CN108411504A - Sewing machine - Google Patents
Sewing machine Download PDFInfo
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- CN108411504A CN108411504A CN201710073488.4A CN201710073488A CN108411504A CN 108411504 A CN108411504 A CN 108411504A CN 201710073488 A CN201710073488 A CN 201710073488A CN 108411504 A CN108411504 A CN 108411504A
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- cloth pressing
- pressing
- sewing machine
- height
- neutral
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/02—Presser-control devices
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
Cloth pressing can be adjusted to arbitrary height by the present invention.Have：Revolving periphery cam (20)；Driven member (31), abuts with the periphery of periphery cam；Carrier (32), is rotated via driven member, and lifting action is transferred to cloth pressing (11)；Presser foot motor (14) makes periphery cam rotate；And control device (90), presser foot motor is controlled, the lifting action of cloth pressing is controlled.Abutted position by using presser foot motor to driven member relative to periphery cam is arbitrarily adjusted, so as to arbitrarily adjust the height of cloth pressing (11).In addition, due to not using solenoid, but moving up and down for cloth pressing (11) is carried out by presser foot motor, therefore noise, the loss of the component caused by colliding, damage can be reduced.
Description
Technical field
The present invention relates to the sewing machines with the presser feet lifting mechanism for making cloth pressing lifting.
Background technology
Existing sewing machine has presser feet lifting mechanism, which is made of components described below：Foot-pressing bar, it is right
Cloth pressing is kept；Presser feet spring applies foot pressure downwards via foot-pressing bar to cloth pressing；Bar,
It fights presser feet spring and vertical motion is applied to foot-pressing bar；And solenoid, bar is applied via multiple gonnecting rod bodies and is risen
Action.
Moreover, when making cloth pressing decline, solenoid is not driven or thrust is set as minimum limit and passes through presser feet
The movement that the spring pressure of spring carries out cloth pressing carries out solenoid-activated to lift dynamic when making cloth pressing rise
Make (for example, referring to patent document 1).
Patent document 1：Japanese Unexamined Patent Publication 2011-092523 bulletins
But in above-mentioned existing sewing machine, solenoid is used as the vertical motion driving source of cloth pressing, because
This height for being difficult to arbitrarily to cloth pressing controls.In addition, the lifting about the cloth pressing realized by solenoid
It acts, the collision between component is fierce, there is the problems such as loss for easy ting produce noise, easy ting produce component, damage.
Also, in the case where solenoid to be set as to the driving source of lifting action of cloth pressing, in the upper of cloth pressing
The problem of having to last for supplying electric power and maintaining the movement of cloth pressing during rising, therefore becoming larger there is also electric power consumption.
Invention content
The purpose of the present invention is to provide a kind of sewing machine for the lifting action that can carry out more good cloth pressing, tools
There are the arbitrary characteristics of following (1)~(7).
(1)
A kind of sewing machine, which is characterized in that have：
Revolving periphery cam；
Driven member is abutted with the periphery of the periphery cam；
Carrier, is rotated via the driven member, and lifting action is transferred to cloth pressing；
Presser foot motor makes the periphery cam rotate；And
Control device controls the presser foot motor, controls the lifting action of the cloth pressing.
(2)
Above-mentioned (1) record sewing machine be characterized in that,
Have operating unit, which is operated by inputting and indicates to input the height of the cloth pressing,
The control device controls the presser foot motor, so that the cloth pressing becomes and the operation
The corresponding height of input operating quantity of unit.
(3)
Above-mentioned (1) record sewing machine be characterized in that,
The periphery cam has among one week there are three neutral section and three constant intervals, this three neutral sections with
Pressing position, centre position, presser feet cocked position this third gear the height of the cloth pressing correspond to respectively, outer diameter is respectively permanent
Fixed, which is set between these three neutral sections, and the outer diameter variation of each constant interval is, from outer diameter
The outer diameter in one neutral section in the neutral section of different both sides, which rises, is gradually converted to another neutrality
The outer diameter in section.
(4)
Above-mentioned (3) record sewing machine be characterized in that,
Have operating unit, which is operated by inputting and indicates to input the height of the cloth pressing,
The control device controls the presser foot motor, so that the cloth pressing and the operating unit
Input operation correspondingly become the pressing position, the centre position, any one of the presser feet cocked position
Highly.
(5)
Above-mentioned (3) record sewing machine be characterized in that,
Have operating unit, which is operated by inputting and indicates to input the height of the cloth pressing,
The control device executes Linear Control, that is, controls the presser foot motor, so that the cloth pressure
Foot becomes height corresponding with the input operating quantity of the operating unit.
(6)
Above-mentioned (5) record sewing machine be characterized in that,
The periphery cam has：
The first neutral section, the second neutral section as described three neutral sections and third neutrality section；And
As the first constant interval, the second constant interval and the third constant interval of three constant intervals,
The control device controls the presser foot motor, so that selectively being held as the Linear Control
The first Linear Control in range of the row until from the pressing position to the centre position and from the pressing position to institute
Any one of the second Linear Control in the range until presser feet cocked position is stated, also,
In first Linear Control, in corresponding with the pressing position described the first of the periphery cam
First constant interval between vertical section and the described second neutral section corresponding with the centre position,
In second Linear Control, in corresponding with the pressing position described the first of the periphery cam
The vertical third constant interval between section and third neutrality section corresponding with the presser feet cocked position.
(7)
Any one of above-mentioned (1) to (6) record sewing machine be characterized in that,
The carrier is transferred to the cloth by the rotation to the rotation center side of the periphery cam, by lowering action
Expect presser feet,
The sewing machine has adjusting unit, which passes through the rotation to the periphery cam to the carrier
Central side is adjusted close to extreme position, to determine the lower position of the cloth pressing.
The effect of invention
The sewing machine of the present invention has periphery cam and presser foot motor, and have makes periphery cam revolve by presser foot motor
Then to the control device that the lifting action of cloth pressing is controlled, therefore easily cloth pressing can be adjusted to arbitrarily
Height, accordingly, the height for carrying out cloth pressing is adjusted involved various requirement with sewing.
In addition, moving up and down for cloth pressing is carried out by periphery cam and presser foot motor, it therefore, will not be such as by helical
Pipe be set as the case where driving source generated like that because of the movement of the component between two positions collision, work sound, can realize mute
Change, and reduces the generation of the loss of component, damage.
In addition, due to carrying out moving up and down for cloth pressing, the cam face of cam in periphery using periphery cam
A part be provided at a distance of rotation center be isometrical section in the case of, even if by the power supply of presser foot motor supply subtract
Less or stop, driven member can be also held in constant position, therefore moving up and down for cloth pressing can be carried out, realizes and make
For the reduction of the electric power consumption of project.
Description of the drawings
Fig. 1 is the front view for the integrally-built configuration for indicating the presser feet lifting mechanism in sewing machine stand.
Fig. 2 is the oblique view of the structure on presser foot motor periphery.
Fig. 3 is the side view of the structure of periphery cam and surrounding.
Fig. 4 is the block diagram of the control system of sewing machine.
Fig. 5 be the preceding entering amount about operating pedal, rear entering amount and input operation distribution between relationship and indicate
Definition graph.
Fig. 6 is the flow chart for the action control for indicating presser feet lifting mechanism.
Fig. 7 is the structure chart for indicating to be attached with the adjusting unit that small presser feet lifts in presser feet lifting mechanism.
The explanation of label
10 presser feet lifting mechanisms
11 cloth pressings
14 presser foot motors
15 Support brackets
16 sewing machine electromotors
17 thread cutters
18 operating pedals
20 periphery cams
21,22,23 neutral section
24,25,26 constant interval
30 transmission mechanisms
31 rollers (driven member)
32 drive connecting rods (carrier)
40 adjust unit
42 adjusting screws
90 control devices
100 sewing machine stands
Specific implementation mode
[outline of the embodiment of invention]
In the following, with reference to attached drawing, sewing machine according to the present invention is illustrated.Fig. 1 is the seam for indicating sewing machine and having
The side view of the integrally-built configuration of presser feet lifting mechanism 10 in rack of threading 100 and the sewing machine stand 100.
In addition, the sewing machine of present embodiment is so-called sewing machine for covering chain stitch, mainly to the characteristic as the present invention
The presser feet lifting mechanism 10 of sewing machine illustrate, move up and down machine about suture needle possessed by common sewing machine for covering chain stitch
Structure, cloth feeding mechanism, container mechanism, line adjuster device, Libra mechanism, thread cutter, due to having and well known structure phase
Same structure, therefore the description thereof will be omitted.
In addition, in the following description, by horizontal direction and the length of base portion 101 along sewing machine stand 100 shown in FIG. 1
The direction in degree direction is set as Y direction, and by horizontal direction and the direction orthogonal with Y direction is set as X-direction, above and below vertical
Direction is set as Z-direction.In addition, as needed, as shown in Figure 1, the side in Y direction is set as " preceding ", another party is set
For " rear ", the side (the paper distal side of Fig. 1) in X-direction is set as " left side ", another party (the paper proximal lateral of Fig. 1) is set
For " right side ".
Sewing machine stand 100 is made of components described below：Sewing machine base portion 101 extends in sewing machine lower part；Longitudinal body
Portion 102 is uprightly arranged from the rear end in the sewing machine base portion 101；And sewing machine arm 103, from the longitudinal direction body
The upper end in portion 102 is stretched out forwards.
The front end in sewing machine base portion 101 becomes needle downing position, and surface is equipped with needle plate 104 on it.In addition, omitting
The needle bar of diagram is supported in the left part of sewing machine arm 103 with the state that can move up and down along Z-direction.
[outline structure of presser feet lifting mechanism]
Presser feet lifting mechanism 10 has：Cloth pressing 11；Foot-pressing bar 12 protects cloth pressing 11 in lower end
It holds；Revolving periphery cam 20；Transmission mechanism 30 transmits lifting action from periphery cam 20 to cloth pressing 11；And
Presser foot motor 14 makes periphery cam 20 rotate, the action control of presser foot motor 14 by the overall structure to sewing machine into
Row control control device 90 and carry out.
[cloth pressing and foot-pressing bar]
Cloth pressing 11 is the so-called ship shape that bottom surface is smooth and cloth direction of feed upstream side (front side) tilts upward
Presser feet.
Foot-pressing bar 12 by sewing machine arm 103 along the state of Z-direction can be supported on needle bar up or down
Near.
There is needle bar to clasp portion 13 in the upper end fixed equipment of foot-pressing bar 12.It is clasped via needle bar the upper end of foot-pressing bar 12
Portion 13 and not shown presser feet spring presses downwards, therefore ensure that foot pressure.
In addition, needle bar clasps the protrusion 131 that portion 13 has the flat column stretched out to the right, the protrusion 131 with describe below
It is hook-shaped lift the locking of plate 35, be applied in upward lift power.
[transmission mechanism]
Transmission mechanism 30 has：As the roller 31 of driven member, abutted with the periphery of periphery cam 20；As carrier
Drive connecting rod 32, roller 31 is supported；Follower link 33 links with the drive connecting rod 32；Connecting rod 34, will
Drive connecting rod 32 links with follower link 33；And plate 35 is lifted, link with follower link 33, and portion is clasped via needle bar
13 and foot-pressing bar 12 and cloth pressing 11 are lifted.
Roller 31 is configured to, and can rotatably be supported by drive connecting rod 32 around X-axis, the top with the periphery of periphery cam 20
It abuts.
Drive connecting rod 32 is so-called crank, and sewing machine stand 100 is supported in capable of turning about the X axis using ladder screw as axis
It is interior.The drive connecting rod 32 has two wrists in two directions towards half radial outside centered on ladder screw.One
Wrist backward stretch out obliquely downward by side, and is supported to roller 31 in its front end, another wrist forward stretch out obliquely downward by side, and
And the one end of connecting rod 34 links in which can turn about the X axis with another wrist.
Follower link 33 is so-called crank, can turn about the X axis in sewing machine stand 100 not shown support shaft
Support.The follower link 33 has two wrists in two directions towards half radial outside centered on support shaft.One
Wrist to front side stretch out, and its front end can turn about the X axis with lift plate 35 upper end link, another wrist to
Upside is stretched out, and the other end of connecting rod 34 links in which can turn about the X axis with another wrist.
As described above, cloth pressing 11 and foot-pressing bar 12 are pressed downwards by presser feet spring, and follower link 33 passes through as a result,
By lifting plate 35 by the clockwise rotatory force in Fig. 1.Also, drive connecting rod 32 is applied in inverse via connecting rod 34
Conterclockwise rotatory force, roller 31 are crimped with the periphery of periphery cam 20.
[presser foot motor]
Presser foot motor 14 is supported in longitudinal body portion 102 with parallel with the X-direction and state towards left of output shaft
It is interior, the Support bracket 15 being supported to periphery cam 20 is housed in the left group of presser foot motor 14.
Support bracket 15 as shown in Fig. 2, be made of a pair of of carrier frame plate 151,152 and three pillars 153, the carrier frame plate 151,
152 configurations are in the left and right sides of periphery cam 20, and three pillars 153 between these carrier frame plates 151,152 in order to outside being inserted into
All cams 20 and with the state of interval into joining line.Moreover, the carrier frame plate 152 on right side is fixed on presser foot motor 14.
In addition, presser foot motor 14 can be supported rotatably by both carrier frame plates 151,152, electricity (not shown) can be reduced
The load of motivation bearing.
In addition, above-mentioned presser foot motor 14, periphery cam 20, Support bracket 15 have presser feet electronic with the formation described below
The integrally blocking of the circuit board of the driving circuit 142 of machine 14.
It is directed to the existing sewing machine for not having presser foot motor 14 and periphery cam 20 as a result, can be easily installed
Said units can easily transform the sewing machine for the height control that cloth pressing 11 is carried out by presser foot motor 14 as.
[periphery cam]
The cam 20 in periphery is crimped with the roller 31 for being supported in drive connecting rod 32 as described above, thus can by from
The variation of distance (hereinafter, referred to as displacement) until the rotation center to periphery of periphery cam 20 and make drive connecting rod 32 rotate.
In the case of the structure of transmission mechanism 30 above-mentioned, if the displacement of periphery cam 20 is small, cloth pressing 11 declines, if
The displacement of periphery cam 20 is big, then cloth pressing 11 rises.
Moreover, periphery cam 20 as shown in figure 3, have among one week the 21, second neutral section 22 of the first neutral section,
Third neutrality section 23 and the first constant interval 24, the second constant interval 25, third constant interval 26, first neutral zone
Between the 21, second neutral section 22, third neutrality section 23 be with " pressing position ", " centre position ", " presser feet cocked position " this
The corresponding three neutral sections of the height of the cloth pressing 11 of third gear, first constant interval 24, the second constant interval 25,
Third constant interval 26 is disposed on three between the 21, second neutral section 22 of the first neutral section, third neutrality section 23
Constant interval.
Above-mentioned " pressing position " be cloth pressing 11 reach needle plate 104, the sewn object on needle plate 104 can be carried out by
The height of pressure is the position lower than " centre position " and " presser feet cocked position ".
Above-mentioned " neutral position " is cloth pressing 11 from the height after needle plate 104 upward a little separation, be for example in order to
Be changed in the state that suture needle is pierced into sewn object towards etc. in the case of operations, the pressure that will be generated by cloth pressing 11
The height of foot pressure releases.It is in the height between " pressing position " and " presser feet cocked position " to be somebody's turn to do " centre position ".
Above-mentioned " presser feet cocked position " be cloth pressing 11 from needle plate 104 be sufficiently separated upward after height, be example
Such as in order not to interfering the height for removing, replacing operation and cloth pressing 11 being made to keep out of the way of the sewn object after sewing finishing.It should
" presser feet cocked position " is the position higher than " pressing position " and " centre position ".
Above-mentioned first the 21, second neutral section 22 of neutral section, third neutrality section 23 are all formed as the displacement of its periphery
It is constant.Moreover, the displacement in the corresponding with " pressing position " first neutral section 21 is minimum, in corresponding with " centre position " second
The displacement second in vertical section 22 is small, maximum with the displacement in " presser feet cocked position " corresponding third neutrality section 23.
In addition, as shown in figure 3, the second neutral section 22 is located at counter clockwise direction, third relative to the first neutral section 21
Neutral section 23 is located at clockwise relative to the first neutral section 21.
Furthermore it is preferred that than three constant intervals 24,25,26 of angular amplitude in three neutral sections 21,22,23 are narrow.But
At least preferably have in the state of stopping the driving of presser foot motor 14, be able to maintain that roller 31 and each neutral section 21,
22, the amplitude of this degree of the state that 23 periphery abuts.
Three constant intervals 24,25,26 are respectively arranged between three neutral sections 21,22,23.
Moreover, the outer diameter variation of the first constant interval 24 is, the is gradually converted to from the outer diameter in the first neutral section 21
The outer diameter in two neutral sections 22.
In addition, the outer diameter variation of the second constant interval 25 is, the is gradually converted to from the outer diameter in the second neutral section 22
The outer diameter in three neutral sections 23.
In addition, the outer diameter variation of third constant interval 26 is gradually to be converted to the from the outer diameter in third neutrality section 23
The outer diameter in one neutral section 21.
In addition, as shown in figure 3, the second constant interval 25 is located at counter clockwise direction, third relative to the first constant interval 24
Constant interval 26 is located at clockwise relative to the first constant interval 24.
[control system of sewing machine]
Fig. 4 shows the block diagram for having the control system of the sewing machine of presser feet lifting mechanism 10.
Sewing machine has the control device 90 for the action control for carrying out its structure, in the control device 90 via each driving
Circuit 142,162 and be connected with：As the driving source of the lifting action of cloth pressing 11 presser foot motor 14 and it is exported
The encoder 141 that shaft angle degree is detected；And as sewing action driving source sewing machine electromotor 16 and it is exported
The encoder 161 that shaft angle degree is detected.
In addition, being connected in control device 90：It will reach the standard grade in sewing finishing and the thread cutter of offline cut-out 17；And
Pedal sensor 181 is detected the operating quantity from operating pedal 18, and the operating pedal 18 is as operator for seam
Machine of threading carries out the operating unit of operation input.
Control device 90 has：CPU 91 carries out the control and operation in each portion of the presser feet lifting mechanism 10 of sewing machine
Processing；RAM 92 becomes the operating area of CPU 91；ROM 93 stores the program handled by CPU 91；And
As the EEPROM 94 of storage part, data of the storage for calculation process are consisted of, and can change to the data
It writes.
Fig. 5 is preceding entering amount (the clockwise rotational angle in Fig. 5), the rear entering amount about operating pedal 18
The definition graph that relationship between (the anticlockwise rotational angle in Fig. 5) and the distribution of input operation is indicated.
The angle of inclination indicated by solid line in Fig. 5 is set as neutral position by operating pedal 18, is not grasped in operator
Spring pressure is applied in the state of work, so that restoring to the neutral position.
Moreover, neutral position is set as 0 by pedal sensor 181, the maximum entering amount in former riding is set as Pf, it will be in post legged
Maximum entering amount be set as Pe and exported.The limit position entered into physically of these maximum entering amount and operating pedal 18
It sets consistent.In addition, in former riding and post legged, the polarity for the detected value that pedal sensor 181 exports is mutually opposing.
Moreover, control device 90 is in the range of the former riding until 0~Pf of entering amount of operating pedal 18, sewing is electromechanical
Motivation 16 drives and is sewed.In addition, in the range of 0~Pf of the entering amount, it is electromechanical that sewing is correspondingly carried out with entering amount
The speed control of motivation 16.
In addition, control device 90 sewing midway detect entering amount 0 (neutral position) of operating pedal 18 in the case of,
Carry out the control that position makes sewing machine electromotor 16 stop (in the state that suture needle is pierced into sewn object) under needle bar.
Also, in the range of pedal sensor 181 is neutral position and former riding, control device 90 carries out following controls,
That is, cloth pressing 11 is set as to drop to the state of pressing position.
On the other hand, control device 90 for operating pedal 18 post legged, according to whether being described below " in sewing
On the way ", the action of execution is different.
That is, in the state that sewing machine is in sewing midway, entering amount of the control device 90 in the post legged of operating pedal 18
In range more than 0 less than Pn, the height control of cloth pressing corresponding with entering amount 11 is executed, if entering amount is more than
Or be equal to Pn, then execute the tangent line carried out by thread cutter 17.
In addition, in the case where sewing machine is not at sewing midway, control device 90 is stepped in the post legged of operating pedal 18
Enter entire scope of the amount more than 0 and until Pe, executes the height control of cloth pressing corresponding with entering amount 11.
In addition, carried out by control device 90, sewing machine whether the judgement in sewing midway, be electromechanical according to sewing
The driving resume of motivation 16 and the execution resume of the thread cutting action of thread cutter 17 and carry out.
That is, after the main power source of sewing machine is connected, it is judged as " non-seam until the driving for carrying out sewing machine electromotor 16
Midway state processed ", if even if becoming " sewing midway shape if having carried out the driving of sewing machine electromotor 16, only rotated a circle
State ".Then, if performing tangent line, " sewing midway state " is released from and becomes " non-sewing midway state ", if carried out
Even if the driving of sewing machine electromotor 16 becomes " sewing midway state " if only rotate a circle.Then, until main power source is disconnected
Until opening, similarly judged by control device 90.
[action control of presser feet lifting mechanism]
Flow chart based on Fig. 6 is explained in detail and is lifted with presser feet by what the CPU 91 of above-mentioned control device 90 was realized
The action control of sewing machine based on mechanism 10.
First, if the main power source of sewing machine is connected, whether the CPU 91 of control device 90 judges sewing machine in seam
Midway state (step S1) processed.As described above, CPU 91 is according to the driving resume and thread cutter 17 of sewing machine electromotor 16
Execution resume judged.
Specifically, completely without the driving of progress sewing machine electromotor 16 after main power source connection or after execution tangent line
In the case of, it is judged as " non-sewing midway state " (step S1：NO), CPU 91 by the entering amount 0 of the post legged of operating pedal 18~
Entire scope until Pe is assigned as the height control of cloth pressing 11.At this point, become " pressing position " at entering amount 0,
Become " presser feet cocked position " at entering amount Pe, between these positions, proportionally making cloth to correspond to entering amount
The mode of the height increase and decrease of presser feet 11 is allocated.
Moreover, CPU 91 is based on above-mentioned distribution, cloth corresponding with the entering amount Pb that pedal sensor 181 detects is found out
The height for expecting presser feet 11, controls the rotation of presser foot motor 14, to become the height (step S19).
Then, the process returns to step S1.
In addition, the height adjusting control of above-mentioned steps S19 is equivalent to " the second Linear Control ".In the second Linear Control,
With pedal operation correspondingly, arbitrary to the height of cloth pressing 11 from " pressing position " to the range of " presser feet cocked position "
And linearly controlled, therefore, CPU 91 controls presser foot motor 14, so that roller 31 and periphery cam 20
Third constant interval 26 abuts.
On the other hand, whether it is in the judgement of sewing midway about sewing machine, after main power source connection or execution is cut
Even if being judged as " sewing midway state " if in the case of having carried out the driving of sewing machine electromotor 16 after line, only having rotated a circle
(step S1：YES), the range assignment of 0~Pn of entering amount of the post legged of operating pedal 18 is the height of cloth pressing 11 by CPU 91
Degree control, is executing instruction for the tangent line carried out by thread cutter 17 by the range assignment more than entering amount Pn.
Also, CPU 91 is based on above-mentioned distribution, and whether 0 ＜ Pb are in the entering amount Pb that pedal sensor 181 detects
Judged (step S3) in the range of≤Pn.
Moreover, (step S3 in the case of in the range of entering amount Pb is in 0 ＜ Pb≤Pn：YES), electromechanical according to sewing
The detection signal of the encoder 161 of motivation 16, whether the front end to current suture needle is the needle being located under needle plate upper surface
Position is judged (step S5) under stick.
In above-mentioned judgement, (step S5 in the case of position under being determined as needle bar：YES), CPU 91 is at entering amount 0
It distributes " pressing position ", " centre position " is distributed at entering amount Pn, the entering amount between these positions is stepped on corresponding to
The mode for entering amount and proportionally increasing and decreasing the height of cloth pressing 11 is allocated.Moreover, being based on above-mentioned distribution, finds out and step on
The height of the corresponding cloth pressing of entering amount Pb that plate sensor 181 detects 11, carries out the rotation of presser foot motor 14
Control, to become the height (step S7).
Then, the process returns to step S1.
In addition, the height adjusting control of above-mentioned steps S7 is equivalent to " the first Linear Control ".In the first Linear Control, with
Pedal operation correspondingly, arbitrary to the height of cloth pressing 11 and linear from " pressing position " to the range in " centre position "
Ground is controlled, and therefore, CPU 91 controls presser foot motor 14, so that roller 31 becomes with the first of periphery cam 20
Change section 24 to abut.
The meaning of the height control of cloth pressing 11 about above-mentioned steps S7, remarks additionally.
Step S7 is the range that 0 ＜ Pb≤Pn are in entering amount Pb of the sewing machine in sewing midway and pedal post legged
Interior and needle bar is located at needle bar bottom and is set to premise.Sewing machine is in sewing midway and indicates on needle plate there are sewn object,
It is currently executing sewing.
The entering amount Pb of pedal post legged indicates that the user of sewing machine wants to cloth pressure in the range of being in 0 ＜ Pb≤Pn
The height of foot 11 is adjusted.
It indicates to stop in the state that suture needle is pierced into sewn object in addition, needle bar is located at position under needle bar.
That is, in the case where reaching step S7, the user of sewing machine wants to stop sewing in sewing midway, in suture needle
So that cloth pressing 11 is increased upward compared with pressing position in the state of piercing, in general, indicate likely in want into
It is about to the situation of the operations such as the direction change of sewn object.
Therefore, in situations as mentioned above, control device 90 controls the height adjustment range of cloth pressing 11,
It enables to carry out Linear Control by operating pedal 18 in the range of until from " pressing position " to " centre position ", and
The height that cloth pressing 11 can be arbitrarily carried out in range appropriate is adjusted, without making cloth pressing 11 excessively rise.
On the other hand, in the judgement of step S5, in the case where it is not position under needle bar to be determined as, (step S5：NO),
CPU 91 distributes " pressing position " at entering amount 0, at entering amount Pn distribute " presser feet cocked position ", for these positions it
Between entering amount, by proportionally make corresponding to entering amount cloth pressing 11 height increase and decrease in a manner of be allocated.Moreover,
Based on above-mentioned distribution, the height of cloth pressing corresponding with the entering amount Pb that pedal sensor 181 detects 11 is found out, to pressure
The rotation of foot motor 14 is controlled, to become the height entering amount (step S9).
Then, the process returns to step S1.
In addition, the height adjusting control of above-mentioned steps S9 is equivalent to " the second Linear Control ".In the second Linear Control, with
Pedal operation correspondingly, arbitrary to the height of cloth pressing 11 from " pressing position " to the range of " presser feet cocked position " and
It is linearly controlled, therefore, CPU 91 controls presser foot motor 14, so that the of roller 31 and periphery cam 20
Three constant intervals 26 abut.
The meaning of the height control of cloth pressing 11 about above-mentioned steps S9, remarks additionally.
Step S9 is the range that 0 ＜ Pb≤Pn are in entering amount Pb of the sewing machine in sewing midway and pedal post legged
Interior and needle bar is not set to premise positioned at needle bar bottom.
That is, in the case where reaching step S9, the user of sewing machine wants to stop sewing in sewing midway, in suture needle
Cloth pressing 11 is set to increase upward compared with pressing position in the state of not being pierced into.In general, sewing is stopped in sewing midway
In the case of only, control device 90 is located under needle bar in a manner of position by needle bar into the control for exercising the stopping of sewing machine electromotor 16
System, but and be not limited to this, needle bar indicates very possible not under needle bar and artificially rotates belt wheel and make needle the case where position
Stick rises.To this it is contemplated that a variety of causes, but at least it is contemplated to：The case where making needle bar increase upward compared with position under needle bar
It is so that needle bar (suture needle) is kept out of the way since suture needle interferes operation.
Therefore, in situations as mentioned above, control device 90 controls the height adjustment range of cloth pressing 11,
It enables to linearly be controlled by operating pedal 18 in the range of until from " pressing position " to " presser feet cocked position "
System, and can arbitrarily carry out height adjusting in the range for making cloth pressing 11 just keep out of the way fully up.
In addition, in the judgement of step S3, in the range of being determined as that the entering amount Pb of pedal is not at 0 ＜ Pb≤Pn
In the case of (step S3：NO), whether it is that Pb ＞ Pn are judged (step S11) to the entering amount Pb of pedal.
Moreover, (the step S11 in the case where the entering amount Pb of pedal is Pb ＞ Pn：YES), it is judged as YES and executes tangent line
Instruction input, controls presser foot motor 14, so that cloth pressing 11 drops to pressing position (step S13), also, it is logical
It crosses thread cutter 17 and executes thread cutting action (step S15).
Then, the process returns to step S1.
On the other hand, in step s 11, (the step in the case where being determined as that the entering amount Pb of pedal is not Pb ＞ Pn
S11：NO), indicate that operating pedal 18 is in the range of neutral position or former riding (0≤Pb≤Pf), therefore, to presser foot motor
14 are controlled so that cloth pressing 11 drops to pressing position (step S17), by sewing machine electromotor 16 stop or with step on
Enter the corresponding speed of amount to be driven.
Then, the process returns to step S1.
[technique effect of the embodiment of invention]
Presser feet lifting mechanism 10 has：Periphery cam 20, as the roller 31 of driven member, as the drive connecting rod of carrier
32, presser foot motor 14, sewing machine have control device 90, which controls presser foot motor 14, to cloth
The lifting action of material presser feet 11 is controlled, therefore, it is possible to which cloth pressing 11 is easily adjusted to arbitrary height, Neng Gouyu
Accordingly, the height for carrying out cloth pressing 11 is adjusted the involved various requirement of sewing.
In addition, carry out moving up and down for cloth pressing 11 by periphery cam 20 and presser foot motor 14, therefore will not be as
The case where solenoid is set as driving source generates collision, work sound, Neng Goushi because of the movement of the component between two positions like that
Existing mute, and reduce the generation of the loss of component, damage.
In addition, above-mentioned sewing machine has the pedal as operating unit, which indicates input cloth by operation by inputting
Expect that the height of presser feet 11, control device 90 control presser foot motor 14, so that cloth pressing 11 becomes and pedal
The corresponding height of operating quantity is inputted, thus, for example even if can easily be done cloth pressing 11 if during sewing
Height is adjusted.
In addition, periphery cam 20 is among one week, have with pressing position, centre position, presser feet cocked position cloth
The corresponding three neutral sections 21,22,23 of the height of presser feet 11, therefore, even if each neutral section 21,22,23 to
It is connected in the state of roller 31 and the power supply supply of presser foot motor 14 is reduced or stopped, cloth pressing 11 capable of being also maintained
The height of cloth pressing corresponding with respective each neutral section 11, can realize the reduction of electric power consumption.
In addition, tool is there are three constant interval 24,25,26, their periphery between three neutral sections 21,22,23 gradually
Subtract or increasingly change, between each position therefore, it is possible to successfully carry out pressing position, centre position, presser feet cocked position
Height is adjusted.
In addition, control device 90 executes first or second Linear Control, that is, presser foot motor 14 is controlled, so that
The rotation by periphery cam 20 is obtained, cloth pressing 11 is made to become height corresponding with the input operating quantity of operating pedal 18,
It is thus possible to which enough be easily adjusted to cloth pressing 11 between each position of pressing position, centre position, presser feet cocked position
Arbitrary height.
Also, control device 90 controls presser foot motor 14, so that in aforementioned step S7, S9, S19,
It selectively executes the first Linear Control in the range until from pressing position to centre position and is lifted from pressing position to presser feet
The second Linear Control in the range until position is played, and in the first Linear Control, uses periphery cam 20 and pressing
The first constant interval 24 between the corresponding first neutral section 21 in position and the second neutral section 22 corresponding with centre position,
In the second Linear Control, position is lifted using the first neutral section 21 corresponding with pressing position of periphery cam 20 and with presser feet
Set the third constant interval 26 between corresponding third neutrality section 23.
Therefore, make the height of cloth pressing 11 cumulative in the adjustable range of first and second Linear Control or decreasingly become
When change, the state that the neutral section that any one occurs can be avoided to be abutted with roller 31, therefore, it is possible to keep cloth pressing 11 smooth
Ground lifts, without stopping in midway.
[other examples of the action control of presser feet lifting mechanism]
In the action control of presser feet lifting mechanism 10 shown in Fig. 6, in step S7, S9, S19, for cloth pressing
11 height and implement Linear Control, but they can also carry out following controls, that is, to level stages be adjusted,
With as pressing position, centre position, presser feet cocked position the height of any one.
For example, can be controlled presser foot motor 14 in the step S7 of Fig. 6, so that during cloth pressing 11 becomes
Between position, presser foot motor 14 is controlled in step s 9 so that cloth pressing 11 become presser feet cocked position, in step
Presser foot motor 14 is controlled in rapid S19, so that cloth pressing 11 becomes presser feet cocked position.
Thereby, it is possible to make roller 31 be abutted with any one in three neutral sections 21,22,23 of periphery cam 20, energy
Enough will be supplied during this period to the power supply of presser foot motor 14 is reduced or is stopped, therefore, it is possible to reduce the power consumption of sewing machine.
[the adjusting unit that small presser feet lifts]
The adjusting unit 40 that small presser feet lifts can also be added as shown in Figure 7 in presser feet lifting mechanism 10.
Unit 40 is adjusted for the rotation center side to periphery cam 20 by the drive connecting rod 32 to being used as carrier
Be adjusted close to extreme position, to determine the lower position of cloth pressing 11, for example, the edge by being set to sewing machine stand
The screw hole 41 of Z-direction and the adjusting screw 42 screwed togather with the screw hole 41 are constituted.
The lower end of adjusting screw 42 becomes the abutting end abutted with drive connecting rod 32, and upper end becomes for being revolved
Turn the head of operation.For head, in order to which by carrying out rotation process manually, annular knurl processing can also be implemented, alternatively, in order to
Rotation process is carried out by tool, periphery can also be set as to hexagon shape or lateral opening in upper surface setting six.
The lower end of adjusting screw 42 is abutted from top with the wrist of the side without holding roller 31 of drive connecting rod 32,
By carrying out rotation process to adjusting screw 42, to make drive connecting rod 32 rotate clockwise, roller 31 can be made to from outer
The direction movement that all cams 20 detach.
By the adjusting unit 40, roller 31 can be made opposite with the immediate position in rotation center side of periphery cam 20
It is detached in the rotation center, separated amount of movement correspondingly, can be by lower position (the usually pressing of cloth pressing 11
Position becomes lower position) move the top being adjusted to compared with pressing position.
For example, for the thicker sewn object of quality, by by the lower position of cloth pressing 11 compared with pressing position
It deviates upward a little, for example, being deviated with the degree for generating slightly narrow gap compared with fabric thickness, so as to defeated well
Send the sewn object that quality is thicker.It can carry out the adjusting that so-called small presser feet lifts.
[other]
In addition, in above-mentioned sewing machine, by make cloth pressing 11 move up and down link with thread cutter in a manner of carry out
Action control (the step S13 and S14 of Fig. 6), but the other structures of cloth pressing 11 moved up and down with sewing machine can also be made
Linkage.
For example, the line kept in the sewing starting end reached the standard grade having when the downside of needle plate starts sewing is protected
It in the sewing machine of holder device, equipped in the case of above-mentioned presser feet lifting mechanism 10, can also be configured to, be filled in wire maintainer
Set the timing that the sewing starting end reached the standard grade is kept so that cloth pressing 11 is temporarily moved upward and make to reach the standard grade not by
Cloth pressing 11 presses, and can successfully carry out the pulling action reached the standard grade kept by wire maintainer device.
In addition, also can correspondingly make presser feet lifting mechanism 10 link with the rotating speed of sewing machine, upper shaft angle degree, with regulation
Needle number or defined upper shaft angle degree make cloth pressing 11 rise and into the action control etc. for being about to sewn object release.
In addition, using following structures in above-mentioned sewing machine, that is, a pair of of support of the setting to be supported across periphery cam
Frame 151,152 is fixed presser foot motor 14 using one of bracket 152, but can also use following structures, that is, is passed through
Using with sufficient rigid motor reel and bearing of motor, to omit supporting bracket frame plate 151 and three pillars 153,
Cantilever beam support is realized merely with bracket 152.
Claims (7)
1. a kind of sewing machine, which is characterized in that have：
Revolving periphery cam；
Driven member is abutted with the periphery of the periphery cam；
Carrier, is rotated via the driven member, and lifting action is transferred to cloth pressing；
Presser foot motor makes the periphery cam rotate；And
Control device controls the presser foot motor, controls the lifting action of the cloth pressing.
2. sewing machine according to claim 1, which is characterized in that
Have operating unit, which is operated by inputting and indicates to input the height of the cloth pressing,
The control device controls the presser foot motor, so that the cloth pressing becomes and the operating unit
The corresponding height of input operating quantity.
3. sewing machine according to claim 1, which is characterized in that
The periphery cam has that there are three neutral section and three constant intervals, this three neutral sections and pressing among one week
Position, centre position, presser feet cocked position this third gear the height of the cloth pressing correspond to respectively, outer diameter is respectively constant,
Three constant intervals are set between these three neutral sections,
The outer diameter variation of each constant interval is the neutrality in the neutral section of the both sides different from outer diameter
The outer diameter in section plays the outer diameter for being gradually converted to another neutral section.
4. sewing machine according to claim 3, which is characterized in that
Have operating unit, which is operated by inputting and indicates to input the height of the cloth pressing,
The control device controls the presser foot motor, so that the cloth pressing and the operating unit is defeated
Entering operation correspondingly becomes the height of any one of the pressing position, the centre position, the presser feet cocked position.
5. sewing machine according to claim 3, which is characterized in that
Have operating unit, which is operated by inputting and indicates to input the height of the cloth pressing,
The control device executes Linear Control, that is, the presser foot motor is controlled so that the cloth pressing at
For the corresponding height of input operating quantity with the operating unit.
6. sewing machine according to claim 5, which is characterized in that
The periphery cam has：
The first neutral section, the second neutral section as described three neutral sections and third neutrality section；And
As the first constant interval, the second constant interval and the third constant interval of three constant intervals,
The control device controls the presser foot motor so that selectively executed as the Linear Control from
The first Linear Control in range until the pressing position to the centre position and from the pressing position to the pressure
Any one of the second Linear Control in range until foot cocked position, also,
In first Linear Control, first neutral zone corresponding with the pressing position of the periphery cam is used
Between first constant interval between the second neutral section corresponding with the centre position,
In second Linear Control, first neutral zone corresponding with the pressing position of the periphery cam is used
Between the third constant interval between third neutrality section corresponding with the presser feet cocked position.
7. sewing machine according to any one of claim 1 to 6, which is characterized in that
The carrier is transferred to the cloth pressure by the rotation to the rotation center side of the periphery cam, by lowering action
Foot,
The sewing machine has adjusting unit, which passes through the rotation center to the periphery cam to the carrier
Side is adjusted close to extreme position, to determine the lower position of the cloth pressing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710073488.4A CN108411504B (en) | 2017-02-10 | 2017-02-10 | Sewing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710073488.4A CN108411504B (en) | 2017-02-10 | 2017-02-10 | Sewing machine |
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| CN108411504A true CN108411504A (en) | 2018-08-17 |
| CN108411504B CN108411504B (en) | 2022-01-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111501224A (en) * | 2019-01-31 | 2020-08-07 | 杰克缝纫机股份有限公司 | Method for thread trimming, presser foot lifting and needle stitch sealing of sewing machine |
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|---|---|---|---|---|
| JPH05146575A (en) * | 1991-11-29 | 1993-06-15 | Juki Corp | Presser bar lifter controller for sewing machine |
| JPH09253365A (en) * | 1996-03-22 | 1997-09-30 | Juki Corp | Inner pressing device for automatic sewing machine |
| CN1757810A (en) * | 2004-10-08 | 2006-04-12 | 重机公司 | Sewing machine |
| JP2009240771A (en) * | 2008-03-29 | 2009-10-22 | Duerkopp Adler Ag | Sewing machine |
| CN101748566A (en) * | 2008-12-04 | 2010-06-23 | Juki株式会社 | Sewing machine |
| JP2016022382A (en) * | 2014-07-16 | 2016-02-08 | デュルコップ アドラー アクチエンゲゼルシャフト | sewing machine |
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2017
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05146575A (en) * | 1991-11-29 | 1993-06-15 | Juki Corp | Presser bar lifter controller for sewing machine |
| JPH09253365A (en) * | 1996-03-22 | 1997-09-30 | Juki Corp | Inner pressing device for automatic sewing machine |
| CN1757810A (en) * | 2004-10-08 | 2006-04-12 | 重机公司 | Sewing machine |
| JP2009240771A (en) * | 2008-03-29 | 2009-10-22 | Duerkopp Adler Ag | Sewing machine |
| CN101748566A (en) * | 2008-12-04 | 2010-06-23 | Juki株式会社 | Sewing machine |
| JP2016022382A (en) * | 2014-07-16 | 2016-02-08 | デュルコップ アドラー アクチエンゲゼルシャフト | sewing machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111501224A (en) * | 2019-01-31 | 2020-08-07 | 杰克缝纫机股份有限公司 | Method for thread trimming, presser foot lifting and needle stitch sealing of sewing machine |
| CN111501224B (en) * | 2019-01-31 | 2021-11-09 | 杰克缝纫机股份有限公司 | Method for thread trimming, presser foot lifting and needle stitch sealing of sewing machine |
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|---|---|
| CN108411504B (en) | 2022-01-07 |
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