JP2508993B2 - sewing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine which can cope with various functional improvements by replacing an operation panel.

[0002]

2. Description of the Related Art Conventionally, in addition to basic functions such as automatic thread trimming, wiper, touch back, etc., when functions such as front / rear stop stitching, continuous stop stitching, fixed length stitching, etc. are added, models are classified according to the additional functions. Of different sewing machines. However, if different models are manufactured each time a function is added, inventory management becomes complicated, the number of parts increases, and productivity decreases, so that it is disclosed in, for example, Japanese Patent Publication No. 60-39392. As described above, various sewing control can be performed by preparing electric control packages for sewing machines with different functions, selecting each electric control package according to the function of the sewing machine, and attaching it to the sewing machine frame. I am trying to correspond to. The electronic control package is composed of a circuit board on which an electronic control circuit for controlling the sewing machine is formed and a panel on which operation parts are attached, and an electronic circuit board and a panel are provided for each different function of the sewing machine. The method of mounting all at once was adopted.

[0003]

However, when the means for collectively mounting the electronic control circuit and the panel each time the function of the sewing machine is different as in the above-mentioned conventional method, the electronic circuit board and the panel are mounted for each function of the sewing machine. It is very difficult to achieve the purpose of standardizing the sewing machine and improving the productivity because it requires time and effort to manage the inventory of electronic circuit boards and panels, and the increase in the number of electronic components. There was a problem that was. Therefore, in the present invention, for example, a microcomputer is used as an electronic control circuit for controlling the sewing machine, and various function control programs of the sewing machine are stored in advance in the storage means of the microcomputer while the function of the sewing machine is improved. It is a technical object to solve the above-mentioned conventional problems by configuring so that only the operation panel is replaced each time the operation is performed so that the function of the sewing machine can be easily improved.

[0004]

The technical means for solving the above-mentioned problems is to provide a head part that is easily visible in a normal driving posture.
The operation panel is equipped with multiple types of operation panels that support various functions.
It is mounted so that it can be replaced, and
It is electrically connected to the attached operation panel and
Control that activates the various functions based on the operation of the channel
In the sewing machine equipped with the
Identification signal output times that output different identification signals for each work panel
While providing a path, the control unit is
Determining whether or not the operation panel is attached, the
If you determine that the operation panel is installed,
The same operation for the identification signal output circuit of the operation panel
Queries the panel type and outputs the identification signal
Operation panel size to determine the type of the operation panel by
Another means and the operation discriminated by the operation panel discrimination means.
Special function system that activates the function corresponding to the type of work panel
The head position by the control means and the operation panel discrimination means.
It was determined that the operation panel was not attached to
In some cases, the basic function control means for activating the basic function
It is to provide.

[0005]

According to the sewing machine having the above structure, the sewing machine is provided in the control section.
Operation panel discriminating means is installed on the sewing machine head position.
When the panel is recognized as installed, its operation panel
The identification signal output circuit of the
By outputting the identification signal together, the operation panel
If the special function control means determines the operation type,
While operating the function corresponding to the type of panel, the head part
When the operation panel is not attached to the
The control means activates the basic functions.

[0006]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a perspective external view of the sewing machine 1. As shown in the figure, the sewing machine main body 2 is placed on a table 3, and the head 4 of the sewing machine main body 2 corresponds to the function improvement of the sewing machine. A plurality of types of operation panels 5 prefabricated in advance are replaceably attached. Further, below the sewing machine main body 2, a driving motor 6 for driving the sewing machine main body 2 and a control box 7 incorporating an electronic control circuit for performing various controls of the sewing machine 1 are attached. ing. A foot pedal 8 is provided under the foot of the table 3, and the foot pedal 8 is connected to various switches and a speed command device provided in the control box 7. When the foot pedal 8 is stepped forward, the driving speed of the sewing needle changes in accordance with the stepped amount, and when the pedal is returned backward, thread trimming or the like is automatically performed. It has become.

FIG. 2 shows an operation panel mounting means on the head 4 of the sewing machine main body 2. The operation panel mounting portion 9 of the head portion 4 is formed in a recessed shape that is substantially equal to the thickness dimension of the operation panel 5, and a small-diameter hole 1 is formed in front of the recessed portion.
0 and 10 are open at two places, one on the left and one on the right. In addition, holes 10 and 10 of the same small diameter are formed from the upper surface of the head 4.
Small-diameter screw holes 11, 11 are formed in a direction perpendicular to the central axis of the. FIG. 3 is a sectional view showing the positional relationship between the hole 10 and the screw hole 11. FIG. 4 shows the holes 10 and 1
It is a perspective external view of the guide pin 12 inserted in 0. As shown in the figure, the guide pin 12 has a split groove 13 formed in the axial direction. FIG. 5 is a perspective external view of the screw 14 screwed into the holes 11, 11. As shown in the figure, the screw 14 is formed so that it can be screwed in from above with a screwdriver or the like.

FIG. 6 is a sectional view showing a state in which the guide pin 12 and the screw 14 are set in the holes 10 and 10 and the holes 11 and 11, respectively. As shown in the figure, the lower end surface of the screw 14 screwed from the upper surface of the head 9 contacts the guide pin 12 and acts to compress the split groove 13 of the guide pin 12. FIG. 7 shows insertion pieces 15 and 15 formed on the back surface of the operation panel 5, and the insertion pieces 15 and 15 are inserted into the split groove 13. Then, the screw 14 acts so as to compress the space of the split groove 13 of the guide pin 12, and the insertion piece 15,
The operation panel 5 is fixed to the head 4 by sandwiching 15 between them.

FIGS. 8, 9 and 10 are operation panels 5A and 5B, respectively, which are manufactured to correspond to the functional improvement of the sewing machine.
And 5C are shown. The panel 5D shown in FIG. 11 is a panel for the operation panel mounting portion cover,
When the operation panels 5A, 5B and 5C are not attached to the head 4, the holes 10 and 10 are covered while the head 4 of the sewing machine 1 is decorated. Therefore, an insertion piece similar to the operation panel is also formed on the back surface of the panel 5D. Since each of the above operation panels is electrically connected to the control box 7, each operation panel has a signal cable.
The cable 5S is connected, and a cable relay connector (not shown) is provided at the tip of the signal cable 5S. On the other hand, a signal cable (not shown) is also connected to the control box 7, and a cable relay connector is also provided at the tip of the signal cable.
It is electrically connected by a bull relay connector.

In the sewing machine 1 having the above-described structure, when the cover panel 5D is attached to the head 4, that is, when neither of the operation panels is attached, the sewing machine 1 is fixed at a fixed position described later. Allows control modes based on basic specifications such as stop, thread trimming, thread wiping, reverse rotation, presser foot lifting, slow start, correction sewing, and automatic sewing. On the other hand, in addition to the above-mentioned basic specifications, for example, when setting front / rear stop stitching or constant-dimension stitching, the operation panel 5A shown in FIG. 8 is used. When setting the number of stitches for front and rear backtacking, set the number of front and rear backtack stitches while watching the displayed values on the indicators 61 and 62 with the stitch number setting devices A and B. By operating -63 and rear backtack key 64, it is possible to recognize whether or not the number of stitches for front and rear backtack is set. Further, when setting the number of stitches for constant-dimension sewing, the number of stitches setter E (also serving as the number of stitches setters A and B) is used to display the indicator 6
After setting the number of stitches for constant-dimension sewing while looking at the displayed values of 1, 62, the presence or absence of setting of the number of stitches for constant-dimension sewing is recognized by operating the constant-dimension stitching key 76.

When the number of stitches for front and rear backtack stitches is set by attaching the operation panel 5A, the number of front and rear backtack stitches is limited to the two types set by the stitch number setting devices A and B. When it is necessary to change the number of front backtack stitches and the number of backtack stitches, or when setting the number of stitches for continuous backtack or label stitching, it is impossible to set the number of stitches on the operation panel 5A. In that case, the operation panel 5B shown in FIG. 9 is used. When using the operation panel 5B to set the number of stitches for front and back tack stitches with different stitch numbers, set the number of stitches in the first stroke of front tack stitch with the stitch number setting device A while looking at the display device 65, and display At the same time, the number of stitches in the second step of front backtacking is set by the number of stitches setting device B while looking at the display device 66, and is displayed. Next, the stitch number setting device C is used to set and display the number of stitches in the first stroke of the backtack stitch while observing the display device 67, and the stitch number setting device D is used to set the number of stitches in the second stroke of the backtack stitch. After setting and displaying, the front backtack key 69 and the rear backtack key 70 are operated to recognize whether or not the number of stitches for the front backtack and the rear backtack is set. Further, when setting the number of stitches for continuous backtacking, first, the number of stitches for the first stroke is set and displayed while looking at the indicator 65 with the number of stitches setter A, and the number of stitches for the second stitch is set by the number of stitches setter B with the second number. The number of stitches in the stroke is set and displayed while looking at the display device 66, and the number of stitches in the third stroke is set and displayed while looking at the display device 67 by the stitch number setting device C. After setting and displaying the number of stitches in the fourth stroke while looking at the display 67, when the continuous backtack key 77 is operated, it is recognized whether or not the number of continuous backtack stitches is set.

When the label sewing is set, the number of stitches in the first stroke and the third stroke is used as the stitch number setting device E (the stitch number setting devices C and D) while observing the indicators 67 and 68. There is.)
The number of stitches for the second stroke and the fourth stroke is set by the stitch number setting device F (also serving as the stitch number setting devices A and B) while observing the indicators 65 and 66. Then, when the label sewing key 78 is operated after the display, whether or not the number of stitches for the label sewing is set is recognized. The operation panel 5C shown in FIG. 10 enables not only the sewing settings when using the operation panels 5A and 5B but also the program sewing settings for increasing the sewing efficiency. Number of stitches setting device A, B, C, D on the operation panel 5C, display device 65E, 66
E, 67E and 68E, and front lock key 69E,
The rear backtack key 70E and the continuous backtack key 77E are the stitch number setting devices A, B, and B of the operation panel 5B shown in FIG.
C, D, indicators 65, 66, 67, 68, front backtack key 69, rear backtack key 70, continuous backtack key 77 in order to set the same number of stitches as the backtack stitch belongs to.

The pattern setting devices 75A and 75B and the display device 75 for displaying the pattern number are used for normal sewing (pattern 1), fixed-dimension sewing (pattern 2), and label sewing (pattern). 3) and overlapped stitching (pattern 4) are set. Pattern setting device 75A,
75B and the setting pattern 1 by the display 75 are the normal sewing setting mode and the setting pattern 2 for performing normal sewing.
Is a constant-dimension sewing setting mode with the same setting as the operation panel 5A, setting pattern 3 is a label sewing setting mode with the same setting as the operation panel 5B, and setting pattern 4 is a lap stitching mode. The above setting pattern 2 and setting pattern
The number of stitches is set in the pattern 3 and the setting pattern 4 by operating the number of stitches setter 91, 92, 93, 94 to display the set value on the display 95, 96. On the other hand, the pattern
The pattern number is set to 5 by operating the pattern setting devices 75A and 75B.
When set to ~ 9, the number of stitches for program sewing can be set. For example, when the pattern number is set to 5 and the number of stitches for pocket sewing is programmed, for example, the display value of the step number display 71 is set to 1 by the step setters 72 and 73, and then the number of stitches setter is set. 91, 92, 93,
94 is operated to change the number of stitches in step 1 to the stitch number display 95,
While watching 96, set in the range of 0 to 99. Next, after setting the display value of the step number indicator 71 to 2, the number of stitches is set as in step 1. Similarly, the number of stitches in each step from step 3 to the required number of steps required for pocket sewing is set. Next, for example, when setting the number of stitches for sewing with a program, operate the pattern setting devices 75A and 75B to perform pattern
After setting the number of stitches to 6, set the same number of stitches as the number of stitches for pocket sewing.

FIG. 12 shows an electric control block. As shown in the figure, the operation panels 5A, 5B and 5
C is electrically connected to the input / output interface 80, and various switches, an indicator and an operation panel 5 of the operation panel electrically connected to the control box 7.
An identification signal generation circuit 5R for outputting a unique identification signal of each of A, 5B and 5C is input to the microprocessor (CPU) 81 via the connector 116 and the input / output interface 80 shown above. The microprocessor 81 is connected to a memory 82 such as a RAM and a ROM, and the microprocessor 81 controls the sewing machine 1 based on a control program stored in the memory 82. The memory 82 stores a control program corresponding to the operation panels 5A, 5B and 5C, and is attached to the operation panel attachment portion 9 based on the identification signals output from the operation panels 5A, 5B and 5C. An operation panel identification program for identifying the type of the obtained operation panel is stored. Further, when none of the operation panels is connected, a basic control program for controlling the sewing machine 1 with the following basic specifications is stored. The above basic specifications include the fixed-position stop mode for setting the stop positions above and below the needle that moves vertically.
And a thread cutting mode for cutting the upper thread and the lower thread when the foot pedal 8 is stepped back in a state in which the rotation of the motor 6 has dropped below a predetermined speed, and the thread cutting mode described above. A thread wiper mode for sweeping the thread so that the thread cut by does not come out to the cloth surface, and a reverse mode for converting the cloth feed direction to the opposite direction.
The presser foot lifting mode for raising the cloth presser, the slow start mode for slowing down the rotation of the motor 6 at the start of rotation, and the hand movement by the foot pedal 8 to the end of the target position. The sewing machine is stopped by pressing, and the sewing mode for correcting the stitches from the stop position to the end target position is performed in stitch units, and the automatic stitching mode for automatically moving the stitches without the foot pedal 8 being operated. -Including such as.

Therefore, the operation switches for controlling the sewing machine 1 having the above-mentioned basic specifications, such as the slow start switch 83, the actuator changeover switch 84, the needle stop position switch 85, and the foot pedal 8 are stepped forward. Start switch 8 to start driving motor 6
7, the thread trimming switch 88 for performing a thread trimming operation when the foot pedal 8 is depressed on the heel, and the rotation speed of the motor 6 in accordance with the depression amount of the foot pedal 8.
A speed signal generator 89 and the like are provided in common, and the circuit is configured so that the output signals of these switches are input to the microprocessor 81 via the input / output interface 80. ing. A motor drive circuit 110 for supplying drive power to the motor 6 and a solenoid drive circuit 111 are connected to the input / output interface 80. The solenoid drive circuit 111 includes a thread cutting solenoid 112 driven in the thread cutting mode, a wiper solenoid 113 driven in the thread wiping mode, and the presser foot lifting mode.
Presser foot lifting solenoid 114 driven in the reverse mode and reverse rotation solenoid 115 driven in the reverse mode.
And are connected. In the electric control block diagram shown in FIG. 12, the range surrounded by the chain double-dashed line is the common electric control block 86 of the sewing machine 1 from the above electric control configuration. FIG. 13 shows a peripheral circuit including the identification signal generating circuit 5R of the operation panels 5A, 5B and 5C.
In order to generate an identification signal peculiar to each operation panel, a decoding signal is sequentially output from the microprocessor 81 to the selectively attached operation panel at a predetermined timing. This decoding signal is input to the decoder 101 provided in the operation panel, and the output side terminals (0), (1), (2), (3), of the decoder 101 are input.
(4) ... Decode signals are sequentially output. The decoding signal from the microprocessor 81 is the decoder 101.
14 is input to the output terminal (0) of the decoder 101 and a logical "1" signal is output, for example, when the attached operation panel is 5A or the operation panel 5A is shown in FIG. As shown, since the output side terminal (0) of the decoder 101 and the line KEY1 are connected, a logic "1" signal is sent from the line KEY1 to the microprocessor 8
Returned to 1. Therefore, the microprocessor 81
It can be judged that the attached operation panel is 5A. Similarly, when the attached operation panel is 5B, and in the case of the operation panel 5B, as shown in FIG. 15, the output side terminal (0) of the decoder 101 and the line KEY are displayed.
2 is connected, a logic "1" signal is returned from the line KEY2 to the microprocessor 81. Therefore, the microprocessor 81 can determine that the attached operation panel is 5B.

Further, when the attached operation panel is 5C, in the case of the operation panel 5C, as shown in FIG. 16, the output side terminal (0) of the decoder 101 and the line KEY are displayed.
3 is connected, a logic "1" signal is returned from the line KEY3 to the microprocessor 81. Therefore, the microprocessor 81 can determine that the attached operation panel is 5C. Incidentally, FIG.
Among the decoder-related circuits of the operation panels 5A, 5B, and 5C shown in (1), the output terminals (0), (1),
(2), (3), (4) ... and the lines KEY1, KE
Each circle mark 102 in the matrix circuit formed by Y2 and KEY3 indicates a contact point of various switches and the like mounted on the operation panel board surface, and 103 indicates a light emitting diode mounted on the operation panel board surface. It shows the code. FIG. 17 shows a flow chart for the microprocessor 81 to identify the type of operation panel and to select the sewing machine control mode based on the identified operation panel. In step S1 of the above flow chart, the microprocessor 81 causes the decoder 101 to operate.
A decoding signal for outputting a logical "1" signal from the output side terminal (0) of the above is output to the decoder 101 through the microprocessor 81. In step S2, it is determined whether or not the logic "1" signal is returned from the line KEY1. If the determination result is YES, it is determined that the attached operation panel is 5A, and the control mode based on the operation panel 5A is selected as shown in step S5. On the other hand, if the decision result in the step S2 is NO, a step S3 decides whether or not the logic "1" signal is returned from the line KEY2. If the decision result in the step S3 is YES, the attached operation panel is 5
If it is judged that it is B, the control mode based on the operation panel 5B is selected as shown in step S6. On the other hand, if the decision result in the step S3 is NO, a step S4 decides whether or not the logic "1" signal is returned from the line KEY3. If the determination result in step S4 is YES, it is determined that the attached operation panel is 5C,
As shown in step S7, the control mode based on the operation panel 5C is selected. On the other hand, the judgment result of step S4 is N
In the case of O, it is determined that no operation panel is attached to the operation panel attachment portion 9, and the basic specification control mode selected when no operation panel is attached is selected.

After the control mode is selected in each of steps S5, S6, S7 and S8, the main program of the sewing machine is executed in step S9. That is, any one of the operation panels 5A, 5B, 5C is attached to the operation panel attachment portion 9, and the front / rear stop stitching mode and the fixed size are set by the stitch number setting device, the display device, etc. attached to each operation panel. Sewing mode, continuous stop stitching mode
Mode, label stitching mode, lap stitching mode, pocket stitching mode, naming stitching mode, etc. are set, and the number of stitches is set in each setting mode. After the microprocessor 81 recognizes the set number of stitches in each setting mode and stores it in the memory 82, when the microprocessor 81 recognizes that the stepping operation of the foot pedal 8 has been performed, the mode is set. Type 6
A motor drive signal for driving a motor
Then, the motor driving circuit 110 supplies a driving current to the motor 6 to drive the sewing machine. At that time, the microprocessor 81 internally counts the number of stitches moved so as to move the set number of stitches in the set sewing mode, and stops the motor 6 every time the number of stitches moved reaches the set number of stitches. Control. When the set number of stitches in each sewing mode are all completed or when a thread trimming signal is input in the middle, the microprocessor 81 outputs a thread trimming solenoid drive signal to the solenoid drive circuit 111 to drive the solenoid drive. Circuit 111
A drive voltage is applied to the thread cutting solenoid 112 from this, and a thread cutting operation is performed with a knife (not shown). In addition, when an operation signal is input from each switch or the like according to each mode, the wiper solenoid 113, the reverse rotation solenoid 115, etc. are driven to perform a thread wiping operation or a reverse operation in the cloth traveling direction. . In addition, the operation panel 5
When none of the operation panels A, 5B, and 5C is attached to the operation panel attachment portion 9, the sewing machine is operated based on the above basic specifications.

[0018]

As described above, according to the present invention, when the function of the sewing machine is improved, it can be realized by exchanging only the operation panel. Therefore, the electronic control circuit and the operation can be performed according to the function of the sewing machine as in the conventional case. Since it is not necessary to stock panels and the like, the stock management of the sewing machine becomes extremely easy, and the productivity of the sewing machine can be further improved.

[Brief description of drawings]

FIG. 1 is a schematic perspective external view of the entire sewing machine.

FIG. 2 is a perspective external view of an operation panel attachment portion of the sewing machine head.

FIG. 3 is a cross-sectional view of an operation panel mounting portion.

FIG. 4 is an external view of a guide pin.

FIG. 5 is an external view of a screw.

FIG. 6 is a cross-sectional view showing a state in which the guide pin shown in FIG. 4 and the screw shown in FIG. 5 are set in the operation panel attachment portion.

FIG. 7 is a rear perspective view of an operation panel.

FIG. 8 is an operation panel board view showing an example of the operation panel.

FIG. 9 is a plan view of an operation panel having improved functions from the operation panel of FIG.

FIG. 10 is a plan view of an operation panel that has improved functions from the operation panel of FIG.

FIG. 11 is a front view of a panel for a cover.

FIG. 12 is an electrical control block diagram.

FIG. 13 is an internal circuit diagram of the operation panel.

FIG. 14 is a detailed view of an internal circuit portion of the operation panel.

FIG. 15 is a detailed view of an internal circuit portion of the operation panel.

FIG. 16 is a detailed view of an internal circuit portion of the operation panel.

FIG. 17 is a flowchart for identifying the type of operation panel and selecting a sewing machine control mode corresponding to the identified operation panel.

[Explanation of symbols]

 1 ... Sewing machine 2 ... Sewing machine body 3 ... Table 4 ... Head 5,5A, 5B, 5C ... Operation panel 5R ... Identification signal generating circuit 6 ... Motor 7 ... Control box 9 ... Operation panel mounting section 10 ... Hole 11 ... Screw hole 12 ... Guide pin 13 ... Split groove 14 ... Screw 15 ... Inserting piece 81 ... Microprocessor 82 ... Memory 101 ... Decoder KEY1, KEY2, KEY3 ... Lines S1 to S9 ... Flower chart step

Claims (2)

(57) [Claims] To 1. A readily visible head position and orientation of the normal operation, a plurality of types of operation panels corresponding to the various functions
It is mounted so that it can be replaced,
The operation is electrically connected to the attached operation panel.
A control that activates the various functions based on the operation of the panel.
In the sewing machine with the control section, each operation panel has
Identification signal output that outputs different identification signals for each operation panel
While the circuit is provided, the control section is not
Judge whether the operation panel is attached or not and
When it is determined that the operation panel is installed,
Is the same as the identification signal output circuit of the operation panel.
Queries the type of operation panel and outputs the identification signal.
Operation panel that determines the type of the operation panel
Before the discriminating means and the operating panel discriminating means
Special machine that activates the function corresponding to the type of operation panel
Function control means and the operation panel discrimination means
It is determined that the operation panel is not attached at the position.
Basic function control means that activates basic functions when
Sewing machine characterized in that a and. 2. When the operation panel is not arranged at the head position, an appearance cover formed with the same outer dimensions as the operation panel can be arranged at the head position. The sewing machine according to claim 1, wherein the sewing machine is a sewing machine.