KR101331063B1 - Method and apparatus of automatic controlling thread tension for stitching button hole on sewing machine - Google Patents

Abstract

The present invention relates to a thread tension automatic adjustment device and method for sewing a buttonhole of a sewing machine, and more particularly to a thread tension adjusting device for a sewing machine for sewing a buttonhole, by inputting the running speed of the sewing machine and the conditions of the fabric and thread as parameters; A panel unit for inputting a control signal for fine-adjusting the applied yarn tension and the reaction speed of the actuator; A control unit for adjusting and stitching the thread tension for each section of the buttonhole with the value retrieved by the information input by the panel unit, and recording and managing the finely adjusted thread tension and the actuator reaction speed; A table unit which records in advance a thread tension adjustment value for each section of buttonhole locks divided by parameters under the control of a control unit, searches for a preset parameter condition, and records finely adjusted values; A tension unit for adjusting the tension of the thread for each section of the button hole by an actuator under the control of a controller; And a sewing unit for stitching a buttonhole at a running speed set by the control of the controller. Characterized in that the configuration is included, and set the conditions of the fabric and yarn input as a parameter has the effect of automatically adjusting the tension of each section of the buttonhole thread.

Sewing machine, buttonhole, lockstitch, bartacking, thread tension

Description

METHOD AND APPARATUS OF AUTOMATIC CONTROLLING THREAD TENSION FOR STITCHING BUTTON HOLE ON SEWING MACHINE}

1 is a structural diagram of a typical buttonhole;

Fig. 2 is a diagram illustrating a lock in the buttonhole according to the first example;

3 is a diagram illustrating a lock in the buttonhole according to the second example;

4 is a functional configuration of the thread tension automatic adjustment device for the buttonhole stitching of the sewing machine according to the present invention,

5 is a front view of a panel unit according to an embodiment of the present invention;

6 is a flowchart illustrating a method for automatically adjusting thread tension for buttonhole stitching of a sewing machine according to the present invention;

          DESCRIPTION OF REFERENCE NUMERALS

100 panel portion 102 fine adjustment key portion

104: control key section 106: function key section

108: display unit 110: control unit

120: table portion 130: tension portion

140: sewing section

The present invention is to automatically apply the tension of the thread to be applied differently for each section in sewing the buttonhole with a sewing machine, in particular, to automatically adjust the tension of the thread so that the optimal buttonhole is sewn by the type of thread and fabric used The present invention relates to a thread tension automatic adjusting device and method for sewing a buttonhole of a sewing machine.

In general, clothes or clothes should be convenient for people to wear and take off, and there is a method of fixing a state of clothes uniformly using a string or a band, a method of using a slide fastener, and a method of using a button.

The buttons are used in almost all current clothes because they can be well-dressed and relatively easy to use.BUTTON HOLE is a button hole for sewing buttons or fixing them at the same time. need.

A buttonhole is formed by cutting a sheath into a fabric. The buttonhole is used many times a day for clothes and clothes or for a specific purpose. As a result, the buttonhole becomes loose, worn out, worn out and the buttons cannot be fixed. It can't perform and shorten the life of the clothes.

In order to prolong the life of such buttonholes, the wisdom of stitching or stitching the outer periphery of the buttonholes tightly with threads is learned, and the stitching is sewn around the buttonholes with a sewing machine to mass produce clothes. It is common to sew in the form of ZIGZAG.

Referring to FIG. 1, a structure of a general button hole will be described. The button hole 10 includes a bar-taking part 20; Left parallel 40; Right parallel portion 40; Bottom bar tagging unit 50; It consists of a sheath (HOLE) part (60).

Sheath 60 is formed by cutting a hole (HOLE) through which the button is sewn with a knife, the length is determined according to the button used, and the right parallel with the upper bartacking portion 20 and the left parallel portion 40 The part 40 and the bottom bartacking part 50 are sewn around the sheath part 60 so that the fabric does not loosen the warp and weft yarns, and at the same time, the size of the sheath part is not changed and is firmly used for a long time. . In addition, the left parallel portion 30 has a left sheath space portion 70 between the sheath portion 60, and the right parallel portion 40 has a right sheath space portion 80 between the sheath portion 60. It is provided to extend the life of the sewn buttonhole (10).

FIG. 2 is a diagram for explaining the stitching of the buttonhole according to the first example, and FIG. 3 is a diagram for explaining the stitching of the buttonhole according to the second example.

2, the upper bartacking part 20, the left parallel part 40, the right parallel part 40, and the lower bartacking part 50 have a left and right direction for each section. ZIGZAG stitching is continuous, and the upper bartacking portion 20 and the lower bartacking portion 50 are different in the stitching density between the left parallel portion 40 and the right parallel portion 40.

Referring to the second stitching example shown in FIG. 3 in detail, in the section of the left parallel portion 40 and the right parallel portion 40 is a zigzag stitching that continues in the left and right directions, and the upper bartacking portion 20 and the lower bartacking. In the section of the part 50, the zigzag stitches are continued in the vertical direction, and the upper bar tagging part 20 and the lower bar tagging part 50 differ in the sewn density of the left parallel part 40 and the right parallel part 40. do.

In general, the lockable density of the left parallel portion 40 and the right parallel portion 40 is low, the lockable density of the upper bartacking portion 20 and the lower bartacking portion 50 is high, and the buttonhole 10 Depending on the pattern, unless otherwise specified, the left parallel portion 40 and the right parallel portion, including the upper bartacking portion 20 and the lower bartacking portion 50, as shown in the attached first stitching example of FIG. 2. In the whole section of 40), zigzag stitching is performed in a horizontal direction.

The pattern PATTERN of the button hole 10 includes a rectangular button hole type, an EYE-LET type with one end formed in a circle, and the like.

The button hole 10 cuts the sheath portion 60 at the time when the stitching for each section of the upper bartacking portion 20, the left parallel portion 40, the right parallel portion 40, and the lower bartacking portion 50 is completed. Since it is formed, so as not to shake the periphery of the sheath portion 60 while the lockstitch is in progress, so as not to skip the lockstitch, it should be sewn to a certain density. Density adjustment of the lockstitch is directly affected by the running speed and the tension of the sewing machine or electric sewing machine.

In each section of the buttonhole, if the sewning density is too high, excessive swelling is formed, resulting in poorly sewn appearance and deterioration of product quality and price, while the needle (NEEDLE) is sewn into the densely packed area. Break the stitched thread. In particular, tension control of the yarn is a very important factor in determining the stitching result.

In the stitching method according to the prior art, a skilled worker manually adjusts or selects the sewing speed and the tension of each section according to the thickness of the thread and the fabric.

In particular, in the case of high-speed electric sewing machine, by checking the thickness of the fabric and the thickness of the thread according to the old experience, the upper bartacking portion 20 and the left parallel portion 40 and the right parallel portion 40 and the lower bartacking portion 50 The tension of the yarn was randomly sewn for each section of).

Therefore, the result of the product is inconsistent, the productivity is lowered and the cost is increased due to labor costs, because it depends on the skill of the operator to sew the buttonhole. have.

The present invention is to input the conditions including the type and the running speed of the fabric and yarn in the electric sewing machine as a parameter so that the sewn quality of each section of the button hole is automatically optimized, in particular the table by the parameters that are standardized and input It is an object of the present invention to provide an apparatus and method for automatically adjusting thread tension for buttonhole stitching in a sewing machine to search for optimal stitching information for each section and to adjust thread tension.

In order to achieve the above object, the present invention, in the thread tension adjusting device of the sewing machine to sew a buttonhole, inputs the running speed of the sewing machine and parameter information for each type of fabric and thread to set the conditions and applied A panel unit for inputting a control signal for finely adjusting the tension and the reaction speed of the actuator; A control unit for adjusting and stitching the thread tension for each section of the buttonhole with the value retrieved by the information input by the panel unit, and recording and managing the finely adjusted thread tension and the actuator reaction speed; A table unit which records in advance a thread tension adjustment value for each section of buttonhole locks divided by parameters under the control of a control unit, searches for a preset parameter condition, and records finely adjusted values; A tension unit for adjusting the tension of the thread for each section of the button hole by an actuator under the control of a controller; And a sewing unit for stitching a buttonhole at a running speed set by the control of the controller. Is presented.

In addition, the present invention devised to achieve the above object, in the method of adjusting the thread tension of the sewing machine to sew a buttonhole, by inputting the operating speed and parameters for each type of fabric and thread by the control unit of the sewing machine for operation Setting as conditions; If the buttonhole is sewn with a sewing machine, searching for and checking a thread tension adjustment value with a parameter of a set operating condition, and sewing a buttonhole with a controlled thread tension; And a fine correction process of fine correction and recording management using the fine adjustment key of the panel unit when finely adjusting the thread tension of the buttonhole lock and the reaction speed of the actuator; Is presented.

Hereinafter, according to the present invention of the configuration as described above, with reference to the accompanying drawings, an automatic adjustment device and method for thread tension lock button sewing machine sewing machine will be described in detail.

It is attached to explain the present invention, Figure 4 is a functional configuration of the thread tension automatic adjustment device for buttonhole stitching of the sewing machine according to the present invention, Figure 5 is a front view of the panel unit according to an embodiment of the present invention, Figure 6 Is a flowchart of a method for automatically adjusting thread tension for buttonhole stitching of a sewing machine according to the present invention.

In describing an example of the present invention, since illustration and description of a well-known technical content which is not directly related to the present invention are omitted, the present invention is clearly conveyed without blurring the gist of the present invention.

Referring to Figure 4, when explaining the thread tension automatic adjustment device for buttonhole stitching of the sewing machine according to an embodiment of the present invention, the panel unit 100 for inputting a control signal and a fine adjustment signal; A controller 110 for controlling buttonhole punching and managing fine adjustment conditions; A table unit 120 for recording a thread tension adjustment value divided by a parameter; A tension unit 130 for adjusting the tension of the thread with an actuator; Sewing unit 140 to sew the button hole; This configuration is included.

4, 5 and 1 will be described in detail with the thread tension automatic adjustment device for buttonhole stitching of the sewing machine according to the present invention, the kind and thickness of the fabric in the table 120 in advance And the parameters for determining the RPM (RATE PER MINUTE) by the thickness and the rotational speed of the motor that provides power to operate the sewing machine, etc. as standard parameters. , The thread tension adjustment value for each section for the stitching of the left parallel part 30, the upper bar tagging part 20, the right parallel part 40, and the lower bar tagging part 50 is recorded in a table. And manage. The thread tension adjustment value recorded as a table in the table 120 is a result of repeated experiments and know-how (KNOW-HOW) for a long time by a skilled worker. In addition, the thread tension adjustment value recorded as a table in the table 120 is an average value, and each sewing machine may have a slight assembly and adjustment error, etc. in the manufacturing production process, so that fine correction can be made by the production worker in the field do.

The tension unit 130 is to maintain a constant tension (TENSION) of the thread because the control unit 110 controls the supply speed of the thread for sewing the buttonhole in accordance with a control signal retrieved from the table unit 120, As the actuator controlling the tension of the thread, the tension of the thread is adjusted using one of a motor, a solenoid valve, an air cylinder, and the like. In the present invention, the description will be made using a motor. In addition, even in the case of actuators, there is a slight difference in the reaction speed due to functional errors generated in production and assembly, etc., so it is necessary to make fine corrections in the field and to record and manage the corrected values.

If the tension of the thread is too weak in the sewing machine, a large amount of thread is supplied at a time, and the result of the sewing is swelled or spoiled.The thread tension is too strong. It becomes a problem.

There are many kinds of fabrics that are sewn with sewing machines such as silk, cotton and artificial fibers of natural fibers, and the conditions of stitching are different because the thickness of the fabric varies depending on the characteristics and uses of the fabrics. The kind and conditions of using a fiber etc. will differ. In the case of sewing machines, the tension of the thread must be adjusted for each operating speed according to the operating speed, that is, the RPM of the power source or the rotational speed of the power shaft. As such, the conditions of the fabric, yarn, and running speed used for the stitching are selected and inputted as standardized parameters. Since the table 120 is searched using these parameters, an optimal thread tension value for each section of the buttonhole is searched. The table 120 is recorded by a skilled worker, and records the optimal actual tension value for each condition according to each parameter in a table. Therefore, even in the case of an inexperienced worker, for example, the type of the fabric, the type of yarn and the running speed displayed on the display unit 108 using the function key unit 106 and the control key unit 104 of the panel unit 100 are standardized. Selected parameters are produced by sewn buttonholes.

Since the stitching of the buttonhole is generally higher than the stitching of the left parallel portion 30 and the right parallel portion 40, the stitching density of the upper bartacking portion 20 and the lower bartacking portion 50 is higher, so that the tension of the thread is different. Should apply.

In general, the sewn in each section of the button hole proceeds in the order of the left parallel portion 30-> upper bar tagging portion 20-> right parallel portion 40-> lower bar tagging portion 50, each section is In each case, the tension of the thread must be adjusted to vary the density of the stitches.

That is, when the operator inputs standardized parameters such as the type, thickness, type of thread, and thickness of the fabric to sew the buttonhole through the panel unit 100, the control unit 110 receives the sectioned yarn from the table unit 120. Check the tension adjustment value of the tension control unit 130 and the sewing unit 140 to start the lockstitch. At this time, if it is determined that the operator needs to correct the thread tension while checking the state of the buttonhole to be sewn, the operator controls the fine adjustment key 102 of the panel unit 100 to finely adjust or decrease the tension of the thread. In this way, the result of the correction process and the information on the current sewing section of the button hole is displayed on the display unit 108 and visually confirmed, and the actual tension value corrected in the optimal state is recorded in the allocated area of the table unit 120. If the same condition is used later, it should be used as an option item.

Therefore, using the present invention of such a configuration, an inexperienced worker produces a refined buttonhole by inputting the conditions for each type of fabric and yarn as standardized parameters.

Referring to Figure 6, when explaining the thread tension automatic adjustment method for buttonhole stitching of the sewing machine according to an embodiment of the present invention, the process of setting the operating parameters; The process of punching buttonholes; Fine calibration, recording and management; .

The controller of the sewing machine sets and inputs the driving speed condition according to the RPM of the sewing machine as a parameter through the panel unit (S100), and inputs and records the conditions such as the type and thickness of the fabric to produce the buttonhole (S110). And input and record conditions such as thread type and thickness (S120), and check whether a control signal for starting buttonhole punching is input through the panel unit (S130).

If it is confirmed that the control signal for starting the buttonhole stitching is input, the controller searches the table by the operating speed of the sewing machine, the type and thickness of the fabric, the type and thickness of the thread, and the buttonhole. Check the recorded thread tension value to produce (S140), and control the tension per section of the buttonhole with the confirmed tension value of the button proceeds to sew the buttonhole (S150).

When it is confirmed by the control unit that a control command for correcting the thread tension is input from the panel unit (S160), the thread tension is finely adjusted, and the adjusted thread tension value is recorded and managed in the allocated area of the table unit. At this time, even when it is necessary to correct the reaction speed of the actuator for adjusting the tension of the thread, the actuator is selected through the panel unit and the reaction speed is finely adjusted, and the adjusted reaction speed value is recorded and managed in the allocated area of the table part. (S170). The fine adjustment values that are corrected and recorded and managed in the table portion can be selectively used in the work performed in the following order by the operator.

Therefore, the present invention having such a configuration selects and inputs a formalized parameter according to the type of fabric and yarn by an unskilled worker, and thus has the advantage of producing buttonholes of the same quality as that of a skilled worker.

It is to be understood that the present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

The present invention having the above-described configuration has an industrial use effect of automatically adjusting the tension of each section of the buttonhole with a parameter input indicating the type of fabric and thread in producing the buttonhole.

In addition, there is a convenient effect in use to mass-produce buttonholes with the same quality as those produced by skilled workers by low production cost and high productivity.

Claims (7)

In the thread tension adjusting device of the sewing machine to sew a buttonhole, A panel unit for inputting control signals for setting conditions by inputting the running speed of the sewing machine and parameter information for each type of fabric and thread, and finely adjusting the thread tension applied and the reaction speed of the actuator; A control unit for adjusting and stitching the thread tension for each section of the buttonhole with the value retrieved by the information input by the panel unit, and recording and managing the finely adjusted thread tension and the actuator reaction speed; A table unit which records in advance a thread tension adjustment value for each section of buttonhole locks divided by parameters under the control of the controller, searches for the preset parameter condition, and records the finely adjusted value; A tension unit for adjusting the tension of the thread for each section of the button hole by an actuator under the control of the controller; And A sewing unit for stitching a buttonhole at a running speed set by the control of the controller; Thread tension automatic adjustment device for the buttonhole lock of the sewing machine is configured to include. The method of claim 1, wherein the tension unit, Actuator for adjusting the tension of the thread, the thread tension automatic adjustment device for sewing button button sewing machine, characterized in that one of the motor, solenoid, air cylinder is included. The method of claim 1, wherein the panel unit, Fine adjustment key for finely adjusting the tension of the thread to adjust the tension portion and the reaction speed of the actuator; A control key unit for selecting and inputting operating conditions for sewing the buttonhole of the sewing machine; A function key unit for selectively controlling the operation of the sewing machine; And A display unit which displays information on an operating state and a control state of the sewing machine; Thread tension automatic adjustment device for the buttonhole stitching of a sewing machine comprising a. In the thread tension adjustment method of the sewing machine to sew a buttonhole, Inputting, by the controller of the sewing machine, a parameter for each type of running speed and type of fabric and thread, and setting it as a condition for operation; If the buttonhole is sewn with the sewing machine, searching for and checking a thread tension adjustment value with a parameter of a set operating condition, and sewing a buttonhole with a controlled thread tension; And A fine correction process of fine correction and recording management using a fine adjustment key of the panel unit when finely adjusting the thread tension of the buttonhole lock and the reaction speed of the actuator; Automatic adjustment of thread tension for buttonhole stitching of the sewing machine included. The method of claim 4, wherein the setting process comprises: Inputting and recording and setting the running speed which is sewn from the panel unit by the controller of the sewing machine as a parameter; Inputting, recording, and setting a condition including a type and a thickness of a fabric for sewing a buttonhole from the panel by the controller as a parameter; And Inputting, recording, and setting a condition including a type and a thickness of a thread to sew a buttonhole from the panel by the controller as a parameter; Automatic thread tension adjustment method for the buttonhole stitching of a sewing machine comprising a. The method of claim 4, wherein the lockstling process, Confirming, by the control unit, a control command for punching a buttonhole from the panel unit is input; Searching for a table unit when the lockstitch control command is input and checking a real tension adjustment value with a parameter of a set condition; And Sewn by controlling the thread tension for each section of the button hole with the checked thread tension adjustment value; Automatic thread tension adjustment method for the buttonhole stitching of a sewing machine comprising a. The method of claim 4, wherein the fine correction process, Checking whether a control command for finely correcting a thread tension sewn from the panel unit is input by the controller; And When the fine adjustment control command is input, finely correcting, recording, and managing a real tension and a reaction speed of an actuator; Automatic thread tension adjustment method for the buttonhole stitching of a sewing machine comprising a.

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