JPH0518596B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a stitch adjustment device for a sewing machine that is capable of forming a plurality of stitch patterns.

(Prior art) In a sewing machine in which the needle swing width or cloth feed amount is adjusted sequentially with each key operation, the predetermined adjustment range can be adjusted with fewer operations. Furthermore, it is not preferable to make the amount of change in adjustment for a unit operation too fine. On the other hand, the adjustment function required fairly fine adjustment, and it was not possible to satisfy both of these functions.

(Objective and Solution) The present invention firstly provides coarse adjustment by operating the stitch adjustment operation section after once operating the adjustment specification operation section, and operation of the seam adjustment operation section while operating the adjustment specification operation section. There are two types of adjustment modes: fine adjustment and fine adjustment.There is no restriction on the order of operation, and coarse adjustment or fine adjustment can be performed freely.Secondly, increasing and decreasing adjustment operations can be freely performed during coarse adjustment. Go to
Thirdly, increasing and decreasing adjustment operations can be freely performed during fine adjustment, and the needle swing width and cloth feed amount of the sewing machine can be adjusted quickly and with high precision through simple operations.

(Example) An example of the present invention will be described based on the drawings. In Figure 1, the front panel 1 is a sewing machine (not shown).
is located in front of the. The pattern selection operation device 2 consists of four pattern selection switches _S1 to _S4 . By operating the needle width adjustment designating switch 3, it is possible to subsequently adjust the needle width by operating the up switch 4 and down switch 5 for the selected pattern. The display device 6 consists of a bar-shaped electric light display divided into 8 sections, and when the width adjustment designation switch 3 is operated, when the pattern in question is at the maximum width value of 7 mm that the sewing machine is capable of,
The entire length of the bar corresponds to the maximum amplitude value of 7 mm, and starting from the left end section marked with 0, one or more adjacent bars are lit at the same time to display a bar, and the up switch 4 is operated. Each time, the number of lights is increased sequentially, and the down switch 5 is turned on.
Similarly, it is reduced by If the up switch 4 and the down switch 5 are operated after releasing the swing width adjustment designation switch 3, each time the up switch 4 and the down switch 5 are pressed, one section of the display 6, that is, one seam.
If a rough adjustment is made that changes in millimeter increments, and the width adjustment designation switch 3 is held down, fine adjustment is made that changes in increments of 0.25 mm, which is divided into four sections. By operating the feed adjustment designation switch 7, it is possible to subsequently adjust the feed by operating the up switch 8 and down switch 9 for each selected pattern. The display device 6 displays the feed adjustment value as a bar in the same way as the width adjustment value. This feed amount is 0
The maximum feed amount corresponds to 3.5 millimeters, as indicated by the markings .about.3. When the up switch 8 and the down switch 9 are operated after releasing the feed adjustment switch 7, coarse adjustments are made in 1 mm increments as in the amplitude adjustment, and when they are operated at the same time, they are adjusted in 0.25 mm increments. Make fine adjustments. In addition, each pilot lamp 1
0 and 11 are for displaying that either switch 3 or 7 has been operated and the respective adjustment has become effective.

FIG. 2 is a control block diagram. In the figure, only the switch _S2 of the pattern selection operation device 2 is typically shown, and the output line is set to L level by operating each switch. Pattern number storage device 1
2 designates the data reading start address of the pattern data storage device 13 based on the operation of the pattern selection operation device 2, and also stores each automatic data regarding the width and feed specific to the selected pattern from the automatic data storage device 14. Output B _A and F _A. The auto data B _A and F _A are the auto set values of coefficients for adjusting and calculating each stitch data from the pattern data storage device 13 in the pattern data calculation device 15. The up/down counters 16 and 17 are the auto data B A and F _A , respectively. F _A is being received, and the rising signal following the selection operation of the pattern selection operation device 2,
Each is loaded when it is received at the load terminal L via the AND circuit 18. flip flop 19
is set by the operation of the pattern selection operation device 2, and thereafter its output Q is set when each OR circuit 20 to 27 is set to L.
When the width adjustment designation switch 3 or the feed adjustment designation switch 7 is operated, it is reset via the AND circuit 28 and each OR
Enable circuits 20-27. In the illustrated open state, the width adjustment designation switch 3 prohibits the OR circuits 29 and 30 from going to the L level, and enables the OR circuits 31 and 32. Also, while the push operation state continues, the OR circuits 31 and 32 are L.
level, and OR circuit 2
Enable 9,30. Amplitude adjustment designation switch 3
Even if the flip-flop 19 is operated once and then released, the flip-flop 19 remains in the reset state, and in this state, the flip-flop 4 resets the OR every time it is operated.
The coarse adjustment up terminal UP1 of the amplitude adjustment control counter 16 is set to L level via the circuits 31 and 20, and at this time the counter 16 counts up by four. Under the same conditions, the down switch 5 sets the rough adjustment down terminal (DAWN1) of the counter 16 to L level via the OR circuits 32 and 22, and counts down by four. While the width adjustment designation switch 3 continues to be pressed, the up switch 4 changes the OR circuit 2 for each operation.
9 and 21, the fine adjustment up terminal UP2 of the counter 16 is set to L level, and at this time, the counter 1
6 counts up by 1. Similarly, the down switch 7 sets the fine adjustment down terminal DAWN2 to L level via the OR circuits 30 and 23, and counts down by one. The counter 16 uses the auto data B as an initial value and outputs the counted up or down data _B'A from OUT1 to OUT1.
Output from OUT6. The 6-bit output data _B'A is given to the pattern data calculation device 15.
The output data _B'A corresponds to the above-mentioned variation of 0.25 mm in the value of the least significant bit, that is, the minimum unit count 1. The upper four bits of the output data _B'A are applied to the switching device 33 for display, and the least significant bit thereof corresponds to the unit count 4, that is, the above-mentioned variation of 1 millimeter. The counter 17 for feed adjustment control has the same configuration as the counter 16, and the feed adjustment designation switch 7 has the same configuration as the counter 16.
It functions in the same manner as the circuits 34 to 36, etc., and the 6-bit output data _F'A of the counter 17 is given to the pattern data calculation device 15, and its upper 4 bits are given to the switching device 33. flipflop 38
is set by the amplitude adjustment designation switch 3,
Alternatively, it is reset by the feed adjustment designation switch 5, and the switching device 33 switches the data of either the counters 16 or 17 and outputs the data depending on the output Q thereof. The AND circuit 39 validates the data on the counter 16 or 17 when the flip-flop 19 is reset, that is, when the width adjustment designation switch 3 or the feed adjustment designation switch 7 is operated, and when these are not operated, the data on the display device 6 is displayed. It is intended to prohibit. The decoder 40 decodes the data of the counters 16 and 17 for display. Pattern forming device 41
receives a stitch control signal for each stitch from the pattern data calculation device 15 to form a pattern. The pilot lamp 10 receives signals from the flip-flops 19 and 38 via an AND circuit 42, and lights up when each of these flip-flops is at the L and H level, respectively. It receives flip-flop signals and lights up when both of them are at L level.

The operation of the above configuration will be explained below.
When the switch _S2 of the pattern selection operation device 2 is operated, the pattern number storage device 12 specifies a zigzag pattern as shown in FIG _. F _A is output and counters 16 and 17 load it. Flip-flop 19 is set, display device 6, pilot lamp 10,1
1 are not lit together. The auto data B _A and F _A specify standard needle width and cloth feed, and the pattern forming device 41 is capable of forming a zigzag pattern using standard stitch coordinates. If the amplitude adjustment designation switch 3 is subsequently operated, the flip-flop 19 is reset and the flip-flop 38 is set. The pilot lamp 10 lights up and the switching device 33 makes the data _B'A of the counter 16 valid. The data B' _A that the AND circuit 39 gives to the decoder 40 is the auto data B _A at this time, and the display device 6 simultaneously lights up five sections of markers 0 to 4 in FIG. A bar indicates that the width is 4 mm. If you continue to operate the up switch 4 with the amplitude adjustment designation switch 3 released, the counter 16 will count up by 4 as the coarse adjustment up terminal UP1 goes to the L level with each operation, and the decoder 40 will count up the upper 4 bits. display device 6
Extends the bar display one section at a time to the right. When the down switch 5 is operated in the same manner, the rough adjustment down terminal DAWN1 goes to the L level each time the down switch 5 is operated, and the bar display on the display device 6 is shortened one section at a time. Next, when the up switch 4 is operated while the swing width adjustment designation switch 3 is held down, the counter 16 is set to the up terminal for fine adjustment each time the up switch 4 is operated.
UP2 becomes L level and counts up by 1. The increase in zigzag width in this one operation is 0.25 mm. Since the upper four bits of the counter 16 do not change during the first three operations, the zigzag width is finely adjusted during this period, but the display device 6 does not change. Then, in the fourth operation, the bar display is extended by one section. When the down switch 5 is operated in the same manner, the fine adjustment down terminal DOWN2 goes to the L level with each operation, and the zigzag width is minutely decreased and adjusted.
The bar display is shortened by one section for each operation.

(Effects) As described above, according to the present invention, firstly, after once operating the adjustment specifying operation section, coarse adjustment is performed by operating the stitch adjustment operation section, and stitch adjustment is performed while operating the adjustment specifying operation section. There are two types of adjustment modes: fine adjustment by operating the part, and there is no restriction on the order of operation, and coarse adjustment or fine adjustment can be performed freely. The sewing machine can be operated freely, and thirdly, the increase and decrease adjustment operations during fine adjustment can be freely performed, and the sewing machine's needle swing width and fabric feed amount can be adjusted quickly and with high precision through simple operations. It will be done.

[Brief explanation of the drawing]

FIG. 1 is a front panel external view of a sewing machine showing an embodiment of the present invention, and FIG. 2 is a control block diagram. In the figure, reference numerals 3 and 7 are adjustment designating operation sections, up switches 4 and 8, and down switches 5 and 9 are stitch adjustment operation sections.

Claims (1)

[Claims] 1. In a sewing machine equipped with an electronic storage device that stores stitch control signals that enable formation of a plurality of stitch patterns, at least each stitch coordinate with respect to the needle amplitude of a selected stitch pattern can be adjusted. an adjustment designation operation section that is operated by a key to specify the stitch pattern; and a stitch adjustment operation section that becomes effective when the adjustment specification operation section is operated to increase or decrease the coordinates of each stitch of the selected stitch pattern; The adjustment operation section is operated in combination with the adjustment specification operation section, and when the stitch adjustment operation section is operated after the adjustment specification operation section is operated once, the stitch coordinates are coarsely adjusted. When the seam adjustment operation section is operated, the seam coordinates are finely adjusted. A seam adjustment device for a sewing machine, characterized in that increasing and decreasing adjustment operations can be freely performed during fine adjustment.