KR20020076133A - Forming device for forming pin tuck using zigzag sewing machine - Google Patents

Abstract

PURPOSE: To allow a worker to easily, efficiently and stably sew uniform and beautiful pin-tucks regardless of its skill by improving the stability stitch balancing thread tension, the feeding stability of a sewing matter (cloth), and the visual confirmability of seams in sewing in the formation of pin-tucks by use of a zigzag lock stitch sewing machine. CONSTITUTION: A throat plate 11a comprises a hole 12a located between the lateral needle locating positions 20a and 20b of one needle and extended long in the feeding direction S of a sewing matter 13. A guide plate 10 for freely inserted to the hole 12a from the upper surface side of the throat plate 11a is formed on the lower surface of a presser 8. A feed dog 14a has a U-shaped sectional U-groove 15a in a position opposed to the hole 12a to work a feeding force to a pin-tuck part.

Description

Pin jaw forming device by zigzag sewing machine {FORMING DEVICE FOR FORMING PIN TUCK USING ZIGZAG SEWING MACHINE}

The present invention is a pin by a zigzag sewing machine alternately interlacing with a bobbin thread of a horizontal drum in a left and right position corresponding to a needle vibration width while shaking one needle from side to side. It relates to a jaw forming device.

Since the sewing material (cloth) which gave pin tuck has the functionality which stretches a sewing material (cloth), and has unique decorativeness, the demand is increasing.

The pin tuck can be formed by inverting the sewing material (cloth) and sewing it along an inverted portion.

In addition, pin tuck is formed by tacking, the sewing material (cloth) is heat-treated to fix the pin tuck shape, and the stitch is released to remove the sewing thread, thereby forming a wrinkled pin tuck semi-permanently. Multiple pin chins can be used as a good stretch material, and their popularity is high because they can decorate surfaces such as cloths or display unique textures.

In general, when tacking, the simplicity of removing the lancet is an important production issue.

In addition, when the pin jaw is used as a decoration, the uniformity, the degree of freedom of design, and the like become a problem, and a sewing machine capable of sewing a uniform and neat pin jaw securely without depending on the skill of a skilled worker is required.

In addition, it is ideal to increase the degree of freedom of design if there is a sewing machine that can sew not only straight lines but also curved pin jaws without breaking their uniformity.

In addition, the sewing machine that the operator can visually check the completion state of the seam during the sewing operation by the sewing machine is preferable.

In order to sew a pin tuck made of a conventional sewing material (cloth) is bent in a U-shape, an existing zigzag sewing machine is used to improve a pin tuck, or an existing rock stitch sewing machine is used. At that time, it was sewn by the following production method.

(Conventional example 1)

The case of improving and using the existing zigzag sewing machine (formerly referred to as Example 1) is demonstrated with reference to FIG.

In the case of improving the existing zigzag sewing machine, as shown in FIG. 11 (a), a needle 6 for two needles is attached to the lower end of the needle bar 1 of the existing zigzag sewing machine, and an infiltration 6 is provided. Attach the needle (2a) and the needle (2b) through. Each of the needles 2a and 2b passes through an upper thread (not shown). The projection 7 is placed on the needle plate 4 upper surface. This deforms the sewing (cloth) 3 into an inverted U shape. The shape of the pin tuck can be adjusted by the height of this protrusion 7.

The needle vibration of the zigzag sewing machine is used in the stopped state. When the sewing material (cloth) 3 is set in the sewing machine, the sewing material (cloth) 3 is in the shape of an inverted U-shaped pin jaw along the protrusion 7 on the upper surface of the needle plate 4. When the sewing machine operates, the left and right needles 2a and 2b simultaneously penetrate the sewing material (cloth) 3, and the upper thread passing through the left and right needles 2a and 2b is the lower thread of the single drum 5 and the lacing. do. Accordingly, the pin tuck is applied to the sewing material (cloth) 3.

(Conventional example 2)

When using a conventional single-stitched lacquer sewing machine (not subject to needle vibration), the sewing material (cloth) 3 is folded as shown in FIG. 11 (b), and the needle 2 is dropped on the pin jaw to complete the sewing. After spreading the sewing (cloth) (3) to secure the pin jaw shape.

However, in the conventional example 1 using the above-described existing zigzag sewing machine improved, there was the following problem.

First, in the conventional example 1, the two upper threads passing through the left and right needles 2a and 2b are laced by the drum 5 for jig sewing, so the drum 5 pulls up the left and right upper threads, but the left and right needles It was difficult to pull up the two upper threads which dropped by the space | interval of (2a) (2b) to the pointed end of the drum 5, and there existed a problem of pushing exquisite finishing, such as the timing which raises the left and right threads.

Secondly, in the prior art example 1, since the timing of threading of the drum 5 of the left and right upper threads is different after the pointed end of the drum 5 is aligned, the sewing state becomes uneven and the sharp ends of the drum 5 pull the left and right upper threads. There was a problem that the upper and lower left and right upper thread interferes in the drum 5 from the time of raising to the time when the upper and left upper threads are missing in the drum 5, resulting in unstable tension.

Third, despite the unstable sewing state in the prior art example 1, the joint point of the thread becomes the bottom of the sewing (cloth) (3) at the time of sewing, there was a problem that can not work while checking the abnormal state of the sewing. In other words, seam visibility is not good.

Fourthly, in the conventional example 1, there existed a problem that sewing wrinkles, a torsion, etc. generate | occur | produced in the pin tuck shape, and become an unstable shape.

The reason for this is ① As the inverted U-shaped pin jaw protrudes to the upper surface of the sewing material (cloth) 3 and does not directly contact the feed teeth, it is disposed away from the feed teeth. This difficult to transfer, ② the pressing portion (not shown) or the left and right needles (2a) (2b) to the inverted U-shaped pin jaw formed on the upper surface of the sewing (cloth) (3) contact the interference The force acts in the direction that it is easy to receive, and the movement of the sewing material (3) is hindered, and ③ the inverted U-shaped pin jaw rises on the upper surface of the sewing material (3), It is conceivable that the shape tends to be unstable due to the influence.

In order to correct the pin jaw shape, the operator is under the burden of carefully guiding the sewing (cloth) 3 in the conveying direction by using both hands, and the uniformity of the product depends on the skill of the operator. Curved pin tuck, etc. further required the skill of the operator.

Fifthly, in the conventional example 1, there was a problem in that the easy removal of the thread was impossible. Sewing machines generally have very low tension in the upper thread, which makes it difficult to sew the lower thread in a straight line even when the lower thread is strong. For this reason, in the conventional example 1, since the upper thread is implemented in a zigzag shape on the straight line, it is difficult to pull out any thread.

On the other hand, in the conventional example 2 using the existing lac stitch sewing machine has the following problems. In other words, the sewing on the lactitch sewing machine is sewing the sewing (cloth) (3) at the pin chin position each time the worker folds the folds manually by hand, so the workability, productivity is poor, and the side relying on the skill of the skilled person There was a problem that it was difficult to sew them evenly, such as when sewing multiple pins (two or more).

In the conventional example 2, the sewing material (cloth) 3 is folded and bent, and the two-ply sewing material (cloth) 3 near the bent portion is sewn with one upper thread and one lower thread, so the pin jaw becomes a loop shape. At the same time, there was a problem in that it was impossible to form a pin-shaped jaw, and at the same time, the easy removal of the thread was impossible.

The present invention is to solve the problems of the prior art in forming a pin jaw using a zigzag sewing machine, the stability of the seal tension, the stability of the transfer of the sewing material (cloth), without forcing an exquisite pointed fit, The object of the present invention is to improve the visibility of seams at the time of sewing, and to easily and efficiently sew the pin jaws evenly and neatly without depending on the skill of the operator.

BRIEF DESCRIPTION OF THE DRAWINGS The exploded perspective view which shows the main component structure in one Embodiment of this invention.

2: is a top view (a), front view (b), and B-B cross section figure (c) of the press part 8 in one Embodiment of this invention.

3 is a cross-sectional view along the line A-A in FIG.

4 is a cross-sectional view taken along line C-C in FIG.

FIG. 5 is a cross-sectional view corresponding to FIG. 3 for explaining another embodiment of the present invention. FIG.

Fig. 6 is a perspective view of a sewing machine seam in one embodiment of the present invention.

It is a perspective view of the north part of the sewing machine for sewing the sewing machine seam in one Embodiment of this invention.

It is a top view of the north part of the sewing machine for sewing the sewing machine seam in one Embodiment of this invention.

The perspective view for demonstrating the formation method of the pin tuck in one Embodiment of this invention.

It is a perspective view (a) of the pin tuck after sewing in one Embodiment of this invention, the top view (b) of a seam, and the top view (c) of another seam.

Figure 11 is a perspective view for explaining a pin jaw forming method of a conventional example.

※ Explanation of symbols about main part of drawing ※

1: needle bar 2: needle

3,13: sewing material (cloth) 4,11: needle plate

5: north 6: sinking

7: projection 8: press

9: needle drop 10: guide plate

12a: hole 12b: groove

14a, 14b, 14c: Feed tooth 15a: U groove

15b: hole 16: hole

17: tooth part 18: incision

19: center line 20a, 20b: needle dropping position

21: evacuation groove 22a, 22b: needle through portion

31: needle 32: needle bar

33: north of right 34: north of left

33a, 34b: pointed tip Y1: needle thread

Y2: right bobbin room

Y3: left bobbin room (north thread of north drum)

In order to solve the above problems, the invention of claim 1 is

A needle vibration mechanism which shakes the shanghai-dong position of one needle 31 from side to side,

A pair of horizontal drums 33 and 34 disposed left and right corresponding to the vibration width of the needle 31 and rotating in opposite directions;

A groove 12b is formed between the left and right positions of the needle 31 on the upper and lower sides of the needle 31 in a long length in the conveying direction of the sewing material and opened on the upper surface thereof, and the pair of horizontal drums 33 ( A needle plate 11a disposed above the middle of the upper portion 34;

A feed tooth 14 disposed below the needle plate 11a to send the sewing material 13 in a direction orthogonal to the needle vibration direction;

A guide plate 10 is arranged to allow the sewing object to be bent in a U-shape at the bottom of the needle plate 11a so that the guide plate 10 can be inserted into the groove 12b in a relaxed manner, and the top surface of the needle plate 11a is disposed. It is provided with the compression part 8 which crimps the sewing material 13 put on it.

Therefore, according to the invention of claim 1, it includes a needle vibration mechanism for shaking one needle from side to side, and a pair of horizontal drums arranged side to side to correspond to the vibration width of the needle and rotating in opposite directions. By alternately pulling up to the tip of the drum, it is possible to facilitate the pointed tip alignment by not lifting two upper threads into one drum, and the disturbance of the thread tension caused by the two threads being pulled into one drum is eliminated. . In addition, it is located between the needle drop positions on the left and right sides of the needle and extends in the sewing direction, and a groove that is opened on the upper surface of the needle plate is disposed on the needle plate, and the guide plate is inserted into this groove from the upper side of the needle plate, and the bottom of the pressing portion Since the guide plate is part of the sewing material is corrected to the pin jaw shape of the cross-section U, the guide plate is guided into the groove, and the U-shaped pin jaw portion is formed to slap the bottom of the sewing material. Accordingly, the sewing material is sent evenly without any skill of the operator, so the pin jaw shape is stabilized, and no sewing wrinkles or twists occur in the pin jaw shape, so that the pin jaw can be easily, efficiently and stably sewn. . For example, the pin jaw is stabilized without the operator pressing the sewing material by hand.

In addition, since the seam of the pin tuck (nodal point between the upper thread and the lower thread) is formed on the upper side of the sewing material, the sewing worker can check the completion of the pin tuck seam while checking the completion state of the pin tuck seam so that the problem of suture can be found quickly. .

The invention of claim 2 is as shown in Fig. 5 (a) in the invention of claim 1,

The back surface of the needle plate 11b in the range corresponding to the formation range of the groove 12b is raised, and the groove 12b is formed to the inside of the bump,

A hole 15b is formed in the transfer tooth 14b in a range facing the raised portion.

Therefore, according to the invention of claim 2, the back side of the needle plate in the range corresponding to the formation range of the groove formed in the needle plate is raised, and the groove is formed to the inside of the bump, so that the groove is deeper than the plate thickness of the needle plate. It is also possible to form a pin tuck with a raised height larger than the plate thickness of the needle plate.

In addition, when the conventional feed dog is used as it is, the feed dog may contact the raised portion of the back of the needle plate so that the transfer operation may not be performed normally, so that the hole is formed in a range opposite to the raised portion of the feed tooth. . As a result, contact with the raised portion can be avoided, so that the transfer operation can be performed normally.

The invention of claim 3 is

A needle vibrating mechanism which shakes the shank east position of one needle 31 from side to side,

A pair of horizontal books 33 and 34 disposed left and right corresponding to the vibration width of the needle 31 and rotating in opposite directions;

A hole 12a extending in a long length in the conveying direction of the sewing material is formed between the left and right shandong positions of the needle, and the needle plate 11 disposed above the pair of horizontal books 33 and 34. )and,

A feed tooth 14 disposed below the needle plate 11 and cooperating with the bottom surface of the pressing part 8 to send the sewing material 13 in a direction orthogonal to the needle vibration direction;

A guide plate 10 is arranged to allow the object to be bent in a U-shape to be inserted into the hole 12a from the upper side of the needle plate at a lower side, and the sewing material 13 placed on the upper surface of the needle plate. ) Is provided with a crimping portion 8 for crimping.

Therefore, according to the invention of claim 3, it comprises a needle vibration mechanism for shaking one needle from side to side, and a pair of horizontal drums arranged side to side in correspondence with the vibration width of the needle, and rotating in opposite directions. Since it is not possible to pull up two upper threads by one drum by alternately pulling up to the pointed end of the drum, the pointed tip can be easily done, and the disturbance of the thread tension caused by the two threads being pulled by one drum Resolved. In addition, this guide is located between the left and right needle dropping positions of the needle, and a hole extending in the conveying direction of the sewing material is disposed on the needle plate, and the guide plate is provided at the bottom of the pressing part to allow the hole to be freely inserted from the upper side of the needle plate. A portion of the sewing material is corrected into a pin tuck of a cross-section U by the plate and guided into the hole, and a U-shaped pin tuck is formed by hanging on the underside of the sewing material. Accordingly, the sewing material is uniformly transported without any skill of the operator, so the pin jaw shape is stabilized, and no sewing wrinkles or twists occur in the pin jaw shape, so that the pin jaw can be easily and efficiently and reliably sewn. Can be. For example, the pin jaw is stabilized without the operator pressing the sewing material by hand.

In addition, since the hole is arranged in the needle plate, the raised height of the pin tuck to be sewn can be sewn even if the height is relatively high with respect to the thickness of the needle plate.

At the same time, the feed force can be imparted by the feed teeth provided below the needle plate at the lower end of the pin tuck portion penetrating the hole to be lower than the bottom of the needle plate. The whole sewing material can be conveyed more uniformly.

In addition, since the seam of the pin tuck (nodal point between the upper thread and the lower thread) is formed on the upper side of the sewing material, the sewing worker can proceed to the pin tuck sewing work while checking the completion state of the pin tuck seam so that the problem of suture can be found quickly. .

The invention of claim 4 is the invention of claim 3, for example, as shown in Figure 3 (a),

A groove 15a elongated in the conveying direction S of the sewing object 13 opposite to the hole 12a is disposed in the conveying tooth 15d.

Therefore, according to the invention of claim 4, the needle plate is provided with a hole in which the pin jaw of the sewing material is guided, and a hole disposed in the needle plate because a groove long in the conveying direction opposite to the hole is disposed in the feed tooth, The depth of the whole pin tuck forming groove which consists of the groove | channel arrange | positioned at a feed tooth becomes deeper than the plate | board thickness of a needle plate, and it can sew the high pin tuck of the height which towered with respect to the plate | board thickness of a needle plate.

In addition, the inner surface of the groove disposed in the feed tooth is in contact with the lower end of the pin jaw portion penetrating through the hole of the needle plate to be lower than the bottom of the needle plate, so that the feed force can be directly applied to the pin jaw portion. Thereby, the whole sewing material can be conveyed more uniformly.

The inner surface shape of the groove is preferably a U-shaped cross section along the pin tuck shape. This is to increase the contact area with the pin jaw.

It is also effective to arrange the teeth on the inner surface of the groove to increase the frictional force and increase the transfer efficiency of the transfer force.

The invention of claim 5 is as shown in Fig. 3 (b) in the invention of claim 4,

The back surface of the transfer tooth 14a in the range corresponding to the formation range of the groove 15a is raised, and the groove 15a is formed up to the inside of the bump.

Therefore, according to the invention of claim 5, the back surface of the transfer tooth in the range corresponding to the formation range of the groove formed in the feed tooth is raised, and the groove is formed up to the inside of the bump so that the dimension is larger than the thickness of the feed tooth A raised pin tuck can also be formed.

According to the invention of claim 6, for example, using the zigzag sewing machine according to any one of claims 1 to 5, as shown in Fig. 10 (c),

The tension of the needle thread Y1 is increased relative to the drum thread Y2 and Y3, and the drum thread Y2 and Y3 are sewn in a zigzag pattern with the needle thread Y1 straight.

Therefore, according to the invention of claim 6, the needle thread is straight, and the north thread is composed of a zigzag-shaped seam, so that the needle thread can be easily pulled out and the seam can be easily released. By using the zigzag sewing machine according to any one of claims 1 to 5, the sewing worker can easily set the appropriate tension of the needle thread while checking the formation state of the seam.

EMBODIMENT OF THE INVENTION Next, one Embodiment of this invention is described with reference to drawings. The following is one embodiment of the present invention and does not limit the present invention. Arrow S in the figure indicates the conveying direction. 1 is an exploded perspective view showing a main component structure in one embodiment of the present invention.

As shown in Fig. 1, the zigzag sewing machine of the present embodiment has a pressing part 8, a needle plate 11a, and a feed tooth 14a as a part having a characteristic structure of the present invention.

The pressing portion 8 has a needle dropping portion 9 at the center. In addition, the guide plate 10 is vertically disposed on the bottom surface of the pressing portion 8.

The structure of the press part 8 is demonstrated here with reference to FIG. 2 shows a plan view 2a, a front view b, and a B-B cross-sectional view c of the pressing portion 8.

2, the tip of the pressing part 8 is upside down, and a cutout 18 is formed at the center thereof. In the center of the pressing portion 8, a needle dropping portion 9 is laid. Reference numerals 20a and 20b show needle dropping positions. An evacuation groove 21 is disposed on the bottom of the pressing portion. The avoidance groove 21 is located in front of the conveyance direction of the needle dropping part 9. This avoidance groove 21 is for reducing the resistance when the flat surface pulls up the needle thread so that it can be smoothly pulled up.

The guide plate 10 has a proximal end on the underside of the pressing portion 8 between the cutout portion 18 and the needle dropping portion 9, and is perpendicular to the underside of the pressing portion 8 and in the center line in the conveying direction. It is spoken in front of the transport direction S along (19). As can be seen with reference to Fig. 2 (a), the guide plate 10 is located in the middle of the needle dropping positions 20a and 20b, and is propagated from the needle dropping positions 20a and 20b to the forward direction S. The guide plate 10 has a predetermined height H, which is selected according to the raised height of the pin jaw.

This will be described with reference to FIG. 1 again. In the center of the needle plate 11a, a long hole 12a is formed in the conveying direction of the sewing material 13. The hole 12a is positioned between the left and right needle dropping positions 20a and 20b and extends long in the conveying direction S of the sewing material 13. Further, the needle penetrating portions 22a and 22b are laid on the needle plate 11a in correspondence with the left and right needle dropping positions 20a and 20b. During sewing, the needle that swings and moves up and down at predetermined positions on each of the left and right sides penetrates through the needle penetrating portions 22a and 22b. Although Fig. 1 shows that the needle through portions 22a and 22b and the hole 12a are continuous, but not limited to this, the independent needle hole does not continuously connect the needle through portions 22a and 22b to the hole 12a, respectively. You can also do

The U groove 15a is formed in the center of the feed tooth 14a which opposes the hole 12a. The tooth part 17 formed in the feed tooth 14a is inserted into the hole 16 formed in the needle plate 11a.

Next, a description will be given with reference to FIGS. 3 and 4. 3 is a cross-sectional view taken along the line A-A in FIG. 1, and FIG. 4 is a cross-sectional view taken along the line C-C in FIG. 1.

As shown in Fig. 3 (a) and (b), the teeth 17 of the feed teeth 14a or 14d are inserted into the holes 16 arranged in the needle plate 11a. The sewing material (cloth) 13 is put on the upper surface of the needle plate 11a.

As shown in Fig. 3 (a) and (b), the U groove 15a is a U-shaped groove in cross section. The inner side surface of the U groove 15a is formed to be continuous with the inner side surface of the hole 12a. In FIG. 3 (b), the back side of the feed tooth 14a is raised, and the U groove 15a is formed up to the inside of the raised portion. The whole pin tuck forming groove which introduces the pin tuck part of the sewing material (cloth) 13 in the hole 12a and the U groove 15a is comprised.

As shown in FIG. 3, the bottom surface of the pressing part 8 compresses the top surface of the sewing material (cloth) 13. In the center, the guide plate 10 presses the sewing material (cloth) 13, and corrects the sewing material (cloth) 13 to a U-shaped pin jaw shape to make it in the hole 12a and the U groove 15a. Ji is introducing into the home.

The sewing material (cloth) 13 flowing on the needle plate 11a as shown in FIG. 4 is bent downward by the guide plate 10 attached to the bottom of the pressing part 8, and the hole 12a and the U groove ( Guided in groove made in 15a).

As shown by arrows a1 to a4 in FIG. 4, the feed tooth 14a performs a peculiar feed movement that repeats each operation of feed a1, drop a2, return a3, and rise a4. Thereby, the tooth part 17 acts on the sewing material (cloth) 13 similarly to the prior art, and a conveyance force is transmitted to the sewing material (cloth) 13. In addition, in this embodiment, the inner surface of the U groove 15a also acts on the sewing material (cloth) 13, and the feed force is transmitted directly to the pin jaw portion. In this manner, the sewing material (cloth) 13 is transferred in the conveying direction S. FIG.

In FIG. 4, the position of the sewing material (cloth) 13 in C-C cross section is shown with the broken line. Reference numeral 31 is a needle. Any one point of the sewing material (cloth) 13 in the CC cross section first touches the guide plate 10, infiltrate into the hole 12a, and then into the U groove 15a, and then suture is performed. It floats on the needle board 11a from a stage. As a result, a pin tuck is formed.

Here, another form of the needle plate and the feed tooth will be described with reference to FIG. 5. 5 is a cross-sectional view corresponding to FIG. 3 for explaining another embodiment of the present invention.

In the above-described configuration, the needle plate 11a having the hole 12a and the feed tooth 14a or 14d having the U-groove 15a, but the needle plate 11b as shown in FIG. You may use a combination with the feed tooth 14b.

In the center of the needle plate 11b, as shown in FIG. The center of the back side of the needle plate is raised, and the U-groove 12b is formed to the inside of the raised portion.

The hole 15b which is not a U groove is arrange | positioned in the center of the feed tooth 14b, and the ridge of the back side of the feed tooth 14b and a feed tooth do not contact.

As shown in Fig. 5B, a combination of the needle plate 11a and the feed tooth 14c may be used.

The needle plate 11a has a hole 12a as described above. The feed tooth 14c is an existing feed tooth which does not specifically form a hole, a groove, etc. in the position which opposes the hole 12a. Such a configuration is also possible when the height of the pin tuck is low. While it cannot cope with the high pin tuck of the towering height, there is an advantage that the existing feed dog can be used as it is.

Next, the sewing method using the zigzag sewing machine provided with the above-mentioned press part, a needle plate, and a feed tooth is demonstrated.

In the zigzag sewing machine according to the present embodiment, one needle 31 and the needle 31 are left and right as shown in FIG. 7 together with the pressing portion 8, the needle plate 11a, and the feed tooth 14a described above. And a pair of horizontal drums (33, 34) arranged to the left and right to correspond to the vibration width of the needle (31) and rotating in opposite directions. The needle plate 11a is disposed above the middle portion of the horizontal books 33 and 34. The manufacturing method described next is disclosed in Japanese Patent Laid-Open No. 9-299631.

First, a manufacturing method on the premise will be described with reference to FIGS. 6, 7 and 8.

The seam of this sewing machine is composed of three threads of one needle thread (upper thread) Y1 and two bobbin thread (bottom thread, drum thread) Y2 and Y3 as shown in FIG.

The needle thread Y1 is shaken from side to side and alternates with each bobbin thread Y2 (Y3) to interlacing another thread (the thread intersects another thread or another loop). That is, the loop of the needle thread Y1 exits the fabric F from the needle side, and the other side of the bobbin thread Y2 is laced on the back side thereof. Thereafter, the needle thread Y1 is pulled up so that an intersection portion of the needle thread Y1 and the bobbin thread Y2 comes in the middle portion of the thickness of the cloth F. Next, the needle thread Y1 is shaken to the side corresponding to the other bobbin thread Y3 to exit the fabric F, and the other end of the yarn thread is different from the bobbin thread Y3 on the back side. Thereafter, the needle thread Y1 is pulled up so that the intersection of the needle thread Y1 and the bobbin thread Y3 comes in the middle of the cloth thickness.

When the above operation is continuously performed in a state where the transfer feed pitch is quantitatively set, the surface becomes a zigzag sewing, and the back side becomes a two-needle lactitch. 6, although the oscillation width | variety to the left and right of the needle thread Y1 is constant, you may change regularly.

The sewing sewing machine is provided with a zigzag sewing arm that includes a needle vibration mechanism for shaking the needle bar 32 having one needle 31 shown in FIG. 7 to the left and right, and the vibration width of the needle 31 in the bed. The horizontal book 33 rotating around the right side and the horizontal book 34 rotating around the left side are disposed one at a corresponding position.

The female body having the needle vibrating mechanism described above is well known and its detailed description is omitted.

First, in the arm, the vibration width of the needle 31 is set similarly to having the conventional needle vibration mechanism. Then, the drum 33 on the right side is positioned (north-aligned) such that the pointed end 33a passes through the right side of the needle drop position as shown in FIG. 8.

Further, the needle 31 is moved to the left as shown by the dashed-dotted line in FIG. 7, and the drum is aligned with the left drum 34. At this time, in the conventional two-needle sewing machine, since the egg parts of each needle are located on the outside of each other, the needle thread loop is formed on the outside of each needle, so that the pointed ends 34a may be positioned to pass to the left of the needle dropping position. However, in this sewing machine which shakes from side to side with a single needle 31, the needle part 31a of the needle 31 is on the right side, so the needle seal can be on the right side of the needle at any position. It is necessary to align 34a so as to pass to the right of the needle drop position as shown in FIG. Even so, not only it (the conventional drum) but also the drum 34 should allow the needle 31 to descend to the left of the pointed tip 34a. That is, it is necessary to open the pointed end 34a to the outside and widen the gap between the pointed end 34a and the main body so that the pointed end 34a does not touch the needle 31 while lifting the needle thread loop. There is. In addition, A1 and B1 in FIG. 7 are the passing positions of the pointed ends 33a and 34a, respectively.

In the sewing machine having such a configuration, for example, the needle 31 is shaken to the right, and a needle thread loop is formed on the egg part 31a side of the needle 31 when the needle 31 moves out of the fabric and slightly rises. The needle thread loop is lifted by the pointed end 33a of the drum 33 on the right side, and the needle thread exits around the drum 33 and extends from the bobbin in the drum 33 as the pointed tip 33a rotates. Racing the bobbin room (Y2) and another room. Thereafter, the needle thread is pulled up by the rise of the needle 31 and the cloth, and the intersection between the needle thread and the bobbin thread moves to the middle portion of the cloth thickness. Next, the needle 31 is shaken to the left, and the same operation on the right side is performed, but the needle dropping position is the gap on the left side of the pointed tip 34a of the drum 34 on the left side as shown in FIG. It is lifted by its pointed end 34a. And after a while the needle 31 is raised, so the pointed tip 34a may rotate around the left side without touching the needle 31. In other operations, the needle thread is different from the bobbin thread Y3 in the drum 34, as in the left side, and the intersection moves to the middle of the cloth thickness. The seam shown in FIG. 6 is formed by repeating this series of operations continuously.

Next, a method of forming the pin tuck will be described with reference to FIGS. 9 and 10.

As described in Fig. 9 (a), the above-described sewing operation is performed with the left and right sides of the pin tuck portion formed in the U-shaped pin tuck shape by the guide plate 10 as the needle dropping position. That is, the range of the needle vibration width G is adjusted so that the pin jaw travels. The above-mentioned sewing operation is performed by adjusting the vibration width G.

Then, as shown in Fig. 9 (b), a seam in which the needle thread (Y1) is sewn in a zigzag pattern is formed. The seam formed at the time of sewing can be visually confirmed from the needle dropping part 9 in real time.

The perspective view of the pin tuck after sealing is shown to FIG. 10 (a), and the top view of the seam is shown to FIG. 10 (b). Fig. 10 (c) shows the seam when the needle thread Y1 is straightened by increasing the tension of the needle thread Y1. As shown in Figs. 10A and 10B, the needle thread Y1 is zigzag in both sides of the pin tuck 40 in a zigzag shape, so that the bobbin threads Y2 and Y3 are in a straight line, respectively. Becomes sewn seam.

In the case where the tension of the needle thread (upper thread) Y1 is strongly set and the tension of the bobbin thread (bottom thread, drum thread) Y2, Y3 is set weakly, a straight needle thread Y1 as shown in Fig. 10 (c). ), The right bobbin room (Y2) and the left bobbin room (Y3) alternate between the seams. In the case of the present invention, since the seam is formed on the upper surface of the sewing material (cloth) 13 so that the seam can be confirmed from the needle dropping part 9, the tension for loading the needle thread Y1 necessary for making the straight line It can be adjusted easily and quickly. Such a suture method can be easily loosened and used as a test needle. After use as a test needle, the needle thread (Y1) can be easily pulled out by tensioning with the end of the needle thread (Y1) first, and then the right bobbin thread (Y2) and the left bobbin thread (Y3) can be easily unscrewed. have. The pin tuck can be formed by fixing a pin tuck shape by performing a predetermined heat treatment in the state of tacking, and then unscrewing.

The sewing method that is difficult to unsew is the intersection (nodal point) between the needle thread Y1 and the right bobbin thread Y2 and the needle thread Y1 and the left bobbin thread Y3 as shown in Fig. 10 (a) (b). The intersection point (nodal point) is a method of making a seam located in the center of thickness of the sewing material (cloth) 13. This seam can also be realized by adjusting the tension of the needle thread Y1, the right bobbin thread Y2, and the left bobbin thread Y3.

Since the above seam can be visually confirmed from the needle dropping part 9, which is a window laid in the center of the pressing part 8, the operator can work while checking the seam balance. In addition, there is an advantage that the mounting force is adjusted while checking. Therefore, according to this embodiment, even if it is a seam which is easy to loosen stitching like FIG. 10 (c), it is also free to set it as a seam which is difficult to loosen stitching like FIG.

As described above, according to the invention described in each claim, a part of the sewing material is corrected into a pin tuck of a U-shaped cross section by a guide plate, and the U-shaped pin tuck is formed to hang on the bottom of the sewing material. Regardless, the sewing material is uniformly sent and the pin tuck shape is stabilized, and there is no sewing wrinkles or twists on the pin tuck shape, and thus, the uniform and clean pin tuck can be easily and effectively and stably sewn.

Moreover, not only straight lines but also curved pin jaws can be sewn simply without breaking the uniformity.

In addition, since the seam of the pin tuck (nodal point between the upper thread and the lower thread) is formed on the upper side of the sewing material, the sewing worker can proceed to the pin tuck sewing work while checking the finish state of the pin tuck seam so that the problem of suture can be found quickly. It works.

Since another upper thread is not lifted by another drum, a sharp tip can be easily performed, and the disturbance of the thread tension caused by the two yarns being lifted by one drum can be eliminated.

In addition, according to the invention described in claim 2, the groove is formed shallower than the plate thickness of the needle plate, and there is an effect that a pin tuck having a raised height having a larger dimension than the plate-shaped plate thickness can be formed.

In addition, according to the invention described in claim 3, since the hole formed in the needle plate is used for forming the pin tuck, the raised height of the pin tuck to be sewn can be sewn even if the height is relatively high with respect to the thickness of the needle plate. Since the feed force can be imparted to the lower end of the pin jaw by the feed teeth, the feed force can be directly applied to the pin jaw, and the entire sewing material can be more uniformly conveyed.

In addition, according to the invention of claim 4, the depth of the entire pin jaw forming groove consisting of a hole disposed in the needle plate and a groove disposed in the feed tooth is deeper than the plate thickness of the needle plate, so as to rise from the plate thickness of the needle plate. It is effective to sew high pin chin of height.

In addition, the inner surface of the groove disposed in the feed teeth in contact with the lower end of the pin jaw portion can directly apply the feed force to the pin jaw portion, there is an effect that the entire sewing material can be transferred more uniformly.

In addition, according to the invention described in claim 5, since the groove is formed deeper than the thickness of the feed tooth, there is an effect that can form a high pin jaw of the towering height.

In addition, according to the invention described in claim 6, the needle thread is straight, and the north thread is composed of a zigzag-shaped seam, so that the needle thread can be easily pulled out and sewing can be easily released. In addition, the sewing worker has an effect that can easily set the tension of the appropriate needle thread while checking the formation of the seam.

Claims (7)

A needle vibration mechanism that shakes the position of one needle to the left and right, A pair of horizontal drums arranged left and right corresponding to the vibration width of the needle and rotating in opposite directions; A needle plate which extends in a long length in the conveying direction of the sewing material and opens on an upper surface between the left and right east and west positions of the needle, and which is disposed above the pair of horizontal books; A feed tooth disposed below the needle plate and sending a sewing object in a direction orthogonal to the needle vibration direction; And a guide plate for allowing the object to be bent in a U-shape to be inserted into the groove from the upper side of the needle plate, and having a crimping portion for pressing the sewing material placed on the upper surface of the needle plate. Pintack forming apparatus by a zigzag sewing machine. The method of claim 1, The back surface of the needle plate in the range corresponding to the formation range of the groove is raised, the groove is formed to the inside by the raised, Pin jaw forming apparatus by a zigzag sewing machine, characterized in that a hole is formed in a range facing the raised teeth in the transfer tooth. A needle vibrating mechanism that shakes one needle's shanghai east and right positions, A pair of horizontal drums arranged left and right corresponding to the needle vibration width, and rotating in opposite directions; A needle plate formed between the left and right positions of the needle and extending in the longitudinal direction in the sewing direction and formed above the pair of horizontal drums; A feed tooth disposed under the needle plate and cooperating with a bottom surface of the pressing part to send the sewing material in a direction orthogonal to the needle vibration direction; The guide plate is arranged so that the sewing object can be bent into the hole from the upper side of the needle plate so as to bend the U-shaped downward, and has a crimping portion for pressing the sewing material placed on the upper surface of the needle plate. Pin jaw forming device by a zigzag sewing machine characterized in that. The method of claim 3, wherein A pin jaw forming apparatus by a zigzag sewing machine, characterized in that the groove is arranged in the conveying tooth long groove in the conveying direction of the sewing object facing the hole. The method of claim 4, wherein A pin tuck forming apparatus by a zigzag sewing machine, characterized in that the back surface of the transfer tooth having a range corresponding to the formation range of the groove is raised, and the groove is formed up to the inside of the bump. The method of claim 1, A pin tuck forming apparatus according to a zigzag sewing machine characterized by increasing the tension of the needle thread relative to the drum thread, and forming the seam in a zigzag shape with the needle thread in a straight shape. The method of claim 3, wherein A pin tuck forming apparatus according to a zigzag sewing machine characterized by increasing the tension of the needle thread relative to the drum thread, and forming the seam in a zigzag shape with the needle thread in a straight shape.