KR101095497B1 - Automatic sewing machine - Google Patents

Abstract

The present invention is to monitor the damaged state of the upper thread by the upper thread state monitoring means when the damaged upper thread is supplied from the beginning, or if the upper thread is damaged by excessive friction before forming the bark in the process of supplying the upper thread. By determining whether the upper thread is damaged by the control means, the trimmer is driven to provide an automatic sewing machine configured to forcibly cut the upper thread, thereby interrupting the sewing work due to the single thread of the upper thread and setting the sewing thread of the operator. To solve the problem, and also because the sewing thread is not damaged by the sewing thread can improve the quality of the sewing material.

Description

Automatic sewing machine {AUTOMATIC SEWING MACHINE}

The present invention relates to an automatic sewing machine in which thread take-ups, needles, bobbins, trimming devices, etc. are automatically driven, and in particular, the upper thread state monitoring means for monitoring the upper thread state passing through the upper thread of the upper thread is provided, the state of the upper thread passing the apostle of the upper thread If there is an error relates to an automatic sewing machine made to cut the upper thread with a trimmer.

In general, an automatic sewing machine (also referred to as a "machine") forms a stitched hole (also referred to as a "seam") by the upper thread and the lower thread to continuously manufacture the sewing material.

In general, when sewing, the upper thread passes through the thread take-up (also called "cheonpyeong"), the middle thread hanger, the needle, and the sewing material to be caught in the bobbin (also called "kiln"), and then crosses the bobbin thread supplied from the bobbin. As a result, it is caught and forms a sewn hole with the lower thread.

In order to form the sewn holes as described above, the upper thread moves up and down very rapidly with respect to the thread take-up, the middle thread hanger, the needle, and the sewing material, or rotates with the bobbin at a very high speed.

In addition, the automatic sewing machine is provided with a trimming device, and when sewing is completed, the upper thread and / or the lower thread are trimmed.

In addition, like an automatic sewing machine for embroidery, a plurality of sewing heads are arranged in a line, and a plurality of needles are arranged in parallel for each sewing head, and a trimming device corresponding to the sewing head is provided for each sewing head, respectively. In the case of the sewing machine of the type, one sewing head is supplied with a different color of the upper thread for each needle, and when the color of the upper thread is switched, the upper thread passing through a specific needle is refused, and a different color prepared for the other needle Sewing work is continued by the upper thread.

In the case of this type of automatic sewing machine for embroidery, each sewing head performs the same sewing operation as other sewing heads so that the same type of sewing is performed on the object to be sewing, thereby improving work efficiency.

1 is an overall front view of an automatic sewing machine for embroidery according to the prior art, FIG. 2 is an enlarged front view of the sewing head of FIG. 1, and FIG. 3 is a partially broken side view of FIG.

1 to 3 are drawings published in Japanese Patent Application Laid-open No. Hei 10-295969 "Multiple Embroidery Sewing Machine", and the specification and drawings of Japanese Patent Application Laid-open No. Hei 10-295969 are considered to be incorporated herein.

As shown, in the case of embroidery sewing machine, a plurality of sewing heads 3 are arranged in a single machine, and each sewing head 3 has a plurality of needles 20, a needle bar 6, and a thread take-up 7. The lamp is laid out as each apostle. That is, a plurality of sewing heads 3 are provided in one machine, and a plurality of needles 20 are arranged in parallel for each sewing head 3.

In addition, the needle provided in one of the sewing heads 3 and the needle at the same position provided in the other sewing head 3 operate in the same manner.

1 to 3, the sewing machine table 1, the frame 2, the sewing head 3, the support case 5, the needle bar 6, thread take-up 7, connecting rod (8), drive Only the apparatus 10, the adjusting stand 11, the adjuster 12 and 13, the thread guide part 18, the needle 20, the bobbin 26, etc. were attached | subjected.

In such a conventional automatic sewing machine, there are the following problems.

Damage may occur from the beginning of the twisted upper thread, or even if a normal upper thread (the upper thread without a damaged part) is supplied, the upper thread moves at high speed with respect to the thread take-up, the middle thread hook, the needle, the sewing material, the bobbin, and the like. A part of the twisted upper thread may be damaged by friction during the high-speed reciprocating movement.

Damage of the upper thread as described above, as well as the case of automatic sewing machine driven only by one axis, in particular for embroidery to proceed according to the data previously input while having an X-axis drive device and a Y-axis drive device, such as an electronic embroidery machine In the case of the automatic sewing machine, the tension on the upper thread may be changed irregularly by the movement of the X-axis and the Y-axis, and such irregular tension change further increases the possibility of damage to the upper thread.

When the sewing operation is progressed by the damaged upper thread, the upper thread can be easily cut and threaded even with a slight overload.

If a single thread occurs, the automatic sewing machine automatically stops the sewing operation, and the sewing operation is resumed only after the operator puts the sewing thread in a state in which the thread can be sewn again and put it in the needle. When single yarns occur in this way, the efficiency of the sewing operation is reduced.

In addition, even if the upper thread is damaged, the single thread does not occur and the sewing operation can be continued. That is, the sewing may be produced by the upper thread to be damaged. In this case, a damaged sewing thread and an undamaged sewing thread are visually coarse due to a difference in thickness thereof, and a lint phenomenon occurs in the sewing thread, and the touch of the sewing material becomes worse.

As described above, damage to the upper thread causes a decrease in work efficiency when single yarns occur, and a decrease in sewing quality when single yarns do not occur.

The present invention has been made to solve the problems of the prior art as described above, when the damaged upper thread is supplied from the beginning, or when the upper thread is damaged by excessive friction before forming the bark in the process of supplying the upper thread of the upper thread The present invention relates to an automatic sewing machine configured to monitor a state by upper thread state monitoring means and determine whether damage is detected by the control means with respect to the monitored upper thread state, and the trimming device is driven to forcibly cut the upper thread.

In order to solve the above problems, the present invention comprises a thread take-up, a needle, a bobbin, a trimming device, drive means for driving the thread take-up, the needle, the bobbin, the trimming device, and the drive An automatic sewing machine comprising control means for controlling the means, the automatic sewing machine comprising: an upper thread state monitoring means for monitoring a damaged state of the upper thread passing through an apostle of the upper thread between the thread take-up and the bobbin; When it is determined that there is an abnormality in the state of the upper thread monitored by the upper thread state monitoring means, it is characterized in that the upper thread is cut by controlling the trimming device to be driven.

In the above, it is preferable that the upper thread state monitoring means is an image sensor, and the control means determines whether the upper thread is abnormal based on the image of the upper thread captured by the image sensor.

In the above, the automatic sewing machine is an automatic sewing machine of a type in which a plurality of needles are arranged in parallel to the sewing head, and moving the upper thread state monitoring means to the sewing head passing through any one of the plurality of needles in the sewing head. A monitoring means moving unit is provided, and the upper thread state monitoring means is mounted to the monitoring means moving unit, and the control means is positioned such that the upper thread state monitoring means is positioned at a position capable of monitoring an apostle passing through a needle to be operated. It is preferable to control the means moving unit.

In the above, the automatic sewing machine is a plurality of sewing heads are arranged in a line, each of the sewing head is a type of automatic sewing machine provided with a corresponding thread trimming device, each of the sewing head for the upper thread state monitoring means Are provided respectively, and the control means controls so that only the thread trimming device corresponding to the sewing head in which the upper thread state monitoring means is judged to be abnormal in the state of the upper thread is driven, and there is an abnormality in the state of the upper thread. It is preferable to control the trimming devices corresponding to the other sewing head which are not determined to not be driven.

As described above, the present invention monitors the state of the upper thread by the upper thread state monitoring means when the damaged upper thread is supplied from the beginning or when the upper thread is damaged by excessive friction before forming the bark. The control means for the state of the monitored upper thread is determined by the control means, the trimming device is driven to provide an automatic sewing machine configured to forcibly cut the upper thread,

This eliminates the interruption of the sewing work due to the single thread of the upper thread and the worker's sewing thread setting work, and also because the sewing thread is not formed by the damaged sewing thread can improve the quality of the sewing.

Hereinafter will be described the specific configuration and operation according to an embodiment of the present invention.

4 is a conceptual view of the main part of the automatic sewing machine of an embodiment according to the present invention.

Similar to the conventional automatic sewing machine, the automatic sewing machine of this embodiment is provided with a thread take-up 110, an intermediate thread hanger 120, a needle 130, a bobbin 140, a thread trimmer 150, and the like.

In addition, the thread take-up 110, the needle 130, the bobbin 140, the trimming device 150, etc. are provided with driving means 210, 230, 240, 250, such as a motor for driving them.

In addition, these driving means (210, 230, 240, 250) are automatically controlled by the control means (200).

Although the driving means 230 and 210 are provided in the present embodiment, the needle 130 and the thread take-up 110 and the like, but according to the embodiment, the needle 130 and the thread take-up are driven by one driving means. 110 may be configured to operate in conjunction.

In addition, the needle 130 is provided in the needle bar, the needle bar is driven by the drive means 230, and as a result, the needle 130 is driven up and down, but in this way, the intermediate configuration is a general configuration of the automatic sewing machine detailed description Is omitted.

In addition, there are a plurality of components in addition to the above components in the automatic sewing machine, these components are not so related to the features of the present invention will not be described separately.

Usually, the upper thread 20 crosses the bobbin thread supplied from the bobbin 140 through the bobbin 140 through the bobbin thread 110, the intermediate thread hanger 120, the needle 130, and the sewing material 10 from the thread take-up 110. It will form a sewn hole.

As such, the path through which the upper thread 20 passes from the thread taker 110 to the bobbin 140 is generally called an apostle.

The apostle of the upper thread 20 moves in a constant pattern despite the driving of the thread take-up 110, the needle 130, and the bobbin 140, and passes through a constant position.

Therefore, the image sensor 300 may be provided as an upper thread state monitoring means for monitoring a damaged state of the upper thread 20 passing through the apostle of the upper thread 20 between the thread taker 110 and the bobbin 140. The image of the upper thread 20 captured by the 300 is transmitted to the control means 200, and the control means 200 reads the image of the transmitted upper thread 20 to determine whether the upper thread 20 is abnormal. do.

The image sensor 300 may be applied as long as it monitors the upper thread damage state by image capturing, and any image sensor 300 may be regarded as a kind of the image sensor 300.

In addition, the image captured by the image sensor 300 may be a still image or a moving image that changes according to the movement of the upper thread 20.

In addition to the optical means, the upper thread condition monitoring means can be applied to anything that can monitor the upper thread damage.

In the present embodiment, it is assumed that the image sensor 300 is provided to photograph the damaged state of the upper thread 20 passing through the middle thread hanger 120.

However, according to the embodiment, the image sensor 300 may be provided anywhere to monitor the damage state of the upper thread 20 passing through the apostle of the upper thread 20 between the thread taker 110 and the bobbin 140. have. For example, the image sensor 300 may be provided between the upper part of the object to be sealed 10 and, in some cases, between the lower part of the object 10 and the bobbin 140.

Whether the upper thread 20 is abnormal, that is, whether the upper thread 20 is damaged may be determined by using a change in thickness of the upper thread 20 or by checking a lint phenomenon occurring in the upper thread 20. .

As such, when the control means 200 determines that there is an abnormality in the upper thread 20 based on the image of the upper thread 20 captured by the image sensor 300, the control means 200 causes the trimming device 150 to be driven. The trimming device driving means 250 is controlled, and the trimming device 150 cuts the upper thread 20 based on the trimming device driving means 250.

In this case, the trimmer 150 may cut both the upper thread 20 and the lower thread or only the upper thread 20.

When the upper thread 20 is cut by the trimmer 150 as described above, the damaged part of the upper thread 20 is trimmed in the state left in the upper thread 20. In other words, the damaged part of the upper thread 20 is not positioned in the sewing object 10 but is positioned at the end of the upper thread 20 hanging on the needle 130.

Meanwhile, the conventional thread trimming device is used to cut the sewing thread immediately before the sewing operation is completed or immediately before the sewing thread of a different color is supplied from the automatic sewing machine for embroidery, while continuing to use the same sewing thread as in this embodiment. There is no example of refusing to judge whether something is wrong.

In particular, in the case of an automatic sewing machine for embroidery having a plurality of sewing heads, the trimming device provided for each sewing head, all the trimming devices operate at the same time, and the trimming device does not operate at all.

After the driving of the trimming device 150, the sewing operation is automatically restarted, and the damaged part of the upper thread 20 is in the state where the end of the upper thread 20 is pulled down to the lower part of the object 10 by a predetermined length. Since the sewing operation is made, the end of the upper thread 20 is located in the lower portion of the to-be-sealed object 10 without forming a bark, and thus, in the sewing thread to be positioned below the to-be-sealed object 10 without forming a bark. The damaged part of the upper thread 20 is located. That is, after passing the damaged part of the upper thread 20, the upper thread 20 forms a bark.

Therefore, even if damage occurs in the upper thread 20, the automatic sewing machine automatically resumes the sewing work again after driving the trimming device 150, so that no interruption of work by single yarn occurs.

In addition, since the sewing thread having a damaged part is protruded to the lower part (back) of the to-be-sealed object 10 without forming a bark, the worker cuts and removes the sewing thread having the damaged part after sewing work is completed. Quality or embroidery quality can be improved. In addition, since the sewing thread having a damaged part is located on the back of the product, not the surface, even if the sewing thread having the damaged part is not removed, the quality of the embroidery product is not greatly affected.

In addition, according to the embodiment, after detecting whether the upper thread 20 is damaged, the automatic sewing machine stops working immediately after the trimming device 150 is driven, and the worker waits to remove the damaged part of the upper thread 20 directly. Could be However, in most automatic sewing machines, the removal of the damaged part of the upper thread by such a manual operation is unnecessary and undesirable.

On the other hand, as described above, in the case of the automatic sewing machine for embroidery, a plurality of sewing heads are arranged in a line, and it is common to use a form in which a plurality of needles are arranged in parallel for each sewing head.

In this case, in one sewing head, the upper thread is supplied with a different color to each needle, so that each needle has its own dead thread.

In the case of this type of automatic sewing machine for embroidery, the upper thread state monitoring means such as an image sensor can be provided for each apostle, but in this case, the manufacturing cost of the automatic sewing machine can be increased, and the interval between the needles Since it is very narrow, it is not easy to arrange an image sensor etc. along the narrow space | interval.

Therefore, only one image sensor for the upper thread state monitoring means is provided for one sewing head, and the image sensor is monitored so that the image sensor can be moved to a position capable of monitoring the apostle passing through any one of the plurality of needles. It is mounted on the moving part, it can be implemented so that the control means controls the monitoring means moving unit so that the monitoring means moving unit to position the image sensor to monitor the private road passing through the needle to be operated.

That is, the image sensor is provided in the sewing head while being mounted on the monitoring means moving unit, and the monitoring unit moving unit moves to an appropriate position under the control of the control unit so that the image sensor can monitor the apostle passing through the needle that is the target of operation. It can be located at.

In this way, even when a plurality of needles are provided in one sewing head, the image sensor may correspond to the image sensor, thereby making the manufacturing cost of the automatic sewing machine low.

In addition, in the automatic sewing machine of the type in which a plurality of sewing heads are provided in a line, a trimming device is generally provided for each sewing head, and each trimming device is generally operated simultaneously.

However, when the state of the upper thread is monitored by the image sensor according to the present invention, it is preferable that the trimmer of the corresponding sewing head is driven only for the sewing head in which the abnormality of the upper thread is found. That is, even when a plurality of sewing heads simultaneously perform a sewing operation, only one thread trimmer corresponding to a specific sewing head in which an abnormality of the upper thread is found is driven, and corresponding to the remaining sewing head in which the abnormality of the upper thread is not found. It is desirable to disable other trimming devices.

The above embodiments are merely preferred embodiments of the present invention, and the technical spirit of the present invention may be variously modified and implemented by those skilled in the art. Such modifications and adjustments fall within the scope of the present invention if they use the technical idea of the present invention.

The present invention can be applied to automatic sewing machines, to automatic sewing machines for embroidery.

1 is an overall front view of an automatic sewing machine for embroidery according to the prior art,

2 is an enlarged front view of the sewing head of FIG. 1;

3 is a partially broken side view of FIG. 2;

Figure 4 is a conceptual view of the main part of the automatic sewing machine of an embodiment according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10: sewing material 20: upper thread

110: thread take-up (cheonpyeong) 120: middle thread hanger

130: needle 140: drum

150: trimming device

Claims (4)

It comprises a thread take-up, a needle, a bobbin, a trimming device, comprising a driving means for driving the thread take-up, the needle, the bobbin, the thread trimming device, and a control means for controlling the driving means. In the automatic sewing machine: Upper thread state monitoring means for monitoring a damaged state of the upper thread passing through the apostle of the upper thread between the bobbin from the bobbin is provided, and the control means has an abnormality in the state of the upper thread monitored by the upper thread state monitoring means. If it is determined that the cutting machine is driven so that the upper thread is cut so that the automatic sewing machine. The method of claim 1, And said upper thread state monitoring means is an image sensor, and said control means determines whether said upper thread is abnormal based on an image of said upper thread captured by said image sensor. The method according to claim 1 or 2, The automatic sewing machine is an automatic sewing machine of a type in which a plurality of needles are arranged in parallel to a sewing head, and monitoring means for moving the upper thread state monitoring means on the sewing head to an apostle passing through any one of the plurality of needles. A moving part is provided, and the upper thread state monitoring means is mounted on the monitoring means moving part, and the control means is located in a position where the upper thread state monitoring means can monitor the slope passing through the needle that is the target of operation. Automatic sewing machine characterized in that the control. The method according to claim 1 or 2, The automatic sewing machine is a plurality of sewing heads are arranged in a line, each of the sewing head is a type of automatic sewing machine is provided with a corresponding trimming device, respectively, The upper thread state monitoring means is provided for each of the sewing heads, The control means controls so that only the thread trimming device corresponding to the sewing head in which the upper thread state monitoring means is determined to be driven is determined to be abnormal in the state of the upper thread, and the other that is not judged to be abnormal in the state of the upper thread. Automatic trimming machine, characterized in that for controlling the trimming device corresponding to the sewing head is not driven.

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