KR102504311B1 - Device and method for stitching - Google Patents

Abstract

The present invention provides a backstitch device and method. An aspect of a backstitch device according to an embodiment of the present invention includes a detection unit for detecting a position value of an edge of a support plate on which a mat is supported; a stitching unit including a needle that moves up and down to stitch the rim member along the rim of the mat transported by the roller; a transport unit intermittently and linearly transporting the mat supported on the upper surface of the support plate in a state in which the needle moves up and down and is separated from the mat; a roller for rotating the mat supported on the upper surface of the support plate in a state in which the needle descends and is inserted into the mat; a tension control unit for adjusting the tension of the thread supplied to the backstitching unit for backstitching of the rim member; and determining the edge shape of the mat according to the position value of the edge of the mat detected by the detection unit, and controlling the operation of the roller and the backstitch unit so that the edge member is sewn to the edge of the mat while the mat is transported. a control unit controlling an operation of the tension adjusting unit so that the tension of the thread supplied to the backstitch unit is adjusted according to the shape of the edge of the mat; wherein the control unit determines the edge shape of the mat as either a straight section or a curved section according to the position value of the edge of the mat detected by the detection unit, and the needle is inserted into the mat. The transfer such that the displacement of the mat with respect to the needle while moving up and down once in the state is increased when the edge shape of the mat is determined to be a curved section compared to when the edge shape of the mat is determined to be a straight section. Controls the operation of the unit and the roller, and reduces the tension of the thread supplied to the backstitch unit when the edge shape of the mat is determined to be a curved section compared to when the edge shape of the mat is determined to be a straight section. Controls the operation of the control unit.

Description

Backstitch device and method {DEVICE AND METHOD FOR STITCHING}

The present invention relates to a backstitch apparatus and method.

In general, in the case of a mat installed to prevent contamination of the floor, etc., it is manufactured according to the shape of the floor surface. Therefore, the edge of the mat is formed in various shapes, and the edge member supplied for the finish is stitched to the edge of the mat. Recently, in order to automatically sew an edge member to the edge of a mat, the transfer direction of the mat must be switched according to the shape of the edge to perform the stitching.

Substantially, the rim member is sewn into the mat by raising and lowering the threaded needle at a predetermined time interval. At this time, a stitch interval is set according to the distance the mat moves with respect to the needle during the time the needle moves up and down. However, the same displacement per time when the edge shape of the mat is straight or curved may be different depending on the transport method of the mat. That is, when the edge shape of the mat is a curved section compared to a straight section, the displacement relative to the needle will be relatively increased. Therefore, when the edge shape of the mat is determined to be a curved section, the stitch interval is relatively increased compared to the case of a straight section.

On the other hand, in order to secure the quality of the backstitch, a certain tension is applied to the thread. However, as described above, since the stitch spacing varies depending on whether the shape of the mat is a straight section or a curved section, the tension applied to the yarn is substantially varied, resulting in thread breakage or deterioration in stitch quality. It can be.

Republic of Korea Patent Registration No. 1354512 (Name: Sewing Machine with Border Cloth Binder Attached) Japanese Unexamined Patent Publication No. 1995-96901 (Name: sewing device for the rim of the bed) Japanese Unexamined Utility Model No. 1994-75379 (name: sewing machine's thread control device)

The present invention is to solve the problems caused by the prior art as described above, and an object of the present invention is to provide a backstitch apparatus and method configured to secure the quality of backstitch regardless of the edge shape of the mat. .

One aspect of a backstitch device according to an embodiment of the present invention for achieving the above object is a support plate on which a mat is supported, a detection unit for detecting a position value of an edge of the mat; a stitching unit including a needle that moves up and down to stitch the rim member along the rim of the mat transported by the roller; a transport unit intermittently and linearly transporting the mat supported on the upper surface of the support plate in a state in which the needle moves up and down and is separated from the mat; a roller for rotating the mat supported on the upper surface of the support plate in a state in which the needle descends and is inserted into the mat; a tension control unit for adjusting the tension of the thread supplied to the backstitching unit for backstitching of the rim member; and determining the edge shape of the mat according to the position value of the edge of the mat detected by the detection unit, and controlling the operation of the roller and the backstitch unit so that the edge member is sewn to the edge of the mat while the mat is transported. a control unit controlling an operation of the tension adjusting unit so that the tension of the thread supplied to the backstitch unit is adjusted according to the shape of the edge of the mat; wherein the control unit determines the edge shape of the mat as either a straight section or a curved section according to the position value of the edge of the mat detected by the detection unit, and the needle is inserted into the mat. The transfer such that the displacement of the mat with respect to the needle while moving up and down once in the state is increased when the edge shape of the mat is determined to be a curved section compared to when the edge shape of the mat is determined to be a straight section. Controls the operation of the unit and the roller, and reduces the tension of the thread supplied to the backstitch unit when the edge shape of the mat is determined to be a curved section compared to when the edge shape of the mat is determined to be a straight section. Controls the operation of the control unit.

In one aspect of the embodiment of the present invention, the detection unit detects the position value of the edge of the mat as a distance to a preset first reference line, and the control unit determines the edge of the mat detected by the detection unit. When the position value is 0, the shape of the edge of the mat is determined as a straight section, and the operation of the tension adjusting unit is controlled so that the tension of the yarn supplied to the backstitch unit maintains a preset reference tension, and the detection unit When the detected position value of the edge of the mat is a (+) or (-) value, the shape of the edge of the mat is determined as a curved section, and the tension of the thread supplied to the backstitch unit is a tension lower than the reference tension. Controls the operation of the tension adjusting unit to maintain a preset tension.

In one aspect of the embodiment of the present invention, the control unit, when the absolute value of the position value of the edge of the mat detected by the detection unit exceeds 0 and is less than or equal to a predetermined reference value, sets the shape of the edge of the mat to a first curve The operation of the tension adjusting unit is controlled so that the tension of the yarn supplied to the backstitch unit is maintained at a first preset tension lower than the reference tension, and the mat detected by the detection unit When the absolute value of the position value of the edge of the mat exceeds the reference value, the edge shape of the mat is determined as a second curved section, and the tension of the thread supplied to the backstitch unit is less than the reference tension and exceeds the first set tension. An operation of the tension adjusting unit is controlled to maintain a second set tension preset as a tension of .

In one aspect of the backstitch method according to an embodiment of the present invention, in the backstitch method using the backstitch device of claim 1: the detection unit is supported on the upper surface of the support plate and the mat is transported by the transfer unit. a position detection step of detecting a position value of an edge; a shape determination step of determining, by the control unit, the shape of an edge of the mat according to the position value of the edge of the mat detected by the detection unit; a stitching step in which the control unit controls operations of the roller and the lockstitch unit so that the frame member is sewn to the edge of the mat while the mat is transported according to the determined edge shape of the mat; and a tension adjusting step in which the control unit controls an operation of the tension adjusting unit so that the tension of the yarn supplied to the backstitch unit is adjusted according to the edge shape of the mat. In the position detection step, the detection unit detects the position value of the edge of the mat as a distance to a preset first reference line, and in the shape determination step, the control unit determines that the detection unit If the detected position value of the edge of the mat is 0, the shape of the edge of the mat is determined as a straight section, and the position value of the edge of the mat detected by the detection unit is a (+) or (-) value. , the shape of the edge of the mat is determined as a curved section, and in the backstitching step, the control unit controls the operation of the backstitch unit so that the stitching is performed while the needle moves up and down, and the determined edge shape of the mat is determined. In the case of this straight section, the operation of the transfer unit is controlled so that the mat supported on the upper surface of the support plate intermittently moves linearly in a state where the needle moves up and down and is separated from the mat, and the determined edge of the mat If the shape is a curved section, the operation of the roller is controlled so that the mat supported on the upper surface of the support plate rotates in a state in which the needle descends and is inserted into the mat, and the needle moves up and down to separate from the mat. In this state, the operation of the transfer unit is controlled so that the mat supported on the upper surface of the support plate is intermittently moved linearly, and the needle is inserted into the mat while the needle is moved up and down once. The operation of the transfer unit and the roller is controlled so that the displacement of the mat is longer when the edge shape of the mat is determined to be a curved section than when the edge shape of the mat is determined to be a straight section, and in the tension adjusting step, The control unit operates the tension adjusting unit to reduce the tension of the thread supplied to the backstitch unit when the edge shape of the mat is determined to be a curved section compared to when the edge shape of the mat is determined to be a straight section. to control

In one aspect of the embodiment of the present invention, in the tension adjusting step, the control unit, when it is determined that the edge shape of the mat is a straight section, sets the tension of the thread supplied to the backstitch unit to a preset reference tension. The operation of the tension control unit is controlled to maintain the tension, and when the edge shape of the mat is determined to be a curved section, the tension of the thread supplied to the backstitch unit maintains a preset tension at a tension less than the reference tension. The operation of the tension adjusting unit is controlled so as to do so.

In one aspect of the embodiment of the present invention, in the shape determination step, the control unit may, if the absolute value of the position value of the edge of the mat detected by the detection unit exceeds 0 and is less than or equal to a predetermined reference value, the mat of the mat An operation of the tension control unit is controlled so that the tension of the thread supplied to the backstitch unit is maintained at a first preset tension lower than the reference tension by determining the edge shape as a first curved section, and the detection When the absolute value of the position value of the edge of the mat detected by the unit exceeds the reference value, the shape of the edge of the mat is determined as a second curved section so that the tension of the thread supplied to the backstitch unit is less than the reference tension and An operation of the tension adjusting unit is controlled to maintain a second preset tension at a tension higher than the first preset tension.

In the backstitch device and method according to the embodiment of the present invention, the thread tension is adjusted in consideration of the variable stitch spacing according to the edge shape of the mat. Therefore, according to the embodiment of the present invention, thread breakage can be prevented regardless of the edge shape of the mat and more accurate stitching can be achieved.

1 is a plan view showing a backstitch device according to an embodiment of the present invention;
2 is a flow chart showing a method for adjusting thread tension for backstitching mats according to an embodiment of the present invention.

Hereinafter, a backstitch device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram showing a backstitch device according to an embodiment of the present invention.

Referring to FIG. 1 , the backstitch device 1 according to the present embodiment includes a support plate 100, a detection unit 200, a backstitch unit 300, a transfer unit 400, a roller 500, and a tension control unit. 600 and a control unit (C). In particular, in this embodiment, the tension of the thread T supplied to the backstitch unit 300 is varied by the tension adjusting unit 600 according to the shape of the edge of the mat M.

More specifically, the support plate 100 is where the mat M is supported on its upper surface. The support plate 100 and the mat M are transferred while being supported on the upper surface of the support plate 100 . Therefore, the trajectory formed by the edge of the mat M by the transfer will be located on the upper surface of the support plate 100.

And the detection unit 200 detects the position value of the edge of the mat M. The detection unit 200 is disposed in front of the backstitch unit 300 in the direction in which the mat M is transported. Therefore, one side of the edge of the mat M whose position value is detected by the detection unit 200 is the other side of the edge of the mat M that is sewn by the backstitch unit 300, as will be described later. will be said to precede it.

Substantially, the detection unit 200 detects the position value of the edge of the mat M, which varies according to the transport of the mat M. In this embodiment, the detection unit 200 detects the position value of the edge of the mat M as 0, a (+) value, or a (-) value with respect to a preset first reference line L1. For example, the detection unit 200 may detect a linearly moving value in association with the movement of the edge of the mat M according to the transport of the edge of the mat M. And if the position of the edge of the mat M corresponding to the straight section is set to the first reference line L1, the detection unit 200 depending on whether the edge shape of the mat M is a straight line or a curved section The position value of the edge of the mat M may be detected as 0, a (+) value, or a (-) value with respect to the first reference line L1. When the detection unit 200 moves to the left in FIG. 1 centered on the first reference line L1 by the transfer of the mat M (part ⓐ in FIG. 1) is set to a positive value. And, in the case of moving to the right on the drawing in FIG. 1 centered on the first reference line L1 (part ⓑ in FIG. 1), it can be set as a (-) value.

Meanwhile, the backstitch unit 300 sews the rim member D along the rim of the mat M transported by the roller 500 . Substantially, the rim member D is supplied to surround the rim of the mat M and parts of the upper and lower surfaces of the mat M adjacent thereto, and the backstitch unit 300 moves up and down at predetermined time intervals. and a needle 310 for stitching the rim member D to the rim of the mat M using the thread T supplied while doing so.

The transfer unit 400 transfers the mat M supported on the upper surface of the base plate 100 in a linear direction. In this embodiment, the needle 310 moves up and down and intermittently linearly transports the mat (M) supported on the upper surface of the base plate 100 by a predetermined transfer distance in a state where it is spaced apart from the mat (M). let it The conveying unit 400, for example, while reciprocating along an elliptical moving trajectory on a virtual plane orthogonal to the upper surface of the base plate 100, the mat M can be pushed and conveyed in a linear direction. there is.

More specifically, the transport unit 400 is transported in a direction parallel to the upper surface of the base plate 100 to press-transmit the mat M from the initial position in contact with the upper surface of the mat M. move to location Therefore, the mat M is linearly transferred by the distance between the initial position and the transfer position. Then, the transfer unit 400 moves to the initial position after being spaced apart from the upper surface of the mat M at the transfer position. Therefore, it can be said that the linear transfer of the mat M by the transfer unit 400 is performed only during the time when the transfer unit 400 moves from the initial position to the transfer position. The movement of the transfer unit 400 from the initial position to the transfer position is performed only in a state in which the lockstitch unit 300, substantially the needle 310, is lifted and separated from the mat M. Therefore, substantially, the length of stitches in the process of being sewn by the backstitch unit 300 is set according to the distance that the transport unit 400 linearly transports the mat M.

Next, the roller 500 substantially rotates the mat M supported on the upper surface of the support plate 100 . In this embodiment, a pair of first and second rollers 510 ( 520).

More specifically, the first and second rollers 510 and 520 have their respective rotational shafts 510A and 520A in a state in which their outer circumferential surfaces are in contact with the upper and lower surfaces of the mat M, which are vertically opposed, respectively. each rotates around At this time, the first and second rollers 510 and 520 are disposed on a second reference line L2 extending in a direction orthogonal to the first reference line L1 and passing through the needle 310, They are spaced apart from each other in the direction of the second reference line L2. Substantially, the first and second rollers 510 and 520 may be formed into cylindrical shapes having the same diameter.

The tension control unit 600 controls the tension of the thread T supplied to the backstitch unit 300 for backstitching of the frame member B. Substantially, the tension control unit 600 may adjust the tension of the thread T supplied to the backstitch unit 300 in consideration of a preset stitch length. At this time, the tension control unit 600 adjusts the tension of the thread T by, for example, controlling an external force that presses one side of the thread T supplied to the backstitch unit 300. can Accordingly, the tension of the thread T may be increased in proportion to the pressure applied by the tension control unit 600 to the thread T supplied to the backstitch unit 300 .

And, the control unit (C) controls the operation of the roller 500 and the backstitch unit 300 so that the frame member (D) is sewn to the edge of the mat (M) while the mat (M) is transported. . In addition, the control unit (C) controls the operation of the tension adjusting unit (600) so that the tension of the thread (T) supplied to the backstitch unit (300) is adjusted according to the edge shape of the mat (M). do.

More specifically, in this embodiment, the control unit (C) determines the shape of the edge of the mat (M) according to the position value of the edge of the mat (M) detected by the detection unit (200). do. In addition, the control unit (C) controls the roller 500 so that the frame member (D) is sewn to the edge of the mat (M) while the mat (M) is transported according to the determined shape of the mat (M). and controls the operation of the backstitch unit 300. At this time, the control unit (C), according to the determined shape of the mat (M), the transfer unit 400 or the roller 500 so that the linear transfer or rotation and linear transfer of the mat (M) are alternately made ) and controls the operation of the transfer unit 400.

In other words, the control unit (C) determines the edge shape of the mat (M) as a straight section or a curved section according to the position value of the edge of the mat (M) detected by the detection unit (200). . That is, if the position value of the edge of the mat M with respect to the first reference line L1 detected by the detection unit 200 is 0, the control unit C determines the edge of the mat M The shape is judged as a straight section. And the control unit (C), if the position value of the edge of the mat (M) with respect to the first reference line (L1) detected by the detection unit 200 is a (+) value or (-) value, The edge shape of the mat M is determined as a curved section.

Next, when the control unit (C) determines that the edge shape of the mat (M) is a straight section, while the mat (M) is linearly transported by the transfer unit 400, the needle 310 ) descends to control the stitching of the edge of the mat (M) by the stitching unit 300. Substantially, the transfer by the transfer unit 400 is performed in a state in which the needle 310 is elevated.

And, when the control unit (C) determines that the edge shape of the mat (M) is a curved section, after the mat (M) is rotated by the roller 500, by the transfer unit (400) The operation of the roller 500 and the transport unit 400 is controlled so that the mat M is linearly transported. At this time, the rotation of the mat M by the roller 500 is performed in a state in which the needle 310 descends and is inserted into the mat M, and the mat by the transfer unit 400 ( Linear transfer of M) is performed in a state in which the needle 310 is lifted and separated from the mat (M). Accordingly, the rotation of the mat M by the roller 500 and the linear conveyance of the mat M by the transfer unit 400 are alternately performed.

In addition, in this embodiment, the control unit (C) controls the position at which the backstitch unit 300 is stitched, that is, the needle ( 310), the movement of the conveying unit 400 or the roller 500 and the conveying unit 400 is increased so that the displacement of the edge of the mat M increases in the case of a curved section compared to the case of a straight section. Control. Therefore, when the edge shape of the mat M is a curved section compared to a straight section, the sweat length is substantially increased. And, in this way, when the stitch length varies according to whether the edge shape of the mat M is a straight section or a curved section, substantially, the tension acting on the thread T sewn by the backstitch unit 300 Variation is required for

In this embodiment, the control unit (C) controls the tension of the tension control unit 600 so that the tension of the yarn (T) supplied to the backstitch unit 300 is adjusted according to the edge shape of the mat (M). control the action In particular, the control unit (C) determines the yarn (T) relative to the case where the edge shape of the mat (M) is determined to be a curved section compared to the case where the edge shape of the mat (M) is determined to be a straight section. The operation of the tension adjusting unit 600 is controlled so that the tension of the is reduced. As described above, in this embodiment, when the edge shape of the mat M is a curved section compared to a straight section, the needle 310 moves during the time the needle 310 moves up and down once. This is because the displacement is controlled for a long time based on .

More specifically, the control unit (C), when it is determined that the edge shape of the mat (M) is a straight section, the tension of the yarn (T) supplied to the backstitch unit 300 is determined based on a preset standard. The operation of the tension adjusting unit 600 may be controlled to maintain the tension Ts. Here, the 'reference tension (Ts)' may be set according to the type of the thread (T), that is, the material or thickness of the thread (T). And, when the control unit (C) determines that the edge shape of the mat (M) is a curved section, the backstitch unit 300 according to the radii (R1) (R2) of the edge shape of the mat (M). The operation of the tension adjusting unit 600 is controlled so that the tension of the thread T supplied to the thread is maintained at a preset tension lower than the reference tension Ts.

In particular, in this embodiment, when the control unit (C) determines that the edge shape of the mat (M) is a curved section, the tension of the thread (T) supplied to the backstitch unit (300) is preset. The reduction to the set tension is controlled in stages. This is in consideration of the difference in the rate at which the displacement of the position sewn by the backstitch unit 300 varies at the time when the edge shape of the mat M changes from a straight section to a curved section or from a curved section to a straight section. This is to adjust the tension of the yarn (T).

That is, in a portion where the shape of the edge of the mat M varies from a straight section to a curved section, the position value of the edge of the mat M detected by the detection unit 200 ranges from 0 to a (+) value or It changes rapidly with a (-) value. However, in a portion where the edge shape of the mat M is continuous in the curved section, the position value of the edge of the mat M detected by the detection unit 200 is a positive value or a negative value. Its absolute value varies within a relatively small range.

In consideration of this, in this embodiment, the control unit (C) sets the tension of the yarn (T) supplied to the backstitch unit (300) to a first set tension preset to a tension less than the reference tension (Ts). (T1) and a second preset tension (T2) preset to a tension less than the reference tension (Ts) and greater than the first preset tension (T1) of the tension control unit (600). control the action

More specifically, the control unit (C) determines again the case where the edge shape of the mat (M) is a curved section according to the position value of the edge of the mat (M) detected by the detection unit (200). It is determined as one of the 1st and 2nd curve sections. That is, when the absolute value of the position value of the edge of the mat M detected by the detection unit 200 exceeds 0 and is less than or equal to a predetermined reference value, the control unit C determines the edge of the mat M. The shape is determined as a first curved section. The control unit (C), when the absolute value of the position value of the edge of the mat (M) detected by the detection unit (200) exceeds the reference value, sets the shape of the edge of the mat (M) to a second curve. judge by segment. Therefore, substantially, the shape of the edge of the mat (M), straight section-first curved section-second curved section-first curved section-straight section will continue in order.

And, when the control unit (C) determines that the edge shape of the mat (M) is a first curved section, the tension of the thread (T) supplied to the backstitch unit (300) is the first set tension ( The operation of the tension adjusting unit 600 is controlled to maintain T1). In addition, when the control unit (C) determines that the edge shape of the mat (M) is the second curved section, the tension of the thread (T) supplied to the backstitch unit (300) is set to the second setting. The operation of the tension adjusting unit 600 is controlled to maintain the tension T2.

In other words, the control unit (C), in the first half immediately after the edge shape of the mat (M) enters the curved section from the straight section and the later (later period) immediately before entering the straight section from the curved section , The operation of the tension adjusting unit 600 is controlled such that the tension of the thread T supplied to the backstitch unit 300 is relatively further reduced when the edge shape of the mat M has a straight section. In addition, the control unit (C) controls the tension of the yarn (T) supplied to the backstitch unit (300) in the middle period when the edge shape of the mat (M) enters the curved section. The operation of the tension adjusting unit 600 is controlled so that the edge shape of is reduced relatively less when it is a straight section.

For example, when the shape of the edge of the mat M is varied from a straight section to the part ⓐ in FIG. 1, the position value of the edge of the mat M is a positive value by the detection unit 200. will be detected as At this time, when the edge shape of the mat M is the first curved section, the position value of the edge of the mat M detected by the detection unit 200 is increased from 0 to (+) 2.5 cm. can Also, when the shape of the edge of the mat M is the second curved section, the position value of the edge of the mat M detected by the detection unit 200 may be increased to (+) 5.0 cm.

And the control unit (C), according to the position value of the edge of the mat (M) detected by the detection unit 200, the shape of the edge of the mat (M) to one of the first and second curved sections judge Substantially, the control unit (C) determines that the tension of the yarn (T) supplied to the backstitch unit 300 is the reference tension ( Ts) is controlled to decrease at a rate of 20%. In addition, when the control unit (C) determines that the edge shape of the mat (M) is the second curved section, the tension of the thread (T) supplied to the backstitch unit (300) is the reference tension (Ts). ) is controlled to decrease at a rate of 10% for Of course, when the edge shape of the mat M is varied from the straight section to the part ⓑ in FIG. 1, the position value of the edge of the mat M detected by the detection unit 200 is a (-) value. However, control of the tension of the thread T supplied to the backstitch unit 300 will be substantially the same. In summary, it is shown in [Table 1] below.

ⓐ part ⓑ part Position value (cm) Set tension (%) Position value (cm) Set tension (%) 1st curve section +2.5 80 -2.5 80 2nd curve section +5.0 90 -5.0 90

Hereinafter, a backstitch method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a flow chart showing a method for adjusting thread tension for backstitching mats according to an embodiment of the present invention.

Referring to FIG. 2 , the backstitch method according to the present embodiment includes a position detection step (S100), a shape determination step (S200), a backstitch step (S300), and a tension control step (S400).

More specifically, in the position detection step (S100), the detection unit 200 detects the position value of the edge of the mat M, which is supported on the upper surface of the support plate 100 and is transported by the roller 500. do. As described above, in the position detection step (S100), the detection unit 200 sets the position value of the edge of the mat M to 0, a (+) value, or a (-) value with respect to the first reference line L1. ) value can be detected.

Next, in the shape determination step (S200), the control unit (C) determines the edge shape of the mat (M) according to the position value of the edge of the mat (M) detected by the detection unit (200). judge Substantially in the shape determination step (S200), the control unit (C) determines the edge shape of the mat (M) according to the position value of the edge of the mat (M) detected by the detection unit (200). It can be judged as a straight section or a curved section.

More specifically, in the shape determination step (S200), the control unit (C), when the position value of the edge of the mat (M) detected by the detection unit 200 is 0, the mat ( The edge shape of M) can be judged as a straight section. And, in the shape determination step (S200), the control unit (C), when the position value of the edge of the mat (M) detected by the detection unit 200 is a (+) value or (-) value , It can be determined that the edge shape of the mat M is a curved section.

Furthermore, in the shape determination step (S200), the control unit (C), when the absolute value of the position value of the edge of the mat (M) detected by the detection unit 200 is greater than 0 and less than or equal to a predetermined reference value In, the shape of the edge of the mat (M) is determined as a first curved section. And in the shape determination step (S200), the control unit (C), when the absolute value of the position value of the edge of the mat (M) detected by the detection unit (200) exceeds the reference value, the mat ( The edge shape of M) is determined as the second curved section.

In the backstitching step (S300), the control unit (C), while the mat (M) is transported, sews the rim member (D) to the rim of the mat (M), so that the backstitching unit 300 and the transfer unit 400 and controls the operation of roller 500. Substantially in the stitching step (S300), the control unit (C) transfers the mat (M) according to the determined edge shape of the mat (M), that is, a straight section or a curved section of the mat (M). While doing so, the operation of the stitching unit 300, the conveying unit 400, and the roller 500 is controlled so that the frame member D is stitched to the rim of the mat M. In particular, in this embodiment, the control unit (C), when the edge shape of the mat (M) is a curved section compared to the case of a straight section, the edge of the mat (M) with respect to the needle (310) The operations of the lockstitch unit 300, the transfer unit 400, and the roller 500 are controlled so that the displacement of the part increases, that is, the stitch length increases.

Finally, in the tension adjusting step (S400), the control unit (C) adjusts the tension so that the tension of the yarn (T) supplied to the backstitch unit 300 is adjusted according to the edge shape of the mat (M). Controls the operation of unit 600. That is, in the tension adjusting step (S400), the control unit (C) controls the yarn (T) supplied to the backstitch unit 300 according to whether the edge shape of the mat (M) is a straight section or a curved section. The operation of the tension adjusting unit 600 is controlled so that the tension of ) is adjusted.

In particular, in the tension adjusting step (S400), the control unit (C) determines that the edge shape of the mat (M) is a straight section, the yarn (T) supplied to the backstitch unit (300) The operation of the tension adjusting unit 600 is controlled so that the tension of the tension maintains the preset reference tension Ts. However, in the tension adjusting step (S400), when the control unit (C) determines that the edge shape of the mat (M) is the first curved section, the thread supplied to the backstitch unit (300) ( The operation of the tension adjusting unit 600 is controlled so that the tension of T) maintains the first set tension T1 preset at a tension lower than the reference tension Ts. In addition, in the tension adjusting step (S400), the control unit (C), when the edge shape of the mat (M) is determined to be the second curved section, the yarn supplied to the backstitch unit 300 ( The operation of the tension adjusting unit 600 is controlled so that the tension of T is less than the reference tension Ts and greater than the first set tension T1 and maintains a preset second set tension T2.

Within the scope of the basic technical idea of the present invention, many other modifications are possible to those skilled in the art, and the scope of the present invention should be interpreted based on the appended claims. will be.

100: support plate 200: detection unit
300: backstitch unit 310: needle
400: transfer unit 500: roller
600: tension control unit C: control unit

Claims (6)

A support plate 100 on which the mat M is supported on its upper surface
a detection unit (200) for detecting a position value of an edge of the mat (M);
A stitching unit 300 including a needle 310 that moves up and down to stitch the rim member D along the rim of the mat M transported by the roller 500;
A transfer unit 400 that intermittently linearly transfers the mat M supported on the upper surface of the support plate 100 while the needle 310 moves up and down and is separated from the mat M;
a roller 500 for rotating the mat M supported on the upper surface of the support plate 100 when the needle 310 descends and is inserted into the mat M;
a tension control unit 600 for adjusting the tension of the thread T supplied to the backstitch unit 300 for backstitching of the rim member D; and
The edge shape of the mat M is determined according to the position value of the edge of the mat M detected by the detection unit 200, and the edge member D moves the mat while the mat M is transported. The operation of the roller 500 and the backstitch unit 300 are controlled so as to be sewn to the edge of the mat (M), and the yarn (T) supplied to the backstitch unit 300 according to the shape of the edge of the mat (M) a control unit (C) for controlling the operation of the tension adjusting unit 600 so that the tension is adjusted; including,
The control unit (C),
According to the position value of the edge of the mat (M) detected by the detection unit 200, the shape of the edge of the mat (M) is determined as either a straight section or a curved section,
The displacement of the mat (M) with respect to the needle (310) while the needle (310) moves up and down once in the state where it is inserted into the mat (M) is a straight section in which the shape of the edge of the mat (M) is Controls the operation of the transfer unit 400 and the roller 500 so that the edge shape of the mat M is increased when it is determined to be a curved section compared to when it is determined to be
The tension of the thread T supplied to the backstitch unit 300 is reduced when the edge shape of the mat M is determined to be a curved section compared to when the edge shape of the mat M is determined to be a straight section. A backstitch device for controlling the operation of the tension adjusting unit 600 so as to be possible.
According to claim 1,
The detection unit 200 detects the position value of the edge of the mat M as a distance to a preset first reference line L1,
The control unit (C),
When the position value of the edge of the mat M detected by the detection unit 200 is 0, the shape of the edge of the mat M is determined as a straight section and the thread supplied to the backstitch unit 300 is determined. Control the operation of the tension adjusting unit 600 so that the tension of (T) maintains a preset reference tension (Ts),
When the position value of the edge of the mat M detected by the detection unit 200 is a (+) or (-) value, the shape of the edge of the mat M is determined as a curved section, and the backstitch unit 300 ) Controlling the operation of the tension adjusting unit 600 so that the tension of the thread T supplied to the thread maintains a predetermined set tension at a tension lower than the reference tension Ts.
According to claim 2,
The control unit (C),
When the absolute value of the position value of the edge of the mat (M) detected by the detection unit 200 exceeds 0 and is less than or equal to a preset reference value, the shape of the edge of the mat (M) is determined as a first curved section, and the The operation of the tension adjusting unit 600 is controlled so that the tension of the thread T supplied to the backstitch unit 300 maintains a first set tension T1 that is preset to a tension lower than the reference tension Ts. do,
When the absolute value of the position value of the edge of the mat (M) detected by the detection unit (200) exceeds the reference value, the shape of the edge of the mat (M) is determined as a second curved section, and the backstitch unit (300) The tension control unit ( 600) to control the operation of the lockstitch device.
A backstitch method using the backstitch device of claim 1 comprising:
A position detection step (S100) in which the detection unit 200 detects a position value of an edge of the mat M, which is supported on the upper surface of the support plate 100 and is transported by the transfer unit 400;
a shape determination step (S200) in which the control unit (C) determines the shape of the edge of the mat (M) according to the position value of the edge of the mat (M) detected by the detection unit (200);
The roller 500 allows the control unit (C) to sew the rim member (D) to the rim of the mat (M) while the mat (M) is transported according to the determined rim shape of the mat (M) and a backstitch step of controlling the operation of the backstitch unit 300 (S300); and
The control unit (C) controls the operation of the tension control unit (600) so that the tension of the thread (T) supplied to the backstitch unit (300) is adjusted according to the edge shape of the mat (M). Step (S400); including,
In the position detection step (S100),
The detection unit 200 detects the position value of the edge of the mat M as a distance to a preset first reference line L1,
In the shape determination step (S200),
The control unit (C), when the position value of the edge of the mat (M) detected by the detection unit 200 is 0, determines the shape of the edge of the mat (M) as a straight section, and the detection When the position value of the edge of the mat (M) detected by the unit 200 is a (+) or (-) value, the shape of the edge of the mat (M) is determined as a curved section,
In the backstitch step (S300),
The control unit (C) controls the operation of the backstitch unit 300 so that the stitches are made while the needles 310 go up and down, but when the determined edge shape of the mat (M) is a straight section, Control the operation of the transfer unit 400 so that the mat (M) supported on the upper surface of the support plate 100 intermittently linearly moves in a state in which the needle 310 moves up and down and is separated from the mat (M) And, when the determined edge shape of the mat (M) is a curved section, the mat supported on the upper surface of the support plate 100 in a state in which the needle 310 descends and is inserted into the mat (M) The mat (M) supported on the upper surface of the support plate 100 in a state of being spaced apart from the mat (M) by controlling the operation of the roller 500 so that (M) rotates and lifting the needle 310 Controls the operation of the transfer unit 400 so that intermittently linearly moves,
The displacement of the mat (M) with respect to the needle (310) while the needle (310) moves up and down once in the state where it is inserted into the mat (M) is a straight section in which the shape of the edge of the mat (M) is The operation of the transfer unit 400 and the roller 500 is controlled so that the case where the edge shape of the mat M is determined to be a curved section is longer than when it is determined as
In the tension adjusting step (S400),
The control unit (C) controls the stitching unit 300 to supply the stitching unit 300 when the edge shape of the mat M is determined to be a curved section compared to when the edge shape of the mat M is determined to be a straight section. A method of controlling the operation of the tension adjusting unit 600 so that the tension of the thread T is reduced.
According to claim 4,
In the tension adjusting step (S400),
The control unit (C),
When the edge shape of the mat M is determined to be a straight section, the tension control unit 600 maintains the tension of the yarn T supplied to the backstitch unit 300 at a preset reference tension Ts. ) to control the operation of
When the edge shape of the mat M is determined to be a curved section, the tension of the yarn T supplied to the backstitch unit 300 is less than the reference tension Ts and maintains a preset set tension. Backstitch method for controlling the operation of the tension adjusting unit 600 so as to.
According to claim 5,
In the shape determination step (S400),
The control unit (C),
When the absolute value of the position value of the edge of the mat (M) detected by the detection unit 200 exceeds 0 and is less than or equal to a preset reference value, the shape of the edge of the mat (M) is determined as a first curved section, and the The operation of the tension adjusting unit 600 is controlled so that the tension of the thread T supplied to the backstitch unit 300 maintains a first set tension T1 that is preset to a tension lower than the reference tension Ts. do,
When the absolute value of the position value of the edge of the mat (M) detected by the detection unit (200) exceeds the reference value, the shape of the edge of the mat (M) is determined as a second curved section, and the backstitch unit (300) ) The tension control unit 600 maintains the tension of the yarn T supplied to the second set tension T2, which is preset to a tension less than the reference tension Ts and greater than the first set tension T1. ) method of controlling the operation of the backstitch.

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