CN109554838A - Sewing machine - Google Patents
Sewing machine Download PDFInfo
- Publication number
- CN109554838A CN109554838A CN201811113552.8A CN201811113552A CN109554838A CN 109554838 A CN109554838 A CN 109554838A CN 201811113552 A CN201811113552 A CN 201811113552A CN 109554838 A CN109554838 A CN 109554838A
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- CN
- China
- Prior art keywords
- sewn object
- sewing machine
- withdrawing roll
- motor
- cloth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/10—Work-feeding means with rotary circular feed members
- D05B27/18—Feed cups
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B19/00—Programme-controlled sewing machines
- D05B19/02—Sewing machines having electronic memory or microprocessor control unit
- D05B19/12—Sewing machines having electronic memory or microprocessor control unit characterised by control of operation of machine
- D05B19/16—Control of workpiece movement, e.g. modulation of travel of feed dog
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The present invention provides sewing machine, is directed to the thickness variation of stage portion etc. and realizes good preceding draw and convey.Sewing machine includes cloth pressing, is pressurized from above by sewn object；Cloth feeding mechanism is conveyed sewn object to defined direction of feed by feeding tooth；Preceding withdrawing roll conveys sewn object to direction of feed downstream side in the direction of feed downstream side compared with cloth pressing；And preceding drawing motor, fabric thickness sensor is included in the sewing machine, and the thickness of the sewn object on needle plate is detected；Roller elevating motor, withdrawing roll goes up and down and is directed to being adjusted by Compressive Strength for sewn object to preceding withdrawing roll before making；Control device, preceding drawing motor and roller elevating motor are individually controlled by it, correspondingly, revolving speed to the preceding withdrawing roll by preceding drawing motor realization and the preceding withdrawing roll realized by roller elevating motor change adjusting by Compressive Strength to the thickness change of the sewn object of control device and the detection based on fabric thickness sensor.
Description
Technical field
The present invention relates to the sewing in the direction of feed downstream side of the sewn object relative to cloth pressing with preceding withdrawing roll
Machine.
Background technique
The known sewing at needle downing position with the preceding withdrawing roll for being configured at the direction of feed downstream side compared with feeding tooth
Machine.The sewing machine by be different from feeding tooth by independent driving source carry out rotation driving preceding withdrawing roll, with improve conveying
The state of power carries out the sewing of sewn object (for example, referring to Japanese Unexamined Patent Publication 2001-120870 bulletin).
But above-mentioned existing sewing machine, if there are the part i.e. stage portion that thickness thickens, platforms in sewn object
Rank portion becomes resistance when being sent into the downside of cloth pressing, reduces there are the amount of feeding and gathers spacing such problems.
Summary of the invention
The present invention is the sewing machine that can be directed to the thickness variation of stage portion etc. and realize good conveying, is had following
(1) to the arbitrary feature of (12).
(1)
A kind of sewing machine, includes
Cloth pressing presses sewn object from top；
Cloth feeding mechanism is conveyed sewn object to defined direction of feed by feeding tooth；
Preceding withdrawing roll, in the direction of feed downstream side compared with the cloth pressing by the sewn object to direction of feed
Downstream side conveying；And
Preceding drawing motor is the rotary driving source of the preceding withdrawing roll,
The sewing machine is characterized in that, comprising:
Fabric thickness sensor detects the thickness of the sewn object on needle plate；
Roller elevating motor, make the preceding withdrawing roll lifting and to the preceding withdrawing roll for the sewn object by pressure
Degree is adjusted；And
The preceding drawing motor and the roller elevating motor are individually controlled by control device,
The thickness change phase of the control device and the sewn object detected by the fabric thickness sensor
Ying Di, revolving speed to the preceding withdrawing roll by drawing motor to realize before described and passes through the institute that the roller elevating motor is realized
Withdrawing roll changes adjusting by Compressive Strength before stating.
(2)
In the sewing machine that above-mentioned (1) is recorded, which is characterized in that
The control device identifies the step of the sewn object in the detection by the fabric thickness sensor
In the case that portion reaches the cloth pressing, carry out following controls, that is, by by the roller elevating motor realize it is described before
Withdrawing roll is set as the pressure higher than reference pressure by Compressive Strength.
(3)
In the sewing machine that above-mentioned (2) are recorded, which is characterized in that
The control device identifies that the stage portion of sewn object arrives in the detection by the fabric thickness sensor
In the case where the cloth pressing, following controls are carried out, that is, will pass through the preceding preceding withdrawing roll for drawing motor to realize
Revolving speed is set as the speed faster than reference speed.
(4)
In the sewing machine that any one of above-mentioned (1) to (3) is recorded, which is characterized in that
The control device carries out down in the case where the stage portion for identifying the sewn object reaches the preceding withdrawing roll
State control, that is, the preceding withdrawing roll realized by the roller elevating motor is set as lower than reference pressure by Compressive Strength
Pressure.
(5)
In the sewing machine that above-mentioned (4) are recorded, which is characterized in that
The control device carries out down in the case where the stage portion for identifying the sewn object reaches the preceding withdrawing roll
State control, that is, the speed faster than reference speed will be set as by the revolving speed of the preceding preceding withdrawing roll for drawing motor to realize.
(6)
In the sewing machine that any one of above-mentioned (1) to (5) is recorded, which is characterized in that
The sewing machine is double ring seam sewing machine, and is connected after sewing finishing with sewn object and forms idle loop,
There is cloth end sensor, front end and terminal part of the cloth end sensor to the sewn object in the sewing machine
It is detected, to whether there is or not the sewn objects to detect at the pressing position of the cloth pressing,
If detecting the terminal part of the sewn object by the cloth end sensor, the control device is carried out
Following controls, that is, the preceding withdrawing roll realized by the roller elevating motor is pressed into pressure for the sewn object
Degree is set as the pressure higher than reference pressure.
(7)
In the sewing machine that above-mentioned (6) are recorded, which is characterized in that
If detecting the terminal part of the sewn object by the cloth end sensor, the control device is carried out
Following controls, that is, the speed faster than reference speed will be set as by the revolving speed of the preceding preceding withdrawing roll for drawing motor to realize.
(8)
In the sewing machine that above-mentioned (6) or (7) are recorded, which is characterized in that
The control device carries out down in the case where the front end for identifying the sewn object reaches the preceding withdrawing roll
State control, that is, the preceding withdrawing roll realized by the roller elevating motor is pressed into Compressive Strength for the sewn object
It is set as the pressure lower than the reference pressure.
(9)
In the sewing machine that above-mentioned (8) are recorded, which is characterized in that
The control device carries out down in the case where the front end for identifying the sewn object reaches the preceding withdrawing roll
State control, that is, the speed faster than reference speed will be set as by the revolving speed of the preceding preceding withdrawing roll for drawing motor to realize.
(10)
In the sewing machine that any one of above-mentioned (6) to (9) are recorded,
With presser foot motor, the presser foot motor to the pressing force for the sewn object of the cloth pressing into
Row is adjusted,
If detecting the front end of the sewn object by the cloth end sensor, the control device is carried out
Following controls, that is, by the pressing force for the sewn object for the cloth pressing realized by the presser foot motor
It is set as the pressure higher than reference pressure.
(11)
In the sewing machine that any one of above-mentioned (1) to (10) is recorded, which is characterized in that
With presser foot motor, the presser foot motor to the pressing force for the sewn object of the cloth pressing into
Row is adjusted,
The control device is carried out in the case where identifying that the cloth pressing jumps onto the stage portion of the sewn object
Following controls, that is, by the pressing force for the sewn object for the cloth pressing realized by the presser foot motor
It is set as the pressure higher than reference pressure.
(12)
The sewing machine that above-mentioned (1) is recorded is characterized in that, comprising:
Presser foot motor；
Foot-pressing bar keeps the cloth pressing in lower end；
Upper paraphysis clasps portion and lower paraphysis clasps portion, and each is fixed on the upper and lower of the foot-pressing bar；
Sleeve is configured at the downside that the upper paraphysis clasps portion, relative to foot-pressing bar to can slide up and down；
Presser feet spring, is configured at the sleeve and the lower paraphysis is clasped between portion；
Presser foot motor links via transmission mechanism with the sleeve；And
Cloth pressing mechanism, by the way that the sleeve is adjusted to arbitrary height using the presser foot motor, thus
The pressing force for sewn object of cloth pressing can be adjusted,
The control device is carried out in the case where identifying that the cloth pressing jumps onto the stage portion of the sewn object
Following controls, that is, the increase with the detection thickness obtained by the fabric thickness sensor matchingly utilizes the presser feet
Motor rises the sleeve, and pressing force is maintained constant.
The effect of invention
The control device of sewing machine of the invention and the thickness change of sewn object correspondingly press Compressive Strength to preceding withdrawing roll
Adjusting is changed with revolving speed, good preceding draw is carried out thus, it is possible to the thickness variation for stage portion etc. and conveys, inhibit by platform
The accumulation of spacing caused by rank portion.
Detailed description of the invention
Fig. 1 is the oblique view of the submitting double ring seam sewing machine of wrist type of the embodiment as invention.
Fig. 2 is the front view for indicating the outline of the submitting double ring seam sewing machine of wrist type of the embodiment as invention.
Fig. 3 is the left side view of cloth pressing mechanism and roller feed mechanism from facing side.
Fig. 4 is the oblique view of preceding withdrawing roll mechanism.
Fig. 5 is the block diagram for indicating the control system of sewing machine.
Fig. 6 is the oblique view of cloth end sensor.
The timing of the action control in each portion when Fig. 7 is the sewing for the sewing machine entirety for indicating that the CPU of control device is carried out
Figure.
Fig. 8 (A)~Fig. 8 (D) is the action specification of the action control in each portion when successively indicating the sewing of sewing machine entirety
Figure.
The movement in each portion when Fig. 9 (E)~Fig. 9 (H) is the and then sewing for successively indicating sewing machine entirety of Fig. 8 (D)
The action specification figure of control.
The explanation of label
11 needle plates
16 sewing machine electromotors
Withdrawing roll mechanism before 20
Withdrawing roll before 21
24 roller elevating motors
Motor is drawn before 25
70 cloth pressing mechanisms
71 cloth pressings
73 presser foot motors
76 presser feet height detection portions
77 cloth end sensors
90 control devices
100 sewing machines
161,241,251,732 encoder
762 fabric thickness sensors
C sewn object
Ce terminal part
The front end Cs
D stage portion
K idle loop
Pm1, Pm2 set pressure
Pmn reference pressure
Ps1~Ps3 sets pressure
Psn reference pressure
Vm1~Vm3 setting speed
Vmn reference speed
Vs1~Vs3 setting speed
Vsn reference speed
Specific embodiment
[outline structure of embodiment]
In the following, being described in detail to the sewing machine as embodiments of the present invention.
Fig. 1 is the oblique view of sewing machine 100, is by a part of sewing machine stand 110 Fig. 2 shows the outline of sewing machine 100
The front view indicated by double dot dash line.
Sewing machine 100 as embodiments of the present invention is the double ring seam sewing machine of so-called submitting wrist type, comprising: seam
Rack of threading 110；Cloth pressing mechanism 70, by cloth pressing 71 from top to the sewing machine base portion 101 described below
The sewn object C of the upper surface of the needle plate 11 of setting is pressed；Suture needle reciprocating mechanism, relative to the quilt on needle plate 11
Sewing object C two suture needles of progress fall needle；Cloth feeding mechanism, in the lower section of cloth pressing 71 by being sewn on needle plate 11
Object C is conveyed by cloth direction of feed as defined in feeding teeth directional (not shown)；Looper mechanism, relative to suture needle side
Online air exercise loop wire is wound；Preceding withdrawing roll mechanism 20, in the cloth direction of feed downstream side of cloth pressing 71, independently of cloth
Expect feed mechanism, carries out the feeding of sewn object C；Idle loop cutter 17, idle loop is cut off；And control device 90, it is right
Above-mentioned each structure is controlled.
In addition, above-mentioned sewing machine 100 have the double ring seam sewing machine of common submitting wrist type possessed by take-up linkage,
Each structure such as line adjuster, but these are well known structures, and and the description is omitted.
[sewing machine stand]
Above-mentioned sewing machine stand 110 includes sewing machine base portion 101, is integrally located at lower part in sewing machine；Longitudinal body
Portion 102, the one end in sewing machine base portion 101 are uprightly arranged upwards；And sewing machine arm 103, from longitudinal machine
The upper end in body portion 102, which is risen to prescribed direction, to be stretched out.
In the following, the horizontal direction parallel with the length direction of sewing machine arm 103 is set as Y direction, by sewing machine arm
The facing side in portion 103 is set as " left side ", and longitudinal 102 side of body portion is set as " right side ".In addition, by horizontal direction and with Y direction just
The direction of friendship is set as X-direction.The X-direction is parallel with the direction of feed of sewn object C involved in sewing machine 100, will be by
The direction of feed downstream side of sewing object C is set as " preceding ", and upstream side is set as " rear ".In addition, will be with X-direction and Y direction just
The direction of friendship is set as Z-direction, and one side is set as "upper", another party is set as "lower".
In addition, above-mentioned sewing machine base portion 101 includes the first extension 101a, to cloth under longitudinal body portion 102
Expect that direction of feed upstream side (rear) is stretched out；Second extension 101b, from the front end of the first extension 101a to sewing
103 same direction of horn portion (left) stretches out；And third extension 101c, from the front end of the second extension 101b to cloth
Expect that direction of feed downstream side (front) is stretched out.
Sewing machine base portion 101 is used as the operation post of sewn object, therefore above-mentioned first to third extension 101a~
It is connected in the same plane along X-Y plane to the respective upper surface globality of 101c, is formed to globality flat.
[suture needle reciprocating mechanism]
Suture needle reciprocating mechanism includes axis, is configured at the inside of sewing machine arm 103, is sewed electric motor
16 carry out rotation driving, and configure along the y axis；Needle bar keeps 2 suture needles in lower end；And it is not shown
Crank mechanism, the rotary force of upper axis is transformed to the reciprocating driving force moved up and down and is transferred to needle bar.
In addition, the needle downing position of two suture needles in sewing machine base portion 101 is provided with the needle parallel with X-Y plane
Plate 11.
Sewing machine base portion 101 is substantially in U-shaped in plan view.
[looper mechanism]
Looper mechanism includes two loopers, is set to the downside of needle plate 11；And movement transmission mechanism, make
The front end of these loopers moves back and forth along the y axis.
Each looper has been inserted through looper line in the threading hole of sharp front end.Moreover, each looper is in needle plate
Under suture needle relative to rising, enter towards left, thus looper line be inserted through in online wire loop, towards after right
It moves back, thus forms wire loop in looper line, protrude into suture needle to the wire loop of looper line by falling needle next time.It is dynamic by repeating these
Make, so that the wire loop of looper line and online wire loop are alternately inserted into and run through and form knotting.
It acts transmission mechanism and regard sewing machine electromotor 16 as driving source, the integral cycle rotating of the sewing machine electromotor 16 is become
It is changed to reciprocating rotation and is transferred to each looper, move back and forth each looper along the y axis.
[cloth feeding mechanism]
Cloth feeding mechanism includes feeding tooth, passes in and out from the opening portion (not shown) of needle plate 11；And feeding transmitting machine
Structure, by the reciprocating action of Z-direction and the reciprocating action of X-direction synthesis to feeding tooth transmitting.
Feeding tooth has jagged tooth, and the jagged tooth is from the slit-shaped along the x axis formed in needle plate 11
Opening portion disengaging is carried out by long circular motion made of the reciprocating action of Z-direction and the reciprocating action of X-direction synthesis, in length
Tooth top is forwardsed while protruding upwards from opening portion and is moved when top in circle is moved, can be by sewn object C
It conveys forwards.
It feeds transmission mechanism and regard sewing machine electromotor 16 as driving source, the integral cycle rotating of the sewing machine electromotor 16 is become
Be changed to reciprocating action along the x axis and along Z-direction reciprocating action and be transferred to feeding tooth, thus assigned to the feeding tooth
Long circular motion.
[cloth pressing mechanism]
Fig. 3 is the left side view of cloth pressing mechanism 70 and roller feed mechanism 20 from facing side.
As shown in Figures 2 and 3, cloth pressing mechanism 70 includes cloth pressing 71, carries out from top to sewn object C
Pressing；Foot-pressing bar 72 keeps cloth pressing 71 in lower end；Presser foot motor 73 becomes cloth pressing 71
Go up and down driving source；Transmission mechanism 74 transmits lifting action from presser foot motor 73 to foot-pressing bar 72 and cloth pressing 71；Presser feet
Spring 75 presses downwards cloth pressing 71 via foot-pressing bar 72；And presser feet height detection portion 76, to cloth pressure
The height of foot 71 is detected.
Cloth pressing 71 be that bottom surface is smooth and cloth direction of feed upstream side (rear side) upwards warpage rise it is so-called
The presser feet of boat-shaped.Cloth pressing 71 is configured on the opening portion of needle plate 11, from top to the sewn object C conveyed by feeding tooth into
Row pressing, makes the conveying capacity for feeding tooth suitably be transferred to sewn object C.
Foot-pressing bar 72 near needle bar along the state of Z-direction in the inside of sewing machine arm 103, on being configured at
The metal bearing 721,721 at lower two positions can support up or down.
In the upper end of foot-pressing bar 72 equipped with winning component 724, this win component 724 for and being won with hand incite somebody to action
Cloth pressing 71 lifts.
Between the metal bearing 721 of the upside of foot-pressing bar 72 and the metal bearing 721 of downside, upper paraphysis clasps portion 722
With lower paraphysis clasp portion 723 all by clasp fastening and in upper and lower fixed equipment in foot-pressing bar 72.
Moreover, being equipped with relative to foot-pressing bar 72 in the downside that upper paraphysis clasps portion 722 to the sleeve that can be slided up and down
725, the presser feet spring 75 that coiled type is equipped between portion 723 is clasped in the sleeve 725 and lower paraphysis.
In addition, upper paraphysis clasps portion 722 under compared with the combined length of naturally long presser feet spring 75 and sleeve 725
Paraphysis clasps the narrow every being set between the upper and lower of portion 723, clasps portion 722 in upper paraphysis and lower paraphysis is clasped between portion 723, become pressure
Foot spring 75 is compressed always, and foot-pressing bar 72 is pressed downwards always.
Presser foot motor 73 is stepping motor, the inside upper part in longitudinal body portion 102, to output it axis towards X
The state of axis direction is supported by the bracket 731 of plate.
In addition, the output shaft in presser foot motor 73 is connected with encoder 732 (referring to Fig. 5), to the shaft angle degree of output shaft
It is detected, is input to control device 90.
Transmission mechanism 74 includes driving gear 741, and fixed equipment is in the output shaft of presser foot motor 73；It is generally fan-shaped
Driven gear 742；The linkage component 745 of crank throw shape has forked rotation wrist 746,747；And connecting rod 749,
Driven gear 742 and linkage component 745 are linked.
Driving gear 741 and driven gear 742 are spur gears, are reciprocally engaged.
Driven gear 742 can turn about the X axis, and the wrist 743 stretched out to its radial direction outside can turn about the X axis ground
Link with the one end of connecting rod 749.
Linkage component 745 can be supported in sewing machine arm 103 with turning about the X axis, and a rotation wrist 746 can be around X
Axis rotationally links in the other end of connecting rod 749, another rotation wrist 747 connects via square slider 748 and sleeve 725
Knot.
Square slider 748 can with turning about the X axis with rotation wrist 747 link, relative to sleeve 725 be arranged along Y-axis
The slot in direction can be slidingly engaged in.
According to these, if clockwise direction from presser foot motor 73 to Fig. 2 driving, via driving gear 741, from
Moving gear 742, connecting rod 749, linkage component 745, square slider 748, sleeve 725 rise, if presser foot motor 73 is to Fig. 2
In counter clockwise direction driving, then sleeve 725 decline.
If sleeve 725 declines and presser feet spring 75 is compressed, the pressing force of cloth pressing 71 increases, if sleeve
725 rise and the elongation of presser feet spring 75, then the pressing force of cloth pressing 71 is reduced.In addition, if sleeve 725 it is further up and
Portion 722 is clasped with upper paraphysis to abut, then cloth pressing 71 is lifted upwards and can be retreated to the relieving position of sewn object C
It sets.
Sleeve 725 can be adjusted to arbitrary height along Z-direction by presser foot motor 73, and thereby, it is possible to cloth pressure
The pressing force relative to sewn object C of foot 71 is adjusted.
Height detection portion 76 is made of components described below: detected body 761, is supported in lower paraphysis and is clasped portion 723；And cloth
Expect that thickness transducer 762, the line sensor detected by the Possessing high optical to detected body 761 are constituted.
Detected body 761 is supported in lower paraphysis and clasps portion 723, therefore with cloth pressing 71 and foot-pressing bar 72 together to upper and lower
It is moved.
Fabric thickness sensor 762 is fixed in sewing machine arm 103, is to arrange light receiving element and shape along Z-direction
At, due to being covered by detected body 761, thus the position (height) of the Z-direction to the upper end of the detected body 761 into
Row detects and is capable of detecting when the height of cloth pressing 71.The height of cloth pressing 71 and the thickness of the sewn object C on needle plate 11
Degree correspondingly changes, therefore fabric thickness sensor 762 is detected as the thickness to the sewn object C on needle plate 11
" Thickness sensitivity portion " works.
[preceding withdrawing roll mechanism]
Fig. 4 is the oblique view of preceding withdrawing roll mechanism 20.
Preceding withdrawing roll mechanism 20 is as shown in Figures 3 and 4, comprising: the preceding withdrawing roll 21 as feed rolls；Roller arm 22, to preceding drawing
Roller 21 is supported；Motor installation pedestal 23 is supported the overall structure of preceding withdrawing roll mechanism 20；Roller elevating motor
24, rotate roller arm 22；And preceding drawing motor 25, it is the rotary driving source of preceding withdrawing roll 21.
Above-mentioned motor installation pedestal 23 is configured at the front side of the front end of sewing machine arm 103, thereon end relative to
Sewing machine stand 110 can be rotationally supported around Y-axis.
The motor installation pedestal 23 is the plate along X-Z plane, its right planar side to roller elevating motor 24 and before
Motor 25 is drawn to be supported.
The central portion of roller arm 22 can rotationally be supported in the lower end of motor installation pedestal 23, one end court around Y-axis
Tiltedly upside extends forward, and links via first and second connecting rod 243,242 and with roller elevating motor 24, the other end court
Side is stretched out obliquely downward backward, and preceding withdrawing roll 21 can be pivotally supported.In addition, the other end of roller arm 22 is towards rear, by
Preceding withdrawing roll 21, is configured at the front side of cloth pressing 71 by this.
Preceding withdrawing roll 21 carries out rotation driving by synchronous belt 211, and the feeding of sewn object C is carried out via the synchronous belt 211.
The one end of synchronous belt 211 is set up in the sprocket wheel 252 in the preceding output shaft fixed equipment for drawing motor 25, via energy
Enough delivery rolls 212 and idler roller 213 that motor installation pedestal 23 is rotationally supported in around Y-axis, the other end is set up in preceding drawing
Roller 21.
Preceding withdrawing roll 21 connects with sewn object C via synchronous belt 211 and carries out feeding forwards as a result,.In addition, passing through
The preceding control for drawing motor 25, can arbitrarily be adjusted the revolving speed of preceding withdrawing roll 21.
In addition, roller arm 22 is entered rotation from roller elevating motor 24 and moves via first connecting rod 243 and second connecting rod 242
Make.
That is, the output shaft fixed equipment in roller elevating motor 24 has the one end of first connecting rod 243, first connecting rod 243
The other end be linked with the one end of second connecting rod 242.
Roller arm 22 is constructed using so-called crank throw, and the other end of one end and second connecting rod 242 links, the other end
Portion and preceding withdrawing roll 21 link.
Moreover, the central portion of roller arm 22 can rotationally be supported in the lower end of motor installation pedestal 23 around Y-axis.
Therefore, if passing through the driving of roller elevating motor 24, the roller arm 22 via first and second connecting rod 243,242
One end is endowed rotational action upwards, then the other end rotates downwards, if the one end of roller arm 22 is assigned downwards
Rotational action is given, then the other end rotates upwards.Thereby, it is possible to link with the one end of roller arm 22, make the preceding drawing of roller arm 22
The end of roller side is gone up and down, and can arbitrarily adjust the height of preceding withdrawing roll 21.Therefore, by the control of roller elevating motor 24,
Preceding withdrawing roll 21 can arbitrarily be adjusted relative to the contact pressure of the sewn object C on needle plate 11.
Roller elevating motor 24 and preceding drawing motor 25 are all to be connected with encoder 241,251 in respective output shaft, defeated
The shaft angle degree of shaft is detected and is input to control device 90.
[control system of sewing machine]
Block diagram by the control system of above-mentioned sewing machine 100 in Fig. 5 is shown.As shown in Fig. 5, sewing machine 100 have into
The control device 90 of the action control of each structure of row.Moreover, in the control device 90 via respective motor drive circuit
16a, 24a, 25a, 73a and be connected with sewing machine electromotor 16, roller elevating motor 24, preceding drawing motor 25, presser foot motor
73。
In addition, being attached in sewing machine electromotor 16, roller elevating motor 24, preceding drawing motor 25 and presser foot motor 73
To the encoder 161,241,251,732 that its rotation number is detected, the encoder 161,241,251,732 is also via motor
Driving circuit 16a, 24a, 25a, 73a and connect with control device 90.
Control device 90 has CPU 91, ROM 92, RAM 93, EEPROM 94 (EEPROM is registered trademark), after execution
The various action controls that face describes.
In ROM 92, the program of the various controls for carrying out back description is stored.
In addition, various setting data are stored in EEPROM 94, for example, the reference speed Vmn of sewing machine electromotor 16,
The preceding reference speed Vsn of preceding drawing amount for drawing motor 25, the reference pressure Pmn of the pressing force of cloth pressing 71, preceding withdrawing roll 21
It is preceding draw by Compressive Strength reference pressure Psn, the first~the second setting pressure Pm1, Pm2, first~third setting pressure Ps1~
Draw before Ps3, first~third setting speed Vm1~Vm3, first~third setting speed Vs1~Vs3, expression by Compressive Strength and
The list data of the corresponding relationship of the shaft angle degree of roller elevating motor 24 indicates height of the sleeve 725 relative to cloth pressing 71
With the corresponding relationship of the list data of the corresponding relationship of cloth pressing force, the shaft angle degree for indicating sleeve 725 and presser foot motor 73
List data, the fabric thickness for being regarded as stage portion D described below threshold value, stage portion jump onto needle number T1, preceding drawing stage portion
It jumps onto beginning needle number T2, stage portion sewing needle number T3, preceding drawing stage portion and jumps onto needle number T4, cloth front end sewing commencing speed change
Needle number T5, preceding granny rag material front end jump onto beginning needle number T6, preceding granny rag material front end jumps onto needle number T7 etc..
In addition, " the reference speed Vmn " of sewing machine electromotor 16, which refers to, carries out not having stage portion D's for sewn object C
Setting speed in the case where the sewing of the part (being set as flat part) of usual the thickness, " base of the preceding preceding drawing amount for drawing motor 25
Withdrawing roll 21 connects and the setting speed in the case where conveying with the flat part of sewn object C before Quasi velosity Vsn " refers to, cloth pressure
" the reference pressure Pmn " of the pressing force of foot 71 refers to setting when cloth pressing 71 presses the flat part of sewn object C
Pressing force, the flat part phase of withdrawing roll 21 and sewn object C before the preceding drawing of preceding withdrawing roll 21 is referred to by " the reference pressure Psn " of Compressive Strength
Setting in the case where connecing and conveying is by Compressive Strength.
The above-mentioned various data stored in above-mentioned EEPROM 94, can be defeated by the operation connecting with control device 90
Enter portion 96 and be set value and arbitrarily resets.
In addition, above-mentioned various setting data are not limited to EEPROM, be stored in flash memories, EPROM or
Non-volatile storage device such as HDD.
Aforesaid operations input unit 96 is connect via interface 96a with control device 90.Operation inputting part 96 has input picture
Face 961 shows information required when inputting various settings.
In addition, the pedal 95 for being inputted the beginning of sewing and stopping by brake pedal operation is via interface 95a and control
Device 90 processed connects.
In addition, the cloth thickness detected to the height of cloth pressing 71 is connected with via interface 762a in control device 90
Spend sensor 762.
In addition, sewing machine 100 has cloth end sensor 77, the cloth end sensor 77 in the left oblique upper of cloth pressing 71
According to the presence or absence of the pressing position carried out by the cloth pressing 71 on needle plate 11 sewn object C to the front side of sewn object C
The terminal part of front end and rear side is detected, which connect via interface 77a with control device 90.
Cloth end sensor 77 is as shown in fig. 6, be the photoelectric transducer element being made of light source and light receiving element, tiltedly towards the right side
Under be irradiated from light source by the reflecting plate 771 that the sensing light of specific wavelength is arranged near the needle downing position in needle plate 11, lead to
It crosses light receiving element and light is carried out to its reflected light.Moreover, control device 90 can be according to the reflected light obtained by light receiving element
Light reception intensity and to whether there is or not sewn object C to determine.
In addition, control device 90 can according to from " not the having sewn object C " obtained from cloth end sensor 77 to " exist by
The switching of the detecting state of sewing object C " and the front end for identifying the sewn object C conveyed.
Similarly, control device 90 can be according to from " there are sewn object C " obtained from cloth end sensor 77 to " not having
The switching of the detecting state of sewn object C " and the terminal part for identifying the sewn object C conveyed.
[sewing control]
By timing diagram and Fig. 8 (A)~Fig. 9 (H) action specification figure of Fig. 7, illustrate the CPU 91 of control device 90 into
The action control in each portion when the sewing of capable 100 entirety of sewing machine.
In sewing, in the case where the flat part to sewn object C sews, CPU 91 is used as principle, controls and is
Sewing machine electromotor 16 and preceding drawing motor 25 are driven respectively with reference speed Vmn, Vsn above-mentioned, presser foot motor
73 maintain that cloth pressing 71 is made so that preceding withdrawing roll 21 is become base as the shaft angle degree of reference pressure Pmn, the maintenance of roller elevating motor 24
The shaft angle degree of quasi- pressure Psn and sewed (referring to Fig. 7 a, Fig. 8 (A)).
Moreover, the inspection that the stage portion D of sewn object C is obtained close to cloth pressing 71 and by fabric thickness sensor 762
Thickness Measurement by Microwave is incrementally increased, if it exceeds being regarded as the threshold value (referring to b, Fig. 8 (B) of Fig. 7) of stage portion D, then is identified as being sewn
The stage portion D of object C reaches cloth pressing 71, and sewing machine electromotor 16 is decelerated to first slower than reference speed Vmn by CPU 91
Setting speed Vm1.
In addition, preceding drawing motor 25 is accelerated to the first setting speed Vs1 faster than reference speed Vsn.
In addition, roller elevating motor 24 carries out the control for declining sleeve 725, so that preceding withdrawing roll 21 becomes than base pressure
The first setting pressure Ps1 of power Psn high.
On the other hand, the increase about presser foot motor 73, with the detection thickness obtained by fabric thickness sensor 762
The control for increase sleeve 725 is matchingly carried out, is adjusted so that pressing force maintains constant value i.e. reference pressure
Pmn。
In addition, CPU 91 starts to be reached from stage portion D up to cloth pressing 71 jumps onto the timing for identifying stage portion D
Until needed for stage portion jump onto needle number T1 and reach from stage portion D until cloth pressing 71 is until reaching preceding withdrawing roll 21
It is preceding that stage portion is drawn to jump onto the counting for starting needle number T2.The counting of needle number is the defeated of the encoder 161 based on sewing machine electromotor 16
It carries out out.
Moreover, if jumping onto the cumulative of needle number T1 by stage portion identifies that cloth pressing 71 is fully jumped onto being stitched
The state (referring to c, Fig. 8 (C) of Fig. 7) of the stage portion D of object C processed, then preceding drawing motor 25 is decelerated to than benchmark speed by CPU 91
Spend the second setting speed Vs2 that Vsn is fast, slower than the first setting speed Vs1.
In addition, carry out rising control to roller elevating motor 24 so that preceding withdrawing roll 21 become it is higher than reference pressure Psn,
The second setting pressure Ps2 lower than the first setting pressure Ps1.
In addition, presser foot motor 73 carries out the control for declining sleeve 725, so that cloth pressing 71 becomes than base pressure
The first setting pressure Pm1 of power Pmn high.
In addition, CPU 91 starts until cloth pressing 71 passes through identifying that cloth pressing 71 jumps onto the timing of stage portion D
Stage portion needed for until crossing stage portion D sews the counting of needle number T3.
In addition, cloth pressing 71 is jumped onto relative to the stage portion D of sewn object C, needle can not be jumped onto according to stage portion
Number T1's is cumulative, but is determined according to the value of the detection thickness obtained by fabric thickness sensor 762 or its increment rate etc..
Next, if sewing the cumulative of needle number T3 by stage portion identifies that cloth pressing 71 have passed through sewn object
The stage portion D (referring to d, Fig. 8 (D) of Fig. 7) of C, then CPU 91 makes sewing machine electromotor 16 be accelerated the speed on the basis of restoring
Spend Vmn.
In addition, being slowed down so that preceding drawing motor 25 reverts to reference speed Vsn.
In addition, rising control is carried out to roller elevating motor 24, so that preceding withdrawing roll 21 reverts to reference pressure Psn.
In addition, presser foot motor 73 carries out the control for increase sleeve 725, so that cloth pressing 71 reverts to reference pressure
Pmn。
In addition, process of the cloth pressing 71 relative to the stage portion D of sewn object C, senses not according to by fabric thickness
The detection that device 762 carries out, but the cumulative of needle number T3 is sewed according to stage portion and is determined, therefore due to sewn object C's
Fluctuation, it is actual by being possible to deviation slightly occur with timing.Therefore, by fabric thickness sensor 762, until than being regarded as
Until the low value of the threshold value of stage portion D above-mentioned is detected (e of reference Fig. 7), do not implement to make by presser foot motor 73
The height of sleeve 725 follows the control (pressure in the section a-c of Fig. 7 of the detection thickness obtained by fabric thickness sensor 762
The control of foot motor 73).
For example, in order to avoid stage portion sewing needle number T3 it is cumulative when cloth pressing 71 be not over by stage portion D
Movement, but cloth pressing 71 excessively rises and the reduction of cloth pressing force occurs.
In addition, process of the cloth pressing 71 relative to the stage portion D of sewn object C, can not be and sewed according to stage portion
Needle number T3's is cumulative, but is determined compared with the detection thickness obtained by fabric thickness sensor 762 according to threshold value.
Then, for the flat part of sewn object C, the control of CPU 91 is by sewing machine electromotor 16 and preceding drawing motor 25
It is driven respectively with reference speed Vmn, Vsn above-mentioned, the maintenance of presser foot motor 73 makes cloth pressing 71 become reference pressure
Shaft angle degree, the roller elevating motor 24 of Pmn maintains withdrawing roll 21 before making to become the shaft angle degree of reference pressure Psn and sewed.
Moreover, if jumping onto the cumulative stage portion D for identifying sewn object C for starting needle number T2 by preceding drawing stage portion
Withdrawing roll 21 (referring to f, Fig. 9 (E) of Fig. 7) before reaching, then CPU 91 by preceding drawings motor 25 accelerate to than reference speed Vsn fastly,
The third setting speed Vs3 slower than the second setting speed Vs2.
In addition, rising control is carried out to roller elevating motor 24, so that preceding withdrawing roll 21 becomes lower than reference pressure Psn
Third sets pressure Ps3.
In addition, reaching the timing of preceding withdrawing roll 21 in the stage portion D of sewn object C, CPU 91 will be straight after stage portion D arrival
The counting that preceding drawing stage portion needed for until preceding withdrawing roll 21 jumps onto jumps onto needle number T4 starts.
Next, if jumping onto the cumulative of needle number T4 by preceding drawing stage portion identifies that preceding withdrawing roll 21 jumps onto sewn object
The stage portion D (referring to the g of Fig. 7) of C, then draw motor 25 to slow down to revert to reference speed Vsn before CPU 91 makes.
In addition, decline control is carried out to roller elevating motor 24, so that preceding withdrawing roll 21 reverts to reference pressure Psn.
Moreover, if detecting that the terminal part Ce of sewn object C reaches 71 (reference of cloth pressing by cloth end sensor 77
H, Fig. 9 (F) of Fig. 7), then sewing machine electromotor 16 is decelerated to slower than reference speed Vmn and the first setting speed Vm1 by CPU 91
The second setting speed Vm2.
In addition, preceding drawing motor 25 is accelerated to first setting speed faster than reference speed Vsn above-mentioned by CPU 91
Vs1。
In addition, decline control is carried out to roller elevating motor 24, so that preceding withdrawing roll 21 becomes than reference pressure above-mentioned
The first setting pressure Ps1 of Psn high.
On the other hand, the reduction about presser foot motor 73, with the detection thickness obtained by fabric thickness sensor 762
The control for declining sleeve 725 is matchingly carried out, is adjusted so that pressing force maintains constant value i.e. reference pressure
Pmn。
In addition, sewing machine 100 is to send out the double ring seam sewing machine of wrist type, so if the terminal part Ce of sewn object C is arrived
Up to cloth pressing 71 and pass through, then until from the terminal part Ce of sewn object C to the front end Cs of next sewn object C it
Between, form the idle loop K being only made of online and looper line knotting.
Moreover, if detecting that the front end Cs of next sewn object C reaches cloth pressing by cloth end sensor 77
71 (referring to i, Fig. 9 (G) of Fig. 7), then sewing machine electromotor 16 is accelerated to, ratio first slower than reference speed Vmn and set by CPU 91
Constant speed degree Vm1 and the second setting speed Vm2 fast third setting speed Vm3.
In addition, presser foot motor 73 carries out the control for declining sleeve 725, so that cloth pressing 71 becomes than base pressure
The second setting pressure Pm2 of the setting of power Pmn and first pressure Pm1 high.
Hereafter, preceding withdrawing roll 21 makes the terminal part Ce of leading sewn object C pass through and become the state to connect with idle loop K,
Therefore being contemplated to is reduced by the conveying capacity that preceding withdrawing roll 21 generates, thus improve the pressing force generated by cloth pressing 71,
Improve the conveying capacity of the sewn object C generated by feeding tooth.
In addition, the timing of cloth pressing 71 is reached in the front end Cs of next sewn object C, before CPU 91 starts cloth
End sewing commencing speed change needle number T5 counting, the cloth front end sewing commencing speed change needle number T5 define make with than
During continuing for the reference speed Vmn of the front end Cs of the sewn object C slow third setting speed Vm3 conveying carried out.
In addition, granny rag material front end jumps onto the counting for starting needle number T6 before also starting simultaneously, which is jumped onto out
Beginning needle number T6 is the needle number from the front end Cs of sewn object C reaches cloth pressing 71 before reaching until withdrawing roll 21.
Moreover, identifying next sewn object C if jumping by preceding granny rag material front end and starting the cumulative of needle number T6
Front end Cs reach before withdrawing roll 21 (referring to j, Fig. 9 (H) of Fig. 7), then preceding drawing motor 25 is decelerated to by CPU 91 compares benchmark
The second speed Vsn fast, slower than the first setting speed Vs1 setting speed Vs2.
In addition, rising control is carried out to roller elevating motor 24, so that preceding withdrawing roll 21 becomes lower than reference pressure Psn
Third sets pressure Ps3.
In addition, the timing of preceding withdrawing roll 21 is reached in the front end Cs of next sewn object C, granny rag material before CPU 91 starts
Front end jumps onto the counting of needle number T7, which jumps onto withdrawing roll 21 before needle number T7 is defined and jump onto next and stitched
During needed for the front end Cs of object C processed.
Moreover, CPU91 is by sewing machine electromotor 16 if cloth front end sewing commencing speed change needle number T5 is cumulatively added
Accelerate to reference speed Vmn.
Also, if jumping onto the cumulative of needle number T7 by preceding granny rag material front end identifies that preceding withdrawing roll 21 is stitched to next
The front end Cs of object C processed is jumped onto, (referring to the k of Fig. 7), if CPU 91 is identified (referring to j, Fig. 9 (H) of Fig. 7), CPU 91
Motor 25 is drawn to slow down to revert to reference speed Vsn before making.
In addition, rising control is carried out to roller elevating motor 24, so that preceding withdrawing roll 21 reverts to reference pressure Psn.
In addition, presser foot motor 73 carries out the control for increase sleeve 725, so that cloth pressing 71 reverts to reference pressure
Pmn。
Moreover, hereafter, the control in the section a-k for repeating Fig. 7 for next sewn object C.
[effect involved in embodiment]
The thickness of the control device 90 of above-mentioned sewing machine 100 and the sewn object C detected by fabric thickness sensor 762
Degree variation correspondingly, has been carried out to the revolving speed for the preceding withdrawing roll 21 realized by preceding drawing motor 25 and by roller elevating motor 24
The control that adjusting is changed by Compressive Strength for the preceding withdrawing roll 21 realized, therefore can be for the stage portion of sewn object C etc.
Thickness variation and carry out it is good before draw conveying, inhibit the spacing as caused by stage portion accumulation.
More specifically, the control device 90 of above-mentioned sewing machine 100 is known in the detection by fabric thickness sensor 762
Not Chu sewn object C stage portion D reach cloth pressing 71 in the case where, carried out before being realized by preceding drawing motor 25
The revolving speed of withdrawing roll 21 is set as the control (b of Fig. 7) of the first setting speed Vs1 faster than reference speed Vsn.
In addition, control device 90 is carried out in the case where the stage portion D for identifying sewn object C reaches cloth pressing 71
The setting by Compressive Strength (preceding drawing is by Compressive Strength) for sewn object C for the preceding withdrawing roll 21 that roller elevating motor 24 is realized will be passed through
For the control (b of Fig. 7) of the first setting pressure Ps1 higher than reference pressure Psn.
It is in the case where the stage portion D of sewn object C is transported to cloth pressing 71 by these respective controls
It crosses stage portion D and makes up the reduction of the conveying capacity generated by feeding tooth by the revolving speed increase of preceding withdrawing roll 21, before improving
Withdrawing roll 21 can further assign conveying capacity by Compressive Strength.
Therefore, it in the case where sewn object C has stage portion D, also can suitably convey, it can be to sewing spacing
Accumulation is inhibited, and the high sewing of quality of sewing is carried out.
In addition, the feelings of the control device 90 of sewing machine 100 withdrawing roll 21 before the stage portion D for identifying sewn object C is reached
Under condition, the third faster than reference speed Vsn will be set as by the revolving speed of the preceding preceding withdrawing roll 21 for drawing motor 25 to realize by, which having carried out, is set
The control (f of Fig. 7) of constant speed degree Vs3.
In addition, control device 90 carries out in the case where withdrawing roll 21 before the stage portion D for identifying sewn object C is reached
By being set as by Compressive Strength than reference pressure Psn for sewn object C for the preceding withdrawing roll 21 realized by roller elevating motor 24
The control (f of Fig. 7) of low third setting pressure Ps3.
By these respective controls, in the case where withdrawing roll 21 before the stage portion D of sewn object C is transported to, in order to
It crosses stage portion D and makes up the reduction of the conveying capacity generated by preceding withdrawing roll 21 by its revolving speed increase, pass through withdrawing roll before reducing
21 by Compressive Strength can easily pass over stage portion D, also reduce the reduction of the conveying capacity as caused by stage portion D.
Therefore, it in the case where sewn object C has stage portion D, can further convey well, it can be between sewing
Away from accumulation inhibited, carry out the higher sewing of quality of sewing.
In addition, if the control device 90 of sewing machine 100 detects the terminal part of sewn object C by cloth end sensor 77
Ce has then carried out for the revolving speed of preceding withdrawing roll 21 generated being set as faster than reference speed Vsn first by preceding drawing motor 25 and has set
The control (h of Fig. 7) of constant speed degree Vs1.
If carried out in addition, control device 90 detects the terminal part Ce of sewn object C by cloth end sensor 77
The contact pressure for sewn object C for the preceding withdrawing roll 21 realized by roller elevating motor 24 is set as than reference pressure Psn
The control (h of Fig. 7) of the first high setting pressure Ps1.
If the terminal part Ce of sewn object C reaches cloth pressing 71, the idle loop K being made of online and looper line passes through
Between cloth pressing 71 and feeding tooth, it is greatly reduced by the conveying capacity that feeding tooth generates.
But by above-mentioned respective control, the conveying generated by feeding tooth is made up by the revolving speed increase of preceding withdrawing roll 21
The reduction of power can further assign conveying capacity by Compressive Strength by the preceding withdrawing roll 21 of raising.
It therefore, also can be appropriate by sewn object in the case where the terminal part Ce of sewn object C passes through cloth pressing 71
Ground conveying, can form well idle loop and be sewed.
In addition, the feelings of the control device 90 of sewing machine 100 withdrawing roll 21 before the front end Cs for identifying sewn object C is reached
Under condition, the revolving speed of preceding withdrawing roll 21 realized by preceding drawing motor 25 is set as faster than reference speed Vsn second and set
The control (j of Fig. 7) of constant speed degree Vs2.
In addition, control device 90 carries out in the case where withdrawing roll 21 before the front end Cs for identifying sewn object C is reached
By being set as by Compressive Strength than reference pressure Psn for sewn object C for the preceding withdrawing roll 21 realized by roller elevating motor 24
The control (j of Fig. 7) of low third setting pressure Ps3.
By these respective controls, in the case where withdrawing roll 21 before the front end Cs of sewn object C is transported to, in order to
Front end Cs is crossed, the reduction of the conveying capacity generated by preceding withdrawing roll 21 is made up by its revolving speed increase, passes through withdrawing roll before reducing
21 by Compressive Strength can easily pass over front end Cs, can also reduce the reduction of the conveying capacity as caused by the Cs of front end.
Therefore, sewn object C can also be conveyed well relative to front end Cs, can be carried out to the accumulation of sewing spacing
Inhibit, carries out the higher sewing of quality of sewing.
In addition, the control device 90 of sewing machine 100 is identifying that cloth pressing 71 jumps onto the stage portion D's of sewn object C
In the case of, it has carried out being set as comparing by the pressing force for sewn object C of the cloth pressing 71 generated by presser foot motor 73
The control (c of Fig. 7) of the first setting pressure Pm1 of reference pressure Pmn high.
Thereby, it is possible to one side make cloth pressing 71 steadily to the stage portion D of the sewn object C with thickness carry out by
Pressure is conveyed on one side, therefore in the case where sewn object C has stage portion D, also can steadily carry out quality of sewing height
Sewing.
In addition, if the control device 90 of sewing machine 100 detects the front end of sewn object C by cloth end sensor 77
Cs has then carried out being set as the pressing force for sewn object C for the cloth pressing 71 realized by presser foot motor 73 to compare base
The control (i of Fig. 7) of the second setting pressure Pm2 of quasi- pressure Pmn high.
As a result, before the front end Cs of sewn object C is not reached the case where withdrawing roll 21 or preceding withdrawing roll 21 is by pressing against idle loop
In the case where and in the case that the conveying capacity of withdrawing roll 21 reduces before having occurred, also can be improved the conveying generated by feeding tooth
Power steadily conveys sewn object C and carries out the high sewing of quality of sewing.
[other]
Above-mentioned sewing machine 100 exemplifies the double ring seam sewing machine of submitting wrist type of two needles, but the radical of suture needle can be set
It is more.In addition, sewing control shown in Fig. 7 is not limited to send out the double ring seam sewing machine of wrist type, can be applied to pass through
Feed all types of sewing machines of the conveying of tooth and preceding withdrawing roll progress sewn object.But nearby it is from the h to i in Fig. 7
Control between only is not suitable for not forming the sewing machine of idle loop suitable for forming the sewing of idle loop, therefore about the control.
In addition, fabric thickness test section, root can also be arranged in the earthing position relative to sewn object in preceding withdrawing roll 21
According to the detection of fabric thickness test section to the front end Cs, terminal part Ce, stage portion D of sewn object C relative to preceding withdrawing roll 21
It reaches, jump onto, by being judged.
In addition, sewing machine 100, which exemplifies, sends out the double ring seam sewing machine of wrist type, but the shape in sewing machine base portion and unlimited
Due to this, it may be said that the sewing machine of arbitrary shape.
In addition, preceding withdrawing roll mechanism 20 exemplifies the structure that preceding withdrawing roll 21 is directly contacted with sewn object and conveyed, but
It's not limited to that, for example, it is also possible to which withdrawing roll 21 conveys sewn object via conveyer belt before being configured to.
In addition, the fabric thickness of sewn object is thicker compared with flat part in stage portion D, correspondingly start to being sewn
The timing advance that object is pierced into then is being needled into being stitched so if withdrawing roll 21 acts before being made with the time identical with flat part
Preceding withdrawing roll 21 is moved in sewn object in the state of object processed, there are problems that needle bending.
Therefore, when cloth pressing 71 jumps onto the stage portion D of sewn object C and passes through, following controls can also be carried out,
That is, by the feed motion of the sewn object C realized by preceding withdrawing roll 21 with the flat part the case where compared with terminate in advance.
Claims (12)
1. a kind of sewing machine, includes
Cloth pressing presses sewn object from top；
Cloth feeding mechanism is conveyed sewn object to defined direction of feed by feeding tooth；
Preceding withdrawing roll, in the direction of feed downstream side compared with the cloth pressing by the sewn object to direction of feed downstream
Side conveying；And
Preceding drawing motor is the rotary driving source of the preceding withdrawing roll,
The sewing machine is characterized in that, comprising:
Fabric thickness sensor detects the thickness of the sewn object on needle plate；
Roller elevating motor, make the preceding withdrawing roll lifting and to the preceding withdrawing roll for the sewn object by Compressive Strength into
Row is adjusted；And
The preceding drawing motor and the roller elevating motor are individually controlled by control device,
The thickness change of the control device and the sewn object detected by the fabric thickness sensor correspondingly,
Revolving speed to the preceding withdrawing roll by drawing motor to realize before described and by the roller elevating motor realize it is described before
Withdrawing roll changes adjusting by Compressive Strength.
2. sewing machine according to claim 1, which is characterized in that
The control device identifies that the stage portion of the sewn object arrives in the detection by the fabric thickness sensor
In the case where the cloth pressing, following controls are carried out, that is, the preceding withdrawing roll that will be realized by the roller elevating motor
Be set as the pressure higher than reference pressure by Compressive Strength.
3. sewing machine according to claim 2, which is characterized in that
The control device identifies that the stage portion of sewn object reaches institute in the detection by the fabric thickness sensor
In the case where stating cloth pressing, following controls are carried out, that is, will pass through the revolving speed of the preceding preceding withdrawing roll for drawing motor to realize
It is set as the speed faster than reference speed.
4. sewing machine according to any one of claim 1 to 3, which is characterized in that
The control device carries out following controls in the case where the stage portion for identifying the sewn object reaches the preceding withdrawing roll
System, that is, the preceding withdrawing roll realized by the roller elevating motor is set as the pressure lower than reference pressure by Compressive Strength.
5. sewing machine according to claim 4, which is characterized in that
The control device carries out following controls in the case where the stage portion for identifying the sewn object reaches the preceding withdrawing roll
System, that is, the speed faster than reference speed will be set as by the revolving speed of the preceding preceding withdrawing roll for drawing motor to realize.
6. sewing machine according to any one of claim 1 to 5, which is characterized in that
The sewing machine is double ring seam sewing machine, is connected after sewing finishing with sewn object and forms idle loop,
There is cloth end sensor in the sewing machine, which carries out the front end of the sewn object and terminal part
Detection, to whether there is or not the sewn objects to detect at the pressing position of the cloth pressing,
If detecting the terminal part of the sewn object by the cloth end sensor, the control device carries out following
Control, that is, by the setting by Compressive Strength for the sewn object for the preceding withdrawing roll realized by the roller elevating motor
For the pressure higher than reference pressure.
7. sewing machine according to claim 6, which is characterized in that
If detecting the terminal part of the sewn object by the cloth end sensor, the control device carries out following
Control, that is, the speed faster than reference speed will be set as by the revolving speed of the preceding preceding withdrawing roll for drawing motor to realize.
8. sewing machine according to claim 6 or 7, which is characterized in that
The control device carries out following controls in the case where the front end for identifying the sewn object reaches the preceding withdrawing roll
System, that is, by being set as the sewn object by Compressive Strength for the preceding withdrawing roll realized by the roller elevating motor
The pressure lower than the reference pressure.
9. sewing machine according to claim 8, which is characterized in that
The control device carries out following controls in the case where the front end for identifying the sewn object reaches the preceding withdrawing roll
System, that is, the speed faster than reference speed will be set as by the revolving speed of the preceding preceding withdrawing roll for drawing motor to realize.
10. sewing machine according to any one of claims 6 to 9, which is characterized in that
With presser foot motor, which adjusts the pressing force for the sewn object of the cloth pressing
Section,
If detecting the front end of the sewn object by the cloth end sensor, the control device carries out following
Control, that is, be set as the pressing force for the sewn object for the cloth pressing realized by the presser foot motor
The pressure higher than reference pressure.
11. sewing machine according to any one of claim 1 to 10, which is characterized in that
With presser foot motor, which adjusts the pressing force for the sewn object of the cloth pressing
Section,
The control device carries out following in the case where identifying that the cloth pressing jumps onto the stage portion of the sewn object
Control, that is, be set as the pressing force for the sewn object for the cloth pressing realized by the presser foot motor
The pressure higher than reference pressure.
12. sewing machine according to claim 1 comprising:
Presser foot motor；
Foot-pressing bar keeps the cloth pressing in lower end；
Upper paraphysis clasps portion and lower paraphysis clasps portion, they are individually fixed in the upper and lower of the foot-pressing bar；
Sleeve is configured at the downside that the upper paraphysis clasps portion, can vertically slide relative to foot-pressing bar；
Presser feet spring, is configured at the sleeve and the lower paraphysis is clasped between portion；
Presser foot motor links via transmission mechanism with the sleeve；And
Cloth pressing mechanism, by the way that the sleeve is adjusted to arbitrary height using the presser foot motor, so as to
The pressing force for sewn object of cloth pressing is adjusted,
The control device carries out following in the case where identifying that the cloth pressing jumps onto the stage portion of the sewn object
Control, that is, the increase with the detection thickness obtained by the fabric thickness sensor is matchingly, electronic using the presser feet
Machine rises the sleeve, and pressing force is maintained constant.
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| JP2017-183351 | 2017-09-25 | ||
| JP2017183351A JP7365105B2 (en) | 2017-09-25 | 2017-09-25 | sewing machine |
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| CN110306303A (en) * | 2019-07-15 | 2019-10-08 | 杰克缝纫机股份有限公司 | Sewing machine method for adjusting rotation speed, device and computer equipment |
| CN112981758A (en) * | 2021-02-01 | 2021-06-18 | 刘玲锋 | Thread clamping device for embroidery machine and without thread off |
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| WO2023182953A1 (en) * | 2022-03-22 | 2023-09-28 | Yazici Di̇ki̇ş Maki̇na San.Ve Ti̇c.Ltd.Şti̇. | 90-degree automatic fabric thickness reading system |
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| CN110306303A (en) * | 2019-07-15 | 2019-10-08 | 杰克缝纫机股份有限公司 | Sewing machine method for adjusting rotation speed, device and computer equipment |
| CN110306303B (en) * | 2019-07-15 | 2021-09-07 | 杰克缝纫机股份有限公司 | Method and device for adjusting rotating speed of sewing machine and computer equipment |
| CN112981758A (en) * | 2021-02-01 | 2021-06-18 | 刘玲锋 | Thread clamping device for embroidery machine and without thread off |
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|---|---|
| CN109554838B (en) | 2022-11-18 |
| JP2019058230A (en) | 2019-04-18 |
| JP7365105B2 (en) | 2023-10-19 |
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