JPS597475B2 - sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention has a function of selectively and automatically forming many kinds of predetermined seam patterns, and a function that allows an operator to create various kinds of seam patterns as needed in addition to the predetermined seam patterns. This invention relates to a sewing machine that also has the function of forming a desired stitch pattern using a sewing machine, and its purpose is to collect information corresponding to each stitch pattern in order to selectively form a variety of predetermined stitch patterns. Each nine sewing machine is equipped with a first memory device that stores the group and a second memory device whose memory contents can be programmed to form a stitch pattern corresponding to a pattern devised by the operator himself. By creating a configuration that allows the creation of multiple types of predetermined seam patterns as well as arbitrary seam patterns desired by the operator, the number of types of seam patterns that can be formed with a single sewing machine is dramatically increased. As well as being able to
To provide a sewing machine which can avoid the mechanical configuration of the sewing machine from becoming complicated and enormous, and further allows an operator to easily create information using a program to obtain any desired stitch pattern. .

Hereinafter, the present invention will be explained in detail with reference to an embodiment shown in the drawings.

FIG. 1 shows the external appearance of the sewing machine, showing only the parts related to the present invention, and FIG. 2 similarly shows only the parts related to the invention of the internal structure of the sewing machine.

Now, in Figures 1 and 2, the sewing machine frame 1 is connected to the stand 2,
It consists of a support 3 rising up from the base 2 and an arm 4 extending horizontally from the support, and an upper shaft 5 and A lower shaft 6 is provided, and an upper shaft 5 is rotated by a drive motor (not shown) via a main pulley 7.

8 is a needle rocking device that gives a horizontal rocking motion to the sewing needle 9;
Detailed illustration of the structure is omitted since known means are sufficient, but the swing support 10 directly contributes to the swing movement.
This is provided with a needle bar 11 that moves up and down reciprocally in conjunction with the upper shaft 5, and a sewing needle 9 is connected to this needle bar 11.

The swinging support 10 provides a lateral swinging motion to the sewing needle 9.
is adapted to be swung by a drive link 12,
For this purpose, one end of the drive link 12 is connected to the swing support 10.
The other end is connected to an amplitude control actuator 14, which will be described later, and the swing amplitude of the sewing needle 9 in the lateral force direction is controlled by the amplitude control actuator 14.

Reference numeral 15 denotes a feeding device that imparts a feeding motion to the workpiece cloth in synchronization with the up and down reciprocating movement of the sewing needle 9;
However, since a known structure is sufficient for the present invention, only the parts useful for understanding the present invention are shown.

In the feed device 15, the feed drive shaft 16 is rotationally driven from the lower shaft 6 via a gear mechanism 17.
The rotation of the feed drive shaft 16 is controlled by the cam 18 and the cam holding rod 19.
, and via the shaft 20 to the link 21 as a rocking motion, which in turn excites the feed dog 23 via the feed bar 22 to a feed movement.

As is well known, the shaft 20 slides in a groove 25 provided in a grooved member 24 so as to control the feed amount (feed increment) and the feed direction of the work cloth by one feed movement of the feed dog 23. It is equipped with square pieces.

The grooved member 24 is integrally connected to a lock shaft 24a, and a lock arm 24b is attached to this lock shaft 24a.
is connected to the lock arm 24b, and one end 27 of an adjusting rod 26 is connected to the lock arm 24b. When the adjusting rod 26 is mechanically displaced in the longitudinal direction, the one-knock shaft 24a is connected via the lock arm 24b. is rotated, the grooved member 24 is rotated, and therefore the inclination angle of the groove 25 is controlled.

As is well known, the angle of inclination of the groove 25 and the direction of its rotation determine the feed increment and the direction of feed of the work cloth.

Adjustment rod 2 is used to control such feed increment and direction.
6 is provided with a feed control actuator 28 for applying mechanical displacement.

Next, this feed control actuator 28 will be described in detail with reference to FIG. There is a permanent magnet plate 30 on the inner surface of each side. 30 are fixed to the magnetic yoke 29 with their opposing surfaces having the same polarity, and a neutral magnetic leg 31 is fixed to the magnetic yoke 29 by a screw 32 at the intermediate portion between the opposing permanent magnet plates 30 and 30. It is located in a state where

An extremely lightweight bobbin 34 wound with a coil 33 is inserted into the neutral magnetic leg 31 so as to be linearly movable.

Reference numeral 35 denotes a cover plate made of magnetic material that is fixed to the neutral magnetic leg 31 with screws 36, and an arm 38 integrated with the bobbin 34 is inserted through a pair of slots 37 and 37 in the cover plate 35.
, 38 project through the lever 40, and one end 41 of a lever 40 is supported by a single shaft 39 between the tips of the arms 38, 38, and is formed by a retaining ring 42 of the shaft 39.

A support plate 43 is connected to the lower part of the cover plate 35 via a connection means (not shown), and a plurality of support protrusions formed on the support plate 43 have an intermediate portion of the lever 40 attached to a rotation shaft 44. The pivot shaft 44 is supported by the lever 4.
It is designed to rotate together with 0.

The adjustment rod 26 is connected to the other end 45 of the lever 40.

The pivot shaft 44 of such a feed control actuator 28
A sliding shaft 47 of a well-known resistance type potentiometer 46 is connected to.

Due to this feed control actuator 28, the coil 33
When a direct current is applied to the permanent magnet plate 30, this current and the permanent magnet plate 30
, 30 generates a linear movement force in the coil 33 that is proportional to the current value, and when the bobbin 34 moves along the neutral magnetic leg 31, the lever 40 moves in the corresponding direction around the rotation axis 44. This rotation causes the sliding shaft 47 of the potentiometer 46 to rotate.

The above-mentioned amplitude control actuator 14 also has the same configuration as the above-mentioned feed control actuator 28 and is equipped with the same potentiometer 48.
2 is connected to a lever 40 in the amplitude control actuator 14.

49 is a pulse generator that generates a timing pulse (directly, an amplitude control timing pulse BCP to be described later) in conjunction with the upper shaft 5, and generates the timing pulse in synchronization with the up and down reciprocating movement of the sewing needle 9. It looks like this.

Note that 50 shown in FIG. 2 is each unit of an electric circuit to be described later, and FIG. 2 shows an example of the arrangement thereof.

Next, an explanation will be given of the electrical control circuit for particularly controlling the feed and swing amplitude of this sewing machine.

The overall configuration of this electrical control circuit is shown in FIG.

The selection device 51 for selectively validating one information group, which will be understood later, includes pattern selection switches S1 to S6.
, SP.

Figure 8 A, B, C, D, E and F are straight stitches,
Shown are a zigzag seam, a three-point zigzag seam, a blind seam, a German blind pattern, and a lattice pattern.

The six pattern selection switches S1 to S6 correspond to each of the six types of stitch patterns in the above order, and the remaining pattern selection switch SP corresponds to a stitch pattern obtained by programming by the operator. It corresponds to

Each of the pattern selection switches S1 to S6, SP is arranged in an easily operable part of the sewing machine frame 1, for example, on the operator's side of the arm part 4 as shown in FIG. , is configured to be mechanically maintained in the operating state until the other items are suppressed.

In the arm section 4, although electrical connections are not shown in the parts corresponding to the pattern selection switches S1 to S6 and SP, there are selection switches that light up when they are operated to indicate that they are in operation. Display lamps 52 are provided, and these selection display lamps 52 and pattern selection switches S1 to S
In the area between 6 and SP, as shown in FIG. 1, there is a display 53 representing the shape of a stitch pattern.

One end of each of the pattern selection switches S1 to S6, SP is connected to the DC power supply positive terminal 54, and the other end of each of the pattern selection switches S1 to S6 and SP is connected to the selection line L1.
It is connected to L6 to L6 and LP, and is also connected to an OR circuit and 55 different input terminals.

The output terminal of the OR circuit 55 is connected to the input terminal of the monostable multi-bi break 56, so that when any one of the pattern selection switches S1 to S6, SP is selectively closed, a predetermined signal is selected from the monostable multi-bi break 56. A high-level reset signal CPI having a time width of 1 is output.

Is this reset signal CPI in? The waveform conversion circuit 63 includes an integrator 57, a resistor 58, and a capacitor 59, a NAND circuit 61, and an inverter 62, and is converted into a reset pulse RSP. It is output to the reset output terminal 64.

On the other hand, when the sewing machine is in actual operation, the pulse generator 49 generates an amplitude control timing pulse BC as shown in FIG.
Generate P.

In FIG. 5, 65 represents the needle tip vertical movement locus when 66 shown by a straight line is the upper surface of the throat plate, and 67 represents the feed dog 23 protruding upward from the upper surface 66 of the throat plate to feed the work cloth. It shows the period of time.

A fifth pulse related to the amplitude control timing pulse BCP.
In order to obtain the feed control timing pulse FCP as shown in the figure, and for reasons that will be understood later, the reset output terminal 64 is connected to one input terminal of a NAND circuit 70 via a delay circuit 68 and an inverter 69. Furthermore, the amplitude control timing pulse BCP output line L21 of the pulse generator 49 is connected to the other input terminal of the NAND circuit 70, and the output line L2
．． are connected to respective counting input terminals CT of first and third address counters 71 and 73 corresponding to readout devices, and output line L22 of the NAND circuit 70 is connected to a second address counter that is connected to another readout device. 72 counting input terminal CT, and the reset output terminal 6
4 is connected to the reset input terminal RT of each address counter 71, 72, 73.

Here, the delay circuit 68, inverter 69, and NAND circuit 70 collectively constitute a pulse distributor 74.

Further, the first and second address counters 71 and 72 are used to read out each piece of information in a group of information corresponding to various kinds of stitch patterns that are preset in correspondence with the pattern selection switches S1 to S6. The address counter 73 is used to read out the swing amplitude information programmed by the operator.

Now, the reset output terminal 64 is connected to the reset pulse RS.
Since the potential of the inverter 69 is always at zero level, that is, generally at a low level, except during the generation period of P, the output of the inverter 69 is at a high level. 70, the output line L of that NAND circuit 70
2 is a feed control timing pulse FCP corresponding to a phase inversion of the amplitude control timing pulse BCP.
is output.

Both the first and second address counters 71 and 72 are 6
Pinary counter and third address counter 73
has a hexadecimal pinary counter configuration, and these are reset to decimal (0) by a reset pulse RSP when any one of the pattern selection switches S1 to S6, SP is selected and closed. Thereafter, pulses CP2 and CP3 (see FIG. 5) generated at each falling edge of the amplitude control timing pulse BCP and feed control timing pulse FCP inputted thereto are counted.

Therefore, as is clear from FIG. 5, the second address counter 72 related to the feed control is synchronized with the time TO when the sewing needle 9 pierces the workpiece cloth in the process of descending from needle top dead center and reaches below the throat plate. and then the first and third address counters 7 for controlling the lateral swing amplitude of the sewing needle 9
1 and 73 are counted in synchronization with time T1 when the sewing needle 9 rises from the bottom dead center and comes out of the work cloth, and then the feed dog 23
is related to the time when the work cloth is sent between times (T2-T3), and the second address counter 72 always has a count that is one step ahead of the first and third address counters 71 and 73. be made into

Reference numeral 75 denotes a predetermined unit for controlling the lateral swinging movement of the sewing needle 9 and the feeding movement of the feeding device 15 in order to form various kinds of predetermined stitch patterns as shown in FIGS. 8A to 8F. This is a first storage device that stores information groups of analog signals corresponding to each stitch pattern, and is composed of a first amplitude information storage section 76 and a first feed information storage section 77.

Reference numeral 78 denotes a second storage device whose memory contents can be programmed arbitrarily by the operator's operation in order to form any stitch pattern desired by the operator. It is constituted by a second sending information storage section 80.

The first amplitude information storage section 76 is for storing the oscillation amplitude information shown in the "amplitude information" column of FIGS. 9A to F, and specifically has a configuration as shown in FIG. 6. It has become.

Incidentally, each of FIGS. 9A to 9F shows pattern selection switch names and stitch pattern names that are in a corresponding relationship, respectively.

In the first amplitude information storage section 76 shown in FIG.
is the first multiplexer group, which is composed of six multiplexers 82 to 87 corresponding to the various stitch patterns shown in FIG. Ru.

The selection lines L1 to L6 are connected to each selection input terminal ST of these multiplexers 82 to 87.

On the other hand, as shown in FIGS. 6 and 7, the counts of the first address counter 71, second address counter 72, and third address counter 73 remain in binary code, and the lines corresponding to each bit are L3, L32, L34
and L4, -L4, L44 and L5p "52 p
L54 and jL58 are respectively output as address codes, and among these, line L3.

yIj41 pL51 corresponds to the least significant digit of the 8,4,2,1 code.

The lines L3, , L32, and L34 are connected to the multiplexer 8.
A line L3 is connected to the addressing terminal X of the multiplexer 83.

88 is a signal source circuit, which is connected between a bus 90 connected to a signal power positive terminal 89 made of a DC power supply, a bus 91 connected to its negative terminal (indicated by a ground symbol), and both buses 90 and 91. Each voltage dividing resistor group 92, 93 and 94 is composed of series connected resistors R1, R2, R3, R4 and R5, R6, each having a dividing voltage output terminal 95 to 97. In this embodiment, the voltage of the signal power supply positive terminal 89 is set to 6V (volts), and R1=R2=3KΩ, R3=R6=2
KΩ, R4 = R, = IKΩ, so the bus line is 90
is 6■, the bus bar 91 is OV, the divided voltage output terminal 95 is 3■, the divided voltage output terminal 96 is 2■, and the divided voltage output terminal 97 is 4■, and each of these voltages is used to create analog signal information. serves as a signal voltage source.

A signal line L61jL62 is derived from the bus bar 90, a signal line L63p''64 is derived from the bus bar 91, and signal lines L65, L66, and L6 are derived from the voltage dividing resistor terminals 95, -96, and 97, respectively. is derived.

The input terminal P of the multiplexer 82 has a signal line L.
65 is connected to the input terminal P of the multiplexer 83.

, P are connected to signal lines "63 p L61, respectively.

Also, in the multiplexer 84, the input terminal P.

A signal line L64 is connected to the input terminals P1, P, a signal line L66 is connected to the input terminals P1, P, a signal line L6 is connected to the input terminals P2 and P4, and a signal line L6 is connected to the input terminal P3. P.

p PI p p2y P3 p P5 has signal line L62, input terminal P4 has signal line? 64 are respectively connected to the input terminals P at the multiplexer 86.

p P2 p P4 has a signal line L6 and an input terminal P
A signal line L6 is connected to the input terminal P5, and a signal line L64 is connected to the input terminal P5.

, P2 has a signal line Ijaa, and input terminals P3, P,
A signal line L6 is connected to the input terminals P1 and P4, and signal lines L64 and L6 are connected to the input terminals P1 and P4, respectively.

The information output terminals ¥1 to ¥6 of the multiplexers 82 to 87 are connected in common, respectively, and then the amplitude leg driver 9
Coil 3 of said amplitude control actuator 14 via 8
Connected to 3.

To explain the functions of the multiplexers 82 to 87 using the marmoplexer 84 as an example, the multiplexer 8
4 is enabled by applying a positive potential signal to the selection input terminal ST, and the addressing terminals X1, X2
, Accordingly, the input terminal P.

The input terminals P are sequentially designated as p"1 p P2...P5.

The analog voltages input to P5 to P5 are sequentially output to the information output terminal Y3.

Since the multiplexer 82 does not receive an address code, the signal from the input terminal P is always output to the information output terminal ¥1 while the pattern selection switch S1 is selected and closed, and the multiplexer 83 receives only one signal. Since only the address designation terminal X1 exists, the information output terminal
2 is the input terminal P.

, P1 are alternately output in synchronization with the counting progress of the first address counter 71.

Therefore, the i-1 amplitude information storage section 76 shown in FIG. ...From ¥6, Figure 9 A, B...
The configuration is such that the voltages shown in each "amplitude information" column of F are sequentially output as swing amplitude information in synchronization with the counting progress of the first address counter 71.

In the first sending information storage section 77 shown in FIG.
is a signal source circuit similar to that described above, with a bus 100 connected to the signal power supply positive terminal 89 and a bus 1 connected to its negative terminal.
01, a voltage dividing resistor group 102 consisting of resistors R7 to RIO connected in series between the bus bars 100 and 101, and these resistors R7 to ? Divided voltage output terminal 1, which is the common connection point between R1o
03, 104, and 105.

In this example, R7=0.6KΩ, R8=1.2KΩ,
R,=0. 6 KΩ, R1o = 3.6KΩ, so the bus bar 100 is 6■, the voltage divided output terminal 103
is 5.4, the voltage at the partial voltage output terminal 104 is 4.2, the voltage at the partial voltage output terminal 105 is 3.6, and the voltage at the bus bar 101 is 0.

Reference numeral 106 designates a second multiplexer group, which includes a multiplexer 107 which is also used for forming the stitch patterns shown in A and B in FIG. 8, and a multiplexer 107 which is also used for forming the stitch patterns shown in FIG. and multiplexers 109 and 110, respectively, used exclusively for forming the stitch patterns shown in FIGS. 8D and 8F.

A selection line "lyL2" is connected to the selection input terminal ST of the multiplexer 107 via an OR circuit 111, and selection lines L3 and L5 are connected to the selection input terminal ST of the multiplexer 108 via an OR circuit 112. , selection input terminals ST of multiplexers 109 and 110 are connected to selection lines L4 and L6, respectively.

The lines I-'41 1 L4, L44 derived from the second add counter 72 are connected to the multiplexer 109.
, 1 1 0 are connected to addressing terminals X1, X2, and X4, respectively.

Voltage dividing output terminals 103 to 105 of the voltage dividing resistor group 102
From the bus bar 100, signal lines L74, L75 are derived, and from the bus bar 101, a signal line L76 is derived.

A signal line L7 and L72 is connected to each input terminal P of multiplexers 107 and 108, and input terminal P of multiplexer 109 is connected to input terminal P of multiplexer 107 and 108, respectively.

, P0, P2, P3 have a signal line L74, and input terminals P4, P5 have a signal line L? 3 are respectively connected to the input terminals P in the multiplexer 110.

A signal line L76 is connected to pP3, and input terminals P1, P2,
Signal lines L75 are connected to P4 and P5, respectively.

The information output terminals 11 to Y14 of the multiplexers 107 to 110 are commonly connected to each other, and then connected to the feed control actuator 2 via the feed control driver 113.
8 coil 33.

When the multiplexer 107 receives a positive potential signal to the selection input terminal ST through the selection line L1 or L2, the voltage shown in the "sending information" column of FIGS. 9A and B is sent as the sending information from the input terminal P. Output end? ¥1. When the multiplexer 108 receives a positive potential signal through the selection line L3 or L5, the signals shown in FIG.
The voltage shown in the "sending information" column of E is always output from the input terminal P to the information output terminal ¥1 as sending information.

Further, when multiplexers 109 and 110 receive positive potential signals at their selection input terminals ST through selection lines L4 and L6, respectively, the voltages shown in the sending information columns of FIGS. 9D and F are sent as sending information. These input terminals P are synchronized with the counting progress of the second address counter 72.

, P1... Information output terminals Y13 and ¥ in order from P5
14.

A second amplitude information storage section 79 of a second storage device 78, in which stored information is arbitrarily programmed by the operator, stores information about each stitch connected in parallel between generatrix 90 and 91, as shown in FIG. It is composed of an analog memory 114 and a multiplexer 115, each consisting of 16 voltage-dividing variable resistors 114o to 114.5 corresponding to the respective resistance values. Each slider 117 has a single slider 117 to be changed, and each slider 117 is connected to operating members 116o to 11615 (see FIG. 1) that are operated by an operator, and these operating members 116o As shown in FIG. 1, each of the slits 11615 can be slid into 16 horizontally long slits 118 formed in 16 steps in the vertical direction on the side wall of the support column 3 on the operator's side of the sewing machine frame 1. It is protruded through.

Each slit 118 has operating members 116o to 116.
1, that is, the needle drop position corresponding to the changed resistance values of the voltage dividing variable resistors 114o to 114,
A scale 119 serving as a guide for needle position coordinates is displayed intermittently in the longitudinal direction, and a slit number corresponding to each stitch number is also displayed next to each slit 118.

Now, signal lines L80 to L95 are led out from each slider 117 of the voltage-dividing variable resistors 114o to 1145, and these are connected to each of the 16 input terminals P of the multiplexer 115.

They are connected correspondingly to P15 to P15, respectively.

In the multiplexer 115, the third address counter 7 is connected to the address designating terminals X0, X2, X4, and X8.
Line L51 derived from 3, "52 y" 54
58 are connected to each other, the selection line LP is connected to the selection input terminal ST, and the information output terminal Y is connected to the selection line LP.
7 is connected to the input terminal of the amplitude control driver 98.

As shown in FIG. 7, the second sending information storage section 80 of the third storage device 78 includes one voltage dividing type variable resistor 120 and a multiplexer 12 connected between the bus bars 100 and 101.
1, the sliding terminal 12 of the voltage dividing variable resistor 120
2 is connected to the input terminal P of the multiplexer 121, its selection input terminal ST is connected to the selection line LP, and the information output terminal Y15 is connected to the input terminal of the feed control driver 113.

An operating member 123 for slidingly operating the sliding terminal 122 of the voltage-dividing variable resistor 120 is connected, and this operating member 123 is adjacent to the group of slits 118 of the support 3 in the sewing machine frame 1. The sewing machine frame 1 protrudes outside the sewing machine frame 1 through a vertically long slit 124 formed in the section where the sewing machine frame 1 is formed.

Then, on the long edge of the slit 124, numerical symbols in five stages corresponding to the vertical feed increment are displayed in the upper and lower half regions with the zero position in the middle of the vertical direction. At the same time, the letter "F" representing forward feeding is attached to the upper end, and the letter "R" indicating backward feeding is attached to the lower end.

On the other hand, the amplitude control driver 98 is connected to the multiplexer 82.
87 and 115 and a comparator 125 having a negative input terminal receiving a feedback voltage from the potentiometer 48 of the amplitude control actuator 14, and an amplifier 126.
13 is similarly composed of a comparator 127 and an amplifier 128.

The amplitude control driver 98 and the amplitude control actuator 14, as well as the feed control driver 113 and the feed control actuator 28, each correspond to the operating device of the present invention.

Next, the operation of the above configuration will be explained.

The relationship between the information stored in the first storage device 75 for forming various kinds of predetermined stitch patterns as shown in FIGS. 8A to 8F and the control contents based on this information is as follows. As shown in FIGS. 9A to 9F.

That is, as shown in each "amplitude information" column of FIGS. 9A to 9F,
One oscillation amplitude information group corresponding to one stitch pattern is composed of six pieces of oscillation amplitude information corresponding to one stitch.Similarly, one oscillation amplitude information group corresponding to one blind pattern The information group is composed of six pieces of feed information corresponding to one stitch, as shown in each of the "feed information" columns in FIGS. 9A to 9F.

Therefore, one information group corresponding to various types of stitch patterns is composed of one swing amplitude information group and one feed information group.

Each swing amplitude information determines the amplitude of the horizontal swing of the sewing needle 9, that is, the needle position coordinates indicating the lowered position of the sewing needle 9 as shown in FIG. In each "needle position coordinate" column, numbers are written that represent the unique needle lowering position corresponding to each swing amplitude information as a coordinate point.

Further, each feed information is for giving a feed increment to the work cloth for forming each seam, and in each "feed increment" column in FIGS. 9A to F, a number representing the feed amount is written, And +
, the feeding direction is represented by one symbol.

Now, among the many types of stitch patterns shown in Fig. 8 A to F,
If the pattern selection switch S6 is selectively closed in order to form the cross-cut pattern shown in FIG. 8F, the information group shown in FIG. 9F is selected and validated.

The principle of formation of the cross-stitch pattern is based on the numbers (0) to (5) shown in the stitch pattern in Figure 8F. This is something that is repeated in units.

In this unit of pattern formation, as is clear from FIG. 9F, which shows the control details, the lowering position of the sewing needle 9 for forming each stitch from number (0) to number (5). are needle position coordinates (2) , (0) , (2) , (4
) , (6) , (4).

In addition, in the feed increment, the formation of stitch number (0) is
5) Feed increment (-5) for stitch number (0) after forming stitch number (5) because it is performed next after forming stitch number (5)
is given, and the feed increment is the needle position coordinate C2), (
0) , (2) , (4) , (6) , (4
), the feed increment is (-5), (+5), respectively.
, (+5) , (-5), (+5) p (
+5), and by giving such needle position coordinates and feed increments, the cross-cut pattern shown in FIG. 8F is formed.

The effect will be specifically described below.

That is, by closing the pattern selection switch S6,
A reset pulse RSP is generated from the reset output terminal 64, thereby causing the first to third address counters 7
1,72.73 is reset and its contents are in decimal (
0), only one selection line L6 among the selection lines L1 to L6, LP becomes high level, and as a result, first, the first amplitude information storage unit 16 in the first marking device 75 becomes Multiplexer 87 and first sending information storage section 77 ? The lexers 110 are enabled by receiving a positive potential signal at their respective selection input terminals ST.

At this time, the outputs of the first address counter 71 and the second address counter 72 are (the operation of the third address counter 73 will be described later).

) is "000" in binary code, and this is the address code for lines L31, L3, L34 and L41,
Each multiplexer 87 and 11 via L4, L44
0 address designation terminals X1, X2, and X4, and the input terminal P corresponding to the decimal number (0) of the address code.
o is selected.

In this state, if the sewing machine is started from needle top dead center, the time T after the sewing needle 9 descends, pierces the workpiece cloth, and passes through the upper surface 66 of the throat plate.

Then, the second address counter 72 counts the pulse CP3 that is synchronized with the fall of the feed control timing pulse FCP, and after this, the first address counter 71 counts the pulse CP3 that is synchronized with the falling edge of the feed control timing pulse FCP. At time T1 after coming out of the cloth, the operation of counting pulses CP2 synchronized with the falling edge of the amplitude control timing pulse CP starts.

Now, the count content of the first address counter 71 is (0)
In this case, the multiplexer 8 of the first amplitude information storage section 76
7 is input terminal P.

is selected, and this input terminal P.

Since the voltage 2 is input as the swing amplitude information through the signal line L66, the information output terminal Y6 of the multiplexer 81 is input to the input terminal P.

The information is output as is, and this is added to the positive input terminal of the comparator 125, and the signal corresponding to the current position of the amplitude control actuator 14, which is already supplied to the negative input terminal, is the feedback voltage from the potentiometer 48. Once compared, the differential voltage is applied to the coil 33 within the amplitude control actuator 14.

As a result, the bobbin 34 of the amplitude control actuator 14 moves in a direction according to the polarity of the differential voltage output from the comparator 125 until the differential voltage becomes zero, thereby causing the drive link 12 to move toward the sewing needle 9. The lowering position is controlled so that it is at the position of the needle position coordinate (2), and the position is (0) at the position of the needle position coordinate (2).
The number seam is formed.

Thereafter, when the sewing needle 9 reaches a position above the throat plate upper surface 66, the first address counter 71 receives the pulse CP2 generated at the fall of the amplitude control timing pulse BCP.
(Time TI) is counted and the count content changes from (0) to (
1) and the first amplitude information storage section 76? The input terminal P1 of the multiplexer 87 is selected, so that the voltage O supplied to the input terminal P1 via the signal line L64
■ is output as swing amplitude information from the information output terminal ¥6, which is given to the amplitude control actuator 14 via the amplitude control driver 98, and placed at the needle position coordinate (0) (
1) The second seam is formed.

Thereafter, in the same manner as above, the first address counter 71 counts the pulses CP2, and the counted contents are (2), (3),
(4) and (5), the signal line L66 p L67 p "62, L6
input terminals P2, P3' of multiplexer 87 via
Voltages 2V, 4V, 6V supplied to P4 and P5,
4V is sequentially output from the information output terminal Y6, and the needle position coordinates (2), (4), (6), (4) are sequentially set to (2), (3), (4), (5), respectively. ) stitches are formed.

On the other hand, the feed control of the workpiece cloth is performed in the following manner in connection with the above-described horizontal swing amplitude control of the sewing needle 9.

For convenience, feed control for forming stitch number (1) will be explained first.

During the period (To'rt) corresponding to the formation of the stitch No. (0) by the sewing needle 9, the near address counter 72
The count content is time T.

Since it has already changed to (1) by the pulse CP3 counted at , the input terminal P1 of the multiplexer 110 in the first feed storage section 77 is selected, and the voltage of the signal line L75 which is the feed information of the input terminal P1 is selected. Information output terminal Y14 as feed information where 6■ is the feed increment (+5)
is output from.

This output voltage is applied to the positive input terminal of the comparator 127 in the feed control driver 113, and is applied to the . It is compared with the feedback voltage from the potentiometer 46 corresponding to the current position, and the difference voltage is applied to the coil 33 in the feed control actuator 28.

As a result, the bobbin of the feed control actuator 28 moves in the direction corresponding to the polarity of the voltage difference until the voltage difference becomes zero, and the workpiece cloth moves during the period (0) after forming the stitch number (0).
During T2-T3), the feed device 15 increases the feed increment (+5
), and then the seam forming operation for one shield is performed as described above.

Thereafter, in the same manner as described above, the count values of the near dress counter 72 are changed to (2), (3),
By sequentially changing (4) and (5), the multiplexer 110 inputs the input terminal P2 fi Pa each time.
By sequentially selecting pP,,P,, 6V, OV, 6V, and 6V supplied through the signal lines "75p"76pL75p"75 are sequentially output from the information output terminal ¥14, In order, (2) and (3)
Feed increments (+5), (-5), (+5), (+5) for forming each stitch number, (4), and (5) are applied to the work cloth, and a second address counter is applied to the work cloth. After the count content of 72 returns from (5) to (0) and the stitches of (5) scans are formed, a feed increment (-5) is applied to the work cloth.

As described above, one unit of the cross-hatched pattern shown in FIG. The unit pattern is repeatedly and continuously formed.

The operation of forming the stitch patterns shown in FIGS. 8A to 8E by selectively closing the pattern selection switches S1 to S5 also follows the same principle as described above, and therefore the explanation of the operation will be omitted.

Next, a description will be given of an operation in which an operator uses the stored contents of the second storage device 78 as a program to form an arbitrary stitch pattern desired by the operator.

That is, the partial voltage variable resistor 114 protrudes outside the sewing machine frame 1.
The operating members 116o to 11615 of o to 114 and 5 correspond to each stitch of one stitch pattern consisting of 16 stitches.

The setting positions of these operating members 116o to 1161 (
The operator controls the operation members 116o to 116 so that the "oblique position" shown in FIG.
Operate 15.

This is performed by moving the operating members 116o to 1 1 615 in the left-right direction along each slit 118 formed in the sewing machine frame 1, and the amount of movement is determined using the scale 119 as a guide. The needle position coordinates of each stitch can be visually confirmed.

As shown in FIG. 1, the program related to feed control is executed when an operator moves the operating member 123 of the partial voltage variable resistor 120 in the second feed information storage section 80 protruding outside the sewing machine frame 1 to the sewing machine frame 1. This is done by moving along the formed slit 124, and the setting of the feed increment at this time is done by adjusting the intermediate position of the slit 124 and the symbol "R" or "
This is done by aligning the operating member 123 with the position of the numerical symbol in any area in the area between ``F''. be done.

In this example, the manipulation? Members 116o to 1 1 6
15 and the operating member 123 as shown in FIG. 1 indicates that a stitch pattern as shown in FIG. 10A is formed.

Operation members 116o to 1161. Each moving position along the slit 118 corresponds to the voltage dividing variable resistor 114o to 11
Since each signal line L8 corresponds to the sliding position of each slider 117 of 4 and 5, the divided voltage based on the resistance value corresponding to each sliding position is programmed as swing amplitude information.
Input terminals P are output to terminals P0 to L95, each of which corresponds to each stitch of the multiplexer 115.

to P15.

On the other hand, as the operating member 123 is aligned with the numerical symbol "2" in the "1F" region as shown in FIG.
The sliding terminal 122 of is moved, and a divided voltage based on the corresponding resistance value is constantly supplied to the input terminal P of the multiplexer 121 as feed information representing the feed increment (+2).

In this state, if you select and close the pattern selection switch SP,
Multiplexer 11 in second amplitude information storage section 79
5 is activated upon receiving a positive potential signal at its selection input terminal ST, and the multiplexer 121 in the second sending information storage section 80 is also activated upon receiving a positive potential signal at its selection input terminal ST. .

The third. The address counter 73 advances the operation of counting the amplitude control timing pulse CP2 as the upper shaft 5 rotates.

The count contents are from (0) to (1), (2), (
3)...(15), and the counting output is supplied to the addressing terminals X1, X2, X4, and X8 of the multiplexer 115 as a binary code.

to P15 in order, and the signal line "80 p
``81 p L3... Each divided voltage supplied via L95 is sequentially outputted to the information output terminal ¥7 as swing amplitude information of each stitch.

The analog signal, which is the divided voltage outputted to the information output terminal ¥7, is sequentially supplied to the amplitude control actuator 14 via the amplitude control driver 98 in the same manner as described above, thereby forming each of the 16 stitches. The horizontal swing amplitude control of the sewing needle 9 is performed.

On the other hand, the multiplexer 12 of the second sending information storage section 80
In 1, is the pattern selection switch SP closed? While this is being done, the divided voltage by the sliding terminal 122 of the voltage dividing variable resistor 120, that is, the analog signal corresponding to the feed increment (+2), is sent from the information output terminal ¥15 to the third address counter 73 as sending information. It is output regardless of the counting operation, and is supplied to the feed control actuator 28 via the feed control driver 113 to give a constant feed increment to the work cloth.

Through such feed control and swing amplitude control, one unit of stitch pattern shown in FIG. By repeating that the address counter 73 changes to (0) again and the third address counter 73 starts counting again, the above-mentioned unit flight form is continuously and repeatedly formed.

FIG. 10A merely shows one example of arbitrary stitch patterns formed according to the stored contents of the second storage device 78 programmed by operating the operating members 116o to 1165 and the operating section 123. In addition to the above, the stitch patterns illustrated in FIGS. 10B to 10E and any other stitch patterns desired by the operator can be freely formed.

In particular, in this embodiment, the second sending information storage unit 80
Although the description has been made assuming that the feed increment between each stitch constituting one stitch pattern is constant, the second feed information storage section 80 is configured based on the same principle as the second amplitude information storage section 79, Of course, by combining this with an address counter, it is possible to arbitrarily change the feed direction and feed amount of the work cloth between each stitch.

Next, the reason for the existence of the delay circuit 68 will be explained.

That is, when the feed information for forming one stitch is read by the address counter, the feed information is the time T immediately after the sewing needle 9 descends from the needle top dead center and pierces the work cloth.
.

This read out feed information is basically the feed information for forming the next stitch.

Now, if either of the pattern selection switches S4 and S6 is selectively closed while the sewing needle 9 is stuck in the workpiece cloth for some reason, the reset generated at the reset output terminal 64 at this time By pulse RST,
The first address counter 71 and the second address counter 72 are reset to the decimal (0) state.

However, the reset pulse RSP is delayed for a certain period of time by the delay circuit 68, and the amplitude control timing pulse B
CP's first novel period (time T shown in FIG. 5).

to time T1), a signal that temporarily falls to a low level is generated from the output terminal of the NAND circuit 70 during this period, and as a result of this fall, the second The count content of the address counter 72 changes to (1), and the feed information for the next stitch is read out.

In this way, a constant time relationship for readout between the feed information and the oscillation amplitude information is maintained as scheduled.

As is already clear from the embodiments described above, the following effects can be obtained according to the present invention.

In other words, it corresponds to a first storage device that stores a group of information corresponding to each stitch pattern in order to selectively form a variety of predetermined stitch patterns, as well as a pattern devised by the worker himself. A single sewing machine is equipped with a second memory device whose memory contents can be programmed to form stitch patterns to be used, and the sewing machine is equipped with a second storage device whose memory contents can be programmed to form stitch patterns that are predetermined in advance and any stitch pattern desired by the operator. Since the sewing machine can be selectively formed according to the contents stored in the storage device, the number of types of stitch patterns that can be formed with one sewing machine can be dramatically increased.

Furthermore, despite the enormous amount of information that comes with this,
Since the information is stored as a non-mechanical signal such as an electrical signal and processed electrically, the information is stored in the form of a non-mechanical signal such as an electrical signal. It is possible to prevent the mechanical structure from becoming complicated, enormous, and large in size, and it is generally inexpensive, and there are fewer mechanically worn parts, which reduces the frequency of maintenance and inspection, which is extremely convenient for sewing machines that form many types of stitch patterns. You can get the following effect.

Furthermore, since the configuration allows the shape of the stitch pattern to be visually confirmed by the operating position of the operating member that sets the information for forming each stitch in a given stitch pattern, the desired stitch pattern can be formed. This makes it extremely easy to create the corresponding information programmatically.

In addition, it is sufficient if the operating member can be set to move in the same number of stages as the number of lateral needle positions in the lateral direction, and there is no problem in operation even if the moving pitch is considerably small, so the installation area can be small, and space is limited. It is extremely useful for successful sewing machines.

[Brief explanation of drawings]

The drawings relate to one embodiment of the present invention; FIG. 1 is a perspective view of a sewing machine showing only the parts related to the present invention, FIG. 2 is a perspective view of its internal structure, and FIG. 3 is an exploded perspective view of the actuator. 4 is a block diagram for explaining the horizontal swing amplitude control of the sewing needle and the feed control of the work cloth, FIG. 5 is a tire chart for explaining the operation, and FIG.
8 is a wiring diagram showing the first and second amplitude information storage units together with their associated circuits; FIG. 1 is a wiring diagram showing the first and second sending information storage units together with their associated circuits; The figure shows a variety of predetermined seam patterns, Figure 9 shows the control details of the seam pattern shown in Figure 8, and Figure 10 shows the seams formed by the operator's program. It is a figure which illustrated a pattern. In the drawing, 5 is an upper shaft, 6 is a lower shaft, 7 is a main pulley, 8 is a needle swing device, 9 is a sewing needle, 10 is a swing support, 12 is a drive link, 14 is an amplitude control actuator, and 15 is a sewing needle. A feeding device, 16 a feeding drive shaft, 19 a cam holding rod, 20 a shaft, 2
3 is a feed dog, 24 is a grooved member, 24a is a lock shaft, 24
b is a lock arm, 26 is an adjustment rod, 28 is a feed control actuator, 30 is a permanent magnet plate, 33 is a coil, 34 is a bobbin, 44 is a rotating shaft, 46 is a potentiometer, 47
is a sliding shaft, 48 is a potentiometer, 49 is a pulse generator, 51 is a selection device, 81 to S6 and SP are pattern selection switches, 63 is a waveform conversion circuit, 68 is a delay circuit, BCP
is a timing pulse for amplitude control, FCP is a timing pulse for feed control, 71 is a first address counter (readout device), 72 is a second address counter (readout device), 73 is a third address counter (readout device) , 14 is a pulse distributor, 75 is a first storage device, 76
is a first amplitude information storage unit, 77 is a first sending information storage unit, 78 is a second storage device, 81 is a first multiplexer group, 88 is a signal source circuit, 92 to 94 are voltage dividing resistor groups, 9
8 is an amplitude control driver, 99 is a signal source circuit, 106 is a second multiplexer group, 113 is a feed control driver, 1
14o to 11415 are voltage dividing type variable resistors, 114 is an analog memory, 115 is a multiplexer, 116o to 11615 are operating members, 120 is a voltage dividing type variable resistor,
121 is a multiplexer, and 123 is an operating member.

Claims (1)

[Claims] 1. A sewing needle capable of vertical reciprocating movement and lateral rocking movement;
In a sewing machine equipped with a feed device for imparting a feed motion to the work cloth in synchronization with the vertical reciprocating movement of the sewing needle,
a first information storage section storing a predetermined group of information for controlling at least the lateral oscillating movement of the sewing needle in correspondence with each stitch pattern in order to form various kinds of predetermined stitch patterns; a storage device, and a direction of the lateral oscillating movement, which is provided corresponding to each stitch constituting an arbitrary stitch pattern desired by the operator, and is provided to set information for controlling the lateral oscillating movement. a large number of operating members movable in directions corresponding to , a second storage device that stores information groups set by the operating members, and a large number of information groups stored in the first storage device. and a selection device for selecting one information group from among the information groups stored in the second storage device and activating the selected information group, and a reciprocating vertical movement and coordination of the sewing needle. a pulse generator that occasionally generates a timing pulse; and a pulse generator that sequentially reads out required information from the information group validated by the selection device in response to the timing pulse, and is capable of repeatedly performing the readout operation. It consists of a readout device and an operation device that operates the sewing needle according to the information read out by the readout device. A sewing machine characterized by being able to confirm the following. 2. The second storage device is comprised of an analog memory having a large number of resistors each corresponding to each stitch constituting the stitch pattern and whose resistance value is variable according to an operator's operation; 2. The sewing machine according to claim 1, wherein a stitch pattern desired by an operator is formed by appropriately setting each resistance value.