JPH03218793A - Sewing method and device for sewing machine - Google Patents

Abstract

PURPOSE:To prevent a thread from being variably tightened by the creases of a curved part and to sew a bag-shaped object at an exact sewing position by executing main sewing while entwining loops to be formed by the sewing thread of an inner sewing machine, for which a sewing needle is inserted to the bag-shaped object to be sewn such as a pocket, etc., and of a manual type sewing machine for which a sewing needle is inserted through both front and rear sides of cloth for the body. CONSTITUTION:An inner sewing machine needle 5 is reciprocatively moved between the inside and outside of a pocket 2 vertically to the pocket edge and at a moment when the needle 5 is moved from the edge of the pocket 2 to the outside and goes into the inside of the pocket 2 again, a loop 8 is formed by a sewing thread 5a of the inner sewing machine on the outside of the pocket 2. At such a time, a manual type sewing machine needle 6 is moved in the upper direction of cloth 1 for the body and goes through the loop 8 and a remaining sewing thread 6a of the manual type sewing machine is swept away to the front side of the cloth for the body by a looper 9. Then the loop 8 is tightened by the needle thread take-up of the inner sewing machine and a contact is formed at a needle position 10. Afterwards, the needle 6 is passed through the same needle position 10 and moved in the lower direction of the cloth for the body, the remaining thread 6a of the manual type sewing machine is swept away to the rear side of the cloth for the body by a looper 11 and one type of sewing is finished.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sewing method and device for a sewing machine, more specifically,
The present invention relates to a sewing method and device for a sewing machine that sews a bag-shaped object to body fabric.

[Prior Art 1] Conventionally, when sewing a bag-shaped object to be sewn (for example, a pocket) onto body fabric by lock stitching, the inside stitching of the pocket is performed using a blind stitch sewing method. Blind stitching is a method of sewing by skimming the thickness of the workpiece so that the seam does not appear on the surface of the workpiece. Because the seam does not appear on the surface of the workpiece, it is also called "blind stitching" or "blind stitching." There is. This cross-stitching is used for attaching pockets to body fabrics, folding collars for clothes, and edging various ordinary clothes and coats.

[Problem to be Solved by the Invention] When sewing a pocket onto body fabric using blind stitching, three sides of one piece of fabric are folded in, the two bottom corners are curved, and the folded part of the curved part is used to form a pocket. It becomes easier for me to occur. In the case of blind stitching, since sewing is performed by scooping the sewing machine needle, there is a problem in that when the thickness of the object to be sewn changes, the amount of scooping changes, resulting in uneven thread tightness. Particularly in the case of blind stitching, it is difficult to accurately determine the sewing position, and the position of the sewing thread connection point suddenly occurs as a loop of thread under the fabric, making the thread tightness unstable.

Furthermore, when sewing a pocket, the sewing is usually done at the folded edge of the pocket. When using blind stitch,
In order to scoop from the back side of the pocket, the curved part of the pocket is sewn to the inside of the edge of the pocket, leaving some allowance when sewing, and as a result, the curved part of the pocket becomes baggy.

Therefore, the present invention has been made to solve these conventional drawbacks, and provides a sewing machine that can accurately and stably sew bag-like objects such as pockets. That is the issue.

[1,000 Steps to Solve the Problems] In order to solve the above problems, the present invention provides a sewing method for a sewing machine that sews a bag-shaped object to body fabric.
The first sewing machine needle is moved back and forth between the inside and outside of the bag-shaped workpiece, and when the first sewing machine needle returns to the inside of the workpiece, the thread of the first sewing machine needle is exposed to the outside of the workpiece. forming a loop with a second sewing needle, brushing off the remaining thread of the second sewing needle and passing the second sewing needle through the formed loop through the body fabric, and when the second sewing needle passes through the loop; The second sewing machine needle is formed by brushing off the remaining thread of the second sewing machine needle and moving the second sewing machine needle through the outside of the loop to the opposite side of the body fabric. A stitch is formed by intertwining the loops of the threads of the sewing machine needle No. 2 and the first sewing machine needle, and then, when sewing a straight line, the bag-shaped object to be sewn is moved, and the sewing machine needle 2 is sewn with the thread of the first sewing machine needle. When sewing, the bag-shaped object is sewn onto the body fabric by moving the object to be sewn and moving the first sewing machine needle and repeating the above operations to form stitches in sequence.

Further, in the present invention, in a sewing device for a sewing machine that sews a bag-shaped object to be sewn onto a body fabric, a fixing device for fixing the bag-shaped object to be sewn and the body fabric; An internal sewing machine capable of forming a loop of sewing thread on the outside of a workpiece by an inserted sewing machine needle that moves back and forth between the inside and outside of the workpiece, and passing through the loop when moving to one side. Then, when moving to the opposite side, the loop is removed and the sewing machine needle is passed to both the front and back sides of the body fabric, and the sewing machine needle is passed to each side of the body fabric. A means of paying the person to whom the needle was handed,
Means for moving the internal sewing machine in a predetermined direction relative to the bag-shaped object to be sewn, and means for moving the fixing device relative to the hand sewing machine are provided, and the sewing thread of the internal sewing machine is When the loop formed by the needle of the hand-sewn sewing machine is moved to the opposite side of the fabric, a stitch is formed by the intertwining of the loop of the sewing thread of the internal sewing machine, and then when sewing a straight line, the fixing device is attached to the hand-sewn sewing machine. When sewing a curved line, the bag-shaped object to be sewn is moved and the inner sewing machine needle is moved to form the next stitch, thereby sewing the bag-shaped object to the body fabric. did.

[Function 1] In such a configuration, the sewing machine needle of the internal sewing machine is inserted into a bag-shaped object to be sewn, such as a pocket, and the sewing machine needle is moved back and forth between the inside and outside of the pocket. When the sewing machine needle exits the pocket and returns to the inside, a loop is formed in the sewing thread of the internal sewing machine. The present invention uses a hand-sewn sewing machine in which the sewing machine needle passes through the front loop when moving to one side of the body fabric, and removes the loop when moving to the opposite side of the body fabric. provided.

The sewing machine needle of this hand sewing machine is passed through a loop formed on the outside of the pocket, and the sewing thread is moved to one side (front side) of the body fabric. When the sewing machine needle of the hand-sewn type sewing machine passes through the loop, the sewing thread of the hand-sewn type sewing machine is swept to the front side, and the sewing machine needle is moved to the opposite side (back side) of the body fabric through the outside of the loop. At this time, preferably, the loop is tightened using the thread take-up lever of the internal sewing machine, so that the sewing machine needle of the hand-stitched sewing machine is dropped at the same needle position.

Next, lockstitching is performed using double-sided sewing thread by sweeping away the remaining sewing thread from the hand sewing machine on the back side of the body fabric. After the first stitch is finished, the fixing device is moved relative to the hand sewing machine when sewing a straight line, and when sewing a curved line, the bag-shaped object to be sewn is moved and the internal sewing machine needle is moved. to form the next seam. These operations are repeated to form seams in sequence and the pocket is sewn onto the body fabric.

[Example] Hereinafter, the present invention will be described in detail according to an example shown in the drawings.

(a) Principle of operation FIG. 1 shows the operation steps for sewing a bag-shaped object 2 such as a pocket (hereinafter simply referred to as a pocket) 2 on body material 1. As shown in FIG. 1(A), the pocket 2 is pressed against the body fabric 1 via the fixing plate 3, and lockstitch sewing is started using the sewing machine needle 5 of the internal sewing machine and the sewing machine needle 6 of the hand-stitch sewing machine. be done.

First, the internal sewing machine needle 5 moves back and forth between the inside and outside of the pocket 2 perpendicular to the pocket edge, and the internal sewing machine needle 5 moves from the edge of the pocket 2 to the outside as shown in FIG. 1(B). The moment it moves and enters the inside of the pocket 2 again as shown in FIG. At this time, the hand-sewn sewing machine needle 6 moves above (to the front side) of the body material 1 and passes through the loop 8 as shown in FIG. 1(D). When the hand-sewn sewing machine needle 6 passes through the lube 8, the remaining sewing thread 6a of the hand-stitched sewing machine is swept onto the front side of the body fabric by the louver 9 (Fig. 1 (E)). (not shown), the lube 8 is tightened and a connection point is formed at the needle position lO (FIG. 1(F)).

Thereafter, as shown in FIG. 1(G), the hand-sewn sewing machine needle 6 passes through the same needle position IO and moves to the lower part of the body fabric (
Move to the back side). At this time, since the lube 8 is tightened by the thread take-up, the sewing thread 6a of the hand-sewn sewing machine passes through the outside of the connection point. The hand-sewn type sewing machine needle 6 moves downward, and the remaining thread 6a of the hand-sewn type sewing machine is swept away by the louver 11 on the back side of the body fabric (FIG. 1(H)).

After completing one stitch in this manner, the pocket 2 and body fabric 1 are moved, and the process returns to FIG. 1(B) and the same operation is repeated to form the next stitch. These operations are repeated to form seams in sequence, and the pocket 2 is sewn onto the body fabric l.

Figure 1 (I) schematically shows the movement of the sewing thread 5a of the internal sewing machine needle 5 and the sewing thread 6a of the hand-sewing type sewing machine needle 6. is the second
Illustrated in the figure. In FIG. 2, the entire sewing machine device is composed of a fixing device 20 for fixing the pocket onto the body material, an internal sewing machine 3o, and a hand-sewing type sewing machine 50.

The fixing device 2o has a pocket fixing plate 25 whose periphery is fixed to a U-shaped leg 24, as shown in detail in FIG. 3, and this U-shaped leg 24 is attached to the presser foot 2I. Presser foot 2
The extension portion 22 of the presser foot 2l is fixed to a rod 23a of a presser foot lifting cylinder 23 housed and fixed in a case 27, and the entire fixing device including the presser foot 2l and the pocket fixing plate 25 can be raised and lowered in response to the operation of the cylinder 23. It is configured as follows.

When the cylinder 23 is activated and the fixing device 20 is moving upward, the U
The fixing plate 25 is inserted so that the U-shaped leg 24 is placed, and then the fixing device is lowered to press the body material 1 and the pocket 2 against the sewing machine table 15 using the U-shaped leg 24. The internal state when pressed is shown in FIG. When the inside of the pocket is folded in, the folded part 2a has a little thickness, so the U-shaped leg 24 and the fixed plate 25 have a level difference corresponding to that amount, and when the cylinder 23 is lowered, the fixed part 25 is The U-shaped leg 24 presses down the folded portion 2a of the pocket, and the pocket 2 and the body fabric 1 are pressed against the sewing machine table 15 as a whole.

The internal sewing machine 30 has an L-shaped sewing machine main body 3l, one end 31a of which is inserted into the inside of the pocket 2, and the other end 3l
In b, the X-Y table 8o attached to the mounting base 32 of the table 15 is coupled to the connecting portion 31c.

Two types of motors 4l and 42 are attached to the main body 3l of the internal sewing machine, as shown in FIGS. 5(A) and 5(B). The motor 4l rotates a cam 35 attached to the tip 31a of the sewing machine body via a timing belt 33, and the motor 42 rotates a gear 39 meshing with a turntable 37 via a timing belt 34.

The sewing machine needle 38 of the internal sewing machine is attached to a holder 36, and this holder 36 is attached in contact with the cam 35, so when the motor 4l rotates, the cam 35 rotates, and the holder 36 and the holder 36 rotate accordingly. The attached sewing machine needle 38 reciprocates as shown by the double arrow.

Further, when the motor 42 is operated, the turntable 37 is rotated via the gear 39, so that the holding table 36 and the sewing machine needle 38 can be rotated around the shaft 35a.
In this case, the cam 35 and the turntable 37 are coaxial (35
Since it is the rotation axis of a), even when the turntable 37 is rotated, there is no effect on the reciprocating motion of the holding table 36 and the sewing machine #F38. However, regarding the problem that the phase of the reciprocating motion is shifted, adjustment is made using the motor 4l.

Further, a thread take-up 4o is arranged on the body 3l of the internal sewing machine, and the sewing thread 38a is guided from a thread supply source (not shown) to the sewing machine needle 38 through the thread take-up 40 via a tension roller. In addition, 43 is a motor that drives the balance 40, and FIG. 5(C) is a side view from the A direction of FIG. 5(B).

The hand sewing machine 50 is a sewing machine that achieves the same sewing style as hand sewing by passing the sewing machine needle up and down the fabric, and as shown in FIG. An upper looper 56 is fixed to the tip of a shaft 54a which is rotatably supported on the machine frame of a hand-sewn sewing machine 50 which is rotated by a motor 5l, and an upper looper 56 is rotatable via a belt 53 to the machine frame of a table l5 which is rotated by a motor 5l. It has a lower louver 57 fixed to the tip of a shaft 55a supported by the lower louver 57. As shown in detail in FIG. 6, the upper looper 56 is arranged on the sewing machine table I5, and the lower louver 57 is arranged below the sewing machine table I5, so that they are offset by a predetermined angle. There is. Also, 54 and 5
Reference numeral 5 denotes an upper drum and a lower drum, which are fixed to the machine frame of the hand-stitch sewing machine 50 and the machine frame of the table 15, respectively, and have shafts 54a and 55a passing through their central parts. This thread is guided to the outer peripheral surface of each drum. It has an internal chuck (not shown) for holding the sewing machine needle 60 of the hand-sewn sewing machine that has passed through the pocket 2 and the body material l in close proximity to the upper drum 54 and the lower drum 55, respectively, and also in the direction of the double arrow. An upper cylinder 58 and a lower cylinder 59 that are movable up and down are arranged. A sewing thread 60a is passed through the sewing machine needle 60,
A thread clamp 6l for clamping the sewing thread 60a onto the sewing machine table and a cylinder 62 for operating the thread clamp 6l are provided below the sewing machine table l5.

This hand-sewn sewing machine is provided with a thread tension mechanism 63 that generates tension in the thread 60a when the thread 60a is swept away by the lower looper 57 to improve the tightness of the thread, as will be described later. This mechanism 63 consists of an upper tension plate 64 and a lower tension plate 65, which are supported on the machine frame of the hand-sewn sewing machine 50 so as to be movable up and down, as shown in FIG. 7(A).
The lower tension plate 65 is fixed to a support plate 68 fixed to the machine frame of the hand sewing machine 50,
Further, the upper tension plate 64 can be rotated around the frame of the hand-sewn sewing machine 50 by rotation of an eccentric cam, that is, a tension cam 70 (FIG. 7(C)) fixed to the shaft 54a on the back of the upper drum 54 shown in FIG. Cam Follow 7
When the upper looper 56 rotating through the thread 60a scoops up the thread 60a (when the sewing machine needle 60 rises and the upper cylinder 58 receives it), it is lifted upward as shown in FIG. 7(B). It is configured. Thread 60 as described later
Figure 7 (
The upper and lower tension plates are closed as shown in A), and the thread 60
It is designed to apply tension to the thread by sandwiching a. Further, 58a is a holding member that holds the upper cylinder 58 and is movable up and down. Then, the holding member 58a moves downward to transfer the sewing machine meter 60 from the upper cylinder 58 to the lower cylinder 59 held by another holding member. Furthermore, a holding member that holds the lower cylinder 59 transfers the sewing machine needle 60 from the lower cylinder 59 to the upper cylinder 58.

In the embodiment of the present invention, the X-Y table 80 is used to feed the internal sewing machine, and the X-Y table 80 is used to feed the body fabric and pocket sewing materials.
An 80° Y table is used.

Since the configurations of these X-Y tables 80 and 80° are the same, FIGS.
is schematically illustrated. An X-direction motor 8 is used to move the X-Y table 80 freely in the X-Y direction.
1. A Y direction motor 82 is provided. Both motors rotate an X drive shaft 85 and a Y drive shaft 86 via drive belts 83 and 84, respectively. Carriage plate 8 is attached to the X drive shaft.
7 is wound around the carriage belt 88, so when the X drive shaft 85 is rotated by the X direction motor 81, the carriage plate 87 can move in the X direction as shown.

Further, the Y drive shaft 86 has Y direction pelts 89 on both ends thereof.
90 is wound around this belt, and a carriage belt 88 is wound around this belt.
is attached, so that the Y drive shaft 86 is connected to the Y direction motor 8.
2, the carriage plate 87 can move in the Y direction as shown.

When the X-Y table having such a configuration is used for feeding body fabrics and pockets to be sewn, the presser foot 26 connected to the fixing device 20 is attached to the carriage plate 87 (FIG. 2). X. By driving the Y-direction motor, the sewing object can be moved relative to the sewing machine table 15 and the hand-sewing type sewing machine 50. The feed is made when the hand-sewn type sewing machine needle 60 is below the sewing machine table 15.

Moreover, this X-Y table allows the internal stitch sewing machine 30 to be Y
In this case, the X-Y table 80 is stored in the mounting base 32 of the internal sewing machine, and the internal sewing machine body 3 is mounted on the carriage plate 87 (Fig. 2).
1 is fixed with a connecting portion 31c (Fig. 3). The internal sewing machine is moved when the internal sewing machine needle 38 is in the pocket. C) Description of the operation used when sewing the curved portion of the pocket Next, the operation of the sewing device configured as described above will be explained.

First, actuate the cylinder 23 of the fixing device 20 to move the entire fixing device 20 upwards, insert the fixing plate 25 so that the U-shaped leg 24 is above the folded part 2a inside the pocket 2, and then Then, the fixing device is lowered and the U-shaped leg 24 presses the body material 1 and the pocket 2 against the sewing machine table 15 (FIGS. 2 and 3).

Next, the X-Y table 80 moves the fixing device 20.
The fixing device is moved in a predetermined direction by moving the pocket 2 and the garment I to be sewn to the sewing position S.

Similarly, the X-Y table 80 of the internal sewing machine 30 is operated to move a total of 38 internal sewing machines to corresponding positions.

9(A) to 9(M) illustrate the state of each sewing process, and since one cycle of operation starts from FIG. 9(E), the description will start from this state. In FIG. 9(E), the needle 60 of the hand-sewing type sewing machine is positioned below objects to be sewn, such as a pocket and body fabric (none of which are shown in FIG. 9), and is held by a lower cylinder 59. One end of the sewing thread 60a of the hand-stitched sewing machine is clamped by a thread clamp 6l on the lower side of the workpiece, and the remaining thread is on the upper side of the workpiece, forming a loop 60b on the lower side of the workpiece. 6. The lower looper 57 rotates clockwise and passes through the loop 60b of the sewing thread 60a at the position shown in FIG. 9(F).
The internal sewing machine needle 38 comes out after passing through the position shown in Fig. 9 (H).
). Note that when the hand sewing machine needle 60 is below the sewing machine table 15 at the positions shown in FIGS. 9(E), (F), and (G), the workpiece is fed by the 80° ), the feed stops and the internal sewing machine needle 38 moves as shown in the figure, and then reaches the position shown in Figure 9 (I), where it completely scoops up the remaining thread 60a of the hand-stitched sewing machine and moves it downward. .

During this time, the needle 38 of the internal sewing machine is moved by the motor 41 (Fig. 5).
It moves to the left in FIG. 9 (G) while being driven by the sewing machine, and at the time of FIG. 9 (H), it goes outside and forms a loop 38b on the outside of the pocket with the sewing thread 38a of the internal sewing machine, and then closes the pocket again. (Fig. 9(I)).

In FIG. 9(I), the lower cylinder 59 of the hand-sewn sewing machine 60 moves upward. At this time, the lower cylinder 59
rises, and a total of 60 passes through the lube 38b, passes through it, and is delivered to the upper cylinder 58. Subsequently, the upper cylinder 58 rises and the sewing machine needle 60 moves to the lube 38b.
(Figure 9 (J)).

During this time, the soil looper 56 rotates clockwise, as shown in FIG.
Proceed to steps I) to (M) and thread 60 sewing threads at the position shown in Figure 9 (L).
It scoops up the lube 60b of a and reaches FIG. 9(M). Subsequently, the upper looper 56 passes through FIG. 9(A) and completely scoops up the sewing thread 60a upward at the position shown in FIG. 9(B).

By pulling up the thread at the position shown in FIG. 9(B), the thread take-up 40 (FIG. 5(A)) of the internal sewing machine is activated to tighten the lube 38b of the sewing thread 38a of the internal sewing machine. Subsequently, as shown in FIG. 9(C), the upper cylinder 58 descends, and the hand sewing machine 60 falls to the same sewing position S. At this time, the lube 38b of the sewing thread 38 of the internal sewing machine is tightened and moved to the right, so that a total of 60 threads of the hand-stitched sewing machine pass outside the lube 38b, so that the sewing thread 60a of the hand-stitched sewing machine is shaped like the lube 60b. As a result, it becomes entangled with the lube 38b. Thereafter, in FIG. 9(D), the hand sewing machine needle 60 is passed from the upper cylinder 58 to the lower cylinder 59, and one cycle is completed. At this time, both the lubes 38b and 60b are tightly tightened together and enter the next cycle, and a straight seam N is sequentially formed by lock stitching.

The thread clamp 6l is used to clamp the first few stitches to prevent the sewing thread 60a of the hand-sewn sewing machine from slipping out at the beginning of sewing.

Next, sewing of the curved portion of the pocket 2 and the body fabric 1 will be explained. That is, the locus of the center of rotation K of the inner stitch sewing machine when sewing a straight line with a predetermined sewing pitch P is shown in FIGS.
C). (1) The center of rotation K is X-Y
-r-Pull 80, corresponding to the sewing position S of 80°, the internal stitch sewing machine advances in the Y direction, bends at a right angle at angle 0, moves in the X direction, then bends at a right angle again and moves in the Y° direction. do.

When the internal sewing machine comes to the corner O and sews the curved part W of the pocket, the steps shown in FIGS. 9(E) and (F). At the position (G), the workpiece is moved by the X-Y table 80°, the internal sewing machine needle is moved by the X-Y table 80, and the motor 42 shown in FIG. 38 must be rotated to change the direction of the needle according to its shape. Figure 10(A) shows the curved part W of this pocket.
A case is shown in which the radius c (radius of curvature) is equal to the rotation radius of the internal sewing machine.

On the other hand, if the rotation radius of the internal sewing machine is smaller than the radius of the pocket curved part as shown in Fig. 10(B),
The center of rotation of the internal stitch sewing machine is from this O to 0 degrees.
Try to proceed along the ゜. In addition, when the rotation radius of the internal sewing machine is larger than the radius of the pocket curved portion as shown in FIG. II! is operated and the internal sewing machine 30 is tilted at 45 degrees with respect to the X direction! from O to 01 along L, and motor 4 at that Ol.
2 to rotate the internal sewing machine needle by a predetermined angle. Thereafter, the process proceeds in the same manner as 02, 03, . After sewing the apex Wl of the curved part, On-1. ...02, O
Return to the reverse direction of 1 and 0 to finish sewing the curved part. In this way, the curved portion of the pocket can be sewn satisfactorily at a predetermined pitch no matter what value d the radius of the curved portion of the pocket is relative to the rotational radius of the internal sewing machine.

[Effects of the Invention] As explained above, according to the present invention, there is an internal sewing machine in which a sewing machine needle is inserted into a bag-like object to be sewn such as a pocket, and a hand sewing machine in which a sewing machine gauge is passed on both the front and back sides of body fabric. A pattern sewing machine is installed and lockstitching is performed by intertwining the loops formed by the sewing threads of both sewing machines, so the thread tightness does not change due to wrinkles in the curved part of the pocket, and the internal stitching machine also stitches the pocket as it is sewn. Since the needle moves inside the pocket and reciprocates in and out of the pocket, the sewing position can be ensured. Furthermore, in the present invention, the pocket is sewn onto the body fabric by lock stitching, so that good sewing is ensured even if the thickness of the fabric changes.

[Brief explanation of drawings]

FIGS. 1(A) to (I) are explanatory diagrams illustrating the steps of the sewing method according to the present invention, FIG. 2 is a perspective view showing the overall configuration of the sewing device according to the present invention, and FIG. FIG. 4 is a perspective view showing the configuration of a fixing device that fixes the pocket. FIG. 4 is a sectional view showing the inside of the pocket. FIGS. A cross-sectional view, a side view from eight directions, FIG. 6 is a side view showing the configuration of the hand-sewn sewing machine, and FIGS. 7 (A), (B), and (C) show the tension on the sewing thread of the hand-sewn sewing machine, respectively. 8(A) and 8(B) are a perspective view and a front view of the thread tension mechanism, and an explanatory view of the tension cam, etc.; FIGS. Figure 9 (
A) to (M) are explanatory diagrams explaining the sewing operation according to the present invention, and FIGS. It is. I...Body fabric 2...Pocket 5...Inner stitch sewing machine needle 6...Inner stitch sewing machine needle 20--Fixing device 30--Inner stitch sewing machine 38...Inner stitch sewing machine needle (No. 1 sewing machine needle) 42...
Motor (means for changing a predetermined angle) 50...Hand-sewing type sewing machine 56...Upper looper (means for sweeping) 57...Lower looper (means for sweeping) 60...Hand-sewing type sewing machine needle (second sewing machine SF) 80
, 80'-X-Y table cow. Figure 10 (A) Figure 10 (B)

Claims (1)

[Claims] 1) A sewing method of a sewing machine for sewing a bag-like object to be sewn onto body fabric, comprising: reciprocating a first sewing machine needle between the inside and outside of the bag-like object; When the sewing machine needle returns to the inside of the workpiece, it forms a loop with the thread of the first sewing machine needle on the outside of the workpiece, sweeps away the remaining thread of the second sewing machine needle, and then closes the second sewing machine needle. passing through the formed loop through the body fabric; when the second sewing machine needle passes through the loop, brushing off the remaining thread of the second sewing machine needle and passing the second sewing machine needle through the outside of the loop; Move it to the opposite side of the body fabric, and then form a stitch by entwining the loop formed by the thread of the second sewing machine needle and the first sewing machine needle, which is formed by brushing off the remaining thread of the second sewing machine needle. Then, when sewing straight lines, move the bag-shaped object to be sewn,
A sewing machine characterized in that, when sewing a curved line, the object to be sewn is moved and the first sewing machine needle is moved, and the above operation is repeated to form stitches in sequence and sew the bag-shaped object to the body fabric. sewing method. 2) A sewing device for a sewing machine that sews a bag-shaped object to be sewn onto body fabric, comprising: a fixing device that fixes the bag-shaped object to be sewn and the body fabric; and a fixing device inserted into the bag-shaped object to be sewn. An internal stitch sewing machine is capable of forming a loop of sewing thread on the outside of a workpiece by a sewing machine needle that reciprocates between the inside and outside of the workpiece, and when moving to one side, the sewing thread passes through the loop and returns to the outside of the workpiece. When moving to the opposite side, the loop is removed and the sewing machine needle is passed to both the front and back sides of the body fabric.In the hand sewing machine, the sewing thread is passed to each side of the body fabric. means for moving the internal sewing machine in a predetermined direction relative to the bag-shaped object to be sewn; and means for moving the fixing device relative to the hand-sewn sewing machine. When the loop formed by the sewing thread of the internal sewing machine and the needle of the hand sewing machine are moved to the opposite side of the body fabric, the loop of the sewing thread of the internal sewing machine becomes entwined to form a stitch, and then fixed when sewing a straight line. The device is moved relative to the hand sewing machine, and when sewing a curved line, the bag-like workpiece is moved and the internal sewing machine needle is moved to form the next stitch. A sewing device for a sewing machine that is characterized by sewing on fabric. 3) A claim characterized in that the internal sewing machine is provided with a means for changing the direction of the sewing machine needle by a predetermined angle, and when sewing a corner of a bag-shaped object to be sewn, the direction of the sewing machine needle is changed according to the shape of the bag-like object to be sewn. A sewing device for a sewing machine according to item 2.