TWI844236B - Sewing machine pre-mass-production learning method and auxiliary kit - Google Patents

Abstract

A sewing machine pre-mass-production learning method and auxiliary kit, the method included a style selection step, an input step, a sewing step, a sensing step, a measuring step, a calculation step and a storage step. After the above steps are carried out, the host obtained the amount relationship between the needle thread and the bobbin thread, and the needle thread sensing device detects the moving amount of the needle thread when sewing the same pattern/style, so as to estimate the remaining amount of the bobbin thread. In this way, when the sewing machine is activated and mass-produced, the current remaining amount of bobbin thread can be estimated from the detected movement of the needle thread to avoid running out of the bobbin thread.

Description

Sewing machine pre-production learning method and auxiliary kit

The present invention relates to a method for estimating the remaining amount of bottom thread of a sewing machine, and a sewing machine auxiliary kit.

The computerized sewing machine can automatically sew two pieces of sewing material together by forming a seam with an upper thread and a lower thread. The upper thread needs to be replaced less frequently than the lower thread because the lower thread is installed at the bottom of the sewing machine and is located on the bobbin. The bobbin cannot be seen during normal operation of the sewing machine. Usually, the lower thread is used up only after sewing for a period of time.

When the above situation occurs in the sewing parts, there are usually two ways to do it. One is to continue sewing on the sewing parts, and the other is to remove all or part of the seams and sew again. The above-mentioned continuous sewing will leave a poor appearance on the sewing parts, which is not aesthetically pleasing. Removing all or part of the seams will affect production efficiency. Regardless of which of the above methods is used, there will be defects in unstable sewing quality.

Nowadays, there are traditional sewing machines and computerized sewing machines. Traditional sewing machines require manual replacement of the shuttle thread, while computerized sewing machines can use automatic shuttle changing devices. Currently, the automatic shuttle changing devices on the market use mechanical probes to detect the amount of thread used. The probes are inserted into the shuttle housing to detect the amount of thread in the shuttle and replace the shuttle at regular intervals.

The aforementioned probe detection is performed once a single continuous path is completed. Although it can detect the actual amount of thread remaining on the bottom line, it will take more time and affect productivity. Regularly replacing the bobbin will waste more residual bottom line thread.

The present invention discloses a sewing machine pre-production learning method, comprising: a style selection step, selecting a sewing pattern/style on a host machine; an input step, inputting the total length of the upper thread and the total length of the lower thread on the host machine; a sewing step, the sewing machine operates to sew the pattern/style on the sewing piece with the upper thread and the lower thread; a sensing step, when the aforementioned pattern/style is sewn, the upper thread sensing device on the sewing machine detects the movement of the upper thread and senses the movement of the upper thread. The movement amount of the upper thread is transmitted to the host machine; the measuring step is to take off the remaining bottom thread and measure its length, and then input the remaining length of the bottom thread into the host machine; the calculating step is to calculate the sewing amount of the bottom thread in the above pattern/style by deducting the remaining length of the bottom thread from the total length of the bottom thread by the host machine; the storing step is to store the ratio of the movement amount of the upper thread to the sewing amount of the bottom thread in the host machine, and define the usage ratio of the upper thread to the bottom thread of the selected pattern/style.

Accordingly, by implementing the above steps, the host machine obtains the relationship between the upper thread and the lower thread usage, and the upper thread sensing device detects the movement of the upper thread when producing the same pattern/style, so as to estimate the remaining amount of the lower thread. In this way, when the sewing machine is activated and officially sews mass production, the current remaining amount of the lower thread is estimated by detecting the movement of the upper thread to avoid running out of the lower thread. When the host machine sets the remaining amount of the lower thread to be insufficient to complete the sewing work of the next pattern/style (single continuous path), the sewing machine can be stopped, and the host machine can start the shuttle changing mechanism to change the shuttle. After the shuttle change is completed, the host machine can start the sewing machine again, or change the shuttle manually.

S01: Select style step

S02: Input step

S03: Sewing steps

S04: Sensing step

S05: Measurement step

S06: Calculation steps

S07: Save step

100:Host

110: Database

111: Style module

112: Recording module

113: Noodle style

114: Bottom line style

115:Sewing style

120: Control unit

130: Input unit

140: Display unit

200: Noodles

300: Bottom line

400:Sewing machine

500: Upper thread sensor device

510: driven wheel

520: Encoder

530: Rotating axis

540:Framework

541: Rotating slot

550: Auxiliary wheel

601: Top stitching

602: Bottom seam

The first figure is a schematic diagram of the process of the present invention.

The second figure is a schematic diagram of the auxiliary kit of the present invention installed on a sewing machine.

The third picture is a schematic diagram of the pattern and path of sewing stitching.

The fourth figure is a diagram showing the usage of upper and lower threads during sewing.

The fifth picture is a diagram for learning how to sew the same pattern/style.

The sixth figure is a schematic diagram of the auxiliary kit block of the present invention.

The seventh figure is a three-dimensional schematic diagram of the surface line sensing device.

Figure 8 is a side view diagram simulating the upper thread passing through the upper thread sensing device.

The ninth figure is a top view schematic diagram simulating the upper thread passing through the upper thread sensing device.

Please refer to the first figure, which discloses a sewing machine pre-production learning method, and please refer to the second to sixth figures. The aforementioned method includes a style selection step S01, an input step S02, a sewing step S03, a sensing step S04, a measuring step S05, a calculation step S06 and a storage step S07, wherein: the style selection step S01, selects the sewing pattern/style on the host machine 100; the aforementioned sewing pattern/style selected on the host machine 100 is to match the sewing pattern/style selected on the sewing machine 400; the input step S02, the sewing step S03, the sensing step S04, the measuring step S05, the calculation step S06 and the storage step S07. 02, input the total length of the upper thread 200 and the total length of the lower thread 300 on the host machine 100; the aforementioned lower thread 300 refers to the shuttle part wound around the sewing machine 400; sewing step S03, the sewing machine 400 operates to sew the pattern/style on the sewing piece with the upper thread 200 and the lower thread 300; sensing step S04, when sewing the aforementioned pattern/style, the upper thread sensing device 500 on the sewing machine 400 detects the upper thread 20 0 movement, and transmits the movement amount of the upper thread 200 sensed by it to the host machine 100; the movement of the upper thread 200 detected by the upper thread sensing device 500 refers to the part from the upper thread supply device to the sewing machine 400; the sensing step S04 includes cutting sensing and sheet changing sensing; the measuring step S05, after removing the remaining bottom thread 300 and measuring its length, inputs the remaining length of the bottom thread 300 into the host machine 100; the remaining bottom thread 300 refers to the sewing The remaining part of the bottom thread 300 in the bobbin after sewing; the calculation step S06, the host machine 100 calculates the total length of the bottom thread 300 and deducts the remaining length of the bottom thread 300, and calculates the sewing amount of the bottom thread 300 for the above pattern/style; the storage step S07, stores the ratio of the movement amount of the upper thread 200 and the sewing amount of the bottom thread 300 in the host machine 100, and defines the usage ratio of the upper thread 200 to the bottom thread 300 of the selected pattern/style.

By executing the above steps, the host machine 100 obtains the usage relationship between the upper thread 200 and the lower thread 300, and when producing the same pattern/style, the upper thread sensing device 500 detects the movement of the upper thread 200 to estimate the remaining amount of the lower thread 300. In this way, when the sewing machine 400 is activated and officially sews mass production, the current remaining amount of the lower thread 300 is estimated by detecting the movement of the upper thread 200 to avoid running out of the lower thread 300. When the host machine 100 sets the remaining amount of the bottom thread to be insufficient to complete the sewing work of the next pattern/style (single continuous path), the sewing machine 400 can be stopped, and the host machine 100 can start the shuttle changing mechanism to change the shuttle. After the shuttle change is completed, the host machine 100 can start the sewing machine 400 again, or the shuttle can be changed manually.

For example, as shown in the third figure, the figure discloses a pocket flying bird stitch pattern/style (this pattern/style has 8 stitching paths and stitches), and the pocket flying bird stitch pattern/style disclosed in the figure is sewn, and the sewing process is shown in the fourth figure, where the upper sewing piece 601 is stacked on the upper surface of the lower sewing piece 602, and the sewing needle pierces the upper sewing piece 601 and the lower sewing piece 602, while pulling the upper thread 200 through and rotating the shuttle, so that the bottom thread 300 passes through the looped upper thread 200, and a single sewing path is performed. The same pocket flying bird stitch pattern/style is sewn 5 times, as shown in (I) to (IV) in the fifth figure. The cutting sensing in the sensing step S04 refers to the action of the cutter after the sewing of the single flying bird stitch pattern/style is completed (cutting the upper thread 200 and the bottom thread 300 by the swing of the cutter). The sheet changing sensing in the sensing step S04 refers to the action of the pressing plate rising relative to the upper stitching piece 601 from the original pressing position after the sewing pattern/style is completed.

Based on the above situation, assuming that the total length of the upper thread 200 is 105 cm, and the total length of the lower thread is 105 cm, after sewing the pocket bird stitch pattern/style 5 times, the upper thread sensor 500 detects that the movement of the upper thread 200 is 50 cm, and the remaining length of the lower thread 300 measured by the removed bobbin is 55 cm, which is input into the host 100. The host 100 calculates the total length of the lower thread 300, 105 cm, minus the remaining length of the lower thread 300, and calculates the length of the lower thread 300 in the above pattern. The sewing amount of the pattern/style is 50 cm, the ratio of the movement amount of the upper thread 200 50 cm to the sewing amount of the bottom thread 300 50 cm is stored in the host computer 100, and the host computer 100 defines the usage of the upper thread 200 and the bottom thread 300 of the selected pocket flying bird sewing pattern/style. In the future, during sewing production, the movement amount of the upper thread 200 can be detected by the upper thread sensing device 500 on this basis, and the remaining length of the bottom thread 300 can be estimated by the host computer 100, so as to avoid the situation where the bottom thread 300 is used up. Assume that after the 10th pocket bird sewing pattern/style is performed, the host machine 100 has calculated that the remaining amount of the bottom thread 300 is insufficient to perform the 11th pocket bird sewing pattern/style, and the sewing machine 400 stops operating.

The aforementioned style/pattern includes a sewing path, and the host computer 100 calculates the average bottom line 300 usage length of each path of the style/pattern.

In particular, the present invention provides a sewing machine auxiliary kit as shown in the sixth, seventh and second figures, which is installed on the sewing machine 400 and includes: a host 100, including a database 110, a control unit 120, a display unit 140, and can execute a calculation and planning learning program on the control unit 120; and an upper thread sensing device 500, which is electrically connected to the host 100; the execution of the calculation and planning learning program is a step of the above-mentioned sewing machine pre-production learning method.

The database 110 includes a style module 111 and a recording module 112. The style module 111 includes an upper thread style 113, a lower thread style 114, and a sewing piece style 115. The upper thread style 113 and the lower thread style 114 refer to the material type of the upper thread 200 and the lower thread 300, such as cotton thread, nylon thread, etc. The sewing piece style 1155 refers to the material of the sewing object, such as cotton, linen, nylon, polyester fiber, silk, leather, wool, etc. Since the material tension of the wire and the material of the sewing piece affect the sewing of the upper thread 200 and the lower thread 300, the host computer 100 database 110 is used to access various materials and sewing characteristics, and set processing parameters to facilitate the process of learning the method before mass production of the sewing machine.

The recording module 112 stores the total length of the upper thread 200, the total length of the lower thread 300, the movement of the upper thread 200, the remaining length of the lower thread 300, the ratio of the movement of the upper thread 200 to the sewing amount of the lower thread 300, the ratio of the upper thread 200 to the lower thread 300 of the selected pattern/style, and other numerical values, style/form data.

The host 100 further includes an input unit 130. The input unit 130 allows the user to operate the host, input values, execute the aforementioned calculation planning learning program, pattern/style setting program, and sewing production program, etc. The input unit 130 can be an external keyboard or mouse connected to the host 100 by wire or wireless.

In addition to the above-mentioned host 100 having an external wired or wireless connection form of the input unit 130. The display unit 140 can also be used as a touch screen; and the touch screen displays an operation interface; the operation interface includes style setting, style display, learning mode and production line mode, which allows users to directly operate the touch screen to input, operate, set, and execute the above-mentioned data. In addition, the display unit 140 also displays the total length of the upper thread 200, the total length of the bottom thread 300, the movement of the upper thread 200, the remaining length of the bottom thread 300, the ratio of the movement of the upper thread 200 to the sewing amount of the bottom thread 300, the usage ratio of the upper thread 200 and the bottom thread 300 of the selected pattern/style, and other numerical values, style/form data.

Please refer to the seventh to ninth figures, which disclose that the upper thread sensing device 500 includes a driven wheel 510 and an encoder 520, and the driven wheel 510 rotates to drive the encoder 520; when the upper thread 200 circles around the driven wheel 510, so that the upper thread 200 is pulled, the upper thread 200 drives the driven wheel 510 to rotate, and the driven wheel 510 synchronously drives the encoder The shaft 530 of 520 rotates, and the mechanical displacement signal of the shaft rotation is converted into an electronic signal by the encoder 520 and the rotation angle of the driven wheel 510 is calculated by the host 100. The movement amount of the upper thread 200 can be obtained from the known circumference of the driven wheel 510 and the rotation angle of the driven wheel 510 (the sewing process, which can represent the amount of upper thread 200 used in the sewing process).

The upper thread sensing device 500 includes a frame 540, and the driven wheel 510 is rotatably connected to the frame 540 via a rotating shaft and is located in a rotating groove 541 of the frame 540. In addition, the upper thread sensing device 500 can be installed on the body of the sewing machine 400 through the frame 540. Therefore, the present invention is suitable as an additional kit for a general computer sewing machine to increase the original performance deficiency.

The needle thread sensing device 500 includes an auxiliary wheel 550 pivotally mounted on the frame 540 and located around the driven wheel 510; the needle thread 200 passes around the outer circumference of the auxiliary wheel 550 and does not exceed the outer circumference of the auxiliary wheel 550. By passing the needle thread 200 around the auxiliary wheel 550, and the present embodiment adopts two auxiliary wheels 550 respectively located on the entry side and the exit side of the driven wheel 510, the tension of the needle thread 200 entering the driven wheel 510 and leaving the driven wheel 510 can be controlled, not only providing smooth displacement of the needle thread 200, but also allowing the needle thread 200 to smoothly drive the driven wheel 510 to rotate, so as to facilitate the encoder 520 sensing detection.

S01: Select style step

S02: Input step

S03: Sewing steps

S04: Sensing step

S05: Measurement step

S06: Calculation steps

S07: Save step

Claims (10)

A sewing machine pre-production learning method includes: a style selection step, selecting a sewing pattern/style on a host machine; an input step, inputting the total length of the bottom thread on the host machine; a sewing step, the sewing machine operates to sew the selected pattern/style on the sewing piece with the upper thread and the bottom thread; a sensing step, when the selected pattern/style is sewn, an upper thread sensing device on the sewing machine detects the movement of the upper thread, and the movement of the upper thread sensed by the upper thread sensing device is detected. The amount is transmitted to the host computer; the measuring step is to take off the remaining bottom thread and measure its length, and then input the remaining length of the bottom thread into the host computer; the calculating step is to calculate the bottom thread sewing amount of the bottom thread in the aforementioned selected pattern/style by the host computer after deducting the aforementioned remaining length of the bottom thread from the aforementioned total length of the bottom thread; the storing step is to store the ratio of the aforementioned upper thread movement amount to the aforementioned bottom thread sewing amount in the host computer, and define the upper thread to bottom thread usage ratio of the aforementioned selected pattern/style. The sewing machine pre-production learning method as described in claim 1, wherein the aforementioned selected pattern/style includes a plurality of sewing paths, and the host computer calculates the average bottom thread usage length of each sewing path of the aforementioned selected pattern/style. A sewing machine auxiliary kit is installed on the sewing machine and includes: a host computer including a database, a control unit, and a display unit, and can execute a calculation and planning learning program on the control unit; and an upper thread sensing device, which is electrically connected to the host computer; the execution of the calculation and planning learning program is a step of implementing the sewing machine pre-mass production learning method as described in any one of claim items 1 to 2. A sewing machine auxiliary kit as described in claim 3, wherein the database includes a style module and a record module. The sewing machine auxiliary kit as described in claim 4, wherein the style module includes an upper thread style, a lower thread style, and a sewing piece style. A sewing machine auxiliary kit as described in claim 3, wherein the host machine further includes an input unit. The sewing machine auxiliary kit as described in claim 3, wherein the display unit is a touch screen; and the touch screen displays an operation interface; the operation interface includes style setting, style display, learning mode and production line mode. The sewing machine auxiliary kit as described in claim 3, wherein the upper thread sensing device includes a driven wheel and an encoder, and the driven wheel rotates to drive the encoder. The sewing machine auxiliary kit as described in claim 8, wherein the upper thread sensing device includes a frame, and the driven wheel is rotatably connected to the frame via a rotating shaft and is located in a rotating groove of the frame. A sewing machine auxiliary kit as described in claim 9, wherein the upper thread sensing device includes an auxiliary wheel pivotally mounted on the frame and located outside the circumference of the driven wheel; the upper thread passes around the outer circumference of the auxiliary wheel and does not exceed the outer circumference of the auxiliary wheel.

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