CN108203863A - The driving device of sewing machine - Google Patents
The driving device of sewing machine Download PDFInfo
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- CN108203863A CN108203863A CN201710821765.5A CN201710821765A CN108203863A CN 108203863 A CN108203863 A CN 108203863A CN 201710821765 A CN201710821765 A CN 201710821765A CN 108203863 A CN108203863 A CN 108203863A
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- driving circuit
- control
- sewing
- rotating speed
- speed
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- 238000009958 sewing Methods 0.000 title claims abstract description 153
- 230000002159 abnormal effect Effects 0.000 claims abstract description 23
- 238000012795 verification Methods 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000002045 lasting effect Effects 0.000 description 3
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/14—Devices for changing speed or for reversing direction of rotation
- D05B69/18—Devices for changing speed or for reversing direction of rotation electric, e.g. foot pedals
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/36—Devices for stopping drive when abnormal conditions occur, e.g. thread breakage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The present invention provides a kind of driving device of sewing machine, suitably judges the failure of driving circuit and inhibits the abnormal driving of sewing needle.Have motor, speed detector, control device, the first driving circuit with first switching element and the second driving circuit with second switch element.First switching element and second switch element are connected in series with power supply and motor.Control device implements sewing control when being instructed to sewing action, and the second driving circuit of control is made second switch element conductive and the first driving circuit is controlled motor to be made to be driven with rotating speed of target with the switch motion by first switching element.In addition, in the specified time limit for being not carried out sewing control, implementing control makes a switching elements conductive and disconnects another switch element, and the rotation for whether detecting motor based on speed detector judges come the short trouble to the first driving circuit or the second driving circuit.
Description
Technical field
The present invention relates to the driving devices of sewing machine, and more specifically, be related to sewing machine has motor, the first driving
Circuit, the second driving circuit, speed detector and control device driving device.
Background technology
In the past, the driving device as this sewing machine, it is proposed that following driving device has：Driving starts to switch,
The driving starts the driving circuit that switch is set to electrical motor of sewing machine；Speed adjustment circuit, being used with speed adjusting can power transformation
Hinder device and the switch element with variable resistance co-operating；Circuit is cut off, in the case of switching element short-circuits, makes driving
Circuitry cuts (for example, with reference to patent document 1).Cut-out circuit has：Temperature fuse is connected with the driving circuit of sewing machine
Connection；And resistance, it is set close to temperature fuse, and start switch in parallel with driving and connect.For circuit should being cut off, if
Start switching element short-circuits in a state that switch disconnects in driving, then the electric current for flowing to resistance and temperature fuse increases, because of electricity
Resistance fever causes temperature fuse molten disconnected, so as to the driving circuit of force disconnect electrical motor of sewing machine.Thereby, it is possible to prevent sewing machine
Motor abnormality high speed rotation.
Patent document 1：Japanese Unexamined Patent Publication 2006-34674 bulletins
However, in the driving device of above-mentioned sewing machine, connect because the resistance of cut-out circuit starts switch in parallel with driving
It connects, therefore cut-out circuit can only be when not operating foot control device, the short circuit of detection switch element.Therefore, if user operates foot control
Device even if then switching element short-circuits, can not also prevent electrical motor of sewing machine exception high speed rotation.In addition, in the drive of above-mentioned sewing machine
In dynamic device, even if starting when switch disconnects in driving and small electric current flows to what is connect with driving beginning switch in parallel
Resistance, therefore energy efficiency reduces.
Invention content
The main purpose of the driving device of the sewing machine of the present invention is that the appropriate failure for judging driving circuit simultaneously inhibits to stitch
The abnormal driving of swage.
The driving device of the sewing machine of the present invention is realizes that above-mentioned main purpose takes following means.
The purport of the driving device of the sewing machine of the present invention is have：
Motor drives sewing needle；
First driving circuit has the first switching element being connected in series with from power supply with the motor；
Second driving circuit has and is connected in series with from the power supply with the motor and the first switching element
Second switch element；
Speed detector is detected the rotating speed of the motor；And
Control device when being instructed to sewing action, implements sewing control, controls the second circuit, makes described
Second switch element conductive, and first driving circuit is controlled, by the switch motion of the first switching element, make described
Motor is driven with rotating speed of target；In the specified time limit for being not carried out the sewing control, control device control described first is driven
Dynamic circuit and second driving circuit, make a switch element in the first switching element and the second switch element
It is connected and disconnects another switch element, and implement whether to detect the rotation of the motor based on the speed detector
The Fisrt fault judgement judged come the short trouble to first driving circuit or second driving circuit.
The driving device of the sewing machine of the present invention has：Motor, first driving circuit with first switching element, tool
There are the second driving circuit, speed detector and the control device of second switch element.Control device is being instructed to sewing
During action, implement sewing control, control the second driving circuit, make second switch element conductive, and control the first driving circuit, with
By the switch motion of first switching element, motor is made to be driven with rotating speed of target.First switching element and second switch element
It is connected in series with power supply and motor.Therefore, even if a switching element short-circuits, can also be pressed down by disconnecting another switch element
Motor processed is driven with abnormal speed.In addition, control device is in the specified time limit for being not carried out sewing control, the first driving of control
Circuit and the second driving circuit make a switching elements conductive and disconnect another switch element, and according to speed detector
Whether detect the rotation of motor, judge come the short trouble to the first driving circuit or the second driving circuit.As a result,
The short trouble of the first driving circuit or the second driving circuit can be suitably judged using speed detector.
It in the driving device of the sewing machine of such present invention, can be set as, as the specified time limit, referred to
During this section, implement the Fisrt fault judgement until the sewing control is started after having shown the sewing action.In this way, energy
Enough before sewing control is started, the failure of the first driving circuit or the second driving circuit is judged in advance.
In addition, in the driving device of the sewing machine of the present invention, it can be set as, the control device performs low speed control
System controls first driving circuit and second driving circuit, makes the motor to be less than the regulation of the rotating speed of target
Rotating speed is driven in the entire stipulated time, later, performs usually control, controls first driving circuit and second driving
Circuit makes the motor be driven with the rotating speed of target, and as the sewing control, the control device is at least described low
In the implementation procedure of speed control, perform based on whether the rotating speed detected by the speed detector exceeds more than the regulation
Rotating speed and the first rotating speed less than the specified maximum (top) speed of the motor carry out the short trouble progress to first driving circuit
Second fault verification of judgement, and at least in the implementation procedure of low speed control, when the rotating speed is more than described first turn
When fast, second driving circuit is controlled, disconnects the second switch element.It so, it is possible before usually control is started, fit
The failure of the first driving circuit of locality judgement.In addition, even if in the implementation procedure of low speed control, the first driving circuit occurs short
Road failure can also inhibit sewing needle to be driven with abnormal speed.
Also, it in the driving device of the sewing machine in the present invention, can be set as, the control device is in the sewing control
In the implementation procedure of system, implement whether to exceed more than the rotating speed of target based on the rotating speed detected by the speed detector
The third fault verification that is judged come the short trouble to first driving circuit of the second rotating speed, and in the sewing control
In the implementation procedure of system, when the rotating speed is more than second rotating speed, second driving circuit is controlled, makes described second to open
Element is closed to disconnect.It so, it is possible in the implementation procedure usually controlled, the appropriate failure for judging the first driving circuit.In addition, i.e.
Make in the implementation procedure usually controlled, short trouble occurs for the first driving circuit, can also inhibit sewing needle with abnormal speed
It is driven.
In addition, in the driving device of the sewing machine of the present invention, can be set as, the control device be determined as it is described
In the case of first switching element short circuit, as the sewing control, second driving circuit is controlled, to pass through described second
The switch of switch element makes the motor be driven with the rotating speed of target.In this way, even if short circuit occurs in the first driving circuit
In the case of failure, also can sewing action suitably be performed by the second driving circuit.
In addition, in the driving device of the sewing machine of the present invention, it can be set as, the aobvious of provisioning information can be shown by having
Showing device, the control device is in the abnormal rotation that the motor is detected by the speed detector, in the display
Device alerts display as defined in implementing.In this way, when the first driving circuit or the second driving circuit may break down, it can
Suitably arouse user to pay attention to.
Description of the drawings
Fig. 1 is the schematic structural diagram for the structure for showing sewing machine 10.
Fig. 2 is the definition graph of the electrical connection for the driving device 20 for showing sewing machine.
Fig. 3 is the flow chart for an example for showing sewing control program.
Fig. 4 is the flow chart for an example for showing fault verification program.
Fig. 5 is the feelings for showing the timing variations of the rotating speed V and transistor T1, T2 of direct current generator 22 between switch motion state
The definition graph of condition.
Fig. 6 is the flow chart for the sewing control program for showing variation.
Specific embodiment
Illustrate the mode for implementing the present invention using embodiment.
【Embodiment】
Fig. 1 is the structure chart for the architectural overview for showing sewing machine 10, and Fig. 2 is to show that the driving device 20 of sewing machine is electrically connected
Connect the definition graph of relationship.As shown in the figure, sewing machine 10 erected by board 11, from the right end of board 11 fuselage 12, from fuselage 12
The upper end head 13 stretched out to the left parallel with board 11 form.
In the top end part of head 13, sewing needle 14 is provided in a manner of stretching out downwards.Sewing needle 14 is via not shown
Shank, crank mechanism etc., with extending from the top end part of head 13 (left part) to base end part (right part) as main shaft
Upper axis 50 (referring to Fig. 2) connection.On upper axis 50, the rotary shaft of direct current generator 22 (referring to Fig. 2) is linked with via transmission mechanism,
Upper axis 50 is driven to rotate by direct current generator 22, and the rotary motion of upper axis 50 is converted to the fortune up and down of shank by crank mechanism
Dynamic, thus sewing needle 14 can move up and down.In addition, sewing needle 14 can be by the oscillating machine (not shown) driven by upper axis 50
Structure is swung along the left and right directions orthogonal with cloth-feeding direction.In addition, as shown in Fig. 2, upper axis 50 be equipped with including slit disk,
The rotary encoder 52 of light-emitting component, photo detector is output to control dress by the signal of self-rotation encoder in future 52
40 are put, it can be by the rotating speed of axis 50 in 40 operation of control device, i.e. the rotating speed V of direct current generator 22.
On board 11, in the lower section of sewing needle 14, it is provided with needle plate 15, rotating shuttle device (not shown).Rotating shuttle device by
Power drive from lower shaft (not shown), the lower shaft is in a manner of with upper 50 synchronous rotary of axis via transmission mechanism and upper axis 50
Connection, rotating shuttle device by the co-operating with sewing needle 14, make to reach the standard grade with offline intertexture and form stitching.In addition, rotating shuttle fills
Vertical rotating shuttle, horizontal rotary hook can be used by putting.
In addition, as shown in Figure 1, the front surface in head 13 is provided with operation panel 30.Operation panel 30 has：Start/
Shutdown switch 31, for being pressed when to make to start sewing and when stopping sewing；Switching switch 32 is set, is used for packet
Include the various setting menus progress including pattern types setting, pattern magnitude setting, stitch length setting, sewing velocity setting etc.
Switching；Set amount alternation switch (left-handed opening, right switch) 33 is used for the selection to pattern, the numerical value of setting changes；With
And display device (LED display) 34, it is used for aobvious to including selected pattern, the numerical value of setting, sewing velocity, warning
Show, the various information including mistake is shown etc. are shown.In the present embodiment, in the case where setting sewing velocity, when with
After setting menu is switched to setting sewing velocity, a left side for set amount alternation switch 33 is pressed using setting switching switch 32 in family
Switch, then can specify the sewing velocity of a slow grade, be switched by bottom right, then can specify the sewing speed of a fast grade
Degree.
As shown in Fig. 2, the driving device 20 of the sewing machine of embodiment has：Direct current generator 22, control device 40 and use
In the first driving circuit 24 and the second driving circuit 26 of driving direct current generator 22.First driving circuit 24 has to be seen from power supply 1
The first transistor T1 as the first thyristor being connected in series in the case of examining with direct current generator 22.Second driving
The conduct the second half that circuit 26 is connected in series in the case of having from power supply 1 with direct current generator 22 and the first transistor T1 is led
The second transistor T2 of body switch element.In addition, the first transistor T1 and second transistor T2, can use such as bipolarity brilliant
Body pipe, MOSFET (mos field effect transistor), IGBT (insulated gate bipolar transistor) etc..Power supply 1 by
Industrial power 2 and the AC rectification of industrial power 2 is formed for the rectification circuit 3 of direct current.In addition, rectification circuit 3 also may be used
To be full-wave rectifying circuit, half-wave rectifying circuit can also be.
Control device 40 is configured to the microprocessor centered on CPU 41, other than CPU 41, is also equipped at storage
The ROM 42 for managing program, RAM 43, timer 44 and the input/output terminal (not shown) functioned as working storage
Mouthful.Rotating position signal from rotary encoder 52, the operation signal from beginning/shutdown switch 31 are cut from setting
Operation signal, operation signal from set amount alternation switch 33 for changing switch 32 etc. are input to the control via input port
Device 40.In addition, via output port from the output of control device 40 for the drive of the first driving circuit 24 (the first transistor T1)
Dynamic signal, the drive signal for the second driving circuit 26 (second transistor T2) and the display signal for display device 34
Deng.
Next, illustrate the action of the driving device 20 of sewing machine configured as described above.Fig. 3 is shown by control device 40
The flow chart of one example of the sewing control program performed by CPU 41, Fig. 4 is 41 institutes of CPU shown by control device 40
The flow chart of one example of the fault verification program of execution.From the beginning of/shutdown switch 31 be carried out conducting operation after to
Following beginning/shutdown switch 31 is carried out until opening operation during this section, at intervals of set time (for example, every number
Msec), these programs are concurrently performed repeatedly.First, illustrate sewing control program, illustrate fault verification program later.
When performing sewing control program, the CPU 41 of control device 40 first in aftermentioned fault verification program, sentences
Fixed whether done to the first driving circuit 24 or 2 mistake of the second driving circuit judges (whether being during mistake generates) (step
S100).On the one hand, when in being determined as that mistake generates, sewing control is not performed, that is, terminates sewing control program.
On the other hand, when being determined as in non-erroneous generation, determine whether respectively in prepare during (step S110),
Whether it is in low speed control period (step S120), whether is in usual control period (step S130).Here, it is during preparation
Beginning/shutdown switch 31 is carried out after conducting operation until sewing is started during this section of preparation, for example, being by predetermining
During 100msec~200msec or so.Low speed control period be for slow speed implementation start sewing during,
For example, during predetermining as 500msec~1000msec or so.Usual control period is the sewing velocity indicated with user
During implementing sewing action, start usual control period after low speed control period.When being judged as in the preparatory stage
Between when, terminate sewing control program.When being judged as in low speed control period, the second driving circuit 26 of control makes the second crystalline substance
(step S140) is connected in body pipe T2, and being accounted for based on what is rotated for the regulation slow-speed of revolution Vlo for making direct current generator 22 to predetermine
Empty ratio carries out switch control (step S150) to the first transistor T1, then terminates sewing control program.In addition, when being determined as
During in usual control period, the second driving circuit 26 is controlled, makes second transistor T2 that (step S160) be connected, and based on use
In making direct current generator 22 with corresponding with the instruction sewing velocity indicated by setting switching switch 32 and set amount alternation switch 33
Instruction rotating speed Vtg rotation duty ratio, switch control (step S170) is carried out to the first transistor T1, then terminates sewing control
Processing procedure sequence.
Next, illustrate fault verification program.When performing fault verification program, the CPU 41 of control device 40 sentences first
Fixed (step S200) during whether being in the first judgement.Here, it is defined as during the first judgement identical with during above-mentioned preparation
During, be in during preparation to the failure (short circuit) of the abnormal rotation of direct current generator 22, i.e. the first transistor T1 and
During the fault verification that the failure (short circuit) of second transistor T2 is judged.When being determined as in during the first judgement, point
(step S210) during not determining whether the fault verification in the first transistor T1, failure for whether being in second transistor T2
During judgement (step S220).In addition, during the fault verification of the first transistor T1 and the fault verification phase of second transistor T2
Between be set in the first judgement during, and be set as in the present embodiment, during the fault verification of the first transistor T1 with
First judgement during start together, during the fault verification of the first transistor T1 after, the failure of second transistor T2 is sentenced
Start between periodically.When on the one hand, during the fault verification in the first transistor T1 is determined as, the first driving circuit 24 is controlled
With the second driving circuit 26, disconnect the first transistor T1 and make second transistor T2 that (step S230) be connected.On the other hand, when
When being determined as during the fault verification in second transistor T2, the first driving circuit 24 and the second driving circuit 26 are controlled, is made
The first transistor T1 is connected and second transistor T2 is made to disconnect (step S240).
When one of the first transistor T1 and second transistor T2 are set as conducting and are set as disconnecting by another one, sentence
Determine direct current generator 22 rotating speed V whether be more than Fisrt fault decision threshold Vth1 (step S250), and direct current generator 22 turn
Whether fast V is lasting (step S260) in entire first time t1 (for example, 10~20msec).Here, Fisrt fault decision threshold
Vth1 is the threshold value for judging whether direct current generator 22 is rotating, and is defined as the value slightly larger than value 0.As described above, the
One transistor T1 and second transistor T2 is connected in series with power supply 1 and direct current generator 22, as long as therefore switch element disconnect,
Even if another switching elements conductive, direct current generator 22 would not also rotate.If however, a switching element short-circuits, when another
During one switching elements conductive, direct current generator 22 rotates.Therefore, it disconnects a switch element by judgement and opens another
Whether pass element conductive, direct current generator 22 are rotating, and can determine whether a switch element breaks down.
When be determined as direct current generator 22 rotating speed V be more than Fisrt fault decision threshold Vht1, and direct current generator 22 turn
Fast V is judged as that a switch element is likely to occur failure (short circuit), in order to make direct current when entire first time t1 continues
The abnormal rotation of machine 22 stops, and controls the first driving circuit 24 and the second driving circuit 26, makes the first transistor T1 and second
Transistor T2 disconnects (step S270).Here, it during the fault verification of the first transistor T1, is that while to the first driving electricity
Control has been done on road 24 disconnects the first transistor T1, but the situation as direct current generator 22 still rotates, so, it is judged as
The first transistor T1 is likely to occur failure (short circuit).In addition, during the fault verification of second transistor T2, it is that while to
Two driving circuits 26, which have done control, disconnects second transistor T2, but direct current generator 22 is still in situation as rotation, so,
It is judged as that second transistor T2 is likely to occur failure (short circuit).Then, it shows to alert user's direct current in display device 34
Motor 22 produces the abnormal display (step S280) with warning of sewing velocity of abnormal rotation (sewing velocity).And then make table
It warns and accuses the warning counter C of number and add one (step S290), and judge whether the value for alerting counter C is more than threshold value Cth (examples
Such as, 2,3 or 4 are inferior) (step S300).When being judged to alerting that the value of counter C is below threshold value Cth, temporarily terminate event
Hinder decision procedure, when being determined as that the value for alerting counter C is more than threshold value Cth, determine the first transistor T1 or the second crystal
The failure (failure of the first driving circuit 24 or the second driving circuit 26) of pipe T2, it is different in 34 display driver circuit of display device
Often with the display (step S310) of mistake, terminate fault verification program.As a result, in the step S100 of above-mentioned sewing control program
In, in being determined as that mistake generates, regardless of whether operation starts/shutdown switch 31, all forbid all sewing actions.
It is judged to not locating during being judged to being not at the first judgement in step s 200 or in step S210, S220
During any one during the fault verification of the first transistor T1 and in during the fault verification of second transistor T2 or in step
It is determined as the rotating speed V of direct current generator 22 in Fisrt fault decision threshold Vth1 hereinafter, or judging in step S260 in rapid S250
During not continue first time t1, determined whether respectively in during the second judgement (step S320), if judge in third
Period (step S330).Here, it is mainly used for the failure in low speed control period to the first transistor T1 during the second judgement
During the fault verification that (short circuit) is judged.In the present embodiment, it is set to include from during preparation during the second judgement
Beginning to low speed control period be terminated this section during.In addition, third is set to include sentencing from second during judging
End between periodically until being instructed to terminate sewing action (to start next time/shutdown switch 31 is carried out opening operation and is
Only) during this section.
When being determined as in step s 320 in during the second judgement, the second failure determination threshold Vth2 (steps are set
S340), whether the rotating speed V of judgement direct current generator 22 is more than the second failure determination threshold Vth2 (step S350), and direct current generator
Whether 22 rotating speed V is lasting (step S360) in entire second time t2 (for example, 50~100msec).Here, the second judgement phase
Between in the second failure determination threshold Vth2 be set to than low speed control in direct current generator 22 the rotating speed of target i.e. slow-speed of revolution
The speed of Vlo big speed, in the present embodiment, be defined as the specified maximum (top) speed Vmax of direct current generator 22 1/2 turn
Speed.On the one hand, when the rotating speed V for being determined as direct current generator 22 is below the second failure determination threshold Vth2 or when being determined as
Even if when direct current generator 22 rotating speed V be more than the second failure determination threshold Vth2 when direct current generator 22 rotating speed V not entire
When second time t2 continues, terminate fault verification program.On the other hand, when the rotating speed V for being determined as direct current generator 22 is more than second
The rotating speed V of failure determination threshold Vth2 and direct current generator 22 is judged as the first transistor T1 when continuing entire second time t2
It is possible that generate failure (short circuit) and enter step S270, and in order to stop abnormal the rotating of direct current generator 22 and by first crystal
Pipe T1 and second transistor T2 are disconnected together, and show the display (step that sewing velocity is abnormal and alerts in display device 34
S270、S280).Then, warning counter C is made to add one (step S290), and judges whether the value for alerting counter C is more than threshold value
Cth (step S300).When the value for being judged to alerting counter C is below threshold value Cth, temporarily terminate fault verification program, when
When being determined as that the value for alerting counter C is more than threshold value Cth, the failure (short circuit) of the first transistor T1 is determined, in display device 34
The abnormal and wrong display (step S310) of display driver circuit, terminates fault verification program.
When being determined as in step S330 in during third judgement, the second failure determination threshold Vth2 (steps are set
S370), and whether the rotating speed V of direct current generator 22 is judged more than the second failure determination threshold Vth2 (step S380), and direct current
Whether the rotating speed V of machine 22 is lasting (step S390) in entire third time t3 (for example, 50msec~100msec).Here, third
The second failure determination threshold Vth2 in during judgement be defined as than the direct current generator 22 in usually controlling rotating speed of target i.e.
It indicates the big speed of the speed of rotating speed Vtg, in the present embodiment, is defined as the specified maximum (top) speed Vmax in direct current generator 22
The upper obtained rotating speeds of tolerance (maximum allowance) α plus direct current generator 22.On the one hand, when the rotating speed for being determined as direct current generator 22
V is the second failure determination threshold Vth2 hereinafter, being determined as that even if in the rotating speed V of direct current generator 22 be more than the second fault verification
During threshold value Vth2, the rotating speed V of direct current generator 22 also not when continuing entire third time t3, terminates fault verification program.It is another
Aspect, when the rotating speed V for being determined as direct current generator 22 is more than the rotating speed V of the second failure determination threshold Vth2 and direct current generator 22 whole
When a third time t3 continues, it is judged as the first transistor T1 it is possible that generating failure (short circuit), and enter step S270, in order to
Stop the abnormal rotation of direct current generator 22, the first transistor T1 and second transistor T2 are disconnected together and in display device 34
Show the display (step S270, S280) that sewing velocity is abnormal and alerts.Then, warning counter C is added into one (step S290),
Whether the value of judgement warning counter C is more than threshold value Cth (step S300).When the value for being judged to alerting counter C is in threshold value Cth
When following, temporarily terminate fault verification program, when being determined as that the value for alerting counter C is more than threshold value Cth, determine first crystal
The failure (short circuit) of pipe T1 in the display (step S310) that 34 display driver circuit of display device is abnormal and wrong, terminates failure
Decision procedure.
Fig. 5 is the situation for showing the timing variations of the rotating speed V and transistor T1, T2 of direct current generator 22 under on off state
Definition graph.As shown in the figure, for sewing controls, moved when the conducting operation instruction by beginning/shutdown switch 31 starts sewing
It when making (moment t1), waits for during preparing in the past (moment t2), then implements low speed control, the is switched with smaller duty ratio
One transistor T1 is connected second transistor T2 and starts to sew with slow-speed of revolution Vlo.When low speed control period (moment t4) past
When, continue to implement usually control in the state of second transistor T2 is connected, the instruction that user's instruction is reached with sewing velocity turns
The fast such duty ratios of Vtg implement the first transistor T1 switch control.And then when by sewing action to beginning/stopping
31 opening operation is switched when indicating to stop sewing action (moment t5), to be carried out with smaller duty ratio to the first transistor T1
Switch control, and the first transistor T1 is disconnected in regulation time point (moment t6), so that position stops sewing needle 14 above, later
Disconnect second transistor T2.The fault verification of the first transistor T1 and second transistor T2 is respectively including first during preparation
With difference during third judgement during the second judgement during judgement, including low speed control period, including usual control period
Mode performs.That is, first judge during, when make one in the first transistor T1 and second transistor T2 be connected and make another
During a disconnection, whether the rotating speed V by judging direct current generator 22 is (straight more than the Fisrt fault decision threshold Vth1 of slightly above value 0
Whether galvanic electricity machine 22 rotates), to carry out the fault verification of the first transistor T1 and second transistor T2.In addition, in the second judgement
Period, by judge direct current generator 22 rotating speed V whether be more than direct current generator 22 specified maximum (top) speed Vmax 1/2 value i.e.
Second failure determination threshold Vth2, to carry out the fault verification of the first transistor T1 and second transistor T2.Also, sentence in third
Whether it is more than to be added on the specified maximum (top) speed Vmax of direct current generator 22 by the rotating speed V for judging direct current generator 22 between periodically
The obtained second failure determination threshold Vth2 of tolerance α of direct current generator 22, to carry out the first transistor T1 and second transistor
The fault verification of T2.In this way, because abnormal rotation, institute whether are generated using different threshold determination direct current generators 22 in each period
Can suitably judge the failure of the first driving circuit 24 or the second driving circuit 26 in the whole period.Especially by opening
Implement fault verification during the first judgement during the beginning, during the second judgement, thus, it is possible in upper axis 50 and then direct current generator 22
During rotation is not too fast, failure is detected.
The driving device 20 of the sewing machine of embodiments illustrated above when being instructed to sewing action, implements sewing control
Second transistor T2 is connected in system, the second driving circuit 26 of control, and to the first transistor T1 of the first driving circuit 24 into
Row switch control, makes direct current generator be driven with rotating speed of target.The first transistor T1 and second transistor T2 and power supply 1 and direct current
Motor 22 is connected in series with, and therefore, even if a switching element short-circuits, also can inhibit direct current by disconnecting another switch element
Motor 22 is driven with abnormal rotate.In addition, during this section prepares until sewing control is started after sewing action is indicated (the
During one judgement), in the state of making a switching elements conductive and disconnecting another switch element, whether judgement direct current generator 22
It is rotated, therefore can judge the first transistor T1 and second transistor T2 in advance before it will start sewing control
Failure (short circuit) possibility.It that is, can be than low speed control period (during the second judgement), usual control period (third
During judgement) possibility of early stage (rotation of upper axis 50 and direct current generator 22 becomes before high speed) judgement failure.In addition,
During preparation (during the first judgement), when being determined as that rotation has occurred in direct current generator 22, by the first transistor T1 and second
Transistor T2 is disconnected together, therefore can inhibit the driving to sewing needle 14.
In addition, the driving device 20 of the sewing machine of embodiment performs low velocity control, in the shape of conducting second transistor T2
Under state, switch control is carried out to the first transistor T1, the speed for starting sewing is made to become slow-speed of revolution Vlo, and direct current at this moment
The rotating speed V of motor 22 be more than direct current generator 22 specified maximum (top) speed Vmax 1/2 speed when, disconnect the first transistor T1 and
Second transistor T2.Even if the failure (short circuit) of the first transistor T1 is can also determine that during low speed control is performed as a result,
Possibility.It that is, can be in the stage (rotation of upper axis 50 and direct current generator 22 earlier than usual control period (during third judges)
Before being conveyed to high speed), the possibility of failure is judged, so as to inhibit the abnormal high speed rotation of direct current generator 22.
Also, the driving device 20 of sewing machine according to the embodiment performs usually control, conducting second transistor T2's
Under state, switch control is carried out to the first transistor T1, sewing velocity is made to reach the instruction speed of user, and direct current at this moment
The rotating speed V of motor 22 is more than when adding the speed obtained by tolerance α on the specified maximum (top) speed Vmax of direct current generator 22, disconnects the
One transistor T1 and second transistor T2.Even if the first transistor T1 is can also determine that during usually control is performed as a result,
Failure (short circuit) possibility, so as to inhibit the abnormal high speed rotation of direct current generator 22.
In addition, the driving device 20 of the sewing machine of embodiment be determined as the abnormal rotation of direct current generator 22 (sewing velocity
It is abnormal) when, implement warning display in display device 34, therefore can be with regard to the first driving circuit 24, the second driving circuit 26
Likelihood of failure is suitably aroused user and is paid attention to.In addition, when warning number (warning counter C) reaches threshold value Cth, implement mistake
It has been shown that, the sewing control after forbidding, therefore can be ensured that higher safety.
In the driving device 20 of the sewing machine of embodiment, it is set as forbidding control of sewing, but also may be used in mistake generates
To be set as also allowing to perform sewing control in mistake generates.Fig. 6 is the flow chart for the sewing control program for showing variation.
For processing identical with the sewing control program of embodiment in each processing of the sewing control program of variation, mark identical
Number of steps illustrates to omit due to repetition.
In the sewing control program of variation, when in being determined as that mistake generates in the step s 100, to being judged as
Whether the switch element of short circuit is that the first transistor T1 is judged (step S100B).When being judged to being judged as opening for short circuit
Element is closed when being the first transistor T1, enters step S110B, and determine whether in during preparing, whether control in low speed
Period and whether be in usual control period (step S110B~S130B).When being determined as in during preparing, terminate seam
It threads and controls program.When being determined as in low speed control period, the first transistor T1 is connected in the first driving circuit 24 of control, and
Switch control is carried out to second transistor T2, direct current generator is made to rotate (step S140B, S150B) with slow-speed of revolution Vlo, is then tied
Beam sewing control program.When judgement is in usual control period, the first driving circuit 24 is controlled, leads the first transistor T1
It is logical, and switch control is carried out to second transistor T2, make direct current generator 22 to indicate rotating speed Vtg rotations (step S160B,
S170B), then terminate sewing control program.
It is second when the switch element in step S100B, being judged to being judged as short circuit is not the first transistor T1
It is identical with step S110~S170 of the sewing control program of embodiment during transistor T2, when in during preparation, directly tie
Beam sewing control program, when in low speed control period, usual control period, in the shape of second transistor T2 short-circuit (conducting)
Under state, switch control is carried out to the first transistor T1, motor 22 is made to be rotated with rotating speed corresponding with each period, then terminates to stitch
It threads and controls program.
In this way, in the sewing control program of variation, when one in the first transistor T1 and second transistor T2 opens
When closing element generation short circuit, in a state that a switching element short-circuits, pass through to another not short-circuit switch element
Switch motion is carried out, to perform sewing control.Accordingly, for the situation of the short circuit of a switch element, seam also can be suitably performed
It threads control.
In the driving device 20 of the sewing machine of embodiment, during low speed control is performed, by the second fault verification
Threshold value Vth is set as 1/2 rotating speed of the specified maximum (top) speed Vmax of direct current generator 22, and however, it is not limited to this.For example, also may be used
To be set as i.e. slightly higher slow-speed of revolution Vlo value of the rotating speed of target of the direct current generator 22 in being controlled than low speed etc., as long as higher than low
Rotating speed Vlo and less than direct current generator 22 specified maximum (top) speed rotating speed, it is possible to be set as any rotating speed.
In the driving device 20 of the sewing machine of embodiment, during usually control is performed, by the second fault verification
Threshold value Vth is set as adding the obtained speed of tolerance α of direct current generator 22 on the specified maximum (top) speed Vmax of direct current generator 22
Degree, however, it is not limited to this.For example, it is also possible to it is set as indicating to turn than the rotating speed of target of the direct current generator 22 in usually controlling
Value slightly higher fast Vtg.
In the driving device 20 of the sewing machine of embodiment, it will judge that first is brilliant during low speed control is performed
During second judgement of the failure of body pipe T1, it is set as with partly being repeated during the first judgement, but can also be set as not with the
It is repeated during one judgement.
It in the driving device 20 of the sewing machine of embodiment, is controlled as sewing, will start sewing using performing
Speed is set as the low speed control of low velocity, but can also omit low speed control.In this case, as long as omitting the sewing of Fig. 3
Control program step S120, S140, S150 processing and omit Fig. 4 fault verification program step S320, S340~
The processing of S360.
In the driving device 20 of the sewing machine of embodiment, after sewing action is instructed to until sewing control starts
During this section prepares, the first driving circuit 24 and the second driving circuit 26 are controlled, makes a switching elements conductive and makes another
Switch element disconnects, and implements the Fisrt fault judgement whether judgement direct current generator 22 is rotating.But it as long as is not carried out stitching
It threads during control, it is possible to implement Fisrt fault judgement in any period.
In the driving device 20 of the sewing machine of embodiment, during low speed control, usually control is performed, judgement is straight
Whether the rotating speed V of galvanic electricity machine 22 has been more than the second failure determination threshold Vth, and thus the short trouble of the first transistor T1 is carried out
Judgement.But in addition to this, whether can also be less than by judging the rotating speed V of direct current generator 22 than the rotating speed of target (slow-speed of revolution
Vlo, instruction rotating speed Vtg) low speed, to judge the open fault of the first transistor T1 or second transistor T2.
In the driving device 20 of the sewing machine of embodiment, in the upper axis 50 linked via transmission mechanism and direct current generator 22
Upper installation rotary encoder 52 (speed detector), however, it is not limited to this, can also use and be installed on direct current generator 22
Rotary shaft rotary encoder 52 (speed detector), can also use be installed on link with direct current generator 22 it is other
The rotary encoder 52 (speed detector) of any rotary part.
In the driving device 20 of the sewing machine of embodiment, using rotary encoder 52, as detecting direct current
The speed detector of the rotating speed of machine 22, however, it is not limited to this, as long as example, electromagnetic pickup etc. can detect direct current
The device of the rotating speed of machine 22 can use any kind of speed detector.
In the case that the first driving circuit 24 has from power supply 1 in the driving device 20 of the sewing machine of embodiment
The first transistor T1 as the first thyristor being connected in series with direct current generator 22, the second driving circuit 26 have
The second thyristor of conduct being connected in series in the case of from power supply 1 with direct current generator 22 and the first transistor T1
Second transistor T2, as shown in Fig. 2, power supply 1, direct current generator 22, the first driving circuit 24, the second driving circuit 26 are with from figure
It acts the mode being arranged in order and is connected in series in middle top.However, it is not limited to this, from the top in Fig. 2, power supply 1, direct current
Machine 22, the first driving circuit 24, the second driving circuit 26 can also be with according to power supply 1, the first driving circuit 24, direct current generators
22nd, the tactic mode of the second driving circuit 26 or according to power supply 1, the first driving circuit 24, the second driving circuit 26,
The tactic mode of direct current generator 22 is connected in series with.
In the driving device 20 of the sewing machine of embodiment, use it for driving sewing needle 14 and by the with direct current generator 22
The situation of 24 and second driving circuit 26 of one drive circuit driving direct current generator 22 is simultaneously illustrated, but can be used for exchanging
Motor drives sewing needle 14 and the situation of alternating current generator is driven by the first driving circuit 24 and the second driving circuit 26.
The correspondence of staple and the staple of invention being recorded in invention content column to embodiment carries out
Explanation.In embodiment, direct current generator 22 is equivalent to " motor ", and the first driving circuit 24 is equivalent to " the first driving circuit ", the
Two driving circuits 26 are equivalent to " the second driving circuit ", rotary encoder 52, based on the signal from rotary encoder 52
The control device 40 of the rotating speed V of operation direct current generator 22 is equivalent to " speed detector ", performs sewing control program, failure is sentenced
The control device 40 for determining program is equivalent to " control device ".
Further, since embodiment is carried out specifically for the mode to the invention described in content bar that is used to carry out an invention
A bright example, therefore the correspondence of the staple of embodiment and the staple of the invention described in invention content column
The invention element described in invention content column is not limited.That is, the explanation of the invention described in invention content column should be based on being somebody's turn to do
Record in column is implemented, a specific example of the embodiment only invention described in invention content column.
More than, the mode for implementing the present invention is illustrated using embodiment, but the present invention is not made by such embodiment
Any restriction can in various ways be implemented in the range of the gist of the invention is not departed from certainly.
【Industrial availability】
The present invention can be used in process industry of the driving device of sewing machine etc..
Claims (6)
1. a kind of driving device of sewing machine, wherein, have：
Motor drives sewing needle；
First driving circuit has from power supply, the first switching element being connected in series with the motor；
Second driving circuit has from the power supply, is connected in series with the motor and the first switching element
Second switch element；
Speed detector is detected the rotating speed of the motor；And
Control device when being instructed to sewing action, implements sewing control, controls the second circuit, make described second
Switching elements conductive, and first driving circuit is controlled, the electricity is made with the switch motion by the first switching element
Machine is driven with rotating speed of target；In the specified time limit for being not carried out the sewing control, first driving circuit and described is controlled
Second driving circuit makes a switching elements conductive in the first switching element and the second switch element and makes another
Whether a switch element disconnects, and implement to detect the rotation of the motor come to described first based on the speed detector
The Fisrt fault judgement that the short trouble of driving circuit or second driving circuit is judged.
2. the driving device of sewing machine according to claim 1, wherein,
It is real after the sewing action is instructed to until the sewing control is started during this section as the specified time limit
Apply the Fisrt fault judgement.
3. according to the driving device of sewing machine described in claims 1 or 2, wherein,
The control device performs low speed control, controls first driving circuit and second driving circuit, makes the electricity
Machine is driven with being less than the egulation rotating speed of the rotating speed of target in the entire stipulated time, later, is performed usually control, that is, is controlled institute
The first driving circuit and second driving circuit are stated, the motor is made to be driven with the rotating speed of target, as the sewing
Control,
Also, the control device is implemented to be based on being filled by the Rotating speed measring at least in the implementation procedure of low speed control
Put the first the rotating speed whether rotating speed detected exceeds more than the egulation rotating speed and the specified maximum (top) speed less than the motor
Come the second fault verification that the short trouble to first driving circuit is judged, and at least holding in low speed control
During row, when the rotating speed is more than first rotating speed, second driving circuit is controlled, makes the second switch element
It disconnects.
4. sewing machine actuating device described in any one of claim 1 to 3, wherein,
The control device is implemented in the implementation procedure of the sewing control based on being detected by the speed detector
Whether rotating speed exceeds more than the second rotating speed of the rotating speed of target judges come the short trouble to first driving circuit
Third fault verification, and it is described sewing control implementation procedure in, when the rotating speed be more than second rotating speed when, control
Second driving circuit disconnects the second switch element.
5. the driving device of sewing machine according to any one of claim 1 to 4, wherein,
The control device is in the case where being determined as that short circuit has occurred in the first switching element, control the second driving electricity
Road makes the motor be driven with the rotating speed of target, as the seam with the switch motion by the second switch element
It threads control.
6. the driving device of sewing machine according to any one of claim 1 to 5, wherein,
The display device of provisioning information can be shown by having, the control device detected by the speed detector it is described
During the abnormal rotation of motor, implement defined warning display in the display device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016245382A JP2018099156A (en) | 2016-12-19 | 2016-12-19 | Sewing machine drive |
| JP2016-245382 | 2016-12-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108203863A true CN108203863A (en) | 2018-06-26 |
Family
ID=59887161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710821765.5A Pending CN108203863A (en) | 2016-12-19 | 2017-09-13 | The driving device of sewing machine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3336232A1 (en) |
| JP (1) | JP2018099156A (en) |
| CN (1) | CN108203863A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4400657A (en) * | 1981-11-30 | 1983-08-23 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Triac failure detector |
| US4490656A (en) * | 1983-06-30 | 1984-12-25 | The Singer Company | Overload protection in a motor control system |
| US4887307A (en) * | 1987-03-06 | 1989-12-12 | Janome Sewing Machine Co., Ltd. | Speed control apparatus for electric motor |
| GB2249560B (en) * | 1990-11-10 | 1994-04-27 | Brother Ind Ltd | Driving device for sewing machine |
| JPH09100738A (en) * | 1995-10-05 | 1997-04-15 | Denso Corp | Engine idle speed control device |
| CN1993510A (en) * | 2004-07-28 | 2007-07-04 | 兄弟工业株式会社 | Foot controller of sewing machine and sewing machine |
| CN202865571U (en) * | 2011-05-20 | 2013-04-10 | 爱信精机株式会社 | Sewing machine controller and sewing machine |
-
2016
- 2016-12-19 JP JP2016245382A patent/JP2018099156A/en active Pending
-
2017
- 2017-09-13 CN CN201710821765.5A patent/CN108203863A/en active Pending
- 2017-09-15 EP EP17191427.8A patent/EP3336232A1/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4400657A (en) * | 1981-11-30 | 1983-08-23 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Triac failure detector |
| US4490656A (en) * | 1983-06-30 | 1984-12-25 | The Singer Company | Overload protection in a motor control system |
| US4887307A (en) * | 1987-03-06 | 1989-12-12 | Janome Sewing Machine Co., Ltd. | Speed control apparatus for electric motor |
| GB2249560B (en) * | 1990-11-10 | 1994-04-27 | Brother Ind Ltd | Driving device for sewing machine |
| JPH09100738A (en) * | 1995-10-05 | 1997-04-15 | Denso Corp | Engine idle speed control device |
| CN1993510A (en) * | 2004-07-28 | 2007-07-04 | 兄弟工业株式会社 | Foot controller of sewing machine and sewing machine |
| CN202865571U (en) * | 2011-05-20 | 2013-04-10 | 爱信精机株式会社 | Sewing machine controller and sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018099156A (en) | 2018-06-28 |
| EP3336232A1 (en) | 2018-06-20 |
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