CN110295463A - Sewing machine - Google Patents
Sewing machine Download PDFInfo
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- CN110295463A CN110295463A CN201910224032.2A CN201910224032A CN110295463A CN 110295463 A CN110295463 A CN 110295463A CN 201910224032 A CN201910224032 A CN 201910224032A CN 110295463 A CN110295463 A CN 110295463A
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- upper thread
- shuttle
- driving
- sewing machine
- sewing
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B47/00—Needle-thread tensioning devices; Applications of tensometers
- D05B47/04—Automatically-controlled tensioning devices
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- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
Compared with the past the present invention relates to a kind of sewing machine, which can make the required tension of tension force of facial suture.Sewing machine has sewing unit, thread clamping mechanism, driving portion and control unit.Sewing unit includes shank, is equipped with eedle, and the shank can move up and down；And thread take-up tension lever, the up and down motion with shank is synchronously carried out up and down motion, and can lift upper thread, and sewing unit can form stitching in cloth using eedle.Thread clamping mechanism can assign tension to upper thread.Driving portion is for driving thread clamping mechanism.Control unit is used to control the driving of sewing unit and driving portion.Control unit forms stitching in cloth by the driving of control sewing unit.Control unit is during controlling the driving of sewing unit, it and is when being located at the lower dead center of up and down motion range since shank, in during until thread take-up tension lever is located at the top dead centre of up and down motion range, driving to control the supply of upper thread for control driving portion, keeps upper thread mobile to the withdrawal direction opposite with the direction of the supply.
Description
Technical field
The present invention relates to a kind of sewing machines.
Background technique
There is known a kind of sewing machine that tension force of facial suture when sewing can be controlled using impulse motor, Japanese Unexamined Patent Publications
Sewing machine disclosed in No. 89823 bulletins in 2009 has impulse motor, cable-clamping disc, encoder, operation panel and sewing machine
Motor.Impulse motor has output shaft.Sewing machine is by inputting driving pulse to impulse motor driving portion, to control impulse motor
Driving.Cable-clamping disc is fixed on output shaft.Cable-clamping disc is wound with upper thread.The rotation position of encoder detection output shaft.Operator
Tension force of facial suture is inputted to sewing machine by operation panel.When motor of sewing machine driving, sewing machine makes shank move up and down,
Execute sewing movement.When motor of sewing machine is driven, sewing machine controls impulse motor based on the testing result of encoder
Driving, so that tension force of facial suture is reached inputted tension.
Due to the material etc. of the cloth as sewing object, operator wishes the rule to move up and down in the period in shank sometimes
Timing machine changes tension force of facial suture.For sewing machine, when motor of sewing machine is driven, the driving of impulse motor is controlled, is made
It obtains tension force of facial suture and is maintained inputted tension.When therefore, using above-mentioned sewing machine, sometimes, needed for tension force of facial suture is unable to reach
Tension, sometimes, stitching become unstable, lead to that stitching defect occurs.
Summary of the invention
Compared with the past the object of the present invention is to provide a kind of sewing machine, which can make tension force of facial suture institute
Need tension.
The sewing machine of technical solution 1 includes sewing unit, which has shank and thread take-up tension lever, and shank assembly is organic
Needle, and the shank can move up and down, the up and down motion of the thread take-up tension lever and the shank is synchronously carried out up and down motion, and can
Upper thread is lifted, which can form stitching in cloth using the eedle；Thread clamping mechanism can assign the upper thread
Give tension；Driving portion is used to drive the thread clamping mechanism；And control unit, it is used to control the sewing unit and the driving
The driving in portion, the sewing machine are characterized in that the control unit is functioned as sewing control unit and clamp control unit, the seam
Control unit processed is used to control the driving of the sewing unit, forms the stitching in the cloth；The clamp control unit be used for by
It during the sewing control unit controls the driving of the sewing unit, and is to be located at up and down motion range from the shank
When lower dead center, during until the thread take-up tension lever is located at the top dead centre of up and down motion range in, control the drive
The driving in dynamic portion keeps the upper thread mobile to the withdrawal direction opposite with the direction of the supply.Sewing machine can be controlled during sewing
The driving of driving portion processed leans on the upper thread of take-up bar side to supply to control the supply of upper thread, to make to be fed into than thread clamping mechanism
The reverse movement in direction.Sewing machine can assign upper thread when thread take-up tension lever lifts upper thread appropriate by keeping upper thread mobile
Tension, thus, compared with existing sewing machine, tension needed for capable of reliably being assigned to upper thread.Therefore, with existing sewing machine phase
Than sewing machine can be such that stitching when sewing stabilizes, so as to inhibit stitching defect.
It can be, the sewing machine of technical solution 2 has cable-clamping disc, is wound with the upper thread, the driving in the cable-clamping disc
Portion is motor, which has output shaft, which supports the cable-clamping disc in such a way that the cable-clamping disc can rotate, should
Sewing machine also has encoder, which is able to detect the rotation angle of the output shaft, and the clamp control unit is in the seam
During control unit processed controls the driving of the sewing unit, the driving of the motor is controlled, makes the cable-clamping disc to supply institute
State the reverse rotation of the direction of rotation of upper thread.Sewing machine can make supply of the cable-clamping disc to upper thread by the driving of control motor
The reverse rotation in direction, to make to be fed into more mobile to direction is withdrawn by the upper thread of take-up bar side than cable-clamping disc.
It can be, the sewing machine of technical solution 3 has shuttle mechanism, which has shuttle, which has shuttle
Point can be captured using ring of the spur to the upper thread through the eedle, which makes the shuttle
Mutually linkedly rotated with the up and down motion of the eedle, the clamp control unit the shuttle mechanism make the shuttle into
Row rotation when, and be during being detached from shuttle in, control the driving of the motor, refer to during the disengaging shuttle from by the shuttle
The ring for the upper thread that point captures is detached from the shuttle and starts, until being lifted the upper thread to right by the thread take-up tension lever
During the upper thread applies until tension.Sewing machine can during being detached from shuttle in control motor driving, make upper thread to
It is mobile to withdraw direction.Sewing machine passes through the upper thread for making excessively to be supplied between cable-clamping disc and stitching and moves to direction is withdrawn,
Tension appropriate can be assigned to upper thread when thread take-up tension lever lifts upper thread, so as to inhibit in sewing because of tension force of facial suture not
Stitching defect caused by foot.
It can be, the sewing machine of technical solution 4 also has the first input unit, can utilize first input unit input first
Amount of movement, the first movement amount be the clamp control unit during the disengaging shuttle in, make the upper thread to the withdrawal
The mobile amount in direction, the control unit are also used as the first acquisition unit to function, which is based on utilizing described first
The first movement amount that input unit is inputted, the driving that acquisition will control the motor make the cable-clamping disc to the reversed rotation
The first rotation amount turned controls the driving of the motor, makes the folder in the clamp control unit is during the disengaging shuttle
Drum reversely rotates first rotation amount to described.Sewing machine can make to adjust upper thread when line tension is adjusted over there
The variable (the first rotation amount) of tension quantizes.Therefore, compared with existing sewing machine, sewing machine, which can be improved, is being detached from the shuttle phase
Between in adjust tension force of facial suture repeatability, it is compared with the past for operator, can simply adjust be detached from shuttle during
In tension force of facial suture.
It can be, the clamp control unit of the sewing machine of technical solution 5 carries out the shuttle in the shuttle mechanism
When rotation, and be during shuttle captures in, control the driving of the motor, make the cable-clamping disc to the reverse rotation, should
Shuttle capture during refer to the ring from the spur and the upper thread merge the spur to the ring of the upper thread carry out capture open
Begin, during until the ring of the upper thread captured by the spur is detached from the shuttle.Sewing machine can be in shuttle
Tension needed for being assigned in during son capture to upper thread.
It can be, the sewing machine of technical solution 6 also has test section, which can export to the control unit and institute
The supply amount i.e. corresponding output valve of upper thread supply amount that upper thread is supplied to the direction of the supply is stated, the control unit is also as output
Value acquisition unit and judging part function, and in the clamp control unit is during the shuttle captures, control the drive of the motor
It is dynamic, make the cable-clamping disc to the reverse rotation, later, which obtains the face captured by the spur
The ring of line be detached from before the shuttle during in the output valve corresponding with the upper thread supply amount, the judging part and institute
The output valve acquired in output valve acquisition unit is stated correspondingly, to whether the shuttle has occurred could not capturing the upper thread
The bouncing pilotage of ring judged.Compared with existing sewing machine, sewing machine can be accurately in the upper thread captured by spur
Bouncing pilotage whether has occurred in during before ring disengaging shuttle to be judged.
The sewing machine for being also possible to technical solution 7 also has the second input unit, can utilize second input unit input the
Two amount of movements make the upper thread to the receipts in second amount of movement is the clamp control unit during the shuttle captures
The mobile amount in direction is returned, the control unit is also used as the second acquisition unit to function, which is based on utilizing described the
Second amount of movement that two input units are inputted, the driving of the motor will be controlled by, which obtaining, makes the cable-clamping disc to described reversed
Second rotation amount of rotation controls the driving of the motor in the clamp control unit is during the shuttle captures, and makes described
Cable-clamping disc reversely rotates second rotation amount to described.Sewing machine can make adjustment face when line tension is adjusted over there
The variable (the second rotation amount) of line tension quantizes.Therefore, compared with existing sewing machine, sewing machine can be improved to be captured in shuttle
The repeatability of tension force of facial suture is adjusted in period, it is compared with the past for operator, it can simply adjust shuttle and capture the phase
Between in tension force of facial suture.
Detailed description of the invention
Fig. 1 is the perspective view of sewing machine 1.
Fig. 2 is the cross-sectional view of thread clamping mechanism 60.
Fig. 3 is the output shaft 18 of clamp motor 16 and the schematic diagram of coil 33.
Fig. 4 is the block diagram of the electrical structure of sewing machine 1.
Fig. 5 is the chart for indicating the first relational expression and the second relational expression.
Fig. 6 A~Fig. 6 D is the explanatory diagram for the process for indicating that rotating shuttle 39 captures upper thread 6.
Fig. 7 is the shuttle line of the shank curve movement for indicating shank 11, the thread take-up tension lever line amount curve of thread take-up tension lever 51, rotating shuttle 39
Measure the explanatory diagram of the supply amount of curve and upper thread 6.
Fig. 8 is the flow chart of sewing processing.
Fig. 9 is the flow chart usually handled.
Specific embodiment
Illustrate embodiments of the present invention.Following explanation using the attached left and right being indicated by arrows in Fig., front and back, up and down.
Sewing machine 1 shown in FIG. 1 is the knot tying machine for forming KNOTTING STITCH in cloth 99.
Referring to Fig.1~Fig. 6 A, illustrates the general arrangement of sewing machine 1.Sewing machine 1 has base portion 2, column sections 3 and horn
Portion 4.Base portion 2 is the pedestal of sewing machine 1, is set to the workbench horizontally extended.Base portion 2 has base main part 7
With tubular base portion 8.Base main part 7 is in substantially box-like.Tubular base portion 8 extends forwards from base main part 7.Base master
The inside in body portion 7 and the inside in tubular base portion 8 are interconnected.Tubular base portion 8 has needle in the upper surface of front end
Plate 26.Cloth 99 is placed in needle plate 26 by operator.Needle plate 26, which has, holds pin hole.Column sections 3 are from the rear portion of base main part 7
Extend upwards.Horn portion 4 extends forwards from the top of column sections 3, and opposite with base portion 2.The front end in horn portion 4 is
Top end part 5.Top end part 5 has right wall portion 5A and through hole 5B (referring to Fig. 2).Right wall portion 5A is top end part 5 positioned at right side
Wall portion.Through hole 5B penetrates through right wall portion 5A in left-right direction.
As shown in figure 4, sewing machine 1 has control device 30, operation portion 46 and pedal 38.Control device 30 is fixed on work
The lower surface of platform.Control device 30 is used to control the movement of sewing machine 1.Operation portion 46 is fixed on the upper surface of workbench.Operation
Portion 46 has display unit 48 and operating knob 47.Display unit 48 can show various information.Operating knob 47 is able to detect that operator
The various information of input.Operating knob 47 includes power button.
As shown in Figure 1, sewing machine 1 has sewing mechanism 12.Sewing mechanism 12 has shank 11, which assembles organic
Needle 10, and the shank 11 can move up and down, which can form stitching 98 (referring to figure in cloth 99 using eedle 10
6A).Sewing mechanism 12 has main motor 27 (referring to Fig. 4), upper axis 15, connecting rod, Yarn taking-up mechanism, shank up-down mechanism, shuttle
Clamp mechanism 40 and cloth-feeding device 20.Main motor 27 is supported in the rear portion in horn portion 4.Upper axis 15 horn portion 4 inside along preceding
Rear direction extends.The rear end of upper axis 15 is connected by the output shaft of shaft coupling and main motor 27.Upper axis 15 can be in main horse
It is rotated under up to 27 driving.The front end and rear end of upper axis 15 are each other on the same axis.Upper axis 15 is attached in rear end
Closely there is crank portion.Crank portion is relative to the front end of upper axis 15 and the eccentric axis of rear end.Connecting rod is in the inside of column sections 3
It vertically extends.The upper end of connecting rod is connected in such a way that the connecting rod can be rotated relative to crank portion with the crank portion
Knot.Connecting rod can move back and forth along with the rotation of upper axis 15.
Yarn taking-up mechanism and shank up-down mechanism are supported by top end part 5.Yarn taking-up mechanism has thread take-up crank and take-up
Bar 51.The front end of thread take-up crank and upper axis 15 is connected.Thread take-up tension lever 51 is set to thread take-up crank.Pass through thread take-up crank and upper axis 15
It rotates together, so that thread take-up tension lever 51 and the up and down motion of shank 11 mutually linkedly move up and down.Thread take-up tension lever 51 has upper thread
Perforation.Thread take-up tension lever 51 keeps the upper thread 6 being through in upper thread perforation.Upper thread 6 (referring to Fig. 6 A) is released successively from upper thread supply source, and
Via aftermentioned thread clamping mechanism 60, it is released to the upper thread perforation of thread take-up tension lever 51.
Shank up-down mechanism has needle bar crank connecting rod, shank 11 etc..Side of the needle bar crank connecting rod can rotate
Formula is connected with thread take-up crank, and vertically extends.Shank 11 vertically extends, and is connected with needle bar crank connecting rod
Knot.The lower end of shank 11 is equipped with eedle 10.Eedle 10 has pinprick 10A in lower end (referring to Fig. 6 A).It can will be via take-up
The upper thread 6 of the upper thread perforation of bar 51 is through in the pinprick 10A of eedle 10, so that eedle 10 keeps the upper thread 6.Pass through needle bar crank
Connecting rod is moved back and forth using the rotation of thread take-up crank, so that shank 11 moves up and down together with eedle 10.
Shuttle mechanism 40 is set to the inside in base portion 2, with lower axle and rotating shuttle 39.Lower axle is in base main part 7
The inside in portion and tubular base portion 8 extends along the longitudinal direction, and can rotate.Lower axle is connected by linking part and connecting rod, should
Lower axle mutually can linkedly carry out reciprocating rotation with the reciprocating motion of connecting rod.
As shown in Figure 6A, rotating shuttle 39 is set to the front end of lower axle, and in the lower section for holding pin hole.Rotating shuttle 39 can be with lower axle
Centered on rotate.Rotating shuttle 39 has spur 36 (referring to Fig. 6 A).Spur 36 is a part in the outer peripheral portion of rotating shuttle 39, court
That side of clockwise direction when to the main view centered on lower axle is prominent.Shuttle core sheath 32 can be assembled in rotating shuttle 39.Shuttle core sheath 32
In contain the shuttle for being wound with baseline 9.Shuttle core sheath 32 has lead division 34.Lead division 34 can be utilized, it will be from shuttle successively
The baseline 9 released guides outside into.
As shown in Figure 1 and Figure 4, cloth-feeding device 20 has movable body 31, swinging axle, cloth pushing table 37, rotary actuator 41, work feed
Plate, rack shaft 22, mobile motor 42, pressure arm 23 and compress motor 43.Movable body 31 is located at machine in a manner of it can move forward and backward
The inside of seat main part 7.Axis that swinging axle is affixed to movable body 31, vertically extending, from base main part 7 to
Top is prominent.Cloth pushing table 37 is connected in the inside of base main part 7 with movable body 31, and is set to pendulum in a swingable manner
Moving axis.Therefore, cloth pushing table 37 can be moved forward and backward together with movable body 31, further, it is possible to along a left side centered on swinging axle
Right direction is swung.Rotary actuator 41 is connected with cloth pushing table 37.It is driven by rotary actuator 41, so that cloth pushing table 37 is to put
It is swung centered on moving axis.Cloth-feeding plate is configured in the upper surface in base portion 2.Cloth-feeding plate supports cloth 99.Cloth-feeding plate can be with work feed
Platform 37 is integrally moved forward and backward and can integrally be swung with cloth pushing table 37.Cloth-feeding plate has hole in front end.It moves up and down
Eedle 10 the appearance pin hole on needle plate 26 is reached by the hole on cloth-feeding plate.
Rack shaft 22 extends along the longitudinal direction in the top of base main part 7, and can move forward and backward.Before rack shaft 22
End and the upper end of swinging axle are connected, and the rear end of rack shaft 22 is in the inside of column sections 3.Mobile motor 42 is set to branch
The inside in column portion 3.Mobile motor 42 can be such that rack shaft 22 moves forward and backward.In this case, cloth pushing table 37, cloth-feeding plate, swing
Axis and movable body 31 are integrally moved forward and backward with rack shaft 22.
Pressure arm 23 extends upwards from cloth pushing table 37, and extends forwards in the top in base portion 2.Pressure arm 23 can with give
Cloth platform 37 is integrally moved forward and backward and can integrally be swung with cloth pushing table 37.Pressure arm 23 has presser feet 24, axle portion 29 and bar portion
25.Presser feet 24 is located at the top of needle plate 26 in a manner of it can move up and down and is the front end for being located at pressure arm 23.Axle portion 29 with
Left and right directions is axially, to be located at the front-rear direction substantially central portion of pressure arm 23.Bar portion 25 is respectively provided at the left surface of pressure arm 23
With right surface, can be rotated centered on axle portion 29.The front end of bar portion 25 is connected with presser feet 24.Compress motor 43 is located at
The inside of column sections 3.Compress motor 43 is connected by the link mechanism for the inside for being set to horn portion 4 with the rear end of bar portion 25
Knot.It is rotated centered on axle portion 29 by bar portion 25 along with the driving of compress motor 43, so that presser feet 24 moves up and down.
Cloth 99 can be pressed between the presser feet 24 and cloth-feeding plate by presser feet 24.
As depicted in figs. 1 and 2, right wall portion 5A of the sewing machine 1 in top end part 5 has thread clamping mechanism 60.Thread clamping mechanism 60 has
There are clamp cylinder 62, tension seat 63, thread take-up spring 65, clamp motor 16, cable-clamping disc 69 and encoder 21 (referring to Fig. 4).Wire holding machine
Suture can be supplied between cable-clamping disc 69 and stitching 98 by structure 60 using the power of clamp motor 16.Clamp cylinder 62 is cyclic annular structure
Part is fixed on the inside of the through hole 5B of right wall portion 5A by fastening member.Tension seat 63 is annular component, is consolidated by screw 14
It is scheduled on the inside of clamp cylinder 62.Thread take-up spring 65 is fixed on the lateral surface of tension seat 63, is wound in tension seat 63 and clamp cylinder
Between 62.The one end of thread take-up spring 65 is exposed to the right from right wall portion 5A.Clamp motor 16 is bolted to horn
The inside in portion 4.Clamp motor 16 has output shaft 18, and output shaft 18 runs through the centre bore of tension seat 63, and is projected into and compares right wall
Portion 5A leans on the position of right.Output shaft 18 can be axially to be rotated with left and right directions, right of the right part in horn portion 4
The cable-clamping disc 69 is supported in such a way that cable-clamping disc 69 can rotate.In present embodiment, output shaft 18 directly connects with cable-clamping disc 69
Knot.Cable-clamping disc 69 is fixed on the right part of output shaft 18 by screw 28.Upper thread 6 is enclosed around cable-clamping disc 69 1 to two circles.
Clamp motor 16 assigns tension by rotating cable-clamping disc 69 by output shaft 18, to upper thread 6.Clamp motor 16 is
Two-phase bipolar pulse motor.Clamp motor 16 has multiple coils 33 (referring to Fig. 3).Multiple coils 33 turn along output shaft 18
Dynamic direction configuration.The number of the coil 33 of present embodiment is four.Sewing machine 1 can be to the two-way supply electric current of each coil 33.
Sewing machine 1 controls the rotation angle (rotation position) of output shaft 18 using electromagnetic force caused by the multiple coils 33 for having led to electricity.
Encoder 21 is used to detect the rotation angle of output shaft 18.Output shaft 18 left part and be to be fixed in the inside in horn portion 4
The code-disc of encoder 21.
Referring to Fig. 4, illustrate the electrical structure of sewing machine 1.The control device 30 of sewing machine 1 has CPU91.CPU91 can
Movement of the control comprising the sewing machine 1 including sewing mechanism 12 and clamp motor 16.CPU91 and ROM92, RAM93, storage device
94 are connected with I/O interface (hereinafter referred to as I/O) 45.ROM92 is stored with for executing aftermentioned sewing processing (referring to Fig. 8) etc.
The program etc. of various processing.RAM93 is for temporarily storing various values.Storage device 94 is non-volatile.Storage device 94 stores
There is the stitch data for forming stitching 98 in cloth 99.Storage device 94 is stored with aftermentioned first relational expression and the second relationship
Formula.
It is during sewing machine 1 sews a needle during sewing, is during the upper rotation of axis 15 is turned around.As shown in fig. 7, seam
Machine 1 of threading is thread take-up tension lever 51 since movable range upper end i.e. thread take-up tension lever top dead centre during sewing a needle, via under movable range
End be thread take-up tension lever lower dead center, during being again returned to until thread take-up tension lever top dead centre later, during this period with the rotation angle of upper axis 15
60 degree~420 degree of range institute comparable period is substantially uniform.T1 is to take off after 6 pile warp rotating shuttle 39 of upper thread during being detached from shuttle
It is that " upper thread disengaging shuttle " starts from shuttle, until thread take-up tension lever 51 lifts upper thread 6 to assign tension to upper thread 6
Period.T2 is during being captured using spur 36 to upper thread 6 during shuttle captures.T2 is from " shuttle during shuttle captures
During hooking upper thread " is until " upper thread disengaging shuttle ", wherein " shuttle hooking upper thread " is indicated along with spur 36 and eedle
Hooking of the spur 36 to upper thread 6 caused by 10 congregation.Spur 36 and eedle 10 congregation be spur 36 to pinprick 10A near
The opportunity that the ring of upper thread 6 is captured.H is during monitoring whether that bouncing pilotage has occurred during detection.Bouncing pilotage refers to following bad
Situation: the spur 36 of rotating shuttle 39 could not capture the ring of upper thread 6, so that stitching 98 can not be formed in cloth 99.Bouncing pilotage is sewing
Undesirable an example.H is located at rotating shuttle 39 i.e. and will unclamp before the ring of upper thread 6 during detection.H is from " shuttle during the detection of this example
During sub- hooking upper thread " is until shank top dead centre, exist during this period comprising thread take-up tension lever lower dead center and " upper thread disengaging shuttle "
It is interior.CPU91 is according to the rotation angle of the upper axis 15 of the testing result based on encoder 27A, to judge to be located at T1 during being detached from shuttle
In disengaging shuttle opportunity (the first opportunity), the shuttle that is located at during shuttle captures in T2 catches opportunity by the forelock (the second opportunity) and examines
H during survey.The shuttle of this example catches opportunity by the forelock to be in and lean on during " shuttle hooking upper thread " side in T3 than H during detection.
The first relational expression and the second relational expression are used when controlling the driving of clamp motor 16.First relational expression is will to flow to
The formula that the A phase current of A phase as the phase in clamp motor 16 associates with electric angle.Second relational expression is will to flow to work
The formula to associate for the B phase current of the B phase of another phase in clamp motor 16 with electric angle.As shown in figure 5, indicating A phase electricity
Phase is shown in the chart of stream and B phase current to offset one from another 90 degree of two sine curves.360 degree of the electric angle of present embodiment
It is equivalent to 7.2 degree of mechanical angle.CPU91 controls the driving of clamp motor 16, and the phase difference of output shaft 18 is made to reach target value.Output
The phase difference of axis 18 is the absolute value of the difference of the rotation angular phasing of the reference phase and output shaft 18 as benchmark of output shaft 18.
Sewing machine 1 is maintained regulation tension by the way that the phase difference of output shaft 18 is remained defined target value, by tension force of facial suture.
I/O45 is connected with 81~driving circuit of driving circuit 86.Driving circuit 81 is connected with main motor 27.Driving electricity
Road 82 is connected with rotary actuator 41.Driving circuit 83 is connected with mobile motor 42.Driving circuit 84 and 43 phase of compress motor
Connection.Rotary actuator 41, mobile motor 42 and compress motor 43 are impulse motor.Encoder is equipped in the output shaft of main motor 27
27A, is equipped with encoder 41A in the output shaft of rotary actuator 41, is equipped with encoder 42A in the output shaft of mobile motor 42, is pressing
The output shaft of cloth motor 43 is equipped with encoder 43A.Encoder 27A detects the rotation position of the output shaft of main motor 27, and through I/
O45 exports the rotation position to CPU91, and encoder 41A detects the rotation position of the output shaft of rotary actuator 41, and through I/O45
Export the rotation position to CPU91, encoder 42A detects the rotation position of the output shaft of mobile motor 42, and through I/O45 to
CPU91 exports the rotation position, and encoder 43A detects the rotation position of the output shaft of compress motor 43, and through I/O45 to
CPU91 exports the rotation position.CPU91 obtains the testing result of encoder 27A, and sends control signal to driving circuit 81,
CPU91 obtains the testing result of encoder 41A, and sends control signal to driving circuit 82, and CPU91 obtains encoder 42A's
Testing result, and control signal is sent to driving circuit 83, CPU91 obtains the testing result of encoder 43A, and to driving circuit
84 send control signal.Therefore, CPU91 can control main motor 27, rotary actuator 41, mobile motor 42 and compress motor 43
Driving.In the following, being referred to as drive motor when summarizing main motor 27, rotary actuator 41 and mobile motor 42.
Driving circuit 85 is connected with clamp motor 16.Encoder 21 is exported to CPU91 as testing result, clamp horse
Up to the rotation position of 16 output shaft 18.CPU91 is by sending control signal to driving circuit 85, to control clamp motor 16.
The control mode of clamp motor 16 will be described later.
Driving circuit 86 is connected with the display unit 48 in operation portion 46.CPU91 is controlled by sending to driving circuit 86
Signal, to show various information in display unit 48.Operating knob 47 in operation portion 46 is through I/O45 to detected by CPU91 output
Various information.Pedal 38 is through I/O45 to CPU91 output test result.Shown in the testing result of CPU91 acquisition pedal 38,
For the operation direction of pedal 38 and operating quantity.
Referring to Fig. 6 A~Fig. 6 D, illustrate the movement summary of sewing machine 1.Cloth 99 is placed in cloth-feeding plate and needle plate 26, benefit
Cloth 99 is pressed between the presser feet 24 and cloth-feeding plate with presser feet 24.Make main motor 27, mobile motor 42 and 41 phase of rotary actuator
Driven to mutually synchronization.Pressure arm 23 and cloth-feeding plate are moved forward and backward along with the driving of mobile motor 42, and along with pendulum
The driving of dynamic motor 41 reciprocally swinging in left-right direction.Therefore, cloth-feeding device 20 moves forward and backward cloth 99, and makes the cloth
99 reciprocally swinging in left-right direction of material.When the driving synchronous with mobile motor 42 and rotary actuator 41 of main motor 27, upper axis 15 into
Row rotation.Shank up-down mechanism, Yarn taking-up mechanism and rotating shuttle 39 are mutually linkedly driven.The machine declined together with shank 11
Needle 10 is through cloth 99 and passes through appearance pin hole.The upper thread 6 for having dropped to the vicinity pinprick 10A of the lower section of appearance pin hole is annular in shape
(Fig. 6 A).When by rotating shuttle 39 around main view rotationally clockwise, so that spur 36 captures upper thread 6 annular in shape.
Eedle 10 rises, and is detached from cloth 99 upwards, when rotating shuttle 39 continues around main view rotationally clockwise.Spur 36 is to rotation side
To upper thread 6 annular in shape is pulled, keep upper thread 6 annular in shape expanding (Fig. 6 B).When upper thread 6 annular in shape around rotating shuttle 39 and is detached from
When the rotating shuttle 39 (Fig. 6 C), upper thread 6 and 9 weave in of baseline.The rotation direction of rotating shuttle 39 is switched to inverse time when main view
Needle direction, thread take-up tension lever 51 will lift (Fig. 6 D) with the upper thread 6 of 9 weave in of baseline.6 undergauge of upper thread annular in shape, in this way, seam
Machine 1 of threading has sewed a needle.Upper axis 15 is often rotated by 360 °, and sewing machine 1 is carried out needle sewing.Sewing machine 1 is above-mentioned dynamic by repeating
Make, forms stitching 98 in cloth 99.
Referring to Fig. 8, illustrate that sewing is handled.Sewing processing is the processing that sewing machine 1 sews cloth 99.Work as operator
Operating knob 47 is operated, when starting to power to sewing machine 1, CPU91 reads program from ROM92 to RAM93, executes sewing processing.
CPU91 executes initialization process (S1).CPU91 reads in various setting values from storage device 94 to RAM93.CPU91
Based on the testing result of encoder 21, the rotation angle (S2) of the output shaft 18 of clamp motor 16 is obtained.The rotation angle is initial shape
State, output shaft 18 reference phase, is stored in RAM93.CPU91 obtains the first movement amount inputted using operating knob 47
With the second amount of movement (S3).First movement amount is to make to be fed into lean on the upper thread 6 of 51 side of thread take-up tension lever to withdrawal than thread clamping mechanism 60
The mobile amount in direction.It withdraws direction and refers to the direction for leaning on upper thread supply source (such as spool) side than thread clamping mechanism 60.It is being detached from shuttle
Period of the day from 11 p.m. to 1 a.m machine (the first opportunity), cable-clamping disc 69 are revolved to reversed (counter clockwise direction of right apparent time) of direction of rotation when supplying upper thread 6
Turn, makes the mobile first movement amount of upper thread 6.Second amount of movement is to make to be fed into the upper thread that 51 side of thread take-up tension lever is leaned on than thread clamping mechanism 60
6 amounts mobile to withdrawal direction.It catches opportunity by the forelock (the second opportunity) in shuttle, cable-clamping disc 69 moves upper thread 6 to above-mentioned reverse rotation
Dynamic second amount of movement.First movement amount and the second amount of movement are either indicate upper thread 6 to the exhausted of the length for withdrawing direction movement
To amount, it is also possible to indicate the relative quantity of the length.Specific value is inputted by operation operating knob 47 as the in operator
When one amount of movement, CPU91 obtains inputted first movement amount.Specific value is inputted by operation operating knob 47 in operator
When as the second amount of movement, CPU91 obtains the second inputted amount of movement.It is also possible to CPU91 and obtains specified value as first
Amount of movement and the second amount of movement.The value of first rotation amount and the second rotation amount both may be the same or different.
CPU91 obtains target value (S4) corresponding with regulation tension.It is turned round caused by tension force of facial suture and clamp motor 16
Square has correlativity.Target value is the value of the tension force of facial suture calculated based on the correlativity stored in storage device 94
The phase difference of output shaft 18 when reaching regulation tension.Tension is provided either the value inputted by operator, is also possible to advise
Definite value.CPU91 according to the correlativity between the amount of movement of upper thread 6 and the rotation amount of the output shaft 18 of clamp motor 16, according to
The first movement amount obtained in S3 and the second amount of movement, to calculate the first rotation amount and the second rotation amount (S5).First rotation
Amount is the rotation amount of the confidential reverse rotation when being detached from shuttle of output shaft 18.Second rotation amount is that output shaft 18 is captured in shuttle
When confidential reverse rotation rotation amount.
CPU91 to whether detect sewing machine 1 sewing start instruction judged (S6).Operation behaviour is passed through by operator
Make button 47 or pedal 38 starts to indicate to input sewing.CPU91 before detecting that sewing starts instruction, in standby mode (S6:
It is no).In standby, cloth 99 is placed in needle plate 26 and cloth-feeding plate by operator.After cloth 99 has been loaded, by
Operator inputs sewing and starts when instruction (S6: yes), and CPU91 controls the driving of compress motor 43, and presser feet 24 is made to decline (S7).Pressure
Cloth 99 is clipped between the presser feet 24 and cloth-feeding plate by foot 24.CPU91 determines the respective corresponding energization of multiple coils 33 respectively
Type, and it is powered (S8).Energization type includes A phase current and B phase current.CPU91 is based on the first relational expression, the second relationship
Formula, the rotation angle of the output shaft 18 obtained in S2 and the target value calculated in S4, to determine energization type.
CPU91 controls the driving of drive motor, forms stitching 98 (S10) in cloth 99.Shank 11, rotating shuttle 39 and cloth pushing table
37 are acted with being mutually in step.Whether CPU91 is according to the output valve of encoder 27A, to being to judge on the first opportunity
(S11).When CPU91 was judged as YES for the first opportunity (S11: yes), CPU91 controls driving circuit 85, makes the defeated of clamp motor 16
Shaft 18 is rotated in the first rotation amount (S12) calculated in S5 to reversed (counter clockwise direction of right apparent time).CPU91 is always
The driving for controlling clamp motor 16, until the rotation amount of 18 reverse rotation of output shaft of clamp motor 16 reaches the first rotation
Amount.When it was the first opportunity that CPU91, which is judged as not, (S11: no), whether CPU91 is according to the output valve of encoder 27A, to being
Two opportunitys were judged (S13).When CPU91 was judged as YES for the second opportunity (S13: yes), CPU91 controls driving circuit 85, makes
The second rotation amount (S14) that 18 reverse rotation of output shaft of clamp motor 16 is calculated in S5.CPU91 controls always folder
The driving of line motor 16, until the rotation amount of 18 reverse rotation of output shaft of clamp motor 16 reaches the second rotation amount.In S12
Or after S14, CPU91 carries out aftermentioned S22.
When it was the second opportunity that CPU91, which is judged as not, (S13: no), CPU91 executes usually processing (S15).Usually handling is
The processing controlled in a manner of making tension force of facial suture reach regulation tension.As shown in figure 9, CPU91 obtains clamp motor 16
The rotation angle (S31) of output shaft 18.CPU91 is judged (S32) to whether fiducial value is greater than threshold value.Fiducial value is output shaft 18
Phase difference subtract the value obtained after target value.CPU91 uses the rotation angle of the output shaft 18 obtained in S31, obtains in S4
The reference phase stored in the target value and RAM93 taken, to calculate fiducial value.Threshold value determines according to target value, and is big
In 0 numerical value.When sewing machine 1 starts sewing movement, phase difference is theoretically 0 (S32: no).In this case, CPU91 is tied
Shu Tongchang processing, and make processing returns into Fig. 8 sewing processing.
After the usual processing (S15) of stipulated number is begun to pass through from sewing processing, fiducial value become larger than threshold value (S32:
It is).In this case, tension force of facial suture is greater than regulation tension corresponding with the target value obtained in S4.CPU91 determines multiple
The respective corresponding energization type (S33) of coil 33.CPU91 is based on the first relational expression, the second relational expression and obtains in S31
Output shaft 18 rotation angle, determine the energization type (S33) of the difference of the phase difference that can eliminate output shaft 18 and target value.
CPU91 is switched to the energization type (S34) decided in S33 for the energization type that multiple coils 33 execute is being directed to.
Output shaft 18 rotates, and tension force of facial suture is restored to regulation tension corresponding with the target value obtained in S4.At this point, CPU91 will
The rotation angle of postrotational output shaft 18 is rewritten in RAM93 as reference phase.CPU91 terminates usually to handle.
When CPU91 executes S33 every time, the output valve of encoder 21 is all based on to determine energization type (S33), and switch multiple coils 33
Energization type (S34).S15 is repeated by CPU91, so that tension force of facial suture is maintained and obtains in S4 by sewing machine 1
The corresponding regulation tension of target value.
CPU91 according to the output valve of encoder 27A, to whether be detection during H judged (S16).Judge in CPU91
When not to be H during detecting (S16: no), CPU91 carries out aftermentioned S22.CPU91 be judged as YES detection during H when (S16:
It is), CPU91 obtains the output valve of encoder 21, as output valve (S17) corresponding with the shuttle pulling amount of upper thread 6.Shuttle is drawn
The amount for dragging upper thread is the amount for pulling upper thread 6 because of rotating shuttle 39 to keep upper thread 6 mobile to the direction of the supply.CPU91 is obtained according in S17
The output valve taken, to whether bouncing pilotage has occurred being judged (S18).H includes pulling upper thread 6 because of rotating shuttle 39 to make during detection
During upper thread 6 is moved to the direction of the supply.The amount that cable-clamping disc 69 pulls upper thread 6 with shuttle is correspondingly rotated.CPU91 according to
Whether the shuttle of the output valve based on encoder 21 during detection in H pulls the amount of upper thread, come to bouncing pilotage has occurred examining
It surveys.As shown in the legend V4 of the lower part in Fig. 7, when rotating shuttle 39 does not pull upper thread 6, upper thread supply amount is during the test in H
It is constant.Therefore, output valve of the CPU91 based on encoder 21 is detected as that bouncing pilotage (S18: yes) has occurred.In this case, CPU91
Wrong (S19) has occurred in notice.CPU91 controls driving circuit 86, for example, showing that " detecting bouncing pilotage " is such in display unit 48
Content.CPU91 to whether make drive motor driving stop judged (S20).CPU91 and it is stored in advance in storage device 94
In setting content correspondingly execute the judgement.When CPU91, which is judged as, stops the driving of drive motor (S20: no),
CPU91 carries out aftermentioned S22.When CPU91 is judged as the driving stopping of drive motor to be made (S20: yes), CPU91 makes to drive
The driving of motor stops (S21), terminates sewing processing.
As shown in the legend V3 of the lower part in Fig. 7, when CPU91 is judged as in H during the test the supply for having upper thread 6,
CPU91 is detected as that bouncing pilotage (S18: no) does not occur.In this case, testing result of the CPU91 based on operating knob 47, to whether examining
The sewing finishing instruction for measuring sewing machine 1 is judged (S22).Sewing finishing instruction indicates the operation by operator to pedal 38
Stop, or the sewing finishing based on stitch data.When sewing finishing instruction is not detected in CPU91, CPU91 continues to sew
It acts (S22: no).When CPU91 detects sewing finishing instruction (S22: yes), CPU91 stops the driving of drive motor
(S23).Shank 11, rotating shuttle 39 and the stopping of cloth pushing table 37 are acted.CPU91 controls the driving of compress motor 43, makes presser feet 24
Rise (S24), later, terminates sewing processing.Cloth 99 can be taken off from sewing machine 1.
In above embodiment, sewing mechanism 12 is an example of sewing unit of the invention, and clamp motor 16 is of the invention
An example of driving portion (motor), rotating shuttle 39 are an examples of shuttle of the invention, and encoder 21 is an example of test section of the invention,
Control device 30 is an example of control unit of the invention.Operating knob 47 is the one of the first input unit and the second input unit of the invention
Example.CPU91 when executing S10 is an example of sewing control unit of the invention.CPU91 when executing S12, S14 is of the invention
An example of clamp control unit.CPU91 when executing S3, S5 is an example of the first acquisition unit of the invention.When execution S17
CPU91 is an example of output valve acquisition unit of the invention.CPU91 when executing S18 is an example of judging part of the invention.It executes
CPU91 when S3, S5 is an example of the second acquisition unit of the invention.
The sewing machine 1 of above embodiment during sewing, can control the driving of clamp motor 16 to control upper thread 6
Supply, thus make to be fed into than thread clamping mechanism 60 by 51 side of thread take-up tension lever reverse movement from upper thread 6 to the direction of the supply (S12,
S14).Sewing machine 1 can assign tension appropriate to upper thread 6 when thread take-up tension lever 51 lifts upper thread 6 by keeping upper thread 6 mobile,
To which reliably required tension can be assigned to upper thread 6 compared with existing sewing machine.Therefore, compared with existing sewing machine, seam
Machine 1 of threading can be such that stitching when sewing stabilizes, so as to inhibit stitching defect.
The output shaft 18 of clamp motor 16 supports the cable-clamping disc 69 in such a way that cable-clamping disc 69 can rotate.CPU91 is being controlled
During the driving of sewing mechanism 12 processed, control clamp motor 16 driving, make 69 reverse rotation of cable-clamping disc (S12,
S14).Sewing machine 1 can make 69 reverse rotation of cable-clamping disc, to make to be fed by the driving of control clamp motor 16
It is more mobile by the direction of the side to where leaning on upper thread supply source than cable-clamping disc 69 of upper thread 6 of 51 side of thread take-up tension lever than cable-clamping disc 69.
Sewing machine 1 controls the driving (S12) of clamp motor 16 during being detached from shuttle in T1.In detail, sewing machine 1 exists
Set on the disengaging shuttle opportunity being detached from during shuttle in T1, the driving of clamp motor 16 is controlled, moves upper thread 6 to direction is withdrawn
It is dynamic.Sewing machine 1 in T1, makes the upper thread 6 being excessively supplied between cable-clamping disc 69 and stitching 98 to receipts during being detached from shuttle
It is mobile to go back to direction.Therefore, sewing machine 1 can assign tension appropriate to upper thread 6 when thread take-up tension lever 51 lifts upper thread 6, thus
Be able to suppress it is insufficient because of tension force of facial suture in sewing caused by stitching defect.
CPU91 obtains the first rotation amount (S3, S5) according to the first movement amount inputted using operating knob 47.CPU91
During being detached from shuttle in T1, the driving of clamp motor 16 is controlled, calculates 69 reverse rotation of cable-clamping disc in S5
First rotation amount (S12).In the case where existing sewing machine, when line tension is adjusted over there, be by operator intuitively Lai
Adjust thread take-up spring.In the case where sewing machine 1, when line tension is adjusted over there, the change for adjusting tension force of facial suture can be made
Measure (the first rotation amount) numeralization.Therefore, compared with existing sewing machine, sewing machine 1 be can be improved during being detached from shuttle in T1
The repeatability of tension force of facial suture is adjusted, it is compared with the past for operator, it can simply adjust tension force of facial suture.
Sewing machine 1 since the ring congregation spur 36 of spur 36 and upper thread 6 captures the ring of upper thread 6, up to
During shuttle until the ring disengaging rotating shuttle 39 of the upper thread 6 captured by spur 36 captures in T2, the drive of clamp motor 16 is controlled
It is dynamic, make 69 reverse rotation of cable-clamping disc.Sewing machine 1 can assign required tension to upper thread 6 in T2 during shuttle captures.
Sewing machine 1 has encoder 21.Encoder 21 can export and shifting of the upper thread 6 to the direction of the supply to control device 30
Momentum, that is, corresponding the output valve of upper thread supply amount.CPU91 controls the driving of clamp motor 16 during shuttle captures in T2, make to press from both sides
69 reverse rotation of drum obtains output valve (S17) corresponding with the upper thread supply amount in H during detection later.During detection
The ring that H is located at the upper thread 6 captured by spur 36 is detached from before rotating shuttle 39.CPU91 is corresponding to the output valve obtained in S17
Ground, to whether bouncing pilotage has occurred being judged (S18).Compared with existing sewing machine, sewing machine 1 can be accurately in the detection phase
Between bouncing pilotage whether have occurred in H judged.In the case where existing sewing machine, clamp horse is not controlled in T2 during shuttle captures
Driving up to 16 makes 69 reverse rotation of cable-clamping disc.Therefore, upper thread supply amount under normal conditions is, for example, the lower part in Fig. 7
Shown in legend V1, occur bouncing pilotage when upper thread supply amount be Fig. 7 in lower part shown in legend V2.The legend V3 of sewing machine 1
Upper thread during detection of the difference of upper thread supply amount during detection with legend V4 in H greater than legend V1 and legend V2 in H supplies
To the difference of amount.Therefore, compared with existing sewing machine, sewing machine 1 can be based on the upper thread supply amount in H during detection, accurately
Judge whether that bouncing pilotage has occurred.
Sewing machine 1 has operating knob 47.Upper thread 6 can be made to receipts in T2 during shuttle captures using the input of operating knob 47
Return mobile amount i.e. the second amount of movement in direction.CPU91 obtains second according to the second amount of movement inputted using operating knob 47
Rotation amount (S3, S5).CPU91 in T2, controls the driving of clamp motor 16 during shuttle captures, and makes cable-clamping disc 69 to reversed rotation
Turn the second rotation amount (S14).In the case where existing sewing machine, when line tension is adjusted over there, be by operator intuitively
To adjust thread take-up spring.In the case where sewing machine 1, when line tension is adjusted over there, it can make to adjust tension force of facial suture
Variable (the second rotation amount) numeralization.Therefore, compared with existing sewing machine, sewing machine 1 can be improved the T2 during shuttle captures
In adjust tension force of facial suture repeatability, it is compared with the past for operator, can simply adjust tension force of facial suture.
The present invention is not limited to the above embodiments.Sewing machine, can also be with either sewing machine for covering chain stitch, button holing sewing machine etc.
It is domestic sewing machine or embroidery machine.Sewing machine is also possible to the sewing machine that shuttle mechanism is omitted in ring seam sewing machine etc..Folder
Line mechanism is also possible to the mechanism that can release successively upper thread.The mechanism is also possible to for example to release successively upper thread
When control tension known mechanism.Withdrawing direction can correspondingly change with the structure of thread clamping mechanism.Driving portion and clamp
The structure of mechanism is corresponding, and driving portion is also possible to the motor of three-phase or more either single-phase motor, can also be DC (direct current)
The various electric notors such as motor, core free motor, solenoid valve, cylinder etc..Sewing machine can be omitted the first input unit, the second input unit.
First input unit, the second input unit are also possible to the other structures such as dial-type input unit, touch tablet.It is also possible in addition to can
Except the encoder for detecting the rotation angle of the output shaft of clamp motor, sewing machine also has to export to control unit to be supplied with upper thread
To the test section for measuring corresponding output valve.
As long as the program for executing the sewing processing in Fig. 8 stores depositing to sewing machine before sewing machine executes program
Store up equipment.The acquisition methods of program, to acquisite approachs, the equipment for storing program can be changed appropriately respectively.
It is also possible to sewing machine by cable or wireless communication, receives processor program to be executed from other devices, and by the journey
Sequence is stored to storage equipment.Other devices are for example including computer and the server being attached by network.It is also possible to stitch
The storage equipment of machine of threading is that HDD, SSD etc. store equipment.
Each step in sewing processing in Fig. 8 is not limited to be performed example by CPU91, is also possible to by other electricity
Sub- equipment (such as ASIC) Lai Zhihang a portion processing or all processing.Be also possible to each step in above-mentioned processing by
Multiple electronic equipment (such as multiple CPU) Lai Jinhang distributed treatments.Each step in sewing processing for the above embodiment
Suddenly, can be as needed, change sequence omits step, additional step.Being also possible to the present invention is following such embodiment party
It according to the instruction of the control unit from sewing machine, is executed in actual treatment by OS for being run on the specified device of position etc. likes:
Part or all of processing, thus realize the function of above embodiment.
Sewing machine can not execute usual processing, but directly adjust tension force of facial suture using thread take-up spring.Sewing machine can
To omit S17, S18.It can be suitably changed during the detection of S16.Be also possible to sewing machine detect bouncing pilotage has occurred when
(S18: yes) continues the driving of drive motor.The notification method of S19 and the structure of notification unit are corresponding, can also pass through sound
Sound output etc..As long as sewing machine in period, controls driving portion during shuttle captures and at least one of during disengaging shuttle
Driving control the supply of upper thread, keep the upper thread mobile to direction is withdrawn.It is also possible to sewing machine during shuttle captures
In period at least one of during disengaging shuttle, on more than two opportunitys, the driving of driving portion is controlled to control upper thread
Supply, keep upper thread mobile to direction is withdrawn.
Claims (7)
1. a kind of sewing machine, which is included
Sewing unit (12), the sewing unit have shank (11) and thread take-up tension lever (51), which is equipped with eedle (10), and the shank
It can move up and down, the up and down motion of the thread take-up tension lever and the shank is synchronously carried out up and down motion, and can mention upper thread (6)
It rises, which can form stitching (98) in cloth (99) using the eedle；
Thread clamping mechanism (60) can assign tension to the upper thread；
Driving portion is used to drive the thread clamping mechanism；And
Control unit (30), is used to control the driving of the sewing unit and the driving portion,
The sewing machine is characterized in that,
The control unit is functioned as sewing control unit and clamp control unit,
The sewing control unit is used to control the driving of the sewing unit, forms the stitching in the cloth,
The clamp control unit is used for during controlling the driving of the sewing unit by the sewing control unit, and is from institute
When stating shank and being located at the lower dead center of up and down motion range, until the thread take-up tension lever is located at the top dead centre of up and down motion range
Until during in, control the driving of the driving portion, keep the upper thread mobile to the withdrawal direction opposite with the direction of the supply.
2. sewing machine according to claim 1, which is characterized in that
The sewing machine has cable-clamping disc (69), is wound with the upper thread in the cable-clamping disc,
The driving portion is motor (16), which has output shaft (18), which can be rotated with the cable-clamping disc
Mode supports the cable-clamping disc,
The sewing machine also has encoder (21), which is able to detect the rotation angle of the output shaft,
The clamp control unit controls the motor during sewing control unit controls the driving of the sewing unit
Driving makes the cable-clamping disc to the reverse rotation for the direction of rotation for supplying the upper thread.
3. sewing machine according to claim 2, which is characterized in that
The sewing machine has shuttle mechanism (40), which has shuttle (39), which has spur (36), Neng Gouli
It is captured with ring of the spur to the upper thread through the eedle, which makes the shuttle and the eedle
Up and down motion mutually linkedly rotated,
The clamp control unit when the shuttle mechanism rotates the shuttle, and be during being detached from shuttle in, control
The driving of the motor is made, refers to during the disengaging shuttle from the ring of the upper thread captured by the spur and is detached from the shuttle
Son starts, during until being lifted the upper thread by the thread take-up tension lever to apply tension to the upper thread.
4. sewing machine according to claim 3, which is characterized in that
The sewing machine also has the first input unit (47), can input first movement amount using first input unit, first shifting
Momentum be the clamp control unit during the disengaging shuttle in, make the amount that the upper thread is mobile to the withdrawal direction,
The control unit is also used as the first acquisition unit to function, which is based on defeated using the first input unit institute
The first movement amount entered, the driving that acquisition will control the motor make first rotation of the cable-clamping disc to the reverse rotation
Turn amount,
In the clamp control unit is during the disengaging shuttle, the driving of the motor is controlled, makes the cable-clamping disc to described
Reversely rotate first rotation amount.
5. sewing machine according to claim 3 or 4, which is characterized in that
The clamp control unit when the shuttle mechanism rotates the shuttle, and be shuttle capture during in, control
The driving for making the motor, makes the cable-clamping disc to the reverse rotation, which refers to during capturing from the spur and institute
The ring spur that merges for stating upper thread capture to the ring of the upper thread and starts, until described in being captured by the spur
During the ring of upper thread is detached from until the shuttle.
6. sewing machine according to claim 5, which is characterized in that
The sewing machine also has test section (21), which can export with the upper thread to the control unit to the supply
Supply amount, that is, corresponding output valve of upper thread supply amount of direction supply,
The control unit is also used as output valve acquisition unit and judging part to function,
In the clamp control unit is during the shuttle captures, the driving of the motor is controlled, makes the cable-clamping disc to described
Reversely rotate, later, which obtains, the ring of the upper thread captured by the spur be detached from the shuttle it
Before during in the output valve corresponding with the upper thread supply amount,
The output valve acquired in the judging part and the output valve acquisition unit correspondingly, to whether the shuttle have occurred not having
The bouncing pilotage that the ring of the upper thread can be captured is judged.
7. sewing machine according to claim 6, which is characterized in that
The sewing machine also has the second input unit (47), can input the second amount of movement using second input unit, second shifting
In momentum is the clamp control unit during the shuttle captures, make the amount that the upper thread is mobile to the withdrawal direction,
The control unit is also used as the second acquisition unit to function, which is based on defeated using the second input unit institute
Second amount of movement entered, the driving that acquisition will control the motor make second rotation of the cable-clamping disc to the reverse rotation
Turn amount,
In the clamp control unit is during the shuttle captures, the driving of the motor is controlled, makes the cable-clamping disc to described
Reversely rotate second rotation amount.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018056123A JP2019166039A (en) | 2018-03-23 | 2018-03-23 | sewing machine |
| JP2018-056123 | 2018-03-23 |
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| Publication Number | Publication Date |
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| CN110295463A true CN110295463A (en) | 2019-10-01 |
| CN110295463B CN110295463B (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910224032.2A Active CN110295463B (en) | 2018-03-23 | 2019-03-22 | Sewing machine |
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| CN (1) | CN110295463B (en) |
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| CN113463290A (en) * | 2020-03-30 | 2021-10-01 | 兄弟工业株式会社 | Failure determination device |
| CN113463291A (en) * | 2020-03-31 | 2021-10-01 | 兄弟工业株式会社 | Failure prediction device |
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| EP0265267B1 (en) * | 1986-10-22 | 1991-05-22 | Brother Kogyo Kabushiki Kaisha | Automatic needle thread supply control system |
| CN1456730A (en) * | 2002-05-10 | 2003-11-19 | 大和缝纫机制造株式会社 | Thread tension device of sewing machine |
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| CN113463291A (en) * | 2020-03-31 | 2021-10-01 | 兄弟工业株式会社 | Failure prediction device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110295463B (en) | 2021-07-20 |
| JP2019166039A (en) | 2019-10-03 |
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