JPH07303777A - Upper fork part sewing device for panty stocking - Google Patents

Abstract

PURPOSE:To provide an upper fork part sewing device capable of automatically performing flat sewing applied to overlock sewing by which the upper fork part of a panty stocking can be sewn. CONSTITUTION:Parallel endless belts 12 are arranged in front of a flat sewing machine 1, and the panty part of the panty stocking is inserted from a tip side to both belts 12, and the panty part is held between a presser belt 17 and the upper running parts of both belts 12, and the rear terminal of the panty part is held between a clamper 18 and the belt 12 by a lower guide plate 16 and the attractive force of a magnet 26 provided on a drum 13. The overlock sewing part of the upper fork part is sent in the sewing part 7 of the flat sewing machine 1 by the running of both belts 12 by starting up a motor 14, then, the flat sewing is automatically applied to the overlock sewing part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crotch part sewing device for finishing the overlocked part of the crotch part with a flat stitch in a pantyhose sewing process.

[0002]

2. Description of the Related Art A panty hose is manufactured by sewing a pair of tubular stocking materials at the crotch cutting edges with an overlock sewing machine and by sewing the toes of the tubular stocking material. In order to improve the strength of the sewn portion, it is becoming more common to sew with a thread having a large denier of about 80 to 120.

By the way, when the crotch part of the panty part is sewn by overlock stitching, the sewn part rises to form a ridge, and especially when a large-diameter thread is used, the amount of swelling increases, which makes it comfortable to wear. become worse.

Therefore, after the crotch portion is sewn with overlock stitches, a flat stitch sewing machine is used to perform flat stitches on the overlock stitches to make the overlock stitches flat, thereby improving the comfort of wearing and sewing. The strength of the part is improved. Conventionally, a flat stitch sewing machine is used to perform a flat stitch on the crotch portion, and an operator manually performs the flat stitch.

[0005]

However, in the sewing work by manual work, since it is necessary to sew the panty portion while pushing and holding the panty portion by hand, a technique is required for the work, and the finish of the sewing is uniform. Is difficult to obtain, and it takes time to perform the work, which leads to an increase in cost.

In view of the above, according to the present invention, flat stitching to be performed on the overlock stitches of the crotch portion can be automatically performed only by inserting and supplying the panty portion, a uniform sewing finish can be obtained, and the working efficiency is improved. An object of the present invention is to provide a crotch sewing device for panty hose.

[0007]

In order to solve the above problems, the first invention is a pair of parallel endless belts for inserting the panty portion of the panty hose in which the crotch part is sewn with an overlock sewing machine into the tip side. At the front position of the flat stitch sewing machine such that the upper running portions of both endless belts are at substantially the same height as the sewn portion of the flat stitch sewing machine. On the upper surface of the guide plate provided between the upper running portions of the belt, a slit is formed to guide the overlock sewing portion of the panty hose toward the sewing portion of the flat stitch sewing machine, and the belt winding portion is formed on both sides of the drum. A magnet is provided along the belt running direction on the guide plate provided on the outer circumference and the lower running part of both endless belts, A gripping tool that sandwiches the panty portion with the endless belt by the attraction force of the magnet with the endless belt and is movable integrally with the belt is provided below the lower running portion of the belt. It has a structure in which a holding belt is arranged.

According to a second aspect of the present invention, a pair of opposing mounting plates for inserting a panty portion of panty hose in which the crotch portion is sewn with an overlock sewing machine is provided with a notch at one edge on one side and an arc edge on the other side. The mounting plate is provided and supported so that the mounting plate can be freely rotated while rotating downward from the horizontal posture toward the flat sewing machine to the horizontal posture toward the front, and the mounting plate is flat. With respect to the sewing machine, the sewing machine is arranged so as to be movable between the front position of the sewing machine and the rear positions of both sides of the sewing portion, and the overlock sewing portion of the panty hose is located at the front position sandwiching the sewing of the flat sewing machine. The guide groove for guiding the tongue toward the sewn portion and the pressing roller for feeding the panty portion to the rear are provided at the rear position.

[0009]

[Action]

1st invention When the pantyhose of the pantyhose in which the crotch part is sewn to the overlock stitch is pushed wide and inserted into the tip end side of the endless belt, the overlocked part of the crotch part is provided on the drum and the upper guide plate. The gripping tool, which is housed in the slit and is located below the lower running part of the endless belt in this state, is placed on the lower edge of the panty section, and the panty section is formed by the magnet provided on the lower guide plate. Hold the ends of the.

When the endless belt is rotated in this state, the upper running portion of the endless belt is sent to the flat stitch sewing machine while the panty portion is pressed and held by the presser belt, and the overlock stitch portion guided by the slit is removed. The flat stitch is entered into the sewing portion of the sewing machine, and the flat stitch is applied from above.

In this way, the entire length of the overlock sewn portion passes through the sewing portion of the sewing machine, so that the overlock sewn portion is sewn flat by the flat stitch,
Remove the pantyhose from the flat stitch machine.

Second invention A pair of mounting plates facing each other stand by at a front position of the flat stitch sewing machine in a posture in which an arcuate edge is directed forward, and the panty sewn on the mounting plate by overlock sewing. The panty portion of the stocking is pushed in and inserted from the side of the arcuate edge, the lower portion of the opening edge of the panty portion is locked in the notch, and the overlock sewing portion is held in a semi-elliptical shape.

In this state, the mounting plate moves toward the flat stitch sewing machine, and one straight line portion of the overlock stitched portion enters the sewing portion while being guided by the guide groove, and the flat stitch is applied from above. .

When the point at which one straight line portion of the overlock sewn portion transitions to the arcuate portion reaches the sewn portion, the mounting plate stops moving and pivots downward with the center of the arcuate edge as the fulcrum. As a result, the arcuate portion of the overlock stitch portion passes through the sewn portion, and flat stitching is performed from above.

When the point at which the arcuate portion of the overlock sewn portion transitions to the other straight portion reaches the sewn portion due to the rotation of the mounting plate, the mounting plate stops rotating and resumes movement, and the other straight portion Pass through the sewn part.

When sewing the arcuate portion of the overlock stitched portion, the press roller provided on the flat stitch sewing machine pulls the flat stitched portion of the panty portion together.

By passing the entire length of the overlock sewn portion through the sewn portion in this manner, the overlock sewn portion is sewn flat by the flat stitch, and the pantyhose may be removed from the mounting plate.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the first embodiment shown in FIGS. 1 to 6, in the flat stitch sewing machine 1, a cylindrical arm 3 and a head 4 located on the arm 3 project toward the front of the main body 2 to form an arm. The upper surface of the tip portion of 3 serves as a sewing portion 7 by the needle 5 of the head 4 and the presser foot 6, and is adapted to sew a cloth that moves rearward in the longitudinal direction from the tip of the arm 3, and the front portion of the arm 3 can be sewn. A flat stitching device 11 is arranged in the.

The flat stitching device 11 has a pair of parallel endless belts 12 and 12, a drum 13 located at the front ends of the belts 12 and 12, and the both endless belts 12 and 12 are rotated via the drum 13. Motor 1
4, an upper guide plate 15 provided between the upper running portions of both belts 12, 12, a lower guide plate 16 provided on the upper surface of the lower running portions of belts 12, 12, and an upper running portion of belts 12, 12. Presser belt 1 provided directly above
7 and 17, and gripping tools 18 and 18 arranged at positions near the lower rear of the lower running portions of the belts 12 and 12.

The endless belts 12 and 12 are wound between the drum 13 located on the leading end side and the guide pulleys 19 and 20 arranged on the upper and lower sides on the trailing end side so as to rotate in a parallel state. There is.

As shown in FIG. 3, the endless belts 12 and 12 have a maximum lateral width in the parallel direction and a height dimension of vertically running portions so that the panty portion B of the panty hose A is slightly expanded. The belts 12 and 12 are set so that they can be inserted from the front end side, and the two belts 12 and 12 have a space between the opposite side edges so that the arm 3 of the flat stitch sewing machine 1 can be accommodated. And the upper surface of the upper traveling part is arm 3
Of the upper guide plate 15 is located at the upper end of the drum 13 and its rear end faces the tip of the arm 3 at the same height.

At the center of the outer peripheral surface of the drum 13 and at the center of the upper surface of the upper guide plate 15, a slit 21 for guiding the overlock sewing portion C of the crotch portion of the panty hose A to the sewing portion 7 of the flat stitch sewing machine 1. , 2
2 is provided, and the sewing portion 7 is provided on the rear extension line of the slit 22.
Is located.

The motor 14 is the endless belt 1
The drive belt 25 is wound between the recessed groove 23 provided on the outer periphery of the drum 13 and the pulley 24 which is interlocked with the motor 14 and is located behind the rear end portions of the drums 2 and 12, and both endless belts are passed through the drum 13. 12 and 12 are driven so that the upper traveling portion travels toward the flat stitch sewing machine 1.

A large number of magnets 26 are formed on the entire outer peripheral surfaces of both sides of the drum 13 and on both sides of the lower guide plate 16 so as to overlap the upper surfaces of the belts 12, 12.
It is provided so as to be lined up in a row at a predetermined interval in the twelve running directions.

The grippers 18, 18 are both belts 12, 1.
A case 27 disposed at a position closer to the rear end in the lower part of the lower traveling portion of 2; a flexible strip 28 that can be pulled out forward into the case 27 and can be pulled back by a spring or the like;
It is formed of a magnetic grip plate 29 which is attached to the tip of the flexible strip 28 and can be attracted to the outer surfaces of the belts 12, 12 by the attraction force of the magnet 26.

As shown in FIG. 3, the holding plate 29 is inserted into the endless belts 12 and 12 with the panty portion B of the panty hose A, and then pulled out from the case 27 so as to be superposed on the lower end portion of the panty portion B, so that the magnets are inserted. The end portions of the panty portion B are sandwiched between the belts 12 and 12 by being held by the suction force of the belt 26, and the endless belts 12 and 12 are moved to move integrally while pulling out the flexible strips 28 to a position directly above the drum 13. When it reaches the position, it stops due to the length of the flexible strip 28, and the rear end of the panty portion B in the moving direction is clamped to this position.

That is, as shown in FIG. 4, when the panty portion B inserted into the front ends of the endless belts 12 and 12 is fed toward the flat sewing machine 1 by the running of the belts 12 and 12, the lower end of the panty portion B is moved. Edge is belt 1
After moving to the tip end side of 2, 12, as it moves upward along the outer periphery of the drum 13, the opening portion of the panty portion B becomes an expanded shape, and the rear end portion is pulled forward and comes off. It is prevented by being held by the grip plate 29.

The presser belts 17, 17 arranged immediately above the upper running portions of the endless belts 12, 12 are provided between the front pulley 30 located above the drum 13 and the rear pulley 31 approaching the flat stitch sewing machine 1. Wound around,
The front end side is vertically movable about the axis of the rear pulley 31, and the panty portion B of the panty hose A is clamped between the belt 12 and the upper running portion of the belt 12 in the lowered position and fed toward the flat stitch sewing machine 1. Has become.

The flat stitching device according to the first embodiment of the present invention has the above-mentioned structure. Next, the operation of flat stitching will be described.

As shown in FIG. 3, the panty portion B of the panty hose A, whose crotch part is sewn with an overlock sewing machine, is pushed a little to widen the endless belt 1.
Insert the end portions 2 and 12 from the tip end side to the intermediate portion, and bring the bottom portion of the panty portion B into contact with the outer peripheral surface of the drum 13.

The portion from the bottom to the upper portion of the overlock sewing portion C applied to the crotch portion of the panty portion B is fitted into the slits 21 and 22 provided in the drum 13 and the upper guide plate 15, and the presser belts 17 and 17 are lowered. By setting it to the position, the upper portion of the panty portion B is sandwiched between the belts 12 and 12.

Further, the grip plates 29 of the both-side grips 18, 18
Is pulled forward from the case 27, the grip plate 29 is placed on the lower edge of the panty portion B, and attached by the attraction force of the magnet 26 embedded in the lower guide plate 16.
The lower end edge of the panty portion B is sandwiched between the belts 12 and 12.

When the motor 14 is started in this state and the endless belts 12 and 12 are made to travel so that the upper running portions face the flat stitch sewing machine 1, the panty portion B has flat upper stitch edges as shown in FIG. Sewing machine 1 arm 3
, The lower edge moves toward the front end side of the belts 12, 12 and then moves upward along the outer periphery of the drum 13, while the opening of the panty portion B is stretched. The rear end portion of the panty portion B is sandwiched between the grip plate 29 attracted by the magnet 26 and the belts 12 and 12, and is not separated toward the front.

As shown in FIG. 5, the panty portion B moving toward the flat stitch sewing machine 1 advances while the overlock stitch portion C is guided by the slit 22, and from the tip side to the sewing portion 7 of the flat stitch sewing machine 1. Enter and pass, and perform flat stitching on the overlock stitch C.

When the grip plate 29 reaches directly above the drum 13, the attraction by the magnet 26 of the drum 13 is released, the flexible strip 28 is wound into the case 27, and the grip plate 29 is removed from the case 2.
As shown in FIG. 6, the entire length of the crotch portion of the panty portion B passes through the sewn portion 7 so that flat sewing is performed on the overlock sewing portion C and the above total length is sewn. After passing through the attachment part 7, the panty hose A may be removed from the arm 3 by a means such as manual work or suction.
The presser belts 17, 17 have their leading ends raised to prepare for the next supply of panty hose.

As described above, the panty portion B has the slit 2
Since the overlock sewn portion C is guided by 2 and fed into the sewing portion 7 of the flat stitch sewing machine 1, it is possible to perform uniform flat stitching over the entire length of the overlock sewn portion C. The overlock sewn portion C becomes flat, so that the sewing strength of the crotch part is improved and the wearing comfort is improved.

Next, a second embodiment shown in FIGS. 7 to 13 will be described.

As shown in FIGS. 7 to 8 (A) and 8 (B), the flat stitch sewing machine 1 installed on the table 41 has a cylindrical arm 3 facing the front of the main body 2 and the arm 3. The head 4 located is projected, and the upper surface of the tip of the arm 3 is
The needle 5 of the head 4 and the presser foot 6 serve as a sewn portion 7, and the cloth that moves rearward in the longitudinal direction from the tip of the arm 3 is sewn in a flat stitch, and the sewn portion 7 is provided on the upper surface of the arm 3. A guide groove 42 that guides the overlock stitching portion C of the panty hose toward the sewn portion 7 is provided at the front position sandwiching the pantyhose, and the press roller 43 that pushes the panty portion after flat stitching backward and pushes the panty portion to the rear position. Are arranged.

Although not shown in detail in the drawings, the pressing roller 43 uses a cylinder or a motor to move up and down and rotate with respect to the arm 3 to squeeze the panty portion backward.

The flat stitching device 51 arranged on the table 41 below the flat stitch sewing machine 1 has a pair of opposing mounting plates 52, 53 into which the panty portion of panty hose is inserted, and the mounting plates 52, 53 are flattened. The sewing machine 1 includes a feed mechanism 54 that moves the sewing machine 1 from the front position to the rear position, and a drive mechanism 55 that rotates the mounting plates 52 and 53.

The mounting plates 52, 53 are formed by a semi-elliptical plate having a semicircular arc edge 56 on one end side, and a notch for locking the opening edge of the panty portion on one side edge on the other end side. 57 is provided.

The two mounting plates 52, 53 are fixed by connecting the central positions of the arc edges 56, 56 with a shaft 58 in a state of being opposed to each other on both sides so that the space between the facing surfaces of the two mounting plates 52, 53 is fixed. The width is set so as to be fitted onto the arm 3 of the flat stitch sewing machine 1.

The drive mechanism 55 for rotating the mounting plates 52, 53 rotatably supports the shaft 58 with a horizontal boss portion 60 provided at the tip of the L-shaped bracket 59, and mounts the motor on the L-shaped bracket 59. An endless belt 64 is wound between a sprocket 62 of 61 and a sprocket 63 fixed to the shaft 58, and the mounting plates 52 and 53 are reciprocally rotated about the shaft 58 by the forward and reverse rotations of the motor 61. ing.

The feed mechanism 54 for moving the mounting plates 52, 53 is provided on the table 41 with a guide rail 65 parallel to the arm 3 of the flat stitch sewing machine 1 and both ends supported by bearings 66, 67. A screw shaft 68 parallel to the screw shaft 68 is provided, and a motor 69 installed on the table 41 and a rear end of the screw shaft 68 are interlocked with each other by a pair of gears 70, and the screw shaft 68 is normally and reversely rotated by the motor 69.

L for supporting the mounting plates 52, 53
The lower end of the mold bracket 59 is slidably supported on the guide rail 65, and the mold bracket 59 moves along the guide rail 65 and the L-shaped bracket 59 is internally threaded to the screw shaft 68. The boss 71 having is fixed.

Therefore, the mounting plates 52 and 53 linearly reciprocate back and forth on the table 41 by the feed action of the screw shaft 68 and the female screw by the forward and reverse rotation of the motor 69.

As shown in FIG. 7, the two mounting plates 52 and 53 are arranged so as to stand by in front of the arm 3 of the flat stitch sewing machine 1 and move on both sides with the arm 3 sandwiched during the backward movement. Arc edge 5 when in standby position
The notch 57 is positioned in the lower rear part in a horizontal state in which 6 is positioned in the front.

The flat stitching device of the second embodiment of the present invention has the above-mentioned structure. Next, the action of flat stitching will be described with reference to the process diagrams of FIGS. 9 to 13.

As shown in FIG. 7, with the mounting plates 52 and 53 stopped at the front standby position as shown in FIG.
Push the panty part B of the panty hose A whose upper part is sewn with an overlock sewing machine to slightly spread it,
The mounting plates 52 and 53 are inserted into the arcuate edge 56 from the tip to the position on the rear end side, and the lower part of the opening edge of the panty portion B is locked in the notch 57.

The panty portions B inserted into both mounting plates 52 and 53 are held in a state of being opened to both sides so as to follow the shapes of both mounting plates 52 and 53, and the overlock sewing portion C is held in both mounting plates 52 and 53. It is located in the center between and has a semi-elliptical arrangement that is equal to the outer shape of the mounting plates 52 and 53.

When the panty portion B is inserted into the mounting plates 52 and 53 and set, the motor 69 is activated and the screw shaft 6
8 rotates, the mounting plates 52 and 53 retreat in the horizontal posture, and as shown in FIG. 10, the panty portion B has an upper portion between the mounting plates 52 and 53 in which the arm 3 of the flat stitch sewing machine 1 is located. It moves upward, enters and passes through the sewing portion 7 of the sewing machine 1, and the flat stitch D is applied on the overlock stitch portion C.

When the panty portion B enters the arm 3, the guide groove 42 provided at the tip of the arm 3 guides the overlock sewing portion C, and the overlock sewing portion C accurately enters the sewing portion 7. It will be.

Overlock sewing portion C of panty portion B
Are held in a semi-elliptical shape along the outer shapes of the mounting plates 52 and 53, and therefore, the points at which the upper straight portion of the overlock sewing portion C transitions to the curved portion and the points at which the curved portion transitions to the lower linear portion. Are located above and below the axis of the shaft 58.

As shown in FIG. 10, the mounting plate 52.53
When the transition point from the upper straight portion to the curved portion reaches the sewn portion 7, the electric current to the motor 69 is cut off and the mounting plate is removed. 52 and 53 stop at that position.

When the backward movement of the mounting plates 52 and 53 is stopped, the motor 61 is activated, and the mounting plates 52 and 53 and the panty portion B rotate downward about the shaft 58 as shown in FIG. As described above, the mounting plates 52, 53 are rotated by 180 ° so that the rear ends of the mounting plates 52, 53 are in a horizontal posture facing forward.

By the rotation of 180 °, the curved portion of the overlock stitched portion C passes through the sewn portion 7,
The flat stitch D is continuously applied from the upper straight portion to the curved portion.

As shown in FIG. 11, the mounting plates 52, 53
At the time of rotation, the presser roller 43 waiting in the raised position on the arm 3 descends to press the panty portion B onto the arm 3 and rotate, and the portion of the panty portion B on which the flat sewing D has been completed is moved backward. Send it to the machine so that the flat stitches on the curved part can be performed without any problems.

Further, the rotation of the mounting plates 52 and 53 causes the opening edge of the panty portion B to widen.
As described above, by engaging a part of the opening edge with the notch 57 provided in the mounting plates 52, 53, it is possible to reliably prevent the opening edge from splashing.

As shown in FIG. 12, the mounting plates 52, 53
Is rotated 180 °, and when the transition point from the curved portion to the straight portion reaches the sewn portion 7, the motor 69 is restarted and the mounting plates 52 and 53 restart the backward movement, and as shown in FIG. Perform flat stitch D on the remaining straight part.

As described above, when the flat stitch D is applied to the entire length of the overlock stitch portion C, the mounting plates 52 and 53 are stopped at the retracted position due to the interruption of the power supply to the motor 69, and the panty hose is lifted after the presser roller 43 is raised. A
Are removed from the mounting plates 52, 53 by means such as manual work or suction.

When the pantyhose A is removed, the motor 69 reversely rotates, the mounting plates 52 and 53 move forward and return to the standby position, and the motor 61 reverses at this standby position, and the mounting plates 52 and 53 have the shaft 58. 180 degrees downwardly in the reverse direction, and the arc edge 56 returns to the horizontal position in which the arc edge 56 faces forward, and prepares for the next supply of panty hose.

As described above, also in the second embodiment, the flat stitch D can be continuously applied to the entire length of the overlock stitch portion C, and the sewing strength of the crotch portion and the wearing comfort can be improved. .

[0064]

As described above, according to the present invention, the flat sewing which is performed on the overlock sewing portion where the crotch portion of the panty hose is sewn is set by inserting the panty portion into the endless belt and setting the gripping tool. Alternatively, or simply by inserting the panty portions into the pair of mounting plates, the flat sewing of the crotch portion can be performed efficiently and labor-saving, and the sewing cost can be reduced.
Further, since the overlock stitched portion of the panty portion is fed to the sewing portion while being guided by the slit or the guide groove, uniform flat stitching can be performed on the overlock stitched portion, and the commercial value can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a flat stitching device according to the present invention.

FIG. 2 is a vertical sectional view of a drum portion of the above.

FIG. 3 is a perspective view showing a set state in which panty hose is inserted into the flat stitching device.

FIG. 4 is a perspective view showing a state during transfer of the pantyhose of the above.

FIG. 5 is a perspective view showing a state of flat stitching.

FIG. 6 is a perspective view showing a state where flat sewing is completed.

FIG. 7 is a perspective view showing a second embodiment of the flat stitching device according to the present invention.

FIG. 8A is a front view showing a mounting plate portion, and B is A.
FIG. 8 is a sectional view taken along the arrow VIII-VIII in FIG.

FIG. 9 is a perspective view showing a set state in which the pantyhose is inserted into the mounting plate.

FIG. 10 is a perspective view showing an initial state of flat stitching.

FIG. 11 is a perspective view showing a state in which the mounting plate has rotated 90 ° during flat sewing.

FIG. 12 is a perspective view showing a state in which the mounting plate has rotated 180 ° during flat sewing.

FIG. 13 is a perspective view showing a state where flat sewing is completed.

[Explanation of symbols]

 1 Flat Stitch Sewing Machine 3 Arm 7 Sewing Part 11 Flat Stitching Device 12 Endless Belt 13 Drum 14 Motor 15 Upper Guide Plate 16 Lower Guide Plate 17 Presser Belt 18 Gripping Tool 21, 22 Slit 26 Magnet 27 Case 28 Flexible Stroke 29 Gripping Plate 41 table 42 guide groove 43 presser roller 51 flat stitching device 52, 53 mounting plate 54 feed mechanism 55 drive mechanism 56 arc edge 57 notch 58 shaft 59 L-shaped bracket 61, 69 motor 65 guide rail 68 screw shaft 71 boss

Claims (2)

[Claims] 1. A pair of parallel endless belts for inserting the panty portion of a pantyhose whose crotch part is sewn with an overlock sewing machine to the front end side. The panty hose overlock is placed on the outer peripheral surface of the drum located on the tip side of both endless belts and on the upper surface of the guide plate between the upper running parts of both belts. A slit is formed to guide the sewn portion toward the sewn portion of the flat stitch sewing machine, and a magnet is attached to the guide plate provided on the outer circumference of the belt winding portion and the lower running portions of both endless belts on both sides of the drum. It is installed along the running direction, and is panned by the attractive force of the magnets below the lower running parts of both endless belts. A crotch sewing device for panty hose in which a tee portion is sandwiched between endless belts, a gripping tool that is movable together with the endless belts is provided, and a holding belt is arranged immediately above the upper running portions of both endless belts. 2. A pair of opposing mounting plates into which a panty portion of panty hose sewn at the crotch portion with an overlock sewing machine is inserted, the one end side having an arcuate edge and the other end side having a notch formed at one side edge, The mounting plate is supported so that it can be freely rotated from the rearward horizontal posture facing the flat stitch sewing machine to the forward horizontal posture, and the mounting plate is supported with respect to the flat stitch sewing machine. Arranging the sewing machine so that it can move between the front position of the sewing machine and the rear positions of both sides of the sewing portion, and the overlock sewing portion of the panty hose is sewn to the front position sandwiching the sewing portion of the flat stitch sewing machine. A crotch sewing device for panty hose having a guide groove for guiding the panty and a pressing roller for feeding the panty part backward at the rear position.