KR20230094538A - Device and method for stitching - Google Patents

Abstract

The present invention provides a sewing device. One aspect of the sewing device according to an embodiment of the present invention is to continuously sew the upper and lower sewing materials at predetermined stitch intervals along a sewing line set to be spaced apart by a predetermined sewing interval from the upper and lower edges of the upper and lower sewing materials stacked vertically In the sewing device for sewing with: The sewing device, the upper and lower sewing material is supported on the upper and lower surfaces, respectively, the base plate; Upper and lower detection units for detecting the position of the upper and lower edges of the sewing material; A backstitch unit including a needle that sews the upper and lower sewing materials while moving up and down from a backstitch start position to sew along the seam line; In a state in which the needle is spaced apart from the upper and lower sewing materials, upper and lower transfer units rotating and linearly moving to transfer the upper and lower sewing materials supported on the upper surface of the base plate, respectively; While the upper and lower sewing materials are transported according to the edge positions of the upper and lower sewing materials detected by the upper and lower sensing units, the upper and lower sewing materials are sewn along the sewing line while the stitching unit and the upper and lower conveying a control unit that controls the operation of the unit; includes

Description

Sewing device {DEVICE AND METHOD FOR STITCHING}

The present invention relates to a sewing device.

In general, in the case of sewing, in a state in which two sewing materials, for example, two sewing materials of the same shape are arranged so that they overlap, the two sewing materials are sewn while being transported so that the edges of the two sewing materials are molded to each other, or the edges of the mat are continuously stitched. It is made by stitching the supplied rim member. Recently, various methods for automating this have been proposed.

Referring to the prior patent documents, conventionally, the detection unit detects the shape of the edge of the sewing material, and accordingly, the sewing material is transferred while stitching is performed. More specifically, in the prior art, in a state in which a plurality of upper rollers and a plurality of lower rollers rotating around a horizontal axis of rotation are vertically opposed to each other, the outer circumferential surfaces of the upper and lower sewing materials are By rotating in contact with the lower surface of the water, and each of the upper roller and the lower roller rotates at a different number of rotations, the sewing material is transported while changing the direction according to the shape of the rim.

However, according to the sewing device according to the prior art, the following problems occur.

First, in the prior art, the position of the edge of the sewing material is sensed, and accordingly, the sewing material is sewn while being transported. However, in the prior art documents, the specific method, in particular, in the case of sewing products in which straight lines and curves are repeated, a specific configuration for selectively transferring the sewing fabric in a straight line or a curve and a specific configuration in which transfer and stitching are performed along the edge of the sewing fabric This is not disclosed at all. In particular, when the sewing material is rotated and then transferred, the straight line distance between the previous sewing position and the sewing position after rotation and transfer of the sewing material becomes an interval exceeding the actual stitch interval. However, in the prior art, a technique for correcting this has not been proposed at all.

On the other hand, in the prior art, the sewing material is linearly moved by the presser foot reciprocating in a predetermined trajectory, and when in contact with the upper roller and the lower surface of the lower sewing material in contact with the upper surface of the upper sewing material, by adjusting the number of rotations of the lower roller , it can be transferred while the direction is varied according to the shape of the rim. However, in the case of sewing material having a relatively thin thickness, in the process of linear movement by the presser foot or rotation by the roller, only a portion of the sewing material in contact with the presser foot or roller is transported or rotated, which may cause wrinkles, which ultimately causes As a result, it causes a problem that accurate stitching cannot be performed.

Furthermore, in the prior art, the conveyance and rotation of the sewing material is made by each configuration. Therefore, in the prior art, the number of parts for conveying and rotating the sewing material is increased, and the control is also complicated.

Japanese Unexamined Patent Publication No. 1995-096091 (Name: sewing device for the rim of the carpet) Republic of Korea Patent No. 2093407 (Name: Mat sewing device) Korean Registered Patent No. 2110255 (Name: Mat sewing device) Republic of Korea Utility Model Publication No. 2000-0019309 (Name: Quilting) Republic of Korea Patent Registration No. 1354512 (Name: Sewing Machine with Border Cloth Binder Attached) Republic of Korea Patent Registration No. 1558155 (Name: vehicle mat structure)

An object of 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 sewing device configured to perform accurate transfer and stitching at regular intervals according to the shape of the edge of the sewing material. is to provide

An object of the present invention is, in particular, to provide a sewing device configured to enable accurate transfer and stitching even in the case of sewing materials made of thin material.

Another object of the present invention is to provide a sewing device configured so that sewing materials can be transported and stitched more simply.

One aspect of the sewing device according to an embodiment of the present invention for achieving the above object is the upper and lower sewing materials along a sewing line set to be spaced apart by a predetermined sewing interval from the rim of the upper and lower sewing materials stacked up and down In the sewing device for continuously stitching at predetermined stitch intervals: The sewing device includes: a base plate on which the upper and lower sewing materials are supported on upper and lower surfaces, respectively; Upper and lower detection units for detecting the position of the upper and lower edges of the sewing material; A backstitch unit including a needle that sews the upper and lower sewing materials while moving up and down from a backstitch start position to sew along the seam line; In a state in which the needle is spaced apart from the upper and lower sewing materials, upper and lower transfer units rotating and linearly moving to transfer the upper and lower sewing materials supported on the upper surface of the base plate, respectively; While the upper and lower sewing materials are transported according to the edge positions of the upper and lower sewing materials detected by the upper and lower sensing units, the upper and lower sewing materials are sewn along the sewing line while the stitching unit and the upper and lower conveying a control unit that controls the operation of the unit; includes

In one aspect of the embodiment of the present invention, the upper and lower transfer units rotate forward or backward to transfer the upper and lower sewing materials in the first or second transfer direction, respectively, or the first or second In order to transfer in the first or second correction direction orthogonal to the transfer direction, it moves linearly in the forward or reverse direction.

In one aspect of the embodiment of the present invention, the upper and lower detection units are located at a sensing position spaced apart from the sewing position by the stitch interval and the sewing interval in the second transport direction and the first or second correction direction. It detects whether the upper and lower edges of the sewing material are positioned, respectively.

In one aspect of the embodiment of the present invention, the control unit, forward rotation or reverse rotation of the upper and lower conveying units for conveying the upper and lower sewing materials in the first or second conveying direction and the upper and lower sewing For the transfer of water in the first and second correction directions, the upper and lower transfer units are controlled to alternately linearly move in forward or reverse directions.

In one aspect of the embodiment of the present invention, the control unit, when it is detected that the upper or lower edge of the sewing material is located at the detection position by the upper or lower detection unit, the upper or lower part to be spaced apart from the detection position After the sewing material is transferred in the first correction direction, the upper or lower sensing unit rotates the upper or lower conveying unit at the time when it is detected that the upper or lower sewing material is separated from the detection position. Alternatively, the lower sewing material is controlled to be transferred in the first transfer direction by the stitch interval.

In one aspect of the embodiment of the present invention, the control unit, when it is detected that the upper or lower edge of the sewing material is not located at the detection position by the upper or lower detection unit, the upper to move toward the detection position Alternatively, when the lower sewing material is transported in the second correction direction and it is detected that the upper or lower sewing material edge is located at the detection position by the upper or lower detection unit, the upper or lower part is separated from the detection position again. After the sewing material is transferred in the first correction direction, the upper or lower sensing unit rotates the upper or lower conveying unit at the time when it is detected that the upper or lower sewing material is separated from the detection position. Alternatively, the lower sewing material is controlled to be transferred in the first transfer direction by the stitch interval.

In one aspect of the embodiment of the present invention, the control unit, when the upper or lower sewing material is transferred in the first or second correction direction, between the backstitch completion position and the backstitch start position where the backstitch is completed by the backstitch unit The upper or lower sewing material is controlled to be transferred in the second transfer direction by reverse rotation of the upper or lower transfer unit so that the interval of is corrected by the stitch interval.

In one aspect of the embodiments of the present invention, the upper and lower conveying units include upper and lower conveying rollers respectively rotating around upper and lower rotational shafts; The first upper and lower conveying rollers provide a driving force so that the upper and lower conveying rollers rotate in a forward or reverse direction about the upper and lower rotation shafts, respectively, for conveyance in the first or second conveying direction of the upper and lower sewing materials. 1 lower driving source; And the upper and lower conveying rollers for conveying the upper and lower sewing materials in the first or second correcting direction provide a driving force so that the upper and lower conveying rollers are linearly moved in a forward or reverse direction parallel to the upper rotating shaft, respectively. 2 lower drive source; includes

In one aspect of the embodiment of the present invention, the upper transfer unit further includes a third upper drive source for providing a driving force so that the upper transfer roller elevates and descends for selective contact between the upper transfer roller and the upper sewing material.

According to the sewing device according to an embodiment of the present invention it is possible to expect the following effects.

First, in the embodiment of the present invention, according to the shape of the edge of the sewing material detected by the sensing unit, the sewing material is transferred in the first transfer direction by the stitch interval by the transfer unit or in the first or second correction direction orthogonal to the first transfer direction. After being transferred to the stitch interval, it is transferred in the first transfer direction. In particular, in the embodiment of the present invention, when the distance between the backstitch position and the backstitch start position by the transfer in the first or second correction direction exceeds the stitch distance, the second transfer opposite to the first transfer direction The sewing material is transferred in the direction and the distance between the stitched position and the stitched start position is corrected as a stitch interval. Therefore, according to the embodiment of the present invention, the transfer according to the shape of the rim of the sewing material and the stitching thereof can be accurately performed.

In addition, in the embodiment of the present invention, the conveying according to the shape of the rim of the sewing material is performed by linear movement rather than rotation of the conveying unit. In particular, in this embodiment, since the movement and position correction of the sewing material is performed while the transfer unit is in contact with the surface of the sewing material, wrinkles may occur on the sewing material due to intermittent operation between the transfer unit and the sewing material, especially , Even if the sewing material is made of a relatively thin material, it is possible to prevent a phenomenon such as wrinkles in the sewing material.

Therefore, according to the embodiment of the present invention, it is possible to expect sewing according to a more accurate edge shape with respect to a relatively thin sewing material.

And in the embodiment of the present invention, the sewing material is conveyed in the first or second conveying direction or conveyed in the first or second correction direction by rotation and linear movement of the conveying unit. Therefore, according to the embodiment of the present invention, the transfer according to the shape of the edge of the sewing material and the stitching thereof can be made with a simpler configuration.

1 is a front view showing a sewing device according to an embodiment of the present invention.
Figure 2 is a plan view showing the main part of the embodiment of the present invention.
Figure 3 is a plan view schematically showing the process of conveying and stitching the sewing material according to the shape of the edge of the sewing material in an embodiment of the present invention.

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

Figure 1 is a front view showing a sewing device according to an embodiment of the present invention, Figure 3 is a plan view showing the main part of the embodiment of the present invention, Figure 3 is the conveyance of the sewing material according to the shape of the edge of the sewing material in the embodiment of the present invention and It is a plan view schematically showing the process of stitching.

First, referring to FIGS. 1 and 2, the sewing device 1 according to the embodiment of the present invention includes a base plate 100, upper and lower detection units 201 and 202, a backstitch unit 300, an upper and lower transfer units 401 and 402 and a control unit (C). In particular, the sewing device 1, along the sewing line (L) is set to be spaced apart by a predetermined sewing interval (G) from the edge of the upper and lower sewing material (MA) (MB) stacked up and down, the upper and lower parts The sewing material (MA) (MB) is continuously stitched at a predetermined stitch interval (g).

More specifically, the base plate 100 is a place where the upper and lower sewing materials (MA) (MB) to be sewn are supported on its upper and lower surfaces, respectively. That is, the upper and lower sewing materials (MA) (MB) are sewn along the seam line (L) while being transported while supported on the upper and lower surfaces of the base plate 100, respectively.

Meanwhile, in this embodiment, a backstitch opening 110 is formed in the base plate 100 . The backstitch opening 110 is formed by cutting a portion of the base plate 100 . Substantially, the lockstitch opening 110, a needle 310 to be described later, penetrates in a lowered state for lockstitch.

And the upper and lower detection units 201 and 202 detect the position of at least one edge of the upper and lower sewing materials (MA) (MB), respectively. Substantially, the upper and lower sensing units 201 and 202 are the upper and lower sewing materials (MA) (MB) that can be varied according to the transfer of the upper and lower sewing materials (MA) (MB). It can be said that each edge position is detected. In particular, in this embodiment, the upper and lower detection units 201 and 202 detect whether the upper and lower edges of the upper and lower sewing materials (MA) (MB) are positioned at the detection position (P), respectively.

Here, as will be described later, the 'sensing position P' is spaced apart from the backstitch start position p1 in the second transfer direction A2 by the stitch interval g, and from the backstitch start position p1 to the second transfer direction A2. It may be defined as a position spaced apart by the sewing interval (G) in the correction direction (B2). And as the upper and lower detection units 201 and 202, an optical sensor for respectively detecting whether the upper and lower sewing materials (MA) (MB) are positioned at the detection position (P) by light emission and light reception. can be used

The backstitch unit 300 sews the upper and lower sewing materials MA and MB along the sewing line L. In this embodiment, the stitching unit 300 includes a needle 310 for stitching the upper and lower sewing materials MA and MB along the sewing line L while moving up and down. In practice, the upper and lower sewing materials MA and MB are sewn by a thread while the needle 310 moves up and down and repeatedly inserts and separates the upper and lower sewing materials MA and MB. And, while descending, the needle 310 sequentially penetrates the upper sewing material Ma, the backstitch opening 110, and the lower sewing material Ma and Mb. Hereinafter, a position directly below the needle 310, that is, a position where stitching is performed by the needle 310 is referred to as a stitching start position p1.

Next, the upper and lower transfer units 401 and 402, in a state in which the needle 310 is spaced apart from the upper and lower sewing materials MA and MB, the upper surface and It rotates and moves linearly to transfer the upper and lower sewing materials (MA) (MB) respectively supported on the lower surface. In particular, in this embodiment, the upper and lower transfer units 401 and 402 rotate forward or backward to transfer the upper and lower sewing materials MA and MB in the first or second transfer direction A1, respectively. ) (A2), forward or reverse rotation. In addition, the upper and lower conveying units 401 and 402, the upper and lower sewing materials (MA) (MB) are each orthogonal to the first or second conveying direction (A1) (A2) first or In order to transfer in the second correction direction (B1) (B2), it linearly moves in the forward or reverse direction. In this embodiment, the upper and lower conveying units 401 and 402 are configured to include upper and lower conveying rollers 411 and 412, first upper and first lower driving sources 421 and 422, and upper and lower movement. It includes frames 431 and 432, second upper and second lower driving sources 441 and 442, upper and lower ball screws 451 and 452, and upper and lower sliders 461 and 462, respectively.

More specifically, the upper and lower conveying rollers 411 and 412 rotate about upper and lower rotation shafts 411A and 412A, respectively. The upper and lower rotation shafts 411A and 412A are disposed parallel to each other, and may be respectively disposed on an imaginary straight line substantially passing through the backstitch start position p1.

In addition, the first upper and first lower driving sources 421 and 422 move the upper and lower conveying rollers 411 and 412 in a forward or reverse direction about the upper and lower rotation shafts 411A and 412A, respectively. It provides driving force to rotate. That is, the first upper and first lower drive sources 421 and 422 are configured so that the upper and lower sewing materials MA and MB are transported in the first or second transport directions A1 and A2, respectively. Driving force is provided to the upper and lower conveying rollers 411 and 412, respectively. To this end, the first upper and first lower drive sources 421 and 422 are coupled to the upper and lower rotation shafts 411A and 412A, respectively, to rotate them respectively.

The upper and lower rotational shafts 411A and 412A are rotatably supported on the upper and lower moving frames 431 and 432, respectively. In addition, the first upper and first lower driving sources 421 and 422 are coupled to the upper and lower moving frames 431 and 432 . Substantially, the upper and lower moving frames 431 and 432 are linearly moved in the first and second correction directions B1 and B2 by the second upper and second lower driving sources 441 and 442. do.

Next, the second upper and second lower driving sources 441 and 442 linearly move the upper and lower conveying rollers 411 and 412 in a forward or reverse direction parallel to the upper rotating shaft 401A, respectively. provides driving force. Therefore, the second upper and second lower driving sources 441 and 442 have a driving force such that the upper and lower sewing materials MA and MB are transferred in the first or second correction directions B1 and B2, respectively. provides

The upper and lower ball screws 451 and 452 and the upper and lower sliders 461 and 462 apply the driving force of the second upper and second lower driving sources 441 and 442 to the upper and lower moving frames ( 431 and 432, respectively. The upper and lower ball screws 451 and 452 are rotated by the second upper and second lower driving sources 441 and 442, respectively. And the upper and lower sliders 461 and 462 reciprocate along the upper and lower ball screws 451 and 452 while being coupled to the upper and lower moving frames 431 and 432, respectively. , The upper and lower conveying rollers 411 and 412 move in the first and second correction directions B1 and B2.

In this embodiment, the upper transfer unit 401 further includes an upper elevating frame 471 and a third upper driving source 481 . The upper elevating frame 471 is where the second upper driving source 421, the upper ball screw 451, and the upper slider 461 are supported. The third upper driving source 481 provides a driving force so that the upper transfer roller 411 moves up and down. Substantially, the upper moving frame 431 is coupled to the upper slider 461, and the third upper driving source 481 provides a driving force for lifting to the upper lifting frame 471, so that the The entire upper elevating frame 471 including the upper transfer roller 411 moves up and down. The raising and lowering of the upper conveying roller 411 is for selective contact and substantially selective pressing of the upper conveying roller 411 and the upper sewing material MA, by the third upper driving source 481. The upper conveying roller 411 may be in contact with the upper sewing material (MA) or may be spaced apart from the upper sewing material (MA). The raising and lowering of the upper transfer roller 411 is to withdraw the upper sewing material MA, the upper and lower sewing materials MA and MB from the base plate 100. am.

In addition, the lower transfer unit 402 further includes a lower fixing frame 472 . The lower fixing frame 472 is substantially the same as the upper elevating frame 472, but is fixed to the vape plate 100 and does not separately elevate.

On the other hand, the control unit (C), according to the edge position of the upper and lower sewing material (MA) (MB) detected by the upper and lower sensing units (201, 202), the upper and lower sewing material ( Operations of the backstitching unit 300 and the upper and lower transfer units 401 and 402 so that the upper and lower sewing materials MA and MB are sewn along the sewing line L while the MA) (MB) is transported. to control In particular, the control unit (C), the upper and lower transfer unit 401 to transfer the upper and lower sewing material (MA) (MB) in the first or second transfer direction (A1) (A2), respectively 402 is rotated forward or backward, or the upper and lower portions for conveying in a first or second correcting direction (B1) (B2) orthogonal to the first or second conveying direction (A1) (A2), respectively. The transport units 401 and 402 are controlled to linearly move forward or backward.

More specifically, the control unit (C), the upper and lower transfer unit for the transfer of the upper and lower sewing material (MA) (MB) in the first or second transfer direction (A1) (A2) The upper and lower transfer units for forward rotation or reverse rotation of 401 and 402 and transfer of the upper and lower sewing materials MA and MB in the first and second correction directions B1 and B2 (401) is controlled so that the linear movement is alternately performed in the forward or reverse direction of (402). In other words, the control unit (C) controls the operation of transferring the upper and lower sewing materials (MA) (MB) by the stitch interval (g) for stitching and the stitching line (L) at the stitching start position ( It is controlled so that the conveyed operation is alternately repeated so as to be positioned directly below p1).

Here, the 'first conveying direction (A1)' and the 'second conveying direction (A2)' are the upper and lower sewing materials (MA) (MB) by the backstitch unit 300 at the stitch interval (g) Backstitch or, as will be described later, means an upward direction and a downward direction on the drawing in FIG. Therefore, the control unit (C) is the upper and lower conveying unit (MA) (MB) so that the conveying of the upper and lower sewing materials (MA) (MB) in the first conveying direction (A1) is made by the stitch interval (g) ( It will control the operation of 401 and 402, i.e., the number of rotations or the rotation angle of the upper and lower conveying rollers 411 and 412. And the control unit (C) is the upper and lower conveying rollers 411 such that the upper and lower sewing materials (MA) (MB) are conveyed in the first conveying direction (A1) according to the error of the stitching start position. ) will control the rotation of 412.

In addition, 'first correction direction (B1)' and 'second correction direction (B2)' are directions in which the backstitch starting position (p1) is located directly above the seam line (L), in FIG. In the drawing, the right direction and the left direction are respectively meant. Therefore, the control unit (C), the transfer of the upper and lower sewing material (MA) (MB) in the first and second correction directions (B1) (B2) is the upper and lower sewing material (MA) ( The upper and lower sewing materials (MA) detected by the upper and lower position detecting units 201 and 202, substantially the upper and lower sewing materials (MA) (MB) so that sewing of MB) can be performed. The moving distances of the upper and lower conveying rollers 411 and 412 will be controlled according to the position of the rim of MA (MB).

More specifically, the control unit (C), by the upper or lower detection unit (201, 202), the edge of the upper or lower sewing material (MA) (MB) is at the detection position (P) When it is detected that the position is detected, the upper or lower sewing material (MA) (MB) is controlled to be transferred in the first correction direction (B1) so as to be spaced apart from the detection position (P). And the control unit (C), the upper or lower sensing unit (201, 202) when it is detected that the upper or lower sewing material (MA) (MB) is separated from the detection position (P) The upper or lower sewing material (MA) (MB) is controlled to be transferred in the first transfer direction (A1) by the stitch interval (g) by the rotation of the upper or lower transfer unit (401, 402) in . That is, the control unit (C) is the sewing line (L ) is determined to be located directly below the backstitch start position p1, and the upper or lower sewing materials MA and MB are controlled to be transferred as much as the stitch interval g.

In addition, the control unit (C), by the upper or lower detection unit (201, 202), the edge of the upper or lower sewing material (MA) (MB) is not located at the detection position (P) When it is detected, the upper or lower sewing material (MA) (MB) is controlled to be transferred in the second correction direction (B2) so as to move toward the detection position (P). And the control unit (C) detects that the edge of the upper or lower sewing material (MA) (MB) is located at the detection position (P) by the upper or lower detection unit (201, 202) When it is, the upper or lower sewing material (MA) (MB) is controlled to be transported in the first correction direction (B1) so as to be spaced apart from the sensing position (P) again. Next, the control unit (C) detects that the upper or lower sewing material (MA) (MB) is spaced apart from the detection position (P) by the upper or lower detection unit (201, 202). At the time, the upper or lower sewing material (MA) (MB) is transported in the first conveying direction (A1) by the stitch interval (g) by the rotation of the upper or lower conveying unit (401) (402). Control.

In particular, in this embodiment, the control unit (C) controls the stitching completion position (p2) where stitching is completed by the stitching unit 300 by the transfer in the first or second correction directions (B1) (B2). ) and the backstitch starting position (p1) is corrected when it is different from the preset stitch interval (g). That is, as shown in (A) of FIG. 3, the first or second upper or lower conveying rollers 411, 412 by the second upper or second lower driving sources 441, 442 If there is no change in the position of the edge of the upper or lower sewing material (MA) (MB) according to the transfer in the correction direction (B1) (B2) - the edge of the upper or lower sewing material (MA) (MB) is straight In the interval, the upper or lower sewing material (MA) (MB) in order to check the position of the edge of the upper or lower sewing material (MA) (MB) is the first correction direction (B1) or the first and Even if it is transferred in the second correction direction (B1) (B2), the position of the edge of the upper or lower sewing material (MA) (MB) will not change in the first and second correction directions (B1) (B2). In -, the upper or lower sewing material (MA) (MB) is transferred by the upper or lower conveying rollers 411 and 412 in the first conveying direction A1 only by the stitch distance g. Therefore, stitching may be performed at the same interval as the stitch interval g by the backstitch unit 300 .

By the way, as shown in (B) of FIG. 3, when the upper or lower sewing material (MA) (MB) is transferred by a predetermined distance (d) in the first correction direction (B1), then the Even if the upper or lower sewing material (MA) (MB) is transferred by the stitch distance (g) in the first transfer direction (A1), directly below the needle 310, that is, the stitch start position (p1) and the stitch The actual distance g1 between the completion positions p2 exceeds the sweat distance g. Therefore, in this embodiment, in order to correct such an error, when the upper or lower sewing material (MA) (MB) is transferred in the first or second correction direction (B1) (B2), the control The unit (C) transfers the upper or lower sewing material (MA) (MB) by a predetermined distance in the second transfer direction (A2), that is, a distance capable of correcting the above-described error. The rollers 411 and 412 are controlled to rotate in reverse. At this time, the control unit (C) determines the actual distance (d) from the trigonometric function of the sweat interval (g) and the movement distance (d) in the first or second correction directions (B1) and (B2) as the base and the opposite side, respectively. In order to correct the interval g1 and the stitch interval g, the distance that the upper or lower sewing material MA or MB should be transported in the second transport direction A2 is calculated, and the calculated value Therefore, it is possible to control the operation of the first upper or first lower driving source 421, 422 so that the upper or lower sewing material MA or MB is transferred in the second conveying direction A2.

In the embodiment of the present invention configured as described above, as described above, the transfer and stitching according to the rim shape of the upper and lower sewing materials (MA) (MB) can be accurately performed. In particular, in the embodiment of the present invention, while maintaining a state in which the upper and lower conveying rollers 411 and 412 are in contact with the upper and lower sewing materials (MA) (MB), the upper and lower sewing materials (MA) ) (MB) by being transferred according to the shape of the rim, it is possible to prevent the occurrence of wrinkles in the upper and lower sewing materials (MA) (MB). In addition, in the embodiment of the present invention, by correcting the error caused by the transfer according to the edge shape of the upper and lower sewing materials (MA) (MB), more accurate stitching can be achieved.

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: base plate 201, 202: detection unit
300: backstitch unit 400: transfer unit
C: control unit

Claims (9)

The upper and lower sewing materials (MA) (MB) are prepared along a sewing line (L) set to be spaced apart by a predetermined sewing distance (G) from the edge of the upper and lower sewing materials (MA) (MB) stacked up and down. In the sewing device 1 that continuously sews at a set stitch interval (g):
The sewing device 1,
The upper and lower sewing material (MA) (MB) is supported on the upper and lower surfaces, respectively, base plate 100;
Upper and lower sensing units 201 and 202 for detecting the edge positions of the upper and lower sewing materials (MA) (MB);
A stitching unit 300 including a needle 310 for stitching the upper and lower sewing materials MA and MB while moving up and down from the stitching start position p1 to sew along the stitching line L;
In a state where the needle 310 is spaced apart from the upper and lower sewing materials (MA) (MB), the upper and lower sewing materials (MA) (MB) supported on the upper surface of the base plate 100 are transferred, respectively. upper and lower conveying units 401 and 402 which rotate and linearly move in order to do so;
According to the edge position of the upper and lower sewing materials (MA) (MB) detected by the upper and lower detection units (201, 202), the upper and lower sewing materials (MA) (MB) are transported while the sewing line A control unit (C) for controlling the operation of the stitching unit 300 and the upper and lower conveying units 401 and 402 so that the upper and lower sewing materials MA and MB are sewn along (L); Sewing device comprising a.
According to claim 1,
The upper and lower transfer units 401 and 402 rotate forward or backward to transfer the upper and lower sewing materials MA and MB in the first and second transfer directions A1 and A2, respectively. Sewing device that linearly moves in the forward or reverse direction to feed in the first or second correction directions (B1) (B2) orthogonal to the first or second conveyance directions (A1) (A2), respectively.
According to claim 2,
The upper and lower sensing units 201 and 202 are configured to perform the stitch spacing (from the backstitch start position p1) in the second transfer direction B2 and in the first or second correction directions B1 and B2. g) and sewing device for detecting whether the edges of the upper and lower sewing materials (MA) (MB) are positioned at the sensing position (P) spaced apart by the sewing distance (G), respectively.
According to claim 3,
The control unit (C) is the upper and lower conveying units 401, 402 for conveying the upper and lower sewing materials (MA) (MB) in the first or second conveying directions (A1) (A2). The upper and lower transfer units 401, 402 for forward rotation or reverse rotation of ) and transfer of the upper and lower sewing materials (MA) (MB) in the first and second correction directions (B1) (B2) ) Sewing device that controls linear movement in the forward or reverse direction so that it is alternately made.
According to claim 3,
When the control unit (C) detects that the upper or lower edge of the upper or lower sewing material (MA) (MB) is located at the detection position (P) by the upper or lower detection unit (201, 202) , After the upper or lower sewing material (MA) (MB) is transferred in the first correction direction (B1) so as to be spaced apart from the detection position (P) by the upper or lower detection unit (201, 202) The upper or lower sewing material (MA) (MB) by the rotation of the upper or lower transfer unit 401, 402 at the time when it is detected that the upper or lower sewing material (MA) (MB) is separated from the detection position (P) ( A sewing device for controlling MA) (MB) to be conveyed in the first conveying direction (A1) by the stitch interval (g).
According to claim 3,
The control unit (C) detects that the edge of the upper or lower sewing material (MA) (MB) is not located at the detection position (P) by the upper or lower detection unit (201, 202) When it is, the upper or lower sewing material (MA) (MB) is transferred in the second correction direction (B2) so as to move toward the detection position (P), and the upper or lower detection unit (201, 202) When it is detected that the edge of the upper or lower sewing material (MA) (MB) is located at the detection position (P) by the upper or lower sewing material (MA) (MB) to be spaced apart from the detection position (P) again ) is transferred in the first correction direction (B1), and the upper or lower sewing material (MA) (MB) is spaced apart from the detection position (P) by the upper or lower detection unit (201, 202)) At the time when it is detected that the upper or lower conveying unit 401 or 402 rotates, the upper or lower sewing material MA or MB moves in the first conveying direction A1 by the stitch distance g. Sewing device that controls to be transferred to.
According to claim 5 or 6,
The control unit (C), when the upper or lower sewing material (MA) (MB) is transferred in the first or second correction direction (B1) (B2), the backstitch by the backstitch unit 300 is completed. The upper or lower sewing is performed by reverse rotation of the upper or lower conveying unit 401 or 402 so that the distance between the backstitch completion position p2 and the backstitch start position p1 is corrected by the stitch distance g. Sewing device for controlling the water (MA) (MB) to be transferred in the second transfer direction (A2).
According to claim 1,
The upper and lower transfer units 401 and 402,
upper and lower conveying rollers 411 and 412 respectively rotating around upper and lower rotation shafts 411A and 412A;
The upper and lower conveying rollers 411 and 412 are the upper and lower rotating shafts for conveying the upper and lower sewing materials MA and MB in the first or second conveying directions A1 and A2. (411A) first upper and first lower drive sources (421) (422) providing driving force to rotate in a forward or reverse direction about (412A), respectively; and
For the transfer of the upper and lower sewing materials (MA) (MB) in the first or second correction directions (B1) (B2), the upper and lower conveying rollers 411 and 412 are the upper rotating shafts 411A ) second upper and second lower driving sources 441 and 442 providing driving forces to linearly move in forward or reverse directions parallel to ); Sewing device comprising a.
According to claim 8,
The upper conveying unit 401 is a third upper driving source 481 that provides a driving force so that the upper conveying roller 411 moves up and down for selective contact between the upper conveying roller 411 and the upper sewing material MA. ) Sewing device further comprising a.

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