JP2007185290A - sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide first and second start command means connected to a sewing machine when equipped with a universal control device having first and second start control units respectively corresponding to first and second start command means. The correspondence with the first and second activation control units optimal for this can be automatically and easily performed without fail.
A female connector to which a foot pedal and a start / stop switch are alternatively connected is provided in the first and second control devices, and the foot pedal and the start / stop switch are provided in the first and second control devices. First and second activation control programs for controlling the activation of the sewing machine motor are provided so as to correspond to each. When the power is turned on, based on the command signal supplied to the female connector (S11 to S14), the first activation control program or the second activation control program for the activation command means connected to the female connector is activated ( S16, S18).
[Selection] Figure 9

Description

  The present invention relates to a sewing machine that can drive and control a sewing machine motor with any of different types of start command means such as a foot pedal and a start switch connected to the sewing machine when starting the sewing machine.

  2. Description of the Related Art Conventionally, for example, electronically controlled sewing machines such as a lockstitch sewing machine and an eyelet sewing machine are provided with start command means for starting a sewing machine in order to start sewing in addition to a power switch for turning on power. In general, a sewing machine that is fixed on the sewing machine table is configured to be activated by stepping on a foot pedal, and an sewing machine that is placed on a simple table and sewn is provided with an arm portion. The system is configured to be activated by operating a start switch provided in FIG.

  For example, a sewing machine presser device described in Patent Document 1 is provided with a control box containing a sewing machine motor and a control device on a lower side of a sewing machine table on which a hole sewing machine is placed, and a foot pedal on a table leg. The potentiometer is provided in the control box, and the foot pedal is connected to the contact of the potentiometer via a connecting rod.

  In this case, in the neutral state where the foot pedal is not depressed, “0V” is output from the contact, but when the foot pedal is depressed, the output voltage from the contact becomes “+ v”, and this output voltage When the presser foot is lowered according to the size of the sewing machine and the output voltage from the contact exceeds “+ v1”, a sewing start command is output and the sewing machine motor is driven.

  The electronically controlled sewing machine described in Patent Document 2 is provided with a start / stop button for a start / stop switch for commanding start and stop of the sewing work on the head of the arm portion. When the start / stop button is operated by the operator, the sewing machine motor is driven by turning on the start / stop switch.On the other hand, when the start / stop button is operated again by the operator, the start / stop switch is turned off. The drive is stopped.

  In other words, the output voltage from the potentiometer is input to the input / output interface or the analog port of the CPU and A / D converted, and the start command is output when the input voltage is equal to or higher than a predetermined threshold, A switch signal from the start / stop switch is input to the input / output interface or the digital port of the CPU, and a start command is output based on the “L” level or “H” level of this signal.

  Thus, depending on the type of the sewing machine, a plurality of types of start command control corresponding to the start command means for commanding the start of the sewing machine are required. Therefore, as a sewing machine manufacturer, manufacturing multiple types of control devices individually corresponding to multiple types of start command control not only increases the manufacturing cost, but also complicates inventory management of the control device, and the number of parts. However, there is a problem that productivity and cost are lowered.

Therefore, recently, there is a tendency to manufacture one type of universal control device that can handle all start command means, and to install this universal control device in each type of sewing machine. In this case, jumper wires and dip switches for switching the start command control between the analog specification and the digital specification are provided in the control device, so that the manufacturer's operator can use the "step pedal type" start command means when shipping the sewing machine. In this case, the analog specification is switched by a jumper wire or a dip switch. On the other hand, when the start command means is “start switch type”, the digital specification is switched by a jumper wire or a dip switch.
JP 2001-149681 A (Pages 5-6, FIGS. 1 and 9) Japanese Patent Laid-Open No. 11-235485 (5th page, FIGS. 1 and 2)

  As described above, when shipping a sewing machine equipped with a universal control device capable of handling all the start command means, the operator must set a jumper wire or dip for each machine to be shipped, depending on the start command means equipped. Since the switch is switched between the analog specification and the digital specification by the switch, there is a problem that the specification switching work becomes troublesome and there is a possibility that an error occurs in the specification switching.

  It is an object of the present invention to provide first and second activations connected to a sewing machine when equipped with universal control devices having first and second activation control units corresponding to first and second activation command means, respectively. The correspondence between the command means and the first and second start control units optimal for the command means can be automatically and easily performed without fail.

  According to another aspect of the present invention, there is provided a sewing machine comprising: a start command unit that commands the start of the sewing machine; and a drive control unit that controls the drive of the sewing machine motor based on the start command signal received from the start command unit. The signal input unit is connected to the output signal lines of the first and second start command means having different formats, and the drive control means corresponds to the first and second start command means, respectively. A first input control unit configured to control the start of the sewing machine motor based on a command signal supplied from the first and second start command means to the signal input unit; and a signal input unit when the power is turned on. And determining means for determining which one of the first and second start command means is connected to the signal input section, and determining whether the determination means is connected to the signal input section. 1 start command means or 1st The first activation control unit or the second activation control unit for starting command means is that a operation command means for actuating.

  Since the drive control means is provided with the first and second start control units so as to correspond to the first and second start command means, respectively, the first and second start command means of different formats are provided in the signal input part. If any one of them is connected, when the power is turned on, it is determined by the determining means which of the first and second start command means is connected to the signal input unit. And the 1st starting control part or the 2nd starting control part with respect to either of this connected 1st, 2nd starting command means is act | operated.

  A sewing machine according to a second aspect is the sewing machine according to the first aspect, wherein the determination means has a first input to the signal input section when none of the command signals from the first and second start command means is supplied to the signal input section. It is determined that none of the second activation command means is in a disconnected state.

  A sewing machine according to a third aspect includes the display device having a display according to the first aspect, wherein the drive control means includes a first activation command means or a second activation command means which is determined that the determination means is connected to the signal input unit. The symbol or name to be displayed is displayed on the display.

  According to a fourth aspect of the present invention, in the third aspect, when the drive control unit determines that the determination unit is in the disconnected state, the drive control unit displays on the display that the connection unit is in the disconnected state.

  According to a fifth aspect of the present invention, in the sewing machine according to the first to fourth aspects, the first start command means is constituted by a foot pedal having an analog circuit including a potentiometer.

  A sewing machine according to a sixth aspect is the sewing machine according to any one of the first to fourth aspects, wherein the second activation command means is constituted by an on / off switch.

  According to the first aspect of the present invention, in the sewing machine provided with the start command means for instructing the start of the sewing machine, and the drive control means for controlling the drive of the sewing machine motor based on the start command signal received from the start command means. A signal input unit provided in the control unit, first and second start control units provided in the drive control unit, and first and second start command units connected to the signal input unit when the power is turned on. A discriminating means for discriminating; and an operation command means for operating the first activation control unit or the second activation control unit with respect to the first activation command means or the second activation command means connected to the signal input unit, and driving the sewing machine When one of the first and second start command means having different formats is connected to the signal input section provided in the control means, any of the first and second start command means is connected to the signal input section when the power is turned on. Is connected to Since the first start control unit or the second start control unit for any of the connected first and second start command means is operated, the first and second start command means connected to the sewing machine and this Can be automatically and easily associated with the first and second activation control units that are optimal for the above.

  According to a second aspect of the present invention, the determination means includes the first and second activations in the signal input section when none of the command signals from the first and second activation instruction means is supplied to the signal input section. Since it is determined that none of the command means is connected, it is possible to easily and reliably detect an inadequate non-connection state in which no activation means is connected. Other effects similar to those of the first aspect are obtained.

  According to a third aspect of the present invention, a display device having a display is provided, and the drive control means is a symbol representing the first start command means or the second start command means determined that the determination means is connected to the signal input unit or Since the name is displayed on the display, the first activation command means or the second activation command means connected to the sewing machine can be easily and reliably confirmed by the symbol or name displayed on the display. Other effects similar to those of the first aspect are obtained.

  According to the invention of claim 4, when the drive control means determines that the determination means is in the non-connected state, the drive control means displays on the display that it is in the non-connection state, so any activation means is connected. It is possible to easily and surely confirm the incomplete unconnected state that is not displayed. Other effects similar to those of the third aspect are achieved.

  According to the invention of claim 5, since the first activation command means is constituted by a foot pedal having an analog circuit including a potentiometer, the sewing machine can be activated by a stepping operation of the foot pedal. Other effects similar to those of any one of claims 1 to 4 can be achieved.

  According to the sixth aspect of the present invention, since the second start command means is constituted by an on / off switch, the sewing machine can be started by turning on the on / off switch. Other effects similar to those of any one of claims 1 to 4 can be achieved.

  The lockstitch sewing machine of this embodiment can start the sewing machine motor by stepping on the foot pedal when the foot pedal is connected as the start command means, while this switch is activated when the start / stop switch is connected as the start command means. The sewing machine motor can be started by operating the start / stop switch.

  As shown in FIG. 1, the lockstitch sewing machine M1 is placed on the work table 6A and faces the bed 1A, the pedestal 2A erected on the right side of the bed 1A, and the bed 1A. And an arm portion 3A extending leftward from the upper portion of the pedestal portion 2A. The bed portion 1A is provided with a thread trimming mechanism (not shown), a rotary hook (not shown), and the like, and a bobbin around which a lower thread is wound is detachably mounted on the rotary hook.

  Although not shown, a main shaft driven by a sewing machine motor is provided inside the arm portion 3A, and a needle bar driving mechanism (not shown) that drives a needle bar (not shown) up and down by the main shaft is provided on the head 4A. And a needle bar swinging mechanism (not shown) that swings the needle bar left and right. The pedestal portion 2A is provided with a cloth feed adjustment dial 5A for adjusting the cloth feed amount for feeding the work cloth in the forward direction or the reverse direction, and a reverse stitching lever (not shown) for performing the reverse stitching manually. ing.

  A display / operation panel 8A is provided on the work table 6A, and a control box 12A is provided below the work table 6A. The control box 12A houses a first control device 11A composed of a microcomputer that controls the operation of each mechanism. . Further, a foot pedal 13 (this corresponds to the first activation command means) is provided on the foot portion of the work table 6A.

  The pedal 13p of the foot pedal 13 is urged upward by an urging spring (not shown) so that the operator can step on the pedal 13p. A potentiometer 13a is provided inside the foot pedal 13 (see FIG. 3). The display operation panel 8A is provided with a liquid crystal display 9A and switches 10A including a plurality of operation switches.

Next, the outline of the control system of the lockstitch sewing machine M1 will be described based on the block diagram of FIG.
The first control device 11A housed in a control box 12A provided in the lockstitch sewing machine M1 includes a microcomputer including a CPU 15A, a RAM 16A, a flash memory 17A, and the like, a drive circuit 18A for driving the sewing machine motor 20A, and the like. Yes. The first control device 11A is provided with a single female connector 19A (which corresponds to a signal input unit). Here, the first control device 11A corresponds to drive control means.

  As shown in FIG. 3, the connecting line 14A extending from the contact of the potentiometer 13a mounted on the foot pedal 13 is connected to the analog port 15a of the CPU 15A via the male connector 14a and the female connector 19A connected thereto. It is connected to the. On the other hand, the 5V supply line is connected to the + V terminal 15b of the CPU 15a via the male connector 14a and the female connector 19A.

  In addition to the sewing machine motor drive control program for driving the sewing machine motor 20A, the flash memory 17A includes a control program for start command type discrimination control, which will be described later, which is unique to the present application, a control program for the first start control by the foot pedal 13, A control program or the like for the second start control by the stop switch is stored. Further, the RAM 16A is provided with various memories necessary for executing the sewing process, various work memories, buffers, pointers, and the like as necessary.

  In this manner, one side of the potentiometer 13a is connected to the analog port 15a of the CPU 15A via the connection line, the male connector 14a and the female connector 19A, and the other side of the potentiometer 13a is connected to the connection line, the male connector 14a and the female type. The connector 19A is connected to the + V terminal 15b of the CPU 15A.

  Therefore, as shown in FIG. 4, when the foot pedal 13 is not connected to the analog port 15a of the CPU 15A via the male connector 14a and the female connector 19A, the analog port 15a has "V1 (about 1V or less) "is supplied.

  On the other hand, when the foot pedal 13 is connected to the analog port 15a of the CPU 15A, a voltage of “V2 (about 2.0 V)” is supplied to the analog port 15a. When the depression of the foot pedal 13 is started, the presser foot is lowered until the input voltage of the analog port 15a reaches “V3”. When the input voltage of the analog port 15a reaches “V3”, the activation signal is Is output. When the foot pedal 13 is fully depressed, the input voltage of the analog port 15a is “V4 (about 4V)”. However, V1 <V2 <V3 <V4.

  As shown in FIG. 5, the lockstitch sewing machine M2 is opposed to the bed 1B placed on the work table 6B, the pedestal 2B standing on the right side of the bed 1B, and the bed 1B. The arm portion 3B extends to the left from the upper portion of the pedestal portion 2B. Here, the bed portion 1B, the arm portion 3B, and the operation panel 8B are configured in the same manner as the above-described lockstitch sewing machine M1. However, instead of omitting the foot pedal 13, a start / stop switch 22 for instructing the start of the lockstitch sewing machine M2 to the front end of the arm portion 3B (this is the second start command means and corresponds to the on / off switch). ) Is provided.

  Next, an outline of the control system of the lockstitch sewing machine M2 will be described based on the block diagram of FIG. However, since the second control device 11B housed in the control box 12B of the main sewing machine M2 is configured in the same manner as the first control device 11A described above, the same reference numerals are given and description thereof is omitted. The flash memory 17B stores a control program similar to the flash memory 17A provided in the first control device 11A of the lockstitch sewing machine M1.

  Here, as shown in FIG. 7, the start / stop switch 22 is an NC type (normal / close type), and the common terminal 22a is a connection line, a male connector 14b, and a female connector 19B (this corresponds to a signal input section). The first terminal 22b is connected to the GND terminal (ground terminal) 15d of the CPU 15B via the connection line, the male connector 14b, and the female connector 19B, and is connected to the digital port 15c of the CPU 15B. The two terminals 22c are in an open state. However, + 5V is always applied to the digital port 15c inside.

  Therefore, as shown in FIG. 8, when the start / stop switch 22 is not connected to the digital port 15c of the CPU 15B, a voltage of "H" level (about 5V) is supplied to the digital port 15c. On the other hand, when the start / stop switch 22 is connected to the digital port 15c via the male connector 14b and the female connector 19B, the start / stop switch 22 is in an OFF state, and therefore the digital port 15c has “L”. "Level (about 0V) voltage is supplied. Therefore, when the start / stop switch 22 is turned on at the start of sewing, the common terminal 22a and the second terminal 22c come into contact with each other, so that the input voltage of the digital port 15c is switched to the “H” level.

  Next, a start command type determination control routine executed by the first control device 11A of the main sewing machine M1 or the second control device 11B of the main sewing machine M2 will be described based on the flowchart of FIG. However, in the figure, reference sign Si (i = 11, 12, 13,...) Represents each step.

  When the main sewing machine M1 or the main sewing machine M2 is powered on, this control is started. First, the input voltage EA of the analog port 15a is read (S11). When the read input voltage EA is equal to or lower than V1, that is, when the foot pedal 13 is not connected to the first and second control devices 11 (S12: Yes), the input voltage EB of the digital port 15c is read. (S13). When the read input voltage ED is at “H” level, that is, when the start / stop switch 22 is not connected to the first and second control devices 11A and 11B (S14: Yes), the liquid crystal display 8A, “Connection error” is displayed in 8B (S15).

  On the other hand, when the input voltage EA is larger than V1, that is, when the foot pedal 13 is connected to the first and second control devices 11A and 11B (S12: No), the start control by the foot pedal 13 is executed. In other words, the first activation control (see FIG. 10) by the foot pedal 13 described later is set to operate (S16). Further, the message “Starting is the foot pedal 13” is displayed on the liquid crystal displays 8A and 8B (S17).

  However, when the input voltage ED is at the “L” level and the start / stop switch 22 is connected to the first and second control devices 11A and 11B (S14: No), the start / stop switch 22 It is set so that the start control is executed, that is, the second start control (see FIG. 11) by the start / stop switch 22 described later is operated (S18). Further, the message “Start is a start / stop switch” is displayed on the liquid crystal displays 9A and 9B (S19).

  Next, the routine of the first activation control by the foot pedal 13 executed by the first control device 11A of the main sewing machine M1 or the second control device 11B of the main sewing machine M2 will be described based on the flowchart of FIG.

  When this control is started, first, the input voltage EA of the analog port 15a is read (S21). When the input voltage EA is equal to or higher than V2 and smaller than V3 (S22), vertical drive control (not shown) for raising or lowering the presser foot according to the input voltage EA is executed (S23). On the other hand, when the input voltage EA is V3 (S22), since it is a start command, the sewing machine motors 20A and 20B are driven and controlled (S24).

  By the way, when the input voltage EA is not less than V3 and not more than V4 (S22), the speeds of the sewing machine motors 20A, 20B are controlled according to the input voltage EA (S25, S26: No). When the input voltage EA becomes smaller than V3 (S26: Yes), the driving of the sewing machine motors 20A and 20B is stopped (S27), and the steps after S21 are extended and executed.

  Next, the routine of the second start control by the start / stop switch 22 executed by the first control device 11A of the main sewing machine M1 or the second control device 11B of the main sewing machine M2 will be described based on the flowchart of FIG. To do.

  When this control is started, first, the input voltage ED of the digital port 15c is read (S31). When the input voltage ED is switched from the “L” level to the “H” level (S32), since it is a start command, the sewing motors 20A and 20B are driven and controlled (S33). On the other hand, when the input voltage ED is switched from the “H” level to the “L” level (S32), the driving of the sewing machine motors 20A and 20B is stopped (S34), and the steps after S31 are extended and executed.

  Next, the operation and effect of the main sewing machine M1 configured as described above will be described. However, the foot pedal 13 is connected to the female connector 19A of the first control device 11A in order to activate the main sewing machine M1.

  When the main sewing machine M1 is powered on, the input voltage EA of the analog port 15a is read. At this time, since the foot pedal 13 is connected to the first control device 11A, the input voltage EA is larger than V1. Therefore, “the activation is a foot pedal” is displayed on the liquid crystal display 9A, and the first activation control by the foot pedal 13 is set to operate.

  When the operator depresses the foot pedal 13 at the start of sewing, the presser foot first descends, and when the input voltage EA of the analog port 15a reaches V3, the sewing machine motor 20A is driven to start sewing. The However, when the operator stops stepping on the foot pedal 13 at the end of sewing, the driving of the sewing machine motor 20A is stopped and the presser foot is raised.

  Next, operations and effects of the lockstitch sewing machine M2 will be described. However, the start / stop switch 22 is connected to the female connector 19B of the second control device 11B for starting the main sewing machine M2 in the main sewing machine M2.

  When the power source is turned on to the main sewing machine M2, the input voltage EA of the analog port 15a is read. At this time, since the foot pedal 13 is not connected to the second control device 11B, the input voltage EA is V1 or less. However, since the input voltage ED of the digital port 15c is “L” level, “Start is a start / stop switch” is displayed on the liquid crystal display 9B, and the second start control by the start / stop switch 22 is activated. Set to do.

  Then, when starting sewing, when the operator turns on the start / stop switch 22, the sewing machine motor 20B is driven to start sewing. However, when the operator turns off the start / stop switch 22 at the end of sewing, the driving of the sewing machine motor 20B is stopped.

  Here, each of the first and second control devices 11A and 11B corresponds to drive control means. Further, a first activation control unit is constituted by a first activation control program or the like by the foot pedal 13, and a second activation control unit is constituted by a second activation control program or the like by the activation / stop switch 22. Further, the determining means is constituted by the start command format determining control, particularly S11 to S14. Further, the operation command means is constituted by the start command type discrimination control, particularly S16, S18 and the like.

  In this way, when any of the step pedal 13 and the start / stop switch 22 of different types is connected to the female connectors 19A and 19B provided in the control devices 11A and 11B of the lock stitching machines M1 and M2, the power source At the time of turning on, it is determined which of the foot pedal 13 and the start / stop switch 22 is connected to the female connectors 19A and 19B, and whether the foot pedal 13 or the start / stop switch 22 is connected is determined. Since the 1 start-up control program or the 2nd start-up control program is operated, the foot pedal 13 connected to the lockstitch sewing machines M1 and M2, the start / stop switch 22, and the optimum first and second start control programs The association can be performed automatically, easily, and definitely.

  Further, when neither the foot pedal 13 nor the command signal from the start / stop switch 22 is supplied to the female connectors 19A, 19B, any of the foot pedal 13 and the start / stop switch 22 to the female connectors 19A, 19B. Is not connected and is displayed on the liquid crystal displays 9A and 9B to indicate that it is not connected. Therefore, an inadequate disconnected state in which any start command means is not connected is detected. And it can confirm easily and reliably via liquid crystal display 9A, 9B.

  Further, when the power is turned on, the names representing the foot pedal 13 or the start / stop switch 22 connected to the female connectors 19A and 19B are displayed on the liquid crystal displays 9A and 9B, so that they are connected to the lockstitch sewing machines M1 and M2. The foot pedal 13 or the start / stop switch 22 can be easily and reliably confirmed by the names displayed on the liquid crystal displays 9A and 9B.

Next, a modified embodiment in which the above embodiment is partially modified will be described.
1) In S17 of the start command format discrimination control, a symbol representing this may be displayed instead of the name “step pedal”.

2) Instead of the name “start / stop switch” in S19 of the start command format discrimination control, a symbol representing this may be displayed.

3) The present invention is not limited to the above-described embodiment, and those skilled in the art can implement the present invention by adding various modifications without departing from the spirit of the present invention. The present invention includes such modifications.

It is a front view of the 1st lock stitch sewing machine concerning the example of the present invention. It is a schematic block diagram of the control system of a 1st lock stitch sewing machine. It is a connection diagram of CPU and foot pedal. It is a time chart which shows the input voltage of the analog port in a foot pedal connection state. It is a front view of the 2nd lockstitch sewing machine concerning the example of the present invention. It is a schematic block diagram of the control system of a 2nd sewing machine. It is a connection diagram of a CPU and a start / stop switch. It is a time chart which shows the input voltage of the digital port in a start / stop switch connection state. It is a flowchart of starting instruction | command format discrimination | determination control. It is a flowchart of the 1st starting control by a foot pedal. It is a flowchart of the 2nd starting control by a start / stop switch.

Explanation of symbols

M1 1st sewing machine M2 2nd sewing machine 8A Operation panel 8B Operation panel 9A Liquid crystal display 9B Liquid crystal display 13 Foot pedal 13a Potentiometer 22 Start / stop switch

Claims (6)

In a sewing machine comprising start command means for instructing start of the sewing machine, and drive control means for driving and controlling the sewing machine motor based on the start command signal received from the start command means,
A signal input unit provided in the drive control means, to which the output signal lines of the first and second start command means of different formats are alternatively connected;
The drive control means is provided to correspond to the first and second start command means, respectively, and the sewing machine motor is started based on a command signal supplied from the first and second start command means to the signal input unit. First and second activation control units for controlling
A discriminating means for discriminating which one of the first and second activation command means is connected to the signal input unit based on a command signal supplied to the signal input unit when the power is turned on;
An operation command means for activating the first start control unit or the second start control unit for the first start command means or the second start command means determined that the determination means is connected to the signal input unit, A sewing machine characterized by that.   The determination means is connected to the signal input section when the command input from the first and second start command means is not supplied to the signal input section. The sewing machine according to claim 1, wherein the sewing machine is determined to be in an unconnected state.   A display device having a display, wherein the drive control means displays on the display a symbol or name representing the first start command means or the second start command means determined that the determination means is connected to the signal input unit. The sewing machine according to claim 1, wherein   4. The sewing machine according to claim 3, wherein when the determination unit determines that the connection unit is in the disconnected state, the drive control unit causes the display to display that the connection unit is in the disconnected state.   The electronic sewing machine according to any one of claims 1 to 4, wherein the first activation command means is a foot pedal having an analog circuit including a potentiometer.   The sewing machine according to any one of claims 1 to 4, wherein the second start command means is an on / off switch.

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