JPH07303779A - Sewing machine work cloth guide device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a work cloth guide device for a sewing machine that guides a curved sewing portion of a work cloth that is sent out from a sewing point in the cloth feed direction and is curved upward. A work cloth guide device for a sewing machine in which a work cloth is guided while being curved upward by a fixed guide plate 111 and a movable guide plate 112, and these work guide plates are on a common base plate 95. Further, the work cloth guide unit 100 is configured to be moved to the use position and the retracted position by the air cylinder 101.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work cloth guide device for a sewing machine, and more particularly, to a work cloth guide device that guides a curved sewing portion of a work cloth that is sent out from a sewing point in the cloth feed direction and is curved upward. The present invention relates to a cloth guide device.

[0002]

2. Description of the Related Art Conventionally, in order to sew a complicated object to be sewn such as a cloth shoe, a lower cloth and an upper cloth are separated by a cloth receiving plate at an upstream side of a needle drop position. , The lower cloth and the upper cloth are independently fed in the cloth feeding direction, and the lower cloth and the upper cloth are independently fed laterally in the lateral direction orthogonal to the cloth feeding direction.

For example, Japanese Patent Publication No. 58-48199 discloses a cloth for separating an upper cloth and a lower cloth at a position near the upper surface of a bed in order to sew an upper cloth and a lower cloth in an overlapping manner while aligning the cloth end positions. A support plate (separation plate) is provided, a lower cloth traverse mechanism is provided on the lower surface of the bed for laterally feeding the lower cloth through a pinion-shaped roller member, and an upper cloth is provided with a pinion-shaped roller member on the upper surface of the bed. An upper cloth lateral feed mechanism that laterally feeds through
There is disclosed a work cloth automatic guide device for an industrial sewing machine, which includes a cloth end stopper for receiving the cloth end of the upper cloth, a cloth end detecting device for detecting the cloth ends of the upper cloth and the lower cloth, respectively.

[0004] By using an industrial sewing machine having the automatic work cloth guide device, a cloth shoe can be manufactured by using the upper cloth of the cloth shoe as the lower cloth and the insole cloth as the upper cloth, and sewing the outer peripheral portions thereof. it can. For example, FIG. 1 according to the embodiment.
As shown in FIGS. 4 to 16, the lower cloth 3 (the upper cloth) and the upper cloth 2
When sewing a cloth shoe by sewing the outer peripheral part with (insole cloth), the heel portion 3a of the lower cloth 3 has a durable half-moon shaped core material 3
Since b is sewn in advance and the portion other than the heel portion 3a does not have a severe curved shape as shown in FIG. 14, it can be sewn relatively easily, but as shown in FIG. 15 and FIG. A half cylinder

When sewing the curved heel portion 3a,
Since the curved sewn portion of the lower cloth 3 and the upper cloth 2 that has been sewn rises upward in a curved shape, a skilled worker manually pulls the lower cloth 3 and the upper cloth 2 after sewing to the front side. The heel portion 3a is sewn while appropriately holding the three-dimensional shape. That is,
No work cloth guide device capable of automatically guiding the curved sewing portion as described above has been proposed. In the figure, reference numeral 8 is a restriction wheel that restricts the positions of the cloth ends of the lower cloth 3 and the upper cloth 2.

[0006]

When sewing a curved sewn portion which is sent out from the stitching point in the cloth feeding direction and is curved upward like the heel portion of the cloth shoe, an operator must sew it. Since it is necessary to properly guide the sewn curved sewn portion to guide it to the desired three-dimensional shape, it requires skill, it is difficult to improve work efficiency, and the operator guides If the item is deficient, there is a problem that the quality of the sewn product is likely to deteriorate. Therefore, it is conceivable to provide a work cloth guide device that automatically guides the curved sewn portion that has already been sewn. However, if the work cloth guide device is fixedly provided, the work cloth is sewn when sewing other than the curved sewn portion. There is also a problem that the guide device gets in the way. The purpose of the present invention is to
It is an object of the present invention to provide a work cloth guide device for a sewing machine that automatically guides a curved sewn portion that is sent out from a sewing point in the cloth feed direction and is curved upward.

[0007]

According to another aspect of the present invention, there is provided a sewing machine guide device for a sewing machine, which guides a curved sewing portion of a work cloth which is sent out from a sewing point in a cloth feed direction and is curved upward. A cloth guide device, wherein a fixed guide member for guiding a work cloth sent out in the cloth feed direction from the stitching point in a curved shape near a bed upper surface and a position near the needle drop position side of the fixed guide member for sewing A moving guide member that guides the work cloth while moving in a curved shape in accordance with the curved shape in which the work cloth is curved in accordance with the progress of sewing, and a guide member that moves the movement guide member in a curved shape according to the progress of sewing. A work cloth guide unit having a drive means mounted on a common base member, a guide means for movably guiding the work cloth guide unit in the cloth feed direction via the common base member, and a guide means for guiding the work cloth guide unit. Ru The factory cloth guide unit, and the use position,
A movement drive means for moving and driving the retracted position that is retracted by a predetermined stroke from the use position to the downstream side in the cloth feeding direction, and the guide member drive means and the movement driving means based on the sewing data used for sewing the work cloth. And a control means for controlling and.

Here, the control means detects the curved sewing portion based on the sewing data and controls the movement driving means so as to switch the work cloth guide unit to the use position only when the curved sewing portion is sewn. It may be configured to (claim 2 dependent on claim 1). The guide member driving means includes a link mechanism that includes a link member that rotates about a center of curvature when the movement guide member moves in a curved shape and supports the movement guide member, and a stepping motor that drives the link mechanism. A configuration including and may be provided (claim 3 dependent on claim 2). When the curved sewing portion is sewn, the control means guides the work cloth while the movement guide member moves in a curved shape in accordance with the curved shape in which the work cloth is curved in accordance with the progress of sewing. The stepping motor may be controlled.

[0009]

The work cloth guide device for a sewing machine according to claim 1 is a work cloth guide device for a sewing machine, which guides a curved sewn portion of a work cloth that is sent out from the stitching point in the cloth feed direction and is curved upward. In this work cloth guide device, the work cloth guide unit has a fixed guide member, a movement guide member, and a guide member drive means mounted on a common base member, and the fixed guide member feeds cloth from a stitching point. The work cloth fed in the direction is guided in a curved shape near the bed upper surface, and the movement guide member is a curved shape in which the work cloth is curved from the position near the needle drop position side of the fixed guide member as the sewing progresses. The work cloth is guided while moving in a curved shape in accordance with the movement, and the guide member driving means moves the movement guide member in a curved shape in accordance with the progress of sewing.

The guide means movably guides the work cloth guide unit in the cloth feed direction through the common base member, and the movement driving means moves the work cloth guide unit guided by the guide means to the use position and the use position. The drive means is moved and driven from the use position to the retracted position which is retracted by a predetermined stroke downstream in the cloth feed direction, and the control means controls the guide member drive means and the move drive means based on the sewing data used for sewing the work cloth. Control. By the fixed guide member, a curved sewing portion of the work cloth that is sent out from the sewing point in the cloth feeding direction and is curved upward,
Since it is guided in a curved shape near the bed upper surface, the curved sewing portion near the suture point can be guided in a curved shape. In addition, the movement guide member driven by the guide member drive means can guide the sewn curved sewn portion while maintaining the curved shape in which the curved sewn portion is curved in accordance with the progress of sewing.

Further, a guide means and a movement drive means are provided,
Since the work cloth guide unit is configured to be switchable between the use position and the retracted position, holding the work cloth guide unit in the retracted position when not in use reduces the versatility of the sewing machine. This can be prevented, and when using the work cloth guide unit, it can be quickly switched to the use position. Since the control means for controlling the guide member drive means and the movement drive means is provided based on the sewing data used for sewing the work cloth, the work cloth guide unit is switched to the use position when sewing the curved sewing portion. In addition, the movement guide member can be moved in a curved shape so as to match the shape of the curved sewn portion and the progress of sewing of the portion.

In the work cloth guide device for a sewing machine according to a second aspect of the present invention, the control means detects the curved sewn portion on the basis of the sewing data, and uses the work cloth guide unit only when the curved sewn portion is sewn. Since the movement driving means is controlled so as to switch the work cloth guide unit to the use position only when the curved sewing portion is sewn, the work cloth guide unit can be switched to the retracted position otherwise.

In the work cloth guide device for a sewing machine according to a third aspect of the present invention, the guide member driving means is rotatable about a center of curvature when the movement guide member moves in a curved shape and supports the movement guide member. Since the link mechanism including the members and the stepping motor that drives the link mechanism are provided, the movement guide member can be moved in a curved shape by the stepping motor via the link mechanism having a simple structure.

In the work cloth guide device for a sewing machine according to a fourth aspect of the present invention, when the control means sewes the curved sewing portion, the movement guide member has a curved shape in which the work cloth is curved as the sewing progresses. Since the stepping motor is controlled so as to guide the work cloth while also moving in a curved shape, the movement guide member can be moved so as to move in a curved shape in accordance with the progress of sewing of the curved sewing member. it can.

[0015]

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 an industrial sewing machine M provided with a work cloth lateral feed device.
In order to sew a cloth shoe 1 as shown in FIG. 19 and FIG. 20, this industrial sewing device M uses an upper cloth 2 as an upper cloth 2 and an upper cloth 2 as an insole cloth and an instep cloth as a lower cloth 3. On the other hand, the lower cloth 3 is sewn while the lower cloth 3 is pressed in while the cloth end portion is sewn over the entire circumference. As shown in FIG. 1, this industrial sewing machine M includes a lock stitch sewing machine 10 similar to an industrial lock stitch sewing machine, an upper cloth lateral feed device 30 disposed on the upper surface of a bed portion 11, and a bed portion. 11 includes a lower cloth lateral feeding device 70, a work cloth guiding device 90, an upper cloth end detecting device 130 and a lower cloth end detecting device 140, an operation panel 14 and a control unit 160. It is configured (see FIGS. 21 to 24). In the following description, the front side of the sewing machine M will be referred to as the front and the left-right direction will be referred to as the left-right direction.

First, the lockstitch sewing machine 10 will be described. The lockstitch sewing machine 10 includes a bed portion 11 mounted on a work table 15 as shown in FIGS.
And the pedestal portion 1 erected from the right end of the bed portion 11
2 and an arm portion 13 extending leftward from the upper end of the pedestal portion 12 so as to face the bed portion 11. In the bed portion 11, a lower feed dog vertical movement mechanism (not shown) for vertically moving the lower feed tooth 16 and a lower feed tooth forward / backward movement mechanism (not shown) for moving the lower feed tooth 16 back and forth, and the yarn catcher 2
5 and the like are provided.

The arm portion 13 has a needle bar drive mechanism for vertically moving a needle bar 18 to which a sewing needle 17 can be attached at the lower end, and a balance (not shown) for vertically moving when the needle bar 17 is vertically moved. A balance driving mechanism (not shown) for driving, a shuttle driving mechanism for driving the thread catcher 25 composed of a vertical shuttle, and an upper feed dog up-and-down moving mechanism for vertically moving the upper feed dog 19 for feeding the upper cloth 2 in the cloth feed direction ( (Not shown) and an upper feed dog back and forth moving mechanism (not shown) for moving back and forth
Etc. are provided. On the rear side of the needle bar 18,
A presser bar 22 is supported on the head 13a of the arm 13 so as to be vertically movable, and a presser foot 21 is attached to the lower end of the presser bar 22. The presser bar 22 and the upper feed dog 19 are connected to a presser foot driving solenoid,
The position of the presser bar 22 and the upper feed dog 19 is switched between the retracted position raised by the presser foot driving solenoid and the lowered working position.

The lower feed dog vertical movement mechanism of the lower feed tooth 16, the upper feed tooth vertical movement mechanism of the upper feed tooth 19, the needle bar drive mechanism, the balance drive mechanism, and the shuttle drive mechanism are the sewing machine motor 2
Driven by 3. The lower feed dog 16 is driven back and forth through the lower feed dog forward / backward moving mechanism at a feed amount according to the inclination of the feed controller that is changed by the drive amount of the linear solenoid. Further, the upper feed dog 19 is driven back and forth through the upper feed dog forward / backward moving mechanism by a feed amount according to the inclination of the feed controller which is changed by the rotation amount of the upper feed dog pulse motor. The working table 1
A sewing machine motor 23 is arranged immediately below 5 and is attached to the lower surface side of the work table 15. An operation panel 14 is attached to the top of the arm portion 13 of the lockstitch sewing machine 10, and the operation panel 14 is provided with a plurality of operation switches necessary for sewing work. In FIG. 1, reference numeral 24 is a lower shaft.

As shown in FIGS. 3 to 5, the cloth feed surface of the lower feed dog 16 is formed to have a slightly wider width.
Is arranged such that the cloth feed surface thereof slightly projects from the opening of the needle plate 27, and the needle hole 28 is formed in the needle plate 27 and the presser foot 21.
Are formed. The cloth feed surface of the upper feed dog 19 and the cloth feed surface of the presser foot 21 are positioned parallel to the feed direction and adjacent to each other on the left and right, and most of the cloth feed surface of the upper feed tooth 19 and the presser foot 21 are The left end of the cloth feed surface contacts the cloth feed surface of the lower feed dog 16 at a position near the left side of the needle drop position (that is, the needle hole 28) with the lower cloth 3 and the upper cloth 2 before and after sewing separated from each other. Is configured. Furthermore, at the right side position of the needle hole 28,
On the needle plate 27, a regulation wheel 8 that abuts on the right-side fabric edges of the lower cloth 3 and the upper cloth 2 to regulate the cloth edge position is arranged with its axis centered vertically. Is a vertical bolt 9 and needle plate 2
It is rotatably supported by 7.

Next, the upper cloth lateral feeding device 30 will be described. As shown in FIGS. 6 to 7, a mounting board 31 having a substantially L-shape in plan view is fixed to the upper surface of the bed portion 11 with screws, and a slide guide 32 is provided at a middle portion of the right half of the mounting board 31 in the front-rear direction. Is attached to the upper surface of a guide block (not shown) which is guided by the slide guide 32 so as to be movable in the left-right direction.
3 is fixed, and a horizontal second base plate 34 having a stepped shape in plan view is fixed to the front side portion of the first base plate 33, and a third base provided so as not to interfere with the second base plate 34. The plate 35 is arranged at substantially the same level as the second base plate 34, and a pivot block 37 is fixed to the upper surface of the right end of the plate 35. The pivot block 37 is attached to the upper surface of the second base plate 34. It is swingably provided around a pivot shaft 39 extending horizontally from the fixed pivot block 38 to the rear.

The cloth receiving plate 36 is arranged on the upper surface of the bed portion 11 and the needle plate 27 at the needle drop position, that is, at a position near the upstream side of the needle hole 28 in the cloth feeding direction, with the lower cloth 3 therebetween. The cloth receiving plate 36 is formed in an elongated rectangular shape on the left and right, and the right end portion thereof is fixed to the lower left end surface of the third base plate 35 by a bolt 41 via a spacer 41.
At a substantially middle position in the left-right direction of the third base plate 35
A mounting wall portion 42 that is erected in a standing wall shape is integrally formed on the third base plate 35, and a stepping motor 43 is attached to the rear side surface of the mounting wall portion 42 in the front-rear direction, and an output shaft 44 thereof is provided. The oscillating arm 46 is protruded to the front side of the mounting wall portion 42, externally fitted to the output shaft 44 and press-fitted and fixed in the pivot hole of the mounting wall portion 42, and the front end portion of the output shaft 44. Is pivotally supported up and down.

The swing arm 46 has a structure in which two plate members facing each other in parallel at a predetermined distance in the front and back are connected by a plurality of bolts, and a spacer is provided on the output shaft 44 between the two plate members. 47a and the timing pulley 47 are externally fitted and fixed, and a pinion-shaped upper cloth feeding roller member 48 and a timing pulley 49 are pivotally supported by a pivot pin 50 at the tip end portion of the swing arm 46. Member 48
The timing pulley 49 and the timing pulley 49 are fixed to the pivot pin 50 by press fitting and are rotatably attached together with the pivot pin 50. The timing pulley 47 and the tension pulley 5
1, the timing pulley 49, and the idle pulley 52, the timing belt 53 is wound around, and the stepping motor 43 allows the roller member 48 to selectively rotate in the forward rotation direction and the reverse rotation direction via the timing belt 53. The upper cloth 2 can be precisely laterally fed laterally by being rotationally driven.

As shown in FIGS. 6 and 7, the third base plate 3
5, an air cylinder 56 located on the right side of the output shaft 44 is attached in a vertical direction, and an output rod 56a thereof is
It is connected to the right end portion of the swing arm 46 via a connector 57. A stopper 58 is fixed to the third base plate 35 at a position on the right side of the output shaft 44 of the stepping motor 43 in order to regulate the swing arm 46 to a predetermined retracted position, and the swing arm 46 is fixed to the swing arm 46. , Stopper 5
A position regulating bolt 59 capable of abutting against 8 is attached so that the height position can be finely adjusted.

Output shaft 44 of the stepping motor 43
A stopper 60 is fixed to the third base plate 35 at a position on the left side of the third base plate 35, and a position regulating bolt 61 capable of contacting the stopper 60 is attached to the swing arm 46 so that the height position can be finely adjusted. . Therefore, as shown in FIG.
When the output rod 56a of the air cylinder 56 is extended,
The swing arm 46 swings counterclockwise in FIG. 6 to switch the swing arm 46 to its use position until the position regulating bolt 61 comes into contact with the stopper 60 to regulate the position. The roller member 48 is also switched via 46 to its use position. Here, by finely adjusting the height position of the position regulating bolt 61, the gap between the upper surface of the cloth receiving plate 36 and the roller member 48 can be finely adjusted according to the thickness of the upper cloth 2.

On the contrary, when the output rod 56a of the air cylinder 56 is retracted, the swing arm 46 is rotated clockwise in FIG. 6 until the position regulating bolt 59 contacts the stopper 58 to regulate the position. The swing arm 46 is switched to its retracted position by swinging to
The roller member 48 is also switched via 6 to its retracted position, which is moved upward from its use position.

As shown in FIGS. 6 and 7, the second base plate 3
An air cylinder 62 is provided on the upper surface of the right end portion of the No. 4 in a vertical direction, and a crank-shaped input plate 63 extending in the right direction is fixed to the pivot block 37.
The upper end of the second output rod 62a is connected to the input plate 63. Further, a stopper 64 is fixed to the upper end of the cylinder body of the air cylinder 62, and a position regulating bolt 65 that can contact the stopper 64 is attached to the input plate 63 so that the height position can be finely adjusted. Further, at a position to the left of the output shaft 44 of the stepping motor 43, a stopper 66 is fixed to the mounting substrate 31 and a position regulating bolt 6 that can abut the stopper 66 on the third base plate 34.
7 is attached so that the height position can be finely adjusted.

Therefore, the output rod 6 of the air cylinder 62
When 2a is extended, the third base plate 35 and the swing arm 46 swing in the counterclockwise direction around the pivot shaft 39, the position regulating bolt 67 abuts the stopper 66, and the third base plate 35 and The swing arm 46 is switched to the use position. By finely adjusting the height position of the position regulating bolt 67, the upper surfaces of the bed portion 11 and the needle plate 27, and the cloth receiving plate 3
The gap between the lower surfaces of 6 can be finely adjusted.

On the contrary, when the output rod 62a of the air cylinder 62 is retracted, the third base plate 35 and the swing arm 46 swing clockwise around the pivot shaft 39 to regulate the position. The bolt 65 comes into contact with the stopper 64, and the third base plate 35 and the swing arm 46 are switched to the retracted position in which the third base plate 35 and the swing arm 46 swing and move upward by a predetermined small angle.

In the upper cloth lateral feed device 30, a structure above the first base plate 33 such as the first, second and third base plates 33, 34 and 35, the cloth receiving plate 36, the swing arm 46 and the like. Is
The upper cloth lateral feed unit is configured in a unit shape, and the upper cloth lateral feed unit is inserted through the slide guide 32.
In order to switch between the sewing use position shown by a solid line in FIG. 7 and the non-use position shown by a chain line, an air cylinder 68 is horizontally attached to the flange portion 31a of the mounting substrate 31 in the left-right direction. Output rod 68 of this air cylinder 68
a is connected to the second base plate 34 via a connector 69. Most of the upper cloth lateral feed device 30 is configured as an upper cloth lateral feed unit, and the upper cloth lateral feed device 30 is also provided.
Is configured as a unit as an upper cloth transverse feed unit in which the upper cloth transverse feed unit is assembled on the mounting substrate 31 via the slide guide 32. Therefore, the upper cloth transverse feed device 30 is assembled and adjusted. , Repair, etc. are simplified.

Next, the lower cloth traverse device 70 for laterally traversing the lower cloth 3 will be described. As shown in FIGS. 8 and 9, an L-shaped bracket 71 is attached to the oil pan 26 that covers the lower surface side of the bed 11, and the main body 73 of the twin rodless cylinder 72 is obliquely attached to the bracket 71. The mounting bracket 7 having an L-shaped cross section is attached to the movable cylinder body 74 of the rodless cylinder 72.
5 is fixed to the mounting bracket 75, and an inclined arm 76 that extends upward to the vicinity of the lower surface of the left end portion of the cloth receiving plate 36 through the opening of the needle plate 27 is fixed at the lower end portion. A stepping motor 77 is fixed in the front-rear direction on the right side surface of the flange, and a timing pulley 78 is fixed horizontally to an output shaft 77a of the stepping motor 77 with its axis center in the front-rear direction.

A timing pulley 79 is rotatably attached to the upper end of the tilt arm 76 in parallel with the timing pulley 78. A timing belt 80 is wound around the timing pulleys 78 and 79. The lower cloth 3 is laterally fed by the timing belt 80 while sandwiching the lower cloth 3 between the top of the lower cloth and the lower surface of the cloth receiving plate 36. When the cylinder main body 74 is raised to the upper limit position by the rodless cylinder 72, the tilt arm 76 and the stepping motor 77 are switched to the use position, and the timing pulley 79 at the upper end of the tilt arm 76 is moved as shown in FIG. The upper end of the timing belt 80 on the outer peripheral side is held at a predetermined height position with a slight gap between it and the lower surface of the cloth receiving plate 36. On the contrary, when the cylinder main body 74 is lowered to the lower limit position by the rodless cylinder 72, the tilt arm 76 and the stepping motor 77 are lowered from the use position by a predetermined distance as shown by the chain line in FIG. It can be switched to the retracted position.

Next, the work cloth guide device 90 will be described. As shown in FIGS. 10 to 13, on the left side of the left end of the bed portion 11, a substantially rectangular first mounting substrate 91 is fixed to the central portion of the upper surface of the work table 15 in the front-rear direction, and the work table is provided. On the rear upper surface of 15,
The second mounting board 9 located behind the first mounting board 91
2 is fixed, and the first and second mounting boards 91, 91 are
On the upper surface of 92, a slide guide 93 having a predetermined length in the front-rear direction is fixed in the front-rear direction.

On the upper surface of the guide block 94, which is guided by the slide guide 93 so as to be movable in the front-rear direction,
The base plate 95 having a rectangular shape in plan view is fixed,
At the rear end portion, a mounting flange portion 9 having a substantially triangular shape in front view is provided.
6, a twin rod type air cylinder 97 is attached to the upper portion of the rear side surface of the mounting flange portion 96 with its output rod 97a directed downward to the right and inclined.
A connecting plate 99 is fixed to the tip ends of the two output rods 97a of the air cylinder 97 via a connecting member 98, and a work cloth guide unit 100 is attached to the connecting plate 99.
The work cloth guide unit 100 is configured to be vertically movable by a predetermined stroke in the inclination direction of the output rod 97a by the air cylinder 97.

The work cloth guide unit 100 is shown in FIG.
In order to make it switchable between the use position shown by the solid line and the retracted position (the position shown by the chain line in FIG. 10) moved a predetermined stroke rearward from this use position, the left end of the first mounting substrate 91 The air cylinder 101 is attached horizontally to the flange 91a at the rear end of the air cylinder 101 in the front-rear direction and rearward.
1 a is connected to the mounting flange portion 96. In order to restrict the position of the work cloth guide unit 100 for use, position restriction bolts 102 and 104 are attached to the left and right ends of the rear end of the first mounting substrate 91 so as to be finely adjustable in the front-rear direction and the front-rear direction. The flange portion 96 has a stopper 103, which can come into contact with the position regulating bolts 102, 104.
105 is attached.

As shown in FIG. 13, the work cloth guide unit 100 includes a frame 110 formed by pressing a plate material.
A curved fixed guide plate 111, a curved movement guide plate 112, a link mechanism 113 for moving the curved movement guide plate 112 in a curved shape, and a movement guide plate via the link mechanism 113. It is composed of a stepping motor 114 for driving 112.

As shown in FIG. 13, the frame 110 is
Is a fixed wall portion 115 fixed to the connecting plate 99, a vertical wall-shaped motor mounting wall portion 116 extending forward from the left end portion of the fixed wall portion 115, and a horizontal extending horizontally forward from the lower end portion of the fixed wall portion 115. Wall 117 and motor mounting wall 116
And a mounting wall portion 118 for mounting a horizontal wall-shaped fixed guide plate 111 extending from the lower end to the right. The mounting wall 118 of the frame 110 has a fixed guide plate 111.
Is fixed at its upper end. As shown in FIGS. 12 to 13, the fixed guide plate 111 is made of a relatively thin metal plate, is fed in the cloth feeding direction from the stitching point (needle drop position), and is curved upward in a substantially cylindrical shape. Teku lower cloth 3
Is provided near the needle plate 27, and the lower half portion of the fixed guide plate 111 is formed in a curved shape close to the curved shape of the heel portion 3a of the cloth shoe 1.

As shown in FIG. 13, the frame 110 is
On the left side surface of the motor mounting wall portion 116, a stepping motor 114 is attached in the left-right direction, and its output shaft 114a is inserted through the shaft hole of the motor mounting wall portion 116 to the right side of the motor mounting wall portion 116. This output shaft 1 protruding
An operating piece 119 for operating the origin detection switch 122 provided on the horizontal wall 117 is provided at the right end of 14a.
Is installed. The link mechanism 113 has a first link 120 fixed to the output shaft 114a at the lower end.
A second link 121 rotatably connected to the upper end of the first link 120 at the rear end, and the upper end of the first link 120 has a second end.
A third link 123 is rotatably connected to the front end of the link 121 and has a lower end connected to the front end of the motor mounting wall 116 via a pivot shaft 124 oriented in the left-right direction.

As shown in FIGS. 11 to 13, the movement guide plate 112 has a width larger than that of the fixed guide plate 111 in the left-right direction and has a curved shape similar to that of the fixed guide plate 111. Is arranged in a state of being slightly leftward from the right end of the fixed guide plate 111, and the moving guide plate 112 has an initial position before the start of its movement.
The fixed guide plate 111 is arranged near the front side of the fixed guide plate 111 so as to substantially follow the fixed guide plate 111 (see FIG. 12), and as shown in FIG.
Is fixed by a bolt 125 at an intermediate portion in the length direction of the movable guide plate 112, and the pivot shaft 124 is located at the approximate center of curvature of the curved shape of the movement guide plate 112, and the third link 123 is rotated around the pivot shaft 124. Then, the movement guide plate 112 is configured to be movable in a curved shape in accordance with the curved shape in which the sewn portion of the heel portion 3a is curved in accordance with the progress of sewing of the heel portion 3a of the cloth shoe 1. Yes (see FIG. 13).

As shown in FIGS. 10 and 11, a cover plate 106 is provided on the upper surface of the work table 15 to cover the slide guide 93 and the upper side of the first mounting substrate 91.
A slit (not shown) for preventing the cover plate 106 from interfering with the base plate 95 is formed, and the right end portion of the cover plate 106 is attached to the work table 15 via a strip 107 extending in the front-rear direction. The cover plate 106 is fixed and the left end of the cover plate 106 is fixed to the work table 15 via a strip 108 extending in the front-rear direction.

Next, the upper cloth end detecting device 130 and the lower cloth end detecting device 140 will be described. As shown in FIG. 21, a mounting member 1 for mounting the upper cloth end sensor 131 on the cloth receiving plate 36 so as not to interfere with the swing arm 46.
32 is fixed, and an upper cloth cloth end sensor 131 is attached to the mounting member 132 so as to face the cloth end of the upper cloth 2 and the upper surface of the cloth receiving plate 36. Further, the needle plate 27 is provided with a lower cloth end sensor 141 so as to face the cloth end of the lower cloth 3 and the lower surface of the cloth receiving plate 36. The upper surface and the lower surface of the cloth receiving plate 36 are formed so that the reflectance of light rays is high.

The upper cloth end detecting device 130 will be described in detail. As shown in FIG. 22, for example, the light rays incident from ten optical fibers 134 are incident on the prism 13.
After the direction of 45 degrees is changed by the first reflecting surface 133a of No. 3, the direction of the direction of 45 degrees is changed by the second reflecting surface 133b.
It is converted into 10 downward rays orthogonal to e. At the base end of each optical fiber 134 is a light emitting diode 135.
A light ray is incident on the optical fiber 134 and is emitted downward from the prism 133 through each optical fiber 134. The light ray is reflected on the upper surface of the upper cloth 2 or the upper surface of the cloth receiving plate 36 and is incident on the optical fiber 134 emitted. And the reflected incident light is
The half mirror 136 disposed between the base end of the optical fiber 134 and the light emitting diode 135 changes the direction of the light by 45 degrees and enters the corresponding photodiode 137, and the photodiode 137 causes an electric signal (cloth end) corresponding to the light intensity. Detection signal) and supplied to the control unit 160. The light rays reflected on the upper surface of the upper cloth 2 receive the cloth receiving plate 36.
Since it becomes weaker than the light ray reflected on the upper surface of the cloth, the cloth edge 2e of the upper cloth 2 can be detected from the strength of the cloth edge detection signal from the ten photodiodes 137.

The lower cloth end detecting device 140 will be described in detail. The lower cloth end detecting device 140 has the same structure as the upper cloth end detecting device 130, and as shown in FIG.
For example, the light rays incident from the ten optical fibers 144 are changed in direction by 45 degrees by the first reflection surface 143a of the prism 143, and then changed in direction by 45 degrees by the second reflection surface 143b, and are orthogonal to the cloth edge 3e of the lower cloth 3. Is converted into 10 upward rays.

Light rays are incident on the base end of each optical fiber 144 from the light emitting diode 145, and the light rays emitted upward from the prism 143 through the inside of each optical fiber 144 are on the lower surface of the lower cloth 3 or the cloth receiving plate 36. The reflected light is reflected by the lower surface of the optical fiber 144 and is emitted into each optical fiber 144. The reflected incident light is reflected by the half mirror 146 disposed between the base end of the optical fiber 144 and the light emitting diode 145.
The light is converted by 5 degrees and incident on the corresponding photodiode 147, converted into an electric signal (cloth edge detection signal) corresponding to the light intensity by the photodiode 147, and supplied to the control unit 160. The light rays reflected on the lower surface of the lower cloth 3 are
Since it becomes weaker than the light rays reflected on the lower surface of the cloth receiving plate 36, the cloth edge 3e of the lower cloth 3 can be detected from the strength of the cloth edge detection signal from the ten photodiodes 147. Reference numeral 148 is a lower cloth detection sensor mounting member.

Next, the control system of the industrial sewing machine M described above will be described. As shown in FIG. 24, the control unit 160 includes a CPU 161, a ROM 162, and a RAM 1.
It includes a microcomputer including 63, an input interface 164, and an output interface 165. The ROM 162 previously stores a control program for sewing control, which will be described later. The RAM 163 stores various memories for sewing control. And a buffer are provided, and the input interface 164 includes a data creation device 150 that creates sewing data for sewing the cloth shoe 1.
Upper cloth end detecting device 130 and lower cloth end detecting device 140
The operation panel 14 and the timing sensor 154 for detecting the rotational phase of the upper shaft of the sewing machine are connected to each other.

The output interface 165 of the control unit 160 includes a presser bar up / down solenoid 151, an upper feed adjusting stepping motor 152, a lower feed adjusting linear solenoid 153, and a swing arm rotating unit for rotating the swing arm 46. The cylinder 56, the cloth receiving plate rotating cylinder 62 for rotating the cloth receiving plate 36, the upper cloth lateral feed stepping motor 43, the tilt arm elevating cylinder 74, the lower cloth lateral feed stepping motor 77, and the work cloth guiding unit 100. Work cloth guide unit to move back and forth Cylinder 101 to move back and forth, work cloth guide unit lifting cylinder 97 to move work cloth guide unit 100 up and down, guide plate driving stepping motor 11 to move and move guide plate 112
4, the sewing machine motor 23, etc. are connected, and these are controlled by the control unit 160 and controlled by a command from the operation panel 14. The cylinders are actually controlled via the direction switching valve.

Next, the sewing data and the sewing order will be described. FIG. 25 shows the upper cloth 2 of the cloth shoe 1 for the left foot.
The upper surface (the back surface after being formed on the cloth shoe 1) is shown in FIG.
Reference numeral 6 denotes the upper surface of the lower cloth 3 (the inner surface after forming the cloth shoe 1), and the outer peripheral edges of the upper cloth 2 and the lower cloth 3 are
For example, 12 notches (notch numbers N = 0 to 11) are formed, and the notches are divided into one to a plurality of sewing sections (sewing section numbers K = 0, 1, 2) and each sewing is performed. The section has an arc shape with a constant curvature. When the cloth shoe 1 is sewn, the sewing is first performed from the notch number N = 0 in the direction of the arrow, that is, in the order of the notch number N.

The data creating device 150 is a device for inputting and creating sewing data regarding the upper cloth 2 (middle bottom cloth) and the lower cloth 3 (upper cloth) through image reading or the like. The sewing data created by 150 is
This is as shown in FIG. In the sewing data, the unit of length is mm, the number of stitches indicates the number of stitches for sewing in each sewing section, the upper feed amount indicates the feed amount of the upper feed dog, and the lower feed amount indicates the lower feed dog. Indicates the feed amount. Data “2” on the cloth edge sensor
Indicates that the number of light rays coming to the upper side of the upper cloth 2 is two, and the data “3” under the cloth edge sensor indicates that the number of light rays coming to the lower side of the lower cloth 3 is three. Show. For the speed level, the rotation speed of the sewing machine motor 23 (200 to 2000 rpm) is set to 10
The speed level divided into stages is shown. The guide drive amount indicates the number of steps of the motor 114 for moving the movement guide plate 112 by the stepping motor 114 for each stitch.

Then, using the industrial sewing machine M, the cloth shoes 1
The sewing control when sewing is described with reference to the flowcharts of FIGS. 28 and 29. In the flow chart, the symbol Si (i = 1, 2, 3, ...) Indicates each step. In addition, prior to this sewing, the data creation device 15
The sewing data is transferred from 0 to the memory of the RAM 163 in advance, and the sewing is performed using the sewing data. Then, the control is started in a state where the lower cloth 3 and the upper cloth 2 are set in a predetermined state.

When the sewing start switch of the operation panel 14 is turned on (S1: Yes), the presser bar 22 is lowered by the solenoid 151, the swing arm 46 is swung downward by the air cylinder 56, and tilted by the air cylinder 74. The arm 76 is raised (S2). Next, the heel part 3 first
Due to the sewing of a, while the work cloth guide unit 100 is raised by the air cylinder 97, the work cloth guide unit 100 is switched to the advanced use position by the air cylinder 101 (S3), and then the air cylinder 97.
Thus, the work cloth guide unit 100 is switched to the lowered position (S4).

Next, the sewing machine motor 23 is driven at a predetermined speed (S5), and then the notch number counter N, the section number counter K and the stitch number counter P are set to 0 (S6). Next, the sewing data designated by the notch number counter N and the section number counter K is read (S
7). Next, the stepping motor 152 for adjusting the upper feed is driven based on the data of the upper feed amount, the linear solenoid 153 for adjusting the lower feed is driven based on the data of the lower feed amount, and based on the data of the speed level. Sewing machine motor 23
The rotational speed of is controlled (S8).

Next, it is determined whether or not the sewing drive data includes guidance drive amount data, that is, whether or not the heel portion 3a is sewn (S9). If the determination is Yes, the flag F is set to 1. It is set (S10), and then the process proceeds to S14. S1
If the result of the determination in step 4 is Yes, the guide plate driving stepping motor 114 is driven according to the guide driving amount data (S
15) Next, the cloth edge detection signal of the upper cloth 2 and the cloth edge detection signal of the lower cloth 3 are read (S16), and the cloth of the upper cloth cloth edge detection device 130 and the lower cloth cloth edge detection device 140 is then read. On the basis of the edge detection signal, the deviation amounts of the cloth ends of the upper cloth 2 and the lower cloth 3 with respect to the respective reference positions are calculated (S17), and then the deviation amounts of the cloth ends with respect to the respective reference positions are eliminated. The upper cloth lateral feed stepping motor 43 and the lower cloth lateral feed stepping motor 77 are driven (S18). In S19,
It is determined whether or not the needle down signal included in the detection signal from the timing sensor 154 is input. When the determination is Yes, the needle number counter P is incremented by 1 (S2
0) Next, it is determined whether or not the count value P of the stitch number counter P is less than or equal to the stitch number Pst of the sewing data (S21).
If Yes, the process proceeds to S14 and S14 and subsequent steps are repeatedly executed. When the sewing is completed by the number of stitches Pst in the sewing data and the count value P becomes (Pst + 1), S21 to S2.
Move to 2.

Then, in S22, the section number counter K is incremented by 1 and the stitch number counter P is reset to 0. Next, it is determined whether or not the count value K of the section number counter K is less than or equal to the number of sections Kst of the sewing data (S23). If the determination is Yes, the process proceeds to S7, and S7 and subsequent steps are repeatedly executed. When the count value K of the section number counter K reaches (Kst + 1), the process proceeds from S23 to S24, the notch number counter N is incremented by 1, and the section number counter K is reset to 0 (S24). Next, it is determined whether or not the count value N of the notch number counter N is less than or equal to the maximum notch number Nmax of the sewing data (S25).
If Yes, the process returns to S7 and S7 and subsequent steps are repeatedly executed.

When the sewing of the heel portion 3a is completed and the determination in S9 is No, the work cloth guide unit 100 is switched to the raised position by the air cylinder 97 (S11). , Then the air cylinder 101
Thus, the work cloth guide unit 100 is switched to the retracted position (S14), and then the flag F is reset to 0 (S).
13). Then, the determination in S14 becomes No, and S14 to S
Move to 16.

In this way, the sewing progresses in the order of the notch number N, and when the sewing is completed over the entire circumference, the notch number N becomes (Nmax +1), so that the process shifts from S25 to S26, and the sewing machine motor 23 Is stopped (S26), and the sewing end process is executed (S27). The sewing end process is a process in which the tilt arm 76 is lowered, the swing arm 46 is swung upward, and the presser bar 22 is raised. Although the sewing control when sewing one cloth shoe 1 has been described above, the cloth shoes 1 are sewn one after another in the same manner.

Next, the operation of the industrial sewing machine M described above will be described. At the start of sewing, the upper cloth traverse unit is moved from the non-use position to the sewing use position, and the tilt arm 76 of the lower cloth traverse device 70 is held at the lowered position.
With the cloth receiving plate 36 switched to the retracted position, set the lower cloth 3 between the needle plate 27 and the cloth receiving plate 36, and then
When the upper cloth 2 is set between the cloth receiving plate 36 and the roller member 48 in a state in which is switched to the use position and the swing arm 46 is switched to the retracted position, the preparation for sewing is completed.

Next, as described above, the presser bar 22 is lowered, the swing arm 46 is swung downward, the tilt arm 76 is raised, and the lockstitch sewing machine 10 is operated to operate the lower cloth 3 and the upper cloth. 2 is sewn, but at the time of sewing, the cloth ends of the upper cloth 2 and the lower cloth 3 come into contact with the restriction wheel 8 to be positionally controlled, and the cloth end detection signal detected by the upper cloth end detecting device is detected. On the basis of the above, the control unit controls the stepping motor 43 of the upper cloth lateral feeding device 30 to carry out the lateral feeding of the upper cloth 2 so that the cloth end of the upper cloth 2 becomes the position instructed by the sewing data,
Further, based on the cloth edge detection signal detected by the lower cloth edge detecting apparatus, the control unit controls the stepping motor 77 of the lower cloth lateral feeding apparatus 70 to instruct the cloth edge of the lower cloth 3 by the sewing data. The lateral feed of the lower cloth 3 is performed so that the lower cloth 3 is positioned.

As shown in FIGS. 14 to 16, sewing is performed along the outer peripheral portions of the lower cloth 3 and the upper cloth 2. The inner surface of the heel portion 3a of the lower cloth 3 has a half-moon-shaped core in advance. The material 3b is sewn, and the heel portion 3a of the cloth shoe 1 is sewn first. When the heel portion 3a is sewn, the sewn heel portion 3a moves backward from the needle drop position. When the heel portion 3a is completely sewn, the heel portion 3a is curved into a semi-cylindrical shape.

At the start of sewing of the heel portion 3a, the work cloth guide unit 100 is set to the use position as shown in FIGS. 10 and 12, and the output rod 9 of the air cylinder 97 is set.
By extending 7a, the work cloth guide unit 100 is set to the lowered position. Then, while the heel portion 3a is being sewn, as shown in FIG. 17, the outer surface side of the heel portion 3a, which is sewn and curved upward, is curved by the fixed guide plate 111 at a position near the upper surface of the bed portion 11. Will be guided to.

On the other hand, the stepping motor 1 controlled by the control unit 160 is started when the heel portion 3a is sewn.
14 is driven to rotate counterclockwise in FIG. 13 at a low speed based on the data of the guide drive amount of the sewing data, and the movement guide plate 112 is rotated around the pivot shaft 124 via the link mechanism 113. As shown in FIGS. 12 and 18, the outer surface of the heel portion 3a of the lower cloth 3 moves and moves in a curved shape in accordance with the curved shape of the heel portion 3a that curves in accordance with the progress of sewing of the heel portion 3a. The side is guided so that it becomes a three-dimensional partial cylindrical shape. At this time, at the beginning, the movement guide plate 11
2 moves backward and upward in a curved shape, in the next stage, the movement guide plate 112 moves upward in a curved shape, and in the final stage, the movement guide plate 112 moves upward and forward in a curved shape, The outer surface side of the heel portion 3a of the lower cloth 3 is guided so as to have a partially cylindrical shape.

Therefore, when the cloth shoe 1 is sewn, the sewing of the heel portion 3a, which is the most difficult to form into a predetermined three-dimensional shape, is significantly simplified, and even an unskilled worker can efficiently sew. In addition, since the shape of the sewn portion of the heel portion 3a can be reliably guided to the desired partial cylindrical shape, the quality of the sewn product of the heel portion 3a is significantly improved. Here, since the movement guide plate 112 is configured to rotate via the link mechanism 113, the stepping motor 114
Thereby, the movement guide plate 112 can be moved in a curved shape via the link mechanism 113 having a simple structure.

Further, a slide guide 93 for guiding the work cloth guide unit 100 movably in the front-back direction is provided, and an air cylinder 101 for moving the work cloth guide unit 100 in the front-back direction is provided, so that the work cloth guide unit 100 is
Since it is possible to switch between the use position and the retreat position in which the work position is retracted backward by a predetermined stroke, when the work cloth guide unit 100 is not used, the work cloth guiding unit 100 is switched to the retreat position, so that the sewing machine M can be used for general purposes. It is possible to prevent the deterioration of the sex. Further, the work cloth guide unit 100 is automatically switched to the use position only when the heel portion 3a is sewn, and the work cloth guide unit 100 is automatically switched to the retracted position after the completion of sewing of the heel portion 3a. Therefore, the work cloth guide unit 100 does not get in the way when the parts other than the heel part 3a are sewn.

Further, since the work cloth guide unit 100 can be switched between the raised position and the lowered position by the air cylinder 97, when the position of the work cloth guide unit 100 is switched, the work cloth guide unit 100 is raised. It can be held in position and the position can be switched smoothly.

On the other hand, in the upper cloth lateral feeding device 30, the cloth receiving plate 36 can be switched between the use position and the retracted position together with the third base plate 35 and the swing arm 46. Since the swing arm 46 can be switched between the use position and the retracted position, the upper cloth 2 can be easily attached and detached. Further, since the upper cloth traverse unit is configured to be switchable between the sewing use position and the non-use position retracted to the right, the sewing device M can also be used as a normal sewing machine.

In the above embodiment, the work cloth guide device 90 for guiding the heel of the cloth shoe has been described as an example.
The present invention can be similarly applied to a work cloth guide device that guides not only the heel part of a cloth shoe but also various curved sewing parts. Further, it is possible to carry out the embodiment in which various modifications are added to the work cloth guide device 90 of the embodiment without departing from the spirit of the present invention.

[0065]

As described above in the section of the operation, according to the present invention, the following effects can be obtained. According to the work cloth guide device for a sewing machine of claim 1, a work cloth for guiding the work cloth in order to guide the curved sewing portion of the work cloth which is sent out from the stitching point in the cloth feed direction and curved upward. Since the guide unit, the guide means, the movement drive means, and the control means are provided, and the work cloth guide unit is provided with the fixed guide member, the movement guide member, and the guide member drive means, the cloth feeding from the stitching point. The work cloth sent out in the direction can be guided to a curved shape near the bed upper surface by the fixed guide member, and the curved sewn portion that has been sewn and is curved upward as the sewing progresses, The movement guide member can guide the work cloth in accordance with a curved shape in which the work cloth is curved in accordance with the progress of sewing.

Further, a guide means and a movement drive means are provided,
Since the work cloth guide unit is configured to be switchable between the use position and the retracted position, holding the work cloth guide unit in the retracted position when not in use reduces the versatility of the sewing machine. This can be prevented, and when using the work cloth guide unit, it can be quickly switched to the use position. Further, since the control means for controlling the guide member drive means and the movement drive means is provided based on the sewing data used for sewing the work cloth, when sewing the curved sewing portion,
The work cloth guide unit can be switched to the use position, and the movement guide member can be moved in a curved shape so as to match the shape of the curved sewing portion and the progress of sewing of the portion.

According to the work cloth guide device of the sewing machine of the second aspect, the control means detects the curved sewing portion based on the sewing data and uses the work cloth guiding unit only when sewing the curved sewing portion. Since the movement drive means is controlled so as to switch to the position, the work cloth guide unit is switched to the use position only when the curved sewing portion is sewn, and at other times,
The work cloth guide unit can be switched to the retracted position.

According to the work cloth guide device of the sewing machine of the third aspect, the guide member driving means rotates about the substantially center of curvature when the movement guide member moves in a curved shape and supports the movement guide member. Since the link mechanism including the link member and the stepping motor that drives the link mechanism are provided, the movement guide member can be moved in a curved shape by the stepping motor via the link mechanism having a simple structure.

According to the work cloth guide device for a sewing machine of the fourth aspect, the control means is such that, when the curved sewing portion is sewn, the movement guide member bends the work cloth in accordance with the progress of sewing. The stepping motor is controlled so as to guide the work cloth while moving in a curved shape in accordance with the movement of the work cloth. Therefore, the movement guide member can be moved so as to move in a curved shape according to the progress of sewing of the curved sewing member. it can.

[Brief description of drawings]

FIG. 1 is a front view of an industrial sewing device according to an embodiment of the present invention.

FIG. 2 is a plan view of a bed portion of a lockstitch sewing machine of the sewing device.

FIG. 3 is an enlarged front view of an essential part of the lockstitch sewing machine.

FIG. 4 is a plan view of the needle plate, presser foot, and upper and lower feed dogs of the lockstitch sewing machine.

FIG. 5 is an enlarged side view of an essential part of the lockstitch sewing machine.

FIG. 6 is a front view of an upper cloth lateral feed device of the sewing device.

FIG. 7 is a plan view of an upper cloth lateral feed device and the like of the sewing device.

FIG. 8 is a side view of a lower cloth lateral feed device of the sewing device.

9 is a front view of the lower cloth lateral feeding device and the like of FIG. 8.

FIG. 10 is a plan view of a work cloth guide device of the sewing device.

FIG. 11 is a front view of the work cloth guide device.

FIG. 12 is a right side view of the work cloth guide device.

FIG. 13 is a perspective view of a work cloth guide unit of the work cloth guide device.

FIG. 14 is a perspective view of a main part of the lower cloth and the upper cloth immediately before the start of sewing the heel portion of the cloth shoe.

FIG. 15 is a perspective view of essential parts of the lower cloth and the upper cloth during sewing of the heel portion of the cloth shoe.

FIG. 16 is a perspective view of a main part of a lower cloth and an upper cloth when sewing of a heel portion of the cloth shoe is completed.

FIG. 17 is a right side view of the fixed guide plate, the moving guide plate and the like immediately before the start of sewing the heel portion of the cloth shoe.

FIG. 18 is a right side view of the fixed guide plate, the moving guide plate and the like when sewing of the heel portion of the cloth shoe is completed.

FIG. 19 is a perspective view of the cloth shoe after sewing.

FIG. 20 is a perspective view of the cloth shoe after sewing.

FIG. 21 is an enlarged front view of the main part in the vicinity of the upper cloth material edge sensor and the lower cloth material edge sensor.

FIG. 22 is an overall perspective view of an upper cloth material edge detection device.

FIG. 23 is an overall perspective view of a lower cloth cloth edge detection device.

FIG. 24 is a block diagram of a control system of the industrial sewing machine.

FIG. 25 is an explanatory diagram illustrating a sewing section and the like of the upper cloth.

FIG. 26 is an explanatory diagram illustrating a sewing section of the lower cloth and the like.

FIG. 27 is an explanatory diagram illustrating the content of sewing data.

FIG. 28 is a part of a flowchart of a sewing control routine.

FIG. 29 is the rest of the flowchart of the sewing control routine.

[Explanation of symbols]

M Industrial sewing device 2 Upper cloth 3 Lower cloth (corresponding to working cloth) 10 Lockstitch sewing machine 11 Bed section 90 Working cloth guiding device 93 Slide guide (corresponding to guiding means) 95 Base plate 97 Air cylinder (for lifting means) (Corresponding) 100 work cloth guide unit 101 air cylinder (corresponding to moving driving means) 111 fixed guide plate (corresponding to fixed guide member) 112 moving guide plate (corresponding to moving guide member) 113 link mechanism 114 stepping motor ( (Corresponding to a part of the guide member driving means) 123 Third link (corresponding to link member) 124 Pivot shaft 160 Control unit

Claims (4)

[Claims] 1. A work cloth guide device for a sewing machine, which guides a curved sewing portion of a work cloth which is sent out from a sewing point in a cloth feeding direction and is curved upward, wherein the work cloth guiding device is fed from the sewing point in a cloth feeding direction. A fixed guide member for guiding the work cloth to be curved into a curved shape near the bed upper surface,
A movement guide member for guiding the work cloth while moving in a curved shape in accordance with a curved shape of the work cloth curved from a position near the needle drop position side of the fixed guide member in accordance with progress of sewing, and the movement guide member. A work cloth guide unit in which a guide member driving means for moving the work piece in a curved shape in accordance with the progress of sewing is mounted on a common base member, and the work cloth guide unit in the cloth feed direction via the common base member. The guide means for movably guiding and the work cloth guide unit guided by the guide means are driven to move over a use position and a retracted position retracted by a predetermined stroke from the use position to the downstream side in the cloth feed direction. And a drive means for controlling the guide member drive means and the movement drive means on the basis of sewing data used for sewing the work cloth. Internal device. 2. The control means detects a curved sewing portion based on the sewing data, and controls the movement driving means so as to switch the work cloth guide unit to a use position only when the curved sewing portion is sewn. The work cloth guide device for the sewing machine according to claim 1, wherein 3. The link mechanism, wherein the guide member driving means includes a link member that rotates around a substantially center of curvature when the movement guide member moves in a curved shape and supports the movement guide member, and the link mechanism. The work cloth guide device for a sewing machine according to claim 2, further comprising a stepping motor that drives the machine. 4. The control means, when sewing the curved sewing portion, moves while the movement guide member moves in a curved shape in accordance with a curved shape in which the work cloth is curved in accordance with the progress of sewing. The machined cloth guide device for a sewing machine according to claim 3, wherein the stepping motor is controlled so as to guide the cloth.