JPS6312637B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention provides a sewing machine, in particular, a sewing machine in which a pair of cloth feed teeth is provided at the front and rear of the sewing machine, and the feed amount of the front and rear feed dogs is changed. The present invention relates to a method for creating data on the amount of unevenness in a sewing machine that can perform the following steps.

(Prior Art) Conventionally, in this type of sewing machine, when performing crisscross stitching on a workpiece cloth, for example, it was necessary to change the feed amount of the main feed dog and the sub feed dog during sewing. Therefore, it required skill to operate.

Also, when using a lockstitch sewing machine or the like to sew the fabric, loosen the thread tension of the sewing machine, sew the fabric, pull the thread after sewing, remove the stitches, and use an iron to sew. I found a way. However, this method required a large number of work steps, resulting in poor work efficiency.

In order to solve these problems, the cam is mechanically linked to the swinging lever that gives feed motion to the feed dog, and the swing angle of the lever is adjusted to allow the main feed dog and sub feed dog to move. Conventionally, methods have been proposed in which the processed cloth is automatically skewed by changing the amount of cloth feed. but,
In this conventional configuration, for example, FIGS.
As shown in the figure, if you want to change the ratio of sagging in each sewing area A to F of the work cloth K (hereinafter referred to as the sagging amount), you must replace each cam with a cam with a predetermined sagging amount. There was a defect that reduced work efficiency. Moreover, in order to make it possible to perform serration stitching with any serration amount, a large number of cams corresponding to each serration amount are required, resulting in a very complicated problem.

In order to solve this problem, it is conceivable to not use the cam but to automatically control each feed amount of the front and rear cloth feed teeth by a control device according to the number of stitches.

In this case, if the amount of set-up in each of the sewing areas shown in FIGS. 1 and 2 is different, a step will be formed between adjacent sewing areas due to the difference in the amount of set-up, and A problem arises in which the sewing transitions are not finished neatly.

Purpose The purpose of this invention is to solve the above problems.
When the control device automatically controls the feed amount of the front and rear cloth feed dogs according to the number of stitches, when the sewing area is divided into multiple sections, the Distributing the amount of setback amount data, and based on the distributed amount of setback amount data, create intermediate amount of setback amount data so that the level difference in the size of the amount of setback amount data of each adjacent section is eliminated. To provide a method for creating data on the amount of unevenness by which even non-experts can easily and neatly sew.

(Embodiment) Hereinafter, an embodiment of a sewing machine embodying the present invention will be described based on the drawings.

In FIG. 3, a sewing machine 1 is fixedly mounted on a table 3 with a start switch 2 disposed at the lower right side, and its sewing needle 4 cooperates with a double ring looper (not shown) to form a stitch forming mechanism. , a double chain stitch is formed on the work cloth K. The needle plate 5, which has a needle hole through which the sewing needle 4 passes, forms a work cloth support surface by its upper surface and the upper surface of the table 3, and a main feed dog 6 and a sub feed dog 7 are provided on the work cloth support surface. are becoming more common. The main and auxiliary feed dogs 6 and 7 are workpiece cloth feeding devices for feeding the workpiece cloth K in one direction in cooperation with a presser foot (not shown) attached to the tip of the presser arm 8. It consists of

A servo sensor 10 is attached to the support arm 9 disposed on the cloth feeding side of the sewing machine 1 so as to be located above the throat plate 5.
0 consists of a light emitting element 10a such as a light emitting diode and a light receiving element 10b such as a phototransistor. It is now being detected. And this reflector 11
The side edge Ka of the work cloth K passing above blocks part of the light from the light emitting element 10a, and the light receiving element 10b detects the side edge Ka of the work cloth K according to the amount of light received. There is. The main feed pipe 6, the main feed table 21, etc. constitute a main feed device, and the sub feed dog 7, the sub feed table 22, etc. constitute a sub feed device.

On the cloth feeding side of the throat plate 5, a part of a rotary wheel 12 is projected onto the work cloth support surface so as to engage with the work cloth K, and the rotary wheel 12 is fixed to the lower surface of the table 3. installed servo motor (5th
(See figure) It is fixed to the motor shaft of the SM and rotates around an axis that is approximately parallel to the direction in which the workpiece cloth K is fed. When the servo sensor 10 detects that the side edge Ka of the workpiece cloth K is aligned with the center line of the reflector 11, the servo motor SM is controlled to stop, and the side edge Ka of the workpiece cloth K is controlled to stop.
When Ka is displaced left and right with respect to the center line,
The servo motor SM is controlled to rotate forward or reverse, and the rotating wheel 12 moves the workpiece cloth K to its side edge.
The drive is controlled so that Ka is located on the central axis of the reflecting plate 11.

A pressure roller 13 is attached to the tip of a support lever 15 rotatably supported by a support 14 on the table 3 so as to correspond to the rotation ring 12.
An air cylinder (see FIG. 5) connected to the rear end of the support lever 15 is moved up and down by the up and down movement of the piston rod 16 of the PS. and,
When the press roller 13 processes, it cooperates with the rotary wheel 12 to clamp the work cloth K, moves the work cloth K in the lateral direction perpendicular to the cloth feeding direction, that is, left and right, and the press roller When 13 rises,
The pressure on the work cloth K is released.

Next, the cloth feeding mechanism of the main feeding dog 6 and the sub feeding dog 7 provided on the lower surface of the table 3 will be explained.

As shown in FIG. 4, the main feed dog 6 and the sub feed dog 7 are connected to a main feed table 21 and a sub feed table 22, respectively.
It is fixed to the tip of the A feed guide sesame 24, which is rotatably attached to a guide shaft 23, is fitted into the two prongs at the rear ends of both the feed tables 21, 22 so as to be able to move relative to the feed tables 21, 22 in the longitudinal direction. An eccentric cam 26 for vertical feeding on a sewing machine main shaft 25 driven by a sewing machine motor (see FIG. 5) MM is fitted into the recessed portion of the lower surface via an eccentric ring holder 27. Therefore, as the main shaft 25 of the sewing machine rotates, the vertical feed eccentric cam 26 moves eccentrically, and the main and sub feed teeth 6, 7 are both moved vertically in synchronization.

Next, we will explain the back-and-forth movement of the main and sub-feed dogs 6 and 7, that is, the swing mechanism in the feed direction that determines the feed amount of the work cloth. Just by fixing the
Since it is basically the same as the sub-feed dog 7, only the feeding mechanism of the sub-feed dog 7 will be described below.

Eccentric cam 28 for forward and backward feeding shown by the two-dot chain line in Fig. 4
is fixed to the main shaft 25 of the sewing machine, and the proximal end of the rod 29 is connected to its outer cam surface. On the other hand, the tip of the rod 29 is connected by a shaft 32 to the tip of a swinging arm 31 fixed to a swinging shaft 30. Therefore, when the main shaft 25 of the sewing machine is rotated, the rod 29 is reciprocated by the eccentric cam 28 for forward and backward feeding, and the rod 29 is moved back and forth through the swing arm 31 to the swing shaft 30.
is rotated back and forth within a predetermined rotation range. The arc-shaped sending arm 33 is fixed to the swing shaft 30 at its base end, and is rotated back and forth as the swing shaft 30 rotates back and forth.

The pulse motor PM is driven in forward and reverse directions by a drive signal from a control circuit to be described later, and its drive shaft is drivingly connected to an adjustment shaft 36 via gears 34 and 35. The adjustment lever 37 is fixed to the adjustment shaft 36 at its base end, and the adjustment link 38, which is rotated by the drive of the pulse motor PM, is connected to the adjustment lever 37 by a pin at its lower end. It is rotatably connected to the tip of the lever 37.
The distal end of the feed arm 33 is fitted into the through-fitting hole 39a of the sliding block 39, and the distal end of the adjustment link 38 is rotatably connected to one side thereof by a shaft pin 40. There is. A link 42 is rotatably attached at one end to multiple sides of the sliding block 39,
The other end is connected to the sub-feed table 22 by the shaft pin 41.
is rotatably connected to the central side wall of the

Therefore, as the swing shaft 30 rotates, the feed arm 3
The sliding block 39 is moved back and forth through the link 4.
2, the sub-feed table 22 is reciprocated in its longitudinal direction, that is, in the cloth feeding direction. Now, when the pulse motor PM is driven forward in the direction of the arrow, the adjustment shaft 36, the adjustment lever 37, the adjustment link 3
8 etc., the sliding block 39 is moved up and down and engaged near the tip of the feed arm 33, so the range in which the sliding block 33 is driven becomes large, and the sub-feeding The cloth feed amount of tooth 7 increases.
Conversely, when the pulse motor PM is reversely driven in the opposite direction of the arrow, the sliding piece 39 moves against the adjustment link 38.
Since the sliding piece 39 is moved by and engaged near the base end of the feeding arm 33, the range in which the sliding piece 39 is driven becomes smaller, and the cloth feeding amount of the sub-feeding dog 7 becomes smaller.

Therefore, the main feed dog 6 has a fixed cloth feed amount.
On the other hand, the cloth feed amount of the sub-feed dog 7 is controlled by the pulse motor.
By driving and controlling the PM, it can be changed as appropriate, and the work cloth K can be skewed.

Next, during the period from starting sewing from sewing area A of work cloth K shown in FIG. In sewing areas B and F, regular hem stitching can be performed in sewing areas B and F. (The feed amount of the main feed dog 6 and the sub feed dog 7 are the same)
A control device for driving and controlling the sewing machine 1 so that the following steps can be performed continuously will be described. In addition,
There is a sewing area U in the sewing area B of the processed cloth K.
There is a seam allowance in the seam area U.
There is a seam allowance area P that overlaps with Kb, and a part of the seam allowance Kb protrudes from the side edge Ka of the processed cloth K.

Now, the control device uses the table 3 shown in FIG.
The control box CB is located at the back right of the screen, and on the left side of the control box are five memory select switches MS1, MS2, and MS that interlock with each other.
3, MS4, and MS5 are provided. and,
These 5 memory select switches MS1 to MS
5 is a process that requires the microcomputer MC (described later) built into the control box CB in collaboration with the mode select switch MSS (described later) to each sewing area A to F with different sewing methods, seam and seam allowance areas U and P. For cloth K,
Each area A~ in five sewing patterns (for example, sewing patterns for men, women, children, etc.)
If you want to program the number of stitches (hereinafter referred to as the number of stitches) and sagging amount data for F, U, and P, select one of the five sewing pattern programs and run sewing machine 1 according to that program. Selection operation is performed when driving with

Six correction switches SWA, SWB, and
SWC, SWD, SWE, and SWF are digital switches, and each of them increases or decreases the offset amount data corresponding to each of the sewing areas A to F of the programmed work cloth K, and each area A to F can be adjusted to an arbitrary value. It is designed so that it can be sewn with a certain amount of unevenness. Therefore, for example, if you want to correct the programmed data on the amount of unevenness in sewing area A (without erasing the programmed amount of unevenness from the program), press the unevenness correction switch.
This is possible by operating SWA.

The open area correction switch SWU, which is installed above the skew correction switch SWA, is a digital switch that increases or decreases the preprogrammed stitch count data in the sewing area U located within the sewing area B, as shown in Fig. 1. correct,
The sewing area U of the work cloth K can be sewn.

The total stitch count correction switch SWT installed on the right side of the open area correction switch SWU is composed of a digital switch, and adjusts the number of stitches in each of the previously programmed sewing areas A to F to a predetermined ratio to the total number of stitches. Each programmed area A to F is converted based on the ratio.
The work cloth K can be sewn by converting and correcting the number of stitches data or data on the amount of skewing.

On the other hand, the data selector switch DSS installed at the center of the front right side of the control box CB consists of a digital switch, and is used to set the number of stitches and the amount of offset data for each sewing area A to F, seam and seam allowance areas U and R. It's summery.
Each time the data input switch INS on the left side is pressed, the data on the number of stitches and the setting amount set by the data selector switch DSS is programmed into the microcomputer MC, which will be described later. The data values are displayed on a display device DSP consisting of a segment display tube. In addition, the number of stitches indicator lamp L1 provided above the data input switch INS
The setting instruction lamp L2 is controlled to turn on alternately when stitch count data and setting amount data are sequentially programmed into the microcomputer MC.

The mode select switch MSS consists of a rotary switch and can be operated in 7 ways. When you want to program by operating the data select switch DSS and data input switch INS, or when you want to monitor the programmed program. be operated on.

In addition, when sewing the work cloth K according to the programmed program (hereinafter referred to as the first sewing), the mode selector switch MSS transmits the data of the offset amount of each of the programmed sewing areas A to F to each of the offset correction switches. When modifying and sewing based on the selection operation of SWA to SWF (hereinafter referred to as second sewing), the programmed stitch count data of each sewing area A to F is input to the selection operation of the total stitch count correction switch SWT. When sewing the work cloth K based on the converted number of stitches (hereinafter referred to as third sewing), each of the programmed sewing areas A to F
When converting the number of stitches data and data on the amount of unevenness into a predetermined ratio based on the total stitch number correction switch SWT, and sewing the work cloth K based on the converted number of stitches and data on the amount of unevenness ( (hereinafter referred to as 4th sewing), and corrects the set-up amount data of each of the programmed sewing areas A to F based on the set-up correction switches SWA to SWF, and adjusts the set stitch number data of each sewing area A to F. When converting the corrected set-up amount data to a predetermined ratio based on the total stitch number correction switch SWT and sew the work cloth K based on the number of stitches and set-up amount data (hereinafter referred to as fifth You can select from 5 types of sewing.

Next, the control circuit built into the control box CB will be explained.

In FIG. 5, a microcomputer MC includes a central processing unit (CPU), a read-only memory (ROM), and a readable and writable memory (Random Access).
It consists of RAM (Memory) and I/O port IOP. Each input terminal of the I/O board IOP has the above and mode select switches MS1 to
MS5, MSS, Ise-komi, open area and total stitch count correction switch SWA~SWF, SWU,
SWT, data select and data input switch
The output terminals of the DSS, INS, and start switch 2 are connected, and the output terminal of the I/O boat IOP is connected to a sewing machine drive circuit 51 that drives and controls the sewing machine motor MM, and a pulse pulse that drives and controls the pulse motor PM. a motor drive circuit 52, a cylinder drive circuit 53 that drives and controls the air cylinder PS;
The input terminals of a servo motor drive circuit 54 that drives and controls the servo motor SM, the stitch count indicator lamp L1, the offset indicator lamp L2, and a display drive circuit 55 that drives and controls the display device DSP are connected. Further, at the input terminal of the I/O port IOP, there is a needle position detector 56 that detects the needle position of the sewing needle 4 based on the rotation of the sewing machine main shaft 25, etc., and a needle position detector 56 that detects the needle position of the sewing needle 4 based on the rotation of the sewing machine main shaft 25, etc. The output terminal of a stitch number counter 57 that counts the number of stitches is connected.

Meanwhile, the readable and writable memory
For RAM, use the memory select switch MS1~
Based on the operations of MS5, data select switch DSS, and data input switch INS, sewing programs of five sewing patterns for workpiece cloth K are stored in memory, and the data on the amount of unevenness in each sewing area A to F of the sewing program are stored. Each driving rotation speed of the corresponding pulse motor is stored in memory.

Next, a method of using the sewing machine constructed as described above and its operation will be explained with reference to flowcharts of the control program of the microcomputer MC shown in FIGS. 6 to 10.

First, the sewing program (support program)
We will explain how to write the data into the readable and writable memory (hereinafter referred to as memory) RAM of the microcomputer MC.

Now, when the power supply switch (not shown) of the control circuit is pressed, various registers, flags, etc. are reset by the initialization routine 61 in the microcomputer MC. Next, when the operator first switches the mode select switch MSS to the program mode and presses the memory select switch MS1 of the five memory select switches MS1 to MS5, the memory select signal SGM1 of the memory select switch MS1 is transmitted via data.
is input and stored in the register, and the program signal of the mode select switch MSS
MSSP is input and stored in a register. Then, based on the program signal MSSP1, a check routine 62 determines whether the mode select switch MSS is present in the program.
Then, the program address shown in FIG. 7 is reached.

When the program address is reached, the central processing unit
Routine 6 for calculating the memory select signal SGMS1 of the memory select switch MS1 using the CPU
3. Store the calculated value in the register and select one of the five sewing patterns by pressing the memory select switch.
Routine 64 for instructing the address to write the sewing pattern program to memory RAM based on MS1
After passing through, it reaches PO1 address.

Then, the control program will be described below in order to sequentially store the predetermined number of stitches and sagging amount data for each area A to F, U, and P shown in Table 1 of the attached sheet at a predetermined address in the memory RAM. Routine 65 displays the sewing area in which data will now be input to the display device DSP based on the added contents of the display instruction register (in this case, since the display register is initially cleared, the display of the display device DSP is "A--") and the display drive circuit 5 sends a drive signal to turn on the stitch count indication lamp L1 and turn off the set-stitch indication lamp L2.
A routine 66 outputted in step 5 instructs the operator to input stitch count data for sewing area A. Further, the program moves to address PO2, and a routine 67 inputs the set mode selector signal MSSP and memory select signal SGMS1, a check routine 68 determines whether or not there is a change in the switching of both select switches MSS and MS1, and the data The loop continues through a check routine 69 for determining whether or not the select switch DSS and the data input switch INS have been operated, that is, whether or not the number of stitches for the sewing area A has been input, and then returning to the routine 67 again.

While continuing to go around this loop, when the operator sets the data select switch DSS to the number of stitches in the sewing area A of the work cloth K and then presses the data input switch INS, the operator exits the loop and selects the same data select switch. A routine 70 stores stitch count data based on the switch DSS at a predetermined address in the memory RAM, and displays the value of the stitch count data on the display device DSP for a predetermined time (for example, if the stitch count is 40, "A40" is displayed) (After a predetermined period of time, the numerical value disappears and becomes "A--") Routine 71
The memory RAM that stores the stitch count data
Store the data for the next sewing area A at the address next to the address (increment command).
A routine 72 is reached. Memory like this
When the stitch count data in sewing area A is stored at a predetermined address in the RAM, a routine 73 that determines whether the value of a display instruction register (to be described later) is 6 (in this case, it is cleared to 0) and the stitch The routine 74 causes the display drive circuit 55 to output a drive signal that turns off the number indicator lamp L1 and turns on the reset indicator lamp L2, and then moves to address PO3.

When moving to address PO3, routine 7 inputs the mode and memory select signals MSSP and SGMS1.
5. Mode and memory select switches MSS and MS based on the same select signals MSS1 and SGMS1
a check routine 76 for determining whether or not there is a switching change in data selection switch DSS;
Check routine 7 determines whether or not the data input switch INS has been operated, that is, whether or not the data of the offset amount for sewing area A has been input in this case.
7 and then returns to the routine 75 again.

Then, while the loop continues to rotate, the worker moves the data select switch DSS to the sewing area A of the processed fabric K.
When the data input switch INS is pressed next, the loop is exited and the data of the offset amount for the same sewing area A is stored in the memory RAM.
A routine 78 for storing the value of the data on the amount of loss is displayed on the display device DSP for a predetermined time (for example, if the amount of loss is 10, "A10" is displayed, and after a predetermined time, only the value disappears and "A10" is displayed. A-
-'') routine 79, a routine 80 for incrementing the address in the memory RAM, and a routine 81 for adding 1 to the display instruction register, and then returning to the PO1 address. And the Rutan 65
Based on the value of the display instruction register 81 added in , the display of sewing area B where data will be input next to the display device DSP (display of "B--")
At the same time, in routine 66, the number of stitches indicator lamp L1 is turned on, the setting indicator lamp L2 is turned off, the PO2 address is reached, and the program returns to PO2.
A large loop such as the address → PO3 address → PO1 address → PO2 address is repeated until the value of the display instruction register becomes 6.

Then, the operator operates the switches DSS and INS using the same operating procedure as when inputting the number of stitches and sagging amount data for sewing area A, and while continuing to go around this large loop, sewing is performed in order from sewing area B. As in the case of the sewing area A, the data on the number of stitches and the amount of criss-crossing up to area F are sequentially stored at predetermined addresses in the memory RAM.

The number of stitches and the amount of offset data for the sewing area F are stored in the memory RAM, that is, the loop is repeated 6 times.
When it reaches the PO1 address, the display instruction register displays "U--" in the stitching area U where the next data is to be input to the display device DSP, based on the value added to 6 in the display instruction register in the routine 61. ), and at the same time, in routine 66, the number of stitches display lamp L1 is turned on, and the setting indication lamp L is turned on.
2 is turned off, and then the operation moves on to storing the stitch count data of the sewing area U of the work cloth K in the memory RAM. Then, when the operator sets the data select switch DSS to the stitch count data and presses the data input switch INS to store the data at a predetermined address in the memory RAM, check whether the value of the display instruction register is 6 or not. A routine 73 for determining, a routine 82 for adding 1 to the display instruction register, and a routine 82 for adding 1 to the display instruction register, and the display device DSP based on the value of the display instruction register.
Then, the seam allowance area P for inputting data is displayed (display of "P--") and address PO4 is reached.

When the control program reaches address PO4, the control program uses the set mode and memory select signals MSS1,
A routine 84 for inputting SGMS1, and a check routine 85 for determining whether or not there is a switching change in both modes and memory select switches MSS and MS1 based on both select signals MSSP and SGMS1.
Then, the loop continues through which the data select switch DSS and the data input switch INS are operated to determine whether or not the stitch number data for the seam allowance area P has been stored in the memory RAM, and then returns to the routine 84 again.

While continuing to go around this loop, the operator sets the data select switch DSS to the number of stitches in the seam allowance area P of the workpiece cloth K, and then presses the data input switch INS. A routine 87 for storing stitch count data based on the above at a predetermined address in the memory RAM, and a routine 88 for displaying the value of the same stitch count data on the display device DSP for a predetermined period of time in the same manner as above.
After the predetermined time, the program returns to the main address through a routine 89 for clearing the display instruction register, and the operation of writing the sewing pattern program based on the memory select switch MS1 to the predetermined address in the memory RAM is completed.

Similarly, the other four memory select switches MS
By sequentially operating buttons 2 to MS5, sewing patterns based on the respective memory select switches are stored in the memory RAM as shown in Table 1 above.

Therefore, in this embodiment, five sewing pattern programs are stored in the memory RAM.

Then read and write memory as above
Based on the sewing program written to RAM,
The case of performing criss-cross stitching on the work cloth K will be explained.

First, we will explain the case (first sewing) in which the memory select switch MS1 is selected and sewing is performed based on the stitch count data and set-in data according to the program of the sewing program written in the memory RAM by the memory select switch MS1. do.

Now, with memory select switch MS1 pressed, the operator can press the mode select switch.
When the MSS is switched to the first sewing mode and the power supply switch (not shown) of the control circuit is pressed, the mode selection is performed from the initialization routine 61 to the check routine 62 as shown in FIG. Mode select signal output when switch MSS is switched to 1st sewing
The sewing address shown in FIG. 8 is reached through a check routine 90 that determines whether the select switch MSS is present on the monitor based on MSS1.

When the control program reaches the sewing address, the mode select signal MSS1 from the mode select switch MSS and the memory select switch MS1 are activated.
Routine 91 inputs the memory select signal SGM1 from both select switches MSS and MS.
The loop continues through a check routine 92 for determining whether or not the switch 1 has been changed, and a check routine 93 for determining whether or not the start switch 2 has been pressed, and then returning to the routine 91 again.

When the operator presses the start switch 2, the operator exits from the loop and goes through a routine 94 that calculates the memory select signal SGMS1, and then reaches a routine 95 that stores the calculated memory select signal SGMS1. Of the five sewing programs stored in , the sewing program based on memory select switch MS1 is read out. Next, the mode select signal MSS
1, a check routine 97 that determines whether the sewing is the fifth sewing based on the mode select signal MSS1, and a check routine 98 that similarly determines whether the sewing is the fourth sewing. , a check routine 99 that similarly determines whether or not the sewing is the third sewing, and a check routine 100 that similarly determines whether or not the sewing is the second sewing, and the data of the read sewing program is processed. Routine 101 for creating program data shown in Table 2 of the attached sheet for performing the first sewing based on the routine and Routine 1 for storing the data
It passes through 02 and reaches address SO1.

In addition, data on the number of completed stitches in sewing areas A to F
XA to XF, sewing start position stitch count data XU of sewing area U and sewing completion position stitch count data XP of seam allowance area P are: XA=Aa, XB=Aa+Ba, XC=Aa+Ba+Ca, XD=Aa+Ba+Ca+Da, XE=Aa+Ba+Ca+Da+Ea, =Aa+Ba+Ca+Da+Ea+Fa, XU=Aa+Ba-Ua, XP=Aa+Ba-Ua+Pa, Aa; Stitch number data for sewing area A Ba; Stitch number data for sewing area B Ca; Stitch number data for sewing area C Da; Number of stitches for sewing area D Data Ea; data on the number of stitches in the sewing area E Fa; data on the number of stitches in the sewing area F Ua; data on the number of stitches in the sewing area U Pa; data on the number of stitches in the seam allowance area P.

Therefore, from now on, the sewing machine 1 is controlled in accordance with the data.

When the control program reaches address SO1 as described above, the routine 103 outputs a drive signal to the sewing machine motor drive circuit 51 to drive the sewing machine motor MM based on the start switch 2, as shown in FIG. As soon as the sewing machine motor MM starts driving, data on the amount of creasing in the sewing area A is
Read YA and read the same data in sewing area A.
In order to drive the pulse motor PM and make the feed amount of the sub-feed dog 7 larger than that of the main feed dog 6 so as to be able to perform skew stitching corresponding to YA, a control signal for driving and controlling the pulse motor PM is sent to the pulse motor. Address SO2 is reached through a pulse motor drive subroutine 104, which will be described in detail later, which is output to the drive circuit 52, and a routine 105 which increments the data and reads data XA of the number of completed stitches. Therefore, at the same time when the sewing machine 1 starts driving, the workpiece cloth K is
The criss-cross stitching in the sewing area A is started.

Then, as the sewing machine motor MM is driven, a routine 106 for counting the number of stitches from the stitch count signal from the stitch count counter 57 and calculating the number of stitches, and the data XA of the number of stitches completed in the sewing area A and the number of stitches by the counter 57 are calculated. Check routine 10 for comparing and determining whether sewing is completed in sewing area A
7 and then returns to the routine 106 again.

When the sewing of sewing area A is completed, the routine 108 exits from the loop, increments the data, and reads out the offset amount data YB of sewing area B. In the embodiment, as shown in Fig. 2, since the cradling stitching is not performed in the sewing area B, the data YB is based on the pulse motor PM rotated in the normal direction based on the crooked stitching amount data YA. The pulse motor drive subroutine 109 controls the drive of the pulse motor PM based on the value for rotationally returning to the position (i.e., -YA), and the data is incremented to generate the sewing start position stitch number data of the sewing area U.
Address SO3 is reached through routine 110 for reading XU.

When the sewing start position stitch number data XU is read out, routine 1 inputs a stitch number count signal from the stitch number counter 57 that counts the number of stitches.
11, and a check routine 1 that compares the sewing start position stitch number data XU with the number of stitches in the counter 57 to determine the start of sewing in the sewing area U portion.
12 and then returns to the routine 111 again.

Then, as the sewing progresses in the sewing area B and eventually starts sewing in the sewing area U, the loop is exited and a control signal is sent to the servo motor drive circuit 54 to stop the rotation of the rotating wheel 12. Routine 11 for outputting a control signal to the cylinder drive circuit 53 to raise the pressure roller 13
3, and a routine 114 that increments the data and reads the sewing completion position stitch number data XP of the rear seam allowance P, and reaches address SO4. That is, here, as shown in FIG. 1, when the work cloth K is fed by the main and sub feed dogs 6, 7, etc., the servo is operated until the sewing area U of the work cloth K is fed to the sewing position. The sensor 10 detects the side edge Ka of the work cloth K and presses the pressure roller 1.
3, the work cloth K is pressed and the rotary wheel 12 is controlled to rotate, so that the work cloth K is guided to the regular sewing position. However, when the sewing of the seam area U is started, the seam allowance Kb protruding from the side edge Ka of the work cloth K blocks the reflective plate 11, and the work cloth K is not sent to the normal sewing position. There is a risk that the servo sensor 10 may malfunction even though the However, in this example, the seam allowance
Press roller 13 until Kb completely passes through the sewing position, that is, sewing of seam allowance area P is completed.
Since the rotating wheel 12 is stopped at the same time as the servo sensor 10 is raised, there is no possibility that the work cloth K will be deviated from the normal sewing position due to malfunction of the servo sensor 10.

When the sewing of the stitching area U is started as described above, the routine 115 calculates the number of stitches by counting the stitch count signal from the stitch count counter 57 and the stitch count data of the sewing completion position of the seam allowance area P. After the check routine 116, which compares XP with the number of stitches determined by the counter 57 and determines whether sewing of the seam allowance area P is complete, the routine returns to routine 1.
Continue looping back to 15. When the sewing of the seam allowance area P is completed, the routine 117 exits from the loop, increments the data, and reads out the data XB of the number of completed stitches of the sewing area B, and the press roller 13 that has been raised is The air cylinder and servo motor drive circuits 53 and 53 send control signals for lowering the work cloth K and rotating the rotary wheel 12 based on the detection signal of the servo sensor 10 to send the work cloth K to the regular sewing position. 54 is reached, and the remaining portion of sewing area B is sewn.
Then, a loop consisting of a routine 119 for calculating the number of stitches and a check routine 120 for determining whether sewing is completed in sewing area B based on the number of stitches and the completed sewing number data XB is continued.

When the sewing of the sewing area B is completed, the routine 121 exits from the loop and reads out the erging amount data YC of the next sewing area C, and the pulses that control the forward rotation of the pulse motor PM based on the data YC. Motor drive subroutine 12
2, the routine 123 is reached which reads data XC on the number of completed stitches of the next sewing area C. Therefore, as soon as the sewing of the workpiece cloth K moves from sewing area B to sewing area C, the pulse motor PM is controlled to rotate in the forward direction, and the feed amount of the sub-feed dog 7 is adjusted to correspond to the crimp amount data YC. The adjustment is made, and criss-cross stitching is performed on the work cloth K. A loop consisting of a routine 124 that calculates the number of stitches based on the number of stitches counter 57, and a check routine 125 that determines whether sewing is completed in the sewing area C based on the same number of stitches and the completed sewing number data XC. Continue to rotate.

When the sewing of the sewing area C is completed, the loop is exited, and the data YD of the amount of offset of the next sewing area D (in this embodiment, the offset of the sewing area D is larger than the offset of the sewing area C) Therefore, the routine 126 reads out the erroneous amount data YD (the value that increases by that amount is calculated and set), and based on the data YD, the pulse motor PM is controlled to rotate forward by the amount of increase. After passing through the pulse motor drive subroutine 127, data on the number of completed stitches of the next sewing area D is obtained.
A routine 128 is reached which reads XD. Therefore, when the sewing of the work cloth K moves to the sewing area D, the pulse motor PM is immediately controlled to rotate in the normal direction, and the feed amount of the sub-feed dog 7 is adjusted to correspond to the skewing amount data YD. Irregular stitching is performed on the work cloth K. The stitch number counter 57
The loop continues, consisting of a routine 129 that calculates the number of stitches based on the number of stitches, and a check routine 130 that determines whether sewing is completed in the sewing area D based on the number of stitches and the data XD on the number of completed stitches.

When the sewing of the sewing area D is completed, the loop is exited and the data YE of the amount of edging of the next sewing area E (in this embodiment, the edging of the sewing area E is the same as the edging of the sewing area C) Therefore, the same set amount data YE is calculated and set by subtracting the increased value as is).
After passing through a pulse motor drive subroutine 132 that controls the reverse rotation of the pulse motor PM based on YE, a routine 132 is reached that reads data on the number of completed stitches (XE) of the next sewing area E. Therefore, when the sewing of the work cloth K moves to the sewing area E, the pulse motor PM is controlled to rotate in the reverse direction, and the feed amount of the sub-feed dog 7 is adjusted to correspond to the skewing amount data YE. A crooked stitch is performed on K of the cloth. Then, a loop consisting of a routine 134 that calculates the number of stitches based on the number of stitches counter 57 and a check routine 135 that determines whether sewing is completed in the sewing area E based on the same number of stitches and the completed sewing number data XE is executed. Keep spinning.

When the sewing of the sewing area E is completed, the data exits from the loop and the data YF of the erging amount of the next sewing area E (in this embodiment, the sewing area F
Since the sewing is a normal double chain stitch with no offset stitching, the same offset stitching amount data
YF is calculated and set to a value necessary to rotate the pulse motor PM in the reverse direction so that the feed amount of the sub feed dog 7 is the same as the feed amount of the main feed dog 6); Same data
After passing through a pulse motor drive subroutine 137 for controlling the reverse rotation of the pulse motor PM based on YF, a routine 138 is reached for reading data XF on the number of completed stitches of the next sewing area F. Therefore, processed cloth K
When the sewing moves to sewing area F, the pulse motor
The PM is immediately controlled to reverse rotation, and the initial data is
Corresponding to YF, the feed amount of sub feed dog 7 is changed to main feed dog 6.
is adjusted to match the feed amount of the workpiece cloth K.
Normal double chain stitching is performed. Then, a routine 139 for calculating the number of stitches based on the number of stitches counter 57, the same number of stitches and the completed number of stitches data.
The loop consisting of a check routine 140 that determines the completion of sewing of the sewing area F, that is, the completion of sewing of the work cloth K, based on XF is continued.

When the sewing of the sewing area F is completed, the sewing machine motor MM exits from the loop.
After a routine 141 in which a stop signal for stopping the machine is output to the sewing machine motor drive control circuit 51, one round of sewing on the workpiece cloth K is completed, and the machine returns to the main address again to prepare for sewing the next workpiece cloth K. .

Although this embodiment has described the sewing patterns based on the memory select MS1, even if the other memory select switches MS2 to MS5 are selected as appropriate, the data program of each sewing pattern stored in the memory RAM shown in Table 1 will not change. Based on this, data for the first sewing as shown in Table 2 is created in the same manner as described above, and the work cloth can be sewn in the same manner as described above.

Therefore, it is possible to suitably and easily set the amount of crimp for each sewing part of the work cloth K in advance, so that it is possible to improve the efficiency of sewing work, and it is easy to use even for non-skilled workers. Can be done.

Next, the pulse motor drive subroutine 104 for driving and controlling the pulse motor PM will be explained based on FIG. 10.

Now, when sewing in the sewing area A is started, the data YA of the amount of creasing in the sewing area A stored in the routine 102 is read out and stored in the register of the microcomputer MC.
Now, the pulse motor PM is in its original position (rotational position of the pulse motor PM when there is no uneven stitching)
If the data value YA of the sewing area A is equal to the feed amount of the sub-feed dog 7 in the sewing area A by normal rotation of 6 steps from It is written and remembered. Then, when the sewing machine motor MM is started to be driven by the routine 103, a drive signal is immediately outputted to the pulse motor drive circuit 52 to rotate the pulse motor PM one step forward, and the signal is stored in the register. a routine (not shown) that subtracts the data value by 1;
A check routine 142 that detects a positive potential detection signal output from the needle position detector 56 when the sewing needle 4 that reciprocates up and down reaches the uppermost position; a routine 143 that counts the number of sewing stitches based on the detection signal; Then, a loop returns to the check routine 142 via a check routine 144 which determines that the number of same stitches has reached 3. And sewing needle 4
When the sewing machine has sewn three stitches, the routine 14 exits from the loop and outputs a drive signal to the pulse drive circuit 52 to rotate the pulse motor PM one step forward.
5. The loop continues through a routine 146 that subtracts 1 from the data value of the register and a check routine 147 that determines whether the subtracted data value is 0 or not, and then returns to the check routine 142 again. The step motor PM is rotated one step every time the sewing needle 4 sews three stitches, and is intermittently controlled to rotate up to six steps. Therefore, there is no sudden change in the feed amount of the sub-feed dog 7.
It is possible to finish the sewing transition portion of the work cloth K very neatly.

Similarly, each pulse motor drive subroutine 1
09, 122, 127, 132, and 137 also store the skew amount data YB, YC, YD, YE, and YF in the registers, and each time the sewing needle 4 sews 3 stitches based on the same data value, 1 step is performed. The 11th rotation is performed by rotating the pulse motor PM in the forward or reverse direction.
As shown in the figure, each rotation is controlled up to a predetermined number of steps.

Next, for the second sewing, data on the amount of stubble in each sewing area A to F of each sewing program shown in Table 1 stored in the memory RAM is adjusted based on the operation of each of the stub correction switches SWA to SWF. A case where the modified work cloth K is sewn will be described.

Now, the worker is trying to switch the memory select switch MS.
1 is pressed, and then in order to sew the work cloth K by slightly modifying the data YA to YF of the data YA to YF of the data on the data YA to YF of the data on the data YA to YF in the sewing areas A to F, set the corrections using the data correction switches SWA to SWF. Then, the mode select switch MSS is operated to switch to the second sewing mode. Then, when the start switch 2 is pressed, the control program is activated by the mode select switch 2.
Mode select signal MSS2 output from MSS
Based on this, as shown in FIG. 8, the sewing program data shown in Table 1 and the skew correction switch SWA~ are sent from the check routine 100 as shown in FIG.
Is correction signal SGSWA output from SWF
~ Corrected setback amounts (±ΔA) ~ (±ΔF) calculated based on SGSWF, the SO1
Reach the street address. Thereafter, the work cloth K is sewn based on the data shown in Table 3 in the same manner as in the first sewing.

Therefore, each of the above correction switches SWA~
Operate SWF and use mode select switch
By simply switching the MSS to the second sewing mode, each sewing area A to
The work cloth K can be sewn by easily modifying the amount of creasing of F in various ways.

Similarly, other memory select switches MS1~
If MS5 is selected appropriately, data for the second sewing as shown in Table 3 above is created in the same manner as above based on the data program of each sewing pattern stored in the memory RAM shown in Table 1 above. Then, the work cloth can be sewn in the same manner as described above.

Next, for the third sewing, the stitch number data of each sewing area A to F of each sewing program shown in Table 1 stored in the memory RAM is adjusted to a predetermined ratio based on the operation of the total stitch number correction switch SWT. A case will be described in which the work cloth K is sewn based on the converted number of stitches.

Now, the worker is switching the memory select switch MS.
Press 1 and then enter the stitch count data for each sewing area A to F.
Aa~Fa, that is, each sewing completed stitch number data XA~
In order to convert XF into a predetermined ratio and sew work cloth K, the ratio is changed to the total correction switch SWT.
and then press the mode select switch.
Switch MSS to 3rd sewing. When the start switch 2 is pressed, the control program changes the data of the sewing program shown in Table 1 from the check routine 99 as shown in FIG. 8 based on the mode select signal MSS3 output from the mode select switch MSS. , the ratio calculated based on the total correction signal SGSWT output from the total correction switch SWT (=1±
V/100, V: the value set by the total correction switch SWT), the program passes through a routine 153 for creating a data program shown in Table 4 and a routine 154 for storing the data, and then reaches the address SO1.

Thereafter, based on the data shown in Table 4, the first
The work cloth K is sewn in the same way as in the case of sewing.

Therefore, the total correction switch SWT is sewn and the mode select switch MSS is set to the third position.
By simply switching to sewing, you can easily modify the number of stitches in each sewing area A to F of the sewing program for a preset workpiece cloth K, so even workpiece cloths of different sizes can be easily modified. Can be easily sewn.

Similarly, other memory select switches MS2~
If MS5 is selected appropriately, the data for the third sewing is created in the same manner as above as shown in Table 4 based on the data program of each sewing pattern, and the work cloth is sewn in the same way as above. Can be sewn.

Next, for the fourth sewing, the stitch number data and crimp amount data of each sewing area A to F of each sewing program are transferred to the total stitch number correction switch SWT.
The processed cloth K is converted into a predetermined ratio based on the operation of
The case of sewing will be explained.

Now, as in the case of the third sewing, the operator operates the memory select switch MS1 and the total number of stitches correction switch SWT, and then switches the mode select switch MSS to the fourth sewing. When start switch 2 is pressed, the mode select signal is output from the mode select switch MSS.
Based on MSS4, as shown in FIG. 8, the sewing program data shown in Table 1 and the total stitch number correction switch are changed from the check routine 98 to
Total correction signal SGSWT output from AWT
The ratio calculated based on (=1±V/100,
V: the value set by the total stitch number correction switch SWT), the routine 155 for creating the data program shown in Table 5 and the routine 156 for storing the data are passed, and the address S01 is reached.

Therefore, by simply operating the total correction switch SWT and switching the mode select switch MSS to the fourth sewing mode, the number of stitches in each sewing area A to F of the sewing program for a preset work cloth K can be changed. Since the amount of creasing can be adjusted relatively easily, it is possible to easily sew fabrics of different sizes.Moreover, since the amount of creasing is adjusted relative to the number of stitches at this time, the size When the size of the workpiece cloth K changes to a greater extent than the predetermined size of the workpiece cloth K, the workpiece cloth can be sewn without becoming too uneven or becoming too tight, unlike in the case of the third sewing. .

Next, for the fifth sewing, the data on the amount of set-up in each sewing area A to F of each sewing program is corrected based on the operation of the set-up correction switches SWA to SWF, and the data on the number of stitches in the areas A to F are corrected. A case will be described in which the corrected skew amount data are converted into a predetermined ratio based on the total correction switch SWT, and the work cloth K is sewn based on the converted data.

Now, the worker operates the memory select switch MS1 and each set correction switch SWA to SWF as in the case of the second sewing, and also operates the total stitch number correction switch SWT as in the case of the third sewing. Said mode select switch SWT
, then press the mode select switch mentioned above.
Switch MSS to 5th stitch. Then, when the start switch 2 is pressed, the mode select switch output from the mode select switch MSS
Mode select signal MSS4 output from MSS
Based on the sewing program shown in Table 1 from the check routine 97 as shown in FIG.
Corrected set-up amount (±ΔA) to (±ΔF) calculated based on set-up correction signals SGSWA to AGSWF from the set-up correction switches SWA to SWF.
and the ratio calculated based on the total correction signal SGSWT from the total number of stitches correction switch SWT (=1±V/100, V; the value set by the total number of stitches correction switch SWT), the data shown in Table 6 is obtained. After passing through a routine 157 for creating a program and a routine 158 for storing its data,
Reach address SO1.

Therefore, the correction switches SWA to SWF,
By simply operating the total stitch count correction switch STW and mode select switch MSS, the second
It is possible to sew a work cloth whose size is significantly different from the work cloth set by sewing with the same effect as in the fourth sewing.

In this way, set the sewing program for the standard work cloth K, and turn the mode select switch.
If you select any one of the 1st to 5th sewing as appropriate in MSS, you can sew a workpiece cloth of a different size from the standard workpiece cloth K, or create a workpiece cloth with a different amount of creasing in each sewing area A~F. Sewing can be done easily.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and the sewing pattern may be increased or decreased by increasing or decreasing the memory select switch, or the operation of only one of the rotating wheel 12 and the pressing roller 13 may be controlled. , it is also possible to make appropriate changes without departing from the spirit of the invention.

Effects of the Invention As detailed above, the present invention includes a first step of allocating data on the amount of creasing in correspondence to each section of a sewing area that is divided into a plurality of sections and is continuous;
Based on the data on the amount of data distributed to each section of the sewing area in the first step, intermediate data on the amount of data on the product is calculated so that the level difference in the size of data on the data in adjacent sections is eliminated. By providing a second process to do this, the difference between the feed amount of the main feed device and the feed amount of the sub-feed device of the sewing machine, that is, the differential feed amount, can be maintained even between adjacent sewing areas with different offset amounts. Since there is no sudden change in the cam, it is possible to finish sewing transitions very neatly, and when you want to change the serration ratio, there is no need to replace the cam with a predetermined serration amount. The work efficiency can be improved, and the efficiency of sewing work such as various criss-cross stitching can be improved, and even non-skilled people can easily and neatly sew.

[Brief explanation of the drawing]

Fig. 1 is a front view of a processed cloth for explaining this invention, Fig. 2 is a front view of a processed fabric similarly sewn with uneven stitches, Fig. 3 is a perspective view of a sewing machine embodying this invention, and Fig. 4 is a front view of a processed cloth for explaining this invention. The figure is a perspective view of the main part showing the feed mechanism for the work cloth, Figure 5 is the electric block circuit diagram for controlling the Mosin, Figures 6 to 10 are flowcharts of the microcomputer, and Figure 11 is the same. FIG. 3 is an explanatory diagram showing changes in the amount of creasing in each sewing area of the work cloth. Sewing machine...1, Start switch...2, Sewing needle...
4, Main feed dog...6, Sub feed dog...7, Servo sensor...10, Reflector...11, Rotating wheel...1
2, Press roller...13, Main feed table...21, Sub feed table...22, Sewing machine main shaft...25, Eccentric cam for vertical feed...26, Eccentric cam for longitudinal feed...2
8. Swinging axis...30, Swinging arm...31, Feeding arm...
...33, Adjustment axis...36, Adjustment lever...37,
Adjustment link...38, Sliding sesame...39, Link...42, Sewing machine motor drive circuit...51, Pulse motor drive circuit...52, Cylinder drive circuit...
...53, Servo motor drive circuit...54, Display drive circuit...55, Needle position detection circuit...56, Stitch number counter 57, Work cloth...K, Sewing area...A
~F, Seam area...U, Seam allowance area...
...P, servo motor...SM, pulse motor...
PM, sewing machine motor...MM, memory select switch MS1 to MS5, mode select switch...MSS, microcomputer...MC, set correction switch...SWA to SWF, total stitch count correction switch...SWT, data select switch ...DSS, data input switch...INS, display device...DSP, number of stitches indicator lamp...L1, setting indicator lamp...L2.

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Claims (1)

[Scope of Claims] 1. A first step of allocating data on the amount of creasing in correspondence to each section of a sewing area that is divided into a plurality of sections and is continuous; and a second step of calculating intermediate set-up amount data in which the difference in size of set-up amount data of adjacent sections tends to be eliminated, based on the set-up amount data distributed to each other. How to create data on the amount of irregularities.