JPS60108078A - Sewing machine enabled in mending - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a sewing machine capable of darning, and in particular, to prevent variations in the end positions of forward feed and rear end feed stitch rows (vertical stitches) constituting darning, The present invention relates to a sewing machine that can sew beautiful darning stitches in which the edge shape of the darning stitches is aligned on a straight line perpendicular to the feed direction of work cloth.

Prior Art A sewing machine is known which is equipped with a sewing needle capable of vertical reciprocating motion and horizontal rocking motion, and a feed thread capable of forward and backward feeding motion, and is capable of performing "ζ stitch tightening. In general, darning is a process in which forward stitch rows and backward stitch rows (vertical stitches) extending in both the front and back feed directions of the feed dog are alternately spaced apart in the direction of swing on the line side and are sewn in a predetermined number of rows. However, the actual feeding of the fabric is different in the forward direction and backward direction even if the stroke of the hem is the same. Generally, the difference is slightly different, and when a darning stitch is sewn on such a conventional sewing machine, a forward stitch row is followed by a reverse feed stitch with the same number of stitches or the same feed dog stroke. Even if the rows are sewn, the overall lengths of the (j1) and backward feed stitch rows will vary in the work cloth feed direction (j1) and the backward feed stitch row, and their end positions will be It is unavoidable that ζ variation occurs in the feeding direction. Therefore, in order to sew a 1.2 stitch-shaped darning in the front-back direction, for example, a W & tit line parallel to the front-back direction is formed from left to right. In case, Okuriyama's Okurisen I・t
When the force direction is in the +'+ij forward direction than in the backward direction,
i; qi; ↑ before 1%: 5 edge o, 1, after bi, 5H: H
However, the three shapes result in a right-handed stitch, and this inconvenience becomes more pronounced as the overall length of the darning increases.

In line with this, by setting and adjusting the respective feed amounts when forming the 11:I forward stitch row and backward feed stitch row, the shape of the edge of the darning can be made perpendicular to the work cloth feeding direction. It is conceivable to match them in a straight line, but in such a case, skill is required to adjust the feed amount, and trial sewing is required, which imposes a heavy burden on the operator.

Purpose of the Invention The present invention has been made against the background of the above circumstances,
The purpose is to provide a sewing machine that can easily form beautiful darning stitches without requiring adjustment of the feed amount or trial stitching.

Structure of the Invention In order to achieve the above object, the gist of the present invention is as follows: (1) The above-mentioned 1) forward feed stitch information and a storage device for storing backward feed stitch information; The positions of both the front and rear ends of the sewing are 1.1. a darning length setting device that operates by engaging with the darning fabric transferred by the feed pile in order to detect and generate front +1jf1 position signals and rear end position signals; 10 Specify the forward feed stitch information in the device at the rear end 0 position (5 in response to rj "j, and specify the backward feed stitch information in l1ii)) in response to the 11.1 position signal υ. and specifying means.

Effects of the Invention With this method, the positions of both the front and rear ends of the vertical stitching, which basically constitutes the darning, are actually detected by the darning length setting device, and the leading edge position signal generated as a result of the detection is detected. G: 1 rear end position: In response to the yt signal, warp and backward feed to form a stitch row in the j direction tiijl
, I information or forward feed pure l21 information is specified as the specifying means, 1
Therefore, regardless of the dispersion in the feed efficiency of the +ii + rear direction of the feed dog, the end A1 device of the forward feed stitch row and the backward feed stitch row is applied. [The front 11j is matched in the feed direction of the hammer j.
Beautiful darning stitches can be easily sewn without the need for troublesome feed adjustment operations in i, t;, l, and backward directions or trial stitching.

EXAMPLE Hereinafter, an example of the present invention will be described in detail based on the drawings.

In FIG. 1, the sewing machine includes a base portion 10, a sleeve 14, and a head 16 formed at the other end of the arm portion 14. The head 16 is provided with four rods 18 that are reciprocated in the vertical direction with the rotation of a main shaft (not shown) and are also swung laterally by a known side rod rocking drive mechanism (not shown). A sewing needle 20 is attached to the L bar 18. In the vicinity of the needle drop point on the line side 20 of the base portion 10, there is a well-known machine (not shown) that is driven in synchronization with the rotation of a main shaft (not shown) to feed the work cloth in the front-rear direction, and whose cloth feed direction and feed amount are controlled by a known needle (not shown). A feed dog 21 is provided which is adjusted by a feed adjuster drive mechanism. Further, on the front surface of the arm portion 14, a pattern display device 26 is provided with various shapes 22 representing sewing patterns 1 and 22 and a plurality of light emitting diodes 24 corresponding to the shapes 22, respectively.
is removed, and on the right side of the pattern display 26, a pattern selection mark #11211 is provided. Then, press the start/stop button 1130 to start or stop the sewing machine every time the head 16θ month jiI &, l l11 + pressure is operated.
is provided, and a sewing machine motor 3 is provided on the pillar portion 12.
A second speed setting device 34 is provided for setting the second rotational speed.

As shown in Figure 2, near the secondary rod ■8 of the head 1G,
B1 Presser presser 3 that can be raised and lowered by the lowering operation of the Ministry of Industry
0 is disposed, and below αj; 1 is a known button ball presser device 38. The presser frame 40 and the inner side of the presser frame 40 The presser body 42 is slidably engaged in the longitudinal direction and taken by the presser bar 36, and the +L + contraction i + J function fitted and -U adjustment plate 44. Also,
Inside the head 16, a switch device 52 is provided with an arm 50 that selectively engages a fixed piece 46 fixed to the presser frame 40 and a movable piece 48 fixed to the adjustment plate 44. When the distance between the fixed piece 46 and the movable piece 48 is set to a desired distance corresponding to the entire length of the darning, the distance between the fixed piece 46 and the movable piece 48 is set by expanding and contracting the adjusting plate 44, which is provided and is also an operating body for setting the darning length. , a fixed piece 46 and an arm 50 are provided at the front end of the darning, and a movable piece 48 is provided at the rear end of the darning.
By engaging the arm 50 with the arm 50, the switch device 52 generates a front end position signal and a rear end position signal, respectively. Therefore, the presser foot device 38 and the switch device 52 form a length setting device that sets the length of the darning stitch. The switch device 52 and the presser foot device 38 are the same as those described in a previous application filed by the present applicant (Japanese Unexamined Patent Publication No. 166888/1988), so detailed explanations will be omitted.

The sewing machine configured as described above is equipped with a circuit shown in FIG. 3.

In the figure, a pattern signal S, which is the content of the bar number, is output from a counter 54 that is progressively incremented each time the pattern selection push button 28 is pressed.
M is the display driver 56. Start address memory 5) (3 Discriminator 60. Supplied to buttonhole controller 6 [j. Display current is supplied from the display driver 56 to the light emitting diode 24 corresponding to the splash-like signal SM, and it emits light. be set.

Of course, the operator can sequentially move the light emitting position of the light emitting diode 24 each time the pattern selection button 1u28 is pressed, and the operator can also select the shape representing the desired stitch 1). Each time the light emitting diode 1°24 is emitted,
It is possible to select the pattern of the second Lj.

Tip 1: There is a sewable pattern (k
(excluding η stitch and button ball stitch) are stored, and a series of stitch data for stitching a desired pattern is stored in the stitch data native device [; 2, the leading address L7 corresponding to the pattern signal SM is supplied from the leading address memory 58 to the first boat P1 of the multiplex lottery 64.

In the discriminator 60, it is determined whether the pattern signal SM is a buttonhole stitch or a darning, and if the pattern signal SM is a buttonhole stitch, the first discrimination signal PS1 is sent, and if it is a darning stitch, the second discrimination signal is sent. PS2 is generated -U. The first discrimination signal P S 11 is supplied to the J button ball controller 6G, and is also supplied to the multiplexer 64, causing the multiplexer 64 to select the second ball 1-P2. Further, while the second discrimination signal P2 is supplied to the darning controller 68, it is also supplied to the multiplexer 70, and the second discrimination signal P2 is supplied to the multiplexer 70 to
) Select B.

The stitch data generator 62 receives a timing signal TPF from a timing generator 72 according to the timing shown in FIG.
and T)))B are supplied, and in the stitch data generating device 62, a series of stitch data stored at addresses below the first address supplied via the multiplexer 64 are output to the timing signals 1゛PF and TPB. are generated in synchronization with , and are supplied to the actuator T-1f-f4 via the multiplexer 70.

One stitch data tel: #lf=Old position data SN representing the swing position of the hook 20, 1, and feed data SF representing the feed amount and feed direction of the work cloth, and the timing In response to the signal 1'PF, the feed data SF is input to the input capacitor of the multiplexer 11-70, and in response to the timing signal TPB, the needle position data SN is input to the multiplexer 11-70.
1-PA. In the Akboop:1Nita dryer 74, driving power is supplied to the training swing actuator 76 and the feed active actuator 78 based on the old position data SN and the feed data SF. The needle swing actuator 76 drives the needle swing mechanism, and sews it 20 at the position represented by the old position data SN.
Position -1. Further, the feed actuator 7B is for driving the feed 61mm 1 section, and sends the feed data S.
Determine the rotational position of the feed adjuster so that the feed amount and feed direction of the cloth are 17 indicated by F.

A 1-inch flip-flop 80 that enters a seven-point or reset state each time the start/stop pushbutton 30 is pressed.
From there, a starting signal ST corresponding to the set state is supplied to the motor drive control circuit 82, and also to the button ball controller 6G and the darning controller 68. In the motor drive control circuit 82, while the drive signal sT is being supplied, the difference between the rotational speed set by the speed setter 34 and the actual speed φi of the sewing machine motor 32 detected by the speed detector 84 is detected. The electric power supplied to the sewing machine motor 32 is controlled so that the electric power is zero, and the sewing machine motor 32 rotates at a constant speed regardless of load fluctuations.
I get kicked. Then, when the supply of the start signal sT is stopped, the supply of the '9M dynamic force to the sewing machine motor 32 is stopped, and the sewing machine motor 32 is stopped. In addition, the above T
The automatic stop signals ASI and As2 outputted from the button ball controller 66 and the darning controller 68 are supplied to the type flip-flop 1 flip-flop 80 via an OR gate 86, and the type 1 flip-flop 80 automatically stops them. At the same time as the signal ASI or As2 is supplied, the reset state is set and the sensor 2 is automatically stopped.

Therefore, when a button ball or a pattern other than Cat darning is selected by operating the pattern selection push button 28, the manual boat P
1 is selected, and the start address corresponding to the stitch data generator 62 is supplied from the start address memory 58 via the multiplexer 64 to the stitch data generator 62. Stop push button 30 is pressed r+', ++"4
When the sewing machine motor 32 is synchronously driven as sewing is performed, the timing signal TPF and l'l' + (or 1f
fi ``l'' is supplied to the data generation device 62, and the data completion device 62 generates a series of stitch data for sewing a desired sewing pattern 1.
1 F O, LBI T I) When the same 1υ rotation is applied to B and every 2 degrees, the multiplexer 7o is set to the manual boat 1) Since A is selected, the stitch data is sent to the multiplexer 70. The signal is supplied to the actuator driver 74 via the signal. Therefore, the stitch position for each stitch is determined by the needle swing actuator 76 and the feed actuator 78 in accordance with each stitch data, and the desired pattern is sewn onto the work cloth. be.

On the other hand, when the presser foot device 38 is attached to the presser rod 36, the switch device 52 is activated and the front end signal SF
W and rear end signal SRE are the button ball controller 6
6 and a darning controller 68, respectively.

The button ball controller 66 is
The sequence circuit is similar to the sequence circuit for button-ball sewing and bar-tack sewing described in Japanese Patent No. 166888, so a detailed explanation will be omitted. The respective leading addresses for sewing the constituent sewing steps are determined by the full end signals S, FW, the trailing end signal SRE, the timing signal TPF, the start signal ST, and the end signal of each step supplied from the stitch data generator 62. The second port P2 of the multiplexer 64 is supplied based on υSSE.

In addition, so that the start address output from the button ball controller (j6 is row 1) in the unmarked address counter in the stitch data generator 62, 1 code 1-borrowed SL is set to button ball control 1!-ra 6G. -C is supplied to the stitch data generator-62 from -C.

Therefore, press C1 pattern selection & 1. + When the start/stop push button 30 is operated when the ``ζζ button ball is selected by the operation of 28, the first discrimination signal 1''S1 output from the discriminator 60 causes the multiplexer to select the second Since P2 is selected, the output destination 11
nAls stitch data generator 62-・Each sewing step/
supplied in advance of the process. Then, when each step of buttonhole 1'' is sewn, presser foot device 38 presses gl! Corresponding to the setting II) position of the J section plate 44, button ball sewing of the desired length is applied.
formed into l. At the end of the formation, the self'PJ+ (
':' If the sewing machine motor 32
is automatically (:!+L).The length of the button ball stitch is determined by the rear end of the adjustment plate 44 of the presser foot device 38,
The necessary and sufficient length is determined by sandwiching the actual button between the protrusions formed at the rear end of the presser frame 40.

Next, the darning controller 68 is configured as shown in FIG. 5, for example. That is, addresses 1 and 6 are output from the address setter 88.

Address signals representing addresses 1 and 5, respectively, are sent to the first port P1 . 2nd boat P2゜3rd boat 1
-1) Each is supplied to 3 and can be used for multiple cooking! In I90, when the boat select signal G1 is being supplied, the human-powered boat P1 is being supplied, and when the select signal G2 is being supplied, the human-powered boat P2 is being supplied with the boat select signal G1.
However, in the state where the select signal G3 is being supplied, the third person capo-1-P3 is selected, and each address signal output from the 7-trace setter 88 is selected. The data is supplied to the address counter 92 automatically. Boat Select G2. G3 generates a timing signal tpF, +1ij end signal sFw. in the boat selection signal generator 94.
f. & exit signal SRR, and activation timing signal S I) i''A; and end r discrimination signal S E
Based on I), the sewing step for vertical stitching, horizontal stitching, and locking stitches, and the opening and opening of
- Select signals G1, G2. G3 is now generated.

1- The boat selection signal generator 94 is configured as shown in FIG. 6, for example. However, the output signal of the top 96 which is set to the set state by the start timing signal +,ySI)T is output as the 71 meet select signal 61, while the boat select
- Rear end υSR F. is supplied to the frequency division counter 100, where it is multiplied by δ1. The frequency division counter I00 is an octal frequency division counter, and at the same time as the rear end Shingetsu SR [L is released 8 times 81 times, the Keetley signal is supplied to the Frisopf 1-1 knob 1) 6, and the Frisopf 1, top () [i
is set to a reset state, and the boat select signal is also supplied to flip-flops 102 and 104, which are set. The output row of the flip-flop 102 is used as the boat select signal G2, and the timing TP is
F is provided to a divider counter 108 and is an argument therein. The frequency division counter 108 is also an octal frequency division counter,
The contents of the 81 numbers are input to the comparator 110.
C is sequentially supplied. Input capo I/PA of comparator 110
and PB from the numerical value setter 112 to [-3] and “
7'' are supplied respectively, and the comparator 11
In 2, when the content of the signal supplied from the divider counter 108 represents "3" or "7", a coincidence signal is generated, which is passed through the antgame 1-1 1 4 opened by the front end signal SFW. The signal is supplied to a monomulti circuit 116. The monomulti circuit 116 supplies a pulse responsive to the generation of the coincidence signal to the flip-flop 102 to reset it, and then supplies the boat select signal G2 to the flip-flop 11B to reset it. The state is set to psoI and a boat select signal G3 is generated. This flip-flop 118 is
~12 Rec 1 - Ant game opened by Shin υ G3 - 1
- Completion determination signal 51 (I) supplied via 120'
According to -1, it is set to lyse and 1 state. That is, in the boat j Tatsumi IR (H~) generator 94, the boat 1. i?rect signal G1 is continuously generated until the rear end signal SRE is generated eight times during the vertical stitching process. −
When the υ and the other forces are used, the content of the li number of the dividing counter 10)) is "3" or "7" in the horizontal stitching that follows that process, and if the li number content is "3" or "7",
]; When the misaligned horizontal stitch is composed of 4 stitches, 1 number, the position of 12o reaches the right i) N, i or the left end, and the front α11.; Nobuo SFW occurs. Sa l
Select the boat until 4, and then press the end γ at the tie stitch following the horizontal stitch.
Published Besshin I Bow SI! ．． The boat select signal G3 is continuously generated until the signal G3 is generated. The output of the flip-flop 104 is configured to ensure that the contents of the divider counter 108 are reset to zero when the boat select signal G2 is generated following the boat select signal Gl. column is input to the reset terminal of the frequency divider counter 108. A pulse signal outputted from the mono multi-circuit 122 in response to the falling edge of the timing signal TPF is applied to the reset input terminal R of the flip-flop 104 via an analog gate 1-1-2-4 which is opened according to the output row of the flip-flop 104. When the boat select signal G2 is generated, the frequency division counter 108 is kept in a reset state until a certain period of time has elapsed from the fall of the timing signal 1''PF.

Returning to FIG. 5, the address counter 92 is supplied with the count signal SCK from the count signal generator 126. This supply section row ScK receives a timing signal T'I) at the front end position or rear end position of the darning during the vertical sewing state.
F is generated in synchronization with timing signal TPF, while it is generated in response to timing signal TPF during horizontal stitching or tacking stitching. That is, for example, as shown in FIG. 7, the timing signal TPF is equal to the rear end signal SR.
The OR gate 132 is supplied to the OR gate 132 through the AND gate 1130 opened by the front end signal SFW, and the OR gate 12B opened by the front end signal SFW.
The output of 3 2 is connected to the OR □ game 1N through the ant game 1- 1 3 4 which is opened by the boat select signal G1.
36 and is used as the 81 number signal SCK.

Moreover, the timing signal TPF is the boat select [signal G2
Antogame II38 is opened by ``Antogame II38'' and Antogame 1-14 is opened by boat select signal G3.
0 through or gate 1 3 [i to (J(supplied,
Each of them is made into an 81 number signal SCK.

In FIG. 5, a starting signal ST is supplied to a mono multi-circuit 144 via an AND gate 142 opened by a front end signal SFW, and in the mono multi-circuit 144, a starting timing signal of a constant pulse width is generated in response to the starting signal ST. SPT is generated and supplied to the clear terminal CL of the address counter 92, while being supplied to a launch circuit 148 (described later) via an OR gate 146.
Furthermore, it is supplied to a boat selection signal generation circuit 94 and a latch circuit 164. In addition, the address counter 92
The output signal of the monomulti circuit 150 activated in response to the boat select signal G3 and the termination determination signal SED are supplied to the load input terminal LD of the or game 1-152 as the load signal SLD.

The address counter 92 is a preset counter that counts the count signal SCK, and is a preset counter that counts the start timing signal SPT.
In response to this, the contents of the 64 numbers are cleared, and in response to the load signal SLD, the address signal selectively supplied from the multiplexer 90 is +-1''.

This address counter 92 is stored in the darning data memory 154 as a means for writing 1. (It forms a means for specifying forward feed and backward feed stitch information in response to the rear end position signal SRE and front end position signals S1 and W, and the address counter 1). The kR11 data of the concatenation not shown in the table is supplied to the pre-recorded gooning data register 154, and the old number signals S01-1:, Li-12q L,' (sequential address I-J A series of stitch data is sequentially generated by .The stitch data is composed of old position data SN and feed data FD, respectively.
is directly supplied to the input port PB of the multiplexer '4I70, while the old position data ND is supplied to the discriminator 156, while the multiplexer 158 and the launch circuit 1
The input port of said multiplexer 70 by 4B [)
It is supplied to I3.

In the first table determination s:::156, the needle position data N
1] is data specifically representing the 4th position, or the side increment 1
It is determined whether it is an h command or an end command, and if it is needle position data, the boat select is one full multiplexer 15.
8, causing the person's capo-1 to switch from pH to PC. In addition, if the content force 11 increment command of multi-1 position data Nl) is multi-1 increment/)3'lt command a No.
I N is supplied to the arithmetic unit 160 and step 2. :1:ri,1.
1 position 5' - TA F D Ka & % complete Tn order T: 'J:
r Zr LQ, the above X. Is the r discrimination signal SED Bo 1 - Liao + R signal light cow? ! :j! l 4 is supplied to the address counter 9 as a single code signal SLD.
2.

−, /j. A certain old increment corresponding to the interval between each stitch row of vertical stitching is inputted from Table 11Jj (representing a dimension of about 0.61, for example) from the total 1 increment setter 162 to the arithmetic unit L (position). Ut is supplied, and the result of the operation is not expressed. i! i calculation? , :; r (i 0 to latch circuit I
G4 f! 1 input terminal. Launch circuit 164
The contents of the launch circuit 164 are cleared in accordance with the activation timing signal sp'r, and the contents of the launch circuit 164 are supplied to the input capo-1 PH of the multiplexer 158 and the second input terminal of the arithmetic unit 160. This computing unit 1
60 adds the numerical value represented by the signal supplied to its second input terminal to the numerical value represented by the signal supplied to its first input terminal in accordance with the total one increment command signal SIH outputted from the discriminator 156. It is something. Therefore, each time the needle increment command signal SIN is supplied to the arithmetic unit 160, the output signal of the latch circuit 164 is set to a value obtained by adding the numerical value set by the needle increment setting device 162. Note that the launch circuit 164 performs an operation B l every time the addition operation of the arithmetic unit 160 is executed according to a signal (not shown).
It is configured to latch the addition result of 60. Further, the launch circuit 148 converts the device data ND formed by the multiplexer 158 into a timing signal T P B
The needle position data ND is sent to the multiplexer 70 in synchronization with the feed data FI) so that the timing at which the needle position data ND is output is shifted by approximately 180 degrees.

Hereinafter, according to the pattern selection push button 28, JfJ
The operation in the case where the darning is selected by the light emitting diode 124 disposed on the right α11.1 of the figure /I':J:'j 26 will be explained.

If the pattern signal SM output from the non-knit 54 is for darning, the second
Since the 'l'l separate signal 1) S2 is output, the multiplexer '1I70 selects ζ that person's capo-1-PB. Therefore, the needle swing actuator 76 and the feed actuator 78 are controlled by the darning controller 9.
Device data ND and sending data F consisting of 6 days
I). Note that in this state, the front end signal SFW is output from the switch device 52.

In the above condition, start/stop push button 3゜0)15
When the sewing machine motor 32 is activated,
First, according to the activation timing signal sTP, the solinopf l
:I '719G is set to the 1- state and the contents of the boat select signal-less counter 1]2 are cleared, so the stitch data address 00 of the first table stored in the darning mark 7154 is specified. be done. Therefore, the needle position data N representing the initial position l is stored from the darning data memory 154.
D is supplied to the discriminator 156 and the multiplexer 158, and the feed data FD representing the feed amount in the backward direction by a predetermined amount (for example, about 2111) is supplied to the multiplexer 7.
o. Since the discriminator 156 discriminates that the content of the needle position data ND is data representing a specific position of 31 and 1, the multiplexer 158 selects the input boat PL in accordance with the boat select signal SI)S. Meanwhile, in the launch circuit 148, hand position data representing the hand position L1 is latched in accordance with the activation timing signal sp'r, and the latched contents are supplied to the multiplexer 7o. As a result, 31 in Figure 8
The stitch shown in is first formed, and then the rear end signal SR
The backward stitch row is formed at a predetermined backward pitch until E is generated.

In the above state, the switch device 52 outputs the rear end signal SR.
As E is generated -1, a seam s2 is formed, and the count content of grouper 100 is set to 1, and the count content of grouper 100 is set to 1, and the seam s2 is formed. 126 to δ11 signal SC+< is generated -l
The 81 content of the -7F response counter 92 is set to 1. As a result of this, it is written in Darning Demon Seventh 15:1,
l('y data shown in Table 1; %ill
! Feed data (FI) where II is set and the feed amount is zero
is output from the -''-ning data memory 154.
Both r+ and above do not indicate the order of n1 increment 1, but the old position data N
D: '-Discriminator 15 from Jung data memory 154
[3 and multiplex lottery/15))]

At this time, the discriminator 156 generates and recognizes the increment command sequence sIN, so the
The side increment (62, for example, about 6 n+lN) set in the increment setter 1 [; 1
64. Here, since the content of the old position data L'D is not data indicating a specific old position, the person's capo 11' I+ is selected in the multiplexer 15B, and the latched content of the launch circuit 164 is transferred to the multiplexer 158. The signal is transferred to the launch circuit 14B through the gate, where it is latched in response to the timing signal TPH. Therefore, the signal supplied to the actuator driver 74 has signal content for moving the needle one increment (about 0.6 mm), while the content of the feed signal SF represents the feed amount of zero, so Following stitch S2 in Figure 8,
3 is formed.

Since the stitch S3 is in the same position as the stitch S2 in the workpiece cloth feeding direction, the rear end signal 5Rix is still generated from the switch device 52, and in this state, the timing signal TPF is is subsequently generated, the ni number signal S CK is output from the it number signal generator 126.
is further supplied to the address force counter 92, and the content of the address counter 92 is set to 2. As a result, address 2 of the darning data memory 154 is designated, and a predetermined amount (21
At the same time, the feed data FD representing the feed amount of
1 in 5; and is supplied to multiplexer 158. Since the content of the skew position data ND is the old fixed command, '1'
Subetsu+'+: From 1156, Boat Select 1's
ps is not output. For this reason, multiplex! I
'15 B is the human-powered boat as in the nii episode ■) 11
remains selected. Moreover, since the discriminator 15G does not output the multi-1 increment/)1 command signal SIN, the contents of the launch circuit 164 are not changed, and the lunch time is reached! ? 31
The same contents as last time are latched again in 48, and the diagonal position data N1. ) is placed diagonally and the t1 increment (
The value obtained by adding the N method of 11.6as) is the order 1i/,! The content is considered to be. As a result, the switch device 52
The front end signal SFW is generated from 71 to 71, and 11 rows of forward feed stitches are formed at a predetermined pitch (21111 degrees) - (i.e., the formation time point c b, + i of stitch S3).
In response to the occurrence of this end message 51713, L7 returns Ji7 and returns the forward end force - the forward feed stitch row that forms the stitches (stitches 83 to 83).
The forward feed stitch information for sewing S4) is specified.

Continuing () When the front edge signal SFW is generated at the same time as the stitch S4 in FIG. At the same time, the needle position data N is output without indicating the needle increment command.
, D are output.

As a result, the needle increment output from the needle position increment setter 162 is newly added to the value corresponding to one needle increment already launched in the launch circuit 164 in the arithmetic unit 160, and the latched contents of the latch circuit 164 are changed. The value corresponds to two needle increments. As a result, the contents of the launch circuit 164 are transferred to the launch circuit 148 via the multiplexer 158, and the contents of the data supplied to the actuator driver 74 are set to a value corresponding to two needle increments, as shown in FIG. Eye S5 is formed. Subsequently, after forming the stitch S5, the 4 number signal SCK is further supplied to the address counter 92, so that address 4 of the darning data memory 154 is designated, and the backward stitch row following the stitch S5 is set to a predetermined value (approximately 2 ml). The rear end signal S l? is formed until the rear signal SRE is generated at a rear pitch of . At the same time as Ij is released, seam S
6 is formed. At the time of forming the seam S5, the front wheel signal SF\rJ is generated by 1! ~S6) 'Ha-made thread ζ' information for one-by-one retraction stitches 1, 1 is specified.

At the same time as "tiffit" S6 is formed, the address counter 92 is further incremented by the number hl, and address 5 of the darning data memory 154 is designated. As a result, the skew position data ND is supplied to the discriminator 156 without indicating the final Y command, so that the discriminator 156 outputs the final Y command υS It L.
+ is generated/l, and A1-” is added to the response counter 92.
An r-l signal SLD is provided. At this time, since the boat select signal representing the vertical stitching period is input and the signal representing the address 1 set in the ISless setter 83 is supplied from the multiplexer 90 to the address counter 92, That l
The signal representing the tR ground is l:I in the A]Ruskan Uta 92.
- be treated. Therefore, riii stitches S2 to 3
The stitches following No. 5 are simultaneously and repeatedly formed starting from stitch S6. Note that when the nIJ stitch S6 is formed and the rear end signal SRE is generated, the count content of the frequency division counter 100 is set to 2.

While the above operations are repeated, when the count content of the frequency division counter 100 reaches 8 and sewing of the vertical stitch 166 is completed, in other words, when the formation of the stitch S30 in FIG. 8 is completed, the frequency division counter 100 Since the carry signal is generated from the flip-flop 96, the flip-flop 96 is set to the reset state, and the boat select signal G1 is extinguished, while the flip-knob flop 102 is set to the center state, and the boat select gates 106 and 138 are opened. Therefore, in the frequency division counter 108, the timing signal TPF is continuously set to 8.
It is counted as 1.

At this time, the second boat P2 of the multiplexer 90 is selected by the boat select signal G2, so in the address counter 92, after the stitch S30 is formed,
At the same time as the count reaches 5, an address signal indicating address 6 is loaded, and then the count is changed to 7 and 8, and addresses 6, 7, and 8 of Darnifugu Data Memo January 54 are specified one after another. be done. As a result, the feed data F
1j is maintained to represent a feed amount of zero, while the contents of old position data ND are maintained to represent the old position 1-73. L2. Ll
``1 addition'' 2 (ii
With respect to the feed direction of
°C needle position ii': i L 3 , I-2, L l
(J) At Jl, stitch 'V3S3i, S32.333 is formed to the left. Next, Gu Yung Data Memo January 54
When address 9 is specified, the contents of the old position data ND are
1 position 1°l, and the content of the feed data FI) is assumed to represent a predetermined feed amount (approximately 1 am) in the forward direction, so the same old position L1
One stitch 334 is formed in the ilh direction.

And then, there is further darning data memory IC+
, If, 12.133 address is specified - J Teii
1 position L 2. l-3, L4 seam S35゜S36
．． S37 is formed to the right. In addition, in FIGS. 31-1 and 9, the right and left sides in the figures are the front and rear sides as seen from the work stone, and the second and lower sides are the right and left sides as seen from the worker.

When the stitch 538 in FIG. 9 is formed and address 144 of the darning data memory 154 is specified, the contents of the needle position data ND represent a termination command.
A termination determination signal SED is output from the discriminator 156, and a load signal SLD is supplied to the address counter 92. At this time, since the boat selection signal G2 is supplied from the boat selection signal generator 94 to the multiplexer 90, the address signal representing address 6 output from the address setter 88 is selected from the multiplexer 90, and the address It is supplied to the counter 92.

Therefore, a signal representing the 6th address is loaded into the address counter 92, and the stitch data following the 6th address is then output again from the darning data memory 154 in synchronization with the timing signal TPF. Therefore, a series of stitches following stitches S30 to S38 are repeatedly formed using stitch 338 as a new starting point, and the level 168 shown in FIG.
It is formed in a state where it is overlapped with the vertical stitch 166 in the figure.

”-kii! In the process of forming y(i+↑168), if the n1 number content of the frequency division counter 108 becomes "3" or "7", and the old position of the diversion counter becomes L l or L 4, the 1 sea articulator If it is from 110, the match signal is andgoo L
It is repeatedly supplied to I I 4. In a state where such matching borrowing is occurring, horizontal stitching 16
8 is executed for a predetermined amount, and the front end signal S is output from the switch device 52.
When the FW is generated, the analog gate 1114 is opened, so that a predetermined pulse signal is supplied from the monomulti circuit 11[j to the Frisopf 1, 17, 1()2, and the Frisopfs 1 and 17 are reset. As a result, the boat select signal G2 is erased and CI is turned on, and the frisopf1 knob 118 is set, and the boat select signal '7G3 is generated. In FIG. 9, the state in which the seam SN is formed shows the second state. When the boat select signal G3 is emitted, the switch 90
Boat 1) 3 is selected, and a signal representing the 15fls ground set in the -7 tres setter 88 is supplied to the address counter 92, while the boat 1-select signal G3
The load signal SLD is applied to the address counter 92 (J
Therefore, the contents of the address counter 92 are incremented to 15 in synchronization with the timing signal TPF, and the darning data memory 1.54 is set to address 155. No. 16,
It is designated as number 17. At this time, the content of the needle position data ND is a multi-1 fixed command, so the actual needle position is L4.
．． or fixed to Ll (LL in this example),
Since the content of the feed data FD is a minute amount in the backward direction, a stitch slightly spaced apart in the backward direction is formed following the stitch SN. In this way, the fixing stitch 17 shown in FIG.
0 is formed. Darning data memory 15
When address 199 of No. 4 is specified, the content of the needle position data ND is used as an end command, so the discriminator 156 outputs an end determination signal SED, and the game 1-120 is opened. Therefore, the flip-flop 118 is brought into a reset state and the boat select signal G3 is eliminated. 1 at the falling edge of the left signal G3.
3ΔS2 is supplied to the T-type flip-flop I knob 80 via the OR gate 86, and the F-type flip-flop 11 knob 80 is in the reset state. Therefore, the sewing machine motor 32 is automatically stopped.For ease of understanding, the tacking stitch 17'0 shown in FIG.
Iil is shifted downward in the figure from 1, but in reality it is formed overlappingly on the 1st side position Ll.

In this way, according to this embodiment, in the vertical stitching 166, which basically constitutes the opening stitch, the lengths of the 1117 forward feed stitch row and the backward feed stitch row are photoelectrically transmitted from the switch device 52. Front end signal sFw and rear end q s R+t
Since ζ is determined according to
It is positioned exactly one in ten in a straight line perpendicular to the work cloth feeding direction. Therefore, in order to form the front and rear ends of the darning beautifully, there is no need to adjust the feed amount in the forward and backward directions or to test stitch, making it extremely easy to form beautiful darning stitches. .

Here, in the circuit shown in FIG. 3 described above, a part or all of the circuit surrounded by a dashed line is also configured as a so-called microcoybuke and is IH.

Further, the switch device 52 that outputs the front end signal SFW and the rear end signal SRE is not limited to a contact type, but may also be configured as a non-contact type or a photoelectric type. Also,
Various forms of the presser foot device 38 may be adopted. In short, any device that detects the actual amount of movement of the work cloth and generates a signal υ- at a predetermined front end position and rear end position is sufficient.

The above-mentioned embodiment is merely one embodiment of the present invention, and various modifications may be made to the present invention without departing from the spirit thereof.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a sewing machine to which the present invention is applied. FIG. 2 is a partially cutaway perspective view showing in detail the vicinity of the head of the embodiment shown in FIG. 1. FIG. 3 is a block diagram showing a circuit provided in the embodiment of FIG. 1. FIG. 4 is a timing chart illustrating timing signals output from the timing signal generator of FIG. 3. FIG. 5 is a block diagram showing the configuration of the darning controller shown in FIG. 3. FIG. 6 is a block diagram showing the configuration of the boat selection signal generator of FIG. 5. FIG. 7 is a block diagram showing the configuration of the count signal generator of FIG. 5. FIGS. 8 and 9 are diagrams respectively showing warp stitches and cross stitches constituting one sewing step of the darning stitch formed by the embodiment of FIG. 1. 44: Adjustment board (IE! creation) 92 Near address counter (specifying means) 154: Darning data memory (storage device)
Brother Industries Co., Ltd.

Claims (1)

[Claims] 1-1.Forward feed mechanism 1 (equipped with a sewing needle capable of motion and lateral rocking movement, and a feed dog capable of feeding movement in both front and rear blade directions, and extending in both the front and rear feed directions of the feed θ)
-1 row and backward feed stitch row have 1 interval in the line side swing direction.
-1 to 16" and 11% of the predetermined rows are formed alternately
11: In a sewing machine that performs 1j; 1 forward feed stitch information and rear 1F feed stitch 1 to form a forward feed 1lli stitch row and a backward feed stitch row, respectively.
It has a storage device that records the 118th report, and an operation section that can be operated to set the length of the darning in the feeding direction of the feed dog, and the front and rear end positions of the darning of the set length. 1 position signal and the rear end position signal are detected in response to the rear end position signal, and the forward feed stitch information in the stored value (δ) is transferred to the front end. 1. A sewing machine capable of darning, comprising: designating means for designating in response to a position signal, and forming each stitch row according to the designated stitch information.