JPH06121884A - Sewing apparatus - Google Patents

Abstract

PURPOSE:To enable automatic contraction sewing in taking one work cloth on the other while putting ends of both upper and lower work cloths together by providing an upper and lower work cloths feeding means, an upper and lower work cloths moving means, both upper and lower cloth ends detecting means, etc. CONSTITUTION:To prepare sports shoes made of work cloths, cloth ends of an insole cloth made of upper cloth and a shell cloth made of lower cloth are profile sewn while taking the lower cloth in the upper cloth. A sewing apparatus provided with an industrial final sewing machine is provided with an upper and lower feeding means for feeding the upper and lower work cloths sewn in piles and an upward-downward moving means for moving the respective work cloths in the direction orthogonal to the feeding direction and an upper and lower work cloth ends detecting means to detect notches and cloth ends of the respective work cloths, count increments of a notch counter in every notch and control an amount of taking the lower work cloth in the upper work cloth according to the counter value. Further, the number of stitches is counted and a desired reference position in a sewing section is read out to control the cloth ends.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing device for sewing upper and lower work cloths one on top of the other, and in particular, one work cloth is processed to another work while matching the ends of the upper work cloth and the lower work cloth. The present invention relates to one in which both upper and lower work cloths are sewn while impressing on the cloth, following the cloth edges.

[0002]

2. Description of the Related Art Generally, when making an athletic shoe made of a work cloth, as an initial sewing operation, there is a lap stitch in which an insole cloth and an instep cloth are laid and sewn together. In order to sew the instep cloth to the insole in three dimensions, especially in the toe part, it is necessary to set the instep cloth feed amount to be larger than the insole cloth feed amount and to push in the instep cloth. There is.

By the way, conventionally, a sewing machine as shown in FIG. 39 has been put to practical use as a sewing device for overlapping and sewing these insole cloth and upper cloth. This sewing sewing machine will be briefly described. An operating lever 203 is pivotally supported on a bed portion 201 by a step screw 204, and an intermediate plate 205 is fixed to a tip portion of the operating lever 203. At the time of sewing, the tip portion of the intermediate plate 205 is moved between the presser foot 206 and the feed dog 207 as illustrated. Then, on the needle plate 208, the insole cloth U for sports shoes is provided.
Bearing 20 that regulates the cloth edge position between W and upper cloth DW
9 is rotatably supported. On the other hand, the pedestal portion 202 has a cylinder 211 for operating the reverse rotation lever 210.
Is installed.

When these two cloths UW and DW are overlapped and the toe portion is sewn along the cloth end, first, the upper cloth D is sewn.
W is set on the needle plate 208, the tip of the middle plate 205 is placed on the upper side thereof, the middle bottom cloth UW is set on the upper side thereof, and a switch (not shown) is operated to operate the cylinder 21.
The reverse rotation lever 210 is pushed down by the operation of 1. Then, the presser foot 206 is lowered to start sewing. Therefore, during the sewing operation, the operator grips the upper cloth DW and the insole cloth UW with his / her hand, and moreover, does not slacken only the upper insole cloth UW, and strongly in the front direction (direction opposite to the feeding direction). By pulling, only the instep cloth DW is bullied,
The toe portions of these two cloths UW and DW can be sewn together in a three-dimensional manner.

Further, Japanese Utility Model Publication No. 53-13532 discloses a differential cloth feed mechanism having a main feed dog and a sub feed dog,
With a sew-in stitch conversion mechanism, set the upper cloth on the lower side and the insole cloth on the upper side of the needle plate, and insert the presser piece between the upper cloth and the insole cloth. ,
There is described a sewing device in which only the insole cloth is pulled in by pulling strongly only the insole cloth while grasping the instep cloth and the insole cloth by hand.

[0006]

However, as shown in FIG.
In any of the sewing machine shown in FIG. 1 and the sewing machine described in Japanese Utility Model Publication No. 53-13532, the sewing work is performed so that the cloth ends of the upper cloth and the insole cloth are matched with each other and only the upper cloth is bulged. While grasping the instep cloth and the insole cloth with your hand, while pulling only the insole cloth strongly toward the front side, lap stitching that follows the edge of the cloth is performed, so a high degree of skill is required for this lap stitching work. In addition, there is a problem in that the operator suffers from muscle pain such as a hand, a finger and a wrist.

Furthermore, in order to make it easy to perform contour stitches following the cloth edge when performing overlapped stitching, these sewing machines are provided with Japanese Patent Publication No. 54-32389 and Japanese Patent Publication No. 58-4.
It is conceivable to apply the cloth edge control device described in Japanese Patent No. 8199. These cloth edge control devices are configured to set only one reference position for obtaining the deviation of the cloth edge position, and the cloth edge shape at the toe part or heel part of the instep cloth or insole cloth is Since it is composed of a straight line and a plurality of types of curved lines, a desired seam allowance can be obtained only when sewing an optimum straight line portion or a curved portion having a specific radius of curvature at this reference position. However, when a curved portion having a radius of curvature other than that is sewn, the seam allowance changes depending on the size of the radius of curvature, and therefore, there is a problem that the cloth edge copying stitches have a poor appearance.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to align one of the upper and lower work cloths with each other, and to fit one work cloth to the other work cloth. It is an object of the present invention to provide a sewing device that is designed to automate the overlapping stitching that involves the jamming.

[0009]

In order to achieve the above-mentioned object, a sewing device according to a first aspect of the present invention is configured such that, as shown in the functional block diagram of FIG. Respectively, upper feed means and lower feed means capable of independently feeding the cloth, and upper work cloth moving means and lower work cloth capable of independently moving the upper work cloth and the lower work cloth in a direction orthogonal to the cloth feed direction. The moving means, the edge of the upper cloth and the edge of the lower cloth,
Upper cloth edge detecting means and lower cloth edge detecting means that can be independently detected, and feed storing means that stores data related to relative feed of the upper and lower work cloths in advance in association with the sewing position of the work cloth, and both. Cloth edge position data storage means that stores the reference positions of the cloth edges of both work cloths at the detection position of the cloth edge detection means in advance in association with the sewing position, and a sewing position that detects the current sewing position of both work cloths. First control means for controlling the upper feed means and the lower feed means based on the detection means, the output of the sewing position detection means, and the data of the feed storage means, the output of the sewing position detection means, and the cloth end position data. A second control means for controlling the upper work cloth moving means and the lower work cloth moving means is provided based on the data of the storage means. The feed storage means may be configured to store, as the data relating to the relative feed, the data of the cloth feed ratio of the feed amount of the lower work cloth to the feed amount of the upper work cloth.

[0010]

In the sewing apparatus having the above structure, the feed storage means stores in advance the data relating to the relative feed of the upper and lower work cloths in association with the sewing position of the work cloths. In the cloth edge position data storage means, the reference positions of the cloth edges of the upper and lower work cloths at the detection positions of the upper and lower cloth edge detection means are stored in advance in association with the sewing position. The upper feed means and the lower feed means are controlled based on the output of the current sewing position from the sewing position detection means and the data of the feed storage means. Further, at the same time, the second control means outputs the output from the sewing position detecting means,
Based on the outputs from both the upper and lower cloth edge detecting means and the data of the cloth edge position data storing means, the upper work cloth moving means and the upper work cloth moving means are set so that the cloth edge position of the work cloth coincides with the reference position corresponding to the sewing position. By controlling the lower work cloth moving means, the cloth end position is moved in the direction orthogonal to the cloth feeding direction.

As described above, the upper and lower work cloths have their respective end positions displaced so that the end positions of the work cloths become the reference positions, and one work cloth is presently different from the other work cloth at present. Since the cloth is fed according to the value related to the relative feed corresponding to the sewing position, it is possible to automate the overlap sewing in which the cloth edges of the upper and lower work cloths are aligned and the work cloth of one of them is squeezed. be able to. Furthermore, for both upper and lower work cloths, the reference position corresponding to the current sewing position according to the progress of the sewing process is sequentially changed and set, and the deviation of the cloth end position is eliminated based on the changed reference position. Since the cloth is moved, even if the cloth edge has a complicated shape including a plurality of types of curves and straight lines having different radii of curvature, a predetermined stitching allowance can always be secured, and the contour stitching can be performed with good appearance.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The present embodiment is a case where the present invention is applied to a sewing machine equipped with an industrial lockstitch sewing machine. This sewing device SM is a device for making an athletic shoe made of a work cloth, in which the midsole cloth is the upper cloth and the upper cloth is the lower cloth, and these cloth end portions are sewn along while being shirred. Basically, it is composed of a lockstitch sewing machine M and a cloth edge control device 15. First, the lockstitch sewing machine M will be explained. Since this sewing machine M is similar to a general industrial lockstitch sewing machine, it will be briefly explained. And As shown in FIG. 2, the lockstitch sewing machine M is mounted on a work table T and has a sewing machine bed portion 1, a pedestal portion 2 erected from the right end of the bed portion 1, and the pedestal portion thereof. 2 and an arm portion 3 extending leftward so as to face the bed portion 1. The bed 1 is provided with a feed dog up-and-down mechanism (not shown) that moves the lower feed dog 8 up and down, a feed dog forward-backward movement mechanism (not shown) that moves back and forth, and a thread catcher (not shown). ing.

Further, in the arm portion 3, a needle bar drive mechanism for vertically moving a needle bar (not shown) to which a sewing needle 4 (see FIG. 17) can be attached at the lower end, and a balance (not shown) are provided above and below the needle bar. A balance driving mechanism (not shown) that moves up and down in synchronization with the movement is provided. A presser bar is vertically movably supported on the sewing machine frame F on the rear side of the needle bar, and a presser foot 6 (see FIG. 3) is attached to the lower end of the presser bar. by the way,
This presser bar and the upper feed dog 7 for feeding the insole UW
(See FIG. 4) is a presser foot driving solenoid 159 described later.
The presser bar and the upper feed dog 7 are connected to each other (see FIG. 20) and are switched to the retracted position which is raised by the drive of the presser foot driving solenoid 159 (see FIG. 20), and the solenoid 159 is driven. When is stopped, the position is switched to the lowered working position.

Therefore, the mechanism for vertically moving the feed dogs of the lower feed dog 8 and the upper feed dog 7, the needle bar drive mechanism and the balance drive mechanism are driven by the sewing machine motor 140. Also, the lower feed dog 8
Is driven back and forth via the feed dog front-back movement mechanism at a feed amount according to the inclination of the feed controller that is changed by the drive amount of the linear solenoid 161 (see FIG. 20). Furthermore, the upper feed dog 7
Is a motor 16 for the upper feed dog which is a stepping motor.
It is driven back and forth through the feed dog back and forth moving mechanism at a feed amount according to the inclination of the feed controller which is changed by a rotation amount of 0 (see FIG. 20). A sewing machine motor 140 is disposed immediately below the work table T and is attached to the work table 9 that supports the work table T. An operation panel 10 is attached to the lockstitch sewing machine M, and the operation panel 10 is provided with a plurality of operation switches necessary for sewing work.

By the way, the cloth edge control device 15 basically includes a cloth receiving plate driving device 16 and an upper cloth moving device 17 provided between the bed portion 1 and the arm portion 3, and a lower portion of the bed portion 1. It is provided with a lower cloth moving device 18 provided on the side and an auxiliary upper cloth moving device 19 for auxiliary position control of the insole cloth UW. First, it is provided between the insole cloth UW and the instep cloth DW. The cloth receiving plate driving device 16 that drives the cloth receiving plate 32 that supports both cloths UW and DW will be described with reference to FIGS. A substantially rectangular base plate 25 is fixed on the bed portion 1, and a belt-shaped linear cross bearing 26 extending in the left-right direction is attached to the front end portion of the upper surface of the base plate 25.
A cloth receiving stand 27 made of a substantially rectangular plate material is placed on 6 so as to be movable in the left-right direction.

Then, a cloth receiving tray switching cylinder 143 disposed in the left-right direction immediately in front of the cloth receiving tray 27.
Is fixed to the base plate 25 by a bracket 28, and the tip end portion of the piston rod 143a of the cylinder 143 is connected to the drive lever 29 fixed to the cloth receiving base 27. Accordingly, the cloth receiving table 27 is moved to the left by the cloth receiving table switching cylinder 143, and the left sewing position shown by the solid line in FIG. 3 and the right retracting operation shown by the chain double-dashed line by the driving to the right. The position is switched to and from.

On the other hand, on the cloth receiving table 27, a substantially inverted L is seen from the front.
The lower end of the character-shaped mounting plate 30 is fixed with a screw, and a twin rod type cloth receiving plate vertical drive cylinder 144 is mounted downward on the mounting plate 30.
4, a cloth receiving plate mounting plate 31 is fixed to the lower ends of the pair of piston rods 144a, and the lower side of the cloth receiving plate mounting plate 31 is, as shown in FIG. The base end of the cloth receiving plate 32 is fixed with screws. As shown in FIG. 7, the front end of the cloth receiving plate 32 extends leftward over the sliding plate 12 via the semicircular needle plate 11. Here, the bolt 33 (see FIG. 5) attached to the lower side of the cylinder 144 is for height adjustment for restricting the rising position of the cloth receiving plate attachment plate 31. Therefore, the cloth receiving plate 32 is moved up and down by the cloth receiving plate vertical drive cylinder 144.
5 is driven downward to drive the sewing machine to the lower sewing position shown by the solid line in FIG. 5 and driven upward to drive it to the upper retracted position shown by the chain double-dashed line. Further, as described above, the cloth receiving plate 32 is moved to the right retracted position at the same time as the cloth receiving base 27 is moved to the retracted position.

Next, the upper cloth moving device 17 is shown in FIG.
A description will be given based on FIGS. 4 and 6. The base plate 25
A strip-shaped linear cross bearing 40 extending in the left-right direction is attached to the rear side of the cloth receiving base 27 on the upper surface of the cloth receiving base 27, and a moving base 41 made of a substantially rectangular plate material is movable in the left-right direction. It has been placed. The base end portion of the moving table switching cylinder 145 arranged in the left-right direction immediately behind the moving table 41 has the base plate 2
5 is pivotally supported by a support bracket 42,
The tip end portion of the piston rod 145 a of the cylinder 145 is connected to the drive lever 43 fixed to the moving base 41. Therefore, the movable base 41 has a left sewing position shown by a solid line in FIG. 3 by driving the moving base switching cylinder 145 to the left and a right retracted position shown by a chain double-dashed line by moving it to the right. The position is switched to.

As shown in FIGS. 4 and 6, a block member 44 having an L-shape in side view is fixedly mounted on the moving base 41.
It consists of a stepping motor and the insole UW is fed in the cloth feeding direction Q.
An upper cloth moving motor 141 for moving in a direction (horizontal direction) orthogonal to is attached to the vertical wall portion 44a of the block member 44 from the rear side, and a timing pulley is attached to the drive shaft 141a of the upper cloth moving motor 141. 45 is fixed. A cylindrical bush 46 is fixed to the vertical wall portion 44a, and a cylindrical first pivotally supporting member 47 having a collar portion is fitted into the bush 46, and the front end surface of the collar portion is fixed to the timing pulley 45. The first pivot member 4 is brought into contact with the rear end face.
7 is locked out.

The first swing arm 49 made of a plate-like member, which is arranged immediately behind the flange of the first pivot member 47 and is made of a plate material, is screwed to the flange and the spacer 48 is provided.
Is in contact with the bush 46 via. The mounting portion 4 in which a part of the first swing arm 49 projects upward
A tip end portion of a piston rod 146a of an arm rotation cylinder 146 pivotally supported by a support member 50 attached to the moving base 41 is pivotally connected to the shaft 9a.
Further, the second pivotally supporting member 51, which is disposed on the front side of the timing pulley 45 and has a flange portion, is fitted onto the drive shaft 141a and is rotated by the pivotally supporting member 53 fixed to the moving base 41. Be pivoted as possible. A second belt-like member is provided immediately in front of the flange portion of the second pivot member 51 and is made of a plate-like member and is opposed to the first swing arm 49.
The swing arm 54 is screwed to the flange portion and abuts on the pivot member 53 via the spacer 52.

The first swing arm 49 and the second swing arm 54 are integrally connected by a pair of connecting members 55, and the screws 5 are attached to the tips of the first and second swing arms 49 and 54.
A timing pulley 58 is rotatably supported by a pair of pivotally supporting members 57 fixed at 6, and a timing belt 59 is stretched between the timing pulleys 45 and 58. In addition, the first and second swing arms 49 and 54
The pair of bolts 60 fixed to the block member 44 is brought into contact with the upper side and the lower side of the connecting member 55 to restrict the rotation range thereof. A pair of tension pulleys 61 for applying tension to the timing belt 59 are pivotally mounted inside the swing arms 49 and 54, as shown in FIG.

Therefore, both the timing pulleys 45 and 58 are driven by the normal cloth drive or reverse motor drive of the upper cloth moving motor 141.
The timing belt 59 is rotated in the normal direction or the reverse direction via the, and the insole cloth UW disposed below the timing belt 59 is moved leftward or rightward. Furthermore, both swing arms 49.5
4 is switched to a sewing rotation position shown by a solid line in FIG. 6 by driving the arm rotation cylinder 146 to the left and a retracting rotation position shown by a two-dot chain line by driving it to the right. . Here, both swinging arms 49 and 54 are switched to the retracted rotation position and the left sewing position, and moreover, the cloth receiving plate 32
The upper cloth DW can be placed on the upper side of the throat plate 11 when the position is switched to the upper retracted position and the left sewing position.

Next, the insole cloth U disposed on the upper surface of the needle plate 11
A separation plate drive mechanism 65 that drives the separation plate 66 for accurately performing the cloth feed of W and the cloth feed of the upper cloth DW independently of each other will be described with reference to FIGS. 4 and 8 to 10.
The separation plate 66 is plate-shaped and has a crank shape in a plan view, is located between the needle plate 11 and the cloth receiving plate 32, and has a tip portion between the lower feed dog 8 and the upper feed dog 7. In a rearward bent shape, the base end portion of which is formed one step higher, and is screwed to the left end portion of the mounting member 67. On the other hand, FIG.
・ As shown in FIG. 10, L is attached to the cloth receiving plate mounting plate 31.
The L-shaped attachment member 68 is fixed, and the L-shaped attachment member 68 is attached.
A separation plate front-rear drive cylinder 147 is attached to the cylinder, and an L-shaped attachment 69 fixed to the tip of a piston rod 147a of the cylinder 147 is screwed to the attachment member 67. That is, the separation plate 66 is connected to the piston rod 147a via the attachment member 67 and the L-shaped attachment 69.

Therefore, the separating plate 66 has a rear sewing position shown by a solid line in FIG. 8 when the separating plate front and rear drive cylinder 147 is driven rearward, and a front retracted position which is shown by a chain double-dashed line when driving forward and backward. The position is switched to. Moreover, since the separating plate 66 is attached to the cloth receiving plate mounting plate 31 via the separating plate front / rear drive cylinder 147 and the L-shaped mounting member 68, at the same time when the cloth receiving plate 32 moves to the raised retracted position. It is moved to the upper retracted position.

Next, the lower cloth moving device 18 for moving the upper cloth DW in the left-right direction will be described with reference to FIGS. 2 and 11 to 13. A lower shaft 13 (see FIG. 2) extending in the left-right direction is arranged in the bed portion 1.
A rotary hook 75 is connected to the left end of the rotary hook 75, and a bobbin case 76 is housed in the rotary hook 75. An oil pan 77 is arranged below the work table T so as to cover the rotary hook 75. A plate-shaped support frame 78 extending downward is attached to the lower side of the oil pan 77,
A rodless type lower cloth driving cylinder 148, which is a magnet type rodless type driving cylinder for driving the lower cloth moving mechanism 80 up and down, is attached to the support frame 78 with its upper end portion tilted to the right. . Therefore, the lower cloth moving mechanism 8
The position 0 is switched between the upper sewing position shown by the solid line in FIG. 11 by the upward drive of the lower cloth drive cylinder 148 and the lower retracted position shown by the two-dot chain line by the downward drive.

Next, the lower cloth moving mechanism 80 connected to the movable portion 148a of the lower cloth driving cylinder 148 will be described. A lower cloth moving motor 142, which is a stepping motor for moving the upper cloth DW in the left-right direction, is fixed to the movable portion 148a, and a lower end portion of the support plate 81 having a substantially trapezoidal shape in a front view is screwed. ing. Further, a spacer 82 is provided on the upper end portion of the support plate 81.
The lower end portion of the support lever 83 is connected via the support lever 83, and a pair of pivot support members 85 and 86 are screwed to the upper end portion of the support lever 83 via a spacer 84. A partially tapered lower cloth feed roller 87 is rotatably supported by a pin 88 at the upper end of 86.

Then, the lower cloth feed roller 87 and the pulley 8 fixed to the drive shaft 142a of the lower cloth moving motor 142.
A timing belt 90 is stretched between 9 and the belt. Accordingly, the lower cloth feed roller 87 is normally or reversely rotated through the pulley 89 and the timing belt 90 by the normal rotation driving or the reverse rotation driving of the lower cloth moving motor 142, and the upper cloth arranged above the timing belt 90 is covered. The DW is moved to the left or right. Here, as shown in FIG. 13, when the lower cloth moving mechanism 80 is switched to the upper sewing position,
The lower cloth feed roller 87 ascends until it is exposed immediately below the cloth receiving plate 32 through the rectangular notch 11a formed in the sliding plate 11, so that the bobbin take-out port 77a formed in the oil pan 77 is It is covered with this lower cloth moving mechanism 80. However, when the lower cloth moving mechanism 80 is switched to the lower retracted position, the lower cloth feed roller 87 descends to the lower side of the oil pan 77, and in this state, the operator takes the bobbin take-out port. The bobbin case 76 can be taken out via 77a.

Next, an upper cloth edge detecting mechanism (corresponding to the upper cloth edge detecting means of the present invention) 9 for detecting the cloth edge position of the insole cloth UW 9
5 will be described with reference to FIGS. 8 to 10, 17, and 18. On the upper side of the cloth receiving plate 32 corresponding to the needle plate 11, a sensor mounting block 96 having a substantially rectangular shape in a plan view is arranged and screwed to the cloth receiving plate 32. Then, in the left end portion of the sensor mounting block 96, as shown in FIGS. 17 and 18, a sensor accommodating portion 96a is formed by cutting out a lower half portion thereof for setting the insole cloth UW. An upper cloth edge detection sensor 97 made of a prism is housed in the housing portion 96a so that its lower portion faces the lower side of the sensor housing portion 96a. That is, the upper cloth edge detecting sensor 97 is provided on the upstream side of the sewing needle 4 in the cloth feeding direction Q.

As shown in FIG. 18, the upper cloth edge detecting sensor 97 is a first prism which is a right angle prism having an apex angle of 90 °.
It is configured by a combination of the prism 98 and the second prism 99, and one end surface of the first prism 98 and the second prism 99.
And the second prism 99 is arranged orthogonal to the cloth edge. Then, the first prism 9
No. 8 has a fiber diameter of about 0.
The front end surfaces of the upper fabric fiber group FA consisting of 10 optical fibers A1 to A10 of 5 mm are connected in a row. Further, at the base end portions of the optical fibers A1 to A10, ten light emitting devices OSU1 to OSU10 each including a light emitting diode are provided in association with each other through the half mirrors HM1 to HM10, and ten light emitting transistors and the like are provided. Light receiving elements ISU1 to ISU10 are provided.

Therefore, each of the detection light such as the laser light projected from each of the light emitting elements OSU1 to OSU10 passes through the half mirrors HM1 to HM10 and the optical fibers A1 to A1.
After passing through A10, it is incident on the first prism 98, is totally reflected at a right angle to the second prism 99 side, is further totally reflected at a right angle to the lower side at the second prism 99, and is located at the lower side from the second prism 99. It is projected from a direction substantially orthogonal to the cloth UW or the cloth receiving plate 32. Then, the reflected light reflected by the insole cloth UW or the cloth receiving plate 32 is reflected by the second prism 99 and the first prism 9.
8 are totally reflected respectively, and are reflected by half mirrors HM1 to HM10 through the same optical fibers A1 to A10 as at the time of projection, and the reflected lights are respectively received by the light receiving elements ISU1 to ISU10. That is, the detection light is projected through the prisms 98 and 99 from the tip end side of the ten optical fibers A1 to A10 in a dot row crossing the cloth edge of the insole cloth UW, and from the reflected light, the insole cloth UW is projected. The cloth edge position of can be detected. Here, the amount of light received by the light receiving elements ISU1 to ISU10 is larger than the amount of light received when reflected by the insole cloth UW, that is, the amount of light received when reflected by the cloth receiving plate 32.

Next, the lower cloth edge detecting mechanism (corresponding to the lower cloth edge detecting means) 100 for detecting the cloth edge position of the upper cloth DW will be described with reference to FIGS. 4, 7, 14, 15 and 17. It will be described with reference to FIG. The sensor support plate 10 is provided on the base plate 25 corresponding to the lower side of the upper cloth moving motor 141.
1 is fixed, and a connecting plate 102 is attached to the lower side of the left end portion of the sensor support plate 101. Also, the needle plate 1
1, a notch 11b having a substantially U-shape in plan view is formed, and a sensor mounting block 103 having a substantially crank shape in plan view and a side view is fixed to a front end portion of the connecting plate 102. The stepped portion of 103 is located in the notch 11b.

A lower cloth edge detecting sensor 104 made of a prism is accommodated in a sensor accommodating portion 103a which is long in the left-right direction at the front end portion of the sensor mounting block 103 so that its upper portion faces the upper side of the sensor accommodating portion 103a. There is. That is, the lower cloth end detection sensor 104 is provided substantially opposite to the upper cloth end detection sensor 97 and upstream of the sewing needle 4 in the cloth feeding direction Q. This lower cloth edge detection sensor 104
As shown in FIG. 19, is composed of a combination of a first prism 105 and a second prism 106, which are right-angle prisms having an apex angle of 90 °, and one end face of the first prism 105 and the second prism 106 are One end face is pasted together,
The second prisms 106 are arranged orthogonally to the cloth edge.
Then, on the right end surface (light ray input surface) of the first prism 105, the front end surfaces of the lower cloth fiber group FB composed of ten optical fibers B1 to B10 each having a fiber diameter of about 0.5 mm are arranged in a row. It is connected. Further, the half mirrors HM11 to H are attached to the base ends of the optical fibers B1 to B10.
10 light emitting elements OSD1 to OSD10 including light emitting diodes are provided in association with each other via M20, and
10 photo detectors ISD1 consisting of phototransistors
~ ISD10 is provided.

Therefore, each of the detection light such as the laser light projected from each of the light emitting elements OSD1 to OSD10 passes through the half mirrors HM11 to HM20 and the optical fibers B1 to B1.
The light then enters the first prism 105 via 10 and is totally reflected at a right angle to the second prism 106 side.
Is reflected by the second prism 106 at a right angle, and is projected from the second prism 106 in a direction substantially orthogonal to the upper instep DW or the cloth receiving plate 32. Then, the reflected light reflected by the upper cloth DW or the cloth receiving plate 32 is totally reflected by the second prism 106 and the first prism 105 respectively, and passes through the same optical fibers B1 to B10 as at the time of projection and the half mirrors HM11 to HM.
The reflected light is reflected at 20, and the reflected light is received by each of the light receiving elements ISD1 to ISD10. That is, the detection light is projected through the prisms 105 and 106 from the tip ends of the ten optical fibers B1 to B10 in a dot array crossing the cloth end of the instep cloth DW,
The cloth edge position of the instep cloth DW can be detected from the reflected light. Here, the amount of light received by the light receiving elements ISD1 to ISD10 is larger when the light is reflected by the cloth receiving plate 32 than when it is reflected by the upper cloth DW.

By the way, as shown in FIG. 7, FIG. 14 and FIG. 15, the cloth end positions of the insole cloth UW and the upper cloth DW are regulated to the right of the needle hole 11c formed in the needle plate 11, respectively. A restriction wheel 110 for controlling the
A base end portion is fixed to the connecting plate 102, and is rotatably attached to a front end portion of a holding member 111 extending leftward. Next, the auxiliary upper cloth moving device 19 will be described with reference to FIGS. A pivot member 115 is erected on the left end of the work table T, and a rotary plate 116 is pivotally supported on the pivot member 115 by a bolt 117. Further, an upper end of the rotary plate 116 is provided. A twin rod type auxiliary upper cloth support cylinder 149 is attached to the portion in a state of descending to the right.

The cylinder mounting member 1 is attached to the tip of the piston rod 149a of the auxiliary upper cloth support cylinder 149.
18 is attached, and an auxiliary upper cloth pressing cylinder 150 is attached to the cylinder attaching member 118 to the right.
Further, an L-shaped auxiliary cloth receiving member 119 is attached to the tip of the piston rod 150a of the auxiliary upper cloth pressing cylinder 150. Therefore, as shown in FIG. 16, the auxiliary cloth receiving member 119 is the same as the auxiliary upper cloth supporting cylinder 1.
16 is indicated by a two-dot chain line in FIG. 16 when the auxiliary upper cloth support cylinder 149 is driven in and out by a rightward sewing position shown by a solid line in FIG. The position is switched to the left retracted position (shown). Further, when the auxiliary cloth receiving member 119 is switched to the right sewing position and the swing arms 49 and 54 are switched to the retracted rotation positions, the auxiliary upper cloth pressing cylinder 150 is driven to advance. At times, the timing belt 59 and the right end portion of the auxiliary cloth receiving member 119 can supplementarily support the insole cloth UW arranged in the vertical direction. Here, the bolt support member 1 screwed to the pivot member 115
The bolt 121 screwed to 20 is for adjusting the inclination of the auxiliary upper cloth support cylinder 149.

Next, the control system of the sewing machine SM is constructed as shown in the block diagram of FIG. The input / output interface 185 of the control device C includes a program switch 130, a program correction switch 131, a sewing preparation switch 132, a sewing start switch 133, an operation switch 134, and a release switch 13 provided on the operation panel 10.
5, a numeric keypad 136, a set switch 137, and a needle position signal generator 138 for detecting the rotation phase of the sewing machine main shaft provided in the arm section 3 and outputting a needle position signal corresponding to the moving position of the needle bar. It is connected.

Further, the input / output interface 185 includes a drive circuit 170 for the sewing machine motor 140, a drive circuit 171 for the upper cloth moving motor 141, a drive circuit 172 for the lower cloth moving motor 142, and a cloth receiver. A drive circuit 173 for the electromagnetic switching valve 151 that drives the base switching cylinder 143, a drive circuit 174 for the electromagnetic switching valve 152 that drives the cloth receiving plate vertical drive cylinder 144, and an electromagnetic switching valve that drives the moving base switching cylinder 145. Drive circuit 175 for 153, drive circuit 176 for electromagnetic switching valve 154 that drives arm rotation cylinder 146, drive circuit 177 for electromagnetic switching valve 155 that drives separator plate front-back drive cylinder 147, bottom cloth drive Circuit 178 for the electromagnetic switching valve 156 for driving the cylinder 148, auxiliary upper cloth support cylinder 14 Drive circuit 179 for the electromagnetic switching valve 157 that drives the actuator, drive circuit 180 for the electromagnetic switching valve 158 that drives the auxiliary upper cloth pressing cylinder 150, drive circuit 181 for the presser foot driving solenoid 159, and upper feed dog. A drive circuit 182 for the motor 160 and a drive circuit 183 for the linear solenoid 161 are connected to each other.

The control device C is a controller 165 for the upper cloth.
And the lower cloth controller 166 and the main CPU 187
And a bus 1 such as a data bus to the main CPU 187
I / O interface 18 connected via 86
5, ROM 188 and RAM 189. The upper cloth controller 165 is for performing cloth edge position detection control of the insole cloth UW, is connected to the input / output interface 185, and is a light emitting element OSU1 to OSU10 for detecting the cloth edge of the insole cloth UW. And light receiving elements ISU1 to ISU10
Are connected. In addition, the controller for lower cloth 166
Is for controlling the cloth edge position detection and notch detection of the instep cloth DW.
In addition, the light emitting elements OSD1 to OSD10 and the light receiving elements ISD1 to ISD10 for detecting the cloth edge of the instep covering DW are connected. The ROM 188 includes various switches 130 to 13
7, a drive control program for driving the motors 140 to 142 and the electromagnetic switching valves 151 to 158 in accordance with the operation of 7, and a control program for the later-described cloth edge alignment / bare stitch sewing control peculiar to the present invention are stored. The RAM 189 contains C
Various memories such as a buffer, a counter, and a pointer for temporarily storing the calculation result calculated by the PU 187 are provided.

Next, the routine of the cloth edge aligning and shirring sewing control performed by the controller C of the sewing machine SM will be described.
Description will be made based on the flowcharts of FIGS. 21 to 26.
In the figure, reference numeral Si (i = 10, 11, 12, ...) Indicates each step. When the sewing machine SM is powered on, this control is started, and first, each memory of the RAM 189 is cleared and each electromagnetic switching valve 151 to 158.
Are driven to switch the cylinders 143-150 to the retracted positions in a predetermined order. Further, since the presser foot driving solenoid 159 is driven, a series of initial setting processing such as moving the presser bar and the upper feed dog 7 to the raised retracted position is executed (S10). That is, as a result of the execution of this initialization process, the upper cloth DW and the insole cloth UW can be placed on the throat plate 11.

Next, when the program switch 130 of the operation panel 10 is operated (S11 / S12: Ye
s), the sewing parameter setting processing control (see FIG. 22) regarding the insole cloth UW and the upper cloth DW to be sewn is executed (S13). When this control is started, firstly the numeric keypad 1
By operating 36, a desired program number is input and set (S25), and the number D of sewing sections from the sewing start position to the sewing end position is input and set for the insole bottom UW (S26). Here, the sewing section refers to a sewing section having the same curvature radius in the cloth end shape of the insole cloth UW. For example, as shown in FIG. 27, in the cloth edge shape from the sewing start position to the sewing end position of the insole cloth UW, the sewing ranges having the same radius of curvature are sequentially sewn in the sewing section 1,
The sewing section 2, the sewing section 3, ... Are set, and the number of sewing sections D is input by operating the ten keys 136.

Next, the initial value "1" is set as the counter value Dn of the sewing section counter provided in the RAM 189 (S27), and the number of stitches Pn to be sewn and the cloth edge position at that time are set for this sewing section Dn. The reference optical fiber number As of the corresponding upper cloth fiber group FA is input, and the number of stitches Pn and the reference optical fiber number As are associated with the sewing section Dn by the operation of the set key 137, and the RAM 189.
Is stored in the work memory (S28). Next, the sewing section count value Dn is incremented by 1 (S2
9) When the counter value Dn is less than or equal to the number of sewing sections D (S30: No), S28 to S30 are repeated.

When the counter value Dn becomes larger than the number of sewing sections D (S30: Yes), the set number of sewing sections E of the upper cloth DW is set for the upper cloth DW as in the case of the insole cloth UW. For each of the above, the number of stitches Pn to be sewn and the reference optical fiber number Bs of the lower fabric fiber group FB corresponding to the cloth end position at that time are respectively input, and each time the set key 137 is operated, the number of stitches Pn is inputted.
And the reference optical fiber number Bs are stored in the work memory of the RAM 189 in association with the sewing section En (S31).
~ S35). The number of stitches P for all sewing sections E
n and the reference optical fiber number Bs are set (S3
5: Yes), then, regarding the instep cloth DW, the notch number and the shirring section are input in correspondence with the sewing section En (S36), and the shirring ratio α to the feed amount of the insole bottom UW is the notch number. Is input in correspondence with (S37),
This control is ended, and the process returns to S11 of the cloth edge aligning / bare stitching control shown in FIG.

Therefore, in the table memory of the RAM 189, for example, as shown in FIG. 29, with respect to the insole bottom UW, for each sewing section Dn, the reference optical fiber number As corresponding to the reference cloth end position and the number of stitches Pn are stored. The upper cloth parameter table PTU associated with is stored. Similarly, for the instep cloth DW shown in FIG. 28, as shown in FIG. 30, for each sewing section En, the notch number, the shirring section, the shirring ratio α, and the reference corresponding to the reference cloth edge position. The lower cloth parameter table PTD in which the optical fiber number Bs and the number of needles Pn are associated is stored. In addition, in the instep covering DW shown in FIG. 28, the shirring is executed over the first notch sewing section to the third notch sewing section.
Here, the squeezing means that one work cloth (instep cloth DW) is fed more than the other (middle sole cloth UW) to give a fine gather to one work cloth. By these sewn-in stitches, these two work cloths can be sewn in three dimensions.

Next, when the program correction switch is operated (S11: Yes, S12: No, S14:
Yes), the number of the program to be modified is the numeric keypad 136
Is input (S15), and a correction process for sequentially correcting the reference optical fiber numbers As and Bs corresponding to the number of stitches Pn and the cloth edge position is executed for the content of the program number (S16), and the process returns to S11. .

Next, when the sewing preparation switch 132 is operated (S11: Yes, S12 / S14: No,
(S17: Yes), the sewing preparation processing control (see FIG. 23) is executed (S18). When this control is started and first the operation switch 134 is operated (S40 / S41:
Yes), based on the flag data of the flag memory provided in the RAM 189, when the first operation flag 1MF is not set, that is, when each of the cylinders 143-150 is driven to the retracted position (S42: N).
o) First, the cloth receiving table switching cylinder 143 is driven to advance (S43), the moving table switching cylinder 145 is further driven to advance (S44), the first operation flag 1MF is set (S45), and the process returns to S40. Therefore, the swinging arms 49 and 54 are switched to the left sewing position while being held at the retracted rotation position, and the position is switched to the left sewing position when the cloth receiving plate 32 is held at the upper retracted position. . At this time, as shown in FIG. 9, the cloth end position of the upper cloth DW is brought into contact with the restricting wheel 110 from the left side, and the sewing start position is matched with the needle drop position, so that the upper cloth DW is attached to the needle plate 11. It is set on the upper side and on the lower side of the cloth receiving plate 32.

Next, when the operation switch 134 is operated again (S40 / S41: Yes), the first operation flag 1MF is set (S42: Yes), but the second operation flag is set.
If the operation flag 2MF is reset (S4
6: No), first the cloth receiving plate vertical drive cylinder 144 is driven to advance (S47), and then the separation plate longitudinal drive cylinder 1
47 is driven to advance (S48). Further, the lower cloth drive cylinder 148 is driven to advance (S49), the second operation flag 2MF is set (S50), and the process returns to S40.
Therefore, with the cloth receiving plate 32 held in the left sewing position, the lower sewing position is switched to, the separating plate 66 is switched to the rear sewing position, and the lower cloth moving mechanism 80 is switched to the upper sewing position. The upper cloth DW is pressed and held by the cloth receiving plate 32 by the upper end of the belt 90 and the lower cloth feed roller 87.

At this time, as shown in FIG. 9, while the cloth end of the insole cloth UW is brought into contact with the regulating wheel 110 from the left side, the cloth end is made to coincide with the cloth end of the upper cloth DW and The sewing start position is set at the needle drop position and set on the upper side of the cloth receiving plate 32. After that, when the operation switch 134 is operated again (S40 / S41: Yes), the first operation flag 1MF and the second operation flag 2MF are set (S42 / S46: Yes), but the third operation flag is set. If 3MF is not set (S55: N
o), the arm rotation cylinder 146 is driven to advance (S
56), the third operation flag 3MF is set (S5
7) and returns to S40. Therefore, both swing arms 49
54 is switched to the sewing rotation position, and the timing belt 5
The insole cloth UW is pressed and held by the cloth receiving plate 32 at the lower end of 9.

Further, when the operation switch 134 is operated again (S40 / S41: Yes), when the first, second and third operation flags 1MF, 2MF and 3MF are set respectively (S42. S46 / S55: Yes),
The drive of the presser foot driving solenoid 150 is stopped (S5
8) The positions of the presser foot 6 and the upper feed dog 7 are switched to the presser position, the control is terminated, and the process returns to S11 of the cloth edge aligning / bare stitch sewing control shown in FIG. However, when the release switch 135 is operated before driving of the presser foot driving solenoid 150 is stopped (S40: Ye
s, S41: No, S51: Yes), and when the second operation flag 2MF or the third operation flag 3MF is set (S52: Yes), the cylinder 144, which is driven to advance other than the cylinders 143 and 145, is driven. 146-14
All 8 are sequentially driven in and out in a predetermined order (S53),
Both operation flags 2MF and 3MF are reset respectively (S5
4) and returns to S40. As a result, it is possible to reset from the instep cloth DW.

Next, when the sewing start switch 133 is operated (S11: Yes, S12, S14, S1).
7: No, S19: Yes), and the sewing process control (see FIG. 24) is executed (S20). When this control is started, first, the count value p for counting the number of stitches P and the notch count value q for counting the number of notches are reset (S60), and the sewing machine motor 140 is driven (S60).
61). Therefore, since the cloth feed operation is executed so that the upper feed dog 7 and the lower feed dog 8 have the preset cloth feed amount, the cloth end justification sewing of the middle bottom cloth UW and the upper cloth DW is started. It

Next, the shirring ratio α corresponding to the current sewing position is read based on the notch count value q and the lower cloth parameter table PTD (S62), and the linear solenoid 161 is based on this shirring ratio α. Is driven (S63). The drive amount at this time is the upper feed dog motor 1
The lower feed amount is calculated by multiplying the upper feed amount obtained from the rotation amount of 60 by the shirring ratio α, and is determined corresponding to the lower feed amount. As a result, this linear solenoid 161
The inclination of the feed controller connected to is changed, and the lower feed dog 8 is driven back and forth by the feed amount according to the inclination of the feed controller. That is, the feed amount of the upper cloth DW becomes larger than the feed amount of the insole cloth UW based on the shirring ratio α. However, the upper feed dog 7 is fed by a preset feed amount. Next, based on the needle position signal from the needle position signal generator 138, at the cloth feed start timing (S64: Y
es), the upper cloth controller 165 and the lower cloth controller 166 are instructed to execute the cloth edge position / notch detection processing control (S65).

Next, based on the stitch count value p and the upper cloth parameter table PTU and the lower cloth parameter table PTD, the current sewing position, that is, the current sewing section number D.
n · En are respectively obtained (S66), the reference optical fiber number As corresponding to the sewing section number Dn is read from the upper cloth parameter table PTU, and the lower cloth parameter table PTD corresponds to the sewing section number En. The reference optical fiber number Bs is read (S6
7) The standby state is continued until the cloth edge position / notch detection processing by both controllers 165 and 166 is completed (S68: No).

Here, the routine of the cloth edge position / notch detection control of the inner bottom cloth UW executed by the upper cloth controller 165 based on the execution command of the cloth edge position / notch detection processing control is shown in FIG. A description will be given based on the flowchart. When this control is started, first, the count value s of the detection cycle counter and the initial value "1" are set as the count value f of the optical fiber counter (S85),
The light emitting device OSUn for the upper cloth, which is indicated by the optical fiber count value f, is turned on (S86). As a result, as described above, the detection light projected from the light emitting element OSUn passes through the optical fiber An corresponding to the light emitting element OSUn, passes through the first prism 98 and the second prism 99, and the insole cloth UW or cloth. The light is reflected by the receiving plate 32, passes through the same optical fiber An, is reflected by the half mirror HMn, and is received by the light receiving element ISUn corresponding to the light emitting element OSUn. Then, the light reception value r (digital value) based on the amount of light received by the upper cloth light receiving element ISUn indicated by the optical fiber count value f is obtained (S87).

Next, when the received light value r is larger than the predetermined threshold value K (S88: Yes), there is no insole cloth UW corresponding to the optical fiber An, and the optical fiber count value f is set. The fiber flag FF [f] as a parameter is set (S89). On the other hand, when the received light value r is less than or equal to the threshold value K (S8
8: No), corresponding to this optical fiber An, insole cloth U
W is present, and the fiber flag FF [f]
Are reset (S90).

Next, the light emitting device OSUn for the upper cloth indicated by the optical fiber count value f is turned off (S91), the count value f is incremented by 1 (S92), and the count value f is the optical fiber of the upper cloth fiber group FA. When the number is A or less (S93: No), S86 to S93 are repeated. Then, with respect to all the optical fibers An, detection light in the form of dot rows intersecting with the cloth edge of the insole cloth UW is sequentially projected, and when the received light values r thereof are obtained (S9).
3: Yes), based on the flag data of the A fiber flags FF [f] corresponding to the number A of optical fibers, the optical fiber number Ax corresponding to the temporary cloth edge position of the insole cloth UW is obtained and stored ( S94).

For example, as shown in FIG. 31, when the detection cycle count value s is "1", the fiber flag FF [f] is set or reset for each of the optical fiber count values f. The optical fiber number A4 when the flag data changes from "1" to "0" is stored in the temporary cloth edge position memory of the RAM 189 as corresponding to the temporary cloth edge position. Next, when it is within the cloth feed period (S95: No), the detection cycle count value s
And the optical fiber count value f are incremented by one (S96), and S86 to S96 are continuously repeated during the cloth feeding period. Then, at the cloth feed end timing (S95: Yes), a cloth edge position change pattern table based on the plurality of temporary cloth edge position optical fiber numbers Ax is created in the pattern memory of the RAM 189, and fuzzy using this cloth edge position change pattern. By inference, the presence or absence of the notch H and the optical fiber number Am corresponding to the cloth edge position are finally determined (S97), and the main CPU 18
The presence / absence of the notch H and the determined optical fiber number Am are output to the controller 7, and the end of the cloth edge position / notch detection process is instructed (S98), and this control is ended.

The fuzzy inference will be explained here. When the cloth end shape of the insole cloth UW is a smooth curve in the cloth feed period of the feed pitch t as shown in FIG. 35, the cloth of FIG. As shown in the end position change pattern, a plurality of detection cycle count values s (s = 1, 2, 3, ...
The plurality of temporary cloth end position optical fiber numbers Ax corresponding to each of () do not change suddenly. However, when the cloth end portion has the notch H in the cloth feed period of the feed pitch t as shown in FIG. 36, as shown in the cloth end position change pattern of FIG.
A plurality of temporary cloth end position optical fiber numbers A corresponding to
x decreases sharply and recovers sharply. Further, as shown in FIG. 37, when the cloth edge portion has a fluff I in the cloth feed period of the feed pitch t, as shown in the cloth edge position change pattern of FIG. 34, a plurality of detection cycle count values s A plurality of temporary cloth edge position optical fiber numbers Ax corresponding to each
Rapidly increases and then recovers rapidly.

Therefore, the antecedent part is the reference optical fiber number A.
Based on each of a plurality of pre-determined rules for setting the deviation amount of the temporary cloth end position optical fiber number Ax with respect to s and setting the consequent part as the change state of the temporary cloth end position optical fiber number Ax, The degree of matching is determined, and the center of gravity obtained by superimposing these multiple degrees of soft matching is used to finally determine whether the cloth edge is a smooth curve, has a notch H, or has a fluff I. Is. However, if there is a notch H or a fluff I at the cloth end during the cloth feeding period, the temporary cloth end position optical fiber number A immediately before the notch H or the fluff I
Let x be the optical fiber number Am corresponding to the cloth edge position.

Next, the routine of the cloth edge position / notch detection control of the upper cloth DW executed by the lower cloth controller 166 based on the cloth edge position / notch detection processing control execution command will be described with reference to the flowchart of FIG. This control is similar to the control content executed by the upper cloth controller 165, and therefore will be briefly described. First, the detection cycle count value s and the initial value "1" are set as the optical fiber count value f (S100), and during the cloth feed period, for each detection cycle count value s,
Light emitting device for the upper cloth which is indicated by the optical fiber count value f
OSUn is lit and the light receiving element corresponding to this light emitting element OSUn
The reflected light is received by ISUn, the fiber flag FF [f] is set or reset according to the magnitude of the received light value r, and the temporary cloth end position optical fiber number Bx is set based on the data of these plural fiber flags FF [f]. Is required (S101 to S111). Then, based on the plurality of temporary cloth end position optical fiber numbers Bx, the above-described fuzzy inference is performed to finally determine the presence or absence of the notch H and the optical fiber number Bm corresponding to the cloth end position (S112), and the main CPU 187. On the other hand, the presence / absence of the notch H and the determined optical fiber number Bm are output, while commanding the completion of the cloth edge position / notch detection processing (S113), and this control is ended.

Next, in the sewing process control, when a command to complete the cloth edge position / notch detection process is received from both controllers 165 and 166 (S68: Yes),
First, regarding the insole cloth UW, the reference optical fiber number As
And the deviation amount of the cloth end position with respect to the reference optical fiber number As is calculated based on the inputted cloth end optical fiber number Am and the diameter of the optical fiber, and the deviation direction is obtained (S69). The upper cloth moving motor 141 is driven based on the deviation direction (S70).
As a result, even if the radius of curvature of the cloth end shape of the insole cloth UW changes, the sewing section Dn is changed every time the sewing section Dn is changed.
Since the deviation amount of the cloth edge position with respect to the reference optical fiber number As of is obtained, the predetermined seam allowance can always be reliably retained for the insole cloth UW.

Next, regarding the instep cloth DW, the reference optical fiber number Bs and the inputted cloth end optical fiber number Bm
And the deviation amount of the cloth edge position with respect to the reference optical fiber number Bs are calculated based on the above and the diameter of the optical fiber, and the deviation direction is obtained (S71). Based on this deviation amount and the deviation direction, the lower cloth is moved. The driving motor 142 is driven (S72). As a result, even if the radius of curvature of the cloth end shape of the upper cloth DW changes, the deviation amount of the cloth end position with respect to the reference optical fiber number Bs of the sewing section En is calculated every time the sewing section En is changed. With respect to the instep cover DW, a predetermined seam allowance can always be reliably retained.

Next, when the notch H is detected in the notch detection processing control (S73: Yes), the notch count value q and the stitch number count value p are incremented by one (S74 and S75). But notch H
Is not detected (S73: No), only the stitch count value p is incremented by 1 (S7).
5). Then, based on the stitch count value p and both parameter tables PTU and PTD, when the sewing process is not finished (S76: No), S62 to S76 are repeatedly executed, and when the sewing is finished (S76: Ye).
s), at the timing of reaching the needle up position, the driving of the sewing machine motor 140 is stopped (S77), the presser foot driving solenoid 159 is driven (S78), and all the cylinders 143 to 148 are sequentially operated in a predetermined order. Retreat drive (S7
9) Then, this control is ended, and the process returns to S11 of the cloth edge aligning / bare stitch sewing control shown in FIG. As a result, the cloth receiving plate 32, the separating plate 66, the two swinging arms 49, 54, etc. are switched to the retracted positions, respectively, so that it is possible to take out the athletic shoe US that has been sewn and integrated. For example, as shown in FIG. 38, athletic shoes US are obtained by overlapping and sewing the toe portions of the insole cloth UW and the instep cloth DW.

As described above, the insole cloth UW is fed by a predetermined cloth feed amount, and the cloth edge position is displaced so that the cloth edge position becomes the reference position corresponding to the reference optical fiber number As. And the upper cloth DW is fed by a cloth feeding amount larger than the cloth feeding amount of the insole cloth UW corresponding to the current sewing section, and the cloth end position corresponds to the reference optical fiber number Bs. Since the deviation of the cloth edge position is eliminated so that it becomes the reference position, both processed cloths UW ・ D
It is possible to automate the overlapped stitching in which the cloth upper DW is bulged while matching the cloth ends of W.
As a result, neither a high level of skill is required nor a muscle pain is bothered in the overlapping stitching work. Further, both work cloths UW and DW are sequentially changed and set with reference positions corresponding to the current sewing section according to the progress of the sewing process, and the deviation of the cloth end position is eliminated based on the changed and set reference positions. Since it is moved like this, even if the cloth edge shape is a complicated shape including a plurality of types of curves and straight lines with different radii of curvature, it is possible to always ensure a predetermined sewing allowance and perform good-looking copy stitching. be able to.

Here, the correspondence between each means described in the claims and the configuration in the above embodiment will be described. The upper feed means corresponds to the upper feed tooth 7 and the front and rear of this feed tooth. The drive mechanism and the feed dog up-and-down drive mechanism, which correspond to the lower feed means, are the lower feed tooth 8, the feed tooth front-rear drive mechanism, and the feed tooth up-down drive mechanism. An upper cloth moving device 17 corresponds to the upper work cloth moving means, and a lower cloth moving device 1 corresponds to the lower work cloth moving means.
8 Further, what corresponds to the upper cloth edge detecting means is the upper cloth fiber group FA, the first prism 98, the second prism 99, the upper cloth light emitting elements OSU1 to OSU10, and the upper cloth light receiving element IS.
The upper cloth edge detecting mechanism 95 including U1 to ISU10, which corresponds to the lower cloth edge detecting means, includes the lower cloth fiber group FB, the first prism 105, the second prism 106, and the lower cloth light emitting elements OSD1 to OSD10. , A lower cloth edge detecting mechanism including the lower cloth light receiving elements ISD1 to ISD10. And, the one corresponding to the feeding storage means is an R which stores the lower cloth parameter table PTD.
The table memory of the AM 189, which corresponds to the sewing position detecting means, is the control device C, the number of stitches counter, the parameter table and S66 of the sewing processing control program, and the one corresponding to the first controlling means is the control. Device C,
It is S63 of the sewing processing control program, and what corresponds to the second control means is the control device C and S69 to S72 of the sewing processing control program.

In the upper cloth parameter table PTU and the lower cloth parameter table PTD, the reference optical fiber numbers As and Bs at the needle drop positions are stored in association with each other for each number of stitches from the start of sewing. Alternatively, the data of the shirring ratio α may be stored for each sewing section. In this case, the seam allowance and the shirred amount can be held more accurately. Further, as the upper cloth moving device 17, the upper feed dog 7 may be configured to be movable in a direction orthogonal to the cloth feeding direction Q, and as the lower cloth moving device 18, the lower feed dog 8 may be moved in the cloth feeding direction Q. It may be configured to be movable in the orthogonal direction. And
The number of optical fibers provided in the upper fabric fiber group FA and the lower fabric fiber group FB is not limited to 10, and the fiber diameter may be changed to configure an arbitrary number. In the above embodiment, in order to change the feed amount of the upper and lower work cloths, the cloth feed ratio of the feed amount of the lower work cloth to the feed amount of the upper work cloth is instructed. The value itself may be used for the instruction.

[0065]

As described in detail above, according to the sewing apparatus of the first aspect, the upper and lower feed means, the upper and lower work cloth moving means, the upper and lower cloth end detecting means, the feed storing means, and the sewing machine. Position detecting means, first control means and second control means are provided,
For both upper and lower work cloths, the deviation of the cloth end position is eliminated so that the cloth end position becomes the reference position, and one of the work cloths is fed relative to the other work cloth at the current sewing position. Since the cloth is fed according to the value related to, it is possible to automate the overlapped stitching in which the cloth ends of the upper and lower work cloths are matched with each other and the work cloth of one of them is pushed in. As a result, neither a high level of skill is required nor a muscle pain is bothered in the overlapping stitching work. Furthermore, for both upper and lower work cloths, the reference position corresponding to the current sewing position according to the progress of the sewing process is sequentially changed and set, and the deviation of the cloth end position is eliminated based on the changed reference position. Since it is moved, even if the cloth edge shape is a complicated shape including multiple types of curves and straight lines with different radii of curvature, it is possible to always secure a predetermined sewing allowance.
You can make good looking stitches.

When the feed storage means stores the data of the feed ratio of the feed amount of the lower work cloth to the feed amount of the upper work cloth as the data related to the relative feed (claim 2), Data related to relative feeding can be simplified.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing a configuration of the present invention.

FIG. 2 is a front view of the sewing device.

FIG. 3 is a plan view of a cloth edge control device.

FIG. 4 is an enlarged view of a main part, which corresponds to FIG.

FIG. 5 is a vertical sectional front view of a main part.

FIG. 6 is a partial vertical sectional front view showing an upper cloth moving device.

FIG. 7 is a partial enlarged plan view of a main part showing a lower cloth edge detection sensor.

FIG. 8 is a partial enlarged plan view of an essential part showing the upper cloth edge detection sensor.

FIG. 9 is an enlarged plan view of the main part where the insole cloth and the instep cloth are set at the sewing position.

FIG. 10 is a vertical cross-sectional side view taken along the line LL in FIG.

FIG. 11 is a partially enlarged front view showing the lower cloth moving device.

FIG. 12 is an enlarged side view of the lower cloth moving device.

FIG. 13 is a partially enlarged perspective view of a lower cloth moving device and an oil pan.

FIG. 14 is a vertical cross-sectional front view taken along line G-G of FIG.

FIG. 15 is a vertical cross-sectional front view taken along the line JJ of FIG.

FIG. 16 is an enlarged front view of the auxiliary upper cloth moving device.

FIG. 17 is a mechanism diagram of the cloth edge control device.

FIG. 18 is a configuration diagram of an upper cloth edge detection mechanism.

FIG. 19 is a configuration diagram of a lower cloth edge detection mechanism.

FIG. 20 is a block diagram of a control system of the sewing device.

FIG. 21 is a schematic flowchart of a routine of cloth edge alignment / bare stitching control.

FIG. 22 is a schematic flowchart of a routine for controlling parameter setting processing for sewing.

FIG. 23 is a schematic flowchart of a sewing preparation process control routine.

FIG. 24 is a schematic flowchart of a sewing processing control routine.

FIG. 25 is a schematic flow chart of cloth bottom position / notch detection processing control of the insole cloth.

FIG. 26 is a schematic flowchart of upper cloth end position / notch detection processing control.

FIG. 27 is a partial plan view of the insole cloth for explaining the sewing section of the insole cloth.

FIG. 28 is a partial plan view of the instep covering for explaining the sewing section of the instep covering.

FIG. 29 is a table for explaining the data structure of a top cloth parameter table.

FIG. 30 is a table for explaining the data structure of a lower cloth parameter table.

FIG. 31 is a table showing fiber flag data in optical fiber count values.

FIG. 32 is a table showing temporary cloth edge position fiber numbers at a plurality of detection cycle count values when the cloth edge is smooth.

FIG. 33 is a view corresponding to FIG. 23 when the cloth end has a notch.

FIG. 34 is a view corresponding to FIG. 23 when the cloth edge has a fluff.

FIG. 35 is a partial plan view of an insole cloth having smooth cloth edges.

FIG. 36 is a view corresponding to FIG. 35 having a notch at the cloth edge.

FIG. 37 is a view corresponding to FIG. 35 having a fluff at the cloth edge.

FIG. 38 is a partial perspective view of an athletic shoe in which the toe portions of the insole cloth and the instep cloth are overlapped and sewn.

FIG. 39 is a schematic perspective view of a sewing machine according to a conventional technique.

[Explanation of symbols]

 SM sewing device M industrial lockstitch sewing machine 7 upper feed dog 8 lower feed dog 15 cloth edge control device 17 upper cloth moving device 18 lower cloth moving device 95 upper cloth edge detecting mechanism 97 upper cloth edge detecting sensor 98 first prism 99th 2 Prism 100 Lower cloth edge detecting mechanism 104 Lower cloth edge detecting sensor 105 First prism 106 Second prism 141 Upper cloth moving motor 142 Lower cloth moving motor 161 Linear solenoid 187 CPU 188 ROM 189 RAM C controller PTU Upper cloth parameter Table PTD Bottom cloth parameter table FA Top cloth fiber group FB Bottom cloth fiber group OSU1 to OSU10 Top cloth light emitting element ISU1 to ISU10 Top cloth light receiving element OSD1 to OSD10 Bottom cloth light emitting element ISD1 to ISD10 Bottom cloth light receiving element

Claims (2)

[Claims] 1. An upper feed means and a lower feed means capable of independently feeding an upper working cloth and a lower working cloth that are sewn together in an overlapping manner, and the upper working cloth and the lower working cloth are independently clothed. Upper working cloth moving means and lower working cloth moving means movable in a direction orthogonal to the feeding direction, and upper cloth edge detecting means capable of independently detecting the cloth edges of the upper working cloth and the lower working cloth. And a lower cloth edge detecting means, a feed storing means that stores in advance data relating to the relative feed of the upper and lower working cloths in association with the sewing position of the working cloth, and Cloth edge position data storage means that stores the reference position of the cloth edge of the work cloth in advance in association with the sewing position, sewing position detection means that detects the current sewing position of both the work cloths, and the sewing position detection Based on the output of the means and the data of the feed storage means, Based on the first control means for controlling the upper feed means and the lower feed means, the output of the sewing position detection means, and the data of the cloth edge position data storage means, the upper work cloth moving means and the lower work cloth A second control means for controlling the moving means, and a sewing device comprising: 2. The feed storage means is configured to store, as data relating to relative feed, data of a cloth feed ratio of a feed amount of a lower work cloth to a feed amount of an upper work cloth. The sewing device according to claim 1.