JPS5926320B2 - Stitch pattern selection device for sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stitch pattern selection device for a sewing machine that is capable of selectively forming a large number of different types of stitch patterns. A sewing needle, a feeding device for applying a feeding motion to the workpiece cloth in synchronization with the vertical reciprocating movement of the sewing needle, and controlling the horizontal swinging movement of the sewing needle and the feeding motion of the feeding device. a fixed storage device storing a large number of information groups each corresponding to each stitch pattern and one of which can be selectively activated in order to form various stitch patterns; and the selective activation described above. a readout device for sequentially reading out each piece of information in the information group from the fixed storage device using timing pulses generated in synchronization with the up and down reciprocating movement of the sewing needle; The present invention relates to a stitch pattern selection device for a sewing machine equipped with an operating device for operating a sewing needle and a feeding device, respectively.

Conventionally, in this type of stitch pattern selection device, one end of a plurality of pattern selection switches respectively corresponding to the plurality of stitch patterns is connected to a code signal generator for generating a code signal corresponding to each stitch pattern. The code signal generators are individually connected to a number of input terminals, and when any one of the pattern selection switches is operated to form a desired stitch pattern, the code signal generator selects the desired stitch pattern. A specific code signal corresponding to the desired stitch pattern is generated, and this specific code signal is adapted to enable a group of information corresponding to the desired stitch pattern in the aforementioned fixed storage device.

However, as mentioned above, one end of a large number of pattern selection switches and a large number of input terminals of a pattern selection information processing device including a code signal generator are each connected separately, so there are many connection lines between the two. This results in failures due to poor connections, etc. Furthermore, when the information processing device is integrated with the pattern forming control device including the fixed storage device, etc., the number of input terminals of the integrated circuit increases, and the integrated circuit This is the reason why it cannot be done cheaply.

The present invention has been made in view of the above circumstances, and its object is to provide a stitch pattern selection device for a sewing machine that can reduce the number of connection lines between the pattern selection switch and the information processing device as much as possible. It is in.

Hereinafter, the present invention will be explained by way of an example with reference to illustrations.

Reference numeral 1 denotes a machine frame for a sewing machine that can selectively form a large number of stitch patterns, for example, 16 types, and a side wall on the operator's side of the upper cover 3 provided at the upper opening of the sewing machine arm 2 has a frame on the left and right sides. A long display board 4 is arranged, on which a large number, for example 16, figures 5 each representing various stitch patterns are arranged.

The display parts 6 on which numbers 515 to 515 are drawn are arranged adjacent to each other in the longitudinal direction. Reference numerals 70 to 715 indicate 16 pattern selection push buttons constituting an operation switch means, which are arranged facing the display section 6 on which each figure of the display board 4 is drawn on the upper lid 3; 8 normally open switch elements, respectively.

to 815 are provided. Reference numeral 9 denotes a sewing needle that moves up and down in reciprocating motion on the main shaft of the sewing machine (not shown), and is oscillated in the horizontal direction by an amplitude control actuator 10 shown in FIG. 2, and its oscillation is also controlled. .

Reference numeral 11 denotes a feed device, such as a feed dog, which imparts a feed motion to the work cloth in synchronization with the up and down reciprocating movement of the sewing needle 9, and the feed direction and feed increment of the work cloth are controlled by a feed control actuator 12 shown in FIG. It's becoming controlled.

In FIG. 2, reference numeral 13 is an information processing device for selecting a stitch pattern, which will be described in detail below. Reference numeral 14 is a selection counter consisting of a hexadecimal counter constituting the code signal generating means of the present invention; By receiving counting pulses P1 generated at a constant period from the generator 15, the counting operation is performed and different code signals P2 corresponding to each stitch pattern are sequentially generated. This code signal P2 is supplied to the first data input terminals Al, A2, A4, A8 of the multiplexer 16, which corresponds to the gate means of the present invention, and to the input terminal of the multiplexer circuit 17. The code signal P2 stored in the latch circuit 17 as described later is supplied to the second data input terminals B1, B2, B4, and B8 of the multiplexer 16. Reference numeral 18 denotes a gate pulse generator constituting gate signal generating means for generating a gate signal, that is, a gate pulse signal P3, and supplying it to the selection terminal ST of the multiplexer 16.

The gate pulse signal P3 has a time width of a low level part and a high level part set at a ratio of approximately 1:30, and the low level part has a time width corresponding to the second supply period of the present invention. The high level portion is also used as a second gate signal P32 having a time width corresponding to the first supply period of the present invention. When the multiplexer 16 receives the first gate signal P3l, the code signal P2 inputted to the first data input terminals Al, A2, A4, A8 is outputted to the digital output terminals Cl, C2, C4,
A specific code signal P2, which is the output of the latch circuit 17, which was input to the second data input terminals Bl, B2, B4, and B8 when the second gate signal P32 was received, is output to C8. It is configured to output to output terminals Cl, C2, C4, and C8. 19 is the code signal P2
The actuating means is, for example, a decoder, for operating the specifying means in response to the code signal P2 so that the designating means, which will be described later, can specify a figure displaying a stitch pattern corresponding to the code signal P2.

This decoder 19 receives the code signal P2 from the data output terminals Cl, C2, C4, and C8 of the multiplexer 16, decodes it, and generates a conversion signal corresponding to the code signal P2, and outputs the output terminals DO to Dl5. The conversion signal is generated so that only one of the output terminals has a low potential and all the other output terminals have a high potential, and the output terminal is configured to output the low potential signal in response to the code signal P2. They are gradually being changed and moved. 200 to 2
Reference numeral 015 denotes an indicator lamp, such as a light emitting diode, which corresponds to the specifying means of the present invention, and each of these cathodes is connected to the output terminals DO to Dl5 of the decoder 19 in a large scale, and each anode is connected to the output terminal via a resistor 21. and is connected to the positive potential terminal 22.

Each of the light emitting diodes 200 to 2015 is formed close to each display portion 6 of the display board 4 in order to optically designate each of the 16 shapes 50 to 515 corresponding to each stitch pattern. It is arranged inside the upper cover 3 so as to face the specified windows 230 to 2315. On the other hand, the pattern selection push button 7. 715 to 715, respectively. One end of each of the terminals 815 to 815 is connected to the output terminals DO to Dl5, respectively, and the other end thereof is connected to one common line 24. Further, this common line 24 is connected to a trigger input terminal 27 of a monostable multivibrator 26 via an inverter 25, and an output pulse P outputted from an output terminal 28 of this monostable multivibrator 26.
4 is supplied to the clock input terminal CK of the latch circuit 17. Now, in the pattern formation control device 29, 30 is a first fixed storage device storing a large number of oscillation amplitude information groups corresponding to each stitch pattern, in order to control the lateral oscillation amplitude of the sewing needle 9; 31 is a second fixed storage device that stores a large number of feed information groups corresponding to each stitch pattern in order to control the feed increment and feed direction of the work cloth; By receiving the code signal P2 via the selection line 17a, a pair of swing amplitude information group and send information group corresponding to the specific code signal P2 is selected from among the swing amplitude information group and send information group. It is configured to be selected and enabled.

Reference numeral 32 denotes a timing pulse generator that generates timing pulses in synchronization with the up and down reciprocating movement of the sewing needle 9, and a timing pulse distributor 83 generates timing pulses BCP for amplitude control and timing pulses for feed control that have mutually different phases. It is converted into a counting pulse FCP and supplied to each counting terminal of a first address counter 35 and a second address counter 36 corresponding to the reading device 34, respectively.

Each address counter 35, 36 set input terminal RT
is the output terminal 28 of the monostable multi-handed vibrator 26.
is connected. The count output signals of the first address counter 35 and the second address counter 36 are supplied to the first fixed storage device 30 and the second fixed storage device 31, so that the count output signals are enabled by the code signal P2. Each piece of information (corresponding to one stitch) in a pair of oscillation amplitude information group and feed information group corresponding to one type of stitch pattern is periodically counted by each address counter 35, 36. It is now being read out. First, the swing amplitude information read out in the binary code state from the first fixed storage device 30 as described above is sent to the D-A converter 3.
7 into an analog signal, which is supplied to the amplitude control actuator 10 via an amplitude control driver 38. The amplitude control attacher 10 controls the sewing needle 9 with an amplitude corresponding to the swing amplitude information read out.
In order to swing the sewing needle 9 in the lateral direction, the lateral oscillating movement of the sewing needle 9 regarding the formation of the two stitches is controlled. On the other hand, the feed information read out in binary code form from the second fixed storage device 31 is converted into an analog signal by the D-A converter 39, and then sent to the feed control driver 4.
0 to the feed control head unit 12. The feed control attacher 12 controls the feed movement of the feed dog 11 regarding the formation of one seam in order to feed the work cloth with a feed increment corresponding to the read feed information. Then, one stitch pattern is formed by reading out all the information in the corresponding pair of swing amplitude information group and feed information group through one round counting operation of both address counters 35 and 36. By repeating such a cycle, the same type of stitch pattern is continuously formed. In the pattern formation control device 29 as described above, the D-A converters 37, 39, the amplitude control driver 38, the feed control driver 40, the amplitude control actuator 10, and the feed control actuator 12 correspond to the operating device 41 of the present invention. do. Next, a stitch pattern selection operation will be described when various stitch patterns are formed by controlling the relative positions of the sewing needle 9 and the work cloth as described above by the pattern formation control device 29.

That is, in a state where power is applied to all circuits and which pattern selection push button 7 is pressed. All normally open switch elements 8 are not pressed. 815 are in the open state, different code signals P2 corresponding to each stitch pattern are sequentially generated from the selection counter 14 at a constant cycle, and these are sent to the input terminals of the latch circuit 17 and the multiplexer 16. One data input terminal Al, A2, A4
, A8, and among them, the first gate signal P3l of the gate pulse signal P3 is input to the first data input terminals Al, A2, A4, and A8.
While being supplied to the selection input terminal ST of the multiplexer 16, the data are sequentially outputted to the data output terminals Cl, C2, C4, and C8 and supplied to the decoder 19. Therefore, each time a mutually different code signal P2 is supplied to each of the output terminals DO to Dl5 of the Deco-Ita 19, the low potential signal in the corresponding conversion signal is changed from the lowest output terminal DO to the highest output terminal D.
It is output while being sequentially changed and moved in the direction toward l5.
Along with this, the light emitting diodes 200 to 3015 are
The direction from the lowest light emitting diode 200 to the highest light emitting diode 2015 (from left to right in FIG. 230 to 2315 are used to sequentially designate the corresponding figures. In this sequential designation, the lighting time of each of the light emitting diodes 200 to 20,5 is determined by the first gate signal P3.
During the generation time, at least one of the 16 types of code signals P2 from the selection counter 14 is supplied to the decoder 19, and the light emitting diodes 200 to 2015 are turned on, respectively. . Now, when the corresponding pattern selection push button 714 is pressed to form a desired stitch pattern, the corresponding normally open switch elements 8, 4 are closed. This results in
Output terminal DO of decoder 19 in response to code signal P2
Output terminal D among the conversion signals sequentially generated from Dl5 to Dl5.
When a conversion signal in which only l4 has a low potential is generated in response to the specific code signal P2 corresponding to the desired stitch pattern, the light emitting diodes 20 and 4 light up, and at the same time the inverter 25 is in the closed state. The low potential of the conversion signal is provided via the open switch element 814. For this reason, the monostable multivibrator 26 is triggered by the rising edge of the output of the inverter 25 and generates an output pulse P4, which is applied to the reset input terminals of the first and second address counters 35 and 36 to record the counted contents. At the same time, the latch circuit 1
It is also supplied to the clock input terminal CK of No.7. Then, the rough circuit 17 stores and holds the specific code signal P2 corresponding to the conversion signal in which only the output terminal Dl4 becomes a low potential, and sends the specific code signal P2 to the second data input terminal of the multiplexer 16. At the same time, it is supplied to the first and second fixed storage devices 30 and 31 via the selection line 17a. The specific code signal P2 inputted to the second data input terminals Bl, B2, B4, B8 is output as a digital signal by a second gate signal P32 which is generated subsequent to the first gate signal P3l. The signals are output to terminals Cl, C2, C4, and C8, and further supplied to the decoder 19 from there. That particular code signal P
2 is decoded again and its conversion signal is generated again so that only the output terminal Dl4 is at a low potential. in this case,
The conversion signal corresponding to the specific code signal P2 is output to the output terminal f)0 by a second gate signal P32 whose generation time is sufficiently longer than the generation time of the first gate signal P3l.
Since the output is from to Dl5, the light emitting diode 2014
is lit continuously during the period in which the second gate signal P32 is generated, and only the shape 514 that displays the desired stitch pattern in a state close to continuous lighting is optically designated, and the designated stitch pattern is optically designated. The image 514 allows the operator to recognize that the desired stitch pattern has been selected. Then, a specific code signal P corresponding to the stitch pattern selected in this way is
2 is connected from the latch circuit 17 to the selection line 17a as described above.
are supplied to the first and second fixed storage devices 30 and 31 via the code signal P2, thereby validating a specific oscillation amplitude information group and sending information group corresponding to the specific code signal P2. A seam pattern is formed.
Next, another pattern selection push button 7 is pressed to form another stitch pattern different from the desired stitch pattern. 713, 715 is pressed, the corresponding normally open switch element 8. 813, 8, 5 are closed, and the low potential signal in the conversion signal from the decoder 19 is supplied to the inverter 25 through the closed normally open switch element, thereby Monostable multivibrator 26
An output pulse P4 is generated from the latch circuit 17, and the output pulse P4 is supplied to the clock input terminal CK of the latch circuit 17. As a result, the data is stored and held in the latch circuit 17. As a result, the specific code signal P2 stored in the latch circuit 17 is rewritten to another specific code signal P2 corresponding to the other stitch pattern described above, and this other specific code signal P2 is stored in the latch circuit 17. will be retained. Since the generation time of the first gate signal P3l from the gate pulse generator 18 is sufficiently shorter than that of the second gate signal P32, the conversion signal of the specific code signal P2 stored in the latch circuit 17 is Therefore, light emitting diodes 200 to 2
A specific one of 015 lights up substantially continuously, and the operator recognizes only the corresponding figure as being continuously designated optically. In the above embodiment, the latch circuit 1
7 is a configuration in which the specific code signal P2 itself is stored and held, but the present invention is not limited to this, and a configuration in which a converted signal after being decoded by the decoder 19 is stored and held may be adopted.

As is clear from the embodiments described above, the invention comprises a number of operating switch means 8.

A plurality of specifying means 200 to 2015 and a plurality of operating switch means 8 are commonly connected to one end of the plurality of designating means 200 to 2015 and a plurality of operating switch means 8 to a plurality of output ends of an actuating means 19 which operates according to a code signal corresponding to each stitch pattern. By connecting the other ends of ~815 respectively, the actuating means 1 corresponding to the content of the code signal.
A specific signal generated from one output terminal of 9 is used to operate one specifying means 200 to 2015 corresponding to a desired pattern, and a large number of operation switch means 8
. - 815, it is also used to monitor the operating state of the switch means corresponding to the desired pattern, and a monitoring signal representing the operating state is transmitted to the multiple operating switch means 8. The information processing apparatus 13 is characterized in that the information is inputted to the information processing apparatus through the common connection section 815, and as a result, the information processing apparatus 13 including the code generation means 14 and the operation means 19, and the designating means 200-2015 and a number of operating switch means 8; The number of connection lines with ~815 is the same as the number of output ends of the actuation means 19 and the large number of operation switch means 8. 815, the number of connections is reduced to the sum of the input end, which is the common connection part of the 815, and the connection wiring work becomes easier, and the causes of failures such as poor connections are reduced, improving the reliability of the information processing device and ultimately the sewing machine. Operation reliability can be improved. Furthermore, when the information processing device is integrated, the number of terminals of the integrated circuit is reduced, and the integrated circuit can be provided at a low cost, which is effective in practical implementation.

[Brief explanation of drawings]

FIG. 1 is a front view of a sewing machine according to an embodiment of the present invention, and FIG. 2 is a plotter diagram showing the electrical configuration of the embodiment. In the figure, 1 is the machine frame, 4 is the display board, 5 is the figure, 70 to 715
is a pattern selection push button (operation switch means), 80 to 815
1 is a normally open switch hand element (operation switch means), 9 is a sewing needle, 10 is an amplitude control actuator, 11 is a feed dog (feed device), 12 is a feed control actuator, 14 is a selection counter (code signal generation means) ), 16 is a multi-handed pretas (gate means), 17 is a latch circuit, 18 is a gate pulse generator (gate signal generating means), and 19 is a decoder (
200 to 2015 are light emitting diodes (specifying means), 29 is a pattern formation control device, 30 is a first fixed storage device, 31 is a second fixed storage device, 34 is a reading device, 41 is an operating device, P3l and P32 are first and second gate signals, respectively.

Claims (1)

[Claims] 1. In order to form each of a number of predetermined stitch patterns by controlling the relative position of the sewing needle 9 that is capable of reciprocating up and down and the work cloth, fixed storage devices 30, 31 storing a large number of information groups, one of which can be selectively activated; a readout device 34 for sequentially reading out the fixed storage devices 30, 31 by timing pulses generated in time, and an operation device 41 for changing the relative position according to the read information. In the sewing machine equipped with the above-mentioned sewing machine, there is a display board 4 arranged on the machine frame 1 of the sewing machine, in which a number of shapes each displaying the number of stitch patterns are arranged adjacent to each other, each corresponding to the shape of the display board 4. a large number of operation switch means 8_0 to 8_1_5 arranged in a manner that one end is commonly connected; and a code signal generator that sequentially generates each of a large number of different code signals corresponding to the plurality of stitch patterns at a constant cycle. Means 14
and an operating means 19 having a plurality of output terminals respectively connected to the other ends of the plurality of operation switch means 8_0 to 8_1_5, and generating a specific signal from one output terminal corresponding to the content of the code signal; a plurality of specifying means 20_0 to 20_1_5 connected to the plurality of output terminals, respectively, and operating in response to the specific signal in order to specify only a figure displaying a desired stitch pattern among the plurality of stitch patterns; ,
Latch means 17 capable of storing and holding the code signal from the code signal generating means 14; means 26 for causing said latching means 17 to hold a code signal in response to a particular signal, the particular code signal held by said latching means 17 and a number of different code signals from said code signal generating means; gate means 16 for selectively supplying either one of the above to the actuation means 19, and only the state designated by the designation means 20_0 to 20_1_5 of the shape representing the stitch pattern corresponding to the specific code signal is operated. a first supply period P32 for supplying the particular code signal to the actuating means 19 in order to ensure that it is recognized by the person; gate signal generating means 18 for generating and supplying a gate signal P3 to the gate means 16, respectively setting a second supply period P31 sufficient to sequentially designate the desired stitch pattern at least once; means 17a for supplying a code signal held in the latch means 17 to the fixed storage devices 35, 36 for activating a corresponding one of the plurality of pieces of information.