KR102165059B1 - High frequency sewing machine - Google Patents

Abstract

According to an embodiment of the present invention, a high frequency sewing machine comprises: a sewing machine body; an upper electrode which is connected to a head unit formed in one side of the sewing machine body; a processed material mounting plate which mounts a processed material to be slid; a lower electrode which is arranged to expose an upper surface in the processed material mounting plate; a frictional force providing member which protrudes from an upper part of the processed material mounting plate; and a high frequency oscillator which provides high frequency power to the upper electrode and the lower electrode. The present invention can maximize contact efficiency.

Description

High frequency sewing machine {HIGH FREQUENCY SEWING MACHINE}

The present invention relates to a high-frequency sewing machine, and more particularly, to allow the workpiece to be stretched during the bonding process of the workpiece and to adjust the area of the electrode in contact with the overlapping portion of the workpiece according to the width of the overlapping portion of the workpiece. It relates to a high-frequency sewing machine.

A high-frequency sewing machine is used that has a simple structure compared to general sewing sewing machines. The high-frequency sewing machine employs a method in which a high-frequency oscillator applies high-frequency power to a pair of electrodes, melts the workpiece itself by high-frequency dielectric heating, and bonds the overlapping portions of the workpiece.

The high-frequency sewing machine is made of cotton, wool, silk, etc., and the representative is natural fiber, or a fabric or fiber fabric of synthetic fiber represented by polyester, nylon, acrylic, etc., and the overlapping part of the overlapping end of this fiber fabric is high-frequency. It is mainly used in the case of processing clothes such as women's clothes, children's clothes, men's clothes, etc. by contacting (welding) through a thermoplastic resin tape that is melted by dielectric heating.

With a high-frequency sewing machine, the workpiece is sandwiched between a pair of upper and lower electrode rollers and continuously conveyed in a certain direction, while a high-frequency power is applied between the pair of electrode rollers to melt the workpiece itself by high-frequency dielectric heating and overlap the workpiece. A method of providing a means for bonding a portion has been disclosed. In this method, the contact portion of the pair of electrode rollers is in line contact with the width of the roller (point contact when viewed from the conveying direction of the workpiece), and in order to obtain reliable adhesive strength, the applied high-frequency power is set to a high value. There is a problem in that it is necessary to set or slow the feed rate of the workpiece.

Korean Patent Registration No. 10-1834284 is a mounting plate to solve these problems.

It is configured to intermittently transport the workpiece mounted on the top by the cooperative action of the feed tooth and the presser that synthesizes horizontally and vertically, and applies high-frequency power of a predetermined value between a pair of planar electrodes while the transport is stopped. In addition, a high-frequency sewing machine is disclosed that applies a smaller value of high-frequency power during a transfer operation than during a transfer stop.

However, Korean Patent Registration No. 10-1834284 says that the presser cannot press the workpiece during transfer, so the stretching effect of the workpiece during bonding is insignificant, and the power applied to the electrode during transport does not actively respond to the width of the workpiece. There was a limit to not being able to.

Korean Patent Registration No. 10-1834284 (2018.02.26)

The present invention relates to a high-frequency sewing machine, and more particularly, to allow the workpiece to be stretched during the bonding process of the workpiece and to adjust the area of the electrode in contact with the overlapping portion of the workpiece according to the width of the overlapping portion of the workpiece. It is an object of the present invention to provide a high-frequency sewing machine.

The problems of the present invention are not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

A high-frequency sewing machine according to an embodiment of the present invention for solving the above problems includes a sewing machine main body, an upper electrode connected to a head part formed on one side of the sewing machine main body, and a work piece mounted to allow the work material to be slidably mounted. A plate, a lower electrode disposed to expose an upper surface to the workpiece mounting plate, a friction force providing member disposed to protrude upward from the workpiece mounting plate, and providing high-frequency power to the upper electrode and the lower electrode It may include a high-frequency oscillator.

In addition, in the high-frequency sewing machine according to an embodiment of the present invention, the friction force providing member is connected to one side of the recess formed in the workpiece mounting plate through a pair of support arms, and the friction force providing member rotates the support arm. Alternatively, it may be accommodated in the recess through a linear movement or may be moved to protrude from a surface of the workpiece mounting plate by a predetermined distance.

In addition, the high-frequency sewing machine according to an embodiment of the present invention may further include a support arm driving unit that enables rotation or linear movement of the support arm electrically.

In addition, the high-frequency sewing machine according to an embodiment of the present invention may further include a driving motor in which the friction force providing member is composed of a roller member and rotates the roller in a direction opposite to a direction in which the workpiece moves.

In addition, the high-frequency sewing machine according to an embodiment of the present invention may further include an actuator module disposed inside the head part, and a pressing part connected to the actuator module and disposed under the head part and configured to move up and down. .

In addition, the upper electrode of the high-frequency sewing machine according to an embodiment of the present invention may be connected to the actuator module and disposed under the head to be configured to move up and down.

In addition, the upper electrode of the high-frequency sewing machine according to an embodiment of the present invention is composed of a plurality of upper electrode cells that are separated at predetermined intervals based on a direction perpendicular to a direction in which the workpiece moves, and the thickness of the workpiece Only the upper electrode cells located at a portion of the plurality of upper electrode cells corresponding to the material to be processed may be configured to be movable downward.

In addition, the roller of the high-frequency sewing machine according to an embodiment of the present invention is further provided with a friction force measuring sensor for measuring the friction force with respect to the workpiece, and the height of the roller is adjusted based on the friction force value measured by the friction force measuring sensor. It can be configured to be.

In addition, the head portion of the high-frequency sewing machine according to an embodiment of the present invention is provided with a motion sensor that detects whether the workpiece is located on the workpiece mounting plate, the workpiece is processed based on the measured value of the motion sensor. The high-frequency oscillator may be configured to generate high-frequency power when positioned on the workpiece mounting plate.

In addition, the high-frequency sewing machine according to an embodiment of the present invention further comprises a speed sensor for detecting a moving speed of the workpiece, and based on the moving speed of the workpiece measured by the speed sensor, the high frequency power of the high frequency oscillator is It can be configured to be able to control its size.

The high-frequency sewing machine according to an embodiment of the present invention uses a member that provides a frictional force that can protrude upward to stretch the material to be processed to provide an appropriate tension to prevent overlapping of the fabric during the bonding process. Contact efficiency can be maximized by making it close.

In addition, the high-frequency sewing machine according to an embodiment of the present invention can maximize the bonding processing efficiency by stretching the material to be processed by the cooperative action of the friction force providing member and the pressing unit that can protrude upward and being transferred flat in front of the electrode.

In addition, in the high-frequency sewing machine according to an embodiment of the present invention, the electrode is formed of a plurality of cells, and only the corresponding electrode cells are moved up and down during bonding according to the width of the overlapping portion of the material to be processed to maximize bonding processing efficiency. I can.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a perspective view of a high frequency sewing machine according to an embodiment of the present invention.
FIG. 2 is a view as viewed from the left side of a part of the state of the joining process of the workpiece by using the high-frequency sewing machine of FIG. 1.
FIG. 3 is a view as viewed from the front of the processing state of the workpiece in FIG. 2.
4 is a view as viewed from the front in the state of bonding of a workpiece with a narrow width of the overlapping portion.
5 is a schematic block diagram illustrating a control operation of a control unit of a high-frequency sewing machine according to an embodiment of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only these embodiments make the disclosure of the present invention complete, and are common knowledge in the art to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

Hereinafter, a high-frequency sewing machine according to embodiments of the present invention will be described with reference to the drawings.

1 is a perspective view of a high frequency sewing machine according to an embodiment of the present invention.

Referring to FIG. 1, a high-frequency sewing machine 1 according to an embodiment of the present invention includes a sewing machine main body 100, an upper electrode 160 connected to a head 120 formed on one side of the sewing machine main body 100, and A workpiece mounting plate 10 for slidably mounting a workpiece, a lower electrode 40 disposed to expose an upper surface to the workpiece mounting plate 10, and an upper portion of the workpiece mounting plate 10 It is configured to include a friction force providing member 20 disposed to be protruded.

High frequency power is provided to the upper electrode 160 and the lower electrode 40 by a high frequency oscillator 230 to be described later in FIG. 5.

The sewing machine main body 100 may be formed in the shape of a general sewing machine and may be mounted on the table 50. A pressing portion 140 and an upper electrode 160 are connected to a lower portion of the head portion 120 formed on one side of the sewing machine body 100.

The pressing unit 140 and the upper electrode 160 are connected to the actuator module 122 to be described later in FIGS. 2 and 3 and are configured to slide up and down so that they can selectively contact the material to be processed during bonding.

At this time, the material to be processed refers to a fiber fabric that is subjected to bonding processing, and the fiber fabric is folded in a folded state for bonding processing, and a film-type resin sheet to enable bonding by high-frequency heating is provided between the overlapped portions. Included.

On the upper surface of the table 50, a workpiece mounting plate 10 capable of sliding the workpiece is disposed. The workpiece mounting plate 10 may be mounted so as not to protrude from the top of the table 50, and the lower assembly 30 in which the lower electrode 40 is embedded is coupled and fixed, and the friction force providing member 20 is coupled and fixed. . The workpiece mounting plate 10 may be formed of a material having strong insulation, corrosion resistance, and abrasion resistance, and may be formed of, for example, engineering plastic.

The lower assembly 30 includes the lower electrode 40 and is configured to provide high frequency power to the lower electrode 40 during bonding. The lower assembly 30 may include a device for receiving high frequency power generated from the high frequency oscillator 230, and if necessary, a preheating device may be incorporated. To cope with this, a preheating device for preheating the upper electrode 160 may be built in the head 120 as well.

The lower electrode 40 coupled to and fixed to the lower assembly 30 may be disposed so that the upper surface thereof is exposed to the top of the table 50 by being coupled to the upper portion of the lower assembly 30. The upper exposed surface of the lower electrode 40 is It may be substantially parallel to the plane of the table 50 or may protrude from the top surface of the table 50 to a very fine height.

In FIG. 1, the upper surface of the lower electrode 40 is shown as a square-shaped surface, but this is only an example, and various modifications such as a circle and a rhombus may be possible.

The position of the lower electrode 40 may be determined to correspond to the position of the upper electrode 160 disposed thereon.

When the pressing part 40 descends, it may be configured to contact the material to be processed located on the upper surface of the lower electrode 40, and when the pressing part 40 descends, the blood located on the upper surface of the lower electrode 40 It may be configured to be able to contact the area immediately before it without contacting the processed material.

A friction force providing member 20 for stretching the material to be processed is provided before the material to be processed contacts the pressing portion 140, the upper electrode 160 and the lower electrode 40.

The friction force providing member 20 is configured to protrude upward from the workpiece mounting plate 10 and serves to impart a constant friction force to the workpiece. The frictional force providing member 20 may be various types of embodiments as long as it imparts a constant frictional force to the material to be processed, but in the present invention, a roller member will be described as an example. For convenience of explanation, the friction force providing member 20 is replaced with a roller 20 and described below.

The roller 20 is coupled and fixed to one side of the recess 52 formed in the table 50 by a pair of support arms 22a and 22b. At this time, strictly speaking, since the roller 20 is configured in the workpiece mounting plate 10, the recess 52 may also be formed in the workpiece mounting plate.

Depending on the embodiment, since the workpiece mounting plate 10 may be a separate configuration or a subordinate configuration of the table 50, it may be treated as a substantially the same configuration.

The recess 52 is formed in a concave groove shape, and a pair of support arms 22a and 22b are connected to both sides of the roller 20 and one side of the recess 52. The roller 20 may be pivotally coupled to one side of the recess 52 by a pair of support arms 22a and 22b.

Due to such a pivot-type coupling structure, the roller 20 may be completely accommodated in the recess 52 so as not to protrude upward or may be disposed to protrude to the top of the table 50 by a predetermined distance.

At this time, the structure of the pair of support arms 22a and 22b that allows the height of the roller 20 to be moved up and down is only an embodiment, and the pair of support arms 22a and 22b are separate such as actuator modules. Other embodiments that can be moved up and down by linear movement or the like may be possible by the member of.

Further, the roller 20 may be configured to be rotatable by a drive motor 210 to be described later in FIG. 5. At this time, the driving motor 210 may be disposed inside the workpiece mounting plate 10, and the driving connection may be configured to be disposed on a pair of support arms 22a and 22b.

The table 50 may be supported by a pair of legs 70, and the legs 70 may be configured to be adjustable in height manually or electrically.

The sewing machine main body 100 may be provided with an operation button 130 so that power is turned on and off according to an operation of the operator pressing the operation button 130.

Although not shown in FIG. 1, when the volume of other components such as the high frequency oscillator 230 is large, a separate module may be formed, and the modules may be disposed to be coupled to the lower surface of the table 50.

FIG. 2 is a view as viewed from the left side of a part of the bonding process state of the workpiece by using the high-frequency sewing machine of FIG. 1, FIG. 3 is a view as viewed from the front of the workpiece bonding process state of FIG. 2, and FIG. It is a view as viewed from the front of the state of the joint processing of the workpiece with a narrow width.

With reference to FIGS. 2 to 4, a method of bonding and processing a workpiece by the high-frequency sewing machine 1 according to the present invention will be described.

Referring to FIG. 2, it is shown that the material to be processed 3 disposed in an area where the resin film 5 is overlapped moves from left to right from the top of the material mounting plate 10 of the table 50.

The material to be processed first comes into contact with the roller 20, and the roller 20 rotates in a direction opposite to the moving direction of the material to provide friction. At this time, the roller 20 is configured to be rotated by the drive motor 210 as described above.

The high-frequency sewing machine 1 according to the present invention includes a control unit 200 as described later in FIG. 5, and the control unit 200 is configured to control the operation of each component according to signals from each sensor.

The roller 20 may be provided with a sensor that measures the friction force with the roller 20 during the movement of the workpiece 3, and the controller 200 receives the signal value measured by the friction force measurement sensor, and the controller 200 It is possible to control the rotation speed of the roller or adjust the height of the upper protrusion of the roller (20).

For example, when the frictional force value is greater than a preset reference value, bonding processing efficiency may be lowered, so the controller 200 may decrease the rotational speed of the roller 20 or lower the height of the roller 20.

Conversely, when the frictional force is less than a preset reference value, the controller 200 may increase the rotation speed of the roller 20 or increase the height of the roller 20.

When the speed and height of the roller 20 are adjusted in this way to provide an appropriate frictional force, a certain level of tension is provided to the workpiece during bonding, thereby increasing work efficiency.

However, since the roller 20 may protrude from the top of the table 50, if the material to be processed moves between the upper electrode 160 and the lower electrode 40 in an inclined form, the bonding surface may not be uniformly heated. Therefore, an additional configuration is required to allow the workpiece to enter horizontally before contacting the two electrodes.

The high-frequency sewing machine 1 according to the present invention is provided with a pressing part 140 so that the material to be processed is flat. The pressing part 140 is connected to the actuator module 122 through the actuator bar 145. The actuator module 122 adjusts the actuator bar 145 according to the control signal from the control unit 200 so that the pressing unit 140 can move up and down.

At this time, the pressing unit 140, the actuator bar 145, or the actuator module 122 is provided with a pressure sensor or a friction force measurement sensor so that the control unit 200 applies a preset pressure or friction force to the workpiece. It can be configured to adjust the height of the.

Accordingly, when the material to be processed is moved from side to side, it is stretched by the roller 20 to give a certain tension, and is disposed horizontally before the upper electrode 160 and the lower electrode 40 enter by the pressing part 140.

The upper electrode 160 is connected to the actuator module 122 through an actuator bar 165. The actuator module 122 adjusts the actuator bar 165 according to the control signal of the controller 200 so that the upper electrode 160 can move up and down.

At this time, the upper electrode 165, the actuator bar 165, or the actuator module 122 is provided with a pressure sensor or a friction force sensor so that the control unit 200 applies a preset pressure or friction force to the workpiece. It can be configured to adjust the height of the.

Referring to FIGS. 1 and 3, the upper electrode 160 may include a plurality of electrode cells separated at predetermined intervals based on a direction perpendicular to a direction in which the workpiece moves, and a direction perpendicular to the direction in which the workpiece moves.

Specifically, the upper electrode 160 is composed of four electrode cells 160a, 160b, 160c, and 160d, and is connected to the actuator module 122 by actuator bars 165a, 165b, 165c, and 165d, respectively.

Referring to FIGS. 3 and 4, it can be seen that all or some of the electrode cells of the upper electrode 160 contact the material to be processed according to the width of the overlapping portion of the material to be processed.

In FIG. 3, the width of the overlapping portion of the material to be processed is a general case, and since the width of the overlapping portion corresponds to the width of the upper electrode 160 and the lower electrode 40, four electrode cells 160a, 160b, 160c of the upper electrode 160, 160d) Everyone is in contact with the workpiece and provides heat by high-frequency power.

The bonding process is performed while the numerical film 5 disposed on the overlapping portion of the workpiece 3 is melted by heat generated from the upper electrode 160 and the lower electrode 40.

In FIG. 4, compared to FIG. 3, the width of the overlapping portion of the material to be processed 3 is relatively narrow. Therefore, according to the control signal of the control unit 200, the actuator module 122 adjusts the two actuator bars 165b and 165c to lower the two upper electrode cells 160b and 160c to contact the workpiece.

Accordingly, only the upper electrode 160 corresponding to the width of the overlapped portion of the workpiece 3 is brought into contact with the upper portion of the workpiece 3, thereby maximizing the bonding processing efficiency by applying appropriate heat to an appropriate region.

In this case, although FIG. 4 shows that only the upper electrode 160 is formed of a plurality of cells, the lower electrode 40 may also be configured to operate only the electrode cells at a position corresponding to the upper electrode 160 operating by being composed of a plurality of cells. There will be.

In this case, the method of determining the cell of the upper electrode 160 to be operated by the control unit 200 may be selected from a method of manually inputting by an operator or a method of automatically performing using a sensor.

In the automatic mode by the sensor, for example, when the actuator module 122 lowers the cells of the plurality of upper electrodes 160, the descending length is detected, and the cells with the short descending length are operated by maintaining contact, and the falling length is relatively Cells that become elongated can use a method of stopping strategy application and returning to their original position.

However, the above example is only an embodiment, and the sensor determines the cell of the upper electrode 160 to be operated using various sensor values such as a pressure sensor, a position detection sensor (infrared sensor, etc.), and a distance sensor (ultrasonic sensor, etc.). I will be able to.

When a cell of the upper electrode 160 to be operated is determined by the above various methods, a method of operating the cell with the lower electrode 40 corresponding to the cell of the determined upper electrode 160 may be used.

5 is a schematic block diagram illustrating a control operation of a control unit of a high-frequency sewing machine according to an embodiment of the present invention.

Referring to Figure 5, the high-frequency sewing machine 1 according to an embodiment of the present invention may be configured to include a control unit 200, a drive motor 210, an actuator module 122, and a high-frequency oscillator 230. have.

The control unit 200 may be configured in the sewing machine body 100 or may be disposed in a separate module. The control unit 200 is connected to the drive motor 210 to transmit and receive a control signal, etc., and rotates the roller 20 in a direction opposite to the transfer direction of the workpiece by the above-described algorithm.

The controller 200 is connected to the actuator module 122 to transmit and receive a control signal or the like. The controller 200 may control the actuator module 122 to increase or decrease the height of the pressing unit 140 and the upper electrode 160.

The controller 200 is connected to the high frequency oscillator 230 to transmit and receive a control signal or the like. The controller 200 controls the operation of the high frequency oscillator 230 to provide high frequency power to the upper electrode 160 and the lower electrode 40 to heat the electrode.

The upper electrode 160 may be a negative electrode, and the lower electrode 40 may be a positive electrode. However, this is only an example and may be disposed as an opposite electrode.

The high frequency sewing machine according to the present invention has been described above. In the embodiment of the present invention, the case where the upper electrode 160 and the lower electrode 40 are planar electrodes is described as an example, but at least one of the upper electrode 160 and the lower electrode 40 is changed to a roller type electrode. It could be. Even in this case, stretching and leveling of the workpiece may be maximized by the combination of the frictional force providing member 20 and the pressing unit 140.

Those of ordinary skill in the art to which the present invention pertains will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

1: high-frequency sewing machine 3: workpiece
5: resin film 10: plate to be processed
20: roller 22a, 22b: support arm
30: lower assembly 40: lower electrode
50: table 52: recess
70: leg portion 100: sewing machine body
120: head part 122: actuator module
130: power button 140: pusher
145: actuator bar 160: upper electrode
165: actuator bar 200: control unit
210: drive motor 230: high frequency oscillator

Claims (10)

Sewing machine body;
An upper electrode connected to a head formed on one side of the sewing machine body;
A workpiece mounting plate for slidingly mounting the workpiece;
A lower electrode disposed to expose an upper surface to the workpiece mounting plate;
A frictional force providing member disposed to protrude upward from the workpiece mounting plate; And
Including a high-frequency oscillator for providing high-frequency power to the upper electrode and the lower electrode,
The friction force providing member is connected to one side of a recess formed in the workpiece mounting plate through a pair of support arms,
The friction force providing member is accommodated in the recess through rotation or linear movement of the support arm or moves to protrude from the surface of the workpiece mounting plate by a predetermined distance,
The friction force providing member is a roller,
A high-frequency sewing machine comprising a drive motor that rotates the roller in a direction opposite to a direction in which the material to be processed moves. delete The method of claim 1,
A high-frequency sewing machine further comprising a support arm driving unit that enables the rotation or linear movement of the support arm by electric power. delete The method of claim 1,
An actuator module disposed inside the head portion; And
A high-frequency sewing machine further comprising a pressing portion connected to the actuator module and disposed under the head portion and configured to move up and down. The method of claim 5,
The upper electrode is connected to the actuator module, the high-frequency sewing machine configured to be disposed under the head to move up and down. The method of claim 6,
The upper electrode is composed of a plurality of upper electrode cells separated by a predetermined interval based on a direction perpendicular to a direction in which the workpiece moves,
A high-frequency sewing machine capable of moving downwardly only the upper electrode cell located at a portion of the plurality of upper electrode cells corresponding to the material to be processed so as to correspond to the thickness of the material to be processed. The method of claim 7,
The roller is further provided with a friction force measurement sensor for measuring a friction force with respect to the workpiece,
The roller is a high-frequency sewing machine configured to adjust the height based on the friction force value measured by the friction force measurement sensor. The method of claim 8,
The head portion is provided with a motion sensor for detecting whether the workpiece is located on the workpiece mounting plate,
A high-frequency sewing machine in which the high-frequency oscillator generates high-frequency power when the workpiece is positioned on the workpiece mounting plate based on the measured value of the motion sensor. The method of claim 8,
Further comprising a speed sensor for detecting the moving speed of the workpiece,
A high-frequency sewing machine that controls the magnitude of the high-frequency power of the high-frequency oscillator based on the moving speed of the workpiece measured by the speed sensor.

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