CN1766193B - Intermittent presser foot up-down drive device and sewing machine - Google Patents
Intermittent presser foot up-down drive device and sewing machine Download PDFInfo
- Publication number
- CN1766193B CN1766193B CN 200510119225 CN200510119225A CN1766193B CN 1766193 B CN1766193 B CN 1766193B CN 200510119225 CN200510119225 CN 200510119225 CN 200510119225 A CN200510119225 A CN 200510119225A CN 1766193 B CN1766193 B CN 1766193B
- Authority
- CN
- China
- Prior art keywords
- lever
- presser foot
- intermittent presser
- arm
- swing
- 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.)
- Active
Links
Images
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
An intermittent presser foot up-down drive device includes an intermittent presser which is capable of pressing cloth to be sewn together with the vertical movement of a needle bar disposed on a sewing machine. A driving force transmission system is also included to convert a rotary drive force of a main shaft into a vertical drive force to drive the intermittent presser up-down move and transmit the same. The intermittent presser foot up-down drive device is characterized in comprising: a first link connected to a rotary shaft and swinging around the center of the about the rotary shaft; a vertical movement mechanism connected to the output end part of a first lever for vertically driving the intermittent presser; and a swing mechanism. The swing mechanism is provided with an annular member with an arm to be operated back and forth towards a fixed direction by an eccentric cam connected to the main shaft, a second lever member connected to the rotary shaft and to the arm part of the annular member with the arm and swinging around the rotary shaft, and an adjustment mechanism capable of adjusting a swing angle of the second lever member. The adjustment mechanism can adjust the vertical movement stroke of the intermittent presser by the vertical movement mechanism by means of adjusting the swing angle of the second lever member.
Description
Technical field
The processing cloth that the present invention relates to use intermittent presser foot to prevent to make object when suture needle is risen floats the intermittent presser foot up-down drive device of phenomenon and has the Sewing machines of described intermittent presser foot up-down drive device.
Background technology
In the past, being equipped with the Sewing machines that synchronously makes presser feet carry out the intermittent presser foot drive unit that intermittence moves up and down with moving up and down of shank has obtained popularizing.Use described intermittent presser foot, when on processing cloth, forming stitching, can prevent that the processing cloth when suture needle is risen from floating.
For example, Japanese patent application bulletin communique is put down into 7 years No. 44983 Sewing machines and is had following foot device.That is, described foot device has: be fixed in the bearing on the framework of Sewing machines; Be installed on the cylinder body on the described bearing; Support member moving up and down.The base end part of described support member is supported by the piston rod of described cylinder body by revolving member.On described support member, supporting to have the oscillating cam of double-fork part and circular-arc cam rotationally by anchor.Described double-fork part engages with the pin that is fixed in shank.Described circular-arc cam and the cam follower butt that rotatably is supported at depression bar.Adopt said structure, when shank moved up and down in prescribed limit, depression bar synchronously carried out intermittence with moving up and down of specified action stroke and described shank and moves up and down by circular-arc cam and cam follower.On the other hand, by making the cylinder body action, can regulate the lower position that moves up and down stroke of the presser feet pawl of being located at described depression bar lower end.
That is, in described foot device, moving up and down synchronously of oscillating cam and shank swung, and makes the presser feet pawl carry out intermittence thus and moves up and down.Again, by cylinder body being moved change the height and position of the base end part of oscillating cam.Its result can regulate the lower position that moves up and down stroke of presser feet pawl.
Yet,, can not realize being adapted to processing the compress state of the best of cloth material if only the lower position that moves up and down stroke of presser feet pawl is regulated.
For this reason, generally consider it is to adopt the installation site of the pin by making the shank that engages with the double-fork part of oscillating cam to move the structure that moves up and down stroke of regulating the presser feet pawl towards horizontal direction.But, if adopt this structure, because of oscillating cam is that rotate at the center with described anchor, double-fork part upward or the below move, so the lower position of presser feet pawl can be changed.Therefore, regulate the presser feet pawl move up and down stroke the time, must make the cylinder body action, readjust the lower position that moves up and down stroke of presser feet pawl, have that to regulate operation complicated and need the problem of very long adjusting time etc.
Summary of the invention
The objective of the invention is to, intermittent presser foot up-down drive device that moves up and down stroke and the Sewing machines thereof that can regulate the intermittent presser foot of pushing the processing cloth of making object simply are provided.
Intermittent presser foot up-down drive device of the present invention has: be located at moving up and down of sewing machine needle bar and push the intermittent presser foot of making object cloth linkedly; The rotary driving force of main shaft is transformed into the driving force transmission system that driving force up and down that described intermittent presser foot is moved up and down is transmitted, it is characterized in that, comprising: link with turning cylinder, be the 1st lever that the center can be swung with described turning cylinder; The reciprocating mechanism that links, drives up and down described intermittent presser foot with the outlet end part of described the 1st lever; By by the eccentric cam that links with described main shaft towards certain orientation carry out reciprocating action and have the annular component of an arm, when linking with described arm with the binding of described turning cylinder and with described turning cylinder be the 2nd lever that can swing of center, the swing mechanism that makes described the 1st lever swing formed of the governor motion of the angle of oscillation that can regulate described the 2nd lever, described governor motion, by regulating the angle of oscillation of described the 2nd lever, can regulate the stroke that moves up and down of described intermittent presser foot by described reciprocating mechanism.
Again, the Sewing machines with intermittent presser foot up-down drive device of the present invention, wherein, intermittent presser foot up-down drive device has: shank moving up and down; Push the intermittent presser foot of making object cloth linkedly with moving up and down of described shank; The rotary driving force of main shaft is transformed into the driving force transmission system that driving force up and down that described intermittent presser foot is moved up and down is transmitted, it is characterized in that described intermittent presser foot up-down drive device comprises: with the turning cylinder binding, with described turning cylinder is the 1st lever that the center can be swung; The reciprocating mechanism that links, drives up and down described intermittent presser foot with the outlet end part of described the 1st lever; By by the eccentric cam that links with described main shaft towards certain orientation carry out reciprocating action and have the annular component of an arm, when linking with described arm with the binding of described turning cylinder and with described turning cylinder be the 2nd lever that can swing of center, the swing mechanism that described the 1st lever swing is used formed of the governor motion of the angle of oscillation that can regulate described the 2nd lever, described governor motion, by regulating the angle of oscillation of described the 2nd lever, can regulate the stroke that moves up and down of described intermittent presser foot by described reciprocating mechanism.
Adopt said structure, when making,, then make annular component carry out reciprocating action towards certain orientation by eccentric cam in case main shaft is driven in rotation, thus, swing with the 2nd lever of arm binding with by the 1st lever that turning cylinder and described the 2nd lever link.Again, by the swing of the 1st lever, intermittent presser foot is driven up and down.This occasion owing to can suitably regulate the angle of oscillation of the 2nd lever by governor motion, therefore, can be adjusted to the optimum state that conforms to the material of described processing cloth to the compress form of processing cloth with intermittent presser foot.
Description of drawings
Fig. 1 reinforces the stereogram of Sewing machines, the figure of the intermittent presser foot up-down drive device of perspective representation inside for see the electronics noose the present invention the 1st embodiment from the left front.
Fig. 2 is for seeing the stereogram of intermittent presser foot up-down drive device from the left front.
Fig. 3 is for seeing the partial perspective view of intermittent presser foot up-down drive device from the right front.
Fig. 4 is the right side view of intermittent presser foot up-down drive device.
Fig. 5 A is the front view of swing mechanism.
Fig. 5 B is the front view of reciprocating mechanism.
Fig. 6 A is the front view of the swing mechanism of sliding pin when being in little swing position.
Fig. 6 B is the front view of the swing mechanism of sliding pin when being in big swing position.
Fig. 7 A be sliding pin when being in little swing position the 1st connecting rod be in the front view of the lower position of the 1st position and the intermittent presser foot reciprocating mechanism when high.
Fig. 7 B be sliding pin when being in little swing position the 1st connecting rod be in the front view of the lower position of the 2nd position and the intermittent presser foot reciprocating mechanism when high.
Fig. 8 A be sliding pin when being in little swing position the 1st connecting rod be in the front view of the lower position of the 1st position and the intermittent presser foot reciprocating mechanism when low.
Fig. 8 B be sliding pin when being in little swing position the 1st connecting rod be in the front view of the lower position of the 2nd position and the intermittent presser foot reciprocating mechanism when low.
Fig. 9 A be sliding pin when being in big swing position the 1st connecting rod be in the front view of the lower position of the 1st position and the intermittent presser foot reciprocating mechanism when high.
Fig. 9 B be sliding pin when being in big swing position the 1st connecting rod be in the front view of the lower position of the 2nd position and the intermittent presser foot reciprocating mechanism when high.
Figure 10 A be sliding pin when being in big swing position the 1st connecting rod be in the front view of the lower position of the 1st position and the intermittent presser foot reciprocating mechanism when low.
The 2nd connecting rod was in the front view of the lower position of the 2nd position and the intermittent presser foot reciprocating mechanism when low when Figure 10 B sliding pin was in big swing position.
The figure that Figure 11 concerns for the height and position of height and position and the intermittent presser foot of expression the 2nd connecting rod.
The specific embodiment
Be described the present invention in order to illustrate in further detail with reference to accompanying drawing.Fig. 1～Figure 11 represents an embodiment who is applicable to electronics noose reinforcing Sewing machines of the present invention.As shown in Figure 1, electronics noose reinforcing Sewing machines M comprises: support portion 1 (with reference to Fig. 4); The upright socle portion 3 that is located at the rearward end of described support portion 1; From the upper end of described socle portion 3 forwards approximate horizontal extend, with 1 opposed arm of described support portion 4.In the inside of described arm 4, setting the main shaft 5 that drives rotation by electrical motor of sewing machine (not shown).At the head (front portion) of described arm 4, be provided with the shank (all not shown) that suture needle releasably is installed in the lower end, setting the depression bar 7 that intermittent presser foot 6 is equipped with in the lower end simultaneously.On described socle portion 3 and described arm 4, setting the intermittent presser foot up-down drive device 10 that described intermittent presser foot 6 is moved up and down again.
Shown in Fig. 1～Fig. 6 B, described intermittent presser foot up-down drive device 10 has: accept the rotary driving force of main shaft 5, the swing mechanism 11 that the 1st lever 25 is swung; The reciprocating mechanism 12 that links, drives up and down intermittent presser foot 6 with the outlet end part of the 1st lever 25; The intermittent presser foot lower position governor motion 13 of the lower position of adjusting intermittent presser foot 6 etc.
Described swing mechanism 11 has: with the eccentric cam 20 (with reference to Fig. 5 A, Fig. 6 A, Fig. 6 B) of main shaft 5 bindings; Have by described eccentric cam 20 arm of reciprocating action on left and right directions annular component promptly, the annular component 21 of band arm; The turning cylinder 22 that the machine frame F that rotatably is supported on Sewing machines goes up, extend along fore-and-aft direction; The 2nd lever 23 that is bonded in rearward end, its upper end of described turning cylinder 22; Can regulate the governor motion 24 of the angle of oscillation of described the 2nd lever 23.
The annular component 21 of described band arm has an arm 21a and an annulus 21b, and the leading section of described arm 21a and described the 2nd lever 23 link.Described eccentric cam 20 is fixed in than the leading section of described main shaft 5 part at rear slightly, and the annulus 21b of described annular component 21 is embedded in outward on the described eccentric cam 20.Described turning cylinder 22 is configured in the place ahead of annular component 21 of band arm and high position, and the upper end of end and described the 2nd lever 23 is affixed thereafter, and is affixed in the upper end of the leading section of described turning cylinder 22 and the 1st lever 25.
On the 2nd lever 23, be formed with the curved recessed portion 23a of Rack,, formed the width dimensions forniciform circular hole 23b littler continuously than this curved recessed portion 23a simultaneously at the rear of described curved recessed portion 23a.As described later, described curved recessed portion 23a and circular hole 23b are the members that is used to switch the coupling position that props up arm 21a and the 2nd lever 23 of the annular component 21 of being with arm.Described curved recessed portion 23a and circular hole 23b constitute the eccentric cam 20 when shank is in assigned position the center, will be with the structure of the axle center O of the annulus 21b of the annular component 21 of arm (among Fig. 5 A with the state shown in the solid line) as the circular shape of radius centered R.In addition, in the present embodiment, " assigned position " of shank is set to the stop position " from the position that uppermost position in fig-ure descends slightly " of making the shank when stopping.
The following describes described governor motion 24.That is, the sliding pin 26 that engages with curved recessed portion 23a is linked to the left part of an arm 21a rotationally.At the rear portion of described sliding pin 26, convex with and insert the fixed axis (not shown) that leads in described circular hole 23b.Described fixed axis connects described arm 21a, and the end protrudes from the rear portion of an arm 21a thereafter, and is fastening by the hold-down nut 50 that will screw in this protrusion end, can described arm 21a and the 2nd lever 23 is fixing.And, unclamp described hold-down nut 50, move along curved recessed portion 23a and circular hole 23b by making sliding pin 26, can switch to the coupling position of an arm 21a and the 2nd lever 23.That is, in the present embodiment, described hold-down nut 50 is equivalent to clamp structure.
Described sliding pin 26 is embedded among the described curved recessed portion 23a after 2 relative surface chamfers are handled.Adopt this structure, when tightening or loosening, the sliding pin 26 that engages with curved recessed portion 23a is stopped operating by hold-down nut 50.
Begin to make operation, when main shaft 5 when prescribed direction rotation drives, by described eccentric cam 20 annular component 21 of band arm is moved back and forth on left and right directions.Thus, the 2nd lever 23 is the center swing with turning cylinder 22, also swings (with reference to Fig. 5 B) simultaneously with the 1st lever 25 that described turning cylinder 22 links.
At this moment, when the coupling position of described curved recessed portion 23a and circular hole 23b and sliding pin 26 is in the little swing position of the bottom shown in Fig. 6 A, the angle of oscillation of the 2nd lever 23 diminishes, and the angle of oscillation of the 1st lever 25 also diminishes thereupon, and the stroke that moves up and down of intermittent presser foot 6 is shortened.On the other hand, when the coupling position of described sliding pin 26 and curved recessed portion 23a and circular hole 23b is in the big swing position on the top shown in Fig. 6 B, it is big that the angle of oscillation of the 2nd lever 23 becomes, and it is big that the angle of oscillation of the 1st lever 25 also becomes thereupon, make intermittent presser foot 6 to move up and down stroke elongated.
Thus, can regulate the governor motion 24 of the angle of oscillation of the 2nd lever 23, constitute by curved recessed portion 23a, circular hole 23b, sliding pin 26, hold-down nut 50 etc.In addition, the switching operation of the coupling position of described sliding pin 26 and curved recessed portion 23a and circular hole 23b between little swing position and big swing position carried out when shank is in aforesaid assigned position.When described shank is in assigned position, because of circular hole 23b has formed circular arc around the center of eccentric cam 20, so even switch the coupling position of described sliding pin 26 and curved recessed portion 23a and circular hole 23b, the 2nd lever 23 and the 1st lever 25 are not swung yet.That is, in the present embodiment, the angle of oscillation of regulating the 2nd levers 23 and the 1st lever 25 by governor motion 24 promptly, intermittent presser foot 6 move up and down stroke the time, the lower position of intermittent presser foot 6 does not change.
Below with reference to Fig. 1～Fig. 4, Fig. 5 B aforementioned reciprocating mechanism 12 is described.Described reciprocating mechanism 12 has: by the output end of its left part and the 1st lever 25 the 1st connecting rod 30 that link, that left and right directions extends; The 2nd connecting rod 31 that links by the right part of its upper end and described the 1st connecting rod 30; By the base end part binding of its right part and described the 2nd connecting rod 31 and by the support sector (not shown) of left part and machine frame F the 3rd connecting rod 32 that link, that left and right directions extends.
Described the 2nd connecting rod 31 has constituted the L word shape of being made up of 31a of longitudinal rod portion and the 31b of transverse link portion.The upper end of the connecting rod 33 that the leading section of the described transverse link 31b of portion and above-below direction extend links.The bottom of described connecting rod 33 is affixed with the upper end of depression bar 7 by presser bar spring bracket 34, and the bottom of described depression bar 7 is with removably intermittent presser foot 6 is affixed.
The 3rd connecting rod 32 has two forked 32a of spring support portion (with reference to Fig. 4).Insert on the top of described depression bar 7 and to lead to compression helical spring 35, the described spring support 32a of portion is configured in the bottom of compression helical spring 35 in described depression bar 7.Thus, the described spring support 32a of portion applies elastic force downwards all the time by described compression helical spring 35.The elevation angle (gradient) of described the 3rd connecting rod 32 relative horizontal directions utilizes the 48a of support point portion of intermittent presser foot described later lower position governor motion 13 to change.
In the present embodiment, when shank was in assigned position, the 1st, the 2nd, the 3rd connecting rod 30,31,32 became the structure of parallel rod.Promptly, if with the point of contact of the 1st lever 25 and the 1st connecting rod 30 as P1, with the point of contact of the 1st connecting rod 30 and the 2nd connecting rod 31 as P2, with the point of contact of the 2nd connecting rod 31 and the 3rd connecting rod 32 as P3, with the point of contact of the 3rd connecting rod 32 and machine frame F as P4, then limit P1-P2 is parallel with limit P3-P4, and limit P2-P3 is parallel with limit P4-P1.
When main shaft 5 rotation drivings moved up and down shank, as previously mentioned, the 2nd lever 23 and the 1st lever 25 were swung.Its result, the 2nd connecting rod 31 is center swing by the 1st connecting rod 30 with point of contact P3, depression bar 7 and intermittent presser foot 6 with the 31b of transverse link portion of the 2nd connecting rod 31 links move up and down moving up and down in the stroke of regulation with moving up and down linkedly of shank.
The following describes aforementioned intermittent presser foot lower position governor motion 13.As Fig. 1～shown in Figure 4, in described socle portion 3, the unit box body 40 of the driver element of taking in drive system is set.In described unit box body 40, supporting to be connected with the axle 41 of cam body 42.Described axle 41 is just changeing driving or inversion driving by gear mechanism (not shown) in the driving that is installed on unit box body 40 down with the driving (with reference to Fig. 1) of stepper motor 43.
In the upper end of described unit box body 40, supporting rocking lever 45 by axle 44.In the bottom of described rocking lever 45, rotatably supporting driven pulley 46 with described cam body 42 periphery butts.The rearward end of the binding pole 47 that the upper end of described rocking lever 45 and fore-and-aft direction extend links.The leading section of described binding pole 47 links with an end of supporting lever 48.Described support lever 48 is supported among the machine frame F rotationally, and the 48a of support point portion is set in its other end.The described support point 48a of portion is from middle part, the left and right directions way butt of below and described the 3rd connecting rod 32.
When axle 41 when described driving is just being changeed under with the driving of stepper motor 43, link pole 47 and rearward move, thus, support that lever 48 rotates along the clockwise direction among Fig. 4.Its result, mention upward at the middle part, way of the 3rd connecting rod 32, and the 1st, the 2nd, the 3rd connecting rod 30,31,32 becomes the upper right posture (with reference to Fig. 5 B, Fig. 7 A etc.) that rises.At this moment, corresponding with point of contact P3 rising as previously mentioned, the 2nd connecting rod 31 rises with the constant state of its posture, so the lower position of intermittent presser foot 6 uprises.
On the other hand, when axle 41 reverses under the driving of described driving with stepper motor 43, link pole 47 and forwards move, thus, support that lever 48 rotates along the counter clockwise direction among Fig. 4.Its result, fall downwards at the middle part, way of the 3rd connecting rod 32, and the 1st, the 2nd, the 3rd connecting rod 30,31,32 becomes the bottom right and falls posture (with reference to Fig. 8 A, Fig. 8 B etc.).At this moment, corresponding with point of contact P3 decline as previously mentioned, the 2nd connecting rod 31 descends with the constant state of its posture, so the lower position step-down of intermittent presser foot 6.
This occasion, when shank is in assigned position, because of having adopted the 1st, the 2nd, the 3rd connecting rod 30,31,32 to become the structure of parallel rod, even the 3rd connecting rod 32 is switched to the bottom right and falls posture or posture is fallen in the 3rd connecting rod 32 from the bottom right and switch to the upper right posture that rises from the upper right posture that rises, the 2nd connecting rod 31 also can keep its posture ground to carry out linearity moving up and down.Like this, if will be from the height dimension of the point of contact P3 of needle plate 2 to the 2nd connecting rods 31 as H1, will be from needle plate 2 to intermittent presser foot 6 height dimension as H2 (with reference to Fig. 7), then as shown in figure 11, the linear function that height dimension H2 becomes height dimension H1 (in addition, the position of point of contact P3 when the height dimension H2 of intermittent presser foot 6 is " 0 " is as the reference position, if with the height dimension of the described relatively reference position of point of contact P3 as h1, then H2 and h1 are proportionate relationship).
The following describes can regulate move up and down stroke move up and down stroke control mechanism 14.
Shown in Fig. 2, Fig. 3, Fig. 5 B, move up and down stroke control mechanism 14 and have: 1 couple connect apertures 25a, the 25b up and down that are formed at the output end of the 1st lever 25; Be formed near 1 couple connect apertures 31c, the 31d up and down in upper end of the 2nd lever 31.Set 1 pair 1 pair the interval of connect apertures 31c, 31d up and down of interval and the 2nd connecting rod 31 of connect apertures 25a, 25b up and down of these the 1st levers 25 for equate size.
The connect apertures 25a with the left part of the 1st connecting rod 30 and the 1st lever 25 bottoms link and during with the connect apertures 31c binding of the right part of the 1st connecting rod 30 and the 2nd lever 31 bottoms (following with this coupling position as the 1st position, with reference to Fig. 7 A, Fig. 8 A), intermittent presser foot 6 to move up and down stroke elongated, the connect apertures 25b with the left part of the 1st connecting rod 30 and the 1st lever 25 tops link and during with the connect apertures 31d binding on the right part of the 1st connecting rod 30 and the 2nd lever 31 tops (following with this coupling position as the 2nd position, with reference to Fig. 7 B, Fig. 8 B), the stroke that moves up and down of intermittent presser foot 6 shortens.
That is, by the 1st connecting rod 30 is switched to the 1st position or the 2nd position with respect to the coupling position of the 1st lever 25 and the 2nd connecting rod with selecting a property, the have a rest stroke that moves up and down of presser feet 6 of adjustable internode.And, if shank is in assigned position, then the 1st, the 2nd, the 3rd connecting rod 30,31,32 is still kept parallel rod, the coupling position of the 1st connecting rod 30 can be switched to make moving up and down the 1st elongated position of stroke or make and moving up and down the 2nd position that stroke shortens of intermittent presser foot 6.
The following describes the effect of the intermittent presser foot up-down drive device 10 of said structure.
Fig. 7 A represents that sliding pin 26 is in little swing position (with reference to Fig. 6 A), and by stepper motor 43 lower position of intermittent presser foot 6 is set in high position (the upper right posture that rises), and then makes the coupling position of the 1st connecting rod 30 be in the state of the 1st position.Under this state, Once you begin make, then as previously mentioned, by the rotation driving of main shaft 5, the annular component 21 of band arm moves back and forth on left and right directions by eccentric cam 20, makes 25 swings of the 1st lever.
Its result, the 1st connecting rod 30 moves to left and right direction, and thus, the 2nd connecting rod 31 is that oscillation center is swung with point of contact P3, and the intermittent presser foot 6 of while with the 31b of the transverse link portion binding of the 2nd connecting rod 31 moves up and down with the stroke of stipulating that moves up and down.
Stop the back shank when being in assigned position when making, in case the coupling position of the 1st connecting rod 30 switches to the 2nd position (state shown in Fig. 7 B) from the 1st position, the stroke that moves up and down of intermittent presser foot 6 shortens.At this moment, still keep parallel rod because of the 1st, the 2nd, the 3rd connecting rod 30,31,32, so can keep the height and position and the posture thereof of the 2nd connecting rod 31, the lower position of intermittent presser foot 6 does not change.That is, even in the occasion that moves up and down stroke of having regulated intermittent presser foot 6, the lower position of intermittent presser foot 6 does not change yet.Therefore, after adjusting moves up and down stroke, do not need to readjust the lower position of intermittent presser foot 6, can realize the simplification of the adjusting operation that moves up and down stroke of intermittent presser foot 6.
Secondly, begin to drive stepper motor 43 from the state shown in Fig. 7 A (coupling position of the 1st connecting rod 30 is in the 1st position and sliding pin is in the state of little sliding position), when switching to low position (posture falls in the bottom right) in lower position, then become the state shown in Fig. 8 A with intermittent presser foot 6.
This occasion, as previously mentioned, the 2nd connecting rod 31 keeps its posture ground linearity to move downwards.Its result, 6 height H 2 changes with respect to the variation from the height H 1 of the point of contact P3 of needle plate 2 to the 2nd connecting rods 31 proportionally from needle plate 2 to intermittent presser foot.Therefore, the operation that moves up and down of regulating intermittent presser foot 6 by moving up and down of the 2nd connecting rod 31 is oversimplified more.
Under this state, in case the installation site of the 1st connecting rod 30 switches to the 2nd position (state shown in Fig. 8 B) from the 1st position, its result, the stroke that moves up and down of intermittent presser foot 6 shortens, but as previously mentioned, because of the lower position of intermittent presser foot 6 does not change, so after adjusting moves up and down stroke, do not need to readjust the lower position of intermittent presser foot 6.Therefore, can realize the simplification of the adjusting operation that moves up and down stroke of intermittent presser foot 6.
On the other hand, stop the back shank when being in assigned position when making, from the state shown in Fig. 7 A, if by governor motion 24 sliding pin 26 is switched to big swing position (Fig. 6 B) with respect to the coupling position of the 2nd lever 23 of arm 21a along circular hole 23b, then becomes the state shown in Fig. 9 A.Like this, it is big that the angle of oscillation of the angle of oscillation of the 2nd lever 23 and the 1st lever 25 becomes, and can increase the stroke that moves up and down of intermittent presser foot 6.
When shank is in assigned position,, can not make 23 swings of the 2nd lever by circular hole 23b even sliding pin 26 moves along circular hole 23b with respect to the coupling position of the 2nd lever 23 of arm 21a yet.Therefore, even regulate the stroke that moves up and down of intermittent presser foot 6, because of the lower position of intermittent presser foot 6 does not change, so after adjusting moves up and down stroke, do not need to readjust the lower position of intermittent presser foot, therefore, can realize the simplification of the adjusting operation that moves up and down stroke of intermittent presser foot 6.
Then, from the state shown in Fig. 9 A, in case the installation site of the 1st connecting rod 30 switches to the 2nd position from the 1st position, then become the state shown in Fig. 9 B, the stroke that moves up and down of intermittent presser foot 6 shortens,
Yet, even this occasion because of the lower position of intermittent presser foot 6 does not change, so do not need to readjust the lower position of intermittent presser foot 6 after adjusting moves up and down stroke, can realize the simplification of the adjusting operation that moves up and down stroke of intermittent presser foot 6.
On the other hand, when shank is in assigned position,, when the lower position of intermittent presser foot 6 being switched to low position (posture falls in the bottom right), then become the state shown in Figure 10 A by stepper motor 43 from the state shown in Fig. 9 A.
This occasion, as previously mentioned, the 2nd connecting rod 31 keeps its posture ground linearity to move downwards.Its result, 6 height H 2 changes with respect to the variation from the height H 1 of the point of contact P3 of needle plate 2 to the 2nd connecting rods 31 proportionally from needle plate 2 to intermittent presser foot.Therefore, the operation that moves up and down of regulating intermittent presser foot 6 by moving up and down of the 2nd connecting rod 31 is oversimplified more.
Under this state, in case the installation site of the 1st connecting rod 30 switches to the 2nd position from the 1st position, then become the state shown in Figure 10 B, the stroke that moves up and down of intermittent presser foot 6 shortens, this occasion, because of the lower position of intermittent presser foot 6 does not change,, can realize the simplification of the adjusting operation that moves up and down stroke of intermittent presser foot 6 so after adjusting moves up and down stroke, do not need to readjust the lower position of intermittent presser foot 6.
Like this, in the present embodiment, because intermittent presser foot up-down drive device 10 is made of swing mechanism 11 and reciprocating mechanism 12, described swing mechanism 11 has been made the structure of annular component 21, turning cylinder the 22, the 2nd lever 23 and governor motion 24 with band arm, therefore, as required, can regulate the angle of oscillation of the 2nd lever 23 simply by described governor motion 24.
Again, described governor motion 24 has: be arranged on the circular hole 23b on the leading section of an arm 21a of annular component 21 of band arm; The sliding pin 26 that engages with described circular hole 23b; Liftedly described sliding pin 26 is fixed on the hold-down nut 50 on the 2nd lever 23.Therefore, only need unclamp described hold-down nut 50, the coupling position of change sliding pin 26 and circular hole 23b, again that hold-down nut 50 is fastening, just can easily change the coupling position of sliding pin 26 relative circular hole 23b, can regulate the angle of oscillation of the 2nd lever 23 simply.
And governor motion 24 is by regulating the angle of oscillation of the 2nd lever 23, by the reciprocating mechanism 12 adjustable internodes stroke that moves up and down of presser feet 6 of having a rest, so can realize the best compress state that conforms to the material of processing cloth.
The present invention is not limited to the above embodiments, for example also can make following distortion.
Also the circular hole 23b that is formed at the 2nd lever 23 can be formed, when shank is in assigned position, around the center of main shaft 5, be circular shape.
Also can replace hold-down nut 50, change use into and carry out the application of force by the elastic component that elastic force presses on sliding pin 26 circular hole all the time.This occasion only need make sliding pin 26 move along circular hole 23b and get final product, and the coupling position change action of sliding pin 26 is oversimplified.This occasion, elastic component is equivalent to clamp structure.
Regulate intermittent presser foot move up and down stroke etc. the time the shank position, be not limited to the position that descends slightly from uppermost position in fig-ure.That is, also can adopt when shank is in uppermost position in fig-ure the structure that moves up and down stroke etc. of regulating intermittent presser foot.Again, in the foregoing description, with switch in the coupling position of the 1st connecting rod 30, in the position of switching sliding pin 26 between little sliding position and the big sliding position, the 1st, the 2nd, the 3rd connecting rod becomes in the parallel rod, all as shank be in the same position (from the position that uppermost position in fig-ure descends slightly), but also shank be in the diverse location respectively.
Claims (4)
1. intermittent presser foot up-down drive device has: be located at moving up and down of sewing machine needle bar and push the intermittent presser foot of making object cloth linkedly; The rotary driving force of main shaft is transformed into the driving force transmission system that driving force up and down that described intermittent presser foot is moved up and down is transmitted, it is characterized in that, comprising:
With the turning cylinder binding, with described turning cylinder is the 1st lever that the center can be swung;
The reciprocating mechanism that links, drives up and down described intermittent presser foot with the outlet end part of described the 1st lever;
Make the swing mechanism of described the 1st lever swing, it comprise by the eccentric cam that links with described main shaft towards certain orientation carry out reciprocating action and have the annular component of an arm, be the 2nd lever that can swing of center, the governor motion that can regulate the angle of oscillation of described the 2nd lever with the binding of described turning cylinder and with described turning cylinder when linking with described arm
Described governor motion, by regulating the angle of oscillation of described the 2nd lever, can regulate the stroke that moves up and down of described intermittent presser foot by described reciprocating mechanism, and, described governor motion has the circular hole that is formed on described the 2nd lever, is used to switch the coupling position of described described relatively the 2nd lever of arm
Described circular hole constitutes when described shank is in assigned position, be the structure that the center is circular shape with the axle center of the described annular component on the described eccentric cam, or constitute the structure that when described shank is in assigned position, around the center of described main shaft, is circular shape.
2. intermittent presser foot up-down drive device as claimed in claim 1, it is characterized in that described governor motion has the leading section that is arranged at described arm, the sliding pin that engages with described connecting hole and liftedly described sliding pin is fixed on clamp structure on described the 2nd lever.
3. Sewing machines with intermittent presser foot up-down drive device, wherein, intermittent presser foot up-down drive device has: shank moving up and down; Push the intermittent presser foot of making object cloth linkedly with moving up and down of described shank; The rotary driving force of main shaft is transformed into the driving force transmission system that driving force up and down that described intermittent presser foot is moved up and down is transmitted, it is characterized in that,
Described intermittent presser foot up-down drive device comprises: with the turning cylinder binding, with described turning cylinder is the 1st lever that the center can be swung; The reciprocating mechanism that links, drives up and down described intermittent presser foot with the outlet end part of described the 1st lever; The swing mechanism that described the 1st lever swing is used, it comprise by the eccentric cam that links with described main shaft towards certain orientation carry out reciprocating action and have the annular component of an arm, be the 2nd lever that can swing of center, the governor motion that can regulate the angle of oscillation of described the 2nd lever with the binding of described turning cylinder and with described turning cylinder when linking with described arm
Described governor motion, by regulating the angle of oscillation of described the 2nd lever, can regulate the stroke that moves up and down of described intermittent presser foot by described reciprocating mechanism, and, described governor motion has the circular hole that is formed on described the 2nd lever, is used to switch the coupling position of described described relatively the 2nd lever of arm
Described circular hole constitutes when described shank is in assigned position, be the structure that the center is circular shape with the axle center of the described annular component on the described eccentric cam, or constitute the structure that when described shank is in assigned position, around the center of described main shaft, is circular shape.
4. Sewing machines as claimed in claim 3 is characterized in that, described governor motion has the leading section that is arranged at described arm, the sliding pin that engages with described connecting hole and liftedly described sliding pin is fixed on clamp structure on described the 2nd lever.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-312759 | 2004-10-27 | ||
| JP2004312759A JP2006122231A (en) | 2004-10-27 | 2004-10-27 | Intermittent presser vertically driving device and sewing machine |
| JP2004312759 | 2004-10-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1766193A CN1766193A (en) | 2006-05-03 |
| CN1766193B true CN1766193B (en) | 2010-11-10 |
Family
ID=36717514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510119225 Active CN1766193B (en) | 2004-10-27 | 2005-10-27 | Intermittent presser foot up-down drive device and sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2006122231A (en) |
| CN (1) | CN1766193B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100944296B1 (en) * | 2006-08-28 | 2010-02-24 | 브라더 고오교오 가부시키가이샤 | Sewing machine |
| CN103757826A (en) * | 2013-12-30 | 2014-04-30 | 张章生 | Sewing machine and flexible medium presser foot driving mechanism |
| CN107354600A (en) * | 2016-05-10 | 2017-11-17 | 天津宝盈电脑机械有限公司 | A kind of Novel sewing head |
| CN108301125A (en) * | 2017-01-11 | 2018-07-20 | 天津宝盈电脑机械有限公司 | A kind of presser feet driving of full-automatic sewing machine and control mechanism |
| CN109972308B (en) * | 2019-04-11 | 2021-11-02 | 杰克缝纫机股份有限公司 | Needle bar stroke adjusting structure, sewing machine with needle bar stroke adjusting structure and stroke adjusting method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114370A (en) * | 1993-12-24 | 1996-01-03 | 重机公司 | Device for adjusting heigll of presser feet of sewing machine |
| CN1233679A (en) * | 1998-02-27 | 1999-11-03 | 重机株式会社 | Pressing and holding mechanism of sewing machine |
| CN1095894C (en) * | 1997-05-09 | 2002-12-11 | 株式会社巴鲁丹 | Presser foot device for sewing machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6058192A (en) * | 1983-09-09 | 1985-04-04 | 三菱電機株式会社 | Cloth presser of automatic sewing machine |
| JP3292389B2 (en) * | 1992-10-20 | 2002-06-17 | ブラザー工業株式会社 | sewing machine |
-
2004
- 2004-10-27 JP JP2004312759A patent/JP2006122231A/en active Pending
-
2005
- 2005-10-27 CN CN 200510119225 patent/CN1766193B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1114370A (en) * | 1993-12-24 | 1996-01-03 | 重机公司 | Device for adjusting heigll of presser feet of sewing machine |
| CN1095894C (en) * | 1997-05-09 | 2002-12-11 | 株式会社巴鲁丹 | Presser foot device for sewing machine |
| CN1233679A (en) * | 1998-02-27 | 1999-11-03 | 重机株式会社 | Pressing and holding mechanism of sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006122231A (en) | 2006-05-18 |
| CN1766193A (en) | 2006-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1766192B (en) | Intermittent presser foot up-down drive device and sewing machine | |
| CN1766193B (en) | Intermittent presser foot up-down drive device and sewing machine | |
| US4116145A (en) | Upper fabric feed device for sewing machines | |
| KR100343605B1 (en) | Sewing machine height adjustment device | |
| CN101864644B (en) | Upward and downward feeding sewing machine | |
| CN101100788A (en) | Sewing machine | |
| JP2003181173A (en) | Stitch forming method for sewing machine and stitch forming device for sewing machine | |
| CN1982524B (en) | Center presser mechanism for sewing machine | |
| CN101392437B (en) | Intermediate presser foot device of sewing machine | |
| CN106637709A (en) | Middle presser foot mechanism and sewing machine | |
| SE464920B (en) | FEEDING DEVICE FOR A SEWING MACHINE | |
| JPH0358755B2 (en) | ||
| US3921552A (en) | Work feed mechanisms for sewing machines | |
| CN1800479B (en) | Needle drive of sewing machine | |
| US4436045A (en) | Differential feed mechanism for sewing machines | |
| CN1291093C (en) | Foot-press operating device for sewing machine | |
| JPS6229071B2 (en) | ||
| US4183310A (en) | Feed and loop taker module for a sewing machine | |
| US28562A (en) | Machine for | |
| US4421047A (en) | Upper feed dog device | |
| US3019750A (en) | Feed device for a sewing-machine | |
| US308390A (en) | tripp | |
| JP2762679B2 (en) | Sewing machine top feeder | |
| US4131076A (en) | Sewing machine work feeding mechanism | |
| US94467A (en) | Improvement in sewing-machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |