JP2018156232A - Production management device, production management system and production management method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To aim at improvement of the production efficiency of manufacturing line by easily identifying via video the events that do not lead to stop of the production line.SOLUTION: A production management device 10 is provided to manage the manufacturing status of the production line. The production management device 10 includes imaging devices 41, 42 for taking images of a production status on production lines L1, L2, detecting devices 20a, 20b, 20c outputting detection signals every time products are sent out from the production lines L1, L2, and image storing execution units P1, 11 retroactively storing images taken by the imaging devices 41, 42 in the memory device 12 when the detection signals output from the detecting devices 20a, 20b, 20c are not input with predetermined intervals.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a production management apparatus, a production management system, and a production management method for managing production status in a production line.

  There is known a technique for photographing the operating state of a production line using a camera and recording the stoppage of equipment and work. In addition, a technique is known in which video data that has been traced back in the past for a set time or more after production equipment or work stoppage is stored as video data that cannot be overwritten (for example, Patent Document 1).

JP 2006-122319 A

  However, in the conventional production management technology, video data is stored triggered by the stop of production equipment or work, and detection of an event that does not result in production stoppage such as malfunction or failure of the production equipment, and production stoppage does not occur. Storage of video triggered by an event was not expected. As a result, for example, to identify and verify delays caused by malfunctions or malfunctions in production facilities and factors that reduce production efficiency of the production line using images, it is necessary to verify all images, which is an easy task. It wasn't.

  The present disclosure has been made in order to solve the above-described problem, and an object thereof is to easily identify an event that does not lead to a stop of a production line by a video and to improve production efficiency of the production line.

  In order to solve at least a part of the above problems, the present disclosure adopts the following various aspects.

  A 1st aspect provides the production management apparatus for managing the production condition of a manufacturing line. The production management device according to the first aspect includes a photographing device for photographing a production status in the production line, a detection device that outputs a detection signal every time a product is fed from the production line, and an output from the detection device. A video storage execution unit that retroactively stores the video captured by the imaging device in a storage device when the detected signal is not input at a predetermined interval.

  According to the production management device according to the first aspect, when the detection signal output from the detection device is not input at a predetermined interval, the video captured by the imaging device is stored retroactively. It is possible to easily identify an event that does not result in a stoppage by video and improve the production efficiency of the production line.

  In the production management device according to the first aspect, the video storage execution unit may store the video in the storage device retroactively to the time when the detection signal was last input. In this case, an image from the time of determination to the time when the detection signal was last input can be stored.

  In the production management device according to the first aspect, the video storage execution unit may store the video in the storage device retroactively for a predetermined period. In this case, an image for a predetermined period from the determination can be stored.

  In the production management device according to the first aspect, the imaging device may be arranged corresponding to at least one of a place where work is performed in the production line and a production facility arranged in the production line. good. In this case, an event that does not lead to the stop of the production line in at least one of the place where the work is performed and the production facility can be specified by the video.

  In the production management device according to the first aspect, the storage device includes a photographic video recording unit in which the video is overwritten when the recording capacity is exceeded, and a stored video recording unit that is a recording unit different from the photographic video recording unit The video storage executing unit may store the video stored retroactively in the stored video recording unit. In this case, the video stored retroactively is stored even if the recording capacity of the captured video recording unit is exceeded.

  In the production management device according to the first aspect, the video storage execution unit overwrites and records the video when the recording capacity is exceeded, and the video stored retroactively is stored in the storage device incapable of being overwritten. In this case, even if the recording capacity is exceeded, the video stored retroactively is stored without being overwritten.

  In the production management device according to the first aspect, the video storage execution unit stores the video stored retroactively and the time when it is determined that the detection signal is not input at the predetermined interval. May be. In this case, it is possible to easily search for a stored video indicating an event in which the detection signal is not input at a predetermined interval.

  In the production management device according to the first aspect, the detection device may be attached to the production facility arranged on the production line as a retrofit or arranged near the production facility. In this case, the detection device can be mounted regardless of the production equipment.

  The production management device according to the first aspect may further include an output device that outputs the stored video to an external device at a timing when it is determined that the detection signal is not input at a predetermined interval. good. In this case, an event that does not lead to the stop of the production line can be immediately output to an external device.

  The second aspect provides a production management system for managing the production status of the production line. A production management system according to a second aspect includes the production management apparatus according to the first aspect, and a terminal device that receives the stored video output from the production management apparatus. According to the production management system concerning the 2nd mode, the same advantage as the production management device concerning the 1st mode can be acquired.

  A 3rd aspect provides the production management method for managing the production condition of a manufacturing line. In the production management method according to the third aspect, the production status in the production line is photographed, a detection signal output every time a product is fed out from the production line is received, and the detection signal is set at a predetermined interval. If the received video cannot be received, the captured video is stored retroactively.

  According to the production management method according to the third aspect, the same advantages as those of the production management apparatus according to the first aspect can be obtained. In addition to this, the production management method according to the third aspect can be realized as a production management program and also as a computer-readable medium on which the production management program is recorded.

It is a schematic block diagram which shows a production management system provided with the production management apparatus which concerns on 1st Embodiment, and a manufacturing line. It is a block diagram which shows the internal function structure of the production management apparatus which concerns on 1st Embodiment. It is explanatory drawing which shows the aspect of the image | video preservation | save in 1st Embodiment. It is a block diagram which shows the example of arrangement | positioning of the operating condition acquisition apparatus in 1st Embodiment. It is a flowchart which shows the image | video preservation | save program processing routine performed by the production management apparatus which concerns on 1st Embodiment.

First embodiment:
Hereinafter, a production management system and a production management method according to the present disclosure will be described based on embodiments with reference to the drawings. FIG. 1 is a schematic configuration diagram illustrating a production management system and a production line including a production management apparatus according to the first embodiment. The production management system and the production line shown in FIG. 1 are commonly used in other embodiments.

  The production management system 100 includes a production management device 10 and operating state acquisition devices 20a to 20c. The production management device 10 manages the production status of the first production line L1 and the second production line L2 in cooperation with the operation state acquisition devices 20a to 20c. Note that the number of production lines L may be one, or three or more.

  Each production line L1 and L2 is provided with a transport mechanism 30 for transporting workpieces, that is, processed parts and workpieces, for example, a belt conveyor, and a transporter that moves on a track. Various production facilities 31 to 33 are disposed in the transport mechanism 30, and a parts storage unit 34 is disposed in the vicinity of the transport mechanism 30. Each of the production facilities 31 to 34 is, for example, a metal processing machine, a welding machine, a resin molding machine, a coating machine, a hot forging machine, a finished product collection machine, and a machined part supply machine. Each of the production facilities 31 to 33 includes a production process for a product to be processed in the production facility, a programmable logic controller (PLC) for executing the processing, and various sensors connected to the PLC. For example, it is incorporated in a photoelectric sensor for detecting the arrival or passage of a machined part incorporated in a production facility or a transport mechanism, a dimension sensor for measuring the dimension of a machined part, or a cutting metal processing machine for cutting a machined part. Built into a counter that counts the number of times a cutting tool is used to process a machined part, an area sensor that counts the number of discharged finished products built into the finished product collection machine, or a hand mechanism that transports finished products. A counter that counts the number of opening and closing operations and a cycle measuring instrument that measures the opening operation interval are provided. Each of these sensors is a sensor that is conventionally arranged and connected to the PLC when the production line and the production equipment are installed and arranged in order to operate the production line and the production equipment.

  The parts storage unit 34 is a shelf or space for storing parts to be attached to a workpiece to be processed that has been transported by the transport mechanism 30 by an operator. The worker performs an installation operation in the vicinity of the parts storage unit 34.

  In the example of FIG. 1, a first production facility 31 and a parts storage unit 34 are arranged on the first production line L1. A second production facility 32 and a third production facility 33 are arranged in the second production line L2.

  Cameras 41 and 42 are arranged in at least one of the component storage unit 34 and the second production facility 32. The cameras 41 and 42 are photographing devices that output video data, and the video data is output to the production management device 10 via signal lines. Video data captured by the cameras 41 and 42 is sequentially recorded in a captured video recording unit 122 described later. The camera 41 in the component storage unit 34 is arranged so as to photograph a worker. The camera 41 can acquire the work state of the worker. The camera 42 in the second production facility 32 is arranged on the delivery side and downstream side of the workpiece to be processed in the second production facility 32. The operating state of the second production facility 32 can be acquired by the camera 42.

  In the vicinity of the production facility or the production facility, retrofitted first to third operation state acquisition devices 20a to 20c are mounted or arranged. In this specification, the retrofit is a device that is incorporated from the time of installation of the production facility in order to operate the production facility, or is not mounted in advance, and that controls the operation of each of the production facilities 31 to 33. It means that it is not connected to a certain PLC and is mounted and arranged regardless of the operation and control of the production facility. In the example of FIG. 1, the first, second, and third operation state acquisition devices 20a, 20b, and 20c are respectively attached to the first, second, and third production facilities 31, 32, and 33. .

  The production management apparatus 10 and the first to third operation state acquisition apparatuses 20a to 20c that are attached later can wirelessly transmit and receive data to each other as shown in FIG. The production management device 10 wirelessly transmits the generated production status information in response to requests from the terminal devices PD1 and PD2.

  FIG. 2 is a block diagram showing an internal functional configuration of the production management apparatus according to the first embodiment. FIG. 3 is an explanatory diagram showing a mode of video storage in the first embodiment. The production management device 10 is a device that controls the operations of the production facilities 31 to 33, that is, a device different from the PLC. Even if the production management device 10 is not used, the production facilities 31 to 33 are controlled by the PLC. Is done. The production management device 10 includes a central processing unit (CPU) 11, a storage device 12, a transmission / reception unit 13, a display device 14, and an input device 15 that are connected to each other via a bus 16 so as to communicate with each other. Yes. The CPU 11, the storage device 12, and the transmission / reception unit 13 can communicate with each other bidirectionally. The storage device 12 is, for example, a RAM, a ROM, a hard disk drive (HDD), or a solid state drive (SSD). The HDD (or SSD, ROM) stores a video storage program P1 for realizing the functions provided in this embodiment. Various programs read from the HDD are expanded on the RAM, It is executed by the CPU 11. The CPU 11 that executes the video storage program P1 functions as a video storage execution unit.

  The storage device 12 further includes a storage area for storing a reference pulse interval 121 used when the production management apparatus 10 stores an image, and a captured image that is a readable / writable area for recording image data captured by the cameras 41 and 42. When the detection signals from the recording unit 122 and the detection device are not input at predetermined intervals, the video data captured by the cameras 41 and 42 and recorded in the captured video recording unit 122 is retroactively stored as stored video data. A stored video recording unit 123 is provided. The captured video recording unit 122 and the stored video recording unit 123 are provided in the HDD or the SSD. Note that the captured video recording unit 122 has a pre-allocated storage capacity, and when the storage capacity is exceeded, newly captured video data is overwritten and stored on temporally old video data. . As shown in FIG. 3, the CPU 11 as the video storage execution unit records the stored video data in the stored video recording unit 123 (R1). Note that the saved video data is recorded in the saved video recording unit 123 so as to be rewritable since it is recorded in the video saving execution unit 123 which is a recording unit different from the captured video recording unit 122 in which the shot videos are sequentially recorded. May be.

  The storage device 12 may include only the captured video recording unit 122. In this case, as shown in FIG. 3, the CPU 11 as the video storage execution unit records the stored video data in a non-rewritable manner on the captured video recording unit 122 (R2), thereby preventing overwriting of the stored video data. Can be saved. The photographed video recording unit 122 has an area for recording stored video data so that it cannot be overwritten.

  The transmission / reception unit 13 is provided in each production facility on the production lines L1 to L2 via wireless communication, or is disposed in the vicinity of each production facility in the first to third operating states. Detection signals related to the operating state are received from the acquisition devices 20a to 20c. The transmission / reception unit 13 transmits various execution instructions to the first to third operating state acquisition devices 20a to 20c. The transmission / reception unit 13 further transmits the production status information as an output to the terminal devices PD1 and PD2 which are external devices, or receives input requesting execution of various processes from the terminal devices PD1 and PD2. When the transmission / reception unit 13 is an input / output I / F having a wireless communication function, the transmission / reception unit 13 is connected to the first via a wireless repeater (access point) (not shown) installed in the factory. The radio wave from the third operating state acquisition devices 20a to 20c may be received, or the transmission / reception unit 13 itself can receive the radio wave from the first to third operating state acquisition devices 20a to 20c. It may be arranged in any place. In addition, the transmission / reception unit 13 may be wired to the wireless repeater. In any case, it is only necessary to acquire information related to the operating state without making a wired connection to each of the operating state acquisition devices 20a to 20c. By doing in this way, the production management system 100 according to the present embodiment can be achieved with only a relatively simple change of mounting or arranging the first to third operating state acquisition devices 20a to 20c for each production facility. Can be installed in existing factories. The wireless communication can be realized by, for example, a wireless connection through a wireless local network (LAN) compliant with the IEEE 802.11 standard.

  The display device 14 is used to display processing contents when operating the production management system 100 or is a display for displaying production status information. The display device 14 may be provided separately from the production management device 10. The input device 15 is a device used for inputting to the production management system 100, and is, for example, a keyboard or a mouse, and further a pressure-sensitive touch panel provided on the screen of the display device 14. Also good.

  FIG. 4 is a block diagram illustrating an arrangement example of the operating state acquisition apparatus according to the first embodiment. In addition, in FIG. 4, although the 1st operation state acquisition apparatus 20a is illustrated exemplarily, the other 2nd and 3rd operation state acquisition apparatuses 20b and 20c also have the same structure. The first operating state acquisition device 20a is in the vicinity of the first production facility 31, more specifically, the end of the transport mechanism 30 where the first production facility 31 is arranged, that is, the finished product of the line. It is arranged at a position where WP is discharged. The processed product WP may be a finally completed product or an intermediate product. The first operating state acquisition device 20a includes a detection unit 21a as a first detection unit that is connected by a signal line and is provided separately from a main body in which a controller 21b including a transmission / reception unit is stored. The detection unit 21a is disposed at the upper end of the support unit that supports the transport mechanism 30, and the main body is disposed on an intermediate side surface of the support unit. For example, a photoelectric optical sensor can be used as the detection unit 21a. According to the photoelectric optical sensor, the passage of the processed product WP conveyed by the conveyance mechanism 30 can be detected by blocking light. The detection signal output at the time of interruption is a 1 or 0 pulse signal. The photoelectric sensor includes a light source that outputs light such as visible light, infrared light, and ultraviolet light, and a light receiving unit that receives light from the light source. By disposing the first operating state acquisition device 20a in the vicinity of the first production facility 31, it is possible to detect the presence or absence of conveyance (discharge) of the processed product WP as the operational state of the first production facility 31. . Specifically, by arranging the first operating state acquisition device 20a that is retrofitted, a detection signal as information indicating an operating cycle that is one of the operating states of the first production facility 31 is acquired, and production management is performed. The device 10 can be provided.

  The detection unit 21a is a variety of sensors that are attached to the first production facility 31 or arranged in the vicinity of the first production facility 31 as a retrofit, and performs processing and processing on a processed part by the production facility. Unlike existing sensors connected to a programmable logic controller (PLC). The detection unit 21a may be provided integrally with the first operating state acquisition device 20a. The detection unit 21a is a detection unit that can count the processing, the operation related to the processing, the operation start, the execution or completion timing, and the number of times of the processing target product in the production facility. The detection unit 21a may be a detection unit that includes only a detection element and outputs an analog signal. Alternatively, in addition to the detection element, a signal output from the detection element may be converted into a digital signal. A detection unit including a circuit for outputting may be used. The controller 21b includes a central processing unit (CPU) and a storage device (not shown). The controller 21b transmits the detection signal received from the detection unit 21a via the transmission / reception unit wirelessly to the production management apparatus 10 according to an arbitrary communication protocol, or from the production management apparatus 10 Receive execution instructions. When the signal input from the detection unit 21a is an analog signal, the controller 21b is high (1) in the active high logic when the signal value is equal to or greater than a predetermined value, less than a specified value, or in an arbitrary range. In the active low logic, the detection signal is transmitted to the production management apparatus 10 through the transmission / reception unit after being converted into a digital signal taking Low (1). Therefore, in the present embodiment, only the detection unit 21a can function as the detection unit, and the detection unit can be realized by the detection unit 21a and the controller 21b. The controller 21b may store the detection signal received from the detection unit 21a in a storage device and transmit the detection signal to the production management device 10 in accordance with the execution command received from the production management device 10.

  As a sensor used as the detection unit 21a, other optical sensors, sound sensors, thermal sensors, current sensors, distance sensors, atmospheric pressure sensors, acceleration sensors, rotational speed sensors, humidity sensors, and pressure sensors are used in addition to photoelectric sensors. Can be. Each sensor is a sensor for detecting the operating state of the production facility, and how it is used will be described below. In the present embodiment, the operating state means operations and operations related to processing and processing on the processing target product in the production line and the production facility. For example, the operation, operation start, execution, stop, completion Such a state may be included. Hereinafter, the third production facility 33 will be described as an example of the production facility.

  The optical sensor including the illuminance sensor is used to detect the number of times that the indicator lamp is turned on or off when the third production facility 33 is provided with an indicator lamp that is repeatedly turned on and off every processing cycle. Used for. The machining cycle of the third production facility 33 can be acquired as an operating state by a detection signal corresponding to the number of times the indicator lamp is turned on or off. In addition, when a color sensor is used as the light sensor, the lighting color of the indicator lamp having a plurality of colors can be determined, so that the operation cycle of the production facility corresponding to the lighting color can be acquired. The sound sensor is used for detecting operation sound such as motor sound, air discharge sound and door opening / closing sound in the third production facility 33, and sound accompanying processing such as cutting sound and hammering sound. When the sound volume detected by the sound sensor exceeds the specified sound volume, the detection signal is output from the operating state acquisition device 20c, whereby the operation or processing cycle can be acquired as the operating state.

  The thermal sensor is used to detect discharge of a high-temperature processed part from the third production facility 33. Specifically, an infrared sensor capable of detecting the temperature of a processed part, or a thermostat capable of detecting that the temperature of the processed part is equal to or higher than a specified temperature, lower than a specified temperature, or in an arbitrary temperature range may be used. When an infrared sensor is used, a detection signal is output when the detection temperature is equal to or higher than a specified temperature, and when a thermostat is used, an operation signal is used as the detection signal, so that the third production is performed. The machining cycle of the facility 33 can be acquired as an operating state.

  A current sensor including a current checker operates an actuator provided in the third production facility 33, or an operation of a processing machine that requires electric power for processing such as a welding machine, that is, processing in the third production facility 33. Used to detect actions related to the discharge of completed parts. Specifically, a detection signal indicating that the current value during operation of the actuator and the processing machine is greater than or equal to the specified current value, less than the specified current value, or in an arbitrary current value range is produced from the third operating state acquisition device 20c. It is transmitted to the management apparatus 10 and the processing cycle of the third production facility 33 can be acquired as the operating state. In addition to this, by using a sensor capable of measuring and detecting a high voltage such as a lightning sensor, a high voltage (high energy) instantaneously generated in an arc welding machine or an induction hardening machine is detected. The processing cycle of the third production facility 33 can be acquired as an operating state.

  The distance sensor detects the distance from a target such as a jig, a cutting tool, a robot hand, or a machined part provided in the third production facility 33, or through a processing operation or a machining operation of the third production facility 33, or It is used to detect the discharge of the processed part by the movement of the processed part itself. Specifically, a detection signal indicating that the distance to the object is greater than or equal to the specified distance, less than the specified distance, or in an arbitrary distance range is transmitted from the third operating state acquisition device 20c to the production management device 10. The machining cycle of the third production facility 33 can be acquired as the operating state. As the distance sensor, for example, a sensor that emits infrared light, laser light, ultrasonic waves, sound waves, etc., and measures the distance to the object based on the time until the reflected wave reflected by the object returns. Is used.

  The atmospheric pressure sensor and the water level sensor are respectively used in the cutting, cleaning, quenching, and tempering processes using the liquid such as water and oil, and the cutting and cleaning processes. Is used to detect the discharge of the processed parts through the processing operation of the third production facility 33 by detecting the change in the level of the liquid used in the process. Specifically, a detection signal indicating that the pressure or water level (liquid level) is greater than or equal to a specified value, less than the specified value, or in an arbitrary range is transmitted from the third operating state acquisition device 20c to the production management device 10. Thus, the machining cycle of the third production facility 33 can be acquired as an operating state.

  The acceleration sensor, the proximity switch, and the Doppler sensor are disposed at the front ends of the doors and cylinders provided in the third production facility 33, and are used to detect discharge of the processed parts through opening / closing of the doors and reciprocation of the cylinders.

  The rotation speed sensor detects the rotation speed of a jig, a cutting tool, a rotary table, a processed part, etc. provided in the third production facility 33, or through the processing operation of the third production facility 33, or the processed component itself. Is used to detect the discharge of the processed part. Specifically, a detection signal indicating that the detected rotational speed is greater than or equal to a specified value, less than the specified value, or in an arbitrary range is transmitted from the third operating state acquisition device 20c to the production management device 10, The machining cycle of the third production facility 33 can be acquired as an operating state.

  The pressure sensor and the pressure sensor are arranged on the door, operation panel, or part where pressure is applied such as pressing or pinching provided in the third production facility 33, and the door opening / closing, operation panel operation, pressing or pinching is performed. Used to detect the discharge of the workpiece through detection.

  The gyro sensor detects the tilt and speed of the jig, cutting tool, robot hand, processed part, etc. provided in the third production facility 33, through the processing operation of the third production facility 33, or the processed component itself. Is used to detect the discharge of the processed part. Specifically, a detection signal indicating that the detected inclination or speed is equal to or greater than a specified value, less than the specified value, or in an arbitrary range is transmitted from the third operating state acquisition device 20c to the production management device 10. The machining cycle of the third production facility 33 can be acquired as the operating state. The tilt sensor detects the tilt of the jig, the cutting tool, the robot hand, the machining part, etc. included in the third production facility 33 and the tilt of the processing apparatus table or the seesaw type conveyance unit, thereby providing Used to detect the discharge of the processed part through the processing operation. Specifically, a detection signal indicating that the detected inclination is equal to or greater than a specified value, less than a specified value, or in an arbitrary range is transmitted from the third operating state acquisition device 20c to the production management device 10, and The processing cycle of the third production facility 33 can be acquired as an operating state.

  In addition to this, it is possible to detect discharge of a processed part by detecting a human operation using a human sensor or a capacitive sensor, or to use a humidity sensor to perform cutting using a liquid such as water or oil, By detecting a change in humidity caused by the liquid used in the cleaning, quenching, and tempering steps, it is possible to detect the discharge of the processed part.

  The operation of the production management apparatus 10 will be described. FIG. 5 is a flowchart showing a video storage processing routine executed by the production management apparatus according to the first embodiment. This processing routine is executed by the CPU 11 executing the video storage program P1, and the CPU 11 repeatedly executes the video storage program P1 after the production management device 10 is started and until the production management device 10 is terminated. To do.

  The production management device 10, that is, the CPU 11 receives the detection signal from the detection unit 21a (step S100). The detection unit 21a may output a detection signal obtained by converting an analog signal such as a current output from the detection element into a digital signal by a circuit provided therein, or an analog signal such as a current output from the detection element. It may be output as a detection signal.

  The CPU 11 determines whether the input interval of the detection signal received from the detection unit 21a is normal, that is, whether the detection signal is input at a predetermined interval (step S110). Specifically, it is determined whether or not a new detection signal is input at a timing when the reference pulse interval 121 has elapsed since the last detection signal was input. The reference pulse interval 121 means a pulse interval predetermined for each production facility, that is, a cycle time at which a processed part is to be discharged from the production facility, or a cycle time at which a machining process is to be completed in the production facility. For example, a time interval of 20 seconds or 30 seconds is one cycle. As described above, the detection signal is a pulse waveform signal having a waveform interval corresponding to the passage of the workpiece to be processed or the operation of the production facility related to the passage of the workpiece to be processed. Is as planned, the detection signal is input at the reference pulse interval. Whether or not the input interval of the detection signal received from the detection unit 21a is normal is determined by waiting for the input of a new detection signal after the last detection signal is input, and then starting from the last detection signal to the new detection signal. And the reference pulse interval 121 may be determined.

  When the CPU 11 determines that the detection signal input interval received from the detection unit 21a is normal (step S110: Yes), the CPU 11 ends the present processing routine. This is because when the detection signal input interval is normal, it is not necessary to store the image in a non-rewritable manner and to consider a manufacturing delay without stopping the manufacturing line.

  When the CPU 11 determines that the input interval of the detection signal received from the detection unit 21a is not normal (step S110: No), the CPU 11 stores the video retroactively (step S120), and ends this processing routine. As shown in FIG. 3, for example, the video is stored in the storage video recording unit 123 for a period of time from when the detection signal is last input until the detection signal input interval is determined to be not normal. Alternatively, it is executed by storing it in the captured video recording unit 122 so that it cannot be overwritten. Alternatively, it is executed by recording a video over a period that is back by the reference pulse interval or the reference pulse interval + α from the last input of the detection signal in the storage video recording unit 123 or in the photographic video recording unit 122 so that it cannot be overwritten. The Since shooting time information is recorded in the video, it is determined from the video data recorded in the shooting video recording unit 122 that the detection signal input interval is not normal from the time when the detection signal was last input. Saved video data by cutting out or extracting video data up to the specified time, or by cutting out or extracting video over a period that is back by the reference pulse interval or reference pulse interval + α since the last detection signal was input Can be obtained. Note that the stored video data may be stored in association with the time when it is determined that the reception interval is not normal. In this case, the corresponding stored video data can be easily retrieved from the time determined that the reception interval is not normal.

  According to the production management apparatus 10 according to the first embodiment described above, when the input interval of the detection signal received from the detection unit 21a is not normal, the video data captured by the cameras 41 and 42 is stored retroactively. can do. Therefore, it is possible to easily check the production line due to an event that does not lead to the stop of the production line, for example, the production delay due to malfunction or malfunction of the production facility, or the production delay due to the work delay of the operator. The production efficiency can be improved. Specifically, when the reference pulse interval elapses from the last detection signal input, the image spans the period from the last detection signal input to the last detection signal input after the reference pulse interval elapses Alternatively, the stored video recording unit 123 stores an image over a period that is back by the reference pulse interval or the reference pulse interval + α from when the reference pulse interval has elapsed since the last detection signal was input. Therefore, it is possible to easily discriminate an image indicating an event that does not lead to the stop of the production line, and it is possible to efficiently verify the event that does not lead to the stop of the production line. On the other hand, since video data was saved at the time when the production line stopped, it was impossible to identify production delay events by video, and verification of production efficiency of the production line using video. I couldn't do it.

Second embodiment:
In the second embodiment, the reference pulse number may be used instead of the reference pulse interval. Since the other structure of the production management apparatus according to the second embodiment is the same as that of the production management apparatus 10 according to the first embodiment, the same reference numerals are given and description thereof is omitted. The number of reference pulses is the number of pulses per unit time predetermined for each production facility, that is, the number of processed parts to be discharged from the production facility per unit time, or the processing processing in the production facility per unit time. Means the number to be completed. When the reference pulse number is used, the CPU 11 obtains the detection pulse number per unit time from the detection signal, and compares the obtained detection pulse number per unit time with the reference pulse number, and the detection pulse number is small. In addition, the video data shot in the unit time window is stored.

Third embodiment:
Since the configuration of the production management apparatus according to the third embodiment is the same as that of the production management apparatus 10 according to the first embodiment, the same reference numerals are given and description thereof is omitted. The production management device 10 according to the third embodiment may transmit the stored video to the terminal devices PD1 and PD2 when determining that the reception interval is not normal. According to the production management system 100 including the production management device 10, the video data stored through the terminal devices PD1 and PD2 can be browsed with good timing. Therefore, even in a remote place, it is possible to quickly grasp the production status of the production line and production equipment, analyze the cause of the delay when the delay occurs, and examine the countermeasure.

Fourth embodiment:
Since the configuration of the production management apparatus according to the fourth embodiment is the same as that of the production management apparatus 10 according to the first embodiment, the same reference numerals are given and description thereof is omitted. According to the production management apparatus 10 according to the first embodiment, whether or not the reception interval of the detection signal is normal is determined every time the detection signal is received, that is, in real time, and the detection signal is received. Saving of video data is executed when the interval is not normal. On the other hand, in the production management device 10 according to the fourth embodiment, whether or not the reception interval of the detection signal is normal is determined at the timing when the production line is stopped according to the production calendar, for example. May be executed together. In this case, the time frame of the detection signal and the time frame of the video data are recorded in the captured video recording unit 122 in association with each other, and the video data is cut out from the time timing at which the detection signal interval is delayed. What is necessary is just to record in the preservation | save video recording part 123, or to record in the photography video recording part 122 so that overwriting is impossible. When the operation window of the production line is smaller than the recording capacity of the photographed video recording unit 122, the video data relating to the production delay event can be stored in an unoverwritable manner even by this method. Further, the production management apparatus 10 does not need to perform parallel processing for recording the video data from the cameras 41 and 42 and determining whether the reception interval of the detection signal is normal, thereby suppressing the frequency of execution of the determination processing. Therefore, the processing load on the production management device 10 can be reduced.

・ Modification:
(1) In the first embodiment, three production facilities are arranged in each of the production lines L1 and L2, but one or two production facilities may be provided, and four or more are provided. Also good. Also, the number of production lines may be 1 and 2 lines, or 3 lines or more.

(2) In the first embodiment, the production management apparatus 10 and each of the operation state acquisition apparatuses 20a to 20c communicate with each other by wireless communication, but may be performed by wired communication. For example, when a wired local area network (LAN) connection port is prepared in the vicinity of each of the production facilities 31 to 33, the use of the connection port saves the trouble of new wiring, which is the same as wireless communication. Thus, the production management system 100 according to the first embodiment can be easily introduced.

(3) In the first embodiment, the detection signal is converted into a pulse signal, that is, converted into a digital signal in each of the operating state acquisition devices 20a to 20c, but may be executed in the production management device 10. That is, an analog signal may be transmitted from each of the operation state acquisition devices 20a to 20c to the production management device 10, and the above-described pulse signal generation may be performed in the production management device 10.

  As described above, the present disclosure has been described based on the embodiments and the modified examples. However, the above-described embodiments of the present invention are for facilitating understanding of the present disclosure, and do not limit the present disclosure. The present disclosure can be modified and improved without departing from the spirit and scope of the claims, and the present disclosure includes equivalents thereof. For example, the technical features in the embodiments and the modifications corresponding to the technical features in each embodiment described in the summary section of the invention are to solve some or all of the above-described problems, or In order to achieve part or all of the effects, replacement or combination can be performed as appropriate. Further, if the technical feature is not described as essential in the present specification, it can be deleted as appropriate.

  DESCRIPTION OF SYMBOLS 10 ... Production management apparatus, 11 ... CPU, 12 ... Memory | storage device, 13 ... Transmission / reception part, 14 ... Display apparatus, 15 ... Input device, 16 ... Bus, 20a ... 1st operation state acquisition apparatus, 20b ... 2nd Operating state acquisition device, 20c ... third operating state acquisition device, 21a ... detection unit, 21b ... controller, 30 ... transport mechanism, 31 ... first production facility, 32 ... second production facility, 33 ... third 34 ... Parts storage unit, 41, 42 ... Camera, 100 ... Production management system, 121 ... Reference pulse interval, 122 ... Shooting video recording unit, 123 ... Storage video recording unit, I / F ... I / O, L1 ... first production line, L2 ... second production line, PD1, PD2 ... terminal device, WP ... finished product, P1 ... video storage program

Claims (11)

A production management device for managing the production status of a production line,
A photographing device for photographing the production status in the production line;
A detection device that outputs a detection signal each time a product is unwound from the production line;
A production management device comprising: a video storage execution unit that retroactively stores video captured by the imaging device in a storage device when the detection signal output from the detection device is not input at a predetermined interval; . The production management device according to claim 1,
The video storage execution unit stores the video in the storage device retroactively to the time when the detection signal was last input. The production management device according to claim 1,
The video storage execution unit stores the video in the storage device retroactively for a predetermined period. In the production management device according to any one of claims 1 to 3,
The said imaging | photography apparatus is a production management apparatus arrange | positioned corresponding to at least any one of the place where work is performed in the said production line, and the production equipment arrange | positioned in the said production line. In the production management device according to any one of claims 1 to 4,
The storage device includes a captured video recording unit in which the video is overwritten when the recording capacity is exceeded, and a stored video recording unit that is a recording unit different from the captured video recording unit,
The video storage execution unit stores the video stored retroactively in the stored video recording unit. In the production management device according to any one of claims 1 to 4,
The video storage execution unit overwrites and records the video when the recording capacity is exceeded, and the video that is stored retroactively is stored in the storage device in a non-overwriteable manner. In the production management device according to any one of claims 1 to 4,
The video storage execution unit stores the video stored retroactively and the time when the detection signal is determined not to be input at the predetermined interval in association with each other. In the production management device according to any one of claims 1 to 7,
The detection device is a production management device that is attached to a production facility arranged in the production line as a retrofit or is arranged near the production facility as a retrofit. The production management device according to any one of claims 1 to 8, further comprising:
A production management apparatus comprising: an output device that outputs the stored video to an external device at a timing when it is determined that the detection signal is not input at a predetermined interval. A production management system for managing the production status of a production line,
The production management device according to any one of claims 1 to 9,
A production management system comprising: a terminal device that receives the stored video output from the production management device. A production management method for managing the production status of a production line,
Taking a picture of the production status in the production line,
Receiving a detection signal that is output each time a product is delivered from the production line;
A production management method comprising: storing the captured video retrospectively when the detection signal cannot be received at a predetermined interval.

Images