CN102560914B - The rotation sky scale device of Sewing machines - Google Patents
The rotation sky scale device of Sewing machines Download PDFInfo
- Publication number
- CN102560914B CN102560914B CN201110363620.8A CN201110363620A CN102560914B CN 102560914 B CN102560914 B CN 102560914B CN 201110363620 A CN201110363620 A CN 201110363620A CN 102560914 B CN102560914 B CN 102560914B
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- libra
- standard grade
- parts
- reaching
- sewing
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Classifications
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B49/00—Take-up devices, e.g. levers, for the needle thread
- D05B49/04—Take-up devices, e.g. levers, for the needle thread rotary
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B63/00—Devices associated with the loop-taker thread, e.g. for tensioning
- D05B63/02—Loop-taker thread take-up levers
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/30—Details
Abstract
The present invention relates to a kind of rotation sky scale device of Sewing machines, its line taking amount of reaching the standard grade only regulating Libra parts to produce in the scope of suitable main shaft angle.The rotation sky scale device of this Sewing machines has: Libra parts; First line guide member of sewing, it inserts from supply source reaching the standard grade to Libra parts of reaching the standard grade; And second line guide member of sewing, it inserts reaching the standard grade from Libra parts to suture needle, Libra parts are utilized to rotate and carry out rotating synchronous periodically reaching the standard grade with main shaft and lift and discharge, have in the rotation sky scale device of this Sewing machines: control agent, its by only on because Libra parts rotate thread path centered by the first or second line guide member of sewing, rotate to make the side of reaching the standard grade on the direction producing angle change, abut with reaching the standard grade, thus change this path of reaching the standard grade, the line taking amount of reaching the standard grade that Libra parts produce is regulated; And position regulating unit, it carries out carrying out position adjustments to control agent in the plane of rotating at upper thread path.
Description
Technical field
The present invention relates to a kind of rotation sky scale device of Sewing machines.
Background technology
In the Zigzag sewing machine that pin swing occurs, adopt the Libra carrying out the rotation Libra formula rotated centered by main shaft.
This rotation Libra (Libra parts) is arranged on the facing side of sewing machine stand, has the wrist extended along radiation direction.And, the suture (reach the standard grade) of line guide member via the wrist to the line guide member of suture needle side that rotate Libra of source is supplied from line, by with rotate Libra rotation accordingly, move back and forth between the base end part and radiation direction leading section of wrist, thus the path of reaching the standard grade and tension variation, thus, the knotting of extraction from supply source of reaching the standard grade and stitching is promoted.
But, as shown in still curve (change of the amount of drawing in of reaching the standard grade that still produces) K and Libra curve (rotating the change of the line taking amount of reaching the standard grade that Libra produces) T in fig .9, when reaching the standard grade of rotating that Libra lift that still in the interval of reaching the standard grade captures departs from from still, generation is reached the standard grade surplus A.Further, when carrying out especially under low tension making, because suture is easy to be drawn out, therefore, produce following problems, that is, this surplus A reached the standard grade amount increase, disorder of reaching the standard grade, winding of reaching the standard grade, and Sewing machines component contact and produce broken string.
Therefore, need the interval of the bottom dead centre M to top dead-centre J from rotation Libra in described Libra curve, reach the standard grade the amount of drawing in accordingly by what produce with still, the line taking amount of reaching the standard grade rotating Libra generation is suitably adjusted, thus the suture surplus realized when crossing still reduces.
Therefore, in the Zigzag sewing machine recorded in patent document 1, as shown in Figure 10, be provided with at the facing side being provided with the Sewing machines 200 rotating Libra 201: the first suture guiding portion 202, wherein insert from supply source of reaching the standard grade to the T that reaches the standard grade rotating Libra 201; And second suture guiding portion 203, wherein insert from rotation Libra 201 to the set in brickwork T that reaches the standard grade of suture needle.And, one of them person of first suture guiding portion 202 and the second suture guiding portion 203 is arranged rotationally, therefore, carry out change to the suture path formed between the suture guiding portion 202 supplying source of reaching the standard grade on suture path, the suture guiding portion 203 rotating the suture needle side on Libra 201, suture path to regulate, the line taking amount of T thus adjustment is reached the standard grade.
Patent document 1: Japanese Patent Publication 04-125873 publication
Summary of the invention
But, in the Sewing machines that patent document 1 is recorded, carry out changing the suture guiding portion 202,203 regulated for opposite joint thread path and adopt the structure of will reach the standard grade in T insertion through wires hole, as shown in figure 11, reach the standard grade and limited by through wires hole 202A all the time.Therefore, if carry out position adjustments to suture guiding portion 202, then produce following problems, namely, shown in rotation Libra curve Ta as shown in the double dot dash line of Fig. 9, due to the impact that suture route diversion regulates, in all angles that main shaft rotates a circle, the line taking amount of reaching the standard grade that rotation Libra carries out changes.
Such as, Libra top dead-centre J is that the timing of thrusting cloth with suture needle sets its phase place accordingly with falling a R, but in the Sewing machines of patent document 1, if undertaken changing adjustment by opposite joint thread path and adjust the line taking amount of reaching the standard grade, the phase place then likely making Libra top dead-centre J or fall a R also changes, and is formed have an impact and quality of sewing is reduced stitching.
The object of the present invention is to provide a kind of rotation sky scale device of Sewing machines, it in a part of scope of main shaft angle, can regulate the line taking amount of reaching the standard grade when rotating Libra lift.
The invention that technical scheme 1 is recorded is a kind of rotation sky scale device of Sewing machines, and it has: Libra parts, and the rotation of itself and machine spindle synchronously rotates, and has in leading section the hook portion that reaches the standard grade, first line guide member of sewing, wherein inserts from supply source reaching the standard grade to described Libra parts of reaching the standard grade, and second line guide member of sewing, wherein insert from described Libra parts reaching the standard grade to suture needle, rotated by described Libra parts, thus rotate with described main shaft and synchronously periodically lift reaching the standard grade and discharge, the feature of the rotation sky scale device of this Sewing machines is, have: control agent, it only produces the side the direction of angle change from upper thread path rotates centered by the described first or second line guide member of sewing because described Libra parts rotate, abut with described reaching the standard grade, change the path that this is reached the standard grade thus, the line taking amount of reaching the standard grade that described Libra parts produce is regulated, and position regulating unit, its thread path on described carries out, in the plane of rotating, carrying out position adjustments to described control agent.
The feature of the invention that technical scheme 2 is recorded is to have the structure identical with the invention that technical scheme 1 is recorded, and described control agent is configured to abut to described reaching the standard grade of Libra parts with from described first line guide member of sewing.
The feature of the invention that technical scheme 3 is recorded is to have the structure identical with the invention that technical scheme 1 is recorded, and described control agent is configured to have and can abuts to described reaching the standard grade of second line guide member of sewing with from described Libra parts.
The feature of the invention that technical scheme 4 is recorded is, there is the structure identical with the invention that technical scheme 1 is recorded, and, arrange described control agent to be configured to, for reaching the standard grade by the upper thread path between described Libra parts and the first or second line guide member of sewing, due to described Libra parts from by bottom dead centre to be about to make the suture path from the first line guide member of sewing to described Libra parts by the rotation top dead-centre, or in the region that the suture path of described Libra parts to the second line guide member of sewing changes, can abut with reaching the standard grade.
The feature of the invention described in technical scheme 5 is, there is the structure identical with the invention according to any one of technical scheme 1 to 4, and, described position regulating unit, can with the position adjustments of carrying out this control agent in the described moving range that abuts of reaching the standard grade at described control agent only from the bottom dead centre of Libra parts in the scope being about to the main shaft angle arriving top dead-centre.
The invention that technical scheme 6 is recorded is a kind of rotation sky scale device of Sewing machines, and it has: Libra parts, and the main shaft of its base end part and Sewing machines links, and has in leading section the hook portion that reaches the standard grade, and these Libra parts rotate centered by base end part; First line guide member of sewing, it is positioned at the front end of Sewing machines arm, to direction, side fixed configurations discretely compared with the plumb line by pivot, wherein insert from supply source reaching the standard grade to described Libra parts of reaching the standard grade below the rotating range of described Libra parts; And second line guide member of sewing, it is positioned at the bottom, front end of the described Sewing machines arm below the rotating range of described Libra parts, fixed configurations is relative with the path up and down of needle bar, wherein insert from described Libra parts reaching the standard grade to suture needle, rotated by described Libra parts, thus rotate with described main shaft and synchronously periodically lift reaching the standard grade and discharge
The feature of the rotation sky scale device of this Sewing machines is to have: control agent, and it has holding section, and this holding section, for described first line guide member of sewing or reaching the standard grade between the second line guide member of sewing and Libra parts, only abuts from side with described reaching the standard grade; And position regulating unit, it in the plane that described first line guide member of sewing or the upper thread path between the second line guide member of sewing and Libra parts change because described Libra parts rotate, can regulate the position of described control agent.
The effect of invention
The present invention only rotates from upper thread path owing to utilizing and produces side on the direction of angle change and reach the standard grade the control agent abutted, the line taking amount of reaching the standard grade that Libra parts produce can be regulated, therefore, can, easily in the gamut that carries out rotating of being reached the standard grade by Libra parts, only in a part of scope, control agent be abutted.Therefore, suitable adjustment can be carried out, namely, for the main shaft angle undesirably changing the line taking amount of reaching the standard grade that Libra parts produce, position adjustment is carried out not to abut with reaching the standard grade to control agent, or avoid expecting to avoid Libra top dead-centre, the main shaft angle of getting over the change of still point equiphase and carry out the position adjustments etc. of control agent.
In addition, be configured at position regulating unit, only can from Libra bottom dead centre in the scope being about to the main shaft angle arriving Libra top dead-centre, when with when carrying out position adjustments to this control agent in the moving range that abuts of reaching the standard grade, the line taking amount of reaching the standard grade produced Libra parts at mobile control agent regulates, can only from by the main shaft angle of Libra bottom dead centre to being about to arrive in the scope the main shaft angle of Libra top dead-centre, variation adjustment is carried out to the line taking amount of reaching the standard grade that Libra parts produce, the line taking amount of reaching the standard grade that can produce Libra parts regulates and at Libra top dead-centre or can not fall place's generation phase.
Accompanying drawing explanation
Fig. 1 is the side view observing the Zigzag sewing machine present embodiment from facing side.
Fig. 2 is the profile of the face of W-W line along Fig. 1.
Fig. 3 represents the state description figure from the change of the shortest path of reaching the standard grade till the first line guide member of sewing to the second line guide member of sewing in present embodiment, state when (A) ~ (G) illustrates that main shaft angle is 80 °, 90 °, 150 °, 180 °, 210 °, 240 °, 270 ° respectively.
Fig. 4 represents the state description figure from the change of the shortest path of reaching the standard grade till the first line guide member of sewing to the second line guide member of sewing in present embodiment, state when (A) ~ (F) illustrates that main shaft angle is 310 °, 330 °, 0 °, 30 °, 60 °, 70 ° respectively.
Fig. 5 is the curve map representing the still curve corresponding with the main shaft phase place of Sewing machines in present embodiment and rotate Libra curve T.
Fig. 6 illustrates in the control agent of present embodiment, main shaft angle scope is regulated to the key diagram regulated with the line taking amount of reaching the standard grade produced Libra parts.
Fig. 7 is the key diagram of the scope representing the control agent that should configure present embodiment.
Fig. 8 represents in this second embodiment, and from the key diagram of configuration of Libra parts through the control agent abutted of reaching the standard grade of the second line guide member of sewing.
Fig. 9 represents the still curve of the change that the amount of drawing in of reaching the standard grade that still in existing Sewing machines produces is shown and the curve map of rotation Libra curve of change of the line taking amount of reaching the standard grade that Libra parts produce is shown.
Figure 10 is the side view observing existing Zigzag sewing machine from facing side.
Figure 11 represents in the suture guiding portion of patent document 1, reaches the standard grade all the time by key diagram that line guide member of sewing limits.
Detailed description of the invention
(overall structure of working of an invention mode)
Below, based on Fig. 1 to Fig. 7, the Zigzag sewing machine 10 of the rotation Libra formula sky scale device had as the first embodiment is described.In addition, in the following description, by level and the direction of carrying out cloth feeding is set to X-direction, the horizontal direction orthogonal with cloth direction of feed is set to Y direction, vertical direction is set to Z-direction.
Described Zigzag sewing machine 10 has the known gantry configuration be made up of base portion (not shown), arm 10A and longitudinal body portion (not shown), wherein, this base portion is configured with container mechanism and feed mechanism, this arm 10A is configured in above this base portion, and this base portion and arm combine by this longitudinal body portion.
Be configured with in length direction (Y direction) leading section of described arm 10A: needle bar 12, keep suture needle 11 in its bottom; Pin swing mechanism 20, it makes needle bar 12 swing along the direction orthogonal with its length direction; Reciprocating mechanism 30, it makes needle bar move up and down; And rotating sky scale device 40, it has Libra parts 41.
Pin swing mechanism 20 has: oscillating table 22, and it links with the back shaft 21 along Y direction; And known action transmission mechanism, it is not shown, utilizes special drive source or the driving force of lower shaft, and back shaft 21 and oscillating table 22 are moved back and forth along Y direction.
In addition, oscillating table 22 can be slidably supported needle bar 12 along Z-direction via metal bearing.
Reciprocating mechanism 30 has: main shaft 31, and it is arranged along Y direction; Rotary hammer 32, it is fixedly mounted on the leading section of main shaft 31; Needle bar toggle-action lever 33, upper end, in the mode can rotated around Y-axis, is attached at the position of the pivot bias relative to rotary hammer 32 by it; And needle bar abut 34, its fixing maintenance needle bar 12.
Described main shaft 31 links with not shown sewing machine electromotor and is driven in rotation.
In addition, needle bar abut 34 can rotate around Y-axis and can be slidingly supported on the bottom of needle bar toggle-action lever 33 along Y direction.Therefore, even if when utilizing pin swing mechanism 20 to apply the reciprocating action along Y direction via oscillating table 22 to needle bar 12, also can, while allowing this reciprocating action, be applied to move up and down by needle bar abut 34 pairs of needle bars 12.
In addition, although omit the description, this Zigzag sewing machine 10 has the mechanism of the known features such as the container mechanism be wound around of reaching the standard grade and roll off the production line, the cloth feeding mechanism carrying out cloth feeding along X-direction.
(sky scale device)
Rotate sky scale device 40 and there is Libra parts 41, armature 42, connection shaft 43, first line guide member of sewing 44, second line guide member of sewing 45, over cap 46, control agent 51 and position regulating unit 52.
Armature 42 and main shaft 31 link by the two ends of connection shaft 43, and armature 42 and main shaft 31 are rotated in linkage.
Panel 60 is fixed on the length direction end of arm 10A, is formed with rotatably chimeric with described armature 42 opening portion 61.
The base end part of Libra parts 41 is fixedly supported on armature 42, and the clockwise direction (arrow R direction) along Fig. 1 together with armature 42 rotates.The leading section of Libra parts 41 extends from pivot to radial outside.
In addition, have a pair pawl 41a, 41b as suture hook portion in the leading section of Libra parts 41, its both direction to the tangential direction rotating circular arc extends.Each pawl 41a, 41b are bent to form along with towards leading section to the direction away from panel 60.By forming described shape, thus in the leading section of Libra parts 41 downward time, the T that reaches the standard grade is around the rear side entering each pawl 41a, 41b and by hook, the T that prevents from reaching the standard grade comes off from Libra parts 41.
First line guide member of sewing 44 be positioned at Sewing machines arm front end and relative to Fig. 1 right of operator sewing machine frame on the surface, be positioned at the below of the rotating range of described Libra parts 41, and compared with the plumb line of the pivot by Libra parts 41 to side fixed configurations discretely.In other words, the first line guide member of sewing 44 configures discretely to direction, side compared with the second line guide member of sewing 45 described later.Insert in 1st line guide member of sewing 44 from the reach the standard grade T of supply source to Libra parts 41 that reach the standard grade.
In addition, the 2nd line guide member of sewing 45 is positioned at the bottom, front end of the arm of bottom, the i.e. Sewing machines of the described panel 60 below the rotating range of described Libra parts 41, and fixed configurations is roughly relative with the path up and down of needle bar 12.The T that reaches the standard grade in the needle bar stringing portion 13 from Libra parts 41 to suture needle 12 is inserted in second line guide member of sewing 45.
Above-mentioned line guide member of sewing 44,45 is all formed as following structure, that is, make to reach the standard grade T insertion along reaching the standard grade in the through wires hole (not shown) of path opening, guides and reaches the standard grade to make it all the time by the scope of fixed width.
In addition, in Libra parts 41, before being positioned at the direction of rotation near its base end part, the end edge portion place of (downstream) side is formed with recess 41c.Described recess 41c is, Spindle rotation angle degree be about to be (the Spindle rotation angle degree of needle bar top dead-centre is set to 0 °) near 90 °, namely suture needle 11 start to run through the timing of cloth, by by from the first line guide member of sewing 44 via Libra parts 41 side edge part through the second line guide member of sewing 45 reach the standard grade T built on recess 41c, thus when discharging the tension force of the T that reaches the standard grade lifted by Libra parts 41, there is surplus in the T that makes to reach the standard grade, thus, the T that reaches the standard grade when making suture needle 11 run through cloth has surplus (with reference to Fig. 3 (B)).Reach the standard grade T built in recess 41c time, the Spindle rotation angle degree discharged the tension force of the T that reaches the standard grade that Libra parts 41 lift is for falling a R (with reference to Fig. 5).
Control agent 51 utilizes hold-down screw 54 and is fixed on panel 60 at base portion 53 place, has the holding section 51A of the pole shape vertically arranged along Y direction in the extension front end of extending upward from base portion 53.The only side periphery of this holding section 51A abuts with the T that reaches the standard grade between Libra parts 41 and the first line guide member of sewing 44.The line taking amount of the T that reaches the standard grade that control agent 51 pairs of Libra parts 41 produce is carried out change and is regulated.
The position regulating unit 52 carrying out the position adjustments of control agent 51 is made up of base portion 53, elongated hole 53a, hold-down screw 54 and spline pin 55.
Base portion 53 forms elongated hole 53a along its length, in this elongated hole 53a, insert described hold-down screw 54.In addition, the chimeric spline pin 55 having the convex protruded from panel 60 in elongated hole 53a.By hold-down screw 54 is relaxed, utilize spline pin 55 and hold-down screw 54 guide and control agent 51 is moved along elongated hole 53a, thus regulate in the plane of plane, the i.e. panel 60 of the path change of reaching the standard grade described in the position of control agent 51 can being made in the rotation due to described Libra parts 41.
Here, based on Fig. 3 to Fig. 6, the change in the shortest suture path of reaching the standard grade utilizing Libra parts 41 to produce is described.
In addition, in Fig. 4, the double dot dash line of each figure is the shortest path of reaching the standard grade shown in when supposing do not have control agent 51, in addition, in Fig. 3 and Fig. 4, omits shown position regulon 52.
In addition, in Figure 5, rotate Libra curve T and the situation that there is not control agent 51 is shown, rotate Libra curve Tx (chain-dotted line) and the situation that the line taking amount of reaching the standard grade utilizing control agent 51 pairs of Libra parts to produce regulates is shown.
In addition, in the explanation in the shortest suture path of this paragraph, do not consider the impact produced because control agent 51 (holding section 51A) abuts with the T that reaches the standard grade.
Libra parts 41 are as shown in Fig. 3 (A), Fig. 4 (A), Fig. 5, be arranged on armature 42 in the following manner, namely, at the about 310 ° of places of main shaft angle, becoming the line taking amount of reaching the standard grade is minimum Libra bottom dead centre M, at the about 80 ° of places of main shaft angle, becoming the line taking amount of reaching the standard grade is maximum Libra top dead-centre J.
And, in this Sewing machines 10, being set as Libra bottom dead centre M place from the shortest suture path (hereinafter referred to as " the shortest suture path ") of the first line guide member of sewing 44 to Libra parts 41, (consistent with the direction in the about 70 ° of the shortest suture paths located of main shaft angle with the line segment L1 that the pivot of the first line guide member of sewing 44 and Libra parts 41 is linked.With reference to Fig. 6) just in time overlap.
And, by the shortest suture path after Libra bottom dead centre M, its slope relative to line segment L1 changes to the left (counterclockwise) of Fig. 6 centered by the first line guide member of sewing 44, at the about 0 ° of place of main shaft angle, the angle that the shortest suture path is formed relative to line segment L1 and the change of left (counterclockwise) angle become maximum.The straight line in the shortest suture path when θ a of Fig. 6 represents that the angle along (counterclockwise) is to the left changed to maximum.
And, if exceed maximum left indexed position θ a, right (clockwise) change in its backward Fig. 6 of slope in then the shortest suture path, at the about 80 ° of places of main shaft angle, by Libra top dead-centre J (the θ b of Fig. 6 is the line segment in the suture path along Libra top dead center), after this, angle through right (clockwise) and left (counterclockwise) changes, at the about 270 ° of places of main shaft angle, the angle that the shortest suture path is formed relative to line segment L1 and the change of right (clockwise) angle become maximum, then, the shortest suture path to the left (counterclockwise) arrives Libra bottom dead centre M again through over-angle change.
Require that control agent 51 regulates the line taking amount of Libra parts 41 in the following manner, namely, avoid at Libra top dead-centre J and fall a R place T that reaches the standard grade is had an impact, and reducing the difference of the T amount of drawing in of reaching the standard grade of the still generation at more still point (still discharge the Spindle rotation angle degree of reaching the standard grade) G place and the T line taking amount of reaching the standard grade of Libra parts 41 generation as far as possible.
Control agent 51 only abuts from side with the described T of reaching the standard grade, and this side is that upper thread path rotates centered by the described first or second line guide member of sewing 44,45 because described Libra parts rotate, the sidepiece produced on the direction of angle change.Therefore, control agent 51 changes the path of this T that reaches the standard grade and the line taking amount of the T that reaches the standard grade regulating described Libra parts 41 to produce.
Be set as in this Sewing machines 10, be configured to by control agent 51 such as can abutting with reaching the standard grade from Libra bottom dead centre M to the scope being about to arrive Libra top dead-centre J.
In the figure 7, θ c is the straight line along the shortest suture path of the T that reaches the standard grade under the anglec of rotation of getting over still point G (Fig. 5).
In order to the control agent 51 before and after position adjustments can be made abutting with reaching the standard grade to the rotation angle range being about to arrive Libra top dead-centre J from Libra bottom dead centre M, control agent 51 is configured in the region clamped by straight line θ b and straight line θ c.
In addition, preferably control agent 51 is configured in the outside of the rotating range H of Libra parts 41, to avoid interfering with Libra parts 41.
According to the above, preferred control agent 51 be configured in by straight line L1, straight line θ c and circular arc H around region E in (comprise the line upper part of straight line L1 and straight line θ c, do not comprise the line upper part of circular arc H).In addition, can the scope of adjusting position also the dropping in the scope of region E of preferred holding section 51A.
In the present embodiment, control agent 51 is made the line upper part of linearly L1 can to carry out position adjustments.
In addition, elongated hole 53a is parallel with line segment L1.Control agent 51 can when hold-down screw 54 is lax and carry out position adjustments, make holding section 51A all the time along the direction parallel with line segment L1, carry out moving adjustment in the scope of not disengagement zone E.
Be configured according to above-mentioned, control agent 51 can make holding section 51A only abut with the T that reaches the standard grade from the first line guide member of sewing 44 to Libra parts 41 in the scope of about 310 ° ~ 70 ° of main shaft angle, can only regulate in the interval line taking amount to the T that reaches the standard grade that Libra parts 41 produce of this Spindle rotation angle degree.
In addition, position adjustments can be carried out in the aforementioned direction by making control agent 51 (holding section 51A), thus the increase and decrease of the line taking amount of reaching the standard grade that Libra parts can be regulated to produce increases to make it, and without the need to being used in the interval change of main shaft angle regulated the line taking amount of reaching the standard grade of Libra parts generation.
(action effect of sky scale device)
Based on Fig. 5, the embody rule to the line taking amount adjustment rotating the T that reaches the standard grade that sky scale device 40 produces and effect thereof are described.
In Zigzag sewing machine 10, especially when the tension force of the T that reaches the standard grade is set lower, still release reach the standard grade T cross still (the G point in the rotation Libra curve K of Fig. 5: about 350 ° of main shaft angle) time easily produce suture disorder.Therefore, need to adjust in the scope comprising the regulation Spindle rotation angle degree crossing still timing, the line taking amount of reaching the standard grade that Libra parts 41 are produced diminishes further relative to the difference of the T amount of drawing in of reaching the standard grade that still produces.
On the other hand, owing to falling a R place at the maximum Libra top dead-centre J of the T line taking amount of reaching the standard grade making Libra parts 41 produce and T built of reaching the standard grade at the recess 41c place of Libra parts 41, easily stitching is formed and have an impact, therefore, require the phase place (Spindle rotation angle degree) of the above-mentioned action of execution and do not produce variation in the T line taking amount of reaching the standard grade that these phase place place Libra parts produce.In addition, in this Sewing machines 10, be about 80 ° by the phase settings of Libra top dead-centre J, a R will be fallen and be set as about 90 °.
Lax hold-down screw 54, makes control agent 51 move along line segment L1 and adjust position, carries out increase and decrease thus regulate the line taking amount of the T that reaches the standard grade that Libra parts 41 produce.In this case, the T line taking amount of reaching the standard grade Libra parts 41 being produced by moving to the direction away from the first guide member 44 increases, and the line taking amount of reaching the standard grade Libra parts 44 being produced by moving to the direction near the first line guide member of sewing 44 reduces.
Further, behind the position determining control agent 51, the position of screw 54 and secured adjusted body 51 is fastened and fixed.
When making, from main shaft angle about 310 ° in the scope of main shaft angle 70 °, holding section 51A abuts with the T that reaches the standard grade from the first line guide member of sewing 44 to Libra parts 41, by making the shortest suture path distance increase because the T that reaches the standard grade is bending, thus the line taking amount of the T that reaches the standard grade that Libra parts 41 are produced increases.Therefore, the rotation Libra curve Tx shown in Fig. 5 can be obtained, when crossing still, the difference of the T line taking amount of reaching the standard grade of the reach the standard grade amount of drawing in and Libra parts 41 generation that still produces can be reduced, suppress the generation of suture movement.
As mentioned above, in Zigzag sewing machine 10, utilize and abut with the T that reaches the standard grade from the first line guide member of sewing 44 to Libra parts 41 from Libra direction of rotation downstream (Fig. 1 left) by making holding section 51A during bottom dead centre at Libra, thus can regulate the line taking amount of the T that reaches the standard grade that Libra parts 41 produce, therefore, such as can avoid Libra top dead-centre J and fall a R and only comprising the main shaft angle that regulates of line taking amount wanting to produce Libra parts (such as, cross Spindle rotation angle degree during still) in interior a part of scope, holding section 51A is easily made to abut.
Therefore, carrying out that can be corresponding with avoiding the objects such as suture moves suitably regulates, and can not produce unnecessary impact to making.
In addition, because the base portion 53 of position regulating unit 52 can be supported along prescribed direction rectilinear movement relative to hold-down screw 54, regulate so the line taking amount of reaching the standard grade that can produce Libra parts carries out increase and decrease, and without the need to being used in the interval change of main shaft angle regulated the line taking amount of reaching the standard grade of Libra parts generation, thus, can be more convenient and promptly carry out adjustment operation.
(the second embodiment)
Described control agent 51 is configured to abut with from the first reaching the standard grade of line guide member of sewing 44 to Libra parts 41, but is not limited thereto.
That is, also can shown in the second embodiment as shown in Figure 8, be configured to by control agent 51, holding section 51A, for the T that reaches the standard grade from Libra parts 41 to the second line guide member of sewing 45, abuts from Libra direction of rotation downstream (Fig. 1 left).
And, in this case, also can by along Libra bottom dead centre from Libra parts 41 to the second line guide member of sewing 45 the shortest on thread path straight line (comprising this straight line upper part), along in the region that the circular arc (not comprising the line upper part of this circular arc) of the more straight line (comprising this straight line upper part) of the shortest upper thread path from Libra parts 41 to the second line guide member of sewing 45 of still point and the rotating range along Libra parts 41 surrounds into, configuration adjustment body 51, and position adjustments is carried out in this region.
Specifically, position regulating unit 52A is configured to have the spline pin 55A supporting the base portion 53A of control agent 51, the hold-down screw 54A of fastening base portion 53A and base portion 53A, base portion 53A can along the straight line L2 direction linked by the pivot of the fixed position of control agent 51 and described Libra parts, and the shift position of carrying out control agent 51 regulates.
And, preferably be configured to, at straight line L2 part place's configuration holding section 51A, and base portion 53A can move abreast with above-mentioned straight line L2, wherein, this straight line L2 is the shortest path of reaching the standard grade at the about 70 ° of places of main shaft angle from Libra parts 41 to the second line guide member of sewing 45.
And, even if when being configured to as mentioned above make holding section 51A with when abutting across reaching the standard grade between Libra parts 41 and the second line guide member of sewing 45, the effect roughly the same with situation about abutting across reaching the standard grade between Libra parts 41 and the first line guide member of sewing 44 also can be obtained.
(other)
In addition, position regulating unit 52 is formed as only to move adjustment along fixing straight ahead direction to control agent 51, but also can be formed as, along in the plane of panel, in the E of region, at random carrying out position adjustments.In this case, control agent 51 can be more easily utilized to change the scope of the main shaft angle that the line taking amount of reaching the standard grade for producing Libra parts regulates.
Claims (5)
1. a rotation sky scale device for Sewing machines, it has:
Libra parts, the rotation of the main shaft of itself and Sewing machines synchronously rotates, and has in leading section the hook portion that reaches the standard grade;
First line guide member of sewing, wherein inserts from supply source reaching the standard grade to described Libra parts of reaching the standard grade; And
Second line guide member of sewing, wherein inserts from described Libra parts reaching the standard grade to suture needle,
Rotated by described Libra parts, thus rotate with described main shaft and synchronously periodically lift reaching the standard grade and discharge,
The feature of the rotation sky scale device of this Sewing machines is to have:
Control agent, it only produces the side the direction of angle change from upper thread path rotates centered by the described first or second line guide member of sewing because described Libra parts rotate, abut with described reaching the standard grade, change the path that this is reached the standard grade thus, the line taking amount of reaching the standard grade that described Libra parts produce is regulated; And
Position regulating unit, its thread path on described carries out, in the plane of rotating, carrying out position adjustments to described control agent,
Described position regulating unit, can with the position adjustments of carrying out this control agent in the described moving range that abuts of reaching the standard grade at described control agent only from the bottom dead centre of Libra parts in the scope being about to the main shaft angle arriving top dead-centre.
2. the rotation sky scale device of Sewing machines according to claim 1, is characterized in that,
Described control agent is configured to abut to described reaching the standard grade of Libra parts with from described first line guide member of sewing.
3. the rotation sky scale device of Sewing machines according to claim 1, is characterized in that,
Described control agent is configured to abut to described reaching the standard grade of second line guide member of sewing with from described Libra parts.
4. the rotation sky scale device of Sewing machines according to claim 1, is characterized in that,
Arrange described control agent to be configured to,
For reaching the standard grade by the upper thread path between described Libra parts and the first or second line guide member of sewing,
Due to described Libra parts from by bottom dead centre to being about to be made by the rotation top dead-centre from the first line guide member of sewing in the suture path of described Libra parts or the region that changes from the suture path of described Libra parts to the second line guide member of sewing, can abut with reaching the standard grade.
5. a rotation sky scale device for Sewing machines, it has:
Libra parts, the main shaft of its base end part and Sewing machines links, and has in leading section the hook portion that reaches the standard grade, and the main shaft of these Libra parts and described Sewing machines links and rotates centered by base end part;
First line guide member of sewing, it is positioned at the front end of Sewing machines arm, to direction, side fixed configurations discretely compared with the plumb line by pivot, wherein insert from supply source reaching the standard grade to described Libra parts of reaching the standard grade below the rotating range of described Libra parts; And
Second line guide member of sewing, it is positioned at the bottom, front end of the described Sewing machines arm below the rotating range of described Libra parts, and fixed configurations is relative with the path up and down of needle bar, wherein inserts from described Libra parts reaching the standard grade to suture needle,
Rotated by described Libra parts, thus rotate with described main shaft and synchronously periodically lift reaching the standard grade and discharge,
The feature of the rotation sky scale device of this Sewing machines is to have:
Control agent, it has holding section, and this holding section, for described first line guide member of sewing or reaching the standard grade between the second line guide member of sewing and Libra parts, only abuts from side with described reaching the standard grade; And
Position regulating unit, it in the plane that described first line guide member of sewing or the upper thread path between the second line guide member of sewing and Libra parts change because described Libra parts rotate, can regulate the position of described control agent.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-255437 | 2010-11-16 | ||
| JP2010255437A JP5740140B2 (en) | 2010-11-16 | 2010-11-16 | sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102560914A CN102560914A (en) | 2012-07-11 |
| CN102560914B true CN102560914B (en) | 2015-08-12 |
Family
ID=46269356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110363620.8A Active CN102560914B (en) | 2010-11-16 | 2011-11-16 | The rotation sky scale device of Sewing machines |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5740140B2 (en) |
| KR (1) | KR20120052889A (en) |
| CN (1) | CN102560914B (en) |
| TW (1) | TWI589748B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107723944A (en) * | 2016-03-07 | 2018-02-23 | 吴金玉 | A kind of anticreep line sewing machine of improvement |
| JP2020074995A (en) * | 2018-11-09 | 2020-05-21 | Juki株式会社 | Zigzag stitch sewing machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4757776A (en) * | 1986-03-20 | 1988-07-19 | Brother Kogyo Kabushiki Kaisha | Thread pull-out mechanism for a sewing machine |
| JPH0779897B2 (en) * | 1990-01-10 | 1995-08-30 | ジューキ株式会社 | Thread tension control device for button sewing cycle sewing machine |
| CN1600933A (en) * | 2003-09-24 | 2005-03-30 | 兄弟工业株式会社 | Thread ram means of sewing machine |
| CN101220548A (en) * | 2007-01-11 | 2008-07-16 | Juki株式会社 | Sewing line guide member of sewing machine |
| CN101372796A (en) * | 2007-08-20 | 2009-02-25 | 大和缝纫机制造株式会社 | Thread adjusting device of sewing machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08309063A (en) * | 1995-05-22 | 1996-11-26 | Juki Corp | Blade type rotary needle thread take-up |
-
2010
- 2010-11-16 JP JP2010255437A patent/JP5740140B2/en not_active Expired - Fee Related
-
2011
- 2011-11-16 KR KR1020110119467A patent/KR20120052889A/en not_active Application Discontinuation
- 2011-11-16 TW TW100141819A patent/TWI589748B/en not_active IP Right Cessation
- 2011-11-16 CN CN201110363620.8A patent/CN102560914B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4757776A (en) * | 1986-03-20 | 1988-07-19 | Brother Kogyo Kabushiki Kaisha | Thread pull-out mechanism for a sewing machine |
| JPH0779897B2 (en) * | 1990-01-10 | 1995-08-30 | ジューキ株式会社 | Thread tension control device for button sewing cycle sewing machine |
| CN1600933A (en) * | 2003-09-24 | 2005-03-30 | 兄弟工业株式会社 | Thread ram means of sewing machine |
| CN101220548A (en) * | 2007-01-11 | 2008-07-16 | Juki株式会社 | Sewing line guide member of sewing machine |
| CN101372796A (en) * | 2007-08-20 | 2009-02-25 | 大和缝纫机制造株式会社 | Thread adjusting device of sewing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI589748B (en) | 2017-07-01 |
| JP2012105741A (en) | 2012-06-07 |
| CN102560914A (en) | 2012-07-11 |
| KR20120052889A (en) | 2012-05-24 |
| TW201241262A (en) | 2012-10-16 |
| JP5740140B2 (en) | 2015-06-24 |
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