JP6413016B2 - Article management system for assembly - Google Patents

Description

  The present invention relates to an assembling article management system for controlling an instruction for receiving and supplying parts necessary for assembling a product from among articles stored in a storage space such as an article storage shelf.

  As a typical example of an article management system for assembly, there is a picking system widely used in an assembly production process, particularly a process using a cell production system. The picking system controls instructions for receiving parts necessary for assembling a product from articles stored in an article storage space such as an article storage shelf, and vice versa. Is.

  More specifically, a terminal having a notification information input means that indicates that the article is arranged and that the article has been carried out is arranged in each of the plurality of article accommodation spaces, These terminals are configured to be connected to a host computer via a control device. Then, the host computer transmits an instruction for picking up the parts to the control device, and the control device indicates the instruction state by a lamp or a display of the terminal mounted on the parts delivery shelf where the pick-up instruction is issued. .

  On the other hand, an operator or robot or automated guided vehicle that has completed taking instructed parts operates a lever switch of the terminal as a take-off completion input, and the operation signal is sent to the host computer via the control device. In this system, work progress, prevention of erroneous work, replenishment of parts into the article storage space, inventory management of parts, ordering of spare parts, and the like are performed.

  In the conventional assembly article management system, various types of indicators and confirmation switches in the terminal are adopted depending on the use situation, and in order to prevent mistakes in receiving work, There is a case where a lid body of a plate body or a sheet roll body (hereinafter, what opens and closes the opening of the accommodation space is referred to as a lid body regardless of the shape) may be provided. That is, by receiving only the article storage space in which the articles to be received are stored and closing the other article storage spaces, erroneous receipt of articles is prevented.

  However, when the lid provided in the article storage space is controlled to be opened and closed by a pneumatic cylinder or the like, it is only possible to select “open” or “closed” as a possible state of the lid. Therefore, precise control relating to the lid cannot be performed, and there is a problem that, for example, there is a risk that an operator's arm may be caught between the lids.

  Therefore, the present applicant has proposed an article receipt management system corresponding to an assembly article management system in Japanese Patent No. 4712121. In this article receipt management system, the sign provided on the circumferential surface of the rotating shaft of the lid is read at a predetermined measurement position, and the rotation angle of the rotating shaft is related to the information obtained from the sign by relating the rotation angle of the rotating shaft. Control according to the angle is performed. And the lid provided in the article accommodation space is controlled more precisely, and the occurrence of an accident such as the operator's arm being caught between the lids is prevented.

Japanese Patent No. 4712121

  In addition, in the above conventional assembly article management system, in addition to controlling the lid provided in the article storage space, the total number of rotations of the rotary shaft is calculated from the number of times the lid is opened and closed, and the life of the drive device for the rotary shaft is reduced. It is predictable.

  However, the number of times the drive device can rotate the lid varies depending on the specifications and model of the device, so it is necessary to know the number of times that the life is reached by a confirmation test, etc., and it is difficult to put it to practical use. There was a problem that it was difficult to grasp the exact life due to the influence of errors due to the difference in test conditions.

  Therefore, an object of the present invention is to provide an assembly article management system that can accurately grasp the arrival of the life of each of a plurality of drive devices by a simple principle.

In the article management system for assembly according to the present invention, each of the plurality of article storage spaces has a cover that opens and closes a take-out port of the article storage space, and a slave station that can exchange data with the master station is installed. Is done. Slave station includes a measurement unit, and the initial setting input means, the initial setting value storing means, the arithmetic processing means.

  The measuring means measures a first operation time for the lid to open the article accommodation space and a second operation time for the lid to close the article accommodation space.

  The initial setting input means designates an arbitrary initial setting.

When the initial setting time is instructed by an input operation via the initial setting time input means, the initial setting value storage means sets the first operating time measured at the initial setting as a first initial operating time. as, it memorizes the second operation time measured in the initial setting as a second initial operation time.

It said processing means, said first operating time and comparison of the first initial operation time, or in based on the comparison of the second operating time and the second initial operation time, apparatus of the driving means of the lid Determine the end of life .

  The initial setting time may be instructed from the master station to the slave station.

  In the present invention, the initial setting can be arbitrarily determined in consideration of the usage situation and the like. For example, in the case of a newly installed system, it is optimal to check the opening / closing operation of the lid after the installation and before the system normally operates. In addition, in the case of an existing system, it is optimal to check the opening / closing operation of the lid body, which is normally performed after the slave station is replaced due to a design change or failure, etc.

It said processing means, when the front SL is first operation time deviated larger side from the allowable open time range obtained by adjusting the tolerance of a predetermined ratio to said first initial operation time, or the second operation When the time deviates from the allowable closing time range obtained by adding or subtracting a predetermined percentage tolerance to the second initial operating time, it is determined that the device life of the driving means of the lid has come It may be.

  Further, the arithmetic processing means compares a lifetime integrated current value, which is a cumulative value from the initial setting time of the first operation time and the second operation time, with a predetermined lifetime setting value, and calculates the lifetime integrated current. You may judge that the value became larger than the said lifetime setting value.

  Furthermore, the slave station, when the lifetime integrated current value becomes larger than the lifetime setting value, outputs the presence or absence of cumulative excess to the master station, the master station based on the presence or absence of cumulative excess, It may be determined whether or not maintenance of the slave station is necessary.

  According to the present invention, the first operation time for the lid to open the article accommodation space and the second operation time for the lid to close the article accommodation space are utilized using the difference between the initial setting and the normal operation. The arrival of the life of each of the plurality of drive devices that operate the plurality of lids can be easily and accurately grasped.

  In addition, since the determination is made for each of the first operation time for the lid to open the article accommodation space and the second operation time for the lid to close the article accommodation space, the characteristics of the drive means are in the rotational direction (forward rotation). Even if it differs depending on the reverse), the arrival of the life can be accurately determined.

  In addition, since the first initial operation time and the second initial operation time, which are the basis for comparison and determination, are measured for each of the lids at any initial setting, the frontage dimensions of the article storage space (the lid shape) The operation time depends on the weight of the lid, and the opening angle if it is made of a plate, the length of hanging if it is made of a sheet roll, and the difference in the direction of gravity with which the lid opens and closes. Even if it becomes different for each slave station, accurate judgment can be made individually.

  Furthermore, since the initial operation time is transmitted from the slave station to the master station, and the initial operation time is transmitted from the master station to a slave station different from the slave station that transmitted the initial operation time, the lid of the same specification When there is a lot of data, the initial operation time is transmitted from the master station to each of the slave stations, thereby reducing the effort and time required for setting work compared to the case of setting the initial operation time for each slave station. be able to.

  The assembly article management system according to the present invention further determines not only the device life of the lid drive means but also other abnormal operations by utilizing the difference in time during normal operation with respect to the initial setting. can do.

  That is, when the lid is removed from the rotating shaft of the driving means, the rotating shaft of the driving means rotates fast without receiving the driving load of the lid, so that the first operation time deviates from the allowable open time range to the smaller side. When the second operation time deviates from the allowable closing time range to the smaller side, the lid drive means is idled and it can be determined that the lid is not operating normally.

  Furthermore, if there is a foreign object on the movement path of the lid, the normal operation of the lid is hindered and the operation is not completed. Therefore, the measurement of the first operation time is stopped after a lapse of a predetermined time on the side larger than the range of the allowable opening time from the start of the first operation time, or is larger than the range of the allowable closing time from the start of the measurement of the second operation time. The measurement of the second operation time is stopped after the predetermined time has elapsed. In this case, it is possible to determine that there is a failure in the operation of the lid by stopping the measurement.

  Furthermore, the current accumulated life value, which is a cumulative value from the initial setting of the first operation time and the second operation time, is compared with a predetermined lifetime setting value, and the accumulated lifetime current value is greater than the lifetime setting value. By detecting this, the drive means that has reached the end of its life will operate better than usual due to the installation status of the lid and compatibility of the combination, etc., and operate within the allowable open time or allowable close time For example, it is possible to obtain an indication of the apparatus life.

  Further, if operation abnormality data indicating an operation abnormality is output from the slave station to the master station, and the master station determines whether or not the maintenance check of the slave station is necessary based on the operation abnormality data, a plurality of article storage spaces are provided. It is possible to manage the operation abnormalities of the slave stations installed in the lump.

  Furthermore, by using the accumulated value or frequency value of the operation abnormality data, it is possible to determine the normality of the take-out operation or the replenishment operation in the article accommodation space in addition to the operation abnormality in the slave station. For example, when the attachment state of the lid is bad, it is determined that the operation abnormality data output when the measurement of the first operation time or the second operation time is stopped frequently and the normality is bad.

It is a system configuration figure of an embodiment of an article management system for assembly concerning the present invention. It is a functional block diagram of a master station. It is a functional block diagram of a slave station. It is a perspective view which shows the principle which detects the position of the cover body comprised with the plate body. It is a perspective view which shows the principle which detects the position of the cover body comprised with the sheet roll body. It is a time chart of operation time. It is a schematic diagram of the transmission procedure in a system. It is a time chart figure of a transmission signal.

An embodiment of an article management system for assembly according to the present invention will be described with reference to FIGS.
The assembly article management system shown in FIG. 1 controls the reception and supply instructions for parts necessary for assembling products from the articles stored in the storage space of the article storage shelf. A single master station 2 connected to signal lines DP and DN (hereinafter also referred to as transmission lines) and a plurality of slave stations 4 connected to the common data signal lines DP and DN are provided.

  The slave station 4 is installed in each of the accommodation spaces. The accommodation space is a frontage according to the application, and the slave station 4 includes a lid body 6 having a shape adapted to the frontage of the accommodation space. The accommodation space is opened and closed by the lid 6.

<Cover body opening and closing configuration>
As shown in FIG. 4, the lid body 6 is configured by a plate body, the edge portion is fixed to the rotating shaft 61, and swings in the circumferential direction of the rotating shaft 61 by the rotating operation of the rotating shaft 61. . And opening of an accommodation space is opened and closed by changing the angle with respect to the opening surface of an accommodation space.

  The lid body 6 is not limited as long as the opening of the accommodation space can be opened and closed, and may be configured by a sheet roll body as shown in FIG. When the lid 6 is composed of a sheet roll body, the opening of the housing space is opened and closed by changing the length of the housing space depending from the upper side to the lower side, that is, by moving the sheet roll body up and down. That's fine.

  The rotation shaft 61 is connected to a motor 8 included in the slave station 4 via a gear (not shown), and the rotation of the rotation shaft 61 is controlled by controlling the motor 8.

  The rotating shaft 61 is also provided with a marker 62 composed of a plurality of bars arranged at intervals on the circumferential surface thereof. As shown in FIG. 4, the sign 62 includes a plurality of angle signs 62A arranged in the circumferential direction, and a start sign 62S and an end sign 62E arranged at positions sandwiching the series of angle signs 62A.

  The start mark 62S protrudes from the end on the side farther from the lid body 6 than the angle mark 62A and the end mark 62E. On the other hand, the end mark 62E protrudes at the end closer to the lid body 6 than the angle mark 62A and the start mark 62S.

  The sensor 5 includes three optical sensors 5a, 5b, and 5c that are arranged at equal intervals in the length direction of the rotating shaft 61. Each of the optical sensors 5a, 5b, and 5c is a known sensor composed of a light-emitting diode and a phototransistor, and is read using a difference in shading between the sign 62 and the other portions.

  However, the sensor 5 is not limited to an optical sensor as long as it can detect the sign 62, and other known sensors such as a magnetic sensor may be adopted.

  In this embodiment, the lid body 6 in the closed state has an angle of 0 degrees with respect to the opening surface of the accommodation space, and is in a state indicated by a solid line in FIG. At this time, the sensor 5 detects the start mark 62S. The sensor 5 is not detected by the optical sensor 5a but is detected by the optical sensors 5b and 5c, so that the detected sign 62 is recognized as the start sign 62S.

  On the other hand, the lid 6 in the opened state has an angle of 90 degrees with respect to the opening surface of the accommodation space, and is in a state indicated by a broken line in FIG. At this time, the sensor 5 detects the end mark 62E. In the sensor 5, since it is not detected by the optical sensor 5c but detected by the optical sensors 5a and 5b, the detected marker 62 is recognized as an end marker 62E.

  The angle marker 62A is recognized by being detected by the optical sensor 5b. Information about the sign 62 detected by the sensor 5 is input from the sensor 5 to a slave station input / output unit 40 described later.

  The angle with respect to the opening surface of the accommodation space of the lid 6 in the opened state is not limited to 90 degrees, and may be other angles. In that case, it may be detected by changing the position of the start marker 62S, or may be detected using a predetermined angle marker 62A. In this embodiment, since the angle markers 62A are arranged at intervals of 15 degrees, the angle with respect to the opening surface of the accommodation space can be set to 75 degrees, 60 degrees, and the like, for example. The angle with respect to the opening surface of the accommodation space of the lid 6 in the closed state is also the same.

<Master station configuration>
As shown in FIG. 2, the master station 2 includes a control unit 1, an output data unit 21, a management data unit 22, a timing generation unit 23, a master station output unit 24, a master station input unit 25, and an input data unit 26. The control signal, which is connected to the common data signal lines DP and DN, is superimposed on the common data signal lines DP and DN, and is superimposed on the common data signal lines DP and DN from the slave station 4. Monitor data is extracted from the monitor signal, and arithmetic processing for control is performed.

  The control unit 1 includes a management determination unit 11 having an arithmetic processing function and an input / output unit 12. The management determination unit 11 receives data from the management data unit 22 and the input data unit 26 via the input / output unit 12 and performs necessary arithmetic processing based on a program stored therein.

  The output data unit 21 delivers the data received from the control unit 1 to the master station output unit 24 as serial data.

  The management data unit 22 includes a storage unit 29 having a nonvolatile function for storing the IDX table. Then, based on the data received from the control unit 1 and the IDX table, the data necessary for specifying the slave station is transferred to the master station output unit 24 as serial data.

  The IDX table is a list of address data for designating the slave station 4 that causes the slave station 4 to output information on the slave station 4 side that cannot be obtained as monitoring data to the data signal lines DP and DN. In this embodiment, the head address number which is the address data of the slave station 4 is used as the address data. The IDX table is created while the master station 2 confirms the head address based on the response from each slave station 4 when the system is activated, and is stored in the storage means 29.

  The timing generation unit 23 includes an oscillation circuit (OSC) 31 and a timing generation unit 32. The timing generation unit 32 generates a timing clock of the system based on the oscillation circuit (OSC) 31, and generates a master station output unit 24, Delivered to the station input unit 25.

  The master station output unit 24 includes control data generating means 33 and a line driver 34. Based on the data received from the output data section 21 and the timing clock received from the timing generation section 23, the control data generation means 33 transmits a series of pulse signals to the common data signal lines DP and DN via the line driver 34. Superimpose the signal.

(Transmission signal)
The transmission procedure is one frame cycle following the control / monitoring data area and the management data area between the start signal ST of the transmission signal and the next start signal ST. As shown in FIG. It is composed of a series. The start signal ST is longer than the time width of the transmission data signal and has a potential level higher than the threshold value Vst (18 V in this embodiment) of the transmission clock signal.

  As shown in FIG. 8, the transmission data signal has a potential level area higher than the transmission clock signal threshold Vst (corresponding to the transmission clock signal, +24 V in this embodiment) and a potential level area lower than the transmission clock signal threshold Vst. Consists of. In this embodiment, the potential level area higher than the threshold Vst of the transmission clock signal is the latter half of one cycle, and the potential level area lower than the threshold Vst of the transmission clock signal is the first half of one cycle. There is no limitation, and the order may be reversed.

  The pulse width in the potential level area lower than the threshold value Vst represents the control signal data. In this embodiment, when one cycle of the transmission data signal is t0, the pulse width (3/4) t0 of the transmission clock signal represents the logical data “0”, and the pulse width (1/4) t0 represents the logical data “0”. 1 ". However, as long as it corresponds to the value of the control data input from the control unit 1, the length is not limited and may be determined appropriately.

  The monitoring signal data is represented by whether the current superimposed on the potential level area lower than the threshold value Vst is larger or smaller than a predetermined value. In this embodiment, a current signal smaller than 10 mA represents logical data “0”, and a current signal larger than 10 mA represents logical data “1”.

  Since the transmission clock signal is a power supply voltage, each of the slave stations 4 generates an internal circuit power supply from the transmission clock signal. On the other hand, the power supply of the motor 8 that opens and closes the lid 6 is obtained from a power supply line (not shown) different from the common data signal lines DP and DN.

  In FIG. 8, the pulse width of the potential level area lower than the threshold value Vst constitutes a control data area as control data, and the control data area corresponds to the upper stage of the control / monitoring data area in FIG. Yes. Also, the current value superimposed in the potential level area lower than the threshold value Vst constitutes a monitoring data area as monitoring data, and the monitoring data area is the control / monitoring data area in FIGS. 7A and 7B. It corresponds to the lower row.

  In this embodiment, as shown in FIG. 7B, control data for each slave station 4 includes data for instructing opening of the lid 6 (lid opening) and data for instructing closing of the lid body 6 (lid closing). , Data for instructing an operation test of the lid 6 (TEST), and data (display) for instructing a display for prompting reception or replenishment.

  The lid opening data is output to instruct the slave station 4 provided in the article accommodating space where the article receiving operation or the replenishing operation is required to open the lid body 6 whenever the operation is required. The

  The lid closing data is when data indicating work completion (work completion data) is input from the worker who received the article or from the worker who replenished the article via the input unit 9 of the slave station 4 to be described later. , And output to instruct the slave station 4 that has completed the take-out operation to close the lid 6.

  The TEST data is data for designating the initial setting time for the slave station 4. After the system is newly established and before normal use, it is output to a predetermined slave station 4 that performs initial setting according to the IDX table.

  The display data, together with the lid opening data, indicates to the slave station 4 provided in the article storage space where the article receiving operation or the replenishment operation is required, every time an operation is required, the instruction display of the slave station 4 to be described later It is output to make the part 7 a desired display.

  As shown in FIG. 7 (b), the monitoring data for each slave station 4 includes end confirmation data (SW) by the worker who receives or replenishes, and an abnormality indicating that the opening / closing operation of the lid 6 is abnormal. It consists of data (Abnormal 1, Abnormal 2, Abnormal 3, Abnormal 4).

  After the control / monitor data area, a management data area is provided as shown in FIGS. 7 (a) and 7 (b). In FIGS. 7A and 7B, the upper stage is an area where data is output from the master station (hereinafter referred to as a management control data area), and the lower stage is an area where data is input to the parent station ( Hereinafter, the management monitoring data area is shown.

  In the management control data area, the first management control data ISTo for instructing the slave station 4 to request information and the second management control data IDXo for specifying the slave station address are superimposed from the master station 2. Is done. Further, the first management monitoring data STi and the second management monitoring data IDXi corresponding to the first management control data ISTo from the slave station 4 specified by the second management control data IDXo are superimposed on the management monitoring data area.

  The master station input unit 25 includes a monitoring signal detection unit 35 and a monitoring data extraction unit 36. The monitoring signal detection means 35 detects the monitoring signal superimposed on the common data signal lines DP and DN from the slave station 4.

  The monitoring signal data (abnormal 1 data, abnormal 2 data, abnormal 3 data, abnormal 4 data, SW data) is, as described above, whether the current superimposed on the potential level lower than the threshold Vst is larger or smaller than 10 mA. The monitor signal is received from each of the slave stations 4 after the start signal ST is transmitted. Then, the monitoring signal detected by the monitoring signal detection unit 35 is delivered to the monitoring data extraction unit 36.

  The monitoring data extracting unit 36 extracts monitoring data (abnormality 1 data, abnormal 2 data, abnormal 3 data, abnormal 4 data, SW data) and management monitoring data in synchronization with the timing from the timing generation unit 32, and serially extracts them. Is sent to the input data section 26 as input data. In the IDX table creation process, when a response from the slave station 4 is extracted for the address designated by the master station 2, the response is delivered to the management data unit 22. Receiving this, the management data unit 22 stores the head address at that time in the storage unit 29 as data of the IDX table, as described above.

  The input data unit 26 converts the serial input data received from the monitoring data extraction unit 36 into parallel data, and sends it to the input / output unit 12 of the control unit 1 as monitoring data and management monitoring data.

<Substation configuration>
As shown in FIG. 3, the slave station 4 includes a transmission receiving means 41, an address extracting means 42, an address setting means 43, a monitoring data transmitting means 44, a control data extracting means 45, a lid movement detecting means 46, a moving time measuring means. 47. Slave station input / output unit having travel time storage means 48, management control data extraction means 53, management monitoring data transmission means 54, output means 71, warning output means 72, drive means 81, input means 91 and sensor input means 92 40.

  The slave station 4 of this embodiment includes an MCU which is a microcomputer control unit as an internal circuit, and this MCU functions as the slave station input / output unit 40. Calculations and storages necessary for the processing are executed using the CPU, RAM, and ROM included in the MCU. The CPU, RAM, and ROM in the processing of each of the above-described units constituting the slave station input / output unit 40 For the sake of convenience of explanation, the relationship between and is assumed to be omitted.

  The transmission receiving means 41 receives the transmission signal transmitted to the common data signal lines DP and DN via the slave station line receiver 51, and receives this through the address extracting means 42, the management control data extracting means 53, and the management monitoring data transmitting means. Deliver to 54.

  The address extraction means 42 counts the pulses of the transmission clock signal starting from the start or end of the start signal ST indicating the start of the transmission data signal and having a plurality of transmission data signals each having a predetermined time width as one cycle. . Then, at the timing when the count value coincides with the local address data set by the address setting means 43, the monitoring data transmitting means 44 is validated and the transmission reception signal is delivered to the control data extracting means 45.

  Note that the monitoring address for enabling the monitoring data transmitting unit 44 and the control address for passing the transmission reception signal to the control data extracting unit 45 are set in the address setting unit 43, and these monitoring address and control address are the address setting unit. Delivered to 43.

  When the monitoring data transmission unit 44 is validated by the address extraction unit 42, the monitoring data transmission unit 44 transmits the data delivered from the movement time measurement unit 47 and the input unit 91 to the common data signal lines DP, DN via the slave station line driver 52. Output as a monitoring signal. Note that the monitoring signal is superimposed on the monitoring data area of the transmission procedure.

  Specifically, the data delivered from the travel time measuring means 47 is output as abnormality 1 data, abnormality 2 data, abnormality 3 data, or abnormality 4 data, and the data delivered from the input means 91 is output as SW data. Is done.

  The control data extraction unit 45 extracts control data from the transmission reception signal delivered from the address extraction unit 42. Then, a signal corresponding to the content of the control data is output to the lid body movement detection means 46, the movement time measurement means 47, the output means 71, and the drive means 81.

  Specifically, in accordance with the data shown in FIG. 7B, first, an opening signal corresponding to the lid opening data is output to the driving unit 81. Further, a closing signal corresponding to the lid closing data is output to the driving means 81. Further, a display signal corresponding to the display data is output to the output means 71.

(Initial value setting)
When the control data is TEST data, first, the control data extraction unit 45 outputs an initial setting signal to the movement time measurement unit 47 and outputs an opening signal to the lid body movement detection unit 46 and the drive unit 81. When the control data extraction unit 45 receives the operation completion signal from the lid body movement detection unit 46, the control data extraction unit 45 outputs a closing signal to the lid body movement detection unit 46 and the driving unit 81.

  The control data extracting unit 45 also outputs an initial setting signal when receiving the initial setting instruction signal from the initial setting instruction detecting unit 49 as in the case where the control data is TEST data. In other words, the initial setting signal is output to the movement time measuring means 47, and the opening signal is output to the lid body movement detecting means 46 and the driving means 81. The signal is output to the lid movement detection means 46 and the drive means 81.

  The lid movement detection means 46 is a time zone until input of position data indicating the lid opening final end of the lid 6 from the sensor input means 92 when the opening signal is output from the control data extraction means 45. The lid opening time measurement signal Su is output to the movement time measuring means 47.

  The lid movement detection means 46 also has a time period until the position data indicating the lid closing end of the lid body 6 is input from the sensor input means 92 when the closing signal is output from the control data extraction means 45. The lid closing time measurement signal Sd is output to the movement time measuring means 47.

  When there is no initial setting signal output for measuring the initial operation time from the control data extraction unit 45, that is, during the normal operation, the movement time measurement unit 47 receives the lid opening time measurement signal Su from the lid movement detection unit 46. The output period is measured as the opening time tu (corresponding to the first operation time of the present invention). Further, the period during which the lid closing time measurement signal Sd is output from the lid body movement detecting means 46 is measured as the closing time td (corresponding to the second operation time of the present invention).

  On the other hand, when the initial setting time signal is output from the control data extracting means 45, the moving time measuring means 47 opens the period during which the lid opening time measuring signal Su is output from the lid movement detecting means 46 only at that time. The time tu is measured as the normal opening time tu0 (corresponding to the first initial operation time of the present invention) and stored in the moving time storage means 48. Also, only at that time, the closing time td during which the lid closing time measurement signal Sd is output from the lid movement detection means 46 is measured as the normal closing time td0 (corresponding to the second initial operation time of the present invention), This is stored in the travel time storage means 48. The travel time storage means 48 has a nonvolatile function.

(Abnormal judgment procedure)
When the opening time tu is measured, the moving time measuring means 47 further performs a comparison operation between the normal opening time tu0 and the opening time tu delivered from the moving time storage means 48, and when the closing time td is measured, Comparing the normal closing time td0 and the closing time td delivered from the travel time storage means 48 is performed.

  Then, as shown in FIG. 6, when the opening time tu deviates from the allowable opening time including the normal opening time tu0 (the range obtained by adding or subtracting the tolerance of the predetermined percentage k% to the normal opening time tu0), data indicating an abnormality (Abnormality 1 data) is delivered to the monitoring data transmission means 44, the output means 71, and the warning output means 72.

  Similarly, data indicating an abnormality (abnormality 2 data) is also monitored when the closing time td deviates from an allowable closing time including the normal closing time td0 (a range obtained by adding or subtracting a predetermined percentage k% to the normal closing time td0). The data is transmitted to the data transmission unit 44, the output unit 71, and the warning output unit 72. Since the time charts showing the opening operation and the closing operation are substantially the same, the closing operation is shown in parentheses in FIG.

  As described above, the data delivered to the monitoring data transmitting unit 44 is superimposed on the monitoring data area of the transmission procedure as a monitoring signal.

  Furthermore, when the output period of the lid opening time measurement signal Su and the lid closing time measurement signal Sd exceeds a predetermined time, the movement time measuring means 47 stops the time measurement, and even in that case, data indicating an abnormality (abnormality) 3 data) is transferred to the monitoring data transmission means 44, the output means 71, and the warning output means 72. When the opening operation or closing operation of the lid body 6 is obstructed by an obstacle or the like, the sensor 5 does not detect the end mark 62E indicating the lid opening final end of the lid body 6 or the start mark 62S indicating the lid closing final end. It is.

  Furthermore, the moving time measuring means 47 accumulates and accumulates the measured values of the opening time tu and the closing time td from the initial setting time to obtain the life accumulated current value tsc, and the predetermined life time passed from the moving time storage means 48. Comparing with the set value ts0. Then, when the lifetime integrated current value tsc exceeds the lifetime setting value ts0, data indicating an abnormality (abnormality 4 data) is delivered to the monitoring data transmission means 44, the output means 71, and the warning output means 72.

  The lifetime integrated current value tsc is delivered to the travel time storage means 48 and stored as the lifetime integrated continuation value tsc0 each time it is measured during normal operation when no initial setting signal is output. The lifetime integrated continuation value tsc0 is stored in the movement time storage means 48 even when the system is stopped due to the end of the manufacturing operation or the like, and is delivered to the movement time measurement means 47 at the next system startup. Therefore, the measured values of the opening time tu and the closing time td are accumulated from the initial setting, starting from the lifetime accumulated continuation value tsc0 at the previous operation stored in the moving time storage means 48 with the system stopped. Accumulated.

(Initial value download setting)
The normal opening time tu0 and normal closing time td0 stored in the movement time storage means 48 are the initial set value transmission means of the present invention when receiving an instruction for data upload using the management control data area of the transmission procedure from the master station 2. Is transferred to the management monitoring data transmission means 54 corresponding to.

  The management monitoring data transmission unit 54 counts pulses starting from the start signal ST of the transmission signal, and obtains the timing of the management data area. Then, based on the normal opening time tu0 and the normal closing time td0 delivered from the movement time storage means 48, a management monitoring signal is output to the common data signal lines DP and DN via the slave station line driver 52. The monitoring monitoring signal is superimposed on the management monitoring data area of the transmission procedure.

  The output normal opening time tu0 and normal closing time td0 are held in the management data unit 22 of the master station 2. Then, transmission is performed using the management control data area of the transmission procedure to the slave station 4 having the same specification different from the slave station 4 in which the normal opening time tu0 and the normal closing time td0 are set.

  In the slave station 4 designated by the management control data to receive the normal opening time tu0 and the normal closing time td0, the normal opening time tu0 and the normal closing time td0 are extracted by the management control data extracting means 53, and the moving time storage means 48 is input.

  The lifetime setting value ts0 is transmitted from the master station 2 using the management control data area of the transmission procedure, extracted by the management control data extraction unit 53, and input to the movement time storage unit 48. However, the lifetime setting value ts0 may be input to the travel time storage means 48 using an input device (not shown).

  The initial setting instruction detecting unit 49 outputs an initial setting instruction signal to the control data extracting unit 45 when the data delivered from the input unit 91 indicates an initial setting instruction (long press of a lever switch).

  The output unit 71 sets the instruction display unit 7 to a predetermined display based on the control data delivered from the control data extraction unit 45, for example, a lighting display of a predetermined color that prompts the user to take out the article. Further, when data indicating an abnormality from the travel time measuring means 47 is handed over, the instruction display unit 7 is displayed as a warning, for example, a blinking display of a predetermined color.

  The warning output unit 72 issues a warning from the warning unit 73 based on the data indicating the warning output delivered from the lid movement detection unit 46. In this embodiment, a buzzer is employed as the warning unit 73, and a warning by a blinking display of the instruction display unit 7 and a buzzer sound is issued.

  The drive unit 81 drives the motor 8 based on the data delivered from the control data extraction unit 45. For example, in the case of data indicating a state in which the storage space of the storage shelf is opened, the motor 8 is rotated (normally rotated) in a direction in which the lid 6 is in the lid open state. Conversely, if the data indicates a state in which the storage space of the storage shelf is closed, the motor 8 is rotated (reversed) in the direction in which the lid 6 is in the lid closed state.

  The input unit 91 delivers data based on the input from the input unit 9 to the monitoring data transmission unit 44 and the initial setting instruction detection unit 49. In this embodiment, a lever switch is adopted as the input unit 9, and a signal can be input to the input means 91 by long-pressing the lever switch for a predetermined time or longer. . The input unit 91 and the input unit 9 cooperate with the initial setting instruction detection unit 49 and function as the initial setting input unit of the present invention by long-pressing the lever switch for a predetermined time or longer.

  The sensor input means 92 delivers the detection position data of the lid body 6 to the lid body movement detection means 46 based on the input from the sensor 5 that detects the position of the lid body 6 interlocked with the motor 8.

<System function>
The assembly article management system functions as follows with the above-described configuration.
In assembling the article, parts are received and replenished through the control data transmitted from the master station 2 to the slave station 4 through the common data signal lines DP and DN. Specifically, the slave station 4 corresponding to the accommodation space in which the article to be received or replenished is accommodated is instructed to open, and the slave station 4 corresponding to the accommodation space in which the receiving operation or the replenishment operation is completed. Is instructed to close.

  The control data for each slave station 4 is superimposed on the transmission data signal assigned to each slave station 4 in the control / monitoring data area, that is, the transmission data signal at the timing when the control address of the slave station 4 matches the count value. The

  The slave station 4 that has extracted the control data for its own station operates the motor 8 in accordance with the instruction of the control data, and puts the lid 6 into an open state or a closed state.

  In the operation of opening the lid 6, the open time tu from the closed state to the open state is measured according to the procedure described above, and a comparison process with the normal open time tu0 is performed. Based on the result of the comparison process, the following determination can be made.

  As shown in the uppermost stage (normal time) in FIG. 6, if the opening time tu is within the allowable opening time range including the normal opening time tu0, it is determined that the operation is normal.

  As shown in the second stage (at the end of life) in FIG. 6, when the opening time tu deviates beyond the allowable opening time range including the normal opening time tu0, the bearing of the motor 8 being used It is determined that the output torque is reduced due to wear of components such as lubricating oil, the motor rotation is reduced, and the life of the device has been reached. Then, abnormality 1 data indicating that the device life of the motor 8 has been reached is output to the master station 2.

  As shown in the third stage (during idling) in FIG. 6, when the opening time tu deviates to the side smaller than the allowable opening time range including the normal opening time tu0, the lid body 6 is detached from the rotating shaft 61. Then, it is determined that the motor 8 is idle. Then, abnormality 2 data indicating that the lid 6 is not operating normally is output to the master station 2.

  In addition, as shown in the fourth row (at the time of failure) in FIG. 6, when the time measurement is stopped, it is determined that the normal operation of the lid body 6 is hindered by the presence of a foreign object such as an obstacle. Is done. Then, abnormality 3 data indicating that the operation of the lid 6 is faulty is output to the master station 2.

  As described above, the measured values of the opening time tu and the closing time td are cumulatively integrated as the lifetime integrated current value tsc and compared with a predetermined lifetime setting value ts0. Then, abnormality 4 data indicating that the lifetime integrated current value tsc exceeds the lifetime setting value ts0 is output to the master station 2.

  In the master station 2, the abnormality 1 data, the abnormality 2 data, the abnormality 3 data, and the abnormality 4 data are stored for each slave station 4. When the accumulated value and frequency value of the abnormality 1 data and the abnormality 2 data exceed a predetermined value, maintenance inspection of the slave station 4 including the motor 8, the rotating shaft 61, the lid body 6 and the like is necessary. It is judged. Further, when abnormality 4 data is output from the slave station 4, it is determined that maintenance inspection is necessary.

  Furthermore, based on the accumulated value or frequency value of the abnormality 3 data, the normality of the take-out operation or the replenishment operation in the article accommodation space is determined. For example, when the attachment state of the lid is bad, abnormality 3 data frequently occurs and it is determined that the normality is bad.

  The content determined in the master station 2 is displayed by display means (not shown) connected to the master station 2 together with information for specifying the slave station 4.

  Furthermore, when the abnormal data 3 is output from the slave station 4, it is determined that there is an abnormality at that time, and information indicating the abnormality is displayed together with information for specifying the slave station 4.

  In the operation of closing the lid 6, the closing time td from the open state to the closed state is measured and the comparison process with the normal closing time td 0 is performed according to the procedure described above. Note that the comparison process and determination are essentially the same as in the case of the opening time tu, and thus description thereof is omitted.

  When there is a slave station 4 that has been replaced with a new one due to the life or failure of the motor 8, the slave station 4 is replaced with a new one by specifying the initial setting at the slave station alone via the input unit 9 of the slave station 4. A new normal opening time tu0 and normal closing time td0 are set for the slave station 4 that has been set. In this embodiment, the lever switch that is the input unit 9 is also used to input work end data for receiving or replenishing, but the lever switch is pressed for a short time in the operation of inputting work end data, In the operation for designating the initial setting time, the lever switch is pressed for a predetermined time or longer. Therefore, the slave station 4 recognizes the initial setting instruction for specifying the initial setting time and the work end data without being confused.

  The designation at the time of initial setting to the slave station 4 replaced with a new one may be performed via the master station 2. In this case, the master station 2 outputs TEST data as control data for the slave station 4 replaced with a new one. At this time, since the TEST data is output only to the slave station 4 exchanged for a new one, the other slave stations 4 maintain normal operation.

  In this embodiment, the sign 6 is a relative code, but there is no limitation on the method of detecting the position as long as the opening / closing of the lid 6 can be confirmed. For example, the same control can be performed by detecting the sign 6 as an absolute code, making the predetermined absolute code correspond to the start and end, and performing coincidence control by the lid movement detection means 46.

  In this embodiment, a plurality of slave stations 4 are connected to the common data signal lines DP and DN, and data is exchanged by the transmission synchronization method, but the data exchange method is not limited. For example, data may be exchanged with a plurality of slave stations connected by a transmission line by a command method. Further, a plurality of slave stations may not be connected by transmission lines, but may be connected by a plurality of lines to a master station paired with each slave station, and the master station and the slave stations may directly exchange data on a one-to-one basis.

  Further, there is no restriction on the method of connecting the master station 2 and the plurality of slave stations 4, even if the master station 2 and each of the slave stations 4 are connected by wireless communication without direct transmission, and exchange data directly. Good.

DESCRIPTION OF SYMBOLS 1 Control part 2 Master station 4 Slave station 5 Sensor 5a, 5b, 5c Optical sensor 6 Cover body 7 Instruction display part 8 Motor 9 Input part 11 Management judgment means 12 Input / output unit 21 Output data part 22 Management data part 23 Timing generation part 24 Master station output unit 25 Master station input unit 26 Input data unit 29 Storage means 31 Oscillation circuit (OSC)
32 Timing generation means 33 Control data generation means 34 Line driver 35 Monitoring signal detection means 36 Monitoring data extraction means 40 Slave station input / output unit 41 Transmission reception means 42 Address extraction means 43 Address setting means 44 Monitoring data transmission means 45 Control data extraction means 46 Lid movement detection means 47 Movement time measurement means 48 Movement time storage means 49 Initial setting instruction detection means 51 Slave station line receiver 52 Slave station line driver 53 Management control data extraction means 54 Management monitoring data transmission means 61 Rotating shaft 62 Mark 62A Angle indicator 62S Start indicator 62E End indicator 71 Output means 72 Warning output means 73 Warning section 81 Drive means 91 Input means 92 Sensor input means DP, DN Data signal line

Claims (5)

Each of the plurality of article storage spaces has a lid that opens and closes the outlet of the article storage space, and a slave station that can exchange data with the master station is installed,
The slave station is
Measuring means for measuring a first operation time for the lid to open the article accommodation space and a second operation time for the lid to close the article accommodation space;
Initial setting input means for specifying any initial setting time;
When the initial setting time is instructed by an input operation via the initial setting input means, the first operating time measured at the initial setting is set as the first initial operating time, and measured at the initial setting time. an initial setting value storing means you the memorize a second operating time as a second initial operation time that is,
Before Symbol comparison of the first operating time and the first initial operation time, or based on a comparison of the second operating time and the second initial operation time, it determines the arrival of device life of the drive means of the lid Arithmetic processing means;
An article management system for assembly, comprising:   2. The assembly article management system according to claim 1, wherein the initial setting time is instructed from the master station to the slave station.   When the first operation time deviates from a range of an allowable open time obtained by adding or subtracting a predetermined percentage tolerance to the first initial operation time, or the second operation time When it deviates from the range of the allowable closing time obtained by adding or subtracting a predetermined percentage tolerance to the second initial operation time, it is determined that the device life of the driving means of the lid has come. The assembly article management system according to 1 or 2.   The arithmetic processing means compares a lifetime integrated current value that is a cumulative value from the initial setting time of the first operating time and the second operating time with a predetermined lifetime setting value, and the lifetime integrated current value is The assembly article management system according to any one of claims 1 to 3, wherein the assembly article management system is determined to be larger than a set value for the lifetime. The slave station, when the lifetime accumulated current value becomes larger than the lifetime setting value, outputs the presence / absence of cumulative excess to the master station, the master station based on the presence / absence of cumulative excess, The assembly article management system according to claim 4, wherein the necessity of maintenance inspection is determined.

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