CN100343434C - Upper thread device for sewing machine - Google Patents
Upper thread device for sewing machine Download PDFInfo
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- CN100343434C CN100343434C CNB021249156A CN02124915A CN100343434C CN 100343434 C CN100343434 C CN 100343434C CN B021249156 A CNB021249156 A CN B021249156A CN 02124915 A CN02124915 A CN 02124915A CN 100343434 C CN100343434 C CN 100343434C
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- tension lever
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Abstract
The invention provides a thread-reeling device of a sewing machine capable of coping with the desired texture of seams, sewing conditions, etc., expediently. In the thread-reeling device 40 of a sewing machine 30 provided with a movable thread guide 42, an oscillating needle thread take up 43 provided on the side of an arm part 30c, having the first thread-reeling hole 44b and the second thread-reeling hole 44c allowing a thread to be inserted through and synchronizing with the vertical motion of a needlebar 34 to reciprocally oscillate about one end side so as to control the amount of the thread reeled out, and a needle-bar needle thread take up 46 fixed to the upper end part of the needle bar 34 and having the thread-reeling hole 46a allowing the thread to be inserted through to control the amount of the thread reeled out, a path R1 reaching a needle 3 from the movable thread guide 42 through the first thread-reeling hole 44b of the oscillating needle thread take up 43 and the needlebar needle thread take up 46 and a path R2 that is shorter than the path R1 and reaches the needle 3 from the movable thread guide 42 through the second thread-reeling hole 44c of the oscillating needle thread take up 43 can be selected.
Description
Technical field
The present invention relates to a kind of upper thread device of Sewing machines.
Background technology
In the past, on Sewing machines, be provided with the upper thread device of drawing upper thread in order to provide upper thread from the upper thread supply source to eedle.Go out to be shown with to be located at the upper thread device in the past 10,20 on the FANCY STITCH Sewing machines 1,2 in Figure 10, Figure 11, the both parties concerned common means has been used same symbol.
In Figure 10, Figure 11, the 3rd, eedle, the 4th, last fancy yarns spreader, the 5th, pass the line transfer button that the upper thread of 3 eedles 3 is used, the 6th, the line transfer button that last fancy yarns is used, the 7th, the line transfer button of line shuttle (bottom line) usefulness.The 8th, spool provides upper thread T from this spool 8.In addition, in Sewing machines 1,2, use 3 upper threads, but only represented 1 here, and omitted last fancy yarns and line shuttle thread.Sewing machines the 1, the 2nd on the upper thread that passes 3 eedles 3, winds the line and forms FANCY STITCH while make the last fancy yarns that passes fancy yarns spreader 4 and pass the line shuttle thread that is located at the not shown line shuttle in the 1a of board portion, the 2a.
In Figure 12, represent the mobile situation of change of upper thread device 10 when making, in Figure 13, represented the mobile situation of change of upper thread device 20 when making.
Shown in Figure 12 (a), the length in described line guide portion 22 when shank 9a is in bottom dead centre and the upper thread path between the shank thread take-up tension lever 15 is made as C1, the upper thread length between through wires hole 13b and the shank thread take-up tension lever 15 is made as D1.
When shank 9a when top dead-centre moves, thread take-up tension lever also rises together.If it is motionless at this moment to suppose to shake thread take-up tension lever 13, so clearly length C
1Be extended for C
1', length D
1Be extended for D
1', that is, shank thread take-up tension lever 15 is because the direction that plays a part from eedle 3 one side direction stretch that rises is drawn (taking-up) upper thread T.
On the other hand, for shaking thread take-up tension lever 13, but when being in bottom dead centre the path between through wires hole 13b and the shank thread take-up tension lever 15 be made as A1, being made as B1 to the length the through wires hole 13b from moving-wire guide portion 12.As shank 9a during, shown in Figure 12 (b), shake thread take-up tension lever 13 and also rise together near top dead-centre.At this moment suppose that shank thread take-up tension lever 15 is motionless, then length A 1 shortens to A1 ', and length B1 shortens to B1 ', that is, shake thread take-up tension lever 13 and play a upper thread T provides supply effect from the direction of (conveying) to eedle 3 one sides.
That is, in upper thread device 10, supply plays opposite effect for line to shake thread take-up tension lever 13 and shank thread take-up tension lever 15.
On the other hand, in Figure 13, but the length between the 1st through wires hole 21a and the moving-wire guide portion 12 is made as B2 when shaking thread take-up tension lever 21 and be in bottom dead centre, and the length between line guide portion 22 and the 2nd through wires hole 21b is made as A2.When shank 9b (Figure 11) when top dead-centre moves, as shown in figure 13, shake thread take-up tension lever 21 and also together rise.At this moment, length B2 shortens to B2 ', and length A 2 is extended for A2 ', and the 1st through wires hole 21a that shakes thread take-up tension lever 21 can replace described thread take-up tension lever 13, the 2 through wires hole 21b that shake can replace shank thread take-up tension lever 15, that is, 1 parts has 2 kinds of effects.
2 upper thread devices 10,20 are different in the following areas as described above.
On the one hand, in upper thread device 10, owing to will pass through shank thread take-up tension lever 15, it is big therefore to turn, and thread path is also long.Thread path is in case lengthening, and then the line total amount of extending also becomes greatly, when overlapping bed of cloth thickness difference appears, when cloth thickness is thickeied suddenly, consumption moment of upper thread T becomes many, at this moment owing to be to absorb its variation with extending, so the phenomenon that can not break.But because the line elongation is big, therefore actual pulling force does not become the value of being set by line transfer button 5, and spool 8 one sides are not given outlet, have consequently formed unflagging hard stitching.
On the other hand, upper thread device 20, because shorter than the thread path of upper thread device 10, so the line pulling force can pass to entire path at an easy rate, also supply line very swimmingly, thus can form the stitching of the softness that relaxes slightly.But because the path is shorter, therefore the line elongation that is on the whole thread path is not so much, when the variation line consumption according to fabric thickness sharply becomes big, can not utilize extension to absorb it and change, like this phenomenon that will break.
Find out thus, the weak point that upper thread device 10,20 in the past has separately, be can not effective unobstructed ground supply line device.
The objective of the invention is to provide a kind of to desirable stitching texture with make the upper thread device that situation etc. can be accomplished flexible Sewing machines.
Summary of the invention
For solving above problem, the upper thread device of the present invention's 1 described Sewing machines, for example, as shown in Figure 1, comprise: from spool 8, by line transfer button 5, side directed line guide portion (the line guide portion 41b of alignment line guiding shank 34 1, but moving-wire guide portion 42), with be arranged on head of sewing machine (chain-drive section 30c) side, with an end be the synchronous work of moving up and down of center and shank come and go shake the control line sendout (comprise the backguy of line tension and loosen this two aspect of supply line) shake thread take-up tension lever 43 and be fixed on the shank upper end, the shank thread take-up tension lever 46 of control line sendout (comprise the backguy that line is strained and supply with this two aspect of seam with loosening); It is characterized in that: for the thread path (path R1, R2) that can select different length from the line transfer button to the thread path the eedle.
The upper thread device of 1 described Sewing machines according to the present invention, for from the line transfer button to the thread path the eedle, owing to can select the thread path of different length, therefore, for example planning to form unflagging hard stitching and plan to guarantee to select long path under the situation of line extension.Perhaps form under the situation of lax slightly soft stitching, can select short path in plan.In addition, the appropriate length that can come the selection wire path according to the thickness and the various conditions such as hardness and thickness difference of linear matter, tailoring cloth, and to stitching texture with make state etc. and can accomplish to adjust to changed conditions.
Here, there is no particular limitation with the place is set for the quantity of line guide portion.In addition, being located at the quantity of shaking the through wires hole on the thread take-up tension lever, can be 1 also can be more than 2.And selectable thread path also can be more than 2.
In the upper thread device of the present invention's 1 described Sewing machines, concrete as the present invention's 2 described inventions, structure with 2 thread paths can selecting, promptly, one is by shaking thread take-up tension lever from described line guide portion, further through the shank thread take-up tension lever to the 1st thread path at eedle place and than the 1st thread path lack, from described line guide portion by shaking thread take-up tension lever, but arrive the 2nd thread path at eedle place without the shank thread take-up tension lever.
If such structure, then no matter whether by shank thread take-up tension lever modified line path simply all.
In the upper thread device of the present invention's 2 described Sewing machiness, also can be as the present invention's 3 structures described.
Promptly, the upper thread device of the present invention's 3 described Sewing machiness, it is characterized in that: be provided with near the 1st through wires hole on being located at the intermediate portion on the thread take-up tension lever and be located at the 2nd through wires hole on the front end shaking, described the 1st thread path, it is the 1st through wires hole that line is passed shake thread take-up tension lever, the 2nd thread path is the 2nd through wires hole that line is passed shake thread take-up tension lever.
The upper thread device of the present invention's 4 described Sewing machiness, in the upper thread device of the present invention's 3 described Sewing machiness, it is characterized in that: the 1st through wires hole and the 2nd through wires hole are arranged on the differing heights of above-below direction.
The upper thread device of 4 described Sewing machiness according to the present invention is to form on the different height of above-below direction owing to shake the 1st through wires hole of thread take-up tension lever with the 2nd through wires hole, so form the threading operation of being more convenient for than 2 through wires holes on same height.
The upper thread device of the present invention's 5 described Sewing machiness, be the present invention 1～4 in the upper thread device of any described Sewing machines, it is characterized in that: shake be provided with near the through wires hole of thread take-up tension lever can adjusting position, when shaking thread take-up tension lever and come and go action intermittently with the contacted line mechanism (downside is walked line mechanism 47) of walking of line.
The upper thread device of 5 described Sewing machiness according to the present invention, owing to shaking near the through wires hole of thread take-up tension lever, be provided with the cabling portion that contacts with line intermittently when thread take-up tension lever comes and goes work when shaking, the position of this cabling portion can be regulated, the position of cabling portion just can be changed and the way of contact of line so utilization is regulated, that is, the bending method of energy modified line also can be adjusted the line sendout knifeedge according to this point.
Therefore, under the through wires hole that shakes thread take-up tension lever is a plurality of situation, cabling portion can be set accordingly respectively, also can only establish one.And, also can be provided with on the shank thread take-up tension lever can adjusting position several mechanisms of cabling (upside is walked line mechanism 45).
In addition, the upper thread device of the present invention's 6 described Sewing machiness, be in the upper thread device of the present invention's 1 described Sewing machines, it is characterized in that: for example, as shown in Figure 6, shake thread take-up tension lever and have and to come and go the base portion (shaking base station 61) that shakes and can be slidably supported on this base portion and be provided with the sliding part (62) of described through wires hole, utilize the slip of this sliding part can select the thread path (path R7, R8, R9, R10) of different length along prescribed direction.
The upper thread device of 6 described Sewing machiness according to the present invention just can be selected the thread path of different length with the simple operations that the sliding part that shakes thread take-up tension lever is slided.
Here, sliding part can be directly installed in the basic courses department, also can miscellaneous part be set between.
In the upper thread device of the present invention's 6 described Sewing machiness, specifically as the present invention 7 described, sliding part can along continuous straight runs or vertical direction move.
Description of drawings
Fig. 1 is the stereogram that the double-chain chain stitch sewing machine of upper thread device of the present invention is used in expression.
Fig. 2 is the diagram that moves for the line under the R1 situation of path on the Sewing machines of explanation in Fig. 1.(a) being diagram for thread take-up tension lever, is for the diagram of shaking thread take-up tension lever (b).
Fig. 3 is the diagram that moves for the line under the R2 situation of path on the Sewing machines of explanation in Fig. 1.
Fig. 4 is the diagram for explanation shank thread take-up tension lever and upward wiring mechanism relation.
(a) and (b) are the side views that are illustrated in other examples that shake thread take-up tension lever and line guide portion that had on the upper thread device of the present invention among Fig. 5.
Fig. 6 is the side view that is illustrated in other examples that shake thread take-up tension lever that had on the upper thread device of the present invention, (a) is that expression can be that expression can be to the structure of vertical direction slip (b) to the structure of horizontal direction slip.
Fig. 7 is the side view that is illustrated in other examples that shake thread take-up tension lever that had on the upper thread device of the present invention.
Fig. 8 be for explanation be provided with among Fig. 7 shake thread take-up tension lever the time the diagram of various conditions.
But Fig. 9 is expression is arranged on the side view that shakes the example on the thread take-up tension lever among Fig. 7 to the moving-wire guide portion shown in Fig. 1.
Figure 10 is the Sewing machines stereogram of representing in the past with upper thread device.
Figure 11 is a Sewing machines stereogram of representing other examples with upper thread device in the past.
Figure 12 is the diagram that moves for the line on the Sewing machines of explanation in Figure 10.
Figure 13 is the diagram that moves for the line on the Sewing machines of explanation in Figure 11.
Among the figure: 5,6,7-line transfer button, 8-spool, 30-Sewing machines, 30a-board portion, 30c-chain-drive section (head of sewing machine), 34-shank, 40-upper thread device, 41-fueller, 41a-oil feeding reservoirs, 41b-line guide portion, but 42-moving-wire guide portion, 43-thread take-up tension lever, 44-swing arm shaken, 44b-the 1st through wires hole, 44c-the 2nd through wires hole, 45-upside is walked line mechanism, 46-shank thread take-up tension lever, 47-downside is walked line mechanism, R1-path (the 1st thread path), R2-path (the 2nd thread path), T-upper thread, 50,60,70,80-shake thread take-up tension lever, 51-line guide, 61,71-shake base station (base portion), 62,72-sliding part, R3, R5, R7, R9, R11-path (the 1st thread path), R4, R6, R8, R10, R12-path (the 2nd thread path).
The specific embodiment
Below, with reference to accompanying drawing embodiments of the invention are elaborated.
＜embodiment 1 〉
In Fig. 1, shown the double-chain chain stitch sewing machine 30 that is provided with upper thread device 40 as an example of the present invention.In Fig. 1, with the identical same symbolic representation of parts of Sewing machines 1,2 among Figure 10, Figure 11.Sewing machines 30 is by the 30a of board portion and chain-drive section (head of sewing machine) the 30c formation of extending abreast from the upright 30b of body portion that is provided with of the 30a of board portion and slave body 30b and the 30a of board portion.
And, last fancy yarns passes the line transfer button fancy yarns spreader 4 that passes again after 90s then through line transfer button 6, pass with 2 line hole 31a, 31b of threading parts 31, the 32a of threading portion, with shank 34 interlocks and come and go last fancy yarns thread take-up tension lever 33 and the 32b of threading portion that shakes successively.
But upper thread device 40 by fueller 41 moving-wire guide portion 42, shake thread take-up tension lever 43, upside and walk line mechanism 45, shank thread take-up tension lever 46, downside and walk line mechanism 47 and constitute, be by stretching and lax 3 upper thread T (only representing 1 among the figure) carry out the device of output line repeatedly in making.
The place ahead of online guide portion 41b, but moving-wire guide portion 42 be provided with.But moving-wire guide portion 42 constitutes by support 42b with the mode that connects support 42b forms the line hole with bolting and in the upper end 3 line guide rod 42a.Each line guide rod 42a can fix on the ideal position that slides up and down for support 42b, can adjust backguy and unwrapping wire amount like this.
And support 42b is fixed by the bolt 41d of the slotted hole 41f that passes described extension 41e, by making the slip of this bolt 41d along slotted hole 41f, can adjust the fore-and-aft direction position of support 42b, so also can adjust backguy and unwrapping wire amount.
In addition, in the present embodiment, but constituted line guide portion of the present invention by line guide portion 41b and moving-wire guide portion 42.
Shake thread take-up tension lever 43 as Fig. 1～shown in Figure 3, by be connected axle 43a on the described machine spindle be the center can move up and down shake base station 43b and being fixed on and shake base station 43b and go up, be that the swing arm 44 of length direction setting constitutes with front and back, and by and shank 34 output quantities of between the top dead-centre of regulation and bottom dead centre, shaking control line synchronously.On swing arm 44, be formed with the bend 44a that bends to the angle type facing to chain-drive section 30c from the front side of its central portion, and on this bend 44a, formed 3 the 1st through wires hole 44b.And, formed 3 the 2nd through wires hole 44c at the leading section of swing arm 44.Can be clear that from Fig. 2 and Fig. 3 swing arm 44 is that the center descends and forms with bend 44a, compares the 2nd through wires hole 44c with the 1st through wires hole 44b and is positioned at the top downwards.
Near the 2nd through wires hole 44c, be provided with as the downside that shakes thread take-up tension lever 43 usefulness cabling portions and walk line mechanism 47.Downside is walked line mechanism 47, by having vertical core 47b and being made of the 47c of cabling portion that is bolted to the installation portion 47a on the chain-drive section 30c and give prominence to the side from installation portion 47a, utilizes to make installation portion 47a suitably adjust the fixed position along vertical core 47a slide down kinetic energy.
In Fig. 1 for convenience the 47c of cabling portion show be in the 2nd through wires hole 44c below.But, be to be in than the 2nd through wires hole 44c more by the position at rear when actual making in mode towards the bend 44a inboard of swing arm 44, and when shaking thread take-up tension lever 43 and be positioned at bottom dead centre, on installation portion 47a, the position adjusted to and height that the 2nd through wires hole 44c is identical substantially.
Shank thread take-up tension lever 46 is fixed on the upper end of shank 34, is provided with 3 through wires hole 46a at front end.And along with moving up and down of shank 34 fluctuates between the top dead-centre of regulation and bottom dead centre and control the output quantity of upper thread T.
Below shank thread take-up tension lever 46, be provided with as the upside of shank thread take-up tension lever 46 usefulness cabling portions and walk line mechanism 45.Upside is walked line mechanism 45 formed and had vertical core side by side by the 45a of cabling portion that forms " コ " font with the 45a of cabling portion installation portion 45b formation.Upside is walked line mechanism 45 and described downside, and to walk line mechanism 47 the same, for the position that makes the 45a of cabling portion is positioned at the installation site that the height identical with the bottom dead centre of shank thread take-up tension lever 46 can be adjusted installation portion 45b up and down substantially.
In upper thread device 40 with said structure, in the time of forming not too lax hard stitching and prevent under the situation such as broken string, upper thread T be adjusted to shown in solid line among Fig. 1 path R1 (the 1st thread path) like that.
That is,, after below the lid 41c of the oil feeding reservoirs 41a that passes fueller 41, pass line guide portion 41b for the upper thread T that passes line transfer button 5.Then, after passing line guide rod 42a and passing the 1st through wires hole 44b, walk the through wires hole 46a that line mechanism 45 is other, pass shank thread take-up tension lever 46 through upside.Then, pass line guide 51 and be drawn towards eedle 3.Guarantee long thread path in the mode of passing upper thread T.
Above-mentioned situation is that upper thread T passes the situation that upside is walked the side of line mechanism 45, but also can select other break-through methods as shown in Figure 4.
That is, in Fig. 4 (a), make upper thread T walk the outer rear flank of the right 45c (rear in Fig. 1) of the 45a of cabling portion of line mechanism 45, pass the through wires hole 46a of shank thread take-up tension lever 46 again, and pass the inside (state of Fig. 1) of the 45a of cabling portion through upside.At this moment, when shank thread take-up tension lever 46 was in lower dead point position, upper thread T hung on the 45c of the 45a of cabling portion the right.
What Fig. 4 (b) represented is opposite situation, after making upper thread T pass the inside of the 45a of cabling portion, passes the through wires hole 46a of shank thread take-up tension lever 46, and the outside of the process cabling 45a of portion the right 45d (the place ahead among Fig. 1).At this moment, when shank thread take-up tension lever 46 was in lower dead point position, upper thread T hung on the 45a left side 45d of cabling portion.
What Fig. 4 (c) represented is in the front and back of the line hole 46a that passes shank thread take-up tension lever 46, to pass the right 45c of the 45a of cabling portion, the outside of left side 45d.At this moment, when shank thread take-up tension lever 46 was in lower dead point position, upper thread T hung on the both sides of the 45a of cabling portion the right 45c, left side 45d.
According to these 3 hanging wire methods separately, be different because shank thread take-up tension lever 46 moves the line output quantity (backguy, unwrapping wire amount) that is produced between top dead-centre, bottom dead centre.Concretely, even be exactly on the bottom dead centre of the situation allowance below nominal size minimum of Fig. 4 (c), also control line output slightly.Pass in the method which is selected at these 3 actually, can suitably determine according to sewing condition.
In addition, form under the situation with to a certain degree lax soft stitching, upper thread T is being adjusted to the path R2 represented as Fig. 1 dotted line (the 2nd thread path).
That is, the upper thread T for through line transfer button 5 after passing the oil feeding reservoirs 41a of fueller 41, passes line guide portion 41b.Then, after passing line guide rod 42a and the 2nd through wires hole 44c, process line guide 51 also passes eedle 3.With such feedthrough path thread path is shortened.
Below, separately backguy, unwrapping wire amount in two break-through methods of above-mentioned path R1, R2 described according to Fig. 2, Fig. 3.
At first, the situation that line is passed shank thread take-up tension lever 46 describes.Shank thread take-up tension lever 46 when the bottom dead centre line guide 51 and the length in the upper thread path between the shank thread take-up tension lever 46 be made as C2, the upper thread length between the 1st through wires hole 44b and the shank thread take-up tension lever 46 is made as D2.Shown in Fig. 2 (a), when shank 34 when top dead-centre moves, shank thread take-up tension lever 46 also rises together.At this moment, motionless if thread take-up tension lever 43 is shaken in supposition, clearly, side length C 2 becomes the C2 ' of prolongation, and length D2 becomes the D2 ' of prolongation, that is, shank thread take-up tension lever 46 plays the effect that goes out upper thread T from eedle 3 one laybacks when rising.
On the other hand, for shaking thread take-up tension lever 43, shank thread take-up tension lever 46 when the bottom dead centre and the path between the 1st through wires hole 44b are made as A3, but being made as B3 from the length between line guide rod 42a to the 1 through wires hole 44b of moving-wire guide portion 42.If supposition shank thread take-up tension lever 46 is motionless, then when shaking thread take-up tension lever 43 risings, length A 3 just becomes the A3 ' of shortening, and length B3 just becomes the B3 ' of shortening, shakes thread take-up tension lever 43 and plays a part upper thread T is provided to eedle 3 one sides.That is, shake thread take-up tension lever 43 and shank thread take-up tension lever 46 and have opposite function providing on this aspect of line.
Next, the situation of passing the 2nd through wires hole 44c for not passing shank thread take-up tension lever 46 describes according to Fig. 3.
Shake thread take-up tension lever 43 when the bottom dead centre the 2nd through wires hole 44c and the length between the line guide 51 be made as A4, but being made as B4 from the length between line guide rod 42a to the 2 through wires hole 44c of moving-wire guide portion 42.As shown in Figure 3, when shaking thread take-up tension lever 43 risings, then length B4 just shortens to length B4 ' upper thread is provided, and length A 4 just is extended for A4 ' and spurs upper thread, like this, shakes two effects that thread take-up tension lever 43 just can be brought into play backguy and confession line with parts.
According to the upper thread device 40 on the above-mentioned Sewing machines 30, when being provided with shank thread take-up tension lever 46, also be provided with the 1st through wires hole 44b and the 2nd through wires hole 44c on the thread take-up tension lever 43 shaking, so just there are two paths to select, one is the path R1 that passes shank thread take-up tension lever 46 after passing the 1st through wires hole 44b again, and another is the path R2 that does not pass shank thread take-up tension lever 46 after passing the 2nd through wires hole 44c.Therefore, for example under the situation that plan to form unflagging hard stitching, maybe will guarantee to select path R1 under the situation that line extends.Perhaps under the situation of the stitching that plan to form lax slightly softness, come hanging wire with path R2.In addition, can carry out suitable selection according to the thickness and the various conditions such as hardness, thickness difference of upper thread character, tailoring cloth, and to desired stitching texture with make situation etc. and can accomplish to adjust to changed conditions.
In addition, owing to upside is walked the hanging wire method of line mechanism 45, can from 3 kinds of methods, select as shown in Figure 4, or in installation portion 45b adjusted above-below direction position, perhaps can regulate the position that downside is walked above-below direction on the line mechanism 47, so can change the way of contact (line crooked route) with upper thread T, can carry out delicate adjustment to backguy, unwrapping wire amount like this.
And, as described above, descend downwards owing to shake the bend 44a of thread take-up tension lever 43, make the 1st through wires hole 44b be in low position than the 2nd through wires hole 44c, when operation, just can pass the 1st through wires hole 44b and the 2nd through wires hole 44c to upper thread T like a cork like this.
Upper thread device of the present invention is not only limited to the foregoing description, in a word, preferably can have many thread paths available.Below, other embodiment are described with reference to Fig. 5～Fig. 8.And, below owing to mainly be the variation that thread take-up tension lever is shaken in expression, so the primary structure of Sewing machines is identical substantially with Sewing machines shown in Figure 1 30, therefore omits and illustrate, upside is walked line mechanism, downside is walked line mechanism, line guide portion and line transfer button etc. but also have.
＜embodiment 2 〉
Shake thread take-up tension lever 50 shown in Fig. 5 (a) and (b), thread take-up tension lever 43 is identical substantially with shaking, and has bend 50a, the 1st through wires hole 50b and the 2nd through wires hole 50c.The place different with shaking thread take-up tension lever 43 be provided with on the rearward end of shaking thread take-up tension lever 50 towards above, have the line hole shake line guide portion 50d.
In Fig. 5 (a), but the moving-wire guide portion of representing among Fig. 1 42 is not set, replaces fueller 41 and be provided with fueller 52.Fueller 52 constitutes by oil feeding reservoirs 52a with the corresponding line guide portion of line guide portion 41b 52b, not the extension 41e in the fueller 41.
Upper thread T passes and shakes line guide portion 50d after passing oil feeding reservoirs 52a, line guide portion 52b.Then, same with described path R1, through the 1st through wires hole 50b, pass the path R3 that is arranged in the shank thread take-up tension lever not shown in the figures on the M1 point and path R4 same with path R2, that be drawn towards eedle through the 2nd through wires hole 50c selects one of them to carry out hanging wire arbitrarily.
Here, by line guide portion 52b with shake line guide portion 50d and constituted line guide of the present invention.
Fig. 5 (b) but expression be to be provided with the fueller 41 among Fig. 1 and the structure of moving-wire guide portion 42, can select that line is passed and be arranged in the path R5 of the shank thread take-up tension lever on the M2 point and not pass any one of path R6 of shank thread take-up tension lever.
Here, but by the line guide rod 42a of line guide portion 41b and moving-wire guide portion 42 with shake line guide portion 50d and constituted line guide of the present invention.
The structure of above Fig. 5 (a) and (b) has effect and the effect identical with the Sewing machines represented 30 among Fig. 1.
＜embodiment 3 〉
Fig. 6 is represented shakes thread take-up tension lever the 60, the 70th, is slided in the backguy hole, is and the described corresponding structure of the 1st, the 2nd through wires hole of shaking thread take-up tension lever.
Fig. 6 (a) shakes thread take-up tension lever 60, by shaking base station (base station) 61 and constituting at the sliding part 62 that front end is provided with through wires hole 63.Shaking base station 61 and shank is that the center can be shaken up and down synchronously and with axle 61a.On the side of shaking base station 61, be formed with the axial region that can make pin 65,65 axis hole 64,64 that is threadedly engaged with.On the other hand, on sliding part 62, be provided with the slotted hole 62a that forms along fore-and-aft direction, make the axial region of pin 65,65 pass this slotted hole 62a, and utilize this axial region and described axis hole 64,64 usefulness are threadedly engaged with and sliding part 62 is fixed on shake on the base station 61.
And, when selecting with the same path R7 of described path R1, be fixed at the following sliding part 62 of the solid line state of Fig. 6 (a) and shake on the base station 61, and pass through wires hole 63 backs at following upper thread T of this state and be directed to eedle one side by not shown shank thread take-up tension lever (N1 point).
In addition, when selecting, sliding part 62 is forwards moved, and fix, after following upper thread T of this state passes through wires hole 63, reboot to not shown eedle one side with the dotted line state of Fig. 6 (a) with the same path R8 of described path R2.
Shake thread take-up tension lever 70 shown in Fig. 6 (b), constitute by shaking base station 71 and being provided with the sliding part 72 of through wires hole 73 in the upper end and being connected to the connecting portion 74 that shakes on base station 71 and the sliding part 72.Shake base station 71 and shank synchronously, be that the center can be shaken up and down with axle 71a.In the side of shaking base station 71, with the fore-and-aft direction be length direction fixing connecting portion 74.Sliding part 72 can slide up and down to be installed in the leading section of this connecting portion 74.
Sliding part 72 being fixed under the locational situation of representing by solid line, upper thread is passed shank thread take-up tension lever not shown on the N2 point, and hang up line along path R9.On the other hand, under the situation of the path R10 that selects not pass the shank thread take-up tension lever, sliding part 72 after rising on the represented position of dotted line, is fixed solid line position.
Even the above-mentioned thread take-up tension lever 60,70 that shakes, the sliding part 62,72 that is provided with through wires hole 63,73 is slided forwards, backwards or up and down, so can as setting have the 1st through wires hole 44b shown in Figure 1 and the 2nd through wires hole 44c shake thread take-up tension lever 43 time, come the selection wire path, and can obtain same effect and effect.
＜embodiment 4 〉
In above-mentioned the 1st～the 3rd embodiment, shake thread take-up tension lever and be provided with two place's through wires holes, and can pass through to slide, and corresponding with 2 paths.If only establish a through wires hole but shake thread take-up tension lever, whether basis is passed the shank thread take-up tension lever and just can be selected the path so.In this case, if shown in use Figure 10 the sort of in the past shake thread take-up tension lever 13, even just guide eedle 3 sides from the line that the through wires hole that shakes thread take-up tension lever 13 passes into without the shank thread take-up tension lever, also very difficult only dependence is shaken shaking of thread take-up tension lever 13 and is obtained desirable backguy, unwrapping wire amount.At this, it is desirable to set following illustrated specified conditions by present embodiment.
The thread take-up tension lever 80 that shakes shown in Figure 7 is by shaking base station 81 and constituting in the unwrapping wire portion 82 that front end has a through wires hole 83.Shake base station 81 and shank synchronously, be that the center can be shaken up and down with axle 81a, this shakes and is fixing unwrapping wire portion 82 on the base station 81.Symbol 84 has been represented to regulate about can be up and down and be fixed on line guide rod on the assigned position when being made.
Fig. 8 has represented following relation,, the central point of a 81a is made as the X point that is, and the length (arm lengths) from the X point to through wires hole 83 is made as L2, and the length from the straight line Z-Z line that passes X point above-below direction to the shank axle center is made as L1.Relevant each condition of shaking thread take-up tension lever 80 illustrates according to following (1)～(4).
(1) when shaking thread take-up tension lever 80 and be in the bottom dead centre state, with respect to the angle θ of fore-and-aft direction straight line in-10 °～+ 30 ° scopes.Just can obtain sufficient swing range if angle θ in this scope, then shakes thread take-up tension lever 80, also can not guarantee desirable backguy amount even do not pass at upper thread under the situation of thread take-up tension lever.And the waving angle scope (move angle of top dead-centre and bottom dead centre) of shaking thread take-up tension lever 80 for example is about 20 °.
(2) arm lengths L2 has the length more than 50% of length L 1.Give an example and say, when L1=120mm, L2=100mm.If less than 50%, the amount of movement of through wires hole 83 will shorten relatively so, also just can not finish sufficient wire pulling work.
(3) position of line guide rod 84 (wearing the position of upper thread T) g for shaking the through wires hole 83 of thread take-up tension lever 80 when the bottom dead centre, is preferably on the short transverse and does not leave very much.For example under the situation of described L1=120mm, L2=100mm preferably in ± 30mm.
Like this, when bottom dead centre, shake thread take-up tension lever 80 and line guide rod 84 because difference in height is not set, in other words, when shaking thread take-up tension lever and reach top dead-centre, just can obtain and line guide rod 84 between difference in height, so upper thread will be pulled out fully.
(4) fore-and-aft direction of the position g of line guide rod 84 (left and right directions of Fig. 7, Fig. 8) position is not preferably left very much with respect to Z～Z line.Shake between thread take-up tension lever 80 and the line guide rod 84 in case too separate and to produce random line because of line lax.For example under the situation of described L1=120mm, L2=100mm, be preferably in ± the 30mm scope in, especially be positioned at 1～-30mm to be being optimal.Come the fore-and-aft direction position of regulation line guide rod 84 like this, just can prevent random line and can form good stitching.
Determine condition like that from described (1)～(4), even being passed, the upper thread T that passes through wires hole 83 is not positioned at the not shown shank thread take-up tension lever that Q is ordered, and be made as the such thread path of path R12, only rely on the action of shaking thread take-up tension lever 80 and also can guarantee sufficient backguy, unwrapping wire amount.Certainly, more under the situation in long transmission line footpath,, after passing through wires hole 83,, upper thread T is guided to eedle one side in hope again by shank thread take-up tension lever not shown on the Q point just as path 11.
(variation)
In described embodiment 4, line guide rod 84 is fixed, but but also can be as the moving-wire guide portion 42 shown in Fig. 1 is set as shown in Figure 9.But if should moving-wire guide portion 42, then as Fig. 9 (a) but utilize moving-wire guide portion 42 moved the just fore-and-aft direction position of energy modified line guide rod 42a along slotted hole 41f, easily adjust to satisfy described condition (4).
In addition, image pattern 9 (b) is such, if make line guide rod 42a change upper-lower position, then can easily adjust to satisfy described condition (3).
If embodiment 4 and variation, two kinds of thread paths that length is different can be selected, and effect and the effect identical can be obtained with embodiment 1～3, and, compare that it is simple for structure owing to shake the thread take-up tension lever that shakes of thread take-up tension lever 80 and embodiment 1～3, so can reduce cost.
In addition, the present invention is not confined to the foregoing description, can do suitable change yet.For example, the upper thread device to the double-chain chain stitch sewing machine that is provided with 3 eedles illustrates in the above-described embodiments, but also applicable on the Sewing machines of other kinds.In addition, selectable thread path also can be more than 3.
And fueller 41 can be set.
And then, can suitably change downside and walk the concrete shape that line mechanism 47 and upside are walked line mechanism 45.
According to the present invention, for path from the line transfer button to eedle, owing to the thread path that can select different length, so, for example planning to form unflagging hard stitching and plan to guarantee can to select long path under the situation of line extension.Perhaps under the situation of the soft stitching that plan formation relaxes slightly, can select short path.In addition, can select suitable path, to desirable stitching texture with make situation etc. and can adjust to changed conditions according to various conditions such as the thickness of upper thread character, tailoring cloth and thickness differences.
Claims (7)
1. the upper thread device of a Sewing machines comprises:
The line guide portion of the upper thread that guiding is sent from spool and
Be arranged on head of sewing machine the side and with an end be moving up and down of center and shank come and go synchronously shake the control line sendout shake thread take-up tension lever and
Be fixed on the shank upper end, have the through wires hole that can pass line and the shank thread take-up tension lever of control line sendout; It is characterized in that:
For from the line transfer button to the thread path the eedle that is fixed on the shank lower end, can select the thread path of different length.
2. the upper thread device of Sewing machines according to claim 1 is characterized in that:
Can select from described line guide portion, through shaking thread take-up tension lever and shank thread take-up tension lever, to the 1st thread path of eedle and than the 1st thread path short, from described line guide portion without the shank thread take-up tension lever but through shaking 2nd thread path of thread take-up tension lever to eedle.
3. the upper thread device of Sewing machines according to claim 2 is characterized in that:
Shaking thread take-up tension lever is provided with and is located near the 1st through wires hole the intermediate portion and is located at the 2nd through wires hole on the front end;
The situation of described the 1st thread path is that line is passed the 1st through wires hole that shakes thread take-up tension lever, and the situation of the 2nd thread path is that line is passed the 2nd through wires hole that shakes thread take-up tension lever.
4. the upper thread device of Sewing machines according to claim 3 is characterized in that:
The 1st through wires hole is set on the different height of above-below direction with the 2nd through wires hole.
5. according to the upper thread device of any described Sewing machines in the claim 1～4, it is characterized in that:
Shaking near the through wires hole of thread take-up tension lever, be provided with can adjusting position, when shaking the line mechanism of walking that contacts with line intermittently when thread take-up tension lever comes and goes action.
6. the upper thread device of Sewing machines according to claim 1 is characterized in that:
Shaking thread take-up tension lever has and can come and go the base portion that shakes and can be slidably supported sliding part on this base portion, that be provided with described through wires hole along prescribed direction;
Utilize the slip of sliding part to select the thread path of different length.
7. the upper thread device of Sewing machines according to claim 6 is characterized in that:
Sliding part can move along horizontal direction or vertical direction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001191409A JP2003000979A (en) | 2001-06-25 | 2001-06-25 | Thread-reeling device of sewing machine |
| JP2001191409 | 2001-06-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1393586A CN1393586A (en) | 2003-01-29 |
| CN100343434C true CN100343434C (en) | 2007-10-17 |
Family
ID=19030040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021249156A Expired - Lifetime CN100343434C (en) | 2001-06-25 | 2002-06-25 | Upper thread device for sewing machine |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2003000979A (en) |
| CN (1) | CN100343434C (en) |
| IT (1) | ITTO20020538A1 (en) |
| TW (1) | TW593827B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5953062B2 (en) * | 2012-02-16 | 2016-07-13 | ペガサスミシン製造株式会社 | Sewing machine |
| CN109957891B (en) * | 2017-12-25 | 2021-06-01 | 杰克缝纫机股份有限公司 | Flat seaming machine and flat seaming machine thread take-up mechanism thereof |
| CN108060514A (en) * | 2018-01-16 | 2018-05-22 | 杰克缝纫机股份有限公司 | A kind of sewing machine Yarn taking-up mechanism and sewing machine |
| CN108103678B (en) * | 2018-01-16 | 2020-06-05 | 杰克缝纫机股份有限公司 | Sewing machine take-up mechanism and sewing machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02177998A (en) * | 1988-12-29 | 1990-07-11 | Susumu Matsubara | Sewing automatic control zigzag sewing machine equipped with arithmetic circuit |
| JPH03146090A (en) * | 1989-10-31 | 1991-06-21 | Juki Corp | Needle thread supplying device for sewing machine |
| JPH03234289A (en) * | 1990-02-10 | 1991-10-18 | Brother Ind Ltd | Thread delivery device for sewing machine |
| CN1112620A (en) * | 1993-10-27 | 1995-11-29 | 联合特别公司 | Thread handling system |
-
2001
- 2001-06-25 JP JP2001191409A patent/JP2003000979A/en active Pending
-
2002
- 2002-06-21 IT IT2002TO000538A patent/ITTO20020538A1/en unknown
- 2002-06-25 TW TW91113926A patent/TW593827B/en not_active IP Right Cessation
- 2002-06-25 CN CNB021249156A patent/CN100343434C/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02177998A (en) * | 1988-12-29 | 1990-07-11 | Susumu Matsubara | Sewing automatic control zigzag sewing machine equipped with arithmetic circuit |
| JPH03146090A (en) * | 1989-10-31 | 1991-06-21 | Juki Corp | Needle thread supplying device for sewing machine |
| JPH03234289A (en) * | 1990-02-10 | 1991-10-18 | Brother Ind Ltd | Thread delivery device for sewing machine |
| CN1112620A (en) * | 1993-10-27 | 1995-11-29 | 联合特别公司 | Thread handling system |
Also Published As
| Publication number | Publication date |
|---|---|
| TW593827B (en) | 2004-06-21 |
| CN1393586A (en) | 2003-01-29 |
| JP2003000979A (en) | 2003-01-07 |
| ITTO20020538A1 (en) | 2003-12-22 |
| ITTO20020538A0 (en) | 2002-06-21 |
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