JP2007000501A - Method of embroidery, and embroidery sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To sew a cord-like material by a zigzag stitch of a regular shape with good appearance without dropping a needle on a cord at the curved part of a sewing line. <P>SOLUTION: The cord C is guided to a needle drop point with a guide 16. The guide 16 is swung to the right and left on this side of the needle drop point P, and a needle bar 10 is rotated around the axis of the needle bar 10. Thus, the zigzag stitch S is formed without stabbing the needle into the cord C, and the cord C is sewn along a sewing line L by the zigzag stitch S. Sewing widths W1 and W2 of the guide 16 on the right and left of the sewing line L are set separately, and the set sewing widths W1 and W2 are registered in connection with the number of stitches. At the curved part Lb where the rotary angle θ of the guide 16 exceeds 30°e.g., the guide 16 is swung toward the inside of the curved part Lb more than toward the outside to let the cord C escape from the needle drop point P. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an embroidery method and an embroidery sewing machine in which a string-like material such as a cord or a tape is sewn to a work cloth by zigzag stitches.

  Conventionally, as shown in FIGS. 10A and 10B, the cord C is guided to the needle drop point P of the sewing machine with a cylindrical guide 81, and the guide 81 has the same runout width W before the needle drop point P. A method is known in which the zigzag stitch S is continuously formed on the work cloth without the needle 82 being pierced into the cord C by swinging left and right, and the cord C is sewn along the sewing line L at the zigzag stitch S. ing. Further, as shown in FIG. 10C, in the bending portion Lz of the sewing line L, the guide 81 is turned around the axis of the needle bar 83 at an angle θ1 corresponding to the curvature of the bending portion Lz, and the cord C is bent. A method of sewing along Lz is also known. According to the embroidery method using the zigzag stitch, the needle 82 does not penetrate the cord C, so that the material can be processed without damaging the material, and the embroidery material can be made of wire, bead cord, etc. There is an advantage that a hard material can be used.

Patent Document 1 describes an embroidery sewing machine that uses separate motors for a zigzag swinging mechanism that swings the guide 81 left and right and a turning mechanism that turns the guide 81 around the axis of the needle bar 83. Yes. Patent Document 2 discloses an embroidery sewing machine configured such that a staggered lever attached with a guide 81 is reciprocally rotated by a motor, and the swing width W of the guide 81 can be changed according to the thickness of the code C by controlling the rotational speed of the motor. Is described.
JP-A-8-299639 Japanese Patent No. 3145469

  However, according to the conventional embroidery method, the needle 82 sometimes falls on the cord C at the curved portion Lz of the sewing line L. This is likely to occur when a large tension is applied to the cord C due to complex factors such as the tension of the bobbin that supplies the cord C, the frictional resistance between the cord C and the guide 81, and the swing width of the guide 81. In particular, as shown in FIG. 11A, when the guide 81 is turned at a large angle (θ2> 30 °) in order to sew the cord C along the curved portion Lz having a large curvature, the guide 81 is bent to the curved portion. When shaken inward of Lz, the cord C cannot escape from the needle drop point P, and the needle 82 pierces the cord C. For this reason, the code C is sewn with an irregularly shaped zigzag stitch S, and the appearance of the embroidery pattern is deteriorated. Further, as shown in FIG. 11 (b), when the bead cord C is greatly curved and sewn, there is a problem that the needle 82 collides with the bead.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to embroider a string-like material with a staggered stitch having a regular shape without dropping a needle on a cord at a curved portion of a sewing line and an embroidery method To provide a sewing machine.

  In order to solve the above-described problems, the embroidery method of the present invention guides a string-like material to a needle drop point by a guide, swings the guide to the left and right of the sewing line before the needle drop point, and the axis of the needle bar. By turning the guide around, the zigzag stitch is formed on the work cloth without piercing the needle into the string-like material, and the zigzag stitch is used to sew the string-like material along the curved portion of the sewing line. The guide is characterized in that the guide is swung largely inward from the outside of the bending portion in the bending portion.

In the above embroidery method, preferably, the following means can be employed.
(1) When editing the embroidery pattern data, the swing width of the guide is set separately for the right side and the left side of the sewing line, and the curved portion where the turning angle of the guide exceeds a predetermined value is inside the curved portion. Set the swing width to be larger than the outer swing width.
(2) When editing the embroidery pattern data, register the left and right deflection width of the guide in association with the needle number information in the embroidery pattern data.
(3) The bending portion to which the present invention is applied is preferably a bending portion in which the turning angle of the guide exceeds a predetermined value. Here, the turning angle refers to the angle at which the guide turns for each needle around the axis of the needle bar, and the tangent to the sewing line L for each needle as shown in the turning angle θ in FIG. Appears as a relative difference. The predetermined value is preferably set to 15 °, more preferably 30 °.

  The embroidery sewing machine of the present invention includes a guide for guiding a cord-like material such as a cord or tape to a needle drop point, a staggered swing mechanism for swinging the guide to the left or right of the sewing line before the needle drop point, and an axis around the needle bar axis. Embroidery with a swivel mechanism that swivels the guide, forming a staggered stitch on the work cloth without piercing the needle into the string-like material, and sewing the string-like material on the work cloth along the sewing line by the staggered stitch The sewing machine is equipped with a setting device that sets the swing width of the guide by the staggered swing mechanism. The setting device has setting means for separately setting the swing width on the right side and the left swing width from the sewing line, Registration means for registering the deflection width in association with the number of stitches is provided.

  In addition, although it does not specifically limit as a string-shaped material, Wire materials, string materials, or strips, such as an electric heating cord, a decoration tape, an electric wire, a wire, a rope, a rubber string, a ribbon, can be illustrated. Although it does not specifically limit as a guide (guide member), The member provided with the pipe-shaped or ring-shaped member provided with the guide hole which lets a wire and a string material pass, or the member provided with the guide slit which passes a strip | belt material etc. can be illustrated. Bobbins, reels, cases and other members can be used to supply the string-like material.

  According to the embroidery method of the present invention, since the guide is swung more inward than the outside of the bending portion at the bending portion, even when the string-like material is bent with a large curvature, the needle is not dropped on the string-like material. The string-like material can be sewn with a regular zigzag stitch with a good appearance.

  According to the embroidery sewing machine of the present invention, the guide swing width is set separately on the left and right sides of the sewing line, and the set left and right swing widths are registered in association with the number of stitches, so according to the shape of each part of the sewing line, The guide can be swung to the right and left with an appropriate swing width.In particular, in a curved portion where the turning angle of the guide exceeds a predetermined value, the guide is swung more inward than the outside of the curved portion, and the needle is There is an effect that it is possible to sew the string-like material with a staggered stitch having a regular shape without dropping it.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 9, in the embroidery method of this embodiment, a string-like material such as a cord C or tape is guided to the needle drop point P by the guide 16. The guide 16 is swung to the left and right in a direction intersecting the sewing line L before the needle drop point P, and is turned around the axis of the needle bar 10. Then, the staggered stitches S are continuously formed on the work cloth without piercing the needle 11 into the string-like material, and the staggered stitches S are sewn on the work cloth along the sewing line L. . In the bending portion Lb of the sewing line L, the guide 16 is turned at an angle θ corresponding to the curvature of the bending portion Lb. When the turning angle θ exceeds 30 °, the guide 16 is swung with a larger swing width W2 to the inside than the outside of the curved portion Lb.

  The embroidery sewing machine according to this embodiment includes a setting device that sets the swing width of the guide 16 by the staggered swing mechanism. As shown in FIG. 7, a setting list 66 for separately setting the right side swing width and the left side swing width from the sewing line L is displayed on the display unit 51 of the setting device. In the setting list 66, when setting the swing width of the curved portion Lb where the turning angle of the guide 16 exceeds 30 °, the operator sets the swing width on the inner side of the curved portion Lb to be larger than the swing width on the outer side. . Further, as shown in FIG. 8, a registration list 69 for registering the set left and right deflection widths in association with the number of stitches is displayed on the display unit 51 of the setting device.

  Next, the embroidery sewing machine and the embroidery method of the present invention will be described in detail based on examples. As shown in FIGS. 1 to 4, the embroidery sewing machine 1 of this embodiment includes a sleeve 3 at a lower portion of an arm 2, and a bobbin 4 for supplying a code C is attached to the sleeve 3. The sleeve 3 is rotatably supported by a bearing 6 (see FIG. 3) on the bottom wall 5 of the arm 2, and a pipe 7 is integrally rotatable with the sleeve 3 inside the sleeve 3 and is inserted into the sleeve 3 so as to be movable up and down. Yes. A nipple 8 is fixed to the lower end of the pipe 7, and a presser foot 9 is attached to the lower end. A hollow needle bar 10 is inserted inside the nipple 8, and a needle 11 is fixed to the lower end of the needle bar 10. Then, the upper thread T is supplied to the needle 11 through the inside of the needle bar 10, and the cord C is sewn on the work cloth W on the needle plate 12 as the needle bar 10 moves up and down. The sewing pitch is usually 2 to 3 mm.

  On the outer surface of the lower end of the sleeve 3, a staggered lever 13 is supported by a support shaft 14 so as to be able to swing left and right. A guide 16 that guides the cord C from the bobbin 4 to the needle drop point and a tensioner 17 that applies tension to the cord C before the guide 16 are attached to the arm portion 15 of the staggered lever 13. The guide 16 of this example is a tapered pipe-like part having a guide hole, and the horizontal distance G (see FIG. 2) from the needle 11 to the guide 16 (specifically, the exit of the guide hole) is set to about 3 mm, for example. Has been. Above the staggered lever 13, a ring 18 is supported on the outer periphery of the sleeve 3 so as to be rotatable and vertically movable, and a connecting piece 19 projects downward on the outer surface thereof. A roller 21 fitted to the slit 20 of the staggered lever 13 is supported at the lower end of the connecting piece 19, and the ring 18 is moved up and down to swing the staggered lever 13 about the support shaft 14, and the guide 16 is sewn on the sewing line L. (See FIG. 9).

  A rod 23 is suspended inside the arm 2 and a staggered motor 24 is disposed on the right side surface of the arm 2. A lift body 25 is supported on the rod 23, a motor shaft 26 of a staggered swing motor 24 is connected to the lift body 25 via a motion converter 27, and the lift body 25 is moved along the rod 23 by forward and reverse rotation of the motor shaft 26. Is lifted up and down. A fork portion 29 into which the groove 28 of the ring 18 is inserted is formed at the lower part of the lifting body 25, and the ring 18 is driven up and down along the sleeve 3 by the lifting and lowering of the lifting body 25. The staggered swing motor 24, the lifting body 25, the ring 18 and the staggered lever 13 constitute a staggered swing mechanism 30 that swings the guide 13 to the left and right of the sewing line before the needle drop point.

  A driven pulley 32 is provided at the upper end of the sleeve 3, and a timing belt 34 is wound around the driven pulley 32 and a driving pulley 33 on the rear side thereof. The drive pulley 33 is supported on the bottom wall 5 of the arm 2 by a pulley shaft 35, and a gear 36 is provided on the pulley shaft 35 so as to be rotatable integrally with the drive pulley 33. A turning motor 37 is installed at the rear of the arm 2, and a pinion 39 that meshes with the gear 36 is provided on the motor shaft 38. The turning motor 37, the timing belt 34, and the pulleys 33 and 32 constitute a turning mechanism 40, and the guide 16 is integrated with the bobbin 4 and the sleeve 3 along the axis of the needle bar 10 as the motor shaft 38 rotates forward and backward. It is turned around.

  A grooved ring 42 is fixed to the upper end of the pipe 7, and a fork portion 45 of an elevating member 44 (see FIG. 1) is inserted into the circumferential groove 43. A lifting motor 46 is installed on the left side of the arm 2, and a lifting member 44 is connected to the lifting motor 46 via a motion converter 48. The nipple 8 is moved up and down integrally with the pipe 7 by the rotation of the lifting motor 46, and the presser foot 9 is driven up and down in synchronization with the needle bar 10. In an embroidery sewing machine dedicated to heavy work cloth such as a mat, the presser foot 9 and its driving mechanism can be omitted.

  An embroidery pattern data editing device 50 as shown in FIG. 5 is installed in the embroidery sewing machine 1 of this embodiment. The editing device 50 includes a liquid crystal display unit 51, a key operation unit 52, an FD drive 53, and a control device 54. The key operation unit 52 is provided with a plurality of editing mode switching keys 55, a cursor movement key 56, and a plurality of function keys 57. The control device 54 is provided with a CPU 58, a RAM 59, a ROM 60, and an internal storage device 61. The CPU 58 controls the display of the liquid crystal display unit 51 based on the input from the key operation unit 52 and outputs the edited embroidery pattern data to an operation control circuit (not shown) of the embroidery sewing machine 1. Yes.

  When the pattern display key 55a of the edit mode switching key 55 is pressed, a pattern display screen 62 is displayed on the liquid crystal display unit 51 as shown in FIG. On this screen 62, the embroidery pattern data is displayed in graphic form by the sewing line L, and the registration number 63 of the embroidery pattern data, a read icon 64a, and a confirmation icon 64d are displayed. The operator presses the function key 57a at the position corresponding to the read icon 64a, reads the embroidery pattern data from the FD or the internal storage device 61, selects the required embroidery pattern data based on the display of the sewing line L, and confirms the icon 64d. The function key 57d at the position corresponding to is pressed, and the embroidery pattern data is determined as an editing target. Then, the editing mode switching key 55 is selectively operated to perform editing operations such as XY coordinate information (working cloth W positioning information), color change information, and thread trimming information in the embroidery pattern data.

  When the staggered key 55b of the edit mode switching key 55 is pressed, the editing device 50 functions as a setting device for setting the swing width of the guide 16 (specifically, at the exit of the guide hole) by the staggered swing mechanism 30. 7, a staggered swing width setting screen 65 is displayed on the liquid crystal display unit 51. The setting screen 65 is provided with a setting list 66 that is a means for setting the left and right swing widths of the guide 16 separately. The setting list 66 includes a column indicating a distribution pattern (Z1 to Z5) and a column for designating a deflection width (W1 in FIG. 4) on the right side of the sewing line L when viewed from the stitch progressing direction (the arrow direction in FIG. 6). , And a column for designating a deflection width (W2) on the left side of the sewing line L. The operator moves the cursor 67 to the target cell with the cursor movement key 56, inputs the left and right deflection width of the guide 16 with the function keys 57b and 57c corresponding to the plus icon 64b or the minus icon 64c, and confirms with the function key 57d. .

  When the zigzag key 55b is continuously pressed, a staggered stitch data registration screen 68 is displayed on the liquid crystal display unit 51 as shown in FIG. The registration screen 68 is provided with a registration list 69 that is means for registering the left and right deflection widths set on the setting screen 65 in association with the number of stitches. The registration list 69 includes a column indicating a stitch group number, a column specifying the number of stitches from the start of sewing for each group, a column specifying a function (AZ1: zigzag stitching start, ZS: swing width change), This is composed of a column for designating a distribution pattern (Z1 to Z5). The operator moves the cursor 67 to the target cell, inputs the number of stitches, the function, and the sorting pattern in association with each other, and registers the confirmed zigzag stitch data in the FD or the internal storage device 61. The sewing line L on the pattern display screen 62 is given a number that matches the stitch group number in the registration list 69.

  Next, an embroidery method will be described in which the embroidery sewing machine 1 having the above-described configuration is used to sew a cord on a work cloth with zigzag stitches. As described above, the sewing pitch is 2 to 3 mm, the horizontal distance G from the needle 11 to the guide 16 (see FIG. 2) is set to about 3 mm, and the following set values are examples under these conditions. It is. First, as shown in FIG. 6, necessary embroidery pattern data is read on the pattern display screen 62 of the data editing device 50, and the overall configuration of the sewing line L is determined. Next, as shown in FIG. 7, a staggered swing width setting screen 65 is displayed, and in the setting list 66, the left and right swing widths of the guides 16 are separately set in the sorting patterns Z1 to Z5. For example, in the sewing line L shown in FIG. 6, when sewing a fine cord on the straight portions Lc and Le or the curved portions La and Lg having a small curvature, the left and right runout widths of the pattern Z1 are both set to 4 mm, In the case of this code, both the left and right deflection widths of the pattern Z3 are set to 15 mm.

  On the other hand, in the case of a curved portion having a large curvature, that is, a curved portion in which the turning angle of the guide 16 exceeds 30 °, a larger deflection width is set on the inner side than on the outer side of the curved portion. For example, in the case of the curved portions Lb and Lf of the sewing line L shown in FIG. 6, in the distribution pattern Z2, the right side deflection width that is outside the curved portions Lb and Lf is set to 3 mm, and the inside of the curved portions Lb and Lf Is set to 9 mm. In the case of the curved portion Ld, in the distribution pattern Z4, the right side swing width that is inside the curved portion Ld is set to 9 mm, and the left side swing width that is outside the curved portion Ld is set to 3 mm. As shown in the distribution pattern Z5, when the swing width is input to only one of the left and right, the same left and right swing width is set as in the patterns Z1 and Z3.

  Subsequently, as shown in FIG. 8, a staggered stitch data registration screen 68 is displayed, and the number of stitches from the start of sewing, a function code, and a distribution pattern code are set in the registration list 69. Here, the pattern display screen 62 and the data registration screen 68 are alternately displayed, and, for example, a staggered stitch start code AZ1 is set for the first needle at the head of the sewing line L. For the second needle, a runout width change code ZS and a pattern code Z1 corresponding to the curved portion La having a small curvature are set. For the 30th stitch, a runout width change code ZS and a pattern code Z2 corresponding to the curved portion Lb having a large curvature are set. For the 50th stitch, a runout change code ZS and a pattern code Z1 corresponding to the straight line portion Lc are set. In this way, the staggered stitching data is completed by associating the sorting pattern with the total number of stitches, and this data is added to the corresponding embroidery pattern data and registered in the internal storage device 61.

  Next, the embroidery sewing machine 1 is operated using the zigzag stitch data, and as shown in FIG. 9, zigzag stitches S are continuously formed on the work cloth, and the code C is formed on the work cloth W by the zigzag stitches S. Sew. At this time, the turning motor 37 is driven with a pulse corresponding to the angle obtained from the XY coordinate value in the embroidery pattern data, and the staggered swing motor 24 is a pulse corresponding to the swing width specified in the sorting patterns Z1 to Z5. It is driven by. As a result, in the curved portion La having a small curvature, the guide 16 is turned at a small angle corresponding to the curvature, and is also swung to the left and right of the sewing line L with an equal run width (4 mm) designated in the sorting pattern Z1. .

  On the other hand, in the curved portion Lb having a large curvature, the guide 16 is turned at a large angle (θ = 30 °) corresponding to the curvature. Further, as shown in FIG. 9A, the guide 16 swings to the right side of the sewing line L (outside the curved portion Lb) with a small swing width W1 (3 mm) based on the swing width specified in the distribution pattern Z2. Then, as shown in FIG. 9 (b), it is swung to the left side of the sewing line L (inside the curved portion Lb) with a large swing width W2 (9 mm).

  For this reason, even when the guide 16 is swung to the inside or outside of the curved portion Lb, the cord C can be surely escaped to the side of the needle drop point P. Therefore, in the curved portions Lb, Ld, and Lf in which the turning angle of the guide 16 exceeds 30 °, the cord C can be sewn with the staggered stitch S having a regular shape without dropping the needle 11 on the cord C. it can. In addition, the outer deflection width can be reduced to half or less of the inner deflection width, and the width of the staggered stitch S can be matched with the thickness of the cord C.

It is a front view of the embroidery sewing machine which shows one Example of this invention. It is a right view of the embroidery sewing machine of FIG. It is the III-III sectional view taken on the line of FIG. It is a front view which shows the zigzag swing mechanism of the embroidery sewing machine of FIG. It is a front view which shows the embroidery pattern data editing apparatus of the embroidery sewing machine of FIG. It is a front view which shows the pattern display screen of the editing apparatus of FIG. FIG. 6 is a front view showing a staggered swing width setting screen of the editing apparatus of FIG. 5. It is a front view which shows the zigzag stitch data registration screen of the editing apparatus of FIG. It is a top view which shows the embroidery method by the embroidery sewing machine of FIG. It is a top view which shows the conventional embroidery method. It is a top view which shows the problem by the conventional embroidery method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Embroidery sewing machine 4 Bobbin 10 Needle bar 11 Needle 13 Staggered lever 16 Guide 30 Staggered swing mechanism 40 Turning mechanism 50 Data editing device 62 Pattern display screen 65 Staggered swing width setting screen 66 Setting list 68 Staggered data registration screen 69 Registration list C code L Sewing line Lb Curved part P Needle entry point

Claims (2)

  Guide the string-like material to the needle drop point with the guide, swing the guide to the left and right of the sewing line before the needle drop point, and stab the needle into the string-like material by turning the guide around the axis of the needle bar When forming a staggered stitch on the work cloth and sewing the string-like material along the curved portion of the sewing line by the staggered stitch, swing the guide at the curved portion to the inside more than the outside of the curved portion. An embroidery method characterized by moving.   A guide that guides cord-like material such as cords and tape to the needle drop point, a staggered swing mechanism that swings the guide to the left and right of the sewing line before the needle drop point, and a turning mechanism that turns the guide around the axis of the needle bar In an embroidery sewing machine in which staggered stitches are formed on the work cloth without piercing the string-like material, and the string-like material is sewn along the sewing line by the staggered stitches, the guide swing by the zigzag swing mechanism There is a setting device for setting the width, setting means for setting the right and left deflection widths separately from the sewing line in the setting device, and registration for registering the set left and right deflection widths in association with the number of stitches An embroidery sewing machine characterized by comprising means.

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