CN101435140B - Upper thread retaining apparatus of sewing machine - Google Patents

Upper thread retaining apparatus of sewing machine Download PDF

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Publication number
CN101435140B
CN101435140B CN2008101770253A CN200810177025A CN101435140B CN 101435140 B CN101435140 B CN 101435140B CN 2008101770253 A CN2008101770253 A CN 2008101770253A CN 200810177025 A CN200810177025 A CN 200810177025A CN 101435140 B CN101435140 B CN 101435140B
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aforementioned
clamping part
standard grade
clamping
line
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CN101435140A (en
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加藤大介
坂井克秋
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Juki Corp
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Juki Corp
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D05B65/06—Devices for severing the needle or lower thread and for disposing of the severed thread end ; Catching or wiping devices for the severed thread

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

The invention provides an on-line device of a sewing machine, wherein, under the condition of sewing the front-end side of a line tip into a line trace of the back of the cloth material to form a line ring passing through a line capture part, the line ring can also be easily separated from the line capture part. The on-line device is provided with the line capture part which is provided with a nick part and an opening and closing body enabling the opening of the nick part to be configured when open or closed; the on-line device has a retaining unit formed by a first retaining component and a second retaining component; a first retaining part is formed by the first retaining component making use of blocking a position of an opening of the nick part in the opening and closing body; the second retaining component is provided with a second retaining part which can be relatively configured contacting/far away relatively to the first retaining part and retains the line tip of the on line between the first retaining part which is formed movably to enable the line capture part to be an opening state through the on-line process after the line is retained.

Description

The thread holding device of Sewing machines
Technical field
The present invention relates to a kind of thread holding device of Sewing machines, it is clamped in the thread end of reaching the standard grade in the insertion suture needle at the 1st stitch place of making beginning below needle plate.
Background technology
Current, for example as described in the patent documentation 1, known a kind of thread holding device (top thread retaining device), it can be below needle plate, is clamped in the thread end of reach the standard grade (needlework) in the insertion suture needle through wires hole at the 1st stitch place of making beginning.
In patent documentation 1 described thread holding device, when making beginning, the line capture unit (open-work) that forms the frame shape is configured in moving up and down on the path of suture needle, the 1st clamping part and the 2nd clamping part are set simultaneously, the 1st clamping part consists of the part of the endoporus of line capture unit, the 2nd clamping part can contact/remotely configuration in the mode relative with the 1st clamping part.And form, at the 1st stitch place of making beginning, after the inside of online capture unit catches and reaches the standard grade, the line capture unit is left from the path that moves up and down of suture needle, the thread end that clamping is reached the standard grade between the 1st clamping part and the 2nd clamping part afterwards, in detail the clamping front end (line end) of reaching the standard grade near, then after forming predefined stitch, decontrol the thread end of reaching the standard grade of clamping.
Patent documentation 1: JP 2004-167007 communique
Summary of the invention
But, in existing thread holding device, there is as described later following problems, that is, sewed up in the stitching at the cloth back side and formed in the situation of the wire loop that passes the line capture unit in the front of the thread end of reaching the standard grade of clamping, wire loop is broken away from from the line capture unit.
Like this, if wire loop can't be discharged from the line capture unit, that is, the thread end of reaching the standard grade can't break away from from the line capture unit, and it is bad etc. then can to produce the action of cloth offset (making the shape skew), tangent line, device, thereby can't obtain stable stitching.
Here, the so-called cloth back side refers to load the face as the needle plate side of the cloth of object to be sewn on needle plate when making.
According to Figure 32 to Figure 35, can't describe particularly from the situation that aforementioned line capture unit breaks away from for the wire loop of reaching the standard grade.
In existing thread holding device 101, descend (pin falls) if be used to form the suture needle of the stitching of initial (the first stitch) of making beginning, then suture needle N moves up and down path NL decline along it.At this moment, suture needle N is to insert the state of the T that reaches the standard grade among near the through wires hole Na being arranged at its leading section, and thorn is through the cloth C of the upper mounting of needle plate P of the upper configuration of pedestal part MB, drops to the below of the pin hole Pa of needle plate P.
The decline of this suture needle N is carried out through being arranged on the line capture unit 103 of the plane frame shape on the 1st hold assembly 102.And, if suture needle N rises, then form the wire loop TL that reaches the standard grade.This wire loop TL that reaches the standard grade is provoked by the most advanced and sophisticated Ka by still K, becomes the sagging state of front end Ta, and the T that reaches the standard grade is caught in the inside of line capture unit 103.This line capture unit 103 is after T is reached the standard grade in seizure, the side that moves up and down path NL to suture needle N is left, afterwards between the 1st clamping part 104 of the part of the inner surface 103a that consists of line capture unit 103 and the 2nd clamping part 106 that is arranged on the 2nd hold assembly 105 and disposes in the mode relative with the 1st clamping part 104, the clamping T (Figure 32) that reaches the standard grade.
Under this state, (pin falls) predefined number of times, for example once or twice if suture needle further descends, then reach the standard grade T can with the not shown knotting of rolling off the production line, form stitching at the cloth C that loads on needle plate P.And the pin that falls (the 3rd stitch or the 4th stitch) after reach the standard grade T and the knotting of rolling off the production line is decontroled the T that reaches the standard grade of clamping between the 1st clamping part 104 and the 2nd clamping part 106 before, forms successively stitching under this state.In addition, the front end Ta of the T that reaches the standard grade is by extracting from line capture unit 103 with the feeding of the carrying out of making cloth C together.
Here, if at the 1st stitch place, the part through line capture unit 103 that is clamped in the T that reaches the standard grade between the 1st clamping part 104 and the 2nd clamping part 106 is thread end TA, be positioned on the lifting path of the later wire loop TL that reaches the standard grade of the 2nd stitch, for example drop on still K most advanced and sophisticated Ka through on the path, then thread end TA can enter the inside (Figure 33) of the wire loop TL that reaches the standard grade of the 2nd stitch.
At this moment, the length of the thread end TA of the T that reaches the standard grade of clamping between the 1st clamping part 104 and the 2nd clamping part 106, in detail, reach the standard grade T from retaining part to front end Ta till length (below, be designated as " line end length "), compare in the longer situation with the distance till the needle falling point DP from retaining part to cloth C of the T that reaches the standard grade, the thread end TA of T of reaching the standard grade becomes the state that enters among the wire loop TL that reaches the standard grade, by utilizing not shown Libra to promote the T that reaches the standard grade, make the thread end TA of the T that reaches the standard grade be raised (Figure 34) with the wire loop TL that reaches the standard grade.
Therefore, the lifting of T is finished if reach the standard grade, the front end Ta side of thread end TA of then passing the T that reaches the standard grade of line capture unit 103 can be sewed up among the stitching S at the cloth back side, form pass line capture unit 103 wire loop W (different from the wire loop TL that reaches the standard grade that is used to form stitching S) (Figure 35).
Even by making the 1st clamping part 104 separate each other the T that reaches the standard grade that decontrols clamping with the 2nd clamping part 106, this wire loop W can not break away from from line capture unit 103 yet, catch 103 states that twine but become with line, therefore by with the increase of pin number, the feeding of the carrying out of namely making cloth C together, therefore this wire loop W is pulled or pulls cloth C by cloth C, and it is bad etc. to produce the action of cloth offset (making the shape skew), tangent line and device.
In addition, " the line end length " of the T that reaches the standard grade during by thread holding device 101 clamping is mainly determined by following 6 key elements:
1. the T that reaches the standard grade that makes when beginning is from through wires hole Na to front end Ta length (below, be designated as " intubating length "):
1-1. " intubating length " of the T that reaches the standard grade in last stitch cycle behind the tangent line
The tension force (adjusted value) of the T that reaches the standard grade during → tangent line/cloth C and the resistance between the T etc. of reaching the standard grade;
1-2. under the situation of thread-changing etc. of T is reached the standard grade in existence, (being caused by the operator) reach the standard grade T " intubating length ";
2. reach the standard grade at the 1st stitch place resistance between T and the cloth C;
3. reach the standard grade at the 1st stitch place resistance between T and the Sewing machines suture path components (needle bar guide part, pin hole guide portion, arm line guide part etc.);
4. the tension force that applies to the T that reaches the standard grade of the 1st stitch (tension force that is caused by common line adjustment: adjusted value);
5. the tension force of line taking spring, stroke (adjusted value);
6. the thickness of the length of the stitching S of the 1st stitch, cloth C.
Here, for key element 2,5, in the larger situation of the resistance between T and the cloth C of reaching the standard grade, can not resist the resistance of reaching the standard grade between T and the cloth C when reaching the standard grade by the Libra lifting, the amount of movement that the line taking spring moves increases, its result, the amount of reaching the standard grade that is raised reduces, and the length of the T that reaches the standard grade that the cloth back side is residual is elongated.As a result, reach the standard grade " the line end length " of T is elongated.
For key element 3, to change as long as no standard component, it is constant that " the line end length " of the T that then reaches the standard grade keeps, and can not produce fluctuation.In addition, so-called standard component can be enumerated the suture path components such as needle bar guide portion, pin hole guide portion, arm line guide portion.In addition, so-called standard component is changed, refer to thick material make wait in each thread path standard component of replacing.
For key element 4, the line tension when T is reached the standard grade in clamping be controlled to be with make tension value compare high, thereby the fluctuation of the T that suppresses to reach the standard grade " line end length ".In addition, the line tension when T is reached the standard grade in so-called clamping is line tension during T of reaching the standard grade that catches the 1st stitch, for example makes it instantaneously make it stable after maximum tension improves.In addition, what is called is made tension value, the tension force when referring to normally making after the 2nd stitch.
For key element 6, because the 1st hold assembly 102 is after the 1st stitch place catches the T that reaches the standard grade by line capture unit 103, when the 2nd stitch by the clamping T that reaches the standard grade with the co-operating of the 2nd hold assembly 105, if therefore the length of stitching S is longer, the thickness of cloth C is thicker, the T that then reaches the standard grade is consumed, the T that reaches the standard grade when T is reached the standard grade in clamping " line end length " shortens, but in most cases can predict this situation and be adjusted into longer with " intubating length ", if making the little spacing that begins to arrange the tie lines seam, or the thickness attenuation of cloth C, " the line end length " of the T that then reaches the standard grade is elongated.
In addition, if object to be sewn changes, the meetings such as the resistance between T and the cloth C, the length (making spacing) of stitching S and the thickness of cloth C of then reaching the standard grade change, and have quality or characteristic because of reach the standard grade T or cloth C, the situation of change in resistance when at every turn making.Therefore, change according to sewing condition or its condition, " intubating length " of making the T that reaches the standard grade of beginning can change, and accompanies therewith, and the T that reaches the standard grade " line end length " also can change.Consider safety in a lot of situations and when changing suture, will also decide slightly longly by " intubating length " that the operator sets.
And in " intubating length " of making beginning short situation, thread end TA can break away from from the line capture unit 103 of the 1st hold assembly 102 before T is reached the standard grade in clamping, thereby can't clamping reaches the standard grade T.Therefore, the line capture unit 103 that makes the 1st hold assembly 102 moves up and down path NL near suture needle N's, even in " intubating length " short situation, also can catch clamping and reach the standard grade.
But, in the above-described configuration, online capture unit 103 be positioned at suture needle N move up and down path NL near, make in " intubating length " long situation in wittingly (adjustments) or because of fluctuation, reaching the standard grade to understand after the 2nd stitch be sewed up the cloth back side and be formed wire loop W.
And, in existing line holding device 101, " line end length " at the T that reaches the standard grade is compared in the longer situation with retaining part to the distance of the needle falling point DP of cloth C from the T that reaches the standard grade, the time of clamping (pin number) is more, the wire loop TL that reaches the standard grade more can pass through repeatedly, therefore thread end TA is raised, and is sewed up frequency gets higher.
In addition, can also be after T be reached the standard grade in the 2nd stitch place clamping, keep clamp position on one side, make on one side line capture unit 103 move to suture needle N move up and down path NL away from the position, on the lifting path of the wire loop TL that reaches the standard grade after the 2nd stitch, for example make the thread end TA of the T that reaches the standard grade of clamping and still K away from, but in this case, the T that reaches the standard grade of clamping is moved, can become the main cause of cloth offset or tangent line if chucking power is strong, if chucking power a little less than could in the short situation of the thread end TA of the T that reaches the standard grade, break away from from retained part.
Therefore, seek following Sewing machines, that is, even sewed up in the stitching at the cloth back side and form in the situation of the wire loop that passes the line capture unit in the front of the thread end of reaching the standard grade of clamping, wire loop is broken away from from the line capture unit.
The object of the invention is to, even sewed up in the stitching at the cloth back side and form in the situation of the wire loop that passes the line capture unit in the front of the thread end of reaching the standard grade that clamping, also can wire loop be broken away from from the line capture unit.
The thread holding device of the Sewing machines of the present invention that technical scheme 1 relates to,
It has grip unit, and this grip unit has: the 1st hold assembly, and it forms notch part, inserts reaching the standard grade of linking to each other with suture needle in this notch part; And the 2nd hold assembly, its be configured to can with respect to aforementioned the 1st hold assembly contact/away from, clamping is aforementioned between itself and aforementioned the 1st hold assembly reaches the standard grade,
When making beginning, the aforementioned thread end of reaching the standard grade of this thread holding device clamping below needle plate after the pin that falls of regulation pin number, is decontroled aforementioned thread end,
It is characterized in that,
Aforementioned the 1st hold assembly has: the 1st clamping part, and it is configured to, and the peristome that is formed by aforementioned notch part is opened and closed; And preload unit, it carries out pretension to the 1st clamping part, so that aforementioned peristome is closed,
Aforementioned the 2nd hold assembly has the 2nd clamping part, and it is configured to can be with respect to aforementioned the 1st clamping part contact/away from, the aforementioned thread end of clamping between itself and aforementioned the 1st clamping part.
In addition, what technical scheme 2 related to the invention is characterized in, in the thread holding device of technical scheme 1 described Sewing machines, the 1st hold assembly also has installation portion, and aforementioned the 1st clamping part is with respect to aforementioned installation portion, and is rotatably supported.
And, what technical scheme 3 related to the invention is characterized in, in the thread holding device of technical scheme 1 or 2 described Sewing machiness, under the state of aforementioned the 1st clamping part with the peristome closure of aforementioned notch part, aforementioned notch part and aforementioned the 1st clamping part form the frame that the suture needle of the pin hole that has run through aforementioned needle plate can be passed through.
And, technical scheme 4 described the invention is characterized in, in the thread holding device of technical scheme 1 or 2 described Sewing machiness, has driver element, it makes aforementioned grip unit move to following position: initial position, in this position, aforementioned opening moves up and down on the path in aforementioned, and aforementioned the 1st clamping part and aforementioned the 2nd clamping part to move up and down the path relative in both sides across aforementioned; And clip position, in this position, aforementioned the 1st clamping part and aforementioned the 2nd clamping part leave to the aforementioned side that moves up and down the path, and between aforementioned the 1st clamping part and aforementioned the 2nd clamping part the aforementioned thread end of clamping.
And, technical scheme 5 described the invention is characterized in, in the thread holding device of technical scheme 4 described Sewing machiness, aforementioned driver element also makes aforementioned grip unit move to ejected position, in this position, aforementioned the 1st clamping part and aforementioned the 2nd clamping part further leave to the aforementioned side that moves up and down the path from aforementioned clip position, and aforementioned the 1st clamping part and aforementioned the 2nd clamping part are decontroled aforementioned thread end.
And what technical scheme 6 related to the invention is characterized in, in the thread holding device of technical scheme 1 or 2 described Sewing machiness, the pretightning force regulon is set, and it is for the pretightning force of regulating aforementioned preload unit.
And, what technical scheme 7 related to the invention is characterized in, in the thread holding device of technical scheme 1 described Sewing machines, aforementioned preload unit has and is allowing that when aforementioned the 1st clamping part applies aforementioned tension force of reaching the standard grade aforementioned the 1st clamping part opens the pretightning force of aforementioned peristome.
The effect of invention
Thread holding device according to the Sewing machines that the present invention relates to, the front of the thread end of reaching the standard grade of clamping is sewed up in the stitching at the cloth back side and is formed in the situation of the wire loop that passes notch part (line capture unit) between the 1st clamping part (open-close body) and the 2nd clamping part, can make the wire loop action that forms by with the feeding of the carrying out of making cloth together, make the 1st clamping part section of making a breach with the power that utilize to pull the 1st clamping part, thereby wire loop is broken away from.Can realize being used for opening and closing by simple structure the structure of above-mentioned notch part, the accident of the wrap wire capture unit that prevents from when making, reaching the standard grade etc.
Description of drawings
Fig. 1 is the part cut-out outward appearance front view of wanting section of Sewing machines of the embodiment of the thread holding device of expression with the Sewing machines that the present invention relates to.
Fig. 2 is the oblique view of wanting section's structure of the thread holding device of presentation graphs 1.
Fig. 3 is the exploded perspective view of Fig. 2.
Fig. 4 is the amplification exploded perspective view of the 1st clamping part of Fig. 3.
Fig. 5 is the top view of the guided plate of reaching the standard grade of the container mechanism of Fig. 1.
Fig. 6 is the front view of middle still of the container mechanism of Fig. 1.
Fig. 7 is the local oblique view of wanting section of the structure of part under the pin of Sewing machines of presentation graphs 1.
Fig. 8 is the front view of wanting section that the upper line clamping unit of the thread holding device of Fig. 1 is positioned at the state of initial position.
Fig. 9 is the partial enlarged drawing of wanting section of the upper line clamping unit of Fig. 8.
Figure 10 is the upward view of wanting section of the thread holding device of Fig. 8.
Figure 11 is the partial enlarged drawing of wanting section of Figure 10.
Figure 12 is the side view of wanting section that the upper line clamping unit of the thread holding device of Fig. 1 is positioned at the state of clip position.
Figure 13 is the upward view of wanting section that the upper line clamping unit of the thread holding device of Fig. 1 is positioned at the state of clip position.
Figure 14 is the side view of wanting section that the upper line clamping unit of the thread holding device of Fig. 1 is positioned at the state of ejected position.
Figure 15 is the upward view of wanting section that the upper line clamping unit of the thread holding device of Fig. 1 is positioned at the state of ejected position.
The key diagram of Figure 16 relation that to be expression change from the wobbling action of the relative position regulating connecting rod body of the thread holding device of beneath Fig. 1, with the relative position of the 1st hold assembly and the 2nd hold assembly.
Figure 17 is the block diagram of wanting section of control system of the Sewing machines of presentation graphs 1.
Figure 18 is the flow chart of the Sewing machines action of Fig. 1.
Figure 19 is that the upper line clamping unit of the thread holding device of presentation graphs 1 is positioned at clip position and the thread end of reaching the standard grade is in the key diagram of the state midway that the wire loop of reaching the standard grade by the 2nd stitch promotes.
Figure 20 is that the thread end of reaching the standard grade of expression after Figure 19 sewed up the stitching at the cloth back side and form the key diagram of the state of the wire loop by the line capture unit.
Figure 21 is that the upper line clamping unit of expression after Figure 20 is positioned at ejected position and removes after the thread end of reaching the standard grade, and wire loop does not break away from and do not make the key diagram of the state that cloth and line capture unit link to each other by wire loop from the line capture unit.
Figure 22 is that expression Figure 21 utilizes the feeding of the cloth that accompanies with the carrying out of making to make the line capture unit become open mode afterwards, and wire loop makes the key diagram of the state of the 1st clamping part action.
Figure 23 is that expression is from the key diagram of the operating state of the 1st clamping part of the thread holding device of Figure 22 of beneath.
Figure 24 represents that Figure 22 utilizes the feeding of the cloth that accompanies with the carrying out of making afterwards, and wire loop is from the key diagram of the state of line capture unit disengaging.
The key diagram of Figure 25 state that to be expression break away from from the wire loop of Figure 24 of beneath from the line capture unit.
Figure 26 is the front view of wanting section that the upper line clamping unit of Sewing machines of other embodiment of the thread holding device of expression with the Sewing machines that the present invention relates to is positioned at the state of initial position.
Figure 27 is the upward view of wanting section of the thread holding device of Figure 26.
Figure 28 is the top view of the guided plate of Figure 26.
Figure 29 is the key diagram that the pressure motor unit of the thread holding device of expression Figure 26 makes the state of the 1st clamping part action.
Figure 30 is that expression is from the key diagram of the operating state of the 1st clamping part of the thread holding device of beneath Figure 29.
The key diagram of Figure 31 state that to be expression break away from from the wire loop of Figure 29 of beneath from the line capture unit.
Figure 32 is the key diagram of the state of reaching the standard grade of the clamping in the thread holding device of existing Sewing machines.
Figure 33 is that the thread end in the thread holding device of the existing Sewing machines of expression enters the key diagram of the state of the wire loop inside of reaching the standard grade.
Figure 34 is the key diagram of the state that is raised simultaneously of the expression thread end of reaching the standard grade after Figure 33 and the wire loop of reaching the standard grade.
Figure 35 is that thread end that expression is reached the standard grade after Figure 34 is sewed up in the stitching at the cloth back side and forms the key diagram of the state of the wire loop by the line capture unit.
The specific embodiment
Below, the embodiment explanation the present invention shown in reference to the accompanying drawings.
According to Fig. 1 to Figure 25, the Sewing machines of the thread holding device of the Sewing machines that used present embodiment (below, referred to as thread holding device) is described.
(the whole schematic configuration of Sewing machines)
As shown in Figure 1, the Sewing machines 1 of present embodiment, as current known shown in, integral body forms roughly コ word shape, it has: pedestal part 2; Link body section 3, it is arranged at the rear portion shown in the right side of Fig. 1 of pedestal part 2, upward outstanding the setting; Arm 4, it extends setting from this top that links body section 3 to the place ahead shown in the left side of Fig. 1 abreast with pedestal part 2.
In addition, the Sewing machines 1 of present embodiment has the basic structure of cylindrical base Sewing machines, that is, the leading section of pedestal part 2 forms roughly tubular, and the width of aftermentioned X-direction is compared with other position and arranged narrowlyer simultaneously.
Here, for convenience of explanation, with suture needle N described later move up and down direction as Z-direction, with the direction of Z-direction quadrature in, the length direction of pedestal part 2 and arm 4 is as Y direction, with the direction of Z-direction and the two quadrature of Y direction as X-direction.
Aforementioned Sewing machines 1 has: suture needle N, and the leading section that it is arranged on arm 4 utilizes the driving force of sewing machine electromotor 5 (Figure 17) to move back and forth at above-below direction; The not shown supply source of reaching the standard grade, it is arranged at the top of arm 4, is used for supplying with the T that reaches the standard grade to suture needle N; Line adjusting device 6, it is reached the standard grade between supply source and the suture needle N at this, with the ordinance load clamping T that reaches the standard grade, to the mobile resistance that produces of this direction of feed; It scale device, it utilizes Libra 7, between this line adjusting device 6 and suture needle N with the reach the standard grade lifting of T of the timing of regulation; Needle plate 8, the upper surface that it is arranged on pedestal part 2 is provided with the pin hole 8a (Fig. 7) that the leading section that makes suture needle N inserts; Container mechanism 9, the below that it is arranged on the inside of pedestal part 2 and is positioned at needle plate 8, have vertical half cycle rotating kettle, this vertical half cycle rotating kettle hooks the wire loop TL (Fig. 6) that reaches the standard grade from the suture needle N that descends, and inserts simultaneously not shown rolling off the production line in this reaches the standard grade wire loop TL; Thread holding device 10, its between needle plate 8 and container mechanism 9, the clamping of the thread end TA of the T that when the 1st stitch of suture needle N rises, reaches the standard grade; Not shown thread cutting device, it is arranged on the inside of pedestal part 2, cuts off the T and rolling off the production line of reaching the standard grade after making; And control module 11, it carries out the control (Figure 17) of each several part action described later.
Aforementioned suture needle N, the front end shown in below Fig. 1 form above slightly through wires hole Na (eyelet: Fig. 7) so that the T that reaches the standard grade can insert among this through wires hole Na.In addition, the base end part shown in Fig. 1 of suture needle N top via not shown pin folder, can be installed in the bottom of needle bar 12 free attaching/detaching.This needle bar 12 is configured in the free end side shown in Fig. 1 left side of arm 4, and the bottom of needle bar 12 is configured to, and is from the lower surface of the free end side of arm 4, outstanding to the needle downing position of pedestal part 2, outstanding to the pin hole 8a of needle plate 8 in detail.And, needle bar 12 is connected with not shown needle bar driving mechanism, this needle bar driving mechanism forms, can make the bottom that the needle bar 12 of suture needle N is installed, the rotating gang of the not shown machine spindle that is driven in rotation with the driving force of utilizing sewing machine electromotor 5, with the cycle of regulation and stroke according to the rules, move back and forth at above-below direction.
In aforementioned sewing machine electromotor 5, be provided for simultaneously detecting the encoder 13 (Figure 17) of its rotatable phase angle, it is 0 ° in the time of can being positioned at top dead-centre take suture needle N, and output shaft from current sewing machine electromotor 5 to control module 11 that export is arranged in which angle position of 0～360 °.
Aforementioned Libra 7 is provided with the not shown bullport that inserts the T that reaches the standard grade, and it promotes the T that reaches the standard grade among the through wires hole Na that is inserted in suture needle N when rising thereon by moving up and down under the state that inserts at the T that reaches the standard grade.In addition, day scale device Libra 7 was moved up and down with the cycle identical with suture needle N, but Libra 7 is positioned at the timing of top dead-centre, is set as to compare a little with the moment that suture needle N is positioned at top dead-centre to postpone.
As shown in Figure 8, container mechanism 9 has: middle still 16, it carries out oscillating motion (alternatively repeatedly carrying out rotatablely moving and rotatablely moving to the reciprocal half cycle that the half cycle of reverse rotational direction rotatablely moves to the half cycle of direct rotational direction), utilizes along the outstanding tip 15 of Zhou Fangxiang and catches the wire loop TL that reaches the standard grade; Large still 17, still 16 during it can support with rotating freely; The guided plate 18 of reaching the standard grade, it is arranged on the top of large still 17; And still axle 19, it extends on the length direction of pedestal part 2 abreast from linking body section 3 sides towards large still 17, and via not shown driver, centering still 16 applies wobble drive power (only diagram is a part of in Fig. 1).
Aforementioned middle still 16 forms railway line outstanding structure section 20 along its periphery, so that wobbling action can carry out repeatedly, has the rubbing surface 21,22 with the support slot 17a sliding-contact of large still 17 in its both sides.In addition, most advanced and sophisticated 15, be formed on the end of railway line outstanding structure section 20, the half cycle spinning movement of a direction of still 16 in can utilizing, by the positive side through the through wires hole Na of the suture needle N that enters from the bullport 18a of the guided plate 18 of reaching the standard grade, provoke the wire loop TL that reaches the standard grade.Therefore, most advanced and sophisticated 15 leading section form deflection along in the shape of a direction L of rotation RL of still 16, simultaneously most advanced and sophisticated 15 and outstanding structure section 20, be configured in another direction R side along rotation RL with respect to the path NL that moves up and down of suture needle N.
In addition, still axle 19, with respect to middle still 16 be positioned at the R side (below, with direction R side as still axle side), although do not have directly to link with not middle still 16, via being arranged at the driver that carries out on the middle still 16, simultaneously oscillating motion, transmit for the driving force of carrying out oscillating motion to middle still 16.
The still axle 19 of aforementioned container mechanism 9, abreast configuration is positioned at the Y direction rear side with respect to middle still 16 on Y direction, simultaneously can from this direction apply make still 16 driving force of carrying out oscillating motion.In addition, still axle 19 can make the driving force that branches out from sewing machine electromotor 5 be transformed to wobble drive power and transmit, and the oscillating motion of the reciprocating motion of direction and middle still 16 is synchronous with the phase difference of regulation up and down can to make suture needle N.
The aforementioned guided plate 18 of reaching the standard grade, to contact with the rubbing surface 21,22 of still 16 for the T that prevents from reaching the standard grade, or the plate-shaped member that enters to the sliding surface (contact-making surface) between large still 17 and the rubbing surface 22, if observe from the top shown in the arrow mark U of Fig. 8, then as shown in Figure 5, be provided with bullport 18a, it is shaped as, the end of Y direction rear side is expanded to the X-direction both sides, the end of Y direction front side is expanded to the right, be provided with the 18b of separated time section at this bullport 18a, it is used for the wire loop TL that reaches the standard grade that expansion is provoked by the tip 15 of still 16.
Such as Figure 6 and Figure 7, utilization is at tip 15 that the direction shown in the arrow mark E of Fig. 7 is rotated and the wire loop TL that reaches the standard grade that is provoked, utilize the 18b of this separated time section, take most advanced and sophisticated 15 as the boundary, the TB that reaches the standard grade of reach the standard grade TF and the cloth side of suture needle N side separates on fore-and-aft direction significantly, prevents two rubbing surfaces 21,22 the contact with respect to middle still 16 or is involved in.
(structure of thread holding device)
Aforementioned thread holding device 10, make the stitching S of beginning in order to form reliably, the thread end TA that namely prevents from making the T that reaches the standard grade of beginning pulls away from cloth C, below needle plate 8 and in the position that path NL leaves that moves up and down from suture needle N, catch and be clamped in the thread end TA of the T that reaches the standard grade among the suture needle N at the 1st stitch place of making beginning, simultaneously, after the predefined pin number of the pin that falls after this, decontrol the thread end TA of the T that reaches the standard grade of clamping.
The thread holding device 10 of present embodiment has: upper line clamping unit 26, its have can relatively contact/away from the 1st clamping part 24 and the 2nd clamping part 25, they are used for catching the thread end TA of the T that reaches the standard grade and clamping (below, referred to as grip unit); And driver element 27, it is used for driving this grip unit 26.This driver element 27 also has mobile unit 28 and linkage unit 29.
Aforementioned mobile unit 28 can make grip unit 26 at initial position, clip position, and mobile between the ejected position, what this initial position was positioned at suture needle N moves up and down the upper (Fig. 8～Figure 11) of path NL, this clip position from this initial position with respect to suture needle N to move up and down path NL (parallel with Z-direction, the path that the front position of the suture needle N of the front position of suture needle N in the time of will be from top dead-centre during to bottom dead centre links) rearward (links body section 3 sides) away from (Figure 12, Figure 13), this ejected position is compared further rearward (linking body section 3 sides) away from (Figure 14 with this clip position, Figure 15).In addition, mobile unit 28 moves grip unit 26 to clip position from initial position when making beginning, stop behind the predefined pin number of the pin that falls, and moves to ejected position from clip position afterwards.
Aforementioned linkage unit 29, when grip unit 26 is positioned at initial position, the 2nd clamping part 25 is compared the position that is configured in binding body section 3 sides with the path NL that moves up and down of suture needle N, simultaneously the 1st clamping part 24 is configured in the position relative with the 2nd clamping part 25 across the path NL that moves up and down of suture needle N, make the mechanically moving ground interlock of the 1st clamping part 24 and the 2nd clamping part 25 and mobile unit 28, so that when grip unit 26 moves from initial position to clip position, the 1st clamping part 24 and the 2nd clamping part 25 are moved and the clamping of the thread end TA of the T that reaches the standard grade to the direction that approaches, when grip unit 26 is moved to ejected position, make the 2nd clamping part 25 from the 1st clamping part 24 away from and decontrol the thread end TA of the T that reaches the standard grade of clamping.
That is, the driver element 27 of present embodiment constitutes, and can make grip unit 26 actions, optionally to be positioned at initial position, clip position, these three positions of ejected position.
Here, the thread holding device 10 for present embodiment is described in detail as follows.
(grip unit of thread holding device)
Fig. 2 is the main integrally-built oblique view of expression thread holding device, and Fig. 3 is the exploded oblique view of Fig. 2.
As shown in Figures 2 and 3, the grip unit 26 of present embodiment has: the 1st hold assembly 31, and it has the 1st clamping part 24; And the 2nd hold assembly 32, it has the 2nd clamping part 25.This all parts 31,32, its global shape is long strip-board shape, they and all make under its length direction state parallel with Y direction so that the 2nd hold assembly 32 is in the mode of top overlaps, and both can be supported on the linkage unit 29 slidably along Y direction (fore-and-aft direction).
In addition, in the explanation of the each several part of grip unit 26, in the situation of expression direction, except making an exception, represent that all grip unit 26 is supported on the direction under the state on the linkage unit 29.
As shown in Figure 4, the 1st hold assembly 31 is that leading section arranges line capture unit 33 at the Y direction front side.This line capture unit 33 is made of notch part 34 and opening-closing plate (open-close body) 35.Aforementioned notch part 34 forms along the long planar rectangular shape of fore-and-aft direction, thereby is formed on the peristome 34A of front side (front) opening of aforementioned fore-and-aft direction.On the right side of the front end of aforementioned the 1st hold assembly 31, the installation portion (opening-closing plate is with board is installed) 36 that roughly is triangular shape is overlooked in outstanding formation, at the upper surface installation step screw (opening-closing plate support component) 37 of this installation portion 36.
Aforementioned opening-closing plate 35, the occlusive part 35a with elongate are with can inaccessible aforementioned peristome 34A, and it can be supported on base end part on the stage portion of aforementioned stepped screw 37 with rotating freely.
Aforementioned line capture unit 33, under the closure state of the occlusive part 35a of opening-closing plate 35 with the opening closure of notch part 34, the whole frame shape that forms runs through suture needle N among the pin hole 8a of needle plate 8 through in this frame shape.
In addition, at aforementioned stepped screw 37 torsion-coil spring 38 (preload unit) is installed.This torsion-coil spring 38 is configured in the upper surface side of opening-closing plate 35, and an end hangs on the fastening groove 39 that is formed on the opening-closing plate 35, and the other end hangs over the periphery of giving prominence to upward the pin-shaped carbine hanging body 40 that arranges at the upper surface of installation portion 36.And the elastic force of torsion-coil spring 38 makes opening-closing plate 35 rotation, and the front end by making aforementioned occlusive part 35a and the anterior end surface butt of the 1st hold assembly 31 can remain on the closure state with line capture unit 33 closures.In addition, the medial surface of the occlusive part 35a relative with the space of notch part 34 consists of the 1st clamping part 24, the clamping T that reaches the standard grade between itself and the 2nd clamping part 25.That is, the 1st clamping part 24 forms the part of the occlusive part 35a of opening-closing plate 35.And the front end of occlusive part 35a forms fillet part 41, and it forms plane semicircle shape, flat circle arcuation etc.
In addition, being positioned on the upper ora terminalis and lower ora terminalis with notch part 34 relative sides of occlusive part 35a, the chamfering of semicircle shape preferably is set respectively, its meaning is as described later, at wire loop W from occlusive part 35a, namely the 1st clamping part 24 can prevent from cutting off suture while contacting when pulling away.
Therefore, opening-closing plate 35 forms, and always utilizes the pretightning force of torsion-coil spring 38 that line capture unit 34 is remained on closure state.
Keep the pretightning force of the torsion-coil spring 38 of aforementioned opening-closing plate 35 in the mode of the opening of inaccessible notch part 34, compare with the power (load) of the 2nd clamping part 25 butts the 1st clamping part 24 described later, form greatlyr.
Certainly, the 1st clamping part 24 that consists of the part of opening-closing plate 35 forms movably, so that under applying situation greater than the load of the pretightning force of torsion-coil spring 38 from inboard direction laterally on the online capture unit 33, line capture unit 33 makes opening-closing plate 35 become open mode centered by stepped screw 37.
Namely, as described later, form wire loop W and can't break away from from grip unit 26 at the thread end TA of the T that reaches the standard grade of clamping, and increase with the pin number and to make cloth C feeding, thereby when the T that reaches the standard grade is applied larger tension force, it can move, and the tension force of T is applied on the 1st clamping part 24 and by the 1st clamping part 24 and then by the make a breach opening of section 34 of opening-closing plate 35 so that this is reached the standard grade.
Therefore, the 1st clamping part 24 movably forms, so that after T is reached the standard grade in clamping, can make by reaching the standard grade opening-closing plate 35 opening of section 34 of making a breach, thereby make line capture unit 33 become open mode.
The spring carrier arm body 40 of the other end of the aforementioned torsion-coil spring 38 of hook arranges a plurality of, arranges in the present embodiment two, can regulate the pretightning force of torsion-coil spring 38.
Utilization arranges a plurality of aforementioned spring carrier arm bodies 40, in the present embodiment two structure is set, and is configured for regulating the pretightning force regulon 42 of the pretightning force of torsion-coil spring 38.
The notch part 34 of present embodiment also moves the guide portion that guides as the fore-and-aft direction to the 2nd clamping part 25 of the 2nd hold assembly 32 and works.
In addition, as the shape of notch part 34, need correspondingly with design concept etc., also can form the shape outside the planar rectangular, for example the bottom is made as the roughly roughly U word shape of circular-arc or semicircle shape, is not particularly limited the rectangular shape of overlooking for present embodiment.
In addition, as occlusive part 35a, be not limited only to four jiaos bar-shaped, also can be that the polygonal angle of pole shape, section of section circle is bar-shaped.But preferred front end is circular, can prevent from cutting off suture.
As shown in Figures 3 and 4, on the rear end of the Y direction rear side that is positioned at the 1st hold assembly 31, form along the long through hole of overlooking rectangle 43 of fore-and-aft direction.In this through hole 43, dispose the extension spring 44 of linkage unit 29 described later, form the operating space that it stretches.An end that links extension spring 44 at the leading section of this through hole 43.In addition, on the Y direction pars intermedia of the 1st hold assembly 31 position after slightly partially, be provided with and extend to the right the bracket part 45 that arranges, at its leading section, the engagement pin 46 of the pole shape that extends downwards so that its front end fixedly mount towards the mode of below.And linkage unit 29 is via the locomotivity of engagement pin 46 to the 1st hold assembly 31 input fore-and-aft directions.
As shown in Figure 3, the 2nd hold assembly 32 is split into front side portion 48 and rear sides 49 these two parts, and they are linked by union body 50 and shape all-in-one-piece long strip-board shape roughly.And, at the leading section of front side portion 48 the 2nd clamping part 25, the 2 clamping parts 25 are set and have: clamping face 25a, its can with respect to the 1st clamping part 24 contacts of line capture unit 33 parts that consist of closure state/away from; And bend 25b, it compares forwards outstanding through the below of the 1st clamping part 24 with respect to the 1st clamping part 24 butt the time with the front end face of the 1st hold assembly 31.
Therefore form, relative to action by between the 1st hold assembly 31 and the 2nd hold assembly 32 makes the T that reaches the standard grade that inserts from the top the line capture unit 33 of the 1st hold assembly 31, can be by the 1st clamping part 24 and 25 clampings of the 2nd clamping part.In addition, the T that reaches the standard grade that is held can utilize the bend 25b that forwards extends from the bottom of clamping face 25a forwards to bend, and becomes the in the past crooked state in direction below of T of reaching the standard grade that makes.Its result, the thread end TA of the T that reaches the standard grade utilizes bend 25b and the state in the place ahead hangs down to be positioned at more, so compare with the still 16 of the container mechanism 9 that is arranged in its below, the position forwards is offset, and can prevent with respect to the contact of middle still 16 or is involved in.
In addition, as the 1st clamping part 24 and the 2nd clamping part 25, also can form the clamping face 25a that makes the 1st clamping part 24 and the 2nd clamping part 25 via the shape of the T butt of reaching the standard grade, such as the bending of flat circle arcuation etc.
Aforementioned rear sides 49 forms through hole 51 along fore-and-aft direction, the 2nd hold assembly 32 and the 1st hold assembly 31 are supported on situation on the linkage unit 29 with overlapping state under, through hole 51 overlaps with the through hole 43 of aforementioned the 1st hold assembly 31, the extension spring 44 of inboard configuration linkage unit 29 at them forms the operating space that it stretches.The other end that links extension spring 44 in the rearward end of this through hole 51.
Therefore, the 2nd hold assembly 32 becomes the state that links via extension spring 44 and the 1st hold assembly 31, and the 1st clamping part 24 of the 1st hold assembly 31 and the 2nd clamping part 25 of the 2nd hold assembly 32 are always by to close to each other and direction butt applies pretightning force.
Pars intermedia in the Y direction of the rear sides 49 of aforementioned the 2nd hold assembly 32 is provided with and extends to the left the bracket part 52 that arranges, at its leading section, the pole shape engagement pin 53 that extends downwards so that its front end towards the installation that is fixed of the mode of below.And linkage unit 29 can be via the locomotivity of engagement pin 53 to the 2nd hold assembly 32 input fore-and-aft directions.
(mobile unit of thread holding device)
Aforementioned mobile unit 28, the 1st clamping part 24 and the 2nd clamping part 25 for grip unit 26 make it to the movement of following three positions, that is, and before making beginning, move in advance suture needle N move up and down path NL below be initial position (Fig. 8); After making beginning and when the suture needle N of the 1st stitch is pulled out from cloth, with respect to suture needle N move up and down path NL, move to the clip position (Figure 12) of comparing with initial position by rear side; And if the pin that falls (for example 2～3 pins) that presets number of times, then with respect to suture needle N move up and down path NL, move to and compare the more ejected position at rear (Figure 14) with clip position.
Therefore, mobile unit 28 has: y-axis shift actuation mechanism 55, and it makes the grip unit 26 that is supported by linkage unit 29 back and forth drive along Y direction; Detecting unit (shift position detecting unit) 56, it detects the some positions whether grip unit 26 is arranged in initial position, clip position and ejected position; And the running fix control module, it carries out the action control of y-axis shift actuation mechanism 55 based on the detection of detecting unit 56.
Aforementioned y-axis shift actuation mechanism 55 has as shown in Figure 3: clamp motor 58, and it exports rotary driving force as the drive source of driver element 27; Drive connecting rod body 59, it links the oscillation center position of self and the output shaft of clamp usefulness motor 58; Follower link body 61, it applies the locomotivity of Y direction to the regulating connecting rod body 60 of linkage unit 29; And kinematic link body 62, it is from drive connecting rod body 59 to follower link body 61 transmission of drive force.
With motor 58, for example use stepping motor as aforementioned clamp, it can be on both forward and reverse directions, with arbitrarily anglec of rotation tolerance driving by the action control of control module 11.
Aforementioned drive connecting rod body 59, one end and clamp are fixedly connected with the output shaft of motor 58, and its other end links with an end of kinematic link body 62 rotationally.
Aforementioned follower link body 61, one end axis are supported on the aftermentioned guided plate 63 of linkage unit 29, and its other end is attached on the other end of kinematic link body 62 rotationally.In addition, at follower link body 61 engaging protrusion section 64 is set, it is used for regulating connecting rod body 60 to linkage unit 29 and applies locomotivity along Y direction.
Aforementioned kinematic link body 62 disposes in the mode along Y direction roughly, forms when with the driving of motor 58 drive connecting rod body 59 being swung by clamp, and follower link body 61 is swung.
According to said structure, if clamp drives with motor 58, then when drive connecting rod body 59 swung, follower link body 61 swung, and the regulating connecting rod body 60 of linkage unit 29 is moved along Y direction.
According to Figure 10, Figure 13, Figure 15, aforementioned detecting unit 56 is described.In addition, in Fig. 2 and Fig. 3, omitted the diagram of detecting unit 56.
Aforementioned detecting unit 56 has light-emitting component and photo detector, has simultaneously: the 1st and the 2nd state sensor 66,67, and they detect and have or not veil to exist between light-emitting component and the photo detector; And shield 70, it is arranged on the kinematic link body 62 of aforementioned y-axis shift actuation mechanism 55, and has the 1st and the 2nd shaded areas 68,69.
The the aforementioned the 1st and the 2nd state sensor 66,67 disposes abreast along the mobile alignment of shield 70, and the 1st state sensor 66 is configured in rear side simultaneously.Thus, each state sensor 66,67 becomes roughly along Y direction state arranged side by side.Each state sensor 66,67 photo detector, take state that veil is arranged as the ON state, take without the state of veil as the OFF state, and the signal that can identify each state is to control module 11 outputs.
On the other hand, shield 70 is fixedly supported on the kinematic link body 62 so that for the 1st and the 2nd state sensor 66,67 the two, through between light-emitting component-photo detector.And, Y direction position and the Y direction length setting of the 1st shaded areas 68 are, so that as shown in figure 10 when grip unit 26 is positioned at initial position, between the 1st state sensor 66 and the 2nd state sensor 67, when being positioned at clip position, be positioned at as shown in figure 13 the position of covering the 1st state sensor 66, when being positioned at ejected position, still be positioned at as shown in figure 15 the position of covering the 1st state sensor 66.
The Y direction set positions of aforementioned the 2nd shaded areas 69 is, such as Figure 10, shown in Figure 13, grip unit 26 is when being positioned at initial position or clip position, any situation no matter, all compare with the 2nd state sensor 67 and be positioned at the front side, and when being positioned at ejected position, as shown in figure 15, be positioned at the position of covering the 2nd state sensor 67.
Therefore, in control module 11, can according to the 1st and the 2nd state sensor 66,67 the two be the OFF state and judge that grip unit 26 is positioned at initial position, judge that for the OFF state grip unit 26 is positioned at clip position for ON state and the 2nd state sensor 67 according to the 1st state sensor 66, according to the 1st and the 2nd state sensor 66,67 the two be ON state judgement grip unit 26 and be positioned at ejected position.
Describe for aforementioned running fix control module.
Aforementioned running fix control module is realized by control module 11, control module 11 pre-stored clamps be used to grip unit 26 is moved from initial position to clip position are with the anglec of rotation of motor 58 and anglec of rotation tolerance that it is moved from from clip position to ejected position, when grip unit 26 is positioned clamping and ejected position, carry out the action control that clamp is used motor 58 with reference to the stored angles position.
In addition, for initial position, control module 11 constitutes, when the main power source of Sewing machines 1 is connected, utilize detecting unit 56 to carry out control (initialization action processing) as the initial position control part, drive clamp with motor 58, retrieve the 1st and the 2nd state sensor 66,67 the two all become the position of OFF state, in this position standby.
In addition, if in the 1st stitch after making beginning, detecting the output shaft angle by the encoder 13 of sewing machine electromotor 5 is for example 245 °, then is identified as suture needle N and extracts upward from cloth C, carries out grip unit 26 is positioned the control as the retentive control section that reaches the standard grade of clip position.
In addition, in the Sewing machines 1 of present embodiment, be set as, at the output shaft for sewing machine electromotor 5, take the upper dead center position of suture needle N in 0 ° situation, if rotation to 245 °, then so that suture needle N through bottom dead centre and extract to the top of needle plate 8.And, according to the output of encoder 13, if detect the pin that falls of making the stated number after the beginning, then carry out decontroling the control of control part as reaching the standard grade with what grip unit 26 was positioned ejected position.Here, the pin number identification of being undertaken by the output of encoder 13 for example can be by counting to carry out to the signal output number of times of 180 ° of the expressions that obtained by encoder 13.
(linkage unit of thread holding device)
With reference to Fig. 2 to Figure 16, aforementioned linkage unit 29 is described.
Aforementioned linkage unit 29 has: as the guided plate 63 of guidance unit, it can reciprocatingly support respectively the 2nd hold assembly 32 and the 1st hold assembly 31 along Y direction; As the extension spring 44 of tension force preload unit, it is continuously applied tension force making on the 2nd clamping part 25 and the 1st clamping part 24 direction close to each other between the 2nd hold assembly 32 and the 1st hold assembly 31; Regulating connecting rod body 60, its can with swung the attitude cause by self and change correspondingly, make the 2nd clamping part 25 contact with the 1st clamping part 24/away from, and engage respectively the 2nd hold assembly 32 and the 1st hold assembly 31, input to the locomotivity of each shift position of grip unit 26 from mobile unit 28 simultaneously; The 1st butt parts 72 when it is positioned at initial position in grip unit 26, make the 2nd clamping part 25 swing with the direction that the 1st clamping part 24 separates with regulating connecting rod body 60 butts; And the 2nd butt parts 73, when it is positioned at ejected position in grip unit 26, with regulating connecting rod body 60 butts the 2nd clamping part 25 is swung with the direction that the 1st clamping part 24 separates.
Aforementioned guided plate 63 is fixedly mounted on the top of pedestal part 2, the rear of needle plate 8.
Below, when the each several part of explanation linkage unit 29, use in the situation of word of expression direction, only otherwise particularly point out, all represent the direction when guided plate 63 is fixedly mounted on state on the pedestal part 2.
Upper surface at aforementioned guided plate 63 arranges guiding groove 75, and its place, centre position on X-direction is along Y direction.In this guiding groove 75, the state that the 1st hold assembly 31 of grip unit 26 and the 2nd hold assembly 32 are stacked with the length direction alignment is accommodated, and the side is stamped pressure strip 76 from it, so that the 1st hold assembly 31 and the 2nd hold assembly 32 can not come off from guiding groove 75.Thus, the 1st hold assembly 31 and the 2nd hold assembly 32 can be directed groove 75 guiding and slide along Y direction respectively.
But as previously mentioned, because the 1st hold assembly 31 and the 2nd hold assembly 32 link via extension spring 44, so only otherwise apply external force, each parts 31,32 will be kept the state that makes the 1st clamping part 24 and the 2nd clamping part 25 butts.
Aforementioned guided plate 63 across the both sides of guiding groove 75, through hole 77,78 is set respectively.Embed the engagement pin 46 that is arranged on the 1st hold assembly 31 from the top in the through hole 77, be embedded in the engagement pin 53 of the 2nd hold assembly 32 at another through hole 78.In addition, each through hole 77,78 Y direction length all are set as, so that the relatively moving of the movement from the initial position of grip unit 26 to ejected position and the 1st hold assembly 31 that accompanies therewith and the 2nd hold assembly 32, each hole 77,78 leading section and rearward end all do not contact with each engagement pin 46,53.And, inserting each engagement pin 46,53 in each through hole 77,78, its leading section is outstanding a little from the lower face side of guided plate 63, engages with regulating connecting rod body 60 respectively.
Aforementioned regulating connecting rod body 60 with along the configuration side by side of its length direction, is provided with and the holding section 79 of the 1st hold assembly 31, and the holding section 80 of the 2nd hold assembly 32 and and the holding section 81 of the mobile unit between them 28.
That is, with the holding section 79 of the 1st hold assembly 31, be the through hole along the slotted hole shape of the length direction of regulating connecting rod body 60, engagement pin 46 is inserted.With the holding section 80 of the 2nd hold assembly 32 are manholes, engagement pin 53 is inserted.With the holding section 81 of mobile unit 28, be the through hole along the slotted hole shape of the length direction of regulating connecting rod body 60, engaging protrusion section 64 is inserted.
As shown in figure 16, the 1st hold assembly 31 and the 2nd hold assembly 32 as previously mentioned only otherwise be subjected to external force, are just kept butt state between the 1st clamping part 24 and the 2nd clamping part 25 by extension spring 44.
At this moment, with respect to the butt power between the 1st clamping part 24 that is caused by extension spring 44 and the 2nd clamping part 25, the butt power of the front end that makes opening-closing plate 35 and the 1st hold assembly 31 (openend of the notch part 34) butt that is obtained by torsion-coil spring 38 is set as fully large load.This state becomes the clamp position of the T that reaches the standard grade.And each engagement pin 46,53 set positions be, and be when the 1st clamping part 24 and the 2nd clamping part 25 are positioned at the butt state, arranged side by side in roughly the same position on Y direction.
Therefore, via these each engagement pins 46,53 and each holding section 79,80 and the regulating connecting rod body 60 that links, also can utilize the pretightning force of extension spring 44, keep in the normal state roughly the state (state shown in the solid line of Figure 16) along X-direction.
In addition, under this state, for example, if be used to Y direction locomotivity from the engaging protrusion section 64 of mobile unit 28, apply anticlockwise revolving force to regulating connecting rod body 60, then this regulating connecting rod body 60 swings, and its attitude changes.At this moment, on each holding section 79,80, by producing displacement in Y direction, between the 1st hold assembly 31 and the 2nd hold assembly 32, apply the external force that makes the direction that the 1st clamping part 24 and the 2nd clamping part 25 be separated from each other.
Therefore, the tension force of opposing extension spring 44, the 1st clamping part 24 and the 2nd clamping part 25 separate, and switch to the relieving state from the hold mode of the T that reaches the standard grade.
According to Figure 10, Figure 16, describe for aforementioned the 1st butt parts 72.
Aforementioned the 1st butt parts 72 form, the swing of regulating connecting rod body 60 is operated, so that when grip unit 26 is positioned at initial position, make the 1st clamping part 24 and the 2nd clamping part 25 become released state, when moving from initial position to clip position, the 1st clamping part 24 and the 2nd clamping part 25 are moved, butt before arriving clip position to direction close to each other.
In order to realize above-mentioned action, the 1st butt parts 72 are configured to, with respect to the regulating connecting rod body 60 that is positioned at initial position, between the holding section 80 of the holding section 81 of mobile unit 28 and the 2nd hold assembly 32, from the place ahead butt.By such configuration, for grip unit 26 is positioned initial position, and utilize 28 pairs of adjusting connecting rod bodies 60 of mobile unit to apply in the situation of locomotivity forwards, the tension force of regulating connecting rod body 60 opposing extension springs 44 and take with the contact of the 1st butt parts 72 for propping up a spot wobble.At this moment, compare during with butt, the holding section 80 of the 2nd hold assembly 32 is rearward mobile, and the holding section 79 of the 1st hold assembly 31 is forwards mobile.
Therefore, the 1st clamping part 24 is forwards mobile via the 1st hold assembly 31, and the 2nd clamping part 25 is rearward mobile via the 2nd hold assembly 32, so they become the state (double dot dash line of Figure 16) that is separated from each other.Under this state, the insertion of the T that between the 1st clamping part 24 and the 2nd clamping part 25, reaches the standard grade.
And, if grip unit 26 moves to clip position from this initial position, then because be disengaged gradually by the 1st butt parts 72 butt states with regulating connecting rod body 60 that carry out, so regulating connecting rod body 60 utilizes the tension force of extension spring 44, to rotating clockwise.
Therefore, before removing fully with the butt state of the 1st butt parts 72, regulating connecting rod body 60 is to rotating clockwise, and the 2nd clamping part 25 is forwards mobile via the 2nd hold assembly 32, and the 1st clamping part 24 is rearward mobile via the 1st hold assembly 31 simultaneously.Therefore, the clamping of the T that reaches the standard grade that is undertaken by the 1st clamping part 24 and the 2nd clamping part 25 is at the rear of the 1st clamping part 24 of initial position, the position in the place ahead of the 2nd clamping part 25 of initial position carries out.
According to Figure 13, Figure 15, describe for aforementioned the 2nd butt parts 73.
Aforementioned the 2nd butt parts 73 form, the swing of regulating connecting rod body 60 is operated, so that when grip unit 26 moves from clip position to ejected position, the 1st clamping part 24 that is in clamp position is moved again to the direction of separating with the 2nd clamping part 25.
In order to realize above-mentioned action, the 2nd butt parts 73 are configured to, when grip unit 26 moves from clip position to ejected position, with respect to the zone of regulating connecting rod body 60 processes, from right side and this regulating connecting rod body 60 sliding-contacts.
Therefore, along under the state (Figure 13) of X-direction, the 2nd butt parts 73 are with respect to the sliding contacting part 60a sliding-contact of the right-hand end that is arranged on the regulating connecting rod body 60 that approaches with ejected position roughly.Sliding contacting part 60a for this regulating connecting rod body 60, because its front side is the shape of extending gradually to the right, so after beginning in sliding-contact, regulating connecting rod body 60 is further rearward mobile, regulating connecting rod body 60 as shown in figure 15, to counterclockwise swinging, grip unit 26 arrives ejected position under this state.Swing by this, the holding section 80 of the 2nd hold assembly 32, the earth of comparing with the holding section 79 of the 1st hold assembly 31 is rearward mobile.Its result, the 1st clamping part 24 and the 2nd clamping part 25 become the state (Figure 15) that is separated from each other, and carry out the relieving of the thread end TA of the T that reaches the standard grade of maintenance between the 1st clamping part 24 and the 2nd clamping part 25.
(configuration of the 1st, the 2nd clamping part of each shift position)
Move to initial position and in the situation about being positioned, as previously mentioned, the 1st clamping part 24 and the 2nd clamping part 25 move to the direction that is separated from each other in aforementioned grip unit 26.And if arrive initial position, then as shown in Figure 8, the 1st clamping part 24 is positioned at the place ahead that moves up and down path NL of suture needle N.
In addition, the 2nd clamping part 25, the leading section of its bend 25b is positioned at the rear side of straight line M at least.This straight line M, it is definite straight line by linking following part, namely, from the rear side edge of pin hole 8a bottom (from the circular pin hole 8a of beneath, along the position of the Y direction rear end of Y direction diameter), near the rear side that moves up and down path NL of suture needle N and the upper end of a rubbing surface 22 of the rear side of the middle still 16 that disposes.
Set by the configuration to the leading section of aforementioned the 2nd clamping part 25 as mentioned above, the wire loop TL that reaches the standard grade at the 1st stitch place in making, by in the tip 15 of still 16 catch and in the situation by the 18b of the separated time section expansion (expansion) of the guided plate 18 of reaching the standard grade, can not contact with the T that reaches the standard grade because of the leading section of the 2nd clamping part 25 and hinder the 18b of the separated time section expansion wire loop TL that reaches the standard grade, the T that therefore can establishment reaches the standard grade contacts with rubbing surface 22.
In addition, the front position of the position of the 1st clamping part 24 and the 2nd clamping part 25 determines by the Y direction length of the 1st hold assembly 31 and the 2nd hold assembly 32 with respect to the butt position of the 1st butt parts 72 of regulating connecting rod body 60.For example, if the butt position of the 1st butt parts 72 near the holding section 81 of mobile unit 28, then the position of the 1st hold assembly 31 more on the front, the front position of the 2nd clamping part 25 is more by the rear.In addition, if the holding section 80 of close the 2nd hold assembly 32 in butt position, then the rear is more leaned in the position of the 1st clamping part 24, and the front position of the 2nd clamping part 25 more on the front.
In addition, as initial position, as long as line capture unit 33 be positioned at move up and down upper and the 1st clamping part 24 of path NL and the 2nd clamping part 25 via moving up and down path NL in both sides relative position.
The clip position of aforementioned grip unit 26, as shown in figure 13, be positioned at suture needle N move up and down path NL near, preferably more approaching.This is because by the clamping at the thread end TA of the T that reaches the standard grade near the position of suture needle N, can make the length of thread end TA of the T that reaches the standard grade that hangs down from grip unit 26 shorter.
In addition, Figure 13 is the reach the standard grade figure of an example of clip position of clamping of thread end TA of T of expression, clip position is positioned at the slightly side that moves up and down path NL of suture needle N, but in the present embodiment, because form the structure that the 1st clamping part 24 and the 2nd clamping part 25 move simultaneously, below suture needle N is positioned at needle plate 8 move up and down on the NL of path the time, the 1st clamping part 24 and the 2nd clamping part 25 are positioned at and the hands-off position of moving up and down of suture needle N, therefore can make clip position close to suture needle N move up and down path NL, for example can be positioned at moving up and down on the NL of path of suture needle.
In addition, the distance that moves up and down path NL from clip position to suture needle N is also determined with respect to the butt position of regulating connecting rod body 60 by the 1st butt parts 72.For example, if the butt position of the 1st butt parts 72 is near the holding section 81 of mobile unit 28, the more close path NL that moves up and down of clip position then, and, if the butt position is near the holding section 80 of the 2nd hold assembly 32, then clip position is away from moving up and down path NL.
In addition, as clip position, so long as the 1st clamping part 24 and the 2nd clamping part 25 separate the side of mobile route NL up and down, that is, the 1st clamping part 24 and the 2nd clamping part 25 from suture needle N move up and down path NL away from, the position of not interfering with suture needle N does not get final product.
Move to ejected position and in the situation about being positioned, the 1st clamping part 24 only separates the distance that can decontrol the T that reaches the standard grade with the 2nd clamping part 25 and gets final product in aforementioned grip unit 26.
In addition, for ejected position, as long as be positioned at the 1st clamping part 24 and the 2nd clamping part 25 from suture needle N move up and down path NL away from, and the position of not interfering with suture needle N get final product, but for not with make other required mechanism's interference, be set as the rear of clip position.
In addition, also can be the process that moves to clip position from initial position, the clamping of the thread end TA of the T that reaches the standard grade.
In addition, also can constitute, ejected position is not set separately, and be provided in a side of the position identical with clip position, that is, clip position reach the standard grade T thread end TA clamping and decontrol the two.
(control module)
As shown in figure 17, though control module 11 does not at length illustrate, it has: CPU (also can be MPU), and it carries out various calculation process; ROM, the various programs of the various processing usefulness such as its memory, storage are controlled, judgement; And RAM, it uses as the working storage in the various processing.And, in control module 11, connect via system bus and drive circuit etc. sewing machine electromotor 5, encoder 13, clamp with the 1st state sensor 66, the 2nd state sensor 67 of the Wire-cutting electric machine 83 of motor 58, thread cutting device, detecting unit 56, be used for input and make the starting that begins and stop/termination switch 84 etc.
Aforementioned control module 11 according to the pulse signal of encoder 13 inputs from the output shaft that is arranged on sewing machine electromotor 5, can be identified the anglec of rotation of sewing machine electromotor 5.
In addition, control module 11 according to the detection signal from the 1st state sensor 66,67 inputs of the 2nd state sensor, can be confirmed each shift position of grip unit 26.
And, if control module 11 is made commencing signal from 84 inputs of starting/termination switch, then can detect accordingly with the anglec of rotation of the sewing machine electromotor 5 of confirming, identifying or the operating position of shift position detecting unit 46, the driving of motor 58 is used in control as the clamp of the drive source of driver element 27.
In addition, as driver element 27, also can replace mobile unit 28 and linkage unit 29, use simultaneously following two kinds of structures, namely, utilize the driving force of the 1st actuator to make the integrated moving of grip unit 26, optionally being positioned at these three positions (situation that also has these two positions of initial position and clip position) of initial position, clip position and ejected position, with the driving force of utilizing the 2nd actuator make the 1st clamping part 24 relatively contact with the 2nd clamping part 25/away from action.
Below, according to Fig. 8 to Figure 25, describe for the effect of the present embodiment that is consisted of by aforementioned structure.
Figure 18 is the flow chart that explanation has the action in the embodiment of Sewing machines of the thread holding device that the present invention relates to.
(action specification of Sewing machines)
As shown in figure 18, control module 11 is carried out the detection (step S1) of initial position according to the commencing signal of making that comes self-starting/termination switch 84 by detecting unit 56.Whether this detection can be the OFF state by the 1st and the 2nd state sensor 66,67 is judged.
As previously mentioned, action control is when not shown main power source input, utilizes detecting unit 56 to make grip unit 26 be positioned initial position.Therefore, grip unit 26 is positioned at moving up and down on the NL of path of suture needle N, and the 1st clamping part 24 is positioned at the place ahead that moves up and down path NL of suture needle N, and the 2nd clamping part 25 is positioned at after a while side's (state of Fig. 8 to Figure 11) of straight line M.In addition, although pre-aligned in initial position, if but for a certain reason and the some ON states that detects in the 1st or the 2nd state sensor 66,67, then carry out mistake and process (demonstration, warning etc.) (step Sa1), end the action (step Sa2) of the each several part of Sewing machines 1, end process.
On the other hand, in step S1, if the 1st or the 2nd state sensor 66,67 all detects the OFF state, then begin the driving (step S2) of sewing machine electromotor 5.Thus, suture needle N runs through the pin hole 8a of needle plate 8, the T that reaches the standard grade through becoming closure state line capture unit 33 inside and through between the 1st clamping part 24 and the 2nd clamping part 25.And thereunder, the wire loop TL that reaches the standard grade of suture needle N side is caught by the tip 15 of container mechanism 9.And the wire loop TL that reaches the standard grade is by the rotation of middle still 16 and reach the standard grade guided plate 18 and be expanded, but this moment, because the leading section of the 2nd clamping part 25 is positioned at sufficient rear, so can not hinder the expansion of the wire loop TL that reaches the standard grade that is undertaken by the guided plate 18 of reaching the standard grade.Therefore, the T that can prevent from reaching the standard grade contacts with the rubbing surface 22 that is positioned at the rear.
And, utilize the encoder 13 of sewing machine electromotor 5, can be from the detection angles of code device signal, whether the suture needle N that judges the 1st stitch place pulls away from cloth C, whether Libra 7 arrives top dead-centre (step S3), before reaching predefined angle, repeatedly carries out the processing of step S3.If the output of this encoder 13 represents Libra 7 and arrives top dead-centre that then the clamp of 11 pairs of mobile units 28 of control module carries out action control with motor 58, with the driving (step S4) that begins grip unit 26 is moved to clip position.That is, with reference to the storage of the anglec of rotation tolerance corresponding with amount of movement from predefined initial position to clip position, carry out accordingly clamp with the driving of motor 58 with it.
Thus, grip unit 26 begins to carry out moving to clip position from initial position.Thus, because the regulating connecting rod body 60 of linkage unit 29 utilizes the pretightning force of extension spring 44 to begin to swing in the mode along X-direction, so the 1st clamping part 24 is rearward mobile, the 2nd clamping part 25 is forwards mobile.
After arriving top dead-centres, aforementioned Libra 7 is by the reach the standard grade reason of thread end TA of T of the 1st clamping part 24 and 25 clampings of the 2nd clamping part, because the lifting at 7 couples of T that reach the standard grade of top dead center Libra of Libra 7 is finished, so be positioned at pin hole 8a slightly the T that reaches the standard grade of below be in short status, if utilize the 1st clamping part 24 and 25 clampings of the 2nd clamping part T that reaches the standard grade this moment, then can make from the part that is held to the T that reaches the standard grade of end length namely " line end length " the shortest.
Then, measure corresponding clamp with the driving of motor 58 with the predefined anglec of rotation and stop if carrying out, then grip unit 26 arrives clip position, the 1st clamping part 24 is rearward mobile simultaneously, the 2nd clamping part 25 is forwards mobile, when they are close to each other, the clamping face 25a butt (state of Figure 12 and Figure 13) of the 1st clamping part 24 and the 2nd clamping part 25.Thus, the thread end TA that is inserted in the T that reaches the standard grade between them is held.In addition, in fact, arrive in the way of clip position in grip unit 26, the clamping face 25a of the 1st clamping part 24 and the 2nd clamping part 25 will butt.
Then, if carry out measuring corresponding clamp with the driving of motor 58 with the predefined anglec of rotation and stopping, then control module 11 is confirmed each state sensor 66 of detecting unit 56,67 output (step S5).
At aforementioned clip position, the 1st state sensor 66 is that ON state, the 2nd state sensor 67 are the OFF state under the normal condition, but detecting in the situation of state in addition for some sensors 66,67, carry out mistake and process (demonstration, warning etc.) (step Sa1), stop the action (step Sa2) of the each several part of Sewing machines 1, end process.
In addition, in step S5, in the situation of each sensor 66, the correct state of 67 expressions, be held the state of parts 20 clampings and make to make and proceed with the T that reaches the standard grade.That is, Sewing machines 1 carries out later the making of the 2nd stitch (step S6).In addition, to the movement of clip position, finish during above the needle point of suture needle N is positioned at needle plate 8.
Then, control module 11 judges whether to have carried out the pin that falls (for example, fall for twice pin) (step S7) of predefined pin number.For example can count by the signal output number of times to 180 ° of the expressions that obtained by encoder 13, and the fall number of times of pin of identification.
If aforementioned control module 11 is judged the pin that falls (step S7: no) do not carry out stipulated number, then until carry out the repeatedly processing of step S7 till the pin that falls of stipulated number.
On the other hand, if control module 11 is judged the pin that falls (step S7: be) that has carried out stipulated number, then carry out step S8.
The clamp of 11 pairs of mobile units 28 of aforementioned control module carries out action control with motor 58, with the driving (step S8) that begins grip unit 26 is moved to ejected position.That is, reference and predefined clip position correspondingly carry out the driving that clamp is used motor 58 to the storage of anglec of rotation tolerance corresponding to the amount of movement of ejected position.
Thus, grip unit 26 begins to carry out the movement from clamping beginning position to ejected position.And, in the process of grip unit 26 near ejected position, the sliding contacting part 60a of the regulating connecting rod body 60 of linkage unit 29 and 73 sliding-contacts of the 2nd butt parts.And if the mobile of grip unit 26 continues, then regulating connecting rod body 60 is resisted the pretightning force of extension springs 44 and is swung, and the 2nd clamping part 25 is compared greatly rearward mobile with the 1st clamping part 24.Therefore, the clamp position of the thread end TA of the T that reaches the standard grade is disengaged, and the thread end TA of the T that reaches the standard grade is decontroled from grip unit 26, and grip unit 26 arrives ejected position (state of Figure 14 and Figure 15) simultaneously.
If aforementioned grip unit 26 arrives ejected position, then control module 11 is confirmed each state sensor 66 of detecting unit 56,67 output (step S9).In ejected position, normal condition is that the 1st state sensor 66 is the ON state, the 2nd state sensing 67 is the ON state, but detecting in the situation of state in addition for any one sensor 66,67, control module 11 judges that grip unit 26 does not arrive ejected position, the repeatedly processing of step S8 before two sensors 66,67 becomes the ON state.
Then, control module 11 is made the judgement (step S10) that whether finishes.If judging to make, control module 11 do not finish (step S10: no), then until sewing finishing, the repeatedly processing of step S10.
On the other hand, finish (step S10: be) if control module 11 is judged to make, then carry out step S11.
If sewing finishing, then control module 11 utilizes the driving force of Wire-cutting electric machine 82 to Wire-cutting electric machine 82 output drive signals of tangent mechanism, carries out tangent line (step S11) be used to the line of making (reach the standard grade T and roll off the production line) by tangent mechanism.
And the clamp of 11 pairs of mobile units 28 of control module utilizes the clamp driving force of motor 58 with motor 58 output drive signals, and grip unit 26 is returned initial position (step S12) from ejected position.
And by via these processing (comprising the processing of step Sa1, step Sa2) from the processing of step S1 to step S12, the one-period made from Sewing machines 1 of thread holding device 10 finishes.
In addition, constitute under the clip position place reaches the standard grade the situation of relieving of T in grip unit 26, omit abovementioned steps S7～S9.
Above-mentioned explanation is the elemental motion of the grip unit 26 in each shift position in T " line end length " the short situation of reaching the standard grade, and the quality of sewing of making beginning for raising works.
But, in " line end length " situation more than or equal to certain regular length of the T that reaches the standard grade of aforementioned grip unit 26 clampings, if the thread end TA of grip unit 26 clampings is positioned on the lifting path of the later wire loop TL that reaches the standard grade of the 2nd stitch, for example be in middle still 16 tip 15 through on the path, the wire loop TL that then reached the standard grade pulls (Figure 19), can be sewed up among the stitching S at the cloth back side and form and pass the wire loop W (Figure 20) of line capture unit 33, but this wire loop W can make opening-closing plate 35 rotate so that line capture unit 33 becomes open mode centered by stepped screw 37, thereby the wire loop W of the T that reaches the standard grade is broken away from from line capture unit 33.
Here, so-called " line end length " more than or equal to certain fixed value is as previously mentioned, compares longer situation with retaining part to the distance of the needle falling point DP of cloth C from the T that reaches the standard grade.
In further detail explanation, in the thread holding device 10 of present embodiment, carrying out wire clamp at the clip position place by opening-closing plate 35 (the 1st clamping part 24) and the 2nd clamping part 25 (clamping face 25a) holds, keep this clip position and carry out making of several pins, the thread end TA of clamping is pulled by the lifting of the later wire loop TL that reaches the standard grade of the 2nd stitch, is sewed up among the stitching S at the cloth back side and forms and pass the wire loop W of line capture unit 33.If this wire loop W is stronger to sewing up of the stitching S at the cloth back side, even then grip unit 26 moves to ejected position and decontrols the T that reaches the standard grade of clamping between the 1st clamping part 24 and the 2nd clamping part 25, wire loop W can not break away from from line capture unit 33 yet, occlusive part 35a from the opening-closing plate 35 that consists of the 1st clamping part 24 breaks away from detail, and cloth C and line capture unit 33 become the state (Figure 21) that is linked by wire loop W
If under this state, make, then because cloth C moves to direction of feed, follow the feeding of cloth C and gradually increase so pulled the power (tension force) of the 1st clamping part 24 of grip unit 26 by the wire loop W that links, if with the 1st clamping part 24, be that the occlusive part 35a of opening-closing plate 35 is to the power of Y direction front side pulling, surpass the power that the occlusive part 35a of opening-closing plate 35 is remained line capture unit 33 to Y direction rear side pretension closure state by distortion helical spring 38, then opening-closing plate 35 makes line capture unit 33 rotate take stepped screw 37 as pivot, become open mode, separate from the openend of the notch part 34 of occlusive part 35a, line capture unit 33 becomes open mode (Figure 22, Figure 23).In addition, in Figure 19 to Figure 22, only to wanting standard laid down by the ministries or commissions of the Central Government note label.
The rotation of this opening-closing plate 35 becomes large along with the feeding of cloth C, the part that contacts with the occlusive part 35a of wire loop W thus, make occlusive part 35a along its length direction towards front, move while contacting, if through the fillet part 41 of occlusive part 35a front end, then wire loop W breaks away from (Figure 24, Figure 25) from line capture unit 33 and grip unit 26.And, if wire loop W breaks away from from line capture unit 33, then utilizing the pretightning force of distortion helical spring 38, opening-closing plate 35 returns, so that line capture unit 33 becomes closure state.In addition, in Figure 19 to Figure 25, only to wanting the standard laid down by the ministries or commissions of the Central Government to remember label.
Here, inferior in the situation that the T that reaches the standard grade that is used for making is thicker, the power that pulls grip unit 26 becomes under the large sewing condition, replacing hangs with the spring carrier arm body 40 of the other end of distortion helical spring 38, set the elastic force of distortion helical spring 38 higher (in order to prevent tangent line or cloth offset, in the softer situation of reach the standard grade T or cloth, can not improve the setting of the elastic force of distortion helical spring 38).
Because the front end at aforementioned occlusive part 35a forms fillet part 41, so can prevent that surpassing the front end mistiming at wire loop W cuts off.
Like this, thread holding device 10 according to present embodiment, because movably form, so that after T is reached the standard grade in 24 clampings of the 1st clamping part, can make line capture unit 33 become open mode by the T that reaches the standard grade, therefore even the front of the thread end TA of the T that reaches the standard grade of clamping is sewed up among the stitching S at the cloth back side and is formed in the situation of the wire loop W that passes line capture unit 33 between the 1st clamping part 24 and the 2nd clamping part 25, also can make the wire loop W that produces by with the feeding of the carrying out of making cloth C together, utilization makes line capture unit 33 become easily and reliably open mode the power that the 1st clamping part 24 pulls to the Y direction front side.And, become open mode by making line capture unit 33, can make easily and reliably wire loop W disengaging and then the T that reaches the standard grade is broken away from from the line capture unit.
Therefore, thread holding device 10 according to present embodiment, line capture unit 33 can be at initial position, under the closure state of opening-closing plate 35 with the opening closure of notch part 34, through the through wires hole Na of the suture needle N of the pin hole 8a that running through needle plate 8, the reach the standard grade thread end TA of T of seizure, grip unit 26 can be at clip position, the clamping thread end TA of T that reaches the standard grade between the 1st clamping part 24 and the 2nd clamping part 25, can in ejected position, remove the thread end TA of the T that reaches the standard grade of clamping between the 1st clamping part 24 and the 2nd clamping part 25 simultaneously.
In addition, thread holding device 10 according to present embodiment, because movably form, so that 24 clampings of the 1st clamping part are reached the standard grade after the T, can be made as the make a breach opening of section 34 of the opening-closing plate 35 of open-close body by the T that reaches the standard grade, thereby make line capture unit 33 become open mode, even the therefore front of the thread end TA of the T that reaches the standard grade of clamping between the 1st clamping part 24 and the 2nd clamping part 25, sewed up among the stitching S and formed in the situation of the wire loop W that passes line capture unit 33, also can make the wire loop W that produces by with the feeding of the carrying out of making cloth C together, utilize the power that pulls the 1st clamping part, make as the make a breach action of opening of section 34 of the opening-closing plate 35 of open-close body, thereby make line capture unit 33 become open mode, therefore can wire loop W be broken away from from line capture unit 33, and then the T that reaches the standard grade is broken away from.Its result can be easily and prevent reliably the generations such as the action of cloth offset, tangent line, device is bad, can guarantee reliably higher quality of sewing simultaneously.
And, thread holding device 10 according to present embodiment, because the opening-closing plate 35 as open-close body forms, always utilize the pretightning force of distortion helical spring 38 that line capture unit 33 is kept closed, therefore can easily make line capture unit 33 become closure state, in the situation of the power that the 1st clamping part 24 is applied the pretightning force of resisting distortion helical spring 38, make line capture unit 33 become open mode.
And, according to the thread holding device 10 of present embodiment, because be provided with for the pretightning force regulon 42 of regulating the pretightning force of twisting helical spring 38, so can easily regulate the pretightning force of distortion helical spring 38.
In addition, thread holding device 10 according to present embodiment, even under the sewing condition as " intubating length " changes, also can use thread holding device 10, therefore play and to keep the raising that realizes quality of sewing, the so attached effect of high speed (production efficiency) of making beginning.
And, thread holding device 10 according to present embodiment, because do not need correspondingly to adjust " intubating length " with thread holding device 10, thus the adjustment of " intubating length " when not needing to carry out the sewing condition change, thus also play so attached effect of enhancing productivity.
And, thread holding device 10 according to present embodiment, because how " no matter intubating length " all can use, change so can not carry out adjustment or the suture path components (standard component) of line taking spring that " intubating length " exerted an influence, therefore also play so attached effect of enhancing productivity.
And, thread holding device 10 according to present embodiment, because opening-closing plate 35 is only movable when wire loop W pulls the 1st clamping part 24 above the pretightning force of distortion helical spring 38, make line capture unit 33 become open mode and extract wire loop W, so line capture unit 33 is kept closure state usually, therefore according to the feeding of the carrying out of making cloth C together, the thread end TA of the T that reaches the standard grade is little by little pulled away from line capture unit 33, also play to prevent the effect of twining as the such suture of Bird's Nest.
And, thread holding device 10 according to present embodiment, driver element 27 can utilize a clamp with the driving force of motor 58, drives easily and reliably, so that grip unit 26 is positioned at initial position, clip position, these three positions of ejected position selectively.
Figure 26 to Figure 31 is the figure of other embodiment of the thread holding device of the Sewing machines that the present invention relates to of expression.
The thread holding device 10A of present embodiment arranges and forces motor unit 91, and it mechanically moves the 1st clamping part 24, so that line capture unit 33 becomes open mode when the 1st clamping part 24 and the 2nd clamping part 25 are positioned at ejected position.
That is,,, in the thread holding device 10A of present embodiment, have as the opening-closing plate driver part 92 of forcing motor unit 91 to shown in Figure 28 such as Figure 26.This opening-closing plate driver part 92, from the central portion of the front end face of the Y direction front side that is positioned at guided plate 63A near the right side, form before the Y direction side-prominent bar-shaped.In addition, the front end of opening-closing plate driver part 92 is configured in the following position among the side of the Y direction rear side that is positioned at opening-closing plate 35, that is, the position relative with the position between pivot and the 1st clamping part 24, the 1st clamping part 24 is relative with the 2nd clamping part 25.Certainly, opening-closing plate driver part 92 is configured in and stepped screw 37 hands-off positions.
In addition, opening-closing plate driver part 92 is not limited only to be configured on the guided plate 60A, also can be configured on pedestal part 2 other fixed positions such as grade.
In addition, when the 1st clamping part 24 and the 2nd clamping part 25 are positioned at ejected position, opening-closing plate driver part 92 makes 24 rotations of the 1st clamping part so that line capture unit 33 becomes the anglec of rotation (open angle) of open mode, preferably is made as the angle that wire loop W is easily extracted from the 1st clamping part 24.
Therefore, as opening-closing plate driver part 92, also can consist of the structure that to regulate the front position of Y direction front side along Y direction.The base end part that for example can enumerate at opening-closing plate driver part 92 forms the threaded portion, makes the structure that is screwed into quantitative change when this threaded portion is screwed into the screwed hole that is arranged on guided plate 60A or other fixed position.By such structure, can relax the parts precision and realize reducing cost, can adjust subtly rotation timing and the open angle of opening-closing plate 35, can carry out meticulous setting to thickness or the intensity of the T that reaches the standard grade, thereby can prevent tangent line, can further realize the raising of quality of sewing.
In addition, because the 1st clamping part 24 movably forms as previously mentioned, so that after T is reached the standard grade in clamping, can make line capture unit 33 become open mode by the T that reaches the standard grade, therefore in the situation that wire loop W is tangled by the 1st clamping part 24 (the occlusive part 35a of opening-closing plate 35), by carrying out the feeding with the carrying out of making cloth C together, further increase gradually the anglec of rotation (open angle become large) of opening-closing plate 35 by wire loop W, wire loop W is broken away from from the 1st clamping part 24.
In addition, also can move to the Y direction rear side of ejected position by making the 1st clamping part 24 and the 2nd clamping part 25, the anglec of rotation (open angle) of the 1st clamping part 24 is regulated.
Identical with the thread holding device 10 of aforementioned embodiments for other structure, omit its detailed explanation at this.
According to the thread holding device 10A of the present embodiment that is consisted of by said structure, as shown in figure 29, move to the process of ejected position the front end butt of the side of opening-closing plate 35 and opening-closing plate driver part 92 from clip position in grip unit 26.And, if grip unit 26 arrives ejected position, then as shown in figure 30, opening-closing plate 35 rotates take stepped screw 37 as pivot to predefined angle, so that line capture unit 33 becomes open mode, occlusive part 35a from the openend of the front that is positioned at notch part 34 away from.
Therefore, according to the thread holding device 10A of present embodiment, when the 1st clamping part 24 and the 2nd clamping part 25 are positioned at ejected position, utilize and force motor unit 91, the 1st clamping part 24 is mechanically moved, so that line capture unit 33 becomes open mode.Its result, even the front of the thread end TA of the T that reaches the standard grade of clamping is sewed up among the stitching S at the cloth back side between the 1st clamping part 24 and the 2nd clamping part 25, and form in the situation of the wire loop W that passes line capture unit 3, also can by with the feeding of the carrying out of making cloth C together, wire loop W moves to the front of the occlusive part 35a of the opening-closing plate 35 of the line capture unit 33 that becomes open mode, the fillet part 41 of the front end of process occlusive part 35a, break away from from line capture unit 33 as shown in figure 31, and then break away from from grip unit 26.
Namely, thread holding device 10A according to present embodiment, because utilize when forcing motor unit 91 to make grip unit 26 be positioned at the ejected position of predefined regulation timing, can make line capture unit 33 become open mode from closure state forcibly, do not apply tension force ground so can or make thing to the lower line of intensity, from grip unit 26 wire loop W is broken away from.
Therefore, thread holding device 10A according to present embodiment, can play the effect identical with the thread holding device 10 of aforementioned embodiments, even simultaneously sewed up among the stitching S at the cloth back side and formed in the situation of the wire loop W that passes line capture unit 33 in the front of the thread end TA of the T that reaches the standard grade of clamping, also needn't apply tension force to each T that reaches the standard grade, stitching S, cloth C, can wire loop W be broken away from from line capture unit 33.
Therefore, according to the thread holding device 10A of present embodiment, the generations such as the action of cloth offset, tangent line, device is bad can be prevented easier and more reliably, higher quality of sewing can be guaranteed reliably simultaneously.
In addition, utilize opening-closing plate of the present invention to make the structure of the thread holding device of line capture unit Sewing machines to be opened/closed, can be used for the thread holding device of existing following Sewing machines, it has upper line clamping unit, and line clamping unit has frame shape line maintaining part on this.
In addition, the present invention is not limited only to aforementioned each embodiment, also can carry out as required various changes.

Claims (7)

1. the thread holding device of a Sewing machines, it has grip unit, and this grip unit has: the 1st hold assembly, it forms notch part, inserts reaching the standard grade of linking to each other with suture needle in this notch part; And the 2nd hold assembly, its be configured to can with respect to aforementioned the 1st hold assembly contact or away from, clamping is aforementioned between itself and aforementioned the 1st hold assembly reaches the standard grade,
When making beginning, the aforementioned thread end of reaching the standard grade of this thread holding device clamping below needle plate after the pin that falls of regulation pin number, is decontroled aforementioned thread end,
It is characterized in that,
Aforementioned the 1st hold assembly has: the 1st clamping part, and it is configured to, and the peristome that is formed by aforementioned notch part is opened and closed; And preload unit, it carries out pretension to the 1st clamping part, so that aforementioned peristome is closed,
Aforementioned the 2nd hold assembly has the 2nd clamping part, and it is configured to can be with respect to the contact of aforementioned the 1st clamping part or away from, the aforementioned thread end of clamping between aforementioned the 2nd clamping part and aforementioned the 1st clamping part.
2. the thread holding device of Sewing machines according to claim 1 is characterized in that, the 1st hold assembly also has installation portion,
Aforementioned the 1st clamping part is with respect to aforementioned installation portion, and is rotatably supported.
3. the thread holding device of Sewing machines according to claim 1 and 2 is characterized in that,
Under the state of aforementioned the 1st clamping part with the peristome closure of aforementioned notch part, aforementioned notch part and aforementioned the 1st clamping part form the frame that the suture needle of the pin hole that has run through aforementioned needle plate can be passed through.
4. the thread holding device of Sewing machines according to claim 1 and 2 is characterized in that,
Has driver element, it makes aforementioned grip unit move to following position: initial position, in this position, aforementioned opening moves up and down on the path in aforementioned suture needle, and aforementioned the 1st clamping part and aforementioned the 2nd clamping part to move up and down the path relative in both sides across aforementioned; And clip position, in this position, aforementioned the 1st clamping part and aforementioned the 2nd clamping part leave to the aforementioned side that moves up and down the path, and between aforementioned the 1st clamping part and aforementioned the 2nd clamping part the aforementioned thread end of clamping.
5. the thread holding device of Sewing machines according to claim 4 is characterized in that,
Aforementioned driver element also makes aforementioned grip unit move to ejected position, in this position, aforementioned the 1st clamping part and aforementioned the 2nd clamping part further leave to the aforementioned side that moves up and down the path from aforementioned clip position, and aforementioned the 1st clamping part and aforementioned the 2nd clamping part are decontroled aforementioned thread end.
6. the thread holding device of Sewing machines according to claim 1 and 2 is characterized in that,
The pretightning force regulon is set, and it is for the pretightning force of regulating aforementioned preload unit.
7. the thread holding device of Sewing machines according to claim 1 is characterized in that,
Aforementioned preload unit has and is allowing that when aforementioned the 1st clamping part applies aforementioned tension force of reaching the standard grade aforementioned the 1st clamping part opens the pretightning force of aforementioned peristome.
CN2008101770253A 2007-11-12 2008-11-12 Upper thread retaining apparatus of sewing machine Active CN101435140B (en)

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Application Number Priority Date Filing Date Title
JP2007-293237 2007-11-12
JP2007293237 2007-11-12
JP2007293237A JP5026231B2 (en) 2007-11-12 2007-11-12 Upper thread clamp device for sewing machine

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CN101435140A CN101435140A (en) 2009-05-20
CN101435140B true CN101435140B (en) 2013-03-27

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CN2008101770253A Active CN101435140B (en) 2007-11-12 2008-11-12 Upper thread retaining apparatus of sewing machine

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JP7043016B2 (en) * 2019-04-23 2022-03-29 ヤマトミシン製造株式会社 Clothing seam expansion device

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DE102008058197B4 (en) 2019-05-09
DE102008058197A1 (en) 2009-06-04
JP2009118906A (en) 2009-06-04
CN101435140A (en) 2009-05-20

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