JPH0116197B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic sewing machine in which a stitch forming device performs pattern sewing in response to a pattern information signal.

In such a sewing machine, for example, a stitch forming device (pattern forming device) is configured that can variably adjust the operation of the needle and cloth feed within a predetermined range, and predetermined sewing pattern information is stored. The needle and cloth feed of the stitch forming device are positioned based on the sewing pattern information, and the sewing machine generates a predetermined sewing pattern.

Conventionally, this type of electronic sewing machine
-37554, JP-A-50-37555, etc. have been proposed.

In the conventional sewing machine described above, information on predetermined sewing patterns (pattern information) is stored in a read-only memory (ROM).
The signals extracted from the sewing machine were used to directly position the stitch forming device's needle and fabric feed, thereby causing the sewing machine to generate a sewing pattern.

In such electronic sewing machines, pattern signals for multiple types of patterns are stored in the ROM, the user individually selects the pattern he or she wants to sew, and the sewing machine generates the selected pattern. .

However, with this method, you have to select the pattern you want to sew each time you sew. In other words, you can only select a single pattern, and when you want to sew multiple patterns in succession, you have to select the next pattern each time the pattern changes. It is extremely inconvenient to use because it requires an operation to select a pattern.

To provide an electronic sewing machine that can automatically shift to sewing operations for different patterns in succession during sewing work by simply specifying the pattern order in advance when a plurality of types of patterns are to be sewn consecutively. It is.

That is, when the electronic sewing machine of the present invention has four types of patterns as shown in FIG. 1, for example, if the pattern order is specified as →→→,
As shown in (A), the sewing operation of these steps is performed continuously and the sewing operation is stopped, and then →→→→→→
If you specify →, the stitching will continue to sew and then stop as shown in (B).

The present invention will be described below with reference to an embodiment in the drawings. In FIG. 2, 1 is pattern information RY ₁ , RX ₁ , RY ₂ ,
_This is _a pattern storage device having RX ₂ .

As shown in Fig. 3, the pattern information RY ₁ and RX ₁ are information related to the Y-axis position and X-axis position at seam positions A and B, stored in binary code in step order. The side is positioning information for the needle in the left and right direction, and the RY side is information about the amount of cloth feed. For example, the seam position of A, which is the first step in Fig. 3, is Y=1,
X=5, and the stitch position of B, which is the second step, is Y=2, X=4, and the stitch position of C is Y=3, X=3.

Therefore, the first step, second step of RX ₁ ,
In the third step, the stitch positions on the X-axis are stored as they are as "00101,""00100," and "00011," and thereafter, the stitch positions on the X-axis are sequentially stored as absolute position information in binary code. On the other hand,
In the first step of RY ₁ , A's Y=1 and B's Y=2
In other words, the difference between B=2 and Y=3 of C is stored as "00001" in the second step. The relative position information, which is the difference from the previous step, is then stored sequentially.

This first performs the needle positioning set in the first step and performs the sewing operation, then performs the fabric feed set in the first step, and then performs the needle positioning set in the second step. This is a method in which sewing operations are performed in the order in which they are set.
In addition, each step of RX ₁ is stored as absolute position information in the same way as above, and regarding RY ₁ , Y=1 of A is stored as absolute position information as it is as "00001" in the first step, and relative position information is stored after the second step. In other words, in the second step, the difference between A's Y=1 and B's Y=2, ``1'', is stored as ``00001'', and in the third step, B's Y=2 and C's Y=3 are stored. It is also possible to store the difference as "0001" between the step and the previous step, and then store the relative information as the difference from the previous step.

This involves first performing the cloth feed set in the first step, then positioning the needle set in the first step to perform the sewing operation, and then performing the cloth feed set in the second step. This is a system in which the needle positioning set in the second step is performed after the pattern information has been adjusted, and various methods can be adopted as a specific method for storing the pattern information in the ROM 1.

D-2 performs digital-to-analog conversion on the outputs from the RX side and RY side of the ROM1, respectively.
The DA converter DAX corresponding to the RX side is input to the needle swing width adjustment section 4 of the stitch forming device 3, and the DA converter DAY corresponding to the RY side is input to the stitch forming device. It is introduced into the cloth feed adjustment section 5 of the device 3.

The stitch forming device 3 is a so-called mechanical part of a sewing machine, and is composed of a needle vertical drive device 6 including a synchronous pulse generating section, a needle swing width adjusting section 4, and a cloth feed adjusting section 5.

The needle up and down drive device 6, which includes this synchronized pulse generator, is configured to transmit the power of the motor 7 by operating a start switch SWK, which closes only when pressed, such as a foot switch, to perform the sewing operation. An output line 3A is led out which generates pulses in synchronization with the vertical movement of the needle.

The needle width adjustment section 4 adjusts the needle within a predetermined range.
That is, as shown in FIG. 3, it is movably adjusted in 32 steps in the X-axis direction.

The cloth feed adjustment section 5 feeds the cloth within a predetermined range.
That is, the feed is adjusted in 32 steps in the Y-axis direction of FIG. 3.

8 is an address counter of the ROM 1, which is input to the ROM 1 via a gate circuit (decoder) 9 in order to sequentially access pattern information.

The counter 8 is reset by a pulse generator _P0 that generates a one-shot pulse when the start switch SWK is closed, and the needle up and down drive device 6
Each time a synchronization pulse α arrives from the ROM 1, the pattern information in the ROM 1 is sequentially accessed through the gate circuit 9 up to N steps. Furthermore, it is of a ring counter type that automatically returns to the initial state when it counts up to N steps. The components of the counter 8 and gate circuit 9 control the address of the ROM 1.

10 is a keyboard with numerical keys;
It constitutes an operating means capable of specifying a plurality of types of patterns stored in the ROM 1, and its output is guided by the next introduction circuit. So this keyboard 1
The zero output is introduced into an encoder 11 and a circuit sequential pulse generator 12.

This encoder 11 encodes the key signal and introduces it to the AND gate _G1 .

Further, the circuit sequential pulse generator 12 sequentially derives the P ₁ signal and the P ₂ signal by inputting the key signal.
The _P1 signal and _P2 signal form the time chart shown in FIG. This _P2 signal is then introduced into AND gate _G1 . Therefore, the arrival of this P ₂ signal causes the AND gate G ₁ to conduct.

Reference numeral 13 denotes a storage device such as a shift register, random access memory, etc. In the embodiment, a shift register is shown, and a program for storing selection information (program pattern) of pattern patterns (1) to (16) specified by the operating means 10. Configure memory.

This program memory 13 is register X ₁
It consists of ~X ₂₀ and has a program capacity of 20 types. And register X ₂₀ is and gate G ₁
A signal is introduced from the controller 10, and the codes (1) to (16) of the pattern specified by the operating means 10 are lead-in. Also, register X ₂₀ is the decoder 14
It is connected to the gate circuit 9 and also to the display device 15 via.

Therefore, the contents of the program memory 13 are sequentially circulated through the circulation path via the AND gate _G2 , and the code information of the pattern introduced into the register _X20 is decoded by the decoder 14 and introduced into the gate circuit 9. As a result, one of the patterns (1) to (16) in ROM1 is designated.

Here, the configuration of the gate circuit 9 will be briefly explained with reference to FIG. Although FIG. 7 only partially shows the structure, the other parts have the same structure.

This gate circuit 9 includes a group of AND gates 911, 912...91N provided corresponding to each bit output of the address counter 8, and a group of AND gates 921 provided corresponding to each address position of the ROM 1.
~92N, 931~93N...

The AND gate groups 911, 912 to 91N are turned ON sequentially in response to the count contents of the counter 8.
-OFF scanned. In other words, when the count value of the address counter 8 is "0", only the AND gate 911 is turned on, and the count value is "1".
When the count value is "2", the AND gate 912 is ON, and when the count value is "2", the AND gate 913 is ON, and so on.

On the other hand, AND gate groups 921 to 92N, 931
~93N... is the output signal of the decoder 14 described above as one input, and the AND gate group 911, 912... is the other input.
91N output signal.

In other words, the AND gate group 921 to 92 corresponding to the address area of pattern (1) of ROM1
N is the input of the output 14a of the decoder 14 for selecting the pattern pattern (1), and AND gate groups 931 to 93N corresponding to the address area of the pattern pattern (2) are used to select the pattern pattern (2). Outputs 14b of the decoder 14 are inputted respectively. Moreover, the output of the AND gate 911 is input to the AND gates 921, 931, . . . corresponding to the first position of each address area, and the output of the AND gate 912 is input to the AND gates 922, 932, . are configured similarly.

Therefore, as the output from the decoder 14, 14a
is enabled and the AND gates 921 to 92N are selected, and when the counter 8 is reset and the count value becomes "0", the AND gate 911 is turned on and the output of this gate is introduced to the AND gate 921. The gate 921
Turn on, and as a result, pattern pattern (1) in ROM1
The first position of is addressed. Subsequently, when the counter 8 counts "1", the AND gate 912 and the AND gate 922 are turned on, respectively, and are operated as if the second position of the pattern (1) was addressed.

Returning again to FIG. 2, 16 is a shift circuit for controlling the shift of the program memory 13, into which the _P1 signal from the circuit sequential pulse generator 12 is introduced via the OR gate _G3 , and the _P1 signal is Program memory 13 registers for each arrival
Shift the contents of X ₁ to X ₂₀ one block at a time.

Further, the output from the switch 17, the output from the AND gate _G4 , and the output from the detection circuit JO are introduced into the shift circuit ₁₆ via an OR gate G3.

The switch 17 is used to independently shift the program memory 13. For example, when checking a program while looking at the display device 15, or by shifting an arbitrary pattern to the register X ₂₀ , a single pattern is displayed. It is used when you want to sew.

The output from the detector JC and the output from the mode changeover switch 18 are introduced into the AND gate _G4 . This detector JC detects and outputs that the counter 8 has accessed each pattern in the ROM 1 by N steps (all areas of the pattern), that is, has been counted up by N.
In addition, the mode changeover switch 18 is set when in the program mode in which multiple patterns (1) to (16) of the ROM 1 are specified and the sewing operation is performed.
It is turned ON and turned OFF when in manual mode for single stitching one of the patterns. Therefore, when the detector JC detects that the counter 8 has accessed the entire area of the pattern when the mode changeover switch 18 is in the program mode, the gate output of the AND gate _G4 is changed to the OR gate _G3.
The data is introduced into the shift circuit 16 via the shift circuit 16, which causes the shift circuit 16 to shift the contents of the program memory 13 by one block. and and gate
A shift is performed each time the gate output of G ₄ arrives.

The detection circuit JO detects whether the contents of the register X ₂₀ of the program memory ₁₃ are "0", and outputs _an output when the contents of the register Accordingly, the shift circuit 16 shifts the contents of the program memory 13 by one block. A shift is performed every time the output from this detection circuit JO arrives.

This means that the program memory 13 is 20 from X ₁ to X ₂₀ .
When you want to create a program with 20 types or less, use the operation means 10 to input ``0'' into the unprogrammed block by pressing the 0 key, and this ``0'' block is automatically filled. The pattern is shifted so that only the specified pattern is accessed.

19 is a clear key for clearing the contents of the program memory 13.

To explain the operation of the above configuration a little bit, first, key operations on the keyboard 10 are performed, and the ROM
1. Select patterns (1) to (16) and create a program. This involves selecting pattern patterns (1) to (16) using the numerical keys on the keyboard 10. If you now operate the numerical key □1 to specify pattern pattern (1), the key output will be sent to the encoder 11.
and are introduced into the circuit sequential pulse generator 12.

Therefore, in the circuit sequential pulse generator 12, first
P ₁ signal is output, and this P ₁ signal is the OR gate G ₄
The data is introduced into the shift circuit 16 via the program memory 13, and the program memory 13 is shifted by one block.

When the _P2 signal is generated following the _P1 signal, the AND gate _G1 becomes conductive and the key input is read into the register _X20 of the program memory 13.

Also, when you next operate the numeric key □2, register X ₂₀ of program memory 13 is
will be lead-in to. In this case, register X ₂₀
Since the _P1 signal is introduced into the shift circuit 16 by operating the key □2, the previous content introduced into the block is shifted by one block.

By operating the keys on the keyboard 10 in this manner, a desired program is created. In this case, the memory program 13 can contain 20 types of programs, X ₁ to X ₂₀ , but if there are fewer than 20 types of programs, enter "0" in the remaining blocks by operating the numeric key □0 on the keyboard 10. Lead-in.
Then, the first “1” specified in register X ₂₀
The content of is coming.

The contents of the lead-in by key operations on the keyboard 10 are displayed on the display device 15 at the time of lead-in, but if you want to check the contents of the program (program pattern) again after programming, you can shift by operating the switch 17. Activate circuit 16. As a result, the contents of the program memory 13 are sequentially shifted, and the contents introduced into the register X ₂₀ are sequentially displayed. After this confirmation,
Turn switch 17 OFF.

After assembling the program using the above operations, perform the sewing operation. In this case, first turn on the mode changeover switch 18 to set the program mode. Then, turn on the start switch SWK that performs the sewing operation.
Turn it on.

The motor 7 is driven by this ON operation of the start switch SWK, and the counter 8 is reset by the pulse from the pulse generator _P0 . Then, the needle vertical drive device 6 linked to the motor 7 is also driven, and a synchronization signal α synchronized with the vertical movement of the needle is output.

This synchronization signal α is the lowest position after passing through the cloth (a), the position immediately after leaving the cloth (b), and the highest position (c) shown in Fig. 5. The device is configured such that a pulse is generated at the location.

This synchronization signal α is introduced into a counter 8, and the counter 8 counts up each time the synchronization signal α arrives.

Therefore, as mentioned above, the program memory 13
The pattern pattern (1) of ROM1 is specified in _register access is performed sequentially.

That is, when the first step of pattern (1) is addressed first, the position information of the first step of RY ₁ and RY ₂ is sent to the D-A converters DAY and DAX.
The signal from DAY controls the fabric feed adjustment section 5 of the stitch forming device 3, and the signal from DAX controls the needle swing width adjustment section 4. Then, up to N steps are sequentially addressed to form pattern (1).

When the pattern (1) is addressed up to N steps, the detector JC detects this, and this detection output is input to the shift circuit 16 via the AND gate _G4 and the OR gate _G3 , and the program memory 13 is Shift by block.

With this shift operation, the second designated "2" is introduced into the register _X20 , and the pattern (2) of the ROM1 is designated. Further, the counter 8 becomes an initial state, and counts up every time the synchronization signal α arrives, sequentially addressing the pattern (2).

Repeat this operation to program memory 1.
Specified position (program pattern) stored in 3
The sewing operation is performed according to the following.

Currently, the capacity of the program memory 13 is 20 types, but when a series of sewing patterns is formed in a program with less than 20 types, the contents of register X ₂₀ become "0".

When the contents of this register X ₂₀ become "0", the detector JO detects this and activates the shift circuit 16 to shift the program memory 13.
Therefore, the program memory 13 is stored until the value of the pattern specified in register X ₂₀ arrives.
will be shifted.

If the start switch SWK is continued to be pressed, a series of program patterns will be repeatedly sewn continuously.

On the other hand, if you want to sew only a single pattern, that is, if you want to sew only the pattern (1) in ROM1, change the program mode, that is, turn off the switch 18.

If the desired pattern is stored in the program memory 13, the switch 17
is turned ON, and the program memory 13 is sequentially shifted to position the desired pattern in register _X20 . This operation is performed while looking at the display device 15.

In addition, if the desired pattern is not stored in the program memory 13, the keyboard 1
0 to introduce the desired pattern into register X ₂₀ .

Thereafter, when the start switch SWK is pressed, the designated patterns are sequentially addressed in the same manner as described above, and the stitch forming device 3 forms the specified patterns.

When this pattern is addressed up to N steps, the detector JC detects this, but since the switch 18 is currently in manual mode and is turned off, there is no gate output from the AND gate _G4 .

Therefore, the contents of the program memory 13 are not shifted, and the counter 8 returns to its initial state and sequentially addresses the same pattern again. Therefore, if the start switch SWK is continued to be pressed, a single pattern will be continuously formed.

In the above description of the program mode, the program pattern is formed continuously as the start switch SWK is continued to be operated, but the program pattern can also be completed in one go.

This is done by turning the start switch on as shown in Figure 6.
By operating SWK, a one-shot pulse is generated from pulse generator P ₀ and counter 8 is generated.
and flip-flop F/F.
set. Mode 7 is driven by the set output of the flip-flop F/F to move the needle of the stitch forming device up and down.

And register of program memory 13
The flip-flop F/F is output by the detection of "0" of the detector JO which detects whether the content of _X20 is "0" or not.
and stop the motor 7.

In other words, one program ends when "0" arrives at _register be able to.

The program memory 13 is designed to be able to combine 20 different patterns, but since all 20 patterns are not normally combined, "0" is added to the end of the program in the program memory 13. Since this was introduced, this was used for control.

As described above, the electronic sewing machine of the present invention is equipped with a static storage device such as a ROM that stores pattern information for multiple types of patterns to perform pattern sewing, and the multiple types of sewing patterns can be manipulated. A person arbitrarily selects and assembles a program, stores this program in a storage device (program memory), and automatically performs pattern sewing by sequentially addressing the pattern patterns in the static storage device according to this program. Therefore, this arbitrary programming essentially increases the variety of patterns beyond the pattern patterns in the static storage device, and the programmed patterns are automatically formed, making this operation extremely easy. It is simple and convenient to use.
Even when sewing only a series of programmed program patterns (single program pattern), it can be automatically stopped when this program pattern is completed, and the operator can control the sewing while watching the sewing operation. This single program pattern sewing can be easily performed since it does not require troublesome and difficult operations.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the operating state of the electronic sewing machine of the present invention, FIG. 2 is a block circuit diagram showing the configuration of the sewing machine, FIG. 3 is an explanatory diagram showing the relationship between pattern patterns and pattern information, and FIG. The figure is a time chart of various signals in Figure 2, Figure 5 is a configuration diagram showing the relationship between the vertical movement of the needle and the synchronization signal α, and Figure 6 is a main part showing another embodiment of the electronic sewing machine of the present invention. The configuration diagram, FIG. 7, is a specific configuration diagram of the address counter and gate circuit portions. 1: Static storage device (ROM), (1) to (1
6): Various patterns of ROM, 2: D-A converter, 3: Stitch forming device, 8: Counter,
9: Gate circuit, 10: Keyboard, 11: Encoder, 12: Circuit order pulse generator, 13: Program memory, 14: Decoder, 15: Display device, 16: Shift circuit, 18: Mode changeover switch.

Claims (1)

[Scope of Claims] 1. In an electronic sewing machine in which a stitch forming device executes pattern sewing in response to a pattern information signal, a pattern storage device stores pattern information for a plurality of types of patterns for performing the pattern sewing; When a desired pattern is selected from a plurality of patterns stored in the pattern storage device from the outside, the operation means for selecting the sewing pattern is activated, and the operation means for selecting the sewing pattern is activated prior to execution of pattern sewing operation. A storage device (program memory) that sequentially stores and holds sewing pattern selection information for a plurality of patterns whose selection instructions are input by successive operations; one of the selection information held in the storage device (program memory); means for controlling addresses of a pattern storage device for validating a corresponding pattern in a pattern storage device in response to selected pattern information and sequentially extracting pattern information of the pattern at the start of a sewing operation; Detection means for detecting whether extraction of pattern information for one pattern from a storage device has been completed; and said storage device (program memory) in response to detection by said detection means of completion of extraction of pattern information for one pattern. control means for the storage device (program memory) for controlling the means for performing address control to make valid a pattern in the pattern storage device corresponding to the next selection pattern information among the selection information held in the storage device; Detection means for detecting completion of retrieval of pattern information from a series of selection information held in a storage device controlled by the control means; stopping the sewing operation of the stitch forming device in response to the detection by the detection means; An electronic sewing machine comprising: means for controlling the address of the pattern storage device; and providing pattern information retrieved by the means for controlling the address of the pattern storage device to a stitch forming device and executing a single stitch based on a series of selected information.