JP2813317B2 - Fabric position control method and position control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for controlling the position of a cloth.

[0002]

2. Description of the Related Art FIG.
As shown in (b), it is common to provide a bag-shaped portion B in which an annular rubber G is provided along the circumferential direction. In order to form the bag-shaped portion B, as shown in FIG. As shown, the end of the fabric W is bent twice at the first and second folded portions R1 and R2 to form an S shape, and the inside of the second folded portion R2 is along the longitudinal direction (circumferential direction). After the annular rubber G is interposed, a method of sewing the vicinity of the cloth end E and the vicinity of the folded end of the first folded portion R1 may be adopted (Japanese Utility Model Publication No. 63-45258, Japanese Patent Publication No. 59-45392). And Japanese Patent Publication No. 7-153).

[0003]

SUMMARY OF THE INVENTION The vicinity of the fabric edge E and the first
In the work of sewing the vicinity of the folded end of the folded portion R1, the width L1 between the folded ends of the folded portions R1 and R2 and the fabric end E from the folded end of the second folded portion R2 during the fabric feeding to the sewing machine. Up to L2,
In some cases, deviation occurs from each of the predetermined dimensions.

[0004] In the case of such a deviation, the seams meander and the appearance is poor, and in some cases, poor sewing (opening due to non-sewing, etc.), rubber G biting, etc., have occurred. The value was reduced or lost. In addition, in severe cases, the needle of the sewing machine may be broken or the like, leading to a decrease in work efficiency for maintenance and an increase in running costs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and solves various problems in the related art by performing processing such as sewing on a folded portion while accurately maintaining a predetermined dimension. An object of the present invention is to provide a dough position control method and a dough position control device.

[0006]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, in the dough position control method according to the present invention, the pull-in amount of the whole dough is adjusted so that at least one folded end position of the dough having at least one folded portion along the dough feeding direction coincides with the predetermined advance position. Advancing and retracting control orthogonal to the fabric feed direction, and controlling the fold width of the folded portion to be orthogonal to the fabric feed direction so that the fabric end position of the fabric in the folded portion coincides with the predetermined advance position. I have.

In the dough position control device according to the present invention, a folded end provided to be able to detect at least one folded end position with respect to a dough having at least one folded portion along the dough feeding direction. A detection unit, a pull-in control unit provided so that the position of the entire fabric can be changed in the direction perpendicular to the fabric feeding direction by a position correction instruction based on the folding edge detection unit, and a fabric edge position of the fabric in the folding unit. A cloth edge detection unit provided so as to be detectable, and a folding width control unit provided so as to be able to change the folding width of the folded portion orthogonally to the cloth feeding direction by a position correction instruction based on the cloth edge detecting unit. It is characterized by having.

[0008]

In the cloth position control method according to the present invention, during the cloth feeding for sewing or the like, the folded end position or the cloth end position in the folded portion is shifted from each predetermined advance position. In the case of the dough feeding, the feed amount of the whole cloth is given for the folding end position, and the fold width of the folded portion (in this case, it may also affect the drawing amount of the whole cloth) is given for the cloth end position. Advancing / retracting or scaling in a direction perpendicular to the direction is controlled. As a result, both the folded end position and the fabric end position coincide with the respective predetermined advance positions, and the fabric is fed while the folded shape (cross-sectional shape) of the entire folded portion is always kept constant.

In the cloth position control apparatus according to the present invention, in performing the above-described control, the fold end detecting section for detecting the fold end position, and the position correction instruction based on the fold end detection section, the entire cloth is controlled. A pull-in control unit capable of changing the forward / backward position, a cloth edge detecting unit for detecting the cloth edge position, and a folding width control unit capable of changing the folding width of the folded portion by a position correction instruction based on the cloth edge detecting unit. It has a configuration.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a sewing device used to sew the waist of a pants. This sewing device is formed by using a sewing machine 1 as a core, and is made of a pants material (hereinafter, a shape of a portion for forming a waist portion). After that, the setting work of the annular rubber G) and the annular rubber G,
The waist can be sewn automatically.

In the following description, for convenience of explanation, the depth direction in FIG. 1 is referred to as “front”, the front direction is referred to as “rear”, and the left side in FIG. 1 is referred to as “left” and the right side is referred to as “right”. I will say. The sewing device includes left and right reversing guides 3 and 4 for holding the annular fabric W and the annular rubber G in an annular shape with respect to the sewing machine 1, and first and second inversions capable of feeding the annular fabric W and the annular rubber G. Second and third feed portions 6, 7, 8 and an S-shaped folded portion formed by two-folding as shown in FIG. Upstream (right) and downstream (left) fabric edge holding devices 10 and 11 for maintaining the shape, and both fabric edge holding devices 1
It has an initial processing device 14 for finalizing the operation at the initial stage of operations 0 and 11, and a tension adjusting section 15 for applying tension to the erected state of the annular cloth W and the annular rubber G as required.

Of the above, the left reversing guide 3, the first feeding section 6, and the tension adjusting section 15 are fixed to the sewing machine 1 or the work table 18 on which the sewing machine 1 is mounted. On the other hand, the right inversion guide 4, the second and third feed portions 7 and 8, the upstream and downstream dough end holding devices 10 and 11, and the initial processing device 14 are provided on a worktable 18. The XY drive table 19 holds the XY drive table 19, and can be moved back and forth and / or left and right with respect to the sewing machine 1.

In the sewing machine 1, reference numeral 21 denotes a sewing table, which incorporates a cloth feeding claw mechanism, a cloth end trimming mechanism, a thread trimming mechanism (all not shown), and a presser foot above the sewing machine. A sewing machine needle 21a and a sewing machine needle 21b are provided to be vertically movable. Hereinafter, the detailed structure of each component will be described one by one. As shown in FIG. 2, the left reversing guide 3 is located at the sewing position (presser 21a) of the sewing machine 1.
The upper free roller 22 has an upper free roller 22 that protrudes horizontally from the vicinity to the rear thereof, and a lifting pin device 23 provided on the downstream side (left side) of the upper free roller 22.

The lifting pin device 23 is configured such that a lifting piece 24 having a pair of upper and lower pins 23a and 23b moves up and down and horizontally. Reference numeral 25 denotes a lifting drive such as an air cylinder, and reference numeral 26 denotes a turning drive such as a rotary air cylinder. The rotation of the lifting piece 24 is performed by the pins 23a, 23
b is parallel to the upper free roller 22 and the pin 23
Steps a and 23b are performed at about 90 degrees between the state where each protruding end is directed toward the upper free roller 22 (see FIG. 14B).

The first feeding section 6 (see FIG. 1) is configured such that a driving roller 28 can be brought into contact with and separated from the upper free roller 22 from a diagonally lower left side of the upper free roller 22. Reference numeral 29 denotes a rotary driving tool such as an electric motor for the driving roller 28, and reference numeral 30 denotes an advance / retreat driving tool such as an air cylinder for driving the contact / separation. FIG. 3 shows a state in which the drive roller 28 is in contact with the upper free roller 22 to transmit the rotational drive.

The tension adjusting section 15 (see FIG. 1) moves a lower free roller 32 (see FIG. 4) provided in parallel with the upper free roller 22 at an oblique lower right of the upper free roller 22 or the like. It is made movable.
Reference numeral 33 shown in FIG. 4 is a vertical movement driving tool such as an air cylinder. The XY drive table 19 (see FIG. 1) is a bracket 35 fixed on the work table 18 as shown in FIG.
And a left and right moving table 37 that is horizontally movably held in the left and right direction with respect to the front and rear moving frame 36. I have. Both the front and rear moving frame 36 and the left and right moving table 37 are driven by appropriate advancing / retracting means (not shown) such as belt driving.

As shown in FIG. 6, the second feed portion 7 (see FIG. 1) is provided with a plurality of belt driving means 41 along a longitudinal direction around a guide cylinder 40 horizontally projected in the front-rear direction.
Is a bridge. A part near the front end of the annular cloth W is hooked on the outside of the guide tube 40. A main shaft 42 that supports the guide cylinder 40 is provided at the center of the guide cylinder 40.
2 is rotatably held with respect to the upright frame 45 shown in FIG. That is, the second feed unit 7 is provided on the left and right moving table 37 of the XY drive table 19 shown in FIG. Therefore, the third feed unit 8 can move forward, backward, left and right as a whole.
Reference numeral 46 shown in FIG. 7 is a rotary driving tool such as an electric motor for the main shaft 42 (the belt driving means 41).
Is omitted from the drawing).

The second feeder 7 is related to the development of the present applicant, and details other than the above are described in JP-B-63-392.
No. 77, as described. Therefore, the guide cylinder 4
With the rotation of 0, the annular cloth W can be fed toward the sewing machine 1, and the annular cloth W can be moved in the front-rear direction by the running of each belt driving means 41.

The third feeder 8 (see FIG. 1)
As shown in FIG. 6, a drum rotating device 50 and a swing mechanism 51 that enables the drum rotating device 50 to approach and separate from the second feed unit 7 are provided. Drum rotation device 50
A plurality of driving discs 53 are arranged at predetermined intervals along the outer peripheral surface of a drum 52 having a middle swelling cylindrical shape like a drum and rotatable around a horizontal axis (that is, each driving circle). Board 5
3 is provided in a radial arrangement).
Reference numeral 55 denotes a rotary driving tool such as an electric motor for the drum 52 (the rotary driving tool for the driving disk 53 is not shown). Each of the drum 52 and the rotary driving tool 55 is provided for a fan-shaped upright rocking plate 57.

The drum rotating device 50 is also related to the development of the present applicant.
No. 909. Therefore, the drum 5
In a state where the outer peripheral surface (drive disk 53) of 2 is pressed against the annular cloth W, the rotation of the drum 52 enables the annular cloth W and the annular rubber G to be fed toward the sewing machine 1 and each drive. By rotating the disk 53, it can be moved at least in the front-back direction with respect to the annular cloth W.

The oscillating mechanism 51 includes the upright oscillating plate 57
Is reciprocally oscillated about a horizontal pivot 58. Reference numeral 59 denotes a reversing drive such as a rotary air cylinder. The reversal drive 59 is fixed to the upright frame 45 shown in FIG. That is, the third feed unit 8 (drum rotating device 50)
The swing mechanism 51) is provided on the left and right moving table 37 of the XY driving table 19 shown in FIG. Therefore, the third feed unit 8 can move forward, backward, left and right as a whole.

The upright oscillating plate 57 is inverted between a state in which the drum 52 of the drum rotation device 50 is close to the second feed unit 7 by a predetermined distance (a state shown in FIGS. 1 and 6).
This is performed at an angle of about 90 ° with the state in which the drum 52 is retracted obliquely to the upper right from the feeding section 7. As shown in FIG. 6, the right reversing guide 4 (see FIG. 1) includes an upright holding plate 63 provided close to the right half of the guide cylinder 40 of the second feed unit 7, and the upright holding plate 63. It has a plurality of support pins 64 a to 64 d penetrating the plate 63. Standing holding plate 6
3 is connected to the upright frame 45 via a connecting rod 66.
It is fixed on the rear side (see FIG. 7). That is, the right reversing guide 4 is provided on the left and right moving table 37 of the XY drive table 19 shown in FIG. Therefore, the right reversing guide 4 can move forward, backward, left and right as a whole.

Each of the support pins 64a to 64d is connected to the guide cylinder 4
The guide cylinders 40 are arranged at predetermined intervals along the circumferential direction of 0, and are slidable and slidable back and forth in parallel with the guide cylinder 40. These support pins 64a to 64d
Is provided with a rubber recess 65 in which a part of a cylindrical surface is cut out. Then, each of the support pins 64a to 64a
Although not shown on the mechanism, 4d is driven to slide back and forth and rotate as shown in FIGS. 15 (a) and 15 (b). The rotation of each of the support pins 64a to 64d corresponds to the state in which the rubber recess 65 is directed outward in the circumferential direction of the guide cylinder 40 (the state in FIG. 6), and the state in which the rubber recess 65 is directed inward in the circumferential direction (FIG. ) And about 180 °.

As shown in FIG. 7, the upstream fabric edge holding device 10 (see FIG. 1) includes a support plate 70 and a descent plate 71 which project rearward from the upright frame 45 in the front-rear direction. have. The support plate 70 is provided on a first moving piece 73 movably movable back and forth along two upper and lower support shafts 72 protruding from a rear portion of the standing frame 45 so as to protrude rearward from a lower portion thereof. Have been. A first intermediate support plate 74 is fixed to a middle part of both support shafts 72, and a front-rear drive 75 such as an air cylinder is attached to the first intermediate support plate 74.

The upper surface of the support plate 70 is provided with an R-shaped concave portion 70a. This recess 70a
When the third feed unit 8 is close to the second feed unit 7 as shown in FIGS. 1 and 6, the drum 5 of the third feed unit 8
This is provided so that the contact amount between the driving disk 53 and the annular cloth W can be increased while avoiding interference with the driving disk 53.

On the other hand, the descent plate 71 is provided with a first intermediate support plate 74.
The second moving piece 78, which is held movably back and forth along two support shafts 77 protruding from the rear part, is suspended below a lower part thereof via a hanging plate 79 and protrudes forward. It is provided in. Reference numeral 80 denotes a vertical movement driving device such as an air cylinder for moving the suspension plate 79 up and down. A second intermediate support plate 82 is fixed to a middle portion of both support shafts 77, and a front-rear drive unit 83 such as an air cylinder is attached to the second intermediate support plate 82.

Needless to say, the support plate 70 and the descent plate 71 are mounted on the upright frame 45 via the support shaft 72 directly or indirectly, as described above. Fabric edge holding device 10
5 is provided on the left and right moving table 37 of the XY driving table 19 shown in FIG. Therefore, the upstream-side dough-end holding device 10 can be moved forward, backward, left and right as a whole.

The downstream-side fabric edge holding device 11 (see FIG. 1) is located behind the columnar frame 88 as shown in FIG.
It has a support plate 90 and an insertion finger body 91 that project toward each other along the front-rear direction. Since the columnar frame 88 is fixed to the front and rear moving table 36 of the XY drive table 19 shown in FIG. 5, the downstream fabric end holding device 11 can only move in the front and rear direction as a whole.

The downstream-side fabric edge holding device 11 is provided with a sagging prevention device 92, a lifting prevention device 93, and a fabric removal device 94. The support plate 90 (see FIG. 8B) is held movably back and forth along the left and right upper and lower two of the four support shafts 97 projecting rearward from the lower side of the columnar frame 88. The first moving piece 98 is provided so as to protrude rearward from the upper portion thereof.
A first intermediate support plate 99 and a second intermediate support plate 100 are fixed to an intermediate portion of the support shaft 97. Among them, a longitudinal movement driving tool 101 such as an air cylinder is attached to the second intermediate support plate 100. I have.

On the other hand, the insertion finger body 91 has a pair of upper and lower finger pieces that form a bifurcated shape toward the front, and has two upper and lower supporting members projecting rearward from the upper side of the columnar frame 88. The second moving piece 105 is slidably suspended below a second moving piece 105 held along a shaft 104 via a hanging plate 106, and is provided so as to protrude forward. 10
Reference numeral 7 denotes a vertical movement driving device such as an air cylinder for vertically moving the hanging plate 106. In the middle of both support shafts 104, a third
An intermediate support plate 108 is fixed, and a front-rear drive unit 109 such as an air cylinder is attached to the third intermediate support plate 108. A shaft length adjusting unit 110 is attached to the base of the support shaft 104. 111 is an advance / retreat driving tool such as an air cylinder.

The sagging prevention device 92 includes a support plate 90
Large tongue 113 provided at a predetermined interval below
The tongue piece 113 is provided on the first intermediate support plate 99.
5 makes it possible to move back and forth. The lifting prevention device 93 includes a pressing urging plate 116 provided on the upstream side (right side position) of the support plate 90 so as to be slightly higher than the support plate 90 and to protrude backward from the support plate 90. It had. This pressing biasing plate 116 is
A fourth intermediate support plate 118 fixed behind the first intermediate support plate 99 with respect to the book support shaft 97 so that the fourth intermediate support plate 118 can be moved back and forth together with the bracket 120 by a forward and backward movement driving tool 119 such as an air cylinder. It is.

The cloth removing device 94 is further upstream (to the right of the pressurizing plate 116) than the pressing urging plate 116 and the supporting plate 9.
Push-back piece 12 that stands by while retracting forward from 0
1 and the push-back piece 121 is
It can be moved back and forth by a back and forth drive 122 such as an air cylinder provided on the intermediate support plate 118. The initial processing device 14 includes, as shown in FIG.
Of the sewing machine 1 by means of an arm stand type bending stay 126 provided so as to straddle the upper and lower cloth edge holding devices 10 and 11 from the left and right moving table 37 of the sewing machine 1. Has become. Therefore, it goes without saying that the initial processing device 14 can be moved forward, backward, left and right as a whole.

As shown in FIG. 9, the initial processing device 14 includes a telescopic arm 127 extending rearward from the distal end of a bent stay 126,
7 has a gripper section 128 provided at the front end (rear end) so as to be vertically movable. In the telescopic arm portion 127, reference numeral 130 denotes a movable piece that is movable along the guide bar 131, and reference numeral 132 denotes a longitudinal movement driving tool such as an air cylinder held by a support plate 133 fixed between the guide bars 131. . In the gripper unit 128, 1
Reference numeral 35 denotes an elevating base, which is suspended from the moving piece 130 by an up-and-down driving device 136 such as an air cylinder, and is guided up and down along a guide bar 137.

As shown in FIG. 10, the gripper portion 128 is a lower tongue piece 1 protruding forward from the lifting base 135.
39 and the upper tongue piece 1 held at the upper part so as to be able to swing up and down
And an opening / closing drive 141 such as an air cylinder that is provided on the lifting base 135 and drives the upper tongue piece 140. A sewing apparatus having such components (FIG. 1)
) Further includes an operation control device, a position control device, and a fabric posture processing device as attached functions to the entire configuration.

Although not shown, the operation control device automatically starts or stops the necessary operation (for example, the set-up operation or retreating operation of each component) in accordance with the movement of the worker or the progress of sewing. It is configured to judge or to make an emergency stop. For example, a sensor capable of detecting the right hand of the worker is provided above the right reversing guide 4. Therefore, when this sensor outputs a detection signal for the first time, it is determined that the annular rubber G has been stretched between the left and right reversing guides 3 and 4, and the set-up operation of the upstream fabric end holding device 10 is automatically started. When this sensor issues a detection signal next time, it is determined that the annular cloth W has been stretched, and the setup operation of the left reversing guide 3 is automatically started.

In the vicinity of the lowermost support pin 64d of the right reversing guide 4, a sensor capable of detecting a sewing start position of the annular cloth W is provided. Therefore, when this sensor outputs a detection signal, the retracting movement of the support pins 64a to 64d of the right reversing guide 4 is automatically started in preparation for sewing completion (the operation will be described later).

[0037] In addition to the above, the operation control device may be configured to stop all functions upon completion of sewing, perform the same reset operation,
Appropriate sensors and control circuits are provided at appropriate places so that the sewing machine 1 can perform an emergency stop or the like when a thread breaks, a needle breaks, or a fabric breaks. The position control device is operated by the upstream fabric edge holding device 10 (see FIGS. 1 and 7) as shown in FIG. 11 and the downstream fabric edge holding device 11 (see FIGS. 1 and 8) as shown in FIG. reference)
With this operation, the folded shape is prevented from being displaced in the process of sewing while the folded portion is formed near the front end of the annular cloth W.

That is, as shown in FIG. 11, the position control device includes a folded end detecting section 150 and a cloth end detecting section 151 provided for the support plate 70 of the upstream cloth end holding device 10, and both of them. It has a pull-in control unit and a folding width control unit that are operated by the detection units 150 and 151. Each of the folded edge detection unit 150 and the cloth edge detection unit 151 uses a non-contact type (transmission type or reflection type) optical sensor.

The fold end detecting section 150 is provided below the support plate 70, and can detect whether or not the fold end position in the annular fabric W matches a predetermined advance position. Further, the cloth edge detection unit 151 is provided above the support plate 70, and can detect whether or not the cloth edge position in the annular cloth W matches the predetermined advance position.
In any case, when the inconsistency state with respect to the predetermined advance position is determined, the belt driving means 41 of the second feed unit 7 and / or the driving disk 53 of the third feed unit 8 (both refer to FIG. 6). , And necessary position correction instructions are sent, and these can be operated by a predetermined amount.

That is, when the folded-end detecting unit 150 determines that there is a mismatch, a position correction instruction is sent to at least the belt driving means 41 of the second feed unit 7 to position the annular fabric W as a whole in the front-rear direction. It is something to move forward and backward. Thus, the above-described pull-in control unit is configured. Further, when the cloth edge detecting unit 151 determines a mismatch state, it sends a position correction instruction to at least the driving disk 53 of the third feeding unit 8 to expand / contract the folded width of the folded portion in the front-back direction. Thus, the folding width control unit is configured.

It should be noted that although the folded edge detecting section 150 determines the coincidence state, only the cloth edge detecting section 151 judges the mismatched state, or conversely, the cloth edge detecting section 151 Even when the state is determined, the case where only the folding edge detection unit 150 determines the mismatch state may naturally occur. Accordingly, the retracting control unit may operate the driving disk 53 of the third feed unit 8 based on the position correction instruction from the folding end detecting unit 150, and similarly, the folding width control unit may operate the driving disk 53. In some cases, the belt driving unit 41 of the second feeding unit 7 may be operated based on a position correction instruction from the cloth edge detection unit 151.

The dough attitude processing apparatus is configured to blow compressed air in a predetermined direction at a predetermined timing onto the circular dough W at a predetermined timing during the operation of each component. In this way, the annular fabric W is provided with a tension to improve wrinkle growth and drive transmission efficiency, or to perform fabric sorting on the annular fabric W.

There are various types of cloth orientation processing apparatuses. Among them, the most typical and important one is a cloth feeding control apparatus shown in FIGS. 12 and 16 (a). . This dough feed control device is configured by a combination of an air pressing portion 155 such as an air nozzle that moves up and down integrally with the dive plate 71 of the upstream dough end holding device 10 and the second feed portion 7. When the plate 71 descends, compressed air is blown from the air pressing part 155 toward the upper part of the second feeding part 7.

The compressed air ejected from the air pressing portion 155 causes the rear portion of the annular cloth W, which is not engaged with the support pins 64a to 64d of the right reversing guide 4, to pass through the second feeding portion 7.
(It is pressed against the belt driving means 41 in the upward state. Accordingly, the feed driving in the cloth feeding direction and the moving driving in the direction perpendicular to this (front-back direction) are performed on the annular cloth W. It is possible to transmit with high efficiency.

The cloth feed control device is, for example, a guide tube 40 of the second feed unit 7 although not shown.
It is also possible to replace the configuration (see FIG. 6) with a suction roller structure, or to use a combined use. In other words, the air around the guide cylinder 40 is sucked from between the belt driving units 41 to enable the annular cloth W to be held in contact.

In addition to the above-described cloth posture processing apparatus, this type of cloth posture processing apparatus blows compressed air downward from the lower surface of the suspension plate 79 holding the descent plate 71 to assist the pressing action by the air pressing portion 155. (Not shown), the compressed air is blown out from the lower part of the descent plate 71 to the front to assist the folding operation shown in FIG. 11 (not shown). The compressed air is blown out from the lower part of the support plate 70 and the like to separate the dough. A device that blows compressed air from the upper part of the insertion finger body 91 of the downstream fabric end holding device 11 (see FIG. 13) to the front thereof to assist the folding operation shown in FIG. 13 (not shown);
FIG. 16 is a diagram in which compressed air is blown backward from the lower portion of the support plate 90 or the rear end of the tongue piece 113 to perform dough separation.
As shown in (b), various types are provided, such as an air pressing portion 158 that blows compressed air from above the left reversing guide 3 to the outer peripheral side of the upper free roller 22 to make the annular fabric W taut.

Next, the operation of each component (the specification of each driving tool will be omitted) will be described based on the sewing procedure by the sewing device. Initially, the XY drive table 19 (FIGS. 1 and 5)
) Is in a standby state with the front and rear moving frame 36 retracted to the front and the left and right moving table 37 retracted to the right. The swing mechanism 51 of the third feed unit 8 (see FIG. 6) is
Is swung upward, and the upstream fabric end holding device 10 (FIG. 7)
Each of the components such as the support plate 70 and the descent plate 71 are separated from each other, and the downstream fabric edge holding device 11 (see FIG. 8) separates the support plate 90 and the insertion finger body 91 from each other. The standby state is such that the setting of the annular rubber G and the annular cloth W can be easily performed.

Therefore, first, the annular rubber G is spread between the left and right reversing guides 3 and 4 (see FIG. 1). When the sensor of the operation control device detects that the operator's right hand has left the right reversing guide 4, the front and rear moving frame 36 of the XY drive base 19 moves rearward to a predetermined position as necessary, and FIG. As shown, the support plate 70 of the upstream fabric edge holding device 10 moves backward and projects above the annular rubber G.

Next, the annular rubber G spanned as described above
Around the outside in the same manner.
For the support plate 70 of the upstream fabric edge holding device 10,
As a matter of course, it is put on the upper side. When the sensor of the operation control device detects that the operator's right hand has left the right reversing guide 4, the swing mechanism 51 of the third feed unit 8 (see FIG. 6) swings the drum rotating device 50 downward. Therefore, the drum 52 sandwiches the annular fabric W between the drum 52 and the support plate 70 of the upstream fabric edge holding device 10 (see FIGS. 1 and 16A).

Further, as shown in FIG. 11, in the upstream fabric end holding device 10, the descent plate 71 is lowered and moved forward, and the corresponding portion of the front end of the annular dough W is combined with the front end of the descent plate 71. Bearing plate 70 in a backward and stopped state
Is folded twice with the rear end to form an S-shape. FIG.
As shown in the figure, in the downstream fabric end holding device 11, the lowering and advancement of the insertion finger body 91 and the backward movement of the support plate 90 are performed in parallel, and the corresponding portion of the front end of the annular fabric W is supported by the support plate 90. Is pushed into the crotch of the insertion finger body 91 by the rear end portion, and similarly formed into an S-shape by two-fold. At this time, the annular rubber G is pushed up onto the support plate 90 as the insertion finger 91 descends.

As shown in FIGS. 14A to 14C, the initial processing device 14 and the lifting pin device 23 of the left reversing guide 3 are used.
Start operating in parallel with each other. First, FIG.
As shown in (a), lifting of the ring rubber G and the ring cloth W by raising the lifting pin device 23 (the upper free roller 22
It is preferable that the gripper unit 128 in the initial processing device 14 is lowered, moved forward, and the gripper unit 128 holds the annular cloth W and the annular rubber G in this order. The above-described lifting by the lifting pin device 23 is a pre-process for easily and reliably holding the annular cloth W and the annular rubber G by the gripper unit 128.

At this time, the underwater plate 71 (see FIG. 11) of the upstream fabric edge holding device 10, the insertion finger 91 (see FIG. 13) of the downstream fabric edge holding device 11, and the air pressing portion 155 (Refer to FIG. 12), compressed air is blown out from the belt driving means 41 of the second feed unit 7.
(See FIG. 6), and the cloth is sorted by blowing (stretching wrinkles) toward the rear of the sewing apparatus in a streamer-like manner.

In this state, the lifting pin device 23 is lowered and turned as shown in FIG. In addition,
At this time, the upstream and downstream fabric edge holding devices 10, 1
If the above set-up operation by 1 has not been completed, these are given priority and the completion is waited for. And XY
The left and right moving table 37 of the driving table 19 (see FIG. 1) moves to the left, and as shown in FIG. 14C, the initial processing device 14 as a whole moves to the left. As a result, as shown in FIG. 16A, the annular cloth W and the annular rubber G sandwiched by the initial processing device 14 (gripper section 128) are drawn out downstream of the sewing machine 1.

When the left and right moving table 37 moves to the left, the upstream fabric end holding device 10 also moves to the left, so that the annular fabric W is folded back by the support plate 70 and the descent plate 71. The state in which the annular rubber G is sandwiched therein is approached toward the downstream-side fabric edge holding device 11. From this, between the downstream dough end holding device 11 and the initial processing device 14 separated therefrom,
The folded state of the annular fabric W is determined between the downstream fabric edge holding device 11 and the upstream fabric edge holding device 10 (the folding line is appropriately formed, and the annular fabric W is annular in the folded portion). Rubber G is passed straight through).

When the left and right moving table 37 is moved to the left, not only the upstream fabric end holding device 10 but also the second feeder 7
The third feed portion 8, the right reversing guide 4, and the like also move to the left together (illustration thereof is omitted in FIG. 16A).
At this time, a large slack occurs in the annular cloth W and the annular rubber G particularly due to the right reversing guide 4 moving leftward. Therefore, in this case, in order to prevent the annular rubber G from coming off or being displaced, the tension adjusting unit 15 (FIG.
), The lower free roller 32 is lowered.

Next, in the sewing machine 1, the presser foot 21a is lowered, and the annular cloth W is clamped. Thereafter, the lifting pin device 23 and the initial processing device 14 return to their respective reset states. In addition, the left and right moving table 37 of the XY drive table 19 returns to the right, and accordingly, the upstream fabric end holding device 10, the second feeding section 7, the third feeding section 8, the right reversing guide 4, and the like also move. Return to the right. At this time, in the second feed unit 7, the guide cylinder 40 (see FIG. 6) is rotated to the left in synchronization with the movement amount.

Next, as shown in FIG. 16 (b), the first feed portion 6 (see FIGS. 2 and 3) is close to the upper free roller 22, and the annular cloth W and the annular rubber G, and compressed air is blown out from the air pressing portion 158 to form the annular cloth W with respect to the upper free roller 22.
And the winding of the annular rubber G is ensured. Further, the swinging mechanism 51 of the third feed portion 8 (see FIG. 6) swings, and the drum 52 is moved with respect to the support plate 70 of the upstream fabric end holding device 10.
Are brought close to each other so that the annular cloth W is sandwiched between them.

As a result, the drive in the cloth feeding direction and the direction perpendicular to the cloth feeding direction and the direction perpendicular to the ring cloth W and the annular rubber G can be transmitted. Furthermore, as described above, the upstream fabric edge holding device 10
Compressed air is blown out from the submersion plate 71, the air pressing portion 155, and the like. Therefore, as shown in FIG. 12, the rear portion of the annular cloth W that does not engage with the support pins 64 a to 64 d of the right reversing guide 4 is the belt driving unit 41 of the second feed unit 7.
It is in the state pressed against. Therefore, also in this case, the driving is transmitted to the annular fabric W in the fabric feeding direction and the direction perpendicular to the fabric feeding direction (front-back direction).

Then, as shown in FIG. 16B, the lower free roller 32 of the tension adjusting section 15 is raised. After these settings are completed, the sewing machine 1 performs automatic sewing and the first, second, and third feeding sections 6, 7, and 8 synchronized with a cloth feeding claw mechanism (not shown) provided on the sewing machine 1 itself. Is started.

During sewing, in the upstream fabric end holding device 10, the second feeding portion 7, the third feeding portion 8, and the like, control by the position control device having the pull-in control portion and the folding width control portion is executed, and As described above, the displacement of the folded shape of the cloth W is prevented. As described above, the front end portion of the annular fabric W where the folded portion is formed (the portion where the urging force in the diameter reducing direction by the annular rubber G is acting) is
It is hung on the support pins 64a to 64d of the right reversing guide 4. That is, it is in a state of being lifted from the belt driving unit 41 of the second feed unit 7. Therefore, the control by the position control device is easily performed.

The sewing of the annular cloth W by the sewing machine 1 is advanced while the folded shape is maintained in the predetermined state as described above (see FIG. 17).
6d (FIG. 6 and FIG. 15A)
), The sewing machine 1 is sewn and fed by the cloth feed claw mechanism, and the first, second, and third feed sections 6, 7, and
8 is synchronously decelerated.

The right reversing guide 4 is connected to each support pin 6
In FIGS. 4a to 64d, 180 as shown in FIG.
Rotation and retraction sliding as shown in FIG. 15B are performed, and the annular cloth W and the annular rubber
Remove. Therefore, the degree of engagement of the annular cloth W and the annular rubber G with the second feed portion 7 is increased (FIG. 16).
(C)).

The first reason for performing the above operation in the right reversing guide 4 is that the difference in the circumferential length between the annular cloth W and the annular rubber G is cumulatively pushed to the unsewn portion. If sewing is continued as it is, wrinkles will be generated. The second reason is that
The purpose is to prevent the sewing start position of the annular fabric W from being caught on the support plate 70 of the upstream fabric edge holding device 10 and unable to return to the sewing machine 1.

In this embodiment, in order to prevent the annular cloth W and the annular rubber G from coming off from the second feed portion 7, the lower two support pins 64c and 64d rotate and retract first. After sliding, the upper two support pins 64a, 64b are rotated and retracted.
Then, while the second and third feed portions 7 and 8 are in the non-drive state, the sewing and sewing of the sewing machine 1 and the feed by the fabric feed claw mechanism and the feed by the first feed portion 6 are performed while being synchronized. While moving the left and right moving table 37 of the XY driving table 19 (that is,
The upstream fabric edge holding device 10 and the second and third feeding portions 7, 8 are moved to the left (as a whole).

After the left and right moving table 37 of the XY drive table 19 has reached the left limit position, the sewing and feed of the cloth feed claw mechanism by the sewing machine 1 and the feed by the first feed unit 6 are temporarily stopped. Then, the upstream fabric end holding device 10 performs the forward movement of the support plate 70 and the retreat and rise of the descent plate 71 (an operation reverse to the movement shown in FIG. 11) to release the annular fabric W. Also, in parallel with or following these,
The lower free roller 32 of the tension adjusting section 15 moves down again to maintain the tension acting on the annular cloth W and the annular rubber G.

Thereafter, the left and right moving table 37 of the XY drive table 19 returns to the right. At this time, the guide cylinder 40 (see FIG. 6) of the second feed unit 7 performs clockwise rotation synchronized with this,
The tension of the annular cloth W and the annular rubber G is maintained. next,
In the upstream fabric edge holding device 10 (see FIG. 11), the support plate 70 moves backward (projects toward the annular fabric W) again. And at least the folding width control unit in the position control device,
While controlling the belt driving means 41 (see FIG. 15 (b)) of the second feeder 7 so as to make the cloth end position coincide with the predetermined advance position (while preventing the displacement of the folded shape in the annular cloth W and smoothing the wrinkles). ), Sewing by the sewing machine 1 and feeding by the cloth feeding claw mechanism, and first, second, and third feeding portions 6,
Feeding by 7, 8 is resumed.

After the sewing machine 1 detects that one round sewing of the annular cloth W has been completed, all the components return to the initial set positions and states, and the thread cutting mechanism ( (Not shown) operates. Finally, the cloth removing device 94 (see FIG. 8) causes the push-back piece 121 to project rearward, and the belt driving means 4 of the second feed unit 7.
Reference numeral 1 (see FIG. 15B) drives backward to extrude the sewn annular cloth W.

The present invention is not limited to the above embodiment. For example, in the annular fabric W, the material quality, the sewing shape, the sewing location, the sewing purpose (points due to rubber insertion, etc.) are not limited at all. Further, it is not limited that the fabric is annular or clothing. Further, it is not limited that the position control of the fabric is required in combination with sewing.

The folded portion may be one-fold (J-shaped) or three or more times. The structures, mechanisms, driving tools, and the like described in the respective components are not limited at all, and can be appropriately replaced with conventionally known components.

[0070]

In the cloth position control method according to the present invention, during the cloth feeding for sewing or the like, the folded end position or the cloth end position in the folded portion is shifted from each predetermined advance position. In such a case, the retracting amount of the entire fabric is controlled with respect to the folded end position, and the folding width of the folded portion is controlled with respect to the fabric end position in the direction perpendicular to the fabric feeding direction. As a result, both the folded end position and the fabric end position are matched with the respective predetermined advance positions, and the fabric is fed while the folded shape as the entire folded portion is always kept constant. Therefore, for example, processing such as sewing on the folded portion can be performed in a state where the predetermined dimension is accurately maintained.

In the cloth position control apparatus according to the present invention, in performing the above-described control, the fold end detecting section for detecting the fold end position and the position correction instruction based on the fold end detection section perform the entire cloth. A pull-in control unit capable of changing the forward / backward position, a cloth edge detecting unit for detecting the cloth edge position, and a folding width control unit capable of changing the folding width of the folded portion by a position correction instruction based on the cloth edge detecting unit. It has a configuration.

[Brief description of the drawings]

FIG. 1 is a front view showing the entire sewing apparatus.

FIG. 2 is a perspective view showing a first feed unit and a left reversing guide.

FIG. 3 is an enlarged view of a main part showing an operation state of a first feed unit.

FIG. 4 is a perspective view showing a tension adjusting unit.

FIG. 5 is a perspective view showing an XY drive base.

FIG. 6 is a perspective view showing a second feed unit, a third feed unit, and a right reversing guide.

FIG. 7 is a perspective view showing the upstream fabric edge holding device.

8 (a) is a perspective view showing a downstream-side fabric edge holding device, a sagging prevention device, a lifting prevention device, and a fabric removal device, and FIG. 8 (b) is an extractive view of a driving structure of a support table. It is a perspective view.

FIG. 9 is a perspective view showing an initial processing device.

FIG. 10 is a side view showing the gripper unit.

FIG. 11 is a side view showing an operation state of the upstream fabric edge holding device and the position control device.

FIG. 12 is a side view showing the state of engagement of the annular cloth with the second feed portion and the right reversing guide.

FIG. 13 is a side view showing an operation state of the downstream-side fabric edge holding device.

FIGS. 14A and 14B show the linking operation of the lifting pin device of the left reversing guide and the gripper unit of the initial processing device, wherein FIG. 14A is a front view, FIG. 14B is a plan view, and FIG. .

FIG. 15 shows an operation state of a right reversing guide.
(A) is a front view, (b) is a side view.

FIG. 16 is an explanatory diagram of an operation outline of the entire sewing apparatus.

FIG. 17 is a diagram illustrating a situation in which an annular rubber is sewn into a waist part of pants.

FIG. 18 is a diagram illustrating a conventional situation in which an annular rubber is sewn on a waist portion of pants.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sewing machine 3 Left reversing guide 4 Right reversing guide 6 1st feed part 7 2nd feed part 8 3rd feed part 10 Upstream side fabric end holding device 11 Downstream side fabric end holding device 14 Initial processing device 15 Tension adjusting unit W Annular fabric G Annular rubber

Claims (2)

(57) [Claims] 1. A cloth (W) having at least one folded portion along a cloth feeding direction so that at least one folded end position coincides with a predetermined advance position.
The overall retracted amount is controlled to advance and retreat in a direction perpendicular to the fabric feeding direction, and the folding width of the folded portion is perpendicular to the fabric feeding direction so that the fabric end position of the fabric (W) in the folded portion matches the predetermined advance position. A dough position control method, characterized by scaling. 2. A folded end detection section (150) provided to detect at least one folded end position with respect to the cloth (W) having at least one folded section along the cloth feeding direction; A pull-in control unit provided so as to be able to change the position of the entire fabric (W) orthogonally to the fabric feeding direction by a position correction instruction based on the folding end detection unit (150) and to change the position of the fabric (W) in the folding unit. The fold width of the folded portion can be scaled up and down orthogonally to the cloth feed direction by a cloth edge detection section (151) provided to detect the cloth edge position and a position correction instruction based on the cloth edge detection section (151). And a folding width control unit provided in the fabric position control device.