal for the energy source received from the lockable remote switch box 100 . In one embodiment, the blocking unit 220 may be connected to a line that supplies energy to a factory, process, machine or equipment group in the work space, that is, a blocking point, and prevents energy from being supplied to the blocking point when a blocking request signal is received. can be blocked

The verification unit 230 may verify whether the blocking of the energy source is completed after the blocking unit 220 blocks the energy source. The verification unit 230 transmits a voltage verification check signal to the blocking point in order to verify whether the blocking of the energy source has been completed and may verify whether the blocking of the energy source is completed using the received voltage verification response signal. In an embodiment, the verification unit 230 may include a voltage monitoring relay for monitoring the voltage of the energy source, a pressure monitoring device for monitoring the pressure of the energy source, and the like.

The verification unit 230 may generate a verification completion signal indicating that the energy source is safely cut off when the voltage level included in the voltage verification response signal is less than a preset reference value.

The verification completion signal generated by the verification unit 230 may be transmitted to the lockable remote switch box 100 to light the lamp 130 . Only when the lamp 130 is turned on, the operator can enter the work space and start the facility maintenance work.

However, when the voltage level included in the voltage verification response signal is greater than or equal to a preset reference value, the verification unit 230 does not generate the verification completion signal, and accordingly, the lamp 130 cannot be turned on. If the lamp 1300 is not turned on, the operator cannot enter the work space.

In this embodiment, the blocking request signal generated in the lockable remote switch box 100 is transmitted to the blocking device 200 through the first channel, and the verification completion signal generated by the blocking device 200 is the second channel. through the lockable remote switch box 100 .

When the block request signal is received from the lockable remote switch box 100, the storage unit 240 receives identification information indicating whether it is the lockable remote switch box 100 to block any energy source, and receives the block request signal. You can save the date and time. In addition, the storage unit 240 transmits the voltage verification check signal generated by the verification unit 230 , the time it receives the voltage verification response signal, and generates a verification completion signal to the lockable remote switch box 100 . Transmission time, etc. can be stored. In addition, information processed and controlled by the controller 250 may be stored in the storage unit 240 .

The controller 250 may control the overall operation of the safety lock system 1 . The control unit 250 may control the blocking and release of the blocking of the energy source connected to the blocking device 200 according to the blocking request signal from the lockable remote switch box 100 .

In addition, the control unit 250 may control generation of a voltage verification check signal, generation of a verification completion signal according to reception of a voltage verification response signal, and control transmission to the lockable remote switch box 100 .

The control unit 250 may control to transmit information stored in the storage unit 240 to the external device through the communication unit 210 at the request of the external device.

4 is a table showing a comparison result of the work required time of the prior art and the present embodiment. In the following description, descriptions of parts overlapping with those of FIGS. 1 to 3 will be omitted.

Referring to FIG. 4, in the case of the work required according to the prior art, the time required to confirm the work safety work permit suitable for the facility and work is about 5 minutes, and the LOTO implementation and maintenance work for the relevant personnel (operators and managers) It takes about 3 minutes to notify the power source, about 10 minutes to identify the cutoff location of the energy source that needs to be shut off, about 5 minutes to stop the facility normally, and block and verify each energy source. It takes about 30 minutes to complete and 20 minutes to execute Lockout and Tagout, which takes about 73 minutes before the actual operation is performed.

On the other hand, in the present embodiment, the time required to determine the cutoff position of the energy source that needs to be cut off is reduced from 10 minutes in the prior art to 3 minutes. It transmits a blocking request signal to the blocking device 200 using the lockable remote switch box 100, and only time to check which energy source is the lockable remote switch box 100 from which the blocking device 200 will block This is due to the need

In addition, in the case of this embodiment, the time required for each energy blocking and verification is reduced from 30 minutes in the prior art to 5 minutes. This is due to the fact that it takes only time for the blocking device 200 to verify whether the energy source is safely blocked.

In addition, in the case of this embodiment, the time required to execute lockout and tagout is reduced from 20 minutes in the prior art to 5 minutes. This is not the time it took for the operator to individually check the lockout and tagout execution in the conventional case, but the time the operator installs the lock (and sign) (LOTO) after the lockable remote switch box 100 generates a blocking request signal This is because it takes only

Due to this reduction in time, it can be seen that in the present embodiment, it takes about 26 minutes before the actual operation is performed, and in the case of recovery, it takes about 26 minutes as well. Therefore, comparing the conventional 76 minutes with the 26 minutes of the present embodiment, it can be seen that the required time is significantly reduced in the present embodiment.

5 is a block diagram schematically illustrating a configuration of a blocking device according to another embodiment of the safety locking system of FIG. 1 . In the following description, descriptions of parts overlapping with those of FIGS. 1 to 4 will be omitted. Referring to FIG. 5 , the blocking device 200 according to another embodiment may include a processor 260 and a memory 270 .

In this embodiment, the processor 260 is performed by the blocking device 200 including the communication unit 210, the blocking unit 220, the verification unit 230, the storage unit 240, and the control unit 250 of FIG. function can be processed.

The processor 260 may control the overall operation of the blocking device 200 . Here, the 'processor' may refer to a data processing device embedded in hardware having a physically structured circuit to perform a function expressed by, for example, a code or an instruction included in a program. As an example of the data processing apparatus embedded in the hardware as described above, a microprocessor, a central processing unit (CPU), a processor core, a multiprocessor, an application-specific integrated (ASIC) circuit) and a processing device such as a field programmable gate array (FPGA), but the scope of the present invention is not limited thereto.

The memory 270 may be operatively connected to the processor 260 and store at least one code in association with an operation performed by the processor 260 .

In addition, the memory 270 may perform a function of temporarily or permanently storing data processed by the processor 260 . Here, the memory 270 may include magnetic storage media or flash storage media, but the scope of the present invention is not limited thereto. Such memory 270 may include internal memory and/or external memory, and may include volatile memory such as DRAM, SRAM, or SDRAM, one time programmable ROM (OTPROM), PROM, EPROM, EEPROM, mask ROM, flash ROM, NAND flash memory, or non-volatile memory such as NOR flash memory, SSD, compact flash (CF) card, SD card, Micro-SD card, Mini-SD card, Xd card, or flash drive such as a memory stick , or a storage device such as HDD.

6 is an exemplary view of a safety lock system according to another embodiment of the present invention. In the following description, descriptions of parts overlapping with those of FIGS. 1 to 5 will be omitted. Referring to FIG. 6 , the safety locking system 2 according to another embodiment may include a lockable remote switch box 100 , a blocking device 200 , a management device 300 , and a network 400 . Here, since the contents of the lockable remote switch box 100 and the blocking device 200 are the same as those described above, they will be omitted.

The management device 300 may establish a safe work plan, review a safe work permit, and approve the work section after inspection. The management device 300 may include an electronic device used by a maintenance team and a safety team.

In addition, the management device 300 may include an electronic device for monitoring the production line of the work space. The management device 300 may perform real-time diagnosis and monitoring of the energy source cut-off state until the maintenance work is completed in the work space. In addition, unintended operation and input of energy sources during maintenance can be monitored in real time.

The management device 300 may access the blocking device 200 through the network 400 to receive energy source blocking history information stored in the storage unit 240 of the blocking device 200 . Here, the energy source cut-off history information includes time information of receiving a cut-off request signal from the lockable remote switch box 100, identification information of the locking-type remote switch box 100 requested to be cut off, and a voltage verification check signal received It may include a time, a time at which the voltage verification response signal is transmitted, and a time at which the verification complete signal is generated (lamp lighting time), and the like.

The management device 300 may predict the maintenance/repair cycle of the work space or the lifespan of the equipment by using the energy source blocking history information received from the blocking device 200 .

In this embodiment, the management device 300 may store or include a neural network model to which artificial intelligence technology is applied in order to predict a maintenance/repair cycle of a work space or predict a lifespan of equipment. For example, the neural network model to which the artificial intelligence technology is applied may be various learning models, such as a recurrent neural network, a convolutional neural network, an adversarial generative neural network, or other types of machine learning models.

Here, artificial intelligence (AI) is a field of computer science and information technology that studies how computers can do the thinking, learning, and self-development that can be done with human intelligence. It could mean making it possible to imitate intelligent behavior.

In addition, artificial intelligence does not exist by itself, but is directly or indirectly related to other fields of computer science. In particular, in modern times, attempts are being made to introduce artificial intelligence elements in various fields of information technology and use them to solve problems in that field.

Machine learning is a branch of artificial intelligence, which can include fields of study that give computers the ability to learn without explicit programming. Specifically, machine learning can be said to be a technology to study and build a system and algorithms for learning based on empirical data, making predictions, and improving its own performance. Algorithms in machine learning can take the approach of building specific models to make predictions or decisions based on input data, rather than executing rigidly set static program instructions.

As a machine learning method of such an artificial neural network, both unsupervised learning and supervised learning can be used. In addition, deep learning technology, which is a type of machine learning, can learn by going down to a deep level in multiple stages based on data. Deep learning can represent a set of machine learning algorithms that extract core data from a plurality of data as the level increases.

The management device 300 may predict the maintenance/maintenance cycle of the workspace using the first deep neural network model trained in advance to predict the maintenance/repair cycle of the workspace by using the energy source blocking history information. In addition, the management device 300 may predict the lifespan of the equipment using the second deep neural network model trained in advance to predict the lifespan of the equipment by using the energy source blocking history information.

The network 400 may serve to connect the blocking device 200 and the management device 300 . The network 400 is, for example, a wired network such as local area networks (LANs), wide area networks (WANs), metropolitan area networks (MANs), and integrated service digital networks (ISDNs), wireless LANs, CDMA, Bluetooth, and satellite communication. It may cover a wireless network such as, but the scope of the present invention is not limited thereto. Also, the network 400 may transmit/receive information using short-distance communication and/or long-distance communication. Here, the short-distance communication may include Bluetooth, radio frequency identification (RFID), infrared data association (IrDA), ultra-wideband (UWB), ZigBee, and wireless fidelity (Wi-Fi) technologies. Communication may include code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA) technology. can

Network 400 may include connections of network elements such as hubs, bridges, routers, switches, and gateways. Network 400 may include one or more connected networks, eg, multiple network environments, including public networks such as the Internet and private networks such as secure enterprise private networks. Access to network 400 may be provided via one or more wired or wireless access networks. Furthermore, the network 400 may support an Internet of Things (IoT) network and/or 5G communication that exchanges and processes information between distributed components such as things.

7 is an exemplary view applying the safety locking system of FIG. 6 to a sheet metal line. In the following description, descriptions of parts overlapping with those of FIGS. 1 to 6 will be omitted.

Referring to FIG. 7 , a first lockable remote switch box 100_1 to a fifth lockable remote switch box 100_5 may be installed at the doorway to block the operation of the robot during maintenance on the sheet metal line. The first lockable remote switch box 100_1 to the fifth lockable remote switch box 100_5 may be electrically connected to the blocking device 200 . Also, the blocking device 200 may be connected to the management device 300 through the network 400 .

The blocking request signal generated by the operator in the first lockable remote switch box 100_1 to the fifth lockable remote switch box 100_5 is transmitted to the blocking device 200, and the operator may perform Logout and Tagout.

The blocking device 200 may block all energy sources (main power, pneumatic, hydraulic) of the sheet metal line in response to the blocking request signal. The blocking device 200 verifies whether all energy sources have been shut off, and as all energy sources are cut off by the verification, the first lockable remote switch box 100_1 to the fifth lockable remote switch box 100_5 The lamp can be turned on by transmitting a verification completion signal. When the lamp is lit, the operator can go inside and perform maintenance work.

The management device 300 may communicate with the blocking device 200 to check in real time for unintended operation and input of energy sources during maintenance. The management device 300 may request the blocking device 200 to periodically verify whether the blocking of the energy source is completed, and the blocking device 200 may verify whether the blocking of the energy source is completed in response thereto.

In addition, a switch box may be further provided to apply a function of preventing arbitrary entry and exit without blocking the energy source during maintenance in conjunction with the interlock lock function.

8 is an exemplary view of a safety lock system according to another embodiment of the present invention. In the following description, descriptions of parts overlapping with those of FIGS. 1 to 7 will be omitted. Referring to FIG. 8 , the safety lock system 3 according to another embodiment may include a lockable remote key box 500 , an RFID key 600 , and a blocking device 200 .

The lockable remote key box 500 may be installed around a facility that can shut off an energy source (electrical, pneumatic, hydraulic, etc.) within the work space.

The RFID key 600 may be provided to a worker who is permitted to work on the corresponding work space. The RFID key 600 may store RFID identification information, and tag-out information including the paid worker's personal information, the number of workers, the type of work, the work location, and the work time. In this embodiment, the blocking device 200 may have the same information as the RFID key 600 pre-stored.

When the RFID key 600 provided to the authorized worker is input to the lockable remote key box 500 , the first RFID key input signal may be transmitted to the blocking device 200 .

The blocking device 200 may block the energy source according to a result of comparison between the first RFID key information included in the first RFID key signal received from the lockable remote key box 500 and the pre-stored RFID key information.

After blocking the energy source, the blocking device 200 verifies whether the blocking of the energy source is completed, and as the energy source is blocked by the verification, the display unit (290 in FIG. 9 ) included in the blocking device 200 and/ Alternatively, the verification completion signal can be output to the production line electronic display included in the work space.

In addition, the blocking device 200 may output the above-described tag-out information to the display unit ( 290 in FIG. 9 ) and/or to the production line electronic display board included in the work space.

In an optional embodiment, the lockable remote key box 500 may further include a lamp (not shown) in the box. The lamp may be turned on when a verification complete signal is received from the blocking device 200 .

After the energy source is cut off and the operation is completed, the blocking device 200 compares the second RFID key information included in the second RFID key signal received from the lockable remote key box 500 with the pre-stored RFID key information. Depending on the result, the energy source can be unblocked.

In this embodiment, the blocking device 200 may receive the first RFID key signal from the lockable remote key box 500 before the operation, and receive the second RFID key signal from the lockable remote key box 500 after the operation. can receive Here, the stored contents of the first RFID signal and the second RFID signal may be the same except for a time difference such as before and after the operation.

The difference between the lockable remote key box 500 according to the present embodiment and the lockable remote switch box 100 shown in FIG. 1 is as follows.

First, since the locking remote switch box 100 generates a blocking request signal by operation of the rotary switch 110, anyone can operate it to block the energy source, but the lockable remote key box 500 is the RFID key 600 ), since the energy source is blocked only when the RFID information included in the input signal and the stored RFID information match, only an authorized worker can block the energy source.

Next, the lockable remote switch box 100 needs to perform lockout and tagout using the lock 120 , but the lockable remote key box 500 uses the RFID information included in the input signal of the RFID key 600 and If the pre-stored RFID information matches, the energy source is cut off and a lockout and tagout completion signal is generated, so there is no need to perform lockout and tagout, which provides convenience to the operator.

9 is a block diagram schematically illustrating a configuration of a blocking device according to an embodiment of the safety locking system of FIG. 8 . In the following description, descriptions of parts overlapping with those of FIGS. 1 to 8 will be omitted. Referring to FIG. 9 , the blocking device 200 includes a communication unit 210 , a blocking unit 220 , a verification unit 230 , a storage unit 240 , a control unit 250 , a processing unit 280 , and a display unit 290 . may include.

The communication unit 210 interworks with the network (400 in FIG. 10) to provide a communication interface necessary to provide a transmission/reception signal between the blocking device 200 and an external device (management device 300 in FIG. 10) in the form of packet data. can Hereinafter, the description of the communication unit 210 is the same as that of FIG. 3 and thus will be omitted.

The blocking unit 220 may block the corresponding energy source as the first RFID information included in the first RFID key input signal received from the lockable remote key box 500 matches the RFID information stored in the storage unit 240 . have.

The verification unit 230 may verify whether the blocking of the energy source is completed after the blocking unit 220 blocks the energy source. The verification unit 230 transmits a voltage verification check signal to the blocking point in order to verify whether the blocking of the energy source has been completed and may verify whether the blocking of the energy source is completed using the received voltage verification response signal. The verification unit 230 may generate a verification completion signal indicating that the energy source is safely cut off when the voltage level included in the voltage verification response signal is less than a preset reference value.

The verification completion signal generated by the verification unit 230 may be output to the display unit 290 and/or a production line electric sign included in the work space.

The storage unit 240 may store identification information and tag-out information related to the RFID key 600 provided to the worker. In addition, the storage unit 240 may store information about the time when the RFID key input signal is received from the lockable remote key box 500 , information about the time when the energy source is blocked, and the like. In addition, information processed and controlled by the controller 250 may be stored in the storage unit 240 .

The processing unit 280 may extract RFID information from the RFID key input signal received from the lockable remote key box 500 and generate a comparison result with the RFID information stored in the storage unit 240 . Also, the processing unit 280 may distinguish whether the RFID key input signal is the first RFID key input signal or the second RFID key input signal according to the reception time of the RFID key input signal received from the lockable remote key box 500 .

The processing unit 280 may transmit a result of comparing the second RFID information extracted from the second RFID key input signal received from the lockable remote key box 500 with the RFID information stored in the storage unit 240 to the control unit 250 . and the control unit 250 may release the blocking of the energy source based on the comparison result.

The display unit 290, under the control of the control unit 250, compares the first RFID information extracted from the first RFID key input signal and the RFID information stored in the storage unit 240 to match the result of the comparison, so that the energy source blocking and tag-out information can be displayed. Also, the display unit 290 may display a result of generating the verification completion signal. In addition, under the control of the controller 250 , the display unit 290 compares the second RFID information extracted from the second RFID key input signal and the RFID information stored in the storage unit 240 to match the result of the comparison of the RFID information stored in the storage unit 240 , thereby canceling the blocking of the energy source and Job completion information can be displayed.

The controller 250 may control the overall operation of the safety lock system 3 . The control unit 250 compares the RFID information included in the RFID key input signal from the lockable remote key box 500 with the RFID information stored in the storage unit 240 to control the blocking and unblocking of the energy source. .

Also, the controller 250 may control generation and display of the verification completion signal. In addition, the control unit 250 may control the energy source blocking and tag-out information to be displayed, and the generation result of the verification completion signal (eg, text indicating that the energy source is safely blocked, etc.) may be controlled to be displayed, It is possible to control the display of the energy source blocking release and work end information.

The controller 250 may control to transmit the information stored in the storage 240 to the external device through the communication unit 210 at the request of the external device (the management device 300 of FIG. 10 ).

In an optional embodiment, the blocking device 200 may include a processor 260 and a memory 270 as shown in FIG. 5 .

In this embodiment, the processor 260 includes the communication unit 210, the blocking unit 220, the verification unit 230, the storage unit 240, the control unit 250, the processing units 280 and 290 of FIG. It is possible to process the function performed by the blocking device 200 . The processor 260 may control the overall operation of the blocking device 200 .

The memory 270 may be operatively connected to the processor 260 and store at least one code in association with an operation performed by the processor 260 . In addition, the memory 270 may perform a function of temporarily or permanently storing data processed by the processor 260 .

10 is an exemplary view of a safety lock system according to another embodiment of the present invention. In the following description, descriptions of parts overlapping with those of FIGS. 1 to 9 will be omitted. Referring to FIG. 10 , the safety lock system 4 according to another embodiment includes a lockable remote key box 500 , an RFID key 600 , a blocking device 200 , a management device 300 , and a network 400 . may include. Here, since the contents of the lockable remote key box 500 and the blocking device 200 are the same as those described above, they will be omitted.

The management device 300 may establish a safe work plan, review a safe work permit, and approve the work section after inspection. The management device 300 may include an electronic device used by a maintenance team and a safety team. The management device 300 may cause the RFID key 600 to be provided to authorized working personnel. The management device 300 may store identification information and tag-out information in the RFID key 600 to be paid to an authorized worker.

In addition, the management device 300 may include an electronic device for monitoring the production line of the work space. The management device 300 may perform real-time diagnosis and monitoring of the energy source cut-off state until the maintenance work is completed in the work space. In addition, unintended operation and input of energy sources during maintenance can be monitored in real time.

When the first RFID information and the stored RFID information match, the management device 300 compares the time counted after the generation of the lockout and tagout completion signals generated while the energy source is blocked and the working time on the safety work permit Accordingly, when the counted time exceeds the working time, alarm information may be generated and transmitted to the operator's terminal (eg, a smart phone, etc.) through the network 400 . The worker who receives the alarm information through his/her terminal may recognize that the work time has been exceeded and exit from the work space.

Also, the management device 300 may access the blocking device 200 through the network 400 to receive energy source blocking history information stored in the storage unit 240 of the blocking device 200 . Here, the energy source blocking history information includes information on the date and time of receiving the first and second lockable RFID input signals from the lockable remote key box 500, identification information of the lockable remote key box 500 requested to be blocked, It may include a time when the voltage verification check signal is received, a time when the voltage verification response signal is transmitted, a time when the verification complete signal is generated, a time when the energy block is released, and the like.

The management device 300 may predict the maintenance/repair cycle of the work space or the lifespan of the equipment by using the energy source blocking history information received from the blocking device 200 . In this embodiment, the management device 300 may store or include a neural network model to which artificial intelligence technology is applied in order to predict a maintenance/repair cycle of a work space or predict a lifespan of equipment.

The management device 300 may predict the maintenance/maintenance cycle of the workspace using the first deep neural network model trained in advance to predict the maintenance/repair cycle of the workspace by using the energy source blocking history information. In addition, the management device 300 may predict the lifespan of the equipment using a second deep neural network model trained in advance to predict the lifespan of the equipment by using the energy source blocking history information.

The network 400 may serve to connect the blocking device 200 and the management device 300 . Hereinafter, the description of the network 400 is the same as that described above, and thus will be omitted.

11 is an exemplary view for explaining an operation procedure of the safety lock system of FIG. 10 . In the following description, descriptions of parts overlapping with those of FIGS. 1 to 10 will be omitted.

Referring to FIG. 11 , the management device 300 performs work permit and approval, registers work personnel and information when permitting on-site safety work, registers a work location and time, and provides an RFID key 600 to the work personnel. can pay

When all workers input the RFID key 600 into the lockable remote key box 500, the blocking device 200 compares the RFID information included in the input signal of the RFID key 600 with the pre-stored RFID information. Accordingly, the energy source may be cut off, and a lockout and tagout completion signal may be transmitted to the management device 300 .

When the RFID keys 600 of all pre-approved workers are recognized and the lockout and tagout completion signals are transmitted, the tagout information is displayed on the display unit 290 of the blocking device 200 and the electronic display board of the production line to determine who is doing what Able to know. By automatically displaying the tagout information during operation, it is possible to prevent errors due to arbitrary access and manipulation by omitting the tagout.

After completion of the work, all working personnel input the RFID key 600 into the lockable remote key box 500 , and the blocking device 200 transmits the RFID information included in the input signal of the RFID key 600 and the pre-stored RFID information. According to the comparison match, the energy source can be unblocked and the task can be completed.

12 is a flowchart illustrating a method of operating a safety lock system according to an embodiment of the present invention. In the following description, descriptions of parts overlapping with those of FIGS. 1 to 11 will be omitted. In this embodiment, the safety locking system may include a lockable remote switch box 100 and a blocking device 200 , and the operation method of the safety locking system is blocked with the help of the lockable remote switch box 100 . It may be executed by a software module stored in the device 200 .

12 , in step S1210, the blocking device 200 may receive a blocking request signal for the energy source from the lockable remote switch box 100 installed around the facility capable of blocking the energy source in the work space. have. In this embodiment, the lockable remote switch box 100 may include a rotary switch 110 , a lock 120 and a lamp 130 , and an operation of the rotary switch 110 may generate a blocking request signal. have.

In step S1220 , the blocking device 200 may block the energy source in response to the reception of the blocking request signal received from the lockable remote switch box 100 .

In step S1230, the blocking device 200 may verify whether the blocking of the energy source is completed. The blocking device 200 may transmit a voltage verification check signal to the blocking point to verify whether the blocking of the energy source is completed and verify whether the blocking of the energy source is completed using the received voltage verification response signal. For example, when the voltage level included in the voltage verification response signal is less than a preset reference value, the blocking device 200 may generate a verification completion signal indicating that the energy source is safely cut off.

In step S1240 , the blocking device 200 may output a verification completion signal to the lockable remote switch box 100 as the energy source is blocked by verification. In this embodiment, the lamp 130 may be turned on by the verification completion signal.

13 is a flowchart for explaining a method of operating a safety lock system according to another embodiment of the present invention. In the following description, a description of portions overlapping with those of FIGS. 1 to 12 will be omitted. In this embodiment, the safety lock system may include a lockable remote key box 500 , an RFID key 600 and a blocking device 200 , and the operation method of the safety lock system is a lockable remote key box 500 . ) and with the aid of the RFID key 600 , it can be executed by a software module stored in the blocking device 200 .

In step S1310, the blocking device 200 receives the first RFID key input signal by the input of the RFID key 600 from the lockable remote key box 500 installed around the facility that can block the energy source in the work space. can do.

In step S1320 , the blocking device 200 may block the energy source according to a result of comparing the RFID key information included in the received first RFID key signal with the pre-stored RFID key information.

In step S1330, when the energy source is cut off, the blocking device 200 may display tag-out information on the display unit and the electric sign board of the corresponding production line. Here, the tag-out information may include the personal information of the worker, the number of workers, the type of work, the work location, and the work time stored in the RFID key 600 .

In step S1340 , the blocking device 200 may receive the second RFID key input signal from the lockable remote key box 500 .

In step S1350, the blocking device 200 releases the blocking of the energy source and determines the end of the operation according to the comparison result of the second RFID key information included in the received second RFID key signal and the pre-stored RFID key information. can do.

14 is a flowchart for explaining a method of operating a safety lock system according to another embodiment of the present invention. In the following description, parts overlapping with those of FIGS. 1 to 13 will be omitted. In this embodiment, the safety lock system may include a lockable remote key box 500 , an RFID key 600 and a blocking device 200 , and the operation method of the safety lock system is a lockable remote key box 500 . ) and with the aid of the RFID key 600 , it can be executed by a software module stored in the blocking device 200 . In addition, the lockable remote key box 500 may further include a lamp (not shown) as shown in FIG. 2 .

In step S1410, the blocking device 200 receives the first RFID key input signal by the input of the RFID key 600 from the lockable remote key box 500 installed around the facility that can block the energy source in the work space. can do.

In step S1420 , the blocking device 200 may block the energy source according to a result of comparison between the RFID key information included in the received first RFID key signal and the pre-stored RFID key information.

In step S1430, the blocking device 200 may verify whether the blocking of the energy source has been completed. The blocking device 200 may transmit a voltage verification check signal to the blocking point to verify whether the blocking of the energy source is completed and verify whether the blocking of the energy source is completed using the received voltage verification response signal. For example, when the voltage level included in the voltage verification response signal is less than a preset reference value, the blocking device 200 may generate a verification completion signal indicating that the energy source is safely cut off.

In step S1450, the blocking device 200 may display the tag-out information on the display unit and the electronic sign board of the corresponding production line as the energy source is blocked by verification. Here, the tag-out information may include the personal information of the operator, the number of workers, the type of work, the work location, and the work time stored in the RFID key 600 .

In an optional embodiment, the blocking device 200 may output a verification completion signal to the lockable remote key box 500 as the energy source is blocked by verification. In this embodiment, the lamp may be turned on by the verification completion signal.

In step S1460 , the blocking device 200 may receive the second RFID key input signal from the lockable remote key box 500 .

In step S1470, the blocking device 200 releases the blocking of the energy source and determines the end of the operation according to the comparison result of the second RFID key information included in the received second RFID key signal and the previously stored RFID key information. can do.

The above-described embodiment according to the present invention may be implemented in the form of a computer program that can be executed through various components on a computer, and such a computer program may be recorded in a computer-readable medium. In this case, the medium includes a hard disk, a magnetic medium such as a floppy disk and a magnetic tape, an optical recording medium such as CD-ROM and DVD, a magneto-optical medium such as a floppy disk, and a ROM , RAM, flash memory, etc., a hardware device specially configured to store and execute program instructions.

Meanwhile, the computer program may be specially designed and configured for the present invention, or may be known and used by those skilled in the computer software field. Examples of the computer program may include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

In the specification of the present invention (especially in the claims), the use of the term "above" and similar referential terms may be used in both the singular and the plural. In addition, when a range is described in the present invention, each individual value constituting the range is described in the detailed description of the invention as including the invention to which individual values belonging to the range are applied (unless there is a description to the contrary). same as

The steps constituting the method according to the present invention may be performed in an appropriate order unless the order is explicitly stated or there is no description to the contrary. The present invention is not necessarily limited to the order in which the steps are described. The use of all examples or exemplary terms (eg, etc.) in the present invention is merely for the purpose of describing the present invention in detail, and the scope of the present invention is limited by the examples or exemplary terms unless limited by the claims. it's not going to be In addition, those skilled in the art will recognize that various modifications, combinations, and changes can be made in accordance with design conditions and factors within the scope of the appended claims or their equivalents.

Therefore, the spirit of the present invention should not be limited to the above-described embodiments, and the scope of the spirit of the present invention is not limited to the scope of the scope of the present invention. will be said to belong to

100: lockable remote switch box
200: blocking device
300: management device
400: network
500: lockable remote key box
600: RFID key

Claims (5)

A safety locking system comprising:
a lockable remote switch box installed around the facility to shut off the energy source within the work area; and
a disconnect device electrically connected to the lockable remote switch box;
The blocking device is
processor; and
a memory operatively coupled to the processor and storing at least one code executed by the processor;
the memory, when executed through the processor, when the processor receives a shut-off request signal for the energy source from the lockable remote switch box;
In response to receiving the blocking request signal, cut off the energy source,
Verifies whether the blocking of the energy source has been completed,
storing a code causing to output a verification completion signal to the lockable remote switch box as the energy source is cut off by the verification;
safety lock system. The method of claim 1,
The blocking request signal is
generated by operation of a rotary switch included in the lockable remote switch box,
The verification completion signal is
Turning on the lamp included in the lockable remote switch box,
safety lock system. delete delete delete

Images