CN110295462A - Sewing machine - Google Patents
Sewing machine Download PDFInfo
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- CN110295462A CN110295462A CN201910223998.4A CN201910223998A CN110295462A CN 110295462 A CN110295462 A CN 110295462A CN 201910223998 A CN201910223998 A CN 201910223998A CN 110295462 A CN110295462 A CN 110295462A
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- Prior art keywords
- driving
- cable
- suture
- sewing
- clamping disc
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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
The present invention relates to a kind of sewing machine, which can reduce the situation of the suture surplus unevenness after cutting off suture using thread cutter, can prevent that stitching defect occurs when starting sewing next time.Sewing machine has supply unit.Supply unit has driver, and supply unit can utilize the power of driver, suture is supplied between cable-clamping disc and stitching.The control unit of sewing machine forms stitching in cloth by the driving of control sewing unit.Control unit starts the driving for controlling thread cutter before stopping the driving for controlling sewing unit.Control unit controls the driving of supply unit, the suture of specified amount is supplied between cable-clamping disc and stitching on the same opportunity of the driving of control thread cutter.Control unit stops the driving for controlling sewing unit after suture is supplied between cable-clamping disc and stitching by the driving of control supply unit.
Description
Technical field
The present invention relates to a kind of sewing machines.
Background technique
The sewing machine of tension force of facial suture when sewing can be controlled there is known one kind.For example, Japanese Unexamined Patent Publication 1997
Sewing machine disclosed in No. 220391 bulletins has line wheel, hysteresis brake and motor.Hysteresis brake has output shaft.Line wheel
It is fixed on hysteresis brake.Line wheel is wound with upper thread.Tension force of facial suture is input to sewing machine by operator.When motor driving,
Sewing machine executes sewing movement.In motor driving, the amount of movement of upper thread pile warp line wheel, line wheel and upper thread is correspondingly revolved
Turn.Electric current is supplied to hysteresis brake by sewing machine, to generate brake force for the line wheel movement to be rotated.Hysteresis brake
The braking torque of device applies the tension of the extraction direction for upper thread.The electric current that sewing machine is supplied by control to hysteresis brake
Braking torque is controlled, controlling tension force of facial suture.
Above-mentioned sewing machine cuts off upper thread in sewing finishing.In this case, remain on the face of eedle after the cut
When line surplus is more, when starting sewing next time, upper thread is possible to knot in the lower section of cloth agglomerating.It remains after the cut
When the upper thread surplus of eedle is fewer, when starting sewing next time, upper thread is possible to deviate from from eedle.Above-mentioned sewing machine is being wanted
It will do it control when upper thread is cut off, to reduce the braking torque of hysteresis brake, thus to reduce tension force of facial suture.After being cut off
The surplus for remaining on the upper thread of eedle is determined by following each tension: being carried out along with the braking torque to hysteresis brake
Tension caused by controlling;The tension assigned by the pre-tensioning device of sewing machine;And along with the packet when cutting off upper thread
It is including resistance on feed path containing upper thread, be applied to tension caused by the resistance of upper thread because of the movement of thread cutter.
The tension is relatively low, it is possible to unstable.For example, upper thread is being cut when cutting off upper thread in spastic situation
Just break before disconnected, or has deviate from after the cut from eedle.When upper thread is cut off in hypotensive situation, line wheel
It dallies, excessive upper thread is made to be wound in line wheel.Therefore, the surplus that the upper thread of eedle is remained on after cutting is uneven, is opening
Begin to be likely to occur stitching defect when sewing next time.
Summary of the invention
The object of the present invention is to provide a kind of sewing machine, the sewing machine can reduce using thread cutter by suture
The situation of suture surplus unevenness after cutting can prevent that stitching defect occurs when starting sewing next time.
The sewing machine of technical solution 1 includes sewing unit, and with shank, which is equipped with eedle, and the shank can
It moves up and down, which can form stitching in cloth using the eedle;Cable-clamping disc is wound with suture in the cable-clamping disc;
Thread cutter can cut off the suture in the lower section of the shank;And control unit, be used to control the sewing unit and
The driving of the thread cutter, the sewing machine it is characterized in that, the sewing machine have supply unit, the supply unit have driving
Device, the supply unit can utilize the power of the driver, the suture are supplied between the cable-clamping disc and the stitching,
The control unit is functioned as sewing control unit, tangent control portion, supply control part and stop control unit, sewing control
Portion is used to control the driving of the sewing unit, forms the stitching in the cloth, and the tangent control portion is for making described in control
The driving of thread cutter starts, and the supply control part is for being controlled the driving of the thread cutter by the tangent control portion
Same opportunity controls the driving of the supply unit, and the suture of specified amount is supplied to the cable-clamping disc and the stitching
Between, which is used to that the suture to be supplied to institute in the driving for controlling the supply unit by the supply control part
After stating between cable-clamping disc and the stitching, stop the driving of the sewing unit by the sewing control unit control.At this
In the case of, sewing machine controls the driving of supply unit on the same opportunity of the driving of control thread cutter, and the suture of specified amount is supplied
It is given between cable-clamping disc and stitching.The suture of thread tension when being cut off suture using thread cutter because of the specified amount supplied
It becomes stable.Therefore, sewing machine can reduce the situation of the suture surplus unevenness after cutting off suture using thread cutter, energy
It enough prevents that stitching defect occurs when starting sewing next time.
It is also possible in the sewing machine of technical solution 2, the driver is motor, which has output shaft, the output
Axis supports the cable-clamping disc in such a way that the cable-clamping disc can rotate, and the motor is by making the clamp by the output shaft
Disk rotation, to assign tension to the suture, the supply control part is controlling the tangent line dress by the tangent control portion
On the same opportunity for the driving set, the driving of the motor is controlled, turns the cable-clamping disc to the direction of the supply of the suture
It is dynamic, the suture of the specified amount is supplied between the cable-clamping disc and the stitching.In this case, sewing machine can
Cable-clamping disc is rotated by controlling the driving of motor, the suture of specified amount is supplied between cable-clamping disc and stitching.Due to driving
Dynamic device is motor, and therefore, the suture of specified amount can be relatively accurately supplied between cable-clamping disc and stitching by sewing machine.Opposite joint
Thread for machine, with by supply unit compared with the situation near the feed path that suture is set in such a way that cable-clamping disc is mutually independent,
The structure near feed path can be made relatively simple.
The sewing machine for being also possible to technical solution 3 also has input unit, which is used to input will be to the cable-clamping disc
The specified amount supplied between the stitching, the control unit can also play function as line amount acquisition unit and calculation part
Can, the line amount acquisition unit is for obtaining the specified amount that the input unit is inputted, and the calculation part is for the opposite clamp
The motor needed for supplying the suture of the specified amount acquired in the line amount acquisition unit between disk and the stitching
The rotation amount of the output shaft calculated, the supply control part is controlling the described same of the driving of the thread cutter
Opportunity controls the driving of the motor, and the output shaft is made to rotate the rotation amount calculated by the calculation part.At this
In the case of, the suture for the specified amount that input unit is inputted can be supplied between cable-clamping disc and stitching by sewing machine.Operator's energy
It is enough to set optimal specified amount on the basis of considering sewing condition.
It is also possible in the sewing machine of technical solution 4, the supply control part is controlling the driving of the thread cutter
The same opportunity, and be that the suture of the specified amount is supplied to the cable-clamping disc before by suture cutting
Between the stitching.In this case, sewing machine can be on the same opportunity of the driving of control thread cutter, and is that will stitch
Before line cutting, the suture of specified amount is supplied between cable-clamping disc and stitching.For sewing machine, compared in control tangent line
Same opportunity of the driving of device and be that the suture of specified amount is supplied between cable-clamping disc and stitching after suture is cut off
The case where, the suture of supplied specified amount can be utilized, the suture when cutting off suture using thread cutter is reliably made
Tension stability.
Detailed description of the invention
Fig. 1 is the perspective view of sewing machine 1.
Fig. 2 is supplied with the cross-sectional view of 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 curve.
Fig. 8 is the flow chart of sewing processing.
Fig. 9 is the flow chart of clamp motor driving processing.
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
Sub- driving mechanism and cloth-feeding device 20.Main motor 27 is supported in the rear portion in horn portion 4.Inside edge of the upper axis 15 in horn portion 4
Front-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 master
It is rotated under the driving of motor 27.The front end and rear end of upper axis 15 are each other on the same axis.Upper axis 15 is in rear end
Nearby 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 column sections 3
Portion 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 feed 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 drive mechanism is set to the inside in base portion 2, with lower axle and rotating shuttle 39.Lower axle is in base main part 7
Internal and tubular base portion 8 inside extends along the longitudinal direction, and can rotate.Lower axle is connected by linking part and connecting rod,
The 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 feed mechanism 60.Feed 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).Supply 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.
As shown in figure 4, sewing machine 1 has thread cutter 59, which can be in the lower section of shank 11 by suture
Cutting.Thread cutter 59 is well-known device, is in the top of shuttle drive mechanism and is the appearance needle in needle plate 26
Near hole.Thread cutter 59 has cutter 58 and electromagnetic component 57.Cutter 58 can be moved under the driving of electromagnetic component 57
Make, upper thread 6 and baseline 9 are cut off.Electromagnetic component 57 can be driven using the input of tangent line signal as opportunity.
Referring to Fig. 4, illustrate the electrical structure of sewing machine 1.The control device 30 of sewing machine 1 has CPU91.CPU91 control
Movement comprising the sewing machine 1 including sewing mechanism 12 and thread cutter 59.CPU91 and ROM92, RAM93, storage device 94 and
I/O interface (hereinafter referred to as I/O) 45 is connected.ROM92 is stored with various for executing aftermentioned sewing processing (referring to Fig. 8) etc.
The program etc. of processing.RAM93 is for temporarily storing various values.Storage device 94 is non-volatile.Storage device 94 stores useful
In the stitch data for forming stitching 98 in cloth 99.Storage device 94 is stored with aftermentioned first relational expression and the second relational expression.
Tangent line opportunity is in order to which upper thread 6 and baseline 9 are cut off the opportunity for driving electromagnetic component 57 in sewing finishing.Seam
It is during sewing machine 1 sews a needle during system, is during the upper rotation of axis 15 is turned around.As shown in fig. 7, sewing machine 1 sews
It is thread take-up tension lever 51 during one needle since movable range upper end, that is, thread take-up tension lever top dead centre, via movable range lower end, that is, 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 60 degree~420 degree of the rotation angle of upper axis 15
Range institute's comparable period it is substantially uniform.L1 and thread take-up tension lever lift the phase during including shuttle capture during the sewing of sewing machine 1
Between L2.L1 is during being captured using spur 36 to upper thread 6 during shuttle captures.L1 is sewing a needle during shuttle captures
During in exist it is primary.During L1 is until from " shuttle hooking upper thread " to " upper thread disengaging shuttle " during shuttle captures,
Wherein, " shuttle hooking upper thread " indicate use 36 hooking upper thread 6 of spur, " upper thread disengaging shuttle " refer to 6 pile warp rotating shuttle 39 of upper thread it
After be detached from the rotating shuttle 39.Thread take-up tension lever lift period L2 and be with " upper thread disengaging shuttle " starting point, using thread take-up tension lever 51 by upper thread 6
During lifting.It is until " upper thread disengaging shuttle " to thread take-up tension lever 51 reaches thread take-up tension lever top dead centre that thread take-up tension lever, which lifts period L2,
Period.Upper thread supply amount during sewing in thread take-up tension lever lift and increased in period L2.CPU91 is according to based on encoder
The rotation angle of the upper axis 15 of the testing result of 27A, come respectively to during tangent line opportunity, sewing, shuttle capture during L1, thread take-up tension lever
Lift period L2 to be judged.
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 the tension of upper thread 6.
I/O45 is connected with 81~driving circuit of driving circuit 86, electromagnetic component 57.Driving circuit 81 and main 27 phase of motor
Connection.Driving circuit 82 is connected with rotary actuator 41.Driving circuit 83 is connected with mobile motor 42.Driving circuit 84 and pressure
Cloth motor 43 is connected.Rotary actuator 41, mobile motor 42 and compress motor 43 are impulse motor.In the output shaft of main motor 27
Equipped with encoder 27A, it is equipped with encoder 41A in the output shaft of rotary actuator 41, is equipped with coding in the output shaft of mobile motor 42
Device 42A is equipped with encoder 43A in the output shaft of compress motor 43.Encoder 27A detects the rotation position of the output shaft of main motor 27
It setting, and exports the rotation position to CPU91 through I/O45, encoder 41A detects the rotation position of the output shaft of rotary actuator 41,
And the rotation position is exported to CPU91 through I/O45, encoder 42A detects the rotation position of the output shaft of mobile motor 42, and passes through
I/O45 exports the rotation position to CPU91, and encoder 43A detects the rotation position of the output shaft of compress motor 43, and through I/
O45 exports the rotation position to CPU91.CPU91 obtains the testing result of encoder 27A, and sends and control to driving circuit 81
Signal, CPU91 obtains the testing result of encoder 41A, and sends control signal to driving circuit 82, and CPU91 obtains encoder
The testing result of 42A, and control signal is sent to driving circuit 83, CPU91 obtains the testing result of encoder 43A, and to drive
Dynamic circuit 84 sends control signal.Therefore, CPU91 can control main motor 27, rotary actuator 41, mobile motor 42 and compress horse
Up to 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.In S1
In, testing result of the CPU91 based on encoder 21 obtains the rotation angle of the output shaft 18 of clamp motor 16.The rotation angle is most
Initial equilibrium state, output shaft 18 reference phase, is stored in RAM93.CPU91 is come by the testing result of acquisition operating knob 47
Obtain the regulation tension (S2) to assign to upper thread 6.Operating knob 47 is operated by operator, 6 imparting of upper thread is opened to input
Power.Operating knob 47 is operated in operator, when input specific value is as regulation tension, CPU91 obtains inputted regulation tension.
It is also possible to CPU91 and obtains initial value as regulation tension.CPU91 obtains the specified amount (S3) that operating knob 47 is inputted.Regulation
Amount is the confidential regulation supply amount to the upper thread 6 supplied between cable-clamping disc 69 and stitching 98 when tangent line opportunity is identical.By
Operator operates operating knob 47 to input specified amount.When operator operates operating knob 47, inputs specific value as specified amount,
CPU91 obtains inputted specified amount.It is also possible to CPU91 and obtains initial value as specified amount.CPU91 is obtained in S2
Regulation tension corresponding to target value calculated (S4).Tension force of facial suture has related to torque caused by clamp motor 16
Relationship.Target value is that the value of the tension force of facial suture calculated based on the correlativity stored in storage device 94 reaches regulation
The phase difference of output shaft 18 when power.The specified amount obtained in S3 is supplied between CPU91 opposite direction cable-clamping disc 69 and stitching 98
The rotation amount of output shaft 18 needed for upper thread 6 is calculated (S5).Pass of the CPU91 based on specified amount Yu the rotation amount of output shaft 18
It is formula, and according to the specified amount obtained in S3, calculates the rotation amount of output shaft 18.The relational expression is stored in storage device
94。
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
The rotation angle of formula and the output shaft 18 obtained in S1, to determine energization type.CPU91 is according to the energization class decided
Type executes energization to multiple coils 33.
CPU91 controls the driving of drive motor, forms stitching 98 (S9) in cloth 99.Shank 11, rotating shuttle 39 and cloth pushing table
37 are acted with being mutually in step.CPU91 executes clamp motor driving processing (S10).Clamp motor driving processing is to upper thread
The processing that tension is controlled.As shown in figure 9, testing result of the CPU91 based on encoder 21, obtains the output of clamp motor 16
The rotation angle (S21) of axis 18.CPU91 is judged (S22) to whether fiducial value is greater than threshold value.Fiducial value is the phase of output shaft 18
Potential difference subtracts the value obtained after target value.CPU91 uses the rotation angle of the output shaft 18 obtained in S21, calculates in S4
The reference phase stored in the target value and RAM93 come, to calculate fiducial value.Threshold value determines according to target value, and is big
In 0 numerical value.When sewing acts by sewing machine 1, the multiple lines of the current direction for the energization type decided in S8
Circle 33.When sewing acts by sewing machine 1, phase difference is theoretically 0 (S22: no).At this point, CPU91 terminates clamp motor
Driving processing.
Testing result of the CPU91 based on operating knob 47, to whether detect sewing machine 1 sewing finishing instruction judge
(S11).Sewing finishing instruction indicates to stop the operation of pedal 38 by operator, or the sewing finishing based on stitch data.?
CPU91, which is judged as, is not detected (S11: no) when sewing finishing indicates, CPU91 makes processing be transferred to S10, and repeats S10
And S11.Output shaft 18 is rotated slowly in a manner of releasing upper thread 6 successively to the direction of the supply, and fiducial value rises, on tension force of facial suture
It rises.
After the clamp motor driving for beginning to pass through stipulated number from sewing processing is handled (S10), fiducial value is become larger than
Threshold value (S22: yes).At this point, tension force of facial suture is greater than the regulation tension obtained in S2.CPU91 is determined for multiple coils 33
Energization type (S23).Rotation of the CPU91 based on the first relational expression, the second relational expression and the output shaft 18 obtained in S21
The energization type (S23) of the difference of the phase difference that can eliminate output shaft 18 and target value is determined at angle.CPU91 will be directed to
The energization type that multiple coils 33 execute is switched to the specific energization type (S24) got off in S23.Output shaft 18 rotates, face
Line tension is restored to the regulation tension obtained in S2.At this point, CPU91 is using the rotation angle of postrotational output shaft 18 as benchmark
Phase is rewritten in RAM93.CPU91 terminates clamp motor driving processing.When CPU91 executes S23 every time, it is all based on volume
The testing result of code device 21 determines energization type (S23), and switches the energization type (S24) of multiple coils 33.Pass through CPU91
S10 is repeated, so that tension force of facial suture is maintained the regulation tension obtained in S2 by sewing machine 1.
When CPU91 is judged as and detects sewing finishing instruction (S11: yes), output valve of the CPU91 based on encoder 27A,
To whether being to be judged (S12) on tangent line opportunity.The rotation angle based on encoder 27A, upper axis 15 be specified value (such as
250 degree) when, CPU91 is judged as YES tangent line opportunity.Tangent line opportunity is for example set in the rule during the shuttle in Fig. 7 captures in L1
Timing is carved.When it is not tangent line opportunity that CPU91, which is judged as, (S12: no), CPU91 is executed at clamp motor driving same as S10
It manages (S17), later, makes that processing returns to S12.
When CPU91 is judged as YES tangent line opportunity (S12: yes), CPU91 drives electromagnetic component 57, starts to control tangent line
The driving (S13) of device 59.CPU91 controls driving circuit 85, drives clamp motor 16, and monitor the output of encoder 21
Value, makes output shaft 18 be rotated in the rotation amount (S14) calculated in S5.CPU91 is controlling the same of the driving of thread cutter 59
One opportunity controlled the driving of feed mechanism 60, the upper thread 6 of specified amount is supplied between cable-clamping disc 69 and stitching 98.Existing seam
It threads in the case where machine, " the same opportunity of the driving of control thread cutter 59 " with by cable-clamping disc 69 either unclamp to mitigate
On identical opportunity on the opportunity of tension force of facial suture, it is also possible to during the driving of thread cutter 59, can also be thread cutter 59
After driving.The upper thread 6 of specified amount is for example supplied to cable-clamping disc 69 and stitching 98 period L3 (referring to Fig. 7) is inner by CPU91
Between, this period L3 refers to uses thread cutter 59 by 6 cutting of upper thread since the opportunity for reaching shank lower dead center to horse back
Before during.When clamp motor 16 drives, thus the direction of the supply (clockwise direction of right apparent time) of the cable-clamping disc 69 to upper thread 6
Rotation, upper thread 6 is released successively.Therefore, in during feed mechanism 60 is before being cut off upper thread 6 using thread cutter 59,
The upper thread 6 of specified amount is supplied between cable-clamping disc 69 and thread take-up tension lever 51.
In feed mechanism 60 for starting the driving of control thread cutter 59, thread cutter in S13 after giving upper thread 6
59 clip upper thread 6 and baseline 9 using cutter 58 and are cut off.At this point, due to being fed into cable-clamping disc 69 and thread take-up tension lever 51
Between, the upper thread 6 of specified amount so that face when tension force of facial suture is sufficiently smaller than before supplying upper thread 6 using feed mechanism 60
Line tension.CPU91 makes the driving of drive motor stop (S15).CPU91 controls the driving of compress motor 43, increase presser feet 24
(S16), later, terminate 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 upper thread 6 is suture of the invention
An example, clamp motor 16 are an examples of driver of the invention (motor), and feed mechanism 60 is an example of supply unit of the invention,
Control device 30 is an example of control unit of the invention, and operating knob 47 is an example of input unit of the invention.When execution S9
CPU91 is an example of sewing control unit of the invention.CPU91 when executing S13 is an example in tangent control portion.When executing S14
CPU91 be supply control part of the invention an example.CPU91 when executing S15 is an example of stop control unit of the invention.
CPU91 when executing S3 is an example of line amount acquisition unit of the invention.CPU91 when executing S5 is the one of calculation part of the invention
Example.
The sewing machine 1 of above embodiment controls feed mechanism 60 on the same opportunity of the driving of control thread cutter 59
Driving, the upper thread 6 of specified amount is supplied between cable-clamping disc 69 and stitching 98 (S14).Upper thread 6 is cut using thread cutter 59
Tension force of facial suture when disconnected becomes stable because of the upper thread 6 of the specified amount supplied.Therefore, sewing machine 1, which can be reduced, is utilizing tangent line
The situation for the rear wires surplus unevenness that device 59 cuts off upper thread 6 can prevent that stitching defect occurs when starting sewing next time.
The sewing machine 1 of above embodiment in such a way that cable-clamping disc 69 can rotate supports the cable-clamping disc 69 by having
The clamp motor 16 of output shaft 18, by rotating cable-clamping disc 69 by output shaft 18, to assign tension to upper thread 6.Sewing
Machine 1 controls the driving of clamp motor 16, makes cable-clamping disc 69 in the same opportunity of the driving of the control thread cutter 59 in S13
It rotates, will be supplied between cable-clamping disc 69 and stitching 98 in the upper thread 6 of the specified amount obtained in S3 to the direction of the supply of upper thread 6
(S14).Sewing machine 1 can be such that cable-clamping disc 69 rotates by controlling the driving of clamp motor 16, and the upper thread 6 of specified amount is supplied
To between cable-clamping disc 69 and stitching 98.Since sewing machine 1 rotates cable-clamping disc 69 using motor, it can be shorter
Accurately the upper thread of specified amount 6 is supplied between cable-clamping disc 69 and stitching 98 in time.For sewing machine 1, and it will supply
Mechanism 60 can make to supply compared with the situation near the feed path that upper thread 6 is arranged in such a way that cable-clamping disc 69 is mutually independent
Structure near path is relatively simple.
Sewing machine 1 has the operating knob 47 for being used to input specified amount.Sewing machine 1 obtains the specified amount that operating knob 47 is inputted
(S3).Output shaft 18 needed for supplying the upper thread 6 of the specified amount obtained in S3 between the opposite cable-clamping disc 69 of sewing machine 1 and stitching
Rotation amount calculated (S5).Sewing machine 1 controls clamp motor 16 on the same opportunity of the driving of control thread cutter 59
Driving, makes output shaft 18 be rotated in the rotation amount calculated in S5, thus, it is possible to which the upper thread 6 of specified amount is supplied to clamp
Between disk 69 and stitching 98 (S14).The upper thread 6 for the specified amount that operating knob 47 is inputted can be supplied to cable-clamping disc by sewing machine 1
Between 69 and stitching 98.Operator can set optimal specified amount on the basis of considering sewing condition.
Sewing machine 1 on the same opportunity of the driving of control thread cutter 59 will be provided before upper thread 6 is cut off
The upper thread 6 of amount is supplied between cable-clamping disc 69 and stitching 98.For sewing machine 1, compared to the drive in control thread cutter 59
Dynamic same opportunity and be that the upper thread 6 of specified amount is supplied between cable-clamping disc 69 and stitching 98 after upper thread 6 is cut off
Situation can utilize the upper thread 6 of supplied specified amount, more reliably make when being cut off upper thread 6 using thread cutter 59
Tension force of facial suture is stablized.
The upper thread of specified amount 6 is being supplied between cable-clamping disc 69 and thread take-up tension lever 51 by sewing machine 1 in period L3.Such as Fig. 7 institute
Show, sewing machine 1 can be in tension force of facial suture less than the upper thread of (thread take-up tension lever lifts period L2) when being lifted upper thread 6 using thread take-up tension lever 51
In the case where tension, the upper thread 6 of specified amount is supplied between cable-clamping disc 69 and stitching 98.Sewing machine 1, which will be able to suppress, to advise
After quantitative upper thread 6 is supplied between cable-clamping disc 69 and thread take-up tension lever 51, the upper thread when being lifted upper thread using thread take-up tension lever 51
The situation of power unevenness.
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.Can be, the feed mechanism 60 in sewing machine by with cable-clamping disc it is mutually independent in a manner of set
It sets near the feed path of upper thread 6.It is also possible to that releasing portion successively is arranged in sewing machine, releasing portion is used for face successively for this
Line is released between thread take-up tension lever and cable-clamping disc successively.Being also possible to feed mechanism is such mechanism: suture is clipped in driven voller
Between driven roller, make driven roller continuous rotation, so that suture is released between cable-clamping disc and stitching successively.It is also possible to
Feed mechanism is such mechanism: making the mobile length to change upper thread path of the rod member being in contact with upper thread, thus will
Suture is released between cable-clamping disc and stitching successively.The driver of feed mechanism is either single-phase motor, is also possible to three-phase
Above motor can also be the various electric notors such as DC motor, core free motor, can also be electromagnetic component, cylinder etc..It can be with
It is to omit input unit in sewing machine, is also possible to input of the sewing machine with other structures such as dial-type input unit, touch tablets
Portion.It is also possible to feed mechanism baseline is supplied between cable-clamping disc and stitching using the power of driver, is also possible to cut
Line apparatus only cuts off baseline.It is also possible to the present invention such as applied to baseline cutting mechanism round end button holing sewing machine.?
It can be, thread cutter 59 does not cut off baseline 9, but only cuts off upper thread 6.It is also possible to thread cutter 59 with motor
Etc. substituting electromagnetic component 57.
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.
It is also possible to before driving thread cutter supply suture using feed mechanism.It is also possible to sewing machine control to supply
To the driving of mechanism, the suture of specified amount is supplied between thread take-up tension lever and stitching.It can be, sewing machine omits the place of S3, S5
Reason, makes the output shaft of clamp motor rotate pre-set rotation amount in S14.It can be, the thickness of sewing machine and cloth,
Stitching width etc. correspondingly sets specified amount automatically.It is also possible to sewing machine and suitably omits S2, S4, S8, S10, S17.
Claims (4)
1. a kind of sewing machine, which is included
Sewing unit (12), with shank (11), which is equipped with eedle (10), and the shank can move up and down, the seam
Portion processed can form stitching (98) in cloth using the eedle;
Cable-clamping disc (69) is wound with suture (6) in the cable-clamping disc;
Thread cutter (59) can cut off the suture in the lower section of the shank;And
Control unit (30), is used to control the driving of the sewing unit and the thread cutter,
The sewing machine is characterized in that,
The sewing machine has supply unit (60), which has driver, which can utilize the dynamic of the driver
The suture is supplied between the cable-clamping disc and the stitching by power,
The control unit is functioned as sewing control unit, tangent control portion, supply control part and stop control unit,
The sewing control unit is used to control the driving of the sewing unit, forms the stitching in the cloth,
The tangent control portion is for starting the driving for controlling the thread cutter;
The supply control part is used to control institute on the same opportunity for the driving for controlling the thread cutter by the tangent control portion
The suture of specified amount is supplied between the cable-clamping disc and the stitching by the driving for stating supply unit,
The stop control unit is used to that the suture to be supplied to institute in the driving for controlling the supply unit by the supply control part
After stating between cable-clamping disc and the stitching, stop the driving of the sewing unit by the sewing control unit control.
2. sewing machine according to claim 1, which is characterized in that
The driver is motor (16), which has output shaft (18), which can be rotated with the cable-clamping disc
Mode supports the cable-clamping disc, and the motor is by rotating the cable-clamping disc by the output shaft, to assign to the suture
Tension is given,
The supply control part is in the same opportunity for the driving for controlling the thread cutter by the tangent control portion, control
The driving of the motor rotates the cable-clamping disc to the direction of the supply of the suture, and the suture of the specified amount is supplied
It is given between the cable-clamping disc and the stitching.
3. sewing machine according to claim 2, which is characterized in that
The sewing machine also has input unit (47), which is used to input and to supply between the cable-clamping disc and the stitching
The specified amount,
The control unit is also used as line amount acquisition unit and calculation part to function,
The line amount acquisition unit is used to obtain the specified amount that the input unit is inputted,
The calculation part is used to supply the rule acquired in the line amount acquisition unit between the opposite cable-clamping disc and the stitching
The rotation amount of the output shaft of the motor needed for the quantitative suture is calculated,
The supply control part controls the driving of the motor on the same opportunity for the driving for controlling the thread cutter,
The output shaft is set to rotate the rotation amount calculated by the calculation part.
4. sewing machine described in any one of claim 1 to 3, which is characterized in that
The supply control part on the same opportunity for the driving for controlling the thread cutter is cut off by the suture
Before, the suture of the specified amount is supplied between the cable-clamping disc and the stitching.
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JP2018056120A JP2019166038A (en) | 2018-03-23 | 2018-03-23 | sewing machine |
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CN110295462B CN110295462B (en) | 2021-06-15 |
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Cited By (1)
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CN114000271A (en) * | 2020-07-27 | 2022-02-01 | 杰克缝纫机股份有限公司 | Active thread supply device, sewing machine and active thread supply method |
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JPH09220391A (en) * | 1995-12-13 | 1997-08-26 | Juki Corp | Yarn tension control device of sewing machine |
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