JPH062193B2 - Sewing condition limiting device for electronic sewing machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a seam adjusting device for a sewing machine capable of forming a plurality of seam patterns.

(Prior Art) When adjusting the needle swing amount or the cloth feed amount, it is necessary to set a reduction limit value for a character pattern such as an alphabet because it becomes difficult to understand the shape of the pattern if it is reduced too much. On the other hand, when both the needle swing amount and the cloth feed are reduced by each adjusting operation device, the shape of the pattern is relatively easy to understand, but if only one side is reduced, it becomes difficult to understand even if the size is not reduced so much. Therefore, if both reduction limit values are set with reference to the case where only one is reduced, the limit value becomes too large when both are reduced, and the adjustment range is narrowed, which is not preferable.

(Object and Solving Means) According to the present invention, the adjustable range of the cloth feed amount, which forms one direction, for example, the character width of a character pattern such as an alphabet, is such that when adjusting the cloth feed amount, the adjustment value of the needle swing width amount is It is set within the specified limit value considering how it is, and the adjustable range of the needle swing amount is set in the same way considering the adjustment value of the cloth feed amount. In this manner, the amount of needle swing and the cloth feed are adjusted unbalanced and the pattern is prevented from becoming excessive.

(Examples) Examples of the present invention will be described below with reference to the drawings. In FIG. 2, the front panel (1) is provided on the front surface of a sewing machine (not shown). The pattern selection device (2) comprises four pattern selection switches (S ₁ ) to (S ₄ ), and the pattern selected by the switch (S ₄ ) is a character pattern. The amplitude adjustment designating switch (3)
After that, the needle swing width can be adjusted by operating the up switch (4) and the down switch (5). The display device (6) consists of a bar-shaped electronic display divided into 8 sections, and when the swing width adjustment designating switch (3) is operated, the maximum swing value that the sewing machine enables is 7 mm. When
The total length of the bar corresponds to the maximum swing value of 7 millimeters, and one or more adjacent to each other are simultaneously illuminated and displayed as a bar, starting from the left end section marked with 0.
Each time the up switch (4) is operated, the number of lights is sequentially increased, and the down switch (5) is likewise decreased.
The feed adjustment designation switch (7) enables the feed adjustment by operating the up switch (8) and the down switch (9) thereafter by operating the selected patterns. This feed amount corresponds to a maximum feed amount of 3.5 mm, as indicated by markings of 0 to 3. Indicator light (10) (1
1)) is for displaying that any one of the switches (3) and (4) is operated and each adjustment is effective.

FIG. 1 is a control circuit diagram, and in the figure, a pattern selection device.
(2) typically shows only the switch (S ₄ ), but the output line is set to L level by operating each switch. When the power is turned on, switch (S ₁ ) is set as the initial setting.
And the pattern number storage device (12) operate in the same manner.

Based on the operation of the pattern selection device (2), the data read start address of the pattern data storage device (13) is specified, and the common range and feed of each stitch of the pattern are specified from the auto data storage device (14). Output each auto data B _A , F _A. The automatic data B _A , F _A form an automatic set value of a coefficient for adjusting and calculating each stitch data from the pattern data storage device (13) in the pattern data calculation device (15). The up and down switches (16) and (17) for swing and feed are set to
15 is repeatedly counted, and the rising signal following the selection operation of the pattern selection device (2) which has received the auto data B _A and F _A respectively, is loaded through the AND circuit (18) to the load terminal.
Load each when received in (L). The flip-flop (19) is initially set when the power is turned on or is set by the operation of the pattern selection device (2), and thereafter the output Q of each of the OR circuits (20) to (23) becomes L level. When it is prohibited and the amplitude adjustment designating switch (3) or the feed adjustment designating switch (7) is operated, it is reset through the AND circuit (24) to enable each OR circuit (20) to (23). . The flip-flop (25) is reset via the AND circuit (26) by operating each switch (S ₁ ) to (S ₃ ) of the pattern selection device (2), and set by operating the switch (S ₄ ).
Each AND circuit or OR circuit (27) to (30) is enabled for the outputs of the comparators (31) to (34) described later. Each OR circuit
(35) to (38) receive the operation signal of each up switch or down switch (4) (5) (8) (9) and up the counter (16) or (17) for each L level, As will be described later, each of the comparators (31) to (34) stops this in a timely manner. The flip-flop (39) is set when the power is turned on, and thereafter, which of the switches (3) and (7) is operated is discriminated, and when the switch (3) is operated, the OR circuits (20) to (). 21) is enabled, and when the switch (7) is operated, the OR circuits (22) to (23) are enabled. The feed amount calculator (40) outputs the output Q of the flip-flop (25) to the terminal (Dis).
And the switch (S ₄ ) of the pattern selection device (2) is operated, the output of the swing counter (16) is activated.
The value F _H according to the upper limit value and the lower limit of the feed amount regulating undergoing B _'A,
F _L is calculated, and the calculation is performed by the formula F _H = B ′ _A × 2,
The _{F L = B 'A × 0.5} , each fraction is to be rounded off. In the feed adjustment limit value setting device (41), the value calculated by the feed amount calculator (40) is 15 for the upper limit value F _H.
And F _'H intact values when within, and outputs 15 to the upper limit comparator (33) for feeding a uniform 15 when exceeded. Then the raw value when the 5 above lower limit value F _L and F _'L, when the 4 following outputs to uniformly lower comparator for feeding a 5 (34). Swing amount calculator (42),
The amplitude adjustment limit setting device (43) has the same configuration as the feed amount calculator (40) and the feed adjustment limit value setting device (41) including the arithmetic expressions, and the values B ′ _H and B ′ _L are Upper limit comparator for swing
(31) and the lower limit comparator (32). Comparator (31) compares the _H value B 'the value B of _A and Fuhaba regulatory limit setting device (43)' of the counter (16), at the H level when it becomes B 'A _{B' H} , The AND circuit (27) and the OR circuit (35) are used to invalidate the count-up input of the counter (16),
The counting is stopped. The comparator (32) in the same manner, B disable the countdown input of the L level when a 'A _{B' L} counter (16) and allowed to stop the counting. Comparator _{(33), F 'A F' H}
In the H level, the comparator (34) becomes the L level at F 'A _{F' L,} similarly, each allowed to stop the counting of the counter (17). The switching device (44) switches the display content of the display device (6) between the counter (16) and the value (17) according to the output of the flip-flop (39). The AND gate (45) causes the display device (6) to display only when the adjustment designating switch (3) or (7) is operated according to the output of the flip-flop (19). The decoder (46) converts the value of the counter (16) or (17) into display data for the display device (6). The indicator lights (10) and (11) are controlled to light via AND circuits (47) and (48), respectively, and the adjustment switches (3) and (7) are operated, respectively. Is displayed. The pattern forming device (47) receives a stitch control signal for each stitch from the pattern data calculation device (15) and forms a pattern.

The operation relating to the adjustment of the character pattern in the above configuration will be described. When the pattern selection switch (S ₄ ) is operated, the second
The pattern of the alphabet "A" in the figure is selected.
That is, the flip-flops (19) (25) (39) are set, the pattern number storage device (12) specifies the start address of the pattern to the pattern data storage device (13), and the automatic data storage device For (14), output the amplitude automatic data B _A and the feed automatic data F _A of the pattern. Auto data B _A , F _A
Are set to 10 each, and this data is
When (S ₄ ) continues to be released, the load terminals (L) of the counters (16) and (17) receive the rising signal and are loaded respectively. By the counter (16) (17) the value B _{'A, F'} A flip-flop (19) A is a 10 each, which is given to the pattern data processing unit (15) so up and down input is disabled Te, after each stitch control data from the pattern data storage unit _{(13) B 'a = 10} , F' a =
The pattern is set to a standard adjustment value based on the automatic set value by 10, and the pattern is formed in a standard size by the pattern forming device (49).

Next, following the operation of the switch (S ₄ ), or to adjust the amplitude during sewing, the amplitude adjustment specification switch
When (3) is operated, the flip-flop (19) is reset, the flip-flop (39) remains set, and the indicator lamp (10) lights up. Value of counter (16) (17) _B'A ,
Each of _F'A is 10, and the display unit (6) illuminates and displays the display portions of the number markers 0 to 5 in FIG. The feed amount calculator (40) has a calculation formula F _H = B ′ _A × 2, F _L =
F _H = 20 and F _L = 5 are calculated by B ′ _A × 0.5, and the feed adjustment limit value setting device (41) outputs F ′ _H = 15 and F ′ _L = 5. Similarly Fuhaba adjusted limit value setting device (43) is outputting _{B 'H = 15, B'} L = 5. At this time,
For example, an up switch to enlarge the pattern in the swing direction
(4) the operation to the the _H 'output B of the _A and Fuhaba adjusted limit value setting device (43)' the operation every counter (16) comparators for counting up upper limit (31) is the output B Compare. When the output B _'A is 15, the comparator (31) becomes the H level, the count-up is stopped. At this time, indicator light (10)
The display units of the numerical representations 0 to 7 are lit up and displayed, and the pattern data calculation device (15) thereafter controls the swing width to the maximum size. Next, when the down switch (5) is operated to reduce the pattern in the swing direction, the counter (16) counts down with each operation, and the lower limit comparator (32)
Compares the _L 'output B of the _A and Fuhaba adjusted limit value setting device (43)' the output B. The output B _'A comparator and is 5 (32) becomes H level, the countdown is stopped.

Next, when the feed adjustment designation switch (7) is operated to adjust the feed from this state, the flip-flop (39) is reset and the indicator lamp (11) lights up. Counter (16) (1
Value B _{'A, F'} of 7) _A is not a 5 and 10, respectively, on the display device (6) display unit from numeric marks 0 to 5 is displayed lit. The feed amount calculator (40) has F _H = B ′ _A × 2, F _H = 10, and F _L = B ′ _A × 0.5, _FL = 3, and the feed adjustment limit value setting device (41) is F ′. _H = 10, F '
_L = 5 is output. Thus the same manner as described above, when operating the up switch (8) to count up the counter (17), counting up is stopped when the output F _'A is 10. Countdown stops Similarly, if the output F _'A operates the down switch (9) is 5. This is because the amplitude adjustment value is relatively small,
This means that the upper limit value of the feed adjustment is limited to a relatively small value, and the lower limit value can be reduced to the value limited by the feed adjustment limit value setting device (41).

(Effect) As described above, according to the present invention, the swing and the feed are adjusted in a wide range with good balance, and the pattern is not too small.

[Brief description of drawings]

FIG. 1 is a control circuit diagram showing an embodiment of the present invention, and FIG. 2 is an external view of a front panel. In the figure, (2) is a pattern selection device,
Switches (4) and (5) are amplitude adjustment operation devices, switches (8) and (9) are feed adjustment operation devices, (13) is pattern data storage device, (15) is pattern data calculation device, and (16) is vibration device. Width counter, (17) feed counter, (31) to (34) comparators, feed amount calculator (4
0), the feed adjustment limit value setting device (41) is a cloth feed amount allowable range setting device, a swing amount calculator (42), and a swing adjustment limit value setting device (4
3) is a needle swing range adjustable range setting device.

Claims (1)

[Claims] 1. A storage device for electronically storing stitch width control signals of a plurality of patterns and respective stitch control signals for cloth feed, and a pattern selection device for selecting a desired pattern from the plurality of patterns by operation. And a swing width adjusting operation device that is operated by a key to adjust the needle swing amount of the pattern selected by the pattern selecting device in proportion to each stitch of the pattern, and the pattern selecting device. For the pattern, the feed adjustment operation device is operated by key to adjust the cloth feed amount proportionally to each stitch of the pattern, and preset to each unique value for the needle width and cloth feed of the selected pattern. Based on the values of the amplitude counter and the feed counter, and the amplitude counter for increasing or decreasing the preset value for each key operation, and within a predetermined cloth feed amount adjustment limit value. And a needle for setting the adjustable range of the needle swing width based on the value of the feed counter and within a predetermined needle swing width adjustment limit value. The amplitude amount adjustable range setting device and the values of the amplitude counter or the feed counter set by the needle amplitude amount adjustable range setting device or the cloth feed amount adjustable range setting device are Each comparator for stopping the counting of the amplitude counter or the feed counter when it matches the set value and each count value of the amplitude counter and the feed counter are stored in the memory. An electronic sewing machine provided with a pattern data arithmetic unit for increasing / decreasing each stitch control signal read out from the device in proportion to each stitch and outputting the same to a pattern forming device. Sewing conditions limiting device.