CN101220548A - Sewing line guide member of sewing machine - Google Patents
Sewing line guide member of sewing machine Download PDFInfo
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- CN101220548A CN101220548A CNA2008100003729A CN200810000372A CN101220548A CN 101220548 A CN101220548 A CN 101220548A CN A2008100003729 A CNA2008100003729 A CN A2008100003729A CN 200810000372 A CN200810000372 A CN 200810000372A CN 101220548 A CN101220548 A CN 101220548A
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Abstract
The invention provides a thread guide part for a sewing machine, capable of fitting the change of sewing condition and preventing breakage of thread. The thread guide part for the sewing machine comprises: a fixing part fixed on the main body of the sewing machine; a guide part which clamps the thread and guides the thread to the pin hole; an elastic part forming a elastic deformation under a tension acted on the thread passed through the guide part to change the position of the guide part.
Description
Technical field
The present invention relates to a kind of suture guiding parts with Sewing machines of Libra and needle bar.
Background technology
At present, be arranged at the suture guiding parts on the bearing etc. of the needle bar that keeps suture needle, form by rigid body, and can not change the position (for example, with reference to patent documentation 1) in the line hole that is used to suture is passed and forms.
Therefore,, set the position in the line hole of suture guiding parts exactly, the suture guiding from Libra to suture needle is successfully carried out, prevent the fluctuation of suture simultaneously for by the contacting of line hole and suture to suture working tension suitably.
Patent documentation 1: open flat 5-68481 communique in fact
Summary of the invention
But, in making, for example as shown in Figure 5, following the cloth feeding under the situation of the rapid thickening of thickness of sewn object c, since with the part of cloth thickening accordingly, forming stitching need so the consumption of suture sharply increases, increase the tension force of the suture between Libra and the suture needle than current more suture t.At this moment, because aforementioned suture guiding parts can not make the position displacement in line hole,, can there be the problem that is easy to generate poor stitching qualitys such as broken string to the very big tension force of suture t effect between Libra and the suture needle n so the frictional force of line hole and suture can sharply increase.
Therefore, the present invention proposes in order to address the above problem, and its purpose is, can tackle the thick variation that waits sewing condition of cloth in the process of making neatly, the generation of inhibition broken string etc.
According to technical scheme 1 described invention, suture guiding portion is fixed on the sewing machine main body via fixed part, but elastic portion is according to acting on tension force on the suture that passes guide portion, carries out strain along the fore-and-aft direction of sewing machine main body, and the position of guide portion is changed.
Thus, even owing to the rapid variation of sewing condition makes the tension variation that acts on the suture, also can relax this variable quantity by the strain of elastic portion.Therefore, the variation of corresponding sewing condition neatly, the generation of inhibition broken string etc.
Technical scheme 2 described inventions, it is characterized in that, aforementioned fixation portion forms in the bearing that embeds needle bar, this needle bar keeps suture needle, this bearing is arranged on the sewing machine main body, and aforementioned elastic portion is mutually continuous with aforementioned fixation portion, and forming can be along the flexible snake abdomen shape of the fore-and-aft direction of aforementioned sewing machine main body, aforementioned guide portion is mutually continuous with aforementioned elastic portion, has the suture that suture is passed and passes the hole.
According to technical scheme 2 described inventions, be fixed on the sewing machine main body in the bearing of suture guiding portion by fixed part embedding needle bar, but elastic portion is corresponding to acting on the tension force that passes on the suture that suture passes the hole, make the part of snake abdomen shape carry out strain on the fore-and-aft direction of sewing machine main body, the position that makes suture pass the hole changes.
Thus, even owing to the rapid variation of sewing condition acts on tension variation on the suture, this variable quantity of flexible mitigation of snake abdominal section that also can be by elastic portion.Therefore, can tackle the variation of sewing condition neatly, the generation of inhibition broken string etc.
According to technical scheme 3 described inventions, the suture guiding parts are fixed on the sewing machine main body by steady pin, but spring carries out strain corresponding to acting on the tension force that passes on the suture that suture passes the hole on the fore-and-aft direction of sewing machine main body, and the position that makes suture pass the hole changes.At this moment, utilize the gathering sill of guide portion and insert the guide finger of this gathering sill, the suture of guide portion passes the hole and is directed to along the fore-and-aft direction of sewing machine main body and moves.
Thus, even owing to the rapid variation of sewing condition makes the tension variation that acts on the suture, also can be by this variable quantity of flexible mitigation of spring.Therefore, can tackle the variation of sewing condition neatly, the generation of inhibition broken string etc.
The effect of invention
According to technical scheme 1 described invention, even owing to act on tension variation on the suture because of the rapid variation of sewing condition, also can relax this variable quantity, so can tackle the variation of sewing condition neatly, the generation of inhibition broken string etc. by the strain of elastic portion.
According to technical scheme 2 described inventions, even owing to act on tension variation on the suture because of the rapid variation of sewing condition, also can pass through this variable quantity of flexible mitigation of the snake abdominal section of elastic portion, so can tackle the variation of sewing condition neatly, the generation of inhibition broken string etc.
According to technical scheme 3 described inventions, even owing to act on tension variation on the suture because of the rapid variation of sewing condition, also can be by this variable quantity of flexible mitigation of spring, so can tackle the variation of sewing condition neatly, the generation of inhibition broken string etc.
Description of drawings
Fig. 1 is the side view that the front (left side) from Sewing machines is observed.
Fig. 2 is the vertical view of suture guiding portion, the state when (a) being illustrated on the suture working tension not, the state when (b) being illustrated in the tension force that effect is bigger on the suture.
Fig. 3 is the side view that the front from Sewing machines (left side) the when suture guiding portion of other modes is set is observed.
Fig. 4 is the upward view of the suture guiding portion of other modes.
Fig. 5 is the figure that the difference of the suture extraction amount when having stage portion in cloth is described.
The specific embodiment
Below, with reference to accompanying drawing the best mode that the present invention relates to is described in detail.
(structure of Sewing machines)
As shown in Figure 1, Sewing machines 100 has sewing machine main body 1, and this sewing machine main body 1 inside has that driving with sewing machine electromotor is rotated goes up axle etc.In Fig. 1, in sewing machine main body 1, be provided with the driving that utilizes sewing machine electromotor and be rotated on axle (not shown) and go up that axle links and the needle bar 2 that can move up and down with aforementioned via toggle-action lever etc.This needle bar 2 inserts in the needle bar bearing 4 that is fixed on the sewing machine main body 1, and the rotation motion that utilizes toggle-action lever will go up axle is changed to and moves up and down.Keep being formed with the known suture needle 3 of pin hole (not shown) at the front end (lower end) of needle bar 2.
Form the needle bar suture guiding portion 5 that suture passes hole (not shown), near the lower end setting of needle bar 2.Pass hole and aforementioned pin hole by making the suture T that supplies with by suture supply sources (diagrammatic sketch shows) such as bobbin winolers pass aforementioned suture successively, form the suture path.
On sewing machine main body 1, be provided with along the foot-pressing bar 6 of the axis direction configuration of needle bar 2.Foot-pressing bar 6 can insert in the foot-pressing bar bearing 7 that is fixed on the sewing machine main body 1 with moving up and down.In the lower end of this foot-pressing bar 6, can cloth pressing 8 be installed freely with dismantling, this cloth pressing 8 is pushed and is put the cloth C that is stated from the sewing machine table 101.Cloth pressing 8 is to be divided into two strands and the mode of extending forms towards suture needle 3.And, dispose each parts in the mode that is divided into the pin that falls between two strands the cloth pressing 8 at this.
Be provided with the Libra 9 that tension force that subtend suture T applies is regulated on the top of sewing machine main body 1, form the suture that suture T is passed through at the front end of Libra 9 and pass hole 9a.Libra 9 moves up and down along the groove that is formed on the sewing machine main body 1 so that suture passes the state that this suture passes hole 9a.Link by Libra 9 and last axle, moving up and down of the action of Libra 9 and needle bar 2 is synchronous.
(suture guiding parts)
As shown in Figure 1, the suture that suture guiding parts 10 are disposed at Libra 9 passes on the suture path between the pin hole of hole 9a and suture needle 3, and is fixed near the needle bar bearing 4 the 1a of portion of front end Hubei Province of sewing machine main body 1.
As shown in Figure 2, suture guiding parts 10 have: fixed part 11, and it is fixed on the needle bar bearing 4 of sewing machine main body 1; Elastic portion 12, itself and fixed part 11 form continuously, carry out strain corresponding to the tension force to the suture T effect of passing guide portion 13, and the position of guide portion 13 is changed; And guide portion 13, its card ends suture T, with the pin hole guiding of this suture T to suture needle 3.The each several part of suture guiding parts 10 utilizes rubber-like plastics or metal, forms as parts.That is, aforementioned elastic portion 12 is between fixed part 11 and guide portion 13.
As shown in Figure 2, fixed part 11 forms the cut ring-type of a part, by embedding the needle bar bearing 4 from this otch, is fixed on the needle bar bearing 4.In addition, also can replace needle bar bearing 4 and fixed part 11 is fixed on the frame of sewing machine main body 1.
Aforementioned elastic portion 12 is that fore-and-aft direction (being the left and right directions of paper for Fig. 1) stretchably of sewing machine main body 1 is bent to form along the cloth direction of feed.Specifically, elastic portion 12 forms like this: at first, from the fixed part 11 that forms ring-type continuously to the left of sewing machine main body 1 to (for the front side of Fig. 1 for paper, for Fig. 2 is the below of paper) prolong, in its way, (for Fig. 1 is the inboard of paper with the right to sewing machine main body 1, be the top of paper for Fig. 2) the mode bending of turning back, the mode bending of turning back to (for Fig. 1 is the front side of paper, for the below of Fig. 2 for paper) then with left to sewing machine main body 1.That is, as shown in Figure 2, form with S word sigmoid in the front side of needle bar bearing 4.
This elastic portion 12 has the elastic force littler than the tension force of the suture that passes aforementioned guide portion 13, corresponding to the tension force that applies to aforementioned suture, the direction of displacement in the suture path that causes to applying by this tension force, specifically, to the place ahead (the place ahead of cloth direction of feed) of sewing machine main body strain, the position that makes aforementioned guide portion 13 is to the place ahead of aforementioned sewing machine main body displacement.If the rapid extraction of suture disappears, the tension force of suture relaxes, and then elastic portion 12 is by the elastic force post-equalization of itself, and the position of guide portion 13 also returns to original position.
Near the 1a of Hubei Province portion that suture guiding parts 10 is fixed in sewing machine main body 1, the suture that the suture that the suture that the suture T that extracts out from bobbin winoler passes Libra 9 successively passes hole 9a, guide portion 13 passes hole 13a, needle bar suture guiding portion 5 passes the pin hole of hole and suture needle 3.
As shown in Figure 1, suture guiding parts 10, side-prominent forward with guide portion 13 from the 1a of Hubei Province portion of sewing machine main body 1, make suture T pass the mode that suture passes hole 13a and dispose.Usually suture T becomes a little crooked path as in the reality.Pei Zhi suture guiding parts 10 like this, by applying thread tension, elastic portion 12 is carried out strain and when extending, is become linearity owing to link the suture path of the pin hole of Libra 9 and suture needle 3, so the suture of guide portion 13 passes the position that hole 13a is positioned at double dot dash line.
(actions of suture guiding parts)
Below, the action of the suture guiding parts 10 the when tension force of subtend suture T effect changes describes.
As shown in Figure 1, not when suture applies big tension force, suture T is through path because of the crooked solid line of suture guiding parts 10 shown in Figure 1 since on suture guiding parts 10 the also very big tension force of effect, so the state that the elastic portion 12 of snake abdomen shape remains retracted.
But, the cloth thickening if in cloth, there is stage portion, then because the amount of making required suture T of cloth increases, so suture T is strained to the cloth side, effect is than current bigger tension force on suture T.If the bigger tension force of effect on suture T, then suture T trends towards along the path (path of the double dot dash line shown in Fig. 1) that links between the pin hole of Libra 9 and suture needle 3 for the linearity of beeline.
Accompany with it, make suture T pass the moving direction that guide portion 13 that suture passes hole 13a also is pulled to suture T.By the pulling of guide portion 13, the snake abdominal section of elastic portion 12 from the state (state of Fig. 2 (a)) that shrinks to the state of stretching out (state of Fig. 2 (b)) strain.By the strain of elastic portion 12, also move to the direction that is pulled by suture T with elastic portion 12 consecutive guide portion 13.At this moment and since guide portion 13 do not hinder form suture T trend towards along the path, institute is so that because the tension force of suture and the bigger tension force release that applies to guide portion 13.
(action effect)
Suture guiding parts 10 according to above-mentioned Sewing machines 100, suture guiding parts 10 embed in the needle bar bearing 4 by making fixed part 11, be fixed on the sewing machine main body 1, but the tension force that elastic portion 12 applies corresponding to the suture that passes hole 13a to the suture that passes guide portion 13, make snake abdomen shape part strain on the fore-and-aft direction of sewing machine main body 1, thus the position change that makes the suture in the guide portion 13 pass hole 13a.
Thus, even sewing condition sharply changes, for example, the tension force that exists stage portion to act on suture T owing to cloth changes, and also can pass through this variable quantity of flexible mitigation of the snake abdominal section of elastic portion 12.Therefore, the variation of corresponding sewing condition neatly, thereby the generation that can suppress to break etc.
In addition, because guide portion 13 utilizes the strain of elastic portion 12 to move, the path that can make suture T is near linearity, so even the cloth thickening also can suppress the quantity delivered of required suture T to be necessary bottom line.
In addition, owing to trying every possible means in shape, just can solve broken string and wait the problem that takes place, so can provide suture guiding parts 10 with simple structure qurer by using single elastomeric element.
Other modes of＜suture guiding parts 〉
Below, other modes of suture guide member are described.In addition and since in Sewing machines machine 100 only suture guiding parts 20 be different parts, so the inscape identical with above-mentioned embodiment marks identical label, it illustrates omission.
(suture guiding portion)
As shown in Figure 3, Figure 4, suture guiding parts 20 are fixed on the 1a of Hubei Province portion of front end of sewing machine main body 1.In addition, Fig. 4 is the figure from the 1a of Hubei Province portion of beneath sewing machine main body 1.
Suture guiding parts 20 have: as the steady pin 21 of fixed part, it will be fixed on the sewing machine main body 1 as an end of the spring 22 (aftermentioned) of elastic portion; As the spring 22 of elastic portion, it can be flexible along the fore-and-aft direction of sewing machine main body 1; As the guided plate 23 of guide portion, the other end of itself and spring 22 links, and suture is guided to pin hole.
Steady pin 21 is set to, Hubei Province of sewing machine main body 1 1a of portion from below insert the sewing machine main body 1, thereby an end position of spring 22 is fixed on the sewing machine main body 1.
Spring 22 for example forms by being wound as spiral helicine helical spring, is configured such that the fore-and-aft direction (in Fig. 3 left and right directions of paper) of its flexible direction (strain direction) along sewing machine main body 1.
As shown in Figure 4, guided plate 23 links via the other end of the connecting pin 24 that uprightly is arranged at the one end with spring 22, moves along the fore-and-aft direction of sewing machine main body 1 by stretching of spring 22.The other end bending of guided plate 23, the suture that is formed for suture is passed at its front end passes hole 23a.
On guided plate 23, be formed with the gathering sill 23b of slotted hole shape, it forms in the mode that the fore-and-aft direction along sewing machine main body 1 extends.Guide finger 25 inserts this gathering sill 23b from the below, thereby is fixed on the sewing machine main body 1.In addition, the center line along its length of the axis of the axle center of steady pin 21, spring 22, the axle center of connecting pin 24, gathering sill 23b and the axle center of guide finger 25 all are on the same straight line.And each component configuration is to make the fore-and-aft direction (for Fig. 4 left and right directions for paper) of this straight line along sewing machine main body 1.Thus, by stretching of spring 22, suture passes hole 23a and also can move on the fore-and-aft direction of sewing machine main body 1.
(action of suture guiding portion)
Below, the action of the suture guiding parts 20 the when tension force that acts on suture T is changed describes.
With the situation of suture guiding parts 10 in the same manner, during effect is not bigger on suture T tension force, suture T is through solid-line paths shown in Figure 1, spring 22 also keeps natural length.
But, the cloth thickening if in cloth, there is stage portion, then because the amount of making required suture T of cloth increases, so suture T is pulled to the cloth side, effect is than current bigger tension force on suture T.If the bigger tension force of effect on suture T, then suture T trends towards along the path (path of the double dot dash line shown in Fig. 1) that links between the pin hole of Libra 9 and suture needle 3 for the linearity of beeline.
Accompany with it, make suture T pass the moving direction that guide portion 23 that suture passes hole 23a also is pulled to suture T.By the pulling of guide portion 23, spring 22 is from the state strain of natural length to elongation.Carry out strain by spring 22, the guided plate 23 that links with spring 22 also moves to the direction that is pulled by suture T.At this moment and since guided plate 23 do not hinder form suture T trend towards along the path, institute is so that act on bigger tension force release on the guided plate 23 owing to what the tension force of suture T produced.
(action effect)
According to these suture guiding parts 20, suture guiding parts 20 utilize steady pin 21 to be fixed on the sewing machine main body 1, but spring 22 is corresponding to acting on the tension force that passes on the suture that suture passes hole 23a, strain on the fore-and-aft direction of sewing machine main body 1, the position that makes suture pass hole 23a changes.At this moment, the gathering sill 23b by guided plate 23 and insert guide finger 25 among this gathering sill 23b, the suture of guided plate 23 pass hole 23a and are directed to along the fore-and-aft direction of sewing machine main body 1 and move.
Thus, even owing to the rapid variation of sewing condition acts on tension variation on the suture, also can be by this variable quantity of flexible mitigation of spring 22.Therefore, the variation of corresponding sewing condition neatly, the generation of inhibition broken string etc.
In addition, because guide portion 23 utilizes the strain of spring 22 to move, the path that can make suture T is near linearity, so even the cloth thickening also can suppress the quantity delivered of required suture T to be necessary bottom line.
In addition, can provide suture guiding parts 20 with simple structure qurer.
Claims (3)
1. the suture guiding parts of a Sewing machines, this Sewing machines has Libra and needle bar, it is characterized in that,
These suture guiding parts are disposed on the suture path between aforementioned Libra and the aforementioned needle bar, are made of following parts:
Fixed part, it is fixed on the sewing machine main body;
Guide portion, it passes the suture from the suture supply source, and this suture is guided to pin hole; And,
Elastic portion, it is arranged between aforementioned fixation portion and the aforementioned guide portion, have the elastic force littler than the tension force of the suture that passes aforementioned guide portion, utilization can change the position of aforementioned guide portion along the strain of the suture path direction of displacement corresponding with the tension force of aforementioned suture on the aforementioned displacements direction.
2. the suture guiding parts of Sewing machines according to claim 1 is characterized in that, aforementioned fixation portion forms in the bearing that embeds needle bar, and this needle bar keeps suture needle, and this bearing is arranged on the sewing machine main body,
Aforementioned elastic portion is mutually continuous with aforementioned fixation portion, forms the snake abdomen shape that can stretch along the fore-and-aft direction of aforementioned sewing machine main body,
Aforementioned guide portion is mutually continuous with aforementioned elastic portion, has the suture that suture is passed and passes the hole.
3. the suture guiding parts of Sewing machines according to claim 1 is characterized in that,
Aforementioned elastic portion be formed by the spring that can stretch along the fore-and-aft direction of aforementioned sewing machine main body,
Aforementioned fixation portion is formed by the steady pin that the end with aforementioned spring is fixed on the aforementioned sewing machine main body,
The other end of aforementioned guide portion and aforementioned spring links, and aforementioned guide portion has: gathering sill, and it forms in the mode that the fore-and-aft direction along aforementioned sewing machine main body extends; Guide finger, it inserts in the aforementioned gathering sill, is fixed on the aforementioned sewing machine main body; And suture passes the hole, and it can make suture pass.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007003345A JP2008167913A (en) | 2007-01-11 | 2007-01-11 | Thread guide for sewing machine |
| JP2007003345 | 2007-01-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101220548A true CN101220548A (en) | 2008-07-16 |
Family
ID=39630605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100003729A Pending CN101220548A (en) | 2007-01-11 | 2008-01-08 | Sewing line guide member of sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2008167913A (en) |
| CN (1) | CN101220548A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560914A (en) * | 2010-11-16 | 2012-07-11 | Juki株式会社 | Rotating thread take-up lever device for sewing machine |
| CN103696158A (en) * | 2013-12-30 | 2014-04-02 | 吴江市菀坪铭正缝纫机零件厂 | Thread leading device of sewing machine platform |
-
2007
- 2007-01-11 JP JP2007003345A patent/JP2008167913A/en active Pending
-
2008
- 2008-01-08 CN CNA2008100003729A patent/CN101220548A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560914A (en) * | 2010-11-16 | 2012-07-11 | Juki株式会社 | Rotating thread take-up lever device for sewing machine |
| CN102560914B (en) * | 2010-11-16 | 2015-08-12 | Juki株式会社 | The rotation sky scale device of Sewing machines |
| CN103696158A (en) * | 2013-12-30 | 2014-04-02 | 吴江市菀坪铭正缝纫机零件厂 | Thread leading device of sewing machine platform |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2008167913A (en) | 2008-07-24 |
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Open date: 20080716 |