JPH08309056A - Method and device for automatically positioning panty hose cloth in upper crotch sewing machine - Google Patents

Abstract

PURPOSE: To accurately position the welt part and garter line of panty hose cloth temporarily fitted to a pair of upper and lower clamping boards. CONSTITUTION: The cloth is temporarily fitted to the pair of the upper and lower clamping boards 6 and 7, the welt part is clamped and pulled in by a welt holder 26, an upper crotch part is sent in by a garter line holder 28, the garter line is detected by a detection sensor 27 and thus, the welt part and the garter line are positioned. Then, at the time of clamping the cloth by the approach of the pair of the clamping boards 6 and 7, by making the welt holder 26 and the garter line holder 28 follow the pair of the clamping boards 6 and 7, the generation of position deviation after positioning is prevented.

Description

Detailed Description of the Invention [Industrial applications]

[0001] The present invention relates to a method and apparatus for automatically positioning panty hose material in a dress sewing machine, and more specifically, it is temporarily attached to a pair of upper and lower bite plates of bite members which is the first preparatory work in the rise sewing process. The present invention relates to an automatic positioning method and device for accurately positioning a welt part and a garter line of panty hose stock.

[Prior art]

Sewing of panty hose is shown in FIG.
Using the tubular knit panty hose fabric S shown in (A) and (B), the pair of fabrics S ₁ and S ₂ are laid on top of each other with the crotch portion 1 serving as the panty portion, and a cut portion is formed in the overlapped portion. The pantyhose 3 shown in FIG. 10 (B) is obtained by sewing the cut portion provided and separated by the seam 2.

As described above, in order to sew the panty hose using the pair of panty hose fabrics S ₁ and S ₂ (hereinafter referred to as fabric), for example, the automatic pantyhose rise sewing machine disclosed in Japanese Patent No. 880791 is widely used. It is put to practical use.

FIG. 9 shows an outline of the above panty hose automatic crotch sewing machine, in which a plurality of bite members 5 are rotatably provided at regular intervals on a horizontal carrier 4.

The bite member 5 includes a pair of left and right bite plates 6,
6 and 7, 7 are composed of left and right arms 8 and 8 mounted so as to face each other, and the pair of left and right bite plates are parallel to each other by the opening and closing operation of the arms 8 and 8 in the rotation direction of the carrier 4. It is configured to be reciprocally rotatable so as to widen along, and the pair of upper and lower bite plates are arranged to come into pressure contact with and separate from each other.

The bite member 5 is rotated clockwise in FIG. 9 by the rotation of the carrier 4, and is sequentially positioned at the work stations I to VI installed on the rotation track.

The first work station I is a cloth mounting position on the bite member 5, and the cloth is temporarily mounted on the upper bite plates 6 and 6 and the lower bite plates 7 and 7, respectively.

The cloth may be attached manually by an operator, but it is disclosed in JP-A-1-259892 and JP-A-2.
Alternatively, the automatic mounting device proposed in No. 277489 may be used and automatically performed.

While the bite member 5 having the cloths S ₁ and S ₂ attached thereto moves from the second work station II to the third work station III, the positioning device 9 moves the upper and lower bite plates 6, 6 and 7 together. , 7 pulling back the cloth S temporarily attached to each of them, and positioning the welt portion 11 and the garter line 13 of the cloths S ₁ , S ₂ at predetermined positions,
At III, the inner crotch portion of the crotch portion 1 that becomes the panty portion is cut by the cutting member 10, and at the fourth work station IV, the pair of left and right bite plates are expanded on the circumferential orbit line to form the dough S _{1 in the} overlapping bite state. , S ₂ to expose the cutting edge of the inner crotch part to the outside.

Next, when the bite member 5 moves to the work station V, the inner crotch portion cutting edges of the exposed cloths S ₁ and S ₂ are sewn by the sewing machine 12.

Further, the bite member 5 is the sixth work station.
When moving to VI, the pair of left and right bite plates of the bite member 5 returns from the expanded state to the original parallel state, and moves to the first work station I again.

By the way, when the pantyhose is sewn by using the pair of cloths S ₁ and S ₂ , the welt portion 11 and the garter line 13 of both cloths S ₁ and S ₂ must be aligned so that they are aligned with each other. As shown in (B) and (C), a defective product in which a step is formed in the sewn portion of the crotch part 1 is generated.

Therefore, in order to position the upper and lower cloths S ₁ and S ₂ temporarily attached to the bite member 5 at the first work station I, the second work station II and the third work station
The positioning device 9 arranged between III includes upper and lower fabrics S ₁ ,
It is required to have a function of positioning the welt parts 1 of S ₂ and the garter lines 13 in a vertical alignment.

The conventional automatic positioning device, as proposed by the present applicant in Japanese Patent Publication No. 5-47234, comprises a positioning means for the welt portion and a garter line positioning means.
The former welt portion positioning means arranges the welt portion positioning plates on both sides of the pair of upper and lower bite plates,
The welt detection sensor is arranged to move back and forth between the pair of bite plates, and the crotch part of the cloth temporarily attached to the pair of bite plates is clamped by the positioning plate and pulled in the direction of the bite of the bite plate. When the welt portion is detected at, the pulling is stopped to position the welt portion.

In the latter garter line positioning means, the garter line positioning plates are arranged on both sides of the pair of upper and lower bite plates, and as shown in FIG. 11 (A),
The garter line detection sensor 14 is arranged so as to be movable back and forth with respect to the center of the tip between the upper and lower bite members, the crotch is clamped by the plate and pulled in the direction of the bite plate, and the sensor 14
When the garter line is detected at, the drawing operation is stopped to position the garter line 13.

[0016]

By the way, in the positioning means described above, in both the positioning plate of the welt portion and the garter line positioning plate, the pair of upper and lower biting plates approach each other before the step of pressing the upper and lower cloths is started. , It is designed to be released from the pair of bite plates to release the clamp on the crotch, so that the welt part and garter line can be positioned and held free when the pair of upper and lower bite plates approach each other, and There is a problem that displacement occurs.

Further, since the sensor 14 for detecting the garter line 13 detects the garter line 13 of the upper and lower cloths at one position in the center between the tips of the bite plate pair, as shown in FIG. 11 (A). Even if the garter lines 13 of the upper and lower fabrics are aligned at the center, the two may be displaced in an X shape. In such a state, as shown in FIG. When the inner crotch portion is widened and sewn, the garter line 13 is displaced, and there is a problem that a defective product having a step of the garter line 13 is generated as shown in FIG. 11C.

Therefore, an object of the present invention is to allow a pair of cloths temporarily mounted on the pair of upper and lower biting plates to be mounted in a perfect state, and to position the welt portion and the garter line of the mounted cloth. Automatic positioning method and device for panty hose fabrics that can align the welt part and the garter line in the upper and lower direction without any position deviation and can sew products with no step at the stitching part of the crotch part To provide.

[0019]

In order to solve the above-mentioned problems, the invention of a method is to provide a biting member having a pair of left and right bite plates facing each other vertically along a circumferential orbit. In the rise sewing machine that is arranged to move and sew the crotch part of the panty hose cloth that is attached to each of the upper and lower bite plate pairs, in the riser part of the panty hose cloth that is temporarily attached to the bite plate pair, It is detected by a sensor and clamped by the welt grip, and the welt part is pulled in to a predetermined position along the length direction of the bite plate pair. The crotch part is clamped by the line grip, and it is drawn along the length direction of the bite plate pair, and consists of a garter line drawing step of positioning the garter line with sensors arranged on both sides of the bite plate pair, Until the lower biting plate pair approaches and bites the crotch, the welt grip holds the positioning state with the welt part clamped, and the garter line grip keeps the garter line positioning state with the crotch clamped. This is the configuration adopted.

Similarly, in the invention of the apparatus, a pair of left and right bite plate pairs are vertically opposed to each other, and a bite member is arranged so as to move along a circumferential orbit, and each of the upper and lower bite plate pairs is arranged. In a crotch sewing machine configured to sew the crotch part of the attached pantyhose fabric, the claw plates are movably arranged in the length direction and the vertical direction with respect to the pair of claw plates,
When the sensor detects the welt part of the crotch part attached to the bite plate pair, the whole welt part is sandwiched, and the welt part that holds the welt part to the predetermined position along the length direction of the bite plate for positioning and holding, A garter line detection sensor that is arranged so that it can move toward and away from both sides of the tip of the upper and lower biting plates, and the distance from the upper and lower biting plates to both sides and along the length direction of the biting plate It is possible to freely move and follow the approaching movement of the pair of upper and lower bite plates, clamp the crotch part with the bite plate, pull the crotch part in the length direction of the bite plate, and detect the garter line with the garter line detection sensor. It consists of a gutter line grip for positioning at the detected position, and until the upper and lower bite plate pairs approach and bite the crotch, the welt grip holds the positioning state with the welt part sandwiched, and the garter line grips. One Only it is obtained by adopting the configuration which is adapted to retain the positioning of the garter line.

[0021]

[Function] With the crotch portion of the fabric temporarily attached to each of the pair of upper and lower bite plates, first, the welt gripper advances between the bite plates, and the welt portions of the upper and lower fabrics are slightly pushed back and clamped, and then the predetermined stroke is performed. When the sensor detects the welt part, it stops and then clamps the welt part again, and then moves backward to move the welt part to the predetermined position of the bite plate pair. Pull up to and hold the welt part.

Next, the garter line detection sensor approaches the tip of the pair of bite plates, and the garter line gripper clamps the crotch on both sides of the tip of the pair of bite plates so that the crotch becomes the bite plate. After pulling along the garter line so that the garter line passes through the detection sensor, the crotch is pushed back by an amount detected by the garter line. As a result, the garter line is positioned and held on the line connecting the detection sensors.

As described above, while the welt portion and the garter line are positioned and held, the pair of upper and lower biting plates move closer to each other to sandwich the facing surfaces of the upper and lower crotch parts. Is cooperating with the movement of the bite plate pair while maintaining the positioning and holding state, and the positioning hold is released after the upper and lower bite plate pairs are clamped at the crotch. There is no deviation in positioning.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.

As already described with reference to FIG. 9, the cloths S ₁ and S ₂ are temporarily attached to the pair of upper and lower bite plates of the bite member 5 at the first work station I and the third work station III.
In order to start the cutting work of the crotch portion, it is necessary for the bite member 5 to perform the dough positioning work between the second work station II and the third work station III.

Therefore, as shown in FIG. 9, the positioning device 9 of the present invention is set at a position facing the second work station II, and the bite member 5 is operated intermittently or continuously, so that the positioning device 9 is operated. Needs to move in the same direction as the bite member 5 at a constant speed and move toward the third work station III by a predetermined distance.

1 and 2 show a bite member 5 and a positioning device 9
And the relationship between the two, the bite member 5 is mounted on the carrier 4 having the circumferential orbit shape shown in FIG. 9, and as described above, a pair of left and right arms are provided on the left and right arms. The structure is provided with a pair of upper and lower bite plates 6, 6 and 7, 7, and the opening / closing operation and rotation of the bite member 5 and the follow-up rotation and fast-forward of the bite member 5 by the positioning device 9 are performed. The structure for returning is the same as Japanese Patent Publication No. 5-47234,
Illustration and description are omitted here.

In FIGS. 1 and 2, the positioning device 9 is
A unit base 21 that rotates integrally with the bite member 5 is arranged close to the rear end side of the bite member 5, and the main component parts of the positioning device 9 are attached to the unit base 21.

In the unit base 21, a pair of vertical walls 23 and 24 are installed on the upper surface of the bottom plate 22 so as to face each other inside and outside in the rotational direction, and a rectangular box 25 is installed on the upper ends of both vertical walls 23 and 24. Fixed, unit base 21
A welt grip 26 is installed inside the box so as to move back and forth with respect to the bite member 5, and a garter line detection sensor 27 and a garter line grip 28 are attached to the box 25.

The welt grip 26 has a vertical wall 23,
A rail 29 in the front-rear direction is horizontally provided in the lower part between 24, and an L-shaped bracket 31 is fixed to an upper end side of a long movable member 30 installed on the rail 29.
The rectangular case 32 is attached to the front surface of the vertical part of the rectangular case so as to be movable up and down, and the arm 33 fixed so as to project rearward from the upper surface of the rectangular case 32 is connected to the cylinder 34 fixed to the rear surface of the L-shaped bracket 31. The rectangular case 32 is moved up and down by expansion and contraction.

An endless belt 37 is provided between pulleys 35 and 36 attached at the front and rear positions on the lower surface of the box 25.
The rear pulley 36 is driven by a reversible motor 38 installed on the box 25, and the rear end of the arm 33 is allowed to move up and down through the belt 37 and a pin 39. The square case 32 is connected and is moved back and forth along the rail 29 by the forward and reverse rotation of the motor 38.

In the rectangular case 32, as shown in FIG.
As shown in (B), the guide shaft 40 perpendicular to the front and rear positions
And 41 are fixed in parallel, and five grippers 42, 43, which are strip-shaped and sequentially face each other on both guide shafts 40, 41, vertically,
44, 45, and 46 are mounted so as to protrude forward from the bite member 5 side through a vertically long window hole 47 provided in the front surface of the rectangular case 32, and air of both shafts is attached to the rear portion of the case 32. The cylinder 48 is fixed.

The gripping tool 44 located in the center is located in the upper and lower central parts of the rectangular case 32, and is fixed to the guide shafts 40 and 41 in an externally fitted manner. The welt grip 26 is shown in FIG.
When moved to the forward position indicated by the chain double-dashed line, the gripping tool 44 has the cloth S ₁ temporarily attached to the upper bite plates 6 and 6,
The lower bite plates 7, 7 enter between the facing surfaces of the cloth S ₂ temporarily attached.

A sensor 49 for detecting the welt portion 11 of the upper cloth S _{1 and} a welt portion 11 of the lower cloth S ₂ are detected above and below the central gripping tool 44 at a position projecting from the front surface of the rectangular case 32 by a predetermined distance. The sensor 50 is provided in a vertically coaxial arrangement.

The first grip 42 located at the top and the fifth grip 46 located at the bottom are the slide bearing 5
1 and 51 is attached to the front guide shaft 40 so as to be vertically movable, and the rear end is connected to the rods 52 and 52 of the air cylinder 48. As shown in FIG. When the air cylinder 48 is extended, it is in an open / closed state positioned above and below the window hole 47.
As shown in (B), the second grips 4 approach each other toward the center.
The third and fourth grippers 45 are pressed and moved to the center, so that the five grippers 42, 43, 44, 45, and 46 are overlapped.

The second grip 43 and the fourth grip 45
Is attached to the inner guide shaft 41 via the slide bearings 53, 53 so as to be vertically movable, and the springs 54, 54 fitted onto the slide shaft 41 are used to mount both grips 4
The stoppers 55 and 55 fixed to the front guide shaft 40 are urged by the elastic forces of 3 and 45 toward the vertical separation.
By abutting against the first grip 42 and the center grip 44, and between the center grip 44 and the fifth grip 4
The separated position is set so as to be located approximately in the middle of 6.

Each of the first grip 42, the second grip 43, the fourth grip 45, and the fifth grip 46 is shown in FIG.
Welt grip 2 in the separated position shown in (A).
When 6 moves to the forward position shown by the chain double-dashed line in FIG. 1, the first gripping tool 42 faces the cloth S ₁ temporarily mounted on the upper biting and supporting plates 6, 6, and the second gripping tool 42 faces the cloth. 43 enters into the crotch portion of this fabric. Similarly, with respect to the cloth S ₂ temporarily attached to the lower bite plates 7, 7, the fourth gripping tool 45 enters into the crotch portion of this cloth, and the fifth gripping tool 4
6 faces the lower surface side of the cloth, and when the air silling 48 contracts in this state, the first gripping tool 42, the second gripping tool 43, and the central gripping tool 44 clamp the welted portion 11 of the upper cloth S _1. Then, the central gripping tool 44, the fourth gripping tool 45, and the fifth gripping tool 46 make the welt portion 11 of the lower fabric.
Will be pinched.

The garter line detection sensor 27 and the garter line grip 28 are arranged in pairs on both sides of the box 25, as shown in FIG. 2 (A). Since the pair of sensors 27 and the garter line gripping tool 28 on both sides have the same structure, the same parts are designated by the same reference numerals.

As shown in FIGS. 1 and 2A, the box 25
Horizontal shaft 5 that penetrates in the front-back direction at both sides of the upper part of the
6, 56 are attached so as to be movable back and forth in the axial direction and can be freely rotated, downward arms 57, 57 are fixed to the tips of the horizontal shafts 56, 56, and inward bending provided at the lower ends of the arms 57, 57. Garter line detection sensor 2 on top and bottom of one piece
7, 27 are fixed.

When the arms 57 and 57 on both sides are in the separated position, as shown by a solid line in FIG. As shown in the two-dot chain line in the figure, approach both sides of the bite member 5 and hang down,
The upper and lower garter line detection sensors 27, 27 enter between the upper and lower bite plates 6 and 7.

Horizontal shafts 58, 58 penetrating in the front-rear direction are attached to both sides of the lower part of the box 25 in such a manner that they can be moved back and forth in the axial direction and can be freely rotated.
The downward arms 59, 59 are fixed to the tips of the arms 57, 57 located slightly rearward of the arms 57, 57, and the garter line grips 28, 28 are attached to the lower ends of the arms 59, 59.

The garter line grips 28, 28 are shown in FIG.
As shown in (B), the arm plate 61 is fixed to the outer surface of the L-shaped bracket 60 fixed to the tip of the arm 59, and the lower grip 62 is attached to the tip of the arm plate 61. The upper grip 65 is attached to the sliding body 64 which is held vertically movable by the rail 63 provided on the outer surface side of the upper grip 65, and the upper grip 65 is extended by the spring 66 stretched between the bracket 60 and the sliding body 64. (B) As indicated by the solid line, the elasticity that returns to the raised position separated from the lower grip 62 is urged.

The upper and lower grips 62, 65 are cylinders 67.
And a plate-shaped gripping piece 68 fixed to the tip of the piston rod
And the upper and lower grips 65, 62 are formed in the upper position, the interval between the upper and lower grips 65, 62 is set so as to correspond to the side surfaces of the bite plates 6, 7 which are separated vertically.
At the time of the approaching motion in which 9 and 59 hang downward, the upper and lower grips 65 and 62 have the gripping pieces 68 and 68, respectively.
When the upper biting plates 6 and 6 are moved downward and the material is nipped with the lower bite plates 7 and 7, the upper grip 65 is shown by a chain double-dashed line in FIG. 2B. , The upper bite plates 6 and 6 are moved downward.

The horizontal shafts 56, 56 and 58, 58 can be moved back and forth and rotationally by using an appropriate drive source such as a cylinder or a motor.

The automatic positioning device of the present invention has the above-mentioned structure. Next, the operation will be described by mainly using the operation diagrams shown in FIGS. 4 to 8.

The initial state is shown in FIG. 1, FIG. 2 (A) and FIG.
As shown by the solid line in (A), the positioning device 9 is brought close to the rear end side of the bite member 5 that stops at the second work station II.
Is positioned, the welt grip 26 waits in the retracted position approaching the rear end of the bite member 5, stops in the raised position by the extension of the cylinder 34, and grips 42, 43, 44, 4
5, 46 are separated.

The garter line detection sensor 27 and the garter line grip 28 are standing by at the forward end position of the bite member 5, which is spaced apart from each other at the front end thereof.

FIGS. 4A to 4C show a state in which the bite member 5 on which the cloths S ₁ and S ₂ are temporarily attached at the first work station I is stopped at the second work station II.
(B) shows a state in which the welt portion 11 of the cloth S ₁ temporarily attached to the upper bite plates 6 and 6 and the cloth S ₂ temporarily attached to the lower bite plates 7 and 7 is displaced forward and backward.

When the bite member 5 to which the cloths S ₁ and S ₂ are temporarily attached stops at the second work station II, first, the welt grip 26 moves forward at a high speed for a predetermined stroke and then moves forward at a low speed on the way. Then, it stops at the forward position indicated by the alternate long and short dash line in FIGS. 4 (A) and 4 (B).

When the welt grip 26 moves forward at a low speed, the first grip 42 faces the upper part of the cloth S ₁ temporarily attached to the upper bite plates 6, 6, and the second grip 43 has the same cloth as above. Entering into the crotch part of S ₁ , and the fourth grip 4
5 enters the crotch portion of the cloth S ₂ temporarily attached to the lower bite plates 7, 7, the fifth gripping tool 46 faces the lower surface side of the cloth S ₂ , and the central gripping tool 44 moves the upper and lower cloths S 2. Enter between the facing surfaces of ₁ and S ₂ .

When the welt grip 26 moves forward at a low speed, when both of the welt portion detection sensors 49 and 50 provided above and below the central grip 44 detect the welt portions 11 and 11 of the upper and lower cloths S ₁ and S ₂ , respectively. , Further, it advances by the set time of the timer and stops.

By the forward movement of the welt grip 26 as described above, the welt portions 11, 11 of the upper and lower cloths S ₁ , S ₂ are pushed back toward the front end side on the front surface of the rectangular case 32, and the welt portions 11 and 11 of FIG.
As shown in (A) and (B), the upper and lower welt portions 11,
Even if the position 11 is displaced, the upper and lower parts are aligned with each other in conformity with the front surface of the rectangular case 32.

Next, the welt grip 26 is attached to the cylinder 4
By the contraction of 8, the first grip 42, the second grip 42, the fourth grip 45, and the fifth grip 46 are moved to the central grip 44.
5A and 5B, the welt portions 11 of the upper and lower cloths S ₁ and S ₂ are sandwiched as shown in FIGS. 5A and 5B.

When the welt grip 26 is moved forward, the garter line detection sensors 2 on both sides which are separated at the forward position are opened.
7 and 27 and garter line grips 28 and 28 are shown in FIG. 4 (C).
As shown by the alternate long and short dash line in FIG.
The sensors 27, 27 enter between the upper and lower bite plates 6, 7,
The gutter line grips 28, 28 are upper and lower grips 65,
The grip plates 68, 68 of 62 face the side surfaces of the upper and lower bite plates 6, 7.

The welt grip 26 is made of upper and lower cloths S ₁ and S _2.
After sandwiching the welt parts 11 and 11, the first and second gripping tools 42 and 43 and the fourth and fifth gripping tools 45 and 46 are separated and opened as shown by the chain double-dashed line in FIG. 6 (A). Welt section 1
When the clamps 1 and 11 are released, they are moved backward at a low speed to the position shown by the solid line in FIG. 6 (A), and are moved forward again to move the sensors 49 and 50 of the central gripper 44 to the welt portion 11 as shown in FIG. 6 (B). Stop at the position where the end is detected, and as shown in FIG.
Second grips 42, 43 and fourth and fifth grips 45, 4
6 approaches the central grip 44, and the upper and lower welts 1
1 and 11 are clamped.

As a result, the welt portions 11, 11 of the upper and lower fabrics S ₁ , S ₂ are sandwiched by the welt grips 26 while being positioned vertically.

When the welt grip 26 is operated, as shown by the arrow in FIG.
Reference numerals 8 and 28 hold the upper crotch portions of the upper and lower cloths S ₁ and S ₂ between the grip plates 68 and 68 so that the upper crotch portions do not move.

Next, the welt grip 26 is shown in FIG.
As shown by the arrow on the upper and lower fabrics S ₁ and S ₂ , the welt part 1
The robot moves backward while sandwiching 1 and 11 and pulls the upper and lower crotch parts toward the back of the bite plates 6, 6 and 7, 7.

At the same time, the garter line grips 28, 2
As shown by the arrow in FIG. 7 (A), 8 performs the movements of retreating and separating, advancing and approaching with the crotch portion being clamped, and the crotch portion pulled in by the welt grip 26 to the bite plate 6,
Feed into 6 and 7,7.

7 (A) in which both ends of the garter lines 13 and 13 of the cloths S ₁ and S ₂ have passed both detection sensors 27 and 27 as the pulling up of the crotch portion by the welt grip 26 and the garter line grips 28 and 28 continues. ) And (B), the backward movement of the welt grip 26 and the garter line grips 28, 28 is stopped, and the retraction of the crotch portion is completed.

At this time, as shown in FIG. 7A, the garter lines 13 of the upper and lower cloths S ₁ and S ₂ are stopped in a state of being vertically displaced or crossed.

The garter line grips 28, 28 are shown in FIG.
As indicated by the arrow in (A), the garter lines 13 and 1
The end of 3 stops in the state detected by the sensors 27, 27. Garter line 1 is used to pull back the upper and lower fabrics S ₁ and S _2.
3 and 13 are performed individually at both ends, and the ends of the garter lines 13 and 13 are connected to the respective detection sensors 2.
Since it is stopped at the position detected by Nos. 7 and 27, as shown in FIG. 8A, the garter lines 13 of the upper and lower cloths S ₁ and S ₂ ,
13 is vertically aligned in a straight line.

When the garter line grips 28, 28 are used to pull back the crotch portion, the welt grip 26 is shown in FIG.
(A), as shown by the arrow in FIG. 8 (A), the rear part is moved backward to a fixed position to bring the crotch part into a predetermined tension state.

When the positioning of the garter lines 13, 13 is completed, the garter line detection sensors 27, 27 move away from the bite member 5 to both sides and come out from between the upper and lower bite plates 6, 7 and 6, 7. As shown in FIG. 8 (C), the upper bite plates 6 and 6 move downward, and the lower bite plates 7 and 7 sandwich the upper and lower cloths S ₁ and S ₂ between the facing surfaces.

At the time of lowering the upper bite plates 6, 6,
The upper grip 65 of the gutter line grip 28 moves following the downward movement of the upper bite plates 6 and 6, and the welt grip 26 is entirely moved downward as shown by the arrow in FIG. 8C.

In this way, when the upper bite plates 6 and 6 are lowered, the upper grip 65 of the garter line grip 28 is caused to follow the movement, so that the garter lines 13 and 13 can be maintained in the positioning state. When the welt grip 26 is moved down, the position of the welt portions 11, 11 can be maintained, and the positional displacement of the positioned welt portions 11, 11 and the garter lines 13, 13 can be prevented.

As described above, when the upper bite plates 6 and 6 and the lower bite plates 7 and 7 sandwich the upper and lower cloths S ₁ and S ₂ , the welt grip 26 causes the _first and _second grippers 42 and 43. And the fourth,
The fifth grippers 45, 46 are separated to separate the welt parts 11, 1.
The pinch of 1 is released, it returns to the retracted position, and stops at the elevated standby position. Further, the garter line knobs 28, 28 also return to the position separated from the bite member 5.

Welt parts 11, 11 of upper and lower fabrics S ₁ , S ₂
When the garter lines 13 and 13 are positioned on the bite plates 6, 6 and 7, 7 through the above-described operations,
The bite member 5 sequentially moves from the third work station III to the sixth work station VI, and the cloths S ₁ and S ₂ are sewn on the pantyhose.

[0069]

As described above, according to the present invention, it is only necessary to temporarily attach the panty hose material to the pair of upper and lower bite plates of the bite member, and then the complete attachment to the pair of bite plates and the welt of the upper and lower material pieces. Positioning work of the upper and lower lines of the end part of the part and the garter line can be automatically performed, and the work of attaching the upper and lower cloths to the pair of bite plates can be greatly saved and the efficiency can be improved.

Further, since the welt grip and the garter line grip are configured to follow the vertical movement of the bite plate pair, the movement of the bite plate pair after the positioning of the welt part and the garter line maintains the positioning state. Since there is no misalignment after positioning, it is possible to maintain accurate positioning of the welt and garter line.
In the subsequent process of sewing the crotch part by the automatic crotch machine, accurate sewing can be performed, and therefore, extremely excellent pantyhose can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view showing a main part of an automatic positioning device.

FIG. 2A is a vertical sectional front view of the same, and FIG. 2B is an enlarged vertical sectional view of the gutter line grip.

FIG. 3A is a vertical cross-sectional view showing a separated state of a welt grip, and FIG. 3B is a vertical cross-sectional view showing the same grip state.

FIG. 4A is a plan view in which a cloth is temporarily attached to the bite member,
(B) is a front view of the above, (C) is a vertical side view.

5A is a plan view before positioning and sandwiching the welt portion, FIG. 5B is a front view of the same, and FIG. 5C is a longitudinal side view of the same.

FIG. 6A is a side view showing a state in which the welt portion is unsandwiched, FIG. 6B is a plan view in which the welt portion is positioned and sandwiched, and FIG. 6C is a front view of the same.

FIG. 7A is a plan view showing a retracting step of the crotch portion, and FIG. 7B is a front view of the same.

8A is a plan view showing a positioning state of a garter line, FIG. 8B is a front view of the same, and FIG. 8C is a side view showing a state where a bite member holds a cloth.

FIG. 9 is a plan view of the crotch sewing machine.

FIG. 10 (A) is a perspective view of pantyhose dough, and FIG. 10 (B) is a perspective view of pantyhose.

FIG. 11 (A) is a plan view showing the occurrence of displacement of the garter line of the cloth attached to the bite member, FIG. 11 (B) is a plan view showing the expanded state of the bite member in the same, and FIG. 11 (C) is a panty. The front view which shows the defective item of stockings.

[Explanation of symbols]

 5 Bite member 6, 7 Bite plate 9 Positioning device 21 Unit base 26 Welt grip 27 Garter line detection sensor 28 Garter line grip

Claims (2)

[Claims] 1. A panty attached to each of the pair of upper and lower bite plates by arranging bite members made up of a pair of left and right bite plates facing each other vertically so as to move along a circumferential trajectory. In a crotch sewing machine designed to sew the crotch part of stocking cloth, the sensor detects the welt part of the panty hose cloth temporarily attached to the bite plate pair and clamps it with the welt grip, and the welt part is paired with the bite plate pair. Welt part pulling process to pull in to a predetermined position along the length direction of the bite plate, and the crotch part is clamped by the garter line grips at the positions of both sides of the tip of the bite plate pair, and along the length direction of the bite plate pair. Retracting, consisting of a garter line retracting process that positions the garter line with sensors arranged on both sides of the bite plate pair, until the upper and lower bite plate pairs approach and bite the crotch,
An automatic positioning method for pantyhose fabric in a rise sewing machine, wherein the welt grip holds the positioning state with the welt portion clamped and the garter line grip holds the garter line positioning state with the crotch clamped. 2. A panty attached to each of the pair of upper and lower bite plates by arranging bite members made up of a pair of left and right bite plates facing each other vertically so as to move along a circumferential trajectory. In a crotch sewing machine that is designed to sew the crotch part of stocking cloth, the crotch is attached to the pair of bite plates so that it can be moved between the pair of bite plates in the longitudinal direction and the vertical direction. When the upper welt part is detected by the sensor, the whole welt part is sandwiched, and the welt part that holds the welt part along the length direction of the sandwich plate to the predetermined position and holds the position is held and the tip part between the pair of upper and lower bite plates. A garter line detection sensor that is arranged so that it can move toward and away from both sides, and the approach and recoil of both pairs of upper and lower biting plates and the movement along the length direction of the biting plates and the approach of the pair of upper and lower biting plates. The movement that follows the movement becomes free, and it bites The upper part of the upper and lower bite plates is composed of a plate and a plate that holds the crotch part with the plate, pulls the crotch part in the length direction of the bite plate, and positions the garter line at the position detected by the garter line detection sensor. The welt grip holds the positioning state with the welt part sandwiched and the garter line grip holds the garter line positioning state until the user approaches and bites the crotch. Automatic positioning device for pantyhose fabrics on top sewing machines.