JPH0310358B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a sewing machine sewing management device that is capable of measuring the sewing machine operation status of each worker in a sewing factory. [Prior art and problems to be solved by the invention] Traditionally, garment factories have had a labor-intensive production system, and they have developed a scientific and rational method of sewing that helps workers increase their sewing machine utilization rate. A management device was requested. The present invention was made in response to this need, and it displays the operating status of the sewing machine during sewing work on an operating graph, and also displays the sewing progress of the sewing machine in terms of the number of stitches, so that it can be grasped instantly. The aim is to increase the operating rate of sewing machines and improve productivity by improving the sewing skills of each worker, as well as to make it possible to manage production volume. [Means for Solving the Problems] To this end, the present invention provides a sewing speed detecting means 4 for detecting the sewing speed in relation to the sewing machine main shaft, and a stitch count for adding up the number of stitches in relation to the rotation of the sewing machine main shaft. Counter 9 and stitch number setting section 27a for setting a predetermined number of stitches
and a stitch number detection means 27, S8 that detects that the number of stitches added by the stitch number counter reaches a predetermined number of stitches;
The sewing speed detected by the sewing speed detection means is recorded in the operation graph in relation to the elapsed work time S5, and the time of the predetermined number of stitches detected by the number of stitches detection means is recorded in relation to the elapsed work time in this operation graph. S26
The present invention provides a sewing management device for a sewing machine, characterized in that it is equipped with an operation recording means 35 configured to perform the following steps. [Example] An example of the present invention will be described below based on the drawings. Normally, to complete a sewn product, multiple workers share the entire sewing process. In Figure 1, 1 is a sewing machine that is one of several installed in a garment factory, and workers use this sewing machine 1 to repeatedly sew one process for the required number of pieces. It is. The sewing machine 1 drives a main motor 2 to rotate the main shaft of the sewing machine, and in conjunction with this main shaft, forms stitches on the cloth and feeds the cloth. 3 emits pulses in proportion to the rotation angle of the main shaft. It is a main shaft pulse generator that outputs, and converts the main shaft rotation speed (sewing speed) into voltage using the F/V conversion circuit (sewing speed detection means) 4 and inputs it to the CPU 5. The data of the time measurement means 7 for each rotation speed, which cumulatively adds the duration for each rotation speed, is input to the CPU 5 through the voltage discrimination means 6, which divides the rotation speed into predetermined levels such as high and low speeds. On the other hand, the needle position detector 8 detects the output pulse of the main shaft pulse generator 3.
Detects when a stitch is formed, and inputs the number of stitches counted by the stitch counter 9 to the CPU 5, and calculates the number of stitches in one shared process in advance, and determines the number of stitches corresponding to this number. The output of the discrimination circuit 10 that makes it possible to discriminate the end of one process as
Input to CPU11. The CPU 11 is an arithmetic control means that detects the end of one process in a process that is to be repeated by workers, and inputs the end of the process to the CPU 5 by the process end detection means 12, and the process continues until the end of the process. Process time measurement unit 1 that calculates the time of
3, and a sewing number counter 14 for determining the output of the worker can be input to the CPU 5. In addition to the discrimination circuit 10 based on the number of stitches, the following information sources are used by the CPU 11. That is, the well-known cloth detection unit 1 is capable of detecting the presence or absence of cloth placed on a sewing machine and determining whether or not sewing is performed.
5. An automatic thread cutter 16 of the sewing machine that operates at the end of one process, a pattern sewing detection unit 17 that enables pattern sewing by moving the fabric using a predetermined feeding device and guide device, and determining the end of a process, and an electronic memory. A program sewing detector 18 automatically completes sewing according to a predetermined sewing order stored in the means, determines the length of thread required to complete the sewing in the process, and determines whether thread corresponding to this length is consumed during sewing. A thread pay-out amount detection unit 19 that can detect the rotation of the main shaft of the sewing machine, a pedal switch 20 that can be stepped on by the operator to start and stop the rotation of the main shaft of the sewing machine, and a pedal switch 20 that can be stepped on by the operator to start and stop the rotation of the main shaft of the sewing machine. The timer 21 detects the end of a single process, and other switches installed on the sewing machine such as the presser foot position detection switch, thread breakage detection switch, bobbin thread remaining amount detection switch, feed direction detection switch, etc., detect sewing interruptions. In order to be related to the detection of the end of a single process, input can be made as appropriate.In addition, if a hanger system is used to move the cloth as an information source, the movement position detection switch, and each operation switch in the cloth press work process. , or an output signal from a detection controller may be used as the input information source. 22 is an attached mechanism F (numerals 10, 1) of the sewing machine mentioned above.
This is a process end detection condition setting unit for selecting a plurality of input signals inputted from 5 to 21, etc.) and setting detection conditions so that the CPU 11 can detect the end of the process. There are many types of sewing machines, especially industrial sewing machines, and how to use them has become complicated due to the steps of the sewing work process, which are divided among workers. This is because it is not always possible to accurately detect the end of a process. For example, when using a hem sewing machine to sew a large number of pieces of the same small piece of fabric, oversewing is performed continuously without stopping the sewing machine, so it is not possible to detect the end of the process just by detecting the number of stitches. . Therefore, when the cloth is detected by the cloth detecting section 15, a predetermined number of stitches have been sewn, and the cloth is discharged, it is assumed that one piece of cloth has been hemmed and one process is completed. In this case, the process end detection condition setting unit 22 stores in the RAM 23 such that the process end is determined according to the flow shown in FIG. 7 based on each input signal from the fabric detecting unit 15 and the determining circuit 10. In addition, if there is always a thread trimming operation at the end of the process, it is possible to accurately determine the number of stitches even if there is a slight increase or decrease in the number of stitches at the end of actual sewing based on each input signal from the discrimination circuit 10 and the thread trimming section 16. It is possible to determine the end of the process. Furthermore, input signals from the timer 21 and the pedal switch 20 may be added. In addition, a pattern sewing detector 17 and a program sewing detector 1
In No. 8, the end of the process can be easily detected using a detection switch on each sewing machine mechanism or on the software, and the CPU 11 can determine the end of the process from this detection signal. Furthermore, if the sewing work process divided by workers requires multiple sewing machine operations to complete one process,
Alternatively, if one process is completed by using multiple different sewing machines or other mechanical equipment in combination, it is also possible to program the program to detect the process sequentially to follow the flow of each sewing process and determine when the process has ended. be. Reference numeral 24 denotes a work classification means, which determines the work process based on the input signal from the sewing machine attachment mechanism F such as a fabric detection unit, and also distinguishes between the operations performed by the operator while the sewing machine is stopped as shown in Table 1. This is determined by the output signal from the classification switch 25 pressed by the operator, and the elapsed time and number of operations for each stop operation are calculated by the operation time and number counter 26 and input to the CPU 5.

[Table] Reference numerals 22, 26, 27a, 28, and 29 are setting input sections from the operation panel (not shown) that operate this device, and input may be made from a keyboard, or an IC card or the like that stores each data in advance. Information media may also be used. Reference numeral 26 denotes a process stitch number setting unit for inputting and storing the number of stitches to be sewn in one process in advance so that the determination circuit 10 can determine the end of the process. 27 is a predetermined needle detection unit that compares the operation status of one process or multiple processes together according to the number of stitches input in the process stitch number setting unit 26 with the operation status of another person during the same process, and makes it possible to check the operation status. It is provided with a predetermined stitch number setting section 27a for inputting and setting the check time as the stitch number. The predetermined number of stitches is set by calculating the quotient of the number of stitches set in the process stitch number setting section 26 by a divisor N (for example, 2, etc.) or an integer value close to the quotient, and inputting the obtained value to the process stitch number setting section 26. The information may be entered automatically at times. Reference numeral 28 denotes a cumulative unit setting section for inputting a period for cumulative addition in the rotation speed-specific time measuring means 7. As this period, for example, the process end is determined based on the process end detection signal outputted from the process end detecting means 12. This is the period until detection is performed a predetermined number of times. This is because if one process ends in a particularly short time, the data in the time accumulation section 7 by rotation speed may vary and become inaccurate. The aim is to obtain accurate detected values by calculating the average value. Reference numeral 29 denotes a standard work amount setting section, which sets the standard number of operations or classification switch 2 of the attached mechanism F of the sewing machine corresponding to the worker's work process and its work amount.
By inputting in advance the standard working time and number of operations while the sewing machine is stopped, which are output from 5, it is possible to determine that the sewing machine is malfunctioning, for example, if there are abnormally many thread breaks during the operation of the attached mechanism of the sewing machine. An alarm may be sounded as follows. Furthermore, it is possible to compare and analyze the operating status of work with standard work or the work of other workers. 30 and 31 are RAM and ROM connected to CPU5,
32 is a host computer that provides an output signal from the CPU 5, which centralizes the data of a plurality of devices connected to a working machine such as a sewing machine, and displays the data on a display means 33 such as a CRT or printer;
The data can be stored in the storage means 34. Reference numeral 35 denotes an operation recorder, which is connected to the host computer 32 and is connected to the host computer 32 in order to draw an operation graph (see Figs. 5 and 6) showing changes in sewing speed of the sewing machine on the horizontal axis with working time on the recording paper. This allows data from the sewing machine to be recorded simultaneously. The operation recorder 35 may be connected to the CPU 5 to serve as a recorder for a small number of sewing machines, and can be installed according to the scale of the device. The operation recorder 35 includes an X-Y recorder, a pen recorder, and other devices capable of graphing the operation status. Next, the operation of this device will be explained. In Figure 2, after initializing the setting section, the setting input section 2
2. Enter predetermined values in 26 to 29 and turn on the operation recorder 35 (S ₁ to _{S 3} ). When the main power of the sewing machine 1 is turned on and the operator starts sewing (S ₄ ), the operator turns on the foot pedal, which causes the main shaft to rotate and the F/V conversion circuit (sewing speed detection means) 4 to turn on. An operation graph as shown in FIG. 5, for example, is drawn by obtaining the output signal. This operation graph compares the operation status when a veteran worker A and an inexperienced worker B operate the sewing machine equipped with this device. You can tell at a glance that it is fast. The cause of this is that B pauses at points a and b in the graph, and it can also be seen that, as at point c, there is a habit of first pressing the foot pedal slowly and then continuing sewing. . Previously, work instructors were unable to objectively identify the ``habits'' of workers that caused work delays, but with this device, they can now identify them at a glance, making work guidance more specific and improving operating rates. Helpful and productive. Next, the operation status during sewing is graphed and recorded as described above, and the following four types of discrimination are displayed on the graph with working time as the horizontal axis. That is, according to the flowchart shown in FIG. 3 as the operation record routine (S ₆ ), firstly, the output of the work classification means 24 changes and it is determined when a different work is started (S ₇ );
Second, it is determined whether the predetermined number of stitches has been reached in the predetermined number of stitches detection means 27 (S ₈ ), thirdly, it is determined whether there is an output from the process end detection means 12 (S ₉ ), and fourth, the cumulative unit setting section 28 is It is determined whether the set number of steps has been reached (S ₁₀ ). First, when different tasks are determined (S ₇ ),
The work classification determination routine (S ₁₁ ) (see Figure 4) is entered. If the main shaft starts rotating from the stopped state of the sewing machine, the process is not executed ( _S12 ), and if the main shaft has stopped rotating (points c and d in Figure 5),
When an attached mechanism F of the sewing machine such as a thread breakage detection device is operated (S ₁₃ ), the operation is displayed (S ₁₄ ), and a work classification counter (S ₁₅ ) is counted. If attached mechanism F does not operate, see Figure 5c.
A delay circuit (S ₁₆ ) is passed through to distinguish the sewing machine from stopping due to the "quick" step during the point sewing process.
Additionally, restarting after cloth replacement at the end of the process (S ₁₇ )
Or, it is determined whether the classification switch 25 has been turned on and the stopped operation has started (S ₁₈ ). When the classification switch 25 is turned on, as shown in the graph corresponding to the output voltage shown in Table 1 (point e in Figure 6), the minus display corresponds to the elapsed work time as an operation display (S ₁₉ ) when the sewing machine is stopped. At the same time, the work classification counter (S ₁₅ ) is activated and compared with the work standard 29 (S ₂₀ ). It is determined that the sewing machine requires repair (S ₂₁ ),
An alarm is automatically generated to the administrator and a maintenance request (S ₂₂ ) is made. Managers can prevent a decline in production by making repairs as soon as possible. In addition, after the cloth replacement time has passed, the classification switch 25 is turned on.
If not, a timer (S ₂₃ ) is activated and an alarm (S ₂₄ ) is automatically output to turn on the classification switch. Note that the graph display of the classification switch 25 is not limited to the negative length as described above, but may also be a display corresponding to the type of the classification switch 25 in the graph or in a blank area of paper apart from the graph. This can be changed in various ways, such as by inputting verbally. By operating the classification switch while the sewing machine is stopped, it is now possible to see what is happening when the sewing machine is not operating. Therefore, this content has made it easier for managers to discover waste and enable them to take effective measures aimed at efficient production. Next, in determining whether the number of stitches set in the predetermined stitch number setting section 27a of the predetermined stitch number detection means 27 has been reached (S ₈ ), for example, the predetermined stitch number setting section 27a is
If 100 is set, each time the stitch count counter 9 increases by 100 stitches after the start of sewing, a sign or symbol to that effect is displayed on the operation graph corresponding to the time during the working time ( S ₂₆ , Figure 6 f~
i point). Further, cumulative stitch count information from the stitch count counter 9 is transmitted to the host computer 32 and stored, so that the operating status of the sewing machine can be grasped. This has the effect of facilitating comparison with other people's operation graphs when one process is long and the operation graphs are completely different due to differences in sewing skills.
Furthermore, by knowing the cumulative number of stitches, the cumulative performance of the worker can be accurately obtained. Next, when there is an output from the process end detection means 12 (S ₉ ), a sign or symbol to that effect is added to the operation graph corresponding to that time during the working time (S 9 ). ₂₈ , Figure 6 points j and k). Furthermore, the time interval measured by the elapsed time measurement section 13 during this one process and the cumulative number of sheets from the sheet number counter 14 are displayed in the operation graph as necessary and stored in the host computer 32. With this display, when the operation graph is complex and the end of the process is unknown, the process end classification becomes clear and comparison with other people's operation graphs becomes extremely easy. Furthermore, the cycle time of the sewing process can be accurately determined, and the output can be determined in real time. Next, when it is determined that the number of processes set in the cumulative unit setting section 28 has been reached (S ₁₀ ), each driving time measured by the rotation speed-specific time measuring means 7 during the elapsed time is determined. A code or symbol is attached to the operation graph in correspondence with the time during the working time (S ₃₀ ). In FIG. 6, the number of steps is set to 1, and the driving time is displayed in three stages: low speed, medium speed, and high speed (FIG. 6 l to n). By comparing with others based on this determined number, it is possible to objectively analyze and evaluate the sewing skill, which considers a long high-speed drive time to be good from the standpoint of production efficiency. [Effects of the Invention] The present invention has the above-described configuration and operation, and displays the operation status of the sewing machine by the operator on the operation graph, and also displays the sewing machine operation status in the operation graph when sewing a predetermined number of stitches in one process. By attaching a display to that effect in conjunction with the time, the progress of sewing becomes clear and it becomes possible to directly compare the operation graph with someone else's operation graph. Delay points can be accurately determined. Furthermore, by using the above technology, it is possible to accurately compare the waveform of the operation graph and the sewing process, so it is possible to identify the worker's "habits" and work-related problems expressed in the waveform, and to identify them in the sewing environment. It can be used for improvement and sewing guidance, and can improve production efficiency.

[Brief explanation of the drawing]

Figure 1 is a block diagram of this device, Figures 2 to 4 are flowcharts, Figures 5 and 6 are operation graphs recorded by an operation recorder, and Figure 7 is an implementation of a process detection flowchart. This is an example. e...Display of work while stopped, f-i...Display of predetermined number of stitches, j, k...Display of completion of one process, l-n...Display of sewing time for each number of revolutions.

Claims (1)

[Scope of Claims] 1: a sewing speed detecting means 4 for detecting the sewing speed in relation to the rotation of the sewing machine main shaft; a stitch number counter 9 for adding up the number of stitches in relation to the rotation of the sewing machine main shaft; The number of stitches to be set is set by the number of stitches setting unit 27a, the number of stitches detecting means 27, S8 which detects when the number of stitches added by the number of stitches counter reaches the predetermined number of stitches, and the sewing speed detected by the sewing speed detecting means is calculated as the elapsed work time. S5 is recorded in the operation graph in relation to this, and the predetermined number of stitches detected by the stitch number detection means is recorded in relation to the elapsed work time in this operation graph S2
6. A sewing management device for a sewing machine, comprising: an operation recording means 35 configured to perform the following steps.