JPS6157034B2 - - Google Patents

Description

Detailed Description of the Invention This invention stores sewing data in advance in a storage means such as a microcomputer, and operates an electric control means connected to a sewing mechanism based on the read sewing data to sew a predetermined shape. This invention relates to an electronic sewing machine that forms a pattern, and in particular to an invention for generating an information signal in a predetermined multi-bit binary code corresponding to the content of sewing information related to needle swing, cloth feed, or both. .

Embodiments of this invention will be described with reference to the drawings.

About the sewing machine mechanism The needle bar 2 with the needle 1 fixed at the lower end is attached to the sewing machine frame 3.
It is supported by the machine frame 3 so as to be movable up and down in conjunction with a sewing machine main shaft (not shown) connected to a motor (not shown) disposed inside the machine frame 3, and to be swingable in a direction crossing the cloth feeding direction.

A panel 4 provided on the front side of the machine frame 3 has display sections 5a to 5h graphically displaying a plurality of (eight types in this embodiment) sewing patterns, and a selection switch 6 for manually selecting one of the patterns. Place.

Although not shown, there is a detection means inside the machine frame 3 (see Fig.
NP) is arranged in relation to the main shaft, and at the same time, as described in JP-A No. 50-101160, a stem is connected to the fabric feeding mechanism to control both the forward and reverse fabric feeding directions and the amount of fabric feeding. A feed actuating means such as a ping motor and a needle swing actuating means such as a stepping motor connected to the needle bar 2 so as to control the swinging position of the needle bar 2 are arranged. In this embodiment, for convenience, the needle swing actuating means is set to swing the needle bar 2 to four positions a, b, c, and d.

About the electric circuit PS is a pattern selection circuit, for example,
It has a well-known configuration as disclosed in Japanese Patent No. 55264, etc., and in connection with the operation of the selection switch 6, selection signals are sequentially generated at output sections 1 to 1 corresponding to each sewing pattern. MC
is a microcomputer, which has a static memory (ROM), a dynamic memory (RAM), and a control circuit (CPU), and controls the needle swing and feed operation means to form each sewing pattern. By inputting a selection signal from the pattern selection circuit PS, the data of the corresponding sewing pattern is sequentially read out and output as a 6-bit code, of which 3 bits are sent as data to the needle swing actuating means. Once written to output registers X, Y, Z, output,
The remaining three bits are once written into output registers x, y, and z as data to the sending actuating means, and then output.

Calculation setting routine The microcomputer MC has six types (A, B, C, D,
E, F) calculation setting routine flow is stored, that is, the A setting routine (Fig. 3) is for generating an output (1010...) in which binary code "1" and "0" alternately repeat. It "determines" whether "A" is "1" or "0", and when it is "1", it is set to "0", and when it is "0", it is set to "1". The B setting routine (Fig. 4) is to generate an output (111000111...) that alternately repeats three "1"s and "0"s, and "judges" whether N (number of stitches) is 2 or not. If it is not 2, add 1 to that number (N=N+1), and if it is 2, set N to 0.
After setting it to “B”, “judge” whether “B” is “1” or “0”, and if it is “1”, set it to “0”, and “0”.
Set to "1" when . The C setting routine (Figure 5) is to generate an output (000001000001...) in which five "0"s occur and then one "1". "death,
If it is not 5, add 1 (N=N+
1) Then set "C" to "0", and when it is 5, set N to 0 and then set "C" to "1". The D setting routine is for always generating "1", and the E setting routine is for always generating "0". F setting routine (6th
Figure) is for generating an output (100100...) that produces one "1" and then two "0"s, and it "judges" whether N is 2 or not, and if it is not 2, then Add 1 (N=N+1) and then "F"
is set to "0", and when it is 2, N is set to 0, and "F" is set to "1".

Needle swing data A three-bit code is set in the swing positions a, b, c, and d of the needle bar 2 described above, which is a combination of predetermined binary codes corresponding to each position.
That is, if point a (000), point b (001), point c (010), and point d (011), each needle drop point of the eight types of sewing patterns (A and B in Fig. 7) of this example is The corresponding needle bar swing position codes are shown in FIGS. 8A and 8B.

For example, in Figure 8 A, which corresponds to the patterns shown in Figure 7 A a and B, the needle swing point is from the first stitch.
There is a 3-bit code corresponding to each of them: dcbabcdc... The output of one digit of those three-bit codes (vertical column in Figure 8) is “1010…” from the first stitch, and the output of the second digit is “11000111000.”
…”, and it can be seen that the output of the third digit is all “0”. According to this, the output of the first digit corresponds to the output of the A setting routine of the calculation setting routine, and the output of the second digit corresponds to the output of the A setting routine of the calculation setting routine. It can be seen that the third digit corresponds to the output of the setting routine, and the output of the third digit corresponds to the output of the E setting routine.

Therefore, for output registers X, Y, and Z, the first digit register X contains the output of the A setting routine, and the second digit register Y contains the output of the B setting routine.
By setting initial values and writing outputs based on the outputs of the E setting routine into the third digit register Z, a 3-bit code corresponding to each needle swing point is outputted by a combination of these outputs.

Similarly, pattern RO writes the output of "ECC" to register ZYX based on each setting routine for C, C, and E from the first digit, and pattern C uses the "" output, which is the inversion of the output of the C setting routine. writes the output of "E" to register ZYX, pattern 2 is the EBB setting routine, pattern HO is the EDD setting routine, pattern 5 is the EAA setting routine, pattern 7 is the EAD setting routine, pattern 1 is the EDA setting routine. A routine is used to write their outputs to registers X, Y, and Z to produce a three-bit code output.

Needle swing data generation flow The needle swing data generation flow shown in Figures 9 and 11 is stored in the microcomputer MC, and the flow in Figure 9 writes to output registers X, Y, and Z in accordance with the selected sewing pattern. This is a flowchart for setting the types of target setting routines A to E and their initial values. Immediately after this flow starts, "1" is written into registers X and Y by the D setting routine, and "0" is written into register Z by the E setting routine. Next, it is determined whether or not the selection switch 6 is turned on, and if it is not turned on, the selection flag is reset to 0, and the flow shown in FIG. If the flag is 0, the selection flag is set to 1, and then the selected sewing pattern is sequentially ``determined'' starting from A.

1 Pattern selection First, reset all pattern flags to 0 (AFR),
Next, set the initial values of "A" and "B" in the A, B setting routine to "1", set the initial stitch value N to 1, set the A pattern flag to "1", and then set "A" to the output register "1", "1" of "B" is written to the output register Y, and "0" of "E" is written to the output register Z.

2 B pattern selection Set the initial value of “C” in the above-mentioned AFR post-C setting routine to “0”, set the initial stitch value N to 5, set the B pattern flag to “1”, and then select the output register X,
Write “0” of “C” to Y and “0” of “E” to output register Z.

3 C pattern selection After AFR, set the initial value of "C" in the C setting routine to "0", set the initial value of N to 3, set the C pattern flag to "1", and then set "C" to output registers X and Y. Write “1” which is the inverted “0” of
Write “0” of “E” to register Z.

4 Select two patterns After AFR, set the initial value of “B” in the B setting routine to “1”, set the initial value of N to 0, set the two pattern flag to “1”, and then set “B” to registers X and Y. “1” and write “0” of “E” to register Z.

5 E Pattern selection After AFR, write "1" of "D" to registers X and Y, and "0" of "E" to register Z.

6 Pattern selection After AFR, set the initial value of “A” in the A setting routine to “1”, set the pattern flag to “1”, set “1” of “A” to registers X and Y, and set “1” to register Z. Write “0” for “E”.

7 Select pattern after AFR, set the initial value of “A” to “1”, set the pattern flag to “1”, set “1” of “D” to register X, and “1” of “A” to register Y. ”, writes “0” of “E” to register Z.

8 Pattern selection After AFR, set the initial value of “A” to “1”, set the pattern flag to “1”, set “1” of “A” to register X, and “1” of “D” to register Y. ”, writes “0” of “E” to register Z.

The flow in Figure 11 is a continuation of the flow in Figure 9, with output registers X, Y, and Z for each stitch driven by the sewing machine.
This is to set the needle swing data for.

Based on the generation of the lower position signal, it is determined whether the needle is at the lower position, that is, whether it is the read timing or not. If the needle is not at the lower position, the lower position flag is reset to "0" and the flow in Figure 9 is immediately selected. Returning to the "determination" of the switch, when it is in the lower position, the lower position flag is "determined". When the flag is "1", the process returns to the "determination" of the selection switch in the flowchart of FIG. 9, and when the flag is "0", each pattern flag is "determined" sequentially starting from A pattern.

1 When the A pattern is selected and the A pattern flag is "1", the A setting routine and the B setting routine are processed according to the settings in the flowchart of FIG. 9, and values based on the processing are written to output registers X and Y, respectively. At this time, "0" is always written to register Z based on the E setting routine.

2. When the B pattern is selected and the B pattern flag is "1", values based on the processing of the C setting routine are written into registers X and Y in the same way as described above.

3. When the C pattern is selected and the C pattern flag is "1", the value based on the processing of the C setting routine is inverted and written to registers X and Y.

4. When the D pattern is selected and the D pattern flag is "1", values based on the processing of the B setting routine are written into the registers X and Y.

5. When the F pattern is selected and the F pattern flag is "1", values based on the processing of the A setting routine are written into registers X and Y.

6. When the G pattern is selected and the G pattern flag is "1", write the value to the register Y based on the A setting routine.

7. When the Chi pattern is selected and the Chi pattern flag is "1", a value based on the processing of the A setting routine is written to the register X.

Feed data generation flow Pattern Ib with reverse feed stitches in this example,
For c and d, for convenience, the reverse feed pitch is the same as the normal feed pitch. Also, if the 3-bit code from the microcomputer MC, which is the feed data, is set to be "000" when forward direction feed and "001" when reverse direction feed, the feed data for pattern Ib will be "001" for the first stitch and "001" for the second stitch. This is repeated after the third stitch becomes “000” and the feed data for patterns C and D becomes “000” for the first stitch, “000” for the second stitch, and “001” for the third stitch. repeat. Therefore, since the feed data is always "000" in the patterns A, B, E, F, G, and J that only have forward feed, the output registers x, y, and z corresponding to each digit at this time are set to E. "0", which is the output of the routine, is written.

In addition, for pattern I b, the first digit of the three-bit code is "1", "0", and "0" repeatedly, which corresponds to the output of the F setting routine. Therefore, when selecting pattern I b, Set the initial value of "F" to "1" and the initial value of N to 0, write the "F" value to output register x, and output registers y and z always have "0", which is the output of the E setting routine. written.

In addition, in patterns C and D, the first digit of the three-bit code is “0”, “0”, and “1” repeatedly, so F
The initial value of “F” in the setting routine is “0” and N
The initial value is set to 1, the "F" value is written to the output register x, and "0", which is the output of the E setting routine, is always written to the output registers y and z.

For each stitch driven by the sewing machine, as shown in Fig. 12, it is determined whether or not the needle is placed in the upper position based on the generation of an upper position signal, and one of the pattern flags A, C, and D is set to "1". When , a value based on the processing of the F setting routine is written to register x.

Note that the output registers X, Y,
Z, x, y, and z are read out at predetermined times, that is, output registers X, Y, and Z are read out when the needle is located above the throat plate, and output registers It is read when the feed dog is located below the plate (feed dog descends).

The present invention has the above structure, and its operation will be explained next.

When the power is turned on, “D” is displayed in output registers X and Y.
Output "1""E" output "0" is written to output register Z, and "E" output "0" is written to output registers x, y, z, so the sewing machine performs normal feed at needle swing point d. It will be in a straight sewing state.

1 When selecting pattern a, the needle swing data is “A” = “1” at the initial setting,
"B" becomes "1", the output of registers ”, and the normal feed state is always set.
When the sewing machine is driven and the first needle d drops and a lower position signal is generated, "A" becomes "0" in the A setting routine, and the number of stitches N becomes 1 (by initial setting) in the B setting routine. Therefore, due to N+1, N=2 and "B" remains as 1. Therefore, the code of registers X, Y, and Z is “010
", and the needle bar 2 corresponds to the needle swing point C. When the lower position signal of the second needle C is generated, "A" becomes "1", and in the B setting routine, N is 2, so N=
Since it is set to 0 and “B” = “1”, “B” =
The code becomes "0", the codes of the registers X, Y, and Z become "001", and the needle bar 2 corresponds to the needle swing point b.
When the lower position signal of the third needle b is generated, "A" =
Then, in the B setting routine, N=1 due to N+1, and "B" remains unchanged as "0", and the codes of registers corresponds. At the lower position of the fourth needle a, “A” becomes “1”, and in the B setting routine, N=2 and “B” remains unchanged as “0”, and the codes of registers X, Y, and Z are “001”. This corresponds to needle swing point b. "A" at the lower position of the fifth needle b =
Since N is 2 in the B setting routine, N=0 and "B" is "0", so "B"
= "1", and the codes of registers X, Y, and Z become "010", which corresponds to needle swing point C. Thereafter, in the same manner, needle bar 2 is set based on the processing of the A and B setting routines.
is moved to a predetermined point.

2 When pattern A b is selected, the needle swing data is changed to A, Y, and Z from the code “011” of registers X, Y, and Z according to the initial setting, as in A above
A needle swinging operation is performed based on the processing of the B setting routine.

On the other hand, the feed data is “F” = “1” at the initial setting.
Therefore, the code of registers X, Y, and Z is “001”
Therefore, the cloth feed between the first needle and the second needle (d-c) is reverse feed. When an upper position signal between (d and c) is generated, in the F setting routine, N=0 (by initial setting), so N+1 becomes N=1, and "F" becomes "0", so register x,
The y and z codes are "000", and the feed between the second and third needles (c-b) is normal feed.

When the upper position signal between (c-b) is generated, N+
Since N=2 from 1 and "F" remains "0", normal feed continues between the third and fourth needles (ba). When the upper position signal between (b and a) is generated, N is set to 0 because N is 2, and "F" =
1, the codes of registers x, y, and z become "001", and the movement between the fourth and fifth hands (a-b) is reversed. Thereafter, in the same manner, reverse and forward feeding is sequentially repeated based on the processing of the F setting routine.

3 When selecting a pattern, the feed data is always set to normal feed with registers x, y, and z all set to "0."

For the needle swing data, "C" = 0 at the time of initial setting, the codes of registers x, y, and z become "000", needle bar 2 corresponds to needle swing point a, and the lower position signal of the first needle a When this occurs, in the C setting routine, since N is 5 (by initial setting), N=0 and "C"=1. Therefore, register X,
The Y and Z codes are "011" and the needle bar corresponds to point d. N=1 due to N+1 at the lower position of second needle d
and “C” becomes “0”, registers X,
The Y and Z codes are "000" and the needle bar 2 corresponds to point a. Then, "C" remains unchanged at "0" until N=5 at the seventh needle, and the needle bar 2 does not move beyond point a. Thereafter, similar needle swinging operations are performed based on the processing of the C setting routine as described above.

4 When selecting a C pattern At the time of initial setting, the needle swing data becomes “C” = “0”, its inverted output “1” is written to registers X and Y, and the codes of registers X, Y, and Z are “ 011'', the needle bar 2 corresponds to point d, the feed data is ``F'' = ``0'', and the codes of the registers x, y, z become ``000'', indicating a normal feeding state.

When the lower position signal of the first needle d is generated, the needle swing data becomes N=4 due to N+1 since N is 3 (by initial setting) in the C setting routine, and "C" becomes "0", and the registers X, Y, The Z code remains unchanged, and the needle swing point of needle bar 2 becomes point d. When the upper position signal between the first and second needles (d-d) is generated, the feed data is N because N is 1 (initial setting).
+1, N=2, and “F”=“0”,
The code of registers x, y, z is “000”,
Instructs the next cloth feed to be forward feed.

At the lower position of the second needle d, the needle swing data becomes N=5 and "C"="0", and the needle swing point becomes point d. In addition, the feed between the second and third needles (d-d) continues to be forwarded by the code "000" of the registers x, y, z, and the feed data is at the upper position between d and d. Since N is 2, N=0 and "F"="1", the codes of registers x, y, and z become "001", and the next cloth feed is instructed to be reverse feed.

At the lower position of the third needle d, the needle swing data is 5, so N = 0, and "C" = "1", so the codes of registers X, Y, Z become "000" and the needle bar 2 corresponds to point a, and (d-
Between a), the feed data (001) causes reverse feed, and the feed data is N+ at the upper position between d and a.
1, N=1 and "F" becomes "0", so the codes of registers x, y, and z become "000".

At the lower position of the fourth needle a, the needle swing data changes from N+1 to N=1 and "C" becomes "0", the codes of registers X, Y, and Z become "011" and the needle bar 2 returns to point d. Corresponding to this, this needle swing data does not change until N=5 in the eighth stitch. Between (a-d) of the fourth and fifth needles, normal feed is performed according to the feed data (000), and at the upper position between (a-d), N
+1, N=2, and "F" remains unchanged as "0", and the feed data instructs forward feed, and at the upper position between the fifth and sixth needles, N=0 and "F"="1". ”, the feed data instructs reverse feed, and at the upper position between the 6th and 7th needles, N = 1 and “F” = “0”.
This instructs forward feed, and therefore, the fabric feed from the fourth stitch to the eighth stitch is forward, reverse, and forward. Thereafter, in the same manner, needle swing data is processed based on the processing of the C setting routine, and feed data is processed based on the processing of the F setting routine.

5 When selecting pattern 2, at initial setting, the needle swing data is "B" = "1" and the code of registers X, Y, Z is "011", needle bar 2 corresponds to point d, and the feed data is "F"
= "0" and the codes of registers x, y, and z become "000" to instruct forward feed.

When the lower position signal of the first needle d is generated, the needle swing data is changed from N+1 to N=1 since N is 0 (initial setting) in the B setting routine, and "B" is "1".
remains unchanged, and the needle swing point becomes point d, and when an upper position signal between the first and second needles (d-d) is generated, the feed data is changed from N+1 to N since N is 1 (initial setting).
=2, and "F" remains unchanged as "0", instructing the next cloth feed to be normal feed.

At the lower position of the second needle d, the needle swing data changes from N+1 to N=2, and "B" = "1" remains unchanged, and the needle swing point becomes point d, and the second needle and third needle (d-d Since N is 2 in the send data at the upper position between ), N=0 and "F"="1" are set, and the codes of registers x, y, and z are set to "001" to instruct the next send to be reverse send.

At the lower position of the third needle d, the needle swing data is N=0 because N is 2, and "B"="1", so "B"=
Set the code to "0", set the code of registers is N
+1 sets N=1 and "F"="0", and sets the codes of registers x, y, and z to "000" to instruct the next cloth feed to be normal feed.

Similarly, the feed data is thereafter instructed to be fed repeatedly in the forward and reverse order based on the processing of the F setting routine.

The needle swing data generates data that indicates point a up to the 6th stitch, and since N is 2 at the lower position of the 6th stitch, N=
0 and since "B" is "0", "B" is set to "1", the codes of registers X, Y, and Z are set to "011", and needle bar 2 corresponds to point d. Thereafter, needle swing data is generated based on the B setting routine so that points a and d are replaced every three stitches.

The explanation of the straight stitch (E) and the zigzag stitch (F, T, C) will be omitted, but needle swing and feed data are generated in accordance with the processing of each setting routine, and based on that data, the swing actuating means, The feed actuation means are controlled.

In this embodiment, nine patterns in which the needle is oscillated at four points a, b, c, and d have been described, but other patterns or patterns having more oscillation points may be implemented.

Further, in this embodiment, sewing information for needle swing, feed, or both is formed using a 3-bit code, but it may also be represented using a code with a larger number of bits.

Further, in this embodiment, six setting routines A to F have been described, but any routine that generates an output that is repeated in a predetermined order as in this embodiment can be similarly used.

As described above, according to the present invention, the static storage means stores in advance a plurality of different arithmetic methods that output binary codes of combinations that are repeated in a predetermined order, and the code of the arithmetic method is stored in association with the generation of a detection signal. a progressive means for progressively increasing the output; a plurality of output registers capable of writing information signals corresponding to each bit of the information signal;
a setting means for making each calculation method of the static storage means correspond to a predetermined output register; a writing means for writing the output of each calculation method to the corresponding output register in relation to the generation of a detection signal; By providing readout means for reading out data from the output register at a predetermined timing in Since it is only necessary to store the information, the capacity of the storage means can be reduced, and the cost can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the sewing machine body, Fig. 2 is a block diagram of the electric circuit of this embodiment, Fig. 3 is a flowchart of the "A setting routine", Fig. 4 is a flowchart of the "B setting routine", Fig. 5 is a flowchart of the "C setting routine", Fig. 6 is a flowchart of the "F setting routine", numbers a to 7 in Figs. 7A and B are explanatory diagrams showing the needle drop points of each sewing pattern,
8A and 8B are explanatory diagrams in which the needle swing data for each pattern in FIGS. 7A and B are shown in 3-bit codes, arranged vertically and corresponded to output registers X, Y, and Z. FIG. 9 is a flowchart for initializing needle swing data, FIG. 10 is a flowchart for initializing feed data, and FIG. 11 is a flowchart for updating needle swing data each time a stitch is formed. FIG. 12 is a flowchart for updating feed data every time a stitch is formed.

Claims (1)

[Claims] 1. An information signal based on a predetermined multi-bit binary code corresponding to different sewing information related to needle swing, cloth feed, or both,
In a sewing machine that controls an electrically acting sewing mechanism control means, there is a pulse generator that generates a position signal related to the detection of a specific rotation angle of the main shaft, and a pulse generator that sequentially generates a binary code of a combination that is repeated in a predetermined order. Static storage means in which a plurality of arithmetic methods are stored in advance; a plurality of output registers that correspond to each bit of the information signal and are capable of writing data separately; and a pattern selection operation; a setting means for making each calculation method of the static storage means correspond to a particular output register in relation to a selection signal generated based on the position signal; and a progressive means associated for acting on and making the calculation method progressive in relation to the position signal. a writing means for writing the output of each calculation method as data in the corresponding output register in relation to the position signal; and a reading means for reading the data from the output register in synchronization with the rotation of the main shaft and applying it to the sewing mechanism control means. The information signal is characterized in that an arithmetic method is associated with each bit of an information signal composed of a plurality of bits, and the arithmetic output of a binary code that is repeated in a predetermined order is combined by an output register corresponding to each bit to form an information signal. Electronic sewing machine.