Manufacturing Management System for Construction Machinery

Abstract

To provide a manufacturing management system for construction machinery capable of recognizing delays in manufacturing processes at a manufacturing site.SOLUTION: A manufacturing management system includes a first monitoring unit that monitors the manufacturing status of a first work-in-progress on a first work-in-progress production line, a second monitoring unit that monitors the manufacturing status of a second work-in-progress on a second work-in-progress production line, a monitor, and a control device. The control device includes a delay determination unit that determines delays in the manufacturing processes of the first work-in-progress production line and the second work-in-progress production line, and an output unit. The delay determination unit determines the delays of the manufacturing processes in the first work-in-progress production line and the second work-in-progress production line (S103, 106) based on the manufacturing status of the first work-in-progress and the second work-in-progress monitored by the first monitoring unit and the second monitoring unit, respectively. The output unit outputs data to the monitor for displaying: the manufacturing status of the first work-in-progress and the second work-in-progress on the same graph (S105, 107, 108), and information about the delays in the manufacturing processes of the first work-in-progress production line and the second work-in-progress production line determined by the delay determination unit.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a manufacturing management system for construction machinery, and particularly to a technique for smoothing the manufacturing line.

Background Art

[0002] Generally, a hydraulic excavator is manufactured separately into a lower traveling body and an upper revolving body. That is, in the manufacturing process of a hydraulic excavator, after the lower traveling body and the upper revolving body have been each subjected to a predetermined manufacturing process, the upper revolving body is mounted on the lower traveling body. Here, for example, considering the manufacturing process of the upper revolving body, there are a plurality of processes such as a machining process, a cutting process, and an assembly process (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in a manufacturing process having a plurality of processes such as the technique disclosed in Patent Document 1 above, the manufacturing process may be delayed due to shortage of parts or the like. When the manufacturing process is thus delayed, the timing of combining the lower traveling body (first work in process) and the upper revolving body (second work in process) may shift, and the manufacturing may not proceed as scheduled.

[0005] Therefore, in such a case, since there is a risk that the manufacturing of products (subsequent products) manufactured on the same manufacturing line after the products with a delayed manufacturing process (delayed products) may also be delayed, it is conceivable to remove the delayed products from the manufacturing line and manufacture the subsequent products first. However, there is a possibility that a manager who gives an instruction to remove such delayed products from the manufacturing line may not notice that the manufacturing is delayed in the manufacturing process, and there is room for further improvement in the management of the manufacturing line.

[0006] The present invention has been made in view of such problems, and an object thereof is to provide a manufacturing management system for construction machines that can recognize delays in manufacturing processes at a manufacturing site.

Means for Solving the Problems

[0007] To achieve the above object, a manufacturing management system for a construction machine according to the present invention manufactures a first component of the construction machine as a first work-in-progress on a first work-in-progress manufacturing line, manufactures a second component of the construction machine as a second work-in-progress on a second work-in-progress manufacturing line, and combines the first work-in-progress and the second work-in-progress on a completion line As a finished product A manufacturing management system for a construction machine that manufactures the construction machine, comprising: a first monitoring unit that monitors the manufacturing status of the first work-in-progress on the first work-in-progress manufacturing line; a second monitoring unit that monitors the manufacturing status of the second work-in-progress on the second work-in-progress manufacturing line; a monitor that displays predetermined information to a manager; and a control device that controls the predetermined information displayed on the monitor. The control device determines whether 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 determines whether 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. A delay determination unit, and for the monitor, the first work-in-progress manufacturing line 、 The second work-in-progress manufacturing line and the said completion line The manufacturing status of the first work-in-progress 、 The second work-in-progress and the said finished product is represented with time on the horizontal axis and the manufacturing processes of the first work-in-progress manufacturing line, the second work-in-progress manufacturing line, and the completion line on the vertical axis, One and From the start to the completion of the production of one of the said first work-in-progress products on the said first work-in-progress product production line is connected by one line, from the start to the completion of the production of one of the said second work-in-progress products on the said second work-in-progress product production line is connected by one line, the completion of the production of one of the said first work-in-progress products on the said first work-in-progress product production line and the completion of the production of one of the said second work-in-progress products on the said second work-in-progress product production line and the start of the combination of one of the said first work-in-progress products and one of the said second work-in-progress products on the said completion line are each connected by one line, and from the start of the said one The said First work-in-progress and The said one The said Second work-in-progress start of the combination to the completion of one construction machine as the said finished product manufacturing completion is one is represented by a line connectedAn output unit that outputs data for causing a graph and information indicating that a delay has occurred in the manufacturing process of a work-in-progress product manufacturing line determined by the delay determination unit among the first work-in-progress product manufacturing line and the second work-in-progress product manufacturing line to be displayed. It is characterized by having this.

[0008] Based on this, based on the manufacturing status of the first work-in-progress products on the first work-in-progress product manufacturing line and the second work-in-progress products on the second work-in-progress product manufacturing line monitored by the first monitoring unit and the second monitoring unit, the delay determination unit determines the delay in the manufacturing process of at least one of the first work-in-progress product manufacturing line and the second work-in-progress product manufacturing line, and from the output unit to the monitor 、 The first work-in-progress product manufacturing line by One of the first work-in-progress products and the second work-in-progress product manufacturing line by Manufacturing of one of the second work-in-progress products From the start to the completion, from the completion of the production of one of the said first work-in-progress products and one of the said second work-in-progress products to the start of the combination of one of the said first work-in-progress products and one of the said second work-in-progress products on the completion line, and from the start of the combination of one of the said first work-in-progress products and one of the said second work-in-progress products on the completion line to the completion of one construction machine as the finished product, Manufacturing completion is each one By the production line connecting Display on the graph while By outputting data for displaying information on the delay in the manufacturing process of at least one of the first work-in-progress product manufacturing line and the second work-in-progress product manufacturing line determined by the delay determination unit, displaying on a graph without complicating the manufacturing progress from the start of the production of each one work-in-progress product on each work-in-progress product production line to the combination of each one work-in-progress product on the completion line and then to the completion of one construction machine as the finished product on the subsequent completion line, It becomes possible to recognize the delay in the manufacturing process at the manufacturing site. For example, a manager who gives instructions at the manufacturing site while looking at the monitor can give accurate instructions to the workers at the manufacturing site based on the information on the delay in the manufacturing process of at least one of the first work-in-progress product manufacturing line and the second work-in-progress product manufacturing line output to the monitor.

[0009] As another aspect, the control device has a plan input unit to which the manufacturing plans of the first work-in-progress product manufacturing line and the second work-in-progress product manufacturing line are input. The delay determination unit collates the manufacturing plan input to the plan input unit with the manufacturing status of the first work-in-progress products and the second work-in-progress products to determine whether a delay has occurred in the manufacturing process of the first work-in-progress product manufacturing line and the second work-in-progress product manufacturing line. The output unit preferably displays information indicating the manufacturing plan input to the plan input unit on the graph and outputs data for displaying information indicating that the delay has occurred to the monitor.

[0010] Thereby, by collating the manufacturing plan input to the plan input unit with the manufacturing status of the semi-finished products on the first semi-finished product manufacturing line and the second semi-finished products on the second semi-finished product manufacturing line, it is determined whether there is a delay in the manufacturing process of at least one of the first semi-finished product manufacturing line and the second semi-finished product manufacturing line. By graphically displaying the manufacturing plan related to the manufacturing plan input to the plan input unit on the graph and displaying the delay information, it is possible to clarify the difference between the manufacturing plan and the manufacturing status while displaying information about the delay in the manufacturing process of at least one of the first semi-finished product manufacturing line and the second semi-finished product manufacturing line.

[0011] As another aspect, it is preferable that the output unit outputs to the monitor data for causing the monitor to display, by flashing, a graph showing the manufacturing status of the semi-finished product manufacturing line determined to be delayed by the delay determination unit among the graphs.

[0012] Thereby, the output unit can clearly recognize the delayed manufacturing line by flashing and displaying a graph showing the manufacturing status of the semi-finished product manufacturing line determined to be delayed by the delay determination unit among the graphs.

[0013] As another aspect, the first semi-finished product and the second semi-finished product are provided with an information storage device for storing information for identifying the first semi-finished product and the second semi-finished product. The first monitoring unit and the second monitoring unit are arranged in a plurality on the first semi-finished product manufacturing line and the second semi-finished product manufacturing line. It is preferable that the information reading device extracts information stored in the information storage device that passes through the first monitoring unit and the second monitoring unit among the information storage devices.

[0014] Thereby, by extracting the information stored in the information storage device that passes through the information reading device among the plurality of information storage devices arranged on the first semi-finished product manufacturing line and the second semi-finished product manufacturing line, it is possible to surely monitor the process in which the first semi-finished product and the second semi-finished product are located.

[0015] As another aspect, the first monitoring unit and the second monitoring unit preferably include an imaging device arranged to image at least one process among the first workpiece manufacturing line and the second workpiece manufacturing line, and the delay determination unit preferably determines a delay in the process imaged by the imaging device based on the video imaged by the imaging device.

[0016] Accordingly, by determining, by the delay determination unit, the delay in the process imaged by the imaging device based on the video imaged by the imaging device, it is possible to suitably determine the delay within each process.

[0017] As another aspect, at least one of the first workpiece and the second workpiece is provided with a transmitter that transmits position information of at least one of the first workpiece and the second workpiece, and 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 workpiece and the second workpiece transmitted from the transmitter, and the delay determination unit preferably determines the delay based on the position information of at least one of the first workpiece and the second workpiece received by the receiver.

[0018] Accordingly, by receiving, by the receiver, the position information of at least one of the first workpiece and the second workpiece transmitted from the transmitter and determining the delay based on the position information of at least one of the first workpiece and the second workpiece, it is possible to monitor a delay caused by congestion or the like that occurs during the movement, even when moving to a different site when shifting to the next process, for example.

[0019] As another aspect, the monitor preferably is included in a portable tablet terminal.

[0020] By outputting information on the delay in the manufacturing process of at least one of the first work-in-progress manufacturing line and the second work-in-progress manufacturing line to the monitor included in the portable tablet terminal, the administrator can carry the tablet terminal and monitor the manufacturing site while performing other tasks.

Advantages of the Invention

[0021] According to the manufacturing management system of the construction machine of the present invention, based on the manufacturing status of the first work-in-progress of the first work-in-progress manufacturing line and the second work-in-progress of the second work-in-progress manufacturing line monitored by the first monitoring unit and the second monitoring unit, the delay in the manufacturing process of at least one of the first work-in-progress manufacturing line and the second work-in-progress manufacturing line is determined by the delay determination unit, and from the output unit to the monitor 、 One first work-in-progress of the first work-in-progress manufacturing line by and one second work-in-progress of the second work-in-progress manufacturing line by of the manufacturing From the start to the completion, from the completion of the production of one of the said first work-in-progress products and one of the said second work-in-progress products to the start of the combination of one of the said first work-in-progress products and one of the said second work-in-progress products on the completion line, and from the start of the combination of one of the said first work-in-progress products and one of the said second work-in-progress products on the completion line to the completion of one construction machine as the finished product, manufacturing completion is each one line by connecting displayed on the graph, and data for displaying information on the delay in the manufacturing process of at least one of the first work-in-progress manufacturing line and the second work-in-progress manufacturing line determined by the delay determination unit is output. Therefore, displaying on a graph without complicating the manufacturing progress from the start of the production of each one work-in-progress product on each work-in-progress product production line to the combination of each one work-in-progress product on the completion line and then to the completion of one construction machine as the finished product on the subsequent completion line, it is possible to recognize the delay in the manufacturing process at the manufacturing site. For example, an administrator who gives instructions at the manufacturing site while looking at the monitor can give accurate instructions to the workers at the manufacturing site based on the information on the delay in the manufacturing process of at least one of the first work-in-progress manufacturing line and the second work-in-progress manufacturing line output to the monitor.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0023] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Referring to FIG. 1, a schematic diagram of a finished product manufacturing line 1 of a hydraulic excavator 100 having a lower traveling body 101 and an upper revolving body 102 is shown. The hydraulic excavator 100 is a finished product completed by combining work-in-progress products manufactured by a plurality of work-in-progress product manufacturing lines. Specifically, the finished product manufacturing line (manufacturing line) 1 for manufacturing the hydraulic excavator 100 includes a first work-in-progress product manufacturing line 11, a second work-in-progress product manufacturing line 12, and a completion line 13. Further, detection units 3 (3a, 3b) are arranged on the finished product manufacturing line 1, and a control unit (control device) 5 and a display unit 7 are arranged at positions away from the finished product manufacturing line 1 and the detection units 3.

[0024] The first work-in-progress manufacturing line 11 has a first process 21 and a second process 22, and is a manufacturing line capable of manufacturing the lower traveling body (first component) 101 by performing the processes in the order of the first process 21 and the second process 22. The second work-in-progress manufacturing line 12 has a third process 23 and a fourth process 24, and is a manufacturing line capable of manufacturing the upper swing body (second component) 102 by performing the processes in the order of the third process 23 and the fourth process 24. The completion line 13 has an assembly process 25, and is a manufacturing line capable of assembling the lower traveling body (first work-in-progress) 101 manufactured on the first work-in-progress manufacturing line 11 and the upper swing body (second work-in-progress) 102 manufactured on the second work-in-progress manufacturing line 12 in the assembly process 25, and then completing the hydraulic excavator (finished product) 100.

[0025] In addition, an additional process 26 is provided on the finished product manufacturing line 1. The additional process 26 is a temporarily used process capable of temporarily evacuating the lower traveling body 101, the upper swing body 102, and the hydraulic excavator 100 on the first work-in-progress manufacturing line 11, the second work-in-progress manufacturing line 12, and the completion line 13, and performing repairs as necessary.

[0026] The detection unit 3 is a general term for sensors and the like that detect the progress of each process in the finished product manufacturing line 1 and monitor the manufacturing 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 the sake of convenience of explanation, among the detection units 3, the sensors and the like used for the first work-in-progress manufacturing line 11 are referred to as the first detection unit (first monitoring unit) 3a, and the sensors and the like used for the second work-in-progress manufacturing line 12 are referred to as the second detection unit (second monitoring unit) 3b.

[0027] The RFID reader 31 is a reading device capable of reading (extracting) the information stored in the RFID (Radio Frequency Identifier) tag 33. This RFID reader 31 is disposed at the positions where each process such as the first process 21 to the fourth process 24, the bonding process 25, and the additional process 26 is performed. On the other hand, the RFID tag (information storage device) 33 is attached to, for example, the frame of the lower traveling body 101 or the upper slewing body 102, and identification information such as the product number of the lower traveling body 101 is stored therein. Therefore, by reading the RFID tag 33 in each process, the RFID reader 31 can detect information such as which product with which product number enters and exits which process and when, and monitor the manufacturing status.

[0028] The video camera 35 is an imaging device disposed at the positions where each process is performed, and can image the situation in which each process is being carried out. The receiver 37 is a communication device capable of receiving the information transmitted from the transmitter 39. This receiver 37 is disposed in the vicinity of the control unit 5. On the other hand, the transmitter 39 is a communication device capable of specifying its own current location by means of GPS (Global Positioning System) or the like, and is disposed, for example, on the pallet 104 loaded with the lower traveling body 101 after the second process 22. Therefore, when the lower traveling body 101 after the second process 22 is moving toward the place where the completion line 13 is implemented, the receiver 37 can specifically specify the current location of the lower traveling body 101 via the pallet 104 on which the transmitter 39 is disposed and monitor the manufacturing status.

[0029] The display unit 7 is a tablet terminal having a liquid crystal monitor (monitor) 7a and can communicate with the control unit 5. This display unit 7 can display the image data (predetermined information) transmitted from the control unit 5 on the liquid crystal monitor 7a. Further, the display unit 7 can input information by directly touching the liquid crystal monitor 7a. For the sake of convenience of explanation, for example, a virtual keyboard or a touch operation detection unit for inputting information in the liquid crystal monitor 7a is referred to as an input unit 7b (see FIG. 2).

[0030] Referring to FIG. 2, the connection configuration of the control unit 5 related to the control of the management system according to the present invention is shown in a block diagram. The control unit 5 is a high-speed arithmetic processing unit that performs overall control of the management system according to the present invention. This control unit 5 has an arithmetic unit 41, a plan input unit 43, a storage unit 45, and an output unit 47.

[0031] The arithmetic unit 41 is an arithmetic unit that performs determinations and the like based on the input information. Specifically, the arithmetic unit 41 has a data combining unit 51, a delay determination unit 53, and a plan verification unit 55. The data combining unit 51 can execute data combining process control for summarizing overlapping information after the combining step 25. The delay determination unit 53 can determine a delay in the manufacturing process in the finished product manufacturing line 1. The plan verification unit 55 can verify the manufacturing results (manufacturing status) and the manufacturing plan in the finished product manufacturing line 1.

[0032] The plan input unit 43 is an input unit to which information regarding the manufacturing plan for the entire finished product manufacturing line 1, input by the administrator operating the input unit 7b of the display unit 7, is input. The storage unit 45 is a memory that stores various arithmetic results by the arithmetic unit 41 and the 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 arithmetic results by the arithmetic unit 41.

[0033] Here, on the input side of the control unit 5, an RFID reader 31, a video camera 35, a receiver 37, and a display unit 7 are connected in an information - communicable manner, for example. As a result, the control unit 5 receives, from the RFID reader 31, identification information such as product numbers stored in the RFID tag 33 and information regarding the time when the RFID tag 33 was read. From the video camera 35, information regarding the status of each process performed in the first process 21 and the third process 23 is input. From the receiver 37, the time - dependent position information of the pallet 104 loaded with the lower traveling body 101 after the second process 22 is input. From the display unit 7, information regarding the overall production plan of the entire finished - product production line 1 input via the input unit 7b is input. On the other hand, on the output side of the control unit 5, the display unit 7 is communicably connected, and the information calculated by the output unit 47 of the control unit 5 is displayed on the liquid - crystal monitor 7a.

[0034] Referring to FIG. 3, a routine showing the control procedure of the data - combining process control executed by the data - combining unit 51 of the arithmetic unit 41 is shown in a flowchart. Hereinafter, the control procedure of the data - combining process control will be described according to the flowchart.

[0035] In step S1, data (combined data) having combined - flag 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, the combined - flag data refers to, for example, a plurality of pieces of information associated with the RFID tag 33 when a plurality of RFID tags 33 are read simultaneously by the RFID reader 31.

[0036] In step S2, it is determined whether or not the combined data was extracted in step S1. If the determination result in step S2 is false (No), and it is determined that the 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), and it is determined that the combined data has been extracted, the process proceeds to step S3. Thus, steps S1 and S2 are repeated until the combined data is extracted (No in step S2), and when the combined data is extracted (Yes in step S2), the process can proceed to step S3.

[0037] In step S3, the component name of each piece of data within the combined data extracted in step S1 is extracted, and the process proceeds to step S4. Here, the component name indicates the product name that constitutes the hydraulic excavator 100, such as the lower traveling body (first component) 101 and the upper revolving body (second component) 102. Next, in step S4, among the plurality of component names extracted in step S3, data other than the data related to a preset representative component name, for example, data after the combining step 25 is deleted, and the process proceeds to step S5. Then, in step S5, the labels (labels 61 and 62 of the graph in FIG. 4 described later) of the data of the representative component after the combining step 25 are changed to the name (label 63) indicating the combined product, and the process proceeds to step S6.

[0038] Therefore, in steps S3 and S4, the data after the combining step 25 can be narrowed down to the data related to a preset representative component name, preventing data duplication. Also, in step S5, the labels 61 and 62 in the graph can be unified to the label 63 of the name indicating the combined product, which is the data of the representative component after the combining step 25.

[0039] In step S6, the information calculated in steps S1 to S5 is stored in the storage unit 45 as production result data, and this routine ends. Then, this routine is repeated again. Thus, the administrator can consider improvements to the finished product production line 1 based on the information of the production result data stored in the storage unit 45.

[0040] FIG. 4 is a graph showing the manufacturing progress of the hydraulic excavator 100 alone, with time on the horizontal axis and each manufacturing line on the vertical axis. According to this graph, the lower traveling body 101 started the first process 21 at 8:00 and completed it at 8:20, started the second process 22 at 9:10 and completed it at 10:00, and started the coupling process 25 at 10:50. On the other hand, the upper swing body 102 started the third process 23 at 7:00 and completed it at 7:50, started the fourth process 24 at 8:40 and completed it at 9:30, and started the coupling process 25 at 10:50. And in the processes after the coupling process 25 on the completion line 13, the manufacturing of the hydraulic excavator 100 formed by coupling the lower traveling body 101 and the upper swing body 102 is carried out.

[0041] Therefore, by executing data coupling process control by the data coupling unit 51, the overlapping information after the coupling process 25 can be bundled into one piece of information. Thus, the data coupling process control can reduce the amount of data managed by the control unit 5 and can specify the display name to be displayed in the graph after the coupling process 25. And in step S6, by storing the information calculated by these data coupling process controls in the storage unit 45, the manufacturing results of the hydraulic excavator 100 related to the description of the above data coupling process control are stored as manufacturing result data, and the manufacturing result data can be stored cumulatively thereafter.

[0042] Referring to FIG. 5, a flowchart showing the control procedure of the delay determination control executed by the delay determination unit 53 of the calculation unit 41 is shown. Hereinafter, the control procedure of the delay determination control will be described along with this flowchart.

[0043] In step S101, a product for which delay determination is to be made is selected, and the process proceeds to step S102. Specifically, in step S101, a product manufactured during the time period specified by the administrator via the input unit 7b of the display unit 7 is selected as the product for which delay determination is to be made. In step S102, the manufacturing data of the product selected in step S101 is converted into a graph and output, and the process proceeds to step S103. Therefore, in steps S101 and S102, the manufacturing data in the time period specified by the administrator can be displayed on the liquid crystal monitor 7a of the display unit 7 in the form of a graph (see FIG. 4 and FIGS. 6 and 7 described later).

[0044] In step S103, it is determined whether there is any data among the manufacturing data of the product selected in step S101 for which the implementation time of the process is equal to or greater than a certain value. Here, the certain value is, for example, the value obtained by dividing the distance in the target process of a belt conveyor that extends on the first work-in-process manufacturing line 11 or the second work-in-process manufacturing line 12 and on which the lower traveling body 101 and the upper revolving body 102 are mounted and that is driven 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 for which the time interval between processes is equal to or greater than the certain value, the process proceeds to step S106. If the determination result in step S103 is true (Yes), and it is determined that there is data for which the time interval between processes is equal to or greater than the certain value, the process proceeds to step S104.

[0045] In step S104, it is indicated that there is a process in which the time interval between processes is equal to or greater than the certain value, that is, a process in which manufacturing is delayed. For example, the corresponding process on the graph is surrounded by a blinking circle C (see FIG. 7 described later), and the process proceeds to step S105. In step S105, the video captured by the video camera 35 in the delayed process is output as a small window W (see FIG. 7 described later) to the output unit 47, and the process proceeds to step S106.

[0046] Therefore, in steps S103 to S105, a process with a delay such that the implementation time of the process is equal to or greater than a certain value is detected to monitor the manufacturing status (step S103), the corresponding process is surrounded by a blinking circle C (step S104), and the video (S108) related to the process captured by the video camera 35 is displayed on the liquid crystal monitor 7a of the display unit 7 via the output unit 47. Thereby, it is possible to make the administrator recognize that a delay has occurred in the process and to convey the current status of the process to the administrator in the form of a video.

[0047] After step S105, in steps S106 to S108, this control is executed with the intervention of the plan verification control by the plan verification unit 55. In step S106, based on the information regarding the manufacturing plan of the entire finished product manufacturing line 1 input to the plan input unit 43, it is determined whether there is manufacturing data having a process in which the time difference between the manufacturing plan and the manufacturing result is equal to or greater than a specified value. Here, the specified value may be, for example, about 20 minutes.

[0048] If the determination result 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 result is equal to or greater than the specified value, the delay determination control is terminated. On the other hand, if the determination result 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 result is equal to or greater than the specified value, the process proceeds to step S107.

[0049] In step S107, the manufacturing plan for the process in which the time difference between the manufacturing plan and the manufacturing result is equal to or greater than the specified value is output via the output unit 47 in the form of a graph, and the process proceeds to step S108. In step S108, the graph of the actual value for the product having a process in which the time difference between the manufacturing plan and the manufacturing result is equal to or greater than the specified value is blinked to terminate the delay determination control.

[0050] Therefore, in steps S106 to S108, a manufacturing situation in which the manufacturing is significantly behind the plan such that the time difference between the manufacturing plan and the manufacturing result is equal to or greater than the specified value is monitored (step S106), and the graph related to the manufacturing plan (S107) and the graph of the blinking actual value (S108) can be displayed on the liquid crystal monitor 7a of the display unit 7.

[0051] Referring to FIG. 6, there is shown a graph displayed on the liquid crystal monitor 7a of the display unit 7 when the hydraulic excavator 100 is manufactured as per the manufacturing plan. Also, referring to FIG. 7, there is shown a graph displayed on the liquid crystal monitor 7a of the display unit 7 when a delay occurs in the second step 22 of the first workpiece manufacturing line 11 in the lower traveling body A.

[0052] Hereinafter, the operation and effect of the delay determination control will be described with reference to FIGS. 5 to 7. For the sake of convenience of explanation, the hydraulic excavator 100 whose manufacturing was started earlier is referred to as hydraulic excavator A, and the hydraulic excavator 100 whose manufacturing was started after hydraulic excavator A is referred to as hydraulic excavator B. Also, similarly for the lower traveling body 101 and the upper swing body 102, those whose manufacturing was started earlier are referred to as lower traveling body A and upper swing body A, and those whose manufacturing was started after lower traveling body A and upper swing body A are referred to as lower traveling body B and upper swing body B. Furthermore, the white circles on the graphs of FIGS. 6 and 7 indicate the start of the process, and the black circles indicate the end of the process.

[0053] First, with reference to FIGS. 5 and 6, the case (Case 1) where both hydraulic excavators A and B are manufactured as per the manufacturing plan will be described. By the administrator designating the hydraulic excavators manufactured in the time zone from 7:00 to 17:00 via the input unit 7b of the display unit 7 (step S101), the manufacturing data of hydraulic excavators A and B are displayed on the liquid crystal monitor 7a of the display unit 7 in the graph of FIG. 6 (step S102).

[0054] Here, since both hydraulic excavators A and B are manufactured as per the manufacturing plan, there is no data with a time interval between processes being equal to or greater than a certain value (No in step S103), and there is no process with a time difference between the manufacturing plan and the manufacturing result being equal to or greater than a specified value (No in step S106). Therefore, 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.

[0055] According to the graph of FIG. 6 as described above, by executing data merging process control by the data merging unit 51, the graphs after the merging step 25 can be combined into one for each of the hydraulic excavators A and B, so that the complexity of the graph can be suppressed. Further, by displaying the labels 61, 62, and 63 on the graph, it is possible to easily recognize which product each line on the graph represents.

[0056] Next, with reference to FIGS. 5 and 7, differences from Case 1 will be described for the case (Case 2) where a delay occurs in the manufacturing of the lower traveling body A of the hydraulic excavator A in the second step 22 of the first work-in-progress manufacturing line 11.

[0057] In Case 2, at the first determination in FIG. 7, since a delay has occurred in the manufacturing of the lower traveling body A in the second step 22 of the first work-in-progress manufacturing line 11, the time from when the lower traveling body A is input to the second step 22 until it is carried out, that is, the execution time of the second step 22, is equal to or greater than a certain value (Yes in step S103). Therefore, in Case 2, in order to make the administrator recognize the delay in the second step 22, a video in which the second step 22 is surrounded by a blinking circle C (step S104) and the small window W is located in the upper right part of the graph (step S105) is displayed on the liquid crystal monitor 7a of the display unit 7.

[0058] Thereby, the administrator can suitably recognize, by the blinking circle C, that a delay has occurred in the manufacturing of the lower traveling body A due to some reason in the second step 22 among the graphs displayed on the liquid crystal monitor 7a of the display unit 7. Further, the administrator can determine the cause of the delay occurring in the second step 22 based on the video captured by the video camera 35 in the second step 22 because the video captured by the video camera 35 in the second step 22 is displayed in the small window W.

[0059] The administrator who has recognized the delay in the manufacturing of the lower traveling body A in the second step 22 in this way instructs the operator to move the lower traveling body A in the second step 22 to the additional step 26, so that the lower traveling body B can be positioned in the second step 22 instead of the preceding lower traveling body A (see FIG. 7).

[0060] On the other hand, in the second determination in FIG. 7, when the lower traveling body B is positioned in the second process 22 instead of the lower traveling body A at the first determination, the lower traveling body B can carry out the second process 22 earlier than the production plan. Further, by carrying out the second process 22 of the lower traveling body B earlier than the production plan, there may be a difference of a specified value or more between the production result and the production plan in the second process 22 of the lower traveling body B (Yes in step S106). Therefore, in case 2, in order to show the production plan of the lower traveling body B to the administrator as an index, the production plan is displayed in a graph (step S107), and the graph of the actual value is blinked (step S105).

[0061] The administrator to whom the graph of the production plan of the lower traveling body B is shown as an index in this way can instruct the operator while referring to the graph of the production plan so as to accelerate the production of the lower traveling body B, the upper swing body B, and the hydraulic excavator B earlier than planned. Further, by displaying the production plan of the lower traveling body B whose production was started after the lower traveling body A, it is possible to easily consider how much it is necessary to accelerate the production of the lower traveling body B, the upper swing body B, and the hydraulic excavator B in order to reduce the delay occurring in the production plan of the lower traveling body 101 whose production is started after the lower traveling body B.

[0062] In particular, since data coupling process control is executed by the data coupling unit 51 and the overlapping information after the coupling process 25 is bundled into one piece of information, even when an irregular response is made to accelerate the production of the lower traveling body B, the upper swing body B, and the hydraulic excavator B earlier than planned, it is possible to suppress the graph after the coupling process 25 from becoming complicated.

[0063] Next, another embodiment of the present embodiment will be described. In the other embodiment, based on the video imaged by the video camera 35, the start and end of each process are detected and determined. As a result, for example, even when the product to be manufactured is a product to which it is difficult to attach the RFID tag 33, it is possible to generate combined flag data based on the video imaged by the video camera 35, output a graph, and ultimately determine the delay of each process based on the video imaged by the video camera 35.

[0064] As described above, in the manufacturing management system for construction machinery according to the present invention, it is a management system for the finished product manufacturing line 1 that manufactures the hydraulic excavator 100 by combining a plurality of work in progress items. It includes a first detection unit 3a that monitors the manufacturing status of the first work in progress manufacturing line 11 that manufactures the lower traveling body 101, which is one of the plurality of work in progress items, a second detection unit 3b that monitors the manufacturing status of the second work in progress manufacturing line 12 that manufactures the upper swing body 102, a liquid crystal monitor 7a of the display unit 7 for displaying to the administrator, and a control unit 5 that calculates the information to be displayed on the liquid crystal monitor 7a. The control unit 5 has a delay determination unit 53 that determines the delay of the first work in progress manufacturing line 11 and the second work in progress manufacturing line 12, and an output unit 47 that generates the information to be output to the liquid crystal monitor 7a. The delay determination unit 53 determines whether or not a delay has occurred in the manufacturing processes of the first work in progress manufacturing line 11 and the second work in progress manufacturing line 12 based on the manufacturing status of the first work in progress manufacturing line 11 and the second work in progress manufacturing line 12 monitored by the first detection unit 3a and the second detection unit 3b. The output unit 47 displays the manufacturing status of the first work in progress manufacturing line 11 and the second work in progress manufacturing line 12 on the same graph for the liquid crystal monitor 7a, and outputs data for displaying information indicating that a delay has occurred in the manufacturing processes of the first work in progress manufacturing line 11 and the second work in progress manufacturing line 12 determined by the delay determination unit 53.

[0065] Therefore, based on the manufacturing status of the first workpiece manufacturing line 11 and the second workpiece manufacturing 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 manufacturing processes of the first workpiece manufacturing line 11 and the second workpiece manufacturing line 12, and the output unit 47 displays the manufacturing status of the first workpiece manufacturing line 11 and the second workpiece manufacturing line 12 on the same graph on the liquid crystal monitor 7a, and outputs data for displaying information on the delay in the manufacturing processes of the first workpiece manufacturing line 11 and the second workpiece manufacturing line 12 determined by the delay determination unit 53. Thus, for example, a manager who gives instructions at the manufacturing site while looking at the liquid crystal monitor 7a can give accurate instructions to the workers at the manufacturing site based on the information on the delay in the manufacturing processes of the first workpiece manufacturing line 11 and the second workpiece manufacturing line 12 output to the liquid crystal monitor 7a.

[0066] And the control unit 5 has a plan input unit 43 to which the manufacturing plans of the first workpiece manufacturing line 11 and the second workpiece manufacturing line 12 are input. The delay determination unit 53 determines the delay in the manufacturing processes of the first workpiece manufacturing line 11 and the second workpiece manufacturing line 12 by comparing the manufacturing plan input to the plan input unit 43 with the manufacturing results (manufacturing status) of the first workpiece manufacturing line 11 and the second workpiece manufacturing line 12. The output unit 47 displays the manufacturing plan related to the manufacturing plan input to the plan input unit 43 on the graph on the liquid crystal monitor 7a and outputs data for displaying information indicating that a delay has occurred to make the delay recognized. Therefore, while displaying the delay in the manufacturing processes of the first workpiece manufacturing line 11 and the second workpiece manufacturing line 12, the difference between the manufacturing plan and the manufacturing results (manufacturing status) can be clarified.

[0067] And the output unit 47 outputs data for causing the graph showing the manufacturing status of the workpiece manufacturing line determined to be delayed by the delay determination unit 53 among the graphs to blink and be displayed. Thus, the manager can clearly recognize the completed product manufacturing line 1 that is delayed.

[0068] And, the lower traveling body 101 and the upper revolving body 102 are provided with RFID tags 33 that store information identifying the lower traveling body 101 and the upper revolving body 102. The first detection unit 3a and the second detection unit 3b are RFID readers 31 arranged in plurality on the first workpiece manufacturing line 11 and the second workpiece manufacturing line 12. Among the RFID tags 33, the information stored in the RFID tags 33 passing through the RFID reader 31 is extracted. Thus, it is possible to reliably detect the process in which the lower traveling body 101 and the upper revolving body 102 are located and monitor the manufacturing status.

[0069] And, the first detection unit 3a and the second detection unit 3b have video cameras 35 arranged to image at least one process among the processes on the first workpiece manufacturing line 11 and the second workpiece manufacturing line 12. The delay determination unit 53 determines the delay of the process imaged by the video camera 35 based on the video imaged by the video camera 35. Thus, it is possible to suitably determine the delay within each process.

[0070] And, at least one of the lower traveling body 101 and the upper revolving body 102 is provided with a transmitter 39 that transmits the position information of at least one of the lower traveling body 101 and the upper revolving body 102. 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 traveling body 101 and the upper revolving 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 traveling body 101 and the upper revolving body 102 received by the receiver 37. Thus, even in a case where, for example, when moving to the next process, it moves to a different site, it is possible to detect the delay due to congestion or the like occurring during the movement and monitor the manufacturing status.

[0071] And, since the liquid crystal monitor 7a is included in the portable display unit 7, the administrator can carry the display unit 7 and monitor the manufacturing site while performing other work.

[0072] Thus, the description of the name of the invention according to the present invention is completed. However, the present invention is not limited to the above-described embodiments and can be modified without departing from the gist of the invention. For example, in the present embodiment, in step S101 during the delay determination control, the product manufactured in the time zone specified by the administrator via the input unit 7b of the display unit 7 is selected as the product for which the delay determination is to be made. However, the product that is delayed by more than the specified value compared to the production plan input to the production plan input unit 43 and the products before and after it may be selected as the products for which the delay determination is to be made.

[0073] Also, in the present embodiment, in step S101 of the delay determination control, the product manufactured in the time zone specified by the administrator via the input unit 7b of the display unit 7 is selected as the product for which the delay determination is to be made. However, all the products located on the finished product production line 1 may be automatically selected as the products for which the delay determination is to be made without the operation of the administrator.

[0074] Also, in the present embodiment, the process in which a delay occurs in the graph is surrounded by the blinking circle C, the video of the process in which a delay occurs is displayed in the small window W, and the graph of the actual value is blinked to let the administrator recognize that a delay has occurred. However, it may be recognized by sound or vibration, or a combination of display and these may be used.

Explanation of Signs

[0075] 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 terminal) 7a Liquid crystal monitor (monitor) 11 First semi-finished product production line 12 Second semi-finished product 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 traveling body (first work-in-progress) 102 Upper slewing body (second work-in-progress)

Claims

1. A manufacturing management system for a construction machine, which manufactures a first component of the construction machine as a first work-in-progress on a first work-in-progress manufacturing line, manufactures a second component of the construction machine as a second work-in-progress on a second work-in-progress manufacturing line, and combines the first work-in-progress and the second work-in-progress on a completion line to manufacture the construction machine as a finished product, comprising: a first monitoring unit that monitors the manufacturing status of the first work-in-progress on the first work-in-progress manufacturing line; a second monitoring unit that monitors the manufacturing status of the second work-in-progress on the second work-in-progress manufacturing line; a monitor that displays predetermined information to an administrator; a control device that controls the predetermined information to be displayed on the monitor, and the control device a delay determination unit that determines whether 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 determines whether 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; For the monitor, the manufacturing status of the first work-in-progress, the second work-in-progress, and the finished product in the first work-in-progress manufacturing line, the second work-in-progress manufacturing line, and the finished line is shown with the horizontal axis representing time and the vertical axis representing each manufacturing process of the first work-in-progress manufacturing line, the second work-in-progress manufacturing line, and the finished line. The start to completion of the manufacturing of one of the first work-in-progress in the first work-in-progress manufacturing line is connected by one line, the start to completion of the manufacturing of one of the second work-in-progress in the second work-in-progress manufacturing line is connected by one line, the completion of the manufacturing of one of the first work-in-progress in the first work-in-progress manufacturing line and the completion of the manufacturing of one of the second work-in-progress in the second work-in-progress manufacturing line and the start of the combination of one of the first work-in-progress and one of the second work-in-progress in the finished line are each connected by one line, and the start of the combination of one of the first work-in-progress and one of the second work-in-progress in the finished line to the completion of the manufacturing of one construction machine as the finished product is connected by one line. A graph is displayed, and information indicating that a delay has occurred in the manufacturing process of the work-in-progress manufacturing line determined by the delay determination unit among the first work-in-progress manufacturing line and the second work-in-progress manufacturing line is output. An output unit that outputs data for causing the display to display the above is provided. A manufacturing management system for construction machinery, characterized by having the above.

2. The control device has a plan input unit to which the manufacturing plans of the first work-in-progress manufacturing line and the second work-in-progress manufacturing line are input. The delay determination unit determines whether a delay has occurred in the manufacturing process of the first work-in-progress manufacturing line and the second work-in-progress manufacturing line by comparing the manufacturing plan input to the plan input unit with the manufacturing status of the first work-in-progress and the second work-in-progress. The output unit causes the information indicating the manufacturing plan input to the plan input unit to be displayed on the graph and outputs data for causing the monitor to display the information indicating that the delay has occurred. The manufacturing management system for construction machinery according to claim 1, characterized by the above.

3. The output unit outputs to the monitor data for causing the graph showing the manufacturing status of the work-in-progress manufacturing line determined to be delayed by the delay determination unit among the graphs to be displayed with the graph blinking. The manufacturing management system for construction machinery according to claim 2, characterized by the above.

4. The first workpiece and the second workpiece are provided with an information storage device for storing information for identifying the first workpiece and the second workpiece. The first monitoring unit and the second monitoring unit are arranged in plurality on the first workpiece manufacturing line and the second workpiece manufacturing line. Among the information storage devices, an information reading device for extracting the information stored in the information storage device passing through the first monitoring unit and the second monitoring unit. The manufacturing management system for construction machinery according to claim 1, characterized in that.

5. The first monitoring unit and the second monitoring unit have an imaging device arranged to image at least one process among the first workpiece manufacturing line and the second workpiece manufacturing line. The delay determination unit determines a delay in the process imaged by the imaging device based on the video imaged by the imaging device. The manufacturing management system for construction machinery according to claim 1, characterized in that.

6. At least one of the first workpiece and the second workpiece is provided with a transmitter for transmitting at least one position information of the first workpiece and the second workpiece. At least one of the first monitoring unit and the second monitoring unit is a receiver for receiving at least one position information of the first workpiece and the second workpiece transmitted from the transmitter. The delay determination unit determines the delay based on at least one position information of the first workpiece and the second workpiece received by the receiver. The manufacturing management system for construction machinery according to claim 1, characterized in that.

7. The monitor is included in a portable tablet terminal. The manufacturing management system for construction machinery according to claim 1, characterized in that.

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