JP2012120736A - Sewing machine for upper fancy stitch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sewing machine for an upper fancy stitch, capable of easily forming a highly decorative and novel upper fancy stitch structure by using two first and second upper fancy threads.SOLUTION: A sewing machine for an upper fancy stitch includes: three or four sewing needles 12 vertically driven by a needle bar 22 and arranged in parallel in a horizontal direction; a first upper fancy thread guide member 16A arranged in a side of the plurality of sewing needles 12 and provided with a first upper fancy thread insertion hole 35; a second upper fancy thread guide member 16B provided with a second upper fancy thread insertion hole 44; and an upper fancy spreader 17 having a first thread engagement part 37 and a second thread engagement part 38 for respectively hooking a first upper fancy thread 18 having passed through the first upper fancy thread insertion hole 35 and a second upper fancy thread 19 having passed through the second upper fancy thread insertion hole 44, and oscillating back and forth in a horizontal direction in accordance with vertical movement of the sewing needles 12. The first upper fancy thread guide member 16A and the second upper fancy thread guide member 16B are oscillated back and forth along with the upper fancy spreader 17.

Description

  The present invention relates to a top stitch sewing machine, and in particular, has a top stitch structure that uses two top decor threads and has a strong conspicuousness and improves decorativeness without mixing two top decor threads. The present invention relates to a sewing machine that can be easily formed.

  Conventionally, as an upper ornament stitch structure, for example, as shown in FIG. 32, a first stitch thread stitch that is a stitch of a left needle thread 51 that penetrates one upper ornament thread 50 through a sewing fabric (not shown). 52 and the second needle thread stitch 54, which is the stitch of the intermediate needle thread 53 adjacent thereto, is entangled in a loop shape and stitched in a zigzag shape (see, for example, Patent Documents 1 and 2). .

  Further, as shown in FIG. 33, two first and second upper decorative threads 55 and 56 are used, and the first upper decorative thread 55 is a stitch of the left needle thread 51 penetrating a sewing fabric (not shown). The first stitch thread stitch 52 and the second stitch thread stitch 54, which is the stitch of the adjacent needle thread 53, are combined in a streak shape (planar shape) parallel to the second stitch thread stitch 54, and the second stitch thread stitch 54 and the right needle thread. The third stitch thread 58, which is 57 stitches, is entangled in a loop and sewed in a zigzag manner, and the second upper thread 56 is entangled in a loop with the second stitch thread stitch 54 and the third stitch thread stitch 58. Some of them also form an upper decorative stitch 59 that is sewn in a zigzag shape (see, for example, Patent Document 3).

Japanese Utility Model Publication No. 60-2974 (Fig. 2) Japanese Unexamined Patent Publication No. 2000-37579 (FIG. 9) Utility Model Registration No. 3155710 (FIG. 7)

However, since the upper decorative stitch structure shown in FIG. 32 has only one upper decorative thread 50, only a simple decorative pattern can be obtained and the decorative effect is poor.
On the other hand, the upper decorative stitch structure shown in FIG. 33 uses two first and second upper decorative threads 55 and 56, so that the surface of the sewing fabric has different colors and a multi-colored and layered feeling. There are decorative yarns that can be formed. The plurality of sewing needle threads 51, 53, and 57 can be of different colors, and the first upper decorative thread 55 and the second upper decorative thread 56 are also different from the sewing needle threads 51, 53, and 57. Therefore, the decorative thread formed on the sewing fabric not only has many color variations, but also has a layered feeling in the pattern, but the first upper thread stitch between the second stitch thread stitch 54 and the third stitch thread stitch 58 Since the color of the decorative yarn 55 and the color of the second upper decorative yarn 56 are mixed, the color of the first upper decorative yarn 55 and the color of the second upper decorative yarn 56 cancel each other out and are inconspicuous colors Looks bad and looks bad. In addition, since the first upper thread 55 and the second upper thread 56 overlap between the second sewing thread stitch 54 and the third sewing thread stitch 58, there also arises a problem that the touch becomes worse when the skin comes into contact therewith. .

  The present invention has been made in order to solve such problems, and the object of the present invention is to use two first and second upper decorative threads, and to use a novel decorative upper decorative stitch. An object of the present invention is to provide a top stitch sewing machine which can easily form a structure.

  The upper sewing machine according to the present invention will be described with reference to the reference numerals attached to FIGS. 1 to 31 for easy understanding of the contents of the invention. Three sewing needles 12 (first sewing needle (left needle) 12a, second sewing needle (middle needle) 12b, third sewing needle (right needle) 12c) or four sewing needles 12 (first sewing needles 12) that are driven and arranged in parallel in the horizontal direction. 1 to 3 sewing needles 12a to 12c, and a fourth sewing needle 12d arranged on the right side of the third sewing needle 12c), and a plurality of sewing needles 12 disposed on the side, and a first upper decoration thread insertion hole The first upper decorative yarn guide member 16A provided with 35 and the second upper decorative yarn guide member 16B provided on the upper side of the first upper decorative yarn guide member 16A and provided with the second upper decorative yarn insertion hole 44. The first upper decorative thread 18 that has passed through the first upper decorative thread insertion hole 35 and the second upper decorative thread It has a first thread engaging part 37 and a second thread engaging part 38 for hooking the second upper decorative thread 19 that has passed through the insertion hole 44, and reciprocally swings in the left-right direction in accordance with the vertical movement of the sewing needle 12. The first upper decorative thread guide member 16A and the second upper decorative thread guide member 16B are configured to reciprocally swing together with the upper decorative spreader 17. Is.

  According to the upper sewing machine with the above configuration, when the three to four needles 12 continue to move up and down repeatedly, the first upper decorative thread 18 and the second upper decorative thread 19 are pulled by the horizontal swing of the upper decorative spreader 17. A first stitch thread stitch which is a stitch of the needle thread 131 passed through the first sewing needle 12a in the three to four-needle type top stitch sewing machine by combining the hanging and releasing operations. 131S and the second sewing thread stitch 132S, which is the stitch of the needle thread 132 passed through the second sewing needle 12b adjacent thereto, are intertwined in a loop shape and sewn in a zigzag shape, and the second upper decorative thread 19 is 3 In this needle-type upper sewing machine, the second sewing thread stitch 132S and the third sewing thread stitch 133S, which is the stitch of the needle thread 133 passed through the third sewing needle 12c, are intertwined in a loop to form a zigzag shape. In a four-needle type top ornament sewing machine, it is entangled in a loop with a third sewing thread stitch 133S and a fourth sewing thread stitch 134S, which is a stitch of the needle thread 134 passed through the fourth sewing needle 12d. Thus, it is possible to form a top stitch structure that is sewn in a zigzag shape. Therefore, the zigzag pattern formed by the first upper decorative thread 18 and the zigzag pattern formed by the second upper decorative thread 19 can be clearly separated and appear independently on the left and right sides. For this reason, the first sewing thread stitch 131S and the second sewing needle are generated. The color of the first upper decorative thread 18 between the thread stitches 132S and the second upper decorative thread between the second sewing thread stitch 132S and the third sewing thread stitch 133S or between the third sewing thread stitch 133S and the fourth sewing thread stitch 134S. The 19 colors are conspicuous, that is, the color is highly visible, enhancing the conspicuousness. In addition, by changing the types of the first upper decorative yarn 18 and the second upper decorative yarn 19 such as the color and material, it is possible to expand a completely new design variation that has not been seen in the past and to display various upper decorative patterns. In the case of a three-needle type upper sewing machine, the needle thread 132 of the second sewing thread is used as an intermediate boundary, and in the case of the four-needle type upper sewing machine, the needle thread 132 of the second sewing thread and the third sewing thread are used. The decoration effect can be further enhanced when two sewing fabrics having different left and right colors or two sewing fabrics having different left and right materials are used with the middle of the needle thread 133 as a boundary.

  Further, only the first upper thread 18 is stitched between the first stitch thread stitch 131S and the second stitch thread stitch 132S, and between the second stitch thread stitch 132S and the third stitch thread stitch 133S or the second stitch thread stitch 133S. Since the stitch of only the second upper decoration thread 19 exists separately and independently between the third sewing thread stitch 133S and the fourth sewing thread stitch 134S, an upper decoration stitch structure can be formed. The seam of the upper decorative thread 18 and the seam of the second upper decorative thread 19 do not overlap each other, so that the entire seam becomes a flat seam, and the touch at the time of skin contact is improved. Furthermore, since the tension of the first upper thread 18 and the tension of the second upper thread 19 can be independently changed, for example, the first sewing thread stitch 131S and the second sewing thread stitch 132S are loose. In the loosened state, the sewing tone can be changed to the tightened state between the second sewing thread stitch 132S and the third sewing thread stitch 133S or between the third sewing thread stitch 133S and the fourth sewing thread stitch 134S.

  Furthermore, each loop portion 18R of the first upper decoration thread 18 spans between the adjacent stitches 131p, 131p of the first sewing thread stitch 131S and between the adjacent stitches 132p, 132p of the second sewing thread stitch 132S. Each loop portion 19R of the second upper decorative thread 19 is between the adjacent stitches 132p, 132p of the second sewing thread stitch 132S, between the adjacent stitches 133p, 133p of the third sewing thread stitch 133S, or between the third sewing thread stitch 133S. It is possible to form an upper stitch structure in which the stitches straddle between the adjacent stitches 133p and 133p and between the neighboring stitches 134p and 134p of the fourth stitch thread stitch 134S and are successively straddled without skipping the feed pitch. . Therefore, the curvature of each of the loop portions 18R and 19R can be increased, and the zigzag pattern can be transformed into a state close to a clogged belt-like pattern with little clearness. The colors of the upper decorative yarns 19 can be clearly expressed, and the decorativeness can be enhanced by increasing the color area effect.

  When the first upper decorative thread 18 and the second upper decorative thread 19 are made of different colors or different materials, the color tone of the first upper decorative thread 18 and the second upper decorative thread 19 is different, and a color scheme that combines two harmonious colors is combined. It is possible to make a two-tone color upper seam.

  Since the first upper decorative yarn guide member 16A and the second upper decorative yarn guide member 16B are configured to reciprocally swing together with the upper decorative spreader 17, the first upper decorative yarn 18 and the second upper decorative yarn 19 are connected to the first upper decorative yarn guide member 16B. It can be smoothly and stably guided and moved to the first yarn hooking portion 37 and the second yarn hooking portion 38 of the upper ornament spreader 17 through the first upper ornament yarn insertion hole 35 and the second upper ornament yarn insertion hole 44, Thread breakage and skipping of the first and second upper decorative threads 18 and 19 can be prevented.

  According to the top stitch sewing machine of the present invention, the zigzag pattern with less eye clearance with the first upper decoration thread and the zig zag pattern with less eye clearance with the second upper decoration thread can be left and right without mixing. It is advantageous in that it is possible to easily obtain a novel upper decorative seam structure that can appear separately and independently so as to enhance the noticeability.

1 is an overall perspective view showing a three-needle type top stitch sewing machine according to an embodiment of the present invention. FIG. 2 is a perspective view of a swing mechanism of an upper decorative spreader and an upper decorative thread guide member in the upper decorative sewing machine of FIG. 1. FIG. 3 is a side view of the swing mechanism of the upper decoration spreader and the upper decoration yarn guide member of FIG. 2. FIG. 3 is a plan view of a swing mechanism of the upper decoration spreader and the upper decoration yarn guide member of FIG. 2. FIG. 3 is a front view of a swing mechanism of the upper decoration spreader and the upper decoration yarn guide member of FIG. 2. FIG. 3 is a plan view of the upper decoration spreader and the upper decoration yarn guide member of FIG. 2. FIG. 3 is a front view of the upper decoration spreader and the upper decoration yarn guide member of FIG. 2. FIG. 3 is a left side view of the upper decoration spreader and the upper decoration yarn guide member of FIG. 2. FIG. 3 is a right side view of the upper decoration spreader and the upper decoration yarn guide member of FIG. 2. FIG. 3 is a perspective view of the upper decorative spreader and the upper decorative yarn guide member of FIG. 2 as viewed from the front left side. FIG. 3 is a perspective view of the upper decorative spreader and the upper decorative yarn guiding member of FIG. 2 as viewed from the front right side. FIG. 3 is a plan operation view of the upper decoration spreader and the upper decoration yarn guide member of FIG. 2. FIG. 3 is an exploded perspective view of the upper decoration spreader and the upper decoration yarn guide member of FIG. 2. It is a perspective view which shows an example of the threading path | route in the upper decoration sewing machine of FIG. It is an expansion perspective view of the A section in FIG. FIGS. 1A and 1B show an upper decorative stitch structure that can be realized by the upper decorative sewing machine of FIG. 1, wherein FIG. 1A is a plan view and FIG. 1B is a perspective view. FIG. 16 shows a state at the time when the rotation angle of the sewing machine main shaft is 0 degree (360 degrees) and the three sewing needles are lowered to the bottom dead center position, which is the lowest position, in the process of forming the upper decorative seam. (A) is a top view, (b) is a front view. FIG. 16 shows a state when the rotation angle of the main spindle of the sewing machine is 60 degrees and the three sewing needles are slightly raised to a position between the bottom dead center and the top dead center in the process of forming the upper decorative stitch in FIG. Is a plan view, and (b) is a front view. FIG. 16 shows a state at the time when the rotation angle of the main spindle of the sewing machine is 120 degrees and the three sewing needles are further raised to a position between the bottom dead center and the top dead center in the process of forming the upper decorative stitch in FIG. Is a plan view, and (b) is a front view. FIG. 16 shows a state at the time when the rotation angle of the main spindle of the sewing machine is 180 degrees and the three sewing needles are raised to the top dead center position, which is the highest position, in the process of forming the upper decorative stitch in FIG. FIG. 2B is a front view. In the process of forming the upper decorative seam in FIG. 16, the rotation angle of the main spindle of the sewing machine is 240 degrees and three sewing needles are lowered to a position between the top dead center and the bottom dead center. A top view and (b) are front views. In the process of forming the upper decorative seam in FIG. 16, the rotation angle of the main spindle of the sewing machine is 300 degrees and the three sewing needles are lowered to a position between the top dead center and the bottom dead center. A top view and (b) are front views. It is a perspective view which shows an example of the threading path | route in the 4-needle type upper decoration sewing machine of the other Example of this invention. It is an expansion perspective view of the B section in FIG. It is a top view of the upper decoration stitch structure realizable with the 4-needle type upper decoration sewing machine of the other Example of this invention. FIG. 25 shows a state at the time when the rotation angle of the sewing machine main shaft is 0 degree (360 degrees) and the four sewing needles are lowered to the bottom dead center position, which is the lowest position, in the process of forming the upper decorative stitch, (A) is a top view, (b) is a front view. FIG. 25 shows the state when the rotation angle of the main spindle of the sewing machine is 60 degrees and the four sewing needles are slightly raised to a position between the bottom dead center and the top dead center in the process of forming the upper decorative seam in FIG. Is a plan view, and (b) is a front view. FIG. 25 shows a state when the rotation angle of the sewing machine main shaft is 120 degrees and the four sewing needles are further raised to a position between the bottom dead center and the top dead center in the process of forming the upper decorative stitch in FIG. Is a plan view, and (b) is a front view. FIG. 25 shows a state at the time when the rotation angle of the main spindle of the sewing machine is 180 degrees and the four sewing needles are raised to the top dead center position, which is the highest position, in the process of forming the upper decorative stitch in FIG. FIG. 2B is a front view. In the process of forming the upper decorative seam in FIG. 25, the rotation angle of the main spindle of the sewing machine is 240 degrees and the four sewing needles are lowered to a position between the top dead center and the bottom dead center. A top view and (b) are front views. FIG. 25 shows a state in which the rotation angle of the main spindle of the sewing machine is 300 degrees and the four sewing needles are lowered to a middle position between the top dead center and the bottom dead center in the process of forming the upper decorative stitch in FIG. A top view and (b) are front views. It is a top view which shows the upper decoration stitch structure of a prior art example. It is a top view which shows the upper decoration stitch structure of another prior art example.

  Preferred embodiments of the present invention will be described below with reference to the drawings.

  In FIG. 1, a frame 1 of a 3 to 4 needle type upper sewing machine according to the present invention includes a bed portion 2, a trunk portion 3 standing upward from one end portion of the bed portion 2, and an upper portion of the trunk portion 3. The arm portion 4 extends in parallel with the bed portion 2.

  As shown in FIGS. 14 and 15, thread tensions 5, 6, 7, and 8 are arranged on the body 3 of the frame 1 of the three-needle type upper decoration sewing machine from the upper side. The upper three thread tensions 5 include three sewing needles 12 (first sewing needle (left needle) 12a, second sewing needle (middle needle) 12b) through a silicon tank 9, a needle thread path 10 and a needle bar thread path 11. , The third sewing needle (right needle) 12c) is applied with a predetermined tension to the needle threads 131, 132, 133 respectively. The lower thread tensions 6 and 7 are arranged on the side of the sewing thread 12 and the decorative thread paths such as the first decorative thread path 14 and the second decorative thread path 15 provided in the lower part of the silicon tank 9. The first upper decorative yarn 18 and the second upper decorative yarn 19 passed through the upper decorative spreader (upper looper) 17 via the first upper decorative yarn guide member 16A and the second upper decorative yarn guide member 16B. The thread tension 8 at the lowermost stage gives a predetermined tension to the lower looper thread 20 passed through a lower looper (not shown) disposed inside the bed portion 2. .

  A sewing machine main shaft (upper shaft) 21 shown in FIG. 2 is built in the arm portion 4 of the three-needle type top cover sewing machine, and a needle bar 22 is fixed to the left end of the sewing machine main shaft 21 by the sewing machine main shaft 21. It is reciprocated up and down via a crank 23 and the like. As shown in FIG. 15, a needle clamp 24 is fixed to the lower end portion of the needle bar 22, and three needles 12 (first sewing needle (left sewing needle) 12a, second sewing needle (medium sewing needle) 12b are attached to the needle clamp 24. , The third sewing needle (right sewing needle) 12c) is arranged and fixed by shifting the needle height so as to form a stepped shape that gradually increases the position of the needle tip. That is, the tips of the first sewing needle 12a are the lowest, the tips of the second sewing needle 12b adjacent to the first sewing needle 12a are slightly higher, and the tips of the third sewing needle 12c are arranged and fixed in a stepped manner.

As shown in FIGS. 2 and 15, the arm portion 4 on which the needle bar 22 is disposed is provided with first and second upper decoration thread guide members 16 </ b> A and 16 </ b> B and an upper decoration spreader 17.
2 to 13, a known swing mechanism 25 that reciprocally swings the top ornament spreader 17, and first and second top decoration thread guide members 16A and 16B that swing back and forth together with the top ornament spreader 17 are novel. The swing mechanism 26 will be described.

  First, the swing mechanism 25 of the upper spreader 17 will be described. As shown in FIGS. 2 to 5, an eccentric cam 27 is fixed to the sewing machine main shaft 21, and a rod having a connecting lever portion 28a is attached to the eccentric cam 27. The connecting lever portion 28 a of the rod 28 is pivotally connected to a protruding lever 29 a of a drive shaft (decoration swing shaft) 29 disposed in parallel to the sewing machine main shaft 21. A swing lever 30 is fixed to the left end portion of the drive shaft 29, and a tip portion 30 a of the swing lever 30 is inserted and connected to a crank pin 32 a of a crank 32 provided integrally with an upper end portion of a vertical spreader shaft 31. The connecting pin member 33 is connected.

  As shown in FIGS. 6 to 13, the spreader drive arm 34 is fixed to the lower end portion of the spreader shaft 31, and the vertical shaft portion 17 a of the upper spreader 17 is inserted and fixed to the tip portion of the drive arm 34. A first thread hook for hooking the first upper decorative thread 18 that has passed through the first upper decorative thread guide member 16A and the second upper decorative thread 19 that has passed through the second upper decorative thread guide member 16B is respectively applied to the upper decorative spreader 17. A portion 37 and a second yarn hooking portion 38 are provided. In FIG. 2, when the sewing machine main shaft 21 is rotationally driven in a predetermined direction, the drive shaft (decoration shaft) 29 and the swing lever 30 are simultaneously moved as the rod 28 swings via the eccentric cam 27. The spreader shaft 31 reciprocally swings around the vertical axis via a universal joint-like connection mechanism including the connecting pin member 33, the crank pin 32a, and the crank 32. The upper sprinkler 17 swings back and forth in the left-right direction in accordance with the up and down movements of the first sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c.

  Next, the novel swing mechanism 26 of the first and second upper thread guide members 16A and 16B will be described. As shown in FIGS. 2 to 13, the lower end portion of the spreader shaft 31 and the spreader drive arm 34 are arranged. A decorative thread guide member driving arm 39 is fixed to the upper side, and a bifurcated portion 40a of one end of the bifurcated rod 40 is connected to the decorative thread guide member drive arm 39 by a pivot 41, and is connected to the other end of the bifurcated rod 40. The crank pin 43a of the crank 43 fixed to the upper end of the decorative yarn guide member shaft 42 is inserted and coupled, and the upper and lower first and second upper decorative yarn guide members 16B and 16A are inserted and fixed to the lower end of the decorative yarn guide member shaft 42. Is done. An upper mounting bracket 52 is fixed to the arm portion 4 of the frame 1 with a screw 53, and a lower mounting bracket 55 is fixed to the upper mounting bracket 52 with a screw 54, and is decorated on a bearing cylinder portion 55 a provided on the lower mounting bracket 55. The thread guide member shaft 42 is inserted and supported. At the same time, simultaneously with the reciprocating swinging of the upper decoration spreader 17 in the left-right direction, the first and second upper decoration yarn guide members 16A and 16B are arranged so that the decoration yarn guide member driving arm 39, the forked rod 40, and the decoration yarn guide member shaft. It swings back and forth in the left-right direction via 42.

  As shown in FIGS. 13 and 15, the first upper decoration thread guide member 16 </ b> A has a tip portion 161 formed in an L shape, and the first upper decoration thread 18 is passed through the tip section 161 to pass the first upper decoration thread 18. A thread insertion hole 35 is provided penetrating in a tunnel shape, and a second upper decoration thread insertion hole 44 through which the second upper decoration thread 19 is passed is provided at the distal end portion 163 of the second upper decoration thread guide member 16B. The first and second upper thread guide members 16B and 16A are configured to be positionally adjustable in the reciprocating swinging direction. That is, as shown in FIGS. 6 to 12, the rear end base 162 of the first upper decoration thread guide member 16 </ b> A and the rear end base 164 of the second upper decoration thread guide member 16 </ b> B are respectively connected to the lower end of the decoration thread guide member shaft 42. It is inserted so as to be reciprocally swingable around the vertical axis and fixed with a screw 45, and by loosening the screw 45, the positions of the first and second upper thread guide members 16A and 16B can be adjusted in the reciprocating swing direction. . Therefore, for example, by adjusting the position of the first upper decoration thread guide member 16A, the first upper decoration thread 18 can be passed through the position behind the second sewing needle 12b (see FIG. 20A). The swing start angle of the decorative yarn guide member 16A can be adjusted.

  Now, in FIG. 2, when the sewing machine main shaft 21 is driven to rotate in a predetermined direction, the drive shaft (decoration shaft) 29 and the swing lever 30 are moved as the rod 28 swings through the eccentric cam 27. Simultaneously reciprocally swings, and the spreader shaft 31 reciprocates around the vertical axis through a universal joint-like coupling mechanism including the coupling pin member 33, the crank pin 32a, and the crank 32. As shown in FIG. 12, it is swung leftward (clockwise) within a range of a constant rocking angle, and is swung rightward (counterclockwise) within the range of the constant rocking angle. As shown in FIG. 12, simultaneously with the reciprocating swinging of the upper decoration spreader 17 in the left-right direction, the first and second upper decoration thread guide members 16A, 16B reciprocate in the left-right direction. As described above, the first and second upper decorative yarn guide members 16A and 16B are configured to swing back and forth together with the upper decorative spreader 17 so that the first upper decorative yarn 18 and the second upper decorative yarn 19 are connected. It can be smoothly and stably guided and moved to the first yarn hooking portion 37 and the second yarn hooking portion 38 of the upper ornament spreader 17 through the first upper ornament thread insertion hole 35 and the second upper ornament thread insertion hole 44. , Breakage and skipping of the first upper decorative yarn 18 and the second upper decorative yarn 19 can be prevented.

  Next, the process of forming the upper decorative seam as shown in FIGS. 16 (a) and 16 (b) by the above-described three-needle type upper decorative sewing machine will be described with reference to FIGS. 17 (a), 17 (b) to 22 (a). ) And (b) will be described.

  As shown in FIGS. 20 (a) and 20 (b), the first and second upper thread guide members 16A and 16B are previously provided with three first sewing needles 12a, When the sewing needle 12b and the third sewing needle 12c are raised to the top dead center, which is the highest position, the first upper decorative thread 18 is behind the second sewing needle 12b, and the second upper decorative thread 19 is the first. The swing start angles of the first and second upper decorative thread guide members 16A and 16B are adjusted so as to pass in front of the two sewing needles 12b.

  Needle threads 131, 132, and 133 are passed through the first sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c, respectively, and the first upper decorative thread 18 is the first upper decorative thread of the first upper decorative thread guide member 16A. The second upper decorative thread 19 is passed in correspondence with the insertion hole 35, and is passed in correspondence with the second upper decorative thread insertion hole 44 of the second upper decorative thread guide member 16B. The needle threads 131, 132, 133 of the first sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c can all use the same or similar color needle threads or different color needle threads. The first upper decorative yarn 18 and the second upper decorative yarn 19 may use different colored yarns, or the same or similar colored yarns, and may have different colors from the needle yarns 131, 132, 133. .

  First, three needle threads 131, 132, 133 passed through the first sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c, respectively, and the first upper decorative thread 18 below the first upper decorative thread guide member 16A. 17 and the second upper decorative thread 19 below the second upper decorative thread guide member 16B are pulled in the direction of travel of the sewing fabric 46, and FIGS. 17A and 17B (the rotation angle of the main spindle of the sewing machine is 0 degrees (360 degrees). ), The three first sewing needles 12a, the second sewing needle 12b, and the third sewing needle 12c are lowered to the bottom dead center position, which is the lowest position). The first sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c completely penetrate the sewing material 46, and the thread guide structure (not shown) of the lower looper thread 20 (see FIG. 14) is the first sewing needle 12a, In accordance with the vertical movement of the second sewing needle 12b and the third sewing needle 12c, 6 (b), the lower looper thread 20 and the needle threads 131, 132, 133 of the first sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c are engaged and fixed (this technique is well known). Therefore, explanation is omitted). At this time, the upper surface spreader 17 is at the position farthest from the first sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c. After the needle threads 131, 132, 133 passed through the first sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c and the lower looper thread 20 are hooked and fixed as described above, the first upper decoration thread 18 The second upper decorative thread 19 is also fixed on the surface of the sewing fabric 46 by the needle threads 131, 132, 133.

  Next, the first sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c are shown in FIGS. 18A and 18B (when the rotation angle of the sewing machine main shaft 21 is 60 degrees, the three first sewing needles 12a and the second sewing needle 12b , And a state diagram when the third sewing needle 12c is slightly raised to a position between the bottom dead center and the top dead center), FIGS. 19A and 19B (first rotation angle of the sewing machine main shaft 21 is 120 degrees). The sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c are moved upward as shown in a state diagram when the sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c are further raised to a position between the bottom dead center and the top dead center. It swings to the left in accordance with the upward movement of the first sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c. At this time, the first yarn hooking portion 37 of the upper ornament spreader 17 hooks the first upper yarn 18 and the second yarn hooking portion 38 hooks the second upper yarn 19.

  Next, the sewing cloth 46 is fed, and the first sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c are moved to the first sewing needle 12c shown in FIGS. The sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c operate upward as shown in FIG. When the position is reached, the upper spreader 17 swings to the limit point in the left direction within the operable range, and the preparation for swinging back to the right is completed. It should be noted at this time that the first upper decorative yarn 18 is moved by moving the front end 161 of the first upper decorative yarn guiding member 16A from the front side toward the rear between the first sewing needle 12a and the second sewing needle 12b. The second sewing thread 19 is passed through the front of the first sewing needle 12a and the back of the second sewing needle 12b, and the second upper decorative thread 19 passes through the front of the second sewing needle 12b and the back of the third sewing needle 12c.

  Next, the first sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c are shown in FIGS. 21 (a) and 21 (b) (the rotation angle of the sewing machine main shaft 21 is 240 degrees, the three first sewing needles 12a and the second sewing needles). 12b and when the third sewing needle 12c starts to move downward as shown in the state diagram when it is lowered to a position between the top dead center and the bottom dead center), the upper spreader 17 also swings to the right. Start moving.

  22 (a) and 22 (b) (the rotation angle of the sewing machine main shaft 21 is 300 degrees, the three first sewing needles 12a, the second sewing needles 12b, and the third sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c When the third sewing needle 12c is moved downward as shown in a state diagram when the third sewing needle 12c is lowered to a position between the top dead center and the bottom dead center), the upper spreader 17 is also swung to the right and the first thread hook is hooked. The first upper decorative thread 18 is released from the portion 37 and the second upper decorative thread 19 is released from the second thread hooking portion 38, and the first sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c operate downward. Therefore, the needle thread 131 of the first sewing needle 12a presses the first upper decoration thread 18 and is sewn to the sewing fabric 46, and the needle thread 132 of the second sewing needle 12b is the first upper decoration thread 18 and the second upper decoration thread 19. Are simultaneously sewn on the sewing fabric 46, and the third sewing needle 12 is also sewn. The needle thread 133 is sewn to the sewing fabric 46 presses the second upper cover thread 19 (see FIG. 16 (a)), the operation of the one stitch is completed.

  When the first sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c continue to move up and down repeatedly as shown in FIGS. 17 (a), (b) to 22 (a), (b), the upper spreader As shown in FIGS. 16 (a) and 16 (b), the first upper decorative yarn 18 and the second upper decorative yarn 19 are combined by the movement of hooking and releasing the first upper decorative yarn 18 and the first upper decorative yarn 19 by swinging left and right. The first sewing thread stitch 131S, which is the stitch of the left needle thread 131 through which the thread 18 penetrates the sewing cloth 46, and the second sewing thread stitch 132S, which is the seam of the intermediate needle thread 132 that also passes through the sewing cloth 46 next to the sewing thread 46. The second upper decorative thread 19 is a third stitch that is a seam of the right needle thread 133 that penetrates the sewing cloth 46 and the second sewing thread thread 132S next to the second sewing thread thread 132S. Needle thread stitch 133S The loop portions 18R of the first upper thread 18 are interlaced between adjacent stitches 131p, 131p of the first sewing thread stitch 131S and adjacent to the second sewing thread stitch 132S. The loop portions 19R of the second upper decoration thread 19 straddle between the matching stitches 132p and 132p, and the adjacent stitches 133p and 133p of the second sewing thread stitch 132S and between the adjacent stitches 132p and 132p of the second sewing thread stitch 132S. An upper decorative stitch structure 156 is formed so as to straddle each other.

  As shown in FIGS. 16 (a) and 16 (b), such an upper decorative stitch structure uses two first and second upper decorative threads 18 and 19 by three-needle flat stitching. The decorative thread 18 is looped into a first sewing thread stitch 131S that is the stitch of the left needle thread 131 that penetrates the sewing fabric 46 and a second sewing thread stitch 132S that is the stitch of the adjacent intermediate needle thread 132. The second upper decoration thread 19 is intertwined in a zigzag manner and looped around the second sewing thread stitch 132S and the third sewing thread stitch 133S, which is the stitch of the right needle thread 133. It is sewn into.

  By sewing the first upper decorative thread 18 and the second upper decorative thread 19 in this way, the zigzag pattern formed by the first upper decorative thread 18 and the zigzag pattern formed by the second upper decorative thread 19 are clearly separated on the left and right. Therefore, the color of the first upper decorative thread 18 and the color of the second upper decorative thread 19 are conspicuous, and a stitch pattern with a high visibility that enhances the conspicuousness can be obtained.

Further, only the first upper thread 18 is stitched between the first stitch thread stitch 131S and the second stitch thread stitch 132S, and between the second stitch thread stitch 132S and the third stitch thread stitch 133S. 2 Since the stitches of only the upper decorative thread 19 are separated and independent, the first upper decorative thread 18 and the second upper decorative thread 19 do not overlap each other. Becomes a flat seam and feels better when touching the skin.
Further, the tension of the first upper decorative yarn 18 and the tension of the second upper decorative yarn 19 can be independently changed. For this reason, for example, the sewing tone is made different between the first sewing thread stitch 131S and the second sewing thread stitch 132S in a loosely loose state and between the second sewing thread stitch 132S and the third sewing thread stitch 133S in a tightened state. be able to. On the contrary, the sewing tone may be changed between the first sewing thread stitch 131S and the second sewing thread stitch 132S in a tightened state and between the second sewing thread stitch 132S and the third sewing thread stitch 133S in a loosely loose state. it can.

  Each loop portion 18R of the first upper decoration thread 18 straddles between the adjacent stitches 131p, 131p of the first sewing thread stitch 131S and between the adjacent stitches 132p, 132p of the second sewing thread stitch 132S. Each loop portion 19R of the second upper decorative thread 19 spans between the adjacent stitches 132p, 132p of the second sewing thread stitch 132S and between the adjacent stitches 133p, 133p of the third sewing thread stitch 133S. As a result, the curvature of each loop portion 18R of the first upper decorative yarn 18 and the curvature of each loop portion 19R of the second upper decorative yarn 19 can be respectively increased, and the zigzag pattern is changed to a band-like pattern with a small amount of clearness. Since it can be transformed into a close state, the colors of the first upper decorative yarn 18 and the second upper decorative yarn 19 can be clearly expressed, and the decorativeness can be enhanced by increasing the color area effect. .

  As described above, the upper decorative stitch structure as shown in FIG. 16 can be easily obtained by the above-mentioned upper decorative stitch sewing machine of the three-needle type.

  In the above embodiment, a case has been described in which an upper decorative stitch structure as shown in FIG. 16 is obtained by a three-needle type upper decorative sewing machine. However, an upper decorative sewing machine as shown in FIG. A decorative stitch structure can be easily obtained.

  Next, a four-needle type upper sewing machine will be described.

  As shown in FIGS. 23 and 24, thread tensions 5, 6, 7, and 8 are arranged on the body 3 of the frame 1 of the four-needle type upper decoration sewing machine from the upper side. The upper four thread tensions 5 include four sewing needles 12 (first sewing needle (left needle) 12a, second sewing needle (middle needle) 12b via a silicon tank 9, a needle thread path 10 and a needle bar thread path 11. , The third sewing needle (middle needle) 12c, and the fourth sewing needle (right needle) 12d) are each given a predetermined tension to the needle threads 131, 132, 133, and 134. The lower thread tensions 6 and 7 are arranged on the side of the sewing thread 12 and the decorative thread paths such as the first decorative thread path 14 and the second decorative thread path 15 provided in the lower part of the silicon tank 9. The first upper decorative yarn 18 and the second upper decorative yarn 19 passed through the upper decorative spreader (upper looper) 17 via the first upper decorative yarn guide member 16A and the second upper decorative yarn guide member 16B. The thread tension 8 at the lowermost stage gives a predetermined tension to the lower looper thread 20 passed through a lower looper (not shown) disposed inside the bed portion 2. .

  As in the case of the arm portion 4 of the three-needle type top ornament sewing machine, the arm portion 4 of the four-needle type top ornament sewing machine has a built-in sewing machine main shaft (upper shaft) 21 shown in FIG. The needle bar 22 is reciprocated up and down by the sewing machine main shaft 21 via a needle bar crank 23 fixed to the left end of the sewing machine main shaft 21. As shown in FIG. 24, a needle clamp 24 is fixed to the lower end portion of the needle bar 22, and four needles 12 (first sewing needle (left sewing needle) 12a, second sewing needle (medium sewing needle) 12b are attached to the needle clamp 24. , The third sewing needle (middle sewing needle) 12c and the fourth sewing needle (right sewing needle) 12d) are arranged and fixed by shifting the needle height so as to form a stepped shape that gradually increases the position of the needle tip. That is, the tip of the first sewing needle 12a is the lowest, the tip of the adjacent second sewing needle 12b is slightly higher, the tip of the adjacent third sewing needle 12c is slightly higher, and the fourth sewing needle 12d It is arranged and fixed in a staircase shape so that the tip is the highest.

  The arm portion 4 on which the needle bar 22 is disposed has the first and second upper thread guide members 16A, 16A, as in the case of the arm portion 4 of the three-needle type upper sewing machine shown in FIGS. 16B and a top spreader 17 are provided. A swing mechanism 25 that reciprocally swings the top ornament spreader 17 and a swing mechanism 26 of the first and second top decoration thread guide members 16A and 16B that reciprocally swings together with the top ornament spreader 17 are shown in FIGS. Since it is the same as the swinging mechanisms 25 and 26 in the case of a three-needle type top stitch sewing machine, the same reference numerals are assigned to the same members and the description thereof is omitted.

  Next, referring to FIGS. 26 (a), (b) to 31 (a), (b) regarding the process of forming the upper decorative stitch as shown in FIG. 25 by the four-needle type upper decorative sewing machine. I will explain.

  As shown in FIGS. 29 (a) and 29 (b), the first and second upper thread guide members 16A and 16B are previously provided with four first sewing needles 12a, When the sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d are raised to the top dead center position, which is the highest position, the first upper decorative thread 18 is positioned in front of the first sewing needle 12a and the second sewing needle 12b. The swing angle of each of the first and second upper decorative thread guide members 16A and 16B is set so that the second upper decorative thread 19 passes through the front of the third sewing needle 12c and the rear of the fourth sewing needle 12d. Adjust it.

  Needle threads 131, 132, 133, and 134 are passed through the first sewing needle 12a, the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d, respectively, and the first upper decorative thread 18 is the first upper decorative thread guide member. 16A is passed through corresponding to the first upper decorative thread insertion hole 35, and the second upper decorative thread 19 is passed through corresponding to the second upper decorative thread insertion hole 44 of the second upper decorative thread guide member 16B. The needle threads 131, 132, 133, and 134 of the first sewing needle 12a, the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d are all the same or similar colored needle threads, or different colored needle threads. Can be used. The first upper decorative thread 18 and the second upper decorative thread 19 are made of different colors, or the same or similar colors, and different colors from the needle threads 131, 132, 133, and 134. Can do.

  First, four needle threads 131, 132, 133, and 134 passed through the first sewing needle 12a, the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d, respectively, and the first upper decoration thread guide member 16A 26 (a) and 26 (b) (rotation of the main spindle of the sewing machine), the first upper decorative thread 18 and the second upper decorative thread 19 below the second upper decorative thread guide member 16B are pulled in the traveling direction of the sewing fabric 46. (When the angle is 0 degree (360 degrees) and the first sewing needle 12a, the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d are lowered to the lowest dead center position). As shown, at the start of sewing, the first sewing needle 12a, the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d completely penetrate the sewing fabric 46, and the lower looper thread 20 (see FIG. 23). Guide structure (not shown) includes first and second sewing needles 12a and 12a. 2b, the lower looper thread 20, the first sewing needle 12a, the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d. 132, 133, and 134 are engaged and fixed (this technique is well known and will not be described). At this time, the upper spreader 17 is located at a position farthest from the first sewing needle 12a, the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d. After the respective needle threads 131, 132, 133, and 134 passed through the first sewing needle 12a, the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d and the lower looper thread 20 are hooked and fixed as described above, The first upper decorative thread 18 and the second upper decorative thread 19 are also fixed on the surface of the sewing fabric 46 by the needle threads 131, 132, 133, 134.

  Next, the first sewing needle 12a, the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d are shown in FIGS. 27A and 27B (the rotation angle of the sewing machine spindle 21 is 60 degrees, FIG. 28A, FIG. 28B (rotation of the sewing machine main shaft 21) when the sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d are slightly raised to a position between the bottom dead center and the top dead center. As shown in a state diagram when the angle is 120 degrees and the first sewing needle 12a, the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d are further raised to a position between the bottom dead center and the top dead center). The upper spreader 17 moves upward, and swings to the left in accordance with the upward movement of the first sewing needle 12a, the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d. At this time, the first yarn hooking portion 37 of the upper ornament spreader 17 hooks the first upper yarn 18 and the second yarn hooking portion 38 hooks the second upper yarn 19.

  Next, the sewing fabric 46 is fed, and the first sewing needle 12a, the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d are shown in FIGS. 29 (a) and 29 (b) (the rotation angle of the sewing machine main shaft 21 is 180 degrees). The first sewing needle 12a, the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d are moved upward as shown in FIG. When the predetermined top dead center position is reached, the upper spreader 17 swings to the left limit point within the operable range, and preparation for swinging back to the right is completed. It should be noted at this time that the first upper decorative yarn 18 is moved forward and backward from the front side between the second sewing needle 12b and the third sewing needle 12c by the distal end portion 161 of the first upper decorative yarn guiding member 16A. The second sewing thread 19 is passed through the front of the first sewing needle 12a and the back of the second sewing needle 12b, and the second upper decorative thread 19 passes the front of the third sewing needle 12c and the back of the fourth sewing needle 12d.

  Next, the first sewing needle 12a, the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d are shown in FIGS. 30 (a) and 30 (b) (the rotation angle of the sewing machine main shaft 21 is 240 degrees, the first sewing needle 12a, When the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d start to move downward as shown in a state diagram when they are lowered to a middle position between the top dead center and the bottom dead center, the upper spreader 17 Also starts swinging in the right direction.

  The first sewing needle 12a, the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d are shown in FIGS. 31 (a) and 31 (b). When the third sewing needle 12c and the fourth sewing needle 12d move downward as shown in the state diagram when the third sewing needle 12c and the fourth sewing needle 12d are lowered to an intermediate position between the top dead center and the bottom dead center, the upper spreader 17 also swings to the right. The first upper thread 18 is released from the first thread hook 37 and the second upper thread 19 is released from the second thread hook 38, and the first sewing needle 12a, the second sewing needle 12b, and the third sewing needle 12c are released. Since the fourth sewing needle 12d moves downward, the needle thread 131 of the first sewing needle 12a and the needle thread 132 of the second sewing needle 12b press the first upper decoration thread 18 and sew them onto the sewing fabric 46. Needle thread 133 of the third sewing needle 12c and the fourth sewing needle 12d Needle thread 134 is sewn to the sewing fabric 46 presses the second upper cover thread 19 (see FIG. 25), operation of one stitch is completed.

  The first sewing needle 12a, the second sewing needle 12b, the third sewing needle 12c, and the fourth sewing needle 12d continue to move up and down repeatedly as shown in FIGS. 26 (a), (b) to 31 (a), (b). At this time, by combining the actions of hooking and releasing the first upper decorative yarn 18 and the second upper decorative yarn 19 by swinging the upper decorative spreader 17 from side to side, as shown in FIG. The first sewing thread stitch 131S, which is the stitch of the left needle thread 131 that penetrates the sewing cloth 46, and the second sewing thread stitch 132S, which is the seam of the intermediate needle thread 132 that also passes through the sewing cloth 46, next to this. The second upper decoration thread 19 is intertwined in a loop shape and stitched in a zigzag shape, and the right needle thread penetrating the sewing cloth 46 is adjacent to the third sewing thread stitch 133S, which is the stitch of the intermediate needle thread 133. The 134th stitch The loop portion 18R of the first upper thread 18 is interlaced between the adjacent stitches 131p and 131p of the first sewing thread stitch 131S and the second sewing thread 131S. The loop portions 19R of the second upper decorative thread 19 straddle between the adjacent stitches 132p, 132p of the sewing thread stitch 132S, and the loop portions 19R of the second upper thread 19 are between the adjacent stitches 133p, 133p of the third sewing thread stitch 133S and the fourth sewing thread stitch 134S. An upper decorative stitch structure 157 is formed so as to straddle between adjacent stitches 134p, 134p.

  As shown in FIG. 25, such an upper decorative stitch structure uses two first and second upper decorative threads 18 and 19 in a four-needle type upper decorative stitch. The first sewing thread stitch 131S that is the stitch of the left needle thread 131 that penetrates the sewing fabric 46 and the second sewing thread stitch 132S that is the stitch of the adjacent intermediate needle thread 132 are zigzag entangled in a loop. The second upper decoration thread 19 is looped into a third sewing thread stitch 133S that is the stitch of the intermediate needle thread 133 and a fourth sewing thread stitch 134S that is the stitch of the right needle thread 134. Is intertwined in and zigzag stitched.

  By sewing the first upper decorative thread 18 and the second upper decorative thread 19 in this way, the zigzag pattern formed by the first upper decorative thread 18 and the zigzag pattern formed by the second upper decorative thread 19 are clearly separated on the left and right. Therefore, the color of the first upper decorative thread 18 and the color of the second upper decorative thread 19 are conspicuous, and a stitch pattern with a high visibility that enhances the conspicuousness can be obtained.

Further, only the first upper thread 18 is stitched between the first stitch thread stitch 131S and the second stitch thread stitch 132S, and between the third stitch thread stitch 133S and the fourth stitch thread stitch 134S. 2 Since the stitches of only the upper decorative thread 19 are separated and independent, the first upper decorative thread 18 and the second upper decorative thread 19 do not overlap each other. Becomes a flat seam and feels better when touching the skin.
Further, the tension of the first upper decorative yarn 18 and the tension of the second upper decorative yarn 19 can be independently changed. For this reason, for example, the sewing tone is made different between the first sewing thread stitch 131S and the second sewing thread stitch 132S in a loosely relaxed state and between the third sewing thread stitch 133S and the fourth sewing thread stitch 134S in a tightened state. be able to. On the other hand, the sewing condition may be changed so that the first sewing thread stitch 131S and the second sewing thread stitch 132S are tightened and the third sewing thread stitch 133S and the fourth sewing thread stitch 134S are loosely loose. it can.

  Each loop portion 18R of the first upper decoration thread 18 straddles between the adjacent stitches 131p, 131p of the first sewing thread stitch 131S and between the adjacent stitches 132p, 132p of the second sewing thread stitch 132S. 2 Each loop portion 19R of the upper decorative thread 19 spans between the adjacent stitches 133p, 133p of the third sewing thread stitch 133S and between the adjacent stitches 134p, 134p of the fourth sewing thread stitch 134S. As a result, the curvature of each loop portion 18R of the first upper decorative yarn 18 and the curvature of each loop portion 19R of the second upper decorative yarn 19 can be respectively increased, and the zigzag pattern is changed to a band-like pattern with a small amount of clearness. Since it can be transformed into a close state, the colors of the first upper decorative yarn 18 and the second upper decorative yarn 19 can be clearly expressed, and the decorativeness can be enhanced by increasing the color area effect. .

12 sewing needle 12a first sewing needle 12b second sewing needle 12c third sewing needle 12d fourth sewing needle 16A first upper decoration thread guide member 16B second upper decoration thread guide member 17 upper decoration spreader 18 first upper decoration thread 19 second upper decoration thread 22 Needle bar 35 First upper decoration thread insertion hole 44 Second upper decoration thread insertion hole 37 First thread engagement portion 38 Second thread engagement portion

Claims (1)

  Driven up and down by a needle bar 22, three to four sewing needles 12 arranged side by side in the horizontal direction and a first upper decoration thread insertion hole 35 provided on the side of the plurality of sewing needles 12 are provided. A first upper decorative thread guide member 16A, a second upper decorative thread guide member 16B provided on the upper side of the first upper decorative thread guide member 16A and provided with a second upper decorative thread insertion hole 44; and the first upper decorative thread guide member 16B. A first thread engaging portion 37 and a second thread engaging for hooking the first upper decorative thread 18 that has passed through the decorative thread insertion hole 35 and the second upper decorative thread 19 that has passed through the second upper decorative thread insertion hole 44, respectively. An upper decoration spreader 17 having a portion 38 and reciprocally swinging in the left-right direction in accordance with the vertical movement of the sewing needle 12, and includes a first upper decoration thread guide member 16A and a second upper decoration thread guide member 16B. Is configured to swing back and forth together with the upper spreader 17 Decorative sewing sewing machine on which the butterflies.

Images