KR102620459B1 - 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 a preset stitch interval along a sewing line that is set to be spaced apart by a preset sewing interval from the edge of the upper and lower sewing materials that are stacked up and down. In the sewing device, the sewing device includes: a base plate on which the upper and lower sewing materials are supported on the upper and lower surfaces, respectively; Upper and lower sensing units that detect the edge positions of the upper and lower sewing materials; A lockstitch unit including a needle that sews the upper and lower sewing materials while moving up and down from a lockstitch start position to sew along the sewing line; Upper and lower transfer units that rotate and move linearly to transfer the upper and lower sewing materials supported on the upper surface of the base plate, respectively, with the needle spaced apart from the upper and lower sewing materials; The upper and lower sewing materials are transferred according to the edge positions of the upper and lower sewing materials detected by the upper and lower sensing units, and the stitching unit and the upper and lower conveying so that the upper and lower sewing materials are sewn along the sewing line. a control unit that controls the operation of the unit; Includes.

Description

Sewing device{DEVICE AND METHOD FOR STITCHING}

The present invention relates to sewing devices.

In general, in the case of sewing, two sewing materials, for example, two sewing materials of the same shape, are placed so that they overlap, and the edges of the two sewing materials are fed and sewn so that they are aligned with each other, or continuously sewn to the edge of the mat. This is done by sewing the supplied border members. Recently, various methods have been proposed to automate this.

Referring to prior patent documents, conventionally, a sensing unit detects the edge shape of the sewing material, and the sewing material is transported accordingly and stitching is performed. More specifically, in the related art, in a state in which a plurality of upper rollers and a plurality of lower rollers rotating around a horizontal rotation axis are positioned to face each other up and down, each outer peripheral surface is used to sew the upper and lower surfaces of the upper sewing material. It rotates in contact with the lower surface of the water, and each of the upper and lower rollers rotates at different rotation speeds, so that the sewing material is conveyed while its direction changes depending on the shape of its edge.

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

First, in the prior art, the edge position of the sewing material is detected, and the sewing material is fed and stitched accordingly. However, in the prior art literature, the specific method, especially in the case of sewing material with repeated straight lines and curves, a specific configuration for selectively transporting the sewing material in a straight line or curve, and a specific configuration for transporting and stitching along the edge of the sewing material This is not disclosed at all. In particular, when the sewing material is rotated and then transported, the straight line distance between the previous sewing position and the sewing position after the rotation and transportation of the sewing material becomes an interval that exceeds the actual stitch spacing. However, in the past, no technology to correct this has been proposed at all.

Meanwhile, in the prior art, the sewing material is moved in a straight line by a presser foot that normally reciprocates in a predetermined trajectory, and the rotation speed of the upper roller in contact with the upper surface of the upper sewing material and the lower roller when in contact with the lower surface of the lower sewing material are adjusted. , it can be transported with its direction variable depending on its edge shape. However, in the case of relatively thin sewing material, wrinkles may occur as only a part of the sewing material in contact with the presser foot or roller is transferred or rotated during the process of straight movement by the presser foot or rotation by the roller, which ultimately leads to wrinkles. This causes problems in which accurate stitching cannot be achieved.

Furthermore, in the prior art, the sewing material is transported and rotated by each configuration. Therefore, in the related art, the number of parts for transporting and rotating the sewing material increases, and its control also becomes complicated.

Japanese Patent Publication No. 1995-096091 (name: sewing device for the peripheral part of the rug) Republic of Korea Patent No. 2093407 (name: Mat sewing device) Republic of Korea Patent No. 2110255 (name: Mat sewing device) Republic of Korea Public Utility Model No. 2000-0019309 (Name: Quilting) Republic of Korea Patent No. 1354512 (Name: Sewing machine with border fabric binder attached) Republic of Korea Patent No. 1558155 (name: vehicle mat structure)

The purpose of the present invention is to solve the problems caused by the prior art as described above. The purpose of the present invention is to provide a sewing device configured to accurately transport and sew at regular intervals according to the edge shape of the sewing material. It is provided.

The purpose of the present invention is to provide a sewing device configured to enable accurate transfer and stitching, especially in the case of sewing material made of thin material.

Another object of the present invention is to provide a sewing device configured to allow sewing materials to be transported and sewn more simply.

One aspect of the sewing device according to an embodiment of the present invention for achieving the above-described object is to sew the upper and lower sewing materials along a sewing line that is set to be spaced apart from the edge of the upper and lower sewing materials by a preset sewing interval. In the sewing device for continuously sewing at preset 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 sensing units that detect the edge positions of the upper and lower sewing materials; A lockstitch unit including a needle that sews the upper and lower sewing materials while moving up and down from a lockstitch start position to sew along the sewing line; Upper and lower transfer units that rotate and move linearly to transfer the upper and lower sewing materials supported on the upper surface of the base plate, respectively, with the needle spaced apart from the upper and lower sewing materials; The upper and lower sewing materials are transferred according to the edge positions of the upper and lower sewing materials detected by the upper and lower sensing units, and the stitching unit and the upper and lower conveying so that the upper and lower sewing materials are sewn along the sewing line. 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 reverse to transfer the upper and lower sewing materials in the first or second transfer directions, respectively, or move the upper and lower sewing materials in the first or second transfer directions, respectively. It moves straight in the forward or reverse direction to transfer in the first or second compensation direction orthogonal to the transfer direction.

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

In one aspect of the embodiment of the present invention, the control unit rotates the upper and lower sewing materials forward or reversely for transporting the upper and lower sewing materials in the first or second transport direction and the upper and lower sewing materials. The upper and lower transfer units are controlled to alternately move in a straight line in the forward or reverse direction to transfer water in the first and second correction directions.

In one aspect of the embodiment of the present invention, when the control unit detects that the edge of the upper or lower sewing material is located at the sensing position by the upper or lower sensing unit, the control unit moves the upper or lower portion to be spaced from the sensing position. After the sewing material is transferred in the first correction direction, at the point when the upper or lower sensing unit detects that the upper or lower sewing material is separated from the sensing position, the upper or lower Or, 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, when the control unit detects that the edge of the upper or lower sewing material is not located at the sensing position by the upper or lower sensing unit, the upper or lower sensing unit moves toward the sensing position. Or, when the lower sewing material is transported in the second correction direction and the edge of the upper or lower sewing material is detected by the upper or lower sensing unit as being located at the sensing position, the upper or lower sewing material is again spaced from the sensing position. After the sewing material is transferred in the first correction direction, at the point when the upper or lower sensing unit detects that the upper or lower sewing material is separated from the sensing position, the upper or lower Or, 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, when the upper or lower sewing material is transferred in the first or second correction direction, the control unit controls the position between the stitching completion position where stitching is completed by the stitching unit and the stitching start position. 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 gap between the stitches is corrected to the stitch gap.

In one aspect of the embodiment of the present invention, the upper and lower transfer units include upper and lower transfer rollers rotating about upper and lower rotation axes, respectively; The first upper and lower transport rollers provide driving force to rotate in the forward or reverse direction about the upper and lower rotation axes, respectively, in order to transport the upper and lower sewing materials in the first or second transport direction. 1 lower drive source; And a second upper and lower conveying force that provides driving force so that the upper and lower conveying rollers move linearly in the forward or reverse direction parallel to the upper rotation axis, respectively, in order to convey the upper and lower sewing materials in the first or second correction direction. 2Lower drive source; Includes.

In one aspect of the embodiment of the present invention, the upper transfer unit further includes a third upper drive source that provides driving force to raise and lower the upper transfer roller for selective contact with the upper transfer roller and the upper sewing material.

According to the sewing device according to an embodiment of the present invention, the following effects can be expected.

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

Additionally, in an embodiment of the present invention, the transfer according to the edge shape of the sewing material is performed by linear movement rather than rotation of the transfer unit. In particular, in this embodiment, movement and position correction of the sewing material are performed while the transfer unit is in contact with the surface of the sewing material, so wrinkles may appear in the sewing material due to intermittent movement between the transfer unit and the sewing material, especially , Even if the sewing material is made of a relatively thin material, phenomena such as wrinkles in the sewing material can be prevented.

Therefore, according to the embodiment of the present invention, sewing according to a more accurate edge shape can be expected for relatively thin sewing material.

And in an embodiment of the present invention, the sewing material is transferred in the first or second transfer direction or in the first or second correction direction by rotation and linear movement of the transfer unit. Therefore, according to the embodiment of the present invention, transport and stitching according to the edge shape of the sewing material can be performed 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 parts of an embodiment of the present invention.
Figure 3 is a plan view schematically showing the process of transporting and sewing sewing material according to the edge shape of the sewing material in an embodiment of the present invention.

Hereinafter, the configuration of an embodiment of a sewing device according to an embodiment of the present invention will be described in more detail with reference to the attached 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, and Figure 3 is a sewing material transport and sewing material according to the edge shape of the sewing material in an embodiment of the present invention. This is a plan view that schematically shows the process of stitching.

First, referring to FIGS. 1 and 2, the sewing device 1 according to an embodiment of the present invention includes a base plate 100, upper and lower sensing units 201 and 202, a lockstitch unit 300, and an upper and a lower transfer unit (401) (402) and a control unit (C). In particular, the sewing device 1 operates the upper and lower sewing materials (MA) (MB) along a sewing line (L) that is set to be spaced apart from the edges of the upper and lower sewing materials (MA) (MB) by a preset sewing gap (G). The sewing material (MA) (MB) is continuously sewn at a preset 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 sewing line (L) while being transported while being supported on the upper and lower surfaces of the base plate 100, respectively.

Meanwhile, in this embodiment, a stitch opening 110 is formed in the base plate 100. The stitch opening 110 is formed by cutting a portion of the base plate 100. Substantially, the lockstitch opening 110 is where the needle 310, which will be described later, passes through in a lowered state for lockstitching.

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

Here, the 'sensing position (P)', as will be described later, is spaced apart from the stitch start position (p1) by the stitch gap (g) in the second transfer direction (A2), and is spaced apart from the stitch start position (p1) by the second stitch distance (g). It can be defined as a position spaced apart by the sewing gap (G) in the correction direction (B2). And the upper and lower sensing units 201 and 202 are optical sensors that respectively detect whether the upper and lower sewing materials (MA) (MB) are located at the sensing position (P) by emitting and receiving light. can be used.

The stitching unit 300 stitches the upper and lower sewing materials (MA) (MB) along the sewing line (L). In this embodiment, the lockstitch unit 300 includes a needle 310 that sews the upper and lower sewing materials (MA) (MB) along the sewing line (L) while moving up and down. Substantially, the upper and lower sewing materials (MA) (MB) are sewn by thread while the needle 310 rises and lowers and repeats insertion and separation into the upper and lower sewing materials (MA) (MB). And the needle 310, while descending, sequentially penetrates the upper sewing material (Ma), the stitching opening 110, and the lower sewing material (Ma) (Mb). Hereinafter, the position directly below the needle 310, that is, the position where stitching is performed by the needle 310, is referred to as the stitching start position p1.

Next, the upper and lower transfer units 401 and 402 are operated on the upper and lower surfaces of the base plate 100 with the needles 310 spaced apart from the upper and lower sewing materials (MA) (MB). It rotates and moves linearly to transport the upper and lower sewing materials (MA) and (MB) respectively supported on the lower surface. In particular, in this embodiment, the upper and lower transfer units 401 and 402 rotate forward or reverse to transfer the upper and lower sewing materials MA and MB, respectively, in the first or second transfer direction A1. ) Rotate forward or reverse to transfer to (A2). In addition, the upper and lower transfer units 401 and 402 are provided with a first or lower sewing material (MA) (MB) perpendicular to the first or second transfer direction (A1) (A2), respectively. It moves straight in the forward or reverse direction to transfer it to the second correction direction (B1) (B2). In this embodiment, the upper and lower transport units 401 and 402 include upper and lower transport rollers 411 and 412, first upper and first lower drive sources 421 and 422, and upper and lower transport units 401 and 402, respectively. It includes frames 431 and 432, second upper and second lower drive 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 transport rollers 411 and 412 rotate around the upper and lower rotation axes 411A and 412A, respectively. The upper and lower rotation axes 411A and 412A are arranged parallel to each other, and may each be arranged on a virtual straight line that substantially passes through the stitching start position p1.

And the first upper and first lower drive sources 421 and 422 allow the upper and lower transport rollers 411 and 412 to rotate in the forward or reverse direction, respectively, around the upper and lower rotation axes 411A and 412A. Provides driving force to rotate. That is, the first upper and first lower drive sources 421 and 422 are configured to transport the upper and lower sewing materials (MA) (MB) in the first or second transfer directions (A1) (A2), respectively. Driving force is provided to the upper and lower transport rollers 411 and 412, respectively. To this end, the first upper and first lower drive sources 421 and 422 are respectively coupled to the upper and lower rotation axes 411A and 412A to rotate them, respectively.

The upper and lower rotation axes 411A and 412A are rotatably supported on the upper and lower moving frames 431 and 432, respectively. Additionally, the first upper and first lower drive 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 move linearly 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 allow the upper and lower transport rollers 411 and 412 to move linearly in the forward or reverse direction, respectively, parallel to the upper rotation axis 401A. Provides driving force. Therefore, the second upper and second lower drive sources 441 and 442 provide driving force so that the upper and lower sewing materials (MA) (MB) are transported in the first or second correction direction (B1) (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 drive sources 441 and 442 to the upper and lower moving frames ( Deliver to 431)(432) respectively. The upper and lower ball screws 451 and 452 are rotated by the second upper and second lower drive sources 441 and 442, respectively. And the upper and lower sliders 461 and 462, while coupled to the upper and lower moving frames 431 and 432, reciprocate along the upper and lower ball screws 451 and 452. , the upper and lower transport 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 lifting and lowering frame 471 and a third upper driving source 481. The upper lifting frame 471 is where the second upper driving source 421, upper ball screw 451, and upper slider 461 are supported. The third upper drive source 481 provides driving force to raise and lower the upper transfer roller 411. Substantially, the upper moving frame 431 is coupled to the upper slider 461, and the third upper driving source 481 provides driving force for raising and lowering the upper lifting frame 471, The entire upper lifting and lowering frame 471 including the upper transfer roller 411 is raised and lowered. The raising and lowering of the upper transport roller 411 is for selective contact and substantially selective pressing of the upper transport roller 411 and the upper sewing material (MA) by the third upper drive source 481. The upper transfer roller 411 may be in contact with the upper sewing material (MA) or may be spaced apart from the upper sewing material (MA). This raising and lowering of the upper transport roller 411 is to withdraw the upper sewing material (MA) and the substantially sewn upper and lower sewing materials (MA) (MB) from the base plate 100. am.

In addition, the lower transfer unit 402 further includes a lower fixed frame 472. The lower fixing frame 472 is substantially the same as the upper raising and lowering frame 472, but is fixed to the bape plate 100 and does not move up and down separately.

Meanwhile, the control unit (C) controls the upper and lower sewing materials ( Operation of the stitching unit 300 and the upper and lower transfer units 401 and 402 so that the upper and lower sewing materials (MA) (MB) are sewn along the sewing line (L) while the MA) (MB) is transferred. control. In particular, the control unit (C) operates the upper and lower transfer units 401 to transfer the upper and lower sewing materials (MA) (MB) in the first or second transfer directions (A1) (A2), respectively. (402) rotates forward or backward, or transfers the upper and lower parts in the first or second compensation directions (B1) (B2) orthogonal to the first or second transfer directions (A1) (A2), respectively. The transfer units 401 and 402 are controlled to move linearly in the forward or reverse direction.

More specifically, the control unit (C) is the upper and lower transfer unit for transfer of the upper and lower sewing materials (MA) (MB) in the first or second transfer direction (A1) (A2). The upper and lower transfer units for forward or reverse rotation of (401) (402) and transfer of the upper and lower sewing materials (MA) (MB) in the first and second correction directions (B1) (B2) It is controlled so that linear movements are made alternately in the forward or reverse direction of (401) and (402). In other words, the control unit (C) controls the operation of transporting the upper and lower sewing materials (MA) (MB) by the stitch gap (g) for stitching and the stitching line (L) at the stitching start position ( It is controlled so that the transfer operation is alternately repeated so that it is located directly below p1).

Here, the 'first transfer direction (A1)' and 'second transfer direction (A2)' refer to the stitch spacing (g) between the upper and lower sewing materials (MA) (MB) by the stitching unit 300. As will be described later, the direction in which stitching is carried for correction of the stitching start position refers to the upward and downward directions in the drawing in FIG. 2, respectively. Therefore, the control unit (C), the upper and lower transfer units ( The operation of 401 and 402, that is, the rotation speed or rotation angle of the upper and lower transport rollers 411 and 412, will be controlled. And the control unit (C) controls the upper and lower transport rollers 411 so that the upper and lower sewing materials (MA) (MB) are transferred in the first transport direction (A1) according to the error of the stitching start position. ) will control the rotation of (412).

In addition, the 'first correction direction (B1)' and the 'second correction direction (B2)' are the conveying directions so that the stitching start position (p1) is located directly above the sewing line (L), in FIG. 2 In the drawing, it refers to the right direction and left direction, respectively. Therefore, the control unit (C) transfers the upper and lower sewing materials (MA) (MB) in the first and second correction directions (B1) (B2) to the upper and lower sewing materials (MA) ( The edge shape of the upper and lower sewing material (MA) (MB), substantially the upper and lower sewing material (MB) detected by the upper and lower position detection units 201 and 202, so that sewing of MB) can be performed. The moving distance of the upper and lower transport rollers 411 and 412 will be controlled to be achieved according to the position of the edge of MA) (MB).

More specifically, the control unit (C) detects the edge of the upper or lower sewing material (MA) (MB) at the sensing position (P) by the upper or lower sensing unit (201) (202). When detected as being positioned, 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 sensing position (P). And the control unit (C) detects that the upper or lower sewing material (MA) (MB) is separated from the sensing position (P) by the upper or lower sensing unit (201) (202). By rotating the upper or lower transfer units 401 and 402, the upper or lower sewing material (MA) (MB) is controlled to be transferred in the first transfer direction (A1) by the amount of the stitch gap (g). . That is, the control unit (C) detects the edge of the upper or lower sewing material (MA) (MB) by the upper or lower sensing unit (201) (202), and then detects the sewing line (L) at the point where it is separated. ) is determined to be located directly below the stitching start position (p1) and is controlled to transport the upper or lower sewing material (MA) (MB) by the stitch spacing (g).

In addition, 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 sensing unit (201) (202). When 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 sensing position (P) by the upper or lower detection unit (201) (202). When this happens, the upper or lower sewing material (MA) (MB) is controlled to be transferred in the first correction direction (B1) so that it is separated from the sensing position (P) again. Next, the control unit (C) detects that the upper or lower sewing material (MA) (MB) is spaced from the sensing position (P) by the upper or lower sensing unit (201) (202). At this point, the upper or lower sewing material (MA) (MB) is transferred in the first transfer direction (A1) by the rotation of the upper or lower transfer unit (401) (402) by the stitch gap (g). Control.

In particular, in this embodiment, the control unit (C) is set to a stitching completion position (p2) where stitching is completed by the stitching unit 300 by transfer in the first or second correction direction (B1) (B2). ) and the stitch start position (p1) is corrected when the interval is different from the preset stitch interval (g). That is, as shown in (A) of FIG. 3, the first or second upper or lower transport rollers 411 and 412 are driven by the second upper or second lower drive sources 441 and 442. When there is no change in the position of the edge of the upper or lower sewing material (MA) (MB) according to transfer in the correction direction (B1) (B2) - the edge of the upper or lower sewing material (MA) (MB) is straight In the section, the upper or lower sewing material (MA) (MB) is moved in the first correction direction (B1) or the first and Even if it is transported 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 only as much as the stitch gap (g) in the first transfer direction (A1) by the upper or lower transfer rollers 411 and 412. Therefore, the stitching unit 300 can perform stitching at an interval equal to the stitch spacing (g).

However, as shown in (B) of FIG. 3, when the upper or lower sewing material (MA) (MB) is transported a predetermined distance (d) in the first correction direction (B1), then the Even if the upper or lower sewing material (MA) (MB) is transferred as much as the stitch gap (g) in the first transfer direction (A1), it is stitched directly below the needle 310, that is, at the stitch start position (p1). The actual gap g1 between the completion positions p2 exceeds the stitch gap 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) so that it is transferred a predetermined distance in the second transfer direction (A2), that is, a distance that can correct the above-mentioned error. The rollers 411 and 412 are controlled to rotate in reverse. At this time, the control unit (C) calculates the actual stitch gap (g) and the movement distance (d) in the first or second correction direction (B1) (B2) from a trigonometric function with the base and the opposite side, respectively. Calculate the distance that the upper or lower sewing material (MA) (MB) must be transferred in the second transfer direction (A2) in order to correct the gap (g1) and the stitch gap (g), and add to the calculated value Therefore, the operation of the first upper or first lower drive source 421 and 422 can be controlled so that the upper or lower sewing material (MA) (MB) is transferred in the second transfer direction (A2).

In the embodiment of the present invention configured in this way, as described above, conveyance and stitching according to the edge shape of the upper and lower sewing materials (MA) (MB) can be accurately performed. In particular, in an embodiment of the present invention, the upper and lower transport rollers 411 and 412 maintain a state in contact with the upper and lower sewing materials (MA) (MB), and the upper and lower sewing materials (MA) ) By carrying out the transfer according to the shape of the edge of (MB), the occurrence of wrinkles in the upper and lower sewing materials (MA) (MB) can be prevented. In addition, in an embodiment of the present invention, errors caused by transport according to the edge shape of the upper and lower sewing materials (MA) (MB) are corrected, so that more accurate stitching can be achieved.

Within the scope of the basic technical idea of the present invention, many other modifications are possible for 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: sensing unit
300: lockstitch unit 400: transfer unit
C: Control unit

Claims (9)

The upper and lower sewing materials (MA) (MB) are sewn along a sewing line (L) that is set to be spaced apart from the edge of the upper and lower sewing materials (MA) (MB) by a preset sewing gap (G). In the sewing device (1) that continuously sews at a set stitch interval (g):
The sewing device 1,
A base plate (100) on which the upper and lower sewing materials (MA) (MB) are supported on its upper and lower surfaces, respectively;
Upper and lower sensing units 201 and 202 that detect the edge positions of the upper and lower sewing materials (MA) (MB);
A stitching unit 300 including a needle 310 that sews the upper and lower sewing materials (MA) (MB) while rising and falling at the stitching start position (p1) in order to sew along the sewing 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 respectively transferred. upper and lower transfer units 401 and 402 that rotate and move linearly to
The upper and lower sewing materials (MA) (MB) are transferred according to the edge positions of the upper and lower sewing materials (MA) (MB) detected by the upper and lower sensing units 201 and 202, thereby moving the sewing line. A control unit (C) that controls the operation of the stitching unit 300 and the upper and lower transfer units 401 and 402 so that the upper and lower sewing materials (MA) (MB) are sewn along (L); Including,
The upper and lower transfer units 401 and 402,
Upper and lower transfer rollers 411 and 412 respectively rotating around the upper and lower rotation axes 411A and 412A;
In order to transport the upper and lower sewing materials (MA) (MB) in the first or second transport direction (A1) (A2), the upper and lower transport rollers 411 and 412 are connected to the upper and lower rotating shafts. First upper and first lower drive sources 421 and 422 that provide driving force to rotate in the forward or reverse direction, respectively, around (411A) (412A); and
In order to transfer the upper and lower sewing materials (MA) (MB) in the first or second correction direction (B1) (B2), the upper and lower transfer rollers 411 and 412 are connected to the upper rotation shaft 411A. ) second upper and second lower drive sources 441 and 442 that provide driving force to move linearly in the forward or reverse direction, respectively, parallel to ); A sewing device comprising a.
According to claim 1,
The upper and lower transfer units 401 and 402 rotate forward or reverse to transfer the upper and lower sewing materials (MA) (MB) in the first or second transfer direction (A1) (A2), respectively. A sewing device that moves linearly in the forward or reverse direction to transfer the sewing device in a first or second correction direction (B1) (B2) orthogonal to the first or second transfer direction (A1) (A2), respectively.
According to claim 2,
The upper and lower sensing units 201 and 202 are connected to the stitch gap (B2) from the stitching start position (p1) to the second transfer direction (A2) and the first or second correction direction (B1) (B2). g) and a sewing device that detects whether the edges of the upper and lower sewing materials (MA) (MB) are located at a sensing position (P) spaced apart by the sewing gap (G).
According to claim 3,
The control unit (C) is the upper and lower transfer unit 401 (402) for transferring the upper and lower sewing material (MA) (MB) in the first or second transfer direction (A1) (A2). ) and the upper and lower transfer units 401 and 402 for forward or reverse rotation and transfer of the upper and lower sewing materials (MA) (MB) in the first and second correction directions (B1) (B2). ) A sewing device that controls linear movement to occur alternately in the forward or reverse direction.
According to claim 3,
When the control unit (C) detects that the edge of the upper or lower sewing material (MA) (MB) is located at the sensing position (P) by the upper or lower sensing unit (201) (202), , after the upper or lower sewing material (MA) (MB) is transferred in the first correction direction (B1) to be spaced apart from the sensing position (P) by the upper or lower sensing unit (201) (202) At the point when the upper or lower sewing material (MA) (MB) is detected to be separated from the sensing position (P), the upper or lower sewing material ( A sewing device that controls MA) (MB) to be transferred in the first transfer direction (A1) by the stitch spacing (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 the upper or lower sewing material (MA) (MB) is transferred in the second correction direction (B2) to move toward the sensing position (P), the upper or lower sensing unit (201) (202) When the edge of the upper or lower sewing material (MA) (MB) is detected to be located at the sensing position (P), the upper or lower sewing material (MA) (MB) is separated from the sensing position (P) again. ) is transferred in the first correction direction (B1), the upper or lower sewing material (MA) (MB) is separated from the sensing position (P) by the upper or lower sensing unit (201) (202)) At the point when it is detected that the upper or lower sewing material (MA) (MB) is rotated by the upper or lower transfer unit (401) (402) in the first transfer direction (A1) by the stitch gap (g) A sewing device that is controlled to be transported to .
The method of 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 stitching is completed by the stitching unit 300. The upper or lower sewing is performed by reverse rotation of the upper or lower transfer units 401 and 402 so that the gap between the stitch completion position (p2) and the stitch start position (p1) is corrected to the stitch spacing (g). A sewing device that controls water (MA) (MB) to be transported in the second transport direction (A2).
delete According to claim 1,
The upper transfer unit 401 is a third upper drive source 481 that provides driving force to raise and lower the upper transfer roller 411 for selective contact between the upper transfer roller 411 and the upper sewing material (MA). ) A sewing device further comprising:

Images