JPH08187380A - Sewing device - Google Patents

Abstract

PURPOSE: To smoothly feed cloth by turning curved line sewing to an out curve or an in curve by controlling a first or second object-to-be-sewn feeding mechanism so that speed for the first and second object-to-be-sewn feeding mechanisms to feed the object to be sewn can be made different corresponding to the detected result. CONSTITUTION: Outside and inside photosensors 31A and 32A are provided to detect the edge of an upside object A to be sewn and outside and inside photosensors 31B and 32B are provided to detect the edge of a downside object B to be sewn. Then, when the outside photosensor 31A/31B is covered with the objects A/B to be sewn but the inside photosensor 32A/32B is not covered with the objects A/B to be sewn, the feeding speed of a feeding roller 26A/26B is not changed. When the objects A/B to be sewn cover the inside photosensor 32A/32B as well, the feeding speed of the feeding roller 26A/26B is accelerated so that the sewing line can be turned to the inside bent in curve. Besides, when even the outside photosensor 31A/32B is not covered, the feeding roller 26A/26B is decelerated so as to provide the out curve.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine, and more particularly to an improvement of a sewing machine useful for curved stitches.

[0002]

2. Description of the Related Art Conventionally, a sewing machine for sewing such curved stitches, for example, stitching curved edges of two cloths will be described below. In this sewing machine, cloths are sewn together near a cloth feeding mechanism, and a stopper is provided at a position displaced in a direction orthogonal to the cloth feeding direction of the cloth feeding mechanism. This stopper can move up and down, and when the cloth is pressed down to press the cloth, it is possible to perform stitching in a curved shape centering on the stopper. When the stopper moves upward and separates from the cloth, straight stitching is performed. This stopper includes a ball type and a plate type.

There is also one using a mechanism called a manipulator. This is a roller type cloth feeding device,
The cloth feeding mechanism is provided as an extension of the cloth feeding direction and feeds the cloth in a direction orthogonal to the cloth feeding direction of the cloth feeding mechanism. When the cloth feed direction of the manipulator is switched so as to cause a right shift with respect to the cloth feed direction, the curved sewing can be made into an out curve curved outward. Further, when the cloth feed direction of the manipulator is switched so as to cause a left shift with respect to the cloth feed direction, the curved stitch can be made into an incurve curved inward.

[0004]

However, in the case of using the above-mentioned stopper, the curved stitch can be formed into an out curve which is curved outward. However, it is not possible to make an outwardly curved outcurve. In order to turn the curved stitch incurve, a stopper must be provided on the side opposite to the cloth feed mechanism.

Further, in the case of using the above manipulator, the curved sewing can be either out-curve or in-curve. However, the cloth feed direction of the manipulator is a direction orthogonal to the cloth feed direction of the entire cloth, which is unreasonable. In other words, the cloth that was sent could get stuck at the manipulator, and the cloth could not be fed smoothly. This is remarkable especially when the thickness of the cloth is increased.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to make curved stitches out-curved outwardly or curved stitches in-curved inwardly and smoothly. An object of the present invention is to provide a sewing device capable of feeding cloth.

[0007]

In order to achieve the above-mentioned object, the present invention provides a first sewn-material feeding mechanism, in which the sewn material is displaced in an orthogonal direction component with respect to the feeding direction of the sewn material. 2 is configured to feed the sewn object in the same direction, and the speed at which the sewn object is fed by the first sewn object feeding mechanism is set according to the detection result of the edge of the sewn object. The speed at which the second workpiece is fed by the second workpiece feeding mechanism is controlled to be different.

[0008]

As a result, when the feed speed of the second work feed mechanism is higher than the feed speed of the first work feed mechanism, the curved stitch can be made into an out-curve curved inward. On the contrary, if it becomes late, the curved stitch can be made into an incurve curved outward. It should be noted that this relationship is reversed if the positions where the both feed mechanisms are provided are reversed.

[0009]

[Example] 1. Appearance of sewing machine Fig. 1 shows the appearance of the sewing machine. A head 2 of the sewing machine is provided on the table 1, and a presser bar 3 and a needle bar 4 are provided below the head 2 so as to project therefrom. An “L” -shaped presser bar 3a is attached to the tip of the presser bar 3.
This presser bar 3 is moved up and down by the operation of a lever (not shown), and when it is moved down, A and B of the workpiece are pressed by the presser bar 3a from above. In the opening of the table 1 below the presser foot 3a, a feed bar 5 is provided.
The feed box 5 swings up and down in the opening of the table 1 and comes in contact with and separates from the presser box 3a, and further reciprocates back and forth,
As a result, the sewing products A and B are sent backward.

A needle 4a is detachably attached to the tip of the needle bar 4, and a needle thread (not shown) is placed in the needle hole of the needle 4a.
Is passed through. The needle thread is supplied from a spool (not shown). A hook (not shown) is provided below the feed rod 5, and a bobbin (not shown) is supplied from a bobbin (not shown) in the hook. The needle bar 4 and the feed rod 5 are interlocked with each other by a sewing motor 6 provided under the table 1, whereby the articles A and B to be sewn are sewn together by the upper thread and the lower thread.

A separating plate 7 is fixed on the table 1 via a spacer 8. The vicinity of the presser bar 3 and the needle bar 4 of the separating plate 7 is cut out. The spacer 8 is located at the right end of the separating plate 7 and
Is fixed to a position slightly above the upper surface of the table 1. The separating plate 7 is made of metal, and both upper and lower surfaces thereof are smoothly finished. The work A is located above the separating plate 7 and the work B is
Are set so as to be located below the separating plate 7. This set is performed manually or automatically.

A horizontal bracket 11A is fixed to the lower portion of the side surface of the head 2, and the horizontal bracket 11A is
A convex rail 12A extending in the horizontal direction is fixed. A concave rail 13A is attached to the convex rail 12A and is slidable in the horizontal direction. A horizontal air cylinder 14A is horizontally fixed to the horizontal bracket 11A, and a tip of a piston rod 15A of the horizontal air cylinder 14A is fixed to the concave rail 13A. Therefore, when the horizontal air cylinder 14A operates, the concave rail 13A moves in the horizontal direction.

A vertical bracket 16A is fixed to the concave rail 13A, and a convex rail 17A extending in the vertical direction is fixed to the vertical bracket 16A. A concave rail 18A is attached to the convex rail 17A,
It can slide vertically. A vertical air cylinder 19A is vertically fixed to the vertical bracket 16A, and a tip of a piston rod 20A of the vertical air cylinder 19A is fixed to the concave rail 18A. Therefore, when the vertical air cylinder 19A operates, the concave rail 18A moves in the horizontal direction.

A vertically extending cover member 21A is fixed to the concave rail 18A, and the cover member 21A is fixed.
Pulleys 22A and 23A are rotatably attached to the upper and lower parts of the inside, and a rubber belt 24A is stretched over the pulleys 22A and 23A. Upper pulley 22A
A feed motor 25A, which is a step motor, is connected to. A feed roller 26A is connected to the lower pulley 23A. Therefore, the feed roller 26A is rotated by driving the feed motor 25A.

The outer peripheral surface of the feed roller 26A is formed into a rough surface so that the material to be sewn A can be slipped and fed to the separating plate 7. Further, the feed motor 25A, the feed roller 26A, and the cover member 21A move back and forth and up and down by the operation of the horizontal air cylinder 14A and the vertical air cylinder 19A. The convex rails 12A, 17A and the concave rails 13A, 18A are provided with stoppers so that the concave rails 13A, 18A do not separate from the convex rails 12A, 17A.

Further, the horizontal bracket 11A, the convex rail 12A, the concave rail 13A, and the horizontal air cylinder 14 described above.
A, piston rod 15A, vertical bracket 16A, convex rail 17A, concave rail 18A, vertical air cylinder 19
A, piston rod 20A, cover member 21A, pulley A, belt 24A, feed motor 25A, feed roller 26
The same thing as A is provided below the separating plate 7. Regarding those provided under the separation plate 7,
The symbol "A" is replaced with "B" and the same name and the same number are used.

The horizontal bracket 11B is fixed to the arm of the sewing machine body under the table 1, and the vertical bracket 16B.
B, convex rail 17B, concave rail 18B, vertical air cylinder 19B, piston rod 20B, cover member 21B,
The pulley B, the belt 24B, the feed motor 25B, and the feed roller 26B are vertically symmetrical with the one on the separation plate 7 with the separation plate 7 as the center plane. In addition, the feed roller 2
6B is exposed from the opening 1a provided in the table 1 and can come into contact with the lower surface of the separating plate 7, so that the sewing target B can be slipped and sent to the separating plate 7. You can do it.

The feed rollers 26A and 26B can feed the sewing products A and B in the same direction as the feeding direction of the sewing products A and B by the feed ring 5. Moreover, the positions of the feed rollers 26A and 26B are positions having a deviation in the orthogonal component with respect to the feed direction of the feed ring 5. Therefore,
For the feed speed of the feed roller 5, the feed rollers 26A, 26
If the feed rate of B is increased, inward curve inward curve sewing can be performed, and conversely, if it is decreased, outward curve out curve curved sewing can be performed.

It is desirable that the feed directions of the feed rollers 26A and 26B are completely parallel to the feed direction of the feed burr 5, but when the special sewing objects A and B are sewn, they are not necessarily parallel. Good. In addition, the feed roller 2
6A and 26B are usually arranged outside the presser bar 3 and needle bar 4, but when sewing special sewing objects A and B, they are provided inside, for example, on the back side or the front side of the head 2. Good.

In front of the presser bar 3 and the needle bar 4 on the table 1, four reflection type optical sensors are arranged vertically in two. Out of these, the upper and lower two sensors nearer to the outer side, that is, the feed rollers 26A and 26B are called outer side optical sensors 31A and 31B, and the two sensors on the opposite side are called inner side optical sensors 32A and 32B. These outside light sensors 31
The sensor line between A, 31B and the inner optical sensors 32A, 32B is slightly displaced inward from the stitching line of the needle 4a. This misalignment corresponds to the seam allowance of the objects to be sewn A, B.

The outer light sensor 31A and the inner light sensor 32A are for detecting the edge of the upper sewing object A, and the outer light sensor 31B and the inner light sensor 32.
B is for detecting the edge of the lower sewing object B. Unless the outer photosensors 31A / 31B are covered by the sewn product A / B and the inner photosensors 32A / 32B are covered by the sewn product A / B, the feed speed of the feed rollers 26A / 26B does not change. The material to be sewn A / B is the inner light sensor 32A.
If / 32B is also covered, the suture line is curved inward and the feed speed of the feed rollers 26A / 26B is increased. In addition, the material to be sewn A / B is the outer optical sensor 3
If it does not cover 1A / 31B, the feed roller 26A /
The feed speed of 26B becomes slow.

Further, the lower surface and the lower surface of the cover member 21A and 21
On the upper surface of B, start light sensors 33A and 33B are provided. The start light sensor 33A / 33B detects the edge of the sewing material A / B, and feed rollers 26A / 26B.
To move the sewing target A / B to a certain position. The sewing material A / B is the start light sensor 33A / 3
If it does not cover 3B, the above vertical air cylinder 19A
/ 19B operates and the feed rollers 26A / 26B move.

Outer light sensor 31B and inner light sensor 32
An end light sensor 34 is provided on the table 1 in front of B. The end light sensor 34 is for detecting the end of the sewing objects A and B and automatically ending the sewing. Two end light sensors 34 may be provided above and below the sewing objects A and B, and only one of the start light sensors 33A and 33B may be provided. Also, the end light sensor 34, the start light sensors 33A, 33B,
Outer light sensors 31A, 31B and inner light sensor 32A,
The position where 32B is provided is not limited to the above position.

2. Overall Circuit FIG. 2 shows the entire control circuit provided in the sewing machine. The start switch 41 is a switch for operating the circuit of the entire sewing machine, and the stop switch 42 is a switch for stopping this operation. The ON state of the start switch 41 and the stop switch 42 is detected by the switch circuit 43, and the input interface 44
Is sent to the CPU 51 as an on-event signal via. The foot switch 47 is a switch for actuating / stopping the entire sewing device, and is turned on / off for each operation.
Repeatedly turned off.

The outside light sensors 31A and 31B, the inside light sensors 32A and 32B, and the start light sensors 33A and 33.
B, the detection signal of the end light sensor 34 is the sensor circuit 46.
Is converted into detection data by and is sent to the CPU 51 via the input interface 44. This detection data is a set of data "1" when the sewing objects A and B are detected and "0" when they are not detected. The signal from the rotary encoder of the rotary encoder circuit 35 is the advance counter 3
6 is counted, and this count data is the advance needle data I
N as a CPU via the input interface 44
Sent to 51. The advance counter 36 can be cleared by the CPU 51. The rotary encoder circuit 3
The rotary encoder 5 is connected to a pulley (not shown) in the sewing machine, and the number of times the needle 4a is driven is detected by this.

The ROM 52 stores a program corresponding to the flow chart described later and executed by the CPU 51, and a program corresponding to other processing. RA
In M53, various data processed by the CPU 51, the CPU
Various data necessary for 51 to perform processing are stored.

The feed control data PC for driving the feed motors 25A and 25B is data indicating the number of pulses. This feed control data PC is sent from the CPU 51 via the output interface 48 to the drive circuits 56A, 56A.
Sent to B. The rotation data F / B of forward rotation (forward) / reverse rotation (back) of the feed motors 25A and 25B is
From the CPU 51, via the output interface 48
It is sent to the distribution circuits 57A and 57B.

In the drive circuits 56A and 56B, the step pulse signal SP having the number of pulses corresponding to the sent feed control data PC is generated in every constant cycle, and the distribution circuits 57A and 5B.
Sent to 7B. The step pulse signal SP is converted by the distribution circuits 57A and 57B into distribution pulse signals according to the order of excitation, and further amplified by the excitation circuits 58A and 58B to a signal for exciting the windings of the feed motors 25A and 25B. And sent to the feed motors 25A and 25B.

Further, the start / stop drive data DR of the sewing motor 6 and the forward / reverse (back) rotation data F / B are supplied from the CPU 51 via the output interface 48 to the motor drive circuit. 49
Sent to By driving the sewing motor 6, the sewing objects A and B are sewn together. The reverse rotation of the sewing motor 6 causes reverse stitching of the workpieces A and B. The sewing motor 6 is a DC servo motor and rotates at a constant speed.

Further, the horizontal air cylinders 14A, 14
B, standby data SB for movement / return of vertical air cylinders 19A, 19B, and downward movement / return from CPU 51
It is sent to the solenoid driver circuit 59 via the output interface 48, and the air valve solenoids 60A, 6A
0B, 61A, 61B are on / off controlled.

When the air valve solenoids 60A and 60B are ON-controlled, the air valve (not shown) is switched and the piston rods 15A and 15B of the horizontal air cylinders 14A and 14B are pushed out. When the air valve solenoids 60A and 60B are turned off, the air valves are switched again and the piston rods 15A and 15B of the horizontal air cylinders 14A and 14B are pushed back. Further, when the air valve solenoids 61A and 61B are ON-controlled, the air valves are switched and the vertical air cylinders 19A and 1A are switched.
The 9B piston rods 20A and 20B are pushed out.
When the air valve solenoids 61A and 61B are turned off, the air valve is switched again and the vertical air cylinder 1
The piston rods 20A and 20B of 9A and 19B are pushed back.

The sewing motor 6 may be a step motor. The circuit of FIG. 2 is further provided with a power switch (not shown), and when the switch is turned on, power is supplied to each circuit of FIG.

The presser solenoid 62 is connected to the presser bar 3 and moves the presser bar 3 and the presser bar 3a up and down. The drive data D / U for the downward movement / return of the presser solenoid 62 is sent from the CPU 51 to the solenoid driver circuit 59 via the output interface 48.
The presser solenoid 62 is driven. Further, the thread cutting solenoid 64 is connected to a thread cutting cutter (not shown) and moves the thread cutting cutter to cut the upper thread and the lower thread at the end of the sewing. The cutter data KT for driving the thread cutting solenoid 64 is sent from the CPU 51 to the solenoid driver circuit 59 via the output interface 48, and the thread cutting solenoid 64 is driven.

3. Drive Circuits 56A and 56B FIG. 3 shows the drive circuits 56A and 56B. The pulse generation circuit 71 generates a pulse signal having a frequency according to the feed speed data, which is sent from the CPU 51 via the speed latch 77. This pulse signal is sent as the step pulse signal SP to the distribution circuits 57A and 57B via the AND gate 72. On the other hand, the CPU 51
The above-mentioned feed control data PC from is set in the feed latch 73 and sent to the comparator 74. Further, the step pulse signal SP is input to the sending counter 75 and counted, and the count data is sent to the comparator 74.

When the count data of the step pulse signal SP coincides with the feed control data PC, the coincidence signal is sent to the flip-flop 76 as the reset signal R. The output signal Q of the flip-flop 76 is sent to the AND gate 72 as an opening signal. Therefore, the step pulse signal SP is sent by the number of pulses corresponding to the sending control data PC. The flip-flop 7
A clock signal φ is sent to 6 as a set signal S. The cycle of the clock signal φ is relatively long and is 1 to 5
Seconds. Therefore, for each cycle of this clock signal φ,
The step pulse signal SP is the feed control data P.
The number of pulses corresponding to C is sent.

From the CPU 51 to the distribution circuits 57A, 57 described above.
To B, forward rotation (forward) / reverse rotation (back)
The rotation data F / B of is sent via the forward / reverse latch 78,
The rotation directions of the feed motors 25A and 25B are switched. The pulse generation circuit 71 may generate a pulse signal having a constant frequency regardless of the feed speed data.

When the value of the feed control data PC is changed,
Since the number of pulses of the step pulse signal SP that is output at every constant cycle of the clock signal φ changes, as a result, the rotation speeds of the feed motors 25A and 25B change as a whole, and the feed speeds of the feed rollers 26A and 26B also change. change. In this case, the frequency itself of the step pulse signal SP has not changed. The feed control data PC may be sent to the pulse generation circuit 71 to change the rotation speeds of the feed motors 25A and 25B. Further, the drive circuits 56A, 56
As B, a circuit capable of switching start / stop and acceleration / deceleration may be used. This circuit is
The maximum speed is reached by instructing acceleration, and the minimum speed is reached by instructing deceleration. This maximum speed / minimum speed can be set by controlling a variable resistor in the circuit.

4. Sewing Control Process FIGS. 4 and 5 show flowcharts of the sewing control process executed by the CPU 51. This process starts when the foot switch 47 is turned on. Before the foot switch 47 is turned on, the articles to be sewn A and B are usually set so as to sandwich the separation plate 7. In this process, the feed control data PC is the stop PC of "00 ... 0".
A normal speed PC with a feed rate of 0 and 5
n, and three higher values of high speed PCh. Of course, other types may be used.

In this processing, the down standby data S
B is sent to output interface 48 (step 0)
1). As a result, the piston rods 20A and 20B are pushed out from the vertical air cylinders 19A and 19B, and the feed rollers 26A and 26B are sewn on the separation plate 7 by the sewing objects A and B.
Abut on each other. Then, the CPU 51 determines whether or not the detection data from the start light sensor 33A is "1", that is, whether or not the workpiece A reaches the corresponding position of the feed roller 26A (step 02). If the detected data is "0" and the material A to be sewn has not reached the corresponding position of the feed roller 26A, standby data SB for movement is sent to the output interface 48 (step 03). As a result, the piston rod 15A is pushed out from the horizontal air cylinder 14A, and the feed roller 26A moves toward you. In this way, the feed roller 26A automatically moves to a position where the material to be sewn A is present.

Further, the CPU 51 determines whether or not the detection data from the start light sensor 33B is "1", that is, whether or not the material to be sewn B has reached the corresponding position of the feed roller 26B (step 04). . If the detected data is "0" and the workpiece B has not reached the corresponding position of the feed roller 26B, the standby data SB for movement is sent to the output interface 48 (step 05). As a result, the piston rod 15B is pushed out from the horizontal air cylinder 14B, and the feed roller 26B moves forward. In this way, the feed roller 26B automatically moves to the sewing target B.
Move to the position with.

Next, the downward drive data D / U is sent to the solenoid driver circuit 63 via the output interface 48 (step 06). As a result, the work clamp solenoid 62 is actuated, and the work pieces A and B are pressed by the work clamp 3
Pressed by a. Then, the RAM 53, the interfaces 44 and 48, the counters 36 and 75, and the latch 7
Initialization processing such as clearing of steps 3 and 77 is performed (step 07).

Next, the start drive data DR and the reverse rotation rotation data F / B are sent to the motor drive circuit 49 via the output interface 48 (step 11), and the feed control data PC and the reverse speed PCn for the normal speed PCn are sent. The rotation rotation data F / B is sent to the drive circuits 56A and 56B and the distribution circuits 57A and 57B via the output interface 48 (step 12). As a result, the sewing motor 6 and the feed motors 25A and 25B rotate in the reverse direction, reverse stitching of the workpieces A and B is performed, the rotary encoder of the rotary encoder circuit 35 rotates, and the advancement data IN of the advancement counter 36 is rotated. Is incremented.

When the advance needle data IN reaches a predetermined value, for example "5" for 5 stitches (step 13), the stop drive data DR is sent to the motor drive circuit 49 via the output interface 48 (step 14). ), The feed control data PC of the stop PC0 is sent to the drive circuits 56A and 56B via the output interface 48 (step 1).
5). As a result, the sewing motor 6 and the feed motor 25
A and 25B are stopped, and reverse stitching of the workpieces A and B is completed.

Next, the start drive data DR and the normal rotation data F / B are sent to the motor drive circuit 49 via the output interface 48 (step 21).
The feed control data PC of the normal speed PCn and the rotation data F / B of the normal rotation are sent to the drive circuits 56A and 56B and the distribution circuits 57A and 57B via the output interface 48 (step 22). As a result, the sewing motor 6 and the feed motors 25A and 25B are rotated in the forward direction, and the sewing objects A and B are
Is sewn, the rotary encoder of the rotary encoder circuit 35 is rotated, and the advancement data IN of the advancement counter 36 is incremented.

Then, it is judged whether or not the detection data from the inner side optical sensor 32A is "1", that is, whether the sewing object A also covers the inner side optical sensor 32A (step 23). If the detection data is "1" and the sewn object A has an in-curved inwardly curved edge, the feed control data PC of the high speed PCh is sent to the feed latch 73 via the output interface 48 (step 24). As a result, the rotation speed of the feed motor 25A increases, and
As shown in (3), the stitching line can be an incurve along the edge of the material to be sewn.

Further, it is judged whether or not the detection data from the outer side optical sensor 31A is "0", that is, whether the sewing object A is also dislocated from the outer side optical sensor 31A (step 25). The detected data is "0", and the sewing product A
If the edge of the out curve is an outward curve, the stop PC
The feed control data PC of 0 is sent to the feed latch 73 via the output interface 48 (step 26). As a result, the rotation of the feed motor 25A is stopped, and
As shown in (1), the stitching line can be an outcurve along the edge of the workpiece.

Next, it is judged whether the detection data from the inner side optical sensor 32B is "1", that is, whether the sewing object B also covers the inner side optical sensor 32B (step 27). If the detection data is "1" and the sewn object B has an in-curved inwardly curved edge, the feed control data PC of the high speed PCh is sent to the feed latch 73 via the output interface 48 (step 28). This increases the rotation speed of the feed motor 25B,
As shown in (3), the stitching line can be an incurve along the edge of the material to be sewn.

Further, it is judged whether or not the detection data from the outer side optical sensor 31B is "0", that is, whether or not the material to be sewn B is also displaced from the outer side optical sensor 31B (step 29). The detected data is "0", and the sewing product B
If the edge of the out curve is an outward curve, the stop PC
The feed control data PC of 0 is sent to the feed latch 73 via the output interface 48 (step 30). As a result, the rotation of the feed motor 25B is stopped, and
As shown in (1), the stitching line can be an outcurve along the edge of the workpiece.

The processing in steps 23 to 30 described above is
This is repeated until the detection data of "1" is sent from the end light sensor 34 (step 31). This allows
Even if the direction and shape of the sewn products A and B change due to the progress of sewing, the positions and rotation speeds of the feed rollers 26A and 26B are controlled each time, and the sewn products A and B having complicated shapes are automatically formed. Can be sewn together.

If the detection data of "1" is sent from the end light sensor 34 (step 31), the advance counter 3
6 is cleared (step 32), and the process proceeds to standby until the advance needle data IN reaches a predetermined value, for example, "8" for 8 stitches (step 33). The “8” for eight needles is a value corresponding to the distance between the needle 4a and the end light sensor 34, and the value changes if this distance changes. When the advance hand data IN becomes "8" (step 33), the stop drive data DR is sent to the motor drive circuit 49 via the output interface 48 (step 34), and the feed control data P for the stop PC0 is sent.
C drives the drive circuit 56 via the output interface 48.
A, 56B is sent (step 35). This allows
The sewing motor 6 and the feed motors 25A and 25B are stopped,
The sewing is performed up to the end of the workpieces A and B.

Next, the advance counter 36 is cleared (step 41), and the start drive data DR and the reverse rotation rotation data F / B are sent to the motor drive circuit 49 via the output interface 48 (step 42). ), The feed control data PC of the normal speed PCn and the rotation data F / B of the reverse rotation are sent to the drive circuits 56A and 56B and the distribution circuits 57A and 57B via the output interface 48 (step 43). As a result, the sewing motor 6 and the feed motors 25A and 25B rotate in the reverse direction, reverse stitching of the workpieces A and B is performed, the rotary encoder of the rotary encoder circuit 35 rotates, and the advancement data IN of the advancement counter 36 is rotated. Is incremented.

When the advance needle data IN reaches a predetermined value, for example, "5" for five stitches (step 44), the stop drive data DR is sent to the motor drive circuit 49 via the output interface 48 (step 45). ), The feed control data PC of the stop PC0 is sent to the drive circuits 56A and 56B via the output interface 48 (step 4).
6). As a result, the sewing motor 6 and the feed motor 25
A and 25B are stopped, and reverse stitching of the workpieces A and B is completed.

Then, the cutter data KT is sent to the solenoid driver circuit 65 via the output interface 48 (step 47). As a result, the thread cutting solenoid 64 is driven and the thread cutting cutter cuts the upper thread and the lower thread. Next, the return standby data SB is sent to the output interface 48 (step 48). As a result, the piston rods 15A and 15B of the horizontal air cylinders 14A and 14B are pushed back and the piston rods 20A and 20B of the vertical air cylinders 19A and 19B are pushed back.
Is pushed back, and the feed rollers 26A and 26B are returned to their original positions.

Finally, the return drive data D / U is sent to the solenoid driver circuit 63 via the output interface 48 (step 49). As a result, the presser foot solenoid 62 is stopped, and the presser foot 3a is sewn on the workpiece A,
Leave B. When the foot switch 27 is turned off, the above process is interrupted and the sewing motor 6 and the feed motors 25A and 25B are stopped in steps 45 and 46.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the feed rollers 26A, 26 in steps 02 to 05 described above.
The moving process of B may be performed in the curve / straight line sewing process of steps 23 to 30. Also, this step 0
The processes of 2 to 05 and 23 to 30 are the same as those of steps 13 and 3 above.
Even in the standby process of reverse stitching of 3 and 44, and end stitching,
Also, the feed control data PC may be a stop PC.
Values other than the three types of 0, normal speed PCn, and high speed PCh may be further taken. Further feed motors 25A, 2
The feed direction of 5B may be different from the feed direction of the feed ring 3a. Thereby, the curvature of the stitching line can be variously changed. In this way, in order to change the curvature of the stitching line variously, the outer photosensors 31A and 31B and the inner photosensors 32A and 32B are respectively formed in a plurality of rows, and are switched according to the content of the detection data from the sensors in each row.

In addition, the sewing control processing of FIGS. 4 and 5 is control by a microcomputer, but part or all of this processing can be changed to sequence control. Further, the outside light sensors 31A and 31B, the inside light sensors 32A and 32B, the start light sensor 33, and the end light sensor 34 can be slid outward or inward, and can be flexibly adapted to changes in the shapes of the workpieces A and B. You may be able to correspond. Further, the start light sensors 33A, 33
B may be a plurality of groups, and the movement amount of the feed rollers 26A and 26B may be controlled in a plurality of stages. Furthermore,
Feed rollers 26A, 26B, feed motors 25A, 25B
May be provided in three or more sets, and the number of needles 4a may be two or more.

In addition, the shapes of the edges of the sewn objects A and B do not have to be the same, and it is particularly effective when one edge is outcurved and the other edge is incurved. In this case, the objects to be sewn A and B are swelled in three dimensions after the sewing. Also, as the sewn objects A and B, thick cloths for vehicle seats are suitable, but not limited to this, and thick or thin cloths may be used. Further, the materials of the sewing products A and B are
In addition to cloth, leather or urethane may be used, or thick urethane or cloth may be sandwiched under the material to be sewn A,
The application may be any sewn product such as furniture such as chairs, sofas, beds, curtains and carpets, clothing (apparel) such as shirts, suits, coats and jackets, personal items such as hats, shoes and bags. The sewn object may be one piece or three pieces or more, and the sewing includes embroidery, tufting, etc. in addition to the sewing.

In addition, the feed rollers 26A and 26B are
As long as it is possible to feed the objects to be sewn A and B, such as the same as the feeding blade 5, a rubber belt and a roller, any material may be used. Further, the present invention is not limited to the sewing machine and can be applied to all devices capable of sewing. This sewing also includes high-frequency adhesive stitching without using threads.

[0059]

As described above in detail, according to the present invention, the second sewn product is located at a position having a deviation in a component orthogonal to the feed direction of the sewn product by the first sewn product feeding mechanism. The feed mechanism feeds the sewn object in the same direction, and according to the edge detection result of the sewn object, the speed at which the sewn object is fed by the first sewn object feeding mechanism and the second sewn object The speed at which the sewn product is fed by the sewn product feeding mechanism is controlled to be different. Therefore, if the feed speed of the second work feed mechanism is faster than the feed speed of the first work feed mechanism, curved sewing can be made into an out-curve curved inward, and conversely slow. For example, the curved stitch can be an incurve curved outward. As a result, even if the edges of the material to be sewn have a complicated shape, it is possible to automatically and easily sew together.

[Brief description of drawings]

FIG. 1 is an overall external view of a sewing device.

FIG. 2 is a circuit diagram provided in the sewing device.

FIG. 3 is a circuit diagram showing a drive circuit 56A (56B).

FIG. 4 is a diagram showing a flowchart of sewing control processing executed by a CPU 51.

FIG. 5 is a diagram showing a flowchart of sewing control processing executed by a CPU 51.

FIG. 6 is a diagram showing an example of curved / straight stitching.

[Explanation of symbols]

1 ... table, 1a ... opening, 2 ... head, 3 ... presser bar,
3a ... presser foot, 4 ... needle bar, 4a ... needle, 5 ... feed,
6 ... Sewing motor, 7 ... Separation plate, 8 ... Spacer, 11A,
11B ... horizontal brackets, 12A, 12B, 17A, 1
7B ... Convex rail, 13A, 13B, 18A, 18B ... Concave rail, 14A, 14B ... Horizontal air cylinder, 15A,
15B ... Piston rod, 16A, 16B ... Vertical bracket, 19A, 19B ... Vertical air cylinder, 20A, 2
0B ... piston rod, 21A, 21B ... cover member,
22A, 22B, 23A, 23B ... Pulleys, 24A, 2
4B ... Belt, 25A, 25B ... Feed motor, 26A,
26B ... Feed roller, 31A, 31B ... Outside optical sensor,
32A, 32B ... Inner light sensor, 33A, 33B ... Start light sensor, 34 ... End light sensor, 35 ... Rotary encoder circuit, 36 ... Advance counter, 41 ... Start switch, 42 ... Stop switch, 43 ... Switch circuit, 44 … Input interface, 46… Sensor circuit,
47 ... foot switch, 48 ... output interface,
49 ... Motor drive circuit, 51 ... CPU, 52 ... ROM,
53 ... RAM, 56A, 56B ... Drive circuit, 57A, 5
7B ... Distribution circuit, 58A, 58B ... Excitation circuit, 59 ... Solenoid driver circuit, 60A, 60B, 61A, 61
B ... Air valve solenoid, 62 ... Pressing solenoid, 6
4 ... Thread trimming solenoid, 71 ... Pulse generating circuit, 73 ...
Feed latch, 74 ... Comparator, 75 ... Feed counter, 77 ... Speed latch, A, B ... Sewing object.

Claims (4)

[Claims] 1. A first sewn object feeding mechanism for feeding a sewn object, a sewing mechanism for sewn the sewn object near the first sewn object feeding mechanism, and the first sewn object. At the position where there is a deviation in the orthogonal component with respect to the feed direction of the work to be sewn by the material feed mechanism, the sewn product is moved in a direction substantially the same as the feed direction of the sewn product of the first sewn material feed mechanism. A second workpiece feeding mechanism for feeding, a detecting means for detecting an edge of the workpiece to be fed, and a sewing article for the first workpiece feeding mechanism according to a detection result of the detecting means. Speed control means for controlling the first sewn product feeding mechanism or the second sewn product feeding mechanism so that the feeding speed is different from the sewn object feeding speed of the second sewn material feeding mechanism. And a sewing device. 2. The second sewn object feeding mechanism comprises a plate located between two sewn objects and a mechanism for pressing and feeding the two sewn objects against the plate from above and below. The sewing device according to claim 1, wherein: 3. The second sewn article feeding mechanism has means for detecting the sewn article, and the second sewn article feeding mechanism is responsive to the detection result of the detecting means. 2. The sewing device according to claim 1, wherein the sewing device moves to a position where the material to be sewn is located. 4. The sewing apparatus according to claim 1, wherein an edge of the article to be sewn detected by the detecting means is substantially on an extension of a stitching line of the article to be sewn.