JP7709844B2 - Construction machinery manufacturing management system - Google Patents

Description

The present invention relates to a manufacturing management system for construction machinery, and in particular to technology for streamlining the manufacturing line.

Generally, hydraulic excavators are manufactured separately into a lower traveling body and an upper rotating body. That is, in the manufacturing process of a hydraulic excavator, the lower traveling body and the upper rotating body are each manufactured up to a predetermined stage, and then the upper rotating body is mounted on the lower traveling body. Here, for example, in the manufacturing process of the upper rotating body, there are multiple steps such as a processing step, a cutting step, and an assembly step (Patent Document 1).

JP 2014-095198 A

However, in a manufacturing process having multiple steps such as the technology disclosed in Patent Document 1, the manufacturing process may be delayed due to a shortage of parts, etc. When the manufacturing process is delayed in this way, the timing for combining the lower traveling body (first work-in-progress) and the upper rotating body (second work-in-progress) may be delayed, and manufacturing may not proceed as planned.

In such a case, there is a risk that the production process will remain stalled until the production of a product (successor product) that is produced on the same production line after the product that is stalled (stagnant product). Therefore, it is possible to remove the stalled product from the production line and produce the successor product first. However, there is a possibility that the manager who issues the instruction to remove such a stalled product from the production line will not realize that production is stalled in the production process, leaving room for further improvement in the management of the production line.

The present invention was made in consideration of these problems, and its purpose is to provide a construction machinery manufacturing management system that can recognize delays in the manufacturing process at the manufacturing site.

In order to achieve the above object, the present invention provides a construction machine manufacturing management system which manufactures a first component of a construction machine as a first work-in-progress in a first work-in-progress manufacturing line, manufactures a second component of the construction machine as a second work-in-progress in a second work-in-progress manufacturing line, and manufactures the construction machine as a finished product by combining the first work-in-progress and the second work-in-progress in a completion line, the system comprising a first monitoring unit which monitors the manufacturing status of the first work-in-progress in the first work-in-progress manufacturing line, a second monitoring unit which monitors the manufacturing status of the second work-in-progress in the second work-in-progress manufacturing line, a monitor which displays predetermined information to an administrator, and a control device for controlling the predetermined information to be displayed on the monitor, the control device comprising a delay determining section for determining whether or not a delay has occurred in the manufacturing process of the first work-in-progress manufacturing line based on the manufacturing status of the first work-in-progress monitored by the first monitoring unit, and for determining whether or not a delay has occurred in the manufacturing process of the second work-in-progress manufacturing line based on the manufacturing status of the second work - in-progress monitored by the second monitoring unit ; The horizontal axis represents time, and the vertical axis represents one of the manufacturing processes of the first work-in-progress production line, the second work-in-progress production line, and the finished line, and one line connects the start to completion of the production of one of the first work-in-progress products on the first work-in-progress production line, one line connects the start to completion of the production of one of the second work-in-progress products on the second work-in-progress production line, and one line connects the start to completion of the production of one of the first work-in-progress products on the first work-in-progress production line and the completion of the production of one of the second work-in-progress products on the second work-in-progress production line and the completion of the production of one of the first work-in-progress products on the finished line. the start of the joining of the one first work-in-process and the one second work-in-process on the completed line is connected by a line to the start of the joining of the one first work-in-process and the one second work-in-process on the completed line is connected by a line to the completion of the manufacture of the one construction machine as the finished product ; and an output unit that outputs data displaying information indicating that a delay is occurring in the manufacturing process of a work-in-process manufacturing line for which a delay is determined to be occurring in the manufacturing process by the delay determination unit, of the first work-in-process manufacturing line and the second work-in-process manufacturing line.

Thereby, a delay in at least one of the manufacturing processes of the first work-in-process manufacturing line and the second work-in-process manufacturing line is determined by the delay determination unit based on the manufacturing status of the first work-in-process on the first work-in-process manufacturing line and the second work-in-process on the second work-in-process manufacturing line monitored by the first monitoring unit and the second monitoring unit , and the output unit outputs to the monitor one line each of a start to completion of manufacturing of one first work-in-process on the first work-in-process manufacturing line and one second work-in-process on the second work-in-process manufacturing line, a time from the completion of manufacturing of the one first work-in-process and the one second work-in-process to the start of combining the one first work-in-process and the one second work-in-process on the completed line, and a time from the start of combining the one first work-in-process and the one second work-in-process on the completed line to the completion of manufacturing of one construction machine as a completed product. Therefore, by connecting and displaying on a graph, and outputting data indicating information on a delay in at least one of the manufacturing processes of the first work-in-progress production line and the second work-in-progress production line as determined by the delay determination unit, the manufacturing progress from the start of manufacturing of each work-in-progress on each work-in-progress production line to the joining of each work-in-progress on the completed line, and then the completion of manufacturing of one construction machine as a finished product on the completed line can be displayed on a graph without complicating the process, making it possible to recognize delays in the manufacturing processes at the manufacturing site.For example, a manager in charge of the manufacturing site can give accurate instructions to workers at the manufacturing site based on the information on the delay in at least one of the manufacturing processes of the first work-in-progress production line and the second work-in-progress production line output on the monitor.

In another aspect, the control device has a plan input unit to which the production plans of the first work-in-progress production line and the second work-in-progress production line are input, the delay determination unit determines whether or not a delay has occurred in the production process of the first work-in-progress production line and the second work-in-progress production line by comparing the production plan input to the plan input unit with the production status of the first work-in-progress and the second work-in-progress, and the output unit preferably displays information indicating the production plan input to the plan input unit on the graph and outputs data to the monitor that displays information indicating that the delay has occurred.

This makes it possible to compare the production plan input to the plan input section with the production status of the first work-in-process on the first work-in-process production line and the second work-in-process on the second work-in-process production line to determine a delay in at least one of the production processes on the first work-in-process production line and the second work-in-process production line, and to display the production plan related to the production plan input to the plan input section on a graph and to display information on the delay, thereby making it possible to clearly show the difference between the production plan and the production status while displaying information on the delay in at least one of the production processes on the first work-in-process production line and the second work-in-process production line.

In another aspect, the output unit preferably outputs data to the monitor to cause a graph showing the production status of a work-in-progress production line that has been determined to be delayed by the delay determination unit to flash.

As a result, the output unit blinks the graph showing the production status of the work-in-progress production line that has been determined to be delayed by the delay determination unit, making it possible to clearly identify the delayed production line.

In another embodiment, the first work-in-progress and the second work-in-progress are provided with information storage devices that store information identifying the first work-in-progress and the second work-in-progress, and the first monitoring unit and the second monitoring unit are arranged in multiple units on the first work-in-progress production line and the second work-in-progress production line, and it is preferable that the information storage devices are information reading devices that extract information stored in the information storage devices that pass through the first monitoring unit and the second monitoring unit.

As a result, by extracting information stored in an information storage device that passes through an information reading device among multiple information storage devices arranged on the first work-in-progress production line and the second work-in-progress production line, it is possible to reliably monitor which process the first work-in-progress and second work-in-progress are in.

In another aspect, the first monitoring unit and the second monitoring unit preferably have an imaging device arranged to capture images of at least one process in the first work-in-progress production line and the second work-in-progress production line, and the delay determination unit preferably determines a delay in the process captured by the imaging device based on the image captured by the imaging device.

This allows the delay determination unit to determine the delay in the process in which the imaging device captures images based on the video captured by the imaging device, making it possible to appropriately determine the delay within each process.

In another embodiment, at least one of the first work-in-progress and the second work-in-progress is provided with a transmitter that transmits position information of at least one of the first work-in-progress and the second work-in-progress, at least one of the first monitoring unit and the second monitoring unit is a receiver that receives the position information of at least one of the first work-in-progress and the second work-in-progress transmitted from the transmitter, and it is preferable that the delay determination unit determines the delay based on the position information of at least one of the first work-in-progress and the second work-in-progress received by the receiver.

As a result, by receiving the location information of at least one of the first work-in-progress and the second work-in-progress transmitted from the transmitter by the receiver and determining the delay based on the location information of at least one of the first work-in-progress and the second work-in-progress, it becomes possible to monitor delays caused by traffic congestion or the like that occur during the movement, even when, for example, the work-in-progress is moved to a different site when moving to the next process.

In another embodiment, the monitor is preferably included in a portable tablet device.

This allows the manager to carry the tablet terminal and monitor the manufacturing site while performing other tasks by outputting information about delays in at least one of the manufacturing processes of the first work-in-progress production line and the second work-in-progress production line to the monitor included in the portable tablet terminal.

According to the construction machine production management system of the present invention, a delay in at least one of the production processes of the first work-in-process production line and the second work-in-process production line is determined by the delay determination unit based on the production status of the first work-in-process on the first work-in-process production line and the second work-in-process on the second work-in-process production line monitored by the first monitoring unit and the second monitoring unit, and the output unit outputs to the monitor a time period from the start to the completion of production of one first work-in-process on the first work-in-process production line and one second work-in-process on the second work-in-process production line, from the completion of the production of the one first work-in-process and the one second work-in-process to the start of combining the one first work-in-process and the one second work-in-process on the completion line, and from the start of combining the one first work-in-process and the one second work-in-process on the completion line to the completion of production of one construction machine as a finished product. Each of the work-in-progress production lines is connected by a line and displayed on a graph, and data indicating information on a delay in at least one of the production processes of the first work-in-progress production line and the second work-in-progress production line determined by the delay determination unit is output. Therefore, the production progress from the start of production of each work-in-progress production line on each work-in-progress production line to the combination of each work-in-progress production line on the completed line, and then the completion of production of one construction machine as a completed product on the completed line can be displayed on a graph without complicating the process, making it possible to recognize delays in the production processes at the production site. For example, a manager in charge of the production site can give accurate instructions to workers at the production site while looking at a monitor based on the information about delays in at least one of the production processes of the first work-in-progress production line and the second work-in-progress production line output on the monitor.

FIG. 1 is a schematic diagram of a finished hydraulic excavator manufacturing line having a lower traveling body and an upper rotating body. FIG. 2 is a block diagram showing a connection configuration of a control unit related to control of the management system according to the present invention. 11 is a flowchart of a routine showing a control procedure of data combination processing control executed by a data combination unit of the calculation unit. 1 is a graph showing the progress of production of a single hydraulic excavator, with the horizontal axis indicating time and the vertical axis indicating the production line. 11 is a flowchart of a routine showing a control procedure of delay determination control executed by a delay determination unit of the calculation unit. 11 is a graph that is displayed on a liquid crystal monitor of a display unit when the hydraulic excavator is manufactured according to the manufacturing plan. 13 is a graph displayed on a liquid crystal monitor of a display unit when a delay occurs in the manufacturing process of a hydraulic excavator.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1, there is shown a schematic diagram of a finished product production line 1 for a hydraulic excavator 100 having a lower traveling body 101 and an upper rotating body 102. The hydraulic excavator 100 is a finished product that is completed by combining work-in-progress produced by a plurality of work-in-progress production lines. Specifically, a finished product production line (production line) 1 for producing the hydraulic excavator 100 includes a first work-in-progress production line 11, a second work-in-progress production line 12, and a finished product line 13. In addition, a detection unit 3 (3a, 3b) is provided in the finished product production line 1, and a control unit (control device) 5 and a display unit 7 are provided at positions away from the finished product production line 1 and the detection unit 3.

The first work-in-progress production line 11 has a first process 21 and a second process 22, and is a production line capable of producing a lower running body (first component) 101 by carrying out the processes in the order of the first process 21 and the second process 22. The second work-in-progress production line 12 has a third process 23 and a fourth process 24, and is a production line capable of producing an upper rotating body (second component) 102 by carrying out the processes in the order of the third process 23 and the fourth process 24. The completed line 13 has a joining process 25, and is a production line capable of joining the lower running body (first work-in-progress) 101 manufactured on the first work-in-progress production line 11 and the upper rotating body (second work-in-progress) 102 manufactured on the second work-in-progress production line 12 in the joining process 25, and then completing the hydraulic excavator (finished product) 100.

The finished product production line 1 also has an additional process 26. The additional process 26 is a process used temporarily to temporarily evacuate the lower traveling body 101, the upper rotating body 102, and the hydraulic excavator 100 on the first work-in-progress production line 11, the second work-in-progress production line 12, and the finished product line 13, and to make repairs as necessary.

The detection unit 3 is a general term for sensors and the like that detect the progress of each process in the finished product production line 1 and monitor the production status. Specifically, the detection unit 3 includes an RFID reader (information reading device) 31, a video camera (imaging device) 35, and a receiver 37. For ease of explanation, among the detection units 3, the sensors and the like used in the first work-in-progress production line 11 are referred to as the first detection unit (first monitoring unit) 3a, and the sensors and the like used in the second work-in-progress production line 12 are referred to as the second detection unit (second monitoring unit) 3b.

The RFID reader 31 is a reading device capable of reading (extracting) information stored in an RFID (Radio Frequency Identifier) tag 33. This RFID reader 31 is disposed at a position where each process, such as the first process 21 to the fourth process 24, the joining process 25, the adding process 26, etc., is performed. Meanwhile, the RFID tag (information storage device) 33 is attached to, for example, the frame of the lower traveling body 101 or the upper rotating body 102, and stores identification information such as the product number of the lower traveling body 101. Therefore, by reading the RFID tag 33 at each process, the RFID reader 31 can detect information such as when a product with a product number of the lower traveling body 101 or the upper rotating body 102 entered and exited which process, and monitor the manufacturing status.

The video camera 35 is an imaging device disposed at the position where each process is performed, and is capable of capturing images of the situation in which each process is being performed. The receiver 37 is a communication device capable of receiving information transmitted from the transmitter 39. This receiver 37 is disposed near the control unit 5. On the other hand, the transmitter 39 is a communication device capable of identifying its own current location by GPS (Global Positioning System) or the like, and is disposed, for example, on a pallet 104 carrying the lower body 101 after the second process 22. Therefore, when the lower body 101 after the second process 22 is moving toward the location where the completion line 13 is performed, the receiver 37 can specifically identify the current location of the lower body 101 via the pallet 104 on which the transmitter 39 is disposed, and monitor the manufacturing situation.

The display unit 7 is a tablet terminal having a liquid crystal monitor (monitor) 7a, and can communicate with the control unit 5. The display unit 7 can display image data (predetermined information) transmitted from the control unit 5 on the liquid crystal monitor 7a. The display unit 7 can also input information by directly touching the liquid crystal monitor 7a. For ease of explanation, a virtual keyboard or a touch operation detection unit for inputting information on the liquid crystal monitor 7a is referred to as the input unit 7b (see FIG. 2).

Referring to FIG. 2, a block diagram shows the connection configuration of the control unit 5 involved in controlling the management system according to the present invention. The control unit 5 is a high-speed calculation processing device that performs the overall control of the management system according to the present invention. This control unit 5 has a calculation unit 41, a plan input unit 43, a memory unit 45, and an output unit 47.

The calculation unit 41 is a calculation unit that performs judgments, etc. based on input information. Specifically, the calculation unit 41 has a data combination unit 51, a delay judgment unit 53, and a plan comparison unit 55. The data combination unit 51 is capable of executing data combination process control that consolidates overlapping information after the combination process 25. The delay judgment unit 53 is capable of determining delays in the manufacturing process in the finished product manufacturing line 1. The plan comparison unit 55 is capable of comparing the manufacturing results (manufacturing status) in the finished product manufacturing line 1 with the manufacturing plan.

The plan input unit 43 is an input unit to which information regarding the overall manufacturing plan of the finished product production line 1 is input, which is input by the manager by operating the input unit 7b of the display unit 7. The storage unit 45 is a memory that stores various calculation results by the calculation unit 41 and information input to the plan input unit 43. The output unit 47 is an output unit that calculates and outputs information to be displayed on the liquid crystal monitor 7a of the display unit 7 based on the calculation results by the calculation unit 41.

Here, the RFID reader 31, the video camera 35, the receiver 37, and the display unit 7 are connected to the input side of the control unit 5 so as to be capable of communicating information, for example. As a result, the control unit 5 receives input from the RFID reader 31 of identification information such as the product number stored in the RFID tag 33 and information relating to the time when the RFID tag 33 was read, input from the video camera 35 of information relating to the status of each process carried out in the first process 21 and the third process 23, input from the receiver 37 of positional information over time of the pallet 104 carrying the lower traveling body 101 after the second process 22, and input from the display unit 7 of information relating to the overall manufacturing plan of the finished product production line 1 input via the input unit 7b.
On the other hand, the display unit 7 is communicatively connected to the output side of the control unit 5, and information calculated by the output section 47 of the control unit 5 is displayed on a liquid crystal monitor 7a.

Referring to FIG. 3, a routine showing the control procedure for data combination processing control executed by the data combination unit 51 of the calculation unit 41 is shown in a flowchart. Below, the control procedure for data combination processing control will be explained according to the flowchart.

In step S1, data having combination flag data (combined data) is extracted from the data input from the RFID reader 31, the video camera 35, and the receiver 37, and the process proceeds to step S2. Here, combination flag data refers to multiple pieces of information linked to RFID tags 33 when multiple RFID tags 33 are read simultaneously by the RFID reader 31, for example.

In step S2, it is determined whether or not combined data has been extracted in step S1. If the determination result in step S2 is false (No), meaning that combined data has not been extracted, the process returns to step S1. On the other hand, if the determination result in step S2 is true (Yes), meaning that combined data has been extracted, the process proceeds to step S3. As a result, steps S1 and S2 are repeated until combined data is extracted (No in step S2), and once combined data has been extracted (Yes in step S2), the process proceeds to step S3.

In step S3, the component names of each piece of data in the combined data extracted in step S1 are extracted, and the process proceeds to step S4. Here, the component names refer to the product names that make up the hydraulic excavator 100, such as the lower traveling body (first component) 101 and the upper rotating body (second component) 102. Next, in step S4, data from the combining process 25 onwards is deleted from the multiple component names extracted in step S3, except for data relating to a preset representative component name, and the process proceeds to step S5. Then, in step S5, the labels in the graph (labels 61 and 62 in the graph in Figure 4 described later) of the data of the representative component from the combining process 25 onwards are changed to a name (label 63) that indicates the product after the combining process, and the process proceeds to step S6.

Therefore, in steps S3 and S4, the data from the combining process 25 onwards can be narrowed down to data related to a preset representative component name, preventing data duplication. In addition, in step S5, labels 61 and 62 in the graph can be unified to label 63, which is the name of the combined product, which is the data of the representative component from the combining process 25 onwards.

In step S6, the information calculated in steps S1 to S5 is stored in the memory unit 45 as manufacturing performance data, the routine ends, and the routine is repeated again. This allows the manager to consider improvements to the finished product production line 1 based on the manufacturing performance data stored in the memory unit 45.

Figure 4 is a graph showing the progress of manufacturing the hydraulic excavator 100 alone, with the horizontal axis showing time and the vertical axis showing each manufacturing line. According to this graph, the first process 21 for the lower traveling body 101 starts at 8:00 and is completed at 8:20, the second process 22 starts at 9:10 and is completed at 10:00, and the joining process 25 starts at 10:50. Meanwhile, the third process 23 for the upper rotating body 102 starts at 7:00 and is completed at 7:50, the fourth process 24 starts at 8:40 and is completed at 9:30, and the joining process 25 starts at 10:50. Then, in the processes after the joining process 25 on the completion line 13, the hydraulic excavator 100 formed by joining the lower traveling body 101 and the upper rotating body 102 is manufactured.

Therefore, by executing the data combination process control by the data combination unit 51, it is possible to bundle the overlapping information from the combination process 25 onwards into a single piece of information. Therefore, the data combination process control can reduce the amount of data managed by the control unit 5 and specify the display name to be displayed on the graph from the combination process 25 onwards. Then, in step S6, the information calculated by the data combination process control is stored in the memory unit 45, so that the manufacturing performance of the hydraulic excavator 100 described above in the data combination process control is stored as manufacturing performance data, and the manufacturing performance data can be stored cumulatively thereafter.

Referring to FIG. 5, a flow chart shows a routine indicating the control procedure of the delay judgment control executed by the delay judgment unit 53 of the calculation unit 41. Below, the control procedure of the delay judgment control will be explained according to the flow chart.

In step S101, a product for which a delay judgment is to be made is selected, and the process proceeds to step S102. Specifically, in step S101, a product manufactured during a time period designated by the manager via the input section 7b of the display unit 7 is selected as a product for which a delay judgment is to be made. In step S102, the manufacturing data of the product selected in step S101 is converted into a graph, output, and the process proceeds to step S103. Therefore, in steps S101 and S102, the manufacturing data for the time period designated by the manager can be displayed in a graph on the liquid crystal monitor 7a of the display unit 7 (see FIG. 4 and FIGS. 6 and 7 described below).

In step S103, it is determined whether or not there is any data in the manufacturing data of the product selected in step S101 in which the execution time of the process is equal to or greater than a certain value. Here, the certain value is, for example, a value obtained by dividing the distance of the target process of the belt conveyor that extends over the first work-in-progress production line 11 or the second work-in-progress production line 12, on which the lower running body 101 or the upper rotating body 102 is mounted and which drives at a constant speed, by the speed of the belt conveyor. If the determination result in step S103 is false (No), and it is determined that there is no data in which the time interval between processes is equal to or greater than the certain value, the process proceeds to step S106, and if the determination result in step S103 is true (Yes), and it is determined that there is data in which the time interval between processes is equal to or greater than the certain value, the process proceeds to step S104.

In step S104, the system indicates that there is a process related to data in which the time interval between processes is equal to or greater than a certain value, i.e., that there is a process in which production is delayed, for example by encircling the relevant process on the graph with a blinking circle C (see FIG. 7 described later), and then proceeds to step S105. In step S105, the image captured by the video camera 35 in the delayed process is output to the output unit 47 as a small window W (see FIG. 7 described later), and then proceeds to step S106.

Therefore, in steps S103 to S105, any process that is experiencing a delay such that the process execution time is equal to or greater than a certain value is detected and the manufacturing status is monitored (step S103), the process in question is surrounded by a blinking circle C (step S104), and an image of that process captured by the video camera 35 (S108) is displayed on the liquid crystal monitor 7a of the display unit 7 via the output section 47. This makes it possible to make the manager aware that a delay is occurring in that process, and to convey the current state of that process to the manager through the image.

After step S105, in steps S106 to S108, the plan matching control is performed by the plan matching unit 55. In step S106, based on the information about the manufacturing plan for the entire finished product manufacturing line 1 input to the plan input unit 43, it is determined whether there is manufacturing data for a process in which the time difference between the manufacturing plan and the actual manufacturing results is equal to or greater than a specified value. Here, the specified value may be, for example, about 20 minutes.

If the result of the determination in step S106 is false (No), and it is determined that there is no process in which the time difference between the manufacturing plan and the manufacturing results is equal to or greater than the specified value, the delay determination control ends. On the other hand, if the result of the determination in step S106 is true (Yes), and it is determined that there is a process in which the time difference between the manufacturing plan and the manufacturing results is equal to or greater than the specified value, the process proceeds to step S107.

In step S107, the manufacturing plan for the process in which the time difference between the manufacturing plan and the actual manufacturing result is equal to or greater than a specified value is output in the form of a graph via the output unit 47, and the process proceeds to step S108. In step S108, the graph of the actual value for the product in which the time difference between the manufacturing plan and the actual manufacturing result is equal to or greater than a specified value is caused to flash, and the delay determination control is terminated.

Therefore, in steps S106 to S108, the system monitors the production status where production is significantly behind schedule, such as when the time difference between the production plan and the production results is equal to or greater than a specified value (step S106), and displays a graph related to the production plan (S107) and a flashing graph of the results (S108) on the liquid crystal monitor 7a of the display unit 7.

Referring to FIG. 6, a graph is shown on the liquid crystal monitor 7a of the display unit 7 when the hydraulic excavator 100 is manufactured according to the manufacturing plan. Also, referring to FIG. 7, a graph is shown on the liquid crystal monitor 7a of the display unit 7 when a delay occurs in the second process 22 of the first work-in-progress manufacturing line 11 in the lower traveling body A.

The effect of the delay judgment control will be explained below with reference to Figures 5 to 7. For ease of explanation, the hydraulic excavator 100 whose manufacture started first will be referred to as hydraulic excavator A, and the hydraulic excavator 100 whose manufacture started after hydraulic excavator A will be referred to as hydraulic excavator B. Similarly, for the lower running body 101 and the upper rotating body 102, the ones whose manufacture started first will be referred to as lower running body A and upper rotating body A, and the ones whose manufacture started after lower running body A and upper rotating body A will be referred to as lower running body B and upper rotating body B. Furthermore, the open circles on the graphs in Figures 6 and 7 indicate the start of the process, and the black circles indicate the end of the process.

First, referring to Figures 5 and 6, a case where both hydraulic excavators A and B were manufactured according to the manufacturing plan (case 1) will be described. When the manager specifies hydraulic excavators manufactured between 7:00 and 17:00 via the input section 7b of the display unit 7 (step S101), the manufacturing data for hydraulic excavators A and B is displayed on the liquid crystal monitor 7a of the display unit 7 in the form of a graph as shown in Figure 6 (step S102).

Here, both hydraulic excavators A and B are manufactured according to the manufacturing plan, so there is no data where the time interval between processes is greater than a certain value (No in step S103), and there is no process where the time difference between the manufacturing plan and the actual manufacturing results is greater than a specified value (No in step S106), so the blinking circle C (step S104) and the small window W (step S105) are not displayed, and only the graph is displayed on the liquid crystal monitor 7a of the display unit 7.

As shown in the graph of FIG. 6, the data combining unit 51 executes data combining process control, and the graphs from the combining step 25 onwards can be combined into one line each for hydraulic excavators A and B, preventing the graph from becoming too complicated. In addition, by displaying labels 61, 62, and 63 on the graph, it is easy to recognize which product each line on the graph represents.

Next, referring to Figures 5 and 7, we will explain the differences from Case 1 in the case where a delay occurs in the production of the undercarriage A of the hydraulic excavator A in the second process 22 of the first work-in-progress production line 11 (Case 2).

7, a delay occurs in the production of the lower running body A in the second process 22 of the first work-in-progress production line 11, and therefore the time from when the lower running body A is put into the second process 22 until it is taken out, i.e., the execution time of the second process 22, is equal to or greater than a certain value (Yes in step S103). Therefore, in case 2, in order to make the manager aware of the delay in the second process 22, an image is displayed on the liquid crystal monitor 7a of the display unit 7, in which the second process 22 is surrounded by a blinking circle C (step S104) and a small window W is positioned in the upper right part of the graph (step S105).

This allows the manager to easily recognize from the blinking circle C in the graph displayed on the liquid crystal monitor 7a of the display unit 7 that a delay has occurred in the manufacturing of the lower running body A in the second process 22 for some reason. In addition, the image captured by the video camera 35 in the second process 22 is displayed in the small window W, allowing the manager to determine the cause of the delay occurring in the second process 22 based on the image captured by the video camera 35.

In this way, the manager who recognizes the delay in the production of lower running body A in the second process 22 can instruct the worker to move lower running body A at the second process 22 to the additional process 26, thereby positioning lower running body B at the second process 22 in place of the preceding lower running body A (see Figure 7).

On the other hand, at the time of the second judgment in FIG. 7, if the lower running body B is positioned in the second process 22 instead of the lower running body A at the time of the first judgment, the lower running body B can carry out the second process 22 earlier than the manufacturing plan. Also, by carrying out the second process 22 of the lower running body B earlier than the manufacturing plan, a difference between the manufacturing results and the manufacturing plan for the second process 22 of the lower running body B may occur that is greater than a specified value (Yes in step S106). Therefore, in case 2, in order to show the manufacturing plan of the lower running body B as an indicator to the manager, the manufacturing plan is displayed in a graph (step S107), and the graph of the actual value is made to flash (step S105).

In this way, the manager, who is shown the graph of the manufacturing plan for the lower running body B as an indicator, can instruct the workers to advance the manufacturing of the lower running body B, the upper rotating body B, and the hydraulic excavator B ahead of schedule while taking into consideration the graph of the manufacturing plan. In addition, by displaying the manufacturing plan for the lower running body B, whose manufacturing began after the lower running body A, it is possible to easily consider to what extent the manufacturing of the lower running body B, the upper rotating body B, and the hydraulic excavator B needs to be advanced from schedule in order to reduce delays occurring in the manufacturing plan for the lower running body 101, whose manufacturing begins after the lower running body B.

In particular, the data combining unit 51 executes data combining process control and combines overlapping information from combining process 25 onwards into a single piece of information, so that even if irregular measures are taken such as accelerating the manufacture of the lower traveling body B, the upper rotating body B and the hydraulic excavator B earlier than planned, the graphs from combining process 25 onwards can be prevented from becoming complicated.

Next, another example of this embodiment will be described. In this example, the start and end of each process are detected and determined based on the image captured by the video camera 35. As a result, even if the product being manufactured is one for which it is difficult to attach an RFID tag 33, it is possible to generate combination flag data and output graphs based on the image captured by the video camera 35, and ultimately to determine delays in each process based on the image captured by the video camera 35.

As described above, the construction machinery manufacturing management system according to the present invention is a management system for a finished product manufacturing line 1 that manufactures a hydraulic excavator 100 by combining a plurality of work-in-progress products, and is equipped with a first detection unit 3a that monitors the manufacturing status of a first work-in-progress manufacturing line 11 that manufactures a lower traveling body 101, which is one of the plurality of work-in-progress products, a second detection unit 3b that monitors the manufacturing status of a second work-in-progress manufacturing line 12 that manufactures an upper rotating body 102, a liquid crystal monitor 7a of a display unit 7 that displays information to a manager, and a control unit 5 that calculates information to be displayed on the liquid crystal monitor 7a. The control unit 5 also includes a delay determination unit 53 that determines delays in the first work-in-progress manufacturing line 11 and the second work-in-progress manufacturing line 12. , and an output unit 47 that generates information to be output to the liquid crystal monitor 7a, and the delay determination unit 53 determines whether or not a delay has occurred in the manufacturing process of the first work-in-progress production line 11 and the second work-in-progress production line 12 based on the manufacturing status of the first work-in-progress production line 11 and the second work-in-progress production line 12 monitored by the first detection unit 3a and the second detection unit 3b, and the output unit 47 displays the manufacturing status of the first work-in-progress production line 11 and the second work-in-progress production line 12 on the same graph on the liquid crystal monitor 7a, and outputs data indicating information indicating that a delay has occurred in the manufacturing process of the first work-in-progress production line 11 and the second work-in-progress production line 12 as determined by the delay determination unit 53.

Therefore, based on the production status of the first work-in-progress production line 11 and the second work-in-progress production line 12 monitored by the first detection unit 3a and the second detection unit 3b, the delay determination unit 53 determines the delay in the production process of the first work-in-progress production line 11 and the second work-in-progress production line 12, and the production status of the first work-in-progress production line 11 and the second work-in-progress production line 12 are displayed on the same graph from the output unit 47 to the liquid crystal monitor 7a, and data displaying information on the delay in the production process of the first work-in-progress production line 11 and the second work-in-progress production line 12 determined by the delay determination unit 53 is output. Therefore, for example, a manager in charge of the production site while looking at the liquid crystal monitor 7a can give accurate instructions to workers at the production site based on the information on the delay in the production process of the first work-in-progress production line 11 and the second work-in-progress production line 12 output to the liquid crystal monitor 7a.

The control unit 5 has a plan input section 43 to which the production plans of the first work-in-process production line 11 and the second work-in-process production line 12 are input, and the delay determination section 53 determines a delay in the production process of the first work-in-process production line 11 and the second work-in-process production line 12 by comparing the production plan input to the plan input section 43 with the production results (production status) of the first work-in-process production line 11 and the second work-in-process production line 12, and the output section 47 displays the production plan related to the production plan input to the plan input section 43 on the LCD monitor 7a in a graph and outputs data displaying information indicating that a delay has occurred to make the user aware of the delay, so that the difference between the production plan and the production results (production status) can be made clear while displaying the delay in the production process of the first work-in-process production line 11 and the second work-in-process production line 12.

The output unit 47 outputs data that causes the graph showing the production status of the work-in-progress production line that has been determined to be delayed by the delay determination unit 53 to flash, so that the manager can clearly recognize the finished product production line 1 that is delayed.

The lower traveling body 101 and the upper rotating body 102 are provided with RFID tags 33 that store information identifying the lower traveling body 101 and the upper rotating body 102, and the first detection unit 3a and the second detection unit 3b are RFID readers 31 arranged in multiple locations on the first work-in-progress production line 11 and the second work-in-progress production line 12, and are configured to extract information stored in the RFID tags 33 that pass through the RFID readers 31. This makes it possible to reliably detect which process the lower traveling body 101 and the upper rotating body 102 are in and monitor the production status.

The first detection unit 3a and the second detection unit 3b each have a video camera 35 arranged to capture an image of at least one process in the first work-in-progress production line 11 and the second work-in-progress production line 12, and the delay determination unit 53 determines the delay in the process captured by the video camera 35 based on the image captured by the video camera 35, so that the delay within each process can be appropriately determined.

At least one of the lower running body 101 and the upper rotating body 102 is provided with a transmitter 39 that transmits position information of at least one of the lower running body 101 and the upper rotating body 102, and at least one of the first detection unit 3a and the second detection unit 3b is a receiver 37 that receives the position information of at least one of the lower running body 101 and the upper rotating body 102 transmitted from the transmitter 39. The delay determination unit 53 determines the delay based on the position information of at least one of the lower running body 101 and the upper rotating body 102 received by the receiver 37. Therefore, even if the workpiece is moved to a different site when moving to the next process, for example, a delay caused by traffic congestion or the like during the movement can be detected and the manufacturing status can be monitored.

The LCD monitor 7a is included in the portable display unit 7, so the manager can carry the display unit 7 with him and perform other tasks while monitoring the manufacturing site.

Although the description of the title of the invention according to the present invention is completed above, the present invention is not limited to the above-described embodiment, and can be modified within the scope of the gist of the invention.
For example, in this embodiment, in step S101 during delay judgment control, the products manufactured during the time period specified by the manager via the input section 7b of the display unit 7 are selected as the products for which delay judgment is to be made, but it is also possible to select the products for which delay judgment is to be made that are delayed more than a specified value compared with the manufacturing plan inputted to the plan input section 43 and the products before and after that.

In addition, in this embodiment, in step S101 of the delay judgment control, the products manufactured during the time period specified by the manager via the input section 7b of the display unit 7 are selected as products for which a delay judgment is to be made, but all products located on the finished product production line 1 may be automatically selected as products for which a delay judgment is to be made without the manager's operation.

In addition, in this embodiment, the process in the graph where a delay is occurring is surrounded by a blinking circle C, an image of the process where a delay is occurring is displayed in a small window W, and the graph of the actual values is made blinking to make the manager aware of the delay, but the manager may also be made aware by sound or vibration, or these may be used in combination with the display.

1. Finished product production line (production line)
3a First detection unit (first monitoring unit)
3b Second detection unit (second monitoring unit)
5. Control unit (control device)
7 Display unit (tablet device)
7a Liquid crystal monitor (monitor)
11 First work-in-progress production line 12 Second work-in-progress production line 31 RFID reader (information reading device)
33 RFID tag (information storage device)
35 Video camera (imaging device)
37 Receiver 39 Transmitter 47 Output section 53 Delay determination section 100 Hydraulic excavator (finished product)
101 Lower running body (first work in progress)
102 Upper rotating body (second work in progress)

Claims (7)

A manufacturing management system for a construction machine, which manufactures a first component of a construction machine as a first work-in-progress in a first work-in-progress manufacturing line, manufactures a second component of the construction machine as a second work-in-progress in a second work-in-progress manufacturing line, and manufactures the construction machine as a finished product by combining the first work-in-progress and the second work-in-progress in a completion line,
a first monitoring unit for monitoring a production status of the first work-in-progress product in the first work-in-progress production line;
a second monitoring unit for monitoring a production status of the second work-in-progress in the second work-in-progress production line;
a monitor that displays predetermined information to an administrator;
a control device for controlling the predetermined information to be displayed on the monitor;
The control device includes:
a delay determination unit that determines whether or not a delay has occurred in the manufacturing process of the first work-in-progress production line based on the manufacturing status of the first work-in-progress monitored by the first monitoring unit, and that determines whether or not a delay has occurred in the manufacturing process of the second work-in-progress production line based on the manufacturing status of the second work-in-progress monitored by the second monitoring unit;
The monitor is configured to display the production status of the first work-in-progress , the second work- in-progress , and the finished product in the first work-in-progress production line, the second work-in-progress production line, and the finished product on the basis of a horizontal axis representing time and a vertical axis representing one production process of the first work-in-progress production line, the second work-in-progress production line, and the finished product, the start to completion of the production of one of the first work-in-progress products in the first work-in-progress production line being connected by one line, the start to completion of the production of one of the second work-in-progress products in the second work-in-progress production line being connected by one line, and the completion of the production of one of the first work-in-progress products in the first work-in-progress production line and the completion of the production of one of the second work-in-progress products in the second work-in-progress production line being connected by one line. a graph in which a line connects each of the start of the combination of the one first work-in-process and the one second work-in-process on the completed line with a line, and a line connects from the start of the combination of the one first work-in-process and the one second work-in-process on the completed line to the completion of production of the one construction machine as the finished product with a line ; and information indicating that a delay is occurring in the production process of a work-in-process production line for which a delay is determined to be occurring in the production process by the delay determination unit among the first work-in-process production line and the second work-in-process production line. the control device has a plan input unit to which production plans of the first work-in-progress production line and the second work-in-progress production line are input,
the delay determination unit determines whether or not a delay has occurred in a manufacturing process of the first work-in-progress production line and the second work-in-progress production line by comparing the production plan input to the plan input unit with a production status of the first work-in-progress product and the second work-in-progress product;
the output unit displays information indicating the manufacturing plan input to the plan input unit on the graph, and outputs data indicating the occurrence of the delay to the monitor.
2. A manufacturing management system for a construction machine according to claim 1. the output unit outputs to the monitor data for flashing a graph showing a production status of a work-in-progress production line determined to be delayed by the delay determination unit, among the graphs.
3. The construction machine production management system according to claim 2. The first work-in-progress and the second work-in-progress are provided with an information storage device that stores information identifying the first work-in-progress and the second work-in-progress,
the first monitoring unit and the second monitoring unit are provided in plurality on the first work-in-progress production line and the second work-in-progress production line, and are information reading devices that extract information stored in an information storage device that passes through the first monitoring unit and the second monitoring unit among the information storage devices;
2. A manufacturing management system for a construction machine according to claim 1. The first monitoring unit and the second monitoring unit each have an imaging device arranged to image at least one process in the first work-in-progress production line and the second work-in-progress production line,
The delay determination unit determines a delay in a process of imaging by the imaging device based on an image captured by the imaging device.
2. A manufacturing management system for a construction machine according to claim 1. At least one of the first work-in-progress and the second work-in-progress is provided with a transmitter that transmits position information of at least one of the first work-in-progress and the second work-in-progress,
At least one of the first monitoring unit and the second monitoring unit is a receiver that receives position information of at least one of the first work-in-progress and the second work-in-progress transmitted from the transmitter,
the delay determination unit determines the delay based on position information of at least one of the first work-in-progress and the second work-in-progress received by the receiver.
2. A manufacturing management system for a construction machine according to claim 1. The monitor is included in a portable tablet terminal.
2. A manufacturing management system for a construction machine according to claim 1.